Merge pull request #10305 from vjpai/fixdep

Resolve a circular dependence in build
diff --git a/.gitmodules b/.gitmodules
index c8ca8ab..0f00369 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -23,3 +23,7 @@
 [submodule "third_party/boringssl-with-bazel"]
 	path = third_party/boringssl-with-bazel
 	url = https://boringssl.googlesource.com/boringssl
+[submodule "third_party/cares/cares"]
+	path = third_party/cares/cares
+	url = https://github.com/c-ares/c-ares.git
+	branch = cares-1_12_0
diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..700c61c
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,30 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Mocha Tests",
+            "cwd": "${workspaceRoot}",
+            "runtimeExecutable": "${workspaceRoot}/node_modules/.bin/mocha",
+            "windows": {
+                "runtimeExecutable": "${workspaceRoot}/node_modules/.bin/mocha.cmd"
+            },
+            "runtimeArgs": [
+                "-u",
+                "tdd",
+                "--timeout",
+                "999999",
+                "--colors",
+                "${workspaceRoot}/src/node/test"
+            ],
+            "internalConsoleOptions": "openOnSessionStart"
+        },
+        {
+            "type": "node",
+            "request": "attach",
+            "name": "Attach to Process",
+            "port": 5858
+        }
+    ]
+}
diff --git a/BUILD b/BUILD
index 053f581..d659848 100644
--- a/BUILD
+++ b/BUILD
@@ -37,11 +37,11 @@
 
 load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_proto_plugin")
 
-g_stands_for = "good"
+g_stands_for = "green"
 
-core_version = "2.0.0-dev"
+core_version = "3.0.0-dev"
 
-version = "1.1.0-dev"
+version = "1.2.0"
 
 grpc_cc_library(
     name = "gpr",
@@ -67,6 +67,7 @@
         "grpc_lb_policy_pick_first",
         "grpc_lb_policy_round_robin",
         "grpc_load_reporting",
+        "grpc_resolver_dns_ares",
         "grpc_resolver_dns_native",
         "grpc_resolver_sockaddr",
         "grpc_secure",
@@ -308,8 +309,8 @@
     srcs = [
         "src/core/lib/profiling/basic_timers.c",
         "src/core/lib/profiling/stap_timers.c",
-        "src/core/lib/support/arena.c",
         "src/core/lib/support/alloc.c",
+        "src/core/lib/support/arena.c",
         "src/core/lib/support/atm.c",
         "src/core/lib/support/avl.c",
         "src/core/lib/support/backoff.c",
@@ -354,8 +355,8 @@
         "src/core/lib/support/wrap_memcpy.c",
     ],
     hdrs = [
-        "src/core/lib/support/arena.h",
         "src/core/lib/profiling/timers.h",
+        "src/core/lib/support/arena.h",
         "src/core/lib/support/backoff.h",
         "src/core/lib/support/block_annotate.h",
         "src/core/lib/support/env.h",
@@ -472,6 +473,7 @@
         "src/core/lib/iomgr/resolve_address_windows.c",
         "src/core/lib/iomgr/resource_quota.c",
         "src/core/lib/iomgr/sockaddr_utils.c",
+        "src/core/lib/iomgr/socket_factory_posix.c",
         "src/core/lib/iomgr/socket_mutator.c",
         "src/core/lib/iomgr/socket_utils_common_posix.c",
         "src/core/lib/iomgr/socket_utils_linux.c",
@@ -509,6 +511,7 @@
         "src/core/lib/json/json_reader.c",
         "src/core/lib/json/json_string.c",
         "src/core/lib/json/json_writer.c",
+        "src/core/lib/security/util/b64.c",
         "src/core/lib/slice/percent_encoding.c",
         "src/core/lib/slice/slice.c",
         "src/core/lib/slice/slice_buffer.c",
@@ -527,6 +530,7 @@
         "src/core/lib/surface/channel_ping.c",
         "src/core/lib/surface/channel_stack_type.c",
         "src/core/lib/surface/completion_queue.c",
+        "src/core/lib/surface/completion_queue_factory.c",
         "src/core/lib/surface/event_string.c",
         "src/core/lib/surface/lame_client.c",
         "src/core/lib/surface/metadata_array.c",
@@ -597,6 +601,7 @@
         "src/core/lib/iomgr/sockaddr_posix.h",
         "src/core/lib/iomgr/sockaddr_utils.h",
         "src/core/lib/iomgr/sockaddr_windows.h",
+        "src/core/lib/iomgr/socket_factory_posix.h",
         "src/core/lib/iomgr/socket_mutator.h",
         "src/core/lib/iomgr/socket_utils.h",
         "src/core/lib/iomgr/socket_utils_posix.h",
@@ -625,6 +630,7 @@
         "src/core/lib/json/json_common.h",
         "src/core/lib/json/json_reader.h",
         "src/core/lib/json/json_writer.h",
+        "src/core/lib/security/util/b64.h",
         "src/core/lib/slice/percent_encoding.h",
         "src/core/lib/slice/slice_hash_table.h",
         "src/core/lib/slice/slice_internal.h",
@@ -636,6 +642,7 @@
         "src/core/lib/surface/channel_init.h",
         "src/core/lib/surface/channel_stack_type.h",
         "src/core/lib/surface/completion_queue.h",
+        "src/core/lib/surface/completion_queue_factory.h",
         "src/core/lib/surface/event_string.h",
         "src/core/lib/surface/init.h",
         "src/core/lib/surface/lame_client.h",
@@ -847,6 +854,27 @@
 )
 
 grpc_cc_library(
+    name = "grpc_resolver_dns_ares",
+    srcs = [
+        "src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c",
+        "src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c",
+        "src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c",
+    ],
+    hdrs = [
+        "src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h",
+        "src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h",
+    ],
+    language = "c",
+    deps = [
+        "grpc_base",
+        "grpc_client_channel",
+    ],
+    external_deps = [
+        "cares",
+    ],
+)
+
+grpc_cc_library(
     name = "grpc_resolver_sockaddr",
     srcs = [
         "src/core/ext/resolver/sockaddr/sockaddr_resolver.c",
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3658b36..f54e78b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -60,6 +60,9 @@
 set(gRPC_ZLIB_PROVIDER "module" CACHE STRING "Provider of zlib library")
 set_property(CACHE gRPC_ZLIB_PROVIDER PROPERTY STRINGS "module" "package")
 
+set(gRPC_CARES_PROVIDER "module" CACHE STRING "Provider of c-ares library")
+set_property(CACHE gRPC_CARES_PROVIDER PROPERTY STRINGS "module" "package")
+
 set(gRPC_SSL_PROVIDER "module" CACHE STRING "Provider of ssl library")
 set_property(CACHE gRPC_SSL_PROVIDER PROPERTY STRINGS "module" "package")
 
@@ -126,6 +129,37 @@
   set(_gRPC_FIND_ZLIB "if(NOT ZLIB_FOUND)\n  find_package(ZLIB)\nendif()")
 endif()
 
+if("${gRPC_CARES_PROVIDER}" STREQUAL "module")
+  if(NOT CARES_ROOT_DIR)
+    set(CARES_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/src/c-ares)
+  endif()
+  string(TOLOWER ${CMAKE_SYSTEM_NAME} CARES_SYSTEM_NAME)
+  set(CARES_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/third_party/cares/cares")
+  set(CARES_BUILD_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/third_party/cares")
+  set(CARES_PLATFORM_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/third_party/cares/config_${CARES_SYSTEM_NAME}")
+  if(EXISTS "${CARES_ROOT_DIR}/CMakeLists.txt")
+    if("${CARES_SYSTEM_NAME}" MATCHES "windows")
+      add_definitions(-DCARES_STATICLIB=1)
+      add_definitions(-DWIN32_LEAN_AND_MEAN=1)
+    else()
+      add_definitions(-DHAVE_CONFIG_H=1)
+      add_definitions(-D_GNU_SOURCE=1)
+    endif()
+    add_subdirectory(src/c-ares third_party/cares)
+    if(TARGET cares)
+        set(_gRPC_CARES_LIBRARIES cares)
+    endif()
+  else()
+    message(WARNING "gRPC_CARES_PROVIDER is \"module\" but CARES_ROOT_DIR is wrong")
+  endif()
+elseif("${gRPC_CARES_PROVIDER}" STREQUAL "package")
+  find_package(CARES)
+  if(TARGET CARES::CARES)
+    set(_gRPC_CARES_LIBRARIES CARES::CARES)
+  endif()
+  set(_gRPC_FIND_CARES "if(NOT CARES_FOUND)\n  find_package(CARES)\nendif()")
+endif()
+
 if("${gRPC_PROTOBUF_PROVIDER}" STREQUAL "module")
   # Building the protobuf tests require gmock what is not part of a standard protobuf checkout.
   # Disable them unless they are explicitly requested from the cmake command line (when we assume
@@ -277,7 +311,7 @@
     file(RELATIVE_PATH REL_FIL ${CMAKE_SOURCE_DIR} ${ABS_FIL})
     get_filename_component(REL_DIR ${REL_FIL} DIRECTORY)
     set(RELFIL_WE "${REL_DIR}/${FIL_WE}")
-    
+
     add_custom_command(
       OUTPUT "${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.grpc.pb.cc"
              "${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.grpc.pb.h"
@@ -293,7 +327,7 @@
       WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
       COMMENT "Running gRPC C++ protocol buffer compiler on ${FIL}"
       VERBATIM)
-      
+
       set_source_files_properties("${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.grpc.pb.cc" "${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.grpc.pb.h" "${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.pb.cc" "${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.pb.h" PROPERTIES GENERATED TRUE)
   endforeach()
 endfunction()
@@ -764,6 +798,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -853,6 +891,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -913,6 +955,7 @@
   src/core/lib/iomgr/resolve_address_windows.c
   src/core/lib/iomgr/resource_quota.c
   src/core/lib/iomgr/sockaddr_utils.c
+  src/core/lib/iomgr/socket_factory_posix.c
   src/core/lib/iomgr/socket_mutator.c
   src/core/lib/iomgr/socket_utils_common_posix.c
   src/core/lib/iomgr/socket_utils_linux.c
@@ -950,6 +993,7 @@
   src/core/lib/json/json_reader.c
   src/core/lib/json/json_string.c
   src/core/lib/json/json_writer.c
+  src/core/lib/security/util/b64.c
   src/core/lib/slice/percent_encoding.c
   src/core/lib/slice/slice.c
   src/core/lib/slice/slice_buffer.c
@@ -968,6 +1012,7 @@
   src/core/lib/surface/channel_ping.c
   src/core/lib/surface/channel_stack_type.c
   src/core/lib/surface/completion_queue.c
+  src/core/lib/surface/completion_queue_factory.c
   src/core/lib/surface/event_string.c
   src/core/lib/surface/lame_client.c
   src/core/lib/surface/metadata_array.c
@@ -1031,7 +1076,6 @@
   src/core/lib/security/transport/security_handshaker.c
   src/core/lib/security/transport/server_auth_filter.c
   src/core/lib/security/transport/tsi_error.c
-  src/core/lib/security/util/b64.c
   src/core/lib/security/util/json_util.c
   src/core/lib/surface/init_secure.c
   src/core/lib/tsi/fake_transport_security.c
@@ -1073,6 +1117,9 @@
   third_party/nanopb/pb_encode.c
   src/core/ext/lb_policy/pick_first/pick_first.c
   src/core/ext/lb_policy/round_robin/round_robin.c
+  src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c
+  src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c
+  src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c
   src/core/ext/resolver/dns/native/dns_resolver.c
   src/core/ext/resolver/sockaddr/sockaddr_resolver.c
   src/core/ext/load_reporting/load_reporting.c
@@ -1114,6 +1161,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -1121,6 +1172,7 @@
   ${_gRPC_BASELIB_LIBRARIES}
   ${_gRPC_SSL_LIBRARIES}
   ${_gRPC_ZLIB_LIBRARIES}
+  ${_gRPC_CARES_LIBRARIES}
   ${_gRPC_ALLTARGETS_LIBRARIES}
   gpr
 )
@@ -1224,6 +1276,7 @@
   src/core/lib/iomgr/resolve_address_windows.c
   src/core/lib/iomgr/resource_quota.c
   src/core/lib/iomgr/sockaddr_utils.c
+  src/core/lib/iomgr/socket_factory_posix.c
   src/core/lib/iomgr/socket_mutator.c
   src/core/lib/iomgr/socket_utils_common_posix.c
   src/core/lib/iomgr/socket_utils_linux.c
@@ -1261,6 +1314,7 @@
   src/core/lib/json/json_reader.c
   src/core/lib/json/json_string.c
   src/core/lib/json/json_writer.c
+  src/core/lib/security/util/b64.c
   src/core/lib/slice/percent_encoding.c
   src/core/lib/slice/slice.c
   src/core/lib/slice/slice_buffer.c
@@ -1279,6 +1333,7 @@
   src/core/lib/surface/channel_ping.c
   src/core/lib/surface/channel_stack_type.c
   src/core/lib/surface/completion_queue.c
+  src/core/lib/surface/completion_queue_factory.c
   src/core/lib/surface/event_string.c
   src/core/lib/surface/lame_client.c
   src/core/lib/surface/metadata_array.c
@@ -1365,7 +1420,6 @@
   src/core/lib/security/transport/security_handshaker.c
   src/core/lib/security/transport/server_auth_filter.c
   src/core/lib/security/transport/tsi_error.c
-  src/core/lib/security/util/b64.c
   src/core/lib/security/util/json_util.c
   src/core/lib/surface/init_secure.c
   src/core/lib/tsi/fake_transport_security.c
@@ -1397,6 +1451,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -1526,6 +1584,7 @@
   src/core/lib/iomgr/resolve_address_windows.c
   src/core/lib/iomgr/resource_quota.c
   src/core/lib/iomgr/sockaddr_utils.c
+  src/core/lib/iomgr/socket_factory_posix.c
   src/core/lib/iomgr/socket_mutator.c
   src/core/lib/iomgr/socket_utils_common_posix.c
   src/core/lib/iomgr/socket_utils_linux.c
@@ -1563,6 +1622,7 @@
   src/core/lib/json/json_reader.c
   src/core/lib/json/json_string.c
   src/core/lib/json/json_writer.c
+  src/core/lib/security/util/b64.c
   src/core/lib/slice/percent_encoding.c
   src/core/lib/slice/slice.c
   src/core/lib/slice/slice_buffer.c
@@ -1581,6 +1641,7 @@
   src/core/lib/surface/channel_ping.c
   src/core/lib/surface/channel_stack_type.c
   src/core/lib/surface/completion_queue.c
+  src/core/lib/surface/completion_queue_factory.c
   src/core/lib/surface/event_string.c
   src/core/lib/surface/lame_client.c
   src/core/lib/surface/metadata_array.c
@@ -1622,6 +1683,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -1711,6 +1776,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -1775,6 +1844,7 @@
   src/core/lib/iomgr/resolve_address_windows.c
   src/core/lib/iomgr/resource_quota.c
   src/core/lib/iomgr/sockaddr_utils.c
+  src/core/lib/iomgr/socket_factory_posix.c
   src/core/lib/iomgr/socket_mutator.c
   src/core/lib/iomgr/socket_utils_common_posix.c
   src/core/lib/iomgr/socket_utils_linux.c
@@ -1812,6 +1882,7 @@
   src/core/lib/json/json_reader.c
   src/core/lib/json/json_string.c
   src/core/lib/json/json_writer.c
+  src/core/lib/security/util/b64.c
   src/core/lib/slice/percent_encoding.c
   src/core/lib/slice/slice.c
   src/core/lib/slice/slice_buffer.c
@@ -1830,6 +1901,7 @@
   src/core/lib/surface/channel_ping.c
   src/core/lib/surface/channel_stack_type.c
   src/core/lib/surface/completion_queue.c
+  src/core/lib/surface/completion_queue_factory.c
   src/core/lib/surface/event_string.c
   src/core/lib/surface/lame_client.c
   src/core/lib/surface/metadata_array.c
@@ -1896,6 +1968,9 @@
   src/core/ext/client_channel/subchannel.c
   src/core/ext/client_channel/subchannel_index.c
   src/core/ext/client_channel/uri_parser.c
+  src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c
+  src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c
+  src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c
   src/core/ext/resolver/dns/native/dns_resolver.c
   src/core/ext/resolver/sockaddr/sockaddr_resolver.c
   src/core/ext/load_reporting/load_reporting.c
@@ -1946,6 +2021,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -2029,6 +2108,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -2069,6 +2152,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -2148,6 +2235,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE ${_gRPC_PROTO_GENS_DIR}
 )
@@ -2384,6 +2475,7 @@
   src/core/lib/iomgr/resolve_address_windows.c
   src/core/lib/iomgr/resource_quota.c
   src/core/lib/iomgr/sockaddr_utils.c
+  src/core/lib/iomgr/socket_factory_posix.c
   src/core/lib/iomgr/socket_mutator.c
   src/core/lib/iomgr/socket_utils_common_posix.c
   src/core/lib/iomgr/socket_utils_linux.c
@@ -2421,6 +2513,7 @@
   src/core/lib/json/json_reader.c
   src/core/lib/json/json_string.c
   src/core/lib/json/json_writer.c
+  src/core/lib/security/util/b64.c
   src/core/lib/slice/percent_encoding.c
   src/core/lib/slice/slice.c
   src/core/lib/slice/slice_buffer.c
@@ -2439,6 +2532,7 @@
   src/core/lib/surface/channel_ping.c
   src/core/lib/surface/channel_stack_type.c
   src/core/lib/surface/completion_queue.c
+  src/core/lib/surface/completion_queue_factory.c
   src/core/lib/surface/event_string.c
   src/core/lib/surface/lame_client.c
   src/core/lib/surface/metadata_array.c
@@ -2521,6 +2615,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE ${_gRPC_PROTO_GENS_DIR}
 )
@@ -2690,6 +2788,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -2746,6 +2848,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE ${_gRPC_PROTO_GENS_DIR}
 )
@@ -2801,6 +2907,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -2874,6 +2984,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -3011,6 +3125,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE ${_gRPC_PROTO_GENS_DIR}
 )
@@ -3161,6 +3279,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -3216,6 +3338,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -3271,6 +3397,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE ${_gRPC_PROTO_GENS_DIR}
 )
@@ -3347,6 +3477,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -3398,6 +3532,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -3464,6 +3602,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -3511,6 +3653,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -3576,6 +3722,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -3623,6 +3773,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -3707,6 +3861,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -3748,6 +3906,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -3769,6 +3931,94 @@
 
 if (gRPC_BUILD_TESTS)
 
+add_library(ares
+  third_party/cares/cares/ares__close_sockets.c
+  third_party/cares/cares/ares__get_hostent.c
+  third_party/cares/cares/ares__read_line.c
+  third_party/cares/cares/ares__timeval.c
+  third_party/cares/cares/ares_cancel.c
+  third_party/cares/cares/ares_create_query.c
+  third_party/cares/cares/ares_data.c
+  third_party/cares/cares/ares_destroy.c
+  third_party/cares/cares/ares_expand_name.c
+  third_party/cares/cares/ares_expand_string.c
+  third_party/cares/cares/ares_fds.c
+  third_party/cares/cares/ares_free_hostent.c
+  third_party/cares/cares/ares_free_string.c
+  third_party/cares/cares/ares_getenv.c
+  third_party/cares/cares/ares_gethostbyaddr.c
+  third_party/cares/cares/ares_gethostbyname.c
+  third_party/cares/cares/ares_getnameinfo.c
+  third_party/cares/cares/ares_getopt.c
+  third_party/cares/cares/ares_getsock.c
+  third_party/cares/cares/ares_init.c
+  third_party/cares/cares/ares_library_init.c
+  third_party/cares/cares/ares_llist.c
+  third_party/cares/cares/ares_mkquery.c
+  third_party/cares/cares/ares_nowarn.c
+  third_party/cares/cares/ares_options.c
+  third_party/cares/cares/ares_parse_a_reply.c
+  third_party/cares/cares/ares_parse_aaaa_reply.c
+  third_party/cares/cares/ares_parse_mx_reply.c
+  third_party/cares/cares/ares_parse_naptr_reply.c
+  third_party/cares/cares/ares_parse_ns_reply.c
+  third_party/cares/cares/ares_parse_ptr_reply.c
+  third_party/cares/cares/ares_parse_soa_reply.c
+  third_party/cares/cares/ares_parse_srv_reply.c
+  third_party/cares/cares/ares_parse_txt_reply.c
+  third_party/cares/cares/ares_platform.c
+  third_party/cares/cares/ares_process.c
+  third_party/cares/cares/ares_query.c
+  third_party/cares/cares/ares_search.c
+  third_party/cares/cares/ares_send.c
+  third_party/cares/cares/ares_strcasecmp.c
+  third_party/cares/cares/ares_strdup.c
+  third_party/cares/cares/ares_strerror.c
+  third_party/cares/cares/ares_timeout.c
+  third_party/cares/cares/ares_version.c
+  third_party/cares/cares/ares_writev.c
+  third_party/cares/cares/bitncmp.c
+  third_party/cares/cares/inet_net_pton.c
+  third_party/cares/cares/inet_ntop.c
+  third_party/cares/cares/windows_port.c
+)
+
+if(WIN32 AND MSVC)
+  set_target_properties(ares PROPERTIES COMPILE_PDB_NAME "ares"
+    COMPILE_PDB_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}"
+  )
+  if (gRPC_INSTALL)
+    install(FILES ${CMAKE_CURRENT_BINARY_DIR}/ares.pdb
+      DESTINATION ${CMAKE_INSTALL_LIBDIR} OPTIONAL
+    )
+  endif()
+endif()
+
+
+target_include_directories(ares
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
+  PRIVATE ${BORINGSSL_ROOT_DIR}/include
+  PRIVATE ${PROTOBUF_ROOT_DIR}/src
+  PRIVATE ${ZLIB_INCLUDE_DIR}
+  PRIVATE ${BENCHMARK}/include
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
+)
+
+target_link_libraries(ares
+  ${_gRPC_SSL_LIBRARIES}
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+)
+
+
+endif (gRPC_BUILD_TESTS)
+if (gRPC_BUILD_TESTS)
+
 add_library(bad_client_test
   test/core/bad_client/bad_client.c
 )
@@ -3793,6 +4043,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -3832,6 +4086,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -3922,6 +4180,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4012,6 +4274,10 @@
   PRIVATE ${ZLIB_INCLUDE_DIR}
   PRIVATE ${BENCHMARK}/include
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4041,6 +4307,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4068,6 +4338,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4095,6 +4369,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4120,6 +4398,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4147,6 +4429,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4172,6 +4458,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4200,6 +4490,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4227,6 +4521,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4252,6 +4550,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4277,6 +4579,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4304,6 +4610,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4331,6 +4641,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4358,6 +4672,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4385,6 +4703,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4412,6 +4734,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4439,6 +4765,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4466,6 +4796,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4493,6 +4827,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4520,6 +4858,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4547,6 +4889,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4574,6 +4920,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4601,6 +4951,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4629,6 +4983,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4657,6 +5015,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4684,6 +5046,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4712,6 +5078,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4741,6 +5111,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4770,6 +5144,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4798,6 +5176,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4825,6 +5207,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4853,6 +5239,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4882,6 +5272,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4909,6 +5303,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4941,6 +5339,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -4971,6 +5373,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5003,6 +5409,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5031,6 +5441,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5056,6 +5470,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5081,6 +5499,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5106,6 +5528,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5131,6 +5557,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5156,6 +5586,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5181,6 +5615,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5206,6 +5644,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5231,6 +5673,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5256,6 +5702,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5281,6 +5731,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5306,6 +5760,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5331,6 +5789,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5356,6 +5818,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5381,6 +5847,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5406,6 +5876,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5431,6 +5905,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5456,6 +5934,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5483,6 +5965,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5510,6 +5996,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5537,6 +6027,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5564,6 +6058,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5591,6 +6089,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5618,6 +6120,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5644,6 +6150,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5678,6 +6188,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5705,6 +6219,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5732,6 +6250,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5760,6 +6282,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5788,6 +6314,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5814,6 +6344,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5847,6 +6381,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5873,6 +6411,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5907,6 +6449,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5937,6 +6483,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5966,6 +6516,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -5993,6 +6547,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6020,6 +6578,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6047,6 +6609,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6075,6 +6641,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6104,6 +6674,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6132,6 +6706,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6159,6 +6737,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6186,6 +6768,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6211,6 +6797,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6238,6 +6828,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6265,6 +6859,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6292,6 +6890,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6319,6 +6921,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6346,6 +6952,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6373,6 +6983,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6400,6 +7014,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6428,6 +7046,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6456,6 +7078,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6483,6 +7109,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6510,6 +7140,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6537,6 +7171,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6562,6 +7200,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6589,6 +7231,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6616,6 +7262,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6644,6 +7294,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6673,6 +7327,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6701,6 +7359,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6728,6 +7390,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6755,6 +7421,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6782,6 +7452,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6809,6 +7483,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6836,6 +7514,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6863,6 +7545,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6890,6 +7576,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6917,6 +7607,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6944,6 +7638,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6971,6 +7669,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -6998,6 +7700,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7026,6 +7732,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7054,6 +7764,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7081,6 +7795,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7109,6 +7827,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7137,6 +7859,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7165,6 +7891,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7194,6 +7924,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7222,6 +7956,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7249,6 +7987,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7276,6 +8018,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7303,6 +8049,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7330,6 +8080,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7357,6 +8111,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7384,6 +8142,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7411,6 +8173,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7439,6 +8205,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7468,6 +8238,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7496,6 +8270,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7524,6 +8302,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -7553,6 +8335,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -7588,6 +8374,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -7623,6 +8413,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -7659,6 +8453,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -7698,6 +8496,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -7737,6 +8539,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -7776,6 +8582,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -7815,6 +8625,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -7854,6 +8668,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -7893,6 +8711,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -7932,6 +8754,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -7971,6 +8797,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8010,6 +8840,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8049,6 +8883,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8088,6 +8926,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8127,6 +8969,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8165,6 +9011,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8197,6 +9047,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8229,6 +9083,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8266,6 +9124,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8302,6 +9164,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8372,6 +9238,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8440,6 +9310,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8469,6 +9343,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8501,6 +9379,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8535,6 +9417,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8569,6 +9455,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8599,6 +9489,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8633,6 +9527,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8668,6 +9566,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8703,6 +9605,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8745,6 +9651,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8777,6 +9687,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -8810,6 +9724,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE ${_gRPC_PROTO_GENS_DIR}
 )
@@ -8844,6 +9762,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE ${_gRPC_PROTO_GENS_DIR}
 )
@@ -8878,6 +9800,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE ${_gRPC_PROTO_GENS_DIR}
 )
@@ -8912,6 +9838,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE ${_gRPC_PROTO_GENS_DIR}
 )
@@ -8946,6 +9876,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE ${_gRPC_PROTO_GENS_DIR}
 )
@@ -8980,6 +9914,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE ${_gRPC_PROTO_GENS_DIR}
 )
@@ -9014,6 +9952,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE ${_gRPC_PROTO_GENS_DIR}
 )
@@ -9064,6 +10006,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9109,6 +10055,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9149,6 +10099,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9184,6 +10138,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9219,6 +10177,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9255,6 +10217,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9290,6 +10256,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9329,6 +10299,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9370,6 +10344,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9406,6 +10384,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9450,6 +10432,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9483,6 +10469,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9518,6 +10508,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9548,6 +10542,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9585,6 +10583,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9617,6 +10619,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9654,6 +10660,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9692,6 +10702,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9730,6 +10744,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9788,6 +10806,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9845,6 +10867,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9883,6 +10909,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9918,6 +10948,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9954,6 +10988,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -9991,6 +11029,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -10040,6 +11082,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -10075,6 +11121,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -10110,6 +11160,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -10146,6 +11200,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -10181,6 +11239,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -10216,6 +11278,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -10251,6 +11317,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -10318,6 +11388,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -10354,6 +11428,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -10387,6 +11465,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -10423,6 +11505,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
   PRIVATE third_party/googletest/include
   PRIVATE third_party/googletest
@@ -10458,6 +11544,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10483,6 +11573,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10512,6 +11606,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10541,6 +11639,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10570,6 +11672,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10599,6 +11705,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10628,6 +11738,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10657,6 +11771,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10686,6 +11804,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10715,6 +11837,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10744,6 +11870,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10774,6 +11904,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10804,6 +11938,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10832,6 +11970,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10860,6 +12002,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10888,6 +12034,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10917,6 +12067,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10946,6 +12100,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -10975,6 +12133,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11004,6 +12166,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11032,6 +12198,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11060,6 +12230,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11088,6 +12262,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11116,6 +12294,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11144,6 +12326,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11172,6 +12358,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11200,6 +12390,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11228,6 +12422,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11256,6 +12454,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11284,6 +12486,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11313,6 +12519,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11342,6 +12552,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11370,6 +12584,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11399,6 +12617,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11428,6 +12650,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11457,6 +12683,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11486,6 +12716,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11514,6 +12748,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11542,6 +12780,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11570,6 +12812,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11598,6 +12844,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11626,6 +12876,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11654,6 +12908,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11683,6 +12941,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11713,6 +12975,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11741,6 +13007,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11769,6 +13039,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11797,6 +13071,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11825,6 +13103,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11853,6 +13135,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11881,6 +13167,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11909,6 +13199,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11937,6 +13231,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11965,6 +13263,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -11993,6 +13295,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -12021,6 +13327,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
@@ -12049,6 +13359,10 @@
   PRIVATE ${BENCHMARK_ROOT_DIR}/include
   PRIVATE ${ZLIB_ROOT_DIR}
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
 )
 
diff --git a/INSTALL.md b/INSTALL.md
index 24f088e..89f2f11 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -1,4 +1,4 @@
-#If you are in a hurry
+# If you are in a hurry
 
 For language-specific installation instructions for gRPC runtime, please
 refer to these documents
@@ -14,15 +14,15 @@
  * [Ruby](src/ruby): `gem install grpc`
 
 
-#Pre-requisites
+# Pre-requisites
 
-##Linux
+## Linux
 
 ```sh
  $ [sudo] apt-get install build-essential autoconf libtool
 ```
 
-##Mac OSX
+## Mac OSX
 
 For a Mac system, git is not available by default. You will first need to
 install Xcode from the Mac AppStore and then run the following command from a
@@ -32,7 +32,7 @@
  $ [sudo] xcode-select --install
 ```
 
-##Protoc
+## Protoc
 
 By default gRPC uses [protocol buffers](https://github.com/google/protobuf),
 you will need the `protoc` compiler to generate stub server and client code.
@@ -43,7 +43,7 @@
 installed.
 
 
-#Build from Source
+# Build from Source
 
 For developers who are interested to contribute, here is how to compile the
 gRPC C Core library.
@@ -56,16 +56,16 @@
  $ [sudo] make install
 ```
 
-##Windows
+## Windows
 
 There are several ways to build under Windows, of varying complexity depending
 on experience with the tools involved.
 
-###Pre-generated Visual Studio solution
+### Pre-generated Visual Studio solution
 
 The pre-generated VS projects & solution are checked into the repository under the [vsprojects](/vsprojects) directory.
-  
-###Building using CMake (with BoringSSL)
+
+### Building using CMake (with BoringSSL)
 - Install [CMake](https://cmake.org/download/).
 - Install [Active State Perl](http://www.activestate.com/activeperl/) (`choco install activeperl`)
 - Install [Ninja](https://ninja-build.org/) (`choco install ninja`)
@@ -81,14 +81,14 @@
 ```
 NOTE: Currently you can only use Ninja to build using cmake on Windows (because of the boringssl dependency).
 
-###msys2 (with mingw)
+### msys2 (with mingw)
 
 The Makefile (and source code) should support msys2's mingw32 and mingw64
 compilers. Building with msys2's native compiler is also possible, but
 difficult.
 
 This approach requires having [msys2](https://msys2.github.io/) installed.
-  
+
 ```
 # Install prerequisites
 MSYS2$ pacman -S autoconf automake gcc libtool mingw-w64-x86_64-toolchain perl pkg-config zlib
diff --git a/Makefile b/Makefile
index 7b1a87f..bfc43aa 100644
--- a/Makefile
+++ b/Makefile
@@ -465,7 +465,7 @@
 SHARED_VERSION_CPP = -1
 SHARED_VERSION_CSHARP = -1
 else ifeq ($(SYSTEM),Darwin)
-EXECUTABLE_SUFFIX = 
+EXECUTABLE_SUFFIX =
 SHARED_EXT_CORE = dylib
 SHARED_EXT_CPP = dylib
 SHARED_EXT_CSHARP = dylib
@@ -474,7 +474,7 @@
 SHARED_VERSION_CPP =
 SHARED_VERSION_CSHARP =
 else
-EXECUTABLE_SUFFIX = 
+EXECUTABLE_SUFFIX =
 SHARED_EXT_CORE = so.$(CORE_VERSION)
 SHARED_EXT_CPP = so.$(CPP_VERSION)
 SHARED_EXT_CSHARP = so.$(CSHARP_VERSION)
@@ -495,6 +495,7 @@
 OPENSSL_NPN_CHECK_CMD = $(PKG_CONFIG) --atleast-version=1.0.1 openssl
 ZLIB_CHECK_CMD = $(PKG_CONFIG) --exists zlib
 PROTOBUF_CHECK_CMD = $(PKG_CONFIG) --atleast-version=3.0.0 protobuf
+CARES_CHECK_CMD = $(PKG_CONFIG) --exists libcares
 else # HAS_PKG_CONFIG
 
 ifeq ($(SYSTEM),MINGW32)
@@ -508,6 +509,7 @@
 BORINGSSL_COMPILE_CHECK_CMD = $(CC) $(CPPFLAGS) -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-unknown-pragmas -Wno-implicit-function-declaration -Wno-unused-variable -Wno-sign-compare $(NO_W_EXTRA_SEMI) -o $(TMPOUT) test/build/boringssl.c $(LDFLAGS)
 ZLIB_CHECK_CMD = $(CC) $(CPPFLAGS) $(CFLAGS) -o $(TMPOUT) test/build/zlib.c -lz $(LDFLAGS)
 PROTOBUF_CHECK_CMD = $(CXX) $(CPPFLAGS) $(CXXFLAGS) -o $(TMPOUT) test/build/protobuf.cc -lprotobuf $(LDFLAGS)
+CARES_CHECK_CMD = $(CXX) $(CPPFLAGS) $(CXXFLAGS) -o $(TMPOUT) test/build/c-ares.c -lcares $(LDFLAGS)
 
 endif # HAS_PKG_CONFIG
 
@@ -547,12 +549,17 @@
 ifeq ($(HAS_SYSTEM_PROTOBUF),true)
 CACHE_MK += HAS_SYSTEM_PROTOBUF = true,
 endif
+HAS_SYSTEM_CARES ?=  $(shell $(CARES_CHECK_CMD) 2> /dev/null && echo true || echo false)
+ifeq ($(HAS_SYSTEM_CARES),true)
+CACHE_MK += HAS_SYSTEM_CARES = true,
+endif
 else
 # override system libraries if the config requires a custom compiled library
 HAS_SYSTEM_OPENSSL_ALPN = false
 HAS_SYSTEM_OPENSSL_NPN = false
 HAS_SYSTEM_ZLIB = false
 HAS_SYSTEM_PROTOBUF = false
+HAS_SYSTEM_CARES = false
 endif
 
 HAS_PROTOC ?= $(shell $(PROTOC_CHECK_CMD) 2> /dev/null && echo true || echo false)
@@ -611,6 +618,12 @@
 HAS_EMBEDDED_PROTOBUF = true
 endif
 
+ifeq ($(wildcard third_party/cares/cares/ares.h),)
+HAS_EMBEDDED_CARES = false
+else
+HAS_EMBEDDED_CARES = true
+endif
+
 PC_REQUIRES_GRPC =
 PC_LIBS_GRPC =
 
@@ -643,6 +656,37 @@
 endif
 endif
 
+CARES_PKG_CONFIG = false
+
+ifeq ($(HAS_SYSTEM_CARES),false)
+ifeq ($(HAS_EMBEDDED_CARES), true)
+EMBED_CARES ?= true
+else
+DEP_MISSING += cares
+EMBED_CARES ?= broken
+endif
+else
+EMBED_CARES ?= false
+endif
+
+ifeq ($(EMBED_CARES),true)
+CARES_DEP = $(LIBDIR)/$(CONFIG)/libares.a
+CARES_MERGE_OBJS = $(LIBARES_OBJS)
+CARES_MERGE_LIBS = $(LIBDIR)/$(CONFIG)/libares.a
+CPPFLAGS := -Ithird_party/cares -Ithird_party/cares/cares $(CPPFLAGS)
+LDFLAGS := -L$(LIBDIR)/$(CONFIG)/c-ares $(LDFLAGS)
+else
+ifeq ($(HAS_PKG_CONFIG),true)
+PC_REQUIRES_GRPC += libcares
+CPPFLAGS += $(shell $(PKG_CONFIG) --cflags libcares)
+LDFLAGS += $(shell $(PKG_CONFIG) --libs-only-L libcares)
+LIBS += $(patsubst -l%,%,$(shell $(PKG_CONFIG) --libs-only-l libcares))
+else
+PC_LIBS_GRPC += -lcares
+LIBS += cares
+endif
+endif
+
 OPENSSL_PKG_CONFIG = false
 
 PC_REQUIRES_SECURE =
@@ -1231,6 +1275,7 @@
 	$(PERFTOOLS_CHECK_CMD) || true
 	$(PROTOBUF_CHECK_CMD) || true
 	$(PROTOC_CHECK_VERSION_CMD) || true
+	$(CARES_CHECK_CMD) || true
 
 third_party/protobuf/configure:
 	$(E) "[AUTOGEN] Preparing protobuf"
@@ -1265,7 +1310,7 @@
 
 privatelibs: privatelibs_c privatelibs_cxx
 
-privatelibs_c:  $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libreconnect_server.a $(LIBDIR)/$(CONFIG)/libtest_tcp_server.a $(LIBDIR)/$(CONFIG)/libz.a $(LIBDIR)/$(CONFIG)/libbad_client_test.a $(LIBDIR)/$(CONFIG)/libbad_ssl_test_server.a $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a
+privatelibs_c:  $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libreconnect_server.a $(LIBDIR)/$(CONFIG)/libtest_tcp_server.a $(LIBDIR)/$(CONFIG)/libz.a $(LIBDIR)/$(CONFIG)/libares.a $(LIBDIR)/$(CONFIG)/libbad_client_test.a $(LIBDIR)/$(CONFIG)/libbad_ssl_test_server.a $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a
 pc_c: $(LIBDIR)/$(CONFIG)/pkgconfig/grpc.pc
 
 pc_c_unsecure: $(LIBDIR)/$(CONFIG)/pkgconfig/grpc_unsecure.pc
@@ -2696,7 +2741,7 @@
 LIBGPR_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGPR_SRC))))
 
 
-$(LIBDIR)/$(CONFIG)/libgpr.a: $(ZLIB_DEP)  $(LIBGPR_OBJS) 
+$(LIBDIR)/$(CONFIG)/libgpr.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBGPR_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgpr.a
@@ -2708,18 +2753,18 @@
 
 
 ifeq ($(SYSTEM),MINGW32)
-$(LIBDIR)/$(CONFIG)/gpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGPR_OBJS)  $(ZLIB_DEP)
+$(LIBDIR)/$(CONFIG)/gpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGPR_OBJS)  $(ZLIB_DEP) $(CARES_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/gpr$(SHARED_VERSION_CORE).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgpr$(SHARED_VERSION_CORE)-dll.a -o $(LIBDIR)/$(CONFIG)/gpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGPR_OBJS) $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/gpr$(SHARED_VERSION_CORE).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgpr$(SHARED_VERSION_CORE)-dll.a -o $(LIBDIR)/$(CONFIG)/gpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGPR_OBJS) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 else
-$(LIBDIR)/$(CONFIG)/libgpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGPR_OBJS)  $(ZLIB_DEP)
+$(LIBDIR)/$(CONFIG)/libgpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGPR_OBJS)  $(ZLIB_DEP) $(CARES_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
 ifeq ($(SYSTEM),Darwin)
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)gpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGPR_OBJS) $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)gpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGPR_OBJS) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 else
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgpr.so.3 -o $(LIBDIR)/$(CONFIG)/libgpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGPR_OBJS) $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgpr.so.3 -o $(LIBDIR)/$(CONFIG)/libgpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGPR_OBJS) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 	$(Q) ln -sf $(SHARED_PREFIX)gpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/libgpr$(SHARED_VERSION_CORE).so.3
 	$(Q) ln -sf $(SHARED_PREFIX)gpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/libgpr$(SHARED_VERSION_CORE).so
 endif
@@ -2738,7 +2783,7 @@
 LIBGPR_TEST_UTIL_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGPR_TEST_UTIL_SRC))))
 
 
-$(LIBDIR)/$(CONFIG)/libgpr_test_util.a: $(ZLIB_DEP)  $(LIBGPR_TEST_UTIL_OBJS) 
+$(LIBDIR)/$(CONFIG)/libgpr_test_util.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBGPR_TEST_UTIL_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgpr_test_util.a
@@ -2804,6 +2849,7 @@
     src/core/lib/iomgr/resolve_address_windows.c \
     src/core/lib/iomgr/resource_quota.c \
     src/core/lib/iomgr/sockaddr_utils.c \
+    src/core/lib/iomgr/socket_factory_posix.c \
     src/core/lib/iomgr/socket_mutator.c \
     src/core/lib/iomgr/socket_utils_common_posix.c \
     src/core/lib/iomgr/socket_utils_linux.c \
@@ -2841,6 +2887,7 @@
     src/core/lib/json/json_reader.c \
     src/core/lib/json/json_string.c \
     src/core/lib/json/json_writer.c \
+    src/core/lib/security/util/b64.c \
     src/core/lib/slice/percent_encoding.c \
     src/core/lib/slice/slice.c \
     src/core/lib/slice/slice_buffer.c \
@@ -2859,6 +2906,7 @@
     src/core/lib/surface/channel_ping.c \
     src/core/lib/surface/channel_stack_type.c \
     src/core/lib/surface/completion_queue.c \
+    src/core/lib/surface/completion_queue_factory.c \
     src/core/lib/surface/event_string.c \
     src/core/lib/surface/lame_client.c \
     src/core/lib/surface/metadata_array.c \
@@ -2922,7 +2970,6 @@
     src/core/lib/security/transport/security_handshaker.c \
     src/core/lib/security/transport/server_auth_filter.c \
     src/core/lib/security/transport/tsi_error.c \
-    src/core/lib/security/util/b64.c \
     src/core/lib/security/util/json_util.c \
     src/core/lib/surface/init_secure.c \
     src/core/lib/tsi/fake_transport_security.c \
@@ -2964,6 +3011,9 @@
     third_party/nanopb/pb_encode.c \
     src/core/ext/lb_policy/pick_first/pick_first.c \
     src/core/ext/lb_policy/round_robin/round_robin.c \
+    src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c \
+    src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c \
+    src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c \
     src/core/ext/resolver/dns/native/dns_resolver.c \
     src/core/ext/resolver/sockaddr/sockaddr_resolver.c \
     src/core/ext/load_reporting/load_reporting.c \
@@ -3031,11 +3081,11 @@
 else
 
 
-$(LIBDIR)/$(CONFIG)/libgrpc.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBGRPC_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
+$(LIBDIR)/$(CONFIG)/libgrpc.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBGRPC_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(CARES_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc.a
-	$(Q) $(AR) $(AROPTS) $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBGRPC_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
+	$(Q) $(AR) $(AROPTS) $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBGRPC_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(CARES_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
 ifeq ($(SYSTEM),Darwin)
 	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc.a
 endif
@@ -3043,18 +3093,18 @@
 
 
 ifeq ($(SYSTEM),MINGW32)
-$(LIBDIR)/$(CONFIG)/grpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGRPC_OBJS)  $(ZLIB_DEP) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_DEP)
+$(LIBDIR)/$(CONFIG)/grpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGRPC_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc$(SHARED_VERSION_CORE).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc$(SHARED_VERSION_CORE)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc$(SHARED_VERSION_CORE).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc$(SHARED_VERSION_CORE)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 else
-$(LIBDIR)/$(CONFIG)/libgrpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGRPC_OBJS)  $(ZLIB_DEP) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_DEP)
+$(LIBDIR)/$(CONFIG)/libgrpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGRPC_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
 ifeq ($(SYSTEM),Darwin)
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 else
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 	$(Q) ln -sf $(SHARED_PREFIX)grpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/libgrpc$(SHARED_VERSION_CORE).so.3
 	$(Q) ln -sf $(SHARED_PREFIX)grpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/libgrpc$(SHARED_VERSION_CORE).so
 endif
@@ -3118,6 +3168,7 @@
     src/core/lib/iomgr/resolve_address_windows.c \
     src/core/lib/iomgr/resource_quota.c \
     src/core/lib/iomgr/sockaddr_utils.c \
+    src/core/lib/iomgr/socket_factory_posix.c \
     src/core/lib/iomgr/socket_mutator.c \
     src/core/lib/iomgr/socket_utils_common_posix.c \
     src/core/lib/iomgr/socket_utils_linux.c \
@@ -3155,6 +3206,7 @@
     src/core/lib/json/json_reader.c \
     src/core/lib/json/json_string.c \
     src/core/lib/json/json_writer.c \
+    src/core/lib/security/util/b64.c \
     src/core/lib/slice/percent_encoding.c \
     src/core/lib/slice/slice.c \
     src/core/lib/slice/slice_buffer.c \
@@ -3173,6 +3225,7 @@
     src/core/lib/surface/channel_ping.c \
     src/core/lib/surface/channel_stack_type.c \
     src/core/lib/surface/completion_queue.c \
+    src/core/lib/surface/completion_queue_factory.c \
     src/core/lib/surface/event_string.c \
     src/core/lib/surface/lame_client.c \
     src/core/lib/surface/metadata_array.c \
@@ -3259,7 +3312,6 @@
     src/core/lib/security/transport/security_handshaker.c \
     src/core/lib/security/transport/server_auth_filter.c \
     src/core/lib/security/transport/tsi_error.c \
-    src/core/lib/security/util/b64.c \
     src/core/lib/security/util/json_util.c \
     src/core/lib/surface/init_secure.c \
     src/core/lib/tsi/fake_transport_security.c \
@@ -3317,11 +3369,11 @@
 else
 
 
-$(LIBDIR)/$(CONFIG)/libgrpc_cronet.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBGRPC_CRONET_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
+$(LIBDIR)/$(CONFIG)/libgrpc_cronet.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBGRPC_CRONET_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(CARES_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_cronet.a
-	$(Q) $(AR) $(AROPTS) $(LIBDIR)/$(CONFIG)/libgrpc_cronet.a $(LIBGRPC_CRONET_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
+	$(Q) $(AR) $(AROPTS) $(LIBDIR)/$(CONFIG)/libgrpc_cronet.a $(LIBGRPC_CRONET_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(CARES_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
 ifeq ($(SYSTEM),Darwin)
 	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc_cronet.a
 endif
@@ -3329,18 +3381,18 @@
 
 
 ifeq ($(SYSTEM),MINGW32)
-$(LIBDIR)/$(CONFIG)/grpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGRPC_CRONET_OBJS)  $(ZLIB_DEP) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_DEP)
+$(LIBDIR)/$(CONFIG)/grpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGRPC_CRONET_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc_cronet$(SHARED_VERSION_CORE).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION_CORE)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_CRONET_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc_cronet$(SHARED_VERSION_CORE).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION_CORE)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_CRONET_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 else
-$(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGRPC_CRONET_OBJS)  $(ZLIB_DEP) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_DEP)
+$(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGRPC_CRONET_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
 ifeq ($(SYSTEM),Darwin)
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_CRONET_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_CRONET_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 else
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc_cronet.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_CRONET_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc_cronet.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_CRONET_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 	$(Q) ln -sf $(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION_CORE).so.3
 	$(Q) ln -sf $(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION_CORE).so
 endif
@@ -3423,6 +3475,7 @@
     src/core/lib/iomgr/resolve_address_windows.c \
     src/core/lib/iomgr/resource_quota.c \
     src/core/lib/iomgr/sockaddr_utils.c \
+    src/core/lib/iomgr/socket_factory_posix.c \
     src/core/lib/iomgr/socket_mutator.c \
     src/core/lib/iomgr/socket_utils_common_posix.c \
     src/core/lib/iomgr/socket_utils_linux.c \
@@ -3460,6 +3513,7 @@
     src/core/lib/json/json_reader.c \
     src/core/lib/json/json_string.c \
     src/core/lib/json/json_writer.c \
+    src/core/lib/security/util/b64.c \
     src/core/lib/slice/percent_encoding.c \
     src/core/lib/slice/slice.c \
     src/core/lib/slice/slice_buffer.c \
@@ -3478,6 +3532,7 @@
     src/core/lib/surface/channel_ping.c \
     src/core/lib/surface/channel_stack_type.c \
     src/core/lib/surface/completion_queue.c \
+    src/core/lib/surface/completion_queue_factory.c \
     src/core/lib/surface/event_string.c \
     src/core/lib/surface/lame_client.c \
     src/core/lib/surface/metadata_array.c \
@@ -3585,7 +3640,7 @@
 LIBGRPC_TEST_UTIL_UNSECURE_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC_TEST_UTIL_UNSECURE_SRC))))
 
 
-$(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a: $(ZLIB_DEP)  $(LIBGRPC_TEST_UTIL_UNSECURE_OBJS) 
+$(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBGRPC_TEST_UTIL_UNSECURE_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a
@@ -3652,6 +3707,7 @@
     src/core/lib/iomgr/resolve_address_windows.c \
     src/core/lib/iomgr/resource_quota.c \
     src/core/lib/iomgr/sockaddr_utils.c \
+    src/core/lib/iomgr/socket_factory_posix.c \
     src/core/lib/iomgr/socket_mutator.c \
     src/core/lib/iomgr/socket_utils_common_posix.c \
     src/core/lib/iomgr/socket_utils_linux.c \
@@ -3689,6 +3745,7 @@
     src/core/lib/json/json_reader.c \
     src/core/lib/json/json_string.c \
     src/core/lib/json/json_writer.c \
+    src/core/lib/security/util/b64.c \
     src/core/lib/slice/percent_encoding.c \
     src/core/lib/slice/slice.c \
     src/core/lib/slice/slice_buffer.c \
@@ -3707,6 +3764,7 @@
     src/core/lib/surface/channel_ping.c \
     src/core/lib/surface/channel_stack_type.c \
     src/core/lib/surface/completion_queue.c \
+    src/core/lib/surface/completion_queue_factory.c \
     src/core/lib/surface/event_string.c \
     src/core/lib/surface/lame_client.c \
     src/core/lib/surface/metadata_array.c \
@@ -3773,6 +3831,9 @@
     src/core/ext/client_channel/subchannel.c \
     src/core/ext/client_channel/subchannel_index.c \
     src/core/ext/client_channel/uri_parser.c \
+    src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c \
+    src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c \
+    src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c \
     src/core/ext/resolver/dns/native/dns_resolver.c \
     src/core/ext/resolver/sockaddr/sockaddr_resolver.c \
     src/core/ext/load_reporting/load_reporting.c \
@@ -3837,11 +3898,11 @@
 LIBGRPC_UNSECURE_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC_UNSECURE_SRC))))
 
 
-$(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a: $(ZLIB_DEP)  $(LIBGRPC_UNSECURE_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS) 
+$(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBGRPC_UNSECURE_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(CARES_MERGE_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a
-	$(Q) $(AR) $(AROPTS) $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBGRPC_UNSECURE_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS) 
+	$(Q) $(AR) $(AROPTS) $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBGRPC_UNSECURE_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(CARES_MERGE_OBJS) 
 ifeq ($(SYSTEM),Darwin)
 	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a
 endif
@@ -3849,18 +3910,18 @@
 
 
 ifeq ($(SYSTEM),MINGW32)
-$(LIBDIR)/$(CONFIG)/grpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGRPC_UNSECURE_OBJS)  $(ZLIB_DEP) $(LIBDIR)/$(CONFIG)/libgpr.a
+$(LIBDIR)/$(CONFIG)/grpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGRPC_UNSECURE_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc_unsecure$(SHARED_VERSION_CORE).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc_unsecure$(SHARED_VERSION_CORE)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_UNSECURE_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc_unsecure$(SHARED_VERSION_CORE).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc_unsecure$(SHARED_VERSION_CORE)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_UNSECURE_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 else
-$(LIBDIR)/$(CONFIG)/libgrpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGRPC_UNSECURE_OBJS)  $(ZLIB_DEP) $(LIBDIR)/$(CONFIG)/libgpr.a
+$(LIBDIR)/$(CONFIG)/libgrpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE): $(LIBGRPC_UNSECURE_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
 ifeq ($(SYSTEM),Darwin)
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_UNSECURE_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_UNSECURE_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 else
-	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc_unsecure.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_UNSECURE_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc_unsecure.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBGRPC_UNSECURE_OBJS) $(LIBDIR)/$(CONFIG)/libgpr.a $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 	$(Q) ln -sf $(SHARED_PREFIX)grpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/libgrpc_unsecure$(SHARED_VERSION_CORE).so.3
 	$(Q) ln -sf $(SHARED_PREFIX)grpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/libgrpc_unsecure$(SHARED_VERSION_CORE).so
 endif
@@ -4114,11 +4175,11 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libgrpc++.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PROTOBUF_DEP) $(LIBGRPC++_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS) 
+$(LIBDIR)/$(CONFIG)/libgrpc++.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PROTOBUF_DEP) $(LIBGRPC++_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(CARES_MERGE_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc++.a
-	$(Q) $(AR) $(AROPTS) $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBGRPC++_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS) 
+	$(Q) $(AR) $(AROPTS) $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBGRPC++_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(CARES_MERGE_OBJS) 
 ifeq ($(SYSTEM),Darwin)
 	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc++.a
 endif
@@ -4126,18 +4187,18 @@
 
 
 ifeq ($(SYSTEM),MINGW32)
-$(LIBDIR)/$(CONFIG)/grpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_OBJS)  $(ZLIB_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/grpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(OPENSSL_DEP)
+$(LIBDIR)/$(CONFIG)/grpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/grpc$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(OPENSSL_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc++$(SHARED_VERSION_CPP).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc++$(SHARED_VERSION_CPP)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_OBJS) $(ZLIB_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgrpc$(SHARED_VERSION_CORE)-dll
+	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc++$(SHARED_VERSION_CPP).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc++$(SHARED_VERSION_CPP)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_OBJS) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgrpc$(SHARED_VERSION_CORE)-dll
 else
-$(LIBDIR)/$(CONFIG)/libgrpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_OBJS)  $(ZLIB_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/libgrpc.$(SHARED_EXT_CORE) $(OPENSSL_DEP)
+$(LIBDIR)/$(CONFIG)/libgrpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/libgrpc.$(SHARED_EXT_CORE) $(OPENSSL_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
 ifeq ($(SYSTEM),Darwin)
-	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_OBJS) $(ZLIB_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgrpc
+	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_OBJS) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgrpc
 else
-	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc++.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_OBJS) $(ZLIB_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgrpc
+	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc++.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_OBJS) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgrpc
 	$(Q) ln -sf $(SHARED_PREFIX)grpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBDIR)/$(CONFIG)/libgrpc++$(SHARED_VERSION_CPP).so.1
 	$(Q) ln -sf $(SHARED_PREFIX)grpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBDIR)/$(CONFIG)/libgrpc++$(SHARED_VERSION_CPP).so
 endif
@@ -4263,6 +4324,7 @@
     src/core/lib/iomgr/resolve_address_windows.c \
     src/core/lib/iomgr/resource_quota.c \
     src/core/lib/iomgr/sockaddr_utils.c \
+    src/core/lib/iomgr/socket_factory_posix.c \
     src/core/lib/iomgr/socket_mutator.c \
     src/core/lib/iomgr/socket_utils_common_posix.c \
     src/core/lib/iomgr/socket_utils_linux.c \
@@ -4300,6 +4362,7 @@
     src/core/lib/json/json_reader.c \
     src/core/lib/json/json_string.c \
     src/core/lib/json/json_writer.c \
+    src/core/lib/security/util/b64.c \
     src/core/lib/slice/percent_encoding.c \
     src/core/lib/slice/slice.c \
     src/core/lib/slice/slice_buffer.c \
@@ -4318,6 +4381,7 @@
     src/core/lib/surface/channel_ping.c \
     src/core/lib/surface/channel_stack_type.c \
     src/core/lib/surface/completion_queue.c \
+    src/core/lib/surface/completion_queue_factory.c \
     src/core/lib/surface/event_string.c \
     src/core/lib/surface/lame_client.c \
     src/core/lib/surface/metadata_array.c \
@@ -4509,11 +4573,11 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libgrpc++_cronet.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PROTOBUF_DEP) $(LIBGRPC++_CRONET_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
+$(LIBDIR)/$(CONFIG)/libgrpc++_cronet.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PROTOBUF_DEP) $(LIBGRPC++_CRONET_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(CARES_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc++_cronet.a
-	$(Q) $(AR) $(AROPTS) $(LIBDIR)/$(CONFIG)/libgrpc++_cronet.a $(LIBGRPC++_CRONET_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
+	$(Q) $(AR) $(AROPTS) $(LIBDIR)/$(CONFIG)/libgrpc++_cronet.a $(LIBGRPC++_CRONET_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(CARES_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
 ifeq ($(SYSTEM),Darwin)
 	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc++_cronet.a
 endif
@@ -4521,18 +4585,18 @@
 
 
 ifeq ($(SYSTEM),MINGW32)
-$(LIBDIR)/$(CONFIG)/grpc++_cronet$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_CRONET_OBJS)  $(ZLIB_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/gpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/grpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(OPENSSL_DEP)
+$(LIBDIR)/$(CONFIG)/grpc++_cronet$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_CRONET_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/gpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/grpc_cronet$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(OPENSSL_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc++_cronet$(SHARED_VERSION_CPP).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc++_cronet$(SHARED_VERSION_CPP)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc++_cronet$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_CRONET_OBJS) $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgpr$(SHARED_VERSION_CORE)-dll -lgrpc_cronet$(SHARED_VERSION_CORE)-dll
+	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc++_cronet$(SHARED_VERSION_CPP).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc++_cronet$(SHARED_VERSION_CPP)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc++_cronet$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_CRONET_OBJS) $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgpr$(SHARED_VERSION_CORE)-dll -lgrpc_cronet$(SHARED_VERSION_CORE)-dll
 else
-$(LIBDIR)/$(CONFIG)/libgrpc++_cronet$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_CRONET_OBJS)  $(ZLIB_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/libgpr.$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/libgrpc_cronet.$(SHARED_EXT_CORE) $(OPENSSL_DEP)
+$(LIBDIR)/$(CONFIG)/libgrpc++_cronet$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_CRONET_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/libgpr.$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/libgrpc_cronet.$(SHARED_EXT_CORE) $(OPENSSL_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
 ifeq ($(SYSTEM),Darwin)
-	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc++_cronet$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc++_cronet$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_CRONET_OBJS) $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgpr -lgrpc_cronet
+	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc++_cronet$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc++_cronet$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_CRONET_OBJS) $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgpr -lgrpc_cronet
 else
-	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc++_cronet.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc++_cronet$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_CRONET_OBJS) $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgpr -lgrpc_cronet
+	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc++_cronet.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc++_cronet$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_CRONET_OBJS) $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgpr -lgrpc_cronet
 	$(Q) ln -sf $(SHARED_PREFIX)grpc++_cronet$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBDIR)/$(CONFIG)/libgrpc++_cronet$(SHARED_VERSION_CPP).so.1
 	$(Q) ln -sf $(SHARED_PREFIX)grpc++_cronet$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBDIR)/$(CONFIG)/libgrpc++_cronet$(SHARED_VERSION_CPP).so
 endif
@@ -4644,18 +4708,18 @@
 
 
 ifeq ($(SYSTEM),MINGW32)
-$(LIBDIR)/$(CONFIG)/grpc++_reflection$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_REFLECTION_OBJS)  $(ZLIB_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/grpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(OPENSSL_DEP)
+$(LIBDIR)/$(CONFIG)/grpc++_reflection$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_REFLECTION_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/grpc++$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(OPENSSL_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc++_reflection$(SHARED_VERSION_CPP).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc++_reflection$(SHARED_VERSION_CPP)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc++_reflection$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_REFLECTION_OBJS) $(ZLIB_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgrpc++$(SHARED_VERSION_CPP)-dll
+	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc++_reflection$(SHARED_VERSION_CPP).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc++_reflection$(SHARED_VERSION_CPP)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc++_reflection$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_REFLECTION_OBJS) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgrpc++$(SHARED_VERSION_CPP)-dll
 else
-$(LIBDIR)/$(CONFIG)/libgrpc++_reflection$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_REFLECTION_OBJS)  $(ZLIB_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/libgrpc++.$(SHARED_EXT_CPP) $(OPENSSL_DEP)
+$(LIBDIR)/$(CONFIG)/libgrpc++_reflection$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_REFLECTION_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/libgrpc++.$(SHARED_EXT_CPP) $(OPENSSL_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
 ifeq ($(SYSTEM),Darwin)
-	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc++_reflection$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc++_reflection$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_REFLECTION_OBJS) $(ZLIB_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgrpc++
+	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc++_reflection$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc++_reflection$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_REFLECTION_OBJS) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgrpc++
 else
-	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc++_reflection.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc++_reflection$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_REFLECTION_OBJS) $(ZLIB_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgrpc++
+	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc++_reflection.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc++_reflection$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_REFLECTION_OBJS) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgrpc++
 	$(Q) ln -sf $(SHARED_PREFIX)grpc++_reflection$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBDIR)/$(CONFIG)/libgrpc++_reflection$(SHARED_VERSION_CPP).so.1
 	$(Q) ln -sf $(SHARED_PREFIX)grpc++_reflection$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBDIR)/$(CONFIG)/libgrpc++_reflection$(SHARED_VERSION_CPP).so
 endif
@@ -4990,11 +5054,11 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBGRPC++_UNSECURE_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS) 
+$(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBGRPC++_UNSECURE_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(CARES_MERGE_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a
-	$(Q) $(AR) $(AROPTS) $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a $(LIBGRPC++_UNSECURE_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS) 
+	$(Q) $(AR) $(AROPTS) $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a $(LIBGRPC++_UNSECURE_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(CARES_MERGE_OBJS) 
 ifeq ($(SYSTEM),Darwin)
 	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a
 endif
@@ -5002,18 +5066,18 @@
 
 
 ifeq ($(SYSTEM),MINGW32)
-$(LIBDIR)/$(CONFIG)/grpc++_unsecure$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_UNSECURE_OBJS)  $(ZLIB_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/gpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/grpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE)
+$(LIBDIR)/$(CONFIG)/grpc++_unsecure$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_UNSECURE_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/gpr$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/grpc_unsecure$(SHARED_VERSION_CORE).$(SHARED_EXT_CORE)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc++_unsecure$(SHARED_VERSION_CPP).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc++_unsecure$(SHARED_VERSION_CPP)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc++_unsecure$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_UNSECURE_OBJS) $(ZLIB_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgpr$(SHARED_VERSION_CORE)-dll -lgrpc_unsecure$(SHARED_VERSION_CORE)-dll
+	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc++_unsecure$(SHARED_VERSION_CPP).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc++_unsecure$(SHARED_VERSION_CPP)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc++_unsecure$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_UNSECURE_OBJS) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgpr$(SHARED_VERSION_CORE)-dll -lgrpc_unsecure$(SHARED_VERSION_CORE)-dll
 else
-$(LIBDIR)/$(CONFIG)/libgrpc++_unsecure$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_UNSECURE_OBJS)  $(ZLIB_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/libgpr.$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.$(SHARED_EXT_CORE)
+$(LIBDIR)/$(CONFIG)/libgrpc++_unsecure$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP): $(LIBGRPC++_UNSECURE_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(PROTOBUF_DEP) $(LIBDIR)/$(CONFIG)/libgpr.$(SHARED_EXT_CORE) $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.$(SHARED_EXT_CORE)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
 ifeq ($(SYSTEM),Darwin)
-	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc++_unsecure$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_UNSECURE_OBJS) $(ZLIB_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgpr -lgrpc_unsecure
+	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc++_unsecure$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_UNSECURE_OBJS) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgpr -lgrpc_unsecure
 else
-	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc++_unsecure.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_UNSECURE_OBJS) $(ZLIB_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgpr -lgrpc_unsecure
+	$(Q) $(LDXX) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc++_unsecure.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBGRPC++_UNSECURE_OBJS) $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) -lgpr -lgrpc_unsecure
 	$(Q) ln -sf $(SHARED_PREFIX)grpc++_unsecure$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure$(SHARED_VERSION_CPP).so.1
 	$(Q) ln -sf $(SHARED_PREFIX)grpc++_unsecure$(SHARED_VERSION_CPP).$(SHARED_EXT_CPP) $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure$(SHARED_VERSION_CPP).so
 endif
@@ -5159,7 +5223,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libgrpc_plugin_support.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBGRPC_PLUGIN_SUPPORT_OBJS) 
+$(LIBDIR)/$(CONFIG)/libgrpc_plugin_support.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBGRPC_PLUGIN_SUPPORT_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_plugin_support.a
@@ -5592,18 +5656,18 @@
 
 
 ifeq ($(SYSTEM),MINGW32)
-$(LIBDIR)/$(CONFIG)/grpc_csharp_ext$(SHARED_VERSION_CSHARP).$(SHARED_EXT_CSHARP): $(LIBGRPC_CSHARP_EXT_OBJS)  $(ZLIB_DEP) $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_DEP)
+$(LIBDIR)/$(CONFIG)/grpc_csharp_ext$(SHARED_VERSION_CSHARP).$(SHARED_EXT_CSHARP): $(LIBGRPC_CSHARP_EXT_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) $(if $(subst Linux,,$(SYSTEM)),,-Wl$(comma)-wrap$(comma)memcpy) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc_csharp_ext$(SHARED_VERSION_CSHARP).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION_CSHARP)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc_csharp_ext$(SHARED_VERSION_CSHARP).$(SHARED_EXT_CSHARP) $(LIBGRPC_CSHARP_EXT_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) $(if $(subst Linux,,$(SYSTEM)),,-Wl$(comma)-wrap$(comma)memcpy) -L$(LIBDIR)/$(CONFIG) -shared -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc_csharp_ext$(SHARED_VERSION_CSHARP).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION_CSHARP)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc_csharp_ext$(SHARED_VERSION_CSHARP).$(SHARED_EXT_CSHARP) $(LIBGRPC_CSHARP_EXT_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 else
-$(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION_CSHARP).$(SHARED_EXT_CSHARP): $(LIBGRPC_CSHARP_EXT_OBJS)  $(ZLIB_DEP) $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_DEP)
+$(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION_CSHARP).$(SHARED_EXT_CSHARP): $(LIBGRPC_CSHARP_EXT_OBJS)  $(ZLIB_DEP) $(CARES_DEP) $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_DEP)
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
 ifeq ($(SYSTEM),Darwin)
-	$(Q) $(LD) $(LDFLAGS) $(if $(subst Linux,,$(SYSTEM)),,-Wl$(comma)-wrap$(comma)memcpy) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc_csharp_ext$(SHARED_VERSION_CSHARP).$(SHARED_EXT_CSHARP) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION_CSHARP).$(SHARED_EXT_CSHARP) $(LIBGRPC_CSHARP_EXT_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) $(if $(subst Linux,,$(SYSTEM)),,-Wl$(comma)-wrap$(comma)memcpy) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc_csharp_ext$(SHARED_VERSION_CSHARP).$(SHARED_EXT_CSHARP) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION_CSHARP).$(SHARED_EXT_CSHARP) $(LIBGRPC_CSHARP_EXT_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 else
-	$(Q) $(LD) $(LDFLAGS) $(if $(subst Linux,,$(SYSTEM)),,-Wl$(comma)-wrap$(comma)memcpy) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc_csharp_ext.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION_CSHARP).$(SHARED_EXT_CSHARP) $(LIBGRPC_CSHARP_EXT_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(ZLIB_MERGE_LIBS) $(LDLIBS)
+	$(Q) $(LD) $(LDFLAGS) $(if $(subst Linux,,$(SYSTEM)),,-Wl$(comma)-wrap$(comma)memcpy) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc_csharp_ext.so.3 -o $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION_CSHARP).$(SHARED_EXT_CSHARP) $(LIBGRPC_CSHARP_EXT_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr.a $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS) $(LDLIBS)
 	$(Q) ln -sf $(SHARED_PREFIX)grpc_csharp_ext$(SHARED_VERSION_CSHARP).$(SHARED_EXT_CSHARP) $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION_CSHARP).so.1
 	$(Q) ln -sf $(SHARED_PREFIX)grpc_csharp_ext$(SHARED_VERSION_CSHARP).$(SHARED_EXT_CSHARP) $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext$(SHARED_VERSION_CSHARP).so
 endif
@@ -5931,7 +5995,7 @@
 $(LIBBORINGSSL_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX
 $(LIBBORINGSSL_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-unknown-pragmas -Wno-implicit-function-declaration -Wno-unused-variable -Wno-sign-compare $(NO_W_EXTRA_SEMI)
 
-$(LIBDIR)/$(CONFIG)/libboringssl.a: $(ZLIB_DEP)  $(LIBBORINGSSL_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBBORINGSSL_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl.a
@@ -5969,7 +6033,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_test_util.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_TEST_UTIL_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_test_util.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_TEST_UTIL_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_test_util.a
@@ -6007,7 +6071,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_aes_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_AES_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_aes_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_AES_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_aes_test_lib.a
@@ -6045,7 +6109,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_asn1_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ASN1_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_asn1_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ASN1_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_asn1_test_lib.a
@@ -6083,7 +6147,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_base64_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BASE64_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_base64_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BASE64_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_base64_test_lib.a
@@ -6121,7 +6185,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_bio_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BIO_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_bio_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BIO_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_bio_test_lib.a
@@ -6159,7 +6223,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_bn_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BN_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_bn_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BN_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_bn_test_lib.a
@@ -6197,7 +6261,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_bytestring_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BYTESTRING_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_bytestring_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_BYTESTRING_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_bytestring_test_lib.a
@@ -6235,7 +6299,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_chacha_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_CHACHA_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_chacha_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_CHACHA_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_chacha_test_lib.a
@@ -6273,7 +6337,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_aead_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_AEAD_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_aead_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_AEAD_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_aead_test_lib.a
@@ -6311,7 +6375,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_cipher_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_CIPHER_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_cipher_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_CIPHER_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_cipher_test_lib.a
@@ -6349,7 +6413,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_cmac_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_CMAC_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_cmac_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_CMAC_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_cmac_test_lib.a
@@ -6378,7 +6442,7 @@
 $(LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX
 $(LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-unknown-pragmas -Wno-implicit-function-declaration -Wno-unused-variable -Wno-sign-compare $(NO_W_EXTRA_SEMI)
 
-$(LIBDIR)/$(CONFIG)/libboringssl_constant_time_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_constant_time_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_constant_time_test_lib.a
@@ -6414,7 +6478,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_ed25519_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ED25519_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_ed25519_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ED25519_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ed25519_test_lib.a
@@ -6452,7 +6516,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_spake25519_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_SPAKE25519_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_spake25519_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_SPAKE25519_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_spake25519_test_lib.a
@@ -6490,7 +6554,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_x25519_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_X25519_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_x25519_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_X25519_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_x25519_test_lib.a
@@ -6528,7 +6592,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_dh_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_DH_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_dh_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_DH_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_dh_test_lib.a
@@ -6566,7 +6630,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_digest_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_DIGEST_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_digest_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_DIGEST_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_digest_test_lib.a
@@ -6595,7 +6659,7 @@
 $(LIBBORINGSSL_DSA_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX
 $(LIBBORINGSSL_DSA_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-unknown-pragmas -Wno-implicit-function-declaration -Wno-unused-variable -Wno-sign-compare $(NO_W_EXTRA_SEMI)
 
-$(LIBDIR)/$(CONFIG)/libboringssl_dsa_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_DSA_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_dsa_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBBORINGSSL_DSA_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_dsa_test_lib.a
@@ -6631,7 +6695,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_ec_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_EC_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_ec_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_EC_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ec_test_lib.a
@@ -6660,7 +6724,7 @@
 $(LIBBORINGSSL_EXAMPLE_MUL_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX
 $(LIBBORINGSSL_EXAMPLE_MUL_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-unknown-pragmas -Wno-implicit-function-declaration -Wno-unused-variable -Wno-sign-compare $(NO_W_EXTRA_SEMI)
 
-$(LIBDIR)/$(CONFIG)/libboringssl_example_mul_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_EXAMPLE_MUL_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_example_mul_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBBORINGSSL_EXAMPLE_MUL_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_example_mul_lib.a
@@ -6696,7 +6760,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_ecdh_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ECDH_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_ecdh_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ECDH_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ecdh_test_lib.a
@@ -6734,7 +6798,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_sign_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ECDSA_SIGN_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_sign_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ECDSA_SIGN_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_sign_test_lib.a
@@ -6772,7 +6836,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ECDSA_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ECDSA_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_test_lib.a
@@ -6810,7 +6874,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_verify_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ECDSA_VERIFY_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_verify_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ECDSA_VERIFY_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_verify_test_lib.a
@@ -6848,7 +6912,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_err_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ERR_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_err_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ERR_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_err_test_lib.a
@@ -6886,7 +6950,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_evp_extra_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_EVP_EXTRA_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_evp_extra_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_EVP_EXTRA_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_evp_extra_test_lib.a
@@ -6924,7 +6988,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_evp_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_EVP_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_evp_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_EVP_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_evp_test_lib.a
@@ -6962,7 +7026,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_pbkdf_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_PBKDF_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_pbkdf_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_PBKDF_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_pbkdf_test_lib.a
@@ -6991,7 +7055,7 @@
 $(LIBBORINGSSL_HKDF_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX
 $(LIBBORINGSSL_HKDF_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-unknown-pragmas -Wno-implicit-function-declaration -Wno-unused-variable -Wno-sign-compare $(NO_W_EXTRA_SEMI)
 
-$(LIBDIR)/$(CONFIG)/libboringssl_hkdf_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_HKDF_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_hkdf_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBBORINGSSL_HKDF_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_hkdf_test_lib.a
@@ -7027,7 +7091,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_hmac_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_HMAC_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_hmac_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_HMAC_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_hmac_test_lib.a
@@ -7056,7 +7120,7 @@
 $(LIBBORINGSSL_LHASH_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX
 $(LIBBORINGSSL_LHASH_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-unknown-pragmas -Wno-implicit-function-declaration -Wno-unused-variable -Wno-sign-compare $(NO_W_EXTRA_SEMI)
 
-$(LIBDIR)/$(CONFIG)/libboringssl_lhash_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_LHASH_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_lhash_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBBORINGSSL_LHASH_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_lhash_test_lib.a
@@ -7092,7 +7156,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_gcm_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_GCM_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_gcm_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_GCM_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_gcm_test_lib.a
@@ -7130,7 +7194,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_newhope_statistical_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_NEWHOPE_STATISTICAL_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_newhope_statistical_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_NEWHOPE_STATISTICAL_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_newhope_statistical_test_lib.a
@@ -7168,7 +7232,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_newhope_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_NEWHOPE_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_newhope_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_NEWHOPE_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_newhope_test_lib.a
@@ -7206,7 +7270,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_newhope_vectors_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_NEWHOPE_VECTORS_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_newhope_vectors_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_NEWHOPE_VECTORS_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_newhope_vectors_test_lib.a
@@ -7244,7 +7308,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_obj_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_OBJ_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_obj_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_OBJ_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_obj_test_lib.a
@@ -7282,7 +7346,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_pkcs12_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_PKCS12_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_pkcs12_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_PKCS12_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_pkcs12_test_lib.a
@@ -7320,7 +7384,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_pkcs8_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_PKCS8_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_pkcs8_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_PKCS8_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_pkcs8_test_lib.a
@@ -7358,7 +7422,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_poly1305_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_POLY1305_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_poly1305_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_POLY1305_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_poly1305_test_lib.a
@@ -7387,7 +7451,7 @@
 $(LIBBORINGSSL_REFCOUNT_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX
 $(LIBBORINGSSL_REFCOUNT_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-unknown-pragmas -Wno-implicit-function-declaration -Wno-unused-variable -Wno-sign-compare $(NO_W_EXTRA_SEMI)
 
-$(LIBDIR)/$(CONFIG)/libboringssl_refcount_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_REFCOUNT_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_refcount_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBBORINGSSL_REFCOUNT_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_refcount_test_lib.a
@@ -7423,7 +7487,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_rsa_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_RSA_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_rsa_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_RSA_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_rsa_test_lib.a
@@ -7452,7 +7516,7 @@
 $(LIBBORINGSSL_THREAD_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX
 $(LIBBORINGSSL_THREAD_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-unknown-pragmas -Wno-implicit-function-declaration -Wno-unused-variable -Wno-sign-compare $(NO_W_EXTRA_SEMI)
 
-$(LIBDIR)/$(CONFIG)/libboringssl_thread_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_THREAD_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_thread_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBBORINGSSL_THREAD_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_thread_test_lib.a
@@ -7479,7 +7543,7 @@
 $(LIBBORINGSSL_PKCS7_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX
 $(LIBBORINGSSL_PKCS7_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-unknown-pragmas -Wno-implicit-function-declaration -Wno-unused-variable -Wno-sign-compare $(NO_W_EXTRA_SEMI)
 
-$(LIBDIR)/$(CONFIG)/libboringssl_pkcs7_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_PKCS7_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_pkcs7_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBBORINGSSL_PKCS7_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_pkcs7_test_lib.a
@@ -7515,7 +7579,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_x509_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_X509_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_x509_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_X509_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_x509_test_lib.a
@@ -7544,7 +7608,7 @@
 $(LIBBORINGSSL_TAB_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX
 $(LIBBORINGSSL_TAB_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-unknown-pragmas -Wno-implicit-function-declaration -Wno-unused-variable -Wno-sign-compare $(NO_W_EXTRA_SEMI)
 
-$(LIBDIR)/$(CONFIG)/libboringssl_tab_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_TAB_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_tab_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBBORINGSSL_TAB_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_tab_test_lib.a
@@ -7571,7 +7635,7 @@
 $(LIBBORINGSSL_V3NAME_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX
 $(LIBBORINGSSL_V3NAME_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-unknown-pragmas -Wno-implicit-function-declaration -Wno-unused-variable -Wno-sign-compare $(NO_W_EXTRA_SEMI)
 
-$(LIBDIR)/$(CONFIG)/libboringssl_v3name_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_V3NAME_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_v3name_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBBORINGSSL_V3NAME_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_v3name_test_lib.a
@@ -7607,7 +7671,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libboringssl_ssl_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_SSL_TEST_LIB_OBJS) 
+$(LIBDIR)/$(CONFIG)/libboringssl_ssl_test_lib.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_SSL_TEST_LIB_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ssl_test_lib.a
@@ -7656,7 +7720,7 @@
 
 else
 
-$(LIBDIR)/$(CONFIG)/libbenchmark.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBENCHMARK_OBJS) 
+$(LIBDIR)/$(CONFIG)/libbenchmark.a: $(ZLIB_DEP) $(CARES_DEP)  $(PROTOBUF_DEP) $(LIBBENCHMARK_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libbenchmark.a
@@ -7698,7 +7762,7 @@
 
 $(LIBZ_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-implicit-function-declaration $(W_NO_SHIFT_NEGATIVE_VALUE) -fvisibility=hidden
 
-$(LIBDIR)/$(CONFIG)/libz.a:  $(LIBZ_OBJS) 
+$(LIBDIR)/$(CONFIG)/libz.a: $(CARES_DEP)  $(LIBZ_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libz.a
@@ -7715,6 +7779,81 @@
 endif
 
 
+LIBARES_SRC = \
+    third_party/cares/cares/ares__close_sockets.c \
+    third_party/cares/cares/ares__get_hostent.c \
+    third_party/cares/cares/ares__read_line.c \
+    third_party/cares/cares/ares__timeval.c \
+    third_party/cares/cares/ares_cancel.c \
+    third_party/cares/cares/ares_create_query.c \
+    third_party/cares/cares/ares_data.c \
+    third_party/cares/cares/ares_destroy.c \
+    third_party/cares/cares/ares_expand_name.c \
+    third_party/cares/cares/ares_expand_string.c \
+    third_party/cares/cares/ares_fds.c \
+    third_party/cares/cares/ares_free_hostent.c \
+    third_party/cares/cares/ares_free_string.c \
+    third_party/cares/cares/ares_getenv.c \
+    third_party/cares/cares/ares_gethostbyaddr.c \
+    third_party/cares/cares/ares_gethostbyname.c \
+    third_party/cares/cares/ares_getnameinfo.c \
+    third_party/cares/cares/ares_getopt.c \
+    third_party/cares/cares/ares_getsock.c \
+    third_party/cares/cares/ares_init.c \
+    third_party/cares/cares/ares_library_init.c \
+    third_party/cares/cares/ares_llist.c \
+    third_party/cares/cares/ares_mkquery.c \
+    third_party/cares/cares/ares_nowarn.c \
+    third_party/cares/cares/ares_options.c \
+    third_party/cares/cares/ares_parse_a_reply.c \
+    third_party/cares/cares/ares_parse_aaaa_reply.c \
+    third_party/cares/cares/ares_parse_mx_reply.c \
+    third_party/cares/cares/ares_parse_naptr_reply.c \
+    third_party/cares/cares/ares_parse_ns_reply.c \
+    third_party/cares/cares/ares_parse_ptr_reply.c \
+    third_party/cares/cares/ares_parse_soa_reply.c \
+    third_party/cares/cares/ares_parse_srv_reply.c \
+    third_party/cares/cares/ares_parse_txt_reply.c \
+    third_party/cares/cares/ares_platform.c \
+    third_party/cares/cares/ares_process.c \
+    third_party/cares/cares/ares_query.c \
+    third_party/cares/cares/ares_search.c \
+    third_party/cares/cares/ares_send.c \
+    third_party/cares/cares/ares_strcasecmp.c \
+    third_party/cares/cares/ares_strdup.c \
+    third_party/cares/cares/ares_strerror.c \
+    third_party/cares/cares/ares_timeout.c \
+    third_party/cares/cares/ares_version.c \
+    third_party/cares/cares/ares_writev.c \
+    third_party/cares/cares/bitncmp.c \
+    third_party/cares/cares/inet_net_pton.c \
+    third_party/cares/cares/inet_ntop.c \
+    third_party/cares/cares/windows_port.c \
+
+PUBLIC_HEADERS_C += \
+
+LIBARES_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBARES_SRC))))
+
+$(LIBARES_OBJS): CPPFLAGS += -Ithird_party/cares -Ithird_party/cares/cares $(if $(subst Linux,,$(SYSTEM)),,-Ithird_party/cares/config_linux) $(if $(subst Darwin,,$(SYSTEM)),,-Ithird_party/cares/config_darwin) -fvisibility=hidden -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX -DHAVE_CONFIG_H
+$(LIBARES_OBJS): CFLAGS += -Wno-sign-conversion -Wno-invalid-source-encoding
+
+$(LIBDIR)/$(CONFIG)/libares.a: $(ZLIB_DEP)  $(LIBARES_OBJS) 
+	$(E) "[AR]      Creating $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libares.a
+	$(Q) $(AR) $(AROPTS) $(LIBDIR)/$(CONFIG)/libares.a $(LIBARES_OBJS) 
+ifeq ($(SYSTEM),Darwin)
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libares.a
+endif
+
+
+
+
+ifneq ($(NO_DEPS),true)
+-include $(LIBARES_OBJS:.o=.dep)
+endif
+
+
 LIBBAD_CLIENT_TEST_SRC = \
     test/core/bad_client/bad_client.c \
 
@@ -7941,7 +8080,7 @@
 LIBEND2END_NOSEC_TESTS_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBEND2END_NOSEC_TESTS_SRC))))
 
 
-$(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a: $(ZLIB_DEP)  $(LIBEND2END_NOSEC_TESTS_OBJS) 
+$(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a: $(ZLIB_DEP) $(CARES_DEP)  $(LIBEND2END_NOSEC_TESTS_OBJS) 
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a
@@ -18666,7 +18805,6 @@
 src/core/lib/security/transport/security_handshaker.c: $(OPENSSL_DEP)
 src/core/lib/security/transport/server_auth_filter.c: $(OPENSSL_DEP)
 src/core/lib/security/transport/tsi_error.c: $(OPENSSL_DEP)
-src/core/lib/security/util/b64.c: $(OPENSSL_DEP)
 src/core/lib/security/util/json_util.c: $(OPENSSL_DEP)
 src/core/lib/surface/init_secure.c: $(OPENSSL_DEP)
 src/core/lib/tsi/fake_transport_security.c: $(OPENSSL_DEP)
diff --git a/PYTHON-MANIFEST.in b/PYTHON-MANIFEST.in
index adeb390..8465305 100644
--- a/PYTHON-MANIFEST.in
+++ b/PYTHON-MANIFEST.in
@@ -7,6 +7,7 @@
 graft third_party/boringssl
 graft third_party/nanopb
 graft third_party/zlib
+graft third_party/c-ares
 include src/python/grpcio/_spawn_patch.py
 include src/python/grpcio/commands.py
 include src/python/grpcio/grpc_version.py
diff --git a/README.md b/README.md
index 174e861..adcfdf1 100644
--- a/README.md
+++ b/README.md
@@ -7,11 +7,11 @@
 
 Copyright 2015 Google Inc.
 
-#Documentation
+# Documentation
 
 You can find more detailed documentation and examples in the [doc](doc) and [examples](examples) directories respectively.
 
-#Installation & Testing
+# Installation & Testing
 
 See [INSTALL](INSTALL.md) for installation instructions for various platforms.
 
@@ -19,7 +19,7 @@
 
 See [Performance dashboard](http://performance-dot-grpc-testing.appspot.com/explore?dashboard=5712453606309888) for the performance numbers for v1.0.x.
 
-#Repository Structure & Status
+# Repository Structure & Status
 
 This repository contains source code for gRPC libraries for multiple languages written on top of shared C core library [src/core] (src/core).
 
@@ -37,14 +37,14 @@
 | Objective-C             | [src/objective-c] (src/objective-c) | 1.0     |
 
 <small>
-Java source code is in the [grpc-java] (http://github.com/grpc/grpc-java) repository.
-Go source code is in the [grpc-go] (http://github.com/grpc/grpc-go) repository.
+Java source code is in the [grpc-java](http://github.com/grpc/grpc-java) repository.
+Go source code is in the [grpc-go](http://github.com/grpc/grpc-go) repository.
 </small>
 
 See [MANIFEST.md](MANIFEST.md) for a listing of top-level items in the
 repository.
 
-#Overview
+# Overview
 
 
 Remote Procedure Calls (RPCs) provide a useful abstraction for building
@@ -54,7 +54,7 @@
 combination of the supported languages.
 
 
-##Interface
+## Interface
 
 
 Developers using gRPC typically start with the description of an RPC service
@@ -66,7 +66,7 @@
 and the structure of the payload messages. It is possible to use other
 alternatives if desired.
 
-###Surface API
+### Surface API
 Starting from an interface definition in a .proto file, gRPC provides
 Protocol Compiler plugins that generate Client- and Server-side APIs.
 gRPC users typically call into these APIs on the Client side and implement
@@ -94,7 +94,7 @@
 messages are delivered in the order they were sent.
 
 
-#Protocol
+# Protocol
 
 The [gRPC protocol](doc/PROTOCOL-HTTP2.md) specifies the abstract requirements for communication between
 clients and servers. A concrete embedding over HTTP/2 completes the picture by
diff --git a/Rakefile b/Rakefile
index 12ac127..cc02aa1 100755
--- a/Rakefile
+++ b/Rakefile
@@ -12,7 +12,8 @@
 # Add rubocop style checking tasks
 RuboCop::RakeTask.new(:rubocop) do |task|
   task.options = ['-c', 'src/ruby/.rubocop.yml']
-  task.patterns = ['src/ruby/{lib,spec}/**/*.rb']
+  # add end2end tests to formatter but don't add generated proto _pb.rb's
+  task.patterns = ['src/ruby/{lib,spec}/**/*.rb', 'src/ruby/end2end/*.rb']
 end
 
 spec = Gem::Specification.load('grpc.gemspec')
diff --git a/WORKSPACE b/WORKSPACE
index 9b79d04..da63c5f 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -29,6 +29,11 @@
 )
 
 bind(
+    name = "cares",
+    actual = "@submodule_cares//:ares",
+)
+
+bind(
     name = "gtest",
     actual = "@submodule_gtest//:gtest",
 )
@@ -66,3 +71,15 @@
     name = "com_github_gflags_gflags",
     path = "third_party/gflags",
 )
+
+git_repository(
+    name   = "mongoose_repo",
+    commit = "4120a97945b41195a6223a600dae8e3b19bed19e",
+    remote = "https://github.com/makdharma/mongoose.git"
+)
+
+new_local_repository(
+    name = "submodule_cares",
+    path = "third_party/cares",
+    build_file = "third_party/cares/cares.BUILD",
+)
diff --git a/binding.gyp b/binding.gyp
index 2ec5776..b91f5f6 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -39,11 +39,9 @@
 {
   'variables': {
     'runtime%': 'node',
-    # UV integration in C core is disabled by default while bugs are ironed
-    # out. It can be re-enabled for one build by setting the npm config
-    # variable grpc_uv to true, and it can be re-enabled permanently by
-    # setting it to true here.
-    'grpc_uv%': 'false',
+    # UV integration in C core is enabled by default. It can be disabled
+    # by setting this argument to anything else.
+    'grpc_uv%': 'true',
     # Some Node installations use the system installation of OpenSSL, and on
     # some systems, the system OpenSSL still does not have ALPN support. This
     # will let users recompile gRPC to work without ALPN.
@@ -60,6 +58,9 @@
     'conditions': [
       ['grpc_uv=="true"', {
         'defines': [
+          'GRPC_ARES=0',
+          # Disabling this while bugs are ironed out. Uncomment this to
+          # re-enable libuv integration in C core.
           'GRPC_UV'
         ]
       }],
@@ -105,7 +106,8 @@
       }],
       ['OS == "win"', {
         "include_dirs": [
-          "third_party/zlib"
+          "third_party/zlib",
+          "third_party/cares/cares"
         ],
         "defines": [
           '_WIN32_WINNT=0x0600',
@@ -128,7 +130,8 @@
           'config': '<!(echo $CONFIG)',
         },
         'include_dirs': [
-          '<(node_root_dir)/deps/zlib'
+          '<(node_root_dir)/deps/zlib',
+          '<(node_root_dir)/deps/cares/include',
         ],
         'conditions': [
           ['config=="gcov"', {
@@ -529,6 +532,7 @@
     }]
   ],
   'targets': [
+
     {
       'cflags': [
         '-std=c99',
@@ -607,6 +611,7 @@
       'type': 'static_library',
       'dependencies': [
         'gpr',
+        'node_modules/cares/deps/cares/cares.gyp:cares',
       ],
       'sources': [
         'src/core/lib/surface/init.c',
@@ -657,6 +662,7 @@
         'src/core/lib/iomgr/resolve_address_windows.c',
         'src/core/lib/iomgr/resource_quota.c',
         'src/core/lib/iomgr/sockaddr_utils.c',
+        'src/core/lib/iomgr/socket_factory_posix.c',
         'src/core/lib/iomgr/socket_mutator.c',
         'src/core/lib/iomgr/socket_utils_common_posix.c',
         'src/core/lib/iomgr/socket_utils_linux.c',
@@ -694,6 +700,7 @@
         'src/core/lib/json/json_reader.c',
         'src/core/lib/json/json_string.c',
         'src/core/lib/json/json_writer.c',
+        'src/core/lib/security/util/b64.c',
         'src/core/lib/slice/percent_encoding.c',
         'src/core/lib/slice/slice.c',
         'src/core/lib/slice/slice_buffer.c',
@@ -712,6 +719,7 @@
         'src/core/lib/surface/channel_ping.c',
         'src/core/lib/surface/channel_stack_type.c',
         'src/core/lib/surface/completion_queue.c',
+        'src/core/lib/surface/completion_queue_factory.c',
         'src/core/lib/surface/event_string.c',
         'src/core/lib/surface/lame_client.c',
         'src/core/lib/surface/metadata_array.c',
@@ -775,7 +783,6 @@
         'src/core/lib/security/transport/security_handshaker.c',
         'src/core/lib/security/transport/server_auth_filter.c',
         'src/core/lib/security/transport/tsi_error.c',
-        'src/core/lib/security/util/b64.c',
         'src/core/lib/security/util/json_util.c',
         'src/core/lib/surface/init_secure.c',
         'src/core/lib/tsi/fake_transport_security.c',
@@ -817,6 +824,9 @@
         'third_party/nanopb/pb_encode.c',
         'src/core/ext/lb_policy/pick_first/pick_first.c',
         'src/core/ext/lb_policy/round_robin/round_robin.c',
+        'src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c',
+        'src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c',
+        'src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c',
         'src/core/ext/resolver/dns/native/dns_resolver.c',
         'src/core/ext/resolver/sockaddr/sockaddr_resolver.c',
         'src/core/ext/load_reporting/load_reporting.c',
@@ -907,6 +917,7 @@
       "dependencies": [
         "grpc",
         "gpr",
+        "node_modules/cares/deps/cares/cares.gyp:cares",
       ]
     },
     {
diff --git a/build.yaml b/build.yaml
index 0a7f188..6e590f4 100644
--- a/build.yaml
+++ b/build.yaml
@@ -223,6 +223,7 @@
   - src/core/lib/iomgr/sockaddr_posix.h
   - src/core/lib/iomgr/sockaddr_utils.h
   - src/core/lib/iomgr/sockaddr_windows.h
+  - src/core/lib/iomgr/socket_factory_posix.h
   - src/core/lib/iomgr/socket_mutator.h
   - src/core/lib/iomgr/socket_utils.h
   - src/core/lib/iomgr/socket_utils_posix.h
@@ -262,6 +263,7 @@
   - src/core/lib/surface/channel_init.h
   - src/core/lib/surface/channel_stack_type.h
   - src/core/lib/surface/completion_queue.h
+  - src/core/lib/surface/completion_queue_factory.h
   - src/core/lib/surface/event_string.h
   - src/core/lib/surface/init.h
   - src/core/lib/surface/lame_client.h
@@ -329,6 +331,7 @@
   - src/core/lib/iomgr/resolve_address_windows.c
   - src/core/lib/iomgr/resource_quota.c
   - src/core/lib/iomgr/sockaddr_utils.c
+  - src/core/lib/iomgr/socket_factory_posix.c
   - src/core/lib/iomgr/socket_mutator.c
   - src/core/lib/iomgr/socket_utils_common_posix.c
   - src/core/lib/iomgr/socket_utils_linux.c
@@ -366,6 +369,7 @@
   - src/core/lib/json/json_reader.c
   - src/core/lib/json/json_string.c
   - src/core/lib/json/json_writer.c
+  - src/core/lib/security/util/b64.c
   - src/core/lib/slice/percent_encoding.c
   - src/core/lib/slice/slice.c
   - src/core/lib/slice/slice_buffer.c
@@ -384,6 +388,7 @@
   - src/core/lib/surface/channel_ping.c
   - src/core/lib/surface/channel_stack_type.c
   - src/core/lib/surface/completion_queue.c
+  - src/core/lib/surface/completion_queue_factory.c
   - src/core/lib/surface/event_string.c
   - src/core/lib/surface/lame_client.c
   - src/core/lib/surface/metadata_array.c
@@ -518,6 +523,18 @@
   plugin: grpc_load_reporting_plugin
   uses:
   - grpc_base
+- name: grpc_resolver_dns_ares
+  headers:
+  - src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h
+  - src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h
+  src:
+  - src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c
+  - src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c
+  - src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c
+  plugin: grpc_resolver_dns_ares
+  uses:
+  - grpc_base
+  - grpc_client_channel
 - name: grpc_resolver_dns_native
   src:
   - src/core/ext/resolver/dns/native/dns_resolver.c
@@ -962,6 +979,7 @@
   - grpc_lb_policy_grpclb_secure
   - grpc_lb_policy_pick_first
   - grpc_lb_policy_round_robin
+  - grpc_resolver_dns_ares
   - grpc_resolver_dns_native
   - grpc_resolver_sockaddr
   - grpc_load_reporting
@@ -1055,6 +1073,7 @@
   - grpc_base
   - grpc_transport_chttp2_server_insecure
   - grpc_transport_chttp2_client_insecure
+  - grpc_resolver_dns_ares
   - grpc_resolver_dns_native
   - grpc_resolver_sockaddr
   - grpc_load_reporting
@@ -4305,6 +4324,11 @@
     test_environ:
       UBSAN_OPTIONS: halt_on_error=1:print_stacktrace=1:suppressions=tools/ubsan_suppressions.txt
 defaults:
+  ares:
+    CFLAGS: -Wno-sign-conversion -Wno-invalid-source-encoding
+    CPPFLAGS: -Ithird_party/cares -Ithird_party/cares/cares $(if $(subst Linux,,$(SYSTEM)),,-Ithird_party/cares/config_linux)
+      $(if $(subst Darwin,,$(SYSTEM)),,-Ithird_party/cares/config_darwin) -fvisibility=hidden
+      -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX -DHAVE_CONFIG_H
   benchmark:
     CPPFLAGS: -Ithird_party/benchmark/include -DHAVE_POSIX_REGEX
   boringssl:
@@ -4395,11 +4419,13 @@
   deps:
   - grpc
   - gpr
+  - ares
   - boringssl
   - z
 ruby_gem:
   deps:
   - grpc
   - gpr
+  - ares
   - boringssl
   - z
diff --git a/config.m4 b/config.m4
index 2bf302b..b6f0bff 100644
--- a/config.m4
+++ b/config.m4
@@ -130,6 +130,7 @@
     src/core/lib/iomgr/resolve_address_windows.c \
     src/core/lib/iomgr/resource_quota.c \
     src/core/lib/iomgr/sockaddr_utils.c \
+    src/core/lib/iomgr/socket_factory_posix.c \
     src/core/lib/iomgr/socket_mutator.c \
     src/core/lib/iomgr/socket_utils_common_posix.c \
     src/core/lib/iomgr/socket_utils_linux.c \
@@ -167,6 +168,7 @@
     src/core/lib/json/json_reader.c \
     src/core/lib/json/json_string.c \
     src/core/lib/json/json_writer.c \
+    src/core/lib/security/util/b64.c \
     src/core/lib/slice/percent_encoding.c \
     src/core/lib/slice/slice.c \
     src/core/lib/slice/slice_buffer.c \
@@ -185,6 +187,7 @@
     src/core/lib/surface/channel_ping.c \
     src/core/lib/surface/channel_stack_type.c \
     src/core/lib/surface/completion_queue.c \
+    src/core/lib/surface/completion_queue_factory.c \
     src/core/lib/surface/event_string.c \
     src/core/lib/surface/lame_client.c \
     src/core/lib/surface/metadata_array.c \
@@ -248,7 +251,6 @@
     src/core/lib/security/transport/security_handshaker.c \
     src/core/lib/security/transport/server_auth_filter.c \
     src/core/lib/security/transport/tsi_error.c \
-    src/core/lib/security/util/b64.c \
     src/core/lib/security/util/json_util.c \
     src/core/lib/surface/init_secure.c \
     src/core/lib/tsi/fake_transport_security.c \
@@ -290,6 +292,9 @@
     third_party/nanopb/pb_encode.c \
     src/core/ext/lb_policy/pick_first/pick_first.c \
     src/core/ext/lb_policy/round_robin/round_robin.c \
+    src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c \
+    src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c \
+    src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c \
     src/core/ext/resolver/dns/native/dns_resolver.c \
     src/core/ext/resolver/sockaddr/sockaddr_resolver.c \
     src/core/ext/load_reporting/load_reporting.c \
@@ -629,6 +634,7 @@
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/lb_policy/pick_first)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/lb_policy/round_robin)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/load_reporting)
+  PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/resolver/dns/c_ares)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/resolver/dns/native)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/resolver/sockaddr)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/transport/chttp2/alpn)
diff --git a/doc/environment_variables.md b/doc/environment_variables.md
index a380673..513936d 100644
--- a/doc/environment_variables.md
+++ b/doc/environment_variables.md
@@ -69,3 +69,11 @@
   - DEBUG - log all gRPC messages
   - INFO - log INFO and ERROR message
   - ERROR - log only errors
+
+* GRPC_DNS_RESOLVER
+  Declares which DNS resolver to use. The default is ares if gRPC is built with
+  c-ares support. Otherwise, the value of this environment variable is ignored.
+  Available DNS resolver include:
+  - native (default)- a DNS resolver based around getaddrinfo(), creates a new thread to
+    perform name resolution
+  - ares - a DNS resolver based around the c-ares library
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index 6d1a597..8ea9e5f 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -51,7 +51,7 @@
     :submodules => true,
   }
 
-  s.ios.deployment_target = '7.1'
+  s.ios.deployment_target = '7.0'
   s.osx.deployment_target = '10.9'
   s.requires_arc = false
 
@@ -104,6 +104,7 @@
   }
 
   s.default_subspecs = 'Interface', 'Implementation'
+  s.compiler_flags = '-DGRPC_ARES=0'
 
   # Like many other C libraries, gRPC-Core has its public headers under `include/<libname>/` and its
   # sources and private headers in other directories outside `include/`. Cocoapods' linter doesn't
@@ -304,6 +305,7 @@
                       'src/core/lib/iomgr/sockaddr_posix.h',
                       'src/core/lib/iomgr/sockaddr_utils.h',
                       'src/core/lib/iomgr/sockaddr_windows.h',
+                      'src/core/lib/iomgr/socket_factory_posix.h',
                       'src/core/lib/iomgr/socket_mutator.h',
                       'src/core/lib/iomgr/socket_utils.h',
                       'src/core/lib/iomgr/socket_utils_posix.h',
@@ -343,6 +345,7 @@
                       'src/core/lib/surface/channel_init.h',
                       'src/core/lib/surface/channel_stack_type.h',
                       'src/core/lib/surface/completion_queue.h',
+                      'src/core/lib/surface/completion_queue_factory.h',
                       'src/core/lib/surface/event_string.h',
                       'src/core/lib/surface/init.h',
                       'src/core/lib/surface/lame_client.h',
@@ -434,6 +437,8 @@
                       'third_party/nanopb/pb_common.h',
                       'third_party/nanopb/pb_decode.h',
                       'third_party/nanopb/pb_encode.h',
+                      'src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h',
+                      'src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h',
                       'src/core/ext/load_reporting/load_reporting.h',
                       'src/core/ext/load_reporting/load_reporting_filter.h',
                       'src/core/ext/census/aggregation.h',
@@ -500,6 +505,7 @@
                       'src/core/lib/iomgr/resolve_address_windows.c',
                       'src/core/lib/iomgr/resource_quota.c',
                       'src/core/lib/iomgr/sockaddr_utils.c',
+                      'src/core/lib/iomgr/socket_factory_posix.c',
                       'src/core/lib/iomgr/socket_mutator.c',
                       'src/core/lib/iomgr/socket_utils_common_posix.c',
                       'src/core/lib/iomgr/socket_utils_linux.c',
@@ -537,6 +543,7 @@
                       'src/core/lib/json/json_reader.c',
                       'src/core/lib/json/json_string.c',
                       'src/core/lib/json/json_writer.c',
+                      'src/core/lib/security/util/b64.c',
                       'src/core/lib/slice/percent_encoding.c',
                       'src/core/lib/slice/slice.c',
                       'src/core/lib/slice/slice_buffer.c',
@@ -555,6 +562,7 @@
                       'src/core/lib/surface/channel_ping.c',
                       'src/core/lib/surface/channel_stack_type.c',
                       'src/core/lib/surface/completion_queue.c',
+                      'src/core/lib/surface/completion_queue_factory.c',
                       'src/core/lib/surface/event_string.c',
                       'src/core/lib/surface/lame_client.c',
                       'src/core/lib/surface/metadata_array.c',
@@ -618,7 +626,6 @@
                       'src/core/lib/security/transport/security_handshaker.c',
                       'src/core/lib/security/transport/server_auth_filter.c',
                       'src/core/lib/security/transport/tsi_error.c',
-                      'src/core/lib/security/util/b64.c',
                       'src/core/lib/security/util/json_util.c',
                       'src/core/lib/surface/init_secure.c',
                       'src/core/lib/tsi/fake_transport_security.c',
@@ -660,6 +667,9 @@
                       'third_party/nanopb/pb_encode.c',
                       'src/core/ext/lb_policy/pick_first/pick_first.c',
                       'src/core/ext/lb_policy/round_robin/round_robin.c',
+                      'src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c',
+                      'src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c',
+                      'src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c',
                       'src/core/ext/resolver/dns/native/dns_resolver.c',
                       'src/core/ext/resolver/sockaddr/sockaddr_resolver.c',
                       'src/core/ext/load_reporting/load_reporting.c',
@@ -743,6 +753,7 @@
                               'src/core/lib/iomgr/sockaddr_posix.h',
                               'src/core/lib/iomgr/sockaddr_utils.h',
                               'src/core/lib/iomgr/sockaddr_windows.h',
+                              'src/core/lib/iomgr/socket_factory_posix.h',
                               'src/core/lib/iomgr/socket_mutator.h',
                               'src/core/lib/iomgr/socket_utils.h',
                               'src/core/lib/iomgr/socket_utils_posix.h',
@@ -782,6 +793,7 @@
                               'src/core/lib/surface/channel_init.h',
                               'src/core/lib/surface/channel_stack_type.h',
                               'src/core/lib/surface/completion_queue.h',
+                              'src/core/lib/surface/completion_queue_factory.h',
                               'src/core/lib/surface/event_string.h',
                               'src/core/lib/surface/init.h',
                               'src/core/lib/surface/lame_client.h',
@@ -873,6 +885,8 @@
                               'third_party/nanopb/pb_common.h',
                               'third_party/nanopb/pb_decode.h',
                               'third_party/nanopb/pb_encode.h',
+                              'src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h',
+                              'src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h',
                               'src/core/ext/load_reporting/load_reporting.h',
                               'src/core/ext/load_reporting/load_reporting_filter.h',
                               'src/core/ext/census/aggregation.h',
@@ -895,8 +909,7 @@
 
   s.subspec 'Cronet-Interface' do |ss|
     ss.header_mappings_dir = 'include/grpc'
-    ss.source_files = 'include/grpc/grpc_cronet.h',
-                      'src/core/ext/transport/cronet/transport/cronet_transport.h'
+    ss.source_files = 'include/grpc/grpc_cronet.h'
   end
 
   s.subspec 'Cronet-Implementation' do |ss|
@@ -907,7 +920,7 @@
     ss.dependency "#{s.name}/Cronet-Interface", version
 
     ss.source_files = 'src/core/ext/transport/cronet/client/secure/cronet_channel_create.c',
-                      'src/core/ext/transport/cronet/transport/cronet_transport.c',
+                      'src/core/ext/transport/cronet/transport/cronet_transport.{c,h}',
                       'third_party/objective_c/Cronet/bidirectional_stream_c.h'
   end
 
@@ -922,7 +935,7 @@
                       'test/core/end2end/end2end_test_utils.c',
                       'test/core/end2end/tests/*.{c,h}',
                       'test/core/end2end/data/*.{c,h}',
-                      'test/core/util/debugger_macros.c',
+                      'test/core/util/debugger_macros.{c,h}',
                       'test/core/util/test_config.{c,h}',
                       'test/core/util/port.h',
                       'test/core/util/port.c',
diff --git a/gRPC-ProtoRPC.podspec b/gRPC-ProtoRPC.podspec
index 6ca9fcd..1940015 100644
--- a/gRPC-ProtoRPC.podspec
+++ b/gRPC-ProtoRPC.podspec
@@ -48,7 +48,7 @@
     :tag => "v#{version}",
   }
 
-  s.ios.deployment_target = '7.1'
+  s.ios.deployment_target = '7.0'
   s.osx.deployment_target = '10.9'
 
   name = 'ProtoRPC'
diff --git a/gRPC-RxLibrary.podspec b/gRPC-RxLibrary.podspec
index 51b52c0..841a853 100644
--- a/gRPC-RxLibrary.podspec
+++ b/gRPC-RxLibrary.podspec
@@ -48,7 +48,7 @@
     :tag => "v#{version}",
   }
 
-  s.ios.deployment_target = '7.1'
+  s.ios.deployment_target = '7.0'
   s.osx.deployment_target = '10.9'
 
   name = 'RxLibrary'
diff --git a/gRPC.podspec b/gRPC.podspec
index 83a8680..08ea791 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -47,7 +47,7 @@
     :tag => "v#{version}",
   }
 
-  s.ios.deployment_target = '7.1'
+  s.ios.deployment_target = '7.0'
   s.osx.deployment_target = '10.9'
 
   name = 'GRPCClient'
diff --git a/grpc.def b/grpc.def
index 30d60b0..1589316 100644
--- a/grpc.def
+++ b/grpc.def
@@ -53,6 +53,9 @@
     grpc_shutdown
     grpc_version_string
     grpc_g_stands_for
+    grpc_completion_queue_factory_lookup
+    grpc_completion_queue_create_for_next
+    grpc_completion_queue_create_for_pluck
     grpc_completion_queue_create
     grpc_completion_queue_next
     grpc_completion_queue_pluck
diff --git a/grpc.gemspec b/grpc.gemspec
index 8074df2..06da332 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -221,6 +221,7 @@
   s.files += %w( src/core/lib/iomgr/sockaddr_posix.h )
   s.files += %w( src/core/lib/iomgr/sockaddr_utils.h )
   s.files += %w( src/core/lib/iomgr/sockaddr_windows.h )
+  s.files += %w( src/core/lib/iomgr/socket_factory_posix.h )
   s.files += %w( src/core/lib/iomgr/socket_mutator.h )
   s.files += %w( src/core/lib/iomgr/socket_utils.h )
   s.files += %w( src/core/lib/iomgr/socket_utils_posix.h )
@@ -260,6 +261,7 @@
   s.files += %w( src/core/lib/surface/channel_init.h )
   s.files += %w( src/core/lib/surface/channel_stack_type.h )
   s.files += %w( src/core/lib/surface/completion_queue.h )
+  s.files += %w( src/core/lib/surface/completion_queue_factory.h )
   s.files += %w( src/core/lib/surface/event_string.h )
   s.files += %w( src/core/lib/surface/init.h )
   s.files += %w( src/core/lib/surface/lame_client.h )
@@ -351,6 +353,8 @@
   s.files += %w( third_party/nanopb/pb_common.h )
   s.files += %w( third_party/nanopb/pb_decode.h )
   s.files += %w( third_party/nanopb/pb_encode.h )
+  s.files += %w( src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h )
+  s.files += %w( src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h )
   s.files += %w( src/core/ext/load_reporting/load_reporting.h )
   s.files += %w( src/core/ext/load_reporting/load_reporting_filter.h )
   s.files += %w( src/core/ext/census/aggregation.h )
@@ -417,6 +421,7 @@
   s.files += %w( src/core/lib/iomgr/resolve_address_windows.c )
   s.files += %w( src/core/lib/iomgr/resource_quota.c )
   s.files += %w( src/core/lib/iomgr/sockaddr_utils.c )
+  s.files += %w( src/core/lib/iomgr/socket_factory_posix.c )
   s.files += %w( src/core/lib/iomgr/socket_mutator.c )
   s.files += %w( src/core/lib/iomgr/socket_utils_common_posix.c )
   s.files += %w( src/core/lib/iomgr/socket_utils_linux.c )
@@ -454,6 +459,7 @@
   s.files += %w( src/core/lib/json/json_reader.c )
   s.files += %w( src/core/lib/json/json_string.c )
   s.files += %w( src/core/lib/json/json_writer.c )
+  s.files += %w( src/core/lib/security/util/b64.c )
   s.files += %w( src/core/lib/slice/percent_encoding.c )
   s.files += %w( src/core/lib/slice/slice.c )
   s.files += %w( src/core/lib/slice/slice_buffer.c )
@@ -472,6 +478,7 @@
   s.files += %w( src/core/lib/surface/channel_ping.c )
   s.files += %w( src/core/lib/surface/channel_stack_type.c )
   s.files += %w( src/core/lib/surface/completion_queue.c )
+  s.files += %w( src/core/lib/surface/completion_queue_factory.c )
   s.files += %w( src/core/lib/surface/event_string.c )
   s.files += %w( src/core/lib/surface/lame_client.c )
   s.files += %w( src/core/lib/surface/metadata_array.c )
@@ -535,7 +542,6 @@
   s.files += %w( src/core/lib/security/transport/security_handshaker.c )
   s.files += %w( src/core/lib/security/transport/server_auth_filter.c )
   s.files += %w( src/core/lib/security/transport/tsi_error.c )
-  s.files += %w( src/core/lib/security/util/b64.c )
   s.files += %w( src/core/lib/security/util/json_util.c )
   s.files += %w( src/core/lib/surface/init_secure.c )
   s.files += %w( src/core/lib/tsi/fake_transport_security.c )
@@ -577,6 +583,9 @@
   s.files += %w( third_party/nanopb/pb_encode.c )
   s.files += %w( src/core/ext/lb_policy/pick_first/pick_first.c )
   s.files += %w( src/core/ext/lb_policy/round_robin/round_robin.c )
+  s.files += %w( src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c )
+  s.files += %w( src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c )
+  s.files += %w( src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c )
   s.files += %w( src/core/ext/resolver/dns/native/dns_resolver.c )
   s.files += %w( src/core/ext/resolver/sockaddr/sockaddr_resolver.c )
   s.files += %w( src/core/ext/load_reporting/load_reporting.c )
@@ -1030,4 +1039,77 @@
   s.files += %w( third_party/zlib/trees.c )
   s.files += %w( third_party/zlib/uncompr.c )
   s.files += %w( third_party/zlib/zutil.c )
+  s.files += %w( third_party/cares/cares/ares.h )
+  s.files += %w( third_party/cares/cares/ares_data.h )
+  s.files += %w( third_party/cares/cares/ares_dns.h )
+  s.files += %w( third_party/cares/cares/ares_getenv.h )
+  s.files += %w( third_party/cares/cares/ares_getopt.h )
+  s.files += %w( third_party/cares/cares/ares_inet_net_pton.h )
+  s.files += %w( third_party/cares/cares/ares_iphlpapi.h )
+  s.files += %w( third_party/cares/cares/ares_ipv6.h )
+  s.files += %w( third_party/cares/cares/ares_library_init.h )
+  s.files += %w( third_party/cares/cares/ares_llist.h )
+  s.files += %w( third_party/cares/cares/ares_nowarn.h )
+  s.files += %w( third_party/cares/cares/ares_platform.h )
+  s.files += %w( third_party/cares/cares/ares_private.h )
+  s.files += %w( third_party/cares/cares/ares_rules.h )
+  s.files += %w( third_party/cares/cares/ares_setup.h )
+  s.files += %w( third_party/cares/cares/ares_strcasecmp.h )
+  s.files += %w( third_party/cares/cares/ares_strdup.h )
+  s.files += %w( third_party/cares/cares/ares_version.h )
+  s.files += %w( third_party/cares/cares/bitncmp.h )
+  s.files += %w( third_party/cares/cares/config-win32.h )
+  s.files += %w( third_party/cares/cares/setup_once.h )
+  s.files += %w( third_party/cares/ares_build.h )
+  s.files += %w( third_party/cares/config_linux/ares_config.h )
+  s.files += %w( third_party/cares/config_darwin/ares_config.h )
+  s.files += %w( third_party/cares/cares/ares__close_sockets.c )
+  s.files += %w( third_party/cares/cares/ares__get_hostent.c )
+  s.files += %w( third_party/cares/cares/ares__read_line.c )
+  s.files += %w( third_party/cares/cares/ares__timeval.c )
+  s.files += %w( third_party/cares/cares/ares_cancel.c )
+  s.files += %w( third_party/cares/cares/ares_create_query.c )
+  s.files += %w( third_party/cares/cares/ares_data.c )
+  s.files += %w( third_party/cares/cares/ares_destroy.c )
+  s.files += %w( third_party/cares/cares/ares_expand_name.c )
+  s.files += %w( third_party/cares/cares/ares_expand_string.c )
+  s.files += %w( third_party/cares/cares/ares_fds.c )
+  s.files += %w( third_party/cares/cares/ares_free_hostent.c )
+  s.files += %w( third_party/cares/cares/ares_free_string.c )
+  s.files += %w( third_party/cares/cares/ares_getenv.c )
+  s.files += %w( third_party/cares/cares/ares_gethostbyaddr.c )
+  s.files += %w( third_party/cares/cares/ares_gethostbyname.c )
+  s.files += %w( third_party/cares/cares/ares_getnameinfo.c )
+  s.files += %w( third_party/cares/cares/ares_getopt.c )
+  s.files += %w( third_party/cares/cares/ares_getsock.c )
+  s.files += %w( third_party/cares/cares/ares_init.c )
+  s.files += %w( third_party/cares/cares/ares_library_init.c )
+  s.files += %w( third_party/cares/cares/ares_llist.c )
+  s.files += %w( third_party/cares/cares/ares_mkquery.c )
+  s.files += %w( third_party/cares/cares/ares_nowarn.c )
+  s.files += %w( third_party/cares/cares/ares_options.c )
+  s.files += %w( third_party/cares/cares/ares_parse_a_reply.c )
+  s.files += %w( third_party/cares/cares/ares_parse_aaaa_reply.c )
+  s.files += %w( third_party/cares/cares/ares_parse_mx_reply.c )
+  s.files += %w( third_party/cares/cares/ares_parse_naptr_reply.c )
+  s.files += %w( third_party/cares/cares/ares_parse_ns_reply.c )
+  s.files += %w( third_party/cares/cares/ares_parse_ptr_reply.c )
+  s.files += %w( third_party/cares/cares/ares_parse_soa_reply.c )
+  s.files += %w( third_party/cares/cares/ares_parse_srv_reply.c )
+  s.files += %w( third_party/cares/cares/ares_parse_txt_reply.c )
+  s.files += %w( third_party/cares/cares/ares_platform.c )
+  s.files += %w( third_party/cares/cares/ares_process.c )
+  s.files += %w( third_party/cares/cares/ares_query.c )
+  s.files += %w( third_party/cares/cares/ares_search.c )
+  s.files += %w( third_party/cares/cares/ares_send.c )
+  s.files += %w( third_party/cares/cares/ares_strcasecmp.c )
+  s.files += %w( third_party/cares/cares/ares_strdup.c )
+  s.files += %w( third_party/cares/cares/ares_strerror.c )
+  s.files += %w( third_party/cares/cares/ares_timeout.c )
+  s.files += %w( third_party/cares/cares/ares_version.c )
+  s.files += %w( third_party/cares/cares/ares_writev.c )
+  s.files += %w( third_party/cares/cares/bitncmp.c )
+  s.files += %w( third_party/cares/cares/inet_net_pton.c )
+  s.files += %w( third_party/cares/cares/inet_ntop.c )
+  s.files += %w( third_party/cares/cares/windows_port.c )
 end
diff --git a/include/grpc/grpc.h b/include/grpc/grpc.h
index 1b33d48..e088435 100644
--- a/include/grpc/grpc.h
+++ b/include/grpc/grpc.h
@@ -93,6 +93,71 @@
 /** Return a string specifying what the 'g' in gRPC stands for */
 GRPCAPI const char *grpc_g_stands_for(void);
 
+/** Specifies the type of APIs to use to pop events from the completion queue */
+typedef enum {
+  /* Events are popped out by calling grpc_completion_queue_next() API ONLY */
+  GRPC_CQ_NEXT = 1,
+
+  /* Events are popped out by calling grpc_completion_queue_pluck() API ONLY */
+  GRPC_CQ_PLUCK
+} grpc_cq_completion_type;
+
+/** Completion queues internally MAY maintain a set of file descriptors in a
+    structure called 'pollset'. This enum specifies if a completion queue has an
+    associated pollset and any restrictions on the type of file descriptors that
+    can be present in the pollset.
+
+    I/O progress can only be made when grpc_completion_queue_next() or
+    grpc_completion_queue_pluck() are called on the completion queue (unless the
+    grpc_cq_polling_type is GRPC_CQ_NON_POLLING) and hence it is very important
+    to actively call these APIs */
+typedef enum {
+  /** The completion queue will have an associated pollset and there is no
+      restriction on the type of file descriptors the pollset may contain */
+  GRPC_CQ_DEFAULT_POLLING,
+
+  /* Similar to GRPC_CQ_DEFAULT_POLLING except that the completion queues will
+     not contain any 'listening file descriptors' (i.e file descriptors used to
+     listen to incoming channels) */
+  GRPC_CQ_NON_LISTENING,
+
+  /* The completion queue will not have an associated pollset. Note that
+     grpc_completion_queue_next() or grpc_completion_queue_pluck() MUST still be
+     called to pop events from the completion queue; it is not required to call
+     them actively to make I/O progress */
+  GRPC_CQ_NON_POLLING
+} grpc_cq_polling_type;
+
+#define GRPC_CQ_CURRENT_VERSION 1
+typedef struct grpc_completion_queue_attributes {
+  /* The version number of this structure. More fields might be added to this
+     structure in future. */
+  int version; /* Set to GRPC_CQ_CURRENT_VERSION */
+
+  grpc_cq_completion_type cq_completion_type;
+
+  grpc_cq_polling_type cq_polling_type;
+} grpc_completion_queue_attributes;
+
+/** The completion queue factory structure is opaque to the callers of grpc */
+typedef struct grpc_completion_queue_factory grpc_completion_queue_factory;
+
+/** Returns the completion queue factory based on the attributes. MAY return a
+    NULL if no factory can be found */
+GRPCAPI const grpc_completion_queue_factory *
+grpc_completion_queue_factory_lookup(
+    const grpc_completion_queue_attributes *attributes);
+
+/** Helper function to create a completion queue with grpc_cq_completion_type
+    of GRPC_CQ_NEXT and grpc_cq_polling_type of GRPC_CQ_DEFAULT_POLLING */
+GRPCAPI grpc_completion_queue *grpc_completion_queue_create_for_next(
+    void *reserved);
+
+/** Helper function to create a completion queue with grpc_cq_completion_type
+    of GRPC_CQ_PLUCK and grpc_cq_polling_type of GRPC_CQ_DEFAULT_POLLING */
+GRPCAPI grpc_completion_queue *grpc_completion_queue_create_for_pluck(
+    void *reserved);
+
 /** Create a completion queue */
 GRPCAPI grpc_completion_queue *grpc_completion_queue_create(void *reserved);
 
diff --git a/include/grpc/impl/codegen/grpc_types.h b/include/grpc/impl/codegen/grpc_types.h
index e5c7313..887c176 100644
--- a/include/grpc/impl/codegen/grpc_types.h
+++ b/include/grpc/impl/codegen/grpc_types.h
@@ -87,6 +87,9 @@
 /** The Socket Mutator interface allows changes on socket options */
 typedef struct grpc_socket_mutator grpc_socket_mutator;
 
+/** The Socket Factory interface creates and binds sockets */
+typedef struct grpc_socket_factory grpc_socket_factory;
+
 /** Type specifier for grpc_arg */
 typedef enum {
   GRPC_ARG_STRING,
@@ -240,6 +243,8 @@
 #define GRPC_ARG_LB_POLICY_NAME "grpc.lb_policy_name"
 /** The grpc_socket_mutator instance that set the socket options. A pointer. */
 #define GRPC_ARG_SOCKET_MUTATOR "grpc.socket_mutator"
+/** The grpc_socket_factory instance to create and bind sockets. A pointer. */
+#define GRPC_ARG_SOCKET_FACTORY "grpc.socket_factory"
 /** If non-zero, Cronet transport will coalesce packets to fewer frames when
  * possible. */
 #define GRPC_ARG_USE_CRONET_PACKET_COALESCING \
diff --git a/include/grpc/impl/codegen/port_platform.h b/include/grpc/impl/codegen/port_platform.h
index e565cd3..0863946 100644
--- a/include/grpc/impl/codegen/port_platform.h
+++ b/include/grpc/impl/codegen/port_platform.h
@@ -364,6 +364,14 @@
    power of two */
 #define GPR_MAX_ALIGNMENT 16
 
+#ifndef GRPC_ARES
+#ifdef GPR_WINDOWS
+#define GRPC_ARES 0
+#else
+#define GRPC_ARES 1
+#endif
+#endif
+
 #ifndef GRPC_MUST_USE_RESULT
 #if defined(__GNUC__) && !defined(__MINGW32__)
 #define GRPC_MUST_USE_RESULT __attribute__((warn_unused_result))
diff --git a/package.json b/package.json
index 8c0854b..666e819 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "electron-build": "./node_modules/.bin/node-pre-gyp configure build --runtime=electron --disturl=https://atom.io/download/atom-shell",
     "gen_docs": "./node_modules/.bin/jsdoc -c src/node/jsdoc_conf.json",
     "coverage": "./node_modules/.bin/istanbul cover ./node_modules/.bin/_mocha src/node/test",
-    "install": "./node_modules/.bin/node-pre-gyp install --fallback-to-build"
+    "install": "./node_modules/.bin/node-pre-gyp install --fallback-to-build --library=static_library"
   },
   "bundledDependencies": [
     "node-pre-gyp"
@@ -34,7 +34,8 @@
     "lodash": "^4.15.0",
     "nan": "^2.0.0",
     "node-pre-gyp": "^0.6.0",
-    "protobufjs": "^5.0.0"
+    "protobufjs": "^5.0.0",
+    "cares": "^1.1.5"
   },
   "devDependencies": {
     "async": "^2.0.1",
@@ -52,7 +53,7 @@
     "poisson-process": "^0.2.1"
   },
   "engines": {
-    "node": ">=1.1.0"
+    "node": ">=4"
   },
   "binary": {
     "module_name": "grpc_node",
diff --git a/package.xml b/package.xml
index f096869..5d58584 100644
--- a/package.xml
+++ b/package.xml
@@ -230,6 +230,7 @@
     <file baseinstalldir="/" name="src/core/lib/iomgr/sockaddr_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/sockaddr_utils.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/sockaddr_windows.h" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/iomgr/socket_factory_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/socket_mutator.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/socket_utils.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/socket_utils_posix.h" role="src" />
@@ -269,6 +270,7 @@
     <file baseinstalldir="/" name="src/core/lib/surface/channel_init.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/channel_stack_type.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/completion_queue.h" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/surface/completion_queue_factory.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/event_string.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/init.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/lame_client.h" role="src" />
@@ -360,6 +362,8 @@
     <file baseinstalldir="/" name="third_party/nanopb/pb_common.h" role="src" />
     <file baseinstalldir="/" name="third_party/nanopb/pb_decode.h" role="src" />
     <file baseinstalldir="/" name="third_party/nanopb/pb_encode.h" role="src" />
+    <file baseinstalldir="/" name="src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h" role="src" />
+    <file baseinstalldir="/" name="src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h" role="src" />
     <file baseinstalldir="/" name="src/core/ext/load_reporting/load_reporting.h" role="src" />
     <file baseinstalldir="/" name="src/core/ext/load_reporting/load_reporting_filter.h" role="src" />
     <file baseinstalldir="/" name="src/core/ext/census/aggregation.h" role="src" />
@@ -426,6 +430,7 @@
     <file baseinstalldir="/" name="src/core/lib/iomgr/resolve_address_windows.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/resource_quota.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/sockaddr_utils.c" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/iomgr/socket_factory_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/socket_mutator.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/socket_utils_common_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/socket_utils_linux.c" role="src" />
@@ -463,6 +468,7 @@
     <file baseinstalldir="/" name="src/core/lib/json/json_reader.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/json/json_string.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/json/json_writer.c" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/security/util/b64.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/slice/percent_encoding.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/slice/slice.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/slice/slice_buffer.c" role="src" />
@@ -481,6 +487,7 @@
     <file baseinstalldir="/" name="src/core/lib/surface/channel_ping.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/channel_stack_type.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/completion_queue.c" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/surface/completion_queue_factory.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/event_string.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/lame_client.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/metadata_array.c" role="src" />
@@ -544,7 +551,6 @@
     <file baseinstalldir="/" name="src/core/lib/security/transport/security_handshaker.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/security/transport/server_auth_filter.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/security/transport/tsi_error.c" role="src" />
-    <file baseinstalldir="/" name="src/core/lib/security/util/b64.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/security/util/json_util.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/init_secure.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/tsi/fake_transport_security.c" role="src" />
@@ -586,6 +592,9 @@
     <file baseinstalldir="/" name="third_party/nanopb/pb_encode.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/lb_policy/pick_first/pick_first.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/lb_policy/round_robin/round_robin.c" role="src" />
+    <file baseinstalldir="/" name="src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c" role="src" />
+    <file baseinstalldir="/" name="src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/resolver/dns/native/dns_resolver.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/resolver/sockaddr/sockaddr_resolver.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/load_reporting/load_reporting.c" role="src" />
diff --git a/setup.py b/setup.py
index 4d71848..e050646 100644
--- a/setup.py
+++ b/setup.py
@@ -52,6 +52,13 @@
 CORE_INCLUDE = ('include', '.',)
 BORINGSSL_INCLUDE = (os.path.join('third_party', 'boringssl', 'include'),)
 ZLIB_INCLUDE = (os.path.join('third_party', 'zlib'),)
+CARES_INCLUDE = (
+    os.path.join('third_party', 'cares'),
+    os.path.join('third_party', 'cares', 'cares'),)
+if 'linux' in sys.platform:
+  CARES_INCLUDE += (os.path.join('third_party', 'cares', 'config_linux'),)
+if 'darwin' in sys.platform:
+  CARES_INCLUDE += (os.path.join('third_party', 'cares', 'config_darwin'),)
 README = os.path.join(PYTHON_STEM, 'README.rst')
 
 # Ensure we're in the proper directory whether or not we're being used by pip.
@@ -136,7 +143,8 @@
 CORE_C_FILES = tuple(grpc_core_dependencies.CORE_SOURCE_FILES)
 
 EXTENSION_INCLUDE_DIRECTORIES = (
-    (PYTHON_STEM,) + CORE_INCLUDE + BORINGSSL_INCLUDE + ZLIB_INCLUDE)
+    (PYTHON_STEM,) + CORE_INCLUDE + BORINGSSL_INCLUDE + ZLIB_INCLUDE +
+    CARES_INCLUDE)
 
 EXTENSION_LIBRARIES = ()
 if "linux" in sys.platform:
@@ -150,13 +158,15 @@
     ('OPENSSL_NO_ASM', 1), ('_WIN32_WINNT', 0x600),
     ('GPR_BACKWARDS_COMPATIBILITY_MODE', 1),)
 if "win32" in sys.platform:
-  DEFINE_MACROS += (('WIN32_LEAN_AND_MEAN', 1),)
+  DEFINE_MACROS += (('WIN32_LEAN_AND_MEAN', 1), ('CARES_STATICLIB', 1),)
   if '64bit' in platform.architecture()[0]:
     DEFINE_MACROS += (('MS_WIN64', 1),)
   elif sys.version_info >= (3, 5):
     # For some reason, this is needed to get access to inet_pton/inet_ntop
     # on msvc, but only for 32 bits
     DEFINE_MACROS += (('NTDDI_VERSION', 0x06000000),)
+else:
+  DEFINE_MACROS += (('HAVE_CONFIG_H', 1),)
 
 LDFLAGS = tuple(EXTRA_LINK_ARGS)
 CFLAGS = tuple(EXTRA_COMPILE_ARGS)
@@ -264,6 +274,10 @@
 setuptools.setup(
   name='grpcio',
   version=grpc_version.VERSION,
+  description='HTTP/2-based RPC framework',
+  author='The gRPC Authors',
+  author_email='grpc-io@googlegroups.com',
+  url='http://www.grpc.io',
   license=LICENSE,
   long_description=open(README).read(),
   ext_modules=CYTHON_EXTENSION_MODULES,
diff --git a/src/c-ares/CMakeLists.txt b/src/c-ares/CMakeLists.txt
new file mode 100644
index 0000000..22acd51
--- /dev/null
+++ b/src/c-ares/CMakeLists.txt
@@ -0,0 +1,49 @@
+# c-ares cmake file for gRPC
+#
+# This is currently very experimental, and unsupported.
+#
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+string(TOLOWER ${CMAKE_SYSTEM_NAME} cares_system_name)
+
+include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../../third_party/cares)
+include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../../third_party/cares/cares)
+
+if(${cares_system_name} MATCHES windows)
+  add_definitions(-DCARES_STATICLIB=1)
+  add_definitions(-DWIN32_LEAN_AND_MEAN=1)
+else()
+  include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../../third_party/cares/config_${cares_system_name})
+  add_definitions(-DHAVE_CONFIG_H=1)
+  add_definitions(-D_GNU_SOURCE=1)
+endif()
+
+file(GLOB lib_sources ../../third_party/cares/cares/*.c)
+add_library(cares ${lib_sources})
diff --git a/src/c-ares/gen_build_yaml.py b/src/c-ares/gen_build_yaml.py
new file mode 100755
index 0000000..b2ae971
--- /dev/null
+++ b/src/c-ares/gen_build_yaml.py
@@ -0,0 +1,149 @@
+#!/usr/bin/env python2.7
+
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import re
+import os
+import sys
+import yaml
+
+os.chdir(os.path.dirname(sys.argv[0])+'/../..')
+
+out = {}
+
+try:
+  def gen_ares_build(x):
+    subprocess.call("third_party/cares/cares/buildconf", shell=True)
+    subprocess.call("third_party/cares/cares/configure", shell=True)
+
+  def config_platform(x):
+    if 'linux' in sys.platform:
+      return 'src/cares/cares/config_linux/ares_config.h'
+    if 'darwin' in sys.platform:
+      return 'src/cares/cares/config_darwin/ares_config.h'
+    if not os.path.isfile('third_party/cares/cares/ares_config.h'):
+      gen_ares_build(x)
+    return 'third_party/cares/cares/ares_config.h'
+
+  def ares_build(x):
+    if os.path.isfile('src/cares/cares/ares_build.h'):
+      return 'src/cares/cares/ares_build.h'
+    if not os.path.isfile('third_party/cares/cares/ares_build.h'):
+      gen_ares_build(x)
+    return 'third_party/cares/cares/ares_build.h'
+
+  out['libs'] = [{
+      'name': 'ares',
+      'defaults': 'ares',
+      'build': 'private',
+      'language': 'c',
+      'secure': 'no',
+      'src': [
+        "third_party/cares/cares/ares__close_sockets.c",
+        "third_party/cares/cares/ares__get_hostent.c",
+        "third_party/cares/cares/ares__read_line.c",
+        "third_party/cares/cares/ares__timeval.c",
+        "third_party/cares/cares/ares_cancel.c",
+        "third_party/cares/cares/ares_create_query.c",
+        "third_party/cares/cares/ares_data.c",
+        "third_party/cares/cares/ares_destroy.c",
+        "third_party/cares/cares/ares_expand_name.c",
+        "third_party/cares/cares/ares_expand_string.c",
+        "third_party/cares/cares/ares_fds.c",
+        "third_party/cares/cares/ares_free_hostent.c",
+        "third_party/cares/cares/ares_free_string.c",
+        "third_party/cares/cares/ares_getenv.c",
+        "third_party/cares/cares/ares_gethostbyaddr.c",
+        "third_party/cares/cares/ares_gethostbyname.c",
+        "third_party/cares/cares/ares_getnameinfo.c",
+        "third_party/cares/cares/ares_getopt.c",
+        "third_party/cares/cares/ares_getsock.c",
+        "third_party/cares/cares/ares_init.c",
+        "third_party/cares/cares/ares_library_init.c",
+        "third_party/cares/cares/ares_llist.c",
+        "third_party/cares/cares/ares_mkquery.c",
+        "third_party/cares/cares/ares_nowarn.c",
+        "third_party/cares/cares/ares_options.c",
+        "third_party/cares/cares/ares_parse_a_reply.c",
+        "third_party/cares/cares/ares_parse_aaaa_reply.c",
+        "third_party/cares/cares/ares_parse_mx_reply.c",
+        "third_party/cares/cares/ares_parse_naptr_reply.c",
+        "third_party/cares/cares/ares_parse_ns_reply.c",
+        "third_party/cares/cares/ares_parse_ptr_reply.c",
+        "third_party/cares/cares/ares_parse_soa_reply.c",
+        "third_party/cares/cares/ares_parse_srv_reply.c",
+        "third_party/cares/cares/ares_parse_txt_reply.c",
+        "third_party/cares/cares/ares_platform.c",
+        "third_party/cares/cares/ares_process.c",
+        "third_party/cares/cares/ares_query.c",
+        "third_party/cares/cares/ares_search.c",
+        "third_party/cares/cares/ares_send.c",
+        "third_party/cares/cares/ares_strcasecmp.c",
+        "third_party/cares/cares/ares_strdup.c",
+        "third_party/cares/cares/ares_strerror.c",
+        "third_party/cares/cares/ares_timeout.c",
+        "third_party/cares/cares/ares_version.c",
+        "third_party/cares/cares/ares_writev.c",
+        "third_party/cares/cares/bitncmp.c",
+        "third_party/cares/cares/inet_net_pton.c",
+        "third_party/cares/cares/inet_ntop.c",
+        "third_party/cares/cares/windows_port.c",
+      ],
+      'headers': [
+        "third_party/cares/cares/ares.h",
+        "third_party/cares/cares/ares_data.h",
+        "third_party/cares/cares/ares_dns.h",
+        "third_party/cares/cares/ares_getenv.h",
+        "third_party/cares/cares/ares_getopt.h",
+        "third_party/cares/cares/ares_inet_net_pton.h",
+        "third_party/cares/cares/ares_iphlpapi.h",
+        "third_party/cares/cares/ares_ipv6.h",
+        "third_party/cares/cares/ares_library_init.h",
+        "third_party/cares/cares/ares_llist.h",
+        "third_party/cares/cares/ares_nowarn.h",
+        "third_party/cares/cares/ares_platform.h",
+        "third_party/cares/cares/ares_private.h",
+        "third_party/cares/cares/ares_rules.h",
+        "third_party/cares/cares/ares_setup.h",
+        "third_party/cares/cares/ares_strcasecmp.h",
+        "third_party/cares/cares/ares_strdup.h",
+        "third_party/cares/cares/ares_version.h",
+        "third_party/cares/cares/bitncmp.h",
+        "third_party/cares/cares/config-win32.h",
+        "third_party/cares/cares/setup_once.h",
+        "third_party/cares/ares_build.h",
+        "third_party/cares/config_linux/ares_config.h",
+        "third_party/cares/config_darwin/ares_config.h"
+    ],
+  }]
+except:
+  pass
+
+print yaml.dump(out)
diff --git a/src/compiler/csharp_generator.cc b/src/compiler/csharp_generator.cc
index cc7a7a9..ce1e6b9 100644
--- a/src/compiler/csharp_generator.cc
+++ b/src/compiler/csharp_generator.cc
@@ -203,13 +203,13 @@
 std::string GetCSharpMethodType(MethodType method_type) {
   switch (method_type) {
     case METHODTYPE_NO_STREAMING:
-      return "MethodType.Unary";
+      return "grpc::MethodType.Unary";
     case METHODTYPE_CLIENT_STREAMING:
-      return "MethodType.ClientStreaming";
+      return "grpc::MethodType.ClientStreaming";
     case METHODTYPE_SERVER_STREAMING:
-      return "MethodType.ServerStreaming";
+      return "grpc::MethodType.ServerStreaming";
     case METHODTYPE_BIDI_STREAMING:
-      return "MethodType.DuplexStreaming";
+      return "grpc::MethodType.DuplexStreaming";
   }
   GOOGLE_LOG(FATAL) << "Can't get here.";
   return "";
@@ -243,16 +243,19 @@
 std::string GetMethodReturnTypeClient(const MethodDescriptor *method) {
   switch (GetMethodType(method)) {
     case METHODTYPE_NO_STREAMING:
-      return "AsyncUnaryCall<" + GetClassName(method->output_type()) + ">";
-    case METHODTYPE_CLIENT_STREAMING:
-      return "AsyncClientStreamingCall<" + GetClassName(method->input_type()) +
-             ", " + GetClassName(method->output_type()) + ">";
-    case METHODTYPE_SERVER_STREAMING:
-      return "AsyncServerStreamingCall<" + GetClassName(method->output_type()) +
+      return "grpc::AsyncUnaryCall<" + GetClassName(method->output_type()) +
              ">";
+    case METHODTYPE_CLIENT_STREAMING:
+      return "grpc::AsyncClientStreamingCall<" +
+             GetClassName(method->input_type()) + ", " +
+             GetClassName(method->output_type()) + ">";
+    case METHODTYPE_SERVER_STREAMING:
+      return "grpc::AsyncServerStreamingCall<" +
+             GetClassName(method->output_type()) + ">";
     case METHODTYPE_BIDI_STREAMING:
-      return "AsyncDuplexStreamingCall<" + GetClassName(method->input_type()) +
-             ", " + GetClassName(method->output_type()) + ">";
+      return "grpc::AsyncDuplexStreamingCall<" +
+             GetClassName(method->input_type()) + ", " +
+             GetClassName(method->output_type()) + ">";
   }
   GOOGLE_LOG(FATAL) << "Can't get here.";
   return "";
@@ -265,7 +268,7 @@
       return GetClassName(method->input_type()) + " request";
     case METHODTYPE_CLIENT_STREAMING:
     case METHODTYPE_BIDI_STREAMING:
-      return "IAsyncStreamReader<" + GetClassName(method->input_type()) +
+      return "grpc::IAsyncStreamReader<" + GetClassName(method->input_type()) +
              "> requestStream";
   }
   GOOGLE_LOG(FATAL) << "Can't get here.";
@@ -293,8 +296,8 @@
       return "";
     case METHODTYPE_SERVER_STREAMING:
     case METHODTYPE_BIDI_STREAMING:
-      return ", IServerStreamWriter<" + GetClassName(method->output_type()) +
-             "> responseStream";
+      return ", grpc::IServerStreamWriter<" +
+             GetClassName(method->output_type()) + "> responseStream";
   }
   GOOGLE_LOG(FATAL) << "Can't get here.";
   return "";
@@ -325,8 +328,8 @@
   for (size_t i = 0; i < used_messages.size(); i++) {
     const Descriptor *message = used_messages[i];
     out->Print(
-        "static readonly Marshaller<$type$> $fieldname$ = "
-        "Marshallers.Create((arg) => "
+        "static readonly grpc::Marshaller<$type$> $fieldname$ = "
+        "grpc::Marshallers.Create((arg) => "
         "global::Google.Protobuf.MessageExtensions.ToByteArray(arg), "
         "$type$.Parser.ParseFrom);\n",
         "fieldname", GetMarshallerFieldName(message), "type",
@@ -337,8 +340,8 @@
 
 void GenerateStaticMethodField(Printer *out, const MethodDescriptor *method) {
   out->Print(
-      "static readonly Method<$request$, $response$> $fieldname$ = new "
-      "Method<$request$, $response$>(\n",
+      "static readonly grpc::Method<$request$, $response$> $fieldname$ = new "
+      "grpc::Method<$request$, $response$>(\n",
       "fieldname", GetMethodFieldName(method), "request",
       GetClassName(method->input_type()), "response",
       GetClassName(method->output_type()));
@@ -389,7 +392,7 @@
     out->Print(
         "public virtual $returntype$ "
         "$methodname$($request$$response_stream_maybe$, "
-        "ServerCallContext context)\n",
+        "grpc::ServerCallContext context)\n",
         "methodname", method->name(), "returntype",
         GetMethodReturnTypeServer(method), "request",
         GetMethodRequestParamServer(method), "response_stream_maybe",
@@ -397,8 +400,8 @@
     out->Print("{\n");
     out->Indent();
     out->Print(
-        "throw new RpcException("
-        "new Status(StatusCode.Unimplemented, \"\"));\n");
+        "throw new grpc::RpcException("
+        "new grpc::Status(grpc::StatusCode.Unimplemented, \"\"));\n");
     out->Outdent();
     out->Print("}\n\n");
   }
@@ -410,7 +413,7 @@
 void GenerateClientStub(Printer *out, const ServiceDescriptor *service) {
   out->Print("/// <summary>Client for $servicename$</summary>\n", "servicename",
              GetServiceClassName(service));
-  out->Print("public partial class $name$ : ClientBase<$name$>\n", "name",
+  out->Print("public partial class $name$ : grpc::ClientBase<$name$>\n", "name",
              GetClientClassName(service));
   out->Print("{\n");
   out->Indent();
@@ -421,7 +424,7 @@
       "/// <param name=\"channel\">The channel to use to make remote "
       "calls.</param>\n",
       "servicename", GetServiceClassName(service));
-  out->Print("public $name$(Channel channel) : base(channel)\n", "name",
+  out->Print("public $name$(grpc::Channel channel) : base(channel)\n", "name",
              GetClientClassName(service));
   out->Print("{\n");
   out->Print("}\n");
@@ -431,8 +434,9 @@
       "/// <param name=\"callInvoker\">The callInvoker to use to make remote "
       "calls.</param>\n",
       "servicename", GetServiceClassName(service));
-  out->Print("public $name$(CallInvoker callInvoker) : base(callInvoker)\n",
-             "name", GetClientClassName(service));
+  out->Print(
+      "public $name$(grpc::CallInvoker callInvoker) : base(callInvoker)\n",
+      "name", GetClientClassName(service));
   out->Print("{\n");
   out->Print("}\n");
   out->Print(
@@ -461,7 +465,8 @@
       // unary calls have an extra synchronous stub method
       GenerateDocCommentClientMethod(out, method, true, false);
       out->Print(
-          "public virtual $response$ $methodname$($request$ request, Metadata "
+          "public virtual $response$ $methodname$($request$ request, "
+          "grpc::Metadata "
           "headers = null, DateTime? deadline = null, CancellationToken "
           "cancellationToken = default(CancellationToken))\n",
           "methodname", method->name(), "request",
@@ -470,7 +475,8 @@
       out->Print("{\n");
       out->Indent();
       out->Print(
-          "return $methodname$(request, new CallOptions(headers, deadline, "
+          "return $methodname$(request, new grpc::CallOptions(headers, "
+          "deadline, "
           "cancellationToken));\n",
           "methodname", method->name());
       out->Outdent();
@@ -480,7 +486,7 @@
       GenerateDocCommentClientMethod(out, method, true, true);
       out->Print(
           "public virtual $response$ $methodname$($request$ request, "
-          "CallOptions options)\n",
+          "grpc::CallOptions options)\n",
           "methodname", method->name(), "request",
           GetClassName(method->input_type()), "response",
           GetClassName(method->output_type()));
@@ -500,7 +506,8 @@
     }
     GenerateDocCommentClientMethod(out, method, false, false);
     out->Print(
-        "public virtual $returntype$ $methodname$($request_maybe$Metadata "
+        "public virtual $returntype$ "
+        "$methodname$($request_maybe$grpc::Metadata "
         "headers = null, DateTime? deadline = null, CancellationToken "
         "cancellationToken = default(CancellationToken))\n",
         "methodname", method_name, "request_maybe",
@@ -510,7 +517,8 @@
     out->Indent();
 
     out->Print(
-        "return $methodname$($request_maybe$new CallOptions(headers, deadline, "
+        "return $methodname$($request_maybe$new grpc::CallOptions(headers, "
+        "deadline, "
         "cancellationToken));\n",
         "methodname", method_name, "request_maybe",
         GetMethodRequestParamMaybe(method, true));
@@ -520,7 +528,8 @@
     // overload taking CallOptions as a param
     GenerateDocCommentClientMethod(out, method, false, true);
     out->Print(
-        "public virtual $returntype$ $methodname$($request_maybe$CallOptions "
+        "public virtual $returntype$ "
+        "$methodname$($request_maybe$grpc::CallOptions "
         "options)\n",
         "methodname", method_name, "request_maybe",
         GetMethodRequestParamMaybe(method), "returntype",
@@ -587,13 +596,13 @@
       "/// <param name=\"serviceImpl\">An object implementing the server-side"
       " handling logic.</param>\n");
   out->Print(
-      "public static ServerServiceDefinition BindService($implclass$ "
+      "public static grpc::ServerServiceDefinition BindService($implclass$ "
       "serviceImpl)\n",
       "implclass", GetServerClassName(service));
   out->Print("{\n");
   out->Indent();
 
-  out->Print("return ServerServiceDefinition.CreateBuilder()\n");
+  out->Print("return grpc::ServerServiceDefinition.CreateBuilder()\n");
   out->Indent();
   out->Indent();
   for (int i = 0; i < service->method_count(); i++) {
@@ -681,7 +690,7 @@
     out.Print("using System;\n");
     out.Print("using System.Threading;\n");
     out.Print("using System.Threading.Tasks;\n");
-    out.Print("using Grpc.Core;\n");
+    out.Print("using grpc = global::Grpc.Core;\n");
     out.Print("\n");
 
     out.Print("namespace $namespace$ {\n", "namespace", GetFileNamespace(file));
diff --git a/src/compiler/php_generator.cc b/src/compiler/php_generator.cc
index fba8cba..7d51d40 100644
--- a/src/compiler/php_generator.cc
+++ b/src/compiler/php_generator.cc
@@ -118,7 +118,7 @@
   out->Print(
       "/**\n * @param string $$hostname hostname\n"
       " * @param array $$opts channel options\n"
-      " * @param Grpc\\Channel $$channel (optional) re-use channel "
+      " * @param \\Grpc\\Channel $$channel (optional) re-use channel "
       "object\n */\n"
       "public function __construct($$hostname, $$opts, "
       "$$channel = null) {\n");
diff --git a/src/core/ext/client_channel/resolver_registry.c b/src/core/ext/client_channel/resolver_registry.c
index 3c5a6fb..0f074a3 100644
--- a/src/core/ext/client_channel/resolver_registry.c
+++ b/src/core/ext/client_channel/resolver_registry.c
@@ -93,7 +93,6 @@
       return g_all_of_the_resolvers[i];
     }
   }
-
   return NULL;
 }
 
diff --git a/src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c b/src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c
new file mode 100644
index 0000000..f27da23
--- /dev/null
+++ b/src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c
@@ -0,0 +1,350 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+#if GRPC_ARES == 1 && !defined(GRPC_UV)
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/string_util.h>
+
+#include "src/core/ext/client_channel/http_connect_handshaker.h"
+#include "src/core/ext/client_channel/lb_policy_registry.h"
+#include "src/core/ext/client_channel/resolver_registry.h"
+#include "src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h"
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/iomgr/combiner.h"
+#include "src/core/lib/iomgr/resolve_address.h"
+#include "src/core/lib/iomgr/timer.h"
+#include "src/core/lib/support/backoff.h"
+#include "src/core/lib/support/env.h"
+#include "src/core/lib/support/string.h"
+
+#define GRPC_DNS_MIN_CONNECT_TIMEOUT_SECONDS 1
+#define GRPC_DNS_INITIAL_CONNECT_BACKOFF_SECONDS 1
+#define GRPC_DNS_RECONNECT_BACKOFF_MULTIPLIER 1.6
+#define GRPC_DNS_RECONNECT_MAX_BACKOFF_SECONDS 120
+#define GRPC_DNS_RECONNECT_JITTER 0.2
+
+typedef struct {
+  /** base class: must be first */
+  grpc_resolver base;
+  /** name to resolve (usually the same as target_name) */
+  char *name_to_resolve;
+  /** default port to use */
+  char *default_port;
+  /** channel args. */
+  grpc_channel_args *channel_args;
+  /** pollset_set to drive the name resolution process */
+  grpc_pollset_set *interested_parties;
+
+  /** Closures used by the combiner */
+  grpc_closure dns_ares_on_retry_timer_locked;
+  grpc_closure dns_ares_on_resolved_locked;
+
+  /** Combiner guarding the rest of the state */
+  grpc_combiner *combiner;
+  /** are we currently resolving? */
+  bool resolving;
+  /** which version of the result have we published? */
+  int published_version;
+  /** which version of the result is current? */
+  int resolved_version;
+  /** pending next completion, or NULL */
+  grpc_closure *next_completion;
+  /** target result address for next completion */
+  grpc_channel_args **target_result;
+  /** current (fully resolved) result */
+  grpc_channel_args *resolved_result;
+  /** retry timer */
+  bool have_retry_timer;
+  grpc_timer retry_timer;
+  /** retry backoff state */
+  gpr_backoff backoff_state;
+
+  /** currently resolving addresses */
+  grpc_resolved_addresses *addresses;
+} ares_dns_resolver;
+
+static void dns_ares_destroy(grpc_exec_ctx *exec_ctx, grpc_resolver *r);
+
+static void dns_ares_start_resolving_locked(grpc_exec_ctx *exec_ctx,
+                                            ares_dns_resolver *r);
+static void dns_ares_maybe_finish_next_locked(grpc_exec_ctx *exec_ctx,
+                                              ares_dns_resolver *r);
+
+static void dns_ares_shutdown_locked(grpc_exec_ctx *exec_ctx, grpc_resolver *r);
+static void dns_ares_channel_saw_error_locked(grpc_exec_ctx *exec_ctx,
+                                              grpc_resolver *r);
+static void dns_ares_next_locked(grpc_exec_ctx *exec_ctx, grpc_resolver *r,
+                                 grpc_channel_args **target_result,
+                                 grpc_closure *on_complete);
+
+static const grpc_resolver_vtable dns_ares_resolver_vtable = {
+    dns_ares_destroy, dns_ares_shutdown_locked,
+    dns_ares_channel_saw_error_locked, dns_ares_next_locked};
+
+static void dns_ares_shutdown_locked(grpc_exec_ctx *exec_ctx,
+                                     grpc_resolver *resolver) {
+  ares_dns_resolver *r = (ares_dns_resolver *)resolver;
+  if (r->have_retry_timer) {
+    grpc_timer_cancel(exec_ctx, &r->retry_timer);
+  }
+  if (r->next_completion != NULL) {
+    *r->target_result = NULL;
+    grpc_closure_sched(
+        exec_ctx, r->next_completion,
+        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Resolver Shutdown"));
+    r->next_completion = NULL;
+  }
+}
+
+static void dns_ares_channel_saw_error_locked(grpc_exec_ctx *exec_ctx,
+                                              grpc_resolver *resolver) {
+  ares_dns_resolver *r = (ares_dns_resolver *)resolver;
+  if (!r->resolving) {
+    gpr_backoff_reset(&r->backoff_state);
+    dns_ares_start_resolving_locked(exec_ctx, r);
+  }
+}
+
+static void dns_ares_on_retry_timer_locked(grpc_exec_ctx *exec_ctx, void *arg,
+                                           grpc_error *error) {
+  ares_dns_resolver *r = arg;
+  r->have_retry_timer = false;
+  if (error == GRPC_ERROR_NONE) {
+    if (!r->resolving) {
+      dns_ares_start_resolving_locked(exec_ctx, r);
+    }
+  }
+  GRPC_RESOLVER_UNREF(exec_ctx, &r->base, "retry-timer");
+}
+
+static void dns_ares_on_resolved_locked(grpc_exec_ctx *exec_ctx, void *arg,
+                                        grpc_error *error) {
+  ares_dns_resolver *r = arg;
+  grpc_channel_args *result = NULL;
+  GPR_ASSERT(r->resolving);
+  r->resolving = false;
+  if (r->addresses != NULL) {
+    grpc_lb_addresses *addresses = grpc_lb_addresses_create(
+        r->addresses->naddrs, NULL /* user_data_vtable */);
+    for (size_t i = 0; i < r->addresses->naddrs; ++i) {
+      grpc_lb_addresses_set_address(
+          addresses, i, &r->addresses->addrs[i].addr,
+          r->addresses->addrs[i].len, false /* is_balancer */,
+          NULL /* balancer_name */, NULL /* user_data */);
+    }
+    grpc_arg new_arg = grpc_lb_addresses_create_channel_arg(addresses);
+    result = grpc_channel_args_copy_and_add(r->channel_args, &new_arg, 1);
+    grpc_resolved_addresses_destroy(r->addresses);
+    grpc_lb_addresses_destroy(exec_ctx, addresses);
+  } else {
+    gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
+    gpr_timespec next_try = gpr_backoff_step(&r->backoff_state, now);
+    gpr_timespec timeout = gpr_time_sub(next_try, now);
+    gpr_log(GPR_INFO, "dns resolution failed (will retry): %s",
+            grpc_error_string(error));
+    GPR_ASSERT(!r->have_retry_timer);
+    r->have_retry_timer = true;
+    GRPC_RESOLVER_REF(&r->base, "retry-timer");
+    if (gpr_time_cmp(timeout, gpr_time_0(timeout.clock_type)) > 0) {
+      gpr_log(GPR_DEBUG, "retrying in %" PRId64 ".%09d seconds", timeout.tv_sec,
+              timeout.tv_nsec);
+    } else {
+      gpr_log(GPR_DEBUG, "retrying immediately");
+    }
+    grpc_timer_init(exec_ctx, &r->retry_timer, next_try,
+                    &r->dns_ares_on_retry_timer_locked, now);
+  }
+  if (r->resolved_result != NULL) {
+    grpc_channel_args_destroy(exec_ctx, r->resolved_result);
+  }
+  r->resolved_result = result;
+  r->resolved_version++;
+  dns_ares_maybe_finish_next_locked(exec_ctx, r);
+  GRPC_RESOLVER_UNREF(exec_ctx, &r->base, "dns-resolving");
+}
+
+static void dns_ares_next_locked(grpc_exec_ctx *exec_ctx,
+                                 grpc_resolver *resolver,
+                                 grpc_channel_args **target_result,
+                                 grpc_closure *on_complete) {
+  gpr_log(GPR_DEBUG, "dns_ares_next is called.");
+  ares_dns_resolver *r = (ares_dns_resolver *)resolver;
+  GPR_ASSERT(!r->next_completion);
+  r->next_completion = on_complete;
+  r->target_result = target_result;
+  if (r->resolved_version == 0 && !r->resolving) {
+    gpr_backoff_reset(&r->backoff_state);
+    dns_ares_start_resolving_locked(exec_ctx, r);
+  } else {
+    dns_ares_maybe_finish_next_locked(exec_ctx, r);
+  }
+}
+
+static void dns_ares_start_resolving_locked(grpc_exec_ctx *exec_ctx,
+                                            ares_dns_resolver *r) {
+  GRPC_RESOLVER_REF(&r->base, "dns-resolving");
+  GPR_ASSERT(!r->resolving);
+  r->resolving = true;
+  r->addresses = NULL;
+  grpc_resolve_address(exec_ctx, r->name_to_resolve, r->default_port,
+                       r->interested_parties, &r->dns_ares_on_resolved_locked,
+                       &r->addresses);
+}
+
+static void dns_ares_maybe_finish_next_locked(grpc_exec_ctx *exec_ctx,
+                                              ares_dns_resolver *r) {
+  if (r->next_completion != NULL &&
+      r->resolved_version != r->published_version) {
+    *r->target_result = r->resolved_result == NULL
+                            ? NULL
+                            : grpc_channel_args_copy(r->resolved_result);
+    grpc_closure_sched(exec_ctx, r->next_completion, GRPC_ERROR_NONE);
+    r->next_completion = NULL;
+    r->published_version = r->resolved_version;
+  }
+}
+
+static void dns_ares_destroy(grpc_exec_ctx *exec_ctx, grpc_resolver *gr) {
+  gpr_log(GPR_DEBUG, "dns_ares_destroy");
+  ares_dns_resolver *r = (ares_dns_resolver *)gr;
+  if (r->resolved_result != NULL) {
+    grpc_channel_args_destroy(exec_ctx, r->resolved_result);
+  }
+  grpc_pollset_set_destroy(exec_ctx, r->interested_parties);
+  gpr_free(r->name_to_resolve);
+  gpr_free(r->default_port);
+  grpc_channel_args_destroy(exec_ctx, r->channel_args);
+  gpr_free(r);
+}
+
+static grpc_resolver *dns_ares_create(grpc_exec_ctx *exec_ctx,
+                                      grpc_resolver_args *args,
+                                      const char *default_port) {
+  // Get name from args.
+  const char *path = args->uri->path;
+  if (0 != strcmp(args->uri->authority, "")) {
+    gpr_log(GPR_ERROR, "authority based dns uri's not supported");
+    return NULL;
+  }
+  if (path[0] == '/') ++path;
+  // Create resolver.
+  ares_dns_resolver *r = gpr_zalloc(sizeof(ares_dns_resolver));
+  grpc_resolver_init(&r->base, &dns_ares_resolver_vtable, args->combiner);
+  r->name_to_resolve = gpr_strdup(path);
+  r->default_port = gpr_strdup(default_port);
+  r->channel_args = grpc_channel_args_copy(args->args);
+  r->interested_parties = grpc_pollset_set_create();
+  if (args->pollset_set != NULL) {
+    grpc_pollset_set_add_pollset_set(exec_ctx, r->interested_parties,
+                                     args->pollset_set);
+  }
+  gpr_backoff_init(&r->backoff_state, GRPC_DNS_INITIAL_CONNECT_BACKOFF_SECONDS,
+                   GRPC_DNS_RECONNECT_BACKOFF_MULTIPLIER,
+                   GRPC_DNS_RECONNECT_JITTER,
+                   GRPC_DNS_MIN_CONNECT_TIMEOUT_SECONDS * 1000,
+                   GRPC_DNS_RECONNECT_MAX_BACKOFF_SECONDS * 1000);
+  grpc_closure_init(&r->dns_ares_on_retry_timer_locked,
+                    dns_ares_on_retry_timer_locked, r,
+                    grpc_combiner_scheduler(r->base.combiner, false));
+  grpc_closure_init(&r->dns_ares_on_resolved_locked,
+                    dns_ares_on_resolved_locked, r,
+                    grpc_combiner_scheduler(r->base.combiner, false));
+  return &r->base;
+}
+
+/*
+ * FACTORY
+ */
+
+static void dns_ares_factory_ref(grpc_resolver_factory *factory) {}
+
+static void dns_ares_factory_unref(grpc_resolver_factory *factory) {}
+
+static grpc_resolver *dns_factory_create_resolver(
+    grpc_exec_ctx *exec_ctx, grpc_resolver_factory *factory,
+    grpc_resolver_args *args) {
+  return dns_ares_create(exec_ctx, args, "https");
+}
+
+static char *dns_ares_factory_get_default_host_name(
+    grpc_resolver_factory *factory, grpc_uri *uri) {
+  const char *path = uri->path;
+  if (path[0] == '/') ++path;
+  return gpr_strdup(path);
+}
+
+static const grpc_resolver_factory_vtable dns_ares_factory_vtable = {
+    dns_ares_factory_ref, dns_ares_factory_unref, dns_factory_create_resolver,
+    dns_ares_factory_get_default_host_name, "dns"};
+static grpc_resolver_factory dns_resolver_factory = {&dns_ares_factory_vtable};
+
+static grpc_resolver_factory *dns_ares_resolver_factory_create() {
+  return &dns_resolver_factory;
+}
+
+void grpc_resolver_dns_ares_init(void) {
+  char *resolver = gpr_getenv("GRPC_DNS_RESOLVER");
+  /* TODO(zyc): Turn on c-ares based resolver by default after the address
+     sorter and the CNAME support are added. */
+  if (resolver != NULL && gpr_stricmp(resolver, "ares") == 0) {
+    grpc_error *error = grpc_ares_init();
+    if (error != GRPC_ERROR_NONE) {
+      GRPC_LOG_IF_ERROR("ares_library_init() failed", error);
+      return;
+    }
+    grpc_resolve_address = grpc_resolve_address_ares;
+    grpc_register_resolver_type(dns_ares_resolver_factory_create());
+  }
+  gpr_free(resolver);
+}
+
+void grpc_resolver_dns_ares_shutdown(void) {
+  char *resolver = gpr_getenv("GRPC_DNS_RESOLVER");
+  if (resolver != NULL && gpr_stricmp(resolver, "ares") == 0) {
+    grpc_ares_cleanup();
+  }
+  gpr_free(resolver);
+}
+
+#else /* GRPC_ARES == 1 && !defined(GRPC_UV) */
+
+void grpc_resolver_dns_ares_init(void) {}
+
+void grpc_resolver_dns_ares_shutdown(void) {}
+
+#endif /* GRPC_ARES == 1 && !defined(GRPC_UV) */
diff --git a/src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h b/src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h
new file mode 100644
index 0000000..334feaa
--- /dev/null
+++ b/src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h
@@ -0,0 +1,65 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_EXT_RESOLVER_DNS_C_ARES_GRPC_ARES_EV_DRIVER_H
+#define GRPC_CORE_EXT_RESOLVER_DNS_C_ARES_GRPC_ARES_EV_DRIVER_H
+
+#include <ares.h>
+
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/pollset_set.h"
+
+typedef struct grpc_ares_ev_driver grpc_ares_ev_driver;
+
+/* Start \a ev_driver. It will keep working until all IO on its ares_channel is
+   done, or grpc_ares_ev_driver_destroy() is called. It may notify the callbacks
+   bound to its ares_channel when necessary. */
+void grpc_ares_ev_driver_start(grpc_exec_ctx *exec_ctx,
+                               grpc_ares_ev_driver *ev_driver);
+
+/* Returns the ares_channel owned by \a ev_driver. To bind a c-ares query to
+   \a ev_driver, use the ares_channel owned by \a ev_driver as the arg of the
+   query. */
+ares_channel *grpc_ares_ev_driver_get_channel(grpc_ares_ev_driver *ev_driver);
+
+/* Creates a new grpc_ares_ev_driver. Returns GRPC_ERROR_NONE if \a ev_driver is
+   created successfully. */
+grpc_error *grpc_ares_ev_driver_create(grpc_ares_ev_driver **ev_driver,
+                                       grpc_pollset_set *pollset_set);
+
+/* Destroys \a ev_driver asynchronously. Pending lookups made on \a ev_driver
+   will be cancelled and their on_done callbacks will be invoked with a status
+   of ARES_ECANCELLED. */
+void grpc_ares_ev_driver_destroy(grpc_ares_ev_driver *ev_driver);
+
+#endif /* GRPC_CORE_EXT_RESOLVER_DNS_C_ARES_GRPC_ARES_EV_DRIVER_H */
diff --git a/src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c b/src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c
new file mode 100644
index 0000000..fab4f0c
--- /dev/null
+++ b/src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c
@@ -0,0 +1,319 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include <grpc/support/port_platform.h>
+#include "src/core/lib/iomgr/port.h"
+#if GRPC_ARES == 1 && defined(GRPC_POSIX_SOCKET)
+
+#include "src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/time.h>
+#include <grpc/support/useful.h>
+#include "src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h"
+#include "src/core/lib/iomgr/ev_posix.h"
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/support/string.h"
+
+typedef struct fd_node {
+  /** the owner of this fd node */
+  grpc_ares_ev_driver *ev_driver;
+  /** the grpc_fd owned by this fd node */
+  grpc_fd *grpc_fd;
+  /** a closure wrapping on_readable_cb, which should be invoked when the
+      grpc_fd in this node becomes readable. */
+  grpc_closure read_closure;
+  /** a closure wrapping on_writable_cb, which should be invoked when the
+      grpc_fd in this node becomes writable. */
+  grpc_closure write_closure;
+  /** next fd node in the list */
+  struct fd_node *next;
+
+  /** mutex guarding the rest of the state */
+  gpr_mu mu;
+  /** if the readable closure has been registered */
+  bool readable_registered;
+  /** if the writable closure has been registered */
+  bool writable_registered;
+} fd_node;
+
+struct grpc_ares_ev_driver {
+  /** the ares_channel owned by this event driver */
+  ares_channel channel;
+  /** pollset set for driving the IO events of the channel */
+  grpc_pollset_set *pollset_set;
+  /** refcount of the event driver */
+  gpr_refcount refs;
+
+  /** mutex guarding the rest of the state */
+  gpr_mu mu;
+  /** a list of grpc_fd that this event driver is currently using. */
+  fd_node *fds;
+  /** is this event driver currently working? */
+  bool working;
+  /** is this event driver being shut down */
+  bool shutting_down;
+};
+
+static void grpc_ares_notify_on_event_locked(grpc_exec_ctx *exec_ctx,
+                                             grpc_ares_ev_driver *ev_driver);
+
+static grpc_ares_ev_driver *grpc_ares_ev_driver_ref(
+    grpc_ares_ev_driver *ev_driver) {
+  gpr_log(GPR_DEBUG, "Ref ev_driver %" PRIuPTR, (uintptr_t)ev_driver);
+  gpr_ref(&ev_driver->refs);
+  return ev_driver;
+}
+
+static void grpc_ares_ev_driver_unref(grpc_ares_ev_driver *ev_driver) {
+  gpr_log(GPR_DEBUG, "Unref ev_driver %" PRIuPTR, (uintptr_t)ev_driver);
+  if (gpr_unref(&ev_driver->refs)) {
+    gpr_log(GPR_DEBUG, "destroy ev_driver %" PRIuPTR, (uintptr_t)ev_driver);
+    GPR_ASSERT(ev_driver->fds == NULL);
+    gpr_mu_destroy(&ev_driver->mu);
+    ares_destroy(ev_driver->channel);
+    gpr_free(ev_driver);
+  }
+}
+
+static void fd_node_destroy(grpc_exec_ctx *exec_ctx, fd_node *fdn) {
+  gpr_log(GPR_DEBUG, "delete fd: %d", grpc_fd_wrapped_fd(fdn->grpc_fd));
+  GPR_ASSERT(!fdn->readable_registered);
+  GPR_ASSERT(!fdn->writable_registered);
+  gpr_mu_destroy(&fdn->mu);
+  grpc_pollset_set_del_fd(exec_ctx, fdn->ev_driver->pollset_set, fdn->grpc_fd);
+  grpc_fd_shutdown(exec_ctx, fdn->grpc_fd,
+                   GRPC_ERROR_CREATE_FROM_STATIC_STRING("fd node destroyed"));
+  grpc_fd_orphan(exec_ctx, fdn->grpc_fd, NULL, NULL, "c-ares query finished");
+  gpr_free(fdn);
+}
+
+grpc_error *grpc_ares_ev_driver_create(grpc_ares_ev_driver **ev_driver,
+                                       grpc_pollset_set *pollset_set) {
+  *ev_driver = gpr_malloc(sizeof(grpc_ares_ev_driver));
+  int status = ares_init(&(*ev_driver)->channel);
+  gpr_log(GPR_DEBUG, "grpc_ares_ev_driver_create");
+  if (status != ARES_SUCCESS) {
+    char *err_msg;
+    gpr_asprintf(&err_msg, "Failed to init ares channel. C-ares error: %s",
+                 ares_strerror(status));
+    grpc_error *err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(err_msg);
+    gpr_free(err_msg);
+    gpr_free(*ev_driver);
+    return err;
+  }
+  gpr_mu_init(&(*ev_driver)->mu);
+  gpr_ref_init(&(*ev_driver)->refs, 1);
+  (*ev_driver)->pollset_set = pollset_set;
+  (*ev_driver)->fds = NULL;
+  (*ev_driver)->working = false;
+  (*ev_driver)->shutting_down = false;
+  return GRPC_ERROR_NONE;
+}
+
+void grpc_ares_ev_driver_destroy(grpc_ares_ev_driver *ev_driver) {
+  // It's not safe to shut down remaining fds here directly, becauses
+  // ares_host_callback does not provide an exec_ctx. We mark the event driver
+  // as being shut down. If the event driver is working,
+  // grpc_ares_notify_on_event_locked will shut down the fds; if it's not
+  // working, there are no fds to shut down.
+  gpr_mu_lock(&ev_driver->mu);
+  ev_driver->shutting_down = true;
+  gpr_mu_unlock(&ev_driver->mu);
+  grpc_ares_ev_driver_unref(ev_driver);
+}
+
+// Search fd in the fd_node list head. This is an O(n) search, the max possible
+// value of n is ARES_GETSOCK_MAXNUM (16). n is typically 1 - 2 in our tests.
+static fd_node *pop_fd_node(fd_node **head, int fd) {
+  fd_node dummy_head;
+  dummy_head.next = *head;
+  fd_node *node = &dummy_head;
+  while (node->next != NULL) {
+    if (grpc_fd_wrapped_fd(node->next->grpc_fd) == fd) {
+      fd_node *ret = node->next;
+      node->next = node->next->next;
+      *head = dummy_head.next;
+      return ret;
+    }
+    node = node->next;
+  }
+  return NULL;
+}
+
+static void on_readable_cb(grpc_exec_ctx *exec_ctx, void *arg,
+                           grpc_error *error) {
+  fd_node *fdn = arg;
+  grpc_ares_ev_driver *ev_driver = fdn->ev_driver;
+  gpr_mu_lock(&fdn->mu);
+  fdn->readable_registered = false;
+  gpr_mu_unlock(&fdn->mu);
+
+  gpr_log(GPR_DEBUG, "readable on %d", grpc_fd_wrapped_fd(fdn->grpc_fd));
+  if (error == GRPC_ERROR_NONE) {
+    ares_process_fd(ev_driver->channel, grpc_fd_wrapped_fd(fdn->grpc_fd),
+                    ARES_SOCKET_BAD);
+  } else {
+    // If error is not GRPC_ERROR_NONE, it means the fd has been shutdown or
+    // timed out. The pending lookups made on this ev_driver will be cancelled
+    // by the following ares_cancel() and the on_done callbacks will be invoked
+    // with a status of ARES_ECANCELLED. The remaining file descriptors in this
+    // ev_driver will be cleaned up in the follwing
+    // grpc_ares_notify_on_event_locked().
+    ares_cancel(ev_driver->channel);
+  }
+  gpr_mu_lock(&ev_driver->mu);
+  grpc_ares_notify_on_event_locked(exec_ctx, ev_driver);
+  gpr_mu_unlock(&ev_driver->mu);
+  grpc_ares_ev_driver_unref(ev_driver);
+}
+
+static void on_writable_cb(grpc_exec_ctx *exec_ctx, void *arg,
+                           grpc_error *error) {
+  fd_node *fdn = arg;
+  grpc_ares_ev_driver *ev_driver = fdn->ev_driver;
+  gpr_mu_lock(&fdn->mu);
+  fdn->writable_registered = false;
+  gpr_mu_unlock(&fdn->mu);
+
+  gpr_log(GPR_DEBUG, "writable on %d", grpc_fd_wrapped_fd(fdn->grpc_fd));
+  if (error == GRPC_ERROR_NONE) {
+    ares_process_fd(ev_driver->channel, ARES_SOCKET_BAD,
+                    grpc_fd_wrapped_fd(fdn->grpc_fd));
+  } else {
+    // If error is not GRPC_ERROR_NONE, it means the fd has been shutdown or
+    // timed out. The pending lookups made on this ev_driver will be cancelled
+    // by the following ares_cancel() and the on_done callbacks will be invoked
+    // with a status of ARES_ECANCELLED. The remaining file descriptors in this
+    // ev_driver will be cleaned up in the follwing
+    // grpc_ares_notify_on_event_locked().
+    ares_cancel(ev_driver->channel);
+  }
+  gpr_mu_lock(&ev_driver->mu);
+  grpc_ares_notify_on_event_locked(exec_ctx, ev_driver);
+  gpr_mu_unlock(&ev_driver->mu);
+  grpc_ares_ev_driver_unref(ev_driver);
+}
+
+ares_channel *grpc_ares_ev_driver_get_channel(grpc_ares_ev_driver *ev_driver) {
+  return &ev_driver->channel;
+}
+
+// Get the file descriptors used by the ev_driver's ares channel, register
+// driver_closure with these filedescriptors.
+static void grpc_ares_notify_on_event_locked(grpc_exec_ctx *exec_ctx,
+                                             grpc_ares_ev_driver *ev_driver) {
+  fd_node *new_list = NULL;
+  if (!ev_driver->shutting_down) {
+    ares_socket_t socks[ARES_GETSOCK_MAXNUM];
+    int socks_bitmask =
+        ares_getsock(ev_driver->channel, socks, ARES_GETSOCK_MAXNUM);
+    for (size_t i = 0; i < ARES_GETSOCK_MAXNUM; i++) {
+      if (ARES_GETSOCK_READABLE(socks_bitmask, i) ||
+          ARES_GETSOCK_WRITABLE(socks_bitmask, i)) {
+        fd_node *fdn = pop_fd_node(&ev_driver->fds, socks[i]);
+        // Create a new fd_node if sock[i] is not in the fd_node list.
+        if (fdn == NULL) {
+          char *fd_name;
+          gpr_asprintf(&fd_name, "ares_ev_driver-%" PRIuPTR, i);
+          fdn = gpr_malloc(sizeof(fd_node));
+          gpr_log(GPR_DEBUG, "new fd: %d", socks[i]);
+          fdn->grpc_fd = grpc_fd_create(socks[i], fd_name);
+          fdn->ev_driver = ev_driver;
+          fdn->readable_registered = false;
+          fdn->writable_registered = false;
+          gpr_mu_init(&fdn->mu);
+          grpc_closure_init(&fdn->read_closure, on_readable_cb, fdn,
+                            grpc_schedule_on_exec_ctx);
+          grpc_closure_init(&fdn->write_closure, on_writable_cb, fdn,
+                            grpc_schedule_on_exec_ctx);
+          grpc_pollset_set_add_fd(exec_ctx, ev_driver->pollset_set,
+                                  fdn->grpc_fd);
+          gpr_free(fd_name);
+        }
+        fdn->next = new_list;
+        new_list = fdn;
+        gpr_mu_lock(&fdn->mu);
+        // Register read_closure if the socket is readable and read_closure has
+        // not been registered with this socket.
+        if (ARES_GETSOCK_READABLE(socks_bitmask, i) &&
+            !fdn->readable_registered) {
+          grpc_ares_ev_driver_ref(ev_driver);
+          gpr_log(GPR_DEBUG, "notify read on: %d",
+                  grpc_fd_wrapped_fd(fdn->grpc_fd));
+          grpc_fd_notify_on_read(exec_ctx, fdn->grpc_fd, &fdn->read_closure);
+          fdn->readable_registered = true;
+        }
+        // Register write_closure if the socket is writable and write_closure
+        // has not been registered with this socket.
+        if (ARES_GETSOCK_WRITABLE(socks_bitmask, i) &&
+            !fdn->writable_registered) {
+          gpr_log(GPR_DEBUG, "notify write on: %d",
+                  grpc_fd_wrapped_fd(fdn->grpc_fd));
+          grpc_ares_ev_driver_ref(ev_driver);
+          grpc_fd_notify_on_write(exec_ctx, fdn->grpc_fd, &fdn->write_closure);
+          fdn->writable_registered = true;
+        }
+        gpr_mu_unlock(&fdn->mu);
+      }
+    }
+  }
+  // Any remaining fds in ev_driver->fds were not returned by ares_getsock() and
+  // are therefore no longer in use, so they can be shut down and removed from
+  // the list.
+  while (ev_driver->fds != NULL) {
+    fd_node *cur = ev_driver->fds;
+    ev_driver->fds = ev_driver->fds->next;
+    fd_node_destroy(exec_ctx, cur);
+  }
+  ev_driver->fds = new_list;
+  // If the ev driver has no working fd, all the tasks are done.
+  if (new_list == NULL) {
+    ev_driver->working = false;
+    gpr_log(GPR_DEBUG, "ev driver stop working");
+  }
+}
+
+void grpc_ares_ev_driver_start(grpc_exec_ctx *exec_ctx,
+                               grpc_ares_ev_driver *ev_driver) {
+  gpr_mu_lock(&ev_driver->mu);
+  if (!ev_driver->working) {
+    ev_driver->working = true;
+    grpc_ares_notify_on_event_locked(exec_ctx, ev_driver);
+  }
+  gpr_mu_unlock(&ev_driver->mu);
+}
+
+#endif /* GRPC_ARES == 1 && defined(GRPC_POSIX_SOCKET) */
diff --git a/src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c b/src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c
new file mode 100644
index 0000000..3eee8e3
--- /dev/null
+++ b/src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c
@@ -0,0 +1,289 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+#if GRPC_ARES == 1 && !defined(GRPC_UV)
+
+#include "src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h"
+#include "src/core/lib/iomgr/sockaddr.h"
+#include "src/core/lib/iomgr/socket_utils_posix.h"
+
+#include <string.h>
+#include <sys/types.h>
+
+#include <ares.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/time.h>
+#include <grpc/support/useful.h>
+#include "src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h"
+#include "src/core/lib/iomgr/executor.h"
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/support/string.h"
+
+static gpr_once g_basic_init = GPR_ONCE_INIT;
+static gpr_mu g_init_mu;
+
+typedef struct grpc_ares_request {
+  /** following members are set in grpc_resolve_address_ares_impl */
+  /** host to resolve, parsed from the name to resolve */
+  char *host;
+  /** port to fill in sockaddr_in, parsed from the name to resolve */
+  char *port;
+  /** default port to use */
+  char *default_port;
+  /** closure to call when the request completes */
+  grpc_closure *on_done;
+  /** the pointer to receive the resolved addresses */
+  grpc_resolved_addresses **addrs_out;
+  /** the evernt driver used by this request */
+  grpc_ares_ev_driver *ev_driver;
+  /** number of ongoing queries */
+  gpr_refcount pending_queries;
+
+  /** mutex guarding the rest of the state */
+  gpr_mu mu;
+  /** is there at least one successful query, set in on_done_cb */
+  bool success;
+  /** the errors explaining the request failure, set in on_done_cb */
+  grpc_error *error;
+} grpc_ares_request;
+
+static void do_basic_init(void) { gpr_mu_init(&g_init_mu); }
+
+static uint16_t strhtons(const char *port) {
+  if (strcmp(port, "http") == 0) {
+    return htons(80);
+  } else if (strcmp(port, "https") == 0) {
+    return htons(443);
+  }
+  return htons((unsigned short)atoi(port));
+}
+
+static void grpc_ares_request_unref(grpc_exec_ctx *exec_ctx,
+                                    grpc_ares_request *r) {
+  /* If there are no pending queries, invoke on_done callback and destroy the
+     request */
+  if (gpr_unref(&r->pending_queries)) {
+    /* TODO(zyc): Sort results with RFC6724 before invoking on_done. */
+    if (exec_ctx == NULL) {
+      /* A new exec_ctx is created here, as the c-ares interface does not
+         provide one in ares_host_callback. It's safe to schedule on_done with
+         the newly created exec_ctx, since the caller has been warned not to
+         acquire locks in on_done. ares_dns_resolver is using combiner to
+         protect resources needed by on_done. */
+      grpc_exec_ctx new_exec_ctx = GRPC_EXEC_CTX_INIT;
+      grpc_closure_sched(&new_exec_ctx, r->on_done, r->error);
+      grpc_exec_ctx_finish(&new_exec_ctx);
+    } else {
+      grpc_closure_sched(exec_ctx, r->on_done, r->error);
+    }
+    gpr_mu_destroy(&r->mu);
+    grpc_ares_ev_driver_destroy(r->ev_driver);
+    gpr_free(r->host);
+    gpr_free(r->port);
+    gpr_free(r->default_port);
+    gpr_free(r);
+  }
+}
+
+static void on_done_cb(void *arg, int status, int timeouts,
+                       struct hostent *hostent) {
+  grpc_ares_request *r = (grpc_ares_request *)arg;
+  gpr_mu_lock(&r->mu);
+  if (status == ARES_SUCCESS) {
+    GRPC_ERROR_UNREF(r->error);
+    r->error = GRPC_ERROR_NONE;
+    r->success = true;
+    grpc_resolved_addresses **addresses = r->addrs_out;
+    if (*addresses == NULL) {
+      *addresses = gpr_malloc(sizeof(grpc_resolved_addresses));
+      (*addresses)->naddrs = 0;
+      (*addresses)->addrs = NULL;
+    }
+    size_t prev_naddr = (*addresses)->naddrs;
+    size_t i;
+    for (i = 0; hostent->h_addr_list[i] != NULL; i++) {
+    }
+    (*addresses)->naddrs += i;
+    (*addresses)->addrs =
+        gpr_realloc((*addresses)->addrs,
+                    sizeof(grpc_resolved_address) * (*addresses)->naddrs);
+    for (i = prev_naddr; i < (*addresses)->naddrs; i++) {
+      memset(&(*addresses)->addrs[i], 0, sizeof(grpc_resolved_address));
+      if (hostent->h_addrtype == AF_INET6) {
+        (*addresses)->addrs[i].len = sizeof(struct sockaddr_in6);
+        struct sockaddr_in6 *addr =
+            (struct sockaddr_in6 *)&(*addresses)->addrs[i].addr;
+        addr->sin6_family = (sa_family_t)hostent->h_addrtype;
+        addr->sin6_port = strhtons(r->port);
+
+        char output[INET6_ADDRSTRLEN];
+        memcpy(&addr->sin6_addr, hostent->h_addr_list[i - prev_naddr],
+               sizeof(struct in6_addr));
+        ares_inet_ntop(AF_INET6, &addr->sin6_addr, output, INET6_ADDRSTRLEN);
+        gpr_log(GPR_DEBUG,
+                "c-ares resolver gets a AF_INET6 result: \n"
+                "  addr: %s\n  port: %s\n  sin6_scope_id: %d\n",
+                output, r->port, addr->sin6_scope_id);
+      } else {
+        (*addresses)->addrs[i].len = sizeof(struct sockaddr_in);
+        struct sockaddr_in *addr =
+            (struct sockaddr_in *)&(*addresses)->addrs[i].addr;
+        memcpy(&addr->sin_addr, hostent->h_addr_list[i - prev_naddr],
+               sizeof(struct in_addr));
+        addr->sin_family = (sa_family_t)hostent->h_addrtype;
+        addr->sin_port = strhtons(r->port);
+
+        char output[INET_ADDRSTRLEN];
+        ares_inet_ntop(AF_INET, &addr->sin_addr, output, INET_ADDRSTRLEN);
+        gpr_log(GPR_DEBUG,
+                "c-ares resolver gets a AF_INET result: \n"
+                "  addr: %s\n  port: %s\n",
+                output, r->port);
+      }
+    }
+  } else if (!r->success) {
+    char *error_msg;
+    gpr_asprintf(&error_msg, "C-ares status is not ARES_SUCCESS: %s",
+                 ares_strerror(status));
+    grpc_error *error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(error_msg);
+    gpr_free(error_msg);
+    if (r->error == GRPC_ERROR_NONE) {
+      r->error = error;
+    } else {
+      r->error = grpc_error_add_child(error, r->error);
+    }
+  }
+  gpr_mu_unlock(&r->mu);
+  grpc_ares_request_unref(NULL, r);
+}
+
+void grpc_resolve_address_ares_impl(grpc_exec_ctx *exec_ctx, const char *name,
+                                    const char *default_port,
+                                    grpc_pollset_set *interested_parties,
+                                    grpc_closure *on_done,
+                                    grpc_resolved_addresses **addrs) {
+  /* TODO(zyc): Enable tracing after #9603 is checked in */
+  /* if (grpc_dns_trace) {
+      gpr_log(GPR_DEBUG, "resolve_address (blocking): name=%s, default_port=%s",
+              name, default_port);
+     } */
+
+  /* parse name, splitting it into host and port parts */
+  char *host;
+  char *port;
+  gpr_split_host_port(name, &host, &port);
+  if (host == NULL) {
+    grpc_error *err = grpc_error_set_str(
+        GRPC_ERROR_CREATE_FROM_STATIC_STRING("unparseable host:port"),
+        GRPC_ERROR_STR_TARGET_ADDRESS, grpc_slice_from_copied_string(name));
+    grpc_closure_sched(exec_ctx, on_done, err);
+    goto error_cleanup;
+  } else if (port == NULL) {
+    if (default_port == NULL) {
+      grpc_error *err = grpc_error_set_str(
+          GRPC_ERROR_CREATE_FROM_STATIC_STRING("no port in name"),
+          GRPC_ERROR_STR_TARGET_ADDRESS, grpc_slice_from_copied_string(name));
+      grpc_closure_sched(exec_ctx, on_done, err);
+      goto error_cleanup;
+    }
+    port = gpr_strdup(default_port);
+  }
+
+  grpc_ares_ev_driver *ev_driver;
+  grpc_error *err = grpc_ares_ev_driver_create(&ev_driver, interested_parties);
+  if (err != GRPC_ERROR_NONE) {
+    GRPC_LOG_IF_ERROR("grpc_ares_ev_driver_create() failed", err);
+    goto error_cleanup;
+  }
+
+  grpc_ares_request *r = gpr_malloc(sizeof(grpc_ares_request));
+  gpr_mu_init(&r->mu);
+  r->ev_driver = ev_driver;
+  r->on_done = on_done;
+  r->addrs_out = addrs;
+  r->default_port = gpr_strdup(default_port);
+  r->port = port;
+  r->host = host;
+  r->success = false;
+  r->error = GRPC_ERROR_NONE;
+  ares_channel *channel = grpc_ares_ev_driver_get_channel(r->ev_driver);
+  gpr_ref_init(&r->pending_queries, 2);
+  if (grpc_ipv6_loopback_available()) {
+    gpr_ref(&r->pending_queries);
+    ares_gethostbyname(*channel, r->host, AF_INET6, on_done_cb, r);
+  }
+  ares_gethostbyname(*channel, r->host, AF_INET, on_done_cb, r);
+  /* TODO(zyc): Handle CNAME records here. */
+  grpc_ares_ev_driver_start(exec_ctx, r->ev_driver);
+  grpc_ares_request_unref(exec_ctx, r);
+  return;
+
+error_cleanup:
+  gpr_free(host);
+  gpr_free(port);
+}
+
+void (*grpc_resolve_address_ares)(
+    grpc_exec_ctx *exec_ctx, const char *name, const char *default_port,
+    grpc_pollset_set *interested_parties, grpc_closure *on_done,
+    grpc_resolved_addresses **addrs) = grpc_resolve_address_ares_impl;
+
+grpc_error *grpc_ares_init(void) {
+  gpr_once_init(&g_basic_init, do_basic_init);
+  gpr_mu_lock(&g_init_mu);
+  int status = ares_library_init(ARES_LIB_INIT_ALL);
+  gpr_mu_unlock(&g_init_mu);
+
+  if (status != ARES_SUCCESS) {
+    char *error_msg;
+    gpr_asprintf(&error_msg, "ares_library_init failed: %s",
+                 ares_strerror(status));
+    grpc_error *error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(error_msg);
+    gpr_free(error_msg);
+    return error;
+  }
+  return GRPC_ERROR_NONE;
+}
+
+void grpc_ares_cleanup(void) {
+  gpr_mu_lock(&g_init_mu);
+  ares_library_cleanup();
+  gpr_mu_unlock(&g_init_mu);
+}
+
+#endif /* GRPC_ARES == 1 && !defined(GRPC_UV) */
diff --git a/src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h b/src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h
new file mode 100644
index 0000000..ab00a26
--- /dev/null
+++ b/src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h
@@ -0,0 +1,63 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_EXT_RESOLVER_DNS_C_ARES_GRPC_ARES_WRAPPER_H
+#define GRPC_CORE_EXT_RESOLVER_DNS_C_ARES_GRPC_ARES_WRAPPER_H
+
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/iomgr.h"
+#include "src/core/lib/iomgr/polling_entity.h"
+#include "src/core/lib/iomgr/resolve_address.h"
+
+/* Asynchronously resolve addr. Use \a default_port if a port isn't designated
+   in addr, otherwise use the port in addr. grpc_ares_init() must be called at
+   least once before this function. \a on_done may be called directly in this
+   function without being scheduled with \a exec_ctx, it must not try to acquire
+   locks that are being held by the caller. */
+extern void (*grpc_resolve_address_ares)(grpc_exec_ctx *exec_ctx,
+                                         const char *addr,
+                                         const char *default_port,
+                                         grpc_pollset_set *interested_parties,
+                                         grpc_closure *on_done,
+                                         grpc_resolved_addresses **addresses);
+
+/* Initialize gRPC ares wrapper. Must be called at least once before
+   grpc_resolve_address_ares(). */
+grpc_error *grpc_ares_init(void);
+
+/* Uninitialized gRPC ares wrapper. If there was more than one previous call to
+   grpc_ares_init(), this function uninitializes the gRPC ares wrapper only if
+   it has been called the same number of times as grpc_ares_init(). */
+void grpc_ares_cleanup(void);
+
+#endif /* GRPC_CORE_EXT_RESOLVER_DNS_C_ARES_GRPC_ARES_WRAPPER_H */
diff --git a/src/core/ext/resolver/dns/native/dns_resolver.c b/src/core/ext/resolver/dns/native/dns_resolver.c
index d6cb6a9..97cd048 100644
--- a/src/core/ext/resolver/dns/native/dns_resolver.c
+++ b/src/core/ext/resolver/dns/native/dns_resolver.c
@@ -44,6 +44,7 @@
 #include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/timer.h"
 #include "src/core/lib/support/backoff.h"
+#include "src/core/lib/support/env.h"
 #include "src/core/lib/support/string.h"
 
 #define GRPC_DNS_MIN_CONNECT_TIMEOUT_SECONDS 1
@@ -304,7 +305,21 @@
 }
 
 void grpc_resolver_dns_native_init(void) {
-  grpc_register_resolver_type(dns_resolver_factory_create());
+  char *resolver = gpr_getenv("GRPC_DNS_RESOLVER");
+  if (resolver != NULL && gpr_stricmp(resolver, "native") == 0) {
+    gpr_log(GPR_DEBUG, "Using native dns resolver");
+    grpc_register_resolver_type(dns_resolver_factory_create());
+  } else {
+    grpc_resolver_factory *existing_factory =
+        grpc_resolver_factory_lookup("dns");
+    if (existing_factory == NULL) {
+      gpr_log(GPR_DEBUG, "Using native dns resolver");
+      grpc_register_resolver_type(dns_resolver_factory_create());
+    } else {
+      grpc_resolver_factory_unref(existing_factory);
+    }
+  }
+  gpr_free(resolver);
 }
 
 void grpc_resolver_dns_native_shutdown(void) {}
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index 88d96b1..8676a37 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -1835,7 +1835,7 @@
 
   size_t msg_len = GRPC_SLICE_LENGTH(slice);
   GPR_ASSERT(msg_len <= UINT32_MAX);
-  uint32_t msg_len_len = GRPC_CHTTP2_VARINT_LENGTH((uint32_t)msg_len, 0);
+  uint32_t msg_len_len = GRPC_CHTTP2_VARINT_LENGTH((uint32_t)msg_len, 1);
   message_pfx = grpc_slice_malloc(14 + msg_len_len);
   p = GRPC_SLICE_START_PTR(message_pfx);
   *p++ = 0x00; /* literal header, not indexed */
@@ -1852,7 +1852,7 @@
   *p++ = 'a';
   *p++ = 'g';
   *p++ = 'e';
-  GRPC_CHTTP2_WRITE_VARINT((uint32_t)msg_len, 0, 0, p, (uint32_t)msg_len_len);
+  GRPC_CHTTP2_WRITE_VARINT((uint32_t)msg_len, 1, 0, p, (uint32_t)msg_len_len);
   p += msg_len_len;
   GPR_ASSERT(p == GRPC_SLICE_END_PTR(message_pfx));
   len += (uint32_t)GRPC_SLICE_LENGTH(message_pfx);
diff --git a/src/core/lib/channel/http_client_filter.c b/src/core/lib/channel/http_client_filter.c
index 028e9a5..967904d 100644
--- a/src/core/lib/channel/http_client_filter.c
+++ b/src/core/lib/channel/http_client_filter.c
@@ -36,6 +36,7 @@
 #include <grpc/support/string_util.h>
 #include <string.h>
 #include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/security/util/b64.h"
 #include "src/core/lib/slice/percent_encoding.h"
 #include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/slice/slice_string_helpers.h"
@@ -56,7 +57,6 @@
   grpc_linked_mdelem te_trailers;
   grpc_linked_mdelem content_type;
   grpc_linked_mdelem user_agent;
-  grpc_linked_mdelem payload_bin;
 
   grpc_metadata_batch *recv_initial_metadata;
   grpc_metadata_batch *recv_trailing_metadata;
@@ -292,19 +292,58 @@
       continue_send_message(exec_ctx, elem);
 
       if (calld->send_message_blocked == false) {
-        /* when all the send_message data is available, then create a MDELEM and
-        append to headers */
-        grpc_mdelem payload_bin = grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_GRPC_PAYLOAD_BIN,
-            grpc_slice_from_copied_buffer((const char *)calld->payload_bytes,
-                                          op->send_message->length));
-        error =
-            grpc_metadata_batch_add_tail(exec_ctx, op->send_initial_metadata,
-                                         &calld->payload_bin, payload_bin);
+        /* when all the send_message data is available, then modify the path
+         * MDELEM by appending base64 encoded query to the path */
+        const int k_url_safe = 1;
+        const int k_multi_line = 0;
+        const unsigned char k_query_separator = '?';
+
+        grpc_slice path_slice =
+            GRPC_MDVALUE(op->send_initial_metadata->idx.named.path->md);
+        /* sum up individual component's lengths and allocate enough memory to
+         * hold combined path+query */
+        size_t estimated_len = GRPC_SLICE_LENGTH(path_slice);
+        estimated_len++; /* for the '?' */
+        estimated_len += grpc_base64_estimate_encoded_size(
+            op->send_message->length, k_url_safe, k_multi_line);
+        estimated_len += 1; /* for the trailing 0 */
+        grpc_slice path_with_query_slice = grpc_slice_malloc(estimated_len);
+
+        /* memcopy individual pieces into this slice */
+        uint8_t *write_ptr =
+            (uint8_t *)GRPC_SLICE_START_PTR(path_with_query_slice);
+        uint8_t *original_path = (uint8_t *)GRPC_SLICE_START_PTR(path_slice);
+        memcpy(write_ptr, original_path, GRPC_SLICE_LENGTH(path_slice));
+        write_ptr += GRPC_SLICE_LENGTH(path_slice);
+
+        *write_ptr = k_query_separator;
+        write_ptr++; /* for the '?' */
+
+        grpc_base64_encode_core((char *)write_ptr, calld->payload_bytes,
+                                op->send_message->length, k_url_safe,
+                                k_multi_line);
+
+        /* remove trailing unused memory and add trailing 0 to terminate string
+         */
+        char *t = (char *)GRPC_SLICE_START_PTR(path_with_query_slice);
+        /* safe to use strlen since base64_encode will always add '\0' */
+        size_t path_length = strlen(t) + 1;
+        *(t + path_length) = '\0';
+        path_with_query_slice =
+            grpc_slice_sub(path_with_query_slice, 0, path_length);
+
+        /* substitute previous path with the new path+query */
+        grpc_mdelem mdelem_path_and_query = grpc_mdelem_from_slices(
+            exec_ctx, GRPC_MDSTR_PATH, path_with_query_slice);
+        grpc_metadata_batch *b = op->send_initial_metadata;
+        error = grpc_metadata_batch_substitute(exec_ctx, b, b->idx.named.path,
+                                               mdelem_path_and_query);
         if (error != GRPC_ERROR_NONE) return error;
+
         calld->on_complete = op->on_complete;
         op->on_complete = &calld->hc_on_complete;
         op->send_message = NULL;
+        grpc_slice_unref_internal(exec_ctx, path_with_query_slice);
       } else {
         /* Not all data is available. Fall back to POST. */
         gpr_log(GPR_DEBUG,
diff --git a/src/core/lib/channel/http_server_filter.c b/src/core/lib/channel/http_server_filter.c
index 41a325b..8d3c488 100644
--- a/src/core/lib/channel/http_server_filter.c
+++ b/src/core/lib/channel/http_server_filter.c
@@ -37,6 +37,7 @@
 #include <grpc/support/log.h>
 #include <string.h>
 #include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/security/util/b64.h"
 #include "src/core/lib/slice/percent_encoding.h"
 #include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/slice/slice_string_helpers.h"
@@ -51,8 +52,8 @@
   grpc_linked_mdelem status;
   grpc_linked_mdelem content_type;
 
-  /* did this request come with payload-bin */
-  bool seen_payload_bin;
+  /* did this request come with path query containing request payload */
+  bool seen_path_with_query;
   /* flag to ensure payload_bin is delivered only once */
   bool payload_bin_delivered;
 
@@ -61,7 +62,7 @@
   bool *recv_cacheable_request;
   /** Closure to call when finished with the hs_on_recv hook */
   grpc_closure *on_done_recv;
-  /** Closure to call when we retrieve read message from the payload-bin header
+  /** Closure to call when we retrieve read message from the path URI
    */
   grpc_closure *recv_message_ready;
   grpc_closure *on_complete;
@@ -205,6 +206,43 @@
               grpc_error_set_str(
                   GRPC_ERROR_CREATE_FROM_STATIC_STRING("Missing header"),
                   GRPC_ERROR_STR_KEY, grpc_slice_from_static_string(":path")));
+  } else if (*calld->recv_cacheable_request == true) {
+    /* We have a cacheable request made with GET verb. The path contains the
+     * query parameter which is base64 encoded request payload. */
+    const char k_query_separator = '?';
+    grpc_slice path_slice = GRPC_MDVALUE(b->idx.named.path->md);
+    uint8_t *path_ptr = (uint8_t *)GRPC_SLICE_START_PTR(path_slice);
+    size_t path_length = GRPC_SLICE_LENGTH(path_slice);
+    /* offset of the character '?' */
+    size_t offset = 0;
+    for (offset = 0; *path_ptr != k_query_separator && offset < path_length;
+         path_ptr++, offset++)
+      ;
+    if (offset < path_length) {
+      grpc_slice query_slice =
+          grpc_slice_sub(path_slice, offset + 1, path_length);
+
+      /* substitute path metadata with just the path (not query) */
+      grpc_mdelem mdelem_path_without_query = grpc_mdelem_from_slices(
+          exec_ctx, GRPC_MDSTR_PATH, grpc_slice_sub(path_slice, 0, offset));
+
+      grpc_metadata_batch_substitute(exec_ctx, b, b->idx.named.path,
+                                     mdelem_path_without_query);
+
+      /* decode payload from query and add to the slice buffer to be returned */
+      const int k_url_safe = 1;
+      grpc_slice_buffer_add(
+          &calld->read_slice_buffer,
+          grpc_base64_decode(exec_ctx,
+                             (const char *)GRPC_SLICE_START_PTR(query_slice),
+                             k_url_safe));
+      grpc_slice_buffer_stream_init(&calld->read_stream,
+                                    &calld->read_slice_buffer, 0);
+      calld->seen_path_with_query = true;
+      grpc_slice_unref_internal(exec_ctx, query_slice);
+    } else {
+      gpr_log(GPR_ERROR, "GET request without QUERY");
+    }
   }
 
   if (b->idx.named.host != NULL && b->idx.named.authority == NULL) {
@@ -228,16 +266,6 @@
             GRPC_ERROR_STR_KEY, grpc_slice_from_static_string(":authority")));
   }
 
-  if (b->idx.named.grpc_payload_bin != NULL) {
-    calld->seen_payload_bin = true;
-    grpc_slice_buffer_add(&calld->read_slice_buffer,
-                          grpc_slice_ref_internal(
-                              GRPC_MDVALUE(b->idx.named.grpc_payload_bin->md)));
-    grpc_slice_buffer_stream_init(&calld->read_stream,
-                                  &calld->read_slice_buffer, 0);
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.grpc_payload_bin);
-  }
-
   return error;
 }
 
@@ -258,8 +286,8 @@
                            grpc_error *err) {
   grpc_call_element *elem = user_data;
   call_data *calld = elem->call_data;
-  /* Call recv_message_ready if we got the payload via the header field */
-  if (calld->seen_payload_bin && calld->recv_message_ready != NULL) {
+  /* Call recv_message_ready if we got the payload via the path field */
+  if (calld->seen_path_with_query && calld->recv_message_ready != NULL) {
     *calld->pp_recv_message = calld->payload_bin_delivered
                                   ? NULL
                                   : (grpc_byte_stream *)&calld->read_stream;
@@ -274,7 +302,7 @@
                                   grpc_error *err) {
   grpc_call_element *elem = user_data;
   call_data *calld = elem->call_data;
-  if (calld->seen_payload_bin) {
+  if (calld->seen_path_with_query) {
     /* do nothing. This is probably a GET request, and payload will be returned
     in hs_on_complete callback. */
   } else {
diff --git a/src/core/lib/iomgr/socket_factory_posix.c b/src/core/lib/iomgr/socket_factory_posix.c
new file mode 100644
index 0000000..1050a14
--- /dev/null
+++ b/src/core/lib/iomgr/socket_factory_posix.c
@@ -0,0 +1,110 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/port.h"
+
+#ifdef GRPC_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/socket_factory_posix.h"
+
+#include <grpc/impl/codegen/grpc_types.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/useful.h>
+
+void grpc_socket_factory_init(grpc_socket_factory *factory,
+                              const grpc_socket_factory_vtable *vtable) {
+  factory->vtable = vtable;
+  gpr_ref_init(&factory->refcount, 1);
+}
+
+int grpc_socket_factory_socket(grpc_socket_factory *factory, int domain,
+                               int type, int protocol) {
+  return factory->vtable->socket(factory, domain, type, protocol);
+}
+
+int grpc_socket_factory_bind(grpc_socket_factory *factory, int sockfd,
+                             const grpc_resolved_address *addr) {
+  return factory->vtable->bind(factory, sockfd, addr);
+}
+
+int grpc_socket_factory_compare(grpc_socket_factory *a,
+                                grpc_socket_factory *b) {
+  int c = GPR_ICMP(a, b);
+  if (c != 0) {
+    grpc_socket_factory *sma = a;
+    grpc_socket_factory *smb = b;
+    c = GPR_ICMP(sma->vtable, smb->vtable);
+    if (c == 0) {
+      c = sma->vtable->compare(sma, smb);
+    }
+  }
+  return c;
+}
+
+grpc_socket_factory *grpc_socket_factory_ref(grpc_socket_factory *factory) {
+  gpr_ref(&factory->refcount);
+  return factory;
+}
+
+void grpc_socket_factory_unref(grpc_socket_factory *factory) {
+  if (gpr_unref(&factory->refcount)) {
+    factory->vtable->destroy(factory);
+  }
+}
+
+static void *socket_factory_arg_copy(void *p) {
+  return grpc_socket_factory_ref(p);
+}
+
+static void socket_factory_arg_destroy(grpc_exec_ctx *exec_ctx, void *p) {
+  grpc_socket_factory_unref(p);
+}
+
+static int socket_factory_cmp(void *a, void *b) {
+  return grpc_socket_factory_compare((grpc_socket_factory *)a,
+                                     (grpc_socket_factory *)b);
+}
+
+static const grpc_arg_pointer_vtable socket_factory_arg_vtable = {
+    socket_factory_arg_copy, socket_factory_arg_destroy, socket_factory_cmp};
+
+grpc_arg grpc_socket_factory_to_arg(grpc_socket_factory *factory) {
+  grpc_arg arg;
+  arg.type = GRPC_ARG_POINTER;
+  arg.key = GRPC_ARG_SOCKET_FACTORY;
+  arg.value.pointer.vtable = &socket_factory_arg_vtable;
+  arg.value.pointer.p = factory;
+  return arg;
+}
+
+#endif
diff --git a/src/core/lib/iomgr/socket_factory_posix.h b/src/core/lib/iomgr/socket_factory_posix.h
new file mode 100644
index 0000000..2c63299
--- /dev/null
+++ b/src/core/lib/iomgr/socket_factory_posix.h
@@ -0,0 +1,90 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_SOCKET_FACTORY_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_SOCKET_FACTORY_POSIX_H
+
+#include <grpc/impl/codegen/grpc_types.h>
+#include <grpc/support/sync.h>
+#include "src/core/lib/iomgr/resolve_address.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** The virtual table of grpc_socket_factory */
+typedef struct {
+  /** Replacement for socket(2) */
+  int (*socket)(grpc_socket_factory *factory, int domain, int type,
+                int protocol);
+  /** Replacement for bind(2) */
+  int (*bind)(grpc_socket_factory *factory, int sockfd,
+              const grpc_resolved_address *addr);
+  /** Compare socket factory \a a and \a b */
+  int (*compare)(grpc_socket_factory *a, grpc_socket_factory *b);
+  /** Destroys the socket factory instance */
+  void (*destroy)(grpc_socket_factory *factory);
+} grpc_socket_factory_vtable;
+
+/** The Socket Factory interface allows changes on socket options */
+struct grpc_socket_factory {
+  const grpc_socket_factory_vtable *vtable;
+  gpr_refcount refcount;
+};
+
+/** called by concrete implementations to initialize the base struct */
+void grpc_socket_factory_init(grpc_socket_factory *factory,
+                              const grpc_socket_factory_vtable *vtable);
+
+/** Wrap \a factory as a grpc_arg */
+grpc_arg grpc_socket_factory_to_arg(grpc_socket_factory *factory);
+
+/** Perform the equivalent of a socket(2) operation using \a factory */
+int grpc_socket_factory_socket(grpc_socket_factory *factory, int domain,
+                               int type, int protocol);
+
+/** Perform the equivalent of a bind(2) operation using \a factory */
+int grpc_socket_factory_bind(grpc_socket_factory *factory, int sockfd,
+                             const grpc_resolved_address *addr);
+
+/** Compare if \a a and \a b are the same factory or have same settings */
+int grpc_socket_factory_compare(grpc_socket_factory *a, grpc_socket_factory *b);
+
+grpc_socket_factory *grpc_socket_factory_ref(grpc_socket_factory *factory);
+void grpc_socket_factory_unref(grpc_socket_factory *factory);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_CORE_LIB_IOMGR_SOCKET_FACTORY_POSIX_H */
diff --git a/src/core/lib/iomgr/socket_utils_common_posix.c b/src/core/lib/iomgr/socket_utils_common_posix.c
index b69c924..bbe642d 100644
--- a/src/core/lib/iomgr/socket_utils_common_posix.c
+++ b/src/core/lib/iomgr/socket_utils_common_posix.c
@@ -278,11 +278,25 @@
 grpc_error *grpc_create_dualstack_socket(
     const grpc_resolved_address *resolved_addr, int type, int protocol,
     grpc_dualstack_mode *dsmode, int *newfd) {
+  return grpc_create_dualstack_socket_using_factory(NULL, resolved_addr, type,
+                                                    protocol, dsmode, newfd);
+}
+
+static int create_socket(grpc_socket_factory *factory, int domain, int type,
+                         int protocol) {
+  return (factory != NULL)
+             ? grpc_socket_factory_socket(factory, domain, type, protocol)
+             : socket(domain, type, protocol);
+}
+
+grpc_error *grpc_create_dualstack_socket_using_factory(
+    grpc_socket_factory *factory, const grpc_resolved_address *resolved_addr,
+    int type, int protocol, grpc_dualstack_mode *dsmode, int *newfd) {
   const struct sockaddr *addr = (const struct sockaddr *)resolved_addr->addr;
   int family = addr->sa_family;
   if (family == AF_INET6) {
     if (grpc_ipv6_loopback_available()) {
-      *newfd = socket(family, type, protocol);
+      *newfd = create_socket(factory, family, type, protocol);
     } else {
       *newfd = -1;
       errno = EAFNOSUPPORT;
@@ -304,7 +318,7 @@
     family = AF_INET;
   }
   *dsmode = family == AF_INET ? GRPC_DSMODE_IPV4 : GRPC_DSMODE_NONE;
-  *newfd = socket(family, type, protocol);
+  *newfd = create_socket(factory, family, type, protocol);
   return error_for_fd(*newfd, resolved_addr);
 }
 
diff --git a/src/core/lib/iomgr/socket_utils_posix.h b/src/core/lib/iomgr/socket_utils_posix.h
index e84d378..2c2fc95 100644
--- a/src/core/lib/iomgr/socket_utils_posix.h
+++ b/src/core/lib/iomgr/socket_utils_posix.h
@@ -41,6 +41,7 @@
 
 #include <grpc/impl/codegen/grpc_types.h>
 #include "src/core/lib/iomgr/error.h"
+#include "src/core/lib/iomgr/socket_factory_posix.h"
 #include "src/core/lib/iomgr/socket_mutator.h"
 
 /* a wrapper for accept or accept4 */
@@ -137,4 +138,10 @@
                                          grpc_dualstack_mode *dsmode,
                                          int *newfd);
 
+/* Same as grpc_create_dualstack_socket(), but use the given socket factory (if
+   non-null) to create the socket, rather than calling socket() directly. */
+grpc_error *grpc_create_dualstack_socket_using_factory(
+    grpc_socket_factory *factory, const grpc_resolved_address *addr, int type,
+    int protocol, grpc_dualstack_mode *dsmode, int *newfd);
+
 #endif /* GRPC_CORE_LIB_IOMGR_SOCKET_UTILS_POSIX_H */
diff --git a/src/core/lib/iomgr/tcp_server_posix.c b/src/core/lib/iomgr/tcp_server_posix.c
index e1efbd4..d6a017c 100644
--- a/src/core/lib/iomgr/tcp_server_posix.c
+++ b/src/core/lib/iomgr/tcp_server_posix.c
@@ -185,10 +185,7 @@
   /* delete ALL the things */
   gpr_mu_lock(&s->mu);
 
-  if (!s->shutdown) {
-    gpr_mu_unlock(&s->mu);
-    return;
-  }
+  GPR_ASSERT(s->shutdown);
 
   if (s->head) {
     grpc_tcp_listener *sp;
@@ -301,7 +298,7 @@
 
 error:
   gpr_mu_lock(&sp->server->mu);
-  if (0 == --sp->server->active_ports) {
+  if (0 == --sp->server->active_ports && sp->server->shutdown) {
     gpr_mu_unlock(&sp->server->mu);
     deactivated_all_ports(exec_ctx, sp->server);
   } else {
diff --git a/src/core/lib/iomgr/tcp_server_utils_posix_common.c b/src/core/lib/iomgr/tcp_server_utils_posix_common.c
index 283b92b..af2b00b 100644
--- a/src/core/lib/iomgr/tcp_server_utils_posix_common.c
+++ b/src/core/lib/iomgr/tcp_server_utils_posix_common.c
@@ -33,7 +33,7 @@
 
 #include "src/core/lib/iomgr/port.h"
 
-#ifdef GRPC_HAVE_IFADDRS
+#ifdef GRPC_POSIX_SOCKET
 
 #include "src/core/lib/iomgr/tcp_server_utils_posix.h"
 
@@ -218,4 +218,4 @@
   return ret;
 }
 
-#endif /* GRPC_HAVE_IFADDRS */
+#endif /* GRPC_POSIX_SOCKET */
diff --git a/src/core/lib/iomgr/timer_uv.c b/src/core/lib/iomgr/timer_uv.c
index f28a144..8e8a075 100644
--- a/src/core/lib/iomgr/timer_uv.c
+++ b/src/core/lib/iomgr/timer_uv.c
@@ -78,6 +78,10 @@
   uv_timer->data = timer;
   timer->uv_timer = uv_timer;
   uv_timer_start(uv_timer, run_expired_timer, timeout, 0);
+  /* We assume that gRPC timers are only used alongside other active gRPC
+     objects, and that there will therefore always be something else keeping
+     the uv loop alive whenever there is a timer */
+  uv_unref((uv_handle_t *)uv_timer);
 }
 
 void grpc_timer_cancel(grpc_exec_ctx *exec_ctx, grpc_timer *timer) {
diff --git a/src/core/lib/iomgr/udp_server.c b/src/core/lib/iomgr/udp_server.c
index 28f2bd9..60579e1 100644
--- a/src/core/lib/iomgr/udp_server.c
+++ b/src/core/lib/iomgr/udp_server.c
@@ -59,11 +59,13 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/time.h>
+#include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/iomgr/error.h"
 #include "src/core/lib/iomgr/ev_posix.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/sockaddr.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/iomgr/socket_factory_posix.h"
 #include "src/core/lib/iomgr/socket_utils_posix.h"
 #include "src/core/lib/iomgr/unix_sockets_posix.h"
 #include "src/core/lib/support/string.h"
@@ -89,6 +91,9 @@
 struct grpc_udp_server {
   gpr_mu mu;
 
+  /* factory to use for creating and binding sockets, or NULL */
+  grpc_socket_factory *socket_factory;
+
   /* active port count: how many ports are actually still listening */
   size_t active_ports;
   /* destroyed port count: how many ports are completely destroyed */
@@ -113,9 +118,24 @@
   void *user_data;
 };
 
-grpc_udp_server *grpc_udp_server_create(void) {
+static grpc_socket_factory *get_socket_factory(const grpc_channel_args *args) {
+  if (args) {
+    const grpc_arg *arg = grpc_channel_args_find(args, GRPC_ARG_SOCKET_FACTORY);
+    if (arg) {
+      GPR_ASSERT(arg->type == GRPC_ARG_POINTER);
+      return arg->value.pointer.p;
+    }
+  }
+  return NULL;
+}
+
+grpc_udp_server *grpc_udp_server_create(const grpc_channel_args *args) {
   grpc_udp_server *s = gpr_malloc(sizeof(grpc_udp_server));
   gpr_mu_init(&s->mu);
+  s->socket_factory = get_socket_factory(args);
+  if (s->socket_factory) {
+    grpc_socket_factory_ref(s->socket_factory);
+  }
   s->active_ports = 0;
   s->destroyed_ports = 0;
   s->shutdown = 0;
@@ -139,6 +159,10 @@
     gpr_free(sp);
   }
 
+  if (s->socket_factory) {
+    grpc_socket_factory_unref(s->socket_factory);
+  }
+
   gpr_free(s);
 }
 
@@ -162,10 +186,7 @@
   /* delete ALL the things */
   gpr_mu_lock(&s->mu);
 
-  if (!s->shutdown) {
-    gpr_mu_unlock(&s->mu);
-    return;
-  }
+  GPR_ASSERT(s->shutdown);
 
   if (s->head) {
     grpc_udp_listener *sp;
@@ -215,8 +236,17 @@
   }
 }
 
+static int bind_socket(grpc_socket_factory *socket_factory, int sockfd,
+                       const grpc_resolved_address *addr) {
+  return (socket_factory != NULL)
+             ? grpc_socket_factory_bind(socket_factory, sockfd, addr)
+             : bind(sockfd, (struct sockaddr *)addr->addr,
+                    (socklen_t)addr->len);
+}
+
 /* Prepare a recently-created socket for listening. */
-static int prepare_socket(int fd, const grpc_resolved_address *addr) {
+static int prepare_socket(grpc_socket_factory *socket_factory, int fd,
+                          const grpc_resolved_address *addr) {
   grpc_resolved_address sockname_temp;
   struct sockaddr *addr_ptr = (struct sockaddr *)addr->addr;
   /* Set send/receive socket buffers to 1 MB */
@@ -246,7 +276,7 @@
   }
 
   GPR_ASSERT(addr->len < ~(socklen_t)0);
-  if (bind(fd, (struct sockaddr *)addr, (socklen_t)addr->len) < 0) {
+  if (bind_socket(socket_factory, fd, addr) < 0) {
     char *addr_str;
     grpc_sockaddr_to_string(&addr_str, addr, 0);
     gpr_log(GPR_ERROR, "bind addr=%s: %s", addr_str, strerror(errno));
@@ -288,7 +318,7 @@
 
   gpr_mu_lock(&sp->server->mu);
   if (error != GRPC_ERROR_NONE) {
-    if (0 == --sp->server->active_ports) {
+    if (0 == --sp->server->active_ports && sp->server->shutdown) {
       gpr_mu_unlock(&sp->server->mu);
       deactivated_all_ports(exec_ctx, sp->server);
     } else {
@@ -311,7 +341,7 @@
 
   gpr_mu_lock(&(sp->server->mu));
   if (error != GRPC_ERROR_NONE) {
-    if (0 == --sp->server->active_ports) {
+    if (0 == --sp->server->active_ports && sp->server->shutdown) {
       gpr_mu_unlock(&sp->server->mu);
       deactivated_all_ports(exec_ctx, sp->server);
     } else {
@@ -339,7 +369,7 @@
   char *addr_str;
   char *name;
 
-  port = prepare_socket(fd, addr);
+  port = prepare_socket(s->socket_factory, fd, addr);
   if (port >= 0) {
     grpc_sockaddr_to_string(&addr_str, addr, 1);
     gpr_asprintf(&name, "udp-server-listener:%s", addr_str);
@@ -417,8 +447,8 @@
     /* Try listening on IPv6 first. */
     addr = &wild6;
     // TODO(rjshade): Test and propagate the returned grpc_error*:
-    GRPC_ERROR_UNREF(grpc_create_dualstack_socket(addr, SOCK_DGRAM, IPPROTO_UDP,
-                                                  &dsmode, &fd));
+    GRPC_ERROR_UNREF(grpc_create_dualstack_socket_using_factory(
+        s->socket_factory, addr, SOCK_DGRAM, IPPROTO_UDP, &dsmode, &fd));
     allocated_port1 =
         add_socket_to_server(s, fd, addr, read_cb, write_cb, orphan_cb);
     if (fd >= 0 && dsmode == GRPC_DSMODE_DUALSTACK) {
@@ -433,8 +463,8 @@
   }
 
   // TODO(rjshade): Test and propagate the returned grpc_error*:
-  GRPC_ERROR_UNREF(grpc_create_dualstack_socket(addr, SOCK_DGRAM, IPPROTO_UDP,
-                                                &dsmode, &fd));
+  GRPC_ERROR_UNREF(grpc_create_dualstack_socket_using_factory(
+      s->socket_factory, addr, SOCK_DGRAM, IPPROTO_UDP, &dsmode, &fd));
   if (fd < 0) {
     gpr_log(GPR_ERROR, "Unable to create socket: %s", strerror(errno));
   }
diff --git a/src/core/lib/iomgr/udp_server.h b/src/core/lib/iomgr/udp_server.h
index 90842a4..9df3fe4 100644
--- a/src/core/lib/iomgr/udp_server.h
+++ b/src/core/lib/iomgr/udp_server.h
@@ -58,7 +58,7 @@
                                           grpc_fd *emfd, void *user_data);
 
 /* Create a server, initially not bound to any ports */
-grpc_udp_server *grpc_udp_server_create(void);
+grpc_udp_server *grpc_udp_server_create(const grpc_channel_args *args);
 
 /* Start listening to bound ports. user_data is passed to callbacks. */
 void grpc_udp_server_start(grpc_exec_ctx *exec_ctx, grpc_udp_server *udp_server,
diff --git a/src/core/lib/security/util/b64.c b/src/core/lib/security/util/b64.c
index 09c8213..0d5a917 100644
--- a/src/core/lib/security/util/b64.c
+++ b/src/core/lib/security/util/b64.c
@@ -71,15 +71,31 @@
 
 char *grpc_base64_encode(const void *vdata, size_t data_size, int url_safe,
                          int multiline) {
-  const unsigned char *data = vdata;
-  const char *base64_chars =
-      url_safe ? base64_url_safe_chars : base64_url_unsafe_chars;
+  size_t result_projected_size =
+      grpc_base64_estimate_encoded_size(data_size, url_safe, multiline);
+  char *result = gpr_malloc(result_projected_size);
+  grpc_base64_encode_core(result, vdata, data_size, url_safe, multiline);
+  return result;
+}
+
+size_t grpc_base64_estimate_encoded_size(size_t data_size, int url_safe,
+                                         int multiline) {
   size_t result_projected_size =
       4 * ((data_size + 3) / 3) +
       2 * (multiline ? (data_size / (3 * GRPC_BASE64_MULTILINE_NUM_BLOCKS))
                      : 0) +
       1;
-  char *result = gpr_malloc(result_projected_size);
+  return result_projected_size;
+}
+
+void grpc_base64_encode_core(char *result, const void *vdata, size_t data_size,
+                             int url_safe, int multiline) {
+  const unsigned char *data = vdata;
+  const char *base64_chars =
+      url_safe ? base64_url_safe_chars : base64_url_unsafe_chars;
+  const size_t result_projected_size =
+      grpc_base64_estimate_encoded_size(data_size, url_safe, multiline);
+
   char *current = result;
   size_t num_blocks = 0;
   size_t i = 0;
@@ -119,7 +135,6 @@
   GPR_ASSERT(current >= result);
   GPR_ASSERT((uintptr_t)(current - result) < result_projected_size);
   result[current - result] = '\0';
-  return result;
 }
 
 grpc_slice grpc_base64_decode(grpc_exec_ctx *exec_ctx, const char *b64,
diff --git a/src/core/lib/security/util/b64.h b/src/core/lib/security/util/b64.h
index d42a136..ef52291 100644
--- a/src/core/lib/security/util/b64.h
+++ b/src/core/lib/security/util/b64.h
@@ -37,10 +37,22 @@
 #include <grpc/slice.h>
 
 /* Encodes data using base64. It is the caller's responsability to free
-   the returned char * using gpr_free. Returns NULL on NULL input. */
+   the returned char * using gpr_free. Returns NULL on NULL input.
+   TODO(makdharma) : change the flags to bool from int */
 char *grpc_base64_encode(const void *data, size_t data_size, int url_safe,
                          int multiline);
 
+/* estimate the upper bound on size of base64 encoded data. The actual size
+ * is guaranteed to be less than or equal to the size returned here. */
+size_t grpc_base64_estimate_encoded_size(size_t data_size, int url_safe,
+                                         int multiline);
+
+/* Encodes data using base64 and write it to memory pointed to by result. It is
+ * the caller's responsiblity to allocate enough memory in |result| to fit the
+ * encoded data. */
+void grpc_base64_encode_core(char *result, const void *vdata, size_t data_size,
+                             int url_safe, int multiline);
+
 /* Decodes data according to the base64 specification. Returns an empty
    slice in case of failure. */
 grpc_slice grpc_base64_decode(grpc_exec_ctx *exec_ctx, const char *b64,
diff --git a/src/core/lib/surface/channel.c b/src/core/lib/surface/channel.c
index d6c7aee..b4bfb92 100644
--- a/src/core/lib/surface/channel.c
+++ b/src/core/lib/surface/channel.c
@@ -194,8 +194,14 @@
 
 size_t grpc_channel_get_call_size_estimate(grpc_channel *channel) {
 #define ROUND_UP_SIZE 256
+  /* We round up our current estimate to the NEXT value of ROUND_UP_SIZE.
+     This ensures:
+      1. a consistent size allocation when our estimate is drifting slowly
+         (which is common) - which tends to help most allocators reuse memory
+      2. a small amount of allowed growth over the estimate without hitting
+         the arena size doubling case, reducing overall memory usage */
   return ((size_t)gpr_atm_no_barrier_load(&channel->call_size_estimate) +
-          ROUND_UP_SIZE) &
+          2 * ROUND_UP_SIZE) &
          ~(size_t)(ROUND_UP_SIZE - 1);
 }
 
diff --git a/src/core/lib/surface/completion_queue_factory.c b/src/core/lib/surface/completion_queue_factory.c
new file mode 100644
index 0000000..db67a51
--- /dev/null
+++ b/src/core/lib/surface/completion_queue_factory.c
@@ -0,0 +1,77 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/surface/completion_queue_factory.h"
+#include "src/core/lib/surface/completion_queue.h"
+
+#include <grpc/support/log.h>
+
+/* TODO (sreek) - Currently this does not use the attributes arg. This will be
+   added in a future PR */
+static grpc_completion_queue* default_create(
+    const grpc_completion_queue_factory* factory,
+    const grpc_completion_queue_attributes* attributes) {
+  return grpc_completion_queue_create(NULL);
+}
+
+static grpc_completion_queue_factory_vtable default_vtable = {default_create};
+
+static const grpc_completion_queue_factory g_default_cq_factory = {
+    "Default Factory", NULL, &default_vtable};
+
+const grpc_completion_queue_factory* grpc_completion_queue_factory_lookup(
+    const grpc_completion_queue_attributes* attributes) {
+  /* As we add more fields to grpc_completion_queue_attributes, we may have to
+     change this assert to:
+         GPR_ASSERT (attributes->version >= 1 &&
+             attributes->version <= GRPC_CQ_CURRENT_VERSION) */
+  GPR_ASSERT(attributes->version == 1);
+
+  /* The default factory can handle version 1 of the attributes structure. We
+     may have to change this as more fields are added to the structure */
+  return &g_default_cq_factory;
+}
+
+grpc_completion_queue* grpc_completion_queue_create_for_next(void* reserved) {
+  GPR_ASSERT(!reserved);
+  grpc_completion_queue_attributes attr = {1, GRPC_CQ_NEXT,
+                                           GRPC_CQ_DEFAULT_POLLING};
+  return g_default_cq_factory.vtable->create(&g_default_cq_factory, &attr);
+}
+
+grpc_completion_queue* grpc_completion_queue_create_for_pluck(void* reserved) {
+  GPR_ASSERT(!reserved);
+  grpc_completion_queue_attributes attr = {1, GRPC_CQ_PLUCK,
+                                           GRPC_CQ_DEFAULT_POLLING};
+  return g_default_cq_factory.vtable->create(&g_default_cq_factory, &attr);
+}
diff --git a/src/core/lib/surface/completion_queue_factory.h b/src/core/lib/surface/completion_queue_factory.h
new file mode 100644
index 0000000..57e90b5
--- /dev/null
+++ b/src/core/lib/surface/completion_queue_factory.h
@@ -0,0 +1,51 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_SURFACE_COMPLETION_QUEUE_FACTORY_H
+#define GRPC_CORE_LIB_SURFACE_COMPLETION_QUEUE_FACTORY_H
+
+#include <grpc/grpc.h>
+#include "src/core/lib/surface/completion_queue.h"
+
+typedef struct grpc_completion_queue_factory_vtable {
+  grpc_completion_queue* (*create)(const grpc_completion_queue_factory*,
+                                   const grpc_completion_queue_attributes*);
+} grpc_completion_queue_factory_vtable;
+
+struct grpc_completion_queue_factory {
+  const char* name;
+  void* data; /* Factory specific data */
+  grpc_completion_queue_factory_vtable* vtable;
+};
+
+#endif /* GRPC_CORE_LIB_SURFACE_COMPLETION_QUEUE_FACTORY_H */
diff --git a/src/core/plugin_registry/grpc_plugin_registry.c b/src/core/plugin_registry/grpc_plugin_registry.c
index 2efd9cd..596e3b7 100644
--- a/src/core/plugin_registry/grpc_plugin_registry.c
+++ b/src/core/plugin_registry/grpc_plugin_registry.c
@@ -43,6 +43,8 @@
 extern void grpc_lb_policy_pick_first_shutdown(void);
 extern void grpc_lb_policy_round_robin_init(void);
 extern void grpc_lb_policy_round_robin_shutdown(void);
+extern void grpc_resolver_dns_ares_init(void);
+extern void grpc_resolver_dns_ares_shutdown(void);
 extern void grpc_resolver_dns_native_init(void);
 extern void grpc_resolver_dns_native_shutdown(void);
 extern void grpc_resolver_sockaddr_init(void);
@@ -63,6 +65,8 @@
                        grpc_lb_policy_pick_first_shutdown);
   grpc_register_plugin(grpc_lb_policy_round_robin_init,
                        grpc_lb_policy_round_robin_shutdown);
+  grpc_register_plugin(grpc_resolver_dns_ares_init,
+                       grpc_resolver_dns_ares_shutdown);
   grpc_register_plugin(grpc_resolver_dns_native_init,
                        grpc_resolver_dns_native_shutdown);
   grpc_register_plugin(grpc_resolver_sockaddr_init,
diff --git a/src/core/plugin_registry/grpc_unsecure_plugin_registry.c b/src/core/plugin_registry/grpc_unsecure_plugin_registry.c
index 8b18af6..a05ebcb 100644
--- a/src/core/plugin_registry/grpc_unsecure_plugin_registry.c
+++ b/src/core/plugin_registry/grpc_unsecure_plugin_registry.c
@@ -37,6 +37,8 @@
 extern void grpc_chttp2_plugin_shutdown(void);
 extern void grpc_client_channel_init(void);
 extern void grpc_client_channel_shutdown(void);
+extern void grpc_resolver_dns_ares_init(void);
+extern void grpc_resolver_dns_ares_shutdown(void);
 extern void grpc_resolver_dns_native_init(void);
 extern void grpc_resolver_dns_native_shutdown(void);
 extern void grpc_resolver_sockaddr_init(void);
@@ -57,6 +59,8 @@
                        grpc_chttp2_plugin_shutdown);
   grpc_register_plugin(grpc_client_channel_init,
                        grpc_client_channel_shutdown);
+  grpc_register_plugin(grpc_resolver_dns_ares_init,
+                       grpc_resolver_dns_ares_shutdown);
   grpc_register_plugin(grpc_resolver_dns_native_init,
                        grpc_resolver_dns_native_shutdown);
   grpc_register_plugin(grpc_resolver_sockaddr_init,
diff --git a/src/cpp/common/channel_arguments.cc b/src/cpp/common/channel_arguments.cc
index eddcacc..53e4a9c 100644
--- a/src/cpp/common/channel_arguments.cc
+++ b/src/cpp/common/channel_arguments.cc
@@ -133,14 +133,19 @@
     return;
   }
   bool replaced = false;
+  auto strings_it = strings_.begin();
   for (auto it = args_.begin(); it != args_.end(); ++it) {
     const grpc_arg& arg = *it;
-    if (arg.type == GRPC_ARG_STRING &&
-        grpc::string(arg.key) == GRPC_ARG_PRIMARY_USER_AGENT_STRING) {
-      strings_.push_back(user_agent_prefix + " " + arg.value.string);
-      it->value.string = const_cast<char*>(strings_.back().c_str());
-      replaced = true;
-      break;
+    ++strings_it;
+    if (arg.type == GRPC_ARG_STRING) {
+      if (grpc::string(arg.key) == GRPC_ARG_PRIMARY_USER_AGENT_STRING) {
+        GPR_ASSERT(arg.value.string == strings_it->c_str());
+        *(strings_it) = user_agent_prefix + " " + arg.value.string;
+        it->value.string = const_cast<char*>(strings_it->c_str());
+        replaced = true;
+        break;
+      }
+      ++strings_it;
     }
   }
   if (!replaced) {
diff --git a/src/csharp/Grpc.Core/ChannelOptions.cs b/src/csharp/Grpc.Core/ChannelOptions.cs
index b6eecea..46a2c66 100644
--- a/src/csharp/Grpc.Core/ChannelOptions.cs
+++ b/src/csharp/Grpc.Core/ChannelOptions.cs
@@ -151,7 +151,14 @@
         public const string MaxConcurrentStreams = "grpc.max_concurrent_streams";
 
         /// <summary>Maximum message length that the channel can receive</summary>
-        public const string MaxMessageLength = "grpc.max_message_length";
+        public const string MaxReceiveMessageLength = "grpc.max_receive_message_length";
+
+        /// <summary>Maximum message length that the channel can send</summary>
+        public const string MaxSendMessageLength = "grpc.max_send_message_length";
+
+        /// <summary>Obsolete, for backward compatibility only.</summary>
+        [Obsolete("Use MaxReceiveMessageLength instead.")]
+        public const string MaxMessageLength = MaxReceiveMessageLength;
 
         /// <summary>Initial sequence number for http2 transports</summary>
         public const string Http2InitialSequenceNumber = "grpc.http2.initial_sequence_number";
diff --git a/src/csharp/Grpc.Examples/MathGrpc.cs b/src/csharp/Grpc.Examples/MathGrpc.cs
index 3364b8c..1f2e67d 100644
--- a/src/csharp/Grpc.Examples/MathGrpc.cs
+++ b/src/csharp/Grpc.Examples/MathGrpc.cs
@@ -35,41 +35,41 @@
 using System;
 using System.Threading;
 using System.Threading.Tasks;
-using Grpc.Core;
+using grpc = global::Grpc.Core;
 
 namespace Math {
   public static partial class Math
   {
     static readonly string __ServiceName = "math.Math";
 
-    static readonly Marshaller<global::Math.DivArgs> __Marshaller_DivArgs = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Math.DivArgs.Parser.ParseFrom);
-    static readonly Marshaller<global::Math.DivReply> __Marshaller_DivReply = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Math.DivReply.Parser.ParseFrom);
-    static readonly Marshaller<global::Math.FibArgs> __Marshaller_FibArgs = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Math.FibArgs.Parser.ParseFrom);
-    static readonly Marshaller<global::Math.Num> __Marshaller_Num = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Math.Num.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Math.DivArgs> __Marshaller_DivArgs = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Math.DivArgs.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Math.DivReply> __Marshaller_DivReply = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Math.DivReply.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Math.FibArgs> __Marshaller_FibArgs = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Math.FibArgs.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Math.Num> __Marshaller_Num = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Math.Num.Parser.ParseFrom);
 
-    static readonly Method<global::Math.DivArgs, global::Math.DivReply> __Method_Div = new Method<global::Math.DivArgs, global::Math.DivReply>(
-        MethodType.Unary,
+    static readonly grpc::Method<global::Math.DivArgs, global::Math.DivReply> __Method_Div = new grpc::Method<global::Math.DivArgs, global::Math.DivReply>(
+        grpc::MethodType.Unary,
         __ServiceName,
         "Div",
         __Marshaller_DivArgs,
         __Marshaller_DivReply);
 
-    static readonly Method<global::Math.DivArgs, global::Math.DivReply> __Method_DivMany = new Method<global::Math.DivArgs, global::Math.DivReply>(
-        MethodType.DuplexStreaming,
+    static readonly grpc::Method<global::Math.DivArgs, global::Math.DivReply> __Method_DivMany = new grpc::Method<global::Math.DivArgs, global::Math.DivReply>(
+        grpc::MethodType.DuplexStreaming,
         __ServiceName,
         "DivMany",
         __Marshaller_DivArgs,
         __Marshaller_DivReply);
 
-    static readonly Method<global::Math.FibArgs, global::Math.Num> __Method_Fib = new Method<global::Math.FibArgs, global::Math.Num>(
-        MethodType.ServerStreaming,
+    static readonly grpc::Method<global::Math.FibArgs, global::Math.Num> __Method_Fib = new grpc::Method<global::Math.FibArgs, global::Math.Num>(
+        grpc::MethodType.ServerStreaming,
         __ServiceName,
         "Fib",
         __Marshaller_FibArgs,
         __Marshaller_Num);
 
-    static readonly Method<global::Math.Num, global::Math.Num> __Method_Sum = new Method<global::Math.Num, global::Math.Num>(
-        MethodType.ClientStreaming,
+    static readonly grpc::Method<global::Math.Num, global::Math.Num> __Method_Sum = new grpc::Method<global::Math.Num, global::Math.Num>(
+        grpc::MethodType.ClientStreaming,
         __ServiceName,
         "Sum",
         __Marshaller_Num,
@@ -91,9 +91,9 @@
       /// <param name="request">The request received from the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>The response to send back to the client (wrapped by a task).</returns>
-      public virtual global::System.Threading.Tasks.Task<global::Math.DivReply> Div(global::Math.DivArgs request, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Math.DivReply> Div(global::Math.DivArgs request, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -106,9 +106,9 @@
       /// <param name="responseStream">Used for sending responses back to the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>A task indicating completion of the handler.</returns>
-      public virtual global::System.Threading.Tasks.Task DivMany(IAsyncStreamReader<global::Math.DivArgs> requestStream, IServerStreamWriter<global::Math.DivReply> responseStream, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task DivMany(grpc::IAsyncStreamReader<global::Math.DivArgs> requestStream, grpc::IServerStreamWriter<global::Math.DivReply> responseStream, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -120,9 +120,9 @@
       /// <param name="responseStream">Used for sending responses back to the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>A task indicating completion of the handler.</returns>
-      public virtual global::System.Threading.Tasks.Task Fib(global::Math.FibArgs request, IServerStreamWriter<global::Math.Num> responseStream, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task Fib(global::Math.FibArgs request, grpc::IServerStreamWriter<global::Math.Num> responseStream, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -132,24 +132,24 @@
       /// <param name="requestStream">Used for reading requests from the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>The response to send back to the client (wrapped by a task).</returns>
-      public virtual global::System.Threading.Tasks.Task<global::Math.Num> Sum(IAsyncStreamReader<global::Math.Num> requestStream, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Math.Num> Sum(grpc::IAsyncStreamReader<global::Math.Num> requestStream, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
     }
 
     /// <summary>Client for Math</summary>
-    public partial class MathClient : ClientBase<MathClient>
+    public partial class MathClient : grpc::ClientBase<MathClient>
     {
       /// <summary>Creates a new client for Math</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
-      public MathClient(Channel channel) : base(channel)
+      public MathClient(grpc::Channel channel) : base(channel)
       {
       }
       /// <summary>Creates a new client for Math that uses a custom <c>CallInvoker</c>.</summary>
       /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
-      public MathClient(CallInvoker callInvoker) : base(callInvoker)
+      public MathClient(grpc::CallInvoker callInvoker) : base(callInvoker)
       {
       }
       /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
@@ -171,9 +171,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Math.DivReply Div(global::Math.DivArgs request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual global::Math.DivReply Div(global::Math.DivArgs request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return Div(request, new CallOptions(headers, deadline, cancellationToken));
+        return Div(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
@@ -182,7 +182,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Math.DivReply Div(global::Math.DivArgs request, CallOptions options)
+      public virtual global::Math.DivReply Div(global::Math.DivArgs request, grpc::CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_Div, null, options, request);
       }
@@ -195,9 +195,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Math.DivReply> DivAsync(global::Math.DivArgs request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncUnaryCall<global::Math.DivReply> DivAsync(global::Math.DivArgs request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return DivAsync(request, new CallOptions(headers, deadline, cancellationToken));
+        return DivAsync(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
@@ -206,7 +206,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Math.DivReply> DivAsync(global::Math.DivArgs request, CallOptions options)
+      public virtual grpc::AsyncUnaryCall<global::Math.DivReply> DivAsync(global::Math.DivArgs request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_Div, null, options, request);
       }
@@ -220,9 +220,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncDuplexStreamingCall<global::Math.DivArgs, global::Math.DivReply> DivMany(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncDuplexStreamingCall<global::Math.DivArgs, global::Math.DivReply> DivMany(grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return DivMany(new CallOptions(headers, deadline, cancellationToken));
+        return DivMany(new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// DivMany accepts an arbitrary number of division args from the client stream
@@ -232,7 +232,7 @@
       /// </summary>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncDuplexStreamingCall<global::Math.DivArgs, global::Math.DivReply> DivMany(CallOptions options)
+      public virtual grpc::AsyncDuplexStreamingCall<global::Math.DivArgs, global::Math.DivReply> DivMany(grpc::CallOptions options)
       {
         return CallInvoker.AsyncDuplexStreamingCall(__Method_DivMany, null, options);
       }
@@ -246,9 +246,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncServerStreamingCall<global::Math.Num> Fib(global::Math.FibArgs request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncServerStreamingCall<global::Math.Num> Fib(global::Math.FibArgs request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return Fib(request, new CallOptions(headers, deadline, cancellationToken));
+        return Fib(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// Fib generates numbers in the Fibonacci sequence.  If FibArgs.limit > 0, Fib
@@ -258,7 +258,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncServerStreamingCall<global::Math.Num> Fib(global::Math.FibArgs request, CallOptions options)
+      public virtual grpc::AsyncServerStreamingCall<global::Math.Num> Fib(global::Math.FibArgs request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncServerStreamingCall(__Method_Fib, null, options, request);
       }
@@ -270,9 +270,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncClientStreamingCall<global::Math.Num, global::Math.Num> Sum(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncClientStreamingCall<global::Math.Num, global::Math.Num> Sum(grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return Sum(new CallOptions(headers, deadline, cancellationToken));
+        return Sum(new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// Sum sums a stream of numbers, returning the final result once the stream
@@ -280,7 +280,7 @@
       /// </summary>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncClientStreamingCall<global::Math.Num, global::Math.Num> Sum(CallOptions options)
+      public virtual grpc::AsyncClientStreamingCall<global::Math.Num, global::Math.Num> Sum(grpc::CallOptions options)
       {
         return CallInvoker.AsyncClientStreamingCall(__Method_Sum, null, options);
       }
@@ -293,9 +293,9 @@
 
     /// <summary>Creates service definition that can be registered with a server</summary>
     /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
-    public static ServerServiceDefinition BindService(MathBase serviceImpl)
+    public static grpc::ServerServiceDefinition BindService(MathBase serviceImpl)
     {
-      return ServerServiceDefinition.CreateBuilder()
+      return grpc::ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_Div, serviceImpl.Div)
           .AddMethod(__Method_DivMany, serviceImpl.DivMany)
           .AddMethod(__Method_Fib, serviceImpl.Fib)
diff --git a/src/csharp/Grpc.HealthCheck/HealthGrpc.cs b/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
index 020c2df..d3115f3 100644
--- a/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
+++ b/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
@@ -35,18 +35,18 @@
 using System;
 using System.Threading;
 using System.Threading.Tasks;
-using Grpc.Core;
+using grpc = global::Grpc.Core;
 
 namespace Grpc.Health.V1 {
   public static partial class Health
   {
     static readonly string __ServiceName = "grpc.health.v1.Health";
 
-    static readonly Marshaller<global::Grpc.Health.V1.HealthCheckRequest> __Marshaller_HealthCheckRequest = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Health.V1.HealthCheckRequest.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Health.V1.HealthCheckResponse> __Marshaller_HealthCheckResponse = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Health.V1.HealthCheckResponse.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Health.V1.HealthCheckRequest> __Marshaller_HealthCheckRequest = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Health.V1.HealthCheckRequest.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Health.V1.HealthCheckResponse> __Marshaller_HealthCheckResponse = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Health.V1.HealthCheckResponse.Parser.ParseFrom);
 
-    static readonly Method<global::Grpc.Health.V1.HealthCheckRequest, global::Grpc.Health.V1.HealthCheckResponse> __Method_Check = new Method<global::Grpc.Health.V1.HealthCheckRequest, global::Grpc.Health.V1.HealthCheckResponse>(
-        MethodType.Unary,
+    static readonly grpc::Method<global::Grpc.Health.V1.HealthCheckRequest, global::Grpc.Health.V1.HealthCheckResponse> __Method_Check = new grpc::Method<global::Grpc.Health.V1.HealthCheckRequest, global::Grpc.Health.V1.HealthCheckResponse>(
+        grpc::MethodType.Unary,
         __ServiceName,
         "Check",
         __Marshaller_HealthCheckRequest,
@@ -61,24 +61,24 @@
     /// <summary>Base class for server-side implementations of Health</summary>
     public abstract partial class HealthBase
     {
-      public virtual global::System.Threading.Tasks.Task<global::Grpc.Health.V1.HealthCheckResponse> Check(global::Grpc.Health.V1.HealthCheckRequest request, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Grpc.Health.V1.HealthCheckResponse> Check(global::Grpc.Health.V1.HealthCheckRequest request, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
     }
 
     /// <summary>Client for Health</summary>
-    public partial class HealthClient : ClientBase<HealthClient>
+    public partial class HealthClient : grpc::ClientBase<HealthClient>
     {
       /// <summary>Creates a new client for Health</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
-      public HealthClient(Channel channel) : base(channel)
+      public HealthClient(grpc::Channel channel) : base(channel)
       {
       }
       /// <summary>Creates a new client for Health that uses a custom <c>CallInvoker</c>.</summary>
       /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
-      public HealthClient(CallInvoker callInvoker) : base(callInvoker)
+      public HealthClient(grpc::CallInvoker callInvoker) : base(callInvoker)
       {
       }
       /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
@@ -91,19 +91,19 @@
       {
       }
 
-      public virtual global::Grpc.Health.V1.HealthCheckResponse Check(global::Grpc.Health.V1.HealthCheckRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual global::Grpc.Health.V1.HealthCheckResponse Check(global::Grpc.Health.V1.HealthCheckRequest request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return Check(request, new CallOptions(headers, deadline, cancellationToken));
+        return Check(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
-      public virtual global::Grpc.Health.V1.HealthCheckResponse Check(global::Grpc.Health.V1.HealthCheckRequest request, CallOptions options)
+      public virtual global::Grpc.Health.V1.HealthCheckResponse Check(global::Grpc.Health.V1.HealthCheckRequest request, grpc::CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_Check, null, options, request);
       }
-      public virtual AsyncUnaryCall<global::Grpc.Health.V1.HealthCheckResponse> CheckAsync(global::Grpc.Health.V1.HealthCheckRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Health.V1.HealthCheckResponse> CheckAsync(global::Grpc.Health.V1.HealthCheckRequest request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return CheckAsync(request, new CallOptions(headers, deadline, cancellationToken));
+        return CheckAsync(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
-      public virtual AsyncUnaryCall<global::Grpc.Health.V1.HealthCheckResponse> CheckAsync(global::Grpc.Health.V1.HealthCheckRequest request, CallOptions options)
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Health.V1.HealthCheckResponse> CheckAsync(global::Grpc.Health.V1.HealthCheckRequest request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_Check, null, options, request);
       }
@@ -116,9 +116,9 @@
 
     /// <summary>Creates service definition that can be registered with a server</summary>
     /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
-    public static ServerServiceDefinition BindService(HealthBase serviceImpl)
+    public static grpc::ServerServiceDefinition BindService(HealthBase serviceImpl)
     {
-      return ServerServiceDefinition.CreateBuilder()
+      return grpc::ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_Check, serviceImpl.Check).Build();
     }
 
diff --git a/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs b/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
index 8b58622..c80ffa8 100644
--- a/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
@@ -41,26 +41,26 @@
 using System;
 using System.Threading;
 using System.Threading.Tasks;
-using Grpc.Core;
+using grpc = global::Grpc.Core;
 
 namespace Grpc.Testing {
   public static partial class MetricsService
   {
     static readonly string __ServiceName = "grpc.testing.MetricsService";
 
-    static readonly Marshaller<global::Grpc.Testing.EmptyMessage> __Marshaller_EmptyMessage = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.EmptyMessage.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.GaugeResponse> __Marshaller_GaugeResponse = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.GaugeResponse.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.GaugeRequest> __Marshaller_GaugeRequest = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.GaugeRequest.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.EmptyMessage> __Marshaller_EmptyMessage = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.EmptyMessage.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.GaugeResponse> __Marshaller_GaugeResponse = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.GaugeResponse.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.GaugeRequest> __Marshaller_GaugeRequest = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.GaugeRequest.Parser.ParseFrom);
 
-    static readonly Method<global::Grpc.Testing.EmptyMessage, global::Grpc.Testing.GaugeResponse> __Method_GetAllGauges = new Method<global::Grpc.Testing.EmptyMessage, global::Grpc.Testing.GaugeResponse>(
-        MethodType.ServerStreaming,
+    static readonly grpc::Method<global::Grpc.Testing.EmptyMessage, global::Grpc.Testing.GaugeResponse> __Method_GetAllGauges = new grpc::Method<global::Grpc.Testing.EmptyMessage, global::Grpc.Testing.GaugeResponse>(
+        grpc::MethodType.ServerStreaming,
         __ServiceName,
         "GetAllGauges",
         __Marshaller_EmptyMessage,
         __Marshaller_GaugeResponse);
 
-    static readonly Method<global::Grpc.Testing.GaugeRequest, global::Grpc.Testing.GaugeResponse> __Method_GetGauge = new Method<global::Grpc.Testing.GaugeRequest, global::Grpc.Testing.GaugeResponse>(
-        MethodType.Unary,
+    static readonly grpc::Method<global::Grpc.Testing.GaugeRequest, global::Grpc.Testing.GaugeResponse> __Method_GetGauge = new grpc::Method<global::Grpc.Testing.GaugeRequest, global::Grpc.Testing.GaugeResponse>(
+        grpc::MethodType.Unary,
         __ServiceName,
         "GetGauge",
         __Marshaller_GaugeRequest,
@@ -83,9 +83,9 @@
       /// <param name="responseStream">Used for sending responses back to the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>A task indicating completion of the handler.</returns>
-      public virtual global::System.Threading.Tasks.Task GetAllGauges(global::Grpc.Testing.EmptyMessage request, IServerStreamWriter<global::Grpc.Testing.GaugeResponse> responseStream, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task GetAllGauges(global::Grpc.Testing.EmptyMessage request, grpc::IServerStreamWriter<global::Grpc.Testing.GaugeResponse> responseStream, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -94,24 +94,24 @@
       /// <param name="request">The request received from the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>The response to send back to the client (wrapped by a task).</returns>
-      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.GaugeResponse> GetGauge(global::Grpc.Testing.GaugeRequest request, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.GaugeResponse> GetGauge(global::Grpc.Testing.GaugeRequest request, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
     }
 
     /// <summary>Client for MetricsService</summary>
-    public partial class MetricsServiceClient : ClientBase<MetricsServiceClient>
+    public partial class MetricsServiceClient : grpc::ClientBase<MetricsServiceClient>
     {
       /// <summary>Creates a new client for MetricsService</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
-      public MetricsServiceClient(Channel channel) : base(channel)
+      public MetricsServiceClient(grpc::Channel channel) : base(channel)
       {
       }
       /// <summary>Creates a new client for MetricsService that uses a custom <c>CallInvoker</c>.</summary>
       /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
-      public MetricsServiceClient(CallInvoker callInvoker) : base(callInvoker)
+      public MetricsServiceClient(grpc::CallInvoker callInvoker) : base(callInvoker)
       {
       }
       /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
@@ -133,9 +133,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncServerStreamingCall<global::Grpc.Testing.GaugeResponse> GetAllGauges(global::Grpc.Testing.EmptyMessage request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncServerStreamingCall<global::Grpc.Testing.GaugeResponse> GetAllGauges(global::Grpc.Testing.EmptyMessage request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return GetAllGauges(request, new CallOptions(headers, deadline, cancellationToken));
+        return GetAllGauges(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// Returns the values of all the gauges that are currently being maintained by
@@ -144,7 +144,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncServerStreamingCall<global::Grpc.Testing.GaugeResponse> GetAllGauges(global::Grpc.Testing.EmptyMessage request, CallOptions options)
+      public virtual grpc::AsyncServerStreamingCall<global::Grpc.Testing.GaugeResponse> GetAllGauges(global::Grpc.Testing.EmptyMessage request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncServerStreamingCall(__Method_GetAllGauges, null, options, request);
       }
@@ -156,9 +156,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.GaugeResponse GetGauge(global::Grpc.Testing.GaugeRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual global::Grpc.Testing.GaugeResponse GetGauge(global::Grpc.Testing.GaugeRequest request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return GetGauge(request, new CallOptions(headers, deadline, cancellationToken));
+        return GetGauge(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// Returns the value of one gauge
@@ -166,7 +166,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.GaugeResponse GetGauge(global::Grpc.Testing.GaugeRequest request, CallOptions options)
+      public virtual global::Grpc.Testing.GaugeResponse GetGauge(global::Grpc.Testing.GaugeRequest request, grpc::CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_GetGauge, null, options, request);
       }
@@ -178,9 +178,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.GaugeResponse> GetGaugeAsync(global::Grpc.Testing.GaugeRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.GaugeResponse> GetGaugeAsync(global::Grpc.Testing.GaugeRequest request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return GetGaugeAsync(request, new CallOptions(headers, deadline, cancellationToken));
+        return GetGaugeAsync(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// Returns the value of one gauge
@@ -188,7 +188,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.GaugeResponse> GetGaugeAsync(global::Grpc.Testing.GaugeRequest request, CallOptions options)
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.GaugeResponse> GetGaugeAsync(global::Grpc.Testing.GaugeRequest request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_GetGauge, null, options, request);
       }
@@ -201,9 +201,9 @@
 
     /// <summary>Creates service definition that can be registered with a server</summary>
     /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
-    public static ServerServiceDefinition BindService(MetricsServiceBase serviceImpl)
+    public static grpc::ServerServiceDefinition BindService(MetricsServiceBase serviceImpl)
     {
-      return ServerServiceDefinition.CreateBuilder()
+      return grpc::ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_GetAllGauges, serviceImpl.GetAllGauges)
           .AddMethod(__Method_GetGauge, serviceImpl.GetGauge).Build();
     }
diff --git a/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs b/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
index 5135d9a..bb95c8a 100644
--- a/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
@@ -37,25 +37,25 @@
 using System;
 using System.Threading;
 using System.Threading.Tasks;
-using Grpc.Core;
+using grpc = global::Grpc.Core;
 
 namespace Grpc.Testing {
   public static partial class BenchmarkService
   {
     static readonly string __ServiceName = "grpc.testing.BenchmarkService";
 
-    static readonly Marshaller<global::Grpc.Testing.SimpleRequest> __Marshaller_SimpleRequest = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.SimpleRequest.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.SimpleResponse> __Marshaller_SimpleResponse = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.SimpleResponse.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.SimpleRequest> __Marshaller_SimpleRequest = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.SimpleRequest.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.SimpleResponse> __Marshaller_SimpleResponse = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.SimpleResponse.Parser.ParseFrom);
 
-    static readonly Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> __Method_UnaryCall = new Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse>(
-        MethodType.Unary,
+    static readonly grpc::Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> __Method_UnaryCall = new grpc::Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse>(
+        grpc::MethodType.Unary,
         __ServiceName,
         "UnaryCall",
         __Marshaller_SimpleRequest,
         __Marshaller_SimpleResponse);
 
-    static readonly Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> __Method_StreamingCall = new Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse>(
-        MethodType.DuplexStreaming,
+    static readonly grpc::Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> __Method_StreamingCall = new grpc::Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse>(
+        grpc::MethodType.DuplexStreaming,
         __ServiceName,
         "StreamingCall",
         __Marshaller_SimpleRequest,
@@ -77,9 +77,9 @@
       /// <param name="request">The request received from the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>The response to send back to the client (wrapped by a task).</returns>
-      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.SimpleResponse> UnaryCall(global::Grpc.Testing.SimpleRequest request, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.SimpleResponse> UnaryCall(global::Grpc.Testing.SimpleRequest request, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -90,24 +90,24 @@
       /// <param name="responseStream">Used for sending responses back to the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>A task indicating completion of the handler.</returns>
-      public virtual global::System.Threading.Tasks.Task StreamingCall(IAsyncStreamReader<global::Grpc.Testing.SimpleRequest> requestStream, IServerStreamWriter<global::Grpc.Testing.SimpleResponse> responseStream, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task StreamingCall(grpc::IAsyncStreamReader<global::Grpc.Testing.SimpleRequest> requestStream, grpc::IServerStreamWriter<global::Grpc.Testing.SimpleResponse> responseStream, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
     }
 
     /// <summary>Client for BenchmarkService</summary>
-    public partial class BenchmarkServiceClient : ClientBase<BenchmarkServiceClient>
+    public partial class BenchmarkServiceClient : grpc::ClientBase<BenchmarkServiceClient>
     {
       /// <summary>Creates a new client for BenchmarkService</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
-      public BenchmarkServiceClient(Channel channel) : base(channel)
+      public BenchmarkServiceClient(grpc::Channel channel) : base(channel)
       {
       }
       /// <summary>Creates a new client for BenchmarkService that uses a custom <c>CallInvoker</c>.</summary>
       /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
-      public BenchmarkServiceClient(CallInvoker callInvoker) : base(callInvoker)
+      public BenchmarkServiceClient(grpc::CallInvoker callInvoker) : base(callInvoker)
       {
       }
       /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
@@ -129,9 +129,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return UnaryCall(request, new CallOptions(headers, deadline, cancellationToken));
+        return UnaryCall(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// One request followed by one response.
@@ -140,7 +140,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, CallOptions options)
+      public virtual global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, grpc::CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_UnaryCall, null, options, request);
       }
@@ -153,9 +153,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return UnaryCallAsync(request, new CallOptions(headers, deadline, cancellationToken));
+        return UnaryCallAsync(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// One request followed by one response.
@@ -164,7 +164,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, CallOptions options)
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_UnaryCall, null, options, request);
       }
@@ -176,9 +176,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> StreamingCall(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncDuplexStreamingCall<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> StreamingCall(grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return StreamingCall(new CallOptions(headers, deadline, cancellationToken));
+        return StreamingCall(new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// One request followed by one response.
@@ -186,7 +186,7 @@
       /// </summary>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> StreamingCall(CallOptions options)
+      public virtual grpc::AsyncDuplexStreamingCall<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> StreamingCall(grpc::CallOptions options)
       {
         return CallInvoker.AsyncDuplexStreamingCall(__Method_StreamingCall, null, options);
       }
@@ -199,9 +199,9 @@
 
     /// <summary>Creates service definition that can be registered with a server</summary>
     /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
-    public static ServerServiceDefinition BindService(BenchmarkServiceBase serviceImpl)
+    public static grpc::ServerServiceDefinition BindService(BenchmarkServiceBase serviceImpl)
     {
-      return ServerServiceDefinition.CreateBuilder()
+      return grpc::ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_UnaryCall, serviceImpl.UnaryCall)
           .AddMethod(__Method_StreamingCall, serviceImpl.StreamingCall).Build();
     }
@@ -211,37 +211,37 @@
   {
     static readonly string __ServiceName = "grpc.testing.WorkerService";
 
-    static readonly Marshaller<global::Grpc.Testing.ServerArgs> __Marshaller_ServerArgs = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ServerArgs.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.ServerStatus> __Marshaller_ServerStatus = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ServerStatus.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.ClientArgs> __Marshaller_ClientArgs = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ClientArgs.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.ClientStatus> __Marshaller_ClientStatus = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ClientStatus.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.CoreRequest> __Marshaller_CoreRequest = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.CoreRequest.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.CoreResponse> __Marshaller_CoreResponse = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.CoreResponse.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.Void> __Marshaller_Void = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.Void.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.ServerArgs> __Marshaller_ServerArgs = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ServerArgs.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.ServerStatus> __Marshaller_ServerStatus = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ServerStatus.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.ClientArgs> __Marshaller_ClientArgs = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ClientArgs.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.ClientStatus> __Marshaller_ClientStatus = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ClientStatus.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.CoreRequest> __Marshaller_CoreRequest = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.CoreRequest.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.CoreResponse> __Marshaller_CoreResponse = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.CoreResponse.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.Void> __Marshaller_Void = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.Void.Parser.ParseFrom);
 
-    static readonly Method<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus> __Method_RunServer = new Method<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus>(
-        MethodType.DuplexStreaming,
+    static readonly grpc::Method<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus> __Method_RunServer = new grpc::Method<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus>(
+        grpc::MethodType.DuplexStreaming,
         __ServiceName,
         "RunServer",
         __Marshaller_ServerArgs,
         __Marshaller_ServerStatus);
 
-    static readonly Method<global::Grpc.Testing.ClientArgs, global::Grpc.Testing.ClientStatus> __Method_RunClient = new Method<global::Grpc.Testing.ClientArgs, global::Grpc.Testing.ClientStatus>(
-        MethodType.DuplexStreaming,
+    static readonly grpc::Method<global::Grpc.Testing.ClientArgs, global::Grpc.Testing.ClientStatus> __Method_RunClient = new grpc::Method<global::Grpc.Testing.ClientArgs, global::Grpc.Testing.ClientStatus>(
+        grpc::MethodType.DuplexStreaming,
         __ServiceName,
         "RunClient",
         __Marshaller_ClientArgs,
         __Marshaller_ClientStatus);
 
-    static readonly Method<global::Grpc.Testing.CoreRequest, global::Grpc.Testing.CoreResponse> __Method_CoreCount = new Method<global::Grpc.Testing.CoreRequest, global::Grpc.Testing.CoreResponse>(
-        MethodType.Unary,
+    static readonly grpc::Method<global::Grpc.Testing.CoreRequest, global::Grpc.Testing.CoreResponse> __Method_CoreCount = new grpc::Method<global::Grpc.Testing.CoreRequest, global::Grpc.Testing.CoreResponse>(
+        grpc::MethodType.Unary,
         __ServiceName,
         "CoreCount",
         __Marshaller_CoreRequest,
         __Marshaller_CoreResponse);
 
-    static readonly Method<global::Grpc.Testing.Void, global::Grpc.Testing.Void> __Method_QuitWorker = new Method<global::Grpc.Testing.Void, global::Grpc.Testing.Void>(
-        MethodType.Unary,
+    static readonly grpc::Method<global::Grpc.Testing.Void, global::Grpc.Testing.Void> __Method_QuitWorker = new grpc::Method<global::Grpc.Testing.Void, global::Grpc.Testing.Void>(
+        grpc::MethodType.Unary,
         __ServiceName,
         "QuitWorker",
         __Marshaller_Void,
@@ -268,9 +268,9 @@
       /// <param name="responseStream">Used for sending responses back to the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>A task indicating completion of the handler.</returns>
-      public virtual global::System.Threading.Tasks.Task RunServer(IAsyncStreamReader<global::Grpc.Testing.ServerArgs> requestStream, IServerStreamWriter<global::Grpc.Testing.ServerStatus> responseStream, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task RunServer(grpc::IAsyncStreamReader<global::Grpc.Testing.ServerArgs> requestStream, grpc::IServerStreamWriter<global::Grpc.Testing.ServerStatus> responseStream, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -285,9 +285,9 @@
       /// <param name="responseStream">Used for sending responses back to the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>A task indicating completion of the handler.</returns>
-      public virtual global::System.Threading.Tasks.Task RunClient(IAsyncStreamReader<global::Grpc.Testing.ClientArgs> requestStream, IServerStreamWriter<global::Grpc.Testing.ClientStatus> responseStream, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task RunClient(grpc::IAsyncStreamReader<global::Grpc.Testing.ClientArgs> requestStream, grpc::IServerStreamWriter<global::Grpc.Testing.ClientStatus> responseStream, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -296,9 +296,9 @@
       /// <param name="request">The request received from the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>The response to send back to the client (wrapped by a task).</returns>
-      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.CoreResponse> CoreCount(global::Grpc.Testing.CoreRequest request, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.CoreResponse> CoreCount(global::Grpc.Testing.CoreRequest request, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -307,24 +307,24 @@
       /// <param name="request">The request received from the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>The response to send back to the client (wrapped by a task).</returns>
-      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Void> QuitWorker(global::Grpc.Testing.Void request, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Void> QuitWorker(global::Grpc.Testing.Void request, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
     }
 
     /// <summary>Client for WorkerService</summary>
-    public partial class WorkerServiceClient : ClientBase<WorkerServiceClient>
+    public partial class WorkerServiceClient : grpc::ClientBase<WorkerServiceClient>
     {
       /// <summary>Creates a new client for WorkerService</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
-      public WorkerServiceClient(Channel channel) : base(channel)
+      public WorkerServiceClient(grpc::Channel channel) : base(channel)
       {
       }
       /// <summary>Creates a new client for WorkerService that uses a custom <c>CallInvoker</c>.</summary>
       /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
-      public WorkerServiceClient(CallInvoker callInvoker) : base(callInvoker)
+      public WorkerServiceClient(grpc::CallInvoker callInvoker) : base(callInvoker)
       {
       }
       /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
@@ -349,9 +349,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus> RunServer(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncDuplexStreamingCall<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus> RunServer(grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return RunServer(new CallOptions(headers, deadline, cancellationToken));
+        return RunServer(new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// Start server with specified workload.
@@ -363,7 +363,7 @@
       /// </summary>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus> RunServer(CallOptions options)
+      public virtual grpc::AsyncDuplexStreamingCall<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus> RunServer(grpc::CallOptions options)
       {
         return CallInvoker.AsyncDuplexStreamingCall(__Method_RunServer, null, options);
       }
@@ -379,9 +379,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.ClientArgs, global::Grpc.Testing.ClientStatus> RunClient(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncDuplexStreamingCall<global::Grpc.Testing.ClientArgs, global::Grpc.Testing.ClientStatus> RunClient(grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return RunClient(new CallOptions(headers, deadline, cancellationToken));
+        return RunClient(new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// Start client with specified workload.
@@ -393,7 +393,7 @@
       /// </summary>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.ClientArgs, global::Grpc.Testing.ClientStatus> RunClient(CallOptions options)
+      public virtual grpc::AsyncDuplexStreamingCall<global::Grpc.Testing.ClientArgs, global::Grpc.Testing.ClientStatus> RunClient(grpc::CallOptions options)
       {
         return CallInvoker.AsyncDuplexStreamingCall(__Method_RunClient, null, options);
       }
@@ -405,9 +405,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.CoreResponse CoreCount(global::Grpc.Testing.CoreRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual global::Grpc.Testing.CoreResponse CoreCount(global::Grpc.Testing.CoreRequest request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return CoreCount(request, new CallOptions(headers, deadline, cancellationToken));
+        return CoreCount(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// Just return the core count - unary call
@@ -415,7 +415,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.CoreResponse CoreCount(global::Grpc.Testing.CoreRequest request, CallOptions options)
+      public virtual global::Grpc.Testing.CoreResponse CoreCount(global::Grpc.Testing.CoreRequest request, grpc::CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_CoreCount, null, options, request);
       }
@@ -427,9 +427,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.CoreResponse> CoreCountAsync(global::Grpc.Testing.CoreRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.CoreResponse> CoreCountAsync(global::Grpc.Testing.CoreRequest request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return CoreCountAsync(request, new CallOptions(headers, deadline, cancellationToken));
+        return CoreCountAsync(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// Just return the core count - unary call
@@ -437,7 +437,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.CoreResponse> CoreCountAsync(global::Grpc.Testing.CoreRequest request, CallOptions options)
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.CoreResponse> CoreCountAsync(global::Grpc.Testing.CoreRequest request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_CoreCount, null, options, request);
       }
@@ -449,9 +449,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.Void QuitWorker(global::Grpc.Testing.Void request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual global::Grpc.Testing.Void QuitWorker(global::Grpc.Testing.Void request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return QuitWorker(request, new CallOptions(headers, deadline, cancellationToken));
+        return QuitWorker(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// Quit this worker
@@ -459,7 +459,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.Void QuitWorker(global::Grpc.Testing.Void request, CallOptions options)
+      public virtual global::Grpc.Testing.Void QuitWorker(global::Grpc.Testing.Void request, grpc::CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_QuitWorker, null, options, request);
       }
@@ -471,9 +471,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.Void> QuitWorkerAsync(global::Grpc.Testing.Void request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.Void> QuitWorkerAsync(global::Grpc.Testing.Void request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return QuitWorkerAsync(request, new CallOptions(headers, deadline, cancellationToken));
+        return QuitWorkerAsync(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// Quit this worker
@@ -481,7 +481,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.Void> QuitWorkerAsync(global::Grpc.Testing.Void request, CallOptions options)
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.Void> QuitWorkerAsync(global::Grpc.Testing.Void request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_QuitWorker, null, options, request);
       }
@@ -494,9 +494,9 @@
 
     /// <summary>Creates service definition that can be registered with a server</summary>
     /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
-    public static ServerServiceDefinition BindService(WorkerServiceBase serviceImpl)
+    public static grpc::ServerServiceDefinition BindService(WorkerServiceBase serviceImpl)
     {
-      return ServerServiceDefinition.CreateBuilder()
+      return grpc::ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_RunServer, serviceImpl.RunServer)
           .AddMethod(__Method_RunClient, serviceImpl.RunClient)
           .AddMethod(__Method_CoreCount, serviceImpl.CoreCount)
diff --git a/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs b/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
index 0265f8e..77f76eb 100644
--- a/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
@@ -38,7 +38,7 @@
 using System;
 using System.Threading;
 using System.Threading.Tasks;
-using Grpc.Core;
+using grpc = global::Grpc.Core;
 
 namespace Grpc.Testing {
   /// <summary>
@@ -49,65 +49,65 @@
   {
     static readonly string __ServiceName = "grpc.testing.TestService";
 
-    static readonly Marshaller<global::Grpc.Testing.Empty> __Marshaller_Empty = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.Empty.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.SimpleRequest> __Marshaller_SimpleRequest = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.SimpleRequest.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.SimpleResponse> __Marshaller_SimpleResponse = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.SimpleResponse.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.StreamingOutputCallRequest> __Marshaller_StreamingOutputCallRequest = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.StreamingOutputCallRequest.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.StreamingOutputCallResponse> __Marshaller_StreamingOutputCallResponse = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.StreamingOutputCallResponse.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.StreamingInputCallRequest> __Marshaller_StreamingInputCallRequest = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.StreamingInputCallRequest.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.StreamingInputCallResponse> __Marshaller_StreamingInputCallResponse = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.StreamingInputCallResponse.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.Empty> __Marshaller_Empty = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.Empty.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.SimpleRequest> __Marshaller_SimpleRequest = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.SimpleRequest.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.SimpleResponse> __Marshaller_SimpleResponse = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.SimpleResponse.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.StreamingOutputCallRequest> __Marshaller_StreamingOutputCallRequest = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.StreamingOutputCallRequest.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.StreamingOutputCallResponse> __Marshaller_StreamingOutputCallResponse = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.StreamingOutputCallResponse.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.StreamingInputCallRequest> __Marshaller_StreamingInputCallRequest = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.StreamingInputCallRequest.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.StreamingInputCallResponse> __Marshaller_StreamingInputCallResponse = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.StreamingInputCallResponse.Parser.ParseFrom);
 
-    static readonly Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty> __Method_EmptyCall = new Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty>(
-        MethodType.Unary,
+    static readonly grpc::Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty> __Method_EmptyCall = new grpc::Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty>(
+        grpc::MethodType.Unary,
         __ServiceName,
         "EmptyCall",
         __Marshaller_Empty,
         __Marshaller_Empty);
 
-    static readonly Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> __Method_UnaryCall = new Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse>(
-        MethodType.Unary,
+    static readonly grpc::Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> __Method_UnaryCall = new grpc::Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse>(
+        grpc::MethodType.Unary,
         __ServiceName,
         "UnaryCall",
         __Marshaller_SimpleRequest,
         __Marshaller_SimpleResponse);
 
-    static readonly Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> __Method_CacheableUnaryCall = new Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse>(
-        MethodType.Unary,
+    static readonly grpc::Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> __Method_CacheableUnaryCall = new grpc::Method<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse>(
+        grpc::MethodType.Unary,
         __ServiceName,
         "CacheableUnaryCall",
         __Marshaller_SimpleRequest,
         __Marshaller_SimpleResponse);
 
-    static readonly Method<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> __Method_StreamingOutputCall = new Method<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse>(
-        MethodType.ServerStreaming,
+    static readonly grpc::Method<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> __Method_StreamingOutputCall = new grpc::Method<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse>(
+        grpc::MethodType.ServerStreaming,
         __ServiceName,
         "StreamingOutputCall",
         __Marshaller_StreamingOutputCallRequest,
         __Marshaller_StreamingOutputCallResponse);
 
-    static readonly Method<global::Grpc.Testing.StreamingInputCallRequest, global::Grpc.Testing.StreamingInputCallResponse> __Method_StreamingInputCall = new Method<global::Grpc.Testing.StreamingInputCallRequest, global::Grpc.Testing.StreamingInputCallResponse>(
-        MethodType.ClientStreaming,
+    static readonly grpc::Method<global::Grpc.Testing.StreamingInputCallRequest, global::Grpc.Testing.StreamingInputCallResponse> __Method_StreamingInputCall = new grpc::Method<global::Grpc.Testing.StreamingInputCallRequest, global::Grpc.Testing.StreamingInputCallResponse>(
+        grpc::MethodType.ClientStreaming,
         __ServiceName,
         "StreamingInputCall",
         __Marshaller_StreamingInputCallRequest,
         __Marshaller_StreamingInputCallResponse);
 
-    static readonly Method<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> __Method_FullDuplexCall = new Method<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse>(
-        MethodType.DuplexStreaming,
+    static readonly grpc::Method<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> __Method_FullDuplexCall = new grpc::Method<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse>(
+        grpc::MethodType.DuplexStreaming,
         __ServiceName,
         "FullDuplexCall",
         __Marshaller_StreamingOutputCallRequest,
         __Marshaller_StreamingOutputCallResponse);
 
-    static readonly Method<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> __Method_HalfDuplexCall = new Method<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse>(
-        MethodType.DuplexStreaming,
+    static readonly grpc::Method<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> __Method_HalfDuplexCall = new grpc::Method<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse>(
+        grpc::MethodType.DuplexStreaming,
         __ServiceName,
         "HalfDuplexCall",
         __Marshaller_StreamingOutputCallRequest,
         __Marshaller_StreamingOutputCallResponse);
 
-    static readonly Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty> __Method_UnimplementedCall = new Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty>(
-        MethodType.Unary,
+    static readonly grpc::Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty> __Method_UnimplementedCall = new grpc::Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty>(
+        grpc::MethodType.Unary,
         __ServiceName,
         "UnimplementedCall",
         __Marshaller_Empty,
@@ -128,9 +128,9 @@
       /// <param name="request">The request received from the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>The response to send back to the client (wrapped by a task).</returns>
-      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> EmptyCall(global::Grpc.Testing.Empty request, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> EmptyCall(global::Grpc.Testing.Empty request, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -139,9 +139,9 @@
       /// <param name="request">The request received from the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>The response to send back to the client (wrapped by a task).</returns>
-      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.SimpleResponse> UnaryCall(global::Grpc.Testing.SimpleRequest request, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.SimpleResponse> UnaryCall(global::Grpc.Testing.SimpleRequest request, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -152,9 +152,9 @@
       /// <param name="request">The request received from the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>The response to send back to the client (wrapped by a task).</returns>
-      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.SimpleResponse> CacheableUnaryCall(global::Grpc.Testing.SimpleRequest request, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.SimpleResponse> CacheableUnaryCall(global::Grpc.Testing.SimpleRequest request, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -165,9 +165,9 @@
       /// <param name="responseStream">Used for sending responses back to the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>A task indicating completion of the handler.</returns>
-      public virtual global::System.Threading.Tasks.Task StreamingOutputCall(global::Grpc.Testing.StreamingOutputCallRequest request, IServerStreamWriter<global::Grpc.Testing.StreamingOutputCallResponse> responseStream, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task StreamingOutputCall(global::Grpc.Testing.StreamingOutputCallRequest request, grpc::IServerStreamWriter<global::Grpc.Testing.StreamingOutputCallResponse> responseStream, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -177,9 +177,9 @@
       /// <param name="requestStream">Used for reading requests from the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>The response to send back to the client (wrapped by a task).</returns>
-      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.StreamingInputCallResponse> StreamingInputCall(IAsyncStreamReader<global::Grpc.Testing.StreamingInputCallRequest> requestStream, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.StreamingInputCallResponse> StreamingInputCall(grpc::IAsyncStreamReader<global::Grpc.Testing.StreamingInputCallRequest> requestStream, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -191,9 +191,9 @@
       /// <param name="responseStream">Used for sending responses back to the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>A task indicating completion of the handler.</returns>
-      public virtual global::System.Threading.Tasks.Task FullDuplexCall(IAsyncStreamReader<global::Grpc.Testing.StreamingOutputCallRequest> requestStream, IServerStreamWriter<global::Grpc.Testing.StreamingOutputCallResponse> responseStream, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task FullDuplexCall(grpc::IAsyncStreamReader<global::Grpc.Testing.StreamingOutputCallRequest> requestStream, grpc::IServerStreamWriter<global::Grpc.Testing.StreamingOutputCallResponse> responseStream, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -206,9 +206,9 @@
       /// <param name="responseStream">Used for sending responses back to the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>A task indicating completion of the handler.</returns>
-      public virtual global::System.Threading.Tasks.Task HalfDuplexCall(IAsyncStreamReader<global::Grpc.Testing.StreamingOutputCallRequest> requestStream, IServerStreamWriter<global::Grpc.Testing.StreamingOutputCallResponse> responseStream, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task HalfDuplexCall(grpc::IAsyncStreamReader<global::Grpc.Testing.StreamingOutputCallRequest> requestStream, grpc::IServerStreamWriter<global::Grpc.Testing.StreamingOutputCallResponse> responseStream, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
       /// <summary>
@@ -218,24 +218,24 @@
       /// <param name="request">The request received from the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>The response to send back to the client (wrapped by a task).</returns>
-      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> UnimplementedCall(global::Grpc.Testing.Empty request, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> UnimplementedCall(global::Grpc.Testing.Empty request, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
     }
 
     /// <summary>Client for TestService</summary>
-    public partial class TestServiceClient : ClientBase<TestServiceClient>
+    public partial class TestServiceClient : grpc::ClientBase<TestServiceClient>
     {
       /// <summary>Creates a new client for TestService</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
-      public TestServiceClient(Channel channel) : base(channel)
+      public TestServiceClient(grpc::Channel channel) : base(channel)
       {
       }
       /// <summary>Creates a new client for TestService that uses a custom <c>CallInvoker</c>.</summary>
       /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
-      public TestServiceClient(CallInvoker callInvoker) : base(callInvoker)
+      public TestServiceClient(grpc::CallInvoker callInvoker) : base(callInvoker)
       {
       }
       /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
@@ -256,9 +256,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.Empty EmptyCall(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual global::Grpc.Testing.Empty EmptyCall(global::Grpc.Testing.Empty request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return EmptyCall(request, new CallOptions(headers, deadline, cancellationToken));
+        return EmptyCall(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// One empty request followed by one empty response.
@@ -266,7 +266,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.Empty EmptyCall(global::Grpc.Testing.Empty request, CallOptions options)
+      public virtual global::Grpc.Testing.Empty EmptyCall(global::Grpc.Testing.Empty request, grpc::CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_EmptyCall, null, options, request);
       }
@@ -278,9 +278,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.Empty> EmptyCallAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.Empty> EmptyCallAsync(global::Grpc.Testing.Empty request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return EmptyCallAsync(request, new CallOptions(headers, deadline, cancellationToken));
+        return EmptyCallAsync(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// One empty request followed by one empty response.
@@ -288,7 +288,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.Empty> EmptyCallAsync(global::Grpc.Testing.Empty request, CallOptions options)
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.Empty> EmptyCallAsync(global::Grpc.Testing.Empty request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_EmptyCall, null, options, request);
       }
@@ -300,9 +300,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return UnaryCall(request, new CallOptions(headers, deadline, cancellationToken));
+        return UnaryCall(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// One request followed by one response.
@@ -310,7 +310,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, CallOptions options)
+      public virtual global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, grpc::CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_UnaryCall, null, options, request);
       }
@@ -322,9 +322,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return UnaryCallAsync(request, new CallOptions(headers, deadline, cancellationToken));
+        return UnaryCallAsync(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// One request followed by one response.
@@ -332,7 +332,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, CallOptions options)
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_UnaryCall, null, options, request);
       }
@@ -346,9 +346,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.SimpleResponse CacheableUnaryCall(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual global::Grpc.Testing.SimpleResponse CacheableUnaryCall(global::Grpc.Testing.SimpleRequest request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return CacheableUnaryCall(request, new CallOptions(headers, deadline, cancellationToken));
+        return CacheableUnaryCall(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// One request followed by one response. Response has cache control
@@ -358,7 +358,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.SimpleResponse CacheableUnaryCall(global::Grpc.Testing.SimpleRequest request, CallOptions options)
+      public virtual global::Grpc.Testing.SimpleResponse CacheableUnaryCall(global::Grpc.Testing.SimpleRequest request, grpc::CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_CacheableUnaryCall, null, options, request);
       }
@@ -372,9 +372,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> CacheableUnaryCallAsync(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> CacheableUnaryCallAsync(global::Grpc.Testing.SimpleRequest request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return CacheableUnaryCallAsync(request, new CallOptions(headers, deadline, cancellationToken));
+        return CacheableUnaryCallAsync(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// One request followed by one response. Response has cache control
@@ -384,7 +384,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> CacheableUnaryCallAsync(global::Grpc.Testing.SimpleRequest request, CallOptions options)
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> CacheableUnaryCallAsync(global::Grpc.Testing.SimpleRequest request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_CacheableUnaryCall, null, options, request);
       }
@@ -397,9 +397,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncServerStreamingCall<global::Grpc.Testing.StreamingOutputCallResponse> StreamingOutputCall(global::Grpc.Testing.StreamingOutputCallRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncServerStreamingCall<global::Grpc.Testing.StreamingOutputCallResponse> StreamingOutputCall(global::Grpc.Testing.StreamingOutputCallRequest request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return StreamingOutputCall(request, new CallOptions(headers, deadline, cancellationToken));
+        return StreamingOutputCall(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// One request followed by a sequence of responses (streamed download).
@@ -408,7 +408,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncServerStreamingCall<global::Grpc.Testing.StreamingOutputCallResponse> StreamingOutputCall(global::Grpc.Testing.StreamingOutputCallRequest request, CallOptions options)
+      public virtual grpc::AsyncServerStreamingCall<global::Grpc.Testing.StreamingOutputCallResponse> StreamingOutputCall(global::Grpc.Testing.StreamingOutputCallRequest request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncServerStreamingCall(__Method_StreamingOutputCall, null, options, request);
       }
@@ -420,9 +420,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncClientStreamingCall<global::Grpc.Testing.StreamingInputCallRequest, global::Grpc.Testing.StreamingInputCallResponse> StreamingInputCall(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncClientStreamingCall<global::Grpc.Testing.StreamingInputCallRequest, global::Grpc.Testing.StreamingInputCallResponse> StreamingInputCall(grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return StreamingInputCall(new CallOptions(headers, deadline, cancellationToken));
+        return StreamingInputCall(new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// A sequence of requests followed by one response (streamed upload).
@@ -430,7 +430,7 @@
       /// </summary>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncClientStreamingCall<global::Grpc.Testing.StreamingInputCallRequest, global::Grpc.Testing.StreamingInputCallResponse> StreamingInputCall(CallOptions options)
+      public virtual grpc::AsyncClientStreamingCall<global::Grpc.Testing.StreamingInputCallRequest, global::Grpc.Testing.StreamingInputCallResponse> StreamingInputCall(grpc::CallOptions options)
       {
         return CallInvoker.AsyncClientStreamingCall(__Method_StreamingInputCall, null, options);
       }
@@ -443,9 +443,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> FullDuplexCall(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> FullDuplexCall(grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return FullDuplexCall(new CallOptions(headers, deadline, cancellationToken));
+        return FullDuplexCall(new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// A sequence of requests with each request served by the server immediately.
@@ -454,7 +454,7 @@
       /// </summary>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> FullDuplexCall(CallOptions options)
+      public virtual grpc::AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> FullDuplexCall(grpc::CallOptions options)
       {
         return CallInvoker.AsyncDuplexStreamingCall(__Method_FullDuplexCall, null, options);
       }
@@ -468,9 +468,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> HalfDuplexCall(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> HalfDuplexCall(grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return HalfDuplexCall(new CallOptions(headers, deadline, cancellationToken));
+        return HalfDuplexCall(new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// A sequence of requests followed by a sequence of responses.
@@ -480,7 +480,7 @@
       /// </summary>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> HalfDuplexCall(CallOptions options)
+      public virtual grpc::AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> HalfDuplexCall(grpc::CallOptions options)
       {
         return CallInvoker.AsyncDuplexStreamingCall(__Method_HalfDuplexCall, null, options);
       }
@@ -493,9 +493,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return UnimplementedCall(request, new CallOptions(headers, deadline, cancellationToken));
+        return UnimplementedCall(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// The test server will not implement this method. It will be used
@@ -504,7 +504,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, CallOptions options)
+      public virtual global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, grpc::CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_UnimplementedCall, null, options, request);
       }
@@ -517,9 +517,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return UnimplementedCallAsync(request, new CallOptions(headers, deadline, cancellationToken));
+        return UnimplementedCallAsync(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// The test server will not implement this method. It will be used
@@ -528,7 +528,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, CallOptions options)
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_UnimplementedCall, null, options, request);
       }
@@ -541,9 +541,9 @@
 
     /// <summary>Creates service definition that can be registered with a server</summary>
     /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
-    public static ServerServiceDefinition BindService(TestServiceBase serviceImpl)
+    public static grpc::ServerServiceDefinition BindService(TestServiceBase serviceImpl)
     {
-      return ServerServiceDefinition.CreateBuilder()
+      return grpc::ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_EmptyCall, serviceImpl.EmptyCall)
           .AddMethod(__Method_UnaryCall, serviceImpl.UnaryCall)
           .AddMethod(__Method_CacheableUnaryCall, serviceImpl.CacheableUnaryCall)
@@ -563,10 +563,10 @@
   {
     static readonly string __ServiceName = "grpc.testing.UnimplementedService";
 
-    static readonly Marshaller<global::Grpc.Testing.Empty> __Marshaller_Empty = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.Empty.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.Empty> __Marshaller_Empty = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.Empty.Parser.ParseFrom);
 
-    static readonly Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty> __Method_UnimplementedCall = new Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty>(
-        MethodType.Unary,
+    static readonly grpc::Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty> __Method_UnimplementedCall = new grpc::Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty>(
+        grpc::MethodType.Unary,
         __ServiceName,
         "UnimplementedCall",
         __Marshaller_Empty,
@@ -587,24 +587,24 @@
       /// <param name="request">The request received from the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>The response to send back to the client (wrapped by a task).</returns>
-      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> UnimplementedCall(global::Grpc.Testing.Empty request, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> UnimplementedCall(global::Grpc.Testing.Empty request, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
     }
 
     /// <summary>Client for UnimplementedService</summary>
-    public partial class UnimplementedServiceClient : ClientBase<UnimplementedServiceClient>
+    public partial class UnimplementedServiceClient : grpc::ClientBase<UnimplementedServiceClient>
     {
       /// <summary>Creates a new client for UnimplementedService</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
-      public UnimplementedServiceClient(Channel channel) : base(channel)
+      public UnimplementedServiceClient(grpc::Channel channel) : base(channel)
       {
       }
       /// <summary>Creates a new client for UnimplementedService that uses a custom <c>CallInvoker</c>.</summary>
       /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
-      public UnimplementedServiceClient(CallInvoker callInvoker) : base(callInvoker)
+      public UnimplementedServiceClient(grpc::CallInvoker callInvoker) : base(callInvoker)
       {
       }
       /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
@@ -625,9 +625,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return UnimplementedCall(request, new CallOptions(headers, deadline, cancellationToken));
+        return UnimplementedCall(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// A call that no server should implement
@@ -635,7 +635,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The response received from the server.</returns>
-      public virtual global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, CallOptions options)
+      public virtual global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, grpc::CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_UnimplementedCall, null, options, request);
       }
@@ -647,9 +647,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return UnimplementedCallAsync(request, new CallOptions(headers, deadline, cancellationToken));
+        return UnimplementedCallAsync(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// A call that no server should implement
@@ -657,7 +657,7 @@
       /// <param name="request">The request to send to the server.</param>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, CallOptions options)
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_UnimplementedCall, null, options, request);
       }
@@ -670,9 +670,9 @@
 
     /// <summary>Creates service definition that can be registered with a server</summary>
     /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
-    public static ServerServiceDefinition BindService(UnimplementedServiceBase serviceImpl)
+    public static grpc::ServerServiceDefinition BindService(UnimplementedServiceBase serviceImpl)
     {
-      return ServerServiceDefinition.CreateBuilder()
+      return grpc::ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_UnimplementedCall, serviceImpl.UnimplementedCall).Build();
     }
 
@@ -684,19 +684,19 @@
   {
     static readonly string __ServiceName = "grpc.testing.ReconnectService";
 
-    static readonly Marshaller<global::Grpc.Testing.ReconnectParams> __Marshaller_ReconnectParams = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ReconnectParams.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.Empty> __Marshaller_Empty = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.Empty.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Testing.ReconnectInfo> __Marshaller_ReconnectInfo = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ReconnectInfo.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.ReconnectParams> __Marshaller_ReconnectParams = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ReconnectParams.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.Empty> __Marshaller_Empty = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.Empty.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Testing.ReconnectInfo> __Marshaller_ReconnectInfo = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ReconnectInfo.Parser.ParseFrom);
 
-    static readonly Method<global::Grpc.Testing.ReconnectParams, global::Grpc.Testing.Empty> __Method_Start = new Method<global::Grpc.Testing.ReconnectParams, global::Grpc.Testing.Empty>(
-        MethodType.Unary,
+    static readonly grpc::Method<global::Grpc.Testing.ReconnectParams, global::Grpc.Testing.Empty> __Method_Start = new grpc::Method<global::Grpc.Testing.ReconnectParams, global::Grpc.Testing.Empty>(
+        grpc::MethodType.Unary,
         __ServiceName,
         "Start",
         __Marshaller_ReconnectParams,
         __Marshaller_Empty);
 
-    static readonly Method<global::Grpc.Testing.Empty, global::Grpc.Testing.ReconnectInfo> __Method_Stop = new Method<global::Grpc.Testing.Empty, global::Grpc.Testing.ReconnectInfo>(
-        MethodType.Unary,
+    static readonly grpc::Method<global::Grpc.Testing.Empty, global::Grpc.Testing.ReconnectInfo> __Method_Stop = new grpc::Method<global::Grpc.Testing.Empty, global::Grpc.Testing.ReconnectInfo>(
+        grpc::MethodType.Unary,
         __ServiceName,
         "Stop",
         __Marshaller_Empty,
@@ -711,29 +711,29 @@
     /// <summary>Base class for server-side implementations of ReconnectService</summary>
     public abstract partial class ReconnectServiceBase
     {
-      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> Start(global::Grpc.Testing.ReconnectParams request, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> Start(global::Grpc.Testing.ReconnectParams request, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
-      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.ReconnectInfo> Stop(global::Grpc.Testing.Empty request, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task<global::Grpc.Testing.ReconnectInfo> Stop(global::Grpc.Testing.Empty request, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
     }
 
     /// <summary>Client for ReconnectService</summary>
-    public partial class ReconnectServiceClient : ClientBase<ReconnectServiceClient>
+    public partial class ReconnectServiceClient : grpc::ClientBase<ReconnectServiceClient>
     {
       /// <summary>Creates a new client for ReconnectService</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
-      public ReconnectServiceClient(Channel channel) : base(channel)
+      public ReconnectServiceClient(grpc::Channel channel) : base(channel)
       {
       }
       /// <summary>Creates a new client for ReconnectService that uses a custom <c>CallInvoker</c>.</summary>
       /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
-      public ReconnectServiceClient(CallInvoker callInvoker) : base(callInvoker)
+      public ReconnectServiceClient(grpc::CallInvoker callInvoker) : base(callInvoker)
       {
       }
       /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
@@ -746,35 +746,35 @@
       {
       }
 
-      public virtual global::Grpc.Testing.Empty Start(global::Grpc.Testing.ReconnectParams request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual global::Grpc.Testing.Empty Start(global::Grpc.Testing.ReconnectParams request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return Start(request, new CallOptions(headers, deadline, cancellationToken));
+        return Start(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
-      public virtual global::Grpc.Testing.Empty Start(global::Grpc.Testing.ReconnectParams request, CallOptions options)
+      public virtual global::Grpc.Testing.Empty Start(global::Grpc.Testing.ReconnectParams request, grpc::CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_Start, null, options, request);
       }
-      public virtual AsyncUnaryCall<global::Grpc.Testing.Empty> StartAsync(global::Grpc.Testing.ReconnectParams request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.Empty> StartAsync(global::Grpc.Testing.ReconnectParams request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return StartAsync(request, new CallOptions(headers, deadline, cancellationToken));
+        return StartAsync(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
-      public virtual AsyncUnaryCall<global::Grpc.Testing.Empty> StartAsync(global::Grpc.Testing.ReconnectParams request, CallOptions options)
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.Empty> StartAsync(global::Grpc.Testing.ReconnectParams request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_Start, null, options, request);
       }
-      public virtual global::Grpc.Testing.ReconnectInfo Stop(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual global::Grpc.Testing.ReconnectInfo Stop(global::Grpc.Testing.Empty request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return Stop(request, new CallOptions(headers, deadline, cancellationToken));
+        return Stop(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
-      public virtual global::Grpc.Testing.ReconnectInfo Stop(global::Grpc.Testing.Empty request, CallOptions options)
+      public virtual global::Grpc.Testing.ReconnectInfo Stop(global::Grpc.Testing.Empty request, grpc::CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_Stop, null, options, request);
       }
-      public virtual AsyncUnaryCall<global::Grpc.Testing.ReconnectInfo> StopAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.ReconnectInfo> StopAsync(global::Grpc.Testing.Empty request, grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return StopAsync(request, new CallOptions(headers, deadline, cancellationToken));
+        return StopAsync(request, new grpc::CallOptions(headers, deadline, cancellationToken));
       }
-      public virtual AsyncUnaryCall<global::Grpc.Testing.ReconnectInfo> StopAsync(global::Grpc.Testing.Empty request, CallOptions options)
+      public virtual grpc::AsyncUnaryCall<global::Grpc.Testing.ReconnectInfo> StopAsync(global::Grpc.Testing.Empty request, grpc::CallOptions options)
       {
         return CallInvoker.AsyncUnaryCall(__Method_Stop, null, options, request);
       }
@@ -787,9 +787,9 @@
 
     /// <summary>Creates service definition that can be registered with a server</summary>
     /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
-    public static ServerServiceDefinition BindService(ReconnectServiceBase serviceImpl)
+    public static grpc::ServerServiceDefinition BindService(ReconnectServiceBase serviceImpl)
     {
-      return ServerServiceDefinition.CreateBuilder()
+      return grpc::ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_Start, serviceImpl.Start)
           .AddMethod(__Method_Stop, serviceImpl.Stop).Build();
     }
diff --git a/src/csharp/Grpc.Reflection/ReflectionGrpc.cs b/src/csharp/Grpc.Reflection/ReflectionGrpc.cs
index 5bd7558..4532158 100644
--- a/src/csharp/Grpc.Reflection/ReflectionGrpc.cs
+++ b/src/csharp/Grpc.Reflection/ReflectionGrpc.cs
@@ -37,18 +37,18 @@
 using System;
 using System.Threading;
 using System.Threading.Tasks;
-using Grpc.Core;
+using grpc = global::Grpc.Core;
 
 namespace Grpc.Reflection.V1Alpha {
   public static partial class ServerReflection
   {
     static readonly string __ServiceName = "grpc.reflection.v1alpha.ServerReflection";
 
-    static readonly Marshaller<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest> __Marshaller_ServerReflectionRequest = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Reflection.V1Alpha.ServerReflectionRequest.Parser.ParseFrom);
-    static readonly Marshaller<global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> __Marshaller_ServerReflectionResponse = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Reflection.V1Alpha.ServerReflectionResponse.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest> __Marshaller_ServerReflectionRequest = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Reflection.V1Alpha.ServerReflectionRequest.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> __Marshaller_ServerReflectionResponse = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Reflection.V1Alpha.ServerReflectionResponse.Parser.ParseFrom);
 
-    static readonly Method<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest, global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> __Method_ServerReflectionInfo = new Method<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest, global::Grpc.Reflection.V1Alpha.ServerReflectionResponse>(
-        MethodType.DuplexStreaming,
+    static readonly grpc::Method<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest, global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> __Method_ServerReflectionInfo = new grpc::Method<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest, global::Grpc.Reflection.V1Alpha.ServerReflectionResponse>(
+        grpc::MethodType.DuplexStreaming,
         __ServiceName,
         "ServerReflectionInfo",
         __Marshaller_ServerReflectionRequest,
@@ -71,24 +71,24 @@
       /// <param name="responseStream">Used for sending responses back to the client.</param>
       /// <param name="context">The context of the server-side call handler being invoked.</param>
       /// <returns>A task indicating completion of the handler.</returns>
-      public virtual global::System.Threading.Tasks.Task ServerReflectionInfo(IAsyncStreamReader<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest> requestStream, IServerStreamWriter<global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> responseStream, ServerCallContext context)
+      public virtual global::System.Threading.Tasks.Task ServerReflectionInfo(grpc::IAsyncStreamReader<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest> requestStream, grpc::IServerStreamWriter<global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> responseStream, grpc::ServerCallContext context)
       {
-        throw new RpcException(new Status(StatusCode.Unimplemented, ""));
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
       }
 
     }
 
     /// <summary>Client for ServerReflection</summary>
-    public partial class ServerReflectionClient : ClientBase<ServerReflectionClient>
+    public partial class ServerReflectionClient : grpc::ClientBase<ServerReflectionClient>
     {
       /// <summary>Creates a new client for ServerReflection</summary>
       /// <param name="channel">The channel to use to make remote calls.</param>
-      public ServerReflectionClient(Channel channel) : base(channel)
+      public ServerReflectionClient(grpc::Channel channel) : base(channel)
       {
       }
       /// <summary>Creates a new client for ServerReflection that uses a custom <c>CallInvoker</c>.</summary>
       /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
-      public ServerReflectionClient(CallInvoker callInvoker) : base(callInvoker)
+      public ServerReflectionClient(grpc::CallInvoker callInvoker) : base(callInvoker)
       {
       }
       /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
@@ -109,9 +109,9 @@
       /// <param name="deadline">An optional deadline for the call. The call will be cancelled if deadline is hit.</param>
       /// <param name="cancellationToken">An optional token for canceling the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncDuplexStreamingCall<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest, global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> ServerReflectionInfo(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      public virtual grpc::AsyncDuplexStreamingCall<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest, global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> ServerReflectionInfo(grpc::Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        return ServerReflectionInfo(new CallOptions(headers, deadline, cancellationToken));
+        return ServerReflectionInfo(new grpc::CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
       /// The reflection service is structured as a bidirectional stream, ensuring
@@ -119,7 +119,7 @@
       /// </summary>
       /// <param name="options">The options for the call.</param>
       /// <returns>The call object.</returns>
-      public virtual AsyncDuplexStreamingCall<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest, global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> ServerReflectionInfo(CallOptions options)
+      public virtual grpc::AsyncDuplexStreamingCall<global::Grpc.Reflection.V1Alpha.ServerReflectionRequest, global::Grpc.Reflection.V1Alpha.ServerReflectionResponse> ServerReflectionInfo(grpc::CallOptions options)
       {
         return CallInvoker.AsyncDuplexStreamingCall(__Method_ServerReflectionInfo, null, options);
       }
@@ -132,9 +132,9 @@
 
     /// <summary>Creates service definition that can be registered with a server</summary>
     /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
-    public static ServerServiceDefinition BindService(ServerReflectionBase serviceImpl)
+    public static grpc::ServerServiceDefinition BindService(ServerReflectionBase serviceImpl)
     {
-      return ServerServiceDefinition.CreateBuilder()
+      return grpc::ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_ServerReflectionInfo, serviceImpl.ServerReflectionInfo).Build();
     }
 
diff --git a/src/node/ext/server_uv.cc b/src/node/ext/server_uv.cc
index bf8b609..c5e5ca9 100644
--- a/src/node/ext/server_uv.cc
+++ b/src/node/ext/server_uv.cc
@@ -47,12 +47,12 @@
 namespace node {
 
 using Nan::Callback;
+using Nan::MaybeLocal;
 
 using v8::External;
 using v8::Function;
 using v8::FunctionTemplate;
 using v8::Local;
-using v8::MaybeLocal;
 using v8::Object;
 using v8::Value;
 
diff --git a/src/node/src/common.js b/src/node/src/common.js
index 98eabf5..a0fe448 100644
--- a/src/node/src/common.js
+++ b/src/node/src/common.js
@@ -149,6 +149,7 @@
     return _.camelCase(method.name);
   }), _.map(service.children, function(method) {
     return {
+      originalName: method.name,
       path: prefix + method.name,
       requestStream: method.requestStream,
       responseStream: method.responseStream,
diff --git a/src/node/src/server.js b/src/node/src/server.js
index a5a0ea2..bdb4a56 100644
--- a/src/node/src/server.js
+++ b/src/node/src/server.js
@@ -755,9 +755,16 @@
     }
     var impl;
     if (implementation[name] === undefined) {
-      common.log(grpc.logVerbosity.ERROR, 'Method handler for ' +
-          attrs.path + ' expected but not provided');
-      impl = defaultHandler[method_type];
+      /* Handle the case where the method is passed with the name exactly as
+         written in the proto file, instead of using JavaScript function
+         naming style */
+      if (implementation[attrs.originalName] === undefined) {
+        common.log(grpc.logVerbosity.ERROR, 'Method handler ' + name + ' for ' +
+            attrs.path + ' expected but not provided');
+        impl = defaultHandler[method_type];
+      } else {
+        impl = _.bind(implementation[attrs.originalName], implementation);
+      }
     } else {
       impl = _.bind(implementation[name], implementation);
     }
diff --git a/src/node/test/surface_test.js b/src/node/test/surface_test.js
index 2636ea8..1d73956 100644
--- a/src/node/test/surface_test.js
+++ b/src/node/test/surface_test.js
@@ -143,6 +143,32 @@
       server.addProtoService(mathService, dummyImpls);
     });
   });
+  it('Should allow method names as originally written', function() {
+    var altDummyImpls = {
+      'Div': function() {},
+      'DivMany': function() {},
+      'Fib': function() {},
+      'Sum': function() {}
+    };
+    assert.doesNotThrow(function() {
+      server.addProtoService(mathService, altDummyImpls);
+    });
+  });
+  it('Should have a conflict between name variations', function() {
+    /* This is really testing that both name variations are actually used,
+       by checking that the method actually gets registered, for the
+       corresponding function, in both cases */
+    var altDummyImpls = {
+      'Div': function() {},
+      'DivMany': function() {},
+      'Fib': function() {},
+      'Sum': function() {}
+    };
+    server.addProtoService(mathService, altDummyImpls);
+    assert.throws(function() {
+      server.addProtoService(mathService, dummyImpls);
+    });
+  });
   it('Should fail if the server has been started', function() {
     server.start();
     assert.throws(function() {
diff --git "a/src/objective-c/\041ProtoCompiler-gRPCPlugin.podspec" "b/src/objective-c/\041ProtoCompiler-gRPCPlugin.podspec"
index ab8f82a..2f41ad1 100644
--- "a/src/objective-c/\041ProtoCompiler-gRPCPlugin.podspec"
+++ "b/src/objective-c/\041ProtoCompiler-gRPCPlugin.podspec"
@@ -101,9 +101,9 @@
   s.preserve_paths = plugin
 
   # Restrict the protoc version to the one supported by this plugin.
-  s.dependency '!ProtoCompiler', '3.1.0'
+  s.dependency '!ProtoCompiler', '3.2.0'
   # For the Protobuf dependency not to complain:
-  s.ios.deployment_target = '7.1'
+  s.ios.deployment_target = '7.0'
   s.osx.deployment_target = '10.9'
   # Restrict the gRPC runtime version to the one supported by this plugin.
   s.dependency 'gRPC-ProtoRPC', v
diff --git "a/src/objective-c/\041ProtoCompiler.podspec" "b/src/objective-c/\041ProtoCompiler.podspec"
index dc4d8e9..2e9b944 100644
--- "a/src/objective-c/\041ProtoCompiler.podspec"
+++ "b/src/objective-c/\041ProtoCompiler.podspec"
@@ -36,7 +36,7 @@
   # exclamation mark ensures that other "regular" pods will be able to find it as it'll be installed
   # before them.
   s.name     = '!ProtoCompiler'
-  v = '3.1.0'
+  v = '3.2.0'
   s.version  = v
   s.summary  = 'The Protobuf Compiler (protoc) generates Objective-C files from .proto files'
   s.description = <<-DESC
@@ -110,7 +110,7 @@
   # Restrict the protobuf runtime version to the one supported by this version of protoc.
   s.dependency 'Protobuf', '~> 3.0'
   # For the Protobuf dependency not to complain:
-  s.ios.deployment_target = '7.1'
+  s.ios.deployment_target = '7.0'
   s.osx.deployment_target = '10.9'
 
   # This is only for local development of protoc: If the Podfile brings this pod from a local
diff --git a/src/objective-c/tests/CronetUnitTests/CronetUnitTests.m b/src/objective-c/tests/CronetUnitTests/CronetUnitTests.m
index e97f3d2..a76e454 100644
--- a/src/objective-c/tests/CronetUnitTests/CronetUnitTests.m
+++ b/src/objective-c/tests/CronetUnitTests/CronetUnitTests.m
@@ -187,6 +187,18 @@
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
 
+  int sl = socket(AF_INET, SOCK_STREAM, 0);
+  GPR_ASSERT(sl >= 0);
+
+  // Make an TCP endpoint to accept the connection
+  struct sockaddr_in s_addr;
+  memset(&s_addr, 0, sizeof(s_addr));
+  s_addr.sin_family = AF_INET;
+  s_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+  s_addr.sin_port = htons(port);
+  GPR_ASSERT(0 == bind(sl, (struct sockaddr *)&s_addr, sizeof(s_addr)));
+  GPR_ASSERT(0 == listen(sl, 5));
+
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
@@ -226,17 +238,6 @@
 
   dispatch_async(
       dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
-        int sl = socket(AF_INET, SOCK_STREAM, 0);
-        GPR_ASSERT(sl >= 0);
-
-        // Make and TCP endpoint to accept the connection
-        struct sockaddr_in s_addr;
-        memset(&s_addr, 0, sizeof(s_addr));
-        s_addr.sin_family = AF_INET;
-        s_addr.sin_addr.s_addr = htonl(INADDR_ANY);
-        s_addr.sin_port = htons(port);
-        GPR_ASSERT(0 == bind(sl, (struct sockaddr *)&s_addr, sizeof(s_addr)));
-        GPR_ASSERT(0 == listen(sl, 5));
         int s = accept(sl, NULL, NULL);
         GPR_ASSERT(s >= 0);
 
@@ -324,17 +325,18 @@
   __weak XCTestExpectation *expectation =
       [self expectationWithDescription:@"Coalescing"];
 
+  int sl = socket(AF_INET, SOCK_STREAM, 0);
+  GPR_ASSERT(sl >= 0);
+  struct sockaddr_in s_addr;
+  memset(&s_addr, 0, sizeof(s_addr));
+  s_addr.sin_family = AF_INET;
+  s_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+  s_addr.sin_port = htons(port);
+  GPR_ASSERT(0 == bind(sl, (struct sockaddr *)&s_addr, sizeof(s_addr)));
+  GPR_ASSERT(0 == listen(sl, 5));
+
   dispatch_async(
       dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
-        int sl = socket(AF_INET, SOCK_STREAM, 0);
-        GPR_ASSERT(sl >= 0);
-        struct sockaddr_in s_addr;
-        memset(&s_addr, 0, sizeof(s_addr));
-        s_addr.sin_family = AF_INET;
-        s_addr.sin_addr.s_addr = htonl(INADDR_ANY);
-        s_addr.sin_port = htons(port);
-        GPR_ASSERT(0 == bind(sl, (struct sockaddr *)&s_addr, sizeof(s_addr)));
-        GPR_ASSERT(0 == listen(sl, 5));
         int s = accept(sl, NULL, NULL);
         GPR_ASSERT(s >= 0);
         struct timeval tv;
@@ -389,9 +391,6 @@
         [expectation fulfill];
       });
 
-  // Guarantees that server is listening to the port before client connects.
-  sleep(1);
-
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
diff --git a/src/objective-c/tests/Tests.xcodeproj/xcshareddata/xcschemes/AllTests.xcscheme b/src/objective-c/tests/Tests.xcodeproj/xcshareddata/xcschemes/AllTests.xcscheme
index 49dc3fa..d1d616c 100644
--- a/src/objective-c/tests/Tests.xcodeproj/xcshareddata/xcschemes/AllTests.xcscheme
+++ b/src/objective-c/tests/Tests.xcodeproj/xcshareddata/xcschemes/AllTests.xcscheme
@@ -49,26 +49,6 @@
                </Test>
             </SkippedTests>
          </TestableReference>
-         <TestableReference
-            skipped = "NO">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "5E8A5DA31D3840B4000F8BC4"
-               BuildableName = "CoreCronetEnd2EndTests.xctest"
-               BlueprintName = "CoreCronetEnd2EndTests"
-               ReferencedContainer = "container:Tests.xcodeproj">
-            </BuildableReference>
-         </TestableReference>
-         <TestableReference
-            skipped = "NO">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "5EAD6D231E27047400002378"
-               BuildableName = "CronetUnitTests.xctest"
-               BlueprintName = "CronetUnitTests"
-               ReferencedContainer = "container:Tests.xcodeproj">
-            </BuildableReference>
-         </TestableReference>
       </Testables>
       <MacroExpansion>
          <BuildableReference
diff --git a/src/objective-c/tests/build_one_example.sh b/src/objective-c/tests/build_one_example.sh
index 9fef658..bb55ca4 100755
--- a/src/objective-c/tests/build_one_example.sh
+++ b/src/objective-c/tests/build_one_example.sh
@@ -57,6 +57,4 @@
     build \
     -workspace *.xcworkspace \
     -scheme $SCHEME \
-    -destination name="iPhone 6" \
-    | egrep "$XCODEBUILD_FILTER" \
-    | egrep -v "(GPBDictionary|GPBArray)" -
+    -destination name="iPhone 6" | xcpretty
diff --git a/src/objective-c/tests/run_tests.sh b/src/objective-c/tests/run_tests.sh
index 677459e..d217f1c 100755
--- a/src/objective-c/tests/run_tests.sh
+++ b/src/objective-c/tests/run_tests.sh
@@ -58,14 +58,22 @@
     -workspace Tests.xcworkspace \
     -scheme AllTests \
     -destination name="iPhone 6" \
-    test \
-    | egrep "$XCODEBUILD_FILTER" \
-    | egrep -v "(GPBDictionary|GPBArray)" -
+    test | xcpretty
+
+xcodebuild \
+    -workspace Tests.xcworkspace \
+    -scheme CoreCronetEnd2EndTests \
+    -destination name="iPhone 6" \
+    test | xcpretty
+
+xcodebuild \
+    -workspace Tests.xcworkspace \
+    -scheme CronetUnitTests \
+    -destination name="iPhone 6" \
+    test | xcpretty
 
 xcodebuild \
     -workspace Tests.xcworkspace \
     -scheme InteropTestsRemoteWithCronet \
     -destination name="iPhone 6" \
-    test \
-    | egrep "$XCODEBUILD_FILTER" \
-    | egrep -v "(GPBDictionary|GPBArray)" -
+    test | xcpretty
diff --git a/src/php/lib/Grpc/AbstractCall.php b/src/php/lib/Grpc/AbstractCall.php
index 40387ab..4833fdc 100644
--- a/src/php/lib/Grpc/AbstractCall.php
+++ b/src/php/lib/Grpc/AbstractCall.php
@@ -131,6 +131,8 @@
         // Proto3 implementation
         if (method_exists($data, 'encode')) {
             return $data->encode();
+        } else if (method_exists($data, 'serializeToString')) {
+            return $data->serializeToString();
         }
 
         // Protobuf-PHP implementation
@@ -154,7 +156,11 @@
         if (is_array($this->deserialize)) {
             list($className, $deserializeFunc) = $this->deserialize;
             $obj = new $className();
-            $obj->$deserializeFunc($value);
+            if (method_exists($obj, $deserializeFunc)) {
+                $obj->$deserializeFunc($value);
+            } else {
+                $obj->mergeFromString($value);
+            }
 
             return $obj;
         }
diff --git a/src/python/grpcio/grpc/__init__.py b/src/python/grpcio/grpc/__init__.py
index a4481b2..4960df3 100644
--- a/src/python/grpcio/grpc/__init__.py
+++ b/src/python/grpcio/grpc/__init__.py
@@ -1273,7 +1273,10 @@
                             credentials._credentials)
 
 
-def server(thread_pool, handlers=None, options=None):
+def server(thread_pool,
+           handlers=None,
+           options=None,
+           maximum_concurrent_rpcs=None):
     """Creates a Server with which RPCs can be serviced.
 
   Args:
@@ -1286,13 +1289,17 @@
       returned Server is started.
     options: A sequence of string-value pairs according to which to configure
       the created server.
+    maximum_concurrent_rpcs: The maximum number of concurrent RPCs this server
+      will service before returning status RESOURCE_EXHAUSTED, or None to
+      indicate no limit.
 
   Returns:
     A Server with which RPCs can be serviced.
   """
     from grpc import _server  # pylint: disable=cyclic-import
     return _server.Server(thread_pool, () if handlers is None else handlers, ()
-                          if options is None else options)
+                          if options is None else options,
+                          maximum_concurrent_rpcs)
 
 
 ###################################  __all__  #################################
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/security.pxd.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/security.pxd.pxi
index 3a952ca..9915b0e 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/security.pxd.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/security.pxd.pxi
@@ -29,4 +29,4 @@
 
 
 cdef grpc_ssl_roots_override_result ssl_roots_override_callback(
-    char **pem_root_certs) with gil
+    char **pem_root_certs) nogil
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/security.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/security.pyx.pxi
index 20fc1c5..357b033 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/security.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/security.pyx.pxi
@@ -33,12 +33,14 @@
 
 
 cdef grpc_ssl_roots_override_result ssl_roots_override_callback(
-    char **pem_root_certs) with gil:
-  temporary_pem_root_certs = pkg_resources.resource_string(
-      __name__.rstrip('.cygrpc'), '_credentials/roots.pem')
-  pem_root_certs[0] = <char *>gpr_malloc(len(temporary_pem_root_certs) + 1)
-  memcpy(
-      pem_root_certs[0], <char *>temporary_pem_root_certs,
-      len(temporary_pem_root_certs))
-  pem_root_certs[0][len(temporary_pem_root_certs)] = '\0'
+    char **pem_root_certs) nogil:
+  with gil:
+    temporary_pem_root_certs = pkg_resources.resource_string(
+        __name__.rstrip('.cygrpc'), '_credentials/roots.pem')
+    pem_root_certs[0] = <char *>gpr_malloc(len(temporary_pem_root_certs) + 1)
+    memcpy(
+        pem_root_certs[0], <char *>temporary_pem_root_certs,
+        len(temporary_pem_root_certs))
+    pem_root_certs[0][len(temporary_pem_root_certs)] = '\0'
+
   return GRPC_SSL_ROOTS_OVERRIDE_OK
diff --git a/src/python/grpcio/grpc/_cython/cygrpc.pyx b/src/python/grpcio/grpc/_cython/cygrpc.pyx
index e1bd046..274b5f1 100644
--- a/src/python/grpcio/grpc/_cython/cygrpc.pyx
+++ b/src/python/grpcio/grpc/_cython/cygrpc.pyx
@@ -47,14 +47,14 @@
 #
 # initialize gRPC
 #
-
-
 cdef extern from "Python.h":
 
-  int Py_AtExit(void(*func)())
+  int PyEval_InitThreads()
 
-
-def _initialize():
+cdef _initialize():
+  # We have Python callbacks called by c-core threads, this ensures the GIL
+  # is initialized.
+  PyEval_InitThreads()
   grpc_set_ssl_roots_override_callback(
           <grpc_ssl_roots_override_callback>ssl_roots_override_callback)
 
diff --git a/src/python/grpcio/grpc/_server.py b/src/python/grpcio/grpc/_server.py
index 84e096d..47838c2 100644
--- a/src/python/grpcio/grpc/_server.py
+++ b/src/python/grpcio/grpc/_server.py
@@ -504,37 +504,37 @@
 def _handle_unary_unary(rpc_event, state, method_handler, thread_pool):
     unary_request = _unary_request(rpc_event, state,
                                    method_handler.request_deserializer)
-    thread_pool.submit(_unary_response_in_pool, rpc_event, state,
-                       method_handler.unary_unary, unary_request,
-                       method_handler.request_deserializer,
-                       method_handler.response_serializer)
+    return thread_pool.submit(_unary_response_in_pool, rpc_event, state,
+                              method_handler.unary_unary, unary_request,
+                              method_handler.request_deserializer,
+                              method_handler.response_serializer)
 
 
 def _handle_unary_stream(rpc_event, state, method_handler, thread_pool):
     unary_request = _unary_request(rpc_event, state,
                                    method_handler.request_deserializer)
-    thread_pool.submit(_stream_response_in_pool, rpc_event, state,
-                       method_handler.unary_stream, unary_request,
-                       method_handler.request_deserializer,
-                       method_handler.response_serializer)
+    return thread_pool.submit(_stream_response_in_pool, rpc_event, state,
+                              method_handler.unary_stream, unary_request,
+                              method_handler.request_deserializer,
+                              method_handler.response_serializer)
 
 
 def _handle_stream_unary(rpc_event, state, method_handler, thread_pool):
     request_iterator = _RequestIterator(state, rpc_event.operation_call,
                                         method_handler.request_deserializer)
-    thread_pool.submit(_unary_response_in_pool, rpc_event, state,
-                       method_handler.stream_unary, lambda: request_iterator,
-                       method_handler.request_deserializer,
-                       method_handler.response_serializer)
+    return thread_pool.submit(
+        _unary_response_in_pool, rpc_event, state, method_handler.stream_unary,
+        lambda: request_iterator, method_handler.request_deserializer,
+        method_handler.response_serializer)
 
 
 def _handle_stream_stream(rpc_event, state, method_handler, thread_pool):
     request_iterator = _RequestIterator(state, rpc_event.operation_call,
                                         method_handler.request_deserializer)
-    thread_pool.submit(_stream_response_in_pool, rpc_event, state,
-                       method_handler.stream_stream, lambda: request_iterator,
-                       method_handler.request_deserializer,
-                       method_handler.response_serializer)
+    return thread_pool.submit(
+        _stream_response_in_pool, rpc_event, state,
+        method_handler.stream_stream, lambda: request_iterator,
+        method_handler.request_deserializer, method_handler.response_serializer)
 
 
 def _find_method_handler(rpc_event, generic_handlers):
@@ -549,13 +549,12 @@
         return None
 
 
-def _handle_unrecognized_method(rpc_event):
+def _reject_rpc(rpc_event, status, details):
     operations = (cygrpc.operation_send_initial_metadata(_common.EMPTY_METADATA,
                                                          _EMPTY_FLAGS),
                   cygrpc.operation_receive_close_on_server(_EMPTY_FLAGS),
                   cygrpc.operation_send_status_from_server(
-                      _common.EMPTY_METADATA, cygrpc.StatusCode.unimplemented,
-                      b'Method not found!', _EMPTY_FLAGS),)
+                      _common.EMPTY_METADATA, status, details, _EMPTY_FLAGS),)
     rpc_state = _RPCState()
     rpc_event.operation_call.start_server_batch(
         operations, lambda ignored_event: (rpc_state, (),))
@@ -572,33 +571,37 @@
         state.due.add(_RECEIVE_CLOSE_ON_SERVER_TOKEN)
         if method_handler.request_streaming:
             if method_handler.response_streaming:
-                _handle_stream_stream(rpc_event, state, method_handler,
-                                      thread_pool)
+                return state, _handle_stream_stream(rpc_event, state,
+                                                    method_handler, thread_pool)
             else:
-                _handle_stream_unary(rpc_event, state, method_handler,
-                                     thread_pool)
+                return state, _handle_stream_unary(rpc_event, state,
+                                                   method_handler, thread_pool)
         else:
             if method_handler.response_streaming:
-                _handle_unary_stream(rpc_event, state, method_handler,
-                                     thread_pool)
+                return state, _handle_unary_stream(rpc_event, state,
+                                                   method_handler, thread_pool)
             else:
-                _handle_unary_unary(rpc_event, state, method_handler,
-                                    thread_pool)
-        return state
+                return state, _handle_unary_unary(rpc_event, state,
+                                                  method_handler, thread_pool)
 
 
-def _handle_call(rpc_event, generic_handlers, thread_pool):
+def _handle_call(rpc_event, generic_handlers, thread_pool,
+                 concurrency_exceeded):
     if not rpc_event.success:
-        return None
+        return None, None
     if rpc_event.request_call_details.method is not None:
         method_handler = _find_method_handler(rpc_event, generic_handlers)
         if method_handler is None:
-            return _handle_unrecognized_method(rpc_event)
+            return _reject_rpc(rpc_event, cygrpc.StatusCode.unimplemented,
+                               b'Method not found!'), None
+        elif concurrency_exceeded:
+            return _reject_rpc(rpc_event, cygrpc.StatusCode.resource_exhausted,
+                               b'Concurrent RPC limit exceeded!'), None
         else:
             return _handle_with_method_handler(rpc_event, method_handler,
                                                thread_pool)
     else:
-        return None
+        return None, None
 
 
 @enum.unique
@@ -610,7 +613,8 @@
 
 class _ServerState(object):
 
-    def __init__(self, completion_queue, server, generic_handlers, thread_pool):
+    def __init__(self, completion_queue, server, generic_handlers, thread_pool,
+                 maximum_concurrent_rpcs):
         self.lock = threading.Lock()
         self.completion_queue = completion_queue
         self.server = server
@@ -618,6 +622,8 @@
         self.thread_pool = thread_pool
         self.stage = _ServerStage.STOPPED
         self.shutdown_events = None
+        self.maximum_concurrent_rpcs = maximum_concurrent_rpcs
+        self.active_rpc_count = 0
 
         # TODO(https://github.com/grpc/grpc/issues/6597): eliminate these fields.
         self.rpc_states = set()
@@ -657,6 +663,11 @@
         return False
 
 
+def _on_call_completed(state):
+    with state.lock:
+        state.active_rpc_count -= 1
+
+
 def _serve(state):
     while True:
         event = state.completion_queue.poll()
@@ -668,10 +679,18 @@
         elif event.tag is _REQUEST_CALL_TAG:
             with state.lock:
                 state.due.remove(_REQUEST_CALL_TAG)
-                rpc_state = _handle_call(event, state.generic_handlers,
-                                         state.thread_pool)
+                concurrency_exceeded = (
+                    state.maximum_concurrent_rpcs is not None and
+                    state.active_rpc_count >= state.maximum_concurrent_rpcs)
+                rpc_state, rpc_future = _handle_call(
+                    event, state.generic_handlers, state.thread_pool,
+                    concurrency_exceeded)
                 if rpc_state is not None:
                     state.rpc_states.add(rpc_state)
+                if rpc_future is not None:
+                    state.active_rpc_count += 1
+                    rpc_future.add_done_callback(
+                        lambda unused_future: _on_call_completed(state))
                 if state.stage is _ServerStage.STARTED:
                     _request_call(state)
                 elif _stop_serving(state):
@@ -749,12 +768,13 @@
 
 class Server(grpc.Server):
 
-    def __init__(self, thread_pool, generic_handlers, options):
+    def __init__(self, thread_pool, generic_handlers, options,
+                 maximum_concurrent_rpcs):
         completion_queue = cygrpc.CompletionQueue()
         server = cygrpc.Server(_common.channel_args(options))
         server.register_completion_queue(completion_queue)
         self._state = _ServerState(completion_queue, server, generic_handlers,
-                                   thread_pool)
+                                   thread_pool, maximum_concurrent_rpcs)
 
     def add_generic_rpc_handlers(self, generic_rpc_handlers):
         _add_generic_handlers(self._state, generic_rpc_handlers)
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index cb6ca34..258c65c 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -124,6 +124,7 @@
   'src/core/lib/iomgr/resolve_address_windows.c',
   'src/core/lib/iomgr/resource_quota.c',
   'src/core/lib/iomgr/sockaddr_utils.c',
+  'src/core/lib/iomgr/socket_factory_posix.c',
   'src/core/lib/iomgr/socket_mutator.c',
   'src/core/lib/iomgr/socket_utils_common_posix.c',
   'src/core/lib/iomgr/socket_utils_linux.c',
@@ -161,6 +162,7 @@
   'src/core/lib/json/json_reader.c',
   'src/core/lib/json/json_string.c',
   'src/core/lib/json/json_writer.c',
+  'src/core/lib/security/util/b64.c',
   'src/core/lib/slice/percent_encoding.c',
   'src/core/lib/slice/slice.c',
   'src/core/lib/slice/slice_buffer.c',
@@ -179,6 +181,7 @@
   'src/core/lib/surface/channel_ping.c',
   'src/core/lib/surface/channel_stack_type.c',
   'src/core/lib/surface/completion_queue.c',
+  'src/core/lib/surface/completion_queue_factory.c',
   'src/core/lib/surface/event_string.c',
   'src/core/lib/surface/lame_client.c',
   'src/core/lib/surface/metadata_array.c',
@@ -242,7 +245,6 @@
   'src/core/lib/security/transport/security_handshaker.c',
   'src/core/lib/security/transport/server_auth_filter.c',
   'src/core/lib/security/transport/tsi_error.c',
-  'src/core/lib/security/util/b64.c',
   'src/core/lib/security/util/json_util.c',
   'src/core/lib/surface/init_secure.c',
   'src/core/lib/tsi/fake_transport_security.c',
@@ -284,6 +286,9 @@
   'third_party/nanopb/pb_encode.c',
   'src/core/ext/lb_policy/pick_first/pick_first.c',
   'src/core/ext/lb_policy/round_robin/round_robin.c',
+  'src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c',
+  'src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c',
+  'src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c',
   'src/core/ext/resolver/dns/native/dns_resolver.c',
   'src/core/ext/resolver/sockaddr/sockaddr_resolver.c',
   'src/core/ext/load_reporting/load_reporting.c',
@@ -622,4 +627,53 @@
   'third_party/zlib/trees.c',
   'third_party/zlib/uncompr.c',
   'third_party/zlib/zutil.c',
+  'third_party/cares/cares/ares__close_sockets.c',
+  'third_party/cares/cares/ares__get_hostent.c',
+  'third_party/cares/cares/ares__read_line.c',
+  'third_party/cares/cares/ares__timeval.c',
+  'third_party/cares/cares/ares_cancel.c',
+  'third_party/cares/cares/ares_create_query.c',
+  'third_party/cares/cares/ares_data.c',
+  'third_party/cares/cares/ares_destroy.c',
+  'third_party/cares/cares/ares_expand_name.c',
+  'third_party/cares/cares/ares_expand_string.c',
+  'third_party/cares/cares/ares_fds.c',
+  'third_party/cares/cares/ares_free_hostent.c',
+  'third_party/cares/cares/ares_free_string.c',
+  'third_party/cares/cares/ares_getenv.c',
+  'third_party/cares/cares/ares_gethostbyaddr.c',
+  'third_party/cares/cares/ares_gethostbyname.c',
+  'third_party/cares/cares/ares_getnameinfo.c',
+  'third_party/cares/cares/ares_getopt.c',
+  'third_party/cares/cares/ares_getsock.c',
+  'third_party/cares/cares/ares_init.c',
+  'third_party/cares/cares/ares_library_init.c',
+  'third_party/cares/cares/ares_llist.c',
+  'third_party/cares/cares/ares_mkquery.c',
+  'third_party/cares/cares/ares_nowarn.c',
+  'third_party/cares/cares/ares_options.c',
+  'third_party/cares/cares/ares_parse_a_reply.c',
+  'third_party/cares/cares/ares_parse_aaaa_reply.c',
+  'third_party/cares/cares/ares_parse_mx_reply.c',
+  'third_party/cares/cares/ares_parse_naptr_reply.c',
+  'third_party/cares/cares/ares_parse_ns_reply.c',
+  'third_party/cares/cares/ares_parse_ptr_reply.c',
+  'third_party/cares/cares/ares_parse_soa_reply.c',
+  'third_party/cares/cares/ares_parse_srv_reply.c',
+  'third_party/cares/cares/ares_parse_txt_reply.c',
+  'third_party/cares/cares/ares_platform.c',
+  'third_party/cares/cares/ares_process.c',
+  'third_party/cares/cares/ares_query.c',
+  'third_party/cares/cares/ares_search.c',
+  'third_party/cares/cares/ares_send.c',
+  'third_party/cares/cares/ares_strcasecmp.c',
+  'third_party/cares/cares/ares_strdup.c',
+  'third_party/cares/cares/ares_strerror.c',
+  'third_party/cares/cares/ares_timeout.c',
+  'third_party/cares/cares/ares_version.c',
+  'third_party/cares/cares/ares_writev.c',
+  'third_party/cares/cares/bitncmp.c',
+  'third_party/cares/cares/inet_net_pton.c',
+  'third_party/cares/cares/inet_ntop.c',
+  'third_party/cares/cares/windows_port.c',
 ]
diff --git a/src/python/grpcio_health_checking/setup.py b/src/python/grpcio_health_checking/setup.py
index 52ee98a..17bb3ab 100644
--- a/src/python/grpcio_health_checking/setup.py
+++ b/src/python/grpcio_health_checking/setup.py
@@ -59,6 +59,10 @@
 setuptools.setup(
     name='grpcio-health-checking',
     version=grpc_version.VERSION,
+    description='Standard Health Checking Service for gRPC',
+    author='The gRPC Authors',
+    author_email='grpc-io@googlegroups.com',
+    url='http://www.grpc.io',
     license='3-clause BSD',
     package_dir=PACKAGE_DIRECTORIES,
     packages=setuptools.find_packages('.'),
diff --git a/src/python/grpcio_reflection/setup.py b/src/python/grpcio_reflection/setup.py
index e85092d..e6cf547 100644
--- a/src/python/grpcio_reflection/setup.py
+++ b/src/python/grpcio_reflection/setup.py
@@ -60,6 +60,10 @@
     name='grpcio-reflection',
     version=grpc_version.VERSION,
     license='3-clause BSD',
+    description='Standard Protobuf Reflection Service for gRPC',
+    author='The gRPC Authors',
+    author_email='grpc-io@googlegroups.com',
+    url='http://www.grpc.io',
     package_dir=PACKAGE_DIRECTORIES,
     packages=setuptools.find_packages('.'),
     install_requires=INSTALL_REQUIRES,
diff --git a/src/python/grpcio_tests/tests/tests.json b/src/python/grpcio_tests/tests/tests.json
index 70d965d..f750b05 100644
--- a/src/python/grpcio_tests/tests/tests.json
+++ b/src/python/grpcio_tests/tests/tests.json
@@ -31,6 +31,7 @@
   "unit._invocation_defects_test.InvocationDefectsTest",
   "unit._metadata_code_details_test.MetadataCodeDetailsTest",
   "unit._metadata_test.MetadataTest",
+  "unit._resource_exhausted_test.ResourceExhaustedTest",
   "unit._rpc_test.RPCTest",
   "unit._sanity._sanity_test.Sanity",
   "unit._thread_cleanup_test.CleanupThreadTest",
diff --git a/src/python/grpcio_tests/tests/unit/_resource_exhausted_test.py b/src/python/grpcio_tests/tests/unit/_resource_exhausted_test.py
new file mode 100644
index 0000000..88c82b5
--- /dev/null
+++ b/src/python/grpcio_tests/tests/unit/_resource_exhausted_test.py
@@ -0,0 +1,270 @@
+# Copyright 2017, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+"""Tests server responding with RESOURCE_EXHAUSTED."""
+
+import threading
+import unittest
+
+import grpc
+from grpc import _channel
+from grpc.framework.foundation import logging_pool
+
+from tests.unit import test_common
+from tests.unit.framework.common import test_constants
+
+_REQUEST = b'\x00\x00\x00'
+_RESPONSE = b'\x00\x00\x00'
+
+_UNARY_UNARY = '/test/UnaryUnary'
+_UNARY_STREAM = '/test/UnaryStream'
+_STREAM_UNARY = '/test/StreamUnary'
+_STREAM_STREAM = '/test/StreamStream'
+
+
+class _TestTrigger(object):
+
+    def __init__(self, total_call_count):
+        self._total_call_count = total_call_count
+        self._pending_calls = 0
+        self._triggered = False
+        self._finish_condition = threading.Condition()
+        self._start_condition = threading.Condition()
+
+    # Wait for all calls be be blocked in their handler
+    def await_calls(self):
+        with self._start_condition:
+            while self._pending_calls < self._total_call_count:
+                self._start_condition.wait()
+
+    # Block in a response handler and wait for a trigger
+    def await_trigger(self):
+        with self._start_condition:
+            self._pending_calls += 1
+            self._start_condition.notify()
+
+        with self._finish_condition:
+            if not self._triggered:
+                self._finish_condition.wait()
+
+    # Finish all response handlers
+    def trigger(self):
+        with self._finish_condition:
+            self._triggered = True
+            self._finish_condition.notify_all()
+
+
+def handle_unary_unary(trigger, request, servicer_context):
+    trigger.await_trigger()
+    return _RESPONSE
+
+
+def handle_unary_stream(trigger, request, servicer_context):
+    trigger.await_trigger()
+    for _ in range(test_constants.STREAM_LENGTH):
+        yield _RESPONSE
+
+
+def handle_stream_unary(trigger, request_iterator, servicer_context):
+    trigger.await_trigger()
+    # TODO(issue:#6891) We should be able to remove this loop
+    for request in request_iterator:
+        pass
+    return _RESPONSE
+
+
+def handle_stream_stream(trigger, request_iterator, servicer_context):
+    trigger.await_trigger()
+    # TODO(issue:#6891) We should be able to remove this loop,
+    # and replace with return; yield
+    for request in request_iterator:
+        yield _RESPONSE
+
+
+class _MethodHandler(grpc.RpcMethodHandler):
+
+    def __init__(self, trigger, request_streaming, response_streaming):
+        self.request_streaming = request_streaming
+        self.response_streaming = response_streaming
+        self.request_deserializer = None
+        self.response_serializer = None
+        self.unary_unary = None
+        self.unary_stream = None
+        self.stream_unary = None
+        self.stream_stream = None
+        if self.request_streaming and self.response_streaming:
+            self.stream_stream = (
+                lambda x, y: handle_stream_stream(trigger, x, y))
+        elif self.request_streaming:
+            self.stream_unary = lambda x, y: handle_stream_unary(trigger, x, y)
+        elif self.response_streaming:
+            self.unary_stream = lambda x, y: handle_unary_stream(trigger, x, y)
+        else:
+            self.unary_unary = lambda x, y: handle_unary_unary(trigger, x, y)
+
+
+class _GenericHandler(grpc.GenericRpcHandler):
+
+    def __init__(self, trigger):
+        self._trigger = trigger
+
+    def service(self, handler_call_details):
+        if handler_call_details.method == _UNARY_UNARY:
+            return _MethodHandler(self._trigger, False, False)
+        elif handler_call_details.method == _UNARY_STREAM:
+            return _MethodHandler(self._trigger, False, True)
+        elif handler_call_details.method == _STREAM_UNARY:
+            return _MethodHandler(self._trigger, True, False)
+        elif handler_call_details.method == _STREAM_STREAM:
+            return _MethodHandler(self._trigger, True, True)
+        else:
+            return None
+
+
+class ResourceExhaustedTest(unittest.TestCase):
+
+    def setUp(self):
+        self._server_pool = logging_pool.pool(test_constants.THREAD_CONCURRENCY)
+        self._trigger = _TestTrigger(test_constants.THREAD_CONCURRENCY)
+        self._server = grpc.server(
+            self._server_pool,
+            handlers=(_GenericHandler(self._trigger),),
+            maximum_concurrent_rpcs=test_constants.THREAD_CONCURRENCY)
+        port = self._server.add_insecure_port('[::]:0')
+        self._server.start()
+        self._channel = grpc.insecure_channel('localhost:%d' % port)
+
+    def tearDown(self):
+        self._server.stop(0)
+
+    def testUnaryUnary(self):
+        multi_callable = self._channel.unary_unary(_UNARY_UNARY)
+        futures = []
+        for _ in range(test_constants.THREAD_CONCURRENCY):
+            futures.append(multi_callable.future(_REQUEST))
+
+        self._trigger.await_calls()
+
+        with self.assertRaises(grpc.RpcError) as exception_context:
+            multi_callable(_REQUEST)
+
+        self.assertEqual(grpc.StatusCode.RESOURCE_EXHAUSTED,
+                         exception_context.exception.code())
+
+        future_exception = multi_callable.future(_REQUEST)
+        self.assertEqual(grpc.StatusCode.RESOURCE_EXHAUSTED,
+                         future_exception.exception().code())
+
+        self._trigger.trigger()
+        for future in futures:
+            self.assertEqual(_RESPONSE, future.result())
+
+        # Ensure a new request can be handled
+        self.assertEqual(_RESPONSE, multi_callable(_REQUEST))
+
+    def testUnaryStream(self):
+        multi_callable = self._channel.unary_stream(_UNARY_STREAM)
+        calls = []
+        for _ in range(test_constants.THREAD_CONCURRENCY):
+            calls.append(multi_callable(_REQUEST))
+
+        self._trigger.await_calls()
+
+        with self.assertRaises(grpc.RpcError) as exception_context:
+            next(multi_callable(_REQUEST))
+
+        self.assertEqual(grpc.StatusCode.RESOURCE_EXHAUSTED,
+                         exception_context.exception.code())
+
+        self._trigger.trigger()
+
+        for call in calls:
+            for response in call:
+                self.assertEqual(_RESPONSE, response)
+
+        # Ensure a new request can be handled
+        new_call = multi_callable(_REQUEST)
+        for response in new_call:
+            self.assertEqual(_RESPONSE, response)
+
+    def testStreamUnary(self):
+        multi_callable = self._channel.stream_unary(_STREAM_UNARY)
+        futures = []
+        request = iter([_REQUEST] * test_constants.STREAM_LENGTH)
+        for _ in range(test_constants.THREAD_CONCURRENCY):
+            futures.append(multi_callable.future(request))
+
+        self._trigger.await_calls()
+
+        with self.assertRaises(grpc.RpcError) as exception_context:
+            multi_callable(request)
+
+        self.assertEqual(grpc.StatusCode.RESOURCE_EXHAUSTED,
+                         exception_context.exception.code())
+
+        future_exception = multi_callable.future(request)
+        self.assertEqual(grpc.StatusCode.RESOURCE_EXHAUSTED,
+                         future_exception.exception().code())
+
+        self._trigger.trigger()
+
+        for future in futures:
+            self.assertEqual(_RESPONSE, future.result())
+
+        # Ensure a new request can be handled
+        self.assertEqual(_RESPONSE, multi_callable(request))
+
+    def testStreamStream(self):
+        multi_callable = self._channel.stream_stream(_STREAM_STREAM)
+        calls = []
+        request = iter([_REQUEST] * test_constants.STREAM_LENGTH)
+        for _ in range(test_constants.THREAD_CONCURRENCY):
+            calls.append(multi_callable(request))
+
+        self._trigger.await_calls()
+
+        with self.assertRaises(grpc.RpcError) as exception_context:
+            next(multi_callable(request))
+
+        self.assertEqual(grpc.StatusCode.RESOURCE_EXHAUSTED,
+                         exception_context.exception.code())
+
+        self._trigger.trigger()
+
+        for call in calls:
+            for response in call:
+                self.assertEqual(_RESPONSE, response)
+
+        # Ensure a new request can be handled
+        new_call = multi_callable(request)
+        for response in new_call:
+            self.assertEqual(_RESPONSE, response)
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)
diff --git a/src/ruby/.rubocop.yml b/src/ruby/.rubocop.yml
index 0f61ccf..7174f3b 100644
--- a/src/ruby/.rubocop.yml
+++ b/src/ruby/.rubocop.yml
@@ -9,6 +9,7 @@
     - 'bin/math_services_pb.rb'
     - 'pb/grpc/health/v1/*'
     - 'pb/test/**/*'
+    - 'end2end/lib/*'
 
 Metrics/CyclomaticComplexity:
   Max: 9
diff --git a/src/ruby/end2end/README.md b/src/ruby/end2end/README.md
new file mode 100644
index 0000000..ea5ab6d
--- /dev/null
+++ b/src/ruby/end2end/README.md
@@ -0,0 +1,18 @@
+This directory contains some grpc-ruby end to end tests.
+
+Each test here involves two files: a "driver" and a "client". For example,
+the "channel_closing" test involves channel_closing_driver.rb
+and channel_closing_client.rb.
+
+Typically, the "driver" will start up a simple "echo" server, and then
+spawn a client. It gives the client the address of the "echo" server as
+well as an address to listen on for control rpcs. Depending on the test, the
+client usually starts up a "ClientControl" grpc server for the driver to
+interact with (the driver can tell the client process to do strange things at
+different times, depending on the test).
+
+So far these tests are mostly useful for testing process-shutdown related
+situations, since the client's run in separate processes.
+
+These tests are invoked through the "tools/run_tests/run_tests.py" script (the
+Rakefile doesn't start these).
diff --git a/src/ruby/end2end/channel_closing_client.rb b/src/ruby/end2end/channel_closing_client.rb
new file mode 100755
index 0000000..8449797
--- /dev/null
+++ b/src/ruby/end2end/channel_closing_client.rb
@@ -0,0 +1,84 @@
+#!/usr/bin/env ruby
+
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+require_relative './end2end_common'
+
+# Calls '#close' on a Channel when "shutdown" called. This tries to
+# trigger a hang or crash bug by closing a channel actively being watched
+class ChannelClosingClientController < ClientControl::ClientController::Service
+  def initialize(ch)
+    @ch = ch
+  end
+
+  def shutdown(_, _)
+    @ch.close
+    ClientControl::Void.new
+  end
+end
+
+def main
+  client_control_port = ''
+  server_port = ''
+  OptionParser.new do |opts|
+    opts.on('--client_control_port=P', String) do |p|
+      client_control_port = p
+    end
+    opts.on('--server_port=P', String) do |p|
+      server_port = p
+    end
+  end.parse!
+
+  ch = GRPC::Core::Channel.new("localhost:#{server_port}", {},
+                               :this_channel_is_insecure)
+
+  srv = GRPC::RpcServer.new
+  thd = Thread.new do
+    srv.add_http2_port("0.0.0.0:#{client_control_port}", :this_port_is_insecure)
+    srv.handle(ChannelClosingClientController.new(ch))
+    srv.run
+  end
+
+  # this should break out with an exception once the channel is closed
+  loop do
+    begin
+      state = ch.connectivity_state(true)
+      ch.watch_connectivity_state(state, Time.now + 360)
+    rescue RuntimeError => e
+      STDERR.puts "(expected) error occurred: #{e.inspect}"
+      break
+    end
+  end
+
+  srv.stop
+  thd.join
+end
+
+main
diff --git a/src/ruby/end2end/channel_closing_driver.rb b/src/ruby/end2end/channel_closing_driver.rb
new file mode 100755
index 0000000..43e2fe8
--- /dev/null
+++ b/src/ruby/end2end/channel_closing_driver.rb
@@ -0,0 +1,67 @@
+#!/usr/bin/env ruby
+
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# make sure that the client doesn't hang when channel is closed
+# explictly while it's used
+
+require_relative './end2end_common'
+
+def main
+  STDERR.puts 'start server'
+  server_runner = ServerRunner.new
+  server_port = server_runner.run
+
+  sleep 1
+
+  STDERR.puts 'start client'
+  control_stub, client_pid = start_client('channel_closing_client.rb',
+                                          server_port)
+
+  sleep 3
+
+  begin
+    Timeout.timeout(10) do
+      control_stub.shutdown(ClientControl::Void.new)
+      Process.wait(client_pid)
+    end
+  rescue Timeout::Error
+    STDERR.puts "timeout wait for client pid #{client_pid}"
+    Process.kill('SIGKILL', client_pid)
+    Process.wait(client_pid)
+    STDERR.puts 'killed client child'
+    raise 'Timed out waiting for client process. It likely hangs when a ' \
+      'channel is closed while connectivity is watched'
+  end
+
+  server_runner.stop
+end
+
+main
diff --git a/src/ruby/end2end/channel_state_client.rb b/src/ruby/end2end/channel_state_client.rb
new file mode 100755
index 0000000..08c21bb
--- /dev/null
+++ b/src/ruby/end2end/channel_state_client.rb
@@ -0,0 +1,54 @@
+#!/usr/bin/env ruby
+
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+require_relative './end2end_common'
+
+def main
+  server_port = ''
+  OptionParser.new do |opts|
+    opts.on('--client_control_port=P', String) do
+      STDERR.puts 'client_control_port ignored'
+    end
+    opts.on('--server_port=P', String) do |p|
+      server_port = p
+    end
+  end.parse!
+
+  ch = GRPC::Core::Channel.new("localhost:#{server_port}", {},
+                               :this_channel_is_insecure)
+
+  loop do
+    state = ch.connectivity_state
+    ch.watch_connectivity_state(state, Time.now + 360)
+  end
+end
+
+main
diff --git a/src/ruby/end2end/channel_state_driver.rb b/src/ruby/end2end/channel_state_driver.rb
new file mode 100755
index 0000000..c3184bf
--- /dev/null
+++ b/src/ruby/end2end/channel_state_driver.rb
@@ -0,0 +1,64 @@
+#!/usr/bin/env ruby
+
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# make sure that the client doesn't hang when process ended abruptly
+
+require_relative './end2end_common'
+
+def main
+  STDERR.puts 'start server'
+  server_runner = ServerRunner.new
+  server_port = server_runner.run
+
+  sleep 1
+
+  STDERR.puts 'start client'
+  _, client_pid = start_client('channel_state_client.rb', server_port)
+
+  sleep 3
+
+  Process.kill('SIGTERM', client_pid)
+
+  begin
+    Timeout.timeout(10) { Process.wait(client_pid) }
+  rescue Timeout::Error
+    STDERR.puts "timeout wait for client pid #{client_pid}"
+    Process.kill('SIGKILL', client_pid)
+    Process.wait(client_pid)
+    STDERR.puts 'killed client child'
+    raise 'Timed out waiting for client process. ' \
+           'It likely hangs when ended abruptly'
+  end
+
+  server_runner.stop
+end
+
+main
diff --git a/src/ruby/end2end/end2end_common.rb b/src/ruby/end2end/end2end_common.rb
new file mode 100755
index 0000000..9534bb2
--- /dev/null
+++ b/src/ruby/end2end/end2end_common.rb
@@ -0,0 +1,109 @@
+#!/usr/bin/env ruby
+
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+this_dir = File.expand_path(File.dirname(__FILE__))
+protos_lib_dir = File.join(this_dir, 'lib')
+grpc_lib_dir = File.join(File.dirname(this_dir), 'lib')
+$LOAD_PATH.unshift(grpc_lib_dir) unless $LOAD_PATH.include?(grpc_lib_dir)
+$LOAD_PATH.unshift(protos_lib_dir) unless $LOAD_PATH.include?(protos_lib_dir)
+$LOAD_PATH.unshift(this_dir) unless $LOAD_PATH.include?(this_dir)
+
+require 'grpc'
+require 'echo_services_pb'
+require 'client_control_services_pb'
+require 'socket'
+require 'optparse'
+require 'thread'
+require 'timeout'
+require 'English' # see https://github.com/bbatsov/rubocop/issues/1747
+
+# GreeterServer is simple server that implements the Helloworld Greeter server.
+class EchoServerImpl < Echo::EchoServer::Service
+  # say_hello implements the SayHello rpc method.
+  def echo(echo_req, _)
+    Echo::EchoReply.new(response: echo_req.request)
+  end
+end
+
+# ServerRunner starts an "echo server" that test clients can make calls to
+class ServerRunner
+  def initialize
+  end
+
+  def run
+    @srv = GRPC::RpcServer.new
+    port = @srv.add_http2_port('0.0.0.0:0', :this_port_is_insecure)
+    @srv.handle(EchoServerImpl)
+
+    @thd = Thread.new do
+      @srv.run
+    end
+    @srv.wait_till_running
+    port
+  end
+
+  def stop
+    @srv.stop
+    @thd.join
+    fail 'server not stopped' unless @srv.stopped?
+  end
+end
+
+def start_client(client_main, server_port)
+  this_dir = File.expand_path(File.dirname(__FILE__))
+
+  tmp_server = TCPServer.new(0)
+  client_control_port = tmp_server.local_address.ip_port
+  tmp_server.close
+
+  client_path = File.join(this_dir, client_main)
+  client_pid = Process.spawn(RbConfig.ruby,
+                             client_path,
+                             "--client_control_port=#{client_control_port}",
+                             "--server_port=#{server_port}")
+  sleep 1
+  control_stub = ClientControl::ClientController::Stub.new(
+    "localhost:#{client_control_port}", :this_channel_is_insecure)
+  [control_stub, client_pid]
+end
+
+def cleanup(control_stub, client_pid, server_runner)
+  control_stub.shutdown(ClientControl::Void.new)
+  Process.wait(client_pid)
+
+  client_exit_code = $CHILD_STATUS
+
+  if client_exit_code != 0
+    fail "term sig test failure: client exit code: #{client_exit_code}"
+  end
+
+  server_runner.stop
+end
diff --git a/src/ruby/end2end/gen_protos.sh b/src/ruby/end2end/gen_protos.sh
new file mode 100644
index 0000000..f78d9ad
--- /dev/null
+++ b/src/ruby/end2end/gen_protos.sh
@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+grpc_tools_ruby_protoc -I protos --ruby_out=lib --grpc_out=lib protos/echo.proto protos/client_control.proto
diff --git a/src/ruby/end2end/lib/client_control_pb.rb b/src/ruby/end2end/lib/client_control_pb.rb
new file mode 100644
index 0000000..1a938f1
--- /dev/null
+++ b/src/ruby/end2end/lib/client_control_pb.rb
@@ -0,0 +1,17 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: client_control.proto
+
+require 'google/protobuf'
+
+Google::Protobuf::DescriptorPool.generated_pool.build do
+  add_message "client_control.DoEchoRpcRequest" do
+    optional :request, :string, 1
+  end
+  add_message "client_control.Void" do
+  end
+end
+
+module ClientControl
+  DoEchoRpcRequest = Google::Protobuf::DescriptorPool.generated_pool.lookup("client_control.DoEchoRpcRequest").msgclass
+  Void = Google::Protobuf::DescriptorPool.generated_pool.lookup("client_control.Void").msgclass
+end
diff --git a/src/ruby/end2end/lib/client_control_services_pb.rb b/src/ruby/end2end/lib/client_control_services_pb.rb
new file mode 100644
index 0000000..04b2291
--- /dev/null
+++ b/src/ruby/end2end/lib/client_control_services_pb.rb
@@ -0,0 +1,53 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# Source: client_control.proto for package 'client_control'
+# Original file comments:
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+require 'grpc'
+require 'client_control_pb'
+
+module ClientControl
+  module ClientController
+    class Service
+
+      include GRPC::GenericService
+
+      self.marshal_class_method = :encode
+      self.unmarshal_class_method = :decode
+      self.service_name = 'client_control.ClientController'
+
+      rpc :DoEchoRpc, DoEchoRpcRequest, Void
+      rpc :Shutdown, Void, Void
+    end
+
+    Stub = Service.rpc_stub_class
+  end
+end
diff --git a/src/ruby/end2end/lib/echo_pb.rb b/src/ruby/end2end/lib/echo_pb.rb
new file mode 100644
index 0000000..c62adc0
--- /dev/null
+++ b/src/ruby/end2end/lib/echo_pb.rb
@@ -0,0 +1,18 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: echo.proto
+
+require 'google/protobuf'
+
+Google::Protobuf::DescriptorPool.generated_pool.build do
+  add_message "echo.EchoRequest" do
+    optional :request, :string, 1
+  end
+  add_message "echo.EchoReply" do
+    optional :response, :string, 1
+  end
+end
+
+module Echo
+  EchoRequest = Google::Protobuf::DescriptorPool.generated_pool.lookup("echo.EchoRequest").msgclass
+  EchoReply = Google::Protobuf::DescriptorPool.generated_pool.lookup("echo.EchoReply").msgclass
+end
diff --git a/src/ruby/end2end/lib/echo_services_pb.rb b/src/ruby/end2end/lib/echo_services_pb.rb
new file mode 100644
index 0000000..c66e975
--- /dev/null
+++ b/src/ruby/end2end/lib/echo_services_pb.rb
@@ -0,0 +1,52 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# Source: echo.proto for package 'echo'
+# Original file comments:
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+require 'grpc'
+require 'echo_pb'
+
+module Echo
+  module EchoServer
+    class Service
+
+      include GRPC::GenericService
+
+      self.marshal_class_method = :encode
+      self.unmarshal_class_method = :decode
+      self.service_name = 'echo.EchoServer'
+
+      rpc :Echo, EchoRequest, EchoReply
+    end
+
+    Stub = Service.rpc_stub_class
+  end
+end
diff --git a/src/ruby/end2end/protos/client_control.proto b/src/ruby/end2end/protos/client_control.proto
new file mode 100644
index 0000000..f985bb4
--- /dev/null
+++ b/src/ruby/end2end/protos/client_control.proto
@@ -0,0 +1,43 @@
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+package client_control;
+
+service ClientController {
+  rpc DoEchoRpc (DoEchoRpcRequest) returns (Void) {}
+  rpc Shutdown(Void) returns (Void) {}
+}
+
+message DoEchoRpcRequest {
+  string request = 1;
+}
+
+message Void{}
diff --git a/src/ruby/end2end/protos/echo.proto b/src/ruby/end2end/protos/echo.proto
new file mode 100644
index 0000000..d47afef
--- /dev/null
+++ b/src/ruby/end2end/protos/echo.proto
@@ -0,0 +1,46 @@
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+package echo;
+
+service EchoServer {
+  rpc Echo (EchoRequest) returns (EchoReply) {}
+}
+
+// The request message containing the user's name.
+message EchoRequest {
+  string request = 1;
+}
+
+// The response message containing the greetings
+message EchoReply {
+  string response = 1;
+}
diff --git a/src/ruby/end2end/sig_handling_client.rb b/src/ruby/end2end/sig_handling_client.rb
new file mode 100755
index 0000000..5b1e547
--- /dev/null
+++ b/src/ruby/end2end/sig_handling_client.rb
@@ -0,0 +1,89 @@
+#!/usr/bin/env ruby
+
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+require_relative './end2end_common'
+
+# Test client. Sends RPC's as normal but process also has signal handlers
+class SigHandlingClientController < ClientControl::ClientController::Service
+  def initialize(srv, stub)
+    @srv = srv
+    @stub = stub
+  end
+
+  def do_echo_rpc(req, _)
+    response = @stub.echo(Echo::EchoRequest.new(request: req.request))
+    fail 'bad response' unless response.response == req.request
+    ClientControl::Void.new
+  end
+
+  def shutdown(_, _)
+    Thread.new do
+      # TODO(apolcyn) There is a race between stopping the
+      # server and the "shutdown" rpc completing,
+      # See if stop method on server can end active RPC cleanly, to
+      # avoid this sleep.
+      sleep 3
+      @srv.stop
+    end
+    ClientControl::Void.new
+  end
+end
+
+def main
+  client_control_port = ''
+  server_port = ''
+  OptionParser.new do |opts|
+    opts.on('--client_control_port=P', String) do |p|
+      client_control_port = p
+    end
+    opts.on('--server_port=P', String) do |p|
+      server_port = p
+    end
+  end.parse!
+
+  Signal.trap('TERM') do
+    STDERR.puts 'SIGTERM received'
+  end
+
+  Signal.trap('INT') do
+    STDERR.puts 'SIGINT received'
+  end
+
+  srv = GRPC::RpcServer.new
+  srv.add_http2_port("0.0.0.0:#{client_control_port}",
+                     :this_port_is_insecure)
+  stub = Echo::EchoServer::Stub.new("localhost:#{server_port}",
+                                    :this_channel_is_insecure)
+  srv.handle(SigHandlingClientController.new(srv, stub))
+  srv.run
+end
+
+main
diff --git a/src/ruby/end2end/sig_handling_driver.rb b/src/ruby/end2end/sig_handling_driver.rb
new file mode 100755
index 0000000..c5d46e0
--- /dev/null
+++ b/src/ruby/end2end/sig_handling_driver.rb
@@ -0,0 +1,61 @@
+#!/usr/bin/env ruby
+
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# smoke test for a grpc-using app that receives and
+# handles process-ending signals
+
+require_relative './end2end_common'
+
+def main
+  STDERR.puts 'start server'
+  server_runner = ServerRunner.new
+  server_port = server_runner.run
+
+  sleep 1
+
+  STDERR.puts 'start client'
+  control_stub, client_pid = start_client('sig_handling_client.rb', server_port)
+
+  sleep 1
+
+  count = 0
+  while count < 5
+    control_stub.do_echo_rpc(
+      ClientControl::DoEchoRpcRequest.new(request: 'hello'))
+    Process.kill('SIGTERM', client_pid)
+    Process.kill('SIGINT', client_pid)
+    count += 1
+  end
+
+  cleanup(control_stub, client_pid, server_runner)
+end
+
+main
diff --git a/src/ruby/end2end/sig_int_during_channel_watch_client.rb b/src/ruby/end2end/sig_int_during_channel_watch_client.rb
new file mode 100755
index 0000000..389fc5b
--- /dev/null
+++ b/src/ruby/end2end/sig_int_during_channel_watch_client.rb
@@ -0,0 +1,70 @@
+#!/usr/bin/env ruby
+
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+require_relative './end2end_common'
+
+# Start polling the channel state in both the main thread
+# and a child thread. Try to get the driver to send process-ending
+# interrupt while both a child thread and the main thread are in the
+# middle of a blocking connectivity_state call.
+def main
+  server_port = ''
+  OptionParser.new do |opts|
+    opts.on('--client_control_port=P', String) do
+      STDERR.puts 'client_control_port not used'
+    end
+    opts.on('--server_port=P', String) do |p|
+      server_port = p
+    end
+  end.parse!
+
+  thd = Thread.new do
+    child_thread_channel = GRPC::Core::Channel.new("localhost:#{server_port}",
+                                                   {},
+                                                   :this_channel_is_insecure)
+    loop do
+      state = child_thread_channel.connectivity_state(false)
+      child_thread_channel.watch_connectivity_state(state, Time.now + 360)
+    end
+  end
+
+  main_channel = GRPC::Core::Channel.new("localhost:#{server_port}",
+                                         {},
+                                         :this_channel_is_insecure)
+  loop do
+    state = main_channel.connectivity_state(false)
+    main_channel.watch_connectivity_state(state, Time.now + 360)
+  end
+
+  thd.join
+end
+
+main
diff --git a/src/ruby/end2end/sig_int_during_channel_watch_driver.rb b/src/ruby/end2end/sig_int_during_channel_watch_driver.rb
new file mode 100755
index 0000000..84d039b
--- /dev/null
+++ b/src/ruby/end2end/sig_int_during_channel_watch_driver.rb
@@ -0,0 +1,69 @@
+#!/usr/bin/env ruby
+
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# abruptly end a process that has active calls to
+# Channel.watch_connectivity_state
+
+require_relative './end2end_common'
+
+def main
+  STDERR.puts 'start server'
+  server_runner = ServerRunner.new
+  server_port = server_runner.run
+
+  sleep 1
+
+  STDERR.puts 'start client'
+  _, client_pid = start_client('sig_int_during_channel_watch_client.rb',
+                               server_port)
+
+  # give time for the client to get into the middle
+  # of a channel state watch call
+  sleep 1
+  Process.kill('SIGINT', client_pid)
+
+  begin
+    Timeout.timeout(10) do
+      Process.wait(client_pid)
+    end
+  rescue Timeout::Error
+    STDERR.puts "timeout wait for client pid #{client_pid}"
+    Process.kill('SIGKILL', client_pid)
+    Process.wait(client_pid)
+    STDERR.puts 'killed client child'
+    raise 'Timed out waiting for client process. It likely hangs when a ' \
+      'SIGINT is sent while there is an active connectivity_state call'
+  end
+
+  server_runner.stop
+end
+
+main
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index ecb6623..7067933 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -71,6 +71,7 @@
 
 ENV['EMBED_OPENSSL'] = 'true'
 ENV['EMBED_ZLIB'] = 'true'
+ENV['EMBED_CARES'] = 'true'
 ENV['ARCH_FLAGS'] = RbConfig::CONFIG['ARCH_FLAG']
 ENV['ARCH_FLAGS'] = '-arch i386 -arch x86_64' if RUBY_PLATFORM =~ /darwin/
 ENV['CFLAGS'] = '-DGPR_BACKWARDS_COMPATIBILITY_MODE'
diff --git a/src/ruby/ext/grpc/rb_channel.c b/src/ruby/ext/grpc/rb_channel.c
index 84e43d3..1c20c88 100644
--- a/src/ruby/ext/grpc/rb_channel.c
+++ b/src/ruby/ext/grpc/rb_channel.c
@@ -32,21 +32,22 @@
  */
 
 #include <ruby/ruby.h>
+#include <ruby/thread.h>
 
 #include "rb_grpc_imports.generated.h"
-#include "rb_channel.h"
 #include "rb_byte_buffer.h"
+#include "rb_channel.h"
 
 #include <grpc/grpc.h>
 #include <grpc/grpc_security.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/time.h>
-#include "rb_grpc.h"
 #include "rb_call.h"
 #include "rb_channel_args.h"
 #include "rb_channel_credentials.h"
 #include "rb_completion_queue.h"
+#include "rb_grpc.h"
 #include "rb_server.h"
 
 /* id_channel is the name of the hidden ivar that preserves a reference to the
@@ -73,9 +74,26 @@
 
   /* The actual channel */
   grpc_channel *wrapped;
-  grpc_completion_queue *queue;
+  int request_safe_destroy;
+  int safe_to_destroy;
+  grpc_connectivity_state current_connectivity_state;
+
+  int mu_init_done;
+  int abort_watch_connectivity_state;
+  gpr_mu channel_mu;
+  gpr_cv channel_cv;
 } grpc_rb_channel;
 
+/* Forward declarations of functions involved in temporary fix to
+ * https://github.com/grpc/grpc/issues/9941 */
+static void grpc_rb_channel_try_register_connection_polling(
+    grpc_rb_channel *wrapper);
+static void grpc_rb_channel_safe_destroy(grpc_rb_channel *wrapper);
+
+static grpc_completion_queue *channel_polling_cq;
+static gpr_mu global_connection_polling_mu;
+static int abort_channel_polling = 0;
+
 /* Destroys Channel instances. */
 static void grpc_rb_channel_free(void *p) {
   grpc_rb_channel *ch = NULL;
@@ -85,8 +103,13 @@
   ch = (grpc_rb_channel *)p;
 
   if (ch->wrapped != NULL) {
-    grpc_channel_destroy(ch->wrapped);
-    grpc_rb_completion_queue_destroy(ch->queue);
+    grpc_rb_channel_safe_destroy(ch);
+    ch->wrapped = NULL;
+  }
+
+  if (ch->mu_init_done) {
+    gpr_mu_destroy(&ch->channel_mu);
+    gpr_cv_destroy(&ch->channel_cv);
   }
 
   xfree(p);
@@ -104,13 +127,15 @@
   }
 }
 
-static rb_data_type_t grpc_channel_data_type = {
-    "grpc_channel",
-    {grpc_rb_channel_mark, grpc_rb_channel_free, GRPC_RB_MEMSIZE_UNAVAILABLE,
-     {NULL, NULL}},
-    NULL, NULL,
+static rb_data_type_t grpc_channel_data_type = {"grpc_channel",
+                                                {grpc_rb_channel_mark,
+                                                 grpc_rb_channel_free,
+                                                 GRPC_RB_MEMSIZE_UNAVAILABLE,
+                                                 {NULL, NULL}},
+                                                NULL,
+                                                NULL,
 #ifdef RUBY_TYPED_FREE_IMMEDIATELY
-    RUBY_TYPED_FREE_IMMEDIATELY
+                                                RUBY_TYPED_FREE_IMMEDIATELY
 #endif
 };
 
@@ -145,6 +170,7 @@
   rb_scan_args(argc, argv, "3", &target, &channel_args, &credentials);
 
   TypedData_Get_Struct(self, grpc_rb_channel, &grpc_channel_data_type, wrapper);
+  wrapper->mu_init_done = 0;
   target_chars = StringValueCStr(target);
   grpc_rb_hash_convert_to_channel_args(channel_args, &args);
   if (TYPE(credentials) == T_SYMBOL) {
@@ -159,6 +185,27 @@
     creds = grpc_rb_get_wrapped_channel_credentials(credentials);
     ch = grpc_secure_channel_create(creds, target_chars, &args, NULL);
   }
+
+  GPR_ASSERT(ch);
+
+  wrapper->wrapped = ch;
+
+  gpr_mu_init(&wrapper->channel_mu);
+  gpr_cv_init(&wrapper->channel_cv);
+  wrapper->mu_init_done = 1;
+
+  gpr_mu_lock(&wrapper->channel_mu);
+  wrapper->abort_watch_connectivity_state = 0;
+  wrapper->current_connectivity_state = grpc_channel_check_connectivity_state(wrapper->wrapped, 0);
+  wrapper->safe_to_destroy = 0;
+  wrapper->request_safe_destroy = 0;
+
+  gpr_cv_broadcast(&wrapper->channel_cv);
+  gpr_mu_unlock(&wrapper->channel_mu);
+
+
+  grpc_rb_channel_try_register_connection_polling(wrapper);
+
   if (args.args != NULL) {
     xfree(args.args); /* Allocated by grpc_rb_hash_convert_to_channel_args */
   }
@@ -169,25 +216,28 @@
   }
   rb_ivar_set(self, id_target, target);
   wrapper->wrapped = ch;
-  wrapper->queue = grpc_completion_queue_create(NULL);
   return self;
 }
 
 /*
   call-seq:
-    insecure_channel = Channel:new("myhost:8080", {'arg1': 'value1'})
-    creds = ...
-    secure_channel = Channel:new("myhost:443", {'arg1': 'value1'}, creds)
+    ch.connectivity_state       -> state
+    ch.connectivity_state(true) -> state
 
-  Creates channel instances. */
+  Indicates the current state of the channel, whose value is one of the
+  constants defined in GRPC::Core::ConnectivityStates.
+
+  It also tries to connect if the chennel is idle in the second form. */
 static VALUE grpc_rb_channel_get_connectivity_state(int argc, VALUE *argv,
                                                     VALUE self) {
-  VALUE try_to_connect = Qfalse;
+  VALUE try_to_connect_param = Qfalse;
+  int grpc_try_to_connect = 0;
   grpc_rb_channel *wrapper = NULL;
   grpc_channel *ch = NULL;
 
   /* "01" == 0 mandatory args, 1 (try_to_connect) is optional */
-  rb_scan_args(argc, argv, "01", try_to_connect);
+  rb_scan_args(argc, argv, "01", &try_to_connect_param);
+  grpc_try_to_connect = RTEST(try_to_connect_param) ? 1 : 0;
 
   TypedData_Get_Struct(self, grpc_rb_channel, &grpc_channel_data_type, wrapper);
   ch = wrapper->wrapped;
@@ -195,57 +245,88 @@
     rb_raise(rb_eRuntimeError, "closed!");
     return Qnil;
   }
-  return NUM2LONG(
-      grpc_channel_check_connectivity_state(ch, (int)try_to_connect));
+  return LONG2NUM(grpc_channel_check_connectivity_state(wrapper->wrapped, grpc_try_to_connect));
 }
 
-/* Watch for a change in connectivity state.
+typedef struct watch_state_stack {
+  grpc_rb_channel *wrapper;
+  gpr_timespec deadline;
+  int last_state;
+} watch_state_stack;
 
-   Once the channel connectivity state is different from the last observed
-   state, tag will be enqueued on cq with success=1
+static void *watch_channel_state_without_gvl(void *arg) {
+  watch_state_stack *stack = (watch_state_stack*)arg;
+  gpr_timespec deadline = stack->deadline;
+  grpc_rb_channel *wrapper = stack->wrapper;
+  int last_state = stack->last_state;
+  void *return_value = (void*)0;
 
-   If deadline expires BEFORE the state is changed, tag will be enqueued on
-   the completion queue with success=0 */
+  gpr_mu_lock(&wrapper->channel_mu);
+  while(wrapper->current_connectivity_state == last_state &&
+        !wrapper->request_safe_destroy &&
+        !wrapper->safe_to_destroy &&
+        !wrapper->abort_watch_connectivity_state &&
+        gpr_time_cmp(deadline, gpr_now(GPR_CLOCK_REALTIME)) > 0) {
+    gpr_cv_wait(&wrapper->channel_cv, &wrapper->channel_mu, deadline);
+  }
+  if (wrapper->current_connectivity_state != last_state) {
+    return_value = (void*)1;
+  }
+  gpr_mu_unlock(&wrapper->channel_mu);
+
+  return return_value;
+}
+
+static void watch_channel_state_unblocking_func(void *arg) {
+  grpc_rb_channel *wrapper = (grpc_rb_channel*)arg;
+  gpr_log(GPR_DEBUG, "GRPC_RUBY: watch channel state unblocking func called");
+  gpr_mu_lock(&wrapper->channel_mu);
+  wrapper->abort_watch_connectivity_state = 1;
+  gpr_cv_broadcast(&wrapper->channel_cv);
+  gpr_mu_unlock(&wrapper->channel_mu);
+}
+
+/* Wait until the channel's connectivity state becomes different from
+ * "last_state", or "deadline" expires.
+ * Returns true if the the channel's connectivity state becomes
+ * different from "last_state" within "deadline".
+ * Returns false if "deadline" expires before the channel's connectivity
+ * state changes from "last_state".
+ * */
 static VALUE grpc_rb_channel_watch_connectivity_state(VALUE self,
                                                       VALUE last_state,
                                                       VALUE deadline) {
   grpc_rb_channel *wrapper = NULL;
-  grpc_channel *ch = NULL;
-  grpc_completion_queue *cq = NULL;
-
-  void *tag = wrapper;
-
-  grpc_event event;
+  watch_state_stack stack;
+  void* out;
 
   TypedData_Get_Struct(self, grpc_rb_channel, &grpc_channel_data_type, wrapper);
-  ch = wrapper->wrapped;
-  cq = wrapper->queue;
-  if (ch == NULL) {
+
+  if (wrapper->wrapped == NULL) {
     rb_raise(rb_eRuntimeError, "closed!");
     return Qnil;
   }
-  grpc_channel_watch_connectivity_state(
-      ch,
-      (grpc_connectivity_state)NUM2LONG(last_state),
-      grpc_rb_time_timeval(deadline, /* absolute time */ 0),
-      cq,
-      tag);
 
-  event = rb_completion_queue_pluck(cq, tag,
-                                    gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
-
-  if (event.success) {
-    return Qtrue;
-  } else {
-    return Qfalse;
+  if (!FIXNUM_P(last_state)) {
+    rb_raise(rb_eTypeError, "bad type for last_state. want a GRPC::Core::ChannelState constant");
+    return Qnil;
   }
+
+  stack.wrapper = wrapper;
+  stack.deadline = grpc_rb_time_timeval(deadline, 0);
+  stack.last_state = NUM2LONG(last_state);
+  out = rb_thread_call_without_gvl(watch_channel_state_without_gvl, &stack, watch_channel_state_unblocking_func, wrapper);
+  if (out) {
+    return Qtrue;
+  }
+  return Qfalse;
 }
 
 /* Create a call given a grpc_channel, in order to call method. The request
    is not sent until grpc_call_invoke is called. */
-static VALUE grpc_rb_channel_create_call(VALUE self, VALUE parent,
-                                         VALUE mask, VALUE method,
-                                         VALUE host, VALUE deadline) {
+static VALUE grpc_rb_channel_create_call(VALUE self, VALUE parent, VALUE mask,
+                                         VALUE method, VALUE host,
+                                         VALUE deadline) {
   VALUE res = Qnil;
   grpc_rb_channel *wrapper = NULL;
   grpc_call *call = NULL;
@@ -256,10 +337,11 @@
   grpc_slice method_slice;
   grpc_slice host_slice;
   grpc_slice *host_slice_ptr = NULL;
-  char* tmp_str = NULL;
+  char *tmp_str = NULL;
 
   if (host != Qnil) {
-    host_slice = grpc_slice_from_copied_buffer(RSTRING_PTR(host), RSTRING_LEN(host));
+    host_slice =
+        grpc_slice_from_copied_buffer(RSTRING_PTR(host), RSTRING_LEN(host));
     host_slice_ptr = &host_slice;
   }
   if (mask != Qnil) {
@@ -277,17 +359,18 @@
     return Qnil;
   }
 
-  method_slice = grpc_slice_from_copied_buffer(RSTRING_PTR(method), RSTRING_LEN(method));
+  method_slice =
+      grpc_slice_from_copied_buffer(RSTRING_PTR(method), RSTRING_LEN(method));
 
   call = grpc_channel_create_call(ch, parent_call, flags, cq, method_slice,
-                                  host_slice_ptr, grpc_rb_time_timeval(
-                                      deadline,
-                                      /* absolute time */ 0), NULL);
+                                  host_slice_ptr,
+                                  grpc_rb_time_timeval(deadline,
+                                                       /* absolute time */ 0),
+                                  NULL);
 
   if (call == NULL) {
     tmp_str = grpc_slice_to_c_string(method_slice);
-    rb_raise(rb_eRuntimeError, "cannot create call with method %s",
-             tmp_str);
+    rb_raise(rb_eRuntimeError, "cannot create call with method %s", tmp_str);
     return Qnil;
   }
 
@@ -304,7 +387,6 @@
   return res;
 }
 
-
 /* Closes the channel, calling it's destroy method */
 static VALUE grpc_rb_channel_destroy(VALUE self) {
   grpc_rb_channel *wrapper = NULL;
@@ -313,19 +395,18 @@
   TypedData_Get_Struct(self, grpc_rb_channel, &grpc_channel_data_type, wrapper);
   ch = wrapper->wrapped;
   if (ch != NULL) {
-    grpc_channel_destroy(ch);
+    grpc_rb_channel_safe_destroy(wrapper);
     wrapper->wrapped = NULL;
   }
 
   return Qnil;
 }
 
-
 /* Called to obtain the target that this channel accesses. */
 static VALUE grpc_rb_channel_get_target(VALUE self) {
   grpc_rb_channel *wrapper = NULL;
   VALUE res = Qnil;
-  char* target = NULL;
+  char *target = NULL;
 
   TypedData_Get_Struct(self, grpc_rb_channel, &grpc_channel_data_type, wrapper);
   target = grpc_channel_get_target(wrapper->wrapped);
@@ -335,10 +416,122 @@
   return res;
 }
 
+// Either start polling channel connection state or signal that it's free to
+// destroy.
+// Not safe to call while a channel's connection state is polled.
+static void grpc_rb_channel_try_register_connection_polling(
+  grpc_rb_channel *wrapper) {
+  grpc_connectivity_state conn_state;
+  gpr_timespec sleep_time = gpr_time_add(
+      gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_millis(20, GPR_TIMESPAN));
+
+  GPR_ASSERT(wrapper);
+  GPR_ASSERT(wrapper->wrapped);
+  gpr_mu_lock(&wrapper->channel_mu);
+  if (wrapper->request_safe_destroy) {
+    wrapper->safe_to_destroy = 1;
+    gpr_cv_broadcast(&wrapper->channel_cv);
+    gpr_mu_unlock(&wrapper->channel_mu);
+    return;
+  }
+  gpr_mu_lock(&global_connection_polling_mu);
+
+  conn_state = grpc_channel_check_connectivity_state(wrapper->wrapped, 0);
+  if (conn_state != wrapper->current_connectivity_state) {
+    wrapper->current_connectivity_state = conn_state;
+    gpr_cv_broadcast(&wrapper->channel_cv);
+  }
+  // avoid posting work to the channel polling cq if it's been shutdown
+  if (!abort_channel_polling && conn_state != GRPC_CHANNEL_SHUTDOWN) {
+    grpc_channel_watch_connectivity_state(
+        wrapper->wrapped, conn_state, sleep_time, channel_polling_cq, wrapper);
+  } else {
+    wrapper->safe_to_destroy = 1;
+    gpr_cv_broadcast(&wrapper->channel_cv);
+  }
+  gpr_mu_unlock(&global_connection_polling_mu);
+  gpr_mu_unlock(&wrapper->channel_mu);
+}
+
+// Note requires wrapper->wrapped, wrapper->channel_mu/cv initialized
+static void grpc_rb_channel_safe_destroy(grpc_rb_channel *wrapper) {
+  gpr_mu_lock(&wrapper->channel_mu);
+  wrapper->request_safe_destroy = 1;
+
+  while (!wrapper->safe_to_destroy) {
+    gpr_cv_wait(&wrapper->channel_cv, &wrapper->channel_mu,
+                gpr_inf_future(GPR_CLOCK_REALTIME));
+  }
+  GPR_ASSERT(wrapper->safe_to_destroy);
+  gpr_mu_unlock(&wrapper->channel_mu);
+
+  grpc_channel_destroy(wrapper->wrapped);
+}
+
+// Note this loop breaks out with a single call of
+// "grpc_rb_event_unblocking_func".
+// This assumes that a ruby call the unblocking func
+// indicates process shutdown.
+// In the worst case, this stops polling channel connectivity
+// early and falls back to current behavior.
+static void *run_poll_channels_loop_no_gil(void *arg) {
+  grpc_event event;
+  (void)arg;
+  for (;;) {
+    event = grpc_completion_queue_next(
+        channel_polling_cq, gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+    if (event.type == GRPC_QUEUE_SHUTDOWN) {
+      break;
+    }
+    if (event.type == GRPC_OP_COMPLETE) {
+      grpc_rb_channel_try_register_connection_polling((grpc_rb_channel *)event.tag);
+    }
+  }
+  grpc_completion_queue_destroy(channel_polling_cq);
+  gpr_log(GPR_DEBUG, "GRPC_RUBY: run_poll_channels_loop_no_gil - exit connection polling loop");
+  return NULL;
+}
+
+// Notify the channel polling loop to cleanup and shutdown.
+static void grpc_rb_event_unblocking_func(void *arg) {
+  (void)arg;
+  gpr_mu_lock(&global_connection_polling_mu);
+  gpr_log(GPR_DEBUG, "GRPC_RUBY: grpc_rb_event_unblocking_func - begin aborting connection polling");
+  abort_channel_polling = 1;
+  grpc_completion_queue_shutdown(channel_polling_cq);
+  gpr_mu_unlock(&global_connection_polling_mu);
+}
+
+// Poll channel connectivity states in background thread without the GIL.
+static VALUE run_poll_channels_loop(VALUE arg) {
+  (void)arg;
+  gpr_log(GPR_DEBUG, "GRPC_RUBY: run_poll_channels_loop - create connection polling thread");
+  rb_thread_call_without_gvl(run_poll_channels_loop_no_gil, NULL,
+                             grpc_rb_event_unblocking_func, NULL);
+  return Qnil;
+}
+
+/* Temporary fix for
+ * https://github.com/GoogleCloudPlatform/google-cloud-ruby/issues/899.
+ * Transports in idle channels can get destroyed. Normally c-core re-connects,
+ * but in grpc-ruby core never gets a thread until an RPC is made, because ruby
+ * only calls c-core's "completion_queu_pluck" API.
+ * This uses a global background thread that calls
+ * "completion_queue_next" on registered "watch_channel_connectivity_state"
+ * calls - so that c-core can reconnect if needed, when there aren't any RPC's.
+ * TODO(apolcyn) remove this when core handles new RPCs on dead connections.
+ */
+static void start_poll_channels_loop() {
+  channel_polling_cq = grpc_completion_queue_create(NULL);
+  gpr_mu_init(&global_connection_polling_mu);
+  abort_channel_polling = 0;
+  rb_thread_create(run_poll_channels_loop, NULL);
+}
+
 static void Init_grpc_propagate_masks() {
   /* Constants representing call propagation masks in grpc.h */
-  VALUE grpc_rb_mPropagateMasks = rb_define_module_under(
-      grpc_rb_mGrpcCore, "PropagateMasks");
+  VALUE grpc_rb_mPropagateMasks =
+      rb_define_module_under(grpc_rb_mGrpcCore, "PropagateMasks");
   rb_define_const(grpc_rb_mPropagateMasks, "DEADLINE",
                   UINT2NUM(GRPC_PROPAGATE_DEADLINE));
   rb_define_const(grpc_rb_mPropagateMasks, "CENSUS_STATS_CONTEXT",
@@ -353,8 +546,8 @@
 
 static void Init_grpc_connectivity_states() {
   /* Constants representing call propagation masks in grpc.h */
-  VALUE grpc_rb_mConnectivityStates = rb_define_module_under(
-      grpc_rb_mGrpcCore, "ConnectivityStates");
+  VALUE grpc_rb_mConnectivityStates =
+      rb_define_module_under(grpc_rb_mGrpcCore, "ConnectivityStates");
   rb_define_const(grpc_rb_mConnectivityStates, "IDLE",
                   LONG2NUM(GRPC_CHANNEL_IDLE));
   rb_define_const(grpc_rb_mConnectivityStates, "CONNECTING",
@@ -382,12 +575,11 @@
 
   /* Add ruby analogues of the Channel methods. */
   rb_define_method(grpc_rb_cChannel, "connectivity_state",
-                   grpc_rb_channel_get_connectivity_state,
-                   -1);
+                   grpc_rb_channel_get_connectivity_state, -1);
   rb_define_method(grpc_rb_cChannel, "watch_connectivity_state",
-                   grpc_rb_channel_watch_connectivity_state, 4);
-  rb_define_method(grpc_rb_cChannel, "create_call",
-                   grpc_rb_channel_create_call, 5);
+                   grpc_rb_channel_watch_connectivity_state, 2);
+  rb_define_method(grpc_rb_cChannel, "create_call", grpc_rb_channel_create_call,
+                   5);
   rb_define_method(grpc_rb_cChannel, "target", grpc_rb_channel_get_target, 0);
   rb_define_method(grpc_rb_cChannel, "destroy", grpc_rb_channel_destroy, 0);
   rb_define_alias(grpc_rb_cChannel, "close", "destroy");
@@ -405,6 +597,7 @@
   id_insecure_channel = rb_intern("this_channel_is_insecure");
   Init_grpc_propagate_masks();
   Init_grpc_connectivity_states();
+  start_poll_channels_loop();
 }
 
 /* Gets the wrapped channel from the ruby wrapper */
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.c b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
index 3ef6f0e..063f921 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.c
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
@@ -91,6 +91,9 @@
 grpc_shutdown_type grpc_shutdown_import;
 grpc_version_string_type grpc_version_string_import;
 grpc_g_stands_for_type grpc_g_stands_for_import;
+grpc_completion_queue_factory_lookup_type grpc_completion_queue_factory_lookup_import;
+grpc_completion_queue_create_for_next_type grpc_completion_queue_create_for_next_import;
+grpc_completion_queue_create_for_pluck_type grpc_completion_queue_create_for_pluck_import;
 grpc_completion_queue_create_type grpc_completion_queue_create_import;
 grpc_completion_queue_next_type grpc_completion_queue_next_import;
 grpc_completion_queue_pluck_type grpc_completion_queue_pluck_import;
@@ -385,6 +388,9 @@
   grpc_shutdown_import = (grpc_shutdown_type) GetProcAddress(library, "grpc_shutdown");
   grpc_version_string_import = (grpc_version_string_type) GetProcAddress(library, "grpc_version_string");
   grpc_g_stands_for_import = (grpc_g_stands_for_type) GetProcAddress(library, "grpc_g_stands_for");
+  grpc_completion_queue_factory_lookup_import = (grpc_completion_queue_factory_lookup_type) GetProcAddress(library, "grpc_completion_queue_factory_lookup");
+  grpc_completion_queue_create_for_next_import = (grpc_completion_queue_create_for_next_type) GetProcAddress(library, "grpc_completion_queue_create_for_next");
+  grpc_completion_queue_create_for_pluck_import = (grpc_completion_queue_create_for_pluck_type) GetProcAddress(library, "grpc_completion_queue_create_for_pluck");
   grpc_completion_queue_create_import = (grpc_completion_queue_create_type) GetProcAddress(library, "grpc_completion_queue_create");
   grpc_completion_queue_next_import = (grpc_completion_queue_next_type) GetProcAddress(library, "grpc_completion_queue_next");
   grpc_completion_queue_pluck_import = (grpc_completion_queue_pluck_type) GetProcAddress(library, "grpc_completion_queue_pluck");
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index ef9845d..f5dcd68 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -224,6 +224,15 @@
 typedef const char *(*grpc_g_stands_for_type)(void);
 extern grpc_g_stands_for_type grpc_g_stands_for_import;
 #define grpc_g_stands_for grpc_g_stands_for_import
+typedef const grpc_completion_queue_factory *(*grpc_completion_queue_factory_lookup_type)(const grpc_completion_queue_attributes *attributes);
+extern grpc_completion_queue_factory_lookup_type grpc_completion_queue_factory_lookup_import;
+#define grpc_completion_queue_factory_lookup grpc_completion_queue_factory_lookup_import
+typedef grpc_completion_queue *(*grpc_completion_queue_create_for_next_type)(void *reserved);
+extern grpc_completion_queue_create_for_next_type grpc_completion_queue_create_for_next_import;
+#define grpc_completion_queue_create_for_next grpc_completion_queue_create_for_next_import
+typedef grpc_completion_queue *(*grpc_completion_queue_create_for_pluck_type)(void *reserved);
+extern grpc_completion_queue_create_for_pluck_type grpc_completion_queue_create_for_pluck_import;
+#define grpc_completion_queue_create_for_pluck grpc_completion_queue_create_for_pluck_import
 typedef grpc_completion_queue *(*grpc_completion_queue_create_type)(void *reserved);
 extern grpc_completion_queue_create_type grpc_completion_queue_create_import;
 #define grpc_completion_queue_create grpc_completion_queue_create_import
diff --git a/src/ruby/spec/channel_connection_spec.rb b/src/ruby/spec/channel_connection_spec.rb
new file mode 100644
index 0000000..940d68b
--- /dev/null
+++ b/src/ruby/spec/channel_connection_spec.rb
@@ -0,0 +1,141 @@
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+require 'grpc'
+
+# A test message
+class EchoMsg
+  def self.marshal(_o)
+    ''
+  end
+
+  def self.unmarshal(_o)
+    EchoMsg.new
+  end
+end
+
+# A test service with an echo implementation.
+class EchoService
+  include GRPC::GenericService
+  rpc :an_rpc, EchoMsg, EchoMsg
+  attr_reader :received_md
+
+  def initialize(**kw)
+    @trailing_metadata = kw
+    @received_md = []
+  end
+
+  def an_rpc(req, call)
+    GRPC.logger.info('echo service received a request')
+    call.output_metadata.update(@trailing_metadata)
+    @received_md << call.metadata unless call.metadata.nil?
+    req
+  end
+end
+
+EchoStub = EchoService.rpc_stub_class
+
+def start_server(port = 0)
+  @srv = GRPC::RpcServer.new
+  server_port = @srv.add_http2_port("localhost:#{port}", :this_port_is_insecure)
+  @srv.handle(EchoService)
+  @server_thd = Thread.new { @srv.run }
+  @srv.wait_till_running
+  server_port
+end
+
+def stop_server
+  expect(@srv.stopped?).to be(false)
+  @srv.stop
+  @server_thd.join
+  expect(@srv.stopped?).to be(true)
+end
+
+describe 'channel connection behavior' do
+  it 'the client channel handles temporary loss of a transport' do
+    port = start_server
+    stub = EchoStub.new("localhost:#{port}", :this_channel_is_insecure)
+    req = EchoMsg.new
+    expect(stub.an_rpc(req)).to be_a(EchoMsg)
+    stop_server
+    sleep 1
+    # TODO(apolcyn) grabbing the same port might fail, is this stable enough?
+    start_server(port)
+    expect(stub.an_rpc(req)).to be_a(EchoMsg)
+    stop_server
+  end
+
+  it 'observably connects and reconnects to transient server' \
+    ' when using the channel state API' do
+    port = start_server
+    ch = GRPC::Core::Channel.new("localhost:#{port}", {},
+                                 :this_channel_is_insecure)
+
+    expect(ch.connectivity_state).to be(GRPC::Core::ConnectivityStates::IDLE)
+
+    state = ch.connectivity_state(true)
+
+    count = 0
+    while count < 20 && state != GRPC::Core::ConnectivityStates::READY
+      ch.watch_connectivity_state(state, Time.now + 60)
+      state = ch.connectivity_state(true)
+      count += 1
+    end
+
+    expect(state).to be(GRPC::Core::ConnectivityStates::READY)
+
+    stop_server
+
+    state = ch.connectivity_state
+
+    count = 0
+    while count < 20 && state == GRPC::Core::ConnectivityStates::READY
+      ch.watch_connectivity_state(state, Time.now + 60)
+      state = ch.connectivity_state
+      count += 1
+    end
+
+    expect(state).to_not be(GRPC::Core::ConnectivityStates::READY)
+
+    start_server(port)
+
+    state = ch.connectivity_state(true)
+
+    count = 0
+    while count < 20 && state != GRPC::Core::ConnectivityStates::READY
+      ch.watch_connectivity_state(state, Time.now + 60)
+      state = ch.connectivity_state(true)
+      count += 1
+    end
+
+    expect(state).to be(GRPC::Core::ConnectivityStates::READY)
+
+    stop_server
+  end
+end
diff --git a/src/ruby/spec/channel_spec.rb b/src/ruby/spec/channel_spec.rb
index 740eac6..a289a00 100644
--- a/src/ruby/spec/channel_spec.rb
+++ b/src/ruby/spec/channel_spec.rb
@@ -153,6 +153,35 @@
     end
   end
 
+  describe '#connectivity_state' do
+    it 'returns an enum' do
+      ch = GRPC::Core::Channel.new(fake_host, nil, :this_channel_is_insecure)
+      valid_states = [
+        GRPC::Core::ConnectivityStates::IDLE,
+        GRPC::Core::ConnectivityStates::CONNECTING,
+        GRPC::Core::ConnectivityStates::READY,
+        GRPC::Core::ConnectivityStates::TRANSIENT_FAILURE,
+        GRPC::Core::ConnectivityStates::FATAL_FAILURE
+      ]
+
+      expect(valid_states).to include(ch.connectivity_state)
+    end
+
+    it 'returns an enum when trying to connect' do
+      ch = GRPC::Core::Channel.new(fake_host, nil, :this_channel_is_insecure)
+      ch.connectivity_state(true)
+      valid_states = [
+        GRPC::Core::ConnectivityStates::IDLE,
+        GRPC::Core::ConnectivityStates::CONNECTING,
+        GRPC::Core::ConnectivityStates::READY,
+        GRPC::Core::ConnectivityStates::TRANSIENT_FAILURE,
+        GRPC::Core::ConnectivityStates::FATAL_FAILURE
+      ]
+
+      expect(valid_states).to include(ch.connectivity_state)
+    end
+  end
+
   describe '::SSL_TARGET' do
     it 'is a symbol' do
       expect(GRPC::Core::Channel::SSL_TARGET).to be_a(Symbol)
diff --git a/templates/CMakeLists.txt.template b/templates/CMakeLists.txt.template
index 1c2ef0a..e2fc216 100644
--- a/templates/CMakeLists.txt.template
+++ b/templates/CMakeLists.txt.template
@@ -40,17 +40,17 @@
   # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
   <%!
-  
+
   import re
-  
+
   proto_re = re.compile('(.*)\\.proto')
-  
+
   def proto_replace_ext(filename, ext):
       m = proto_re.match(filename)
       if not m:
         return filename
       return '${_gRPC_PROTO_GENS_DIR}/' + m.group(1) + ext
-  
+
   def get_deps(target_dict):
     deps = []
     if target_dict.get('baselib', False):
@@ -63,19 +63,20 @@
       deps.append("${_gRPC_PROTOBUF_LIBRARIES}")
     if target_dict['name'] in ['grpc']:
       deps.append("${_gRPC_ZLIB_LIBRARIES}")
+      deps.append("${_gRPC_CARES_LIBRARIES}")
     deps.append("${_gRPC_ALLTARGETS_LIBRARIES}")
     for d in target_dict.get('deps', []):
       deps.append(d)
     if target_dict.build == 'test' and target_dict.language == 'c++':
       deps.append("${_gRPC_GFLAGS_LIBRARIES}")
     return deps
-  
+
   def get_platforms_condition_begin(platforms):
     if all(platform in platforms for platform in ['linux', 'mac', 'posix', 'windows']):
       return ''
     cond = ' OR '.join(['_gRPC_PLATFORM_%s' % platform.upper() for platform in platforms])
     return 'if(%s)\n' % cond
-  
+
   def get_platforms_condition_end(platforms):
     if not get_platforms_condition_begin(platforms):
       return ''
@@ -90,7 +91,7 @@
   set(PACKAGE_TARNAME   "<%text>${PACKAGE_NAME}-${PACKAGE_VERSION}</%text>")
   set(PACKAGE_BUGREPORT "https://github.com/grpc/grpc/issues/")
   project(<%text>${PACKAGE_NAME}</%text> C CXX)
-  
+
   # Options
   option(gRPC_BUILD_TESTS "Build tests" OFF)
 
@@ -103,18 +104,21 @@
   set(gRPC_ZLIB_PROVIDER "module" CACHE STRING "Provider of zlib library")
   set_property(CACHE gRPC_ZLIB_PROVIDER PROPERTY STRINGS "module" "package")
 
+  set(gRPC_CARES_PROVIDER "module" CACHE STRING "Provider of c-ares library")
+  set_property(CACHE gRPC_CARES_PROVIDER PROPERTY STRINGS "module" "package")
+
   set(gRPC_SSL_PROVIDER "module" CACHE STRING "Provider of ssl library")
   set_property(CACHE gRPC_SSL_PROVIDER PROPERTY STRINGS "module" "package")
 
   set(gRPC_PROTOBUF_PROVIDER "module" CACHE STRING "Provider of protobuf library")
   set_property(CACHE gRPC_PROTOBUF_PROVIDER PROPERTY STRINGS "module" "package")
-  
+
   set(gRPC_GFLAGS_PROVIDER "module" CACHE STRING "Provider of gflags library")
   set_property(CACHE gRPC_GFLAGS_PROVIDER PROPERTY STRINGS "module" "package")
-  
+
   set(gRPC_BENCHMARK_PROVIDER "module" CACHE STRING "Provider of benchmark library")
   set_property(CACHE gRPC_BENCHMARK_PROVIDER PROPERTY STRINGS "module" "package")
-  
+
   set(gRPC_USE_PROTO_LITE OFF CACHE BOOL "Use the protobuf-lite library")
 
   if(UNIX)
@@ -129,7 +133,7 @@
   if(WIN32)
     set(_gRPC_PLATFORM_WINDOWS ON)
   endif()
-  
+
   ## Some libraries are shared even with BUILD_SHARED_LIBRARIES=OFF
   set(CMAKE_POSITION_INDEPENDENT_CODE TRUE)
 
@@ -170,6 +174,37 @@
     set(_gRPC_FIND_ZLIB "if(NOT ZLIB_FOUND)\n  find_package(ZLIB)\nendif()")
   endif()
 
+  if("<%text>${gRPC_CARES_PROVIDER}</%text>" STREQUAL "module")
+    if(NOT CARES_ROOT_DIR)
+      set(CARES_ROOT_DIR <%text>${CMAKE_CURRENT_SOURCE_DIR}</%text>/src/c-ares)
+    endif()
+    string(TOLOWER <%text>${CMAKE_SYSTEM_NAME}</%text> CARES_SYSTEM_NAME)
+    set(CARES_INCLUDE_DIR "<%text>${CMAKE_CURRENT_SOURCE_DIR}</%text>/third_party/cares/cares")
+    set(CARES_BUILD_INCLUDE_DIR "<%text>${CMAKE_CURRENT_SOURCE_DIR}</%text>/third_party/cares")
+    set(CARES_PLATFORM_INCLUDE_DIR "<%text>${CMAKE_CURRENT_SOURCE_DIR}</%text>/third_party/cares/config_<%text>${CARES_SYSTEM_NAME}</%text>")
+    if(EXISTS "<%text>${CARES_ROOT_DIR}</%text>/CMakeLists.txt")
+      if("<%text>${CARES_SYSTEM_NAME}</%text>" MATCHES "windows")
+        add_definitions(-DCARES_STATICLIB=1)
+        add_definitions(-DWIN32_LEAN_AND_MEAN=1)
+      else()
+        add_definitions(-DHAVE_CONFIG_H=1)
+        add_definitions(-D_GNU_SOURCE=1)
+      endif()
+      add_subdirectory(src/c-ares third_party/cares)
+      if(TARGET cares)
+          set(_gRPC_CARES_LIBRARIES cares)
+      endif()
+    else()
+      message(WARNING "gRPC_CARES_PROVIDER is \"module\" but CARES_ROOT_DIR is wrong")
+    endif()
+  elseif("<%text>${gRPC_CARES_PROVIDER}</%text>" STREQUAL "package")
+    find_package(CARES)
+    if(TARGET CARES::CARES)
+      set(_gRPC_CARES_LIBRARIES CARES::CARES)
+    endif()
+    set(_gRPC_FIND_CARES "if(NOT CARES_FOUND)\n  find_package(CARES)\nendif()")
+  endif()
+
   if("<%text>${gRPC_PROTOBUF_PROVIDER}</%text>" STREQUAL "module")
     # Building the protobuf tests require gmock what is not part of a standard protobuf checkout.
     # Disable them unless they are explicitly requested from the cmake command line (when we assume
@@ -234,7 +269,7 @@
     endif()
     set(_gRPC_FIND_SSL "if(NOT OpenSSL_FOUND)\n  find_package(OpenSSL)\nendif()")
   endif()
-  
+
   if("<%text>${gRPC_GFLAGS_PROVIDER}</%text>" STREQUAL "module")
     if(NOT GFLAGS_ROOT_DIR)
       set(GFLAGS_ROOT_DIR <%text>${CMAKE_CURRENT_SOURCE_DIR}</%text>/third_party/gflags)
@@ -254,7 +289,7 @@
     endif()
     set(_gRPC_FIND_GFLAGS "if(NOT gflags_FOUND)\n  find_package(gflags)\nendif()")
   endif()
-  
+
   if("<%text>${gRPC_BENCHMARK_PROVIDER}</%text>" STREQUAL "module")
     if(NOT BENCHMARK_ROOT_DIR)
       set(BENCHMARK_ROOT_DIR <%text>${CMAKE_CURRENT_SOURCE_DIR}</%text>/third_party/benchmark)
@@ -292,11 +327,11 @@
   if(NOT DEFINED CMAKE_INSTALL_CMAKEDIR)
     set(CMAKE_INSTALL_CMAKEDIR "<%text>${CMAKE_INSTALL_LIBDIR}</%text>/cmake/gRPC")
   endif()
-  
+
   # Create directory for generated .proto files
   set(_gRPC_PROTO_GENS_DIR <%text>${CMAKE_BINARY_DIR}/gens</%text>)
   file(MAKE_DIRECTORY <%text>${_gRPC_PROTO_GENS_DIR}</%text>)
-  
+
   #  protobuf_generate_grpc_cpp
   #  --------------------------
   #
@@ -313,7 +348,7 @@
       message(SEND_ERROR "Error: PROTOBUF_GENERATE_GRPC_CPP() called without any proto files")
       return()
     endif()
-  
+
     set(_protobuf_include_path -I .)
     foreach(FIL <%text>${ARGN}</%text>)
       get_filename_component(ABS_FIL <%text>${FIL}</%text> ABSOLUTE)
@@ -321,7 +356,7 @@
       file(RELATIVE_PATH REL_FIL <%text>${CMAKE_SOURCE_DIR}</%text> <%text>${ABS_FIL}</%text>)
       get_filename_component(REL_DIR <%text>${REL_FIL}</%text> DIRECTORY)
       set(RELFIL_WE "<%text>${REL_DIR}/${FIL_WE}</%text>")
-      
+
       add_custom_command(
         OUTPUT <%text>"${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.grpc.pb.cc"</%text>
                <%text>"${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.grpc.pb.h"</%text>
@@ -337,11 +372,11 @@
         WORKING_DIRECTORY <%text>${CMAKE_SOURCE_DIR}</%text>
         COMMENT "Running gRPC C++ protocol buffer compiler on <%text>${FIL}</%text>"
         VERBATIM)
-        
+
         <%text>set_source_files_properties("${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.grpc.pb.cc" "${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.grpc.pb.h" "${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.pb.cc" "${_gRPC_PROTO_GENS_DIR}/${RELFIL_WE}.pb.h" PROPERTIES GENERATED TRUE)</%text>
     endforeach()
   endfunction()
-  
+
   add_custom_target(plugins
     DEPENDS
   % for tgt in targets:
@@ -350,7 +385,7 @@
   % endif
   % endfor
   )
-  
+
   add_custom_target(tools_c
     DEPENDS
   % for tgt in targets:
@@ -359,7 +394,7 @@
   % endif
   % endfor
   )
-  
+
   add_custom_target(tools_cxx
     DEPENDS
   % for tgt in targets:
@@ -368,10 +403,10 @@
   % endif
   % endfor
   )
-  
+
   add_custom_target(tools
     DEPENDS tools_c tools_cxx)
-  
+
   if (gRPC_BUILD_TESTS)
   add_custom_target(buildtests_c)
   % for tgt in targets:
@@ -381,7 +416,7 @@
   ${get_platforms_condition_end(tgt.platforms)}\
   % endif
   % endfor
-  
+
   add_custom_target(buildtests_cxx)
   % for tgt in targets:
   % if tgt.build == 'test' and tgt.language == 'c++' and not tgt.get('external_deps', None) and not tgt.boringssl:
@@ -390,11 +425,11 @@
   ${get_platforms_condition_end(tgt.platforms)}\
   % endif
   % endfor
-  
+
   add_custom_target(buildtests
     DEPENDS buildtests_c buildtests_cxx)
   endif (gRPC_BUILD_TESTS)
-  
+
   % for lib in libs:
   % if lib.build in ["all", "protoc", "tool", "test", "private"] and not lib.boringssl:
   % if not lib.get('build_system', []) or 'cmake' in lib.get('build_system', []):
@@ -470,6 +505,10 @@
     PRIVATE <%text>${ZLIB_INCLUDE_DIR}</%text>
     PRIVATE <%text>${BENCHMARK}</%text>/include
     PRIVATE <%text>${CMAKE_CURRENT_BINARY_DIR}</%text>/third_party/zlib
+    PRIVATE <%text>${CARES_BUILD_INCLUDE_DIR}</%text>
+    PRIVATE <%text>${CARES_INCLUDE_DIR}</%text>
+    PRIVATE <%text>${CARES_PLATFORM_INCLUDE_DIR}</%text>
+    PRIVATE <%text>${CMAKE_CURRENT_BINARY_DIR}</%text>/third_party/cares/cares
     PRIVATE <%text>${CMAKE_CURRENT_BINARY_DIR}</%text>/third_party/gflags/include
   % if lib.build in ['test', 'private'] and lib.language == 'c++':
     PRIVATE third_party/googletest/include
@@ -519,7 +558,7 @@
     third_party/googletest/src/gtest-all.cc
   % endif
   )
-  
+
   % for src in tgt.src:
   % if proto_re.match(src):
   protobuf_generate_grpc_cpp(
@@ -536,6 +575,10 @@
     PRIVATE <%text>${BENCHMARK_ROOT_DIR}</%text>/include
     PRIVATE <%text>${ZLIB_ROOT_DIR}</%text>
     PRIVATE <%text>${CMAKE_CURRENT_BINARY_DIR}</%text>/third_party/zlib
+    PRIVATE <%text>${CARES_BUILD_INCLUDE_DIR}</%text>
+    PRIVATE <%text>${CARES_INCLUDE_DIR}</%text>
+    PRIVATE <%text>${CARES_PLATFORM_INCLUDE_DIR}</%text>
+    PRIVATE <%text>${CMAKE_CURRENT_BINARY_DIR}</%text>/third_party/cares/cares
     PRIVATE <%text>${CMAKE_CURRENT_BINARY_DIR}</%text>/third_party/gflags/include
   % if tgt.build in ['test', 'private'] and tgt.language == 'c++':
     PRIVATE third_party/googletest/include
diff --git a/templates/Makefile.template b/templates/Makefile.template
index f81d643..3ea69f8 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -405,7 +405,7 @@
   SHARED_VERSION_CPP = -${settings.cpp_version.major}
   SHARED_VERSION_CSHARP = -${settings.csharp_version.major}
   else ifeq ($(SYSTEM),Darwin)
-  EXECUTABLE_SUFFIX = 
+  EXECUTABLE_SUFFIX =
   SHARED_EXT_CORE = dylib
   SHARED_EXT_CPP = dylib
   SHARED_EXT_CSHARP = dylib
@@ -414,7 +414,7 @@
   SHARED_VERSION_CPP =
   SHARED_VERSION_CSHARP =
   else
-  EXECUTABLE_SUFFIX = 
+  EXECUTABLE_SUFFIX =
   SHARED_EXT_CORE = so.$(CORE_VERSION)
   SHARED_EXT_CPP = so.$(CPP_VERSION)
   SHARED_EXT_CSHARP = so.$(CSHARP_VERSION)
@@ -435,6 +435,7 @@
   OPENSSL_NPN_CHECK_CMD = $(PKG_CONFIG) --atleast-version=1.0.1 openssl
   ZLIB_CHECK_CMD = $(PKG_CONFIG) --exists zlib
   PROTOBUF_CHECK_CMD = $(PKG_CONFIG) --atleast-version=3.0.0 protobuf
+  CARES_CHECK_CMD = $(PKG_CONFIG) --exists libcares
   else # HAS_PKG_CONFIG
 
   ifeq ($(SYSTEM),MINGW32)
@@ -448,6 +449,7 @@
   BORINGSSL_COMPILE_CHECK_CMD = $(CC) $(CPPFLAGS) ${defaults.boringssl.CPPFLAGS} $(CFLAGS) ${defaults.boringssl.CFLAGS} -o $(TMPOUT) test/build/boringssl.c $(LDFLAGS)
   ZLIB_CHECK_CMD = $(CC) $(CPPFLAGS) $(CFLAGS) -o $(TMPOUT) test/build/zlib.c -lz $(LDFLAGS)
   PROTOBUF_CHECK_CMD = $(CXX) $(CPPFLAGS) $(CXXFLAGS) -o $(TMPOUT) test/build/protobuf.cc -lprotobuf $(LDFLAGS)
+  CARES_CHECK_CMD = $(CXX) $(CPPFLAGS) $(CXXFLAGS) -o $(TMPOUT) test/build/c-ares.c -lcares $(LDFLAGS)
 
   endif # HAS_PKG_CONFIG
 
@@ -487,12 +489,17 @@
   ifeq ($(HAS_SYSTEM_PROTOBUF),true)
   CACHE_MK += HAS_SYSTEM_PROTOBUF = true,
   endif
+  HAS_SYSTEM_CARES ?=  $(shell $(CARES_CHECK_CMD) 2> /dev/null && echo true || echo false)
+  ifeq ($(HAS_SYSTEM_CARES),true)
+  CACHE_MK += HAS_SYSTEM_CARES = true,
+  endif
   else
   # override system libraries if the config requires a custom compiled library
   HAS_SYSTEM_OPENSSL_ALPN = false
   HAS_SYSTEM_OPENSSL_NPN = false
   HAS_SYSTEM_ZLIB = false
   HAS_SYSTEM_PROTOBUF = false
+  HAS_SYSTEM_CARES = false
   endif
 
   HAS_PROTOC ?= $(shell $(PROTOC_CHECK_CMD) 2> /dev/null && echo true || echo false)
@@ -551,6 +558,12 @@
   HAS_EMBEDDED_PROTOBUF = true
   endif
 
+  ifeq ($(wildcard third_party/cares/cares/ares.h),)
+  HAS_EMBEDDED_CARES = false
+  else
+  HAS_EMBEDDED_CARES = true
+  endif
+
   PC_REQUIRES_GRPC =
   PC_LIBS_GRPC =
 
@@ -583,6 +596,37 @@
   endif
   endif
 
+  CARES_PKG_CONFIG = false
+
+  ifeq ($(HAS_SYSTEM_CARES),false)
+  ifeq ($(HAS_EMBEDDED_CARES), true)
+  EMBED_CARES ?= true
+  else
+  DEP_MISSING += cares
+  EMBED_CARES ?= broken
+  endif
+  else
+  EMBED_CARES ?= false
+  endif
+
+  ifeq ($(EMBED_CARES),true)
+  CARES_DEP = $(LIBDIR)/$(CONFIG)/libares.a
+  CARES_MERGE_OBJS = $(LIBARES_OBJS)
+  CARES_MERGE_LIBS = $(LIBDIR)/$(CONFIG)/libares.a
+  CPPFLAGS := -Ithird_party/cares -Ithird_party/cares/cares $(CPPFLAGS)
+  LDFLAGS := -L$(LIBDIR)/$(CONFIG)/c-ares $(LDFLAGS)
+  else
+  ifeq ($(HAS_PKG_CONFIG),true)
+  PC_REQUIRES_GRPC += libcares
+  CPPFLAGS += $(shell $(PKG_CONFIG) --cflags libcares)
+  LDFLAGS += $(shell $(PKG_CONFIG) --libs-only-L libcares)
+  LIBS += $(patsubst -l%,%,$(shell $(PKG_CONFIG) --libs-only-l libcares))
+  else
+  PC_LIBS_GRPC += -lcares
+  LIBS += cares
+  endif
+  endif
+
   OPENSSL_PKG_CONFIG = false
 
   PC_REQUIRES_SECURE =
@@ -864,6 +908,7 @@
   	$(PERFTOOLS_CHECK_CMD) || true
   	$(PROTOBUF_CHECK_CMD) || true
   	$(PROTOC_CHECK_VERSION_CMD) || true
+  	$(CARES_CHECK_CMD) || true
 
   third_party/protobuf/configure:
   	$(E) "[AUTOGEN] Preparing protobuf"
@@ -1453,6 +1498,9 @@
   % if lib.name != 'z':
   $(ZLIB_DEP) \
   % endif
+  % if lib.name != 'ares':
+  $(CARES_DEP) \
+  % endif
   % endif
   % if lib.language == 'c++':
    $(PROTOBUF_DEP)\
@@ -1461,6 +1509,7 @@
   % if lib.get('baselib', False):
    $(LIBGPR_OBJS) \
    $(ZLIB_MERGE_OBJS) \
+   $(CARES_MERGE_OBJS) \
   % if lib.get('secure', 'check') == True:
    $(OPENSSL_MERGE_OBJS) \
   % endif
@@ -1473,6 +1522,7 @@
   % if lib.get('baselib', False):
    $(LIBGPR_OBJS) \
    $(ZLIB_MERGE_OBJS) \
+   $(CARES_MERGE_OBJS) \
   % if lib.get('secure', 'check') == True:
    $(OPENSSL_MERGE_OBJS) \
   % endif
@@ -1495,9 +1545,9 @@
     common = '$(LIB' + lib.name.upper() + '_OBJS)'
 
     link_libs = ''
-    lib_deps = ' $(ZLIB_DEP)'
+    lib_deps = ' $(ZLIB_DEP) $(CARES_DEP)'
     mingw_libs = ''
-    mingw_lib_deps = ' $(ZLIB_DEP)'
+    mingw_lib_deps = ' $(ZLIB_DEP) $(CARES_DEP)'
     if lib.language == 'c++':
       lib_deps += ' $(PROTOBUF_DEP)'
       mingw_lib_deps += ' $(PROTOBUF_DEP)'
@@ -1522,7 +1572,7 @@
     security = lib.get('secure', 'check')
     if security == True:
       common = common + ' $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE)'
-    common = common + ' $(ZLIB_MERGE_LIBS)'
+    common = common + ' $(ZLIB_MERGE_LIBS) $(CARES_MERGE_LIBS)'
 
     if security in [True, 'check']:
       for src in lib.src:
diff --git a/templates/binding.gyp.template b/templates/binding.gyp.template
index 5e401e8..5ac97d2 100644
--- a/templates/binding.gyp.template
+++ b/templates/binding.gyp.template
@@ -41,11 +41,9 @@
   {
     'variables': {
       'runtime%': 'node',
-      # UV integration in C core is disabled by default while bugs are ironed
-      # out. It can be re-enabled for one build by setting the npm config
-      # variable grpc_uv to true, and it can be re-enabled permanently by
-      # setting it to true here.
-      'grpc_uv%': 'false',
+      # UV integration in C core is enabled by default. It can be disabled
+      # by setting this argument to anything else.
+      'grpc_uv%': 'true',
       # Some Node installations use the system installation of OpenSSL, and on
       # some systems, the system OpenSSL still does not have ALPN support. This
       # will let users recompile gRPC to work without ALPN.
@@ -62,6 +60,9 @@
       'conditions': [
         ['grpc_uv=="true"', {
           'defines': [
+            'GRPC_ARES=0',
+            # Disabling this while bugs are ironed out. Uncomment this to
+            # re-enable libuv integration in C core.
             'GRPC_UV'
           ]
         }],
@@ -107,7 +108,8 @@
         }],
         ['OS == "win"', {
           "include_dirs": [
-            "third_party/zlib"
+            "third_party/zlib",
+            "third_party/cares/cares"
           ],
           "defines": [
             '_WIN32_WINNT=0x0600',
@@ -130,7 +132,8 @@
             'config': '<!(echo $CONFIG)',
           },
           'include_dirs': [
-            '<(node_root_dir)/deps/zlib'
+            '<(node_root_dir)/deps/zlib',
+            '<(node_root_dir)/deps/cares/include',
           ],
           'conditions': [
             ['config=="gcov"', {
@@ -236,6 +239,13 @@
       }]
     ],
     'targets': [
+  <%
+      for lib in libs:
+        if 'grpc' in lib.transitive_deps or lib.name == 'grpc':
+          lib.deps.append('node_modules/cares/deps/cares/cares.gyp:cares')
+      for module in node_modules:
+        module.deps.append('node_modules/cares/deps/cares/cares.gyp:cares')
+  %>
       % for module in node_modules:
       % for lib in libs:
       % if lib.name in module.transitive_deps and lib.name not in ('boringssl', 'z'):
diff --git a/templates/gRPC-Core.podspec.template b/templates/gRPC-Core.podspec.template
index 9ed32e3..cbebc5d 100644
--- a/templates/gRPC-Core.podspec.template
+++ b/templates/gRPC-Core.podspec.template
@@ -78,7 +78,7 @@
       :submodules => true,
     }
 
-    s.ios.deployment_target = '7.1'
+    s.ios.deployment_target = '7.0'
     s.osx.deployment_target = '10.9'
     s.requires_arc = false
 
@@ -131,6 +131,7 @@
     }
 
     s.default_subspecs = 'Interface', 'Implementation'
+    s.compiler_flags = '-DGRPC_ARES=0'
 
     # Like many other C libraries, gRPC-Core has its public headers under `include/<libname>/` and its
     # sources and private headers in other directories outside `include/`. Cocoapods' linter doesn't
@@ -161,8 +162,7 @@
 
     s.subspec 'Cronet-Interface' do |ss|
       ss.header_mappings_dir = 'include/grpc'
-      ss.source_files = 'include/grpc/grpc_cronet.h',
-                        'src/core/ext/transport/cronet/transport/cronet_transport.h'
+      ss.source_files = 'include/grpc/grpc_cronet.h'
     end
 
     s.subspec 'Cronet-Implementation' do |ss|
@@ -173,7 +173,7 @@
       ss.dependency "#{s.name}/Cronet-Interface", version
 
       ss.source_files = 'src/core/ext/transport/cronet/client/secure/cronet_channel_create.c',
-                        'src/core/ext/transport/cronet/transport/cronet_transport.c',
+                        'src/core/ext/transport/cronet/transport/cronet_transport.{c,h}',
                         'third_party/objective_c/Cronet/bidirectional_stream_c.h'
     end
 
@@ -188,7 +188,7 @@
                         'test/core/end2end/end2end_test_utils.c',
                         'test/core/end2end/tests/*.{c,h}',
                         'test/core/end2end/data/*.{c,h}',
-                        'test/core/util/debugger_macros.c',
+                        'test/core/util/debugger_macros.{c,h}',
                         'test/core/util/test_config.{c,h}',
                         'test/core/util/port.h',
                         'test/core/util/port.c',
diff --git a/templates/gRPC-ProtoRPC.podspec.template b/templates/gRPC-ProtoRPC.podspec.template
index 5d7d90d..47b22dd 100644
--- a/templates/gRPC-ProtoRPC.podspec.template
+++ b/templates/gRPC-ProtoRPC.podspec.template
@@ -50,7 +50,7 @@
       :tag => "v#{version}",
     }
 
-    s.ios.deployment_target = '7.1'
+    s.ios.deployment_target = '7.0'
     s.osx.deployment_target = '10.9'
 
     name = 'ProtoRPC'
diff --git a/templates/gRPC-RxLibrary.podspec.template b/templates/gRPC-RxLibrary.podspec.template
index 35a06c8..48f0df8 100644
--- a/templates/gRPC-RxLibrary.podspec.template
+++ b/templates/gRPC-RxLibrary.podspec.template
@@ -50,7 +50,7 @@
       :tag => "v#{version}",
     }
 
-    s.ios.deployment_target = '7.1'
+    s.ios.deployment_target = '7.0'
     s.osx.deployment_target = '10.9'
 
     name = 'RxLibrary'
diff --git a/templates/gRPC.podspec.template b/templates/gRPC.podspec.template
index d33ce27..ce47360 100644
--- a/templates/gRPC.podspec.template
+++ b/templates/gRPC.podspec.template
@@ -49,7 +49,7 @@
       :tag => "v#{version}",
     }
 
-    s.ios.deployment_target = '7.1'
+    s.ios.deployment_target = '7.0'
     s.osx.deployment_target = '10.9'
 
     name = 'GRPCClient'
diff --git a/templates/package.json.template b/templates/package.json.template
index 316c28e..d093883 100644
--- a/templates/package.json.template
+++ b/templates/package.json.template
@@ -26,7 +26,7 @@
       "electron-build": "./node_modules/.bin/node-pre-gyp configure build --runtime=electron --disturl=https://atom.io/download/atom-shell",
       "gen_docs": "./node_modules/.bin/jsdoc -c src/node/jsdoc_conf.json",
       "coverage": "./node_modules/.bin/istanbul cover ./node_modules/.bin/_mocha src/node/test",
-      "install": "./node_modules/.bin/node-pre-gyp install --fallback-to-build"
+      "install": "./node_modules/.bin/node-pre-gyp install --fallback-to-build --library=static_library"
     },
     "bundledDependencies": [
       "node-pre-gyp"
@@ -36,7 +36,8 @@
       "lodash": "^4.15.0",
       "nan": "^2.0.0",
       "node-pre-gyp": "^0.6.0",
-      "protobufjs": "^5.0.0"
+      "protobufjs": "^5.0.0",
+      "cares": "^1.1.5"
     },
     "devDependencies": {
       "async": "^2.0.1",
@@ -54,7 +55,7 @@
       "poisson-process": "^0.2.1"
     },
     "engines": {
-      "node": ">=1.1.0"
+      "node": ">=4"
     },
     "binary": {
       "module_name": "grpc_node",
diff --git "a/templates/src/objective-c/\041ProtoCompiler-gRPCPlugin.podspec.template" "b/templates/src/objective-c/\041ProtoCompiler-gRPCPlugin.podspec.template"
index 3a10cfa..d7d84f3 100644
--- "a/templates/src/objective-c/\041ProtoCompiler-gRPCPlugin.podspec.template"
+++ "b/templates/src/objective-c/\041ProtoCompiler-gRPCPlugin.podspec.template"
@@ -103,9 +103,9 @@
     s.preserve_paths = plugin
 
     # Restrict the protoc version to the one supported by this plugin.
-    s.dependency '!ProtoCompiler', '3.1.0'
+    s.dependency '!ProtoCompiler', '3.2.0'
     # For the Protobuf dependency not to complain:
-    s.ios.deployment_target = '7.1'
+    s.ios.deployment_target = '7.0'
     s.osx.deployment_target = '10.9'
     # Restrict the gRPC runtime version to the one supported by this plugin.
     s.dependency 'gRPC-ProtoRPC', v
diff --git a/test/build/c-ares.c b/test/build/c-ares.c
new file mode 100644
index 0000000..c954e93
--- /dev/null
+++ b/test/build/c-ares.c
@@ -0,0 +1,43 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <ares.h>
+
+int main(void) {
+  ares_channel channelptr;
+
+  ares_init(&channelptr);
+  ares_destroy(channelptr);
+
+  return 0;
+}
diff --git a/test/core/client_channel/resolvers/dns_resolver_connectivity_test.c b/test/core/client_channel/resolvers/dns_resolver_connectivity_test.c
index b85ca89..8449afc 100644
--- a/test/core/client_channel/resolvers/dns_resolver_connectivity_test.c
+++ b/test/core/client_channel/resolvers/dns_resolver_connectivity_test.c
@@ -48,22 +48,26 @@
 static bool g_fail_resolution = true;
 static grpc_combiner *g_combiner;
 
-static grpc_error *my_resolve_address(const char *name, const char *addr,
-                                      grpc_resolved_addresses **addrs) {
+static void my_resolve_address(grpc_exec_ctx *exec_ctx, const char *addr,
+                               const char *default_port,
+                               grpc_pollset_set *interested_parties,
+                               grpc_closure *on_done,
+                               grpc_resolved_addresses **addrs) {
   gpr_mu_lock(&g_mu);
-  GPR_ASSERT(0 == strcmp("test", name));
+  GPR_ASSERT(0 == strcmp("test", addr));
+  grpc_error *error = GRPC_ERROR_NONE;
   if (g_fail_resolution) {
     g_fail_resolution = false;
     gpr_mu_unlock(&g_mu);
-    return GRPC_ERROR_CREATE_FROM_STATIC_STRING("Forced Failure");
+    error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Forced Failure");
   } else {
     gpr_mu_unlock(&g_mu);
     *addrs = gpr_malloc(sizeof(**addrs));
     (*addrs)->naddrs = 1;
     (*addrs)->addrs = gpr_malloc(sizeof(*(*addrs)->addrs));
     (*addrs)->addrs[0].len = 123;
-    return GRPC_ERROR_NONE;
   }
+  grpc_closure_sched(exec_ctx, on_done, error);
 }
 
 static grpc_resolver *create_resolver(grpc_exec_ctx *exec_ctx,
@@ -135,7 +139,7 @@
   grpc_init();
   gpr_mu_init(&g_mu);
   g_combiner = grpc_combiner_create(NULL);
-  grpc_blocking_resolve_address = my_resolve_address;
+  grpc_resolve_address = my_resolve_address;
   grpc_channel_args *result = (grpc_channel_args *)1;
 
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
diff --git a/test/core/end2end/connection_refused_test.c b/test/core/end2end/connection_refused_test.c
index 16a3005..6ded12a 100644
--- a/test/core/end2end/connection_refused_test.c
+++ b/test/core/end2end/connection_refused_test.c
@@ -53,7 +53,6 @@
 static void run_test(bool wait_for_ready, bool use_service_config) {
   grpc_channel *chan;
   grpc_call *call;
-  gpr_timespec deadline = grpc_timeout_seconds_to_deadline(2);
   grpc_completion_queue *cq;
   cq_verifier *cqv;
   grpc_op ops[6];
@@ -98,6 +97,7 @@
   gpr_log(GPR_INFO, "server: %s", addr);
   chan = grpc_insecure_channel_create(addr, args, NULL);
   grpc_slice host = grpc_slice_from_static_string("nonexistant");
+  gpr_timespec deadline = grpc_timeout_seconds_to_deadline(2);
   call = grpc_channel_create_call(
       chan, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
       grpc_slice_from_static_string("/service/method"), &host, deadline, NULL);
diff --git a/test/core/end2end/fuzzers/api_fuzzer.c b/test/core/end2end/fuzzers/api_fuzzer.c
index 9cc3f56..a0acf5b 100644
--- a/test/core/end2end/fuzzers/api_fuzzer.c
+++ b/test/core/end2end/fuzzers/api_fuzzer.c
@@ -719,10 +719,10 @@
   grpc_test_only_set_slice_hash_seed(0);
   if (squelch) gpr_set_log_function(dont_log);
   input_stream inp = {data, data + size};
-  grpc_resolve_address = my_resolve_address;
   grpc_tcp_client_connect_impl = my_tcp_client_connect;
   gpr_now_impl = now_impl;
   grpc_init();
+  grpc_resolve_address = my_resolve_address;
 
   GPR_ASSERT(g_channel == NULL);
   GPR_ASSERT(g_server == NULL);
diff --git a/test/core/end2end/goaway_server_test.c b/test/core/end2end/goaway_server_test.c
index 4bb258e..22d93b3 100644
--- a/test/core/end2end/goaway_server_test.c
+++ b/test/core/end2end/goaway_server_test.c
@@ -52,9 +52,11 @@
 
 static gpr_mu g_mu;
 static int g_resolve_port = -1;
-static grpc_error *(*iomgr_resolve_address)(const char *name,
-                                            const char *default_port,
-                                            grpc_resolved_addresses **addrs);
+static void (*iomgr_resolve_address)(grpc_exec_ctx *exec_ctx, const char *addr,
+                                     const char *default_port,
+                                     grpc_pollset_set *interested_parties,
+                                     grpc_closure *on_done,
+                                     grpc_resolved_addresses **addresses);
 
 static void set_resolve_port(int port) {
   gpr_mu_lock(&g_mu);
@@ -62,16 +64,22 @@
   gpr_mu_unlock(&g_mu);
 }
 
-static grpc_error *my_resolve_address(const char *name, const char *addr,
-                                      grpc_resolved_addresses **addrs) {
-  if (0 != strcmp(name, "test")) {
-    return iomgr_resolve_address(name, addr, addrs);
+static void my_resolve_address(grpc_exec_ctx *exec_ctx, const char *addr,
+                               const char *default_port,
+                               grpc_pollset_set *interested_parties,
+                               grpc_closure *on_done,
+                               grpc_resolved_addresses **addrs) {
+  if (0 != strcmp(addr, "test")) {
+    iomgr_resolve_address(exec_ctx, addr, default_port, interested_parties,
+                          on_done, addrs);
+    return;
   }
 
+  grpc_error *error = GRPC_ERROR_NONE;
   gpr_mu_lock(&g_mu);
   if (g_resolve_port < 0) {
     gpr_mu_unlock(&g_mu);
-    return GRPC_ERROR_CREATE_FROM_STATIC_STRING("Forced Failure");
+    error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Forced Failure");
   } else {
     *addrs = gpr_malloc(sizeof(**addrs));
     (*addrs)->naddrs = 1;
@@ -83,8 +91,8 @@
     sa->sin_port = htons((uint16_t)g_resolve_port);
     (*addrs)->addrs[0].len = sizeof(*sa);
     gpr_mu_unlock(&g_mu);
-    return GRPC_ERROR_NONE;
   }
+  grpc_closure_sched(exec_ctx, on_done, error);
 }
 
 int main(int argc, char **argv) {
@@ -96,9 +104,9 @@
   grpc_test_init(argc, argv);
 
   gpr_mu_init(&g_mu);
-  iomgr_resolve_address = grpc_blocking_resolve_address;
-  grpc_blocking_resolve_address = my_resolve_address;
   grpc_init();
+  iomgr_resolve_address = grpc_resolve_address;
+  grpc_resolve_address = my_resolve_address;
 
   int was_cancelled1;
   int was_cancelled2;
diff --git a/test/core/http/httpcli_test.c b/test/core/http/httpcli_test.c
index f690dba..d3b45c4 100644
--- a/test/core/http/httpcli_test.c
+++ b/test/core/http/httpcli_test.c
@@ -102,7 +102,7 @@
         "pollset_work",
         grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
                           &worker, gpr_now(GPR_CLOCK_MONOTONIC),
-                          n_seconds_time(20))));
+                          n_seconds_time(1))));
     gpr_mu_unlock(g_mu);
     grpc_exec_ctx_finish(&exec_ctx);
     gpr_mu_lock(g_mu);
@@ -144,7 +144,7 @@
         "pollset_work",
         grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
                           &worker, gpr_now(GPR_CLOCK_MONOTONIC),
-                          n_seconds_time(20))));
+                          n_seconds_time(1))));
     gpr_mu_unlock(g_mu);
     grpc_exec_ctx_finish(&exec_ctx);
     gpr_mu_lock(g_mu);
diff --git a/test/core/http/httpscli_test.c b/test/core/http/httpscli_test.c
index 5494110..acc9409 100644
--- a/test/core/http/httpscli_test.c
+++ b/test/core/http/httpscli_test.c
@@ -103,7 +103,7 @@
         "pollset_work",
         grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
                           &worker, gpr_now(GPR_CLOCK_MONOTONIC),
-                          n_seconds_time(20))));
+                          n_seconds_time(1))));
     gpr_mu_unlock(g_mu);
     grpc_exec_ctx_finish(&exec_ctx);
     gpr_mu_lock(g_mu);
@@ -146,7 +146,7 @@
         "pollset_work",
         grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
                           &worker, gpr_now(GPR_CLOCK_MONOTONIC),
-                          n_seconds_time(20))));
+                          n_seconds_time(1))));
     gpr_mu_unlock(g_mu);
     grpc_exec_ctx_finish(&exec_ctx);
     gpr_mu_lock(g_mu);
diff --git a/test/core/iomgr/ev_epoll_linux_test.c b/test/core/iomgr/ev_epoll_linux_test.c
index d69f9a9..8a7a970 100644
--- a/test/core/iomgr/ev_epoll_linux_test.c
+++ b/test/core/iomgr/ev_epoll_linux_test.c
@@ -139,23 +139,25 @@
  * polling_island_merge()[ev_epoll_linux.c], where the parent relationship was
  * inverted.
  */
+
+#define NUM_FDS 2
+#define NUM_POLLSETS 2
+#define NUM_CLOSURES 4
+
 static void test_pollset_queue_merge_items() {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  const int num_fds = 2;
-  const int num_pollsets = 2;
-  const int num_closures = 4;
-  test_fd tfds[num_fds];
-  int fds[num_fds];
-  test_pollset pollsets[num_pollsets];
-  grpc_closure closures[num_closures];
+  test_fd tfds[NUM_FDS];
+  int fds[NUM_FDS];
+  test_pollset pollsets[NUM_POLLSETS];
+  grpc_closure closures[NUM_CLOSURES];
   int i;
   int result = 0;
 
-  test_fd_init(tfds, fds, num_fds);
-  test_pollset_init(pollsets, num_pollsets);
+  test_fd_init(tfds, fds, NUM_FDS);
+  test_pollset_init(pollsets, NUM_POLLSETS);
 
   /* Two distinct polling islands, each with their own FD and pollset. */
-  for (i = 0; i < num_fds; i++) {
+  for (i = 0; i < NUM_FDS; i++) {
     grpc_pollset_add_fd(&exec_ctx, pollsets[i].pollset, tfds[i].fd);
     grpc_exec_ctx_flush(&exec_ctx);
   }
@@ -173,7 +175,7 @@
   grpc_closure_init(
       closures + 3, increment, &result,
       grpc_workqueue_scheduler(grpc_fd_get_polling_island(tfds[1].fd)));
-  for (i = 0; i < num_closures; ++i) {
+  for (i = 0; i < NUM_CLOSURES; ++i) {
     grpc_closure_sched(&exec_ctx, closures + i, GRPC_ERROR_NONE);
   }
 
@@ -186,7 +188,7 @@
    * the merged polling island.
    */
   grpc_pollset_worker *worker = NULL;
-  for (i = 0; i < num_closures; ++i) {
+  for (i = 0; i < NUM_CLOSURES; ++i) {
     const gpr_timespec deadline = gpr_time_add(
         gpr_now(GPR_CLOCK_MONOTONIC), gpr_time_from_seconds(2, GPR_TIMESPAN));
     gpr_mu_lock(pollsets[1].mu);
@@ -196,13 +198,17 @@
                           gpr_now(GPR_CLOCK_MONOTONIC), deadline));
     gpr_mu_unlock(pollsets[1].mu);
   }
-  GPR_ASSERT(result == num_closures);
+  GPR_ASSERT(result == NUM_CLOSURES);
 
-  test_fd_cleanup(&exec_ctx, tfds, num_fds);
-  test_pollset_cleanup(&exec_ctx, pollsets, num_pollsets);
+  test_fd_cleanup(&exec_ctx, tfds, NUM_FDS);
+  test_pollset_cleanup(&exec_ctx, pollsets, NUM_POLLSETS);
   grpc_exec_ctx_finish(&exec_ctx);
 }
 
+#undef NUM_FDS
+#undef NUM_POLLSETS
+#undef NUM_CLOSURES
+
 /*
  * Cases to test:
  *  case 1) Polling islands of both fd and pollset are NULL
@@ -213,18 +219,20 @@
  *     case 4.2) Polling islands of fd and pollset are NOT-equal (This results
  *     in a merge)
  * */
+
+#define NUM_FDS 8
+#define NUM_POLLSETS 4
+
 static void test_add_fd_to_pollset() {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  const int num_fds = 8;
-  const int num_pollsets = 4;
-  test_fd tfds[num_fds];
-  int fds[num_fds];
-  test_pollset pollsets[num_pollsets];
+  test_fd tfds[NUM_FDS];
+  int fds[NUM_FDS];
+  test_pollset pollsets[NUM_POLLSETS];
   void *expected_pi = NULL;
   int i;
 
-  test_fd_init(tfds, fds, num_fds);
-  test_pollset_init(pollsets, num_pollsets);
+  test_fd_init(tfds, fds, NUM_FDS);
+  test_pollset_init(pollsets, NUM_POLLSETS);
 
   /*Step 1.
    * Create three polling islands (This will exercise test case 1 and 2) with
@@ -285,22 +293,25 @@
 
   /* Compare Fd:0's polling island with that of all other Fds */
   expected_pi = grpc_fd_get_polling_island(tfds[0].fd);
-  for (i = 1; i < num_fds; i++) {
+  for (i = 1; i < NUM_FDS; i++) {
     GPR_ASSERT(grpc_are_polling_islands_equal(
         expected_pi, grpc_fd_get_polling_island(tfds[i].fd)));
   }
 
   /* Compare Fd:0's polling island with that of all other pollsets */
-  for (i = 0; i < num_pollsets; i++) {
+  for (i = 0; i < NUM_POLLSETS; i++) {
     GPR_ASSERT(grpc_are_polling_islands_equal(
         expected_pi, grpc_pollset_get_polling_island(pollsets[i].pollset)));
   }
 
-  test_fd_cleanup(&exec_ctx, tfds, num_fds);
-  test_pollset_cleanup(&exec_ctx, pollsets, num_pollsets);
+  test_fd_cleanup(&exec_ctx, tfds, NUM_FDS);
+  test_pollset_cleanup(&exec_ctx, pollsets, NUM_POLLSETS);
   grpc_exec_ctx_finish(&exec_ctx);
 }
 
+#undef NUM_FDS
+#undef NUM_POLLSETS
+
 int main(int argc, char **argv) {
   const char *poll_strategy = NULL;
   grpc_test_init(argc, argv);
diff --git a/test/core/iomgr/udp_server_test.c b/test/core/iomgr/udp_server_test.c
index 396ec95..12d8406 100644
--- a/test/core/iomgr/udp_server_test.c
+++ b/test/core/iomgr/udp_server_test.c
@@ -48,9 +48,12 @@
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/time.h>
+#include <grpc/support/useful.h>
 
+#include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/iomgr/ev_posix.h"
 #include "src/core/lib/iomgr/iomgr.h"
+#include "src/core/lib/iomgr/socket_factory_posix.h"
 #include "test/core/util/test_config.h"
 
 #define LOG_TEST(x) gpr_log(GPR_INFO, "%s", #x)
@@ -94,16 +97,59 @@
   g_number_of_orphan_calls++;
 }
 
+struct test_socket_factory {
+  grpc_socket_factory base;
+  int number_of_socket_calls;
+  int number_of_bind_calls;
+};
+typedef struct test_socket_factory test_socket_factory;
+
+static int test_socket_factory_socket(grpc_socket_factory *factory, int domain,
+                                      int type, int protocol) {
+  test_socket_factory *f = (test_socket_factory *)factory;
+  f->number_of_socket_calls++;
+  return socket(domain, type, protocol);
+}
+
+static int test_socket_factory_bind(grpc_socket_factory *factory, int sockfd,
+                                    const grpc_resolved_address *addr) {
+  test_socket_factory *f = (test_socket_factory *)factory;
+  f->number_of_bind_calls++;
+  return bind(sockfd, (struct sockaddr *)addr->addr, (socklen_t)addr->len);
+}
+
+static int test_socket_factory_compare(grpc_socket_factory *a,
+                                       grpc_socket_factory *b) {
+  return GPR_ICMP(a, b);
+}
+
+static void test_socket_factory_destroy(grpc_socket_factory *factory) {
+  test_socket_factory *f = (test_socket_factory *)factory;
+  gpr_free(f);
+}
+
+static const grpc_socket_factory_vtable test_socket_factory_vtable = {
+    test_socket_factory_socket, test_socket_factory_bind,
+    test_socket_factory_compare, test_socket_factory_destroy};
+
+static test_socket_factory *test_socket_factory_create(void) {
+  test_socket_factory *factory = gpr_malloc(sizeof(test_socket_factory));
+  grpc_socket_factory_init(&factory->base, &test_socket_factory_vtable);
+  factory->number_of_socket_calls = 0;
+  factory->number_of_bind_calls = 0;
+  return factory;
+}
+
 static void test_no_op(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_udp_server *s = grpc_udp_server_create();
+  grpc_udp_server *s = grpc_udp_server_create(NULL);
   grpc_udp_server_destroy(&exec_ctx, s, NULL);
   grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_no_op_with_start(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_udp_server *s = grpc_udp_server_create();
+  grpc_udp_server *s = grpc_udp_server_create(NULL);
   LOG_TEST("test_no_op_with_start");
   grpc_udp_server_start(&exec_ctx, s, NULL, 0, NULL);
   grpc_udp_server_destroy(&exec_ctx, s, NULL);
@@ -115,7 +161,7 @@
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in *addr = (struct sockaddr_in *)resolved_addr.addr;
-  grpc_udp_server *s = grpc_udp_server_create();
+  grpc_udp_server *s = grpc_udp_server_create(NULL);
   LOG_TEST("test_no_op_with_port");
 
   memset(&resolved_addr, 0, sizeof(resolved_addr));
@@ -131,12 +177,44 @@
   GPR_ASSERT(g_number_of_orphan_calls == 1);
 }
 
+static void test_no_op_with_port_and_socket_factory(void) {
+  g_number_of_orphan_calls = 0;
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_resolved_address resolved_addr;
+  struct sockaddr_in *addr = (struct sockaddr_in *)resolved_addr.addr;
+
+  test_socket_factory *socket_factory = test_socket_factory_create();
+  grpc_arg socket_factory_arg =
+      grpc_socket_factory_to_arg(&socket_factory->base);
+  grpc_channel_args *channel_args =
+      grpc_channel_args_copy_and_add(NULL, &socket_factory_arg, 1);
+  grpc_udp_server *s = grpc_udp_server_create(channel_args);
+  grpc_channel_args_destroy(&exec_ctx, channel_args);
+
+  LOG_TEST("test_no_op_with_port_and_socket_factory");
+
+  memset(&resolved_addr, 0, sizeof(resolved_addr));
+  resolved_addr.len = sizeof(struct sockaddr_in);
+  addr->sin_family = AF_INET;
+  GPR_ASSERT(grpc_udp_server_add_port(s, &resolved_addr, on_read, on_write,
+                                      on_fd_orphaned));
+  GPR_ASSERT(socket_factory->number_of_socket_calls == 1);
+  GPR_ASSERT(socket_factory->number_of_bind_calls == 1);
+
+  grpc_udp_server_destroy(&exec_ctx, s, NULL);
+  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_socket_factory_unref(&socket_factory->base);
+
+  /* The server had a single FD, which should have been orphaned. */
+  GPR_ASSERT(g_number_of_orphan_calls == 1);
+}
+
 static void test_no_op_with_port_and_start(void) {
   g_number_of_orphan_calls = 0;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in *addr = (struct sockaddr_in *)resolved_addr.addr;
-  grpc_udp_server *s = grpc_udp_server_create();
+  grpc_udp_server *s = grpc_udp_server_create(NULL);
   LOG_TEST("test_no_op_with_port_and_start");
 
   memset(&resolved_addr, 0, sizeof(resolved_addr));
@@ -160,7 +238,7 @@
   grpc_resolved_address resolved_addr;
   struct sockaddr_storage *addr = (struct sockaddr_storage *)resolved_addr.addr;
   int clifd, svrfd;
-  grpc_udp_server *s = grpc_udp_server_create();
+  grpc_udp_server *s = grpc_udp_server_create(NULL);
   int i;
   int number_of_reads_before;
   gpr_timespec deadline;
@@ -243,6 +321,7 @@
   test_no_op();
   test_no_op_with_start();
   test_no_op_with_port();
+  test_no_op_with_port_and_socket_factory();
   test_no_op_with_port_and_start();
   test_receive(1);
   test_receive(10);
diff --git a/test/core/memory_usage/client.c b/test/core/memory_usage/client.c
index 107abbc..51ea51b 100644
--- a/test/core/memory_usage/client.c
+++ b/test/core/memory_usage/client.c
@@ -237,6 +237,11 @@
       0, grpc_slice_from_static_string("Reflector/GetAfterSvrCreation"));
 
   // warmup period
+  for (int i = 0; i < warmup_iterations; i++) {
+    send_snapshot_request(
+        0, grpc_slice_from_static_string("Reflector/SimpleSnapshot"));
+  }
+
   for (call_idx = 0; call_idx < warmup_iterations; ++call_idx) {
     init_ping_pong_request(call_idx + 1);
   }
diff --git a/test/cpp/common/channel_arguments_test.cc b/test/cpp/common/channel_arguments_test.cc
index 9bcc9f9..8e7b56c 100644
--- a/test/cpp/common/channel_arguments_test.cc
+++ b/test/cpp/common/channel_arguments_test.cc
@@ -243,6 +243,22 @@
 
   channel_args_.SetUserAgentPrefix(prefix);
   EXPECT_TRUE(HasArg(arg0));
+
+  // Test if the user agent string is copied correctly
+  ChannelArguments new_channel_args(channel_args_);
+  grpc_channel_args args;
+  SetChannelArgs(new_channel_args, &args);
+  bool found = false;
+  for (size_t i = 0; i < args.num_args; i++) {
+    const grpc_arg& arg = args.args[i];
+    if (arg.type == GRPC_ARG_STRING &&
+        grpc::string(arg.key) == GRPC_ARG_PRIMARY_USER_AGENT_STRING) {
+      EXPECT_FALSE(found);
+      EXPECT_EQ(0, strcmp(arg.value.string, arg0.value.string));
+      found = true;
+    }
+  }
+  EXPECT_TRUE(found);
 }
 
 }  // namespace testing
diff --git a/third_party/cares/ares_build.h b/third_party/cares/ares_build.h
new file mode 100644
index 0000000..7d69f1e
--- /dev/null
+++ b/third_party/cares/ares_build.h
@@ -0,0 +1,254 @@
+#ifndef __CARES_BUILD_H
+#define __CARES_BUILD_H
+
+
+/* Copyright (C) 2009 - 2013 by Daniel Stenberg et al
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose and without fee is hereby granted, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  M.I.T. makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ */
+
+/* ================================================================ */
+/*               NOTES FOR CONFIGURE CAPABLE SYSTEMS                */
+/* ================================================================ */
+
+/*
+ * NOTE 1:
+ * -------
+ *
+ * See file ares_build.h.in, run configure, and forget that this file
+ * exists it is only used for non-configure systems.
+ * But you can keep reading if you want ;-)
+ *
+ */
+
+/* ================================================================ */
+/*                 NOTES FOR NON-CONFIGURE SYSTEMS                  */
+/* ================================================================ */
+
+/*
+ * NOTE 1:
+ * -------
+ *
+ * Nothing in this file is intended to be modified or adjusted by the
+ * c-ares library user nor by the c-ares library builder.
+ *
+ * If you think that something actually needs to be changed, adjusted
+ * or fixed in this file, then, report it on the c-ares development
+ * mailing list: http://cool.haxx.se/mailman/listinfo/c-ares/
+ *
+ * Try to keep one section per platform, compiler and architecture,
+ * otherwise, if an existing section is reused for a different one and
+ * later on the original is adjusted, probably the piggybacking one can
+ * be adversely changed.
+ *
+ * In order to differentiate between platforms/compilers/architectures
+ * use only compiler built in predefined preprocessor symbols.
+ *
+ * This header file shall only export symbols which are 'cares' or 'CARES'
+ * prefixed, otherwise public name space would be polluted.
+ *
+ * NOTE 2:
+ * -------
+ *
+ * Right now you might be staring at file ares_build.h.dist or ares_build.h,
+ * this is due to the following reason: file ares_build.h.dist is renamed
+ * to ares_build.h when the c-ares source code distribution archive file is
+ * created.
+ *
+ * File ares_build.h.dist is not included in the distribution archive.
+ * File ares_build.h is not present in the git tree.
+ *
+ * The distributed ares_build.h file is only intended to be used on systems
+ * which can not run the also distributed configure script.
+ *
+ * On systems capable of running the configure script, the configure process
+ * will overwrite the distributed ares_build.h file with one that is suitable
+ * and specific to the library being configured and built, which is generated
+ * from the ares_build.h.in template file.
+ *
+ * If you check out from git on a non-configure platform, you must run the
+ * appropriate buildconf* script to set up ares_build.h and other local files.
+ *
+ */
+
+/* ================================================================ */
+/*  DEFINITION OF THESE SYMBOLS SHALL NOT TAKE PLACE ANYWHERE ELSE  */
+/* ================================================================ */
+
+#ifdef CARES_SIZEOF_LONG
+#  error "CARES_SIZEOF_LONG shall not be defined except in ares_build.h"
+   Error Compilation_aborted_CARES_SIZEOF_LONG_already_defined
+#endif
+
+#ifdef CARES_TYPEOF_ARES_SOCKLEN_T
+#  error "CARES_TYPEOF_ARES_SOCKLEN_T shall not be defined except in ares_build.h"
+   Error Compilation_aborted_CARES_TYPEOF_ARES_SOCKLEN_T_already_defined
+#endif
+
+#ifdef CARES_SIZEOF_ARES_SOCKLEN_T
+#  error "CARES_SIZEOF_ARES_SOCKLEN_T shall not be defined except in ares_build.h"
+   Error Compilation_aborted_CARES_SIZEOF_ARES_SOCKLEN_T_already_defined
+#endif
+
+/* ================================================================ */
+/*    EXTERNAL INTERFACE SETTINGS FOR NON-CONFIGURE SYSTEMS ONLY    */
+/* ================================================================ */
+
+#if defined(__DJGPP__) || defined(__GO32__)
+#  define CARES_SIZEOF_LONG           4
+#  define CARES_TYPEOF_ARES_SOCKLEN_T int
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+
+#elif defined(__SALFORDC__)
+#  define CARES_SIZEOF_LONG           4
+#  define CARES_TYPEOF_ARES_SOCKLEN_T int
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+
+#elif defined(__BORLANDC__)
+#  define CARES_SIZEOF_LONG           4
+#  define CARES_TYPEOF_ARES_SOCKLEN_T int
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+
+#elif defined(__TURBOC__)
+#  define CARES_SIZEOF_LONG           4
+#  define CARES_TYPEOF_ARES_SOCKLEN_T int
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+
+#elif defined(__WATCOMC__)
+#  define CARES_SIZEOF_LONG           4
+#  define CARES_TYPEOF_ARES_SOCKLEN_T int
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+
+#elif defined(__POCC__)
+#  define CARES_SIZEOF_LONG           4
+#  define CARES_TYPEOF_ARES_SOCKLEN_T int
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+
+#elif defined(__LCC__)
+#  define CARES_SIZEOF_LONG           4
+#  define CARES_TYPEOF_ARES_SOCKLEN_T int
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+
+#elif defined(__SYMBIAN32__)
+#  define CARES_SIZEOF_LONG           4
+#  define CARES_TYPEOF_ARES_SOCKLEN_T unsigned int
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+
+#elif defined(__MWERKS__)
+#  define CARES_SIZEOF_LONG           4
+#  define CARES_TYPEOF_ARES_SOCKLEN_T int
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+
+#elif defined(_WIN32_WCE)
+#  define CARES_SIZEOF_LONG           4
+#  define CARES_TYPEOF_ARES_SOCKLEN_T int
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+
+#elif defined(__MINGW32__)
+#  define CARES_SIZEOF_LONG           4
+#  define CARES_TYPEOF_ARES_SOCKLEN_T int
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+
+#elif defined(__VMS)
+#  define CARES_SIZEOF_LONG           4
+#  define CARES_TYPEOF_ARES_SOCKLEN_T unsigned int
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+
+#elif defined(__OS400__)
+#  if defined(__ILEC400__)
+#    define CARES_SIZEOF_LONG           4
+#    define CARES_TYPEOF_ARES_SOCKLEN_T socklen_t
+#    define CARES_SIZEOF_ARES_SOCKLEN_T 4
+#    define CARES_PULL_SYS_TYPES_H      1
+#    define CARES_PULL_SYS_SOCKET_H     1
+#  endif
+
+#elif defined(__MVS__)
+#  if defined(__IBMC__) || defined(__IBMCPP__)
+#    if defined(_ILP32)
+#      define CARES_SIZEOF_LONG           4
+#    elif defined(_LP64)
+#      define CARES_SIZEOF_LONG           8
+#    endif
+#    define CARES_TYPEOF_ARES_SOCKLEN_T socklen_t
+#    define CARES_SIZEOF_ARES_SOCKLEN_T 4
+#    define CARES_PULL_SYS_TYPES_H      1
+#    define CARES_PULL_SYS_SOCKET_H     1
+#  endif
+
+#elif defined(__370__)
+#  if defined(__IBMC__) || defined(__IBMCPP__)
+#    if defined(_ILP32)
+#      define CARES_SIZEOF_LONG           4
+#    elif defined(_LP64)
+#      define CARES_SIZEOF_LONG           8
+#    endif
+#    define CARES_TYPEOF_ARES_SOCKLEN_T socklen_t
+#    define CARES_SIZEOF_ARES_SOCKLEN_T 4
+#    define CARES_PULL_SYS_TYPES_H      1
+#    define CARES_PULL_SYS_SOCKET_H     1
+#  endif
+
+#elif defined(TPF)
+#  define CARES_SIZEOF_LONG           8
+#  define CARES_TYPEOF_ARES_SOCKLEN_T int
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+
+/* ===================================== */
+/*    KEEP MSVC THE PENULTIMATE ENTRY    */
+/* ===================================== */
+
+#elif defined(_MSC_VER)
+#  define CARES_SIZEOF_LONG           4
+#  define CARES_TYPEOF_ARES_SOCKLEN_T int
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+
+/* ===================================== */
+/*    KEEP GENERIC GCC THE LAST ENTRY    */
+/* ===================================== */
+
+#elif defined(__GNUC__)
+#  if defined(__LP64__) || \
+        defined(__x86_64__) || defined(__ppc64__)
+#    define CARES_SIZEOF_LONG           8
+#  elif defined(__ILP32__) || \
+      defined(__i386__) || defined(__ppc__) || defined(__arm__)
+#    define CARES_SIZEOF_LONG           4
+#  endif
+#  define CARES_TYPEOF_ARES_SOCKLEN_T socklen_t
+#  define CARES_SIZEOF_ARES_SOCKLEN_T 4
+#  define CARES_PULL_SYS_TYPES_H      1
+#  define CARES_PULL_SYS_SOCKET_H     1
+
+#else
+#  error "Unknown non-configure build target!"
+   Error Compilation_aborted_Unknown_non_configure_build_target
+#endif
+
+/* CARES_PULL_SYS_TYPES_H is defined above when inclusion of header file  */
+/* sys/types.h is required here to properly make type definitions below.  */
+#ifdef CARES_PULL_SYS_TYPES_H
+#  include <sys/types.h>
+#endif
+
+/* CARES_PULL_SYS_SOCKET_H is defined above when inclusion of header file  */
+/* sys/socket.h is required here to properly make type definitions below.  */
+#ifdef CARES_PULL_SYS_SOCKET_H
+#  include <sys/socket.h>
+#endif
+
+/* Data type definition of ares_socklen_t. */
+
+#ifdef CARES_TYPEOF_ARES_SOCKLEN_T
+  typedef CARES_TYPEOF_ARES_SOCKLEN_T ares_socklen_t;
+#endif
+
+#endif /* __CARES_BUILD_H */
diff --git a/third_party/cares/cares b/third_party/cares/cares
new file mode 160000
index 0000000..7691f77
--- /dev/null
+++ b/third_party/cares/cares
@@ -0,0 +1 @@
+Subproject commit 7691f773af79bf75a62d1863fd0f13ebf9dc51b1
diff --git a/third_party/cares/cares.BUILD b/third_party/cares/cares.BUILD
new file mode 100644
index 0000000..48096aa
--- /dev/null
+++ b/third_party/cares/cares.BUILD
@@ -0,0 +1,94 @@
+cc_library(
+    name = "ares",
+    srcs = [
+        "cares/ares__close_sockets.c",
+        "cares/ares__get_hostent.c",
+        "cares/ares__read_line.c",
+        "cares/ares__timeval.c",
+        "cares/ares_cancel.c",
+        "cares/ares_create_query.c",
+        "cares/ares_data.c",
+        "cares/ares_destroy.c",
+        "cares/ares_expand_name.c",
+        "cares/ares_expand_string.c",
+        "cares/ares_fds.c",
+        "cares/ares_free_hostent.c",
+        "cares/ares_free_string.c",
+        "cares/ares_getenv.c",
+        "cares/ares_gethostbyaddr.c",
+        "cares/ares_gethostbyname.c",
+        "cares/ares_getnameinfo.c",
+        "cares/ares_getopt.c",
+        "cares/ares_getsock.c",
+        "cares/ares_init.c",
+        "cares/ares_library_init.c",
+        "cares/ares_llist.c",
+        "cares/ares_mkquery.c",
+        "cares/ares_nowarn.c",
+        "cares/ares_options.c",
+        "cares/ares_parse_a_reply.c",
+        "cares/ares_parse_aaaa_reply.c",
+        "cares/ares_parse_mx_reply.c",
+        "cares/ares_parse_naptr_reply.c",
+        "cares/ares_parse_ns_reply.c",
+        "cares/ares_parse_ptr_reply.c",
+        "cares/ares_parse_soa_reply.c",
+        "cares/ares_parse_srv_reply.c",
+        "cares/ares_parse_txt_reply.c",
+        "cares/ares_platform.c",
+        "cares/ares_process.c",
+        "cares/ares_query.c",
+        "cares/ares_search.c",
+        "cares/ares_send.c",
+        "cares/ares_strcasecmp.c",
+        "cares/ares_strdup.c",
+        "cares/ares_strerror.c",
+        "cares/ares_timeout.c",
+        "cares/ares_version.c",
+        "cares/ares_writev.c",
+        "cares/bitncmp.c",
+        "cares/inet_net_pton.c",
+        "cares/inet_ntop.c",
+        "cares/windows_port.c",
+    ],
+    hdrs = [
+        "ares_build.h",
+        "config_linux/ares_config.h",
+        "cares/ares.h",
+        "cares/ares_data.h",
+        "cares/ares_dns.h",
+        "cares/ares_getenv.h",
+        "cares/ares_getopt.h",
+        "cares/ares_inet_net_pton.h",
+        "cares/ares_iphlpapi.h",
+        "cares/ares_ipv6.h",
+        "cares/ares_library_init.h",
+        "cares/ares_llist.h",
+        "cares/ares_nowarn.h",
+        "cares/ares_platform.h",
+        "cares/ares_private.h",
+        "cares/ares_rules.h",
+        "cares/ares_setup.h",
+        "cares/ares_strcasecmp.h",
+        "cares/ares_strdup.h",
+        "cares/ares_version.h",
+        "cares/bitncmp.h",
+        "cares/config-win32.h",
+        "cares/setup_once.h",
+    ],
+    includes = [
+        ".",
+        "config_linux",
+        "cares",
+    ],
+    linkstatic = 1,
+    visibility = [
+        "//visibility:public",
+    ],
+    copts = [
+        "-D_GNU_SOURCE",
+        "-D_HAS_EXCEPTIONS=0",
+        "-DNOMINMAX",
+        "-DHAVE_CONFIG_H",
+    ],
+)
diff --git a/third_party/cares/config_darwin/ares_config.h b/third_party/cares/config_darwin/ares_config.h
new file mode 100644
index 0000000..0f5bd4b
--- /dev/null
+++ b/third_party/cares/config_darwin/ares_config.h
@@ -0,0 +1,523 @@
+/* ares_config.h.  Generated from ares_config.h.in by configure.  */
+/* ares_config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Define if building universal (internal helper macro) */
+/* #undef AC_APPLE_UNIVERSAL_BUILD */
+
+/* define this if ares is built for a big endian system */
+/* #undef ARES_BIG_ENDIAN */
+
+/* when building as static part of libcurl */
+/* #undef BUILDING_LIBCURL */
+
+/* Defined for build that exposes internal static functions for testing. */
+/* #undef CARES_EXPOSE_STATICS */
+
+/* Defined for build with symbol hiding. */
+#define CARES_SYMBOL_HIDING 1
+
+/* Definition to make a library symbol externally visible. */
+#define CARES_SYMBOL_SCOPE_EXTERN __attribute__ ((__visibility__ ("default")))
+
+/* Use resolver library to configure cares */
+/* #undef CARES_USE_LIBRESOLV */
+
+/* if a /etc/inet dir is being used */
+/* #undef ETC_INET */
+
+/* Define to the type of arg 2 for gethostname. */
+#define GETHOSTNAME_TYPE_ARG2 size_t
+
+/* Define to the type qualifier of arg 1 for getnameinfo. */
+#define GETNAMEINFO_QUAL_ARG1 const
+
+/* Define to the type of arg 1 for getnameinfo. */
+#define GETNAMEINFO_TYPE_ARG1 struct sockaddr *
+
+/* Define to the type of arg 2 for getnameinfo. */
+#define GETNAMEINFO_TYPE_ARG2 socklen_t
+
+/* Define to the type of args 4 and 6 for getnameinfo. */
+#define GETNAMEINFO_TYPE_ARG46 socklen_t
+
+/* Define to the type of arg 7 for getnameinfo. */
+#define GETNAMEINFO_TYPE_ARG7 int
+
+/* Specifies the number of arguments to getservbyport_r */
+/* #undef GETSERVBYPORT_R_ARGS */
+
+/* Specifies the size of the buffer to pass to getservbyport_r */
+/* #undef GETSERVBYPORT_R_BUFSIZE */
+
+/* Define to 1 if you have AF_INET6. */
+#define HAVE_AF_INET6 1
+
+/* Define to 1 if you have the <arpa/inet.h> header file. */
+#define HAVE_ARPA_INET_H 1
+
+/* Define to 1 if you have the <arpa/nameser_compat.h> header file. */
+#define HAVE_ARPA_NAMESER_COMPAT_H 1
+
+/* Define to 1 if you have the <arpa/nameser.h> header file. */
+#define HAVE_ARPA_NAMESER_H 1
+
+/* Define to 1 if you have the <assert.h> header file. */
+#define HAVE_ASSERT_H 1
+
+/* Define to 1 if you have the `bitncmp' function. */
+/* #undef HAVE_BITNCMP */
+
+/* Define to 1 if bool is an available type. */
+#define HAVE_BOOL_T 1
+
+/* Define to 1 if you have the clock_gettime function and monotonic timer. */
+/* #undef HAVE_CLOCK_GETTIME_MONOTONIC */
+
+/* Define to 1 if you have the closesocket function. */
+/* #undef HAVE_CLOSESOCKET */
+
+/* Define to 1 if you have the CloseSocket camel case function. */
+/* #undef HAVE_CLOSESOCKET_CAMEL */
+
+/* Define to 1 if you have the connect function. */
+#define HAVE_CONNECT 1
+
+/* define if the compiler supports basic C++11 syntax */
+#define HAVE_CXX11 1
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#define HAVE_DLFCN_H 1
+
+/* Define to 1 if you have the <errno.h> header file. */
+#define HAVE_ERRNO_H 1
+
+/* Define to 1 if you have the fcntl function. */
+#define HAVE_FCNTL 1
+
+/* Define to 1 if you have the <fcntl.h> header file. */
+#define HAVE_FCNTL_H 1
+
+/* Define to 1 if you have a working fcntl O_NONBLOCK function. */
+#define HAVE_FCNTL_O_NONBLOCK 1
+
+/* Define to 1 if you have the freeaddrinfo function. */
+#define HAVE_FREEADDRINFO 1
+
+/* Define to 1 if you have a working getaddrinfo function. */
+#define HAVE_GETADDRINFO 1
+
+/* Define to 1 if the getaddrinfo function is threadsafe. */
+#define HAVE_GETADDRINFO_THREADSAFE 1
+
+/* Define to 1 if you have the getenv function. */
+#define HAVE_GETENV 1
+
+/* Define to 1 if you have the gethostbyaddr function. */
+#define HAVE_GETHOSTBYADDR 1
+
+/* Define to 1 if you have the gethostbyname function. */
+#define HAVE_GETHOSTBYNAME 1
+
+/* Define to 1 if you have the gethostname function. */
+#define HAVE_GETHOSTNAME 1
+
+/* Define to 1 if you have the getnameinfo function. */
+#define HAVE_GETNAMEINFO 1
+
+/* Define to 1 if you have the getservbyport_r function. */
+/* #undef HAVE_GETSERVBYPORT_R */
+
+/* Define to 1 if you have the `gettimeofday' function. */
+#define HAVE_GETTIMEOFDAY 1
+
+/* Define to 1 if you have the `if_indextoname' function. */
+#define HAVE_IF_INDEXTONAME 1
+
+/* Define to 1 if you have a IPv6 capable working inet_net_pton function. */
+#define HAVE_INET_NET_PTON 1
+
+/* Define to 1 if you have a IPv6 capable working inet_ntop function. */
+#define HAVE_INET_NTOP 1
+
+/* Define to 1 if you have a IPv6 capable working inet_pton function. */
+#define HAVE_INET_PTON 1
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#define HAVE_INTTYPES_H 1
+
+/* Define to 1 if you have the ioctl function. */
+#define HAVE_IOCTL 1
+
+/* Define to 1 if you have the ioctlsocket function. */
+/* #undef HAVE_IOCTLSOCKET */
+
+/* Define to 1 if you have the IoctlSocket camel case function. */
+/* #undef HAVE_IOCTLSOCKET_CAMEL */
+
+/* Define to 1 if you have a working IoctlSocket camel case FIONBIO function.
+   */
+/* #undef HAVE_IOCTLSOCKET_CAMEL_FIONBIO */
+
+/* Define to 1 if you have a working ioctlsocket FIONBIO function. */
+/* #undef HAVE_IOCTLSOCKET_FIONBIO */
+
+/* Define to 1 if you have a working ioctl FIONBIO function. */
+#define HAVE_IOCTL_FIONBIO 1
+
+/* Define to 1 if you have a working ioctl SIOCGIFADDR function. */
+#define HAVE_IOCTL_SIOCGIFADDR 1
+
+/* Define to 1 if you have the `resolve' library (-lresolve). */
+/* #undef HAVE_LIBRESOLVE */
+
+/* Define to 1 if you have the <limits.h> header file. */
+#define HAVE_LIMITS_H 1
+
+/* if your compiler supports LL */
+#define HAVE_LL 1
+
+/* Define to 1 if the compiler supports the 'long long' data type. */
+#define HAVE_LONGLONG 1
+
+/* Define to 1 if you have the malloc.h header file. */
+/* #undef HAVE_MALLOC_H */
+
+/* Define to 1 if you have the memory.h header file. */
+#define HAVE_MEMORY_H 1
+
+/* Define to 1 if you have the MSG_NOSIGNAL flag. */
+/* #undef HAVE_MSG_NOSIGNAL */
+
+/* Define to 1 if you have the <netdb.h> header file. */
+#define HAVE_NETDB_H 1
+
+/* Define to 1 if you have the <netinet/in.h> header file. */
+#define HAVE_NETINET_IN_H 1
+
+/* Define to 1 if you have the <netinet/tcp.h> header file. */
+#define HAVE_NETINET_TCP_H 1
+
+/* Define to 1 if you have the <net/if.h> header file. */
+#define HAVE_NET_IF_H 1
+
+/* Define to 1 if you have PF_INET6. */
+#define HAVE_PF_INET6 1
+
+/* Define to 1 if you have the recv function. */
+#define HAVE_RECV 1
+
+/* Define to 1 if you have the recvfrom function. */
+#define HAVE_RECVFROM 1
+
+/* Define to 1 if you have the send function. */
+#define HAVE_SEND 1
+
+/* Define to 1 if you have the setsockopt function. */
+#define HAVE_SETSOCKOPT 1
+
+/* Define to 1 if you have a working setsockopt SO_NONBLOCK function. */
+/* #undef HAVE_SETSOCKOPT_SO_NONBLOCK */
+
+/* Define to 1 if you have the <signal.h> header file. */
+#define HAVE_SIGNAL_H 1
+
+/* Define to 1 if sig_atomic_t is an available typedef. */
+#define HAVE_SIG_ATOMIC_T 1
+
+/* Define to 1 if sig_atomic_t is already defined as volatile. */
+/* #undef HAVE_SIG_ATOMIC_T_VOLATILE */
+
+/* Define to 1 if your struct sockaddr_in6 has sin6_scope_id. */
+#define HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID 1
+
+/* Define to 1 if you have the socket function. */
+#define HAVE_SOCKET 1
+
+/* Define to 1 if you have the <socket.h> header file. */
+/* #undef HAVE_SOCKET_H */
+
+/* Define to 1 if you have the <stdbool.h> header file. */
+#define HAVE_STDBOOL_H 1
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#define HAVE_STDINT_H 1
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#define HAVE_STDLIB_H 1
+
+/* Define to 1 if you have the strcasecmp function. */
+#define HAVE_STRCASECMP 1
+
+/* Define to 1 if you have the strcmpi function. */
+/* #undef HAVE_STRCMPI */
+
+/* Define to 1 if you have the strdup function. */
+#define HAVE_STRDUP 1
+
+/* Define to 1 if you have the stricmp function. */
+/* #undef HAVE_STRICMP */
+
+/* Define to 1 if you have the <strings.h> header file. */
+#define HAVE_STRINGS_H 1
+
+/* Define to 1 if you have the <string.h> header file. */
+#define HAVE_STRING_H 1
+
+/* Define to 1 if you have the strncasecmp function. */
+#define HAVE_STRNCASECMP 1
+
+/* Define to 1 if you have the strncmpi function. */
+/* #undef HAVE_STRNCMPI */
+
+/* Define to 1 if you have the strnicmp function. */
+/* #undef HAVE_STRNICMP */
+
+/* Define to 1 if you have the <stropts.h> header file. */
+/* #undef HAVE_STROPTS_H */
+
+/* Define to 1 if you have struct addrinfo. */
+#define HAVE_STRUCT_ADDRINFO 1
+
+/* Define to 1 if you have struct in6_addr. */
+#define HAVE_STRUCT_IN6_ADDR 1
+
+/* Define to 1 if you have struct sockaddr_in6. */
+#define HAVE_STRUCT_SOCKADDR_IN6 1
+
+/* if struct sockaddr_storage is defined */
+#define HAVE_STRUCT_SOCKADDR_STORAGE 1
+
+/* Define to 1 if you have the timeval struct. */
+#define HAVE_STRUCT_TIMEVAL 1
+
+/* Define to 1 if you have the <sys/ioctl.h> header file. */
+#define HAVE_SYS_IOCTL_H 1
+
+/* Define to 1 if you have the <sys/param.h> header file. */
+#define HAVE_SYS_PARAM_H 1
+
+/* Define to 1 if you have the <sys/select.h> header file. */
+#define HAVE_SYS_SELECT_H 1
+
+/* Define to 1 if you have the <sys/socket.h> header file. */
+#define HAVE_SYS_SOCKET_H 1
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#define HAVE_SYS_STAT_H 1
+
+/* Define to 1 if you have the <sys/time.h> header file. */
+#define HAVE_SYS_TIME_H 1
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#define HAVE_SYS_TYPES_H 1
+
+/* Define to 1 if you have the <sys/uio.h> header file. */
+#define HAVE_SYS_UIO_H 1
+
+/* Define to 1 if you have the <time.h> header file. */
+#define HAVE_TIME_H 1
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#define HAVE_UNISTD_H 1
+
+/* Define to 1 if you have the windows.h header file. */
+/* #undef HAVE_WINDOWS_H */
+
+/* Define to 1 if you have the winsock2.h header file. */
+/* #undef HAVE_WINSOCK2_H */
+
+/* Define to 1 if you have the winsock.h header file. */
+/* #undef HAVE_WINSOCK_H */
+
+/* Define to 1 if you have the writev function. */
+#define HAVE_WRITEV 1
+
+/* Define to 1 if you have the ws2tcpip.h header file. */
+/* #undef HAVE_WS2TCPIP_H */
+
+/* Define to the sub-directory where libtool stores uninstalled libraries. */
+#define LT_OBJDIR ".libs/"
+
+/* Define to 1 if you need the malloc.h header file even with stdlib.h */
+/* #undef NEED_MALLOC_H */
+
+/* Define to 1 if you need the memory.h header file even with stdlib.h */
+/* #undef NEED_MEMORY_H */
+
+/* Define to 1 if _REENTRANT preprocessor symbol must be defined. */
+/* #undef NEED_REENTRANT */
+
+/* Define to 1 if _THREAD_SAFE preprocessor symbol must be defined. */
+/* #undef NEED_THREAD_SAFE */
+
+/* cpu-machine-OS */
+#define OS "i386-apple-darwin9.8.0"
+
+/* Name of package */
+#define PACKAGE "c-ares"
+
+/* Define to the address where bug reports for this package should be sent. */
+#define PACKAGE_BUGREPORT "c-ares mailing list: http://cool.haxx.se/mailman/listinfo/c-ares"
+
+/* Define to the full name of this package. */
+#define PACKAGE_NAME "c-ares"
+
+/* Define to the full name and version of this package. */
+#define PACKAGE_STRING "c-ares -"
+
+/* Define to the one symbol short name of this package. */
+#define PACKAGE_TARNAME "c-ares"
+
+/* Define to the home page for this package. */
+#define PACKAGE_URL ""
+
+/* Define to the version of this package. */
+#define PACKAGE_VERSION "-"
+
+/* a suitable file/device to read random data from */
+#define RANDOM_FILE "/dev/urandom"
+
+/* Define to the type qualifier pointed by arg 5 for recvfrom. */
+#define RECVFROM_QUAL_ARG5
+
+/* Define to the type of arg 1 for recvfrom. */
+#define RECVFROM_TYPE_ARG1 int
+
+/* Define to the type pointed by arg 2 for recvfrom. */
+#define RECVFROM_TYPE_ARG2 void
+
+/* Define to 1 if the type pointed by arg 2 for recvfrom is void. */
+#define RECVFROM_TYPE_ARG2_IS_VOID 1
+
+/* Define to the type of arg 3 for recvfrom. */
+#define RECVFROM_TYPE_ARG3 size_t
+
+/* Define to the type of arg 4 for recvfrom. */
+#define RECVFROM_TYPE_ARG4 int
+
+/* Define to the type pointed by arg 5 for recvfrom. */
+#define RECVFROM_TYPE_ARG5 struct sockaddr
+
+/* Define to 1 if the type pointed by arg 5 for recvfrom is void. */
+/* #undef RECVFROM_TYPE_ARG5_IS_VOID */
+
+/* Define to the type pointed by arg 6 for recvfrom. */
+#define RECVFROM_TYPE_ARG6 socklen_t
+
+/* Define to 1 if the type pointed by arg 6 for recvfrom is void. */
+/* #undef RECVFROM_TYPE_ARG6_IS_VOID */
+
+/* Define to the function return type for recvfrom. */
+#define RECVFROM_TYPE_RETV ssize_t
+
+/* Define to the type of arg 1 for recv. */
+#define RECV_TYPE_ARG1 int
+
+/* Define to the type of arg 2 for recv. */
+#define RECV_TYPE_ARG2 void *
+
+/* Define to the type of arg 3 for recv. */
+#define RECV_TYPE_ARG3 size_t
+
+/* Define to the type of arg 4 for recv. */
+#define RECV_TYPE_ARG4 int
+
+/* Define to the function return type for recv. */
+#define RECV_TYPE_RETV ssize_t
+
+/* Define as the return type of signal handlers (`int' or `void'). */
+#define RETSIGTYPE void
+
+/* Define to the type qualifier of arg 2 for send. */
+#define SEND_QUAL_ARG2 const
+
+/* Define to the type of arg 1 for send. */
+#define SEND_TYPE_ARG1 int
+
+/* Define to the type of arg 2 for send. */
+#define SEND_TYPE_ARG2 void *
+
+/* Define to the type of arg 3 for send. */
+#define SEND_TYPE_ARG3 size_t
+
+/* Define to the type of arg 4 for send. */
+#define SEND_TYPE_ARG4 int
+
+/* Define to the function return type for send. */
+#define SEND_TYPE_RETV ssize_t
+
+/* The size of `int', as computed by sizeof. */
+#define SIZEOF_INT 4
+
+/* The size of `long', as computed by sizeof. */
+#define SIZEOF_LONG 4
+
+/* The size of `short', as computed by sizeof. */
+#define SIZEOF_SHORT 2
+
+/* The size of `size_t', as computed by sizeof. */
+#define SIZEOF_SIZE_T 4
+
+/* The size of `struct in6_addr', as computed by sizeof. */
+#define SIZEOF_STRUCT_IN6_ADDR 16
+
+/* The size of `struct in_addr', as computed by sizeof. */
+#define SIZEOF_STRUCT_IN_ADDR 4
+
+/* The size of `time_t', as computed by sizeof. */
+#define SIZEOF_TIME_T 4
+
+/* Define to 1 if you have the ANSI C header files. */
+#define STDC_HEADERS 1
+
+/* Define to 1 if you can safely include both <sys/time.h> and <time.h>. */
+#define TIME_WITH_SYS_TIME 1
+
+/* Define to disable non-blocking sockets. */
+/* #undef USE_BLOCKING_SOCKETS */
+
+/* Version number of package */
+#define VERSION "-"
+
+/* Define to avoid automatic inclusion of winsock.h */
+/* #undef WIN32_LEAN_AND_MEAN */
+
+/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
+   significant byte first (like Motorola and SPARC, unlike Intel). */
+#if defined AC_APPLE_UNIVERSAL_BUILD
+# if defined __BIG_ENDIAN__
+#  define WORDS_BIGENDIAN 1
+# endif
+#else
+# ifndef WORDS_BIGENDIAN
+/* #  undef WORDS_BIGENDIAN */
+# endif
+#endif
+
+/* Define to 1 if OS is AIX. */
+#ifndef _ALL_SOURCE
+/* #  undef _ALL_SOURCE */
+#endif
+
+/* Enable large inode numbers on Mac OS X 10.5.  */
+#ifndef _DARWIN_USE_64_BIT_INODE
+# define _DARWIN_USE_64_BIT_INODE 1
+#endif
+
+/* Number of bits in a file offset, on hosts where this is settable. */
+/* #undef _FILE_OFFSET_BITS */
+
+/* Define for large files, on AIX-style hosts. */
+/* #undef _LARGE_FILES */
+
+/* Define to empty if `const' does not conform to ANSI C. */
+/* #undef const */
+
+/* Type to use in place of in_addr_t when system does not provide it. */
+/* #undef in_addr_t */
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+/* #undef size_t */
+
+/* the signed version of size_t */
+/* #undef ssize_t */
diff --git a/third_party/cares/config_linux/ares_config.h b/third_party/cares/config_linux/ares_config.h
new file mode 100644
index 0000000..265974c
--- /dev/null
+++ b/third_party/cares/config_linux/ares_config.h
@@ -0,0 +1,524 @@
+/* ares_config.h.  Generated from ares_config.h.in by configure.  */
+/* ares_config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Define if building universal (internal helper macro) */
+/* #undef AC_APPLE_UNIVERSAL_BUILD */
+
+/* define this if ares is built for a big endian system */
+/* #undef ARES_BIG_ENDIAN */
+
+/* when building as static part of libcurl */
+/* #undef BUILDING_LIBCURL */
+
+/* Defined for build that exposes internal static functions for testing. */
+/* #undef CARES_EXPOSE_STATICS */
+
+/* Defined for build with symbol hiding. */
+#define CARES_SYMBOL_HIDING 1
+
+/* Definition to make a library symbol externally visible. */
+#define CARES_SYMBOL_SCOPE_EXTERN __attribute__ ((__visibility__ ("default")))
+
+/* Use resolver library to configure cares */
+/* #undef CARES_USE_LIBRESOLV */
+
+/* if a /etc/inet dir is being used */
+/* #undef ETC_INET */
+
+/* Define to the type of arg 2 for gethostname. */
+#define GETHOSTNAME_TYPE_ARG2 size_t
+
+/* Define to the type qualifier of arg 1 for getnameinfo. */
+#define GETNAMEINFO_QUAL_ARG1 const
+
+/* Define to the type of arg 1 for getnameinfo. */
+#define GETNAMEINFO_TYPE_ARG1 struct sockaddr *
+
+/* Define to the type of arg 2 for getnameinfo. */
+#define GETNAMEINFO_TYPE_ARG2 socklen_t
+
+/* Define to the type of args 4 and 6 for getnameinfo. */
+#define GETNAMEINFO_TYPE_ARG46 socklen_t
+
+/* Define to the type of arg 7 for getnameinfo. */
+#define GETNAMEINFO_TYPE_ARG7 int
+
+/* Specifies the number of arguments to getservbyport_r */
+#define GETSERVBYPORT_R_ARGS 6
+
+/* Specifies the size of the buffer to pass to getservbyport_r */
+#define GETSERVBYPORT_R_BUFSIZE 4096
+
+/* Define to 1 if you have AF_INET6. */
+#define HAVE_AF_INET6 1
+
+/* Define to 1 if you have the <arpa/inet.h> header file. */
+#define HAVE_ARPA_INET_H 1
+
+/* Define to 1 if you have the <arpa/nameser_compat.h> header file. */
+#define HAVE_ARPA_NAMESER_COMPAT_H 1
+
+/* Define to 1 if you have the <arpa/nameser.h> header file. */
+#define HAVE_ARPA_NAMESER_H 1
+
+/* Define to 1 if you have the <assert.h> header file. */
+#define HAVE_ASSERT_H 1
+
+/* Define to 1 if you have the `bitncmp' function. */
+/* #undef HAVE_BITNCMP */
+
+/* Define to 1 if bool is an available type. */
+#define HAVE_BOOL_T 1
+
+/* Define to 1 if you have the clock_gettime function and monotonic timer. */
+#define HAVE_CLOCK_GETTIME_MONOTONIC 1
+
+/* Define to 1 if you have the closesocket function. */
+/* #undef HAVE_CLOSESOCKET */
+
+/* Define to 1 if you have the CloseSocket camel case function. */
+/* #undef HAVE_CLOSESOCKET_CAMEL */
+
+/* Define to 1 if you have the connect function. */
+#define HAVE_CONNECT 1
+
+/* define if the compiler supports basic C++11 syntax */
+#define HAVE_CXX11 1
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#define HAVE_DLFCN_H 1
+
+/* Define to 1 if you have the <errno.h> header file. */
+#define HAVE_ERRNO_H 1
+
+/* Define to 1 if you have the fcntl function. */
+#define HAVE_FCNTL 1
+
+/* Define to 1 if you have the <fcntl.h> header file. */
+#define HAVE_FCNTL_H 1
+
+/* Define to 1 if you have a working fcntl O_NONBLOCK function. */
+#define HAVE_FCNTL_O_NONBLOCK 1
+
+/* Define to 1 if you have the freeaddrinfo function. */
+#define HAVE_FREEADDRINFO 1
+
+/* Define to 1 if you have a working getaddrinfo function. */
+#define HAVE_GETADDRINFO 1
+
+/* Define to 1 if the getaddrinfo function is threadsafe. */
+#define HAVE_GETADDRINFO_THREADSAFE 1
+
+/* Define to 1 if you have the getenv function. */
+#define HAVE_GETENV 1
+
+/* Define to 1 if you have the gethostbyaddr function. */
+#define HAVE_GETHOSTBYADDR 1
+
+/* Define to 1 if you have the gethostbyname function. */
+#define HAVE_GETHOSTBYNAME 1
+
+/* Define to 1 if you have the gethostname function. */
+#define HAVE_GETHOSTNAME 1
+
+/* Define to 1 if you have the getnameinfo function. */
+#define HAVE_GETNAMEINFO 1
+
+/* Define to 1 if you have the getservbyport_r function. */
+#define HAVE_GETSERVBYPORT_R 1
+
+/* Define to 1 if you have the `gettimeofday' function. */
+#define HAVE_GETTIMEOFDAY 1
+
+/* Define to 1 if you have the `if_indextoname' function. */
+#define HAVE_IF_INDEXTONAME 1
+
+/* Define to 1 if you have a IPv6 capable working inet_net_pton function. */
+/* #undef HAVE_INET_NET_PTON */
+
+/* Define to 1 if you have a IPv6 capable working inet_ntop function. */
+#define HAVE_INET_NTOP 1
+
+/* Define to 1 if you have a IPv6 capable working inet_pton function. */
+#define HAVE_INET_PTON 1
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#define HAVE_INTTYPES_H 1
+
+/* Define to 1 if you have the ioctl function. */
+#define HAVE_IOCTL 1
+
+/* Define to 1 if you have the ioctlsocket function. */
+/* #undef HAVE_IOCTLSOCKET */
+
+/* Define to 1 if you have the IoctlSocket camel case function. */
+/* #undef HAVE_IOCTLSOCKET_CAMEL */
+
+/* Define to 1 if you have a working IoctlSocket camel case FIONBIO function.
+   */
+/* #undef HAVE_IOCTLSOCKET_CAMEL_FIONBIO */
+
+/* Define to 1 if you have a working ioctlsocket FIONBIO function. */
+/* #undef HAVE_IOCTLSOCKET_FIONBIO */
+
+/* Define to 1 if you have a working ioctl FIONBIO function. */
+#define HAVE_IOCTL_FIONBIO 1
+
+/* Define to 1 if you have a working ioctl SIOCGIFADDR function. */
+#define HAVE_IOCTL_SIOCGIFADDR 1
+
+/* Define to 1 if you have the `resolve' library (-lresolve). */
+/* #undef HAVE_LIBRESOLVE */
+
+/* Define to 1 if you have the <limits.h> header file. */
+#define HAVE_LIMITS_H 1
+
+/* if your compiler supports LL */
+#define HAVE_LL 1
+
+/* Define to 1 if the compiler supports the 'long long' data type. */
+#define HAVE_LONGLONG 1
+
+/* Define to 1 if you have the malloc.h header file. */
+#define HAVE_MALLOC_H 1
+
+/* Define to 1 if you have the memory.h header file. */
+#define HAVE_MEMORY_H 1
+
+/* Define to 1 if you have the MSG_NOSIGNAL flag. */
+#define HAVE_MSG_NOSIGNAL 1
+
+/* Define to 1 if you have the <netdb.h> header file. */
+#define HAVE_NETDB_H 1
+
+/* Define to 1 if you have the <netinet/in.h> header file. */
+#define HAVE_NETINET_IN_H 1
+
+/* Define to 1 if you have the <netinet/tcp.h> header file. */
+#define HAVE_NETINET_TCP_H 1
+
+/* Define to 1 if you have the <net/if.h> header file. */
+#define HAVE_NET_IF_H 1
+
+/* Define to 1 if you have PF_INET6. */
+#define HAVE_PF_INET6 1
+
+/* Define to 1 if you have the recv function. */
+#define HAVE_RECV 1
+
+/* Define to 1 if you have the recvfrom function. */
+#define HAVE_RECVFROM 1
+
+/* Define to 1 if you have the send function. */
+#define HAVE_SEND 1
+
+/* Define to 1 if you have the setsockopt function. */
+#define HAVE_SETSOCKOPT 1
+
+/* Define to 1 if you have a working setsockopt SO_NONBLOCK function. */
+/* #undef HAVE_SETSOCKOPT_SO_NONBLOCK */
+
+/* Define to 1 if you have the <signal.h> header file. */
+#define HAVE_SIGNAL_H 1
+
+/* Define to 1 if sig_atomic_t is an available typedef. */
+#define HAVE_SIG_ATOMIC_T 1
+
+/* Define to 1 if sig_atomic_t is already defined as volatile. */
+/* #undef HAVE_SIG_ATOMIC_T_VOLATILE */
+
+/* Define to 1 if your struct sockaddr_in6 has sin6_scope_id. */
+#define HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID 1
+
+/* Define to 1 if you have the socket function. */
+#define HAVE_SOCKET 1
+
+/* Define to 1 if you have the <socket.h> header file. */
+/* #undef HAVE_SOCKET_H */
+
+/* Define to 1 if you have the <stdbool.h> header file. */
+#define HAVE_STDBOOL_H 1
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#define HAVE_STDINT_H 1
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#define HAVE_STDLIB_H 1
+
+/* Define to 1 if you have the strcasecmp function. */
+#define HAVE_STRCASECMP 1
+
+/* Define to 1 if you have the strcmpi function. */
+/* #undef HAVE_STRCMPI */
+
+/* Define to 1 if you have the strdup function. */
+#define HAVE_STRDUP 1
+
+/* Define to 1 if you have the stricmp function. */
+/* #undef HAVE_STRICMP */
+
+/* Define to 1 if you have the <strings.h> header file. */
+#define HAVE_STRINGS_H 1
+
+/* Define to 1 if you have the <string.h> header file. */
+#define HAVE_STRING_H 1
+
+/* Define to 1 if you have the strncasecmp function. */
+#define HAVE_STRNCASECMP 1
+
+/* Define to 1 if you have the strncmpi function. */
+/* #undef HAVE_STRNCMPI */
+
+/* Define to 1 if you have the strnicmp function. */
+/* #undef HAVE_STRNICMP */
+
+/* Define to 1 if you have the <stropts.h> header file. */
+#define HAVE_STROPTS_H 1
+
+/* Define to 1 if you have struct addrinfo. */
+#define HAVE_STRUCT_ADDRINFO 1
+
+/* Define to 1 if you have struct in6_addr. */
+#define HAVE_STRUCT_IN6_ADDR 1
+
+/* Define to 1 if you have struct sockaddr_in6. */
+#define HAVE_STRUCT_SOCKADDR_IN6 1
+
+/* if struct sockaddr_storage is defined */
+#define HAVE_STRUCT_SOCKADDR_STORAGE 1
+
+/* Define to 1 if you have the timeval struct. */
+#define HAVE_STRUCT_TIMEVAL 1
+
+/* Define to 1 if you have the <sys/ioctl.h> header file. */
+#define HAVE_SYS_IOCTL_H 1
+
+/* Define to 1 if you have the <sys/param.h> header file. */
+#define HAVE_SYS_PARAM_H 1
+
+/* Define to 1 if you have the <sys/select.h> header file. */
+#define HAVE_SYS_SELECT_H 1
+
+/* Define to 1 if you have the <sys/socket.h> header file. */
+#define HAVE_SYS_SOCKET_H 1
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#define HAVE_SYS_STAT_H 1
+
+/* Define to 1 if you have the <sys/time.h> header file. */
+#define HAVE_SYS_TIME_H 1
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#define HAVE_SYS_TYPES_H 1
+
+/* Define to 1 if you have the <sys/uio.h> header file. */
+#define HAVE_SYS_UIO_H 1
+
+/* Define to 1 if you have the <time.h> header file. */
+#define HAVE_TIME_H 1
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#define HAVE_UNISTD_H 1
+
+/* Define to 1 if you have the windows.h header file. */
+/* #undef HAVE_WINDOWS_H */
+
+/* Define to 1 if you have the winsock2.h header file. */
+/* #undef HAVE_WINSOCK2_H */
+
+/* Define to 1 if you have the winsock.h header file. */
+/* #undef HAVE_WINSOCK_H */
+
+/* Define to 1 if you have the writev function. */
+#define HAVE_WRITEV 1
+
+/* Define to 1 if you have the ws2tcpip.h header file. */
+/* #undef HAVE_WS2TCPIP_H */
+
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#define LT_OBJDIR ".libs/"
+
+/* Define to 1 if you need the malloc.h header file even with stdlib.h */
+/* #undef NEED_MALLOC_H */
+
+/* Define to 1 if you need the memory.h header file even with stdlib.h */
+/* #undef NEED_MEMORY_H */
+
+/* Define to 1 if _REENTRANT preprocessor symbol must be defined. */
+/* #undef NEED_REENTRANT */
+
+/* Define to 1 if _THREAD_SAFE preprocessor symbol must be defined. */
+/* #undef NEED_THREAD_SAFE */
+
+/* cpu-machine-OS */
+#define OS "i386-unknown-linux-gnu"
+
+/* Name of package */
+#define PACKAGE "c-ares"
+
+/* Define to the address where bug reports for this package should be sent. */
+#define PACKAGE_BUGREPORT "c-ares mailing list: http://cool.haxx.se/mailman/listinfo/c-ares"
+
+/* Define to the full name of this package. */
+#define PACKAGE_NAME "c-ares"
+
+/* Define to the full name and version of this package. */
+#define PACKAGE_STRING "c-ares -"
+
+/* Define to the one symbol short name of this package. */
+#define PACKAGE_TARNAME "c-ares"
+
+/* Define to the home page for this package. */
+#define PACKAGE_URL ""
+
+/* Define to the version of this package. */
+#define PACKAGE_VERSION "-"
+
+/* a suitable file/device to read random data from */
+#define RANDOM_FILE "/dev/urandom"
+
+/* Define to the type qualifier pointed by arg 5 for recvfrom. */
+#define RECVFROM_QUAL_ARG5 
+
+/* Define to the type of arg 1 for recvfrom. */
+#define RECVFROM_TYPE_ARG1 int
+
+/* Define to the type pointed by arg 2 for recvfrom. */
+#define RECVFROM_TYPE_ARG2 void
+
+/* Define to 1 if the type pointed by arg 2 for recvfrom is void. */
+#define RECVFROM_TYPE_ARG2_IS_VOID 1
+
+/* Define to the type of arg 3 for recvfrom. */
+#define RECVFROM_TYPE_ARG3 size_t
+
+/* Define to the type of arg 4 for recvfrom. */
+#define RECVFROM_TYPE_ARG4 int
+
+/* Define to the type pointed by arg 5 for recvfrom. */
+#define RECVFROM_TYPE_ARG5 struct sockaddr
+
+/* Define to 1 if the type pointed by arg 5 for recvfrom is void. */
+/* #undef RECVFROM_TYPE_ARG5_IS_VOID */
+
+/* Define to the type pointed by arg 6 for recvfrom. */
+#define RECVFROM_TYPE_ARG6 socklen_t
+
+/* Define to 1 if the type pointed by arg 6 for recvfrom is void. */
+/* #undef RECVFROM_TYPE_ARG6_IS_VOID */
+
+/* Define to the function return type for recvfrom. */
+#define RECVFROM_TYPE_RETV ssize_t
+
+/* Define to the type of arg 1 for recv. */
+#define RECV_TYPE_ARG1 int
+
+/* Define to the type of arg 2 for recv. */
+#define RECV_TYPE_ARG2 void *
+
+/* Define to the type of arg 3 for recv. */
+#define RECV_TYPE_ARG3 size_t
+
+/* Define to the type of arg 4 for recv. */
+#define RECV_TYPE_ARG4 int
+
+/* Define to the function return type for recv. */
+#define RECV_TYPE_RETV ssize_t
+
+/* Define as the return type of signal handlers (`int' or `void'). */
+#define RETSIGTYPE void
+
+/* Define to the type qualifier of arg 2 for send. */
+#define SEND_QUAL_ARG2 const
+
+/* Define to the type of arg 1 for send. */
+#define SEND_TYPE_ARG1 int
+
+/* Define to the type of arg 2 for send. */
+#define SEND_TYPE_ARG2 void *
+
+/* Define to the type of arg 3 for send. */
+#define SEND_TYPE_ARG3 size_t
+
+/* Define to the type of arg 4 for send. */
+#define SEND_TYPE_ARG4 int
+
+/* Define to the function return type for send. */
+#define SEND_TYPE_RETV ssize_t
+
+/* The size of `int', as computed by sizeof. */
+#define SIZEOF_INT 4
+
+/* The size of `long', as computed by sizeof. */
+#define SIZEOF_LONG 4
+
+/* The size of `short', as computed by sizeof. */
+#define SIZEOF_SHORT 2
+
+/* The size of `size_t', as computed by sizeof. */
+#define SIZEOF_SIZE_T 4
+
+/* The size of `struct in6_addr', as computed by sizeof. */
+#define SIZEOF_STRUCT_IN6_ADDR 16
+
+/* The size of `struct in_addr', as computed by sizeof. */
+#define SIZEOF_STRUCT_IN_ADDR 4
+
+/* The size of `time_t', as computed by sizeof. */
+#define SIZEOF_TIME_T 4
+
+/* Define to 1 if you have the ANSI C header files. */
+#define STDC_HEADERS 1
+
+/* Define to 1 if you can safely include both <sys/time.h> and <time.h>. */
+#define TIME_WITH_SYS_TIME 1
+
+/* Define to disable non-blocking sockets. */
+/* #undef USE_BLOCKING_SOCKETS */
+
+/* Version number of package */
+#define VERSION "-"
+
+/* Define to avoid automatic inclusion of winsock.h */
+/* #undef WIN32_LEAN_AND_MEAN */
+
+/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
+   significant byte first (like Motorola and SPARC, unlike Intel). */
+#if defined AC_APPLE_UNIVERSAL_BUILD
+# if defined __BIG_ENDIAN__
+#  define WORDS_BIGENDIAN 1
+# endif
+#else
+# ifndef WORDS_BIGENDIAN
+/* #  undef WORDS_BIGENDIAN */
+# endif
+#endif
+
+/* Define to 1 if OS is AIX. */
+#ifndef _ALL_SOURCE
+/* #  undef _ALL_SOURCE */
+#endif
+
+/* Enable large inode numbers on Mac OS X 10.5.  */
+#ifndef _DARWIN_USE_64_BIT_INODE
+# define _DARWIN_USE_64_BIT_INODE 1
+#endif
+
+/* Number of bits in a file offset, on hosts where this is settable. */
+/* #undef _FILE_OFFSET_BITS */
+
+/* Define for large files, on AIX-style hosts. */
+/* #undef _LARGE_FILES */
+
+/* Define to empty if `const' does not conform to ANSI C. */
+/* #undef const */
+
+/* Type to use in place of in_addr_t when system does not provide it. */
+/* #undef in_addr_t */
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+/* #undef size_t */
+
+/* the signed version of size_t */
+/* #undef ssize_t */
diff --git a/tools/buildgen/generate_build_additions.sh b/tools/buildgen/generate_build_additions.sh
index a4373ed..9b5e211 100644
--- a/tools/buildgen/generate_build_additions.sh
+++ b/tools/buildgen/generate_build_additions.sh
@@ -35,6 +35,7 @@
   src/benchmark \
   src/proto            \
   src/zlib             \
+  src/c-ares           \
   test/core/bad_client \
   test/core/bad_ssl    \
   test/core/end2end    \
diff --git a/tools/buildgen/plugins/expand_bin_attrs.py b/tools/buildgen/plugins/expand_bin_attrs.py
index dc72bf3..f52168a 100755
--- a/tools/buildgen/plugins/expand_bin_attrs.py
+++ b/tools/buildgen/plugins/expand_bin_attrs.py
@@ -52,9 +52,11 @@
     tgt['ci_platforms'] = sorted(tgt.get('ci_platforms', tgt['platforms']))
     tgt['boringssl'] = tgt.get('boringssl', False)
     tgt['zlib'] = tgt.get('zlib', False)
+    tgt['ares'] = tgt.get('ares', False)
     tgt['gtest'] = tgt.get('gtest', False)
 
   libs = dictionary.get('libs')
   for lib in libs:
     lib['boringssl'] = lib.get('boringssl', False)
     lib['zlib'] = lib.get('zlib', False)
+    lib['ares'] = lib.get('ares', False)
diff --git a/tools/buildgen/plugins/expand_filegroups.py b/tools/buildgen/plugins/expand_filegroups.py
index 46739f8..9eaba46 100755
--- a/tools/buildgen/plugins/expand_filegroups.py
+++ b/tools/buildgen/plugins/expand_filegroups.py
@@ -57,6 +57,7 @@
   'language': 'c',
   'boringssl': False,
   'zlib': False,
+  'ares': False,
 }
 
 
diff --git a/tools/distrib/check_copyright.py b/tools/distrib/check_copyright.py
index 611a9f4..710e870 100755
--- a/tools/distrib/check_copyright.py
+++ b/tools/distrib/check_copyright.py
@@ -111,6 +111,8 @@
 
   # An older file originally from outside gRPC.
   'src/php/tests/bootstrap.php',
+  # census.proto copied from github
+  'tools/grpcz/census.proto',
 ))
 
 
@@ -125,7 +127,9 @@
 if args.precommit:
   FILE_LIST_COMMAND = 'git status -z | grep -Poz \'(?<=^[MARC][MARCD ] )[^\s]+\''
 else:
-  FILE_LIST_COMMAND = 'git ls-tree -r --name-only -r HEAD | grep -v ^third_party/'
+  FILE_LIST_COMMAND = 'git ls-tree -r --name-only -r HEAD | ' \
+                      'grep -v ^third_party/ |' \
+                      'grep -v "\(ares_config.h\|ares_build.h\)"'
 
 def load(name):
   with open(name) as f:
diff --git a/tools/distrib/python/grpcio_tools/setup.py b/tools/distrib/python/grpcio_tools/setup.py
index ed27f1f..211d442 100644
--- a/tools/distrib/python/grpcio_tools/setup.py
+++ b/tools/distrib/python/grpcio_tools/setup.py
@@ -203,6 +203,10 @@
 setuptools.setup(
   name='grpcio-tools',
   version=grpc_version.VERSION,
+  description='Protobuf code generator for gRPC',
+  author='The gRPC Authors',
+  author_email='grpc-io@googlegroups.com',
+  url='http://www.grpc.io',
   license='3-clause BSD',
   ext_modules=extension_modules(),
   packages=setuptools.find_packages('.'),
diff --git a/tools/dockerfile/grpc_artifact_python_manylinux_x64/Dockerfile b/tools/dockerfile/grpc_artifact_python_manylinux_x64/Dockerfile
index 7109862..06be7be 100644
--- a/tools/dockerfile/grpc_artifact_python_manylinux_x64/Dockerfile
+++ b/tools/dockerfile/grpc_artifact_python_manylinux_x64/Dockerfile
@@ -39,7 +39,7 @@
 RUN yum remove -y git
 RUN yum install -y curl-devel expat-devel gettext-devel openssl-devel zlib-devel gcc
 RUN cd /usr/src && \
-  wget https://kernel.org/pub/software/scm/git/git-2.0.5.tar.gz && \
+  curl -O -L https://kernel.org/pub/software/scm/git/git-2.0.5.tar.gz && \
   tar xzf git-2.0.5.tar.gz
 RUN cd /usr/src/git-2.0.5 && \
   make prefix=/usr/local/git all && \
diff --git a/tools/dockerfile/grpc_artifact_python_manylinux_x86/Dockerfile b/tools/dockerfile/grpc_artifact_python_manylinux_x86/Dockerfile
index 36286bc..8693e30 100644
--- a/tools/dockerfile/grpc_artifact_python_manylinux_x86/Dockerfile
+++ b/tools/dockerfile/grpc_artifact_python_manylinux_x86/Dockerfile
@@ -39,7 +39,7 @@
 RUN yum remove -y git
 RUN yum install -y curl-devel expat-devel gettext-devel openssl-devel zlib-devel gcc
 RUN cd /usr/src && \
-  wget https://kernel.org/pub/software/scm/git/git-2.0.5.tar.gz && \
+  curl -O -L https://kernel.org/pub/software/scm/git/git-2.0.5.tar.gz && \
   tar xzf git-2.0.5.tar.gz
 RUN cd /usr/src/git-2.0.5 && \
   make prefix=/usr/local/git all && \
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index 3516383..d09ddaa 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -950,6 +950,11 @@
 src/core/ext/load_reporting/load_reporting_filter.c \
 src/core/ext/load_reporting/load_reporting_filter.h \
 src/core/ext/resolver/README.md \
+src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c \
+src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h \
+src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c \
+src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c \
+src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h \
 src/core/ext/resolver/dns/native/README.md \
 src/core/ext/resolver/dns/native/dns_resolver.c \
 src/core/ext/resolver/sockaddr/README.md \
@@ -1111,6 +1116,8 @@
 src/core/lib/iomgr/sockaddr_utils.c \
 src/core/lib/iomgr/sockaddr_utils.h \
 src/core/lib/iomgr/sockaddr_windows.h \
+src/core/lib/iomgr/socket_factory_posix.c \
+src/core/lib/iomgr/socket_factory_posix.h \
 src/core/lib/iomgr/socket_mutator.c \
 src/core/lib/iomgr/socket_mutator.h \
 src/core/lib/iomgr/socket_utils.h \
@@ -1309,6 +1316,8 @@
 src/core/lib/surface/channel_stack_type.h \
 src/core/lib/surface/completion_queue.c \
 src/core/lib/surface/completion_queue.h \
+src/core/lib/surface/completion_queue_factory.c \
+src/core/lib/surface/completion_queue_factory.h \
 src/core/lib/surface/event_string.c \
 src/core/lib/surface/event_string.h \
 src/core/lib/surface/init.c \
diff --git a/tools/grpcz/BUILD b/tools/grpcz/BUILD
new file mode 100644
index 0000000..5e1faf7
--- /dev/null
+++ b/tools/grpcz/BUILD
@@ -0,0 +1,63 @@
+# Copyright 2017, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+licenses(["notice"])  # 3-clause BSD
+
+package(default_visibility = ["//visibility:public"])
+
+load("//:bazel/grpc_build_system.bzl", "grpc_proto_library")
+
+grpc_proto_library (
+    name = "monitoring_proto",
+    srcs = [
+        "monitoring.proto",
+    ],
+    deps = [
+        ":census_proto",
+    ],
+    well_known_protos = "@submodule_protobuf//:well_known_protos",
+)
+
+grpc_proto_library (
+    name = "census_proto",
+    srcs = [
+        "census.proto",
+    ],
+    well_known_protos = "@submodule_protobuf//:well_known_protos",
+)
+
+cc_binary(
+    name = "grpcz_client",
+    srcs = ["grpcz_client.cc",],
+    deps = [
+        "//external:gflags",
+        "monitoring_proto",
+        "@mongoose_repo//:mongoose_lib",
+    ],
+)
diff --git a/tools/grpcz/census.proto b/tools/grpcz/census.proto
new file mode 100644
index 0000000..d1ff694
--- /dev/null
+++ b/tools/grpcz/census.proto
@@ -0,0 +1,318 @@
+// Copyright 2017, Google Inc.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//     http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//TODO(ericgribkoff) Depend on this directly from the instrumentation-proto
+//repository.
+
+syntax = "proto3";
+
+package google.instrumentation;
+
+option java_package = "com.google.instrumentation.stats.proto";
+option java_outer_classname = "CensusProto";
+
+// All the census protos.
+//
+// Nomenclature notes:
+//   * Capitalized names below (like View) are protos.
+//   * Protos which describe types are named with a Descriptor suffix (e.g.
+//     MesurementDescriptor).
+//
+// Census lets you define the type and description of the data being measured
+// (e.g. the latency of an RPC or the number of CPU cycles spent on an
+// operation using MeasurementDescriptor. As individual measurements (a double
+// value) for are recorded, they are aggregated together into an
+// Aggregation. There are two Aggregation types available: Distribution
+// (describes the distribution of all measurements, possibly with a histogram)
+// and IntervalStats (the count and mean of measurements across specified time
+// periods). An Aggregation is described by an AggregationDescriptor.
+//
+// You can define how your measurements (described by a MeasurementDescriptor)
+// are broken down by Tag values and which Aggregations to use through a
+// ViewDescriptor. The output (all measurements broken down by tag values into
+// specific Aggregations) is called a View.
+
+
+// The following two types are copied from
+// google/protobuf/{duration,timestamp}.proto. Ideally, we would be able to
+// import them, but this causes compilation issues on C-based systems
+// (e.g. https://koti.kapsi.fi/jpa/nanopb/), which cannot process the C++
+// headers generated from the standard protobuf distribution. See the relevant
+// proto files for full documentation of these types.
+
+message Duration {
+  // Signed seconds of the span of time. Must be from -315,576,000,000
+  // to +315,576,000,000 inclusive.
+  int64 seconds = 1;
+
+  // Signed fractions of a second at nanosecond resolution of the span
+  // of time. Durations less than one second are represented with a 0
+  // `seconds` field and a positive or negative `nanos` field. For durations
+  // of one second or more, a non-zero value for the `nanos` field must be
+  // of the same sign as the `seconds` field. Must be from -999,999,999
+  // to +999,999,999 inclusive.
+  int32 nanos = 2;
+}
+
+message Timestamp {
+  // Represents seconds of UTC time since Unix epoch
+  // 1970-01-01T00:00:00Z. Must be from from 0001-01-01T00:00:00Z to
+  // 9999-12-31T23:59:59Z inclusive.
+  int64 seconds = 1;
+
+  // Non-negative fractions of a second at nanosecond resolution. Negative
+  // second values with fractions must still have non-negative nanos values
+  // that count forward in time. Must be from 0 to 999,999,999
+  // inclusive.
+  int32 nanos = 2;
+}
+
+// MeasurementDescriptor describes a data point (measurement) type.
+message MeasurementDescriptor {
+  // A descriptive name, e.g. rpc_latency, cpu. Must be unique.
+  string name = 1;
+
+  // More detailed description of the resource, used in documentation.
+  string description = 2;
+
+  // Fundamental units of measurement supported by Census
+  // TODO(aveitch): expand this to include other S.I. units?
+  enum BasicUnit {
+    UNKNOWN = 0;    // Implementations should not use this
+    SCALAR = 1;     // Dimensionless
+    BITS = 2;       // A single bit
+    BYTES = 3;      // An 8-bit byte
+    SECONDS = 4;    // S.I. unit
+    CORES = 5;      // CPU core usage
+    MAX_UNITS = 6;  // Last defined value; implementations should only use
+                    // this for validation.
+  }
+
+  // MeasurementUnit lets you build compound units of the form
+  //   10^n * (A * B * ...) / (X * Y * ...),
+  // where the elements in the numerator and denominator are all BasicUnits.  A
+  // MeasurementUnit must have at least one BasicUnit in its numerator.
+  //
+  // To specify multiplication in the numerator or denominator, simply specify
+  // multiple numerator or denominator fields.  For example:
+  //
+  // - byte-seconds (i.e. bytes * seconds):
+  //     numerator: BYTES
+  //     numerator: SECS
+  //
+  // - events/sec^2 (i.e. rate of change of events/sec):
+  //     numerator: SCALAR
+  //     denominator: SECS
+  //     denominator: SECS
+  //
+  // To specify multiples (in power of 10) of units, specify a non-zero
+  // 'power10' value, for example:
+  //
+  // - MB/s (i.e. megabytes / s):
+  //     power10: 6
+  //     numerator: BYTES
+  //     denominator: SECS
+  //
+  // - nanoseconds
+  //     power10: -9
+  //     numerator: SECS
+  message MeasurementUnit {
+    int32 power10 = 1;
+    repeated BasicUnit numerators = 2;
+    repeated BasicUnit denominators = 3;
+  }
+
+  // The units used by this type of measurement.
+  MeasurementUnit unit = 3;
+}
+
+// An aggregation summarizes a series of individual measurements. There are
+// two types of aggregation (IntervalAggregation and DistributionAggregation),
+// unique types of each can be set using descriptors for each.
+
+// DistributionAggregation contains summary statistics for a population of
+// values and, optionally, a histogram representing the distribution of those
+// values across a specified set of histogram buckets, as defined in
+// DistributionAggregationDescriptor.bucket_bounds.
+//
+// The summary statistics are the count, mean, minimum, and the maximum of the
+// set of population of values.
+//
+// Although it is not forbidden, it is generally a bad idea to include
+// non-finite values (infinities or NaNs) in the population of values, as this
+// will render the `mean` field meaningless.
+message DistributionAggregation {
+  // The number of values in the population. Must be non-negative.
+  int64 count = 1;
+
+  // The arithmetic mean of the values in the population. If `count` is zero
+  // then this field must be zero.
+  double mean = 2;
+
+  // The sum of the values in the population.  If `count` is zero then this
+  // field must be zero.
+  double sum = 3;
+
+  // Describes a range of population values.
+  message Range {
+    // The minimum of the population values.
+    double min = 1;
+    // The maximum of the population values.
+    double max = 2;
+  }
+
+  // The range of the population values. If `count` is zero, this field will not
+  // be defined.
+  Range range = 4;
+
+  // A Distribution may optionally contain a histogram of the values in the
+  // population. The histogram is given in `bucket_count` as counts of values
+  // that fall into one of a sequence of non-overlapping buckets, as described
+  // by `DistributionAggregationDescriptor.bucket_boundaries`. The sum of the
+  // values in `bucket_counts` must equal the value in `count`.
+  //
+  // Bucket counts are given in order under the numbering scheme described
+  // above (the underflow bucket has number 0; the finite buckets, if any,
+  // have numbers 1 through N-2; the overflow bucket has number N-1).
+  //
+  // The size of `bucket_count` must be no greater than N as defined in
+  // `bucket_boundaries`.
+  //
+  // Any suffix of trailing zero bucket_count fields may be omitted.
+  repeated int64 bucket_counts = 5;
+
+  // Tags associated with this DistributionAggregation. These will be filled
+  // in based on the View specification.
+  repeated Tag tags = 6;
+}
+
+message DistributionAggregationDescriptor {
+  // A Distribution may optionally contain a histogram of the values in the
+  // population. The bucket boundaries for that histogram are described by
+  // `bucket_bounds`. This defines `size(bucket_bounds) + 1` (= N)
+  // buckets. The boundaries for bucket index i are:
+  //
+  // [-infinity, bucket_bounds[i]) for i == 0
+  // [bucket_bounds[i-1], bucket_bounds[i]) for 0 < i < N-2
+  // [bucket_bounds[i-1], +infinity) for i == N-1
+  //
+  // i.e. an underflow bucket (number 0), zero or more finite buckets (1
+  // through N - 2, and an overflow bucket (N - 1), with inclusive lower
+  // bounds and exclusive upper bounds.
+  //
+  // If `bucket_bounds` has no elements (zero size), then there is no
+  // histogram associated with the Distribution. If `bucket_bounds` has only
+  // one element, there are no finite buckets, and that single element is the
+  // common boundary of the overflow and underflow buckets. The values must
+  // be monotonically increasing.
+  repeated double bucket_bounds = 1;
+}
+
+// An IntervalAggreation records summary stats over various time
+// windows. These stats are approximate, with the degree of accuracy
+// controlled by setting the n_sub_intervals parameter in the
+// IntervalAggregationDescriptor.
+message IntervalAggregation {
+  // Summary statistic over a single time interval.
+  message Interval {
+    // The interval duration. Must be positive.
+    Duration interval_size = 1;
+    // Approximate number of measurements recorded in this interval.
+    double count = 2;
+    // The cumulative sum of measurements in this interval.
+    double sum = 3;
+  }
+
+  // Full set of intervals for this aggregation.
+  repeated Interval intervals = 1;
+
+  // Tags associated with this IntervalAggregation. These will be filled in
+  // based on the View specification.
+  repeated Tag tags = 2;
+}
+
+// An IntervalAggreationDescriptor specifies time intervals for an
+// IntervalAggregation.
+message IntervalAggregationDescriptor {
+  // Number of internal sub-intervals to use when collecting stats for each
+  // interval. The max error in interval measurements will be approximately
+  // 1/n_sub_intervals (although in practice, this will only be approached in
+  // the presence of very large and bursty workload changes), and underlying
+  // memory usage will be roughly proportional to the value of this
+  // field. Must be in the range [2, 20]. A value of 5 will be used if this is
+  // unspecified.
+  int32 n_sub_intervals = 1;
+
+  // The size of each interval, as a time duration. Must have at least one
+  // element.
+  repeated Duration interval_sizes = 2;
+}
+
+// A Tag: key-value pair.
+message Tag {
+  string key = 1;
+  string value = 2;
+}
+
+// A ViewDescriptor specifies an AggregationDescriptor and a set of tag
+// keys. Views instantiated from this descriptor will contain Aggregations
+// broken down by the unique set of matching tag values for each measurement.
+message ViewDescriptor {
+  // Name of view. Must be unique.
+  string name = 1;
+
+  // More detailed description, for documentation purposes.
+  string description = 2;
+
+  // Name of a MeasurementDescriptor to be used for this view.
+  string measurement_descriptor_name = 3;
+
+  // Aggregation type to associate with View.
+  oneof aggregation {
+    IntervalAggregationDescriptor interval_aggregation = 4;
+    DistributionAggregationDescriptor distribution_aggregation = 5;
+  }
+
+  // Tag keys to match with a given measurement. If no keys are specified,
+  // then all stats are recorded. Keys must be unique.
+  repeated string tag_keys = 6;
+}
+
+// DistributionView contains all aggregations for a view specified using a
+// DistributionAggregationDescriptor.
+message DistributionView {
+  // Aggregations - each will have a unique set of tag values for the tag_keys
+  // associated with the corresponding View.
+  repeated DistributionAggregation aggregations = 1;
+
+  // Start and end timestamps over which aggregations was accumulated.
+  Timestamp start = 2;
+  Timestamp end = 3;
+}
+
+// IntervalView contains all aggregations for a view specified using a
+// IntervalAggregationDescriptor.
+message IntervalView {
+  // Aggregations - each will have a unique set of tag values for the tag_keys
+  // associated with the corresponding View.
+  repeated IntervalAggregation aggregations = 1;
+}
+
+// A View contains the aggregations based on a ViewDescriptor.
+message View {
+  // ViewDescriptor name associated with this set of View.
+  string view_name = 1;
+
+  oneof view {
+    DistributionView distribution_view = 2;
+    IntervalView interval_view = 3;
+  }
+}
diff --git a/tools/grpcz/grpcz_client.cc b/tools/grpcz/grpcz_client.cc
new file mode 100644
index 0000000..47eec8d
--- /dev/null
+++ b/tools/grpcz/grpcz_client.cc
@@ -0,0 +1,181 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <string>
+
+#include <google/protobuf/util/json_util.h>
+#include <grpc++/grpc++.h>
+#include <grpc/support/log.h>
+
+#include "gflags/gflags.h"
+#include "mongoose.h"
+
+// TODO (makdharma): remove local copies of these protos
+#include "tools/grpcz/census.grpc.pb.h"
+#include "tools/grpcz/monitoring.grpc.pb.h"
+
+DEFINE_string(
+    grpcz_server, "127.0.0.1:8080",
+    "Unix domain socket path (e.g. unix://tmp/grpcz.sock) or IP address"
+    "(host:port) where grpcz server is running.");
+DEFINE_string(http_port, "8000",
+              "Port id for accessing the HTTP server that renders /grpcz page");
+DEFINE_bool(print_to_console, false,
+            "print the JSON retreived from grpcz server and quit");
+
+using grpc::Channel;
+using grpc::ClientContext;
+using grpc::Status;
+
+using ::grpc::instrumentation::v1alpha::CanonicalRpcStats;
+using ::grpc::instrumentation::v1alpha::Monitoring;
+
+static const std::string static_html_header =
+    "<!DOCTYPE html> <html> <head> <style> \
+table { border-collapse: collapse; width: 100%; } \
+table, td, th { border: 1px solid black; } \
+</style> </head> <body>\
+<div id='stats' data-stats='";
+
+static const std::string static_html_footer =
+    "' class='hidden'></div>\
+<h1>GRPCZ Statistics</h1> <div id='table'> </div> \
+<script> \
+  var canonical_stats = JSON.parse(\
+            document.getElementById('stats').getAttribute('data-stats')); \
+  var table = document.createElement('table'); \
+  if (canonical_stats['Error Message'] != undefined) { \
+     document.getElementById('table').innerHTML = canonical_stats['Error Message']; } \
+  else {\
+  for (var key in canonical_stats) { \
+    name = canonical_stats[key]['view']['viewName']; \
+    distribution = canonical_stats[key]['view']['distributionView']; \
+    interval = canonical_stats[key]['view']['intervalView']; \
+    value = (interval == undefined) ? \
+      JSON.stringify(distribution, null, ' ') : \
+      JSON.stringify(interval, null, ' '); \
+    var row = table.insertRow(-1); \
+    var col1 = row.insertCell(0); \
+    var col2 = row.insertCell(1); \
+    col1.innerHTML = name; \
+    col2.innerHTML = '<pre>' + value + '</pre>'; \
+  } \
+  document.getElementById('table').appendChild(table); \
+  }\
+</script> </body> </html>";
+
+class GrpczClient {
+ public:
+  GrpczClient(std::shared_ptr<Channel> channel)
+      : stub_(Monitoring::NewStub(channel)) {}
+
+  std::string GetStatsAsJson() {
+    const ::google::protobuf::Empty request;
+    CanonicalRpcStats reply;
+    ClientContext context;
+    Status status = stub_->GetCanonicalRpcStats(&context, request, &reply);
+
+    if (status.ok()) {
+      std::string json_str;
+      ::google::protobuf::util::MessageToJsonString(reply, &json_str);
+      return json_str;
+    } else {
+      static const std::string error_message_json =
+          "{\"Error Message\":\"" + status.error_message() + "\"}";
+      gpr_log(GPR_DEBUG, "%d: %s", status.error_code(),
+              status.error_message().c_str());
+      return error_message_json;
+    }
+  }
+
+ private:
+  std::unique_ptr<Monitoring::Stub> stub_;
+};
+
+static struct mg_serve_http_opts s_http_server_opts;
+std::unique_ptr<GrpczClient> g_grpcz_client;
+
+static void ev_handler(struct mg_connection *nc, int ev, void *p) {
+  if (ev == MG_EV_HTTP_REQUEST) {
+    mg_serve_http(nc, (struct http_message *)p, s_http_server_opts);
+  }
+}
+
+static void grpcz_handler(struct mg_connection *nc, int ev, void *ev_data) {
+  (void)ev;
+  (void)ev_data;
+  gpr_log(GPR_INFO, "fetching grpcz stats from %s", FLAGS_grpcz_server.c_str());
+  std::string json_str = g_grpcz_client->GetStatsAsJson();
+  std::string rendered_html =
+      static_html_header + json_str + static_html_footer;
+  mg_printf(nc, "HTTP/1.0 200 OK\r\n\r\n%s", rendered_html.c_str());
+  nc->flags |= MG_F_SEND_AND_CLOSE;
+}
+
+int main(int argc, char **argv) {
+  gflags::ParseCommandLineFlags(&argc, &argv, true);
+
+  // Create a client
+  g_grpcz_client.reset(new GrpczClient(grpc::CreateChannel(
+      FLAGS_grpcz_server, grpc::InsecureChannelCredentials())));
+  if (FLAGS_print_to_console) {
+    // using GPR_ERROR since this is the default verbosity. _DEBUG or _INFO
+    // won't print unless GRPC_VERBOSITY env var is set appropriately, which
+    // might confuse users of this utility.
+    gpr_log(GPR_ERROR, "%s\n", g_grpcz_client->GetStatsAsJson().c_str());
+    return 0;
+  }
+
+  // Set up a mongoose webserver handler
+  struct mg_mgr mgr;
+  mg_mgr_init(&mgr, NULL);
+  gpr_log(GPR_INFO, "Starting grpcz web server on port %s\n",
+          FLAGS_http_port.c_str());
+
+  struct mg_connection *nc = mg_bind(&mgr, FLAGS_http_port.c_str(), ev_handler);
+  if (nc == NULL) {
+    gpr_log(GPR_ERROR, "Failed to create listener on port %s\n",
+            FLAGS_http_port.c_str());
+    return -1;
+  }
+  mg_register_http_endpoint(nc, "/grpcz", grpcz_handler);
+  mg_set_protocol_http_websocket(nc);
+
+  // Poll in a loop and serve /grpcz pages
+  for (;;) {
+    static const int k_sleep_millis = 100;
+    mg_mgr_poll(&mgr, k_sleep_millis);
+  }
+  mg_mgr_free(&mgr);
+  return 0;
+}
diff --git a/tools/grpcz/monitoring.proto b/tools/grpcz/monitoring.proto
new file mode 100644
index 0000000..fefcd7d
--- /dev/null
+++ b/tools/grpcz/monitoring.proto
@@ -0,0 +1,156 @@
+// Copyright 2017, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// This file defines an interface for exporting monitoring information
+// out of gRPC servers.
+syntax = "proto3";
+
+// TODO(ericgribkoff) Figure out how to manage the external Census proto
+// dependency.
+import "tools/grpcz/census.proto";
+import "google/protobuf/any.proto";
+import "google/protobuf/empty.proto";
+
+package grpc.instrumentation.v1alpha;
+
+option java_multiple_files = true;
+option java_package = "io.grpc.instrumentation.v1alpha";
+option java_outer_classname = "MonitoringProto";
+
+service Monitoring {
+  // Return canonical RPC stats
+  rpc GetCanonicalRpcStats(google.protobuf.Empty) returns (CanonicalRpcStats) {
+  }
+
+  // Query the server for specific stats
+  rpc GetStats(StatsRequest) returns (StatsResponse) {
+  }
+
+  // Request the server to stream back snapshots of the requested stats
+  rpc WatchStats(StatsRequest) returns (stream StatsResponse) {
+  }
+
+
+  // Return request traces.
+  rpc GetRequestTraces(TraceRequest) returns(TraceResponse) {
+  // TODO(aveitch): Please define the messages here
+  }
+
+  // Return application-defined groups of monitoring data.
+  // This is a low level facility to allow extension of the monitoring API to
+  // application-specific monitoring data. Frameworks may use this to define
+  // additional groups of monitoring data made available by servers.
+  rpc GetCustomMonitoringData(MonitoringDataGroup)
+    returns (CustomMonitoringData) {
+  }
+
+}
+
+// Canonical RPC stats exported by gRPC.
+message CanonicalRpcStats {
+  StatsResponse rpc_client_errors = 1;
+  StatsResponse rpc_client_completed_rpcs = 2;
+  StatsResponse rpc_client_started_rpcs = 3;
+  StatsResponse rpc_client_elapsed_time = 4;
+  StatsResponse rpc_client_server_elapsed_time = 5;
+  StatsResponse rpc_client_request_bytes = 6;
+  StatsResponse rpc_client_response_bytes = 7;
+  StatsResponse rpc_client_request_count = 8;
+  StatsResponse rpc_client_response_count = 9;
+  StatsResponse rpc_server_errors = 10;
+  StatsResponse rpc_server_completed_rpcs = 11;
+  StatsResponse rpc_server_server_elapsed_time = 12;
+  StatsResponse rpc_server_request_bytes = 13;
+  StatsResponse rpc_server_response_bytes = 14;
+  StatsResponse rpc_server_request_count = 15;
+  StatsResponse rpc_server_response_count = 16;
+  StatsResponse rpc_server_elapsed_time = 17;
+  //TODO(ericgribkoff) Add minute-hour interval stats.
+}
+
+// This message is sent when requesting a set of stats (Census Views) from
+// a client system, as part of the MonitoringService API's.
+message StatsRequest {
+  // An optional set of ViewDescriptor names. Only Views using these
+  // descriptors will be sent back in the response. If no names are provided,
+  // then all Views present in the client system will be included in every
+  // response. If measurement_names is also provided, then Views matching the
+  // intersection of the two are returned.
+  // TODO(aveitch): Consider making this a list of regexes or prefix matches in
+  // the future.
+  repeated string view_names = 1;
+
+  // An optional set of MeasurementDescriptor names. Only Views using these
+  // descriptors will be sent back in the response. If no names are provided,
+  // then all Views present in the client system will be included in every
+  // response. If view_names is also provided, then Views matching the
+  // intersection of the two are returned.
+  // TODO(aveitch): Consider making this a list of regexes or prefix matches in
+  // the future.
+  repeated string measurement_names = 2;
+
+  // By default, the MeasurementDescriptors and ViewDescriptors corresponding to
+  // the Views that are returned in a StatsResponse will be included in the
+  // first such response. Set this to true to have them not sent.
+  bool dont_include_descriptors_in_first_response = 3;
+}
+
+// This message contains all information relevant to a single View. It is the
+// return type for GetStats and WatchStats, and used in CanonicalRpcStats.
+message StatsResponse {
+  // A StatsResponse can optionally contain the MeasurementDescriptor and
+  // ViewDescriptor for the View. These will be sent in the first WatchStats
+  // response, or all GetStats and GetCanonicalRpcStats responses. These will
+  // not be set for {Get,Watch}Stats if
+  // dont_include_descriptors_in_first_response is set to true in the
+  // StatsRequest.
+  google.instrumentation.MeasurementDescriptor measurement_descriptor = 1;
+  google.instrumentation.ViewDescriptor view_descriptor = 2;
+
+  // The View data.
+  google.instrumentation.View view = 3;
+}
+
+message TraceRequest {
+  // TODO(aveitch): Complete definition of this type
+}
+
+message TraceResponse {
+  // TODO(aveitch): Complete definition of this type
+}
+
+message MonitoringDataGroup {
+  string name = 1;  // name of a group of monitoring data
+}
+
+// The wrapper for custom monitoring data.
+message CustomMonitoringData {
+  // can be any application specific monitoring data
+  google.protobuf.Any contents = 1;
+}
diff --git a/tools/jenkins/comment_on_pr.sh b/tools/jenkins/comment_on_pr.sh
new file mode 100755
index 0000000..85f33aa
--- /dev/null
+++ b/tools/jenkins/comment_on_pr.sh
@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+# Copyright 2017, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# This script is invoked by Jenkins to comment $1 on pull requests
+# when triggered by a build
+
+set -e
+
+if [ -z "$1" ] || [ -z $JENKINS_OAUTH_TOKEN ] || [ -z $ghprbPullId ]; then
+  echo "Insufficient arguments or environment variables provided."
+  exit 1
+fi
+
+# Format the comment message to JSON
+COMMENT_MESSAGE="{\"body\":\"$1\"}"
+
+curl -k -H "Authorization: token $JENKINS_OAUTH_TOKEN" -H "Content-Type: application/json" \
+  -d "$COMMENT_MESSAGE" https://api.github.com/repos/grpc/grpc/issues/$ghprbPullId/comments
diff --git a/tools/jenkins/run_performance.sh b/tools/jenkins/run_performance.sh
index 99b920f..2b05a8d 100755
--- a/tools/jenkins/run_performance.sh
+++ b/tools/jenkins/run_performance.sh
@@ -31,7 +31,12 @@
 # This script is invoked by Jenkins and runs performance smoke test.
 set -ex
 
+# List of benchmarks that provide good signal for analyzing performance changes in pull requests
+BENCHMARKS_TO_RUN="bm_closure bm_cq bm_call_create bm_error bm_chttp2_hpack bm_chttp2_transport bm_pollset bm_metadata"
+
 # Enter the gRPC repo root
 cd $(dirname $0)/../..
 
 tools/run_tests/run_performance_tests.py -l c++ node ruby csharp python --netperf --category smoketest
+# todo(mattkwong): Change performance test to use microbenchmarking
+# tools/run_tests/run_microbenchmark.py -c summary --diff_perf origin/$ghprbTargetBranch -b $BENCHMARKS_TO_RUN
diff --git a/tools/run_tests/artifacts/build_artifact_node.bat b/tools/run_tests/artifacts/build_artifact_node.bat
index 0a2bc4b..336a63b 100644
--- a/tools/run_tests/artifacts/build_artifact_node.bat
+++ b/tools/run_tests/artifacts/build_artifact_node.bat
@@ -27,7 +27,7 @@
 @rem (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 @rem OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-set node_versions=1.1.0 2.0.0 3.0.0 4.0.0 5.0.0 6.0.0 7.0.0
+set node_versions=4.0.0 5.0.0 6.0.0 7.0.0
 
 set electron_versions=1.0.0 1.1.0 1.2.0 1.3.0 1.4.0
 
diff --git a/tools/run_tests/artifacts/build_artifact_node.sh b/tools/run_tests/artifacts/build_artifact_node.sh
index 47b1f33..a33ab45 100755
--- a/tools/run_tests/artifacts/build_artifact_node.sh
+++ b/tools/run_tests/artifacts/build_artifact_node.sh
@@ -42,7 +42,7 @@
 
 npm update
 
-node_versions=( 1.1.0 2.0.0 3.0.0 4.0.0 5.0.0 6.0.0 7.0.0 )
+node_versions=( 4.0.0 5.0.0 6.0.0 7.0.0 )
 
 electron_versions=( 1.0.0 1.1.0 1.2.0 1.3.0 1.4.0 )
 
diff --git a/tools/run_tests/generated/sources_and_headers.json b/tools/run_tests/generated/sources_and_headers.json
index 2e75d1c..fd12ea5 100644
--- a/tools/run_tests/generated/sources_and_headers.json
+++ b/tools/run_tests/generated/sources_and_headers.json
@@ -5576,6 +5576,7 @@
       "grpc_lb_policy_pick_first", 
       "grpc_lb_policy_round_robin", 
       "grpc_load_reporting", 
+      "grpc_resolver_dns_ares", 
       "grpc_resolver_dns_native", 
       "grpc_resolver_sockaddr", 
       "grpc_secure", 
@@ -5677,6 +5678,7 @@
       "grpc_lb_policy_pick_first", 
       "grpc_lb_policy_round_robin", 
       "grpc_load_reporting", 
+      "grpc_resolver_dns_ares", 
       "grpc_resolver_dns_native", 
       "grpc_resolver_sockaddr", 
       "grpc_transport_chttp2_client_insecure", 
@@ -7022,6 +7024,41 @@
     "type": "lib"
   }, 
   {
+    "deps": [], 
+    "headers": [
+      "third_party/cares/ares_build.h", 
+      "third_party/cares/cares/ares.h", 
+      "third_party/cares/cares/ares_data.h", 
+      "third_party/cares/cares/ares_dns.h", 
+      "third_party/cares/cares/ares_getenv.h", 
+      "third_party/cares/cares/ares_getopt.h", 
+      "third_party/cares/cares/ares_inet_net_pton.h", 
+      "third_party/cares/cares/ares_iphlpapi.h", 
+      "third_party/cares/cares/ares_ipv6.h", 
+      "third_party/cares/cares/ares_library_init.h", 
+      "third_party/cares/cares/ares_llist.h", 
+      "third_party/cares/cares/ares_nowarn.h", 
+      "third_party/cares/cares/ares_platform.h", 
+      "third_party/cares/cares/ares_private.h", 
+      "third_party/cares/cares/ares_rules.h", 
+      "third_party/cares/cares/ares_setup.h", 
+      "third_party/cares/cares/ares_strcasecmp.h", 
+      "third_party/cares/cares/ares_strdup.h", 
+      "third_party/cares/cares/ares_version.h", 
+      "third_party/cares/cares/bitncmp.h", 
+      "third_party/cares/cares/config-win32.h", 
+      "third_party/cares/cares/setup_once.h", 
+      "third_party/cares/config_darwin/ares_config.h", 
+      "third_party/cares/config_linux/ares_config.h"
+    ], 
+    "is_filegroup": false, 
+    "language": "c", 
+    "name": "ares", 
+    "src": [], 
+    "third_party": false, 
+    "type": "lib"
+  }, 
+  {
     "deps": [
       "gpr", 
       "gpr_test_util", 
@@ -7511,6 +7548,7 @@
       "src/core/lib/iomgr/sockaddr_posix.h", 
       "src/core/lib/iomgr/sockaddr_utils.h", 
       "src/core/lib/iomgr/sockaddr_windows.h", 
+      "src/core/lib/iomgr/socket_factory_posix.h", 
       "src/core/lib/iomgr/socket_mutator.h", 
       "src/core/lib/iomgr/socket_utils.h", 
       "src/core/lib/iomgr/socket_utils_posix.h", 
@@ -7550,6 +7588,7 @@
       "src/core/lib/surface/channel_init.h", 
       "src/core/lib/surface/channel_stack_type.h", 
       "src/core/lib/surface/completion_queue.h", 
+      "src/core/lib/surface/completion_queue_factory.h", 
       "src/core/lib/surface/event_string.h", 
       "src/core/lib/surface/init.h", 
       "src/core/lib/surface/lame_client.h", 
@@ -7680,6 +7719,8 @@
       "src/core/lib/iomgr/sockaddr_utils.c", 
       "src/core/lib/iomgr/sockaddr_utils.h", 
       "src/core/lib/iomgr/sockaddr_windows.h", 
+      "src/core/lib/iomgr/socket_factory_posix.c", 
+      "src/core/lib/iomgr/socket_factory_posix.h", 
       "src/core/lib/iomgr/socket_mutator.c", 
       "src/core/lib/iomgr/socket_mutator.h", 
       "src/core/lib/iomgr/socket_utils.h", 
@@ -7745,6 +7786,7 @@
       "src/core/lib/json/json_string.c", 
       "src/core/lib/json/json_writer.c", 
       "src/core/lib/json/json_writer.h", 
+      "src/core/lib/security/util/b64.c", 
       "src/core/lib/slice/percent_encoding.c", 
       "src/core/lib/slice/percent_encoding.h", 
       "src/core/lib/slice/slice.c", 
@@ -7774,6 +7816,8 @@
       "src/core/lib/surface/channel_stack_type.h", 
       "src/core/lib/surface/completion_queue.c", 
       "src/core/lib/surface/completion_queue.h", 
+      "src/core/lib/surface/completion_queue_factory.c", 
+      "src/core/lib/surface/completion_queue_factory.h", 
       "src/core/lib/surface/event_string.c", 
       "src/core/lib/surface/event_string.h", 
       "src/core/lib/surface/init.h", 
@@ -8032,6 +8076,29 @@
       "grpc_base", 
       "grpc_client_channel"
     ], 
+    "headers": [
+      "src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h", 
+      "src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h"
+    ], 
+    "is_filegroup": true, 
+    "language": "c", 
+    "name": "grpc_resolver_dns_ares", 
+    "src": [
+      "src/core/ext/resolver/dns/c_ares/dns_resolver_ares.c", 
+      "src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h", 
+      "src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c", 
+      "src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c", 
+      "src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h"
+    ], 
+    "third_party": false, 
+    "type": "filegroup"
+  }, 
+  {
+    "deps": [
+      "gpr", 
+      "grpc_base", 
+      "grpc_client_channel"
+    ], 
     "headers": [], 
     "is_filegroup": true, 
     "language": "c", 
diff --git a/tools/run_tests/helper_scripts/run_ruby_end2end_tests.sh b/tools/run_tests/helper_scripts/run_ruby_end2end_tests.sh
new file mode 100755
index 0000000..d7da636
--- /dev/null
+++ b/tools/run_tests/helper_scripts/run_ruby_end2end_tests.sh
@@ -0,0 +1,41 @@
+#!/bin/bash
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set -ex
+
+# change to grpc repo root
+cd $(dirname $0)/../../..
+
+EXIT_CODE=0
+ruby src/ruby/end2end/sig_handling_driver.rb || EXIT_CODE=1
+ruby src/ruby/end2end/channel_state_driver.rb || EXIT_CODE=1
+ruby src/ruby/end2end/channel_closing_driver.rb || EXIT_CODE=1
+ruby src/ruby/end2end/sig_int_during_channel_watch_driver.rb || EXIT_CODE=1
+exit $EXIT_CODE
diff --git a/tools/run_tests/run_microbenchmark.py b/tools/run_tests/run_microbenchmark.py
index 6bedc54..19cf16e 100755
--- a/tools/run_tests/run_microbenchmark.py
+++ b/tools/run_tests/run_microbenchmark.py
@@ -38,6 +38,19 @@
 import python_utils.jobset as jobset
 import python_utils.start_port_server as start_port_server
 
+_AVAILABLE_BENCHMARK_TESTS = ['bm_fullstack_unary_ping_pong',
+                              'bm_fullstack_streaming_ping_pong',
+                              'bm_fullstack_streaming_pump',
+                              'bm_closure',
+                              'bm_cq',
+                              'bm_call_create',
+                              'bm_error',
+                              'bm_chttp2_hpack',
+                              'bm_chttp2_transport',
+                              'bm_pollset',
+                              'bm_metadata',
+                              'bm_fullstack_trickle']
+
 flamegraph_dir = os.path.join(os.path.expanduser('~'), 'FlameGraph')
 
 os.chdir(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
@@ -201,19 +214,8 @@
                   default=sorted(collectors.keys()),
                   help='Which collectors should be run against each benchmark')
 argp.add_argument('-b', '--benchmarks',
-                  default=['bm_fullstack_unary_ping_pong',
-                           'bm_fullstack_streaming_ping_pong',
-                           'bm_fullstack_streaming_pump',
-                           'bm_closure',
-                           'bm_cq',
-                           'bm_call_create',
-                           'bm_error',
-                           'bm_chttp2_hpack',
-                           'bm_chttp2_transport',
-                           'bm_pollset',
-                           'bm_metadata',
-                           'bm_fullstack_trickle',
-                           ],
+                  choices=_AVAILABLE_BENCHMARK_TESTS,
+                  default=_AVAILABLE_BENCHMARK_TESTS,
                   nargs='+',
                   type=str,
                   help='Which microbenchmarks should be run')
@@ -237,6 +239,7 @@
     for bm_name in args.benchmarks:
       collectors[collect](bm_name, args)
   if args.diff_perf:
+    git_comment = 'Performance differences between this PR and %s\\n' % args.diff_perf
     if 'summary' not in args.collect:
       for bm_name in args.benchmarks:
         run_summary(bm_name, 'opt', bm_name)
@@ -264,7 +267,14 @@
       if diff:
         heading('Performance diff: %s' % bm_name)
         text(diff)
+        git_comment += '```\\nPerformance diff: %s\\n%s\\n```\\n' % (bm_name, diff.replace('\n', '\\n'))
 finally:
+  if args.diff_perf:
+    subprocess.call(['tools/jenkins/comment_on_pr.sh "%s"' % git_comment.replace('`', '\`')],
+                    stdout=subprocess.PIPE,
+                    shell=True)
+  if not os.path.exists('reports'):
+    os.makedirs('reports')
   index_html += "</body>\n</html>\n"
   with open('reports/index.html', 'w') as f:
     f.write(index_html)
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index cba91a9..fa21743 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -250,6 +250,9 @@
                  _ROOT + '/src/core/lib/tsi/test_creds/ca.pem',
              'GRPC_POLL_STRATEGY': polling_strategy,
              'GRPC_VERBOSITY': 'DEBUG'}
+        resolver = os.environ.get('GRPC_DNS_RESOLVER', None);
+        if resolver:
+          env['GRPC_DNS_RESOLVER'] = resolver
         shortname_ext = '' if polling_strategy=='all' else ' GRPC_POLL_STRATEGY=%s' % polling_strategy
         timeout_scaling = 1
         if polling_strategy == 'poll-cv':
@@ -693,9 +696,13 @@
     _check_compiler(self.args.compiler, ['default'])
 
   def test_specs(self):
-    return [self.config.job_spec(['tools/run_tests/helper_scripts/run_ruby.sh'],
-                                 timeout_seconds=10*60,
-                                 environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
+    tests = [self.config.job_spec(['tools/run_tests/helper_scripts/run_ruby.sh'],
+                                  timeout_seconds=10*60,
+                                  environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
+    tests.append(self.config.job_spec(['tools/run_tests/helper_scripts/run_ruby_end2end_tests.sh'],
+                 timeout_seconds=10*60,
+                 environ=_FORCE_ENVIRON_FOR_WRAPPERS))
+    return tests
 
   def pre_build_steps(self):
     return [['tools/run_tests/helper_scripts/pre_build_ruby.sh']]
diff --git a/tools/run_tests/run_tests_matrix.py b/tools/run_tests/run_tests_matrix.py
index b9bf6e5..6c1d4bd 100755
--- a/tools/run_tests/run_tests_matrix.py
+++ b/tools/run_tests/run_tests_matrix.py
@@ -55,7 +55,8 @@
 _REPORT_SUFFIX = 'sponge_log.xml'
 
 
-def _docker_jobspec(name, runtests_args=[], inner_jobs=_DEFAULT_INNER_JOBS):
+def _docker_jobspec(name, runtests_args=[], runtests_envs={},
+                    inner_jobs=_DEFAULT_INNER_JOBS):
   """Run a single instance of run_tests.py in a docker container"""
   test_job = jobset.JobSpec(
           cmdline=['python', 'tools/run_tests/run_tests.py',
@@ -64,16 +65,19 @@
                    '-j', str(inner_jobs),
                    '-x', 'report_%s_%s' % (name, _REPORT_SUFFIX),
                    '--report_suite_name', '%s' % name] + runtests_args,
+          environ=runtests_envs,
           shortname='run_tests_%s' % name,
           timeout_seconds=_RUNTESTS_TIMEOUT)
   return test_job
 
 
-def _workspace_jobspec(name, runtests_args=[], workspace_name=None, inner_jobs=_DEFAULT_INNER_JOBS):
+def _workspace_jobspec(name, runtests_args=[], workspace_name=None,
+                       runtests_envs={}, inner_jobs=_DEFAULT_INNER_JOBS):
   """Run a single instance of run_tests.py in a separate workspace"""
   if not workspace_name:
     workspace_name = 'workspace_%s' % name
   env = {'WORKSPACE_NAME': workspace_name}
+  env.update(runtests_envs)
   test_job = jobset.JobSpec(
           cmdline=['bash',
                    'tools/run_tests/helper_scripts/run_tests_in_workspace.sh',
@@ -89,7 +93,7 @@
 
 def _generate_jobs(languages, configs, platforms, iomgr_platform = 'native',
                   arch=None, compiler=None,
-                  labels=[], extra_args=[],
+                  labels=[], extra_args=[], extra_envs={},
                   inner_jobs=_DEFAULT_INNER_JOBS):
   result = []
   for language in languages:
@@ -103,11 +107,16 @@
           name += '_%s_%s' % (arch, compiler)
           runtests_args += ['--arch', arch,
                             '--compiler', compiler]
+        for extra_env in extra_envs:
+          name += '_%s_%s' % (extra_env, extra_envs[extra_env])
+
         runtests_args += extra_args
         if platform == 'linux':
-          job = _docker_jobspec(name=name, runtests_args=runtests_args, inner_jobs=inner_jobs)
+          job = _docker_jobspec(name=name, runtests_args=runtests_args,
+                                runtests_envs=extra_envs, inner_jobs=inner_jobs)
         else:
-          job = _workspace_jobspec(name=name, runtests_args=runtests_args, inner_jobs=inner_jobs)
+          job = _workspace_jobspec(name=name, runtests_args=runtests_args,
+                                   runtests_envs=extra_envs, inner_jobs=inner_jobs)
 
         job.labels = [platform, config, language, iomgr_platform] + labels
         result.append(job)
@@ -212,6 +221,21 @@
                                   extra_args=extra_args,
                                   inner_jobs=inner_jobs)
 
+  # C and C++ with the c-ares DNS resolver on Linux
+  test_jobs += _generate_jobs(languages=['c', 'c++'],
+                              configs=['dbg'], platforms=['linux'],
+                              labels=['portability'],
+                              extra_args=extra_args,
+                              extra_envs={'GRPC_DNS_RESOLVER': 'ares'})
+
+  # TODO(zyc): Turn on this test after adding c-ares support on windows.
+  # C with the c-ares DNS resolver on Windonws
+  # test_jobs += _generate_jobs(languages=['c'],
+  #                             configs=['dbg'], platforms=['windows'],
+  #                             labels=['portability'],
+  #                             extra_args=extra_args,
+  #                             extra_envs={'GRPC_DNS_RESOLVER': 'ares'})
+
   # cmake build for C and C++
   # TODO(jtattermusch): some of the tests are failing, so we force --build_only
   # to make sure it's buildable at least.
diff --git a/tools/run_tests/sanity/check_submodules.sh b/tools/run_tests/sanity/check_submodules.sh
index 3c5ba16..38dfe27 100755
--- a/tools/run_tests/sanity/check_submodules.sh
+++ b/tools/run_tests/sanity/check_submodules.sh
@@ -49,6 +49,7 @@
  593e917c176b5bc5aafa57bf9f6030d749d91cd5 third_party/protobuf (v3.1.0-alpha-1-326-g593e917)
  bcad91771b7f0bff28a1cac1981d7ef2b9bcef3c third_party/thrift (bcad917)
  50893291621658f355bc5b4d450a8d06a563053d third_party/zlib (v1.2.8)
+ 7691f773af79bf75a62d1863fd0f13ebf9dc51b1 third_party/cares/cares (1.12.0)
 EOF
 
 diff -u $submodules $want_submodules
diff --git a/vsprojects/grpc.sln b/vsprojects/grpc.sln
index 591d3b5..87970e9 100644
--- a/vsprojects/grpc.sln
+++ b/vsprojects/grpc.sln
@@ -3,6 +3,11 @@
 # Visual Studio 2013
 VisualStudioVersion = 12.0.21005.1
 MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "ares", "vcxproj\.\ares\ares.vcxproj", "{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}"
+	ProjectSection(myProperties) = preProject
+        	lib = "True"
+	EndProjectSection
+EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "gen_hpack_tables", "vcxproj\.\gen_hpack_tables\gen_hpack_tables.vcxproj", "{FCDEA4C7-7F26-05DB-D08F-A08F499026E6}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -160,6 +165,22 @@
 		Release-DLL|x64 = Release-DLL|x64
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Debug|Win32.ActiveCfg = Debug|Win32
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Debug|x64.ActiveCfg = Debug|x64
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Release|Win32.ActiveCfg = Release|Win32
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Release|x64.ActiveCfg = Release|x64
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Debug|Win32.Build.0 = Debug|Win32
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Debug|x64.Build.0 = Debug|x64
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Release|Win32.Build.0 = Release|Win32
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Release|x64.Build.0 = Release|x64
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Debug-DLL|x64.Build.0 = Debug|x64
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Release-DLL|Win32.Build.0 = Release|Win32
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Release-DLL|x64.ActiveCfg = Release|x64
+		{1769D06D-F18C-B4C2-B019-31D7F83F3C9A}.Release-DLL|x64.Build.0 = Release|x64
 		{FCDEA4C7-7F26-05DB-D08F-A08F499026E6}.Debug|Win32.ActiveCfg = Debug|Win32
 		{FCDEA4C7-7F26-05DB-D08F-A08F499026E6}.Debug|x64.ActiveCfg = Debug|x64
 		{FCDEA4C7-7F26-05DB-D08F-A08F499026E6}.Release|Win32.ActiveCfg = Release|Win32
diff --git a/vsprojects/vcxproj/ares/ares.vcxproj b/vsprojects/vcxproj/ares/ares.vcxproj
new file mode 100644
index 0000000..811f7c7
--- /dev/null
+++ b/vsprojects/vcxproj/ares/ares.vcxproj
@@ -0,0 +1,284 @@
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diff --git a/vsprojects/vcxproj/ares/ares.vcxproj.filters b/vsprojects/vcxproj/ares/ares.vcxproj.filters
new file mode 100644
index 0000000..282a404
--- /dev/null
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@@ -0,0 +1,245 @@
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+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\ares_iphlpapi.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\ares_ipv6.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\ares_library_init.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\ares_llist.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\ares_nowarn.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\ares_platform.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\ares_private.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\ares_rules.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\ares_setup.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\ares_strcasecmp.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\ares_strdup.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\ares_version.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\bitncmp.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\config-win32.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\cares\setup_once.h">
+      <Filter>third_party\cares\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\ares_build.h">
+      <Filter>third_party\cares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\config_linux\ares_config.h">
+      <Filter>third_party\cares\config_linux</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\cares\config_darwin\ares_config.h">
+      <Filter>third_party\cares\config_darwin</Filter>
+    </ClInclude>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Filter Include="third_party">
+      <UniqueIdentifier>{6463a17d-379b-4a21-51a9-c729ed28c9c1}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="third_party\cares">
+      <UniqueIdentifier>{f5276ab6-c78a-eea3-7ce9-54d2081b3d6a}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="third_party\cares\cares">
+      <UniqueIdentifier>{390f10a8-7730-6295-681d-6fbd990ad488}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="third_party\cares\config_darwin">
+      <UniqueIdentifier>{02918eea-69d3-f65c-08aa-6c6c3dd50c7a}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="third_party\cares\config_linux">
+      <UniqueIdentifier>{8b1c2965-c2f3-d13b-2c35-9e2c298acda5}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+</Project>
+
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index afe7274..7abff21 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -349,6 +349,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_utils.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_windows.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_factory_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_mutator.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_utils.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_utils_posix.h" />
@@ -388,6 +389,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\channel_init.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\channel_stack_type.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue_factory.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\event_string.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\init.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\lame_client.h" />
@@ -479,6 +481,8 @@
     <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_common.h" />
     <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_decode.h" />
     <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_encode.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_ev_driver.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_wrapper.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\load_reporting\load_reporting.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\load_reporting\load_reporting_filter.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\census\aggregation.h" />
@@ -595,6 +599,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_utils.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_factory_posix.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_mutator.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_utils_common_posix.c">
@@ -669,6 +675,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\json\json_writer.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\util\b64.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\slice\percent_encoding.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\slice\slice.c">
@@ -705,6 +713,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue_factory.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\event_string.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\lame_client.c">
@@ -831,8 +841,6 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\transport\tsi_error.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\util\b64.c">
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\util\json_util.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\init_secure.c">
@@ -915,6 +923,12 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\round_robin\round_robin.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\dns_resolver_ares.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_ev_driver_posix.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_wrapper.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\native\dns_resolver.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\sockaddr\sockaddr_resolver.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index a7d32af..aa3e5a7 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -145,6 +145,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_utils.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_factory_posix.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_mutator.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -256,6 +259,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\json\json_writer.c">
       <Filter>src\core\lib\json</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\util\b64.c">
+      <Filter>src\core\lib\security\util</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\slice\percent_encoding.c">
       <Filter>src\core\lib\slice</Filter>
     </ClCompile>
@@ -310,6 +316,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue.c">
       <Filter>src\core\lib\surface</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue_factory.c">
+      <Filter>src\core\lib\surface</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\event_string.c">
       <Filter>src\core\lib\surface</Filter>
     </ClCompile>
@@ -499,9 +508,6 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\transport\tsi_error.c">
       <Filter>src\core\lib\security\transport</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\util\b64.c">
-      <Filter>src\core\lib\security\util</Filter>
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\util\json_util.c">
       <Filter>src\core\lib\security\util</Filter>
     </ClCompile>
@@ -625,6 +631,15 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\round_robin\round_robin.c">
       <Filter>src\core\ext\lb_policy\round_robin</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\dns_resolver_ares.c">
+      <Filter>src\core\ext\resolver\dns\c_ares</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_ev_driver_posix.c">
+      <Filter>src\core\ext\resolver\dns\c_ares</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_wrapper.c">
+      <Filter>src\core\ext\resolver\dns\c_ares</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\native\dns_resolver.c">
       <Filter>src\core\ext\resolver\dns\native</Filter>
     </ClCompile>
@@ -926,6 +941,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_windows.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_factory_posix.h">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_mutator.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
@@ -1043,6 +1061,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue.h">
       <Filter>src\core\lib\surface</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue_factory.h">
+      <Filter>src\core\lib\surface</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\event_string.h">
       <Filter>src\core\lib\surface</Filter>
     </ClInclude>
@@ -1316,6 +1337,12 @@
     <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_encode.h">
       <Filter>third_party\nanopb</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_ev_driver.h">
+      <Filter>src\core\ext\resolver\dns\c_ares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_wrapper.h">
+      <Filter>src\core\ext\resolver\dns\c_ares</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\load_reporting\load_reporting.h">
       <Filter>src\core\ext\load_reporting</Filter>
     </ClInclude>
@@ -1436,6 +1463,9 @@
     <Filter Include="src\core\ext\resolver\dns">
       <UniqueIdentifier>{e8fe6413-ab8c-48d5-2c7b-aa79e3db4ab2}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\ext\resolver\dns\c_ares">
+      <UniqueIdentifier>{2b72688f-79b8-05dd-2896-c7d5dec07dd6}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\core\ext\resolver\dns\native">
       <UniqueIdentifier>{94e34be0-29d2-1731-3c1e-617ec4986acb}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
index 62969e3..9f3743b 100644
--- a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
+++ b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
@@ -244,6 +244,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_utils.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_windows.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_factory_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_mutator.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_utils.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_utils_posix.h" />
@@ -283,6 +284,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\channel_init.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\channel_stack_type.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue_factory.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\event_string.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\init.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\lame_client.h" />
@@ -438,6 +440,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_utils.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_factory_posix.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_mutator.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_utils_common_posix.c">
@@ -512,6 +516,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\json\json_writer.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\util\b64.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\slice\percent_encoding.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\slice\slice.c">
@@ -548,6 +554,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue_factory.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\event_string.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\lame_client.c">
diff --git a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
index 3008810..bc52644 100644
--- a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
@@ -202,6 +202,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_utils.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_factory_posix.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_mutator.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -313,6 +316,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\json\json_writer.c">
       <Filter>src\core\lib\json</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\util\b64.c">
+      <Filter>src\core\lib\security\util</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\slice\percent_encoding.c">
       <Filter>src\core\lib\slice</Filter>
     </ClCompile>
@@ -367,6 +373,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue.c">
       <Filter>src\core\lib\surface</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue_factory.c">
+      <Filter>src\core\lib\surface</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\event_string.c">
       <Filter>src\core\lib\surface</Filter>
     </ClCompile>
@@ -713,6 +722,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_windows.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_factory_posix.h">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_mutator.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
@@ -830,6 +842,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue.h">
       <Filter>src\core\lib\surface</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue_factory.h">
+      <Filter>src\core\lib\surface</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\event_string.h">
       <Filter>src\core\lib\surface</Filter>
     </ClInclude>
@@ -929,6 +944,12 @@
     <Filter Include="src\core\lib\json">
       <UniqueIdentifier>{89bc8f83-e29a-ddab-8f6b-22df11cdc867}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\lib\security">
+      <UniqueIdentifier>{83d9c8a0-c579-769e-e2df-270c67b8c159}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\lib\security\util">
+      <UniqueIdentifier>{d55417ff-35a3-ef69-80c4-e6a95673728b}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\core\lib\slice">
       <UniqueIdentifier>{4d172bbc-20c4-6e7d-872a-2d287b589aa0}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index 4606913..1a0c38c 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -339,6 +339,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_utils.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_windows.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_factory_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_mutator.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_utils.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_utils_posix.h" />
@@ -378,6 +379,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\channel_init.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\channel_stack_type.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue_factory.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\event_string.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\init.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\lame_client.h" />
@@ -436,6 +438,8 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\client_channel\subchannel.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\client_channel\subchannel_index.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\client_channel\uri_parser.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_ev_driver.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_wrapper.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\load_reporting\load_reporting.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\load_reporting\load_reporting_filter.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\grpclb.h" />
@@ -562,6 +566,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_utils.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_factory_posix.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_mutator.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_utils_common_posix.c">
@@ -636,6 +642,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\json\json_writer.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\util\b64.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\slice\percent_encoding.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\slice\slice.c">
@@ -672,6 +680,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue_factory.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\event_string.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\lame_client.c">
@@ -804,6 +814,12 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\client_channel\uri_parser.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\dns_resolver_ares.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_ev_driver_posix.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_wrapper.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\native\dns_resolver.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\sockaddr\sockaddr_resolver.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index d658f4d..b11766e 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -148,6 +148,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_utils.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_factory_posix.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_mutator.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -259,6 +262,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\json\json_writer.c">
       <Filter>src\core\lib\json</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\util\b64.c">
+      <Filter>src\core\lib\security\util</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\slice\percent_encoding.c">
       <Filter>src\core\lib\slice</Filter>
     </ClCompile>
@@ -313,6 +319,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue.c">
       <Filter>src\core\lib\surface</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue_factory.c">
+      <Filter>src\core\lib\surface</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\event_string.c">
       <Filter>src\core\lib\surface</Filter>
     </ClCompile>
@@ -511,6 +520,15 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\client_channel\uri_parser.c">
       <Filter>src\core\ext\client_channel</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\dns_resolver_ares.c">
+      <Filter>src\core\ext\resolver\dns\c_ares</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_ev_driver_posix.c">
+      <Filter>src\core\ext\resolver\dns\c_ares</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_wrapper.c">
+      <Filter>src\core\ext\resolver\dns\c_ares</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\resolver\dns\native\dns_resolver.c">
       <Filter>src\core\ext\resolver\dns\native</Filter>
     </ClCompile>
@@ -836,6 +854,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\sockaddr_windows.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_factory_posix.h">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\socket_mutator.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
@@ -953,6 +974,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue.h">
       <Filter>src\core\lib\surface</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\completion_queue_factory.h">
+      <Filter>src\core\lib\surface</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\event_string.h">
       <Filter>src\core\lib\surface</Filter>
     </ClInclude>
@@ -1127,6 +1151,12 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\client_channel\uri_parser.h">
       <Filter>src\core\ext\client_channel</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_ev_driver.h">
+      <Filter>src\core\ext\resolver\dns\c_ares</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\resolver\dns\c_ares\grpc_ares_wrapper.h">
+      <Filter>src\core\ext\resolver\dns\c_ares</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\load_reporting\load_reporting.h">
       <Filter>src\core\ext\load_reporting</Filter>
     </ClInclude>
@@ -1271,6 +1301,9 @@
     <Filter Include="src\core\ext\resolver\dns">
       <UniqueIdentifier>{2e0a9b4f-6394-7c0e-6e5a-0f8b3ee29b41}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\ext\resolver\dns\c_ares">
+      <UniqueIdentifier>{932d8afd-e042-46d0-30c5-1c45386165d9}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\core\ext\resolver\dns\native">
       <UniqueIdentifier>{3d5398c8-928b-9096-8eb7-f8c40ee68c4d}</UniqueIdentifier>
     </Filter>
@@ -1322,6 +1355,12 @@
     <Filter Include="src\core\lib\json">
       <UniqueIdentifier>{681cdaeb-c47f-8853-d985-bf13c2873947}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\lib\security">
+      <UniqueIdentifier>{02c849c5-66eb-e42f-c9f7-2cf7cc9db06a}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\lib\security\util">
+      <UniqueIdentifier>{c22aef1f-8b7b-6b5c-9e22-321b11f6352d}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\core\lib\slice">
       <UniqueIdentifier>{74c81ab7-e329-a362-3890-4c41b90f0511}</UniqueIdentifier>
     </Filter>