diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6100057..24b84fd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -440,6 +440,7 @@
 add_dependencies(buildtests_c multiple_server_queues_test)
 add_dependencies(buildtests_c murmur_hash_test)
 add_dependencies(buildtests_c no_server_test)
+add_dependencies(buildtests_c parse_address_test)
 add_dependencies(buildtests_c percent_encoding_test)
 if(_gRPC_PLATFORM_LINUX)
 add_dependencies(buildtests_c pollset_set_test)
@@ -464,6 +465,7 @@
 add_dependencies(buildtests_c socket_utils_test)
 endif()
 add_dependencies(buildtests_c status_conversion_test)
+add_dependencies(buildtests_c stream_owned_slice_test)
 if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
 add_dependencies(buildtests_c tcp_client_posix_test)
 endif()
@@ -6492,6 +6494,33 @@
 endif (gRPC_BUILD_TESTS)
 if (gRPC_BUILD_TESTS)
 
+add_executable(parse_address_test
+  test/core/client_channel/parse_address_test.c
+)
+
+
+target_include_directories(parse_address_test
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
+  PRIVATE ${BORINGSSL_ROOT_DIR}/include
+  PRIVATE ${PROTOBUF_ROOT_DIR}/src
+  PRIVATE ${BENCHMARK_ROOT_DIR}/include
+  PRIVATE ${ZLIB_ROOT_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
+)
+
+target_link_libraries(parse_address_test
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+  grpc_test_util
+  grpc
+  gpr_test_util
+  gpr
+)
+
+endif (gRPC_BUILD_TESTS)
+if (gRPC_BUILD_TESTS)
+
 add_executable(percent_encoding_test
   test/core/slice/percent_encoding_test.c
 )
@@ -6984,6 +7013,33 @@
 
 endif (gRPC_BUILD_TESTS)
 if (gRPC_BUILD_TESTS)
+
+add_executable(stream_owned_slice_test
+  test/core/transport/stream_owned_slice_test.c
+)
+
+
+target_include_directories(stream_owned_slice_test
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
+  PRIVATE ${BORINGSSL_ROOT_DIR}/include
+  PRIVATE ${PROTOBUF_ROOT_DIR}/src
+  PRIVATE ${BENCHMARK_ROOT_DIR}/include
+  PRIVATE ${ZLIB_ROOT_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
+)
+
+target_link_libraries(stream_owned_slice_test
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+  grpc_test_util
+  grpc
+  gpr_test_util
+  gpr
+)
+
+endif (gRPC_BUILD_TESTS)
+if (gRPC_BUILD_TESTS)
 if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
 
 add_executable(tcp_client_posix_test
diff --git a/Makefile b/Makefile
index ec71d8c..a49fa92 100644
--- a/Makefile
+++ b/Makefile
@@ -1002,6 +1002,7 @@
 nanopb_fuzzer_response_test: $(BINDIR)/$(CONFIG)/nanopb_fuzzer_response_test
 nanopb_fuzzer_serverlist_test: $(BINDIR)/$(CONFIG)/nanopb_fuzzer_serverlist_test
 no_server_test: $(BINDIR)/$(CONFIG)/no_server_test
+parse_address_test: $(BINDIR)/$(CONFIG)/parse_address_test
 percent_decode_fuzzer: $(BINDIR)/$(CONFIG)/percent_decode_fuzzer
 percent_encode_fuzzer: $(BINDIR)/$(CONFIG)/percent_encode_fuzzer
 percent_encoding_test: $(BINDIR)/$(CONFIG)/percent_encoding_test
@@ -1024,6 +1025,7 @@
 socket_utils_test: $(BINDIR)/$(CONFIG)/socket_utils_test
 ssl_server_fuzzer: $(BINDIR)/$(CONFIG)/ssl_server_fuzzer
 status_conversion_test: $(BINDIR)/$(CONFIG)/status_conversion_test
+stream_owned_slice_test: $(BINDIR)/$(CONFIG)/stream_owned_slice_test
 tcp_client_posix_test: $(BINDIR)/$(CONFIG)/tcp_client_posix_test
 tcp_client_uv_test: $(BINDIR)/$(CONFIG)/tcp_client_uv_test
 tcp_posix_test: $(BINDIR)/$(CONFIG)/tcp_posix_test
@@ -1363,6 +1365,7 @@
   $(BINDIR)/$(CONFIG)/multiple_server_queues_test \
   $(BINDIR)/$(CONFIG)/murmur_hash_test \
   $(BINDIR)/$(CONFIG)/no_server_test \
+  $(BINDIR)/$(CONFIG)/parse_address_test \
   $(BINDIR)/$(CONFIG)/percent_encoding_test \
   $(BINDIR)/$(CONFIG)/pollset_set_test \
   $(BINDIR)/$(CONFIG)/resolve_address_posix_test \
@@ -1381,6 +1384,7 @@
   $(BINDIR)/$(CONFIG)/sockaddr_utils_test \
   $(BINDIR)/$(CONFIG)/socket_utils_test \
   $(BINDIR)/$(CONFIG)/status_conversion_test \
+  $(BINDIR)/$(CONFIG)/stream_owned_slice_test \
   $(BINDIR)/$(CONFIG)/tcp_client_posix_test \
   $(BINDIR)/$(CONFIG)/tcp_client_uv_test \
   $(BINDIR)/$(CONFIG)/tcp_posix_test \
@@ -1802,6 +1806,8 @@
 	$(Q) $(BINDIR)/$(CONFIG)/murmur_hash_test || ( echo test murmur_hash_test failed ; exit 1 )
 	$(E) "[RUN]     Testing no_server_test"
 	$(Q) $(BINDIR)/$(CONFIG)/no_server_test || ( echo test no_server_test failed ; exit 1 )
+	$(E) "[RUN]     Testing parse_address_test"
+	$(Q) $(BINDIR)/$(CONFIG)/parse_address_test || ( echo test parse_address_test failed ; exit 1 )
 	$(E) "[RUN]     Testing percent_encoding_test"
 	$(Q) $(BINDIR)/$(CONFIG)/percent_encoding_test || ( echo test percent_encoding_test failed ; exit 1 )
 	$(E) "[RUN]     Testing pollset_set_test"
@@ -1838,6 +1844,8 @@
 	$(Q) $(BINDIR)/$(CONFIG)/socket_utils_test || ( echo test socket_utils_test failed ; exit 1 )
 	$(E) "[RUN]     Testing status_conversion_test"
 	$(Q) $(BINDIR)/$(CONFIG)/status_conversion_test || ( echo test status_conversion_test failed ; exit 1 )
+	$(E) "[RUN]     Testing stream_owned_slice_test"
+	$(Q) $(BINDIR)/$(CONFIG)/stream_owned_slice_test || ( echo test stream_owned_slice_test failed ; exit 1 )
 	$(E) "[RUN]     Testing tcp_client_posix_test"
 	$(Q) $(BINDIR)/$(CONFIG)/tcp_client_posix_test || ( echo test tcp_client_posix_test failed ; exit 1 )
 	$(E) "[RUN]     Testing tcp_client_uv_test"
@@ -11143,6 +11151,38 @@
 endif
 
 
+PARSE_ADDRESS_TEST_SRC = \
+    test/core/client_channel/parse_address_test.c \
+
+PARSE_ADDRESS_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(PARSE_ADDRESS_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/parse_address_test: openssl_dep_error
+
+else
+
+
+
+$(BINDIR)/$(CONFIG)/parse_address_test: $(PARSE_ADDRESS_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(PARSE_ADDRESS_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/parse_address_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/client_channel/parse_address_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_parse_address_test: $(PARSE_ADDRESS_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(PARSE_ADDRESS_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 PERCENT_DECODE_FUZZER_SRC = \
     test/core/slice/percent_decode_fuzzer.c \
 
@@ -11847,6 +11887,38 @@
 endif
 
 
+STREAM_OWNED_SLICE_TEST_SRC = \
+    test/core/transport/stream_owned_slice_test.c \
+
+STREAM_OWNED_SLICE_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(STREAM_OWNED_SLICE_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/stream_owned_slice_test: openssl_dep_error
+
+else
+
+
+
+$(BINDIR)/$(CONFIG)/stream_owned_slice_test: $(STREAM_OWNED_SLICE_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(STREAM_OWNED_SLICE_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/stream_owned_slice_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/transport/stream_owned_slice_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_stream_owned_slice_test: $(STREAM_OWNED_SLICE_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(STREAM_OWNED_SLICE_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 TCP_CLIENT_POSIX_TEST_SRC = \
     test/core/iomgr/tcp_client_posix_test.c \
 
diff --git a/bazel/cc_grpc_library.bzl b/bazel/cc_grpc_library.bzl
index 9020eac..b9d7eb5 100644
--- a/bazel/cc_grpc_library.bzl
+++ b/bazel/cc_grpc_library.bzl
@@ -2,7 +2,7 @@
 
 load("//:bazel/generate_cc.bzl", "generate_cc")
 
-def cc_grpc_library(name, srcs, deps, proto_only, **kwargs):
+def cc_grpc_library(name, srcs, deps, proto_only, use_external = False, **kwargs):
   """Generates C++ grpc classes from a .proto file.
 
   Assumes the generated classes will be used in cc_api_version = 2.
@@ -12,6 +12,8 @@
       srcs: a single proto_library, which wraps the .proto files with services.
       deps: a list of C++ proto_library (or cc_proto_library) which provides
         the compiled code of any message that the services depend on.
+      use_external: When True the grpc deps are prefixed with //external. This
+        allows grpc to be used as a dependency in other bazel projects.
       **kwargs: rest of arguments, e.g., compatible_with and visibility.
   """
   if len(srcs) > 1:
@@ -37,18 +39,31 @@
   )
 
   if not proto_only:
+    if use_external:
+      # when this file is used by non-grpc projects
+      plugin = "//external:grpc_cpp_plugin"
+    else:
+      plugin = "//:grpc_cpp_plugin"
+
     generate_cc(
         name = codegen_grpc_target,
         srcs = [proto_target],
-        plugin = "//:grpc_cpp_plugin",
+        plugin = plugin,
         **kwargs
     )
 
+    if use_external:
+      # when this file is used by non-grpc projects
+      grpc_deps = ["//external:grpc++", "//external:grpc++_codegen_proto",
+                   "//external:protobuf"]
+    else:
+      grpc_deps = ["//:grpc++", "//:grpc++_codegen_proto", "//external:protobuf"]
+
     native.cc_library(
         name = name,
         srcs = [":" + codegen_grpc_target, ":" + codegen_target],
         hdrs = [":" + codegen_grpc_target, ":" + codegen_target],
-        deps = deps + ["//:grpc++", "//:grpc++_codegen_proto", "//external:protobuf"],
+        deps = deps + grpc_deps,
         **kwargs
     )
   else:
diff --git a/bazel/grpc_build_system.bzl b/bazel/grpc_build_system.bzl
index daf8b78..855d2d7 100644
--- a/bazel/grpc_build_system.bzl
+++ b/bazel/grpc_build_system.bzl
@@ -58,11 +58,12 @@
 
 load("//:bazel/cc_grpc_library.bzl", "cc_grpc_library")
 
-def grpc_proto_library(name, srcs = [], deps = [], well_known_deps = [], has_services = True):
+def grpc_proto_library(name, srcs = [], deps = [], well_known_deps = [], has_services = True, use_external = False):
   cc_grpc_library(
     name = name,
     srcs = srcs,
     deps = deps,
     proto_only = not has_services,
+    use_external = use_external,
   )
 
diff --git a/binding.gyp b/binding.gyp
index 6fbe59b..c521a27 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -43,7 +43,11 @@
     # 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'
+    'grpc_uv%': 'false',
+    # 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.
+    'grpc_alpn%': 'true'
   },
   'target_defaults': {
     'include_dirs': [
@@ -73,10 +77,16 @@
           'OPENSSL_NO_ASM'
         ]
       }, {
-        # As of the beginning of 2017, we only support versions of Node with
-        # embedded versions of OpenSSL that support ALPN
-        'defines': [
-          'TSI_OPENSSL_ALPN_SUPPORT=1'
+        'conditions': [
+          ['grpc_alpn=="true"', {
+            'defines': [
+              'TSI_OPENSSL_ALPN_SUPPORT=1'
+            ],
+          }, {
+            'defines': [
+              'TSI_OPENSSL_ALPN_SUPPORT=0'
+            ],
+          }]
         ],
         'include_dirs': [
           '<(node_root_dir)/deps/openssl/openssl/include',
diff --git a/build.yaml b/build.yaml
index 8a6abb6..106e876 100644
--- a/build.yaml
+++ b/build.yaml
@@ -2506,6 +2506,16 @@
   - grpc
   - gpr_test_util
   - gpr
+- name: parse_address_test
+  build: test
+  language: c
+  src:
+  - test/core/client_channel/parse_address_test.c
+  deps:
+  - grpc_test_util
+  - grpc
+  - gpr_test_util
+  - gpr
 - name: percent_decode_fuzzer
   build: fuzzer
   language: c
@@ -2762,6 +2772,16 @@
   - grpc
   - gpr_test_util
   - gpr
+- name: stream_owned_slice_test
+  build: test
+  language: c
+  src:
+  - test/core/transport/stream_owned_slice_test.c
+  deps:
+  - grpc_test_util
+  - grpc
+  - gpr_test_util
+  - gpr
 - name: tcp_client_posix_test
   cpu_cost: 0.5
   build: test
diff --git a/doc/PROTOCOL-WEB.md b/doc/PROTOCOL-WEB.md
index 0b54e0f..5f01af3 100644
--- a/doc/PROTOCOL-WEB.md
+++ b/doc/PROTOCOL-WEB.md
@@ -94,8 +94,6 @@
 to security policies with XHR
   * Accept: application/grpc-web-text
 2. The default text encoding is base64
-  * Text encoding may be specified with Content-Type or Accept headers as
-      * application/grpc-web-text-base64
   * Note that “Content-Transfer-Encoding: base64” should not be used.
   Due to in-stream base64 padding when delimiting messages, the entire
   response body is not necessarily a valid base64-encoded entity
diff --git a/setup.py b/setup.py
index 234252a..d5b843f 100644
--- a/setup.py
+++ b/setup.py
@@ -209,7 +209,7 @@
     'enum34>=1.0.4',
     # TODO(atash): eventually split the grpcio package into a metapackage
     # depending on protobuf and the runtime component (independent of protobuf)
-    'protobuf>=3.0.0',
+    'protobuf>=3.2.0',
 )
 
 if not PY3:
diff --git a/src/compiler/cpp_generator.cc b/src/compiler/cpp_generator.cc
index e481aaf..2908b63 100644
--- a/src/compiler/cpp_generator.cc
+++ b/src/compiler/cpp_generator.cc
@@ -102,7 +102,7 @@
     vars["filename_base"] = file->filename_without_ext();
     vars["message_header_ext"] = file->message_header_ext();
 
-    printer->Print(vars, "// Generated by the gRPC protobuf plugin.\n");
+    printer->Print(vars, "// Generated by the gRPC C++ plugin.\n");
     printer->Print(vars,
                    "// If you make any local change, they will be lost.\n");
     printer->Print(vars, "// source: $filename$\n");
@@ -1010,7 +1010,7 @@
     vars["message_header_ext"] = file->message_header_ext();
     vars["service_header_ext"] = file->service_header_ext();
 
-    printer->Print(vars, "// Generated by the gRPC protobuf plugin.\n");
+    printer->Print(vars, "// Generated by the gRPC C++ plugin.\n");
     printer->Print(vars,
                    "// If you make any local change, they will be lost.\n");
     printer->Print(vars, "// source: $filename$\n\n");
diff --git a/src/core/ext/client_channel/client_channel_plugin.c b/src/core/ext/client_channel/client_channel_plugin.c
index 6f9df3e..28d3b63 100644
--- a/src/core/ext/client_channel/client_channel_plugin.c
+++ b/src/core/ext/client_channel/client_channel_plugin.c
@@ -64,7 +64,7 @@
     }
   }
   char *default_authority = grpc_get_default_authority(
-      grpc_channel_stack_builder_get_target(builder));
+      exec_ctx, grpc_channel_stack_builder_get_target(builder));
   if (default_authority != NULL) {
     grpc_arg arg;
     arg.type = GRPC_ARG_STRING;
diff --git a/src/core/ext/client_channel/http_proxy.c b/src/core/ext/client_channel/http_proxy.c
index bbe4ff5..e280cef 100644
--- a/src/core/ext/client_channel/http_proxy.c
+++ b/src/core/ext/client_channel/http_proxy.c
@@ -46,10 +46,11 @@
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/support/env.h"
 
-static char* grpc_get_http_proxy_server() {
+static char* grpc_get_http_proxy_server(grpc_exec_ctx* exec_ctx) {
   char* uri_str = gpr_getenv("http_proxy");
   if (uri_str == NULL) return NULL;
-  grpc_uri* uri = grpc_uri_parse(uri_str, false /* suppress_errors */);
+  grpc_uri* uri =
+      grpc_uri_parse(exec_ctx, uri_str, false /* suppress_errors */);
   char* proxy_name = NULL;
   if (uri == NULL || uri->authority == NULL) {
     gpr_log(GPR_ERROR, "cannot parse value of 'http_proxy' env var");
@@ -76,9 +77,10 @@
                                   const grpc_channel_args* args,
                                   char** name_to_resolve,
                                   grpc_channel_args** new_args) {
-  *name_to_resolve = grpc_get_http_proxy_server();
+  *name_to_resolve = grpc_get_http_proxy_server(exec_ctx);
   if (*name_to_resolve == NULL) return false;
-  grpc_uri* uri = grpc_uri_parse(server_uri, false /* suppress_errors */);
+  grpc_uri* uri =
+      grpc_uri_parse(exec_ctx, server_uri, false /* suppress_errors */);
   if (uri == NULL || uri->path[0] == '\0') {
     gpr_log(GPR_ERROR,
             "'http_proxy' environment variable set, but cannot "
diff --git a/src/core/ext/client_channel/parse_address.c b/src/core/ext/client_channel/parse_address.c
index 8e4da03..8ae15fc 100644
--- a/src/core/ext/client_channel/parse_address.c
+++ b/src/core/ext/client_channel/parse_address.c
@@ -44,6 +44,7 @@
 #include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
+#include "src/core/lib/support/string.h"
 
 #ifdef GRPC_HAVE_UNIX_SOCKET
 
@@ -120,9 +121,30 @@
   memset(in6, 0, sizeof(*in6));
   resolved_addr->len = sizeof(*in6);
   in6->sin6_family = AF_INET6;
-  if (inet_pton(AF_INET6, host, &in6->sin6_addr) == 0) {
-    gpr_log(GPR_ERROR, "invalid ipv6 address: '%s'", host);
-    goto done;
+
+  /* Handle the RFC6874 syntax for IPv6 zone identifiers. */
+  char *host_end = (char *)gpr_memrchr(host, '%', strlen(host));
+  if (host_end != NULL) {
+    GPR_ASSERT(host_end >= host);
+    char host_without_scope[INET6_ADDRSTRLEN];
+    size_t host_without_scope_len = (size_t)(host_end - host);
+    strncpy(host_without_scope, host, host_without_scope_len);
+    host_without_scope[host_without_scope_len] = '\0';
+    if (inet_pton(AF_INET6, host_without_scope, &in6->sin6_addr) == 0) {
+      gpr_log(GPR_ERROR, "invalid ipv6 address: '%s'", host_without_scope);
+      goto done;
+    }
+    if (gpr_parse_bytes_to_uint32(host_end + 1,
+                                  strlen(host) - host_without_scope_len - 1,
+                                  &in6->sin6_scope_id) == 0) {
+      gpr_log(GPR_ERROR, "invalid ipv6 scope id: '%s'", host_end + 1);
+      goto done;
+    }
+  } else {
+    if (inet_pton(AF_INET6, host, &in6->sin6_addr) == 0) {
+      gpr_log(GPR_ERROR, "invalid ipv6 address: '%s'", host);
+      goto done;
+    }
   }
 
   if (port != NULL) {
diff --git a/src/core/ext/client_channel/resolver_registry.c b/src/core/ext/client_channel/resolver_registry.c
index f8e8bc9..3c5a6fb 100644
--- a/src/core/ext/client_channel/resolver_registry.c
+++ b/src/core/ext/client_channel/resolver_registry.c
@@ -108,22 +108,23 @@
   return lookup_factory(uri->scheme);
 }
 
-static grpc_resolver_factory *resolve_factory(const char *target,
+static grpc_resolver_factory *resolve_factory(grpc_exec_ctx *exec_ctx,
+                                              const char *target,
                                               grpc_uri **uri,
                                               char **canonical_target) {
   grpc_resolver_factory *factory = NULL;
 
   GPR_ASSERT(uri != NULL);
-  *uri = grpc_uri_parse(target, 1);
+  *uri = grpc_uri_parse(exec_ctx, target, 1);
   factory = lookup_factory_by_uri(*uri);
   if (factory == NULL) {
     grpc_uri_destroy(*uri);
     gpr_asprintf(canonical_target, "%s%s", g_default_resolver_prefix, target);
-    *uri = grpc_uri_parse(*canonical_target, 1);
+    *uri = grpc_uri_parse(exec_ctx, *canonical_target, 1);
     factory = lookup_factory_by_uri(*uri);
     if (factory == NULL) {
-      grpc_uri_destroy(grpc_uri_parse(target, 0));
-      grpc_uri_destroy(grpc_uri_parse(*canonical_target, 0));
+      grpc_uri_destroy(grpc_uri_parse(exec_ctx, target, 0));
+      grpc_uri_destroy(grpc_uri_parse(exec_ctx, *canonical_target, 0));
       gpr_log(GPR_ERROR, "don't know how to resolve '%s' or '%s'", target,
               *canonical_target);
     }
@@ -138,7 +139,7 @@
   grpc_uri *uri = NULL;
   char *canonical_target = NULL;
   grpc_resolver_factory *factory =
-      resolve_factory(target, &uri, &canonical_target);
+      resolve_factory(exec_ctx, target, &uri, &canonical_target);
   grpc_resolver *resolver;
   grpc_resolver_args resolver_args;
   memset(&resolver_args, 0, sizeof(resolver_args));
@@ -153,21 +154,22 @@
   return resolver;
 }
 
-char *grpc_get_default_authority(const char *target) {
+char *grpc_get_default_authority(grpc_exec_ctx *exec_ctx, const char *target) {
   grpc_uri *uri = NULL;
   char *canonical_target = NULL;
   grpc_resolver_factory *factory =
-      resolve_factory(target, &uri, &canonical_target);
+      resolve_factory(exec_ctx, target, &uri, &canonical_target);
   char *authority = grpc_resolver_factory_get_default_authority(factory, uri);
   grpc_uri_destroy(uri);
   gpr_free(canonical_target);
   return authority;
 }
 
-char *grpc_resolver_factory_add_default_prefix_if_needed(const char *target) {
+char *grpc_resolver_factory_add_default_prefix_if_needed(
+    grpc_exec_ctx *exec_ctx, const char *target) {
   grpc_uri *uri = NULL;
   char *canonical_target = NULL;
-  resolve_factory(target, &uri, &canonical_target);
+  resolve_factory(exec_ctx, target, &uri, &canonical_target);
   grpc_uri_destroy(uri);
   return canonical_target == NULL ? gpr_strdup(target) : canonical_target;
 }
diff --git a/src/core/ext/client_channel/resolver_registry.h b/src/core/ext/client_channel/resolver_registry.h
index e2c189c..1a3ebee 100644
--- a/src/core/ext/client_channel/resolver_registry.h
+++ b/src/core/ext/client_channel/resolver_registry.h
@@ -74,10 +74,11 @@
 
 /** Given a target, return a (freshly allocated with gpr_malloc) string
     representing the default authority to pass from a client. */
-char *grpc_get_default_authority(const char *target);
+char *grpc_get_default_authority(grpc_exec_ctx *exec_ctx, const char *target);
 
 /** Returns a newly allocated string containing \a target, adding the
     default prefix if needed. */
-char *grpc_resolver_factory_add_default_prefix_if_needed(const char *target);
+char *grpc_resolver_factory_add_default_prefix_if_needed(
+    grpc_exec_ctx *exec_ctx, const char *target);
 
 #endif /* GRPC_CORE_EXT_CLIENT_CHANNEL_RESOLVER_REGISTRY_H */
diff --git a/src/core/ext/client_channel/subchannel.c b/src/core/ext/client_channel/subchannel.c
index cb2d2c8..5df0a90 100644
--- a/src/core/ext/client_channel/subchannel.c
+++ b/src/core/ext/client_channel/subchannel.c
@@ -331,7 +331,7 @@
   }
   c->pollset_set = grpc_pollset_set_create();
   grpc_resolved_address *addr = gpr_malloc(sizeof(*addr));
-  grpc_get_subchannel_address_arg(args->args, addr);
+  grpc_get_subchannel_address_arg(exec_ctx, args->args, addr);
   grpc_set_initial_connect_string(&addr, &c->initial_connect_string);
   grpc_resolved_address *new_address = NULL;
   grpc_channel_args *new_args = NULL;
@@ -787,9 +787,9 @@
   return SUBCHANNEL_CALL_TO_CALL_STACK(subchannel_call);
 }
 
-static void grpc_uri_to_sockaddr(const char *uri_str,
+static void grpc_uri_to_sockaddr(grpc_exec_ctx *exec_ctx, const char *uri_str,
                                  grpc_resolved_address *addr) {
-  grpc_uri *uri = grpc_uri_parse(uri_str, 0 /* suppress_errors */);
+  grpc_uri *uri = grpc_uri_parse(exec_ctx, uri_str, 0 /* suppress_errors */);
   GPR_ASSERT(uri != NULL);
   if (strcmp(uri->scheme, "ipv4") == 0) {
     GPR_ASSERT(parse_ipv4(uri, addr));
@@ -801,12 +801,13 @@
   grpc_uri_destroy(uri);
 }
 
-void grpc_get_subchannel_address_arg(const grpc_channel_args *args,
+void grpc_get_subchannel_address_arg(grpc_exec_ctx *exec_ctx,
+                                     const grpc_channel_args *args,
                                      grpc_resolved_address *addr) {
   const char *addr_uri_str = grpc_get_subchannel_address_uri_arg(args);
   memset(addr, 0, sizeof(*addr));
   if (*addr_uri_str != '\0') {
-    grpc_uri_to_sockaddr(addr_uri_str, addr);
+    grpc_uri_to_sockaddr(exec_ctx, addr_uri_str, addr);
   }
 }
 
diff --git a/src/core/ext/client_channel/subchannel.h b/src/core/ext/client_channel/subchannel.h
index 26ce954..6a70a76 100644
--- a/src/core/ext/client_channel/subchannel.h
+++ b/src/core/ext/client_channel/subchannel.h
@@ -175,7 +175,8 @@
                                         const grpc_subchannel_args *args);
 
 /// Sets \a addr from \a args.
-void grpc_get_subchannel_address_arg(const grpc_channel_args *args,
+void grpc_get_subchannel_address_arg(grpc_exec_ctx *exec_ctx,
+                                     const grpc_channel_args *args,
                                      grpc_resolved_address *addr);
 
 /// Returns the URI string for the address to connect to.
diff --git a/src/core/ext/client_channel/uri_parser.c b/src/core/ext/client_channel/uri_parser.c
index 7dd7b75..d385db0 100644
--- a/src/core/ext/client_channel/uri_parser.c
+++ b/src/core/ext/client_channel/uri_parser.c
@@ -35,13 +35,15 @@
 
 #include <string.h>
 
-#include <grpc/slice.h>
 #include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/port_platform.h>
 #include <grpc/support/string_util.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"
 #include "src/core/lib/support/string.h"
 
 /** a size_t default value... maps to all 1's */
@@ -68,11 +70,16 @@
   return NULL;
 }
 
-/** Returns a copy of \a src[begin, end) */
-static char *copy_component(const char *src, size_t begin, size_t end) {
-  char *out = gpr_malloc(end - begin + 1);
-  memcpy(out, src + begin, end - begin);
-  out[end - begin] = 0;
+/** Returns a copy of percent decoded \a src[begin, end) */
+static char *decode_and_copy_component(grpc_exec_ctx *exec_ctx, const char *src,
+                                       size_t begin, size_t end) {
+  grpc_slice component =
+      grpc_slice_from_copied_buffer(src + begin, end - begin);
+  grpc_slice decoded_component =
+      grpc_permissive_percent_decode_slice(component);
+  char *out = grpc_dump_slice(decoded_component, GPR_DUMP_ASCII);
+  grpc_slice_unref_internal(exec_ctx, component);
+  grpc_slice_unref_internal(exec_ctx, decoded_component);
   return out;
 }
 
@@ -175,7 +182,8 @@
   }
 }
 
-grpc_uri *grpc_uri_parse(const char *uri_text, int suppress_errors) {
+grpc_uri *grpc_uri_parse(grpc_exec_ctx *exec_ctx, const char *uri_text,
+                         int suppress_errors) {
   grpc_uri *uri;
   size_t scheme_begin = 0;
   size_t scheme_end = NOT_SET;
@@ -263,11 +271,16 @@
   }
 
   uri = gpr_zalloc(sizeof(*uri));
-  uri->scheme = copy_component(uri_text, scheme_begin, scheme_end);
-  uri->authority = copy_component(uri_text, authority_begin, authority_end);
-  uri->path = copy_component(uri_text, path_begin, path_end);
-  uri->query = copy_component(uri_text, query_begin, query_end);
-  uri->fragment = copy_component(uri_text, fragment_begin, fragment_end);
+  uri->scheme =
+      decode_and_copy_component(exec_ctx, uri_text, scheme_begin, scheme_end);
+  uri->authority = decode_and_copy_component(exec_ctx, uri_text,
+                                             authority_begin, authority_end);
+  uri->path =
+      decode_and_copy_component(exec_ctx, uri_text, path_begin, path_end);
+  uri->query =
+      decode_and_copy_component(exec_ctx, uri_text, query_begin, query_end);
+  uri->fragment = decode_and_copy_component(exec_ctx, uri_text, fragment_begin,
+                                            fragment_end);
   parse_query_parts(uri);
 
   return uri;
diff --git a/src/core/ext/client_channel/uri_parser.h b/src/core/ext/client_channel/uri_parser.h
index 5fe0e8f..efd4302 100644
--- a/src/core/ext/client_channel/uri_parser.h
+++ b/src/core/ext/client_channel/uri_parser.h
@@ -35,6 +35,7 @@
 #define GRPC_CORE_EXT_CLIENT_CHANNEL_URI_PARSER_H
 
 #include <stddef.h>
+#include "src/core/lib/iomgr/exec_ctx.h"
 
 typedef struct {
   char *scheme;
@@ -51,7 +52,8 @@
 } grpc_uri;
 
 /** parse a uri, return NULL on failure */
-grpc_uri *grpc_uri_parse(const char *uri_text, int suppress_errors);
+grpc_uri *grpc_uri_parse(grpc_exec_ctx *exec_ctx, const char *uri_text,
+                         int suppress_errors);
 
 /** return the part of a query string after the '=' in "?key=xxx&...", or NULL
  * if key is not present */
diff --git a/src/core/ext/lb_policy/grpclb/grpclb.c b/src/core/ext/lb_policy/grpclb/grpclb.c
index aea0fcc..d612591 100644
--- a/src/core/ext/lb_policy/grpclb/grpclb.c
+++ b/src/core/ext/lb_policy/grpclb/grpclb.c
@@ -861,7 +861,7 @@
   arg = grpc_channel_args_find(args->args, GRPC_ARG_SERVER_URI);
   GPR_ASSERT(arg != NULL);
   GPR_ASSERT(arg->type == GRPC_ARG_STRING);
-  grpc_uri *uri = grpc_uri_parse(arg->value.string, true);
+  grpc_uri *uri = grpc_uri_parse(exec_ctx, arg->value.string, true);
   GPR_ASSERT(uri->path[0] != '\0');
   glb_policy->server_name =
       gpr_strdup(uri->path[0] == '/' ? uri->path + 1 : uri->path);
diff --git a/src/core/ext/transport/chttp2/client/chttp2_connector.c b/src/core/ext/transport/chttp2/client/chttp2_connector.c
index fc5e17d..eae0145 100644
--- a/src/core/ext/transport/chttp2/client/chttp2_connector.c
+++ b/src/core/ext/transport/chttp2/client/chttp2_connector.c
@@ -226,7 +226,7 @@
                                      grpc_closure *notify) {
   chttp2_connector *c = (chttp2_connector *)con;
   grpc_resolved_address addr;
-  grpc_get_subchannel_address_arg(args->channel_args, &addr);
+  grpc_get_subchannel_address_arg(exec_ctx, args->channel_args, &addr);
   gpr_mu_lock(&c->mu);
   GPR_ASSERT(c->notify == NULL);
   c->notify = notify;
diff --git a/src/core/ext/transport/chttp2/client/insecure/channel_create.c b/src/core/ext/transport/chttp2/client/insecure/channel_create.c
index 286232f..067ac35 100644
--- a/src/core/ext/transport/chttp2/client/insecure/channel_create.c
+++ b/src/core/ext/transport/chttp2/client/insecure/channel_create.c
@@ -72,7 +72,8 @@
   grpc_arg arg;
   arg.type = GRPC_ARG_STRING;
   arg.key = GRPC_ARG_SERVER_URI;
-  arg.value.string = grpc_resolver_factory_add_default_prefix_if_needed(target);
+  arg.value.string =
+      grpc_resolver_factory_add_default_prefix_if_needed(exec_ctx, target);
   const char *to_remove[] = {GRPC_ARG_SERVER_URI};
   grpc_channel_args *new_args =
       grpc_channel_args_copy_and_add_and_remove(args, to_remove, 1, &arg, 1);
diff --git a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c
index 825db68..f0c241d 100644
--- a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c
+++ b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c
@@ -83,7 +83,7 @@
   const char *server_uri_str = server_uri_arg->value.string;
   GPR_ASSERT(server_uri_str != NULL);
   grpc_uri *server_uri =
-      grpc_uri_parse(server_uri_str, true /* supress errors */);
+      grpc_uri_parse(exec_ctx, server_uri_str, true /* supress errors */);
   GPR_ASSERT(server_uri != NULL);
   const char *server_uri_path;
   server_uri_path =
@@ -96,7 +96,7 @@
     const char *target_uri_str =
         grpc_get_subchannel_address_uri_arg(args->args);
     grpc_uri *target_uri =
-        grpc_uri_parse(target_uri_str, false /* suppress errors */);
+        grpc_uri_parse(exec_ctx, target_uri_str, false /* suppress errors */);
     GPR_ASSERT(target_uri != NULL);
     if (target_uri->path[0] != '\0') {  // "path" may be empty
       const grpc_slice key = grpc_slice_from_static_string(
@@ -181,7 +181,8 @@
   grpc_arg arg;
   arg.type = GRPC_ARG_STRING;
   arg.key = GRPC_ARG_SERVER_URI;
-  arg.value.string = grpc_resolver_factory_add_default_prefix_if_needed(target);
+  arg.value.string =
+      grpc_resolver_factory_add_default_prefix_if_needed(exec_ctx, target);
   const char *to_remove[] = {GRPC_ARG_SERVER_URI};
   grpc_channel_args *new_args =
       grpc_channel_args_copy_and_add_and_remove(args, to_remove, 1, &arg, 1);
diff --git a/src/core/lib/iomgr/sockaddr_utils.c b/src/core/lib/iomgr/sockaddr_utils.c
index ffa62cb..9d27326 100644
--- a/src/core/lib/iomgr/sockaddr_utils.c
+++ b/src/core/lib/iomgr/sockaddr_utils.c
@@ -162,6 +162,7 @@
   char ntop_buf[INET6_ADDRSTRLEN];
   const void *ip = NULL;
   int port;
+  uint32_t sin6_scope_id = 0;
   int ret;
 
   *out = NULL;
@@ -177,10 +178,19 @@
     const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6 *)addr;
     ip = &addr6->sin6_addr;
     port = ntohs(addr6->sin6_port);
+    sin6_scope_id = addr6->sin6_scope_id;
   }
   if (ip != NULL &&
       grpc_inet_ntop(addr->sa_family, ip, ntop_buf, sizeof(ntop_buf)) != NULL) {
-    ret = gpr_join_host_port(out, ntop_buf, port);
+    if (sin6_scope_id != 0) {
+      char *host_with_scope;
+      /* Enclose sin6_scope_id with the format defined in RFC 6784 section 2. */
+      gpr_asprintf(&host_with_scope, "%s%%25%" PRIu32, ntop_buf, sin6_scope_id);
+      ret = gpr_join_host_port(out, host_with_scope, port);
+      gpr_free(host_with_scope);
+    } else {
+      ret = gpr_join_host_port(out, ntop_buf, port);
+    }
   } else {
     ret = gpr_asprintf(out, "(sockaddr family=%d)", addr->sa_family);
   }
diff --git a/src/core/lib/iomgr/tcp_server_posix.c b/src/core/lib/iomgr/tcp_server_posix.c
index 36f878f..5f286a6 100644
--- a/src/core/lib/iomgr/tcp_server_posix.c
+++ b/src/core/lib/iomgr/tcp_server_posix.c
@@ -114,6 +114,8 @@
 
   /* is this server shutting down? */
   bool shutdown;
+  /* have listeners been shutdown? */
+  bool shutdown_listeners;
   /* use SO_REUSEPORT */
   bool so_reuseport;
   /* expand wildcard addresses to a list of all local addresses */
@@ -161,7 +163,7 @@
                                    grpc_tcp_server **server) {
   gpr_once_init(&check_init, init);
 
-  grpc_tcp_server *s = gpr_malloc(sizeof(grpc_tcp_server));
+  grpc_tcp_server *s = gpr_zalloc(sizeof(grpc_tcp_server));
   s->so_reuseport = has_so_reuseport;
   s->resource_quota = grpc_resource_quota_create(NULL);
   s->expand_wildcard_addrs = false;
@@ -422,7 +424,14 @@
           grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
           return;
         default:
-          gpr_log(GPR_ERROR, "Failed accept4: %s", strerror(errno));
+          gpr_mu_lock(&sp->server->mu);
+          if (!sp->server->shutdown_listeners) {
+            gpr_log(GPR_ERROR, "Failed accept4: %s", strerror(errno));
+          } else {
+            /* if we have shutdown listeners, accept4 could fail, and we
+               needn't notify users */
+          }
+          gpr_mu_unlock(&sp->server->mu);
           goto error;
       }
     }
@@ -438,11 +447,6 @@
 
     grpc_fd *fdobj = grpc_fd_create(fd, name);
 
-    if (read_notifier_pollset == NULL) {
-      gpr_log(GPR_ERROR, "Read notifier pollset is not set on the fd");
-      goto error;
-    }
-
     grpc_pollset_add_fd(exec_ctx, read_notifier_pollset, fdobj);
 
     // Create acceptor.
@@ -941,6 +945,7 @@
 void grpc_tcp_server_shutdown_listeners(grpc_exec_ctx *exec_ctx,
                                         grpc_tcp_server *s) {
   gpr_mu_lock(&s->mu);
+  s->shutdown_listeners = true;
   /* shutdown all fd's */
   if (s->active_ports) {
     grpc_tcp_listener *sp;
diff --git a/src/core/lib/support/sync.c b/src/core/lib/support/sync.c
index 44b83f8..e4a7fce 100644
--- a/src/core/lib/support/sync.c
+++ b/src/core/lib/support/sync.c
@@ -37,6 +37,8 @@
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
 
+#include <assert.h>
+
 /* Number of mutexes to allocate for events, to avoid lock contention.
    Should be a prime. */
 enum { event_sync_partitions = 31 };
@@ -99,8 +101,12 @@
 void gpr_ref(gpr_refcount *r) { gpr_atm_no_barrier_fetch_add(&r->count, 1); }
 
 void gpr_ref_non_zero(gpr_refcount *r) {
+#ifndef NDEBUG
   gpr_atm prior = gpr_atm_no_barrier_fetch_add(&r->count, 1);
-  GPR_ASSERT(prior > 0);
+  assert(prior > 0);
+#else
+  gpr_ref(r);
+#endif
 }
 
 void gpr_refn(gpr_refcount *r, int n) {
diff --git a/src/core/lib/surface/call.c b/src/core/lib/surface/call.c
index cc57654..c2547c5 100644
--- a/src/core/lib/surface/call.c
+++ b/src/core/lib/surface/call.c
@@ -161,6 +161,7 @@
   bool receiving_message;
   bool requested_final_op;
   bool received_final_op;
+  bool sent_any_op;
 
   /* have we received initial metadata */
   bool has_initial_md_been_received;
@@ -488,7 +489,7 @@
   gpr_mu_lock(&c->mu);
   GPR_ASSERT(!c->destroy_called);
   c->destroy_called = 1;
-  cancel = !c->received_final_op;
+  cancel = c->sent_any_op && !c->received_final_op;
   gpr_mu_unlock(&c->mu);
   if (cancel) {
     cancel_with_error(&exec_ctx, c, STATUS_FROM_API_OVERRIDE,
@@ -1678,6 +1679,7 @@
   grpc_closure_init(&bctl->finish_batch, finish_batch, bctl,
                     grpc_schedule_on_exec_ctx);
   stream_op->on_complete = &bctl->finish_batch;
+  call->sent_any_op = true;
   gpr_mu_unlock(&call->mu);
 
   execute_op(exec_ctx, call, stream_op);
diff --git a/src/core/lib/transport/transport.c b/src/core/lib/transport/transport.c
index 004e748..165950e 100644
--- a/src/core/lib/transport/transport.c
+++ b/src/core/lib/transport/transport.c
@@ -84,6 +84,39 @@
   }
 }
 
+#define STREAM_REF_FROM_SLICE_REF(p)         \
+  ((grpc_stream_refcount *)(((uint8_t *)p) - \
+                            offsetof(grpc_stream_refcount, slice_refcount)))
+
+static void slice_stream_ref(void *p) {
+#ifdef GRPC_STREAM_REFCOUNT_DEBUG
+  grpc_stream_ref(STREAM_REF_FROM_SLICE_REF(p), "slice");
+#else
+  grpc_stream_ref(STREAM_REF_FROM_SLICE_REF(p));
+#endif
+}
+
+static void slice_stream_unref(grpc_exec_ctx *exec_ctx, void *p) {
+#ifdef GRPC_STREAM_REFCOUNT_DEBUG
+  grpc_stream_unref(exec_ctx, STREAM_REF_FROM_SLICE_REF(p), "slice");
+#else
+  grpc_stream_unref(exec_ctx, STREAM_REF_FROM_SLICE_REF(p));
+#endif
+}
+
+grpc_slice grpc_slice_from_stream_owned_buffer(grpc_stream_refcount *refcount,
+                                               void *buffer, size_t length) {
+  slice_stream_ref(&refcount->slice_refcount);
+  return (grpc_slice){.refcount = &refcount->slice_refcount,
+                      .data.refcounted = {.bytes = buffer, .length = length}};
+}
+
+static const grpc_slice_refcount_vtable stream_ref_slice_vtable = {
+    .ref = slice_stream_ref,
+    .unref = slice_stream_unref,
+    .eq = grpc_slice_default_eq_impl,
+    .hash = grpc_slice_default_hash_impl};
+
 #ifdef GRPC_STREAM_REFCOUNT_DEBUG
 void grpc_stream_ref_init(grpc_stream_refcount *refcount, int initial_refs,
                           grpc_iomgr_cb_func cb, void *cb_arg,
@@ -95,6 +128,8 @@
 #endif
   gpr_ref_init(&refcount->refs, initial_refs);
   grpc_closure_init(&refcount->destroy, cb, cb_arg, grpc_schedule_on_exec_ctx);
+  refcount->slice_refcount.vtable = &stream_ref_slice_vtable;
+  refcount->slice_refcount.sub_refcount = &refcount->slice_refcount;
 }
 
 static void move64(uint64_t *from, uint64_t *to) {
diff --git a/src/core/lib/transport/transport.h b/src/core/lib/transport/transport.h
index bb23c02..cc1c277 100644
--- a/src/core/lib/transport/transport.h
+++ b/src/core/lib/transport/transport.h
@@ -64,6 +64,7 @@
 #ifdef GRPC_STREAM_REFCOUNT_DEBUG
   const char *object_type;
 #endif
+  grpc_slice_refcount slice_refcount;
 } grpc_stream_refcount;
 
 #ifdef GRPC_STREAM_REFCOUNT_DEBUG
@@ -84,6 +85,11 @@
   grpc_stream_ref_init(rc, ir, cb, cb_arg)
 #endif
 
+/* Wrap a buffer that is owned by some stream object into a slice that shares
+   the same refcount */
+grpc_slice grpc_slice_from_stream_owned_buffer(grpc_stream_refcount *refcount,
+                                               void *buffer, size_t length);
+
 typedef struct {
   uint64_t framing_bytes;
   uint64_t data_bytes;
diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.csproj b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
index db55ed5..9ef9852 100644
--- a/src/csharp/Grpc.Auth/Grpc.Auth.csproj
+++ b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
@@ -34,32 +34,26 @@
     <Reference Include="System.Net" />
     <Reference Include="System.Net.Http" />
     <Reference Include="System.Net.Http.WebRequest" />
-    <Reference Include="BouncyCastle.Crypto">
-      <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
-    </Reference>
-    <Reference Include="Newtonsoft.Json">
-      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
-    </Reference>
-    <Reference Include="log4net">
-      <HintPath>..\packages\log4net.2.0.3\lib\net40-full\log4net.dll</HintPath>
-    </Reference>
-    <Reference Include="Google.Apis.Core">
-      <HintPath>..\packages\Google.Apis.Core.1.16.0\lib\net45\Google.Apis.Core.dll</HintPath>
-    </Reference>
     <Reference Include="Zlib.Portable">
       <HintPath>..\packages\Zlib.Portable.Signed.1.11.0\lib\portable-net4+sl5+wp8+win8+wpa81+MonoTouch+MonoAndroid\Zlib.Portable.dll</HintPath>
     </Reference>
+    <Reference Include="Google.Apis.Core">
+      <HintPath>..\packages\Google.Apis.Core.1.21.0\lib\net45\Google.Apis.Core.dll</HintPath>
+    </Reference>
     <Reference Include="Google.Apis">
-      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.1.21.0\lib\net45\Google.Apis.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.PlatformServices">
-      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.PlatformServices.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.1.21.0\lib\net45\Google.Apis.PlatformServices.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth">
-      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.21.0\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth.PlatformServices">
-      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.21.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+    </Reference>
+    <Reference Include="Newtonsoft.Json">
+      <HintPath>..\packages\Newtonsoft.Json.9.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/src/csharp/Grpc.Auth/packages.config b/src/csharp/Grpc.Auth/packages.config
index 11c6375..aecc65e 100644
--- a/src/csharp/Grpc.Auth/packages.config
+++ b/src/csharp/Grpc.Auth/packages.config
@@ -1,10 +1,8 @@
 ﻿<?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Google.Apis" version="1.16.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.16.0" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.16.0" targetFramework="net45" />
-  <package id="log4net" version="2.0.3" targetFramework="net45" />
-  <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
+  <package id="Google.Apis" version="1.21.0" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.21.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.21.0" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net45" />
   <package id="Zlib.Portable.Signed" version="1.11.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 3805f47..170149a 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -22,7 +22,7 @@
   },
   "dependencies": {
     "Grpc.Core": "1.2.0-dev",
-    "Google.Apis.Auth": "1.16.0"
+    "Google.Apis.Auth": "1.21.0"
   },
   "frameworks": {
     "net45": { },
diff --git a/src/csharp/Grpc.Core.Tests/AuthContextTest.cs b/src/csharp/Grpc.Core.Tests/AuthContextTest.cs
new file mode 100644
index 0000000..f5fa469
--- /dev/null
+++ b/src/csharp/Grpc.Core.Tests/AuthContextTest.cs
@@ -0,0 +1,86 @@
+#region Copyright notice and license
+
+// 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.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using NUnit.Framework;
+using Grpc.Core;
+using System.Linq;
+
+namespace Grpc.Core.Tests
+{
+    public class AuthContextTest
+    {
+        [Test]
+        public void EmptyContext()
+        {
+            var context = new AuthContext(null, new Dictionary<string, List<AuthProperty>>());
+            Assert.IsFalse(context.IsPeerAuthenticated);
+            Assert.IsNull(context.PeerIdentityPropertyName);
+            Assert.AreEqual(0, context.PeerIdentity.Count());
+            Assert.AreEqual(0, context.Properties.Count());
+            Assert.AreEqual(0, context.FindPropertiesByName("nonexistent").Count());
+        }
+
+        [Test]
+        public void AuthenticatedContext()
+        {
+            var property1 = AuthProperty.Create("abc", new byte[] { 68, 69, 70 });
+            var context = new AuthContext("some_identity", new Dictionary<string, List<AuthProperty>>
+            {
+                {"some_identity", new List<AuthProperty> {property1}}
+            });
+            Assert.IsTrue(context.IsPeerAuthenticated);
+            Assert.AreEqual("some_identity", context.PeerIdentityPropertyName);
+            Assert.AreEqual(1, context.PeerIdentity.Count());
+        }
+
+        [Test]
+        public void FindPropertiesByName()
+        {
+            var property1 = AuthProperty.Create("abc", new byte[] {68, 69, 70});
+            var property2 = AuthProperty.Create("abc", new byte[] {71, 72, 73 });
+            var property3 = AuthProperty.Create("abc", new byte[] {});
+            var context = new AuthContext(null, new Dictionary<string, List<AuthProperty>>
+            {
+                {"existent", new List<AuthProperty> {property1, property2}},
+                {"foobar", new List<AuthProperty> {property3}},
+            });
+            Assert.AreEqual(3, context.Properties.Count());
+            Assert.AreEqual(0, context.FindPropertiesByName("nonexistent").Count());
+
+            var existentProperties = new List<AuthProperty>(context.FindPropertiesByName("existent"));
+            Assert.AreEqual(2, existentProperties.Count);
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core.Tests/AuthPropertyTest.cs b/src/csharp/Grpc.Core.Tests/AuthPropertyTest.cs
new file mode 100644
index 0000000..745191b
--- /dev/null
+++ b/src/csharp/Grpc.Core.Tests/AuthPropertyTest.cs
@@ -0,0 +1,82 @@
+#region Copyright notice and license
+
+// 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.
+
+#endregion
+
+using System;
+using NUnit.Framework;
+
+namespace Grpc.Core.Tests
+{
+    public class AuthPropertyTest
+    {
+        [Test]
+        public void Create_NameIsNotNull()
+        {
+            Assert.Throws(typeof(ArgumentNullException), () => AuthProperty.Create(null, new byte[0]));
+            Assert.Throws(typeof(ArgumentNullException), () => AuthProperty.CreateUnsafe(null, new byte[0]));
+        }
+
+        [Test]
+        public void Create_ValueIsNotNull()
+        {
+            Assert.Throws(typeof(ArgumentNullException), () => AuthProperty.Create("abc", null));
+            Assert.Throws(typeof(ArgumentNullException), () => AuthProperty.CreateUnsafe("abc", null));
+        }
+
+        [Test]
+        public void Create()
+        {
+            var valueBytes = new byte[] { 68, 69, 70 };
+            var authProperty = AuthProperty.Create("abc", valueBytes);
+
+            Assert.AreEqual("abc", authProperty.Name);
+            Assert.AreNotSame(valueBytes, authProperty.ValueBytesUnsafe);
+            CollectionAssert.AreEqual(valueBytes, authProperty.ValueBytes);
+            CollectionAssert.AreEqual(valueBytes, authProperty.ValueBytesUnsafe);
+            Assert.AreEqual("DEF", authProperty.Value);
+        }
+
+        [Test]
+        public void CreateUnsafe()
+        {
+            var valueBytes = new byte[] { 68, 69, 70 };
+            var authProperty = AuthProperty.CreateUnsafe("abc", valueBytes);
+
+            Assert.AreEqual("abc", authProperty.Name);
+            Assert.AreSame(valueBytes, authProperty.ValueBytesUnsafe);
+            Assert.AreNotSame(valueBytes, authProperty.ValueBytes);
+            CollectionAssert.AreEqual(valueBytes, authProperty.ValueBytes);
+            CollectionAssert.AreEqual(valueBytes, authProperty.ValueBytesUnsafe);
+            Assert.AreEqual("DEF", authProperty.Value);
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core.Tests/ClientServerTest.cs b/src/csharp/Grpc.Core.Tests/ClientServerTest.cs
index 6bf9756..3a99107 100644
--- a/src/csharp/Grpc.Core.Tests/ClientServerTest.cs
+++ b/src/csharp/Grpc.Core.Tests/ClientServerTest.cs
@@ -376,6 +376,18 @@
         }
 
         [Test]
+        public void ServerCallContext_AuthContextNotPopulated()
+        {
+            helper.UnaryHandler = new UnaryServerMethod<string, string>(async (request, context) =>
+            {
+                Assert.IsFalse(context.AuthContext.IsPeerAuthenticated);
+                Assert.AreEqual(0, context.AuthContext.Properties.Count());
+                return "PASS";
+            });
+            Assert.AreEqual("PASS", Calls.BlockingUnaryCall(helper.CreateUnaryCall(), "abc"));
+        }
+
+        [Test]
         public async Task Channel_WaitForStateChangedAsync()
         {
             helper.UnaryHandler = new UnaryServerMethod<string, string>(async (request, context) =>
diff --git a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
index 646effe..a1a2e4e 100644
--- a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
+++ b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
@@ -27,18 +27,18 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
-    <Reference Include="nunit.framework">
-      <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
-    </Reference>
-    <Reference Include="nunitlite">
-      <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
-    </Reference>
-    <Reference Include="Newtonsoft.Json">
-      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
-    </Reference>
     <Reference Include="System.Interactive.Async">
       <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
+    <Reference Include="Newtonsoft.Json">
+      <HintPath>..\packages\Newtonsoft.Json.9.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+    </Reference>
+    <Reference Include="nunit.framework">
+      <HintPath>..\packages\NUnit.3.6.0\lib\net45\nunit.framework.dll</HintPath>
+    </Reference>
+    <Reference Include="nunitlite">
+      <HintPath>..\packages\NUnitLite.3.6.0\lib\net45\nunitlite.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
@@ -64,7 +64,6 @@
     <Compile Include="ChannelOptionsTest.cs" />
     <Compile Include="Internal\TimespecTest.cs" />
     <Compile Include="TimeoutsTest.cs" />
-    <Compile Include="NUnitVersionTest.cs" />
     <Compile Include="ChannelTest.cs" />
     <Compile Include="MockServiceHelper.cs" />
     <Compile Include="ResponseHeadersTest.cs" />
@@ -81,6 +80,8 @@
     <Compile Include="ShutdownHookPendingCallTest.cs" />
     <Compile Include="ShutdownHookClientTest.cs" />
     <Compile Include="AppDomainUnloadTest.cs" />
+    <Compile Include="AuthContextTest.cs" />
+    <Compile Include="AuthPropertyTest.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>
diff --git a/src/csharp/Grpc.Core.Tests/NUnitVersionTest.cs b/src/csharp/Grpc.Core.Tests/NUnitVersionTest.cs
deleted file mode 100644
index 1a9e441..0000000
--- a/src/csharp/Grpc.Core.Tests/NUnitVersionTest.cs
+++ /dev/null
@@ -1,77 +0,0 @@
-#region Copyright notice and license
-
-// 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.
-
-#endregion
-
-using System;
-using System.Threading;
-using System.Threading.Tasks;
-using Grpc.Core;
-using Grpc.Core.Internal;
-using Grpc.Core.Utils;
-using NUnit.Framework;
-
-namespace Grpc.Core.Tests
-{
-    /// <summary>
-    /// Tests if the version of nunit-console used is sufficient to run async tests.
-    /// </summary>
-    public class NUnitVersionTest
-    {
-        private int testRunCount = 0;
-
-        [TestFixtureTearDown]
-        public void Cleanup()
-        {
-            if (testRunCount != 2)
-            {
-                Console.Error.WriteLine("You are using and old version of NUnit that doesn't support async tests and skips them instead. " +
-                "This test has failed to indicate that.");
-                Console.Error.Flush();
-                throw new Exception("NUnitVersionTest has failed.");
-            }
-        }
-
-        [Test]
-        public void NUnitVersionTest1()
-        {
-            testRunCount++;
-        }
-
-        // Old version of NUnit will skip this test
-        [Test]
-        public async Task NUnitVersionTest2()
-        {
-            testRunCount++;
-            await Task.Delay(10);
-        }
-    }
-}
diff --git a/src/csharp/Grpc.Core.Tests/packages.config b/src/csharp/Grpc.Core.Tests/packages.config
index 4750735..994a278 100644
--- a/src/csharp/Grpc.Core.Tests/packages.config
+++ b/src/csharp/Grpc.Core.Tests/packages.config
@@ -1,9 +1,8 @@
 ﻿<?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
-  <package id="NUnit" version="3.2.0" targetFramework="net45" />
-  <package id="NUnit.ConsoleRunner" version="3.2.0" />
-  <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net45" />
+  <package id="NUnit" version="3.6.0" targetFramework="net45" />
+  <package id="NUnitLite" version="3.6.0" targetFramework="net45" />
   <package id="OpenCover" version="4.6.519" />
   <package id="ReportGenerator" version="2.4.4.0" />
   <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
diff --git a/src/csharp/Grpc.Core.Tests/project.json b/src/csharp/Grpc.Core.Tests/project.json
index 045207a..14e5ed5 100644
--- a/src/csharp/Grpc.Core.Tests/project.json
+++ b/src/csharp/Grpc.Core.Tests/project.json
@@ -45,10 +45,10 @@
     "Grpc.Core": {
       "target": "project"
     },
-    "Newtonsoft.Json": "8.0.3",
-    "NUnit": "3.2.0",
-    "NUnitLite": "3.2.0-*",
-    "NUnit.ConsoleRunner": "3.2.0",
+    "Newtonsoft.Json": "9.0.1",
+    "NUnit": "3.6.0",
+    "NUnitLite": "3.6.0",
+    "NUnit.ConsoleRunner": "3.6.0",
     "OpenCover": "4.6.519",
     "ReportGenerator": "2.4.4.0"
   },
diff --git a/src/csharp/Grpc.Core/AuthContext.cs b/src/csharp/Grpc.Core/AuthContext.cs
new file mode 100644
index 0000000..340b220
--- /dev/null
+++ b/src/csharp/Grpc.Core/AuthContext.cs
@@ -0,0 +1,128 @@
+#region Copyright notice and license
+
+// 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.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+
+namespace Grpc.Core
+{
+    /// <summary>
+    /// Authentication context for a call.
+    /// AuthContext is the only reliable source of truth when it comes to authenticating calls.
+    /// Using any other call/context properties for authentication purposes is wrong and inherently unsafe.
+    /// Note: experimental API that can change or be removed without any prior notice.
+    /// </summary>
+    public class AuthContext
+    {
+        string peerIdentityPropertyName;
+        Dictionary<string, List<AuthProperty>> properties;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="T:Grpc.Core.AuthContext"/> class.
+        /// </summary>
+        /// <param name="peerIdentityPropertyName">Peer identity property name.</param>
+        /// <param name="properties">Multimap of auth properties by name.</param>
+        internal AuthContext(string peerIdentityPropertyName, Dictionary<string, List<AuthProperty>> properties)
+        {
+            this.peerIdentityPropertyName = peerIdentityPropertyName;
+            this.properties = GrpcPreconditions.CheckNotNull(properties);
+        }
+
+        /// <summary>
+        /// Returns <c>true</c> if the peer is authenticated.
+        /// </summary>
+        public bool IsPeerAuthenticated
+        {
+            get
+            {
+                return peerIdentityPropertyName != null;
+            }
+        }
+
+        /// <summary>
+        /// Gets the name of the property that indicates the peer identity. Returns <c>null</c>
+        /// if the peer is not authenticated.
+        /// </summary>
+        public string PeerIdentityPropertyName
+        {
+            get
+            {
+                return peerIdentityPropertyName;
+            }
+        }
+
+        /// <summary>
+        /// Gets properties that represent the peer identity (there can be more than one). Returns an empty collection
+        /// if the peer is not authenticated.
+        /// </summary>
+        public IEnumerable<AuthProperty> PeerIdentity
+        {
+            get
+            {
+                if (peerIdentityPropertyName == null)
+                {
+                    return Enumerable.Empty<AuthProperty>();
+                }
+                return properties[peerIdentityPropertyName];
+            }
+        }
+
+        /// <summary>
+        /// Gets the auth properties of this context.
+        /// </summary>
+        public IEnumerable<AuthProperty> Properties
+        {
+            get
+            {
+                return properties.Values.SelectMany(v => v);
+            }
+        }
+
+        /// <summary>
+        /// Returns the auth properties with given name (there can be more than one).
+        /// If no properties of given name exist, an empty collection will be returned.
+        /// </summary>
+        public IEnumerable<AuthProperty> FindPropertiesByName(string propertyName)
+        {
+            List<AuthProperty> result;
+            if (!properties.TryGetValue(propertyName, out result))
+            {
+                return Enumerable.Empty<AuthProperty>();
+            }
+            return result;
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core/AuthProperty.cs b/src/csharp/Grpc.Core/AuthProperty.cs
new file mode 100644
index 0000000..c7a132b
--- /dev/null
+++ b/src/csharp/Grpc.Core/AuthProperty.cs
@@ -0,0 +1,126 @@
+#region Copyright notice and license
+
+// 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.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+
+namespace Grpc.Core
+{
+    /// <summary>
+    /// A property of an <see cref="AuthContext"/>.
+    /// Note: experimental API that can change or be removed without any prior notice.
+    /// </summary>
+    public class AuthProperty
+    {
+        string name;
+        byte[] valueBytes;
+        Lazy<string> value;
+
+        private AuthProperty(string name, byte[] valueBytes)
+        {
+            this.name = GrpcPreconditions.CheckNotNull(name);
+            this.valueBytes = GrpcPreconditions.CheckNotNull(valueBytes);
+            this.value = new Lazy<string>(() => MarshalUtils.GetStringUTF8(this.valueBytes));
+        }
+
+        /// <summary>
+        /// Gets the name of the property.
+        /// </summary>
+        public string Name
+        {
+            get
+            {
+                return name;
+            }
+        }
+
+        /// <summary>
+        /// Gets the string value of the property.
+        /// </summary>
+        public string Value
+        {
+            get
+            {
+                return value.Value;
+            }
+        }
+
+        /// <summary>
+        /// Gets the binary value of the property.
+        /// </summary>
+        public byte[] ValueBytes
+        {
+            get
+            {
+                var valueCopy = new byte[valueBytes.Length];
+                Buffer.BlockCopy(valueBytes, 0, valueCopy, 0, valueBytes.Length);
+                return valueCopy;
+            }
+        }
+
+        /// <summary>
+        /// Creates an instance of <c>AuthProperty</c>.
+        /// </summary>
+        /// <param name="name">the name</param>
+        /// <param name="valueBytes">the binary value of the property</param>
+        public static AuthProperty Create(string name, byte[] valueBytes)
+        {
+            GrpcPreconditions.CheckNotNull(valueBytes);
+            var valueCopy = new byte[valueBytes.Length];
+            Buffer.BlockCopy(valueBytes, 0, valueCopy, 0, valueBytes.Length);
+            return new AuthProperty(name, valueCopy);
+        }
+
+        /// <summary>
+        /// Gets the binary value of the property (without making a defensive copy).
+        /// </summary>
+        internal byte[] ValueBytesUnsafe
+        {
+            get
+            {
+                return valueBytes;
+            }
+        }
+
+        /// <summary>
+        /// Creates and instance of <c>AuthProperty</c> without making a defensive copy of <c>valueBytes</c>.
+        /// </summary>
+        internal static AuthProperty CreateUnsafe(string name, byte[] valueBytes)
+        {
+            return new AuthProperty(name, valueBytes);
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core/Grpc.Core.csproj b/src/csharp/Grpc.Core/Grpc.Core.csproj
index 23e1ddc..d6d8dfa 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.csproj
+++ b/src/csharp/Grpc.Core/Grpc.Core.csproj
@@ -131,6 +131,10 @@
     <Compile Include="Internal\RequestCallContextSafeHandle.cs" />
     <Compile Include="Utils\TaskUtils.cs" />
     <Compile Include="Internal\CallFlags.cs" />
+    <Compile Include="AuthContext.cs" />
+    <Compile Include="Internal\AuthContextSafeHandle.cs" />
+    <Compile Include="Internal\MarshalUtils.cs" />
+    <Compile Include="AuthProperty.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="Grpc.Core.project.json" />
diff --git a/src/csharp/Grpc.Core/Internal/AuthContextSafeHandle.cs b/src/csharp/Grpc.Core/Internal/AuthContextSafeHandle.cs
new file mode 100644
index 0000000..59e33a0
--- /dev/null
+++ b/src/csharp/Grpc.Core/Internal/AuthContextSafeHandle.cs
@@ -0,0 +1,119 @@
+#region Copyright notice and license
+
+// 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.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using System.Text;
+using Grpc.Core;
+using Grpc.Core.Utils;
+
+namespace Grpc.Core.Internal
+{
+    /// <summary>
+    /// grpc_auth_context
+    /// </summary>
+    internal class AuthContextSafeHandle : SafeHandleZeroIsInvalid
+    {
+        static readonly NativeMethods Native = NativeMethods.Get();
+
+        private AuthContextSafeHandle()
+        {
+        }
+
+        /// <summary>
+        /// Copies contents of the native auth context into a new <c>AuthContext</c> instance.
+        /// </summary>
+        public AuthContext ToAuthContext()
+        {
+            if (IsInvalid)
+            {
+                return new AuthContext(null, new Dictionary<string, List<AuthProperty>>());
+            }
+
+            var peerIdentityPropertyName = Marshal.PtrToStringAnsi(Native.grpcsharp_auth_context_peer_identity_property_name(this));
+
+            var propertiesDict = new Dictionary<string, List<AuthProperty>>();
+
+            var it = Native.grpcsharp_auth_context_property_iterator(this);
+            IntPtr authPropertyPtr = IntPtr.Zero;
+            while ((authPropertyPtr = Native.grpcsharp_auth_property_iterator_next(ref it)) != IntPtr.Zero)
+            {
+                var authProperty = PtrToAuthProperty(authPropertyPtr);
+
+                if (!propertiesDict.ContainsKey(authProperty.Name))
+                {
+                    propertiesDict[authProperty.Name] = new List<AuthProperty>();
+                }
+                propertiesDict[authProperty.Name].Add(authProperty);
+            }
+
+            return new AuthContext(peerIdentityPropertyName, propertiesDict);
+        }
+
+        protected override bool ReleaseHandle()
+        {
+            Native.grpcsharp_auth_context_release(handle);
+            return true;
+        }
+
+        private AuthProperty PtrToAuthProperty(IntPtr authPropertyPtr)
+        {
+            var nativeAuthProperty = (NativeAuthProperty) Marshal.PtrToStructure(authPropertyPtr, typeof(NativeAuthProperty));
+            var name = Marshal.PtrToStringAnsi(nativeAuthProperty.Name);
+            var valueBytes = new byte[(int) nativeAuthProperty.ValueLength];
+            Marshal.Copy(nativeAuthProperty.Value, valueBytes, 0, (int)nativeAuthProperty.ValueLength);
+            return AuthProperty.CreateUnsafe(name, valueBytes);
+        }
+
+        /// <summary>
+        /// grpc_auth_property
+        /// </summary>
+        internal struct NativeAuthProperty
+        {
+            public IntPtr Name;
+            public IntPtr Value;
+            public UIntPtr ValueLength;
+        }
+
+        /// <summary>
+        /// grpc_auth_property_iterator
+        /// </summary>
+        internal struct NativeAuthPropertyIterator
+        {
+            public IntPtr AuthContext;
+            public UIntPtr Index;
+            public IntPtr Name;
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs b/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs
index efae149..6dee6d8 100644
--- a/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs
@@ -43,7 +43,6 @@
     /// </summary>
     internal class BatchContextSafeHandle : SafeHandleZeroIsInvalid
     {
-        static readonly Encoding EncodingUTF8 = System.Text.Encoding.UTF8;
         static readonly NativeMethods Native = NativeMethods.Get();
 
         private BatchContextSafeHandle()
@@ -75,7 +74,7 @@
         {
             UIntPtr detailsLength;
             IntPtr detailsPtr = Native.grpcsharp_batch_context_recv_status_on_client_details(this, out detailsLength);
-            string details = PtrToStringUtf8(detailsPtr, (int) detailsLength.ToUInt32());
+            string details = MarshalUtils.PtrToStringUTF8(detailsPtr, (int) detailsLength.ToUInt32());
             var status = new Status(Native.grpcsharp_batch_context_recv_status_on_client_status(this), details);
 
             IntPtr metadataArrayPtr = Native.grpcsharp_batch_context_recv_status_on_client_trailing_metadata(this);
@@ -108,12 +107,5 @@
             Native.grpcsharp_batch_context_destroy(handle);
             return true;
         }
-
-        string PtrToStringUtf8(IntPtr ptr, int len)
-        {
-            var bytes = new byte[len];
-            Marshal.Copy(ptr, bytes, 0, len);
-            return EncodingUTF8.GetString(bytes);
-        }
     }
 }
diff --git a/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs b/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
index 710ca48..3c368fb 100644
--- a/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
@@ -45,7 +45,6 @@
     internal class CallSafeHandle : SafeHandleZeroIsInvalid, INativeCall
     {
         public static readonly CallSafeHandle NullInstance = new CallSafeHandle();
-        static readonly Encoding EncodingUTF8 = System.Text.Encoding.UTF8;
         static readonly NativeMethods Native = NativeMethods.Get();
 
         const uint GRPC_WRITE_BUFFER_HINT = 1;
@@ -140,7 +139,7 @@
                 var ctx = BatchContextSafeHandle.Create();
                 var optionalPayloadLength = optionalPayload != null ? new UIntPtr((ulong)optionalPayload.Length) : UIntPtr.Zero;
                 completionQueue.CompletionRegistry.RegisterBatchCompletion(ctx, (success, context) => callback(success));
-                var statusDetailBytes = EncodingUTF8.GetBytes(status.Detail);
+                var statusDetailBytes = MarshalUtils.GetBytesUTF8(status.Detail);
                 Native.grpcsharp_call_send_status_from_server(this, ctx, status.StatusCode, statusDetailBytes, new UIntPtr((ulong)statusDetailBytes.Length), metadataArray, sendEmptyInitialMetadata,
                     optionalPayload, optionalPayloadLength, writeFlags).CheckOk();
             }
@@ -204,6 +203,11 @@
             }
         }
 
+        public AuthContextSafeHandle GetAuthContext()
+        {
+            return Native.grpcsharp_call_auth_context(this);
+        }
+
         protected override bool ReleaseHandle()
         {
             Native.grpcsharp_call_destroy(handle);
diff --git a/src/csharp/Grpc.Core/Internal/MarshalUtils.cs b/src/csharp/Grpc.Core/Internal/MarshalUtils.cs
new file mode 100644
index 0000000..897e2f7
--- /dev/null
+++ b/src/csharp/Grpc.Core/Internal/MarshalUtils.cs
@@ -0,0 +1,90 @@
+#region Copyright notice and license
+
+// 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.
+
+#endregion
+
+using System;
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace Grpc.Core.Internal
+{
+    /// <summary>
+    /// Useful methods for native/managed marshalling.
+    /// </summary>
+    internal static class MarshalUtils
+    {
+        static readonly Encoding EncodingUTF8 = System.Text.Encoding.UTF8;
+        static readonly Encoding EncodingASCII = System.Text.Encoding.ASCII;
+
+        /// <summary>
+        /// Converts <c>IntPtr</c> pointing to a UTF-8 encoded byte array to <c>string</c>.
+        /// </summary>
+        public static string PtrToStringUTF8(IntPtr ptr, int len)
+        {
+            var bytes = new byte[len];
+            Marshal.Copy(ptr, bytes, 0, len);
+            return EncodingUTF8.GetString(bytes);
+        }
+
+        /// <summary>
+        /// Returns byte array containing UTF-8 encoding of given string.
+        /// </summary>
+        public static byte[] GetBytesUTF8(string str)
+        {
+            return EncodingUTF8.GetBytes(str);
+        }
+
+        /// <summary>
+        /// Get string from a UTF8 encoded byte array.
+        /// </summary>
+        public static string GetStringUTF8(byte[] bytes)
+        {
+            return EncodingUTF8.GetString(bytes);
+        }
+
+        /// <summary>
+        /// Returns byte array containing ASCII encoding of given string.
+        /// </summary>
+        public static byte[] GetBytesASCII(string str)
+        {
+            return EncodingASCII.GetBytes(str);
+        }
+
+        /// <summary>
+        /// Get string from an ASCII encoded byte array.
+        /// </summary>
+        public static string GetStringASCII(byte[] bytes)
+        {
+            return EncodingASCII.GetString(bytes);
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core/Internal/NativeMethods.cs b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
index aff9550..dd65f05 100644
--- a/src/csharp/Grpc.Core/Internal/NativeMethods.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
@@ -148,6 +148,12 @@
         public readonly Delegates.grpcsharp_server_shutdown_and_notify_callback_delegate grpcsharp_server_shutdown_and_notify_callback;
         public readonly Delegates.grpcsharp_server_destroy_delegate grpcsharp_server_destroy;
 
+        public readonly Delegates.grpcsharp_call_auth_context_delegate grpcsharp_call_auth_context;
+        public readonly Delegates.grpcsharp_auth_context_peer_identity_property_name_delegate grpcsharp_auth_context_peer_identity_property_name;
+        public readonly Delegates.grpcsharp_auth_context_property_iterator_delegate grpcsharp_auth_context_property_iterator;
+        public readonly Delegates.grpcsharp_auth_property_iterator_next_delegate grpcsharp_auth_property_iterator_next;
+        public readonly Delegates.grpcsharp_auth_context_release_delegate grpcsharp_auth_context_release;
+
         public readonly Delegates.gprsharp_now_delegate gprsharp_now;
         public readonly Delegates.gprsharp_inf_future_delegate gprsharp_inf_future;
         public readonly Delegates.gprsharp_inf_past_delegate gprsharp_inf_past;
@@ -256,6 +262,12 @@
             this.grpcsharp_server_shutdown_and_notify_callback = GetMethodDelegate<Delegates.grpcsharp_server_shutdown_and_notify_callback_delegate>(library);
             this.grpcsharp_server_destroy = GetMethodDelegate<Delegates.grpcsharp_server_destroy_delegate>(library);
 
+            this.grpcsharp_call_auth_context = GetMethodDelegate<Delegates.grpcsharp_call_auth_context_delegate>(library);
+            this.grpcsharp_auth_context_peer_identity_property_name = GetMethodDelegate<Delegates.grpcsharp_auth_context_peer_identity_property_name_delegate>(library);
+            this.grpcsharp_auth_context_property_iterator = GetMethodDelegate<Delegates.grpcsharp_auth_context_property_iterator_delegate>(library);
+            this.grpcsharp_auth_property_iterator_next = GetMethodDelegate<Delegates.grpcsharp_auth_property_iterator_next_delegate>(library);
+            this.grpcsharp_auth_context_release = GetMethodDelegate<Delegates.grpcsharp_auth_context_release_delegate>(library);
+
             this.gprsharp_now = GetMethodDelegate<Delegates.gprsharp_now_delegate>(library);
             this.gprsharp_inf_future = GetMethodDelegate<Delegates.gprsharp_inf_future_delegate>(library);
             this.gprsharp_inf_past = GetMethodDelegate<Delegates.gprsharp_inf_past_delegate>(library);
@@ -404,6 +416,12 @@
             public delegate void grpcsharp_server_shutdown_and_notify_callback_delegate(ServerSafeHandle server, CompletionQueueSafeHandle cq, BatchContextSafeHandle ctx);
             public delegate void grpcsharp_server_destroy_delegate(IntPtr server);
 
+            public delegate AuthContextSafeHandle grpcsharp_call_auth_context_delegate(CallSafeHandle call);
+            public delegate IntPtr grpcsharp_auth_context_peer_identity_property_name_delegate(AuthContextSafeHandle authContext);  // returns const char*
+            public delegate AuthContextSafeHandle.NativeAuthPropertyIterator grpcsharp_auth_context_property_iterator_delegate(AuthContextSafeHandle authContext);
+            public delegate IntPtr grpcsharp_auth_property_iterator_next_delegate(ref AuthContextSafeHandle.NativeAuthPropertyIterator iterator);  // returns const auth_property*
+            public delegate void grpcsharp_auth_context_release_delegate(IntPtr authContext);
+
             public delegate Timespec gprsharp_now_delegate(ClockType clockType);
             public delegate Timespec gprsharp_inf_future_delegate(ClockType clockType);
             public delegate Timespec gprsharp_inf_past_delegate(ClockType clockType);
diff --git a/src/csharp/Grpc.Core/Metadata.cs b/src/csharp/Grpc.Core/Metadata.cs
index 6fc715d..6e195b4 100644
--- a/src/csharp/Grpc.Core/Metadata.cs
+++ b/src/csharp/Grpc.Core/Metadata.cs
@@ -32,12 +32,10 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
-using System.Collections.Specialized;
-using System.Globalization;
-using System.Runtime.InteropServices;
 using System.Text;
 using System.Text.RegularExpressions;
 
+using Grpc.Core.Internal;
 using Grpc.Core.Utils;
 
 namespace Grpc.Core
@@ -242,7 +240,6 @@
         /// </summary>
         public class Entry
         {
-            private static readonly Encoding Encoding = Encoding.ASCII;
             private static readonly Regex ValidKeyRegex = new Regex("^[a-z0-9_-]+$");
 
             readonly string key;
@@ -306,7 +303,7 @@
                 {
                     if (valueBytes == null)
                     {
-                        return Encoding.GetBytes(value);
+                        return MarshalUtils.GetBytesASCII(value);
                     }
 
                     // defensive copy to guarantee immutability
@@ -324,7 +321,7 @@
                 get
                 {
                     GrpcPreconditions.CheckState(!IsBinary, "Cannot access string value of a binary metadata entry");
-                    return value ?? Encoding.GetString(valueBytes);
+                    return value ?? MarshalUtils.GetStringASCII(valueBytes);
                 }
             }
 
@@ -358,7 +355,7 @@
             /// </summary>
             internal byte[] GetSerializedValueUnsafe()
             {
-                return valueBytes ?? Encoding.GetBytes(value);
+                return valueBytes ?? MarshalUtils.GetBytesASCII(value);
             }
 
             /// <summary>
@@ -371,7 +368,7 @@
                 {
                     return new Entry(key, null, valueBytes);
                 }
-                return new Entry(key, Encoding.GetString(valueBytes), null);
+                return new Entry(key, MarshalUtils.GetStringASCII(valueBytes), null);
             }
 
             private static string NormalizeKey(string key)
diff --git a/src/csharp/Grpc.Core/ServerCallContext.cs b/src/csharp/Grpc.Core/ServerCallContext.cs
index 8f28fbc..c8950b7 100644
--- a/src/csharp/Grpc.Core/ServerCallContext.cs
+++ b/src/csharp/Grpc.Core/ServerCallContext.cs
@@ -32,7 +32,6 @@
 #endregion
 
 using System;
-using System.Runtime.CompilerServices;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -56,6 +55,7 @@
         private Status status = Status.DefaultSuccess;
         private Func<Metadata, Task> writeHeadersFunc;
         private IHasWriteOptions writeOptionsHolder;
+        private Lazy<AuthContext> authContext;
 
         internal ServerCallContext(CallSafeHandle callHandle, string method, string host, DateTime deadline, Metadata requestHeaders, CancellationToken cancellationToken,
             Func<Metadata, Task> writeHeadersFunc, IHasWriteOptions writeOptionsHolder)
@@ -68,6 +68,7 @@
             this.cancellationToken = cancellationToken;
             this.writeHeadersFunc = writeHeadersFunc;
             this.writeOptionsHolder = writeOptionsHolder;
+            this.authContext = new Lazy<AuthContext>(GetAuthContextEager);
         }
 
         /// <summary>
@@ -187,6 +188,26 @@
                 writeOptionsHolder.WriteOptions = value;
             }
         }
+
+        /// <summary>
+        /// Gets the <c>AuthContext</c> associated with this call.
+        /// Note: Access to AuthContext is an experimental API that can change without any prior notice.
+        /// </summary>
+        public AuthContext AuthContext
+        {
+            get
+            {
+                return authContext.Value;
+            }
+        }
+
+        private AuthContext GetAuthContextEager()
+        {
+            using (var authContextNative = callHandle.GetAuthContext())
+            {
+                return authContextNative.ToAuthContext();
+            }
+        }
     }
 
     /// <summary>
diff --git a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
index d22fe87..c96243b 100644
--- a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
+++ b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
@@ -27,18 +27,18 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
-    <Reference Include="nunit.framework">
-      <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
-    </Reference>
-    <Reference Include="nunitlite">
-      <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
-    </Reference>
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="System.Interactive.Async">
       <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
+    <Reference Include="nunit.framework">
+      <HintPath>..\packages\NUnit.3.6.0\lib\net45\nunit.framework.dll</HintPath>
+    </Reference>
+    <Reference Include="nunitlite">
+      <HintPath>..\packages\NUnitLite.3.6.0\lib\net45\nunitlite.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.2.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.Examples.Tests/packages.config b/src/csharp/Grpc.Examples.Tests/packages.config
index 0fed4db..8a7f7a0 100644
--- a/src/csharp/Grpc.Examples.Tests/packages.config
+++ b/src/csharp/Grpc.Examples.Tests/packages.config
@@ -1,7 +1,7 @@
 ﻿<?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
-  <package id="NUnit" version="3.2.0" targetFramework="net45" />
-  <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.2.0" targetFramework="net45" />
+  <package id="NUnit" version="3.6.0" targetFramework="net45" />
+  <package id="NUnitLite" version="3.6.0" targetFramework="net45" />
   <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples.Tests/project.json b/src/csharp/Grpc.Examples.Tests/project.json
index e509621..4ffcaf5 100644
--- a/src/csharp/Grpc.Examples.Tests/project.json
+++ b/src/csharp/Grpc.Examples.Tests/project.json
@@ -45,8 +45,8 @@
     "Grpc.Examples": {
       "target": "project"
     },
-    "NUnit": "3.2.0",
-    "NUnitLite": "3.2.0-*"
+    "NUnit": "3.6.0",
+    "NUnitLite": "3.6.0"
   },
   "frameworks": {
     "net45": { },
diff --git a/src/csharp/Grpc.Examples/Grpc.Examples.csproj b/src/csharp/Grpc.Examples/Grpc.Examples.csproj
index 44acb6c..fc92754 100644
--- a/src/csharp/Grpc.Examples/Grpc.Examples.csproj
+++ b/src/csharp/Grpc.Examples/Grpc.Examples.csproj
@@ -3,8 +3,6 @@
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProductVersion>10.0.0</ProductVersion>
-    <SchemaVersion>2.0</SchemaVersion>
     <ProjectGuid>{7DC1433E-3225-42C7-B7EA-546D56E27A4B}</ProjectGuid>
     <OutputType>Library</OutputType>
     <RootNamespace>Grpc.Examples</RootNamespace>
@@ -28,17 +26,17 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="nunit.framework">
-      <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
-    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Data.Linq" />
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="System.Interactive.Async">
       <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
+    <Reference Include="nunit.framework">
+      <HintPath>..\packages\NUnit.3.6.0\lib\net45\nunit.framework.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.2.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.Examples/packages.config b/src/csharp/Grpc.Examples/packages.config
index c7db26b..79a8980 100644
--- a/src/csharp/Grpc.Examples/packages.config
+++ b/src/csharp/Grpc.Examples/packages.config
@@ -1,6 +1,6 @@
 ﻿<?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
-  <package id="NUnit" version="3.2.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.2.0" targetFramework="net45" />
+  <package id="NUnit" version="3.6.0" targetFramework="net45" />
   <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples/project.json b/src/csharp/Grpc.Examples/project.json
index 21a730c..3ee0a71 100644
--- a/src/csharp/Grpc.Examples/project.json
+++ b/src/csharp/Grpc.Examples/project.json
@@ -6,15 +6,10 @@
     "Grpc.Core": {
       "target": "project"
     },
-    "Google.Protobuf": "3.0.0"
+    "Google.Protobuf": "3.2.0"
   },
   "frameworks": {
-    "net45": {
-      "frameworkAssemblies": {
-        "System.Runtime": "",
-        "System.IO": ""
-      }
-    },
+    "net45": {},
     "netcoreapp1.0": {
       "dependencies": {
         "Microsoft.NETCore.App": {
diff --git a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
index b82f976..71f0ee1 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
+++ b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
@@ -35,14 +35,14 @@
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.2.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
     <Reference Include="nunit.framework">
-      <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
+      <HintPath>..\packages\NUnit.3.6.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="nunitlite">
-      <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
-    </Reference>
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
+      <HintPath>..\packages\NUnitLite.3.6.0\lib\net45\nunitlite.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/src/csharp/Grpc.HealthCheck.Tests/packages.config b/src/csharp/Grpc.HealthCheck.Tests/packages.config
index e796d6b..48c94bc 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/packages.config
+++ b/src/csharp/Grpc.HealthCheck.Tests/packages.config
@@ -1,6 +1,6 @@
 ﻿<?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
-  <package id="NUnit" version="3.2.0" targetFramework="net45" />
-  <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.2.0" targetFramework="net45" />
+  <package id="NUnit" version="3.6.0" targetFramework="net45" />
+  <package id="NUnitLite" version="3.6.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.HealthCheck.Tests/project.json b/src/csharp/Grpc.HealthCheck.Tests/project.json
index 654454d..2814cbf 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/project.json
+++ b/src/csharp/Grpc.HealthCheck.Tests/project.json
@@ -45,8 +45,8 @@
     "Grpc.HealthCheck": {
       "target": "project"
     },
-    "NUnit": "3.2.0",
-    "NUnitLite": "3.2.0-*"
+    "NUnit": "3.6.0",
+    "NUnitLite": "3.6.0"
   },
   "frameworks": {
     "net45": { },
diff --git a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
index 63aa185..171525b 100644
--- a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
+++ b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
@@ -36,12 +36,12 @@
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     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="System.Interactive.Async">
       <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.2.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.HealthCheck/packages.config b/src/csharp/Grpc.HealthCheck/packages.config
index 5ab40b7..eec292b 100644
--- a/src/csharp/Grpc.HealthCheck/packages.config
+++ b/src/csharp/Grpc.HealthCheck/packages.config
@@ -1,5 +1,5 @@
 ﻿<?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.2.0" targetFramework="net45" />
   <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index 5d3b2f5..9e9d245 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -22,15 +22,10 @@
   },
   "dependencies": {
     "Grpc.Core": "1.2.0-dev",
-    "Google.Protobuf": "3.0.0"
+    "Google.Protobuf": "3.2.0"
   },
   "frameworks": {
-    "net45": {
-      "frameworkAssemblies": {
-        "System.Runtime": "",
-        "System.IO": ""
-      }
-    },
+    "net45": {},
     "netstandard1.5": {
       "dependencies": {
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diff --git a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
index 6bb5f33..a793f3f 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
@@ -34,33 +34,6 @@
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     <Reference Include="System.Net.Http" />
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-    </Reference>
-    <Reference Include="Newtonsoft.Json">
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-    <Reference Include="Google.Apis.Core">
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-    <Reference Include="Google.Apis.PlatformServices">
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-    </Reference>
   </ItemGroup>
   <ItemGroup>
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@@ -82,6 +55,5 @@
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   <ItemGroup>
     <None Include="Grpc.IntegrationTesting.Client.project.json" />
-    <None Include="packages.config" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/packages.config b/src/csharp/Grpc.IntegrationTesting.Client/packages.config
deleted file mode 100644
index 11c6375..0000000
--- a/src/csharp/Grpc.IntegrationTesting.Client/packages.config
+++ /dev/null
@@ -1,10 +0,0 @@
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-  <package id="Zlib.Portable.Signed" version="1.11.0" targetFramework="net45" />
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\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/packages.config b/src/csharp/Grpc.IntegrationTesting.QpsWorker/packages.config
deleted file mode 100644
index 79ece06..0000000
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/packages.config
+++ /dev/null
@@ -1,3 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<packages>
-</packages>
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
index 081dc24..80d3636 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
@@ -34,33 +34,6 @@
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@@ -82,6 +55,5 @@
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-    <None Include="packages.config" />
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\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/packages.config b/src/csharp/Grpc.IntegrationTesting.Server/packages.config
deleted file mode 100644
index 11c6375..0000000
--- a/src/csharp/Grpc.IntegrationTesting.Server/packages.config
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diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/packages.config b/src/csharp/Grpc.IntegrationTesting.StressClient/packages.config
deleted file mode 100644
index 79ece06..0000000
--- a/src/csharp/Grpc.IntegrationTesting.StressClient/packages.config
+++ /dev/null
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-            "dWNjZXNzGAcgAygIEhYKDnNlcnZlcl9zdWNjZXNzGAggAygIEjkKD3JlcXVl",
-            "c3RfcmVzdWx0cxgJIAMoCzIgLmdycGMudGVzdGluZy5SZXF1ZXN0UmVzdWx0",
-            "Q291bnQqQQoKQ2xpZW50VHlwZRIPCgtTWU5DX0NMSUVOVBAAEhAKDEFTWU5D",
-            "X0NMSUVOVBABEhAKDE9USEVSX0NMSUVOVBACKlsKClNlcnZlclR5cGUSDwoL",
-            "U1lOQ19TRVJWRVIQABIQCgxBU1lOQ19TRVJWRVIQARIYChRBU1lOQ19HRU5F",
-            "UklDX1NFUlZFUhACEhAKDE9USEVSX1NFUlZFUhADKiMKB1JwY1R5cGUSCQoF",
-            "VU5BUlkQABINCglTVFJFQU1JTkcQAWIGcHJvdG8z"));
+            "X2hvc3Rfb3ZlcnJpZGUYAiABKAkiTQoKQ2hhbm5lbEFyZxIMCgRuYW1lGAEg",
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+            "ASADKAkSLQoLY2xpZW50X3R5cGUYAiABKA4yGC5ncnBjLnRlc3RpbmcuQ2xp",
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+            "c3RpbmcuTWFya0gAQgkKB2FyZ3R5cGUitAIKDFNlcnZlckNvbmZpZxItCgtz",
+            "ZXJ2ZXJfdHlwZRgBIAEoDjIYLmdycGMudGVzdGluZy5TZXJ2ZXJUeXBlEjUK",
+            "D3NlY3VyaXR5X3BhcmFtcxgCIAEoCzIcLmdycGMudGVzdGluZy5TZWN1cml0",
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+            "c3QYCiADKAUSGAoQb3RoZXJfc2VydmVyX2FwaRgLIAEoCRIcChNyZXNvdXJj",
+            "ZV9xdW90YV9zaXplGOkHIAEoBSJoCgpTZXJ2ZXJBcmdzEisKBXNldHVwGAEg",
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+            "U3RhdHVzEigKBXN0YXRzGAEgASgLMhkuZ3JwYy50ZXN0aW5nLlNlcnZlclN0",
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+            "CFNjZW5hcmlvEgwKBG5hbWUYASABKAkSMQoNY2xpZW50X2NvbmZpZxgCIAEo",
+            "CzIaLmdycGMudGVzdGluZy5DbGllbnRDb25maWcSEwoLbnVtX2NsaWVudHMY",
+            "AyABKAUSMQoNc2VydmVyX2NvbmZpZxgEIAEoCzIaLmdycGMudGVzdGluZy5T",
+            "ZXJ2ZXJDb25maWcSEwoLbnVtX3NlcnZlcnMYBSABKAUSFgoOd2FybXVwX3Nl",
+            "Y29uZHMYBiABKAUSGQoRYmVuY2htYXJrX3NlY29uZHMYByABKAUSIAoYc3Bh",
+            "d25fbG9jYWxfd29ya2VyX2NvdW50GAggASgFIjYKCVNjZW5hcmlvcxIpCglz",
+            "Y2VuYXJpb3MYASADKAsyFi5ncnBjLnRlc3RpbmcuU2NlbmFyaW8i+AIKFVNj",
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+            "ZXJ2ZXJfY29yZRgCIAEoARIaChJzZXJ2ZXJfc3lzdGVtX3RpbWUYAyABKAES",
+            "GAoQc2VydmVyX3VzZXJfdGltZRgEIAEoARIaChJjbGllbnRfc3lzdGVtX3Rp",
+            "bWUYBSABKAESGAoQY2xpZW50X3VzZXJfdGltZRgGIAEoARISCgpsYXRlbmN5",
+            "XzUwGAcgASgBEhIKCmxhdGVuY3lfOTAYCCABKAESEgoKbGF0ZW5jeV85NRgJ",
+            "IAEoARISCgpsYXRlbmN5Xzk5GAogASgBEhMKC2xhdGVuY3lfOTk5GAsgASgB",
+            "EhgKEHNlcnZlcl9jcHVfdXNhZ2UYDCABKAESJgoec3VjY2Vzc2Z1bF9yZXF1",
+            "ZXN0c19wZXJfc2Vjb25kGA0gASgBEiIKGmZhaWxlZF9yZXF1ZXN0c19wZXJf",
+            "c2Vjb25kGA4gASgBIoMDCg5TY2VuYXJpb1Jlc3VsdBIoCghzY2VuYXJpbxgB",
+            "IAEoCzIWLmdycGMudGVzdGluZy5TY2VuYXJpbxIuCglsYXRlbmNpZXMYAiAB",
+            "KAsyGy5ncnBjLnRlc3RpbmcuSGlzdG9ncmFtRGF0YRIvCgxjbGllbnRfc3Rh",
+            "dHMYAyADKAsyGS5ncnBjLnRlc3RpbmcuQ2xpZW50U3RhdHMSLwoMc2VydmVy",
+            "X3N0YXRzGAQgAygLMhkuZ3JwYy50ZXN0aW5nLlNlcnZlclN0YXRzEhQKDHNl",
+            "cnZlcl9jb3JlcxgFIAMoBRI0CgdzdW1tYXJ5GAYgASgLMiMuZ3JwYy50ZXN0",
+            "aW5nLlNjZW5hcmlvUmVzdWx0U3VtbWFyeRIWCg5jbGllbnRfc3VjY2VzcxgH",
+            "IAMoCBIWCg5zZXJ2ZXJfc3VjY2VzcxgIIAMoCBI5Cg9yZXF1ZXN0X3Jlc3Vs",
+            "dHMYCSADKAsyIC5ncnBjLnRlc3RpbmcuUmVxdWVzdFJlc3VsdENvdW50KkEK",
+            "CkNsaWVudFR5cGUSDwoLU1lOQ19DTElFTlQQABIQCgxBU1lOQ19DTElFTlQQ",
+            "ARIQCgxPVEhFUl9DTElFTlQQAipbCgpTZXJ2ZXJUeXBlEg8KC1NZTkNfU0VS",
+            "VkVSEAASEAoMQVNZTkNfU0VSVkVSEAESGAoUQVNZTkNfR0VORVJJQ19TRVJW",
+            "RVIQAhIQCgxPVEhFUl9TRVJWRVIQAyojCgdScGNUeXBlEgkKBVVOQVJZEAAS",
+            "DQoJU1RSRUFNSU5HEAFiBnByb3RvMw=="));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
           new pbr::FileDescriptor[] { global::Grpc.Testing.PayloadsReflection.Descriptor, global::Grpc.Testing.StatsReflection.Descriptor, },
           new pbr::GeneratedClrTypeInfo(new[] {typeof(global::Grpc.Testing.ClientType), typeof(global::Grpc.Testing.ServerType), typeof(global::Grpc.Testing.RpcType), }, new pbr::GeneratedClrTypeInfo[] {
@@ -94,7 +97,8 @@
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ClosedLoopParams), global::Grpc.Testing.ClosedLoopParams.Parser, null, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.LoadParams), global::Grpc.Testing.LoadParams.Parser, new[]{ "ClosedLoop", "Poisson" }, new[]{ "Load" }, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.SecurityParams), global::Grpc.Testing.SecurityParams.Parser, new[]{ "UseTestCa", "ServerHostOverride" }, null, null, null),
-            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ClientConfig), global::Grpc.Testing.ClientConfig.Parser, new[]{ "ServerTargets", "ClientType", "SecurityParams", "OutstandingRpcsPerChannel", "ClientChannels", "AsyncClientThreads", "RpcType", "LoadParams", "PayloadConfig", "HistogramParams", "CoreList", "CoreLimit", "OtherClientApi" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ChannelArg), global::Grpc.Testing.ChannelArg.Parser, new[]{ "Name", "StrValue", "IntValue" }, new[]{ "Value" }, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ClientConfig), global::Grpc.Testing.ClientConfig.Parser, new[]{ "ServerTargets", "ClientType", "SecurityParams", "OutstandingRpcsPerChannel", "ClientChannels", "AsyncClientThreads", "RpcType", "LoadParams", "PayloadConfig", "HistogramParams", "CoreList", "CoreLimit", "OtherClientApi", "ChannelArgs" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ClientStatus), global::Grpc.Testing.ClientStatus.Parser, new[]{ "Stats" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.Mark), global::Grpc.Testing.Mark.Parser, new[]{ "Reset" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ClientArgs), global::Grpc.Testing.ClientArgs.Parser, new[]{ "Setup", "Mark" }, new[]{ "Argtype" }, null, null),
@@ -116,13 +120,13 @@
   #region Enums
   public enum ClientType {
     /// <summary>
-    ///  Many languages support a basic distinction between using
-    ///  sync or async client, and this allows the specification
+    /// Many languages support a basic distinction between using
+    /// sync or async client, and this allows the specification
     /// </summary>
     [pbr::OriginalName("SYNC_CLIENT")] SyncClient = 0,
     [pbr::OriginalName("ASYNC_CLIENT")] AsyncClient = 1,
     /// <summary>
-    ///  used for some language-specific variants
+    /// used for some language-specific variants
     /// </summary>
     [pbr::OriginalName("OTHER_CLIENT")] OtherClient = 2,
   }
@@ -132,7 +136,7 @@
     [pbr::OriginalName("ASYNC_SERVER")] AsyncServer = 1,
     [pbr::OriginalName("ASYNC_GENERIC_SERVER")] AsyncGenericServer = 2,
     /// <summary>
-    ///  used for some language-specific variants
+    /// used for some language-specific variants
     /// </summary>
     [pbr::OriginalName("OTHER_SERVER")] OtherServer = 3,
   }
@@ -146,8 +150,8 @@
 
   #region Messages
   /// <summary>
-  ///  Parameters of poisson process distribution, which is a good representation
-  ///  of activity coming in from independent identical stationary sources.
+  /// Parameters of poisson process distribution, which is a good representation
+  /// of activity coming in from independent identical stationary sources.
   /// </summary>
   public sealed partial class PoissonParams : pb::IMessage<PoissonParams> {
     private static readonly pb::MessageParser<PoissonParams> _parser = new pb::MessageParser<PoissonParams>(() => new PoissonParams());
@@ -185,7 +189,7 @@
     public const int OfferedLoadFieldNumber = 1;
     private double offeredLoad_;
     /// <summary>
-    ///  The rate of arrivals (a.k.a. lambda parameter of the exp distribution).
+    /// The rate of arrivals (a.k.a. lambda parameter of the exp distribution).
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double OfferedLoad {
@@ -270,8 +274,8 @@
   }
 
   /// <summary>
-  ///  Once an RPC finishes, immediately start a new one.
-  ///  No configuration parameters needed.
+  /// Once an RPC finishes, immediately start a new one.
+  /// No configuration parameters needed.
   /// </summary>
   public sealed partial class ClosedLoopParams : pb::IMessage<ClosedLoopParams> {
     private static readonly pb::MessageParser<ClosedLoopParams> _parser = new pb::MessageParser<ClosedLoopParams>(() => new ClosedLoopParams());
@@ -549,7 +553,7 @@
   }
 
   /// <summary>
-  ///  presence of SecurityParams implies use of TLS
+  /// presence of SecurityParams implies use of TLS
   /// </summary>
   public sealed partial class SecurityParams : pb::IMessage<SecurityParams> {
     private static readonly pb::MessageParser<SecurityParams> _parser = new pb::MessageParser<SecurityParams>(() => new SecurityParams());
@@ -696,6 +700,210 @@
 
   }
 
+  public sealed partial class ChannelArg : pb::IMessage<ChannelArg> {
+    private static readonly pb::MessageParser<ChannelArg> _parser = new pb::MessageParser<ChannelArg>(() => new ChannelArg());
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<ChannelArg> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[4]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ChannelArg() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ChannelArg(ChannelArg other) : this() {
+      name_ = other.name_;
+      switch (other.ValueCase) {
+        case ValueOneofCase.StrValue:
+          StrValue = other.StrValue;
+          break;
+        case ValueOneofCase.IntValue:
+          IntValue = other.IntValue;
+          break;
+      }
+
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ChannelArg Clone() {
+      return new ChannelArg(this);
+    }
+
+    /// <summary>Field number for the "name" field.</summary>
+    public const int NameFieldNumber = 1;
+    private string name_ = "";
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public string Name {
+      get { return name_; }
+      set {
+        name_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+      }
+    }
+
+    /// <summary>Field number for the "str_value" field.</summary>
+    public const int StrValueFieldNumber = 2;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public string StrValue {
+      get { return valueCase_ == ValueOneofCase.StrValue ? (string) value_ : ""; }
+      set {
+        value_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+        valueCase_ = ValueOneofCase.StrValue;
+      }
+    }
+
+    /// <summary>Field number for the "int_value" field.</summary>
+    public const int IntValueFieldNumber = 3;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int IntValue {
+      get { return valueCase_ == ValueOneofCase.IntValue ? (int) value_ : 0; }
+      set {
+        value_ = value;
+        valueCase_ = ValueOneofCase.IntValue;
+      }
+    }
+
+    private object value_;
+    /// <summary>Enum of possible cases for the "value" oneof.</summary>
+    public enum ValueOneofCase {
+      None = 0,
+      StrValue = 2,
+      IntValue = 3,
+    }
+    private ValueOneofCase valueCase_ = ValueOneofCase.None;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public ValueOneofCase ValueCase {
+      get { return valueCase_; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void ClearValue() {
+      valueCase_ = ValueOneofCase.None;
+      value_ = null;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as ChannelArg);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(ChannelArg other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (Name != other.Name) return false;
+      if (StrValue != other.StrValue) return false;
+      if (IntValue != other.IntValue) return false;
+      if (ValueCase != other.ValueCase) return false;
+      return true;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      if (Name.Length != 0) hash ^= Name.GetHashCode();
+      if (valueCase_ == ValueOneofCase.StrValue) hash ^= StrValue.GetHashCode();
+      if (valueCase_ == ValueOneofCase.IntValue) hash ^= IntValue.GetHashCode();
+      hash ^= (int) valueCase_;
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (Name.Length != 0) {
+        output.WriteRawTag(10);
+        output.WriteString(Name);
+      }
+      if (valueCase_ == ValueOneofCase.StrValue) {
+        output.WriteRawTag(18);
+        output.WriteString(StrValue);
+      }
+      if (valueCase_ == ValueOneofCase.IntValue) {
+        output.WriteRawTag(24);
+        output.WriteInt32(IntValue);
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      if (Name.Length != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeStringSize(Name);
+      }
+      if (valueCase_ == ValueOneofCase.StrValue) {
+        size += 1 + pb::CodedOutputStream.ComputeStringSize(StrValue);
+      }
+      if (valueCase_ == ValueOneofCase.IntValue) {
+        size += 1 + pb::CodedOutputStream.ComputeInt32Size(IntValue);
+      }
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(ChannelArg other) {
+      if (other == null) {
+        return;
+      }
+      if (other.Name.Length != 0) {
+        Name = other.Name;
+      }
+      switch (other.ValueCase) {
+        case ValueOneofCase.StrValue:
+          StrValue = other.StrValue;
+          break;
+        case ValueOneofCase.IntValue:
+          IntValue = other.IntValue;
+          break;
+      }
+
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 10: {
+            Name = input.ReadString();
+            break;
+          }
+          case 18: {
+            StrValue = input.ReadString();
+            break;
+          }
+          case 24: {
+            IntValue = input.ReadInt32();
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
   public sealed partial class ClientConfig : pb::IMessage<ClientConfig> {
     private static readonly pb::MessageParser<ClientConfig> _parser = new pb::MessageParser<ClientConfig>(() => new ClientConfig());
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -703,7 +911,7 @@
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[4]; }
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[5]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -733,6 +941,7 @@
       coreList_ = other.coreList_.Clone();
       coreLimit_ = other.coreLimit_;
       otherClientApi_ = other.otherClientApi_;
+      channelArgs_ = other.channelArgs_.Clone();
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -746,7 +955,7 @@
         = pb::FieldCodec.ForString(10);
     private readonly pbc::RepeatedField<string> serverTargets_ = new pbc::RepeatedField<string>();
     /// <summary>
-    ///  List of targets to connect to. At least one target needs to be specified.
+    /// List of targets to connect to. At least one target needs to be specified.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public pbc::RepeatedField<string> ServerTargets {
@@ -779,8 +988,8 @@
     public const int OutstandingRpcsPerChannelFieldNumber = 4;
     private int outstandingRpcsPerChannel_;
     /// <summary>
-    ///  How many concurrent RPCs to start for each channel.
-    ///  For synchronous client, use a separate thread for each outstanding RPC.
+    /// How many concurrent RPCs to start for each channel.
+    /// For synchronous client, use a separate thread for each outstanding RPC.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int OutstandingRpcsPerChannel {
@@ -794,8 +1003,8 @@
     public const int ClientChannelsFieldNumber = 5;
     private int clientChannels_;
     /// <summary>
-    ///  Number of independent client channels to create.
-    ///  i-th channel will connect to server_target[i % server_targets.size()]
+    /// Number of independent client channels to create.
+    /// i-th channel will connect to server_target[i % server_targets.size()]
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int ClientChannels {
@@ -809,7 +1018,7 @@
     public const int AsyncClientThreadsFieldNumber = 7;
     private int asyncClientThreads_;
     /// <summary>
-    ///  Only for async client. Number of threads to use to start/manage RPCs.
+    /// Only for async client. Number of threads to use to start/manage RPCs.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int AsyncClientThreads {
@@ -834,7 +1043,7 @@
     public const int LoadParamsFieldNumber = 10;
     private global::Grpc.Testing.LoadParams loadParams_;
     /// <summary>
-    ///  The requested load for the entire client (aggregated over all the threads).
+    /// The requested load for the entire client (aggregated over all the threads).
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.LoadParams LoadParams {
@@ -872,7 +1081,7 @@
         = pb::FieldCodec.ForInt32(106);
     private readonly pbc::RepeatedField<int> coreList_ = new pbc::RepeatedField<int>();
     /// <summary>
-    ///  Specify the cores we should run the client on, if desired
+    /// Specify the cores we should run the client on, if desired
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public pbc::RepeatedField<int> CoreList {
@@ -894,7 +1103,7 @@
     public const int OtherClientApiFieldNumber = 15;
     private string otherClientApi_ = "";
     /// <summary>
-    ///  If we use an OTHER_CLIENT client_type, this string gives more detail
+    /// If we use an OTHER_CLIENT client_type, this string gives more detail
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public string OtherClientApi {
@@ -904,6 +1113,16 @@
       }
     }
 
+    /// <summary>Field number for the "channel_args" field.</summary>
+    public const int ChannelArgsFieldNumber = 16;
+    private static readonly pb::FieldCodec<global::Grpc.Testing.ChannelArg> _repeated_channelArgs_codec
+        = pb::FieldCodec.ForMessage(130, global::Grpc.Testing.ChannelArg.Parser);
+    private readonly pbc::RepeatedField<global::Grpc.Testing.ChannelArg> channelArgs_ = new pbc::RepeatedField<global::Grpc.Testing.ChannelArg>();
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public pbc::RepeatedField<global::Grpc.Testing.ChannelArg> ChannelArgs {
+      get { return channelArgs_; }
+    }
+
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public override bool Equals(object other) {
       return Equals(other as ClientConfig);
@@ -930,6 +1149,7 @@
       if(!coreList_.Equals(other.coreList_)) return false;
       if (CoreLimit != other.CoreLimit) return false;
       if (OtherClientApi != other.OtherClientApi) return false;
+      if(!channelArgs_.Equals(other.channelArgs_)) return false;
       return true;
     }
 
@@ -949,6 +1169,7 @@
       hash ^= coreList_.GetHashCode();
       if (CoreLimit != 0) hash ^= CoreLimit.GetHashCode();
       if (OtherClientApi.Length != 0) hash ^= OtherClientApi.GetHashCode();
+      hash ^= channelArgs_.GetHashCode();
       return hash;
     }
 
@@ -1005,6 +1226,7 @@
         output.WriteRawTag(122);
         output.WriteString(OtherClientApi);
       }
+      channelArgs_.WriteTo(output, _repeated_channelArgs_codec);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -1045,6 +1267,7 @@
       if (OtherClientApi.Length != 0) {
         size += 1 + pb::CodedOutputStream.ComputeStringSize(OtherClientApi);
       }
+      size += channelArgs_.CalculateSize(_repeated_channelArgs_codec);
       return size;
     }
 
@@ -1100,6 +1323,7 @@
       if (other.OtherClientApi.Length != 0) {
         OtherClientApi = other.OtherClientApi;
       }
+      channelArgs_.Add(other.channelArgs_);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -1175,6 +1399,10 @@
             OtherClientApi = input.ReadString();
             break;
           }
+          case 130: {
+            channelArgs_.AddEntriesFrom(input, _repeated_channelArgs_codec);
+            break;
+          }
         }
       }
     }
@@ -1188,7 +1416,7 @@
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[5]; }
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[6]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -1305,7 +1533,7 @@
   }
 
   /// <summary>
-  ///  Request current stats
+  /// Request current stats
   /// </summary>
   public sealed partial class Mark : pb::IMessage<Mark> {
     private static readonly pb::MessageParser<Mark> _parser = new pb::MessageParser<Mark>(() => new Mark());
@@ -1314,7 +1542,7 @@
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[6]; }
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[7]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -1343,7 +1571,7 @@
     public const int ResetFieldNumber = 1;
     private bool reset_;
     /// <summary>
-    ///  if true, the stats will be reset after taking their snapshot.
+    /// if true, the stats will be reset after taking their snapshot.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public bool Reset {
@@ -1434,7 +1662,7 @@
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[7]; }
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[8]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -1620,7 +1848,7 @@
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[8]; }
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[9]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -1679,7 +1907,7 @@
     public const int PortFieldNumber = 4;
     private int port_;
     /// <summary>
-    ///  Port on which to listen. Zero means pick unused port.
+    /// Port on which to listen. Zero means pick unused port.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int Port {
@@ -1693,7 +1921,7 @@
     public const int AsyncServerThreadsFieldNumber = 7;
     private int asyncServerThreads_;
     /// <summary>
-    ///  Only for async server. Number of threads used to serve the requests.
+    /// Only for async server. Number of threads used to serve the requests.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int AsyncServerThreads {
@@ -1707,7 +1935,7 @@
     public const int CoreLimitFieldNumber = 8;
     private int coreLimit_;
     /// <summary>
-    ///  Specify the number of cores to limit server to, if desired
+    /// Specify the number of cores to limit server to, if desired
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int CoreLimit {
@@ -1721,7 +1949,10 @@
     public const int PayloadConfigFieldNumber = 9;
     private global::Grpc.Testing.PayloadConfig payloadConfig_;
     /// <summary>
-    ///  payload config, used in generic server
+    /// payload config, used in generic server.
+    /// Note this must NOT be used in proto (non-generic) servers. For proto servers,
+    /// 'response sizes' must be configured from the 'response_size' field of the
+    /// 'SimpleRequest' objects in RPC requests.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.PayloadConfig PayloadConfig {
@@ -1737,7 +1968,7 @@
         = pb::FieldCodec.ForInt32(82);
     private readonly pbc::RepeatedField<int> coreList_ = new pbc::RepeatedField<int>();
     /// <summary>
-    ///  Specify the cores we should run the server on, if desired
+    /// Specify the cores we should run the server on, if desired
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public pbc::RepeatedField<int> CoreList {
@@ -1748,7 +1979,7 @@
     public const int OtherServerApiFieldNumber = 11;
     private string otherServerApi_ = "";
     /// <summary>
-    ///  If we use an OTHER_SERVER client_type, this string gives more detail
+    /// If we use an OTHER_SERVER client_type, this string gives more detail
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public string OtherServerApi {
@@ -1762,7 +1993,7 @@
     public const int ResourceQuotaSizeFieldNumber = 1001;
     private int resourceQuotaSize_;
     /// <summary>
-    ///  Buffer pool size (no buffer pool specified if unset)
+    /// Buffer pool size (no buffer pool specified if unset)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int ResourceQuotaSize {
@@ -1987,7 +2218,7 @@
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[9]; }
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[10]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -2173,7 +2404,7 @@
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[10]; }
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[11]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -2215,7 +2446,7 @@
     public const int PortFieldNumber = 2;
     private int port_;
     /// <summary>
-    ///  the port bound by the server
+    /// the port bound by the server
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int Port {
@@ -2229,7 +2460,7 @@
     public const int CoresFieldNumber = 3;
     private int cores_;
     /// <summary>
-    ///  Number of cores available to the server
+    /// Number of cores available to the server
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int Cores {
@@ -2358,7 +2589,7 @@
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[11]; }
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[12]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -2447,7 +2678,7 @@
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[12]; }
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[13]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -2476,7 +2707,7 @@
     public const int CoresFieldNumber = 1;
     private int cores_;
     /// <summary>
-    ///  Number of cores available on the server
+    /// Number of cores available on the server
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int Cores {
@@ -2567,7 +2798,7 @@
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[13]; }
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[14]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -2650,7 +2881,7 @@
   }
 
   /// <summary>
-  ///  A single performance scenario: input to qps_json_driver
+  /// A single performance scenario: input to qps_json_driver
   /// </summary>
   public sealed partial class Scenario : pb::IMessage<Scenario> {
     private static readonly pb::MessageParser<Scenario> _parser = new pb::MessageParser<Scenario>(() => new Scenario());
@@ -2659,7 +2890,7 @@
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[14]; }
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[15]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -2695,7 +2926,7 @@
     public const int NameFieldNumber = 1;
     private string name_ = "";
     /// <summary>
-    ///  Human readable name for this scenario
+    /// Human readable name for this scenario
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public string Name {
@@ -2709,7 +2940,7 @@
     public const int ClientConfigFieldNumber = 2;
     private global::Grpc.Testing.ClientConfig clientConfig_;
     /// <summary>
-    ///  Client configuration
+    /// Client configuration
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.ClientConfig ClientConfig {
@@ -2723,7 +2954,7 @@
     public const int NumClientsFieldNumber = 3;
     private int numClients_;
     /// <summary>
-    ///  Number of clients to start for the test
+    /// Number of clients to start for the test
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int NumClients {
@@ -2737,7 +2968,7 @@
     public const int ServerConfigFieldNumber = 4;
     private global::Grpc.Testing.ServerConfig serverConfig_;
     /// <summary>
-    ///  Server configuration
+    /// Server configuration
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.ServerConfig ServerConfig {
@@ -2751,7 +2982,7 @@
     public const int NumServersFieldNumber = 5;
     private int numServers_;
     /// <summary>
-    ///  Number of servers to start for the test
+    /// Number of servers to start for the test
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int NumServers {
@@ -2765,7 +2996,7 @@
     public const int WarmupSecondsFieldNumber = 6;
     private int warmupSeconds_;
     /// <summary>
-    ///  Warmup period, in seconds
+    /// Warmup period, in seconds
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int WarmupSeconds {
@@ -2779,7 +3010,7 @@
     public const int BenchmarkSecondsFieldNumber = 7;
     private int benchmarkSeconds_;
     /// <summary>
-    ///  Benchmark time, in seconds
+    /// Benchmark time, in seconds
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int BenchmarkSeconds {
@@ -2793,7 +3024,7 @@
     public const int SpawnLocalWorkerCountFieldNumber = 8;
     private int spawnLocalWorkerCount_;
     /// <summary>
-    ///  Number of workers to spawn locally (usually zero)
+    /// Number of workers to spawn locally (usually zero)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int SpawnLocalWorkerCount {
@@ -3002,7 +3233,7 @@
   }
 
   /// <summary>
-  ///  A set of scenarios to be run with qps_json_driver
+  /// A set of scenarios to be run with qps_json_driver
   /// </summary>
   public sealed partial class Scenarios : pb::IMessage<Scenarios> {
     private static readonly pb::MessageParser<Scenarios> _parser = new pb::MessageParser<Scenarios>(() => new Scenarios());
@@ -3011,7 +3242,7 @@
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[15]; }
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[16]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -3114,8 +3345,8 @@
   }
 
   /// <summary>
-  ///  Basic summary that can be computed from ClientStats and ServerStats
-  ///  once the scenario has finished.
+  /// Basic summary that can be computed from ClientStats and ServerStats
+  /// once the scenario has finished.
   /// </summary>
   public sealed partial class ScenarioResultSummary : pb::IMessage<ScenarioResultSummary> {
     private static readonly pb::MessageParser<ScenarioResultSummary> _parser = new pb::MessageParser<ScenarioResultSummary>(() => new ScenarioResultSummary());
@@ -3124,7 +3355,7 @@
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[16]; }
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[17]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -3166,7 +3397,7 @@
     public const int QpsFieldNumber = 1;
     private double qps_;
     /// <summary>
-    ///  Total number of operations per second over all clients.
+    /// Total number of operations per second over all clients.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double Qps {
@@ -3180,7 +3411,7 @@
     public const int QpsPerServerCoreFieldNumber = 2;
     private double qpsPerServerCore_;
     /// <summary>
-    ///  QPS per one server core.
+    /// QPS per one server core.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double QpsPerServerCore {
@@ -3194,7 +3425,7 @@
     public const int ServerSystemTimeFieldNumber = 3;
     private double serverSystemTime_;
     /// <summary>
-    ///  server load based on system_time (0.85 => 85%)
+    /// server load based on system_time (0.85 => 85%)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double ServerSystemTime {
@@ -3208,7 +3439,7 @@
     public const int ServerUserTimeFieldNumber = 4;
     private double serverUserTime_;
     /// <summary>
-    ///  server load based on user_time (0.85 => 85%)
+    /// server load based on user_time (0.85 => 85%)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double ServerUserTime {
@@ -3222,7 +3453,7 @@
     public const int ClientSystemTimeFieldNumber = 5;
     private double clientSystemTime_;
     /// <summary>
-    ///  client load based on system_time (0.85 => 85%)
+    /// client load based on system_time (0.85 => 85%)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double ClientSystemTime {
@@ -3236,7 +3467,7 @@
     public const int ClientUserTimeFieldNumber = 6;
     private double clientUserTime_;
     /// <summary>
-    ///  client load based on user_time (0.85 => 85%)
+    /// client load based on user_time (0.85 => 85%)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double ClientUserTime {
@@ -3250,7 +3481,7 @@
     public const int Latency50FieldNumber = 7;
     private double latency50_;
     /// <summary>
-    ///  X% latency percentiles (in nanoseconds)
+    /// X% latency percentiles (in nanoseconds)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double Latency50 {
@@ -3308,7 +3539,7 @@
     public const int ServerCpuUsageFieldNumber = 12;
     private double serverCpuUsage_;
     /// <summary>
-    ///  server cpu usage percentage
+    /// server cpu usage percentage
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double ServerCpuUsage {
@@ -3322,7 +3553,7 @@
     public const int SuccessfulRequestsPerSecondFieldNumber = 13;
     private double successfulRequestsPerSecond_;
     /// <summary>
-    ///  Number of requests that succeeded/failed
+    /// Number of requests that succeeded/failed
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double SuccessfulRequestsPerSecond {
@@ -3626,7 +3857,7 @@
   }
 
   /// <summary>
-  ///  Results of a single benchmark scenario.
+  /// Results of a single benchmark scenario.
   /// </summary>
   public sealed partial class ScenarioResult : pb::IMessage<ScenarioResult> {
     private static readonly pb::MessageParser<ScenarioResult> _parser = new pb::MessageParser<ScenarioResult>(() => new ScenarioResult());
@@ -3635,7 +3866,7 @@
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[17]; }
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[18]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
@@ -3672,7 +3903,7 @@
     public const int ScenarioFieldNumber = 1;
     private global::Grpc.Testing.Scenario scenario_;
     /// <summary>
-    ///  Inputs used to run the scenario.
+    /// Inputs used to run the scenario.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.Scenario Scenario {
@@ -3686,7 +3917,7 @@
     public const int LatenciesFieldNumber = 2;
     private global::Grpc.Testing.HistogramData latencies_;
     /// <summary>
-    ///  Histograms from all clients merged into one histogram.
+    /// Histograms from all clients merged into one histogram.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.HistogramData Latencies {
@@ -3702,7 +3933,7 @@
         = pb::FieldCodec.ForMessage(26, global::Grpc.Testing.ClientStats.Parser);
     private readonly pbc::RepeatedField<global::Grpc.Testing.ClientStats> clientStats_ = new pbc::RepeatedField<global::Grpc.Testing.ClientStats>();
     /// <summary>
-    ///  Client stats for each client
+    /// Client stats for each client
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public pbc::RepeatedField<global::Grpc.Testing.ClientStats> ClientStats {
@@ -3715,7 +3946,7 @@
         = pb::FieldCodec.ForMessage(34, global::Grpc.Testing.ServerStats.Parser);
     private readonly pbc::RepeatedField<global::Grpc.Testing.ServerStats> serverStats_ = new pbc::RepeatedField<global::Grpc.Testing.ServerStats>();
     /// <summary>
-    ///  Server stats for each server
+    /// Server stats for each server
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public pbc::RepeatedField<global::Grpc.Testing.ServerStats> ServerStats {
@@ -3728,7 +3959,7 @@
         = pb::FieldCodec.ForInt32(42);
     private readonly pbc::RepeatedField<int> serverCores_ = new pbc::RepeatedField<int>();
     /// <summary>
-    ///  Number of cores available to each server
+    /// Number of cores available to each server
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public pbc::RepeatedField<int> ServerCores {
@@ -3739,7 +3970,7 @@
     public const int SummaryFieldNumber = 6;
     private global::Grpc.Testing.ScenarioResultSummary summary_;
     /// <summary>
-    ///  An after-the-fact computed summary
+    /// An after-the-fact computed summary
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.ScenarioResultSummary Summary {
@@ -3755,7 +3986,7 @@
         = pb::FieldCodec.ForBool(58);
     private readonly pbc::RepeatedField<bool> clientSuccess_ = new pbc::RepeatedField<bool>();
     /// <summary>
-    ///  Information on success or failure of each worker
+    /// Information on success or failure of each worker
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public pbc::RepeatedField<bool> ClientSuccess {
@@ -3778,7 +4009,7 @@
         = pb::FieldCodec.ForMessage(74, global::Grpc.Testing.RequestResultCount.Parser);
     private readonly pbc::RepeatedField<global::Grpc.Testing.RequestResultCount> requestResults_ = new pbc::RepeatedField<global::Grpc.Testing.RequestResultCount>();
     /// <summary>
-    ///  Number of failed requests (one row per status code seen)
+    /// Number of failed requests (one row per status code seen)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public pbc::RepeatedField<global::Grpc.Testing.RequestResultCount> RequestResults {
diff --git a/src/csharp/Grpc.IntegrationTesting/Empty.cs b/src/csharp/Grpc.IntegrationTesting/Empty.cs
index 3017e66..24ffd61 100644
--- a/src/csharp/Grpc.IntegrationTesting/Empty.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Empty.cs
@@ -35,13 +35,13 @@
   }
   #region Messages
   /// <summary>
-  ///  An empty message that you can re-use to avoid defining duplicated empty
-  ///  messages in your project. A typical example is to use it as argument or the
-  ///  return value of a service API. For instance:
+  /// An empty message that you can re-use to avoid defining duplicated empty
+  /// messages in your project. A typical example is to use it as argument or the
+  /// return value of a service API. For instance:
   ///
-  ///    service Foo {
-  ///      rpc Bar (grpc.testing.Empty) returns (grpc.testing.Empty) { };
-  ///    };
+  ///   service Foo {
+  ///     rpc Bar (grpc.testing.Empty) returns (grpc.testing.Empty) { };
+  ///   };
   /// </summary>
   public sealed partial class Empty : pb::IMessage<Empty> {
     private static readonly pb::MessageParser<Empty> _parser = new pb::MessageParser<Empty>(() => new Empty());
diff --git a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
index f7abcf8..38b9a5d 100644
--- a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
+++ b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
@@ -33,54 +33,48 @@
     <Reference Include="System.Net" />
     <Reference Include="System.Net.Http" />
     <Reference Include="System.Net.Http.WebRequest" />
-    <Reference Include="BouncyCastle.Crypto">
-      <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
-    </Reference>
-    <Reference Include="Newtonsoft.Json">
-      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
-    </Reference>
-    <Reference Include="nunit.framework">
-      <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
-    </Reference>
-    <Reference Include="nunitlite">
-      <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
-    </Reference>
-    <Reference Include="CommandLineParser.Unofficial">
-      <HintPath>..\packages\CommandLineParser.Unofficial.2.0.275\lib\net45\CommandLineParser.Unofficial.dll</HintPath>
-    </Reference>
-    <Reference Include="log4net">
-      <HintPath>..\packages\log4net.2.0.3\lib\net40-full\log4net.dll</HintPath>
-    </Reference>
-    <Reference Include="Google.Apis.Core">
-      <HintPath>..\packages\Google.Apis.Core.1.16.0\lib\net45\Google.Apis.Core.dll</HintPath>
-    </Reference>
     <Reference Include="Zlib.Portable">
       <HintPath>..\packages\Zlib.Portable.Signed.1.11.0\lib\portable-net4+sl5+wp8+win8+wpa81+MonoTouch+MonoAndroid\Zlib.Portable.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis">
-      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.dll</HintPath>
-    </Reference>
-    <Reference Include="Google.Apis.PlatformServices">
-      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.PlatformServices.dll</HintPath>
-    </Reference>
-    <Reference Include="Google.Apis.Auth">
-      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.dll</HintPath>
-    </Reference>
-    <Reference Include="Google.Apis.Auth.PlatformServices">
-      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
-    </Reference>
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
-    </Reference>
-    <Reference Include="Castle.Core">
-      <HintPath>..\packages\Castle.Core.3.3.3\lib\net45\Castle.Core.dll</HintPath>
-    </Reference>
-    <Reference Include="Moq">
-      <HintPath>..\packages\Moq.4.6.38-alpha\lib\net45\Moq.dll</HintPath>
-    </Reference>
     <Reference Include="System.Interactive.Async">
       <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
+    <Reference Include="Google.Apis.Core">
+      <HintPath>..\packages\Google.Apis.Core.1.21.0\lib\net45\Google.Apis.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis">
+      <HintPath>..\packages\Google.Apis.1.21.0\lib\net45\Google.Apis.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.PlatformServices">
+      <HintPath>..\packages\Google.Apis.1.21.0\lib\net45\Google.Apis.PlatformServices.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Auth">
+      <HintPath>..\packages\Google.Apis.Auth.1.21.0\lib\net45\Google.Apis.Auth.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Auth.PlatformServices">
+      <HintPath>..\packages\Google.Apis.Auth.1.21.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.2.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
+    <Reference Include="nunit.framework">
+      <HintPath>..\packages\NUnit.3.6.0\lib\net45\nunit.framework.dll</HintPath>
+    </Reference>
+    <Reference Include="nunitlite">
+      <HintPath>..\packages\NUnitLite.3.6.0\lib\net45\nunitlite.dll</HintPath>
+    </Reference>
+    <Reference Include="Newtonsoft.Json">
+      <HintPath>..\packages\Newtonsoft.Json.9.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+    </Reference>
+    <Reference Include="Castle.Core">
+      <HintPath>..\packages\Castle.Core.4.0.0\lib\net45\Castle.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Moq">
+      <HintPath>..\packages\Moq.4.7.0\lib\net45\Moq.dll</HintPath>
+    </Reference>
+    <Reference Include="CommandLine">
+      <HintPath>..\packages\CommandLineParser.2.1.1-beta\lib\net45\CommandLine.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.IntegrationTesting/Messages.cs b/src/csharp/Grpc.IntegrationTesting/Messages.cs
index 369fe73..278ef66 100644
--- a/src/csharp/Grpc.IntegrationTesting/Messages.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Messages.cs
@@ -75,12 +75,12 @@
   }
   #region Enums
   /// <summary>
-  ///  DEPRECATED, don't use. To be removed shortly.
-  ///  The type of payload that should be returned.
+  /// DEPRECATED, don't use. To be removed shortly.
+  /// The type of payload that should be returned.
   /// </summary>
   public enum PayloadType {
     /// <summary>
-    ///  Compressable text format.
+    /// Compressable text format.
     /// </summary>
     [pbr::OriginalName("COMPRESSABLE")] Compressable = 0,
   }
@@ -89,9 +89,9 @@
 
   #region Messages
   /// <summary>
-  ///  TODO(dgq): Go back to using well-known types once
-  ///  https://github.com/grpc/grpc/issues/6980 has been fixed.
-  ///  import "google/protobuf/wrappers.proto";
+  /// TODO(dgq): Go back to using well-known types once
+  /// https://github.com/grpc/grpc/issues/6980 has been fixed.
+  /// import "google/protobuf/wrappers.proto";
   /// </summary>
   public sealed partial class BoolValue : pb::IMessage<BoolValue> {
     private static readonly pb::MessageParser<BoolValue> _parser = new pb::MessageParser<BoolValue>(() => new BoolValue());
@@ -129,7 +129,7 @@
     public const int ValueFieldNumber = 1;
     private bool value_;
     /// <summary>
-    ///  The bool value.
+    /// The bool value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public bool Value {
@@ -214,7 +214,7 @@
   }
 
   /// <summary>
-  ///  A block of data, to simply increase gRPC message size.
+  /// A block of data, to simply increase gRPC message size.
   /// </summary>
   public sealed partial class Payload : pb::IMessage<Payload> {
     private static readonly pb::MessageParser<Payload> _parser = new pb::MessageParser<Payload>(() => new Payload());
@@ -253,8 +253,8 @@
     public const int TypeFieldNumber = 1;
     private global::Grpc.Testing.PayloadType type_ = 0;
     /// <summary>
-    ///  DEPRECATED, don't use. To be removed shortly.
-    ///  The type of data in body.
+    /// DEPRECATED, don't use. To be removed shortly.
+    /// The type of data in body.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.PayloadType Type {
@@ -268,7 +268,7 @@
     public const int BodyFieldNumber = 2;
     private pb::ByteString body_ = pb::ByteString.Empty;
     /// <summary>
-    ///  Primary contents of payload.
+    /// Primary contents of payload.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public pb::ByteString Body {
@@ -369,8 +369,8 @@
   }
 
   /// <summary>
-  ///  A protobuf representation for grpc status. This is used by test
-  ///  clients to specify a status that the server should attempt to return.
+  /// A protobuf representation for grpc status. This is used by test
+  /// clients to specify a status that the server should attempt to return.
   /// </summary>
   public sealed partial class EchoStatus : pb::IMessage<EchoStatus> {
     private static readonly pb::MessageParser<EchoStatus> _parser = new pb::MessageParser<EchoStatus>(() => new EchoStatus());
@@ -518,7 +518,7 @@
   }
 
   /// <summary>
-  ///  Unary request.
+  /// Unary request.
   /// </summary>
   public sealed partial class SimpleRequest : pb::IMessage<SimpleRequest> {
     private static readonly pb::MessageParser<SimpleRequest> _parser = new pb::MessageParser<SimpleRequest>(() => new SimpleRequest());
@@ -563,9 +563,9 @@
     public const int ResponseTypeFieldNumber = 1;
     private global::Grpc.Testing.PayloadType responseType_ = 0;
     /// <summary>
-    ///  DEPRECATED, don't use. To be removed shortly.
-    ///  Desired payload type in the response from the server.
-    ///  If response_type is RANDOM, server randomly chooses one from other formats.
+    /// DEPRECATED, don't use. To be removed shortly.
+    /// Desired payload type in the response from the server.
+    /// If response_type is RANDOM, server randomly chooses one from other formats.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.PayloadType ResponseType {
@@ -579,7 +579,7 @@
     public const int ResponseSizeFieldNumber = 2;
     private int responseSize_;
     /// <summary>
-    ///  Desired payload size in the response from the server.
+    /// Desired payload size in the response from the server.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int ResponseSize {
@@ -593,7 +593,7 @@
     public const int PayloadFieldNumber = 3;
     private global::Grpc.Testing.Payload payload_;
     /// <summary>
-    ///  Optional input payload sent along with the request.
+    /// Optional input payload sent along with the request.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.Payload Payload {
@@ -607,7 +607,7 @@
     public const int FillUsernameFieldNumber = 4;
     private bool fillUsername_;
     /// <summary>
-    ///  Whether SimpleResponse should include username.
+    /// Whether SimpleResponse should include username.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public bool FillUsername {
@@ -621,7 +621,7 @@
     public const int FillOauthScopeFieldNumber = 5;
     private bool fillOauthScope_;
     /// <summary>
-    ///  Whether SimpleResponse should include OAuth scope.
+    /// Whether SimpleResponse should include OAuth scope.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public bool FillOauthScope {
@@ -635,10 +635,10 @@
     public const int ResponseCompressedFieldNumber = 6;
     private global::Grpc.Testing.BoolValue responseCompressed_;
     /// <summary>
-    ///  Whether to request the server to compress the response. This field is
-    ///  "nullable" in order to interoperate seamlessly with clients not able to
-    ///  implement the full compression tests by introspecting the call to verify
-    ///  the response's compression status.
+    /// Whether to request the server to compress the response. This field is
+    /// "nullable" in order to interoperate seamlessly with clients not able to
+    /// implement the full compression tests by introspecting the call to verify
+    /// the response's compression status.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.BoolValue ResponseCompressed {
@@ -652,7 +652,7 @@
     public const int ResponseStatusFieldNumber = 7;
     private global::Grpc.Testing.EchoStatus responseStatus_;
     /// <summary>
-    ///  Whether server should return a given status
+    /// Whether server should return a given status
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.EchoStatus ResponseStatus {
@@ -666,7 +666,7 @@
     public const int ExpectCompressedFieldNumber = 8;
     private global::Grpc.Testing.BoolValue expectCompressed_;
     /// <summary>
-    ///  Whether the server should expect this request to be compressed.
+    /// Whether the server should expect this request to be compressed.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.BoolValue ExpectCompressed {
@@ -887,7 +887,7 @@
   }
 
   /// <summary>
-  ///  Unary response, as configured by the request.
+  /// Unary response, as configured by the request.
   /// </summary>
   public sealed partial class SimpleResponse : pb::IMessage<SimpleResponse> {
     private static readonly pb::MessageParser<SimpleResponse> _parser = new pb::MessageParser<SimpleResponse>(() => new SimpleResponse());
@@ -927,7 +927,7 @@
     public const int PayloadFieldNumber = 1;
     private global::Grpc.Testing.Payload payload_;
     /// <summary>
-    ///  Payload to increase message size.
+    /// Payload to increase message size.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.Payload Payload {
@@ -941,8 +941,8 @@
     public const int UsernameFieldNumber = 2;
     private string username_ = "";
     /// <summary>
-    ///  The user the request came from, for verifying authentication was
-    ///  successful when the client expected it.
+    /// The user the request came from, for verifying authentication was
+    /// successful when the client expected it.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public string Username {
@@ -956,7 +956,7 @@
     public const int OauthScopeFieldNumber = 3;
     private string oauthScope_ = "";
     /// <summary>
-    ///  OAuth scope.
+    /// OAuth scope.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public string OauthScope {
@@ -1079,7 +1079,7 @@
   }
 
   /// <summary>
-  ///  Client-streaming request.
+  /// Client-streaming request.
   /// </summary>
   public sealed partial class StreamingInputCallRequest : pb::IMessage<StreamingInputCallRequest> {
     private static readonly pb::MessageParser<StreamingInputCallRequest> _parser = new pb::MessageParser<StreamingInputCallRequest>(() => new StreamingInputCallRequest());
@@ -1118,7 +1118,7 @@
     public const int PayloadFieldNumber = 1;
     private global::Grpc.Testing.Payload payload_;
     /// <summary>
-    ///  Optional input payload sent along with the request.
+    /// Optional input payload sent along with the request.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.Payload Payload {
@@ -1132,10 +1132,10 @@
     public const int ExpectCompressedFieldNumber = 2;
     private global::Grpc.Testing.BoolValue expectCompressed_;
     /// <summary>
-    ///  Whether the server should expect this request to be compressed. This field
-    ///  is "nullable" in order to interoperate seamlessly with servers not able to
-    ///  implement the full compression tests by introspecting the call to verify
-    ///  the request's compression status.
+    /// Whether the server should expect this request to be compressed. This field
+    /// is "nullable" in order to interoperate seamlessly with servers not able to
+    /// implement the full compression tests by introspecting the call to verify
+    /// the request's compression status.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.BoolValue ExpectCompressed {
@@ -1248,7 +1248,7 @@
   }
 
   /// <summary>
-  ///  Client-streaming response.
+  /// Client-streaming response.
   /// </summary>
   public sealed partial class StreamingInputCallResponse : pb::IMessage<StreamingInputCallResponse> {
     private static readonly pb::MessageParser<StreamingInputCallResponse> _parser = new pb::MessageParser<StreamingInputCallResponse>(() => new StreamingInputCallResponse());
@@ -1286,7 +1286,7 @@
     public const int AggregatedPayloadSizeFieldNumber = 1;
     private int aggregatedPayloadSize_;
     /// <summary>
-    ///  Aggregated size of payloads received from the client.
+    /// Aggregated size of payloads received from the client.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int AggregatedPayloadSize {
@@ -1371,7 +1371,7 @@
   }
 
   /// <summary>
-  ///  Configuration for a particular response.
+  /// Configuration for a particular response.
   /// </summary>
   public sealed partial class ResponseParameters : pb::IMessage<ResponseParameters> {
     private static readonly pb::MessageParser<ResponseParameters> _parser = new pb::MessageParser<ResponseParameters>(() => new ResponseParameters());
@@ -1411,7 +1411,7 @@
     public const int SizeFieldNumber = 1;
     private int size_;
     /// <summary>
-    ///  Desired payload sizes in responses from the server.
+    /// Desired payload sizes in responses from the server.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int Size {
@@ -1425,8 +1425,8 @@
     public const int IntervalUsFieldNumber = 2;
     private int intervalUs_;
     /// <summary>
-    ///  Desired interval between consecutive responses in the response stream in
-    ///  microseconds.
+    /// Desired interval between consecutive responses in the response stream in
+    /// microseconds.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int IntervalUs {
@@ -1440,10 +1440,10 @@
     public const int CompressedFieldNumber = 3;
     private global::Grpc.Testing.BoolValue compressed_;
     /// <summary>
-    ///  Whether to request the server to compress the response. This field is
-    ///  "nullable" in order to interoperate seamlessly with clients not able to
-    ///  implement the full compression tests by introspecting the call to verify
-    ///  the response's compression status.
+    /// Whether to request the server to compress the response. This field is
+    /// "nullable" in order to interoperate seamlessly with clients not able to
+    /// implement the full compression tests by introspecting the call to verify
+    /// the response's compression status.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.BoolValue Compressed {
@@ -1566,7 +1566,7 @@
   }
 
   /// <summary>
-  ///  Server-streaming request.
+  /// Server-streaming request.
   /// </summary>
   public sealed partial class StreamingOutputCallRequest : pb::IMessage<StreamingOutputCallRequest> {
     private static readonly pb::MessageParser<StreamingOutputCallRequest> _parser = new pb::MessageParser<StreamingOutputCallRequest>(() => new StreamingOutputCallRequest());
@@ -1607,11 +1607,11 @@
     public const int ResponseTypeFieldNumber = 1;
     private global::Grpc.Testing.PayloadType responseType_ = 0;
     /// <summary>
-    ///  DEPRECATED, don't use. To be removed shortly.
-    ///  Desired payload type in the response from the server.
-    ///  If response_type is RANDOM, the payload from each response in the stream
-    ///  might be of different types. This is to simulate a mixed type of payload
-    ///  stream.
+    /// DEPRECATED, don't use. To be removed shortly.
+    /// Desired payload type in the response from the server.
+    /// If response_type is RANDOM, the payload from each response in the stream
+    /// might be of different types. This is to simulate a mixed type of payload
+    /// stream.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.PayloadType ResponseType {
@@ -1627,7 +1627,7 @@
         = pb::FieldCodec.ForMessage(18, global::Grpc.Testing.ResponseParameters.Parser);
     private readonly pbc::RepeatedField<global::Grpc.Testing.ResponseParameters> responseParameters_ = new pbc::RepeatedField<global::Grpc.Testing.ResponseParameters>();
     /// <summary>
-    ///  Configuration for each expected response message.
+    /// Configuration for each expected response message.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public pbc::RepeatedField<global::Grpc.Testing.ResponseParameters> ResponseParameters {
@@ -1638,7 +1638,7 @@
     public const int PayloadFieldNumber = 3;
     private global::Grpc.Testing.Payload payload_;
     /// <summary>
-    ///  Optional input payload sent along with the request.
+    /// Optional input payload sent along with the request.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.Payload Payload {
@@ -1652,7 +1652,7 @@
     public const int ResponseStatusFieldNumber = 7;
     private global::Grpc.Testing.EchoStatus responseStatus_;
     /// <summary>
-    ///  Whether server should return a given status
+    /// Whether server should return a given status
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.EchoStatus ResponseStatus {
@@ -1790,7 +1790,7 @@
   }
 
   /// <summary>
-  ///  Server-streaming response, as configured by the request and parameters.
+  /// Server-streaming response, as configured by the request and parameters.
   /// </summary>
   public sealed partial class StreamingOutputCallResponse : pb::IMessage<StreamingOutputCallResponse> {
     private static readonly pb::MessageParser<StreamingOutputCallResponse> _parser = new pb::MessageParser<StreamingOutputCallResponse>(() => new StreamingOutputCallResponse());
@@ -1828,7 +1828,7 @@
     public const int PayloadFieldNumber = 1;
     private global::Grpc.Testing.Payload payload_;
     /// <summary>
-    ///  Payload to increase response size.
+    /// Payload to increase response size.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.Payload Payload {
@@ -1919,8 +1919,8 @@
   }
 
   /// <summary>
-  ///  For reconnect interop test only.
-  ///  Client tells server what reconnection parameters it used.
+  /// For reconnect interop test only.
+  /// Client tells server what reconnection parameters it used.
   /// </summary>
   public sealed partial class ReconnectParams : pb::IMessage<ReconnectParams> {
     private static readonly pb::MessageParser<ReconnectParams> _parser = new pb::MessageParser<ReconnectParams>(() => new ReconnectParams());
@@ -2040,9 +2040,9 @@
   }
 
   /// <summary>
-  ///  For reconnect interop test only.
-  ///  Server tells client whether its reconnects are following the spec and the
-  ///  reconnect backoffs it saw.
+  /// For reconnect interop test only.
+  /// Server tells client whether its reconnects are following the spec and the
+  /// reconnect backoffs it saw.
   /// </summary>
   public sealed partial class ReconnectInfo : pb::IMessage<ReconnectInfo> {
     private static readonly pb::MessageParser<ReconnectInfo> _parser = new pb::MessageParser<ReconnectInfo>(() => new ReconnectInfo());
diff --git a/src/csharp/Grpc.IntegrationTesting/Metrics.cs b/src/csharp/Grpc.IntegrationTesting/Metrics.cs
index 4de1847..84eb09a 100644
--- a/src/csharp/Grpc.IntegrationTesting/Metrics.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Metrics.cs
@@ -44,7 +44,7 @@
   }
   #region Messages
   /// <summary>
-  ///  Reponse message containing the gauge name and value
+  /// Reponse message containing the gauge name and value
   /// </summary>
   public sealed partial class GaugeResponse : pb::IMessage<GaugeResponse> {
     private static readonly pb::MessageParser<GaugeResponse> _parser = new pb::MessageParser<GaugeResponse>(() => new GaugeResponse());
@@ -282,7 +282,7 @@
   }
 
   /// <summary>
-  ///  Request message containing the gauge name
+  /// Request message containing the gauge name
   /// </summary>
   public sealed partial class GaugeRequest : pb::IMessage<GaugeRequest> {
     private static readonly pb::MessageParser<GaugeRequest> _parser = new pb::MessageParser<GaugeRequest>(() => new GaugeRequest());
diff --git a/src/csharp/Grpc.IntegrationTesting/Payloads.cs b/src/csharp/Grpc.IntegrationTesting/Payloads.cs
index 7aef35c..f918b95 100644
--- a/src/csharp/Grpc.IntegrationTesting/Payloads.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Payloads.cs
@@ -335,8 +335,8 @@
   }
 
   /// <summary>
-  ///  TODO (vpai): Fill this in once the details of complex, representative
-  ///               protos are decided
+  /// TODO (vpai): Fill this in once the details of complex, representative
+  ///              protos are decided
   /// </summary>
   public sealed partial class ComplexProtoParams : pb::IMessage<ComplexProtoParams> {
     private static readonly pb::MessageParser<ComplexProtoParams> _parser = new pb::MessageParser<ComplexProtoParams>(() => new ComplexProtoParams());
diff --git a/src/csharp/Grpc.IntegrationTesting/SslCredentialsTest.cs b/src/csharp/Grpc.IntegrationTesting/SslCredentialsTest.cs
index f85e272..377dad6 100644
--- a/src/csharp/Grpc.IntegrationTesting/SslCredentialsTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/SslCredentialsTest.cs
@@ -37,6 +37,7 @@
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
+using Google.Protobuf;
 using Grpc.Core;
 using Grpc.Core.Utils;
 using Grpc.Testing;
@@ -68,7 +69,7 @@
 
             server = new Server
             {
-                Services = { TestService.BindService(new TestServiceImpl()) },
+                Services = { TestService.BindService(new SslCredentialsTestServiceImpl()) },
                 Ports = { { Host, ServerPort.PickUnused, serverCredentials } }
             };
             server.Start();
@@ -95,5 +96,40 @@
             var response = client.UnaryCall(new SimpleRequest { ResponseSize = 10 });
             Assert.AreEqual(10, response.Payload.Body.Length);
         }
+
+        [Test]
+        public async Task AuthContextIsPopulated()
+        {
+            var call = client.StreamingInputCall();
+            await call.RequestStream.CompleteAsync();
+            var response = await call.ResponseAsync;
+            Assert.AreEqual(12345, response.AggregatedPayloadSize);
+        }
+
+        private class SslCredentialsTestServiceImpl : TestService.TestServiceBase
+        {
+            public override async Task<SimpleResponse> UnaryCall(SimpleRequest request, ServerCallContext context)
+            {
+                return new SimpleResponse { Payload = CreateZerosPayload(request.ResponseSize) };
+            }
+
+            public override async Task<StreamingInputCallResponse> StreamingInputCall(IAsyncStreamReader<StreamingInputCallRequest> requestStream, ServerCallContext context)
+            {
+                var authContext = context.AuthContext;
+                await requestStream.ForEachAsync(async request => {});
+
+                Assert.IsTrue(authContext.IsPeerAuthenticated);
+                Assert.AreEqual("x509_subject_alternative_name", authContext.PeerIdentityPropertyName);
+                Assert.IsTrue(authContext.PeerIdentity.Count() > 0);
+                Assert.AreEqual("ssl", authContext.FindPropertiesByName("transport_security_type").First().Value);
+
+                return new StreamingInputCallResponse { AggregatedPayloadSize = 12345 };
+            }
+
+            private static Payload CreateZerosPayload(int size)
+            {
+                return new Payload { Body = ByteString.CopyFrom(new byte[size]) };
+            }
+        }
     }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting/Stats.cs b/src/csharp/Grpc.IntegrationTesting/Stats.cs
index 504aa11..79ff220 100644
--- a/src/csharp/Grpc.IntegrationTesting/Stats.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Stats.cs
@@ -90,7 +90,7 @@
     public const int TimeElapsedFieldNumber = 1;
     private double timeElapsed_;
     /// <summary>
-    ///  wall clock time change in seconds since last reset
+    /// wall clock time change in seconds since last reset
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double TimeElapsed {
@@ -104,7 +104,7 @@
     public const int TimeUserFieldNumber = 2;
     private double timeUser_;
     /// <summary>
-    ///  change in user time (in seconds) used by the server since last reset
+    /// change in user time (in seconds) used by the server since last reset
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double TimeUser {
@@ -118,8 +118,8 @@
     public const int TimeSystemFieldNumber = 3;
     private double timeSystem_;
     /// <summary>
-    ///  change in server time (in seconds) used by the server process and all
-    ///  threads since last reset
+    /// change in server time (in seconds) used by the server process and all
+    /// threads since last reset
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double TimeSystem {
@@ -133,7 +133,7 @@
     public const int TotalCpuTimeFieldNumber = 4;
     private ulong totalCpuTime_;
     /// <summary>
-    ///  change in total cpu time of the server (data from proc/stat)
+    /// change in total cpu time of the server (data from proc/stat)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public ulong TotalCpuTime {
@@ -147,7 +147,7 @@
     public const int IdleCpuTimeFieldNumber = 5;
     private ulong idleCpuTime_;
     /// <summary>
-    ///  change in idle time of the server (data from proc/stat)
+    /// change in idle time of the server (data from proc/stat)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public ulong IdleCpuTime {
@@ -296,7 +296,7 @@
   }
 
   /// <summary>
-  ///  Histogram params based on grpc/support/histogram.c
+  /// Histogram params based on grpc/support/histogram.c
   /// </summary>
   public sealed partial class HistogramParams : pb::IMessage<HistogramParams> {
     private static readonly pb::MessageParser<HistogramParams> _parser = new pb::MessageParser<HistogramParams>(() => new HistogramParams());
@@ -335,7 +335,7 @@
     public const int ResolutionFieldNumber = 1;
     private double resolution_;
     /// <summary>
-    ///  first bucket is [0, 1 + resolution)
+    /// first bucket is [0, 1 + resolution)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double Resolution {
@@ -349,7 +349,7 @@
     public const int MaxPossibleFieldNumber = 2;
     private double maxPossible_;
     /// <summary>
-    ///  use enough buckets to allow this value
+    /// use enough buckets to allow this value
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double MaxPossible {
@@ -450,7 +450,7 @@
   }
 
   /// <summary>
-  ///  Histogram data based on grpc/support/histogram.c
+  /// Histogram data based on grpc/support/histogram.c
   /// </summary>
   public sealed partial class HistogramData : pb::IMessage<HistogramData> {
     private static readonly pb::MessageParser<HistogramData> _parser = new pb::MessageParser<HistogramData>(() => new HistogramData());
@@ -887,7 +887,7 @@
     public const int LatenciesFieldNumber = 1;
     private global::Grpc.Testing.HistogramData latencies_;
     /// <summary>
-    ///  Latency histogram. Data points are in nanoseconds.
+    /// Latency histogram. Data points are in nanoseconds.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Testing.HistogramData Latencies {
@@ -901,7 +901,7 @@
     public const int TimeElapsedFieldNumber = 2;
     private double timeElapsed_;
     /// <summary>
-    ///  See ServerStats for details.
+    /// See ServerStats for details.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public double TimeElapsed {
@@ -939,7 +939,7 @@
         = pb::FieldCodec.ForMessage(42, global::Grpc.Testing.RequestResultCount.Parser);
     private readonly pbc::RepeatedField<global::Grpc.Testing.RequestResultCount> requestResults_ = new pbc::RepeatedField<global::Grpc.Testing.RequestResultCount>();
     /// <summary>
-    ///  Number of failed requests (one row per status code seen)
+    /// Number of failed requests (one row per status code seen)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public pbc::RepeatedField<global::Grpc.Testing.RequestResultCount> RequestResults {
diff --git a/src/csharp/Grpc.IntegrationTesting/packages.config b/src/csharp/Grpc.IntegrationTesting/packages.config
index a03ee92..030f9d9 100644
--- a/src/csharp/Grpc.IntegrationTesting/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting/packages.config
@@ -1,17 +1,15 @@
 ﻿<?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Castle.Core" version="3.3.3" targetFramework="net45" />
-  <package id="CommandLineParser.Unofficial" version="2.0.275" targetFramework="net45" />
-  <package id="Google.Apis" version="1.16.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.16.0" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.16.0" targetFramework="net45" />
-  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
-  <package id="log4net" version="2.0.3" targetFramework="net45" />
-  <package id="Moq" version="4.6.38-alpha" targetFramework="net45" />
-  <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
-  <package id="NUnit" version="3.2.0" targetFramework="net45" />
-  <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
+  <package id="Castle.Core" version="4.0.0" targetFramework="net45" />
+  <package id="CommandLineParser" version="2.1.1-beta" targetFramework="net45" />
+  <package id="Google.Apis" version="1.21.0" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.21.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.21.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.2.0" targetFramework="net45" />
+  <package id="Moq" version="4.7.0" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net45" />
+  <package id="NUnit" version="3.6.0" targetFramework="net45" />
+  <package id="NUnitLite" version="3.6.0" targetFramework="net45" />
   <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
   <package id="Zlib.Portable.Signed" version="1.11.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index eba5431..40fc566 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -54,18 +54,15 @@
     "Grpc.Core": {
       "target": "project"
     },
-    "Google.Protobuf": "3.0.0",
-    "CommandLineParser.Unofficial": "2.0.275",
-    "Moq": "4.6.38-alpha",
-    "NUnit": "3.2.0",
-    "NUnitLite": "3.2.0-*"
+    "Google.Protobuf": "3.2.0",
+    "CommandLineParser": "2.1.1-beta",
+    "Moq": "4.7.0",
+    "NUnit": "3.6.0",
+    "NUnitLite": "3.6.0"
   },
   "frameworks": {
     "net45": {
-      "frameworkAssemblies": {
-        "System.Runtime": "",
-        "System.IO": ""
-      }
+      "frameworkAssemblies": {}
     },
     "netcoreapp1.0": {
       "imports": [
diff --git a/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.csproj b/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.csproj
index c5918b1..7e2b551 100644
--- a/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.csproj
+++ b/src/csharp/Grpc.Reflection.Tests/Grpc.Reflection.Tests.csproj
@@ -35,18 +35,18 @@
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
-    <Reference Include="nunit.framework">
-      <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
-    </Reference>
-    <Reference Include="nunitlite">
-      <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
-    </Reference>
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="System.Interactive.Async">
       <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.2.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
+    <Reference Include="nunit.framework">
+      <HintPath>..\packages\NUnit.3.6.0\lib\net45\nunit.framework.dll</HintPath>
+    </Reference>
+    <Reference Include="nunitlite">
+      <HintPath>..\packages\NUnitLite.3.6.0\lib\net45\nunitlite.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.Reflection.Tests/packages.config b/src/csharp/Grpc.Reflection.Tests/packages.config
index 0fed4db..8a7f7a0 100644
--- a/src/csharp/Grpc.Reflection.Tests/packages.config
+++ b/src/csharp/Grpc.Reflection.Tests/packages.config
@@ -1,7 +1,7 @@
 ﻿<?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
-  <package id="NUnit" version="3.2.0" targetFramework="net45" />
-  <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.2.0" targetFramework="net45" />
+  <package id="NUnit" version="3.6.0" targetFramework="net45" />
+  <package id="NUnitLite" version="3.6.0" targetFramework="net45" />
   <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Reflection.Tests/project.json b/src/csharp/Grpc.Reflection.Tests/project.json
index b90834a..fc05557 100644
--- a/src/csharp/Grpc.Reflection.Tests/project.json
+++ b/src/csharp/Grpc.Reflection.Tests/project.json
@@ -45,8 +45,8 @@
     "Grpc.Reflection": {
       "target": "project"
     },
-    "NUnit": "3.2.0",
-    "NUnitLite": "3.2.0-*"
+    "NUnit": "3.6.0",
+    "NUnitLite": "3.6.0"
   },
   "frameworks": {
     "net45": { },
diff --git a/src/csharp/Grpc.Reflection/Grpc.Reflection.csproj b/src/csharp/Grpc.Reflection/Grpc.Reflection.csproj
index 4e254a0..b0ab170 100644
--- a/src/csharp/Grpc.Reflection/Grpc.Reflection.csproj
+++ b/src/csharp/Grpc.Reflection/Grpc.Reflection.csproj
@@ -36,12 +36,12 @@
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="System.Interactive.Async">
       <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.2.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.Reflection/Reflection.cs b/src/csharp/Grpc.Reflection/Reflection.cs
index 06c5d08..86e9aac 100644
--- a/src/csharp/Grpc.Reflection/Reflection.cs
+++ b/src/csharp/Grpc.Reflection/Reflection.cs
@@ -70,7 +70,7 @@
   }
   #region Messages
   /// <summary>
-  ///  The message sent by the client when calling ServerReflectionInfo method.
+  /// The message sent by the client when calling ServerReflectionInfo method.
   /// </summary>
   public sealed partial class ServerReflectionRequest : pb::IMessage<ServerReflectionRequest> {
     private static readonly pb::MessageParser<ServerReflectionRequest> _parser = new pb::MessageParser<ServerReflectionRequest>(() => new ServerReflectionRequest());
@@ -136,7 +136,7 @@
     /// <summary>Field number for the "file_by_filename" field.</summary>
     public const int FileByFilenameFieldNumber = 3;
     /// <summary>
-    ///  Find a proto file by the file name.
+    /// Find a proto file by the file name.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public string FileByFilename {
@@ -150,9 +150,9 @@
     /// <summary>Field number for the "file_containing_symbol" field.</summary>
     public const int FileContainingSymbolFieldNumber = 4;
     /// <summary>
-    ///  Find the proto file that declares the given fully-qualified symbol name.
-    ///  This field should be a fully-qualified symbol name
-    ///  (e.g. &lt;package>.&lt;service>[.&lt;method>] or &lt;package>.&lt;type>).
+    /// Find the proto file that declares the given fully-qualified symbol name.
+    /// This field should be a fully-qualified symbol name
+    /// (e.g. &lt;package>.&lt;service>[.&lt;method>] or &lt;package>.&lt;type>).
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public string FileContainingSymbol {
@@ -166,8 +166,8 @@
     /// <summary>Field number for the "file_containing_extension" field.</summary>
     public const int FileContainingExtensionFieldNumber = 5;
     /// <summary>
-    ///  Find the proto file which defines an extension extending the given
-    ///  message type with the given field number.
+    /// Find the proto file which defines an extension extending the given
+    /// message type with the given field number.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Reflection.V1Alpha.ExtensionRequest FileContainingExtension {
@@ -181,14 +181,14 @@
     /// <summary>Field number for the "all_extension_numbers_of_type" field.</summary>
     public const int AllExtensionNumbersOfTypeFieldNumber = 6;
     /// <summary>
-    ///  Finds the tag numbers used by all known extensions of the given message
-    ///  type, and appends them to ExtensionNumberResponse in an undefined order.
-    ///  Its corresponding method is best-effort: it's not guaranteed that the
-    ///  reflection service will implement this method, and it's not guaranteed
-    ///  that this method will provide all extensions. Returns
-    ///  StatusCode::UNIMPLEMENTED if it's not implemented.
-    ///  This field should be a fully-qualified type name. The format is
-    ///  &lt;package>.&lt;type>
+    /// Finds the tag numbers used by all known extensions of the given message
+    /// type, and appends them to ExtensionNumberResponse in an undefined order.
+    /// Its corresponding method is best-effort: it's not guaranteed that the
+    /// reflection service will implement this method, and it's not guaranteed
+    /// that this method will provide all extensions. Returns
+    /// StatusCode::UNIMPLEMENTED if it's not implemented.
+    /// This field should be a fully-qualified type name. The format is
+    /// &lt;package>.&lt;type>
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public string AllExtensionNumbersOfType {
@@ -202,8 +202,8 @@
     /// <summary>Field number for the "list_services" field.</summary>
     public const int ListServicesFieldNumber = 7;
     /// <summary>
-    ///  List the full names of registered services. The content will not be
-    ///  checked.
+    /// List the full names of registered services. The content will not be
+    /// checked.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public string ListServices {
@@ -401,8 +401,8 @@
   }
 
   /// <summary>
-  ///  The type name and extension number sent by the client when requesting
-  ///  file_containing_extension.
+  /// The type name and extension number sent by the client when requesting
+  /// file_containing_extension.
   /// </summary>
   public sealed partial class ExtensionRequest : pb::IMessage<ExtensionRequest> {
     private static readonly pb::MessageParser<ExtensionRequest> _parser = new pb::MessageParser<ExtensionRequest>(() => new ExtensionRequest());
@@ -441,7 +441,7 @@
     public const int ContainingTypeFieldNumber = 1;
     private string containingType_ = "";
     /// <summary>
-    ///  Fully-qualified type name. The format should be &lt;package>.&lt;type>
+    /// Fully-qualified type name. The format should be &lt;package>.&lt;type>
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public string ContainingType {
@@ -553,7 +553,7 @@
   }
 
   /// <summary>
-  ///  The message sent by the server to answer ServerReflectionInfo method.
+  /// The message sent by the server to answer ServerReflectionInfo method.
   /// </summary>
   public sealed partial class ServerReflectionResponse : pb::IMessage<ServerReflectionResponse> {
     private static readonly pb::MessageParser<ServerReflectionResponse> _parser = new pb::MessageParser<ServerReflectionResponse>(() => new ServerReflectionResponse());
@@ -628,12 +628,12 @@
     /// <summary>Field number for the "file_descriptor_response" field.</summary>
     public const int FileDescriptorResponseFieldNumber = 4;
     /// <summary>
-    ///  This message is used to answer file_by_filename, file_containing_symbol,
-    ///  file_containing_extension requests with transitive dependencies. As
-    ///  the repeated label is not allowed in oneof fields, we use a
-    ///  FileDescriptorResponse message to encapsulate the repeated fields.
-    ///  The reflection service is allowed to avoid sending FileDescriptorProtos
-    ///  that were previously sent in response to earlier requests in the stream.
+    /// This message is used to answer file_by_filename, file_containing_symbol,
+    /// file_containing_extension requests with transitive dependencies. As
+    /// the repeated label is not allowed in oneof fields, we use a
+    /// FileDescriptorResponse message to encapsulate the repeated fields.
+    /// The reflection service is allowed to avoid sending FileDescriptorProtos
+    /// that were previously sent in response to earlier requests in the stream.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Reflection.V1Alpha.FileDescriptorResponse FileDescriptorResponse {
@@ -647,7 +647,7 @@
     /// <summary>Field number for the "all_extension_numbers_response" field.</summary>
     public const int AllExtensionNumbersResponseFieldNumber = 5;
     /// <summary>
-    ///  This message is used to answer all_extension_numbers_of_type requst.
+    /// This message is used to answer all_extension_numbers_of_type requst.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Reflection.V1Alpha.ExtensionNumberResponse AllExtensionNumbersResponse {
@@ -661,7 +661,7 @@
     /// <summary>Field number for the "list_services_response" field.</summary>
     public const int ListServicesResponseFieldNumber = 6;
     /// <summary>
-    ///  This message is used to answer list_services request.
+    /// This message is used to answer list_services request.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Reflection.V1Alpha.ListServiceResponse ListServicesResponse {
@@ -675,7 +675,7 @@
     /// <summary>Field number for the "error_response" field.</summary>
     public const int ErrorResponseFieldNumber = 7;
     /// <summary>
-    ///  This message is used when an error occurs.
+    /// This message is used when an error occurs.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public global::Grpc.Reflection.V1Alpha.ErrorResponse ErrorResponse {
@@ -893,9 +893,9 @@
   }
 
   /// <summary>
-  ///  Serialized FileDescriptorProto messages sent by the server answering
-  ///  a file_by_filename, file_containing_symbol, or file_containing_extension
-  ///  request.
+  /// Serialized FileDescriptorProto messages sent by the server answering
+  /// a file_by_filename, file_containing_symbol, or file_containing_extension
+  /// request.
   /// </summary>
   public sealed partial class FileDescriptorResponse : pb::IMessage<FileDescriptorResponse> {
     private static readonly pb::MessageParser<FileDescriptorResponse> _parser = new pb::MessageParser<FileDescriptorResponse>(() => new FileDescriptorResponse());
@@ -935,9 +935,9 @@
         = pb::FieldCodec.ForBytes(10);
     private readonly pbc::RepeatedField<pb::ByteString> fileDescriptorProto_ = new pbc::RepeatedField<pb::ByteString>();
     /// <summary>
-    ///  Serialized FileDescriptorProto messages. We avoid taking a dependency on
-    ///  descriptor.proto, which uses proto2 only features, by making them opaque
-    ///  bytes instead.
+    /// Serialized FileDescriptorProto messages. We avoid taking a dependency on
+    /// descriptor.proto, which uses proto2 only features, by making them opaque
+    /// bytes instead.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public pbc::RepeatedField<pb::ByteString> FileDescriptorProto {
@@ -1012,8 +1012,8 @@
   }
 
   /// <summary>
-  ///  A list of extension numbers sent by the server answering
-  ///  all_extension_numbers_of_type request.
+  /// A list of extension numbers sent by the server answering
+  /// all_extension_numbers_of_type request.
   /// </summary>
   public sealed partial class ExtensionNumberResponse : pb::IMessage<ExtensionNumberResponse> {
     private static readonly pb::MessageParser<ExtensionNumberResponse> _parser = new pb::MessageParser<ExtensionNumberResponse>(() => new ExtensionNumberResponse());
@@ -1052,8 +1052,8 @@
     public const int BaseTypeNameFieldNumber = 1;
     private string baseTypeName_ = "";
     /// <summary>
-    ///  Full name of the base type, including the package name. The format
-    ///  is &lt;package>.&lt;type>
+    /// Full name of the base type, including the package name. The format
+    /// is &lt;package>.&lt;type>
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public string BaseTypeName {
@@ -1158,7 +1158,7 @@
   }
 
   /// <summary>
-  ///  A list of ServiceResponse sent by the server answering list_services request.
+  /// A list of ServiceResponse sent by the server answering list_services request.
   /// </summary>
   public sealed partial class ListServiceResponse : pb::IMessage<ListServiceResponse> {
     private static readonly pb::MessageParser<ListServiceResponse> _parser = new pb::MessageParser<ListServiceResponse>(() => new ListServiceResponse());
@@ -1198,8 +1198,8 @@
         = pb::FieldCodec.ForMessage(10, global::Grpc.Reflection.V1Alpha.ServiceResponse.Parser);
     private readonly pbc::RepeatedField<global::Grpc.Reflection.V1Alpha.ServiceResponse> service_ = new pbc::RepeatedField<global::Grpc.Reflection.V1Alpha.ServiceResponse>();
     /// <summary>
-    ///  The information of each service may be expanded in the future, so we use
-    ///  ServiceResponse message to encapsulate it.
+    /// The information of each service may be expanded in the future, so we use
+    /// ServiceResponse message to encapsulate it.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public pbc::RepeatedField<global::Grpc.Reflection.V1Alpha.ServiceResponse> Service {
@@ -1274,8 +1274,8 @@
   }
 
   /// <summary>
-  ///  The information of a single service used by ListServiceResponse to answer
-  ///  list_services request.
+  /// The information of a single service used by ListServiceResponse to answer
+  /// list_services request.
   /// </summary>
   public sealed partial class ServiceResponse : pb::IMessage<ServiceResponse> {
     private static readonly pb::MessageParser<ServiceResponse> _parser = new pb::MessageParser<ServiceResponse>(() => new ServiceResponse());
@@ -1313,8 +1313,8 @@
     public const int NameFieldNumber = 1;
     private string name_ = "";
     /// <summary>
-    ///  Full name of a registered service, including its package name. The format
-    ///  is &lt;package>.&lt;service>
+    /// Full name of a registered service, including its package name. The format
+    /// is &lt;package>.&lt;service>
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public string Name {
@@ -1399,7 +1399,7 @@
   }
 
   /// <summary>
-  ///  The error code and error message sent by the server when an error occurs.
+  /// The error code and error message sent by the server when an error occurs.
   /// </summary>
   public sealed partial class ErrorResponse : pb::IMessage<ErrorResponse> {
     private static readonly pb::MessageParser<ErrorResponse> _parser = new pb::MessageParser<ErrorResponse>(() => new ErrorResponse());
@@ -1438,7 +1438,7 @@
     public const int ErrorCodeFieldNumber = 1;
     private int errorCode_;
     /// <summary>
-    ///  This field uses the error codes defined in grpc::StatusCode.
+    /// This field uses the error codes defined in grpc::StatusCode.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     public int ErrorCode {
diff --git a/src/csharp/Grpc.Reflection/packages.config b/src/csharp/Grpc.Reflection/packages.config
index 5ab40b7..eec292b 100644
--- a/src/csharp/Grpc.Reflection/packages.config
+++ b/src/csharp/Grpc.Reflection/packages.config
@@ -1,5 +1,5 @@
 ﻿<?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.2.0" targetFramework="net45" />
   <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Reflection/project.json b/src/csharp/Grpc.Reflection/project.json
index bfc5766..8bfe722 100644
--- a/src/csharp/Grpc.Reflection/project.json
+++ b/src/csharp/Grpc.Reflection/project.json
@@ -22,15 +22,10 @@
   },
   "dependencies": {
     "Grpc.Core": "1.2.0-dev",
-    "Google.Protobuf": "3.0.0"
+    "Google.Protobuf": "3.2.0"
   },
   "frameworks": {
-    "net45": {
-      "frameworkAssemblies": {
-        "System.Runtime": "",
-        "System.IO": ""
-      }
-    },
+    "net45": {},
     "netstandard1.5": {
       "dependencies": {
         "NETStandard.Library": "1.6.0"
diff --git a/src/csharp/ext/grpc_csharp_ext.c b/src/csharp/ext/grpc_csharp_ext.c
index 6a24119..491df4d 100644
--- a/src/csharp/ext/grpc_csharp_ext.c
+++ b/src/csharp/ext/grpc_csharp_ext.c
@@ -1023,6 +1023,31 @@
   return grpc_metadata_credentials_create_from_plugin(plugin, NULL);
 }
 
+/* Auth context */
+
+GPR_EXPORT grpc_auth_context *GPR_CALLTYPE grpcsharp_call_auth_context(grpc_call *call) {
+  return grpc_call_auth_context(call);
+}
+
+GPR_EXPORT const char *GPR_CALLTYPE grpcsharp_auth_context_peer_identity_property_name(
+    const grpc_auth_context *ctx) {
+  return grpc_auth_context_peer_identity_property_name(ctx);
+}
+
+GPR_EXPORT grpc_auth_property_iterator GPR_CALLTYPE
+grpcsharp_auth_context_property_iterator(const grpc_auth_context *ctx) {
+  return grpc_auth_context_property_iterator(ctx);
+}
+
+GPR_EXPORT const grpc_auth_property *GPR_CALLTYPE grpcsharp_auth_property_iterator_next(
+    grpc_auth_property_iterator *it) {
+  return grpc_auth_property_iterator_next(it);
+}
+
+GPR_EXPORT void GPR_CALLTYPE grpcsharp_auth_context_release(grpc_auth_context *ctx) {
+  grpc_auth_context_release(ctx);
+}
+
 /* Logging */
 
 typedef void(GPR_CALLTYPE *grpcsharp_log_func)(const char *file, int32_t line,
diff --git a/src/csharp/tests.json b/src/csharp/tests.json
index 4ce6769..707d140 100644
--- a/src/csharp/tests.json
+++ b/src/csharp/tests.json
@@ -8,6 +8,8 @@
     "Grpc.Core.Internal.Tests.MetadataArraySafeHandleTest",
     "Grpc.Core.Internal.Tests.TimespecTest",
     "Grpc.Core.Tests.AppDomainUnloadTest",
+    "Grpc.Core.Tests.AuthContextTest",
+    "Grpc.Core.Tests.AuthPropertyTest",
     "Grpc.Core.Tests.CallCredentialsTest",
     "Grpc.Core.Tests.CallOptionsTest",
     "Grpc.Core.Tests.ChannelCredentialsTest",
@@ -20,7 +22,6 @@
     "Grpc.Core.Tests.HalfcloseTest",
     "Grpc.Core.Tests.MarshallingErrorsTest",
     "Grpc.Core.Tests.MetadataTest",
-    "Grpc.Core.Tests.NUnitVersionTest",
     "Grpc.Core.Tests.PerformanceTest",
     "Grpc.Core.Tests.PInvokeTest",
     "Grpc.Core.Tests.ResponseHeadersTest",
diff --git a/src/python/grpcio_health_checking/setup.py b/src/python/grpcio_health_checking/setup.py
index 072c326..52ee98a 100644
--- a/src/python/grpcio_health_checking/setup.py
+++ b/src/python/grpcio_health_checking/setup.py
@@ -47,7 +47,7 @@
 SETUP_REQUIRES = (
     'grpcio-tools>={version}'.format(version=grpc_version.VERSION),)
 
-INSTALL_REQUIRES = ('protobuf>=3.0.0',
+INSTALL_REQUIRES = ('protobuf>=3.2.0',
                     'grpcio>={version}'.format(version=grpc_version.VERSION),)
 
 COMMAND_CLASS = {
diff --git a/src/python/grpcio_reflection/setup.py b/src/python/grpcio_reflection/setup.py
index 19aafe4..e85092d 100644
--- a/src/python/grpcio_reflection/setup.py
+++ b/src/python/grpcio_reflection/setup.py
@@ -47,7 +47,7 @@
 SETUP_REQUIRES = (
     'grpcio-tools>={version}'.format(version=grpc_version.VERSION),)
 
-INSTALL_REQUIRES = ('protobuf>=3.0.0',
+INSTALL_REQUIRES = ('protobuf>=3.2.0',
                     'grpcio>={version}'.format(version=grpc_version.VERSION),)
 
 COMMAND_CLASS = {
diff --git a/src/python/grpcio_tests/setup.py b/src/python/grpcio_tests/setup.py
index b0c73fc..b9f0264 100644
--- a/src/python/grpcio_tests/setup.py
+++ b/src/python/grpcio_tests/setup.py
@@ -56,7 +56,7 @@
     'grpcio>={version}'.format(version=grpc_version.VERSION),
     'grpcio-tools>={version}'.format(version=grpc_version.VERSION),
     'grpcio-health-checking>={version}'.format(version=grpc_version.VERSION),
-    'oauth2client>=1.4.7', 'protobuf>=3.0.0', 'six>=1.10',)
+    'oauth2client>=1.4.7', 'protobuf>=3.2.0', 'six>=1.10',)
 
 COMMAND_CLASS = {
     # Run `preprocess` *before* doing any packaging!
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index b379664..ecb6623 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -27,6 +27,7 @@
 # (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 'etc'
 require 'mkmf'
 
 LIBDIR = RbConfig::CONFIG['libdir']
@@ -80,7 +81,9 @@
 
 unless windows
   puts 'Building internal gRPC into ' + grpc_lib_dir
-  system("make -j -C #{grpc_root} #{grpc_lib_dir}/libgrpc.a CONFIG=#{grpc_config}")
+  nproc = 4
+  nproc = Etc.nprocessors * 2 if Etc.respond_to? :nprocessors
+  system("make -j#{nproc} -C #{grpc_root} #{grpc_lib_dir}/libgrpc.a CONFIG=#{grpc_config}")
   exit 1 unless $? == 0
 end
 
diff --git a/templates/binding.gyp.template b/templates/binding.gyp.template
index 2290411..5e401e8 100644
--- a/templates/binding.gyp.template
+++ b/templates/binding.gyp.template
@@ -45,7 +45,11 @@
       # 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'
+      'grpc_uv%': 'false',
+      # 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.
+      'grpc_alpn%': 'true'
     },
     'target_defaults': {
       'include_dirs': [
@@ -75,10 +79,16 @@
             'OPENSSL_NO_ASM'
           ]
         }, {
-          # As of the beginning of 2017, we only support versions of Node with
-          # embedded versions of OpenSSL that support ALPN
-          'defines': [
-            'TSI_OPENSSL_ALPN_SUPPORT=1'
+          'conditions': [
+            ['grpc_alpn=="true"', {
+              'defines': [
+                'TSI_OPENSSL_ALPN_SUPPORT=1'
+              ],
+            }, {
+              'defines': [
+                'TSI_OPENSSL_ALPN_SUPPORT=0'
+              ],
+            }]
           ],
           'include_dirs': [
             '<(node_root_dir)/deps/openssl/openssl/include',
diff --git a/templates/src/csharp/Grpc.Auth/project.json.template b/templates/src/csharp/Grpc.Auth/project.json.template
index 8bcac1a..aa233db 100644
--- a/templates/src/csharp/Grpc.Auth/project.json.template
+++ b/templates/src/csharp/Grpc.Auth/project.json.template
@@ -24,7 +24,7 @@
     },
     "dependencies": {
       "Grpc.Core": "${settings.csharp_version}",
-      "Google.Apis.Auth": "1.16.0"
+      "Google.Apis.Auth": "1.21.0"
     },
     "frameworks": {
       "net45": { },
diff --git a/templates/src/csharp/Grpc.Core.Tests/project.json.template b/templates/src/csharp/Grpc.Core.Tests/project.json.template
index 8a3e075..b5f8190 100644
--- a/templates/src/csharp/Grpc.Core.Tests/project.json.template
+++ b/templates/src/csharp/Grpc.Core.Tests/project.json.template
@@ -6,10 +6,10 @@
       "Grpc.Core": {
         "target": "project"
       },
-      "Newtonsoft.Json": "8.0.3",
-      "NUnit": "3.2.0",
-      "NUnitLite": "3.2.0-*",
-      "NUnit.ConsoleRunner": "3.2.0",
+      "Newtonsoft.Json": "9.0.1",
+      "NUnit": "3.6.0",
+      "NUnitLite": "3.6.0",
+      "NUnit.ConsoleRunner": "3.6.0",
       "OpenCover": "4.6.519",
       "ReportGenerator": "2.4.4.0"
     },
diff --git a/templates/src/csharp/Grpc.Examples.Tests/project.json.template b/templates/src/csharp/Grpc.Examples.Tests/project.json.template
index 0a9eb7c..da60c01 100644
--- a/templates/src/csharp/Grpc.Examples.Tests/project.json.template
+++ b/templates/src/csharp/Grpc.Examples.Tests/project.json.template
@@ -6,8 +6,8 @@
       "Grpc.Examples": {
         "target": "project"
       },
-      "NUnit": "3.2.0",
-      "NUnitLite": "3.2.0-*"
+      "NUnit": "3.6.0",
+      "NUnitLite": "3.6.0"
     },
     "frameworks": {
       "net45": { },
diff --git a/templates/src/csharp/Grpc.Examples/project.json.template b/templates/src/csharp/Grpc.Examples/project.json.template
index b8a8314..5de965c 100644
--- a/templates/src/csharp/Grpc.Examples/project.json.template
+++ b/templates/src/csharp/Grpc.Examples/project.json.template
@@ -6,15 +6,10 @@
       "Grpc.Core": {
         "target": "project"
       },
-      "Google.Protobuf": "3.0.0"
+      "Google.Protobuf": "3.2.0"
     },
     "frameworks": {
-      "net45": {
-        "frameworkAssemblies": {
-          "System.Runtime": "",
-          "System.IO": ""
-        }
-      },
+      "net45": {},
       "netcoreapp1.0": {
         "dependencies": {
           "Microsoft.NETCore.App": {
diff --git a/templates/src/csharp/Grpc.HealthCheck.Tests/project.json.template b/templates/src/csharp/Grpc.HealthCheck.Tests/project.json.template
index c63da96..4a99332 100644
--- a/templates/src/csharp/Grpc.HealthCheck.Tests/project.json.template
+++ b/templates/src/csharp/Grpc.HealthCheck.Tests/project.json.template
@@ -6,8 +6,8 @@
       "Grpc.HealthCheck": {
         "target": "project"
       },
-      "NUnit": "3.2.0",
-      "NUnitLite": "3.2.0-*"
+      "NUnit": "3.6.0",
+      "NUnitLite": "3.6.0"
     },
     "frameworks": {
       "net45": { },
diff --git a/templates/src/csharp/Grpc.HealthCheck/project.json.template b/templates/src/csharp/Grpc.HealthCheck/project.json.template
index cba6894..9cd0d83 100644
--- a/templates/src/csharp/Grpc.HealthCheck/project.json.template
+++ b/templates/src/csharp/Grpc.HealthCheck/project.json.template
@@ -24,15 +24,10 @@
     },
     "dependencies": {
       "Grpc.Core": "${settings.csharp_version}",
-      "Google.Protobuf": "3.0.0"
+      "Google.Protobuf": "3.2.0"
     },
     "frameworks": {
-      "net45": {
-        "frameworkAssemblies": {
-          "System.Runtime": "",
-          "System.IO": ""
-        }
-      },
+      "net45": {},
       "netstandard1.5": {
         "dependencies": {
           "NETStandard.Library": "1.6.0"
diff --git a/templates/src/csharp/Grpc.IntegrationTesting/project.json.template b/templates/src/csharp/Grpc.IntegrationTesting/project.json.template
index 3ce94e5..74b9281 100644
--- a/templates/src/csharp/Grpc.IntegrationTesting/project.json.template
+++ b/templates/src/csharp/Grpc.IntegrationTesting/project.json.template
@@ -9,18 +9,15 @@
       "Grpc.Core": {
         "target": "project"
       },
-      "Google.Protobuf": "3.0.0",
-      "CommandLineParser.Unofficial": "2.0.275",
-      "Moq": "4.6.38-alpha",
-      "NUnit": "3.2.0",
-      "NUnitLite": "3.2.0-*"
+      "Google.Protobuf": "3.2.0",
+      "CommandLineParser": "2.1.1-beta",
+      "Moq": "4.7.0",
+      "NUnit": "3.6.0",
+      "NUnitLite": "3.6.0"
     },
     "frameworks": {
       "net45": {
-        "frameworkAssemblies": {
-          "System.Runtime": "",
-          "System.IO": ""
-        }
+        "frameworkAssemblies": {}
       },
       "netcoreapp1.0": {
         "imports": [
diff --git a/templates/src/csharp/Grpc.Reflection.Tests/project.json.template b/templates/src/csharp/Grpc.Reflection.Tests/project.json.template
index 2869609..65d200e 100644
--- a/templates/src/csharp/Grpc.Reflection.Tests/project.json.template
+++ b/templates/src/csharp/Grpc.Reflection.Tests/project.json.template
@@ -6,8 +6,8 @@
       "Grpc.Reflection": {
         "target": "project"
       },
-      "NUnit": "3.2.0",
-      "NUnitLite": "3.2.0-*"
+      "NUnit": "3.6.0",
+      "NUnitLite": "3.6.0"
     },
     "frameworks": {
       "net45": { },
diff --git a/templates/src/csharp/Grpc.Reflection/project.json.template b/templates/src/csharp/Grpc.Reflection/project.json.template
index 8a33e1c..e6f65f8 100644
--- a/templates/src/csharp/Grpc.Reflection/project.json.template
+++ b/templates/src/csharp/Grpc.Reflection/project.json.template
@@ -24,15 +24,10 @@
     },
     "dependencies": {
       "Grpc.Core": "${settings.csharp_version}",
-      "Google.Protobuf": "3.0.0"
+      "Google.Protobuf": "3.2.0"
     },
     "frameworks": {
-      "net45": {
-        "frameworkAssemblies": {
-          "System.Runtime": "",
-          "System.IO": ""
-        }
-      },
+      "net45": {},
       "netstandard1.5": {
         "dependencies": {
           "NETStandard.Library": "1.6.0"
diff --git a/templates/tools/dockerfile/python_deps.include b/templates/tools/dockerfile/python_deps.include
index 26c91f4..2c12981 100644
--- a/templates/tools/dockerfile/python_deps.include
+++ b/templates/tools/dockerfile/python_deps.include
@@ -11,4 +11,4 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
diff --git a/templates/tools/dockerfile/test/bazel/Dockerfile.template b/templates/tools/dockerfile/test/bazel/Dockerfile.template
deleted file mode 100644
index 82f90be..0000000
--- a/templates/tools/dockerfile/test/bazel/Dockerfile.template
+++ /dev/null
@@ -1,48 +0,0 @@
-%YAML 1.2
---- |
-  # 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.
-  
-  FROM ubuntu:15.10
-  
-  <%include file="../../apt_get_basic.include"/>
-
-  #========================
-  # Bazel installation
-  RUN apt-get install -y software-properties-common g++
-  RUN echo "deb [arch=amd64] http://storage.googleapis.com/bazel-apt stable jdk1.8" > /etc/apt/sources.list.d/bazel.list
-  RUN curl https://bazel.build/bazel-release.pub.gpg | apt-key add -
-  RUN apt-get -y update
-  RUN apt-get -y install bazel
-
-  RUN mkdir -p /var/local/jenkins
-  
-  # Define the default command.
-  CMD ["bash"]
-  
diff --git a/test/core/client_channel/parse_address_test.c b/test/core/client_channel/parse_address_test.c
new file mode 100644
index 0000000..37dd0fb
--- /dev/null
+++ b/test/core/client_channel/parse_address_test.c
@@ -0,0 +1,116 @@
+/*
+ *
+ * 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/ext/client_channel/parse_address.h"
+#include "src/core/lib/iomgr/sockaddr.h"
+
+#include <string.h>
+#ifdef GRPC_HAVE_UNIX_SOCKET
+#include <sys/un.h>
+#endif
+
+#include <grpc/support/log.h>
+
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/socket_utils.h"
+#include "test/core/util/test_config.h"
+
+#ifdef GRPC_HAVE_UNIX_SOCKET
+
+static void test_parse_unix(const char *uri_text, const char *pathname) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_uri *uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+  grpc_resolved_address addr;
+
+  GPR_ASSERT(1 == parse_unix(uri, &addr));
+  struct sockaddr_un *addr_un = (struct sockaddr_un *)addr.addr;
+  GPR_ASSERT(AF_UNIX == addr_un->sun_family);
+  GPR_ASSERT(0 == strcmp(addr_un->sun_path, pathname));
+
+  grpc_uri_destroy(uri);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+#else /* GRPC_HAVE_UNIX_SOCKET */
+
+static void test_parse_unix(const char *uri_text, const char *pathname) {}
+
+#endif /* GRPC_HAVE_UNIX_SOCKET */
+
+static void test_parse_ipv4(const char *uri_text, const char *host,
+                            unsigned short port) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_uri *uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+  grpc_resolved_address addr;
+  char ntop_buf[INET_ADDRSTRLEN];
+
+  GPR_ASSERT(1 == parse_ipv4(uri, &addr));
+  struct sockaddr_in *addr_in = (struct sockaddr_in *)addr.addr;
+  GPR_ASSERT(AF_INET == addr_in->sin_family);
+  GPR_ASSERT(NULL != grpc_inet_ntop(AF_INET, &addr_in->sin_addr, ntop_buf,
+                                    sizeof(ntop_buf)));
+  GPR_ASSERT(0 == strcmp(ntop_buf, host));
+  GPR_ASSERT(ntohs(addr_in->sin_port) == port);
+
+  grpc_uri_destroy(uri);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+static void test_parse_ipv6(const char *uri_text, const char *host,
+                            unsigned short port, uint32_t scope_id) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_uri *uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+  grpc_resolved_address addr;
+  char ntop_buf[INET6_ADDRSTRLEN];
+
+  GPR_ASSERT(1 == parse_ipv6(uri, &addr));
+  struct sockaddr_in6 *addr_in6 = (struct sockaddr_in6 *)addr.addr;
+  GPR_ASSERT(AF_INET6 == addr_in6->sin6_family);
+  GPR_ASSERT(NULL != grpc_inet_ntop(AF_INET6, &addr_in6->sin6_addr, ntop_buf,
+                                    sizeof(ntop_buf)));
+  GPR_ASSERT(0 == strcmp(ntop_buf, host));
+  GPR_ASSERT(ntohs(addr_in6->sin6_port) == port);
+  GPR_ASSERT(addr_in6->sin6_scope_id == scope_id);
+
+  grpc_uri_destroy(uri);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+
+  test_parse_unix("unix:/path/name", "/path/name");
+  test_parse_ipv4("ipv4:192.0.2.1:12345", "192.0.2.1", 12345);
+  test_parse_ipv6("ipv6:[2001:db8::1]:12345", "2001:db8::1", 12345, 0);
+  test_parse_ipv6("ipv6:[2001:db8::1%252]:12345", "2001:db8::1", 12345, 2);
+}
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 3e34011..187757d 100644
--- a/test/core/client_channel/resolvers/dns_resolver_connectivity_test.c
+++ b/test/core/client_channel/resolvers/dns_resolver_connectivity_test.c
@@ -69,7 +69,7 @@
 static grpc_resolver *create_resolver(grpc_exec_ctx *exec_ctx,
                                       const char *name) {
   grpc_resolver_factory *factory = grpc_resolver_factory_lookup("dns");
-  grpc_uri *uri = grpc_uri_parse(name, 0);
+  grpc_uri *uri = grpc_uri_parse(exec_ctx, name, 0);
   GPR_ASSERT(uri);
   grpc_resolver_args args;
   memset(&args, 0, sizeof(args));
diff --git a/test/core/client_channel/resolvers/dns_resolver_test.c b/test/core/client_channel/resolvers/dns_resolver_test.c
index 9dd5aed..919a85d 100644
--- a/test/core/client_channel/resolvers/dns_resolver_test.c
+++ b/test/core/client_channel/resolvers/dns_resolver_test.c
@@ -43,7 +43,7 @@
 
 static void test_succeeds(grpc_resolver_factory *factory, const char *string) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri *uri = grpc_uri_parse(string, 0);
+  grpc_uri *uri = grpc_uri_parse(&exec_ctx, string, 0);
   grpc_resolver_args args;
   grpc_resolver *resolver;
   gpr_log(GPR_DEBUG, "test: '%s' should be valid for '%s'", string,
@@ -61,7 +61,7 @@
 
 static void test_fails(grpc_resolver_factory *factory, const char *string) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri *uri = grpc_uri_parse(string, 0);
+  grpc_uri *uri = grpc_uri_parse(&exec_ctx, string, 0);
   grpc_resolver_args args;
   grpc_resolver *resolver;
   gpr_log(GPR_DEBUG, "test: '%s' should be invalid for '%s'", string,
diff --git a/test/core/client_channel/resolvers/sockaddr_resolver_test.c b/test/core/client_channel/resolvers/sockaddr_resolver_test.c
index 68831ab..bc4f02c 100644
--- a/test/core/client_channel/resolvers/sockaddr_resolver_test.c
+++ b/test/core/client_channel/resolvers/sockaddr_resolver_test.c
@@ -57,7 +57,7 @@
 
 static void test_succeeds(grpc_resolver_factory *factory, const char *string) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri *uri = grpc_uri_parse(string, 0);
+  grpc_uri *uri = grpc_uri_parse(&exec_ctx, string, 0);
   grpc_resolver_args args;
   grpc_resolver *resolver;
   gpr_log(GPR_DEBUG, "test: '%s' should be valid for '%s'", string,
@@ -84,7 +84,7 @@
 
 static void test_fails(grpc_resolver_factory *factory, const char *string) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri *uri = grpc_uri_parse(string, 0);
+  grpc_uri *uri = grpc_uri_parse(&exec_ctx, string, 0);
   grpc_resolver_args args;
   grpc_resolver *resolver;
   gpr_log(GPR_DEBUG, "test: '%s' should be invalid for '%s'", string,
diff --git a/test/core/client_channel/uri_fuzzer_test.c b/test/core/client_channel/uri_fuzzer_test.c
index d2e3fb4..baadd4f 100644
--- a/test/core/client_channel/uri_fuzzer_test.c
+++ b/test/core/client_channel/uri_fuzzer_test.c
@@ -38,6 +38,7 @@
 #include <grpc/support/alloc.h>
 
 #include "src/core/ext/client_channel/uri_parser.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
 
 bool squelch = true;
 bool leak_check = true;
@@ -47,10 +48,12 @@
   memcpy(s, data, size);
   s[size] = 0;
 
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_uri *x;
-  if ((x = grpc_uri_parse(s, 1))) {
+  if ((x = grpc_uri_parse(&exec_ctx, s, 1))) {
     grpc_uri_destroy(x);
   }
+  grpc_exec_ctx_finish(&exec_ctx);
   gpr_free(s);
   return 0;
 }
diff --git a/test/core/client_channel/uri_parser_test.c b/test/core/client_channel/uri_parser_test.c
index 5f32d32..8a127f7 100644
--- a/test/core/client_channel/uri_parser_test.c
+++ b/test/core/client_channel/uri_parser_test.c
@@ -37,29 +37,35 @@
 
 #include <grpc/support/log.h>
 
+#include "src/core/lib/iomgr/exec_ctx.h"
 #include "test/core/util/test_config.h"
 
 static void test_succeeds(const char *uri_text, const char *scheme,
                           const char *authority, const char *path,
                           const char *query, const char *fragment) {
-  grpc_uri *uri = grpc_uri_parse(uri_text, 0);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_uri *uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
   GPR_ASSERT(uri);
   GPR_ASSERT(0 == strcmp(scheme, uri->scheme));
   GPR_ASSERT(0 == strcmp(authority, uri->authority));
   GPR_ASSERT(0 == strcmp(path, uri->path));
   GPR_ASSERT(0 == strcmp(query, uri->query));
   GPR_ASSERT(0 == strcmp(fragment, uri->fragment));
+  grpc_exec_ctx_finish(&exec_ctx);
   grpc_uri_destroy(uri);
 }
 
 static void test_fails(const char *uri_text) {
-  GPR_ASSERT(NULL == grpc_uri_parse(uri_text, 0));
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  GPR_ASSERT(NULL == grpc_uri_parse(&exec_ctx, uri_text, 0));
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_query_parts() {
   {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
     const char *uri_text = "http://foo/path?a&b=B&c=&#frag";
-    grpc_uri *uri = grpc_uri_parse(uri_text, 0);
+    grpc_uri *uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
     GPR_ASSERT(uri);
 
     GPR_ASSERT(0 == strcmp("http", uri->scheme));
@@ -86,12 +92,14 @@
     GPR_ASSERT(NULL == grpc_uri_get_query_arg(uri, ""));
 
     GPR_ASSERT(0 == strcmp("frag", uri->fragment));
+    grpc_exec_ctx_finish(&exec_ctx);
     grpc_uri_destroy(uri);
   }
   {
     /* test the current behavior of multiple query part values */
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
     const char *uri_text = "http://auth/path?foo=bar=baz&foobar==";
-    grpc_uri *uri = grpc_uri_parse(uri_text, 0);
+    grpc_uri *uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
     GPR_ASSERT(uri);
 
     GPR_ASSERT(0 == strcmp("http", uri->scheme));
@@ -103,12 +111,14 @@
     GPR_ASSERT(0 == strcmp("bar", grpc_uri_get_query_arg(uri, "foo")));
     GPR_ASSERT(0 == strcmp("", grpc_uri_get_query_arg(uri, "foobar")));
 
+    grpc_exec_ctx_finish(&exec_ctx);
     grpc_uri_destroy(uri);
   }
   {
     /* empty query */
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
     const char *uri_text = "http://foo/path";
-    grpc_uri *uri = grpc_uri_parse(uri_text, 0);
+    grpc_uri *uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
     GPR_ASSERT(uri);
 
     GPR_ASSERT(0 == strcmp("http", uri->scheme));
@@ -119,6 +129,7 @@
     GPR_ASSERT(NULL == uri->query_parts);
     GPR_ASSERT(NULL == uri->query_parts_values);
     GPR_ASSERT(0 == strcmp("", uri->fragment));
+    grpc_exec_ctx_finish(&exec_ctx);
     grpc_uri_destroy(uri);
   }
 }
@@ -142,6 +153,8 @@
   test_succeeds("http:?legit#twice", "http", "", "", "legit", "twice");
   test_succeeds("http://foo?bar#lol?", "http", "foo", "", "bar", "lol?");
   test_succeeds("http://foo?bar#lol?/", "http", "foo", "", "bar", "lol?/");
+  test_succeeds("ipv6:[2001:db8::1%252]:12345", "ipv6", "",
+                "[2001:db8::1%2]:12345", "", "");
 
   test_fails("xyz");
   test_fails("http:?dangling-pct-%0");
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/clusterfuzz-testcase-6520142139752448 b/test/core/end2end/fuzzers/api_fuzzer_corpus/clusterfuzz-testcase-6520142139752448
new file mode 100644
index 0000000..49c02c2
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/clusterfuzz-testcase-6520142139752448
Binary files differ
diff --git a/test/core/fling/fling_stream_test.c b/test/core/fling/fling_stream_test.c
index 7e4daaa..948659a 100644
--- a/test/core/fling/fling_stream_test.c
+++ b/test/core/fling/fling_stream_test.c
@@ -31,22 +31,13 @@
  *
  */
 
-#ifndef _POSIX_SOURCE
-#define _POSIX_SOURCE
-#endif
-
-#include <assert.h>
-#include <signal.h>
 #include <stdio.h>
-#include <stdlib.h>
 #include <string.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <unistd.h>
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/host_port.h>
 #include <grpc/support/string_util.h>
+#include <grpc/support/subprocess.h>
 #include "src/core/lib/support/string.h"
 #include "test/core/util/port.h"
 
@@ -57,10 +48,7 @@
   int port = grpc_pick_unused_port_or_die();
   char *args[10];
   int status;
-  pid_t svr, cli;
-  /* seed rng with pid, so we don't end up with the same random numbers as a
-     concurrently running test binary */
-  srand((unsigned)getpid());
+  gpr_subprocess *svr, *cli;
   /* figure out where we are */
   if (lslash) {
     memcpy(root, me, (size_t)(lslash - me));
@@ -69,45 +57,38 @@
     strcpy(root, ".");
   }
   /* start the server */
-  svr = fork();
-  if (svr == 0) {
-    gpr_asprintf(&args[0], "%s/fling_server", root);
-    args[1] = "--bind";
-    gpr_join_host_port(&args[2], "::", port);
-    args[3] = "--no-secure";
-    args[4] = 0;
-    execv(args[0], args);
+  gpr_asprintf(&args[0], "%s/fling_server%s", root,
+               gpr_subprocess_binary_extension());
+  args[1] = "--bind";
+  gpr_join_host_port(&args[2], "::", port);
+  args[3] = "--no-secure";
+  svr = gpr_subprocess_create(4, (const char **)args);
+  gpr_free(args[0]);
+  gpr_free(args[2]);
 
-    gpr_free(args[0]);
-    gpr_free(args[2]);
-    return 1;
-  }
-  /* wait a little */
-  sleep(2);
   /* start the client */
-  cli = fork();
-  if (cli == 0) {
-    gpr_asprintf(&args[0], "%s/fling_client", root);
-    args[1] = "--target";
-    gpr_join_host_port(&args[2], "127.0.0.1", port);
-    args[3] = "--scenario=ping-pong-stream";
-    args[4] = "--no-secure";
-    args[5] = 0;
-    execv(args[0], args);
+  gpr_asprintf(&args[0], "%s/fling_client%s", root,
+               gpr_subprocess_binary_extension());
+  args[1] = "--target";
+  gpr_join_host_port(&args[2], "127.0.0.1", port);
+  args[3] = "--scenario=ping-pong-stream";
+  args[4] = "--no-secure";
+  args[5] = 0;
+  cli = gpr_subprocess_create(6, (const char **)args);
+  gpr_free(args[0]);
+  gpr_free(args[2]);
 
-    gpr_free(args[0]);
-    gpr_free(args[2]);
-    return 1;
-  }
   /* wait for completion */
   printf("waiting for client\n");
-  if (waitpid(cli, &status, 0) == -1) return 2;
-  if (!WIFEXITED(status)) return 4;
-  if (WEXITSTATUS(status)) return WEXITSTATUS(status);
-  printf("waiting for server\n");
-  kill(svr, SIGINT);
-  if (waitpid(svr, &status, 0) == -1) return 2;
-  if (!WIFEXITED(status)) return 4;
-  if (WEXITSTATUS(status)) return WEXITSTATUS(status);
-  return 0;
+  if ((status = gpr_subprocess_join(cli))) {
+    gpr_subprocess_destroy(cli);
+    gpr_subprocess_destroy(svr);
+    return status;
+  }
+  gpr_subprocess_destroy(cli);
+
+  gpr_subprocess_interrupt(svr);
+  status = gpr_subprocess_join(svr);
+  gpr_subprocess_destroy(svr);
+  return status;
 }
diff --git a/test/core/iomgr/sockaddr_utils_test.c b/test/core/iomgr/sockaddr_utils_test.c
index 8569c69..70a6c32 100644
--- a/test/core/iomgr/sockaddr_utils_test.c
+++ b/test/core/iomgr/sockaddr_utils_test.c
@@ -70,6 +70,12 @@
   return resolved_addr6;
 }
 
+static void set_addr6_scope_id(grpc_resolved_address *addr, uint32_t scope_id) {
+  struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr->addr;
+  GPR_ASSERT(addr6->sin6_family == AF_INET6);
+  addr6->sin6_scope_id = scope_id;
+}
+
 static const uint8_t kMapped[] = {0, 0, 0,    0,    0,   0, 0, 0,
                                   0, 0, 0xff, 0xff, 192, 0, 2, 1};
 
@@ -222,6 +228,16 @@
   expect_sockaddr_str("[2001:db8::1]:12345", &input6, 1);
   expect_sockaddr_uri("ipv6:[2001:db8::1]:12345", &input6);
 
+  set_addr6_scope_id(&input6, 2);
+  expect_sockaddr_str("[2001:db8::1%252]:12345", &input6, 0);
+  expect_sockaddr_str("[2001:db8::1%252]:12345", &input6, 1);
+  expect_sockaddr_uri("ipv6:[2001:db8::1%252]:12345", &input6);
+
+  set_addr6_scope_id(&input6, 101);
+  expect_sockaddr_str("[2001:db8::1%25101]:12345", &input6, 0);
+  expect_sockaddr_str("[2001:db8::1%25101]:12345", &input6, 1);
+  expect_sockaddr_uri("ipv6:[2001:db8::1%25101]:12345", &input6);
+
   input6 = make_addr6(kMapped, sizeof(kMapped));
   expect_sockaddr_str("[::ffff:192.0.2.1]:12345", &input6, 0);
   expect_sockaddr_str("192.0.2.1:12345", &input6, 1);
diff --git a/test/core/iomgr/tcp_server_posix_test.c b/test/core/iomgr/tcp_server_posix_test.c
index efadddc..6e51432 100644
--- a/test/core/iomgr/tcp_server_posix_test.c
+++ b/test/core/iomgr/tcp_server_posix_test.c
@@ -454,7 +454,8 @@
   const grpc_channel_args channel_args = {1, chan_args};
   struct ifaddrs *ifa = NULL;
   struct ifaddrs *ifa_it;
-  test_addrs dst_addrs;
+  // Zalloc dst_addrs to avoid oversized frames.
+  test_addrs *dst_addrs = gpr_zalloc(sizeof(*dst_addrs));
   grpc_test_init(argc, argv);
   grpc_init();
   g_pollset = gpr_zalloc(grpc_pollset_size());
@@ -469,24 +470,25 @@
     gpr_log(GPR_ERROR, "getifaddrs: %s", strerror(errno));
     return EXIT_FAILURE;
   }
-  dst_addrs.naddrs = 0;
-  for (ifa_it = ifa; ifa_it != NULL && dst_addrs.naddrs < MAX_ADDRS;
+  dst_addrs->naddrs = 0;
+  for (ifa_it = ifa; ifa_it != NULL && dst_addrs->naddrs < MAX_ADDRS;
        ifa_it = ifa_it->ifa_next) {
     if (ifa_it->ifa_addr == NULL) {
       continue;
     } else if (ifa_it->ifa_addr->sa_family == AF_INET) {
-      dst_addrs.addrs[dst_addrs.naddrs].addr.len = sizeof(struct sockaddr_in);
+      dst_addrs->addrs[dst_addrs->naddrs].addr.len = sizeof(struct sockaddr_in);
     } else if (ifa_it->ifa_addr->sa_family == AF_INET6) {
-      dst_addrs.addrs[dst_addrs.naddrs].addr.len = sizeof(struct sockaddr_in6);
+      dst_addrs->addrs[dst_addrs->naddrs].addr.len =
+          sizeof(struct sockaddr_in6);
     } else {
       continue;
     }
-    memcpy(dst_addrs.addrs[dst_addrs.naddrs].addr.addr, ifa_it->ifa_addr,
-           dst_addrs.addrs[dst_addrs.naddrs].addr.len);
+    memcpy(dst_addrs->addrs[dst_addrs->naddrs].addr.addr, ifa_it->ifa_addr,
+           dst_addrs->addrs[dst_addrs->naddrs].addr.len);
     GPR_ASSERT(
-        grpc_sockaddr_set_port(&dst_addrs.addrs[dst_addrs.naddrs].addr, 0));
-    test_addr_init_str(&dst_addrs.addrs[dst_addrs.naddrs]);
-    ++dst_addrs.naddrs;
+        grpc_sockaddr_set_port(&dst_addrs->addrs[dst_addrs->naddrs].addr, 0));
+    test_addr_init_str(&dst_addrs->addrs[dst_addrs->naddrs]);
+    ++dst_addrs->naddrs;
   }
   freeifaddrs(ifa);
   ifa = NULL;
@@ -495,20 +497,21 @@
   test_connect(1, NULL, NULL, false);
   test_connect(10, NULL, NULL, false);
 
-  /* Set dst_addrs.addrs[i].len=0 for dst_addrs that are unreachable with a "::"
-     listener. */
-  test_connect(1, NULL, &dst_addrs, true);
+  /* Set dst_addrs->addrs[i].len=0 for dst_addrs that are unreachable with a
+     "::" listener. */
+  test_connect(1, NULL, dst_addrs, true);
 
   /* Test connect(2) with dst_addrs. */
-  test_connect(1, &channel_args, &dst_addrs, false);
+  test_connect(1, &channel_args, dst_addrs, false);
   /* Test connect(2) with dst_addrs. */
-  test_connect(10, &channel_args, &dst_addrs, false);
+  test_connect(10, &channel_args, dst_addrs, false);
 
   grpc_closure_init(&destroyed, destroy_pollset, g_pollset,
                     grpc_schedule_on_exec_ctx);
   grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
   grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
+  gpr_free(dst_addrs);
   gpr_free(g_pollset);
   return EXIT_SUCCESS;
 }
diff --git a/test/core/slice/percent_encoding_test.c b/test/core/slice/percent_encoding_test.c
index 222e695..89f8154 100644
--- a/test/core/slice/percent_encoding_test.c
+++ b/test/core/slice/percent_encoding_test.c
@@ -146,6 +146,7 @@
   TEST_VECTOR("\x0f", "%0F", grpc_url_percent_encoding_unreserved_bytes);
   TEST_VECTOR("\xff", "%FF", grpc_url_percent_encoding_unreserved_bytes);
   TEST_VECTOR("\xee", "%EE", grpc_url_percent_encoding_unreserved_bytes);
+  TEST_VECTOR("%2", "%252", grpc_url_percent_encoding_unreserved_bytes);
   TEST_NONCONFORMANT_VECTOR("%", "%",
                             grpc_url_percent_encoding_unreserved_bytes);
   TEST_NONCONFORMANT_VECTOR("%A", "%A",
diff --git a/test/core/transport/BUILD b/test/core/transport/BUILD
index 865b0c2..08b2fd3 100644
--- a/test/core/transport/BUILD
+++ b/test/core/transport/BUILD
@@ -65,6 +65,13 @@
 )
 
 cc_test(
+    name = "stream_owned_slice_test",
+    srcs = ["stream_owned_slice_test.c"],
+    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
     name = "timeout_encoding_test",
     srcs = ["timeout_encoding_test.c"],
     deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
diff --git a/test/core/transport/stream_owned_slice_test.c b/test/core/transport/stream_owned_slice_test.c
new file mode 100644
index 0000000..97ba108
--- /dev/null
+++ b/test/core/transport/stream_owned_slice_test.c
@@ -0,0 +1,58 @@
+/*
+ *
+ * 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/transport/transport.h"
+
+#include "test/core/util/test_config.h"
+
+#include <grpc/support/log.h>
+
+static void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {}
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+
+  uint8_t buffer[] = "abc123";
+  grpc_stream_refcount r;
+  GRPC_STREAM_REF_INIT(&r, 1, do_nothing, NULL, "test");
+  GPR_ASSERT(r.refs.count == 1);
+  grpc_slice slice =
+      grpc_slice_from_stream_owned_buffer(&r, buffer, sizeof(buffer));
+  GPR_ASSERT(GRPC_SLICE_START_PTR(slice) == buffer);
+  GPR_ASSERT(GRPC_SLICE_LENGTH(slice) == sizeof(buffer));
+  GPR_ASSERT(r.refs.count == 2);
+  grpc_slice_unref(slice);
+  GPR_ASSERT(r.refs.count == 1);
+
+  return 0;
+}
diff --git a/test/core/util/port_server_client.c b/test/core/util/port_server_client.c
index a851d01..38054dd 100644
--- a/test/core/util/port_server_client.c
+++ b/test/core/util/port_server_client.c
@@ -162,6 +162,15 @@
   if (failed) {
     grpc_httpcli_request req;
     memset(&req, 0, sizeof(req));
+    if (pr->retries >= 5) {
+      gpr_mu_lock(pr->mu);
+      pr->port = 0;
+      GRPC_LOG_IF_ERROR(
+          "pollset_kick",
+          grpc_pollset_kick(grpc_polling_entity_pollset(&pr->pops), NULL));
+      gpr_mu_unlock(pr->mu);
+      return;
+    }
     GPR_ASSERT(pr->retries < 10);
     gpr_sleep_until(gpr_time_add(
         gpr_now(GPR_CLOCK_REALTIME),
diff --git a/test/cpp/codegen/compiler_test_golden b/test/cpp/codegen/compiler_test_golden
index 0b82f2a..fd26a17 100644
--- a/test/cpp/codegen/compiler_test_golden
+++ b/test/cpp/codegen/compiler_test_golden
@@ -1,4 +1,4 @@
-// Generated by the gRPC protobuf plugin.
+// Generated by the gRPC C++ plugin.
 // If you make any local change, they will be lost.
 // source: src/proto/grpc/testing/compiler_test.proto
 // Original file comments:
diff --git a/test/cpp/microbenchmarks/bm_metadata.cc b/test/cpp/microbenchmarks/bm_metadata.cc
index 07c55f4..ee3dec2 100644
--- a/test/cpp/microbenchmarks/bm_metadata.cc
+++ b/test/cpp/microbenchmarks/bm_metadata.cc
@@ -36,8 +36,10 @@
 #include <grpc/grpc.h>
 
 extern "C" {
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/transport/metadata.h"
 #include "src/core/lib/transport/static_metadata.h"
+#include "src/core/lib/transport/transport.h"
 }
 
 #include "test/cpp/microbenchmarks/helpers.h"
@@ -63,6 +65,19 @@
 }
 BENCHMARK(BM_SliceFromCopied);
 
+static void BM_SliceFromStreamOwnedBuffer(benchmark::State& state) {
+  grpc_stream_refcount r;
+  GRPC_STREAM_REF_INIT(&r, 1, NULL, NULL, "test");
+  char buffer[64];
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  while (state.KeepRunning()) {
+    grpc_slice_unref_internal(&exec_ctx, grpc_slice_from_stream_owned_buffer(
+                                             &r, buffer, sizeof(buffer)));
+  }
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+BENCHMARK(BM_SliceFromStreamOwnedBuffer);
+
 static void BM_SliceIntern(benchmark::State& state) {
   TrackCounters track_counters;
   gpr_slice slice = grpc_slice_from_static_string("abc");
diff --git a/third_party/protobuf b/third_party/protobuf
index a428e42..593e917 160000
--- a/third_party/protobuf
+++ b/third_party/protobuf
@@ -1 +1 @@
-Subproject commit a428e42072765993ff674fda72863c9f1aa2d268
+Subproject commit 593e917c176b5bc5aafa57bf9f6030d749d91cd5
diff --git a/tools/distrib/python/bazel_deps.sh b/tools/distrib/python/bazel_deps.sh
index de3ee07..f6d42d2 100755
--- a/tools/distrib/python/bazel_deps.sh
+++ b/tools/distrib/python/bazel_deps.sh
@@ -33,14 +33,14 @@
 
 # First check if bazel is installed on the machine. If it is, then we don't need
 # to invoke the docker bazel.
-if [ "bazel version" ]
+if [ -x "$(command -v bazel)" ]
 then
   cd third_party/protobuf
   bazel query 'deps('$1')'
 else
-  docker build -t bazel `realpath ./tools/dockerfile/bazel/`
-  docker run -v "`realpath .`:/src/grpc/"          \
-    -w /src/grpc/third_party/protobuf              \
-    bazel                                          \
+  docker build -t bazel_local_img tools/dockerfile/test/sanity
+  docker run -v "$(realpath .):/src/grpc/:ro" \
+    -w /src/grpc/third_party/protobuf         \
+    bazel_local_img                           \
     bazel query 'deps('$1')'
 fi
diff --git a/tools/distrib/python/grpcio_tools/grpc_tools/protobuf_generated_well_known_types_embed.cc b/tools/distrib/python/grpcio_tools/grpc_tools/protobuf_generated_well_known_types_embed.cc
new file mode 100644
index 0000000..682837a
--- /dev/null
+++ b/tools/distrib/python/grpcio_tools/grpc_tools/protobuf_generated_well_known_types_embed.cc
@@ -0,0 +1,343 @@
+// 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.
+
+// HACK: Embed the generated well_known_types_js.cc to make
+// grpc-tools python package compilation easy.
+#include <google/protobuf/compiler/js/well_known_types_embed.h>
+struct FileToc well_known_types_js[] = {
+{"any.js",
+  "// Protocol Buffers - Google's data interchange format\n"
+  "// Copyright 2008 Google Inc.  All rights reserved.\n"
+  "// https://developers.google.com/protocol-buffers/\n"
+  "//\n"
+  "// Redistribution and use in source and binary forms, with or without\n"
+  "// modification, are permitted provided that the following conditions are\n"
+  "// met:\n"
+  "//\n"
+  "//     * Redistributions of source code must retain the above copyright\n"
+  "// notice, this list of conditions and the following disclaimer.\n"
+  "//     * Redistributions in binary form must reproduce the above\n"
+  "// copyright notice, this list of conditions and the following disclaimer\n"
+  "// in the documentation and/or other materials provided with the\n"
+  "// distribution.\n"
+  "//     * Neither the name of Google Inc. nor the names of its\n"
+  "// contributors may be used to endorse or promote products derived from\n"
+  "// this software without specific prior written permission.\n"
+  "//\n"
+  "// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
+  "// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n"
+  "// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n"
+  "// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n"
+  "// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n"
+  "// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n"
+  "// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n"
+  "// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n"
+  "// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
+  "// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n"
+  "// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
+  "\n"
+  "/* This code will be inserted into generated code for\n"
+  " * google/protobuf/any.proto. */\n"
+  "\n"
+  "/**\n"
+  " * Returns the type name contained in this instance, if any.\n"
+  " * @return {string|undefined}\n"
+  " */\n"
+  "proto.google.protobuf.Any.prototype.getTypeName = function() {\n"
+  "  return this.getTypeUrl().split('/').pop();\n"
+  "};\n"
+  "\n"
+  "\n"
+  "/**\n"
+  " * Packs the given message instance into this Any.\n"
+  " * @param {!Uint8Array} serialized The serialized data to pack.\n"
+  " * @param {string} name The type name of this message object.\n"
+  " * @param {string=} opt_typeUrlPrefix the type URL prefix.\n"
+  " */\n"
+  "proto.google.protobuf.Any.prototype.pack = function(serialized, name,\n"
+  "                                                    opt_typeUrlPrefix) {\n"
+  "  if (!opt_typeUrlPrefix) {\n"
+  "    opt_typeUrlPrefix = 'type.googleapis.com/';\n"
+  "  }\n"
+  "\n"
+  "  if (opt_typeUrlPrefix.substr(-1) != '/') {\n"
+  "    this.setTypeUrl(opt_typeUrlPrefix + '/' + name);\n"
+  "  } else {\n"
+  "    this.setTypeUrl(opt_typeUrlPrefix + name);\n"
+  "  }\n"
+  "\n"
+  "  this.setValue(serialized);\n"
+  "};\n"
+  "\n"
+  "\n"
+  "/**\n"
+  " * @template T\n"
+  " * Unpacks this Any into the given message object.\n"
+  " * @param {function(Uint8Array):T} deserialize Function that will deserialize\n"
+  " *     the binary data properly.\n"
+  " * @param {string} name The expected type name of this message object.\n"
+  " * @return {?T} If the name matched the expected name, returns the deserialized\n"
+  " *     object, otherwise returns undefined.\n"
+  " */\n"
+  "proto.google.protobuf.Any.prototype.unpack = function(deserialize, name) {\n"
+  "  if (this.getTypeName() == name) {\n"
+  "    return deserialize(this.getValue_asU8());\n"
+  "  } else {\n"
+  "    return null;\n"
+  "  }\n"
+  "};\n"
+},
+{"struct.js",
+  "// Protocol Buffers - Google's data interchange format\n"
+  "// Copyright 2008 Google Inc.  All rights reserved.\n"
+  "// https://developers.google.com/protocol-buffers/\n"
+  "//\n"
+  "// Redistribution and use in source and binary forms, with or without\n"
+  "// modification, are permitted provided that the following conditions are\n"
+  "// met:\n"
+  "//\n"
+  "//     * Redistributions of source code must retain the above copyright\n"
+  "// notice, this list of conditions and the following disclaimer.\n"
+  "//     * Redistributions in binary form must reproduce the above\n"
+  "// copyright notice, this list of conditions and the following disclaimer\n"
+  "// in the documentation and/or other materials provided with the\n"
+  "// distribution.\n"
+  "//     * Neither the name of Google Inc. nor the names of its\n"
+  "// contributors may be used to endorse or promote products derived from\n"
+  "// this software without specific prior written permission.\n"
+  "//\n"
+  "// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
+  "// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n"
+  "// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n"
+  "// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n"
+  "// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n"
+  "// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n"
+  "// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n"
+  "// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n"
+  "// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
+  "// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n"
+  "// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
+  "\n"
+  "/* This code will be inserted into generated code for\n"
+  " * google/protobuf/struct.proto. */\n"
+  "\n"
+  "/**\n"
+  " * Typedef representing plain JavaScript values that can go into a\n"
+  " *     Struct.\n"
+  " * @typedef {null|number|string|boolean|Array|Object}\n"
+  " */\n"
+  "proto.google.protobuf.JavaScriptValue;\n"
+  "\n"
+  "\n"
+  "/**\n"
+  " * Converts this Value object to a plain JavaScript value.\n"
+  " * @return {?proto.google.protobuf.JavaScriptValue} a plain JavaScript\n"
+  " *     value representing this Struct.\n"
+  " */\n"
+  "proto.google.protobuf.Value.prototype.toJavaScript = function() {\n"
+  "  var kindCase = proto.google.protobuf.Value.KindCase;\n"
+  "  switch (this.getKindCase()) {\n"
+  "    case kindCase.NULL_VALUE:\n"
+  "      return null;\n"
+  "    case kindCase.NUMBER_VALUE:\n"
+  "      return this.getNumberValue();\n"
+  "    case kindCase.STRING_VALUE:\n"
+  "      return this.getStringValue();\n"
+  "    case kindCase.BOOL_VALUE:\n"
+  "      return this.getBoolValue();\n"
+  "    case kindCase.STRUCT_VALUE:\n"
+  "      return this.getStructValue().toJavaScript();\n"
+  "    case kindCase.LIST_VALUE:\n"
+  "      return this.getListValue().toJavaScript();\n"
+  "    default:\n"
+  "      throw new Error('Unexpected struct type');\n"
+  "  }\n"
+  "};\n"
+  "\n"
+  "\n"
+  "/**\n"
+  " * Converts this JavaScript value to a new Value proto.\n"
+  " * @param {!proto.google.protobuf.JavaScriptValue} value The value to\n"
+  " *     convert.\n"
+  " * @return {!proto.google.protobuf.Value} The newly constructed value.\n"
+  " */\n"
+  "proto.google.protobuf.Value.fromJavaScript = function(value) {\n"
+  "  var ret = new proto.google.protobuf.Value();\n"
+  "  switch (goog.typeOf(value)) {\n"
+  "    case 'string':\n"
+  "      ret.setStringValue(/** @type {string} */ (value));\n"
+  "      break;\n"
+  "    case 'number':\n"
+  "      ret.setNumberValue(/** @type {number} */ (value));\n"
+  "      break;\n"
+  "    case 'boolean':\n"
+  "      ret.setBoolValue(/** @type {boolean} */ (value));\n"
+  "      break;\n"
+  "    case 'null':\n"
+  "      ret.setNullValue(proto.google.protobuf.NullValue.NULL_VALUE);\n"
+  "      break;\n"
+  "    case 'array':\n"
+  "      ret.setListValue(proto.google.protobuf.ListValue.fromJavaScript(\n"
+  "          /** @type{!Array} */ (value)));\n"
+  "      break;\n"
+  "    case 'object':\n"
+  "      ret.setStructValue(proto.google.protobuf.Struct.fromJavaScript(\n"
+  "          /** @type{!Object} */ (value)));\n"
+  "      break;\n"
+  "    default:\n"
+  "      throw new Error('Unexpected struct type.');\n"
+  "  }\n"
+  "\n"
+  "  return ret;\n"
+  "};\n"
+  "\n"
+  "\n"
+  "/**\n"
+  " * Converts this ListValue object to a plain JavaScript array.\n"
+  " * @return {!Array} a plain JavaScript array representing this List.\n"
+  " */\n"
+  "proto.google.protobuf.ListValue.prototype.toJavaScript = function() {\n"
+  "  var ret = [];\n"
+  "  var values = this.getValuesList();\n"
+  "\n"
+  "  for (var i = 0; i < values.length; i++) {\n"
+  "    ret[i] = values[i].toJavaScript();\n"
+  "  }\n"
+  "\n"
+  "  return ret;\n"
+  "};\n"
+  "\n"
+  "\n"
+  "/**\n"
+  " * Constructs a ListValue protobuf from this plain JavaScript array.\n"
+  " * @param {!Array} array a plain JavaScript array\n"
+  " * @return {proto.google.protobuf.ListValue} a new ListValue object\n"
+  " */\n"
+  "proto.google.protobuf.ListValue.fromJavaScript = function(array) {\n"
+  "  var ret = new proto.google.protobuf.ListValue();\n"
+  "\n"
+  "  for (var i = 0; i < array.length; i++) {\n"
+  "    ret.addValues(proto.google.protobuf.Value.fromJavaScript(array[i]));\n"
+  "  }\n"
+  "\n"
+  "  return ret;\n"
+  "};\n"
+  "\n"
+  "\n"
+  "/**\n"
+  " * Converts this Struct object to a plain JavaScript object.\n"
+  " * @return {!Object<string, !proto.google.protobuf.JavaScriptValue>} a plain\n"
+  " *     JavaScript object representing this Struct.\n"
+  " */\n"
+  "proto.google.protobuf.Struct.prototype.toJavaScript = function() {\n"
+  "  var ret = {};\n"
+  "\n"
+  "  this.getFieldsMap().forEach(function(value, key) {\n"
+  "    ret[key] = value.toJavaScript();\n"
+  "  });\n"
+  "\n"
+  "  return ret;\n"
+  "};\n"
+  "\n"
+  "\n"
+  "/**\n"
+  " * Constructs a Struct protobuf from this plain JavaScript object.\n"
+  " * @param {!Object} obj a plain JavaScript object\n"
+  " * @return {proto.google.protobuf.Struct} a new Struct object\n"
+  " */\n"
+  "proto.google.protobuf.Struct.fromJavaScript = function(obj) {\n"
+  "  var ret = new proto.google.protobuf.Struct();\n"
+  "  var map = ret.getFieldsMap();\n"
+  "\n"
+  "  for (var property in obj) {\n"
+  "    var val = obj[property];\n"
+  "    map.set(property, proto.google.protobuf.Value.fromJavaScript(val));\n"
+  "  }\n"
+  "\n"
+  "  return ret;\n"
+  "};\n"
+},
+{"timestamp.js",
+  "// Protocol Buffers - Google's data interchange format\n"
+  "// Copyright 2008 Google Inc.  All rights reserved.\n"
+  "// https://developers.google.com/protocol-buffers/\n"
+  "//\n"
+  "// Redistribution and use in source and binary forms, with or without\n"
+  "// modification, are permitted provided that the following conditions are\n"
+  "// met:\n"
+  "//\n"
+  "//     * Redistributions of source code must retain the above copyright\n"
+  "// notice, this list of conditions and the following disclaimer.\n"
+  "//     * Redistributions in binary form must reproduce the above\n"
+  "// copyright notice, this list of conditions and the following disclaimer\n"
+  "// in the documentation and/or other materials provided with the\n"
+  "// distribution.\n"
+  "//     * Neither the name of Google Inc. nor the names of its\n"
+  "// contributors may be used to endorse or promote products derived from\n"
+  "// this software without specific prior written permission.\n"
+  "//\n"
+  "// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
+  "// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n"
+  "// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n"
+  "// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n"
+  "// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n"
+  "// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n"
+  "// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n"
+  "// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n"
+  "// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
+  "// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n"
+  "// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
+  "\n"
+  "/* This code will be inserted into generated code for\n"
+  " * google/protobuf/timestamp.proto. */\n"
+  "\n"
+  "/**\n"
+  " * Returns a JavaScript 'Date' object corresponding to this Timestamp.\n"
+  " * @return {!Date}\n"
+  " */\n"
+  "proto.google.protobuf.Timestamp.prototype.toDate = function() {\n"
+  "  var seconds = this.getSeconds();\n"
+  "  var nanos = this.getNanos();\n"
+  "\n"
+  "  return new Date((seconds * 1000) + (nanos / 1000000));\n"
+  "};\n"
+  "\n"
+  "\n"
+  "/**\n"
+  " * Sets the value of this Timestamp object to be the given Date.\n"
+  " * @param {!Date} value The value to set.\n"
+  " */\n"
+  "proto.google.protobuf.Timestamp.prototype.fromDate = function(value) {\n"
+  "  var millis = value.getTime();\n"
+  "  this.setSeconds(Math.floor(value.getTime() / 1000));\n"
+  "  this.setNanos(value.getMilliseconds() * 1000000);\n"
+  "};\n"
+},
+  {NULL, NULL}  // Terminate the list.
+};
diff --git a/tools/distrib/python/grpcio_tools/protoc_lib_deps.py b/tools/distrib/python/grpcio_tools/protoc_lib_deps.py
index 569328e..c2aa619 100644
--- a/tools/distrib/python/grpcio_tools/protoc_lib_deps.py
+++ b/tools/distrib/python/grpcio_tools/protoc_lib_deps.py
@@ -29,7 +29,7 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 # AUTO-GENERATED BY make_grpcio_tools.py!
-CC_FILES=['google/protobuf/compiler/zip_writer.cc', 'google/protobuf/compiler/subprocess.cc', 'google/protobuf/compiler/ruby/ruby_generator.cc', 'google/protobuf/compiler/python/python_generator.cc', 'google/protobuf/compiler/plugin.pb.cc', 'google/protobuf/compiler/plugin.cc', 'google/protobuf/compiler/php/php_generator.cc', 'google/protobuf/compiler/objectivec/objectivec_primitive_field.cc', 'google/protobuf/compiler/objectivec/objectivec_oneof.cc', 'google/protobuf/compiler/objectivec/objectivec_message_field.cc', 'google/protobuf/compiler/objectivec/objectivec_message.cc', 'google/protobuf/compiler/objectivec/objectivec_map_field.cc', 'google/protobuf/compiler/objectivec/objectivec_helpers.cc', 'google/protobuf/compiler/objectivec/objectivec_generator.cc', 'google/protobuf/compiler/objectivec/objectivec_file.cc', 'google/protobuf/compiler/objectivec/objectivec_field.cc', 'google/protobuf/compiler/objectivec/objectivec_extension.cc', 'google/protobuf/compiler/objectivec/objectivec_enum_field.cc', 'google/protobuf/compiler/objectivec/objectivec_enum.cc', 'google/protobuf/compiler/js/js_generator.cc', 'google/protobuf/compiler/javanano/javanano_primitive_field.cc', 'google/protobuf/compiler/javanano/javanano_message_field.cc', 'google/protobuf/compiler/javanano/javanano_message.cc', 'google/protobuf/compiler/javanano/javanano_map_field.cc', 'google/protobuf/compiler/javanano/javanano_helpers.cc', 'google/protobuf/compiler/javanano/javanano_generator.cc', 'google/protobuf/compiler/javanano/javanano_file.cc', 'google/protobuf/compiler/javanano/javanano_field.cc', 'google/protobuf/compiler/javanano/javanano_extension.cc', 'google/protobuf/compiler/javanano/javanano_enum_field.cc', 'google/protobuf/compiler/javanano/javanano_enum.cc', 'google/protobuf/compiler/java/java_string_field_lite.cc', 'google/protobuf/compiler/java/java_string_field.cc', 'google/protobuf/compiler/java/java_shared_code_generator.cc', 'google/protobuf/compiler/java/java_service.cc', 'google/protobuf/compiler/java/java_primitive_field_lite.cc', 'google/protobuf/compiler/java/java_primitive_field.cc', 'google/protobuf/compiler/java/java_name_resolver.cc', 'google/protobuf/compiler/java/java_message_lite.cc', 'google/protobuf/compiler/java/java_message_field_lite.cc', 'google/protobuf/compiler/java/java_message_field.cc', 'google/protobuf/compiler/java/java_message_builder_lite.cc', 'google/protobuf/compiler/java/java_message_builder.cc', 'google/protobuf/compiler/java/java_message.cc', 'google/protobuf/compiler/java/java_map_field_lite.cc', 'google/protobuf/compiler/java/java_map_field.cc', 'google/protobuf/compiler/java/java_lazy_message_field_lite.cc', 'google/protobuf/compiler/java/java_lazy_message_field.cc', 'google/protobuf/compiler/java/java_helpers.cc', 'google/protobuf/compiler/java/java_generator_factory.cc', 'google/protobuf/compiler/java/java_generator.cc', 'google/protobuf/compiler/java/java_file.cc', 'google/protobuf/compiler/java/java_field.cc', 'google/protobuf/compiler/java/java_extension_lite.cc', 'google/protobuf/compiler/java/java_extension.cc', 'google/protobuf/compiler/java/java_enum_lite.cc', 'google/protobuf/compiler/java/java_enum_field_lite.cc', 'google/protobuf/compiler/java/java_enum_field.cc', 'google/protobuf/compiler/java/java_enum.cc', 'google/protobuf/compiler/java/java_doc_comment.cc', 'google/protobuf/compiler/java/java_context.cc', 'google/protobuf/compiler/csharp/csharp_wrapper_field.cc', 'google/protobuf/compiler/csharp/csharp_source_generator_base.cc', 'google/protobuf/compiler/csharp/csharp_repeated_primitive_field.cc', 'google/protobuf/compiler/csharp/csharp_repeated_message_field.cc', 'google/protobuf/compiler/csharp/csharp_repeated_enum_field.cc', 'google/protobuf/compiler/csharp/csharp_reflection_class.cc', 'google/protobuf/compiler/csharp/csharp_primitive_field.cc', 'google/protobuf/compiler/csharp/csharp_message_field.cc', 'google/protobuf/compiler/csharp/csharp_message.cc', 'google/protobuf/compiler/csharp/csharp_map_field.cc', 'google/protobuf/compiler/csharp/csharp_helpers.cc', 'google/protobuf/compiler/csharp/csharp_generator.cc', 'google/protobuf/compiler/csharp/csharp_field_base.cc', 'google/protobuf/compiler/csharp/csharp_enum_field.cc', 'google/protobuf/compiler/csharp/csharp_enum.cc', 'google/protobuf/compiler/csharp/csharp_doc_comment.cc', 'google/protobuf/compiler/cpp/cpp_string_field.cc', 'google/protobuf/compiler/cpp/cpp_service.cc', 'google/protobuf/compiler/cpp/cpp_primitive_field.cc', 'google/protobuf/compiler/cpp/cpp_message_field.cc', 'google/protobuf/compiler/cpp/cpp_message.cc', 'google/protobuf/compiler/cpp/cpp_map_field.cc', 'google/protobuf/compiler/cpp/cpp_helpers.cc', 'google/protobuf/compiler/cpp/cpp_generator.cc', 'google/protobuf/compiler/cpp/cpp_file.cc', 'google/protobuf/compiler/cpp/cpp_field.cc', 'google/protobuf/compiler/cpp/cpp_extension.cc', 'google/protobuf/compiler/cpp/cpp_enum_field.cc', 'google/protobuf/compiler/cpp/cpp_enum.cc', 'google/protobuf/compiler/command_line_interface.cc', 'google/protobuf/compiler/code_generator.cc', 'google/protobuf/wrappers.pb.cc', 'google/protobuf/wire_format.cc', 'google/protobuf/util/type_resolver_util.cc', 'google/protobuf/util/time_util.cc', 'google/protobuf/util/message_differencer.cc', 'google/protobuf/util/json_util.cc', 'google/protobuf/util/internal/utility.cc', 'google/protobuf/util/internal/type_info_test_helper.cc', 'google/protobuf/util/internal/type_info.cc', 'google/protobuf/util/internal/protostream_objectwriter.cc', 'google/protobuf/util/internal/protostream_objectsource.cc', 'google/protobuf/util/internal/proto_writer.cc', 'google/protobuf/util/internal/object_writer.cc', 'google/protobuf/util/internal/json_stream_parser.cc', 'google/protobuf/util/internal/json_objectwriter.cc', 'google/protobuf/util/internal/json_escaping.cc', 'google/protobuf/util/internal/field_mask_utility.cc', 'google/protobuf/util/internal/error_listener.cc', 'google/protobuf/util/internal/default_value_objectwriter.cc', 'google/protobuf/util/internal/datapiece.cc', 'google/protobuf/util/field_mask_util.cc', 'google/protobuf/util/field_comparator.cc', 'google/protobuf/unknown_field_set.cc', 'google/protobuf/type.pb.cc', 'google/protobuf/timestamp.pb.cc', 'google/protobuf/text_format.cc', 'google/protobuf/stubs/substitute.cc', 'google/protobuf/stubs/mathlimits.cc', 'google/protobuf/struct.pb.cc', 'google/protobuf/source_context.pb.cc', 'google/protobuf/service.cc', 'google/protobuf/reflection_ops.cc', 'google/protobuf/message.cc', 'google/protobuf/map_field.cc', 'google/protobuf/io/zero_copy_stream_impl.cc', 'google/protobuf/io/tokenizer.cc', 'google/protobuf/io/strtod.cc', 'google/protobuf/io/printer.cc', 'google/protobuf/io/gzip_stream.cc', 'google/protobuf/generated_message_reflection.cc', 'google/protobuf/field_mask.pb.cc', 'google/protobuf/extension_set_heavy.cc', 'google/protobuf/empty.pb.cc', 'google/protobuf/dynamic_message.cc', 'google/protobuf/duration.pb.cc', 'google/protobuf/descriptor_database.cc', 'google/protobuf/descriptor.pb.cc', 'google/protobuf/descriptor.cc', 'google/protobuf/compiler/parser.cc', 'google/protobuf/compiler/importer.cc', 'google/protobuf/api.pb.cc', 'google/protobuf/any.pb.cc', 'google/protobuf/any.cc', 'google/protobuf/wire_format_lite.cc', 'google/protobuf/stubs/time.cc', 'google/protobuf/stubs/strutil.cc', 'google/protobuf/stubs/structurally_valid.cc', 'google/protobuf/stubs/stringprintf.cc', 'google/protobuf/stubs/stringpiece.cc', 'google/protobuf/stubs/statusor.cc', 'google/protobuf/stubs/status.cc', 'google/protobuf/stubs/once.cc', 'google/protobuf/stubs/int128.cc', 'google/protobuf/stubs/common.cc', 'google/protobuf/stubs/bytestream.cc', 'google/protobuf/stubs/atomicops_internals_x86_msvc.cc', 'google/protobuf/stubs/atomicops_internals_x86_gcc.cc', 'google/protobuf/repeated_field.cc', 'google/protobuf/message_lite.cc', 'google/protobuf/io/zero_copy_stream_impl_lite.cc', 'google/protobuf/io/zero_copy_stream.cc', 'google/protobuf/io/coded_stream.cc', 'google/protobuf/generated_message_util.cc', 'google/protobuf/extension_set.cc', 'google/protobuf/arenastring.cc', 'google/protobuf/arena.cc']
+CC_FILES=['google/protobuf/compiler/zip_writer.cc', 'google/protobuf/compiler/subprocess.cc', 'google/protobuf/compiler/ruby/ruby_generator.cc', 'google/protobuf/compiler/python/python_generator.cc', 'google/protobuf/compiler/plugin.pb.cc', 'google/protobuf/compiler/plugin.cc', 'google/protobuf/compiler/php/php_generator.cc', 'google/protobuf/compiler/objectivec/objectivec_primitive_field.cc', 'google/protobuf/compiler/objectivec/objectivec_oneof.cc', 'google/protobuf/compiler/objectivec/objectivec_message_field.cc', 'google/protobuf/compiler/objectivec/objectivec_message.cc', 'google/protobuf/compiler/objectivec/objectivec_map_field.cc', 'google/protobuf/compiler/objectivec/objectivec_helpers.cc', 'google/protobuf/compiler/objectivec/objectivec_generator.cc', 'google/protobuf/compiler/objectivec/objectivec_file.cc', 'google/protobuf/compiler/objectivec/objectivec_field.cc', 'google/protobuf/compiler/objectivec/objectivec_extension.cc', 'google/protobuf/compiler/objectivec/objectivec_enum_field.cc', 'google/protobuf/compiler/objectivec/objectivec_enum.cc', 'google/protobuf/compiler/js/well_known_types_embed.cc', 'google/protobuf/compiler/js/js_generator.cc', 'google/protobuf/compiler/javanano/javanano_primitive_field.cc', 'google/protobuf/compiler/javanano/javanano_message_field.cc', 'google/protobuf/compiler/javanano/javanano_message.cc', 'google/protobuf/compiler/javanano/javanano_map_field.cc', 'google/protobuf/compiler/javanano/javanano_helpers.cc', 'google/protobuf/compiler/javanano/javanano_generator.cc', 'google/protobuf/compiler/javanano/javanano_file.cc', 'google/protobuf/compiler/javanano/javanano_field.cc', 'google/protobuf/compiler/javanano/javanano_extension.cc', 'google/protobuf/compiler/javanano/javanano_enum_field.cc', 'google/protobuf/compiler/javanano/javanano_enum.cc', 'google/protobuf/compiler/java/java_string_field_lite.cc', 'google/protobuf/compiler/java/java_string_field.cc', 'google/protobuf/compiler/java/java_shared_code_generator.cc', 'google/protobuf/compiler/java/java_service.cc', 'google/protobuf/compiler/java/java_primitive_field_lite.cc', 'google/protobuf/compiler/java/java_primitive_field.cc', 'google/protobuf/compiler/java/java_name_resolver.cc', 'google/protobuf/compiler/java/java_message_lite.cc', 'google/protobuf/compiler/java/java_message_field_lite.cc', 'google/protobuf/compiler/java/java_message_field.cc', 'google/protobuf/compiler/java/java_message_builder_lite.cc', 'google/protobuf/compiler/java/java_message_builder.cc', 'google/protobuf/compiler/java/java_message.cc', 'google/protobuf/compiler/java/java_map_field_lite.cc', 'google/protobuf/compiler/java/java_map_field.cc', 'google/protobuf/compiler/java/java_lazy_message_field_lite.cc', 'google/protobuf/compiler/java/java_lazy_message_field.cc', 'google/protobuf/compiler/java/java_helpers.cc', 'google/protobuf/compiler/java/java_generator_factory.cc', 'google/protobuf/compiler/java/java_generator.cc', 'google/protobuf/compiler/java/java_file.cc', 'google/protobuf/compiler/java/java_field.cc', 'google/protobuf/compiler/java/java_extension_lite.cc', 'google/protobuf/compiler/java/java_extension.cc', 'google/protobuf/compiler/java/java_enum_lite.cc', 'google/protobuf/compiler/java/java_enum_field_lite.cc', 'google/protobuf/compiler/java/java_enum_field.cc', 'google/protobuf/compiler/java/java_enum.cc', 'google/protobuf/compiler/java/java_doc_comment.cc', 'google/protobuf/compiler/java/java_context.cc', 'google/protobuf/compiler/csharp/csharp_wrapper_field.cc', 'google/protobuf/compiler/csharp/csharp_source_generator_base.cc', 'google/protobuf/compiler/csharp/csharp_repeated_primitive_field.cc', 'google/protobuf/compiler/csharp/csharp_repeated_message_field.cc', 'google/protobuf/compiler/csharp/csharp_repeated_enum_field.cc', 'google/protobuf/compiler/csharp/csharp_reflection_class.cc', 'google/protobuf/compiler/csharp/csharp_primitive_field.cc', 'google/protobuf/compiler/csharp/csharp_message_field.cc', 'google/protobuf/compiler/csharp/csharp_message.cc', 'google/protobuf/compiler/csharp/csharp_map_field.cc', 'google/protobuf/compiler/csharp/csharp_helpers.cc', 'google/protobuf/compiler/csharp/csharp_generator.cc', 'google/protobuf/compiler/csharp/csharp_field_base.cc', 'google/protobuf/compiler/csharp/csharp_enum_field.cc', 'google/protobuf/compiler/csharp/csharp_enum.cc', 'google/protobuf/compiler/csharp/csharp_doc_comment.cc', 'google/protobuf/compiler/cpp/cpp_string_field.cc', 'google/protobuf/compiler/cpp/cpp_service.cc', 'google/protobuf/compiler/cpp/cpp_primitive_field.cc', 'google/protobuf/compiler/cpp/cpp_message_field.cc', 'google/protobuf/compiler/cpp/cpp_message.cc', 'google/protobuf/compiler/cpp/cpp_map_field.cc', 'google/protobuf/compiler/cpp/cpp_helpers.cc', 'google/protobuf/compiler/cpp/cpp_generator.cc', 'google/protobuf/compiler/cpp/cpp_file.cc', 'google/protobuf/compiler/cpp/cpp_field.cc', 'google/protobuf/compiler/cpp/cpp_extension.cc', 'google/protobuf/compiler/cpp/cpp_enum_field.cc', 'google/protobuf/compiler/cpp/cpp_enum.cc', 'google/protobuf/compiler/command_line_interface.cc', 'google/protobuf/compiler/code_generator.cc', 'google/protobuf/wrappers.pb.cc', 'google/protobuf/wire_format.cc', 'google/protobuf/util/type_resolver_util.cc', 'google/protobuf/util/time_util.cc', 'google/protobuf/util/message_differencer.cc', 'google/protobuf/util/json_util.cc', 'google/protobuf/util/internal/utility.cc', 'google/protobuf/util/internal/type_info_test_helper.cc', 'google/protobuf/util/internal/type_info.cc', 'google/protobuf/util/internal/protostream_objectwriter.cc', 'google/protobuf/util/internal/protostream_objectsource.cc', 'google/protobuf/util/internal/proto_writer.cc', 'google/protobuf/util/internal/object_writer.cc', 'google/protobuf/util/internal/json_stream_parser.cc', 'google/protobuf/util/internal/json_objectwriter.cc', 'google/protobuf/util/internal/json_escaping.cc', 'google/protobuf/util/internal/field_mask_utility.cc', 'google/protobuf/util/internal/error_listener.cc', 'google/protobuf/util/internal/default_value_objectwriter.cc', 'google/protobuf/util/internal/datapiece.cc', 'google/protobuf/util/field_mask_util.cc', 'google/protobuf/util/field_comparator.cc', 'google/protobuf/unknown_field_set.cc', 'google/protobuf/type.pb.cc', 'google/protobuf/timestamp.pb.cc', 'google/protobuf/text_format.cc', 'google/protobuf/stubs/substitute.cc', 'google/protobuf/stubs/mathlimits.cc', 'google/protobuf/struct.pb.cc', 'google/protobuf/source_context.pb.cc', 'google/protobuf/service.cc', 'google/protobuf/reflection_ops.cc', 'google/protobuf/message.cc', 'google/protobuf/map_field.cc', 'google/protobuf/io/zero_copy_stream_impl.cc', 'google/protobuf/io/tokenizer.cc', 'google/protobuf/io/strtod.cc', 'google/protobuf/io/printer.cc', 'google/protobuf/io/gzip_stream.cc', 'google/protobuf/generated_message_reflection.cc', 'google/protobuf/field_mask.pb.cc', 'google/protobuf/extension_set_heavy.cc', 'google/protobuf/empty.pb.cc', 'google/protobuf/dynamic_message.cc', 'google/protobuf/duration.pb.cc', 'google/protobuf/descriptor_database.cc', 'google/protobuf/descriptor.pb.cc', 'google/protobuf/descriptor.cc', 'google/protobuf/compiler/parser.cc', 'google/protobuf/compiler/importer.cc', 'google/protobuf/api.pb.cc', 'google/protobuf/any.pb.cc', 'google/protobuf/any.cc', 'google/protobuf/wire_format_lite.cc', 'google/protobuf/stubs/time.cc', 'google/protobuf/stubs/strutil.cc', 'google/protobuf/stubs/structurally_valid.cc', 'google/protobuf/stubs/stringprintf.cc', 'google/protobuf/stubs/stringpiece.cc', 'google/protobuf/stubs/statusor.cc', 'google/protobuf/stubs/status.cc', 'google/protobuf/stubs/once.cc', 'google/protobuf/stubs/int128.cc', 'google/protobuf/stubs/common.cc', 'google/protobuf/stubs/bytestream.cc', 'google/protobuf/stubs/atomicops_internals_x86_msvc.cc', 'google/protobuf/stubs/atomicops_internals_x86_gcc.cc', 'google/protobuf/repeated_field.cc', 'google/protobuf/message_lite.cc', 'google/protobuf/io/zero_copy_stream_impl_lite.cc', 'google/protobuf/io/zero_copy_stream.cc', 'google/protobuf/io/coded_stream.cc', 'google/protobuf/generated_message_util.cc', 'google/protobuf/extension_set.cc', 'google/protobuf/arenastring.cc', 'google/protobuf/arena.cc', 'google/protobuf/compiler/js/embed.cc']
 PROTO_FILES=['google/protobuf/wrappers.proto', 'google/protobuf/type.proto', 'google/protobuf/timestamp.proto', 'google/protobuf/struct.proto', 'google/protobuf/source_context.proto', 'google/protobuf/field_mask.proto', 'google/protobuf/empty.proto', 'google/protobuf/duration.proto', 'google/protobuf/descriptor.proto', 'google/protobuf/compiler/plugin.proto', 'google/protobuf/api.proto', 'google/protobuf/any.proto']
 
 CC_INCLUDE='third_party/protobuf/src'
diff --git a/tools/distrib/python/grpcio_tools/setup.py b/tools/distrib/python/grpcio_tools/setup.py
index 502d7ef..ed27f1f 100644
--- a/tools/distrib/python/grpcio_tools/setup.py
+++ b/tools/distrib/python/grpcio_tools/setup.py
@@ -157,11 +157,28 @@
     plugin_sources = [os.path.join('grpc_tools', '_protoc_compiler.pyx')]
   else:
     plugin_sources = [os.path.join('grpc_tools', '_protoc_compiler.cpp')]
+
   plugin_sources += [
     os.path.join('grpc_tools', 'main.cc'),
-    os.path.join('grpc_root', 'src', 'compiler', 'python_generator.cc')] + [
-    os.path.join(CC_INCLUDE, cc_file)
-    for cc_file in CC_FILES]
+    os.path.join('grpc_root', 'src', 'compiler', 'python_generator.cc')]
+
+  #HACK: Substitute the embed.cc, which is a JS to C++
+  #      preprocessor with the generated code.
+  #      The generated code should not be material
+  #      to the parts of protoc we use (it affects
+  #      the JavaScript code generator, supposedly),
+  #      but we need to be cautious about it.
+  cc_files_clone = list(CC_FILES)
+  embed_cc_file = os.path.normpath('google/protobuf/compiler/js/embed.cc')
+  well_known_types_file = os.path.normpath(
+      'google/protobuf/compiler/js/well_known_types_embed.cc')
+  if embed_cc_file in cc_files_clone:
+    cc_files_clone.remove(embed_cc_file)
+  if well_known_types_file in cc_files_clone:
+    cc_files_clone.remove(well_known_types_file)
+    plugin_sources += [os.path.join('grpc_tools', 'protobuf_generated_well_known_types_embed.cc')]
+  plugin_sources += [os.path.join(CC_INCLUDE, cc_file) for cc_file in cc_files_clone]
+
   plugin_ext = extension.Extension(
       name='grpc_tools._protoc_compiler',
       sources=plugin_sources,
@@ -190,7 +207,7 @@
   ext_modules=extension_modules(),
   packages=setuptools.find_packages('.'),
   install_requires=[
-    'protobuf>=3.0.0',
+    'protobuf>=3.2.0',
     'grpcio>={version}'.format(version=grpc_version.VERSION),
   ],
   package_data=package_data(),
diff --git a/tools/dockerfile/bazel/Dockerfile b/tools/dockerfile/bazel/Dockerfile
deleted file mode 100644
index 2a80a4d..0000000
--- a/tools/dockerfile/bazel/Dockerfile
+++ /dev/null
@@ -1,52 +0,0 @@
-# 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.
-
-FROM ubuntu:wily
-RUN apt-get update
-RUN apt-get -y install software-properties-common python-software-properties
-RUN add-apt-repository ppa:webupd8team/java
-RUN apt-get update
-RUN apt-get -y install \
-	vim            \
-	wget           \
-	openjdk-8-jdk  \
-	pkg-config     \
-	zip            \
-	g++            \
-	zlib1g-dev     \
-	unzip          \
-	git
-
-RUN git clone https://github.com/bazelbuild/bazel.git /bazel
-RUN cd /bazel && ./compile.sh
-
-RUN ln -s /bazel/output/bazel /bin/
-
-# ensure the installation has been extracted
-RUN bazel
diff --git a/tools/dockerfile/grpc_artifact_linux_x64/Dockerfile b/tools/dockerfile/grpc_artifact_linux_x64/Dockerfile
index 669e355..3479944 100644
--- a/tools/dockerfile/grpc_artifact_linux_x64/Dockerfile
+++ b/tools/dockerfile/grpc_artifact_linux_x64/Dockerfile
@@ -76,7 +76,7 @@
 
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0
 
 
 ##################
diff --git a/tools/dockerfile/grpc_artifact_linux_x86/Dockerfile b/tools/dockerfile/grpc_artifact_linux_x86/Dockerfile
index 860b8f4..75d156f 100644
--- a/tools/dockerfile/grpc_artifact_linux_x86/Dockerfile
+++ b/tools/dockerfile/grpc_artifact_linux_x86/Dockerfile
@@ -76,7 +76,7 @@
 
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0
 
 
 ##################
diff --git a/tools/dockerfile/interoptest/grpc_interop_csharp/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_csharp/Dockerfile
index 087cc4e..14a2468 100644
--- a/tools/dockerfile/interoptest/grpc_interop_csharp/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_csharp/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #================
 # C# dependencies
diff --git a/tools/dockerfile/interoptest/grpc_interop_csharpcoreclr/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_csharpcoreclr/Dockerfile
index efe6e39..9163982 100644
--- a/tools/dockerfile/interoptest/grpc_interop_csharpcoreclr/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_csharpcoreclr/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #================
 # C# dependencies
diff --git a/tools/dockerfile/interoptest/grpc_interop_cxx/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_cxx/Dockerfile
index aa77d5f..2d10e3f 100644
--- a/tools/dockerfile/interoptest/grpc_interop_cxx/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_cxx/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #=================
 # C++ dependencies
diff --git a/tools/dockerfile/interoptest/grpc_interop_go/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_go/Dockerfile
index 05e963d..d3bf071 100644
--- a/tools/dockerfile/interoptest/grpc_interop_go/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_go/Dockerfile
@@ -45,7 +45,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 # Define the default command.
 CMD ["bash"]
diff --git a/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile
index 3a5e15d..66d9b4f 100644
--- a/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile
@@ -45,7 +45,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 RUN pip install twisted h2
 
diff --git a/tools/dockerfile/interoptest/grpc_interop_java/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_java/Dockerfile
index b5fe54f..2023467 100644
--- a/tools/dockerfile/interoptest/grpc_interop_java/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_java/Dockerfile
@@ -60,7 +60,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 
 # Trigger download of as many Gradle artifacts as possible.
diff --git a/tools/dockerfile/interoptest/grpc_interop_node/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_node/Dockerfile
index d9a7501..9945260 100644
--- a/tools/dockerfile/interoptest/grpc_interop_node/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_node/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #==================
 # Node dependencies
diff --git a/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile
index 10a8891..94c1707 100644
--- a/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
diff --git a/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
index dae64e5..679c8ff 100644
--- a/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #==================
 # Ruby dependencies
diff --git a/tools/dockerfile/stress_test/grpc_interop_stress_csharp/Dockerfile b/tools/dockerfile/stress_test/grpc_interop_stress_csharp/Dockerfile
index 3288253..cd1e934 100644
--- a/tools/dockerfile/stress_test/grpc_interop_stress_csharp/Dockerfile
+++ b/tools/dockerfile/stress_test/grpc_interop_stress_csharp/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
diff --git a/tools/dockerfile/stress_test/grpc_interop_stress_cxx/Dockerfile b/tools/dockerfile/stress_test/grpc_interop_stress_cxx/Dockerfile
index e082da6..d0f66d9 100644
--- a/tools/dockerfile/stress_test/grpc_interop_stress_cxx/Dockerfile
+++ b/tools/dockerfile/stress_test/grpc_interop_stress_cxx/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
diff --git a/tools/dockerfile/stress_test/grpc_interop_stress_go/Dockerfile b/tools/dockerfile/stress_test/grpc_interop_stress_go/Dockerfile
index 1e2b7d8..bbf7de7 100644
--- a/tools/dockerfile/stress_test/grpc_interop_stress_go/Dockerfile
+++ b/tools/dockerfile/stress_test/grpc_interop_stress_go/Dockerfile
@@ -47,7 +47,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 # Using login shell removes Go from path, so we add it.
 RUN ln -s /usr/local/go/bin/go /usr/local/bin
diff --git a/tools/dockerfile/stress_test/grpc_interop_stress_java/Dockerfile b/tools/dockerfile/stress_test/grpc_interop_stress_java/Dockerfile
index 0c17ff5..229ea46 100644
--- a/tools/dockerfile/stress_test/grpc_interop_stress_java/Dockerfile
+++ b/tools/dockerfile/stress_test/grpc_interop_stress_java/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
diff --git a/tools/dockerfile/stress_test/grpc_interop_stress_node/Dockerfile b/tools/dockerfile/stress_test/grpc_interop_stress_node/Dockerfile
index 0594f69..5fd0bc0 100644
--- a/tools/dockerfile/stress_test/grpc_interop_stress_node/Dockerfile
+++ b/tools/dockerfile/stress_test/grpc_interop_stress_node/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #==================
 # Node dependencies
diff --git a/tools/dockerfile/stress_test/grpc_interop_stress_php/Dockerfile b/tools/dockerfile/stress_test/grpc_interop_stress_php/Dockerfile
index 0fe9c15..b5198b4 100644
--- a/tools/dockerfile/stress_test/grpc_interop_stress_php/Dockerfile
+++ b/tools/dockerfile/stress_test/grpc_interop_stress_php/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #==================
 # Ruby dependencies
diff --git a/tools/dockerfile/stress_test/grpc_interop_stress_python/Dockerfile b/tools/dockerfile/stress_test/grpc_interop_stress_python/Dockerfile
index 20d2d3f..8e1de51 100644
--- a/tools/dockerfile/stress_test/grpc_interop_stress_python/Dockerfile
+++ b/tools/dockerfile/stress_test/grpc_interop_stress_python/Dockerfile
@@ -93,7 +93,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 
 RUN pip install coverage
diff --git a/tools/dockerfile/stress_test/grpc_interop_stress_ruby/Dockerfile b/tools/dockerfile/stress_test/grpc_interop_stress_ruby/Dockerfile
index f459153..9d291aa 100644
--- a/tools/dockerfile/stress_test/grpc_interop_stress_ruby/Dockerfile
+++ b/tools/dockerfile/stress_test/grpc_interop_stress_ruby/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
diff --git a/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile b/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
index efe6e39..9163982 100644
--- a/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
+++ b/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #================
 # C# dependencies
diff --git a/tools/dockerfile/test/csharp_jessie_x64/Dockerfile b/tools/dockerfile/test/csharp_jessie_x64/Dockerfile
index 087cc4e..14a2468 100644
--- a/tools/dockerfile/test/csharp_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/csharp_jessie_x64/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #================
 # C# dependencies
diff --git a/tools/dockerfile/test/cxx_jessie_x64/Dockerfile b/tools/dockerfile/test/cxx_jessie_x64/Dockerfile
index e968a0f..4bb97c7 100644
--- a/tools/dockerfile/test/cxx_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/cxx_jessie_x64/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #=================
 # C++ dependencies
diff --git a/tools/dockerfile/test/cxx_jessie_x86/Dockerfile b/tools/dockerfile/test/cxx_jessie_x86/Dockerfile
index f985480..c4b710b 100644
--- a/tools/dockerfile/test/cxx_jessie_x86/Dockerfile
+++ b/tools/dockerfile/test/cxx_jessie_x86/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #=================
 # C++ dependencies
diff --git a/tools/dockerfile/test/cxx_ubuntu1404_x64/Dockerfile b/tools/dockerfile/test/cxx_ubuntu1404_x64/Dockerfile
index 2b3f4af..bd742df 100644
--- a/tools/dockerfile/test/cxx_ubuntu1404_x64/Dockerfile
+++ b/tools/dockerfile/test/cxx_ubuntu1404_x64/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #=================
 # C++ dependencies
diff --git a/tools/dockerfile/test/cxx_ubuntu1604_x64/Dockerfile b/tools/dockerfile/test/cxx_ubuntu1604_x64/Dockerfile
index 2d28227..bc46b30 100644
--- a/tools/dockerfile/test/cxx_ubuntu1604_x64/Dockerfile
+++ b/tools/dockerfile/test/cxx_ubuntu1604_x64/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #=================
 # C++ dependencies
diff --git a/tools/dockerfile/test/cxx_wheezy_x64/Dockerfile b/tools/dockerfile/test/cxx_wheezy_x64/Dockerfile
index f22fcac..f7d7f54 100644
--- a/tools/dockerfile/test/cxx_wheezy_x64/Dockerfile
+++ b/tools/dockerfile/test/cxx_wheezy_x64/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #=================
 # C++ dependencies
diff --git a/tools/dockerfile/test/fuzzer/Dockerfile b/tools/dockerfile/test/fuzzer/Dockerfile
index bd04f07..b398b70 100644
--- a/tools/dockerfile/test/fuzzer/Dockerfile
+++ b/tools/dockerfile/test/fuzzer/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #=================
 # C++ dependencies
diff --git a/tools/dockerfile/test/multilang_jessie_x64/Dockerfile b/tools/dockerfile/test/multilang_jessie_x64/Dockerfile
index 2540b52..5d0c168 100644
--- a/tools/dockerfile/test/multilang_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/multilang_jessie_x64/Dockerfile
@@ -133,7 +133,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
diff --git a/tools/dockerfile/test/node_jessie_x64/Dockerfile b/tools/dockerfile/test/node_jessie_x64/Dockerfile
index 7f93933..4595aa6 100644
--- a/tools/dockerfile/test/node_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/node_jessie_x64/Dockerfile
@@ -87,7 +87,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #==================
 # Node dependencies
diff --git a/tools/dockerfile/test/php7_jessie_x64/Dockerfile b/tools/dockerfile/test/php7_jessie_x64/Dockerfile
index 2213389..0e2c103 100644
--- a/tools/dockerfile/test/php7_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/php7_jessie_x64/Dockerfile
@@ -88,7 +88,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
diff --git a/tools/dockerfile/test/php_jessie_x64/Dockerfile b/tools/dockerfile/test/php_jessie_x64/Dockerfile
index 17ea36b..c6f3dde 100644
--- a/tools/dockerfile/test/php_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/php_jessie_x64/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #=================
 # PHP dependencies
diff --git a/tools/dockerfile/test/python_jessie_x64/Dockerfile b/tools/dockerfile/test/python_jessie_x64/Dockerfile
index 10a8891..94c1707 100644
--- a/tools/dockerfile/test/python_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/python_jessie_x64/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
diff --git a/tools/dockerfile/test/python_pyenv_x64/Dockerfile b/tools/dockerfile/test/python_pyenv_x64/Dockerfile
index ecd785a..105f06e 100644
--- a/tools/dockerfile/test/python_pyenv_x64/Dockerfile
+++ b/tools/dockerfile/test/python_pyenv_x64/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 # Install dependencies for pyenv
 RUN apt-get update && apt-get install -y \
diff --git a/tools/dockerfile/test/ruby_jessie_x64/Dockerfile b/tools/dockerfile/test/ruby_jessie_x64/Dockerfile
index dae64e5..679c8ff 100644
--- a/tools/dockerfile/test/ruby_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/ruby_jessie_x64/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #==================
 # Ruby dependencies
diff --git a/tools/dockerfile/test/sanity/Dockerfile b/tools/dockerfile/test/sanity/Dockerfile
index 811384f..0da2a19 100644
--- a/tools/dockerfile/test/sanity/Dockerfile
+++ b/tools/dockerfile/test/sanity/Dockerfile
@@ -76,7 +76,7 @@
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0
 
 #========================
 # Sanity test dependencies
diff --git a/tools/jenkins/run_full_performance_released.sh b/tools/jenkins/run_full_performance_released.sh
new file mode 100755
index 0000000..ae2289e
--- /dev/null
+++ b/tools/jenkins/run_full_performance_released.sh
@@ -0,0 +1,73 @@
+#!/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.
+#
+# A frozen version of run_full_performance.sh that runs full performance test
+# suite for the latest released stable version of gRPC.
+set -ex
+
+# Enter the gRPC repo root
+cd $(dirname $0)/../..
+
+# run 8core client vs 8core server
+tools/run_tests/run_performance_tests.py \
+    -l c++ csharp node ruby java python go node_express \
+    --netperf \
+    --category scalable \
+    --bq_result_table performance_released.performance_experiment \
+    --remote_worker_host grpc-performance-server-8core grpc-performance-client-8core grpc-performance-client2-8core \
+    --xml_report report_8core.xml \
+    || EXIT_CODE=1
+
+# prevent pushing leftover build files to remote hosts in the next step.
+git clean -fdxq --exclude='report*.xml'
+
+# scalability with 32cores (and upload to a different BQ table)
+tools/run_tests/run_performance_tests.py \
+    -l c++ java csharp go \
+    --netperf \
+    --category scalable \
+    --bq_result_table performance_released.performance_experiment_32core \
+    --remote_worker_host grpc-performance-server-32core grpc-performance-client-32core grpc-performance-client2-32core \
+    --xml_report report_32core.xml \
+    || EXIT_CODE=1
+
+# prevent pushing leftover build files to remote hosts in the next step.
+git clean -fdxq --exclude='report*.xml'
+
+# selected scenarios on Windows
+tools/run_tests/run_performance_tests.py \
+    -l csharp \
+    --category scalable \
+    --bq_result_table performance_released.performance_experiment_windows \
+    --remote_worker_host grpc-performance-windows1 grpc-performance-windows2 \
+    --xml_report report_windows.xml \
+    || EXIT_CODE=1
+
+exit $EXIT_CODE
diff --git a/tools/run_tests/generated/sources_and_headers.json b/tools/run_tests/generated/sources_and_headers.json
index 0a0cba3..8a31a6e 100644
--- a/tools/run_tests/generated/sources_and_headers.json
+++ b/tools/run_tests/generated/sources_and_headers.json
@@ -1667,6 +1667,23 @@
     "headers": [], 
     "is_filegroup": false, 
     "language": "c", 
+    "name": "parse_address_test", 
+    "src": [
+      "test/core/client_channel/parse_address_test.c"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "is_filegroup": false, 
+    "language": "c", 
     "name": "percent_decode_fuzzer", 
     "src": [
       "test/core/slice/percent_decode_fuzzer.c"
@@ -2042,6 +2059,23 @@
     "headers": [], 
     "is_filegroup": false, 
     "language": "c", 
+    "name": "stream_owned_slice_test", 
+    "src": [
+      "test/core/transport/stream_owned_slice_test.c"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "is_filegroup": false, 
+    "language": "c", 
     "name": "tcp_client_posix_test", 
     "src": [
       "test/core/iomgr/tcp_client_posix_test.c"
diff --git a/tools/run_tests/generated/tests.json b/tools/run_tests/generated/tests.json
index f24694e..402dabc 100644
--- a/tools/run_tests/generated/tests.json
+++ b/tools/run_tests/generated/tests.json
@@ -1733,6 +1733,28 @@
     "flaky": false, 
     "gtest": false, 
     "language": "c", 
+    "name": "parse_address_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ]
+  }, 
+  {
+    "args": [], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "gtest": false, 
+    "language": "c", 
     "name": "percent_encoding_test", 
     "platforms": [
       "linux", 
@@ -2120,6 +2142,28 @@
     "ci_platforms": [
       "linux", 
       "mac", 
+      "posix", 
+      "windows"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "gtest": false, 
+    "language": "c", 
+    "name": "stream_owned_slice_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ]
+  }, 
+  {
+    "args": [], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.5, 
@@ -80643,6 +80687,28 @@
   }, 
   {
     "args": [
+      "test/core/end2end/fuzzers/api_fuzzer_corpus/clusterfuzz-testcase-6520142139752448"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [
+      "tsan"
+    ], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "api_fuzzer_one_entry", 
+    "platforms": [
+      "linux"
+    ], 
+    "uses_polling": false
+  }, 
+  {
+    "args": [
       "test/core/end2end/fuzzers/api_fuzzer_corpus/crash-0597bbdd657fa4ed14443994c9147a1a7bbc205f"
     ], 
     "ci_platforms": [
diff --git a/tools/run_tests/helper_scripts/pre_build_csharp.bat b/tools/run_tests/helper_scripts/pre_build_csharp.bat
index f37f63b..99df1c6 100644
--- a/tools/run_tests/helper_scripts/pre_build_csharp.bat
+++ b/tools/run_tests/helper_scripts/pre_build_csharp.bat
@@ -89,18 +89,6 @@
   %NUGET% restore -PackagesDirectory ../packages || goto :error
   cd ..
 
-  cd Grpc.IntegrationTesting.Client || goto :error
-  %NUGET% restore -PackagesDirectory ../packages || goto :error
-  cd ..
-
-  cd Grpc.IntegrationTesting.QpsWorker || goto :error
-  %NUGET% restore -PackagesDirectory ../packages || goto :error
-  cd ..
-
-  cd Grpc.IntegrationTesting.StressClient || goto :error
-  %NUGET% restore -PackagesDirectory ../packages || goto :error
-  cd ..
-
   cd Grpc.IntegrationTesting || goto :error
   %NUGET% restore -PackagesDirectory ../packages || goto :error
 
diff --git a/tools/run_tests/helper_scripts/pre_build_csharp.sh b/tools/run_tests/helper_scripts/pre_build_csharp.sh
index 1f80855..d7665e1 100755
--- a/tools/run_tests/helper_scripts/pre_build_csharp.sh
+++ b/tools/run_tests/helper_scripts/pre_build_csharp.sh
@@ -73,18 +73,6 @@
   nuget restore -PackagesDirectory ../packages
   cd ..
 
-  cd Grpc.IntegrationTesting.Client
-  nuget restore -PackagesDirectory ../packages
-  cd ..
-
-  cd Grpc.IntegrationTesting.QpsWorker
-  nuget restore -PackagesDirectory ../packages
-  cd ..
-
-  cd Grpc.IntegrationTesting.StressClient
-  nuget restore -PackagesDirectory ../packages
-  cd ..
-
   cd Grpc.IntegrationTesting
   nuget restore -PackagesDirectory ../packages
   cd ..
diff --git a/tools/run_tests/performance/scenario_config.py b/tools/run_tests/performance/scenario_config.py
index 865125f..830b8c0 100644
--- a/tools/run_tests/performance/scenario_config.py
+++ b/tools/run_tests/performance/scenario_config.py
@@ -413,11 +413,12 @@
         client_type='ASYNC_CLIENT', server_type='async_server',
         client_language='c++')
 
-    yield _ping_pong_scenario(
-        'node_protobuf_async_unary_qps_unconstrained', rpc_type='UNARY',
-        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
-        unconstrained_client='async',
-        categories=[SCALABLE, SMOKETEST])
+    # TODO(murgatroid99): fix bugs with this scenario and re-enable it
+    # yield _ping_pong_scenario(
+    #     'node_protobuf_async_unary_qps_unconstrained', rpc_type='UNARY',
+    #     client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
+    #     unconstrained_client='async',
+    #     categories=[SCALABLE, SMOKETEST])
 
     # TODO(jtattermusch): make this scenario work
     #yield _ping_pong_scenario(
diff --git a/tools/run_tests/run_performance_tests.py b/tools/run_tests/run_performance_tests.py
index 7c04d22..ee4102c 100755
--- a/tools/run_tests/run_performance_tests.py
+++ b/tools/run_tests/run_performance_tests.py
@@ -101,7 +101,7 @@
     user_at_host = '%s@%s' % (_REMOTE_HOST_USERNAME, remote_host)
     ssh_cmd = ['ssh']
     cmdline = ['timeout', '%s' % (worker_timeout + 30)] + cmdline
-    ssh_cmd.extend([str(user_at_host), 'cd ~/performance_workspace/grpc/ && %s' % ' '.join(cmdline)])
+    ssh_cmd.extend([str(user_at_host), 'cd ~/performance_workspace/grpc/ && tools/run_tests/start_port_server.py && %s' % ' '.join(cmdline)])
     cmdline = ssh_cmd
 
   jobspec = jobset.JobSpec(
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index d498340..61de2c9 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -1465,10 +1465,9 @@
       sample_size = int(num_jobs * args.sample_percent/100.0)
       massaged_one_run = random.sample(massaged_one_run, sample_size)
       if not isclose(args.sample_percent, 100.0):
+        assert args.runs_per_test == 1, "Can't do sampling (-p) over multiple runs (-n)."
         print("Running %d tests out of %d (~%d%%)" %
               (sample_size, num_jobs, args.sample_percent))
-      else:
-        assert args.runs_per_test == 1, "Can't do sampling (-p) over multiple runs (-n)."
     if infinite_runs:
       assert len(massaged_one_run) > 0, 'Must have at least one test for a -n inf run'
     runs_sequence = (itertools.repeat(massaged_one_run) if infinite_runs
diff --git a/tools/run_tests/run_tests_matrix.py b/tools/run_tests/run_tests_matrix.py
index 5f5df70..4742245 100755
--- a/tools/run_tests/run_tests_matrix.py
+++ b/tools/run_tests/run_tests_matrix.py
@@ -49,6 +49,9 @@
 # Number of jobs assigned to each run_tests.py instance
 _DEFAULT_INNER_JOBS = 2
 
+# report suffix is important for reports to get picked up by internal CI
+_REPORT_SUFFIX = 'sponge_log.xml'
+
 
 def _docker_jobspec(name, runtests_args=[], inner_jobs=_DEFAULT_INNER_JOBS):
   """Run a single instance of run_tests.py in a docker container"""
@@ -57,7 +60,7 @@
                    '--use_docker',
                    '-t',
                    '-j', str(inner_jobs),
-                   '-x', 'report_%s.xml' % name,
+                   '-x', 'report_%s_%s' % (name, _REPORT_SUFFIX),
                    '--report_suite_name', '%s' % name] + runtests_args,
           shortname='run_tests_%s' % name,
           timeout_seconds=_RUNTESTS_TIMEOUT)
@@ -74,7 +77,7 @@
                    'tools/run_tests/helper_scripts/run_tests_in_workspace.sh',
                    '-t',
                    '-j', str(inner_jobs),
-                   '-x', '../report_%s.xml' % name,
+                   '-x', '../report_%s_%s' % (name, _REPORT_SUFFIX),
                    '--report_suite_name', '%s' % name] + runtests_args,
           environ=env,
           shortname='run_tests_%s' % name,
@@ -415,7 +418,7 @@
     skipped_results = jobset.run(skipped_jobs,
                                  skip_jobs=True)
     resultset.update(skipped_results)
-  report_utils.render_junit_xml_report(resultset, 'report.xml',
+  report_utils.render_junit_xml_report(resultset, 'report_%s' % _REPORT_SUFFIX,
                                        suite_name='aggregate_tests')
 
   if num_failures == 0:
diff --git a/tools/run_tests/sanity/check_submodules.sh b/tools/run_tests/sanity/check_submodules.sh
index cfe4e27..3c5ba16 100755
--- a/tools/run_tests/sanity/check_submodules.sh
+++ b/tools/run_tests/sanity/check_submodules.sh
@@ -46,7 +46,7 @@
  886e7d75368e3f4fab3f4d0d3584e4abfc557755 third_party/boringssl-with-bazel (version_for_cocoapods_7.0-857-g886e7d7)
  30dbc81fb5ffdc98ea9b14b1918bfe4e8779b26e third_party/gflags (v2.2.0)
  c99458533a9b4c743ed51537e25989ea55944908 third_party/googletest (release-1.7.0)
- a428e42072765993ff674fda72863c9f1aa2d268 third_party/protobuf (v3.1.0-alpha-1)
+ 593e917c176b5bc5aafa57bf9f6030d749d91cd5 third_party/protobuf (v3.1.0-alpha-1-326-g593e917)
  bcad91771b7f0bff28a1cac1981d7ef2b9bcef3c third_party/thrift (bcad917)
  50893291621658f355bc5b4d450a8d06a563053d third_party/zlib (v1.2.8)
 EOF
diff --git a/vsprojects/buildtests_c.sln b/vsprojects/buildtests_c.sln
index 623de48..ad7bffd 100644
--- a/vsprojects/buildtests_c.sln
+++ b/vsprojects/buildtests_c.sln
@@ -1264,6 +1264,17 @@
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "parse_address_test", "vcxproj\test\parse_address_test\parse_address_test.vcxproj", "{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}"
+	ProjectSection(myProperties) = preProject
+        	lib = "False"
+	EndProjectSection
+	ProjectSection(ProjectDependencies) = postProject
+		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
+		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
+		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
+		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
+	EndProjectSection
+EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "percent_encoding_test", "vcxproj\test\percent_encoding_test\percent_encoding_test.vcxproj", "{CCFC6A58-623D-9013-BFEB-C809809E2429}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -1454,6 +1465,17 @@
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "stream_owned_slice_test", "vcxproj\test\stream_owned_slice_test\stream_owned_slice_test.vcxproj", "{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}"
+	ProjectSection(myProperties) = preProject
+        	lib = "False"
+	EndProjectSection
+	ProjectSection(ProjectDependencies) = postProject
+		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
+		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
+		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
+		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
+	EndProjectSection
+EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "tcp_client_uv_test", "vcxproj\test\tcp_client_uv_test\tcp_client_uv_test.vcxproj", "{9814D850-F3BB-8C7A-4C78-2751C1E272F4}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -3515,6 +3537,22 @@
 		{A66AC548-E2B9-74CD-293C-43526EE51DCE}.Release-DLL|Win32.Build.0 = Release|Win32
 		{A66AC548-E2B9-74CD-293C-43526EE51DCE}.Release-DLL|x64.ActiveCfg = Release|x64
 		{A66AC548-E2B9-74CD-293C-43526EE51DCE}.Release-DLL|x64.Build.0 = Release|x64
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Debug|Win32.ActiveCfg = Debug|Win32
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Debug|x64.ActiveCfg = Debug|x64
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Release|Win32.ActiveCfg = Release|Win32
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Release|x64.ActiveCfg = Release|x64
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Debug|Win32.Build.0 = Debug|Win32
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Debug|x64.Build.0 = Debug|x64
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Release|Win32.Build.0 = Release|Win32
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Release|x64.Build.0 = Release|x64
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Debug-DLL|x64.Build.0 = Debug|x64
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Release-DLL|Win32.Build.0 = Release|Win32
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Release-DLL|x64.ActiveCfg = Release|x64
+		{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}.Release-DLL|x64.Build.0 = Release|x64
 		{CCFC6A58-623D-9013-BFEB-C809809E2429}.Debug|Win32.ActiveCfg = Debug|Win32
 		{CCFC6A58-623D-9013-BFEB-C809809E2429}.Debug|x64.ActiveCfg = Debug|x64
 		{CCFC6A58-623D-9013-BFEB-C809809E2429}.Release|Win32.ActiveCfg = Release|Win32
@@ -3787,6 +3825,22 @@
 		{21E2A241-9D48-02CD-92E4-4EEC98424CF5}.Release-DLL|Win32.Build.0 = Release|Win32
 		{21E2A241-9D48-02CD-92E4-4EEC98424CF5}.Release-DLL|x64.ActiveCfg = Release|x64
 		{21E2A241-9D48-02CD-92E4-4EEC98424CF5}.Release-DLL|x64.Build.0 = Release|x64
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Debug|Win32.ActiveCfg = Debug|Win32
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Debug|x64.ActiveCfg = Debug|x64
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Release|Win32.ActiveCfg = Release|Win32
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Release|x64.ActiveCfg = Release|x64
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Debug|Win32.Build.0 = Debug|Win32
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Debug|x64.Build.0 = Debug|x64
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Release|Win32.Build.0 = Release|Win32
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Release|x64.Build.0 = Release|x64
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Debug-DLL|x64.Build.0 = Debug|x64
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Release-DLL|Win32.Build.0 = Release|Win32
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Release-DLL|x64.ActiveCfg = Release|x64
+		{D5A20C05-D9B2-970B-8429-94BC3F58D1C4}.Release-DLL|x64.Build.0 = Release|x64
 		{9814D850-F3BB-8C7A-4C78-2751C1E272F4}.Debug|Win32.ActiveCfg = Debug|Win32
 		{9814D850-F3BB-8C7A-4C78-2751C1E272F4}.Debug|x64.ActiveCfg = Debug|x64
 		{9814D850-F3BB-8C7A-4C78-2751C1E272F4}.Release|Win32.ActiveCfg = Release|Win32
diff --git a/vsprojects/vcxproj/test/parse_address_test/parse_address_test.vcxproj b/vsprojects/vcxproj/test/parse_address_test/parse_address_test.vcxproj
new file mode 100644
index 0000000..1704670
--- /dev/null
+++ b/vsprojects/vcxproj/test/parse_address_test/parse_address_test.vcxproj
@@ -0,0 +1,199 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\1.0.204.1.props')" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{EDEA8257-AEA8-1B0A-F95B-8D6CD7286463}</ProjectGuid>
+    <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
+    <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
+  </PropertyGroup>
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index 0000000..e4e446d
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+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" />
+  </Target>
+</Project>
+
diff --git a/vsprojects/vcxproj/test/stream_owned_slice_test/stream_owned_slice_test.vcxproj.filters b/vsprojects/vcxproj/test/stream_owned_slice_test/stream_owned_slice_test.vcxproj.filters
new file mode 100644
index 0000000..9a41202
--- /dev/null
+++ b/vsprojects/vcxproj/test/stream_owned_slice_test/stream_owned_slice_test.vcxproj.filters
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\test\core\transport\stream_owned_slice_test.c">
+      <Filter>test\core\transport</Filter>
+    </ClCompile>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Filter Include="test">
+      <UniqueIdentifier>{5606d0c3-ce6d-0d92-aaa6-4cba3360af30}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="test\core">
+      <UniqueIdentifier>{c89700dc-cc90-bd03-00e7-36ee75d20c07}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="test\core\transport">
+      <UniqueIdentifier>{faebe48f-9338-a5a4-439d-9f307d0b843b}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+</Project>
+