Updated build.json, regenerated project files.
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 3f13b7b..1474d95 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -996,6 +996,20 @@
     ], 
     "headers": [], 
     "language": "c", 
+    "name": "udp_server_test", 
+    "src": [
+      "test/core/iomgr/udp_server_test.c"
+    ]
+  }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c", 
     "name": "uri_parser_test", 
     "src": [
       "test/core/client_config/uri_parser_test.c"
@@ -8759,6 +8773,7 @@
       "src/core/iomgr/tcp_server.h", 
       "src/core/iomgr/tcp_windows.h", 
       "src/core/iomgr/time_averaged_stats.h", 
+      "src/core/iomgr/udp_server.h", 
       "src/core/iomgr/wakeup_fd_pipe.h", 
       "src/core/iomgr/wakeup_fd_posix.h", 
       "src/core/json/json.h", 
@@ -8943,6 +8958,8 @@
       "src/core/iomgr/tcp_windows.h", 
       "src/core/iomgr/time_averaged_stats.c", 
       "src/core/iomgr/time_averaged_stats.h", 
+      "src/core/iomgr/udp_server.c", 
+      "src/core/iomgr/udp_server.h", 
       "src/core/iomgr/wakeup_fd_eventfd.c", 
       "src/core/iomgr/wakeup_fd_nospecial.c", 
       "src/core/iomgr/wakeup_fd_pipe.c", 
@@ -9207,6 +9224,7 @@
       "src/core/iomgr/tcp_server.h", 
       "src/core/iomgr/tcp_windows.h", 
       "src/core/iomgr/time_averaged_stats.h", 
+      "src/core/iomgr/udp_server.h", 
       "src/core/iomgr/wakeup_fd_pipe.h", 
       "src/core/iomgr/wakeup_fd_posix.h", 
       "src/core/json/json.h", 
@@ -9369,6 +9387,8 @@
       "src/core/iomgr/tcp_windows.h", 
       "src/core/iomgr/time_averaged_stats.c", 
       "src/core/iomgr/time_averaged_stats.h", 
+      "src/core/iomgr/udp_server.c", 
+      "src/core/iomgr/udp_server.h", 
       "src/core/iomgr/wakeup_fd_eventfd.c", 
       "src/core/iomgr/wakeup_fd_nospecial.c", 
       "src/core/iomgr/wakeup_fd_pipe.c",