Introduce channel arg to disable authority filter

include/grpc/impl/codegen/grpc_types.h

@@ -333,6 +333,9 @@ typedef struct {
 /** Channel arg that carries the bridged objective c object for custom metrics
  * logging filter. */
 #define GRPC_ARG_MOBILE_LOG_CONFIG "grpc.mobile_log_config"
+/** If non-zero, client authority filter is disabled for the channel */
+#define GRPC_ARG_DISABLE_CLIENT_AUTHORITY_FILTER \
+  "grpc.disable_client_authority_filter"
 /** \} */
 
 /** Result of a grpc call. If the caller satisfies the prerequisites of a

src/core/ext/filters/http/client_authority_filter.cc

@@ -129,6 +129,17 @@ const grpc_channel_filter grpc_client_authority_filter = {
 
 static bool add_client_authority_filter(grpc_channel_stack_builder* builder,
                                         void* arg) {
+  const grpc_channel_args* channel_args =
+      grpc_channel_stack_builder_get_channel_arguments(builder);
+  const grpc_arg* disable_client_authority_filter_arg = grpc_channel_args_find(
+      channel_args, GRPC_ARG_DISABLE_CLIENT_AUTHORITY_FILTER);
+  if (disable_client_authority_filter_arg != nullptr) {
+    const bool is_client_authority_filter_disabled =
+        grpc_channel_arg_get_bool(disable_client_authority_filter_arg, false);
+    if (is_client_authority_filter_disabled) {
+      return true;
+    }
+  }
   return grpc_channel_stack_builder_prepend_filter(
       builder, static_cast<const grpc_channel_filter*>(arg), nullptr, nullptr);
 }

src/objective-c/GRPCClient/private/GRPCHost.m

@@ -192,7 +192,7 @@ static NSMutableDictionary *kHostCache;
   return YES;
 }
 
-- (NSDictionary *)channelArgs {
+- (NSDictionary *)channelArgsUsingCronet:(BOOL)useCronet {
   NSMutableDictionary *args = [NSMutableDictionary dictionary];
 
   // TODO(jcanizales): Add OS and device information (see
@@ -226,14 +226,19 @@ static NSMutableDictionary *kHostCache;
     args[@GRPC_ARG_MOBILE_LOG_CONFIG] = logConfig;
   }
 
+  if (useCronet) {
+    args[@GRPC_ARG_DISABLE_CLIENT_AUTHORITY_FILTER] = [NSNumber numberWithInt:1];
+  }
+
   return args;
 }
 
 - (GRPCChannel *)newChannel {
-  NSDictionary *args = [self channelArgs];
+  BOOL useCronet = NO;
 #ifdef GRPC_COMPILE_WITH_CRONET
-  BOOL useCronet = [GRPCCall isUsingCronet];
+  useCronet = [GRPCCall isUsingCronet];
 #endif
+  NSDictionary *args = [self channelArgsUsingCronet:useCronet];
   if (_secure) {
     GRPCChannel *channel;
     @synchronized(self) {

src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.mm

@@ -82,8 +82,14 @@ static void cronet_init_client_secure_fullstack(grpc_end2end_test_fixture *f,
                                                 grpc_channel_args *client_args,
                                                 stream_engine *cronetEngine) {
   fullstack_secure_fixture_data *ffd = (fullstack_secure_fixture_data *)f->fixture_data;
+  grpc_arg arg;
+  arg.key = const_cast<char*>(GRPC_ARG_DISABLE_CLIENT_AUTHORITY_FILTER);
+  arg.type = GRPC_ARG_INTEGER;
+  arg.value.integer = 1;
+  client_args = grpc_channel_args_copy_and_add(client_args, &arg, 1);
   f->client = grpc_cronet_secure_channel_create(cronetEngine, ffd->localaddr,
                                                 client_args, NULL);
+  grpc_channel_args_destroy(client_args);
   GPR_ASSERT(f->client != NULL);
 }
 

src/objective-c/tests/CronetUnitTests/CronetUnitTests.m

@@ -126,6 +126,14 @@ unsigned int parse_h2_length(const char *field) {
          ((unsigned int)(unsigned char)(field[2]));
 }
 
+grpc_channel_args *add_disable_client_authority_filter_args(grpc_channel_args *args) {
+  grpc_arg arg;
+  arg.key = const_cast<char*>(GRPC_ARG_DISABLE_CLIENT_AUTHORITY_FILTER);
+  arg.type = GRPC_ARG_INTEGER;
+  arg.value.integer = 1;
+  return grpc_channel_args_copy_and_add(args, &arg, 1);
+}
+
 - (void)testInternalError {
   grpc_call *c;
   grpc_slice request_payload_slice =
@@ -147,8 +155,10 @@ unsigned int parse_h2_length(const char *field) {
   gpr_join_host_port(&addr, "127.0.0.1", port);
   grpc_completion_queue *cq = grpc_completion_queue_create_for_next(NULL);
   stream_engine *cronetEngine = [Cronet getGlobalEngine];
+  grpc_channel_args *client_args = add_disable_client_authority_filter_args(NULL);
   grpc_channel *client =
-      grpc_cronet_secure_channel_create(cronetEngine, addr, NULL, NULL);
+      grpc_cronet_secure_channel_create(cronetEngine, addr, client_args, NULL);
+  grpc_channel_args_destroy(client_args);
 
   cq_verifier *cqv = cq_verifier_create(cq);
   grpc_op ops[6];
@@ -262,6 +272,8 @@ unsigned int parse_h2_length(const char *field) {
   arg.type = GRPC_ARG_INTEGER;
   arg.value.integer = useCoalescing ? 1 : 0;
   grpc_channel_args *args = grpc_channel_args_copy_and_add(NULL, &arg, 1);
+  args = add_disable_client_authority_filter_args(args);
+
   grpc_call *c;
   grpc_slice request_payload_slice =
       grpc_slice_from_copied_string("hello world");

src/objective-c/tests/Podfile

@@ -8,7 +8,6 @@ GRPC_LOCAL_SRC = '../../..'
 
 # Install the dependencies in the main target plus all test targets.
 %w(
-  Tests
   AllTests
   RxLibraryUnitTests
   InteropTestsRemote