| /* |
| * |
| * Copyright 2017 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include "src/core/lib/channel/channel_stack_builder.h" |
| |
| #include <limits.h> |
| #include <string.h> |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.h> |
| |
| #include "src/core/lib/slice/slice_internal.h" |
| #include "src/core/lib/surface/channel_init.h" |
| #include "test/core/util/test_config.h" |
| |
| static grpc_error* channel_init_func(grpc_channel_element* elem, |
| grpc_channel_element_args* args) { |
| return GRPC_ERROR_NONE; |
| } |
| |
| static grpc_error* call_init_func(grpc_call_element* elem, |
| const grpc_call_element_args* args) { |
| return GRPC_ERROR_NONE; |
| } |
| |
| static void channel_destroy_func(grpc_channel_element* elem) {} |
| |
| static void call_destroy_func(grpc_call_element* elem, |
| const grpc_call_final_info* final_info, |
| grpc_closure* ignored) {} |
| |
| static void call_func(grpc_call_element* elem, |
| grpc_transport_stream_op_batch* op) {} |
| |
| static void channel_func(grpc_channel_element* elem, grpc_transport_op* op) { |
| if (op->disconnect_with_error != GRPC_ERROR_NONE) { |
| GRPC_ERROR_UNREF(op->disconnect_with_error); |
| } |
| GRPC_CLOSURE_SCHED(op->on_consumed, GRPC_ERROR_NONE); |
| } |
| |
| bool g_replacement_fn_called = false; |
| bool g_original_fn_called = false; |
| void set_arg_once_fn(grpc_channel_stack* channel_stack, |
| grpc_channel_element* elem, void* arg) { |
| bool* called = static_cast<bool*>(arg); |
| // Make sure this function is only called once per arg. |
| GPR_ASSERT(*called == false); |
| *called = true; |
| } |
| |
| static void test_channel_stack_builder_filter_replace(void) { |
| grpc_channel* channel = |
| grpc_insecure_channel_create("target name isn't used", nullptr, nullptr); |
| GPR_ASSERT(channel != nullptr); |
| // Make sure the high priority filter has been created. |
| GPR_ASSERT(g_replacement_fn_called); |
| // ... and that the low priority one hasn't. |
| GPR_ASSERT(!g_original_fn_called); |
| grpc_channel_destroy(channel); |
| } |
| |
| const grpc_channel_filter replacement_filter = { |
| call_func, |
| channel_func, |
| 0, |
| call_init_func, |
| grpc_call_stack_ignore_set_pollset_or_pollset_set, |
| call_destroy_func, |
| 0, |
| channel_init_func, |
| channel_destroy_func, |
| grpc_channel_next_get_info, |
| "filter_name"}; |
| |
| const grpc_channel_filter original_filter = { |
| call_func, |
| channel_func, |
| 0, |
| call_init_func, |
| grpc_call_stack_ignore_set_pollset_or_pollset_set, |
| call_destroy_func, |
| 0, |
| channel_init_func, |
| channel_destroy_func, |
| grpc_channel_next_get_info, |
| "filter_name"}; |
| |
| static bool add_replacement_filter(grpc_channel_stack_builder* builder, |
| void* arg) { |
| const grpc_channel_filter* filter = |
| static_cast<const grpc_channel_filter*>(arg); |
| // Get rid of any other version of the filter, as determined by having the |
| // same name. |
| GPR_ASSERT(grpc_channel_stack_builder_remove_filter(builder, filter->name)); |
| return grpc_channel_stack_builder_prepend_filter( |
| builder, filter, set_arg_once_fn, &g_replacement_fn_called); |
| } |
| |
| static bool add_original_filter(grpc_channel_stack_builder* builder, |
| void* arg) { |
| return grpc_channel_stack_builder_prepend_filter( |
| builder, (const grpc_channel_filter*)arg, set_arg_once_fn, |
| &g_original_fn_called); |
| } |
| |
| static void init_plugin(void) { |
| grpc_channel_init_register_stage(GRPC_CLIENT_CHANNEL, INT_MAX, |
| add_original_filter, |
| (void*)&original_filter); |
| grpc_channel_init_register_stage(GRPC_CLIENT_CHANNEL, INT_MAX, |
| add_replacement_filter, |
| (void*)&replacement_filter); |
| } |
| |
| static void destroy_plugin(void) {} |
| |
| int main(int argc, char** argv) { |
| grpc_test_init(argc, argv); |
| grpc_register_plugin(init_plugin, destroy_plugin); |
| grpc_init(); |
| test_channel_stack_builder_filter_replace(); |
| grpc_shutdown(); |
| return 0; |
| } |