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/*
*
* 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_exec_ctx *exec_ctx,
grpc_channel_element *elem,
grpc_channel_element_args *args) {
return GRPC_ERROR_NONE;
}
static grpc_error *call_init_func(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
const grpc_call_element_args *args) {
return GRPC_ERROR_NONE;
}
static void channel_destroy_func(grpc_exec_ctx *exec_ctx,
grpc_channel_element *elem) {}
static void call_destroy_func(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
const grpc_call_final_info *final_info,
grpc_closure *ignored) {}
static void call_func(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
grpc_transport_stream_op_batch *op) {}
static void channel_func(grpc_exec_ctx *exec_ctx, 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(exec_ctx, 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 = 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", NULL, NULL);
GPR_ASSERT(channel != NULL);
// 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_exec_ctx *exec_ctx,
grpc_channel_stack_builder *builder,
void *arg) {
const grpc_channel_filter *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_exec_ctx *exec_ctx,
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;
}
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