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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 <grpc/support/port_platform.h>
#include "src/core/ext/filters/client_channel/proxy_mapper_registry.h"
#include <string.h>
#include <grpc/support/alloc.h>
//
// grpc_proxy_mapper_list
//
typedef struct {
grpc_proxy_mapper** list;
size_t num_mappers;
} grpc_proxy_mapper_list;
static void grpc_proxy_mapper_list_register(grpc_proxy_mapper_list* list,
bool at_start,
grpc_proxy_mapper* mapper) {
list->list = static_cast<grpc_proxy_mapper**>(gpr_realloc(
list->list, (list->num_mappers + 1) * sizeof(grpc_proxy_mapper*)));
if (at_start) {
memmove(list->list + 1, list->list,
sizeof(grpc_proxy_mapper*) * list->num_mappers);
list->list[0] = mapper;
} else {
list->list[list->num_mappers] = mapper;
}
++list->num_mappers;
}
static bool grpc_proxy_mapper_list_map_name(grpc_proxy_mapper_list* list,
const char* server_uri,
const grpc_channel_args* args,
char** name_to_resolve,
grpc_channel_args** new_args) {
for (size_t i = 0; i < list->num_mappers; ++i) {
if (grpc_proxy_mapper_map_name(list->list[i], server_uri, args,
name_to_resolve, new_args)) {
return true;
}
}
return false;
}
static bool grpc_proxy_mapper_list_map_address(
grpc_proxy_mapper_list* list, const grpc_resolved_address* address,
const grpc_channel_args* args, grpc_resolved_address** new_address,
grpc_channel_args** new_args) {
for (size_t i = 0; i < list->num_mappers; ++i) {
if (grpc_proxy_mapper_map_address(list->list[i], address, args, new_address,
new_args)) {
return true;
}
}
return false;
}
static void grpc_proxy_mapper_list_destroy(grpc_proxy_mapper_list* list) {
for (size_t i = 0; i < list->num_mappers; ++i) {
grpc_proxy_mapper_destroy(list->list[i]);
}
gpr_free(list->list);
// Clean up in case we re-initialze later.
// TODO(ctiller): This should ideally live in
// grpc_proxy_mapper_registry_init(). However, if we did this there,
// then we would do it AFTER we start registering proxy mappers from
// third-party plugins, so they'd never show up (and would leak memory).
// We probably need some sort of dependency system for plugins to fix
// this.
memset(list, 0, sizeof(*list));
}
//
// plugin
//
static grpc_proxy_mapper_list g_proxy_mapper_list;
void grpc_proxy_mapper_registry_init() {}
void grpc_proxy_mapper_registry_shutdown() {
grpc_proxy_mapper_list_destroy(&g_proxy_mapper_list);
}
void grpc_proxy_mapper_register(bool at_start, grpc_proxy_mapper* mapper) {
grpc_proxy_mapper_list_register(&g_proxy_mapper_list, at_start, mapper);
}
bool grpc_proxy_mappers_map_name(const char* server_uri,
const grpc_channel_args* args,
char** name_to_resolve,
grpc_channel_args** new_args) {
return grpc_proxy_mapper_list_map_name(&g_proxy_mapper_list, server_uri, args,
name_to_resolve, new_args);
}
bool grpc_proxy_mappers_map_address(const grpc_resolved_address* address,
const grpc_channel_args* args,
grpc_resolved_address** new_address,
grpc_channel_args** new_args) {
return grpc_proxy_mapper_list_map_address(&g_proxy_mapper_list, address, args,
new_address, new_args);
}
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