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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <limits.h>
#include <stdbool.h>
#include <string.h>
#include <grpc/support/alloc.h>
#include "src/core/ext/client_config/client_channel.h"
#include "src/core/ext/client_config/lb_policy_registry.h"
#include "src/core/ext/client_config/resolver_registry.h"
#include "src/core/ext/client_config/subchannel_index.h"
#include "src/core/lib/surface/channel_init.h"
#ifndef GRPC_DEFAULT_NAME_PREFIX
#define GRPC_DEFAULT_NAME_PREFIX "dns:///"
#endif
static bool append_filter(grpc_channel_stack_builder *builder, void *arg) {
return grpc_channel_stack_builder_append_filter(
builder, (const grpc_channel_filter *)arg, NULL, NULL);
}
static bool set_default_host_if_unset(grpc_channel_stack_builder *builder,
void *unused) {
const grpc_channel_args *args =
grpc_channel_stack_builder_get_channel_arguments(builder);
for (size_t i = 0; i < args->num_args; i++) {
if (0 == strcmp(args->args[i].key, GRPC_ARG_DEFAULT_AUTHORITY) ||
0 == strcmp(args->args[i].key, GRPC_SSL_TARGET_NAME_OVERRIDE_ARG)) {
return true;
}
}
char *default_authority = grpc_get_default_authority(
grpc_channel_stack_builder_get_target(builder));
if (default_authority != NULL) {
grpc_arg arg;
arg.type = GRPC_ARG_STRING;
arg.key = GRPC_ARG_DEFAULT_AUTHORITY;
arg.value.string = default_authority;
grpc_channel_args *new_args = grpc_channel_args_copy_and_add(args, &arg, 1);
grpc_channel_stack_builder_set_channel_arguments(builder, new_args);
gpr_free(default_authority);
grpc_channel_args_destroy(new_args);
}
return true;
}
void grpc_client_config_init(void) {
grpc_lb_policy_registry_init();
grpc_resolver_registry_init(GRPC_DEFAULT_NAME_PREFIX);
grpc_subchannel_index_init();
grpc_channel_init_register_stage(GRPC_CLIENT_CHANNEL, INT_MIN,
set_default_host_if_unset, NULL);
grpc_channel_init_register_stage(GRPC_CLIENT_CHANNEL, INT_MAX, append_filter,
(void *)&grpc_client_channel_filter);
}
void grpc_client_config_shutdown(void) {
grpc_subchannel_index_shutdown();
grpc_channel_init_shutdown();
grpc_resolver_registry_shutdown();
grpc_lb_policy_registry_shutdown();
}
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