dns_resolver_selection.cc

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//
// Copyright 2019 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.
//
 
// This is similar to the sockaddr resolver, except that it supports a
// bunch of query args that are useful for dependency injection in tests.
 
#include <grpc/support/port_platform.h>
 
#include "src/core/ext/filters/client_channel/resolver/dns/dns_resolver_selection.h"
 
#include "src/core/lib/gprpp/global_config.h"
 
GPR_GLOBAL_CONFIG_DEFINE_STRING(
    grpc_dns_resolver, "",
    "Declares which DNS resolver to use. The default is ares if gRPC is built "
    "with c-ares support. Otherwise, the value of this environment variable is "
    "ignored.")