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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/dns/dns_client.h"
#include <utility>
#include "base/bind.h"
#include "base/rand_util.h"
#include "net/dns/address_sorter.h"
#include "net/dns/dns_config_service.h"
#include "net/dns/dns_session.h"
#include "net/dns/dns_socket_pool.h"
#include "net/dns/dns_transaction.h"
#include "net/log/net_log.h"
#include "net/socket/client_socket_factory.h"
namespace net {
namespace {
class DnsClientImpl : public DnsClient {
public:
explicit DnsClientImpl(NetLog* net_log)
: address_sorter_(AddressSorter::CreateAddressSorter()),
net_log_(net_log) {}
void SetConfig(const DnsConfig& config) override {
factory_.reset();
session_ = NULL;
if (config.IsValid() && !config.unhandled_options) {
ClientSocketFactory* factory = ClientSocketFactory::GetDefaultFactory();
scoped_ptr<DnsSocketPool> socket_pool(
config.randomize_ports ? DnsSocketPool::CreateDefault(factory)
: DnsSocketPool::CreateNull(factory));
session_ = new DnsSession(config, std::move(socket_pool),
base::Bind(&base::RandInt), net_log_);
factory_ = DnsTransactionFactory::CreateFactory(session_.get());
}
}
const DnsConfig* GetConfig() const override {
return session_.get() ? &session_->config() : NULL;
}
DnsTransactionFactory* GetTransactionFactory() override {
return session_.get() ? factory_.get() : NULL;
}
AddressSorter* GetAddressSorter() override { return address_sorter_.get(); }
private:
scoped_refptr<DnsSession> session_;
scoped_ptr<DnsTransactionFactory> factory_;
scoped_ptr<AddressSorter> address_sorter_;
NetLog* net_log_;
};
} // namespace
// static
scoped_ptr<DnsClient> DnsClient::CreateClient(NetLog* net_log) {
return scoped_ptr<DnsClient>(new DnsClientImpl(net_log));
}
} // namespace net
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