1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "net/dns/dns_client.h"
8 #include "base/rand_util.h"
9 #include "net/base/net_log.h"
10 #include "net/dns/address_sorter.h"
11 #include "net/dns/dns_config_service.h"
12 #include "net/dns/dns_session.h"
13 #include "net/dns/dns_socket_pool.h"
14 #include "net/dns/dns_transaction.h"
15 #include "net/socket/client_socket_factory.h"
21 class DnsClientImpl : public DnsClient {
23 explicit DnsClientImpl(NetLog* net_log)
24 : address_sorter_(AddressSorter::CreateAddressSorter()),
27 virtual void SetConfig(const DnsConfig& config) OVERRIDE {
30 if (config.IsValid() && !config.unhandled_options) {
31 ClientSocketFactory* factory = ClientSocketFactory::GetDefaultFactory();
32 scoped_ptr<DnsSocketPool> socket_pool(
33 config.randomize_ports ? DnsSocketPool::CreateDefault(factory)
34 : DnsSocketPool::CreateNull(factory));
35 session_ = new DnsSession(config,
37 base::Bind(&base::RandInt),
39 factory_ = DnsTransactionFactory::CreateFactory(session_.get());
43 virtual const DnsConfig* GetConfig() const OVERRIDE {
44 return session_.get() ? &session_->config() : NULL;
47 virtual DnsTransactionFactory* GetTransactionFactory() OVERRIDE {
48 return session_.get() ? factory_.get() : NULL;
51 virtual AddressSorter* GetAddressSorter() OVERRIDE {
52 return address_sorter_.get();
56 scoped_refptr<DnsSession> session_;
57 scoped_ptr<DnsTransactionFactory> factory_;
58 scoped_ptr<AddressSorter> address_sorter_;
66 scoped_ptr<DnsClient> DnsClient::CreateClient(NetLog* net_log) {
67 return scoped_ptr<DnsClient>(new DnsClientImpl(net_log));