12a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 22a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 32a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// found in the LICENSE file. 42a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 52a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "net/dns/dns_socket_pool.h" 62a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 72a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/logging.h" 82a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/rand_util.h" 92a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/stl_util.h" 102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "net/base/address_list.h" 112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "net/base/ip_endpoint.h" 122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "net/base/net_errors.h" 132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "net/base/rand_callback.h" 142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "net/socket/client_socket_factory.h" 152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "net/socket/stream_socket.h" 162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "net/udp/datagram_client_socket.h" 172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)namespace net { 192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)namespace { 212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// When we initialize the SocketPool, we allocate kInitialPoolSize sockets. 232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// When we allocate a socket, we ensure we have at least kAllocateMinSize 2468043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles)// sockets to choose from. Freed sockets are not retained. 252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// On Windows, we can't request specific (random) ports, since that will 272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// trigger firewall prompts, so request default ones, but keep a pile of 282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// them. Everywhere else, request fresh, random ports each time. 292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#if defined(OS_WIN) 302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const DatagramSocket::BindType kBindType = DatagramSocket::DEFAULT_BIND; 312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const unsigned kInitialPoolSize = 256; 322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const unsigned kAllocateMinSize = 256; 332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#else 342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const DatagramSocket::BindType kBindType = DatagramSocket::RANDOM_BIND; 352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const unsigned kInitialPoolSize = 0; 362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const unsigned kAllocateMinSize = 1; 372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#endif 382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} // namespace 402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)DnsSocketPool::DnsSocketPool(ClientSocketFactory* socket_factory) 422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) : socket_factory_(socket_factory), 432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) net_log_(NULL), 442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) nameservers_(NULL), 452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) initialized_(false) { 462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void DnsSocketPool::InitializeInternal( 492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const std::vector<IPEndPoint>* nameservers, 502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) NetLog* net_log) { 512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(nameservers); 522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(!initialized_); 532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) net_log_ = net_log; 552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) nameservers_ = nameservers; 562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) initialized_ = true; 572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)scoped_ptr<StreamSocket> DnsSocketPool::CreateTCPSocket( 602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned server_index, 612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const NetLog::Source& source) { 622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK_LT(server_index, nameservers_->size()); 632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return scoped_ptr<StreamSocket>( 652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) socket_factory_->CreateTransportClientSocket( 662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) AddressList((*nameservers_)[server_index]), net_log_, source)); 672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)scoped_ptr<DatagramClientSocket> DnsSocketPool::CreateConnectedSocket( 702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned server_index) { 712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK_LT(server_index, nameservers_->size()); 722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) scoped_ptr<DatagramClientSocket> socket; 742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) NetLog::Source no_source; 763551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) socket = socket_factory_->CreateDatagramClientSocket( 773551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) kBindType, base::Bind(&base::RandInt), net_log_, no_source); 782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (socket.get()) { 802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) int rv = socket->Connect((*nameservers_)[server_index]); 812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (rv != OK) { 82f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) VLOG(1) << "Failed to connect socket: " << rv; 832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) socket.reset(); 842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } else { 862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) LOG(WARNING) << "Failed to create socket."; 872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return socket.Pass(); 902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)class NullDnsSocketPool : public DnsSocketPool { 932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) public: 942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) NullDnsSocketPool(ClientSocketFactory* factory) 952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) : DnsSocketPool(factory) { 962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) virtual void Initialize( 992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const std::vector<IPEndPoint>* nameservers, 1002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) NetLog* net_log) OVERRIDE { 1012a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitializeInternal(nameservers, net_log); 1022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 1032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1042a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) virtual scoped_ptr<DatagramClientSocket> AllocateSocket( 1052a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned server_index) OVERRIDE { 1062a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return CreateConnectedSocket(server_index); 1072a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 1082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) virtual void FreeSocket( 1102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned server_index, 1112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) scoped_ptr<DatagramClientSocket> socket) OVERRIDE { 1122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 1132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) private: 1152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(NullDnsSocketPool); 1162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)}; 1172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// static 1192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)scoped_ptr<DnsSocketPool> DnsSocketPool::CreateNull( 1202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ClientSocketFactory* factory) { 1212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return scoped_ptr<DnsSocketPool>(new NullDnsSocketPool(factory)); 1222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 1232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)class DefaultDnsSocketPool : public DnsSocketPool { 1252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) public: 1262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DefaultDnsSocketPool(ClientSocketFactory* factory) 1272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) : DnsSocketPool(factory) { 1282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) }; 1292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) virtual ~DefaultDnsSocketPool(); 1312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) virtual void Initialize( 1332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const std::vector<IPEndPoint>* nameservers, 1342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) NetLog* net_log) OVERRIDE; 1352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) virtual scoped_ptr<DatagramClientSocket> AllocateSocket( 1372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned server_index) OVERRIDE; 1382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) virtual void FreeSocket( 1402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned server_index, 1412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) scoped_ptr<DatagramClientSocket> socket) OVERRIDE; 1422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) private: 1442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) void FillPool(unsigned server_index, unsigned size); 1452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) typedef std::vector<DatagramClientSocket*> SocketVector; 1472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::vector<SocketVector> pools_; 1492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(DefaultDnsSocketPool); 1512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)}; 1522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// static 1542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)scoped_ptr<DnsSocketPool> DnsSocketPool::CreateDefault( 1552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ClientSocketFactory* factory) { 1562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return scoped_ptr<DnsSocketPool>(new DefaultDnsSocketPool(factory)); 1572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 1582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void DefaultDnsSocketPool::Initialize( 1602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const std::vector<IPEndPoint>* nameservers, 1612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) NetLog* net_log) { 1622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitializeInternal(nameservers, net_log); 1632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(pools_.empty()); 1652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const unsigned num_servers = nameservers->size(); 1662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) pools_.resize(num_servers); 1672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (unsigned server_index = 0; server_index < num_servers; ++server_index) 1682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) FillPool(server_index, kInitialPoolSize); 1692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 1702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)DefaultDnsSocketPool::~DefaultDnsSocketPool() { 1722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned num_servers = pools_.size(); 1732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (unsigned server_index = 0; server_index < num_servers; ++server_index) { 1742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SocketVector& pool = pools_[server_index]; 1752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) STLDeleteElements(&pool); 1762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 1772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 1782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)scoped_ptr<DatagramClientSocket> DefaultDnsSocketPool::AllocateSocket( 1802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned server_index) { 1812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK_LT(server_index, pools_.size()); 1822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SocketVector& pool = pools_[server_index]; 1832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) FillPool(server_index, kAllocateMinSize); 1852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (pool.size() == 0) { 1862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) LOG(WARNING) << "No DNS sockets available in pool " << server_index << "!"; 1877d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) return scoped_ptr<DatagramClientSocket>(); 1882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 1892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (pool.size() < kAllocateMinSize) { 1912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) LOG(WARNING) << "Low DNS port entropy: wanted " << kAllocateMinSize 1922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) << " sockets to choose from, but only have " << pool.size() 1932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) << " in pool " << server_index << "."; 1942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 1952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned socket_index = base::RandInt(0, pool.size() - 1); 1972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DatagramClientSocket* socket = pool[socket_index]; 1982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) pool[socket_index] = pool.back(); 1992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) pool.pop_back(); 2002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2012a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return scoped_ptr<DatagramClientSocket>(socket); 2022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2042a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void DefaultDnsSocketPool::FreeSocket( 2052a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned server_index, 2062a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) scoped_ptr<DatagramClientSocket> socket) { 2072a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK_LT(server_index, pools_.size()); 2082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void DefaultDnsSocketPool::FillPool(unsigned server_index, unsigned size) { 2112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SocketVector& pool = pools_[server_index]; 2122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (unsigned pool_index = pool.size(); pool_index < size; ++pool_index) { 2142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DatagramClientSocket* socket = 2152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) CreateConnectedSocket(server_index).release(); 2162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!socket) 2172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) break; 2182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) pool.push_back(socket); 2192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 2202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} // namespace net 223