1/* 2 * libjingle 3 * Copyright 2011, Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#include "talk/p2p/base/basicpacketsocketfactory.h" 29 30#include "talk/p2p/base/asyncstuntcpsocket.h" 31#include "talk/p2p/base/stun.h" 32#include "webrtc/base/asynctcpsocket.h" 33#include "webrtc/base/asyncudpsocket.h" 34#include "webrtc/base/logging.h" 35#include "webrtc/base/nethelpers.h" 36#include "webrtc/base/physicalsocketserver.h" 37#include "webrtc/base/scoped_ptr.h" 38#include "webrtc/base/socketadapters.h" 39#include "webrtc/base/ssladapter.h" 40#include "webrtc/base/thread.h" 41 42namespace rtc { 43 44BasicPacketSocketFactory::BasicPacketSocketFactory() 45 : thread_(Thread::Current()), 46 socket_factory_(NULL) { 47} 48 49BasicPacketSocketFactory::BasicPacketSocketFactory(Thread* thread) 50 : thread_(thread), 51 socket_factory_(NULL) { 52} 53 54BasicPacketSocketFactory::BasicPacketSocketFactory( 55 SocketFactory* socket_factory) 56 : thread_(NULL), 57 socket_factory_(socket_factory) { 58} 59 60BasicPacketSocketFactory::~BasicPacketSocketFactory() { 61} 62 63AsyncPacketSocket* BasicPacketSocketFactory::CreateUdpSocket( 64 const SocketAddress& address, int min_port, int max_port) { 65 // UDP sockets are simple. 66 rtc::AsyncSocket* socket = 67 socket_factory()->CreateAsyncSocket( 68 address.family(), SOCK_DGRAM); 69 if (!socket) { 70 return NULL; 71 } 72 if (BindSocket(socket, address, min_port, max_port) < 0) { 73 LOG(LS_ERROR) << "UDP bind failed with error " 74 << socket->GetError(); 75 delete socket; 76 return NULL; 77 } 78 return new rtc::AsyncUDPSocket(socket); 79} 80 81AsyncPacketSocket* BasicPacketSocketFactory::CreateServerTcpSocket( 82 const SocketAddress& local_address, int min_port, int max_port, int opts) { 83 84 // Fail if TLS is required. 85 if (opts & PacketSocketFactory::OPT_TLS) { 86 LOG(LS_ERROR) << "TLS support currently is not available."; 87 return NULL; 88 } 89 90 rtc::AsyncSocket* socket = 91 socket_factory()->CreateAsyncSocket(local_address.family(), 92 SOCK_STREAM); 93 if (!socket) { 94 return NULL; 95 } 96 97 if (BindSocket(socket, local_address, min_port, max_port) < 0) { 98 LOG(LS_ERROR) << "TCP bind failed with error " 99 << socket->GetError(); 100 delete socket; 101 return NULL; 102 } 103 104 // If using SSLTCP, wrap the TCP socket in a pseudo-SSL socket. 105 if (opts & PacketSocketFactory::OPT_SSLTCP) { 106 ASSERT(!(opts & PacketSocketFactory::OPT_TLS)); 107 socket = new rtc::AsyncSSLSocket(socket); 108 } 109 110 // Set TCP_NODELAY (via OPT_NODELAY) for improved performance. 111 // See http://go/gtalktcpnodelayexperiment 112 socket->SetOption(rtc::Socket::OPT_NODELAY, 1); 113 114 if (opts & PacketSocketFactory::OPT_STUN) 115 return new cricket::AsyncStunTCPSocket(socket, true); 116 117 return new rtc::AsyncTCPSocket(socket, true); 118} 119 120AsyncPacketSocket* BasicPacketSocketFactory::CreateClientTcpSocket( 121 const SocketAddress& local_address, const SocketAddress& remote_address, 122 const ProxyInfo& proxy_info, const std::string& user_agent, int opts) { 123 124 rtc::AsyncSocket* socket = 125 socket_factory()->CreateAsyncSocket(local_address.family(), SOCK_STREAM); 126 if (!socket) { 127 return NULL; 128 } 129 130 if (BindSocket(socket, local_address, 0, 0) < 0) { 131 LOG(LS_ERROR) << "TCP bind failed with error " 132 << socket->GetError(); 133 delete socket; 134 return NULL; 135 } 136 137 // If using a proxy, wrap the socket in a proxy socket. 138 if (proxy_info.type == rtc::PROXY_SOCKS5) { 139 socket = new rtc::AsyncSocksProxySocket( 140 socket, proxy_info.address, proxy_info.username, proxy_info.password); 141 } else if (proxy_info.type == rtc::PROXY_HTTPS) { 142 socket = new rtc::AsyncHttpsProxySocket( 143 socket, user_agent, proxy_info.address, 144 proxy_info.username, proxy_info.password); 145 } 146 147 // If using TLS, wrap the socket in an SSL adapter. 148 if (opts & PacketSocketFactory::OPT_TLS) { 149 ASSERT(!(opts & PacketSocketFactory::OPT_SSLTCP)); 150 151 rtc::SSLAdapter* ssl_adapter = rtc::SSLAdapter::Create(socket); 152 if (!ssl_adapter) { 153 return NULL; 154 } 155 156 socket = ssl_adapter; 157 158 if (ssl_adapter->StartSSL(remote_address.hostname().c_str(), false) != 0) { 159 delete ssl_adapter; 160 return NULL; 161 } 162 163 // If using SSLTCP, wrap the TCP socket in a pseudo-SSL socket. 164 } else if (opts & PacketSocketFactory::OPT_SSLTCP) { 165 ASSERT(!(opts & PacketSocketFactory::OPT_TLS)); 166 socket = new rtc::AsyncSSLSocket(socket); 167 } 168 169 if (socket->Connect(remote_address) < 0) { 170 LOG(LS_ERROR) << "TCP connect failed with error " 171 << socket->GetError(); 172 delete socket; 173 return NULL; 174 } 175 176 // Finally, wrap that socket in a TCP or STUN TCP packet socket. 177 AsyncPacketSocket* tcp_socket; 178 if (opts & PacketSocketFactory::OPT_STUN) { 179 tcp_socket = new cricket::AsyncStunTCPSocket(socket, false); 180 } else { 181 tcp_socket = new rtc::AsyncTCPSocket(socket, false); 182 } 183 184 // Set TCP_NODELAY (via OPT_NODELAY) for improved performance. 185 // See http://go/gtalktcpnodelayexperiment 186 tcp_socket->SetOption(rtc::Socket::OPT_NODELAY, 1); 187 188 return tcp_socket; 189} 190 191AsyncResolverInterface* BasicPacketSocketFactory::CreateAsyncResolver() { 192 return new rtc::AsyncResolver(); 193} 194 195int BasicPacketSocketFactory::BindSocket( 196 AsyncSocket* socket, const SocketAddress& local_address, 197 int min_port, int max_port) { 198 int ret = -1; 199 if (min_port == 0 && max_port == 0) { 200 // If there's no port range, let the OS pick a port for us. 201 ret = socket->Bind(local_address); 202 } else { 203 // Otherwise, try to find a port in the provided range. 204 for (int port = min_port; ret < 0 && port <= max_port; ++port) { 205 ret = socket->Bind(rtc::SocketAddress(local_address.ipaddr(), 206 port)); 207 } 208 } 209 return ret; 210} 211 212SocketFactory* BasicPacketSocketFactory::socket_factory() { 213 if (thread_) { 214 ASSERT(thread_ == Thread::Current()); 215 return thread_->socketserver(); 216 } else { 217 return socket_factory_; 218 } 219} 220 221} // namespace rtc 222