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
42 namespace rtc {
43
BasicPacketSocketFactory()44 BasicPacketSocketFactory::BasicPacketSocketFactory()
45 : thread_(Thread::Current()),
46 socket_factory_(NULL) {
47 }
48
BasicPacketSocketFactory(Thread * thread)49 BasicPacketSocketFactory::BasicPacketSocketFactory(Thread* thread)
50 : thread_(thread),
51 socket_factory_(NULL) {
52 }
53
BasicPacketSocketFactory(SocketFactory * socket_factory)54 BasicPacketSocketFactory::BasicPacketSocketFactory(
55 SocketFactory* socket_factory)
56 : thread_(NULL),
57 socket_factory_(socket_factory) {
58 }
59
~BasicPacketSocketFactory()60 BasicPacketSocketFactory::~BasicPacketSocketFactory() {
61 }
62
CreateUdpSocket(const SocketAddress & address,int min_port,int max_port)63 AsyncPacketSocket* 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
CreateServerTcpSocket(const SocketAddress & local_address,int min_port,int max_port,int opts)81 AsyncPacketSocket* 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
CreateClientTcpSocket(const SocketAddress & local_address,const SocketAddress & remote_address,const ProxyInfo & proxy_info,const std::string & user_agent,int opts)120 AsyncPacketSocket* 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
CreateAsyncResolver()191 AsyncResolverInterface* BasicPacketSocketFactory::CreateAsyncResolver() {
192 return new rtc::AsyncResolver();
193 }
194
BindSocket(AsyncSocket * socket,const SocketAddress & local_address,int min_port,int max_port)195 int 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
socket_factory()212 SocketFactory* 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