1 /*
2 * libjingle
3 * Copyright 2007, 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/base/autodetectproxy.h"
29 #include "talk/base/httpcommon.h"
30 #include "talk/base/httpcommon-inl.h"
31 #include "talk/base/socketadapters.h"
32 #include "talk/base/ssladapter.h"
33 #include "talk/base/sslsocketfactory.h"
34
35 namespace talk_base {
36
37 ///////////////////////////////////////////////////////////////////////////////
38 // ProxySocketAdapter
39 // TODO: Consider combining AutoDetectProxy and ProxySocketAdapter. I think
40 // the socket adapter is the more appropriate idiom for automatic proxy
41 // detection. We may or may not want to combine proxydetect.* as well.
42 ///////////////////////////////////////////////////////////////////////////////
43
44 class ProxySocketAdapter : public AsyncSocketAdapter {
45 public:
ProxySocketAdapter(SslSocketFactory * factory,int type)46 ProxySocketAdapter(SslSocketFactory* factory, int type)
47 : AsyncSocketAdapter(NULL), factory_(factory), type_(type),
48 detect_(NULL) {
49 }
~ProxySocketAdapter()50 virtual ~ProxySocketAdapter() {
51 Close();
52 }
53
Connect(const SocketAddress & addr)54 virtual int Connect(const SocketAddress& addr) {
55 ASSERT(NULL == detect_);
56 ASSERT(NULL == socket_);
57 remote_ = addr;
58 if (remote_.IsAnyIP() && remote_.hostname().empty()) {
59 LOG_F(LS_ERROR) << "Empty address";
60 return SOCKET_ERROR;
61 }
62 Url<char> url("/", remote_.IPAsString(), remote_.port());
63 detect_ = new AutoDetectProxy(factory_->agent_);
64 detect_->set_server_url(url.url());
65 detect_->SignalWorkDone.connect(this,
66 &ProxySocketAdapter::OnProxyDetectionComplete);
67 detect_->Start();
68 return SOCKET_ERROR;
69 }
GetError() const70 virtual int GetError() const {
71 if (socket_) {
72 return socket_->GetError();
73 }
74 return detect_ ? EWOULDBLOCK : EADDRNOTAVAIL;
75 }
Close()76 virtual int Close() {
77 if (socket_) {
78 return socket_->Close();
79 }
80 if (detect_) {
81 detect_->Destroy(false);
82 detect_ = NULL;
83 }
84 return 0;
85 }
GetState() const86 virtual ConnState GetState() const {
87 if (socket_) {
88 return socket_->GetState();
89 }
90 return detect_ ? CS_CONNECTING : CS_CLOSED;
91 }
92
93 private:
94 // AutoDetectProxy Slots
OnProxyDetectionComplete(SignalThread * thread)95 void OnProxyDetectionComplete(SignalThread* thread) {
96 ASSERT(detect_ == thread);
97 Attach(factory_->CreateProxySocket(detect_->proxy(), type_));
98 detect_->Release();
99 detect_ = NULL;
100 if (0 == AsyncSocketAdapter::Connect(remote_)) {
101 SignalConnectEvent(this);
102 } else if (!IsBlockingError(socket_->GetError())) {
103 SignalCloseEvent(this, socket_->GetError());
104 }
105 }
106
107 SslSocketFactory* factory_;
108 int type_;
109 SocketAddress remote_;
110 AutoDetectProxy* detect_;
111 };
112
113 ///////////////////////////////////////////////////////////////////////////////
114 // SslSocketFactory
115 ///////////////////////////////////////////////////////////////////////////////
116
CreateSocket(int type)117 Socket* SslSocketFactory::CreateSocket(int type) {
118 return factory_->CreateSocket(type);
119 }
120
CreateAsyncSocket(int type)121 AsyncSocket* SslSocketFactory::CreateAsyncSocket(int type) {
122 if (autodetect_proxy_) {
123 return new ProxySocketAdapter(this, type);
124 } else {
125 return CreateProxySocket(proxy_, type);
126 }
127 }
128
CreateProxySocket(const ProxyInfo & proxy,int type)129 AsyncSocket* SslSocketFactory::CreateProxySocket(const ProxyInfo& proxy,
130 int type) {
131 AsyncSocket* socket = factory_->CreateAsyncSocket(type);
132 if (!socket)
133 return NULL;
134
135 // Binary logging happens at the lowest level
136 if (!logging_label_.empty() && binary_mode_) {
137 socket = new LoggingSocketAdapter(socket, logging_level_,
138 logging_label_.c_str(), binary_mode_);
139 }
140
141 if (proxy.type) {
142 AsyncSocket* proxy_socket = 0;
143 if (proxy_.type == PROXY_SOCKS5) {
144 proxy_socket = new AsyncSocksProxySocket(socket, proxy.address,
145 proxy.username, proxy.password);
146 } else {
147 // Note: we are trying unknown proxies as HTTPS currently
148 AsyncHttpsProxySocket* http_proxy =
149 new AsyncHttpsProxySocket(socket, agent_, proxy.address,
150 proxy.username, proxy.password);
151 http_proxy->SetForceConnect(force_connect_ || !hostname_.empty());
152 proxy_socket = http_proxy;
153 }
154 if (!proxy_socket) {
155 delete socket;
156 return NULL;
157 }
158 socket = proxy_socket; // for our purposes the proxy is now the socket
159 }
160
161 if (!hostname_.empty()) {
162 if (SSLAdapter* ssl_adapter = SSLAdapter::Create(socket)) {
163 ssl_adapter->set_ignore_bad_cert(ignore_bad_cert_);
164 ssl_adapter->StartSSL(hostname_.c_str(), true);
165 socket = ssl_adapter;
166 } else {
167 LOG_F(LS_ERROR) << "SSL unavailable";
168 }
169 }
170
171 // Regular logging occurs at the highest level
172 if (!logging_label_.empty() && !binary_mode_) {
173 socket = new LoggingSocketAdapter(socket, logging_level_,
174 logging_label_.c_str(), binary_mode_);
175 }
176 return socket;
177 }
178
179 ///////////////////////////////////////////////////////////////////////////////
180
181 } // namespace talk_base
182