henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 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: |
| 46 | ProxySocketAdapter(SslSocketFactory* factory, int family, int type) |
| 47 | : AsyncSocketAdapter(NULL), factory_(factory), family_(family), |
| 48 | type_(type), detect_(NULL) { |
| 49 | } |
| 50 | virtual ~ProxySocketAdapter() { |
| 51 | Close(); |
| 52 | } |
| 53 | |
| 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_.HostAsURIString(), 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 | } |
| 70 | virtual int GetError() const { |
| 71 | if (socket_) { |
| 72 | return socket_->GetError(); |
| 73 | } |
| 74 | return detect_ ? EWOULDBLOCK : EADDRNOTAVAIL; |
| 75 | } |
| 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 | } |
| 86 | 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 |
| 95 | void OnProxyDetectionComplete(SignalThread* thread) { |
| 96 | ASSERT(detect_ == thread); |
| 97 | Attach(factory_->CreateProxySocket(detect_->proxy(), family_, 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 family_; |
| 109 | int type_; |
| 110 | SocketAddress remote_; |
| 111 | AutoDetectProxy* detect_; |
| 112 | }; |
| 113 | |
| 114 | /////////////////////////////////////////////////////////////////////////////// |
| 115 | // SslSocketFactory |
| 116 | /////////////////////////////////////////////////////////////////////////////// |
| 117 | |
| 118 | Socket* SslSocketFactory::CreateSocket(int type) { |
| 119 | return CreateSocket(AF_INET, type); |
| 120 | } |
| 121 | |
| 122 | Socket* SslSocketFactory::CreateSocket(int family, int type) { |
| 123 | return factory_->CreateSocket(family, type); |
| 124 | } |
| 125 | |
| 126 | AsyncSocket* SslSocketFactory::CreateAsyncSocket(int type) { |
| 127 | return CreateAsyncSocket(AF_INET, type); |
| 128 | } |
| 129 | |
| 130 | AsyncSocket* SslSocketFactory::CreateAsyncSocket(int family, int type) { |
| 131 | if (autodetect_proxy_) { |
| 132 | return new ProxySocketAdapter(this, family, type); |
| 133 | } else { |
| 134 | return CreateProxySocket(proxy_, family, type); |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | |
| 139 | AsyncSocket* SslSocketFactory::CreateProxySocket(const ProxyInfo& proxy, |
| 140 | int family, |
| 141 | int type) { |
| 142 | AsyncSocket* socket = factory_->CreateAsyncSocket(family, type); |
| 143 | if (!socket) |
| 144 | return NULL; |
| 145 | |
| 146 | // Binary logging happens at the lowest level |
| 147 | if (!logging_label_.empty() && binary_mode_) { |
| 148 | socket = new LoggingSocketAdapter(socket, logging_level_, |
| 149 | logging_label_.c_str(), binary_mode_); |
| 150 | } |
| 151 | |
| 152 | if (proxy.type) { |
| 153 | AsyncSocket* proxy_socket = 0; |
| 154 | if (proxy_.type == PROXY_SOCKS5) { |
| 155 | proxy_socket = new AsyncSocksProxySocket(socket, proxy.address, |
| 156 | proxy.username, proxy.password); |
| 157 | } else { |
| 158 | // Note: we are trying unknown proxies as HTTPS currently |
| 159 | AsyncHttpsProxySocket* http_proxy = |
| 160 | new AsyncHttpsProxySocket(socket, agent_, proxy.address, |
| 161 | proxy.username, proxy.password); |
| 162 | http_proxy->SetForceConnect(force_connect_ || !hostname_.empty()); |
| 163 | proxy_socket = http_proxy; |
| 164 | } |
| 165 | if (!proxy_socket) { |
| 166 | delete socket; |
| 167 | return NULL; |
| 168 | } |
| 169 | socket = proxy_socket; // for our purposes the proxy is now the socket |
| 170 | } |
| 171 | |
| 172 | if (!hostname_.empty()) { |
| 173 | if (SSLAdapter* ssl_adapter = SSLAdapter::Create(socket)) { |
| 174 | ssl_adapter->set_ignore_bad_cert(ignore_bad_cert_); |
| 175 | ssl_adapter->StartSSL(hostname_.c_str(), true); |
| 176 | socket = ssl_adapter; |
| 177 | } else { |
| 178 | LOG_F(LS_ERROR) << "SSL unavailable"; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | // Regular logging occurs at the highest level |
| 183 | if (!logging_label_.empty() && !binary_mode_) { |
| 184 | socket = new LoggingSocketAdapter(socket, logging_level_, |
| 185 | logging_label_.c_str(), binary_mode_); |
| 186 | } |
| 187 | return socket; |
| 188 | } |
| 189 | |
| 190 | /////////////////////////////////////////////////////////////////////////////// |
| 191 | |
| 192 | } // namespace talk_base |