henrike@webrtc.org | f7795df | 2014-05-13 18:00:26 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #ifndef WEBRTC_BASE_SOCKETADAPTERS_H_ |
| 12 | #define WEBRTC_BASE_SOCKETADAPTERS_H_ |
| 13 | |
| 14 | #include <map> |
| 15 | #include <string> |
| 16 | |
| 17 | #include "webrtc/base/asyncsocket.h" |
| 18 | #include "webrtc/base/cryptstring.h" |
| 19 | #include "webrtc/base/logging.h" |
| 20 | |
| 21 | namespace rtc { |
| 22 | |
| 23 | struct HttpAuthContext; |
| 24 | class ByteBuffer; |
| 25 | |
| 26 | /////////////////////////////////////////////////////////////////////////////// |
| 27 | |
| 28 | // Implements a socket adapter that can buffer and process data internally, |
| 29 | // as in the case of connecting to a proxy, where you must speak the proxy |
| 30 | // protocol before commencing normal socket behavior. |
| 31 | class BufferedReadAdapter : public AsyncSocketAdapter { |
| 32 | public: |
| 33 | BufferedReadAdapter(AsyncSocket* socket, size_t buffer_size); |
| 34 | virtual ~BufferedReadAdapter(); |
| 35 | |
| 36 | virtual int Send(const void* pv, size_t cb); |
| 37 | virtual int Recv(void* pv, size_t cb); |
| 38 | |
| 39 | protected: |
| 40 | int DirectSend(const void* pv, size_t cb) { |
| 41 | return AsyncSocketAdapter::Send(pv, cb); |
| 42 | } |
| 43 | |
| 44 | void BufferInput(bool on = true); |
| 45 | virtual void ProcessInput(char* data, size_t* len) = 0; |
| 46 | |
| 47 | virtual void OnReadEvent(AsyncSocket * socket); |
| 48 | |
| 49 | private: |
| 50 | char * buffer_; |
| 51 | size_t buffer_size_, data_len_; |
| 52 | bool buffering_; |
| 53 | DISALLOW_EVIL_CONSTRUCTORS(BufferedReadAdapter); |
| 54 | }; |
| 55 | |
| 56 | /////////////////////////////////////////////////////////////////////////////// |
| 57 | |
| 58 | // Interface for implementing proxy server sockets. |
| 59 | class AsyncProxyServerSocket : public BufferedReadAdapter { |
| 60 | public: |
| 61 | AsyncProxyServerSocket(AsyncSocket* socket, size_t buffer_size) |
| 62 | : BufferedReadAdapter(socket, buffer_size) {} |
| 63 | sigslot::signal2<AsyncProxyServerSocket*, |
| 64 | const SocketAddress&> SignalConnectRequest; |
| 65 | virtual void SendConnectResult(int err, const SocketAddress& addr) = 0; |
| 66 | }; |
| 67 | |
| 68 | /////////////////////////////////////////////////////////////////////////////// |
| 69 | |
| 70 | // Implements a socket adapter that performs the client side of a |
| 71 | // fake SSL handshake. Used for "ssltcp" P2P functionality. |
| 72 | class AsyncSSLSocket : public BufferedReadAdapter { |
| 73 | public: |
| 74 | explicit AsyncSSLSocket(AsyncSocket* socket); |
| 75 | |
| 76 | virtual int Connect(const SocketAddress& addr); |
| 77 | |
| 78 | protected: |
| 79 | virtual void OnConnectEvent(AsyncSocket* socket); |
| 80 | virtual void ProcessInput(char* data, size_t* len); |
| 81 | DISALLOW_EVIL_CONSTRUCTORS(AsyncSSLSocket); |
| 82 | }; |
| 83 | |
| 84 | // Implements a socket adapter that performs the server side of a |
| 85 | // fake SSL handshake. Used when implementing a relay server that does "ssltcp". |
| 86 | class AsyncSSLServerSocket : public BufferedReadAdapter { |
| 87 | public: |
| 88 | explicit AsyncSSLServerSocket(AsyncSocket* socket); |
| 89 | |
| 90 | protected: |
| 91 | virtual void ProcessInput(char* data, size_t* len); |
| 92 | DISALLOW_EVIL_CONSTRUCTORS(AsyncSSLServerSocket); |
| 93 | }; |
| 94 | |
| 95 | /////////////////////////////////////////////////////////////////////////////// |
| 96 | |
| 97 | // Implements a socket adapter that speaks the HTTP/S proxy protocol. |
| 98 | class AsyncHttpsProxySocket : public BufferedReadAdapter { |
| 99 | public: |
| 100 | AsyncHttpsProxySocket(AsyncSocket* socket, const std::string& user_agent, |
| 101 | const SocketAddress& proxy, |
| 102 | const std::string& username, const CryptString& password); |
| 103 | virtual ~AsyncHttpsProxySocket(); |
| 104 | |
| 105 | // If connect is forced, the adapter will always issue an HTTP CONNECT to the |
| 106 | // target address. Otherwise, it will connect only if the destination port |
| 107 | // is not port 80. |
| 108 | void SetForceConnect(bool force) { force_connect_ = force; } |
| 109 | |
| 110 | virtual int Connect(const SocketAddress& addr); |
| 111 | virtual SocketAddress GetRemoteAddress() const; |
| 112 | virtual int Close(); |
| 113 | virtual ConnState GetState() const; |
| 114 | |
| 115 | protected: |
| 116 | virtual void OnConnectEvent(AsyncSocket* socket); |
| 117 | virtual void OnCloseEvent(AsyncSocket* socket, int err); |
| 118 | virtual void ProcessInput(char* data, size_t* len); |
| 119 | |
| 120 | bool ShouldIssueConnect() const; |
| 121 | void SendRequest(); |
| 122 | void ProcessLine(char* data, size_t len); |
| 123 | void EndResponse(); |
| 124 | void Error(int error); |
| 125 | |
| 126 | private: |
| 127 | SocketAddress proxy_, dest_; |
| 128 | std::string agent_, user_, headers_; |
| 129 | CryptString pass_; |
| 130 | bool force_connect_; |
| 131 | size_t content_length_; |
| 132 | int defer_error_; |
| 133 | bool expect_close_; |
| 134 | enum ProxyState { |
| 135 | PS_INIT, PS_LEADER, PS_AUTHENTICATE, PS_SKIP_HEADERS, PS_ERROR_HEADERS, |
| 136 | PS_TUNNEL_HEADERS, PS_SKIP_BODY, PS_TUNNEL, PS_WAIT_CLOSE, PS_ERROR |
| 137 | } state_; |
| 138 | HttpAuthContext * context_; |
| 139 | std::string unknown_mechanisms_; |
| 140 | DISALLOW_EVIL_CONSTRUCTORS(AsyncHttpsProxySocket); |
| 141 | }; |
| 142 | |
| 143 | /* TODO: Implement this. |
| 144 | class AsyncHttpsProxyServerSocket : public AsyncProxyServerSocket { |
| 145 | public: |
| 146 | explicit AsyncHttpsProxyServerSocket(AsyncSocket* socket); |
| 147 | |
| 148 | private: |
| 149 | virtual void ProcessInput(char * data, size_t& len); |
| 150 | void Error(int error); |
| 151 | DISALLOW_EVIL_CONSTRUCTORS(AsyncHttpsProxyServerSocket); |
| 152 | }; |
| 153 | */ |
| 154 | |
| 155 | /////////////////////////////////////////////////////////////////////////////// |
| 156 | |
| 157 | // Implements a socket adapter that speaks the SOCKS proxy protocol. |
| 158 | class AsyncSocksProxySocket : public BufferedReadAdapter { |
| 159 | public: |
| 160 | AsyncSocksProxySocket(AsyncSocket* socket, const SocketAddress& proxy, |
| 161 | const std::string& username, const CryptString& password); |
| 162 | |
| 163 | virtual int Connect(const SocketAddress& addr); |
| 164 | virtual SocketAddress GetRemoteAddress() const; |
| 165 | virtual int Close(); |
| 166 | virtual ConnState GetState() const; |
| 167 | |
| 168 | protected: |
| 169 | virtual void OnConnectEvent(AsyncSocket* socket); |
| 170 | virtual void ProcessInput(char* data, size_t* len); |
| 171 | |
| 172 | void SendHello(); |
| 173 | void SendConnect(); |
| 174 | void SendAuth(); |
| 175 | void Error(int error); |
| 176 | |
| 177 | private: |
| 178 | enum State { |
| 179 | SS_INIT, SS_HELLO, SS_AUTH, SS_CONNECT, SS_TUNNEL, SS_ERROR |
| 180 | }; |
| 181 | State state_; |
| 182 | SocketAddress proxy_, dest_; |
| 183 | std::string user_; |
| 184 | CryptString pass_; |
| 185 | DISALLOW_EVIL_CONSTRUCTORS(AsyncSocksProxySocket); |
| 186 | }; |
| 187 | |
| 188 | // Implements a proxy server socket for the SOCKS protocol. |
| 189 | class AsyncSocksProxyServerSocket : public AsyncProxyServerSocket { |
| 190 | public: |
| 191 | explicit AsyncSocksProxyServerSocket(AsyncSocket* socket); |
| 192 | |
| 193 | private: |
| 194 | virtual void ProcessInput(char* data, size_t* len); |
| 195 | void DirectSend(const ByteBuffer& buf); |
| 196 | |
| 197 | void HandleHello(ByteBuffer* request); |
| 198 | void SendHelloReply(int method); |
| 199 | void HandleAuth(ByteBuffer* request); |
| 200 | void SendAuthReply(int result); |
| 201 | void HandleConnect(ByteBuffer* request); |
| 202 | virtual void SendConnectResult(int result, const SocketAddress& addr); |
| 203 | |
| 204 | void Error(int error); |
| 205 | |
| 206 | static const int kBufferSize = 1024; |
| 207 | enum State { |
| 208 | SS_HELLO, SS_AUTH, SS_CONNECT, SS_CONNECT_PENDING, SS_TUNNEL, SS_ERROR |
| 209 | }; |
| 210 | State state_; |
| 211 | DISALLOW_EVIL_CONSTRUCTORS(AsyncSocksProxyServerSocket); |
| 212 | }; |
| 213 | |
| 214 | /////////////////////////////////////////////////////////////////////////////// |
| 215 | |
| 216 | // Implements a socket adapter that logs everything that it sends and receives. |
| 217 | class LoggingSocketAdapter : public AsyncSocketAdapter { |
| 218 | public: |
| 219 | LoggingSocketAdapter(AsyncSocket* socket, LoggingSeverity level, |
| 220 | const char * label, bool hex_mode = false); |
| 221 | |
| 222 | virtual int Send(const void *pv, size_t cb); |
| 223 | virtual int SendTo(const void *pv, size_t cb, const SocketAddress& addr); |
| 224 | virtual int Recv(void *pv, size_t cb); |
| 225 | virtual int RecvFrom(void *pv, size_t cb, SocketAddress *paddr); |
| 226 | virtual int Close(); |
| 227 | |
| 228 | protected: |
| 229 | virtual void OnConnectEvent(AsyncSocket * socket); |
| 230 | virtual void OnCloseEvent(AsyncSocket * socket, int err); |
| 231 | |
| 232 | private: |
| 233 | LoggingSeverity level_; |
| 234 | std::string label_; |
| 235 | bool hex_mode_; |
| 236 | LogMultilineState lms_; |
| 237 | DISALLOW_EVIL_CONSTRUCTORS(LoggingSocketAdapter); |
| 238 | }; |
| 239 | |
| 240 | /////////////////////////////////////////////////////////////////////////////// |
| 241 | |
| 242 | } // namespace rtc |
| 243 | |
| 244 | #endif // WEBRTC_BASE_SOCKETADAPTERS_H_ |