1 /* 2 * libjingle 3 * Copyright 2004--2010, 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 #ifndef TALK_BASE_ASYNCTCPSOCKET_H_ 29 #define TALK_BASE_ASYNCTCPSOCKET_H_ 30 31 #include "talk/base/asyncpacketsocket.h" 32 #include "talk/base/scoped_ptr.h" 33 #include "talk/base/socketfactory.h" 34 35 namespace talk_base { 36 37 // Simulates UDP semantics over TCP. Send and Recv packet sizes 38 // are preserved, and drops packets silently on Send, rather than 39 // buffer them in user space. 40 class AsyncTCPSocket : public AsyncPacketSocket { 41 public: 42 static AsyncTCPSocket* Create(SocketFactory* factory, bool listen); 43 explicit AsyncTCPSocket(AsyncSocket* socket, bool listen); 44 virtual ~AsyncTCPSocket(); 45 46 virtual SocketAddress GetLocalAddress(bool* allocated) const; 47 virtual SocketAddress GetRemoteAddress() const; 48 virtual int Send(const void *pv, size_t cb); 49 virtual int SendTo(const void *pv, size_t cb, const SocketAddress& addr); 50 virtual int Close(); 51 52 virtual Socket::ConnState GetState() const; 53 virtual int GetOption(Socket::Option opt, int* value); 54 virtual int SetOption(Socket::Option opt, int value); 55 virtual int GetError() const; 56 virtual void SetError(int error); 57 58 protected: 59 int SendRaw(const void* pv, size_t cb); 60 virtual void ProcessInput(char* data, size_t& len); 61 62 private: 63 int Flush(); 64 65 // Called by the underlying socket 66 void OnConnectEvent(AsyncSocket* socket); 67 void OnReadEvent(AsyncSocket* socket); 68 void OnWriteEvent(AsyncSocket* socket); 69 void OnCloseEvent(AsyncSocket* socket, int error); 70 71 scoped_ptr<AsyncSocket> socket_; 72 bool listen_; 73 char* inbuf_, * outbuf_; 74 size_t insize_, inpos_, outsize_, outpos_; 75 76 DISALLOW_EVIL_CONSTRUCTORS(AsyncTCPSocket); 77 }; 78 79 } // namespace talk_base 80 81 #endif // TALK_BASE_ASYNCTCPSOCKET_H_ 82