1 /* 2 * libjingle 3 * Copyright 2004--2005, 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_ASYNCUDPSOCKET_H_ 29 #define TALK_BASE_ASYNCUDPSOCKET_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 // Provides the ability to receive packets asynchronously. Sends are not 38 // buffered since it is acceptable to drop packets under high load. 39 class AsyncUDPSocket : public AsyncPacketSocket { 40 public: 41 // Binds |socket| and creates AsyncUDPSocket for it. Takes ownership 42 // of |socket|. Returns NULL if bind() fails (|socket| is destroyed 43 // in that case). 44 static AsyncUDPSocket* Create(AsyncSocket* socket, 45 const SocketAddress& bind_address); 46 // Creates a new socket for sending asynchronous UDP packets using an 47 // asynchronous socket from the given factory. 48 static AsyncUDPSocket* Create(SocketFactory* factory, 49 const SocketAddress& bind_address); 50 explicit AsyncUDPSocket(AsyncSocket* socket); 51 virtual ~AsyncUDPSocket(); 52 53 virtual SocketAddress GetLocalAddress() const; 54 virtual SocketAddress GetRemoteAddress() const; 55 virtual int Send(const void *pv, size_t cb, 56 const talk_base::PacketOptions& options); 57 virtual int SendTo(const void *pv, size_t cb, const SocketAddress& addr, 58 const talk_base::PacketOptions& options); 59 virtual int Close(); 60 61 virtual State GetState() const; 62 virtual int GetOption(Socket::Option opt, int* value); 63 virtual int SetOption(Socket::Option opt, int value); 64 virtual int GetError() const; 65 virtual void SetError(int error); 66 67 private: 68 // Called when the underlying socket is ready to be read from. 69 void OnReadEvent(AsyncSocket* socket); 70 // Called when the underlying socket is ready to send. 71 void OnWriteEvent(AsyncSocket* socket); 72 73 scoped_ptr<AsyncSocket> socket_; 74 char* buf_; 75 size_t size_; 76 }; 77 78 } // namespace talk_base 79 80 #endif // TALK_BASE_ASYNCUDPSOCKET_H_ 81