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_ASYNCSOCKET_H_ 29 #define TALK_BASE_ASYNCSOCKET_H_ 30 31 #include "talk/base/common.h" 32 #include "talk/base/sigslot.h" 33 #include "talk/base/socket.h" 34 35 namespace talk_base { 36 37 // TODO: Remove Socket and rename AsyncSocket to Socket. 38 39 // Provides the ability to perform socket I/O asynchronously. 40 class AsyncSocket : public Socket { 41 public: 42 AsyncSocket(); 43 virtual ~AsyncSocket(); 44 45 virtual AsyncSocket* Accept(SocketAddress* paddr) = 0; 46 47 sigslot::signal1<AsyncSocket*> SignalReadEvent; // ready to read 48 sigslot::signal1<AsyncSocket*> SignalWriteEvent; // ready to write 49 sigslot::signal1<AsyncSocket*> SignalConnectEvent; // connected 50 sigslot::signal2<AsyncSocket*, int> SignalCloseEvent; // closed 51 }; 52 53 class AsyncSocketAdapter : public AsyncSocket, public sigslot::has_slots<> { 54 public: 55 // The adapted socket may explicitly be NULL, and later assigned using Attach. 56 // However, subclasses which support detached mode must override any methods 57 // that will be called during the detached period (usually GetState()), to 58 // avoid dereferencing a null pointer. 59 explicit AsyncSocketAdapter(AsyncSocket* socket); 60 virtual ~AsyncSocketAdapter(); 61 void Attach(AsyncSocket* socket); 62 virtual SocketAddress GetLocalAddress() const { 63 return socket_->GetLocalAddress(); 64 } 65 virtual SocketAddress GetRemoteAddress() const { 66 return socket_->GetRemoteAddress(); 67 } 68 virtual int Bind(const SocketAddress& addr) { 69 return socket_->Bind(addr); 70 } 71 virtual int Connect(const SocketAddress& addr) { 72 return socket_->Connect(addr); 73 } 74 virtual int Send(const void* pv, size_t cb) { 75 return socket_->Send(pv, cb); 76 } 77 virtual int SendTo(const void* pv, size_t cb, const SocketAddress& addr) { 78 return socket_->SendTo(pv, cb, addr); 79 } 80 virtual int Recv(void* pv, size_t cb) { 81 return socket_->Recv(pv, cb); 82 } 83 virtual int RecvFrom(void* pv, size_t cb, SocketAddress* paddr) { 84 return socket_->RecvFrom(pv, cb, paddr); 85 } 86 virtual int Listen(int backlog) { 87 return socket_->Listen(backlog); 88 } 89 virtual AsyncSocket* Accept(SocketAddress* paddr) { 90 return socket_->Accept(paddr); 91 } 92 virtual int Close() { 93 return socket_->Close(); 94 } 95 virtual int GetError() const { 96 return socket_->GetError(); 97 } 98 virtual void SetError(int error) { 99 return socket_->SetError(error); 100 } 101 virtual ConnState GetState() const { 102 return socket_->GetState(); 103 } 104 virtual int EstimateMTU(uint16* mtu) { 105 return socket_->EstimateMTU(mtu); 106 } 107 virtual int GetOption(Option opt, int* value) { 108 return socket_->GetOption(opt, value); 109 } 110 virtual int SetOption(Option opt, int value) { 111 return socket_->SetOption(opt, value); 112 } 113 114 protected: 115 virtual void OnConnectEvent(AsyncSocket* socket) { 116 SignalConnectEvent(this); 117 } 118 virtual void OnReadEvent(AsyncSocket* socket) { 119 SignalReadEvent(this); 120 } 121 virtual void OnWriteEvent(AsyncSocket* socket) { 122 SignalWriteEvent(this); 123 } 124 virtual void OnCloseEvent(AsyncSocket* socket, int err) { 125 SignalCloseEvent(this, err); 126 } 127 128 AsyncSocket* socket_; 129 }; 130 131 } // namespace talk_base 132 133 #endif // TALK_BASE_ASYNCSOCKET_H_ 134