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_ASYNCSOCKET_H_ 12 #define WEBRTC_BASE_ASYNCSOCKET_H_ 13 14 #include "webrtc/base/common.h" 15 #include "webrtc/base/sigslot.h" 16 #include "webrtc/base/socket.h" 17 18 namespace rtc { 19 20 // TODO: Remove Socket and rename AsyncSocket to Socket. 21 22 // Provides the ability to perform socket I/O asynchronously. 23 class AsyncSocket : public Socket { 24 public: 25 AsyncSocket(); 26 virtual ~AsyncSocket(); 27 28 virtual AsyncSocket* Accept(SocketAddress* paddr) = 0; 29 30 // SignalReadEvent and SignalWriteEvent use multi_threaded_local to allow 31 // access concurrently from different thread. 32 // For example SignalReadEvent::connect will be called in AsyncUDPSocket ctor 33 // but at the same time the SocketDispatcher maybe signaling the read event. 34 // ready to read 35 sigslot::signal1<AsyncSocket*, 36 sigslot::multi_threaded_local> SignalReadEvent; 37 // ready to write 38 sigslot::signal1<AsyncSocket*, 39 sigslot::multi_threaded_local> SignalWriteEvent; 40 sigslot::signal1<AsyncSocket*> SignalConnectEvent; // connected 41 sigslot::signal2<AsyncSocket*, int> SignalCloseEvent; // closed 42 }; 43 44 class AsyncSocketAdapter : public AsyncSocket, public sigslot::has_slots<> { 45 public: 46 // The adapted socket may explicitly be NULL, and later assigned using Attach. 47 // However, subclasses which support detached mode must override any methods 48 // that will be called during the detached period (usually GetState()), to 49 // avoid dereferencing a null pointer. 50 explicit AsyncSocketAdapter(AsyncSocket* socket); 51 virtual ~AsyncSocketAdapter(); 52 void Attach(AsyncSocket* socket); GetLocalAddress()53 virtual SocketAddress GetLocalAddress() const { 54 return socket_->GetLocalAddress(); 55 } GetRemoteAddress()56 virtual SocketAddress GetRemoteAddress() const { 57 return socket_->GetRemoteAddress(); 58 } Bind(const SocketAddress & addr)59 virtual int Bind(const SocketAddress& addr) { 60 return socket_->Bind(addr); 61 } Connect(const SocketAddress & addr)62 virtual int Connect(const SocketAddress& addr) { 63 return socket_->Connect(addr); 64 } Send(const void * pv,size_t cb)65 virtual int Send(const void* pv, size_t cb) { 66 return socket_->Send(pv, cb); 67 } SendTo(const void * pv,size_t cb,const SocketAddress & addr)68 virtual int SendTo(const void* pv, size_t cb, const SocketAddress& addr) { 69 return socket_->SendTo(pv, cb, addr); 70 } Recv(void * pv,size_t cb)71 virtual int Recv(void* pv, size_t cb) { 72 return socket_->Recv(pv, cb); 73 } RecvFrom(void * pv,size_t cb,SocketAddress * paddr)74 virtual int RecvFrom(void* pv, size_t cb, SocketAddress* paddr) { 75 return socket_->RecvFrom(pv, cb, paddr); 76 } Listen(int backlog)77 virtual int Listen(int backlog) { 78 return socket_->Listen(backlog); 79 } Accept(SocketAddress * paddr)80 virtual AsyncSocket* Accept(SocketAddress* paddr) { 81 return socket_->Accept(paddr); 82 } Close()83 virtual int Close() { 84 return socket_->Close(); 85 } GetError()86 virtual int GetError() const { 87 return socket_->GetError(); 88 } SetError(int error)89 virtual void SetError(int error) { 90 return socket_->SetError(error); 91 } GetState()92 virtual ConnState GetState() const { 93 return socket_->GetState(); 94 } EstimateMTU(uint16 * mtu)95 virtual int EstimateMTU(uint16* mtu) { 96 return socket_->EstimateMTU(mtu); 97 } GetOption(Option opt,int * value)98 virtual int GetOption(Option opt, int* value) { 99 return socket_->GetOption(opt, value); 100 } SetOption(Option opt,int value)101 virtual int SetOption(Option opt, int value) { 102 return socket_->SetOption(opt, value); 103 } 104 105 protected: OnConnectEvent(AsyncSocket * socket)106 virtual void OnConnectEvent(AsyncSocket* socket) { 107 SignalConnectEvent(this); 108 } OnReadEvent(AsyncSocket * socket)109 virtual void OnReadEvent(AsyncSocket* socket) { 110 SignalReadEvent(this); 111 } OnWriteEvent(AsyncSocket * socket)112 virtual void OnWriteEvent(AsyncSocket* socket) { 113 SignalWriteEvent(this); 114 } OnCloseEvent(AsyncSocket * socket,int err)115 virtual void OnCloseEvent(AsyncSocket* socket, int err) { 116 SignalCloseEvent(this, err); 117 } 118 119 AsyncSocket* socket_; 120 }; 121 122 } // namespace rtc 123 124 #endif // WEBRTC_BASE_ASYNCSOCKET_H_ 125