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 ~AsyncSocket() override; 27 28 AsyncSocket* Accept(SocketAddress* paddr) override = 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 ~AsyncSocketAdapter() override; 52 void Attach(AsyncSocket* socket); 53 SocketAddress GetLocalAddress() const override; 54 SocketAddress GetRemoteAddress() const override; 55 int Bind(const SocketAddress& addr) override; 56 int Connect(const SocketAddress& addr) override; 57 int Send(const void* pv, size_t cb) override; 58 int SendTo(const void* pv, size_t cb, const SocketAddress& addr) override; 59 int Recv(void* pv, size_t cb) override; 60 int RecvFrom(void* pv, size_t cb, SocketAddress* paddr) override; 61 int Listen(int backlog) override; 62 AsyncSocket* Accept(SocketAddress* paddr) override; 63 int Close() override; 64 int GetError() const override; 65 void SetError(int error) override; 66 ConnState GetState() const override; 67 int EstimateMTU(uint16_t* mtu) override; 68 int GetOption(Option opt, int* value) override; 69 int SetOption(Option opt, int value) override; 70 71 protected: 72 virtual void OnConnectEvent(AsyncSocket* socket); 73 virtual void OnReadEvent(AsyncSocket* socket); 74 virtual void OnWriteEvent(AsyncSocket* socket); 75 virtual void OnCloseEvent(AsyncSocket* socket, int err); 76 77 AsyncSocket* socket_; 78 }; 79 80 } // namespace rtc 81 82 #endif // WEBRTC_BASE_ASYNCSOCKET_H_ 83
