henrike@webrtc.org | f7795df | 2014-05-13 18:00:26 +0000 | [diff] [blame^] | 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_ASYNCTCPSOCKET_H_ |
| 12 | #define WEBRTC_BASE_ASYNCTCPSOCKET_H_ |
| 13 | |
| 14 | #include "webrtc/base/asyncpacketsocket.h" |
| 15 | #include "webrtc/base/scoped_ptr.h" |
| 16 | #include "webrtc/base/socketfactory.h" |
| 17 | |
| 18 | namespace rtc { |
| 19 | |
| 20 | // Simulates UDP semantics over TCP. Send and Recv packet sizes |
| 21 | // are preserved, and drops packets silently on Send, rather than |
| 22 | // buffer them in user space. |
| 23 | class AsyncTCPSocketBase : public AsyncPacketSocket { |
| 24 | public: |
| 25 | AsyncTCPSocketBase(AsyncSocket* socket, bool listen, size_t max_packet_size); |
| 26 | virtual ~AsyncTCPSocketBase(); |
| 27 | |
| 28 | // Pure virtual methods to send and recv data. |
| 29 | virtual int Send(const void *pv, size_t cb, |
| 30 | const rtc::PacketOptions& options) = 0; |
| 31 | virtual void ProcessInput(char* data, size_t* len) = 0; |
| 32 | // Signals incoming connection. |
| 33 | virtual void HandleIncomingConnection(AsyncSocket* socket) = 0; |
| 34 | |
| 35 | virtual SocketAddress GetLocalAddress() const; |
| 36 | virtual SocketAddress GetRemoteAddress() const; |
| 37 | virtual int SendTo(const void *pv, size_t cb, const SocketAddress& addr, |
| 38 | const rtc::PacketOptions& options); |
| 39 | virtual int Close(); |
| 40 | |
| 41 | virtual State GetState() const; |
| 42 | virtual int GetOption(Socket::Option opt, int* value); |
| 43 | virtual int SetOption(Socket::Option opt, int value); |
| 44 | virtual int GetError() const; |
| 45 | virtual void SetError(int error); |
| 46 | |
| 47 | protected: |
| 48 | // Binds and connects |socket| and creates AsyncTCPSocket for |
| 49 | // it. Takes ownership of |socket|. Returns NULL if bind() or |
| 50 | // connect() fail (|socket| is destroyed in that case). |
| 51 | static AsyncSocket* ConnectSocket(AsyncSocket* socket, |
| 52 | const SocketAddress& bind_address, |
| 53 | const SocketAddress& remote_address); |
| 54 | virtual int SendRaw(const void* pv, size_t cb); |
| 55 | int FlushOutBuffer(); |
| 56 | // Add data to |outbuf_|. |
| 57 | void AppendToOutBuffer(const void* pv, size_t cb); |
| 58 | |
| 59 | // Helper methods for |outpos_|. |
| 60 | bool IsOutBufferEmpty() const { return outpos_ == 0; } |
| 61 | void ClearOutBuffer() { outpos_ = 0; } |
| 62 | |
| 63 | private: |
| 64 | // Called by the underlying socket |
| 65 | void OnConnectEvent(AsyncSocket* socket); |
| 66 | void OnReadEvent(AsyncSocket* socket); |
| 67 | void OnWriteEvent(AsyncSocket* socket); |
| 68 | void OnCloseEvent(AsyncSocket* socket, int error); |
| 69 | |
| 70 | scoped_ptr<AsyncSocket> socket_; |
| 71 | bool listen_; |
| 72 | char* inbuf_, * outbuf_; |
| 73 | size_t insize_, inpos_, outsize_, outpos_; |
| 74 | |
| 75 | DISALLOW_EVIL_CONSTRUCTORS(AsyncTCPSocketBase); |
| 76 | }; |
| 77 | |
| 78 | class AsyncTCPSocket : public AsyncTCPSocketBase { |
| 79 | public: |
| 80 | // Binds and connects |socket| and creates AsyncTCPSocket for |
| 81 | // it. Takes ownership of |socket|. Returns NULL if bind() or |
| 82 | // connect() fail (|socket| is destroyed in that case). |
| 83 | static AsyncTCPSocket* Create(AsyncSocket* socket, |
| 84 | const SocketAddress& bind_address, |
| 85 | const SocketAddress& remote_address); |
| 86 | AsyncTCPSocket(AsyncSocket* socket, bool listen); |
| 87 | virtual ~AsyncTCPSocket() {} |
| 88 | |
| 89 | virtual int Send(const void* pv, size_t cb, |
| 90 | const rtc::PacketOptions& options); |
| 91 | virtual void ProcessInput(char* data, size_t* len); |
| 92 | virtual void HandleIncomingConnection(AsyncSocket* socket); |
| 93 | |
| 94 | private: |
| 95 | DISALLOW_EVIL_CONSTRUCTORS(AsyncTCPSocket); |
| 96 | }; |
| 97 | |
| 98 | } // namespace rtc |
| 99 | |
| 100 | #endif // WEBRTC_BASE_ASYNCTCPSOCKET_H_ |