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_ASYNCTCPSOCKET_H_
29#define TALK_BASE_ASYNCTCPSOCKET_H_
30
31#include "talk/base/asyncpacketsocket.h"
32#include "talk/base/scoped_ptr.h"
33#include "talk/base/socketfactory.h"
34
35namespace talk_base {
36
37// Simulates UDP semantics over TCP.  Send and Recv packet sizes
38// are preserved, and drops packets silently on Send, rather than
39// buffer them in user space.
40class AsyncTCPSocket : public AsyncPacketSocket {
41 public:
42  static AsyncTCPSocket* Create(SocketFactory* factory, bool listen);
43  explicit AsyncTCPSocket(AsyncSocket* socket, bool listen);
44  virtual ~AsyncTCPSocket();
45
46  virtual SocketAddress GetLocalAddress(bool* allocated) const;
47  virtual SocketAddress GetRemoteAddress() const;
48  virtual int Send(const void *pv, size_t cb);
49  virtual int SendTo(const void *pv, size_t cb, const SocketAddress& addr);
50  virtual int Close();
51
52  virtual Socket::ConnState GetState() const;
53  virtual int GetOption(Socket::Option opt, int* value);
54  virtual int SetOption(Socket::Option opt, int value);
55  virtual int GetError() const;
56  virtual void SetError(int error);
57
58 protected:
59  int SendRaw(const void* pv, size_t cb);
60  virtual void ProcessInput(char* data, size_t& len);
61
62 private:
63  int Flush();
64
65  // Called by the underlying socket
66  void OnConnectEvent(AsyncSocket* socket);
67  void OnReadEvent(AsyncSocket* socket);
68  void OnWriteEvent(AsyncSocket* socket);
69  void OnCloseEvent(AsyncSocket* socket, int error);
70
71  scoped_ptr<AsyncSocket> socket_;
72  bool listen_;
73  char* inbuf_, * outbuf_;
74  size_t insize_, inpos_, outsize_, outpos_;
75
76  DISALLOW_EVIL_CONSTRUCTORS(AsyncTCPSocket);
77};
78
79}  // namespace talk_base
80
81#endif  // TALK_BASE_ASYNCTCPSOCKET_H_
82