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source: webrtc/talk/base/asynctcpsocket.h @ 0:4bda6873e34c

pub_scrub_3792 tip
Last change on this file since 0:4bda6873e34c was 0:4bda6873e34c, checked in by Michael Prittie <mprittie@…>, 6 years ago

Scrubbed password for publication.

File size: 4.6 KB
Line 
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 AsyncTCPSocketBase : public AsyncPacketSocket {
41 public:
42  AsyncTCPSocketBase(AsyncSocket* socket, bool listen, size_t max_packet_size);
43  virtual ~AsyncTCPSocketBase();
44
45  // Pure virtual methods to send and recv data.
46  virtual int Send(const void *pv, size_t cb, DiffServCodePoint dscp) = 0;
47  virtual void ProcessInput(char* data, size_t* len) = 0;
48  // Signals incoming connection.
49  virtual void HandleIncomingConnection(AsyncSocket* socket) = 0;
50
51  virtual SocketAddress GetLocalAddress() const;
52  virtual SocketAddress GetRemoteAddress() const;
53  virtual int SendTo(const void *pv, size_t cb, const SocketAddress& addr,
54                     DiffServCodePoint dscp);
55  virtual int Close();
56
57  virtual State GetState() const;
58  virtual int GetOption(Socket::Option opt, int* value);
59  virtual int SetOption(Socket::Option opt, int value);
60  virtual int GetError() const;
61  virtual void SetError(int error);
62
63 protected:
64  // Binds and connects |socket| and creates AsyncTCPSocket for
65  // it. Takes ownership of |socket|. Returns NULL if bind() or
66  // connect() fail (|socket| is destroyed in that case).
67  static AsyncSocket* ConnectSocket(AsyncSocket* socket,
68                                    const SocketAddress& bind_address,
69                                    const SocketAddress& remote_address);
70  virtual int SendRaw(const void* pv, size_t cb);
71  int FlushOutBuffer();
72  // Add data to |outbuf_|.
73  void AppendToOutBuffer(const void* pv, size_t cb);
74
75  // Helper methods for |outpos_|.
76  bool IsOutBufferEmpty() const { return outpos_ == 0; }
77  void ClearOutBuffer() { outpos_ = 0; }
78
79 private:
80  // Called by the underlying socket
81  void OnConnectEvent(AsyncSocket* socket);
82  void OnReadEvent(AsyncSocket* socket);
83  void OnWriteEvent(AsyncSocket* socket);
84  void OnCloseEvent(AsyncSocket* socket, int error);
85
86  scoped_ptr<AsyncSocket> socket_;
87  bool listen_;
88  char* inbuf_, * outbuf_;
89  size_t insize_, inpos_, outsize_, outpos_;
90
91  DISALLOW_EVIL_CONSTRUCTORS(AsyncTCPSocketBase);
92};
93
94class AsyncTCPSocket : public AsyncTCPSocketBase {
95 public:
96  // Binds and connects |socket| and creates AsyncTCPSocket for
97  // it. Takes ownership of |socket|. Returns NULL if bind() or
98  // connect() fail (|socket| is destroyed in that case).
99  static AsyncTCPSocket* Create(AsyncSocket* socket,
100                                const SocketAddress& bind_address,
101                                const SocketAddress& remote_address);
102  AsyncTCPSocket(AsyncSocket* socket, bool listen);
103  virtual ~AsyncTCPSocket() {}
104
105  virtual int Send(const void* pv, size_t cb, DiffServCodePoint dscp);
106  virtual void ProcessInput(char* data, size_t* len);
107  virtual void HandleIncomingConnection(AsyncSocket* socket);
108
109 private:
110  DISALLOW_EVIL_CONSTRUCTORS(AsyncTCPSocket);
111};
112
113}  // namespace talk_base
114
115#endif  // TALK_BASE_ASYNCTCPSOCKET_H_
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