1/*
2 * libjingle
3 * Copyright 2004--2005, 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 _ASYNCSOCKET_H_
29#define _ASYNCSOCKET_H_
30
31#include "talk/base/sigslot.h"
32
33namespace talk_base {
34  class SocketAddress;
35}
36
37namespace buzz {
38
39class AsyncSocket {
40public:
41  enum State {
42    STATE_CLOSED = 0,      //!< Socket is not open.
43    STATE_CLOSING,         //!< Socket is closing but can have buffered data
44    STATE_CONNECTING,      //!< In the process of
45    STATE_OPEN,            //!< Socket is connected
46#if defined(FEATURE_ENABLE_SSL)
47    STATE_TLS_CONNECTING,  //!< Establishing TLS connection
48    STATE_TLS_OPEN,        //!< TLS connected
49#endif
50  };
51
52  enum Error {
53    ERROR_NONE = 0,         //!< No error
54    ERROR_WINSOCK,          //!< Winsock error
55    ERROR_DNS,              //!< Couldn't resolve host name
56    ERROR_WRONGSTATE,       //!< Call made while socket is in the wrong state
57#if defined(FEATURE_ENABLE_SSL)
58    ERROR_SSL,              //!< Something went wrong with OpenSSL
59#endif
60  };
61
62  virtual ~AsyncSocket() {}
63  virtual State state() = 0;
64  virtual Error error() = 0;
65  virtual int GetError() = 0;    // winsock error code
66
67  virtual bool Connect(const talk_base::SocketAddress& addr) = 0;
68  virtual bool Read(char * data, size_t len, size_t* len_read) = 0;
69  virtual bool Write(const char * data, size_t len) = 0;
70  virtual bool Close() = 0;
71#if defined(FEATURE_ENABLE_SSL)
72  // We allow matching any passed domain.
73  // If both names are passed as empty, we do not require a match.
74  virtual bool StartTls(const std::string & domainname) = 0;
75#endif
76
77  sigslot::signal0<> SignalConnected;
78  sigslot::signal0<> SignalSSLConnected;
79  sigslot::signal0<> SignalClosed;
80  sigslot::signal0<> SignalRead;
81  sigslot::signal0<> SignalError;
82};
83
84}
85
86#endif
87