1/*
2 * libjingle
3 * Copyright 2008, 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_NETHELPERS_H_
29#define TALK_BASE_NETHELPERS_H_
30
31#ifdef POSIX
32#include <netdb.h>
33#include <cstddef>
34#elif WIN32
35#include <winsock2.h>  // NOLINT
36#endif
37
38#include <list>
39
40#include "talk/base/asyncresolverinterface.h"
41#include "talk/base/signalthread.h"
42#include "talk/base/sigslot.h"
43#include "talk/base/socketaddress.h"
44
45namespace talk_base {
46
47class AsyncResolverTest;
48
49// AsyncResolver will perform async DNS resolution, signaling the result on
50// the SignalDone from AsyncResolverInterface when the operation completes.
51class AsyncResolver : public SignalThread, public AsyncResolverInterface {
52 public:
53  AsyncResolver();
54  virtual ~AsyncResolver() {}
55
56  virtual void Start(const SocketAddress& addr);
57  virtual bool GetResolvedAddress(int family, SocketAddress* addr) const;
58  virtual int GetError() const { return error_; }
59  virtual void Destroy(bool wait) { SignalThread::Destroy(wait); }
60
61  const std::vector<IPAddress>& addresses() const { return addresses_; }
62  void set_error(int error) { error_ = error; }
63
64 protected:
65  virtual void DoWork();
66  virtual void OnWorkDone();
67
68 private:
69  SocketAddress addr_;
70  std::vector<IPAddress> addresses_;
71  int error_;
72};
73
74// talk_base namespaced wrappers for inet_ntop and inet_pton so we can avoid
75// the windows-native versions of these.
76const char* inet_ntop(int af, const void *src, char* dst, socklen_t size);
77int inet_pton(int af, const char* src, void *dst);
78
79bool HasIPv6Enabled();
80}  // namespace talk_base
81
82#endif  // TALK_BASE_NETHELPERS_H_
83