1/*
2 * libjingle
3 * Copyright 2013, 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_ASYNCRESOLVERINTERFACE_H_
29#define TALK_BASE_ASYNCRESOLVERINTERFACE_H_
30
31#include "talk/base/sigslot.h"
32#include "talk/base/socketaddress.h"
33
34namespace talk_base {
35
36// This interface defines the methods to resolve the address asynchronously.
37class AsyncResolverInterface {
38 public:
39  AsyncResolverInterface() {}
40  virtual ~AsyncResolverInterface() {}
41
42  // Start address resolve process.
43  virtual void Start(const SocketAddress& addr) = 0;
44  // Returns top most resolved address of |family|
45  virtual bool GetResolvedAddress(int family, SocketAddress* addr) const = 0;
46  // Returns error from resolver.
47  virtual int GetError() const = 0;
48  // Delete the resolver.
49  virtual void Destroy(bool wait) = 0;
50  // Returns top most resolved IPv4 address if address is resolved successfully.
51  // Otherwise returns address set in SetAddress.
52  SocketAddress address() const {
53    SocketAddress addr;
54    GetResolvedAddress(AF_INET, &addr);
55    return addr;
56  }
57
58  // This signal is fired when address resolve process is completed.
59  sigslot::signal1<AsyncResolverInterface*> SignalDone;
60};
61
62}  // namespace talk_base
63
64#endif
65