1/*
2 *  Copyright 2013 The WebRTC Project Authors. All rights reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef WEBRTC_BASE_ASYNCRESOLVERINTERFACE_H_
12#define WEBRTC_BASE_ASYNCRESOLVERINTERFACE_H_
13
14#include "webrtc/base/sigslot.h"
15#include "webrtc/base/socketaddress.h"
16
17namespace rtc {
18
19// This interface defines the methods to resolve the address asynchronously.
20class AsyncResolverInterface {
21 public:
22  AsyncResolverInterface() {}
23  virtual ~AsyncResolverInterface() {}
24
25  // Start address resolve process.
26  virtual void Start(const SocketAddress& addr) = 0;
27  // Returns top most resolved address of |family|
28  virtual bool GetResolvedAddress(int family, SocketAddress* addr) const = 0;
29  // Returns error from resolver.
30  virtual int GetError() const = 0;
31  // Delete the resolver.
32  virtual void Destroy(bool wait) = 0;
33  // Returns top most resolved IPv4 address if address is resolved successfully.
34  // Otherwise returns address set in SetAddress.
35  SocketAddress address() const {
36    SocketAddress addr;
37    GetResolvedAddress(AF_INET, &addr);
38    return addr;
39  }
40
41  // This signal is fired when address resolve process is completed.
42  sigslot::signal1<AsyncResolverInterface*> SignalDone;
43};
44
45}  // namespace rtc
46
47#endif
48