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 34 namespace talk_base { 35 36 // This interface defines the methods to resolve the address asynchronously. 37 class AsyncResolverInterface { 38 public: AsyncResolverInterface()39 AsyncResolverInterface() {} ~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. address()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