1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef NET_DNS_DNS_CLIENT_H_ 6 #define NET_DNS_DNS_CLIENT_H_ 7 8 #include "base/memory/scoped_ptr.h" 9 #include "net/base/net_export.h" 10 11 namespace net { 12 13 class AddressSorter; 14 struct DnsConfig; 15 class DnsTransactionFactory; 16 class NetLog; 17 18 // Convenience wrapper which allows easy injection of DnsTransaction into 19 // HostResolverImpl. Pointers returned by the Get* methods are only guaranteed 20 // to remain valid until next time SetConfig is called. 21 class NET_EXPORT DnsClient { 22 public: 23 virtual ~DnsClient() {} 24 25 // Creates a new DnsTransactionFactory according to the new |config|. 26 virtual void SetConfig(const DnsConfig& config) = 0; 27 28 // Returns NULL if the current config is not valid. 29 virtual const DnsConfig* GetConfig() const = 0; 30 31 // Returns NULL if the current config is not valid. 32 virtual DnsTransactionFactory* GetTransactionFactory() = 0; 33 34 // Returns NULL if the current config is not valid. 35 virtual AddressSorter* GetAddressSorter() = 0; 36 37 // Creates default client. 38 static scoped_ptr<DnsClient> CreateClient(NetLog* net_log); 39 }; 40 41 } // namespace net 42 43 #endif // NET_DNS_DNS_CLIENT_H_ 44 45
