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 // Destroys the current DnsTransactionFactory and creates a new one 26 // according to |config|, unless it is invalid or has |unhandled_options|. 27 virtual void SetConfig(const DnsConfig& config) = 0; 28 29 // Returns NULL if the current config is not valid. 30 virtual const DnsConfig* GetConfig() const = 0; 31 32 // Returns NULL if the current config is not valid. 33 virtual DnsTransactionFactory* GetTransactionFactory() = 0; 34 35 // Returns NULL if the current config is not valid. 36 virtual AddressSorter* GetAddressSorter() = 0; 37 38 // Creates default client. 39 static scoped_ptr<DnsClient> CreateClient(NetLog* net_log); 40 }; 41 42 } // namespace net 43 44 #endif // NET_DNS_DNS_CLIENT_H_ 45 46
