1 // Copyright (c) 2011 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 CONTENT_RENDERER_P2P_HOST_ADDRESS_REQUEST_H_ 6 #define CONTENT_RENDERER_P2P_HOST_ADDRESS_REQUEST_H_ 7 8 #include <string> 9 10 #include "base/callback.h" 11 #include "base/memory/ref_counted.h" 12 #include "content/common/content_export.h" 13 #include "net/base/net_util.h" 14 #include "third_party/libjingle/source/talk/base/asyncresolverinterface.h" 15 16 namespace base { 17 class MessageLoop; 18 class MessageLoopProxy; 19 } // namespace base 20 21 namespace content { 22 23 class P2PSocketDispatcher; 24 25 // P2PAsyncAddressResolver performs DNS hostname resolution. It's used 26 // to resolve addresses of STUN and relay servers. 27 class P2PAsyncAddressResolver 28 : public base::RefCountedThreadSafe<P2PAsyncAddressResolver> { 29 public: 30 typedef base::Callback<void(const net::IPAddressList&)> DoneCallback; 31 32 P2PAsyncAddressResolver(P2PSocketDispatcher* dispatcher); 33 // Start address resolve process. 34 void Start(const talk_base::SocketAddress& addr, 35 const DoneCallback& done_callback); 36 // Clients must unregister before exiting for cleanup. 37 void Cancel(); 38 39 private: 40 enum State { 41 STATE_CREATED, 42 STATE_SENT, 43 STATE_FINISHED, 44 }; 45 46 friend class P2PSocketDispatcher; 47 48 friend class base::RefCountedThreadSafe<P2PAsyncAddressResolver>; 49 50 virtual ~P2PAsyncAddressResolver(); 51 52 void DoSendRequest(const talk_base::SocketAddress& host_name, 53 const DoneCallback& done_callback); 54 void DoUnregister(); 55 void OnResponse(const net::IPAddressList& address); 56 void DeliverResponse(const net::IPAddressList& address); 57 58 P2PSocketDispatcher* dispatcher_; 59 scoped_refptr<base::MessageLoopProxy> ipc_message_loop_; 60 scoped_refptr<base::MessageLoopProxy> delegate_message_loop_; 61 62 // State must be accessed from delegate thread only. 63 State state_; 64 65 // Accessed on the IPC thread only. 66 int32 request_id_; 67 bool registered_; 68 std::vector<talk_base::IPAddress> addresses_; 69 DoneCallback done_callback_; 70 71 DISALLOW_COPY_AND_ASSIGN(P2PAsyncAddressResolver); 72 }; 73 74 } // namespace content 75 76 #endif // CONTENT_RENDERER_P2P_HOST_ADDRESS_REQUEST_H_ 77