1 // 2 // Copyright (C) 2013 The Android Open Source Project 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 17 #ifndef SHILL_EAP_LISTENER_H_ 18 #define SHILL_EAP_LISTENER_H_ 19 20 #include <memory> 21 22 #include <base/callback.h> 23 #include <base/macros.h> 24 25 namespace shill { 26 27 class EventDispatcher; 28 class IOHandler; 29 class ScopedSocketCloser; 30 class Sockets; 31 32 // Listens for EAP packets on |interface_index| and invokes a 33 // callback when a request frame arrives. 34 class EapListener { 35 public: 36 typedef base::Callback<void()> EapRequestReceivedCallback; 37 38 explicit EapListener(EventDispatcher* event_dispatcher, 39 int interface_index); 40 virtual ~EapListener(); 41 42 // Create a socket for tranmission and reception. Returns true 43 // if successful, false otherwise. 44 virtual bool Start(); 45 46 // Destroy the client socket. 47 virtual void Stop(); 48 49 // Setter for |request_received_callback_|. 50 virtual void set_request_received_callback( 51 const EapRequestReceivedCallback& callback) { 52 request_received_callback_ = callback; 53 } 54 55 private: 56 friend class EapListenerTest; 57 58 // The largest EAP packet we expect to receive. 59 static const size_t kMaxEapPacketLength; 60 61 // Creates |socket_|. Returns true on succes, false on failure. 62 bool CreateSocket(); 63 64 // Retrieves an EAP packet from |socket_|. This is the callback method 65 // configured on |receive_request_handler_|. 66 void ReceiveRequest(int fd); 67 68 // Event dispatcher to use for creating an input handler. 69 EventDispatcher* dispatcher_; 70 71 // The interface index fo the device to monitor. 72 const int interface_index_; 73 74 // Callback handle to invoke when an EAP request is received. 75 EapRequestReceivedCallback request_received_callback_; 76 77 // Sockets instance to perform socket calls on. 78 std::unique_ptr<Sockets> sockets_; 79 80 // Receive socket configured to receive PAE (Port Access Entity) packets. 81 int socket_; 82 83 // Scoped socket closer for the receive |socket_|. 84 std::unique_ptr<ScopedSocketCloser> socket_closer_; 85 86 // Input handler for |socket_|. Calls ReceiveRequest(). 87 std::unique_ptr<IOHandler> receive_request_handler_; 88 89 DISALLOW_COPY_AND_ASSIGN(EapListener); 90 }; 91 92 } // namespace shill 93 94 #endif // SHILL_EAP_LISTENER_H_ 95
