src/components/proximity_auth/bluetooth_connection.h

   1 // Copyright 2014 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 COMPONENTS_PROXIMITY_AUTH_BLUETOOTH_CONNECTION_H
   6 #define COMPONENTS_PROXIMITY_AUTH_BLUETOOTH_CONNECTION_H
   7
   8 #include <string>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "components/proximity_auth/connection.h"
  13 #include "device/bluetooth/bluetooth_adapter.h"
  14 #include "device/bluetooth/bluetooth_device.h"
  15 #include "device/bluetooth/bluetooth_socket.h"
  16 #include "device/bluetooth/bluetooth_uuid.h"
  17
  18 namespace net {
  19 class IOBuffer;
  20 }
  21
  22 namespace proximity_auth {
  23
  24 struct RemoteDevice;
  25
  26 // Represents a Bluetooth connection with a remote device. The connection is a
  27 // persistent bidirectional channel for sending and receiving wire messages.
  28 class BluetoothConnection : public Connection,
  29                             public device::BluetoothAdapter::Observer {
  30  public:
  31   // Constructs a Bluetooth connection to the service with |uuid| on the
  32   // |remote_device|. The |remote_device| must already be known to the system
  33   // Bluetooth daemon.
  34   BluetoothConnection(const RemoteDevice& remote_device,
  35                       const device::BluetoothUUID& uuid);
  36   virtual ~BluetoothConnection();
  37
  38  protected:
  39   // Connection:
  40   virtual void Connect() OVERRIDE;
  41   virtual void Disconnect() OVERRIDE;
  42   virtual void SendMessageImpl(scoped_ptr<WireMessage> message) OVERRIDE;
  43
  44   // BluetoothAdapter::Observer:
  45   virtual void DeviceRemoved(device::BluetoothAdapter* adapter,
  46                              device::BluetoothDevice* device) OVERRIDE;
  47
  48   // Exposed for testing.
  49   virtual void ConnectToService(
  50       device::BluetoothDevice* device,
  51       const device::BluetoothUUID& uuid,
  52       const device::BluetoothDevice::ConnectToServiceCallback& callback,
  53       const device::BluetoothDevice::ConnectToServiceErrorCallback&
  54           error_callback);
  55
  56  private:
  57   // Registers receive callbacks with the backing |socket_|.
  58   void StartReceive();
  59
  60   // Callbacks for asynchronous Bluetooth operations.
  61   void OnAdapterInitialized(scoped_refptr<device::BluetoothAdapter> adapter);
  62   void OnConnected(scoped_refptr<device::BluetoothSocket> socket);
  63   void OnConnectionError(const std::string& error_message);
  64   void OnSend(int bytes_sent);
  65   void OnSendError(const std::string& error_message);
  66   void OnReceive(int bytes_received, scoped_refptr<net::IOBuffer> buffer);
  67   void OnReceiveError(device::BluetoothSocket::ErrorReason error_reason,
  68                       const std::string& error_message);
  69
  70   // The UUID (universally unique identifier) of the Bluetooth service on the
  71   // remote device that |this| connection should connect to.
  72   const device::BluetoothUUID uuid_;
  73
  74   // The Bluetooth adapter over which this connection is made. Non-null iff
  75   // |this| connection is registered as an observer of the |adapter_|.
  76   scoped_refptr<device::BluetoothAdapter> adapter_;
  77
  78   // The Bluetooth socket that backs this connection. NULL iff the connection is
  79   // not in a connected state.
  80   scoped_refptr<device::BluetoothSocket> socket_;
  81
  82   // The message that was sent over the backing |socket_|. NULL iff there is no
  83   // send operation in progress.
  84   scoped_ptr<WireMessage> pending_message_;
  85
  86   base::WeakPtrFactory<BluetoothConnection> weak_ptr_factory_;
  87
  88   DISALLOW_COPY_AND_ASSIGN(BluetoothConnection);
  89 };
  90
  91 }  // namespace proximity_auth
  92
  93 #endif  // COMPONENTS_PROXIMITY_AUTH_BLUETOOTH_CONNECTION_H