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   ~BluetoothConnection() override;
  37
  38   // Connection:
  39   void Connect() override;
  40   void Disconnect() override;
  41
  42  protected:
  43   // Connection:
  44   void SendMessageImpl(scoped_ptr<WireMessage> message) override;
  45
  46   // BluetoothAdapter::Observer:
  47   void DeviceRemoved(device::BluetoothAdapter* adapter,
  48                      device::BluetoothDevice* device) override;
  49
  50  private:
  51   // Registers receive callbacks with the backing |socket_|.
  52   void StartReceive();
  53
  54   // Callbacks for asynchronous Bluetooth operations.
  55   void OnAdapterInitialized(scoped_refptr<device::BluetoothAdapter> adapter);
  56   void OnConnected(scoped_refptr<device::BluetoothSocket> socket);
  57   void OnConnectionError(const std::string& error_message);
  58   void OnSend(int bytes_sent);
  59   void OnSendError(const std::string& error_message);
  60   void OnReceive(int bytes_received, scoped_refptr<net::IOBuffer> buffer);
  61   void OnReceiveError(device::BluetoothSocket::ErrorReason error_reason,
  62                       const std::string& error_message);
  63
  64   // The UUID (universally unique identifier) of the Bluetooth service on the
  65   // remote device that |this| connection should connect to.
  66   const device::BluetoothUUID uuid_;
  67
  68   // The Bluetooth adapter over which this connection is made. Non-null iff
  69   // |this| connection is registered as an observer of the |adapter_|.
  70   scoped_refptr<device::BluetoothAdapter> adapter_;
  71
  72   // The Bluetooth socket that backs this connection. NULL iff the connection is
  73   // not in a connected state.
  74   scoped_refptr<device::BluetoothSocket> socket_;
  75
  76   // The message that was sent over the backing |socket_|. NULL iff there is no
  77   // send operation in progress.
  78   scoped_ptr<WireMessage> pending_message_;
  79
  80   base::WeakPtrFactory<BluetoothConnection> weak_ptr_factory_;
  81
  82   DISALLOW_COPY_AND_ASSIGN(BluetoothConnection);
  83 };
  84
  85 }  // namespace proximity_auth
  86
  87 #endif  // COMPONENTS_PROXIMITY_AUTH_BLUETOOTH_CONNECTION_H