[Easy Unlock] Port the BluetoothConnection class to native code.

components/proximity_auth/bluetooth_connection.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_PROXIMITY_AUTH_BLUETOOTH_CONNECTION_H
+#define COMPONENTS_PROXIMITY_AUTH_BLUETOOTH_CONNECTION_H
+
+#include <string>
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "components/proximity_auth/connection.h"
+#include "device/bluetooth/bluetooth_adapter.h"
+#include "device/bluetooth/bluetooth_device.h"
+#include "device/bluetooth/bluetooth_socket.h"
+#include "device/bluetooth/bluetooth_uuid.h"
+
+namespace net {
+class IOBuffer;
+}
+
+namespace proximity_auth {
+
+struct RemoteDevice;
+
+// Represents a Bluetooth connection with a remote device. The connection is a
+// persistent bidirectional channel for sending and receiving wire messages.
+class BluetoothConnection : public Connection,
+                            public device::BluetoothAdapter::Observer {
+ public:
+  // Constructs a Bluetooth connection to the service with |uuid| on the
+  // |remote_device|. The |remote_device| must already be known to the system
+  // Bluetooth daemon.
+  BluetoothConnection(const RemoteDevice& remote_device,
+                      const device::BluetoothUUID& uuid);
+  virtual ~BluetoothConnection();
+
+ protected:
+  // Connection:
+  virtual void Connect() OVERRIDE;
+  virtual void Disconnect() OVERRIDE;
+  virtual void SendMessageImpl(scoped_ptr<WireMessage> message) OVERRIDE;
+
+  // BluetoothAdapter::Observer:
+  virtual void DeviceRemoved(device::BluetoothAdapter* adapter,
+                             device::BluetoothDevice* device) OVERRIDE;
+
+  // Exposed for testing.
+  virtual void ConnectToService(
+      device::BluetoothDevice* device,
+      const device::BluetoothUUID& uuid,
+      const device::BluetoothDevice::ConnectToServiceCallback& callback,
+      const device::BluetoothDevice::ConnectToServiceErrorCallback&
+          error_callback);
+
+ private:
+  // Registers receive callbacks with the backing |socket_|.
+  void StartReceive();
+
+  // Callbacks for asynchronous Bluetooth operations.
+  void OnAdapterInitialized(scoped_refptr<device::BluetoothAdapter> adapter);
+  void OnConnected(scoped_refptr<device::BluetoothSocket> socket);
+  void OnConnectionError(const std::string& error_message);
+  void OnSend(int bytes_sent);
+  void OnSendError(const std::string& error_message);
+  void OnReceive(int bytes_received, scoped_refptr<net::IOBuffer> buffer);
+  void OnReceiveError(device::BluetoothSocket::ErrorReason error_reason,
+                      const std::string& error_message);
+
+  // The UUID (universally unique identifier) of the Bluetooth service on the
+  // remote device that |this| connection should connect to.
+  const device::BluetoothUUID uuid_;
+
+  // The Bluetooth adapter over which this connection is made. Non-null iff
+  // |this| connection is registered as an observer of the |adapter_|.
+  scoped_refptr<device::BluetoothAdapter> adapter_;
+
+  // The Bluetooth socket that backs this connection. NULL iff the connection is
+  // not in a connected state.
+  scoped_refptr<device::BluetoothSocket> socket_;
+
+  // The message that was sent over the backing |socket_|. NULL iff there is no
+  // send operation in progress.
+  scoped_ptr<WireMessage> pending_message_;
+
+  base::WeakPtrFactory<BluetoothConnection> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(BluetoothConnection);
+};
+
+}  // namespace proximity_auth
+
+#endif  // COMPONENTS_PROXIMITY_AUTH_BLUETOOTH_CONNECTION_H