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// 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/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "components/cryptauth/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 cryptauth {
struct RemoteDevice;
}
namespace proximity_auth {
// Represents a Bluetooth connection with a remote device. The connection is a
// persistent bidirectional channel for sending and receiving wire messages.
class BluetoothConnection : public cryptauth::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 cryptauth::RemoteDevice& remote_device,
const device::BluetoothUUID& uuid);
~BluetoothConnection() override;
// Connection:
void Connect() override;
void Disconnect() override;
protected:
// Connection:
void SendMessageImpl(
std::unique_ptr<cryptauth::WireMessage> message) override;
// BluetoothAdapter::Observer:
void DeviceChanged(device::BluetoothAdapter* adapter,
device::BluetoothDevice* device) override;
void DeviceRemoved(device::BluetoothAdapter* adapter,
device::BluetoothDevice* device) override;
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.
std::unique_ptr<cryptauth::WireMessage> pending_message_;
base::WeakPtrFactory<BluetoothConnection> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(BluetoothConnection);
};
} // namespace proximity_auth
#endif // COMPONENTS_PROXIMITY_AUTH_BLUETOOTH_CONNECTION_H
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