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// Copyright 2015 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_REMOTE_DEVICE_LIFE_CYCLE_IMPL_H
#define COMPONENTS_PROXIMITY_AUTH_REMOTE_DEVICE_LIFE_CYCLE_IMPL_H
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/timer/timer.h"
#include "components/proximity_auth/authenticator.h"
#include "components/proximity_auth/messenger_observer.h"
#include "components/proximity_auth/remote_device.h"
#include "components/proximity_auth/remote_device_life_cycle.h"
namespace proximity_auth {
class BluetoothThrottler;
class BluetoothLowEnergyDeviceWhitelist;
class Messenger;
class Connection;
class ConnectionFinder;
class ProximityAuthClient;
class SecureContext;
// Implementation of RemoteDeviceLifeCycle.
class RemoteDeviceLifeCycleImpl : public RemoteDeviceLifeCycle,
public MessengerObserver {
public:
// Creates the life cycle for controlling the given |remote_device|.
// |proximity_auth_client| is not owned.
RemoteDeviceLifeCycleImpl(const RemoteDevice& remote_device,
ProximityAuthClient* proximity_auth_client);
~RemoteDeviceLifeCycleImpl() override;
// RemoteDeviceLifeCycle:
void Start() override;
RemoteDevice GetRemoteDevice() const override;
RemoteDeviceLifeCycle::State GetState() const override;
Messenger* GetMessenger() override;
void AddObserver(Observer* observer) override;
void RemoveObserver(Observer* observer) override;
protected:
// Creates and returns a ConnectionFinder instance for |remote_device_|.
// Exposed for testing.
virtual scoped_ptr<ConnectionFinder> CreateConnectionFinder();
// Creates and returns an Authenticator instance for |connection_|.
// Exposed for testing.
virtual scoped_ptr<Authenticator> CreateAuthenticator();
private:
// Transitions to |new_state|, and notifies observers.
void TransitionToState(RemoteDeviceLifeCycle::State new_state);
// Transtitions to FINDING_CONNECTION state. Creates and starts
// |connection_finder_|.
void FindConnection();
// Called when |connection_finder_| finds a connection.
void OnConnectionFound(scoped_ptr<Connection> connection);
// Callback when |authenticator_| completes authentication.
void OnAuthenticationResult(Authenticator::Result result,
scoped_ptr<SecureContext> secure_context);
// Creates the messenger which parses status updates.
void CreateMessenger();
// MessengerObserver:
void OnDisconnected() override;
// The remote device being controlled.
const RemoteDevice remote_device_;
// Used to grab dependencies in chrome. Not owned.
ProximityAuthClient* proximity_auth_client_;
// The current state in the life cycle.
RemoteDeviceLifeCycle::State state_;
// Observers added to the life cycle. Configured as NOTIFY_EXISTING_ONLY.
base::ObserverList<Observer> observers_;
// The connection that is established by |connection_finder_|.
scoped_ptr<Connection> connection_;
// Context for encrypting and decrypting messages. Created after
// authentication succeeds. Ownership is eventually passed to |messenger_|.
scoped_ptr<SecureContext> secure_context_;
// The messenger for sending and receiving messages in the
// SECURE_CHANNEL_ESTABLISHED state.
scoped_ptr<Messenger> messenger_;
// Authenticates the remote device after it is connected. Used in the
// AUTHENTICATING state.
scoped_ptr<Authenticator> authenticator_;
// Used in the FINDING_CONNECTION state to establish a connection to the
// remote device.
scoped_ptr<ConnectionFinder> connection_finder_;
// Rate limits Bluetooth connections to the same device. Used to in the
// created ConnectionFinder.
scoped_ptr<BluetoothThrottler> bluetooth_throttler_;
// After authentication fails, this timer waits for a period of time before
// retrying the connection.
base::OneShotTimer authentication_recovery_timer_;
base::WeakPtrFactory<RemoteDeviceLifeCycleImpl> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(RemoteDeviceLifeCycleImpl);
};
} // namespace proximity_auth
#endif // COMPONENTS_PROXIMITY_AUTH_REMOTE_DEVICE_LIFE_CYCLE_IMPL_H
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