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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_ASH_COMPONENTS_PROXIMITY_AUTH_REMOTE_DEVICE_LIFE_CYCLE_IMPL_H_
#define CHROMEOS_ASH_COMPONENTS_PROXIMITY_AUTH_REMOTE_DEVICE_LIFE_CYCLE_IMPL_H_
#include <memory>
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/timer/timer.h"
#include "chromeos/ash/components/multidevice/remote_device_ref.h"
#include "chromeos/ash/components/proximity_auth/messenger_observer.h"
#include "chromeos/ash/components/proximity_auth/remote_device_life_cycle.h"
#include "chromeos/ash/services/secure_channel/public/cpp/client/connection_attempt.h"
#include "chromeos/ash/services/secure_channel/public/cpp/client/secure_channel_client.h"
#include "chromeos/ash/services/secure_channel/public/mojom/secure_channel.mojom.h"
namespace ash {
namespace secure_channel {
class ClientChannel;
class SecureChannelClient;
} // namespace secure_channel
} // namespace ash
namespace proximity_auth {
class Messenger;
// Implementation of RemoteDeviceLifeCycle.
class RemoteDeviceLifeCycleImpl
: public RemoteDeviceLifeCycle,
public ash::secure_channel::ConnectionAttempt::Delegate,
public MessengerObserver {
public:
// Creates the life cycle for controlling the given |remote_device|.
// |proximity_auth_client| is not owned.
RemoteDeviceLifeCycleImpl(
ash::multidevice::RemoteDeviceRef remote_device,
std::optional<ash::multidevice::RemoteDeviceRef> local_device,
ash::secure_channel::SecureChannelClient* secure_channel_client);
RemoteDeviceLifeCycleImpl(const RemoteDeviceLifeCycleImpl&) = delete;
RemoteDeviceLifeCycleImpl& operator=(const RemoteDeviceLifeCycleImpl&) =
delete;
~RemoteDeviceLifeCycleImpl() override;
// RemoteDeviceLifeCycle:
void Start() override;
ash::multidevice::RemoteDeviceRef GetRemoteDevice() const override;
ash::secure_channel::ClientChannel* GetChannel() const override;
RemoteDeviceLifeCycle::State GetState() const override;
Messenger* GetMessenger() override;
void AddObserver(Observer* observer) override;
void RemoveObserver(Observer* observer) override;
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();
// Creates the messenger which parses status updates.
void CreateMessenger();
// ash::secure_channel::ConnectionAttempt::Delegate:
void OnConnectionAttemptFailure(
ash::secure_channel::mojom::ConnectionAttemptFailureReason reason)
override;
void OnConnection(
std::unique_ptr<ash::secure_channel::ClientChannel> channel) override;
// MessengerObserver:
void OnDisconnected() override;
// The remote device being controlled.
const ash::multidevice::RemoteDeviceRef remote_device_;
// Represents this device (i.e. this Chromebook) for a particular profile.
std::optional<ash::multidevice::RemoteDeviceRef> local_device_;
// The entrypoint to the SecureChannel API.
raw_ptr<ash::secure_channel::SecureChannelClient> secure_channel_client_;
// The current state in the life cycle.
RemoteDeviceLifeCycle::State state_;
// Observers added to the life cycle.
base::ObserverList<Observer>::Unchecked observers_{
base::ObserverListPolicy::EXISTING_ONLY};
// The messenger for sending and receiving messages in the
// SECURE_CHANNEL_ESTABLISHED state.
std::unique_ptr<Messenger> messenger_;
std::unique_ptr<ash::secure_channel::ConnectionAttempt> connection_attempt_;
// Ownership is eventually passed to |messenger_|.
std::unique_ptr<ash::secure_channel::ClientChannel> channel_;
// 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_{this};
};
} // namespace proximity_auth
#endif // CHROMEOS_ASH_COMPONENTS_PROXIMITY_AUTH_REMOTE_DEVICE_LIFE_CYCLE_IMPL_H_
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