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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMECAST_DEVICE_BLUETOOTH_LE_GATT_CLIENT_MANAGER_IMPL_H_
#define CHROMECAST_DEVICE_BLUETOOTH_LE_GATT_CLIENT_MANAGER_IMPL_H_
#include <deque>
#include <map>
#include <set>
#include <utility>
#include <vector>
#include "base/observer_list_threadsafe.h"
#include "base/task/single_thread_task_runner.h"
#include "base/timer/timer.h"
#include "chromecast/device/bluetooth/le/ble_notification_logger.h"
#include "chromecast/device/bluetooth/le/gatt_client_manager.h"
#include "chromecast/device/bluetooth/shlib/gatt_client.h"
#include "chromecast/public/bluetooth/gatt.h"
namespace chromecast {
namespace bluetooth {
class RemoteDeviceImpl;
class GattClientManagerImpl
: public GattClientManager,
public bluetooth_v2_shlib::Gatt::Client::Delegate {
public:
// If a Connect request takes longer than this amount of time, we will treat
// it as a failure.
static constexpr base::TimeDelta kConnectTimeout = base::Seconds(40);
// If a Disconnect request takes longer than this amount of time, we will
// treat it as a failure.
static constexpr base::TimeDelta kDisconnectTimeout = base::Seconds(10);
// If a ReadRemoteRssi request takes longer than this amount of time, we will
// treat it as a failure.
static constexpr base::TimeDelta kReadRemoteRssiTimeout = base::Seconds(10);
explicit GattClientManagerImpl(bluetooth_v2_shlib::GattClient* gatt_client);
GattClientManagerImpl(const GattClientManagerImpl&) = delete;
GattClientManagerImpl& operator=(const GattClientManagerImpl&) = delete;
~GattClientManagerImpl() override;
void InitializeOnIoThread();
// GattClientManager implementation:
void Initialize(
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner) override;
void Finalize() override;
void AddObserver(Observer* o) override;
void RemoveObserver(Observer* o) override;
void GetDevice(
const bluetooth_v2_shlib::Addr& addr,
base::OnceCallback<void(scoped_refptr<RemoteDevice>)> cb) override;
scoped_refptr<RemoteDevice> GetDeviceSync(
const bluetooth_v2_shlib::Addr& addr) override;
void GetConnectedDevices(GetConnectDevicesCallback cb) override;
void GetNumConnected(base::OnceCallback<void(size_t)> cb) const override;
void NotifyConnect(const bluetooth_v2_shlib::Addr& addr) override;
void NotifyBonded(const bluetooth_v2_shlib::Addr& addr) override;
bool IsConnectedLeDevice(const bluetooth_v2_shlib::Addr& addr) override;
bool SetGattClientConnectable(bool connectable) override;
void DisconnectAll(StatusCallback cb) override;
scoped_refptr<base::SingleThreadTaskRunner> task_runner() override;
// Add a Connect or Disconnect request to the queue. |is_connect| is true for
// Connect request and false for Disconnect request. They can only be executed
// serially. |transport| need only be set if is_connect == true and you wish
// to force a BT Classic or LE connection.
void EnqueueConnectRequest(
const bluetooth_v2_shlib::Addr& addr,
bool is_connect,
bluetooth_v2_shlib::Gatt::Client::Transport transport = bluetooth_v2_shlib::Gatt::Client::Transport::kAuto);
// Add a ReadRemoteRssi request to the queue. They can only be executed
// serially.
void EnqueueReadRemoteRssiRequest(const bluetooth_v2_shlib::Addr& addr);
// TODO(bcf): Should be private and passed into objects which need it (e.g.
// RemoteDevice, RemoteCharacteristic).
bluetooth_v2_shlib::GattClient* gatt_client() const { return gatt_client_; }
bool gatt_client_connectable() const { return gatt_client_connectable_; }
private:
// bluetooth_v2_shlib::Gatt::Client::Delegate implementation:
void OnConnectChanged(const bluetooth_v2_shlib::Addr& addr,
bool status,
bool connected) override;
void OnBondChanged(const bluetooth_v2_shlib::Addr& addr,
bool status,
bool bonded) override;
void OnNotification(const bluetooth_v2_shlib::Addr& addr,
uint16_t handle,
const std::vector<uint8_t>& value) override;
void OnCharacteristicReadResponse(const bluetooth_v2_shlib::Addr& addr,
bool status,
uint16_t handle,
const std::vector<uint8_t>& value) override;
void OnCharacteristicWriteResponse(const bluetooth_v2_shlib::Addr& addr,
bool status,
uint16_t handle) override;
void OnDescriptorReadResponse(const bluetooth_v2_shlib::Addr& addr,
bool status,
uint16_t handle,
const std::vector<uint8_t>& value) override;
void OnDescriptorWriteResponse(const bluetooth_v2_shlib::Addr& addr,
bool status,
uint16_t handle) override;
void OnReadRemoteRssi(const bluetooth_v2_shlib::Addr& addr,
bool status,
int rssi) override;
void OnMtuChanged(const bluetooth_v2_shlib::Addr& addr,
bool status,
int mtu) override;
void OnGetServices(
const bluetooth_v2_shlib::Addr& addr,
const std::vector<bluetooth_v2_shlib::Gatt::Service>& services) override;
void OnServicesRemoved(const bluetooth_v2_shlib::Addr& addr,
uint16_t start_handle,
uint16_t end_handle) override;
void OnServicesAdded(
const bluetooth_v2_shlib::Addr& addr,
const std::vector<bluetooth_v2_shlib::Gatt::Service>& services) override;
void RunQueuedConnectRequest();
void RunQueuedReadRemoteRssiRequest();
void DisconnectAllComplete(bool success);
void OnConnectTimeout(const bluetooth_v2_shlib::Addr& addr);
void OnDisconnectTimeout(const bluetooth_v2_shlib::Addr& addr);
void OnReadRemoteRssiTimeout(const bluetooth_v2_shlib::Addr& addr);
void FinalizeOnIoThread();
bluetooth_v2_shlib::GattClient* const gatt_client_;
scoped_refptr<base::ObserverListThreadSafe<Observer>> observers_;
// All bluetooth_v2_shlib calls are run on this task_runner. Following members
// must only be accessed on this task runner.
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
// TODO(bcf): Need to delete on disconnect.
std::map<bluetooth_v2_shlib::Addr, scoped_refptr<RemoteDeviceImpl>>
addr_to_device_;
std::set<bluetooth_v2_shlib::Addr> connected_devices_;
// Timer for pending Connect requests. If any Connect request times out, we
// will treat it as a failure.
base::OneShotTimer connect_timeout_timer_;
// Timer for pending Disconnect requests. If any Disconnect request times out,
// we will treat it as a failure.
base::OneShotTimer disconnect_timeout_timer_;
// Timer for pending ReadRemoteRssi requests. If any ReadRemoteRssi request
// times out, we will treat it as a failure.
base::OneShotTimer read_remote_rssi_timeout_timer_;
// Queue for concurrent Connect/Disconnect requests. Each request is
// represented using a <addr, is_connect> pair. |is_connect| is true for
// Connect requests and false for Disconnect requests.
struct PendingRequest {
PendingRequest(const bluetooth_v2_shlib::Addr& addr,
bool is_connect,
bluetooth_v2_shlib::Gatt::Client::Transport transport);
~PendingRequest();
bluetooth_v2_shlib::Addr addr;
bool is_connect;
bluetooth_v2_shlib::Gatt::Client::Transport transport;
};
std::deque<PendingRequest> pending_connect_requests_;
bool disconnect_all_pending_ = false;
// True if we are allowed connect to a remote device. This value should be set
// false when device is in GATT server mode.
bool gatt_client_connectable_ = true;
// Callback of DisconnectAll request.
StatusCallback disconnect_all_cb_;
// Queue for concurrent ReadRemoteRssi requests.
std::deque<bluetooth_v2_shlib::Addr> pending_read_remote_rssi_requests_;
BleNotificationLogger notification_logger_;
base::WeakPtr<GattClientManagerImpl> weak_this_;
std::unique_ptr<base::WeakPtrFactory<GattClientManagerImpl>> weak_factory_;
};
} // namespace bluetooth
} // namespace chromecast
#endif // CHROMECAST_DEVICE_BLUETOOTH_LE_GATT_CLIENT_MANAGER_IMPL_H_