mirror of
https://github.com/kidfromjupiter/nearby.git
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181 lines
7.7 KiB
C++
181 lines
7.7 KiB
C++
// Copyright 2022-2023 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_IMPLEMENTATION_WINDOWS_BLE_V2_H_
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#define THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_IMPLEMENTATION_WINDOWS_BLE_V2_H_
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#include <algorithm>
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#include <cstdint>
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#include <memory>
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#include <string>
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#include "absl/base/thread_annotations.h"
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#include "absl/container/flat_hash_map.h"
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#include "absl/strings/string_view.h"
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#include "absl/synchronization/mutex.h"
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#include "absl/synchronization/notification.h"
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#include "absl/time/clock.h"
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#include "absl/time/time.h"
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#include "internal/platform/cancellation_flag.h"
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#include "internal/platform/implementation/ble_v2.h"
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#include "internal/platform/implementation/bluetooth_adapter.h"
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#include "internal/platform/implementation/windows/ble_gatt_server.h"
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#include "internal/platform/implementation/windows/ble_v2_peripheral.h"
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#include "internal/platform/implementation/windows/bluetooth_adapter.h"
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#include "internal/platform/uuid.h"
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#include "winrt/Windows.Devices.Bluetooth.Advertisement.h"
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namespace nearby {
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namespace windows {
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// Container of operations that can be performed over the BLE medium.
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class BleV2Medium : public api::ble_v2::BleMedium {
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public:
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explicit BleV2Medium(api::BluetoothAdapter& adapter);
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~BleV2Medium() override = default;
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// Returns true once the Ble advertising has been initiated.
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bool StartAdvertising(
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const api::ble_v2::BleAdvertisementData& advertising_data,
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api::ble_v2::AdvertiseParameters advertising_parameters) override
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ABSL_LOCKS_EXCLUDED(mutex_);
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bool StopAdvertising() override ABSL_LOCKS_EXCLUDED(mutex_);
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std::unique_ptr<AdvertisingSession> StartAdvertising(
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const api::ble_v2::BleAdvertisementData& advertising_data,
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api::ble_v2::AdvertiseParameters advertise_set_parameters,
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AdvertisingCallback callback) override ABSL_LOCKS_EXCLUDED(mutex_);
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bool StartScanning(const Uuid& service_uuid,
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api::ble_v2::TxPowerLevel tx_power_level,
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ScanCallback callback) override
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ABSL_LOCKS_EXCLUDED(mutex_);
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bool StopScanning() override ABSL_LOCKS_EXCLUDED(mutex_);
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std::unique_ptr<ScanningSession> StartScanning(
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const Uuid& service_uuid, api::ble_v2::TxPowerLevel tx_power_level,
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ScanningCallback callback) override;
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std::unique_ptr<api::ble_v2::GattServer> StartGattServer(
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api::ble_v2::ServerGattConnectionCallback callback) override
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ABSL_LOCKS_EXCLUDED(mutex_);
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std::unique_ptr<api::ble_v2::GattClient> ConnectToGattServer(
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api::ble_v2::BlePeripheral& peripheral,
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api::ble_v2::TxPowerLevel tx_power_level,
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api::ble_v2::ClientGattConnectionCallback callback) override
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ABSL_LOCKS_EXCLUDED(mutex_);
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std::unique_ptr<api::ble_v2::BleServerSocket> OpenServerSocket(
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const std::string& service_id) override ABSL_LOCKS_EXCLUDED(mutex_);
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std::unique_ptr<api::ble_v2::BleSocket> Connect(
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const std::string& service_id, api::ble_v2::TxPowerLevel tx_power_level,
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api::ble_v2::BlePeripheral& remote_peripheral,
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CancellationFlag* cancellation_flag) override ABSL_LOCKS_EXCLUDED(mutex_);
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bool IsExtendedAdvertisementsAvailable() override;
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bool GetRemotePeripheral(const std::string& mac_address,
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GetRemotePeripheralCallback callback) override
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ABSL_LOCKS_EXCLUDED(mutex_);
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bool GetRemotePeripheral(api::ble_v2::BlePeripheral::UniqueId id,
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GetRemotePeripheralCallback callback) override
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ABSL_LOCKS_EXCLUDED(mutex_);
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private:
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bool StartBleAdvertising(
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const api::ble_v2::BleAdvertisementData& advertising_data,
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api::ble_v2::AdvertiseParameters advertising_parameters)
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ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
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bool StopBleAdvertising() ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
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bool StartGattAdvertising(
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const api::ble_v2::BleAdvertisementData& advertising_data,
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api::ble_v2::AdvertiseParameters advertising_parameters)
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ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
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bool StopGattAdvertising() ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
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void PublisherHandler(
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winrt::Windows::Devices::Bluetooth::Advertisement::
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BluetoothLEAdvertisementPublisher publisher,
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winrt::Windows::Devices::Bluetooth::Advertisement::
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BluetoothLEAdvertisementPublisherStatusChangedEventArgs args);
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void AdvertisementReceivedHandler(
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winrt::Windows::Devices::Bluetooth::Advertisement::
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BluetoothLEAdvertisementWatcher watcher,
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winrt::Windows::Devices::Bluetooth::Advertisement::
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BluetoothLEAdvertisementReceivedEventArgs args);
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void AdvertisementFoundHandler(
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winrt::Windows::Devices::Bluetooth::Advertisement::
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BluetoothLEAdvertisementWatcher watcher,
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winrt::Windows::Devices::Bluetooth::Advertisement::
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BluetoothLEAdvertisementReceivedEventArgs args);
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void WatcherHandler(winrt::Windows::Devices::Bluetooth::Advertisement::
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BluetoothLEAdvertisementWatcher watcher,
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winrt::Windows::Devices::Bluetooth::Advertisement::
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BluetoothLEAdvertisementWatcherStoppedEventArgs args);
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uint64_t GenerateSessionId() ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
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// Returns nullptr if `address` is invalid.
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BleV2Peripheral* GetOrCreatePeripheral(absl::string_view address)
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ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
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// Returns nullptr if `id` does not match a known peripheral.
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BleV2Peripheral* GetPeripheral(BleV2Peripheral::UniqueId id)
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ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
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void RemoveExpiredPeripherals() ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
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absl::Mutex mutex_;
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BluetoothAdapter* const adapter_;
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Uuid service_uuid_;
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api::ble_v2::TxPowerLevel tx_power_level_;
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ScanCallback scan_callback_;
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// std::map<Uuid, std::map<uint64_t, ScanningCallback>>
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absl::flat_hash_map<Uuid, absl::flat_hash_map<uint64_t, ScanningCallback>>
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service_uuid_to_session_map_ ABSL_GUARDED_BY(mutex_);
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// WinRT objects
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::winrt::Windows::Devices::Bluetooth::Advertisement::
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BluetoothLEAdvertisementPublisher publisher_ ABSL_GUARDED_BY(mutex_) =
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nullptr;
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::winrt::Windows::Devices::Bluetooth::Advertisement::
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BluetoothLEAdvertisementWatcher watcher_ ABSL_GUARDED_BY(mutex_) =
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nullptr;
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bool is_ble_publisher_started_ ABSL_GUARDED_BY(mutex_) = false;
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bool is_gatt_publisher_started_ ABSL_GUARDED_BY(mutex_) = false;
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bool is_watcher_started_ ABSL_GUARDED_BY(mutex_) = false;
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::winrt::event_token publisher_token_ ABSL_GUARDED_BY(mutex_);
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::winrt::event_token watcher_token_ ABSL_GUARDED_BY(mutex_);
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::winrt::event_token advertisement_received_token_ ABSL_GUARDED_BY(mutex_);
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BleGattServer* ble_gatt_server_ = nullptr;
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// Map to protect the pointer for BlePeripheral because
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// DiscoveredPeripheralCallback only keeps the pointer to the object
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struct PeripheralInfo {
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absl::Time last_access_time;
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std::unique_ptr<BleV2Peripheral> peripheral;
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};
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absl::flat_hash_map<BleV2Peripheral::UniqueId, PeripheralInfo> peripheral_map_
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ABSL_GUARDED_BY(mutex_);
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absl::Time cleanup_time_ ABSL_GUARDED_BY(mutex_) = absl::Now();
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};
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} // namespace windows
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} // namespace nearby
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#endif // THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_IMPLEMENTATION_WINDOWS_BLE_V2_H_
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