| /* |
| * |
| * Copyright (c) 2020-2021 Project CHIP Authors |
| * Copyright (c) 2015-2017 Nest Labs, Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /** |
| * @file |
| * Provides an implementation of BleConnectionDelegate for Darwin platforms. |
| */ |
| |
| #if !__has_feature(objc_arc) |
| #error This file must be compiled with ARC. Use -fobjc-arc flag (or convert project to ARC). |
| #endif |
| |
| #include <ble/BleConfig.h> |
| #include <ble/BleError.h> |
| #include <ble/BleLayer.h> |
| #include <ble/BleUUID.h> |
| #include <lib/support/logging/CHIPLogging.h> |
| #include <platform/CHIPDeviceLayer.h> |
| #include <platform/Darwin/BleConnectionDelegate.h> |
| #include <platform/Darwin/BleScannerDelegate.h> |
| #include <platform/LockTracker.h> |
| #include <setup_payload/SetupPayload.h> |
| |
| #import "UUIDHelper.h" |
| |
| using namespace chip::Ble; |
| |
| constexpr uint64_t kScanningWithDiscriminatorTimeoutInSeconds = 60; |
| constexpr uint64_t kScanningWithoutDelegateTimeoutInSeconds = 120; |
| constexpr uint64_t kCachePeripheralTimeoutInSeconds |
| = static_cast<uint64_t>(CHIP_DEVICE_CONFIG_BLE_SLOW_ADVERTISING_INTERVAL_MAX / 1000.0 * 8.0 * 0.625); |
| constexpr char kBleWorkQueueName[] = "org.csa-iot.matter.framework.ble.workqueue"; |
| |
| typedef NS_ENUM(uint8_t, BleConnectionMode) { |
| kUndefined = 0, |
| kScanningWithoutDelegate, |
| kScanning, |
| kConnecting, |
| }; |
| |
| @interface BleConnection : NSObject <CBCentralManagerDelegate, CBPeripheralDelegate> |
| |
| @property (strong, nonatomic) dispatch_queue_t chipWorkQueue; |
| @property (strong, nonatomic) dispatch_queue_t workQueue; |
| @property (strong, nonatomic) CBCentralManager * centralManager; |
| @property (strong, nonatomic) CBPeripheral * peripheral; |
| @property (strong, nonatomic) CBUUID * shortServiceUUID; |
| @property (nonatomic, readonly, nullable) dispatch_source_t timer; |
| @property (nonatomic, readonly) BleConnectionMode currentMode; |
| @property (strong, nonatomic) NSMutableDictionary<CBPeripheral *, NSDictionary *> * cachedPeripherals; |
| @property (unsafe_unretained, nonatomic) bool found; |
| @property (unsafe_unretained, nonatomic) chip::SetupDiscriminator deviceDiscriminator; |
| @property (unsafe_unretained, nonatomic) void * appState; |
| @property (unsafe_unretained, nonatomic) BleConnectionDelegate::OnConnectionCompleteFunct onConnectionComplete; |
| @property (unsafe_unretained, nonatomic) BleConnectionDelegate::OnConnectionErrorFunct onConnectionError; |
| @property (unsafe_unretained, nonatomic) chip::DeviceLayer::BleScannerDelegate * scannerDelegate; |
| @property (unsafe_unretained, nonatomic) chip::Ble::BleLayer * mBleLayer; |
| |
| - (id)initWithQueue:(dispatch_queue_t)queue; |
| - (id)initWithDelegate:(chip::DeviceLayer::BleScannerDelegate *)delegate queue:(dispatch_queue_t)queue; |
| - (id)initWithDiscriminator:(const chip::SetupDiscriminator &)deviceDiscriminator queue:(dispatch_queue_t)queue; |
| - (void)setBleLayer:(chip::Ble::BleLayer *)bleLayer; |
| - (void)start; |
| - (void)stop; |
| - (void)updateWithDelegate:(chip::DeviceLayer::BleScannerDelegate *)delegate; |
| - (void)updateWithDiscriminator:(const chip::SetupDiscriminator &)deviceDiscriminator; |
| - (void)updateWithPeripheral:(CBPeripheral *)peripheral; |
| - (BOOL)isScanningWithoutDelegate; |
| - (BOOL)isScanning; |
| - (BOOL)isConnecting; |
| - (void)addPeripheralToCache:(CBPeripheral *)peripheral data:(NSData *)data; |
| - (void)removePeripheralFromCache:(CBPeripheral *)peripheral; |
| - (void)removePeripheralsFromCache; |
| |
| @end |
| |
| namespace chip { |
| namespace DeviceLayer { |
| namespace Internal { |
| BleConnection * ble; |
| dispatch_queue_t bleWorkQueue; |
| |
| void BleConnectionDelegateImpl::NewConnection( |
| Ble::BleLayer * bleLayer, void * appState, const SetupDiscriminator & inDeviceDiscriminator) |
| { |
| assertChipStackLockedByCurrentThread(); |
| |
| // Make a copy of the device discriminator for the block to capture. |
| SetupDiscriminator deviceDiscriminator = inDeviceDiscriminator; |
| |
| ChipLogProgress(Ble, "ConnectionDelegate NewConnection with discriminator"); |
| if (!bleWorkQueue) { |
| bleWorkQueue = dispatch_queue_create(kBleWorkQueueName, DISPATCH_QUEUE_SERIAL_WITH_AUTORELEASE_POOL); |
| } |
| |
| dispatch_async(bleWorkQueue, ^{ |
| // If the previous connection delegate was not a try to connect to something, just reuse it instead of |
| // creating a brand new connection but update the discriminator and the ble layer members. |
| if (ble and ![ble isConnecting]) { |
| [ble setBleLayer:bleLayer]; |
| ble.appState = appState; |
| ble.onConnectionComplete = OnConnectionComplete; |
| ble.onConnectionError = OnConnectionError; |
| [ble updateWithDiscriminator:deviceDiscriminator]; |
| return; |
| } |
| |
| [ble stop]; |
| ble = [[BleConnection alloc] initWithDiscriminator:deviceDiscriminator queue:bleWorkQueue]; |
| [ble setBleLayer:bleLayer]; |
| ble.appState = appState; |
| ble.onConnectionComplete = OnConnectionComplete; |
| ble.onConnectionError = OnConnectionError; |
| ble.centralManager = [ble.centralManager initWithDelegate:ble queue:bleWorkQueue]; |
| }); |
| } |
| |
| void BleConnectionDelegateImpl::NewConnection(Ble::BleLayer * bleLayer, void * appState, BLE_CONNECTION_OBJECT connObj) |
| { |
| assertChipStackLockedByCurrentThread(); |
| |
| ChipLogProgress(Ble, "ConnectionDelegate NewConnection with conn obj: %p", connObj); |
| |
| if (!bleWorkQueue) { |
| bleWorkQueue = dispatch_queue_create(kBleWorkQueueName, DISPATCH_QUEUE_SERIAL_WITH_AUTORELEASE_POOL); |
| } |
| |
| CBPeripheral * peripheral = (__bridge CBPeripheral *) connObj; // bridge (and retain) before dispatching |
| dispatch_async(bleWorkQueue, ^{ |
| // The BLE_CONNECTION_OBJECT represent a CBPeripheral object. In order for it to be valid the central |
| // manager needs to still be running. |
| if (!ble || [ble isConnecting]) { |
| if (OnConnectionError) { |
| auto workQueue = chip::DeviceLayer::PlatformMgrImpl().GetWorkQueue(); |
| dispatch_async(workQueue, ^{ |
| OnConnectionError(appState, CHIP_ERROR_INCORRECT_STATE); |
| }); |
| } |
| return; |
| } |
| |
| [ble setBleLayer:bleLayer]; |
| ble.appState = appState; |
| ble.onConnectionComplete = OnConnectionComplete; |
| ble.onConnectionError = OnConnectionError; |
| [ble updateWithPeripheral:peripheral]; |
| }); |
| } |
| |
| void BleConnectionDelegateImpl::StartScan(BleScannerDelegate * delegate) |
| { |
| assertChipStackLockedByCurrentThread(); |
| |
| ChipLogProgress(Ble, "ConnectionDelegate StartScan%s", (delegate ? " with delegate" : "")); |
| |
| if (!bleWorkQueue) { |
| bleWorkQueue = dispatch_queue_create(kBleWorkQueueName, DISPATCH_QUEUE_SERIAL_WITH_AUTORELEASE_POOL); |
| } |
| |
| dispatch_async(bleWorkQueue, ^{ |
| // If the previous connection delegate was not a try to connect to something, just reuse it instead of |
| // creating a brand new connection but update the discriminator and the ble layer members. |
| if (ble and ![ble isConnecting]) { |
| [ble updateWithDelegate:delegate]; |
| return; |
| } |
| |
| [ble stop]; |
| ble = [[BleConnection alloc] initWithDelegate:delegate queue:bleWorkQueue]; |
| // Do _not_ set onConnectionComplete and onConnectionError |
| // here. The connection callbacks we have expect an appState |
| // that we do not have here, and in any case connection |
| // complete/error make no sense for a scan. |
| ble.centralManager = [ble.centralManager initWithDelegate:ble queue:bleWorkQueue]; |
| }); |
| } |
| |
| void BleConnectionDelegateImpl::StopScan() |
| { |
| ChipLogProgress(Ble, "ConnectionDelegate StopScan"); |
| DoCancel(); |
| } |
| |
| CHIP_ERROR BleConnectionDelegateImpl::CancelConnection() |
| { |
| ChipLogProgress(Ble, "ConnectionDelegate CancelConnection"); |
| return DoCancel(); |
| } |
| |
| CHIP_ERROR BleConnectionDelegateImpl::DoCancel() |
| { |
| assertChipStackLockedByCurrentThread(); |
| if (bleWorkQueue == nil) { |
| return CHIP_NO_ERROR; |
| } |
| |
| dispatch_async(bleWorkQueue, ^{ |
| [ble stop]; |
| ble = nil; |
| }); |
| |
| bleWorkQueue = nil; |
| return CHIP_NO_ERROR; |
| } |
| } // namespace Internal |
| } // namespace DeviceLayer |
| } // namespace chip |
| |
| @interface BleConnection () |
| @end |
| |
| @implementation BleConnection |
| |
| - (id)initWithQueue:(dispatch_queue_t)queue |
| { |
| self = [super init]; |
| if (self) { |
| self.shortServiceUUID = [UUIDHelper GetShortestServiceUUID:&chip::Ble::CHIP_BLE_SVC_ID]; |
| _chipWorkQueue = chip::DeviceLayer::PlatformMgrImpl().GetWorkQueue(); |
| _workQueue = queue; |
| _centralManager = [CBCentralManager alloc]; |
| _found = false; |
| _cachedPeripherals = [[NSMutableDictionary alloc] init]; |
| _currentMode = kUndefined; |
| } |
| |
| return self; |
| } |
| |
| - (id)initWithDelegate:(chip::DeviceLayer::BleScannerDelegate *)delegate queue:(dispatch_queue_t)queue |
| { |
| self = [self initWithQueue:queue]; |
| if (self) { |
| _scannerDelegate = delegate; |
| _currentMode = (delegate == nullptr) ? kScanningWithoutDelegate : kScanning; |
| if (_currentMode == kScanningWithoutDelegate) { |
| [self setupTimer:kScanningWithoutDelegateTimeoutInSeconds]; |
| } |
| } |
| |
| return self; |
| } |
| |
| - (id)initWithDiscriminator:(const chip::SetupDiscriminator &)deviceDiscriminator queue:(dispatch_queue_t)queue |
| { |
| self = [self initWithQueue:queue]; |
| if (self) { |
| _deviceDiscriminator = deviceDiscriminator; |
| _currentMode = kConnecting; |
| [self setupTimer:kScanningWithDiscriminatorTimeoutInSeconds]; |
| } |
| |
| return self; |
| } |
| |
| - (BOOL)isScanningWithoutDelegate |
| { |
| return _currentMode == kScanningWithoutDelegate; |
| } |
| |
| - (BOOL)isScanning |
| { |
| return _currentMode == kScanning; |
| } |
| |
| - (BOOL)isConnecting |
| { |
| return _currentMode == kConnecting; |
| } |
| |
| - (void)setupTimer:(uint64_t)timeout |
| { |
| [self clearTimer]; |
| |
| _timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, _workQueue); |
| dispatch_source_set_event_handler(_timer, ^{ |
| ChipLogProgress(Ble, "ConnectionDelegate timeout"); |
| [self stop]; |
| [self dispatchConnectionError:BLE_ERROR_APP_CLOSED_CONNECTION]; |
| }); |
| |
| auto value = static_cast<int64_t>(timeout * NSEC_PER_SEC); |
| dispatch_source_set_timer(_timer, dispatch_walltime(nullptr, value), DISPATCH_TIME_FOREVER, 5 * NSEC_PER_SEC); |
| dispatch_resume(_timer); |
| } |
| |
| - (void)clearTimer |
| { |
| if (_timer) { |
| dispatch_source_cancel(_timer); |
| _timer = nil; |
| } |
| } |
| |
| // All our callback dispatch must happen on _chipWorkQueue |
| - (void)dispatchConnectionError:(CHIP_ERROR)error |
| { |
| dispatch_async(_chipWorkQueue, ^{ |
| if (self.onConnectionError != nil) { |
| self.onConnectionError(self.appState, error); |
| } |
| }); |
| } |
| |
| - (void)dispatchConnectionComplete:(CBPeripheral *)peripheral |
| { |
| dispatch_async(_chipWorkQueue, ^{ |
| if (self.onConnectionComplete != nil) { |
| self.onConnectionComplete(self.appState, (__bridge void *) peripheral); |
| } |
| }); |
| } |
| |
| // Start CBCentralManagerDelegate |
| |
| - (void)centralManagerDidUpdateState:(CBCentralManager *)central |
| { |
| switch (central.state) { |
| case CBManagerStatePoweredOn: |
| ChipLogDetail(Ble, "CBManagerState: ON"); |
| [self start]; |
| break; |
| case CBManagerStatePoweredOff: |
| ChipLogDetail(Ble, "CBManagerState: OFF"); |
| [self stop]; |
| [self dispatchConnectionError:BLE_ERROR_APP_CLOSED_CONNECTION]; |
| break; |
| case CBManagerStateUnauthorized: |
| ChipLogDetail(Ble, "CBManagerState: Unauthorized"); |
| break; |
| case CBManagerStateResetting: |
| ChipLogDetail(Ble, "CBManagerState: RESETTING"); |
| break; |
| case CBManagerStateUnsupported: |
| ChipLogDetail(Ble, "CBManagerState: UNSUPPORTED"); |
| break; |
| case CBManagerStateUnknown: |
| ChipLogDetail(Ble, "CBManagerState: UNKNOWN"); |
| break; |
| } |
| } |
| |
| - (void)centralManager:(CBCentralManager *)central |
| didDiscoverPeripheral:(CBPeripheral *)peripheral |
| advertisementData:(NSDictionary *)advertisementData |
| RSSI:(NSNumber *)RSSI |
| { |
| NSDictionary * servicesData = [advertisementData objectForKey:CBAdvertisementDataServiceDataKey]; |
| NSData * serviceData; |
| for (CBUUID * serviceUUID in servicesData) { |
| if ([serviceUUID.data isEqualToData:_shortServiceUUID.data]) { |
| serviceData = [servicesData objectForKey:serviceUUID]; |
| break; |
| } |
| } |
| |
| if (!serviceData) { |
| return; |
| } |
| |
| NSNumber * isConnectable = [advertisementData objectForKey:CBAdvertisementDataIsConnectable]; |
| if ([isConnectable boolValue] == NO) { |
| ChipLogError(Ble, "A device (%p) with a matching Matter UUID has been discovered but it is not connectable.", peripheral); |
| return; |
| } |
| |
| const uint8_t * bytes = (const uint8_t *) [serviceData bytes]; |
| if ([serviceData length] != sizeof(ChipBLEDeviceIdentificationInfo)) { |
| NSMutableString * hexString = [NSMutableString stringWithCapacity:([serviceData length] * 2)]; |
| for (NSUInteger i = 0; i < [serviceData length]; i++) { |
| [hexString appendString:[NSString stringWithFormat:@"%02lx", (unsigned long) bytes[i]]]; |
| } |
| ChipLogError(Ble, |
| "A device (%p) with a matching Matter UUID has been discovered but the service data len does not match our expectation " |
| "(serviceData = %s)", |
| peripheral, [hexString UTF8String]); |
| return; |
| } |
| |
| uint8_t opCode = bytes[0]; |
| if (opCode != 0 && opCode != 1) { |
| ChipLogError(Ble, |
| "A device (%p) with a matching Matter UUID has been discovered but the service data opCode not match our expectation " |
| "(opCode = %u).", |
| peripheral, opCode); |
| return; |
| } |
| |
| uint16_t discriminator = (bytes[1] | (bytes[2] << 8)) & 0xfff; |
| |
| if ([self isConnecting]) { |
| if (![self checkDiscriminator:discriminator]) { |
| ChipLogError(Ble, |
| "A device (%p) with a matching Matter UUID has been discovered but the service data discriminator not match our " |
| "expectation (discriminator = %u).", |
| peripheral, discriminator); |
| return; |
| } |
| |
| ChipLogProgress(Ble, "Connecting to device %p with discriminator: %d", peripheral, discriminator); |
| [self connect:peripheral]; |
| [self stopScanning]; |
| } else { |
| [self addPeripheralToCache:peripheral data:serviceData]; |
| } |
| } |
| |
| - (BOOL)checkDiscriminator:(uint16_t)discriminator |
| { |
| return _deviceDiscriminator.MatchesLongDiscriminator(discriminator); |
| } |
| |
| - (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral |
| { |
| [peripheral setDelegate:self]; |
| [peripheral discoverServices:nil]; |
| } |
| |
| // End CBCentralManagerDelegate |
| |
| // Start CBPeripheralDelegate |
| |
| - (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error |
| { |
| if (nil != error) { |
| ChipLogError(Ble, "BLE:Error finding Chip Service in the device: [%s]", [error.localizedDescription UTF8String]); |
| } |
| |
| for (CBService * service in peripheral.services) { |
| if ([service.UUID.data isEqualToData:_shortServiceUUID.data] && !self.found) { |
| [peripheral discoverCharacteristics:nil forService:service]; |
| self.found = true; |
| break; |
| } |
| } |
| |
| if (!self.found || error != nil) { |
| ChipLogError(Ble, "Service not found on the device."); |
| [self dispatchConnectionError:CHIP_ERROR_INCORRECT_STATE]; |
| } |
| } |
| |
| - (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error |
| { |
| if (nil != error) { |
| ChipLogError( |
| Ble, "BLE:Error finding Characteristics in Chip service on the device: [%s]", [error.localizedDescription UTF8String]); |
| } |
| |
| // XXX error ? |
| [self dispatchConnectionComplete:peripheral]; |
| } |
| |
| - (void)peripheral:(CBPeripheral *)peripheral |
| didWriteValueForCharacteristic:(CBCharacteristic *)characteristic |
| error:(NSError *)error |
| { |
| if (nil == error) { |
| chip::Ble::ChipBleUUID svcId; |
| chip::Ble::ChipBleUUID charId; |
| [BleConnection fillServiceWithCharacteristicUuids:characteristic svcId:&svcId charId:&charId]; |
| dispatch_async(_chipWorkQueue, ^{ |
| _mBleLayer->HandleWriteConfirmation((__bridge void *) peripheral, &svcId, &charId); |
| }); |
| } else { |
| ChipLogError( |
| Ble, "BLE:Error writing Characteristics in Chip service on the device: [%s]", [error.localizedDescription UTF8String]); |
| dispatch_async(_chipWorkQueue, ^{ |
| _mBleLayer->HandleConnectionError((__bridge void *) peripheral, BLE_ERROR_GATT_WRITE_FAILED); |
| }); |
| } |
| } |
| |
| - (void)peripheral:(CBPeripheral *)peripheral |
| didUpdateNotificationStateForCharacteristic:(CBCharacteristic *)characteristic |
| error:(NSError *)error |
| { |
| bool isNotifying = characteristic.isNotifying; |
| |
| if (nil == error) { |
| chip::Ble::ChipBleUUID svcId; |
| chip::Ble::ChipBleUUID charId; |
| [BleConnection fillServiceWithCharacteristicUuids:characteristic svcId:&svcId charId:&charId]; |
| |
| dispatch_async(_chipWorkQueue, ^{ |
| if (isNotifying) { |
| _mBleLayer->HandleSubscribeComplete((__bridge void *) peripheral, &svcId, &charId); |
| } else { |
| _mBleLayer->HandleUnsubscribeComplete((__bridge void *) peripheral, &svcId, &charId); |
| } |
| }); |
| } else { |
| ChipLogError(Ble, "BLE:Error subscribing/unsubcribing some characteristic on the device: [%s]", |
| [error.localizedDescription UTF8String]); |
| dispatch_async(_chipWorkQueue, ^{ |
| if (isNotifying) { |
| // we're still notifying, so we must failed the unsubscription |
| _mBleLayer->HandleConnectionError((__bridge void *) peripheral, BLE_ERROR_GATT_UNSUBSCRIBE_FAILED); |
| } else { |
| // we're not notifying, so we must failed the subscription |
| _mBleLayer->HandleConnectionError((__bridge void *) peripheral, BLE_ERROR_GATT_SUBSCRIBE_FAILED); |
| } |
| }); |
| } |
| } |
| |
| - (void)peripheral:(CBPeripheral *)peripheral |
| didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic |
| error:(NSError *)error |
| { |
| if (nil == error) { |
| chip::Ble::ChipBleUUID svcId; |
| chip::Ble::ChipBleUUID charId; |
| [BleConnection fillServiceWithCharacteristicUuids:characteristic svcId:&svcId charId:&charId]; |
| auto * value = characteristic.value; // read immediately before dispatching |
| |
| dispatch_async(_chipWorkQueue, ^{ |
| // build a inet buffer from the rxEv and send to blelayer. |
| auto msgBuf = chip::System::PacketBufferHandle::NewWithData(value.bytes, value.length); |
| |
| if (msgBuf.IsNull()) { |
| ChipLogError(Ble, "Failed at allocating buffer for incoming BLE data"); |
| _mBleLayer->HandleConnectionError((__bridge void *) peripheral, CHIP_ERROR_NO_MEMORY); |
| } else if (!_mBleLayer->HandleIndicationReceived((__bridge void *) peripheral, &svcId, &charId, std::move(msgBuf))) { |
| // since this error comes from device manager core |
| // we assume it would do the right thing, like closing the connection |
| ChipLogError(Ble, "Failed at handling incoming BLE data"); |
| } |
| }); |
| } else { |
| ChipLogError( |
| Ble, "BLE:Error receiving indication of Characteristics on the device: [%s]", [error.localizedDescription UTF8String]); |
| dispatch_async(_chipWorkQueue, ^{ |
| _mBleLayer->HandleConnectionError((__bridge void *) peripheral, BLE_ERROR_GATT_INDICATE_FAILED); |
| }); |
| } |
| } |
| |
| // End CBPeripheralDelegate |
| |
| - (void)start |
| { |
| // If a peripheral has already been found, try to connect to it once BLE starts, |
| // otherwise start scanning to find the peripheral to connect to. |
| if (_peripheral != nil) { |
| [self connect:_peripheral]; |
| } else { |
| [self startScanning]; |
| } |
| } |
| |
| - (void)stop |
| { |
| _scannerDelegate = nil; |
| _found = false; |
| [self stopScanning]; |
| [self removePeripheralsFromCache]; |
| |
| if (!_centralManager && !_peripheral) { |
| return; |
| } |
| |
| // Properly closing the underlying ble connections needs to happens |
| // on the chip work queue. At the same time the SDK is trying to |
| // properly unsubscribe and shutdown the connection, so if we nullify |
| // the centralManager and the peripheral members too early it won't be |
| // able to reach those. |
| // This is why closing connections happens as 2 async steps. |
| dispatch_async(_chipWorkQueue, ^{ |
| if (_peripheral) { |
| _mBleLayer->CloseAllBleConnections(); |
| } |
| |
| dispatch_async(_workQueue, ^{ |
| _centralManager.delegate = nil; |
| _centralManager = nil; |
| _peripheral = nil; |
| if (chip::DeviceLayer::Internal::ble == self) { |
| chip::DeviceLayer::Internal::ble = nil; |
| } |
| }); |
| }); |
| } |
| |
| - (void)startScanning |
| { |
| if (!_centralManager) { |
| return; |
| } |
| |
| auto scanOptions = @{ CBCentralManagerScanOptionAllowDuplicatesKey : @YES }; |
| [_centralManager scanForPeripheralsWithServices:@[ _shortServiceUUID ] options:scanOptions]; |
| } |
| |
| - (void)stopScanning |
| { |
| if (!_centralManager) { |
| return; |
| } |
| |
| [self clearTimer]; |
| [_centralManager stopScan]; |
| } |
| |
| - (void)connect:(CBPeripheral *)peripheral |
| { |
| if (!_centralManager || !peripheral) { |
| return; |
| } |
| |
| _peripheral = peripheral; |
| [_centralManager connectPeripheral:peripheral options:nil]; |
| } |
| |
| - (void)updateWithDelegate:(chip::DeviceLayer::BleScannerDelegate *)delegate |
| { |
| _scannerDelegate = delegate; |
| _currentMode = (delegate == nullptr) ? kScanningWithoutDelegate : kScanning; |
| |
| if (_currentMode == kScanning) { |
| [self clearTimer]; |
| |
| for (CBPeripheral * cachedPeripheral in _cachedPeripherals) { |
| NSData * serviceData = _cachedPeripherals[cachedPeripheral][@"data"]; |
| dispatch_async(_chipWorkQueue, ^{ |
| ChipBLEDeviceIdentificationInfo info; |
| memcpy(&info, [serviceData bytes], sizeof(info)); |
| _scannerDelegate->OnBleScanAdd((__bridge void *) cachedPeripheral, info); |
| }); |
| } |
| } else { |
| [self setupTimer:kScanningWithoutDelegateTimeoutInSeconds]; |
| } |
| } |
| |
| - (void)updateWithDiscriminator:(const chip::SetupDiscriminator &)deviceDiscriminator |
| { |
| _deviceDiscriminator = deviceDiscriminator; |
| _scannerDelegate = nil; |
| _currentMode = kConnecting; |
| |
| CBPeripheral * peripheral = nil; |
| for (CBPeripheral * cachedPeripheral in _cachedPeripherals) { |
| NSData * serviceData = _cachedPeripherals[cachedPeripheral][@"data"]; |
| ChipBLEDeviceIdentificationInfo info; |
| memcpy(&info, [serviceData bytes], sizeof(info)); |
| |
| if ([self checkDiscriminator:info.GetDeviceDiscriminator()]) { |
| peripheral = cachedPeripheral; |
| break; |
| } |
| } |
| |
| [self removePeripheralsFromCache]; |
| |
| if (peripheral) { |
| ChipLogProgress(Ble, "Connecting to cached device: %p", peripheral); |
| [self connect:peripheral]; |
| [self stopScanning]; |
| } else { |
| [self setupTimer:kScanningWithDiscriminatorTimeoutInSeconds]; |
| } |
| } |
| |
| - (void)updateWithPeripheral:(CBPeripheral *)peripheral |
| { |
| _scannerDelegate = nil; |
| _currentMode = kConnecting; |
| |
| ChipLogProgress(Ble, "Connecting to device: %p", peripheral); |
| [self connect:peripheral]; |
| [self stopScanning]; |
| } |
| |
| - (void)addPeripheralToCache:(CBPeripheral *)peripheral data:(NSData *)data |
| { |
| dispatch_source_t timeoutTimer; |
| |
| bool shouldLogData = true; |
| if ([_cachedPeripherals objectForKey:peripheral]) { |
| shouldLogData = ![data isEqualToData:_cachedPeripherals[peripheral][@"data"]]; |
| if (shouldLogData) { |
| ChipLogProgress(Ble, "Updating peripheral %p from the cache", peripheral); |
| } |
| |
| timeoutTimer = _cachedPeripherals[peripheral][@"timer"]; |
| } else { |
| ChipLogProgress(Ble, "Adding peripheral %p to the cache", peripheral); |
| auto delegate = _scannerDelegate; |
| if (delegate) { |
| dispatch_async(_chipWorkQueue, ^{ |
| ChipBLEDeviceIdentificationInfo info; |
| auto bytes = (const uint8_t *) [data bytes]; |
| memcpy(&info, bytes, sizeof(info)); |
| delegate->OnBleScanAdd((__bridge void *) peripheral, info); |
| }); |
| } |
| |
| timeoutTimer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, _workQueue); |
| dispatch_source_set_event_handler(timeoutTimer, ^{ |
| [self removePeripheralFromCache:peripheral]; |
| }); |
| dispatch_resume(timeoutTimer); |
| } |
| |
| auto timeout = static_cast<int64_t>(kCachePeripheralTimeoutInSeconds * NSEC_PER_SEC); |
| dispatch_source_set_timer(timeoutTimer, dispatch_walltime(nullptr, timeout), DISPATCH_TIME_FOREVER, 5 * NSEC_PER_SEC); |
| |
| _cachedPeripherals[peripheral] = @{ |
| @"data" : data, |
| @"timer" : timeoutTimer, |
| }; |
| |
| if (shouldLogData) { |
| ChipBLEDeviceIdentificationInfo info; |
| auto bytes = (const uint8_t *) [data bytes]; |
| memcpy(&info, bytes, sizeof(info)); |
| |
| ChipLogProgress(Ble, " - Version: %u", info.GetAdvertisementVersion()); |
| ChipLogProgress(Ble, " - Discriminator: %u", info.GetDeviceDiscriminator()); |
| ChipLogProgress(Ble, " - VendorId: %u", info.GetVendorId()); |
| ChipLogProgress(Ble, " - ProductId: %u", info.GetProductId()); |
| } |
| } |
| |
| - (void)removePeripheralFromCache:(CBPeripheral *)peripheral |
| { |
| auto entry = [_cachedPeripherals objectForKey:peripheral]; |
| if (entry) { |
| ChipLogProgress(Ble, "Removing peripheral %p from the cache", peripheral); |
| |
| dispatch_source_cancel(entry[@"timer"]); |
| [_cachedPeripherals removeObjectForKey:peripheral]; |
| |
| auto delegate = _scannerDelegate; |
| if (delegate) { |
| dispatch_async(_chipWorkQueue, ^{ |
| delegate->OnBleScanRemove((__bridge void *) peripheral); |
| }); |
| } |
| } |
| } |
| |
| - (void)removePeripheralsFromCache |
| { |
| for (CBPeripheral * peripheral in [_cachedPeripherals allKeys]) { |
| [self removePeripheralFromCache:peripheral]; |
| } |
| } |
| |
| /** |
| * private static method to copy service and characteristic UUIDs from CBCharacteristic to a pair of ChipBleUUID objects. |
| * this is used in calls into Chip layer to decouple it from CoreBluetooth |
| * |
| * @param[in] characteristic the source characteristic |
| * @param[in] svcId the destination service UUID |
| * @param[in] charId the destination characteristic UUID |
| * |
| */ |
| + (void)fillServiceWithCharacteristicUuids:(CBCharacteristic *)characteristic |
| svcId:(chip::Ble::ChipBleUUID *)svcId |
| charId:(chip::Ble::ChipBleUUID *)charId |
| { |
| static const size_t FullUUIDLength = 16; |
| if ((FullUUIDLength != sizeof(charId->bytes)) || (FullUUIDLength != sizeof(svcId->bytes)) |
| || (FullUUIDLength != characteristic.UUID.data.length)) { |
| // we're dead. we expect the data length to be the same (16-byte) across the board |
| ChipLogError(Ble, "UUID of characteristic is incompatible"); |
| return; |
| } |
| |
| memcpy(charId->bytes, characteristic.UUID.data.bytes, sizeof(charId->bytes)); |
| memset(svcId->bytes, 0, sizeof(svcId->bytes)); |
| |
| // Expand service UUID back to 16-byte long as that's what the BLE Layer expects |
| // this is a buffer pre-filled with BLE service UUID Base |
| // byte 0 to 3 are reserved for shorter versions of BLE service UUIDs |
| // For 4-byte service UUIDs, all bytes from 0 to 3 are used |
| // For 2-byte service UUIDs, byte 0 and 1 shall be 0 |
| uint8_t serviceFullUUID[FullUUIDLength] |
| = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0x80, 0x5F, 0x9B, 0x34, 0xFB }; |
| |
| switch (characteristic.service.UUID.data.length) { |
| case 2: |
| // copy the 2-byte service UUID onto the right offset |
| memcpy(serviceFullUUID + 2, characteristic.service.UUID.data.bytes, 2); |
| break; |
| case 4: |
| // flow through |
| case 16: |
| memcpy(serviceFullUUID, characteristic.service.UUID.data.bytes, characteristic.service.UUID.data.length); |
| break; |
| default: |
| // we're dead. we expect the data length to be the same (16-byte) across the board |
| ChipLogError(Ble, "Service UUIDs are incompatible"); |
| } |
| memcpy(svcId->bytes, serviceFullUUID, sizeof(svcId->bytes)); |
| } |
| |
| - (void)setBleLayer:(chip::Ble::BleLayer *)bleLayer |
| { |
| _mBleLayer = bleLayer; |
| } |
| |
| @end |
