git.basschouten.com Git - openhab-addons.git/blob

   1 /**
   2  * Copyright (c) 2010-2021 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.bluetooth.bluez.internal;
  14
  15 import java.util.Map;
  16 import java.util.Objects;
  17 import java.util.UUID;
  18 import java.util.concurrent.CompletableFuture;
  19 import java.util.concurrent.ScheduledExecutorService;
  20 import java.util.concurrent.TimeUnit;
  21
  22 import org.eclipse.jdt.annotation.NonNullByDefault;
  23 import org.eclipse.jdt.annotation.Nullable;
  24 import org.freedesktop.dbus.errors.NoReply;
  25 import org.freedesktop.dbus.exceptions.DBusException;
  26 import org.freedesktop.dbus.exceptions.DBusExecutionException;
  27 import org.freedesktop.dbus.types.UInt16;
  28 import org.openhab.binding.bluetooth.BaseBluetoothDevice;
  29 import org.openhab.binding.bluetooth.BluetoothAddress;
  30 import org.openhab.binding.bluetooth.BluetoothCharacteristic;
  31 import org.openhab.binding.bluetooth.BluetoothDescriptor;
  32 import org.openhab.binding.bluetooth.BluetoothService;
  33 import org.openhab.binding.bluetooth.bluez.internal.events.BlueZEvent;
  34 import org.openhab.binding.bluetooth.bluez.internal.events.BlueZEventListener;
  35 import org.openhab.binding.bluetooth.bluez.internal.events.CharacteristicUpdateEvent;
  36 import org.openhab.binding.bluetooth.bluez.internal.events.ConnectedEvent;
  37 import org.openhab.binding.bluetooth.bluez.internal.events.ManufacturerDataEvent;
  38 import org.openhab.binding.bluetooth.bluez.internal.events.NameEvent;
  39 import org.openhab.binding.bluetooth.bluez.internal.events.RssiEvent;
  40 import org.openhab.binding.bluetooth.bluez.internal.events.ServicesResolvedEvent;
  41 import org.openhab.binding.bluetooth.bluez.internal.events.TXPowerEvent;
  42 import org.openhab.binding.bluetooth.notification.BluetoothConnectionStatusNotification;
  43 import org.openhab.binding.bluetooth.notification.BluetoothScanNotification;
  44 import org.openhab.binding.bluetooth.util.RetryException;
  45 import org.openhab.binding.bluetooth.util.RetryFuture;
  46 import org.openhab.core.common.ThreadPoolManager;
  47 import org.openhab.core.util.HexUtils;
  48 import org.slf4j.Logger;
  49 import org.slf4j.LoggerFactory;
  50
  51 import com.github.hypfvieh.bluetooth.wrapper.BluetoothDevice;
  52 import com.github.hypfvieh.bluetooth.wrapper.BluetoothGattCharacteristic;
  53 import com.github.hypfvieh.bluetooth.wrapper.BluetoothGattDescriptor;
  54 import com.github.hypfvieh.bluetooth.wrapper.BluetoothGattService;
  55
  56 /**
  57  * Implementation of BluetoothDevice for BlueZ via DBus-BlueZ API
  58  *
  59  * @author Kai Kreuzer - Initial contribution and API
  60  * @author Benjamin Lafois - Replaced tinyB with bluezDbus
  61  * @author Peter Rosenberg - Improve notifications and properties support
  62  *
  63  */
  64 @NonNullByDefault
  65 public class BlueZBluetoothDevice extends BaseBluetoothDevice implements BlueZEventListener {
  66
  67     private final Logger logger = LoggerFactory.getLogger(BlueZBluetoothDevice.class);
  68
  69     private final ScheduledExecutorService scheduler = ThreadPoolManager.getScheduledPool("bluetooth");
  70
  71     // Device from native lib
  72     private @Nullable BluetoothDevice device = null;
  73
  74     /**
  75      * Constructor
  76      *
  77      * @param adapter the bridge handler through which this device is connected
  78      * @param address the Bluetooth address of the device
  79      * @param name the name of the device
  80      */
  81     public BlueZBluetoothDevice(BlueZBridgeHandler adapter, BluetoothAddress address) {
  82         super(adapter, address);
  83         logger.debug("Creating DBusBlueZ device with address '{}'", address);
  84     }
  85
  86     @SuppressWarnings("PMD.CompareObjectsWithEquals")
  87     public synchronized void updateBlueZDevice(@Nullable BluetoothDevice blueZDevice) {
  88         if (this.device != null && this.device == blueZDevice) {
  89             return;
  90         }
  91         logger.debug("updateBlueZDevice({})", blueZDevice);
  92
  93         this.device = blueZDevice;
  94
  95         if (blueZDevice == null) {
  96             return;
  97         }
  98
  99         Short rssi = blueZDevice.getRssi();
 100         if (rssi != null) {
 101             this.rssi = rssi.intValue();
 102         }
 103         this.name = blueZDevice.getName();
 104         Map<UInt16, byte[]> manData = blueZDevice.getManufacturerData();
 105         if (manData != null) {
 106             manData.entrySet().stream().map(Map.Entry::getKey).filter(Objects::nonNull).findFirst()
 107                     .ifPresent((UInt16 manufacturerId) ->
 108                     // Convert to unsigned int to match the convention in BluetoothCompanyIdentifiers
 109                     this.manufacturer = manufacturerId.intValue() & 0xFFFF);
 110         }
 111
 112         if (Boolean.TRUE.equals(blueZDevice.isConnected())) {
 113             setConnectionState(ConnectionState.CONNECTED);
 114         }
 115
 116         discoverServices();
 117     }
 118
 119     /**
 120      * Clean up and release memory.
 121      */
 122     @Override
 123     public void dispose() {
 124         BluetoothDevice dev = device;
 125         if (dev != null) {
 126             if (Boolean.TRUE.equals(dev.isPaired())) {
 127                 return;
 128             }
 129
 130             try {
 131                 dev.getAdapter().removeDevice(dev.getRawDevice());
 132             } catch (DBusException ex) {
 133                 if (ex.getMessage().contains("Does Not Exist")) {
 134                     // this happens when the underlying device has already been removed
 135                     // but we don't have a way to check if that is the case beforehand so
 136                     // we will just eat the error here.
 137                 } else {
 138                     logger.debug("Exception occurred when trying to remove inactive device '{}': {}", address,
 139                             ex.getMessage());
 140                 }
 141             } catch (RuntimeException ex) {
 142                 // try to catch any other exceptions
 143                 logger.debug("Exception occurred when trying to remove inactive device '{}': {}", address,
 144                         ex.getMessage());
 145             }
 146         }
 147     }
 148
 149     private void setConnectionState(ConnectionState state) {
 150         if (this.connectionState != state) {
 151             this.connectionState = state;
 152             notifyListeners(BluetoothEventType.CONNECTION_STATE, new BluetoothConnectionStatusNotification(state));
 153         }
 154     }
 155
 156     @Override
 157     public boolean connect() {
 158         logger.debug("Connect({})", device);
 159
 160         BluetoothDevice dev = device;
 161         if (dev != null) {
 162             if (Boolean.FALSE.equals(dev.isConnected())) {
 163                 try {
 164                     boolean ret = dev.connect();
 165                     logger.debug("Connect result: {}", ret);
 166                     return ret;
 167                 } catch (NoReply e) {
 168                     // Have to double check because sometimes, exception but still worked
 169                     logger.debug("Got a timeout - but sometimes happen. Is Connected ? {}", dev.isConnected());
 170                     if (Boolean.FALSE.equals(dev.isConnected())) {
 171
 172                         notifyListeners(BluetoothEventType.CONNECTION_STATE,
 173                                 new BluetoothConnectionStatusNotification(ConnectionState.DISCONNECTED));
 174                         return false;
 175                     } else {
 176                         return true;
 177                     }
 178                 } catch (DBusExecutionException e) {
 179                     // Catch "software caused connection abort"
 180                     return false;
 181                 } catch (Exception e) {
 182                     logger.warn("error occured while trying to connect", e);
 183                 }
 184
 185             } else {
 186                 logger.debug("Device was already connected");
 187                 // we might be stuck in another state atm so we need to trigger a connected in this case
 188                 setConnectionState(ConnectionState.CONNECTED);
 189                 return true;
 190             }
 191         }
 192         return false;
 193     }
 194
 195     @Override
 196     public boolean disconnect() {
 197         BluetoothDevice dev = device;
 198         if (dev != null) {
 199             logger.debug("Disconnecting '{}'", address);
 200             return dev.disconnect();
 201         }
 202         return false;
 203     }
 204
 205     private void ensureConnected() {
 206         BluetoothDevice dev = device;
 207         if (dev == null || !dev.isConnected()) {
 208             throw new IllegalStateException("DBusBlueZ device is not set or not connected");
 209         }
 210     }
 211
 212     private @Nullable BluetoothGattCharacteristic getDBusBlueZCharacteristicByUUID(String uuid) {
 213         BluetoothDevice dev = device;
 214         if (dev == null) {
 215             return null;
 216         }
 217         for (BluetoothGattService service : dev.getGattServices()) {
 218             for (BluetoothGattCharacteristic c : service.getGattCharacteristics()) {
 219                 if (c.getUuid().equalsIgnoreCase(uuid)) {
 220                     return c;
 221                 }
 222             }
 223         }
 224         return null;
 225     }
 226
 227     private @Nullable BluetoothGattCharacteristic getDBusBlueZCharacteristicByDBusPath(String dBusPath) {
 228         BluetoothDevice dev = device;
 229         if (dev == null) {
 230             return null;
 231         }
 232         for (BluetoothGattService service : dev.getGattServices()) {
 233             if (dBusPath.startsWith(service.getDbusPath())) {
 234                 for (BluetoothGattCharacteristic characteristic : service.getGattCharacteristics()) {
 235                     if (dBusPath.startsWith(characteristic.getDbusPath())) {
 236                         return characteristic;
 237                     }
 238                 }
 239             }
 240         }
 241         return null;
 242     }
 243
 244     private @Nullable BluetoothGattDescriptor getDBusBlueZDescriptorByUUID(String uuid) {
 245         BluetoothDevice dev = device;
 246         if (dev == null) {
 247             return null;
 248         }
 249         for (BluetoothGattService service : dev.getGattServices()) {
 250             for (BluetoothGattCharacteristic c : service.getGattCharacteristics()) {
 251                 for (BluetoothGattDescriptor d : c.getGattDescriptors()) {
 252                     if (d.getUuid().equalsIgnoreCase(uuid)) {
 253                         return d;
 254                     }
 255                 }
 256             }
 257         }
 258         return null;
 259     }
 260
 261     @Override
 262     public CompletableFuture<@Nullable Void> enableNotifications(BluetoothCharacteristic characteristic) {
 263         BluetoothDevice dev = device;
 264         if (dev == null || !dev.isConnected()) {
 265             return CompletableFuture
 266                     .failedFuture(new IllegalStateException("DBusBlueZ device is not set or not connected"));
 267         }
 268
 269         BluetoothGattCharacteristic c = getDBusBlueZCharacteristicByUUID(characteristic.getUuid().toString());
 270         if (c == null) {
 271             logger.warn("Characteristic '{}' is missing on device '{}'.", characteristic.getUuid(), address);
 272             return CompletableFuture.failedFuture(
 273                     new IllegalStateException("Characteristic " + characteristic.getUuid() + " is missing on device"));
 274         }
 275
 276         return RetryFuture.callWithRetry(() -> {
 277             try {
 278                 c.startNotify();
 279             } catch (DBusException e) {
 280                 if (e.getMessage().contains("Already notifying")) {
 281                     return null;
 282                 } else if (e.getMessage().contains("In Progress")) {
 283                     // let's retry in half a second
 284                     throw new RetryException(500, TimeUnit.MILLISECONDS);
 285                 } else {
 286                     logger.warn("Exception occurred while activating notifications on '{}'", address, e);
 287                     throw e;
 288                 }
 289             }
 290             return null;
 291         }, scheduler);
 292     }
 293
 294     @Override
 295     public CompletableFuture<@Nullable Void> writeCharacteristic(BluetoothCharacteristic characteristic, byte[] value) {
 296         logger.debug("writeCharacteristic()");
 297
 298         BluetoothDevice dev = device;
 299         if (dev == null || !dev.isConnected()) {
 300             return CompletableFuture
 301                     .failedFuture(new IllegalStateException("DBusBlueZ device is not set or not connected"));
 302         }
 303
 304         BluetoothGattCharacteristic c = getDBusBlueZCharacteristicByUUID(characteristic.getUuid().toString());
 305         if (c == null) {
 306             logger.warn("Characteristic '{}' is missing on device '{}'.", characteristic.getUuid(), address);
 307             return CompletableFuture.failedFuture(
 308                     new IllegalStateException("Characteristic " + characteristic.getUuid() + " is missing on device"));
 309         }
 310
 311         return RetryFuture.callWithRetry(() -> {
 312             try {
 313                 c.writeValue(value, null);
 314                 return null;
 315             } catch (DBusException e) {
 316                 logger.debug("Exception occurred when trying to write characteristic '{}': {}",
 317                         characteristic.getUuid(), e.getMessage());
 318                 throw e;
 319             }
 320         }, scheduler);
 321     }
 322
 323     @Override
 324     public void onDBusBlueZEvent(BlueZEvent event) {
 325         logger.debug("Unsupported event: {}", event);
 326     }
 327
 328     @Override
 329     public void onServicesResolved(ServicesResolvedEvent event) {
 330         if (event.isResolved()) {
 331             notifyListeners(BluetoothEventType.SERVICES_DISCOVERED);
 332         }
 333     }
 334
 335     @Override
 336     public void onNameUpdate(NameEvent event) {
 337         BluetoothScanNotification notification = new BluetoothScanNotification();
 338         notification.setDeviceName(event.getName());
 339         notifyListeners(BluetoothEventType.SCAN_RECORD, notification);
 340     }
 341
 342     @Override
 343     public void onManufacturerDataUpdate(ManufacturerDataEvent event) {
 344         for (Map.Entry<Short, byte[]> entry : event.getData().entrySet()) {
 345             BluetoothScanNotification notification = new BluetoothScanNotification();
 346             byte[] data = new byte[entry.getValue().length + 2];
 347             data[0] = (byte) (entry.getKey() & 0xFF);
 348             data[1] = (byte) (entry.getKey() >>> 8);
 349
 350             System.arraycopy(entry.getValue(), 0, data, 2, entry.getValue().length);
 351
 352             if (logger.isDebugEnabled()) {
 353                 logger.debug("Received manufacturer data for '{}': {}", address, HexUtils.bytesToHex(data, " "));
 354             }
 355
 356             notification.setManufacturerData(data);
 357             notifyListeners(BluetoothEventType.SCAN_RECORD, notification);
 358         }
 359     }
 360
 361     @Override
 362     public void onTxPowerUpdate(TXPowerEvent event) {
 363         this.txPower = (int) event.getTxPower();
 364     }
 365
 366     @Override
 367     public void onCharacteristicNotify(CharacteristicUpdateEvent event) {
 368         // Here it is a bit special - as the event is linked to the DBUS path, not characteristic UUID.
 369         // So we need to find the characteristic by its DBUS path.
 370         BluetoothGattCharacteristic characteristic = getDBusBlueZCharacteristicByDBusPath(event.getDbusPath());
 371         if (characteristic == null) {
 372             logger.debug("Received a notification for a characteristic not found on device.");
 373             return;
 374         }
 375         BluetoothCharacteristic c = getCharacteristic(UUID.fromString(characteristic.getUuid()));
 376         if (c != null) {
 377             notifyListeners(BluetoothEventType.CHARACTERISTIC_UPDATED, c, event.getData());
 378         }
 379     }
 380
 381     @Override
 382     public void onRssiUpdate(RssiEvent event) {
 383         int rssiTmp = event.getRssi();
 384         this.rssi = rssiTmp;
 385         BluetoothScanNotification notification = new BluetoothScanNotification();
 386         notification.setRssi(rssiTmp);
 387         notifyListeners(BluetoothEventType.SCAN_RECORD, notification);
 388     }
 389
 390     @Override
 391     public void onConnectedStatusUpdate(ConnectedEvent event) {
 392         this.connectionState = event.isConnected() ? ConnectionState.CONNECTED : ConnectionState.DISCONNECTED;
 393         notifyListeners(BluetoothEventType.CONNECTION_STATE,
 394                 new BluetoothConnectionStatusNotification(connectionState));
 395     }
 396
 397     @Override
 398     public boolean discoverServices() {
 399         BluetoothDevice dev = device;
 400         if (dev == null) {
 401             return false;
 402         }
 403         if (dev.getGattServices().size() > getServices().size()) {
 404             for (BluetoothGattService dBusBlueZService : dev.getGattServices()) {
 405                 BluetoothService service = new BluetoothService(UUID.fromString(dBusBlueZService.getUuid()),
 406                         dBusBlueZService.isPrimary());
 407                 for (BluetoothGattCharacteristic dBusBlueZCharacteristic : dBusBlueZService.getGattCharacteristics()) {
 408                     BluetoothCharacteristic characteristic = new BluetoothCharacteristic(
 409                             UUID.fromString(dBusBlueZCharacteristic.getUuid()), 0);
 410                     convertCharacteristicProperties(dBusBlueZCharacteristic, characteristic);
 411
 412                     for (BluetoothGattDescriptor dBusBlueZDescriptor : dBusBlueZCharacteristic.getGattDescriptors()) {
 413                         BluetoothDescriptor descriptor = new BluetoothDescriptor(characteristic,
 414                                 UUID.fromString(dBusBlueZDescriptor.getUuid()), 0);
 415                         characteristic.addDescriptor(descriptor);
 416                     }
 417                     service.addCharacteristic(characteristic);
 418                 }
 419                 addService(service);
 420             }
 421             notifyListeners(BluetoothEventType.SERVICES_DISCOVERED);
 422         }
 423         return true;
 424     }
 425
 426     /**
 427      * Convert the flags of BluetoothGattCharacteristic to the int bitset used by BluetoothCharacteristic.
 428      *
 429      * @param dBusBlueZCharacteristic source characteristic to read the flags from
 430      * @param characteristic destination characteristic to write to properties to
 431      */
 432     private void convertCharacteristicProperties(BluetoothGattCharacteristic dBusBlueZCharacteristic,
 433             BluetoothCharacteristic characteristic) {
 434         int properties = 0;
 435
 436         for (String property : dBusBlueZCharacteristic.getFlags()) {
 437             switch (property) {
 438                 case "broadcast":
 439                     properties |= BluetoothCharacteristic.PROPERTY_BROADCAST;
 440                     break;
 441                 case "read":
 442                     properties |= BluetoothCharacteristic.PROPERTY_READ;
 443                     break;
 444                 case "write-without-response":
 445                     properties |= BluetoothCharacteristic.PROPERTY_WRITE_NO_RESPONSE;
 446                     break;
 447                 case "write":
 448                     properties |= BluetoothCharacteristic.PROPERTY_WRITE;
 449                     break;
 450                 case "notify":
 451                     properties |= BluetoothCharacteristic.PROPERTY_NOTIFY;
 452                     break;
 453                 case "indicate":
 454                     properties |= BluetoothCharacteristic.PROPERTY_INDICATE;
 455                     break;
 456             }
 457         }
 458
 459         characteristic.setProperties(properties);
 460     }
 461
 462     @Override
 463     public CompletableFuture<byte[]> readCharacteristic(BluetoothCharacteristic characteristic) {
 464         BluetoothDevice dev = device;
 465         if (dev == null || !dev.isConnected()) {
 466             return CompletableFuture
 467                     .failedFuture(new IllegalStateException("DBusBlueZ device is not set or not connected"));
 468         }
 469
 470         BluetoothGattCharacteristic c = getDBusBlueZCharacteristicByUUID(characteristic.getUuid().toString());
 471         if (c == null) {
 472             logger.warn("Characteristic '{}' is missing on device '{}'.", characteristic.getUuid(), address);
 473             return CompletableFuture.failedFuture(
 474                     new IllegalStateException("Characteristic " + characteristic.getUuid() + " is missing on device"));
 475         }
 476
 477         return RetryFuture.callWithRetry(() -> {
 478             try {
 479                 return c.readValue(null);
 480             } catch (DBusException | DBusExecutionException e) {
 481                 // DBusExecutionException is thrown if the value cannot be read
 482                 logger.debug("Exception occurred when trying to read characteristic '{}': {}", characteristic.getUuid(),
 483                         e.getMessage());
 484                 throw e;
 485             }
 486         }, scheduler);
 487     }
 488
 489     @Override
 490     public boolean isNotifying(BluetoothCharacteristic characteristic) {
 491         BluetoothGattCharacteristic c = getDBusBlueZCharacteristicByUUID(characteristic.getUuid().toString());
 492         if (c != null) {
 493             Boolean isNotifying = c.isNotifying();
 494             return Objects.requireNonNullElse(isNotifying, false);
 495         } else {
 496             logger.warn("Characteristic '{}' is missing on device '{}'.", characteristic.getUuid(), address);
 497             return false;
 498         }
 499     }
 500
 501     @Override
 502     public CompletableFuture<@Nullable Void> disableNotifications(BluetoothCharacteristic characteristic) {
 503         BluetoothDevice dev = device;
 504         if (dev == null || !dev.isConnected()) {
 505             return CompletableFuture
 506                     .failedFuture(new IllegalStateException("DBusBlueZ device is not set or not connected"));
 507         }
 508         BluetoothGattCharacteristic c = getDBusBlueZCharacteristicByUUID(characteristic.getUuid().toString());
 509         if (c == null) {
 510             logger.warn("Characteristic '{}' is missing on device '{}'.", characteristic.getUuid(), address);
 511             return CompletableFuture.failedFuture(
 512                     new IllegalStateException("Characteristic " + characteristic.getUuid() + " is missing on device"));
 513         }
 514
 515         return RetryFuture.callWithRetry(() -> {
 516             try {
 517                 c.stopNotify();
 518             } catch (DBusException e) {
 519                 if (e.getMessage().contains("Already notifying")) {
 520                     return null;
 521                 } else if (e.getMessage().contains("In Progress")) {
 522                     // let's retry in half a second
 523                     throw new RetryException(500, TimeUnit.MILLISECONDS);
 524                 } else {
 525                     logger.warn("Exception occurred while deactivating notifications on '{}'", address, e);
 526                     throw e;
 527                 }
 528             }
 529             return null;
 530         }, scheduler);
 531     }
 532
 533     @Override
 534     public boolean enableNotifications(BluetoothDescriptor descriptor) {
 535         // Not sure if it is possible to implement this
 536         return false;
 537     }
 538
 539     @Override
 540     public boolean disableNotifications(BluetoothDescriptor descriptor) {
 541         // Not sure if it is possible to implement this
 542         return false;
 543     }
 544 }