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   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.miio.internal.discovery;
  14
  15 import static org.openhab.binding.miio.internal.MiIoBindingConstants.*;
  16
  17 import java.io.IOException;
  18 import java.net.DatagramPacket;
  19 import java.net.DatagramSocket;
  20 import java.net.InetAddress;
  21 import java.net.SocketException;
  22 import java.util.Arrays;
  23 import java.util.Dictionary;
  24 import java.util.HashSet;
  25 import java.util.List;
  26 import java.util.Map;
  27 import java.util.Set;
  28 import java.util.concurrent.ConcurrentHashMap;
  29 import java.util.concurrent.ScheduledFuture;
  30 import java.util.concurrent.TimeUnit;
  31
  32 import org.eclipse.jdt.annotation.NonNullByDefault;
  33 import org.eclipse.jdt.annotation.Nullable;
  34 import org.openhab.binding.miio.internal.Message;
  35 import org.openhab.binding.miio.internal.MiIoDevices;
  36 import org.openhab.binding.miio.internal.Utils;
  37 import org.openhab.binding.miio.internal.cloud.CloudConnector;
  38 import org.openhab.binding.miio.internal.cloud.CloudDeviceDTO;
  39 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  40 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  41 import org.openhab.core.config.discovery.DiscoveryService;
  42 import org.openhab.core.net.NetUtil;
  43 import org.openhab.core.thing.ThingTypeUID;
  44 import org.openhab.core.thing.ThingUID;
  45 import org.osgi.service.cm.Configuration;
  46 import org.osgi.service.cm.ConfigurationAdmin;
  47 import org.osgi.service.component.annotations.Activate;
  48 import org.osgi.service.component.annotations.Component;
  49 import org.osgi.service.component.annotations.Reference;
  50 import org.slf4j.Logger;
  51 import org.slf4j.LoggerFactory;
  52
  53 /**
  54  * The {@link MiIoDiscovery} is responsible for discovering new Xiaomi Mi IO devices
  55  * and their token
  56  *
  57  * @author Marcel Verpaalen - Initial contribution
  58  *
  59  */
  60 @NonNullByDefault
  61 @Component(service = DiscoveryService.class, configurationPid = "discovery.miio")
  62 public class MiIoDiscovery extends AbstractDiscoveryService {
  63
  64     /** The refresh interval for background discovery */
  65     private static final long SEARCH_INTERVAL = 600;
  66     private static final int BUFFER_LENGTH = 1024;
  67     private static final int DISCOVERY_TIME = 10;
  68     private static final String DISABLED = "disabled";
  69     private static final String SUPPORTED = "supportedonly";
  70     private static final String ALL = "all";
  71
  72     private @Nullable ScheduledFuture<?> miIoDiscoveryJob;
  73     protected @Nullable DatagramSocket clientSocket;
  74     private @Nullable Thread socketReceiveThread;
  75     private Set<String> responseIps = new HashSet<>();
  76
  77     private final Logger logger = LoggerFactory.getLogger(MiIoDiscovery.class);
  78     private final CloudConnector cloudConnector;
  79     private Map<String, String> cloudDevices = new ConcurrentHashMap<>();
  80     private @Nullable Configuration miioConfig;
  81
  82     @Activate
  83     public MiIoDiscovery(@Reference CloudConnector cloudConnector, @Reference ConfigurationAdmin configAdmin)
  84             throws IllegalArgumentException {
  85         super(DISCOVERY_TIME);
  86         this.cloudConnector = cloudConnector;
  87         try {
  88             miioConfig = configAdmin.getConfiguration("binding.miio");
  89         } catch (IOException | SecurityException e) {
  90             logger.debug("Error getting configuration: {}", e.getMessage());
  91         }
  92     }
  93
  94     private String getCloudDiscoveryMode() {
  95         if (miioConfig != null) {
  96             try {
  97                 Dictionary<String, @Nullable Object> properties = miioConfig.getProperties();
  98                 String cloudDiscoveryModeConfig;
  99                 if (properties == null) {
 100                     cloudDiscoveryModeConfig = DISABLED;
 101                 } else {
 102                     cloudDiscoveryModeConfig = (String) properties.get("cloudDiscoveryMode");
 103                     if (cloudDiscoveryModeConfig == null) {
 104                         cloudDiscoveryModeConfig = DISABLED;
 105                     } else {
 106                         cloudDiscoveryModeConfig = cloudDiscoveryModeConfig.toLowerCase();
 107                     }
 108                 }
 109                 return Set.of(SUPPORTED, ALL).contains(cloudDiscoveryModeConfig) ? cloudDiscoveryModeConfig : DISABLED;
 110             } catch (ClassCastException | SecurityException e) {
 111                 logger.debug("Error getting cloud discovery configuration: {}", e.getMessage());
 112             }
 113         }
 114         return DISABLED;
 115     }
 116
 117     @Override
 118     public Set<ThingTypeUID> getSupportedThingTypes() {
 119         return SUPPORTED_THING_TYPES_UIDS;
 120     }
 121
 122     @Override
 123     protected void startBackgroundDiscovery() {
 124         logger.debug("Start Xiaomi Mi IO background discovery with cloudDiscoveryMode: {}", getCloudDiscoveryMode());
 125         final @Nullable ScheduledFuture<?> miIoDiscoveryJob = this.miIoDiscoveryJob;
 126         if (miIoDiscoveryJob == null || miIoDiscoveryJob.isCancelled()) {
 127             this.miIoDiscoveryJob = scheduler.scheduleWithFixedDelay(this::discover, 0, SEARCH_INTERVAL,
 128                     TimeUnit.SECONDS);
 129         }
 130     }
 131
 132     @Override
 133     protected void stopBackgroundDiscovery() {
 134         logger.debug("Stop Xiaomi  Mi IO background discovery");
 135         final @Nullable ScheduledFuture<?> miIoDiscoveryJob = this.miIoDiscoveryJob;
 136         if (miIoDiscoveryJob != null) {
 137             miIoDiscoveryJob.cancel(true);
 138             this.miIoDiscoveryJob = null;
 139         }
 140     }
 141
 142     @Override
 143     protected void deactivate() {
 144         stopReceiverThreat();
 145         final DatagramSocket clientSocket = this.clientSocket;
 146         if (clientSocket != null) {
 147             clientSocket.close();
 148         }
 149         this.clientSocket = null;
 150         super.deactivate();
 151     }
 152
 153     @Override
 154     protected void startScan() {
 155         String cloudDiscoveryMode = getCloudDiscoveryMode();
 156         logger.debug("Start Xiaomi Mi IO discovery with cloudDiscoveryMode: {}", cloudDiscoveryMode);
 157         if (!cloudDiscoveryMode.contentEquals(DISABLED)) {
 158             cloudDiscovery();
 159         }
 160         final DatagramSocket clientSocket = getSocket();
 161         if (clientSocket != null) {
 162             logger.debug("Discovery using socket on port {}", clientSocket.getLocalPort());
 163             discover();
 164         } else {
 165             logger.debug("Discovery not started. Client DatagramSocket null");
 166         }
 167     }
 168
 169     private void discover() {
 170         startReceiverThreat();
 171         responseIps = new HashSet<>();
 172         HashSet<String> broadcastAddresses = new HashSet<>();
 173         broadcastAddresses.add("224.0.0.1");
 174         broadcastAddresses.add("224.0.0.50");
 175         broadcastAddresses.addAll(NetUtil.getAllBroadcastAddresses());
 176         for (String broadcastAdress : broadcastAddresses) {
 177             sendDiscoveryRequest(broadcastAdress);
 178         }
 179     }
 180
 181     private void cloudDiscovery() {
 182         String cloudDiscoveryMode = getCloudDiscoveryMode();
 183         cloudDevices.clear();
 184         if (cloudConnector.isConnected()) {
 185             List<CloudDeviceDTO> dv = cloudConnector.getDevicesList();
 186             for (CloudDeviceDTO device : dv) {
 187                 String id = device.getDid();
 188                 if (cloudDiscoveryMode.contentEquals(SUPPORTED)) {
 189                     if (MiIoDevices.getType(device.getModel()).getThingType().equals(THING_TYPE_UNSUPPORTED)) {
 190                         logger.warn("Discovered from cloud, but ignored because not supported: {} {}", id, device);
 191                     }
 192                 }
 193                 if (device.getIsOnline()) {
 194                     logger.debug("Discovered from cloud: {} {}", id, device);
 195                     cloudDevices.put(id, device.getLocalip());
 196                     String token = device.getToken();
 197                     String label = device.getName() + " " + id + " (" + Utils.getHexId(id) + ")";
 198                     String country = device.getServer();
 199                     boolean isOnline = device.getIsOnline();
 200                     String ip = device.getLocalip();
 201                     submitDiscovery(ip, token, id, label, country, isOnline);
 202                 } else {
 203                     logger.debug("Discovered from cloud, but ignored because not online: {} {}", id, device);
 204                 }
 205             }
 206         }
 207     }
 208
 209     private void discovered(String ip, byte[] response) {
 210         logger.trace("Discovery responses from : {}:{}", ip, Utils.getSpacedHex(response));
 211         Message msg = new Message(response);
 212         String token = Utils.getHex(msg.getChecksum());
 213         String hexId = Utils.getHex(msg.getDeviceId());
 214         String id = Utils.fromHEX(hexId);
 215         String label = "Xiaomi Mi Device " + id + " (" + Utils.getHexId(id) + ")";
 216         String country = "";
 217         boolean isOnline = false;
 218         if (ip.equals(cloudDevices.get(id))) {
 219             logger.debug("Skipped adding local found {}. Already discovered by cloud.", label);
 220             return;
 221         }
 222         if (cloudConnector.isConnected()) {
 223             cloudConnector.getDevicesList();
 224             CloudDeviceDTO cloudInfo = cloudConnector.getDeviceInfo(id);
 225             if (cloudInfo != null) {
 226                 logger.debug("Cloud Info: {}", cloudInfo);
 227                 token = cloudInfo.getToken();
 228                 label = cloudInfo.getName() + " " + id + " (" + Utils.getHexId(id) + ")";
 229                 country = cloudInfo.getServer();
 230                 isOnline = cloudInfo.getIsOnline();
 231             }
 232         }
 233         submitDiscovery(ip, token, id, label, country, isOnline);
 234     }
 235
 236     private void submitDiscovery(String ip, String token, String id, String label, String country, boolean isOnline) {
 237         ThingUID uid = new ThingUID(THING_TYPE_MIIO, Utils.getHexId(id).replace(".", "_"));
 238         DiscoveryResultBuilder dr = DiscoveryResultBuilder.create(uid).withProperty(PROPERTY_HOST_IP, ip)
 239                 .withProperty(PROPERTY_DID, id);
 240         if (IGNORED_TOKENS.contains(token)) {
 241             logger.debug("Discovered Mi Device {} ({}) at {} as {}", id, Utils.getHexId(id), ip, uid);
 242             logger.debug(
 243                     "No token discovered for device {}. For options how to get the token, check the binding readme.",
 244                     id);
 245             dr = dr.withRepresentationProperty(PROPERTY_DID).withLabel(label);
 246         } else {
 247             logger.debug("Discovered Mi Device {} ({}) at {} as {} with token {}", id, Utils.getHexId(id), ip, uid,
 248                     token);
 249             dr = dr.withProperty(PROPERTY_TOKEN, token).withRepresentationProperty(PROPERTY_DID)
 250                     .withLabel(label + " with token");
 251         }
 252         if (!country.isEmpty() && isOnline) {
 253             dr = dr.withProperty(PROPERTY_CLOUDSERVER, country);
 254         }
 255         thingDiscovered(dr.build());
 256     }
 257
 258     synchronized @Nullable DatagramSocket getSocket() {
 259         DatagramSocket clientSocket = this.clientSocket;
 260         if (clientSocket != null && clientSocket.isBound()) {
 261             return clientSocket;
 262         }
 263         try {
 264             logger.debug("Getting new socket for discovery");
 265             clientSocket = new DatagramSocket();
 266             clientSocket.setReuseAddress(true);
 267             clientSocket.setBroadcast(true);
 268             this.clientSocket = clientSocket;
 269             return clientSocket;
 270         } catch (SocketException | SecurityException e) {
 271             logger.debug("Error getting socket for discovery: {}", e.getMessage());
 272         }
 273         return null;
 274     }
 275
 276     private void closeSocket() {
 277         final @Nullable DatagramSocket clientSocket = this.clientSocket;
 278         if (clientSocket != null) {
 279             clientSocket.close();
 280         } else {
 281             return;
 282         }
 283         this.clientSocket = null;
 284     }
 285
 286     private void sendDiscoveryRequest(String ipAddress) {
 287         final @Nullable DatagramSocket socket = getSocket();
 288         if (socket != null) {
 289             try {
 290                 byte[] sendData = DISCOVER_STRING;
 291                 logger.trace("Discovery sending ping to {} from {}:{}", ipAddress, socket.getLocalAddress(),
 292                         socket.getLocalPort());
 293                 DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length,
 294                         InetAddress.getByName(ipAddress), PORT);
 295                 for (int i = 1; i <= 1; i++) {
 296                     socket.send(sendPacket);
 297                 }
 298             } catch (IOException e) {
 299                 logger.trace("Discovery on {} error: {}", ipAddress, e.getMessage());
 300             }
 301         }
 302     }
 303
 304     /**
 305      * starts the {@link ReceiverThread} thread
 306      */
 307     private synchronized void startReceiverThreat() {
 308         final Thread srt = socketReceiveThread;
 309         if (srt != null) {
 310             if (srt.isAlive() && !srt.isInterrupted()) {
 311                 return;
 312             }
 313         }
 314         stopReceiverThreat();
 315         Thread socketReceiveThread = new ReceiverThread();
 316         socketReceiveThread.start();
 317         this.socketReceiveThread = socketReceiveThread;
 318     }
 319
 320     /**
 321      * Stops the {@link ReceiverThread} thread
 322      */
 323     private synchronized void stopReceiverThreat() {
 324         if (socketReceiveThread != null) {
 325             socketReceiveThread.interrupt();
 326             socketReceiveThread = null;
 327         }
 328         closeSocket();
 329     }
 330
 331     /**
 332      * The thread, which waits for data and submits the unique results addresses to the discovery results
 333      *
 334      */
 335     private class ReceiverThread extends Thread {
 336         @Override
 337         public void run() {
 338             DatagramSocket socket = getSocket();
 339             if (socket != null) {
 340                 logger.debug("Starting discovery receiver thread for socket on port {}", socket.getLocalPort());
 341                 receiveData(socket);
 342             }
 343         }
 344
 345         /**
 346          * This method waits for data and submits the unique results addresses to the discovery results
 347          *
 348          * @param socket - The multicast socket to (re)use
 349          */
 350         private void receiveData(DatagramSocket socket) {
 351             DatagramPacket receivePacket = new DatagramPacket(new byte[BUFFER_LENGTH], BUFFER_LENGTH);
 352             try {
 353                 while (!interrupted()) {
 354                     logger.trace("Thread {} waiting for data on port {}", this, socket.getLocalPort());
 355                     socket.receive(receivePacket);
 356                     String hostAddress = receivePacket.getAddress().getHostAddress();
 357                     logger.trace("Received {} bytes response from {}:{} on Port {}", receivePacket.getLength(),
 358                             hostAddress, receivePacket.getPort(), socket.getLocalPort());
 359
 360                     byte[] messageBuf = Arrays.copyOfRange(receivePacket.getData(), receivePacket.getOffset(),
 361                             receivePacket.getOffset() + receivePacket.getLength());
 362                     if (logger.isTraceEnabled()) {
 363                         Message miIoResponse = new Message(messageBuf);
 364                         logger.trace("Discovery response received from {} DeviceID: {}\r\n{}", hostAddress,
 365                                 Utils.getHex(miIoResponse.getDeviceId()), miIoResponse.toSting());
 366                     }
 367                     if (!responseIps.contains(hostAddress)) {
 368                         scheduler.schedule(() -> {
 369                             try {
 370                                 discovered(hostAddress, messageBuf);
 371                             } catch (Exception e) {
 372                                 logger.debug("Error submitting discovered Mi IO device at {}", hostAddress, e);
 373                             }
 374                         }, 0, TimeUnit.SECONDS);
 375                     }
 376                     responseIps.add(hostAddress);
 377                 }
 378             } catch (SocketException e) {
 379                 logger.debug("Receiver thread received SocketException: {}", e.getMessage());
 380             } catch (IOException e) {
 381                 logger.trace("Receiver thread was interrupted");
 382             }
 383             logger.debug("Receiver thread ended");
 384         }
 385     }
 386 }