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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.androiddebugbridge.internal;
  14
  15 import static org.openhab.binding.androiddebugbridge.internal.AndroidDebugBridgeBindingConstants.*;
  16
  17 import java.io.IOException;
  18 import java.net.Inet4Address;
  19 import java.net.InetAddress;
  20 import java.net.NetworkInterface;
  21 import java.net.SocketException;
  22 import java.util.Collections;
  23 import java.util.Dictionary;
  24 import java.util.Enumeration;
  25 import java.util.HashMap;
  26 import java.util.Map;
  27 import java.util.concurrent.ExecutionException;
  28 import java.util.concurrent.TimeoutException;
  29 import java.util.function.Function;
  30 import java.util.stream.Collectors;
  31
  32 import org.eclipse.jdt.annotation.NonNullByDefault;
  33 import org.eclipse.jdt.annotation.Nullable;
  34 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  35 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  36 import org.openhab.core.config.discovery.DiscoveryService;
  37 import org.openhab.core.thing.Thing;
  38 import org.openhab.core.thing.ThingUID;
  39 import org.osgi.service.cm.Configuration;
  40 import org.osgi.service.cm.ConfigurationAdmin;
  41 import org.osgi.service.component.annotations.Activate;
  42 import org.osgi.service.component.annotations.Component;
  43 import org.osgi.service.component.annotations.Reference;
  44 import org.slf4j.Logger;
  45 import org.slf4j.LoggerFactory;
  46
  47 /**
  48  * The {@link AndroidDebugBridgeDiscoveryService} discover Android ADB Instances in the network.
  49  *
  50  * @author Miguel Alvarez - Initial contribution
  51  */
  52 @NonNullByDefault
  53 @Component(service = DiscoveryService.class, configurationPid = "discovery.androiddebugbridge")
  54 public class AndroidDebugBridgeDiscoveryService extends AbstractDiscoveryService {
  55     static final int TIMEOUT_MS = 60000;
  56     private static final long DISCOVERY_RESULT_TTL_SEC = 300;
  57     public static final String LOCAL_INTERFACE_IP = "127.0.0.1";
  58     public static final int MAX_RETRIES = 2;
  59     private final Logger logger = LoggerFactory.getLogger(AndroidDebugBridgeDiscoveryService.class);
  60     private final ConfigurationAdmin admin;
  61     private boolean discoveryRunning = false;
  62
  63     @Activate
  64     public AndroidDebugBridgeDiscoveryService(@Reference ConfigurationAdmin admin) {
  65         super(SUPPORTED_THING_TYPES, TIMEOUT_MS, false);
  66         this.admin = admin;
  67     }
  68
  69     @Override
  70     protected void startScan() {
  71         logger.debug("scan started: searching android devices");
  72         discoveryRunning = true;
  73         Enumeration<NetworkInterface> nets;
  74         AndroidDebugBridgeBindingConfiguration configuration = getConfig();
  75         if (configuration == null) {
  76             return;
  77         }
  78         try {
  79             nets = NetworkInterface.getNetworkInterfaces();
  80             for (NetworkInterface netint : Collections.list(nets)) {
  81                 Enumeration<InetAddress> inetAddresses = netint.getInetAddresses();
  82                 for (InetAddress inetAddress : Collections.list(inetAddresses)) {
  83                     if (!discoveryRunning) {
  84                         break;
  85                     }
  86                     if (!(inetAddress instanceof Inet4Address)
  87                             || inetAddress.getHostAddress().equals(LOCAL_INTERFACE_IP)) {
  88                         continue;
  89                     }
  90                     String[] ipParts = inetAddress.getHostAddress().split("\\.");
  91                     for (int i = configuration.discoveryIpRangeMin; i <= configuration.discoveryIpRangeMax; i++) {
  92                         if (!discoveryRunning) {
  93                             break;
  94                         }
  95                         ipParts[3] = Integer.toString(i);
  96                         String currentIp = String.join(".", ipParts);
  97                         try {
  98                             var currentAddress = InetAddress.getByName(currentIp);
  99                             logger.debug("address: {}", currentIp);
 100                             if (currentAddress.isReachable(configuration.discoveryReachableMs)) {
 101                                 logger.debug("Reachable ip: {}", currentIp);
 102                                 int retries = 0;
 103                                 while (retries < MAX_RETRIES) {
 104                                     try {
 105                                         discoverWithADB(currentIp, configuration.discoveryPort);
 106                                     } catch (AndroidDebugBridgeDeviceReadException | TimeoutException e) {
 107                                         retries++;
 108                                         if (retries < MAX_RETRIES) {
 109                                             logger.debug("retrying - pending {}", MAX_RETRIES - retries);
 110                                             continue;
 111                                         }
 112                                         throw e;
 113                                     }
 114                                     break;
 115                                 }
 116                             }
 117                         } catch (IOException | AndroidDebugBridgeDeviceException | AndroidDebugBridgeDeviceReadException
 118                                 | TimeoutException | ExecutionException e) {
 119                             logger.debug("Error connecting to device at {}: {}", currentIp, e.getMessage());
 120                         }
 121                     }
 122                 }
 123             }
 124         } catch (SocketException | InterruptedException e) {
 125             logger.warn("Error while discovering: {}", e.getMessage());
 126         }
 127     }
 128
 129     private void discoverWithADB(String ip, int port) throws InterruptedException, AndroidDebugBridgeDeviceException,
 130             AndroidDebugBridgeDeviceReadException, TimeoutException, ExecutionException {
 131         var device = new AndroidDebugBridgeDevice(scheduler);
 132         device.configure(ip, port, 10, 0);
 133         try {
 134             device.connect();
 135             logger.debug("connected adb at {}:{}", ip, port);
 136             String serialNo = device.getSerialNo();
 137             String model = device.getModel();
 138             String androidVersion = device.getAndroidVersion();
 139             String brand = device.getBrand();
 140             logger.debug("discovered: {} - {} - {} - {}", model, serialNo, androidVersion, brand);
 141             onDiscoverResult(serialNo, ip, port, model, androidVersion, brand);
 142         } finally {
 143             device.disconnect();
 144         }
 145     }
 146
 147     @Override
 148     protected void stopScan() {
 149         super.stopScan();
 150         discoveryRunning = false;
 151         logger.debug("scan stopped");
 152     }
 153
 154     private void onDiscoverResult(String serialNo, String ip, int port, String model, String androidVersion,
 155             String brand) {
 156         Map<String, Object> properties = new HashMap<>();
 157         properties.put(Thing.PROPERTY_SERIAL_NUMBER, serialNo);
 158         properties.put(PARAMETER_IP, ip);
 159         properties.put(PARAMETER_PORT, port);
 160         properties.put(Thing.PROPERTY_MODEL_ID, model);
 161         properties.put(Thing.PROPERTY_VENDOR, brand);
 162         properties.put(Thing.PROPERTY_FIRMWARE_VERSION, androidVersion);
 163         thingDiscovered(DiscoveryResultBuilder.create(new ThingUID(THING_TYPE_ANDROID_DEVICE, serialNo))
 164                 .withTTL(DISCOVERY_RESULT_TTL_SEC).withRepresentationProperty(Thing.PROPERTY_SERIAL_NUMBER)
 165                 .withProperties(properties).withLabel(String.format("%s (%s)", model, serialNo)).build());
 166     }
 167
 168     private @Nullable AndroidDebugBridgeBindingConfiguration getConfig() {
 169         try {
 170             Configuration configOnline = admin.getConfiguration(BINDING_CONFIGURATION_PID, null);
 171             if (configOnline != null) {
 172                 Dictionary<String, Object> props = configOnline.getProperties();
 173                 if (props != null) {
 174                     Map<String, Object> propMap = Collections.list(props.keys()).stream()
 175                             .collect(Collectors.toMap(Function.identity(), props::get));
 176                     return new org.openhab.core.config.core.Configuration(propMap)
 177                             .as(AndroidDebugBridgeBindingConfiguration.class);
 178                 }
 179             }
 180         } catch (IOException e) {
 181             logger.warn("Unable to read configuration: {}", e.getMessage());
 182         }
 183         return null;
 184     }
 185 }