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   1 /**
   2  * Copyright (c) 2010-2020 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.miele.internal.discovery;
  14
  15 import java.io.IOException;
  16 import java.net.InetAddress;
  17 import java.net.Socket;
  18 import java.util.Collections;
  19 import java.util.HashMap;
  20 import java.util.Map;
  21 import java.util.Set;
  22
  23 import javax.jmdns.ServiceInfo;
  24
  25 import org.openhab.binding.miele.internal.MieleBindingConstants;
  26 import org.openhab.core.config.discovery.DiscoveryResult;
  27 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  28 import org.openhab.core.config.discovery.mdns.MDNSDiscoveryParticipant;
  29 import org.openhab.core.config.discovery.mdns.internal.MDNSDiscoveryService;
  30 import org.openhab.core.thing.ThingTypeUID;
  31 import org.openhab.core.thing.ThingUID;
  32 import org.osgi.service.component.annotations.Component;
  33 import org.slf4j.Logger;
  34 import org.slf4j.LoggerFactory;
  35
  36 /**
  37  * The {@link MieleMDNSDiscoveryParticipant} is responsible for discovering Miele XGW3000 Gateways. It uses the central
  38  * {@link MDNSDiscoveryService}.
  39  *
  40  * @author Karel Goderis - Initial contribution
  41  * @author Martin Lepsy - Added check for Miele gateway for cleaner discovery
  42  *
  43  */
  44 @Component
  45 public class MieleMDNSDiscoveryParticipant implements MDNSDiscoveryParticipant {
  46
  47     private final Logger logger = LoggerFactory.getLogger(MieleMDNSDiscoveryParticipant.class);
  48     private static final String PATH_TO_CHECK_FOR_XGW3000 = "/rest/";
  49     private static final String SERVICE_NAME = "mieleathome";
  50     private static final String PATH_PROPERTY_NAME = "path";
  51
  52     @Override
  53     public Set<ThingTypeUID> getSupportedThingTypeUIDs() {
  54         return Collections.singleton(MieleBindingConstants.THING_TYPE_XGW3000);
  55     }
  56
  57     @Override
  58     public String getServiceType() {
  59         return "_mieleathome._tcp.local.";
  60     }
  61
  62     @Override
  63     public DiscoveryResult createResult(ServiceInfo service) {
  64         if (isMieleGateway(service)) {
  65             ThingUID uid = getThingUID(service);
  66
  67             if (uid != null) {
  68                 Map<String, Object> properties = new HashMap<>(2);
  69
  70                 InetAddress[] addresses = service.getInetAddresses();
  71                 if (addresses.length > 0 && addresses[0] != null) {
  72                     properties.put(MieleBindingConstants.HOST, addresses[0].getHostAddress());
  73
  74                     Socket socket = null;
  75                     try {
  76                         socket = new Socket(addresses[0], 80);
  77                         InetAddress ourAddress = socket.getLocalAddress();
  78                         properties.put(MieleBindingConstants.INTERFACE, ourAddress.getHostAddress());
  79                     } catch (IOException e) {
  80                         logger.error("An exception occurred while connecting to the Miele Gateway : '{}'",
  81                                 e.getMessage());
  82                     }
  83                 }
  84
  85                 return DiscoveryResultBuilder.create(uid).withProperties(properties)
  86                         .withRepresentationProperty(uid.getId()).withLabel("Miele XGW3000 Gateway").build();
  87             }
  88         }
  89         return null;
  90     }
  91
  92     @Override
  93     public ThingUID getThingUID(ServiceInfo service) {
  94         if (service.getType() != null) {
  95             if (service.getType().equals(getServiceType())) {
  96                 logger.trace("Discovered a Miele@Home gateway thing with name '{}'", service.getName());
  97                 return new ThingUID(MieleBindingConstants.THING_TYPE_XGW3000, service.getName().replace(" ", "_"));
  98             }
  99         }
 100
 101         return null;
 102     }
 103
 104     /**
 105      * Checks if service is a Miele XGW3000 Gateway
 106      *
 107      * application must be mieleathome
 108      * must contain path with value /rest/
 109      *
 110      * @param service the service to check
 111      * @return true, if the discovered service is a Miele XGW3000 Gateway
 112      */
 113     private boolean isMieleGateway(ServiceInfo service) {
 114         return service.getApplication().contains(SERVICE_NAME) && service.getPropertyString(PATH_PROPERTY_NAME) != null
 115                 && service.getPropertyString(PATH_PROPERTY_NAME).equalsIgnoreCase(PATH_TO_CHECK_FOR_XGW3000);
 116     }
 117 }