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

   1 /**
   2  * Copyright (c) 2010-2022 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.remoteopenhab.internal.discovery;
  14
  15 import static org.openhab.binding.remoteopenhab.internal.RemoteopenhabBindingConstants.*;
  16 import static org.openhab.binding.remoteopenhab.internal.config.RemoteopenhabServerConfiguration.*;
  17
  18 import java.util.List;
  19 import java.util.Map;
  20 import java.util.Set;
  21 import java.util.stream.Collectors;
  22
  23 import javax.jmdns.ServiceInfo;
  24
  25 import org.eclipse.jdt.annotation.NonNullByDefault;
  26 import org.eclipse.jdt.annotation.Nullable;
  27 import org.openhab.core.config.discovery.DiscoveryResult;
  28 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  29 import org.openhab.core.config.discovery.mdns.MDNSDiscoveryParticipant;
  30 import org.openhab.core.net.NetUtil;
  31 import org.openhab.core.thing.ThingTypeUID;
  32 import org.openhab.core.thing.ThingUID;
  33 import org.osgi.service.component.annotations.Component;
  34 import org.slf4j.Logger;
  35 import org.slf4j.LoggerFactory;
  36
  37 /**
  38  * The {@link RemoteopenhabDiscoveryParticipant} is responsible for discovering
  39  * the remote openHAB servers using mDNS discovery service.
  40  *
  41  * @author Laurent Garnier - Initial contribution
  42  */
  43 @NonNullByDefault
  44 @Component(service = MDNSDiscoveryParticipant.class, configurationPid = "mdnsdiscovery.remoteopenhab")
  45 public class RemoteopenhabDiscoveryParticipant implements MDNSDiscoveryParticipant {
  46
  47     private static final String SERVICE_TYPE = "_openhab-server._tcp.local.";
  48
  49     private final Logger logger = LoggerFactory.getLogger(RemoteopenhabDiscoveryParticipant.class);
  50
  51     @Override
  52     public Set<ThingTypeUID> getSupportedThingTypeUIDs() {
  53         return SUPPORTED_BRIDGE_TYPES_UIDS;
  54     }
  55
  56     @Override
  57     public String getServiceType() {
  58         return SERVICE_TYPE;
  59     }
  60
  61     @Override
  62     public @Nullable ThingUID getThingUID(ServiceInfo service) {
  63         // We use the first host address as thing ID
  64         String ip = (service.getHostAddresses() != null && service.getHostAddresses().length > 0
  65                 && !service.getHostAddresses()[0].isEmpty()) ? service.getHostAddresses()[0].replaceAll("\\[|\\]", "")
  66                         : null;
  67         // Host address matching a local IP address are ignored
  68         if (getServiceType().equals(service.getType()) && ip != null && !matchLocalIpAddress(ip)) {
  69             return new ThingUID(BRIDGE_TYPE_SERVER, ip.replaceAll("[^A-Za-z0-9_]", "_"));
  70         }
  71         return null;
  72     }
  73
  74     private boolean matchLocalIpAddress(String ipAddress) {
  75         List<String> localIpAddresses = NetUtil.getAllInterfaceAddresses().stream()
  76                 .filter(a -> !a.getAddress().isLinkLocalAddress())
  77                 .map(a -> a.getAddress().getHostAddress().split("%")[0]).collect(Collectors.toList());
  78         return localIpAddresses.contains(ipAddress);
  79     }
  80
  81     @Override
  82     public @Nullable DiscoveryResult createResult(ServiceInfo service) {
  83         logger.debug("createResult ServiceInfo: {}", service);
  84         DiscoveryResult result = null;
  85         String ip = (service.getHostAddresses() != null && service.getHostAddresses().length > 0
  86                 && !service.getHostAddresses()[0].isEmpty()) ? service.getHostAddresses()[0].replaceAll("\\[|\\]", "")
  87                         : null;
  88         String restPath = service.getPropertyString("uri");
  89         ThingUID thingUID = getThingUID(service);
  90         if (thingUID != null && ip != null && restPath != null) {
  91             logger.debug("Create a DiscoveryResult for remote openHAB server {} with IP {}", thingUID, ip);
  92             Map<String, Object> properties = Map.of(HOST, ip, REST_PATH, restPath);
  93             result = DiscoveryResultBuilder.create(thingUID).withProperties(properties).withRepresentationProperty(HOST)
  94                     .withLabel("@text/discovery.server.label").build();
  95         }
  96         return result;
  97     }
  98 }