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   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.pulseaudio.internal.discovery;
  14
  15 import java.io.IOException;
  16 import java.net.Socket;
  17 import java.util.HashMap;
  18 import java.util.Map;
  19 import java.util.Set;
  20
  21 import javax.jmdns.ServiceInfo;
  22
  23 import org.openhab.binding.pulseaudio.internal.PulseaudioBindingConstants;
  24 import org.openhab.binding.pulseaudio.internal.handler.PulseaudioBridgeHandler;
  25 import org.openhab.core.config.discovery.DiscoveryResult;
  26 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  27 import org.openhab.core.config.discovery.mdns.MDNSDiscoveryParticipant;
  28 import org.openhab.core.thing.ThingTypeUID;
  29 import org.openhab.core.thing.ThingUID;
  30 import org.osgi.service.component.annotations.Component;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 /**
  35  * The {@link PulseaudioDiscoveryParticipant} is responsible processing the
  36  * results of searches for mDNS services of type _pulse-server._tcp.local.
  37  *
  38  * @author Tobias Bräutigam - Initial contribution
  39  */
  40 @Component
  41 public class PulseaudioDiscoveryParticipant implements MDNSDiscoveryParticipant {
  42
  43     private final Logger logger = LoggerFactory.getLogger(PulseaudioDiscoveryParticipant.class);
  44
  45     @Override
  46     public Set<ThingTypeUID> getSupportedThingTypeUIDs() {
  47         return PulseaudioBridgeHandler.SUPPORTED_THING_TYPES_UIDS;
  48     }
  49
  50     @Override
  51     public DiscoveryResult createResult(ServiceInfo info) {
  52         DiscoveryResult result = null;
  53         ThingUID uid = getThingUID(info);
  54         if (uid != null) {
  55             Map<String, Object> properties = new HashMap<>(3);
  56             String label = "Pulseaudio server";
  57             try {
  58                 label = info.getName();
  59             } catch (Exception e) {
  60                 // ignore and use default label
  61             }
  62             // remove the domain from the name
  63             String hostname = info.getServer().replace("." + info.getDomain() + ".", "");
  64             try (Socket testSocket = new Socket(hostname, 4712)) {
  65                 logger.debug("testing connection to pulseaudio server {}:4712", hostname);
  66
  67                 if (testSocket.isConnected()) {
  68                     properties.put(PulseaudioBindingConstants.BRIDGE_PARAMETER_HOST, hostname);
  69                     // we do not read the port here because the given port is 4713 and we need 4712 to query the server
  70                     result = DiscoveryResultBuilder.create(uid).withProperties(properties).withLabel(label).build();
  71
  72                     logger.trace("Created a DiscoveryResult for device '{}' on host '{}'", info.getName(), hostname);
  73                 }
  74                 return result;
  75             } catch (IOException e) {
  76             }
  77         }
  78         return result;
  79     }
  80
  81     @Override
  82     public ThingUID getThingUID(ServiceInfo info) {
  83         if (info != null) {
  84             logger.debug("ServiceInfo: {}", info);
  85             if (info.getType() != null) {
  86                 if (info.getType().equals(getServiceType())) {
  87                     logger.trace("Discovered a pulseaudio server thing with name '{}'", info.getName());
  88                     return new ThingUID(PulseaudioBindingConstants.BRIDGE_THING_TYPE,
  89                             info.getName().replace("@", "_AT_"));
  90                 }
  91             }
  92         }
  93         return null;
  94     }
  95
  96     @Override
  97     public String getServiceType() {
  98         return "_pulse-server._tcp.local.";
  99     }
 100 }