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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.ipp.internal.discovery;
  14
  15 import static org.openhab.binding.ipp.internal.IppBindingConstants.*;
  16
  17 import java.net.InetAddress;
  18 import java.util.Map;
  19 import java.util.Set;
  20
  21 import javax.jmdns.ServiceInfo;
  22
  23 import org.eclipse.jdt.annotation.NonNullByDefault;
  24 import org.eclipse.jdt.annotation.Nullable;
  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  * discovers ipp printers announced by mDNS
  36  *
  37  * @author Tobias Bräutigam - Initial contribution
  38  */
  39 @Component
  40 @NonNullByDefault
  41 public class IppPrinterDiscoveryParticipant implements MDNSDiscoveryParticipant {
  42
  43     private final Logger logger = LoggerFactory.getLogger(IppPrinterDiscoveryParticipant.class);
  44
  45     @Override
  46     public Set<ThingTypeUID> getSupportedThingTypeUIDs() {
  47         return Set.of(PRINTER_THING_TYPE);
  48     }
  49
  50     @Override
  51     public String getServiceType() {
  52         return "_ipp._tcp.local.";
  53     }
  54
  55     @Override
  56     public @Nullable ThingUID getThingUID(ServiceInfo service) {
  57         logger.trace("ServiceInfo: {}", service);
  58         if (getServiceType().equals(service.getType())) {
  59             String uidName = getUIDName(service);
  60             return new ThingUID(PRINTER_THING_TYPE, uidName);
  61         }
  62         return null;
  63     }
  64
  65     private String getUIDName(ServiceInfo service) {
  66         return service.getName().replaceAll("[^A-Za-z0-9_]", "_");
  67     }
  68
  69     private @Nullable InetAddress getIpAddress(ServiceInfo service) {
  70         for (InetAddress addr : service.getInet4Addresses()) {
  71             return addr;
  72         }
  73         // Fallback for Inet6addresses
  74         for (InetAddress addr : service.getInet6Addresses()) {
  75             return addr;
  76         }
  77         return null;
  78     }
  79
  80     @Override
  81     public @Nullable DiscoveryResult createResult(ServiceInfo service) {
  82         String rp = service.getPropertyString("rp");
  83         if (rp == null) {
  84             return null;
  85         }
  86         ThingUID uid = getThingUID(service);
  87         if (uid != null) {
  88             // remove the domain from the name
  89             InetAddress ip = getIpAddress(service);
  90             if (ip == null) {
  91                 return null;
  92             }
  93             String inetAddress = ip.toString().substring(1); // trim leading slash
  94             String label = service.getName();
  95             int port = service.getPort();
  96             String uuid = service.getPropertyString("UUID");
  97
  98             Map<String, Object> properties = Map.of( //
  99                     PRINTER_PARAMETER_URL, "http://" + inetAddress + ":" + port + "/" + rp, //
 100                     PRINTER_PARAMETER_NAME, label, //
 101                     PRINTER_PARAMETER_UUID, uuid //
 102             );
 103
 104             return DiscoveryResultBuilder.create(uid).withProperties(properties)
 105                     .withRepresentationProperty(PRINTER_PARAMETER_UUID).withLabel(label).build();
 106         }
 107         return null;
 108     }
 109 }