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   1 /**
   2  * Copyright (c) 2010-2024 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.pjlinkdevice.internal.discovery;
  14
  15 import java.io.IOException;
  16 import java.net.Inet4Address;
  17 import java.net.InetAddress;
  18 import java.net.InterfaceAddress;
  19 import java.net.UnknownHostException;
  20 import java.util.HashMap;
  21 import java.util.Map;
  22 import java.util.Set;
  23
  24 import org.apache.commons.net.util.SubnetUtils;
  25 import org.eclipse.jdt.annotation.NonNullByDefault;
  26 import org.openhab.binding.pjlinkdevice.internal.PJLinkDeviceBindingConstants;
  27 import org.openhab.binding.pjlinkdevice.internal.device.PJLinkDevice;
  28 import org.openhab.binding.pjlinkdevice.internal.device.command.AuthenticationException;
  29 import org.openhab.binding.pjlinkdevice.internal.device.command.ResponseException;
  30 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  31 import org.openhab.core.config.discovery.DiscoveryService;
  32 import org.osgi.service.component.annotations.Component;
  33
  34 /**
  35  * Implementation of {@link AbstractDiscoveryParticipant} for IPv4 address ranges and PJLink Class 1 devices.
  36  *
  37  * @author Nils Schnabel - Initial contribution
  38  */
  39
  40 @Component(service = DiscoveryService.class, configurationPid = "org.openhab.binding.pjlinkdevice.internal.discovery.DiscoveryParticipantClass1")
  41 @NonNullByDefault
  42 public class DiscoveryParticipantClass1 extends AbstractDiscoveryParticipant {
  43     public DiscoveryParticipantClass1() throws IllegalArgumentException {
  44         super(Set.of(PJLinkDeviceBindingConstants.THING_TYPE_PJLINK), 60, true);
  45
  46         logger.trace("PJLinkProjectorDiscoveryParticipant constructor");
  47     }
  48
  49     @Override
  50     protected void collectAddressesToScan(Set<InetAddress> addressesToScan, InterfaceAddress i) {
  51         // only scan IPv4
  52         if (!(i.getAddress() instanceof Inet4Address)) {
  53             return;
  54         }
  55         // only scan Class C networks
  56         if (i.getNetworkPrefixLength() < 24) {
  57             return;
  58         }
  59
  60         SubnetUtils utils = new SubnetUtils(i.getAddress().getHostAddress() + "/" + i.getNetworkPrefixLength());
  61         for (String addressToScan : utils.getInfo().getAllAddresses()) {
  62             try {
  63                 logger.debug("Add address to scan: {}", addressToScan);
  64                 addressesToScan.add(InetAddress.getByName(addressToScan));
  65             } catch (UnknownHostException e) {
  66                 logger.debug("Unknown Host", e);
  67             }
  68         }
  69     }
  70
  71     @Override
  72     protected void checkAddress(InetAddress ip, int tcpPort, int timeout) {
  73         PJLinkDevice device = new PJLinkDevice(tcpPort, ip, null, timeout);
  74         try {
  75             Map<String, Object> properties = new HashMap<>();
  76             properties.put(PJLinkDeviceBindingConstants.PARAMETER_HOSTNAME, ip.getHostAddress());
  77             properties.put(PJLinkDeviceBindingConstants.PARAMETER_PORT, tcpPort);
  78             String description = "Unknown PJLink Device";
  79             try {
  80                 device.checkAvailability();
  81
  82                 try {
  83                     description = device.getFullDescription();
  84                     logger.debug("got name {}", description);
  85                 } catch (ResponseException e) {
  86                     logger.debug("Could not find a name for PJLink device", e);
  87                     // okay, no name
  88                 }
  89             } catch (AuthenticationException e) {
  90                 properties.put(PJLinkDeviceBindingConstants.PROPERTY_AUTHENTICATION_REQUIRED, true);
  91             }
  92             logger.debug("Adding thing");
  93             thingDiscovered(DiscoveryResultBuilder.create(createServiceUID(ip.getHostAddress(), tcpPort))
  94                     .withTTL(PJLinkDeviceBindingConstants.DISCOVERY_RESULT_TTL_SECONDS).withProperties(properties)
  95                     .withLabel(description).build());
  96             logger.debug("Added thing");
  97         } catch (ResponseException | IOException e) {
  98             logger.debug("No PJLinkDevice here {} {}", ip, e.getStackTrace());
  99             // no device here
 100         }
 101     }
 102 }