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   1 /**
   2  * Copyright (c) 2010-2023 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.silvercrestwifisocket.internal.utils;
  14
  15 import java.net.InetAddress;
  16 import java.net.InterfaceAddress;
  17 import java.net.NetworkInterface;
  18 import java.net.SocketException;
  19 import java.util.ArrayList;
  20 import java.util.Enumeration;
  21 import java.util.Iterator;
  22 import java.util.List;
  23
  24 /**
  25  * Utilitary static class to perform some network routines.
  26  *
  27  * @author Jaime Vaz - Initial contribution
  28  *
  29  */
  30 public final class NetworkUtils {
  31
  32     private NetworkUtils() {
  33         // Avoid instantiation.
  34     }
  35
  36     /**
  37      * Gets all the broadcast address's from the machine.
  38      *
  39      * @return list with all the broadcast address's
  40      */
  41     public static List<InetAddress> getAllBroadcastAddresses() {
  42         List<InetAddress> listOfBroadcasts = new ArrayList<>();
  43         Enumeration<NetworkInterface> list;
  44         try {
  45             list = NetworkInterface.getNetworkInterfaces();
  46
  47             while (list.hasMoreElements()) {
  48                 NetworkInterface iface = list.nextElement();
  49                 if (iface == null) {
  50                     continue;
  51                 }
  52                 if (!iface.isLoopback() && iface.isUp()) {
  53                     Iterator<InterfaceAddress> it = iface.getInterfaceAddresses().iterator();
  54                     while (it.hasNext()) {
  55                         InterfaceAddress address = it.next();
  56                         if (address == null) {
  57                             continue;
  58                         }
  59                         InetAddress broadcast = address.getBroadcast();
  60                         if (broadcast != null) {
  61                             listOfBroadcasts.add(broadcast);
  62                         }
  63                     }
  64                 }
  65             }
  66         } catch (SocketException ex) {
  67             return new ArrayList<>();
  68         }
  69         return listOfBroadcasts;
  70     }
  71 }