/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.nutsnbolts.util;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
public class MacAddress {
public static byte[] getBytes ()
throws SocketException, UnknownHostException, MacAddressException {
InetAddress localHostAddress;
if ((localHostAddress = InetAddress.getLocalHost()).equals(InetAddress.getLoopbackAddress())) {
throw new MacAddressException("Local host address must != loopback address(%s)", localHostAddress.getHostAddress());
}
for (NetworkInterface network : new EnumerationIterator<>(NetworkInterface.getNetworkInterfaces())) {
byte[] mac;
if (((mac = network.getHardwareAddress()) != null) && (mac.length > 0)) {
for (InetAddress address : new EnumerationIterator<>(network.getInetAddresses())) {
if (address.equals(localHostAddress)) {
return mac;
}
}
}
}
throw new MacAddressException("Found no mac address for the local host address(%s)", localHostAddress.getHostAddress());
}
}