/*
* This file is part of dhcp4java, a DHCP API for the Java language.
* (c) 2006 Stephan Hadinger
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.dhcp4java.examples;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import org.dhcp4java.DHCPConstants;
import org.dhcp4java.DHCPPacket;
/**
* A simple DHCP sniffer.
*
* @author Stephan Hadinger
* @version 1.00
*/
public class DHCPSniffer {
private DHCPSniffer() {
throw new UnsupportedOperationException();
}
public static void main(String[] args) {
try {
DatagramSocket socket = new DatagramSocket(DHCPConstants.BOOTP_REQUEST_PORT);
while (true) {
DatagramPacket pac = new DatagramPacket(new byte[1500], 1500);
DHCPPacket dhcp;
socket.receive(pac);
dhcp = DHCPPacket.getPacket(pac);
System.out.println(dhcp.toString());
}
} catch (Exception e) {
e.printStackTrace();
}
}
}