// (c) F. Merciol
// Plus d'informations sur http://m3101.merciol.fr
package network;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;

public class RecvData {
		public static void main (String[] args) {
				if (args.length != 1) {
						System.err.println ("Usage: RecvData port");
						System.exit (1);
				}
				try {
						int port = Integer.parseInt (args [0]);
						DatagramSocket socket = new DatagramSocket (port);

						byte[] buf = new byte[256];
						DatagramPacket packet = new DatagramPacket (buf, buf.length);
						socket.receive (packet);

						String received = new String (packet.getData(), 0, packet.getLength ());
						String srcIP = packet.getAddress ().getHostAddress ();
						int scrPort = packet.getPort (); 
						System.out.println (srcIP+":"+scrPort+" send : "+received);
				} catch (SocketException e) {
						e.printStackTrace ();
				} catch (IOException e) {
						e.printStackTrace ();
				}
		}
}