/* sample java udp socket program */

import java.io.*;
import java.net.*;

public class udpsocket
{

    static final short cport = 3344;  // local socket port (fixed for server)

 public static void main(String[] args) throws Exception
 {
    DatagramSocket dfd = 
	new DatagramSocket(cport,InetAddress.getByName("0.0.0.0"));
    // to create client-side socket, ... =  new DatagramSocket(); //picks port
    dfd.setBroadcast(true);
    dfd.setSoTimeout(5000); // 5 second timeout
    byte[] inbuffer = new byte[128];
    byte[] outbuffer = new byte[128];
    DatagramPacket inpacket = new DatagramPacket(inbuffer,128);
    DatagramPacket outpacket = 
      new DatagramPacket(outbuffer,128,
			 inpacket.getAddress(),inpacket.getPort());

    /* in general:

       DatagramPacket outpacket = new DatagramPacket(outbuffer,128,
             InetAddress.getByName("10.1.0.2"), 9000);
     
       would set the packet destination ip and destination port.
     */

    // put info into outbuffer...
    myutils.StringToBuf(outbuffer,"hello there!",0);    

    dfd.send(outpacket);  // send

    try
	{  dfd.receive(inpacket); // receive
	}
    catch (SocketTimeoutException ste) {}

    // extract info from inbuffer
    System.out.println(myutils.bufToString(inbuffer,0,inbuffer.length));

    dfd.close();
  // extract info from inbuffer.
 }
}