/*
 * Author: Wenbing Zhao
 * Last Modified: 3/31/2007
 * For EEC484/584 Project 
 */

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

public class Bob {
    private DatagramSocket m_socket = null;

    public void runEventLoop() {
	try {
	    LinkStateConfig config = LinkStateConfig.getInstance();
	    int myport = config.getBobPort();
	    m_socket = new DatagramSocket(myport); 
	} catch(Exception e) {
	    System.out.println("Cannot create UDP socket: "+e);
	}

	while(true) {
	    byte[] buffer = new byte[Packet.MAX_PACKET_SIZE]; 
	    DatagramPacket p = 
		new DatagramPacket(buffer, buffer.length);  
	    
	    try {
		m_socket.receive(p); 
	    } catch(Exception e) {
		System.out.println("Cannot receive from socket: "+e);
	    }

	    handlePacket(p);
	}
    }

    private void handlePacket(DatagramPacket p) {
	// retrieve the packet received
	byte[] rawData = p.getData();
	// convert to our Packet object
	Packet packet = new Packet(rawData);

	int msglen = packet.length;
	byte[] msgbytes = new byte[msglen];
	for(int i=0; i<msglen; i++)
	    msgbytes[i] = packet.payload[i];

	System.out.println(new String(msgbytes));
    }

    public static void main(String argsp[]) throws Exception {
	Bob b = new Bob();
	b.runEventLoop();
    }
}