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/**
* $Revision$
* $Date$
*
* Copyright (C) 2007 Jive Software. All rights reserved.
*
* This software is published under the terms of the GNU Public License (GPL),
* a copy of which is included in this distribution.
*/
package org.jivesoftware.openfire.mediaproxy;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
/**
* Listen packets from defined dataSocket and send packets to the defined host.
* But also provides a mechanism to dynamic bind host and port implementing DatagramListener methods to
* change the host and port values according to the received packets.
*
* @author Thiago Camargo
*/
public class DynamicAddressChannel extends Channel implements Runnable, DatagramListener {
private int c = 0;
/**
* Default Channel Constructor
*
* @param dataSocket datasocket to used to send and receive packets
* @param host default destination host for received packets
* @param port default destination port for received packets
*/
public DynamicAddressChannel(DatagramSocket dataSocket, InetAddress host, int port) {
super(dataSocket, host, port);
}
boolean handle(DatagramPacket packet) {
// Relay Destination
if (c++ < 100) { // 100 packets are enough to discover relay address
this.setHost(packet.getAddress());
this.setPort(packet.getPort());
return true;
} else {
c = 1000; // Prevents long overflow
// Check Source Address. If it's different, discard packet.
return this.getHost().equals(packet.getAddress());
}
}
/**
* Implement DatagramListener method.
* Set the host and port value to the host and port value from the received packet.
*
* @param datagramPacket the received packet
*/
public boolean datagramReceived(DatagramPacket datagramPacket) {
this.relayPacket(datagramPacket);
return false;
}
}