PRUDPPacketHandler handler = PRUDPPacketHandlerFactory.getHandler( port );
InetSocketAddress destination = new InetSocketAddress(reqUrl.getHost(),reqUrl.getPort()==-1?80:reqUrl.getPort());
handler = handler.openSession( destination );
try{
String failure_reason = null;
for (int retry_loop=0;retry_loop<PRUDPPacketTracker.DEFAULT_RETRY_COUNT;retry_loop++){