M2

M2.js

function sendPacket() {
  port++;

  if (tries >= 3) {
    tries = 0;
    ttl++;
  }
  tries++;

  udpSocket.setTTL(ttl);
  startTime = process.hrtime();
  udpSocket.send(new Buffer(''), 0, 0, port, DESTINATION_IP, function (err) {
    if (err) throw err;
    timeout = setTimeout(handleReply, MAX_TIMEOUT_IN_MILLISECONDS);
  });
}