public function encode()
{
parent::encode();
$this->putAddress($this->address, $this->port, 4);
$this->putShort(0);
for ($i = 0; $i < 10; ++$i) {
$this->putAddress($this->systemAddresses[$i][0], $this->systemAddresses[$i][1], $this->systemAddresses[$i][2]);
}
$this->putLong($this->sendPing);
$this->putLong($this->sendPong);
}