function send()
{
$response = new dhcpPacket();
$response->setData('op', dhcpPacket::int2hex(1));
$response->setData('xid', '12345678');
// $response->setData('chaddr', );
$response->setData('htype', '00');
$response->setData('hlen', '00');
$response->setData('ciaddr', dhcpPacket::ip2hex(array(129, 21, 50, 223)));
$response->setData('message_type', 'DHCPLEASEQUERY');
$responseData = $response->build();
$error = socket_sendto($this->socket, $responseData, strlen($responseData), 0, '129.21.49.137', 67);
print_r($error);
if ($error === FALSE) {
print "Send failed for address";
}
}
