<?php

function sendUDP($data, $length, $sockhandler = null) {
	global $sock;
	if ($sockhandler == null) {
		$sockhandler = $sock;
	}
	return socket_sendto($sockhandler, $data, $length, 0, "127.0.0.1", get_cfg_var('UDP_PORT'));
}

function recvUDP($sockhandler = null) {
	global $sock;
	if ($sockhandler == null) {
		$sockhandler = $sock;
	}
	socket_recvfrom($sockhandler, $buf, 100, 0, $from, $port);
	return array($buf, $from, $port);
}

function recvUDPWithTimeout($timeout, $sockhandler = null) {
	global $sock;
	if ($sockhandler == null) {
		$sockhandler = $sock;
	}
	$endtime = microtime(true) + ($timeout/1000);
	$buf = "";
	$from = "";
	$port = 0;
	while(microtime(true) < $endtime) {
		socket_recvfrom($sockhandler, $buf, 100, MSG_DONTWAIT, $from, $port);
		// Stop when we have data
		if (strlen($buf) > 0) {
			break;
		}
		sleep(1);
	}
	return array($buf, $from, $port);
}