<?php
header('Content-Type: application/octet-stream');
header('Content-Length: 32');
$f = fopen('atc_serial.txt', 'r+');
if ($_GET['q'] === 'ja8EedoJ' && flock($f, LOCK_EX)) {
	$serial = fgets($f, 16);
	$serial = $serial + 1;
	echo('TC430-053-0B    ' . date('Ymd') . sprintf('%06u  ', $serial));
	rewind($f);
	ftruncate($f, 0);
	fwrite($f, "$serial");
	fflush($f);
	flock($f, LOCK_UN);
}
fclose($f);
?>