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<?php
require('func.php');
$data = file_get_contents('/var/lib/dhcp/dhcpd.leases');
preg_match_all('/lease ([\d\.]+) \{[^\}]+ends \d+ (\d{4}\/\d{2}\/\d{2} \d+:\d{2}:\d{2});[^\}]+}/s', $data, $match);
unset($data, $match[0]);
$dend = time()-120;
$clients = 0;
foreach($match[2] as $timeout) {
$end = strtotime($timeout.' UTC');
if($end > $dend) $clients++;
}
$data = 'clients,host={{ ansible_hostname }},type=backend value='.$clients;
sendflux($data);
?>
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