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add forward-confirmed reverse DNS

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Bui 2014-10-06 03:37:13 +09:00 • committed by czaks
parent 6804a2ede0
commit 8b9932218f
2 changed files with 9 additions and 1 deletions
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5
inc/functions.php
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@ -2265,6 +2265,7 @@ function rDNS($ip_addr) {
if (!$config['dns_system']) {
$host = gethostbyaddr($ip_addr);
$isip = filter_var($host, FILTER_VALIDATE_IP);
} else {
$resp = shell_exec_error('host -W 1 ' . $ip_addr);
if (preg_match('/domain name pointer ([^\s]+)$/', $resp, $m))
@ -2273,6 +2274,10 @@ function rDNS($ip_addr) {
$host = $ip_addr;
}
if ($config['fcrdns'] && !$isip && gethostbyname($host) != $ip_addr) {
$host = $ip_addr;
}
if ($config['cache']['enabled'])
cache::set('rdns_' . $ip_addr, $host);