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Udp.Code. Add ip to white list #877

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Udp.Code. Add ip to white list #877

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51ceffd
Udp.Code. Add ip to white list
datorik Sep 3, 2026
047d6a0
Update dnsResolve function comment for clarity
alexander-b-clean Sep 3, 2026
1883e97
Optimize host validation with IP check
alexander-b-clean Sep 7, 2026
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26 changes: 24 additions & 2 deletions lib/Cleantalk/Common/Helper.php
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Original file line number Diff line number Diff line change
Expand Up @@ -600,11 +600,33 @@ public static function ipResolve($ip)
*/
public static function dnsResolve($host, $out = false)
{
// Check if the $url is set and it is an url
if ( ! $host || ! filter_var($host, FILTER_VALIDATE_URL)) {
// Validate/normalize host (accept hostname or IP; URLs and host:port are also supported)
if ( ! $host || ! is_string($host) ) {
return $out;
}

if ( strpos($host, '://') !== false ) {
$parsed_host = parse_url($host, PHP_URL_HOST);
if ( is_string($parsed_host) && $parsed_host !== '' ) {
$host = $parsed_host;
}
}

if ( strpos($host, ':') !== false && ! filter_var($host, FILTER_VALIDATE_IP) ) {
$host = strstr($host, ':', true);
}

$is_ip = filter_var($host, FILTER_VALIDATE_IP);

if ( ! filter_var($host, FILTER_VALIDATE_DOMAIN, FILTER_FLAG_HOSTNAME)
&& ! $is_ip ) {
return $out;
}
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if ( $is_ip ) {
return $host;
}

// Get DNS records about URL
if (function_exists('dns_get_record')) {
$records = dns_get_record($host, DNS_A);
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