Current File : //opt/cpanel/ea-wappspector/vendor/rector/rector/vendor/react/dns/src/Query/HostsFileExecutor.php
<?php
namespace RectorPrefix202411\React\Dns\Query;
use RectorPrefix202411\React\Dns\Config\HostsFile;
use RectorPrefix202411\React\Dns\Model\Message;
use RectorPrefix202411\React\Dns\Model\Record;
use RectorPrefix202411\React\Promise;
/**
* Resolves hosts from the given HostsFile or falls back to another executor
*
* If the host is found in the hosts file, it will not be passed to the actual
* DNS executor. If the host is not found in the hosts file, it will be passed
* to the DNS executor as a fallback.
*/
final class HostsFileExecutor implements ExecutorInterface
{
private $hosts;
private $fallback;
public function __construct(HostsFile $hosts, ExecutorInterface $fallback)
{
$this->hosts = $hosts;
$this->fallback = $fallback;
}
public function query(Query $query)
{
if ($query->class === Message::CLASS_IN && ($query->type === Message::TYPE_A || $query->type === Message::TYPE_AAAA)) {
// forward lookup for type A or AAAA
$records = array();
$expectsColon = $query->type === Message::TYPE_AAAA;
foreach ($this->hosts->getIpsForHost($query->name) as $ip) {
// ensure this is an IPv4/IPV6 address according to query type
if ((\strpos($ip, ':') !== \false) === $expectsColon) {
$records[] = new Record($query->name, $query->type, $query->class, 0, $ip);
}
}
if ($records) {
return Promise\resolve(Message::createResponseWithAnswersForQuery($query, $records));
}
} elseif ($query->class === Message::CLASS_IN && $query->type === Message::TYPE_PTR) {
// reverse lookup: extract IPv4 or IPv6 from special `.arpa` domain
$ip = $this->getIpFromHost($query->name);
if ($ip !== null) {
$records = array();
foreach ($this->hosts->getHostsForIp($ip) as $host) {
$records[] = new Record($query->name, $query->type, $query->class, 0, $host);
}
if ($records) {
return Promise\resolve(Message::createResponseWithAnswersForQuery($query, $records));
}
}
}
return $this->fallback->query($query);
}
private function getIpFromHost($host)
{
if (\substr($host, -13) === '.in-addr.arpa') {
// IPv4: read as IP and reverse bytes
$ip = @\inet_pton(\substr($host, 0, -13));
if ($ip === \false || isset($ip[4])) {
return null;
}
return \inet_ntop(\strrev($ip));
} elseif (\substr($host, -9) === '.ip6.arpa') {
// IPv6: replace dots, reverse nibbles and interpret as hexadecimal string
$ip = @\inet_ntop(\pack('H*', \strrev(\str_replace('.', '', \substr($host, 0, -9)))));
if ($ip === \false) {
return null;
}
return $ip;
} else {
return null;
}
}
}
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