/**
* Try to perform reverse lookup for given address; if no reverse lookup
* exists, returns NULL.
*
* @param peer.InetAddress addr
* @return string
*/
public function tryReverseLookup(InetAddress $addr)
{
$ptr = $this->_nativeLookup($addr->reversedNotation(), DNS_PTR);
if (!isset($ptr[0]['target'])) {
return NULL;
}
return $ptr[0]['target'];
}
