/**
* @return array
*/
private function readRecord()
{
// First the pesky domain names - maybe not so pesky though I suppose
$domain = $this->readDomainLabel();
$ans_header_bin = $this->readResponse(10);
// 10 byte header
$ans_header = unpack('ntype/nclass/Nttl/nlength', $ans_header_bin);
$this->debug('Record Type ' . $ans_header['type'] . ' Class ' . $ans_header['class'] . ' TTL ' . $ans_header['ttl'] . ' Length ' . $ans_header['length']);
$typeid = $this->types->getById($ans_header['type']);
$extras = array();
$data = '';
$string = '';
switch ($typeid) {
case 'A':
$ipbin = $this->readResponse(4);
$ip = inet_ntop($ipbin);
$data = $ip;
$extras['ipbin'] = $ipbin;
$string = $domain . ' has IPv4 address ' . $ip;
break;
case 'AAAA':
$ipbin = $this->readResponse(16);
$ip = inet_ntop($ipbin);
$data = $ip;
$extras['ipbin'] = $ipbin;
$string = $domain . ' has IPv6 address ' . $ip;
break;
case 'CNAME':
$data = $this->readDomainLabel();
$string = $domain . ' alias of ' . $data;
break;
case 'DNAME':
$data = $this->readDomainLabel();
$string = $domain . ' alias of ' . $data;
break;
case 'DNSKEY':
case 'KEY':
$stuff = $this->readResponse(4);
// key type test 21/02/2014 DC
$test = unpack('nflags/cprotocol/calgo', $stuff);
$extras['flags'] = $test['flags'];
$extras['protocol'] = $test['protocol'];
$extras['algorithm'] = $test['algo'];
$data = base64_encode($this->readResponse($ans_header['length'] - 4));
$string = $domain . ' KEY ' . $data;
break;
case "NSEC":
$data = $this->ReadDomainLabel();
$string = $domain . " points to " . $data;
break;
case 'MX':
$prefs = $this->readResponse(2);
$prefs = unpack('nlevel', $prefs);
$extras['level'] = $prefs['level'];
$data = $this->readDomainLabel();
$string = $domain . ' mailserver ' . $data . ' (pri=' . $extras['level'] . ')';
break;
case 'NS':
$nameserver = $this->readDomainLabel();
$data = $nameserver;
$string = $domain . ' nameserver ' . $nameserver;
break;
case 'PTR':
$data = $this->readDomainLabel();
$string = $domain . ' points to ' . $data;
break;
case 'SOA':
// Label First
$data = $this->readDomainLabel();
$responsible = $this->readDomainLabel();
$buffer = $this->readResponse(20);
$extras = unpack('Nserial/Nrefresh/Nretry/Nexpiry/Nminttl', $buffer);
// butfix to NNNNN from nnNNN for 1.01
$dot = strpos($responsible, '.');
if ($dot !== false) {
$responsible[$dot] = '@';
}
$extras['responsible'] = $responsible;
$string = $domain . ' SOA ' . $data . ' Serial ' . $extras['serial'];
break;
case 'SRV':
$prefs = $this->readResponse(6);
$prefs = unpack('npriority/nweight/nport', $prefs);
$extras['priority'] = $prefs['priority'];
$extras['weight'] = $prefs['weight'];
$extras['port'] = $prefs['port'];
$data = $this->readDomainLabel();
$string = $domain . ' SRV ' . $data . ':' . $extras['port'] . ' (pri=' . $extras['priority'] . ', weight=' . $extras['weight'] . ')';
break;
case 'TXT':
case 'SPF':
$data = '';
for ($string_count = 0; strlen($data) + (1 + $string_count) < $ans_header['length']; $string_count++) {
$string_length = ord($this->readResponse(1));
$data .= $this->readResponse($string_length);
}
$string = $domain . ' TEXT "' . $data . '" (in ' . $string_count . ' strings)';
break;
case "NAPTR":
$buffer = $this->ReadResponse(4);
$extras = unpack("norder/npreference", $buffer);
$addonitial = $this->ReadDomainLabel();
$data = $this->ReadDomainLabel();
$extras['service'] = $addonitial;
$string = $domain . " NAPTR " . $data;
break;
}
return array('header' => $ans_header, 'typeid' => $typeid, 'data' => $data, 'domain' => $domain, 'string' => $string, 'extras' => $extras);
}
