/**
* Implements module logic.
*
* @param \AppserverIo\DnsServer\Interfaces\DnsRequestInterface $request A request object
* @param \AppserverIo\DnsServer\Interfaces\DnsResponseInterface $response A response object
* @param \AppserverIo\Server\Interfaces\RequestContextInterface $requestContext A requests context instance
*
* @return void
*/
public function process(DnsRequestInterface $request, DnsResponseInterface $response, RequestContextInterface $requestContext)
{
// load the answer from our DNS database
$answer = $this->getStackableResolver()->getAnswer($question = $request->getQuestion());
// merge the flags
$flags = array_merge($request->getFlags(), array('qr' => 1, 'ra' => 0));
// prepare the numbers for the encoding
$ancount = count($answer);
$qdcount = count($question);
$nscount = count($authority = $request->getAuthority());
$arcount = count($additional = $request->getAdditional());
// prepare the encoded DNS response
$res = pack('nnnnnn', $request->getData('packet_id'), DnsUtil::singleton()->encodeFlags($flags), $qdcount, $ancount, $nscount, $arcount);
$res .= DnsUtil::singleton()->encodeQuestionResourceRecord($question, strlen($res));
$res .= DnsUtil::singleton()->encodeResourceRecord($answer, strlen($res));
$res .= DnsUtil::singleton()->encodeResourceRecord($authority, strlen($res));
$res .= DnsUtil::singleton()->encodeResourceRecord($additional, strlen($res));
// append the response to the body stream
$response->appendBodyStream($res);
}
/**
* Parses the request data from the passed buffer.
*
* @param string $buffer The buffer to decode the data from
*
* @return void
*/
public function parse($buffer)
{
// create a local copy of the requst
$request = $this->getRequest();
// set the raw data in the request
$request->setRawData($rawData = unpack('npacket_id/nflags/nqdcount/nancount/nnscount/narcount', $buffer));
// load the offset to start extracting the data
$offset = $request->getOffset();
// initialize the request with the extracted DNS values
$request->setFlags(DnsUtil::singleton()->decodeFlags($rawData['flags']));
$request->setQuestion(DnsUtil::singleton()->decodeQuestionResourceRecord($buffer, $offset, $rawData['qdcount']));
$request->setAnswer(DnsUtil::singleton()->decodeResourceRecord($buffer, $offset, $rawData['ancount']));
$request->setAuthority(DnsUtil::singleton()->decodeResourceRecord($buffer, $offset, $rawData['nscount']));
$request->setAdditional(DnsUtil::singleton()->decodeResourceRecord($buffer, $offset, $rawData['arcount']));
}