diff options
Diffstat (limited to 'assets/php/vendor/react/dns/src/Protocol/Parser.php')
| -rwxr-xr-x | assets/php/vendor/react/dns/src/Protocol/Parser.php | 254 |
1 files changed, 0 insertions, 254 deletions
diff --git a/assets/php/vendor/react/dns/src/Protocol/Parser.php b/assets/php/vendor/react/dns/src/Protocol/Parser.php deleted file mode 100755 index 1191cd3..0000000 --- a/assets/php/vendor/react/dns/src/Protocol/Parser.php +++ /dev/null @@ -1,254 +0,0 @@ -<?php - -namespace React\Dns\Protocol; - -use React\Dns\Model\Message; -use React\Dns\Model\Record; -use InvalidArgumentException; - -/** - * DNS protocol parser - * - * Obsolete and uncommon types and classes are not implemented. - */ -class Parser -{ - /** - * Parses the given raw binary message into a Message object - * - * @param string $data - * @throws InvalidArgumentException - * @return Message - */ - public function parseMessage($data) - { - $message = new Message(); - if ($this->parse($data, $message) !== $message) { - throw new InvalidArgumentException('Unable to parse binary message'); - } - - return $message; - } - - /** - * @deprecated unused, exists for BC only - */ - public function parseChunk($data, Message $message) - { - return $this->parse($data, $message); - } - - private function parse($data, Message $message) - { - $message->data .= $data; - - if (!$message->header->get('id')) { - if (!$this->parseHeader($message)) { - return; - } - } - - if ($message->header->get('qdCount') != count($message->questions)) { - if (!$this->parseQuestion($message)) { - return; - } - } - - if ($message->header->get('anCount') != count($message->answers)) { - if (!$this->parseAnswer($message)) { - return; - } - } - - return $message; - } - - public function parseHeader(Message $message) - { - if (strlen($message->data) < 12) { - return; - } - - $header = substr($message->data, 0, 12); - $message->consumed += 12; - - list($id, $fields, $qdCount, $anCount, $nsCount, $arCount) = array_values(unpack('n*', $header)); - - $rcode = $fields & bindec('1111'); - $z = ($fields >> 4) & bindec('111'); - $ra = ($fields >> 7) & 1; - $rd = ($fields >> 8) & 1; - $tc = ($fields >> 9) & 1; - $aa = ($fields >> 10) & 1; - $opcode = ($fields >> 11) & bindec('1111'); - $qr = ($fields >> 15) & 1; - - $vars = compact('id', 'qdCount', 'anCount', 'nsCount', 'arCount', - 'qr', 'opcode', 'aa', 'tc', 'rd', 'ra', 'z', 'rcode'); - - - foreach ($vars as $name => $value) { - $message->header->set($name, $value); - } - - return $message; - } - - public function parseQuestion(Message $message) - { - if (strlen($message->data) < 2) { - return; - } - - $consumed = $message->consumed; - - list($labels, $consumed) = $this->readLabels($message->data, $consumed); - - if (null === $labels) { - return; - } - - if (strlen($message->data) - $consumed < 4) { - return; - } - - list($type, $class) = array_values(unpack('n*', substr($message->data, $consumed, 4))); - $consumed += 4; - - $message->consumed = $consumed; - - $message->questions[] = array( - 'name' => implode('.', $labels), - 'type' => $type, - 'class' => $class, - ); - - if ($message->header->get('qdCount') != count($message->questions)) { - return $this->parseQuestion($message); - } - - return $message; - } - - public function parseAnswer(Message $message) - { - if (strlen($message->data) < 2) { - return; - } - - $consumed = $message->consumed; - - list($labels, $consumed) = $this->readLabels($message->data, $consumed); - - if (null === $labels) { - return; - } - - if (strlen($message->data) - $consumed < 10) { - return; - } - - list($type, $class) = array_values(unpack('n*', substr($message->data, $consumed, 4))); - $consumed += 4; - - list($ttl) = array_values(unpack('N', substr($message->data, $consumed, 4))); - $consumed += 4; - - list($rdLength) = array_values(unpack('n', substr($message->data, $consumed, 2))); - $consumed += 2; - - $rdata = null; - - if (Message::TYPE_A === $type || Message::TYPE_AAAA === $type) { - $ip = substr($message->data, $consumed, $rdLength); - $consumed += $rdLength; - - $rdata = inet_ntop($ip); - } - - if (Message::TYPE_CNAME === $type || Message::TYPE_PTR === $type) { - list($bodyLabels, $consumed) = $this->readLabels($message->data, $consumed); - - $rdata = implode('.', $bodyLabels); - } - - $message->consumed = $consumed; - - $name = implode('.', $labels); - $ttl = $this->signedLongToUnsignedLong($ttl); - $record = new Record($name, $type, $class, $ttl, $rdata); - - $message->answers[] = $record; - - if ($message->header->get('anCount') != count($message->answers)) { - return $this->parseAnswer($message); - } - - return $message; - } - - private function readLabels($data, $consumed) - { - $labels = array(); - - while (true) { - if ($this->isEndOfLabels($data, $consumed)) { - $consumed += 1; - break; - } - - if ($this->isCompressedLabel($data, $consumed)) { - list($newLabels, $consumed) = $this->getCompressedLabel($data, $consumed); - $labels = array_merge($labels, $newLabels); - break; - } - - $length = ord(substr($data, $consumed, 1)); - $consumed += 1; - - if (strlen($data) - $consumed < $length) { - return array(null, null); - } - - $labels[] = substr($data, $consumed, $length); - $consumed += $length; - } - - return array($labels, $consumed); - } - - public function isEndOfLabels($data, $consumed) - { - $length = ord(substr($data, $consumed, 1)); - return 0 === $length; - } - - public function getCompressedLabel($data, $consumed) - { - list($nameOffset, $consumed) = $this->getCompressedLabelOffset($data, $consumed); - list($labels) = $this->readLabels($data, $nameOffset); - - return array($labels, $consumed); - } - - public function isCompressedLabel($data, $consumed) - { - $mask = 0xc000; // 1100000000000000 - list($peek) = array_values(unpack('n', substr($data, $consumed, 2))); - - return (bool) ($peek & $mask); - } - - public function getCompressedLabelOffset($data, $consumed) - { - $mask = 0x3fff; // 0011111111111111 - list($peek) = array_values(unpack('n', substr($data, $consumed, 2))); - - return array($peek & $mask, $consumed + 2); - } - - public function signedLongToUnsignedLong($i) - { - return $i & 0x80000000 ? $i - 0xffffffff : $i; - } -} |