139 lines
3.4 KiB
PHP
139 lines
3.4 KiB
PHP
<?php
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/**
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* DNS Library for handling lookups and updates.
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*
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* Copyright (c) 2020, Mike Pultz <mike@mikepultz.com>. All rights reserved.
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*
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* See LICENSE for more details.
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*
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* @category Networking
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* @package Net_DNS2
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* @author Mike Pultz <mike@mikepultz.com>
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* @copyright 2020 Mike Pultz <mike@mikepultz.com>
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License
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* @link https://netdns2.com/
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* @since File available since Release 1.2.0
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*
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*/
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/**
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* CAA Resource Record - http://tools.ietf.org/html/draft-ietf-pkix-caa-03
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*
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* | FLAGS | TAG LENGTH |
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* / TAG /
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* / DATA /
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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*
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*/
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class Net_DNS2_RR_CAA extends Net_DNS2_RR
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{
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/*
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* The critcal flag
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*/
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public $flags;
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/*
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* The property identifier
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*/
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public $tag;
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/*
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* The property value
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*/
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public $value;
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/**
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* method to return the rdata portion of the packet as a string
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*
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* @return string
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* @access protected
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*
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*/
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protected function rrToString()
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{
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return $this->flags . ' ' . $this->tag . ' "' .
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trim($this->cleanString($this->value), '"') . '"';
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}
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/**
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* parses the rdata portion from a standard DNS config line
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*
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* @param array $rdata a string split line of values for the rdata
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*
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* @return boolean
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* @access protected
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*
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*/
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protected function rrFromString(array $rdata)
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{
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$this->flags = array_shift($rdata);
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$this->tag = array_shift($rdata);
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$this->value = trim($this->cleanString(implode(' ', $rdata)), '"');
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return true;
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}
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/**
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* parses the rdata of the Net_DNS2_Packet object
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*
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* @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet to parse the RR from
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*
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* @return boolean
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* @access protected
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*
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*/
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protected function rrSet(Net_DNS2_Packet &$packet)
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{
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if ($this->rdlength > 0) {
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//
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// unpack the flags and tag length
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//
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$x = unpack('Cflags/Ctag_length', $this->rdata);
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$this->flags = $x['flags'];
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$offset = 2;
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$this->tag = substr($this->rdata, $offset, $x['tag_length']);
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$offset += $x['tag_length'];
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$this->value = substr($this->rdata, $offset);
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return true;
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}
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return false;
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}
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/**
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* returns the rdata portion of the DNS packet
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*
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* @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet use for
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* compressed names
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*
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* @return mixed either returns a binary packed
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* string or null on failure
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* @access protected
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*
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*/
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protected function rrGet(Net_DNS2_Packet &$packet)
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{
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if (strlen($this->value) > 0) {
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$data = chr($this->flags);
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$data .= chr(strlen($this->tag)) . $this->tag . $this->value;
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$packet->offset += strlen($data);
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return $data;
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}
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return null;
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}
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}
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