160 lines
3.9 KiB
PHP
160 lines
3.9 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 0.6.0
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*
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*/
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/**
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* DHCID Resource Record - RFC4701 section 3.1
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*
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* | ID Type Code |
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* | Digest Type | /
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* +--+--+--+--+--+--+--+--+ /
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* / /
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* / Digest /
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* / /
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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*
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*/
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class Net_DNS2_RR_DHCID extends Net_DNS2_RR
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{
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/*
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* Identifier type
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*/
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public $id_type;
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/*
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* Digest Type
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*/
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public $digest_type;
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/*
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* The digest
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*/
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public $digest;
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/**
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* method to return the rdata portion of the packet as a string
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*
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* @return string
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* @access protected
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*
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*/
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protected function rrToString()
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{
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$out = pack('nC', $this->id_type, $this->digest_type);
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$out .= base64_decode($this->digest);
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return base64_encode($out);
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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 $rdata)
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{
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$data = base64_decode(array_shift($rdata));
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if (strlen($data) > 0) {
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//
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// unpack the id type and digest type
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//
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$x = unpack('nid_type/Cdigest_type', $data);
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$this->id_type = $x['id_type'];
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$this->digest_type = $x['digest_type'];
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//
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// copy out the digest
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//
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$this->digest = base64_encode(substr($data, 3, strlen($data) - 3));
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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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* 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 ($this->rdlength > 0) {
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//
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// unpack the id type and digest type
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//
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$x = unpack('nid_type/Cdigest_type', $this->rdata);
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$this->id_type = $x['id_type'];
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$this->digest_type = $x['digest_type'];
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//
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// copy out the digest
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//
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$this->digest = base64_encode(
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substr($this->rdata, 3, $this->rdlength - 3)
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);
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return true;
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}
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return false;
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}
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/**
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* returns the rdata portion of the DNS packet
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*
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* @param Net_DNS2_Packet &$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->digest) > 0) {
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$data = pack('nC', $this->id_type, $this->digest_type) .
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base64_decode($this->digest);
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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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