140 lines
3.5 KiB
PHP
140 lines
3.5 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 1.3.1
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*
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*/
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/**
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* NID Resource Record - RFC6742 section 2.1
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*
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Preference | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +
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* | NodeID |
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* + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
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*/
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class Net_DNS2_RR_NID extends Net_DNS2_RR
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{
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/*
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* The preference
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*/
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public $preference;
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/*
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* The node ID field
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*/
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public $nodeid;
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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->preference . ' ' . $this->nodeid;
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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->preference = array_shift($rdata);
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$this->nodeid = array_shift($rdata);
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return true;
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}
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/**
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* parses the rdata of the Net_DNS2_Packet object
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*
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* @param Net_DNS2_Packet &$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 values
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//
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$x = unpack('npreference/n4nodeid', $this->rdata);
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$this->preference = $x['preference'];
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//
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// build the node id
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//
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$this->nodeid = dechex($x['nodeid1']) . ':' .
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dechex($x['nodeid2']) . ':' .
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dechex($x['nodeid3']) . ':' .
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dechex($x['nodeid4']);
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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($this->nodeid) > 0) {
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//
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// break out the node id
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//
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$n = explode(':', $this->nodeid);
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//
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// pack the data
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//
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return pack(
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'n5', $this->preference, hexdec($n[0]), hexdec($n[1]),
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hexdec($n[2]), hexdec($n[3])
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);
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}
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return null;
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}
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}
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