184 lines
5.1 KiB
PHP
184 lines
5.1 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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* NAPTR Resource Record - RFC2915
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*
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* | ORDER |
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* | PREFERENCE |
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* / FLAGS /
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* / SERVICES /
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* / REGEXP /
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* / REPLACEMENT /
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* / /
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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*
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*/
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class Net_DNS2_RR_NAPTR extends Net_DNS2_RR
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{
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/*
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* the order in which the NAPTR records MUST be processed
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*/
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public $order;
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/*
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* specifies the order in which NAPTR records with equal "order"
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* values SHOULD be processed
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*/
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public $preference;
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/*
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* rewrite flags
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*/
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public $flags;
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/*
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* Specifies the service(s) available down this rewrite path
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*/
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public $services;
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/*
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* regular expression
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*/
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public $regexp;
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/*
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* The next NAME to query for NAPTR, SRV, or address records
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* depending on the value of the flags field
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*/
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public $replacement;
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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->order . ' ' . $this->preference . ' ' .
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$this->formatString($this->flags) . ' ' .
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$this->formatString($this->services) . ' ' .
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$this->formatString($this->regexp) . ' ' .
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$this->cleanString($this->replacement) . '.';
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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->order = array_shift($rdata);
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$this->preference = array_shift($rdata);
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$data = $this->buildString($rdata);
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if (count($data) == 4) {
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$this->flags = $data[0];
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$this->services = $data[1];
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$this->regexp = $data[2];
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$this->replacement = $this->cleanString($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 ($this->rdlength > 0) {
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//
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// unpack the order and preference
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//
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$x = unpack('norder/npreference', $this->rdata);
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$this->order = $x['order'];
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$this->preference = $x['preference'];
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$offset = $packet->offset + 4;
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$this->flags = Net_DNS2_Names::unpack($packet->rdata, $offset);
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$this->services = Net_DNS2_Names::unpack($packet->rdata, $offset);
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$this->regexp = Net_DNS2_Names::unpack($packet->rdata, $offset);
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$this->replacement = Net_DNS2_Packet::expand($packet, $offset);
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return true;
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}
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return false;
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}
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/**
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* returns the rdata portion of the DNS packet
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*
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* @param Net_DNS2_Packet &$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 &$packet)
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{
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if ( (isset($this->order)) && (strlen($this->services) > 0) ) {
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$data = pack('nn', $this->order, $this->preference);
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$data .= Net_DNS2_Names::pack($this->flags);
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$data .= Net_DNS2_Names::pack($this->services);
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$data .= Net_DNS2_Names::pack($this->regexp);
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$packet->offset += strlen($data);
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$data .= $packet->compress($this->replacement, $packet->offset);
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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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