156 lines
3.7 KiB
PHP
156 lines
3.7 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 1.4.1
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*
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*/
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/**
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* CSYNC Resource Record - RFC 7477 seciond 2.1.1
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*
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* | SOA Serial |
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* | |
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* | Flags |
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* / Type Bit Map /
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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*
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*/
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class Net_DNS2_RR_CSYNC extends Net_DNS2_RR
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{
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/*
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* serial number
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*/
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public $serial;
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/*
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* flags
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*/
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public $flags;
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/*
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* array of RR type names
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*/
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public $type_bit_maps = [];
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/**
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* method to return the rdata portion of the packet as a string
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*
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* @return string
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* @access protected
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*
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*/
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protected function rrToString()
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{
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$out = $this->serial . ' ' . $this->flags;
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//
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// show the RR's
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//
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foreach ($this->type_bit_maps as $rr) {
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$out .= ' ' . strtoupper($rr);
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}
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return $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 $rdata)
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{
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$this->serial = array_shift($rdata);
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$this->flags = array_shift($rdata);
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$this->type_bit_maps = $rdata;
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return true;
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}
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/**
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* parses the rdata of the Net_DNS2_Packet object
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*
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* @param Net_DNS2_Packet &$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 serial and flags values
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//
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$x = unpack('@' . $packet->offset . '/Nserial/nflags', $packet->rdata);
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$this->serial = Net_DNS2::expandUint32($x['serial']);
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$this->flags = $x['flags'];
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//
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// parse out the RR bitmap
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//
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$this->type_bit_maps = Net_DNS2_BitMap::bitMapToArray(
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substr($this->rdata, 6)
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);
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return true;
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}
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return false;
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}
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/**
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* returns the rdata portion of the DNS packet
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*
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* @param Net_DNS2_Packet &$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 &$packet)
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{
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//
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// pack the serial and flags values
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//
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$data = pack('Nn', $this->serial, $this->flags);
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//
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// convert the array of RR names to a type bitmap
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//
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$data .= Net_DNS2_BitMap::arrayToBitMap($this->type_bit_maps);
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//
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// advance the offset
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//
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$packet->offset += strlen($data);
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return $data;
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}
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}
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