Sebastian Nohn
141 lines
4.6 KiB
PHP
141 lines
4.6 KiB
PHP
<?php
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/*
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* License Information:
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*
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* Net_DNS: A resolver library for PHP
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* Copyright (c) 2002-2003 Eric Kilfoil eric@ypass.net
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* Net_DNS_RR_AAAA object definition {{{ */
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/**
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* A representation of a resource record of type <b>AAAA</b>
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*
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* @package Net_DNS
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*/
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class Net_DNS_RR_AAAA extends Net_DNS_RR
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{
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/* class variable definitions {{{ */
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var $name;
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var $type;
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var $class;
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var $ttl;
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var $rdlength;
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var $rdata;
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var $address;
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/* }}} */
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/* class constructor - Net_DNS_RR_AAAA(&$rro, $data, $offset = '') {{{ */
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function Net_DNS_RR_AAAA(&$rro, $data, $offset = '')
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{
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$this->name = $rro->name;
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$this->type = $rro->type;
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$this->class = $rro->class;
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$this->ttl = $rro->ttl;
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$this->rdlength = $rro->rdlength;
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$this->rdata = $rro->rdata;
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if ($offset) {
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$this->address = Net_DNS_RR_AAAA::ipv6_decompress(substr($this->rdata, 0, $this->rdlength));
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} else {
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if (strlen($data)) {
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if (count($adata = explode(':', $data, 8)) >= 3) {
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foreach($adata as $addr)
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if (!preg_match('/^[0-9A-F]{0,4}$/i', $addr)) return;
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$this->address = trim($data);
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}
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}
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}
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}
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/* }}} */
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/* Net_DNS_RR_AAAA::rdatastr() {{{ */
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function rdatastr()
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{
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if (strlen($this->address)) {
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return $this->address;
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}
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return '; no data';
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}
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/* }}} */
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/* Net_DNS_RR_AAAA::rr_rdata($packet, $offset) {{{ */
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function rr_rdata($packet, $offset)
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{
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return Net_DNS_RR_AAAA::ipv6_compress($this->address);
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}
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/* }}} */
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/* Net_DNS_RR_AAAA::ipv6_compress($addr) {{{ */
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function ipv6_compress($addr)
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{
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$numparts = count(explode(':', $addr));
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if ($numparts < 3 || $numparts > 8 ||
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!preg_match('/^([0-9A-F]{0,4}:){0,7}(:[0-9A-F]{0,4}){0,7}$/i', $addr)) {
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/* Non-sensical IPv6 address */
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return pack('n8', 0, 0, 0, 0, 0, 0, 0, 0);
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}
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if (strpos($addr, '::') !== false) {
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/* First we have to normalize the address, turn :: into :0:0:0:0: */
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$filler = str_repeat(':0', 9 - $numparts) . ':';
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if (substr($addr, 0, 2) == '::') {
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$filler = "0$filler";
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}
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if (substr($addr, -2, 2) == '::') {
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$filler .= '0';
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}
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$addr = str_replace('::', $filler, $addr);
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}
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$aparts = explode(':', $addr);
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return pack('n8', hexdec($aparts[0]), hexdec($aparts[1]), hexdec($aparts[2]), hexdec($aparts[3]),
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hexdec($aparts[4]), hexdec($aparts[5]), hexdec($aparts[6]), hexdec($aparts[7]));
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}
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/* }}} */
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/* Net_DNS_RR_AAAA::ipv6_decompress($pack) {{{ */
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function ipv6_decompress($pack)
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{
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if (strlen($pack) != 16) {
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/* Must be 8 shorts long */
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return '::';
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}
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$a = unpack('n8', $pack);
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$addr = vsprintf("%x:%x:%x:%x:%x:%x:%x:%x", $a);
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/* Shorthand the first :0:0: set into a :: */
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/* TODO: Make this is a single replacement pattern */
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if (substr($addr, -4) == ':0:0') {
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return preg_replace('/((:0){2,})$/', '::', $addr);
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} elseif (substr($addr, 0, 4) == '0:0:') {
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return '0:0:'. substr($addr, 4);
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} else {
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return preg_replace('/(:(0:){2,})/', '::', $addr);
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}
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}
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/* }}} */
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}
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/* }}} */
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/* VIM settings {{{
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* soft-stop-width: 4
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* c indent on
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* End:
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* vim600: sw=4 ts=4 sts=4 cindent fdm=marker et
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* vim<600: sw=4 ts=4
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* }}} */
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?>
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