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<?php /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/** * DNS Library for handling lookups and updates. * * PHP Version 5 * * Copyright (c) 2010, Mike Pultz <mike@mikepultz.com>. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * * Neither the name of Mike Pultz nor the names of his contributors * may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRIC * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * @category Networking * @package Net_DNS2 * @author Mike Pultz <mike@mikepultz.com> * @copyright 2010 Mike Pultz <mike@mikepultz.com> * @license http://www.opensource.org/licenses/bsd-license.php BSD License * @version SVN: $Id: OPT.php 127 2011-12-03 03:29:39Z mike.pultz $ * @link http://pear.php.net/package/Net_DNS2 * @since File available since Release 1.0.0 * */
/** * OPT Resource Record - RFC2929 section 3.1 * * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+ * | OPTION-CODE | * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+ * | OPTION-LENGTH | * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+ * | | * / OPTION-DATA / * / / * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+ * * @category Networking * @package Net_DNS2 * @author Mike Pultz <mike@mikepultz.com> * @license http://www.opensource.org/licenses/bsd-license.php BSD License * @link http://pear.php.net/package/Net_DNS2 * @see Net_DNS2_RR * */ class Net_DNS2_RR_OPT extends Net_DNS2_RR { /* * option code - assigned by IANA */ public $option_code;
/* * the length of the option data */ public $option_length;
/* * the option data */ public $option_data;
/* * the extended response code stored in the TTL */ public $extended_rcode;
/* * the implementation level */ public $version;
/* * the extended flags */ public $z;
/** * method to return the rdata portion of the packet as a string. There is no * defintion for returning an OPT RR by string- this is just here to validate * the binary parsing / building routines. * * @return string * @access protected * */ protected function rrToString() { return $this->option_code . ' ' . $this->option_data; }
/** * parses the rdata portion from a standard DNS config line. There is no * definition for parsing a OPT RR by string- this is just here to validate * the binary parsing / building routines. * * @param array $rdata a string split line of values for the rdata * * @return boolean * @access protected * */ protected function rrFromString(array $rdata) { $this->option_code = array_shift($rdata); $this->option_data = array_shift($rdata); $this->option_length = strlen($this->option_data);
$x = unpack('Cextended/Cversion/nz', pack('N', $this->ttl));
$this->extended_rcode = $x['extended']; $this->version = $x['version']; $this->z = $x['z'];
return true; }
/** * parses the rdata of the Net_DNS2_Packet object * * @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet to parse the RR from * * @return boolean * @access protected * */ protected function rrSet(Net_DNS2_Packet &$packet) { if ($this->rdlength > 0) {
// // unpack the code and length // $x = unpack('noption_code/noption_length', $this->rdata);
$this->option_code = $x['option_code']; $this->option_length = $x['option_length'];
// // copy out the data based on the length // $this->option_data = substr($this->rdata, 4);
// // parse out the TTL value // $ttl = pack('N', $this->ttl);
$x = unpack('Cextended/Cversion/nz', $ttl);
$this->extended_rcode = $x['extended']; $this->version = $x['version']; $this->z = $x['z'];
return true; }
return false; }
/** * returns the rdata portion of the DNS packet * * @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet use for * compressed names * * @return mixed either returns a binary packed * string or null on failure * @access protected * */ protected function rrGet(Net_DNS2_Packet &$packet) { if ($this->option_code) {
$ttl = unpack( 'N', pack('CCn', $this->extended_rcode, $this->version, $this->z) ); $this->ttl = $ttl[1];
return pack('nn', $this->option_code, $this->option_length) . $this->option_data; }
return null; } }
/* * Local variables: * tab-width: 4 * c-basic-offset: 4 * c-hanging-comment-ender-p: nil * End: */ ?>
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