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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) 2011, 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 2011 Mike Pultz <mike@mikepultz.com>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version SVN: $Id: CAA.php 132 2011-12-03 05:28:54Z mike.pultz $
* @link http://pear.php.net/package/Net_DNS2
* @since File available since Release 1.2.0
*
*/
/**
* CAA Resource Record - http://tools.ietf.org/html/draft-ietf-pkix-caa-03
*
* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* | FLAGS | TAG LENGTH |
* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* / TAG /
* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* / 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_CAA extends Net_DNS2_RR
{
/*
* The critcal flag
*/
public $flags;
/*
* The property identifier
*/
public $tag;
/*
* The property value
*/
public $value;
/**
* method to return the rdata portion of the packet as a string
*
* @return string
* @access protected
*
*/
protected function rrToString()
{
return $this->flags . ' ' . $this->tag . ' "' .
trim($this->cleanString($this->value), '"') . '"';
}
/**
* parses the rdata portion from a standard DNS config line
*
* @param array $rdata a string split line of values for the rdata
*
* @return boolean
* @access protected
*
*/
protected function rrFromString(array $rdata)
{
$this->flags = array_shift($rdata);
$this->tag = array_shift($rdata);
$this->value = trim($this->cleanString(implode($rdata, ' ')), '"');
return true;
}
/**
* parses the rdata of the Net_DNS2_Packet object
*
* @param Net_DNS2_Packet &$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 flags and tag length
//
$x = unpack('Cflags/Ctag_length', $this->rdata);
$this->flags = $x['flags'];
$offset = 2;
$this->tag = substr($this->rdata, $offset, $x['tag_length']);
$offset += $x['tag_length'];
$this->value = substr($this->rdata, $offset);
return true;
}
return false;
}
/**
* returns the rdata portion of the DNS packet
*
* @param Net_DNS2_Packet &$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 &$packet)
{
if (strlen($this->value) > 0) {
$data = chr($this->flags);
$data .= chr(strlen($this->tag)) . $this->tag . $this->value;
return $data;
}
return null;
}
}
?>
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