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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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* DNS Library for handling lookups and updates.
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* Copyright (c) 2011, Mike Pultz <mike@mikepultz.com>.
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* All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* * Neither the name of Mike Pultz nor the names of his contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRIC
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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* @category Networking
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* @author Mike Pultz <mike@mikepultz.com>
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* @copyright 2011 Mike Pultz <mike@mikepultz.com>
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License
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* @version SVN: $Id: CAA.php 179 2012-11-23 05:49:01Z mike.pultz $
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* @link http://pear.php.net/package/Net_DNS2
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* @since File available since Release 1.2.0
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* CAA Resource Record - http://tools.ietf.org/html/draft-ietf-pkix-caa-03
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* | FLAGS | TAG LENGTH |
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* @category Networking
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* @author 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 http://pear.php.net/package/Net_DNS2
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class Net_DNS2_RR_CAA extends Net_DNS2_RR
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* The property identifier
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* method to return the rdata portion of the packet as a string
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protected function rrToString()
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return $this->flags . ' ' . $this->tag . ' "' .
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trim($this->cleanString($this->value), '"') . '"';
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* parses the rdata portion from a standard DNS config line
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* @param array $rdata a string split line of values for the rdata
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protected function rrFromString(array $rdata)
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$this->flags = array_shift($rdata);
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$this->tag = array_shift($rdata);
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$this->value = trim($this->cleanString(implode($rdata, ' ')), '"');
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* parses the rdata of the Net_DNS2_Packet object
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* @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet to parse the RR from
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protected function rrSet(Net_DNS2_Packet &$packet)
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if ($this->rdlength > 0) {
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// unpack the flags and tag length
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$x = unpack('Cflags/Ctag_length', $this->rdata);
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$this->flags = $x['flags'];
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$this->tag = substr($this->rdata, $offset, $x['tag_length']);
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$offset += $x['tag_length'];
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$this->value = substr($this->rdata, $offset);
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* returns the rdata portion of the DNS packet
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* @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet use for
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* @return mixed either returns a binary packed
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* string or null on failure
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protected function rrGet(Net_DNS2_Packet &$packet)
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if (strlen($this->value) > 0) {
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$data = chr($this->flags);
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$data .= chr(strlen($this->tag)) . $this->tag . $this->value;
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$packet->offset += strlen($data);