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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: NSAP.php 125 2011-12-03 00:19:49Z mike.pultz $
* @link http://pear.php.net/package/Net_DNS2
* @since File available since Release 0.6.0
*
*/
/**
* NSAP Resource Record - RFC1706
*
* |--------------|
* | <-- IDP --> |
* |--------------|-------------------------------------|
* | AFI | IDI | <-- DSP --> |
* |-----|--------|-------------------------------------|
* | 47 | 0005 | DFI | AA |Rsvd | RD |Area | ID |Sel |
* |-----|--------|-----|----|-----|----|-----|----|----|
* octets | 1 | 2 | 1 | 3 | 2 | 2 | 2 | 6 | 1 |
* |-----|--------|-----|----|-----|----|-----|----|----|
*
* @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_NSAP extends Net_DNS2_RR
{
public $afi;
public $idi;
public $dfi;
public $aa;
public $rsvd;
public $rd;
public $area;
public $id;
public $sel;
/**
* method to return the rdata portion of the packet as a string
*
* @return string
* @access protected
*
*/
protected function rrToString()
{
return $this->cleanString($this->afi) . '.' .
$this->cleanString($this->idi) . '.' .
$this->cleanString($this->dfi) . '.' .
$this->cleanString($this->aa) . '.' .
$this->cleanString($this->rsvd) . '.' .
$this->cleanString($this->rd) . '.' .
$this->cleanString($this->area) . '.' .
$this->cleanString($this->id) . '.' .
$this->sel;
}
/**
* 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)
{
$data = strtolower(trim(array_shift($rdata)));
//
// there is no real standard for format, so we can't rely on the fact that
// the value will come in with periods separating the values- so strip
// them out if they're included, and parse without them.
//
$data = str_replace(array('.', '0x'), '', $data);
//
// unpack it as ascii characters
//
$x = unpack('A2afi/A4idi/A2dfi/A6aa/A4rsvd/A4rd/A4area/A12id/A2sel', $data);
//
// make sure the afi value is 47
//
if ($x['afi'] == 47) {
$this->afi = '0x' . $x['afi'];
$this->idi = $x['idi'];
$this->dfi = $x['dfi'];
$this->aa = $x['aa'];
$this->rsvd = $x['rsvd'];
$this->rd = $x['rd'];
$this->area = $x['area'];
$this->id = $x['id'];
$this->sel = $x['sel'];
return true;
}
return false;
}
/**
* parses the rdata of the Net_DNS2_Packet object
*
* @param Net_DNS2_Packet &$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 == 20) {
//
// get the AFI value
//
$this->afi = dechex(ord($this->rdata[0]));
//
// we only support AFI 47- there arent' any others defined.
//
if ($this->afi == 47) {
//
// unpack the rest of the values
//
$x = unpack(
'Cafi/nidi/Cdfi/C3aa/nrsvd/nrd/narea/Nidh/nidl/Csel',
$this->rdata
);
$this->afi = sprintf('0x%02x', $x['afi']);
$this->idi = sprintf('%04x', $x['idi']);
$this->dfi = sprintf('%02x', $x['dfi']);
$this->aa = sprintf(
'%06x', $x['aa1'] << 16 | $x['aa2'] << 8 | $x['aa3']
);
$this->rsvd = sprintf('%04x', $x['rsvd']);
$this->rd = sprintf('%04x', $x['rd']);
$this->area = sprintf('%04x', $x['area']);
$this->id = sprintf('%08x', $x['idh']) .
sprintf('%04x', $x['idl']);
$this->sel = sprintf('%02x', $x['sel']);
return true;
}
}
return false;
}
/**
* returns the rdata portion of the DNS packet
*
* @param Net_DNS2_Packet &$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->afi == 0x47) {
//
// build the aa field
//
$aa = unpack('A2x/A2y/A2z', $this->aa);
//
// build the id field
//
$id = unpack('A8a/A4b', $this->id);
//
$out = pack(
'CnCCCCnnnNnC',
hexdec($this->afi),
hexdec($this->idi),
hexdec($this->dfi),
hexdec($aa['x']),
hexdec($aa['y']),
hexdec($aa['z']),
hexdec($this->rsvd),
hexdec($this->rd),
hexdec($this->area),
hexdec($id['a']),
hexdec($id['b']),
hexdec($this->sel)
);
if (strlen($out) == 20) {
return $out;
}
}
return null;
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* c-hanging-comment-ender-p: nil
* End:
*/
?>
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