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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: WKS.php 127 2011-12-03 03:29:39Z mike.pultz $
* @link http://pear.php.net/package/Net_DNS2
* @since File available since Release 1.0.1
*
*/
/**
* WKS Resource Record - RFC1035 section 3.4.2
*
* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* | ADDRESS |
* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* | PROTOCOL | |
* +--+--+--+--+--+--+--+--+ |
* | |
* / <BIT MAP> /
* / /
* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
*
* @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_WKS extends Net_DNS2_RR
{
/*
* The IP address of the service
*/
public $address;
/*
* The protocol of the service
*/
public $protocol;
/*
* bitmap
*/
public $bitmap = array();
/**
* method to return the rdata portion of the packet as a string
*
* @return string
* @access protected
*
*/
protected function rrToString()
{
$data = $this->address . ' ' . $this->protocol;
foreach ($this->bitmap as $port) {
$data .= ' ' . $port;
}
return $data;
}
/**
* 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)
{
$this->address = strtolower(trim(array_shift($rdata), '.'));
$this->protocol = array_shift($rdata);
$this->bitmap = $rdata;
return true;
}
/**
* parses the rdata of the Net_DNS2_Packet object
*
* @param Net_DNS2_Packet &$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) {
//
// get the address and protocol value
//
$x = unpack('Naddress/Cprotocol', $this->rdata);
$this->address = long2ip($x['address']);
$this->protocol = $x['protocol'];
//
// unpack the port list bitmap
//
$port = 0;
foreach (unpack('@5/C*', $this->rdata) as $set) {
$s = sprintf('%08b', $set);
for ($i=0; $i<8; $i++, $port++) {
if ($s[$i] == '1') {
$this->bitmap[] = $port;
}
}
}
return true;
}
return false;
}
/**
* returns the rdata portion of the DNS packet
*
* @param Net_DNS2_Packet &$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->address) > 0) {
$data = pack('NC', ip2long($this->address), $this->protocol);
$ports = array();
$n = 0;
foreach ($this->bitmap as $port) {
$ports[$port] = 1;
if ($port > $n) {
$n = $port;
}
}
for ($i=0; $i<ceil($n/8)*8; $i++) {
if (!isset($ports[$i])) {
$ports[$i] = 0;
}
}
ksort($ports);
$string = '';
$n = 0;
foreach ($ports as $s) {
$string .= $s;
$n++;
if ($n == 8) {
$data .= chr(bindec($string));
$string = '';
$n = 0;
}
}
return $data;
}
return null;
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* c-hanging-comment-ender-p: nil
* End:
*/
?>
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