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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: Request.php 124 2011-12-02 23:23:15Z mike.pultz $
* @link http://pear.php.net/package/Net_DNS2
* @since File available since Release 0.6.0
*
*/
/**
* This class handles building new DNS request packets; packets used for DNS
* queries and updates.
*
* @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_Packet
*
*/
class Net_DNS2_Packet_Request extends Net_DNS2_Packet
{
/**
* Constructor - builds a new Net_DNS2_Packet_Request object
*
* @param string $name the domain name for the packet
* @param string $type the DNS RR type for the packet
* @param string $class the DNS class for the packet
*
* @throws Net_DNS2_Exception
* @access public
*
*/
public function __construct($name, $type = null, $class = null)
{
$this->set($name, $type, $class);
}
/**
* builds a new Net_DNS2_Packet_Request object
*
* @param string $name the domain name for the packet
* @param string $type the DNS RR type for the packet
* @param string $class the DNS class for the packet
*
* @return boolean
* @throws Net_DNS2_Exception
* @access public
*
*/
public function set($name, $type = 'A', $class = 'IN')
{
//
// generate a new header
//
$this->header = new Net_DNS2_Header;
//
// add a new question
//
$q = new Net_DNS2_Question();
$name = trim(strtolower($name), " \t\n\r\0\x0B.");
$type = strtoupper(trim($type));
$class = strtoupper(trim($class));
//
// check that the input string has some data in it
//
if (empty($name)) {
throw new Net_DNS2_Exception(
'empty query string provided',
Net_DNS2_Lookups::E_PACKET_INVALID
);
}
//
// if the type is "*", rename it to "ANY"- both are acceptable.
//
if ($type == '*') {
$type = 'ANY';
}
//
// check that the type and class are valid
//
if ( (!isset(Net_DNS2_Lookups::$rr_types_by_name[$type]))
|| (!isset(Net_DNS2_Lookups::$classes_by_name[$class]))
) {
throw new Net_DNS2_Exception(
'invalid type (' . $type . ') or class (' . $class . ') specified.',
Net_DNS2_Lookups::E_PACKET_INVALID
);
}
//
// if it's a PTR request for an IP address, then make sure we tack on
// the arpa domain
//
if ($type == 'PTR') {
if (Net_DNS2::isIPv4($name) == true) {
//
// IPv4
//
$name = implode('.', array_reverse(explode('.', $name)));
$name .= '.in-addr.arpa';
} else if (Net_DNS2::isIPv6($name) == true) {
//
// IPv6
//
$e = Net_DNS2::expandIPv6($name);
if ($e !== false) {
$name = implode(
'.', array_reverse(str_split(str_replace(':', '', $e)))
);
$name .= '.ip6.arpa';
} else {
throw new Net_DNS2_Exception(
'unsupported PTR value: ' . $name,
Net_DNS2_Lookup::E_PACKET_INVALID
);
}
} else if (preg_match('/arpa$/', $name) == true) {
//
// an already formatted IPv4 or IPv6 address in the arpa domain
//
} else {
throw new Net_DNS2_Exception(
'unsupported PTR value: ' . $name,
Net_DNS2_Lookup::E_PACKET_INVALID
);
}
}
//
// store the data
//
$q->qname = $name;
$q->qtype = $type;
$q->qclass = $class;
$this->question[] = $q;
//
// the answer, authority and additional are empty; they can be modified
// after the request is created for UPDATE requests if needed.
//
$this->answer = array();
$this->authority = array();
$this->additional = array();
return true;
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* c-hanging-comment-ender-p: nil
* End:
*/
?>
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