Merged in feature/280-dev-dev01 (pull request #21)
auto-patch 280-dev-dev01-2024-01-19T16_41_58 * auto-patch 280-dev-dev01-2024-01-19T16_41_58
This commit is contained in:
Tony Volpe
277
wp/wp-content/plugins/ip-geo-block/includes/Net/DNS2/Header.php
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277
wp/wp-content/plugins/ip-geo-block/includes/Net/DNS2/Header.php
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<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* DNS Library for handling lookups and updates.
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*
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* PHP Version 5
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*
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* Copyright (c) 2010, Mike Pultz <mike@mikepultz.com>.
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* All rights reserved.
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*
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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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* are met:
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*
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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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*
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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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* distribution.
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*
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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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*
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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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*
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* @category Networking
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* @package Net_DNS2
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* @author Mike Pultz <mike@mikepultz.com>
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* @copyright 2010 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: $Id$
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* @link http://pear.php.net/package/Net_DNS2
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* @since File available since Release 0.6.0
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*
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*/
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/**
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* DNS Packet Header class
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*
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* This class handles parsing and constructing DNS Packet Headers as defined
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* by section 4.1.1 of RFC1035.
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*
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* DNS header format - RFC1035 section 4.1.1
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* DNS header format - RFC4035 section 3.2
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*
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* | ID |
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* |QR| Opcode |AA|TC|RD|RA| Z|AD|CD| RCODE |
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* | QDCOUNT |
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* | ANCOUNT |
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* | NSCOUNT |
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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* | ARCOUNT |
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* +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
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*
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* @category Networking
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* @package Net_DNS2
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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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*
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*/
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class Net_DNS2_Header
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{
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public $id; // 16 bit - identifier
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public $qr; // 1 bit - 0 = query, 1 = response
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public $opcode; // 4 bit - op code
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public $aa; // 1 bit - Authoritative Answer
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public $tc; // 1 bit - TrunCation
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public $rd; // 1 bit - Recursion Desired
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public $ra; // 1 bit - Recursion Available
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public $z; // 1 bit - Reserved
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public $ad; // 1 bit - Authentic Data (RFC4035)
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public $cd; // 1 bit - Checking Disabled (RFC4035)
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public $rcode; // 4 bit - Response code
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public $qdcount; // 16 bit - entries in the question section
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public $ancount; // 16 bit - resource records in the answer section
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public $nscount; // 16 bit - name server rr in the authority records section
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public $arcount; // 16 bit - rr's in the additional records section
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/**
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* Constructor - builds a new Net_DNS2_Header object
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*
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* @param mixed &$packet either a Net_DNS2_Packet object or null
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*
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* @throws Net_DNS2_Exception
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* @access public
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*
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*/
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public function __construct(Net_DNS2_Packet &$packet = null)
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{
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if (!is_null($packet)) {
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$this->set($packet);
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} else {
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$this->id = $this->nextPacketId();
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$this->qr = Net_DNS2_Lookups::QR_QUERY;
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$this->opcode = Net_DNS2_Lookups::OPCODE_QUERY;
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$this->aa = 0;
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$this->tc = 0;
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$this->rd = 1;
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$this->ra = 0;
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$this->z = 0;
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$this->ad = 0;
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$this->cd = 0;
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$this->rcode = Net_DNS2_Lookups::RCODE_NOERROR;
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$this->qdcount = 1;
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$this->ancount = 0;
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$this->nscount = 0;
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$this->arcount = 0;
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}
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}
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/**
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* returns the next available packet id
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*
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* @return integer
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* @access public
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*
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*/
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public function nextPacketId()
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{
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if (++Net_DNS2_Lookups::$next_packet_id > 65535) {
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Net_DNS2_Lookups::$next_packet_id = 1;
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}
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return Net_DNS2_Lookups::$next_packet_id;
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}
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/**
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* magic __toString() method to return the header as a string
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*
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* @return string
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* @access public
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*
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*/
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public function __toString()
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{
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$output = ";;\n;; Header:\n";
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$output .= ";;\t id = " . $this->id . "\n";
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$output .= ";;\t qr = " . $this->qr . "\n";
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$output .= ";;\t opcode = " . $this->opcode . "\n";
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$output .= ";;\t aa = " . $this->aa . "\n";
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$output .= ";;\t tc = " . $this->tc . "\n";
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$output .= ";;\t rd = " . $this->rd . "\n";
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$output .= ";;\t ra = " . $this->ra . "\n";
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$output .= ";;\t z = " . $this->z . "\n";
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$output .= ";;\t ad = " . $this->ad . "\n";
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$output .= ";;\t cd = " . $this->cd . "\n";
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$output .= ";;\t rcode = " . $this->rcode . "\n";
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$output .= ";;\t qdcount = " . $this->qdcount . "\n";
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$output .= ";;\t ancount = " . $this->ancount . "\n";
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$output .= ";;\t nscount = " . $this->nscount . "\n";
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$output .= ";;\t arcount = " . $this->arcount . "\n";
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return $output;
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}
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/**
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* constructs a Net_DNS2_Header from a Net_DNS2_Packet object
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*
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* @param Net_DNS2_Packet &$packet Object
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*
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* @return boolean
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* @throws Net_DNS2_Exception
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* @access public
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*
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*/
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public function set(Net_DNS2_Packet &$packet)
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{
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//
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// the header must be at least 12 bytes long.
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//
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if ($packet->rdlength < Net_DNS2_Lookups::DNS_HEADER_SIZE) {
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throw new Net_DNS2_Exception(
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'invalid header data provided; to small',
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Net_DNS2_Lookups::E_HEADER_INVALID
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);
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}
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$offset = 0;
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//
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// parse the values
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//
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$this->id = ord($packet->rdata[$offset]) << 8 |
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ord($packet->rdata[++$offset]);
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++$offset;
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$this->qr = (ord($packet->rdata[$offset]) >> 7) & 0x1;
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$this->opcode = (ord($packet->rdata[$offset]) >> 3) & 0xf;
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$this->aa = (ord($packet->rdata[$offset]) >> 2) & 0x1;
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$this->tc = (ord($packet->rdata[$offset]) >> 1) & 0x1;
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$this->rd = ord($packet->rdata[$offset]) & 0x1;
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++$offset;
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$this->ra = (ord($packet->rdata[$offset]) >> 7) & 0x1;
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$this->z = (ord($packet->rdata[$offset]) >> 6) & 0x1;
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$this->ad = (ord($packet->rdata[$offset]) >> 5) & 0x1;
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$this->cd = (ord($packet->rdata[$offset]) >> 4) & 0x1;
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$this->rcode = ord($packet->rdata[$offset]) & 0xf;
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$this->qdcount = ord($packet->rdata[++$offset]) << 8 |
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ord($packet->rdata[++$offset]);
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$this->ancount = ord($packet->rdata[++$offset]) << 8 |
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ord($packet->rdata[++$offset]);
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$this->nscount = ord($packet->rdata[++$offset]) << 8 |
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ord($packet->rdata[++$offset]);
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$this->arcount = ord($packet->rdata[++$offset]) << 8 |
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ord($packet->rdata[++$offset]);
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//
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// increment the internal offset
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//
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$packet->offset += Net_DNS2_Lookups::DNS_HEADER_SIZE;
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return true;
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}
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/**
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* returns a binary packed DNS Header
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*
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* @param Net_DNS2_Packet &$packet Object
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*
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* @return string
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* @access public
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*
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*/
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public function get(Net_DNS2_Packet &$packet)
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{
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$packet->offset += Net_DNS2_Lookups::DNS_HEADER_SIZE;
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return pack('n', $this->id) .
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chr(
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($this->qr << 7) | ($this->opcode << 3) |
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($this->aa << 2) | ($this->tc << 1) | ($this->rd)
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) .
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chr(
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($this->ra << 7) | ($this->ad << 5) | ($this->cd << 4) | $this->rcode
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) .
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pack('n4', $this->qdcount, $this->ancount, $this->nscount, $this->arcount);
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}
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}
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* c-hanging-comment-ender-p: nil
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* End:
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*/
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?>
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