270 lines
7.3 KiB
PHP
270 lines
7.3 KiB
PHP
<?php
|
|
/**
|
|
* SimplePie
|
|
*
|
|
* A PHP-Based RSS and Atom Feed Framework.
|
|
* Takes the hard work out of managing a complete RSS/Atom solution.
|
|
*
|
|
* Copyright (c) 2004-2016, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors
|
|
* 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 the SimplePie Team nor the names of its 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 HOLDERS
|
|
* AND 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, STRICT 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.
|
|
*
|
|
* @package SimplePie
|
|
* @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue
|
|
* @author Ryan Parman
|
|
* @author Sam Sneddon
|
|
* @author Ryan McCue
|
|
* @link http://simplepie.org/ SimplePie
|
|
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
|
|
*/
|
|
|
|
|
|
/**
|
|
* Class to validate and to work with IPv6 addresses.
|
|
*
|
|
* @package SimplePie
|
|
* @subpackage HTTP
|
|
* @copyright 2003-2005 The PHP Group
|
|
* @license http://www.opensource.org/licenses/bsd-license.php
|
|
* @link http://pear.php.net/package/Net_IPv6
|
|
* @author Alexander Merz <alexander.merz@web.de>
|
|
* @author elfrink at introweb dot nl
|
|
* @author Josh Peck <jmp at joshpeck dot org>
|
|
* @author Sam Sneddon <geoffers@gmail.com>
|
|
*/
|
|
class SimplePie_Net_IPv6
|
|
{
|
|
/**
|
|
* Uncompresses an IPv6 address
|
|
*
|
|
* RFC 4291 allows you to compress concecutive zero pieces in an address to
|
|
* '::'. This method expects a valid IPv6 address and expands the '::' to
|
|
* the required number of zero pieces.
|
|
*
|
|
* Example: FF01::101 -> FF01:0:0:0:0:0:0:101
|
|
* ::1 -> 0:0:0:0:0:0:0:1
|
|
*
|
|
* @author Alexander Merz <alexander.merz@web.de>
|
|
* @author elfrink at introweb dot nl
|
|
* @author Josh Peck <jmp at joshpeck dot org>
|
|
* @copyright 2003-2005 The PHP Group
|
|
* @license http://www.opensource.org/licenses/bsd-license.php
|
|
* @param string $ip An IPv6 address
|
|
* @return string The uncompressed IPv6 address
|
|
*/
|
|
public static function uncompress($ip)
|
|
{
|
|
$c1 = -1;
|
|
$c2 = -1;
|
|
if (substr_count($ip, '::') === 1)
|
|
{
|
|
list($ip1, $ip2) = explode('::', $ip);
|
|
if ($ip1 === '')
|
|
{
|
|
$c1 = -1;
|
|
}
|
|
else
|
|
{
|
|
$c1 = substr_count($ip1, ':');
|
|
}
|
|
if ($ip2 === '')
|
|
{
|
|
$c2 = -1;
|
|
}
|
|
else
|
|
{
|
|
$c2 = substr_count($ip2, ':');
|
|
}
|
|
if (strpos($ip2, '.') !== false)
|
|
{
|
|
$c2++;
|
|
}
|
|
// ::
|
|
if ($c1 === -1 && $c2 === -1)
|
|
{
|
|
$ip = '0:0:0:0:0:0:0:0';
|
|
}
|
|
// ::xxx
|
|
else if ($c1 === -1)
|
|
{
|
|
$fill = str_repeat('0:', 7 - $c2);
|
|
$ip = str_replace('::', $fill, $ip);
|
|
}
|
|
// xxx::
|
|
else if ($c2 === -1)
|
|
{
|
|
$fill = str_repeat(':0', 7 - $c1);
|
|
$ip = str_replace('::', $fill, $ip);
|
|
}
|
|
// xxx::xxx
|
|
else
|
|
{
|
|
$fill = ':' . str_repeat('0:', 6 - $c2 - $c1);
|
|
$ip = str_replace('::', $fill, $ip);
|
|
}
|
|
}
|
|
return $ip;
|
|
}
|
|
|
|
/**
|
|
* Compresses an IPv6 address
|
|
*
|
|
* RFC 4291 allows you to compress concecutive zero pieces in an address to
|
|
* '::'. This method expects a valid IPv6 address and compresses consecutive
|
|
* zero pieces to '::'.
|
|
*
|
|
* Example: FF01:0:0:0:0:0:0:101 -> FF01::101
|
|
* 0:0:0:0:0:0:0:1 -> ::1
|
|
*
|
|
* @see uncompress()
|
|
* @param string $ip An IPv6 address
|
|
* @return string The compressed IPv6 address
|
|
*/
|
|
public static function compress($ip)
|
|
{
|
|
// Prepare the IP to be compressed
|
|
$ip = self::uncompress($ip);
|
|
$ip_parts = self::split_v6_v4($ip);
|
|
|
|
// Replace all leading zeros
|
|
$ip_parts[0] = preg_replace('/(^|:)0+([0-9])/', '\1\2', $ip_parts[0]);
|
|
|
|
// Find bunches of zeros
|
|
if (preg_match_all('/(?:^|:)(?:0(?::|$))+/', $ip_parts[0], $matches, PREG_OFFSET_CAPTURE))
|
|
{
|
|
$max = 0;
|
|
$pos = null;
|
|
foreach ($matches[0] as $match)
|
|
{
|
|
if (strlen($match[0]) > $max)
|
|
{
|
|
$max = strlen($match[0]);
|
|
$pos = $match[1];
|
|
}
|
|
}
|
|
|
|
$ip_parts[0] = substr_replace($ip_parts[0], '::', $pos, $max);
|
|
}
|
|
|
|
if ($ip_parts[1] !== '')
|
|
{
|
|
return implode(':', $ip_parts);
|
|
}
|
|
|
|
return $ip_parts[0];
|
|
}
|
|
|
|
/**
|
|
* Splits an IPv6 address into the IPv6 and IPv4 representation parts
|
|
*
|
|
* RFC 4291 allows you to represent the last two parts of an IPv6 address
|
|
* using the standard IPv4 representation
|
|
*
|
|
* Example: 0:0:0:0:0:0:13.1.68.3
|
|
* 0:0:0:0:0:FFFF:129.144.52.38
|
|
*
|
|
* @param string $ip An IPv6 address
|
|
* @return array [0] contains the IPv6 represented part, and [1] the IPv4 represented part
|
|
*/
|
|
private static function split_v6_v4($ip)
|
|
{
|
|
if (strpos($ip, '.') !== false)
|
|
{
|
|
$pos = strrpos($ip, ':');
|
|
$ipv6_part = substr($ip, 0, $pos);
|
|
$ipv4_part = substr($ip, $pos + 1);
|
|
return array($ipv6_part, $ipv4_part);
|
|
}
|
|
|
|
return array($ip, '');
|
|
}
|
|
|
|
/**
|
|
* Checks an IPv6 address
|
|
*
|
|
* Checks if the given IP is a valid IPv6 address
|
|
*
|
|
* @param string $ip An IPv6 address
|
|
* @return bool true if $ip is a valid IPv6 address
|
|
*/
|
|
public static function check_ipv6($ip)
|
|
{
|
|
$ip = self::uncompress($ip);
|
|
list($ipv6, $ipv4) = self::split_v6_v4($ip);
|
|
$ipv6 = explode(':', $ipv6);
|
|
$ipv4 = explode('.', $ipv4);
|
|
if (count($ipv6) === 8 && count($ipv4) === 1 || count($ipv6) === 6 && count($ipv4) === 4)
|
|
{
|
|
foreach ($ipv6 as $ipv6_part)
|
|
{
|
|
// The section can't be empty
|
|
if ($ipv6_part === '')
|
|
return false;
|
|
|
|
// Nor can it be over four characters
|
|
if (strlen($ipv6_part) > 4)
|
|
return false;
|
|
|
|
// Remove leading zeros (this is safe because of the above)
|
|
$ipv6_part = ltrim($ipv6_part, '0');
|
|
if ($ipv6_part === '')
|
|
$ipv6_part = '0';
|
|
|
|
// Check the value is valid
|
|
$value = hexdec($ipv6_part);
|
|
if (dechex($value) !== strtolower($ipv6_part) || $value < 0 || $value > 0xFFFF)
|
|
return false;
|
|
}
|
|
if (count($ipv4) === 4)
|
|
{
|
|
foreach ($ipv4 as $ipv4_part)
|
|
{
|
|
$value = (int) $ipv4_part;
|
|
if ((string) $value !== $ipv4_part || $value < 0 || $value > 0xFF)
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Checks if the given IP is a valid IPv6 address
|
|
*
|
|
* @codeCoverageIgnore
|
|
* @deprecated Use {@see SimplePie_Net_IPv6::check_ipv6()} instead
|
|
* @see check_ipv6
|
|
* @param string $ip An IPv6 address
|
|
* @return bool true if $ip is a valid IPv6 address
|
|
*/
|
|
public static function checkIPv6($ip)
|
|
{
|
|
return self::check_ipv6($ip);
|
|
}
|
|
}
|