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Edit File : IPv6.php \| Size : 7.40 KB
<?php /** * SimplePie * * A PHP-Based RSS and Atom Feed Framework. * Takes the hard work out of managing a complete RSS/Atom solution. * * Copyright (c) 2004-2012, Ryan Parman, Geoffrey 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 * @version 1.3.1 * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue * @author Ryan Parman * @author Geoffrey 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 Geoffrey 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); } else { 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, $ipv4_part); } else { return array($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; } else { 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); } } Back

Edit File : IPv6.php | Size : 7.40 KB

<?php
/**
 * SimplePie
 *
 * A PHP-Based RSS and Atom Feed Framework.
 * Takes the hard work out of managing a complete RSS/Atom solution.
 *
 * Copyright (c) 2004-2012, Ryan Parman, Geoffrey 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
 * @version 1.3.1
 * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue
 * @author Ryan Parman
 * @author Geoffrey 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 Geoffrey 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);
		}
		else
		{
			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, $ipv4_part);
		}
		else
		{
			return array($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;
		}
		else
		{
			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);
	}
}

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