diff options
Diffstat (limited to 'vendor/simplepie/simplepie/src/Net/IPv6.php')
| -rw-r--r-- | vendor/simplepie/simplepie/src/Net/IPv6.php | 219 |
1 files changed, 210 insertions, 9 deletions
diff --git a/vendor/simplepie/simplepie/src/Net/IPv6.php b/vendor/simplepie/simplepie/src/Net/IPv6.php index 6dee821e0..8f192cbfb 100644 --- a/vendor/simplepie/simplepie/src/Net/IPv6.php +++ b/vendor/simplepie/simplepie/src/Net/IPv6.php @@ -5,10 +5,7 @@ * A PHP-Based RSS and Atom Feed Framework. * Takes the hard work out of managing a complete RSS/Atom solution. * - * Please note: This file is automatically generated by a build script. The - * full original source is always available from http://simplepie.org/ - * - * Copyright (c) 2004-2016, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors + * Copyright (c) 2004-2022, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, are @@ -46,10 +43,214 @@ namespace SimplePie\Net; -class_exists('SimplePie_Net_IPv6'); +/** + * 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 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) { + $ip = '0:0:0:0:0:0:0:0'; + } + // ::xxx + elseif ($c1 === -1) { + $fill = str_repeat('0:', 7 - $c2); + $ip = str_replace('::', $fill, $ip); + } + // xxx:: + elseif ($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); + } -if (\false) { - class IPv6 extends \SimplePie_Net_IPv6 - { - } + 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, $pos + 1); + return [$ipv6_part, $ipv4_part]; + } + + return [$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 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); + } } + +class_alias('SimplePie\Net\IPv6', 'SimplePie_Net_IPv6'); |