--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/SimplePie/src/Net/IPv6.php Fri Sep 05 18:52:52 2025 +0200
@@ -0,0 +1,257 @@
+<?php
+
+/**
+ * SimplePie
+ *
+ * A PHP-Based RSS and Atom Feed Framework.
+ * Takes the hard work out of managing a complete RSS/Atom solution.
+ *
+ * Copyright (c) 2004-2022, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * 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
+ */
+
+namespace SimplePie\Net;
+
+/**
+ * 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) {
+ [$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);
+ }
+
+ 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);
+ [$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');