Auth
5 months ago
Cookie
5 months ago
Exception
5 months ago
Proxy
5 months ago
Response
5 months ago
Transport
5 months ago
Utility
5 months ago
Auth.php
5 months ago
Autoload.php
5 months ago
Capability.php
5 months ago
Cookie.php
5 months ago
Exception.php
5 months ago
HookManager.php
5 months ago
Hooks.php
5 months ago
IdnaEncoder.php
5 months ago
Ipv6.php
5 months ago
Iri.php
5 months ago
Port.php
5 months ago
Proxy.php
5 months ago
Requests.php
5 months ago
Response.php
5 months ago
Session.php
5 months ago
Ssl.php
5 months ago
Transport.php
5 months ago
Ipv6.php
204 lines
| 1 | <?php |
| 2 | /** |
| 3 | * Class to validate and to work with IPv6 addresses |
| 4 | * |
| 5 | * @package Requests\Utilities |
| 6 | */ |
| 7 | |
| 8 | namespace AmeliaVendor\WpOrg\Requests; |
| 9 | |
| 10 | use AmeliaVendor\WpOrg\Requests\Exception\InvalidArgument; |
| 11 | use AmeliaVendor\WpOrg\Requests\Utility\InputValidator; |
| 12 | |
| 13 | /** |
| 14 | * Class to validate and to work with IPv6 addresses |
| 15 | * |
| 16 | * This was originally based on the PEAR class of the same name, but has been |
| 17 | * entirely rewritten. |
| 18 | * |
| 19 | * @package Requests\Utilities |
| 20 | */ |
| 21 | final class Ipv6 { |
| 22 | /** |
| 23 | * Uncompresses an IPv6 address |
| 24 | * |
| 25 | * RFC 4291 allows you to compress consecutive zero pieces in an address to |
| 26 | * '::'. This method expects a valid IPv6 address and expands the '::' to |
| 27 | * the required number of zero pieces. |
| 28 | * |
| 29 | * Example: FF01::101 -> FF01:0:0:0:0:0:0:101 |
| 30 | * ::1 -> 0:0:0:0:0:0:0:1 |
| 31 | * |
| 32 | * @author Alexander Merz <alexander.merz@web.de> |
| 33 | * @author elfrink at introweb dot nl |
| 34 | * @author Josh Peck <jmp at joshpeck dot org> |
| 35 | * @copyright 2003-2005 The PHP Group |
| 36 | * @license https://opensource.org/licenses/bsd-license.php |
| 37 | * |
| 38 | * @param string|Stringable $ip An IPv6 address |
| 39 | * @return string The uncompressed IPv6 address |
| 40 | * |
| 41 | * @throws \AmeliaVendor\WpOrg\Requests\Exception\InvalidArgument When the passed argument is not a string or a stringable object. |
| 42 | */ |
| 43 | public static function uncompress($ip) { |
| 44 | if (InputValidator::is_string_or_stringable($ip) === false) { |
| 45 | throw InvalidArgument::create(1, '$ip', 'string|Stringable', gettype($ip)); |
| 46 | } |
| 47 | |
| 48 | $ip = (string) $ip; |
| 49 | |
| 50 | if (substr_count($ip, '::') !== 1) { |
| 51 | return $ip; |
| 52 | } |
| 53 | |
| 54 | list($ip1, $ip2) = explode('::', $ip); |
| 55 | $c1 = ($ip1 === '') ? -1 : substr_count($ip1, ':'); |
| 56 | $c2 = ($ip2 === '') ? -1 : substr_count($ip2, ':'); |
| 57 | |
| 58 | if (strpos($ip2, '.') !== false) { |
| 59 | $c2++; |
| 60 | } |
| 61 | |
| 62 | if ($c1 === -1 && $c2 === -1) { |
| 63 | // :: |
| 64 | $ip = '0:0:0:0:0:0:0:0'; |
| 65 | } elseif ($c1 === -1) { |
| 66 | // ::xxx |
| 67 | $fill = str_repeat('0:', 7 - $c2); |
| 68 | $ip = str_replace('::', $fill, $ip); |
| 69 | } elseif ($c2 === -1) { |
| 70 | // xxx:: |
| 71 | $fill = str_repeat(':0', 7 - $c1); |
| 72 | $ip = str_replace('::', $fill, $ip); |
| 73 | } else { |
| 74 | // xxx::xxx |
| 75 | $fill = ':' . str_repeat('0:', 6 - $c2 - $c1); |
| 76 | $ip = str_replace('::', $fill, $ip); |
| 77 | } |
| 78 | |
| 79 | return $ip; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Compresses an IPv6 address |
| 84 | * |
| 85 | * RFC 4291 allows you to compress consecutive zero pieces in an address to |
| 86 | * '::'. This method expects a valid IPv6 address and compresses consecutive |
| 87 | * zero pieces to '::'. |
| 88 | * |
| 89 | * Example: FF01:0:0:0:0:0:0:101 -> FF01::101 |
| 90 | * 0:0:0:0:0:0:0:1 -> ::1 |
| 91 | * |
| 92 | * @see \AmeliaVendor\WpOrg\Requests\Ipv6::uncompress() |
| 93 | * |
| 94 | * @param string $ip An IPv6 address |
| 95 | * @return string The compressed IPv6 address |
| 96 | */ |
| 97 | public static function compress($ip) { |
| 98 | // Prepare the IP to be compressed. |
| 99 | // Note: Input validation is handled in the `uncompress()` method, which is the first call made in this method. |
| 100 | $ip = self::uncompress($ip); |
| 101 | $ip_parts = self::split_v6_v4($ip); |
| 102 | |
| 103 | // Replace all leading zeros |
| 104 | $ip_parts[0] = preg_replace('/(^|:)0+([0-9])/', '\1\2', $ip_parts[0]); |
| 105 | |
| 106 | // Find bunches of zeros |
| 107 | if (preg_match_all('/(?:^|:)(?:0(?::|$))+/', $ip_parts[0], $matches, PREG_OFFSET_CAPTURE)) { |
| 108 | $max = 0; |
| 109 | $pos = null; |
| 110 | foreach ($matches[0] as $match) { |
| 111 | if (strlen($match[0]) > $max) { |
| 112 | $max = strlen($match[0]); |
| 113 | $pos = $match[1]; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | $ip_parts[0] = substr_replace($ip_parts[0], '::', $pos, $max); |
| 118 | } |
| 119 | |
| 120 | if ($ip_parts[1] !== '') { |
| 121 | return implode(':', $ip_parts); |
| 122 | } else { |
| 123 | return $ip_parts[0]; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * Splits an IPv6 address into the IPv6 and IPv4 representation parts |
| 129 | * |
| 130 | * RFC 4291 allows you to represent the last two parts of an IPv6 address |
| 131 | * using the standard IPv4 representation |
| 132 | * |
| 133 | * Example: 0:0:0:0:0:0:13.1.68.3 |
| 134 | * 0:0:0:0:0:FFFF:129.144.52.38 |
| 135 | * |
| 136 | * @param string $ip An IPv6 address |
| 137 | * @return string[] [0] contains the IPv6 represented part, and [1] the IPv4 represented part |
| 138 | */ |
| 139 | private static function split_v6_v4($ip) { |
| 140 | if (strpos($ip, '.') !== false) { |
| 141 | $pos = strrpos($ip, ':'); |
| 142 | $ipv6_part = substr($ip, 0, $pos); |
| 143 | $ipv4_part = substr($ip, $pos + 1); |
| 144 | return [$ipv6_part, $ipv4_part]; |
| 145 | } else { |
| 146 | return [$ip, '']; |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Checks an IPv6 address |
| 152 | * |
| 153 | * Checks if the given IP is a valid IPv6 address |
| 154 | * |
| 155 | * @param string $ip An IPv6 address |
| 156 | * @return bool true if $ip is a valid IPv6 address |
| 157 | */ |
| 158 | public static function check_ipv6($ip) { |
| 159 | // Note: Input validation is handled in the `uncompress()` method, which is the first call made in this method. |
| 160 | $ip = self::uncompress($ip); |
| 161 | list($ipv6, $ipv4) = self::split_v6_v4($ip); |
| 162 | $ipv6 = explode(':', $ipv6); |
| 163 | $ipv4 = explode('.', $ipv4); |
| 164 | if ((count($ipv6) === 8 && count($ipv4) === 1) || (count($ipv6) === 6 && count($ipv4) === 4)) { |
| 165 | foreach ($ipv6 as $ipv6_part) { |
| 166 | // The section can't be empty |
| 167 | if ($ipv6_part === '') { |
| 168 | return false; |
| 169 | } |
| 170 | |
| 171 | // Nor can it be over four characters |
| 172 | if (strlen($ipv6_part) > 4) { |
| 173 | return false; |
| 174 | } |
| 175 | |
| 176 | // Remove leading zeros (this is safe because of the above) |
| 177 | $ipv6_part = ltrim($ipv6_part, '0'); |
| 178 | if ($ipv6_part === '') { |
| 179 | $ipv6_part = '0'; |
| 180 | } |
| 181 | |
| 182 | // Check the value is valid |
| 183 | $value = hexdec($ipv6_part); |
| 184 | if (dechex($value) !== strtolower($ipv6_part) || $value < 0 || $value > 0xFFFF) { |
| 185 | return false; |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | if (count($ipv4) === 4) { |
| 190 | foreach ($ipv4 as $ipv4_part) { |
| 191 | $value = (int) $ipv4_part; |
| 192 | if ((string) $value !== $ipv4_part || $value < 0 || $value > 0xFF) { |
| 193 | return false; |
| 194 | } |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | return true; |
| 199 | } else { |
| 200 | return false; |
| 201 | } |
| 202 | } |
| 203 | } |
| 204 |