Changeset 59141 for trunk/src/wp-includes/SimplePie/src/Net/IPv6.php
- Timestamp:
- 09/30/2024 10:48:16 PM (7 months ago)
- Location:
- trunk/src/wp-includes/SimplePie/src
- Files:
-
- 1 added
- 1 edited
- 1 moved
Legend:
- Unmodified
- Added
- Removed
-
trunk/src/wp-includes/SimplePie/src/Net/IPv6.php
r47733 r59141 1 1 <?php 2 2 3 /** 3 4 * SimplePie … … 6 7 * Takes the hard work out of managing a complete RSS/Atom solution. 7 8 * 8 * Copyright (c) 2004-20 16, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors9 * Copyright (c) 2004-2022, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors 9 10 * All rights reserved. 10 11 * … … 42 43 */ 43 44 45 namespace SimplePie\Net; 44 46 45 47 /** … … 56 58 * @author Sam Sneddon <geoffers@gmail.com> 57 59 */ 58 class SimplePie_Net_IPv660 class IPv6 59 61 { 60 /** 61 * Uncompresses an IPv6 address 62 * 63 * RFC 4291 allows you to compress concecutive zero pieces in an address to 64 * '::'. This method expects a valid IPv6 address and expands the '::' to 65 * the required number of zero pieces. 66 * 67 * Example: FF01::101 -> FF01:0:0:0:0:0:0:101 68 * ::1 -> 0:0:0:0:0:0:0:1 69 * 70 * @author Alexander Merz <alexander.merz@web.de> 71 * @author elfrink at introweb dot nl 72 * @author Josh Peck <jmp at joshpeck dot org> 73 * @copyright 2003-2005 The PHP Group 74 * @license http://www.opensource.org/licenses/bsd-license.php 75 * @param string $ip An IPv6 address 76 * @return string The uncompressed IPv6 address 77 */ 78 public static function uncompress($ip) 79 { 80 $c1 = -1; 81 $c2 = -1; 82 if (substr_count($ip, '::') === 1) 83 { 84 list($ip1, $ip2) = explode('::', $ip); 85 if ($ip1 === '') 86 { 87 $c1 = -1; 88 } 89 else 90 { 91 $c1 = substr_count($ip1, ':'); 92 } 93 if ($ip2 === '') 94 { 95 $c2 = -1; 96 } 97 else 98 { 99 $c2 = substr_count($ip2, ':'); 100 } 101 if (strpos($ip2, '.') !== false) 102 { 103 $c2++; 104 } 105 // :: 106 if ($c1 === -1 && $c2 === -1) 107 { 108 $ip = '0:0:0:0:0:0:0:0'; 109 } 110 // ::xxx 111 else if ($c1 === -1) 112 { 113 $fill = str_repeat('0:', 7 - $c2); 114 $ip = str_replace('::', $fill, $ip); 115 } 116 // xxx:: 117 else if ($c2 === -1) 118 { 119 $fill = str_repeat(':0', 7 - $c1); 120 $ip = str_replace('::', $fill, $ip); 121 } 122 // xxx::xxx 123 else 124 { 125 $fill = ':' . str_repeat('0:', 6 - $c2 - $c1); 126 $ip = str_replace('::', $fill, $ip); 127 } 128 } 129 return $ip; 130 } 131 132 /** 133 * Compresses an IPv6 address 134 * 135 * RFC 4291 allows you to compress concecutive zero pieces in an address to 136 * '::'. This method expects a valid IPv6 address and compresses consecutive 137 * zero pieces to '::'. 138 * 139 * Example: FF01:0:0:0:0:0:0:101 -> FF01::101 140 * 0:0:0:0:0:0:0:1 -> ::1 141 * 142 * @see uncompress() 143 * @param string $ip An IPv6 address 144 * @return string The compressed IPv6 address 145 */ 146 public static function compress($ip) 147 { 148 // Prepare the IP to be compressed 149 $ip = self::uncompress($ip); 150 $ip_parts = self::split_v6_v4($ip); 151 152 // Replace all leading zeros 153 $ip_parts[0] = preg_replace('/(^|:)0+([0-9])/', '\1\2', $ip_parts[0]); 154 155 // Find bunches of zeros 156 if (preg_match_all('/(?:^|:)(?:0(?::|$))+/', $ip_parts[0], $matches, PREG_OFFSET_CAPTURE)) 157 { 158 $max = 0; 159 $pos = null; 160 foreach ($matches[0] as $match) 161 { 162 if (strlen($match[0]) > $max) 163 { 164 $max = strlen($match[0]); 165 $pos = $match[1]; 166 } 167 } 168 169 $ip_parts[0] = substr_replace($ip_parts[0], '::', $pos, $max); 170 } 171 172 if ($ip_parts[1] !== '') 173 { 174 return implode(':', $ip_parts); 175 } 176 177 return $ip_parts[0]; 178 } 179 180 /** 181 * Splits an IPv6 address into the IPv6 and IPv4 representation parts 182 * 183 * RFC 4291 allows you to represent the last two parts of an IPv6 address 184 * using the standard IPv4 representation 185 * 186 * Example: 0:0:0:0:0:0:13.1.68.3 187 * 0:0:0:0:0:FFFF:129.144.52.38 188 * 189 * @param string $ip An IPv6 address 190 * @return array [0] contains the IPv6 represented part, and [1] the IPv4 represented part 191 */ 192 private static function split_v6_v4($ip) 193 { 194 if (strpos($ip, '.') !== false) 195 { 196 $pos = strrpos($ip, ':'); 197 $ipv6_part = substr($ip, 0, $pos); 198 $ipv4_part = substr($ip, $pos + 1); 199 return array($ipv6_part, $ipv4_part); 200 } 201 202 return array($ip, ''); 203 } 204 205 /** 206 * Checks an IPv6 address 207 * 208 * Checks if the given IP is a valid IPv6 address 209 * 210 * @param string $ip An IPv6 address 211 * @return bool true if $ip is a valid IPv6 address 212 */ 213 public static function check_ipv6($ip) 214 { 215 $ip = self::uncompress($ip); 216 list($ipv6, $ipv4) = self::split_v6_v4($ip); 217 $ipv6 = explode(':', $ipv6); 218 $ipv4 = explode('.', $ipv4); 219 if (count($ipv6) === 8 && count($ipv4) === 1 || count($ipv6) === 6 && count($ipv4) === 4) 220 { 221 foreach ($ipv6 as $ipv6_part) 222 { 223 // The section can't be empty 224 if ($ipv6_part === '') 225 return false; 226 227 // Nor can it be over four characters 228 if (strlen($ipv6_part) > 4) 229 return false; 230 231 // Remove leading zeros (this is safe because of the above) 232 $ipv6_part = ltrim($ipv6_part, '0'); 233 if ($ipv6_part === '') 234 $ipv6_part = '0'; 235 236 // Check the value is valid 237 $value = hexdec($ipv6_part); 238 if (dechex($value) !== strtolower($ipv6_part) || $value < 0 || $value > 0xFFFF) 239 return false; 240 } 241 if (count($ipv4) === 4) 242 { 243 foreach ($ipv4 as $ipv4_part) 244 { 245 $value = (int) $ipv4_part; 246 if ((string) $value !== $ipv4_part || $value < 0 || $value > 0xFF) 247 return false; 248 } 249 } 250 return true; 251 } 252 253 return false; 254 } 255 256 /** 257 * Checks if the given IP is a valid IPv6 address 258 * 259 * @codeCoverageIgnore 260 * @deprecated Use {@see SimplePie_Net_IPv6::check_ipv6()} instead 261 * @see check_ipv6 262 * @param string $ip An IPv6 address 263 * @return bool true if $ip is a valid IPv6 address 264 */ 265 public static function checkIPv6($ip) 266 { 267 return self::check_ipv6($ip); 268 } 62 /** 63 * Uncompresses an IPv6 address 64 * 65 * RFC 4291 allows you to compress concecutive zero pieces in an address to 66 * '::'. This method expects a valid IPv6 address and expands the '::' to 67 * the required number of zero pieces. 68 * 69 * Example: FF01::101 -> FF01:0:0:0:0:0:0:101 70 * ::1 -> 0:0:0:0:0:0:0:1 71 * 72 * @author Alexander Merz <alexander.merz@web.de> 73 * @author elfrink at introweb dot nl 74 * @author Josh Peck <jmp at joshpeck dot org> 75 * @copyright 2003-2005 The PHP Group 76 * @license http://www.opensource.org/licenses/bsd-license.php 77 * @param string $ip An IPv6 address 78 * @return string The uncompressed IPv6 address 79 */ 80 public static function uncompress($ip) 81 { 82 $c1 = -1; 83 $c2 = -1; 84 if (substr_count($ip, '::') === 1) { 85 [$ip1, $ip2] = explode('::', $ip); 86 if ($ip1 === '') { 87 $c1 = -1; 88 } else { 89 $c1 = substr_count($ip1, ':'); 90 } 91 if ($ip2 === '') { 92 $c2 = -1; 93 } else { 94 $c2 = substr_count($ip2, ':'); 95 } 96 if (strpos($ip2, '.') !== false) { 97 $c2++; 98 } 99 // :: 100 if ($c1 === -1 && $c2 === -1) { 101 $ip = '0:0:0:0:0:0:0:0'; 102 } 103 // ::xxx 104 elseif ($c1 === -1) { 105 $fill = str_repeat('0:', 7 - $c2); 106 $ip = str_replace('::', $fill, $ip); 107 } 108 // xxx:: 109 elseif ($c2 === -1) { 110 $fill = str_repeat(':0', 7 - $c1); 111 $ip = str_replace('::', $fill, $ip); 112 } 113 // xxx::xxx 114 else { 115 $fill = ':' . str_repeat('0:', 6 - $c2 - $c1); 116 $ip = str_replace('::', $fill, $ip); 117 } 118 } 119 return $ip; 120 } 121 122 /** 123 * Compresses an IPv6 address 124 * 125 * RFC 4291 allows you to compress concecutive zero pieces in an address to 126 * '::'. This method expects a valid IPv6 address and compresses consecutive 127 * zero pieces to '::'. 128 * 129 * Example: FF01:0:0:0:0:0:0:101 -> FF01::101 130 * 0:0:0:0:0:0:0:1 -> ::1 131 * 132 * @see uncompress() 133 * @param string $ip An IPv6 address 134 * @return string The compressed IPv6 address 135 */ 136 public static function compress($ip) 137 { 138 // Prepare the IP to be compressed 139 $ip = self::uncompress($ip); 140 $ip_parts = self::split_v6_v4($ip); 141 142 // Replace all leading zeros 143 $ip_parts[0] = preg_replace('/(^|:)0+([0-9])/', '\1\2', $ip_parts[0]); 144 145 // Find bunches of zeros 146 if (preg_match_all('/(?:^|:)(?:0(?::|$))+/', $ip_parts[0], $matches, PREG_OFFSET_CAPTURE)) { 147 $max = 0; 148 $pos = null; 149 foreach ($matches[0] as $match) { 150 if (strlen($match[0]) > $max) { 151 $max = strlen($match[0]); 152 $pos = $match[1]; 153 } 154 } 155 156 $ip_parts[0] = substr_replace($ip_parts[0], '::', $pos, $max); 157 } 158 159 if ($ip_parts[1] !== '') { 160 return implode(':', $ip_parts); 161 } 162 163 return $ip_parts[0]; 164 } 165 166 /** 167 * Splits an IPv6 address into the IPv6 and IPv4 representation parts 168 * 169 * RFC 4291 allows you to represent the last two parts of an IPv6 address 170 * using the standard IPv4 representation 171 * 172 * Example: 0:0:0:0:0:0:13.1.68.3 173 * 0:0:0:0:0:FFFF:129.144.52.38 174 * 175 * @param string $ip An IPv6 address 176 * @return array [0] contains the IPv6 represented part, and [1] the IPv4 represented part 177 */ 178 private static function split_v6_v4($ip) 179 { 180 if (strpos($ip, '.') !== false) { 181 $pos = strrpos($ip, ':'); 182 $ipv6_part = substr($ip, 0, $pos); 183 $ipv4_part = substr($ip, $pos + 1); 184 return [$ipv6_part, $ipv4_part]; 185 } 186 187 return [$ip, '']; 188 } 189 190 /** 191 * Checks an IPv6 address 192 * 193 * Checks if the given IP is a valid IPv6 address 194 * 195 * @param string $ip An IPv6 address 196 * @return bool true if $ip is a valid IPv6 address 197 */ 198 public static function check_ipv6($ip) 199 { 200 $ip = self::uncompress($ip); 201 [$ipv6, $ipv4] = self::split_v6_v4($ip); 202 $ipv6 = explode(':', $ipv6); 203 $ipv4 = explode('.', $ipv4); 204 if (count($ipv6) === 8 && count($ipv4) === 1 || count($ipv6) === 6 && count($ipv4) === 4) { 205 foreach ($ipv6 as $ipv6_part) { 206 // The section can't be empty 207 if ($ipv6_part === '') { 208 return false; 209 } 210 211 // Nor can it be over four characters 212 if (strlen($ipv6_part) > 4) { 213 return false; 214 } 215 216 // Remove leading zeros (this is safe because of the above) 217 $ipv6_part = ltrim($ipv6_part, '0'); 218 if ($ipv6_part === '') { 219 $ipv6_part = '0'; 220 } 221 222 // Check the value is valid 223 $value = hexdec($ipv6_part); 224 if (dechex($value) !== strtolower($ipv6_part) || $value < 0 || $value > 0xFFFF) { 225 return false; 226 } 227 } 228 if (count($ipv4) === 4) { 229 foreach ($ipv4 as $ipv4_part) { 230 $value = (int) $ipv4_part; 231 if ((string) $value !== $ipv4_part || $value < 0 || $value > 0xFF) { 232 return false; 233 } 234 } 235 } 236 return true; 237 } 238 239 return false; 240 } 241 242 /** 243 * Checks if the given IP is a valid IPv6 address 244 * 245 * @codeCoverageIgnore 246 * @deprecated Use {@see IPv6::check_ipv6()} instead 247 * @see check_ipv6 248 * @param string $ip An IPv6 address 249 * @return bool true if $ip is a valid IPv6 address 250 */ 251 public static function checkIPv6($ip) 252 { 253 return self::check_ipv6($ip); 254 } 269 255 } 256 257 class_alias('SimplePie\Net\IPv6', 'SimplePie_Net_IPv6');
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