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files >> /home/kckglobal/www/portal/vendor/laminas/laminas-diactoros/src/ServerRequestFilter/IPRange.php
<?php declare(strict_types=1); namespace Laminas\Diactoros\ServerRequestFilter; use function assert; use function count; use function explode; use function inet_pton; use function intval; use function ip2long; use function pack; use function sprintf; use function str_contains; use function str_pad; use function str_repeat; use function substr_compare; use function unpack; /** @internal */ final class IPRange { /** * Disable instantiation */ private function __construct() { } /** @psalm-pure */ public static function matches(string $ip, string $cidr): bool { if (str_contains($ip, ':')) { return self::matchesIPv6($ip, $cidr); } return self::matchesIPv4($ip, $cidr); } /** @psalm-pure */ public static function matchesIPv4(string $ip, string $cidr): bool { $mask = 32; $subnet = $cidr; if (str_contains($cidr, '/')) { $parts = explode('/', $cidr, 2); assert(count($parts) >= 2); [$subnet, $mask] = $parts; $mask = (int) $mask; } if ($mask < 0 || $mask > 32) { return false; } $ip = ip2long($ip); $subnet = ip2long($subnet); if (false === $ip || false === $subnet) { // Invalid data return false; } return 0 === substr_compare( sprintf("%032b", $ip), sprintf("%032b", $subnet), 0, $mask ); } /** @psalm-pure */ public static function matchesIPv6(string $ip, string $cidr): bool { $mask = 128; $subnet = $cidr; if (str_contains($cidr, '/')) { $parts = explode('/', $cidr, 2); assert(count($parts) >= 2); [$subnet, $mask] = $parts; $mask = (int) $mask; } if ($mask < 0 || $mask > 128) { return false; } $ip = inet_pton($ip); $subnet = inet_pton($subnet); if (false === $ip || false === $subnet) { // Invalid data return false; } // mask 0: if it's a valid IP, it's valid if ($mask === 0) { return (bool) unpack('n*', $ip); } // @see http://stackoverflow.com/questions/7951061/matching-ipv6-address-to-a-cidr-subnet, MW answer $binMask = str_repeat("f", intval($mask / 4)); switch ($mask % 4) { case 0: break; case 1: $binMask .= "8"; break; case 2: $binMask .= "c"; break; case 3: $binMask .= "e"; break; } $binMask = str_pad($binMask, 32, '0'); $binMask = pack("H*", $binMask); return ($ip & $binMask) === $subnet; } }
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