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<?php |
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/** |
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* Linna Filter |
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* |
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* @author Sebastian Rapetti <[email protected]> |
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* @copyright (c) 2018, Sebastian Rapetti |
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* @license http://opensource.org/licenses/MIT MIT License |
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*/ |
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declare(strict_types=1); |
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namespace Linna\Filter\Rules; |
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use InvalidArgumentException; |
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/** |
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* Check if provided ipv4 is in CIDR range. |
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* |
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*/ |
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class IPv4Range extends Ip implements RuleValidateInterface |
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{ |
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/** |
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* @var array Rule properties |
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*/ |
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public static $config = [ |
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'class' => 'Ip', |
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'full_class' => __CLASS__, |
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'alias' => ['ipv4range', 'ip4r'], |
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'args_count' => 1, |
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'args_type' => [], |
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'has_validate' => true |
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]; |
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/** |
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* @var string Error message |
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*/ |
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private $message = ''; |
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/** |
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* Validate. |
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* |
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* @return bool |
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*/ |
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public function validate(): bool |
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{ |
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$args = func_get_args(); |
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return $this->concreteValidate($args[0], $args[1]); |
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} |
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/** |
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* Concrete validate. |
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* |
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* @param string $received |
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* @param string $range |
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* |
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* @return bool |
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*/ |
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private function concreteValidate(string $received, string $range): bool |
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{ |
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[$address, $bitSuffix] = $this->getRange($range); |
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if (parent::validate($received)) { |
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$this->message = 'Received value is not a valid ip address'; |
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return true; |
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} |
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$decimalWildcard = pow(2, (32 - $bitSuffix)) - 1; |
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$decimalBits = ~ $decimalWildcard; |
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$result = ((ip2long($received) & $decimalBits) === (ip2long($address) & $decimalBits)); |
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if ($result) { |
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return false; |
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} |
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$this->message = "Received ip is not in ({$range}) range"; |
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return true; |
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} |
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/** |
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* Get ip and bits for subnet mask. |
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* |
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* @param string $range |
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* |
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* @return array |
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* |
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* @throws InvalidArgumentException If range is not in valid format |
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*/ |
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private function getRange(string $range): array |
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{ |
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$cidr = explode('/', $range, 2); |
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$address = $cidr[0]; |
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$bitSuffix = $cidr[1] ?? null; |
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if (empty($bitSuffix)) { |
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throw new InvalidArgumentException('Range must be in valid IP/CIDR format, empty bits for suffix.'); |
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} |
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if ((int) $bitSuffix < 1 || (int) $bitSuffix > 32) { |
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throw new InvalidArgumentException('Range must be in valid IP/CIDR format, invalid bits suffix range.'); |
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} |
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if (parent::validate($address)) { |
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throw new InvalidArgumentException('Range must be in valid IP/CIDR format, invalid address.'); |
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} |
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return [$address, $bitSuffix]; |
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} |
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/** |
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* Return error message. |
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* |
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* @return string Error message |
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*/ |
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2 |
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public function getMessage(): string |
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{ |
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2 |
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return $this->message; |
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} |
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} |
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linna /
filter
