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<?php
namespace ipl\Validator;
use ipl\I18n\Translation;
use ipl\Stdlib\Str;
/**
* Validate a classless inter-domain routing (CIDR)
*/
class CidrValidator extends BaseValidator
{
use Translation;
public function isValid($value): bool
{
$this->clearMessages();
$pieces = Str::trimSplit($value, '/');
if (count($pieces) !== 2) {
$this->addMessage(sprintf(
$this->translate('CIDR "%s" does not conform to the required format $address/$prefix'),
$value
));
return false;
}
list($address, $prefix) = $pieces;
$inaddr = @inet_pton($address);
if ($inaddr === false) {
$this->addMessage(sprintf($this->translate('CIDR "%s" contains an invalid address'), $value));
return false;
}
if (! is_numeric($prefix)) {
$this->addMessage(sprintf($this->translate('Prefix of CIDR "%s" must be a number'), $value));
return false;
}
$isIPv6 = isset($inaddr[4]);
$prefix = (int) $prefix;
$maxPrefixLength = $isIPv6 ? 128 : 32;
if ($prefix < 0 || $prefix > $maxPrefixLength) {
$this->addMessage(sprintf(
$this->translate('Prefix length of CIDR "%s" must be between 0 and %d for IPv%d addresses'),
$value,
$maxPrefixLength,
$isIPv6 ? 6 : 4
));
return false;
}
return true;
}
}
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