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Add validateCidr()

This commit is contained in:
billz 2020-08-28 23:40:46 +01:00
parent 4f7784215d
commit 34b5b4c1b2
1 changed files with 27 additions and 0 deletions
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27
includes/functions.php
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@ -452,3 +452,30 @@ function getBridgedState()
return $arrHostapdConf['BridgedEnable'];
}
/**
* Validates the format of a CIDR notation string
*
* @param string $cidr
* @return bool
*/
function validateCidr($cidr)
{
$parts = explode('/', $cidr);
if(count($parts) != 2) {
return false;
}
$ip = $parts[0];
$netmask = intval($parts[1]);
if($netmask < 0) {
return false;
}
if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
return $netmask <= 32;
}
if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
return $netmask <= 128;
}
return false;
}