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Add function is_ip

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This commit is contained in:
Laurent Destailleur 2010-04-13 19:56:24 +00:00
parent 916e3de6a7
commit b48377312b
1 changed files with 18 additions and 0 deletions
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18
htdocs/lib/functions2.lib.php
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@ -1092,3 +1092,21 @@ function getListOfModels($db,$type)
if ($found) return $liste;
else return 0;
}
/**
* \brief This function evaluates a string that should be a valid IPv4
* \return It returns 0 if $ip is not a valid IPv4
* It returns 1 if $ip is a valid IPv4 and is a public IP
* It returns 2 if $ip is a valid IPv4 and is a private lan IP
*/
function is_ip($ip)
{
if (!ereg("^([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$", $ip)) return 0;
if (sprintf("%u",ip2long($ip)) == sprintf("%u",ip2long('255.255.255.255'))) return 0;
if (sprintf("%u",ip2long('10.0.0.0')) <= sprintf("%u",ip2long($ip)) and sprintf("%u",ip2long($ip)) <= sprintf("%u",ip2long('10.255.255.255'))) return 2;
if (sprintf("%u",ip2long('172.16.0.0')) <= sprintf("%u",ip2long($ip)) and sprintf("%u",ip2long($ip)) <= sprintf("%u",ip2long('172.31.255.255'))) return 2;
if (sprintf("%u",ip2long('192.168.0.0')) <= sprintf("%u",ip2long($ip)) and sprintf("%u",ip2long($ip)) <= sprintf("%u",ip2long('192.168.255.255'))) return 2;
if (sprintf("%u",ip2long('169.254.0.0')) <= sprintf("%u",ip2long($ip)) and sprintf("%u",ip2long($ip)) <= sprintf("%u",ip2long('169.254.255.255'))) return 2;
return 1;
}