/**
* Get low and high IP addresses for a specified range.
*
* @param array $ipRange An IP address range in presentation format
* @return array|false Array ($lowIp, $highIp) in network address format, or false if failure
*/
static public function getIpsForRange($ipRange)
{
// in case mbstring overloads strlen function
$strlen = function_exists('mb_orig_strlen') ? 'mb_orig_strlen' : 'strlen';
if(strpos($ipRange, '/') === false)
{
$ipRange = self::sanitizeIpRange($ipRange);
}
$pos = strpos($ipRange, '/');
$bits = substr($ipRange, $pos + 1);
$range = substr($ipRange, 0, $pos);
$high = $low = @_inet_pton($range);
if($low === false)
{
return false;
}
$lowLen = $strlen($low);
$i = $lowLen - 1;
$bits = $lowLen * 8 - $bits;
for($n = (int)($bits / 8); $n > 0; $n--, $i--)
{
$low[$i] = chr(0);
$high[$i] = chr(255);
}
$n = $bits % 8;
if($n)
{
$low[$i] = chr(ord($low[$i]) & ~((1 << $n) - 1));
$high[$i] = chr(ord($high[$i]) | ((1 << $n) - 1));
}
return array($low, $high);
}
/**
* Get low and high IP addresses for a specified range.
*
* @param array $ipRange An IP address range in presentation format
* @return array|false Array ($lowIp, $highIp) in network address format, or false if failure
*/
public static function getIpsForRange($ipRange)
{
if (strpos($ipRange, '/') === false) {
$ipRange = self::sanitizeIpRange($ipRange);
}
$pos = strpos($ipRange, '/');
$bits = substr($ipRange, $pos + 1);
$range = substr($ipRange, 0, $pos);
$high = $low = @_inet_pton($range);
if ($low === false) {
return false;
}
$lowLen = Piwik_Common::strlen($low);
$i = $lowLen - 1;
$bits = $lowLen * 8 - $bits;
for ($n = (int) ($bits / 8); $n > 0; $n--, $i--) {
$low[$i] = chr(0);
$high[$i] = chr(255);
}
$n = $bits % 8;
if ($n) {
$low[$i] = chr(ord($low[$i]) & ~((1 << $n) - 1));
$high[$i] = chr(ord($high[$i]) | (1 << $n) - 1);
}
return array($low, $high);
}
