/**
* Converts IPv6s to numbers. This makes ban checks much easier.
*
* @param string $ip ip address to be converted
* @return int[] array
*/
function convertIPv6toInts($ip)
{
static $expanded = array();
// Check if we have done this already.
if (isset($expanded[$ip])) {
return $expanded[$ip];
}
// Expand the IP out.
$expanded_ip = explode(':', expandIPv6($ip));
$new_ip = array();
foreach ($expanded_ip as $int) {
$new_ip[] = hexdec($int);
}
// Save this incase of repeated use.
$expanded[$ip] = $new_ip;
return $expanded[$ip];
}
/**
* Convert a single IP to a ranged IP.
*
* - internal function used to convert a user-readable format to a format suitable for the database.
*
* @param string $fullip
* @return array|string 'unknown' if the ip in the input was '255.255.255.255'
*/
function ip2range($fullip)
{
// If its IPv6, validate it first.
if (isValidIPv6($fullip) !== false) {
$ip_parts = explode(':', expandIPv6($fullip, false));
$ip_array = array();
if (count($ip_parts) != 8) {
return array();
}
for ($i = 0; $i < 8; $i++) {
if ($ip_parts[$i] == '*') {
$ip_array[$i] = array('low' => '0', 'high' => hexdec('ffff'));
} elseif (preg_match('/^([0-9A-Fa-f]{1,4})\\-([0-9A-Fa-f]{1,4})$/', $ip_parts[$i], $range) == 1) {
$ip_array[$i] = array('low' => hexdec($range[1]), 'high' => hexdec($range[2]));
} elseif (is_numeric(hexdec($ip_parts[$i]))) {
$ip_array[$i] = array('low' => hexdec($ip_parts[$i]), 'high' => hexdec($ip_parts[$i]));
}
}
return $ip_array;
}
// Pretend that 'unknown' is 255.255.255.255. (since that can't be an IP anyway.)
if ($fullip == 'unknown') {
$fullip = '255.255.255.255';
}
$ip_parts = explode('.', $fullip);
$ip_array = array();
if (count($ip_parts) != 4) {
return array();
}
for ($i = 0; $i < 4; $i++) {
if ($ip_parts[$i] == '*') {
$ip_array[$i] = array('low' => '0', 'high' => '255');
} elseif (preg_match('/^(\\d{1,3})\\-(\\d{1,3})$/', $ip_parts[$i], $range) == 1) {
$ip_array[$i] = array('low' => $range[1], 'high' => $range[2]);
} elseif (is_numeric($ip_parts[$i])) {
$ip_array[$i] = array('low' => $ip_parts[$i], 'high' => $ip_parts[$i]);
}
}
// Makes it simpiler to work with.
$ip_array[4] = array('low' => 0, 'high' => 0);
$ip_array[5] = array('low' => 0, 'high' => 0);
$ip_array[6] = array('low' => 0, 'high' => 0);
$ip_array[7] = array('low' => 0, 'high' => 0);
return $ip_array;
}
