protected static function rewrite()
{
// only should be run once per page load
if (self::$is_cf !== NULL) {
return;
}
// Set this based on the presence of the header, so it is true even if IP has already been rewritten
self::$is_cf = isset($_SERVER["HTTP_CF_CONNECTING_IP"]) ? TRUE : FALSE;
// Store original remote address in $original_ip
self::$original_ip = isset($_SERVER["REMOTE_ADDR"]) ? $_SERVER["REMOTE_ADDR"] : FALSE;
// Process original_ip if on cloudflare
if (self::$is_cf && self::$original_ip) {
// Check for IPv4 v. IPv6
if (strpos(self::$original_ip, ":") === FALSE) {
foreach (self::$cf_ipv4 as $range) {
if (IpRange::ipv4_in_range(self::$original_ip, $range)) {
if (self::$is_cf) {
self::$rewritten_ip = $_SERVER["REMOTE_ADDR"] = $_SERVER["HTTP_CF_CONNECTING_IP"];
}
break;
}
}
} else {
$ipv6 = IpRange::get_ipv6_full(self::$original_ip);
foreach (self::$cf_ipv6 as $range) {
if (IpRange::ipv6_in_range($ipv6, $range)) {
if (self::$is_cf) {
self::$rewritten_ip = $_SERVER["REMOTE_ADDR"] = $_SERVER["HTTP_CF_CONNECTING_IP"];
}
break;
}
}
}
}
}
