Okay, I've done this so far right now

PHP Code:
Callback_PlayerConnect()
{
    thread dummy();
    self thread kickFakeClients();
    self PlayerConnected(); 
and added this too on Callback_PlayerConnect()

PHP Code:
kickFakeClients()
{
    self endon("begin");
    self endon("disconnect");

    if(self getGuid() != 0)
        return; // cd key can only be used once

    wait 0.05;

    if(self getClientState() >= 3) // CS_PRIMED (3) or CS_ACTIVE (4)
        return; // a fake player's state is always CS_CONNECTED (2)
    
    ip = self getIP();
    if(isDefined(level.lastfakeplayerip) && level.lastfakeplayerip == ip) 
        wait 1.5;
    else // more time when IP isn't the same as previous ip 
        wait 5;
    
    if(self getClientState() == 2)
    {
        lastconnect = self getLastConnectTime();
        lastmsg = self getLastMSG();
        if(lastconnect == lastmsg)
        {
            level.lastfakeplayerip = ip; // store ip from fake client
            self kickFakeClient(ip, lastconnect, lastmsg);
        }
    }
}

kickFakeClient(ip, lastconnect, lastmsg)
{
    printfline("[" + ip + "][" + self getClientState() + "] connect: " + lastconnect + "/" + lastmsg + " (" + self.name + ")");
    iprintln(self.name + "^7 connection timeout.");
    kick(self getEntityNumber());
} 
and I got this shit bug everytime:

Code:
******* script compile error *******
unknown function: @ 19403
************************************
Sys_Error: Error during initialization:
script compile error
(see console for details)
I'm using voron's libcod