#define LAGMAXTIME 15000 // a lag period of 15 seconds is needed
#define NOLAGMINTIME 4000 // a client is considered as not lagging anymore after 4 seconds without lag
#define MAXPING 500

void check_lag(client *cl)
{
    if(gamemillis < 10000 || (servmillis - cl->connectmillis) < 10000 || MAXPING < 300) return; // do not check at the beginning of a game or when the player joined too recently
    if(cl->spj > 50 || cl->ping > MAXPING || cl->ldt > 80) // currently lagging
    {
        if(!cl->lagmillis) // lag period starting
        {
            cl->lagmillis = servmillis;
        }
        else if(servmillis - cl->lagmillis > LAGMAXTIME) // lag max time reached
        {
            disconnect_client(cl->clientnum, DISC_LAG);
        }
    }
    else if(cl->lagmillis)
    if(!cl->nolagmillis)
    {// stopped lagging during a lag period
        cl->nolagmillis = servmillis;
    }
    else if(servmillis - cl->nolagmillis > NOLAGMINTIME) // no-lag period long enough, lag period ended
    {
        cl->lagmillis = cl->nolagmillis = 0;
    }
}