IS_ALL_ROUTERS
ifp->int_state &= ~(IS_ALL_HOSTS | IS_ALL_ROUTERS);
if (ifp->int_state & IS_ALL_ROUTERS) {
ifp->int_state &= ~IS_ALL_ROUTERS;
} else if (!(ifp->int_state & IS_ALL_ROUTERS)) {
ifp->int_state |= IS_ALL_ROUTERS;
{ IS_ALL_ROUTERS, 0, "" },