PRIV_NET_SETIFFIB
ret = priv_check(curthread, PRIV_NET_SETIFFIB);
case PRIV_NET_SETIFFIB:
error = priv_check(td, PRIV_NET_SETIFFIB);
if ((error = priv_check(curthread, PRIV_NET_SETIFFIB)) != 0)
case PRIV_NET_SETIFFIB: