sc_route6
sc->sc_route6.ro_rt = NULL;
struct route_in6 *ro6 = &sc->sc_route6;
sc->sc_route6.ro_rt = NULL;
rt = isipv6 ? sc->sc_route6.ro_rt : sc->sc_route.ro_rt;
inp->in6p_route = sc->sc_route6;
sc->sc_route6.ro_rt = NULL;