RTK_ATTACHED
if ((sc->sc_flags & RTK_ATTACHED) == 0)
sc->sc_flags &= ~RTK_ATTACHED;
sc->sc_flags |= RTK_ATTACHED;
sc->sc_flags |= RTK_ATTACHED;
if ((sc->sc_flags & RTK_ATTACHED) == 0)
sc->sc_flags &= ~RTK_ATTACHED;
if ((sc->sc_flags & RTK_ATTACHED) != 0)