RE_F_DROP_RXFRAG
if (sc->re_flags & RE_F_DROP_RXFRAG) {
sc->re_flags |= RE_F_DROP_RXFRAG;
} else if (sc->re_flags & RE_F_DROP_RXFRAG) {
sc->re_flags &= ~RE_F_DROP_RXFRAG;
sc->re_flags &= ~(RE_F_TIMER_INTR | RE_F_DROP_RXFRAG | RE_F_LINKED);