ND_NA_FLAG_ROUTER
na->nd_na_flags_reserved & ND_NA_FLAG_ROUTER ?
if (na->nd_na_flags_reserved & ND_NA_FLAG_ROUTER)
na->nd_na_flags_reserved |= ND_NA_FLAG_ROUTER;
if (!(flag & ND_NA_FLAG_ROUTER) && (ncec->ncec_flags &