ia_flags
if ((ia6->ia_flags & IFA_ROUTE) != 0)
ia6->ia_flags &= ~IFA_ROUTE;
if ((ifp->if_flags & IFF_POINTOPOINT) && (ia6->ia_flags & IFA_ROUTE) &&
ia6->ia_flags &= ~IFA_ROUTE;
ia6->ia_flags |= IFA_ROUTE;