IFA_F_STABLE_PRIVACY
IFA_F_MANAGETEMPADDR | IFA_F_STABLE_PRIVACY)
if (ifp->flags & IFA_F_STABLE_PRIVACY) {
addr_flags |= IFA_F_STABLE_PRIVACY;
IFA_F_STABLE_PRIVACY);
!(ifp->flags & IFA_F_STABLE_PRIVACY)) {