pn_same_half
late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
(!secy->xpn || pn_same_half(pn, lowest_pn))) {
!pn_same_half(pn, rx_sa->next_pn_halves.lower)) {
!pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower))