NAF_MOREFRAG
na.na_flags = NAF_MOREFRAG;
if (!(na->na_flags & NAF_MOREFRAG)) {
if (!(na->na_flags & NAF_MOREFRAG)) {
if (hwna->na_flags & NAF_MOREFRAG)
na->na_flags |= NAF_MOREFRAG;
na.na_flags = NAF_BDG_MAYSLEEP | NAF_MOREFRAG | NAF_OFFSETS;