NPF_NAT_STATIC
if (np->n_flags & NPF_NAT_STATIC) {
KASSERT(np->n_flags & NPF_NAT_STATIC);
if (np->n_flags & NPF_NAT_STATIC) {
flags = NPF_NAT_STATIC;
ifname, (flags & NPF_NAT_STATIC) ? "static" : "dynamic",