fr_nataddrsync
fr_nataddrsync(0, NULL, NULL, ifs);
fr_nataddrsync(4, (void *)hn->hne_nic, &sin->sin_addr,
fr_nataddrsync(6, (void *)hn->hne_nic, &sin6->sin6_addr,
extern void fr_nataddrsync __P((int, void *, void *, ipf_stack_t *));