ipfw_objhash_foreach
ipfw_objhash_foreach(ii, destroy_iface, ch);
ipfw_objhash_foreach(ii, export_iface_internal, &da);
int ipfw_objhash_foreach(struct namedobj_instance *ni, objhash_cb_t *f,
ipfw_objhash_foreach(CHAIN_TO_SRV(chain),
ipfw_objhash_foreach(CHAIN_TO_NI(ch), export_table_internal, &dta);
ipfw_objhash_foreach(CHAIN_TO_NI(ch), destroy_table_locked, ch);
ipfw_objhash_foreach(icfg->ii, destroy_ifidx_locked, ch);
ipfw_objhash_foreach(icfg->ii, foreach_ifidx, &wa);
ipfw_objhash_foreach(vi, update_tvalue, &da);
ipfw_objhash_foreach(vi, dump_tvalue, &da);
ipfw_objhash_foreach(CHAIN_TO_VI(ch), destroy_value, ch);