sat_zero
memcpy(&sat->sat_zero, &nr, sizeof(nr));
nr = (struct netrange *) (sat2->sat_zero);
cnr = (const struct netrange *)csat->sat_zero;
cnr = (const struct netrange *)csat->sat_zero;
nr = (struct netrange *)&u.sat.sat_zero;
memcpy(&nr, sat->sat_zero, sizeof(struct netrange));
memcpy(AA_SAT(aa)->sat_zero, sat->sat_zero, sizeof(struct netrange));