TYPE_IXFR
case TYPE_IXFR:
query->qtype != TYPE_AXFR && query->qtype != TYPE_IXFR);
(q->qtype!=TYPE_IXFR && NSCOUNT(q->packet) != 0)) {
if(q->qtype==TYPE_IXFR && NSCOUNT(q->packet) > 0) {
if(rr->type == TYPE_IXFR)
xfrd_setup_packet(tcp->packet, TYPE_IXFR, CLASS_IN, zone->apex,
xfrd_prepare_zone_xfr(zone, TYPE_IXFR);
xfrd_setup_packet(xfrd->packet, TYPE_IXFR, CLASS_IN, zone->apex,
xfrd_prepare_zone_xfr(zone, TYPE_IXFR);
&& zone->latest_xfr->query_type == TYPE_IXFR)