update: do not remove processed requests from DDNS queue.

src/knot/nameserver/update.c

@@ -443,13 +443,21 @@ static void send_update_response(const zone_t *zone, struct knot_request *req)
 	}
 }
 
+static void free_request(struct knot_request *req)
+{
+	close(req->fd);
+	knot_pkt_free(&req->query);
+	knot_pkt_free(&req->resp);
+	free(req);
+}
+
 static void send_update_responses(const zone_t *zone, list_t *updates)
 {
 	struct knot_request *req;
 	node_t *nxt = NULL;
 	WALK_LIST_DELSAFE(req, nxt, *updates) {
 		send_update_response(zone, req);
-		knot_request_free(NULL, req);
+		free_request(req);
 	}
 	init_list(updates);
 }
@@ -481,7 +489,7 @@ static int init_update_responses(const zone_t *zone, list_t *updates,
 			// ACL/TSIG check failed, send response.
 			send_update_response(zone, req);
 			// Remove this request from processing list.
-			knot_request_free(NULL, req);
+			free_request(req);
 			*update_count -= 1;
 		}
 	}

src/knot/zone/events/replan.c

@@ -96,7 +96,7 @@ static void replan_flush(zone_t *zone, const zone_t *old_zone)
 /*!< \brief Creates new DDNS q in the new zone - q contains references from the old zone. */
 static void duplicate_ddns_q(zone_t *zone, zone_t *old_zone)
 {
-	struct request_data *d, *nxt;
+	struct knot_request *d, *nxt;
 	WALK_LIST_DELSAFE(d, nxt, old_zone->ddns_queue) {
 		add_tail(&zone->ddns_queue, (node_t *)d);
 	}