1 files changed, 25 insertions, 0 deletions
diff --git a/lib/layer/iterate.h b/lib/layer/iterate.h
new file mode 100644
index 0000000..4ea4351
--- /dev/null
+++ b/lib/layer/iterate.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) CZ.NIC, z.s.p.o. <knot-resolver@labs.nic.cz>
+ *  SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include "lib/layer.h"
+#include "lib/rplan.h"
+
+/* Packet classification. */
+enum {
+	PKT_NOERROR   = 1 << 0, /* Positive response */
+	PKT_NODATA    = 1 << 1, /* No data response */
+	PKT_NXDOMAIN  = 1 << 2, /* Negative response */
+	PKT_REFUSED   = 1 << 3, /* Refused response */
+	PKT_ERROR     = 1 << 4  /* Bad message */
+};
+
+/** Classify response by type. */
+KR_EXPORT
+int kr_response_classify(const knot_pkt_t *pkt);
+
+/** Make next iterative query. */
+KR_EXPORT
+int kr_make_query(struct kr_query *query, knot_pkt_t *pkt);