Adding upstream version 3.3.4.upstream/3.3.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/src/knot/zone/reverse.h b/src/knot/zone/reverse.h
new file mode 100644
index 0000000..b05e0cc
--- /dev/null
+++ b/src/knot/zone/reverse.h
@@ -0,0 +1,41 @@
+/*  Copyright (C) 2022 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "knot/updates/zone-update.h"
+
+/*!
+ * \brief Create/update reverse zone based on forward zone.
+ *
+ * \param from           Forward zone to be reversed.
+ * \param to_conts       Out/optional: resulting reverse zone.
+ * \param to_upd         Out/optional: resulting update of reverse zone.
+ * \param to_upd_rem     Trigger removal from reverse zone.
+ *
+ * \return KNOT_E*
+ */
+int zone_reverse(zone_contents_t *from, zone_contents_t *to_conts,
+                 zone_update_t *to_upd, bool to_upd_rem);
+
+inline static int changeset_reverse(changeset_t *from, zone_update_t *to)
+{
+	int ret = zone_reverse(from->remove, NULL, to, true);
+	if (ret == KNOT_EOK) {
+		ret = zone_reverse(from->add, NULL, to, false);
+	}
+	return ret;
+}