1 files changed, 99 insertions, 0 deletions
diff --git a/src/knot/zone/timers.h b/src/knot/zone/timers.h
new file mode 100644
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+++ b/src/knot/zone/timers.h
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+/*  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 <stdint.h>
+#include <time.h>
+
+#include "libknot/dname.h"
+#include "knot/journal/knot_lmdb.h"
+
+#define LAST_NOTIFIED_SERIAL_VALID (1LLU << 32)
+
+/*!
+ * \brief Persistent zone timers.
+ */
+struct zone_timers {
+	uint32_t soa_expire;           //!< SOA expire value. DEPRECATED
+	time_t last_flush;             //!< Last zone file synchronization.
+	time_t last_refresh;           //!< Last successful zone refresh attempt. DEPRECATED
+	time_t next_refresh;           //!< Next zone refresh attempt.
+	bool last_refresh_ok;          //!< Last zone refresh attempt was successful.
+	uint64_t last_notified_serial; //!< SOA serial of last successful NOTIFY; (1<<32) if none.
+	time_t next_ds_check;          //!< Next parent DS check.
+	time_t next_ds_push;           //!< Next DDNS to parent zone with updated DS record.
+	time_t catalog_member;         //!< This catalog member zone created.
+	time_t next_expire;            //!< Timestamp of the zone to expire.
+};
+
+typedef struct zone_timers zone_timers_t;
+
+/*!
+ * \brief From zonedb.h
+ */
+typedef struct knot_zonedb knot_zonedb_t;
+
+/*!
+ * \brief Load timers for one zone.
+ *
+ * \param[in]  db      Timer database.
+ * \param[in]  zone    Zone name.
+ * \param[out] timers  Loaded timers
+ *
+ * \return KNOT_E*
+ * \retval KNOT_ENOENT  Zone not found in the database.
+ */
+int zone_timers_read(knot_lmdb_db_t *db, const knot_dname_t *zone,
+                     zone_timers_t *timers);
+
+/*!
+ * \brief Write timers for one zone.
+ *
+ * \param db      Timer database.
+ * \param zone    Zone name.
+ * \param timers  Loaded timers
+ *
+ * \return KNOT_E*
+ */
+int zone_timers_write(knot_lmdb_db_t *db, const knot_dname_t *zone,
+                      const zone_timers_t *timers);
+
+/*!
+ * \brief Write timers for all zones.
+ *
+ * \param db      Timer database.
+ * \param zonedb  Zones database.
+ *
+ * \return KNOT_E*
+ */
+int zone_timers_write_all(knot_lmdb_db_t *db, knot_zonedb_t *zonedb);
+
+/*!
+ * \brief Selectively delete zones from the database.
+ *
+ * \param db         Timer database.
+ * \param keep_zone  Filtering callback.
+ * \param cb_data    Data passed to callback function.
+ *
+ * \return KNOT_E*
+ */
+int zone_timers_sweep(knot_lmdb_db_t *db, sweep_cb keep_zone, void *cb_data);
+
+/*!
+ * \brief Tell if the specified serial has already been notified according to timers.
+ */
+bool zone_timers_serial_notified(const zone_timers_t *timers, uint32_t serial);