diff --git a/ospf6d/ospf6_lsdb.h b/ospf6d/ospf6_lsdb.h
new file mode 100644
index 0000000..50eedc8
--- /dev/null
+++ b/ospf6d/ospf6_lsdb.h
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2002 Yasuhiro Ohara
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra 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 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra 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 GNU Zebra; see the file COPYING.  If not, write to the 
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 
+ * Boston, MA 02111-1307, USA.  
+ */
+
+#ifndef OSPF6_LSDB_H
+#define OSPF6_LSDB_H
+
+#include "prefix.h"
+#include "table.h"
+
+#include "ospf6_prefix.h"
+#include "ospf6_lsa.h"
+
+struct ospf6_lsdb_node
+{
+  struct prefix_ipv6 key;
+
+  struct route_node *node;
+  struct route_node *next;
+
+  struct ospf6_lsa *lsa;
+};
+
+struct ospf6_lsdb
+{
+  struct route_table *table;
+  u_int32_t count;
+  void (*hook) (struct ospf6_lsa *);
+};
+
+/* int  ospf6_lsdb_is_end (struct ospf6_lsdb_node *lsdb_node); */
+#define ospf6_lsdb_is_end(lsdb_node) ((lsdb_node)->node == NULL ? 1 : 0)
+
+/* global holding hooks for each LS type */
+struct ospf6_lsdb_hook_t
+{
+  void (*hook) (struct ospf6_lsa *old, struct ospf6_lsa *new);
+};
+extern struct ospf6_lsdb_hook_t *ospf6_lsdb_hook;
+
+/* Function Prototypes */
+struct ospf6_lsdb * ospf6_lsdb_create ();
+void ospf6_lsdb_delete (struct ospf6_lsdb *lsdb);
+
+void ospf6_lsdb_remove_maxage (struct ospf6_lsdb *lsdb);
+
+struct ospf6_lsa *
+ospf6_lsdb_lookup (u_int16_t type, u_int32_t id, u_int32_t adv_router,
+                   void *scope);
+
+void ospf6_lsdb_install (struct ospf6_lsa *new);
+
+void ospf6_lsdb_head (struct ospf6_lsdb_node *node, struct ospf6_lsdb *lsdb);
+void ospf6_lsdb_type (struct ospf6_lsdb_node *node, u_int16_t type,
+                      struct ospf6_lsdb *lsdb);
+void ospf6_lsdb_type_router (struct ospf6_lsdb_node *node, u_int16_t type,
+                             u_int32_t adv_router, struct ospf6_lsdb *lsdb);
+void ospf6_lsdb_next (struct ospf6_lsdb_node *node);
+
+void ospf6_lsdb_add (struct ospf6_lsa *lsa, struct ospf6_lsdb *lsdb);
+void ospf6_lsdb_remove (struct ospf6_lsa *lsa, struct ospf6_lsdb *lsdb);
+void ospf6_lsdb_remove_all (struct ospf6_lsdb *lsdb);
+
+struct ospf6_lsa *
+ospf6_lsdb_lookup_lsdb (u_int16_t type, u_int32_t id, u_int32_t adv_router,
+                        struct ospf6_lsdb *lsdb);
+
+void ospf6_lsdb_init ();
+
+#endif /* OSPF6_LSDB_H */
+