diff --git a/ospf6d/ospf6_area.h b/ospf6d/ospf6_area.h
new file mode 100644
index 0000000..0684464
--- /dev/null
+++ b/ospf6d/ospf6_area.h
@@ -0,0 +1,90 @@
+/*
+ * OSPF6 Area Data Structure
+ * Copyright (C) 1999 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 OSPF_AREA_H
+#define OSPF_AREA_H
+
+/* This file defines area parameters and data structures. */
+
+#define OSPF6_AREA_RANGE_ADVERTISE     0
+#define OSPF6_AREA_RANGE_NOT_ADVERTISE 1
+
+#include "ospf6_spf.h"
+#include "ospf6_top.h"
+
+struct ospf6_area
+{
+  char            str[16];
+
+  struct ospf6   *ospf6;      /* back pointer */
+  u_int32_t       area_id;
+  u_char          options[3]; /* OSPF Option including ExternalCapability */
+
+  list            if_list; /* OSPF interface to this area */
+
+  struct ospf6_lsdb *lsdb;
+
+  struct thread  *spf_calc;
+  struct thread  *route_calc;
+  int             stat_spf_execed;
+  int             stat_route_execed;
+
+  struct route_table *table; /* new route table */
+
+  struct prefix_ipv6 area_range;
+  struct ospf6_spftree *spf_tree;
+
+  struct ospf6_route_table *route_table;
+  struct ospf6_route_table *table_topology;
+
+  void (*foreach_if)  (struct ospf6_area *, void *, int,
+                       void (*func) (void *, int, void *));
+  void (*foreach_nei) (struct ospf6_area *, void *, int,
+                       void (*func) (void *, int, void *));
+
+  struct thread *maxage_remover;
+
+  struct thread *thread_router_lsa;
+};
+
+
+/* prototypes */
+
+int
+ospf6_area_count_neighbor_in_state (u_char state, struct ospf6_area *o6a);
+
+void
+ospf6_area_schedule_maxage_remover (void *arg, int val, void *obj);
+
+int ospf6_area_is_stub (struct ospf6_area *o6a);
+int ospf6_area_is_transit (struct ospf6_area *o6a);
+struct ospf6_area *ospf6_area_lookup (u_int32_t, struct ospf6 *);
+struct ospf6_area *ospf6_area_create (u_int32_t);
+void ospf6_area_delete (struct ospf6_area *);
+void ospf6_area_show (struct vty *, struct ospf6_area *);
+void
+ospf6_area_statistics_show (struct vty *vty, struct ospf6_area *o6a);
+
+void ospf6_area_init ();
+
+#endif /* OSPF_AREA_H */
+