diff --git a/ospf6d/ospf6_abr.h b/ospf6d/ospf6_abr.h
new file mode 100644
index 0000000..510532e
--- /dev/null
+++ b/ospf6d/ospf6_abr.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2001 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_ABR_H
+#define OSPF6_ABR_H
+
+/* Inter-Area-Prefix-LSA */
+struct ospf6_inter_area_prefix_lsa
+{
+  u_int32_t metric;           /* 12bits reserved, 20bits metric */
+  struct ospf6_prefix prefix; /* followed by one address prefix */
+};
+
+/* Inter-Area-Router-LSA */
+struct ospf6_inter_area_router_lsa
+{
+  u_char reserved;
+  u_char options[3];      /* Optional Capability */
+  u_int32_t metric;       /* 12bits reserved, 20bits metric */
+  u_int32_t router_id;    /* Destination Router ID */
+};
+
+void ospf6_abr_prefix_lsa_add (struct ospf6_lsa *);
+void ospf6_abr_prefix_lsa_remove (struct ospf6_lsa *);
+void ospf6_abr_prefix_lsa_change (struct ospf6_lsa *, struct ospf6_lsa *);
+
+void ospf6_abr_abr_entry_add (struct ospf6_route_req *);
+void ospf6_abr_abr_entry_remove (struct ospf6_route_req *);
+
+void ospf6_abr_route_add (struct ospf6_route_req *);
+void ospf6_abr_route_remove (struct ospf6_route_req *);
+
+void ospf6_abr_inter_route_calculation (struct ospf6_area *);
+
+void ospf6_abr_init ();
+
+#endif /* OSPF6_ABR_H */
+