diff --git a/ospfd/ospf_asbr.h b/ospfd/ospf_asbr.h
new file mode 100644
index 0000000..f368246
--- /dev/null
+++ b/ospfd/ospf_asbr.h
@@ -0,0 +1,75 @@
+/*
+ * OSPF AS Boundary Router functions.
+ * Copyright (C) 1999, 2000 Kunihiro Ishiguro, Toshiaki Takada
+ *
+ * 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 _ZEBRA_OSPF_ASBR_H
+#define _ZEBRA_OSPF_ASBR_H
+
+struct route_map_set_values
+{
+  int32_t metric;
+  int32_t metric_type;
+};
+
+/* Redistributed external information. */
+struct external_info
+{
+  /* Type of source protocol. */
+  u_char type;
+
+  /* Prefix. */
+  struct prefix_ipv4 p;
+
+  /* Interface index. */
+  unsigned int ifindex;
+
+  /* Nexthop address. */
+  struct in_addr nexthop;
+
+  /* Additional Route tag. */
+  u_int32_t tag;
+
+  struct route_map_set_values route_map_set;
+#define ROUTEMAP_METRIC(E)      (E)->route_map_set.metric
+#define ROUTEMAP_METRIC_TYPE(E) (E)->route_map_set.metric_type
+};
+
+#define OSPF_ASBR_CHECK_DELAY 30
+
+void ospf_external_route_remove (struct prefix_ipv4 *p);
+struct external_info *ospf_external_info_new (u_char);
+void ospf_reset_route_map_set_values (struct route_map_set_values *values);
+int ospf_route_map_set_compare (struct route_map_set_values *values1,
+				struct route_map_set_values *values2);
+struct external_info *ospf_external_info_add (u_char, struct prefix_ipv4,
+					      unsigned int, struct in_addr);
+void ospf_external_info_delete (u_char, struct prefix_ipv4);
+struct external_info *ospf_external_info_lookup (u_char, struct prefix_ipv4 *);
+
+void ospf_asbr_status_update (u_char);
+
+void ospf_redistribute_withdraw (u_char);
+void ospf_asbr_check ();
+void ospf_schedule_asbr_check ();
+void ospf_asbr_route_install_lsa (struct ospf_lsa *);
+struct ospf_lsa *ospf_external_info_find_lsa (struct prefix_ipv4 *p);
+
+#endif /* _ZEBRA_OSPF_ASBR_H */