diff --git a/ospfd/ospf_opaque.h b/ospfd/ospf_opaque.h
new file mode 100644
index 0000000..9aa08e5
--- /dev/null
+++ b/ospfd/ospf_opaque.h
@@ -0,0 +1,155 @@
+/*
+ * This is an implementation of rfc2370.
+ * Copyright (C) 2001 KDD R&D Laboratories, Inc.
+ * http://www.kddlabs.co.jp/
+ *
+ * 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_OPAQUE_H
+#define _ZEBRA_OSPF_OPAQUE_H
+
+#define	IS_OPAQUE_LSA(type) \
+	((type) == OSPF_OPAQUE_LINK_LSA  || \
+	 (type) == OSPF_OPAQUE_AREA_LSA  || \
+	 (type) == OSPF_OPAQUE_AS_LSA)
+
+/*
+ * Usage of Opaque-LSA administrative flags in "struct ospf".
+ *
+ *    7   6   5   4   3   2   1   0
+ * +---+---+---+---+---+---+---+---+
+ * |///|///|///|///|B11|B10|B09| O |
+ * +---+---+---+---+---+---+---+---+
+ *                 |<--------->| A
+ *                       |       +--- Operation status (operational = 1)
+ *                       +----------- Blocking status for each LSA type
+ */
+
+#define IS_OPAQUE_LSA_ORIGINATION_BLOCKED(V) \
+        CHECK_FLAG((V), (OPAQUE_BLOCK_TYPE_09_LSA_BIT | \
+                         OPAQUE_BLOCK_TYPE_10_LSA_BIT | \
+                         OPAQUE_BLOCK_TYPE_11_LSA_BIT))
+
+/*
+ * Opaque LSA's link state ID is redefined as follows.
+ *
+ *        24       16        8        0
+ * +--------+--------+--------+--------+
+ * |tttttttt|........|........|........|
+ * +--------+--------+--------+--------+
+ * |<-Type->|<------- Opaque ID ------>|
+ */
+#define LSID_OPAQUE_TYPE_MASK	0xff000000	/*  8 bits */
+#define LSID_OPAQUE_ID_MASK	0x00ffffff	/* 24 bits */
+
+#define	GET_OPAQUE_TYPE(lsid) \
+	(((u_int32_t)(lsid) & LSID_OPAQUE_TYPE_MASK) >> 24)
+
+#define	GET_OPAQUE_ID(lsid) \
+	 ((u_int32_t)(lsid) & LSID_OPAQUE_ID_MASK)
+
+#define	SET_OPAQUE_LSID(type, id) \
+	((((type) << 24) & LSID_OPAQUE_TYPE_MASK) \
+	| ((id)          & LSID_OPAQUE_ID_MASK))
+
+/*
+ * Opaque LSA types will be assigned by IANA.
+ * <http://www.iana.org/assignments/ospf-opaque-types>
+ */
+#define OPAQUE_TYPE_TRAFFIC_ENGINEERING_LSA		1
+#define OPAQUE_TYPE_SYCAMORE_OPTICAL_TOPOLOGY_DESC	2
+#define OPAQUE_TYPE_GRACE_LSA				3
+
+/* Followings types are proposed in internet-draft documents. */
+#define OPAQUE_TYPE_8021_QOSPF				129
+#define OPAQUE_TYPE_SECONDARY_NEIGHBOR_DISCOVERY	224
+#define OPAQUE_TYPE_FLOODGATE                           225
+
+/* Ugly hack to make use of an unallocated value for wildcard matching! */
+#define OPAQUE_TYPE_WILDCARD				0
+
+#define OPAQUE_TYPE_RANGE_UNASSIGNED(type) \
+	(  4 <= (type) && (type) <= 127)
+
+#define OPAQUE_TYPE_RANGE_RESERVED(type) \
+	(127 <  (type) && (type) <= 255)
+
+#define VALID_OPAQUE_INFO_LEN(lsahdr) \
+	((ntohs((lsahdr)->length) >= sizeof (struct lsa_header)) && \
+	((ntohs((lsahdr)->length) %  sizeof (u_int32_t)) == 0))
+
+/* Prototypes. */
+struct vty;
+struct stream;
+
+extern void ospf_opaque_init (void);
+extern void ospf_opaque_term (void);
+extern int ospf_opaque_type9_lsa_init (struct ospf_interface *oi);
+extern void ospf_opaque_type9_lsa_term (struct ospf_interface *oi);
+extern int ospf_opaque_type10_lsa_init (struct ospf_area *area);
+extern void ospf_opaque_type10_lsa_term (struct ospf_area *area);
+extern int ospf_opaque_type11_lsa_init (struct ospf *ospf);
+extern void ospf_opaque_type11_lsa_term (struct ospf *ospf);
+
+extern int
+ospf_register_opaque_functab (
+  u_char lsa_type,
+  u_char opaque_type,
+  int (* new_if_hook)(struct interface *ifp),
+  int (* del_if_hook)(struct interface *ifp),
+  void (* ism_change_hook)(struct ospf_interface *oi, int old_status),
+  void (* nsm_change_hook)(struct ospf_neighbor *nbr, int old_status),
+  void (* config_write_router)(struct vty *vty),
+  void (* config_write_if    )(struct vty *vty, struct interface *ifp),
+  void (* config_write_debug )(struct vty *vty),
+  void (* show_opaque_info   )(struct vty *vty, struct ospf_lsa *lsa),
+  int  (* lsa_originator)(void *arg),
+  void (* lsa_refresher )(struct ospf_lsa *lsa),
+  int (* new_lsa_hook)(struct ospf_lsa *lsa),
+  int (* del_lsa_hook)(struct ospf_lsa *lsa)
+);
+extern void ospf_delete_opaque_functab (u_char lsa_type, u_char opaque_type);
+
+extern int ospf_opaque_new_if (struct interface *ifp);
+extern int ospf_opaque_del_if (struct interface *ifp);
+extern void ospf_opaque_ism_change (struct ospf_interface *oi, int old_status);
+extern void ospf_opaque_nsm_change (struct ospf_neighbor *nbr, int old_status);
+extern void ospf_opaque_config_write_router (struct vty *vty, struct ospf *);
+extern void ospf_opaque_config_write_if (struct vty *vty, struct interface *ifp);
+extern void ospf_opaque_config_write_debug (struct vty *vty);
+extern void show_opaque_info_detail (struct vty *vty, struct ospf_lsa *lsa);
+extern void ospf_opaque_lsa_dump (struct stream *s, u_int16_t length);
+
+extern void ospf_opaque_lsa_originate_schedule (struct ospf_interface *oi, int *init_delay);
+extern struct ospf_lsa *ospf_opaque_lsa_install (struct ospf_lsa *new, int rt_recalc);
+extern void ospf_opaque_lsa_refresh (struct ospf_lsa *lsa);
+
+extern void ospf_opaque_lsa_reoriginate_schedule (void *lsa_type_dependent, u_char lsa_type, u_char opaque_type);
+extern void ospf_opaque_lsa_refresh_schedule (struct ospf_lsa *lsa);
+extern void ospf_opaque_lsa_flush_schedule (struct ospf_lsa *lsa);
+
+extern void ospf_opaque_adjust_lsreq (struct ospf_neighbor *nbr, list lsas);
+extern void ospf_opaque_self_originated_lsa_received (struct ospf_neighbor *nbr, list lsas);
+extern void ospf_opaque_ls_ack_received (struct ospf_neighbor *nbr, list acks);
+
+extern void htonf (float *src, float *dst);
+extern void ntohf (float *src, float *dst);
+extern struct ospf *oi_to_top (struct ospf_interface *oi);
+
+#endif /* _ZEBRA_OSPF_OPAQUE_H */