diff --git a/ospfclient/ospf_apiclient.h b/ospfclient/ospf_apiclient.h
new file mode 100644
index 0000000..0e74787
--- /dev/null
+++ b/ospfclient/ospf_apiclient.h
@@ -0,0 +1,135 @@
+/*
+ * Client side of OSPF API.
+ * Copyright (C) 2001, 2002, 2003 Ralph Keller
+ *
+ * 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_APICLIENT_H
+#define _OSPF_APICLIENT_H
+
+#define MTYPE_OSPF_APICLIENT 0
+
+/* Structure for the OSPF API client */
+struct ospf_apiclient
+{
+
+  /* Sockets for sync requests and async notifications */
+  int fd_sync;
+  int fd_async;
+
+  /* Pointer to callback functions */
+  void (*ready_notify) (u_char lsa_type, u_char opaque_type,
+			struct in_addr addr);
+  void (*new_if) (struct in_addr ifaddr, struct in_addr area_id);
+  void (*del_if) (struct in_addr ifaddr);
+  void (*ism_change) (struct in_addr ifaddr, struct in_addr area_id,
+		      u_char status);
+  void (*nsm_change) (struct in_addr ifaddr, struct in_addr nbraddr,
+		      struct in_addr router_id, u_char status);
+  void (*update_notify) (struct in_addr ifaddr, struct in_addr area_id,
+			 u_char self_origin,
+			 struct lsa_header * lsa);
+  void (*delete_notify) (struct in_addr ifaddr, struct in_addr area_id,
+			 u_char self_origin,
+			 struct lsa_header * lsa);
+};
+
+
+/* ---------------------------------------------------------
+ * API function prototypes.
+ * --------------------------------------------------------- */
+
+/* Open connection to OSPF daemon. Two ports will be allocated on
+   client, sync channel at syncport and reverse channel at syncport+1 */
+struct ospf_apiclient *ospf_apiclient_connect (char *host, int syncport);
+
+/* Shutdown connection to OSPF daemon. */
+int ospf_apiclient_close (struct ospf_apiclient *oclient);
+
+/* Synchronous request to register opaque type. */
+int ospf_apiclient_register_opaque_type (struct ospf_apiclient *oclient,
+					 u_char ltype, u_char otype);
+
+/* Synchronous request to register event mask. */
+int ospf_apiclient_register_events (struct ospf_apiclient *oclient,
+				    u_int32_t mask);
+
+/* Register callback functions.*/
+void ospf_apiclient_register_callback (struct ospf_apiclient *oclient,
+				       void (*ready_notify) (u_char lsa_type,
+							     u_char
+							     opaque_type,
+							     struct in_addr
+							     addr),
+				       void (*new_if) (struct in_addr ifaddr,
+						       struct in_addr
+						       area_id),
+				       void (*del_if) (struct in_addr ifaddr),
+				       void (*ism_change) (struct in_addr
+							   ifaddr,
+							   struct in_addr
+							   area_id,
+							   u_char status),
+				       void (*nsm_change) (struct in_addr
+							   ifaddr,
+							   struct in_addr
+							   nbraddr,
+							   struct in_addr
+							   router_id,
+							   u_char status),
+				       void (*update_notify) (struct in_addr
+							      ifaddr,
+							      struct in_addr
+							      area_id,
+							      u_char selforig,
+							      struct
+							      lsa_header *
+							      lsa),
+				       void (*delete_notify) (struct in_addr
+							      ifaddr,
+							      struct in_addr
+							      area_id,
+							      u_char selforig,
+							      struct
+							      lsa_header *
+							      lsa));
+
+/* Synchronous request to synchronize LSDB. */
+int ospf_apiclient_sync_lsdb (struct ospf_apiclient *oclient);
+
+/* Synchronous request to originate or update opaque LSA. */
+int
+ospf_apiclient_lsa_originate(struct ospf_apiclient *oclient,
+                             struct in_addr ifaddr,
+                             struct in_addr area_id,
+                             u_char lsa_type,
+                             u_char opaque_type, u_int32_t opaque_id,
+                             void *opaquedata, int opaquelen);
+
+
+/* Synchronous request to delete opaque LSA. Parameter opaque_id is in
+   host byte order */
+int ospf_apiclient_lsa_delete (struct ospf_apiclient *oclient,
+			       struct in_addr area_id, u_char lsa_type,
+			       u_char opaque_type, u_int32_t opaque_id);
+
+/* Fetch async message and handle it  */
+int ospf_apiclient_handle_async (struct ospf_apiclient *oclient);
+
+#endif /* _OSPF_APICLIENT_H */