diff --git a/ospfd/ospf_network.h b/ospfd/ospf_network.h
new file mode 100644
index 0000000..52a25fd
--- /dev/null
+++ b/ospfd/ospf_network.h
@@ -0,0 +1,34 @@
+/*
+ * OSPF network related functions.
+ *   Copyright (C) 1999 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_NETWORK_H
+#define _ZEBRA_OSPF_NETWORK_H
+
+/* Prototypes. */
+int ospf_if_add_allspfrouters (struct ospf *, struct prefix *, unsigned int);
+int ospf_if_drop_allspfrouters (struct ospf *, struct prefix *, unsigned int);
+int ospf_if_add_alldrouters (struct ospf *, struct prefix *, unsigned int);
+int ospf_if_drop_alldrouters (struct ospf *, struct prefix *, unsigned int);
+int ospf_if_ipmulticast (struct ospf *, struct prefix *, unsigned int);
+int ospf_sock_init (void);
+
+#endif /* _ZEBRA_OSPF_NETWORK_H */