diff --git a/lib/sockopt.h b/lib/sockopt.h
new file mode 100644
index 0000000..7fb31c1
--- /dev/null
+++ b/lib/sockopt.h
@@ -0,0 +1,41 @@
+/* Router advertisement
+ * Copyright (C) 1999 Kunihiro Ishiguro
+ *
+ * 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_SOCKOPT_H
+#define _ZEBRA_SOCKOPT_H
+
+#ifdef HAVE_IPV6
+int setsockopt_ipv6_pktinfo (int, int);
+int setsockopt_ipv6_checksum (int, int);
+int setsockopt_ipv6_multicast_hops (int, int);
+int setsockopt_ipv6_unicast_hops (int, int);
+int setsockopt_ipv6_hoplimit (int, int);
+int setsockopt_ipv6_multicast_loop (int, int);
+#endif /* HAVE_IPV6 */
+
+int setsockopt_multicast_ipv4(int sock, 
+			     int optname, 
+			     struct in_addr if_addr,
+			     unsigned int mcast_addr,
+			     unsigned int ifindex);
+
+
+#endif /*_ZEBRA_SOCKOPT_H */