Initial revision
diff --git a/zebra/rtadv.h b/zebra/rtadv.h
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--- /dev/null
+++ b/zebra/rtadv.h
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+/* 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_RTADV_H
+#define _ZEBRA_RTADV_H
+
+/* Router advertisement prefix. */
+struct rtadv_prefix
+{
+  /* Prefix to be advertised. */
+  struct prefix prefix;
+  
+  /* The value to be placed in the Valid Lifetime in the Prefix */
+  u_int32_t AdvValidLifetime;
+#define RTADV_VALID_LIFETIME 2592000
+
+  /* The value to be placed in the on-link flag */
+  int AdvOnLinkFlag;
+
+  /* The value to be placed in the Preferred Lifetime in the Prefix
+     Information option, in seconds.*/
+  u_int32_t AdvPreferredLifetime;
+#define RTADV_PREFERRED_LIFETIME 604800
+
+  /* The value to be placed in the Autonomous Flag. */
+  int AdvAutonomousFlag;
+};
+
+void rtadv_config_write (struct vty *, struct interface *);
+
+#endif /* _ZEBRA_RTADV_H */