Ripngd part of 6Wind patch.
diff --git a/ripngd/ripng_nexthop.h b/ripngd/ripng_nexthop.h
new file mode 100644
index 0000000..5c778f5
--- /dev/null
+++ b/ripngd/ripng_nexthop.h
@@ -0,0 +1,62 @@
+/* RIPng nexthop support
+ * Copyright (C) 6WIND Vincent Jardin <vincent.jardin@6wind.com>
+ *
+ * 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_RIPNG_RIPNG_NEXTHOP_H
+#define _ZEBRA_RIPNG_RIPNG_NEXTHOP_H
+
+#include <zebra.h>
+#include "linklist.h"
+#include "ripngd/ripng_route.h"
+#include "ripngd/ripngd.h"
+
+struct list * ripng_rte_new(void);
+void ripng_rte_free(struct list *ripng_rte_list);
+void ripng_rte_add(struct list *ripng_rte_list, struct prefix_ipv6 *p,
+ struct ripng_info *rinfo, struct ripng_aggregate *aggregate);
+void ripng_rte_send(struct list *ripng_rte_list, struct interface *ifp,
+ struct sockaddr_in6 *to);
+
+/***
+ * 1 if A > B
+ * 0 if A = B
+ * -1 if A < B
+ **/
+static inline int
+addr6_cmp(struct in6_addr *A, struct in6_addr *B) {
+#define a(i) A->s6_addr32[i]
+#define b(i) B->s6_addr32[i]
+
+ if (a(3) > b(3))
+ return 1;
+ else if ((a(3) == b(3)) && (a(2) > b(2)))
+ return 1;
+ else if ((a(3) == b(3)) && (a(2) == b(2)) && (a(1) > b(1)))
+ return 1;
+ else if ((a(3) == b(3)) && (a(2) == b(2)) && (a(1) == b(1)) && (a(0) > b(0)))
+ return 1;
+
+ if ((a(3) == b(3)) && (a(2) == b(2)) && (a(1) == b(1)) && (a(0) == b(0)))
+ return 0;
+
+ return -1;
+}
+
+#endif /* _ZEBRA_RIPNG_RIPNG_NEXTHOP_H */