Merged own patch for the bug #391 (debugging and comments mostly).
diff --git a/zebra/rib.h b/zebra/rib.h
index 7b2bd42..796a30e 100644
--- a/zebra/rib.h
+++ b/zebra/rib.h
@@ -211,6 +211,15 @@
extern struct nexthop *nexthop_blackhole_add (struct rib *);
extern struct nexthop *nexthop_ipv4_add (struct rib *, struct in_addr *,
struct in_addr *);
+extern void rib_lookup_and_dump (struct prefix_ipv4 *);
+extern void rib_dump (const char *, const struct prefix_ipv4 *, const struct rib *);
+extern int rib_lookup_ipv4_route (struct prefix_ipv4 *, union sockunion *);
+#define ZEBRA_RIB_LOOKUP_ERROR -1
+#define ZEBRA_RIB_FOUND_EXACT 0
+#define ZEBRA_RIB_FOUND_NOGATE 1
+#define ZEBRA_RIB_FOUND_CONNECTED 2
+#define ZEBRA_RIB_NOTFOUND 3
+
#ifdef HAVE_IPV6
extern struct nexthop *nexthop_ipv6_add (struct rib *, struct in6_addr *);
#endif /* HAVE_IPV6 */