Python test IP and MPLS objects conform to infra.
Add IP[46] MFIB dump.

Change-Id: I4a2821f65e67a5416b291e4912c84f64989883b8
Signed-off-by: Neale Ranns <nranns@cisco.com>
diff --git a/src/vnet/mfib/ip4_mfib.h b/src/vnet/mfib/ip4_mfib.h
index 6fc74a3..ea68265 100644
--- a/src/vnet/mfib/ip4_mfib.h
+++ b/src/vnet/mfib/ip4_mfib.h
@@ -90,6 +90,15 @@
 
 extern u32 ip4_mfib_table_get_index_for_sw_if_index(u32 sw_if_index);
 
+/**
+ * @brief Walk the IP4 mfib table.
+ *
+ * @param mfib the table to walk
+ * @param fn The function to invoke on each entry visited
+ * @param ctx A context passed in the visit function
+ */
+extern void ip4_mfib_table_walk (ip4_mfib_t *mfib,
+                                 mfib_table_walk_fn_t fn,
+                                 void *ctx);
 
 #endif
-