IP Multicast FIB (mfib)

 - IPv[46] mfib tables with support for (*,G/m), (*,G) and (S,G) exact and longest prefix match
 - Replication represented via a new replicate DPO.
 - RPF configuration and data-plane checking
 - data-plane signals sent to listening control planes.

The functions of multicast forwarding entries differ from their unicast conterparts, so we introduce a new mfib_table_t and mfib_entry_t objects. However, we re-use the fib_path_list to resolve and build the entry's output list. the fib_path_list provides the service to construct a replicate DPO for multicast.

'make tests' is added to with two new suites; TEST=mfib, this is invocation of the CLI command 'test mfib' which deals with many path add/remove, flag set/unset scenarios, TEST=ip-mcast, data-plane forwarding tests.

Updated applications to use the new MIFB functions;
  - IPv6 NS/RA.
  - DHCPv6
 unit tests for these are undated accordingly.

Change-Id: I49ec37b01f1b170335a5697541c8fd30e6d3a961
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/vnet/fib/fib_table.h b/src/vnet/fib/fib_table.h
index cfec516de1a..e7e66acb773 100644
--- a/src/vnet/fib/fib_table.h
+++ b/src/vnet/fib/fib_table.h
@@ -729,4 +729,20 @@ extern u32 fib_table_get_num_entries(u32 fib_index,
 extern fib_table_t *fib_table_get(fib_node_index_t index,
 				  fib_protocol_t proto);
 
+/**
+ * @brief Call back function when walking entries in a FIB table
+ */
+typedef int (*fib_table_walk_fn_t)(fib_node_index_t fei,
+                                   void *ctx);
+
+/**
+ * @brief Walk all entries in a FIB table
+ * N.B: This is NOT safe to deletes. If you need to delete walk the whole
+ * table and store elements in a vector, then delete the elements
+ */
+extern void fib_table_walk(u32 fib_index,
+                           fib_protocol_t proto,
+                           fib_table_walk_fn_t fn,
+                           void *ctx);
+
 #endif