IP6 link-local table

- IPv6 link local table is a per-SW interface array of IPv6 unicast FIBs
- the per-interface ocst is sizeof(fib_table_t) which is small,
  w.r.t. the cost of an interface
- FE80::/10 in the 'global' table points to a DPO that performs a lookup in the
  input interface's LL fib.

Change-Id: Ice834b25ebeeacb2e929d7c864d7ec8c09918cbe
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/src/vnet/fib/fib_table.h b/src/vnet/fib/fib_table.h
index 14ac7054059..ddc00e537c2 100644
--- a/src/vnet/fib/fib_table.h
+++ b/src/vnet/fib/fib_table.h
@@ -29,6 +29,40 @@
 #define FIB_TABLE_TOTAL_LOCKS FIB_SOURCE_MAX
 
 /**
+ * Flags for the source data
+ */
+typedef enum fib_table_attribute_t_ {
+    /**
+     * Marker. Add new values after this one.
+     */
+    FIB_TABLE_ATTRIBUTE_FIRST,
+    /**
+     * the table is for IP6 link local addresses
+     */
+    FIB_TABLE_ATTRIBUTE_IP6_LL = FIB_TABLE_ATTRIBUTE_FIRST,
+    /**
+     * Marker. add new entries before this one.
+     */
+    FIB_TABLE_ATTRIBUTE_LAST = FIB_TABLE_ATTRIBUTE_IP6_LL,
+} fib_table_attribute_t;
+
+#define FIB_TABLE_ATTRIBUTE_MAX (FIB_TABLE_ATTRIBUTE_LAST+1)
+
+#define FIB_TABLE_ATTRIBUTES {		         \
+    [FIB_TABLE_ATTRIBUTE_IP6_LL]  = "ip6-ll",	 \
+}
+
+#define FOR_EACH_FIB_TABLE_ATTRIBUTE(_item)      	\
+    for (_item = FIB_TABLE_ATTRIBUTE_FIRST;		\
+	 _item < FIB_TABLE_ATTRIBUTE_MAX;		\
+	 _item++)
+
+typedef enum fib_table_flags_t_ {
+    FIB_TABLE_FLAG_NONE   = 0,
+    FIB_TABLE_FLAG_IP6_LL  = (1 << FIB_TABLE_ATTRIBUTE_IP6_LL),
+} __attribute__ ((packed)) fib_table_flags_t;
+
+/**
  * @brief 
  *   A protocol Independent FIB table
  */
@@ -40,6 +74,11 @@ typedef struct fib_table_t_
     fib_protocol_t ft_proto;
 
     /**
+     * Table flags
+     */
+    fib_table_flags_t ft_flags;
+
+    /**
      * per-source number of locks on the table
      */
     u16 ft_locks[FIB_TABLE_N_LOCKS];