BIER in non-MPLS netowrks

as decsribed in section 2.2
  ihttps://tools.ietf.org/html/draft-ietf-bier-mpls-encapsulation-10
with BIFT encoding from:
  https://tools.ietf.org/html/draft-wijnandsxu-bier-non-mpls-bift-encoding-00

changes:
1 - introduce the new BIFT lookup table. BIER tables that have an associated
    MPLS label are added to the MPLS-FIB. Those that don't are added to the
    BIER table
2 - BIER routes that have no associated output MPLS label will add a BIFT label.
3 - The BIER FMask has a path-list as a member to resolve via any possible path.

Change-Id: I1fd4d9dbd074f0e855c16e9329b81460ebe1efce
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 38 insertions, 16 deletions

diff --git a/src/vnet/bier/bier_fmask_db.h b/src/vnet/bier/bier_fmask_db.h
index 6ba40f3a839..a7f29c2b6a6 100644
--- a/src/vnet/bier/bier_fmask_db.h
+++ b/src/vnet/bier/bier_fmask_db.h
@@ -21,18 +21,27 @@
 
 #include <vnet/ip/ip.h>
 
-#include <vnet/bier/bier_types.h>
+#include <vnet/fib/fib_types.h>
 
 /**
- * Foward declarations
+ * BIER header encapulsation types
  */
-struct bier_fmask_t_;
-
 typedef enum bier_hdr_type_t_ {
-    BIER_HDR_IN_IP6,
+    /**
+     * BIER Header in MPLS networks
+     */
     BIER_HDR_O_MPLS,
+
+    /**
+     * BIER header in non-MPLS networks
+     */
+    BIER_HDR_O_OTHER,
 } bier_hdr_type_t;
 
+/**
+ * A key/ID for a BIER forwarding Mas (FMask).
+ * This is a simplified version of a fib_route_path_t.
+ */
 typedef struct bier_fmask_id_t_ {
     /**
      * Type of BIER header this fmask supports
@@ -40,22 +49,35 @@ typedef struct bier_fmask_id_t_ {
     bier_hdr_type_t bfmi_hdr_type;
 
     /**
-     * next-hop of the peer
+     * The BIER table this fmask is in
+     */
+    index_t bfmi_bti;
+
+    union {
+        /**
+         * next-hop of the peer
+         */
+        ip46_address_t bfmi_nh;
+
+        /**
+         * ID of the next-hop object, e.g. a UDP-encap
+         */
+        u32 bfmi_id;
+    };
+
+    /**
+     * Software interface index
      */
-    ip46_address_t bfmi_nh;
-} bier_fmask_id_t;
+    u32 bfmi_sw_if_index;
+} __attribute__((packed)) bier_fmask_id_t;
 
-extern u32
+extern index_t
 bier_fmask_db_find_or_create_and_lock(index_t bti,
-                                      const bier_fmask_id_t *fmid,
                                       const fib_route_path_t *rpath);
+extern index_t bier_fmask_db_find (index_t bti,
+                                   const fib_route_path_t *rpath);
 
-extern u32
-bier_fmask_db_find(index_t bti,
-                   const bier_fmask_id_t *fmid);
+extern void bier_fmask_db_remove (const bier_fmask_id_t *fmid);
 
-extern void
-bier_fmask_db_remove(index_t bti,
-                     const bier_fmask_id_t *fmid);
 
 #endif