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, 41 insertions, 20 deletions

diff --git a/src/vnet/bier/bier_api.c b/src/vnet/bier/bier_api.c
index cd1f40b1eaa..67c70462540 100644
--- a/src/vnet/bier/bier_api.c
+++ b/src/vnet/bier/bier_api.c
@@ -83,7 +83,17 @@ vl_api_bier_table_add_del_t_handler (vl_api_bier_table_add_del_t * mp)
 
     if (mp->bt_is_add)
     {
-        bier_table_add_or_lock(&bti, ntohl(mp->bt_label));
+        mpls_label_t label = ntohl(mp->bt_label);
+
+        /*
+         * convert acceptable 'don't want a label' values from 
+         * the API to the correct internal INVLID value
+         */
+        if ((0 == label) || (~0 == label))
+        {
+            label = MPLS_LABEL_INVALID;
+        }
+        bier_table_add_or_lock(&bti, label);
     }
     else
     {
@@ -175,7 +185,7 @@ vl_api_bier_route_add_del_t_handler (vl_api_bier_route_add_del_t * mp)
     {
         brpath = &brpaths[ii];
         memset(brpath, 0, sizeof(*brpath));
-        brpath->frp_flags = FIB_ROUTE_PATH_BIER_FMASK;
+        brpath->frp_sw_if_index = ~0;
 
         vec_validate(brpath->frp_label_stack,
                      mp->br_paths[ii].n_labels - 1);
@@ -185,30 +195,41 @@ vl_api_bier_route_add_del_t_handler (vl_api_bier_route_add_del_t * mp)
                 ntohl(mp->br_paths[ii].label_stack[jj]);
         }
 
-        if (0 == mp->br_paths[ii].afi)
+        if (mp->br_paths[ii].is_udp_encap)
         {
-            clib_memcpy (&brpath->frp_addr.ip4,
-                         mp->br_paths[ii].next_hop,
-                         sizeof (brpath->frp_addr.ip4));
+            brpath->frp_flags |= FIB_ROUTE_PATH_UDP_ENCAP;
+            brpath->frp_udp_encap_id = ntohl(mp->br_paths[ii].next_hop_id);
         }
         else
         {
-            clib_memcpy (&brpath->frp_addr.ip6,
-                         mp->br_paths[ii].next_hop,
-                         sizeof (brpath->frp_addr.ip6));
-        }
-        if (ip46_address_is_zero(&brpath->frp_addr))
-        {
-            index_t bdti;
-
-            bdti = bier_disp_table_find(ntohl(mp->br_paths[ii].table_id));
-
-            if (INDEX_INVALID != bdti)
-                brpath->frp_fib_index = bdti;
+            if (0 == mp->br_paths[ii].afi)
+            {
+                clib_memcpy (&brpath->frp_addr.ip4,
+                             mp->br_paths[ii].next_hop,
+                             sizeof (brpath->frp_addr.ip4));
+            }
             else
             {
-                rv = VNET_API_ERROR_NO_SUCH_FIB;
-                goto done;
+                clib_memcpy (&brpath->frp_addr.ip6,
+                             mp->br_paths[ii].next_hop,
+                             sizeof (brpath->frp_addr.ip6));
+            }
+            if (ip46_address_is_zero(&brpath->frp_addr))
+            {
+                index_t bdti;
+
+                bdti = bier_disp_table_find(ntohl(mp->br_paths[ii].table_id));
+
+                if (INDEX_INVALID != bdti)
+                {
+                    brpath->frp_fib_index = bdti;
+                    brpath->frp_proto = DPO_PROTO_BIER;
+                }
+                else
+                {
+                    rv = VNET_API_ERROR_NO_SUCH_FIB;
+                    goto done;
+                }
             }
         }
     }