BIER

- see draft-ietf-bier-mpls-encapsulation-10
- midpoint, head and tail functions
- supported payload protocols; IPv4 and IPv6 only.

Change-Id: I59d7363bb6fdfdce8e4016a68a9c8f5a5e5791cb
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 81 insertions, 0 deletions

diff --git a/src/vnet/bier/bier_disp_entry.h b/src/vnet/bier/bier_disp_entry.h
new file mode 100644
index 00000000000..34ca5d4a09a
--- /dev/null
+++ b/src/vnet/bier/bier_disp_entry.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * bier_dispositon : The BIER dispositon object
+ *
+ * A BIER dispositon object is used to pop the BIER header for for-us
+ * packets and steer the packet down the payload protocol specific graph
+ */
+
+#ifndef __BIER_DISP_ENTRY_H__
+#define __BIER_DISP_ENTRY_H__
+
+#include <vnet/bier/bier_types.h>
+#include <vnet/fib/fib_types.h>
+#include <vnet/dpo/dpo.h>
+
+/**
+ * The BIER dispositon object
+ */
+typedef struct bier_disp_entry_t_ {
+    /**
+     * The DPO contirubted from the per-payload protocol parents
+     * on cachline 1.
+     */
+    struct
+    {
+        dpo_id_t bde_dpo;
+        u32 bde_rpf_id;
+    } bde_fwd[BIER_HDR_N_PROTO];
+
+    /**
+     * number of locks
+     */
+    u32 bde_locks;
+
+    /**
+     * The path-lists used by per-payload protocol parents.
+     * We don't add the disp entry to the graph as a sibling
+     * since there is nothing we can do with the updates to
+     * forwarding.
+     */
+    fib_node_index_t bde_pl[BIER_HDR_N_PROTO];
+} bier_disp_entry_t;
+
+extern index_t bier_disp_entry_add_or_lock(void);
+extern void bier_disp_entry_path_add(index_t bdei,
+                                     bier_hdr_proto_id_t pproto,
+                                     const fib_route_path_t *rpaths);
+extern int bier_disp_entry_path_remove(index_t bdei,
+                                       bier_hdr_proto_id_t pproto,
+                                       const fib_route_path_t *rpaths);
+
+extern void bier_disp_entry_unlock(index_t bdi);
+extern void bier_disp_entry_lock(index_t bdi);
+
+extern u8* format_bier_disp_entry(u8* s, va_list *ap);
+
+extern void bier_disp_entry_contribute_forwarding(index_t bdi,
+                                                  dpo_id_t *dpo);
+
+extern bier_disp_entry_t *bier_disp_entry_pool;
+
+always_inline bier_disp_entry_t*
+bier_disp_entry_get (index_t bdi)
+{
+    return (pool_elt_at_index(bier_disp_entry_pool, bdi));
+}
+
+#endif