DVR: run L3 output features

- rename l2_bridged to is_dvr. Including on the ip.api
    this was new in the 18.01 release so no compatability issues.
- steal the free space in vnet_buffer_opaque_t for use with flags.
- run the ipX-output feature arc from the DVR DPO

Change-Id: I040e5976d1dbe076fcdda3a40a7804f56337ce3f
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 65 insertions, 0 deletions

diff --git a/src/vnet/dpo/dvr_dpo.h b/src/vnet/dpo/dvr_dpo.h
new file mode 100644
index 00000000000..15fe113c596
--- /dev/null
+++ b/src/vnet/dpo/dvr_dpo.h
@@ -0,0 +1,65 @@
+/*
+ * 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.
+ */
+
+#ifndef __DVR_DPO_H__
+#define __DVR_DPO_H__
+
+#include <vnet/dpo/dpo.h>
+
+/**
+ * @brief
+ * The DVR DPO. Used as the resolving object for a DVR route.
+ * This is used, in place of the usual L3 Adjacency, to retransmit
+ * the packet with the original L2 header intact but also to run L3 features.
+ * After running L3 features the packet is re-injected back into the L2 path
+ * so it can pick up the necessary VLAN tags of the egress interface.
+ * This re-injection is done with an output feature.
+ */
+typedef struct dvr_dpo_t_
+{
+    /**
+     * The Software interface index that the packets will output on
+     */
+    u32 dd_sw_if_index;
+
+    /**
+     * The protocol of packets using this DPO
+     */
+    dpo_proto_t dd_proto;
+
+    /**
+     * number of locks.
+     */
+    u16 dd_locks;
+} dvr_dpo_t;
+
+extern void dvr_dpo_add_or_lock (u32 sw_if_index,
+                                 dpo_proto_t dproto,
+                                 dpo_id_t *dpo);
+
+extern void dvr_dpo_module_init(void);
+
+/**
+ * @brief pool of all interface DPOs
+ */
+dvr_dpo_t *dvr_dpo_pool;
+
+static inline dvr_dpo_t *
+dvr_dpo_get (index_t index)
+{
+    return (pool_elt_at_index(dvr_dpo_pool, index));
+}
+
+#endif