feat: boostrap hicn 22.02

The current patch provides several new features, improvements,
bug fixes and also complete rewrite of entire components.

- lib
The hicn packet parser has been improved with a new packet
format fully based on UDP. The TCP header is still temporarily
supported but the UDP header will replace completely the new hicn
packet format. Improvements have been made to make sure every
packet parsing operation is made via this library. The current
new header can be used as header between the payload and the
UDP header or as trailer in the UDP surplus area to be tested
when UDP options will start to be used.

- hicn-light
The portable packet forwarder has been completely rewritten from
scratch with the twofold objective to improve performance and
code size but  also to drop dependencies such as libparc which is
now removed by the current implementation.

- hicn control
the control library is the agent that is used to program the
packet forwarders via their binary API. This component has
benefited from significant improvements in terms of interaction
model which is now event driven and more robust to failures.

- VPP plugin has been updated to support VPP 22.02

- transport
Major improvement have been made to the RTC protocol, to the
support of IO modules and to the security sub system. Signed
manifests are the default data authenticity and integrity framework.
Confidentiality can be enabled by sharing the encryption key to the
prod/cons layer. The library has been tested with group key based
applications such as broadcast/multicast and real-time on-line
meetings with trusted server keys or MLS.

- testing
Unit testing has been introduced using GoogleTest. One third of
the code base is covered by unit testing with priority on
critical features. Functional testing has also been introduce
using Docker, linux bridging and Robot Framework to define
test with Less Code techniques to facilitate the extension
of the coverage.

Co-authored-by: Mauro Sardara <msardara@cisco.com>
Co-authored-by: Jordan Augé <jordan.auge+fdio@cisco.com>
Co-authored-by: Michele Papalini <micpapal@cisco.com>
Co-authored-by: Angelo Mantellini <manangel@cisco.com>
Co-authored-by: Jacques Samain <jsamain@cisco.com>
Co-authored-by: Olivier Roques <oroques+fdio@cisco.com>
Co-authored-by: Enrico Loparco <eloparco@cisco.com>
Co-authored-by: Giulio Grassi <gigrassi@cisco.com>

Change-Id: I75d0ef70f86d921e3ef503c99271216ff583c215
Signed-off-by: Luca Muscariello <muscariello@ieee.org>
Signed-off-by: Mauro Sardara <msardara@cisco.com>

1 files changed, 15 insertions, 53 deletions

diff --git a/hicn-plugin/src/mapme.h b/hicn-plugin/src/mapme.h
index 63bd42610..1d46ea9f3 100644
--- a/hicn-plugin/src/mapme.h
+++ b/hicn-plugin/src/mapme.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2020 Cisco and/or its affiliates.
+ * Copyright (c) 2021 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:
@@ -21,9 +21,9 @@
 #include <hicn/mapme.h>
 
 #include "hicn.h"
-#include "route.h"
 #include "strategy_dpo_ctx.h"
 #include "strategy_dpo_manager.h" // dpo_is_hicn
+#include "udp_tunnels/udp_tunnel.h"
 
 /**
  * @file
@@ -63,7 +63,6 @@ typedef struct hicn_mapme_conf_s
   bool remove_dpo; // FIXME used ?
 
   vlib_main_t *vm;
-  vlib_log_class_t log_class;
 } hicn_mapme_main_t;
 
 /**
@@ -100,65 +99,33 @@ STATIC_ASSERT (sizeof (hicn_mapme_tfib_t) <= sizeof (hicn_dpo_ctx_t),
 
 #define TFIB(dpo_ctx) ((hicn_mapme_tfib_t *) (dpo_ctx))
 
-static_always_inline int
-hicn_mapme_nh_set (hicn_mapme_tfib_t *tfib, hicn_face_id_t face_id)
-{
-  hicn_dpo_ctx_t *strategy_ctx = (hicn_dpo_ctx_t *) tfib;
-  const fib_prefix_t *prefix =
-    fib_entry_get_prefix (strategy_ctx->fib_entry_index);
-
-  u32 n_entries = tfib->entry_count;
-  /* Remove all the existing next hops and set the new one */
-  for (int i = 0; i < n_entries; i++)
-    {
-      hicn_face_t *face = hicn_dpoi_get_from_idx (strategy_ctx->next_hops[0]);
-      ip_adjacency_t *adj = adj_get (face->dpo.dpoi_index);
-      ip_nh_del_helper (face->dpo.dpoi_proto, prefix,
-			&adj->sub_type.nbr.next_hop, face->sw_if);
-    }
-  hicn_face_t *face = hicn_dpoi_get_from_idx (face_id);
-  ip_nh_add_helper (face->dpo.dpoi_proto, prefix, &face->nat_addr,
-		    face->sw_if);
-  return 0;
-}
-
 /**
- * @brief Add a next hop iif it is not already a next hops
+ * @brief Check whether a face is already included in the TFIB.
+ *
+ * NOTE: linear scan on a contiguous small array should be the most efficient.
  */
 static_always_inline int
-hicn_mapme_nh_add (hicn_mapme_tfib_t *tfib, hicn_face_id_t face_id)
+hicn_mapme_tfib_has (hicn_mapme_tfib_t *tfib, hicn_face_id_t face_id)
 {
-  for (u8 pos = 0; pos < tfib->entry_count; pos++)
-    if (tfib->next_hops[pos] == face_id)
-      return 0;
-
-  /* Add the next hop in the vrf 0 which will add it to the entry in the hICN
-   * vrf */
-  hicn_dpo_ctx_t *strategy_ctx = (hicn_dpo_ctx_t *) tfib;
-  const fib_prefix_t *prefix =
-    fib_entry_get_prefix (strategy_ctx->fib_entry_index);
-  hicn_face_t *face = hicn_dpoi_get_from_idx (face_id);
-  ip_nh_add_helper (face->dpo.dpoi_proto, prefix, &face->nat_addr,
-		    face->sw_if);
-
+  u8 pos = HICN_PARAM_FIB_ENTRY_NHOPS_MAX - tfib->tfib_entry_count;
+  for (u8 pos2 = pos; pos2 < HICN_PARAM_FIB_ENTRY_NHOPS_MAX; pos2++)
+    if (tfib->next_hops[pos2] == face_id)
+      return 1;
   return 0;
 }
 
 /**
  * Add a 'previous' hop to the TFIB
- *
- * XXX we should have the for look in the reverse order for simpler code.
  */
 static_always_inline int
 hicn_mapme_tfib_add (hicn_mapme_tfib_t *tfib, hicn_face_id_t face_id)
 {
-  u8 pos = HICN_PARAM_FIB_ENTRY_NHOPS_MAX - tfib->tfib_entry_count;
+  // Don't add if it already exists
+  // (eg. an old IU received on a face on which we are retransmitting)
+  if (hicn_mapme_tfib_has (tfib, face_id))
+    return 0;
 
-  // XXX don 't add if it already exist
-  // eg.an old IU received on a face on which we are retransmitting
-  for (u8 pos2 = pos; pos2 < HICN_PARAM_FIB_ENTRY_NHOPS_MAX; pos2++)
-    if (tfib->next_hops[pos2] == face_id)
-      return 0;
+  u8 pos = HICN_PARAM_FIB_ENTRY_NHOPS_MAX - tfib->tfib_entry_count;
 
   // Make sure we have enough room
   if (pos <= tfib->entry_count)
@@ -190,7 +157,6 @@ hicn_mapme_tfib_clear (hicn_mapme_tfib_t *tfib)
     {
       hicn_face_unlock_with_id (tfib->next_hops[pos]);
       tfib->next_hops[pos] = invalid;
-      break;
     }
 
   tfib->tfib_entry_count = 0;
@@ -358,10 +324,6 @@ hicn_mapme_get_dpo_face_node (hicn_face_id_t face_id)
     }
 }
 
-#define DEBUG(...) // vlib_log_debug(mapme_main.log_class, __VA_ARGS__)
-#define WARN(...)  // vlib_log_warn(mapme_main.log_class, __VA_ARGS__)
-#define ERROR(...) // vlib_log_err(mapme_main.log_class, __VA_ARGS__)
-
 #endif /* __HICN_MAPME__ */
 
 /*