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, 105 insertions, 36 deletions

diff --git a/hicn-plugin/src/strategy_node.c b/hicn-plugin/src/strategy_node.c
index ec57d76e2..66d9c2dbb 100644
--- a/hicn-plugin/src/strategy_node.c
+++ b/hicn-plugin/src/strategy_node.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2021 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:
@@ -25,6 +25,7 @@
 #include "mgmt.h"
 #include "pcs.h"
 #include "state.h"
+#include "data_fwd.h"
 #include "strategies/strategy_mw.h"
 
 /* Registration struct for a graph node */
@@ -65,7 +66,8 @@ hicn_new_interest (hicn_strategy_runtime_t *rt, vlib_buffer_t *b0, u32 *next,
 		   f64 tnow, u8 *nameptr, u16 namelen, hicn_face_id_t outface,
 		   int nh_idx, index_t dpo_ctx_id0,
 		   const hicn_strategy_vft_t *strategy, dpo_type_t dpo_type,
-		   u8 isv6, vl_api_hicn_api_node_stats_get_reply_t *stats)
+		   u8 isv6, vl_api_hicn_api_node_stats_get_reply_t *stats,
+		   u8 is_replication)
 {
   int ret;
   hicn_hash_node_t *nodep;
@@ -80,6 +82,17 @@ hicn_new_interest (hicn_strategy_runtime_t *rt, vlib_buffer_t *b0, u32 *next,
   u8 bucket_is_overflow = 0;
   u32 bucket_id = ~0;
 
+  if (is_replication)
+    {
+      // an entry for this message alredy exists in the PIT so just send it
+      *next = isv6 ? HICN_STRATEGY_NEXT_INTEREST_FACE6 :
+			   HICN_STRATEGY_NEXT_INTEREST_FACE4;
+
+      vnet_buffer (b0)->ip.adj_index[VLIB_TX] = outface;
+      stats->pkts_interest_count++;
+      return HICN_ERROR_NONE;
+    }
+
   /* Create PIT node and init PIT entry */
   nodep = hicn_hashtb_alloc_node (rt->pitcs->pcs_table);
   if (PREDICT_FALSE (nodep == NULL))
@@ -101,6 +114,7 @@ hicn_new_interest (hicn_strategy_runtime_t *rt, vlib_buffer_t *b0, u32 *next,
     {
       imsg_lifetime = sm->pit_lifetime_max_ms;
     }
+
   pitp->shared.expire_time = hicn_pcs_get_exp_time (tnow, imsg_lifetime);
 
   /* Set up the hash node and insert it */
@@ -121,7 +135,7 @@ hicn_new_interest (hicn_strategy_runtime_t *rt, vlib_buffer_t *b0, u32 *next,
       hicn_face_db_add_face (hicnb0->face_id, &(pitp->u.pit.faces));
 
       *next = isv6 ? HICN_STRATEGY_NEXT_INTEREST_FACE6 :
-		     HICN_STRATEGY_NEXT_INTEREST_FACE4;
+			   HICN_STRATEGY_NEXT_INTEREST_FACE4;
 
       vnet_buffer (b0)->ip.adj_index[VLIB_TX] = outface;
       stats->pkts_interest_count++;
@@ -137,9 +151,15 @@ hicn_new_interest (hicn_strategy_runtime_t *rt, vlib_buffer_t *b0, u32 *next,
 				     bucket_id, bucket_is_overflow);
 	  // We need to take a lock as the lock is not taken on the hash
 	  // entry because it is a CS entry (hash_insert function).
-	  hash_entry->locks++;
-	  *next = is_cs0 ? HICN_STRATEGY_NEXT_INTEREST_HITCS :
-			   HICN_STRATEGY_NEXT_INTEREST_HITPIT;
+	  if (is_cs0)
+	    {
+	      hash_entry->locks++;
+	      *next = HICN_STRATEGY_NEXT_INTEREST_HITCS;
+	    }
+	  else
+	    {
+	      *next = HICN_STRATEGY_NEXT_INTEREST_HITPIT;
+	    }
 	}
       else
 	{
@@ -189,7 +209,8 @@ hicn_strategy_fn (vlib_main_t *vm, vlib_node_runtime_t *node,
 	  hicn_header_t *hicn0;
 	  vlib_buffer_t *b0;
 	  u32 bi0;
-	  hicn_face_id_t outface;
+	  hicn_face_id_t outfaces[MAX_OUT_FACES];
+	  u32 outfaces_len;
 	  int nh_idx;
 	  u32 next0 = next_index;
 	  int ret;
@@ -207,15 +228,23 @@ hicn_strategy_fn (vlib_main_t *vm, vlib_node_runtime_t *node,
 	  bi0 = from[0];
 	  from += 1;
 	  n_left_from -= 1;
-	  to_next[0] = bi0;
-	  to_next += 1;
-	  n_left_to_next -= 1;
 
 	  b0 = vlib_get_buffer (vm, bi0);
 	  next0 = HICN_STRATEGY_NEXT_ERROR_DROP;
 
 	  hicn_dpo_ctx_t *dpo_ctx = hicn_strategy_dpo_ctx_get (
 	    vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
+
+	  if (PREDICT_FALSE (!dpo_ctx))
+	    {
+	      to_next[0] = bi0;
+	      to_next += 1;
+	      n_left_to_next -= 1;
+	      vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+					       n_left_to_next, bi0, next0);
+	      continue;
+	    }
+
 	  const hicn_strategy_vft_t *strategy =
 	    hicn_dpo_get_strategy_vft (dpo_ctx->dpo_type);
 
@@ -231,7 +260,7 @@ hicn_strategy_fn (vlib_main_t *vm, vlib_node_runtime_t *node,
 			    HICN_IS_NAMEHASH_CACHED (b0) &&
 			    strategy->hicn_select_next_hop (
 			      vnet_buffer (b0)->ip.adj_index[VLIB_TX], &nh_idx,
-			      &outface) == HICN_ERROR_NONE))
+			      outfaces, &outfaces_len) == HICN_ERROR_NONE))
 	    {
 	      /*
 	       * No need to check if parsing was successful
@@ -239,32 +268,72 @@ hicn_strategy_fn (vlib_main_t *vm, vlib_node_runtime_t *node,
 	       * node
 	       */
 	      nameptr = (u8 *) (&name);
-	      hicn_new_interest (rt, b0, &next0, tnow, nameptr, namelen,
-				 outface, nh_idx,
-				 vnet_buffer (b0)->ip.adj_index[VLIB_TX],
-				 strategy, dpo_ctx->dpo_type, isv6, &stats);
+	      u32 clones[outfaces_len];
+	      if (outfaces_len > 1)
+		{
+		  int ret = vlib_buffer_clone (vm, bi0, clones, outfaces_len,
+					       CLIB_CACHE_LINE_BYTES * 2);
+		  ASSERT (ret == outfaces_len);
+		}
+	      else
+		{
+		  clones[0] = bi0;
+		}
+
+	      for (u32 nh = 0; nh < outfaces_len; nh++)
+		{
+		  vlib_buffer_t *local_b0 = vlib_get_buffer (vm, clones[nh]);
+
+		  to_next[0] = clones[nh];
+		  to_next += 1;
+		  n_left_to_next -= 1;
+
+		  if (nh == 0)
+		    {
+		      // send first interest
+		      hicn_new_interest (
+			rt, local_b0, &next0, tnow, nameptr, namelen,
+			outfaces[nh], nh_idx,
+			vnet_buffer (local_b0)->ip.adj_index[VLIB_TX],
+			strategy, dpo_ctx->dpo_type, isv6, &stats, 0);
+		    }
+		  else
+		    {
+		      // send duplicated interests, avoid aggregation/drop
+		      hicn_new_interest (
+			rt, local_b0, &next0, tnow, nameptr, namelen,
+			outfaces[nh], nh_idx,
+			vnet_buffer (local_b0)->ip.adj_index[VLIB_TX],
+			strategy, dpo_ctx->dpo_type, isv6, &stats, 1);
+		    }
+
+		  /* Maybe trace */
+		  if (PREDICT_FALSE (
+			(node->flags & VLIB_NODE_FLAG_TRACE) &&
+			(local_b0->flags & VLIB_BUFFER_IS_TRACED)))
+		    {
+		      hicn_strategy_trace_t *t =
+			vlib_add_trace (vm, node, local_b0, sizeof (*t));
+		      t->pkt_type = HICN_PKT_TYPE_CONTENT;
+		      t->sw_if_index =
+			vnet_buffer (local_b0)->sw_if_index[VLIB_RX];
+		      t->next_index = next0;
+		      t->dpo_type = dpo_ctx->dpo_type;
+		    }
+
+		  /*
+		   * Verify speculative enqueue, maybe switch current
+		   * next frame
+		   */
+		  /*
+		   * Fix in case of a wrong speculation. Needed for
+		   * cloning the data in the right frame
+		   */
+		  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+						   to_next, n_left_to_next,
+						   clones[nh], next0);
+		}
 	    }
-	  /* Maybe trace */
-	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
-			     (b0->flags & VLIB_BUFFER_IS_TRACED)))
-	    {
-	      hicn_strategy_trace_t *t =
-		vlib_add_trace (vm, node, b0, sizeof (*t));
-	      t->pkt_type = HICN_PKT_TYPE_CONTENT;
-	      t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
-	      t->next_index = next0;
-	      t->dpo_type = dpo_ctx->dpo_type;
-	    }
-	  /*
-	   * Verify speculative enqueue, maybe switch current
-	   * next frame
-	   */
-	  /*
-	   * Fix in case of a wrong speculation. Needed for
-	   * cloning the data in the right frame
-	   */
-	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
-					   n_left_to_next, bi0, next0);
 	}
 
       vlib_put_next_frame (vm, node, next_index, n_left_to_next);