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>

13 files changed, 537 insertions, 22 deletions

diff --git a/hicn-plugin/src/strategies/dpo_mw.c b/hicn-plugin/src/strategies/dpo_mw.c
index 70ef7d7c9..1a7d2e495 100644
--- a/hicn-plugin/src/strategies/dpo_mw.c
+++ b/hicn-plugin/src/strategies/dpo_mw.c
@@ -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:
@@ -28,6 +28,7 @@ static const hicn_dpo_vft_t hicn_dpo_mw_vft = {
   .hicn_dpo_get_type = &hicn_dpo_strategy_mw_get_type,
   .hicn_dpo_module_init = &hicn_dpo_strategy_mw_module_init,
   .hicn_dpo_create = &hicn_strategy_mw_ctx_create,
+  .hicn_dpo_update_type = &hicn_strategy_mw_update_ctx_type,
   .hicn_dpo_add_update_nh = &hicn_strategy_mw_ctx_add_nh,
   .hicn_dpo_del_nh = &hicn_strategy_mw_ctx_del_nh,
   .hicn_dpo_format = &hicn_strategy_mw_format_ctx
@@ -117,8 +118,22 @@ hicn_strategy_mw_ctx_create (fib_protocol_t proto,
 
   *dpo_idx = hicn_strategy_dpo_ctx_get_index (hicn_strategy_ctx);
 
-  init_dpo_ctx (hicn_strategy_ctx, next_hop, nh_len, hicn_dpo_type_mw, proto);
+  HICN_DEBUG ("Successful hicn_strategy_dpo_ctx_alloc with index %d",
+	      *dpo_idx);
 
+  init_dpo_ctx (hicn_strategy_ctx, next_hop, nh_len, hicn_dpo_type_mw,
+		(dpo_proto_t) proto);
+
+  memset (hicn_strategy_mw_ctx->weight, 0, HICN_PARAM_FIB_ENTRY_NHOPS_MAX);
+}
+
+void
+hicn_strategy_mw_update_ctx_type (hicn_dpo_ctx_t *hicn_strategy_ctx)
+{
+  hicn_strategy_mw_ctx_t *hicn_strategy_mw_ctx;
+  hicn_strategy_mw_ctx = (hicn_strategy_mw_ctx_t *) hicn_strategy_ctx->data;
+
+  hicn_strategy_ctx->dpo_type = hicn_dpo_type_mw;
   memset (hicn_strategy_mw_ctx->weight, 0, HICN_PARAM_FIB_ENTRY_NHOPS_MAX);
 }
 
diff --git a/hicn-plugin/src/strategies/dpo_mw.h b/hicn-plugin/src/strategies/dpo_mw.h
index 1a174631a..d2807d1a5 100644
--- a/hicn-plugin/src/strategies/dpo_mw.h
+++ b/hicn-plugin/src/strategies/dpo_mw.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:
@@ -72,6 +72,13 @@ void hicn_strategy_mw_ctx_create (fib_protocol_t proto,
 				  index_t *dpo_idx);
 
 /**
+ * @brief Update existing ctx setting it to mw
+ *
+ * @param hicn_strategy_ctx pointer to the ctx to update
+ */
+void hicn_strategy_mw_update_ctx_type (hicn_dpo_ctx_t *hicn_strategy_ctx);
+
+/**
  * @brief Add or update a next hop in the dpo ctx.
  *
  * This function is meant to be used in the control plane and not in the data
diff --git a/hicn-plugin/src/strategies/dpo_rp.c b/hicn-plugin/src/strategies/dpo_rp.c
new file mode 100644
index 000000000..7f527cdb6
--- /dev/null
+++ b/hicn-plugin/src/strategies/dpo_rp.c
@@ -0,0 +1,155 @@
+/*
+ * 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:
+ *
+ *     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.
+ */
+
+#include "dpo_rp.h"
+#include "strategy_rp.h"
+#include "../strategy_dpo_manager.h"
+#include "../strategy_dpo_ctx.h"
+
+/**
+ * @brief DPO type value for the rp_strategy
+ */
+static dpo_type_t hicn_dpo_type_rp;
+
+static const hicn_dpo_vft_t hicn_dpo_rp_vft = {
+  .hicn_dpo_is_type = &hicn_dpo_is_type_strategy_rp,
+  .hicn_dpo_get_type = &hicn_dpo_strategy_rp_get_type,
+  .hicn_dpo_module_init = &hicn_dpo_strategy_rp_module_init,
+  .hicn_dpo_create = &hicn_strategy_rp_ctx_create,
+  .hicn_dpo_update_type = &hicn_strategy_rp_update_ctx_type,
+  .hicn_dpo_add_update_nh = &hicn_strategy_rp_ctx_add_nh,
+  .hicn_dpo_del_nh = &hicn_strategy_rp_ctx_del_nh,
+  .hicn_dpo_format = &hicn_strategy_rp_format_ctx
+};
+
+int
+hicn_dpo_is_type_strategy_rp (const dpo_id_t *dpo)
+{
+  return dpo->dpoi_type == hicn_dpo_type_rp;
+}
+
+void
+hicn_dpo_strategy_rp_module_init (void)
+{
+  /*
+   * Register our type of dpo
+   */
+  hicn_dpo_type_rp = hicn_dpo_register_new_type (
+    hicn_nodes_strategy, &hicn_dpo_rp_vft, hicn_rp_strategy_get_vft (),
+    &dpo_strategy_rp_ctx_vft);
+}
+
+dpo_type_t
+hicn_dpo_strategy_rp_get_type (void)
+{
+  return hicn_dpo_type_rp;
+}
+
+//////////////////////////////////////////////////////////////////////////////////////////////////
+
+u8 *
+hicn_strategy_rp_format_ctx (u8 *s, int n, ...)
+{
+  va_list args;
+  va_start (args, n);
+  s = format_hicn_strategy_rp_ctx (s, &args);
+  return s;
+}
+
+u8 *
+format_hicn_strategy_rp_ctx (u8 *s, va_list *ap)
+{
+  int i = 0;
+  index_t index = va_arg (*ap, index_t);
+  hicn_dpo_ctx_t *dpo_ctx = NULL;
+  u32 indent = va_arg (*ap, u32);
+
+  dpo_ctx = hicn_strategy_dpo_ctx_get (index);
+  if (dpo_ctx == NULL)
+    return s;
+
+  for (i = 0; i < HICN_PARAM_FIB_ENTRY_NHOPS_MAX; i++)
+    {
+      u8 *buf = NULL;
+      if (i < dpo_ctx->entry_count)
+	buf = format (NULL, "FIB");
+      else if (i >= HICN_PARAM_FIB_ENTRY_NHOPS_MAX - dpo_ctx->tfib_entry_count)
+	buf = format (NULL, "TFIB");
+      else
+	continue;
+
+      s = format (s, "\n");
+      s = format (s, "%U ", format_hicn_face, dpo_ctx->next_hops[i], indent);
+      s = format (s, " %s", buf);
+    }
+
+  return (s);
+}
+
+void
+hicn_strategy_rp_ctx_create (fib_protocol_t proto,
+			     const hicn_face_id_t *next_hop, int nh_len,
+			     index_t *dpo_idx)
+{
+  hicn_dpo_ctx_t *hicn_strategy_ctx;
+
+  /* Allocate a hicn_dpo_ctx on the vpp pool and initialize it */
+  hicn_strategy_ctx = hicn_strategy_dpo_ctx_alloc ();
+
+  *dpo_idx = hicn_strategy_dpo_ctx_get_index (hicn_strategy_ctx);
+
+  init_dpo_ctx (hicn_strategy_ctx, next_hop, nh_len, hicn_dpo_type_rp,
+		(dpo_proto_t) proto);
+}
+
+void
+hicn_strategy_rp_update_ctx_type (hicn_dpo_ctx_t *hicn_strategy_ctx)
+{
+  hicn_strategy_ctx->dpo_type = hicn_dpo_type_rp;
+  // don't care to reset data, it is not used
+}
+
+int
+hicn_strategy_rp_ctx_add_nh (hicn_face_id_t nh, index_t dpo_idx)
+{
+  hicn_dpo_ctx_t *hicn_strategy_dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
+  u8 pos = 0;
+
+  if (hicn_strategy_dpo_ctx == NULL)
+    {
+      return HICN_ERROR_STRATEGY_NOT_FOUND;
+    }
+
+  hicn_strategy_dpo_ctx_add_nh (nh, hicn_strategy_dpo_ctx, &pos);
+  // nothing else to initialize in this strategy
+  return HICN_ERROR_NONE;
+}
+
+int
+hicn_strategy_rp_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx)
+{
+  hicn_dpo_ctx_t *hicn_strategy_dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
+  // No need to change the current_nhop. It will be updated at the next
+  // selection.
+  return hicn_strategy_dpo_ctx_del_nh (face_id, hicn_strategy_dpo_ctx);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/hicn-plugin/src/strategies/dpo_rp.h b/hicn-plugin/src/strategies/dpo_rp.h
new file mode 100644
index 000000000..4fe645add
--- /dev/null
+++ b/hicn-plugin/src/strategies/dpo_rp.h
@@ -0,0 +1,152 @@
+/*
+ * 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:
+ *
+ *     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 __HICN_DPO_RP_H__
+#define __HICN_DPO_RP_H__
+
+#include <vnet/dpo/dpo.h>
+#include "../strategy_dpo_ctx.h"
+
+/**
+ * @file dpo_rp.h
+ *
+ * This file implements the strategy vtf (see strategy.h) and
+ * the dpo vft (see strategy_dpo_manager.h) for the strategy
+ * replication.
+ */
+
+typedef struct hicn_strategy_rp_ctx_s
+{
+} hicn_strategy_rp_ctx_t;
+
+/**
+ * @brief Format the dpo ctx for a human-readable string
+ *
+ * @param s String to which to append the formatted dpo ctx
+ * @param ap List of parameters for the formatting
+ *
+ * @result The string with the formatted dpo ctx
+ */
+u8 *format_hicn_strategy_rp_ctx (u8 *s, va_list *ap);
+
+const static dpo_vft_t dpo_strategy_rp_ctx_vft = {
+  .dv_lock = hicn_strategy_dpo_ctx_lock,
+  .dv_unlock = hicn_strategy_dpo_ctx_unlock,
+  .dv_format = format_hicn_strategy_rp_ctx,
+};
+
+/**
+ * @brief Retrieve an hicn_strategy_rp_ctx object
+ *
+ * @param indext Index of the hicn_dpo_ctx to retrieve
+ * @return The hicn_dpo_ctx object or NULL
+ */
+hicn_dpo_ctx_t *hicn_strategy_rp_ctx_get (index_t index);
+
+/**
+ * @brief Create a new replication ctx
+ *
+ * @param proto The protocol to which the dpo is meant for (see vpp docs)
+ * @param next_hop A list of next hops to be inserted in the dpo ctx
+ * @param nh_len Size of the list
+ * @param dpo_idx index_t that will hold the index of the created dpo ctx
+ * @return HICN_ERROR_NONE if the creation was fine, otherwise EINVAL
+ */
+void hicn_strategy_rp_ctx_create (fib_protocol_t proto,
+				  const hicn_face_id_t *next_hop, int nh_len,
+				  index_t *dpo_idx);
+
+/**
+ * @brief Update existing ctx setting it to rp
+ *
+ * @param hicn_strategy_ctx pointer to the ctx to update
+ */
+void hicn_strategy_rp_update_ctx_type (hicn_dpo_ctx_t *hicn_strategy_ctx);
+
+/**
+ * @brief Add or update a next hop in the dpo ctx.
+ *
+ * This function is meant to be used in the control plane and not in the data
+ * plane, as it is not optimized for the latter.
+ *
+ * @param nh Next hop to insert in the dpo ctx
+ * @param dpo_idx Index of the dpo ctx to update with the new or updated next
+ * hop
+ * @return HICN_ERROR_NONE if the update or insert was fine,
+ * otherwise HICN_ERROR_DPO_CTX_NOT_FOUND
+ */
+int hicn_strategy_rp_ctx_add_nh (hicn_face_id_t nh, index_t dpo_idx);
+
+/**
+ * @brief Delete a next hop in the dpo ctx.
+ *
+ * @param face_id Face identifier of the next hop
+ * @param dpo_idx Index of the dpo ctx to update with the new or updated next
+ * hop
+ * @return HICN_ERROR_NONE if the update or insert was fine,
+ * otherwise HICN_ERROR_DPO_CTS_NOT_FOUND
+ */
+int hicn_strategy_rp_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx);
+
+/**
+ * @brief Prefetch a dpo
+ *
+ * @param dpo_idx Index of the dpo ctx to prefetch
+ */
+void hicn_strategy_rp_ctx_prefetch (index_t dpo_idx);
+
+/**
+ * @brief Return true if the dpo is of type strategy rp
+ *
+ * @param dpo Dpo to check the type
+ */
+int hicn_dpo_is_type_strategy_rp (const dpo_id_t *dpo);
+
+/**
+ * @brief Initialize the Replication strategy
+ */
+void hicn_dpo_strategy_rp_module_init (void);
+
+/**
+ * @brief Return the dpo type for the Replication strategy
+ */
+dpo_type_t hicn_dpo_strategy_rp_get_type (void);
+
+/**
+ * @brief Format the dpo ctx for the strategy Replication
+ *
+ * @param s String to append the formatted dpo ctx
+ * @param ap List of arguments to format
+ */
+u8 *format_hicn_dpo_strategy_rp (u8 *s, va_list *ap);
+
+/**
+ * @brief Format the dpo ctx for the strategy Replication. To
+ * call from other functions
+ *
+ * @param s String to append the formatted dpo ctx
+ * @param ... List of arguments to format
+ */
+u8 *hicn_strategy_rp_format_ctx (u8 *s, int n, ...);
+
+#endif // __HICN_DPO_RP_H__
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/hicn-plugin/src/strategies/dpo_rr.c b/hicn-plugin/src/strategies/dpo_rr.c
index 3fe506bd1..86b68186b 100644
--- a/hicn-plugin/src/strategies/dpo_rr.c
+++ b/hicn-plugin/src/strategies/dpo_rr.c
@@ -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:
@@ -28,6 +28,7 @@ static const hicn_dpo_vft_t hicn_dpo_rr_vft = {
   .hicn_dpo_get_type = &hicn_dpo_strategy_rr_get_type,
   .hicn_dpo_module_init = &hicn_dpo_strategy_rr_module_init,
   .hicn_dpo_create = &hicn_strategy_rr_ctx_create,
+  .hicn_dpo_update_type = &hicn_strategy_rr_update_ctx_type,
   .hicn_dpo_add_update_nh = &hicn_strategy_rr_ctx_add_nh,
   .hicn_dpo_del_nh = &hicn_strategy_rr_ctx_del_nh,
   .hicn_dpo_format = &hicn_strategy_rr_format_ctx
@@ -117,11 +118,22 @@ hicn_strategy_rr_ctx_create (fib_protocol_t proto,
 
   *dpo_idx = hicn_strategy_dpo_ctx_get_index (hicn_strategy_ctx);
 
-  init_dpo_ctx (hicn_strategy_ctx, next_hop, nh_len, hicn_dpo_type_rr, proto);
+  init_dpo_ctx (hicn_strategy_ctx, next_hop, nh_len, hicn_dpo_type_rr,
+		(dpo_proto_t) proto);
 
   hicn_strategy_rr_ctx->current_nhop = 0;
 }
 
+void
+hicn_strategy_rr_update_ctx_type (hicn_dpo_ctx_t *hicn_strategy_ctx)
+{
+  hicn_strategy_rr_ctx_t *hicn_strategy_rr_ctx;
+  hicn_strategy_rr_ctx = (hicn_strategy_rr_ctx_t *) hicn_strategy_ctx->data;
+
+  hicn_strategy_ctx->dpo_type = hicn_dpo_type_rr;
+  hicn_strategy_rr_ctx->current_nhop = 0;
+}
+
 int
 hicn_strategy_rr_ctx_add_nh (hicn_face_id_t nh, index_t dpo_idx)
 {
diff --git a/hicn-plugin/src/strategies/dpo_rr.h b/hicn-plugin/src/strategies/dpo_rr.h
index e68e2917d..72ec7b5df 100644
--- a/hicn-plugin/src/strategies/dpo_rr.h
+++ b/hicn-plugin/src/strategies/dpo_rr.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:
@@ -74,6 +74,13 @@ void hicn_strategy_rr_ctx_create (fib_protocol_t proto,
 				  index_t *dpo_idx);
 
 /**
+ * @brief Update existing ctx setting it to rr
+ *
+ * @param hicn_strategy_ctx pointer to the ctx to update
+ */
+void hicn_strategy_rr_update_ctx_type (hicn_dpo_ctx_t *hicn_strategy_ctx);
+
+/**
  * @brief Add or update a next hop in the dpo ctx.
  *
  * This function is meant to be used in the control plane and not in the data
diff --git a/hicn-plugin/src/strategies/strategy_mw.c b/hicn-plugin/src/strategies/strategy_mw.c
index 9409ec856..990e64a5d 100644
--- a/hicn-plugin/src/strategies/strategy_mw.c
+++ b/hicn-plugin/src/strategies/strategy_mw.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:
@@ -25,7 +25,7 @@ void hicn_receive_data_mw (index_t dpo_idx, int nh_idx);
 void hicn_add_interest_mw (index_t dpo_idx, hicn_hash_entry_t *pit_entry);
 void hicn_on_interest_timeout_mw (index_t dpo_idx);
 u32 hicn_select_next_hop_mw (index_t dpo_idx, int *nh_idx,
-			     hicn_face_id_t *outface);
+			     hicn_face_id_t *outfaces, uint32_t *len);
 u32 get_strategy_node_index_mw (void);
 u8 *hicn_strategy_format_trace_mw (u8 *s, hicn_strategy_trace_t *t);
 u8 *hicn_strategy_format_mw (u8 *s, va_list *ap);
@@ -51,12 +51,16 @@ hicn_mw_strategy_get_vft (void)
 /* DPO should be give in input as it containes all the information to calculate
  * the next hops*/
 u32
-hicn_select_next_hop_mw (index_t dpo_idx, int *nh_idx, hicn_face_id_t *outface)
+hicn_select_next_hop_mw (index_t dpo_idx, int *nh_idx,
+			 hicn_face_id_t *outfaces, uint32_t *len)
 {
   hicn_dpo_ctx_t *dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
 
   if (dpo_ctx == NULL)
-    return HICN_ERROR_STRATEGY_NOT_FOUND;
+    {
+      *len = 0;
+      return HICN_ERROR_STRATEGY_NOT_FOUND;
+    }
 
   hicn_strategy_mw_ctx_t *hicn_strategy_mw_ctx =
     (hicn_strategy_mw_ctx_t *) dpo_ctx->data;
@@ -71,7 +75,8 @@ hicn_select_next_hop_mw (index_t dpo_idx, int *nh_idx, hicn_face_id_t *outface)
 	}
     }
 
-  *outface = dpo_ctx->next_hops[next_hop_index];
+  outfaces[0] = dpo_ctx->next_hops[next_hop_index];
+  *len = 1;
 
   return HICN_ERROR_NONE;
 }
@@ -84,7 +89,6 @@ hicn_add_interest_mw (index_t dpo_ctx_idx, hicn_hash_entry_t *hash_entry)
 			   .dpoi_proto = 0,
 			   .dpoi_next_node = 0,
 			   .dpoi_index = dpo_ctx_idx };
-  hicn_strategy_dpo_ctx_lock (&hicn_dpo_id);
   hash_entry->vft_id = hicn_dpo_get_vft_id (&hicn_dpo_id);
 }
 
diff --git a/hicn-plugin/src/strategies/strategy_mw.h b/hicn-plugin/src/strategies/strategy_mw.h
index 9e0078b23..186e8c5ab 100644
--- a/hicn-plugin/src/strategies/strategy_mw.h
+++ b/hicn-plugin/src/strategies/strategy_mw.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:
diff --git a/hicn-plugin/src/strategies/strategy_mw_cli.c b/hicn-plugin/src/strategies/strategy_mw_cli.c
index 6b56e9fd5..4ace68423 100644
--- a/hicn-plugin/src/strategies/strategy_mw_cli.c
+++ b/hicn-plugin/src/strategies/strategy_mw_cli.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:
@@ -76,7 +76,7 @@ hicn_mw_strategy_cli_set_weight_command_fn (vlib_main_t *vm,
     }
 
   prefix.fp_proto = ip46_address_is_ip4 (&prefix.fp_addr) ? FIB_PROTOCOL_IP4 :
-							    FIB_PROTOCOL_IP6;
+								  FIB_PROTOCOL_IP6;
   ret = hicn_route_get_dpo (&prefix, &hicn_dpo_id, &fib_index);
 
   if (ret == HICN_ERROR_NONE)
diff --git a/hicn-plugin/src/strategies/strategy_rp.c b/hicn-plugin/src/strategies/strategy_rp.c
new file mode 100644
index 000000000..748cd69b1
--- /dev/null
+++ b/hicn-plugin/src/strategies/strategy_rp.c
@@ -0,0 +1,118 @@
+/*
+ * 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:
+ *
+ *     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.
+ */
+
+#include "dpo_rp.h"
+#include "../strategy.h"
+#include "../strategy_dpo_ctx.h"
+#include "../faces/face.h"
+#include "../hashtb.h"
+#include "../strategy_dpo_manager.h"
+
+/* Simple strategy that forwards intertests to all next hops */
+/* It does not require to exend the hicn_dpo */
+void hicn_receive_data_rp (index_t dpo_idx, int nh_idx);
+void hicn_add_interest_rp (index_t dpo_idx, hicn_hash_entry_t *pit_entry);
+void hicn_on_interest_timeout_rp (index_t dpo_idx);
+u32 hicn_select_next_hop_rp (index_t dpo_idx, int *nh_idx,
+			     hicn_face_id_t *outfaces, uint32_t *len);
+u8 *hicn_strategy_format_trace_rp (u8 *s, hicn_strategy_trace_t *t);
+u8 *hicn_strategy_format_rp (u8 *s, va_list *ap);
+
+static hicn_strategy_vft_t hicn_strategy_rp_vft = {
+  .hicn_receive_data = &hicn_receive_data_rp,
+  .hicn_add_interest = &hicn_add_interest_rp,
+  .hicn_on_interest_timeout = &hicn_on_interest_timeout_rp,
+  .hicn_select_next_hop = &hicn_select_next_hop_rp,
+  .hicn_format_strategy_trace = &hicn_strategy_format_trace_rp,
+  .hicn_format_strategy = &hicn_strategy_format_rp
+};
+
+/*
+ * Return the vft of the strategy.
+ */
+hicn_strategy_vft_t *
+hicn_rp_strategy_get_vft (void)
+{
+  return &hicn_strategy_rp_vft;
+}
+
+/* DPO should be give in input as it containes all the information to calculate
+ * the next hops*/
+u32
+hicn_select_next_hop_rp (index_t dpo_idx, int *nh_idx,
+			 hicn_face_id_t *outfaces, uint32_t *len)
+{
+  hicn_dpo_ctx_t *dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
+
+  if (dpo_ctx == NULL || dpo_ctx->entry_count == 0)
+    {
+      *len = 0;
+      return HICN_ERROR_STRATEGY_NOT_FOUND;
+    }
+
+  int i = 0;
+  while (i < MAX_OUT_FACES && i < dpo_ctx->entry_count)
+    {
+      outfaces[i] = dpo_ctx->next_hops[i];
+      i++;
+    }
+  *len = i;
+
+  return HICN_ERROR_NONE;
+}
+
+void
+hicn_add_interest_rp (index_t dpo_ctx_idx, hicn_hash_entry_t *hash_entry)
+{
+  /* Nothing to do */
+}
+
+void
+hicn_on_interest_timeout_rp (index_t dpo_idx)
+{
+  /* Nothing to do in the rp strategy when we receive an interest */
+}
+
+void
+hicn_receive_data_rp (index_t dpo_idx, int nh_idx)
+{
+  /* nothing to do */
+}
+
+/* packet trace format function */
+u8 *
+hicn_strategy_format_trace_rp (u8 *s, hicn_strategy_trace_t *t)
+{
+  s = format (s, "Strategy_rp: pkt: %d, sw_if_index %d, next index %d",
+	      (int) t->pkt_type, t->sw_if_index, t->next_index);
+  return (s);
+}
+
+u8 *
+hicn_strategy_format_rp (u8 *s, va_list *ap)
+{
+
+  u32 indent = va_arg (*ap, u32);
+  s = format (s, "Replication: send to all the next hops \n", indent);
+  return (s);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/hicn-plugin/src/strategies/strategy_rp.h b/hicn-plugin/src/strategies/strategy_rp.h
new file mode 100644
index 000000000..c308497cc
--- /dev/null
+++ b/hicn-plugin/src/strategies/strategy_rp.h
@@ -0,0 +1,41 @@
+/*
+ * 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:
+ *
+ *     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 __HICN_STRATEGY_RP_H__
+#define __HICN_STRATEGY_RP_H__
+
+#include "../strategy.h"
+
+/**
+ * @file strategy_rp.h
+ *
+ * This file implements the replication strategy. In this
+ * strategy all the next hops are used to send an intertest.
+ */
+
+/**
+ * @brief Return the vft for the Replication strategy
+ */
+hicn_strategy_vft_t *hicn_rp_strategy_get_vft (void);
+
+#endif // __HICN_STRATEGY_RP_H__
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/hicn-plugin/src/strategies/strategy_rr.c b/hicn-plugin/src/strategies/strategy_rr.c
index 9995191b7..192cf5fc3 100644
--- a/hicn-plugin/src/strategies/strategy_rr.c
+++ b/hicn-plugin/src/strategies/strategy_rr.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:
@@ -26,7 +26,7 @@ void hicn_receive_data_rr (index_t dpo_idx, int nh_idx);
 void hicn_add_interest_rr (index_t dpo_idx, hicn_hash_entry_t *pit_entry);
 void hicn_on_interest_timeout_rr (index_t dpo_idx);
 u32 hicn_select_next_hop_rr (index_t dpo_idx, int *nh_idx,
-			     hicn_face_id_t *outface);
+			     hicn_face_id_t *outfaces, uint32_t *len);
 u8 *hicn_strategy_format_trace_rr (u8 *s, hicn_strategy_trace_t *t);
 u8 *hicn_strategy_format_rr (u8 *s, va_list *ap);
 
@@ -51,17 +51,22 @@ hicn_rr_strategy_get_vft (void)
 /* DPO should be give in input as it containes all the information to calculate
  * the next hops*/
 u32
-hicn_select_next_hop_rr (index_t dpo_idx, int *nh_idx, hicn_face_id_t *outface)
+hicn_select_next_hop_rr (index_t dpo_idx, int *nh_idx,
+			 hicn_face_id_t *outfaces, uint32_t *len)
 {
   hicn_dpo_ctx_t *dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
 
   if (dpo_ctx == NULL)
-    return HICN_ERROR_STRATEGY_NOT_FOUND;
+    {
+      *len = 0;
+      return HICN_ERROR_STRATEGY_NOT_FOUND;
+    }
 
   hicn_strategy_rr_ctx_t *hicn_strategy_rr_ctx =
     (hicn_strategy_rr_ctx_t *) dpo_ctx->data;
 
-  *outface = dpo_ctx->next_hops[hicn_strategy_rr_ctx->current_nhop];
+  outfaces[0] = dpo_ctx->next_hops[hicn_strategy_rr_ctx->current_nhop];
+  *len = 1;
 
   hicn_strategy_rr_ctx->current_nhop =
     (hicn_strategy_rr_ctx->current_nhop + 1) % dpo_ctx->entry_count;
@@ -77,7 +82,6 @@ hicn_add_interest_rr (index_t dpo_ctx_idx, hicn_hash_entry_t *hash_entry)
 			   .dpoi_proto = 0,
 			   .dpoi_next_node = 0,
 			   .dpoi_index = dpo_ctx_idx };
-  hicn_strategy_dpo_ctx_lock (&hicn_dpo_id);
   hash_entry->vft_id = hicn_dpo_get_vft_id (&hicn_dpo_id);
 }
 
diff --git a/hicn-plugin/src/strategies/strategy_rr.h b/hicn-plugin/src/strategies/strategy_rr.h
index 4dfe76b43..fb7520180 100644
--- a/hicn-plugin/src/strategies/strategy_rr.h
+++ b/hicn-plugin/src/strategies/strategy_rr.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019 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: