[HICN-547] Removing punting through acl for interests

Change-Id: I71767f732ec6ede1efc66e5a99f09c3207367dcb
Signed-off-by: Alberto Compagno <acompagn+fdio@cisco.com>

9 files changed, 218 insertions, 524 deletions

diff --git a/hicn-plugin/src/strategies/dpo_mw.c b/hicn-plugin/src/strategies/dpo_mw.c
index 3317d31e0..eebb572c4 100644
--- a/hicn-plugin/src/strategies/dpo_mw.c
+++ b/hicn-plugin/src/strategies/dpo_mw.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * Copyright (c) 2017-2020 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:
@@ -13,27 +13,10 @@
  * limitations under the License.
  */
 
-#include "../strategy_dpo_ctx.h"
 #include "dpo_mw.h"
 #include "strategy_mw.h"
 #include "../strategy_dpo_manager.h"
-
-hicn_strategy_mw_ctx_t *hicn_strategy_mw_ctx_pool;
-
-const static char *const hicn_ip6_nodes[] = {
-  "hicn-mw-strategy",		// this is the name you give your node in VLIB_REGISTER_NODE
-  NULL,
-};
-
-const static char *const hicn_ip4_nodes[] = {
-  "hicn-mw-strategy",		// this is the name you give your node in VLIB_REGISTER_NODE
-  NULL,
-};
-
-const static char *const *const hicn_nodes_mw[DPO_PROTO_NUM] = {
-  [DPO_PROTO_IP6] = hicn_ip6_nodes,
-  [DPO_PROTO_IP4] = hicn_ip4_nodes,
-};
+#include "../strategy_dpo_ctx.h"
 
 /**
  * @brief DPO type value for the mw_strategy
@@ -41,16 +24,13 @@ const static char *const *const hicn_nodes_mw[DPO_PROTO_NUM] = {
 static dpo_type_t hicn_dpo_type_mw;
 
 static const hicn_dpo_vft_t hicn_dpo_mw_vft = {
-  .hicn_dpo_get_ctx = &hicn_strategy_mw_ctx_get,
   .hicn_dpo_is_type = &hicn_dpo_is_type_strategy_mw,
   .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_add_update_nh = &hicn_strategy_mw_ctx_add_nh,
   .hicn_dpo_del_nh = &hicn_strategy_mw_ctx_del_nh,
-  .hicn_dpo_lock_dpo_ctx = &hicn_strategy_mw_ctx_lock,
-  .hicn_dpo_unlock_dpo_ctx = hicn_strategy_mw_ctx_unlock,
-  .format_hicn_dpo = &format_hicn_dpo_strategy_mw
+  .hicn_dpo_format = &hicn_strategy_mw_format_ctx
 };
 
 int
@@ -62,28 +42,15 @@ hicn_dpo_is_type_strategy_mw (const dpo_id_t * dpo)
 void
 hicn_dpo_strategy_mw_module_init (void)
 {
-  pool_validate_index (hicn_strategy_mw_ctx_pool, 0);
   /*
    * Register our type of dpo
    */
   hicn_dpo_type_mw =
-    hicn_dpo_register_new_type (hicn_nodes_mw, &hicn_dpo_mw_vft,
+    hicn_dpo_register_new_type (hicn_nodes_strategy, &hicn_dpo_mw_vft,
 				hicn_mw_strategy_get_vft (),
 				&dpo_strategy_mw_ctx_vft);
 }
 
-u8 *
-format_hicn_dpo_strategy_mw (u8 * s, va_list * ap)
-{
-
-  u32 indent = va_arg (*ap, u32);
-  s =
-    format (s,
-	    "Static Weights: weights are updated by the control plane, next hop is the one with the maximum weight.\n",
-	    indent);
-  return (s);
-}
-
 dpo_type_t
 hicn_dpo_strategy_mw_get_type (void)
 {
@@ -92,33 +59,14 @@ hicn_dpo_strategy_mw_get_type (void)
 
 //////////////////////////////////////////////////////////////////////////////////////////////////
 
-void
-hicn_strategy_mw_ctx_lock (dpo_id_t * dpo)
-{
-  hicn_strategy_mw_ctx_t *hicn_strategy_mw_ctx =
-    (hicn_strategy_mw_ctx_t *) hicn_strategy_mw_ctx_get (dpo->dpoi_index);
-
-  if (hicn_strategy_mw_ctx != NULL)
-    {
-      hicn_strategy_mw_ctx->default_ctx.locks++;
-    }
-}
 
-void
-hicn_strategy_mw_ctx_unlock (dpo_id_t * dpo)
+u8 *
+hicn_strategy_mw_format_ctx (u8 * s, int n, ...)
 {
-  hicn_strategy_mw_ctx_t *hicn_strategy_mw_ctx =
-    (hicn_strategy_mw_ctx_t *) hicn_strategy_mw_ctx_get (dpo->dpoi_index);
-
-  if (hicn_strategy_mw_ctx != NULL)
-    {
-      hicn_strategy_mw_ctx->default_ctx.locks--;
-
-      if (0 == hicn_strategy_mw_ctx->default_ctx.locks)
-	{
-	  pool_put (hicn_strategy_mw_ctx_pool, hicn_strategy_mw_ctx);
-	}
-    }
+  va_list args;
+  va_start (args, n);
+  s = format_hicn_strategy_mw_ctx (s, &args);
+  return s;
 }
 
 u8 *
@@ -126,24 +74,30 @@ format_hicn_strategy_mw_ctx (u8 * s, va_list * ap)
 {
   int i = 0;
   index_t index = va_arg (*ap, index_t);
-  hicn_strategy_mw_ctx_t *dpo = NULL;
+  hicn_dpo_ctx_t *dpo_ctx = NULL;
+  hicn_strategy_mw_ctx_t *mw_dpo_ctx = NULL;
   dpo_id_t *next_hop = NULL;
   hicn_face_vft_t *face_vft = NULL;
   u32 indent = va_arg (*ap, u32);;
 
-  dpo = (hicn_strategy_mw_ctx_t *) hicn_strategy_mw_ctx_get (index);
+  dpo_ctx = hicn_strategy_dpo_ctx_get (index);
+  if (dpo_ctx == NULL)
+    return s;
+
+  mw_dpo_ctx = (hicn_strategy_mw_ctx_t *) dpo_ctx->data;
 
   s = format (s, "hicn-mw");
-  for (i = 0; i < HICN_PARAM_FIB_ENTRY_NHOPS_MAX && dpo != NULL; i++)
+  for (i = 0; i < HICN_PARAM_FIB_ENTRY_NHOPS_MAX; i++)
     {
       u8 *buf = NULL;
-      if (i < dpo->default_ctx.entry_count)
-	buf = format(NULL, "FIB");
-      else if (i >= HICN_PARAM_FIB_ENTRY_NHOPS_MAX - dpo->default_ctx.tfib_entry_count)
-	buf = format(NULL, "TFIB");
+      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;
-      next_hop = &dpo->default_ctx.next_hops[i];
+      next_hop = &dpo_ctx->next_hops[i];
       face_vft = hicn_face_get_vft (next_hop->dpoi_type);
       if (face_vft != NULL)
 	{
@@ -151,7 +105,7 @@ format_hicn_strategy_mw_ctx (u8 * s, va_list * ap)
 	  s =
 	    format (s, "%U ", face_vft->format_face, next_hop->dpoi_index,
 		    indent);
-	  s = format (s, "weight %u", dpo->weight[i]);
+	  s = format (s, "weight %u", mw_dpo_ctx->weight[i]);
 	  s = format (s, " %s", buf);
 	}
     }
@@ -159,124 +113,49 @@ format_hicn_strategy_mw_ctx (u8 * s, va_list * ap)
   return (s);
 }
 
-static index_t
-hicn_strategy_mw_ctx_get_index (hicn_strategy_mw_ctx_t * cd)
-{
-  return (cd - hicn_strategy_mw_ctx_pool);
-}
-
-int
+void
 hicn_strategy_mw_ctx_create (dpo_proto_t proto, const dpo_id_t * next_hop,
 			     int nh_len, index_t * dpo_idx)
 {
   hicn_strategy_mw_ctx_t *hicn_strategy_mw_ctx;
-  int ret = HICN_ERROR_NONE, i;
+  hicn_dpo_ctx_t *hicn_strategy_ctx;
 
   /* Allocate a hicn_dpo_ctx on the vpp pool and initialize it */
-  pool_get (hicn_strategy_mw_ctx_pool, hicn_strategy_mw_ctx);
+  hicn_strategy_ctx = hicn_strategy_dpo_ctx_alloc ();
+  hicn_strategy_mw_ctx = (hicn_strategy_mw_ctx_t *) hicn_strategy_ctx->data;
 
-  *dpo_idx = hicn_strategy_mw_ctx_get_index (hicn_strategy_mw_ctx);
+  *dpo_idx = hicn_strategy_dpo_ctx_get_index (hicn_strategy_ctx);
 
-  init_dpo_ctx (&(hicn_strategy_mw_ctx->default_ctx));
-
-  for (i = 0; i < HICN_PARAM_FIB_ENTRY_NHOPS_MAX && i < nh_len; i++)
-    {
-      clib_memcpy (&hicn_strategy_mw_ctx->default_ctx.next_hops[i],
-		   &next_hop[i], sizeof (dpo_id_t));
-      hicn_strategy_mw_ctx->default_ctx.entry_count++;
-    }
+  init_dpo_ctx (hicn_strategy_ctx, next_hop, nh_len, hicn_dpo_type_mw);
 
   memset (hicn_strategy_mw_ctx->weight, 0, HICN_PARAM_FIB_ENTRY_NHOPS_MAX);
-
-  return ret;
-}
-
-hicn_dpo_ctx_t *
-hicn_strategy_mw_ctx_get (index_t index)
-{
-  hicn_strategy_mw_ctx_t *hicn_strategy_mw_ctx = NULL;
-  if (!pool_is_free_index (hicn_strategy_mw_ctx_pool, index))
-    {
-      hicn_strategy_mw_ctx =
-        (pool_elt_at_index (hicn_strategy_mw_ctx_pool, index));
-    }
-
-  return (hicn_dpo_ctx_t *)hicn_strategy_mw_ctx;
 }
 
 int
 hicn_strategy_mw_ctx_add_nh (const dpo_id_t * nh, index_t dpo_idx)
 {
-  hicn_strategy_mw_ctx_t *hicn_strategy_mw_ctx =
-    (hicn_strategy_mw_ctx_t *) hicn_strategy_mw_ctx_get (dpo_idx);
+  hicn_dpo_ctx_t *hicn_strategy_dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
+  u8 pos = 0;
 
-  if (hicn_strategy_mw_ctx == NULL)
+  if (hicn_strategy_dpo_ctx == NULL)
     {
       return HICN_ERROR_STRATEGY_NOT_FOUND;
     }
 
-  int empty = hicn_strategy_mw_ctx->default_ctx.entry_count;
-
-  /* Iterate through the list of faces to add new faces */
-  for (int i = 0; i < hicn_strategy_mw_ctx->default_ctx.entry_count; i++)
-    {
-      if (!memcmp
-          (nh, &hicn_strategy_mw_ctx->default_ctx.next_hops[i],
-           sizeof (dpo_id_t)))
-        {
-          /* If face is marked as deleted, ignore it */
-          hicn_face_t *face =
-            hicn_dpoi_get_from_idx (hicn_strategy_mw_ctx->
-                                    default_ctx.next_hops[i].dpoi_index);
-          if (face->shared.flags & HICN_FACE_FLAGS_DELETED)
-            {
-              continue;
-            }
-          return HICN_ERROR_DPO_CTX_NHOPS_EXISTS;
-        }
-    }
-
-  /* Get an empty place */
-  if (empty > HICN_PARAM_FIB_ENTRY_NHOPS_MAX)
-    {
-      return HICN_ERROR_DPO_CTX_NHOPS_NS;
-    }
-
-  clib_memcpy (&hicn_strategy_mw_ctx->default_ctx.next_hops[empty], nh,
-               sizeof (dpo_id_t));
-  hicn_strategy_mw_ctx->default_ctx.entry_count++;
+  hicn_strategy_dpo_ctx_add_nh (nh, hicn_strategy_dpo_ctx, &pos);
+  hicn_strategy_mw_ctx_t *hicn_strategy_mw_ctx =
+    (hicn_strategy_mw_ctx_t *) & hicn_strategy_dpo_ctx->data;
 
+  hicn_strategy_mw_ctx->weight[pos] = DEFAULT_WEIGHT;
   return HICN_ERROR_NONE;
 }
 
 int
-hicn_strategy_mw_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx,
-			     fib_prefix_t * fib_pfx)
+hicn_strategy_mw_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx)
 {
-  hicn_strategy_mw_ctx_t *hicn_strategy_mw_ctx =
-    (hicn_strategy_mw_ctx_t *) hicn_strategy_mw_ctx_get (dpo_idx);
-  int ret = HICN_ERROR_DPO_CTX_NOT_FOUND;
-  dpo_id_t invalid = NEXT_HOP_INVALID;
-
-  if (hicn_strategy_mw_ctx == NULL)
-    return HICN_ERROR_STRATEGY_NOT_FOUND;
-
-  for (int i = 0; i < hicn_strategy_mw_ctx->default_ctx.entry_count; i++)
-    {
-      if (hicn_strategy_mw_ctx->default_ctx.next_hops[i].dpoi_index ==
-          face_id)
-        {
-          hicn_face_unlock (&hicn_strategy_mw_ctx->default_ctx.
-                            next_hops[i]);
-          hicn_strategy_mw_ctx->default_ctx.entry_count--;
-          hicn_strategy_mw_ctx->default_ctx.next_hops[i] = hicn_strategy_mw_ctx->default_ctx.next_hops[hicn_strategy_mw_ctx->default_ctx.entry_count];
-          hicn_strategy_mw_ctx->default_ctx.next_hops[hicn_strategy_mw_ctx->default_ctx.entry_count] = invalid;
-          ret = HICN_ERROR_NONE;
-          break;
-        }
-    }
-
-  return ret;
+  hicn_dpo_ctx_t *hicn_strategy_dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
+  //No need to flush the weights, they are initialized when a dpo_ctx is created;
+  return hicn_strategy_dpo_ctx_del_nh (face_id, hicn_strategy_dpo_ctx);
 }
 
 /*
diff --git a/hicn-plugin/src/strategies/dpo_mw.h b/hicn-plugin/src/strategies/dpo_mw.h
index a8c0a3b43..ccc8d044f 100644
--- a/hicn-plugin/src/strategies/dpo_mw.h
+++ b/hicn-plugin/src/strategies/dpo_mw.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * Copyright (c) 2017-2020 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:
@@ -19,28 +19,14 @@
 #include <vnet/dpo/dpo.h>
 #include "../strategy_dpo_ctx.h"
 
+#define DEFAULT_WEIGHT 0
+
 typedef struct hicn_strategy_mw_ctx_s
 {
-  hicn_dpo_ctx_t default_ctx;
-
   u8 weight[HICN_PARAM_FIB_ENTRY_NHOPS_MAX];
 } hicn_strategy_mw_ctx_t;
 
 /**
- * @brief Lock the mw ctx
- *
- * @param dpo Identifier of the dpo of the mw ctx
- */
-void hicn_strategy_mw_ctx_lock (dpo_id_t * dpo);
-
-/**
- * @brief Unlock the mw ctx
- *
- * @param dpo Identifier of the dpo of the mw ctx
- */
-void hicn_strategy_mw_ctx_unlock (dpo_id_t * dpo);
-
-/**
  * @brief Format the dpo ctx for a human-readable string
  *
  * @param s String to which to append the formatted dpo ctx
@@ -51,8 +37,8 @@ void hicn_strategy_mw_ctx_unlock (dpo_id_t * dpo);
 u8 *format_hicn_strategy_mw_ctx (u8 * s, va_list * ap);
 
 const static dpo_vft_t dpo_strategy_mw_ctx_vft = {
-  .dv_lock = hicn_strategy_mw_ctx_lock,
-  .dv_unlock = hicn_strategy_mw_ctx_unlock,
+  .dv_lock = hicn_strategy_dpo_ctx_lock,
+  .dv_unlock = hicn_strategy_dpo_ctx_unlock,
   .dv_format = format_hicn_strategy_mw_ctx,
 };
 
@@ -73,7 +59,7 @@ hicn_dpo_ctx_t *hicn_strategy_mw_ctx_get (index_t index);
  * @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
  */
-int
+void
 hicn_strategy_mw_ctx_create (dpo_proto_t proto, const dpo_id_t * next_hop,
 			     int nh_len, index_t * dpo_idx);
 
@@ -100,9 +86,7 @@ int hicn_strategy_mw_ctx_add_nh (const dpo_id_t * nh, index_t dpo_idx);
  * @return HICN_ERROR_NONE if the update or insert was fine,
  * otherwise HICN_ERROR_DPO_CTS_NOT_FOUND
  */
-int
-hicn_strategy_mw_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx,
-			     fib_prefix_t * fib_pfx);
+int hicn_strategy_mw_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx);
 
 /**
  * @brief Prefetch a dpo
@@ -111,14 +95,40 @@ hicn_strategy_mw_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx,
  */
 void hicn_strategy_mw_ctx_prefetch (index_t dpo_idx);
 
+/**
+ * @brief Return true if the dpo is of type strategy mw
+ *
+ * @param dpo Dpo to check the type
+ */
 int hicn_dpo_is_type_strategy_mw (const dpo_id_t * dpo);
 
+/**
+ * @brief Initialize the Maximum Weight strategy
+ */
 void hicn_dpo_strategy_mw_module_init (void);
 
+/**
+ * @brief Return the dpo type for the Maximum Weight strategy
+ */
 dpo_type_t hicn_dpo_strategy_mw_get_type (void);
 
+/**
+ * @brief Format the dpo ctx for the strategy Maximum Weight
+ *
+ * @param s String to append the formatted dpo ctx
+ * @param ap List of arguments to format
+ */
 u8 *format_hicn_dpo_strategy_mw (u8 * s, va_list * ap);
 
+/**
+ * @brief Format the dpo ctx for the strategy Maximum Weight. To
+ * call from other functions
+ *
+ * @param s String to append the formatted dpo ctx
+ * @param ... List of arguments to format
+ */
+u8 *hicn_strategy_mw_format_ctx (u8 * s, int n, ...);
+
 
 #endif // __HICN_DPO_MW_H__
 
diff --git a/hicn-plugin/src/strategies/dpo_rr.c b/hicn-plugin/src/strategies/dpo_rr.c
index dfdc83ff4..a67b06acb 100644
--- a/hicn-plugin/src/strategies/dpo_rr.c
+++ b/hicn-plugin/src/strategies/dpo_rr.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * Copyright (c) 2017-2020 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:
@@ -13,27 +13,10 @@
  * limitations under the License.
  */
 
-#include "../strategy_dpo_ctx.h"
 #include "dpo_rr.h"
 #include "strategy_rr.h"
 #include "../strategy_dpo_manager.h"
-
-hicn_strategy_rr_ctx_t *hicn_strategy_rr_ctx_pool;
-
-const static char *const hicn_ip6_nodes[] = {
-  "hicn-rr-strategy",		// this is the name you give your node in VLIB_REGISTER_NODE
-  NULL,
-};
-
-const static char *const hicn_ip4_nodes[] = {
-  "hicn-rr-strategy",		// this is the name you give your node in VLIB_REGISTER_NODE
-  NULL,
-};
-
-const static char *const *const hicn_nodes_rr[DPO_PROTO_NUM] = {
-  [DPO_PROTO_IP6] = hicn_ip6_nodes,
-  [DPO_PROTO_IP4] = hicn_ip4_nodes,
-};
+#include "../strategy_dpo_ctx.h"
 
 /**
  * @brief DPO type value for the rr_strategy
@@ -41,16 +24,13 @@ const static char *const *const hicn_nodes_rr[DPO_PROTO_NUM] = {
 static dpo_type_t hicn_dpo_type_rr;
 
 static const hicn_dpo_vft_t hicn_dpo_rr_vft = {
-  .hicn_dpo_get_ctx = &hicn_strategy_rr_ctx_get,
   .hicn_dpo_is_type = &hicn_dpo_is_type_strategy_rr,
   .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_add_update_nh = &hicn_strategy_rr_ctx_add_nh,
   .hicn_dpo_del_nh = &hicn_strategy_rr_ctx_del_nh,
-  .hicn_dpo_lock_dpo_ctx = &hicn_strategy_rr_ctx_lock,
-  .hicn_dpo_unlock_dpo_ctx = hicn_strategy_rr_ctx_unlock,
-  .format_hicn_dpo = &format_hicn_dpo_strategy_rr
+  .hicn_dpo_format = &hicn_strategy_rr_format_ctx
 };
 
 int
@@ -62,28 +42,15 @@ hicn_dpo_is_type_strategy_rr (const dpo_id_t * dpo)
 void
 hicn_dpo_strategy_rr_module_init (void)
 {
-  pool_validate_index (hicn_strategy_rr_ctx_pool, 0);
   /*
    * Register our type of dpo
    */
   hicn_dpo_type_rr =
-    hicn_dpo_register_new_type (hicn_nodes_rr, &hicn_dpo_rr_vft,
+    hicn_dpo_register_new_type (hicn_nodes_strategy, &hicn_dpo_rr_vft,
 				hicn_rr_strategy_get_vft (),
 				&dpo_strategy_rr_ctx_vft);
 }
 
-u8 *
-format_hicn_dpo_strategy_rr (u8 * s, va_list * ap)
-{
-
-  u32 indent = va_arg (*ap, u32);
-  s =
-    format (s,
-	    "Round Robin: next hop is chosen ciclying between all the available next hops, one after the other.\n",
-	    indent);
-  return (s);
-}
-
 dpo_type_t
 hicn_dpo_strategy_rr_get_type (void)
 {
@@ -92,32 +59,14 @@ hicn_dpo_strategy_rr_get_type (void)
 
 //////////////////////////////////////////////////////////////////////////////////////////////////
 
-void
-hicn_strategy_rr_ctx_lock (dpo_id_t * dpo)
-{
-  hicn_strategy_rr_ctx_t *hicn_strategy_rr_ctx =
-    (hicn_strategy_rr_ctx_t *) hicn_strategy_rr_ctx_get (dpo->dpoi_index);
-
-  if (hicn_strategy_rr_ctx != NULL)
-    {
-      hicn_strategy_rr_ctx->default_ctx.locks++;
-    }
-}
 
-void
-hicn_strategy_rr_ctx_unlock (dpo_id_t * dpo)
+u8 *
+hicn_strategy_rr_format_ctx (u8 * s, int n, ...)
 {
-  hicn_strategy_rr_ctx_t *hicn_strategy_rr_ctx =
-    (hicn_strategy_rr_ctx_t *) hicn_strategy_rr_ctx_get (dpo->dpoi_index);
-  if (hicn_strategy_rr_ctx != NULL)
-    {
-      hicn_strategy_rr_ctx->default_ctx.locks--;
-
-      if (0 == hicn_strategy_rr_ctx->default_ctx.locks)
-	{
-	  pool_put (hicn_strategy_rr_ctx_pool, hicn_strategy_rr_ctx);
-	}
-    }
+  va_list args;
+  va_start (args, n);
+  s = format_hicn_strategy_rr_ctx (s, &args);
+  return s;
 }
 
 u8 *
@@ -125,28 +74,34 @@ format_hicn_strategy_rr_ctx (u8 * s, va_list * ap)
 {
   int i = 0;
   index_t index = va_arg (*ap, index_t);
-  hicn_strategy_rr_ctx_t *dpo = NULL;
+  hicn_dpo_ctx_t *dpo_ctx = NULL;
+  hicn_strategy_rr_ctx_t *rr_dpo_ctx = NULL;
   dpo_id_t *next_hop = NULL;
   hicn_face_vft_t *face_vft = NULL;
-  u32 indent = va_arg (*ap, u32);;
+  u32 indent = va_arg (*ap, u32);
 
-  dpo = (hicn_strategy_rr_ctx_t *) hicn_strategy_rr_ctx_get (index);
+  dpo_ctx = hicn_strategy_dpo_ctx_get (index);
+  if (dpo_ctx == NULL)
+    return s;
+
+  rr_dpo_ctx = (hicn_strategy_rr_ctx_t *) dpo_ctx->data;
 
   s =
     format (s, "hicn-rr, next hop Face %d",
-	    dpo->default_ctx.next_hops[dpo->current_nhop].dpoi_index);
+	    dpo_ctx->next_hops[rr_dpo_ctx->current_nhop].dpoi_index);
 
-  for (i = 0; i < HICN_PARAM_FIB_ENTRY_NHOPS_MAX && dpo != NULL; i++)
+  for (i = 0; i < HICN_PARAM_FIB_ENTRY_NHOPS_MAX; i++)
     {
       u8 *buf = NULL;
-      if (i < dpo->default_ctx.entry_count)
-	buf = format(NULL, "FIB");
-      else if (i >= HICN_PARAM_FIB_ENTRY_NHOPS_MAX - dpo->default_ctx.tfib_entry_count)
-	buf = format(NULL, "TFIB");
+      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;
 
-      next_hop = &dpo->default_ctx.next_hops[i];
+      next_hop = &dpo_ctx->next_hops[i];
       face_vft = hicn_face_get_vft (next_hop->dpoi_type);
       if (face_vft != NULL)
 	{
@@ -154,132 +109,53 @@ format_hicn_strategy_rr_ctx (u8 * s, va_list * ap)
 	  s =
 	    format (s, "%U ", face_vft->format_face, next_hop->dpoi_index,
 		    indent);
-          s = format (s, " %s", buf);
+	  s = format (s, " %s", buf);
 	}
     }
 
   return (s);
 }
 
-static index_t
-hicn_strategy_rr_ctx_get_index (hicn_strategy_rr_ctx_t * cd)
-{
-  return (cd - hicn_strategy_rr_ctx_pool);
-}
-
-int
+void
 hicn_strategy_rr_ctx_create (dpo_proto_t proto, const dpo_id_t * next_hop,
 			     int nh_len, index_t * dpo_idx)
 {
   hicn_strategy_rr_ctx_t *hicn_strategy_rr_ctx;
-  int ret = HICN_ERROR_NONE, i;
+  hicn_dpo_ctx_t *hicn_strategy_ctx;
 
   /* Allocate a hicn_dpo_ctx on the vpp pool and initialize it */
-  pool_get (hicn_strategy_rr_ctx_pool, hicn_strategy_rr_ctx);
+  hicn_strategy_ctx = hicn_strategy_dpo_ctx_alloc ();
+  hicn_strategy_rr_ctx = (hicn_strategy_rr_ctx_t *) hicn_strategy_ctx->data;
 
-  *dpo_idx = hicn_strategy_rr_ctx_get_index (hicn_strategy_rr_ctx);
+  *dpo_idx = hicn_strategy_dpo_ctx_get_index (hicn_strategy_ctx);
 
-  init_dpo_ctx (&(hicn_strategy_rr_ctx->default_ctx));
-
-  for (i = 0; i < HICN_PARAM_FIB_ENTRY_NHOPS_MAX && i < nh_len; i++)
-    {
-      clib_memcpy (&hicn_strategy_rr_ctx->default_ctx.next_hops[i],
-		   &next_hop[i], sizeof (dpo_id_t));
-      hicn_strategy_rr_ctx->default_ctx.entry_count++;
-    }
+  init_dpo_ctx (hicn_strategy_ctx, next_hop, nh_len, hicn_dpo_type_rr);
 
   hicn_strategy_rr_ctx->current_nhop = 0;
-
-  return ret;
-}
-
-hicn_dpo_ctx_t *
-hicn_strategy_rr_ctx_get (index_t index)
-{
-  hicn_strategy_rr_ctx_t *hicn_strategy_rr_ctx = NULL;
-  if (!pool_is_free_index (hicn_strategy_rr_ctx_pool, index))
-    {
-      hicn_strategy_rr_ctx =
-	(pool_elt_at_index (hicn_strategy_rr_ctx_pool, index));
-    }
-  return (hicn_dpo_ctx_t *)hicn_strategy_rr_ctx;
 }
 
 int
 hicn_strategy_rr_ctx_add_nh (const dpo_id_t * nh, index_t dpo_idx)
 {
-  hicn_strategy_rr_ctx_t *hicn_strategy_rr_ctx =
-    (hicn_strategy_rr_ctx_t *) hicn_strategy_rr_ctx_get (dpo_idx);
+  hicn_dpo_ctx_t *hicn_strategy_dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
+  u8 pos = 0;
 
-  if (hicn_strategy_rr_ctx == NULL)
+  if (hicn_strategy_dpo_ctx == NULL)
     {
       return HICN_ERROR_STRATEGY_NOT_FOUND;
     }
 
-  int empty = hicn_strategy_rr_ctx->default_ctx.entry_count;
-
-  /* Iterate through the list of faces to add new faces */
-  for (int i = 0; i < hicn_strategy_rr_ctx->default_ctx.entry_count; i++)
-    {
-      if (!memcmp
-          (nh, &hicn_strategy_rr_ctx->default_ctx.next_hops[i],
-           sizeof (dpo_id_t)))
-        {
-          /* If face is marked as deleted, ignore it */
-          hicn_face_t *face =
-            hicn_dpoi_get_from_idx (hicn_strategy_rr_ctx->default_ctx.
-                                    next_hops[i].dpoi_index);
-          if (face->shared.flags & HICN_FACE_FLAGS_DELETED)
-            {
-              continue;
-            }
-          return HICN_ERROR_DPO_CTX_NHOPS_EXISTS;
-        }
-    }
-
-  /* Get an empty place */
-  if (empty > HICN_PARAM_FIB_ENTRY_NHOPS_MAX)
-    {
-      return HICN_ERROR_DPO_CTX_NHOPS_NS;
-    }
-
-  clib_memcpy (&hicn_strategy_rr_ctx->default_ctx.next_hops[empty], nh,
-               sizeof (dpo_id_t));
-  hicn_strategy_rr_ctx->default_ctx.entry_count++;
-
+  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_rr_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx,
-			     fib_prefix_t * fib_pfx)
+hicn_strategy_rr_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx)
 {
-  hicn_strategy_rr_ctx_t *hicn_strategy_rr_ctx =
-    (hicn_strategy_rr_ctx_t *) hicn_strategy_rr_ctx_get (dpo_idx);
-  int ret = HICN_ERROR_DPO_CTX_NOT_FOUND;
-  dpo_id_t invalid = NEXT_HOP_INVALID;
-
-  if (hicn_strategy_rr_ctx == NULL)
-    {
-      return HICN_ERROR_STRATEGY_NOT_FOUND;
-    }
-
-  for (int i = 0; i < hicn_strategy_rr_ctx->default_ctx.entry_count; i++)
-    {
-      if (hicn_strategy_rr_ctx->default_ctx.next_hops[i].dpoi_index ==
-          face_id)
-        {
-          hicn_face_unlock (&hicn_strategy_rr_ctx->
-                            default_ctx.next_hops[i]);
-          hicn_strategy_rr_ctx->default_ctx.entry_count--;
-          hicn_strategy_rr_ctx->default_ctx.next_hops[i] = hicn_strategy_rr_ctx->default_ctx.next_hops[hicn_strategy_rr_ctx->default_ctx.entry_count];
-          hicn_strategy_rr_ctx->default_ctx.next_hops[hicn_strategy_rr_ctx->default_ctx.entry_count] = invalid;
-          ret = HICN_ERROR_NONE;
-          break;
-        }
-    }
-
-  return ret;
+  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);
 }
 
 /*
diff --git a/hicn-plugin/src/strategies/dpo_rr.h b/hicn-plugin/src/strategies/dpo_rr.h
index a12183653..8afd0dabc 100644
--- a/hicn-plugin/src/strategies/dpo_rr.h
+++ b/hicn-plugin/src/strategies/dpo_rr.h
@@ -25,26 +25,10 @@
 
 typedef struct hicn_strategy_rr_ctx_s
 {
-  hicn_dpo_ctx_t default_ctx;
-
   u8 current_nhop;
 } hicn_strategy_rr_ctx_t;
 
 /**
- * @brief Lock the round robin ctx
- *
- * @param dpo Identifier of the dpo of the rr ctx
- */
-void hicn_strategy_rr_ctx_lock (dpo_id_t * dpo);
-
-/**
- * @brief Unlock the round robin ctx
- *
- * @param dpo Identifier of the dpo of the rr ctx
- */
-void hicn_strategy_rr_ctx_unlock (dpo_id_t * dpo);
-
-/**
  * @brief Format the dpo ctx for a human-readable string
  *
  * @param s String to which to append the formatted dpo ctx
@@ -55,8 +39,8 @@ void hicn_strategy_rr_ctx_unlock (dpo_id_t * dpo);
 u8 *format_hicn_strategy_rr_ctx (u8 * s, va_list * ap);
 
 const static dpo_vft_t dpo_strategy_rr_ctx_vft = {
-  .dv_lock = hicn_strategy_rr_ctx_lock,
-  .dv_unlock = hicn_strategy_rr_ctx_unlock,
+  .dv_lock = hicn_strategy_dpo_ctx_lock,
+  .dv_unlock = hicn_strategy_dpo_ctx_unlock,
   .dv_format = format_hicn_strategy_rr_ctx,
 };
 
@@ -77,7 +61,7 @@ hicn_dpo_ctx_t *hicn_strategy_rr_ctx_get (index_t index);
  * @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
  */
-int
+void
 hicn_strategy_rr_ctx_create (dpo_proto_t proto, const dpo_id_t * next_hop,
 			     int nh_len, index_t * dpo_idx);
 
@@ -104,9 +88,7 @@ int hicn_strategy_rr_ctx_add_nh (const dpo_id_t * nh, index_t dpo_idx);
  * @return HICN_ERROR_NONE if the update or insert was fine,
  * otherwise HICN_ERROR_DPO_CTS_NOT_FOUND
  */
-int
-hicn_strategy_rr_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx,
-			     fib_prefix_t * fib_pfx);
+int hicn_strategy_rr_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx);
 
 /**
  * @brief Prefetch a dpo
@@ -115,14 +97,40 @@ hicn_strategy_rr_ctx_del_nh (hicn_face_id_t face_id, index_t dpo_idx,
  */
 void hicn_strategy_rr_ctx_prefetch (index_t dpo_idx);
 
+/**
+ * @brief Return true if the dpo is of type strategy rr
+ *
+ * @param dpo Dpo to check the type
+ */
 int hicn_dpo_is_type_strategy_rr (const dpo_id_t * dpo);
 
+/**
+ * @brief Initialize the Round Robin strategy
+ */
 void hicn_dpo_strategy_rr_module_init (void);
 
+/**
+ * @brief Return the dpo type for the Round Robin strategy
+ */
 dpo_type_t hicn_dpo_strategy_rr_get_type (void);
 
+/**
+ * @brief Format the dpo ctx for the strategy Round Robin
+ *
+ * @param s String to append the formatted dpo ctx
+ * @param ap List of arguments to format
+ */
 u8 *format_hicn_dpo_strategy_rr (u8 * s, va_list * ap);
 
+/**
+ * @brief Format the dpo ctx for the strategy Round Robin. To
+ * call from other functions
+ *
+ * @param s String to append the formatted dpo ctx
+ * @param ... List of arguments to format
+ */
+u8 *hicn_strategy_rr_format_ctx (u8 * s, int n, ...);
+
 
 #endif // __HICN_DPO_RR_H__
 
diff --git a/hicn-plugin/src/strategies/strategy_mw.c b/hicn-plugin/src/strategies/strategy_mw.c
index 40e062bd8..2422d4fed 100644
--- a/hicn-plugin/src/strategies/strategy_mw.c
+++ b/hicn-plugin/src/strategies/strategy_mw.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * Copyright (c) 2017-2020 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:
@@ -12,16 +12,11 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
-#include <vlib/vlib.h>
-#include <vnet/vnet.h>
-
+#include "dpo_mw.h"
 #include "../strategy.h"
 #include "../strategy_dpo_ctx.h"
-#include "dpo_mw.h"
 #include "../faces/face.h"
-#include "../route.h"
-#include "../pcs.h"
+#include "../hashtb.h"
 #include "../strategy_dpo_manager.h"
 
 /* Simple strategy that chooses the next hop with the maximum weight */
@@ -32,20 +27,17 @@ void hicn_on_interest_timeout_mw (index_t dpo_idx);
 u32 hicn_select_next_hop_mw (index_t dpo_idx, int *nh_idx,
 			     dpo_id_t ** outface);
 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);
+
 
 static hicn_strategy_vft_t hicn_strategy_mw_vft = {
   .hicn_receive_data = &hicn_receive_data_mw,
   .hicn_add_interest = &hicn_add_interest_mw,
   .hicn_on_interest_timeout = &hicn_on_interest_timeout_mw,
   .hicn_select_next_hop = &hicn_select_next_hop_mw,
-  .get_strategy_node_index = get_strategy_node_index_mw
-};
-
-/* Stats string values */
-static char *hicn_strategy_error_strings[] = {
-#define _(sym, string) string,
-  foreach_hicnfwd_error
-#undef _
+  .hicn_format_strategy_trace = hicn_strategy_format_trace_mw,
+  .hicn_format_strategy = &hicn_strategy_format_mw
 };
 
 /*
@@ -57,29 +49,22 @@ hicn_mw_strategy_get_vft (void)
   return &hicn_strategy_mw_vft;
 }
 
-/* Registration struct for a graph node */
-vlib_node_registration_t hicn_mw_strategy_node;
-
-u32
-get_strategy_node_index_mw (void)
-{
-  return hicn_mw_strategy_node.index;
-}
-
 /* 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, dpo_id_t ** outface)
 {
-  hicn_strategy_mw_ctx_t *hicn_strategy_mw_ctx =
-    (hicn_strategy_mw_ctx_t *) hicn_strategy_mw_ctx_get (dpo_idx);
+  hicn_dpo_ctx_t *dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
 
-  if(hicn_strategy_mw_ctx == NULL)
+  if (dpo_ctx == NULL)
     return HICN_ERROR_STRATEGY_NOT_FOUND;
 
+  hicn_strategy_mw_ctx_t *hicn_strategy_mw_ctx =
+    (hicn_strategy_mw_ctx_t *) dpo_ctx->data;
+
   u8 next_hop_index = 0;
-  for (int i = 0; i < hicn_strategy_mw_ctx->default_ctx.entry_count; i++)
+  for (int i = 0; i < dpo_ctx->entry_count; i++)
     {
-      if (dpo_id_is_valid (&hicn_strategy_mw_ctx->default_ctx.next_hops[i]))
+      if (dpo_id_is_valid (&dpo_ctx->next_hops[i]))
 	{
 	  if (hicn_strategy_mw_ctx->weight[next_hop_index] <
 	      hicn_strategy_mw_ctx->weight[i])
@@ -89,33 +74,21 @@ hicn_select_next_hop_mw (index_t dpo_idx, int *nh_idx, dpo_id_t ** outface)
 	}
     }
 
-  if (!dpo_id_is_valid
-      (&hicn_strategy_mw_ctx->default_ctx.next_hops[next_hop_index]))
+  if (!dpo_id_is_valid (&dpo_ctx->next_hops[next_hop_index]))
     return HICN_ERROR_STRATEGY_NH_NOT_FOUND;
 
-  *outface =
-    (dpo_id_t *) & hicn_strategy_mw_ctx->default_ctx.
-    next_hops[next_hop_index];
+  *outface = (dpo_id_t *) & dpo_ctx->next_hops[next_hop_index];
 
   return HICN_ERROR_NONE;
 }
 
-uword
-hicn_mw_strategy_node_fn (vlib_main_t * vm,
-			  vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
-  return hicn_forward_interest_fn (vm, node, frame, &hicn_strategy_mw_vft,
-				   hicn_dpo_strategy_mw_get_type (),
-				   &hicn_mw_strategy_node);
-}
-
 void
 hicn_add_interest_mw (index_t dpo_ctx_idx, hicn_hash_entry_t * hash_entry)
 {
   hash_entry->dpo_ctx_id = dpo_ctx_idx;
   dpo_id_t hicn_dpo_id =
     { hicn_dpo_strategy_mw_get_type (), 0, 0, dpo_ctx_idx };
-  hicn_strategy_mw_ctx_lock (&hicn_dpo_id);
+  hicn_strategy_dpo_ctx_lock (&hicn_dpo_id);
   hash_entry->vft_id = hicn_dpo_get_vft_id (&hicn_dpo_id);
 }
 
@@ -132,41 +105,25 @@ hicn_receive_data_mw (index_t dpo_idx, int nh_idx)
 
 
 /* packet trace format function */
-static u8 *
-hicn_strategy_format_trace_mw (u8 * s, va_list * args)
+u8 *
+hicn_strategy_format_trace_mw (u8 * s, hicn_strategy_trace_t * t)
 {
-  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
-  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
-  hicn_strategy_trace_t *t = va_arg (*args, hicn_strategy_trace_t *);
-
   s = format (s, "Strategy_mw: pkt: %d, sw_if_index %d, next index %d",
 	      (int) t->pkt_type, t->sw_if_index, t->next_index);
   return (s);
 }
 
-/*
- * Node registration for the forwarder node
- */
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (hicn_mw_strategy_node) =
+u8 *
+hicn_strategy_format_mw (u8 * s, va_list * ap)
 {
-  .name = "hicn-mw-strategy",
-  .function = hicn_mw_strategy_node_fn,
-  .vector_size = sizeof (u32),
-  .runtime_data_bytes = sizeof (int) + sizeof(hicn_pit_cs_t *),
-  .format_trace = hicn_strategy_format_trace_mw,
-  .type = VLIB_NODE_TYPE_INTERNAL,
-  .n_errors = ARRAY_LEN (hicn_strategy_error_strings),
-  .error_strings = hicn_strategy_error_strings,
-  .n_next_nodes = HICN_STRATEGY_N_NEXT,
-  .next_nodes = {
-    [HICN_STRATEGY_NEXT_INTEREST_HITPIT] = "hicn-interest-hitpit",
-    [HICN_STRATEGY_NEXT_INTEREST_HITCS] = "hicn-interest-hitcs",
-    [HICN_STRATEGY_NEXT_ERROR_DROP] = "error-drop",
-    [HICN_STRATEGY_NEXT_EMPTY] = "ip4-lookup",
-  },
-};
-/* *INDENT-ON* */
+
+  u32 indent = va_arg (*ap, u32);
+  s =
+    format (s,
+	    "Static Weights: weights are updated by the control plane, next hop is the one with the maximum weight.\n",
+	    indent);
+  return (s);
+}
 
 /*
  * fd.io coding-style-patch-verification: ON
diff --git a/hicn-plugin/src/strategies/strategy_mw.h b/hicn-plugin/src/strategies/strategy_mw.h
index 10b08c05f..f64f1fdc7 100644
--- a/hicn-plugin/src/strategies/strategy_mw.h
+++ b/hicn-plugin/src/strategies/strategy_mw.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * Copyright (c) 2017-2020 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:
@@ -18,6 +18,9 @@
 
 #include "../strategy.h"
 
+/**
+ * @brief Return the vft for the Maximum Weight strategy
+ */
 hicn_strategy_vft_t *hicn_mw_strategy_get_vft (void);
 
 #endif // __HICN_STRATEGY_MW_H__
diff --git a/hicn-plugin/src/strategies/strategy_mw_cli.c b/hicn-plugin/src/strategies/strategy_mw_cli.c
index 50d4d21f0..701f96fa7 100644
--- a/hicn-plugin/src/strategies/strategy_mw_cli.c
+++ b/hicn-plugin/src/strategies/strategy_mw_cli.c
@@ -38,8 +38,6 @@ hicn_mw_strategy_cli_set_weight_command_fn (vlib_main_t * vm,
   u32 weight = HICN_PARAM_FIB_ENTRY_NHOP_WGHT_DFLT;
   hicn_dpo_ctx_t *hicn_dpo_ctx;
   const dpo_id_t *hicn_dpo_id;
-  u32 vft_id;
-  const hicn_dpo_vft_t *dpo_vft;
 
   /* Get a line of input. */
   unformat_input_t _line_input, *line_input = &_line_input;
@@ -79,14 +77,14 @@ hicn_mw_strategy_cli_set_weight_command_fn (vlib_main_t * vm,
       goto done;
     }
 
-  prefix.fp_proto = ip46_address_is_ip4(&prefix.fp_addr) ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
+  prefix.fp_proto =
+    ip46_address_is_ip4 (&prefix.
+			 fp_addr) ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
   ret = hicn_route_get_dpo (&prefix, &hicn_dpo_id, &fib_index);
 
   if (ret == HICN_ERROR_NONE)
     {
-      vft_id = hicn_dpo_get_vft_id (hicn_dpo_id);
-      dpo_vft = hicn_dpo_get_vft (vft_id);
-      hicn_dpo_ctx = dpo_vft->hicn_dpo_get_ctx (hicn_dpo_id->dpoi_index);
+      hicn_dpo_ctx = hicn_strategy_dpo_ctx_get (hicn_dpo_id->dpoi_index);
 
       if (hicn_dpo_ctx == NULL
 	  || hicn_dpo_id->dpoi_type != hicn_dpo_strategy_mw_get_type ())
diff --git a/hicn-plugin/src/strategies/strategy_rr.c b/hicn-plugin/src/strategies/strategy_rr.c
index 53b9b688f..cdcca7f2a 100644
--- a/hicn-plugin/src/strategies/strategy_rr.c
+++ b/hicn-plugin/src/strategies/strategy_rr.c
@@ -13,15 +13,11 @@
  * limitations under the License.
  */
 
-#include <vlib/vlib.h>
-#include <vnet/vnet.h>
-
+#include "dpo_rr.h"
 #include "../strategy.h"
 #include "../strategy_dpo_ctx.h"
-#include "dpo_rr.h"
 #include "../faces/face.h"
-#include "../route.h"
-#include "../pcs.h"
+#include "../hashtb.h"
 #include "../strategy_dpo_manager.h"
 
 /* Simple strategy that chooses the next hop with the maximum weight */
@@ -31,21 +27,17 @@ 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,
 			     dpo_id_t ** outface);
-u32 get_strategy_node_index_rr (void);
+u8 *hicn_strategy_format_trace_rr (u8 * s, hicn_strategy_trace_t * t);
+u8 *hicn_strategy_format_rr (u8 * s, va_list * ap);
+
 
 static hicn_strategy_vft_t hicn_strategy_rr_vft = {
   .hicn_receive_data = &hicn_receive_data_rr,
   .hicn_add_interest = &hicn_add_interest_rr,
   .hicn_on_interest_timeout = &hicn_on_interest_timeout_rr,
   .hicn_select_next_hop = &hicn_select_next_hop_rr,
-  .get_strategy_node_index = get_strategy_node_index_rr
-};
-
-/* Stats string values */
-static char *hicn_strategy_error_strings[] = {
-#define _(sym, string) string,
-  foreach_hicnfwd_error
-#undef _
+  .hicn_format_strategy_trace = &hicn_strategy_format_trace_rr,
+  .hicn_format_strategy = &hicn_strategy_format_rr
 };
 
 /*
@@ -57,64 +49,48 @@ hicn_rr_strategy_get_vft (void)
   return &hicn_strategy_rr_vft;
 }
 
-/* Registration struct for a graph node */
-vlib_node_registration_t hicn_rr_strategy_node;
-
-u32
-get_strategy_node_index_rr (void)
-{
-  return hicn_rr_strategy_node.index;
-}
-
 /* 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, dpo_id_t ** outface)
 {
+  hicn_dpo_ctx_t *dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
+
+  if (dpo_ctx == NULL)
+    return HICN_ERROR_STRATEGY_NOT_FOUND;
+
   hicn_strategy_rr_ctx_t *hicn_strategy_rr_ctx =
-    (hicn_strategy_rr_ctx_t *) hicn_strategy_rr_ctx_get (dpo_idx);
+    (hicn_strategy_rr_ctx_t *) dpo_ctx->data;
 
   if (dpo_id_is_valid
-      (&hicn_strategy_rr_ctx->default_ctx.
-       next_hops[hicn_strategy_rr_ctx->current_nhop]))
+      (&dpo_ctx->next_hops[hicn_strategy_rr_ctx->current_nhop]))
     {
       *outface =
-	(dpo_id_t *) & hicn_strategy_rr_ctx->default_ctx.
-	next_hops[hicn_strategy_rr_ctx->current_nhop];
+	(dpo_id_t *) & dpo_ctx->next_hops[hicn_strategy_rr_ctx->current_nhop];
 
     }
   else
     return HICN_ERROR_STRATEGY_NH_NOT_FOUND;
 
   hicn_strategy_rr_ctx->current_nhop =
-    (hicn_strategy_rr_ctx->current_nhop +
-     1) % hicn_strategy_rr_ctx->default_ctx.entry_count;
+    (hicn_strategy_rr_ctx->current_nhop + 1) % dpo_ctx->entry_count;
 
   return HICN_ERROR_NONE;
 }
 
-uword
-hicn_rr_strategy_node_fn (vlib_main_t * vm,
-			  vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
-  return hicn_forward_interest_fn (vm, node, frame, &hicn_strategy_rr_vft,
-				   hicn_dpo_strategy_rr_get_type (),
-				   &hicn_rr_strategy_node);
-}
-
 void
 hicn_add_interest_rr (index_t dpo_ctx_idx, hicn_hash_entry_t * hash_entry)
 {
   hash_entry->dpo_ctx_id = dpo_ctx_idx;
   dpo_id_t hicn_dpo_id =
     { hicn_dpo_strategy_rr_get_type (), 0, 0, dpo_ctx_idx };
-  hicn_strategy_rr_ctx_lock (&hicn_dpo_id);
+  hicn_strategy_dpo_ctx_lock (&hicn_dpo_id);
   hash_entry->vft_id = hicn_dpo_get_vft_id (&hicn_dpo_id);
 }
 
 void
 hicn_on_interest_timeout_rr (index_t dpo_idx)
 {
-  /* Nothign to do in the rr strategy when we receive an interest */
+  /* Nothing to do in the rr strategy when we receive an interest */
 }
 
 void
@@ -124,41 +100,25 @@ hicn_receive_data_rr (index_t dpo_idx, int nh_idx)
 
 
 /* packet trace format function */
-static u8 *
-hicn_strategy_format_trace_rr (u8 * s, va_list * args)
+u8 *
+hicn_strategy_format_trace_rr (u8 * s, hicn_strategy_trace_t * t)
 {
-  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
-  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
-  hicn_strategy_trace_t *t = va_arg (*args, hicn_strategy_trace_t *);
-
   s = format (s, "Strategy_rr: pkt: %d, sw_if_index %d, next index %d",
 	      (int) t->pkt_type, t->sw_if_index, t->next_index);
   return (s);
 }
 
-/*
- * Node registration for the forwarder node
- */
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (hicn_rr_strategy_node) =
+u8 *
+hicn_strategy_format_rr (u8 * s, va_list * ap)
 {
-  .name = "hicn-rr-strategy",
-  .function = hicn_rr_strategy_node_fn,
-  .vector_size = sizeof (u32),
-  .runtime_data_bytes = sizeof (int) + sizeof(hicn_pit_cs_t *),
-  .format_trace = hicn_strategy_format_trace_rr,
-  .type = VLIB_NODE_TYPE_INTERNAL,
-  .n_errors = ARRAY_LEN (hicn_strategy_error_strings),
-  .error_strings = hicn_strategy_error_strings,
-  .n_next_nodes = HICN_STRATEGY_N_NEXT,
-  .next_nodes = {
-    [HICN_STRATEGY_NEXT_INTEREST_HITPIT] = "hicn-interest-hitpit",
-    [HICN_STRATEGY_NEXT_INTEREST_HITCS] = "hicn-interest-hitcs",
-    [HICN_STRATEGY_NEXT_ERROR_DROP] = "error-drop",
-    [HICN_STRATEGY_NEXT_EMPTY] = "ip4-lookup",
-  },
-};
-/* *INDENT-ON* */
+
+  u32 indent = va_arg (*ap, u32);
+  s =
+    format (s,
+	    "Round Robin: next hop is chosen ciclying between all the available next hops, one after the other.\n",
+	    indent);
+  return (s);
+}
 
 /*
  * fd.io coding-style-patch-verification: ON
diff --git a/hicn-plugin/src/strategies/strategy_rr.h b/hicn-plugin/src/strategies/strategy_rr.h
index 84149c36f..3936845fe 100644
--- a/hicn-plugin/src/strategies/strategy_rr.h
+++ b/hicn-plugin/src/strategies/strategy_rr.h
@@ -18,6 +18,9 @@
 
 #include "../strategy.h"
 
+/**
+ * @brief Return the vft for the Round Robin strategy
+ */
 hicn_strategy_vft_t *hicn_rr_strategy_get_vft (void);
 
 #endif // __HICN_STRATEGY_RR_H__