Revert to [HICN-638] Check if systemd is running before enabling hicn-light service

Signed-off-by: Mauro Sardara <msardara@cisco.com>
Change-Id: I1810d96e001a4e6e097e1efa331b682af750925d

9 files changed, 1096 insertions, 0 deletions

diff --git a/hicn-plugin/src/strategies/dpo_mw.c b/hicn-plugin/src/strategies/dpo_mw.c
new file mode 100644
index 000000000..12c77bce8
--- /dev/null
+++ b/hicn-plugin/src/strategies/dpo_mw.c
@@ -0,0 +1,161 @@
+/*
+ * 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:
+ *
+ *     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_mw.h"
+#include "strategy_mw.h"
+#include "../strategy_dpo_manager.h"
+#include "../strategy_dpo_ctx.h"
+
+/**
+ * @brief DPO type value for the mw_strategy
+ */
+static dpo_type_t hicn_dpo_type_mw;
+
+static const hicn_dpo_vft_t hicn_dpo_mw_vft = {
+  .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_format = &hicn_strategy_mw_format_ctx
+};
+
+int
+hicn_dpo_is_type_strategy_mw (const dpo_id_t * dpo)
+{
+  return dpo->dpoi_type == hicn_dpo_type_mw;
+}
+
+void
+hicn_dpo_strategy_mw_module_init (void)
+{
+  /*
+   * Register our type of dpo
+   */
+  hicn_dpo_type_mw =
+    hicn_dpo_register_new_type (hicn_nodes_strategy, &hicn_dpo_mw_vft,
+				hicn_mw_strategy_get_vft (),
+				&dpo_strategy_mw_ctx_vft);
+}
+
+dpo_type_t
+hicn_dpo_strategy_mw_get_type (void)
+{
+  return hicn_dpo_type_mw;
+}
+
+//////////////////////////////////////////////////////////////////////////////////////////////////
+
+
+u8 *
+hicn_strategy_mw_format_ctx (u8 * s, int n, ...)
+{
+  va_list args;
+  va_start (args, n);
+  s = format_hicn_strategy_mw_ctx (s, &args);
+  return s;
+}
+
+u8 *
+format_hicn_strategy_mw_ctx (u8 * s, va_list * ap)
+{
+  int i = 0;
+  index_t index = va_arg (*ap, index_t);
+  hicn_dpo_ctx_t *dpo_ctx = NULL;
+  hicn_strategy_mw_ctx_t *mw_dpo_ctx = NULL;
+  u32 indent = va_arg (*ap, u32);;
+
+  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; 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, "weight %u", mw_dpo_ctx->weight[i]);
+      s = format (s, " %s", buf);
+    }
+
+  return (s);
+}
+
+void
+hicn_strategy_mw_ctx_create (fib_protocol_t proto, const hicn_face_id_t * next_hop,
+			     int nh_len, index_t * dpo_idx)
+{
+  hicn_strategy_mw_ctx_t *hicn_strategy_mw_ctx;
+  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 ();
+  hicn_strategy_mw_ctx = (hicn_strategy_mw_ctx_t *) hicn_strategy_ctx->data;
+
+  *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);
+
+  memset (hicn_strategy_mw_ctx->weight, 0, HICN_PARAM_FIB_ENTRY_NHOPS_MAX);
+}
+
+int
+hicn_strategy_mw_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);
+  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)
+{
+  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);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/hicn-plugin/src/strategies/dpo_mw.h b/hicn-plugin/src/strategies/dpo_mw.h
new file mode 100644
index 000000000..433c415fb
--- /dev/null
+++ b/hicn-plugin/src/strategies/dpo_mw.h
@@ -0,0 +1,149 @@
+/*
+ * 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:
+ *
+ *     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_MW_H__
+#define __HICN_DPO_MW_H__
+
+#include <vnet/dpo/dpo.h>
+#include "../strategy_dpo_ctx.h"
+
+/**
+ * @file dpo_mw.h
+ *
+ * This file implements the strategy vtf (see strategy.h) and
+ * the dpo vft (see strategy_dpo_manager.h) for the strategy
+ * maximum weight
+ */
+
+#define DEFAULT_WEIGHT 0
+
+typedef struct hicn_strategy_mw_ctx_s
+{
+  u8 weight[HICN_PARAM_FIB_ENTRY_NHOPS_MAX];
+} hicn_strategy_mw_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_mw_ctx (u8 * s, va_list * ap);
+
+const static dpo_vft_t dpo_strategy_mw_ctx_vft = {
+  .dv_lock = hicn_strategy_dpo_ctx_lock,
+  .dv_unlock = hicn_strategy_dpo_ctx_unlock,
+  .dv_format = format_hicn_strategy_mw_ctx,
+};
+
+/**
+ * @brief Retrieve an hicn_strategy_mw_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_mw_ctx_get (index_t index);
+
+/**
+ * @brief Create a new mw 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_mw_ctx_create (fib_protocol_t proto, const hicn_face_id_t * next_hop,
+			     int nh_len, index_t * dpo_idx);
+
+/**
+ * @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_mw_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_mw_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_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__
+
+/*
+ * 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
new file mode 100644
index 000000000..adb7e1025
--- /dev/null
+++ b/hicn-plugin/src/strategies/dpo_rr.c
@@ -0,0 +1,160 @@
+/*
+ * 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:
+ *
+ *     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_rr.h"
+#include "strategy_rr.h"
+#include "../strategy_dpo_manager.h"
+#include "../strategy_dpo_ctx.h"
+
+/**
+ * @brief DPO type value for the rr_strategy
+ */
+static dpo_type_t hicn_dpo_type_rr;
+
+static const hicn_dpo_vft_t hicn_dpo_rr_vft = {
+  .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_format = &hicn_strategy_rr_format_ctx
+};
+
+int
+hicn_dpo_is_type_strategy_rr (const dpo_id_t * dpo)
+{
+  return dpo->dpoi_type == hicn_dpo_type_rr;
+}
+
+void
+hicn_dpo_strategy_rr_module_init (void)
+{
+  /*
+   * Register our type of dpo
+   */
+  hicn_dpo_type_rr =
+    hicn_dpo_register_new_type (hicn_nodes_strategy, &hicn_dpo_rr_vft,
+				hicn_rr_strategy_get_vft (),
+				&dpo_strategy_rr_ctx_vft);
+}
+
+dpo_type_t
+hicn_dpo_strategy_rr_get_type (void)
+{
+  return hicn_dpo_type_rr;
+}
+
+//////////////////////////////////////////////////////////////////////////////////////////////////
+
+
+u8 *
+hicn_strategy_rr_format_ctx (u8 * s, int n, ...)
+{
+  va_list args;
+  va_start (args, n);
+  s = format_hicn_strategy_rr_ctx (s, &args);
+  return s;
+}
+
+u8 *
+format_hicn_strategy_rr_ctx (u8 * s, va_list * ap)
+{
+  int i = 0;
+  index_t index = va_arg (*ap, index_t);
+  hicn_dpo_ctx_t *dpo_ctx = NULL;
+  hicn_strategy_rr_ctx_t *rr_dpo_ctx = NULL;
+  u32 indent = va_arg (*ap, u32);
+
+  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_ctx->next_hops[rr_dpo_ctx->current_nhop]);
+
+  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_rr_ctx_create (fib_protocol_t proto, const hicn_face_id_t * next_hop,
+			     int nh_len, index_t * dpo_idx)
+{
+  hicn_strategy_rr_ctx_t *hicn_strategy_rr_ctx;
+  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 ();
+  hicn_strategy_rr_ctx = (hicn_strategy_rr_ctx_t *) hicn_strategy_ctx->data;
+
+  *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);
+
+  hicn_strategy_rr_ctx->current_nhop = 0;
+}
+
+int
+hicn_strategy_rr_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_rr_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_rr.h b/hicn-plugin/src/strategies/dpo_rr.h
new file mode 100644
index 000000000..e4e5b5372
--- /dev/null
+++ b/hicn-plugin/src/strategies/dpo_rr.h
@@ -0,0 +1,152 @@
+/*
+ * 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:
+ *
+ *     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_RR_H__
+#define __HICN_DPO_RR_H__
+
+#include <vnet/dpo/dpo.h>
+#include "../strategy_dpo_ctx.h"
+
+/**
+ * @file dpo_rr.h
+ *
+ * This file implements the strategy vtf (see strategy.h) and
+ * the dpo vft (see strategy_dpo_manager.h) for the strategy
+ * round robin.
+ */
+
+
+/**
+ * Context for the Round Robin strategy
+ */
+
+typedef struct hicn_strategy_rr_ctx_s
+{
+  u8 current_nhop;
+} hicn_strategy_rr_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_rr_ctx (u8 * s, va_list * ap);
+
+const static dpo_vft_t dpo_strategy_rr_ctx_vft = {
+  .dv_lock = hicn_strategy_dpo_ctx_lock,
+  .dv_unlock = hicn_strategy_dpo_ctx_unlock,
+  .dv_format = format_hicn_strategy_rr_ctx,
+};
+
+/**
+ * @brief Retrieve an hicn_strategy_rr_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_rr_ctx_get (index_t index);
+
+/**
+ * @brief Create a new round robin 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_rr_ctx_create (fib_protocol_t proto, const hicn_face_id_t * next_hop,
+			     int nh_len, index_t * dpo_idx);
+
+/**
+ * @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_rr_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_rr_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_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__
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/hicn-plugin/src/strategies/strategy_mw.c b/hicn-plugin/src/strategies/strategy_mw.c
new file mode 100644
index 000000000..fe4d5896a
--- /dev/null
+++ b/hicn-plugin/src/strategies/strategy_mw.c
@@ -0,0 +1,128 @@
+/*
+ * 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:
+ *
+ *     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_mw.h"
+#include "../strategy.h"
+#include "../strategy_dpo_ctx.h"
+#include "../faces/face.h"
+#include "../hashtb.h"
+#include "../strategy_dpo_manager.h"
+
+/* Simple strategy that chooses the next hop with the maximum weight */
+/* It does not require to exend the hicn_dpo */
+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);
+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,
+  .hicn_format_strategy_trace = hicn_strategy_format_trace_mw,
+  .hicn_format_strategy = &hicn_strategy_format_mw
+};
+
+/*
+ * Return the vft of the strategy.
+ */
+hicn_strategy_vft_t *
+hicn_mw_strategy_get_vft (void)
+{
+  return &hicn_strategy_mw_vft;
+}
+
+/* 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_dpo_ctx_t *dpo_ctx = hicn_strategy_dpo_ctx_get (dpo_idx);
+
+  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 < dpo_ctx->entry_count; i++)
+    {
+      if (hicn_strategy_mw_ctx->weight[next_hop_index] <
+          hicn_strategy_mw_ctx->weight[i])
+        {
+          next_hop_index = i;
+        }
+    }
+
+  *outface = dpo_ctx->next_hops[next_hop_index];
+
+  return HICN_ERROR_NONE;
+}
+
+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_dpo_ctx_lock (&hicn_dpo_id);
+  hash_entry->vft_id = hicn_dpo_get_vft_id (&hicn_dpo_id);
+}
+
+void
+hicn_on_interest_timeout_mw (index_t dpo_idx)
+{
+  /* Nothign to do in the mw strategy when we receive an interest */
+}
+
+void
+hicn_receive_data_mw (index_t dpo_idx, int nh_idx)
+{
+}
+
+
+/* packet trace format function */
+u8 *
+hicn_strategy_format_trace_mw (u8 * s, hicn_strategy_trace_t * 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);
+}
+
+u8 *
+hicn_strategy_format_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);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/hicn-plugin/src/strategies/strategy_mw.h b/hicn-plugin/src/strategies/strategy_mw.h
new file mode 100644
index 000000000..9e0078b23
--- /dev/null
+++ b/hicn-plugin/src/strategies/strategy_mw.h
@@ -0,0 +1,41 @@
+/*
+ * 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:
+ *
+ *     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_MW_H__
+#define __HICN_STRATEGY_MW_H__
+
+#include "../strategy.h"
+
+/**
+ * @file strategy_mw.h
+ *
+ * This file implements the maximum weight strategy. In this
+ * strategy the choosen next hop is one with the maximum weight.
+ */
+
+/**
+ * @brief Return the vft for the Maximum Weight strategy
+ */
+hicn_strategy_vft_t *hicn_mw_strategy_get_vft (void);
+
+#endif // __HICN_STRATEGY_MW_H__
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/hicn-plugin/src/strategies/strategy_mw_cli.c b/hicn-plugin/src/strategies/strategy_mw_cli.c
new file mode 100644
index 000000000..636d7effa
--- /dev/null
+++ b/hicn-plugin/src/strategies/strategy_mw_cli.c
@@ -0,0 +1,142 @@
+/*
+ * 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:
+ *
+ *     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 <vnet/vnet.h>
+#include <vnet/dpo/dpo.h>
+#include <vlib/vlib.h>
+#include <vnet/fib/fib_entry.h>
+#include <vnet/fib/fib_table.h>
+
+#include "../strategy_dpo_manager.h"
+#include "../faces/face.h"
+#include "../error.h"
+#include "../route.h"
+#include "dpo_mw.h"
+
+static clib_error_t *
+hicn_mw_strategy_cli_set_weight_command_fn (vlib_main_t * vm,
+					    unformat_input_t * main_input,
+					    vlib_cli_command_t * cmd)
+{
+  clib_error_t *cl_err = 0;
+  int ret = HICN_ERROR_NONE;
+  fib_prefix_t prefix;
+  hicn_face_id_t faceid = HICN_FACE_NULL;
+  u32 fib_index;
+  u32 weight = HICN_PARAM_FIB_ENTRY_NHOP_WGHT_DFLT;
+  hicn_dpo_ctx_t *hicn_dpo_ctx;
+  const dpo_id_t *hicn_dpo_id;
+
+  /* Get a line of input. */
+  unformat_input_t _line_input, *line_input = &_line_input;
+  if (unformat_user (main_input, unformat_line_input, line_input))
+    {
+      while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+	{
+	  if (unformat (line_input, "prefix %U/%u", unformat_ip46_address,
+			&prefix.fp_addr, IP46_TYPE_ANY, &prefix.fp_len))
+	    ;
+	  else if (unformat (line_input, "face %u", &faceid))
+	    ;
+	  else if (unformat (line_input, "weight %u", &weight))
+	    ;
+	  else
+	    {
+	      return clib_error_return (0, "%s",
+					get_error_string
+					(HICN_ERROR_CLI_INVAL));
+	    }
+
+	}
+    }
+
+  if (((weight < 0) || (weight > HICN_PARAM_FIB_ENTRY_NHOP_WGHT_MAX)))
+    {
+      cl_err = clib_error_return (0,
+				  "Next-hop weight must be between 0 and %d",
+				  (int) HICN_PARAM_FIB_ENTRY_NHOP_WGHT_MAX);
+      goto done;
+    }
+
+  if (((ip46_address_is_zero (&prefix.fp_addr)) || faceid == HICN_FACE_NULL))
+    {
+      cl_err =
+	clib_error_return (0, "Please specify prefix and a valid faceid...");
+      goto done;
+    }
+
+  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)
+    {
+      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 ())
+	{
+	  cl_err = clib_error_return (0, get_error_string (ret));
+	  goto done;
+	}
+
+      hicn_strategy_mw_ctx_t *mw_dpo =
+	(hicn_strategy_mw_ctx_t *) hicn_dpo_ctx;
+      int idx = ~0;
+      for (int i = 0; i < hicn_dpo_ctx->entry_count; i++)
+	if (hicn_dpo_ctx->next_hops[i] == faceid)
+	  idx = i;
+
+      if (idx == ~0)
+	{
+	  cl_err =
+	    clib_error_return (0,
+			       get_error_string
+			       (HICN_ERROR_STRATEGY_NH_NOT_FOUND));
+	  goto done;
+	}
+
+      mw_dpo->weight[idx] = weight;
+    }
+  else
+    {
+      cl_err = clib_error_return (0, get_error_string (ret));
+
+    }
+
+done:
+
+  return (cl_err);
+
+}
+
+/* cli declaration for 'strategy mw' */
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND(hicn_mw_strategy_cli_set_weight_command, static)=
+{
+  .path = "hicn strategy mw set",
+  .short_help = "hicn strategy mw set prefix <prefix> face <face_id> weight <weight>",
+  .function = hicn_mw_strategy_cli_set_weight_command_fn,
+};
+/* *INDENT-ON* */
+
+/*
+ * 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
new file mode 100644
index 000000000..4c65ce52a
--- /dev/null
+++ b/hicn-plugin/src/strategies/strategy_rr.c
@@ -0,0 +1,122 @@
+/*
+ * 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:
+ *
+ *     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_rr.h"
+#include "../strategy.h"
+#include "../strategy_dpo_ctx.h"
+#include "../faces/face.h"
+#include "../hashtb.h"
+#include "../strategy_dpo_manager.h"
+
+/* Simple strategy that chooses the next hop with the maximum weight */
+/* It does not require to exend the hicn_dpo */
+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);
+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,
+  .hicn_format_strategy_trace = &hicn_strategy_format_trace_rr,
+  .hicn_format_strategy = &hicn_strategy_format_rr
+};
+
+/*
+ * Return the vft of the strategy.
+ */
+hicn_strategy_vft_t *
+hicn_rr_strategy_get_vft (void)
+{
+  return &hicn_strategy_rr_vft;
+}
+
+/* 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_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 *) dpo_ctx->data;
+
+  *outface =
+    dpo_ctx->next_hops[hicn_strategy_rr_ctx->current_nhop];
+
+  hicn_strategy_rr_ctx->current_nhop =
+    (hicn_strategy_rr_ctx->current_nhop + 1) % dpo_ctx->entry_count;
+
+  return HICN_ERROR_NONE;
+}
+
+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_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)
+{
+  /* Nothing to do in the rr strategy when we receive an interest */
+}
+
+void
+hicn_receive_data_rr (index_t dpo_idx, int nh_idx)
+{
+}
+
+
+/* packet trace format function */
+u8 *
+hicn_strategy_format_trace_rr (u8 * s, hicn_strategy_trace_t * 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);
+}
+
+u8 *
+hicn_strategy_format_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);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/hicn-plugin/src/strategies/strategy_rr.h b/hicn-plugin/src/strategies/strategy_rr.h
new file mode 100644
index 000000000..4dfe76b43
--- /dev/null
+++ b/hicn-plugin/src/strategies/strategy_rr.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2017-2019 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_RR_H__
+#define __HICN_STRATEGY_RR_H__
+
+#include "../strategy.h"
+
+/**
+ * @file strategy_rr.h
+ *
+ * This file implements the round robin strategy. In this
+ * strategy the next hop is choosen in a round robin way.
+ */
+
+/**
+ * @brief Return the vft for the Round Robin strategy
+ */
+hicn_strategy_vft_t *hicn_rr_strategy_get_vft (void);
+
+#endif // __HICN_STRATEGY_RR_H__
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */