[HICN-90] adding hicn-light to sysrepo-plugins

Change-Id: Icd92adb21661d33b0cd40ea8c3dd748f0fa97aaf
Signed-off-by: Masoud Hemmatpour <mhemmatp@cisco.com>
Signed-off-by: Luca Muscariello <lumuscar+fdio@cisco.com>
Signed-off-by: Masoud Hemmatpour <mhemmatp@cisco.com>

4 files changed, 1465 insertions, 0 deletions

diff --git a/utils/sysrepo-plugins/hicn-plugin/plugin/model/hicn_model.c b/utils/sysrepo-plugins/hicn-plugin/plugin/model/hicn_model.c
new file mode 100644
index 000000000..340d403fb
--- /dev/null
+++ b/utils/sysrepo-plugins/hicn-plugin/plugin/model/hicn_model.c
@@ -0,0 +1,1323 @@
+/*
+ * Copyright (c) 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.
+ */
+#include <stdio.h>
+#include <malloc.h>
+#include <sysrepo/xpath.h>
+#include <inttypes.h>
+/* Hicn headers */
+
+#include <vapi/hicn.api.vapi.h>
+#include <hicn/api/ip_address.h>
+#include "../hicn_plugin.h"
+#include "../hicn_vpp_comm.h"
+#include "hicn_model.h"
+#include "tlock.h"
+
+
+//vapi_ctx_t g_vapi_ctx_instance=NULL;
+
+// Shared local variables between state and RPCs
+
+volatile hicn_state_t  * hicn_state = NULL;
+volatile hicn_strategy_t * hicn_strategy = NULL;
+volatile hicn_strategies_t * hicn_strategies =NULL;
+volatile hicn_route_t * hicn_route = NULL;
+volatile hicn_face_ip_params_t *  hicn_face_ip_params = NULL;
+
+static int init_buffer(void){
+
+  hicn_state = memalign(MEM_ALIGN, sizeof(hicn_state_t) );
+  memset((hicn_state_t *)hicn_state, 0 , sizeof(hicn_state_t) );
+  hicn_strategy = memalign(MEM_ALIGN, sizeof(hicn_strategy_t) );
+  memset((hicn_strategy_t *) hicn_strategy, 0 , sizeof(hicn_strategy_t) );
+  hicn_strategies = memalign(MEM_ALIGN, sizeof(hicn_strategies_t) );
+  memset((hicn_strategies_t *) hicn_strategies, 0 , sizeof(hicn_strategies_t) );
+  hicn_route = memalign(MEM_ALIGN, sizeof(hicn_route_t) );
+  memset((hicn_route_t *) hicn_route, 0 , sizeof(hicn_route_t) );
+  hicn_face_ip_params = memalign(MEM_ALIGN, sizeof(hicn_face_ip_params_t) );
+  memset((hicn_face_ip_params_t *) hicn_face_ip_params, 0 , sizeof(hicn_face_ip_params_t) );
+  int retval=-1;
+  ARG_CHECK5(retval, hicn_state, hicn_strategy, hicn_strategies, hicn_route, hicn_face_ip_params);
+  retval=0;
+  return retval;
+}
+
+  static inline void  state_update(sr_val_t * vals ){
+  sr_val_set_xpath(&vals[0], "/hicn:hicn-state/states/pkts_processed");
+  vals[0].type = SR_UINT64_T;
+  vals[0].data.uint64_val = hicn_state->pkts_processed;
+
+  sr_val_set_xpath(&vals[1], "/hicn:hicn-state/states/pkts_interest_count");
+  vals[1].type = SR_UINT64_T;
+  vals[1].data.uint64_val = hicn_state->pkts_interest_count;
+
+  sr_val_set_xpath(&vals[2], "/hicn:hicn-state/states/pkts_data_count");
+  vals[2].type = SR_UINT64_T;
+  vals[2].data.uint64_val = hicn_state->pkts_data_count;
+
+  sr_val_set_xpath(&vals[3], "/hicn:hicn-state/states/pkts_from_cache_count");
+  vals[3].type = SR_UINT64_T;
+  vals[3].data.uint64_val = hicn_state->pkts_from_cache_count;
+
+  sr_val_set_xpath(&vals[4], "/hicn:hicn-state/states/pkts_no_pit_count");
+  vals[4].type = SR_UINT64_T;
+  vals[4].data.uint64_val = hicn_state->pkts_no_pit_count;
+
+  sr_val_set_xpath(&vals[5], "/hicn:hicn-state/states/pit_expired_count");
+  vals[5].type = SR_UINT64_T;
+  vals[5].data.uint64_val = hicn_state->pit_expired_count;
+
+  sr_val_set_xpath(&vals[6], "/hicn:hicn-state/states/cs_expired_count");
+  vals[6].type = SR_UINT64_T;
+  vals[6].data.uint64_val = hicn_state->cs_expired_count;
+
+  sr_val_set_xpath(&vals[7], "/hicn:hicn-state/states/cs_lru_count");
+  vals[7].type = SR_UINT64_T;
+  vals[7].data.uint64_val = hicn_state->cs_lru_count;
+
+  sr_val_set_xpath(&vals[8], "/hicn:hicn-state/states/pkts_drop_no_buf");
+  vals[8].type = SR_UINT64_T;
+  vals[8].data.uint64_val = hicn_state->pkts_drop_no_buf;
+
+  sr_val_set_xpath(&vals[9], "/hicn:hicn-state/states/interests_aggregated");
+  vals[9].type = SR_UINT64_T;
+  vals[9].data.uint64_val = hicn_state->interests_aggregated;
+
+  sr_val_set_xpath(&vals[10], "/hicn:hicn-state/states/interests_retx");
+  vals[10].type = SR_UINT64_T;
+  vals[10].data.uint64_val = hicn_state->interests_retx;
+
+  sr_val_set_xpath(&vals[11],
+                   "/hicn:hicn-state/states/interests_hash_collision");
+  vals[11].type = SR_UINT64_T;
+  vals[11].data.uint64_val = hicn_state->interests_hash_collision;
+
+  sr_val_set_xpath(&vals[12], "/hicn:hicn-state/states/pit_entries_count");
+  vals[12].type = SR_UINT64_T;
+  vals[12].data.uint64_val = hicn_state->pit_entries_count;
+
+  sr_val_set_xpath(&vals[13], "/hicn:hicn-state/states/cs_entries_count");
+  vals[13].type = SR_UINT64_T;
+  vals[13].data.uint64_val = hicn_state->cs_entries_count;
+
+  sr_val_set_xpath(&vals[14], "/hicn:hicn-state/states/cs_entries_ntw_count");
+  vals[14].type = SR_UINT64_T;
+  vals[14].data.uint64_val = hicn_state->cs_entries_ntw_count;
+}
+
+
+static inline void  strategy_update(sr_val_t * vals ){
+  sr_val_set_xpath(&vals[0], "/hicn:hicn-state/strategy/description");
+  vals[0].type = SR_UINT8_T;
+  vals[0].data.uint8_val = hicn_strategy->description[0];
+}
+
+static inline void  strategies_update(sr_val_t * vals ){
+  sr_val_set_xpath(&vals[0], "/hicn:hicn-state/strategies/n_strategies");
+  vals[0].type = SR_UINT8_T;
+  vals[0].data.uint8_val = hicn_strategies->n_strategies;
+
+  sr_val_set_xpath(&vals[1], "/hicn:hicn-state/strategies/strategy_id");
+  vals[1].type = SR_UINT32_T;
+  vals[1].data.uint32_val = hicn_strategies->strategy_id[0];
+
+}
+
+static inline void  route_update(sr_val_t * vals ){
+  sr_val_set_xpath(&vals[0], "/hicn:hicn-state/route/faceids");
+  vals[0].type = SR_UINT16_T;
+  vals[0].data.uint16_val = hicn_route->faceids[0];
+
+  sr_val_set_xpath(&vals[1], "/hicn:hicn-state/route/strategy_id");
+  vals[1].type = SR_UINT32_T;
+  vals[1].data.uint32_val = hicn_route->strategy_id;
+}
+
+static inline void  face_ip_params_update(sr_val_t * vals ){
+  sr_val_set_xpath(&vals[0], "/hicn:hicn-state/face-ip-params/nh_addr");
+  vals[0].type = SR_UINT64_T;
+  vals[0].data.uint64_val = hicn_face_ip_params->nh_addr[0];
+
+  sr_val_set_xpath(&vals[1], "/hicn:hicn-state/face-ip-params/swif");
+  vals[1].type = SR_UINT32_T;
+  vals[1].data.uint32_val = hicn_face_ip_params->swif;
+
+  sr_val_set_xpath(&vals[2], "/hicn:hicn-state/face-ip-params/flags");
+  vals[2].type = SR_UINT32_T;
+  vals[2].data.uint32_val = hicn_face_ip_params->flags;
+}
+
+
+static int hicn_state_states_cb(const char *xpath, sr_val_t **values,
+                         size_t *values_cnt, uint64_t request_id,
+                         const char *original_xpath, void *private_ctx) {
+  sr_val_t *vals;
+  int rc;
+  enum locks_name state;
+  state=lstate;
+  SRP_LOG_DBG("Requesting state data for '%s'", xpath);
+
+  if (!sr_xpath_node_name_eq(xpath, "states")) {
+    *values = NULL;
+    *values_cnt = 0;
+    return SR_ERR_OK;
+  }
+
+  rc = sr_new_values(NSTATE_LEAVES, &vals);
+  if (SR_ERR_OK != rc) {
+    return rc;
+  }
+
+  SRP_LOG_DBG("Requesting state data for '%s'", xpath);
+  Ticket_Lock(state);
+  state_update(vals);
+  Ticket_Unlock(state);
+
+  *values = vals;
+  *values_cnt = NSTATE_LEAVES;
+/*
+  pthread_t state_tid;
+  rc = pthread_create((pthread_t *)&state_tid, NULL, state_thread, NULL);
+  if (rc != 0) {
+        SRP_LOG_DBG_MSG("Error making hicn state thread");
+        return SR_ERR_OPERATION_FAILED;
+  }
+*/
+  return SR_ERR_OK;
+}
+
+static int hicn_state_strategy_cb(const char *xpath, sr_val_t **values,
+                         size_t *values_cnt, uint64_t request_id,
+                         const char *original_xpath, void *private_ctx) {
+  sr_val_t *vals;
+  int rc;
+  enum locks_name strategy;
+  strategy=lstrategy;
+
+  if (!sr_xpath_node_name_eq(xpath, "strategy")) {
+    *values = NULL;
+    *values_cnt = 0;
+    return SR_ERR_OK;
+  }
+
+
+  rc = sr_new_values(NSTRATEGY_LEAVES, &vals);
+  if (SR_ERR_OK != rc) {
+    return rc;
+  }
+
+  SRP_LOG_DBG("Requesting state data for '%s'", xpath);
+  Ticket_Lock(strategy);
+  strategy_update(vals);
+  Ticket_Unlock(strategy);
+
+  *values = vals;
+  *values_cnt = NSTRATEGY_LEAVES;
+  return SR_ERR_OK;
+
+  }
+
+static int hicn_state_strategies_cb(const char *xpath, sr_val_t **values,
+                         size_t *values_cnt, uint64_t request_id,
+                         const char *original_xpath, void *private_ctx) {
+  sr_val_t *vals;
+  int rc;
+  enum locks_name strategies;
+  strategies=lstrategies;
+
+
+
+  if (! sr_xpath_node_name_eq(xpath, "strategies")) {
+    SRP_LOG_DBG_MSG("Requesting state is not for strategies");
+    *values = NULL;
+    *values_cnt = 0;
+    return SR_ERR_OK;
+  }
+
+
+  rc = sr_new_values(NSTRATEGIES_LEAVES, &vals);
+  if (SR_ERR_OK != rc) {
+    return rc;
+  }
+
+  SRP_LOG_DBG("Requesting state data for '%s'", xpath);
+  Ticket_Lock(strategies);
+  strategies_update(vals);
+  Ticket_Unlock(strategies);
+
+  *values = vals;
+  *values_cnt = NSTRATEGIES_LEAVES;
+  return SR_ERR_OK;
+
+  }
+
+
+static int hicn_state_route_cb(const char *xpath, sr_val_t **values,
+                         size_t *values_cnt, uint64_t request_id,
+                         const char *original_xpath, void *private_ctx) {
+  sr_val_t *vals;
+  int rc;
+  enum locks_name route;
+  route=lroute;
+
+
+  if (! sr_xpath_node_name_eq(xpath, "route")) {
+    SRP_LOG_DBG_MSG("Requesting state is not for route");
+    *values = NULL;
+    *values_cnt = 0;
+    return SR_ERR_OK;
+  }
+
+  rc = sr_new_values(NROUTE_LEAVES, &vals);
+  if (SR_ERR_OK != rc) {
+    return rc;
+  }
+
+  SRP_LOG_DBG("Requesting state data for '%s'", xpath);
+  Ticket_Lock(route);
+  route_update(vals);
+  Ticket_Unlock(route);
+
+  *values = vals;
+  *values_cnt = NROUTE_LEAVES;
+  return SR_ERR_OK;
+
+  }
+
+
+  static int hicn_state_face_ip_params_cb(const char *xpath, sr_val_t **values,
+                         size_t *values_cnt, uint64_t request_id,
+                         const char *original_xpath, void *private_ctx) {
+  sr_val_t *vals;
+  int rc;
+  enum locks_name face_ip_params;
+  face_ip_params=lface_ip_params;
+
+
+
+  if (! sr_xpath_node_name_eq(xpath, "face-ip-params")) {
+    SRP_LOG_DBG_MSG("Requesting state is not for face-ip-params");
+    *values = NULL;
+    *values_cnt = 0;
+    return SR_ERR_OK;
+  }
+
+  rc = sr_new_values(NFACE_IP_PARAMS_LEAVES, &vals);
+  if (SR_ERR_OK != rc) {
+    return rc;
+  }
+
+  SRP_LOG_DBG("Requesting state data for '%s'", xpath);
+  Ticket_Lock(face_ip_params);
+  face_ip_params_update(vals);
+  Ticket_Unlock(face_ip_params);
+
+  *values = vals;
+  *values_cnt = NFACE_IP_PARAMS_LEAVES;
+  return SR_ERR_OK;
+
+  }
+
+
+static int params_send(vapi_msg_hicn_api_node_params_set *msg,
+                       vapi_msg_hicn_api_node_params_set_reply *resp) {
+  vapi_msg_hicn_api_node_params_set_hton(msg);
+  if (VAPI_OK != vapi_send(g_vapi_ctx_instance, msg)) {
+    SRP_LOG_DBG_MSG("Sending msg to VPP failed");
+    return SR_ERR_OPERATION_FAILED;
+  }
+  HICN_VPP_VAPI_RECV;
+  SRP_LOG_DBG_MSG("state data are updated successfully");
+  return SR_ERR_OK;
+}
+
+/**
+ * @brief Callback to be called by any config change of "/hicn:/" leaf.
+ */
+static int hicn_node_params_set_cb(sr_session_ctx_t *session, const char *xpath,
+                                   sr_notif_event_t event, void *private_ctx) {
+  sr_change_iter_t *iter = NULL;
+  sr_change_oper_t op = SR_OP_CREATED;
+  sr_val_t *old_val = NULL;
+  sr_val_t *new_val = NULL;
+  sr_xpath_ctx_t xpath_ctx = {
+      0,
+  };
+  int rc = SR_ERR_OK, op_rc = SR_ERR_OK;
+  // no-op for apply, we only care about SR_EV_ENABLED, SR_EV_VERIFY,
+  // SR_EV_ABORT
+  if (SR_EV_APPLY == event) {
+    return SR_ERR_OK;
+  }
+
+  // get changes iterator
+  rc = sr_get_changes_iter(session, xpath, &iter);
+  if (SR_ERR_OK != rc) {
+    SRP_LOG_ERR("Unable to retrieve change iterator: %s", sr_strerror(rc));
+    return rc;
+  }
+
+  vapi_msg_hicn_api_node_params_set *msg;
+  vapi_msg_hicn_api_node_params_set_reply *resp = NULL;
+  msg = vapi_alloc_hicn_api_node_params_set(g_vapi_ctx_instance);
+  // iterate over all changes
+  while ((SR_ERR_OK == op_rc || event == SR_EV_ABORT) &&
+         (SR_ERR_OK ==
+          (rc = sr_get_change_next(session, iter, &op, &old_val, &new_val)))) {
+    if (!strcmp(new_val->xpath, "/hicn:hicn-conf/params/enable_disable")) {
+      SRP_LOG_DBG("A change detected in '%s', op=%d",
+                  new_val ? new_val->xpath : old_val->xpath,
+                  new_val->data.bool_val);
+      msg->payload.enable_disable = new_val->data.bool_val;
+    } else if (!strcmp(new_val->xpath, "/hicn:hicn-conf/params/pit_max_size")) {
+      SRP_LOG_DBG("A change detected in '%s', op=%d",
+                  new_val ? new_val->xpath : old_val->xpath,
+                  new_val->data.int32_val);
+      msg->payload.pit_max_size = new_val->data.int32_val;
+    } else if (!strcmp(new_val->xpath, "/hicn:hicn-conf/params/cs_max_size")) {
+      SRP_LOG_DBG("A change detected in '%s', op=%d",
+                  new_val ? new_val->xpath : old_val->xpath,
+                  new_val->data.int32_val);
+      msg->payload.cs_max_size = new_val->data.int32_val;
+    } else if (!strcmp(new_val->xpath,
+                       "/hicn:hicn-conf/params/cs_reserved_app")) {
+      SRP_LOG_DBG("A change detected in '%s', op=%d",
+                  new_val ? new_val->xpath : old_val->xpath,
+                  new_val->data.int32_val);
+      msg->payload.cs_reserved_app = new_val->data.int32_val;
+    } else if (!strcmp(new_val->xpath,
+                       "/hicn:hicn-conf/params/pit_dflt_lifetime_sec")) {
+      SRP_LOG_DBG("A change detected in '%s', op=%d",
+                  new_val ? new_val->xpath : old_val->xpath,
+                  new_val->data.decimal64_val);
+      msg->payload.pit_dflt_lifetime_sec = new_val->data.decimal64_val;
+    } else if (!strcmp(new_val->xpath,
+                       "/hicn:hicn-conf/params/pit_min_lifetime_sec")) {
+      SRP_LOG_DBG("A change detected in '%s', op=%d",
+                  new_val ? new_val->xpath : old_val->xpath,
+                  new_val->data.decimal64_val);
+      msg->payload.pit_min_lifetime_sec = new_val->data.decimal64_val;
+    } else if (!strcmp(new_val->xpath,
+                       "/hicn:hicn-conf/params/pit_max_lifetime_sec")) {
+      SRP_LOG_DBG("A change detected in '%s', op=%d",
+                  new_val ? new_val->xpath : old_val->xpath,
+                  new_val->data.decimal64_val);
+      msg->payload.pit_max_lifetime_sec = new_val->data.decimal64_val;
+    }
+
+    switch (op) {
+      case SR_OP_CREATED:
+      case SR_OP_MODIFIED:
+        op_rc = SR_ERR_OK;  // OK
+        break;
+      case SR_OP_DELETED:
+        op_rc = SR_ERR_OPERATION_FAILED;  // ERROR
+        break;
+      default:
+        break;
+    }
+    sr_xpath_recover(&xpath_ctx);
+    if (SR_ERR_INVAL_ARG == op_rc) {
+      sr_set_error(session, "You are not allowed to change the schema.",
+                   new_val ? new_val->xpath : old_val->xpath);
+    }
+    sr_free_val(old_val);
+    sr_free_val(new_val);
+  }
+
+  params_send(msg, resp);
+
+  sr_free_change_iter(iter);
+  SRP_LOG_DBG_MSG("Configuration applied successfully");
+  return SR_ERR_OK;
+}
+
+/**
+ * @brief API to get hicn param in vpp.
+ */
+static int hicn_node_params_get_cb(const char *xpath, const sr_val_t *input,
+                                   const size_t input_cnt, sr_val_t **output,
+                                   size_t *output_cnt, void *private_ctx) {
+
+  SRP_LOG_DBG_MSG("hicn node parameter received successfully");
+  vapi_msg_hicn_api_node_params_get *msg;
+  vapi_msg_hicn_api_node_params_get_reply *resp;
+
+  msg = vapi_alloc_hicn_api_node_params_get(g_vapi_ctx_instance);
+  vapi_msg_hicn_api_node_params_get_hton(msg);
+   SRP_LOG_DBG("msg id:%d",msg->header._vl_msg_id);
+
+
+  if (VAPI_OK != vapi_send(g_vapi_ctx_instance, msg)) {
+    SRP_LOG_DBG_MSG("Sending msg to VPP failed");
+    return SR_ERR_OPERATION_FAILED;
+  }
+
+  HICN_VPP_VAPI_RECV;
+
+  vapi_msg_hicn_api_node_params_get_reply_ntoh(resp);
+
+
+  if(!resp->payload.retval){
+      SRP_LOG_DBG_MSG("Successfully Done");
+      SRP_LOG_DBG("Pit Max entries: %d",resp->payload.pit_max_size);
+      return SR_ERR_OK;
+  }
+  SRP_LOG_DBG_MSG("Operation Failed");
+  return SR_ERR_OPERATION_FAILED;
+}
+
+/**
+ * @brief API to get hicn stat in vpp.
+ */
+static int hicn_node_stat_get_cb(const char *xpath, const sr_val_t *input,
+                                 const size_t input_cnt, sr_val_t **output,
+                                 size_t *output_cnt, void *private_ctx) {
+
+  SRP_LOG_DBG_MSG("hicn status received successfully");
+  vapi_msg_hicn_api_node_stats_get *msg;
+  vapi_msg_hicn_api_node_stats_get_reply *resp;
+  enum locks_name state;
+  state=lstate;
+
+  //vapi_msg_id_hicn_api_node_stats_get=103;
+  msg = vapi_alloc_hicn_api_node_stats_get(g_vapi_ctx_instance);
+  vapi_msg_hicn_api_node_stats_get_hton(msg);
+
+  if (VAPI_OK != vapi_send(g_vapi_ctx_instance, msg)) {
+    SRP_LOG_DBG_MSG("Sending msg to VPP failed");
+    return SR_ERR_OPERATION_FAILED;
+  }
+
+  HICN_VPP_VAPI_RECV;
+  vapi_msg_hicn_api_node_stats_get_reply_ntoh(resp);
+
+  if(resp->payload.retval){
+      SRP_LOG_DBG_MSG("Error updating state");
+      return SR_ERR_OPERATION_FAILED;
+  }
+  Ticket_Lock(state);
+ // hicn_state = (hicn_state_t *) resp->payload;
+  hicn_state->pkts_processed = resp->payload.pkts_processed;
+  hicn_state->pkts_interest_count = resp->payload.pkts_interest_count;
+  hicn_state->pkts_data_count = resp->payload.pkts_data_count;
+  hicn_state->pkts_from_cache_count = resp->payload.pkts_from_cache_count;
+  hicn_state->pkts_no_pit_count = resp->payload.pkts_no_pit_count;
+  hicn_state->pit_expired_count = resp->payload.pit_expired_count;
+  hicn_state->cs_expired_count = resp->payload.cs_expired_count;
+  hicn_state->cs_lru_count = resp->payload.cs_lru_count;
+  hicn_state->pkts_drop_no_buf = resp->payload.pkts_drop_no_buf;
+  hicn_state->interests_aggregated = resp->payload.interests_aggregated;
+  hicn_state->interests_retx = resp->payload.interests_retx;
+ // hicn_state->interests_hash_collision = resp->payload.interests_hash_collision;
+  hicn_state->pit_entries_count = resp->payload.pit_entries_count;
+  hicn_state->cs_entries_count = resp->payload.cs_entries_count;
+  hicn_state->cs_entries_ntw_count = resp->payload.cs_entries_ntw_count;
+  Ticket_Unlock(state);
+
+  return SR_ERR_OK;
+
+}
+
+/**
+ * @brief API to get hicn strategy in vpp.
+ */
+static int hicn_strategy_get_cb(const char *xpath, const sr_val_t *input,
+                                const size_t input_cnt, sr_val_t **output,
+                                size_t *output_cnt, void *private_ctx) {
+
+  SRP_LOG_DBG_MSG("hicn strategy receive successfully");
+  // allocate memory msg and resp
+  vapi_msg_hicn_api_strategy_get *msg;
+  vapi_msg_hicn_api_strategy_get_reply *resp;
+
+  msg = vapi_alloc_hicn_api_strategy_get(g_vapi_ctx_instance);
+   SRP_LOG_DBG("msg id:%d",msg->header._vl_msg_id);
+
+  msg->payload.strategy_id = input[0].data.uint32_val;
+
+  vapi_msg_hicn_api_strategy_get_hton(msg);
+
+  if (VAPI_OK != vapi_send(g_vapi_ctx_instance, msg)) {
+    SRP_LOG_DBG_MSG("Sending msg to VPP failed");
+    return SR_ERR_OPERATION_FAILED;
+  }
+
+  HICN_VPP_VAPI_RECV;
+
+  vapi_msg_hicn_api_strategy_get_reply_ntoh(resp);
+
+  if(!resp->payload.retval){
+      SRP_LOG_DBG_MSG("Successfully Done");
+      return SR_ERR_OK;
+  }
+
+  SRP_LOG_DBG_MSG("Operation Failed");
+  return SR_ERR_OPERATION_FAILED;
+}
+
+/**
+ * @brief API to get hicn strategies in vpp.
+ */
+static int hicn_strategies_get_cb(const char *xpath, const sr_val_t *input,
+                                  const size_t input_cnt, sr_val_t **output,
+                                  size_t *output_cnt, void *private_ctx) {
+
+  SRP_LOG_DBG_MSG("hicn strategies received successfully");
+  // allocate memory msg and resp
+  vapi_msg_hicn_api_strategies_get *msg;
+  vapi_msg_hicn_api_strategies_get_reply *resp;
+
+  msg = vapi_alloc_hicn_api_strategies_get(g_vapi_ctx_instance);
+   SRP_LOG_DBG("msg id:%d",msg->header._vl_msg_id);
+  vapi_msg_hicn_api_strategies_get_hton(msg);
+
+  if (VAPI_OK != vapi_send(g_vapi_ctx_instance, msg)) {
+    SRP_LOG_DBG_MSG("Sending msg to VPP failed");
+    return SR_ERR_OPERATION_FAILED;
+  }
+
+  HICN_VPP_VAPI_RECV;
+
+  vapi_msg_hicn_api_strategies_get_reply_ntoh(resp);
+
+  if(!resp->payload.retval){
+      SRP_LOG_DBG_MSG("Successfully Done");
+      return SR_ERR_OK;
+  }
+
+  SRP_LOG_DBG_MSG("Operation Failed");
+  return SR_ERR_OPERATION_FAILED;
+}
+
+/**
+ * @brief API to get hicn route in vpp.
+ */
+static int hicn_route_get_cb(const char *xpath, const sr_val_t *input,
+                             const size_t input_cnt, sr_val_t **output,
+                             size_t *output_cnt, void *private_ctx) {
+
+  SRP_LOG_DBG_MSG("hicn route receive successfully");
+  // allocate memory msg and resp
+  vapi_msg_hicn_api_route_get *msg;
+  vapi_msg_hicn_api_route_get_reply *resp;
+
+  msg = vapi_alloc_hicn_api_route_get(g_vapi_ctx_instance);
+   SRP_LOG_DBG("msg id:%d",msg->header._vl_msg_id);
+
+
+  if(strcmp(input[0].data.string_val,"-1")){
+
+    struct sockaddr_in sa;
+    // store this IP address in sa:
+    inet_pton(AF_INET,  input[0].data.string_val, &(sa.sin_addr));
+    unsigned char * temp = (unsigned char *) &sa.sin_addr.s_addr;
+    memcpy(&msg->payload.prefix[0],temp,4);
+
+
+  }else if(strcmp(input[1].data.string_val,"-1")){
+
+    void *dst = malloc(sizeof(struct in6_addr));
+    inet_pton(AF_INET6, input[1].data.string_val, dst);
+    unsigned char * temp = (unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+    memcpy(&msg->payload.prefix[0],temp,8);
+    memcpy(&msg->payload.prefix[1],temp+8,8);
+
+  }else{
+      SRP_LOG_DBG_MSG("Invalid local IP address");
+      return SR_ERR_OPERATION_FAILED;
+  }
+
+
+
+  msg->payload.len = input[2].data.uint8_val;
+
+  vapi_msg_hicn_api_route_get_hton(msg);
+
+  if (VAPI_OK != vapi_send(g_vapi_ctx_instance, msg)) {
+    SRP_LOG_DBG_MSG("Sending msg to VPP failed");
+    return SR_ERR_OPERATION_FAILED;
+  }
+
+  HICN_VPP_VAPI_RECV;
+
+  vapi_msg_hicn_api_route_get_reply_ntoh(resp);
+
+  if(!resp->payload.retval){
+      SRP_LOG_DBG_MSG("Successfully Done");
+      return SR_ERR_OK;
+  }
+
+  SRP_LOG_DBG_MSG("Operation Failed");
+  return SR_ERR_OPERATION_FAILED;
+}
+
+/**
+ * @brief API to add hicn route nhops in vpp.
+ */
+static int hicn_route_nhops_add_cb(const char *xpath, const sr_val_t *input,
+                                   const size_t input_cnt, sr_val_t **output,
+                                   size_t *output_cnt, void *private_ctx) {
+
+  SRP_LOG_DBG_MSG("hicn route nhops add received successfully");
+  // allocate memory msg and resp
+  vapi_msg_hicn_api_route_nhops_add *msg;
+  vapi_msg_hicn_api_route_nhops_add_reply *resp;
+
+  msg = vapi_alloc_hicn_api_route_nhops_add(g_vapi_ctx_instance);
+    SRP_LOG_DBG("msg id:%d",msg->header._vl_msg_id);
+  vapi_msg_hicn_api_route_nhops_add_hton(msg);
+
+
+
+  if(strcmp(input[0].data.string_val,"-1")){
+
+    struct sockaddr_in sa;
+    // store this IP address in sa:
+    inet_pton(AF_INET,  input[0].data.string_val, &(sa.sin_addr));
+    unsigned char * temp = (unsigned char *) &sa.sin_addr.s_addr;
+    memcpy(&msg->payload.prefix[0],temp,4);
+
+
+  }else if(strcmp(input[1].data.string_val,"-1")){
+
+    void *dst = malloc(sizeof(struct in6_addr));
+    inet_pton(AF_INET6, input[1].data.string_val, dst);
+    unsigned char * temp = (unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+    memcpy(&msg->payload.prefix[0],temp,8);
+    memcpy(&msg->payload.prefix[1],temp+8,8);
+
+  }else{
+      SRP_LOG_DBG_MSG("Invalid local IP address");
+      return SR_ERR_OPERATION_FAILED;
+  }
+
+
+
+
+
+  msg->payload.len = input[2].data.uint8_val;
+  msg->payload.face_ids[0] = input[3].data.uint32_val;
+  msg->payload.face_ids[1] = input[4].data.uint32_val;
+  msg->payload.face_ids[2] = input[5].data.uint32_val;
+  msg->payload.face_ids[3] = input[6].data.uint32_val;
+  msg->payload.face_ids[4] = input[7].data.uint32_val;
+  msg->payload.face_ids[5] = input[8].data.uint32_val;
+  msg->payload.face_ids[6] = input[9].data.uint32_val;
+  msg->payload.n_faces = input[10].data.uint8_val;
+
+  if (VAPI_OK != vapi_send(g_vapi_ctx_instance, msg)){
+    SRP_LOG_DBG_MSG("Sending msg to VPP failed");
+    return SR_ERR_OPERATION_FAILED;
+  }
+
+  HICN_VPP_VAPI_RECV;
+
+  vapi_msg_hicn_api_route_nhops_add_reply_ntoh(resp);
+
+  if(!resp->payload.retval){
+      SRP_LOG_DBG_MSG("Successfully Done");
+      return SR_ERR_OK;
+  }
+
+  SRP_LOG_DBG_MSG("Operation Failed");
+  return SR_ERR_OPERATION_FAILED;
+}
+
+/**
+ * @brief API to del hicn route in vpp.
+ */
+static int hicn_route_del_cb(const char *xpath, const sr_val_t *input,
+                             const size_t input_cnt, sr_val_t **output,
+                             size_t *output_cnt, void *private_ctx) {
+
+  SRP_LOG_DBG_MSG("hicn route del received successfully");
+  // allocate memory msg and resp
+  vapi_msg_hicn_api_route_del *msg;
+  vapi_msg_hicn_api_route_del_reply *resp;
+
+  msg = vapi_alloc_hicn_api_route_del(g_vapi_ctx_instance);
+
+  if(strcmp(input[0].data.string_val,"-1")){
+
+    struct sockaddr_in sa;
+    // store this IP address in sa:
+    inet_pton(AF_INET,  input[0].data.string_val, &(sa.sin_addr));
+    unsigned char * temp = (unsigned char *) &sa.sin_addr.s_addr;
+    memcpy(&msg->payload.prefix[0],temp,4);
+
+
+  }else if(strcmp(input[1].data.string_val,"-1")){
+
+    void *dst = malloc(sizeof(struct in6_addr));
+    inet_pton(AF_INET6, input[1].data.string_val, dst);
+    unsigned char * temp = (unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+    memcpy(&msg->payload.prefix[0],temp,8);
+    memcpy(&msg->payload.prefix[1],temp+8,8);
+
+  }else{
+      SRP_LOG_DBG_MSG("Invalid local IP address");
+      return SR_ERR_OPERATION_FAILED;
+  }
+
+
+  msg->payload.len = input[2].data.uint8_val;
+
+  vapi_msg_hicn_api_route_del_hton(msg);
+
+  if (VAPI_OK != vapi_send(g_vapi_ctx_instance, msg)) {
+    SRP_LOG_DBG_MSG("Sending msg to VPP failed");
+    return SR_ERR_OPERATION_FAILED;
+  }
+
+  HICN_VPP_VAPI_RECV;
+
+  vapi_msg_hicn_api_route_del_reply_ntoh(resp);
+
+  if(!resp->payload.retval){
+      SRP_LOG_DBG_MSG("Successfully Done");
+      return SR_ERR_OK;
+  }
+
+  SRP_LOG_DBG_MSG("Operation Failed");
+  return SR_ERR_OPERATION_FAILED;
+}
+
+/**
+ * @brief API to get face ip params in hicn in vpp.
+ */
+static int hicn_face_ip_params_get_cb(const char *xpath, const sr_val_t *input,
+                                      const size_t input_cnt, sr_val_t **output,
+                                      size_t *output_cnt, void *private_ctx) {
+
+  SRP_LOG_DBG_MSG("hicn face ip params get received successfully");
+  // allocate memory msg and resp
+  vapi_msg_hicn_api_face_ip_params_get *msg;
+  vapi_msg_hicn_api_face_ip_params_get_reply *resp;
+
+  msg = vapi_alloc_hicn_api_face_ip_params_get(g_vapi_ctx_instance);
+   SRP_LOG_DBG("msg id:%d",msg->header._vl_msg_id);
+
+  msg->payload.faceid = input[0].data.uint16_val;
+
+  vapi_msg_hicn_api_face_ip_params_get_hton(msg);
+
+  if (VAPI_OK != vapi_send(g_vapi_ctx_instance, msg)) {
+    SRP_LOG_DBG_MSG("Sending msg to VPP failed");
+    return SR_ERR_OPERATION_FAILED;
+  }
+
+  HICN_VPP_VAPI_RECV;
+
+  vapi_msg_hicn_api_face_ip_params_get_reply_ntoh(resp);
+
+  if(!resp->payload.retval){
+      SRP_LOG_DBG_MSG("Successfully Done");
+      return SR_ERR_OK;
+  }
+
+
+  SRP_LOG_DBG_MSG("Operation Failed");
+  return SR_ERR_OPERATION_FAILED;
+}
+
+/**
+ * @brief API to get face ip params in hicn in vpp.
+ */
+static int hicn_punting_add_cb(const char *xpath, const sr_val_t *input,
+                               const size_t input_cnt, sr_val_t **output,
+                               size_t *output_cnt, void *private_ctx) {
+
+  SRP_LOG_DBG_MSG("hicn punting add received successfully");
+  // allocate memory msg and resp
+  vapi_msg_hicn_api_punting_add *msg;
+  vapi_msg_hicn_api_punting_add_reply *resp;
+
+  msg = vapi_alloc_hicn_api_punting_add(g_vapi_ctx_instance);
+   SRP_LOG_DBG("msg id:%d",msg->header._vl_msg_id);
+
+
+  if(strcmp(input[0].data.string_val,"-1")){
+
+    struct sockaddr_in sa;
+    // store this IP address in sa:
+    inet_pton(AF_INET,  input[0].data.string_val, &(sa.sin_addr));
+    unsigned char * temp =  (unsigned char *) &sa.sin_addr.s_addr;
+    memcpy(&msg->payload.prefix[0],temp,4);
+
+
+  }else if(strcmp(input[1].data.string_val,"-1")){
+
+    void *dst = malloc(sizeof(struct in6_addr));
+    inet_pton(AF_INET6, input[1].data.string_val, dst);
+    unsigned char * temp =(unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+    memcpy(&msg->payload.prefix[0],temp,8);
+    memcpy(&msg->payload.prefix[1],temp+8,8);
+
+  }else{
+      SRP_LOG_DBG_MSG("Invalid local IP address");
+      return SR_ERR_OPERATION_FAILED;
+  }
+
+  msg->payload.len = input[2].data.uint8_val;
+  msg->payload.swif = input[3].data.uint32_val;
+
+
+  vapi_msg_hicn_api_punting_add_hton(msg);
+
+
+  if (VAPI_OK != vapi_send(g_vapi_ctx_instance, msg)) {
+    SRP_LOG_DBG_MSG("Sending msg to VPP failed");
+    return SR_ERR_OPERATION_FAILED;
+  }
+
+  HICN_VPP_VAPI_RECV;
+
+  vapi_msg_hicn_api_punting_add_reply_ntoh(resp);
+
+  if(!resp->payload.retval){
+        SRP_LOG_DBG_MSG("Successfully Done");
+        return SR_ERR_OK;
+  }
+
+  SRP_LOG_DBG_MSG("Operation Failed");
+  return SR_ERR_OPERATION_FAILED;
+}
+
+/**
+ * @brief API to del hicn route nhops in vpp.
+ */
+static int hicn_route_nhops_del_cb(const char *xpath, const sr_val_t *input,
+                                   const size_t input_cnt, sr_val_t **output,
+                                   size_t *output_cnt, void *private_ctx) {
+
+  SRP_LOG_DBG_MSG("hicn route nhop del received successfully");
+  // allocate memory msg and resp
+  vapi_msg_hicn_api_route_nhop_del *msg;
+  vapi_msg_hicn_api_route_nhop_del_reply *resp;
+
+  msg = vapi_alloc_hicn_api_route_nhop_del(g_vapi_ctx_instance);
+  vapi_msg_hicn_api_route_nhop_del_hton(msg);
+   SRP_LOG_DBG("msg id:%d",msg->header._vl_msg_id);
+
+
+  if(strcmp(input[0].data.string_val,"-1")){
+
+    struct sockaddr_in sa;
+    // store this IP address in sa:
+    inet_pton(AF_INET,  input[0].data.string_val, &(sa.sin_addr));
+    unsigned char * temp = (unsigned char *) &sa.sin_addr.s_addr;
+    memcpy(&msg->payload.prefix[0],temp,4);
+
+
+  }else if(strcmp(input[1].data.string_val,"-1")){
+
+    void *dst = malloc(sizeof(struct in6_addr));
+    inet_pton(AF_INET6, input[1].data.string_val, dst);
+    unsigned char * temp = (unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+    memcpy(&msg->payload.prefix[0],temp,8);
+    memcpy(&msg->payload.prefix[1],temp+8,8);
+
+  }else{
+      SRP_LOG_DBG_MSG("Invalid local IP address");
+      return SR_ERR_OPERATION_FAILED;
+  }
+
+
+  msg->payload.len = input[2].data.uint8_val;
+  msg->payload.faceid = input[3].data.uint16_val;
+
+  if (VAPI_OK != vapi_send(g_vapi_ctx_instance, msg)) {
+    SRP_LOG_DBG_MSG("Sending msg to VPP failed");
+    return SR_ERR_OPERATION_FAILED;
+  }
+
+  HICN_VPP_VAPI_RECV;
+
+  vapi_msg_hicn_api_route_nhop_del_reply_ntoh(resp);
+  if(!resp->payload.retval){
+        SRP_LOG_DBG_MSG("Successfully Done");
+        return SR_ERR_OK;
+  }
+
+
+  SRP_LOG_DBG_MSG("Operation Failed");
+  return SR_ERR_OPERATION_FAILED;
+}
+
+/**
+ * @brief API to del hicn punting in vpp.
+ */
+static int hicn_punting_del_cb(const char *xpath, const sr_val_t *input,
+                               const size_t input_cnt, sr_val_t **output,
+                               size_t *output_cnt, void *private_ctx) {
+
+  SRP_LOG_DBG_MSG("hicn punting del received successfully");
+  // allocate memory msg and resp
+  vapi_msg_hicn_api_punting_del *msg;
+  vapi_msg_hicn_api_punting_del_reply *resp;
+
+  msg = vapi_alloc_hicn_api_punting_del(g_vapi_ctx_instance);
+   SRP_LOG_DBG("msg id:%d",msg->header._vl_msg_id);
+
+
+  if(strcmp(input[0].data.string_val,"-1")){
+
+    struct sockaddr_in sa;
+    // store this IP address in sa:
+    inet_pton(AF_INET,  input[0].data.string_val, &(sa.sin_addr));
+    unsigned char * temp = (unsigned char *) &sa.sin_addr.s_addr;
+    memcpy(&msg->payload.prefix[0],temp,4);
+
+
+  }else if(strcmp(input[1].data.string_val,"-1")){
+
+    void *dst = malloc(sizeof(struct in6_addr));
+    inet_pton(AF_INET6, input[1].data.string_val, dst);
+    unsigned char * temp = (unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+    memcpy(&msg->payload.prefix[0],temp,8);
+    memcpy(&msg->payload.prefix[1],temp+8,8);
+
+  }else{
+      SRP_LOG_DBG_MSG("Invalid local IP address");
+      return SR_ERR_OPERATION_FAILED;
+  }
+
+
+
+
+
+
+
+  msg->payload.len = input[2].data.uint8_val;
+  msg->payload.swif = input[3].data.uint32_val;
+
+  vapi_msg_hicn_api_punting_del_hton(msg);
+
+  if (VAPI_OK != vapi_send(g_vapi_ctx_instance, msg)) {
+    SRP_LOG_DBG_MSG("Sending msg to VPP failed");
+    return SR_ERR_OPERATION_FAILED;
+  }
+
+  HICN_VPP_VAPI_RECV;
+
+  vapi_msg_hicn_api_punting_del_reply_ntoh(resp);
+
+  if(!resp->payload.retval){
+      SRP_LOG_DBG_MSG("Successfully Done");
+      return SR_ERR_OK;
+  }
+
+
+  SRP_LOG_DBG_MSG("Operation Failed");
+  return SR_ERR_OPERATION_FAILED;
+}
+
+/**
+ * @brief API to del hicn face ip in vpp.
+ */
+static int hicn_face_ip_del_cb(const char *xpath, const sr_val_t *input,
+                               const size_t input_cnt, sr_val_t **output,
+                               size_t *output_cnt, void *private_ctx) {
+
+  SRP_LOG_DBG_MSG("hicn face ip del received successfully");
+  // allocate memory msg and resp
+  vapi_msg_hicn_api_face_ip_del *msg;
+  vapi_msg_hicn_api_face_ip_del_reply *resp;
+
+  msg = vapi_alloc_hicn_api_face_ip_del(g_vapi_ctx_instance);
+   SRP_LOG_DBG("msg id:%d",msg->header._vl_msg_id);
+  msg->payload.faceid = input[0].data.uint16_val;
+
+  vapi_msg_hicn_api_face_ip_del_hton(msg);
+
+  if (VAPI_OK != vapi_send(g_vapi_ctx_instance, msg)) {
+    SRP_LOG_DBG_MSG("Sending msg to VPP failed");
+    return SR_ERR_OPERATION_FAILED;
+  }
+
+  HICN_VPP_VAPI_RECV;
+
+  vapi_msg_hicn_api_face_ip_del_reply_ntoh(resp);
+
+  if(!resp->payload.retval){
+      SRP_LOG_DBG_MSG("Successfully Done");
+      return SR_ERR_OK;
+  }
+
+  SRP_LOG_DBG_MSG("Operation Failed");
+  return SR_ERR_OPERATION_FAILED;
+}
+
+/**
+ * @brief API to del hicn face ip in vpp.
+ */
+static int hicn_face_ip_add_cb(const char *xpath, const sr_val_t *input,
+                               const size_t input_cnt, sr_val_t **output,
+                               size_t *output_cnt, void *private_ctx) {
+
+  SRP_LOG_DBG_MSG("hicn face ip add received successfully");
+
+  // allocate memory msg and resp
+  vapi_msg_hicn_api_face_ip_add *msg;
+  vapi_msg_hicn_api_face_ip_add_reply *resp;
+
+  msg = vapi_alloc_hicn_api_face_ip_add(g_vapi_ctx_instance);
+  SRP_LOG_DBG("msg id:%d",msg->header._vl_msg_id);
+  if(strcmp(input[0].data.string_val,"-1")){
+
+  struct sockaddr_in sa;
+  // store this IP address in sa:
+  inet_pton(AF_INET,  input[0].data.string_val, &(sa.sin_addr));
+  unsigned char * temp = (unsigned char *) &sa.sin_addr.s_addr;
+  memcpy(&msg->payload.local_addr[0],temp,4);
+
+  }else if(strcmp(input[1].data.string_val,"-1")){
+
+    void *dst = malloc(sizeof(struct in6_addr));
+    inet_pton(AF_INET6, input[1].data.string_val, dst);
+    unsigned char * temp = (unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+    memcpy(&msg->payload.local_addr[0],temp,8);
+    memcpy(&msg->payload.local_addr[1],temp+8,8);
+
+  }else{
+      SRP_LOG_DBG_MSG("Invalid local IP address");
+      return SR_ERR_OPERATION_FAILED;
+  }
+
+  if(strcmp(input[2].data.string_val,"-1")){
+
+  struct sockaddr_in sa;
+  // store this IP address in sa:
+  inet_pton(AF_INET,  input[2].data.string_val, &(sa.sin_addr));
+  unsigned char * temp = (unsigned char *)&sa.sin_addr.s_addr;
+  memcpy(&msg->payload.remote_addr[0],temp,4);
+
+
+  }else if(strcmp(input[3].data.string_val,"-1")){
+
+    void *dst = malloc(sizeof(struct in6_addr));
+    inet_pton(AF_INET6, input[3].data.string_val, dst);
+    unsigned char * temp =(unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+    memcpy(&msg->payload.remote_addr[0],temp,8);
+    memcpy(&msg->payload.remote_addr[1],temp+8,8);
+
+  }else{
+      SRP_LOG_DBG_MSG("Invalid local IP address");
+      return SR_ERR_OPERATION_FAILED;
+  }
+
+  msg->payload.swif = input[4].data.uint32_val;  // This is the idx number of interface
+
+  vapi_msg_hicn_api_face_ip_add_hton(msg);
+
+  if (VAPI_OK != vapi_send(g_vapi_ctx_instance, msg)) {
+    SRP_LOG_DBG_MSG("Sending msg to VPP failed");
+    return SR_ERR_OPERATION_FAILED;
+  }
+
+  HICN_VPP_VAPI_RECV;
+
+  vapi_msg_hicn_api_face_ip_add_reply_ntoh(resp);
+
+  if(!resp->payload.retval){
+      SRP_LOG_DBG("Successfully Done return faceid: %d",resp->payload.faceid);
+       return SR_ERR_OK;
+  }
+
+  SRP_LOG_DBG_MSG("Operation Failed");
+  return SR_ERR_OPERATION_FAILED;
+}
+
+/**
+ * @brief Helper function for subscribing all hicn APIs.
+ */
+int hicn_subscribe_events(sr_session_ctx_t *session,
+                          sr_subscription_ctx_t **subscription) {
+    int rc = SR_ERR_OK;
+    SRP_LOG_DBG_MSG("Subscriging hicn.");
+
+
+    //Initializing the locks
+    for (int i=0; i<NLOCKS; i++)
+      Ticket_init(i,LOCK_INIT);
+
+    //Initializing the buffer
+    rc=init_buffer();
+    if(rc!= SR_ERR_OK){
+        SRP_LOG_DBG_MSG("Problem in initializing the buffers\n"); goto error;
+    }
+
+
+
+    // node state subscriptions
+
+    rc = sr_rpc_subscribe(session, "/hicn:node-params-get", hicn_node_params_get_cb,
+    session, SR_SUBSCR_CTX_REUSE, subscription); if (rc != SR_ERR_OK) {
+      SRP_LOG_DBG_MSG("Problem in subscription stat-get\n");
+      goto error;
+    }
+
+
+    // node state subscriptions
+
+    rc = sr_rpc_subscribe(session, "/hicn:node-stat-get", hicn_node_stat_get_cb,
+    session, SR_SUBSCR_CTX_REUSE, subscription); if (rc != SR_ERR_OK) {
+      SRP_LOG_DBG_MSG("Problem in subscription stat-get\n");
+      goto error;
+    }
+
+    // strategies subscriptions
+
+    rc = sr_rpc_subscribe(session, "/hicn:strategy-get", hicn_strategy_get_cb,
+    session, SR_SUBSCR_CTX_REUSE, subscription); if (rc != SR_ERR_OK) {
+      SRP_LOG_DBG_MSG("Problem in subscription strategy-get\n");
+      goto error;
+    }
+
+    rc = sr_rpc_subscribe(session, "/hicn:strategies-get",
+    hicn_strategies_get_cb, session, SR_SUBSCR_CTX_REUSE, subscription); if (rc
+    != SR_ERR_OK) { SRP_LOG_DBG_MSG("Problem in subscription strategies-get\n"); goto error;
+    }
+
+    // route subscriptions
+
+    rc = sr_rpc_subscribe(session, "/hicn:route-get", hicn_route_get_cb,
+    session, SR_SUBSCR_CTX_REUSE, subscription); if (rc != SR_ERR_OK) {
+      SRP_LOG_DBG_MSG("Problem in subscription route-get\n");
+      goto error;
+    }
+
+    rc = sr_rpc_subscribe(session, "/hicn:route-del", hicn_route_del_cb,
+    session, SR_SUBSCR_CTX_REUSE, subscription); if (rc != SR_ERR_OK) {
+      SRP_LOG_DBG_MSG("Problem in subscription route-del\n");
+      goto error;
+    }
+
+
+    // route nhops subscriptions
+
+    rc = sr_rpc_subscribe(session, "/hicn:route-nhops-add",
+    hicn_route_nhops_add_cb, session, SR_SUBSCR_CTX_REUSE, subscription); if (rc
+    != SR_ERR_OK) { SRP_LOG_DBG_MSG("Problem in subscription route-get\n"); goto error;
+    }
+
+    rc = sr_rpc_subscribe(session, "/hicn:route-nhops-del",
+    hicn_route_nhops_del_cb, session, SR_SUBSCR_CTX_REUSE, subscription); if (rc
+    != SR_ERR_OK) { SRP_LOG_DBG_MSG("Problem in subscription route-nhops-del\n"); goto
+    error;
+    }
+
+
+    // face ip subscriptions
+
+    rc = sr_rpc_subscribe(session, "/hicn:face-ip-params-get",
+    hicn_face_ip_params_get_cb, session, SR_SUBSCR_CTX_REUSE, subscription); if
+    (rc != SR_ERR_OK) { SRP_LOG_DBG_MSG("Problem in subscription face-ip-params-get\n");
+      goto error;
+    }
+
+
+    rc = sr_rpc_subscribe(session, "/hicn:face-ip-add", hicn_face_ip_add_cb,
+    session, SR_SUBSCR_CTX_REUSE, subscription); if (rc != SR_ERR_OK) {
+      SRP_LOG_DBG_MSG("Problem in subscription face-ip-add\n");
+      goto error;
+    }
+
+    rc = sr_rpc_subscribe(session, "/hicn:face-ip-del", hicn_face_ip_del_cb,
+    session, SR_SUBSCR_CTX_REUSE, subscription); if (rc != SR_ERR_OK) {
+      SRP_LOG_DBG_MSG("Problem in subscription face-ip-del\n");
+      goto error;
+    }
+
+    // punting subscriptions
+
+    rc = sr_rpc_subscribe(session, "/hicn:punting-add", hicn_punting_add_cb,
+    session, SR_SUBSCR_CTX_REUSE, subscription); if (rc != SR_ERR_OK) {
+      SRP_LOG_DBG_MSG("Problem in subscription punting-add\n");
+      goto error;
+    }
+
+  rc = sr_rpc_subscribe(session, "/hicn:punting-del", hicn_punting_del_cb,
+                        session, SR_SUBSCR_CTX_REUSE, subscription);
+  if (rc != SR_ERR_OK) {
+    SRP_LOG_DBG_MSG("Problem in subscription punting-del\n");
+    goto error;
+  }
+
+  rc = sr_subtree_change_subscribe(
+      session, "/hicn:hicn-conf", hicn_node_params_set_cb, g_vapi_ctx_instance,
+      100, SR_SUBSCR_CTX_REUSE | SR_SUBSCR_EV_ENABLED, subscription);
+  if (SR_ERR_OK != rc) {
+    SRP_LOG_DBG_MSG("Problem in subscription /hicn:hicn-conf\n");
+    goto error;
+  }
+
+  // subscribe as hicn state data provider
+  rc = sr_dp_get_items_subscribe(session, "/hicn:hicn-state/states",
+                                 hicn_state_states_cb, NULL, SR_SUBSCR_CTX_REUSE,
+                                 subscription);
+  if (rc != SR_ERR_OK) {
+    SRP_LOG_DBG_MSG("Problem in subscription /hicn:hicn-state/states\n");
+    goto error;
+  }
+
+
+
+  rc = sr_dp_get_items_subscribe(session, "/hicn:hicn-state/strategy",
+                                 hicn_state_strategy_cb, NULL, SR_SUBSCR_CTX_REUSE,
+                                 subscription);
+  if (rc != SR_ERR_OK) {
+    SRP_LOG_DBG_MSG("Problem in subscription /hicn:hicn-state/strategy\n");
+    goto error;
+  }
+
+
+
+  rc = sr_dp_get_items_subscribe(session, "/hicn:hicn-state/strategies",
+                                 hicn_state_strategies_cb, NULL, SR_SUBSCR_CTX_REUSE,
+                                 subscription);
+  if (rc != SR_ERR_OK) {
+    SRP_LOG_DBG_MSG("Problem in subscription /hicn:hicn-state/strategies\n");
+    goto error;
+  }
+
+
+  rc = sr_dp_get_items_subscribe(session, "/hicn:hicn-state/route",
+                                 hicn_state_route_cb, NULL, SR_SUBSCR_CTX_REUSE,
+                                 subscription);
+  if (rc != SR_ERR_OK) {
+    SRP_LOG_DBG_MSG("Problem in subscription /hicn:hicn-state/route\n");
+    goto error;
+  }
+
+
+  rc = sr_dp_get_items_subscribe(session, "/hicn:hicn-state/face-ip-params",
+                                 hicn_state_face_ip_params_cb, NULL, SR_SUBSCR_CTX_REUSE,
+                                 subscription);
+  if (rc != SR_ERR_OK) {
+    SRP_LOG_DBG_MSG("Problem in subscription /hicn:hicn-state/face-ip-params\n");
+    goto error;
+  }
+
+
+  SRP_LOG_INF_MSG("hicn plugin initialized successfully.");
+  return SR_ERR_OK;
+
+error:
+  SRP_LOG_ERR_MSG("Error by initialization of the hicn plugin.");
+  sr_plugin_cleanup_cb(session, &g_vapi_ctx_instance);
+  return rc;
+}
\ No newline at end of file
diff --git a/utils/sysrepo-plugins/hicn-plugin/plugin/model/hicn_model.h b/utils/sysrepo-plugins/hicn-plugin/plugin/model/hicn_model.h
new file mode 100644
index 000000000..1f5acabc5
--- /dev/null
+++ b/utils/sysrepo-plugins/hicn-plugin/plugin/model/hicn_model.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 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 __IETF_HICN_H__
+#define __IETF_HICN_H__
+
+#include "../hicn_vpp_comm.h"
+
+
+#define MEM_ALIGN 4096
+
+// Number of locks is equal to number of nodes in hicn-state
+// It is a coarse grain approach later can be changed to fine grained
+// better to initialize the lock by 0
+#define NLOCKS 5
+#define LOCK_INIT 0
+
+
+enum locks_name {lstate, lstrategy, lstrategies, lroute, lface_ip_params};
+
+#define NSTATE_LEAVES 15
+#define NSTRATEGY_LEAVES 1
+#define NSTRATEGIES_LEAVES 2
+#define NROUTE_LEAVES 2
+#define NFACE_IP_PARAMS_LEAVES 3
+
+
+typedef struct __attribute__ ((__packed__)) {
+
+  uint64_t pkts_processed;
+  uint64_t pkts_interest_count;
+  uint64_t pkts_data_count;
+  uint64_t pkts_from_cache_count;
+  uint64_t pkts_no_pit_count;
+  uint64_t pit_expired_count;
+  uint64_t cs_expired_count;
+  uint64_t cs_lru_count;
+  uint64_t pkts_drop_no_buf;
+  uint64_t interests_aggregated;
+  uint64_t interests_retx;
+  uint64_t interests_hash_collision;
+  uint64_t pit_entries_count;
+  uint64_t cs_entries_count;
+  uint64_t cs_entries_ntw_count;
+  int32_t retval;
+
+} hicn_state_t;
+
+typedef struct __attribute__ ((__packed__)) {
+  uint8_t description[200];
+  int32_t retval;
+} hicn_strategy_t;
+
+
+typedef struct __attribute__ ((__packed__)) {
+
+  uint8_t n_strategies;
+  uint32_t strategy_id[256];
+  int32_t retval;
+} hicn_strategies_t;
+
+typedef struct __attribute__ ((__packed__)) {
+  uint16_t faceids[1000];
+  uint32_t strategy_id;
+  int32_t retval;
+} hicn_route_t;
+
+typedef struct __attribute__ ((__packed__)) {
+  uint64_t nh_addr[2];
+  uint32_t swif;
+  uint32_t flags;
+  int32_t retval;
+} hicn_face_ip_params_t;
+
+int hicn_subscribe_events(sr_session_ctx_t *session,
+                          sr_subscription_ctx_t **subscription);
+
+#endif /* __IETF_HICN_H__ */
\ No newline at end of file
diff --git a/utils/sysrepo-plugins/hicn-plugin/plugin/model/tlock.c b/utils/sysrepo-plugins/hicn-plugin/plugin/model/tlock.c
new file mode 100644
index 000000000..d870adf75
--- /dev/null
+++ b/utils/sysrepo-plugins/hicn-plugin/plugin/model/tlock.c
@@ -0,0 +1,21 @@
+#include"tlock.h"
+
+
+void Ticket_init ( int Lock_Number , long int init ){
+
+//__atomic_store( &En[Lock_Number] , &init , __ATOMIC_SEQ_CST );
+//__atomic_store( &De[Lock_Number] , &init , __ATOMIC_SEQ_CST );
+En[Lock_Number]=init;
+De[Lock_Number]=init;
+}
+
+void Ticket_Lock(int Lock_Number ){
+
+ int my_ticket =   __sync_fetch_and_add(&En[Lock_Number] , 1  );
+ while (    my_ticket != De[ Lock_Number ]  ) {};
+
+}
+
+void Ticket_Unlock(int Lock_Number ){
+De[Lock_Number]++;
+}
diff --git a/utils/sysrepo-plugins/hicn-plugin/plugin/model/tlock.h b/utils/sysrepo-plugins/hicn-plugin/plugin/model/tlock.h
new file mode 100644
index 000000000..36698115a
--- /dev/null
+++ b/utils/sysrepo-plugins/hicn-plugin/plugin/model/tlock.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 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 __TLOCK_H__
+#define __TLOCK_H__
+
+
+// limit on the number of locks: it shoud be matched with the  number of hicn-state leaves
+#define MAX_LOCK_SIZE  5
+
+volatile long int  En[MAX_LOCK_SIZE] , De[MAX_LOCK_SIZE] ;   // For Ticket Algorithm
+
+
+void Ticket_init ( int Lock_Number , long int init );
+void Ticket_Lock(int Lock_Number );
+void Ticket_Unlock(int Lock_Number );
+
+#endif /* __IETF_HICN_H__ */
\ No newline at end of file