[HICN-279] Added libmemif packaging.

Change-Id: Ie8662059163b7a01211bb18fb8f6b77bbbc07279
Signed-off-by: Mauro Sardara <msardara@cisco.com>

10 files changed, 2615 insertions, 0 deletions

diff --git a/ctrl/sysrepo-plugins/hicn-plugin/plugin/hicn_plugin.c b/ctrl/sysrepo-plugins/hicn-plugin/plugin/hicn_plugin.c
new file mode 100644
index 000000000..262e98553
--- /dev/null
+++ b/ctrl/sysrepo-plugins/hicn-plugin/plugin/hicn_plugin.c
@@ -0,0 +1,123 @@
+/*
+ * 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 <inttypes.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "hicn_plugin.h"
+#include "model/hicn_model.h"
+#include "ietf/ietf_interface.h"
+
+
+sr_subscription_ctx_t *subscription = NULL;
+volatile int exit_application = 0;
+
+int sr_plugin_init_cb(sr_session_ctx_t *session, void **private_ctx) {
+  HICN_INVOKE_BEGIN;
+  sr_subscription_ctx_t *subscription = NULL;
+  int rc = SR_ERR_OK;
+  rc = hicn_connect_vpp();
+  if (SR_ERR_OK != rc) {
+    HICN_LOG_ERR("vpp connect error , with return %d.", rc);
+    return SR_ERR_INTERNAL;
+  }
+
+  // HICN subscribe
+  hicn_subscribe_events(session, &subscription);
+
+  // IETF subscribe
+  ietf_subscribe_events(session, &subscription);
+
+
+  /* set subscription as our private context */
+  *private_ctx = subscription;
+  HICN_INVOKE_END;
+  return SR_ERR_OK;
+}
+
+void sr_plugin_cleanup_cb(sr_session_ctx_t *session, void *private_ctx) {
+  HICN_INVOKE_BEGIN;
+
+  /* subscription was set as our private context */
+  sr_unsubscribe(session, private_ctx);
+  HICN_LOG_DBG_MSG("hicn pligin unload plugin ok.");
+  hicn_disconnect_vpp();
+  HICN_LOG_DBG_MSG("hicn plugin disconnect vpp ok.");
+  HICN_INVOKE_END;
+}
+
+static void sigint_handler(int signum) { exit_application = 1; }
+int subscribe_all_module_events(sr_session_ctx_t *session) {
+  sr_plugin_init_cb(session, (void **)&subscription);
+  return 0;
+}
+
+int main(int argc, char **argv) {
+  sr_conn_ctx_t *connection = NULL;
+  sr_session_ctx_t *session = NULL;
+  int rc = SR_ERR_OK;
+  /* connect to vpp */
+  rc = hicn_connect_vpp();
+  if (-1 == rc) {
+    fprintf(stderr, "vpp connect error");
+    return -1;
+  }
+
+  /* connect to sysrepo */
+  rc = sr_connect("cpe_application", SR_CONN_DEFAULT, &connection);
+  if (SR_ERR_OK != rc) {
+    fprintf(stderr, "Error by sr_connect: %s\n", sr_strerror(rc));
+    goto cleanup;
+  }
+
+  /* start session */
+  rc = sr_session_start(connection, SR_DS_STARTUP, SR_SESS_DEFAULT, &session);
+  if (SR_ERR_OK != rc) {
+    fprintf(stderr, "Error by sr_session_start: %s\n", sr_strerror(rc));
+    goto cleanup;
+  }
+
+  /* subscribe all module events */
+  rc = subscribe_all_module_events(session);
+  if (SR_ERR_OK != rc) {
+    fprintf(stderr, "Error by subscribe module events: %s\n", sr_strerror(rc));
+    goto cleanup;
+  }
+
+  /* loop until ctrl-c is pressed / SIGINT is received */
+  signal(SIGINT, sigint_handler);
+  signal(SIGPIPE, SIG_IGN);
+
+  while (!exit_application) {
+    sleep(2);
+  }
+
+  printf("Application exit requested, exiting.\n");
+
+cleanup:
+  if (NULL != subscription) {
+    sr_unsubscribe(session, subscription);
+  }
+  if (NULL != session) {
+    sr_session_stop(session);
+  }
+  if (NULL != connection) {
+    sr_disconnect(connection);
+  }
+  hicn_disconnect_vpp();
+  return rc;
+}
\ No newline at end of file
diff --git a/ctrl/sysrepo-plugins/hicn-plugin/plugin/hicn_plugin.h b/ctrl/sysrepo-plugins/hicn-plugin/plugin/hicn_plugin.h
new file mode 100644
index 000000000..4e48c8c29
--- /dev/null
+++ b/ctrl/sysrepo-plugins/hicn-plugin/plugin/hicn_plugin.h
@@ -0,0 +1,25 @@
+/*
+ * 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 __HICN_PLUGIN_H__
+#define __HICN_PLUGIN_H__
+
+#include "hicn_vpp_comm.h"
+
+// functions that sysrepo-plugin need
+int sr_plugin_init_cb(sr_session_ctx_t *session, void **private_ctx);
+void sr_plugin_cleanup_cb(sr_session_ctx_t *session, void *private_ctx);
+
+#endif  //__HICN_PLUGIN_H__
\ No newline at end of file
diff --git a/ctrl/sysrepo-plugins/hicn-plugin/plugin/hicn_vpp_comm.c b/ctrl/sysrepo-plugins/hicn-plugin/plugin/hicn_vpp_comm.c
new file mode 100644
index 000000000..f044c5b1b
--- /dev/null
+++ b/ctrl/sysrepo-plugins/hicn-plugin/plugin/hicn_vpp_comm.c
@@ -0,0 +1,57 @@
+/*
+ * 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 "hicn_vpp_comm.h"
+#include <vapi/vapi.h>
+
+
+
+
+#define APP_NAME "hicn_plugin"
+#define MAX_OUTSTANDING_REQUESTS 4
+#define RESPONSE_QUEUE_SIZE 2
+vapi_ctx_t g_vapi_ctx_instance=NULL;
+
+// Use VAPI macros to define symbols
+
+
+
+int hicn_connect_vpp() {
+  HICN_INVOKE_BEGIN;
+  if (g_vapi_ctx_instance == NULL) {
+    vapi_error_e rv = vapi_ctx_alloc(&g_vapi_ctx_instance);
+    rv = vapi_connect(g_vapi_ctx_instance, APP_NAME, NULL,
+                      MAX_OUTSTANDING_REQUESTS, RESPONSE_QUEUE_SIZE,
+                      VAPI_MODE_BLOCKING, true);
+    if (rv != VAPI_OK) {
+      HICN_LOG_ERR("*connect %s faild,with return %d", APP_NAME, rv);
+      vapi_ctx_free(g_vapi_ctx_instance);
+      return -1;
+    }
+    HICN_LOG_DBG("*connected %s ok", APP_NAME);
+  } else {
+    HICN_LOG_DBG("connection %s keeping", APP_NAME);
+  }
+  HICN_INVOKE_END;
+  return 0;
+}
+
+int hicn_disconnect_vpp() {
+  if (NULL != g_vapi_ctx_instance) {
+    vapi_disconnect(g_vapi_ctx_instance);
+    vapi_ctx_free(g_vapi_ctx_instance);
+    g_vapi_ctx_instance = NULL;
+  }
+  return 0;
+}
\ No newline at end of file
diff --git a/ctrl/sysrepo-plugins/hicn-plugin/plugin/hicn_vpp_comm.h b/ctrl/sysrepo-plugins/hicn-plugin/plugin/hicn_vpp_comm.h
new file mode 100644
index 000000000..fd71dbaf2
--- /dev/null
+++ b/ctrl/sysrepo-plugins/hicn-plugin/plugin/hicn_vpp_comm.h
@@ -0,0 +1,128 @@
+/*
+ * 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 __HICN_VPP_COMMM_H__
+#define __HICN_VPP_COMMM_H__
+#include <sysrepo.h>
+#include <sysrepo/plugins.h>  //for HICN_LOG_DBG
+#include <sysrepo/values.h>
+#include <vapi/vapi.h>
+
+#ifndef HICN_THIS_FUNC
+#ifdef __FUNCTION__
+#define HICN_THIS_FUNC __FUNCTION__
+#else
+#define HICN_THIS_FUNC __func__
+#endif
+#endif
+
+#ifndef _NOLOG
+#define HICN_LOG_DBG SRP_LOG_DBG
+#define HICN_LOG_ERR SRP_LOG_ERR
+#define HICN_LOG_DBG_MSG SRP_LOG_DBG_MSG
+#define HICN_LOG_ERR_MSG SRP_LOG_ERR_MSG
+#else
+#define HICN_LOG_DBG      // printf
+#define HICN_LOG_DBG      // SRP_LOG_DBG
+#define HICN_LOG_ERR      // SRP_LOG_ERR
+#define HICN_LOG_DBG_MSG  // SRP_LOG_DBG_MSG
+#define HICN_LOG_ERR_MSG  // SRP_LOG_ERR_MSG
+#endif
+
+
+// ctx vpp connect
+extern vapi_ctx_t g_vapi_ctx_instance;
+
+//Here it is the definition
+
+#define VPP_INTFC_NAME_LEN 64
+#define VPP_MAC_ADDRESS_LEN 8
+#define VPP_IP6_ADDRESS_LEN 16
+#define HICN_INVOKE_BEGIN HICN_LOG_DBG("inovke %s bein.", HICN_THIS_FUNC);
+#define HICN_INVOKE_END \
+  HICN_LOG_DBG("inovke %s end,with return OK.", HICN_THIS_FUNC);
+#define HICN_INVOKE_ENDX(...) \
+  HICN_LOG_DBG("inovke %s end,with %s.", HICN_THIS_FUNC, ##__VA_ARGS__)
+
+#define ARG_CHECK(retval, arg)                        \
+  do {                                                \
+    if (NULL == (arg)) {                              \
+      HICN_LOG_ERR_MSG(#arg ":NULL pointer passed."); \
+      return (retval);                                \
+    }                                                 \
+  } while (0)
+
+
+
+#define ARG_CHECK2(retval, arg1, arg2) \
+    ARG_CHECK(retval, arg1); \
+    ARG_CHECK(retval, arg2)
+
+#define ARG_CHECK6(retval, arg1, arg2, arg3, arg4, arg5, arg6) \
+    ARG_CHECK(retval, arg1); \
+    ARG_CHECK(retval, arg2); \
+    ARG_CHECK(retval, arg3); \
+    ARG_CHECK(retval, arg4); \
+    ARG_CHECK(retval, arg5); \
+    ARG_CHECK(retval, arg6)
+
+
+/**
+ * when use tihs must fist DEFINE_VAPI_MSG_IDS_VXLAN_API_JSON
+ */
+#define HICN_VPP_VAPI_RECV                                                   \
+  do {                                                                       \
+    size_t size;                                                             \
+    int recv_vapimsgid = -1;                                                 \
+    vapi_recv(g_vapi_ctx_instance, (void *)&resp, &size, 0, 0);              \
+    recv_vapimsgid = vapi_lookup_vapi_msg_id_t(                              \
+        g_vapi_ctx_instance, ntohs(resp->header._vl_msg_id));                \
+    if (recv_vapimsgid <= vapi_msg_id_get_next_index_reply ||                \
+        recv_vapimsgid >= vapi_get_message_count()) {                        \
+      HICN_LOG_DBG("***recv error msgid[%d] not in [0-%d) ,try again!***\n", \
+                   recv_vapimsgid, vapi_get_message_count());                \
+    } else {                                                                 \
+      HICN_LOG_DBG("recv msgid [%d]\n", recv_vapimsgid);                     \
+      break;                                                                 \
+    }                                                                        \
+  } while (1);
+
+#define HICN_REGISTER_RPC_EVT_HANDLER(rpc_evt_handle)          \
+  do {                                                         \
+    sr_error_t rc = rpc_evt_handle(session, &subscription);    \
+    if (SR_ERR_OK != rc) {                                     \
+      HICN_LOG_ERR("load plugin failed: %s", sr_strerror(rc)); \
+      sr_unsubscribe(session, subscription);                   \
+      HICN_INVOKE_ENDX(sr_strerror(rc));                       \
+      return rc;                                               \
+    }                                                          \
+  } while (0);
+
+
+// define the error list
+typedef enum {
+    HICN_OK = 0,       /* Success */
+    HICN_EINVAL,       /* Invalid value encountered */
+    HICN_EAGAIN,       /* Operation would block */
+    HICN_ENOTSUP,      /* Operation not supported */
+    HICN_ENOMEM,       /* Out of memory */
+    HICN_NOT_FOUND,    /* Required element can not be found */
+} hicn_error_e;
+
+
+int hicn_connect_vpp();
+int hicn_disconnect_vpp();
+
+#endif  //__HICN_VPP_COMMM_H__
\ No newline at end of file
diff --git a/ctrl/sysrepo-plugins/hicn-plugin/plugin/ietf/ietf_interface.c b/ctrl/sysrepo-plugins/hicn-plugin/plugin/ietf/ietf_interface.c
new file mode 100644
index 000000000..f02605895
--- /dev/null
+++ b/ctrl/sysrepo-plugins/hicn-plugin/plugin/ietf/ietf_interface.c
@@ -0,0 +1,597 @@
+/*
+ * Copyright (c) 2016 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 <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <sysrepo.h>
+#include <sysrepo/plugins.h>
+#include <sysrepo/values.h>
+#include <sysrepo/xpath.h>
+#include <vnet/interface.h>
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vapi/interface.api.vapi.h>
+
+#include "ietf_interface.h"
+#include "../hicn_vpp_comm.h"
+
+
+
+DEFINE_VAPI_MSG_IDS_INTERFACE_API_JSON;
+
+typedef struct hicn_interface_
+{
+  u32 sw_if_index;
+  char interface_name[VPP_INTFC_NAME_LEN];
+  u8 l2_address[VPP_MAC_ADDRESS_LEN];
+  u32 l2_address_length;
+  u64 link_speed;
+  u16 link_mtu;
+  u8 admin_up_down;
+  u8 link_up_down;
+} hicnIntfc;
+
+typedef struct _ietf_sw_interface_dump_ctx
+{
+  u8 last_called;
+  int num_ifs;
+  int capacity;
+  hicnIntfc * intfcArray;
+} ietf_sw_interface_dump_ctx;
+
+static i32 ietf_setInterfaceFlags(u32 sw_if_index, u8 admin_up_down);
+static i32 ietf_interface_name2index(const char *name, u32* if_index);
+static i32 ietf_interface_add_del_addr(u32 sw_if_index, u8 is_add, u8 is_ipv6,
+                                       u8 del_all, u8 address_length,
+                                       u8 address[VPP_IP6_ADDRESS_LEN]);
+static int ietf_initSwInterfaceDumpCTX(ietf_sw_interface_dump_ctx * dctx);
+static int ietf_freeSwInterfaceDumpCTX(ietf_sw_interface_dump_ctx * dctx);
+
+/**
+ * @brief Helper function for converting netmask into prefix length.
+ */
+static uint8_t
+netmask_to_prefix(const char *netmask)
+{
+    in_addr_t n = 0;
+    uint8_t i = 0;
+
+    inet_pton(AF_INET, netmask, &n);
+
+    while (n > 0) {
+        n = n >> 1;
+        i++;
+    }
+
+    return i;
+}
+
+/**
+ * @brief Helper function for converting IPv4/IPv6 address string into binary representation.
+ */
+static int
+ip_addr_str_to_binary(const char *ip_address_str, uint8_t *ip_address_bin, bool is_ipv6)
+{
+    struct in6_addr addr6 = { 0, };
+    struct in_addr addr4 = { 0, };
+    int ret = 0;
+
+    if (is_ipv6) {
+        ret = inet_pton(AF_INET6, ip_address_str, &(addr6));
+        if (1 == ret)
+        {
+            memcpy(ip_address_bin, &addr6, sizeof(addr6));
+        }
+    } else {
+        ret = inet_pton(AF_INET, ip_address_str, &(addr4));
+        if (1 == ret)
+        {
+            memcpy(ip_address_bin, &addr4, sizeof(addr4));
+        }
+    }
+
+    return ret;
+}
+
+/**
+ * @brief Enable or disable given interface.
+ */
+static int
+interface_enable_disable(const char *if_name, bool enable)
+{
+    uint32_t if_index = ~0;
+    int rc = 0;
+
+    SRP_LOG_DBG("%s interface '%s'", enable ? "Enabling" : "Disabling", if_name);
+
+    /* get interface index */
+    rc = ietf_interface_name2index(if_name, &if_index);
+    if (0 != rc) {
+        SRP_LOG_ERR("Invalid interface name: %s", if_name);
+        return SR_ERR_INVAL_ARG;
+    }
+
+    /* enable/disable interface */
+    rc = ietf_setInterfaceFlags(if_index, (uint8_t)enable);
+    if (0 != rc) {
+        SRP_LOG_ERR("Error by processing of the sw_interface_set_flags request, rc=%d", rc);
+        return SR_ERR_OPERATION_FAILED;
+    } else {
+        return SR_ERR_OK;
+    }
+}
+
+/**
+ * @brief Callback to be called by any config change of "/ietf-interfaces:interfaces/interface/enabled" leaf.
+ */
+static int
+ietf_interface_enable_disable_cb(sr_session_ctx_t *session, const char *xpath, sr_notif_event_t event, void *private_ctx)
+{
+    char *if_name = NULL;
+    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;
+    }
+    SRP_LOG_DBG("'%s' modified, event=%d", xpath, event);
+
+    /* 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;
+    }
+
+    /* 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)))) {
+
+        SRP_LOG_DBG("A change detected in '%s', op=%d", new_val ? new_val->xpath : old_val->xpath, op);
+        if_name = sr_xpath_key_value(new_val ? new_val->xpath : old_val->xpath, "interface", "name", &xpath_ctx);
+        switch (op) {
+            case SR_OP_CREATED:
+            case SR_OP_MODIFIED:
+                op_rc = interface_enable_disable(if_name, new_val->data.bool_val);
+                break;
+            case SR_OP_DELETED:
+                op_rc = interface_enable_disable(if_name, false /* !enable */);
+                break;
+            default:
+                break;
+        }
+        sr_xpath_recover(&xpath_ctx);
+        if (SR_ERR_INVAL_ARG == op_rc) {
+            sr_set_error(session, "Invalid interface name.", new_val ? new_val->xpath : old_val->xpath);
+        }
+        sr_free_val(old_val);
+        sr_free_val(new_val);
+    }
+    sr_free_change_iter(iter);
+
+    return op_rc;
+}
+
+/**
+ * @brief Add or remove IPv4/IPv6 address to/from an interface.
+ */
+static int
+interface_ipv46_config_add_remove(const char *if_name, uint8_t *addr, uint8_t prefix, bool is_ipv6, bool add)
+{
+    uint32_t if_index = ~0;
+    int rc = 0;
+
+    SRP_LOG_DBG("%s IP config on interface '%s'.", add ? "Adding" : "Removing", if_name);
+
+    /* get interface index */
+    rc = ietf_interface_name2index(if_name, &if_index);
+    if (0 != rc) {
+        SRP_LOG_ERR("Invalid interface name: %s", if_name);
+        return SR_ERR_INVAL_ARG;
+    }
+
+    /* add del addr */
+    rc = ietf_interface_add_del_addr(if_index, (uint8_t)add, (uint8_t)is_ipv6, 0, prefix, addr);
+    if (0 != rc) {
+        SRP_LOG_ERR("Error by processing of the sw_interface_set_flags request, rc=%d", rc);
+        return SR_ERR_OPERATION_FAILED;
+    } else {
+        return SR_ERR_OK;
+    }
+}
+int ietf_initSwInterfaceDumpCTX(ietf_sw_interface_dump_ctx * dctx)
+{
+  if(dctx == NULL)
+    return -1;
+
+  dctx->intfcArray = NULL;
+  dctx->last_called = false;
+  dctx->capacity = 0;
+  dctx->num_ifs = 0;
+  return 0;
+}
+int ietf_freeSwInterfaceDumpCTX(ietf_sw_interface_dump_ctx * dctx)
+{
+  if(dctx == NULL)
+    return -1;
+
+  if(dctx->intfcArray != NULL)
+    {
+      free(dctx->intfcArray);
+    }
+
+  return ietf_initSwInterfaceDumpCTX(dctx);
+}
+vapi_error_e
+ietf_sw_interface_dump_cb (struct vapi_ctx_s *ctx, void *callback_ctx,
+                      vapi_error_e rv, bool is_last,
+                      vapi_payload_sw_interface_details * reply)
+{
+  ietf_sw_interface_dump_ctx *dctx = callback_ctx;
+  if (is_last)
+    {
+      dctx->last_called = true;
+    }
+  else
+    {
+      if(dctx->capacity == 0 && dctx->intfcArray == NULL)
+        {
+          dctx->capacity = 10;
+          dctx->intfcArray = (hicnIntfc*)malloc( sizeof(hicnIntfc)*dctx->capacity );
+        }
+      if(dctx->num_ifs >= dctx->capacity-1)
+        {
+
+          dctx->capacity += 10;
+          dctx->intfcArray = (hicnIntfc*)realloc(dctx->intfcArray, sizeof(hicnIntfc)*dctx->capacity );
+        }
+
+      hicnIntfc * thisIntfc = &dctx->intfcArray[dctx->num_ifs];
+
+      thisIntfc->sw_if_index = reply->sw_if_index;
+      memcpy(thisIntfc->interface_name, reply->interface_name, VPP_INTFC_NAME_LEN);
+      thisIntfc->l2_address_length = reply->l2_address_length;
+      memcpy(thisIntfc->l2_address, reply->l2_address, reply->l2_address_length );
+     //thisIntfc->link_speed = reply->link_speed;
+#define ONE_MEGABIT (uint64_t)1000000
+      switch (reply->link_speed << VNET_HW_INTERFACE_FLAG_SPEED_SHIFT)
+        {
+        default:
+          thisIntfc->link_speed = 0;
+          break;
+        }
+
+        thisIntfc->link_mtu = reply->link_mtu;
+        thisIntfc->admin_up_down = reply->admin_up_down;
+        thisIntfc->link_up_down = reply->link_up_down;
+
+      dctx->num_ifs += 1;
+    }
+  return VAPI_OK;
+}
+
+static i32 ietf_interface_name2index(const char *name, u32* if_index)
+{
+  ARG_CHECK2(-1, name, if_index);
+
+  i32 ret = -1;
+  ietf_sw_interface_dump_ctx dctx = {false, 0, 0, 0};
+  vapi_msg_sw_interface_dump *dump;
+  vapi_error_e rv;
+  dctx.last_called = false;
+
+  dump = vapi_alloc_sw_interface_dump(g_vapi_ctx_instance);
+  dump->payload.name_filter_valid = true;
+  memcpy(dump->payload.name_filter, name, sizeof(dump->payload.name_filter));
+
+  while (VAPI_EAGAIN == (rv = vapi_sw_interface_dump(g_vapi_ctx_instance, dump, ietf_sw_interface_dump_cb, &dctx)))
+    ;
+
+  int i = 0;
+  for (; i < dctx.num_ifs; ++i)
+  {
+    if (strcmp(dctx.intfcArray[i].interface_name, name) == 0)
+    {
+      *if_index = dctx.intfcArray[i].sw_if_index;
+      ret = 0;
+      break;
+    }
+  }
+  ietf_freeSwInterfaceDumpCTX(&dctx);
+
+  return ret;
+}
+
+i32 ietf_interface_add_del_addr( u32 sw_if_index, u8 is_add, u8 is_ipv6, u8 del_all,
+			       u8 address_length, u8 address[VPP_IP6_ADDRESS_LEN] )
+{
+  i32 ret = -1;
+  vapi_msg_sw_interface_add_del_address *msg = vapi_alloc_sw_interface_add_del_address(g_vapi_ctx_instance);
+  msg->payload.sw_if_index = sw_if_index;
+  msg->payload.is_add = is_add;
+  msg->payload.is_ipv6 = is_ipv6;
+  msg->payload.del_all = del_all;
+  msg->payload.address_length = address_length;
+  memcpy(msg->payload.address, address, VPP_IP6_ADDRESS_LEN);
+  vapi_msg_sw_interface_add_del_address_hton (msg);
+
+  vapi_send (g_vapi_ctx_instance, msg);
+
+  vapi_msg_sw_interface_add_del_address_reply *resp;
+
+  HICN_VPP_VAPI_RECV;
+
+  vapi_msg_sw_interface_add_del_address_reply_hton(resp);
+  ret = resp->payload.retval;
+  vapi_msg_free (g_vapi_ctx_instance, resp);
+  return ret;
+}
+
+i32 ietf_setInterfaceFlags(u32 sw_if_index, u8 admin_up_down)
+{
+  i32 ret = -1;
+  vapi_msg_sw_interface_set_flags *msg = vapi_alloc_sw_interface_set_flags(g_vapi_ctx_instance);
+  msg->payload.sw_if_index = sw_if_index;
+  msg->payload.admin_up_down = admin_up_down;
+  vapi_msg_sw_interface_set_flags_hton (msg);
+
+  vapi_send (g_vapi_ctx_instance, msg);
+
+  vapi_msg_sw_interface_set_flags_reply *resp;
+
+  HICN_VPP_VAPI_RECV;
+
+  vapi_msg_sw_interface_set_flags_reply_ntoh(resp);
+  ret = resp->payload.retval;
+  vapi_msg_free (g_vapi_ctx_instance, resp);
+  return ret;
+}
+
+
+/**
+ * @brief Modify existing IPv4/IPv6 config on an interface.
+ */
+static int
+interface_ipv46_config_modify(sr_session_ctx_t *session, const char *if_name,
+        sr_val_t *old_val, sr_val_t *new_val, bool is_ipv6)
+{
+    sr_xpath_ctx_t xpath_ctx = { 0, };
+    char *addr_str = NULL;
+    uint8_t addr[16] = { 0, };
+    uint8_t prefix = 0;
+    int rc = SR_ERR_OK;
+
+    SRP_LOG_DBG("Updating IP config on interface '%s'.", if_name);
+
+    /* get old config to be deleted */
+    if (SR_UINT8_T == old_val->type) {
+        prefix = old_val->data.uint8_val;
+    } else if (SR_STRING_T == old_val->type) {
+        prefix = netmask_to_prefix(old_val->data.string_val);
+    } else {
+        return SR_ERR_INVAL_ARG;
+    }
+    addr_str = sr_xpath_key_value((char*)old_val->xpath, "address", "ip", &xpath_ctx);
+    ip_addr_str_to_binary(addr_str, addr, is_ipv6);
+    sr_xpath_recover(&xpath_ctx);
+
+    /* delete old IP config */
+    rc = interface_ipv46_config_add_remove(if_name, addr, prefix, is_ipv6, false /* remove */);
+    if (SR_ERR_OK != rc) {
+        SRP_LOG_ERR("Unable to remove old IP address config, rc=%d", rc);
+        return rc;
+    }
+
+    /* update the config with the new value */
+    if (sr_xpath_node_name_eq(new_val->xpath, "prefix-length")) {
+        prefix = new_val->data.uint8_val;
+    } else if (sr_xpath_node_name_eq(new_val->xpath, "netmask")) {
+        prefix = netmask_to_prefix(new_val->data.string_val);
+    }
+
+    /* set new IP config */
+    rc = interface_ipv46_config_add_remove(if_name, addr, prefix, is_ipv6, true /* add */);
+    if (SR_ERR_OK != rc) {
+        SRP_LOG_ERR("Unable to remove old IP address config, rc=%d", rc);
+        return rc;
+    }
+
+    return rc;
+}
+
+/**
+ * @brief Callback to be called by any config change in subtrees "/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/address"
+ * or "/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/address".
+ */
+static int
+ietf_interface_ipv46_address_change_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, };
+    bool is_ipv6 = false, has_addr = false, has_prefix = false;
+    uint8_t addr[16] = { 0, };
+    uint8_t prefix = 0;
+    char *node_name = NULL, *if_name = NULL;
+    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;
+    }
+    SRP_LOG_DBG("'%s' modified, event=%d", xpath, event);
+
+    /* check whether we are handling ipv4 or ipv6 config */
+    node_name = sr_xpath_node_idx((char*)xpath, 2, &xpath_ctx);
+    if (NULL != node_name && 0 == strcmp(node_name, "ipv6")) {
+        is_ipv6 = true;
+    }
+    sr_xpath_recover(&xpath_ctx);
+
+    /* 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;
+    }
+
+    /* 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)))) {
+
+        SRP_LOG_DBG("A change detected in '%s', op=%d", new_val ? new_val->xpath : old_val->xpath, op);
+        if_name = strdup(sr_xpath_key_value(new_val ? new_val->xpath : old_val->xpath, "interface", "name", &xpath_ctx));
+        sr_xpath_recover(&xpath_ctx);
+
+        switch (op) {
+            case SR_OP_CREATED:
+                if (SR_LIST_T == new_val->type) {
+                    /* create on list item - reset state vars */
+                    has_addr = has_prefix = false;
+                } else {
+                    if (sr_xpath_node_name_eq(new_val->xpath, "ip")) {
+                        ip_addr_str_to_binary(new_val->data.string_val, addr, is_ipv6);
+                        has_addr = true;
+                    } else if (sr_xpath_node_name_eq(new_val->xpath, "prefix-length")) {
+                        prefix = new_val->data.uint8_val;
+                        has_prefix = true;
+                    } else if (sr_xpath_node_name_eq(new_val->xpath, "netmask")) {
+                        prefix = netmask_to_prefix(new_val->data.string_val);
+                        has_prefix = true;
+                    }
+                    if (has_addr && has_prefix) {
+                        op_rc = interface_ipv46_config_add_remove(if_name, addr, prefix, is_ipv6, true /* add */);
+                    }
+                }
+                break;
+            case SR_OP_MODIFIED:
+                op_rc = interface_ipv46_config_modify(session, if_name, old_val, new_val, is_ipv6);
+                break;
+            case SR_OP_DELETED:
+                if (SR_LIST_T == old_val->type) {
+                    /* delete on list item - reset state vars */
+                    has_addr = has_prefix = false;
+                } else {
+                    if (sr_xpath_node_name_eq(old_val->xpath, "ip")) {
+                        ip_addr_str_to_binary(old_val->data.string_val, addr, is_ipv6);
+                        has_addr = true;
+                    } else if (sr_xpath_node_name_eq(old_val->xpath, "prefix-length")) {
+                        prefix = old_val->data.uint8_val;
+                        has_prefix = true;
+                    } else if (sr_xpath_node_name_eq(old_val->xpath, "netmask")) {
+                        prefix = netmask_to_prefix(old_val->data.string_val);
+                        has_prefix = true;
+                    }
+                    if (has_addr && has_prefix) {
+                        op_rc = interface_ipv46_config_add_remove(if_name, addr, prefix, is_ipv6, false /* !add */);
+                    }
+                }
+                break;
+            default:
+                break;
+        }
+        if (SR_ERR_INVAL_ARG == op_rc) {
+            sr_set_error(session, "Invalid interface name.", new_val ? new_val->xpath : old_val->xpath);
+        }
+        free(if_name);
+        sr_free_val(old_val);
+        sr_free_val(new_val);
+    }
+    sr_free_change_iter(iter);
+
+    return op_rc;
+}
+
+/**
+ * @brief Callback to be called by any config change under "/ietf-interfaces:interfaces-state/interface" path.
+ * Does not provide any functionality, needed just to cover not supported config leaves.
+ */
+static int
+ietf_interface_change_cb(sr_session_ctx_t *session, const char *xpath, sr_notif_event_t event, void *private_ctx)
+{
+    SRP_LOG_DBG("'%s' modified, event=%d", xpath, event);
+
+    return SR_ERR_OK;
+}
+
+
+int ietf_subscribe_events(sr_session_ctx_t *session,
+                          sr_subscription_ctx_t **subscription){
+
+    int rc = SR_ERR_OK;
+    SRP_LOG_DBG_MSG("Subscriging ietf.");
+
+    //
+    rc = sr_subtree_change_subscribe(session, "/ietf-interfaces:interfaces/interface", ietf_interface_change_cb,
+                                             NULL,
+                                             0, SR_SUBSCR_CTX_REUSE | SR_SUBSCR_EV_ENABLED, subscription);
+
+    if (rc != SR_ERR_OK) {
+        SRP_LOG_DBG_MSG("Problem in subscription /ietf-interfaces:interfaces/interface\n");
+        goto error;
+    }
+
+    rc = sr_subtree_change_subscribe(session, "/ietf-interfaces:interfaces/interface/enabled", ietf_interface_enable_disable_cb,
+                                             NULL,
+                                             100, SR_SUBSCR_CTX_REUSE | SR_SUBSCR_EV_ENABLED, subscription);
+    if (rc != SR_ERR_OK) {
+        SRP_LOG_DBG_MSG("Problem in subscription /ietf-interfaces:interfaces/interface/enabled\n");
+        goto error;
+    }
+
+    rc = sr_subtree_change_subscribe(session, "/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/address", ietf_interface_ipv46_address_change_cb,
+                                             NULL,
+                                          99, SR_SUBSCR_CTX_REUSE | SR_SUBSCR_EV_ENABLED, subscription);
+
+    if (rc != SR_ERR_OK) {
+        SRP_LOG_DBG_MSG("Problem in subscription /ietf-interfaces:interfaces/interface/ietf-ip:ipv4/address\n");
+        goto error;
+    }
+
+    rc = sr_subtree_change_subscribe(session, "/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/address", ietf_interface_ipv46_address_change_cb,
+                                             NULL,
+                                             98, SR_SUBSCR_CTX_REUSE | SR_SUBSCR_EV_ENABLED, subscription);
+
+    if (rc != SR_ERR_OK) {
+        SRP_LOG_DBG_MSG("Problem in subscription /ietf-interfaces:interfaces/interface/ietf-ip:ipv6/address\n");
+        goto error;
+    }
+
+ /*   rc = sr_dp_get_items_subscribe(session, "/ietf-interfaces:interfaces-state", ietf_interface_state_cb,
+                                           NULL, SR_SUBSCR_CTX_REUSE,
+                                           subscription);
+    if (rc != SR_ERR_OK) {
+    SRP_LOG_DBG_MSG("Problem in subscription /ietf-interfaces:interfaces-state\n");
+    goto error;
+    }*/
+
+
+  SRP_LOG_INF_MSG("ietf initialized successfully.");
+  return SR_ERR_OK;
+
+  error:
+  SRP_LOG_ERR_MSG("Error by initialization of the ietf.");
+  return rc;
+}
diff --git a/ctrl/sysrepo-plugins/hicn-plugin/plugin/ietf/ietf_interface.h b/ctrl/sysrepo-plugins/hicn-plugin/plugin/ietf/ietf_interface.h
new file mode 100644
index 000000000..0f6c7f8b4
--- /dev/null
+++ b/ctrl/sysrepo-plugins/hicn-plugin/plugin/ietf/ietf_interface.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2018 HUACHENTEL 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_INTERFACE_H__
+#define __IETF_INTERFACE_H__
+
+int ietf_subscribe_events(sr_session_ctx_t *session,
+                          sr_subscription_ctx_t **subscription);
+
+
+#endif /* __IETF_INTERFACE_H__ */
diff --git a/ctrl/sysrepo-plugins/hicn-plugin/plugin/model/hicn_model.c b/ctrl/sysrepo-plugins/hicn-plugin/plugin/model/hicn_model.c
new file mode 100644
index 000000000..b49839c53
--- /dev/null
+++ b/ctrl/sysrepo-plugins/hicn-plugin/plugin/model/hicn_model.c
@@ -0,0 +1,1455 @@
+/*
+* 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.
+*/
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <malloc.h>
+#include <sysrepo/xpath.h>
+#include <inttypes.h>
+#include <unistd.h>
+#include <pthread.h>
+
+
+
+#include <sched.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"
+
+
+DEFINE_VAPI_MSG_IDS_HICN_API_JSON
+
+
+// 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;
+volatile hicn_faces_t *  hicn_faces = NULL;
+//volatile hicn_face_stat_t * hicn_face_stat=NULL;
+struct hicn_faces_s * current = NULL;
+//volatile hicn_state_face_t * hicn_state_face=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_faces = memalign(MEM_ALIGN, sizeof(hicn_faces_t) );
+ hicn_faces->next=memalign(MEM_ALIGN, sizeof(struct hicn_faces_s));
+ current=hicn_faces->next;
+
+//  hicn_state_face = memalign(MEM_ALIGN, sizeof(hicn_state_face_t) );
+//  memset((hicn_state_face_t *) hicn_state_face, 0, sizeof(hicn_state_face_t));
+
+ int retval=-1;
+ ARG_CHECK6(retval, hicn_state, hicn_strategy, hicn_strategies, hicn_route, current, hicn_faces);
+ hicn_faces->nface=0;
+ retval=0;
+
+ return retval;
+}
+
+
+static int init_face_pool(struct hicn_faces_s * head){
+
+ ARG_CHECK(HICN_EINVAL, head);
+ for(int i=0; i<MAX_FACE_POOL; i++){
+     head->next=memalign(MEM_ALIGN, sizeof(struct hicn_faces_s));
+     head=head->next;
+     SRP_LOG_DBG_MSG("Allocated\n");
+ }
+ head->next=NULL;
+ return HICN_OK;
+
+}
+
+static inline void  state_cache(vapi_msg_hicn_api_node_stats_get_reply * resp){
+   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->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;
+   SRP_LOG_DBG_MSG("state cached");
+}
+
+
+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  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/routes/faceids");
+ vals[0].type = SR_UINT16_T;
+ vals[0].data.uint32_val = hicn_route->faceids[0];
+
+ sr_val_set_xpath(&vals[1], "/hicn:hicn-state/routes/strategy_id");
+ vals[1].type = SR_UINT32_T;
+ vals[1].data.uint32_val = hicn_route->strategy_id;
+}
+
+static inline int  faces_update(sr_val_t * vals, uint32_t nleaves){
+
+ struct hicn_faces_s * temp = hicn_faces->next;
+ int face =0;
+
+ for(int count=0; count<nleaves; count++){
+
+
+  // This part must be removed once the faceid is provided by the dump msg
+   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);
+   msg->payload.faceid = temp->face.faceid;
+   vapi_msg_hicn_api_face_ip_params_get_hton(msg);
+   params_send(msg,resp);
+   vapi_msg_hicn_api_face_ip_params_get_reply_ntoh(resp);
+   if(!resp->payload.retval){
+     SRP_LOG_DBG("faceid(%d)-->intfc(%d)", temp->face.faceid, resp->payload.swif);
+     temp->face.intfc= resp->payload.swif;
+   }
+
+
+   sr_val_build_xpath(&vals[face], "%s[faceid='%d']/intfc", "/hicn:hicn-state/faces/face",
+   temp->face.faceid);
+   vals[face].type = SR_UINT32_T;
+   vals[face].data.uint32_val = temp->face.intfc;
+
+
+   face++;
+
+
+   sr_val_build_xpath(&vals[face], "%s[faceid='%d']/irx_packets", "/hicn:hicn-state/faces/face",
+   temp->face.faceid);
+   vals[face].type = SR_UINT64_T;
+   vals[face].data.uint64_val = temp->face.irx_packets;
+
+   face++;
+
+   sr_val_build_xpath(&vals[face], "%s[faceid='%d']/irx_bytes", "/hicn:hicn-state/faces/face",
+   temp->face.faceid);
+   vals[face].type = SR_UINT64_T;
+   vals[face].data.uint64_val = temp->face.irx_bytes;
+
+   face++;
+
+   sr_val_build_xpath(&vals[face], "%s[faceid='%d']/itx_packets", "/hicn:hicn-state/faces/face",
+   temp->face.faceid);
+   vals[face].type = SR_UINT64_T;
+   vals[face].data.uint64_val = temp->face.itx_packets;
+
+   face++;
+
+   sr_val_build_xpath(&vals[face], "%s[faceid='%d']/itx_bytes", "/hicn:hicn-state/faces/face",
+   temp->face.faceid);
+   vals[face].type = SR_UINT64_T;
+   vals[face].data.uint64_val = temp->face.itx_bytes;
+
+   face++;
+
+   sr_val_build_xpath(&vals[face], "%s[faceid='%d']/drx_packets", "/hicn:hicn-state/faces/face",
+   temp->face.faceid);
+   vals[face].type = SR_UINT64_T;
+   vals[face].data.uint64_val = temp->face.drx_packets;
+
+   face++;
+
+   sr_val_build_xpath(&vals[face], "%s[faceid='%d']/drx_bytes", "/hicn:hicn-state/faces/face",
+   temp->face.faceid);
+   vals[face].type = SR_UINT64_T;
+   vals[face].data.uint64_val = temp->face.drx_bytes;
+
+   face++;
+
+   sr_val_build_xpath(&vals[face], "%s[faceid='%d']/dtx_packets", "/hicn:hicn-state/faces/face",
+   temp->face.faceid);
+   vals[face].type = SR_UINT64_T;
+   vals[face].data.uint64_val = temp->face.dtx_packets;
+
+   face++;
+
+   sr_val_build_xpath(&vals[face], "%s[faceid='%d']/dtx_bytes", "/hicn:hicn-state/faces/face",
+   temp->face.faceid);
+   vals[face].type = SR_UINT64_T;
+   vals[face].data.uint64_val = temp->face.dtx_bytes;
+
+   face++;
+
+   SRP_LOG_DBG(" **********************face is: %d-%d-%d ****************\n",temp->face.dtx_bytes,temp->face.drx_bytes,temp->face.faceid);
+
+   printf("%" PRId64 "\n", temp->face.drx_bytes);
+
+   temp=temp->next;
+
+ }
+ SRP_LOG_DBG_MSG("Faces state updated \n");
+ return SR_ERR_OK;
+}
+
+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);
+ tlock(state);
+ state_update(vals);
+ tunlock(state);
+
+ *values = vals;
+ *values_cnt = NSTATE_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);
+ tlock(strategies);
+ strategies_update(vals);
+ tunlock(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, "routes")) {
+   SRP_LOG_DBG_MSG("Requesting state is not for routes");
+   *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);
+ tlock(route);
+ route_update(vals);
+ tunlock(route);
+
+ *values = vals;
+ *values_cnt = NROUTE_LEAVES;
+ return SR_ERR_OK;
+
+ }
+
+
+ static int hicn_state_faces_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 faces;
+ faces=lfaces;
+ uint32_t NFACES_NODES = hicn_faces->nface * FACES_CHILDREN;
+
+ if (! sr_xpath_node_name_eq(xpath, "faces")) {
+   SRP_LOG_DBG_MSG("Requesting state is not for faces");
+   *values = NULL;
+   *values_cnt = 0;
+   return SR_ERR_OK;
+ }
+
+ // We should only consider the number of leaves not the head of list(faceid)
+ rc = sr_new_values(NFACES_NODES, &vals);
+ if (SR_ERR_OK != rc) {
+   return rc;
+ }
+
+ SRP_LOG_DBG("Requesting state data for '%s'", xpath);
+
+ tlock(faces);
+ SRP_LOG_DBG("**********NFACES-LEAVES '%d'  *********", NFACES_NODES);
+ faces_update(vals, NFACES_NODES/FACES_CHILDREN);
+ tunlock(faces);
+ //hicn_faces->nface=0;
+ *values = vals;
+ *values_cnt = NFACES_NODES;
+ 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);
+ SRP_LOG_DBG("H:recv msgid [%d]\n", msg->header._vl_msg_id);                     \
+
+ // 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);
+ }
+
+ vapi_msg_hicn_api_node_params_set_hton(msg);
+
+ params_send(msg, resp);
+
+ vapi_msg_hicn_api_node_params_set_reply_ntoh(resp);
+
+ if(!resp->payload.retval){
+     SRP_LOG_DBG_MSG("Successfully done");
+     sr_free_change_iter(iter);
+     return SR_ERR_OK;
+ }
+ SRP_LOG_DBG_MSG("Operation failed");
+ return SR_ERR_OPERATION_FAILED;
+}
+
+/**
+* @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);
+ params_send(msg, resp);
+ vapi_msg_hicn_api_node_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 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;
+ msg = vapi_alloc_hicn_api_node_stats_get(g_vapi_ctx_instance);
+
+ vapi_msg_hicn_api_node_stats_get_hton(msg);
+ params_send(msg,resp);
+ 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;
+ }
+ tlock(state);
+
+ state_cache(resp);
+
+ tunlock(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");
+ 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);
+ params_send(msg,resp);
+ 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");
+ 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);
+ params_send(msg,resp);
+ 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");
+ 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;
+   inet_pton(AF_INET,  input[0].data.string_val, &(sa.sin_addr));
+   unsigned char * tmp = (unsigned char *) &sa.sin_addr.s_addr;
+   memcpy(&msg->payload.prefix[0],tmp,B32);
+
+
+ }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 * tmp = (unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+   memcpy(&msg->payload.prefix[0],tmp,B64);
+   memcpy(&msg->payload.prefix[1],tmp+B64,B64);
+
+ }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);
+ params_send(msg,resp);
+ 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");
+ 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);
+
+ if(strcmp(input[0].data.string_val,"-1")){
+
+   struct sockaddr_in sa;
+   inet_pton(AF_INET,  input[0].data.string_val, &(sa.sin_addr));
+   unsigned char * tmp = (unsigned char *) &sa.sin_addr.s_addr;
+   memcpy(&msg->payload.prefix[0],tmp,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 * tmp = (unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+   memcpy(&msg->payload.prefix[0],tmp,B64);
+   memcpy(&msg->payload.prefix[1],tmp+B64,B64);
+
+ }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;
+
+ vapi_msg_hicn_api_route_nhops_add_hton(msg);
+ params_send(msg,resp);
+ 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");
+ 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;
+   inet_pton(AF_INET,  input[0].data.string_val, &(sa.sin_addr));
+   unsigned char * tmp = (unsigned char *) &sa.sin_addr.s_addr;
+   memcpy(&msg->payload.prefix[0],tmp,B32);
+
+
+ }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 * tmp = (unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+   memcpy(&msg->payload.prefix[0],tmp,B64);
+   memcpy(&msg->payload.prefix[1],tmp+B64,B64);
+
+ }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);
+ params_send(msg,resp);
+ 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");
+ 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.uint32_val;
+
+ vapi_msg_hicn_api_face_ip_params_get_hton(msg);
+ params_send(msg,resp);
+ vapi_msg_hicn_api_face_ip_params_get_reply_ntoh(resp);
+
+ if(!resp->payload.retval){
+     SRP_LOG_DBG("faceid(%d)-->intfc(%d)",input[0].data.uint32_val, resp->payload.swif);
+     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 * tmp =  (unsigned char *) &sa.sin_addr.s_addr;
+   memcpy(&msg->payload.prefix[0],tmp,B32);
+
+
+ }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 * tmp =(unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+   memcpy(&msg->payload.prefix[0],tmp,B64);
+   memcpy(&msg->payload.prefix[1],tmp+B64,B64);
+
+ }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);
+ params_send(msg,resp);
+ 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);
+  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 * tmp = (unsigned char *) &sa.sin_addr.s_addr;
+   memcpy(&msg->payload.prefix[0],tmp,B32);
+
+
+ }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 * tmp = (unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+   memcpy(&msg->payload.prefix[0],tmp,B64);
+   memcpy(&msg->payload.prefix[1],tmp+B64,B64);
+
+ }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.uint32_val;
+
+ vapi_msg_hicn_api_route_nhop_del_hton(msg);
+ params_send(msg,resp);
+ 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;
+   inet_pton(AF_INET,  input[0].data.string_val, &(sa.sin_addr));
+   unsigned char * tmp = (unsigned char *) &sa.sin_addr.s_addr;
+   memcpy(&msg->payload.prefix[0],tmp,B32);
+
+
+ }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 * tmp = (unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+   memcpy(&msg->payload.prefix[0],tmp,B64);
+   memcpy(&msg->payload.prefix[1],tmp+B64,B64);
+
+ }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);
+ params_send(msg,resp);
+ 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.uint32_val;
+
+ vapi_msg_hicn_api_face_ip_del_hton(msg);
+ params_send(msg,resp);
+ 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");
+
+
+ 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;
+     inet_pton(AF_INET,  input[0].data.string_val, &(sa.sin_addr));
+     unsigned char * tmp = (unsigned char *) &sa.sin_addr.s_addr;
+     memcpy(&msg->payload.local_addr[0],tmp,B32);
+
+ }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 * tmp = (unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+     memcpy(&msg->payload.local_addr[0],tmp,B64);
+     memcpy(&msg->payload.local_addr[1],tmp+B64,B64);
+
+ }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;
+     inet_pton(AF_INET,  input[2].data.string_val, &(sa.sin_addr));
+     unsigned char * tmp = (unsigned char *)&sa.sin_addr.s_addr;
+     memcpy(&msg->payload.remote_addr[0],tmp,B32);
+
+
+ }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 * tmp =(unsigned char *) ((struct in6_addr *)dst)->s6_addr;
+     memcpy(&msg->payload.remote_addr[0],tmp,B64);
+     memcpy(&msg->payload.remote_addr[1],tmp+B64,B64);
+
+ }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);
+ params_send(msg,resp);
+ vapi_msg_hicn_api_face_ip_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;
+}
+
+
+static vapi_error_e
+hicn_api_face_stats_dump_cb(struct vapi_ctx_s *ctx, void *callback_ctx,
+                    vapi_error_e rv, bool is_last,
+                    vapi_payload_hicn_api_face_stats_details *reply)
+{
+
+   static int counter = 0;
+/*
+   UNUSED(ctx); UNUSED(rv); UNUSED(is_last);
+   //struct elt **stackp;
+   ARG_CHECK2(VAPI_EINVAL, callback_ctx, reply);
+   stackp = (struct elt**) callback_ctx;
+   SRP_LOG_DBG("reply: %d:%d:%d", reply->faceid,reply->dtx_packets,reply->irx_packets);
+
+   vapi_payload_hicn_api_face_stats_details *passed;
+   ARG_CHECK2(VAPI_EINVAL, callback_ctx, reply);
+   passed = (vapi_payload_hicn_api_face_stats_details *) callback_ctx;
+   *passed = *reply;
+   SRP_LOG_DBG("reply %d", reply->faceid);*/
+
+   tlock(lfaces);
+   if (reply!=NULL){
+
+     current->face.faceid =  reply->faceid;
+     current->face.intfc =   1;
+     current->face.irx_packets = reply->irx_packets;
+     current->face.irx_bytes =   reply->irx_bytes;
+     current->face.itx_packets = reply->itx_packets;
+     current->face.itx_bytes =   reply->itx_bytes;
+     current->face.drx_packets = reply->drx_packets;
+     current->face.drx_bytes =   reply->drx_bytes;
+     current->face.dtx_packets = reply->dtx_packets;
+     current->face.dtx_bytes =   reply->dtx_bytes;
+     //hicn_faces->nface++; // Increment the number of faces
+     counter++;
+     current = current->next;
+     //current->next = memalign(MEM_ALIGN, sizeof(hicn_faces_t));
+     SRP_LOG_DBG_MSG("---------Face------- \n");
+     SRP_LOG_DBG("reply %d", reply->faceid);
+     SRP_LOG_DBG("reply %d", reply->drx_bytes);
+     SRP_LOG_DBG("reply %d", reply->dtx_bytes);
+
+   }else
+   {
+     hicn_faces->nface=counter;
+     counter=0;
+     current=hicn_faces->next;
+   }
+   tunlock(lfaces);
+   return SR_ERR_OK;
+}
+
+/**
+* @brief API to del hicn face state details in vpp.
+*/
+
+static int hicn_face_stats_details_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) {
+ //struct elt* stack=NULL ;
+ SRP_LOG_DBG_MSG("hicn face state details received successfully");
+ vapi_payload_hicn_api_face_stats_details resp={0};
+ vapi_msg_hicn_api_face_stats_dump *msg;
+ msg = vapi_alloc_hicn_api_face_stats_dump(g_vapi_ctx_instance);
+ vapi_hicn_api_face_stats_dump(g_vapi_ctx_instance, msg, hicn_api_face_stats_dump_cb, &resp);
+ return SR_ERR_OK;
+}
+
+
+/**
+* @brief Thread to update the state
+*/
+static void *state_thread(void *arg) {
+
+ // mapping can be retrieved by cpuinfo
+ int map = 0;
+ cpu_set_t cpuset;
+ CPU_ZERO(&cpuset);
+ CPU_SET(map, &cpuset);
+
+ // pin the thread to a core
+ if (pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset))
+ {
+     SRP_LOG_DBG_MSG("Thread pining failed\n");
+     exit(1);
+ }
+
+ vapi_msg_hicn_api_node_stats_get *msg=NULL;
+ vapi_msg_hicn_api_node_stats_get_reply *resp=NULL;
+ enum locks_name state;
+ state=lstate;
+
+ while(true){
+
+  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");
+     // Here I should think about a recovery method
+     return NULL;
+  }
+
+   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");
+       // Here I should think about a recovery method
+       return NULL;
+   }
+
+   //vapi_payload_hicn_api_face_stats_details  resp_dump={0};
+   vapi_msg_hicn_api_face_stats_dump *msg;
+   msg = vapi_alloc_hicn_api_face_stats_dump(g_vapi_ctx_instance);
+   vapi_hicn_api_face_stats_dump(g_vapi_ctx_instance, msg, hicn_api_face_stats_dump_cb, current);
+
+   tlock(state);
+   state_cache(resp);
+   SRP_LOG_DBG_MSG("state updated");
+   tunlock(state);
+   sleep(1);
+
+ }
+ return NULL;
+}
+
+/**
+* @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.");
+
+   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;
+   }
+   SRP_LOG_DBG_MSG("State thread created successfully.");
+
+   //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;
+   }
+
+   SRP_LOG_DBG_MSG("buffer initialized successfully.");
+
+
+   rc=init_face_pool(current);
+
+   if(rc!= SR_ERR_OK){
+       SRP_LOG_DBG_MSG("Problem in initializing the face pool\n");
+       goto error;
+   }
+
+
+   SRP_LOG_DBG_MSG("face pool created successfully.");
+
+
+   // 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 node-params-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-nhops-add\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_rpc_subscribe(session, "/hicn:face-stats-details", hicn_face_stats_details_cb,
+                       session, SR_SUBSCR_CTX_REUSE, subscription);
+ if (rc != SR_ERR_OK) {
+   SRP_LOG_DBG_MSG("Problem in subscription face-stats-details\n");
+   goto error;
+ }
+
+ // subscripe for edit-config
+ rc = sr_subtree_change_subscribe(
+     session, "/hicn:hicn-conf", hicn_node_params_set_cb, g_vapi_ctx_instance,
+     0, 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/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/routes",
+                                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/routes\n");
+   goto error;
+ }
+
+
+ rc = sr_dp_get_items_subscribe(session, "/hicn:hicn-state/faces",
+                                hicn_state_faces_cb, NULL, SR_SUBSCR_CTX_REUSE,
+                                subscription);
+ if (rc != SR_ERR_OK) {
+   SRP_LOG_DBG_MSG("Problem in subscription /hicn:hicn-state/faces\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/ctrl/sysrepo-plugins/hicn-plugin/plugin/model/hicn_model.h b/ctrl/sysrepo-plugins/hicn-plugin/plugin/model/hicn_model.h
new file mode 100644
index 000000000..6cb5d2710
--- /dev/null
+++ b/ctrl/sysrepo-plugins/hicn-plugin/plugin/model/hicn_model.h
@@ -0,0 +1,155 @@
+/*
+* 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
+#define B32 4
+#define B64 8
+
+// 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, lfaces};
+
+#define NSTATE_LEAVES 15
+#define NSTRATEGY_LEAVES 1
+#define NSTRATEGIES_LEAVES 2
+#define NROUTE_LEAVES 2
+#define MAX_FACE_POOL 100
+#define FACES_CHILDREN 9 /*this is the number of children of each leave*/
+
+
+#define  params_send( msg , resp ) \
+{  \
+ 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;   \
+};
+
+typedef struct __attribute__ ((__packed__)) {
+
+
+ int32_t retval;
+ 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;
+
+} 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__)) {
+ uint32_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;
+
+typedef struct __attribute__ ((__packed__)) {
+ uint32_t faceid;
+ uint32_t intfc;
+ uint64_t irx_packets;
+ uint64_t irx_bytes;
+ uint64_t itx_packets;
+ uint64_t itx_bytes;
+ uint64_t drx_packets;
+ uint64_t drx_bytes;
+ uint64_t dtx_packets;
+ uint64_t dtx_bytes;
+} hicn_face_inf_t;
+
+
+struct  hicn_faces_s{
+ hicn_face_inf_t face;
+ struct hicn_faces_s * next;
+};
+
+typedef struct  __attribute__ ((__packed__)) {
+ uint32_t nface;
+ struct hicn_faces_s * next;
+} hicn_faces_t;
+
+// typedef struct __attribute__ ((__packed__)) {
+//   int32_t retval;
+//   uint32_t faceid;
+//   uint64_t irx_packets;
+//   uint64_t irx_bytes;
+//   uint64_t itx_packets;
+//   uint64_t itx_bytes;
+//   uint64_t drx_packets;
+//   uint64_t drx_bytes;
+//   uint64_t dtx_packets;
+//   uint64_t dtx_bytes;
+// } hicn_face_stat_t;
+
+// typedef struct __attribute__ ((__packed__)) {
+
+//   int32_t retval;
+//   uint32_t faceid;
+//   uint64_t irx_packets;
+//   uint64_t irx_bytes;
+//   uint64_t itx_packets;
+//   uint64_t itx_bytes;
+//   uint64_t drx_packets;
+//   uint64_t drx_bytes;
+//   uint64_t dtx_packets;
+//   uint64_t dtx_bytes;
+
+// } hicn_state_face_t;
+
+
+int hicn_subscribe_events(sr_session_ctx_t *session,
+                         sr_subscription_ctx_t **subscription);
+
+#endif /* __IETF_HICN_H__ */
diff --git a/ctrl/sysrepo-plugins/hicn-plugin/plugin/model/tlock.c b/ctrl/sysrepo-plugins/hicn-plugin/plugin/model/tlock.c
new file mode 100644
index 000000000..d27ae6492
--- /dev/null
+++ b/ctrl/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 tlock(int Lock_Number ){
+
+ int my_ticket =   __sync_fetch_and_add(&En[Lock_Number] , 1  );
+ while (    my_ticket != De[ Lock_Number ]  ) {};
+
+}
+
+void tunlock(int Lock_Number ){
+De[Lock_Number]++;
+}
diff --git a/ctrl/sysrepo-plugins/hicn-plugin/plugin/model/tlock.h b/ctrl/sysrepo-plugins/hicn-plugin/plugin/model/tlock.h
new file mode 100644
index 000000000..8cdfc8b5b
--- /dev/null
+++ b/ctrl/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 tlock(int Lock_Number );
+void tunlock(int Lock_Number );
+
+#endif /* __IETF_HICN_H__ */
\ No newline at end of file