rrc_gNB_NGAP.c 56.1 KB
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/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.1  (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.openairinterface.org/?page_id=698
 *
 * 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.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

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/*! \file rrc_gNB_NGAP.h
 * \brief rrc NGAP procedures for gNB
 * \author Yoshio INOUE, Masayuki HARADA
 * \date 2020
 * \version 0.1
 * \email: yoshio.inoue@fujitsu.com,masayuki.harada@fujitsu.com
 *         (yoshio.inoue%40fujitsu.com%2cmasayuki.harada%40fujitsu.com) 
 */

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#include "rrc_gNB_NGAP.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
#include "rrc_eNB_S1AP.h"
#include "gnb_config.h"
#include "common/ran_context.h"
#include "gtpv1u.h"

#include "asn1_conversions.h"
#include "intertask_interface.h"
#include "pdcp.h"
#include "pdcp_primitives.h"

#include "msc.h"

#include "gtpv1u_eNB_task.h"
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#include "gtpv1u_gNB_task.h"
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#include "RRC/LTE/rrc_eNB_GTPV1U.h"
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#include "RRC/NR/rrc_gNB_GTPV1U.h"
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#include "S1AP_NAS-PDU.h"
#include "executables/softmodem-common.h"
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#include "UTIL/OSA/osa_defs.h"
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#include "ngap_gNB_defs.h"
#include "ngap_gNB_ue_context.h"
#include "ngap_gNB_management_procedures.h"
#include "NR_ULInformationTransfer.h"
#include "RRC/NR/MESSAGES/asn1_msg.h"
#include "NR_UERadioAccessCapabilityInformation.h"
#include "NR_UE-CapabilityRAT-ContainerList.h"
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extern RAN_CONTEXT_t RC;

/* Value to indicate an invalid UE initial id */
static const uint16_t UE_INITIAL_ID_INVALID = 0;

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/* Masks for NGAP Encryption algorithms, NEA0 is always supported (not coded) */
static const uint16_t NGAP_ENCRYPTION_NEA1_MASK = 0x8000;
static const uint16_t NGAP_ENCRYPTION_NEA2_MASK = 0x4000;
static const uint16_t NGAP_ENCRYPTION_NEA3_MASK = 0x2000;

/* Masks for NGAP Integrity algorithms, NIA0 is always supported (not coded) */
static const uint16_t NGAP_INTEGRITY_NIA1_MASK = 0x8000;
static const uint16_t NGAP_INTEGRITY_NIA2_MASK = 0x4000;
static const uint16_t NGAP_INTEGRITY_NIA3_MASK = 0x2000;

#define INTEGRITY_ALGORITHM_NONE NR_IntegrityProtAlgorithm_nia0

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/*! \fn uint16_t get_next_ue_initial_id(uint8_t mod_id)
 *\brief provide an UE initial ID for NGAP initial communication.
 *\param mod_id Instance ID of gNB.
 *\return the UE initial ID.
 */
//------------------------------------------------------------------------------
static uint16_t
get_next_ue_initial_id(
    const module_id_t mod_id
)
//------------------------------------------------------------------------------
{
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  static uint16_t ue_initial_id[NUMBER_OF_gNB_MAX];
  ue_initial_id[mod_id]++;
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  /* Never use UE_INITIAL_ID_INVALID this is the invalid id! */
  if (ue_initial_id[mod_id] == UE_INITIAL_ID_INVALID) {
    ue_initial_id[mod_id]++;
  }
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  return ue_initial_id[mod_id];
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}

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//------------------------------------------------------------------------------
/*
* Get the UE NG struct containing hashtables NG_id/UE_id.
* Is also used to set the NG_id of the UE, depending on inputs.
*/
struct rrc_ue_ngap_ids_s *
rrc_gNB_NGAP_get_ue_ids(
    gNB_RRC_INST   *const rrc_instance_pP,
    const uint16_t ue_initial_id,
    const uint32_t gNB_ue_ngap_idP
)
//------------------------------------------------------------------------------
{
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    rrc_ue_ngap_ids_t *result = NULL;
    rrc_ue_ngap_ids_t *result2 = NULL;
  /*****************************/
  instance_t instance = 0;
  ngap_gNB_instance_t *ngap_gNB_instance_p = NULL;
  ngap_gNB_ue_context_t *ue_desc_p = NULL;
  rrc_gNB_ue_context_t *ue_context_p = NULL;
  /*****************************/
  hashtable_rc_t     h_rc;

  if (ue_initial_id != UE_INITIAL_ID_INVALID) {
    h_rc = hashtable_get(rrc_instance_pP->initial_id2_ngap_ids, (hash_key_t)ue_initial_id, (void **)&result);

    if (h_rc == HASH_TABLE_OK) {
      if (gNB_ue_ngap_idP > 0) {
        h_rc = hashtable_get(rrc_instance_pP->ngap_id2_ngap_ids, (hash_key_t)gNB_ue_ngap_idP, (void **)&result2);

        if (h_rc != HASH_TABLE_OK) { // this case is equivalent to associate gNB_ue_ngap_idP and ue_initial_id
          result2 = malloc(sizeof(*result2));

          if (NULL != result2) {
            *result2 = *result;
            result2->gNB_ue_ngap_id = gNB_ue_ngap_idP;
            result->gNB_ue_ngap_id  = gNB_ue_ngap_idP;
            h_rc = hashtable_insert(rrc_instance_pP->ngap_id2_ngap_ids, (hash_key_t)gNB_ue_ngap_idP, result2);

            if (h_rc != HASH_TABLE_OK) {
              LOG_E(NGAP, "[gNB %ld] Error while hashtable_insert in ngap_id2_ngap_ids gNB_ue_ngap_idP %"PRIu32"\n",
                    rrc_instance_pP - RC.nrrrc[0],
                    gNB_ue_ngap_idP);
            }
          }
        } else { // here we should check that the association was done correctly
          if ((result->ue_initial_id != result2->ue_initial_id) || (result->gNB_ue_ngap_id != result2->gNB_ue_ngap_id)) {
            LOG_E(NGAP, "[gNB %ld] Error while hashtable_get, two rrc_ue_ngap_ids_t that should be equal, are not:\n \
              ue_initial_id 1 = %"PRIu16",\n \
              ue_initial_id 2 = %"PRIu16",\n \
              gNB_ue_ngap_idP 1 = %"PRIu32",\n \
              gNB_ue_ngap_idP 2 = %"PRIu32"\n",
                  rrc_instance_pP - RC.nrrrc[0],
                  result->ue_initial_id,
                  result2->ue_initial_id,
                  result->gNB_ue_ngap_id,
                  result2->gNB_ue_ngap_id);
            // Still return *result
          }
        }
      } // end if if (gNB_ue_ngap_idP > 0)
    } else { // end if (h_rc == HASH_TABLE_OK)
      LOG_E(NGAP, "[gNB %ld] In hashtable_get, couldn't find in initial_id2_ngap_ids ue_initial_id %"PRIu16"\n",
            rrc_instance_pP - RC.nrrrc[0],
            ue_initial_id);
      return NULL;
      /*
      * At the moment this is written, this case shouldn't (cannot) happen and is equivalent to an error.
      * One could try to find the struct instance based on ngap_id2_ngap_ids and gNB_ue_ngap_idP (if > 0),
      * but this behavior is not expected at the moment.
      */
    } // end else (h_rc != HASH_TABLE_OK)
  } else { // end if (ue_initial_id != UE_INITIAL_ID_INVALID)
    if (gNB_ue_ngap_idP > 0) {
      h_rc = hashtable_get(rrc_instance_pP->ngap_id2_ngap_ids, (hash_key_t)gNB_ue_ngap_idP, (void **)&result);

      if (h_rc != HASH_TABLE_OK) {
        /*
        * This case is uncommon, but can happen when:
        * -> if the first NAS message was a Detach Request (non exhaustiv), the UE RRC context exist
        * but is not associated with gNB_ue_ngap_id
        * -> ... (?)
        */
        LOG_E(NGAP, "[gNB %ld] In hashtable_get, couldn't find in ngap_id2_ngap_ids gNB_ue_ngap_idP %"PRIu32", trying to find it through NGAP context\n",
              rrc_instance_pP - RC.nrrrc[0],
              gNB_ue_ngap_idP);
        instance = GNB_MODULE_ID_TO_INSTANCE(rrc_instance_pP - RC.nrrrc[0]); // get gNB instance
        ngap_gNB_instance_p = ngap_gNB_get_instance(instance); // get ngap_gNB_instance

        if (ngap_gNB_instance_p != NULL) {
          ue_desc_p = ngap_gNB_get_ue_context(ngap_gNB_instance_p, gNB_ue_ngap_idP); // get s1ap_eNB_ue_context
        } else {
          LOG_E(NGAP, "[gNB instance %d] Couldn't find the gNB NGAP context\n",
                instance);
          return NULL;
        }

        if (ue_desc_p != NULL) {
          struct ngap_gNB_ue_context_s *ngap_ue_context_p = NULL;

          if ((ngap_ue_context_p = RB_REMOVE(ngap_ue_map, &ngap_gNB_instance_p->ngap_ue_head, ue_desc_p)) != NULL) {
            LOG_E(NR_RRC, "Removed UE context gNB_ue_ngap_id %u\n", ngap_ue_context_p->gNB_ue_ngap_id);
            ngap_gNB_free_ue_context(ngap_ue_context_p);
          } else {
            LOG_E(NR_RRC, "Removing UE context gNB_ue_ngap_id %u: did not find context\n",ue_desc_p->gNB_ue_ngap_id);
          }

          return NULL; //skip the operation below to avoid loop
          result = rrc_gNB_NGAP_get_ue_ids(rrc_instance_pP, ue_desc_p->ue_initial_id, gNB_ue_ngap_idP);

          if (ue_desc_p->ue_initial_id != UE_INITIAL_ID_INVALID) {
            result = rrc_gNB_NGAP_get_ue_ids(rrc_instance_pP, ue_desc_p->ue_initial_id, gNB_ue_ngap_idP);
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            if (result != NULL) {
              ue_context_p = rrc_gNB_get_ue_context(RC.nrrrc[GNB_INSTANCE_TO_MODULE_ID(instance)], result->ue_rnti);

              if ((ue_context_p != NULL) && (ue_context_p->ue_context.gNB_ue_ngap_id == 0)) {
                ue_context_p->ue_context.gNB_ue_ngap_id = gNB_ue_ngap_idP;
              } else {
                LOG_E(NR_RRC, "[gNB %ld] Incoherence between RRC context and NGAP context (%d != %d) for UE RNTI %d or UE RRC context doesn't exist\n",
                      rrc_instance_pP - RC.nrrrc[0],
                      (ue_context_p==NULL)?99999:ue_context_p->ue_context.gNB_ue_ngap_id,
                      gNB_ue_ngap_idP,
                      result->ue_rnti);
              }
            }
          } else {
            LOG_E(NGAP, "[gNB %ld] NGAP context found but ue_initial_id is invalid (0)\n", rrc_instance_pP - RC.nrrrc[0]);
            return NULL;
          }
        } else {
          LOG_E(NGAP, "[gNB %ld] In hashtable_get, couldn't find in ngap_id2_ngap_ids gNB_ue_ngap_idP %"PRIu32", because ue_initial_id is invalid in NGAP context\n",
                rrc_instance_pP - RC.nrrrc[0],
                gNB_ue_ngap_idP);
          return NULL;
        }
      } // end if (h_rc != HASH_TABLE_OK)
    } // end if (gNB_ue_ngap_idP > 0)
  } // end else (ue_initial_id == UE_INITIAL_ID_INVALID)
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  return result;
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}

//------------------------------------------------------------------------------
static struct rrc_gNB_ue_context_s *
rrc_gNB_get_ue_context_from_ngap_ids(
    const instance_t  instanceP,
    const uint16_t    ue_initial_idP,
    const uint32_t    gNB_ue_ngap_idP
) 
//------------------------------------------------------------------------------
{
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  rrc_ue_ngap_ids_t *temp = NULL;
  temp = rrc_gNB_NGAP_get_ue_ids(RC.nrrrc[GNB_INSTANCE_TO_MODULE_ID(instanceP)], ue_initial_idP, gNB_ue_ngap_idP);
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  if (temp != NULL) {
    return rrc_gNB_get_ue_context(RC.nrrrc[GNB_INSTANCE_TO_MODULE_ID(instanceP)], temp->ue_rnti);
  }
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  return NULL;
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}

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/*! \fn void process_gNB_security_key (const protocol_ctxt_t* const ctxt_pP, eNB_RRC_UE_t * const ue_context_pP, uint8_t *security_key)
 *\brief save security key.
 *\param ctxt_pP         Running context.
 *\param ue_context_pP   UE context.
 *\param security_key_pP The security key received from NGAP.
 */
//------------------------------------------------------------------------------
void process_gNB_security_key (
  const protocol_ctxt_t *const ctxt_pP,
  rrc_gNB_ue_context_t  *const ue_context_pP,
  uint8_t               *security_key_pP
)
//------------------------------------------------------------------------------
{
  char ascii_buffer[65];
  uint8_t i;
  /* Saves the security key */
  memcpy (ue_context_pP->ue_context.kgnb, security_key_pP, SECURITY_KEY_LENGTH);
  memset (ue_context_pP->ue_context.nh, 0, SECURITY_KEY_LENGTH);
  ue_context_pP->ue_context.nh_ncc = -1;

  for (i = 0; i < 32; i++) {
    sprintf(&ascii_buffer[2 * i], "%02X", ue_context_pP->ue_context.kgnb[i]);
  }

  ascii_buffer[2 * i] = '\0';
  LOG_I(NR_RRC, "[gNB %d][UE %x] Saved security key %s\n", ctxt_pP->module_id, ue_context_pP->ue_context.rnti, ascii_buffer);
}

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//------------------------------------------------------------------------------
void
nr_rrc_pdcp_config_security(
    const protocol_ctxt_t  *const ctxt_pP,
    rrc_gNB_ue_context_t   *const ue_context_pP,
    const uint8_t          send_security_mode_command
)
//------------------------------------------------------------------------------
{
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  NR_SRB_ToAddModList_t              *SRB_configList = ue_context_pP->ue_context.SRB_configList;
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  (void)SRB_configList;
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  uint8_t                            *kRRCenc = NULL;
  uint8_t                            *kRRCint = NULL;
  uint8_t                            *kUPenc = NULL;
  pdcp_t                             *pdcp_p   = NULL;
  static int                          print_keys= 1;
  hashtable_rc_t                      h_rc;
  hash_key_t                          key;
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#ifndef PHYSIM
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    /* Derive the keys from kgnb */
    if (SRB_configList != NULL) {
        nr_derive_key_up_enc(ue_context_pP->ue_context.ciphering_algorithm,
                          ue_context_pP->ue_context.kgnb,
                          &kUPenc);
    }
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    nr_derive_key_rrc_enc(ue_context_pP->ue_context.ciphering_algorithm,
                          ue_context_pP->ue_context.kgnb,
                          &kRRCenc);
    nr_derive_key_rrc_int(ue_context_pP->ue_context.integrity_algorithm,
                          ue_context_pP->ue_context.kgnb,
                          &kRRCint);
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#endif
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  if (!IS_SOFTMODEM_IQPLAYER) {
    SET_LOG_DUMP(DEBUG_SECURITY) ;
  }
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  if ( LOG_DUMPFLAG( DEBUG_SECURITY ) ) {
    if (print_keys == 1 ) {
      print_keys =0;
      LOG_DUMPMSG(NR_RRC, DEBUG_SECURITY, ue_context_pP->ue_context.kgnb, 32,"\nKgNB:" );
      LOG_DUMPMSG(NR_RRC, DEBUG_SECURITY, kRRCenc, 32,"\nKRRCenc:" );
      LOG_DUMPMSG(NR_RRC, DEBUG_SECURITY, kRRCint, 32,"\nKRRCint:" );
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    }
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  }
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  key = PDCP_COLL_KEY_VALUE(ctxt_pP->module_id, ctxt_pP->rnti, ctxt_pP->enb_flag, DCCH, SRB_FLAG_YES);
  h_rc = hashtable_get(pdcp_coll_p, key, (void **)&pdcp_p);
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  if (h_rc == HASH_TABLE_OK) {
    pdcp_config_set_security(
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        ctxt_pP,
        pdcp_p,
        DCCH,
        DCCH+2,
        (send_security_mode_command == TRUE)  ?
        0 | (ue_context_pP->ue_context.integrity_algorithm << 4) :
        (ue_context_pP->ue_context.ciphering_algorithm )         |
        (ue_context_pP->ue_context.integrity_algorithm << 4),
        kRRCenc,
        kRRCint,
        kUPenc);
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  } else {
    LOG_E(NR_RRC,
        PROTOCOL_NR_RRC_CTXT_UE_FMT"Could not get PDCP instance for SRB DCCH %u\n",
        PROTOCOL_NR_RRC_CTXT_UE_ARGS(ctxt_pP),
        DCCH);
  }
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}

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//------------------------------------------------------------------------------
/*
* Initial UE NAS message on S1AP.
*/
void
rrc_gNB_send_NGAP_NAS_FIRST_REQ(
    const protocol_ctxt_t     *const ctxt_pP,
    rrc_gNB_ue_context_t      *ue_context_pP,
    NR_RRCSetupComplete_IEs_t *rrcSetupComplete
)
//------------------------------------------------------------------------------
{
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    // gNB_RRC_INST *rrc = RC.nrrrc[ctxt_pP->module_id];
    MessageDef         *message_p         = NULL;
    rrc_ue_ngap_ids_t  *rrc_ue_ngap_ids_p = NULL;
    hashtable_rc_t      h_rc;

    message_p = itti_alloc_new_message(TASK_RRC_GNB, NGAP_NAS_FIRST_REQ);
    memset(&message_p->ittiMsg.ngap_nas_first_req, 0, sizeof(ngap_nas_first_req_t));
    ue_context_pP->ue_context.ue_initial_id = get_next_ue_initial_id(ctxt_pP->module_id);
    NGAP_NAS_FIRST_REQ(message_p).ue_initial_id = ue_context_pP->ue_context.ue_initial_id;
    rrc_ue_ngap_ids_p = malloc(sizeof(rrc_ue_ngap_ids_t));
    rrc_ue_ngap_ids_p->ue_initial_id  = ue_context_pP->ue_context.ue_initial_id;
    rrc_ue_ngap_ids_p->gNB_ue_ngap_id = UE_INITIAL_ID_INVALID;
    rrc_ue_ngap_ids_p->ue_rnti        = ctxt_pP->rnti;
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    h_rc = hashtable_insert(RC.nrrrc[ctxt_pP->module_id]->initial_id2_ngap_ids,
                            (hash_key_t)ue_context_pP->ue_context.ue_initial_id,
                            rrc_ue_ngap_ids_p);

    if (h_rc != HASH_TABLE_OK) {
      LOG_E(NGAP, "[gNB %d] Error while hashtable_insert in initial_id2_ngap_ids ue_initial_id %u\n",
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            ctxt_pP->module_id,
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            ue_context_pP->ue_context.ue_initial_id);
    }

    /* Assume that cause is coded in the same way in RRC and NGap, just check that the value is in NGap range */
    AssertFatal(ue_context_pP->ue_context.establishment_cause < NGAP_RRC_CAUSE_LAST,
                "Establishment cause invalid (%jd/%d) for gNB %d!",
                ue_context_pP->ue_context.establishment_cause,
                NGAP_RRC_CAUSE_LAST,
                ctxt_pP->module_id);
    NGAP_NAS_FIRST_REQ(message_p).establishment_cause = ue_context_pP->ue_context.establishment_cause;
    
    /* Forward NAS message */
    NGAP_NAS_FIRST_REQ(message_p).nas_pdu.buffer = rrcSetupComplete->dedicatedNAS_Message.buf;
    NGAP_NAS_FIRST_REQ(message_p).nas_pdu.length = rrcSetupComplete->dedicatedNAS_Message.size;
    // extract_imsi(NGAP_NAS_FIRST_REQ (message_p).nas_pdu.buffer,
    //              NGAP_NAS_FIRST_REQ (message_p).nas_pdu.length,
    //              ue_context_pP);

    /* Fill UE identities with available information */
    NGAP_NAS_FIRST_REQ(message_p).ue_identity.presenceMask       = NGAP_UE_IDENTITIES_NONE;
    /* Fill s-TMSI */
    NGAP_NAS_FIRST_REQ(message_p).ue_identity.s_tmsi.amf_set_id  = ue_context_pP->ue_context.Initialue_identity_5g_s_TMSI.amf_set_id;
    NGAP_NAS_FIRST_REQ(message_p).ue_identity.s_tmsi.amf_pointer = ue_context_pP->ue_context.Initialue_identity_5g_s_TMSI.amf_pointer;
    NGAP_NAS_FIRST_REQ(message_p).ue_identity.s_tmsi.m_tmsi      = ue_context_pP->ue_context.Initialue_identity_5g_s_TMSI.fiveg_tmsi;

    /* selected_plmn_identity: IE is 1-based, convert to 0-based (C array) */
    int selected_plmn_identity = rrcSetupComplete->selectedPLMN_Identity - 1;
    NGAP_NAS_FIRST_REQ(message_p).selected_plmn_identity = selected_plmn_identity;

    if (rrcSetupComplete->registeredAMF != NULL) {
        NR_RegisteredAMF_t *r_amf = rrcSetupComplete->registeredAMF;
        NGAP_NAS_FIRST_REQ(message_p).ue_identity.presenceMask |= NGAP_UE_IDENTITIES_guami;

        if (r_amf->plmn_Identity != NULL) {
            if ((r_amf->plmn_Identity->mcc != NULL) && (r_amf->plmn_Identity->mcc->list.count > 0)) {
                /* Use first indicated PLMN MCC if it is defined */
                NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.mcc = *r_amf->plmn_Identity->mcc->list.array[selected_plmn_identity];
                LOG_I(NGAP, "[gNB %d] Build NGAP_NAS_FIRST_REQ adding in s_TMSI: GUMMEI MCC %u ue %x\n",
                    ctxt_pP->module_id,
                    NGAP_NAS_FIRST_REQ (message_p).ue_identity.guami.mcc,
                    ue_context_pP->ue_context.rnti);
            }

            if (r_amf->plmn_Identity->mnc.list.count > 0) {
                /* Use first indicated PLMN MNC if it is defined */
                NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.mnc = *r_amf->plmn_Identity->mnc.list.array[selected_plmn_identity];
                LOG_I(NGAP, "[gNB %d] Build NGAP_NAS_FIRST_REQ adding in s_TMSI: GUMMEI MNC %u ue %x\n",
                    ctxt_pP->module_id,
                    NGAP_NAS_FIRST_REQ (message_p).ue_identity.guami.mnc,
                    ue_context_pP->ue_context.rnti);
            }
        } else {
            /* TODO */
        }

        /* amf_Identifier */
        uint32_t amf_Id = BIT_STRING_to_uint32(&r_amf->amf_Identifier);
        NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.amf_region_id = amf_Id >> 16;
        NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.amf_set_id    = ue_context_pP->ue_context.Initialue_identity_5g_s_TMSI.amf_set_id;
        NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.amf_pointer   = ue_context_pP->ue_context.Initialue_identity_5g_s_TMSI.amf_pointer;

        ue_context_pP->ue_context.ue_guami.mcc = NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.mcc;
        ue_context_pP->ue_context.ue_guami.mnc = NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.mnc;
        ue_context_pP->ue_context.ue_guami.mnc_len = NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.mnc_len;
        ue_context_pP->ue_context.ue_guami.amf_region_id = NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.amf_region_id;
        ue_context_pP->ue_context.ue_guami.amf_set_id = NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.amf_set_id;
        ue_context_pP->ue_context.ue_guami.amf_pointer = NGAP_NAS_FIRST_REQ(message_p).ue_identity.guami.amf_pointer;

        MSC_LOG_TX_MESSAGE(MSC_NGAP_GNB,
                           MSC_NGAP_AMF,
                           (const char *)&message_p->ittiMsg.ngap_nas_first_req,
                           sizeof(ngap_nas_first_req_t),
                           MSC_AS_TIME_FMT" NGAP_NAS_FIRST_REQ gNB %u UE %x",
                           MSC_AS_TIME_ARGS(ctxt_pP),
                           ctxt_pP->module_id,
                           ctxt_pP->rnti);
        LOG_I(NGAP, "[gNB %d] Build NGAP_NAS_FIRST_REQ adding in s_TMSI: GUAMI amf_set_id %u amf_region_id %u ue %x\n",
              ctxt_pP->module_id,
              NGAP_NAS_FIRST_REQ (message_p).ue_identity.guami.amf_set_id,
              NGAP_NAS_FIRST_REQ (message_p).ue_identity.guami.amf_region_id,
              ue_context_pP->ue_context.rnti);
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    }

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  itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, message_p);
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}

//------------------------------------------------------------------------------
int
rrc_gNB_process_NGAP_INITIAL_CONTEXT_SETUP_REQ(
    MessageDef *msg_p,
    const char *msg_name,
    instance_t instance
)
//------------------------------------------------------------------------------
{
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    uint16_t                        ue_initial_id;
    uint32_t                        gNB_ue_ngap_id;
    rrc_gNB_ue_context_t            *ue_context_p = NULL;
    protocol_ctxt_t                 ctxt;
    uint8_t                         pdu_sessions_done = 0;
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    ue_initial_id  = NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).ue_initial_id;
    gNB_ue_ngap_id = NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).gNB_ue_ngap_id;
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    ue_context_p   = rrc_gNB_get_ue_context_from_ngap_ids(instance, ue_initial_id, gNB_ue_ngap_id);
    LOG_I(NR_RRC, "[gNB %d] Received %s: ue_initial_id %d, gNB_ue_ngap_id %d \n",
        instance, msg_name, ue_initial_id, gNB_ue_ngap_id);
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    if (ue_context_p == NULL) {
        /* Can not associate this message to an UE index, send a failure to NGAP and discard it! */
        MessageDef *msg_fail_p = NULL;
        LOG_W(NR_RRC, "[gNB %d] In NGAP_INITIAL_CONTEXT_SETUP_REQ: unknown UE from NGAP ids (%d, %d)\n", instance, ue_initial_id, gNB_ue_ngap_id);
        msg_fail_p = itti_alloc_new_message (TASK_RRC_GNB, NGAP_INITIAL_CONTEXT_SETUP_FAIL);
        NGAP_INITIAL_CONTEXT_SETUP_FAIL (msg_fail_p).gNB_ue_ngap_id = gNB_ue_ngap_id;
        // TODO add failure cause when defined!
        itti_send_msg_to_task (TASK_NGAP, instance, msg_fail_p);
        return (-1);
    } else {
        PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, GNB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
        ue_context_p->ue_context.gNB_ue_ngap_id = NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).gNB_ue_ngap_id;
        ue_context_p->ue_context.amf_ue_ngap_id = NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).amf_ue_ngap_id;
        ue_context_p->ue_context.nas_pdu_flag = NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).nas_pdu_flag;
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        if (NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).nb_of_pdusessions != 0) {
          ue_context_p->ue_context.nb_of_pdusessions = NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).nb_of_pdusessions;
          for (int i = 0; i < NR_NB_RB_MAX - 3; i++) {
            if(ue_context_p->ue_context.pdusession[i].status >= PDU_SESSION_STATUS_DONE)
                continue;
              ue_context_p->ue_context.pdusession[i].status = PDU_SESSION_STATUS_NEW;
              ue_context_p->ue_context.pdusession[i].param  = NGAP_INITIAL_CONTEXT_SETUP_REQ (msg_p).pdusession_param[pdu_sessions_done];
              pdu_sessions_done++;
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              // TODO establish PDU SESSION
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              if(pdu_sessions_done >= NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).nb_of_pdusessions) {
                break;
              }
          }
        }
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        /* NAS PDU */
        ue_context_p->ue_context.nas_pdu_flag = NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).nas_pdu_flag;
        if (ue_context_p->ue_context.nas_pdu_flag == 1) {
            ue_context_p->ue_context.nas_pdu.length = NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).nas_pdu.length;
            ue_context_p->ue_context.nas_pdu.buffer = NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).nas_pdu.buffer;
        }
        
        /* security */
        rrc_gNB_process_security(&ctxt, ue_context_p, &(NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).security_capabilities));
        process_gNB_security_key (
          &ctxt,
          ue_context_p,
          NGAP_INITIAL_CONTEXT_SETUP_REQ(msg_p).security_key);
        
        uint8_t send_security_mode_command = TRUE;
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        nr_rrc_pdcp_config_security(
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            &ctxt,
            ue_context_p,
            send_security_mode_command);
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        if (send_security_mode_command) {
            rrc_gNB_generate_SecurityModeCommand (&ctxt, ue_context_p);
            send_security_mode_command = FALSE;

            nr_rrc_pdcp_config_security(
                &ctxt,
                ue_context_p,
                send_security_mode_command);
        } else {
            /* rrc_gNB_generate_UECapabilityEnquiry */
            rrc_gNB_generate_UECapabilityEnquiry(&ctxt, ue_context_p);
        }
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    // in case, send the S1SP initial context response if it is not sent with the attach complete message
    if (ue_context_p->ue_context.Status == NR_RRC_RECONFIGURED) {
        LOG_I(NR_RRC, "Sending rrc_gNB_send_NGAP_INITIAL_CONTEXT_SETUP_RESP, cause %ld\n", ue_context_p->ue_context.reestablishment_cause);
        rrc_gNB_send_NGAP_INITIAL_CONTEXT_SETUP_RESP(&ctxt,ue_context_p);
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    }
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    return 0;
  }
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}
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//------------------------------------------------------------------------------
void
rrc_gNB_send_NGAP_INITIAL_CONTEXT_SETUP_RESP(
  const protocol_ctxt_t *const ctxt_pP,
  rrc_gNB_ue_context_t          *const ue_context_pP
)
//------------------------------------------------------------------------------
{
  MessageDef      *msg_p         = NULL;
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  int pdusession;
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  int e_rabs_done = 0;
  int e_rabs_failed = 0;
  msg_p = itti_alloc_new_message (TASK_RRC_ENB, NGAP_INITIAL_CONTEXT_SETUP_RESP);
  NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).gNB_ue_ngap_id = ue_context_pP->ue_context.gNB_ue_ngap_id;

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  for (pdusession = 0; pdusession < ue_context_pP->ue_context.nb_of_pdusessions; pdusession++) {
    if (ue_context_pP->ue_context.pdusession[pdusession].status == E_RAB_STATUS_DONE) {
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      e_rabs_done++;
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      NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions[pdusession].pdusession_id = ue_context_pP->ue_context.pdusession[pdusession].param.pdusession_id;
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      // TODO add other information from S1-U when it will be integrated
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      NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions[pdusession].gtp_teid = ue_context_pP->ue_context.gnb_gtp_teid[pdusession];
      memcpy(NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions[pdusession].gNB_addr.buffer , ue_context_pP->ue_context.gnb_gtp_addrs[pdusession].buffer, 20);
      NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions[pdusession].gNB_addr.length = 4;
      ue_context_pP->ue_context.pdusession[pdusession].status = E_RAB_STATUS_ESTABLISHED;
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    } else {
      e_rabs_failed++;
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      ue_context_pP->ue_context.pdusession[pdusession].status = E_RAB_STATUS_FAILED;
      NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).pdusessions_failed[pdusession].pdusession_id = ue_context_pP->ue_context.pdusession[pdusession].param.pdusession_id;
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      // TODO add cause when it will be integrated
    }
  }

  MSC_LOG_TX_MESSAGE(
    MSC_RRC_GNB,
    MSC_S1AP_ENB,
    (const char *)&NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p),
    sizeof(ngap_initial_context_setup_resp_t),
    MSC_AS_TIME_FMT" INITIAL_CONTEXT_SETUP_RESP UE %X eNB_ue_s1ap_id %u e_rabs:%u succ %u fail",
    MSC_AS_TIME_ARGS(ctxt_pP),
    ue_context_pP->ue_id_rnti,
    NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).gNB_ue_ngap_id,
    e_rabs_done, e_rabs_failed);
  NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).nb_of_pdusessions = e_rabs_done;
  NGAP_INITIAL_CONTEXT_SETUP_RESP (msg_p).nb_of_pdusessions_failed = e_rabs_failed;
  itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, msg_p);
}

static NR_CipheringAlgorithm_t rrc_gNB_select_ciphering(uint16_t algorithms) {
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  if (algorithms & NGAP_ENCRYPTION_NEA3_MASK) {
    return NR_CipheringAlgorithm_nea3;
  }

  if (algorithms & NGAP_ENCRYPTION_NEA2_MASK) {
    return NR_CipheringAlgorithm_nea2;
  }

  if (algorithms & NGAP_ENCRYPTION_NEA1_MASK) {
    return NR_CipheringAlgorithm_nea1;
  }

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  return NR_CipheringAlgorithm_nea0;
}

static e_NR_IntegrityProtAlgorithm rrc_gNB_select_integrity(uint16_t algorithms) {
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  if (algorithms & NGAP_INTEGRITY_NIA3_MASK) {
    return NR_IntegrityProtAlgorithm_nia3;
  }

  if (algorithms & NGAP_INTEGRITY_NIA2_MASK) {
    return NR_IntegrityProtAlgorithm_nia2;
  }

  if (algorithms & NGAP_INTEGRITY_NIA1_MASK) {
    return NR_IntegrityProtAlgorithm_nia1;
  }
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  return NR_IntegrityProtAlgorithm_nia0;
}

int
rrc_gNB_process_security(
  const protocol_ctxt_t *const ctxt_pP,
  rrc_gNB_ue_context_t *const ue_context_pP,
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  ngap_security_capabilities_t *security_capabilities_pP
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) {
  boolean_t                                             changed = FALSE;
  NR_CipheringAlgorithm_t                               cipheringAlgorithm;
  e_NR_IntegrityProtAlgorithm                           integrityProtAlgorithm;
  /* Save security parameters */
  ue_context_pP->ue_context.security_capabilities = *security_capabilities_pP;
  // translation
  LOG_D(NR_RRC,
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        "[gNB %d] NAS security_capabilities.encryption_algorithms %u AS ciphering_algorithm %lu NAS security_capabilities.integrity_algorithms %u AS integrity_algorithm %u\n",
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        ctxt_pP->module_id,
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        ue_context_pP->ue_context.security_capabilities.nRencryption_algorithms,
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        (unsigned long)ue_context_pP->ue_context.ciphering_algorithm,
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        ue_context_pP->ue_context.security_capabilities.nRintegrity_algorithms,
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        ue_context_pP->ue_context.integrity_algorithm);
  /* Select relevant algorithms */
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  cipheringAlgorithm = rrc_gNB_select_ciphering (ue_context_pP->ue_context.security_capabilities.nRencryption_algorithms);
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  if (ue_context_pP->ue_context.ciphering_algorithm != cipheringAlgorithm) {
    ue_context_pP->ue_context.ciphering_algorithm = cipheringAlgorithm;
    changed = TRUE;
  }

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  integrityProtAlgorithm = rrc_gNB_select_integrity (ue_context_pP->ue_context.security_capabilities.nRintegrity_algorithms);
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  if (ue_context_pP->ue_context.integrity_algorithm != integrityProtAlgorithm) {
    ue_context_pP->ue_context.integrity_algorithm = integrityProtAlgorithm;
    changed = TRUE;
  }

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  LOG_I (NR_RRC, "[gNB %d][UE %x] Selected security algorithms (%p): %lx, %x, %s\n",
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         ctxt_pP->module_id,
         ue_context_pP->ue_context.rnti,
         security_capabilities_pP,
         (unsigned long)cipheringAlgorithm,
         integrityProtAlgorithm,
         changed ? "changed" : "same");
  return changed;
}
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//------------------------------------------------------------------------------
int
rrc_gNB_process_NGAP_DOWNLINK_NAS(
  MessageDef *msg_p,
  const char *msg_name,
  instance_t  instance,
  mui_t      *rrc_gNB_mui
)
//------------------------------------------------------------------------------
{
    uint16_t ue_initial_id;
    uint32_t gNB_ue_ngap_id;
    uint32_t length;
    uint8_t *buffer;
    struct rrc_gNB_ue_context_s *ue_context_p = NULL;
    protocol_ctxt_t              ctxt;
    memset(&ctxt, 0, sizeof(protocol_ctxt_t));
    ue_initial_id  = NGAP_DOWNLINK_NAS (msg_p).ue_initial_id;
    gNB_ue_ngap_id = NGAP_DOWNLINK_NAS (msg_p).gNB_ue_ngap_id;
    ue_context_p = rrc_gNB_get_ue_context_from_ngap_ids(instance, ue_initial_id, gNB_ue_ngap_id);
    LOG_I(NR_RRC, "[gNB %d] Received %s: ue_initial_id %d, gNB_ue_ngap_id %d\n",
            instance,
            msg_name,
            ue_initial_id,
            gNB_ue_ngap_id);

    if (ue_context_p == NULL) {
        MSC_LOG_RX_MESSAGE(
            MSC_RRC_GNB,
            MSC_NGAP_GNB,
            NULL,
            0,
            MSC_AS_TIME_FMT" DOWNLINK-NAS UE initial id %u gNB_ue_ngap_id %u",
            0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
            ue_initial_id,
            gNB_ue_ngap_id);
        /* Can not associate this message to an UE index, send a failure to NGAP and discard it! */
        MessageDef *msg_fail_p;
        LOG_W(NR_RRC, "[gNB %d] In NGAP_DOWNLINK_NAS: unknown UE from NGAP ids (%d, %d)\n", instance, ue_initial_id, gNB_ue_ngap_id);
        msg_fail_p = itti_alloc_new_message (TASK_RRC_GNB, NGAP_NAS_NON_DELIVERY_IND);
        NGAP_NAS_NON_DELIVERY_IND (msg_fail_p).gNB_ue_ngap_id = gNB_ue_ngap_id;
        NGAP_NAS_NON_DELIVERY_IND (msg_fail_p).nas_pdu.length = NGAP_DOWNLINK_NAS (msg_p).nas_pdu.length;
        NGAP_NAS_NON_DELIVERY_IND (msg_fail_p).nas_pdu.buffer = NGAP_DOWNLINK_NAS (msg_p).nas_pdu.buffer;
        // TODO add failure cause when defined!
        MSC_LOG_TX_MESSAGE(
            MSC_RRC_ENB,
            MSC_NGAP_GNB,
            (const char *)NULL,
            0,
            MSC_AS_TIME_FMT" NGAP_NAS_NON_DELIVERY_IND UE initial id %u gNB_ue_ngap_id %u (ue ctxt !found)",
            0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
            ue_initial_id,
            gNB_ue_ngap_id);
        itti_send_msg_to_task (TASK_NGAP, instance, msg_fail_p);
        return (-1);
    } else {
        PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, GNB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);

        /* Is it the first income from NGAP ? */
        if (ue_context_p->ue_context.gNB_ue_ngap_id == 0) {
            ue_context_p->ue_context.gNB_ue_ngap_id = NGAP_DOWNLINK_NAS (msg_p).gNB_ue_ngap_id;
        }

        MSC_LOG_RX_MESSAGE(
            MSC_RRC_GNB,
            MSC_NGAP_GNB,
            (const char *)NULL,
            0,
            MSC_AS_TIME_FMT" DOWNLINK-NAS UE initial id %u gNB_ue_ngap_id %u",
            0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
            ue_initial_id,
            NGAP_DOWNLINK_NAS (msg_p).gNB_ue_ngap_id);
        /* Create message for PDCP (DLInformationTransfer_t) */
        length = do_NR_DLInformationTransfer (
                instance,
                &buffer,
                rrc_gNB_get_next_transaction_identifier (instance),
                NGAP_DOWNLINK_NAS (msg_p).nas_pdu.length,
                NGAP_DOWNLINK_NAS (msg_p).nas_pdu.buffer);
        LOG_DUMPMSG(NR_RRC, DEBUG_RRC, buffer, length, "[MSG] RRC DL Information Transfer\n");
        /*
        * switch UL or DL NAS message without RRC piggybacked to SRB2 if active.
        */
#ifdef ITTI_SIM
        MessageDef *message_p;
        uint8_t *message_buffer;
        message_buffer = itti_malloc (TASK_RRC_GNB_SIM, TASK_RRC_UE_SIM, length);
        memcpy (message_buffer, buffer, length);
        message_p = itti_alloc_new_message (TASK_RRC_GNB_SIM, GNB_RRC_DCCH_DATA_IND);
        GNB_RRC_DCCH_DATA_IND (message_p).rbid = DCCH;
        GNB_RRC_DCCH_DATA_IND (message_p).sdu = message_buffer;
        GNB_RRC_DCCH_DATA_IND (message_p).size  = length;
        itti_send_msg_to_task (TASK_RRC_UE_SIM, instance, message_p);
        LOG_I(NR_RRC, "Send DL NAS message \n");
#else
        /* Transfer data to PDCP */
        nr_rrc_data_req (
            &ctxt,
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            DCCH,//ue_context_p->ue_context.Srb2.Srb_info.Srb_id,
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            (*rrc_gNB_mui)++,
            SDU_CONFIRM_NO,
            length,
            buffer,
            PDCP_TRANSMISSION_MODE_CONTROL);
#endif
        return (0);
    }
}

//------------------------------------------------------------------------------
void
rrc_gNB_send_NGAP_UPLINK_NAS(
  const protocol_ctxt_t    *const ctxt_pP,
  rrc_gNB_ue_context_t     *const ue_context_pP,
  NR_UL_DCCH_Message_t     *const ul_dcch_msg
)
//------------------------------------------------------------------------------
{
    uint32_t pdu_length;
    uint8_t *pdu_buffer;
    MessageDef *msg_p;
    NR_ULInformationTransfer_t *ulInformationTransfer = ul_dcch_msg->message.choice.c1->choice.ulInformationTransfer;

    if (ulInformationTransfer->criticalExtensions.present == NR_ULInformationTransfer__criticalExtensions_PR_ulInformationTransfer) {
        pdu_length = ulInformationTransfer->criticalExtensions.choice.ulInformationTransfer->dedicatedNAS_Message->size;
        pdu_buffer = ulInformationTransfer->criticalExtensions.choice.ulInformationTransfer->dedicatedNAS_Message->buf;
        msg_p = itti_alloc_new_message (TASK_RRC_GNB, NGAP_UPLINK_NAS);
        NGAP_UPLINK_NAS (msg_p).gNB_ue_ngap_id = ue_context_pP->ue_context.gNB_ue_ngap_id;
        NGAP_UPLINK_NAS (msg_p).nas_pdu.length = pdu_length;
        NGAP_UPLINK_NAS (msg_p).nas_pdu.buffer = pdu_buffer;
        // extract_imsi(NGAP_UPLINK_NAS (msg_p).nas_pdu.buffer,
        //               NGAP_UPLINK_NAS (msg_p).nas_pdu.length,
        //               ue_context_pP);
        itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, msg_p);
        LOG_I(NR_RRC,"Send RRC GNB UL Information Transfer \n");
    }
}

//------------------------------------------------------------------------------
void
rrc_gNB_send_NGAP_PDUSESSION_SETUP_RESP(
  const protocol_ctxt_t    *const ctxt_pP,
  rrc_gNB_ue_context_t     *const ue_context_pP,
  uint8_t                   xid
)
//------------------------------------------------------------------------------
{
  MessageDef *msg_p;
  int pdu_sessions_done = 0;
  int pdu_sessions_failed = 0;
  int pdusession;
  int qos_flow_index;

  msg_p = itti_alloc_new_message (TASK_RRC_GNB, NGAP_PDUSESSION_SETUP_RESP);
  NGAP_PDUSESSION_SETUP_RESP(msg_p).gNB_ue_ngap_id = ue_context_pP->ue_context.gNB_ue_ngap_id;

  for (pdusession = 0; pdusession < ue_context_pP->ue_context.setup_pdu_sessions; pdusession++) {
    // if (xid == ue_context_pP->ue_context.pdusession[pdusession].xid) {
      if (ue_context_pP->ue_context.pdusession[pdusession].status == PDU_SESSION_STATUS_DONE) {
        NGAP_PDUSESSION_SETUP_RESP(msg_p).pdusessions[pdusession].pdusession_id = ue_context_pP->ue_context.pdusession[pdusession].param.pdusession_id;
        // NGAP_PDUSESSION_SETUP_RESP(msg_p).pdusessions[pdusession].pdusession_id = 1;
        NGAP_PDUSESSION_SETUP_RESP(msg_p).pdusessions[pdusession].nb_of_qos_flow = ue_context_pP->ue_context.pdusession[pdusession].param.nb_qos;
        NGAP_PDUSESSION_SETUP_RESP(msg_p).pdusessions[pdusession].gtp_teid = ue_context_pP->ue_context.gnb_gtp_teid[pdusession];
        NGAP_PDUSESSION_SETUP_RESP(msg_p).pdusessions[pdusession].gNB_addr.pdu_session_type = PDUSessionType_ipv4;
        NGAP_PDUSESSION_SETUP_RESP(msg_p).pdusessions[pdusession].gNB_addr.length = ue_context_pP->ue_context.gnb_gtp_addrs[pdusession].length;
        memcpy(NGAP_PDUSESSION_SETUP_RESP(msg_p).pdusessions[pdusession].gNB_addr.buffer,
                ue_context_pP->ue_context.gnb_gtp_addrs[pdusession].buffer, sizeof(uint8_t)*20);
        for (qos_flow_index = 0; qos_flow_index < NGAP_PDUSESSION_SETUP_RESP(msg_p).pdusessions[pdusession].nb_of_qos_flow; qos_flow_index++) {
          NGAP_PDUSESSION_SETUP_RESP(msg_p).pdusessions[pdusession].associated_qos_flows[qos_flow_index].qfi =
            ue_context_pP->ue_context.pdusession[pdusession].param.qos[qos_flow_index].qfi;
          NGAP_PDUSESSION_SETUP_RESP(msg_p).pdusessions[pdusession].associated_qos_flows[qos_flow_index].qos_flow_mapping_ind = QOSFLOW_MAPPING_INDICATION_DL;
        }

        ue_context_pP->ue_context.pdusession[pdusession].status = PDU_SESSION_STATUS_ESTABLISHED;
        LOG_I (NR_RRC,"gnb_gtp_addr (msg index %d, pdu_sessions index %d, status %d, xid %d): nb_of_pdusessions %d,  pdusession_id %d, teid: %u, addr: %d.%d.%d.%d \n ",
               pdu_sessions_done, pdusession, ue_context_pP->ue_context.pdusession[pdusession].status, xid,
               ue_context_pP->ue_context.nb_of_pdusessions,
               NGAP_PDUSESSION_SETUP_RESP (msg_p).pdusessions[pdu_sessions_done].pdusession_id,
               NGAP_PDUSESSION_SETUP_RESP (msg_p).pdusessions[pdu_sessions_done].gtp_teid,
               NGAP_PDUSESSION_SETUP_RESP (msg_p).pdusessions[pdu_sessions_done].gNB_addr.buffer[0],
               NGAP_PDUSESSION_SETUP_RESP (msg_p).pdusessions[pdu_sessions_done].gNB_addr.buffer[1],
               NGAP_PDUSESSION_SETUP_RESP (msg_p).pdusessions[pdu_sessions_done].gNB_addr.buffer[2],
               NGAP_PDUSESSION_SETUP_RESP (msg_p).pdusessions[pdu_sessions_done].gNB_addr.buffer[3]);
        pdu_sessions_done++;
      } else if ((ue_context_pP->ue_context.pdusession[pdusession].status == PDU_SESSION_STATUS_NEW) ||
                 (ue_context_pP->ue_context.pdusession[pdusession].status == PDU_SESSION_STATUS_ESTABLISHED)) {
        LOG_D (NR_RRC,"PDU-SESSION is NEW or already ESTABLISHED\n");
      } else { /* to be improved */
        ue_context_pP->ue_context.pdusession[pdusession].status = PDU_SESSION_STATUS_FAILED;
        NGAP_PDUSESSION_SETUP_RESP (msg_p).pdusessions_failed[pdu_sessions_failed].pdusession_id = ue_context_pP->ue_context.pdusession[pdusession].param.pdusession_id;
        pdu_sessions_failed++;
        // TODO add cause when it will be integrated
      }
        NGAP_PDUSESSION_SETUP_RESP(msg_p).nb_of_pdusessions = pdu_sessions_done;
        NGAP_PDUSESSION_SETUP_RESP(msg_p).nb_of_pdusessions_failed = pdu_sessions_failed;
    // } else {
    //   LOG_D(NR_RRC,"xid does not corresponds  (context pdu_sessions index %d, status %d, xid %d/%d) \n ",
    //         pdusession, ue_context_pP->ue_context.pdusession[pdusession].status, xid, ue_context_pP->ue_context.pdusession[pdusession].xid);
    // }
  }

  if ((pdu_sessions_done > 0) ) {
    LOG_I(NR_RRC,"NGAP_PDUSESSION_SETUP_RESP: sending the message: nb_of_pdusessions %d, total pdu_sessions %d, index %d\n",
          ue_context_pP->ue_context.nb_of_pdusessions, ue_context_pP->ue_context.setup_pdu_sessions, pdusession);
    MSC_LOG_TX_MESSAGE(
      MSC_RRC_GNB,
      MSC_NGAP_GNB,
      (const char *)&NGAP_PDUSESSION_SETUP_RESP (msg_p),
      sizeof(ngap_pdusession_setup_resp_t),
      MSC_AS_TIME_FMT" PDUSESSION_SETUP_RESP UE %X gNB_ue_ngap_id %u pdu_sessions:%u succ %u fail",
      MSC_AS_TIME_ARGS(ctxt_pP),
      ue_context_pP->ue_id_rnti,
      NGAP_PDUSESSION_SETUP_RESP (msg_p).gNB_ue_ngap_id,
      pdu_sessions_done, pdu_sessions_failed);
    itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, msg_p);
  }

  for(int i = 0; i < NB_RB_MAX; i++) {
    ue_context_pP->ue_context.pdusession[i].xid = -1;
  }

  return;
}

//------------------------------------------------------------------------------
int
rrc_gNB_process_NGAP_PDUSESSION_SETUP_REQ(
  MessageDef *msg_p,
  const char *msg_name,
  instance_t instance
)
//------------------------------------------------------------------------------
{
  uint16_t                        ue_initial_id;
  uint32_t                        gNB_ue_ngap_id;
  rrc_gNB_ue_context_t            *ue_context_p = NULL;
  protocol_ctxt_t                 ctxt;
  gtpv1u_gnb_create_tunnel_req_t  create_tunnel_req;
  gtpv1u_gnb_create_tunnel_resp_t create_tunnel_resp;
  uint8_t                         pdu_sessions_done;
  uint8_t                         inde_list[NR_NB_RB_MAX - 3]= {0};
  int                             ret = 0;

  ue_initial_id  = NGAP_PDUSESSION_SETUP_REQ(msg_p).ue_initial_id;
  gNB_ue_ngap_id = NGAP_PDUSESSION_SETUP_REQ(msg_p).gNB_ue_ngap_id;
  ue_context_p   = rrc_gNB_get_ue_context_from_ngap_ids(instance, ue_initial_id, gNB_ue_ngap_id);
  LOG_I(NR_RRC, "[gNB %d] Received %s: ue_initial_id %d, gNB_ue_ngap_id %d \n",
    instance, msg_name, ue_initial_id, gNB_ue_ngap_id);

  if (ue_context_p == NULL) {
    MessageDef *msg_fail_p = NULL;
    LOG_W(NR_RRC, "[gNB %d] In NGAP_PDUSESSION_SETUP_REQ: unknown UE from NGAP ids (%d, %d)\n", instance, ue_initial_id, gNB_ue_ngap_id);
    msg_fail_p = itti_alloc_new_message(TASK_RRC_GNB, NGAP_PDUSESSION_SETUP_REQUEST_FAIL);
    NGAP_PDUSESSION_SETUP_REQ(msg_fail_p).gNB_ue_ngap_id = gNB_ue_ngap_id;
    // TODO add failure cause when defined!
    itti_send_msg_to_task (TASK_NGAP, instance, msg_fail_p);
    return (-1);
  } else {
    memset(&create_tunnel_req, 0, sizeof(gtpv1u_gnb_create_tunnel_req_t));
    uint8_t nb_pdusessions_tosetup = NGAP_PDUSESSION_SETUP_REQ(msg_p).nb_pdusessions_tosetup;
    pdu_sessions_done = 0;

    PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, GNB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
    for (int i = 0; i < NR_NB_RB_MAX - 3; i++) {
      if(ue_context_p->ue_context.pdusession[i].status >= PDU_SESSION_STATUS_DONE)
        continue;
      ue_context_p->ue_context.pdusession[i].status      = PDU_SESSION_STATUS_NEW;
      ue_context_p->ue_context.pdusession[i].param       = NGAP_PDUSESSION_SETUP_REQ(msg_p).pdusession_setup_params[pdu_sessions_done];
      create_tunnel_req.pdusession_id[pdu_sessions_done] = NGAP_PDUSESSION_SETUP_REQ(msg_p).pdusession_setup_params[pdu_sessions_done].pdusession_id;
      create_tunnel_req.upf_NGu_teid[pdu_sessions_done]  = NGAP_PDUSESSION_SETUP_REQ(msg_p).pdusession_setup_params[pdu_sessions_done].gtp_teid;
975
      printf("----------------liuyu--------------teid from amf %x\n----------",NGAP_PDUSESSION_SETUP_REQ(msg_p).pdusession_setup_params[pdu_sessions_done].gtp_teid);
976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997
      memcpy(create_tunnel_req.upf_addr[pdu_sessions_done].buffer,
              NGAP_PDUSESSION_SETUP_REQ(msg_p).pdusession_setup_params[i].upf_addr.buffer,
              sizeof(uint8_t)*20);
      create_tunnel_req.upf_addr[pdu_sessions_done].length = NGAP_PDUSESSION_SETUP_REQ(msg_p).pdusession_setup_params[i].upf_addr.length;
      LOG_I(NR_RRC,"NGAP PDUSESSION SETUP REQ: local index %d teid %u, pdusession id %d \n",
            i,
            create_tunnel_req.upf_NGu_teid[i],
            create_tunnel_req.pdusession_id[i]);
      inde_list[pdu_sessions_done] = i;
      pdu_sessions_done++;

      if(pdu_sessions_done >= nb_pdusessions_tosetup) {
        break;
      }
    }

    ue_context_p->ue_context.nb_of_pdusessions = NGAP_PDUSESSION_SETUP_REQ(msg_p).nb_pdusessions_tosetup;
    ue_context_p->ue_context.gNB_ue_ngap_id    = NGAP_PDUSESSION_SETUP_REQ(msg_p).gNB_ue_ngap_id;
    ue_context_p->ue_context.amf_ue_ngap_id    = NGAP_PDUSESSION_SETUP_REQ(msg_p).amf_ue_ngap_id;
    create_tunnel_req.rnti                     = ue_context_p->ue_context.rnti;
    create_tunnel_req.num_tunnels              = pdu_sessions_done;

998 999 1000 1001 1002
    //ret = gtpv1u_create_ngu_tunnel(
     //       instance,
    //        &create_tunnel_req,
    //        &create_tunnel_resp);
    ret = 0;
1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013
    if (ret != 0) {
      LOG_E(NR_RRC,"rrc_gNB_process_NGAP_PDUSESSION_SETUP_REQ : gtpv1u_create_ngu_tunnel failed,start to release UE %x\n",ue_context_p->ue_context.rnti);
      ue_context_p->ue_context.ue_release_timer_ng = 1;
      ue_context_p->ue_context.ue_release_timer_thres_ng = 100;
      ue_context_p->ue_context.ue_release_timer = 0;
      ue_context_p->ue_context.ue_reestablishment_timer = 0;
      ue_context_p->ue_context.ul_failure_timer = 20000; // set ul_failure to 20000 for triggering rrc_eNB_send_S1AP_UE_CONTEXT_RELEASE_REQ
      // rrc_gNB_free_UE(ctxt.module_id,ue_context_p);
      ue_context_p->ue_context.ul_failure_timer = 0;
      return (0);
    }
1014 1015 1016 1017
    //nr_rrc_gNB_process_GTPV1U_CREATE_TUNNEL_RESP(
    //  &ctxt,
    //  &create_tunnel_resp,
    //  &inde_list[0]);
1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234
    ue_context_p->ue_context.setup_pdu_sessions += nb_pdusessions_tosetup;

    // TEST 
    ue_context_p->ue_context.pdusession[0].status = PDU_SESSION_STATUS_DONE;
    rrc_gNB_send_NGAP_PDUSESSION_SETUP_RESP(&ctxt, ue_context_p, 0);
    return(0);
  }
}

void
rrc_gNB_send_NGAP_UE_CONTEXT_RELEASE_REQ(
  const module_id_t gnb_mod_idP,
  const rrc_gNB_ue_context_t *const ue_context_pP,
  const ngap_Cause_t causeP,
  const long cause_valueP)
//------------------------------------------------------------------------------
{
  if (ue_context_pP == NULL) {
    LOG_E(RRC, "[gNB] In NGAP_UE_CONTEXT_RELEASE_REQ: invalid UE\n");
  } else {
    MSC_LOG_TX_MESSAGE(MSC_RRC_GNB,
                       MSC_NGAP_GNB,
                       NULL,
                       0,
                       "0 NGAP_UE_CONTEXT_RELEASE_REQ gNB_ue_ngap_id 0x%06"PRIX32" ",
                       ue_context_pP->ue_context.gNB_ue_ngap_id);
    MessageDef *msg_context_release_req_p = NULL;
    msg_context_release_req_p = itti_alloc_new_message(TASK_RRC_GNB, NGAP_UE_CONTEXT_RELEASE_REQ);
    NGAP_UE_CONTEXT_RELEASE_REQ(msg_context_release_req_p).gNB_ue_ngap_id    = ue_context_pP->ue_context.gNB_ue_ngap_id;
    NGAP_UE_CONTEXT_RELEASE_REQ(msg_context_release_req_p).cause             = causeP;
    NGAP_UE_CONTEXT_RELEASE_REQ(msg_context_release_req_p).cause_value       = cause_valueP;
    NGAP_UE_CONTEXT_RELEASE_REQ(msg_context_release_req_p).nb_of_pdusessions = ue_context_pP->ue_context.setup_pdu_sessions;
    for (int pdusession = 0; pdusession < ue_context_pP->ue_context.setup_pdu_sessions; pdusession++) {
      NGAP_UE_CONTEXT_RELEASE_REQ(msg_context_release_req_p).pdusessions[pdusession].pdusession_id = ue_context_pP->ue_context.pdusession[pdusession].param.pdusession_id;
    }
    itti_send_msg_to_task(TASK_NGAP, GNB_MODULE_ID_TO_INSTANCE(gnb_mod_idP), msg_context_release_req_p);
  }
}
/*------------------------------------------------------------------------------*/
int 
rrc_gNB_process_NGAP_UE_CONTEXT_RELEASE_REQ (
  MessageDef *msg_p, 
  const char *msg_name, 
  instance_t instance) 
{
  uint32_t gNB_ue_ngap_id;
  struct rrc_gNB_ue_context_s *ue_context_p = NULL;
  gNB_ue_ngap_id = NGAP_UE_CONTEXT_RELEASE_REQ(msg_p).gNB_ue_ngap_id;
  ue_context_p   = rrc_gNB_get_ue_context_from_ngap_ids(instance, UE_INITIAL_ID_INVALID, gNB_ue_ngap_id);

  if (ue_context_p == NULL) {
    /* Can not associate this message to an UE index, send a failure to ngAP and discard it! */
    MessageDef *msg_fail_p;
    LOG_W(RRC, "[gNB %d] In NGAP_UE_CONTEXT_RELEASE_REQ: unknown UE from gNB_ue_ngap_id (%d)\n",
          instance,
          gNB_ue_ngap_id);
    msg_fail_p = itti_alloc_new_message(TASK_RRC_GNB, NGAP_UE_CONTEXT_RELEASE_RESP); /* TODO change message ID. */
    NGAP_UE_CONTEXT_RELEASE_RESP(msg_fail_p).gNB_ue_ngap_id = gNB_ue_ngap_id;
    // TODO add failure cause when defined!
    itti_send_msg_to_task(TASK_NGAP, instance, msg_fail_p);
    return (-1);
  } else {
    /* TODO release context. */
    /* Send the response */
    {
      MessageDef *msg_resp_p;
      msg_resp_p = itti_alloc_new_message(TASK_RRC_GNB, NGAP_UE_CONTEXT_RELEASE_RESP);
      NGAP_UE_CONTEXT_RELEASE_RESP(msg_resp_p).gNB_ue_ngap_id = gNB_ue_ngap_id;
      itti_send_msg_to_task(TASK_NGAP, instance, msg_resp_p);
    }
    return (0);
  }
}

//-----------------------------------------------------------------------------
/*
* Process the NG command NGAP_UE_CONTEXT_RELEASE_COMMAND, sent by AMF.
* The gNB should remove all pdu session, NG context, and other context of the UE.
*/
int
rrc_gNB_process_NGAP_UE_CONTEXT_RELEASE_COMMAND(
  MessageDef *msg_p,
  const char *msg_name,
  instance_t instance) {
  //-----------------------------------------------------------------------------
  uint32_t gNB_ue_ngap_id = 0;
  protocol_ctxt_t ctxt;
  struct rrc_gNB_ue_context_s *ue_context_p = NULL;
  struct rrc_ue_ngap_ids_s *rrc_ue_ngap_ids = NULL;
  gNB_ue_ngap_id = NGAP_UE_CONTEXT_RELEASE_COMMAND(msg_p).gNB_ue_ngap_id;
  ue_context_p = rrc_gNB_get_ue_context_from_ngap_ids(instance, UE_INITIAL_ID_INVALID, gNB_ue_ngap_id);

  if (ue_context_p == NULL) {
    /* Can not associate this message to an UE index */
    MessageDef *msg_complete_p = NULL;
    LOG_W(RRC, "[gNB %d] In NGAP_UE_CONTEXT_RELEASE_COMMAND: unknown UE from gNB_ue_ngap_id (%d)\n",
          instance,
          gNB_ue_ngap_id);
    MSC_LOG_EVENT(MSC_RRC_GNB, "0 NGAP_UE_CONTEXT_RELEASE_COMPLETE gNB_ue_ngap_id 0x%06"PRIX32" context not found",
                  gNB_ue_ngap_id);
    MSC_LOG_TX_MESSAGE(MSC_RRC_GNB,
                       MSC_NGAP_GNB,
                       NULL,
                       0,
                       "0 NGAP_UE_CONTEXT_RELEASE_COMPLETE gNB_ue_ngap_id 0x%06"PRIX32" ",
                       gNB_ue_ngap_id);
    msg_complete_p = itti_alloc_new_message(TASK_RRC_GNB, NGAP_UE_CONTEXT_RELEASE_COMPLETE);
    NGAP_UE_CONTEXT_RELEASE_COMPLETE(msg_complete_p).gNB_ue_ngap_id = gNB_ue_ngap_id;
    itti_send_msg_to_task(TASK_NGAP, instance, msg_complete_p);
    rrc_ue_ngap_ids = rrc_gNB_NGAP_get_ue_ids(RC.nrrrc[instance], UE_INITIAL_ID_INVALID, gNB_ue_ngap_id);

    if (rrc_ue_ngap_ids != NULL) {
      rrc_gNB_NGAP_remove_ue_ids(RC.nrrrc[instance], rrc_ue_ngap_ids);
    }

    return -1;
  } else {
    ue_context_p->ue_context.ue_release_timer_ng = 0;
    PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, GNB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
    rrc_gNB_generate_RRCRelease(&ctxt, ue_context_p);
    return 0;
  }
}
//------------------------------------------------------------------------------
/*
* Remove UE ids (ue_initial_id and ng_id) from hashtables.
*/
void
rrc_gNB_NGAP_remove_ue_ids(
  gNB_RRC_INST *const rrc_instance_pP,
  struct rrc_ue_ngap_ids_s *const ue_ids_pP
)
//------------------------------------------------------------------------------
{
  hashtable_rc_t h_rc;

  if (rrc_instance_pP == NULL) {
    LOG_E(NR_RRC, "Bad NR RRC instance\n");
    return;
  }

  if (ue_ids_pP == NULL) {
    LOG_E(NR_RRC, "Trying to free a NULL NGAP UE IDs\n");
    return;
  }

  const uint16_t ue_initial_id  = ue_ids_pP->ue_initial_id;
  const uint32_t gNB_ue_ngap_id = ue_ids_pP->gNB_ue_ngap_id;

  if (gNB_ue_ngap_id > 0) {
    h_rc = hashtable_remove(rrc_instance_pP->ngap_id2_ngap_ids, (hash_key_t)gNB_ue_ngap_id);

    if (h_rc != HASH_TABLE_OK) {
      LOG_W(NR_RRC, "NGAP Did not find entry in hashtable ngap_id2_ngap_ids for gNB_ue_ngap_id %u\n", gNB_ue_ngap_id);
    } else {
      LOG_W(NR_RRC, "NGAP removed entry in hashtable ngap_id2_ngap_ids for gNB_ue_ngap_id %u\n", gNB_ue_ngap_id);
    }
  }

  if (ue_initial_id != UE_INITIAL_ID_INVALID) {
    h_rc = hashtable_remove(rrc_instance_pP->initial_id2_ngap_ids, (hash_key_t)ue_initial_id);

    if (h_rc != HASH_TABLE_OK) {
      LOG_W(NR_RRC, "NGAP Did not find entry in hashtable initial_id2_ngap_ids for ue_initial_id %u\n", ue_initial_id);
    } else {
      LOG_W(NR_RRC, "NGAP removed entry in hashtable initial_id2_ngap_ids for ue_initial_id %u\n", ue_initial_id);
    }
  }
}
void
rrc_gNB_send_NGAP_UE_CAPABILITIES_IND(
  const protocol_ctxt_t    *const ctxt_pP,
  rrc_gNB_ue_context_t     *const ue_context_pP,
  NR_UL_DCCH_Message_t     *const ul_dcch_msg
)
//------------------------------------------------------------------------------
{
    NR_UE_CapabilityRAT_ContainerList_t *ueCapabilityRATContainerList = ul_dcch_msg->message.choice.c1->choice.ueCapabilityInformation->criticalExtensions.choice.ueCapabilityInformation->ue_CapabilityRAT_ContainerList;
    /* 4096 is arbitrary, should be big enough */
    unsigned char buf[4096];
    unsigned char *buf2;
    NR_UERadioAccessCapabilityInformation_t rac;
    
    if (ueCapabilityRATContainerList->list.count == 0) {
      LOG_W(RRC, "[gNB %d][UE %x] bad UE capabilities\n", ctxt_pP->module_id, ue_context_pP->ue_context.rnti);
    }
    
    asn_enc_rval_t ret = uper_encode_to_buffer(&asn_DEF_NR_UE_CapabilityRAT_ContainerList, NULL, ueCapabilityRATContainerList, buf, 4096);
    
    if (ret.encoded == -1) abort();
    
    memset(&rac, 0, sizeof(NR_UERadioAccessCapabilityInformation_t));
    rac.criticalExtensions.present = NR_UERadioAccessCapabilityInformation__criticalExtensions_PR_c1;
    rac.criticalExtensions.choice.c1 = calloc(1,sizeof(*rac.criticalExtensions.choice.c1));
    rac.criticalExtensions.choice.c1->present = NR_UERadioAccessCapabilityInformation__criticalExtensions__c1_PR_ueRadioAccessCapabilityInformation;
    rac.criticalExtensions.choice.c1->choice.ueRadioAccessCapabilityInformation = calloc(1,sizeof(NR_UERadioAccessCapabilityInformation_IEs_t));
    rac.criticalExtensions.choice.c1->choice.ueRadioAccessCapabilityInformation->ue_RadioAccessCapabilityInfo.buf = buf;
    rac.criticalExtensions.choice.c1->choice.ueRadioAccessCapabilityInformation->ue_RadioAccessCapabilityInfo.size = (ret.encoded+7)/8;
    rac.criticalExtensions.choice.c1->choice.ueRadioAccessCapabilityInformation->nonCriticalExtension = NULL;
    /* 8192 is arbitrary, should be big enough */
    buf2 = malloc16(8192);
    
    if (buf2 == NULL) abort();
    
    ret = uper_encode_to_buffer(&asn_DEF_NR_UERadioAccessCapabilityInformation, NULL, &rac, buf2, 8192);
    
    if (ret.encoded == -1) abort();

    MessageDef *msg_p;
    msg_p = itti_alloc_new_message (TASK_RRC_GNB, NGAP_UE_CAPABILITIES_IND);
    NGAP_UE_CAPABILITIES_IND (msg_p).gNB_ue_ngap_id = ue_context_pP->ue_context.gNB_ue_ngap_id;
    NGAP_UE_CAPABILITIES_IND (msg_p).ue_radio_cap.length = (ret.encoded+7)/8;
    NGAP_UE_CAPABILITIES_IND (msg_p).ue_radio_cap.buffer = buf2;
    itti_send_msg_to_task (TASK_NGAP, ctxt_pP->instance, msg_p);
    LOG_I(NR_RRC,"Send message to ngap: NGAP_UE_CAPABILITIES_IND\n");
}