s1ap_eNB_nas_procedures.c 68.2 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
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 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
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 * 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 s1ap_eNB_nas_procedures.c
 * \brief S1AP eNb NAS procedure handler
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 * \author  S. Roux and Navid Nikaein
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 * \date 2010 - 2015
 * \email: navid.nikaein@eurecom.fr
 * \version 1.0
 * @ingroup _s1ap
 */
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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

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#include "assertions.h"
#include "conversions.h"

#include "intertask_interface.h"
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#include "s1ap_common.h"
#include "s1ap_eNB_defs.h"

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#include "s1ap_eNB_itti_messaging.h"

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#include "s1ap_eNB_encoder.h"
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#include "s1ap_eNB_nnsf.h"
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#include "s1ap_eNB_ue_context.h"
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#include "s1ap_eNB_nas_procedures.h"
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#include "s1ap_eNB_management_procedures.h"
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#include "msc.h"
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//------------------------------------------------------------------------------
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int s1ap_eNB_handle_nas_first_req(
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  instance_t instance, s1ap_nas_first_req_t *s1ap_nas_first_req_p)
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//------------------------------------------------------------------------------
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{
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  s1ap_eNB_instance_t          *instance_p = NULL;
  struct s1ap_eNB_mme_data_s   *mme_desc_p = NULL;
  struct s1ap_eNB_ue_context_s *ue_desc_p  = NULL;
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  S1AP_S1AP_PDU_t               pdu;
  S1AP_InitialUEMessage_t      *out;
  S1AP_InitialUEMessage_IEs_t  *ie;
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  uint8_t  *buffer = NULL;
  uint32_t  length = 0;
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  DevAssert(s1ap_nas_first_req_p != NULL);
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  /* Retrieve the S1AP eNB instance associated with Mod_id */
  instance_p = s1ap_eNB_get_instance(instance);
  DevAssert(instance_p != NULL);
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  memset(&pdu, 0, sizeof(pdu));
  pdu.present = S1AP_S1AP_PDU_PR_initiatingMessage;
  pdu.choice.initiatingMessage.procedureCode = S1AP_ProcedureCode_id_initialUEMessage;
  pdu.choice.initiatingMessage.criticality = S1AP_Criticality_ignore;
  pdu.choice.initiatingMessage.value.present = S1AP_InitiatingMessage__value_PR_InitialUEMessage;
  out = &pdu.choice.initiatingMessage.value.choice.InitialUEMessage;
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  /* Select the MME corresponding to the provided GUMMEI. */
  if (s1ap_nas_first_req_p->ue_identity.presenceMask & UE_IDENTITIES_gummei) {
    mme_desc_p = s1ap_eNB_nnsf_select_mme_by_gummei(
                   instance_p,
                   s1ap_nas_first_req_p->establishment_cause,
                   s1ap_nas_first_req_p->ue_identity.gummei);
  }
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  if (mme_desc_p == NULL) {
    /* Select the MME corresponding to the provided s-TMSI. */
    if (s1ap_nas_first_req_p->ue_identity.presenceMask & UE_IDENTITIES_s_tmsi) {
      mme_desc_p = s1ap_eNB_nnsf_select_mme_by_mme_code(
                     instance_p,
                     s1ap_nas_first_req_p->establishment_cause,
                     s1ap_nas_first_req_p->ue_identity.s_tmsi.mme_code);
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    }
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  }
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  if (mme_desc_p == NULL) {
    /*
     * If no MME corresponds to the GUMMEI or the s-TMSI, selects the MME with the
     * highest capacity.
     */
    mme_desc_p = s1ap_eNB_nnsf_select_mme(
                   instance_p,
                   s1ap_nas_first_req_p->establishment_cause);
  }

  if (mme_desc_p == NULL) {
    /*
     * In case eNB has no MME associated, the eNB should inform RRC and discard
     * this request.
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     */

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    S1AP_WARN("No MME is associated to the eNB\n");
    // TODO: Inform RRC
    return -1;
  }

  /* The eNB should allocate a unique eNB UE S1AP ID for this UE. The value
   * will be used for the duration of the connectivity.
   */
  ue_desc_p = s1ap_eNB_allocate_new_UE_context();
  DevAssert(ue_desc_p != NULL);

  /* Keep a reference to the selected MME */
  ue_desc_p->mme_ref       = mme_desc_p;
  ue_desc_p->ue_initial_id = s1ap_nas_first_req_p->ue_initial_id;
  ue_desc_p->eNB_instance  = instance_p;

  do {
    struct s1ap_eNB_ue_context_s *collision_p;

    /* Peek a random value for the eNB_ue_s1ap_id */
    ue_desc_p->eNB_ue_s1ap_id = (random() + random()) & 0x00ffffff;

    if ((collision_p = RB_INSERT(s1ap_ue_map, &instance_p->s1ap_ue_head, ue_desc_p))
        == NULL) {
      S1AP_DEBUG("Found usable eNB_ue_s1ap_id: 0x%06x %d(10)\n",
                 ue_desc_p->eNB_ue_s1ap_id,
                 ue_desc_p->eNB_ue_s1ap_id);
      /* Break the loop as the id is not already used by another UE */
      break;
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    }
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  } while(1);
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  /* mandatory */
  ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_reject;
  ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_ENB_UE_S1AP_ID;
  ie->value.choice.ENB_UE_S1AP_ID = ue_desc_p->eNB_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_NAS_PDU;
  ie->criticality = S1AP_Criticality_reject;
  ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_NAS_PDU;
#if 1
  ie->value.choice.NAS_PDU.buf = s1ap_nas_first_req_p->nas_pdu.buffer;
#else
  ie->value.choice.NAS_PDU.buf = malloc(s1ap_nas_first_req_p->nas_pdu.length);
  memcpy(ie->value.choice.NAS_PDU.buf,
         s1ap_nas_first_req_p->nas_pdu.buffer,
         s1ap_nas_first_req_p->nas_pdu.length);
#endif
  ie->value.choice.NAS_PDU.size = s1ap_nas_first_req_p->nas_pdu.length;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_TAI;
  ie->criticality = S1AP_Criticality_reject;
  ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_TAI;
  /* Assuming TAI is the TAI from the cell */
  INT16_TO_OCTET_STRING(instance_p->tac, &ie->value.choice.TAI.tAC);
  MCC_MNC_TO_PLMNID(instance_p->mcc,
                    instance_p->mnc,
                    instance_p->mnc_digit_length,
                    &ie->value.choice.TAI.pLMNidentity);
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_EUTRAN_CGI;
  ie->criticality = S1AP_Criticality_ignore;
  ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_EUTRAN_CGI;
  /* Set the EUTRAN CGI
   * The cell identity is defined on 28 bits but as we use macro enb id,
   * we have to pad.
   */
  //#warning "TODO get cell id from RRC"
  MACRO_ENB_ID_TO_CELL_IDENTITY(instance_p->eNB_id,
                                0, // Cell ID
                                &ie->value.choice.EUTRAN_CGI.cell_ID);
  MCC_MNC_TO_TBCD(instance_p->mcc,
                  instance_p->mnc,
                  instance_p->mnc_digit_length,
                  &ie->value.choice.EUTRAN_CGI.pLMNidentity);
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
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  /* Set the establishment cause according to those provided by RRC */
  DevCheck(s1ap_nas_first_req_p->establishment_cause < RRC_CAUSE_LAST,
           s1ap_nas_first_req_p->establishment_cause, RRC_CAUSE_LAST, 0);
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  /* mandatory */
  ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_RRC_Establishment_Cause;
  ie->criticality = S1AP_Criticality_ignore;
  ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_RRC_Establishment_Cause;
  ie->value.choice.RRC_Establishment_Cause = s1ap_nas_first_req_p->establishment_cause;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* optional */
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  if (s1ap_nas_first_req_p->ue_identity.presenceMask & UE_IDENTITIES_s_tmsi) {
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    S1AP_DEBUG("S_TMSI_PRESENT\n");
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    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_S_TMSI;
    ie->criticality = S1AP_Criticality_reject;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_S_TMSI;
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    MME_CODE_TO_OCTET_STRING(s1ap_nas_first_req_p->ue_identity.s_tmsi.mme_code,
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                             &ie->value.choice.S_TMSI.mMEC);
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    M_TMSI_TO_OCTET_STRING(s1ap_nas_first_req_p->ue_identity.s_tmsi.m_tmsi,
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                           &ie->value.choice.S_TMSI.m_TMSI);
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
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  }
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  /* optional */
  if (0) {
    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_CSG_Id;
    ie->criticality = S1AP_Criticality_reject;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_CSG_Id;
    // ie->value.choice.CSG_Id = ;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }

  /* optional */
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  if (s1ap_nas_first_req_p->ue_identity.presenceMask & UE_IDENTITIES_gummei) {
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    S1AP_DEBUG("GUMMEI_ID_PRESENT\n");
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    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_GUMMEI_ID;
    ie->criticality = S1AP_Criticality_reject;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_GUMMEI;
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    MCC_MNC_TO_PLMNID(
      s1ap_nas_first_req_p->ue_identity.gummei.mcc,
      s1ap_nas_first_req_p->ue_identity.gummei.mnc,
      s1ap_nas_first_req_p->ue_identity.gummei.mnc_len,
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      &ie->value.choice.GUMMEI.pLMN_Identity);
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    MME_GID_TO_OCTET_STRING(s1ap_nas_first_req_p->ue_identity.gummei.mme_group_id,
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                            &ie->value.choice.GUMMEI.mME_Group_ID);
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    MME_CODE_TO_OCTET_STRING(s1ap_nas_first_req_p->ue_identity.gummei.mme_code,
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                             &ie->value.choice.GUMMEI.mME_Code);
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
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  }

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  /* optional */
#if (S1AP_VERSION >= MAKE_VERSION(9, 0, 0))
  if (0) {
    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_CellAccessMode;
    ie->criticality = S1AP_Criticality_reject;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_CellAccessMode;
    // ie->value.choice.CellAccessMode = ;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }
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  /* optional */
#if (S1AP_VERSION >= MAKE_VERSION(10, 0, 0))
  if (0) {
    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_GW_TransportLayerAddress;
    ie->criticality = S1AP_Criticality_reject;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_TransportLayerAddress;
    // ie->value.choice.TransportLayerAddress =;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }
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  /* optional */
  if (0) {
    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_RelayNode_Indicator;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_RelayNode_Indicator;
    // ie->value.choice.RelayNode_Indicator =;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }

#if (S1AP_VERSION >= MAKE_VERSION(11, 0, 0))
  /* optional */
  if (0) {
    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_GUMMEIType;
    ie->criticality = S1AP_Criticality_reject;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_GUMMEIType;
    // ie->value.choice.GUMMEIType =;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }

  /* optional */ /* release 11 */
  if (0) {
    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_Tunnel_Information_for_BBF;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_TunnelInformation;
    // ie->value.choice.TunnelInformation =;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }

  /* optional */
  if (0) {
    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_SIPTO_L_GW_TransportLayerAddress;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_TransportLayerAddress;
    // ie->value.choice.TransportLayerAddress = ;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }

  /* optional */
  if (0) {
    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_LHN_ID;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_LHN_ID;
    // ie->value.choice.LHN_ID = ue_release_req_p->eNB_ue_s1ap_id;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }

#if (S1AP_VERSION >= MAKE_VERSION(13, 0, 0))
  /* optional */
  if (0) {
    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_MME_Group_ID;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_MME_Group_ID;
    // ie->value.choice.MME_Group_ID =;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }

  /* optional */
  if (0) {
    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_UE_Usage_Type;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_UE_Usage_Type;
    // ie->value.choice.UE_Usage_Type =;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }

  /* optional */
  if (0) {
    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_CE_mode_B_SupportIndicator;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_CE_mode_B_SupportIndicator;
    // ie->value.choice.CE_mode_B_SupportIndicator = ;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }

#if (S1AP_VERSION >= MAKE_VERSION(14, 0, 0))
  /* optional */
  if (0) {
    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_DCN_ID;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_DCN_ID;
    // ie->value.choice.DCN_ID = ;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }

  /* optional */
  if (0) {
    ie = (S1AP_InitialUEMessage_IEs_t *)calloc(1, sizeof(S1AP_InitialUEMessage_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_Coverage_Level;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_InitialUEMessage_IEs__value_PR_Coverage_Level;
    // ie->value.choice.Coverage_Level = ue_release_req_p->eNB_ue_s1ap_id;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }
#endif /* #if (S1AP_VERSION >= MAKE_VERSION(14, 0, 0)) */
#endif /* #if (S1AP_VERSION >= MAKE_VERSION(13, 0, 0)) */
#endif /* #if (S1AP_VERSION >= MAKE_VERSION(11, 0, 0)) */
#endif /* #if (S1AP_VERSION >= MAKE_VERSION(10, 0, 0)) */
#endif /* #if (S1AP_VERSION >= MAKE_VERSION(9, 0, 0)) */

  if (s1ap_eNB_encode_pdu(&pdu, &buffer, &length) < 0) {
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    /* Failed to encode message */
    DevMessage("Failed to encode initial UE message\n");
  }

  /* Update the current S1AP UE state */
  ue_desc_p->ue_state = S1AP_UE_WAITING_CSR;

  /* Assign a stream for this UE :
   * From 3GPP 36.412 7)Transport layers:
   *  Within the SCTP association established between one MME and eNB pair:
   *  - a single pair of stream identifiers shall be reserved for the sole use
   *      of S1AP elementary procedures that utilize non UE-associated signalling.
   *  - At least one pair of stream identifiers shall be reserved for the sole use
   *      of S1AP elementary procedures that utilize UE-associated signallings.
   *      However a few pairs (i.e. more than one) should be reserved.
   *  - A single UE-associated signalling shall use one SCTP stream and
   *      the stream should not be changed during the communication of the
   *      UE-associated signalling.
   */
  mme_desc_p->nextstream = (mme_desc_p->nextstream + 1) % mme_desc_p->out_streams;

  if ((mme_desc_p->nextstream == 0) && (mme_desc_p->out_streams > 1)) {
    mme_desc_p->nextstream += 1;
  }

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  ue_desc_p->tx_stream = mme_desc_p->nextstream;
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  MSC_LOG_TX_MESSAGE(
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    MSC_S1AP_ENB,
    MSC_S1AP_MME,
    (const char *)NULL,
    0,
    MSC_AS_TIME_FMT" initialUEMessage initiatingMessage eNB_ue_s1ap_id %u",
    0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
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    ue_desc_p->eNB_ue_s1ap_id);
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  /* Send encoded message over sctp */
  s1ap_eNB_itti_send_sctp_data_req(instance_p->instance, mme_desc_p->assoc_id,
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                                   buffer, length, ue_desc_p->tx_stream);
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  return 0;
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}
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//------------------------------------------------------------------------------
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int s1ap_eNB_handle_nas_downlink(uint32_t         assoc_id,
                                 uint32_t         stream,
                                 S1AP_S1AP_PDU_t *pdu)
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//------------------------------------------------------------------------------
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{
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  s1ap_eNB_mme_data_t             *mme_desc_p        = NULL;
  s1ap_eNB_ue_context_t           *ue_desc_p         = NULL;
  s1ap_eNB_instance_t             *s1ap_eNB_instance = NULL;
  S1AP_DownlinkNASTransport_t     *container;
  S1AP_DownlinkNASTransport_IEs_t *ie;
  S1AP_ENB_UE_S1AP_ID_t            enb_ue_s1ap_id;
  S1AP_MME_UE_S1AP_ID_t            mme_ue_s1ap_id;
  DevAssert(pdu != NULL);
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  /* UE-related procedure -> stream != 0 */
  if (stream == 0) {
    S1AP_ERROR("[SCTP %d] Received UE-related procedure on stream == 0\n",
               assoc_id);
    return -1;
  }

  if ((mme_desc_p = s1ap_eNB_get_MME(NULL, assoc_id, 0)) == NULL) {
    S1AP_ERROR(
      "[SCTP %d] Received NAS downlink message for non existing MME context\n",
      assoc_id);
    return -1;
  }

  s1ap_eNB_instance = mme_desc_p->s1ap_eNB_instance;

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  /* Prepare the S1AP message to encode */
  container = &pdu->choice.initiatingMessage.value.choice.DownlinkNASTransport;

  S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_DownlinkNASTransport_IEs_t, ie, container,
                             S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID, true);
  mme_ue_s1ap_id = ie->value.choice.MME_UE_S1AP_ID;

  S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_DownlinkNASTransport_IEs_t, ie, container,
                             S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID, true);
  enb_ue_s1ap_id = ie->value.choice.ENB_UE_S1AP_ID;

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  if ((ue_desc_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance,
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                                           enb_ue_s1ap_id)) == NULL) {
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    MSC_LOG_RX_DISCARDED_MESSAGE(
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      MSC_S1AP_ENB,
      MSC_S1AP_MME,
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      NULL,
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      0,
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      MSC_AS_TIME_FMT" downlinkNASTransport  eNB_ue_s1ap_id %u mme_ue_s1ap_id %u",
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      enb_ue_s1ap_id,
      mme_ue_s1ap_id);
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    S1AP_ERROR("[SCTP %d] Received NAS downlink message for non existing UE context eNB_UE_S1AP_ID: 0x%lx\n",
               assoc_id,
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               enb_ue_s1ap_id);
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    return -1;
  }

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  if (0 == ue_desc_p->rx_stream) {
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    ue_desc_p->rx_stream = stream;
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  } else if (stream != ue_desc_p->rx_stream) {
    S1AP_ERROR("[SCTP %d] Received UE-related procedure on stream %u, expecting %u\n",
               assoc_id, stream, ue_desc_p->rx_stream);
    return -1;
  }

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  /* Is it the first outcome of the MME for this UE ? If so store the mme
   * UE s1ap id.
   */
  if (ue_desc_p->mme_ue_s1ap_id == 0) {
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    ue_desc_p->mme_ue_s1ap_id = mme_ue_s1ap_id;
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  } else {
    /* We already have a mme ue s1ap id check the received is the same */
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    if (ue_desc_p->mme_ue_s1ap_id != mme_ue_s1ap_id) {
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      S1AP_ERROR("[SCTP %d] Mismatch in MME UE S1AP ID (0x%lx != 0x%"PRIx32"\n",
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                 assoc_id,
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                 mme_ue_s1ap_id,
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                 ue_desc_p->mme_ue_s1ap_id
                );
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      return -1;
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    }
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  }
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  MSC_LOG_RX_MESSAGE(
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    MSC_S1AP_ENB,
    MSC_S1AP_MME,
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    NULL,
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    0,
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    MSC_AS_TIME_FMT" downlinkNASTransport  eNB_ue_s1ap_id %u mme_ue_s1ap_id %u",
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    assoc_id,
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    mme_ue_s1ap_id);
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  S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_DownlinkNASTransport_IEs_t, ie, container,
                             S1AP_ProtocolIE_ID_id_NAS_PDU, true);
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  /* Forward the NAS PDU to RRC */
  s1ap_eNB_itti_send_nas_downlink_ind(s1ap_eNB_instance->instance,
                                      ue_desc_p->ue_initial_id,
                                      ue_desc_p->eNB_ue_s1ap_id,
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                                      ie->value.choice.NAS_PDU.buf,
                                      ie->value.choice.NAS_PDU.size);
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  // LG: Why set to 0 ??
  //ue_desc_p->ue_initial_id = 0;
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  return 0;
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}

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//------------------------------------------------------------------------------
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int s1ap_eNB_nas_uplink(instance_t instance, s1ap_uplink_nas_t *s1ap_uplink_nas_p)
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//------------------------------------------------------------------------------
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{
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  struct s1ap_eNB_ue_context_s  *ue_context_p;
  s1ap_eNB_instance_t           *s1ap_eNB_instance_p;
  S1AP_S1AP_PDU_t                pdu;
  S1AP_UplinkNASTransport_t     *out;
  S1AP_UplinkNASTransport_IEs_t *ie;
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  uint8_t  *buffer;
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  uint32_t  length;
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  DevAssert(s1ap_uplink_nas_p != NULL);

  /* Retrieve the S1AP eNB instance associated with Mod_id */
  s1ap_eNB_instance_p = s1ap_eNB_get_instance(instance);
  DevAssert(s1ap_eNB_instance_p != NULL);

  if ((ue_context_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance_p, s1ap_uplink_nas_p->eNB_ue_s1ap_id)) == NULL) {
    /* The context for this eNB ue s1ap id doesn't exist in the map of eNB UEs */
    S1AP_WARN("Failed to find ue context associated with eNB ue s1ap id: %06x\n",
              s1ap_uplink_nas_p->eNB_ue_s1ap_id);
    return -1;
  }

  /* Uplink NAS transport can occur either during an s1ap connected state
   * or during initial attach (for example: NAS authentication).
   */
  if (!(ue_context_p->ue_state == S1AP_UE_CONNECTED ||
        ue_context_p->ue_state == S1AP_UE_WAITING_CSR)) {
    S1AP_WARN("You are attempting to send NAS data over non-connected "
              "eNB ue s1ap id: %u, current state: %d\n",
              s1ap_uplink_nas_p->eNB_ue_s1ap_id, ue_context_p->ue_state);
    return -1;
  }

  /* Prepare the S1AP message to encode */
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  memset(&pdu, 0, sizeof(pdu));
  pdu.present = S1AP_S1AP_PDU_PR_initiatingMessage;
  pdu.choice.initiatingMessage.procedureCode = S1AP_ProcedureCode_id_uplinkNASTransport;
  pdu.choice.initiatingMessage.criticality = S1AP_Criticality_ignore;
  pdu.choice.initiatingMessage.value.present = S1AP_InitiatingMessage__value_PR_UplinkNASTransport;
  out = &pdu.choice.initiatingMessage.value.choice.UplinkNASTransport;

  /* mandatory */
  ie = (S1AP_UplinkNASTransport_IEs_t *)calloc(1, sizeof(S1AP_UplinkNASTransport_IEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_reject;
  ie->value.present = S1AP_UplinkNASTransport_IEs__value_PR_MME_UE_S1AP_ID;
  ie->value.choice.MME_UE_S1AP_ID = ue_context_p->mme_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_UplinkNASTransport_IEs_t *)calloc(1, sizeof(S1AP_UplinkNASTransport_IEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_reject;
  ie->value.present = S1AP_UplinkNASTransport_IEs__value_PR_ENB_UE_S1AP_ID;
  ie->value.choice.ENB_UE_S1AP_ID = ue_context_p->eNB_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_UplinkNASTransport_IEs_t *)calloc(1, sizeof(S1AP_UplinkNASTransport_IEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_NAS_PDU;
  ie->criticality = S1AP_Criticality_reject;
  ie->value.present = S1AP_UplinkNASTransport_IEs__value_PR_NAS_PDU;
  ie->value.choice.NAS_PDU.buf = s1ap_uplink_nas_p->nas_pdu.buffer;
  ie->value.choice.NAS_PDU.size = s1ap_uplink_nas_p->nas_pdu.length;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_UplinkNASTransport_IEs_t *)calloc(1, sizeof(S1AP_UplinkNASTransport_IEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_EUTRAN_CGI;
  ie->criticality = S1AP_Criticality_ignore;
  ie->value.present = S1AP_UplinkNASTransport_IEs__value_PR_EUTRAN_CGI;
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  MCC_MNC_TO_PLMNID(
    s1ap_eNB_instance_p->mcc,
    s1ap_eNB_instance_p->mnc,
    s1ap_eNB_instance_p->mnc_digit_length,
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    &ie->value.choice.EUTRAN_CGI.pLMNidentity);
  //#warning "TODO get cell id from RRC"
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  MACRO_ENB_ID_TO_CELL_IDENTITY(s1ap_eNB_instance_p->eNB_id,
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                                0,
                                &ie->value.choice.EUTRAN_CGI.cell_ID);
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_UplinkNASTransport_IEs_t *)calloc(1, sizeof(S1AP_UplinkNASTransport_IEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_TAI;
  ie->criticality = S1AP_Criticality_ignore;
  ie->value.present = S1AP_UplinkNASTransport_IEs__value_PR_TAI;
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  MCC_MNC_TO_PLMNID(
    s1ap_eNB_instance_p->mcc,
    s1ap_eNB_instance_p->mnc,
    s1ap_eNB_instance_p->mnc_digit_length,
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    &ie->value.choice.TAI.pLMNidentity);
  TAC_TO_ASN1(s1ap_eNB_instance_p->tac, &ie->value.choice.TAI.tAC);
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* optional */
#if (S1AP_VERSION >= MAKE_VERSION(10, 0, 0))
  if (0) {
    ie = (S1AP_UplinkNASTransport_IEs_t *)calloc(1, sizeof(S1AP_UplinkNASTransport_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_GW_TransportLayerAddress;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_UplinkNASTransport_IEs__value_PR_TransportLayerAddress;
    // ie->value.choice.TransportLayerAddress = ;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }

  /* optional */
#if (S1AP_VERSION >= MAKE_VERSION(14, 0, 0))
  if (0) {
    ie = (S1AP_UplinkNASTransport_IEs_t *)calloc(1, sizeof(S1AP_UplinkNASTransport_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_SIPTO_L_GW_TransportLayerAddress;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_UplinkNASTransport_IEs__value_PR_TransportLayerAddress;
    // ie->value.choice.TransportLayerAddress = ;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }
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  /* optional */
  if (0) {
    ie = (S1AP_UplinkNASTransport_IEs_t *)calloc(1, sizeof(S1AP_UplinkNASTransport_IEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_LHN_ID;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_UplinkNASTransport_IEs__value_PR_LHN_ID;
    // ie->value.choice.LHN_ID =;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }
#endif /* #if (S1AP_VERSION >= MAKE_VERSION(14, 0, 0)) */
#endif /* #if (S1AP_VERSION >= MAKE_VERSION(10, 0, 0)) */
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  if (s1ap_eNB_encode_pdu(&pdu, &buffer, &length) < 0) {
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    S1AP_ERROR("Failed to encode uplink NAS transport\n");
    /* Encode procedure has failed... */
    return -1;
  }

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  MSC_LOG_TX_MESSAGE(
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    MSC_S1AP_ENB,
    MSC_S1AP_MME,
    (const char *)NULL,
    0,
    MSC_AS_TIME_FMT" uplinkNASTransport initiatingMessage eNB_ue_s1ap_id %u mme_ue_s1ap_id %u",
    0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
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    ue_context_p->eNB_ue_s1ap_id,
    ue_context_p->mme_ue_s1ap_id);
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  /* UE associated signalling -> use the allocated stream */
  s1ap_eNB_itti_send_sctp_data_req(s1ap_eNB_instance_p->instance,
                                   ue_context_p->mme_ref->assoc_id, buffer,
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                                   length, ue_context_p->tx_stream);
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  return 0;
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}
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//------------------------------------------------------------------------------
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int s1ap_eNB_nas_non_delivery_ind(instance_t instance,
                                  s1ap_nas_non_delivery_ind_t *s1ap_nas_non_delivery_ind)
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//------------------------------------------------------------------------------
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{
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  struct s1ap_eNB_ue_context_s        *ue_context_p;
  s1ap_eNB_instance_t                 *s1ap_eNB_instance_p;
  S1AP_S1AP_PDU_t                      pdu;
  S1AP_NASNonDeliveryIndication_t     *out;
  S1AP_NASNonDeliveryIndication_IEs_t *ie;
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  uint8_t  *buffer;
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  uint32_t  length;
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  DevAssert(s1ap_nas_non_delivery_ind != NULL);
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  /* Retrieve the S1AP eNB instance associated with Mod_id */
  s1ap_eNB_instance_p = s1ap_eNB_get_instance(instance);
  DevAssert(s1ap_eNB_instance_p != NULL);
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  if ((ue_context_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance_p, s1ap_nas_non_delivery_ind->eNB_ue_s1ap_id)) == NULL) {
    /* The context for this eNB ue s1ap id doesn't exist in the map of eNB UEs */
    S1AP_WARN("Failed to find ue context associated with eNB ue s1ap id: %06x\n",
              s1ap_nas_non_delivery_ind->eNB_ue_s1ap_id);
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    MSC_LOG_EVENT(
      MSC_S1AP_ENB,
      MSC_AS_TIME_FMT" Sent of NAS_NON_DELIVERY_IND to MME failed, no context for eNB_ue_s1ap_id %06x",
      s1ap_nas_non_delivery_ind->eNB_ue_s1ap_id);
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    return -1;
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  }
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  /* Prepare the S1AP message to encode */
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  memset(&pdu, 0, sizeof(pdu));
  pdu.present = S1AP_S1AP_PDU_PR_initiatingMessage;
  pdu.choice.initiatingMessage.procedureCode = S1AP_ProcedureCode_id_NASNonDeliveryIndication;
  pdu.choice.initiatingMessage.criticality = S1AP_Criticality_ignore;
  pdu.choice.initiatingMessage.value.present = S1AP_InitiatingMessage__value_PR_NASNonDeliveryIndication;
  out = &pdu.choice.initiatingMessage.value.choice.NASNonDeliveryIndication;

  /* mandatory */
  ie = (S1AP_NASNonDeliveryIndication_IEs_t *)calloc(1, sizeof(S1AP_NASNonDeliveryIndication_IEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_reject;
  ie->value.present = S1AP_NASNonDeliveryIndication_IEs__value_PR_MME_UE_S1AP_ID;
  ie->value.choice.MME_UE_S1AP_ID = ue_context_p->mme_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_NASNonDeliveryIndication_IEs_t *)calloc(1, sizeof(S1AP_NASNonDeliveryIndication_IEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_reject;
  ie->value.present = S1AP_NASNonDeliveryIndication_IEs__value_PR_ENB_UE_S1AP_ID;
  ie->value.choice.ENB_UE_S1AP_ID = ue_context_p->eNB_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_NASNonDeliveryIndication_IEs_t *)calloc(1, sizeof(S1AP_NASNonDeliveryIndication_IEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_NAS_PDU;
  ie->criticality = S1AP_Criticality_ignore;
  ie->value.present = S1AP_NASNonDeliveryIndication_IEs__value_PR_NAS_PDU;
  ie->value.choice.NAS_PDU.buf = s1ap_nas_non_delivery_ind->nas_pdu.buffer;
  ie->value.choice.NAS_PDU.size = s1ap_nas_non_delivery_ind->nas_pdu.length;

  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_NASNonDeliveryIndication_IEs_t *)calloc(1, sizeof(S1AP_NASNonDeliveryIndication_IEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_Cause;
  ie->criticality = S1AP_Criticality_ignore;
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  /* Send a dummy cause */
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  ie->value.present = S1AP_NASNonDeliveryIndication_IEs__value_PR_Cause;
  ie->value.choice.Cause.present = S1AP_Cause_PR_radioNetwork;
  ie->value.choice.Cause.choice.radioNetwork = S1AP_CauseRadioNetwork_radio_connection_with_ue_lost;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
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  if (s1ap_eNB_encode_pdu(&pdu, &buffer, &length) < 0) {
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    S1AP_ERROR("Failed to encode NAS NON delivery indication\n");
    /* Encode procedure has failed... */
    MSC_LOG_EVENT(
      MSC_S1AP_ENB,
      MSC_AS_TIME_FMT" Sent of NAS_NON_DELIVERY_IND to MME failed (encoding)");
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    return -1;
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  }

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  MSC_LOG_TX_MESSAGE(
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    MSC_S1AP_ENB,
    MSC_S1AP_MME,
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    (const char *)buffer,
    length,
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    MSC_AS_TIME_FMT" NASNonDeliveryIndication initiatingMessage eNB_ue_s1ap_id %u mme_ue_s1ap_id %u",
    0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
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    ue_context_p->eNB_ue_s1ap_id,
    ue_context_p->mme_ue_s1ap_id);
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  /* UE associated signalling -> use the allocated stream */
  s1ap_eNB_itti_send_sctp_data_req(s1ap_eNB_instance_p->instance,
                                   ue_context_p->mme_ref->assoc_id, buffer,
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                                   length, ue_context_p->tx_stream);
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  return 0;
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}

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//------------------------------------------------------------------------------
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int s1ap_eNB_initial_ctxt_resp(
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  instance_t instance, s1ap_initial_context_setup_resp_t *initial_ctxt_resp_p)
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//------------------------------------------------------------------------------
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{
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  s1ap_eNB_instance_t                   *s1ap_eNB_instance_p = NULL;
  struct s1ap_eNB_ue_context_s          *ue_context_p        = NULL;
  S1AP_S1AP_PDU_t                        pdu;
  S1AP_InitialContextSetupResponse_t    *out;
  S1AP_InitialContextSetupResponseIEs_t *ie;
  uint8_t  *buffer = NULL;
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  uint32_t length;
  int      i;
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  /* Retrieve the S1AP eNB instance associated with Mod_id */
  s1ap_eNB_instance_p = s1ap_eNB_get_instance(instance);
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  DevAssert(initial_ctxt_resp_p != NULL);
  DevAssert(s1ap_eNB_instance_p != NULL);
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  if ((ue_context_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance_p,
                      initial_ctxt_resp_p->eNB_ue_s1ap_id)) == NULL) {
    /* The context for this eNB ue s1ap id doesn't exist in the map of eNB UEs */
    S1AP_WARN("Failed to find ue context associated with eNB ue s1ap id: 0x%06x\n",
              initial_ctxt_resp_p->eNB_ue_s1ap_id);
    return -1;
  }
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  /* Uplink NAS transport can occur either during an s1ap connected state
   * or during initial attach (for example: NAS authentication).
   */
  if (!(ue_context_p->ue_state == S1AP_UE_CONNECTED ||
        ue_context_p->ue_state == S1AP_UE_WAITING_CSR)) {
    S1AP_WARN("You are attempting to send NAS data over non-connected "
              "eNB ue s1ap id: %06x, current state: %d\n",
              initial_ctxt_resp_p->eNB_ue_s1ap_id, ue_context_p->ue_state);
    return -1;
  }
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  /* Prepare the S1AP message to encode */
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  memset(&pdu, 0, sizeof(pdu));
  pdu.present = S1AP_S1AP_PDU_PR_successfulOutcome;
  pdu.choice.successfulOutcome.procedureCode = S1AP_ProcedureCode_id_InitialContextSetup;
  pdu.choice.successfulOutcome.criticality = S1AP_Criticality_reject;
  pdu.choice.successfulOutcome.value.present = S1AP_SuccessfulOutcome__value_PR_InitialContextSetupResponse;
  out = &pdu.choice.successfulOutcome.value.choice.InitialContextSetupResponse;

  /* mandatory */
  ie = (S1AP_InitialContextSetupResponseIEs_t *)calloc(1, sizeof(S1AP_InitialContextSetupResponseIEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_ignore;
  ie->value.present = S1AP_InitialContextSetupResponseIEs__value_PR_MME_UE_S1AP_ID;
  ie->value.choice.MME_UE_S1AP_ID = ue_context_p->mme_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_InitialContextSetupResponseIEs_t *)calloc(1, sizeof(S1AP_InitialContextSetupResponseIEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_ignore;
  ie->value.present = S1AP_InitialContextSetupResponseIEs__value_PR_ENB_UE_S1AP_ID;
  ie->value.choice.ENB_UE_S1AP_ID = initial_ctxt_resp_p->eNB_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_InitialContextSetupResponseIEs_t *)calloc(1, sizeof(S1AP_InitialContextSetupResponseIEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_E_RABSetupListCtxtSURes;
  ie->criticality = S1AP_Criticality_ignore;
  ie->value.present = S1AP_InitialContextSetupResponseIEs__value_PR_E_RABSetupListCtxtSURes;
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  for (i = 0; i < initial_ctxt_resp_p->nb_of_e_rabs; i++) {
    S1AP_E_RABSetupItemCtxtSUResIEs_t *item;
    /* mandatory */
    item = (S1AP_E_RABSetupItemCtxtSUResIEs_t *)calloc(1, sizeof(S1AP_E_RABSetupItemCtxtSUResIEs_t));
    item->id = S1AP_ProtocolIE_ID_id_E_RABSetupItemCtxtSURes;
    item->criticality = S1AP_Criticality_ignore;
    item->value.present = S1AP_E_RABSetupItemCtxtSUResIEs__value_PR_E_RABSetupItemCtxtSURes;
    item->value.choice.E_RABSetupItemCtxtSURes.e_RAB_ID = initial_ctxt_resp_p->e_rabs[i].e_rab_id;
    GTP_TEID_TO_ASN1(initial_ctxt_resp_p->e_rabs[i].gtp_teid, &item->value.choice.E_RABSetupItemCtxtSURes.gTP_TEID);
    item->value.choice.E_RABSetupItemCtxtSURes.transportLayerAddress.buf = malloc(initial_ctxt_resp_p->e_rabs[i].eNB_addr.length);
    memcpy(item->value.choice.E_RABSetupItemCtxtSURes.transportLayerAddress.buf, 
           initial_ctxt_resp_p->e_rabs[i].eNB_addr.buffer,
           initial_ctxt_resp_p->e_rabs[i].eNB_addr.length);
    item->value.choice.E_RABSetupItemCtxtSURes.transportLayerAddress.size = initial_ctxt_resp_p->e_rabs[i].eNB_addr.length;
    item->value.choice.E_RABSetupItemCtxtSURes.transportLayerAddress.bits_unused = 0;
    S1AP_DEBUG("initial_ctxt_resp_p: e_rab ID %ld, enb_addr %d.%d.%d.%d, SIZE %ld \n",
               item->value.choice.E_RABSetupItemCtxtSURes.e_RAB_ID,
               item->value.choice.E_RABSetupItemCtxtSURes.transportLayerAddress.buf[0],
               item->value.choice.E_RABSetupItemCtxtSURes.transportLayerAddress.buf[1],
               item->value.choice.E_RABSetupItemCtxtSURes.transportLayerAddress.buf[2],
               item->value.choice.E_RABSetupItemCtxtSURes.transportLayerAddress.buf[3],
               item->value.choice.E_RABSetupItemCtxtSURes.transportLayerAddress.size);
    ASN_SEQUENCE_ADD(&ie->value.choice.E_RABSetupListCtxtSURes.list, item);
  }
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  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* optional */
  if (initial_ctxt_resp_p->nb_of_e_rabs_failed) {
    ie = (S1AP_InitialContextSetupResponseIEs_t *)calloc(1, sizeof(S1AP_InitialContextSetupResponseIEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_E_RABFailedToSetupListCtxtSURes;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_InitialContextSetupResponseIEs__value_PR_E_RABList;

    for (i = 0; i < initial_ctxt_resp_p->nb_of_e_rabs_failed; i++) {
      S1AP_E_RABItemIEs_t *item;
      /* mandatory */
      item = (S1AP_E_RABItemIEs_t *)calloc(1, sizeof(S1AP_E_RABItemIEs_t));
      item->id = S1AP_ProtocolIE_ID_id_E_RABItem;
      item->criticality = S1AP_Criticality_ignore;
      item->value.present = S1AP_E_RABItemIEs__value_PR_E_RABItem;
      item->value.choice.E_RABItem.e_RAB_ID = initial_ctxt_resp_p->e_rabs_failed[i].e_rab_id;
      item->value.choice.E_RABItem.cause.present = initial_ctxt_resp_p->e_rabs_failed[i].cause;

      switch(item->value.choice.E_RABItem.cause.present)
      {
        case S1AP_Cause_PR_radioNetwork:
          item->value.choice.E_RABItem.cause.choice.radioNetwork = initial_ctxt_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_transport:
          item->value.choice.E_RABItem.cause.choice.transport = initial_ctxt_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_nas:
          item->value.choice.E_RABItem.cause.choice.nas = initial_ctxt_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_protocol:
          item->value.choice.E_RABItem.cause.choice.protocol = initial_ctxt_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_misc:
          item->value.choice.E_RABItem.cause.choice.misc = initial_ctxt_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_NOTHING:
        default:
          break;
      }
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      S1AP_DEBUG("initial context setup response: failed e_rab ID %ld\n", item->value.choice.E_RABItem.e_RAB_ID);
      ASN_SEQUENCE_ADD(&ie->value.choice.E_RABList.list, item);
    }
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    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
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  }
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  /* optional */
  if (0) {
    ie = (S1AP_InitialContextSetupResponseIEs_t *)calloc(1, sizeof(S1AP_InitialContextSetupResponseIEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_CriticalityDiagnostics;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_InitialContextSetupResponseIEs__value_PR_CriticalityDiagnostics;
    // ie->value.choice.CriticalityDiagnostics =;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }

  if (s1ap_eNB_encode_pdu(&pdu, &buffer, &length) < 0) {
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    S1AP_ERROR("Failed to encode uplink NAS transport\n");
    /* Encode procedure has failed... */
    return -1;
  }
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  MSC_LOG_TX_MESSAGE(
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    MSC_S1AP_ENB,
    MSC_S1AP_MME,
    (const char *)buffer,
    length,
    MSC_AS_TIME_FMT" InitialContextSetup successfulOutcome eNB_ue_s1ap_id %u mme_ue_s1ap_id %u",
    0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
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    initial_ctxt_resp_p->eNB_ue_s1ap_id,
    ue_context_p->mme_ue_s1ap_id);
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  /* UE associated signalling -> use the allocated stream */
  s1ap_eNB_itti_send_sctp_data_req(s1ap_eNB_instance_p->instance,
                                   ue_context_p->mme_ref->assoc_id, buffer,
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                                   length, ue_context_p->tx_stream);
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  return 0;
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}

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//------------------------------------------------------------------------------
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int s1ap_eNB_ue_capabilities(instance_t instance,
                             s1ap_ue_cap_info_ind_t *ue_cap_info_ind_p)
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//------------------------------------------------------------------------------
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{
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  s1ap_eNB_instance_t          *s1ap_eNB_instance_p;
  struct s1ap_eNB_ue_context_s *ue_context_p;
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  S1AP_S1AP_PDU_t                       pdu;
  S1AP_UECapabilityInfoIndication_t    *out;
  S1AP_UECapabilityInfoIndicationIEs_t *ie;
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  uint8_t  *buffer;
  uint32_t length;
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  /* Retrieve the S1AP eNB instance associated with Mod_id */
  s1ap_eNB_instance_p = s1ap_eNB_get_instance(instance);
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  DevAssert(ue_cap_info_ind_p != NULL);
  DevAssert(s1ap_eNB_instance_p != NULL);
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  if ((ue_context_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance_p,
                      ue_cap_info_ind_p->eNB_ue_s1ap_id)) == NULL) {
    /* The context for this eNB ue s1ap id doesn't exist in the map of eNB UEs */
    S1AP_WARN("Failed to find ue context associated with eNB ue s1ap id: %u\n",
              ue_cap_info_ind_p->eNB_ue_s1ap_id);
    return -1;
  }
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  /* UE capabilities message can occur either during an s1ap connected state
   * or during initial attach (for example: NAS authentication).
   */
  if (!(ue_context_p->ue_state == S1AP_UE_CONNECTED ||
        ue_context_p->ue_state == S1AP_UE_WAITING_CSR)) {
    S1AP_WARN("You are attempting to send NAS data over non-connected "
              "eNB ue s1ap id: %u, current state: %d\n",
              ue_cap_info_ind_p->eNB_ue_s1ap_id, ue_context_p->ue_state);
    return -1;
  }
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  /* Prepare the S1AP message to encode */
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  memset(&pdu, 0, sizeof(pdu));
  pdu.present = S1AP_S1AP_PDU_PR_initiatingMessage;
  pdu.choice.initiatingMessage.procedureCode = S1AP_ProcedureCode_id_UECapabilityInfoIndication;
  pdu.choice.initiatingMessage.criticality = S1AP_Criticality_ignore;
  pdu.choice.initiatingMessage.value.present = S1AP_InitiatingMessage__value_PR_UECapabilityInfoIndication;
  out = &pdu.choice.initiatingMessage.value.choice.UECapabilityInfoIndication;

  /* mandatory */
  ie = (S1AP_UECapabilityInfoIndicationIEs_t *)calloc(1, sizeof(S1AP_UECapabilityInfoIndicationIEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_reject;
  ie->value.present = S1AP_UECapabilityInfoIndicationIEs__value_PR_MME_UE_S1AP_ID;
  ie->value.choice.MME_UE_S1AP_ID = ue_context_p->mme_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_UECapabilityInfoIndicationIEs_t *)calloc(1, sizeof(S1AP_UECapabilityInfoIndicationIEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_reject;
  ie->value.present = S1AP_UECapabilityInfoIndicationIEs__value_PR_ENB_UE_S1AP_ID;
  ie->value.choice.ENB_UE_S1AP_ID = ue_cap_info_ind_p->eNB_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_UECapabilityInfoIndicationIEs_t *)calloc(1, sizeof(S1AP_UECapabilityInfoIndicationIEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_UERadioCapability;
  ie->criticality = S1AP_Criticality_reject;
  ie->value.present = S1AP_UECapabilityInfoIndicationIEs__value_PR_UERadioCapability;
  ie->value.choice.UERadioCapability.buf = ue_cap_info_ind_p->ue_radio_cap.buffer;
  ie->value.choice.UERadioCapability.size = ue_cap_info_ind_p->ue_radio_cap.length;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* optional */
#if (S1AP_VERSION >= MAKE_VERSION(12, 0, 0))
  if (0) {
    ie = (S1AP_UECapabilityInfoIndicationIEs_t *)calloc(1, sizeof(S1AP_UECapabilityInfoIndicationIEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_UERadioCapabilityForPaging;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_UECapabilityInfoIndicationIEs__value_PR_UERadioCapabilityForPaging;
    // ie->value.choice.UERadioCapabilityForPaging = ;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }
#endif /* #if (S1AP_VERSION >= MAKE_VERSION(14, 0, 0)) */
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  if (s1ap_eNB_encode_pdu(&pdu, &buffer, &length) < 0) {
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    /* Encode procedure has failed... */
    S1AP_ERROR("Failed to encode UE capabilities indication\n");
    return -1;
  }
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  MSC_LOG_TX_MESSAGE(
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    MSC_S1AP_ENB,
    MSC_S1AP_MME,
    (const char *)buffer,
    length,
    MSC_AS_TIME_FMT" UECapabilityInfoIndication initiatingMessage eNB_ue_s1ap_id %u mme_ue_s1ap_id %u",
    0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
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    ue_cap_info_ind_p->eNB_ue_s1ap_id,
    ue_context_p->mme_ue_s1ap_id);
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  /* UE associated signalling -> use the allocated stream */
  s1ap_eNB_itti_send_sctp_data_req(s1ap_eNB_instance_p->instance,
                                   ue_context_p->mme_ref->assoc_id, buffer,
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                                   length, ue_context_p->tx_stream);
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  return 0;
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}
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//------------------------------------------------------------------------------
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int s1ap_eNB_e_rab_setup_resp(instance_t instance,
                              s1ap_e_rab_setup_resp_t *e_rab_setup_resp_p)
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//------------------------------------------------------------------------------
{
  s1ap_eNB_instance_t          *s1ap_eNB_instance_p = NULL;
  struct s1ap_eNB_ue_context_s *ue_context_p        = NULL;
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  S1AP_S1AP_PDU_t               pdu;
  S1AP_E_RABSetupResponse_t    *out;
  S1AP_E_RABSetupResponseIEs_t *ie;
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  uint8_t  *buffer  = NULL;
  uint32_t length;
  int      i;

  /* Retrieve the S1AP eNB instance associated with Mod_id */
  s1ap_eNB_instance_p = s1ap_eNB_get_instance(instance);

  DevAssert(e_rab_setup_resp_p != NULL);
  DevAssert(s1ap_eNB_instance_p != NULL);

  if ((ue_context_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance_p,
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                                              e_rab_setup_resp_p->eNB_ue_s1ap_id)) == NULL) {
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    /* The context for this eNB ue s1ap id doesn't exist in the map of eNB UEs */
    S1AP_WARN("Failed to find ue context associated with eNB ue s1ap id: 0x%06x\n",
              e_rab_setup_resp_p->eNB_ue_s1ap_id);
    return -1;
  }

  /* Uplink NAS transport can occur either during an s1ap connected state
   * or during initial attach (for example: NAS authentication).
   */
  if (!(ue_context_p->ue_state == S1AP_UE_CONNECTED ||
        ue_context_p->ue_state == S1AP_UE_WAITING_CSR)) {
    S1AP_WARN("You are attempting to send NAS data over non-connected "
              "eNB ue s1ap id: %06x, current state: %d\n",
              e_rab_setup_resp_p->eNB_ue_s1ap_id, ue_context_p->ue_state);
    return -1;
  }
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  /* Prepare the S1AP message to encode */
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  memset(&pdu, 0, sizeof(pdu));
  pdu.present = S1AP_S1AP_PDU_PR_successfulOutcome;
  pdu.choice.successfulOutcome.procedureCode = S1AP_ProcedureCode_id_E_RABModify;
  pdu.choice.successfulOutcome.criticality = S1AP_Criticality_reject;
  pdu.choice.successfulOutcome.value.present = S1AP_SuccessfulOutcome__value_PR_E_RABSetupResponse;
  out = &pdu.choice.successfulOutcome.value.choice.E_RABSetupResponse;

  /* mandatory */
  ie = (S1AP_E_RABSetupResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABSetupResponseIEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_ignore;
  ie->value.present = S1AP_E_RABSetupResponseIEs__value_PR_MME_UE_S1AP_ID;
  ie->value.choice.MME_UE_S1AP_ID = ue_context_p->mme_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_E_RABSetupResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABSetupResponseIEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_ignore;
  ie->value.present = S1AP_E_RABSetupResponseIEs__value_PR_ENB_UE_S1AP_ID;
  ie->value.choice.ENB_UE_S1AP_ID = e_rab_setup_resp_p->eNB_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* optional */
  if (e_rab_setup_resp_p->nb_of_e_rabs > 0) {
    ie = (S1AP_E_RABSetupResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABSetupResponseIEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_E_RABSetupListBearerSURes;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_E_RABSetupResponseIEs__value_PR_E_RABSetupListBearerSURes;

    for (i = 0; i < e_rab_setup_resp_p->nb_of_e_rabs; i++) {
      S1AP_E_RABSetupItemBearerSUResIEs_t *item;
      /* mandatory */
      item = (S1AP_E_RABSetupItemBearerSUResIEs_t *)calloc(1, sizeof(S1AP_E_RABSetupItemBearerSUResIEs_t));
      item->id = S1AP_ProtocolIE_ID_id_E_RABSetupItemBearerSURes;
      item->criticality = S1AP_Criticality_ignore;
      item->value.present = S1AP_E_RABSetupItemBearerSUResIEs__value_PR_E_RABSetupItemBearerSURes;
      item->value.choice.E_RABSetupItemBearerSURes.e_RAB_ID = e_rab_setup_resp_p->e_rabs[i].e_rab_id;
      GTP_TEID_TO_ASN1(e_rab_setup_resp_p->e_rabs[i].gtp_teid, &item->value.choice.E_RABSetupItemBearerSURes.gTP_TEID);
      item->value.choice.E_RABSetupItemBearerSURes.transportLayerAddress.buf = malloc(e_rab_setup_resp_p->e_rabs[i].eNB_addr.length);
      memcpy(item->value.choice.E_RABSetupItemBearerSURes.transportLayerAddress.buf,
             e_rab_setup_resp_p->e_rabs[i].eNB_addr.buffer,
             e_rab_setup_resp_p->e_rabs[i].eNB_addr.length);
      item->value.choice.E_RABSetupItemBearerSURes.transportLayerAddress.size = e_rab_setup_resp_p->e_rabs[i].eNB_addr.length;
      item->value.choice.E_RABSetupItemBearerSURes.transportLayerAddress.bits_unused = 0;
      S1AP_DEBUG("e_rab_setup_resp: e_rab ID %ld, teid %u, enb_addr %d.%d.%d.%d, SIZE %ld\n",
                 item->value.choice.E_RABSetupItemBearerSURes.e_RAB_ID,
                 e_rab_setup_resp_p->e_rabs[i].gtp_teid,
                 item->value.choice.E_RABSetupItemBearerSURes.transportLayerAddress.buf[0],
                 item->value.choice.E_RABSetupItemBearerSURes.transportLayerAddress.buf[1],
                 item->value.choice.E_RABSetupItemBearerSURes.transportLayerAddress.buf[2],
                 item->value.choice.E_RABSetupItemBearerSURes.transportLayerAddress.buf[3],
                 item->value.choice.E_RABSetupItemBearerSURes.transportLayerAddress.size);
      ASN_SEQUENCE_ADD(&ie->value.choice.E_RABSetupListBearerSURes.list, item);
    }

    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }

  /* optional */
  if (e_rab_setup_resp_p->nb_of_e_rabs_failed > 0) {
    ie = (S1AP_E_RABSetupResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABSetupResponseIEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_E_RABFailedToSetupListBearerSURes;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_E_RABSetupResponseIEs__value_PR_E_RABList;

    for (i = 0; i < e_rab_setup_resp_p->nb_of_e_rabs_failed; i++) {
      S1AP_E_RABItemIEs_t *item;
      item = (S1AP_E_RABItemIEs_t *)calloc(1, sizeof(S1AP_E_RABItemIEs_t));
      item->id = S1AP_ProtocolIE_ID_id_E_RABItem;
      item->criticality = S1AP_Criticality_ignore;
      item->value.present = S1AP_E_RABItemIEs__value_PR_E_RABItem;
      item->value.choice.E_RABItem.e_RAB_ID = e_rab_setup_resp_p->e_rabs_failed[i].e_rab_id;
      item->value.choice.E_RABItem.cause.present = e_rab_setup_resp_p->e_rabs_failed[i].cause;

      switch(item->value.choice.E_RABItem.cause.present)
      {
        case S1AP_Cause_PR_radioNetwork:
          item->value.choice.E_RABItem.cause.choice.radioNetwork = e_rab_setup_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_transport:
          item->value.choice.E_RABItem.cause.choice.transport = e_rab_setup_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_nas:
          item->value.choice.E_RABItem.cause.choice.nas = e_rab_setup_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_protocol:
          item->value.choice.E_RABItem.cause.choice.protocol = e_rab_setup_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_misc:
          item->value.choice.E_RABItem.cause.choice.misc = e_rab_setup_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_NOTHING:
        default:
          break;
      }

      S1AP_DEBUG("e_rab_modify_resp: failed e_rab ID %ld\n", item->value.choice.E_RABItem.e_RAB_ID);
      ASN_SEQUENCE_ADD(&ie->value.choice.E_RABList.list, item);
    }

    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }

  /* optional */
  if (0) {
    ie = (S1AP_E_RABSetupResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABSetupResponseIEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_CriticalityDiagnostics;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_E_RABSetupResponseIEs__value_PR_CriticalityDiagnostics;
    // ie->value.choice.CriticalityDiagnostics = ;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
1228
  }
1229 1230 1231

  /* S1AP_E_RABSetupListBearerSURes_t  e_RABSetupListBearerSURes;
  memset(&e_RABSetupListBearerSURes, 0, sizeof(S1AP_E_RABSetupListBearerSURes_t));
1232 1233
  if (s1ap_encode_s1ap_e_rabsetuplistbearersures(&e_RABSetupListBearerSURes, &initial_ies_p->e_RABSetupListBearerSURes.s1ap_E_RABSetupItemBearerSURes) < 0 )
    return -1;
1234
  ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_S1AP_E_RABSetupListBearerSURes, &e_RABSetupListBearerSURes);
1235 1236
  */
  fprintf(stderr, "start encode\n");
1237
  if (s1ap_eNB_encode_pdu(&pdu, &buffer, &length) < 0) {
1238
    S1AP_ERROR("Failed to encode uplink transport\n");
1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249
    /* Encode procedure has failed... */
    return -1;
  }

  MSC_LOG_TX_MESSAGE(
    MSC_S1AP_ENB,
    MSC_S1AP_MME,
    (const char *)buffer,
    length,
    MSC_AS_TIME_FMT" E_RAN Setup successfulOutcome eNB_ue_s1ap_id %u mme_ue_s1ap_id %u",
    0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
1250 1251
    e_rab_setup_resp_p->eNB_ue_s1ap_id,
    ue_context_p->mme_ue_s1ap_id);
1252 1253 1254 1255 1256 1257

  /* UE associated signalling -> use the allocated stream */
  s1ap_eNB_itti_send_sctp_data_req(s1ap_eNB_instance_p->instance,
                                   ue_context_p->mme_ref->assoc_id, buffer,
                                   length, ue_context_p->tx_stream);

1258
  return 0;
1259
}
1260 1261 1262

//------------------------------------------------------------------------------
int s1ap_eNB_e_rab_modify_resp(instance_t instance,
1263
                               s1ap_e_rab_modify_resp_t *e_rab_modify_resp_p)
1264 1265
//------------------------------------------------------------------------------
{
1266 1267 1268 1269 1270
  s1ap_eNB_instance_t           *s1ap_eNB_instance_p = NULL;
  struct s1ap_eNB_ue_context_s  *ue_context_p        = NULL;
  S1AP_S1AP_PDU_t                pdu;
  S1AP_E_RABModifyResponse_t    *out;
  S1AP_E_RABModifyResponseIEs_t *ie;
1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282

  uint8_t  *buffer  = NULL;
  uint32_t length;
  int      i;

  /* Retrieve the S1AP eNB instance associated with Mod_id */
  s1ap_eNB_instance_p = s1ap_eNB_get_instance(instance);

  DevAssert(e_rab_modify_resp_p != NULL);
  DevAssert(s1ap_eNB_instance_p != NULL);

  if ((ue_context_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance_p,
1283
                                              e_rab_modify_resp_p->eNB_ue_s1ap_id)) == NULL) {
1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301
    /* The context for this eNB ue s1ap id doesn't exist in the map of eNB UEs */
    S1AP_WARN("Failed to find ue context associated with eNB ue s1ap id: 0x%06x\n",
              e_rab_modify_resp_p->eNB_ue_s1ap_id);
    return -1;
  }

  /* Uplink NAS transport can occur either during an s1ap connected state
   * or during initial attach (for example: NAS authentication).
   */
  if (!(ue_context_p->ue_state == S1AP_UE_CONNECTED ||
        ue_context_p->ue_state == S1AP_UE_WAITING_CSR)) {
    S1AP_WARN("You are attempting to send NAS data over non-connected "
              "eNB ue s1ap id: %06x, current state: %d\n",
              e_rab_modify_resp_p->eNB_ue_s1ap_id, ue_context_p->ue_state);
    return -1;
  }

  /* Prepare the S1AP message to encode */
1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341
  memset(&pdu, 0, sizeof(pdu));
  pdu.present = S1AP_S1AP_PDU_PR_successfulOutcome;
  pdu.choice.successfulOutcome.procedureCode = S1AP_ProcedureCode_id_E_RABModify;
  pdu.choice.successfulOutcome.criticality = S1AP_Criticality_reject;
  pdu.choice.successfulOutcome.value.present = S1AP_SuccessfulOutcome__value_PR_E_RABModifyResponse;
  out = &pdu.choice.successfulOutcome.value.choice.E_RABModifyResponse;

  /* mandatory */
  ie = (S1AP_E_RABModifyResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABModifyResponseIEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_ignore;
  ie->value.present = S1AP_E_RABModifyResponseIEs__value_PR_MME_UE_S1AP_ID;
  ie->value.choice.MME_UE_S1AP_ID = ue_context_p->mme_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_E_RABModifyResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABModifyResponseIEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_ignore;
  ie->value.present = S1AP_E_RABModifyResponseIEs__value_PR_ENB_UE_S1AP_ID;
  ie->value.choice.ENB_UE_S1AP_ID = e_rab_modify_resp_p->eNB_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* optional */
  if (e_rab_modify_resp_p->nb_of_e_rabs > 0) {
    ie = (S1AP_E_RABModifyResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABModifyResponseIEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_E_RABModifyListBearerModRes;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_E_RABModifyResponseIEs__value_PR_E_RABModifyListBearerModRes;

    for (i = 0; i < e_rab_modify_resp_p->nb_of_e_rabs; i++) {
      S1AP_E_RABModifyItemBearerModResIEs_t *item;
      item = (S1AP_E_RABModifyItemBearerModResIEs_t *)calloc(1, sizeof(S1AP_E_RABModifyItemBearerModResIEs_t));
      item->id = S1AP_ProtocolIE_ID_id_E_RABModifyItemBearerModRes;
      item->criticality = S1AP_Criticality_ignore;
      item->value.present = S1AP_E_RABModifyItemBearerModResIEs__value_PR_E_RABModifyItemBearerModRes;
      item->value.choice.E_RABModifyItemBearerModRes.e_RAB_ID = e_rab_modify_resp_p->e_rabs[i].e_rab_id;
      S1AP_DEBUG("e_rab_modify_resp: modified e_rab ID %ld\n", item->value.choice.E_RABModifyItemBearerModRes.e_RAB_ID);
      ASN_SEQUENCE_ADD(&ie->value.choice.E_RABModifyListBearerModRes.list, item);
    }
1342

1343
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
1344 1345
  }

1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385
  /* optional */
  if (e_rab_modify_resp_p->nb_of_e_rabs_failed > 0) {
    ie = (S1AP_E_RABModifyResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABModifyResponseIEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_E_RABFailedToModifyList;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_E_RABModifyResponseIEs__value_PR_E_RABList;

    for (i = 0; i < e_rab_modify_resp_p->nb_of_e_rabs_failed; i++) {
      S1AP_E_RABItemIEs_t *item;
      item = (S1AP_E_RABItemIEs_t *)calloc(1, sizeof(S1AP_E_RABItemIEs_t));
      item->id = S1AP_ProtocolIE_ID_id_E_RABItem;
      item->criticality = S1AP_Criticality_ignore;
      item->value.present = S1AP_E_RABItemIEs__value_PR_E_RABItem;
      item->value.choice.E_RABItem.e_RAB_ID = e_rab_modify_resp_p->e_rabs_failed[i].e_rab_id;
      item->value.choice.E_RABItem.cause.present = e_rab_modify_resp_p->e_rabs_failed[i].cause;

      switch(item->value.choice.E_RABItem.cause.present)
      {
        case S1AP_Cause_PR_radioNetwork:
          item->value.choice.E_RABItem.cause.choice.radioNetwork = e_rab_modify_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_transport:
          item->value.choice.E_RABItem.cause.choice.transport = e_rab_modify_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_nas:
          item->value.choice.E_RABItem.cause.choice.nas = e_rab_modify_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_protocol:
          item->value.choice.E_RABItem.cause.choice.protocol = e_rab_modify_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_misc:
          item->value.choice.E_RABItem.cause.choice.misc = e_rab_modify_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_NOTHING:
        default:
          break;
      }

      S1AP_DEBUG("e_rab_modify_resp: failed e_rab ID %ld\n", item->value.choice.E_RABItem.e_RAB_ID);
      ASN_SEQUENCE_ADD(&ie->value.choice.E_RABList.list, item);
1386 1387
    }

1388 1389
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }
1390

1391 1392 1393 1394 1395 1396 1397 1398
  /* optional */
  if (0) {
    ie = (S1AP_E_RABModifyResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABModifyResponseIEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_CriticalityDiagnostics;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_E_RABModifyResponseIEs__value_PR_CriticalityDiagnostics;
    // ie->value.choice.CriticalityDiagnostics = ;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
1399 1400 1401
  }

  fprintf(stderr, "start encode\n");
1402
  if (s1ap_eNB_encode_pdu(&pdu, &buffer, &length) < 0) {
1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414
    S1AP_ERROR("Failed to encode uplink transport\n");
    /* Encode procedure has failed... */
    return -1;
  }

  MSC_LOG_TX_MESSAGE(
    MSC_S1AP_ENB,
    MSC_S1AP_MME,
    (const char *)buffer,
    length,
    MSC_AS_TIME_FMT" E_RAN Modify successful Outcome eNB_ue_s1ap_id %u mme_ue_s1ap_id %u",
    0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
1415 1416
    e_rab_modify_resp_p->eNB_ue_s1ap_id,
    ue_context_p->mme_ue_s1ap_id);
1417 1418 1419 1420 1421

  /* UE associated signalling -> use the allocated stream */
  s1ap_eNB_itti_send_sctp_data_req(s1ap_eNB_instance_p->instance,
                                   ue_context_p->mme_ref->assoc_id, buffer,
                                   length, ue_context_p->tx_stream);
1422
  return 0;
1423 1424 1425
}
//------------------------------------------------------------------------------
int s1ap_eNB_e_rab_release_resp(instance_t instance,
1426
                                s1ap_e_rab_release_resp_t *e_rab_release_resp_p)
1427 1428
//------------------------------------------------------------------------------
{
1429 1430 1431 1432 1433
  s1ap_eNB_instance_t            *s1ap_eNB_instance_p = NULL;
  struct s1ap_eNB_ue_context_s   *ue_context_p        = NULL;
  S1AP_S1AP_PDU_t                 pdu;
  S1AP_E_RABReleaseResponse_t    *out;
  S1AP_E_RABReleaseResponseIEs_t *ie;
1434 1435 1436
  uint8_t  *buffer  = NULL;
  uint32_t length;
  int      i;
1437

1438 1439 1440 1441 1442 1443
  /* Retrieve the S1AP eNB instance associated with Mod_id */
  s1ap_eNB_instance_p = s1ap_eNB_get_instance(instance);
  DevAssert(e_rab_release_resp_p != NULL);
  DevAssert(s1ap_eNB_instance_p != NULL);

  if ((ue_context_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance_p,
1444
                                              e_rab_release_resp_p->eNB_ue_s1ap_id)) == NULL) {
1445 1446
    /* The context for this eNB ue s1ap id doesn't exist in the map of eNB UEs */
    S1AP_WARN("Failed to find ue context associated with eNB ue s1ap id: %u\n",
1447
              e_rab_release_resp_p->eNB_ue_s1ap_id);
1448 1449 1450
    return -1;
  }

1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491
  /* Prepare the S1AP message to encode */
  memset(&pdu, 0, sizeof(pdu));
  pdu.present = S1AP_S1AP_PDU_PR_successfulOutcome;
  pdu.choice.successfulOutcome.procedureCode = S1AP_ProcedureCode_id_E_RABRelease;
  pdu.choice.successfulOutcome.criticality = S1AP_Criticality_reject;
  pdu.choice.successfulOutcome.value.present = S1AP_SuccessfulOutcome__value_PR_E_RABReleaseResponse;
  out = &pdu.choice.successfulOutcome.value.choice.E_RABReleaseResponse;

  /* mandatory */
  ie = (S1AP_E_RABReleaseResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABReleaseResponseIEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_ignore;
  ie->value.present = S1AP_E_RABReleaseResponseIEs__value_PR_MME_UE_S1AP_ID;
  ie->value.choice.MME_UE_S1AP_ID = ue_context_p->mme_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* mandatory */
  ie = (S1AP_E_RABReleaseResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABReleaseResponseIEs_t));
  ie->id = S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID;
  ie->criticality = S1AP_Criticality_ignore;
  ie->value.present = S1AP_E_RABReleaseResponseIEs__value_PR_ENB_UE_S1AP_ID;
  ie->value.choice.ENB_UE_S1AP_ID = e_rab_release_resp_p->eNB_ue_s1ap_id;
  ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);

  /* optional */
  if (e_rab_release_resp_p->nb_of_e_rabs_released > 0) {
    ie = (S1AP_E_RABReleaseResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABReleaseResponseIEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_E_RABReleaseListBearerRelComp;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_E_RABReleaseResponseIEs__value_PR_E_RABReleaseListBearerRelComp;

    for (i = 0; i < e_rab_release_resp_p->nb_of_e_rabs_released; i++) {
      S1AP_E_RABReleaseItemBearerRelCompIEs_t *item;
      item = (S1AP_E_RABReleaseItemBearerRelCompIEs_t *)calloc(1, sizeof(S1AP_E_RABReleaseItemBearerRelCompIEs_t));
      item->id = S1AP_ProtocolIE_ID_id_E_RABReleaseItemBearerRelComp;
      item->criticality = S1AP_Criticality_ignore;
      item->value.present = S1AP_E_RABReleaseItemBearerRelCompIEs__value_PR_E_RABReleaseItemBearerRelComp;
      item->value.choice.E_RABReleaseItemBearerRelComp.e_RAB_ID = e_rab_release_resp_p->e_rab_release[i].e_rab_id;
      S1AP_DEBUG("e_rab_release_resp: e_rab ID %ld\n", item->value.choice.E_RABReleaseItemBearerRelComp.e_RAB_ID);
      ASN_SEQUENCE_ADD(&ie->value.choice.E_RABReleaseListBearerRelComp.list, item);
    }
1492

1493 1494
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }
1495

1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532
  /* optional */
  if (e_rab_release_resp_p->nb_of_e_rabs_failed > 0) {
    ie = (S1AP_E_RABReleaseResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABReleaseResponseIEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_E_RABFailedToReleaseList;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_E_RABReleaseResponseIEs__value_PR_E_RABList;

    for (i = 0; i < e_rab_release_resp_p->nb_of_e_rabs_failed; i++) {
      S1AP_E_RABItemIEs_t *item;
      item = (S1AP_E_RABItemIEs_t *)calloc(1, sizeof(S1AP_E_RABItemIEs_t));
      item->id = S1AP_ProtocolIE_ID_id_E_RABItem;
      item->criticality = S1AP_Criticality_ignore;
      item->value.present = S1AP_E_RABItemIEs__value_PR_E_RABItem;
      item->value.choice.E_RABItem.e_RAB_ID = e_rab_release_resp_p->e_rabs_failed[i].e_rab_id;
      item->value.choice.E_RABItem.cause.present = e_rab_release_resp_p->e_rabs_failed[i].cause;

      switch(item->value.choice.E_RABItem.cause.present)
      {
        case S1AP_Cause_PR_radioNetwork:
          item->value.choice.E_RABItem.cause.choice.radioNetwork = e_rab_release_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_transport:
          item->value.choice.E_RABItem.cause.choice.transport = e_rab_release_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_nas:
          item->value.choice.E_RABItem.cause.choice.nas = e_rab_release_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_protocol:
          item->value.choice.E_RABItem.cause.choice.protocol = e_rab_release_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_misc:
          item->value.choice.E_RABItem.cause.choice.misc = e_rab_release_resp_p->e_rabs_failed[i].cause_value;
          break;
        case S1AP_Cause_PR_NOTHING:
        default:
          break;
      }
1533

1534 1535
      ASN_SEQUENCE_ADD(&ie->value.choice.E_RABList.list, item);
    }
1536

1537 1538
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
  }
1539

1540 1541 1542 1543 1544 1545 1546 1547
  /* optional */
  if (0) {
    ie = (S1AP_E_RABReleaseResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABReleaseResponseIEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_CriticalityDiagnostics;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_E_RABReleaseResponseIEs__value_PR_CriticalityDiagnostics;
    // ie->value.choice.CriticalityDiagnostics = ;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
1548 1549
  }

1550 1551 1552 1553 1554 1555 1556 1557 1558
  /* optional */
#if (S1AP_VERSION >= MAKE_VERSION(12, 0, 0))
  if(0) {
    ie = (S1AP_E_RABReleaseResponseIEs_t *)calloc(1, sizeof(S1AP_E_RABReleaseResponseIEs_t));
    ie->id = S1AP_ProtocolIE_ID_id_UserLocationInformation;
    ie->criticality = S1AP_Criticality_ignore;
    ie->value.present = S1AP_E_RABReleaseResponseIEs__value_PR_UserLocationInformation;
    // ie->value.choice.UserLocationInformation = ;
    ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
1559
  }
1560
#endif /* #if (S1AP_VERSION >= MAKE_VERSION(14, 0, 0)) */
1561 1562

  fprintf(stderr, "start encode\n");
1563
  if (s1ap_eNB_encode_pdu(&pdu, &buffer, &length) < 0) {
1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584
    S1AP_ERROR("Failed to encode release response\n");
    /* Encode procedure has failed... */
    return -1;
  }

  MSC_LOG_TX_MESSAGE(
    MSC_S1AP_ENB,
    MSC_S1AP_MME,
    (const char *)buffer,
    length,
    MSC_AS_TIME_FMT" E_RAN Release successfulOutcome eNB_ue_s1ap_id %u mme_ue_s1ap_id %u",
    0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
    e_rab_release_resp_p->eNB_ue_s1ap_id,
    ue_context_p->mme_ue_s1ap_id);

  /* UE associated signalling -> use the allocated stream */
  s1ap_eNB_itti_send_sctp_data_req(s1ap_eNB_instance_p->instance,
                                   ue_context_p->mme_ref->assoc_id, buffer,
                                   length, ue_context_p->tx_stream);

  S1AP_INFO("e_rab_release_response sended eNB_UE_S1AP_ID %d  mme_ue_s1ap_id %d nb_of_e_rabs_released %d nb_of_e_rabs_failed %d\n",
1585
            e_rab_release_resp_p->eNB_ue_s1ap_id, ue_context_p->mme_ue_s1ap_id,e_rab_release_resp_p->nb_of_e_rabs_released,e_rab_release_resp_p->nb_of_e_rabs_failed);
1586

1587
  return 0;
1588
}