text: /*
   * 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
   */
  
  /*! \file s1ap_eNB_decoder.c
   * \brief s1ap pdu decode procedures for eNB
   * \author Sebastien ROUX and Navid Nikaein
   * \email navid.nikaein@eurecom.fr
   * \date 2013 - 2015
   * \version 0.1
   */
  
  #include <stdio.h>
  
  #include "assertions.h"
  
  #include "intertask_interface.h"
  
  #include "s1ap_common.h"
  #include "s1ap_ies_defs.h"
  #include "s1ap_eNB_decoder.h"
  
  static int s1ap_eNB_decode_initiating_message(s1ap_message *message,
      S1ap_InitiatingMessage_t *initiating_p)
  {
    int         ret = -1;
    MessageDef *message_p;
    char       *message_string = NULL;
    size_t      message_string_size;
    MessagesIds message_id;
  
    DevAssert(initiating_p != NULL);
  
    message_string = calloc(10000, sizeof(char));
  
    s1ap_string_total_size = 0;
  
    message->procedureCode = initiating_p->procedureCode;
    message->criticality   = initiating_p->criticality;
  
    switch(initiating_p->procedureCode) {
    case S1ap_ProcedureCode_id_downlinkNASTransport:
      ret = s1ap_decode_s1ap_downlinknastransporties(
              &message->msg.s1ap_DownlinkNASTransportIEs,
              &initiating_p->value);
      s1ap_xer_print_s1ap_downlinknastransport(s1ap_xer__print2sp,
          message_string,
          message);
      message_id          = S1AP_DOWNLINK_NAS_LOG;
      message_string_size = strlen(message_string);
      message_p           = itti_alloc_new_message_sized(TASK_S1AP,
                            message_id,
                            message_string_size + sizeof (IttiMsgText));
      message_p->ittiMsg.s1ap_downlink_nas_log.size = message_string_size;
      memcpy(&message_p->ittiMsg.s1ap_downlink_nas_log.text, message_string, message_string_size);
      itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
      free(message_string);
      break;
  
    case S1ap_ProcedureCode_id_InitialContextSetup:
      ret = s1ap_decode_s1ap_initialcontextsetuprequesties(
              &message->msg.s1ap_InitialContextSetupRequestIEs, &initiating_p->value);
      s1ap_xer_print_s1ap_initialcontextsetuprequest(s1ap_xer__print2sp, message_string, message);
      message_id = S1AP_INITIAL_CONTEXT_SETUP_LOG;
      message_string_size = strlen(message_string);
      message_p           = itti_alloc_new_message_sized(TASK_S1AP,
                            message_id,
                            message_string_size + sizeof (IttiMsgText));
      message_p->ittiMsg.s1ap_initial_context_setup_log.size = message_string_size;
      memcpy(&message_p->ittiMsg.s1ap_initial_context_setup_log.text, message_string, message_string_size);
      itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
      free(message_string);
      break;
  
    case S1ap_ProcedureCode_id_UEContextRelease:
      ret = s1ap_decode_s1ap_uecontextreleasecommandies(
              &message->msg.s1ap_UEContextReleaseCommandIEs, &initiating_p->value);
      s1ap_xer_print_s1ap_uecontextreleasecommand(s1ap_xer__print2sp, message_string, message);
      message_id = S1AP_UE_CONTEXT_RELEASE_COMMAND_LOG;
      message_string_size = strlen(message_string);
      message_p           = itti_alloc_new_message_sized(TASK_S1AP,
                            message_id,
                            message_string_size + sizeof (IttiMsgText));
      message_p->ittiMsg.s1ap_ue_context_release_command_log.size = message_string_size;
      memcpy(&message_p->ittiMsg.s1ap_ue_context_release_command_log.text, message_string, message_string_size);
      itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
      free(message_string);
      break;
  
    case S1ap_ProcedureCode_id_Paging:
      ret = s1ap_decode_s1ap_pagingies(
              &message->msg.s1ap_PagingIEs, &initiating_p->value);
      s1ap_xer_print_s1ap_paging(s1ap_xer__print2sp, message_string, message);
      S1AP_ERROR("TODO Paging initiating message\n");
      free(message_string);
      break;
  
  
    case S1ap_ProcedureCode_id_E_RABSetup:
      ret = s1ap_decode_s1ap_e_rabsetuprequesties(
  						&message->msg.s1ap_E_RABSetupRequestIEs, &initiating_p->value);
      //s1ap_xer_print_s1ap_e_rabsetuprequest(s1ap_xer__print2sp, message_string, message);
      message_id = S1AP_E_RAB_SETUP_REQUEST_LOG;
      message_string_size = strlen(message_string);
      message_p           = itti_alloc_new_message_sized(TASK_S1AP,
                            message_id,
                            message_string_size + sizeof (IttiMsgText));
      message_p->ittiMsg.s1ap_e_rab_setup_request_log.size = message_string_size;
      memcpy(&message_p->ittiMsg.s1ap_e_rab_setup_request_log.text, message_string, message_string_size);
      itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
      free(message_string);
      S1AP_INFO("E_RABSetup initiating message\n");
      break;
    case S1ap_ProcedureCode_id_E_RABRelease:
      ret = s1ap_decode_s1ap_e_rabreleasecommandies(&message->msg.s1ap_E_RABReleaseCommandIEs, 
  						 &initiating_p->value);
      //s1ap_xer_print_s1ap_e_rabsetuprequest(s1ap_xer__print2sp, message_string, message);
      S1AP_INFO("TODO  E_RABRelease nitiating message\n");
      free(message_string);
      break;
  
    default:
      S1AP_ERROR("Unknown procedure ID (%d) for initiating message\n",
                 (int)initiating_p->procedureCode);
      AssertFatal( 0 , "Unknown procedure ID (%d) for initiating message\n",
                   (int)initiating_p->procedureCode);
      return -1;
    }
  
  
    return ret;
  }
  
  static int s1ap_eNB_decode_successful_outcome(s1ap_message *message,
      S1ap_SuccessfulOutcome_t *successfullOutcome_p)
  {
    int ret = -1;
    MessageDef *message_p;
    char       *message_string = NULL;
    size_t      message_string_size;
    MessagesIds message_id;
  
    DevAssert(successfullOutcome_p != NULL);
  
    message_string = malloc(sizeof(char) * 10000);
  
    s1ap_string_total_size = 0;
  
    message->procedureCode = successfullOutcome_p->procedureCode;
    message->criticality   = successfullOutcome_p->criticality;
  
    switch(successfullOutcome_p->procedureCode) {
    case S1ap_ProcedureCode_id_S1Setup:
      ret = s1ap_decode_s1ap_s1setupresponseies(
              &message->msg.s1ap_S1SetupResponseIEs, &successfullOutcome_p->value);
      s1ap_xer_print_s1ap_s1setupresponse(s1ap_xer__print2sp, message_string, message);
      message_id = S1AP_S1_SETUP_LOG;
      break;
  
    default:
      S1AP_ERROR("Unknown procedure ID (%d) for successfull outcome message\n",
                 (int)successfullOutcome_p->procedureCode);
      return -1;
    }
  
    message_string_size = strlen(message_string);
  
    message_p = itti_alloc_new_message_sized(TASK_S1AP, message_id, message_string_size + sizeof (IttiMsgText));
    message_p->ittiMsg.s1ap_s1_setup_log.size = message_string_size;
    memcpy(&message_p->ittiMsg.s1ap_s1_setup_log.text, message_string, message_string_size);
  
    itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
  
    free(message_string);
  
    return ret;
  }
  
  static int s1ap_eNB_decode_unsuccessful_outcome(s1ap_message *message,
      S1ap_UnsuccessfulOutcome_t *unSuccessfullOutcome_p)
  {
    int ret = -1;
    DevAssert(unSuccessfullOutcome_p != NULL);
  
    message->procedureCode = unSuccessfullOutcome_p->procedureCode;
    message->criticality   = unSuccessfullOutcome_p->criticality;
  
    switch(unSuccessfullOutcome_p->procedureCode) {
    case S1ap_ProcedureCode_id_S1Setup:
      return s1ap_decode_s1ap_s1setupfailureies(
               &message->msg.s1ap_S1SetupFailureIEs, &unSuccessfullOutcome_p->value);
  
    default:
      S1AP_ERROR("Unknown procedure ID (%d) for unsuccessfull outcome message\n",
                 (int)unSuccessfullOutcome_p->procedureCode);
      break;
    }
  
    return ret;
  }
  
  int s1ap_eNB_decode_pdu(s1ap_message *message, const uint8_t * const buffer,
                          const uint32_t length)
  {
    S1AP_PDU_t  pdu;
    S1AP_PDU_t *pdu_p = &pdu;
    asn_dec_rval_t dec_ret;
  
    DevAssert(buffer != NULL);
  
    memset((void *)pdu_p, 0, sizeof(S1AP_PDU_t));
  
    dec_ret = aper_decode(NULL,
                          &asn_DEF_S1AP_PDU,
                          (void **)&pdu_p,
                          buffer,
                          length,
                          0,
                          0);
  
    if (dec_ret.code != RC_OK) {
      S1AP_ERROR("Failed to decode pdu\n");
      return -1;
    }
  
    message->direction = pdu_p->present;
  
    switch(pdu_p->present) {
    case S1AP_PDU_PR_initiatingMessage:
      return s1ap_eNB_decode_initiating_message(message,
             &pdu_p->choice.initiatingMessage);
  
    case S1AP_PDU_PR_successfulOutcome:
      return s1ap_eNB_decode_successful_outcome(message,
             &pdu_p->choice.successfulOutcome);
  
    case S1AP_PDU_PR_unsuccessfulOutcome:
      return s1ap_eNB_decode_unsuccessful_outcome(message,
             &pdu_p->choice.unsuccessfulOutcome);
  
    default:
      S1AP_DEBUG("Unknown presence (%d) or not implemented\n", (int)pdu_p->present);
      break;
    }
  
    return -1;
  }
  