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
   */
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <stdint.h>
  
  
  #include "TLVEncoder.h"
  #include "TLVDecoder.h"
  #include "EmmInformation.h"
  
  int decode_emm_information(emm_information_msg *emm_information, uint8_t *buffer, uint32_t len)
  {
    uint32_t decoded = 0;
    int decoded_result = 0;
  
    // Check if we got a NULL pointer and if buffer length is >= minimum length expected for the message.
    CHECK_PDU_POINTER_AND_LENGTH_DECODER(buffer, EMM_INFORMATION_MINIMUM_LENGTH, len);
  
    /* Decoding mandatory fields */
    /* Decoding optional fields */
    while(len - decoded > 0) {
      uint8_t ieiDecoded = *(buffer + decoded);
  
      /* Type | value iei are below 0x80 so just return the first 4 bits */
      if (ieiDecoded >= 0x80)
        ieiDecoded = ieiDecoded & 0xf0;
  
      switch(ieiDecoded) {
      case EMM_INFORMATION_FULL_NAME_FOR_NETWORK_IEI:
        if ((decoded_result =
               decode_network_name(&emm_information->fullnamefornetwork,
                                   EMM_INFORMATION_FULL_NAME_FOR_NETWORK_IEI, buffer +
                                   decoded, len - decoded)) <= 0)
          return decoded_result;
  
        decoded += decoded_result;
        /* Set corresponding mask to 1 in presencemask */
        emm_information->presencemask |= EMM_INFORMATION_FULL_NAME_FOR_NETWORK_PRESENT;
        break;
  
      case EMM_INFORMATION_SHORT_NAME_FOR_NETWORK_IEI:
        if ((decoded_result =
               decode_network_name(&emm_information->shortnamefornetwork,
                                   EMM_INFORMATION_SHORT_NAME_FOR_NETWORK_IEI, buffer +
                                   decoded, len - decoded)) <= 0)
          return decoded_result;
  
        decoded += decoded_result;
        /* Set corresponding mask to 1 in presencemask */
        emm_information->presencemask |= EMM_INFORMATION_SHORT_NAME_FOR_NETWORK_PRESENT;
        break;
  
      case EMM_INFORMATION_LOCAL_TIME_ZONE_IEI:
        if ((decoded_result =
               decode_time_zone(&emm_information->localtimezone,
                                EMM_INFORMATION_LOCAL_TIME_ZONE_IEI, buffer + decoded, len
                                - decoded)) <= 0)
          return decoded_result;
  
        decoded += decoded_result;
        /* Set corresponding mask to 1 in presencemask */
        emm_information->presencemask |= EMM_INFORMATION_LOCAL_TIME_ZONE_PRESENT;
        break;
  
      case EMM_INFORMATION_UNIVERSAL_TIME_AND_LOCAL_TIME_ZONE_IEI:
        if ((decoded_result =
               decode_time_zone_and_time(&emm_information->universaltimeandlocaltimezone,
                                         EMM_INFORMATION_UNIVERSAL_TIME_AND_LOCAL_TIME_ZONE_IEI,
                                         buffer + decoded, len - decoded)) <= 0)
          return decoded_result;
  
        decoded += decoded_result;
        /* Set corresponding mask to 1 in presencemask */
        emm_information->presencemask |= EMM_INFORMATION_UNIVERSAL_TIME_AND_LOCAL_TIME_ZONE_PRESENT;
        break;
  
      case EMM_INFORMATION_NETWORK_DAYLIGHT_SAVING_TIME_IEI:
        if ((decoded_result =
               decode_daylight_saving_time(&emm_information->networkdaylightsavingtime,
                                           EMM_INFORMATION_NETWORK_DAYLIGHT_SAVING_TIME_IEI, buffer +
                                           decoded, len - decoded)) <= 0)
          return decoded_result;
  
        decoded += decoded_result;
        /* Set corresponding mask to 1 in presencemask */
        emm_information->presencemask |= EMM_INFORMATION_NETWORK_DAYLIGHT_SAVING_TIME_PRESENT;
        break;
  
      default:
        errorCodeDecoder = TLV_DECODE_UNEXPECTED_IEI;
        return TLV_DECODE_UNEXPECTED_IEI;
      }
    }
  
    return decoded;
  }
  
  int encode_emm_information(emm_information_msg *emm_information, uint8_t *buffer, uint32_t len)
  {
    int encoded = 0;
    int encode_result = 0;
  
    /* Checking IEI and pointer */
    CHECK_PDU_POINTER_AND_LENGTH_ENCODER(buffer, EMM_INFORMATION_MINIMUM_LENGTH, len);
  
    if ((emm_information->presencemask & EMM_INFORMATION_FULL_NAME_FOR_NETWORK_PRESENT)
        == EMM_INFORMATION_FULL_NAME_FOR_NETWORK_PRESENT) {
      if ((encode_result =
             encode_network_name(&emm_information->fullnamefornetwork,
                                 EMM_INFORMATION_FULL_NAME_FOR_NETWORK_IEI, buffer + encoded, len -
                                 encoded)) < 0)
        // Return in case of error
        return encode_result;
      else
        encoded += encode_result;
    }
  
    if ((emm_information->presencemask & EMM_INFORMATION_SHORT_NAME_FOR_NETWORK_PRESENT)
        == EMM_INFORMATION_SHORT_NAME_FOR_NETWORK_PRESENT) {
      if ((encode_result =
             encode_network_name(&emm_information->shortnamefornetwork,
                                 EMM_INFORMATION_SHORT_NAME_FOR_NETWORK_IEI, buffer + encoded, len
                                 - encoded)) < 0)
        // Return in case of error
        return encode_result;
      else
        encoded += encode_result;
    }
  
    if ((emm_information->presencemask & EMM_INFORMATION_LOCAL_TIME_ZONE_PRESENT)
        == EMM_INFORMATION_LOCAL_TIME_ZONE_PRESENT) {
      if ((encode_result = encode_time_zone(&emm_information->localtimezone,
                                            EMM_INFORMATION_LOCAL_TIME_ZONE_IEI, buffer + encoded, len -
                                            encoded)) < 0)
        // Return in case of error
        return encode_result;
      else
        encoded += encode_result;
    }
  
    if ((emm_information->presencemask & EMM_INFORMATION_UNIVERSAL_TIME_AND_LOCAL_TIME_ZONE_PRESENT)
        == EMM_INFORMATION_UNIVERSAL_TIME_AND_LOCAL_TIME_ZONE_PRESENT) {
      if ((encode_result =
             encode_time_zone_and_time(&emm_information->universaltimeandlocaltimezone,
                                       EMM_INFORMATION_UNIVERSAL_TIME_AND_LOCAL_TIME_ZONE_IEI, buffer +
                                       encoded, len - encoded)) < 0)
        // Return in case of error
        return encode_result;
      else
        encoded += encode_result;
    }
  
    if ((emm_information->presencemask & EMM_INFORMATION_NETWORK_DAYLIGHT_SAVING_TIME_PRESENT)
        == EMM_INFORMATION_NETWORK_DAYLIGHT_SAVING_TIME_PRESENT) {
      if ((encode_result =
             encode_daylight_saving_time(&emm_information->networkdaylightsavingtime,
                                         EMM_INFORMATION_NETWORK_DAYLIGHT_SAVING_TIME_IEI, buffer +
                                         encoded, len - encoded)) < 0)
        // Return in case of error
        return encode_result;
      else
        encoded += encode_result;
    }
  
    return encoded;
  }
  
  