/* * 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 #include #include #include #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; }