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openairinterface5g/openair-cn/NAS/COMMON/EMM/MSG/AttachRequest.c
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/*******************************************************************************
OpenAirInterface
Copyright(c) 1999 - 2014 Eurecom
OpenAirInterface is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenAirInterface is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OpenAirInterface.The full GNU General Public License is
included in this distribution in the file called "COPYING". If not,
see <http://www.gnu.org/licenses/>.
Contact Information
OpenAirInterface Admin: openair_admin@eurecom.fr
OpenAirInterface Tech : openair_tech@eurecom.fr
OpenAirInterface Dev : openair4g-devel@eurecom.fr
Address : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France.
*******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include "nas_log.h"
#include "TLVEncoder.h"
#include "TLVDecoder.h"
#include "AttachRequest.h"
int decode_attach_request(attach_request_msg *attach_request, uint8_t *buffer, uint32_t len)
{
uint32_t decoded = 0;
int decoded_result = 0;
LOG_FUNC_IN;
LOG_TRACE(INFO, "EMM - attach_request len = %d",
len);
// 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, ATTACH_REQUEST_MINIMUM_LENGTH, len);
/* Decoding mandatory fields */
if ((decoded_result = decode_u8_eps_attach_type(&attach_request->epsattachtype, 0, *(buffer + decoded) & 0x0f, len - decoded)) < 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
if ((decoded_result = decode_u8_nas_key_set_identifier(&attach_request->naskeysetidentifier, 0, *(buffer + decoded) >> 4, len - decoded)) < 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
decoded++;
if ((decoded_result = decode_eps_mobile_identity(&attach_request->oldgutiorimsi, 0, buffer + decoded, len - decoded)) < 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
} else
decoded += decoded_result;
if ((decoded_result = decode_ue_network_capability(&attach_request->uenetworkcapability, 0, buffer + decoded, len - decoded)) < 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
} else
decoded += decoded_result;
if ((decoded_result = decode_esm_message_container(&attach_request->esmmessagecontainer, 0, buffer + decoded, len - decoded)) < 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
} else
decoded += decoded_result;
/* 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 ATTACH_REQUEST_OLD_PTMSI_SIGNATURE_IEI:
if ((decoded_result =
decode_p_tmsi_signature(&attach_request->oldptmsisignature,
ATTACH_REQUEST_OLD_PTMSI_SIGNATURE_IEI, buffer + decoded,
len - decoded)) <= 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
attach_request->presencemask |= ATTACH_REQUEST_OLD_PTMSI_SIGNATURE_PRESENT;
break;
case ATTACH_REQUEST_ADDITIONAL_GUTI_IEI:
if ((decoded_result =
decode_eps_mobile_identity(&attach_request->additionalguti,
ATTACH_REQUEST_ADDITIONAL_GUTI_IEI, buffer + decoded, len -
decoded)) <= 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
attach_request->presencemask |= ATTACH_REQUEST_ADDITIONAL_GUTI_PRESENT;
break;
case ATTACH_REQUEST_LAST_VISITED_REGISTERED_TAI_IEI:
if ((decoded_result =
decode_tracking_area_identity(&attach_request->lastvisitedregisteredtai,
ATTACH_REQUEST_LAST_VISITED_REGISTERED_TAI_IEI, buffer +
decoded, len - decoded)) <= 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
attach_request->presencemask |= ATTACH_REQUEST_LAST_VISITED_REGISTERED_TAI_PRESENT;
break;
case ATTACH_REQUEST_DRX_PARAMETER_IEI:
if ((decoded_result =
decode_drx_parameter(&attach_request->drxparameter,
ATTACH_REQUEST_DRX_PARAMETER_IEI, buffer + decoded, len -
decoded)) <= 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
attach_request->presencemask |= ATTACH_REQUEST_DRX_PARAMETER_PRESENT;
break;
case ATTACH_REQUEST_MS_NETWORK_CAPABILITY_IEI:
if ((decoded_result =
decode_ms_network_capability(&attach_request->msnetworkcapability,
ATTACH_REQUEST_MS_NETWORK_CAPABILITY_IEI, buffer + decoded,
len - decoded)) <= 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
attach_request->presencemask |= ATTACH_REQUEST_MS_NETWORK_CAPABILITY_PRESENT;
break;
case ATTACH_REQUEST_OLD_LOCATION_AREA_IDENTIFICATION_IEI:
if ((decoded_result =
decode_location_area_identification(&attach_request->oldlocationareaidentification,
ATTACH_REQUEST_OLD_LOCATION_AREA_IDENTIFICATION_IEI, buffer
+ decoded, len - decoded)) <= 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
attach_request->presencemask |= ATTACH_REQUEST_OLD_LOCATION_AREA_IDENTIFICATION_PRESENT;
break;
case ATTACH_REQUEST_TMSI_STATUS_IEI:
if ((decoded_result =
decode_tmsi_status(&attach_request->tmsistatus,
ATTACH_REQUEST_TMSI_STATUS_IEI, buffer + decoded, len -
decoded)) <= 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
attach_request->presencemask |= ATTACH_REQUEST_TMSI_STATUS_PRESENT;
break;
case ATTACH_REQUEST_MOBILE_STATION_CLASSMARK_2_IEI:
if ((decoded_result =
decode_mobile_station_classmark_2(&attach_request->mobilestationclassmark2,
ATTACH_REQUEST_MOBILE_STATION_CLASSMARK_2_IEI, buffer +
decoded, len - decoded)) <= 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
attach_request->presencemask |= ATTACH_REQUEST_MOBILE_STATION_CLASSMARK_2_PRESENT;
break;
case ATTACH_REQUEST_MOBILE_STATION_CLASSMARK_3_IEI:
if ((decoded_result =
decode_mobile_station_classmark_3(&attach_request->mobilestationclassmark3,
ATTACH_REQUEST_MOBILE_STATION_CLASSMARK_3_IEI, buffer +
decoded, len - decoded)) <= 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
attach_request->presencemask |= ATTACH_REQUEST_MOBILE_STATION_CLASSMARK_3_PRESENT;
break;
case ATTACH_REQUEST_SUPPORTED_CODECS_IEI:
if ((decoded_result =
decode_supported_codec_list(&attach_request->supportedcodecs,
ATTACH_REQUEST_SUPPORTED_CODECS_IEI, buffer + decoded, len
- decoded)) <= 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
attach_request->presencemask |= ATTACH_REQUEST_SUPPORTED_CODECS_PRESENT;
break;
case ATTACH_REQUEST_ADDITIONAL_UPDATE_TYPE_IEI:
if ((decoded_result =
decode_additional_update_type(&attach_request->additionalupdatetype,
ATTACH_REQUEST_ADDITIONAL_UPDATE_TYPE_IEI, buffer +
decoded, len - decoded)) <= 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
attach_request->presencemask |= ATTACH_REQUEST_ADDITIONAL_UPDATE_TYPE_PRESENT;
break;
case ATTACH_REQUEST_OLD_GUTI_TYPE_IEI:
if ((decoded_result =
decode_guti_type(&attach_request->oldgutitype,
ATTACH_REQUEST_OLD_GUTI_TYPE_IEI,
buffer + decoded, len - decoded)) <= 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
attach_request->presencemask |= ATTACH_REQUEST_OLD_GUTI_TYPE_PRESENT;
break;
case ATTACH_REQUEST_VOICE_DOMAIN_PREFERENCE_AND_UE_USAGE_SETTING_IEI:
if ((decoded_result =
decode_voice_domain_preference_and_ue_usage_setting(&attach_request->voicedomainpreferenceandueusagesetting,
ATTACH_REQUEST_VOICE_DOMAIN_PREFERENCE_AND_UE_USAGE_SETTING_IEI,
buffer + decoded, len - decoded)) <= 0) {
// return decoded_result;
LOG_FUNC_RETURN(decoded_result);
}
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
attach_request->presencemask |= ATTACH_REQUEST_VOICE_DOMAIN_PREFERENCE_AND_UE_USAGE_SETTING_PRESENT;
break;
default:
errorCodeDecoder = TLV_DECODE_UNEXPECTED_IEI;
{
// return TLV_DECODE_UNEXPECTED_IEI;
LOG_FUNC_RETURN(TLV_DECODE_UNEXPECTED_IEI);
}
}
}
LOG_FUNC_RETURN(decoded);
}
int encode_attach_request(attach_request_msg *attach_request, uint8_t *buffer, uint32_t len)
{
int encoded = 0;
int encode_result = 0;
/* Checking IEI and pointer */
CHECK_PDU_POINTER_AND_LENGTH_ENCODER(buffer, ATTACH_REQUEST_MINIMUM_LENGTH, len);
*(buffer + encoded) = ((encode_u8_nas_key_set_identifier(&attach_request->naskeysetidentifier) & 0x0f) << 4) | (encode_u8_eps_attach_type(&attach_request->epsattachtype) & 0x0f);
encoded++;
if ((encode_result =
encode_eps_mobile_identity(&attach_request->oldgutiorimsi, 0, buffer +
encoded, len - encoded)) < 0) //Return in case of error
return encode_result;
else
encoded += encode_result;
if ((encode_result =
encode_ue_network_capability(&attach_request->uenetworkcapability, 0,
buffer + encoded, len - encoded)) < 0) //Return in case of error
return encode_result;
else
encoded += encode_result;
if ((encode_result =
encode_esm_message_container(&attach_request->esmmessagecontainer, 0,
buffer + encoded, len - encoded)) < 0) //Return in case of error
return encode_result;
else
encoded += encode_result;
if ((attach_request->presencemask & ATTACH_REQUEST_OLD_PTMSI_SIGNATURE_PRESENT)
== ATTACH_REQUEST_OLD_PTMSI_SIGNATURE_PRESENT) {
if ((encode_result =
encode_p_tmsi_signature(&attach_request->oldptmsisignature,
ATTACH_REQUEST_OLD_PTMSI_SIGNATURE_IEI, buffer + encoded, len -
encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
if ((attach_request->presencemask & ATTACH_REQUEST_ADDITIONAL_GUTI_PRESENT)
== ATTACH_REQUEST_ADDITIONAL_GUTI_PRESENT) {
if ((encode_result =
encode_eps_mobile_identity(&attach_request->additionalguti,
ATTACH_REQUEST_ADDITIONAL_GUTI_IEI, buffer + encoded, len -
encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
if ((attach_request->presencemask & ATTACH_REQUEST_LAST_VISITED_REGISTERED_TAI_PRESENT)
== ATTACH_REQUEST_LAST_VISITED_REGISTERED_TAI_PRESENT) {
if ((encode_result =
encode_tracking_area_identity(&attach_request->lastvisitedregisteredtai,
ATTACH_REQUEST_LAST_VISITED_REGISTERED_TAI_IEI, buffer + encoded,
len - encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
if ((attach_request->presencemask & ATTACH_REQUEST_DRX_PARAMETER_PRESENT)
== ATTACH_REQUEST_DRX_PARAMETER_PRESENT) {
if ((encode_result = encode_drx_parameter(&attach_request->drxparameter,
ATTACH_REQUEST_DRX_PARAMETER_IEI, buffer + encoded, len -
encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
if ((attach_request->presencemask & ATTACH_REQUEST_MS_NETWORK_CAPABILITY_PRESENT)
== ATTACH_REQUEST_MS_NETWORK_CAPABILITY_PRESENT) {
if ((encode_result =
encode_ms_network_capability(&attach_request->msnetworkcapability,
ATTACH_REQUEST_MS_NETWORK_CAPABILITY_IEI, buffer + encoded, len -
encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
if ((attach_request->presencemask & ATTACH_REQUEST_OLD_LOCATION_AREA_IDENTIFICATION_PRESENT)
== ATTACH_REQUEST_OLD_LOCATION_AREA_IDENTIFICATION_PRESENT) {
if ((encode_result =
encode_location_area_identification(&attach_request->oldlocationareaidentification,
ATTACH_REQUEST_OLD_LOCATION_AREA_IDENTIFICATION_IEI, buffer +
encoded, len - encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
if ((attach_request->presencemask & ATTACH_REQUEST_TMSI_STATUS_PRESENT)
== ATTACH_REQUEST_TMSI_STATUS_PRESENT) {
if ((encode_result = encode_tmsi_status(&attach_request->tmsistatus,
ATTACH_REQUEST_TMSI_STATUS_IEI, buffer + encoded, len - encoded))
< 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
if ((attach_request->presencemask & ATTACH_REQUEST_MOBILE_STATION_CLASSMARK_2_PRESENT)
== ATTACH_REQUEST_MOBILE_STATION_CLASSMARK_2_PRESENT) {
if ((encode_result =
encode_mobile_station_classmark_2(&attach_request->mobilestationclassmark2,
ATTACH_REQUEST_MOBILE_STATION_CLASSMARK_2_IEI, buffer + encoded,
len - encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
if ((attach_request->presencemask & ATTACH_REQUEST_MOBILE_STATION_CLASSMARK_3_PRESENT)
== ATTACH_REQUEST_MOBILE_STATION_CLASSMARK_3_PRESENT) {
if ((encode_result =
encode_mobile_station_classmark_3(&attach_request->mobilestationclassmark3,
ATTACH_REQUEST_MOBILE_STATION_CLASSMARK_3_IEI, buffer + encoded,
len - encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
if ((attach_request->presencemask & ATTACH_REQUEST_SUPPORTED_CODECS_PRESENT)
== ATTACH_REQUEST_SUPPORTED_CODECS_PRESENT) {
if ((encode_result =
encode_supported_codec_list(&attach_request->supportedcodecs,
ATTACH_REQUEST_SUPPORTED_CODECS_IEI, buffer + encoded, len -
encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
if ((attach_request->presencemask & ATTACH_REQUEST_ADDITIONAL_UPDATE_TYPE_PRESENT)
== ATTACH_REQUEST_ADDITIONAL_UPDATE_TYPE_PRESENT) {
if ((encode_result =
encode_additional_update_type(&attach_request->additionalupdatetype,
ATTACH_REQUEST_ADDITIONAL_UPDATE_TYPE_IEI, buffer + encoded, len -
encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
if ((attach_request->presencemask & ATTACH_REQUEST_OLD_GUTI_TYPE_PRESENT)
== ATTACH_REQUEST_OLD_GUTI_TYPE_PRESENT) {
if ((encode_result =
encode_guti_type(&attach_request->oldgutitype,
ATTACH_REQUEST_OLD_GUTI_TYPE_IEI,
buffer + encoded, len - encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
if ((attach_request->presencemask & ATTACH_REQUEST_VOICE_DOMAIN_PREFERENCE_AND_UE_USAGE_SETTING_PRESENT)
== ATTACH_REQUEST_VOICE_DOMAIN_PREFERENCE_AND_UE_USAGE_SETTING_PRESENT) {
if ((encode_result =
encode_voice_domain_preference_and_ue_usage_setting(&attach_request->voicedomainpreferenceandueusagesetting,
ATTACH_REQUEST_VOICE_DOMAIN_PREFERENCE_AND_UE_USAGE_SETTING_IEI,
buffer + encoded, len - encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
return encoded;
}
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