int decode_security_mode_reject(security_mode_reject_msg *security_mode_reject, 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, SECURITY_MODE_REJECT_MINIMUM_LENGTH, len);
/* Decoding mandatory fields */
if ((decoded_result = decode_emm_cause(&security_mode_reject->emmcause, 0, buffer + decoded, len - decoded)) < 0)
return decoded_result;
else
decoded += decoded_result;
return decoded;
}
int decode_emm_status(emm_status_msg *emm_status, 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_STATUS_MINIMUM_LENGTH, len);
/* Decoding mandatory fields */
if ((decoded_result = decode_emm_cause(&emm_status->emmcause, 0, buffer + decoded, len - decoded)) < 0)
return decoded_result;
else
decoded += decoded_result;
return decoded;
}
int decode_authentication_failure(authentication_failure_msg *authentication_failure, 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, AUTHENTICATION_FAILURE_MINIMUM_LENGTH, len);
/* Decoding mandatory fields */
if ((decoded_result = decode_emm_cause(&authentication_failure->emmcause, 0, buffer + decoded, len - decoded)) < 0)
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 AUTHENTICATION_FAILURE_AUTHENTICATION_FAILURE_PARAMETER_IEI:
if ((decoded_result =
decode_authentication_failure_parameter(&authentication_failure->authenticationfailureparameter,
AUTHENTICATION_FAILURE_AUTHENTICATION_FAILURE_PARAMETER_IEI,
buffer + decoded, len - decoded)) <= 0)
return decoded_result;
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
authentication_failure->presencemask |= AUTHENTICATION_FAILURE_AUTHENTICATION_FAILURE_PARAMETER_PRESENT;
break;
default:
errorCodeDecoder = TLV_DECODE_UNEXPECTED_IEI;
return TLV_DECODE_UNEXPECTED_IEI;
}
}
return decoded;
}
