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; }