105 lines
3.8 KiB
C
105 lines
3.8 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include "TLVEncoder.h"
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#include "TLVDecoder.h"
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#include "AuthenticationFailure.h"
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int decode_authentication_failure(authentication_failure_msg *authentication_failure, uint8_t *buffer, uint32_t len)
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{
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uint32_t decoded = 0;
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int decoded_result = 0;
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// Check if we got a NULL pointer and if buffer length is >= minimum length expected for the message.
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CHECK_PDU_POINTER_AND_LENGTH_DECODER(buffer, AUTHENTICATION_FAILURE_MINIMUM_LENGTH, len);
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/* Decoding mandatory fields */
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if ((decoded_result = decode_emm_cause(&authentication_failure->emmcause, 0, buffer + decoded, len - decoded)) < 0)
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return decoded_result;
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else
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decoded += decoded_result;
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/* Decoding optional fields */
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while(len - decoded > 0) {
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uint8_t ieiDecoded = *(buffer + decoded);
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/* Type | value iei are below 0x80 so just return the first 4 bits */
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if (ieiDecoded >= 0x80)
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ieiDecoded = ieiDecoded & 0xf0;
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switch(ieiDecoded) {
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case AUTHENTICATION_FAILURE_AUTHENTICATION_FAILURE_PARAMETER_IEI:
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if ((decoded_result =
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decode_authentication_failure_parameter(&authentication_failure->authenticationfailureparameter,
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AUTHENTICATION_FAILURE_AUTHENTICATION_FAILURE_PARAMETER_IEI,
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buffer + decoded, len - decoded)) <= 0)
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return decoded_result;
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decoded += decoded_result;
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/* Set corresponding mask to 1 in presencemask */
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authentication_failure->presencemask |= AUTHENTICATION_FAILURE_AUTHENTICATION_FAILURE_PARAMETER_PRESENT;
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break;
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default:
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errorCodeDecoder = TLV_DECODE_UNEXPECTED_IEI;
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return TLV_DECODE_UNEXPECTED_IEI;
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}
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}
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return decoded;
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}
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int encode_authentication_failure(authentication_failure_msg *authentication_failure, uint8_t *buffer, uint32_t len)
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{
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int encoded = 0;
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int encode_result = 0;
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/* Checking IEI and pointer */
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CHECK_PDU_POINTER_AND_LENGTH_ENCODER(buffer, AUTHENTICATION_FAILURE_MINIMUM_LENGTH, len);
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if ((encode_result = encode_emm_cause(&authentication_failure->emmcause, 0,
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buffer + encoded, len - encoded)) < 0) //Return in case of error
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return encode_result;
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else
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encoded += encode_result;
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if ((authentication_failure->presencemask & AUTHENTICATION_FAILURE_AUTHENTICATION_FAILURE_PARAMETER_PRESENT)
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== AUTHENTICATION_FAILURE_AUTHENTICATION_FAILURE_PARAMETER_PRESENT) {
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if ((encode_result =
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encode_authentication_failure_parameter(&authentication_failure->authenticationfailureparameter,
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AUTHENTICATION_FAILURE_AUTHENTICATION_FAILURE_PARAMETER_IEI,
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buffer + encoded, len - encoded)) < 0)
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// Return in case of error
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return encode_result;
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else
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encoded += encode_result;
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}
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return encoded;
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}
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