112 lines
4.0 KiB
C
112 lines
4.0 KiB
C
/*******************************************************************************
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OpenAirInterface
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Copyright(c) 1999 - 2014 Eurecom
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OpenAirInterface is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenAirInterface is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OpenAirInterface.The full GNU General Public License is
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included in this distribution in the file called "COPYING". If not,
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see <http://www.gnu.org/licenses/>.
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Contact Information
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OpenAirInterface Admin: openair_admin@eurecom.fr
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OpenAirInterface Tech : openair_tech@eurecom.fr
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OpenAirInterface Dev : openair4g-devel@eurecom.fr
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Address : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France.
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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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