112 lines
3.8 KiB
C
112 lines
3.8 KiB
C
/*******************************************************************************
|
|
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 "TLVEncoder.h"
|
|
#include "TLVDecoder.h"
|
|
#include "AttachReject.h"
|
|
|
|
int decode_attach_reject(attach_reject_msg *attach_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, ATTACH_REJECT_MINIMUM_LENGTH, len);
|
|
|
|
/* Decoding mandatory fields */
|
|
if ((decoded_result = decode_emm_cause(&attach_reject->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 ATTACH_REJECT_ESM_MESSAGE_CONTAINER_IEI:
|
|
if ((decoded_result =
|
|
decode_esm_message_container(&attach_reject->esmmessagecontainer,
|
|
ATTACH_REJECT_ESM_MESSAGE_CONTAINER_IEI, buffer + decoded,
|
|
len - decoded)) <= 0)
|
|
return decoded_result;
|
|
|
|
decoded += decoded_result;
|
|
/* Set corresponding mask to 1 in presencemask */
|
|
attach_reject->presencemask |= ATTACH_REJECT_ESM_MESSAGE_CONTAINER_PRESENT;
|
|
break;
|
|
|
|
default:
|
|
errorCodeDecoder = TLV_DECODE_UNEXPECTED_IEI;
|
|
return TLV_DECODE_UNEXPECTED_IEI;
|
|
}
|
|
}
|
|
|
|
return decoded;
|
|
}
|
|
|
|
int encode_attach_reject(attach_reject_msg *attach_reject, 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_REJECT_MINIMUM_LENGTH, len);
|
|
|
|
if ((encode_result = encode_emm_cause(&attach_reject->emmcause, 0, buffer +
|
|
encoded, len - encoded)) < 0) //Return in case of error
|
|
return encode_result;
|
|
else
|
|
encoded += encode_result;
|
|
|
|
if ((attach_reject->presencemask & ATTACH_REJECT_ESM_MESSAGE_CONTAINER_PRESENT)
|
|
== ATTACH_REJECT_ESM_MESSAGE_CONTAINER_PRESENT) {
|
|
if ((encode_result =
|
|
encode_esm_message_container(&attach_reject->esmmessagecontainer,
|
|
ATTACH_REJECT_ESM_MESSAGE_CONTAINER_IEI, buffer + encoded, len -
|
|
encoded)) < 0)
|
|
// Return in case of error
|
|
return encode_result;
|
|
else
|
|
encoded += encode_result;
|
|
}
|
|
|
|
return encoded;
|
|
}
|
|
|