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/*
* Copyright (c) 2015, EURECOM (www.eurecom.fr)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those
* of the authors and should not be interpreted as representing official policies,
* either expressed or implied, of the FreeBSD Project.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include "TLVEncoder.h"
#include "TLVDecoder.h"
#include "PdnConnectivityRequest.h"
int decode_pdn_connectivity_request(pdn_connectivity_request_msg *pdn_connectivity_request, 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, PDN_CONNECTIVITY_REQUEST_MINIMUM_LENGTH, len);
/* Decoding mandatory fields */
if ((decoded_result = decode_u8_request_type(&pdn_connectivity_request->pdntype, 0, *(buffer + decoded) >> 4, len - decoded)) < 0)
return decoded_result;
if ((decoded_result = decode_u8_pdn_type(&pdn_connectivity_request->requesttype, 0, *(buffer + decoded) & 0x0f, len - decoded)) < 0)
return decoded_result;
decoded++;
/* 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 PDN_CONNECTIVITY_REQUEST_ESM_INFORMATION_TRANSFER_FLAG_IEI:
if ((decoded_result =
decode_esm_information_transfer_flag(&pdn_connectivity_request->esminformationtransferflag,
PDN_CONNECTIVITY_REQUEST_ESM_INFORMATION_TRANSFER_FLAG_IEI,
buffer + decoded, len - decoded)) <= 0)
return decoded_result;
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
pdn_connectivity_request->presencemask |= PDN_CONNECTIVITY_REQUEST_ESM_INFORMATION_TRANSFER_FLAG_PRESENT;
break;
case PDN_CONNECTIVITY_REQUEST_ACCESS_POINT_NAME_IEI:
if ((decoded_result =
decode_access_point_name(&pdn_connectivity_request->accesspointname,
PDN_CONNECTIVITY_REQUEST_ACCESS_POINT_NAME_IEI, buffer +
decoded, len - decoded)) <= 0)
return decoded_result;
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
pdn_connectivity_request->presencemask |= PDN_CONNECTIVITY_REQUEST_ACCESS_POINT_NAME_PRESENT;
break;
case PDN_CONNECTIVITY_REQUEST_PROTOCOL_CONFIGURATION_OPTIONS_IEI:
if ((decoded_result =
decode_protocol_configuration_options(&pdn_connectivity_request->protocolconfigurationoptions,
PDN_CONNECTIVITY_REQUEST_PROTOCOL_CONFIGURATION_OPTIONS_IEI,
buffer + decoded, len - decoded)) <= 0)
return decoded_result;
decoded += decoded_result;
/* Set corresponding mask to 1 in presencemask */
pdn_connectivity_request->presencemask |= PDN_CONNECTIVITY_REQUEST_PROTOCOL_CONFIGURATION_OPTIONS_PRESENT;
break;
default:
errorCodeDecoder = TLV_DECODE_UNEXPECTED_IEI;
return TLV_DECODE_UNEXPECTED_IEI;
}
}
return decoded;
}
int encode_pdn_connectivity_request(pdn_connectivity_request_msg *pdn_connectivity_request, uint8_t *buffer, uint32_t len)
{
int encoded = 0;
int encode_result = 0;
/* Checking IEI and pointer */
CHECK_PDU_POINTER_AND_LENGTH_ENCODER(buffer, PDN_CONNECTIVITY_REQUEST_MINIMUM_LENGTH, len);
*(buffer + encoded) = ((encode_u8_pdn_type(&pdn_connectivity_request->pdntype) & 0x0f) << 4) | (encode_u8_request_type(&pdn_connectivity_request->requesttype) & 0x0f);
encoded++;
if ((pdn_connectivity_request->presencemask & PDN_CONNECTIVITY_REQUEST_ESM_INFORMATION_TRANSFER_FLAG_PRESENT)
== PDN_CONNECTIVITY_REQUEST_ESM_INFORMATION_TRANSFER_FLAG_PRESENT) {
if ((encode_result =
encode_esm_information_transfer_flag(&pdn_connectivity_request->esminformationtransferflag,
PDN_CONNECTIVITY_REQUEST_ESM_INFORMATION_TRANSFER_FLAG_IEI, buffer
+ encoded, len - encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
if ((pdn_connectivity_request->presencemask & PDN_CONNECTIVITY_REQUEST_ACCESS_POINT_NAME_PRESENT)
== PDN_CONNECTIVITY_REQUEST_ACCESS_POINT_NAME_PRESENT) {
if ((encode_result =
encode_access_point_name(&pdn_connectivity_request->accesspointname,
PDN_CONNECTIVITY_REQUEST_ACCESS_POINT_NAME_IEI, buffer + encoded,
len - encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
if ((pdn_connectivity_request->presencemask & PDN_CONNECTIVITY_REQUEST_PROTOCOL_CONFIGURATION_OPTIONS_PRESENT)
== PDN_CONNECTIVITY_REQUEST_PROTOCOL_CONFIGURATION_OPTIONS_PRESENT) {
if ((encode_result =
encode_protocol_configuration_options(&pdn_connectivity_request->protocolconfigurationoptions,
PDN_CONNECTIVITY_REQUEST_PROTOCOL_CONFIGURATION_OPTIONS_IEI,
buffer + encoded, len - encoded)) < 0)
// Return in case of error
return encode_result;
else
encoded += encode_result;
}
return encoded;
}