v2gv2gtp for 0.7

git-svn-id: https://svn.code.sf.net/p/openv2g/code/trunk@75 d9f2db14-54d0-4bde-b00c-16405c910529
This commit is contained in:
sebastiankb 2012-07-02 14:20:08 +00:00
parent 57ff27930c
commit 97e9cc9f3b
2 changed files with 151 additions and 0 deletions

97
src/transport/v2gtp.c Normal file
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/*
* Copyright (C) 2007-2012 Siemens AG
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*******************************************************************
*
* @author Sebastian.Kaebisch.EXT@siemens.com
* @version 0.7
* @contact Joerg.Heuer@siemens.com
*
********************************************************************/
/*
* This file implements the v2gtp header writer and reader.
*
*/
#include <stdint.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include "v2gtp.h"
int write_v2gtpHeader(uint8_t* outStream, uint32_t* outStreamLength, uint16_t payloadType)
{
/* write v2gtp version number 1=byte */
outStream[0]=V2GTP_VERSION;
/* write inverse v2gtp version */
outStream[1]=V2GTP_VERSION_INV;
/* write payload type */
outStream[3] = (uint8_t)(payloadType & 0xFF);
outStream[2] = (uint8_t)(payloadType >> 8 & 0xFF);
/* write payload length */
outStream[7] = (uint8_t)(*outStreamLength & 0xFF);
outStream[6] = (uint8_t)(*outStreamLength>>8 & 0xFF);
outStream[5] = (uint8_t)(*outStreamLength>>16 & 0xFF);
outStream[4] = (uint8_t)(*outStreamLength>>24 & 0xFF);
/* here, the outStream length have to be resized by the v2gtp offset*/
*outStreamLength += V2GTP_HEADER_LENGTH;
return 0;
}
int read_v2gtpHeader(uint8_t* inStream, uint32_t inStreamLength, uint32_t* payloadLength)
{
uint16_t payloadType=0;
/* check, if we support this v2gtp version */
if(inStream[0]!=V2GTP_VERSION && inStream[1]!=V2GTP_VERSION_INV)
return -1;
/* check, if we support this payload type*/
payloadType = inStream[2];
payloadType = (payloadType << 8 | inStream[3]);
if(payloadType != V2GTP_EXI_TYPE)
return -1;
/* determine payload length*/
*payloadLength = inStream[4];
*payloadLength = (*payloadLength << 8 | inStream[5]);
*payloadLength = (*payloadLength << 16 | inStream[6]);
*payloadLength = (*payloadLength << 24 | inStream[7]);
if((*payloadLength+V2GTP_HEADER_LENGTH)!=inStreamLength)
return -1;
return 0;
}

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src/transport/v2gtp.h Normal file
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/*
* Copyright (C) 2007-2011 Siemens AG
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*******************************************************************
*
* @author Sebastian.Kaebisch.EXT@siemens.com
* @version 0.7
* @contact Joerg.Heuer@siemens.com
*
********************************************************************/
#ifdef __cplusplus
extern "C" {
#endif
#ifndef V2GTP_H_
#define V2GTP_H_
#include <stdint.h>
/* generic V2GTP header length */
#define V2GTP_HEADER_LENGTH 8
/* define V2GTP Version */
#define V2GTP_VERSION 0x01
#define V2GTP_VERSION_INV 0xFE
/* define V2GTP payload types*/
#define V2GTP_EXI_TYPE 0x8001
int write_v2gtpHeader(uint8_t* outStream, uint32_t* outStreamLength, uint16_t payloadType);
int read_v2gtpHeader(uint8_t* inStream, uint32_t inStreamLength, uint32_t* payloadLength);
#endif /* V2GTP_H_ */
#ifdef __cplusplus
}
#endif