patch from Stefan Kratochwil <entwicklung@inovel.de> : canfestival-3-fm3_698.patch
Bug:
If an object dictionary entry was requested whose size exceeds
SDO_MAX_LENGTH_TRANSFERT, the memcpy() call at line 139 of objacces.c overwrites
the memory after *pDestData which causes stack corruption.
-> Bugfix:
The bug was corrected by size checking the requested data. An 'Out of
memory' error message will be generated if the requested data exceeds
SDO_MAX_LENGTH_TRANSFERT.
Additional changes:
Added dynamic buffer allocation for the SDO transfer. This feature can be used
if SDO_DYNAMIC_BUFFER_ALLOCATION is defined in config.h. The size of the
dynamically allocated buffer is controlled with
SDO_DYNAMIC_BUFFER_ALLOCATION_SIZE.
-> Note:
This change removes the detection of OD_LENGTH_DATA_INVALID errors!
/*
This file is part of CanFestival, a library implementing CanOpen Stack.
Copyright (C): Edouard TISSERANT and Francis DUPIN
See COPYING file for copyrights details.
This library 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 2.1 of the License, or (at your option) any later version.
This library 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 library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef USE_XENO
//#define eprintf(...) if(0){}
#define eprintf(...)
#elif defined USE_RTAI
#define eprintf(...)
#else
#define eprintf(...) printf (__VA_ARGS__)
#endif
#include "canfestival.h"
/*
#define CAN_FIFO_LENGTH 100
#define DECLARE_A_CAN_FIFO \
static Message FIFO[CAN_FIFO_LENGTH];\
static int FIFO_First = 0;\
static int FIFO_Last = 0;\
\
static void PutInFIFO(Message *m)\
{\
FIFO[FIFO_Last++] = *m;\
FIFO_Last %= CAN_FIFO_LENGTH;\
}\
\
static void GetFromFIFO(Message *m)\
{\
*m = FIFO[FIFO_First++];\
FIFO_First %= CAN_FIFO_LENGTH;\
}\
\
static void TransmitMessage(CO_Data* d, UNS32 id)\
{\
Message m;\
GetFromFIFO(&m);\
canDispatch(d, &m);\
}
*/