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!

SillySlave example for CANfestival

Its purpose is only to check if the selected
driver works at least a minimum. The PC running this demo
must be connected through CAN bus to a working master that 
recognizes the slave nodeId. The slave should be configured
by the master, then switched to operative. After that, when
the master sends a SYNC, the slave answers with PDO1, 
containing an integer that increments each time it is sent.

Please have a look to main.h to tune the master and slave node IDs

It's all. Enjoy it.
GMB
jan 17,2008