cemi_frame.cpp

[ecarjat]

I am using the stack for a TP/IP coupler using an RP2040 and a W5500. I have managed to get the coupler to work, however in order for the ethernet frame to be sent, I've had to modify the check for frame length in cemi_frame.cpp.

Previous code on line 371
if (_length != 0 && _length != (addInfoLen + apduLen + NPDU_LPDU_DIFF + 2))

New code
if (_length != 0 && _length != (addInfoLen + apduLen + NPDU_LPDU_DIFF + 3))

On my system the frame is never valid with the original code. Is this being used elsewhere that in a TP/IP couple scenario ? And why would the check for frame length be different in another scenario ?