Wireshark-bugs: [Wireshark-bugs] [Bug 7255] dissector for generic ISO 7816 messages (atr and apd

Date: Sun, 13 May 2012 13:03:10 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7255

--- Comment #5 from Martin Kaiser <wireshark@xxxxxxxxx> 2012-05-13 13:03:10 PDT ---

Hi Tyson,

(In reply to comment #4)
> PS - You might want to tweak the CCID dissector's RDR_to_PC_DataBlock (0x80)
> message type handler to use your dissector for handling return payloads, when
> it's selected, if you haven't already. (Otherwise, they get dissected as either
> plain Data, or PN532-specific responses).

yes, I added my dissector to both data transfer messages.

> If you're curious about that design decision, it arose because I was originally
> going to support switching protocols on both the Card -> Host, and Host <- Card
> sides as a workaround when I decided to plumb in the PN532 dissector. (Although
> I never got around to implementing the Card-> Host switching mechanism).

Ok. I suspected you ran into problems with the gsm_sim. IIRC, the simtrace
board from the osmocom people seems to capture request and response in one go
and process them as one single message.

Best regards,

    Martin

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