Wireshark-dev: Re: [Wireshark-dev] How to handle Ethernet frames with FCS, malformed packet in
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From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Mon, 26 Sep 2011 13:55:36 -0700
On Sep 26, 2011, at 12:34 PM, Guy Harris wrote:

> Yes - it's assuming that it's being handed a tvbuff containing the FCS, *even if the dissector for the link layer knows that there's an FCS*.  That's not what link-layer dissectors should be doing; there was a bug, introduced a while ago, where the Ethernet dissector wasn't removing the FCS if it knew it was there, so perhaps that code was written during the period where that bug was present.  I will remove that code from the PN dissector and leave behind a comment explaining why there is no FCS handling code there.

OK, done.  Try it with the current SVN version of Wireshark.

BTW, is there a spec available for PROFINET Real-Time packets, for non-PROFINET members, either for free or for a not-too-high fee?