Wireshark-bugs: [Wireshark-bugs] [Bug 8741] add UDT protocol support

Date: Fri, 31 May 2013 16:52:29 +0000

Comment # 7 on bug 8741 from
(In reply to comment #4)
> 3. Why is the data dissector called in
> the "middle" of the dissector, with
> the switch statement apparently
> "sharing" the same data.  Are the "types" of
> the switch statement only
> valid when "is control" is true?  If that's the
> case, you can just return
> the number of bytes used up to that point and the
> "dissection
> architecture" will end up calling the data dissector for you (or
> perhaps
> another dissector for that payload)

> If I do it this way, I don't get a
> [Data] tree for the payload section of the UDT data packets.  I believe I am
> doing the right thing but it doesn't work the way I expect when I do it the
> right way.  Yes, that section of the code is a bit hard to read.  I will
> rewrite it.

I don't think the payload of the UDT should be a subtree of UDT, it should be
part of the "main" tree.  UDT is the payload of UDP (which is a payload of IP),
and they all start at the "main" tree.  I didn't see any "Data (dissector)"
packets in your sample trace to use as an example of the difference.

> 5. It looks like the ""Missing Sequence Numbers" would be better as
> expert
> info

> The NAK can contains a single sequence number or a list of
> sequence numbers.  That seems to make it clumsy to represent.

I'll provide a patch for what I'm thinking to see if you like it.


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