Wireshark · Wireshark-dev: Re: [Wireshark-dev] Display IPv6 extension headers outside of the IPv6 subtree

[João Valverde <joao.valverde@xxxxxxxxxxxxxxxxxx>]

On 08/21/2015 05:45 PM, João Valverde wrote:
> Hi,
>
> I would like to propose a patch to remove IPv6 extension headers from
> the IPv6 subtree and display them as normal IP protocols in the UI.
>
> Arguments for:
>
> a) The current behaviour really, really, (really) hurts legibility
> b) It would be consistent among all extension headers (see for example
> MobileIPv6 vs AH - why the difference?)[1]
> c) Extension headers aren't special in this regard, the IP protocol
> space is shared
> d) IPv6 extension headers over IPv4 would be dissected, as they should.

I'll probably be submitting a patch for review to address this. I don't 
even think it is an error to carry an IPv6 extension header on top of 
IPv4. One my pending tasks involves exactly this: finishing an IPv6 to 
IPv4 translator that carries an IPv6 routing header on top of IPv4 (that 
then gets translated back to IPv6).


> An expert info error can then be displayed where appropriate.
> e) It would do away with the hack (?) used for the AH dissector (I
> think, I haven't looked very closely yet here).
>
> Arguments against:
> ?)
>
> Would anyone object to this proposal?
>
> Thanks!
>
> João V.
>
> [1]https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=10705