Re: [Ethereal-dev] new dissector: SCCP

[Jeff Morriss <jeff.morriss@xxxxxxxxxxx>]

Michael,

> this means that we have both important MTP users available in
> Ethereal, that is great.

Agreed.  Of course, porting the ISUP dissector to ANSI is
a-whole-nother-problem, but...  ITU users should be pretty happy for
now.  :)

> I would suggest not to rely on te the MTP3 dissector for the
> ITU/ANSI decission, because if we use M3UA/SCTP for the transport
> NO MTP3 is involved anymore. This means that a use would have
> to set MTP3 preferences even this protocol is not involved in the stack.

Hmmm...  I must admit I am not as familiar with M3UA as I should be.  I
had thought that M3UA called MTP3 for protocol payloads, but in looking
now I note that it only does so in certain cases (DATA_1 and DATA_2). 
Oh well...

However, I don't really like the idea of having, for example, the same
(but separate) protocol preference in MTP3, SCCP, and ISUP (maybe also
L3MTP-MG, SCCP-MG, and TCAP if someone gets really bored?).  I tend to
work in both protocols (okay, also Chinese SS7 and several of the
Japanese variants) and I wouldn't want switching between them to be a
royal pain...

What about having the preference stored in MTP3 but the preference show
up in each protocol?  I guess that's easy enough...  I'll see how that
works and submit a patch unless anyone has an objection.

Regards,
-Jeff

> > Hello list,
> >
> > As promised long, long ago, here's my SCCP dissector.  It does both ITU
> > and ANSI formats (it picks up the preference from the MTP3 dissector).
> > The MTP3 patch is diff'd against CVS.
> >
> > Enjoy,
> > -Jeff

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