[Devel] uac-Module CSeq

Bogdan-Andrei Iancu bogdan at voice-system.ro
Fri Apr 7 12:09:11 CEST 2006


Hi Thorsten,

there is no cseq management in openser since there is no dialog support 
and cseq id dialog-specific info.

regards,
bogdan

Thorsten Müller wrote:

>Hi Klaus and list
>
>thanks for the response.
>AFAIK (open)ser is dialog stateless but transaction
>statefull.
>The second INVITE begins a second transaction with an
>--to follow RFC 3261-- increased cseq. Where is the
>information in (open)ser for the following
>transaction. Is there a place in (open)ser where the
>cseg is stored for a dialog? How is the management of
>cseg done in (open)ser.
>
>Regards 
>
>Thorsten
>
>mt> -----Ursprüngliche Nachricht-----
>mt> Von: Klaus Darilion
>[mailto:klaus.mailinglists at pernau.at]
>mt> Gesendet: Mittwoch, 8. März 2006 19:50
>mt> An: Thomas Müller
>mt> Cc: devel at openser.org
>mt> Betreff: Re: [Devel] uac-Module CSeq
>mt> 
>mt> 
>mt> On Wed, March 8, 2006 17:25, Thomas Müller said:
>mt> > Hi list,
>mt> >
>mt> > I tried to authenticate openser at Asterisk and
>run
>mt> > into the cseq-error. (Asterisk is hard
>RFC-konform and
>mt> > ignores the second INVITE with the same cseq;
>mt> > uac-module is not increasing it - as mentioned
>in the
>mt> > docu).
>mt> >
>mt> > Where is the problem increasing the cseq - I
>think it
>mt> > is not to add 1 to an integer-value (even if
>stored as
>mt> > struct str_) but there should be s.th. more.
>mt> > Where is the trap to fall in? To give the
>following
>mt> > transactions the right increased cseq?
>mt> 
>mt> Yes. (open)ser is stateless. Openser would have to
>increase 
>mt> the cseq also
>mt> in all further transaction, for which openser
>would have to 
>mt> be dialog
>mt> staeful.
>mt> 
>mt> a workaround:
>mt> decrease the Cseq for the first INVITE. This works
>only for 
>mt> the first
>mt> INVITE and will break if in-dialog requests are
>challenged.
>mt> 
>mt> regards
>mt> klaus
>mt> 
>mt> 
>
>
>	
>
>	
>		
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