[Kamailio-Devel] [OpenSIPS-Devel] presence and pua_bla module question

[Anca Vamanu]

Hi Klaus,

Indeed the way the presentity uri is build for event dialog is related 
to the BLA implementation and the draft.
I had the same difficulty when I first read the draft. It is strange how 
they populate the headers. You might call it a bug in the draft. The 
fact is that with the current implementation, taking the username from 
the contact, BLA works with Polycom phones which implement this feature( 
with dialog;sla) and follow the draft exactly. It might be against all 
logic, but in the end interoperability is what matters.
Now, to solve this breaking of dialog event usage, I think also that a 
change should be made in the parser to separate the dialog and the bla 
event ( dialog;sla).  I could take care of that.

regards,
Anca

Klaus Darilion wrote:
> Hi!
>
> Sorry for crossposting, but I want to reach all developers which have 
> knowledge of these modules.
>
> I just wrote a small module which registers the "dialog" event package 
> and somehow it did not worked. After some time I found out that for 
> incoming SUBSCRIBEs with Event: dialog the presence module does build 
> the pres-URI from the username from the Contact header from the 
> SUBSCRIBE. Why? Is this related to the BLA implementation?
>
> I read the BLA-draft now 3 times and I still do not understand it 
> completely - in the example in section 6.1.2 in F13 Bob uses "Alice" as 
> username in the contact. Is this the reason why the presentity is built 
> from the Contact-username? If this is really the case then IMO this is a 
> bug in the draft and against all logic. Further it breaks usage of 
> dialog event without "bla" extension. In this case maybe event-header 
> parser and presence module should be extended to check if the dialog 
> event has the ";bla" parameter and build the pres-URI only in this case 
> from the SUBSCRIBEs Contact username.
>
> Or am I completely wrong?
>
> regards
> klaus
>
> _______________________________________________
> Devel mailing list
> Devel at lists.opensips.org
> http://lists.opensips.org/cgi-bin/mailman/listinfo/devel
>
>