[Serusers] SER Nokia CANCEL Problem

[Bogdan Pintea]

Jiri Kuthan wrote:
> It appears that there are two things mixed together. The 100 is sent upstream
> whereas the problem appears downstream. Not sending 100 downstream doesn't
> solve the race conditions located downstream.
>   
> The problem is that SER doesn't delay sending the CANCEL, it just gives up
> on it. 

As a side observation regarding to protocol's fault tolerance / race 
prone, it would seem there's no way for a stateful proxy to let a callee 
(1) whose provisional reply got lost (or not sent, in the first place, 
as provisionals is a MUST only for stateful proxies), but (2) whose 
final answer was received, about the fact that the call was canceled in 
the meantime, even though the proxy has the clear picture - and the only 
one that can have it - at the moment it sees the final reply from 
callee; (callee which will, however, time out, eventually, waiting for 
the ACK).

Bogdan.

> The issues is being bug-tracked now, there is no ETA yet.
>
> Thank you for reporting!
>
> -jiri
>
>   
>>> Is there any way I can stop 100 Trying message and still run statefull SER,
>>> so that I can verify what nokia said. Any ideas suggestions are welcome.
>>>
>>> Thanking you all in advance.
>>>
>>> Best Regards,
>>> Abdul Qadir
>>>
>>>
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>
>
>
> --
> Jiri Kuthan            http://iptel.org/~jiri/
>
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>   


-- 
Bogdan Pintea

iptego GmbH  -  VoIP Security
http://www.iptego.de