[Serusers] SER Nokia CANCEL Problem

samuel samu60 at gmail.com
Fri Feb 16 13:51:01 CET 2007


That's a race condition in SER solved in newer versions.

I observed always this behaviour and new versions properly matches
CANCEL with INVITE transaction and the "sipiral" (ending in Too Many
Hops) does not occur.

Samuel.

2007/2/16, Abdul Qadir <ablqadir at yahoo.com>:
> Hi,
>
> >I think ser should remember canceled transactions and send CANCEL in
> >case of delayed provisional replies.
>
> At present I don't think its working like this, As soon as CANCEL hit SER an
> immediate too many hops is returned to sender and call
> continues....resulting in ghost call, where A party has dropped after
> sending cancel and B still carries on as no cancel was sent to B.
>
> Best Regards,
> Abdul Qadir
>
>
> Klaus Darilion <klaus.mailinglists at pernau.at> wrote:
>  Abdul Qadir wrote:
> > Hi ,
> >
> > I tried to call from one nokia sip (E61 and other models )phone to another
> nokia sip phone. The call works fine. The problem comes only when I call
> from Phone A to Phone B and then immediately cancel the call(from Phone A).
> The Phone A will hangup the call as it sent CANCEL but the SER will ignore
> this CANCEL and still send INVITE to Phone B resulting in a ghost call
> situation.
> >
>
> Hi!
>
> I think ser should remember canceled transactions and send CANCEL in
> case of delayed provisional replies.
>
> regards
> klasu
>
> > I tried to capture a log of message and found that Phone A "CANCEL"
> message is received on SER even before any provisional response from Phone
> B. Therefor SER doesnot relay this CANCEL request to Phone B. I even checked
> RFC which clearly says that UAC should not send CANCEL untill it receives
> any provisional response. I talked to Nokia expert and they said the 100
> Trying message from your server is considered as provisional response,
> therefor behaviour of client is absolutely correct.
> >
> > 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
> >
> >
> > ---------------------------------
> > Don't be flakey. Get Yahoo! Mail for Mobile and
> > always stay connected to friends.
> >
> >
> >
> ------------------------------------------------------------------------
> >
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>
>
> --
> Klaus Darilion
> nic.at
>
>
>
>
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