[Serusers] e2e cancel - ghost calls

Nuno Ribeiro nribeiro82 at gmail.com
Thu Mar 6 10:54:30 CET 2008


The config file that I'm using is very simple and all the the messages
follow the same path, i.e. it should hit the t_relay_to_udp function. The
code that I have in the SER script is in my first message.

Thanks in advance.

Best Regards,




On Thu, Mar 6, 2008 at 9:21 AM, samuel <samu60 at gmail.com> wrote:

> Check whether CANCEL requests follow the same path as INIVTE requests in
> your SER config file. Probably they don't and the CANCEL does not hit the
> t_relay function responsible for forwarding the CANCEL to the right
> destination and it is discarded as SER acts statelessly.
>
> Hope it helps,
> Samuel.
>
> 2008/3/5, Nuno Ribeiro <nribeiro82 at gmail.com>:
> >
> >
> > Hi all,
> >
> > I'm having a problem related with the "early" CANCEL's. The scenario is
> > the following  one :
> > A PSTN call to a SIP phone. When the PSTN decides to cancel the call
> > only a right after initiating, the PSTN will send the CANCEL message to the
> > SER but this is discarded and not forwarded to the correct path to the SIP
> > Phone. So what happens is that we have a ghost call.... The PSTN has already
> > cancelled the call but the SIP phone continues to ring.
> >
> > The code that I have in the SER script is really simple:
> >
> > if(subst_uri('/^sip:(\+[0-9]+)@
> > 192.168.20.69.*user=phone$/sip:\1 at ptinovacao.pt/i')){<http://192.168.20.69.*user=phone$/sip:%5C1@ptinovacao.pt/i%27%29%29%7B>
> >
> >              record_route();
> >
> >              loose_route();
> >
> >              t_relay_to_udp("192.168.20.5", "5060");
> >
> >              break;
> >
> > }
> >
> > In the log file I see that:
> >
> > RFC3261 transaction matching failed
> >
> > t_lookup_request: no transaction found
> >
> > e2e_cancel: e2e cancel proceeding
> >
> > Could you help me?
> >
> > Thanks in advance.
> >
> > Best Regards,
> >
> > --
> > Nuno Ribeiro
> >
> > _______________________________________________
> > Serusers mailing list
> > Serusers at lists.iptel.org
> > http://lists.iptel.org/mailman/listinfo/serusers
> >
> >
>


-- 
Nuno Ribeiro
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