[SR-Users] Record-route issue in Kamailio 3.0.3

Ovidiu Sas osas at voipembedded.com
Thu Oct 14 17:06:19 CEST 2010


As long as the order of the Record-route headers is preserved,
multiple Record-Route headers can be compacted into a single header
and kamailio is able to deal with it.
Please post a trace of a call exposing the issue.

Regards,
Ovidiu Sas

On Thu, Oct 14, 2010 at 10:40 AM, Morten Isaksen <misak at misak.dk> wrote:
> Hi,
>
> I think I have found a issue with recourd-route in Kamailio 3.0.3.
>
> My old setup was:
>
> Microsoft OCS <--> (TCP) OpenSER (UDP) <---> (UDP) Mediant 2000 (ISDN).
>
> That worked fine.
>
> Now I have inserted a new server in this setup.
>
> Microsoft OCS <--> (TCP) OpenSER (UDP) <---> (UDP) Kamailio (UDP) <-->
> (UDP) Mediant 2000 (ISDN).
>
> When OpenSer sends the message to Kamailio the recourd-routes look like this:
>
> Record-Route: <sip:x.x.248.20;r2=on;lr;ftag=3d9e7d131b>
> Record-Route: <sip:x.x.248.20;transport=tcp;r2=on;lr;ftag=3d9e7d131b>
>
> But when the message comes back from Kamailio it is:
> Record-Route: <sip:x.x.248.7;lr=on;ftag=3d9e7d131b;did=584.1a683a45>,<sip:x.x.248.20;r2=on;lr;ftag=3d9e7d131b>,<sip:x.x.248.20;transport=tcp;r2=on;lr;ftag=3d9e7d131b>
>
> OpenSER forwards the message to the OCS with Record-route unchanged
> and the OCS gets confused and does not reply.
>
> I am not that strong in the SIP RFC's. Is it part of the SIP standard
> to compact the record-route into one line?
>
> Is it a bug in Kamailio or is it just a parameter that needs to be changed?
>
> Any help will be much appreciated.
>
> --
> Morten Isaksen
>
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