[SR-Users] Manipulate sip header on an in-dialog negative reply

[Olli Attila]

Hello,

Any ideas about this header manipulation?

Cheers,
Olli

pe 14. jouluk. 2018 klo 12.31 Olli Attila (attiolli at gmail.com) kirjoitti:
>
> Hello,
>
> We have a call case where our softswitch replies to in-dialog
> re-invite with "SIP 491 Request pending". This happens when a customer
> sip device is trying to re-invite the session too fast even though the
> softswitch is still processing the earlier request. Kamailio operates
> between this customer device and the softswitch.
>
> The softswitch is adding a P-Charging-Vector header to this SIP 491
> reply which we want to drop (remove_hf...)  from the reply when we
> route the SIP 491 message  back to the customers device.
>
> I tried to drop this inside in-dialog failure route but it seems that
> Kamailio forwards the orginal 491 message statelessly to customer and
> the header still extists there eventhough failure route has deleted
> it. I guess this modification should be done in a sateful manner for
> Kamailio to actually write the changes to the outgoing reply towards
> the customer device.
>
> Any suggestions how the 491 reply could be edited and then forwarded
> onwards to the customer device?
>
> Cheers,
> --Olli



-- 
"Logic is the art of going wrong with confidence."