According to "http://www.asipto.com/pub/kamailio-devel-guide/#c02message_processing" all replies comes to on_reply and if it is negative reply it will be processed in failure_route after onreply_route.
But that is not the point i tried failure_route too.

append_hf works great for forwarded replies. But as i understand when kamailio receives final 503 reply it sends 500 reply generated by "build_res_buf_from_sip_req" (it is part of tm code, not dialplan function).

Thanks for your tries to help.

Well 5xx error codes are processed in failure_route and not onreply_route. Not sure though if you can append_hf there.. Give it a try.

FYI, for using a function in event_route (seems not possible for append_hf):

event_route[tm:local-request] {
  ...
  append_hf(...);
  ...
}


Reda

On 26 avr. 2012, at 18:10, Vitaliy Aleksandrov <vitalik.voip@gmail.com> wrote:

I have tried to use "append_hf" in onreply_route.
How can i use it in local-request ? According to documentation it can be used from REQUEST_ROUTE, ONREPLY_ROUTE, FAILURE_ROUTE, BRANCH_ROUTE.

Sorry forgot to mention that kamailio version is 3.0.2, but i have looked at t_repy.c (tm module from 3.2) and didn't find any changes which can help me.

Hi,

In which route did you try append_hf ?
"event_route[tm:local-request]" is the route executed for locally generated requests, I think you should be trying to modify it there.

Reda



On Thu, Apr 26, 2012 at 16:10, Vitaliy Aleksandrov <vitalik.voip@gmail.com> wrote:
Hi all,

I have Kamailio connected to PSTN gateway.

Sometimes gateway replies with "503 temporary unavailable". PSTN gateway adds a "reason" header with ISUP code.
But according to RFC 3261 kamailio doesn't forward 503 replies transparently. When 503 reply is received Kamailio replaces 503 with a 500 which is created from original request (build_res_buf_from_sip_req).
I have tried append_hf from textops module, but it's not working with a locally generated replies.

How can i copy Reason header from 503 to 500 ?


I will appreciate your help with this situation.

Best regards,
   Vitaliy Aleksandrov.


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