[SR-Users] Manually add Via Header

[Vassilis Radis]

Thanks a lot, it worked.

On Thu, Oct 25, 2012 at 1:03 PM, Daniel-Constantin Mierla <miconda at gmail.com
> wrote:

>  You better use t_reply("487", "Cancelled") in a failure_route.
>
> Adding a proper Via header might be a tricky task.
>
> Cheers,
> Daniel
>
>
> On 10/25/12 11:43 AM, Vassilis Radis wrote:
>
> I have a situation where a far end SIP provider doesn't behave properly
> when sending 487 replies. The scenario is this:
>
>  I have a registered user calling into my kamailio which ,using lcr
> module, routes the call to a SIP provider. When the caller Cancels the
> call, my kamailio forwards the cancel message to the provider (along with a
> 200 Cancelling message to the caller). The problem is with the 487 sent by
> the provider to my kamailio: It does not contain all the two Via headers.
> It only contains the via header that names my kamailio. So when kamailio
> gets the 487, it removes its Via header and sends the 487 back to the
> caller, which now doesnt find any via header.
>
>  Note that the far end provider, correctly sends all the Via Headers in
> other replies (183 etc).
>
>  So now I am trying to "intercept" the 487 from this specific provider in
> the onreply route, and patch it with the header that the provider should
> have included. How can I do it? The problem is twofold:
> 1.I need to detect which header I should manually add (maybe store the Via
> Header set from the initial invites or the 183 replies, and get it from
> there? .I dont know how to do that)
> 2.I need to add it. (How can I manually add a Via header? .This seems
> easier
>
>  Can anyone help me, maybe with another solution?
>
>
> _______________________________________________
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>
>
> --
> Daniel-Constantin Mierla - http://www.asipto.comhttp://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
> Kamailio Advanced Training, Berlin, Nov 5-8, 2012 - http://asipto.com/u/kat
> Kamailio Advanced Training, Miami, USA, Nov 12-14, 2012 - http://asipto.com/u/katu
>
>
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