[Users] Adding headers to the CANCEL messages generated by openser

Bogdan-Andrei Iancu bogdan at voice-system.ro
Wed Apr 18 10:51:07 CEST 2007

Hi Ardjan,

you cannot do this as the CANCEL is automatically internally generated 
and you do not have any access to it.


Ardjan Zwartjes wrote:
> Hello openser users,
> I'm trying to do something with openser but I haven't been able to
> figure out how to do this. So I hope somebody on the list knows the
> answer: 
> In my configuration script I use append_hf to add application data to
> the SIP messages, this works great until the moment where I do a
> parallel branch. The invites work just fine since I can do the append_hf
> in the branch_route. The problem arises when one of the branches is
> answered, at this point OpenSER will generate CANCEL messages for the
> other branches and I have no clue on how to add header fields with
> information about the original invite to those messages. 
> So my question is: Does somebody know how you can add headers with data
> to the CANCEL messages generated by SER in a parallel branch? Thanks in
> advance.
> Kind regards,
> Ardjan Zwartjes.
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