21 apr 2013 kl. 01:50 skrev אורן אברהם <oren.av....@gmail.com>:

> Dear List.
> 
> I'm trying to change the contact header of a message. ( by calliing 
> add_contact_alias - that shuld add the ;alias= parameter to the contact 
> header)
> but, when i print the contact header (with xlog), it shows no change.
> 
> I know the function works, and that it added the parameter as expected by 
> using debug mode. (it sais that it was added)
> 
> Can anyone explain me why i don't see that change in the xlog ? (i've printer 
> both $ct and $hdr(Contact))
> 

Kamailio keeps two buffers of the incoming message, one is a copy of the 
incoming and the other one
is the one where changes happen, a template for any outbound message used when 
forwarding
to the next hop.

If you change headers, they are changed in the outbound buffer, not the 
incoming. When you use
functions to check headers, you check the incoming buffer.

There is a function to apply changes to the inbound buffer that is needed 
sometimes, but very
few times. It can be quite confusing if you are not aware of how changes to 
messages are applied.

/O


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