Looping should be avoided by checking the X-FS-Sending-Message header. Still, changing the Call-ID may present another set of issues.
Is it possible to read the Call-ID from the chatplan, in the similar manner how it's done in dialplan, other than parsing it from SIP trace?

Thank you for response,
Marko

> -----Original Message-----
> From: Sergey Safarov [mailto:s.safarov@gmail.com]
> Sent: Tuesday, November 14, 2017 4:24 PM
> To: FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org>
> Subject: Re: [Freeswitch-users] mod_sms chat messages delivery notification
>
> My experiance say that Call-ID change is required to prevent message loops.
> Looks like need to use other header or field to correlate messages.
>
>
> вт, 14 нояб. 2017 г., 13:44 Marko Djuric <Marko.Djuric@amphinicy.com
> <mailto:Marko.Djuric@amphinicy.com> >:
>
>
>       Hi all,
>
>       We're using mod_sms for SIP SIMPLE messaging with delivery
> notifications
>       (message/imdn+xml).
>       The Call-ID is changed in the chatplan, and this causes issues with
> matching
>       the delivery notifications to the original message.
>
>       Changing the Call-ID itself is not an issue, but I'm wondering if it is
>       possible to read the original Call-ID and/or manually set the Call-ID in
> the
>       chatplan.
>
>       The message:getHeader("sip_call_id") does not contain the Call-ID. My
>       understanding is that this is due to skip_global_process=false variable
> set
>       by mod_sms.
>       Setting the sip_call_id variable also does not produce a desired effect,
> as
>       it is added as another header instead of setting the Call-ID one.
>
>       The question is - how to match the messages before and after the
> chatplan?
>
>       Any help is appreciated.
>
>       Thank you!
>       Marko
>
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