Hello,

this might be a bug in the tmx module function, according to the docs it should work for all branches.

Please open an issue on our github tracker about it, with the details for reproducing it.

Cheers,

Henning

--

Henning Westerholt – https://skalatan.de/blog/

Kamailio services – https://gilawa.com

From: sr-users <sr-users-bounces@lists.kamailio.org> On Behalf Of Pavel Veselovsky
Sent: Tuesday, June 7, 2022 6:49 AM
To: sr-users@lists.kamailio.org
Subject: [SR-Users] t_cancel_callid - doesn't insert Reason header, if called from branch 0

Hallo

so far I have no reaction on my question.

Has anybody similar experience that  t_cancel_callid() doesn't insert Reason header, if called from branch 0?

What are differences between branch 0 and other branches?

Regards.

Pavel.

On Fri, Jun 3, 2022 at 3:17 PM Pavel Veselovsky <pavel.veselovsky@gmail.com> wrote:

Hallo all, 

I defined  branch_failure routing  block via t_on_branch_failure()

In the branch_failure route, in case of "408 Request timeout" I am sending CANCEL with reason "t_cancel_callid("$ci", "$cs", "22", "408")".

If the t_cancel_callid("$ci", "$cs", "22", "408") is called in  branch_failure for branch idx 0, the CANCEL is sent, but Reason header is missing there.

Why?  (I expect that t_cancel_callid() should insert Reason header regardless of branch it is called from)

If the t_cancel_callid is called in branch idx !=0, the CANCEL contains Reason header with cause as expected.

Thanks for clarification of this behavior, 

Pavel.  

P.S. code snipset:

event_route[tm:branch-failure:primary]

{

 if ($T(reply_code) == "408")

    {
        if ($avp(branch_idx) == $T_branch_idx)
        {
            if (t_cancel_callid("$ci", "$cs", "22", "408"))
            {
                xlog("L_INFO", "CANCEL sent ci:$ci, cs:$cs 408");    
            }
            else
            {
                xlog("L_INFO", "CANCEL not sent ... ci:$ci, cs:$cs 408");
            }

            $var(_palotmp_) = "sip:" + $avp(replaced_cfnry_target_number) + "@" + $dd + ":" + $dp + ";user=phone";            
            append_branch($var(_palotmp_),"1.0");

            t_relay();
            return;
        }
    }

}