[OpenSER-Users] append_branch and $T_branch_idx behavior

[Bogdan-Andrei Iancu]

Hi Ovidiu,

Let me share some of the dark corners of openser :) (not known for most 
of the people) :

$T_branch_idx counts the valid (outgoing) branches and not the branch 
attempts.

If you have 2 branch attempts and first is discarded, the second will 
take the index 1.

regards,
bogdan


Ovidiu Sas wrote:
> Hello,
>
>
> I was playing wit append_branch and I run into this issue.
>
> Here's a snippet of the code:
>
> route[2] {
>                 $var(uri) = $ru;
>                 append_branch();
>                 $ru = $var(uri) + ";transport=udp";
>                 t_on_branch("2");
> }
>
> branch_route[2] {
>         xlog("L_INFO", "entering branch[$T_branch_idx] for $ru\n");
>
>         if ($T_branch_idx == 1) {
>                xlog("L_INFO", "dropping branch[$T_branch_idx]\n");
>                drop();
>         }
> }
>
> In the logs, I got:
>
> entering branch[1] for sip:<user>@<IP>;transport=udp
> dropping branch[1]
> entering branch[1] for sip:<user>@<IP>
> dropping branch[1]
> ERROR:tm:t_forward_nonack: failure to add branches
>
>
>
> Is this the expected result?
> It seems that we do have two branches, since we enter twice in the
> branch_route, but the $T_branch_idx doesn't seem to be updated.  Or,
> it is supposed to be updated?
> Any hints would be appreciated.
> BTW: this is with 1.3 code base.
>
> Regards,
> Ovidiu Sas
>
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