Hello.
We faced an issue that $T_branch_idx called from failure_route returned a strange result.
Few words about our setup. We use branch indexes like key in avp when we store via-branch value for rtpengine.
route[RTPMANAGE] ... if ( is_request() and is_method("INVITE") and !has_totag() and t_is_branch_route() ) { $avp(viabranch$T_branch_idx) = $branch_str; } $avp(extra_branch_id) = $avp(viabranch$T_branch_idx); $var(rtpkey) = $var(rtpkey) + " via-branch=extra"; ...... rtpengine_manage($var(rtpkey));
Call this route in branch_route and in failure_route. In branch_route T_branch_idx is 0, in failure_route is 1.
In documentation: the index (starting with 1 for the first branch) of the branch for which is executed the branch_route[]. If used outside of branch_route[] block, the value is '0'.
But in source code behavior is different. (modules/tmx/t_var.c:480): for BRANCH_FAILURE_ROUTE and BRANCH_ROUTE it is idx = tcx->branch_index, but for FAILURE_ROUTE it is idx = t->nr_of_outgoings + nr_branches;
Can you describe why for failure_route it is different and what we can do in our case? And can you update documentation for this variable if it is wrong?
Hello,
indeed, the docs for it were outdated, the code evolved and the docs were not updated. I tried to bring them correlated with the code, hope I haven't missed anything in the code:
* https://www.kamailio.org/wiki/cookbooks/devel/pseudovariables#t_branch_idx
Cheers, Daniel
On 24.03.21 17:35, Victor Litvinov wrote:
Hello.
We faced an issue that $T_branch_idx called from failure_route returned a strange result.
Few words about our setup. We use branch indexes like key in avp when we store via-branch value for rtpengine.
route[RTPMANAGE] ... if ( is_request() and is_method("INVITE") and !has_totag() and t_is_branch_route() ) { $avp(viabranch$T_branch_idx) = $branch_str; } $avp(extra_branch_id) = $avp(viabranch$T_branch_idx); $var(rtpkey) = $var(rtpkey) + " via-branch=extra"; ...... rtpengine_manage($var(rtpkey));
Call this route in branch_route and in failure_route. In branch_route T_branch_idx is 0, in failure_route is 1.
In documentation: the index (starting with 1 for the first branch) of the branch for which is executed the branch_route[]. If used outside of branch_route[] block, the value is '0'.
But in source code behavior is different. (modules/tmx/t_var.c:480): for BRANCH_FAILURE_ROUTE and BRANCH_ROUTE it is idx = tcx->branch_index, but for FAILURE_ROUTE it is idx = t->nr_of_outgoings + nr_branches;
Can you describe why for failure_route it is different and what we can do in our case? And can you update documentation for this variable if it is wrong?
Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
-
Daniel-Constantin Mierla -
Victor Litvinov