[SR-Users] branch_route not called on DNS failover

[Daniel-Constantin Mierla]

>From config processing point of view, there is only one branch set for
going out to the target domain.


If the dns query returns more than one address, that's not due to config
operations adding the branches, thus branch route is not executed.
Logically, it is a single target, it is supposed to be the "same" system
from kamailio routing point of view.


Obviously, it is open source and one can code new feature and add an
option to execute config routing blocks on various cases, including on
dns-based re-routing. But as it was designed in the past, branch_route
is executed only on branches resulted from config processing, not from
dns query.


As you could notice, in the branch route the r-uri has the domain in its
value, the dns is done later, when about to send to the network.


But then, there is onsend_route executed after dns is done, but there is
no option to change the message anymore.


Cheers,
Daniel


On 02.07.22 00:03, Patrick Karton wrote:
> Thanks for reply but its not possible to set branch_route in
> failover_route for dns failover.
>
> the branch is sent before the failure_route.
>
> i will keep reparse_on_dns_failover to 1 that solves partially .
> ------------------------------------------------------------------------
> *De :* sr-users <sr-users-bounces at lists.kamailio.org> de la part de
> Alex Balashov <abalashov at evaristesys.com>
> *Envoyé :* vendredi 1 juillet 2022 20:01
> *À :* Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
> *Objet :* Re: [SR-Users] branch_route not called on DNS failover
>  
>
> > On Jul 1, 2022, at 10:23 AM, Patrick Karton
> <patrickarton at hotmail.com> wrote:
> >
> > do i need again to set branch_route in failure_route ?
> >
>
> Short answer: yes.
>
> -- 
> Alex Balashov | Principal | Evariste Systems LLC
>
> Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
>
>
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-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
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