I just did this quick POC test which worked as expected, it added a single RR with public advertised and double RR with both public and private advertise for the branch that routes to a private interface.

Prerequisites:

mhomed=1
modparam("rr", "enable_double_rr", 1)
listen=YOUR_PUB_IP advertise "your_private_fqdn"
listen=YOUR_PRIV_IP advertise "your_priv_fqdn"
10.22.0.0/24 is the private net

Script:

request_route {
record_route();
seturi("sip:a@google.com");
append_branch("sip:b@10.22.0.1", "1.0");
t_relay();
}

Give it a try.

On Thu, Jun 16, 2022 at 10:36 AM Sergiu Pojoga <pojogas@gmail.com> wrote:

Have you tried just record_route() with enable_double_rr option enabled? All things considered, RR should take care of it all by itself, per branch.

A script snippet could help.

On Thu, Jun 16, 2022 at 10:05 AM Patrick Karton <patrickarton@hotmail.com> wrote:

It only work for request route.

Le 16 juin 2022 14:19, Ilie Soltanici <iliusha.md@gmail.com> a écrit :

Hello,

Thank you, added it now - still the same, unfortunately.

Regards,

On Thu, 16 Jun 2022 at 13:29, Sergiu Pojoga <pojogas@gmail.com> wrote:

Have you tried calling t_save_lumps() before relaying, even before RR?

On Thu, Jun 16, 2022 at 7:59 AM Ilie Soltanici <iliusha.md@gmail.com> wrote:

Hello,

Is there any way to advertise a different IP Address in the Record-Route header individually per branch?

I have a setup here - where Kamailio is listening on 2 different interfaces: Local IP and External IP. At the moment if the packet is coming through the internal interface - I'm checking where is it going to and based on that I'm setting the Record-Route header accordingly - and everything works well, except when I have multiple branches: one going through the internal interface and another one through the external one, so in this case, I have to add a different record-route header per branch, by doing this in the branch_route - it's not working and getting the error: w_record_route_advertised_address(): Double attempt to record-route.

What would be another way to accomplish this?

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