[OpenSIPS-Users] - topology_hiding and no ACK

[Nitesh Divecha]

Hey Bogdan-Andrei,

Thanks for your feedback.

To be honest - I don't know!

I followed some online tutorials and tried to implement "topology_hiding()"
after is_method("INVITE") since the first message sent to Outbound Provider
is INVITE.

I never tried topology_hiding_match().

What is the right way to implement topology_hiding module? My scenario is
simple, I'm using the default cfg and making ATA register to OpenSIPS to
make Outbound PSTN calls.

I guess Bootcamp is the answer :-)

Cheers,
Nitesh


On Thu, Oct 27, 2022 at 4:02 AM Bogdan-Andrei Iancu <bogdan at opensips.org>
wrote:

> Hi Nitesh,
>
> Do you do topology_hiding_match() for the sequential requests (instead of
> the typical loose_route()) ?  As it seems you cfg fails to properly handle
> the in-dialog / sequential requests.
>
> Regards,
>
> Bogdan-Andrei Iancu
>
> OpenSIPS Founder and Developer
>   https://www.opensips-solutions.com
> OpenSIPS Bootcamp 5-16 Dec 2022, online
>   https://www.opensips.org/training/OpenSIPS_eBootcamp_2022/
>
> On 10/26/22 9:05 PM, Nitesh Divecha wrote:
>
> Hello All,
>
> I don't know if this is by design or me not implementing correctly! I'm a
> newbie to OpenSIPS...
>
> So I generated a new opensips_residential.cfg file and only edited it
> with topology_hiding("UC"); under INVITE. Plus all the extras to make ATA
> register successfully and SIP trunk.
>
> Every time I make a call two INVITE dialogs are created. One from ATA to
> OpenSIPS and second one from OpenSIPS to Outbound Provider. When a PSTN
> call is answered, the Outbound Provider sends 200 OK back to OpenSIPS, and
> OpenSIPS sends back 200 OK to ATA. Then ATA acknowledges with ACK back to
> OpenSIPS BUT OpenSIPS fails to send ACK to the Outbound Provider. So
> Outbound Provider sends 200 OK again to OpenSIPS and OpenSIPS sends 200 OK
> to ATA then ATA acknowledges with ACK back to OpenSIPS BUT OpenSIPS fails
> to send back ACK... This dance goes on for 30 secs and until Outbound
> Provider drops the call due to no ACK.
>
> On the sngrep it shows that call from ATA to OpenSIPS "COMPLETED" while
> OpenSIPS to Outbound Provider "CALL SETUP".
>
> If I comment out topology_hiding("UC"); then everything works perfectly
> and sngrep shows only one INVITE dialog from ATA to OpenSIPS to Outbound
> Provider except the Outbound Provider can see everything that is ATA's IP
> info, etc...
>
> Here is my cfg:
>
> route {
> ...
> if (dp_translate(10 ,$rU ,$rU) ) {
>                 xlog("*** Dial plan translate from source $avp(src) to $rU
> ***\n");
>
>                 $avp(furi) = "sip:xxxxxxxxxx at gothamcity.com";
>                 uac_replace_from( , "$avp(furi)");
>                 #strip(1);
>                 if (!do_routing(0)) {
>                         send_reply(500,"No PSTN Route found");
>                         exit;
>                 }
>                 # t_on_branch("change_from");
>                 route(relay);
>                 exit;
>         }
> ...
> }
>
> route[relay] {
>         # for INVITEs enable some additional helper routes
>         if (is_method("INVITE")) {
>                 # create_dialog();
>                 topology_hiding("UC");
>                 if(remove_hf("User-Agent")){
>                         xlog("*** 4. User-Agent found and removed. ***\n");
>                 }
>
>                 if (isflagset("NAT") && has_body("application/sdp")) {
>                         rtpproxy_offer("ro");
>                 }
>
>                 t_on_branch("per_branch_ops");
>                 t_on_reply("handle_nat");
>                 t_on_failure("missed_call");
>         }
>
>         if (isflagset("NAT")) {
>                 add_rr_param(";nat=yes");
>         }
>
>         if (!t_relay()) {
>                 send_reply(500,"Internal Error");
>         }
>         exit;
> }
>
> My eyes are sore and my head is spinning... Any help will be highly
> appreciated... Thanks!
>
> Cheers,
> Nitesh
>
>
> _______________________________________________
> Users mailing listUsers at lists.opensips.orghttp://lists.opensips.org/cgi-bin/mailman/listinfo/users
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opensips.org/pipermail/users/attachments/20221027/4ee4474e/attachment-0001.html>