[SR-Users] How reply INVITE request with 200 OK that contains SDP?

[Daniel-Constantin Mierla]

Hello,

afaik, rtpengine is suitable when using Kamailio in proxy mode,
forwarding the INVITE, not sending 200ok from it.

Maybe you should look at rtp_media_server module for building an
announcement server:

  *
https://www.kamailio.org/docs/modules/devel/modules/rtp_media_server.html

It is only in master branch, not in a stable release, but maybe you can
just copy and paste it in an older branch clone tree.

Otherwise, iirc, there is a variable that you can get the sdp returned
by rtpengine and you can add it to the reply generated by kamailio. If
not, do msg_apply_changes() and get the new body with $rb variable and
append it to reply with the function from textops module.

Cheers,
Daniel

On 11.06.19 16:36, Ali Shirvani wrote:
> Hi all,
>
> I tried to implement simple announcer by using play_media function in
> latest rtpengine module. I implemented simple Lua script and I tried
> to test the implementation with simple SIPp scenario.
>
> Here is the Lua function to reply the received INVITE request.
>
> ```Lua
> function ksr_route_announcer()
>     KSR.info("======= Announcer =====\n");
>     local u = KSR.pv.gete("$rU");
>     KSR.info("username is: " .. u .. "\n");
>     if u == "ann" then
>          KSR.info("announcer has been called.\n");
>          if KSR.textops.has_body_type("application/sdp") then
>               KSR.info("request contains SDP.\n");
>               KSR.tm.t_newtran();
>               KSR.rtpengine.rtpengine_manage0();
>               KSR.tm.t_reply(200, "OK");
>               KSR.x.exit();
>          end
>     end
> end
>
> ```
>
> According to kamailio logs rtpengine modified the INVITE SDP, but I
> want to add SDP to 200 OK response. How should I manage rtpengine to
> append SDP answer to the 200 OK response?
>
> The attached is the SIPp log, as you can see that last 200 OK doesn't
> contain SDP.
>
> Regards,
> Ali
>
> _______________________________________________
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> sr-users at lists.kamailio.org
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-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda

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