Hi David,
Kamailio is a proxy, so it cannot endogenously originate either requests or most replies. A 200 OK to an INVITE transaction can only come from a user agent (endpoint), and Kamailio's sole job is to forward it. So, the 200 OK is going to come from the auto-answering callee.
To engage RTPEngine in both directions, you need to intercept the 200 OK that is generated from the callee and call rtpengine_answer() / rtpengine_manage() on it:
--- route { ...
if(is_method("INVITE")) { ...
rtpengine_offer("...");
t_on_reply("REPLY");
if(!t_relay()) sl_reply_error();
exit; }
... }
onreply_route[REPLY] { if(is_method("INVITE") && sdp_content()) rtpengine_answer("..."); } ---
-- Alex
On Mon, Apr 15, 2019 at 07:41:22PM +0000, David Dean wrote:
Hi all, I'm building an automated load testing system for an rtp media server with TURN that uses Kamailio for SIP. When a client sends an INVITE to Kamailio, I need Kamailio to respond with "200 OK" and the SDP generated by rtpengine. I've enabled auto-answer in the client, so as soon as it receives the response from Kamailio it will start sending RTP packets. Right now I'm using send_reply("200", "OK"); which is sending the right 200 response back to the client, but it doesn't include any body. How can I get Kamailio to send a "200 OK" and add the rtpengine_answer into the body? Appreciate any help, I've been struggling with this for three days. Cheers.
rtpengine_offer("SIP-source-address ICE=force-relay RTP");send_reply("200", "OK");
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