rtpengine rewrite sdp for second time - sr-users

18 Aug 2015

      Hi Carsten,
Thanks for your reply!
How can I call msg_apply_changes() in right way? If I call
msg_apply_changes() for example in route[RELAY] i get error:
ERROR: textopsx [textopsx.c:157]: msg_apply_changes_f(): invalid usage -
not in request route
if I do everything as you suggested in onreply_route (after I get for
example SIP 500 message) it doesn't work and my SDP remains unchanged.
Thanks!
...
*From: *Carsten Bock carsten@ng-voice.com
*Subject: **Re: [SR-Users] rtpengine rewrite sdp for second time*
*Date: *17 Aug 2015 09:49:12 EEST
*To: *"Kamailio (SER) - Users Mailing List" <sr-users@lists.sip-router.org
...
*Reply-To: *"Kamailio (SER) - Users Mailing List" <
sr-users@lists.sip-router.org>
Hi Virmantas,
you could try to one or a combination of the following:

explicitly delete the first session by calling rtpengine_manage() in

the failure route

call msg_apply_changes() from Textops before calling

rtpengine_manage() the second time (so the already made changes are
applied and the message gets reparsed)
Thanks,
Carsten
2015-08-16 20:13 GMT+02:00 Virmantas Variakojis
virmantas.variakojis@gmail.com:
Hi,
I have a situation like this:
I have kamailio with 3 NIC's. I'm sending INVITE to first provider over
NIC1. Before sending INVITE I use rtpengine_manage to rewrite sdp body with
IP that is on NIC1:
rtpengine_manage ("replace-origin replace-session-connection
direction=intvlan direction=prov1 ICE=remove");
If first provider fails i want to send INVITE for the same call to second
provider. But if i use like this:
rtpengine_manage ("replace-origin replace-session-connection
direction=intvlan direction=prov2 ICE=remove");
or (because ip of prov1 is allready set):
rtpengine_manage ("replace-origin replace-session-connection
direction=prov1
direction=prov2 ICE=remove");
rtpengine ignores my changes as said in documentation: "The direction must
only be specified in for initial SDP offer; answers or subsequent offers
can
omit this option."
and if I try to set ip like this:
rtpengine_manage ("replace-origin replace-session-connection
media-address=X.X.X.X ICE=remove");
SDP body is doubled: it leaves old values and adds the new one.
What i'm doing wrong or how can I rewrite SDP for second time? Thanks in
advance for answer!

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