[SR-Users] SDP Codec not removed with RTPengine - but with rtpproxy it worked

[Oliver Roth]

Hi,

I guess it is after executing rtpengine_maange() – but not really sure.
How can I check that?

I get a different sdp header that is going out of the gateway

v=0
o=Dialogic_SDP 3975025 0 IN IP4 213.173.185.38
s=Dialogic-SIP
c=IN IP4 185.49.222.198
t=0 0
m=audio 20306 RTP/AVP 8 0 125 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:125 CLEARMODE/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=silenceSupp:off - - - -
a=sendrecv
a=rtcp:20307
a=ice-ufrag:UMTBynMy
a=ice-pwd:63JdnvLS7cMyCQ978BA6syPmiI
a=candidate:GUTMVOhP7VJyBkZg 1 UDP 2130706431 185.49.222.198 20306 typ host
a=candidate:GUTMVOhP7VJyBkZg 2 UDP 2130706430 185.49.222.198 20307 typ host

Incoming was

v=0
o=Dialogic_SDP 3975025 0 IN IP4 213.173.185.38
s=Dialogic-SIP
c=IN IP4 213.173.185.39
t=0 0
m=audio 9036 RTP/AVP 8 0 125 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:125 CLEARMODE/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=silenceSupp:off - - - -



Von: sr-users [mailto:sr-users-bounces at lists.sip-router.org] Im Auftrag von Daniel-Constantin Mierla
Gesendet: Mittwoch, 16. November 2016 10:34
An: Kamailio (SER) - Users Mailing List <sr-users at lists.sip-router.org>
Betreff: Re: [SR-Users] SDP Codec not removed with RTPengine - but with rtpproxy it worked


Hello,

are you executing rtpengine_manage() before or after removing the codec?

Cheers,
Daniel

On 16/11/16 10:03, Oliver Roth wrote:
Hi there

I have the following problem – I need to remove a codec in the initial INVITE.
This happens since I changed from rtpproxy to rtpengine. I changed all rtpproxy_manage() to rtpengine_manage().

Originating INVITE with the “clearmode”

m=audio 9196 RTP/AVP 8 0 125 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:125 CLEARMODE/8000
a=rtpmap:101 telephone-event/8000


I do the following in the config
route[SDP] {
                xlog(, "L_INFO", "SDP: request method $rm");

                # remove CLEARMODE if Colt
                               if($avp(s:todirection) =~"^MyCarrier+") {

                               if (is_method("INVITE")) {
                                               xlog(, "L_INFO", "SDP remove: request method $rm");
                                               msg_apply_changes();
                                               sdp_remove_codecs_by_name("CLEARMODE");
                                               #sdp_remove_codecs_by_id("125");

                               }
                }
}
This block gets hit as I can see with the xlog entry.

In the sent INVITE the “Clearmode” is still in the sdp header

a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:125 CLEARMODE/8000
a=rtpmap:101 telephone-event/8000

So with rtpproxy – it worked
With rtpengine not any more …

Any idea?

KR,
Oli




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