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

Oliver Roth oliver.roth at nexphone.ch
Fri Nov 18 09:39:59 CET 2016


Hi,

The codec is removed before sending it to rtpengine …
See the log below



Nov 18 09:37:38 nxp-c4-gw03-pkzh1 /usr/sbin/kamailio[4229]: ERROR: *** cfgtrace:request_route=[RTPPROXY] c=[/etc/kamailio/kamailio-gw.cfg] l=1078 a=2 n=return
Nov 18 09:37:38 nxp-c4-gw03-pkzh1 /usr/sbin/kamailio[4229]: DEBUG: sdpops [sdpops_mod.c:199]: sdp_remove_str_codec_id_attrs(): removing line: a=rtpmap:125 CLEARMODE/8000
Nov 18 09:37:38 nxp-c4-gw03-pkzh1 /usr/sbin/kamailio[4229]: ERROR: *** cfgtrace:branch_route=[MANAGE_BRANCH] c=[/etc/kamailio/kamailio-gw.cfg] l=1889 a=24 n=rtpengine_manage
Nov 18 09:37:38 nxp-c4-gw03-pkzh1 /usr/sbin/kamailio[4229]: DEBUG: <core> [mem/f_malloc.c:444]: fm_malloc(): fm_malloc(0x7fe376c30010, 536) called from rtpengine: bencode.c: __bencode_piece_new(79)
Nov 18 09:37:38 nxp-c4-gw03-pkzh1 /usr/sbin/kamailio[4229]: DEBUG: rtpengine [rtpengine_funcs.c:140]: check_content_type(): type <application/sdp> found valid

But in the outgoing sdp the codec is still listed

v=0
o=Dialogic_SDP 4043679 0 IN IP4 213.173.185.46
s=Dialogic-SIP
c=IN IP4 213.173.185.47
t=0 0
m=audio 9008 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 - - - -

Any ideas?

Kr,
Oli

Von: Daniel-Constantin Mierla [mailto:miconda at gmail.com]
Gesendet: Freitag, 18. November 2016 09:27
An: Oliver Roth <oliver.roth at nexphone.ch>; Kamailio (SER) - Users Mailing List <sr-users at lists.sip-router.org>
Betreff: Re: AW: [SR-Users] SDP Codec not removed with RTPengine - but with rtpproxy it worked


Hello,

On 16/11/16 14:59, Oliver Roth wrote:
Hi,

I guess it is after executing rtpengine_maange() – but not really sure.
How can I check that?
load debugger module and enable cfgtrace option via modparam. Then you should see what functions are executed from config.

Cheers,
Daniel



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><mailto: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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--

Daniel-Constantin Mierla

http://twitter.com/#!/miconda<http://twitter.com/#%21/miconda> - http://www.linkedin.com/in/miconda

Kamailio Advanced Training, Berlin, Nov 28-30, 2016 - http://www.asipto.com



--

Daniel-Constantin Mierla

http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda

Kamailio Advanced Training, Berlin, Nov 28-30, 2016 - http://www.asipto.com
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