[Freeswitch-users] ICE SDP Params

[Brian West]

This is all related to WebRTC, how are you creating the invite?  Logs would
be helpful./b

On Monday, March 2, 2015, Rob Moore <Rob.Moore at aeriandi.com> wrote:

>  Hi All,
>
>
>
> After a recent upgrade of Freeswitch I’ve been seeing some unusual
> behaviour in codec choice being made by our clients hardware during late
> negotiation calls.
>
> No other changes have  taken place that could have caused this unusual
> behaviour so we assume that it must be something the newer version of
>  freeswitch is doing in this situation.
>
>
>
> Comparing traces before and after the upgrade, the SDP in the final 200
> OK’s from our freeswitch now contains more parameters relating to ICE and
> other source specific attributes. I expect these additional params are what
> is upsetting our clients hardware.
>
>
>
> I’ve since attempted to disable all forms of NAT management in Freeswitch
> in an attempt to get rid of these extra SDP attributes but none of them
> seem to have had any effect:
>
>
>
> Setting the following in the sip Profile to disable stun / NAT.
>
> http://wiki.freeswitch.org/wiki/Sofia.conf.xml#stun-auto-disable
>
> http://wiki.freeswitch.org/wiki/Sofia.conf.xml#stun-enabled
>
>
>
> ensuring the following are set to the local ip of the server
>
> <X-PRE-PROCESS cmd="set" data="external_sip_ip=*localIP* "/>
>
> <X-PRE-PROCESS cmd="set" data="external_rtp_ip=*localIP *"/>
>
>
>
>
>
> Does anyone have any suggestions on how I can remove these additional SDP
> params?
>
>
>
>
>
> I’ve included an example good and bad  200 ok in case I’ve missed anything
> else that’s obvious.
>
>
>
> Many thanks
>
>
>
> Rob
>
>
>
> *Bad 200 ok: *
>
>
>
> *SIP/2.0 200 OK*
>
> *Via: SIP/2.0/UDP
> 172.18.4.78;branch=z9hG4bK0ba4.7a1f3a47e3eb3a2a4e8e13fd7dda8ab8.0*
>
> *Via: SIP/2.0/UDP
> 10.9.138.26:5060;rport=5060;branch=z9hG4bK9ivhm3hvpf5c7vrsu2gh7ou4o2*
>
> *Record-Route: <sip: 172.18.4.78;r2=on;lr=on;rtpi=1;nat=yes>*
>
> *Record-Route: <sip:10.16.0.3;r2=on;lr=on;rtpi=1;nat=yes>*
>
> *From: <sip:8448224432 at 10.150.35.124
> <javascript:_e(%7B%7D,'cvml','sip:8448224432 at 10.150.35.124');>>;tag=130e56d9-dcc0-4483-9c8e-edf93ab1fb9a-33986537*
>
> *To: <sip:00353876721075 at 10.9.138.9
> <javascript:_e(%7B%7D,'cvml','sip:00353876721075 at 10.9.138.9');>>;tag=r3ZZc86S529mD*
>
> *Call-ID: b87ef500-4f012e3b-1f738-7c23960a at 10.150.35.124
> <javascript:_e(%7B%7D,'cvml','b87ef500-4f012e3b-1f738-7c23960a at 10.150.35.124');>*
>
> *CSeq: 101 INVITE*
>
> *Contact: <sip:mod_sofia at 172.18.4.251:5060
> <http://sip:mod_sofia@172.18.4.251:5060>>*
>
> *User-Agent: Aeriandi Tel Server*
>
> *Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE,
> REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE*
>
> *Supported: path, replaces*
>
> *Allow-Events: talk, hold, conference, presence, as-feature-event, dialog,
> line-seize, call-info, sla, include-session-description, presence.winfo,
> message-summary, refer*
>
> *Content-Type: application/sdp*
>
> *Content-Disposition: session*
>
> *Content-Length: 841*
>
> *x-nt-location: -1*
>
>
>
> *v=0*
>
> *o=FreeSWITCH 1425007009 1425007010 IN IP4 172.18.4.251*
>
> *s=FreeSWITCH*
>
> *c=IN IP4 172.18.4.251*
>
> *t=0 0*
>
> *a=msid-semantic: WMS hGYoorbKxEnXtlapBPoffcf3QQg7ijgq*
>
> *m=audio 19630 RTP/SAVPF 18 0 8 101*
>
> *a=rtpmap:18 G729/8000*
>
> *a=rtpmap:0 PCMU/8000*
>
> *a=rtpmap:8 PCMA/8000*
>
> *a=rtpmap:101 telephone-event/8000*
>
> *a=fingerprint:sha-256
> 18:6A:21:5F:BF:02:8B:52:29:96:85:6B:05:99:B2:9D:C7:B3:26:DB:F9:32:5A:90:51:62:E8:21:3E:C2:23:C3*
>
> *a=rtcp-mux*
>
> *a=rtcp:19630 IN IP4 172.18.4.251*
>
> *a=ssrc:3641993291 cname:Q4E4mGFKbSxu4yJv*
>
> *a=ssrc:3641993291 msid:hGYoorbKxEnXtlapBPoffcf3QQg7ijgq a0*
>
> *a=ssrc:3641993291 mslabel:hGYoorbKxEnXtlapBPoffcf3QQg7ijgq*
>
> *a=ssrc:3641993291 label:hGYoorbKxEnXtlapBPoffcf3QQg7ijgqa0*
>
> *a=ice-ufrag:eYAj0GcHniFvsLL8*
>
> *a=ice-pwd:Gg3SMysNgP8bdIwhwXqnttUH*
>
> *a=candidate:1204810811 1 udp 659136 172.18.4.251 19630 typ host
> generation 0*
>
> *a=ptime:20*
>
>
>
>
>
> *good 200 ok:*
>
>
>
> *SIP/2.0 200 OK*
>
> *Via: SIP/2.0/UDP
> 172.18.4.78;branch=z9hG4bKef6a.6cc24c86d42011b141c967c04c23e077.0*
>
> *Via: SIP/2.0/UDP
> 10.9.138.26:5060;rport=5060;branch=z9hG4bKa2v9mvku4854npk24c4tn51vv2*
>
> *Record-Route: <sip:172.18.4.78;r2=on;lr=on;rtpi=1;nat=yes>*
>
> *Record-Route: <sip:10.16.0.3;r2=on;lr=on;rtpi=1;nat=yes>*
>
> *From: <sip:8448224432 at 10.151.35.123
> <javascript:_e(%7B%7D,'cvml','sip:8448224432 at 10.151.35.123');>>;tag=130e56d9-dcc0-4483-9c8e-edf93ab1fb9a-33990014*
>
> *To: <sip:07940845322 at 10.9.138.9
> <javascript:_e(%7B%7D,'cvml','sip:07940845322 at 10.9.138.9');>>;tag=Fy3a1Zv7Kt6Xm*
>
> *Call-ID: f59cb480-4f014116-1f782-7b23970a at 10.151.35.123
> <javascript:_e(%7B%7D,'cvml','f59cb480-4f014116-1f782-7b23970a at 10.151.35.123');>*
>
> *CSeq: 101 INVITE*
>
> *Contact: <sip:mod_sofia at 172.18.4.254:5060
> <http://sip:mod_sofia@172.18.4.254:5060>>*
>
> *User-Agent: Aeriandi Tel Server*
>
> *Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE,
> REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE*
>
> *Supported: precondition, path, replaces*
>
> *Allow-Events: talk, hold, conference, presence, dialog, line-seize,
> call-info, sla, include-session-description, presence.winfo,
> message-summary, refer*
>
> *Content-Type: application/sdp*
>
> *Content-Disposition: session*
>
> *Content-Length: 224*
>
> *x-nt-location: -1*
>
>
>
> *v=0*
>
> *o=FreeSWITCH 1425014601 1425014602 IN IP4 172.18.4.254*
>
> *s=FreeSWITCH*
>
> *c=IN IP4 172.18.4.254*
>
> *t=0 0*
>
> *m=audio 16858 RTP/AVP 18 0 8 101*
>
> *a=fmtp:18 annexb=no*
>
> *a=rtpmap:101 telephone-event/8000*
>
> *a=fmtp:101 0-16*
>
> *a=ptime:20*
>
>
>


-- 

*Brian West*
brian at freeswitch.org


*Twitter: @FreeSWITCH , @briankwest*
http://www.freeswitchbook.com
http://www.freeswitchcookbook.com

*T:*+19184209001 | *F:*+19184209002 | *M:*+1918424WEST (9378)
*iNUM:*+883 5100 1420 9001 | *ISN:*410*543 | *Skype:*briankwest
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