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[Linphone-developers] Incompatible SDP Answer - why?


From: Clark Case
Subject: [Linphone-developers] Incompatible SDP Answer - why?
Date: Wed, 10 Jan 2018 13:35:34 +0000

Hi - I'm trying to use Linux linphone to call a Cisco video conferencing system. The target system rings, but the call drops immediately after it is answered.

I'm on Linphone 4.1.1. I'm running in a virtual machine with NAT, so I turned on ICE with stun.linphone.org as my stun server. However, the behavior seems to be the same either way. All calls end with "ERROR Incompatible SDP answer received, need to abort the call", but I can't tell what is incompatible.

I'm not sure what all  would be useful from the log, but here's what I think are the interesting bits (with some names and addresses modified)...

18-01-09 17:03:01:620 MESSAGE Changing [client] [INVITE] transaction [0x4c19a30], from state [INIT] to [CALLING]
2018-01-09 17:03:01:621 MESSAGE channel [0x4bd3a80]: message sent to [UDP://TARGETDOMAIN.com:5060], size: [1873] bytes
INVITE sip:address@hidden SIP/2.0
Via: SIP/2.0/UDP 192.168.119.128:5060;branch=z9hG4bK.FF86uOS4G;rport
From: <sip:address@hidden>;tag=cRV-aL4fo
To: sip:address@hidden
CSeq: 20 INVITE
Call-ID: 2jzznVQEDP
Max-Forwards: 70
Supported: replaces, outbound
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO, UPDATE
Content-Type: application/sdp
Content-Length: 946
Contact: <sip:address@hidden;transport=udp>;+sip.instance="<urn:uuid:189dcf71-0336-40fa-93bb-cf171cf2aa42>"
User-Agent: Linphone Desktop/4.1.1 (belle-sip/1.6.3)
Proxy-Authorization:  Digest realm="sip.linphone.org", nonce="M7r/3QAAAAA7LW7yAACjngun/VAAAAAA", algorithm=MD5, opaque="+GNywA==", username="MyUserName",  uri="sip:address@hidden", response="7910c766fe3a9ce2835a097cb378ba6f", cnonce="HMXOeAlwCD6kbGJp", nc=00000003, qop=auth

v=0
o=MyUserName 2834 396 IN IP4 192.168.119.128
s=Talk
c=IN IP4 192.168.119.128
t=0 0
a=ice-pwd:3b84d959a1ac2209af667740
a=ice-ufrag:760fdf3c
a=rtcp-xr:rcvr-rtt=all:10000 stat-summary=loss,dup,jitt,TTL voip-metrics
m=audio 51016 RTP/AVPF 96 97 98 0 8 18 101 99 100
c=IN IP4 205.175.250.247
a=rtpmap:96 opus/48000/2
a=fmtp:96 useinbandfec=1
a=rtpmap:97 speex/16000
a=fmtp:97 vbr=on
a=rtpmap:98 speex/8000
a=fmtp:98 vbr=on
a=fmtp:18 annexb=yes
a=rtpmap:101 telephone-event/48000
a=rtpmap:99 telephone-event/16000
a=rtpmap:100 telephone-event/8000
a=rtcp:43312
a=candidate:1 1 UDP 2130706431 192.168.119.128 7078 typ host
a=candidate:1 2 UDP 2130706430 192.168.119.128 7079 typ host
a=candidate:2 1 UDP 1694498815 205.175.250.247 51016 typ srflx raddr 192.168.119.128 rport 7078
a=candidate:2 2 UDP 1694498814 205.175.250.247 43312 typ srflx raddr 192.168.119.128 rport 7079
a=rtcp-fb:* trr-int 5000
a=rtcp-fb:* ccm tmmbr

2018-01-09 17:03:01:641 MESSAGE channel [0x4bd3a80]: received [336] new bytes from [UDP://TARGETDOMAIN.com:5060]:
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.119.128:5060;branch=z9hG4bK.FF86uOS4G;received=10.88.143.159;rport=54346;ingress-zone=DefaultZone
Call-ID: 2jzznVQEDP
CSeq: 20 INVITE
From: <sip:address@hidden>;tag=cRV-aL4fo
To: <sip:address@hidden>
Server: TANDBERG/4131 (X8.6.1)
Content-Length: 0


2018-01-09 17:03:01:646 MESSAGE channel [0x4bd3a80] [336] bytes parsed
2018-01-09 17:03:01:646 MESSAGE channel [0x4bd3a80]: discovered public ip and port are [10.88.143.159:54346]
2018-01-09 17:03:01:646 MESSAGE Found transaction matching response.
2018-01-09 17:03:01:646 MESSAGE Changing [client] [INVITE] transaction [0x4c19a30], from state [CALLING] to [PROCEEDING]
2018-01-09 17:03:01:646 MESSAGE op [0x2d4ccb0] : set_or_update_dialog() current=[(nil)] new=[(nil)]
2018-01-09 17:03:01:646 MESSAGE Op [0x2d4ccb0] receiving call response [100], dialog is [(nil)] in state [BELLE_SIP_DIALOG_NULL]
2018-01-09 17:03:01:799 MESSAGE channel [0x4bd3a80]: received [468] new bytes from [UDP://TARGETDOMAIN.com:5060]:
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP 192.168.119.128:5060;branch=z9hG4bK.FF86uOS4G;received=10.88.143.159;rport=54346;ingress-zone=DefaultZone
Call-ID: 2jzznVQEDP
CSeq: 20 INVITE
From: <sip:address@hidden>;tag=cRV-aL4fo
To: <sip:address@hidden>;tag=62daac57f5e0e873
Record-Route: <sip:address@hidden:5060;transport=udp;lr>
Server: TANDBERG/4131 (X8.6.1)
Content-Length: 0


2018-01-09 17:03:01:804 MESSAGE channel [0x4bd3a80] [468] bytes parsed
2018-01-09 17:03:01:804 MESSAGE Found transaction matching response.
2018-01-09 17:03:01:804 MESSAGE New client dialog [0x4c08520] , local tag [cRV-aL4fo], remote tag [62daac57f5e0e873]
2018-01-09 17:03:01:804 MESSAGE Dialog [0x4c08520]: now updated by transaction [0x4c19a30].
2018-01-09 17:03:01:804 MESSAGE op [0x2d4ccb0] : set_or_update_dialog() current=[(nil)] new=[0x4c08520]
2018-01-09 17:03:01:804 MESSAGE Op [0x2d4ccb0] receiving call response [180], dialog is [0x4c08520] in state [BELLE_SIP_DIALOG_EARLY]
2018-01-09 17:03:01:804 MESSAGE Doing SDP offer/answer process of type outgoing
2018-01-09 17:03:01:804 MESSAGE ms_filter_unlink: MSRtpRecv:0x473a560,0-->MSVoidSink:0x4987580,0
2018-01-09 17:03:01:805 MESSAGE speex_lib_ctl init with neon ? 0
2018-01-09 17:03:01:806 MESSAGE Configuring resampler input with rate=[8000], nchannels=[1]
2018-01-09 17:03:01:806 MESSAGE MSFilePlayer[0x4be6a40]: /app/share/sounds/linphone/ringback.wav opened: rate=8000,channel=1
2018-01-09 17:03:01:806 MESSAGE configuring resampler output to rate=[8000], nchannels=[1]
2018-01-09 17:03:01:806 MESSAGE ms_filter_link: MSFilePlayer:0x4be6a40,0-->MSDtmfGen:0x4bfafb0,0
2018-01-09 17:03:01:806 MESSAGE ms_filter_link: MSDtmfGen:0x4bfafb0,0-->MSResample:0x473a560,0
2018-01-09 17:03:01:806 MESSAGE ms_filter_link: MSResample:0x473a560,0-->MSPulseWrite:0x4987580,0
2018-01-09 17:03:01:806 MESSAGE Initializing speex resampler in mode [voip] 
2018-01-09 17:03:01:992 WARNING Player: We are late of 180 miliseconds.
2018-01-09 17:03:01:992 WARNING MSAudio MSTicker: We are late of 178 miliseconds.
2018-01-09 17:03:01:993 MESSAGE pulseaudio playback stream connected (8000Hz, 1ch)
2018-01-09 17:03:01:993 MESSAGE Remote ringing...
2018-01-09 17:03:01:993 MESSAGE Call 0x45e3a70: moving from state LinphoneCallOutgoingProgress to LinphoneCallOutgoingRinging
2018-01-09 17:03:01:993 MESSAGE Linphone core [0x7f8598008610] notified [call_state_changed]
2018-01-09 17:03:01:995 MESSAGE Priority used: 99
2018-01-09 17:03:01:995 MESSAGE Ring MSTicker setpriority() failed: Permission denied, nevermind.
2018-01-09 17:03:02:915 MESSAGE channel [0x4bd3a80]: keep alive sent to [UDP://TARGETDOMAIN.com:5060]
2018-01-09 17:03:05:493 MESSAGE channel [0x4bd3a80]: received [920] new bytes from [UDP://TARGETDOMAIN.com:5060]:
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.119.128:5060;branch=z9hG4bK.FF86uOS4G;received=10.88.143.159;rport=54346;ingress-zone=DefaultZone
Call-ID: 2jzznVQEDP
CSeq: 20 INVITE
Contact: <sip:address@hidden>
From: <sip:address@hidden>;tag=cRV-aL4fo
To: <sip:address@hidden>;tag=62daac57f5e0e873
Record-Route: <sip:address@hidden:5060;transport=udp;lr>
Allow: INVITE,ACK,BYE,CANCEL,INFO,REFER,NOTIFY
Server: TANDBERG/4131 (X8.6.1)
Content-Type: application/sdp
Content-Length: 324

v=0
o=tandberg 0 1 IN IP4 127.0.0.1
s=-
c=IN IP4 AAA.BBB.CCC.100
b=AS:1536
t=0 0
m=audio 52248 RTP/AVP 18 8 0 101
b=TIAS:64000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
a=rtcp:52249 IN IP4 AAA.BBB.CCC.100

2018-01-09 17:03:05:498 MESSAGE channel [0x4bd3a80] [596] bytes parsed
2018-01-09 17:03:05:498 MESSAGE channel [0x4bd3a80] read [324] bytes of body from [TARGETDOMAIN.com:5060]
2018-01-09 17:03:05:499 MESSAGE Found transaction matching response.
2018-01-09 17:03:05:499 MESSAGE Changing [client] [INVITE] transaction [0x4c19a30], from state [PROCEEDING] to [ACCEPTED]
2018-01-09 17:03:05:499 MESSAGE Dialog [0x4c08520]: now updated by transaction [0x4c19a30].
2018-01-09 17:03:05:499 MESSAGE op [0x2d4ccb0] : set_or_update_dialog() current=[0x4c08520] new=[0x4c08520]
2018-01-09 17:03:05:499 MESSAGE Op [0x2d4ccb0] receiving call response [200], dialog is [0x4c08520] in state [BELLE_SIP_DIALOG_CONFIRMED]
2018-01-09 17:03:05:506 MESSAGE Found payload G729/8000 fmtp=annexb=no
2018-01-09 17:03:05:506 MESSAGE Found payload PCMA/8000 fmtp=
2018-01-09 17:03:05:506 MESSAGE Found payload PCMU/8000 fmtp=
2018-01-09 17:03:05:506 MESSAGE Found payload telephone-event/8000 fmtp=0-15
2018-01-09 17:03:05:506 MESSAGE Doing SDP offer/answer process of type outgoing
2018-01-09 17:03:05:506 MESSAGE Processing for stream 0
2018-01-09 17:03:05:506 WARNING No matching stream for 0
2018-01-09 17:03:05:506 MESSAGE Call 0x45e3a70: moving from state LinphoneCallOutgoingRinging to LinphoneCallConnected
2018-01-09 17:03:05:553 MESSAGE Linphone core [0x7f8598008610] notified [call_state_changed]
2018-01-09 17:03:05:553 ERROR Incompatible SDP answer received, need to abort the call

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