[sr-dev] [Re-devel] ICE=force_relay tests between two baresips

[Alfred E. Heggestad]

On 04/29/2014 06:35 PM, Juha Heinanen wrote:
> i made some ICE=force_relay tests between two baresip sip uas running on
> the same host.  the result was that they decided to use relay candidates
> even when direct connection would have been possible.
>
> the question is why?  is it a bug in baresip's ice implementation or is
> it a result of the fact that rtpengine changed ip address on c line and
> port on m line (which, in opinion, it should not have done), or is the
> priority of relay candidates wrong (i.e., smaller value means higher
> priority)?
>
> sdps are shown below.  any hints would be appreciated. i'll cc also to
> baresip list.
>

<snip>

> ----------- 200 ok sdp from sip proxy to caller
> v=0.
> o=- 2323140971 266432672 IN IP4 192.98.102.30.
> s=-.
> c=IN IP4 192.98.102.30.
> t=0 0.
> a=tool:baresip 0.4.10.
> a=ice-lite.
> a=ice-ufrag:cxB9.
> a=ice-pwd:mLyJkKOP8xHg3Yv9R0BClp.
> m=audio 50014 RTP/AVP 96 97 98 8 0 101.
> b=AS:125.
> a=rtpmap:96 opus/48000/2.
> a=fmtp:96 stereo=1;sprop-stereo=1.
> a=rtpmap:97 speex/16000.
> a=fmtp:97 mode="7";vbr=off;cng=on.
> a=rtpmap:98 speex/8000.
> a=fmtp:98 mode="7";vbr=off;cng=on.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> a=label:1.
> a=rtcp-rsize.
> a=ssrc:2733287141 cname:sip:jh at test.tutpro.com.
> a=ptime:20.
> a=candidate:c062661e 1 UDP 2113932031 192.98.102.30 10332 typ host.
> a=candidate:c062661e 2 UDP 2113932030 192.98.102.30 10333 typ host.
> a=candidate:c0a82b92 1 UDP 2113932031 192.168.43.146 10332 typ host.
> a=candidate:c0a82b92 2 UDP 2113932030 192.168.43.146 10333 typ host.
> a=candidate:c062671e 1 UDP 2113932031 192.98.103.30 10332 typ host.
> a=candidate:c062671e 2 UDP 2113932030 192.98.103.30 10333 typ host.
> a=candidate:63c01c46 1 UDP 2113932031 2002:c062:661e::1 10332 typ host.
> a=candidate:63c01c46 2 UDP 2113932030 2002:c062:661e::1 10333 typ host.
> a=candidate:1e6662c0 1 UDP 2113932031 ::192.98.102.30 10332 typ host.
> a=candidate:1e6662c0 2 UDP 2113932030 ::192.98.102.30 10333 typ host.
> a=sendrecv.
> a=rtcp:50015.
> a=candidate:bTYPlIJSc0vw3WjT 1 UDP 16777216 192.98.102.30 50014 typ relay.
>

^^^^^

it looks like Component 2 (RTCP) is missing here ...?


you can try to run baresip in verbose debug mode (-v) and also
set "ice_debug" to "yes" in the config file.




/alfred