[Freeswitch-users] Freeswitch uses wrong ICE candidate to establish connection
Michael Jerris
mike at jerris.com
Tue Sep 27 20:41:45 MSD 2016
If its on Jira, lets put the relevant info there. Putting info here separate from the bug only makes it more likely we will miss a critical deal.
> On Sep 27, 2016, at 10:55 AM, Mirko Brankovic <mirkobrankovic at gmail.com> wrote:
>
> actuallly i forgot kvm, so I have 3 virtual and one real local IP:
> ifconfig | grep inet
> inet addr:172.18.0.1 Bcast:0.0.0.0 Mask:255.255.0.0
> inet addr:172.17.0.1 Bcast:0.0.0.0 Mask:255.255.0.0
> inet addr:10.0.0.112 Bcast:10.0.1.255 Mask:255.255.254.0
> inet addr:127.0.0.1 Mask:255.0.0.0
> inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
>
>
> On Tue, Sep 27, 2016 at 4:48 PM, Mirko Brankovic <mirkobrankovic at gmail.com <mailto:mirkobrankovic at gmail.com>> wrote:
> Well I was using mod_verto and I have local on laptop, lan, wifi, virbr0 (virtualbox), docker0 with local IP and had no issues so far
>
> On Tue, Sep 27, 2016 at 3:57 PM, Александр Дружилов <alexdruzhilov at gmail.com <mailto:alexdruzhilov at gmail.com>> wrote:
> "Are you using mod_sofia with sip or mod_verto ?"
> We are using mod_sofia.
>
> "can you try with varto-communicator and mod_verto wss port ?"
> Can you please explain how it could be helpful in case of this problem?
>
> I have already reported issue in Jira (https://freeswitch.org/jira/browse/FS-9570 <https://freeswitch.org/jira/browse/FS-9570>).
>
> 2016-09-27 16:35 GMT+03:00 Ken Rice <krice at freeswitch.org <mailto:krice at freeswitch.org>>:
> Bugs get reported to Jira @ https://freeswitch.org/jira <https://freeswitch.org/jira> so they don’t fall thru the cracks
>
>
>
> From: freeswitch-users-bounces at lists.freeswitch.org <mailto:freeswitch-users-bounces at lists.freeswitch.org> [mailto:freeswitch-users-bounces at lists.freeswitch.org <mailto:freeswitch-users-bounces at lists.freeswitch.org>] On Behalf Of ????????? ????????
> Sent: Tuesday, September 27, 2016 4:10 AM
> To: freeswitch-users at lists.freeswitch.org <mailto:freeswitch-users at lists.freeswitch.org>
> Subject: [Freeswitch-users] Fwd: Freeswitch uses wrong ICE candidate to establish connection
>
>
>
>
>
> ---------- Forwarded message ----------
> From: Александр Дружилов <alexdruzhilov at gmail.com <mailto:alexdruzhilov at gmail.com>>
> Date: 2016-09-26 14:31 GMT+03:00
> Subject: Freeswitch uses wrong ICE candidate to establish connection
> To: freeswitch-users at lists.freeswitch.org <mailto:freeswitch-users at lists.freeswitch.org>
>
> The short description of problem
>
> We are using Freeswitch for conference calls through webRTC. Chrome collects ICE candidates (from two net interfaces: ethernet and wifi), sends them to Freeswitch and Freeswitch accepts one of this candidates. After that Freeswitch tries to make DTLS handshake, but Chrome ignores it and sends STUN pings over and over again. But if I disable one of this network interfaces, then everything works fine. From my point of view the problem is that Freeswitch uses wrong ICE candidate (it takes this candidate from STUN pings, but there is no exactly such candidate in SDP). I also admit that may be the root of the problem is inside Chrome (because Firefox works properly in this case), but I interested in possible explanations an may be solutions from the Freeswitch side.
>
>
>
> Versions
> Freeswitch 1.6.9, 1.6.10
> Chrome 52, 53, 54
>
> Server OS: CentOS 7.2.1511
> Client OS: Ubuntu 16.04
>
>
>
> IP addresses
>
> 1) 172.15.1.1 - local VM (VirtualBox)
> 2) 192.168.22.57 - local ethernet interface
> 3) 192.168.41.185 - local wi-fi interface
>
> 4) 52.202.171.116 - Freeswitch IP
>
> Succsess case
>
> Chrome sends offer with this candidates (Ethernet and WI-FI addresses)
>
> a=candidate:988003974 1 udp 2122260223 192.168.22.57 56687 typ host generation 0 network-id 1
>
> a=candidate:3404510875 1 udp 2122194687 192.168.41.185 57467 typ host generation 0 network-id 4 network-cost 10
>
> a=candidate:988003974 2 udp 2122260222 192.168.22.57 60099 typ host generation 0 network-id 1
>
> a=candidate:3404510875 2 udp 2122194686 192.168.41.185 54887 typ host generation 0 network-id 4 network-cost 10
>
> a=candidate:3148593202 1 udp 1686052607 80.254.60.17 56687 typ srflx raddr 192.168.22.57 rport 56687 generation 0 network-id 1
>
> a=candidate:3148593202 2 udp 1686052606 80.254.60.17 60099 typ srflx raddr 192.168.22.57 rport 60099 generation 0 network-id 1
>
>
>
> Freeswitch choose srflx candidate
> 2016-09-26 10:54:28.337897 [DEBUG] switch_core_media.c:6434 AUDIO RTP [sofia/external576460752303423473 at wrike] 172.16.106.100 port 17052 -> 80.254.60.17 port 56687 codec: 111 ms: 20
>
> Receives STUN pings from this interface and everything goes as expected - media stream established.
>
> Failure case (add one interface (VirtualBox) or disable one of existing interfaces)
>
> Chrome sends offer with one additional interface (VirtualBox).
>
> a=candidate:1861086701 1 udp 2122260223 172.15.1.1 43367 typ host generation 0 network-id 3
>
> a=candidate:988003974 1 udp 2122194687 192.168.22.57 54230 typ host generation 0 network-id 1
>
> a=candidate:3404510875 1 udp 2122129151 192.168.41.185 42752 typ host generation 0 network-id 4 network-cost 10
>
> a=candidate:1861086701 2 udp 2122260222 172.15.1.1 55301 typ host generation 0 network-id 3
>
> a=candidate:988003974 2 udp 2122194686 192.168.22.57 44112 typ host generation 0 network-id 1
>
> a=candidate:3404510875 2 udp 2122129150 192.168.41.185 46978 typ host generation 0 network-id 4 network-cost 10
>
> a=candidate:3148593202 1 udp 1685987071 80.254.60.17 54230 typ srflx raddr 192.168.22.57 rport 54230 generation 0 network-id 1
>
> a=candidate:3148593202 2 udp 1685987070 80.254.60.17 44112 typ srflx raddr 192.168.22.57 rport 44112 generation 0 network-id 1
>
>
>
> Freeswitch choose VirtualBox interface as main candidate
>
> 2016-09-26 11:03:40.513295 [DEBUG] switch_core_media.c:6434 AUDIO RTP [sofia/external/576460752303423471 at wrike] 172.16.106.100 port 17000 -> 172.15.1.1 port 42374 codec: 111 ms: 20
>
>
>
> After a few STUN pings Freeswitch changes his main candidate to the public address of my Wi-Fi interface (but it was not included in SDP by chrome and I don't know exactly why).
>
> 2016-09-26 11:03:40.912987 [NOTICE] switch_rtp.c:1258 Auto Changing video stun/rtp/dtls port from 172.15.1.1:43367 <http://172.15.1.1:43367/> to 80.254.60.17:42752 <http://80.254.60.17:42752/>
>
> Freeswitch tries to make DTLS handshake with this candidate, but fails because Chrome ingores this "Client Hello" request.
>
>
>
> All necessary data attached for success and failure cases (freeswitch logs, wireshark dump made on client, SDP).
>
>
>
>
> _________________________________________________________________________
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>
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>
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>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org <mailto:consulting at freeswitch.org>
> http://www.freeswitchsolutions.com <http://www.freeswitchsolutions.com/>
>
> Official FreeSWITCH Sites
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>
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>
>
>
> --
> Regards,
> Mirko
> ¯\_(ツ)_/¯
>
>
>
>
> --
> Regards,
> Mirko
> ¯\_(ツ)_/¯
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://confluence.freeswitch.org
> http://www.cluecon.com
>
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