WebRTC connection failed due to DTLS error

Anton Pryima zingfrid at gmail.com
Tue Dec 29 12:56:03 UTC 2020 

if it is possible, it will be better to have GST_DEBUG=*:7, but cut only
the connection state (you know, when it will be.... :)

Best regards,
Anton

On Tue, Dec 29, 2020 at 2:52 PM Vladimir Tyutin <vladimir.tyutin at gmail.com>
wrote:

> Sure Anton,
> I will collect it once again and attach it to the next email.
>
> I use the following command to activate logging:
> “export GST_DEBUG=2,webrtc*:6,*dtls*:7”
>
> Let me know if I need to include any other plugins to logging that might
> assist to analyse the issue.
>
> Thanks,
> Vladimir
>
> On 29 Dec 2020, at 15:22, Anton Pryima <zingfrid at gmail.com> wrote:
>
> Hello Vladimir,
>
> I've tried to google your errors and it looks like that dtls is not the
> reason. Can you please attach the full connection log from the beginning?
>
> Best regards,
> Anton.
>
> On Tue, Dec 29, 2020 at 10:02 AM Vladimir Tyutin <
> vladimir.tyutin at gmail.com> wrote:
>
>> Anton,
>> It's difficult to do on opponent side because there I have:
>> 1. iOS application with webrtc
>> 2. Android application with webrtc
>> 3. JS application with webrtc
>>
>> Can you advise how to check openssl there?
>> But all three applications worked well when I used gstreamer version
>> 1.16.0 on my Linux camera device.
>> Once I updated gstreamer version to 1.18.2 on camera device something
>> broke.
>> So I'm pretty sure issue on camera side but I have no idea how to
>> understand this log with dtls error and what should I fix.
>>
>> Moreover on my linux camera device I have gnutls and openssl. What is
>> used by dtls plugin? Is it openssl or gnutls?
>>
>> Thanks,
>> Vladimir
>>
>>
>>
>> On Tue, Dec 29, 2020 at 10:49 AM Anton Pryima <zingfrid at gmail.com> wrote:
>>
>>> Hello Vladimir.
>>>
>>> Try to execute 'openssl version' at the both sides and provide output.
>>>
>>> Best regards,
>>> Anton.
>>>
>>> On Mon, Dec 28, 2020, 22:03 Vladimir Tyutin <vladimir.tyutin at gmail.com>
>>> wrote:
>>>
>>>> I still can't resolve the issue.
>>>> Can someone with dtls plugin experience analyze the log attached and
>>>> tell me what is wrong and how to fix it?
>>>>
>>>> DTLS plugin exists. Openssl is available on my camera device:
>>>> root at tina:~# openssl version
>>>> OpenSSL 1.1.0i  14 Aug 2018
>>>>
>>>> So why webrtc can't connect due to dtls issue?
>>>>
>>>> Same code was working on gstreamer version 1.16.0. The issue appeared
>>>> when I migrated to gstreamer version 1.18.2.
>>>>
>>>> I have also updated libnice to the latest version.
>>>>
>>>> Please help me.
>>>>
>>>> Thanks,
>>>> Vladimir
>>>>
>>>> On Thu, Dec 24, 2020 at 10:48 AM Vladimir Tyutin <
>>>> vladimir.tyutin at gmail.com> wrote:
>>>>
>>>>> Thanks Anton,
>>>>> Do you know if there any command in Linux to verify OpenSSL exists and
>>>>> running well?
>>>>> In my build for openwrt Linux OpenSSL is included.
>>>>>
>>>>> On 24 Dec 2020, at 10:25, Anton Pryima <zingfrid at gmail.com> wrote:
>>>>>
>>>>> 
>>>>> Hello Vladimir.
>>>>>
>>>>> According to both logs provided, I see an issue with OpenSSL. Please
>>>>> ensure that both ends have correct and working versions of OpenSSL.
>>>>>
>>>>> Best regards,
>>>>> Anton
>>>>>
>>>>> On Thu, Dec 24, 2020, 08:40 Vladimir Tyutin <vladimir.tyutin at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> Hello everyone,
>>>>>> Can someone help me with issue below?
>>>>>> Please review the log from previous mail and suggest what is the
>>>>>> issue with dtls and how to fix it.
>>>>>>
>>>>>> Thanks,
>>>>>> Vladimir
>>>>>>
>>>>>> On 20 Dec 2020, at 09:53, Vladimir Tyutin <vladimir.tyutin at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>> 
>>>>>> Please find the log attached with dtls log level set to 7.
>>>>>> Please help me to understand what is wrong and why peer connection is
>>>>>> failing.
>>>>>>
>>>>>> Thanks,
>>>>>> Vladimir
>>>>>>
>>>>>> On Sun, Dec 20, 2020 at 8:56 AM Vladimir Tyutin <
>>>>>> vladimir.tyutin at gmail.com> wrote:
>>>>>>
>>>>>>> Hi Sean,
>>>>>>> Thanks for your reply. Could you please advise how better to collect
>>>>>>> DTLS pcaps?
>>>>>>> I can activate log for DTLS element like this:
>>>>>>> export GST_DEBUG=2,dtls*:7
>>>>>>> Is it enough?
>>>>>>>
>>>>>>> By the way I'm trying to get webrtc working between Lindenis V536
>>>>>>> camera and iOS app.
>>>>>>> They have already worked before together. On iOS side nothing is
>>>>>>> changed.
>>>>>>> in camera side I have migrated from gstreamer version 1.16.0 to
>>>>>>> version 1.18.2.
>>>>>>> So is there any changes in dtls side between these versions.
>>>>>>> Any suggesting how better to debug this issue I would appreciate.
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Vladimir
>>>>>>>
>>>>>>> PS. I will share DTLS element logs once I collect it.
>>>>>>>
>>>>>>> On Sun, Dec 20, 2020 at 1:19 AM Sean DuBois <sean at siobud.com> wrote:
>>>>>>>
>>>>>>>> Hey Vladimir,
>>>>>>>>
>>>>>>>> Would you mind getting a pcap of your DTLS traffic? I assume you are
>>>>>>>> getting a Close because the clients are incompatible. These are the
>>>>>>>> big
>>>>>>>> ones I have seen with DTLS.
>>>>>>>>
>>>>>>>> * One side doesn't have use_srtp
>>>>>>>> * DTLS v1.0 and v1.2 mismatch
>>>>>>>> * One side requiring Extended Master Secret, other side not
>>>>>>>> supporting
>>>>>>>> * .... lots of other crazy stuff :)
>>>>>>>>
>>>>>>>> thanks
>>>>>>>>
>>>>>>>> On Sat, Dec 19, 2020 at 04:54:58PM +0300, Vladimir Tyutin wrote:
>>>>>>>> > Please assist me to solve the issue below.
>>>>>>>> > I observe WebRTC peer connection can't be established.
>>>>>>>> > In log I see some errors related to dtls. Please help me
>>>>>>>> understand the log
>>>>>>>> > below and get the issue resolved:
>>>>>>>> >
>>>>>>>> > 0:01:21.644288173  1090  0x1b401b0 TRACE              webrtcbin
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/webrtc/gstwebrtcbin.c:1073:_collate_peer_connection_states:<webrtc>
>>>>>>>> > transceiver 0x1ab0f08 DTLS state: 0x0
>>>>>>>> > 0:01:21.644405214  1090  0x1b401b0 TRACE              webrtcbin
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/webrtc/gstwebrtcbin.c:1086:_collate_peer_connection_states:<webrtc>
>>>>>>>> > transceiver 0x1ab0f08 ICE state: 0x1
>>>>>>>> > 0:01:21.644569089  1090  0x1b401b0 TRACE              webrtcbin
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/webrtc/gstwebrtcbin.c:1073:_collate_peer_connection_states:<webrtc>
>>>>>>>> > transceiver 0x1bed050 DTLS state: 0x3
>>>>>>>> > 0:01:21.644678631  1090  0x1b401b0 TRACE              webrtcbin
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/webrtc/gstwebrtcbin.c:1086:_collate_peer_connection_states:<webrtc>
>>>>>>>> > transceiver 0x1bed050 ICE state: 0x2
>>>>>>>> > 0:01:21.644764381  1090  0x1b401b0 TRACE              webrtcbin
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/webrtc/gstwebrtcbin.c:1131:_collate_peer_connection_states:<webrtc>
>>>>>>>> > ICE connection state: 0x6. DTLS connection state: 0x9
>>>>>>>> > 0:01:21.644837673  1090  0x1b401b0 FIXME              webrtcbin
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/webrtc/gstwebrtcbin.c:1189:_collate_peer_connection_states:<webrtc>
>>>>>>>> > Undefined situation detected, returning old state
>>>>>>>> > 0:01:21.762102246  1090  0x1f1b7b0 WARN           dtlssrtpdemux
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/dtls/gstdtlssrtpdemux.c:134:sink_chain:<dtlssrtpdemux2>
>>>>>>>> > received invalid buffer: 1
>>>>>>>> > 0:01:21.769914036  1090  0x1f1b7b0 ERROR         dtlsconnection
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/dtls/gstdtlsconnection.c:985:handle_error:<GstDtlsConnection at 0x1da56f0
>>>>>>>> >
>>>>>>>> > Fatal SSL error
>>>>>>>> > 0:01:21.770157620  1090  0x1f1b7b0 ERROR         dtlsconnection
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/dtls/gstdtlsconnection.c:968:ssl_err_cb:<GstDtlsConnection at 0x1da56f0
>>>>>>>> >
>>>>>>>> > ssl error:
>>>>>>>> > 2947169560:error:14102410:lib(20):func(258):reason(1040):NA:0:SSL
>>>>>>>> alert
>>>>>>>> > number 40
>>>>>>>> >
>>>>>>>> > 0:01:21.770551453  1090  0x1f1b7b0 ERROR                dtlsdec
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/dtls/gstdtlsdec.c:502:process_buffer:<dtlsdec2>
>>>>>>>> > Error processing buffer: Fatal SSL error
>>>>>>>> > 0:01:21.770553453  1090  0x1b401b0 TRACE              webrtcbin
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/webrtc/gstwebrtcbin.c:1073:_collate_peer_connection_states:<webrtc>
>>>>>>>> > transceiver 0x1ab0f08 DTLS state: 0x0
>>>>>>>> > 0:01:21.770745245  1090  0x1b401b0 TRACE              webrtcbin
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/webrtc/gstwebrtcbin.c:1086:_collate_peer_connection_states:<webrtc>
>>>>>>>> > transceiver 0x1ab0f08 ICE state: 0x1
>>>>>>>> > 0:01:21.770861286  1090  0x1b401b0 TRACE              webrtcbin
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/webrtc/gstwebrtcbin.c:1073:_collate_peer_connection_states:<webrtc>
>>>>>>>> > transceiver 0x1bed050 DTLS state: 0x2
>>>>>>>> > 0:01:21.770951120  1090  0x1b401b0 TRACE              webrtcbin
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/webrtc/gstwebrtcbin.c:1086:_collate_peer_connection_states:<webrtc>
>>>>>>>> > transceiver 0x1bed050 ICE state: 0x2
>>>>>>>> > 0:01:21.771039203  1090  0x1b401b0 TRACE              webrtcbin
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/webrtc/gstwebrtcbin.c:1131:_collate_peer_connection_states:<webrtc>
>>>>>>>> > ICE connection state: 0x6. DTLS connection state: 0x5
>>>>>>>> > 0:01:21.771119036  1090  0x1b401b0 TRACE              webrtcbin
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/webrtc/gstwebrtcbin.c:1145:_collate_peer_connection_states:<webrtc>
>>>>>>>> > returning failed
>>>>>>>> > 0:01:21.771230036  1090  0x1b401b0 INFO               webrtcbin
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/webrtc/gstwebrtcbin.c:1295:_update_peer_connection_state_task:<webrtc>
>>>>>>>> > Peer connection state change from connecting(1) to failed(4)
>>>>>>>> > [CAMERA_DEBUG] Peer connection state: failed
>>>>>>>> > 0:01:21.770664245  1090  0x1f1b7b0 WARN                 dtlsdec
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/dtls/gstdtlsdec.c:503:process_buffer:<dtlsdec2>
>>>>>>>> > error: Fatal SSL error
>>>>>>>> > 0:01:21.772238245  1090  0x1f1b7b0 ERROR                dtlsdec
>>>>>>>> >
>>>>>>>> gst-plugins-bad-1.18.2/ext/dtls/gstdtlsdec.c:618:sink_chain:<dtlsdec2>
>>>>>>>> > Failed to process buffer: error
>>>>>>>> > 0:01:21.808121366  1090  0x1f1ba90 WARN                 basesrc
>>>>>>>> >
>>>>>>>> gstreamer-1.18.2/libs/gst/base/gstbasesrc.c:3127:gst_base_src_loop:<nicesrc2>
>>>>>>>> > error: Internal data stream error.
>>>>>>>> > 0:01:21.808266866  1090  0x1f1ba90 WARN                 basesrc
>>>>>>>> >
>>>>>>>> gstreamer-1.18.2/libs/gst/base/gstbasesrc.c:3127:gst_base_src_loop:<nicesrc2>
>>>>>>>> > error: streaming stopped, reason error (-5)
>>>>>>>> > 0:01:21.809681158  1090  0x1f1ba90 WARN                   queue
>>>>>>>> >
>>>>>>>> gstreamer-1.18.2/plugins/elements/gstqueue.c:990:gst_queue_handle_sink_event:<queue8>
>>>>>>>> > error: Internal data stream error.
>>>>>>>> > 0:01:21.809811158  1090  0x1f1ba90 WARN                   queue
>>>>>>>> >
>>>>>>>> gstreamer-1.18.2/plugins/elements/gstqueue.c:990:gst_queue_handle_sink_event:<queue8>
>>>>>>>> > error: streaming stopped, reason error (-5)
>>>>>>>>
>>>>>>>> > _______________________________________________
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>>>>>>>> > gstreamer-devel at lists.freedesktop.org
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>>>>>>>>
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>>>>>>>>
>>>>>>> <log_v536.txt>
>>>>>>
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