WebRTC connection failed due to DTLS error

Anton Pryima zingfrid at gmail.com
Tue Dec 29 17:05:02 UTC 2020 

BTW, Vladimir, what gstreamer version do you have at your cleints end?

On Tue, Dec 29, 2020, 18:14 Vladimir Tyutin <vladimir.tyutin at gmail.com>
wrote:

> I could not collect log with GST_DEBUG=7 because it's too much for my
> camera device.
> So I collected logs for these plugins:
> export GST_DEBUG=2,webrtc*:7,*rtp*:7,*dtls*:7
>
> Log started from moment I ask webrtc to create SDP offer.
> Please give me any idea what might be wrong and how to solve it.
>
> Thanks,
> Vladimir
>
> On Tue, Dec 29, 2020 at 4:06 PM Vladimir Tyutin <vladimir.tyutin at gmail.com>
> wrote:
>
>> I can collect it from the moment when webrtc offer is generating.
>>
>> My architecture is:
>> 1. Remote client (iOS, Android, Web) send MQTT request to camera device
>> to generate SDP offer
>> 2. Offer is generating on camera and sent to client.
>> 3. Client responds with SDP answer and webrtc session starts
>>
>> I can collect log at the moment offer is generating on camera device.
>>
>> On 29 Dec 2020, at 15:56, Anton Pryima <zingfrid at gmail.com> wrote:
>>
>> 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)
>>>>>>>>>>
>>>>>>>>>> > _______________________________________________
>>>>>>>>>> > gstreamer-devel mailing list
>>>>>>>>>> > gstreamer-devel at lists.freedesktop.org
>>>>>>>>>> > https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
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>>>>>>>>>>
>>>>>>>>> <log_v536.txt>
>>>>>>>>
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