WebRTC connection failed due to DTLS error

Tue Dec 29 12:52:33 UTC 2020

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 <mailto: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 <mailto: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 <mailto: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 <mailto: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 <mailto: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 <mailto: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 <mailto: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 <mailto: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 <mailto: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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