SRTP error on latest master with latest chrome

[kaiduan xie]

Hi,

It seems that the latest master is broken with the latest Chrome. For the video room test, the following error was thrown.

[ERR] [dtls.c:janus_dtls_srtp_incoming_msg:923] [1540491290345059] Oops, error creating inbound SRTP session for component 1 in stream 1??

[ERR] [dtls.c:janus_dtls_srtp_incoming_msg:924] [1540491290345059]  -- 1 (srtp_err_status_fail)

[1540491290345059] DTLS alert triggered on stream 1 (component 1), closing...

My last time to checkout the code was on November 19, and it worked before I upgraded Chrome recently. I upgraded to the latest master version of Janus, the above problem occurred.

commit b7979bb0666f41728ab9c1105f802839ea97324a (HEAD -> master, origin/master, origin/HEAD)

Author: Lorenzo Miniero <lmin...@gmail.com>

Date:   Tue Feb 8 17:49:09 2022 +0100

    Reset extensions struct when not used

Google Chrome	99.0.4844.15 (Official Build) beta (x86_64)
Revision	9c3a2b5676cf5b65e0ca0ce5860f7eba320cf544-refs/branch-heads/4844@{#159}

Any idea to fix this issue?

Thanks,

/Kaiduan

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Founder of Goodstartsoft

https://www.goodstartsoft.com

[kaiduan xie]

When installing GStreamer,

apt-get install libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev libgstreamer-plugins-bad1.0-dev gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav gstreamer1.0-doc gstreamer1.0-tools gstreamer1.0-x gstreamer1.0-alsa gstreamer1.0-gl gstreamer1.0-gtk3 gstreamer1.0-qt5 gstreamer1.0-pulseaudio

The above command installed libsrtp2-1, after removing libsrtp2-1, the problem SRTP error is gone.

However I would like to have GStreamer installed to try simple-whip-client. It looks like that I need to install GStreamer from source code.

/Kaiduan

[kaiduan xie]

Lorenzo,

How do you install GStreamer for simple-whip-client? I installed GStreamer per the instructions on https://gstreamer.freedesktop.org/documentation/installing/on-linux.html?gi-language=c,

but this caused an issue on Janus as described above. The Ubuntu is Ubuntu 20.04.2 LTS.

Thanks,

/Kaiduan

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[kaiduan xie]

I used the LD_PRELOAD trick to ask Janus to use libsrtp 2.2 instead of the libsrtp 2.3 installed by GStreamer.

export LD_PRELOAD=/lib/libsrtp2.so.1

[Alessandro Toppi]

Both libsrtp v2.3 and v2.4 are fine if compiled from sources.

The problem is with some binary distributions that miss needed symbols or ciphers.

I recommend using Docker to isolate processes that might have dependencies conflicts. In particulat having gstreamer and janus installed on the same machine (as you discovered) is often a bad idea.