Erlang DTLS SRTP extension support

[pablo platt]

There is a PR to add custom hello extensions [1] and PR specifically for
DTLS SRTP [2].
For WebRTC we should be able to dynamically select SRTP_AEAD_AES_128_GCM or
SRTP_AES128_CM_HMAC_SHA1_80 based on supported extensions in client hello.
I really hope otp 24 will add official support for DTLS SRTP. WebRTC is
massive and the change required in erlang is minimal (20 lines of code?)

[1] https://github.com/erlang/otp/pull/4642
[2]
https://github.com/stolen/otp/commit/e4b416708ffb5ee0e75793c3c627983b83db5081

On Thu, Apr 8, 2021 at 11:25 PM Max Lapshin <max.lapshin@REDACTED> wrote:

> No.
>
> We have a patch for erl24 that may help to implement it and I hope to
> publish it soon.
>
> OTP team has done a great job and now it is almost possible to run
> webrtc with vanilla erlang (we had to use a separate tls
> implementation for it).
>
> On Thu, Apr 8, 2021 at 10:25 PM Kaiduan Xie <kaiduanx@REDACTED> wrote:
> >
> > Hi,
> >
> > Does Erlang DTLS implementation support SRTP extension? I would like to
> write a WebRTC server in Erlang.
> >
> > Best regards,
> >
> > /Kaiduan
> > --
> > Founder of Goodstartsoft
> > https://www.goodstartsoft.com
>
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