28 Jan
2022
28 Jan
'22
2:24 a.m.
Hi,
Unfortunately in my experience "Opportunistic SRTP" support is broken in
many UAs. There are (at least) two ways of doing it covered indirectly in
RFC3264 <https://tools.ietf.org/html/rfc3264> and the second explicitly in
RFC8643 <https://www.rfc-editor.org/rfc/rfc8643.html> and devices seem to
handle them differently. I've seen end devices that *can *support SRTP
choose to use standard RTP when offered the wrong type of SDP body.
One thing I considered (but haven't tested so far) is using a late offer to
discover what format the end device expects before sending an offer, but
that might cause interop problems of its own.
Cheers
On Thu, Jan 27, 2022 at 10:54 PM Social Boh <social(a)bohboh.info> wrote:
I can examine the request but how examine the answer
if is a Error?
Using a failure route?
Regards
---
I'm SoCIaL, MayBe
El 27/01/2022 a las 5:39 p. m., Alex Balashov escribió:
Does an examination of the SDP offer and answer
respectively not divine
the issue?
> On Jan 27, 2022, at 5:35 PM, Social Boh <social(a)bohboh.info> wrote:
>
> I'm trying to configure Kamailio to permit communication between
devices:
>
> some use TLS and SRTP
>
> some UDP and RTP
>
> with RTPEngine in the middle.
>
> A priori I don't know if the device support SRTP or RTP so in the
routing
I have to detect on the fly how to act. The problem is this:
>
> Call from RTP to SRTP device: 488 Not Acceptable here
>
> Call from SRTP to RTP device: 415 Unsupported Media Type
>
> Any hint?
>
> Thank you
>
> Regards
>
> --
> ---
> I'm SoCIaL, MayBe
>
>
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