[Freeswitch-users] Accepting an "optional" SRTP offer (crypto in RTP/AVP) and establishing SRTP

[Brian West]

1.6.20 is unsupported now that 1.8 is out

On Tue, Oct 16, 2018 at 1:55 PM William Simon <wsimon at stratusvideo.com>
wrote:

> Michael, are you aware of a bug that would cause this behavior in 1.6.20?
> Just trying to narrow down whether we are up against a bug or a
> configuration error on our part.
>
>
> > On Oct 12, 2018, at 6:00 PM, Michael Jerris <mike at jerris.com> wrote:
> >
> > Are you trying this on 1.8.2 version?
> >
> >> On Oct 5, 2018, at 10:27 AM, William Simon <wsimon at stratusvideo.com>
> wrote:
> >>
> >> We are working with an endpoint that offers optional SRTP in the
> non-RFC-compliant way of an a=crypto attribute within RTP/AVP.
> >>
> >> I have told FreeSWITCH to allow this with rtp_allow_crypto_in_avp=true
> at the right place in the dialplan.
> >>
> >> Immediately after that in the dialplan I have to reject SRTP by using
> rtp_secure_media=forbidden, otherwise the call setup still fails. By
> setting the value to forbidden, the call does proceed unencrypted.
> >>
> >> We want FreeSWITCH to proceed with media encryption. Setting
> rtp_secure_media to any other value results in FreeSWITCH rejecting the
> offer like this:
> >>
> >> v=0
> >> o=FreeSWITCH 1538660754 1538660755 IN IP4 192.168.100.104
> >> s=FreeSWITCH
> >> c=IN IP4 192.168.100.104
> >> t=0 0
> >> m=audio 0 RTP/AVP 19
> >> m=video 0 RTP/AVP 19
> >>
> >> Is there anything else I can do to force SRTP in the answer?
> >>
> >>
> >
> >
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Brian West | Co-founder and Developer

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