[Freeswitch-users] How can I trigger a ZRTP connection on an existing call?

[Brian West]

You can't set the zrtp_secure_media=true after a session is created, it
needs to be a global or you set it inside the {} on the bridge or originate
line.    Then you're outlining uuid_media off, which would make the media
go between the two endpoints, FreeSWITCH isn't even involved in the zrtp
exchange at that point.  Technically your endpoints should be the ones
doing this and ZRTP should be disabled in FreeSWITCH, You really only need
ZRTP with MiTM if you MUSt transcode or you're terminating directly on the
FreeSWITCH instance.   I should really just rip out MiTM support.

On Tue, Feb 10, 2015 at 5:53 AM, Peter Steinbach <lists at telefaks.de> wrote:

>  Hello,
>
> I want to establish ZRTP, after I am bridging 2 calls, which have been
> active already before.
>
> My scenario is as follows:
>
>    - Caller A is calling Freeswitch, the call is answered and an
>    announcement is played
>    - In the meantime Freeswitch calls another Party B and connects it to
>    an internal IVR, where also announcements are played.
>    - Now, after a while, I decide to connect the calls together, then
>    send an "uuid_media off <uuid>" to the calling party A leg, reinvites occur
>    and bypass media works.
>    - However the 2 SIP clients (Csipsimple) do not start a ZRTP session
>    - If caller A calls B directly via bypass media, the ZRTP is active,
>    by the way.
>
> I suspect that ZRTP somehow should be forced or triggered. Is there a way
> to do that? I already invited the B leg with "zrtp_secure_media=true" and
> issued
>
>   uuid_setvar 1bd508af-19c7-4e38-8621-731baaf33920 zrtp_secure_media true
>   uuid_media off 1bd508af-19c7-4e38-8621-731baaf33920
> to the A leg. But this did not work.
>
> The main question should be: How can I trigger a ZRTP connection on an
> existing call?
>
> --
> With kind regards
> Peter Steinbach
>
> Telefaks Services GmbHmailto:lists <lists> (att) telefaks.de
> Internet: www.telefaks.de
>
>
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-- 

*Brian West*
brian at freeswitch.org


*Twitter: @FreeSWITCH , @briankwest*
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