[Freeswitch-users] ZRTP Mandatory for Calls

[Victor Medina]

Hi !

Create an additional channel
Enable zrtp and bypass media on this channel.
Connect zrtp clients to this channel.
El 05/08/2015 08:19, "Ollie Owens" <ollie at w4les.net> escribió:

> Hello,
>
> I'm currently struggling to find a way to force Freeswitch to only allow
> ZRTP based calls without a trusted MiTM.
>
> I've tried to use "is_zrtp_secure" from the features.xml to hang the call
> up with the Dialplan but it isn't getting me anywhere.
>
> I've also looked at using LUA scripts to detect when the call has been
> answered and then check on the variables set in switch_channel.c but this
> also doesn't work.
>
> I can see from switch_channel.c that it prints "ZRTP not negotiated on
> both sides; disabling ZRTP passthru mode." and sets zrtp_passthru_active to
> false when this happens.
>
> Can someone point me in the right direction for looking up the value of
> this var once the call has been answered to determine whether ZRTP support
> is available or if there is a better way to approach this?
>
> Cheers,
> Ollie
>
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