[Freeswitch-users] TURN TCP to reduce TURN cost

[Brian West]

You use relay, you speak TCP to the relay and it turns it into UDP,
FreeSWITCH is oblivious that its even taking place.

On Wed, Apr 29, 2020 at 5:34 PM David P <davidswalkabout at gmail.com> wrote:

> Brian West <brian at freeswitch.com> wrote:
>
>> Subject: Re: [Freeswitch-users] ADD 2 ICE CANDIDATES mod_verto
>> set the variable include_external_ip=true
>>
>
> Hey Brian,
>
> Your tip about include_external_ip seemed relevant to my recent question
> whether FS supports TURN TCP; that is, can FS be configured to provide a
> tcp candidate in its answer sdp, which would save the cost of sending calls
> through TURN for users whose firewalls block needed udp ports.
>
> I searched for your variable in the source and found
>
> https://github.com/signalwire/freeswitch/blob/53cd06900c5ce827b2c0ac74485607d9a07d4a7d/src/switch_core_media.c#L9957
> which shows that the transport is not frozen as "udp" but is the value of
> ice_out->cands[0][0].transport
>
> Is it possible for this transport member to be "tcp"? How could one
> configure FS to provide both udp and tcp candidates?
>
> Cheers,
> David
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