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Re: [Wish] Comments about draft-murillo-whip

Sergio Garcia Murillo <sergio.garcia.murillo@gmail.com> Sat, 31 July 2021 12:44 UTC

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From: Sergio Garcia Murillo <sergio.garcia.murillo@gmail.com>
Date: Sat, 31 Jul 2021 14:43:56 +0200
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To: Juliusz Chroboczek <jch@irif.fr>
Cc: WISH List <wish@ietf.org>
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Subject: Re: [Wish] Comments about draft-murillo-whip
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El sáb., 31 jul. 2021 14:40, Sergio Garcia Murillo <
sergio.garcia.murillo@gmail.com> escribió:

>
>
> El sáb., 31 jul. 2021 14:30, Juliusz Chroboczek <jch@irif.fr> escribió:
>
>> > Regarding trickle ICE support, note that media servers may not require
>> to be
>> > signaled the new candidates to do ICE trickle. If the media server
>> ports are
>> > reachable to the client, it can learn directly the new candidates from
>> the
>> > stun requests received.
>> >
>> > Anyway, it would be trivial for those servers to accept the htto
>> request and
>> > ignore the contents. So we can make it mandatory.
>>
>> Ok.
>>
>> > What I am not in favor of making ice restart mandatory on server side,
>> so a
>> > media server should be able to reject the restart. That would cause the
>> client
>> > to trigger a new session from scratch.
>>
>> That's okay, restarting the RTP session should not be prohibitive, but it
>> still involves having two paths in the client, one of which will receive
>> very little testing.
>>
>> Sergio, could you please explain what it is that you are worried about?
>> Servers using WebRTC libraries that don't support restarts?  Or something
>> else?
>>
>
> For example i don't support ice restart. I understand that for a
> conferencing service which has a lots 9f tracks opened in both ways,
> restarting all the conferencing state would be cumbersome.
>
> But when you have a single unidirectional stream, doing a full session
> restart is not much more cumbersome than the ice restart.
>


Also, side question, the client should gather the turn server credentials
and update the peerconection configuration before doing the ice restart to
ensure that the short term credentials have not expired, right?

Best regards
Sergio

>

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