Re: [MMUSIC] Handling of unverified data and media

Iñaki Baz Castillo <ibc@aliax.net> Sat, 11 March 2017 15:25 UTC

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From: =?UTF-8?Q?I=C3=B1aki_Baz_Castillo?= <ibc@aliax.net>
Date: Sat, 11 Mar 2017 16:25:46 +0100
Message-ID: <CALiegfkfntWj56NEXhr_waogJtsw9oy_P0Jo331ba_WNzBGRSQ@mail.gmail.com>
To: Christer Holmberg <christer.holmberg@ericsson.com>
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Cc: Flemming Andreasen <fandreas@cisco.com>, "hta@google.com" <hta@google.com>, mmusic@ietf.org
Subject: Re: [MMUSIC] Handling of unverified data and media
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AFAIK you dont need a SDP aswer for that.

El 11/3/2017 16:24, "Christer Holmberg" <christer.holmberg@ericsson.com>
escribió:

> Hi,
>
> In case of a Data Channel, you also need to establish the SCTP association
> before you can send any content.
>
> Regards,
>
> Christer
>
> -----Original Message-----
> From: mmusic [mailto:mmusic-bounces@ietf.org] On Behalf Of Iñaki Baz
> Castillo
> Sent: 11 March 2017 17:12
> To: Roman Shpount <roman@telurix.com>
> Cc: Flemming Andreasen <fandreas@cisco.com>om>; hta@google.com; mmusic WG <
> mmusic@ietf.org>
> Subject: Re: [MMUSIC] Handling of unverified data and media
>
> 2017-03-10 23:47 GMT+01:00 Roman Shpount <roman@telurix.com>om>:
> > My assumption always was that data is received, decoded and discarded
> > until fingerprint is received and verified. This way DTLS handshake
> > completes, key frames are decoded, but user is nor presented with any
> unverified media.
>
> Just imagine an app (running in a computer with public IP) which sends the
> SDP offer to a server, DTLS handshake is done, and the server sends
> DataChannel messages to the browser *before* the browser receives the SDP
> answer.
>
> Do you mean that such a DataChannel messages should be discarded? I
> consider that catastrophic as the server may not know whether the browser
> has yet received the answer or not. Apps should implement some kind of
> 3-way signaling handshake (send offer, receive answer, send
> ACK) before the server sends any DataChannel message.
>
>
> --
> Iñaki Baz Castillo
> <ibc@aliax.net>
>
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