Re: [MMUSIC] Transport tags

Christer Holmberg <christer.holmberg@ericsson.com> Thu, 12 January 2017 20:34 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>, Roman Shpount <roman@telurix.com>
Thread-Topic: [MMUSIC] Transport tags
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Date: Thu, 12 Jan 2017 20:34:35 +0000
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Cc: Magnus Westerlund <magnus.westerlund@ericsson.com>, "mmusic@ietf.org" <mmusic@ietf.org>, Paul Kyzivat <paul.kyzivat@comcast.net>
Subject: Re: [MMUSIC] Transport tags
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Hi,

Now sure I follow: Where TCP with DTLS for BFCP defined? Doesn’t TCP based BFCP run over TLS?

That is also what is used in RFC 4583.

As Roman has indicated, TCP/BFCP and TLS/BFCP won’t work on ICE. But, if you want to fix, don’t you then have to do more than just change the m- proto value? Don’t you have to define usage of the framing mechanism?

Regards,

Christer

From: Charles Eckel (eckelcu) [mailto:eckelcu@cisco.com]
Sent: 12 January 2017 17:52
To: Roman Shpount <roman@telurix.com>
Cc: Magnus Westerlund <magnus.westerlund@ericsson.com>om>; Paul Kyzivat <paul.kyzivat@comcast.net>et>; mmusic@ietf.org; Christer Holmberg <christer.holmberg@ericsson.com>
Subject: Re: [MMUSIC] Transport tags

Works for me.

Cheers,
Charles

From: Roman Shpount <roman@telurix.com<mailto:roman@telurix.com>>
Date: Wednesday, January 11, 2017 at 4:33 PM
To: Charles Eckel <eckelcu@cisco.com<mailto:eckelcu@cisco.com>>
Cc: Magnus Westerlund <magnus.westerlund@ericsson.com<mailto:magnus.westerlund@ericsson.com>>, Paul Kyzivat <paul.kyzivat@comcast.net<mailto:paul.kyzivat@comcast.net>>, "mmusic@ietf.org<mailto:mmusic@ietf.org>" <mmusic@ietf.org<mailto:mmusic@ietf.org>>, Christer Holmberg <christer.holmberg@ericsson.com<mailto:christer.holmberg@ericsson.com>>
Subject: Re: [MMUSIC] Transport tags

I guess BFCP will need TCP/DTLS/BFCP added to the list.

Should we correct draft-ietf-mmusic-sctp-sdp draft to match and change UDP/DTLS/SCTP to UDP/TLS/SCTP?

Regards,

_____________
Roman Shpount

On Wed, Jan 11, 2017 at 5:05 PM, Charles Eckel (eckelcu) <eckelcu@cisco.com<mailto:eckelcu@cisco.com>> wrote:
Here is what we have for BFCP in https://tools.ietf.org/html/draft-ietf-bfcpbis-rfc4583bis-16#section-13:

                       +--------------+------------+
                       | Value        | Reference  |
                       +--------------+------------+
                       | TCP/BFCP     | [RFC XXXX] |
                       | TCP/TLS/BFCP | [RFC XXXX] |
                       | UDP/BFCP     | [RFC XXXX] |
                       | UDP/TLS/BFCP | [RFC XXXX] |
                       +--------------+------------+

Cheers,
Charles

From: mmusic <mmusic-bounces@ietf.org<mailto:mmusic-bounces@ietf.org>> on behalf of Roman Shpount <roman@telurix.com<mailto:roman@telurix.com>>
Date: Wednesday, January 11, 2017 at 1:01 PM
To: Magnus Westerlund <magnus.westerlund@ericsson.com<mailto:magnus.westerlund@ericsson.com>>
Cc: Paul Kyzivat <paul.kyzivat@comcast.net<mailto:paul.kyzivat@comcast.net>>, "mmusic@ietf.org<mailto:mmusic@ietf.org>" <mmusic@ietf.org<mailto:mmusic@ietf.org>>
Subject: [MMUSIC] Transport tags

What should we use for the new protocols that we are defining?

Should it be UDP/TLS/SCTP or UDP/DTLS/SCTP?
Should it be UDP/TLS/BFCP or UDP/DTLS/BFCP?

I would like to see some consistency here.

Regards,
_____________
Roman Shpount

On Wed, Jan 11, 2017 at 3:30 AM, Magnus Westerlund <magnus.westerlund@ericsson.com<mailto:magnus.westerlund@ericsson.com>> wrote:
Den 2017-01-10 kl. 19:08, skrev Roman Shpount:
P.S. In the quoted text someone mentioned "UDP/TLS/RTP/SAVPF", should it
be "UDP/DTLS/RTP/SAVPF"?

No, actually UDP/TLS/RTP/SAVPF is what is registered for DTLS-SRTP over UDP with RTP SAVPF profile. See [RFC5764]. The "UDP/DTLS/RTP/SAVPF" is not registered.

So the alternatives for the dependency of default candidate protocol type in your proposal would be:

UDP: "UDP/TLS/RTP/SAVPF"
TCP: "TCP/DTLS/RTP/SAVPF"


Cheers

Magnus Westerlund

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