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Re: [MMUSIC] [bfcpbis] m= line protocol in case of ICE

Christer Holmberg <christer.holmberg@ericsson.com> Tue, 29 November 2016 19:31 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Roman Shpount <roman@telurix.com>, "Charles Eckel (eckelcu)" <eckelcu@cisco.com>
Thread-Topic: [bfcpbis] [MMUSIC] m= line protocol in case of ICE
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Date: Tue, 29 Nov 2016 19:31:10 +0000
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Subject: Re: [MMUSIC] [bfcpbis] m= line protocol in case of ICE
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I also agree.

More generally, I suggest that ANY protocol supporting ICE should always have a MTI transport, which in the case of ICE-SDP also MUST be used as default candidate. That way we would avoid offers with m- line transport values not supported by the answerer.

Regards,

Christer

From: Roman Shpount [mailto:roman@telurix.com]
Sent: 29 November 2016 20:38
To: Charles Eckel (eckelcu) <eckelcu@cisco.com>
Cc: Alan Ford <alan.ford@gmail.com>; bfcpbis@ietf.org; ice@ietf.org; mmusic@ietf.org; Christer Holmberg <christer.holmberg@ericsson.com>
Subject: Re: [bfcpbis] [MMUSIC] m= line protocol in case of ICE

On Tue, Nov 29, 2016 at 12:48 PM, Charles Eckel (eckelcu) <eckelcu@cisco.com<mailto:eckelcu@cisco.com>> wrote:
It seems to me that the most straightforward approach would be to mandate support for BFCP over UDP when using ICE, use UDP as the default candidate, and signal the BFCP m-line as if it is BFCP over UDP. If we can mandate the use of DTLS, that would be even better.
Thoughts?


I agree.

The only issue that I still have, if DTLS is not used, what protocol is used when ICE tcp candidate is selected for transport. Is this TCP/BFCP (which goes against RFC6544)  or is it UDP/BFCP with RFC4571 framing? If it is UDP/BFCP with RFC4571 framing, what transport tag should be used in the re-INVITE which is sent after ICE nomination with only selected candidate? Should it be TCP/UDP/BFCP or something similar?

Regards,
_____________
Roman Shpount

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