Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP SDP syntax question
Christian Groves <Christian.Groves@nteczone.com> Wed, 01 October 2014 23:57 UTC
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Date: Thu, 02 Oct 2014 09:57:02 +1000
From: Christian Groves <Christian.Groves@nteczone.com>
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Archived-At: http://mailarchive.ietf.org/arch/msg/mmusic/o6kIh5Bb5u65w-P0sg3JW3Ik-SI
Subject: Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP SDP syntax question
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What is the status of the draft-ejzak-mmusic-data-channel-sdpneg-00? It has expired and is based on the old SDP SCTP syntax. Particularly the example in cl.4: m=application 54111 DTLS/SCTP 5000 5001 5002 c=IN IP4 79.97.215.79 a=sctpmap:5000 webrtc-datachannel a=sctpmap:5001 bfcp a=sctpmap:5002 t38 Wouldn't apply if we're saying to use multiple m-lines. I guess cl.5.1.1.3 would use the same Websocket subprotocol name registry as data channel does? Regards, Christian On 2/10/2014 12:14 AM, Paul Kyzivat wrote: > On 10/1/14 3:44 AM, Christian Groves wrote: > >>> <Sal> >>> there have been several discussion about the ability to have more than >>> one usage of the SCTP association, >>> and has been agreed not to allow it. >>> So each 'm' line describes a single SCTP association; each >>> association has only one single specify usage. >>> </Sal> >> >> [CNG] So how would I specify in SDP a scenario where BFCP uses a >> DTLS/SCTP association and MSRP uses a DTLS/SCTP association where they >> both use the same DTLS connection? Are these to be separate m-lines? > > To have two different SCTP associations over the same DTLS connection, > they would have to be distinguished by sctp-port. To achieve that you > could write two m-lines. They would share the same ip address and > port, and would have different "a=sctp-port" lines. Then they would > have to be bundled. > > Doing that would require extending the definition of bundle to cover > that case. (There is no *technical* problem in doing this.) > > OTOH, in principle they don't need their own SCTP association. AFAIK > they each only use one sctp stream-pair (channel). If they could agree > on how to choose channels then they could share an SCTP association. > That is where draft-ejzak... comes in. > > Thanks, > Paul > > _______________________________________________ > mmusic mailing list > mmusic@ietf.org > https://www.ietf.org/mailman/listinfo/mmusic >
- [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP SDP s… Christian Groves
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christian Groves
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Salvatore Loreto
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christian Groves
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christer Holmberg
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Schwarz, Albrecht (Albrecht)
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christer Holmberg
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Paul Kyzivat
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Paul Kyzivat
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Paul Kyzivat
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christian Groves
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christian Groves
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Paul Kyzivat
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christian Groves
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christian Groves
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Paul Kyzivat
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Paul Kyzivat
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christer Holmberg
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christer Holmberg
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christer Holmberg
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christer Holmberg
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Paul Kyzivat
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Paul Kyzivat
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christian Groves
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christian Groves
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christer Holmberg
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Makaraju, Maridi Raju (Raju)
- Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP S… Christer Holmberg