Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP SDP syntax question
Paul Kyzivat <pkyzivat@alum.mit.edu> Thu, 02 October 2014 01:37 UTC
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Date: Wed, 01 Oct 2014 21:36:56 -0400
From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Subject: Re: [MMUSIC] draft-ietf-mmusic-sctp-sdp-07 SCTP SDP syntax question
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On 10/1/14 7:57 PM, Christian Groves wrote: > What is the status of the draft-ejzak-mmusic-data-channel-sdpneg-00? I don't know the status. The thought Keith Drage had indicated that he was picking up responsibility for it. Thanks, Paul > 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 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