Re: [MMUSIC] Data channel dcsa attribute usage and IANA - the pull request
Christer Holmberg <christer.holmberg@ericsson.com> Thu, 29 August 2019 12:47 UTC
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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: "mmusic@ietf.org" <mmusic@ietf.org>
CC: "Roni Even (A)" <roni.even@huawei.com>, "pkyzivat@alum.mit.edu" <pkyzivat@alum.mit.edu>, Gunnar Hellstrom <gunnar.hellstrom@omnitor.se>
Thread-Topic: [MMUSIC] Data channel dcsa attribute usage and IANA - the pull request
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Date: Thu, 29 Aug 2019 12:47:35 +0000
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Subject: Re: [MMUSIC] Data channel dcsa attribute usage and IANA - the pull request
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Hi, I have created a pull request that: 1. Describes including the SDP media direction attributes in dcsa attributes 2. Adds the IANA registry updates for the SDP attributes that can be included in dcsa attributes 3. Minor nit fixes, found by Gunnar and myself https://github.com/cdh4u/draft-datachannel-t140/pull/6 Regards, Christer From: "Roni Even (A)" <roni.even@huawei.com> Date: Thursday, 29 August 2019 at 12.50 To: Christer Holmberg <christer.holmberg@ericsson.com>, "mmusic@ietf.org" <mmusic@ietf.org>, "pkyzivat@alum.mit.edu" <pkyzivat@alum.mit.edu> Cc: "mmusic-chairs@ietf.org" <mmusic-chairs@ietf.org> Subject: RE: [MMUSIC] Data channel dcsa attribute usage and IANA Hi, I think that dcsa(subprotocol) would have been enough, at least based on channel-sdpneg document, maybe Paul can help Roni From: Christer Holmberg [mailto:christer.holmberg@ericsson.com] Sent: Thursday, August 29, 2019 12:25 PM To: Roni Even (A); mmusic@ietf.org; pkyzivat@alum.mit.edu Cc: mmusic-chairs@ietf.org Subject: Re: [MMUSIC] Data channel dcsa attribute usage and IANA Hi, One question for clarification: Section 8.2.4.1 of RFC4566bis says: “Usage Level: Usage level(s) of the attribute. This MUST be one or more of the following: session, media, source, dcsa and dcsa(subprotocol).” …and in the Table in Section 8.2.4 it says: “dcsa,dcsa(msrp)” Q1: Why does it need to say both ‘dcsa’ and ‘dcsa(subprotocol)’? Isn’t it enough with ‘dcsa(subprotocol)’? Regards, Christer From: mmusic <mmusic-bounces@ietf.org<mailto:mmusic-bounces@ietf.org>> on behalf of Christer Holmberg <christer.holmberg@ericsson.com<mailto:christer.holmberg@ericsson.com>> Date: Thursday, 29 August 2019 at 11.27 To: "Roni Even (A)" <roni.even@huawei.com<mailto:roni.even@huawei.com>>, "mmusic@ietf.org<mailto:mmusic@ietf.org>" <mmusic@ietf.org<mailto:mmusic@ietf.org>> Cc: "mmusic-chairs@ietf.org<mailto:mmusic-chairs@ietf.org>" <mmusic-chairs@ietf.org<mailto:mmusic-chairs@ietf.org>> Subject: Re: [MMUSIC] Data channel dcsa attribute usage and IANA Hi, Thanks for the information! The last paragraph clarifies it. So, draft-t140-usage-data-channel will update the IANA registry for the SDP attributes used inside the SDP dcsa attribute. Regards, Christer From: "Roni Even (A)" <roni.even@huawei.com<mailto:roni.even@huawei.com>> Date: Thursday, 29 August 2019 at 11.08 To: Christer Holmberg <christer.holmberg@ericsson.com<mailto:christer.holmberg@ericsson.com>>, "mmusic@ietf.org<mailto:mmusic@ietf.org>" <mmusic@ietf.org<mailto:mmusic@ietf.org>> Cc: "mmusic-chairs@ietf.org<mailto:mmusic-chairs@ietf.org>" <mmusic-chairs@ietf.org<mailto:mmusic-chairs@ietf.org>> Subject: RE: Data channel dcsa attribute usage and IANA Hi Christer, To add to Paul’s response Look at the last 2 paragraphs of section 5.2.1 https://tools.ietf.org/html/draft-ietf-mmusic-data-channel-sdpneg-28#section-5.2.1 Roni From: mmusic [mailto:mmusic-bounces@ietf.org] On Behalf Of Christer Holmberg Sent: Wednesday, August 28, 2019 1:33 PM To: mmusic@ietf.org<mailto:mmusic@ietf.org> Cc: mmusic-chairs@ietf.org<mailto:mmusic-chairs@ietf.org> Subject: [MMUSIC] Data channel dcsa attribute usage and IANA Hi, Section 7.2 of draft-ietf-mmusic-msrp-usage-data-channel updates the IANA registry for the SDP ‘setup’ attribute, by indicating that it can be used inside an SDP ‘dcsa’ attribute. Do we really need to update the IANA registry for all SDP attributes that can be included in an ‘dcsa’ attribute??? There is no text in draft-mmusic-data-channel-neg about having to modify the IANA registry for such attributes. Regards, Christer
- Re: [MMUSIC] Data channel dcsa attribute usage an… Christer Holmberg