Re: [MMUSIC] BUNDLE: meaning of "unspecified" when describing "bundle-only"
Christer Holmberg <christer.holmberg@ericsson.com> Tue, 11 July 2017 13:46 UTC
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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Christer Holmberg <christer.holmberg@ericsson.com>, Adam Roach <adam@nostrum.com>, "mmusic@ietf.org" <mmusic@ietf.org>
Thread-Topic: [MMUSIC] BUNDLE: meaning of "unspecified" when describing "bundle-only"
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Date: Tue, 11 Jul 2017 13:46:23 +0000
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Subject: Re: [MMUSIC] BUNDLE: meaning of "unspecified" when describing "bundle-only"
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Hi, It took a while, but here is my suggestion (based on alternative #2): OLD TEXT: "The usage of the 'bundle-only' attribute is only defined for a bundled "m=" line with a zero port value, within an offer. Other usage is unspecified." NEW TEXT: "The usage of the 'bundle-only' attribute is only defined for a bundled "m=" line with a zero port value, within an offer. Other usage is unspecified. If an implementation receives, within an offer or answer, a bundled "m=“ line with a non-zero port value and an ‘bundle-only’ attribute associated with the “m=“ line, the implementation MUST ignore the attribute." Regards, Christer On 10/01/17 15:18, "mmusic on behalf of Christer Holmberg" <mmusic-bounces@ietf.org on behalf of christer.holmberg@ericsson.com> wrote: >Hi Adam, > >My suggestion would be alternative #2. Because, if an endpoint supports >the attribute it doesn¹t really matter what the port value is, so there is >no need to reject the m- line. > >Regards, > >Christer > > >On 29/12/16 23:15, "mmusic on behalf of Adam Roach" ><mmusic-bounces@ietf.org on behalf of adam@nostrum.com> wrote: > >>We've recently come across an issue with the way the "bundle-only" >>attribute is described in the current document. The current language >>regarding port handling reads: >> >> The usage of the 'bundle-only' attribute is only defined for a >> bundled "m=" line with a zero port value, within an offer. Other >> usage is unspecified. >> >>Usually, when we have this kind of language, we still ensure that >>behavior is well defined, to help avoid unnecessary interop failures. I >>see a couple of different options here: >> >> 1. Remove the final sentence and add language saying that creators of >> SDP MUST NOT include a "bundle-only" attribute in an m-section that >> has a non-zero port, and that recipients of such SDP {SHOULD,MUST} >> reject it; or >> >> 2. Retain language saying that including a "bundle-only" attribute in a >> non-zero m-section is unspecified, but add normative language along >> the lines of: "implementations that receive an m-section with a >> non-zero port that also contains a 'bundle-only' attribute MUST >> ignore the {attribute,port}." >> >>I don't have a preference between these choices, but I think we do need >>clarity. To be absolutely clear, this feedback is based on actual >>implementation interop failures in the field. This problem is not >>theoretical. >> >>/a >> >>_______________________________________________ >>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] BUNDLE: meaning of "unspecified" when de… Adam Roach
- Re: [MMUSIC] BUNDLE: meaning of "unspecified" whe… Christer Holmberg
- Re: [MMUSIC] BUNDLE: meaning of "unspecified" whe… Christer Holmberg
- Re: [MMUSIC] BUNDLE: meaning of "unspecified" whe… Christer Holmberg
- Re: [MMUSIC] BUNDLE: meaning of "unspecified" whe… Cullen Jennings