Re: [MMUSIC] WGLC on draft-ietf-mmusic-rfc8843bis-00

[Roman Shpount <[e-mail]>]

Let me be more specific -- I meant rules defined for initial SDP offer in
https://www.ietf.org/archive/id/draft-ietf-mmusic-rfc8843bis-02.html#section-7.2,
not all rules for initial SDP offers. Specifically, all m= lines should
either have a different address:port for each bundled m= line and be
prepared to receive media on these addresses or should have port 0 and
a=bundle-only
_____________
Roman Shpount


On Fri, Jun 18, 2021 at 1:07 PM Paul Kyzivat <[e-mail]>
wrote:

> On 6/18/21 12:28 PM, Roman Shpount wrote:
> > I was looking for some sort of language or note similar to
> > https://datatracker.ietf.org/doc/html/rfc8839#section-7.5
> > <https://datatracker.ietf.org/doc/html/rfc8839#section-7.5>. This note
> > should say that when the endpoint receives a mid-dialog re-INVITE that
> > contains no offer, it MUST use the rules for generating the initial SDP
> > offers
>
> It isn't quite that simple. There are additional rules for mid-dialog
> offers. In particular payload types may not be recycled for use with a
> different codec configuration than it was previously used for. I think
> there are other limitations along the same vein.
>
> There could be something with a similar spirit.
>
>         Thanks,
>         Paul
>
> > (
> https://www.ietf.org/archive/id/draft-ietf-mmusic-rfc8843bis-02.html#section-7.2
> > <
> https://www.ietf.org/archive/id/draft-ietf-mmusic-rfc8843bis-02.html#section-7.2>)t;).
>
> > In some sense, we are preserving RFC8843 behavior for subsequent offers
> > if these offers are generated due to a mid-dialog re-INVITE that
> > contains no offer.
> >
> > Best Regards,
> > _____________
> > Roman Shpount
> >
> >
> > On Fri, Jun 18, 2021 at 12:17 PM Paul Kyzivat <[e-mail]
> > <mailto:[e-mail]>> wrote:
> >
> >     On 6/18/21 2:52 AM, Christer Holmberg wrote:
> >      > Hi Roman,
> >      >
> >      > Regarding offers for 3PPC, I think sending an initial offer needs
> >     to be
> >      > a generic O/A rule. I don’t think we can have SDP
> >     extension-specific rules.
> >
> >     I agree this *ought* to be a generic recommendation. But I don't
> think
> >     it is. So I think it would be helpful to say it in this document.
> >
> >     Note that this would be a recommendation (MAY). It can't really be
> >     mandatory, since for an initial offer the offerer has almost complete
> >     discretion.
> >
> >              Thanks,
> >              Paul
> >
> >      > Regards,
> >      >
> >      > Christer
> >      >
> >      > Get Outlook for iOS <https://aka.ms/o0ukef <https://aka.ms/o0ukef
> >>
> >      >
> >
>  ------------------------------------------------------------------------
> >      > *From:* Roman Shpount <[e-mail] <mailto:
> [e-mail]>>
> >      > *Sent:* Thursday, June 17, 2021 11:40:50 PM
> >      > *To:* Flemming Andreasen <fandreas=[e-mail]
> >     <mailto:[e-mail]>>; Christer
> >      > Holmberg <[e-mail]
> >     <mailto:[e-mail]>>
> >      > *Cc:* mmusic <[e-mail] <mailto:[e-mail]>>
> >      > *Subject:* Re: [MMUSIC] WGLC on draft-ietf-mmusic-rfc8843bis-00
> >      > Hi Christer,
> >      >
> >      > I have reviewed the document and document changes look good in
> >     removing
> >      > the inconsistencies with JSEP.
> >      >
> >      > One question that I do have is related to third-party call
> >     control and
> >      > generating offers in response to INVITE with no SDP body. This is
> >     not
> >      > covered anywhere in this document. In order to work correctly thes
> >      > offers should be constructed the same ways as initial offers with
> >      > separate addresses and ports allocated for all m= lines which are
> >     not
> >      > bundle-only and port zero and bundle-only attribute set on all the
> >      > bundle-only m= lines.
> >      >
> >      > Best Regards,
> >      > _____________
> >      > Roman Shpount
> >      >
> >      >
> >      > On Tue, May 18, 2021 at 2:09 PM Flemming Andreasen
> >      > <fandreas=[e-mail]
> >     <mailto:[e-mail]>
> >      > <mailto:[e-mail]
> >     <mailto:[e-mail]>>> wrote:
> >      >
> >      >     Greetings MMUSIC
> >      >
> >      >     This is to announce a 2 week WGLC on the draft:
> >      >
> >      >
> >     https://www.ietf.org/archive/id/draft-ietf-mmusic-rfc8843bis-00.txt
> >     <https://www.ietf.org/archive/id/draft-ietf-mmusic-rfc8843bis-00.txt
> >
> >      >
> >       <
> https://www.ietf.org/archive/id/draft-ietf-mmusic-rfc8843bis-00.txt <
> https://www.ietf.org/archive/id/draft-ietf-mmusic-rfc8843bis-00.txt>>
> >      >
> >      >     as Proposed Standard. Please note that changes in the
> >     document are
> >      >     limited to what was agreed to at IET110 for JSEP alignment
> >     plus any
> >      >     verified erratas. Please review and provide any comments you
> may
> >      >     have on the document by Tuesday, June 1, 2021. Comments
> should be
> >      >     sent to the document authors and the MMUSIC WG list. If you
> >     review
> >      >     the document but do not have any comments, please send a note
> to
> >      >     that effect as well.
> >      >
> >      >     Thanks
> >      >
> >      >     -- Flemming (MMUSIC co-chair)
> >      >     _______________________________________________
> >      >     mmusic mailing list
> >      > [e-mail] <mailto:[e-mail]> <mailto:[e-mail]
> >     <mailto:[e-mail]>>
> >      > https://www.ietf.org/mailman/listinfo/mmusic
> >     <https://www.ietf.org/mailman/listinfo/mmusic>
> >      >     <https://www.ietf.org/mailman/listinfo/mmusic
> >     <https://www.ietf.org/mailman/listinfo/mmusic>>
> >      >
> >      >
> >      > _______________________________________________
> >      > mmusic mailing list
> >      > [e-mail] <mailto:[e-mail]>
> >      > https://www.ietf.org/mailman/listinfo/mmusic
> >     <https://www.ietf.org/mailman/listinfo/mmusic>
> >      >
> >
> >     _______________________________________________
> >     mmusic mailing list
> >     [e-mail] <mailto:[e-mail]>
> >     https://www.ietf.org/mailman/listinfo/mmusic
> >     <https://www.ietf.org/mailman/listinfo/mmusic>
> >
> >
> > _______________________________________________
> > mmusic mailing list
> > [e-mail]
> > https://www.ietf.org/mailman/listinfo/mmusic
> >
>
> _______________________________________________
> mmusic mailing list
> [e-mail]
> https://www.ietf.org/mailman/listinfo/mmusic
>