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Re: [MMUSIC] Mismatch between sdp-bundle-negotiation and RFC5888

Roman Shpount <roman@telurix.com> Wed, 28 November 2018 18:05 UTC

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From: Roman Shpount <roman@telurix.com>
Date: Wed, 28 Nov 2018 13:05:36 -0500
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To: Christer Holmberg <christer.holmberg@ericsson.com>
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Subject: Re: [MMUSIC] Mismatch between sdp-bundle-negotiation and RFC5888
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On Wed, Nov 28, 2018 at 3:40 AM Christer Holmberg <
christer.holmberg@ericsson.com> wrote:

> > I know this is a really late notice, but I think there is a slight
> mismatch between RFC5888 and sdp-bundle.
>
> >
>
> > RFC 5888 Section 9.2 (https://tools.ietf.org/html/rfc5888#section-9.2)
> says:
>
> >
>
> >   SIP entities refuse media streams by setting the port to zero in the
> corresponding "m" line. "a=group" lines MUST NOT
>
> >   contain identification-tags that correspond to "m" lines with the
> port set to zero.
>
> >
>
> > Considering that sdp-bundle redefines the meaning of port zero when
> 'bundle-only' attribute is present, RFC5888 will need
>
> > to be updated to allow including bundle-only media streams in the
> "a=group" lines.
>
>
>
> …or, one could argue that the text in RFC5888 only applies to the case
> when port zero is used to refuse a media stream.
>
>
>
One could argue this, but the language in RFC 5888 is quite blunt.
_____________
Roman Shpount

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