Re: [MMUSIC] Associating packets with m-lines in a bundle

[[e-mail] (Dale R. Worley)]

> From: Paul Kyzivat <[e-mail]>
> 
> IMO the following should obviously be a truism. I want to know if all agree.
> 
> If an O/A exchange negotiates a bundle with multiple m-lines,
> then attributes in those m-lines and the associated media sections must 
> provide sufficient information to associate each incoming packet on the 
> 5-tuple to exactly *one* of those m-lines.

I agree.  I think there are non-legacy situations where this need may
be relaxed, but all interoperation in legacy situations seems to
require discerning the appropriate m= line so information in the SDP
section can be used to identify the particular application processing
stream.

> [...] receiving packets that don't match any of the m-lines. I 
> think we ought to address that, by defining some syntax to specify what 
> to do with packets that don't match any m-line. This might be to specify 
> one m-line as the default, or that packets that don't match be discarded.

I think that discarding them is the only workable approach.  There's
no reason to assume that sending them to a default m= line would allow
the upper level of demultiplexing to succeed.

Dale