Subject: Re: [MMUSIC] Re: draft-ietf-mmusic-sdp-new-20

From: Colin Perkins <[email-masked]>
Date: Sun, 3 Oct 2004 17:11:04 +0100

On 27 Sep 2004, at 11:59, sunil bhargo wrote:
>     in the following paragraph for the unicast IP
> sessions :-
> 1. In section 4.1 it is mentioned for unicast sessions
>
> "The semantics of this address and port depend on the
> media and transport protocol defined.  By default,
> this SHOULD be the remote address and remote port to
> which data is sent."
>
>     but how can the sender identify which port the
> receiver is ready to ready to receive the data on.

An offer/answer exchange, or some similar means, outside the scope of 
SDP.

> 2. also in section 5 it is mentioned that
>
>   " An SDP session description consists of a
> session-level section followed by zero or more
> media-level sections. "
>        this implies that the m= line is OPTIONAL.
>       but then in the same section where the
> differentiation of REQUIRED and OPTIONAL fields is
> given
> Media description
>          m=  (media name and transport address)
>   m= does not contain the '*" field  which means it is
> essential but this contradicts the earlier statement.

The "m=" line is mandatory if a media description is present, although 
the entire media description is optional. Would it clarify if the 
description before the list was changed to "OPTIONAL items in each 
section are marked with a *"?

Colin

_______________________________________________
mmusic mailing list
[email-masked]
https://www1.ietf.org/mailman/listinfo/mmusic