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Re: [MMUSIC] BUNDLE Weekly Summary: Assumptions

Jonathan Lennox <jonathan@vidyo.com> Fri, 10 May 2013 22:45 UTC

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From: Jonathan Lennox <jonathan@vidyo.com>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>
Date: Fri, 10 May 2013 18:44:50 -0400
Thread-Topic: [MMUSIC] BUNDLE Weekly Summary: Assumptions
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Subject: Re: [MMUSIC] BUNDLE Weekly Summary: Assumptions
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On May 10, 2013, at 6:25 PM, Paul Kyzivat wrote:

> On 5/10/13 6:17 PM, Eric Rescorla wrote:
>> 
>> 
>> On Fri, May 10, 2013 at 3:16 PM, Martin Thomson
>> <martin.thomson@gmail.com <mailto:martin.thomson@gmail.com>> wrote:
>> 
>>    On 10 May 2013 15:05, Eric Rescorla <ekr@rtfm.com
>>    <mailto:ekr@rtfm.com>> wrote:
>>> I'm sorry to be slow today, but can you point me to the specific
>>    MUST NOT in
>>> RFC 5888.
>> 
>>    I struggled to find it too.  It's in 9.2:
>> 
>>        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.
>> 
>> 
>> This feels like something we could relax for the offer.
> 
> We could relax it. The question is if the change will break any existing 
> use. That is a hard question to answer.

We could say that whether it's valid must be defined by the group semantic, and for all existing group semantics it's not.

--
Jonathan Lennox
jonathan@vidyo.com

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