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Re: [rtcweb] RTCWEB Data Channel: Usage of PPID for protocol multiplexing

Michael Tuexen <Michael.Tuexen@lurchi.franken.de> Thu, 06 February 2014 19:30 UTC

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From: Michael Tuexen <Michael.Tuexen@lurchi.franken.de>
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Date: Thu, 06 Feb 2014 20:30:42 +0100
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To: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Subject: Re: [rtcweb] RTCWEB Data Channel: Usage of PPID for protocol multiplexing
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On Feb 6, 2014, at 5:26 PM, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:

> On 2/6/14 3:45 AM, Michael Tuexen wrote:
>> On Feb 6, 2014, at 9:36 AM, Christer Holmberg <christer.holmberg@ericsson.com> wrote:
>> 
>>> Hi,
>>> 
>>>>>> As discussed in the last IETF meeting, this PPID based fragmentation and reassembly will be removed from the ID.
>>>>> 
>>>>> I assume the associated PPID values will also be un-registered with IANA?
>>>> I guess they will stay... They are supported by Firefox and PPIDs are a pretty cheap resource. They are from a pool of 32-bit entities. That is why we registered the values before the RFCs get published.
>>> 
>>> So, does that mean my WebRTC entity has to support them, in case the remote peer is on Firefox?
>> I don't think so. Not sure what the plan for Firefox is, but I expect Firefox to change the
>> code as soon as the final solution is specified.
>>> 
>>> Also, if they are removed from the data channel draft, what reference will be used in the IANA table?
>> I think it will stay. For PPIDs you even don't have to have an RFC. You can even register PPIDs
>> as a person.
> 
> I hope that if values are retained simply for backward compatibility they are explicitly marked as deprecated.
My plan was just not to defined what they are used for...

Best regards
Michael
> 
> 	Thanks,
> 	Paul
> 
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