Re: [AVTCORE] Errata on RFC 5764 (Errata 3913)

[Magnus Westerlund <[e-mail]>]

On 2015-01-30 03:38, Dale R. Worley wrote:
> Magnus Westerlund <[e-mail]> writes:
>> I think a reasonable handling of this one would
>> be to put it into the "Held for Documents Update" category.
> 
> This makes sense to me, but I think the following sentence is not as
> informative as it needs to be:  "STUN messages with methods identifiers
> of 1280 or higher cannot be demultiplexed."  The statement should tell
> what happens, e.g., "STUN messages with method identifiers of 1280 or
> higher are indistinguishable from ***, so such method identifiers must
> be avoided when ***."
> 

Sounds good, if we prepare a replacement for the note, I believe the AD
can edit the Errata.


OLD NEW Text:

Arriving packets may be of types RTP, DTLS, or STUN [RFC5389].
STUN messages with methods identifiers of 1280 or higher cannot
be demultiplexed.
...
                   |       B < 20  -+--> forward to STUN
...
If the value of this byte is less than 20, then the packet is STUN.


New NEW Text:
Arriving packets may be of types RTP, DTLS, or STUN [RFC5389].
STUN messages with method identifiers of 1280 or higher are
indistinguishable from DTLS so such method identifiers must
be avoided when multiplexing the protocols on the same 5-tuple.
...
                   |       B < 20  -+--> forward to STUN
...
If the value of this byte is less than 20, then the packet is STUN.


END OF CHANGE

I also note that one potential critique to accepting it in the current
form, is the issue Cullen raised if we really should assign all of the
0-19 space to STUN or keep that space more limited.

Cheers

Magnus Westerlund

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