Re: Q and L loss bits: which is which?

[<[e-mail]>]

Hello Dmitri,

Thanks for your offer: experimentations are very welcome !
You're right we forgot to just define which is what, we'll fix the
draft shortly. We'll choose: 0x10 for Q and 0x08 for L.
This means the first byte layout becomes:
 |0|1|S|Q|L|K|P P|

Note the WG meeting yesterday concluded these should be controlled by a
negotiated option. But in the meantime, that does not prevent you from
running an experiment as long as you also modify the client, so that it
does not enforce the drafted constraint on the reserved bits.


On Tue, 2019-11-19 at 09:32 -0500, Dmitri Tikhonov wrote:
> Hello,
> 
> I've read the loss bits draft [1] and the basic functionality (a
> single
> counter per connection, ignoring the per-CID or per-tuple nuances) is
> very doable.  I can set up a separate public endpoint that generates
> these bits for experimentation.
> 
> One stumbling block is that the draft does not specify which short
> header
> R bit [2] is L and which is Q.
> 
>   - Dmitri.
> 
> 1. https://tools.ietf.org/html/draft-ferrieuxhamchaoui-quic-lossbits-
> 02
> 2. https://tools.ietf.org/html/draft-ietf-quic-transport-24#section-1
> 7.3
> 

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