Re: Proposed Tx flag: don't reorder frames

On Fri, 2020-07-24 at 09:58 +0400, Mathy Vanhoef wrote:

> I propose to add a DONT_REORDER bit to the existing TX flags field.
> When this flag is set, injected frames shouldn't be reordered relative
> to other frames that also have this flag set (even when these frames
> have different QoS TID values).
> 
> This for example allows userspace to inject frames that have different
> QoS TID fields while assuring that they are transmitted in the order
> as they were injected. In practice this is useful to perform certain
> experiments where the order of transmitted frames is important.

Interesting.

> Note that on the radiotap website the TX flags field is still listed
> under the "suggested fields" page, but I'm assuming that by now this
> field is approved (since it's used in Linux)?

No, it never was. I made an attempt at some point, but abandoned it for
some reason.

I see no reason why it couldn't be done though, and I guess this new
flag could be included from the start.

johannes