On 30-11-2016 9:22, Johannes Berg wrote:

On Mon, 2016-11-28 at 21:07 +0100, Arend Van Spriel wrote:

quoted

 
I was wondering about the meaning of the term "parent_bssid". Given
your remark it means something else than my guess. I actually meant
the distance to the AP indicated by this BSS. Our gscan code obtains
the gscan results from firmware and in that API it has RTT info. 

Oh, ok. Right, that's unrelated to the parent_bssid.

I do wonder how it'd even be possible to *determine* this though?
Perhaps by the ACK timing, assuming it's precise on the AP?

There is 11v, 11mc, and some proprietary flavor we call 1-way TOF.
However, I do not expect those measurements to be done during the scan
procedure as it would affect duration of the whole scan exercise.

quoted

However, recent testing revealed those fields are always coming up
with zero values :-(

Heh :-)

quoted

So right now I am not sure if we need this extension.

FWIW, we don't seem to have it.

I will drop this in next RFC round.

Regards,
Arend