Re: Using ath5k/ath9k radio for constant-tx noise source.

[Zefir Kurtisi <zefir.kurtisi@neratec.com>]

On 08/19/2015 09:07 PM, Ben Greear wrote:
> I have a commercial AP that is using a CM9 ath5k radio (evidently, I could be wrong)
> and it has the ability to do a constant transmit of raw noise (RF probe shows
> noise, but a monitor-port sniffer does not see any frames from the CM9).
> 
> I don't know the low-level details of how it is doing this, but I suspect
> it is using something like madwifi for a driver.
> 
> Does anyone know how this can be done with modern software and
> ath5k or ath9k NICs?
> 
> Thanks,
> Ben
> 

Maybe slightly related: some years ago when DFS became a topic and it was hard to
get hands on radar pattern generators, Christian Lamparter wrote a variant of the
carl9170 fw [1] which can generate radar pulses to test ath9k and other DFS radar
detectors. Pulses are generated by enabling txout at defined sampling intervals.

It should be doable to mimic what you are looking for by generating a _very_ long
pulse.


Good Luck,
Zefir


[1] https://github.com/chunkeey/carl9170fw/tree/radar