Please don't puke: Modifying Frame Version, Beacon and Probe-Response values

[Michal Kazior]

On 31 May 2016 at 10:44, jpo <pommnitz at yahoo.com> wrote:
> Hello all,
> to implement a "Stealth feature", e.g. the WLAN network does not show up in
> normal Scans, we modified the Frame version, Beacon and Probe-Response
> values for an old ATH5K card running on the now dormant Madwifi driver.
> Question: Is the same thing even POSSIBLE with ath10k? My main concern is,
> that the firmware just won't handle non-standard values.
>
> Can somebody who understands the division of labor between mac80211, ath10k,
> the firmware and the hardware suppress his or her gag reflex long enough to
> think about this?

First and foremost you'll need to use firmware with "raw-mode" support
- otherwise firmware just craps over frame headers. Some 10.2.4
support it - you can look into the mailing list archive for some
discussions.

Not sure if Rx will work though as firmware-controlled Rx filters may
prevent you from receiving frames with crazy frame_control values.
You'll need to check this out yourself. Some firmware revisions might
have RX_FILTER wmi command support but this isn't used/documented
anywhere and it's questionable how much it allows you to override.

Whatever you find it'd be nice if you post whatever you find out (for
posterity :)


Michał