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Re: set channel from radiotap headers during injection

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On Tue, Aug 25, 2015 at 2:36 AM, Johannes Berg
<johannes@xxxxxxxxxxxxxxxx> wrote:
> It's ... complicated. First of all, it's currently not supported I
> believe, in general, since there's no parsing code. Obviously, parsing
> code can be changed, and I think there might even be patches floating
> around for that.

Adding this into the parse_tx_radiotap() is pretty trivial, I've added
MCS and legacy bitrate, FEC, SGI and STBC controls already.  I just
don't quite know where to put transmit power.

> However, not all hardware supports per-frame TX power control. Some
> might, most will not. Until fairly recently, there was also no API with
> drivers to allow setting TX power per frame. This changed with the
> addition of TX power control to rate control, of course.

I'm currently working with ath9k.  It appears that it supports
per-frame power control, although I'm still familiarizing myself.

Where would I stick the transmit power control?  In the
ieee80211_tx_info->control somewhere, or maybe in the
ieee80211_tx_info->rate_driver_data?
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