From:   Sven Eckelmann <sven@narfation.org>
To:     linux-wireless@vger.kernel.org,
        Roberto Riggio <roberto.riggio@gmail.com>
Subject: Re: Frame injection on ath9k
Date:   Fri, 10 Dec 2021 09:27:34 +0100
Message-ID: <4481549.kEIK8Ajiyv@ripper>
In-Reply-To: <CAKkT90b_C+B-2RY2BDO9tiQJh_Vv8y95JuVGADhc+ML-bSqxmQ@mail.gmail.com>
References: <CAKkT90b_C+B-2RY2BDO9tiQJh_Vv8y95JuVGADhc+ML-bSqxmQ@mail.gmail.com>
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From: Sven Eckelmann <sven@narfation.org>
To: linux-wireless@vger.kernel.org, Roberto Riggio <roberto.riggio@gmail.com>
Subject: Re: Frame injection on ath9k
Date: Fri, 10 Dec 2021 09:27:34 +0100
Message-ID: <4481549.kEIK8Ajiyv@ripper>
In-Reply-To: <CAKkT90b_C+B-2RY2BDO9tiQJh_Vv8y95JuVGADhc+ML-bSqxmQ@mail.gmail.com>
References: <CAKkT90b_C+B-2RY2BDO9tiQJh_Vv8y95JuVGADhc+ML-bSqxmQ@mail.gmail.com>

On Thursday, 9 December 2021 15:41:03 CET Roberto Riggio wrote:
> Could somebody be so kind to provide me with some pointers about
> where the frame injection at arbitrary rates from a radiotap header is
> implemented now?

Not in ath9k - it is in net/mac80211/tx.c. The function 
ieee80211_parse_tx_radiotap will inspect the radiotap header and set the flag 
IEEE80211_TX_CTRL_RATE_INJECT if it was able to retrieve some rates from it.

And ieee80211_tx_h_rate_ctrl will just not try to calculate new rates when 
they were already injected by the radiotap header (see 
IEEE80211_TX_CTRL_RATE_INJECT).

Kind regards,
	Sven
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