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Re: Does mac80211 guarantee no data frames are sent to driver until encryption is setup?

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On 13 November 2015 at 01:59, Ben Greear <greearb@xxxxxxxxxxxxxxx> wrote:
> A certain firmware tries to do EAPOL inspection and only allow data pkts
> to be sent after the 4-way M4 has been sent, for instance.
>
> This was breaking .11r because in that case you don't do the 4-way after
> roaming, so the firmware was waiting forever for an M4 to be sent and
> thus all tx data was hung.
>
> I managed to get this working by just removing all of the EAPOL inspection
> from the firmware,
> but I am thinking that if the stack will send data packets to the driver
> before 4-way auth is completed and keys are set, then maybe I would
> be opening up a race where un-encrypted frames could hit the air.
>
> Any idea what protections, if any, the mac80211 stack provides
> for this case?
>
Check WLAN_STA_AUTHORIZED in mac80211.

BR
Janusz
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