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Re: [PATCH v2] mac80211: tx: do not drop non-robust mgmt to non-MFP stas.

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On Wed, 2012-07-04 at 11:13 +0200, Nicolas Cavallari wrote:
> When drop_unencrypted is enabled and MFP is disabled, non-robust
> management frames for not-yet associated STA are dropped  before
> being transmitted.
> 
> This isn't visible as many management frames sent from  the kernel
> have TX_INTFL_DONT_ENCRYPT set and management frames injected from
> monitor vifs have TX_CTL_INJECTED set, so are never dropped in the
> tx path. But mgmt frames sent from userspace via NL80211_CMD_FRAME
> do not have any of these flags, so are dropped.
> 
> This patch make it accept non-robust management frames,
> but drops non-management frames and robust management frames as usual.
> 
> Signed-off-by: Nicolas Cavallari <cavallar@xxxxxx>
> 
> ---
> 
> Found this while trying to manage auth  frames in userspace
> on a IBSS RSN network.
> I'm  a bit surprised that drop_unencrypted is disabled both
> in AP and managed mode, but only enabled in IBSS RSN, which
> does not support MFP, yet.

Hmmm. Yes, all this seems a bit messy. Can we clean this up first?

Maybe something like this?
http://p.sipsolutions.net/d68a99dd3d9b1ab1.txt

The whole drop_unencrypted seems strange to start with though...

johannes

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