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Subject: [rfc] INJECT mode for net80211
From: Adrian Chadd <adrian@freebsd.org>
To: "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org>, 
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Hi!

I kinda got fed up with the lack of functioning inject.

* monitor mode isn't inject mode;
* ahdemo mode seems .. less useful.

So I just created IEEE80211_M_INJECT and taught net80211 / ath about
it. This is like monitor mode (straight to RUN, no need to set an
SSID, no auto scanning by default) but it allows transmit and
populates the node table with temporary node entries.

So:

http://people.freebsd.org/~adrian/ath/20140809-net80211-ath-inject-1.diff

I'd like to commit this in the next couple of days.

I've also tested this with aircrack-ng - the built port didn't work
with monitor mode modified to inject frames. I don't know why. Rebuilt
from source worked fine. I've just modified my local copy to set the
IFM_IEEE80211_INJECT flag rather than monitor flag and it seems it's
all okay.

The only issue I've seen with packet injection is that aircrack-ng
isn't waiting until the interface is up before trying to send frames,
so some are rejected rather than buffered.



-a