From: Michael Wu <flamingice@sourmilk.net>
To: andy@warmcat.com
Subject: Re: [PATCH 2/2] mac80211: Monitor mode radiotap-based packet injection
Date: Sat, 17 Mar 2007 17:51:46 -0400
Cc: linux-wireless@vger.kernel.org
References: <20070317105800.659633351@warmcat.com> <20070317110751.352850972@warmcat.com> <200703171730.33349.flamingice@sourmilk.net>
In-Reply-To: <200703171730.33349.flamingice@sourmilk.net>
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On Saturday 17 March 2007 17:30, Michael Wu wrote:
> > +		/* process and remove the injection radiotap header */
> > +
> > +	if(control->flags & IEEE80211_TXCTL_INJECTED_PACKET) {
>
> dev points to the virtual interface that the frame originally came in on.
> You can get sdata from that and figure out if the interface was a monitor
> interface.
>
Of course, this depends on ifindex being set properly.

You added:
	pkt_data->ifindex =3D  local->mdev->ifindex;

but in that same function, this is used instead:
	pkt_data->ifindex =3D sdata->dev->ifindex;

Which allows the master device to figure out which virtual interface the sk=
b=20
came from.

=2DMichael Wu

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