On Wed, 2011-09-14 at 19:32 +0200, Christian Lamparter wrote:
> On Wednesday, September 14, 2011 01:19:59 PM Harshal Chhaya wrote:
> > Most of the disconnects seem to be caused by beacons that update the
> > TIM IE but not the overall length. The result is a corrupted RSN IE
> > (e.g. the IE length says 20 bytes but the IE is only 19 bytes in size)
> > which causes the clients to disconnect. This problem lasts for only
> > one beacon (i.e. the next beacon has the right size) but it is enough
> > to cause the clients to disconnect. Is there a way to fix this?
> Now that is really interesting. Do you know if the TIM IE is generated
> properly by ieee80211_beacon_add_tim in net/mac80211/tx.c?
Hm, looking at that code, is it really correct?
tim = pos = (u8 *) skb_put(skb, 6);
*pos++ = WLAN_EID_TIM;
*pos++ = 4;
...
tim[1] = n2 - n1 + 4;
skb_put(skb, n2 - n1);
shouldn't the latter be skb_put(skb, n2 - n1 - 2)?
But that'd be the other way around I guess...
johannes
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