Christian Lamparter schrieb: > On Saturday 30 July 2011 22:03:34 Andreas Hartmann wrote: >> Jouni Malinen schrieb: >>> On Fri, Jul 29, 2011 at 07:22:17PM +0200, Helmut Schaa wrote: >>>> Since EAPOL frames are normal data frames they are treated by the >>>> rate control algorithm as such. Thus it can happen that the rate >>>> control algorithm chooses an inappropriate rate (minstrel_ht uses >>>> MCS rates for example) for the 4-way handshake and under low signal >>>> conditions the handshake may time out. >>>> >>>> To fix this issue always treat EAPOL frames the same as management >>>> frames and send them with the lowest available rate. >>> >>> I don't think that this should be applied for the reasons given (and >>> alternative mechanisms proposed) in the discussion. >> >> I tested it with AP (rt2860) (with STA rt3572sta) under load and >> couldn't see any improvement. The first PTK-rekeying didn't work as >> usual. Or should it be applied to STA? > > might be a shot into the dark. But who's assigning a proper frame sequence > to each eapol? Hostapd certainly can't because it doesn't know what's the > current sequence at the moment... and mac80211 won't assign one because > the frame is injected by a monitor interface. So when the receiver gets the > EAPOL it might drops it because the empty sequence might be not in the > BA window anymore. Does this sound reasonable, or did I miss something? Meanwhile I tested with the patch on both sides, AP (rt2800pci / rt2860) and STA (ath9k / ar9582) and compat-wireless-2011-07-28. The result is unchanged the same: the first ptk rekeying (4 way handshake) just didn't work. Another thing: I don't think, that the wireless modules are the reason of the problem. If I'm using the following test setup, I get no problem at all: AP: (rt2800pci / rt2860 - without patch) STA: (rt3572 / rt3572sta - used without wpa_supplicant, but just rt3572sta stack - rt3572sta ships with an own WPA2-PSK-stack) -> Why is it working without any problems, if wpa_supplicant isn't used at all? Andreas -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
