Re: [rt2x00-users] [rt2800pci (AP) - ath9k] 802.11w: broken aggregation handling?
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Andreas Hartmann wrote: > On Mon, May 07 2012 at 07:11:31 +0200 > Andreas Hartmann <andihartmann@xxxxxxxxxxxxxxx> wrote: > >> Hello! >> >> I switched on 802.11w on my AP (rt2860) in hostapd with ieee80211w=1 and >> in wpa_supplicant with ieee80211w=2 (ath9k). key_mgmt is WPA-EAP (TLS) / >> CCMP for both pairwise and group. >> >> On both machines, compat-wireless-2012-04-26 (or >> compat-wireless-3.4-rc3) is running. >> >> Directly after authorization, dhcp is started and therefore the opening >> of the BA session is started by the AP but times out because of no >> answer of the supplicant: > > [...] > >> >> The deauth request from wpa_supplicant -> AP isn't recognized on the AP, >> too. > > Meanwhile, I found the reason (I forgot to take care of hostapd's > logfile - I would have expected an error message from the driver in > messages, too :-)): > > AP (hostapd.log): > ... > 1336372202.462946: WPA: 48:5d:60:3e:a3:18 WPA_PTK entering state INITIALIZE > 1336372202.462965: wpa_driver_nl80211_set_key: ifindex=17 alg=0 addr=0x673d40 key_idx=0 set_tx=1 seq_len=0 key_len=0 > 1336372202.462977: addr=48:5d:60:3e:a3:18 > 1336372202.462999: WPA: 48:5d:60:3e:a3:18 WPA_PTK_GROUP entering state IDLE > 1336372202.463007: WPA: 48:5d:60:3e:a3:18 WPA_PTK entering state AUTHENTICATION > 1336372202.463018: WPA: 48:5d:60:3e:a3:18 WPA_PTK entering state AUTHENTICATION2 > 1336372202.463025: WPA: Re-initialize GMK/Counter on first station > 1336372202.463896: GMK - hexdump(len=32): [REMOVED] > 1336372202.464771: Key Counter - hexdump(len=32): [REMOVED] > 1336372202.465639: GTK - hexdump(len=16): [REMOVED] > 1336372202.466502: IGTK - hexdump(len=16): [REMOVED] > 1336372202.466524: wpa_driver_nl80211_set_key: ifindex=17 alg=3 addr=0x44fbbe key_idx=1 set_tx=1 seq_len=0 key_len=16 > 1336372202.466539: broadcast key > 1336372202.478318: wpa_driver_nl80211_set_key: ifindex=17 alg=4 addr=0x44fbbe key_idx=4 set_tx=1 seq_len=0 key_len=16 > 1336372202.478349: broadcast key > 1336372202.478389: nl80211: set_key failed; err=-22 Invalid argument) > .... > 1336372202.529973: wlan0: STA 48:5d:60:3e:a3:18 IEEE 802.1X: authenticated - EAP type: 13 (TLS) > > > But there are some questions open anyway: > > - Why is the authentication started here at all, regardless of an error? > - Why does TLS succeed? (802.11g is "working"). > - Why does set_key fail? > > > I'm getting the same error, regardless if nohwcrypt is enabled for > rt2800pci or not. The attached patch seems to enable 802.11w for rt2800pci (AP). It does not work for rt2800usb (rt3572 SUPP), even if the set_key error disappears (originally the flag IEEE80211_HW_MFP_CAPABLE was set unconditionally). I can't say, if it works with all rt2800pci devices and I can't say, if it works with rt2800pci device used as supplicant. Tested (incl. PTK rekeying) with ath9k supplicant. Deauthentication does work fine, too. I couldn't test, if using more then one supplicant at the same time, does work, too. Legacy driver (rt5572sta) seems to not support 802.11w at all (with ralink driver). Even if ieee80211w=2 in supplicant.conf is enabled, it uses plain text management frames. Regards, Andreas Hartmann
diff -ur compat-wireless-2012-04-26.orig/drivers/net/wireless/rt2x00/rt2800lib.c compat-wireless-2012-04-26/drivers/net/wireless/rt2x00/rt2800lib.c --- compat-wireless-2012-04-26.orig/drivers/net/wireless/rt2x00/rt2800lib.c 2012-04-26 22:10:30.000000000 +0200 +++ compat-wireless-2012-04-26/drivers/net/wireless/rt2x00/rt2800lib.c 2012-05-07 11:04:17.894354807 +0200 @@ -4528,7 +4528,8 @@ */ if (!rt2x00_is_usb(rt2x00dev)) rt2x00dev->hw->flags |= - IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING; + IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | + IEEE80211_HW_MFP_CAPABLE; SET_IEEE80211_DEV(rt2x00dev->hw, rt2x00dev->dev); SET_IEEE80211_PERM_ADDR(rt2x00dev->hw,