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Daniel Yingqiang Ma 03ceedea97 ath9k: Group Key fix for VAPs 
When I set up multiple VAPs with ath9k, I encountered an issue that
the traffic may be lost after a while.

The detailed phenomenon is
1. After a while the clients connected to one of these VAPs will get
into a state that no broadcast/multicast packets can be transfered
successfully while the unicast packets can be transfered normally.
2. Minutes latter the unitcast packets transfer will fail as well,
because the ARP entry is expired and it can't be freshed due to the
broadcast trouble.

It's caused by the group key overwritten and someone discussed this
issue in ath9k-devel maillist before, but haven't work out a fix yet.

I referred the method in madwifi, and made a patch for ath9k.
The method is to set the high bit of the sender(AP)'s address, and
associated that mac and the group key. It requires the hardware
supports multicast frame key search. It seems true for AR9160.

Not sure whether it's the correct way to fix this issue. But it seems
to work in my test. The patch is attached, feel free to revise it.

Signed-off-by: Daniel Yingqiang ma <yma.cool@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
 		2010-04-20 11:50:51 -04:00
..
Kconfig mac80211: enhance tracing 2010-04-08 15:24:13 -04:00
Makefile mac80211: Generalize off-channel operation helpers from scan code 2009-12-28 16:55:01 -05:00
aes_ccm.c mac80211: aes_ccm.c remove crypto wrapper and extra args 2008-07-08 14:16:02 -04:00
aes_ccm.h mac80211: pass scratch buffer directly, remove additional pointers 2008-07-08 14:16:02 -04:00
aes_cmac.c mac80211: 802.11w - Add BIP (AES-128-CMAC) 2009-01-29 16:00:02 -05:00
aes_cmac.h mac80211: 802.11w - Add BIP (AES-128-CMAC) 2009-01-29 16:00:02 -05:00
agg-rx.c mac80211: fix stopping RX BA session from timer 2010-04-19 16:41:42 -04:00
agg-tx.c mac80211: add missing newline 2010-04-19 16:45:20 -04:00
cfg.c mac80211: Track Beacon signal strength and implement cqm events 2010-03-31 14:46:42 -04:00
cfg.h [MAC80211]: rename ieee80211_cfg.h to cfg.h 2007-10-10 16:52:34 -07:00
debugfs.c mac80211: Added a new debugfs file for reading channel_type 2010-02-08 16:50:57 -05:00
debugfs.h cfg80211/mac80211: use debugfs_remove_recursive 2009-10-30 16:49:18 -04:00
debugfs_key.c mac80211: reduce reliance on netdev 2009-12-21 18:38:52 -05:00
debugfs_key.h mac80211: 802.11w - Use BIP (AES-128-CMAC) 2009-01-29 16:00:03 -05:00
debugfs_netdev.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 into merge 2010-04-08 13:34:54 -04:00
debugfs_netdev.h mac80211: reduce reliance on netdev 2009-12-21 18:38:52 -05:00
debugfs_sta.c mac80211: fix typo for LDPC capability 2010-04-09 13:43:09 -04:00
debugfs_sta.h mac80211: RCU-ify STA info structure access 2008-03-06 15:30:46 -05:00
driver-ops.h mac80211: remove get_tx_stats() driver op 2010-02-08 16:51:01 -05:00
driver-trace.c mac80211: fix sparse warnings/errors 2009-08-04 16:43:25 -04:00
driver-trace.h mac80211: enhance tracing 2010-04-08 15:24:13 -04:00
event.c cfg80211: use proper allocation flags 2009-07-10 15:01:49 -04:00
ht.c mac80211: remove ieee80211_sta_stop_rx_ba_session 2010-04-07 14:38:03 -04:00
ibss.c mac80211: (really) fix rates setup on IBSS merge 2010-03-16 15:05:47 -04:00
ieee80211_i.h mac80211: remove ieee80211_sta_stop_rx_ba_session 2010-04-07 14:38:03 -04:00
iface.c mac80211: Add support for connection monitor in hardware 2010-03-23 16:51:42 -04:00
key.c ath9k: Group Key fix for VAPs 2010-04-20 11:50:51 -04:00
key.h mac80211 : fix a race with update_tkip_key 2009-12-22 13:31:14 -05:00
led.c mac80211: rename files 2008-04-08 16:44:45 -04:00
led.h mac80211: rename files 2008-04-08 16:44:45 -04:00
main.c mac80211: enhance tracing 2010-04-08 15:24:13 -04:00
mesh.c mac80211: Moved mesh action codes to a more visible location 2010-04-08 15:24:07 -04:00
mesh.h mac80211: Moved mesh action codes to a more visible location 2010-04-08 15:24:07 -04:00
mesh_hwmp.c mac80211: Moved mesh action codes to a more visible location 2010-04-08 15:24:07 -04:00
mesh_pathtbl.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 2009-12-25 16:34:56 -08:00
mesh_plink.c mac80211: Moved mesh action codes to a more visible location 2010-04-08 15:24:07 -04:00
michael.c mac80211: remove ieee80211_get_hdr_info 2008-07-08 14:16:01 -04:00
michael.h mac80211: remove ieee80211_get_hdr_info 2008-07-08 14:16:01 -04:00
mlme.c mac80211: enhance tracing 2010-04-08 15:24:13 -04:00
offchannel.c mac80211: Fixed netif_tx_wake_all_queues in IBSS mode 2010-01-15 16:58:28 -05:00
pm.c mac80211: rename WLAN_STA_SUSPEND to WLAN_STA_BLOCK_BA 2010-04-07 14:38:04 -04:00
rate.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 2010-02-26 16:54:45 -05:00
rate.h mac80211: Fix HT rate control configuration 2010-03-03 15:39:21 -05:00
rc80211_minstrel.c minstrel: make the rate control ops reusable from another rc implementation 2010-03-10 17:44:23 -05:00
rc80211_minstrel.h minstrel: make the rate control ops reusable from another rc implementation 2010-03-10 17:44:23 -05:00
rc80211_minstrel_debugfs.c minstrel: make the rate control ops reusable from another rc implementation 2010-03-10 17:44:23 -05:00
rc80211_pid.h mac80211/drivers: rewrite the rate control API 2008-10-31 19:00:23 -04:00
rc80211_pid_algo.c mac80211: pid: replace open-coded msecs_to_jiffies 2010-01-19 16:25:15 -05:00
rc80211_pid_debugfs.c headers: remove sched.h from interrupt.h 2009-10-11 11:20:58 -07:00
rx.c mac80211: delay skb linearising in rx decryption 2010-04-09 13:43:09 -04:00
scan.c mac80211: enhance tracing 2010-04-08 15:24:13 -04:00
spectmgmt.c mac80211: reduce reliance on netdev 2009-12-21 18:38:52 -05:00
sta_info.c mac80211: Prevent running sta_cleanup timer unnecessarily 2010-04-19 16:41:42 -04:00
sta_info.h mac80211: clean up/fix aggregation code 2010-04-07 14:38:05 -04:00
status.c mac80211: optimize tx status processing 2010-03-15 15:31:59 -04:00
tkip.c mac80211: pass vif and station to update_tkip_key 2010-01-22 16:08:55 -05:00
tkip.h mac80211: tkip.c consolidate tkip IV writing in helper 2008-06-14 12:18:13 -04:00
tx.c mac80211: Prevent running sta_cleanup timer unnecessarily 2010-04-19 16:41:42 -04:00
util.c mac80211: enhance tracing 2010-04-08 15:24:13 -04:00
wep.c mac80211: avoid NULL ptr deref when using WEP 2010-01-22 12:39:14 -05:00
wep.h cfg80211: rework key operation 2009-07-24 15:05:09 -04:00
wme.c mac80211: fix-up build breakage in 2.6.33 2010-01-06 15:35:49 -05:00
wme.h mac80211: fix skb buffering issue 2010-01-05 16:21:40 -05:00
work.c mac80211: check whether scan is in progress before queueing scan_work 2010-04-09 13:43:11 -04:00
wpa.c mac80211: move control.hw_key assignment 2010-01-19 16:25:19 -05:00
wpa.h mac80211: 802.11w - Add BIP (AES-128-CMAC) 2009-01-29 16:00:02 -05:00