Emmanuel Grumbach 3afc2167f6 cfg80211/mac80211: ignore signal if the frame was heard on wrong channel ... On 2.4Ghz band, the channels overlap since the delta between different channels is 5Mhz while the width of the receiver is 20Mhz (at least). This means that we can hear beacons or probe responses from adjacent channels. These frames will have a significant lower RSSI which will feed all kinds of logic with inaccurate data. An obvious example is the roaming algorithm that will think our AP is getting weak and will try to move to another AP. In order to avoid this, update the signal only if the frame has been heard on the same channel as the one advertised by the AP in its DS / HT IEs. We refrain from updating the values only if the AP is already in the BSS list so that we will still have a valid (but inaccurate) value if the AP was heard on an adjacent channel only. To achieve this, stop taking the channel from DS / HT IEs in mac80211. The DS / HT IEs is taken into account to discard the frame if it was received on a disabled channel. This can happen due to the same phenomenon: the frame is sent on channel 12, but heard on channel 11 while channel 12 can be disabled on certain devices. Since this check is done in cfg80211, stop even checking this in mac80211. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> [remove unused rx_freq variable] Signed-off-by: Johannes Berg <johannes.berg@intel.com>		2014-03-19 21:29:56 +01:00
..
aes_ccm.c	mac80211: port CCMP to cryptoapi's CCM driver	2013-10-11 15:38:20 +02:00
aes_ccm.h	mac80211: port CCMP to cryptoapi's CCM driver	2013-10-11 15:38:20 +02:00
aes_cmac.c	mac80211: fix checkpatch errors	2013-12-18 10:33:06 +01:00
aes_cmac.h	mac80211: fix checkpatch errors	2013-12-18 10:33:06 +01:00
agg-rx.c	mac80211: improve aggregation debug messages	2013-01-18 21:55:15 +01:00
agg-tx.c	mac80211: send {ADD,DEL}BA on AC_VO like other mgmt frames, as per spec	2014-02-04 21:48:28 +01:00
cfg.c	mac80211: refactor channel switch function	2014-03-03 15:07:29 +01:00
cfg.h	mac80211: make cfg80211 ops and privid const	2014-02-04 21:48:21 +01:00
chan.c	mac80211: fix sdata->radar_required locking	2014-02-04 21:58:10 +01:00
debug.h	mac80211: process the CSA frame for mesh accordingly	2013-10-28 15:05:28 +01:00
debugfs_key.c	mac80211: move sdata debugfs dir to vif	2013-03-18 20:10:04 +01:00
debugfs_key.h	mac80211: support separate default keys	2010-12-13 15:23:29 -05:00
debugfs_netdev.c	mac80211: add beacon_loss debugfs file	2014-02-11 12:58:45 +01:00
debugfs_netdev.h
debugfs_sta.c	mac80211: fix agg_status debugfs file write	2014-02-04 21:48:19 +01:00
debugfs_sta.h
debugfs.c	mac80211: Tx frame latency statistics	2013-12-02 11:51:50 +01:00
debugfs.h	mac80211: use __printf attribute in debugfs	2012-10-18 09:01:57 +02:00
driver-ops.h	mac80211: allow driver to return error from sched_scan_stop	2014-02-20 16:09:54 +01:00
event.c
ht.c	mac80211: allow drivers to request SMPS off	2014-02-21 09:28:52 +01:00
ibss.c	cfg80211/mac80211: ignore signal if the frame was heard on wrong channel	2014-03-19 21:29:56 +01:00
ieee80211_i.h	mac80211: fix suspend vs. authentication race	2014-03-19 21:29:53 +01:00
iface.c	Merge remote-tracking branch 'wireless-next/master' into mac80211-next	2014-02-20 11:55:12 +01:00
Kconfig	mac80211: process the CSA frame for mesh accordingly	2013-10-28 15:05:28 +01:00
key.c	mac80211: free all AP/VLAN keys at once	2013-12-16 11:29:48 +01:00
key.h	mac80211: free all AP/VLAN keys at once	2013-12-16 11:29:48 +01:00
led.c	mac80211: use oneshot blink API for LED triggers	2013-08-01 10:48:49 +02:00
led.h	mac80211: use oneshot blink API for LED triggers	2013-08-01 10:48:49 +02:00
main.c	mac80211: add NAPI support back	2014-02-12 21:37:27 +01:00
Makefile	mac80211: mesh power save basics	2013-02-04 18:57:47 +01:00
mesh_hwmp.c	mac80211: use put_unaligned_le in mesh when necessary	2013-11-25 20:51:55 +01:00
mesh_pathtbl.c	mac80211: use put_unaligned_le in mesh when necessary	2013-11-25 20:51:55 +01:00
mesh_plink.c	mac80211: enable WME for peer mesh STA	2014-01-06 17:43:06 +01:00
mesh_ps.c	mac80211: use put_unaligned_le16 in mesh_plink_frame_tx	2013-11-25 20:51:53 +01:00
mesh_sync.c	mac80211: update adjusting TBTT bit in beacon	2013-12-16 14:21:22 +01:00
mesh.c	mac80211: add missing CSA locking	2014-02-04 21:58:11 +01:00
mesh.h	mac80211: use put_unaligned_le in mesh when necessary	2013-11-25 20:51:55 +01:00
michael.c
michael.h
mlme.c	cfg80211/mac80211: ignore signal if the frame was heard on wrong channel	2014-03-19 21:29:56 +01:00
offchannel.c	mac80211: Run deferred scan if last roc_list item is not started	2013-09-30 12:36:56 +02:00
pm.c	mac80211: fix suspend vs. authentication race	2014-03-19 21:29:53 +01:00
rate.c	mac80211: remove module handling from rate control ops	2014-02-04 21:48:26 +01:00
rate.h	mac80211: make rate control ops const	2014-02-04 21:48:21 +01:00
rc80211_minstrel_debugfs.c	mac80211: cosmetics for minstrel_debugfs	2013-04-17 17:08:23 +02:00
rc80211_minstrel_ht_debugfs.c	mac80211: minstrel_ht: replace some occurences of MCS_GROUP_RATES	2013-11-25 20:52:07 +01:00
rc80211_minstrel_ht.c	mac80211: minstrel_ht: sample_table can be __read_mostly	2014-02-04 21:48:25 +01:00
rc80211_minstrel_ht.h	mac80211/minstrel_ht: use the new rate control API	2013-04-22 16:16:41 +02:00
rc80211_minstrel.c	mac80211: make rate control ops const	2014-02-04 21:48:21 +01:00
rc80211_minstrel.h	mac80211: make rate control ops const	2014-02-04 21:48:21 +01:00
rc80211_pid_algo.c	mac80211: make rate control ops const	2014-02-04 21:48:21 +01:00
rc80211_pid_debugfs.c	mac80211: fix some snprintf misuses	2013-10-01 12:16:51 +02:00
rc80211_pid.h	Fix common misspellings	2011-03-31 11:26:23 -03:00
rx.c	mac80211: add missing update on rx status VHT flag	2014-03-03 15:07:33 +01:00
scan.c	mac80211: release sched_scan_sdata when stopping sched scan	2014-03-19 21:29:55 +01:00
spectmgmt.c	mac80211: fix the mesh channel switch support	2013-11-25 16:50:13 +01:00
sta_info.c	mac80211: handle MMPDUs at EOSP correctly	2014-01-10 09:50:02 +01:00
sta_info.h	mac80211: move VHT related RX_FLAG to another variable	2014-02-06 09:34:10 +01:00
status.c	mac80211: remove set but unused variables	2014-02-04 21:58:14 +01:00
tkip.c	mac80211: fix checkpatch errors	2013-12-18 10:33:06 +01:00
tkip.h	mac80211: fix TKIP races, make API easier to use	2011-07-08 11:11:19 -04:00
trace.c	mac80211: trace debug messages	2012-06-24 11:33:18 +02:00
trace.h	mac80211: add tracing for ieee80211_sta_set_buffered	2014-01-06 12:09:01 +01:00
tx.c	mac80211: fix WPA with VLAN on AP side with ps-sta again	2014-03-19 21:29:54 +01:00
util.c	mac80211: move VHT related RX_FLAG to another variable	2014-02-06 09:34:10 +01:00
vht.c	mac80211: update opmode when adding new station	2014-02-05 14:03:23 +01:00
wep.c	wireless: move crypto constants to ieee80211.h	2013-05-16 22:39:41 +02:00
wep.h	mac80211: move RX WEP weak IV counting	2012-03-13 14:54:16 -04:00
wme.c	mac80211: Add support for QoS mapping	2013-12-19 16:30:58 +01:00
wme.h	mac80211: save wmm_acm per sdata	2012-06-20 17:35:22 +02:00
wpa.c	mac80211: add length check in ieee80211_is_robust_mgmt_frame()	2014-02-04 21:58:07 +01:00
wpa.h	mac80211: add generic cipher scheme support	2013-11-25 20:50:52 +01:00