linux-toradex.git/net/mac80211/spectmgmt.c, branch v4.9.118

mac80211: Do not disconnect on invalid operating class

2018-05-30T05:50:28+00:00

[ Upstream commit 191da271ac260700db3e5b4bb982a17ca78769d6 ]

Some APs include a non global operating class in their extended channel
switch information element. In such a case, as the operating class is not
known, mac80211 would decide to disconnect.

However the specification states that the operating class needs to be
taken from Annex E, but it does not specify from which table it should be
taken, so it is valid for an AP to use a non global operating class.

To avoid possibly unneeded disconnection, in such a case ignore the
operating class and assume that the current band is used, and if the
resulting channel and band configuration is invalid disconnect.

Signed-off-by: Ilan Peer 
Signed-off-by: Luca Coelho 
Signed-off-by: Johannes Berg 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

mac80211: parse wide bandwidth channel switch IE with workaround

2016-07-06T12:55:04+00:00

Continuing the workaround implemented in commit 23665aaf9170
("mac80211: Interoperability workaround for 80+80 and 160 MHz channels")
use the same code to parse the Wide Bandwidth Channel Switch element
by converting to VHT Operation element since the spec also just refers
to that for parsing semantics, particularly with the workaround.

While at it, remove some dead code - the IEEE80211_STA_DISABLE_40MHZ
flag can never be set at this point since it's checked earlier and the
wide_bw_chansw_ie pointer is set to NULL if it's set.

Signed-off-by: Johannes Berg

cfg80211: remove enum ieee80211_band

2016-04-12T13:56:15+00:00

This enum is already perfectly aliased to enum nl80211_band, and
the only reason for it is that we get IEEE80211_NUM_BANDS out of
it. There's no really good reason to not declare the number of
bands in nl80211 though, so do that and remove the cfg80211 one.

Signed-off-by: Johannes Berg

mac80211: remove unused variable in ieee80211_parse_ch_switch_ie()

2014-12-17T14:45:17+00:00

The ht_oper variable is assigned a value, but never used in
ieee80211_parse_ch_switch_ie().  Remove it.

Signed-off-by: Luciano Coelho 
Signed-off-by: Emmanuel Grumbach 
Signed-off-by: Johannes Berg

mac80211: use secondary channel offset IE also beacons during CSA

2014-10-29T15:37:45+00:00

If we are switching from an HT40+ to an HT40- channel (or vice-versa),
we need the secondary channel offset IE to specify what is the
post-CSA offset to be used.  This applies both to beacons and to probe
responses.

In ieee80211_parse_ch_switch_ie() we were ignoring this IE from
beacons and using the *current* HT information IE instead.  This was
causing us to use the same offset as before the switch.

Fix that by using the secondary channel offset IE also for beacons and
don't ever use the pre-switch offset.  Additionally, remove the
"beacon" argument from ieee80211_parse_ch_switch_ie(), since it's not
needed anymore.

Cc: stable@vger.kernel.org
Reported-by: Jouni Malinen 
Signed-off-by: Luciano Coelho 
Signed-off-by: Johannes Berg

mac80211: fix the mesh channel switch support

2013-11-25T15:50:13+00:00

Mesh STA receiving the mesh CSA action frame is not able to trigger
the mesh channel switch due to the incorrect handling and comparison
of mesh channel switch parameters element (MCSP)'s TTL. Make sure
the MCSP's TTL is updated accordingly before calling the
ieee80211_mesh_process_chnswitch. Also, we update the beacon before
forwarding the CSA action frame, so MCSP's precedence value and
initiator flag need to be updated prior to this.

Signed-off-by: Chun-Yeow Yeoh 
Signed-off-by: Johannes Berg

mac80211: process mesh channel switching using beacon

2013-10-28T14:05:30+00:00

Trigger the mesh channel switching procedure if the mesh STA
happens to miss the CSA action frame but able to receive the
beacon containing the CSA and MCSP elements from its peer
mesh STAs.

Signed-off-by: Chun-Yeow Yeoh 
[fix locking in ieee80211_mesh_process_chnswitch()]
Signed-off-by: Johannes Berg

mac80211: refactor the parsing of chan switch ie

2013-10-28T14:05:28+00:00

Refactor the channel switch IE parsing to reduce the number
of function parameters.

Signed-off-by: Chun-Yeow Yeoh 
Signed-off-by: Johannes Berg

mac80211: split off channel switch parsing function

2013-09-26T11:27:13+00:00

The channel switch parsing function can be re-used for the IBSS code,
put the common part into an extra function.

Signed-off-by: Simon Wunderlich 
Signed-off-by: Mathias Kretschmer 
[also move/rename chandef_downgrade]
Signed-off-by: Johannes Berg

mac80211: Remove unnecessary OOM logging messages

2011-09-13T19:45:02+00:00

Removing unnecessary messages saves code and text.

Site specific OOM messages are duplications of a generic MM
out of memory message and aren't really useful, so just
delete them.

Signed-off-by: Joe Perches 
Signed-off-by: John W. Linville