Instead of looking up the destination station twice in the TX path
(first to build the header, and then for control processing), save
it when building the header and use it later in the TX path.

To avoid having to look up the station in the many callers, allow
those to pass %NULL which keeps the existing lookup.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

In ieee80211_build_hdr(), the station is looked up to build the
header correctly (QoS field) and to check for authorization. For
mesh, authorization isn't checked here, and QoS capability is
mandatory, so the station lookup can be avoided.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

If there's no station on the 4-addr VLAN interface, then frames
cannot be transmitted. Drop such frames earlier, before setting
up all the information for them.

We should keep the old check though since that code might be used
for other internally-generated frames.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

There's no need to look up the destination station twice while
building the 802.11 header for a given frame if the frame will
actually be transmitted to the station we initially looked up.

This happens for 4-addr VLAN interfaces and TDLS connections, which
both directly send the frame to the station they looked up, though
in the case of TDLS some station conditions need to be checked.

To avoid that, add a variable indicating that we've looked up the
station that the frame is going to be transmitted to, and avoid the
lookup/flag checking if it already has been done.

In the TDLS case, also move the authorized/wme_sta flag assignment
to the correct place, i.e. only when that station is really used.
Before this change, the new lookup should always have succeeded so
that the potentially erroneous data would be overwritten.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This mechanism was historic, and only ever used by IBSS, which
also doesn't need to have it as it properly manages station's
802.1X PAE state (or, with WEP, always has a key.)

Remove the mechanism to clean up the code.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

When a key is installed using a cipher scheme, set a new
internal key flag (KEY_FLAG_CIPHER_SCHEME) on it, to allow
distinguishing such keys more easily.

In particular, use this flag on the TX path instead of
testing the sta->cipher_scheme pointer, as the station is
NULL for broad-/multicast message, and use the key's iv_len
instead of the cipher scheme information.
Signed-off-by: NCedric Izoard <cedric.izoard@ceva-dsp.com>
[add missing documentation, rewrite commit message]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Put station specific code in ieee80211_update_sta_info
function.
Signed-off-by: NJanusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

On very high MCS bitrates, the calculated duration of rates that are
next to each other can be very imprecise, due to the small packet size
used as reference (1200 bytes).
This is most visible in VHT80 nss=2 MCS8/9, for which minstrel shows the
same throughput when the probability is also the same. This leads to a
bad rate selection for such rates.

Fix this issue by introducing an average A-MPDU size factor into the
calculation.
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

It is possible that there are several regulatory requests
pending, but the processing of the last one does not call
CRDA, and thus the other requests are not handled.

Fix this by rescheduling the work until all requests have
been processed.
Signed-off-by: NBen Rosenfeld <ben.rosenfeld@intel.com>
Signed-off-by: NIlan Peer <ilan.peer@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Currently when TDLS station in driver goes from authenticated
to associated state it can not use rate control parameters
because rate control is not initialized yet. Some drivers
require parameters already initialized by rate control when
entering associated state. It can be done by initializing
rate control after station transition to associated state but
before notifying driver about that.
Signed-off-by: NMarek Puzyniak <marek.puzyniak@tieto.com>
Signed-off-by: NArik Nemtsov <arikx.nemtsov@intel.com>
[fix comment to say 'associated' instead of 'authorized']
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The schedule_work()/mutex unlocking code is duplicated many times,
refactor that to a common place in the function.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This will allow mac80211 drivers to call cfg80211 APIs with
the right handle.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Add a comment explaining how the RX path lock is used.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Move the netdev stats accounting into the common function
ieee80211_deliver_skb() that is called in both places.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Timeout was scheduled only in case CRDA was called due to user hints,
but was not scheduled for other cases. This can result in regulatory
hint processing getting stuck in case that there is no CRDA configured.

Change this by scheduling a timeout every time CRDA is called. In
addition, in restore_regulatory_settings() all pending requests are
restored (and not only the user ones).
Signed-off-by: NIlan Peer <ilan.peer@intel.com>
Acked-by: NLuis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Previously, the indoor setting configuration assumed that as
long as a station interface is connected, the indoor environment
setting does not change. However, this assumption is problematic
as:

- It is possible that a station interface is connected to a mobile
  AP, e.g., softAP or a P2P GO, where it is possible that both the
  station and the mobile AP move out of the indoor environment making
  the indoor setting invalid. In such a case, user space has no way to
  invalidate the setting.
- A station interface disconnection does not necessarily imply that
  the device is no longer operating in an indoor environment, e.g.,
  it is possible that the station interface is roaming but is still
  stays indoor.

To handle the above, extend the indoor configuration API to allow
user space to indicate a change of indoor settings, and allow it to
indicate weather it controls the indoor setting, such that:

1. If the user space process explicitly indicates that it is going
   to control the indoor setting, do not clear the indoor setting
   internally, unless the socket is released. The user space process
   should use the NL80211_ATTR_SOCKET_OWNER attribute in the command
   to state that it is going to control the indoor setting.
2. Reset the indoor setting when restoring the regulatory settings in
   case it is not owned by a user space process.

Based on the above, a user space tool that continuously monitors the
indoor settings, i.e., tracking power setting, location etc., can
indicate environment changes to the regulatory core.

It should be noted that currently user space is the only provided mechanism
used to hint to the regulatory core over the indoor/outdoor environment --
while the country IEs do have an environment setting this has been completely
ignored by the regulatory core by design for a while now since country IEs
typically can contain bogus data.
Acked-by: NLuis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: NArikX Nemtsov <arik@wizery.com>
Signed-off-by: NIlan Peer <ilan.peer@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Directly update the indoor setting without wrapping it as
a regulatory request, to simplify the processing.
Acked-by: NLuis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: NIlan Peer <ilan.peer@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

timeout was being passed as int but assigned from u32/u16 values and used
as unsigned type. This is really only for better readability.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This is primarily an API consolidation and should make things more readable
it replaces var * HZ / 1000 by msecs_to_jiffies(var) which also handles
corner cases correctly.

There is a change of behavior as e.g. for HZ 100, t * HZ / 1000 will
return 0 for t < 10 but msecs_to_jiffies will return at least 1 always.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Some device drivers offload part of aggregation including AddBA/DelBA
negotiations to firmware. In such scenario, the PMF configuration of
the station needs to be provided to driver to enable encryption of
AddBA/DelBA action frames.
Signed-off-by: NSenthilKumar Jegadeesan <sjegadee@qti.qualcomm.com>
[fix commit log, documentation]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Sometimes the driver might want to modify private data in interfaces
that are down. One possible use-case is cleaning up interface state
after HW recovery. Some interfaces that were up before the recovery took
place might be down now, but they might still be "dirty".

Introduce a new iterate_interfaces() API and a new ACTIVE iterator flag.
This way the internal implementation of the both active and inactive
APIs remains the same.
Signed-off-by: NArik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

If the device supports waking up on 'any' signal - i.e. it continues
operating as usual and wakes up the host on pretty much anything that
happens, then it makes no sense to also configure the more restricted
WoWLAN mode where the device operates more autonomously but also in a
more restricted fashion.

Currently only cw2100 supports both 'any' and other triggers, but it
seems to be broken as it doesn't configure anything to the device, so
we can't currently get into a situation where both even can correctly
be configured. This is about to change (Intel devices are going to
support both and have different behaviour depending on configuration)
so make sure the conflicting modes cannot be configured.

(It seems that cw2100 advertises 'any' and 'disconnect' as a means of
saying that's what it will always do, but that isn't really the way
this API was meant to be used nor does it actually mean anything as
'any' always implies 'disconnect' already, and the driver doesn't
change device configuration in any way depending on the settings.)
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The ieee80211_tx_prepare_skb() function currently entirely ignores
the fact that the SKB that is passed in might be split into more
than one due to fragmentation and doesn't check the list of skbs
that the TX handlers may create. In case this happens, it would
leak them.

Fix this and also don't leave the skb next/prev pointers dangling
pointing to the on-stack sk_buff_head.
Reported-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

In ieee80211_queue_work() we check if we're quiescing or suspended, so
it's not necessary to check for quiescing before calling this
function.  Remove duplicate checks.
Signed-off-by: NLuciano Coelho <luciano.coelho@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

TDLS off-channel can be allowed in channels marked with GO_CONCURRENT,
provided the device is connected to an AP on the same UNII.
When relaxing the NO-IR requirements for TDLS, we might hit flows in
cfg80211_reg_can_beacon that acquire the wdev lock. Take some measures
to allow this during TDLS setup.
Acquire the RCU read lock later in the flow that invokes
cfg80211_reg_can_beacon.
Avoid taking local->mtx when preparing the setup packet to avoid
circular deadlocks with mac80211 code that is invoked with wdev-mtx
held.
Signed-off-by: NArik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

If the driver rejects WoWLAN, restart the queues before returning
to cfg80211. cfg80211 will return to mac80211, but not before it
disconnects all interfaces. If we don't start the queues, any of
the packets needed for disconnecting won't be transmitted, which
is strange. Fix that.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

We check local->open_count at the top of the __ieee80211_suspend(), so
there's no need to check for it again.  open_count is protected by the
rtnl, so there's no chance for it to have change between the two
calls.
Signed-off-by: NLuciano Coelho <luciano.coelho@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Drivers can't really be expected to suspend properly while auth
or assoc is in progress since then they don't have any state
they could keep with WoWLAN, nor can they actually finish the
authentication or association. In fact, keeping this can cause
subtle issues with drivers like iwlwifi that refuse WoWLAN if
not associated, but have trouble figuring out what's going on
in the middle of association.

In any case, regardless of possible driver issues in this area,
it doesn't make sense for mac80211 to try to WoWLAN-suspend in
the middle of such operations, so stop them before.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

If any interface fails to be added to the driver in during reconfig,
we should remove all the successfully added interfaces and report
reconfig failure, so things can be cleaned up properly.  Failing to do
so can lead to subsequent failures and leave the drivers in a messed
up state.
Signed-off-by: NLuciano Coelho <luciano.coelho@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Since cfg80211 disconnects, but has no insight into the association
process, it can happen that it disconnects while association is in
progress. We then try to abort association in mac80211, but this is
only later so the association can complete between the two.

This results in removing an interface from the driver while bound
to the channel context, obviously causing confusion and issues.

Solve this by also checking if we're associated during quiesce and
if so deauthenticating. The frame will no longer go out to the AP
which is a bit unfortunate, but it'll resolve the crash (and before
we would have suspended without telling the AP as well.)

I'm working on a better, but more complex solution as well, which
should avoid that problem.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Add the AID and VHT-cap/operation IEs during TDLS setup. Remove the
block of TDLS peers when setting HT-caps of the peer station.
Signed-off-by: NArik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Operating classes 128-130 are defined in the 11ac
spec for the 5GHz band.

Update ieee80211_operating_class_to_band() to support them.
Signed-off-by: NEliad Peller <eliadx.peller@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Beacon's timestamp, device system time associated with this beacon and
DTIM count parameters are not updated in the associated vif context
if the latest beacon's content is identical to the previously received.
It make sense to update these changing parameters on every beacon so the
driver can get most updated values. This may be necessary, for example,
to avoid either beacons' drift effect or device time stamp overrun.
IMPORTANT: Three sync_* parameters - sync_ts, sync_device_ts and
sync_dtim_count would possibly be out of sync by the time the driver will
use them. The synchronized view is currently guaranteed only in certain
callbacks.
Signed-off-by: NAlexander Bondar <alexander.bondar@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This modifies cfg80211_vendor_event_alloc() with an additional argument
struct wireless_dev *wdev. __cfg80211_alloc_event_skb() is modified to
take in *wdev argument, if wdev != NULL, both the NL80211_ATTR_IFINDEX
and wdev identifier are added to the vendor event.

These changes make it easier for drivers to add ifindex indication in
vendor events cleanly.

This also updates all existing users of cfg80211_vendor_event_alloc()
and __cfg80211_alloc_event_skb() in the kernel tree.
Signed-off-by: NAhmad Kholaif <akholaif@qca.qualcomm.com>
Signed-off-by: NJouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Add NL80211_EXT_FEATURE_VHT_IBSS flag and VHT
support for IBSS.
Signed-off-by: NJanusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

802.11ad adds new a network type (PBSS) and changes the capability
field interpretation for the DMG (60G) band.
The same 2 bits that were interpreted as "ESS" and "IBSS" before are
re-used as a 2-bit field with 3 valid values (and 1 reserved). Valid
values are: "IBSS", "PBSS" (new) and "AP".

In order to get the BSS struct for the new PBSS networks, change the
cfg80211_get_bss() function to take a new enum ieee80211_bss_type
argument with the valid network types, as "capa_mask" and "capa_val"
no longer work correctly (the search must be band-aware now.)

The remaining bits in "capa_mask" and "capa_val" are used only for
privacy matching so replace those two with a privacy enum as well.
Signed-off-by: NDedy Lansky <dlansky@codeaurora.org>
[rewrite commit log, tiny fixes]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

When using the wext compatibility code in cfg80211, part of the IEs
can be truncated if the passed user buffer is large enough for part
of the BSS but not large enough for all of the IEs.  This can cause
an EAP network to show up as a PSK network.

Always return -E2BIG in this case to avoid truncating data.

Since this changes the control flow, use an on-stack variable for
a small buffer instead of allocating it.
Signed-off-by: NJames Minor <james.minor@ni.com>
[rework patch to error out immediately, use _check wrappers]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Revert commit ad38bfc9 ("mac80211: Tx frame latency statistics")
(along with some follow-up fixes).

This code turned out not to be as useful in the current form as we
thought, and we've internally hacked it up more, but that's not
very suitable for upstream (for now), and we might just do that
with tracing instead.

Therefore, for now at least, remove this code. We might also need
to use the skb->tstamp field for the TCP performance issue, which
is more important than the debugging.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Both wpa_supplicant and mac80211 have and inactivity timer. By default
wpa_supplicant will be timed out in 5 minutes and mac80211's it is 30
minutes. If wpa_supplicant uses a longer timer than mac80211, it will
get unexpected disconnection by mac80211.

Using 0xffffffff instead as the configured value could solve this w/o
changing the code, but due to integer overflow in the expression used
this doesn't work. The expression is:

(current jiffies) > (frame Rx jiffies + NL80211_MESHCONF_PLINK_TIMEOUT * 250)

On 32bit system, the right side would overflow and be a very small
value if NL80211_MESHCONF_PLINK_TIMEOUT is sufficiently large,
causing unexpectedly early disconnections.

Instead allow disabling the inactivity timer to avoid this situation,
by passing the (previously invalid and useless) value 0.
Signed-off-by: NMasashi Honma <masashi.honma@gmail.com>
[reword/rewrap commit log]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

When a fully converted cfg80211 driver needs cfg80211-wext for
userspace API purposes, the symbols need not be exported. When
other drivers (orinoco/hermes or ipw2200) are enabled, they do
need the symbols exported as they use them directly.

Make those drivers select a new CFG80211_WEXT_EXPORT Kconfig
symbol (instead of just CFG80211_WEXT) and export the functions
only if requested - this saves about 1/2k due to the size of
EXPORT_SYMBOL() itself.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>