Send a channel switch notification to userspace when a channel switch
is requested or when we react to a remote CSA.
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Add a new NL80211_CH_SWITCH_STARTED_NOTIFY message that can be sent to
the userspace when a channel switch process has started.  This allows
userspace to take action, for instance, by requesting other interfaces
to switch channel as necessary.

This patch introduces a function that allows the drivers to send this
notification.  It should be used when the driver starts processing a
channel switch initiated by a remote device (eg. when a STA receives a
CSA from the AP) and when it successfully starts a userspace-triggered
channel switch (eg. when hostapd triggers a channel swith in the AP).
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

The device_timestamp value was left out of the event trace for
drv_pre_channel_switch by mistake.  Add it.
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

There was a mistake when merging commit 6d027bcc (mac80211: add
pre_channel_switch driver operation) for upstream.  The assignment of
the values in the ch_switch structure came below the call to
drv_pre_channel_switch.  Fix the order.

Fixes: 6d027bcc (mac80211: add pre_channel_switch driver operation)
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Netlink command for nl80211_send_mpath() should be NL80211_CMD_NEW_MPATH.
Signed-off-by: Henning Rogge <henning.rogge@fkie.fraunhofer.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Drivers might want to know also when mac80211 has
completed reconfiguring after resume (e.g. in order
to know when frames can be passed to mac80211).

Rename restart_complete() to a more-generic reconfig_complete(),
and add a new enum to indicate the reconfiguration type.

Update the current users with the new prototype.
Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Deliver up to 128 frames during service period instead of 8 if
unlimited is specified by the client during association.
8 was just an arbitrary value; so is 128 since unlimited can
be any number.

However for large traffic bursts, increasing this value looks
reasonable. Also, it seems that a few certification tests
expect more frames to be delivered during SP.
Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

When the RIC data element (RDE) is included in the IEs coming
from userspace for an association request, its handling is
currently broken as any IEs that are contained within it would
be split off from it and inserted again after all the IEs that
mac80211 generates (e.g. HT, VHT.)

To fix this, treat the RIC element specially, and stop after
it only when we find something that doesn't actually belong to
it. This assumes userspace is actually correctly building it,
directly after the fast BSS transition IE and before all the
others like extended capabilities.

This leaves as a potential problem the case where userspace is
building the following IEs:

[RDE] [vendor resource description] [vendor non-resource IE]

In this case, we'd erroneously consider all three IEs to be
part of the RIC data together, and not split them between the
two vendor IEs. Unfortunately, it isn't easily possible to
distinguish vendor IEs, so this isn't easy to fix. Luckily,
this case is rare as normally wpa_supplicant will include an
extended capabilities IE in the IEs, and that certainly will
break the two vendor IEs apart correctly.
Reviewed-by: Eliad Peller <eliad@wizery.com>
Reviewed-by: Beni Lev <beni.lev@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

This patch adds 802.11p OCB (Outside the Context of a BSS) mode
support.

When communicating in OCB mode a mandatory wildcard BSSID
(48 '1' bits) is used.

The EDCA parameters handling function was changed to support
802.11p specific values.

The insertion of a newly discovered STAs is done in the similar way
as in the IBSS mode -- through the deferred insertion.

The OCB mode uses a periodic 'housekeeping task' for expiration of
disconnected STAs (in the similar manner as in the MESH mode).

New Kconfig option for verbose OCB debugging outputs is added.
Signed-off-by: Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

This patch adds new iface type (NL80211_IFTYPE_OCB) representing
the OCB (Outside the Context of a BSS) mode.
When establishing a connection to the network a cfg80211_join_ocb
function is called (particular nl80211_command is added as well).
A mandatory parameters during the ocb_join operation are 'center
frequency' and 'channel width (5/10 MHz)'.

Changes done in mac80211 are minimal possible required to avoid
many warnings (warning: enumeration value 'NL80211_IFTYPE_OCB'
not handled in switch) during compilation. Full functionality
(where needed) is added in the following patch.
Signed-off-by: Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

The configured tx power is often limited by hardware capabilities,
channel settings, antenna configuration, etc.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
[fix tracing compilation]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Maximum length of AMPDU that an STA can receive in VHT.
length = 2 ^ (13 + max_ampdu_length_exp) - 1.
Signed-off-by: Eran Harary <eran.harary@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Most code avoids having a default case in interface type switch
statements already, to make it easier to find places that need
to be extended. Change the code in the __cfg80211_leave() and
nl80211_key_allowed() functions to not have a default case.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

When deleting old radio via HWSIM_CMD_DEL_RADIO then listeners on the
multicast group "config" are informed.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

When adding new radio via HWSIM_CMD_NEW_RADIO then listeners on the
multicast group "config" are informed.

While at it, refactor the configuration parameters to be able to
pass them directly and have fewer function arguments.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

A few recent additions to the netlink attributes neglected
to add policy entries, fix that now.
Reported-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Use codespell to find spelling errors.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

This newline shouldn't be there, remove it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

This lets hostapd start if you have SGI-20 configured
as one of your HT capabilities.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

The helper function can't ever create negative values, so use
u32 pointers as the function arguments as the caller does.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

radar_detect_width is unused since commit 97dc94f1
("cfg80211: remove channel_switch combination check")
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Add frequency attribute when sending to user-space over
netlink socket.  The frequency is currently ignored when
receiving from user-space.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Using the name HWSIM_CMD_NEW_RADIO and HWSIM_CMD_DEL_RADIO is more
fitting on how other pieces of the wireless system work.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

When CONFIG_MAC80211_RC_MINSTREL_VHT is set, the module param
minstrel_vht_only tells minstrel_ht whether to allow the mix of ht rates
with vht rates.
ATM, minstrel_ht skips ht rates when minstrel_vht_only is true, but it does
that even if vht is not supported, which makes the sta rates fallback to
legacy as no ht rate gets enabled.

Fixes: 9208247d ("mac80211: minstrel_ht: add basic support for VHT rates <= 3SS@80MHz")
Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

All the callers of ieee80211_mgd_probe_ap_send return right
after they call the flush() callback. This means that calling
flush() is uneeded since its meaning is to wait until the
queues of the device are empty.

Devices that know how to report status on Tx will do so using
the regular path (ieee80211_tx_status) and this status will
trigger the continuation of the flow of the probe
(ieee80211_sta_tx_notify).
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

This is useful when creating virtual interfaces.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

This is useful when creating virtual interfaces.
Keeps udev from mucking with things it shouldn't, since
the default MAC is never seen by udev when specified on
the cmd-line during creation.
Signed-off-by: Ben Greear <greearb@candelatech.com>
[check for feature flag in nl80211 to force drivers to set it]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Good for automated testing, where user can create wlan
interfaces with specified names.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

This will be helpful when using the mac80211_hwsim
wiphys and automated testing.  Let user create the
vifs as needed, and named as expected.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Otherwise, it can be very difficult to know which is which
if you are trying to do detailed testing.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Support creating wiphy devices with an optional name.
This will be used by hwsim to have better automated control
over virtual radio creation/deletion.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Kernel will attempt to use the name if it is supplied,
but if name cannot be used for some reason, the default
phyX name will be used instead.
Signed-off-by: Ben Greear <greearb@candelatech.com>
[while at it, use wiphy_name() instead of dev_name(),
 fix format string issue reported by Kees Cook]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

It is not always convenient to have to know the device-id,
so allow deleting by name as well.
Signed-off-by: Ben Greear <greearb@candelatech.com>
[use wiphy_name() instead of dev_name()]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

This gives a view into packet activity at the virtual radio
level.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Allow drivers to iterate all stations currently uploaded to them.
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

During reconfig the station list is traversed in order and station are
added back to the driver. Make sure the stations are added to the driver
in the same order they were added to mac80211.

This has a real side effect - some drivers (iwlwifi) require TDLS
stations to be added only after the AP station for the same network.
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Some drivers need to know which station is the TDLS link initiator.
Expose this value via the mac80211 ieee80211_sta structure.
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

When an IV is generated, only the MAC header is moved back. The network
header location remains the same relative to the skb head, as the new IV
is using headroom space that was reserved in advance.
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Export ieee80211_ie_split function, so it can be reused by
drivers which need to insert additional elements.
Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

When displaying a rate through debugfs minstrel_ht guesses its flags
comparing group indexes.  Since 3ec373c4 ("mac80211: minstrel_ht:
include type (cck/ht) in rates flag"), the rate flags of interest are
present in the mcs_group-s, so use it.
While improving the code, this also fixes a smatch false positive
"error: testing array offset 'i' after use" in minstrel_ht_stats_dump.
This warning only triggers after 9208247d ("mac80211: minstrel_ht:
add basic support for VHT rates <= 3SS@80MHz") with
CONFIG_MAC80211_RC_MINSTREL_VHT unset because then MINSTREL_VHT_GROUP_0
is above MINSTREL_GROUPS_NB and smatch only barks when the "testing
array offset" seems to prevent possible out of bonds accesses (which
does not happen here since i < ARRAY_SIZE(mi->groups)).
Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com>
Cc: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>