Add support for drivers to report the total number of MPDUs received
and the number of MPDUs received with an FCS error from a specific
peer. These counters will be incremented only when the TA of the
frame matches the MAC address of the peer irrespective of FCS
error.

It should be noted that the TA field in the frame might be corrupted
when there is an FCS error and TA matching logic would fail in such
cases. Hence, FCS error counter might not be fully accurate, but it can
provide help in detecting bad RX links in significant number of cases.
This FCS error counter without full accuracy can be used, e.g., to
trigger a kick-out of a connected client with a bad link in AP mode to
force such a client to roam to another AP.

Signed-off-by: Ankita Bajaj <bankita@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Instead of open-coding a lot of calls to is_valid_ie_attr(),
add this validation directly to the policy, now that we can.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Many range checks can be done in the policy, move them
there. A few in mesh are added in the code (taken out of
the macros) because they don't fit into the s16 range in
the policy validation.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Using skcipher just makes the code longer, and mac80211
also "open-codes" the WEP encrypt/decrypt.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Merge net-next, which pulled in net, so I can merge a few more
patches that would otherwise conflict.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Minor conflict in net/core/rtnetlink.c, David Ahern's bug fix in 'net'
overlapped the renaming of a netlink attribute in net-next.

Signed-off-by: David S. Miller <davem@davemloft.net>

There were supposed to be two blocks - one for each direction
cfg80211 <-> driver, clean up the code to restore that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

There isn't really any need for us to be sending this from
two different places - move cfg80211_init_wdev() later and
send the notification from there, removing it from the non-
netdev case.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

We currently have two places that do similar things, depending
on whether it's a wdev with or without netdev.

Combine the code to avoid having to duplicate all new additions.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>