nl80211: Add prints for kernel events

Add prints for kernel event, including the event ID and event string.

Signed-hostap: David Spinadel <david.spinadel@intel.com>
Signed-hostap: Ilan Peer <ilan.peer@intel.com>
Remove 802.11b rates only in case of P2P group operation

11b rates removal have had impact on SoftAP functionality in
wpa_supplicant. This patch verifies that only in case of P2P group
operation 11b rates will be eliminated. Refer also to commit
4c2c30289305b67c09f464ba29352b008b5ec433.

Signed-hostap: Alexander Bondar <alexander.bondar@intel.com>
Signed-hostap: Ilan Peer <ilan.peer@intel.com>
Add bandwidth and center freq info to signal_poll

Signed-hostap: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-hostap: Ilan Peer <ilan.peer@intel.com>
Add AVG_RSSI report in signal_poll

Add AVG_RSSI report to the signal_poll command if it is reported by
the kernel.

Signed-hostap: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-hostap: Ilan Peer <ilan.peer@intel.com>
D-Bus: Emit signal when a station is authorized or deauthorized

Add "StaAuthorized" and "StaDeauthorized" D-Bus interface in AP mode.
After enabling the AP mode of wpa_supplicant, the other process need to
get the MAC address and authorization status of every station, so
wpa_supplicant emits signal when the station is authorized or
deauthorized.

Signed-hostap: Chengyi Zhao <chengyix.zhao@gmail.com>
wlantest: Always write radiotap pcap-ng

When writing pcap-ng files, always include a radiotap
header even if there wasn't one in the input. For now
just drop prism headers, I don't have any to test.

Signed-hostap: Johannes Berg <johannes.berg@intel.com>
bridge: Give bridge name in per-bss configuration

Currently, when different BSS using different tagged vlan
interfaces, they are forced to share the bridge brvlan#,
which is not desirable.

This patch fixes this by making the bridge name configurable.

Signed-hostap: Michael Braun <michael-dev@fami-braun.de>
bridge: Use safe default bridge interface

Currently by default, all BSS share the bridge brvlan%d.
While this is sane when no tagged-interface is given, this
is insane when different tagged interfaces are given, as
it would result in bridging those tagged interfaces.

This patch therefore uses br%s%d with %s=tagged_interface
and %d=VLAN ID as bridge name when a tagged-interface is given.

Signed-hostap: Michael Braun <michael-dev@fami-braun.de>
bridge: Track inter-BSS usage

Currently, struct hostapd_vlan is a per-BSS data structure which
also contains informations about whether to remove the bridge
or clear wlan / tagged-vlan interface from the bridge.

In a multi-interface multi-BSS setup, this can lead to the following
race condition:
 1. wlan0 creates VLAN A, sets DVLAN_CLEAN_BR and DVLAN_CLEAN_VLAN_PORT
 2. wlan1 creates VLAN A, does not set DVLAN_CLEAN_BR and
    DVLAN_CLEAN_VLAN_PORT as already there
 3. wlan0 removes VLAN A, removes tagged-interface from the bridge
    but not the bridge.
    Now wlan1 VLAN A is unusable due to the missing uplink.
 4. wlan1 removes VLAN A, does not cleanup

Solution:
This requires an inter-BSS inter-interface data structure to track the
bridge / bridge port usage within hostapd. This data structure could
also be used to track any other device-has-been-created-by-hostapd
information or when regarding interface freeing.

Signed-hostap: Michael Braun <michael-dev@fami-braun.de>
VLAN: Avoid access to non-existing interfaces

Currently, hostapd_get_vlan_id_ifname() is used to determine if a given
vlan is valid *and* to actually determine the interface. This leads to
wpa_set_keys() sometimes setting the key on the wildcard interface name,
which does not make sense.

This patch therefore adds hostapd_vlan_id_valid() and makes
hostapd_get_vlan_id_ifname() not return a wildcard interface.

Signed-hostap: Michael Braun <michael-dev@fami-braun.de>
nl80211: Print interface name on set_key()

Sometimes an interface name that cannot be resolved is given to the
set_key function, so print the ifname in addition to the ifidx.

Signed-hostap: Michael Braun <michael-dev@fami-braun.de>
nl80211: Rename is_p2p_interface

Rename is_p2p_interface() to is_p2p_net_interface() since it used to
identify network P2P interfaces to disable 802.11b rates on them.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
nl80211: Identify if nl80211 is capable of P2P Device abstraction

Check the supported interfaces attribute to identify support for
a dedicated P2P Device interface type. If set, update the driver
capabilities flag to notify the supplicant.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
nl80211: Hold wdev identification for P2P Device

Add wdev_id to i802_bss. wdev_id_set indicates whether this id is
available. Use wdev_id if assigned, instead of ifindex. Use wdev_id for
events that come from the kernel to identify the relevant interface.
This commit does not assign wdev_id value for the BSS yet, i.e., this is
only preparation for the value to be used in a future commit.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
nl80211: Add a handler to create_interface

Add an option to pass a handler to nl80211_create_iface() and
nl80211_create_interface_once() that will be called after receiving the
message from the kernel. This handler will add the option to process the
message in different ways for different interfaces.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
nl80211: Add support for P2P Device in add interface

Don't try to assign ifindex for P2P Device interface.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
nl80211: Allow Android P2P functionality

To support Android the kernel may have a "p2p0" netdev for a P2P Device
even though this isn't very useful, but Android requires a netdev. To
support this in the supplicant, if the interface mode is P2P_DEVICE,
re-set it to the same instead of STATION mode.

Note that this is only possible with a kernel that creates a
netdev for the P2P Device wdev.

Signed-hostap: Johannes Berg <johannes.berg@intel.com>
nl80211: Handle creation of P2P Device interface

Add specific handler for creating the P2P Device to store the wdev_id as
this type of interface does not have an interface index.

Signed-hostap: Arend van Spriel <arend@broadcom.com>
nl80211: Fix P2P Device interface initialization

Couple of issues upon initializing a P2P Device interface needed
to be solved.

Signed-hostap: Arend van Spriel <arend@broadcom.com>
nl80211: Remove P2P Device interface upon .deinit()

The .deinit() closes netlink for P2P Device. Before doing that remove
the P2P Device interface that was created by wpa_supplicant.

Signed-hostap: Arend van Spriel <arend@broadcom.com>