Ubuntu Manpage: net80211 — standard interface to IEEE 802.11 devices

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NAME

     net80211 — standard interface to IEEE 802.11 devices

SYNOPSIS

     #include <sys/types.h>
     #include <sys/socket.h>
     #include <net/if.h>
     #include <net/ethernet.h>
     #include <net80211/ieee80211_ioctl.h>

DESCRIPTION

This section describes the standard programming interface to configure and retrieve status information for
IEEE 802.11 devices that depend on the wlan(4) module for operation. The interface is via one of the
following ioctl(2) calls on a socket:

SIOCG80211 Get configuration or status information.

SIOCS80211 Set configuration information.

These requests are made via a modified ifreq structure. This structure is defined as follows:

struct ieee80211req {
char i_name[IFNAMSIZ]; /* if_name, e.g. "wi0" */
uint16_t i_type; /* req type */
int16_t i_val; /* Index or simple value */
int16_t i_len; /* Index or simple value */
void *i_data; /* Extra data */
};

Requests that are not supported by the underlying device return -1 and set the global variable errno to
EOPNOTSUPP. SIOCG80211 requests that return data to an application place small values in i_val or in a
user-specified buffer pointed to by i_data. When an indirect buffer is used i_len specifies how large the
indirect buffer is and on return it is set by the system to the actual amount of data returned. SIOCS80211
requests use a similar scheme with data passed to the system taken either from i_val or an indirect buffer
pointed to by i_data.

For SIOCG80211 the following values of i_type are valid:

IEEE80211_IOC_AMPDU
Return whether or not AMPDU is enabled in i_val. AMPDU is an aggregation scheme that is part of
the 802.11n specification and is used only when operating on an HT channel. The value returned is
one of: 0 (AMPDU disabled), 1 (AMPDU enabled for transmit), 2 (AMPDU enabled for receive), and 3
(AMPDU enabled for transmit and receive). The 802.11n specification says a compliant station must
receive AMPDU but may not support transmitting AMPDU frames. Disabling AMPDU receive is mainly
useful for testing and working around bugs.

IEEE80211_IOC_AMPDU_DENSITY
Return the minimum density for bursting AMPDU frames in i_val. The value returned is one of: 0 (no
time restriction), 1 (1/4 usec), 2 (1/2 usec), 3 (1 usec), 4 (2 usec), 5 (4 usec), 6 (8 usec), and
7 (16 usec).

IEEE80211_IOC_AMPDU_LIMIT
Return the limit on the size of AMPDU frames in i_val. The value returned is one of: 0 (8
kilobytes), 1 (16 kilobytes), 2 (32 kilobytes), and 3 (64 kilobytes).

IEEE80211_IOC_AMSDU
Return whether or not AMSDU is enabled in i_val. AMSDU is an aggregation scheme that is part of
the 802.11n specification and is used only when operating on an HT channel. The value returned is
one of: 0 (AMSDU disabled), 1 (AMSDU enabled for transmit), 2 (AMSDU enabled for receive), and 3
(AMSDU enabled for transmit and receive). The 802.11n specification says a compliant station must
receive AMSDU but may not support transmitting AMSDU frames. Disabling AMSDU receive is mainly
useful for testing and working around bugs.

IEEE80211_IOC_AMSDU_LIMIT
Return the limit on the size of AMSDU frames in i_val. The value returned is one of: 3839 (bytes)
and 7935 (bytes). Note these values are specified by 802.11n; arbitrary values are not allowed.

IEEE80211_IOC_APBRIDGE
Return whether AP bridging is enabled in i_val. Normally packets sent between stations associated
to the same access point are delivered without going through system layers that do packet
filtering; when AP bridging is disabled packets are passed up the system to be forwarded using some
other mechanism. This value will be non-zero when AP bridging is enabled and otherwise zero.

IEEE80211_IOC_APPIE
Return an application information element via i_data. Application IE's are maintained for many
802.11 frames; the request must identify the frame to return an IE for in i_val. For example, to
retrieve the IE sent in each Beacon frame i_val would be set to IEEE80211_FC0_SUBTYPE_BEACON |
IEEE80211_FC0_TYPE_MGT. If no information element is installed then EINVAL is returned. If the
data buffer for returning data is too small to hold the information element the value is truncated;
this permits querying the presence of data by requesting zero bytes of data be returned.

IEEE80211_IOC_AUTHMODE
Return the current authentication mode in i_val. Valid values are IEEE80211_AUTH_NONE (no
authentication), IEEE80211_AUTH_OPEN (open authentication), IEEE80211_AUTH_SHARED (shared key
authentication), IEEE80211_AUTH_8021X (802.1x only authentication), and IEEE80211_AUTH_WPA
(WPA/802.11i/802.1x authentication).

IEEE80211_IOC_BEACON_INTERVAL
Return the time between Beacon frames (in TU) in i_val.

IEEE80211_IOC_BGSCAN
Return whether background scanning is enabled in i_val. When this value is non-zero and operating
in station mode the station will periodically leave the current channel and scan for neighboring
stations. See also IEEE80211_IOC_BGSCAN_IDLE and IEEE80211_IOC_BGSCAN_INTERVAL.

IEEE80211_IOC_BGSCAN_IDLE
Return in i_val the minimum time (msecs) a station must be idle (i.e. not transmitting or receiving
frames) before it will do a background scan. See also IEEE80211_IOC_BGSCAN_INTERVAL.

IEEE80211_IOC_BGSCAN_INTERVAL
Return in i_val the minimum time (seconds) between background scan operations. See also
IEEE80211_IOC_BGSCAN_IDLE.

IEEE80211_IOC_BMISSTHRESHOLD
Return in i_val the number of consecutive missed Beacon frames before the system will attempt to
roam to a different/better access point.

IEEE80211_IOC_BSSID
Return the MAC address for the current BSS identifier via i_data. When the interface is running,
the bssid is either the value configured locally (e.g. for an IBSS network started by the local
station) or the value adopted when joining an existing network. For WDS interfaces this value is
the address of the remote station. When the interface is not running, the bssid returned is the
desired bssid, if any, that has been configured.

IEEE80211_IOC_BURST
Return whether or not packet bursting is enabled in i_val. If this value is non-zero then the
system will try to send packets closely spaced to improve throughput.

IEEE80211_IOC_CHANINFO
Return the set of available channels via i_data. Note this data should be used by user
applications to map between channel specifications (frequency and attributes) and IEEE channel
numbers as user applications may not have the necessary information to do this directly (e.g. for
900MHz radios, operation in the Public Safety Band).

IEEE80211_IOC_CHANLIST
Return the current list of usable channels via i_data. The channel list is returned as a bit
vector with bit N set to 1 if IEEE channel number N is available for use.

IEEE80211_IOC_CHANNEL
Return the IEEE channel number of the current channel in i_val. Note this request is deprecated;
use IEEE80211_IOC_CURCHAN instead.

IEEE80211_IOC_COUNTERMEASURES
Return whether TKIP Countermeasures are enabled in i_val. This value will be non-zero when
Countermeasures are enabled and otherwise zero.

IEEE80211_IOC_CURCHAN
Return information for the current channel via i_data. This information includes the IEEE channel
number, the frequency, and attributes that describe the operating constraints (e.g. Passive Scan,
DFS, usage restrictions).

IEEE80211_IOC_DEVCAPS
Return device capabilities in the data buffer pointed at by i_data. The buffer must be large
enough to return the number of available channels but otherwise may be made small to limit how much
information is returned.

IEEE80211_IOC_DFS
Return whether or not Dynamic Frequency Selection (DFS) is enabled in i_val. DFS embodies several
facilities including detection of overlapping radar signals, dynamic transmit power control, and
channel selection according to a least-congested criteria. DFS support is mandatory for some 5GHz
frequencies in certain locales (e.g. ETSI). By default DFS is enabled according to the regulatory
definitions and the current country code, regdomain, and channel.

IEEE80211_IOC_DOTD
Return whether or not 802.11d support is enabled in i_val. When 802.11d is enabled in station
mode, Beacon frames that advertise a country code different than the currently configured country
code will cause an event to be dispatched to user applications. This event can be used by the
station to adopt that country code and operate according to the associated regulatory constraints.
When operating as an access point with 802.11d enabled the Beacon and ProbeResponse frames
transmitted will advertise the current regulatory domain settings.

IEEE80211_IOC_DOTH
Return whether 802.11h support is enabled in i_val. When 802.11h is enabled Beacon and
ProbeResponse frames will have the SpectrumMgt bit set in the capabilities field and country and
power constraint information elements will be present. 802.11h support also includes handling
Channel Switch Announcements (CSA) which are a mechanism to coordinate channel changes by an access
point. By default 802.11h is enabled if the device is capable.

IEEE80211_IOC_DROPUNENCRYPTED
Return, in i_val, whether unencrypted packets transmit/received should be discarded. This value
will be zero if unencrypted packets will be accepted and non-zero if they are to be discarded.

IEEE80211_IOC_DTIM_PERIOD
Return the period (in beacon intervals) between DTIM events in i_val.

IEEE80211_IOC_DWDS
Return, in i_val, whether or not Dynamic WDS support is enabled. Dynamic WDS is a facility by
which packets may be tunneled over normal Infrastructure BSS associations using 4-address (WDS)
frames.

IEEE80211_IOC_FF
Return, in i_val, whether Atheros fast-frames support is enabled. Fast-frames is a non-standard
protocol extension that aggregates multiple frames to improve throughput. Note that enabling fast-
frames support does not guarantee use; the client and access point must negotiate its use.

IEEE80211_IOC_FRAGTHRESHOLD
Return, in i_val, the threshold (in bytes) for enabling fragmentation frames. Packets larger than
this value will automatically be split into multiple fragmented frames that are sent one after the
other.

IEEE80211_IOC_GREENFIELD
Return, in i_val, whether or not Greenfield preamble use is enabled. This setting is meaningful
only when operating with 802.11n on an HT channel.

IEEE80211_IOC_HIDESSID
Return, in i_val, whether SSID hiding/cloaking is enabled. SSID hiding is only meaningful when
operating as an access point. When this is enabled Beacon frames do not include the SSID and
ProbeRequest frames are not answered unless they include the AP's SSID. This value will be non-
zero when SSID hiding is enabled and otherwise zero.

IEEE80211_IOC_HTCOMPAT
Return, in i_val, whether or not 802.11n compatibility support is enabled. The 802.11n protocol
specification went through several incompatible iterations. Some vendors implemented 11n support
to older specifications that will not interoperate with a purely 11n-compliant station. In
particular the information elements included in management frames for old devices are different.
When compatibility support is enabled both standard and compatible data will be provided and/or
accepted.

IEEE80211_IOC_HTCONF
Return the setting for automatic promotion of HT channels in i_val. Promotion happens when the
system must select a channel and may choose between legacy, HT20, and HT40 operation (e.g. when
scanning). Valid values are: 0 (do not promote, use legacy), 1 (promote to HT20), and 2 (promote
to HT40).

IEEE80211_IOC_HTPROTMODE
Return, in i_val, the technique used to protect HT frames in a mixed 802.11n network. Valid values
are: IEEE80211_PROTMODE_OFF (no protection enabled) and IEEE80211_PROTMODE_RTSCTS (send RTS and
wait for CTS).

IEEE80211_IOC_HWMP_MAXHOPS
Return the maximum acceptable hop count in an HWMP path in i_val.

IEEE80211_IOC_HWMP_ROOTMODE
Return the setting for Mesh root mode operation in i_val. Valid values are:
IEEE80211_HWMP_ROOTMODE_DISABLED (root mode is disabled), IEEE80211_HWMP_ROOTMODE_NORMAL (send
broadcast Path Request frames), IEEE80211_HWMP_ROOTMODE_PROACTIVE (send broadcast Path Request
frames and force replies) and IEEE80211_HWMP_ROOTMODE_RANN (send broadcast Root Announcement (RANN)
frames).

IEEE80211_IOC_IC_NAME
Return the underlying hardware device(9) name in the buffer pointed to by i_data and the name
length including terminating NUL character in i_len. If the buffer length is too small to hold the
full name EINVAL will be returned.

IEEE80211_IOC_INACTIVITY
Return whether or not the system handles inactivity processing in i_val. When inactivity
processing is enabled the system will track stations that have not transmitted frames and
periodically probe them to check if they are still present. Stations that are inactive and do not
respond to probes are dropped.

IEEE80211_IOC_MACCMD
Return information about the state of the MAC address access control list (ACL) system. There are
two requests supported: IEEE80211_MACCMD_POLICY (to retrieve the current policy in i_val ), and
IEEE80211_MACCMD_LIST to retrieve the list installed/active ACL's via i_data. The wlan_acl(4)
module must be installed and enabled or EINVAL will be returned.

IEEE80211_IOC_MESH_AP
Return whether or not Mesh AP support is enabled in i_val.

IEEE80211_IOC_MESH_ID
Return the Mesh ID in the buffer pointed to by i_data.

IEEE80211_IOC_MESH_FWRD
Return whether or not packet forwarding support is enabled in i_val.

IEEE80211_IOC_MESH_PP_METRIC
Return the link metric protocol in the buffer pointed to by i_data.

IEEE80211_IOC_MESH_PP_PATH
Return the path selection protocol in the buffer pointed to by i_data.

IEEE80211_IOC_MESH_RTCMD
Return information about the state of the Mesh routing tables. One request is supported:
IEEE80211_MESH_RTCMD_LIST to retrieve the contents of the routing table in the buffer pointed to by
i_data.

IEEE80211_IOC_MESH_TTL
Return, in i_val, the Mesh Time To Live (TTL) setting installed in packets transmitted by this mesh
node.

IEEE80211_IOC_NUMSSIDS
Return the number of SSIDs supported in i_val.

IEEE80211_IOC_NUMWEPKEYS
Return the number of WEP keys supported in i_val.

IEEE80211_IOC_POWERSAVE
Return the current powersaving mode in i_val. Valid values are IEEE80211_POWERSAVE_OFF (power save
operation is disabled) and IEEE80211_POWERSAVE_ON (power save operation is enabled).

IEEE80211_IOC_POWERSAVESLEEP
Return the powersave sleep time in TU in i_val. This value is also termed the listen interval and
represents the maximum time a station will sleep before waking to retrieve packets buffered by an
access point.

IEEE80211_IOC_PRIVACY
Return the current MLME setting for PRIVACY in i_val. When PRIVACY is enabled all data packets
must be encrypted. This value will be zero if PRIVACY is disabled and non-zero when PRIVACY is
enabled.

IEEE80211_IOC_PROTMODE
Return the current 802.11g protection mode in i_val. Protection is the mechanism used to safeguard
802.11b stations operating on an 802.11g network. Valid values are IEEE80211_PROTMODE_OFF (no
protection enabled), IEEE80211_PROTMODE_CTS (send CTS to yourself), and IEEE80211_PROTMODE_RTSCTS
(send RTS and wait for CTS).

IEEE80211_IOC_PUREG
Return whether ``pure 11g'' mode is enabled in i_val. This setting is meaningful only for access
point operation; when non-zero, 802.11b stations will not be allowed to associate.

IEEE80211_IOC_PUREN
Return whether ``pure 11n'' mode is enabled in i_val. This setting is meaningful only for access
point operation; when non-zero, legacy (non-11n capable) stations will not be allowed to associate.

IEEE80211_IOC_REGDOMAIN
Return the regulatory state in the buffer pointed to by i_data.

IEEE80211_IOC_RIFS
Return whether or not Reduced InterFrame Spacing (RIFS) is enabled in i_val. This setting is
meaningful only when operating with 802.11n on an HT channel.

IEEE80211_IOC_ROAM
Return station roaming parameters in the buffer pointed to by i_data.

IEEE80211_IOC_ROAMING
Return the current roaming mode in i_val. Roaming mode specifies which entity controls operation
of the MLME state machine when operating as a station in an Infrastructure BSS. Valid values are:
IEEE80211_ROAMING_DEVICE (driver/firmware is in control), IEEE80211_ROAMING_AUTO (host 802.11 layer
is in control), and IEEE80211_ROAMING_MANUAL (application is in control).

IEEE80211_IOC_RTSTHRESHOLD
Return the threshold (in bytes) for enabling transmission of RTS frames in i_val. Packets larger
than this value will automatically have an RTS frame sent preceding it to reduce the likelihood of
packet loss.

IEEE80211_IOC_SCAN_RESULTS
Return the current contents of the scan cache in the data area pointed to by i_data.

IEEE80211_IOC_SCANVALID
Return in i_val how long (in seconds) results from a scan operation will be considered valid. When
scan results are no longer valid and they are needed (e.g. to roam) the system will initiate a scan
operation to replenish the scan cache.

IEEE80211_IOC_SHORTGI
Return whether or not Short Guard Interval (SGI) is enabled in i_val. Note SGI is only used when
operating with 802.11n on an HT channel.

IEEE80211_IOC_SMPS
Return the Spatial Multiplexing Power Save (SMPS) setting in i_val. This setting is meaningful
only when operating with 802.11n on an HT channel. Valid values are: IEEE80211_HTCAP_SMPS_DYNAMIC
(Dynamic SMPS is enabled), IEEE80211_HTCAP_SMPS_ENA (Static SMPS is enabled), and
IEEE80211_HTCAP_SMPS_OFF (SMPS is disabled).

IEEE80211_IOC_SSID
Return the requested SSID in the buffer pointed to by i_data. If i_val is ≥ 0 then the request
refers to the configured value for that slot. Generally, 0 is the only valid value, but some
interfaces support more SSIDs.

IEEE80211_IOC_STA_INFO
Return information about the current state of the specified station(s) via i_data. The MAC address
of a single station may be passed in or, if the broadcast address is supplied, information about
all stations will be returned. If a single station is requested and the MAC address is unknown
then ENOENT will be returned.

IEEE80211_IOC_STA_STATS
Return collected statistics for the specified station via i_data. The MAC address of the desired
station is passed in; if it is unknown ENOENT will be returned.

IEEE80211_IOC_STA_VLAN
Return any VLAN tag assigned to a station via i_data.

IEEE80211_IOC_TDMA_SLOT
Return the slot number for the station in i_val. Slot number zero is the master station in a TDMA
network.

IEEE80211_IOC_TDMA_SLOTCNT
Return the count of slots in the TDMA network in i_val.

IEEE80211_IOC_TDMA_SLOTLEN
Return the length (in usecs) of the TDMA slot assigned to each station in the network in i_val.

IEEE80211_IOC_TDMA_BINTERVAL
Return the number of superframes between Beacon frames in i_val. A TDMA network with N slots and
slot length T has a superframe of NxT.

IEEE80211_IOC_TSN
Return whether or not Transitional Security Network (TSN) is enabled in i_val.

IEEE80211_IOC_TURBOP
Return whether Atheros Dynamic Turbo mode is enabled in i_val. Dynamic Turbo mode is a non-
standard protocol extension available only on Atheros devices where channel width is dynamically
changed between 20MHz and 40MHz. Note that enabling Dynamic Turbo mode support does not guarantee
use; both client and access point must use Atheros devices and support must be enabled on both
sides.

IEEE80211_IOC_TXPARAMS
Return transmit parameters in the buffer pointed to by i_data.

IEEE80211_IOC_TXPOWER
Return the transmit power limit in .5 dBm units in i_val. This value represents the effective
maximum and is calculated according to the maximum power allowed by local regulations, any user-
specified power limit, and the maximum power the device is capable of.

IEEE80211_IOC_TXPOWMAX
Return the user-specified maximum transmit power in .5 dBm units in i_val. The maximum setting is
applied after any regulatory cap.

IEEE80211_IOC_WEP
Return the current WEP status in i_val. Valid values are: IEEE80211_WEP_ON (enabled for all
packets sent and received), IEEE80211_WEP_OFF (disabled), and IEEE80211_WEP_MIXED (enabled for
transmit and receive but also willing to receive unencrypted frames). This request is deprecated;
use IEEE80211_IOC_PRIVACY and IEEE80211_IOC_UNENCRYPTED instead.

IEEE80211_IOC_WEPKEY
Return the requested WEP key via i_data. The key number is specified in i_val and may be 0-3. If
the device does not support returning the WEP key or the user is not root then the key may be
returned as all zeros. This request is deprecated in favor of IEEE80211_IOC_WPAKEY.

IEEE80211_IOC_WEPTXKEY
Return the number of the WEP key used for transmission in i_val.

IEEE80211_IOC_WME
Return whether 802.11e/WME/WMM support is enabled in i_val. This value will be non-zero when
support is enabled and otherwise zero.

IEEE80211_IOC_WME_CWMIN
Return the WME CWmin setting (log2) for the specified Access Class (AC) in i_val. The AC is passed
in through i_len together with an optional IEEE80211_WMEPARAM_BSS flag to indicate if the parameter
for the BSS or the channel is desired. If WME is not supported then EINVAL will be returned.

IEEE80211_IOC_WME_CWMAX
Return the WME CWmax setting (log2) for the specified Access Class (AC) in i_val. See
IEEE80211_IOC_WME_CWMIN above for more details.

IEEE80211_IOC_WME_AIFS
Return the WME AIFS setting for the specified Access Class (AC) in i_val. See
IEEE80211_IOC_WME_CWMIN above for more details.

IEEE80211_IOC_WME_TXOPLIMIT
Return the WME TxOpLimit (msec) for the specified Access Class (AC) in i_val. See
IEEE80211_IOC_WME_CWMIN above for more details.

IEEE80211_IOC_WME_ACM
Return the WME Admission Control Mechanism (ACM) setting for the specified Access Class (AC) in
i_val. This value is meaningful only for the BSS (not channel). See IEEE80211_IOC_WME_CWMIN above
for more details.

IEEE80211_IOC_WME_ACKPOLICY
Return the WME ACK Policy setting for the specified Access Class (AC) in i_val. When this value is
zero frames will be transmitted without waiting for an Acknowledgement. This value is meaningful
only for the channel (not BSS). See IEEE80211_IOC_WME_CWMIN above for more details.

IEEE80211_IOC_WPA
Return the WPA configuration in i_val. Valid values are 0 (WPA is not enabled), 1 (WPA1 is
enabled), 2 (WPA2/802.11i is enabled), and 3 (WPA1 and WPA2/802.11i are both enabled).

IEEE80211_IOC_WPAIE
Return any WPA information element for an associated station via i_data. The request passed in
through i_data identifies the MAC address of the desired station. If an RSN (802.11i) element is
present it is returned; otherwise any WPA element is returned. Note this request is deprecated;
use IEEE80211_IOC_WPAIE2 instead.

IEEE80211_IOC_WPAIE2
Return any WPA information elements for an associated station via i_data. The request passed in
through i_data identifies the MAC address of the desired station. One or both of RSN (802.11i) and
WPA elements may be returned.

IEEE80211_IOC_WPAKEY
Return the requested cryptographic key in the buffer pointed to by i_data. The key number is
specified in i_val and may be 0-3. A key number of zero is used to retrieve a station's unicast
cipher key when operating with WPA enabled. If the user is not root then the key data returned is
all zeros.

IEEE80211_IOC_WPS
Return whether or not Wi-FI Protected Setup (WPS) is enabled in i_val.

For SIOCS80211 the following values of i_type are valid. Note that changing a value on an interface that
is running may cause the interface to be ‘reset’. Resets may be handled without altering the state if the
parameter does not affect the MLME state (e.g. RTS threshold), but in some cases the interface may need to
scan for a new network or clear state (including any associated stations); in that case the interface is
said to be ‘restarted’ (it is equivalent to marking the interface down and back up). The information below
identifies whether changing a value affects the state of a running interface.

IEEE80211_IOC_ADDMAC
Add an entry to the MAC address Access Control List (ACL) database using the value pointed to by
i_data. The wlan_acl(4) module must be installed and enabled or EINVAL will be returned.

IEEE80211_IOC_AMPDU
Set whether or not AMPDU is enabled for transmit and/or receive using the value in i_val. This
request causes a running interface operating on an HT channel to be reset. See IEEE80211_IOC_AMPDU
above for details.

IEEE80211_IOC_AMPDU_DENSITY
Set the minimum density for bursting AMPDU frames to the value in i_val. This request causes a
running interface to be reset. See IEEE80211_IOC_AMPDU_DENSITY above for details.

IEEE80211_IOC_AMPDU_LIMIT
Set the limit on the size of AMPDU frames to the value in i_val. This request causes a running
interface to be reset. See IEEE80211_IOC_AMPDU_LIMIT above for details.

IEEE80211_IOC_AMSDU
Set whether or not AMSDU is enabled for transmit and/or receive using the value in i_val. This
request causes a running interface operating on an HT channel to be reset. See IEEE80211_IOC_AMSDU
above for details.

IEEE80211_IOC_AMSDU_LIMIT
Set the limit on the size of AMSDU frames to the value in i_val. This request causes a running
interface to be reset. See IEEE80211_IOC_AMSDU_LIMIT above for details.

IEEE80211_IOC_APBRIDGE
Set whether AP bridging is enabled using the value in i_val. See IEEE80211_IOC_APBRIDGE above for
details.

IEEE80211_IOC_APPIE
Set an application information element using the data pointed to by i_data. This request causes a
running interface to be restarted if the WPA information element is changed. See
IEEE80211_IOC_APPIE above for details.

IEEE80211_IOC_AUTHMODE
Set the current authentication mode using the value in i_val. This request causes a running
interface to be restarted. See IEEE80211_IOC_AUTHMODE above for details. This request causes a
running interface to be restarted.

IEEE80211_IOC_BEACON_INTERVAL
Set the time between Beacon frames (in TU) to the value in i_val. This request causes a running
interface to be restarted.

IEEE80211_IOC_BGSCAN
Set whether background scanning is enabled using the value in i_val.

IEEE80211_IOC_BGSCAN_IDLE
Set the minimum time (in msecs) a station must be idle before it will do a background scan to the
value in i_val.

IEEE80211_IOC_BGSCAN_INTERVAL
Set the minimum time (seconds) between background scan operations to the value in i_val.

IEEE80211_IOC_BMISSTHRESHOLD
Set the number of consecutive missed Beacon frames before the system will attempt to roam to the
value in i_val. This request causes a running interface to be reset.

IEEE80211_IOC_BSSID
Set the 802.11 MAC address for the desired BSS identifier according to i_data. This request causes
a running interface to be restarted.

IEEE80211_IOC_BURST
Set whether or not packet bursting is enabled using the value in i_val. This request causes a
running interface to be reset.

IEEE80211_IOC_CHANNEL
Set the desired/current channel to the value given by i_val. This request causes a running
interface to immediately change to the specified channel if possible; otherwise the interface will
be restarted. Note this request is deprecated; use IEEE80211_IOC_CURCHAN instead.

IEEE80211_IOC_CHANLIST
Set the list of available channels using the channel list pointed to by i_data. The channel list
is a bit vector with bit N set to 1 if IEEE channel number N is available for use. The specified
channel list is checked against the set of supported channels and any channels not supported are
silently ignored. If the intersection of the channel list and the supported channels is empty
EINVAL is returned. Note the current channel may be marked invalid after installing a new channel
list. This request causes a running interface to be restarted.

IEEE80211_IOC_COUNTERMEASURES
Set whether TKIP Countermeasures are enabled using the value in i_val. This request can only be
used when the authentication mode is set WPA; otherwise EOPNOTSUPP will be returned.

IEEE80211_IOC_CURCHAN
Set the current channel using the information referenced by i_data. This request causes a running
interface to immediately change to the specified channel if possible; otherwise the interface will
be restarted.

IEEE80211_IOC_DELKEY
Delete the key specified by the information referenced by i_data.

IEEE80211_IOC_DELMAC
Remove an entry in the MAC address Access Control List (ACL) database using the value pointed to by
i_data. The wlan_acl(4) module must be installed and enabled or EINVAL will be returned.

IEEE80211_IOC_DFS
Set whether or not Dynamic Frequency Selection (DFS) is enabled using the value in i_val. This
request will fail with EINVAL if 802.11h support is not enabled. See IEEE80211_IOC_DFS above for
details.

IEEE80211_IOC_DOTD
Set whether or not 802.11d support is enabled using the value in i_val. This request causes a
running interface to be restarted. See IEEE80211_IOC_DOTD above for details.

IEEE80211_IOC_DOTH
Return whether 802.11h support is enabled using the value in i_val. See IEEE80211_IOC_DOTH above
for details.

IEEE80211_IOC_DROPUNENCRYPTED
Set whether unencrypted packets transmit/received should be discarded using the value in i_val.

IEEE80211_IOC_DTIM_PERIOD
Set the period (in beacon intervals) between DTIM events to the value in i_val. This request
causes a running interface to be restarted.

IEEE80211_IOC_DWDS
Set whether or not Dynamic WDS support is enabled using the value in i_val. See IEEE80211_IOC_DWDS
above for details.

IEEE80211_IOC_FF
Set whether Atheros fast-frames support is enabled using the value in i_val. This request causes a
running interface to be restarted. See IEEE80211_IOC_FF above for details.

IEEE80211_IOC_FRAGTHRESHOLD
Set the threshold (in bytes) for enabling fragmentation frames using the value in i_val. This
request causes a running interface to be reset. See IEEE80211_IOC_FRAGTHRESHOLD above for details.

IEEE80211_IOC_GREENFIELD
Set whether or not Greenfield preamble use is enabled using the value in i_val. This request
causes a running interface to be reset. See IEEE80211_IOC_GREENFIELD above for details.

IEEE80211_IOC_HIDESSID
Set whether SSID hiding/cloaking is enabled using the value in i_val. This request causes a
running interface to be reset. See IEEE80211_IOC_HIDESSID above for details.

IEEE80211_IOC_HTCOMPAT
Set whether or not 802.11n compatibility support is enabled using the value in i_val. This request
causes a running interface to be reset if operating on HT channel. See IEEE80211_IOC_HTCOMPAT
above for details.

IEEE80211_IOC_HTCONF
Set automatic promotion of HT channels using the value in i_val. This request causes a running
interface to be restarted. See IEEE80211_IOC_HTCONF above for details.

IEEE80211_IOC_HTPROTMODE
Set the technique used to protect HT frames in a mixed 802.11n network using the value in i_val.
This request causes a running interface to be reset. See IEEE80211_IOC_HTPROTMODE above for
details.

IEEE80211_IOC_HWMP_MAXHOPS
Set the maximum acceptable hop count in an HWMP path according to i_val. Values must be in the
range [0-255].

IEEE80211_IOC_HWMP_ROOTMODE
Set the Mesh root mode operation according to i_val. Valid values are
IEEE80211_HWMP_ROOTMODE_DISABLED (root mode is disabled), IEEE80211_HWMP_ROOTMODE_NORMAL (send
broadcast Path Request frames), IEEE80211_HWMP_ROOTMODE_PROACTIVE (send broadcast Path Request
frames and force replies) and IEEE80211_HWMP_ROOTMODE_RANN (send broadcast Root Announcement (RANN)
frames).

IEEE80211_IOC_INACTIVITY
Set whether or not the system handles inactivity processing using the value in i_val. When
inactivity processing is enabled the system will track stations that have not transmitted frames
and periodically probe them to check if they are still present. Stations that are inactive and do
not respond to probes are dropped.

IEEE80211_IOC_MACCMD
Change the state of the MAC address Access Control List (ACL) system. There are several requests
supported: IEEE80211_MACCMD_POLICY_OPEN (set the current policy to disable ACL use),
IEEE80211_MACCMD_POLICY_ALLOW (set the current policy to allow only addresses listed in the
database), IEEE80211_MACCMD_POLICY_DENY (set the current policy to deny addresses listed in the
database), IEEE80211_MACCMD_POLICY_RADUS (set the current policy to enable use of a RADIUS
backend), IEEE80211_MACCMD_FLUSH (flush all addresses from the database), and
IEEE80211_MACCMD_DETACH (detach the ACL subsystem, disabling it). The wlan_acl(4) module must be
installed or EINVAL will be returned.

IEEE80211_IOC_MESH_AP
Set whether or not Mesh AP support is enabled using i_val.

IEEE80211_IOC_MESH_FWRD
Set whether or not packet forwarding support is enabled using i_val.

IEEE80211_IOC_MESH_ID
Set the Mesh ID using the value pointed to by i_data. A Mesh ID can be up to IEEE80211_MESHID_LEN
bytes long.

IEEE80211_IOC_MESH_PP_METRIC
Set the link metric protocol using the value pointed to by i_data.

IEEE80211_IOC_MESH_PP_PATH
Set the path selection protocol using the value pointed to by i_data.

IEEE80211_IOC_MESH_RTCMD
Manipulate the state of the Mesh routing tables. Several requests are supported:
IEEE80211_MESH_RTCMD_FLUSH (flush the contents of the routing table), IEEE80211_MESH_RTCMD_ADD (add
an entry for the MAC address specified in i_data and start the Peer discovery process), and
IEEE80211_MESH_RTCMD_DELETE (delete the entry corresponding to the MAC address specified in i_data
).

IEEE80211_IOC_MESH_TTL
Set the Mesh Time To Live (TTL) setting installed in packets transmitted by this mesh node using
i_val.

IEEE80211_IOC_MLME
Explicitly control the MLME state machine for a station using the MLME request pointed to by
i_data. There are several MLME operations supported: IEEE80211_MLME_ASSOC (request association to
an access point), IEEE80211_MLME_DIASSOC (diassociate the specified station), IEEE80211_MLME_DEAUTH
(deauthenticate the specified station), IEEE80211_MLME_AUHORIZE (mark the specified station
authorized to pass data frames), IEEE80211_MLME_UNAUTHORIZE (revoke the specified station's ability
to pass data frames), and IEEE80211_MLME_AUTH (request authentication to an access point). Note
when this facility is used for stations operating in infrastructure mode the roaming mode should be
set to manual.

IEEE80211_IOC_POWERSAVE
Set the current powersaving mode to the value in i_val. See IEEE80211_IOC_POWERSAVE above for
valid values. This request causes a running interface to be reset.

IEEE80211_IOC_POWERSAVESLEEP
Set the powersave sleep time in TU to the value in i_val. This request causes a running interface
to be reset.

IEEE80211_IOC_PRIVACY
Set the current MLME setting for PRIVACY using the value in i_val. See IEEE80211_IOC_PRIVACY above
for details.

IEEE80211_IOC_PROTMODE
Set the current 802.11g protection mode to the value in i_val. This request causes a running
interface to be reset. See IEEE80211_IOC_PROTMODE above for details. This request causes a
running interface to be reset.

IEEE80211_IOC_PUREG
Set whether ``pure 11g'' mode is enabled using the value in i_val. This request causes a running
interface to be restarted. See IEEE80211_IOC_PUREG above for details.

IEEE80211_IOC_PUREN
Set whether ``pure 11n'' mode is enabled using the value in i_val. This request causes a running
interface to be restarted. See IEEE80211_IOC_PUREN above for details.

IEEE80211_IOC_REGDOMAIN
Set the regulatory state using the data referenced by i_data. This request can only be issued when
all interfaces cloned from the underlying physical device are marked down; otherwise EBUSY is
returned. Note the new regulatory data may invalidate any desired channel.

IEEE80211_IOC_RIFS
Set whether or not Reduced InterFrame Spacing (RIFS) is enabled using the value in i_val. This
setting is meaningful only when operating with 802.11n on an HT channel. This request causes a
running interface to be reset.

IEEE80211_IOC_ROAM
Set station roaming parameters using the data pointed to by i_data.

IEEE80211_IOC_ROAMING
Set the current roaming mode to the value in i_val. See IEEE80211_IOC_ROAMING above for details.

IEEE80211_IOC_RTSTHRESHOLD
Set the threshold (in bytes) for enabling transmission of RTS frames to the value in i_val. This
request causes a running interface to be reset. See IEEE80211_IOC_RTSTHRESHOLD above for details.

IEEE80211_IOC_SCANVALID
Set the age (in seconds) that results from a scan operation will be considered valid. When scan
results are no longer valid and they are needed (e.g. to roam) the system will initiate a scan
operation to replenish the scan cache.

IEEE80211_IOC_SCAN_REQ
Request a scan operation using the parameters pointed to by i_val. The underlying device must be
running or ENXIO will be returned. Values for sr_duration, sr_mindwell, and sr_maxdwell shorter
than 1 clock tick are rounded up to a tick. If more SSID's are supplied than the system is capable
of handling the extra ones are silently ignored. If a scan operation is already in progress the
request will be (silently) ignored.

IEEE80211_IOC_SCAN_CANCEL
Cancel any pending/active scan operation.

IEEE80211_IOC_SHORTGI
Set whether or not Short Guard Interval (SGI) is enabled using the value in i_val. Note SGI is
only used when operating on an HT (802.11n) channel. This request causes a running interface to be
reset.

IEEE80211_IOC_SMPS
Set the Spatial Multiplexing Power Save (SMPS) setting to the value in i_val. This request causes
a running interface to be reset. See IEEE80211_IOC_SMPS above for details.

IEEE80211_IOC_SSID
Set the desired SSID using the value pointed to by i_data. The string may be at most
IEEE80211_NWID_LEN bytes. This request causes a running interface to be restarted.

IEEE80211_IOC_STA_STATS
Clear accumulated statistics for the specified station.

IEEE80211_IOC_STA_VLAN
Set the VLAN tag for the specified station using the information pointed to by i_data.

IEEE80211_IOC_TDMA_BINTERVAL
Set the interval between Beacon frames to the value in i_val. Values must be positive. This
request causes a running interface to be reset.

IEEE80211_IOC_TDMA_SLOT
Set the current TDMA slot to the value in i_val. Values must be in the range [0-slotcnt]. Slot 0
identifies the master in the TDMA network; if it running it will immediately start sending Beacon
frames.

IEEE80211_IOC_TDMA_SLOTCNT
Set the number of slots in the TDMA network to the value in i_val. This request causes a running
interface to be reset.

IEEE80211_IOC_TDMA_SLOTLEN
Set the length of the TDMA slot assigned to each station in the network to the value in i_val.
Slot lengths must be in the range 200 usecs to 1024 milliseconds (though values outside the range
1-200ms are unlikely to work well). This request causes a running interface to be reset.

IEEE80211_IOC_TSN
Set whether or not Transitional Security Network (TSN) is enabled using the value in i_val.

IEEE80211_IOC_TURBOP
Set whether Atheros Dynamic Turbo mode is enabled using the value in i_val. This request causes a
running interface to be restarted.

IEEE80211_IOC_TXPARAMS
Set transmit parameters using the data pointed to be i_data. This request causes a running
interface to be restarted.

IEEE80211_IOC_TXPOWER
Set the maximum transmit power limit in .5 dBm units to the value in i_val. This request causes a
running interface to be reset.

IEEE80211_IOC_WEP
Set the current WEP mode to the value in i_val. See IEEE80211_IOC_WEP above for valid values.
This request causes a running interface to be restarted. Note this request is deprecated; use
IEEE80211_IOC_PRIVACY and IEEE80211_IOC_DROPUNENCRYPTED instead.

IEEE80211_IOC_WEPKEY
Set the WEP key indicated by i_val using the data pointed to by i_data. Note this request is
deprecated; use IEEE80211_IOC_WPAKEY instead.

IEEE80211_IOC_WEPTXKEY
Set the default transmit key used for transmission to the value in i_val.

IEEE80211_IOC_WME
Set whether or not WME/WMM support is enabled using the value in i_val. This request causes a
running interface to be reset.

IEEE80211_IOC_WME_ACKPOLICY
Set the WME ACK Policy for the Access Class (AC) specified in i_len using the value in i_val.

IEEE80211_IOC_WME_ACM
Set the WME Admission Control Mechanism for the Access Class (AC) specified in i_len using the
value in i_val.

IEEE80211_IOC_WME_AIFS
Set the WME AIFS parameter for the Access Class (AC) specified in i_len using the value in i_val.

IEEE80211_IOC_WME_CWMAX
Set the WME CWmax parameter for the Access Class (AC) specified in i_len using the value in i_val.

IEEE80211_IOC_WME_CWMIN
Set the WME CWmin parameter for the Access Class (AC) specified in i_len using the value in i_val.

IEEE80211_IOC_WME_TXOPLIMIT
Set the WME TxOpLimit parameter for the Access Class (AC) specified in i_len using the value in
i_val.

IEEE80211_IOC_WPA
Set the WPA configuration using the value in i_val. This request causes a running interface to be
reset. See IEEE80211_IOC_WPA above for details.

IEEE80211_IOC_WPAKEY
Set the requested cryptographic key using data in the buffer pointed to by i_data. See
IEEE80211_IOC_WPAKEY for details.

IEEE80211_IOC_WPS
Set whether or not Wi-FI Protected Setup (WPS) is enabled using the value in i_val.

NAME

SYNOPSIS

DESCRIPTION

SEE ALSO