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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" */
             u_int16_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 joing 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 curent 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 unecrypted 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_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
             trasmitted 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 acces 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 acces 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 tht 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 wil 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 This
             request causes a running interface to be restarted.  i_val.

     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 trasmitted 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 specifed
             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.

SEE ALSO

     ioctl(2), wlan(4), wlan_acl(4), wlan_xauth(4), ifconfig(8), hostapd(8), wpa_supplicant(8).