--- name: "net80211" section: "4" platform: "freebsd" package: "base" version: "16.0-CURRENT-20261027-61c70dc16a79" release: "FreeBSD 16.0-CURRENT (2026-10-27)" platforms: ["freebsd"] url: "https://new.carta.tech/net80211" --- # net80211(4) standard interface to IEEE 802.11 devices ## NAME **net80211** – standard interface to IEEE 802.11 devices ## SYNOPSIS **#include \** **#include \** **#include \** **#include \** **#include \** ## 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)](/wlan/4.md) module for operation. The interface is via one of the following [ioctl(2)](/ioctl/2.md) 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)](/device/9.md) 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)](/wlan_acl/4.md) 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)](/wlan_acl/4.md) 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)](/wlan_acl/4.md) 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)](/wlan_acl/4.md) 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*. ## SEE ALSO [ioctl(2)](/ioctl/2.md), [wlan(4)](/wlan/4.md), [wlan\_acl(4)](/wlan_acl/4.md), [wlan\_xauth(4)](/wlan_xauth/4.md), [hostapd(8)](/hostapd/8.md), [ifconfig(8)](/ifconfig/8.md), [wpa\_supplicant(8)](/wpa_supplicant/8.md)