NET80211(4)

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.

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