Ubuntu Manpage: net80211 — standard interface to IEEE 802.11 devices

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NAME

     net80211 — standard interface to IEEE 802.11 devices

SYNOPSIS

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

DESCRIPTION

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

SIOCG80211 Get configuration or status information.

SIOCS80211 Set configuration information.

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

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

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

For SIOCG80211 the following values of i_type are valid:

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

IEEE80211_IOC_NUMSSIDS
Return the number of SSIDs supported in i_val.

IEEE80211_IOC_NUMWEPKEYS
Return the number of WEP keys supported in i_val.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

IEEE80211_IOC_SCAN_CANCEL
Cancel any pending/active scan operation.

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

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

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

IEEE80211_IOC_STA_STATS
Clear accumulated statistics for the specified station.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

NAME

SYNOPSIS

DESCRIPTION

SEE ALSO