Man page 9 : struct_cfg80211_ops

struct_cfg80211_ops - backend description for wireless configuration

suspend
    wiphy device needs to be suspended. The variable wow will be NULL or contain the enabled Wake-on-Wireless triggers that are configured for the device.

resume
    wiphy device needs to be resumed

set_wakeup
    Called when WoWLAN is enabled/disabled, use this callback to call device_set_wakeup_enable to enable/disable wakeup from the device.

add_virtual_intf
    create a new virtual interface with the given name, must set the struct wireless_devAqs iftype. Beware: You must create the new netdev in the wiphyAqs network namespace! Returns the struct wireless_dev, or an ERR_PTR. For P2P device wdevs, the driver must also set the address member in the wdev.

del_virtual_intf
    remove the virtual interface

change_virtual_intf
    change type/configuration of virtual interface, keep the struct wireless_devAqs iftype updated.

add_key
    add a key with the given parameters. mac_addr will be NULL when adding a group key.

get_key
    get information about the key with the given parameters. mac_addr will be NULL when requesting information for a group key. All pointers given to the callback function need not be valid after it returns. This function should return an error if it is not possible to retrieve the key, -ENOENT if it doesnAqt exist.

del_key
    remove a key given the mac_addr (NULL for a group key) and key_index, return -ENOENT if the key doesnAqt exist.

set_default_key
    set the default key on an interface

set_default_mgmt_key
    set the default management frame key on an interface

start_ap
    Start acting in AP mode defined by the parameters.

change_beacon
    Change the beacon parameters for an access point mode interface. This should reject the call when AP mode wasnAqt started.

stop_ap
    Stop being an AP, including stopping beaconing.

add_station
    Add a new station.

del_station
    Remove a station; mac may be NULL to remove all stations.

change_station
    Modify a given station. Note that flags changes are not much validated in cfg80211, in particular the auth/assoc/authorized flags might come to the driver in invalid combinations -- make sure to check them, also against the existing state! Drivers must call cfg80211_check_station_change to validate the information.

get_station
    get station information for the station identified by mac

dump_station
    dump station callback -- resume dump at index idx

add_mpath
    add a fixed mesh path

del_mpath
    delete a given mesh path

change_mpath
    change a given mesh path

get_mpath
    get a mesh path for the given parameters

dump_mpath
    dump mesh path callback -- resume dump at index idx

get_mesh_config
    Get the current mesh configuration

update_mesh_config
    Update mesh parameters on a running mesh. The mask is a bitfield which tells us which parameters to set, and which to leave alone.

join_mesh
    join the mesh network with the specified parameters

leave_mesh
    leave the current mesh network

change_bss
    Modify parameters for a given BSS.

set_txq_params
    Set TX queue parameters

libertas_set_mesh_channel
    Only for backward compatibility for libertas, as it doesnAqt implement join_mesh and needs to set the channel to join the mesh instead.

set_monitor_channel
    Set the monitor mode channel for the device. If other interfaces are active this callback should reject the configuration. If no interfaces are active or the device is down, the channel should be stored for when a monitor interface becomes active.

scan
    Request to do a scan. If returning zero, the scan request is given the driver, and will be valid until passed to cfg80211_scan_done. For scan results, call cfg80211_inform_bss; you can call this outside the scan/scan_done bracket too.

auth
    Request to authenticate with the specified peer

assoc
    Request to (re)associate with the specified peer

deauth
    Request to deauthenticate from the specified peer

disassoc
    Request to disassociate from the specified peer

connect
    Connect to the ESS with the specified parameters. When connected, call cfg80211_connect_result with status code WLAN_STATUS_SUCCESS. If the connection fails for some reason, call cfg80211_connect_result with the status from the AP.

disconnect
    Disconnect from the BSS/ESS.

join_ibss
    Join the specified IBSS (or create if necessary). Once done, call cfg80211_ibss_joined, also call that function when changing BSSID due to a merge.

leave_ibss
    Leave the IBSS.

set_mcast_rate
    Set the specified multicast rate (only if vif is in ADHOC or MESH mode)

set_wiphy_params
    Notify that wiphy parameters have changed; changed bitfield (see enum wiphy_params_flags) describes which values have changed. The actual parameter values are available in struct wiphy. If returning an error, no value should be changed.

set_tx_power
    set the transmit power according to the parameters, the power passed is in mBm, to get dBm use MBM_TO_DBM. The wdev may be NULL if power was set for the wiphy, and will always be NULL unless the driver supports per-vif TX power (as advertised by the nl80211 feature flag.)

get_tx_power
    store the current TX power into the dbm variable; return 0 if successful

set_wds_peer
    set the WDS peer for a WDS interface

rfkill_poll
    polls the hw rfkill line, use cfg80211 reporting functions to adjust rfkill hw state

testmode_cmd
    run a test mode command

testmode_dump
    Implement a test mode dump. The cb->args[2] and up may be used by the function, but 0 and 1 must not be touched. Additionally, return error codes other than -ENOBUFS and -ENOENT will terminate the dump and return to userspace with an error, so be careful. If any data was passed in from userspace then the data/len arguments will be present and point to the data contained in NL80211_ATTR_TESTDATA.

set_bitrate_mask
    set the bitrate mask configuration

dump_survey
    get site survey information.

set_pmksa
    Cache a PMKID for a BSSID. This is mostly useful for fullmac devices running firmwares capable of generating the (re) association RSN IE. It allows for faster roaming between WPA2 BSSIDs.

del_pmksa
    Delete a cached PMKID.

flush_pmksa
    Flush all cached PMKIDs.

remain_on_channel
    Request the driver to remain awake on the specified channel for the specified duration to complete an off-channel operation (e.g., public action frame exchange). When the driver is ready on the requested channel, it must indicate this with an event notification by calling cfg80211_ready_on_channel.

cancel_remain_on_channel
    Cancel an on-going remain-on-channel operation. This allows the operation to be terminated prior to timeout based on the duration value.

mgmt_tx
    Transmit a management frame.

mgmt_tx_cancel_wait
    Cancel the wait time from transmitting a management frame on another channel

set_power_mgmt
    Configure WLAN power management. A timeout value of -1 allows the driver to adjust the dynamic ps timeout value.

set_cqm_rssi_config
    Configure connection quality monitor RSSI threshold.

set_cqm_txe_config
    Configure connection quality monitor TX error thresholds.

mgmt_frame_register
    Notify driver that a management frame type was registered. Note that this callback may not sleep, and cannot run concurrently with itself.

set_antenna
    Set antenna configuration (tx_ant, rx_ant) on the device. Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may reject TX/RX mask combinations they cannot support by returning -EINVAL (also see nl80211.h NL80211_ATTR_WIPHY_ANTENNA_TX).

get_antenna
    Get current antenna configuration from device (tx_ant, rx_ant).

set_ringparam
    Set tx and rx ring sizes.

get_ringparam
    Get tx and rx ring current and maximum sizes.

sched_scan_start
    Tell the driver to start a scheduled scan.

sched_scan_stop
    Tell the driver to stop an ongoing scheduled scan.

set_rekey_data
    give the data necessary for GTK rekeying to the driver

tdls_mgmt
    Transmit a TDLS management frame.

tdls_oper
    Perform a high-level TDLS operation (e.g. TDLS link setup).

probe_client
    probe an associated client, must return a cookie that it later passes to cfg80211_probe_status.

set_noack_map
    Set the NoAck Map for the TIDs.

get_et_sset_count
    Ethtool API to get string-set count. See ethtool_ops.get_sset_count

get_et_stats
    Ethtool API to get a set of u64 stats. See ethtool_ops.get_ethtool_stats

get_et_strings
    Ethtool API to get a set of strings to describe stats and perhaps other supported types of ethtool data-sets. See ethtool_ops.get_strings

get_channel
    Get the current operating channel for the virtual interface. For monitor interfaces, it should return NULL unless thereAqs a single current monitoring channel.

start_p2p_device
    Start the given P2P device.

stop_p2p_device
    Stop the given P2P device.

set_mac_acl
    Sets MAC address control list in AP and P2P GO mode. Parameters include ACL policy, an array of MAC address of stations and the number of MAC addresses. If there is already a list in driver this new list replaces the existing one. Driver has to clear its ACL when number of MAC addresses entries is passed as 0. Drivers which advertise the support for MAC based ACL have to implement this callback.

start_radar_detection
    Start radar detection in the driver.

update_ft_ies
    Provide updated Fast BSS Transition information to the driver. If the SME is in the driver/firmware, this information can be used in building Authentication and Reassociation Request frames.

crit_proto_start
    Indicates a critical protocol needs more link reliability for a given duration (milliseconds). The protocol is provided so the driver can take the most appropriate actions.

crit_proto_stop
    Indicates critical protocol no longer needs increased link reliability. This operation can not fail.

This struct is registered by fullmac card drivers and/or wireless stacks in order to handle configuration requests on their interfaces.

All callbacks except where otherwise noted should return 0 on success or a negative error code.

All operations are currently invoked under rtnl for consistency with the wireless extensions but this is subject to reevaluation as soon as this code is used more widely and we have a first user without wext.

Johannes Berg <>
    Author.