cregit-Linux how code gets into the kernel

Release 4.12 include/net/mac80211.h

Directory: include/net
 * mac80211 <-> driver interface
 * Copyright 2002-2005, Devicescape Software, Inc.
 * Copyright 2006-2007  Jiri Benc <>
 * Copyright 2007-2010  Johannes Berg <>
 * Copyright 2013-2014  Intel Mobile Communications GmbH
 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.

#ifndef MAC80211_H

#define MAC80211_H

#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/if_ether.h>
#include <linux/skbuff.h>
#include <linux/ieee80211.h>
#include <net/cfg80211.h>
#include <net/codel.h>
#include <asm/unaligned.h>

 * DOC: Introduction
 * mac80211 is the Linux stack for 802.11 hardware that implements
 * only partial functionality in hard- or firmware. This document
 * defines the interface between mac80211 and low-level hardware
 * drivers.

 * DOC: Calling mac80211 from interrupts
 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be
 * called in hardware interrupt context. The low-level driver must not call any
 * other functions in hardware interrupt context. If there is a need for such
 * call, the low-level driver should first ACK the interrupt and perform the
 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even
 * tasklet function.
 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also
 *       use the non-IRQ-safe functions!

 * DOC: Warning
 * If you're reading this document and not the header file itself, it will
 * be incomplete because not all documentation has been converted yet.

 * DOC: Frame format
 * As a general rule, when frames are passed between mac80211 and the driver,
 * they start with the IEEE 802.11 header and include the same octets that are
 * sent over the air except for the FCS which should be calculated by the
 * hardware.
 * There are, however, various exceptions to this rule for advanced features:
 * The first exception is for hardware encryption and decryption offload
 * where the IV/ICV may or may not be generated in hardware.
 * Secondly, when the hardware handles fragmentation, the frame handed to
 * the driver from mac80211 is the MSDU, not the MPDU.

 * DOC: mac80211 workqueue
 * mac80211 provides its own workqueue for drivers and internal mac80211 use.
 * The workqueue is a single threaded workqueue and can only be accessed by
 * helpers for sanity checking. Drivers must ensure all work added onto the
 * mac80211 workqueue should be cancelled on the driver stop() callback.
 * mac80211 will flushed the workqueue upon interface removal and during
 * suspend.
 * All work performed on the mac80211 workqueue must not acquire the RTNL lock.

 * DOC: mac80211 software tx queueing
 * mac80211 provides an optional intermediate queueing implementation designed
 * to allow the driver to keep hardware queues short and provide some fairness
 * between different stations/interfaces.
 * In this model, the driver pulls data frames from the mac80211 queue instead
 * of letting mac80211 push them via drv_tx().
 * Other frames (e.g. control or management) are still pushed using drv_tx().
 * Drivers indicate that they use this model by implementing the .wake_tx_queue
 * driver operation.
 * Intermediate queues (struct ieee80211_txq) are kept per-sta per-tid, with a
 * single per-vif queue for multicast data frames.
 * The driver is expected to initialize its private per-queue data for stations
 * and interfaces in the .add_interface and .sta_add ops.
 * The driver can't access the queue directly. To dequeue a frame, it calls
 * ieee80211_tx_dequeue(). Whenever mac80211 adds a new frame to a queue, it
 * calls the .wake_tx_queue driver op.
 * For AP powersave TIM handling, the driver only needs to indicate if it has
 * buffered packets in the driver specific data structures by calling
 * ieee80211_sta_set_buffered(). For frames buffered in the ieee80211_txq
 * struct, mac80211 sets the appropriate TIM PVB bits and calls
 * .release_buffered_frames().
 * In that callback the driver is therefore expected to release its own
 * buffered frames and afterwards also frames from the ieee80211_txq (obtained
 * via the usual ieee80211_tx_dequeue).

struct device;

 * enum ieee80211_max_queues - maximum number of queues
 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues.
 * @IEEE80211_MAX_QUEUE_MAP: bitmap with maximum queues set

enum ieee80211_max_queues {
IEEE80211_MAX_QUEUES =		16,

#define IEEE80211_INVAL_HW_QUEUE	0xff

 * enum ieee80211_ac_numbers - AC numbers as used in mac80211
 * @IEEE80211_AC_VO: voice
 * @IEEE80211_AC_VI: video
 * @IEEE80211_AC_BE: best effort
 * @IEEE80211_AC_BK: background

enum ieee80211_ac_numbers {
IEEE80211_AC_VO		= 0,
IEEE80211_AC_VI		= 1,
IEEE80211_AC_BE		= 2,
IEEE80211_AC_BK		= 3,

 * struct ieee80211_tx_queue_params - transmit queue configuration
 * The information provided in this structure is required for QoS
 * transmit queue configuration. Cf. IEEE 802.11
 * @aifs: arbitration interframe space [0..255]
 * @cw_min: minimum contention window [a value of the form
 *      2^n-1 in the range 1..32767]
 * @cw_max: maximum contention window [like @cw_min]
 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled
 * @acm: is mandatory admission control required for the access category
 * @uapsd: is U-APSD mode enabled for the queue

struct ieee80211_tx_queue_params {
u16 txop;
u16 cw_min;
u16 cw_max;
u8 aifs;
bool acm;
bool uapsd;

struct ieee80211_low_level_stats {
unsigned int dot11ACKFailureCount;
unsigned int dot11RTSFailureCount;
unsigned int dot11FCSErrorCount;
unsigned int dot11RTSSuccessCount;

 * enum ieee80211_chanctx_change - change flag for channel context
 * @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed
 * @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed
 * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed
 * @IEEE80211_CHANCTX_CHANGE_CHANNEL: switched to another operating channel,
 *      this is used only with channel switching with CSA
 * @IEEE80211_CHANCTX_CHANGE_MIN_WIDTH: The min required channel width changed

enum ieee80211_chanctx_change {

 * struct ieee80211_chanctx_conf - channel context that vifs may be tuned to
 * This is the driver-visible part. The ieee80211_chanctx
 * that contains it is visible in mac80211 only.
 * @def: the channel definition
 * @min_def: the minimum channel definition currently required.
 * @rx_chains_static: The number of RX chains that must always be
 *      active on the channel to receive MIMO transmissions
 * @rx_chains_dynamic: The number of RX chains that must be enabled
 *      after RTS/CTS handshake to receive SMPS MIMO transmissions;
 *      this will always be >= @rx_chains_static.
 * @radar_enabled: whether radar detection is enabled on this channel.
 * @drv_priv: data area for driver use, will always be aligned to
 *      sizeof(void *), size is determined in hw information.

struct ieee80211_chanctx_conf {
struct cfg80211_chan_def def;
struct cfg80211_chan_def min_def;


u8 rx_chains_static, rx_chains_dynamic;

bool radar_enabled;

	u8 drv_priv[0] __aligned(sizeof(void *));

 * enum ieee80211_chanctx_switch_mode - channel context switch mode
 * @CHANCTX_SWMODE_REASSIGN_VIF: Both old and new contexts already
 *      exist (and will continue to exist), but the virtual interface
 *      needs to be switched from one to the other.
 * @CHANCTX_SWMODE_SWAP_CONTEXTS: The old context exists but will stop
 *      to exist with this call, the new context doesn't exist but
 *      will be active after this call, the virtual interface switches
 *      from the old to the new (note that the driver may of course
 *      implement this as an on-the-fly chandef switch of the existing
 *      hardware context, but the mac80211 pointer for the old context
 *      will cease to exist and only the new one will later be used
 *      for changes/removal.)

enum ieee80211_chanctx_switch_mode {

 * struct ieee80211_vif_chanctx_switch - vif chanctx switch information
 * This is structure is used to pass information about a vif that
 * needs to switch from one chanctx to another.  The
 * &ieee80211_chanctx_switch_mode defines how the switch should be
 * done.
 * @vif: the vif that should be switched from old_ctx to new_ctx
 * @old_ctx: the old context to which the vif was assigned
 * @new_ctx: the new context to which the vif must be assigned

struct ieee80211_vif_chanctx_switch {
struct ieee80211_vif *vif;
struct ieee80211_chanctx_conf *old_ctx;
struct ieee80211_chanctx_conf *new_ctx;

 * enum ieee80211_bss_change - BSS change notification flags
 * These flags are used with the bss_info_changed() callback
 * to indicate which BSS parameter changed.
 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated),
 *      also implies a change in the AID.
 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed
 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed
 * @BSS_CHANGED_ERP_SLOT: slot timing changed
 * @BSS_CHANGED_HT: 802.11n parameters changed
 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed
 * @BSS_CHANGED_BEACON_INT: Beacon interval changed
 * @BSS_CHANGED_BSSID: BSSID changed, for whatever
 *      reason (IBSS and managed mode)
 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve
 *      new beacon (beaconing modes)
 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be
 *      enabled/disabled (beaconing modes)
 * @BSS_CHANGED_CQM: Connection quality monitor config changed
 * @BSS_CHANGED_IBSS: IBSS join status changed
 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed.
 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note
 *      that it is only ever disabled for station mode.
 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface.
 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP and IBSS mode)
 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode)
 * @BSS_CHANGED_PS: PS changed for this BSS (STA mode)
 * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface
 * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS)
 *      changed
 * @BSS_CHANGED_BEACON_INFO: Data from the AP's beacon became available:
 *      currently dtim_period only is under consideration.
 * @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed,
 *      note that this is only called when it changes after the channel
 *      context had been assigned.
 * @BSS_CHANGED_OCB: OCB join status changed
 * @BSS_CHANGED_MU_GROUPS: VHT MU-MIMO group id or user position changed
 * @BSS_CHANGED_KEEP_ALIVE: keep alive options (idle period or protected
 *      keep alive) changed.

enum ieee80211_bss_change {
BSS_CHANGED_HT			= 1<<4,
BSS_CHANGED_CQM			= 1<<10,
BSS_CHANGED_QOS			= 1<<13,
BSS_CHANGED_PS			= 1<<17,
BSS_CHANGED_P2P_PS		= 1<<19,
BSS_CHANGED_OCB                 = 1<<22,

	/* when adding here, make sure to change ieee80211_reconfig */

 * The maximum number of IPv4 addresses listed for ARP filtering. If the number
 * of addresses for an interface increase beyond this value, hardware ARP
 * filtering will be disabled.


 * enum ieee80211_event_type - event to be notified to the low level driver
 * @RSSI_EVENT: AP's rssi crossed the a threshold set by the driver.
 * @MLME_EVENT: event related to MLME
 * @BAR_RX_EVENT: a BAR was received
 * @BA_FRAME_TIMEOUT: Frames were released from the reordering buffer because
 *      they timed out. This won't be called for each frame released, but only
 *      once each time the timeout triggers.

enum ieee80211_event_type {

 * enum ieee80211_rssi_event_data - relevant when event type is %RSSI_EVENT
 * @RSSI_EVENT_HIGH: AP's rssi went below the threshold set by the driver.
 * @RSSI_EVENT_LOW: AP's rssi went above the threshold set by the driver.

enum ieee80211_rssi_event_data {

 * struct ieee80211_rssi_event - data attached to an %RSSI_EVENT
 * @data: See &enum ieee80211_rssi_event_data

struct ieee80211_rssi_event {
enum ieee80211_rssi_event_data data;

 * enum ieee80211_mlme_event_data - relevant when event type is %MLME_EVENT
 * @AUTH_EVENT: the MLME operation is authentication
 * @ASSOC_EVENT: the MLME operation is association
 * @DEAUTH_RX_EVENT: deauth received..
 * @DEAUTH_TX_EVENT: deauth sent.

enum ieee80211_mlme_event_data {

 * enum ieee80211_mlme_event_status - relevant when event type is %MLME_EVENT
 * @MLME_SUCCESS: the MLME operation completed successfully.
 * @MLME_DENIED: the MLME operation was denied by the peer.
 * @MLME_TIMEOUT: the MLME operation timed out.

enum ieee80211_mlme_event_status {

 * struct ieee80211_mlme_event - data attached to an %MLME_EVENT
 * @data: See &enum ieee80211_mlme_event_data
 * @status: See &enum ieee80211_mlme_event_status
 * @reason: the reason code if applicable

struct ieee80211_mlme_event {
enum ieee80211_mlme_event_data data;
enum ieee80211_mlme_event_status status;
u16 reason;

 * struct ieee80211_ba_event - data attached for BlockAck related events
 * @sta: pointer to the &ieee80211_sta to which this event relates
 * @tid: the tid
 * @ssn: the starting sequence number (for %BAR_RX_EVENT)

struct ieee80211_ba_event {
struct ieee80211_sta *sta;
u16 tid;
u16 ssn;

 * struct ieee80211_event - event to be sent to the driver
 * @type: The event itself. See &enum ieee80211_event_type.
 * @rssi: relevant if &type is %RSSI_EVENT
 * @mlme: relevant if &type is %AUTH_EVENT
 * @ba: relevant if &type is %BAR_RX_EVENT or %BA_FRAME_TIMEOUT
 * @u:union holding the fields above

struct ieee80211_event {
enum ieee80211_event_type type;
	union {
struct ieee80211_rssi_event rssi;
struct ieee80211_mlme_event mlme;
struct ieee80211_ba_event ba;
} u;

 * struct ieee80211_mu_group_data - STA's VHT MU-MIMO group data
 * This structure describes the group id data of VHT MU-MIMO
 * @membership: 64 bits array - a bit is set if station is member of the group
 * @position: 2 bits per group id indicating the position in the group

struct ieee80211_mu_group_data {
u8 membership[WLAN_MEMBERSHIP_LEN];

 * struct ieee80211_bss_conf - holds the BSS's changing parameters
 * This structure keeps information about a BSS (and an association
 * to that BSS) that can change during the lifetime of the BSS.
 * @assoc: association status
 * @ibss_joined: indicates whether this station is part of an IBSS
 *      or not
 * @ibss_creator: indicates if a new IBSS network is being created
 * @aid: association ID number, valid only when @assoc is true
 * @use_cts_prot: use CTS protection
 * @use_short_preamble: use 802.11b short preamble
 * @use_short_slot: use short slot time (only relevant for ERP)
 * @dtim_period: num of beacons before the next DTIM, for beaconing,
 *      valid in station mode only if after the driver was notified
 *      with the %BSS_CHANGED_BEACON_INFO flag, will be non-zero then.
 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old
 *      as it may have been received during scanning long ago). If the
 *      HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can
 *      only come from a beacon, but might not become valid until after
 *      association when a beacon is received (which is notified with the
 *      %BSS_CHANGED_DTIM flag.). See also sync_dtim_count important notice.
 * @sync_device_ts: the device timestamp corresponding to the sync_tsf,
 *      the driver/device can use this to calculate synchronisation
 *      (see @sync_tsf). See also sync_dtim_count important notice.
 * @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY
 *      is requested, see @sync_tsf/@sync_device_ts.
 *      IMPORTANT: These three sync_* parameters would possibly be out of sync
 *      by the time the driver will use them. The synchronized view is currently
 *      guaranteed only in certain callbacks.
 * @beacon_int: beacon interval
 * @assoc_capability: capabilities taken from assoc resp
 * @basic_rates: bitmap of basic rates, each bit stands for an
 *      index into the rate table configured by the driver in
 *      the current band.
 * @beacon_rate: associated AP's beacon TX rate
 * @mcast_rate: per-band multicast rate index + 1 (0: disabled)
 * @bssid: The BSSID for this BSS
 * @enable_beacon: whether beaconing should be enabled or not
 * @chandef: Channel definition for this BSS -- the hardware might be
 *      configured a higher bandwidth than this BSS uses, for example.
 * @mu_group: VHT MU-MIMO group membership data
 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation.
 *      This field is only valid when the channel is a wide HT/VHT channel.
 *      Note that with TDLS this can be the case (channel is HT, protection must
 *      be used from this field) even when the BSS association isn't using HT.
 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value
 *      implies disabled. As with the cfg80211 callback, a change here should
 *      cause an event to be sent indicating where the current value is in
 *      relation to the newly configured threshold.
 * @cqm_rssi_low: Connection quality monitor RSSI lower threshold, a zero value
 *      implies disabled.  This is an alternative mechanism to the single
 *      threshold event and can't be enabled simultaneously with it.
 * @cqm_rssi_high: Connection quality monitor RSSI upper threshold.
 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis
 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The
 *      may filter ARP queries targeted for other addresses than listed here.
 *      The driver must allow ARP queries targeted for all address listed here
 *      to pass through. An empty list implies no ARP queries need to pass.
 * @arp_addr_cnt: Number of addresses currently on the list. Note that this
 *      may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list
 *      array size), it's up to the driver what to do in that case.
 * @qos: This is a QoS-enabled BSS.
 * @idle: This interface is idle. There's also a global idle flag in the
 *      hardware config which may be more appropriate depending on what
 *      your driver/device needs to do.
 * @ps: power-save mode (STA only). This flag is NOT affected by
 *      offchannel/dynamic_ps operations.
 * @ssid: The SSID of the current vif. Valid in AP and IBSS mode.
 * @ssid_len: Length of SSID given in @ssid.
 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode.
 * @txpower: TX power in dBm
 * @txpower_type: TX power adjustment used to control per packet Transmit
 *      Power Control (TPC) in lower driver for the current vif. In particular
 *      TPC is enabled if value passed in %txpower_type is
 *      NL80211_TX_POWER_LIMITED (allow using less than specified from
 *      userspace), whereas TPC is disabled if %txpower_type is set to
 *      NL80211_TX_POWER_FIXED (use value configured from userspace)
 * @p2p_noa_attr: P2P NoA attribute for P2P powersave
 * @allow_p2p_go_ps: indication for AP or P2P GO interface, whether it's allowed
 *      to use P2P PS mechanism or not. AP/P2P GO is not allowed to use P2P PS
 *      if it has associated clients without P2P PS support.
 * @max_idle_period: the time period during which the station can refrain from
 *      transmitting frames to its associated AP without being disassociated.
 *      In units of 1000 TUs. Zero value indicates that the AP did not include
 *      a (valid) BSS Max Idle Period Element.
 * @protected_keep_alive: if set, indicates that the station should send an RSN
 *      protected frame to the AP to reset the idle timer at the AP for the
 *      station.

struct ieee80211_bss_conf {
const u8 *bssid;
	/* association related data */

bool assoc, ibss_joined;
bool ibss_creator;
u16 aid;
	/* erp related data */
bool use_cts_prot;
bool use_short_preamble;
bool use_short_slot;
bool enable_beacon;
u8 dtim_period;
u16 beacon_int;
u16 assoc_capability;
u64 sync_tsf;
u32 sync_device_ts;
u8 sync_dtim_count;
u32 basic_rates;
struct ieee80211_rate *beacon_rate;
int mcast_rate[NUM_NL80211_BANDS];
u16 ht_operation_mode;
s32 cqm_rssi_thold;
u32 cqm_rssi_hyst;
s32 cqm_rssi_low;
s32 cqm_rssi_high;
struct cfg80211_chan_def chandef;
struct ieee80211_mu_group_data mu_group;
__be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN];
int arp_addr_cnt;
bool qos;
bool idle;
bool ps;
u8 ssid[IEEE80211_MAX_SSID_LEN];
size_t ssid_len;
bool hidden_ssid;
int txpower;
enum nl80211_tx_power_setting txpower_type;
struct ieee80211_p2p_noa_attr p2p_noa_attr;
bool allow_p2p_go_ps;
u16 max_idle_period;
bool protected_keep_alive;

 * enum mac80211_tx_info_flags - flags to describe transmission information/status
 * These flags are used with the @flags member of &ieee80211_tx_info.
 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame.
 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence
 *      number to this frame, taking care of not overwriting the fragment
 *      number and increasing the sequence number only when the
 *      IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly
 *      assign sequence numbers to QoS-data frames but cannot do so correctly
 *      for non-QoS-data and management frames because beacons need them from
 *      that counter as well and mac80211 cannot guarantee proper sequencing.
 *      If this flag is set, the driver should instruct the hardware to
 *      assign a sequence number to the frame or assign one itself. Cf. IEEE
 *      802.11-2007 paragraph 3. This flag will always be set for
 *      beacons and always be clear for frames without a sequence number field.
 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack
 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination
 *      station
 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame
 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon
 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU
 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211.
 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted
 *      because the destination STA was in powersave mode. Note that to
 *      avoid race conditions, the filter must be set by the hardware or
 *      firmware upon receiving a frame that indicates that the station
 *      went to sleep (must be done on device to filter frames already on
 *      the queue) and may only be unset after mac80211 gives the OK for
 *      that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above),
 *      since only then is it guaranteed that no more frames are in the
 *      hardware queue.
 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged
 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status
 *      is for the whole aggregation.
 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned,
 *      so consider using block ack request (BAR).
 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be
 *      set by rate control algorithms to indicate probe rate, will
 *      be cleared for fragmented frames (except on the last fragment)
 * @IEEE80211_TX_INTFL_OFFCHAN_TX_OK: Internal to mac80211. Used to indicate
 *      that a frame can be transmitted while the queues are stopped for
 *      off-channel operation.
 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211,
 *      used to indicate that a pending frame requires TX processing before
 *      it can be sent out.
 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211,
 *      used to indicate that a frame was already retried due to PS
 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211,
 *      used to indicate frame should not be encrypted
 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll
 *      frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must
 *      be sent although the station is in powersave mode.
 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the
 *      transmit function after the current frame, this can be used
 *      by drivers to kick the DMA queue only if unset or when the
 *      queue gets full.
 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted
 *      after TX status because the destination was asleep, it must not
 *      be modified again (no seqno assignment, crypto, etc.)
 * @IEEE80211_TX_INTFL_MLME_CONN_TX: This frame was transmitted by the MLME
 *      code for connection establishment, this indicates that its status
 *      should kick the MLME state machine.
 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211
 *      MLME command (internal to mac80211 to figure out whether to send TX
 *      status to user space)
 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame
 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this
 *      frame and selects the maximum number of streams that it can use.
 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on
 *      the off-channel channel when a remain-on-channel offload is done
 *      in hardware -- normal packets still flow and are expected to be
 *      handled properly by the device.
 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP
 *      testing. It will be sent out with incorrect Michael MIC key to allow
 *      TKIP countermeasures to be tested.
 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate.
 *      This flag is actually used for management frame especially for P2P
 *      frames not being sent at CCK rate in 2GHz band.
 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period,
 *      when its status is reported the service period ends. For frames in
 *      an SP that mac80211 transmits, it is already set; for driver frames
 *      the driver may set this flag. It is also used to do the same for
 *      PS-Poll responses.
 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate.
 *      This flag is used to send nullfunc frame at minimum rate when
 *      the nullfunc is used for connection monitoring purpose.
 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it
 *      would be fragmented by size (this is optional, only used for
 *      monitor injection).
 * @IEEE80211_TX_STAT_NOACK_TRANSMITTED: A frame that was marked with
 *      IEEE80211_TX_CTL_NO_ACK has been successfully transmitted without
 *      any errors (like issues specific to the driver/HW).
 *      This flag must not be set for frames that don't request no-ack
 *      behaviour with IEEE80211_TX_CTL_NO_ACK.
 * Note: If you have to add new flags to the enumeration, then don't
 *       forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary.

enum mac80211_tx_info_flags {
IEEE80211_TX_CTL_NO_ACK			= BIT(2),
IEEE80211_TX_CTL_AMPDU			= BIT(6),
IEEE80211_TX_STAT_ACK			= BIT(9),
IEEE80211_TX_STAT_AMPDU			= BIT(10),
IEEE80211_TX_INTFL_NL80211_FRAME_TX	= BIT(21),
IEEE80211_TX_CTL_LDPC			= BIT(22),
IEEE80211_TX_CTL_STBC			= BIT(23) | BIT(24),

#define IEEE80211_TX_CTL_STBC_SHIFT		23

 * enum mac80211_tx_control_flags - flags to describe transmit control
 * @IEEE80211_TX_CTRL_PORT_CTRL_PROTO: this frame is a port control
 *      protocol frame (e.g. EAP)
 * @IEEE80211_TX_CTRL_PS_RESPONSE: This frame is a response to a poll
 *      frame (PS-Poll or uAPSD).
 * @IEEE80211_TX_CTRL_RATE_INJECT: This frame is injected with rate information
 * @IEEE80211_TX_CTRL_AMSDU: This frame is an A-MSDU frame
 * @IEEE80211_TX_CTRL_FAST_XMIT: This frame is going through the fast_xmit path
 * These flags are used in tx_info->control.flags.

enum mac80211_tx_control_flags {

 * This definition is used as a mask to clear all temporary flags, which are
 * set by the tx handlers for each transmission attempt by the mac80211 stack.

#define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK |                    \
        IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU |           \
        IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK |               \
        IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK |           \
        IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC |                \

 * enum mac80211_rate_control_flags - per-rate flags set by the
 *      Rate Control algorithm.
 * These flags are set by the Rate control algorithm for each rate during tx,
 * in the @flags member of struct ieee80211_tx_rate.
 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate.
 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required.
 *      This is set if the current BSS requires ERP protection.
 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble.
 * @IEEE80211_TX_RC_MCS: HT rate.
 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split
 *      into a higher 4 bits (Nss) and lower 4 bits (MCS number)
 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in
 *      Greenfield mode.
 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz.
 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission
 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission
 *      (80+80 isn't supported yet)
 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the
 *      adjacent 20 MHz channels, if the current channel type is
 *      NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS.
 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate.

enum mac80211_rate_control_flags {

	/* rate index is an HT/VHT MCS instead of an index */
IEEE80211_TX_RC_MCS			= BIT(3),
IEEE80211_TX_RC_40_MHZ_WIDTH		= BIT(5),
IEEE80211_TX_RC_VHT_MCS			= BIT(8),
IEEE80211_TX_RC_80_MHZ_WIDTH		= BIT(9),
IEEE80211_TX_RC_160_MHZ_WIDTH		= BIT(10),

/* there are 40 bytes if you don't need the rateset to be kept */


/* if you do need the rateset, then you have less space */


/* maximum number of rate stages */

#define IEEE80211_TX_MAX_RATES	4

/* maximum number of rate table entries */

#define IEEE80211_TX_RATE_TABLE_SIZE	4

 * struct ieee80211_tx_rate - rate selection/status
 * @idx: rate index to attempt to send with
 * @flags: rate control flags (&enum mac80211_rate_control_flags)
 * @count: number of tries in this rate before going to the next rate
 * A value of -1 for @idx indicates an invalid rate and, if used
 * in an array of retry rates, that no more rates should be tried.
 * When used for transmit status reporting, the driver should
 * always report the rate along with the flags it used.
 * &struct ieee80211_tx_info contains an array of these structs
 * in the control information, and it will be filled by the rate
 * control algorithm according to what should be sent. For example,
 * if this array contains, in the format { <idx>, <count> } the
 * information::
 *    { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 }
 * then this means that the frame should be transmitted
 * up to twice at rate 3, up to twice at rate 2, and up to four
 * times at rate 1 if it doesn't get acknowledged. Say it gets
 * acknowledged by the peer after the fifth attempt, the status
 * information should then contain::
 *   { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ...
 * since it was transmitted twice at rate 3, twice at rate 2
 * and once at rate 1 after which we received an acknowledgement.

struct ieee80211_tx_rate {
s8 idx;
u16 count:5,

} __packed;

#define IEEE80211_MAX_TX_RETRY		31

static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, u8 mcs, u8 nss) { WARN_ON(mcs & ~0xF); WARN_ON((nss - 1) & ~0x7); rate->idx = ((nss - 1) << 4) | mcs; }


Johannes Berg4685.19%150.00%
Karl Beldan814.81%150.00%

static inline u8 ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) { return rate->idx & 0xF; }


Johannes Berg20100.00%1100.00%

static inline u8 ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) { return (rate->idx >> 4) + 1; }


Johannes Berg2083.33%150.00%
Karl Beldan416.67%150.00%

/** * struct ieee80211_tx_info - skb transmit information * * This structure is placed in skb->cb for three uses: * (1) mac80211 TX control - mac80211 tells the driver what to do * (2) driver internal use (if applicable) * (3) TX status information - driver tells mac80211 what happened * * @flags: transmit info flags, defined above * @band: the band to transmit on (use for checking for races) * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC * @ack_frame_id: internal frame ID for TX status, used internally * @control: union for control data * @status: union for status data * @driver_data: array of driver_data pointers * @ampdu_ack_len: number of acked aggregated frames. * relevant only if IEEE80211_TX_STAT_AMPDU was set. * @ampdu_len: number of aggregated frames. * relevant only if IEEE80211_TX_STAT_AMPDU was set. * @ack_signal: signal strength of the ACK frame */ struct ieee80211_tx_info { /* common information */ u32 flags; u8 band; u8 hw_queue; u16 ack_frame_id; union { struct { union { /* rate control */ struct { struct ieee80211_tx_rate rates[ IEEE80211_TX_MAX_RATES]; s8 rts_cts_rate_idx; u8 use_rts:1; u8 use_cts_prot:1; u8 short_preamble:1; u8 skip_table:1; /* 2 bytes free */ }; /* only needed before rate control */ unsigned long jiffies; }; /* NB: vif can be NULL for injected frames */ union { /* NB: vif can be NULL for injected frames */ struct ieee80211_vif *vif; /* When packets are enqueued on txq it's easy * to re-construct the vif pointer. There's no * more space in tx_info so it can be used to * store the necessary enqueue time for packet * sojourn time computation. */ codel_time_t enqueue_time; }; struct ieee80211_key_conf *hw_key; u32 flags; /* 4 bytes free */ } control; struct { u64 cookie; } ack; struct { struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; s32 ack_signal; u8 ampdu_ack_len; u8 ampdu_len; u8 antenna; u16 tx_time; void *status_driver_data[19 / sizeof(void *)]; } status; struct { struct ieee80211_tx_rate driver_rates[ IEEE80211_TX_MAX_RATES]; u8 pad[4]; void *rate_driver_data[ IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; }; void *driver_data[ IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; }; }; /** * struct ieee80211_tx_status - extended tx staus info for rate control * * @sta: Station that the packet was transmitted for * @info: Basic tx status information * @skb: Packet skb (can be NULL if not provided by the driver) */ struct ieee80211_tx_status { struct ieee80211_sta *sta; struct ieee80211_tx_info *info; struct sk_buff *skb; }; /** * struct ieee80211_scan_ies - descriptors for different blocks of IEs * * This structure is used to point to different blocks of IEs in HW scan * and scheduled scan. These blocks contain the IEs passed by userspace * and the ones generated by mac80211. * * @ies: pointers to band specific IEs. * @len: lengths of band_specific IEs. * @common_ies: IEs for all bands (especially vendor specific ones) * @common_ie_len: length of the common_ies */ struct ieee80211_scan_ies { const u8 *ies[NUM_NL80211_BANDS]; size_t len[NUM_NL80211_BANDS]; const u8 *common_ies; size_t common_ie_len; };
static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) { return (struct ieee80211_tx_info *)skb->cb; }


Johannes Berg24100.00%1100.00%

static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) { return (struct ieee80211_rx_status *)skb->cb; }


Johannes Berg24100.00%1100.00%

/** * ieee80211_tx_info_clear_status - clear TX status * * @info: The &struct ieee80211_tx_info to be cleared. * * When the driver passes an skb back to mac80211, it must report * a number of things in TX status. This function clears everything * in the TX status but the rate control information (it does clear * the count since you need to fill that in anyway). * * NOTE: You can only use this function if you do NOT use * info->driver_data! Use info->rate_driver_data * instead if you need only the less space that allows. */
static inline void ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) { int i; BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != offsetof(struct ieee80211_tx_info, control.rates)); BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != offsetof(struct ieee80211_tx_info, driver_rates)); BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); /* clear the rate counts */ for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) info->status.rates[i].count = 0; BUILD_BUG_ON( offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); memset(&info->status.ampdu_ack_len, 0, sizeof(struct ieee80211_tx_info) - offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); }


Johannes Berg14298.61%150.00%
Thomas Huehn21.39%150.00%

/** * enum mac80211_rx_flags - receive flags * * These flags are used with the @flag member of &struct ieee80211_rx_status. * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. * Use together with %RX_FLAG_MMIC_STRIPPED. * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, * verification has been done by the hardware. * @RX_FLAG_IV_STRIPPED: The IV and ICV are stripped from this frame. * If this flag is set, the stack cannot do any replay detection * hence the driver or hardware will have to do that. * @RX_FLAG_PN_VALIDATED: Currently only valid for CCMP/GCMP frames, this * flag indicates that the PN was verified for replay protection. * Note that this flag is also currently only supported when a frame * is also decrypted (ie. @RX_FLAG_DECRYPTED must be set) * @RX_FLAG_DUP_VALIDATED: The driver should set this flag if it did * de-duplication by itself. * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on * the frame. * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on * the frame. * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime * field) is valid and contains the time the first symbol of the MPDU * was received. This is useful in monitor mode and for proper IBSS * merging. * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime * field) is valid and contains the time the last symbol of the MPDU * (including FCS) was received. * @RX_FLAG_MACTIME_PLCP_START: The timestamp passed in the RX status (@mactime * field) is valid and contains the time the SYNC preamble was received. * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. * Valid only for data frames (mainly A-MPDU) * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference * number (@ampdu_reference) must be populated and be a distinct number for * each A-MPDU * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all * subframes of a single A-MPDU * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected * on this subframe * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC * is stored in the @ampdu_delimiter_crc field) * @RX_FLAG_MIC_STRIPPED: The mic was stripped of this packet. Decryption was * done by the hardware * @RX_FLAG_ONLY_MONITOR: Report frame only to monitor interfaces without * processing it in any regular way. * This is useful if drivers offload some frames but still want to report * them for sniffing purposes. * @RX_FLAG_SKIP_MONITOR: Process and report frame to all interfaces except * monitor interfaces. * This is useful if drivers offload some frames but still want to report * them for sniffing purposes. * @RX_FLAG_AMSDU_MORE: Some drivers may prefer to report separate A-MSDU * subframes instead of a one huge frame for performance reasons. * All, but the last MSDU from an A-MSDU should have this flag set. E.g. * if an A-MSDU has 3 frames, the first 2 must have the flag set, while * the 3rd (last) one must not have this flag set. The flag is used to * deal with retransmission/duplication recovery properly since A-MSDU * subframes share the same sequence number. Reported subframes can be * either regular MSDU or singly A-MSDUs. Subframes must not be * interleaved with other frames. * @RX_FLAG_RADIOTAP_VENDOR_DATA: This frame contains vendor-specific * radiotap data in the skb->data (before the frame) as described by * the &struct ieee80211_vendor_radiotap. * @RX_FLAG_ALLOW_SAME_PN: Allow the same PN as same packet before. * This is used for AMSDU subframes which can have the same PN as * the first subframe. * @RX_FLAG_ICV_STRIPPED: The ICV is stripped from this frame. CRC checking must * be done in the hardware. */ enum mac80211_rx_flags { RX_FLAG_MMIC_ERROR = BIT(0), RX_FLAG_DECRYPTED = BIT(1), RX_FLAG_MACTIME_PLCP_START = BIT(2), RX_FLAG_MMIC_STRIPPED = BIT(3), RX_FLAG_IV_STRIPPED = BIT(4), RX_FLAG_FAILED_FCS_CRC = BIT(5), RX_FLAG_FAILED_PLCP_CRC = BIT(6), RX_FLAG_MACTIME_START = BIT(7), RX_FLAG_NO_SIGNAL_VAL = BIT(8), RX_FLAG_AMPDU_DETAILS = BIT(9), RX_FLAG_PN_VALIDATED = BIT(10), RX_FLAG_DUP_VALIDATED = BIT(11), RX_FLAG_AMPDU_LAST_KNOWN = BIT(12), RX_FLAG_AMPDU_IS_LAST = BIT(13), RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(14), RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(15), RX_FLAG_MACTIME_END = BIT(16), RX_FLAG_ONLY_MONITOR = BIT(17), RX_FLAG_SKIP_MONITOR = BIT(18), RX_FLAG_AMSDU_MORE = BIT(19), RX_FLAG_RADIOTAP_VENDOR_DATA = BIT(20), RX_FLAG_MIC_STRIPPED = BIT(21), RX_FLAG_ALLOW_SAME_PN = BIT(22), RX_FLAG_ICV_STRIPPED = BIT(23), }; /** * enum mac80211_rx_encoding_flags - MCS & bandwidth flags * * @RX_ENC_FLAG_SHORTPRE: Short preamble was used for this frame * @RX_ENC_FLAG_SHORT_GI: Short guard interval was used * @RX_ENC_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, * if the driver fills this value it should add * %IEEE80211_RADIOTAP_MCS_HAVE_FMT * to hw.radiotap_mcs_details to advertise that fact * @RX_ENC_FLAG_LDPC: LDPC was used * @RX_ENC_FLAG_STBC_MASK: STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3 * @RX_ENC_FLAG_BF: packet was beamformed */ enum mac80211_rx_encoding_flags { RX_ENC_FLAG_SHORTPRE = BIT(0), RX_ENC_FLAG_SHORT_GI = BIT(2), RX_ENC_FLAG_HT_GF = BIT(3), RX_ENC_FLAG_STBC_MASK = BIT(4) | BIT(5), RX_ENC_FLAG_LDPC = BIT(6), RX_ENC_FLAG_BF = BIT(7), }; #define RX_ENC_FLAG_STBC_SHIFT 4 enum mac80211_rx_encoding { RX_ENC_LEGACY = 0, RX_ENC_HT, RX_ENC_VHT, }; /** * struct ieee80211_rx_status - receive status * * The low-level driver should provide this information (the subset * supported by hardware) to the 802.11 code with each received * frame, in the skb's control buffer (cb). * * @mactime: value in microseconds of the 64-bit Time Synchronization Function * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. * @boottime_ns: CLOCK_BOOTTIME timestamp the frame was received at, this is * needed only for beacons and probe responses that update the scan cache. * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use * it but can store it and pass it back to the driver for synchronisation * @band: the active band when this frame was received * @freq: frequency the radio was tuned to when receiving this frame, in MHz * This field must be set for management frames, but isn't strictly needed * for data (other) frames - for those it only affects radiotap reporting. * @signal: signal strength when receiving this frame, either in dBm, in dB or * unspecified depending on the hardware capabilities flags * @IEEE80211_HW_SIGNAL_* * @chains: bitmask of receive chains for which separate signal strength * values were filled. * @chain_signal: per-chain signal strength, in dBm (unlike @signal, doesn't * support dB or unspecified units) * @antenna: antenna used * @rate_idx: index of data rate into band's supported rates or MCS index if * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) * @nss: number of streams (VHT and HE only) * @flag: %RX_FLAG_\* * @encoding: &enum mac80211_rx_encoding * @bw: &enum rate_info_bw * @enc_flags: uses bits from &enum mac80211_rx_encoding_flags * @rx_flags: internal RX flags for mac80211 * @ampdu_reference: A-MPDU reference number, must be a different value for * each A-MPDU but the same for each subframe within one A-MPDU * @ampdu_delimiter_crc: A-MPDU delimiter CRC */ struct ieee80211_rx_status { u64 mactime; u64 boottime_ns; u32 device_timestamp; u32 ampdu_reference; u32 flag; u16 freq; u8 enc_flags; u8 encoding:2, bw:3; u8 rate_idx; u8 nss; u8 rx_flags; u8 band; u8 antenna; s8 signal; u8 chains; s8 chain_signal[IEEE80211_MAX_CHAINS]; u8 ampdu_delimiter_crc; }; /** * struct ieee80211_vendor_radiotap - vendor radiotap data information * @present: presence bitmap for this vendor namespace * (this could be extended in the future if any vendor needs more * bits, the radiotap spec does allow for that) * @align: radiotap vendor namespace alignment. This defines the needed * alignment for the @data field below, not for the vendor namespace * description itself (which has a fixed 2-byte alignment) * Must be a power of two, and be set to at least 1! * @oui: radiotap vendor namespace OUI * @subns: radiotap vendor sub namespace * @len: radiotap vendor sub namespace skip length, if alignment is done * then that's added to this, i.e. this is only the length of the * @data field. * @pad: number of bytes of padding after the @data, this exists so that * the skb data alignment can be preserved even if the data has odd * length * @data: the actual vendor namespace data * * This struct, including the vendor data, goes into the skb->data before * the 802.11 header. It's split up in mac80211 using the align/oui/subns * data. */ struct ieee80211_vendor_radiotap { u32 present; u8 align; u8 oui[3]; u8 subns; u8 pad; u16 len; u8 data[]; } __packed; /** * enum ieee80211_conf_flags - configuration flags * * Flags to define PHY configuration options * * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this * to determine for example whether to calculate timestamps for packets * or not, do not use instead of filter flags! * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). * This is the power save mode defined by IEEE 802.11-2007 section 11.2, * meaning that the hardware still wakes up for beacons, is able to * transmit frames and receive the possible acknowledgment frames. * Not to be confused with hardware specific wakeup/sleep states, * driver is responsible for that. See the section "Powersave support" * for more. * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set * the driver should be prepared to handle configuration requests but * may turn the device off as much as possible. Typically, this flag will * be set when an interface is set UP but not associated or scanning, but * it can also be unset in that case when monitor interfaces are active. * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main * operating channel. */ enum ieee80211_conf_flags { IEEE80211_CONF_MONITOR = (1<<0), IEEE80211_CONF_PS = (1<<1), IEEE80211_CONF_IDLE = (1<<2), IEEE80211_CONF_OFFCHANNEL = (1<<3), }; /** * enum ieee80211_conf_changed - denotes which configuration changed * * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed * @IEEE80211_CONF_CHANGE_POWER: the TX power changed * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed * Note that this is only valid if channel contexts are not used, * otherwise each channel context has the number of chains listed. */ enum ieee80211_conf_changed { IEEE80211_CONF_CHANGE_SMPS = BIT(1), IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), IEEE80211_CONF_CHANGE_MONITOR = BIT(3), IEEE80211_CONF_CHANGE_PS = BIT(4), IEEE80211_CONF_CHANGE_POWER = BIT(5), IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), IEEE80211_CONF_CHANGE_IDLE = BIT(8), }; /** * enum ieee80211_smps_mode - spatial multiplexing power save mode * * @IEEE80211_SMPS_AUTOMATIC: automatic * @IEEE80211_SMPS_OFF: off * @IEEE80211_SMPS_STATIC: static * @IEEE80211_SMPS_DYNAMIC: dynamic * @IEEE80211_SMPS_NUM_MODES: internal, don't use */ enum ieee80211_smps_mode { IEEE80211_SMPS_AUTOMATIC, IEEE80211_SMPS_OFF, IEEE80211_SMPS_STATIC, IEEE80211_SMPS_DYNAMIC, /* keep last */ IEEE80211_SMPS_NUM_MODES, }; /** * struct ieee80211_conf - configuration of the device * * This struct indicates how the driver shall configure the hardware. * * @flags: configuration flags defined above * * @listen_interval: listen interval in units of beacon interval * @ps_dtim_period: The DTIM period of the AP we're connected to, for use * in power saving. Power saving will not be enabled until a beacon * has been received and the DTIM period is known. * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the * powersave documentation below. This variable is valid only when * the CONF_PS flag is set. * * @power_level: requested transmit power (in dBm), backward compatibility * value only that is set to the minimum of all interfaces * * @chandef: the channel definition to tune to * @radar_enabled: whether radar detection is enabled * * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, * but actually means the number of transmissions not the number of retries * @short_frame_max_tx_count: Maximum number of transmissions for a "short" * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the * number of transmissions not the number of retries * * @smps_mode: spatial multiplexing powersave mode; note that * %IEEE80211_SMPS_STATIC is used when the device is not * configured for an HT channel. * Note that this is only valid if channel contexts are not used, * otherwise each channel context has the number of chains listed. */ struct ieee80211_conf { u32 flags; int power_level, dynamic_ps_timeout; u16 listen_interval; u8 ps_dtim_period; u8 long_frame_max_tx_count, short_frame_max_tx_count; struct cfg80211_chan_def chandef; bool radar_enabled; enum ieee80211_smps_mode smps_mode; }; /** * struct ieee80211_channel_switch - holds the channel switch data * * The information provided in this structure is required for channel switch * operation. * * @timestamp: value in microseconds of the 64-bit Time Synchronization * Function (TSF) timer when the frame containing the channel switch * announcement was received. This is simply the rx.mactime parameter * the driver passed into mac80211. * @device_timestamp: arbitrary timestamp for the device, this is the * rx.device_timestamp parameter the driver passed to mac80211. * @block_tx: Indicates whether transmission must be blocked before the * scheduled channel switch, as indicated by the AP. * @chandef: the new channel to switch to * @count: the number of TBTT's until the channel switch event */ struct ieee80211_channel_switch { u64 timestamp; u32 device_timestamp; bool block_tx; struct cfg80211_chan_def chandef; u8 count; }; /** * enum ieee80211_vif_flags - virtual interface flags * * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering * on this virtual interface to avoid unnecessary CPU wakeups * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality * monitoring on this virtual interface -- i.e. it can monitor * connection quality related parameters, such as the RSSI level and * provide notifications if configured trigger levels are reached. * @IEEE80211_VIF_SUPPORTS_UAPSD: The device can do U-APSD for this * interface. This flag should be set during interface addition, * but may be set/cleared as late as authentication to an AP. It is * only valid for managed/station mode interfaces. * @IEEE80211_VIF_GET_NOA_UPDATE: request to handle NOA attributes * and send P2P_PS notification to the driver if NOA changed, even * this is not pure P2P vif. */ enum ieee80211_vif_flags { IEEE80211_VIF_BEACON_FILTER = BIT(0), IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), IEEE80211_VIF_SUPPORTS_UAPSD = BIT(2), IEEE80211_VIF_GET_NOA_UPDATE = BIT(3), }; /** * struct ieee80211_vif - per-interface data * * Data in this structure is continually present for driver * use during the life of a virtual interface. * * @type: type of this virtual interface * @bss_conf: BSS configuration for this interface, either our own * or the BSS we're associated to * @addr: address of this interface * @p2p: indicates whether this AP or STA interface is a p2p * interface, i.e. a GO or p2p-sta respectively * @csa_active: marks whether a channel switch is going on. Internally it is * write-protected by sdata_lock and local->mtx so holding either is fine * for read access. * @mu_mimo_owner: indicates interface owns MU-MIMO capability * @driver_flags: flags/capabilities the driver has for this interface, * these need to be set (or cleared) when the interface is added * or, if supported by the driver, the interface type is changed * at runtime, mac80211 will never touch this field * @hw_queue: hardware queue for each AC * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only * @chanctx_conf: The channel context this interface is assigned to, or %NULL * when it is not assigned. This pointer is RCU-protected due to the TX * path needing to access it; even though the netdev carrier will always * be off when it is %NULL there can still be races and packets could be * processed after it switches back to %NULL. * @debugfs_dir: debugfs dentry, can be used by drivers to create own per * interface debug files. Note that it will be NULL for the virtual * monitor interface (if that is requested.) * @probe_req_reg: probe requests should be reported to mac80211 for this * interface. * @drv_priv: data area for driver use, will always be aligned to * sizeof(void \*). * @txq: the multicast data TX queue (if driver uses the TXQ abstraction) */ struct ieee80211_vif { enum nl80211_iftype type; struct ieee80211_bss_conf bss_conf; u8 addr[ETH_ALEN] __aligned(2); bool p2p; bool csa_active; bool mu_mimo_owner; u8 cab_queue; u8 hw_queue[IEEE80211_NUM_ACS]; struct ieee80211_txq *txq; struct ieee80211_chanctx_conf __rcu *chanctx_conf; u32 driver_flags; #ifdef CONFIG_MAC80211_DEBUGFS struct dentry *debugfs_dir; #endif unsigned int probe_req_reg; /* must be last */ u8 drv_priv[0] __aligned(sizeof(void *)); };
static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) { #ifdef CONFIG_MAC80211_MESH return vif->type == NL80211_IFTYPE_MESH_POINT; #endif return false; }


Johannes Berg27100.00%2100.00%

/** * wdev_to_ieee80211_vif - return a vif struct from a wdev * @wdev: the wdev to get the vif for * * This can be used by mac80211 drivers with direct cfg80211 APIs * (like the vendor commands) that get a wdev. * * Note that this function may return %NULL if the given wdev isn't * associated with a vif that the driver knows about (e.g. monitor * or AP_VLAN interfaces.) */ struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev); /** * ieee80211_vif_to_wdev - return a wdev struct from a vif * @vif: the vif to get the wdev for * * This can be used by mac80211 drivers with direct cfg80211 APIs * (like the vendor commands) that needs to get the wdev for a vif. * * Note that this function may return %NULL if the given wdev isn't * associated with a vif that the driver knows about (e.g. monitor * or AP_VLAN interfaces.) */ struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif); /** * enum ieee80211_key_flags - key flags * * These flags are used for communication about keys between the driver * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. * * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the * driver to indicate that it requires IV generation for this * particular key. Setting this flag does not necessarily mean that SKBs * will have sufficient tailroom for ICV or MIC. * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by * the driver for a TKIP key if it requires Michael MIC * generation in software. * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates * that the key is pairwise rather then a shared key. * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a * CCMP/GCMP key if it requires CCMP/GCMP encryption of management frames * (MFP) to be done in software. * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver * if space should be prepared for the IV, but the IV * itself should not be generated. Do not set together with * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. Setting this flag does * not necessarily mean that SKBs will have sufficient tailroom for ICV or * MIC. * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received * management frames. The flag can help drivers that have a hardware * crypto implementation that doesn't deal with management frames * properly by allowing them to not upload the keys to hardware and * fall back to software crypto. Note that this flag deals only with * RX, if your crypto engine can't deal with TX you can also set the * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. * @IEEE80211_KEY_FLAG_GENERATE_IV_MGMT: This flag should be set by the * driver for a CCMP/GCMP key to indicate that is requires IV generation * only for managment frames (MFP). * @IEEE80211_KEY_FLAG_RESERVE_TAILROOM: This flag should be set by the * driver for a key to indicate that sufficient tailroom must always * be reserved for ICV or MIC, even when HW encryption is enabled. */ enum ieee80211_key_flags { IEEE80211_KEY_FLAG_GENERATE_IV_MGMT = BIT(0), IEEE80211_KEY_FLAG_GENERATE_IV = BIT(1), IEEE80211_KEY_FLAG_GENERATE_MMIC = BIT(2), IEEE80211_KEY_FLAG_PAIRWISE = BIT(3), IEEE80211_KEY_FLAG_SW_MGMT_TX = BIT(4), IEEE80211_KEY_FLAG_PUT_IV_SPACE = BIT(5), IEEE80211_KEY_FLAG_RX_MGMT = BIT(6), IEEE80211_KEY_FLAG_RESERVE_TAILROOM = BIT(7), }; /** * struct ieee80211_key_conf - key information * * This key information is given by mac80211 to the driver by * the set_key() callback in &struct ieee80211_ops. * * @hw_key_idx: To be set by the driver, this is the key index the driver * wants to be given when a frame is transmitted and needs to be * encrypted in hardware. * @cipher: The key's cipher suite selector. * @tx_pn: PN used for TX keys, may be used by the driver as well if it * needs to do software PN assignment by itself (e.g. due to TSO) * @flags: key flags, see &enum ieee80211_key_flags. * @keyidx: the key index (0-3) * @keylen: key material length * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) * data block: * - Temporal Encryption Key (128 bits) * - Temporal Authenticator Tx MIC Key (64 bits) * - Temporal Authenticator Rx MIC Key (64 bits) * @icv_len: The ICV length for this key type * @iv_len: The IV length for this key type */ struct ieee80211_key_conf { atomic64_t tx_pn; u32 cipher; u8 icv_len; u8 iv_len; u8 hw_key_idx; u8 flags; s8 keyidx; u8 keylen; u8 key[0]; }; #define IEEE80211_MAX_PN_LEN 16 #define TKIP_PN_TO_IV16(pn) ((u16)(pn & 0xffff)) #define TKIP_PN_TO_IV32(pn) ((u32)((pn >> 16) & 0xffffffff)) /** * struct ieee80211_key_seq - key sequence counter * * @tkip: TKIP data, containing IV32 and IV16 in host byte order * @ccmp: PN data, most significant byte first (big endian, * reverse order than in packet) * @aes_cmac: PN data, most significant byte first (big endian, * reverse order than in packet) * @aes_gmac: PN data, most significant byte first (big endian, * reverse order than in packet) * @gcmp: PN data, most significant byte first (big endian, * reverse order than in packet) * @hw: data for HW-only (e.g. cipher scheme) keys */ struct ieee80211_key_seq { union { struct { u32 iv32; u16 iv16; } tkip; struct { u8 pn[6]; } ccmp; struct { u8 pn[6