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mac80211.h
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mac80211.h
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/*
* mac80211 <-> driver interface
*
* Copyright 2002-2005, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <[email protected]>
* Copyright 2007 Johannes Berg <[email protected]>
*
* 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/kernel.h>
#include <linux/if_ether.h>
#include <linux/skbuff.h>
#include <linux/wireless.h>
#include <linux/device.h>
#include <linux/ieee80211.h>
#include <net/wireless.h>
#include <net/cfg80211.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 function.
*/
/**
* 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.
*
* Finally, for received frames, the driver is able to indicate that it has
* filled a radiotap header and put that in front of the frame; if it does
* not do so then mac80211 may add this under certain circumstances.
*/
#define IEEE80211_CHAN_W_SCAN 0x00000001
#define IEEE80211_CHAN_W_ACTIVE_SCAN 0x00000002
#define IEEE80211_CHAN_W_IBSS 0x00000004
/* Channel information structure. Low-level driver is expected to fill in chan,
* freq, and val fields. Other fields will be filled in by 80211.o based on
* hostapd information and low-level driver does not need to use them. The
* limits for each channel will be provided in 'struct ieee80211_conf' when
* configuring the low-level driver with hw->config callback. If a device has
* a default regulatory domain, IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED
* can be set to let the driver configure all fields */
struct ieee80211_channel {
short chan; /* channel number (IEEE 802.11) */
short freq; /* frequency in MHz */
int val; /* hw specific value for the channel */
int flag; /* flag for hostapd use (IEEE80211_CHAN_*) */
unsigned char power_level;
unsigned char antenna_max;
};
#define IEEE80211_RATE_ERP 0x00000001
#define IEEE80211_RATE_BASIC 0x00000002
#define IEEE80211_RATE_PREAMBLE2 0x00000004
#define IEEE80211_RATE_SUPPORTED 0x00000010
#define IEEE80211_RATE_OFDM 0x00000020
#define IEEE80211_RATE_CCK 0x00000040
#define IEEE80211_RATE_MANDATORY 0x00000100
#define IEEE80211_RATE_CCK_2 (IEEE80211_RATE_CCK | IEEE80211_RATE_PREAMBLE2)
#define IEEE80211_RATE_MODULATION(f) \
(f & (IEEE80211_RATE_CCK | IEEE80211_RATE_OFDM))
/* Low-level driver should set PREAMBLE2, OFDM and CCK flags.
* BASIC, SUPPORTED, ERP, and MANDATORY flags are set in 80211.o based on the
* configuration. */
struct ieee80211_rate {
int rate; /* rate in 100 kbps */
int val; /* hw specific value for the rate */
int flags; /* IEEE80211_RATE_ flags */
int val2; /* hw specific value for the rate when using short preamble
* (only when IEEE80211_RATE_PREAMBLE2 flag is set, i.e., for
* 2, 5.5, and 11 Mbps) */
signed char min_rssi_ack;
unsigned char min_rssi_ack_delta;
/* following fields are set by 80211.o and need not be filled by the
* low-level driver */
int rate_inv; /* inverse of the rate (LCM(all rates) / rate) for
* optimizing channel utilization estimates */
};
/**
* enum ieee80211_phymode - PHY modes
*
* @MODE_IEEE80211A: 5GHz as defined by 802.11a/802.11h
* @MODE_IEEE80211B: 2.4 GHz as defined by 802.11b
* @MODE_IEEE80211G: 2.4 GHz as defined by 802.11g (with OFDM),
* backwards compatible with 11b mode
* @NUM_IEEE80211_MODES: internal
*/
enum ieee80211_phymode {
MODE_IEEE80211A,
MODE_IEEE80211B,
MODE_IEEE80211G,
/* keep last */
NUM_IEEE80211_MODES
};
/**
* struct ieee80211_ht_info - describing STA's HT capabilities
*
* This structure describes most essential parameters needed
* to describe 802.11n HT capabilities for an STA.
*
* @ht_supported: is HT supported by STA, 0: no, 1: yes
* @cap: HT capabilities map as described in 802.11n spec
* @ampdu_factor: Maximum A-MPDU length factor
* @ampdu_density: Minimum A-MPDU spacing
* @supp_mcs_set: Supported MCS set as described in 802.11n spec
*/
struct ieee80211_ht_info {
u8 ht_supported;
u16 cap; /* use IEEE80211_HT_CAP_ */
u8 ampdu_factor;
u8 ampdu_density;
u8 supp_mcs_set[16];
};
/**
* struct ieee80211_ht_bss_info - describing BSS's HT characteristics
*
* This structure describes most essential parameters needed
* to describe 802.11n HT characteristics in a BSS
*
* @primary_channel: channel number of primery channel
* @bss_cap: 802.11n's general BSS capabilities (e.g. channel width)
* @bss_op_mode: 802.11n's BSS operation modes (e.g. HT protection)
*/
struct ieee80211_ht_bss_info {
u8 primary_channel;
u8 bss_cap; /* use IEEE80211_HT_IE_CHA_ */
u8 bss_op_mode; /* use IEEE80211_HT_IE_ */
};
/**
* struct ieee80211_hw_mode - PHY mode definition
*
* This structure describes the capabilities supported by the device
* in a single PHY mode.
*
* @list: internal
* @channels: pointer to array of supported channels
* @rates: pointer to array of supported bitrates
* @mode: the PHY mode for this definition
* @num_channels: number of supported channels
* @num_rates: number of supported bitrates
* @ht_info: PHY's 802.11n HT abilities for this mode
*/
struct ieee80211_hw_mode {
struct list_head list;
struct ieee80211_channel *channels;
struct ieee80211_rate *rates;
enum ieee80211_phymode mode;
int num_channels;
int num_rates;
struct ieee80211_ht_info ht_info;
};
/**
* struct ieee80211_tx_queue_params - transmit queue configuration
*
* The information provided in this structure is required for QoS
* transmit queue configuration.
*
* @aifs: arbitration interface space [0..255, -1: use default]
* @cw_min: minimum contention window [will be a value of the form
* 2^n-1 in the range 1..1023; 0: use default]
* @cw_max: maximum contention window [like @cw_min]
* @burst_time: maximum burst time in units of 0.1ms, 0 meaning disabled
*/
struct ieee80211_tx_queue_params {
int aifs;
int cw_min;
int cw_max;
int burst_time;
};
/**
* struct ieee80211_tx_queue_stats_data - transmit queue statistics
*
* @len: number of packets in queue
* @limit: queue length limit
* @count: number of frames sent
*/
struct ieee80211_tx_queue_stats_data {
unsigned int len;
unsigned int limit;
unsigned int count;
};
/**
* enum ieee80211_tx_queue - transmit queue number
*
* These constants are used with some callbacks that take a
* queue number to set parameters for a queue.
*
* @IEEE80211_TX_QUEUE_DATA0: data queue 0
* @IEEE80211_TX_QUEUE_DATA1: data queue 1
* @IEEE80211_TX_QUEUE_DATA2: data queue 2
* @IEEE80211_TX_QUEUE_DATA3: data queue 3
* @IEEE80211_TX_QUEUE_DATA4: data queue 4
* @IEEE80211_TX_QUEUE_SVP: ??
* @NUM_TX_DATA_QUEUES: number of data queues
* @IEEE80211_TX_QUEUE_AFTER_BEACON: transmit queue for frames to be
* sent after a beacon
* @IEEE80211_TX_QUEUE_BEACON: transmit queue for beacon frames
*/
enum ieee80211_tx_queue {
IEEE80211_TX_QUEUE_DATA0,
IEEE80211_TX_QUEUE_DATA1,
IEEE80211_TX_QUEUE_DATA2,
IEEE80211_TX_QUEUE_DATA3,
IEEE80211_TX_QUEUE_DATA4,
IEEE80211_TX_QUEUE_SVP,
NUM_TX_DATA_QUEUES,
/* due to stupidity in the sub-ioctl userspace interface, the items in
* this struct need to have fixed values. As soon as it is removed, we can
* fix these entries. */
IEEE80211_TX_QUEUE_AFTER_BEACON = 6,
IEEE80211_TX_QUEUE_BEACON = 7
};
struct ieee80211_tx_queue_stats {
struct ieee80211_tx_queue_stats_data data[NUM_TX_DATA_QUEUES];
};
struct ieee80211_low_level_stats {
unsigned int dot11ACKFailureCount;
unsigned int dot11RTSFailureCount;
unsigned int dot11FCSErrorCount;
unsigned int dot11RTSSuccessCount;
};
/**
* 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
*/
enum ieee80211_bss_change {
BSS_CHANGED_ASSOC = 1<<0,
BSS_CHANGED_ERP_CTS_PROT = 1<<1,
BSS_CHANGED_ERP_PREAMBLE = 1<<2,
};
/**
* 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
* @aid: association ID number, valid only when @assoc is true
* @use_cts_prot: use CTS protection
* @use_short_preamble: use 802.11b short preamble
*/
struct ieee80211_bss_conf {
/* association related data */
bool assoc;
u16 aid;
/* erp related data */
bool use_cts_prot;
bool use_short_preamble;
};
/* Transmit control fields. This data structure is passed to low-level driver
* with each TX frame. The low-level driver is responsible for configuring
* the hardware to use given values (depending on what is supported). */
struct ieee80211_tx_control {
struct ieee80211_vif *vif;
int tx_rate; /* Transmit rate, given as the hw specific value for the
* rate (from struct ieee80211_rate) */
int rts_cts_rate; /* Transmit rate for RTS/CTS frame, given as the hw
* specific value for the rate (from
* struct ieee80211_rate) */
#define IEEE80211_TXCTL_REQ_TX_STATUS (1<<0)/* request TX status callback for
* this frame */
#define IEEE80211_TXCTL_DO_NOT_ENCRYPT (1<<1) /* send this frame without
* encryption; e.g., for EAPOL
* frames */
#define IEEE80211_TXCTL_USE_RTS_CTS (1<<2) /* use RTS-CTS before sending
* frame */
#define IEEE80211_TXCTL_USE_CTS_PROTECT (1<<3) /* use CTS protection for the
* frame (e.g., for combined
* 802.11g / 802.11b networks) */
#define IEEE80211_TXCTL_NO_ACK (1<<4) /* tell the low level not to
* wait for an ack */
#define IEEE80211_TXCTL_RATE_CTRL_PROBE (1<<5)
#define IEEE80211_TXCTL_CLEAR_DST_MASK (1<<6)
#define IEEE80211_TXCTL_REQUEUE (1<<7)
#define IEEE80211_TXCTL_FIRST_FRAGMENT (1<<8) /* this is a first fragment of
* the frame */
#define IEEE80211_TXCTL_LONG_RETRY_LIMIT (1<<10) /* this frame should be send
* using the through
* set_retry_limit configured
* long retry value */
#define IEEE80211_TXCTL_EAPOL_FRAME (1<<11) /* internal to mac80211 */
#define IEEE80211_TXCTL_SEND_AFTER_DTIM (1<<12) /* send this frame after DTIM
* beacon */
u32 flags; /* tx control flags defined
* above */
u8 key_idx; /* keyidx from hw->set_key(), undefined if
* IEEE80211_TXCTL_DO_NOT_ENCRYPT is set */
u8 retry_limit; /* 1 = only first attempt, 2 = one retry, ..
* This could be used when set_retry_limit
* is not implemented by the driver */
u8 power_level; /* per-packet transmit power level, in dBm */
u8 antenna_sel_tx; /* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */
u8 icv_len; /* length of the ICV/MIC field in octets */
u8 iv_len; /* length of the IV field in octets */
u8 queue; /* hardware queue to use for this frame;
* 0 = highest, hw->queues-1 = lowest */
struct ieee80211_rate *rate; /* internal 80211.o rate */
struct ieee80211_rate *rts_rate; /* internal 80211.o rate
* for RTS/CTS */
int alt_retry_rate; /* retry rate for the last retries, given as the
* hw specific value for the rate (from
* struct ieee80211_rate). To be used to limit
* packet dropping when probing higher rates, if hw
* supports multiple retry rates. -1 = not used */
int type; /* internal */
};
/**
* 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_RADIOTAP: This frame starts with a radiotap header.
* @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/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_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_TSFT: The timestamp passed in the RX status (@mactime field)
* is valid.
*/
enum mac80211_rx_flags {
RX_FLAG_MMIC_ERROR = 1<<0,
RX_FLAG_DECRYPTED = 1<<1,
RX_FLAG_RADIOTAP = 1<<2,
RX_FLAG_MMIC_STRIPPED = 1<<3,
RX_FLAG_IV_STRIPPED = 1<<4,
RX_FLAG_FAILED_FCS_CRC = 1<<5,
RX_FLAG_FAILED_PLCP_CRC = 1<<6,
RX_FLAG_TSFT = 1<<7,
};
/**
* 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.
* @mactime: MAC timestamp as defined by 802.11
* @freq: frequency the radio was tuned to when receiving this frame, in MHz
* @channel: channel the radio was tuned to
* @phymode: active PHY mode
* @ssi: signal strength when receiving this frame
* @signal: used as 'qual' in statistics reporting
* @noise: PHY noise when receiving this frame
* @antenna: antenna used
* @rate: data rate
* @flag: %RX_FLAG_*
*/
struct ieee80211_rx_status {
u64 mactime;
int freq;
int channel;
enum ieee80211_phymode phymode;
int ssi;
int signal;
int noise;
int antenna;
int rate;
int flag;
};
/**
* enum ieee80211_tx_status_flags - transmit status flags
*
* Status flags to indicate various transmit conditions.
*
* @IEEE80211_TX_STATUS_TX_FILTERED: The frame was not transmitted
* because the destination STA was in powersave mode.
*
* @IEEE80211_TX_STATUS_ACK: Frame was acknowledged
*/
enum ieee80211_tx_status_flags {
IEEE80211_TX_STATUS_TX_FILTERED = 1<<0,
IEEE80211_TX_STATUS_ACK = 1<<1,
};
/**
* struct ieee80211_tx_status - transmit status
*
* As much information as possible should be provided for each transmitted
* frame with ieee80211_tx_status().
*
* @control: a copy of the &struct ieee80211_tx_control passed to the driver
* in the tx() callback.
*
* @flags: transmit status flags, defined above
*
* @ack_signal: signal strength of the ACK frame
*
* @excessive_retries: set to 1 if the frame was retried many times
* but not acknowledged
*
* @retry_count: number of retries
*
* @queue_length: ?? REMOVE
* @queue_number: ?? REMOVE
*/
struct ieee80211_tx_status {
struct ieee80211_tx_control control;
u8 flags;
bool excessive_retries;
u8 retry_count;
int ack_signal;
int queue_length;
int queue_number;
};
/**
* enum ieee80211_conf_flags - configuration flags
*
* Flags to define PHY configuration options
*
* @IEEE80211_CONF_SHORT_SLOT_TIME: use 802.11g short slot time
* @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported)
* @IEEE80211_CONF_SUPPORT_HT_MODE: use 802.11n HT capabilities (if supported)
*/
enum ieee80211_conf_flags {
IEEE80211_CONF_SHORT_SLOT_TIME = (1<<0),
IEEE80211_CONF_RADIOTAP = (1<<1),
IEEE80211_CONF_SUPPORT_HT_MODE = (1<<2),
};
/**
* struct ieee80211_conf - configuration of the device
*
* This struct indicates how the driver shall configure the hardware.
*
* @radio_enabled: when zero, driver is required to switch off the radio.
* TODO make a flag
* @channel: IEEE 802.11 channel number
* @freq: frequency in MHz
* @channel_val: hardware specific channel value for the channel
* @phymode: PHY mode to activate (REMOVE)
* @chan: channel to switch to, pointer to the channel information
* @mode: pointer to mode definition
* @regulatory_domain: ??
* @beacon_int: beacon interval (TODO make interface config)
* @flags: configuration flags defined above
* @power_level: transmit power limit for current regulatory domain in dBm
* @antenna_max: maximum antenna gain
* @antenna_sel_tx: transmit antenna selection, 0: default/diversity,
* 1/2: antenna 0/1
* @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx
* @ht_conf: describes current self configuration of 802.11n HT capabilies
* @ht_bss_conf: describes current BSS configuration of 802.11n HT parameters
*/
struct ieee80211_conf {
int channel; /* IEEE 802.11 channel number */
int freq; /* MHz */
int channel_val; /* hw specific value for the channel */
enum ieee80211_phymode phymode;
struct ieee80211_channel *chan;
struct ieee80211_hw_mode *mode;
unsigned int regulatory_domain;
int radio_enabled;
int beacon_int;
u32 flags;
u8 power_level;
u8 antenna_max;
u8 antenna_sel_tx;
u8 antenna_sel_rx;
struct ieee80211_ht_info ht_conf;
struct ieee80211_ht_bss_info ht_bss_conf;
};
/**
* enum ieee80211_if_types - types of 802.11 network interfaces
*
* @IEEE80211_IF_TYPE_INVALID: invalid interface type, not used
* by mac80211 itself
* @IEEE80211_IF_TYPE_AP: interface in AP mode.
* @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap
* daemon. Drivers should never see this type.
* @IEEE80211_IF_TYPE_STA: interface in STA (client) mode.
* @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode.
* @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode.
* @IEEE80211_IF_TYPE_WDS: interface in WDS mode.
* @IEEE80211_IF_TYPE_VLAN: VLAN interface bound to an AP, drivers
* will never see this type.
*/
enum ieee80211_if_types {
IEEE80211_IF_TYPE_INVALID,
IEEE80211_IF_TYPE_AP,
IEEE80211_IF_TYPE_STA,
IEEE80211_IF_TYPE_IBSS,
IEEE80211_IF_TYPE_MNTR,
IEEE80211_IF_TYPE_WDS,
IEEE80211_IF_TYPE_VLAN,
};
/**
* 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
* @drv_priv: data area for driver use, will always be aligned to
* sizeof(void *).
*/
struct ieee80211_vif {
enum ieee80211_if_types type;
/* must be last */
u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *))));
};
/**
* struct ieee80211_if_init_conf - initial configuration of an interface
*
* @vif: pointer to a driver-use per-interface structure. The pointer
* itself is also used for various functions including
* ieee80211_beacon_get() and ieee80211_get_buffered_bc().
* @type: one of &enum ieee80211_if_types constants. Determines the type of
* added/removed interface.
* @mac_addr: pointer to MAC address of the interface. This pointer is valid
* until the interface is removed (i.e. it cannot be used after
* remove_interface() callback was called for this interface).
*
* This structure is used in add_interface() and remove_interface()
* callbacks of &struct ieee80211_hw.
*
* When you allow multiple interfaces to be added to your PHY, take care
* that the hardware can actually handle multiple MAC addresses. However,
* also take care that when there's no interface left with mac_addr != %NULL
* you remove the MAC address from the device to avoid acknowledging packets
* in pure monitor mode.
*/
struct ieee80211_if_init_conf {
enum ieee80211_if_types type;
struct ieee80211_vif *vif;
void *mac_addr;
};
/**
* struct ieee80211_if_conf - configuration of an interface
*
* @type: type of the interface. This is always the same as was specified in
* &struct ieee80211_if_init_conf. The type of an interface never changes
* during the life of the interface; this field is present only for
* convenience.
* @bssid: BSSID of the network we are associated to/creating.
* @ssid: used (together with @ssid_len) by drivers for hardware that
* generate beacons independently. The pointer is valid only during the
* config_interface() call, so copy the value somewhere if you need
* it.
* @ssid_len: length of the @ssid field.
* @beacon: beacon template. Valid only if @host_gen_beacon_template in
* &struct ieee80211_hw is set. The driver is responsible of freeing
* the sk_buff.
* @beacon_control: tx_control for the beacon template, this field is only
* valid when the @beacon field was set.
*
* This structure is passed to the config_interface() callback of
* &struct ieee80211_hw.
*/
struct ieee80211_if_conf {
int type;
u8 *bssid;
u8 *ssid;
size_t ssid_len;
struct sk_buff *beacon;
struct ieee80211_tx_control *beacon_control;
};
/**
* enum ieee80211_key_alg - key algorithm
* @ALG_WEP: WEP40 or WEP104
* @ALG_TKIP: TKIP
* @ALG_CCMP: CCMP (AES)
*/
enum ieee80211_key_alg {
ALG_WEP,
ALG_TKIP,
ALG_CCMP,
};
/**
* 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_WMM_STA: Set by mac80211, this flag indicates
* that the STA this key will be used with could be using QoS.
* @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the
* driver to indicate that it requires IV generation for this
* particular key.
* @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.
*/
enum ieee80211_key_flags {
IEEE80211_KEY_FLAG_WMM_STA = 1<<0,
IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1,
IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2,
};
/**
* 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.
* @alg: The key algorithm.
* @flags: key flags, see &enum ieee80211_key_flags.
* @keyidx: the key index (0-3)
* @keylen: key material length
* @key: key material
*/
struct ieee80211_key_conf {
enum ieee80211_key_alg alg;
u8 hw_key_idx;
u8 flags;
s8 keyidx;
u8 keylen;
u8 key[0];
};
/**
* enum set_key_cmd - key command
*
* Used with the set_key() callback in &struct ieee80211_ops, this
* indicates whether a key is being removed or added.
*
* @SET_KEY: a key is set
* @DISABLE_KEY: a key must be disabled
*/
enum set_key_cmd {
SET_KEY, DISABLE_KEY,
};
/**
* enum sta_notify_cmd - sta notify command
*
* Used with the sta_notify() callback in &struct ieee80211_ops, this
* indicates addition and removal of a station to station table
*
* @STA_NOTIFY_ADD: a station was added to the station table
* @STA_NOTIFY_REMOVE: a station being removed from the station table
*/
enum sta_notify_cmd {
STA_NOTIFY_ADD, STA_NOTIFY_REMOVE
};
/**
* enum ieee80211_hw_flags - hardware flags
*
* These flags are used to indicate hardware capabilities to
* the stack. Generally, flags here should have their meaning
* done in a way that the simplest hardware doesn't need setting
* any particular flags. There are some exceptions to this rule,
* however, so you are advised to review these flags carefully.
*
* @IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE:
* The device only needs to be supplied with a beacon template.
* If you need the host to generate each beacon then don't use
* this flag and call ieee80211_beacon_get() when you need the
* next beacon frame. Note that if you set this flag, you must
* implement the set_tim() callback for powersave mode to work
* properly.
* This flag is only relevant for access-point mode.
*
* @IEEE80211_HW_RX_INCLUDES_FCS:
* Indicates that received frames passed to the stack include
* the FCS at the end.
*
* @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING:
* Some wireless LAN chipsets buffer broadcast/multicast frames
* for power saving stations in the hardware/firmware and others
* rely on the host system for such buffering. This option is used
* to configure the IEEE 802.11 upper layer to buffer broadcast and
* multicast frames when there are power saving stations so that
* the driver can fetch them with ieee80211_get_buffered_bc(). Note
* that not setting this flag works properly only when the
* %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is also not set because
* otherwise the stack will not know when the DTIM beacon was sent.
*
* @IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED:
* Channels are already configured to the default regulatory domain
* specified in the device's EEPROM
*/
enum ieee80211_hw_flags {
IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE = 1<<0,
IEEE80211_HW_RX_INCLUDES_FCS = 1<<1,
IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2,
IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED = 1<<3,
};
/**
* struct ieee80211_hw - hardware information and state
*
* This structure contains the configuration and hardware
* information for an 802.11 PHY.
*
* @wiphy: This points to the &struct wiphy allocated for this
* 802.11 PHY. You must fill in the @perm_addr and @dev
* members of this structure using SET_IEEE80211_DEV()
* and SET_IEEE80211_PERM_ADDR().
*
* @conf: &struct ieee80211_conf, device configuration, don't use.
*
* @workqueue: single threaded workqueue available for driver use,
* allocated by mac80211 on registration and flushed on
* unregistration.
*
* @priv: pointer to private area that was allocated for driver use
* along with this structure.
*
* @flags: hardware flags, see &enum ieee80211_hw_flags.
*
* @extra_tx_headroom: headroom to reserve in each transmit skb
* for use by the driver (e.g. for transmit headers.)
*
* @channel_change_time: time (in microseconds) it takes to change channels.
*
* @max_rssi: Maximum value for ssi in RX information, use
* negative numbers for dBm and 0 to indicate no support.
*
* @max_signal: like @max_rssi, but for the signal value.
*
* @max_noise: like @max_rssi, but for the noise value.
*
* @queues: number of available hardware transmit queues for
* data packets. WMM/QoS requires at least four.
*
* @rate_control_algorithm: rate control algorithm for this hardware.
* If unset (NULL), the default algorithm will be used. Must be
* set before calling ieee80211_register_hw().
*
* @vif_data_size: size (in bytes) of the drv_priv data area
* within &struct ieee80211_vif.
*/
struct ieee80211_hw {
struct ieee80211_conf conf;
struct wiphy *wiphy;
struct workqueue_struct *workqueue;
const char *rate_control_algorithm;
void *priv;
u32 flags;
unsigned int extra_tx_headroom;
int channel_change_time;
int vif_data_size;
u8 queues;
s8 max_rssi;
s8 max_signal;
s8 max_noise;
};
/**
* SET_IEEE80211_DEV - set device for 802.11 hardware
*
* @hw: the &struct ieee80211_hw to set the device for
* @dev: the &struct device of this 802.11 device
*/
static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev)
{
set_wiphy_dev(hw->wiphy, dev);
}
/**
* SET_IEEE80211_PERM_ADDR - set the permanenet MAC address for 802.11 hardware
*
* @hw: the &struct ieee80211_hw to set the MAC address for
* @addr: the address to set
*/
static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr)
{
memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN);
}
/**
* DOC: Hardware crypto acceleration
*
* mac80211 is capable of taking advantage of many hardware
* acceleration designs for encryption and decryption operations.
*
* The set_key() callback in the &struct ieee80211_ops for a given
* device is called to enable hardware acceleration of encryption and
* decryption. The callback takes an @address parameter that will be
* the broadcast address for default keys, the other station's hardware
* address for individual keys or the zero address for keys that will
* be used only for transmission.
* Multiple transmission keys with the same key index may be used when
* VLANs are configured for an access point.
*
* The @local_address parameter will always be set to our own address,
* this is only relevant if you support multiple local addresses.
*
* When transmitting, the TX control data will use the @hw_key_idx
* selected by the driver by modifying the &struct ieee80211_key_conf
* pointed to by the @key parameter to the set_key() function.
*
* The set_key() call for the %SET_KEY command should return 0 if
* the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be
* added; if you return 0 then hw_key_idx must be assigned to the
* hardware key index, you are free to use the full u8 range.
*
* When the cmd is %DISABLE_KEY then it must succeed.
*
* Note that it is permissible to not decrypt a frame even if a key
* for it has been uploaded to hardware, the stack will not make any
* decision based on whether a key has been uploaded or not but rather
* based on the receive flags.
*
* The &struct ieee80211_key_conf structure pointed to by the @key
* parameter is guaranteed to be valid until another call to set_key()
* removes it, but it can only be used as a cookie to differentiate
* keys.
*/
/**
* DOC: Frame filtering
*
* mac80211 requires to see many management frames for proper
* operation, and users may want to see many more frames when
* in monitor mode. However, for best CPU usage and power consumption,
* having as few frames as possible percolate through the stack is
* desirable. Hence, the hardware should filter as much as possible.
*
* To achieve this, mac80211 uses filter flags (see below) to tell
* the driver's configure_filter() function which frames should be
* passed to mac80211 and which should be filtered out.
*
* The configure_filter() callback is invoked with the parameters
* @mc_count and @mc_list for the combined multicast address list
* of all virtual interfaces, @changed_flags telling which flags
* were changed and @total_flags with the new flag states.
*
* If your device has no multicast address filters your driver will
* need to check both the %FIF_ALLMULTI flag and the @mc_count
* parameter to see whether multicast frames should be accepted
* or dropped.
*
* All unsupported flags in @total_flags must be cleared, i.e. you
* should clear all bits except those you honoured.
*/
/**
* enum ieee80211_filter_flags - hardware filter flags
*
* These flags determine what the filter in hardware should be
* programmed to let through and what should not be passed to the
* stack. It is always safe to pass more frames than requested,
* but this has negative impact on power consumption.
*
* @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS,
* think of the BSS as your network segment and then this corresponds
* to the regular ethernet device promiscuous mode.
*
* @FIF_ALLMULTI: pass all multicast frames, this is used if requested
* by the user or if the hardware is not capable of filtering by
* multicast address.
*
* @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the
* %RX_FLAG_FAILED_FCS_CRC for them)
*
* @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set
* the %RX_FLAG_FAILED_PLCP_CRC for them
*
* @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate
* to the hardware that it should not filter beacons or probe responses
* by BSSID. Filtering them can greatly reduce the amount of processing
* mac80211 needs to do and the amount of CPU wakeups, so you should
* honour this flag if possible.
*
* @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then
* only those addressed to this station
*
* @FIF_OTHER_BSS: pass frames destined to other BSSes
*/
enum ieee80211_filter_flags {
FIF_PROMISC_IN_BSS = 1<<0,
FIF_ALLMULTI = 1<<1,
FIF_FCSFAIL = 1<<2,
FIF_PLCPFAIL = 1<<3,
FIF_BCN_PRBRESP_PROMISC = 1<<4,
FIF_CONTROL = 1<<5,
FIF_OTHER_BSS = 1<<6,
};
/**
* enum ieee80211_ampdu_mlme_action - A-MPDU actions
*
* These flags are used with the ampdu_action() callback in
* &struct ieee80211_ops to indicate which action is needed.
* @IEEE80211_AMPDU_RX_START: start Rx aggregation
* @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation
*/
enum ieee80211_ampdu_mlme_action {
IEEE80211_AMPDU_RX_START,
IEEE80211_AMPDU_RX_STOP,
};
/**
* struct ieee80211_ops - callbacks from mac80211 to the driver
*
* This structure contains various callbacks that the driver may
* handle or, in some cases, must handle, for example to configure
* the hardware to a new channel or to transmit a frame.
*
* @tx: Handler that 802.11 module calls for each transmitted frame.
* skb contains the buffer starting from the IEEE 802.11 header.
* The low-level driver should send the frame out based on
* configuration in the TX control data. Must be implemented and
* atomic.
*
* @start: Called before the first netdevice attached to the hardware
* is enabled. This should turn on the hardware and must turn on
* frame reception (for possibly enabled monitor interfaces.)
* Returns negative error codes, these may be seen in userspace,
* or zero.
* When the device is started it should not have a MAC address
* to avoid acknowledging frames before a non-monitor device
* is added.
* Must be implemented.
*
* @stop: Called after last netdevice attached to the hardware
* is disabled. This should turn off the hardware (at least