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/*
* mac80211 <-> driver interface
*
* Copyright 2002-2005, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
*
* 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_hw_mode - PHY mode definition
*
* This structure describes the capabilities supported by the device
* in a single PHY mode.
*
* @mode: the PHY mode for this definition
* @num_channels: number of supported channels
* @channels: pointer to array of supported channels
* @num_rates: number of supported bitrates
* @rates: pointer to array of supported bitrates
* @list: internal
*/
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_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;
};
/* 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 {
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 */
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 */
int ifindex; /* 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.
*/
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,
};
/**
* 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)
*
*/
enum ieee80211_conf_flags {
IEEE80211_CONF_SHORT_SLOT_TIME = 1<<0,
IEEE80211_CONF_RADIOTAP = 1<<1,
};
/**
* 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
*/
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;
};
/**
* 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_if_init_conf - initial configuration of an interface
*
* @if_id: internal interface ID. This number has no particular meaning to
* drivers and the only allowed usage is to pass it to
* ieee80211_beacon_get() and ieee80211_get_buffered_bc() functions.
* This field is not valid for monitor interfaces
* (interfaces of %IEEE80211_IF_TYPE_MNTR type).
* @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 {
int if_id;
enum ieee80211_if_types type;
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];
};
#define IEEE80211_SEQ_COUNTER_RX 0
#define IEEE80211_SEQ_COUNTER_TX 1
/**
* 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().
*/
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;
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_erp_change_flags - erp change flags
*
* These flags are used with the erp_ie_changed() callback in
* &struct ieee80211_ops to indicate which parameter(s) changed.
* @IEEE80211_ERP_CHANGE_PROTECTION: protection changed
* @IEEE80211_ERP_CHANGE_PREAMBLE: barker preamble mode changed
*/
enum ieee80211_erp_change_flags {
IEEE80211_ERP_CHANGE_PROTECTION = 1<<0,
IEEE80211_ERP_CHANGE_PREAMBLE = 1<<1,
};
/**
* 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
* it must turn off frame reception.)
* May be called right after add_interface if that rejects
* an interface.
* Must be implemented.
*
* @add_interface: Called when a netdevice attached to the hardware is
* enabled. Because it is not called for monitor mode devices, @open
* and @stop must be implemented.
* The driver should perform any initialization it needs before
* the device can be enabled. The initial configuration for the
* interface is given in the conf parameter.
* The callback may refuse to add an interface by returning a
* negative error code (which will be seen in userspace.)
* Must be implemented.
*
* @remove_interface: Notifies a driver that an interface is going down.
* The @stop callback is called after this if it is the last interface
* and no monitor interfaces are present.
* When all interfaces are removed, the MAC address in the hardware
* must be cleared so the device no longer acknowledges packets,
* the mac_addr member of the conf structure is, however, set to the
* MAC address of the device going away.
* Hence, this callback must be implemented.
*
* @config: Handler for configuration requests. IEEE 802.11 code calls this
* function to change hardware configuration, e.g., channel.
*
* @config_interface: Handler for configuration requests related to interfaces
* (e.g. BSSID changes.)
*
* @configure_filter: Configure the device's RX filter.
* See the section "Frame filtering" for more information.
* This callback must be implemented and atomic.
*
* @set_tim: Set TIM bit. If the hardware/firmware takes care of beacon
* generation (that is, %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is set)
* mac80211 calls this function when a TIM bit must be set or cleared
* for a given AID. Must be atomic.
*
* @set_key: See the section "Hardware crypto acceleration"
* This callback can sleep, and is only called between add_interface
* and remove_interface calls, i.e. while the interface with the
* given local_address is enabled.
*
* @hw_scan: Ask the hardware to service the scan request, no need to start
* the scan state machine in stack.
*
* @get_stats: return low-level statistics
*
* @get_sequence_counter: For devices that have internal sequence counters this
* callback allows mac80211 to access the current value of a counter.
* This callback seems not well-defined, tell us if you need it.
*
* @set_rts_threshold: Configuration of RTS threshold (if device needs it)
*
* @set_frag_threshold: Configuration of fragmentation threshold. Assign this if
* the device does fragmentation by itself; if this method is assigned then
* the stack will not do fragmentation.
*
* @set_retry_limit: Configuration of retry limits (if device needs it)
*
* @sta_notify: Notifies low level driver about addition or removal
* of assocaited station or AP.
*
* @erp_ie_changed: Handle ERP IE change notifications. Must be atomic.
*
* @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
* bursting) for a hardware TX queue. The @queue parameter uses the
* %IEEE80211_TX_QUEUE_* constants. Must be atomic.
*
* @get_tx_stats: Get statistics of the current TX queue status. This is used
* to get number of currently queued packets (queue length), maximum queue
* size (limit), and total number of packets sent using each TX queue
* (count). This information is used for WMM to find out which TX
* queues have room for more packets and by hostapd to provide
* statistics about the current queueing state to external programs.
*
* @get_tsf: Get the current TSF timer value from firmware/hardware. Currently,
* this is only used for IBSS mode debugging and, as such, is not a
* required function. Must be atomic.
*
* @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize
* with other STAs in the IBSS. This is only used in IBSS mode. This
* function is optional if the firmware/hardware takes full care of
* TSF synchronization.
*
* @beacon_update: Setup beacon data for IBSS beacons. Unlike access point,
* IBSS uses a fixed beacon frame which is configured using this
* function.
* If the driver returns success (0) from this callback, it owns
* the skb. That means the driver is responsible to kfree_skb() it.
* The control structure is not dynamically allocated. That means the
* driver does not own the pointer and if it needs it somewhere
* outside of the context of this function, it must copy it
* somewhere else.
* This handler is required only for IBSS mode.
*
* @tx_last_beacon: Determine whether the last IBSS beacon was sent by us.
* This is needed only for IBSS mode and the result of this function is
* used to determine whether to reply to Probe Requests.
*/
struct ieee80211_ops {
int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb,
struct ieee80211_tx_control *control);
int (*start)(struct ieee80211_hw *hw);
void (*stop)(struct ieee80211_hw *hw);
int (*add_interface)(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf);
void (*remove_interface)(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf);
int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
int (*config_interface)(struct ieee80211_hw *hw,
int if_id, struct ieee80211_if_conf *conf);
void (*configure_filter)(struct ieee80211_hw *hw,
unsigned int changed_flags,
unsigned int *total_flags,
int mc_count, struct dev_addr_list *mc_list);
int (*set_tim)(struct ieee80211_hw *hw, int aid, int set);
int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd,
const u8 *local_address, const u8 *address,
struct ieee80211_key_conf *key);
int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len);
int (*get_stats)(struct ieee80211_hw *hw,
struct ieee80211_low_level_stats *stats);
int (*get_sequence_counter)(struct ieee80211_hw *hw,
u8* addr, u8 keyidx, u8 txrx,
u32* iv32, u16* iv16);
int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value);
int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value);
int (*set_retry_limit)(struct ieee80211_hw *hw,
u32 short_retry, u32 long_retr);
void (*sta_notify)(struct ieee80211_hw *hw, int if_id,
enum sta_notify_cmd, const u8 *addr);
void (*erp_ie_changed)(struct ieee80211_hw *hw, u8 changes,
int cts_protection, int preamble);
int (*conf_tx)(struct ieee80211_hw *hw, int queue,
const struct ieee80211_tx_queue_params *params);
int (*get_tx_stats)(struct ieee80211_hw *hw,
struct ieee80211_tx_queue_stats *stats);
u64 (*get_tsf)(struct ieee80211_hw *hw);
void (*reset_tsf)(struct ieee80211_hw *hw);
int (*beacon_update)(struct ieee80211_hw *hw,
struct sk_buff *skb,
struct ieee80211_tx_control *control);
int (*tx_last_beacon)(struct ieee80211_hw *hw);
};
/**
* ieee80211_alloc_hw - Allocate a new hardware device
*
* This must be called once for each hardware device. The returned pointer
* must be used to refer to this device when calling other functions.
* mac80211 allocates a private data area for the driver pointed to by
* @priv in &struct ieee80211_hw, the size of this area is given as
* @priv_data_len.
*
* @priv_data_len: length of private data
* @ops: callbacks for this device
*/
struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
const struct ieee80211_ops *ops);
/**
* ieee80211_register_hw - Register hardware device
*
* You must call this function before any other functions
* except ieee80211_register_hwmode.
*
* @hw: the device to register as returned by ieee80211_alloc_hw()
*/
int ieee80211_register_hw(struct ieee80211_hw *hw);
#ifdef CONFIG_MAC80211_LEDS
extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw);
extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw);
extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw);
#endif
/**
* ieee80211_get_tx_led_name - get name of TX LED
*
* mac80211 creates a transmit LED trigger for each wireless hardware
* that can be used to drive LEDs if your driver registers a LED device.
* This function returns the name (or %NULL if not configured for LEDs)
* of the trigger so you can automatically link the LED device.
*
* @hw: the hardware to get the LED trigger name for
*/
static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw)
{
#ifdef CONFIG_MAC80211_LEDS
return __ieee80211_get_tx_led_name(hw);
#else
return NULL;
#endif
}
/**
* ieee80211_get_rx_led_name - get name of RX LED
*
* mac80211 creates a receive LED trigger for each wireless hardware
* that can be used to drive LEDs if your driver registers a LED device.
* This function returns the name (or %NULL if not configured for LEDs)
* of the trigger so you can automatically link the LED device.
*
* @hw: the hardware to get the LED trigger name for
*/
static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw)
{
#ifdef CONFIG_MAC80211_LEDS
return __ieee80211_get_rx_led_name(hw);
#else
return NULL;
#endif
}
static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw)
{
#ifdef CONFIG_MAC80211_LEDS
return __ieee80211_get_assoc_led_name(hw);
#else
return NULL;
#endif
}
/* Register a new hardware PHYMODE capability to the stack. */
int ieee80211_register_hwmode(struct ieee80211_hw *hw,
struct ieee80211_hw_mode *mode);
/**
* ieee80211_unregister_hw - Unregister a hardware device
*
* This function instructs mac80211 to free allocated resources
* and unregister netdevices from the networking subsystem.
*
* @hw: the hardware to unregister
*/
void ieee80211_unregister_hw(struct ieee80211_hw *hw);
/**
* ieee80211_free_hw - free hardware descriptor
*
* This function frees everything that was allocated, including the
* private data for the driver. You must call ieee80211_unregister_hw()
* before calling this function
*
* @hw: the hardware to free
*/
void ieee80211_free_hw(struct ieee80211_hw *hw);
/* trick to avoid symbol clashes with the ieee80211 subsystem */
void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
struct ieee80211_rx_status *status);
/**
* ieee80211_rx - receive frame
*
* Use this function to hand received frames to mac80211. The receive
* buffer in @skb must start with an IEEE 802.11 header or a radiotap
* header if %RX_FLAG_RADIOTAP is set in the @status flags.
*
* This function may not be called in IRQ context.
*
* @hw: the hardware this frame came in on
* @skb: the buffer to receive, owned by mac80211 after this call
* @status: status of this frame; the status pointer need not be valid
* after this function returns
*/
static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
struct ieee80211_rx_status *status)
{
__ieee80211_rx(hw, skb, status);
}
/**
* ieee80211_rx_irqsafe - receive frame
*
* Like ieee80211_rx() but can be called in IRQ context
* (internally defers to a workqueue.)
*
* @hw: the hardware this frame came in on
* @skb: the buffer to receive, owned by mac80211 after this call
* @status: status of this frame; the status pointer need not be valid
* after this function returns and is not freed by mac80211,
* it is recommended that it points to a stack area
*/
void ieee80211_rx_irqsafe(struct ieee80211_hw *hw,
struct sk_buff *skb,
struct ieee80211_rx_status *status);
/**
* ieee80211_tx_status - transmit status callback
*
* Call this function for all transmitted frames after they have been
* transmitted. It is permissible to not call this function for
* multicast frames but this can affect statistics.
*
* @hw: the hardware the frame was transmitted by
* @skb: the frame that was transmitted, owned by mac80211 after this call
* @status: status information for this frame; the status pointer need not
* be valid after this function returns and is not freed by mac80211,
* it is recommended that it points to a stack area
*/
void ieee80211_tx_status(struct ieee80211_hw *hw,
struct sk_buff *skb,
struct ieee80211_tx_status *status);
void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
struct sk_buff *skb,
struct ieee80211_tx_status *status);
/**
* ieee80211_beacon_get - beacon generation function
* @hw: pointer obtained from ieee80211_alloc_hw().
* @if_id: interface ID from &struct ieee80211_if_init_conf.
* @control: will be filled with information needed to send this beacon.
*
* If the beacon frames are generated by the host system (i.e., not in
* hardware/firmware), the low-level driver uses this function to receive
* the next beacon frame from the 802.11 code. The low-level is responsible
* for calling this function before beacon data is needed (e.g., based on
* hardware interrupt). Returned skb is used only once and low-level driver
* is responsible of freeing it.
*/
struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
int if_id,
struct ieee80211_tx_control *control);
/**
* ieee80211_rts_get - RTS frame generation function
* @hw: pointer obtained from ieee80211_alloc_hw().
* @if_id: interface ID from &struct ieee80211_if_init_conf.
* @frame: pointer to the frame that is going to be protected by the RTS.
* @frame_len: the frame length (in octets).
* @frame_txctl: &struct ieee80211_tx_control of the frame.
* @rts: The buffer where to store the RTS frame.
*
* If the RTS frames are generated by the host system (i.e., not in
* hardware/firmware), the low-level driver uses this function to receive
* the next RTS frame from the 802.11 code. The low-level is responsible
* for calling this function before and RTS frame is needed.
*/
void ieee80211_rts_get(struct ieee80211_hw *hw, int if_id,
const void *frame, size_t frame_len,
const struct ieee80211_tx_control *frame_txctl,
struct ieee80211_rts *rts);
/**
* ieee80211_rts_duration - Get the duration field for an RTS frame
* @hw: pointer obtained from ieee80211_alloc_hw().
* @if_id: interface ID from &struct ieee80211_if_init_conf.
* @frame_len: the length of the frame that is going to be protected by the RTS.
* @frame_txctl: &struct ieee80211_tx_control of the frame.
*
* If the RTS is generated in firmware, but the host system must provide
* the duration field, the low-level driver uses this function to receive
* the duration field value in little-endian byteorder.
*/
__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, int if_id,
size_t frame_len,
const struct ieee80211_tx_control *frame_txctl);
/**
* ieee80211_ctstoself_get - CTS-to-self frame generation function
* @hw: pointer obtained from ieee80211_alloc_hw().
* @if_id: interface ID from &struct ieee80211_if_init_conf.
* @frame: pointer to the frame that is going to be protected by the CTS-to-self.
* @frame_len: the frame length (in octets).
* @frame_txctl: &struct ieee80211_tx_control of the frame.
* @cts: The buffer where to store the CTS-to-self frame.
*
* If the CTS-to-self frames are generated by the host system (i.e., not in
* hardware/firmware), the low-level driver uses this function to receive
* the next CTS-to-self frame from the 802.11 code. The low-level is responsible
* for calling this function before and CTS-to-self frame is needed.
*/
void ieee80211_ctstoself_get(struct ieee80211_hw *hw, int if_id,
const void *frame, size_t frame_len,
const struct ieee80211_tx_control *frame_txctl,
struct ieee80211_cts *cts);
/**
* ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame
* @hw: pointer obtained from ieee80211_alloc_hw().
* @if_id: interface ID from &struct ieee80211_if_init_conf.
* @frame_len: the length of the frame that is going to be protected by the CTS-to-self.
* @frame_txctl: &struct ieee80211_tx_control of the frame.
*
* If the CTS-to-self is generated in firmware, but the host system must provide
* the duration field, the low-level driver uses this function to receive
* the duration field value in little-endian byteorder.
*/
__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, int if_id,
size_t frame_len,
const struct ieee80211_tx_control *frame_txctl);
/**
* ieee80211_generic_frame_duration - Calculate the duration field for a frame
* @hw: pointer obtained from ieee80211_alloc_hw().
* @if_id: interface ID from &struct ieee80211_if_init_conf.
* @frame_len: the length of the frame.
* @rate: the rate (in 100kbps) at which the frame is going to be transmitted.
*
* Calculate the duration field of some generic frame, given its
* length and transmission rate (in 100kbps).
*/
__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, int if_id,
size_t frame_len,
int rate);
/**
* ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames
* @hw: pointer as obtained from ieee80211_alloc_hw().
* @if_id: interface ID from &struct ieee80211_if_init_conf.
* @control: will be filled with information needed to send returned frame.
*
* Function for accessing buffered broadcast and multicast frames. If
* hardware/firmware does not implement buffering of broadcast/multicast
* frames when power saving is used, 802.11 code buffers them in the host
* memory. The low-level driver uses this function to fetch next buffered
* frame. In most cases, this is used when generating beacon frame. This
* function returns a pointer to the next buffered skb or NULL if no more
* buffered frames are available.
*
* Note: buffered frames are returned only after DTIM beacon frame was
* generated with ieee80211_beacon_get() and the low-level driver must thus
* call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns
* NULL if the previous generated beacon was not DTIM, so the low-level driver
* does not need to check for DTIM beacons separately and should be able to
* use common code for all beacons.
*/
struct sk_buff *
ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id,
struct ieee80211_tx_control *control);
/**
* ieee80211_get_hdrlen_from_skb - get header length from data
*
* Given an skb with a raw 802.11 header at the data pointer this function
* returns the 802.11 header length in bytes (not including encryption
* headers). If the data in the sk_buff is too short to contain a valid 802.11
* header the function returns 0.
*
* @skb: the frame
*/
int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb);
/**
* ieee80211_get_hdrlen - get header length from frame control
*
* This function returns the 802.11 header length in bytes (not including
* encryption headers.)
*
* @fc: the frame control field (in CPU endianness)
*/
int ieee80211_get_hdrlen(u16 fc);
/**
* ieee80211_wake_queue - wake specific queue
* @hw: pointer as obtained from ieee80211_alloc_hw().
* @queue: queue number (counted from zero).
*
* Drivers should use this function instead of netif_wake_queue.
*/
void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue);
/**
* ieee80211_stop_queue - stop specific queue
* @hw: pointer as obtained from ieee80211_alloc_hw().
* @queue: queue number (counted from zero).
*
* Drivers should use this function instead of netif_stop_queue.
*/
void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue);
/**
* ieee80211_start_queues - start all queues
* @hw: pointer to as obtained from ieee80211_alloc_hw().
*
* Drivers should use this function instead of netif_start_queue.
*/
void ieee80211_start_queues(struct ieee80211_hw *hw);
/**
* ieee80211_stop_queues - stop all queues
* @hw: pointer as obtained from ieee80211_alloc_hw().
*
* Drivers should use this function instead of netif_stop_queue.
*/
void ieee80211_stop_queues(struct ieee80211_hw *hw);
/**
* ieee80211_wake_queues - wake all queues
* @hw: pointer as obtained from ieee80211_alloc_hw().
*
* Drivers should use this function instead of netif_wake_queue.
*/
void ieee80211_wake_queues(struct ieee80211_hw *hw);
/**
* ieee80211_scan_completed - completed hardware scan
*
* When hardware scan offload is used (i.e. the hw_scan() callback is
* assigned) this function needs to be called by the driver to notify
* mac80211 that the scan finished.
*
* @hw: the hardware that finished the scan
*/
void ieee80211_scan_completed(struct ieee80211_hw *hw);
#endif /* MAC80211_H */
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