mac80211.h 44 KB
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/*
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 * mac80211 <-> driver interface
 *
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 * Copyright 2002-2005, Devicescape Software, Inc.
 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
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 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
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 *
 * 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>

/* Note! 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 tasklet (in
 * software interrupt context).
 */

/*
 * Frame format used when passing frame between low-level hardware drivers
 * and IEEE 802.11 driver the same as used in the wireless media, i.e.,
 * buffers start with IEEE 802.11 header and include the same octets that
 * are sent over air.
 *
 * If hardware uses IEEE 802.3 headers (and perform 802.3 <-> 802.11
 * conversion in firmware), upper layer 802.11 code needs to be changed to
 * support this.
 *
 * If the receive frame format is not the same as the real frame sent
 * on the wireless media (e.g., due to padding etc.), upper layer 802.11 code
 * could be updated to provide support for such format assuming this would
 * optimize the performance, e.g., by removing need to re-allocation and
 * copying of the data.
 */

#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))

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/* Low-level driver should set PREAMBLE2, OFDM and CCK flags.
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 * 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 */
};

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/**
 * 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
 */
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enum ieee80211_phymode {
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	MODE_IEEE80211A,
	MODE_IEEE80211B,
	MODE_IEEE80211G,
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	/* keep last */
	NUM_IEEE80211_MODES
};

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/**
 * 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
 */
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struct ieee80211_hw_mode {
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	struct list_head list;
	struct ieee80211_channel *channels;
	struct ieee80211_rate *rates;
	enum ieee80211_phymode mode;
	int num_channels;
	int num_rates;
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};

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/**
 * 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
 */
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struct ieee80211_tx_queue_params {
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	int aifs;
	int cw_min;
	int cw_max;
	int burst_time;
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};

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/**
 * struct ieee80211_tx_queue_stats_data - transmit queue statistics
 *
 * @len: number of packets in queue
 * @limit: queue length limit
 * @count: number of frames sent
 */
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struct ieee80211_tx_queue_stats_data {
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	unsigned int len;
	unsigned int limit;
	unsigned int count;
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};

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/**
 * 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 {
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	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 */
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#define IEEE80211_TXCTL_LONG_RETRY_LIMIT (1<<10) /* this frame should be send
						  * using the through
						  * set_retry_limit configured
						  * long retry value */
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	u32 flags;			       /* tx control flags defined
						* above */
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	u8 key_idx;		/* keyidx from hw->set_key(), undefined if
				 * IEEE80211_TXCTL_DO_NOT_ENCRYPT is set */
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	u8 retry_limit;		/* 1 = only first attempt, 2 = one retry, ..
				 * This could be used when set_retry_limit
				 * is not implemented by the driver */
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	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 */
};

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/**
 * 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.
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 * @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.
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 */
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,
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	RX_FLAG_FAILED_FCS_CRC	= 1<<5,
	RX_FLAG_FAILED_PLCP_CRC = 1<<6,
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};

/**
 * 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_*
 */
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struct ieee80211_rx_status {
	u64 mactime;
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	int freq;
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	int channel;
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	enum ieee80211_phymode phymode;
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	int ssi;
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	int signal;
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	int noise;
	int antenna;
	int rate;
	int flag;
};

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/**
 * 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
 */
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struct ieee80211_tx_status {
	struct ieee80211_tx_control control;
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	u8 flags;
	bool excessive_retries;
	u8 retry_count;
	int ack_signal;
	int queue_length;
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	int queue_number;
};

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/**
 * 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,
};
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/**
 * 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.
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 *	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
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 */
struct ieee80211_conf {
	int channel;			/* IEEE 802.11 channel number */
	int freq;			/* MHz */
	int channel_val;		/* hw specific value for the channel */

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	enum ieee80211_phymode phymode;
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	struct ieee80211_channel *chan;
	struct ieee80211_hw_mode *mode;
	unsigned int regulatory_domain;
	int radio_enabled;

	int beacon_int;
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	u32 flags;
	u8 power_level;
	u8 antenna_max;
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	u8 antenna_sel_tx;
	u8 antenna_sel_rx;
};

/**
 * enum ieee80211_if_types - types of 802.11 network interfaces
 *
 * @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.
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 * @IEEE80211_IF_TYPE_VLAN: VLAN interface bound to an AP, drivers
 *	will never see this type.
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 */
enum ieee80211_if_types {
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	IEEE80211_IF_TYPE_AP,
	IEEE80211_IF_TYPE_MGMT,
	IEEE80211_IF_TYPE_STA,
	IEEE80211_IF_TYPE_IBSS,
	IEEE80211_IF_TYPE_MNTR,
	IEEE80211_IF_TYPE_WDS,
	IEEE80211_IF_TYPE_VLAN,
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};

/**
 * 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.
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 *
 * 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.
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 */
struct ieee80211_if_init_conf {
	int if_id;
	int 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.
 * @generic_elem: used (together with @generic_elem_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.
 * @generic_elem_len: length of the generic element.
 * @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;
	u8 *generic_elem;
	size_t generic_elem_len;
	struct sk_buff *beacon;
	struct ieee80211_tx_control *beacon_control;
};

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/**
 * enum ieee80211_key_alg - key algorithm
 * @ALG_NONE: Unset key algorithm, will never be passed to the driver
 * @ALG_WEP: WEP40 or WEP104
 * @ALG_TKIP: TKIP
 * @ALG_CCMP: CCMP (AES)
 */
typedef enum ieee80211_key_alg {
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	ALG_NONE,
	ALG_WEP,
	ALG_TKIP,
	ALG_CCMP,
} ieee80211_key_alg;
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/**
 * 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.
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 */
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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,
};
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/**
 * 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
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 *	encrypted in hardware.
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 * @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
 */
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struct ieee80211_key_conf {
	ieee80211_key_alg alg;
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	u8 hw_key_idx;
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	u8 flags;
	s8 keyidx;
	u8 keylen;
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	u8 key[0];
};

#define IEEE80211_SEQ_COUNTER_RX	0
#define IEEE80211_SEQ_COUNTER_TX	1

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/**
 * 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
 */
typedef enum set_key_cmd {
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	SET_KEY, DISABLE_KEY,
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} set_key_cmd;

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/**
 * struct ieee80211_hw - hardware information and state
 * TODO: move documentation into kernel-doc format
 */
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struct ieee80211_hw {
	/* points to the cfg80211 wiphy for this piece. Note
	 * that you must fill in the perm_addr and dev fields
	 * of this structure, use the macros provided below. */
	struct wiphy *wiphy;

	/* assigned by mac80211, don't write */
	struct ieee80211_conf conf;

	/* Single thread workqueue available for driver use
	 * Allocated by mac80211 on registration */
	struct workqueue_struct *workqueue;

	/* Pointer to the private area that was
	 * allocated with this struct for you. */
	void *priv;

	/* The rest is information about your hardware */

	/* TODO: frame_type 802.11/802.3, sw_encryption requirements */

626 627 628 629 630 631 632
/* hole at 0 */

	/*
	 * 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 use ieee80211_beacon_get().
	 */
633 634
#define IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE (1<<1)

635
/* hole at 2 */
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	/* Whether RX frames passed to ieee80211_rx() include FCS in the end */
#define IEEE80211_HW_RX_INCLUDES_FCS (1<<3)

	/* 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/multicast
	 * frames when there are power saving stations so that low-level driver
	 * can fetch them with ieee80211_get_buffered_bc(). */
#define IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING (1<<4)

648
/* hole at 5 */
649

650
/* hole at 6 */
651

652
/* hole at 7 */
653

654
/* hole at 8 */
655

656
/* hole at 9 */
657

658
/* hole at 10 */
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	/* Channels are already configured to the default regulatory domain
	 * specified in the device's EEPROM */
#define IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED (1<<11)

	u32 flags;			/* hardware flags defined above */

	/* Set to the size of a needed device specific skb headroom for TX skbs. */
	unsigned int extra_tx_headroom;

	/* This is the time in us to change channels
	 */
	int channel_change_time;
	/* Maximum values for various statistics.
	 * Leave at 0 to indicate no support. Use negative numbers for dBm. */
	s8 max_rssi;
	s8 max_signal;
	s8 max_noise;

	/* Number of available hardware TX queues for data packets.
	 * WMM requires at least four queues. */
	int queues;
};

static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev)
{
	set_wiphy_dev(hw->wiphy, dev);
}

static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr)
{
	memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN);
}

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/*
 * flags for change_filter_flags()
 *
 * Note that e.g. if PROMISC_IN_BSS is unset then
 * you should still do MAC address filtering if
 * possible even if OTHER_BSS is set to indicate
 * no BSSID filtering should be done.
 */
/*
 * promiscuous mode within your BSS,
 * think of the BSS as your network segment and then this corresponds
 * to the regular ethernet device promiscuous mode
 */
#define FIF_PROMISC_IN_BSS	0x01
/* show all multicast frames */
#define FIF_ALLMULTI		0x02
/* show frames with failed FCS, but set RX_FLAG_FAILED_FCS_CRC for them */
#define FIF_FCSFAIL		0x04
/* show frames with failed PLCP CRC, but set RX_FLAG_FAILED_PLCP_CRC for them */
#define FIF_PLCPFAIL		0x08
/*
 * This flag is set during scanning to indicate to the hardware
 * that it should not filter beacons or probe responses by BSSID.
 */
#define FIF_BCN_PRBRESP_PROMISC	0x10
/*
 * show control frames, if PROMISC_IN_BSS is not set then
 * only those addressed to this station
 */
#define FIF_CONTROL		0x20
/* show frames from other BSSes */
#define FIF_OTHER_BSS		0x40

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/* Configuration block used by the low-level driver to tell the 802.11 code
 * about supported hardware features and to pass function pointers to callback
 * functions. */
struct ieee80211_ops {
	/* 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 atomic. */
	int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb,
		  struct ieee80211_tx_control *control);

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	/*
	 * 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.
	 */
	int (*start)(struct ieee80211_hw *hw);

	/*
	 * 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.
	 */
	void (*stop)(struct ieee80211_hw *hw);

	/*
	 * 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.
	 *
	 * Must be implemented.
772
	 */
773 774 775
	int (*add_interface)(struct ieee80211_hw *hw,
			     struct ieee80211_if_init_conf *conf);

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	/*
	 * Notifies a driver that an interface is going down. The stop() handler
	 * 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.
	 */
787 788 789 790 791 792 793 794 795 796 797 798
	void (*remove_interface)(struct ieee80211_hw *hw,
				 struct ieee80211_if_init_conf *conf);

	/* Handler for configuration requests. IEEE 802.11 code calls this
	 * function to change hardware configuration, e.g., channel. */
	int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf);

	/* Handler for configuration requests related to interfaces (e.g.
	 * BSSID). */
	int (*config_interface)(struct ieee80211_hw *hw,
				int if_id, struct ieee80211_if_conf *conf);

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	/*
	 * Configure the device's RX filter.
	 *
	 * The multicast address filter must be changed if the hardware flags
	 * indicate that one is present.
	 *
	 * All unsupported flags in 'total_flags' must be cleared,
	 * clear all bits except those you honoured.
	 *
	 * The callback must be implemented and must be atomic.
	 */
	void (*configure_filter)(struct ieee80211_hw *hw,
				 unsigned int changed_flags,
				 unsigned int *total_flags,
				 int mc_count, struct dev_addr_list *mc_list);
814 815 816 817 818 819 820 821 822

	/* Set TIM bit handler. If the hardware/firmware takes care of beacon
	 * generation, IEEE 802.11 code uses this function to tell the
	 * low-level to set (or clear if set==0) TIM bit for the given aid. If
	 * host system is used to generate beacons, this handler is not used
	 * and low-level driver should set it to NULL.
	 * Must be atomic. */
	int (*set_tim)(struct ieee80211_hw *hw, int aid, int set);

823 824 825 826 827
	/*
	 * Set encryption key.
	 *
	 * This is called to enable hardware acceleration of encryption and
	 * decryption. The address will be the broadcast address for default
828 829 830 831 832 833
	 * keys, the other station's hardware address for individual keys or
	 * the zero address for keys that will be used only for transmission.
	 *
	 * The local_address parameter will always be set to our own address,
	 * this is only relevant if you support multiple local addresses.
	 *
834 835
	 * When transmitting, the TX control data will use the hw_key_idx
	 * selected by the low-level driver.
836 837
	 *
	 * Return 0 if the key is now in use, -EOPNOTSUPP or -ENOSPC if it
838 839 840 841
	 * 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.
842
	 *
843 844 845 846 847
	 * 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.
	 *
848 849 850 851 852 853 854
	 * 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.
	 *
	 * The 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.
855
	 */
856
	int (*set_key)(struct ieee80211_hw *hw, set_key_cmd cmd,
857 858
		       const u8 *local_address, const u8 *address,
		       struct ieee80211_key_conf *key);
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	/* Enable/disable IEEE 802.1X. This item requests wlan card to pass
	 * unencrypted EAPOL-Key frames even when encryption is configured.
	 * If the wlan card does not require such a configuration, this
	 * function pointer can be set to NULL. */
	int (*set_ieee8021x)(struct ieee80211_hw *hw, int use_ieee8021x);

	/* Set port authorization state (IEEE 802.1X PAE) to be authorized
	 * (authorized=1) or unauthorized (authorized=0). This function can be
	 * used if the wlan hardware or low-level driver implements PAE.
	 * 80211.o module will anyway filter frames based on authorization
	 * state, so this function pointer can be NULL if low-level driver does
	 * not require event notification about port state changes.
	 * Currently unused. */
	int (*set_port_auth)(struct ieee80211_hw *hw, u8 *addr,
			     int authorized);

	/* Ask the hardware to service the scan request, no need to start
	 * the scan state machine in stack. */
	int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len);

	/* return low-level statistics */
	int (*get_stats)(struct ieee80211_hw *hw,
			 struct ieee80211_low_level_stats *stats);

	/* For devices that generate their own beacons and probe response
	 * or association responses this updates the state of privacy_invoked
	 * returns 0 for success or an error number */
	int (*set_privacy_invoked)(struct ieee80211_hw *hw,
				   int privacy_invoked);

	/* For devices that have internal sequence counters, allow 802.11
	 * code to access the current value of a counter */
	int (*get_sequence_counter)(struct ieee80211_hw *hw,
				    u8* addr, u8 keyidx, u8 txrx,
				    u32* iv32, u16* iv16);

	/* Configuration of RTS threshold (if device needs it) */
	int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value);

	/* 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. */
	int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value);

	/* Configuration of retry limits (if device needs it) */
	int (*set_retry_limit)(struct ieee80211_hw *hw,
			       u32 short_retry, u32 long_retr);

	/* Number of STAs in STA table notification (NULL = disabled).
	 * Must be atomic. */
	void (*sta_table_notification)(struct ieee80211_hw *hw,
				       int num_sta);

914 915 916 917 918 919 920 921
	/* Handle ERP IE change notifications. Must be atomic. */
	void (*erp_ie_changed)(struct ieee80211_hw *hw, u8 changes,
			       int cts_protection, int preamble);

	/* Flags for the erp_ie_changed changes parameter */
#define IEEE80211_ERP_CHANGE_PROTECTION (1<<0) /* protection flag changed */
#define IEEE80211_ERP_CHANGE_PREAMBLE (1<<1) /* barker preamble mode changed */

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	/* Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
	 * bursting) for a hardware TX queue.
	 * queue = IEEE80211_TX_QUEUE_*.
	 * Must be atomic. */
	int (*conf_tx)(struct ieee80211_hw *hw, int queue,
		       const struct ieee80211_tx_queue_params *params);

	/* 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).
	 * Currently unused. */
	int (*get_tx_stats)(struct ieee80211_hw *hw,
			    struct ieee80211_tx_queue_stats *stats);

	/* 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. */
	u64 (*get_tsf)(struct ieee80211_hw *hw);

	/* 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. */
	void (*reset_tsf)(struct ieee80211_hw *hw);

	/* Setup beacon data for IBSS beacons. Unlike access point (Master),
	 * IBSS uses a fixed beacon frame which is configured using this
	 * function. This handler is required only for IBSS mode. */
	int (*beacon_update)(struct ieee80211_hw *hw,
			     struct sk_buff *skb,
			     struct ieee80211_tx_control *control);

	/* 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. */
	int (*tx_last_beacon)(struct ieee80211_hw *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. 802.11 code allocates a private data
 * area for the low-level driver. The size of this area is given as
 * priv_data_len.
 */
struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
					const struct ieee80211_ops *ops);

/* Register hardware device to the IEEE 802.11 code and kernel. Low-level
 * drivers must call this function before using any other IEEE 802.11
 * function except ieee80211_register_hwmode. */
int ieee80211_register_hw(struct ieee80211_hw *hw);

/* driver can use this and ieee80211_get_rx_led_name to get the
 * name of the registered LEDs after ieee80211_register_hw
 * was called.
 * This is useful to set the default trigger on the LED class
 * device that your driver should export for each LED the device
 * has, that way the default behaviour will be as expected but
 * the user can still change it/turn off the LED etc.
 */
#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);
#endif
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
}

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
}

/* Register a new hardware PHYMODE capability to the stack. */
int ieee80211_register_hwmode(struct ieee80211_hw *hw,
			      struct ieee80211_hw_mode *mode);

/* Unregister a hardware device. This function instructs 802.11 code to free
 * allocated resources and unregister netdevices from the kernel. */
void ieee80211_unregister_hw(struct ieee80211_hw *hw);

/* Free everything that was allocated including private data of a driver. */
void ieee80211_free_hw(struct ieee80211_hw *hw);

/* Receive frame callback function. The low-level driver uses this function to
 * send received frames to the IEEE 802.11 code. Receive buffer (skb) must
 * start with IEEE 802.11 header. */
void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
		    struct ieee80211_rx_status *status);
void ieee80211_rx_irqsafe(struct ieee80211_hw *hw,
			  struct sk_buff *skb,
			  struct ieee80211_rx_status *status);

/* Transmit status callback function. The low-level driver must call this
 * function to report transmit status for all the TX frames that had
 * req_tx_status set in the transmit control fields. In addition, this should
 * be called at least for all unicast frames to provide information for TX rate
 * control algorithm. In order to maintain all statistics, this function is
 * recommended to be called after each frame, including multicast/broadcast, is
 * sent. */
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().
1060
 * @if_id: interface ID from &struct ieee80211_if_init_conf.
1061 1062 1063 1064 1065 1066 1067 1068 1069 1070
 * @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.
 */
1071
void ieee80211_rts_get(struct ieee80211_hw *hw, int if_id,
1072 1073 1074 1075 1076 1077 1078
		       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().
1079
 * @if_id: interface ID from &struct ieee80211_if_init_conf.
1080 1081 1082 1083 1084 1085 1086
 * @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.
 */
1087
__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, int if_id,
1088 1089 1090 1091 1092 1093
			      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().
1094
 * @if_id: interface ID from &struct ieee80211_if_init_conf.
1095 1096 1097 1098 1099 1100 1101 1102 1103 1104
 * @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.
 */
1105
void ieee80211_ctstoself_get(struct ieee80211_hw *hw, int if_id,
1106 1107 1108 1109 1110 1111 1112
			     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().
1113
 * @if_id: interface ID from &struct ieee80211_if_init_conf.
1114 1115 1116 1117 1118 1119 1120
 * @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.
 */
1121
__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, int if_id,
1122 1123 1124 1125 1126 1127
				    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().
1128
 * @if_id: interface ID from &struct ieee80211_if_init_conf.
1129 1130 1131 1132 1133 1134
 * @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).
 */
1135
__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, int if_id,
1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251
					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);

/* Given an sk_buff 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.
 */
int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb);

/* Like ieee80211_get_hdrlen_from_skb() but takes a FC in CPU order. */
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);

/* called by driver to notify scan status completed */
void ieee80211_scan_completed(struct ieee80211_hw *hw);

/* return a pointer to the source address (SA) */
static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
{
	u8 *raw = (u8 *) hdr;
	u8 tofrom = (*(raw+1)) & 3; /* get the TODS and FROMDS bits */

	switch (tofrom) {
		case 2:
			return hdr->addr3;
		case 3:
			return hdr->addr4;
	}
	return hdr->addr2;
}

/* return a pointer to the destination address (DA) */
static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
{
	u8 *raw = (u8 *) hdr;
	u8 to_ds = (*(raw+1)) & 1; /* get the TODS bit */

	if (to_ds)
		return hdr->addr3;
	return hdr->addr1;
}

static inline int ieee80211_get_morefrag(struct ieee80211_hdr *hdr)
{
	return (le16_to_cpu(hdr->frame_control) &
		IEEE80211_FCTL_MOREFRAGS) != 0;
}

#endif /* MAC80211_H */