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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.
+ */
+struct ieee80211_hw {
+ struct ieee80211_conf conf;
+ struct wiphy *wiphy;
+ struct workqueue_struct *workqueue;
+ 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.
+ *
+ * @set_ieee8021x: 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.
+ *
+ * @set_port_auth: Set port authorization state (IEEE 802.1X PAE) to be
+ * authorized (@authorized=1) or unauthorized (=0). This function can be
+ * used if the wlan hardware or low-level driver implements PAE.
+ * mac80211 will filter frames based on authorization state in any case,
+ * so this function pointer can be NULL if low-level driver does not
+ * require event notification about port state changes.
+ *
+ * @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
+ *
+ * @set_privacy_invoked: 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.
+ *
+ * @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 (*set_ieee8021x)(struct ieee80211_hw *hw, int use_ieee8021x);
+ int (*set_port_auth)(struct ieee80211_hw *hw, u8 *addr,
+ int authorized);
+ 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 (*set_privacy_invoked)(struct ieee80211_hw *hw,
+ int privacy_invoked);
+ 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);
+
+#define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x"
+#define MAC_ARG(x) ((u8*)(x))[0], ((u8*)(x))[1], ((u8*)(x))[2], \
+ ((u8*)(x))[3], ((u8*)(x))[4], ((u8*)(x))[5]
+
+#endif /* MAC80211_H */