ieee80211_i.h

linux 内核源代码

	struct ieee80211_hw hw;

	const struct ieee80211_ops *ops;

	/* List of registered struct ieee80211_hw_mode */
	struct list_head modes_list;

	struct net_device *mdev; /* wmaster# - "master" 802.11 device */
	int open_count;
	int monitors;
	unsigned int filter_flags; /* FIF_* */
	struct iw_statistics wstats;
	u8 wstats_flags;
	int tx_headroom; /* required headroom for hardware/radiotap */

	enum {
		IEEE80211_DEV_UNINITIALIZED = 0,
		IEEE80211_DEV_REGISTERED,
		IEEE80211_DEV_UNREGISTERED,
	} reg_state;

	/* Tasklet and skb queue to process calls from IRQ mode. All frames
	 * added to skb_queue will be processed, but frames in
	 * skb_queue_unreliable may be dropped if the total length of these
	 * queues increases over the limit. */
#define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
	struct tasklet_struct tasklet;
	struct sk_buff_head skb_queue;
	struct sk_buff_head skb_queue_unreliable;

	/* Station data structures */
	rwlock_t sta_lock; /* protects STA data structures */
	int num_sta; /* number of stations in sta_list */
	struct list_head sta_list;
	struct sta_info *sta_hash[STA_HASH_SIZE];
	struct timer_list sta_cleanup;

	unsigned long state[NUM_TX_DATA_QUEUES];
	struct ieee80211_tx_stored_packet pending_packet[NUM_TX_DATA_QUEUES];
	struct tasklet_struct tx_pending_tasklet;

	/* number of interfaces with corresponding IFF_ flags */
	atomic_t iff_allmultis, iff_promiscs;

	struct rate_control_ref *rate_ctrl;

	/* Supported and basic rate filters for different modes. These are
	 * pointers to -1 terminated lists and rates in 100 kbps units. */
	int *supp_rates[NUM_IEEE80211_MODES];
	int *basic_rates[NUM_IEEE80211_MODES];

	int rts_threshold;
	int fragmentation_threshold;
	int short_retry_limit; /* dot11ShortRetryLimit */
	int long_retry_limit; /* dot11LongRetryLimit */

	struct crypto_blkcipher *wep_tx_tfm;
	struct crypto_blkcipher *wep_rx_tfm;
	u32 wep_iv;

	int bridge_packets; /* bridge packets between associated stations and
			     * deliver multicast frames both back to wireless
			     * media and to the local net stack */

	ieee80211_rx_handler *rx_pre_handlers;
	ieee80211_rx_handler *rx_handlers;
	ieee80211_tx_handler *tx_handlers;

	struct list_head interfaces;

	int sta_scanning;
	int scan_channel_idx;
	enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
	unsigned long last_scan_completed;
	struct delayed_work scan_work;
	struct net_device *scan_dev;
	struct ieee80211_channel *oper_channel, *scan_channel;
	struct ieee80211_hw_mode *oper_hw_mode, *scan_hw_mode;
	u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
	size_t scan_ssid_len;
	struct list_head sta_bss_list;
	struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE];
	spinlock_t sta_bss_lock;
#define IEEE80211_SCAN_MATCH_SSID BIT(0)
#define IEEE80211_SCAN_WPA_ONLY BIT(1)
#define IEEE80211_SCAN_EXTRA_INFO BIT(2)
	int scan_flags;

	/* SNMP counters */
	/* dot11CountersTable */
	u32 dot11TransmittedFragmentCount;
	u32 dot11MulticastTransmittedFrameCount;
	u32 dot11FailedCount;
	u32 dot11RetryCount;
	u32 dot11MultipleRetryCount;
	u32 dot11FrameDuplicateCount;
	u32 dot11ReceivedFragmentCount;
	u32 dot11MulticastReceivedFrameCount;
	u32 dot11TransmittedFrameCount;
	u32 dot11WEPUndecryptableCount;

#ifdef CONFIG_MAC80211_LEDS
	int tx_led_counter, rx_led_counter;
	struct led_trigger *tx_led, *rx_led, *assoc_led;
	char tx_led_name[32], rx_led_name[32], assoc_led_name[32];
#endif

	u32 channel_use;
	u32 channel_use_raw;

#ifdef CONFIG_MAC80211_DEBUGFS
	struct work_struct sta_debugfs_add;
#endif

#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
	/* TX/RX handler statistics */
	unsigned int tx_handlers_drop;
	unsigned int tx_handlers_queued;
	unsigned int tx_handlers_drop_unencrypted;
	unsigned int tx_handlers_drop_fragment;
	unsigned int tx_handlers_drop_wep;
	unsigned int tx_handlers_drop_not_assoc;
	unsigned int tx_handlers_drop_unauth_port;
	unsigned int rx_handlers_drop;
	unsigned int rx_handlers_queued;
	unsigned int rx_handlers_drop_nullfunc;
	unsigned int rx_handlers_drop_defrag;
	unsigned int rx_handlers_drop_short;
	unsigned int rx_handlers_drop_passive_scan;
	unsigned int tx_expand_skb_head;
	unsigned int tx_expand_skb_head_cloned;
	unsigned int rx_expand_skb_head;
	unsigned int rx_expand_skb_head2;
	unsigned int rx_handlers_fragments;
	unsigned int tx_status_drop;
	unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
	unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
#define I802_DEBUG_INC(c) (c)++
#else /* CONFIG_MAC80211_DEBUG_COUNTERS */
#define I802_DEBUG_INC(c) do { } while (0)
#endif /* CONFIG_MAC80211_DEBUG_COUNTERS */


	int total_ps_buffered; /* total number of all buffered unicast and
				* multicast packets for power saving stations
				*/
	int wifi_wme_noack_test;
	unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */

	unsigned int enabled_modes; /* bitfield of allowed modes;
				      * (1 << MODE_*) */
	unsigned int hw_modes; /* bitfield of supported hardware modes;
				* (1 << MODE_*) */

#ifdef CONFIG_MAC80211_DEBUGFS
	struct local_debugfsdentries {
		struct dentry *channel;
		struct dentry *frequency;
		struct dentry *antenna_sel_tx;
		struct dentry *antenna_sel_rx;
		struct dentry *bridge_packets;
		struct dentry *rts_threshold;
		struct dentry *fragmentation_threshold;
		struct dentry *short_retry_limit;
		struct dentry *long_retry_limit;
		struct dentry *total_ps_buffered;
		struct dentry *mode;
		struct dentry *wep_iv;
		struct dentry *modes;
		struct dentry *statistics;
		struct local_debugfsdentries_statsdentries {
			struct dentry *transmitted_fragment_count;
			struct dentry *multicast_transmitted_frame_count;
			struct dentry *failed_count;
			struct dentry *retry_count;
			struct dentry *multiple_retry_count;
			struct dentry *frame_duplicate_count;
			struct dentry *received_fragment_count;
			struct dentry *multicast_received_frame_count;
			struct dentry *transmitted_frame_count;
			struct dentry *wep_undecryptable_count;
			struct dentry *num_scans;
#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
			struct dentry *tx_handlers_drop;
			struct dentry *tx_handlers_queued;
			struct dentry *tx_handlers_drop_unencrypted;
			struct dentry *tx_handlers_drop_fragment;
			struct dentry *tx_handlers_drop_wep;
			struct dentry *tx_handlers_drop_not_assoc;
			struct dentry *tx_handlers_drop_unauth_port;
			struct dentry *rx_handlers_drop;
			struct dentry *rx_handlers_queued;
			struct dentry *rx_handlers_drop_nullfunc;
			struct dentry *rx_handlers_drop_defrag;
			struct dentry *rx_handlers_drop_short;
			struct dentry *rx_handlers_drop_passive_scan;
			struct dentry *tx_expand_skb_head;
			struct dentry *tx_expand_skb_head_cloned;
			struct dentry *rx_expand_skb_head;
			struct dentry *rx_expand_skb_head2;
			struct dentry *rx_handlers_fragments;
			struct dentry *tx_status_drop;
			struct dentry *wme_tx_queue;
			struct dentry *wme_rx_queue;
#endif
			struct dentry *dot11ACKFailureCount;
			struct dentry *dot11RTSFailureCount;
			struct dentry *dot11FCSErrorCount;
			struct dentry *dot11RTSSuccessCount;
		} stats;
		struct dentry *stations;
		struct dentry *keys;
	} debugfs;
#endif
};

static inline struct ieee80211_local *hw_to_local(
	struct ieee80211_hw *hw)
{
	return container_of(hw, struct ieee80211_local, hw);
}

static inline struct ieee80211_hw *local_to_hw(
	struct ieee80211_local *local)
{
	return &local->hw;
}

enum ieee80211_link_state_t {
	IEEE80211_LINK_STATE_XOFF = 0,
	IEEE80211_LINK_STATE_PENDING,
};

struct sta_attribute {
	struct attribute attr;
	ssize_t (*show)(const struct sta_info *, char *buf);
	ssize_t (*store)(struct sta_info *, const char *buf, size_t count);
};

static inline void __bss_tim_set(struct ieee80211_if_ap *bss, u16 aid)
{
	/*
	 * This format has been mandated by the IEEE specifications,
	 * so this line may not be changed to use the __set_bit() format.
	 */
	bss->tim[aid / 8] |= (1 << (aid % 8));
}

static inline void bss_tim_set(struct ieee80211_local *local,
			       struct ieee80211_if_ap *bss, u16 aid)
{
	read_lock_bh(&local->sta_lock);
	__bss_tim_set(bss, aid);
	read_unlock_bh(&local->sta_lock);
}

static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, u16 aid)
{
	/*
	 * This format has been mandated by the IEEE specifications,
	 * so this line may not be changed to use the __clear_bit() format.
	 */
	bss->tim[aid / 8] &= ~(1 << (aid % 8));
}

static inline void bss_tim_clear(struct ieee80211_local *local,
				 struct ieee80211_if_ap *bss, u16 aid)
{
	read_lock_bh(&local->sta_lock);
	__bss_tim_clear(bss, aid);
	read_unlock_bh(&local->sta_lock);
}

/**
 * ieee80211_is_erp_rate - Check if a rate is an ERP rate
 * @phymode: The PHY-mode for this rate (MODE_IEEE80211...)
 * @rate: Transmission rate to check, in 100 kbps
 *
 * Check if a given rate is an Extended Rate PHY (ERP) rate.
 */
static inline int ieee80211_is_erp_rate(int phymode, int rate)
{
	if (phymode == MODE_IEEE80211G) {
		if (rate != 10 && rate != 20 &&
		    rate != 55 && rate != 110)
			return 1;
	}
	return 0;
}

static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
{
	return compare_ether_addr(raddr, addr) == 0 ||
	       is_broadcast_ether_addr(raddr);
}


/* ieee80211.c */
int ieee80211_hw_config(struct ieee80211_local *local);
int ieee80211_if_config(struct net_device *dev);
int ieee80211_if_config_beacon(struct net_device *dev);
void ieee80211_prepare_rates(struct ieee80211_local *local,
			     struct ieee80211_hw_mode *mode);
void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx);
int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr);
void ieee80211_if_setup(struct net_device *dev);
struct ieee80211_rate *ieee80211_get_rate(struct ieee80211_local *local,
					  int phymode, int hwrate);

/* ieee80211_ioctl.c */
extern const struct iw_handler_def ieee80211_iw_handler_def;


/* Least common multiple of the used rates (in 100 kbps). This is used to
 * calculate rate_inv values for each rate so that only integers are needed. */
#define CHAN_UTIL_RATE_LCM 95040
/* 1 usec is 1/8 * (95040/10) = 1188 */
#define CHAN_UTIL_PER_USEC 1188
/* Amount of bits to shift the result right to scale the total utilization
 * to values that will not wrap around 32-bit integers. */
#define CHAN_UTIL_SHIFT 9
/* Theoretical maximum of channel utilization counter in 10 ms (stat_time=1):
 * (CHAN_UTIL_PER_USEC * 10000) >> CHAN_UTIL_SHIFT = 23203. So dividing the
 * raw value with about 23 should give utilization in 10th of a percentage
 * (1/1000). However, utilization is only estimated and not all intervals
 * between frames etc. are calculated. 18 seems to give numbers that are closer
 * to the real maximum. */
#define CHAN_UTIL_PER_10MS 18
#define CHAN_UTIL_HDR_LONG (202 * CHAN_UTIL_PER_USEC)
#define CHAN_UTIL_HDR_SHORT (40 * CHAN_UTIL_PER_USEC)


/* ieee80211_ioctl.c */
int ieee80211_set_compression(struct ieee80211_local *local,
			      struct net_device *dev, struct sta_info *sta);
int ieee80211_set_channel(struct ieee80211_local *local, int channel, int freq);
/* ieee80211_sta.c */
void ieee80211_sta_timer(unsigned long data);
void ieee80211_sta_work(struct work_struct *work);
void ieee80211_sta_scan_work(struct work_struct *work);
void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
			   struct ieee80211_rx_status *rx_status);
int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len);
int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len);
int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid);
int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len);
void ieee80211_sta_req_auth(struct net_device *dev,
			    struct ieee80211_if_sta *ifsta);
int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len);
void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
			   struct ieee80211_rx_status *rx_status);
void ieee80211_rx_bss_list_init(struct net_device *dev);
void ieee80211_rx_bss_list_deinit(struct net_device *dev);
int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len);
struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
					 struct sk_buff *skb, u8 *bssid,
					 u8 *addr);
int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes);
void ieee80211_reset_erp_info(struct net_device *dev);

/* ieee80211_iface.c */
int ieee80211_if_add(struct net_device *dev, const char *name,
		     struct net_device **new_dev, int type);
void ieee80211_if_set_type(struct net_device *dev, int type);
void ieee80211_if_reinit(struct net_device *dev);
void __ieee80211_if_del(struct ieee80211_local *local,
			struct ieee80211_sub_if_data *sdata);
int ieee80211_if_remove(struct net_device *dev, const char *name, int id);
void ieee80211_if_free(struct net_device *dev);
void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata);

/* regdomain.c */
void ieee80211_regdomain_init(void);
void ieee80211_set_default_regdomain(struct ieee80211_hw_mode *mode);

/* rx handling */
extern ieee80211_rx_handler ieee80211_rx_pre_handlers[];
extern ieee80211_rx_handler ieee80211_rx_handlers[];

/* tx handling */
extern ieee80211_tx_handler ieee80211_tx_handlers[];
void ieee80211_clear_tx_pending(struct ieee80211_local *local);
void ieee80211_tx_pending(unsigned long data);
int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);

/* utility functions/constants */
extern void *mac80211_wiphy_privid; /* for wiphy privid */
extern const unsigned char rfc1042_header[6];
extern const unsigned char bridge_tunnel_header[6];
u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len);
int ieee80211_is_eapol(const struct sk_buff *skb);
int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
			     int rate, int erp, int short_preamble);
void mac80211_ev_michael_mic_failure(struct net_device *dev, int keyidx,
				     struct ieee80211_hdr *hdr);

#endif /* IEEE80211_I_H */