[MAC80211]: Add mac80211 wireless stack.

Add mac80211, the IEEE 802.11 software MAC layer.

Signed-off-by: Jiri Benc <jbenc@suse.cz>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 671 insertions, 0 deletions

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
new file mode 100644
index 000000000000..ae94d6461798
--- /dev/null
+++ b/net/mac80211/ieee80211_i.h
@@ -0,0 +1,671 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005, Devicescape Software, Inc.
+ * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
+ *
+ * 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 IEEE80211_I_H
+#define IEEE80211_I_H
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/if_ether.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/workqueue.h>
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <net/wireless.h>
+#include "ieee80211_key.h"
+#include "sta_info.h"
+
+/* ieee80211.o internal definitions, etc. These are not included into
+ * low-level drivers. */
+
+#ifndef ETH_P_PAE
+#define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
+#endif /* ETH_P_PAE */
+
+#define WLAN_FC_DATA_PRESENT(fc) (((fc) & 0x4c) == 0x08)
+
+struct ieee80211_local;
+
+#define BIT(x) (1 << (x))
+
+#define IEEE80211_ALIGN32_PAD(a) ((4 - ((a) & 3)) & 3)
+
+/* Maximum number of broadcast/multicast frames to buffer when some of the
+ * associated stations are using power saving. */
+#define AP_MAX_BC_BUFFER 128
+
+/* Maximum number of frames buffered to all STAs, including multicast frames.
+ * Note: increasing this limit increases the potential memory requirement. Each
+ * frame can be up to about 2 kB long. */
+#define TOTAL_MAX_TX_BUFFER 512
+
+/* Required encryption head and tailroom */
+#define IEEE80211_ENCRYPT_HEADROOM 8
+#define IEEE80211_ENCRYPT_TAILROOM 12
+
+/* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
+ * reception of at least three fragmented frames. This limit can be increased
+ * by changing this define, at the cost of slower frame reassembly and
+ * increased memory use (about 2 kB of RAM per entry). */
+#define IEEE80211_FRAGMENT_MAX 4
+
+struct ieee80211_fragment_entry {
+        unsigned long first_frag_time;
+        unsigned int seq;
+        unsigned int rx_queue;
+        unsigned int last_frag;
+        unsigned int extra_len;
+        struct sk_buff_head skb_list;
+        int ccmp; /* Whether fragments were encrypted with CCMP */
+        u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
+};
+
+
+struct ieee80211_sta_bss {
+        struct list_head list;
+        struct ieee80211_sta_bss *hnext;
+        atomic_t users;
+
+        u8 bssid[ETH_ALEN];
+        u8 ssid[IEEE80211_MAX_SSID_LEN];
+        size_t ssid_len;
+        u16 capability; /* host byte order */
+        int hw_mode;
+        int channel;
+        int freq;
+        int rssi, signal, noise;
+        u8 *wpa_ie;
+        size_t wpa_ie_len;
+        u8 *rsn_ie;
+        size_t rsn_ie_len;
+        u8 *wmm_ie;
+        size_t wmm_ie_len;
+#define IEEE80211_MAX_SUPP_RATES 32
+        u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
+        size_t supp_rates_len;
+        int beacon_int;
+        u64 timestamp;
+
+        int probe_resp;
+        unsigned long last_update;
+
+};
+
+
+typedef enum {
+        TXRX_CONTINUE, TXRX_DROP, TXRX_QUEUED
+} ieee80211_txrx_result;
+
+struct ieee80211_txrx_data {
+        struct sk_buff *skb;
+        struct net_device *dev;
+        struct ieee80211_local *local;
+        struct ieee80211_sub_if_data *sdata;
+        struct sta_info *sta;
+        u16 fc, ethertype;
+        struct ieee80211_key *key;
+        unsigned int fragmented:1; /* whether the MSDU was fragmented */
+        union {
+                struct {
+                        struct ieee80211_tx_control *control;
+                        unsigned int unicast:1;
+                        unsigned int ps_buffered:1;
+                        unsigned int short_preamble:1;
+                        unsigned int probe_last_frag:1;
+                        struct ieee80211_hw_mode *mode;
+                        struct ieee80211_rate *rate;
+                        /* use this rate (if set) for last fragment; rate can
+                         * be set to lower rate for the first fragments, e.g.,
+                         * when using CTS protection with IEEE 802.11g. */
+                        struct ieee80211_rate *last_frag_rate;
+                        int last_frag_hwrate;
+                        int mgmt_interface;
+
+                        /* Extra fragments (in addition to the first fragment
+                         * in skb) */
+                        int num_extra_frag;
+                        struct sk_buff **extra_frag;
+                } tx;
+                struct {
+                        struct ieee80211_rx_status *status;
+                        int sent_ps_buffered;
+                        int queue;
+                        int load;
+                        unsigned int in_scan:1;
+                        /* frame is destined to interface currently processed
+                         * (including multicast frames) */
+                        unsigned int ra_match:1;
+                } rx;
+        } u;
+};
+
+/* Stored in sk_buff->cb */
+struct ieee80211_tx_packet_data {
+        int ifindex;
+        unsigned long jiffies;
+        unsigned int req_tx_status:1;
+        unsigned int do_not_encrypt:1;
+        unsigned int requeue:1;
+        unsigned int mgmt_iface:1;
+        unsigned int queue:4;
+};
+
+struct ieee80211_tx_stored_packet {
+        struct ieee80211_tx_control control;
+        struct sk_buff *skb;
+        int num_extra_frag;
+        struct sk_buff **extra_frag;
+        int last_frag_rateidx;
+        int last_frag_hwrate;
+        struct ieee80211_rate *last_frag_rate;
+        unsigned int last_frag_rate_ctrl_probe:1;
+};
+
+typedef ieee80211_txrx_result (*ieee80211_tx_handler)
+(struct ieee80211_txrx_data *tx);
+
+typedef ieee80211_txrx_result (*ieee80211_rx_handler)
+(struct ieee80211_txrx_data *rx);
+
+struct ieee80211_if_ap {
+        u8 *beacon_head, *beacon_tail;
+        int beacon_head_len, beacon_tail_len;
+
+        u8 ssid[IEEE80211_MAX_SSID_LEN];
+        size_t ssid_len;
+        u8 *generic_elem;
+        size_t generic_elem_len;
+
+        /* yes, this looks ugly, but guarantees that we can later use
+         * bitmap_empty :)
+         * NB: don't ever use set_bit, use bss_tim_set/bss_tim_clear! */
+        u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
+        atomic_t num_sta_ps; /* number of stations in PS mode */
+        struct sk_buff_head ps_bc_buf;
+        int dtim_period, dtim_count;
+        int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
+        int max_ratectrl_rateidx; /* max TX rateidx for rate control */
+        int num_beacons; /* number of TXed beacon frames for this BSS */
+};
+
+struct ieee80211_if_wds {
+        u8 remote_addr[ETH_ALEN];
+        struct sta_info *sta;
+};
+
+struct ieee80211_if_vlan {
+        u8 id;
+};
+
+struct ieee80211_if_sta {
+        enum {
+                IEEE80211_DISABLED, IEEE80211_AUTHENTICATE,
+                IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED,
+                IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED
+        } state;
+        struct timer_list timer;
+        struct work_struct work;
+        u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
+        u8 ssid[IEEE80211_MAX_SSID_LEN];
+        size_t ssid_len;
+        u16 aid;
+        u16 ap_capab, capab;
+        u8 *extra_ie; /* to be added to the end of AssocReq */
+        size_t extra_ie_len;
+
+        /* The last AssocReq/Resp IEs */
+        u8 *assocreq_ies, *assocresp_ies;
+        size_t assocreq_ies_len, assocresp_ies_len;
+
+        int auth_tries, assoc_tries;
+
+        unsigned int ssid_set:1;
+        unsigned int bssid_set:1;
+        unsigned int prev_bssid_set:1;
+        unsigned int authenticated:1;
+        unsigned int associated:1;
+        unsigned int probereq_poll:1;
+        unsigned int use_protection:1;
+        unsigned int create_ibss:1;
+        unsigned int mixed_cell:1;
+        unsigned int wmm_enabled:1;
+        unsigned int auto_ssid_sel:1;
+        unsigned int auto_bssid_sel:1;
+        unsigned int auto_channel_sel:1;
+#define IEEE80211_STA_REQ_SCAN 0
+#define IEEE80211_STA_REQ_AUTH 1
+#define IEEE80211_STA_REQ_RUN  2
+        unsigned long request;
+        struct sk_buff_head skb_queue;
+
+        int key_mgmt;
+        unsigned long last_probe;
+
+#define IEEE80211_AUTH_ALG_OPEN BIT(0)
+#define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
+#define IEEE80211_AUTH_ALG_LEAP BIT(2)
+        unsigned int auth_algs; /* bitfield of allowed auth algs */
+        int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
+        int auth_transaction;
+
+        unsigned long ibss_join_req;
+        struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
+        u32 supp_rates_bits;
+
+        int wmm_last_param_set;
+};
+
+
+struct ieee80211_sub_if_data {
+        struct list_head list;
+        unsigned int type;
+
+        struct wireless_dev wdev;
+
+        struct net_device *dev;
+        struct ieee80211_local *local;
+
+        int mc_count;
+        unsigned int allmulti:1;
+        unsigned int promisc:1;
+
+        struct net_device_stats stats;
+        int drop_unencrypted;
+        int eapol; /* 0 = process EAPOL frames as normal data frames,
+                    * 1 = send EAPOL frames through wlan#ap to hostapd
+                    *     (default) */
+        int ieee802_1x; /* IEEE 802.1X PAE - drop packet to/from unauthorized
+                         * port */
+
+        u16 sequence;
+
+        /* Fragment table for host-based reassembly */
+        struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
+        unsigned int fragment_next;
+
+#define NUM_DEFAULT_KEYS 4
+        struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
+        struct ieee80211_key *default_key;
+
+        struct ieee80211_if_ap *bss; /* BSS that this device belongs to */
+
+        union {
+                struct ieee80211_if_ap ap;
+                struct ieee80211_if_wds wds;
+                struct ieee80211_if_vlan vlan;
+                struct ieee80211_if_sta sta;
+        } u;
+        int channel_use;
+        int channel_use_raw;
+};
+
+#define IEEE80211_DEV_TO_SUB_IF(dev) netdev_priv(dev)
+
+enum {
+        IEEE80211_RX_MSG        = 1,
+        IEEE80211_TX_STATUS_MSG = 2,
+};
+
+struct ieee80211_local {
+        /* embed the driver visible part.
+         * don't cast (use the static inlines below), but we keep
+         * it first anyway so they become a no-op */
+        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 */
+        struct net_device *apdev; /* wlan#ap - management frames (hostapd) */
+        int open_count;
+        int monitors;
+        struct iw_statistics wstats;
+        u8 wstats_flags;
+
+        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 */
+        spinlock_t sta_lock; /* mutex for STA data structures */
+        int num_sta; /* number of stations in sta_list */
+        struct list_head sta_list;
+        struct list_head deleted_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;
+
+        int mc_count;   /* total count of multicast entries in all interfaces */
+        int iff_allmultis, iff_promiscs;
+                        /* number of interfaces with corresponding IFF_ flags */
+
+        struct rate_control_ref *rate_ctrl;
+
+        int next_mode; /* MODE_IEEE80211*
+                        * The mode preference for next channel change. This is
+                        * used to select .11g vs. .11b channels (or 4.9 GHz vs.
+                        * .11a) when the channel number is not unique. */
+
+        /* 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 cts_protect_erp_frames;
+        int fragmentation_threshold;
+        int short_retry_limit; /* dot11ShortRetryLimit */
+        int long_retry_limit; /* dot11LongRetryLimit */
+        int short_preamble; /* use short preamble with IEEE 802.11b */
+
+        struct crypto_blkcipher *wep_tx_tfm;
+        struct crypto_blkcipher *wep_rx_tfm;
+        u32 wep_iv;
+        int key_tx_rx_threshold; /* number of times any key can be used in TX
+                                  * or RX before generating a rekey
+                                  * notification; 0 = notification disabled. */
+
+        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;
+
+        rwlock_t sub_if_lock; /* Protects sub_if_list. Cannot be taken under
+                               * sta_bss_lock or sta_lock. */
+        struct list_head sub_if_list;
+        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;
+        char tx_led_name[32], rx_led_name[32];
+#endif
+
+        u32 channel_use;
+        u32 channel_use_raw;
+        u32 stat_time;
+        struct timer_list stat_timer;
+
+        enum {
+                STA_ANTENNA_SEL_AUTO = 0,
+                STA_ANTENNA_SEL_SW_CTRL = 1,
+                STA_ANTENNA_SEL_SW_CTRL_DEBUG = 2
+        } sta_antenna_sel;
+
+        int rate_ctrl_num_up, rate_ctrl_num_down;
+
+#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 default_wep_only; /* only default WEP keys are used with this
+                               * interface; this is used to decide when hwaccel
+                               * can be used with default keys */
+        int total_ps_buffered; /* total number of all buffered unicast and
+                                * multicast packets for power saving stations
+                                */
+        int allow_broadcast_always; /* whether to allow TX of broadcast frames
+                                     * even when there are no associated STAs
+                                     */
+
+        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_*) */
+
+        int user_space_mlme;
+};
+
+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, int aid)
+{
+        /*
+         * This format has ben 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, int aid)
+{
+        spin_lock_bh(&local->sta_lock);
+        __bss_tim_set(bss, aid);
+        spin_unlock_bh(&local->sta_lock);
+}
+
+static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, int aid)
+{
+        /*
+         * This format has ben 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, int aid)
+{
+        spin_lock_bh(&local->sta_lock);
+        __bss_tim_clear(bss, aid);
+        spin_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;
+}
+
+/* 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);
+struct ieee80211_key_conf *
+ieee80211_key_data2conf(struct ieee80211_local *local,
+                        const struct ieee80211_key *data);
+struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata,
+                                          int idx, size_t key_len, gfp_t flags);
+void ieee80211_key_free(struct ieee80211_key *key);
+void ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
+                       struct ieee80211_rx_status *status, u32 msg_type);
+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);
+void ieee80211_if_mgmt_setup(struct net_device *dev);
+int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
+                                 const char *name);
+struct net_device_stats *ieee80211_dev_stats(struct net_device *dev);
+
+/* ieee80211_ioctl.c */
+extern const struct iw_handler_def ieee80211_iw_handler_def;
+
+void ieee80211_update_default_wep_only(struct ieee80211_local *local);
+
+
+/* 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_init_client(struct net_device *dev);
+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);
+
+/* 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);
+int ieee80211_if_add_mgmt(struct ieee80211_local *local);
+void ieee80211_if_del_mgmt(struct ieee80211_local *local);
+
+/* for wiphy privid */
+extern void *mac80211_wiphy_privid;
+
+#endif /* IEEE80211_I_H */