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TOMOYO Linux Cross Reference
Linux/net/mac80211/ieee80211_i.h

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  1 /*
  2  * Copyright 2002-2005, Instant802 Networks, Inc.
  3  * Copyright 2005, Devicescape Software, Inc.
  4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
  5  * Copyright 2007-2010  Johannes Berg <johannes@sipsolutions.net>
  6  *
  7  * This program is free software; you can redistribute it and/or modify
  8  * it under the terms of the GNU General Public License version 2 as
  9  * published by the Free Software Foundation.
 10  */
 11 
 12 #ifndef IEEE80211_I_H
 13 #define IEEE80211_I_H
 14 
 15 #include <linux/kernel.h>
 16 #include <linux/device.h>
 17 #include <linux/if_ether.h>
 18 #include <linux/interrupt.h>
 19 #include <linux/list.h>
 20 #include <linux/netdevice.h>
 21 #include <linux/skbuff.h>
 22 #include <linux/workqueue.h>
 23 #include <linux/types.h>
 24 #include <linux/spinlock.h>
 25 #include <linux/etherdevice.h>
 26 #include <linux/leds.h>
 27 #include <linux/idr.h>
 28 #include <net/ieee80211_radiotap.h>
 29 #include <net/cfg80211.h>
 30 #include <net/mac80211.h>
 31 #include "key.h"
 32 #include "sta_info.h"
 33 #include "debug.h"
 34 
 35 struct ieee80211_local;
 36 
 37 /* Maximum number of broadcast/multicast frames to buffer when some of the
 38  * associated stations are using power saving. */
 39 #define AP_MAX_BC_BUFFER 128
 40 
 41 /* Maximum number of frames buffered to all STAs, including multicast frames.
 42  * Note: increasing this limit increases the potential memory requirement. Each
 43  * frame can be up to about 2 kB long. */
 44 #define TOTAL_MAX_TX_BUFFER 512
 45 
 46 /* Required encryption head and tailroom */
 47 #define IEEE80211_ENCRYPT_HEADROOM 8
 48 #define IEEE80211_ENCRYPT_TAILROOM 18
 49 
 50 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
 51  * reception of at least three fragmented frames. This limit can be increased
 52  * by changing this define, at the cost of slower frame reassembly and
 53  * increased memory use (about 2 kB of RAM per entry). */
 54 #define IEEE80211_FRAGMENT_MAX 4
 55 
 56 #define TU_TO_JIFFIES(x)        (usecs_to_jiffies((x) * 1024))
 57 #define TU_TO_EXP_TIME(x)       (jiffies + TU_TO_JIFFIES(x))
 58 
 59 /* power level hasn't been configured (or set to automatic) */
 60 #define IEEE80211_UNSET_POWER_LEVEL     INT_MIN
 61 
 62 /*
 63  * Some APs experience problems when working with U-APSD. Decrease the
 64  * probability of that happening by using legacy mode for all ACs but VO.
 65  * The AP that caused us trouble was a Cisco 4410N. It ignores our
 66  * setting, and always treats non-VO ACs as legacy.
 67  */
 68 #define IEEE80211_DEFAULT_UAPSD_QUEUES \
 69         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
 70 
 71 #define IEEE80211_DEFAULT_MAX_SP_LEN            \
 72         IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
 73 
 74 #define IEEE80211_DEAUTH_FRAME_LEN      (24 /* hdr */ + 2 /* reason */)
 75 
 76 struct ieee80211_fragment_entry {
 77         unsigned long first_frag_time;
 78         unsigned int seq;
 79         unsigned int rx_queue;
 80         unsigned int last_frag;
 81         unsigned int extra_len;
 82         struct sk_buff_head skb_list;
 83         int ccmp; /* Whether fragments were encrypted with CCMP */
 84         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
 85 };
 86 
 87 
 88 struct ieee80211_bss {
 89         u32 device_ts_beacon, device_ts_presp;
 90 
 91         bool wmm_used;
 92         bool uapsd_supported;
 93 
 94 #define IEEE80211_MAX_SUPP_RATES 32
 95         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 96         size_t supp_rates_len;
 97         struct ieee80211_rate *beacon_rate;
 98 
 99         /*
100          * During association, we save an ERP value from a probe response so
101          * that we can feed ERP info to the driver when handling the
102          * association completes. these fields probably won't be up-to-date
103          * otherwise, you probably don't want to use them.
104          */
105         bool has_erp_value;
106         u8 erp_value;
107 
108         /* Keep track of the corruption of the last beacon/probe response. */
109         u8 corrupt_data;
110 
111         /* Keep track of what bits of information we have valid info for. */
112         u8 valid_data;
113 };
114 
115 /**
116  * enum ieee80211_corrupt_data_flags - BSS data corruption flags
117  * @IEEE80211_BSS_CORRUPT_BEACON: last beacon frame received was corrupted
118  * @IEEE80211_BSS_CORRUPT_PROBE_RESP: last probe response received was corrupted
119  *
120  * These are bss flags that are attached to a bss in the
121  * @corrupt_data field of &struct ieee80211_bss.
122  */
123 enum ieee80211_bss_corrupt_data_flags {
124         IEEE80211_BSS_CORRUPT_BEACON            = BIT(0),
125         IEEE80211_BSS_CORRUPT_PROBE_RESP        = BIT(1)
126 };
127 
128 /**
129  * enum ieee80211_valid_data_flags - BSS valid data flags
130  * @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
131  * @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
132  * @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
133  *
134  * These are bss flags that are attached to a bss in the
135  * @valid_data field of &struct ieee80211_bss.  They show which parts
136  * of the data structure were recieved as a result of an un-corrupted
137  * beacon/probe response.
138  */
139 enum ieee80211_bss_valid_data_flags {
140         IEEE80211_BSS_VALID_WMM                 = BIT(1),
141         IEEE80211_BSS_VALID_RATES               = BIT(2),
142         IEEE80211_BSS_VALID_ERP                 = BIT(3)
143 };
144 
145 typedef unsigned __bitwise__ ieee80211_tx_result;
146 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
147 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
148 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
149 
150 #define IEEE80211_TX_UNICAST            BIT(1)
151 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
152 
153 struct ieee80211_tx_data {
154         struct sk_buff *skb;
155         struct sk_buff_head skbs;
156         struct ieee80211_local *local;
157         struct ieee80211_sub_if_data *sdata;
158         struct sta_info *sta;
159         struct ieee80211_key *key;
160         struct ieee80211_tx_rate rate;
161 
162         unsigned int flags;
163 };
164 
165 
166 typedef unsigned __bitwise__ ieee80211_rx_result;
167 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
168 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
169 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
170 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
171 
172 /**
173  * enum ieee80211_packet_rx_flags - packet RX flags
174  * @IEEE80211_RX_RA_MATCH: frame is destined to interface currently processed
175  *      (incl. multicast frames)
176  * @IEEE80211_RX_FRAGMENTED: fragmented frame
177  * @IEEE80211_RX_AMSDU: a-MSDU packet
178  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
179  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
180  *
181  * These are per-frame flags that are attached to a frame in the
182  * @rx_flags field of &struct ieee80211_rx_status.
183  */
184 enum ieee80211_packet_rx_flags {
185         IEEE80211_RX_RA_MATCH                   = BIT(1),
186         IEEE80211_RX_FRAGMENTED                 = BIT(2),
187         IEEE80211_RX_AMSDU                      = BIT(3),
188         IEEE80211_RX_MALFORMED_ACTION_FRM       = BIT(4),
189         IEEE80211_RX_DEFERRED_RELEASE           = BIT(5),
190 };
191 
192 /**
193  * enum ieee80211_rx_flags - RX data flags
194  *
195  * @IEEE80211_RX_CMNTR: received on cooked monitor already
196  * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
197  *      to cfg80211_report_obss_beacon().
198  *
199  * These flags are used across handling multiple interfaces
200  * for a single frame.
201  */
202 enum ieee80211_rx_flags {
203         IEEE80211_RX_CMNTR              = BIT(0),
204         IEEE80211_RX_BEACON_REPORTED    = BIT(1),
205 };
206 
207 struct ieee80211_rx_data {
208         struct sk_buff *skb;
209         struct ieee80211_local *local;
210         struct ieee80211_sub_if_data *sdata;
211         struct sta_info *sta;
212         struct ieee80211_key *key;
213 
214         unsigned int flags;
215 
216         /*
217          * Index into sequence numbers array, 0..16
218          * since the last (16) is used for non-QoS,
219          * will be 16 on non-QoS frames.
220          */
221         int seqno_idx;
222 
223         /*
224          * Index into the security IV/PN arrays, 0..16
225          * since the last (16) is used for CCMP-encrypted
226          * management frames, will be set to 16 on mgmt
227          * frames and 0 on non-QoS frames.
228          */
229         int security_idx;
230 
231         u32 tkip_iv32;
232         u16 tkip_iv16;
233 };
234 
235 struct beacon_data {
236         u8 *head, *tail;
237         int head_len, tail_len;
238         struct rcu_head rcu_head;
239 };
240 
241 struct probe_resp {
242         struct rcu_head rcu_head;
243         int len;
244         u8 data[0];
245 };
246 
247 struct ps_data {
248         /* yes, this looks ugly, but guarantees that we can later use
249          * bitmap_empty :)
250          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
251         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
252         struct sk_buff_head bc_buf;
253         atomic_t num_sta_ps; /* number of stations in PS mode */
254         int dtim_count;
255         bool dtim_bc_mc;
256 };
257 
258 struct ieee80211_if_ap {
259         struct beacon_data __rcu *beacon;
260         struct probe_resp __rcu *probe_resp;
261 
262         struct list_head vlans;
263 
264         struct ps_data ps;
265         atomic_t num_mcast_sta; /* number of stations receiving multicast */
266 };
267 
268 struct ieee80211_if_wds {
269         struct sta_info *sta;
270         u8 remote_addr[ETH_ALEN];
271 };
272 
273 struct ieee80211_if_vlan {
274         struct list_head list;
275 
276         /* used for all tx if the VLAN is configured to 4-addr mode */
277         struct sta_info __rcu *sta;
278 };
279 
280 struct mesh_stats {
281         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
282         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
283         __u32 fwded_frames;             /* Mesh total forwarded frames */
284         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
285         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
286         __u32 dropped_frames_congestion;/* Not forwarded due to congestion */
287 };
288 
289 #define PREQ_Q_F_START          0x1
290 #define PREQ_Q_F_REFRESH        0x2
291 struct mesh_preq_queue {
292         struct list_head list;
293         u8 dst[ETH_ALEN];
294         u8 flags;
295 };
296 
297 #if HZ/100 == 0
298 #define IEEE80211_ROC_MIN_LEFT  1
299 #else
300 #define IEEE80211_ROC_MIN_LEFT  (HZ/100)
301 #endif
302 
303 struct ieee80211_roc_work {
304         struct list_head list;
305         struct list_head dependents;
306 
307         struct delayed_work work;
308 
309         struct ieee80211_sub_if_data *sdata;
310 
311         struct ieee80211_channel *chan;
312 
313         bool started, abort, hw_begun, notified;
314         bool to_be_freed;
315 
316         unsigned long hw_start_time;
317 
318         u32 duration, req_duration;
319         struct sk_buff *frame;
320         u64 cookie, mgmt_tx_cookie;
321         enum ieee80211_roc_type type;
322 };
323 
324 /* flags used in struct ieee80211_if_managed.flags */
325 enum ieee80211_sta_flags {
326         IEEE80211_STA_BEACON_POLL       = BIT(0),
327         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
328         IEEE80211_STA_CONTROL_PORT      = BIT(2),
329         IEEE80211_STA_DISABLE_HT        = BIT(4),
330         IEEE80211_STA_CSA_RECEIVED      = BIT(5),
331         IEEE80211_STA_MFP_ENABLED       = BIT(6),
332         IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
333         IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
334         IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
335         IEEE80211_STA_DISABLE_40MHZ     = BIT(10),
336         IEEE80211_STA_DISABLE_VHT       = BIT(11),
337         IEEE80211_STA_DISABLE_80P80MHZ  = BIT(12),
338         IEEE80211_STA_DISABLE_160MHZ    = BIT(13),
339 };
340 
341 struct ieee80211_mgd_auth_data {
342         struct cfg80211_bss *bss;
343         unsigned long timeout;
344         int tries;
345         u16 algorithm, expected_transaction;
346 
347         u8 key[WLAN_KEY_LEN_WEP104];
348         u8 key_len, key_idx;
349         bool done;
350         bool timeout_started;
351 
352         u16 sae_trans, sae_status;
353         size_t data_len;
354         u8 data[];
355 };
356 
357 struct ieee80211_mgd_assoc_data {
358         struct cfg80211_bss *bss;
359         const u8 *supp_rates;
360 
361         unsigned long timeout;
362         int tries;
363 
364         u16 capability;
365         u8 prev_bssid[ETH_ALEN];
366         u8 ssid[IEEE80211_MAX_SSID_LEN];
367         u8 ssid_len;
368         u8 supp_rates_len;
369         bool wmm, uapsd;
370         bool need_beacon;
371         bool synced;
372         bool timeout_started;
373 
374         u8 ap_ht_param;
375 
376         struct ieee80211_vht_cap ap_vht_cap;
377 
378         size_t ie_len;
379         u8 ie[];
380 };
381 
382 struct ieee80211_if_managed {
383         struct timer_list timer;
384         struct timer_list conn_mon_timer;
385         struct timer_list bcn_mon_timer;
386         struct timer_list chswitch_timer;
387         struct work_struct monitor_work;
388         struct work_struct chswitch_work;
389         struct work_struct beacon_connection_loss_work;
390         struct work_struct csa_connection_drop_work;
391 
392         unsigned long beacon_timeout;
393         unsigned long probe_timeout;
394         int probe_send_count;
395         bool nullfunc_failed;
396         bool connection_loss;
397 
398         struct cfg80211_bss *associated;
399         struct ieee80211_mgd_auth_data *auth_data;
400         struct ieee80211_mgd_assoc_data *assoc_data;
401 
402         u8 bssid[ETH_ALEN];
403 
404         u16 aid;
405 
406         bool powersave; /* powersave requested for this iface */
407         bool broken_ap; /* AP is broken -- turn off powersave */
408         bool have_beacon;
409         u8 dtim_period;
410         enum ieee80211_smps_mode req_smps, /* requested smps mode */
411                                  driver_smps_mode; /* smps mode request */
412 
413         struct work_struct request_smps_work;
414 
415         unsigned int flags;
416 
417         bool beacon_crc_valid;
418         u32 beacon_crc;
419 
420         bool status_acked;
421         bool status_received;
422         __le16 status_fc;
423 
424         enum {
425                 IEEE80211_MFP_DISABLED,
426                 IEEE80211_MFP_OPTIONAL,
427                 IEEE80211_MFP_REQUIRED
428         } mfp; /* management frame protection */
429 
430         /*
431          * Bitmask of enabled u-apsd queues,
432          * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
433          * to take effect.
434          */
435         unsigned int uapsd_queues;
436 
437         /*
438          * Maximum number of buffered frames AP can deliver during a
439          * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
440          * Needs a new association to take effect.
441          */
442         unsigned int uapsd_max_sp_len;
443 
444         int wmm_last_param_set;
445 
446         u8 use_4addr;
447 
448         s16 p2p_noa_index;
449 
450         /* Signal strength from the last Beacon frame in the current BSS. */
451         int last_beacon_signal;
452 
453         /*
454          * Weighted average of the signal strength from Beacon frames in the
455          * current BSS. This is in units of 1/16 of the signal unit to maintain
456          * accuracy and to speed up calculations, i.e., the value need to be
457          * divided by 16 to get the actual value.
458          */
459         int ave_beacon_signal;
460 
461         /*
462          * Number of Beacon frames used in ave_beacon_signal. This can be used
463          * to avoid generating less reliable cqm events that would be based
464          * only on couple of received frames.
465          */
466         unsigned int count_beacon_signal;
467 
468         /*
469          * Last Beacon frame signal strength average (ave_beacon_signal / 16)
470          * that triggered a cqm event. 0 indicates that no event has been
471          * generated for the current association.
472          */
473         int last_cqm_event_signal;
474 
475         /*
476          * State variables for keeping track of RSSI of the AP currently
477          * connected to and informing driver when RSSI has gone
478          * below/above a certain threshold.
479          */
480         int rssi_min_thold, rssi_max_thold;
481         int last_ave_beacon_signal;
482 
483         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
484         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
485         struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
486         struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
487 };
488 
489 struct ieee80211_if_ibss {
490         struct timer_list timer;
491 
492         unsigned long last_scan_completed;
493 
494         u32 basic_rates;
495 
496         bool fixed_bssid;
497         bool fixed_channel;
498         bool privacy;
499 
500         bool control_port;
501 
502         u8 bssid[ETH_ALEN] __aligned(2);
503         u8 ssid[IEEE80211_MAX_SSID_LEN];
504         u8 ssid_len, ie_len;
505         u8 *ie;
506         struct cfg80211_chan_def chandef;
507 
508         unsigned long ibss_join_req;
509         /* probe response/beacon for IBSS */
510         struct beacon_data __rcu *presp;
511 
512         spinlock_t incomplete_lock;
513         struct list_head incomplete_stations;
514 
515         enum {
516                 IEEE80211_IBSS_MLME_SEARCH,
517                 IEEE80211_IBSS_MLME_JOINED,
518         } state;
519 };
520 
521 /**
522  * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
523  *
524  * these declarations define the interface, which enables
525  * vendor-specific mesh synchronization
526  *
527  */
528 struct ieee802_11_elems;
529 struct ieee80211_mesh_sync_ops {
530         void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata,
531                              u16 stype,
532                              struct ieee80211_mgmt *mgmt,
533                              struct ieee802_11_elems *elems,
534                              struct ieee80211_rx_status *rx_status);
535         void (*adjust_tbtt)(struct ieee80211_sub_if_data *sdata);
536         /* add other framework functions here */
537 };
538 
539 struct ieee80211_if_mesh {
540         struct timer_list housekeeping_timer;
541         struct timer_list mesh_path_timer;
542         struct timer_list mesh_path_root_timer;
543 
544         unsigned long wrkq_flags;
545         unsigned long mbss_changed;
546 
547         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
548         size_t mesh_id_len;
549         /* Active Path Selection Protocol Identifier */
550         u8 mesh_pp_id;
551         /* Active Path Selection Metric Identifier */
552         u8 mesh_pm_id;
553         /* Congestion Control Mode Identifier */
554         u8 mesh_cc_id;
555         /* Synchronization Protocol Identifier */
556         u8 mesh_sp_id;
557         /* Authentication Protocol Identifier */
558         u8 mesh_auth_id;
559         /* Local mesh Sequence Number */
560         u32 sn;
561         /* Last used PREQ ID */
562         u32 preq_id;
563         atomic_t mpaths;
564         /* Timestamp of last SN update */
565         unsigned long last_sn_update;
566         /* Time when it's ok to send next PERR */
567         unsigned long next_perr;
568         /* Timestamp of last PREQ sent */
569         unsigned long last_preq;
570         struct mesh_rmc *rmc;
571         spinlock_t mesh_preq_queue_lock;
572         struct mesh_preq_queue preq_queue;
573         int preq_queue_len;
574         struct mesh_stats mshstats;
575         struct mesh_config mshcfg;
576         atomic_t estab_plinks;
577         u32 mesh_seqnum;
578         bool accepting_plinks;
579         int num_gates;
580         struct beacon_data __rcu *beacon;
581         const u8 *ie;
582         u8 ie_len;
583         enum {
584                 IEEE80211_MESH_SEC_NONE = 0x0,
585                 IEEE80211_MESH_SEC_AUTHED = 0x1,
586                 IEEE80211_MESH_SEC_SECURED = 0x2,
587         } security;
588         bool user_mpm;
589         /* Extensible Synchronization Framework */
590         const struct ieee80211_mesh_sync_ops *sync_ops;
591         s64 sync_offset_clockdrift_max;
592         spinlock_t sync_offset_lock;
593         bool adjusting_tbtt;
594         /* mesh power save */
595         enum nl80211_mesh_power_mode nonpeer_pm;
596         int ps_peers_light_sleep;
597         int ps_peers_deep_sleep;
598         struct ps_data ps;
599 };
600 
601 #ifdef CONFIG_MAC80211_MESH
602 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
603         do { (msh)->mshstats.name++; } while (0)
604 #else
605 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
606         do { } while (0)
607 #endif
608 
609 /**
610  * enum ieee80211_sub_if_data_flags - virtual interface flags
611  *
612  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
613  * @IEEE80211_SDATA_PROMISC: interface is promisc
614  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
615  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
616  *      associated stations and deliver multicast frames both
617  *      back to wireless media and to the local net stack.
618  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
619  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
620  */
621 enum ieee80211_sub_if_data_flags {
622         IEEE80211_SDATA_ALLMULTI                = BIT(0),
623         IEEE80211_SDATA_PROMISC                 = BIT(1),
624         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
625         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
626         IEEE80211_SDATA_DISCONNECT_RESUME       = BIT(4),
627         IEEE80211_SDATA_IN_DRIVER               = BIT(5),
628 };
629 
630 /**
631  * enum ieee80211_sdata_state_bits - virtual interface state bits
632  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
633  *      mirrors netif_running() but is separate for interface type
634  *      change handling while the interface is up
635  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
636  *      mode, so queues are stopped
637  * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
638  *      to offchannel, reset when offchannel returns
639  */
640 enum ieee80211_sdata_state_bits {
641         SDATA_STATE_RUNNING,
642         SDATA_STATE_OFFCHANNEL,
643         SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
644 };
645 
646 /**
647  * enum ieee80211_chanctx_mode - channel context configuration mode
648  *
649  * @IEEE80211_CHANCTX_SHARED: channel context may be used by
650  *      multiple interfaces
651  * @IEEE80211_CHANCTX_EXCLUSIVE: channel context can be used
652  *      only by a single interface. This can be used for example for
653  *      non-fixed channel IBSS.
654  */
655 enum ieee80211_chanctx_mode {
656         IEEE80211_CHANCTX_SHARED,
657         IEEE80211_CHANCTX_EXCLUSIVE
658 };
659 
660 struct ieee80211_chanctx {
661         struct list_head list;
662         struct rcu_head rcu_head;
663 
664         enum ieee80211_chanctx_mode mode;
665         int refcount;
666         bool driver_present;
667 
668         struct ieee80211_chanctx_conf conf;
669 };
670 
671 struct ieee80211_sub_if_data {
672         struct list_head list;
673 
674         struct wireless_dev wdev;
675 
676         /* keys */
677         struct list_head key_list;
678 
679         /* count for keys needing tailroom space allocation */
680         int crypto_tx_tailroom_needed_cnt;
681         int crypto_tx_tailroom_pending_dec;
682         struct delayed_work dec_tailroom_needed_wk;
683 
684         struct net_device *dev;
685         struct ieee80211_local *local;
686 
687         unsigned int flags;
688 
689         unsigned long state;
690 
691         int drop_unencrypted;
692 
693         char name[IFNAMSIZ];
694 
695         /* Fragment table for host-based reassembly */
696         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
697         unsigned int fragment_next;
698 
699         /* TID bitmap for NoAck policy */
700         u16 noack_map;
701 
702         /* bit field of ACM bits (BIT(802.1D tag)) */
703         u8 wmm_acm;
704 
705         struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
706         struct ieee80211_key __rcu *default_unicast_key;
707         struct ieee80211_key __rcu *default_multicast_key;
708         struct ieee80211_key __rcu *default_mgmt_key;
709 
710         u16 sequence_number;
711         __be16 control_port_protocol;
712         bool control_port_no_encrypt;
713 
714         struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
715 
716         /* used to reconfigure hardware SM PS */
717         struct work_struct recalc_smps;
718 
719         struct work_struct work;
720         struct sk_buff_head skb_queue;
721 
722         u8 needed_rx_chains;
723         enum ieee80211_smps_mode smps_mode;
724 
725         int user_power_level; /* in dBm */
726         int ap_power_level; /* in dBm */
727 
728         bool radar_required;
729         struct delayed_work dfs_cac_timer_work;
730 
731         /*
732          * AP this belongs to: self in AP mode and
733          * corresponding AP in VLAN mode, NULL for
734          * all others (might be needed later in IBSS)
735          */
736         struct ieee80211_if_ap *bss;
737 
738         /* bitmap of allowed (non-MCS) rate indexes for rate control */
739         u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
740 
741         bool rc_has_mcs_mask[IEEE80211_NUM_BANDS];
742         u8  rc_rateidx_mcs_mask[IEEE80211_NUM_BANDS][IEEE80211_HT_MCS_MASK_LEN];
743 
744         union {
745                 struct ieee80211_if_ap ap;
746                 struct ieee80211_if_wds wds;
747                 struct ieee80211_if_vlan vlan;
748                 struct ieee80211_if_managed mgd;
749                 struct ieee80211_if_ibss ibss;
750                 struct ieee80211_if_mesh mesh;
751                 u32 mntr_flags;
752         } u;
753 
754         spinlock_t cleanup_stations_lock;
755         struct list_head cleanup_stations;
756         struct work_struct cleanup_stations_wk;
757 
758 #ifdef CONFIG_MAC80211_DEBUGFS
759         struct {
760                 struct dentry *subdir_stations;
761                 struct dentry *default_unicast_key;
762                 struct dentry *default_multicast_key;
763                 struct dentry *default_mgmt_key;
764         } debugfs;
765 #endif
766 
767         /* must be last, dynamically sized area in this! */
768         struct ieee80211_vif vif;
769 };
770 
771 static inline
772 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
773 {
774         return container_of(p, struct ieee80211_sub_if_data, vif);
775 }
776 
777 static inline void sdata_lock(struct ieee80211_sub_if_data *sdata)
778         __acquires(&sdata->wdev.mtx)
779 {
780         mutex_lock(&sdata->wdev.mtx);
781         __acquire(&sdata->wdev.mtx);
782 }
783 
784 static inline void sdata_unlock(struct ieee80211_sub_if_data *sdata)
785         __releases(&sdata->wdev.mtx)
786 {
787         mutex_unlock(&sdata->wdev.mtx);
788         __release(&sdata->wdev.mtx);
789 }
790 
791 static inline void
792 sdata_assert_lock(struct ieee80211_sub_if_data *sdata)
793 {
794         lockdep_assert_held(&sdata->wdev.mtx);
795 }
796 
797 static inline enum ieee80211_band
798 ieee80211_get_sdata_band(struct ieee80211_sub_if_data *sdata)
799 {
800         enum ieee80211_band band = IEEE80211_BAND_2GHZ;
801         struct ieee80211_chanctx_conf *chanctx_conf;
802 
803         rcu_read_lock();
804         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
805         if (!WARN_ON(!chanctx_conf))
806                 band = chanctx_conf->def.chan->band;
807         rcu_read_unlock();
808 
809         return band;
810 }
811 
812 enum sdata_queue_type {
813         IEEE80211_SDATA_QUEUE_TYPE_FRAME        = 0,
814         IEEE80211_SDATA_QUEUE_AGG_START         = 1,
815         IEEE80211_SDATA_QUEUE_AGG_STOP          = 2,
816 };
817 
818 enum {
819         IEEE80211_RX_MSG        = 1,
820         IEEE80211_TX_STATUS_MSG = 2,
821 };
822 
823 enum queue_stop_reason {
824         IEEE80211_QUEUE_STOP_REASON_DRIVER,
825         IEEE80211_QUEUE_STOP_REASON_PS,
826         IEEE80211_QUEUE_STOP_REASON_CSA,
827         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
828         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
829         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
830         IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
831         IEEE80211_QUEUE_STOP_REASON_FLUSH,
832 };
833 
834 #ifdef CONFIG_MAC80211_LEDS
835 struct tpt_led_trigger {
836         struct led_trigger trig;
837         char name[32];
838         const struct ieee80211_tpt_blink *blink_table;
839         unsigned int blink_table_len;
840         struct timer_list timer;
841         unsigned long prev_traffic;
842         unsigned long tx_bytes, rx_bytes;
843         unsigned int active, want;
844         bool running;
845 };
846 #endif
847 
848 /**
849  * mac80211 scan flags - currently active scan mode
850  *
851  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
852  *      well be on the operating channel
853  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
854  *      determine if we are on the operating channel or not
855  * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
856  *      channel. This should not interrupt normal traffic.
857  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
858  *      that the scan completed.
859  * @SCAN_ABORTED: Set for our scan work function when the driver reported
860  *      a scan complete for an aborted scan.
861  * @SCAN_HW_CANCELLED: Set for our scan work function when the scan is being
862  *      cancelled.
863  */
864 enum {
865         SCAN_SW_SCANNING,
866         SCAN_HW_SCANNING,
867         SCAN_ONCHANNEL_SCANNING,
868         SCAN_COMPLETED,
869         SCAN_ABORTED,
870         SCAN_HW_CANCELLED,
871 };
872 
873 /**
874  * enum mac80211_scan_state - scan state machine states
875  *
876  * @SCAN_DECISION: Main entry point to the scan state machine, this state
877  *      determines if we should keep on scanning or switch back to the
878  *      operating channel
879  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
880  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
881  * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
882  *      send out data
883  * @SCAN_RESUME: Resume the scan and scan the next channel
884  * @SCAN_ABORT: Abort the scan and go back to operating channel
885  */
886 enum mac80211_scan_state {
887         SCAN_DECISION,
888         SCAN_SET_CHANNEL,
889         SCAN_SEND_PROBE,
890         SCAN_SUSPEND,
891         SCAN_RESUME,
892         SCAN_ABORT,
893 };
894 
895 struct ieee80211_local {
896         /* embed the driver visible part.
897          * don't cast (use the static inlines below), but we keep
898          * it first anyway so they become a no-op */
899         struct ieee80211_hw hw;
900 
901         const struct ieee80211_ops *ops;
902 
903         /*
904          * private workqueue to mac80211. mac80211 makes this accessible
905          * via ieee80211_queue_work()
906          */
907         struct workqueue_struct *workqueue;
908 
909         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
910         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
911         spinlock_t queue_stop_reason_lock;
912 
913         int open_count;
914         int monitors, cooked_mntrs;
915         /* number of interfaces with corresponding FIF_ flags */
916         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
917             fif_probe_req;
918         int probe_req_reg;
919         unsigned int filter_flags; /* FIF_* */
920 
921         bool wiphy_ciphers_allocated;
922 
923         bool use_chanctx;
924 
925         /* protects the aggregated multicast list and filter calls */
926         spinlock_t filter_lock;
927 
928         /* used for uploading changed mc list */
929         struct work_struct reconfig_filter;
930 
931         /* aggregated multicast list */
932         struct netdev_hw_addr_list mc_list;
933 
934         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
935 
936         /*
937          * suspended is true if we finished all the suspend _and_ we have
938          * not yet come up from resume. This is to be used by mac80211
939          * to ensure driver sanity during suspend and mac80211's own
940          * sanity. It can eventually be used for WoW as well.
941          */
942         bool suspended;
943 
944         /*
945          * Resuming is true while suspended, but when we're reprogramming the
946          * hardware -- at that time it's allowed to use ieee80211_queue_work()
947          * again even though some other parts of the stack are still suspended
948          * and we still drop received frames to avoid waking the stack.
949          */
950         bool resuming;
951 
952         /*
953          * quiescing is true during the suspend process _only_ to
954          * ease timer cancelling etc.
955          */
956         bool quiescing;
957 
958         /* device is started */
959         bool started;
960 
961         /* device is during a HW reconfig */
962         bool in_reconfig;
963 
964         /* wowlan is enabled -- don't reconfig on resume */
965         bool wowlan;
966 
967         /* DFS/radar detection is enabled */
968         bool radar_detect_enabled;
969         struct work_struct radar_detected_work;
970 
971         /* number of RX chains the hardware has */
972         u8 rx_chains;
973 
974         int tx_headroom; /* required headroom for hardware/radiotap */
975 
976         /* Tasklet and skb queue to process calls from IRQ mode. All frames
977          * added to skb_queue will be processed, but frames in
978          * skb_queue_unreliable may be dropped if the total length of these
979          * queues increases over the limit. */
980 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
981         struct tasklet_struct tasklet;
982         struct sk_buff_head skb_queue;
983         struct sk_buff_head skb_queue_unreliable;
984 
985         spinlock_t rx_path_lock;
986 
987         /* Station data */
988         /*
989          * The mutex only protects the list, hash table and
990          * counter, reads are done with RCU.
991          */
992         struct mutex sta_mtx;
993         spinlock_t tim_lock;
994         unsigned long num_sta;
995         struct list_head sta_list;
996         struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
997         struct timer_list sta_cleanup;
998         int sta_generation;
999 
1000         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
1001         struct tasklet_struct tx_pending_tasklet;
1002 
1003         atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
1004 
1005         /* number of interfaces with corresponding IFF_ flags */
1006         atomic_t iff_allmultis, iff_promiscs;
1007 
1008         struct rate_control_ref *rate_ctrl;
1009 
1010         struct crypto_cipher *wep_tx_tfm;
1011         struct crypto_cipher *wep_rx_tfm;
1012         u32 wep_iv;
1013 
1014         /* see iface.c */
1015         struct list_head interfaces;
1016         struct mutex iflist_mtx;
1017 
1018         /*
1019          * Key mutex, protects sdata's key_list and sta_info's
1020          * key pointers (write access, they're RCU.)
1021          */
1022         struct mutex key_mtx;
1023 
1024         /* mutex for scan and work locking */
1025         struct mutex mtx;
1026 
1027         /* Scanning and BSS list */
1028         unsigned long scanning;
1029         struct cfg80211_ssid scan_ssid;
1030         struct cfg80211_scan_request *int_scan_req;
1031         struct cfg80211_scan_request *scan_req, *hw_scan_req;
1032         struct ieee80211_channel *scan_channel;
1033         enum ieee80211_band hw_scan_band;
1034         int scan_channel_idx;
1035         int scan_ies_len;
1036         int hw_scan_ies_bufsize;
1037 
1038         struct work_struct sched_scan_stopped_work;
1039         struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
1040 
1041         unsigned long leave_oper_channel_time;
1042         enum mac80211_scan_state next_scan_state;
1043         struct delayed_work scan_work;
1044         struct ieee80211_sub_if_data __rcu *scan_sdata;
1045         struct cfg80211_chan_def csa_chandef;
1046         /* For backward compatibility only -- do not use */
1047         struct cfg80211_chan_def _oper_chandef;
1048 
1049         /* Temporary remain-on-channel for off-channel operations */
1050         struct ieee80211_channel *tmp_channel;
1051 
1052         /* channel contexts */
1053         struct list_head chanctx_list;
1054         struct mutex chanctx_mtx;
1055 
1056         /* SNMP counters */
1057         /* dot11CountersTable */
1058         u32 dot11TransmittedFragmentCount;
1059         u32 dot11MulticastTransmittedFrameCount;
1060         u32 dot11FailedCount;
1061         u32 dot11RetryCount;
1062         u32 dot11MultipleRetryCount;
1063         u32 dot11FrameDuplicateCount;
1064         u32 dot11ReceivedFragmentCount;
1065         u32 dot11MulticastReceivedFrameCount;
1066         u32 dot11TransmittedFrameCount;
1067 
1068 #ifdef CONFIG_MAC80211_LEDS
1069         int tx_led_counter, rx_led_counter;
1070         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
1071         struct tpt_led_trigger *tpt_led_trigger;
1072         char tx_led_name[32], rx_led_name[32],
1073              assoc_led_name[32], radio_led_name[32];
1074 #endif
1075 
1076 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
1077         /* TX/RX handler statistics */
1078         unsigned int tx_handlers_drop;
1079         unsigned int tx_handlers_queued;
1080         unsigned int tx_handlers_drop_unencrypted;
1081         unsigned int tx_handlers_drop_fragment;
1082         unsigned int tx_handlers_drop_wep;
1083         unsigned int tx_handlers_drop_not_assoc;
1084         unsigned int tx_handlers_drop_unauth_port;
1085         unsigned int rx_handlers_drop;
1086         unsigned int rx_handlers_queued;
1087         unsigned int rx_handlers_drop_nullfunc;
1088         unsigned int rx_handlers_drop_defrag;
1089         unsigned int rx_handlers_drop_short;
1090         unsigned int tx_expand_skb_head;
1091         unsigned int tx_expand_skb_head_cloned;
1092         unsigned int rx_expand_skb_head;
1093         unsigned int rx_expand_skb_head2;
1094         unsigned int rx_handlers_fragments;
1095         unsigned int tx_status_drop;
1096 #define I802_DEBUG_INC(c) (c)++
1097 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
1098 #define I802_DEBUG_INC(c) do { } while (0)
1099 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
1100 
1101 
1102         int total_ps_buffered; /* total number of all buffered unicast and
1103                                 * multicast packets for power saving stations
1104                                 */
1105 
1106         bool pspolling;
1107         bool offchannel_ps_enabled;
1108         /*
1109          * PS can only be enabled when we have exactly one managed
1110          * interface (and monitors) in PS, this then points there.
1111          */
1112         struct ieee80211_sub_if_data *ps_sdata;
1113         struct work_struct dynamic_ps_enable_work;
1114         struct work_struct dynamic_ps_disable_work;
1115         struct timer_list dynamic_ps_timer;
1116         struct notifier_block network_latency_notifier;
1117         struct notifier_block ifa_notifier;
1118         struct notifier_block ifa6_notifier;
1119 
1120         /*
1121          * The dynamic ps timeout configured from user space via WEXT -
1122          * this will override whatever chosen by mac80211 internally.
1123          */
1124         int dynamic_ps_forced_timeout;
1125 
1126         int user_power_level; /* in dBm, for all interfaces */
1127 
1128         enum ieee80211_smps_mode smps_mode;
1129 
1130         struct work_struct restart_work;
1131 
1132 #ifdef CONFIG_MAC80211_DEBUGFS
1133         struct local_debugfsdentries {
1134                 struct dentry *rcdir;
1135                 struct dentry *keys;
1136         } debugfs;
1137 #endif
1138 
1139         /*
1140          * Remain-on-channel support
1141          */
1142         struct list_head roc_list;
1143         struct work_struct hw_roc_start, hw_roc_done;
1144         unsigned long hw_roc_start_time;
1145         u64 roc_cookie_counter;
1146 
1147         struct idr ack_status_frames;
1148         spinlock_t ack_status_lock;
1149 
1150         struct ieee80211_sub_if_data __rcu *p2p_sdata;
1151 
1152         /* virtual monitor interface */
1153         struct ieee80211_sub_if_data __rcu *monitor_sdata;
1154         struct cfg80211_chan_def monitor_chandef;
1155 };
1156 
1157 static inline struct ieee80211_sub_if_data *
1158 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1159 {
1160         return netdev_priv(dev);
1161 }
1162 
1163 static inline struct ieee80211_sub_if_data *
1164 IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev *wdev)
1165 {
1166         return container_of(wdev, struct ieee80211_sub_if_data, wdev);
1167 }
1168 
1169 /* this struct represents 802.11n's RA/TID combination */
1170 struct ieee80211_ra_tid {
1171         u8 ra[ETH_ALEN];
1172         u16 tid;
1173 };
1174 
1175 /* Parsed Information Elements */
1176 struct ieee802_11_elems {
1177         const u8 *ie_start;
1178         size_t total_len;
1179 
1180         /* pointers to IEs */
1181         const u8 *ssid;
1182         const u8 *supp_rates;
1183         const u8 *ds_params;
1184         const struct ieee80211_tim_ie *tim;
1185         const u8 *challenge;
1186         const u8 *rsn;
1187         const u8 *erp_info;
1188         const u8 *ext_supp_rates;
1189         const u8 *wmm_info;
1190         const u8 *wmm_param;
1191         const struct ieee80211_ht_cap *ht_cap_elem;
1192         const struct ieee80211_ht_operation *ht_operation;
1193         const struct ieee80211_vht_cap *vht_cap_elem;
1194         const struct ieee80211_vht_operation *vht_operation;
1195         const struct ieee80211_meshconf_ie *mesh_config;
1196         const u8 *mesh_id;
1197         const u8 *peering;
1198         const __le16 *awake_window;
1199         const u8 *preq;
1200         const u8 *prep;
1201         const u8 *perr;
1202         const struct ieee80211_rann_ie *rann;
1203         const struct ieee80211_channel_sw_ie *ch_switch_ie;
1204         const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
1205         const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1206         const u8 *country_elem;
1207         const u8 *pwr_constr_elem;
1208         const struct ieee80211_timeout_interval_ie *timeout_int;
1209         const u8 *opmode_notif;
1210         const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1211 
1212         /* length of them, respectively */
1213         u8 ssid_len;
1214         u8 supp_rates_len;
1215         u8 tim_len;
1216         u8 challenge_len;
1217         u8 rsn_len;
1218         u8 ext_supp_rates_len;
1219         u8 wmm_info_len;
1220         u8 wmm_param_len;
1221         u8 mesh_id_len;
1222         u8 peering_len;
1223         u8 preq_len;
1224         u8 prep_len;
1225         u8 perr_len;
1226         u8 country_elem_len;
1227 
1228         /* whether a parse error occurred while retrieving these elements */
1229         bool parse_error;
1230 };
1231 
1232 static inline struct ieee80211_local *hw_to_local(
1233         struct ieee80211_hw *hw)
1234 {
1235         return container_of(hw, struct ieee80211_local, hw);
1236 }
1237 
1238 
1239 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1240 {
1241         return ether_addr_equal(raddr, addr) ||
1242                is_broadcast_ether_addr(raddr);
1243 }
1244 
1245 static inline bool
1246 ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
1247 {
1248         WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
1249                      status->flag & RX_FLAG_MACTIME_END);
1250         return status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END);
1251 }
1252 
1253 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
1254                                      struct ieee80211_rx_status *status,
1255                                      unsigned int mpdu_len,
1256                                      unsigned int mpdu_offset);
1257 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1258 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1259 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1260                                       u32 changed);
1261 void ieee80211_configure_filter(struct ieee80211_local *local);
1262 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1263 
1264 /* STA code */
1265 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1266 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1267                        struct cfg80211_auth_request *req);
1268 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1269                         struct cfg80211_assoc_request *req);
1270 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1271                          struct cfg80211_deauth_request *req);
1272 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1273                            struct cfg80211_disassoc_request *req);
1274 void ieee80211_send_pspoll(struct ieee80211_local *local,
1275                            struct ieee80211_sub_if_data *sdata);
1276 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1277 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata);
1278 int ieee80211_max_network_latency(struct notifier_block *nb,
1279                                   unsigned long data, void *dummy);
1280 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1281 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1282 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1283                                   struct sk_buff *skb);
1284 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1285 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1286 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
1287 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
1288                                   __le16 fc, bool acked);
1289 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1290 
1291 /* IBSS code */
1292 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1293 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1294 void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1295                               const u8 *bssid, const u8 *addr, u32 supp_rates);
1296 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1297                         struct cfg80211_ibss_params *params);
1298 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1299 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1300 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1301                                    struct sk_buff *skb);
1302 
1303 /* mesh code */
1304 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1305 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1306                                    struct sk_buff *skb);
1307 
1308 /* scan/BSS handling */
1309 void ieee80211_scan_work(struct work_struct *work);
1310 int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
1311                                 const u8 *ssid, u8 ssid_len,
1312                                 struct ieee80211_channel *chan);
1313 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1314                            struct cfg80211_scan_request *req);
1315 void ieee80211_scan_cancel(struct ieee80211_local *local);
1316 void ieee80211_run_deferred_scan(struct ieee80211_local *local);
1317 void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb);
1318 
1319 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1320 struct ieee80211_bss *
1321 ieee80211_bss_info_update(struct ieee80211_local *local,
1322                           struct ieee80211_rx_status *rx_status,
1323                           struct ieee80211_mgmt *mgmt,
1324                           size_t len,
1325                           struct ieee802_11_elems *elems,
1326                           struct ieee80211_channel *channel);
1327 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1328                           struct ieee80211_bss *bss);
1329 
1330 /* scheduled scan handling */
1331 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1332                                        struct cfg80211_sched_scan_request *req);
1333 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1334 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1335 
1336 /* off-channel helpers */
1337 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
1338 void ieee80211_offchannel_return(struct ieee80211_local *local);
1339 void ieee80211_roc_setup(struct ieee80211_local *local);
1340 void ieee80211_start_next_roc(struct ieee80211_local *local);
1341 void ieee80211_roc_purge(struct ieee80211_local *local,
1342                          struct ieee80211_sub_if_data *sdata);
1343 void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc, bool free);
1344 void ieee80211_sw_roc_work(struct work_struct *work);
1345 void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
1346 
1347 /* interface handling */
1348 int ieee80211_iface_init(void);
1349 void ieee80211_iface_exit(void);
1350 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1351                      struct wireless_dev **new_wdev, enum nl80211_iftype type,
1352                      struct vif_params *params);
1353 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1354                              enum nl80211_iftype type);
1355 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1356 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1357 u32 ieee80211_idle_off(struct ieee80211_local *local);
1358 void ieee80211_recalc_idle(struct ieee80211_local *local);
1359 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1360                                     const int offset);
1361 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
1362 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
1363 int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
1364 void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
1365 
1366 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1367 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1368 
1369 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1370 {
1371         return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1372 }
1373 
1374 /* tx handling */
1375 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1376 void ieee80211_tx_pending(unsigned long data);
1377 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1378                                          struct net_device *dev);
1379 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1380                                        struct net_device *dev);
1381 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1382                               struct sk_buff_head *skbs);
1383 
1384 /* HT */
1385 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
1386                                      struct ieee80211_sta_ht_cap *ht_cap);
1387 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
1388                                        struct ieee80211_supported_band *sband,
1389                                        const struct ieee80211_ht_cap *ht_cap_ie,
1390                                        struct sta_info *sta);
1391 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1392                           const u8 *da, u16 tid,
1393                           u16 initiator, u16 reason_code);
1394 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1395                                enum ieee80211_smps_mode smps, const u8 *da,
1396                                const u8 *bssid);
1397 void ieee80211_request_smps_work(struct work_struct *work);
1398 
1399 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1400                                      u16 initiator, u16 reason, bool stop);
1401 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1402                                     u16 initiator, u16 reason, bool stop);
1403 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
1404                                          enum ieee80211_agg_stop_reason reason);
1405 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1406                              struct sta_info *sta,
1407                              struct ieee80211_mgmt *mgmt, size_t len);
1408 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1409                                   struct sta_info *sta,
1410                                   struct ieee80211_mgmt *mgmt,
1411                                   size_t len);
1412 void ieee80211_process_addba_request(struct ieee80211_local *local,
1413                                      struct sta_info *sta,
1414                                      struct ieee80211_mgmt *mgmt,
1415                                      size_t len);
1416 
1417 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1418                                    enum ieee80211_agg_stop_reason reason);
1419 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1420                                     enum ieee80211_agg_stop_reason reason);
1421 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1422 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1423 void ieee80211_ba_session_work(struct work_struct *work);
1424 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1425 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1426 
1427 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);
1428 
1429 /* VHT */
1430 void
1431 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
1432                                     struct ieee80211_supported_band *sband,
1433                                     const struct ieee80211_vht_cap *vht_cap_ie,
1434                                     struct sta_info *sta);
1435 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
1436 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1437 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1438                                  struct sta_info *sta, u8 opmode,
1439                                  enum ieee80211_band band, bool nss_only);
1440 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
1441                                       struct ieee80211_sta_vht_cap *vht_cap);
1442 
1443 /* Spectrum management */
1444 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1445                                        struct ieee80211_mgmt *mgmt,
1446                                        size_t len);
1447 
1448 /* Suspend/resume and hw reconfiguration */
1449 int ieee80211_reconfig(struct ieee80211_local *local);
1450 void ieee80211_stop_device(struct ieee80211_local *local);
1451 
1452 int __ieee80211_suspend(struct ieee80211_hw *hw,
1453                         struct cfg80211_wowlan *wowlan);
1454 
1455 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1456 {
1457         struct ieee80211_local *local = hw_to_local(hw);
1458 
1459         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1460                 "%s: resume with hardware scan still in progress\n",
1461                 wiphy_name(hw->wiphy));
1462 
1463         return ieee80211_reconfig(hw_to_local(hw));
1464 }
1465 
1466 /* utility functions/constants */
1467 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1468 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1469                         enum nl80211_iftype type);
1470 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
1471                              int rate, int erp, int short_preamble);
1472 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1473                                      struct ieee80211_hdr *hdr, const u8 *tsc,
1474                                      gfp_t gfp);
1475 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1476                                bool bss_notify);
1477 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1478                     enum ieee80211_band band);
1479 
1480 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1481                                  struct sk_buff *skb, int tid,
1482                                  enum ieee80211_band band);
1483 
1484 static inline void
1485 ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1486                           struct sk_buff *skb, int tid,
1487                           enum ieee80211_band band)
1488 {
1489         rcu_read_lock();
1490         __ieee80211_tx_skb_tid_band(sdata, skb, tid, band);
1491         rcu_read_unlock();
1492 }
1493 
1494 static inline void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
1495                                         struct sk_buff *skb, int tid)
1496 {
1497         struct ieee80211_chanctx_conf *chanctx_conf;
1498 
1499         rcu_read_lock();
1500         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1501         if (WARN_ON(!chanctx_conf)) {
1502                 rcu_read_unlock();
1503                 kfree_skb(skb);
1504                 return;
1505         }
1506 
1507         __ieee80211_tx_skb_tid_band(sdata, skb, tid,
1508                                     chanctx_conf->def.chan->band);
1509         rcu_read_unlock();
1510 }
1511 
1512 static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
1513                                     struct sk_buff *skb)
1514 {
1515         /* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
1516         ieee80211_tx_skb_tid(sdata, skb, 7);
1517 }
1518 
1519 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1520                                struct ieee802_11_elems *elems,
1521                                u64 filter, u32 crc);
1522 static inline void ieee802_11_parse_elems(const u8 *start, size_t len,
1523                                           bool action,
1524                                           struct ieee802_11_elems *elems)
1525 {
1526         ieee802_11_parse_elems_crc(start, len, action, elems, 0, 0);
1527 }
1528 
1529 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1530 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1531 void ieee80211_dynamic_ps_timer(unsigned long data);
1532 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1533                              struct ieee80211_sub_if_data *sdata,
1534                              int powersave);
1535 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1536                              struct ieee80211_hdr *hdr);
1537 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1538                              struct ieee80211_hdr *hdr, bool ack);
1539 
1540 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1541                                      unsigned long queues,
1542                                      enum queue_stop_reason reason);
1543 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1544                                      unsigned long queues,
1545                                      enum queue_stop_reason reason);
1546 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1547                                     enum queue_stop_reason reason);
1548 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1549                                     enum queue_stop_reason reason);
1550 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
1551 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1552                                struct sk_buff *skb);
1553 void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
1554                                    struct sk_buff_head *skbs,
1555                                    void (*fn)(void *data), void *data);
1556 static inline void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1557                                               struct sk_buff_head *skbs)
1558 {
1559         ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL);
1560 }
1561 void ieee80211_flush_queues(struct ieee80211_local *local,
1562                             struct ieee80211_sub_if_data *sdata);
1563 
1564 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1565                          u16 transaction, u16 auth_alg, u16 status,
1566                          const u8 *extra, size_t extra_len, const u8 *bssid,
1567                          const u8 *da, const u8 *key, u8 key_len, u8 key_idx,
1568                          u32 tx_flags);
1569 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1570                                     const u8 *bssid, u16 stype, u16 reason,
1571                                     bool send_frame, u8 *frame_buf);
1572 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1573                              size_t buffer_len, const u8 *ie, size_t ie_len,
1574                              enum ieee80211_band band, u32 rate_mask,
1575                              u8 channel);
1576 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1577                                           u8 *dst, u32 ratemask,
1578                                           struct ieee80211_channel *chan,
1579                                           const u8 *ssid, size_t ssid_len,
1580                                           const u8 *ie, size_t ie_len,
1581                                           bool directed);
1582 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1583                               const u8 *ssid, size_t ssid_len,
1584                               const u8 *ie, size_t ie_len,
1585                               u32 ratemask, bool directed, u32 tx_flags,
1586                               struct ieee80211_channel *channel, bool scan);
1587 
1588 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1589                                   const size_t supp_rates_len,
1590                                   const u8 *supp_rates);
1591 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1592                             struct ieee802_11_elems *elems,
1593                             enum ieee80211_band band, u32 *basic_rates);
1594 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1595                              enum ieee80211_smps_mode smps_mode);
1596 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata);
1597 
1598 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1599                           const u8 *ids, int n_ids, size_t offset);
1600 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1601 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1602                               u16 cap);
1603 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1604                                const struct cfg80211_chan_def *chandef,
1605                                u16 prot_mode);
1606 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1607                                u32 cap);
1608 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1609                             struct sk_buff *skb, bool need_basic,
1610                             enum ieee80211_band band);
1611 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
1612                                 struct sk_buff *skb, bool need_basic,
1613                                 enum ieee80211_band band);
1614 
1615 /* channel management */
1616 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1617                                   const struct ieee80211_ht_operation *ht_oper,
1618                                   struct cfg80211_chan_def *chandef);
1619 
1620 int __must_check
1621 ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
1622                           const struct cfg80211_chan_def *chandef,
1623                           enum ieee80211_chanctx_mode mode);
1624 int __must_check
1625 ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
1626                                const struct cfg80211_chan_def *chandef,
1627                                u32 *changed);
1628 void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
1629 void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
1630 void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
1631                                          bool clear);
1632 
1633 void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
1634                                    struct ieee80211_chanctx *chanctx);
1635 void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local,
1636                                     struct ieee80211_chanctx *chanctx);
1637 
1638 void ieee80211_dfs_cac_timer(unsigned long data);
1639 void ieee80211_dfs_cac_timer_work(struct work_struct *work);
1640 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local);
1641 void ieee80211_dfs_radar_detected_work(struct work_struct *work);
1642 
1643 #ifdef CONFIG_MAC80211_NOINLINE
1644 #define debug_noinline noinline
1645 #else
1646 #define debug_noinline
1647 #endif
1648 
1649 #endif /* IEEE80211_I_H */
1650 

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