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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  * Copyright 2013-2014  Intel Mobile Communications GmbH
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12 
13 #ifndef IEEE80211_I_H
14 #define IEEE80211_I_H
15 
16 #include <linux/kernel.h>
17 #include <linux/device.h>
18 #include <linux/if_ether.h>
19 #include <linux/interrupt.h>
20 #include <linux/list.h>
21 #include <linux/netdevice.h>
22 #include <linux/skbuff.h>
23 #include <linux/workqueue.h>
24 #include <linux/types.h>
25 #include <linux/spinlock.h>
26 #include <linux/etherdevice.h>
27 #include <linux/leds.h>
28 #include <linux/idr.h>
29 #include <linux/rhashtable.h>
30 #include <net/ieee80211_radiotap.h>
31 #include <net/cfg80211.h>
32 #include <net/mac80211.h>
33 #include "key.h"
34 #include "sta_info.h"
35 #include "debug.h"
36 
37 extern const struct cfg80211_ops mac80211_config_ops;
38 
39 struct ieee80211_local;
40 
41 /* Maximum number of broadcast/multicast frames to buffer when some of the
42  * associated stations are using power saving. */
43 #define AP_MAX_BC_BUFFER 128
44 
45 /* Maximum number of frames buffered to all STAs, including multicast frames.
46  * Note: increasing this limit increases the potential memory requirement. Each
47  * frame can be up to about 2 kB long. */
48 #define TOTAL_MAX_TX_BUFFER 512
49 
50 /* Required encryption head and tailroom */
51 #define IEEE80211_ENCRYPT_HEADROOM 8
52 #define IEEE80211_ENCRYPT_TAILROOM 18
53 
54 /* power level hasn't been configured (or set to automatic) */
55 #define IEEE80211_UNSET_POWER_LEVEL	INT_MIN
56 
57 /*
58  * Some APs experience problems when working with U-APSD. Decreasing the
59  * probability of that happening by using legacy mode for all ACs but VO isn't
60  * enough.
61  *
62  * Cisco 4410N originally forced us to enable VO by default only because it
63  * treated non-VO ACs as legacy.
64  *
65  * However some APs (notably Netgear R7000) silently reclassify packets to
66  * different ACs. Since u-APSD ACs require trigger frames for frame retrieval
67  * clients would never see some frames (e.g. ARP responses) or would fetch them
68  * accidentally after a long time.
69  *
70  * It makes little sense to enable u-APSD queues by default because it needs
71  * userspace applications to be aware of it to actually take advantage of the
72  * possible additional powersavings. Implicitly depending on driver autotrigger
73  * frame support doesn't make much sense.
74  */
75 #define IEEE80211_DEFAULT_UAPSD_QUEUES 0
76 
77 #define IEEE80211_DEFAULT_MAX_SP_LEN		\
78 	IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
79 
80 #define IEEE80211_DEAUTH_FRAME_LEN	(24 /* hdr */ + 2 /* reason */)
81 
82 struct ieee80211_bss {
83 	u32 device_ts_beacon, device_ts_presp;
84 
85 	bool wmm_used;
86 	bool uapsd_supported;
87 
88 #define IEEE80211_MAX_SUPP_RATES 32
89 	u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
90 	size_t supp_rates_len;
91 	struct ieee80211_rate *beacon_rate;
92 
93 	/*
94 	 * During association, we save an ERP value from a probe response so
95 	 * that we can feed ERP info to the driver when handling the
96 	 * association completes. these fields probably won't be up-to-date
97 	 * otherwise, you probably don't want to use them.
98 	 */
99 	bool has_erp_value;
100 	u8 erp_value;
101 
102 	/* Keep track of the corruption of the last beacon/probe response. */
103 	u8 corrupt_data;
104 
105 	/* Keep track of what bits of information we have valid info for. */
106 	u8 valid_data;
107 };
108 
109 /**
110  * enum ieee80211_corrupt_data_flags - BSS data corruption flags
111  * @IEEE80211_BSS_CORRUPT_BEACON: last beacon frame received was corrupted
112  * @IEEE80211_BSS_CORRUPT_PROBE_RESP: last probe response received was corrupted
113  *
114  * These are bss flags that are attached to a bss in the
115  * @corrupt_data field of &struct ieee80211_bss.
116  */
117 enum ieee80211_bss_corrupt_data_flags {
118 	IEEE80211_BSS_CORRUPT_BEACON		= BIT(0),
119 	IEEE80211_BSS_CORRUPT_PROBE_RESP	= BIT(1)
120 };
121 
122 /**
123  * enum ieee80211_valid_data_flags - BSS valid data flags
124  * @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
125  * @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
126  * @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
127  *
128  * These are bss flags that are attached to a bss in the
129  * @valid_data field of &struct ieee80211_bss.  They show which parts
130  * of the data structure were received as a result of an un-corrupted
131  * beacon/probe response.
132  */
133 enum ieee80211_bss_valid_data_flags {
134 	IEEE80211_BSS_VALID_WMM			= BIT(1),
135 	IEEE80211_BSS_VALID_RATES		= BIT(2),
136 	IEEE80211_BSS_VALID_ERP			= BIT(3)
137 };
138 
139 typedef unsigned __bitwise__ ieee80211_tx_result;
140 #define TX_CONTINUE	((__force ieee80211_tx_result) 0u)
141 #define TX_DROP		((__force ieee80211_tx_result) 1u)
142 #define TX_QUEUED	((__force ieee80211_tx_result) 2u)
143 
144 #define IEEE80211_TX_UNICAST		BIT(1)
145 #define IEEE80211_TX_PS_BUFFERED	BIT(2)
146 
147 struct ieee80211_tx_data {
148 	struct sk_buff *skb;
149 	struct sk_buff_head skbs;
150 	struct ieee80211_local *local;
151 	struct ieee80211_sub_if_data *sdata;
152 	struct sta_info *sta;
153 	struct ieee80211_key *key;
154 	struct ieee80211_tx_rate rate;
155 
156 	unsigned int flags;
157 };
158 
159 
160 typedef unsigned __bitwise__ ieee80211_rx_result;
161 #define RX_CONTINUE		((__force ieee80211_rx_result) 0u)
162 #define RX_DROP_UNUSABLE	((__force ieee80211_rx_result) 1u)
163 #define RX_DROP_MONITOR		((__force ieee80211_rx_result) 2u)
164 #define RX_QUEUED		((__force ieee80211_rx_result) 3u)
165 
166 /**
167  * enum ieee80211_packet_rx_flags - packet RX flags
168  * @IEEE80211_RX_AMSDU: a-MSDU packet
169  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
170  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
171  *
172  * These are per-frame flags that are attached to a frame in the
173  * @rx_flags field of &struct ieee80211_rx_status.
174  */
175 enum ieee80211_packet_rx_flags {
176 	IEEE80211_RX_AMSDU			= BIT(3),
177 	IEEE80211_RX_MALFORMED_ACTION_FRM	= BIT(4),
178 	IEEE80211_RX_DEFERRED_RELEASE		= BIT(5),
179 };
180 
181 /**
182  * enum ieee80211_rx_flags - RX data flags
183  *
184  * @IEEE80211_RX_CMNTR: received on cooked monitor already
185  * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
186  *	to cfg80211_report_obss_beacon().
187  *
188  * These flags are used across handling multiple interfaces
189  * for a single frame.
190  */
191 enum ieee80211_rx_flags {
192 	IEEE80211_RX_CMNTR		= BIT(0),
193 	IEEE80211_RX_BEACON_REPORTED	= BIT(1),
194 };
195 
196 struct ieee80211_rx_data {
197 	struct napi_struct *napi;
198 	struct sk_buff *skb;
199 	struct ieee80211_local *local;
200 	struct ieee80211_sub_if_data *sdata;
201 	struct sta_info *sta;
202 	struct ieee80211_key *key;
203 
204 	unsigned int flags;
205 
206 	/*
207 	 * Index into sequence numbers array, 0..16
208 	 * since the last (16) is used for non-QoS,
209 	 * will be 16 on non-QoS frames.
210 	 */
211 	int seqno_idx;
212 
213 	/*
214 	 * Index into the security IV/PN arrays, 0..16
215 	 * since the last (16) is used for CCMP-encrypted
216 	 * management frames, will be set to 16 on mgmt
217 	 * frames and 0 on non-QoS frames.
218 	 */
219 	int security_idx;
220 
221 	union {
222 		struct {
223 			u32 iv32;
224 			u16 iv16;
225 		} tkip;
226 		struct {
227 			u8 pn[IEEE80211_CCMP_PN_LEN];
228 		} ccm_gcm;
229 	};
230 };
231 
232 struct ieee80211_csa_settings {
233 	const u16 *counter_offsets_beacon;
234 	const u16 *counter_offsets_presp;
235 
236 	int n_counter_offsets_beacon;
237 	int n_counter_offsets_presp;
238 
239 	u8 count;
240 };
241 
242 struct beacon_data {
243 	u8 *head, *tail;
244 	int head_len, tail_len;
245 	struct ieee80211_meshconf_ie *meshconf;
246 	u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
247 	u8 csa_current_counter;
248 	struct rcu_head rcu_head;
249 };
250 
251 struct probe_resp {
252 	struct rcu_head rcu_head;
253 	int len;
254 	u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
255 	u8 data[0];
256 };
257 
258 struct ps_data {
259 	/* yes, this looks ugly, but guarantees that we can later use
260 	 * bitmap_empty :)
261 	 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
262 	u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]
263 			__aligned(__alignof__(unsigned long));
264 	struct sk_buff_head bc_buf;
265 	atomic_t num_sta_ps; /* number of stations in PS mode */
266 	int dtim_count;
267 	bool dtim_bc_mc;
268 };
269 
270 struct ieee80211_if_ap {
271 	struct beacon_data __rcu *beacon;
272 	struct probe_resp __rcu *probe_resp;
273 
274 	/* to be used after channel switch. */
275 	struct cfg80211_beacon_data *next_beacon;
276 	struct list_head vlans; /* write-protected with RTNL and local->mtx */
277 
278 	struct ps_data ps;
279 	atomic_t num_mcast_sta; /* number of stations receiving multicast */
280 	enum ieee80211_smps_mode req_smps, /* requested smps mode */
281 			 driver_smps_mode; /* smps mode request */
282 
283 	struct work_struct request_smps_work;
284 };
285 
286 struct ieee80211_if_wds {
287 	struct sta_info *sta;
288 	u8 remote_addr[ETH_ALEN];
289 };
290 
291 struct ieee80211_if_vlan {
292 	struct list_head list; /* write-protected with RTNL and local->mtx */
293 
294 	/* used for all tx if the VLAN is configured to 4-addr mode */
295 	struct sta_info __rcu *sta;
296 };
297 
298 struct mesh_stats {
299 	__u32 fwded_mcast;		/* Mesh forwarded multicast frames */
300 	__u32 fwded_unicast;		/* Mesh forwarded unicast frames */
301 	__u32 fwded_frames;		/* Mesh total forwarded frames */
302 	__u32 dropped_frames_ttl;	/* Not transmitted since mesh_ttl == 0*/
303 	__u32 dropped_frames_no_route;	/* Not transmitted, no route found */
304 	__u32 dropped_frames_congestion;/* Not forwarded due to congestion */
305 };
306 
307 #define PREQ_Q_F_START		0x1
308 #define PREQ_Q_F_REFRESH	0x2
309 struct mesh_preq_queue {
310 	struct list_head list;
311 	u8 dst[ETH_ALEN];
312 	u8 flags;
313 };
314 
315 struct ieee80211_roc_work {
316 	struct list_head list;
317 	struct list_head dependents;
318 
319 	struct delayed_work work;
320 
321 	struct ieee80211_sub_if_data *sdata;
322 
323 	struct ieee80211_channel *chan;
324 
325 	bool started, abort, hw_begun, notified;
326 	bool to_be_freed;
327 	bool on_channel;
328 
329 	unsigned long hw_start_time;
330 
331 	u32 duration, req_duration;
332 	struct sk_buff *frame;
333 	u64 cookie, mgmt_tx_cookie;
334 	enum ieee80211_roc_type type;
335 };
336 
337 /* flags used in struct ieee80211_if_managed.flags */
338 enum ieee80211_sta_flags {
339 	IEEE80211_STA_CONNECTION_POLL	= BIT(1),
340 	IEEE80211_STA_CONTROL_PORT	= BIT(2),
341 	IEEE80211_STA_DISABLE_HT	= BIT(4),
342 	IEEE80211_STA_MFP_ENABLED	= BIT(6),
343 	IEEE80211_STA_UAPSD_ENABLED	= BIT(7),
344 	IEEE80211_STA_NULLFUNC_ACKED	= BIT(8),
345 	IEEE80211_STA_RESET_SIGNAL_AVE	= BIT(9),
346 	IEEE80211_STA_DISABLE_40MHZ	= BIT(10),
347 	IEEE80211_STA_DISABLE_VHT	= BIT(11),
348 	IEEE80211_STA_DISABLE_80P80MHZ	= BIT(12),
349 	IEEE80211_STA_DISABLE_160MHZ	= BIT(13),
350 	IEEE80211_STA_DISABLE_WMM	= BIT(14),
351 	IEEE80211_STA_ENABLE_RRM	= BIT(15),
352 };
353 
354 struct ieee80211_mgd_auth_data {
355 	struct cfg80211_bss *bss;
356 	unsigned long timeout;
357 	int tries;
358 	u16 algorithm, expected_transaction;
359 
360 	u8 key[WLAN_KEY_LEN_WEP104];
361 	u8 key_len, key_idx;
362 	bool done;
363 	bool timeout_started;
364 
365 	u16 sae_trans, sae_status;
366 	size_t data_len;
367 	u8 data[];
368 };
369 
370 struct ieee80211_mgd_assoc_data {
371 	struct cfg80211_bss *bss;
372 	const u8 *supp_rates;
373 
374 	unsigned long timeout;
375 	int tries;
376 
377 	u16 capability;
378 	u8 prev_bssid[ETH_ALEN];
379 	u8 ssid[IEEE80211_MAX_SSID_LEN];
380 	u8 ssid_len;
381 	u8 supp_rates_len;
382 	bool wmm, uapsd;
383 	bool need_beacon;
384 	bool synced;
385 	bool timeout_started;
386 
387 	u8 ap_ht_param;
388 
389 	struct ieee80211_vht_cap ap_vht_cap;
390 
391 	size_t ie_len;
392 	u8 ie[];
393 };
394 
395 struct ieee80211_sta_tx_tspec {
396 	/* timestamp of the first packet in the time slice */
397 	unsigned long time_slice_start;
398 
399 	u32 admitted_time; /* in usecs, unlike over the air */
400 	u8 tsid;
401 	s8 up; /* signed to be able to invalidate with -1 during teardown */
402 
403 	/* consumed TX time in microseconds in the time slice */
404 	u32 consumed_tx_time;
405 	enum {
406 		TX_TSPEC_ACTION_NONE = 0,
407 		TX_TSPEC_ACTION_DOWNGRADE,
408 		TX_TSPEC_ACTION_STOP_DOWNGRADE,
409 	} action;
410 	bool downgraded;
411 };
412 
413 DECLARE_EWMA(beacon_signal, 16, 4)
414 
415 struct ieee80211_if_managed {
416 	struct timer_list timer;
417 	struct timer_list conn_mon_timer;
418 	struct timer_list bcn_mon_timer;
419 	struct timer_list chswitch_timer;
420 	struct work_struct monitor_work;
421 	struct work_struct chswitch_work;
422 	struct work_struct beacon_connection_loss_work;
423 	struct work_struct csa_connection_drop_work;
424 
425 	unsigned long beacon_timeout;
426 	unsigned long probe_timeout;
427 	int probe_send_count;
428 	bool nullfunc_failed;
429 	bool connection_loss;
430 
431 	struct cfg80211_bss *associated;
432 	struct ieee80211_mgd_auth_data *auth_data;
433 	struct ieee80211_mgd_assoc_data *assoc_data;
434 
435 	u8 bssid[ETH_ALEN];
436 
437 	u16 aid;
438 
439 	bool powersave; /* powersave requested for this iface */
440 	bool broken_ap; /* AP is broken -- turn off powersave */
441 	bool have_beacon;
442 	u8 dtim_period;
443 	enum ieee80211_smps_mode req_smps, /* requested smps mode */
444 				 driver_smps_mode; /* smps mode request */
445 
446 	struct work_struct request_smps_work;
447 
448 	unsigned int flags;
449 
450 	bool csa_waiting_bcn;
451 	bool csa_ignored_same_chan;
452 
453 	bool beacon_crc_valid;
454 	u32 beacon_crc;
455 
456 	bool status_acked;
457 	bool status_received;
458 	__le16 status_fc;
459 
460 	enum {
461 		IEEE80211_MFP_DISABLED,
462 		IEEE80211_MFP_OPTIONAL,
463 		IEEE80211_MFP_REQUIRED
464 	} mfp; /* management frame protection */
465 
466 	/*
467 	 * Bitmask of enabled u-apsd queues,
468 	 * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
469 	 * to take effect.
470 	 */
471 	unsigned int uapsd_queues;
472 
473 	/*
474 	 * Maximum number of buffered frames AP can deliver during a
475 	 * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
476 	 * Needs a new association to take effect.
477 	 */
478 	unsigned int uapsd_max_sp_len;
479 
480 	int wmm_last_param_set;
481 
482 	u8 use_4addr;
483 
484 	s16 p2p_noa_index;
485 
486 	struct ewma_beacon_signal ave_beacon_signal;
487 
488 	/*
489 	 * Number of Beacon frames used in ave_beacon_signal. This can be used
490 	 * to avoid generating less reliable cqm events that would be based
491 	 * only on couple of received frames.
492 	 */
493 	unsigned int count_beacon_signal;
494 
495 	/* Number of times beacon loss was invoked. */
496 	unsigned int beacon_loss_count;
497 
498 	/*
499 	 * Last Beacon frame signal strength average (ave_beacon_signal / 16)
500 	 * that triggered a cqm event. 0 indicates that no event has been
501 	 * generated for the current association.
502 	 */
503 	int last_cqm_event_signal;
504 
505 	/*
506 	 * State variables for keeping track of RSSI of the AP currently
507 	 * connected to and informing driver when RSSI has gone
508 	 * below/above a certain threshold.
509 	 */
510 	int rssi_min_thold, rssi_max_thold;
511 	int last_ave_beacon_signal;
512 
513 	struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
514 	struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
515 	struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
516 	struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
517 
518 	/* TDLS support */
519 	u8 tdls_peer[ETH_ALEN] __aligned(2);
520 	struct delayed_work tdls_peer_del_work;
521 	struct sk_buff *orig_teardown_skb; /* The original teardown skb */
522 	struct sk_buff *teardown_skb; /* A copy to send through the AP */
523 	spinlock_t teardown_lock; /* To lock changing teardown_skb */
524 	bool tdls_chan_switch_prohibited;
525 	bool tdls_wider_bw_prohibited;
526 
527 	/* WMM-AC TSPEC support */
528 	struct ieee80211_sta_tx_tspec tx_tspec[IEEE80211_NUM_ACS];
529 	/* Use a separate work struct so that we can do something here
530 	 * while the sdata->work is flushing the queues, for example.
531 	 * otherwise, in scenarios where we hardly get any traffic out
532 	 * on the BE queue, but there's a lot of VO traffic, we might
533 	 * get stuck in a downgraded situation and flush takes forever.
534 	 */
535 	struct delayed_work tx_tspec_wk;
536 };
537 
538 struct ieee80211_if_ibss {
539 	struct timer_list timer;
540 	struct work_struct csa_connection_drop_work;
541 
542 	unsigned long last_scan_completed;
543 
544 	u32 basic_rates;
545 
546 	bool fixed_bssid;
547 	bool fixed_channel;
548 	bool privacy;
549 
550 	bool control_port;
551 	bool userspace_handles_dfs;
552 
553 	u8 bssid[ETH_ALEN] __aligned(2);
554 	u8 ssid[IEEE80211_MAX_SSID_LEN];
555 	u8 ssid_len, ie_len;
556 	u8 *ie;
557 	struct cfg80211_chan_def chandef;
558 
559 	unsigned long ibss_join_req;
560 	/* probe response/beacon for IBSS */
561 	struct beacon_data __rcu *presp;
562 
563 	struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
564 	struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
565 
566 	spinlock_t incomplete_lock;
567 	struct list_head incomplete_stations;
568 
569 	enum {
570 		IEEE80211_IBSS_MLME_SEARCH,
571 		IEEE80211_IBSS_MLME_JOINED,
572 	} state;
573 };
574 
575 /**
576  * struct ieee80211_if_ocb - OCB mode state
577  *
578  * @housekeeping_timer: timer for periodic invocation of a housekeeping task
579  * @wrkq_flags: OCB deferred task action
580  * @incomplete_lock: delayed STA insertion lock
581  * @incomplete_stations: list of STAs waiting for delayed insertion
582  * @joined: indication if the interface is connected to an OCB network
583  */
584 struct ieee80211_if_ocb {
585 	struct timer_list housekeeping_timer;
586 	unsigned long wrkq_flags;
587 
588 	spinlock_t incomplete_lock;
589 	struct list_head incomplete_stations;
590 
591 	bool joined;
592 };
593 
594 /**
595  * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
596  *
597  * these declarations define the interface, which enables
598  * vendor-specific mesh synchronization
599  *
600  */
601 struct ieee802_11_elems;
602 struct ieee80211_mesh_sync_ops {
603 	void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata,
604 			     u16 stype,
605 			     struct ieee80211_mgmt *mgmt,
606 			     struct ieee802_11_elems *elems,
607 			     struct ieee80211_rx_status *rx_status);
608 
609 	/* should be called with beacon_data under RCU read lock */
610 	void (*adjust_tbtt)(struct ieee80211_sub_if_data *sdata,
611 			    struct beacon_data *beacon);
612 	/* add other framework functions here */
613 };
614 
615 struct mesh_csa_settings {
616 	struct rcu_head rcu_head;
617 	struct cfg80211_csa_settings settings;
618 };
619 
620 struct ieee80211_if_mesh {
621 	struct timer_list housekeeping_timer;
622 	struct timer_list mesh_path_timer;
623 	struct timer_list mesh_path_root_timer;
624 
625 	unsigned long wrkq_flags;
626 	unsigned long mbss_changed;
627 
628 	u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
629 	size_t mesh_id_len;
630 	/* Active Path Selection Protocol Identifier */
631 	u8 mesh_pp_id;
632 	/* Active Path Selection Metric Identifier */
633 	u8 mesh_pm_id;
634 	/* Congestion Control Mode Identifier */
635 	u8 mesh_cc_id;
636 	/* Synchronization Protocol Identifier */
637 	u8 mesh_sp_id;
638 	/* Authentication Protocol Identifier */
639 	u8 mesh_auth_id;
640 	/* Local mesh Sequence Number */
641 	u32 sn;
642 	/* Last used PREQ ID */
643 	u32 preq_id;
644 	atomic_t mpaths;
645 	/* Timestamp of last SN update */
646 	unsigned long last_sn_update;
647 	/* Time when it's ok to send next PERR */
648 	unsigned long next_perr;
649 	/* Timestamp of last PREQ sent */
650 	unsigned long last_preq;
651 	struct mesh_rmc *rmc;
652 	spinlock_t mesh_preq_queue_lock;
653 	struct mesh_preq_queue preq_queue;
654 	int preq_queue_len;
655 	struct mesh_stats mshstats;
656 	struct mesh_config mshcfg;
657 	atomic_t estab_plinks;
658 	u32 mesh_seqnum;
659 	bool accepting_plinks;
660 	int num_gates;
661 	struct beacon_data __rcu *beacon;
662 	const u8 *ie;
663 	u8 ie_len;
664 	enum {
665 		IEEE80211_MESH_SEC_NONE = 0x0,
666 		IEEE80211_MESH_SEC_AUTHED = 0x1,
667 		IEEE80211_MESH_SEC_SECURED = 0x2,
668 	} security;
669 	bool user_mpm;
670 	/* Extensible Synchronization Framework */
671 	const struct ieee80211_mesh_sync_ops *sync_ops;
672 	s64 sync_offset_clockdrift_max;
673 	spinlock_t sync_offset_lock;
674 	/* mesh power save */
675 	enum nl80211_mesh_power_mode nonpeer_pm;
676 	int ps_peers_light_sleep;
677 	int ps_peers_deep_sleep;
678 	struct ps_data ps;
679 	/* Channel Switching Support */
680 	struct mesh_csa_settings __rcu *csa;
681 	enum {
682 		IEEE80211_MESH_CSA_ROLE_NONE,
683 		IEEE80211_MESH_CSA_ROLE_INIT,
684 		IEEE80211_MESH_CSA_ROLE_REPEATER,
685 	} csa_role;
686 	u8 chsw_ttl;
687 	u16 pre_value;
688 
689 	/* offset from skb->data while building IE */
690 	int meshconf_offset;
691 };
692 
693 #ifdef CONFIG_MAC80211_MESH
694 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name)	\
695 	do { (msh)->mshstats.name++; } while (0)
696 #else
697 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
698 	do { } while (0)
699 #endif
700 
701 /**
702  * enum ieee80211_sub_if_data_flags - virtual interface flags
703  *
704  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
705  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
706  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
707  *	associated stations and deliver multicast frames both
708  *	back to wireless media and to the local net stack.
709  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
710  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
711  * @IEEE80211_SDATA_MU_MIMO_OWNER: indicates interface owns MU-MIMO capability
712  */
713 enum ieee80211_sub_if_data_flags {
714 	IEEE80211_SDATA_ALLMULTI		= BIT(0),
715 	IEEE80211_SDATA_OPERATING_GMODE		= BIT(2),
716 	IEEE80211_SDATA_DONT_BRIDGE_PACKETS	= BIT(3),
717 	IEEE80211_SDATA_DISCONNECT_RESUME	= BIT(4),
718 	IEEE80211_SDATA_IN_DRIVER		= BIT(5),
719 	IEEE80211_SDATA_MU_MIMO_OWNER		= BIT(6),
720 };
721 
722 /**
723  * enum ieee80211_sdata_state_bits - virtual interface state bits
724  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
725  *	mirrors netif_running() but is separate for interface type
726  *	change handling while the interface is up
727  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
728  *	mode, so queues are stopped
729  * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
730  *	to offchannel, reset when offchannel returns
731  */
732 enum ieee80211_sdata_state_bits {
733 	SDATA_STATE_RUNNING,
734 	SDATA_STATE_OFFCHANNEL,
735 	SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
736 };
737 
738 /**
739  * enum ieee80211_chanctx_mode - channel context configuration mode
740  *
741  * @IEEE80211_CHANCTX_SHARED: channel context may be used by
742  *	multiple interfaces
743  * @IEEE80211_CHANCTX_EXCLUSIVE: channel context can be used
744  *	only by a single interface. This can be used for example for
745  *	non-fixed channel IBSS.
746  */
747 enum ieee80211_chanctx_mode {
748 	IEEE80211_CHANCTX_SHARED,
749 	IEEE80211_CHANCTX_EXCLUSIVE
750 };
751 
752 /**
753  * enum ieee80211_chanctx_replace_state - channel context replacement state
754  *
755  * This is used for channel context in-place reservations that require channel
756  * context switch/swap.
757  *
758  * @IEEE80211_CHANCTX_REPLACE_NONE: no replacement is taking place
759  * @IEEE80211_CHANCTX_WILL_BE_REPLACED: this channel context will be replaced
760  *	by a (not yet registered) channel context pointed by %replace_ctx.
761  * @IEEE80211_CHANCTX_REPLACES_OTHER: this (not yet registered) channel context
762  *	replaces an existing channel context pointed to by %replace_ctx.
763  */
764 enum ieee80211_chanctx_replace_state {
765 	IEEE80211_CHANCTX_REPLACE_NONE,
766 	IEEE80211_CHANCTX_WILL_BE_REPLACED,
767 	IEEE80211_CHANCTX_REPLACES_OTHER,
768 };
769 
770 struct ieee80211_chanctx {
771 	struct list_head list;
772 	struct rcu_head rcu_head;
773 
774 	struct list_head assigned_vifs;
775 	struct list_head reserved_vifs;
776 
777 	enum ieee80211_chanctx_replace_state replace_state;
778 	struct ieee80211_chanctx *replace_ctx;
779 
780 	enum ieee80211_chanctx_mode mode;
781 	bool driver_present;
782 
783 	struct ieee80211_chanctx_conf conf;
784 };
785 
786 struct mac80211_qos_map {
787 	struct cfg80211_qos_map qos_map;
788 	struct rcu_head rcu_head;
789 };
790 
791 enum txq_info_flags {
792 	IEEE80211_TXQ_STOP,
793 	IEEE80211_TXQ_AMPDU,
794 };
795 
796 struct txq_info {
797 	struct sk_buff_head queue;
798 	unsigned long flags;
799 
800 	/* keep last! */
801 	struct ieee80211_txq txq;
802 };
803 
804 struct ieee80211_sub_if_data {
805 	struct list_head list;
806 
807 	struct wireless_dev wdev;
808 
809 	/* keys */
810 	struct list_head key_list;
811 
812 	/* count for keys needing tailroom space allocation */
813 	int crypto_tx_tailroom_needed_cnt;
814 	int crypto_tx_tailroom_pending_dec;
815 	struct delayed_work dec_tailroom_needed_wk;
816 
817 	struct net_device *dev;
818 	struct ieee80211_local *local;
819 
820 	unsigned int flags;
821 
822 	unsigned long state;
823 
824 	char name[IFNAMSIZ];
825 
826 	struct ieee80211_fragment_cache frags;
827 
828 	/* TID bitmap for NoAck policy */
829 	u16 noack_map;
830 
831 	/* bit field of ACM bits (BIT(802.1D tag)) */
832 	u8 wmm_acm;
833 
834 	struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
835 	struct ieee80211_key __rcu *default_unicast_key;
836 	struct ieee80211_key __rcu *default_multicast_key;
837 	struct ieee80211_key __rcu *default_mgmt_key;
838 
839 	u16 sequence_number;
840 	__be16 control_port_protocol;
841 	bool control_port_no_encrypt;
842 	int encrypt_headroom;
843 
844 	atomic_t txqs_len[IEEE80211_NUM_ACS];
845 	struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
846 	struct mac80211_qos_map __rcu *qos_map;
847 
848 	struct work_struct csa_finalize_work;
849 	bool csa_block_tx; /* write-protected by sdata_lock and local->mtx */
850 	struct cfg80211_chan_def csa_chandef;
851 
852 	struct list_head assigned_chanctx_list; /* protected by chanctx_mtx */
853 	struct list_head reserved_chanctx_list; /* protected by chanctx_mtx */
854 
855 	/* context reservation -- protected with chanctx_mtx */
856 	struct ieee80211_chanctx *reserved_chanctx;
857 	struct cfg80211_chan_def reserved_chandef;
858 	bool reserved_radar_required;
859 	bool reserved_ready;
860 
861 	/* used to reconfigure hardware SM PS */
862 	struct work_struct recalc_smps;
863 
864 	struct work_struct work;
865 	struct sk_buff_head skb_queue;
866 
867 	u8 needed_rx_chains;
868 	enum ieee80211_smps_mode smps_mode;
869 
870 	int user_power_level; /* in dBm */
871 	int ap_power_level; /* in dBm */
872 
873 	bool radar_required;
874 	struct delayed_work dfs_cac_timer_work;
875 
876 	/*
877 	 * AP this belongs to: self in AP mode and
878 	 * corresponding AP in VLAN mode, NULL for
879 	 * all others (might be needed later in IBSS)
880 	 */
881 	struct ieee80211_if_ap *bss;
882 
883 	/* bitmap of allowed (non-MCS) rate indexes for rate control */
884 	u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
885 
886 	bool rc_has_mcs_mask[IEEE80211_NUM_BANDS];
887 	u8  rc_rateidx_mcs_mask[IEEE80211_NUM_BANDS][IEEE80211_HT_MCS_MASK_LEN];
888 
889 	bool rc_has_vht_mcs_mask[IEEE80211_NUM_BANDS];
890 	u16 rc_rateidx_vht_mcs_mask[IEEE80211_NUM_BANDS][NL80211_VHT_NSS_MAX];
891 
892 	union {
893 		struct ieee80211_if_ap ap;
894 		struct ieee80211_if_wds wds;
895 		struct ieee80211_if_vlan vlan;
896 		struct ieee80211_if_managed mgd;
897 		struct ieee80211_if_ibss ibss;
898 		struct ieee80211_if_mesh mesh;
899 		struct ieee80211_if_ocb ocb;
900 		u32 mntr_flags;
901 	} u;
902 
903 #ifdef CONFIG_MAC80211_DEBUGFS
904 	struct {
905 		struct dentry *subdir_stations;
906 		struct dentry *default_unicast_key;
907 		struct dentry *default_multicast_key;
908 		struct dentry *default_mgmt_key;
909 	} debugfs;
910 #endif
911 
912 	/* must be last, dynamically sized area in this! */
913 	struct ieee80211_vif vif;
914 };
915 
916 static inline
vif_to_sdata(struct ieee80211_vif * p)917 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
918 {
919 	return container_of(p, struct ieee80211_sub_if_data, vif);
920 }
921 
sdata_lock(struct ieee80211_sub_if_data * sdata)922 static inline void sdata_lock(struct ieee80211_sub_if_data *sdata)
923 	__acquires(&sdata->wdev.mtx)
924 {
925 	mutex_lock(&sdata->wdev.mtx);
926 	__acquire(&sdata->wdev.mtx);
927 }
928 
sdata_unlock(struct ieee80211_sub_if_data * sdata)929 static inline void sdata_unlock(struct ieee80211_sub_if_data *sdata)
930 	__releases(&sdata->wdev.mtx)
931 {
932 	mutex_unlock(&sdata->wdev.mtx);
933 	__release(&sdata->wdev.mtx);
934 }
935 
936 #define sdata_dereference(p, sdata) \
937 	rcu_dereference_protected(p, lockdep_is_held(&sdata->wdev.mtx))
938 
939 static inline void
sdata_assert_lock(struct ieee80211_sub_if_data * sdata)940 sdata_assert_lock(struct ieee80211_sub_if_data *sdata)
941 {
942 	lockdep_assert_held(&sdata->wdev.mtx);
943 }
944 
945 static inline enum ieee80211_band
ieee80211_get_sdata_band(struct ieee80211_sub_if_data * sdata)946 ieee80211_get_sdata_band(struct ieee80211_sub_if_data *sdata)
947 {
948 	enum ieee80211_band band = IEEE80211_BAND_2GHZ;
949 	struct ieee80211_chanctx_conf *chanctx_conf;
950 
951 	rcu_read_lock();
952 	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
953 	if (!WARN_ON(!chanctx_conf))
954 		band = chanctx_conf->def.chan->band;
955 	rcu_read_unlock();
956 
957 	return band;
958 }
959 
960 static inline int
ieee80211_chandef_get_shift(struct cfg80211_chan_def * chandef)961 ieee80211_chandef_get_shift(struct cfg80211_chan_def *chandef)
962 {
963 	switch (chandef->width) {
964 	case NL80211_CHAN_WIDTH_5:
965 		return 2;
966 	case NL80211_CHAN_WIDTH_10:
967 		return 1;
968 	default:
969 		return 0;
970 	}
971 }
972 
973 static inline int
ieee80211_vif_get_shift(struct ieee80211_vif * vif)974 ieee80211_vif_get_shift(struct ieee80211_vif *vif)
975 {
976 	struct ieee80211_chanctx_conf *chanctx_conf;
977 	int shift = 0;
978 
979 	rcu_read_lock();
980 	chanctx_conf = rcu_dereference(vif->chanctx_conf);
981 	if (chanctx_conf)
982 		shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
983 	rcu_read_unlock();
984 
985 	return shift;
986 }
987 
988 struct ieee80211_rx_agg {
989 	u8 addr[ETH_ALEN];
990 	u16 tid;
991 };
992 
993 enum sdata_queue_type {
994 	IEEE80211_SDATA_QUEUE_TYPE_FRAME	= 0,
995 	IEEE80211_SDATA_QUEUE_AGG_START		= 1,
996 	IEEE80211_SDATA_QUEUE_AGG_STOP		= 2,
997 	IEEE80211_SDATA_QUEUE_RX_AGG_START	= 3,
998 	IEEE80211_SDATA_QUEUE_RX_AGG_STOP	= 4,
999 };
1000 
1001 enum {
1002 	IEEE80211_RX_MSG	= 1,
1003 	IEEE80211_TX_STATUS_MSG	= 2,
1004 };
1005 
1006 enum queue_stop_reason {
1007 	IEEE80211_QUEUE_STOP_REASON_DRIVER,
1008 	IEEE80211_QUEUE_STOP_REASON_PS,
1009 	IEEE80211_QUEUE_STOP_REASON_CSA,
1010 	IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
1011 	IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1012 	IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
1013 	IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
1014 	IEEE80211_QUEUE_STOP_REASON_FLUSH,
1015 	IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN,
1016 	IEEE80211_QUEUE_STOP_REASON_RESERVE_TID,
1017 	IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE,
1018 
1019 	IEEE80211_QUEUE_STOP_REASONS,
1020 };
1021 
1022 #ifdef CONFIG_MAC80211_LEDS
1023 struct tpt_led_trigger {
1024 	char name[32];
1025 	const struct ieee80211_tpt_blink *blink_table;
1026 	unsigned int blink_table_len;
1027 	struct timer_list timer;
1028 	unsigned long prev_traffic;
1029 	unsigned long tx_bytes, rx_bytes;
1030 	unsigned int active, want;
1031 	bool running;
1032 };
1033 #endif
1034 
1035 /**
1036  * mac80211 scan flags - currently active scan mode
1037  *
1038  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
1039  *	well be on the operating channel
1040  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
1041  *	determine if we are on the operating channel or not
1042  * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
1043  *	channel. This should not interrupt normal traffic.
1044  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
1045  *	that the scan completed.
1046  * @SCAN_ABORTED: Set for our scan work function when the driver reported
1047  *	a scan complete for an aborted scan.
1048  * @SCAN_HW_CANCELLED: Set for our scan work function when the scan is being
1049  *	cancelled.
1050  */
1051 enum {
1052 	SCAN_SW_SCANNING,
1053 	SCAN_HW_SCANNING,
1054 	SCAN_ONCHANNEL_SCANNING,
1055 	SCAN_COMPLETED,
1056 	SCAN_ABORTED,
1057 	SCAN_HW_CANCELLED,
1058 };
1059 
1060 /**
1061  * enum mac80211_scan_state - scan state machine states
1062  *
1063  * @SCAN_DECISION: Main entry point to the scan state machine, this state
1064  *	determines if we should keep on scanning or switch back to the
1065  *	operating channel
1066  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
1067  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
1068  * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
1069  *	send out data
1070  * @SCAN_RESUME: Resume the scan and scan the next channel
1071  * @SCAN_ABORT: Abort the scan and go back to operating channel
1072  */
1073 enum mac80211_scan_state {
1074 	SCAN_DECISION,
1075 	SCAN_SET_CHANNEL,
1076 	SCAN_SEND_PROBE,
1077 	SCAN_SUSPEND,
1078 	SCAN_RESUME,
1079 	SCAN_ABORT,
1080 };
1081 
1082 struct ieee80211_local {
1083 	/* embed the driver visible part.
1084 	 * don't cast (use the static inlines below), but we keep
1085 	 * it first anyway so they become a no-op */
1086 	struct ieee80211_hw hw;
1087 
1088 	const struct ieee80211_ops *ops;
1089 
1090 	/*
1091 	 * private workqueue to mac80211. mac80211 makes this accessible
1092 	 * via ieee80211_queue_work()
1093 	 */
1094 	struct workqueue_struct *workqueue;
1095 
1096 	unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
1097 	int q_stop_reasons[IEEE80211_MAX_QUEUES][IEEE80211_QUEUE_STOP_REASONS];
1098 	/* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
1099 	spinlock_t queue_stop_reason_lock;
1100 
1101 	int open_count;
1102 	int monitors, cooked_mntrs;
1103 	/* number of interfaces with corresponding FIF_ flags */
1104 	int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
1105 	    fif_probe_req;
1106 	int probe_req_reg;
1107 	unsigned int filter_flags; /* FIF_* */
1108 
1109 	bool wiphy_ciphers_allocated;
1110 
1111 	bool use_chanctx;
1112 
1113 	/* protects the aggregated multicast list and filter calls */
1114 	spinlock_t filter_lock;
1115 
1116 	/* used for uploading changed mc list */
1117 	struct work_struct reconfig_filter;
1118 
1119 	/* aggregated multicast list */
1120 	struct netdev_hw_addr_list mc_list;
1121 
1122 	bool tim_in_locked_section; /* see ieee80211_beacon_get() */
1123 
1124 	/*
1125 	 * suspended is true if we finished all the suspend _and_ we have
1126 	 * not yet come up from resume. This is to be used by mac80211
1127 	 * to ensure driver sanity during suspend and mac80211's own
1128 	 * sanity. It can eventually be used for WoW as well.
1129 	 */
1130 	bool suspended;
1131 
1132 	/*
1133 	 * Resuming is true while suspended, but when we're reprogramming the
1134 	 * hardware -- at that time it's allowed to use ieee80211_queue_work()
1135 	 * again even though some other parts of the stack are still suspended
1136 	 * and we still drop received frames to avoid waking the stack.
1137 	 */
1138 	bool resuming;
1139 
1140 	/*
1141 	 * quiescing is true during the suspend process _only_ to
1142 	 * ease timer cancelling etc.
1143 	 */
1144 	bool quiescing;
1145 
1146 	/* device is started */
1147 	bool started;
1148 
1149 	/* device is during a HW reconfig */
1150 	bool in_reconfig;
1151 
1152 	/* wowlan is enabled -- don't reconfig on resume */
1153 	bool wowlan;
1154 
1155 	struct work_struct radar_detected_work;
1156 
1157 	/* number of RX chains the hardware has */
1158 	u8 rx_chains;
1159 
1160 	int tx_headroom; /* required headroom for hardware/radiotap */
1161 
1162 	/* Tasklet and skb queue to process calls from IRQ mode. All frames
1163 	 * added to skb_queue will be processed, but frames in
1164 	 * skb_queue_unreliable may be dropped if the total length of these
1165 	 * queues increases over the limit. */
1166 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
1167 	struct tasklet_struct tasklet;
1168 	struct sk_buff_head skb_queue;
1169 	struct sk_buff_head skb_queue_unreliable;
1170 
1171 	spinlock_t rx_path_lock;
1172 
1173 	/* Station data */
1174 	/*
1175 	 * The mutex only protects the list, hash table and
1176 	 * counter, reads are done with RCU.
1177 	 */
1178 	struct mutex sta_mtx;
1179 	spinlock_t tim_lock;
1180 	unsigned long num_sta;
1181 	struct list_head sta_list;
1182 	struct rhashtable sta_hash;
1183 	struct timer_list sta_cleanup;
1184 	int sta_generation;
1185 
1186 	struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
1187 	struct tasklet_struct tx_pending_tasklet;
1188 
1189 	atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
1190 
1191 	/* number of interfaces with allmulti RX */
1192 	atomic_t iff_allmultis;
1193 
1194 	struct rate_control_ref *rate_ctrl;
1195 
1196 	struct crypto_cipher *wep_tx_tfm;
1197 	struct crypto_cipher *wep_rx_tfm;
1198 	u32 wep_iv;
1199 
1200 	/* see iface.c */
1201 	struct list_head interfaces;
1202 	struct mutex iflist_mtx;
1203 
1204 	/*
1205 	 * Key mutex, protects sdata's key_list and sta_info's
1206 	 * key pointers (write access, they're RCU.)
1207 	 */
1208 	struct mutex key_mtx;
1209 
1210 	/* mutex for scan and work locking */
1211 	struct mutex mtx;
1212 
1213 	/* Scanning and BSS list */
1214 	unsigned long scanning;
1215 	struct cfg80211_ssid scan_ssid;
1216 	struct cfg80211_scan_request *int_scan_req;
1217 	struct cfg80211_scan_request __rcu *scan_req;
1218 	struct ieee80211_scan_request *hw_scan_req;
1219 	struct cfg80211_chan_def scan_chandef;
1220 	enum ieee80211_band hw_scan_band;
1221 	int scan_channel_idx;
1222 	int scan_ies_len;
1223 	int hw_scan_ies_bufsize;
1224 
1225 	struct work_struct sched_scan_stopped_work;
1226 	struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
1227 	struct cfg80211_sched_scan_request __rcu *sched_scan_req;
1228 	u8 scan_addr[ETH_ALEN];
1229 
1230 	unsigned long leave_oper_channel_time;
1231 	enum mac80211_scan_state next_scan_state;
1232 	struct delayed_work scan_work;
1233 	struct ieee80211_sub_if_data __rcu *scan_sdata;
1234 	/* For backward compatibility only -- do not use */
1235 	struct cfg80211_chan_def _oper_chandef;
1236 
1237 	/* Temporary remain-on-channel for off-channel operations */
1238 	struct ieee80211_channel *tmp_channel;
1239 
1240 	/* channel contexts */
1241 	struct list_head chanctx_list;
1242 	struct mutex chanctx_mtx;
1243 
1244 #ifdef CONFIG_MAC80211_LEDS
1245 	struct led_trigger tx_led, rx_led, assoc_led, radio_led;
1246 	struct led_trigger tpt_led;
1247 	atomic_t tx_led_active, rx_led_active, assoc_led_active;
1248 	atomic_t radio_led_active, tpt_led_active;
1249 	struct tpt_led_trigger *tpt_led_trigger;
1250 #endif
1251 
1252 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
1253 	/* SNMP counters */
1254 	/* dot11CountersTable */
1255 	u32 dot11TransmittedFragmentCount;
1256 	u32 dot11MulticastTransmittedFrameCount;
1257 	u32 dot11FailedCount;
1258 	u32 dot11RetryCount;
1259 	u32 dot11MultipleRetryCount;
1260 	u32 dot11FrameDuplicateCount;
1261 	u32 dot11ReceivedFragmentCount;
1262 	u32 dot11MulticastReceivedFrameCount;
1263 	u32 dot11TransmittedFrameCount;
1264 
1265 	/* TX/RX handler statistics */
1266 	unsigned int tx_handlers_drop;
1267 	unsigned int tx_handlers_queued;
1268 	unsigned int tx_handlers_drop_wep;
1269 	unsigned int tx_handlers_drop_not_assoc;
1270 	unsigned int tx_handlers_drop_unauth_port;
1271 	unsigned int rx_handlers_drop;
1272 	unsigned int rx_handlers_queued;
1273 	unsigned int rx_handlers_drop_nullfunc;
1274 	unsigned int rx_handlers_drop_defrag;
1275 	unsigned int tx_expand_skb_head;
1276 	unsigned int tx_expand_skb_head_cloned;
1277 	unsigned int rx_expand_skb_head_defrag;
1278 	unsigned int rx_handlers_fragments;
1279 	unsigned int tx_status_drop;
1280 #define I802_DEBUG_INC(c) (c)++
1281 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
1282 #define I802_DEBUG_INC(c) do { } while (0)
1283 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
1284 
1285 
1286 	int total_ps_buffered; /* total number of all buffered unicast and
1287 				* multicast packets for power saving stations
1288 				*/
1289 
1290 	bool pspolling;
1291 	bool offchannel_ps_enabled;
1292 	/*
1293 	 * PS can only be enabled when we have exactly one managed
1294 	 * interface (and monitors) in PS, this then points there.
1295 	 */
1296 	struct ieee80211_sub_if_data *ps_sdata;
1297 	struct work_struct dynamic_ps_enable_work;
1298 	struct work_struct dynamic_ps_disable_work;
1299 	struct timer_list dynamic_ps_timer;
1300 	struct notifier_block ifa_notifier;
1301 	struct notifier_block ifa6_notifier;
1302 
1303 	/*
1304 	 * The dynamic ps timeout configured from user space via WEXT -
1305 	 * this will override whatever chosen by mac80211 internally.
1306 	 */
1307 	int dynamic_ps_forced_timeout;
1308 
1309 	int user_power_level; /* in dBm, for all interfaces */
1310 
1311 	enum ieee80211_smps_mode smps_mode;
1312 
1313 	struct work_struct restart_work;
1314 
1315 #ifdef CONFIG_MAC80211_DEBUGFS
1316 	struct local_debugfsdentries {
1317 		struct dentry *rcdir;
1318 		struct dentry *keys;
1319 	} debugfs;
1320 #endif
1321 
1322 	/*
1323 	 * Remain-on-channel support
1324 	 */
1325 	struct list_head roc_list;
1326 	struct work_struct hw_roc_start, hw_roc_done;
1327 	unsigned long hw_roc_start_time;
1328 	u64 roc_cookie_counter;
1329 
1330 	struct idr ack_status_frames;
1331 	spinlock_t ack_status_lock;
1332 
1333 	struct ieee80211_sub_if_data __rcu *p2p_sdata;
1334 
1335 	/* virtual monitor interface */
1336 	struct ieee80211_sub_if_data __rcu *monitor_sdata;
1337 	struct cfg80211_chan_def monitor_chandef;
1338 
1339 	/* extended capabilities provided by mac80211 */
1340 	u8 ext_capa[8];
1341 
1342 	/* TDLS channel switch */
1343 	struct work_struct tdls_chsw_work;
1344 	struct sk_buff_head skb_queue_tdls_chsw;
1345 };
1346 
1347 static inline struct ieee80211_sub_if_data *
IEEE80211_DEV_TO_SUB_IF(struct net_device * dev)1348 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1349 {
1350 	return netdev_priv(dev);
1351 }
1352 
1353 static inline struct ieee80211_sub_if_data *
IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev * wdev)1354 IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev *wdev)
1355 {
1356 	return container_of(wdev, struct ieee80211_sub_if_data, wdev);
1357 }
1358 
1359 /* this struct represents 802.11n's RA/TID combination */
1360 struct ieee80211_ra_tid {
1361 	u8 ra[ETH_ALEN];
1362 	u16 tid;
1363 };
1364 
1365 /* this struct holds the value parsing from channel switch IE  */
1366 struct ieee80211_csa_ie {
1367 	struct cfg80211_chan_def chandef;
1368 	u8 mode;
1369 	u8 count;
1370 	u8 ttl;
1371 	u16 pre_value;
1372 };
1373 
1374 /* Parsed Information Elements */
1375 struct ieee802_11_elems {
1376 	const u8 *ie_start;
1377 	size_t total_len;
1378 
1379 	/* pointers to IEs */
1380 	const struct ieee80211_tdls_lnkie *lnk_id;
1381 	const struct ieee80211_ch_switch_timing *ch_sw_timing;
1382 	const u8 *ext_capab;
1383 	const u8 *ssid;
1384 	const u8 *supp_rates;
1385 	const u8 *ds_params;
1386 	const struct ieee80211_tim_ie *tim;
1387 	const u8 *challenge;
1388 	const u8 *rsn;
1389 	const u8 *erp_info;
1390 	const u8 *ext_supp_rates;
1391 	const u8 *wmm_info;
1392 	const u8 *wmm_param;
1393 	const struct ieee80211_ht_cap *ht_cap_elem;
1394 	const struct ieee80211_ht_operation *ht_operation;
1395 	const struct ieee80211_vht_cap *vht_cap_elem;
1396 	const struct ieee80211_vht_operation *vht_operation;
1397 	const struct ieee80211_meshconf_ie *mesh_config;
1398 	const u8 *mesh_id;
1399 	const u8 *peering;
1400 	const __le16 *awake_window;
1401 	const u8 *preq;
1402 	const u8 *prep;
1403 	const u8 *perr;
1404 	const struct ieee80211_rann_ie *rann;
1405 	const struct ieee80211_channel_sw_ie *ch_switch_ie;
1406 	const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
1407 	const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1408 	const u8 *country_elem;
1409 	const u8 *pwr_constr_elem;
1410 	const u8 *cisco_dtpc_elem;
1411 	const struct ieee80211_timeout_interval_ie *timeout_int;
1412 	const u8 *opmode_notif;
1413 	const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1414 	const struct ieee80211_mesh_chansw_params_ie *mesh_chansw_params_ie;
1415 
1416 	/* length of them, respectively */
1417 	u8 ext_capab_len;
1418 	u8 ssid_len;
1419 	u8 supp_rates_len;
1420 	u8 tim_len;
1421 	u8 challenge_len;
1422 	u8 rsn_len;
1423 	u8 ext_supp_rates_len;
1424 	u8 wmm_info_len;
1425 	u8 wmm_param_len;
1426 	u8 mesh_id_len;
1427 	u8 peering_len;
1428 	u8 preq_len;
1429 	u8 prep_len;
1430 	u8 perr_len;
1431 	u8 country_elem_len;
1432 
1433 	/* whether a parse error occurred while retrieving these elements */
1434 	bool parse_error;
1435 };
1436 
hw_to_local(struct ieee80211_hw * hw)1437 static inline struct ieee80211_local *hw_to_local(
1438 	struct ieee80211_hw *hw)
1439 {
1440 	return container_of(hw, struct ieee80211_local, hw);
1441 }
1442 
to_txq_info(struct ieee80211_txq * txq)1443 static inline struct txq_info *to_txq_info(struct ieee80211_txq *txq)
1444 {
1445 	return container_of(txq, struct txq_info, txq);
1446 }
1447 
ieee80211_bssid_match(const u8 * raddr,const u8 * addr)1448 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1449 {
1450 	return ether_addr_equal(raddr, addr) ||
1451 	       is_broadcast_ether_addr(raddr);
1452 }
1453 
1454 static inline bool
ieee80211_have_rx_timestamp(struct ieee80211_rx_status * status)1455 ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
1456 {
1457 	WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
1458 		     status->flag & RX_FLAG_MACTIME_END);
1459 	return status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END);
1460 }
1461 
1462 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
1463 				     struct ieee80211_rx_status *status,
1464 				     unsigned int mpdu_len,
1465 				     unsigned int mpdu_offset);
1466 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1467 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1468 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1469 				      u32 changed);
1470 void ieee80211_configure_filter(struct ieee80211_local *local);
1471 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1472 
1473 /* STA code */
1474 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1475 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1476 		       struct cfg80211_auth_request *req);
1477 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1478 			struct cfg80211_assoc_request *req);
1479 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1480 			 struct cfg80211_deauth_request *req);
1481 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1482 			   struct cfg80211_disassoc_request *req);
1483 void ieee80211_send_pspoll(struct ieee80211_local *local,
1484 			   struct ieee80211_sub_if_data *sdata);
1485 void ieee80211_recalc_ps(struct ieee80211_local *local);
1486 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata);
1487 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1488 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1489 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1490 				  struct sk_buff *skb);
1491 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1492 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1493 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
1494 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
1495 				  __le16 fc, bool acked);
1496 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata);
1497 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1498 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata);
1499 
1500 /* IBSS code */
1501 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1502 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1503 void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1504 			      const u8 *bssid, const u8 *addr, u32 supp_rates);
1505 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1506 			struct cfg80211_ibss_params *params);
1507 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1508 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1509 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1510 				   struct sk_buff *skb);
1511 int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
1512 			      struct cfg80211_csa_settings *csa_settings);
1513 int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata);
1514 void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata);
1515 
1516 /* OCB code */
1517 void ieee80211_ocb_work(struct ieee80211_sub_if_data *sdata);
1518 void ieee80211_ocb_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1519 			     const u8 *bssid, const u8 *addr, u32 supp_rates);
1520 void ieee80211_ocb_setup_sdata(struct ieee80211_sub_if_data *sdata);
1521 int ieee80211_ocb_join(struct ieee80211_sub_if_data *sdata,
1522 		       struct ocb_setup *setup);
1523 int ieee80211_ocb_leave(struct ieee80211_sub_if_data *sdata);
1524 
1525 /* mesh code */
1526 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1527 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1528 				   struct sk_buff *skb);
1529 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1530 			      struct cfg80211_csa_settings *csa_settings);
1531 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata);
1532 
1533 /* scan/BSS handling */
1534 void ieee80211_scan_work(struct work_struct *work);
1535 int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
1536 				const u8 *ssid, u8 ssid_len,
1537 				struct ieee80211_channel **channels,
1538 				unsigned int n_channels,
1539 				enum nl80211_bss_scan_width scan_width);
1540 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1541 			   struct cfg80211_scan_request *req);
1542 void ieee80211_scan_cancel(struct ieee80211_local *local);
1543 void ieee80211_run_deferred_scan(struct ieee80211_local *local);
1544 void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb);
1545 
1546 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1547 struct ieee80211_bss *
1548 ieee80211_bss_info_update(struct ieee80211_local *local,
1549 			  struct ieee80211_rx_status *rx_status,
1550 			  struct ieee80211_mgmt *mgmt,
1551 			  size_t len,
1552 			  struct ieee802_11_elems *elems,
1553 			  struct ieee80211_channel *channel);
1554 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1555 			  struct ieee80211_bss *bss);
1556 
1557 /* scheduled scan handling */
1558 int
1559 __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1560 				     struct cfg80211_sched_scan_request *req);
1561 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1562 				       struct cfg80211_sched_scan_request *req);
1563 int ieee80211_request_sched_scan_stop(struct ieee80211_local *local);
1564 void ieee80211_sched_scan_end(struct ieee80211_local *local);
1565 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1566 
1567 /* off-channel helpers */
1568 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
1569 void ieee80211_offchannel_return(struct ieee80211_local *local);
1570 void ieee80211_roc_setup(struct ieee80211_local *local);
1571 void ieee80211_start_next_roc(struct ieee80211_local *local);
1572 void ieee80211_roc_purge(struct ieee80211_local *local,
1573 			 struct ieee80211_sub_if_data *sdata);
1574 void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc, bool free);
1575 void ieee80211_sw_roc_work(struct work_struct *work);
1576 void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
1577 
1578 /* channel switch handling */
1579 void ieee80211_csa_finalize_work(struct work_struct *work);
1580 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
1581 			     struct cfg80211_csa_settings *params);
1582 
1583 /* interface handling */
1584 int ieee80211_iface_init(void);
1585 void ieee80211_iface_exit(void);
1586 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1587 		     unsigned char name_assign_type,
1588 		     struct wireless_dev **new_wdev, enum nl80211_iftype type,
1589 		     struct vif_params *params);
1590 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1591 			     enum nl80211_iftype type);
1592 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1593 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1594 u32 ieee80211_idle_off(struct ieee80211_local *local);
1595 void ieee80211_recalc_idle(struct ieee80211_local *local);
1596 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1597 				    const int offset);
1598 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
1599 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
1600 int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
1601 void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
1602 
1603 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1604 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
1605 			      bool update_bss);
1606 
ieee80211_sdata_running(struct ieee80211_sub_if_data * sdata)1607 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1608 {
1609 	return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1610 }
1611 
1612 /* tx handling */
1613 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1614 void ieee80211_tx_pending(unsigned long data);
1615 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1616 					 struct net_device *dev);
1617 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1618 				       struct net_device *dev);
1619 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
1620 				  struct net_device *dev,
1621 				  u32 info_flags);
1622 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1623 			      struct sk_buff_head *skbs);
1624 struct sk_buff *
1625 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
1626 			      struct sk_buff *skb, u32 info_flags);
1627 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
1628 			  struct ieee80211_supported_band *sband,
1629 			  int retry_count, int shift, bool send_to_cooked);
1630 
1631 void ieee80211_check_fast_xmit(struct sta_info *sta);
1632 void ieee80211_check_fast_xmit_all(struct ieee80211_local *local);
1633 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata);
1634 void ieee80211_clear_fast_xmit(struct sta_info *sta);
1635 
1636 /* HT */
1637 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
1638 				     struct ieee80211_sta_ht_cap *ht_cap);
1639 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
1640 				       struct ieee80211_supported_band *sband,
1641 				       const struct ieee80211_ht_cap *ht_cap_ie,
1642 				       struct sta_info *sta);
1643 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1644 			  const u8 *da, u16 tid,
1645 			  u16 initiator, u16 reason_code);
1646 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1647 			       enum ieee80211_smps_mode smps, const u8 *da,
1648 			       const u8 *bssid);
1649 void ieee80211_request_smps_ap_work(struct work_struct *work);
1650 void ieee80211_request_smps_mgd_work(struct work_struct *work);
1651 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
1652 				   enum ieee80211_smps_mode smps_mode_new);
1653 
1654 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1655 				     u16 initiator, u16 reason, bool stop);
1656 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1657 				    u16 initiator, u16 reason, bool stop);
1658 void __ieee80211_start_rx_ba_session(struct sta_info *sta,
1659 				     u8 dialog_token, u16 timeout,
1660 				     u16 start_seq_num, u16 ba_policy, u16 tid,
1661 				     u16 buf_size, bool tx, bool auto_seq);
1662 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
1663 					 enum ieee80211_agg_stop_reason reason);
1664 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1665 			     struct sta_info *sta,
1666 			     struct ieee80211_mgmt *mgmt, size_t len);
1667 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1668 				  struct sta_info *sta,
1669 				  struct ieee80211_mgmt *mgmt,
1670 				  size_t len);
1671 void ieee80211_process_addba_request(struct ieee80211_local *local,
1672 				     struct sta_info *sta,
1673 				     struct ieee80211_mgmt *mgmt,
1674 				     size_t len);
1675 
1676 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1677 				   enum ieee80211_agg_stop_reason reason);
1678 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1679 				    enum ieee80211_agg_stop_reason reason);
1680 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1681 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1682 void ieee80211_ba_session_work(struct work_struct *work);
1683 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1684 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1685 
1686 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);
1687 
1688 /* VHT */
1689 void
1690 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
1691 				    struct ieee80211_supported_band *sband,
1692 				    const struct ieee80211_vht_cap *vht_cap_ie,
1693 				    struct sta_info *sta);
1694 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta);
1695 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
1696 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1697 enum ieee80211_sta_rx_bandwidth
1698 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width);
1699 enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta);
1700 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1701 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1702                                   struct sta_info *sta, u8 opmode,
1703 				  enum ieee80211_band band);
1704 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1705 				 struct sta_info *sta, u8 opmode,
1706 				 enum ieee80211_band band);
1707 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
1708 				      struct ieee80211_sta_vht_cap *vht_cap);
1709 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
1710 				     u16 vht_mask[NL80211_VHT_NSS_MAX]);
1711 
1712 /* Spectrum management */
1713 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1714 				       struct ieee80211_mgmt *mgmt,
1715 				       size_t len);
1716 /**
1717  * ieee80211_parse_ch_switch_ie - parses channel switch IEs
1718  * @sdata: the sdata of the interface which has received the frame
1719  * @elems: parsed 802.11 elements received with the frame
1720  * @current_band: indicates the current band
1721  * @sta_flags: contains information about own capabilities and restrictions
1722  *	to decide which channel switch announcements can be accepted. Only the
1723  *	following subset of &enum ieee80211_sta_flags are evaluated:
1724  *	%IEEE80211_STA_DISABLE_HT, %IEEE80211_STA_DISABLE_VHT,
1725  *	%IEEE80211_STA_DISABLE_40MHZ, %IEEE80211_STA_DISABLE_80P80MHZ,
1726  *	%IEEE80211_STA_DISABLE_160MHZ.
1727  * @bssid: the currently connected bssid (for reporting)
1728  * @csa_ie: parsed 802.11 csa elements on count, mode, chandef and mesh ttl.
1729 	All of them will be filled with if success only.
1730  * Return: 0 on success, <0 on error and >0 if there is nothing to parse.
1731  */
1732 int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
1733 				 struct ieee802_11_elems *elems,
1734 				 enum ieee80211_band current_band,
1735 				 u32 sta_flags, u8 *bssid,
1736 				 struct ieee80211_csa_ie *csa_ie);
1737 
1738 /* Suspend/resume and hw reconfiguration */
1739 int ieee80211_reconfig(struct ieee80211_local *local);
1740 void ieee80211_stop_device(struct ieee80211_local *local);
1741 
1742 int __ieee80211_suspend(struct ieee80211_hw *hw,
1743 			struct cfg80211_wowlan *wowlan);
1744 
__ieee80211_resume(struct ieee80211_hw * hw)1745 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1746 {
1747 	struct ieee80211_local *local = hw_to_local(hw);
1748 
1749 	WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) &&
1750 	     !test_bit(SCAN_COMPLETED, &local->scanning),
1751 		"%s: resume with hardware scan still in progress\n",
1752 		wiphy_name(hw->wiphy));
1753 
1754 	return ieee80211_reconfig(hw_to_local(hw));
1755 }
1756 
1757 /* utility functions/constants */
1758 extern const void *const mac80211_wiphy_privid; /* for wiphy privid */
1759 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
1760 			     int rate, int erp, int short_preamble,
1761 			     int shift);
1762 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1763 			       bool bss_notify, bool enable_qos);
1764 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1765 		    struct sta_info *sta, struct sk_buff *skb);
1766 
1767 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1768 				 struct sk_buff *skb, int tid,
1769 				 enum ieee80211_band band);
1770 
1771 static inline void
ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,int tid,enum ieee80211_band band)1772 ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1773 			  struct sk_buff *skb, int tid,
1774 			  enum ieee80211_band band)
1775 {
1776 	rcu_read_lock();
1777 	__ieee80211_tx_skb_tid_band(sdata, skb, tid, band);
1778 	rcu_read_unlock();
1779 }
1780 
ieee80211_tx_skb_tid(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,int tid)1781 static inline void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
1782 					struct sk_buff *skb, int tid)
1783 {
1784 	struct ieee80211_chanctx_conf *chanctx_conf;
1785 
1786 	rcu_read_lock();
1787 	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1788 	if (WARN_ON(!chanctx_conf)) {
1789 		rcu_read_unlock();
1790 		kfree_skb(skb);
1791 		return;
1792 	}
1793 
1794 	__ieee80211_tx_skb_tid_band(sdata, skb, tid,
1795 				    chanctx_conf->def.chan->band);
1796 	rcu_read_unlock();
1797 }
1798 
ieee80211_tx_skb(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)1799 static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
1800 				    struct sk_buff *skb)
1801 {
1802 	/* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
1803 	ieee80211_tx_skb_tid(sdata, skb, 7);
1804 }
1805 
1806 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1807 			       struct ieee802_11_elems *elems,
1808 			       u64 filter, u32 crc);
ieee802_11_parse_elems(const u8 * start,size_t len,bool action,struct ieee802_11_elems * elems)1809 static inline void ieee802_11_parse_elems(const u8 *start, size_t len,
1810 					  bool action,
1811 					  struct ieee802_11_elems *elems)
1812 {
1813 	ieee802_11_parse_elems_crc(start, len, action, elems, 0, 0);
1814 }
1815 
ieee80211_rx_reorder_ready(struct sk_buff_head * frames)1816 static inline bool ieee80211_rx_reorder_ready(struct sk_buff_head *frames)
1817 {
1818 	struct sk_buff *tail = skb_peek_tail(frames);
1819 	struct ieee80211_rx_status *status;
1820 
1821 	if (!tail)
1822 		return false;
1823 
1824 	status = IEEE80211_SKB_RXCB(tail);
1825 	if (status->flag & RX_FLAG_AMSDU_MORE)
1826 		return false;
1827 
1828 	return true;
1829 }
1830 
1831 extern const int ieee802_1d_to_ac[8];
1832 
ieee80211_ac_from_tid(int tid)1833 static inline int ieee80211_ac_from_tid(int tid)
1834 {
1835 	return ieee802_1d_to_ac[tid & 7];
1836 }
1837 
1838 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1839 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1840 void ieee80211_dynamic_ps_timer(unsigned long data);
1841 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1842 			     struct ieee80211_sub_if_data *sdata,
1843 			     bool powersave);
1844 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1845 			     struct ieee80211_hdr *hdr);
1846 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1847 			     struct ieee80211_hdr *hdr, bool ack, u16 tx_time);
1848 
1849 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1850 				     unsigned long queues,
1851 				     enum queue_stop_reason reason,
1852 				     bool refcounted);
1853 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
1854 			       struct ieee80211_sub_if_data *sdata,
1855 			       enum queue_stop_reason reason);
1856 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
1857 			       struct ieee80211_sub_if_data *sdata,
1858 			       enum queue_stop_reason reason);
1859 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1860 				     unsigned long queues,
1861 				     enum queue_stop_reason reason,
1862 				     bool refcounted);
1863 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1864 				    enum queue_stop_reason reason,
1865 				    bool refcounted);
1866 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1867 				    enum queue_stop_reason reason,
1868 				    bool refcounted);
1869 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
1870 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1871 			       struct sk_buff *skb);
1872 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1873 				struct sk_buff_head *skbs);
1874 void ieee80211_flush_queues(struct ieee80211_local *local,
1875 			    struct ieee80211_sub_if_data *sdata, bool drop);
1876 void __ieee80211_flush_queues(struct ieee80211_local *local,
1877 			      struct ieee80211_sub_if_data *sdata,
1878 			      unsigned int queues, bool drop);
1879 
ieee80211_can_run_worker(struct ieee80211_local * local)1880 static inline bool ieee80211_can_run_worker(struct ieee80211_local *local)
1881 {
1882 	/*
1883 	 * If quiescing is set, we are racing with __ieee80211_suspend.
1884 	 * __ieee80211_suspend flushes the workers after setting quiescing,
1885 	 * and we check quiescing / suspended before enqueing new workers.
1886 	 * We should abort the worker to avoid the races below.
1887 	 */
1888 	if (local->quiescing)
1889 		return false;
1890 
1891 	/*
1892 	 * We might already be suspended if the following scenario occurs:
1893 	 * __ieee80211_suspend		Control path
1894 	 *
1895 	 *				if (local->quiescing)
1896 	 *					return;
1897 	 * local->quiescing = true;
1898 	 * flush_workqueue();
1899 	 *				queue_work(...);
1900 	 * local->suspended = true;
1901 	 * local->quiescing = false;
1902 	 *				worker starts running...
1903 	 */
1904 	if (local->suspended)
1905 		return false;
1906 
1907 	return true;
1908 }
1909 
1910 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
1911 			     struct sta_info *sta,
1912 			     struct txq_info *txq, int tid);
1913 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1914 			 u16 transaction, u16 auth_alg, u16 status,
1915 			 const u8 *extra, size_t extra_len, const u8 *bssid,
1916 			 const u8 *da, const u8 *key, u8 key_len, u8 key_idx,
1917 			 u32 tx_flags);
1918 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1919 				    const u8 *bssid, u16 stype, u16 reason,
1920 				    bool send_frame, u8 *frame_buf);
1921 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1922 			     size_t buffer_len,
1923 			     struct ieee80211_scan_ies *ie_desc,
1924 			     const u8 *ie, size_t ie_len,
1925 			     u8 bands_used, u32 *rate_masks,
1926 			     struct cfg80211_chan_def *chandef);
1927 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1928 					  const u8 *src, const u8 *dst,
1929 					  u32 ratemask,
1930 					  struct ieee80211_channel *chan,
1931 					  const u8 *ssid, size_t ssid_len,
1932 					  const u8 *ie, size_t ie_len,
1933 					  bool directed);
1934 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1935 			      const u8 *src, const u8 *dst,
1936 			      const u8 *ssid, size_t ssid_len,
1937 			      const u8 *ie, size_t ie_len,
1938 			      u32 ratemask, bool directed, u32 tx_flags,
1939 			      struct ieee80211_channel *channel, bool scan);
1940 
1941 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1942 			    struct ieee802_11_elems *elems,
1943 			    enum ieee80211_band band, u32 *basic_rates);
1944 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
1945 				 enum ieee80211_smps_mode smps_mode);
1946 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
1947 				enum ieee80211_smps_mode smps_mode);
1948 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata);
1949 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata);
1950 
1951 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1952 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1953 			      u16 cap);
1954 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1955 			       const struct cfg80211_chan_def *chandef,
1956 			       u16 prot_mode, bool rifs_mode);
1957 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1958 			       u32 cap);
1959 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1960 				const struct cfg80211_chan_def *chandef);
1961 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
1962 			     const struct ieee80211_supported_band *sband,
1963 			     const u8 *srates, int srates_len, u32 *rates);
1964 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1965 			    struct sk_buff *skb, bool need_basic,
1966 			    enum ieee80211_band band);
1967 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
1968 				struct sk_buff *skb, bool need_basic,
1969 				enum ieee80211_band band);
1970 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo);
1971 
1972 /* channel management */
1973 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1974 				  const struct ieee80211_ht_operation *ht_oper,
1975 				  struct cfg80211_chan_def *chandef);
1976 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
1977 				   const struct ieee80211_vht_operation *oper,
1978 				   struct cfg80211_chan_def *chandef);
1979 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c);
1980 
1981 int __must_check
1982 ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
1983 			  const struct cfg80211_chan_def *chandef,
1984 			  enum ieee80211_chanctx_mode mode);
1985 int __must_check
1986 ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata,
1987 			      const struct cfg80211_chan_def *chandef,
1988 			      enum ieee80211_chanctx_mode mode,
1989 			      bool radar_required);
1990 int __must_check
1991 ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata);
1992 int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata);
1993 
1994 int __must_check
1995 ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
1996 			       const struct cfg80211_chan_def *chandef,
1997 			       u32 *changed);
1998 void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
1999 void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
2000 void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
2001 					 bool clear);
2002 int ieee80211_chanctx_refcount(struct ieee80211_local *local,
2003 			       struct ieee80211_chanctx *ctx);
2004 
2005 void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
2006 				   struct ieee80211_chanctx *chanctx);
2007 void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
2008 				      struct ieee80211_chanctx *ctx);
2009 bool ieee80211_is_radar_required(struct ieee80211_local *local);
2010 
2011 void ieee80211_dfs_cac_timer(unsigned long data);
2012 void ieee80211_dfs_cac_timer_work(struct work_struct *work);
2013 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local);
2014 void ieee80211_dfs_radar_detected_work(struct work_struct *work);
2015 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2016 			      struct cfg80211_csa_settings *csa_settings);
2017 
2018 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs);
2019 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n);
2020 const struct ieee80211_cipher_scheme *
2021 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2022 		 enum nl80211_iftype iftype);
2023 int ieee80211_cs_headroom(struct ieee80211_local *local,
2024 			  struct cfg80211_crypto_settings *crypto,
2025 			  enum nl80211_iftype iftype);
2026 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2027 			   struct ieee80211_sub_if_data *sdata);
2028 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2029 				 const struct cfg80211_chan_def *chandef,
2030 				 enum ieee80211_chanctx_mode chanmode,
2031 				 u8 radar_detect);
2032 int ieee80211_max_num_channels(struct ieee80211_local *local);
2033 enum nl80211_chan_width ieee80211_get_sta_bw(struct ieee80211_sta *sta);
2034 void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
2035 				       struct ieee80211_chanctx *ctx);
2036 
2037 /* TDLS */
2038 int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
2039 			const u8 *peer, u8 action_code, u8 dialog_token,
2040 			u16 status_code, u32 peer_capability,
2041 			bool initiator, const u8 *extra_ies,
2042 			size_t extra_ies_len);
2043 int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
2044 			const u8 *peer, enum nl80211_tdls_operation oper);
2045 void ieee80211_tdls_peer_del_work(struct work_struct *wk);
2046 int ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
2047 				  const u8 *addr, u8 oper_class,
2048 				  struct cfg80211_chan_def *chandef);
2049 void ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
2050 					  struct net_device *dev,
2051 					  const u8 *addr);
2052 void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata);
2053 void ieee80211_tdls_chsw_work(struct work_struct *wk);
2054 void ieee80211_tdls_handle_disconnect(struct ieee80211_sub_if_data *sdata,
2055 				      const u8 *peer, u16 reason);
2056 const char *ieee80211_get_reason_code_string(u16 reason_code);
2057 
2058 extern const struct ethtool_ops ieee80211_ethtool_ops;
2059 
2060 #ifdef CONFIG_MAC80211_NOINLINE
2061 #define debug_noinline noinline
2062 #else
2063 #define debug_noinline
2064 #endif
2065 
2066 void ieee80211_init_frag_cache(struct ieee80211_fragment_cache *cache);
2067 void ieee80211_destroy_frag_cache(struct ieee80211_fragment_cache *cache);
2068 
2069 #endif /* IEEE80211_I_H */
2070