1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright 2002-2005, Instant802 Networks, Inc.
4  * Copyright 2005, Devicescape Software, Inc.
5  * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
6  * Copyright 2007-2010	Johannes Berg <johannes@sipsolutions.net>
7  * Copyright 2013-2015  Intel Mobile Communications GmbH
8  * Copyright (C) 2018-2022 Intel Corporation
9  */
10 
11 #ifndef IEEE80211_I_H
12 #define IEEE80211_I_H
13 
14 #include <linux/kernel.h>
15 #include <linux/device.h>
16 #include <linux/if_ether.h>
17 #include <linux/interrupt.h>
18 #include <linux/list.h>
19 #include <linux/netdevice.h>
20 #include <linux/skbuff.h>
21 #include <linux/workqueue.h>
22 #include <linux/types.h>
23 #include <linux/spinlock.h>
24 #include <linux/etherdevice.h>
25 #include <linux/leds.h>
26 #include <linux/idr.h>
27 #include <linux/rhashtable.h>
28 #include <linux/rbtree.h>
29 #include <net/ieee80211_radiotap.h>
30 #include <net/cfg80211.h>
31 #include <net/mac80211.h>
32 #include <net/fq.h>
33 #include "key.h"
34 #include "sta_info.h"
35 #include "debug.h"
36 #include "drop.h"
37 
38 extern const struct cfg80211_ops mac80211_config_ops;
39 
40 struct ieee80211_local;
41 struct ieee80211_mesh_fast_tx;
42 
43 /* Maximum number of broadcast/multicast frames to buffer when some of the
44  * associated stations are using power saving. */
45 #define AP_MAX_BC_BUFFER 128
46 
47 /* Maximum number of frames buffered to all STAs, including multicast frames.
48  * Note: increasing this limit increases the potential memory requirement. Each
49  * frame can be up to about 2 kB long. */
50 #define TOTAL_MAX_TX_BUFFER 512
51 
52 /* Required encryption head and tailroom */
53 #define IEEE80211_ENCRYPT_HEADROOM 8
54 #define IEEE80211_ENCRYPT_TAILROOM 18
55 
56 /* power level hasn't been configured (or set to automatic) */
57 #define IEEE80211_UNSET_POWER_LEVEL	INT_MIN
58 
59 /*
60  * Some APs experience problems when working with U-APSD. Decreasing the
61  * probability of that happening by using legacy mode for all ACs but VO isn't
62  * enough.
63  *
64  * Cisco 4410N originally forced us to enable VO by default only because it
65  * treated non-VO ACs as legacy.
66  *
67  * However some APs (notably Netgear R7000) silently reclassify packets to
68  * different ACs. Since u-APSD ACs require trigger frames for frame retrieval
69  * clients would never see some frames (e.g. ARP responses) or would fetch them
70  * accidentally after a long time.
71  *
72  * It makes little sense to enable u-APSD queues by default because it needs
73  * userspace applications to be aware of it to actually take advantage of the
74  * possible additional powersavings. Implicitly depending on driver autotrigger
75  * frame support doesn't make much sense.
76  */
77 #define IEEE80211_DEFAULT_UAPSD_QUEUES 0
78 
79 #define IEEE80211_DEFAULT_MAX_SP_LEN		\
80 	IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
81 
82 extern const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS];
83 
84 #define IEEE80211_DEAUTH_FRAME_LEN	(24 /* hdr */ + 2 /* reason */)
85 
86 #define IEEE80211_MAX_NAN_INSTANCE_ID 255
87 
88 
89 /*
90  * Keep a station's queues on the active list for deficit accounting purposes
91  * if it was active or queued during the last 100ms
92  */
93 #define AIRTIME_ACTIVE_DURATION (HZ / 10)
94 
95 struct ieee80211_bss {
96 	u32 device_ts_beacon, device_ts_presp;
97 
98 	bool wmm_used;
99 	bool uapsd_supported;
100 
101 #define IEEE80211_MAX_SUPP_RATES 32
102 	u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
103 	size_t supp_rates_len;
104 	struct ieee80211_rate *beacon_rate;
105 
106 	u32 vht_cap_info;
107 
108 	/*
109 	 * During association, we save an ERP value from a probe response so
110 	 * that we can feed ERP info to the driver when handling the
111 	 * association completes. these fields probably won't be up-to-date
112 	 * otherwise, you probably don't want to use them.
113 	 */
114 	bool has_erp_value;
115 	u8 erp_value;
116 
117 	/* Keep track of the corruption of the last beacon/probe response. */
118 	u8 corrupt_data;
119 
120 	/* Keep track of what bits of information we have valid info for. */
121 	u8 valid_data;
122 };
123 
124 /**
125  * enum ieee80211_corrupt_data_flags - BSS data corruption flags
126  * @IEEE80211_BSS_CORRUPT_BEACON: last beacon frame received was corrupted
127  * @IEEE80211_BSS_CORRUPT_PROBE_RESP: last probe response received was corrupted
128  *
129  * These are bss flags that are attached to a bss in the
130  * @corrupt_data field of &struct ieee80211_bss.
131  */
132 enum ieee80211_bss_corrupt_data_flags {
133 	IEEE80211_BSS_CORRUPT_BEACON		= BIT(0),
134 	IEEE80211_BSS_CORRUPT_PROBE_RESP	= BIT(1)
135 };
136 
137 /**
138  * enum ieee80211_valid_data_flags - BSS valid data flags
139  * @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
140  * @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
141  * @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
142  *
143  * These are bss flags that are attached to a bss in the
144  * @valid_data field of &struct ieee80211_bss.  They show which parts
145  * of the data structure were received as a result of an un-corrupted
146  * beacon/probe response.
147  */
148 enum ieee80211_bss_valid_data_flags {
149 	IEEE80211_BSS_VALID_WMM			= BIT(1),
150 	IEEE80211_BSS_VALID_RATES		= BIT(2),
151 	IEEE80211_BSS_VALID_ERP			= BIT(3)
152 };
153 
154 typedef unsigned __bitwise ieee80211_tx_result;
155 #define TX_CONTINUE	((__force ieee80211_tx_result) 0u)
156 #define TX_DROP		((__force ieee80211_tx_result) 1u)
157 #define TX_QUEUED	((__force ieee80211_tx_result) 2u)
158 
159 #define IEEE80211_TX_UNICAST		BIT(1)
160 #define IEEE80211_TX_PS_BUFFERED	BIT(2)
161 
162 struct ieee80211_tx_data {
163 	struct sk_buff *skb;
164 	struct sk_buff_head skbs;
165 	struct ieee80211_local *local;
166 	struct ieee80211_sub_if_data *sdata;
167 	struct sta_info *sta;
168 	struct ieee80211_key *key;
169 	struct ieee80211_tx_rate rate;
170 
171 	unsigned int flags;
172 };
173 
174 /**
175  * enum ieee80211_packet_rx_flags - packet RX flags
176  * @IEEE80211_RX_AMSDU: a-MSDU packet
177  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
178  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
179  *
180  * These are per-frame flags that are attached to a frame in the
181  * @rx_flags field of &struct ieee80211_rx_status.
182  */
183 enum ieee80211_packet_rx_flags {
184 	IEEE80211_RX_AMSDU			= BIT(3),
185 	IEEE80211_RX_MALFORMED_ACTION_FRM	= BIT(4),
186 	IEEE80211_RX_DEFERRED_RELEASE		= BIT(5),
187 };
188 
189 /**
190  * enum ieee80211_rx_flags - RX data flags
191  *
192  * @IEEE80211_RX_CMNTR: received on cooked monitor already
193  * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
194  *	to cfg80211_report_obss_beacon().
195  *
196  * These flags are used across handling multiple interfaces
197  * for a single frame.
198  */
199 enum ieee80211_rx_flags {
200 	IEEE80211_RX_CMNTR		= BIT(0),
201 	IEEE80211_RX_BEACON_REPORTED	= BIT(1),
202 };
203 
204 struct ieee80211_rx_data {
205 	struct list_head *list;
206 	struct sk_buff *skb;
207 	struct ieee80211_local *local;
208 	struct ieee80211_sub_if_data *sdata;
209 	struct ieee80211_link_data *link;
210 	struct sta_info *sta;
211 	struct link_sta_info *link_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 	int link_id;
232 
233 	union {
234 		struct {
235 			u32 iv32;
236 			u16 iv16;
237 		} tkip;
238 		struct {
239 			u8 pn[IEEE80211_CCMP_PN_LEN];
240 		} ccm_gcm;
241 	};
242 };
243 
244 struct ieee80211_csa_settings {
245 	const u16 *counter_offsets_beacon;
246 	const u16 *counter_offsets_presp;
247 
248 	int n_counter_offsets_beacon;
249 	int n_counter_offsets_presp;
250 
251 	u8 count;
252 };
253 
254 struct ieee80211_color_change_settings {
255 	u16 counter_offset_beacon;
256 	u16 counter_offset_presp;
257 	u8 count;
258 };
259 
260 struct beacon_data {
261 	u8 *head, *tail;
262 	int head_len, tail_len;
263 	struct ieee80211_meshconf_ie *meshconf;
264 	u16 cntdwn_counter_offsets[IEEE80211_MAX_CNTDWN_COUNTERS_NUM];
265 	u8 cntdwn_current_counter;
266 	struct cfg80211_mbssid_elems *mbssid_ies;
267 	struct cfg80211_rnr_elems *rnr_ies;
268 	struct rcu_head rcu_head;
269 };
270 
271 struct probe_resp {
272 	struct rcu_head rcu_head;
273 	int len;
274 	u16 cntdwn_counter_offsets[IEEE80211_MAX_CNTDWN_COUNTERS_NUM];
275 	u8 data[];
276 };
277 
278 struct fils_discovery_data {
279 	struct rcu_head rcu_head;
280 	int len;
281 	u8 data[];
282 };
283 
284 struct unsol_bcast_probe_resp_data {
285 	struct rcu_head rcu_head;
286 	int len;
287 	u8 data[];
288 };
289 
290 struct ps_data {
291 	/* yes, this looks ugly, but guarantees that we can later use
292 	 * bitmap_empty :)
293 	 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
294 	u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]
295 			__aligned(__alignof__(unsigned long));
296 	struct sk_buff_head bc_buf;
297 	atomic_t num_sta_ps; /* number of stations in PS mode */
298 	int dtim_count;
299 	bool dtim_bc_mc;
300 };
301 
302 struct ieee80211_if_ap {
303 	struct list_head vlans; /* write-protected with RTNL and local->mtx */
304 
305 	struct ps_data ps;
306 	atomic_t num_mcast_sta; /* number of stations receiving multicast */
307 
308 	bool multicast_to_unicast;
309 	bool active;
310 };
311 
312 struct ieee80211_if_vlan {
313 	struct list_head list; /* write-protected with RTNL and local->mtx */
314 
315 	/* used for all tx if the VLAN is configured to 4-addr mode */
316 	struct sta_info __rcu *sta;
317 	atomic_t num_mcast_sta; /* number of stations receiving multicast */
318 };
319 
320 struct mesh_stats {
321 	__u32 fwded_mcast;		/* Mesh forwarded multicast frames */
322 	__u32 fwded_unicast;		/* Mesh forwarded unicast frames */
323 	__u32 fwded_frames;		/* Mesh total forwarded frames */
324 	__u32 dropped_frames_ttl;	/* Not transmitted since mesh_ttl == 0*/
325 	__u32 dropped_frames_no_route;	/* Not transmitted, no route found */
326 };
327 
328 #define PREQ_Q_F_START		0x1
329 #define PREQ_Q_F_REFRESH	0x2
330 struct mesh_preq_queue {
331 	struct list_head list;
332 	u8 dst[ETH_ALEN];
333 	u8 flags;
334 };
335 
336 struct ieee80211_roc_work {
337 	struct list_head list;
338 
339 	struct ieee80211_sub_if_data *sdata;
340 
341 	struct ieee80211_channel *chan;
342 
343 	bool started, abort, hw_begun, notified;
344 	bool on_channel;
345 
346 	unsigned long start_time;
347 
348 	u32 duration, req_duration;
349 	struct sk_buff *frame;
350 	u64 cookie, mgmt_tx_cookie;
351 	enum ieee80211_roc_type type;
352 };
353 
354 /* flags used in struct ieee80211_if_managed.flags */
355 enum ieee80211_sta_flags {
356 	IEEE80211_STA_CONNECTION_POLL	= BIT(1),
357 	IEEE80211_STA_CONTROL_PORT	= BIT(2),
358 	IEEE80211_STA_MFP_ENABLED	= BIT(6),
359 	IEEE80211_STA_UAPSD_ENABLED	= BIT(7),
360 	IEEE80211_STA_NULLFUNC_ACKED	= BIT(8),
361 	IEEE80211_STA_ENABLE_RRM	= BIT(15),
362 };
363 
364 typedef u32 __bitwise ieee80211_conn_flags_t;
365 
366 enum ieee80211_conn_flags {
367 	IEEE80211_CONN_DISABLE_HT	= (__force ieee80211_conn_flags_t)BIT(0),
368 	IEEE80211_CONN_DISABLE_40MHZ	= (__force ieee80211_conn_flags_t)BIT(1),
369 	IEEE80211_CONN_DISABLE_VHT	= (__force ieee80211_conn_flags_t)BIT(2),
370 	IEEE80211_CONN_DISABLE_80P80MHZ	= (__force ieee80211_conn_flags_t)BIT(3),
371 	IEEE80211_CONN_DISABLE_160MHZ	= (__force ieee80211_conn_flags_t)BIT(4),
372 	IEEE80211_CONN_DISABLE_HE	= (__force ieee80211_conn_flags_t)BIT(5),
373 	IEEE80211_CONN_DISABLE_EHT	= (__force ieee80211_conn_flags_t)BIT(6),
374 	IEEE80211_CONN_DISABLE_320MHZ	= (__force ieee80211_conn_flags_t)BIT(7),
375 };
376 
377 struct ieee80211_mgd_auth_data {
378 	struct cfg80211_bss *bss;
379 	unsigned long timeout;
380 	int tries;
381 	u16 algorithm, expected_transaction;
382 
383 	u8 key[WLAN_KEY_LEN_WEP104];
384 	u8 key_len, key_idx;
385 	bool done, waiting;
386 	bool peer_confirmed;
387 	bool timeout_started;
388 	int link_id;
389 
390 	u8 ap_addr[ETH_ALEN] __aligned(2);
391 
392 	u16 sae_trans, sae_status;
393 	size_t data_len;
394 	u8 data[];
395 };
396 
397 struct ieee80211_mgd_assoc_data {
398 	struct {
399 		struct cfg80211_bss *bss;
400 
401 		u8 addr[ETH_ALEN] __aligned(2);
402 
403 		u8 ap_ht_param;
404 
405 		struct ieee80211_vht_cap ap_vht_cap;
406 
407 		size_t elems_len;
408 		u8 *elems; /* pointing to inside ie[] below */
409 
410 		ieee80211_conn_flags_t conn_flags;
411 
412 		u16 status;
413 
414 		bool disabled;
415 	} link[IEEE80211_MLD_MAX_NUM_LINKS];
416 
417 	u8 ap_addr[ETH_ALEN] __aligned(2);
418 
419 	/* this is for a workaround, so we use it only for non-MLO */
420 	const u8 *supp_rates;
421 	u8 supp_rates_len;
422 
423 	unsigned long timeout;
424 	int tries;
425 
426 	u8 prev_ap_addr[ETH_ALEN];
427 	u8 ssid[IEEE80211_MAX_SSID_LEN];
428 	u8 ssid_len;
429 	bool wmm, uapsd;
430 	bool need_beacon;
431 	bool synced;
432 	bool timeout_started;
433 	bool s1g;
434 
435 	unsigned int assoc_link_id;
436 
437 	u8 fils_nonces[2 * FILS_NONCE_LEN];
438 	u8 fils_kek[FILS_MAX_KEK_LEN];
439 	size_t fils_kek_len;
440 
441 	size_t ie_len;
442 	u8 *ie_pos; /* used to fill ie[] with link[].elems */
443 	u8 ie[];
444 };
445 
446 struct ieee80211_sta_tx_tspec {
447 	/* timestamp of the first packet in the time slice */
448 	unsigned long time_slice_start;
449 
450 	u32 admitted_time; /* in usecs, unlike over the air */
451 	u8 tsid;
452 	s8 up; /* signed to be able to invalidate with -1 during teardown */
453 
454 	/* consumed TX time in microseconds in the time slice */
455 	u32 consumed_tx_time;
456 	enum {
457 		TX_TSPEC_ACTION_NONE = 0,
458 		TX_TSPEC_ACTION_DOWNGRADE,
459 		TX_TSPEC_ACTION_STOP_DOWNGRADE,
460 	} action;
461 	bool downgraded;
462 };
463 
464 DECLARE_EWMA(beacon_signal, 4, 4)
465 
466 struct ieee80211_if_managed {
467 	struct timer_list timer;
468 	struct timer_list conn_mon_timer;
469 	struct timer_list bcn_mon_timer;
470 	struct work_struct monitor_work;
471 	struct wiphy_work beacon_connection_loss_work;
472 	struct wiphy_work csa_connection_drop_work;
473 
474 	unsigned long beacon_timeout;
475 	unsigned long probe_timeout;
476 	int probe_send_count;
477 	bool nullfunc_failed;
478 	u8 connection_loss:1,
479 	   driver_disconnect:1,
480 	   reconnect:1,
481 	   associated:1;
482 
483 	struct ieee80211_mgd_auth_data *auth_data;
484 	struct ieee80211_mgd_assoc_data *assoc_data;
485 
486 	bool powersave; /* powersave requested for this iface */
487 	bool broken_ap; /* AP is broken -- turn off powersave */
488 
489 	unsigned int flags;
490 
491 	bool status_acked;
492 	bool status_received;
493 	__le16 status_fc;
494 
495 	enum {
496 		IEEE80211_MFP_DISABLED,
497 		IEEE80211_MFP_OPTIONAL,
498 		IEEE80211_MFP_REQUIRED
499 	} mfp; /* management frame protection */
500 
501 	/*
502 	 * Bitmask of enabled u-apsd queues,
503 	 * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
504 	 * to take effect.
505 	 */
506 	unsigned int uapsd_queues;
507 
508 	/*
509 	 * Maximum number of buffered frames AP can deliver during a
510 	 * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
511 	 * Needs a new association to take effect.
512 	 */
513 	unsigned int uapsd_max_sp_len;
514 
515 	u8 use_4addr;
516 
517 	/*
518 	 * State variables for keeping track of RSSI of the AP currently
519 	 * connected to and informing driver when RSSI has gone
520 	 * below/above a certain threshold.
521 	 */
522 	int rssi_min_thold, rssi_max_thold;
523 
524 	struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
525 	struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
526 	struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
527 	struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
528 	struct ieee80211_s1g_cap s1g_capa; /* configured S1G overrides */
529 	struct ieee80211_s1g_cap s1g_capa_mask; /* valid s1g_capa bits */
530 
531 	/* TDLS support */
532 	u8 tdls_peer[ETH_ALEN] __aligned(2);
533 	struct delayed_work tdls_peer_del_work;
534 	struct sk_buff *orig_teardown_skb; /* The original teardown skb */
535 	struct sk_buff *teardown_skb; /* A copy to send through the AP */
536 	spinlock_t teardown_lock; /* To lock changing teardown_skb */
537 	bool tdls_wider_bw_prohibited;
538 
539 	/* WMM-AC TSPEC support */
540 	struct ieee80211_sta_tx_tspec tx_tspec[IEEE80211_NUM_ACS];
541 	/* Use a separate work struct so that we can do something here
542 	 * while the sdata->work is flushing the queues, for example.
543 	 * otherwise, in scenarios where we hardly get any traffic out
544 	 * on the BE queue, but there's a lot of VO traffic, we might
545 	 * get stuck in a downgraded situation and flush takes forever.
546 	 */
547 	struct delayed_work tx_tspec_wk;
548 
549 	/* Information elements from the last transmitted (Re)Association
550 	 * Request frame.
551 	 */
552 	u8 *assoc_req_ies;
553 	size_t assoc_req_ies_len;
554 
555 	struct wiphy_delayed_work ml_reconf_work;
556 	u16 removed_links;
557 };
558 
559 struct ieee80211_if_ibss {
560 	struct timer_list timer;
561 	struct wiphy_work csa_connection_drop_work;
562 
563 	unsigned long last_scan_completed;
564 
565 	u32 basic_rates;
566 
567 	bool fixed_bssid;
568 	bool fixed_channel;
569 	bool privacy;
570 
571 	bool control_port;
572 	bool userspace_handles_dfs;
573 
574 	u8 bssid[ETH_ALEN] __aligned(2);
575 	u8 ssid[IEEE80211_MAX_SSID_LEN];
576 	u8 ssid_len, ie_len;
577 	u8 *ie;
578 	struct cfg80211_chan_def chandef;
579 
580 	unsigned long ibss_join_req;
581 	/* probe response/beacon for IBSS */
582 	struct beacon_data __rcu *presp;
583 
584 	struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
585 	struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
586 
587 	spinlock_t incomplete_lock;
588 	struct list_head incomplete_stations;
589 
590 	enum {
591 		IEEE80211_IBSS_MLME_SEARCH,
592 		IEEE80211_IBSS_MLME_JOINED,
593 	} state;
594 };
595 
596 /**
597  * struct ieee80211_if_ocb - OCB mode state
598  *
599  * @housekeeping_timer: timer for periodic invocation of a housekeeping task
600  * @wrkq_flags: OCB deferred task action
601  * @incomplete_lock: delayed STA insertion lock
602  * @incomplete_stations: list of STAs waiting for delayed insertion
603  * @joined: indication if the interface is connected to an OCB network
604  */
605 struct ieee80211_if_ocb {
606 	struct timer_list housekeeping_timer;
607 	unsigned long wrkq_flags;
608 
609 	spinlock_t incomplete_lock;
610 	struct list_head incomplete_stations;
611 
612 	bool joined;
613 };
614 
615 /**
616  * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
617  *
618  * these declarations define the interface, which enables
619  * vendor-specific mesh synchronization
620  *
621  */
622 struct ieee802_11_elems;
623 struct ieee80211_mesh_sync_ops {
624 	void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata, u16 stype,
625 			     struct ieee80211_mgmt *mgmt, unsigned int len,
626 			     const struct ieee80211_meshconf_ie *mesh_cfg,
627 			     struct ieee80211_rx_status *rx_status);
628 
629 	/* should be called with beacon_data under RCU read lock */
630 	void (*adjust_tsf)(struct ieee80211_sub_if_data *sdata,
631 			   struct beacon_data *beacon);
632 	/* add other framework functions here */
633 };
634 
635 struct mesh_csa_settings {
636 	struct rcu_head rcu_head;
637 	struct cfg80211_csa_settings settings;
638 };
639 
640 /**
641  * struct mesh_table
642  *
643  * @known_gates: list of known mesh gates and their mpaths by the station. The
644  * gate's mpath may or may not be resolved and active.
645  * @gates_lock: protects updates to known_gates
646  * @rhead: the rhashtable containing struct mesh_paths, keyed by dest addr
647  * @walk_head: linked list containing all mesh_path objects
648  * @walk_lock: lock protecting walk_head
649  * @entries: number of entries in the table
650  */
651 struct mesh_table {
652 	struct hlist_head known_gates;
653 	spinlock_t gates_lock;
654 	struct rhashtable rhead;
655 	struct hlist_head walk_head;
656 	spinlock_t walk_lock;
657 	atomic_t entries;		/* Up to MAX_MESH_NEIGHBOURS */
658 };
659 
660 /**
661  * struct mesh_tx_cache - mesh fast xmit header cache
662  *
663  * @rht: hash table containing struct ieee80211_mesh_fast_tx, using skb DA as key
664  * @walk_head: linked list containing all ieee80211_mesh_fast_tx objects
665  * @walk_lock: lock protecting walk_head and rht
666  */
667 struct mesh_tx_cache {
668 	struct rhashtable rht;
669 	struct hlist_head walk_head;
670 	spinlock_t walk_lock;
671 };
672 
673 struct ieee80211_if_mesh {
674 	struct timer_list housekeeping_timer;
675 	struct timer_list mesh_path_timer;
676 	struct timer_list mesh_path_root_timer;
677 
678 	unsigned long wrkq_flags;
679 	unsigned long mbss_changed[64 / BITS_PER_LONG];
680 
681 	bool userspace_handles_dfs;
682 
683 	u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
684 	size_t mesh_id_len;
685 	/* Active Path Selection Protocol Identifier */
686 	u8 mesh_pp_id;
687 	/* Active Path Selection Metric Identifier */
688 	u8 mesh_pm_id;
689 	/* Congestion Control Mode Identifier */
690 	u8 mesh_cc_id;
691 	/* Synchronization Protocol Identifier */
692 	u8 mesh_sp_id;
693 	/* Authentication Protocol Identifier */
694 	u8 mesh_auth_id;
695 	/* Local mesh Sequence Number */
696 	u32 sn;
697 	/* Last used PREQ ID */
698 	u32 preq_id;
699 	atomic_t mpaths;
700 	/* Timestamp of last SN update */
701 	unsigned long last_sn_update;
702 	/* Time when it's ok to send next PERR */
703 	unsigned long next_perr;
704 	/* Timestamp of last PREQ sent */
705 	unsigned long last_preq;
706 	struct mesh_rmc *rmc;
707 	spinlock_t mesh_preq_queue_lock;
708 	struct mesh_preq_queue preq_queue;
709 	int preq_queue_len;
710 	struct mesh_stats mshstats;
711 	struct mesh_config mshcfg;
712 	atomic_t estab_plinks;
713 	atomic_t mesh_seqnum;
714 	bool accepting_plinks;
715 	int num_gates;
716 	struct beacon_data __rcu *beacon;
717 	const u8 *ie;
718 	u8 ie_len;
719 	enum {
720 		IEEE80211_MESH_SEC_NONE = 0x0,
721 		IEEE80211_MESH_SEC_AUTHED = 0x1,
722 		IEEE80211_MESH_SEC_SECURED = 0x2,
723 	} security;
724 	bool user_mpm;
725 	/* Extensible Synchronization Framework */
726 	const struct ieee80211_mesh_sync_ops *sync_ops;
727 	s64 sync_offset_clockdrift_max;
728 	spinlock_t sync_offset_lock;
729 	/* mesh power save */
730 	enum nl80211_mesh_power_mode nonpeer_pm;
731 	int ps_peers_light_sleep;
732 	int ps_peers_deep_sleep;
733 	struct ps_data ps;
734 	/* Channel Switching Support */
735 	struct mesh_csa_settings __rcu *csa;
736 	enum {
737 		IEEE80211_MESH_CSA_ROLE_NONE,
738 		IEEE80211_MESH_CSA_ROLE_INIT,
739 		IEEE80211_MESH_CSA_ROLE_REPEATER,
740 	} csa_role;
741 	u8 chsw_ttl;
742 	u16 pre_value;
743 
744 	/* offset from skb->data while building IE */
745 	int meshconf_offset;
746 
747 	struct mesh_table mesh_paths;
748 	struct mesh_table mpp_paths; /* Store paths for MPP&MAP */
749 	int mesh_paths_generation;
750 	int mpp_paths_generation;
751 	struct mesh_tx_cache tx_cache;
752 };
753 
754 #ifdef CONFIG_MAC80211_MESH
755 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name)	\
756 	do { (msh)->mshstats.name++; } while (0)
757 #else
758 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
759 	do { } while (0)
760 #endif
761 
762 /**
763  * enum ieee80211_sub_if_data_flags - virtual interface flags
764  *
765  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
766  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
767  *	associated stations and deliver multicast frames both
768  *	back to wireless media and to the local net stack.
769  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
770  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
771  * @IEEE80211_SDATA_DISCONNECT_HW_RESTART: Disconnect after hardware restart
772  *  recovery
773  */
774 enum ieee80211_sub_if_data_flags {
775 	IEEE80211_SDATA_ALLMULTI		= BIT(0),
776 	IEEE80211_SDATA_DONT_BRIDGE_PACKETS	= BIT(3),
777 	IEEE80211_SDATA_DISCONNECT_RESUME	= BIT(4),
778 	IEEE80211_SDATA_IN_DRIVER		= BIT(5),
779 	IEEE80211_SDATA_DISCONNECT_HW_RESTART	= BIT(6),
780 };
781 
782 /**
783  * enum ieee80211_sdata_state_bits - virtual interface state bits
784  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
785  *	mirrors netif_running() but is separate for interface type
786  *	change handling while the interface is up
787  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
788  *	mode, so queues are stopped
789  * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
790  *	to offchannel, reset when offchannel returns
791  */
792 enum ieee80211_sdata_state_bits {
793 	SDATA_STATE_RUNNING,
794 	SDATA_STATE_OFFCHANNEL,
795 	SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
796 };
797 
798 /**
799  * enum ieee80211_chanctx_mode - channel context configuration mode
800  *
801  * @IEEE80211_CHANCTX_SHARED: channel context may be used by
802  *	multiple interfaces
803  * @IEEE80211_CHANCTX_EXCLUSIVE: channel context can be used
804  *	only by a single interface. This can be used for example for
805  *	non-fixed channel IBSS.
806  */
807 enum ieee80211_chanctx_mode {
808 	IEEE80211_CHANCTX_SHARED,
809 	IEEE80211_CHANCTX_EXCLUSIVE
810 };
811 
812 /**
813  * enum ieee80211_chanctx_replace_state - channel context replacement state
814  *
815  * This is used for channel context in-place reservations that require channel
816  * context switch/swap.
817  *
818  * @IEEE80211_CHANCTX_REPLACE_NONE: no replacement is taking place
819  * @IEEE80211_CHANCTX_WILL_BE_REPLACED: this channel context will be replaced
820  *	by a (not yet registered) channel context pointed by %replace_ctx.
821  * @IEEE80211_CHANCTX_REPLACES_OTHER: this (not yet registered) channel context
822  *	replaces an existing channel context pointed to by %replace_ctx.
823  */
824 enum ieee80211_chanctx_replace_state {
825 	IEEE80211_CHANCTX_REPLACE_NONE,
826 	IEEE80211_CHANCTX_WILL_BE_REPLACED,
827 	IEEE80211_CHANCTX_REPLACES_OTHER,
828 };
829 
830 struct ieee80211_chanctx {
831 	struct list_head list;
832 	struct rcu_head rcu_head;
833 
834 	struct list_head assigned_links;
835 	struct list_head reserved_links;
836 
837 	enum ieee80211_chanctx_replace_state replace_state;
838 	struct ieee80211_chanctx *replace_ctx;
839 
840 	enum ieee80211_chanctx_mode mode;
841 	bool driver_present;
842 
843 	struct ieee80211_chanctx_conf conf;
844 };
845 
846 struct mac80211_qos_map {
847 	struct cfg80211_qos_map qos_map;
848 	struct rcu_head rcu_head;
849 };
850 
851 enum txq_info_flags {
852 	IEEE80211_TXQ_STOP,
853 	IEEE80211_TXQ_AMPDU,
854 	IEEE80211_TXQ_NO_AMSDU,
855 	IEEE80211_TXQ_DIRTY,
856 };
857 
858 /**
859  * struct txq_info - per tid queue
860  *
861  * @tin: contains packets split into multiple flows
862  * @def_flow: used as a fallback flow when a packet destined to @tin hashes to
863  *	a fq_flow which is already owned by a different tin
864  * @def_cvars: codel vars for @def_flow
865  * @frags: used to keep fragments created after dequeue
866  * @schedule_order: used with ieee80211_local->active_txqs
867  * @schedule_round: counter to prevent infinite loops on TXQ scheduling
868  */
869 struct txq_info {
870 	struct fq_tin tin;
871 	struct codel_vars def_cvars;
872 	struct codel_stats cstats;
873 
874 	u16 schedule_round;
875 	struct list_head schedule_order;
876 
877 	struct sk_buff_head frags;
878 
879 	unsigned long flags;
880 
881 	/* keep last! */
882 	struct ieee80211_txq txq;
883 };
884 
885 struct ieee80211_if_mntr {
886 	u32 flags;
887 	u8 mu_follow_addr[ETH_ALEN] __aligned(2);
888 
889 	struct list_head list;
890 };
891 
892 /**
893  * struct ieee80211_if_nan - NAN state
894  *
895  * @conf: current NAN configuration
896  * @func_ids: a bitmap of available instance_id's
897  */
898 struct ieee80211_if_nan {
899 	struct cfg80211_nan_conf conf;
900 
901 	/* protects function_inst_ids */
902 	spinlock_t func_lock;
903 	struct idr function_inst_ids;
904 };
905 
906 struct ieee80211_link_data_managed {
907 	u8 bssid[ETH_ALEN] __aligned(2);
908 
909 	u8 dtim_period;
910 	enum ieee80211_smps_mode req_smps, /* requested smps mode */
911 				 driver_smps_mode; /* smps mode request */
912 
913 	ieee80211_conn_flags_t conn_flags;
914 
915 	s16 p2p_noa_index;
916 
917 	bool tdls_chan_switch_prohibited;
918 
919 	bool have_beacon;
920 	bool tracking_signal_avg;
921 	bool disable_wmm_tracking;
922 	bool operating_11g_mode;
923 
924 	bool csa_waiting_bcn;
925 	bool csa_ignored_same_chan;
926 	struct wiphy_delayed_work chswitch_work;
927 
928 	struct wiphy_work request_smps_work;
929 	bool beacon_crc_valid;
930 	u32 beacon_crc;
931 	struct ewma_beacon_signal ave_beacon_signal;
932 	int last_ave_beacon_signal;
933 
934 	/*
935 	 * Number of Beacon frames used in ave_beacon_signal. This can be used
936 	 * to avoid generating less reliable cqm events that would be based
937 	 * only on couple of received frames.
938 	 */
939 	unsigned int count_beacon_signal;
940 
941 	/* Number of times beacon loss was invoked. */
942 	unsigned int beacon_loss_count;
943 
944 	/*
945 	 * Last Beacon frame signal strength average (ave_beacon_signal / 16)
946 	 * that triggered a cqm event. 0 indicates that no event has been
947 	 * generated for the current association.
948 	 */
949 	int last_cqm_event_signal;
950 
951 	int wmm_last_param_set;
952 	int mu_edca_last_param_set;
953 
954 	u8 bss_param_ch_cnt;
955 
956 	struct cfg80211_bss *bss;
957 };
958 
959 struct ieee80211_link_data_ap {
960 	struct beacon_data __rcu *beacon;
961 	struct probe_resp __rcu *probe_resp;
962 	struct fils_discovery_data __rcu *fils_discovery;
963 	struct unsol_bcast_probe_resp_data __rcu *unsol_bcast_probe_resp;
964 
965 	/* to be used after channel switch. */
966 	struct cfg80211_beacon_data *next_beacon;
967 };
968 
969 struct ieee80211_link_data {
970 	struct ieee80211_sub_if_data *sdata;
971 	unsigned int link_id;
972 
973 	struct list_head assigned_chanctx_list; /* protected by chanctx_mtx */
974 	struct list_head reserved_chanctx_list; /* protected by chanctx_mtx */
975 
976 	/* multicast keys only */
977 	struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS +
978 					NUM_DEFAULT_MGMT_KEYS +
979 					NUM_DEFAULT_BEACON_KEYS];
980 	struct ieee80211_key __rcu *default_multicast_key;
981 	struct ieee80211_key __rcu *default_mgmt_key;
982 	struct ieee80211_key __rcu *default_beacon_key;
983 
984 	struct work_struct csa_finalize_work;
985 	bool csa_block_tx; /* write-protected by sdata_lock and local->mtx */
986 
987 	bool operating_11g_mode;
988 
989 	struct cfg80211_chan_def csa_chandef;
990 
991 	struct work_struct color_change_finalize_work;
992 	struct delayed_work color_collision_detect_work;
993 	u64 color_bitmap;
994 
995 	/* context reservation -- protected with chanctx_mtx */
996 	struct ieee80211_chanctx *reserved_chanctx;
997 	struct cfg80211_chan_def reserved_chandef;
998 	bool reserved_radar_required;
999 	bool reserved_ready;
1000 
1001 	u8 needed_rx_chains;
1002 	enum ieee80211_smps_mode smps_mode;
1003 
1004 	int user_power_level; /* in dBm */
1005 	int ap_power_level; /* in dBm */
1006 
1007 	bool radar_required;
1008 	struct delayed_work dfs_cac_timer_work;
1009 
1010 	union {
1011 		struct ieee80211_link_data_managed mgd;
1012 		struct ieee80211_link_data_ap ap;
1013 	} u;
1014 
1015 	struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
1016 
1017 	struct ieee80211_bss_conf *conf;
1018 
1019 #ifdef CONFIG_MAC80211_DEBUGFS
1020 	struct dentry *debugfs_dir;
1021 #endif
1022 };
1023 
1024 struct ieee80211_sub_if_data {
1025 	struct list_head list;
1026 
1027 	struct wireless_dev wdev;
1028 
1029 	/* keys */
1030 	struct list_head key_list;
1031 
1032 	/* count for keys needing tailroom space allocation */
1033 	int crypto_tx_tailroom_needed_cnt;
1034 	int crypto_tx_tailroom_pending_dec;
1035 	struct delayed_work dec_tailroom_needed_wk;
1036 
1037 	struct net_device *dev;
1038 	struct ieee80211_local *local;
1039 
1040 	unsigned int flags;
1041 
1042 	unsigned long state;
1043 
1044 	char name[IFNAMSIZ];
1045 
1046 	struct ieee80211_fragment_cache frags;
1047 
1048 	/* TID bitmap for NoAck policy */
1049 	u16 noack_map;
1050 
1051 	/* bit field of ACM bits (BIT(802.1D tag)) */
1052 	u8 wmm_acm;
1053 
1054 	struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS];
1055 	struct ieee80211_key __rcu *default_unicast_key;
1056 
1057 	u16 sequence_number;
1058 	u16 mld_mcast_seq;
1059 	__be16 control_port_protocol;
1060 	bool control_port_no_encrypt;
1061 	bool control_port_no_preauth;
1062 	bool control_port_over_nl80211;
1063 
1064 	atomic_t num_tx_queued;
1065 	struct mac80211_qos_map __rcu *qos_map;
1066 
1067 	/* used to reconfigure hardware SM PS */
1068 	struct work_struct recalc_smps;
1069 
1070 	struct wiphy_work work;
1071 	struct sk_buff_head skb_queue;
1072 	struct sk_buff_head status_queue;
1073 
1074 	/*
1075 	 * AP this belongs to: self in AP mode and
1076 	 * corresponding AP in VLAN mode, NULL for
1077 	 * all others (might be needed later in IBSS)
1078 	 */
1079 	struct ieee80211_if_ap *bss;
1080 
1081 	/* bitmap of allowed (non-MCS) rate indexes for rate control */
1082 	u32 rc_rateidx_mask[NUM_NL80211_BANDS];
1083 
1084 	bool rc_has_mcs_mask[NUM_NL80211_BANDS];
1085 	u8  rc_rateidx_mcs_mask[NUM_NL80211_BANDS][IEEE80211_HT_MCS_MASK_LEN];
1086 
1087 	bool rc_has_vht_mcs_mask[NUM_NL80211_BANDS];
1088 	u16 rc_rateidx_vht_mcs_mask[NUM_NL80211_BANDS][NL80211_VHT_NSS_MAX];
1089 
1090 	/* Beacon frame (non-MCS) rate (as a bitmap) */
1091 	u32 beacon_rateidx_mask[NUM_NL80211_BANDS];
1092 	bool beacon_rate_set;
1093 
1094 	union {
1095 		struct ieee80211_if_ap ap;
1096 		struct ieee80211_if_vlan vlan;
1097 		struct ieee80211_if_managed mgd;
1098 		struct ieee80211_if_ibss ibss;
1099 		struct ieee80211_if_mesh mesh;
1100 		struct ieee80211_if_ocb ocb;
1101 		struct ieee80211_if_mntr mntr;
1102 		struct ieee80211_if_nan nan;
1103 	} u;
1104 
1105 	struct ieee80211_link_data deflink;
1106 	struct ieee80211_link_data __rcu *link[IEEE80211_MLD_MAX_NUM_LINKS];
1107 
1108 	/* for ieee80211_set_active_links_async() */
1109 	struct work_struct activate_links_work;
1110 	u16 desired_active_links;
1111 
1112 #ifdef CONFIG_MAC80211_DEBUGFS
1113 	struct {
1114 		struct dentry *subdir_stations;
1115 		struct dentry *default_unicast_key;
1116 		struct dentry *default_multicast_key;
1117 		struct dentry *default_mgmt_key;
1118 		struct dentry *default_beacon_key;
1119 	} debugfs;
1120 #endif
1121 
1122 	/* must be last, dynamically sized area in this! */
1123 	struct ieee80211_vif vif;
1124 };
1125 
1126 static inline
vif_to_sdata(struct ieee80211_vif * p)1127 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
1128 {
1129 	return container_of(p, struct ieee80211_sub_if_data, vif);
1130 }
1131 
sdata_lock(struct ieee80211_sub_if_data * sdata)1132 static inline void sdata_lock(struct ieee80211_sub_if_data *sdata)
1133 	__acquires(&sdata->wdev.mtx)
1134 {
1135 	mutex_lock(&sdata->wdev.mtx);
1136 	__acquire(&sdata->wdev.mtx);
1137 }
1138 
sdata_unlock(struct ieee80211_sub_if_data * sdata)1139 static inline void sdata_unlock(struct ieee80211_sub_if_data *sdata)
1140 	__releases(&sdata->wdev.mtx)
1141 {
1142 	mutex_unlock(&sdata->wdev.mtx);
1143 	__release(&sdata->wdev.mtx);
1144 }
1145 
1146 #define sdata_dereference(p, sdata) \
1147 	rcu_dereference_protected(p, lockdep_is_held(&sdata->wdev.mtx))
1148 
1149 static inline void
sdata_assert_lock(struct ieee80211_sub_if_data * sdata)1150 sdata_assert_lock(struct ieee80211_sub_if_data *sdata)
1151 {
1152 	lockdep_assert_held(&sdata->wdev.mtx);
1153 }
1154 
1155 static inline int
ieee80211_chanwidth_get_shift(enum nl80211_chan_width width)1156 ieee80211_chanwidth_get_shift(enum nl80211_chan_width width)
1157 {
1158 	switch (width) {
1159 	case NL80211_CHAN_WIDTH_5:
1160 		return 2;
1161 	case NL80211_CHAN_WIDTH_10:
1162 		return 1;
1163 	default:
1164 		return 0;
1165 	}
1166 }
1167 
1168 static inline int
ieee80211_chandef_get_shift(struct cfg80211_chan_def * chandef)1169 ieee80211_chandef_get_shift(struct cfg80211_chan_def *chandef)
1170 {
1171 	return ieee80211_chanwidth_get_shift(chandef->width);
1172 }
1173 
1174 static inline int
ieee80211_vif_get_shift(struct ieee80211_vif * vif)1175 ieee80211_vif_get_shift(struct ieee80211_vif *vif)
1176 {
1177 	struct ieee80211_chanctx_conf *chanctx_conf;
1178 	int shift = 0;
1179 
1180 	rcu_read_lock();
1181 	chanctx_conf = rcu_dereference(vif->bss_conf.chanctx_conf);
1182 	if (chanctx_conf)
1183 		shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
1184 	rcu_read_unlock();
1185 
1186 	return shift;
1187 }
1188 
1189 static inline int
ieee80211_get_mbssid_beacon_len(struct cfg80211_mbssid_elems * elems,struct cfg80211_rnr_elems * rnr_elems,u8 i)1190 ieee80211_get_mbssid_beacon_len(struct cfg80211_mbssid_elems *elems,
1191 				struct cfg80211_rnr_elems *rnr_elems,
1192 				u8 i)
1193 {
1194 	int len = 0;
1195 
1196 	if (!elems || !elems->cnt || i > elems->cnt)
1197 		return 0;
1198 
1199 	if (i < elems->cnt) {
1200 		len = elems->elem[i].len;
1201 		if (rnr_elems) {
1202 			len += rnr_elems->elem[i].len;
1203 			for (i = elems->cnt; i < rnr_elems->cnt; i++)
1204 				len += rnr_elems->elem[i].len;
1205 		}
1206 		return len;
1207 	}
1208 
1209 	/* i == elems->cnt, calculate total length of all MBSSID elements */
1210 	for (i = 0; i < elems->cnt; i++)
1211 		len += elems->elem[i].len;
1212 
1213 	if (rnr_elems) {
1214 		for (i = 0; i < rnr_elems->cnt; i++)
1215 			len += rnr_elems->elem[i].len;
1216 	}
1217 
1218 	return len;
1219 }
1220 
1221 enum {
1222 	IEEE80211_RX_MSG	= 1,
1223 	IEEE80211_TX_STATUS_MSG	= 2,
1224 };
1225 
1226 enum queue_stop_reason {
1227 	IEEE80211_QUEUE_STOP_REASON_DRIVER,
1228 	IEEE80211_QUEUE_STOP_REASON_PS,
1229 	IEEE80211_QUEUE_STOP_REASON_CSA,
1230 	IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
1231 	IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1232 	IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
1233 	IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
1234 	IEEE80211_QUEUE_STOP_REASON_FLUSH,
1235 	IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN,
1236 	IEEE80211_QUEUE_STOP_REASON_RESERVE_TID,
1237 	IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE,
1238 
1239 	IEEE80211_QUEUE_STOP_REASONS,
1240 };
1241 
1242 #ifdef CONFIG_MAC80211_LEDS
1243 struct tpt_led_trigger {
1244 	char name[32];
1245 	const struct ieee80211_tpt_blink *blink_table;
1246 	unsigned int blink_table_len;
1247 	struct timer_list timer;
1248 	struct ieee80211_local *local;
1249 	unsigned long prev_traffic;
1250 	unsigned long tx_bytes, rx_bytes;
1251 	unsigned int active, want;
1252 	bool running;
1253 };
1254 #endif
1255 
1256 /**
1257  * mac80211 scan flags - currently active scan mode
1258  *
1259  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
1260  *	well be on the operating channel
1261  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
1262  *	determine if we are on the operating channel or not
1263  * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
1264  *	channel. This should not interrupt normal traffic.
1265  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
1266  *	that the scan completed.
1267  * @SCAN_ABORTED: Set for our scan work function when the driver reported
1268  *	a scan complete for an aborted scan.
1269  * @SCAN_HW_CANCELLED: Set for our scan work function when the scan is being
1270  *	cancelled.
1271  * @SCAN_BEACON_WAIT: Set whenever we're passive scanning because of radar/no-IR
1272  *	and could send a probe request after receiving a beacon.
1273  * @SCAN_BEACON_DONE: Beacon received, we can now send a probe request
1274  */
1275 enum {
1276 	SCAN_SW_SCANNING,
1277 	SCAN_HW_SCANNING,
1278 	SCAN_ONCHANNEL_SCANNING,
1279 	SCAN_COMPLETED,
1280 	SCAN_ABORTED,
1281 	SCAN_HW_CANCELLED,
1282 	SCAN_BEACON_WAIT,
1283 	SCAN_BEACON_DONE,
1284 };
1285 
1286 /**
1287  * enum mac80211_scan_state - scan state machine states
1288  *
1289  * @SCAN_DECISION: Main entry point to the scan state machine, this state
1290  *	determines if we should keep on scanning or switch back to the
1291  *	operating channel
1292  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
1293  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
1294  * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
1295  *	send out data
1296  * @SCAN_RESUME: Resume the scan and scan the next channel
1297  * @SCAN_ABORT: Abort the scan and go back to operating channel
1298  */
1299 enum mac80211_scan_state {
1300 	SCAN_DECISION,
1301 	SCAN_SET_CHANNEL,
1302 	SCAN_SEND_PROBE,
1303 	SCAN_SUSPEND,
1304 	SCAN_RESUME,
1305 	SCAN_ABORT,
1306 };
1307 
1308 DECLARE_STATIC_KEY_FALSE(aql_disable);
1309 
1310 struct ieee80211_local {
1311 	/* embed the driver visible part.
1312 	 * don't cast (use the static inlines below), but we keep
1313 	 * it first anyway so they become a no-op */
1314 	struct ieee80211_hw hw;
1315 
1316 	struct fq fq;
1317 	struct codel_vars *cvars;
1318 	struct codel_params cparams;
1319 
1320 	/* protects active_txqs and txqi->schedule_order */
1321 	spinlock_t active_txq_lock[IEEE80211_NUM_ACS];
1322 	struct list_head active_txqs[IEEE80211_NUM_ACS];
1323 	u16 schedule_round[IEEE80211_NUM_ACS];
1324 
1325 	/* serializes ieee80211_handle_wake_tx_queue */
1326 	spinlock_t handle_wake_tx_queue_lock;
1327 
1328 	u16 airtime_flags;
1329 	u32 aql_txq_limit_low[IEEE80211_NUM_ACS];
1330 	u32 aql_txq_limit_high[IEEE80211_NUM_ACS];
1331 	u32 aql_threshold;
1332 	atomic_t aql_total_pending_airtime;
1333 	atomic_t aql_ac_pending_airtime[IEEE80211_NUM_ACS];
1334 
1335 	const struct ieee80211_ops *ops;
1336 
1337 	/*
1338 	 * private workqueue to mac80211. mac80211 makes this accessible
1339 	 * via ieee80211_queue_work()
1340 	 */
1341 	struct workqueue_struct *workqueue;
1342 
1343 	unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
1344 	int q_stop_reasons[IEEE80211_MAX_QUEUES][IEEE80211_QUEUE_STOP_REASONS];
1345 	/* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
1346 	spinlock_t queue_stop_reason_lock;
1347 
1348 	int open_count;
1349 	int monitors, cooked_mntrs;
1350 	/* number of interfaces with corresponding FIF_ flags */
1351 	int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
1352 	    fif_probe_req;
1353 	bool probe_req_reg;
1354 	bool rx_mcast_action_reg;
1355 	unsigned int filter_flags; /* FIF_* */
1356 
1357 	bool wiphy_ciphers_allocated;
1358 
1359 	bool use_chanctx;
1360 
1361 	/* protects the aggregated multicast list and filter calls */
1362 	spinlock_t filter_lock;
1363 
1364 	/* used for uploading changed mc list */
1365 	struct work_struct reconfig_filter;
1366 
1367 	/* aggregated multicast list */
1368 	struct netdev_hw_addr_list mc_list;
1369 
1370 	bool tim_in_locked_section; /* see ieee80211_beacon_get() */
1371 
1372 	/*
1373 	 * suspended is true if we finished all the suspend _and_ we have
1374 	 * not yet come up from resume. This is to be used by mac80211
1375 	 * to ensure driver sanity during suspend and mac80211's own
1376 	 * sanity. It can eventually be used for WoW as well.
1377 	 */
1378 	bool suspended;
1379 
1380 	/* suspending is true during the whole suspend process */
1381 	bool suspending;
1382 
1383 	/*
1384 	 * Resuming is true while suspended, but when we're reprogramming the
1385 	 * hardware -- at that time it's allowed to use ieee80211_queue_work()
1386 	 * again even though some other parts of the stack are still suspended
1387 	 * and we still drop received frames to avoid waking the stack.
1388 	 */
1389 	bool resuming;
1390 
1391 	/*
1392 	 * quiescing is true during the suspend process _only_ to
1393 	 * ease timer cancelling etc.
1394 	 */
1395 	bool quiescing;
1396 
1397 	/* device is started */
1398 	bool started;
1399 
1400 	/* device is during a HW reconfig */
1401 	bool in_reconfig;
1402 
1403 	/* reconfiguration failed ... suppress some warnings etc. */
1404 	bool reconfig_failure;
1405 
1406 	/* wowlan is enabled -- don't reconfig on resume */
1407 	bool wowlan;
1408 
1409 	struct wiphy_work radar_detected_work;
1410 
1411 	/* number of RX chains the hardware has */
1412 	u8 rx_chains;
1413 
1414 	/* bitmap of which sbands were copied */
1415 	u8 sband_allocated;
1416 
1417 	int tx_headroom; /* required headroom for hardware/radiotap */
1418 
1419 	/* Tasklet and skb queue to process calls from IRQ mode. All frames
1420 	 * added to skb_queue will be processed, but frames in
1421 	 * skb_queue_unreliable may be dropped if the total length of these
1422 	 * queues increases over the limit. */
1423 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
1424 	struct tasklet_struct tasklet;
1425 	struct sk_buff_head skb_queue;
1426 	struct sk_buff_head skb_queue_unreliable;
1427 
1428 	spinlock_t rx_path_lock;
1429 
1430 	/* Station data */
1431 	/*
1432 	 * The mutex only protects the list, hash table and
1433 	 * counter, reads are done with RCU.
1434 	 */
1435 	struct mutex sta_mtx;
1436 	spinlock_t tim_lock;
1437 	unsigned long num_sta;
1438 	struct list_head sta_list;
1439 	struct rhltable sta_hash;
1440 	struct rhltable link_sta_hash;
1441 	struct timer_list sta_cleanup;
1442 	int sta_generation;
1443 
1444 	struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
1445 	struct tasklet_struct tx_pending_tasklet;
1446 	struct tasklet_struct wake_txqs_tasklet;
1447 
1448 	atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
1449 
1450 	/* number of interfaces with allmulti RX */
1451 	atomic_t iff_allmultis;
1452 
1453 	struct rate_control_ref *rate_ctrl;
1454 
1455 	struct arc4_ctx wep_tx_ctx;
1456 	struct arc4_ctx wep_rx_ctx;
1457 	u32 wep_iv;
1458 
1459 	/* see iface.c */
1460 	struct list_head interfaces;
1461 	struct list_head mon_list; /* only that are IFF_UP && !cooked */
1462 	struct mutex iflist_mtx;
1463 
1464 	/*
1465 	 * Key mutex, protects sdata's key_list and sta_info's
1466 	 * key pointers and ptk_idx (write access, they're RCU.)
1467 	 */
1468 	struct mutex key_mtx;
1469 
1470 	/* mutex for scan and work locking */
1471 	struct mutex mtx;
1472 
1473 	/* Scanning and BSS list */
1474 	unsigned long scanning;
1475 	struct cfg80211_ssid scan_ssid;
1476 	struct cfg80211_scan_request *int_scan_req;
1477 	struct cfg80211_scan_request __rcu *scan_req;
1478 	struct ieee80211_scan_request *hw_scan_req;
1479 	struct cfg80211_chan_def scan_chandef;
1480 	enum nl80211_band hw_scan_band;
1481 	int scan_channel_idx;
1482 	int scan_ies_len;
1483 	int hw_scan_ies_bufsize;
1484 	struct cfg80211_scan_info scan_info;
1485 
1486 	struct wiphy_work sched_scan_stopped_work;
1487 	struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
1488 	struct cfg80211_sched_scan_request __rcu *sched_scan_req;
1489 	u8 scan_addr[ETH_ALEN];
1490 
1491 	unsigned long leave_oper_channel_time;
1492 	enum mac80211_scan_state next_scan_state;
1493 	struct wiphy_delayed_work scan_work;
1494 	struct ieee80211_sub_if_data __rcu *scan_sdata;
1495 	/* For backward compatibility only -- do not use */
1496 	struct cfg80211_chan_def _oper_chandef;
1497 
1498 	/* Temporary remain-on-channel for off-channel operations */
1499 	struct ieee80211_channel *tmp_channel;
1500 
1501 	/* channel contexts */
1502 	struct list_head chanctx_list;
1503 	struct mutex chanctx_mtx;
1504 
1505 #ifdef CONFIG_MAC80211_LEDS
1506 	struct led_trigger tx_led, rx_led, assoc_led, radio_led;
1507 	struct led_trigger tpt_led;
1508 	atomic_t tx_led_active, rx_led_active, assoc_led_active;
1509 	atomic_t radio_led_active, tpt_led_active;
1510 	struct tpt_led_trigger *tpt_led_trigger;
1511 #endif
1512 
1513 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
1514 	/* SNMP counters */
1515 	/* dot11CountersTable */
1516 	u32 dot11TransmittedFragmentCount;
1517 	u32 dot11MulticastTransmittedFrameCount;
1518 	u32 dot11FailedCount;
1519 	u32 dot11RetryCount;
1520 	u32 dot11MultipleRetryCount;
1521 	u32 dot11FrameDuplicateCount;
1522 	u32 dot11ReceivedFragmentCount;
1523 	u32 dot11MulticastReceivedFrameCount;
1524 	u32 dot11TransmittedFrameCount;
1525 
1526 	/* TX/RX handler statistics */
1527 	unsigned int tx_handlers_drop;
1528 	unsigned int tx_handlers_queued;
1529 	unsigned int tx_handlers_drop_wep;
1530 	unsigned int tx_handlers_drop_not_assoc;
1531 	unsigned int tx_handlers_drop_unauth_port;
1532 	unsigned int rx_handlers_drop;
1533 	unsigned int rx_handlers_queued;
1534 	unsigned int rx_handlers_drop_nullfunc;
1535 	unsigned int rx_handlers_drop_defrag;
1536 	unsigned int tx_expand_skb_head;
1537 	unsigned int tx_expand_skb_head_cloned;
1538 	unsigned int rx_expand_skb_head_defrag;
1539 	unsigned int rx_handlers_fragments;
1540 	unsigned int tx_status_drop;
1541 #define I802_DEBUG_INC(c) (c)++
1542 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
1543 #define I802_DEBUG_INC(c) do { } while (0)
1544 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
1545 
1546 
1547 	int total_ps_buffered; /* total number of all buffered unicast and
1548 				* multicast packets for power saving stations
1549 				*/
1550 
1551 	bool pspolling;
1552 	/*
1553 	 * PS can only be enabled when we have exactly one managed
1554 	 * interface (and monitors) in PS, this then points there.
1555 	 */
1556 	struct ieee80211_sub_if_data *ps_sdata;
1557 	struct work_struct dynamic_ps_enable_work;
1558 	struct work_struct dynamic_ps_disable_work;
1559 	struct timer_list dynamic_ps_timer;
1560 	struct notifier_block ifa_notifier;
1561 	struct notifier_block ifa6_notifier;
1562 
1563 	/*
1564 	 * The dynamic ps timeout configured from user space via WEXT -
1565 	 * this will override whatever chosen by mac80211 internally.
1566 	 */
1567 	int dynamic_ps_forced_timeout;
1568 
1569 	int user_power_level; /* in dBm, for all interfaces */
1570 
1571 	enum ieee80211_smps_mode smps_mode;
1572 
1573 	struct work_struct restart_work;
1574 
1575 #ifdef CONFIG_MAC80211_DEBUGFS
1576 	struct local_debugfsdentries {
1577 		struct dentry *rcdir;
1578 		struct dentry *keys;
1579 	} debugfs;
1580 	bool force_tx_status;
1581 #endif
1582 
1583 	/*
1584 	 * Remain-on-channel support
1585 	 */
1586 	struct wiphy_delayed_work roc_work;
1587 	struct list_head roc_list;
1588 	struct wiphy_work hw_roc_start, hw_roc_done;
1589 	unsigned long hw_roc_start_time;
1590 	u64 roc_cookie_counter;
1591 
1592 	struct idr ack_status_frames;
1593 	spinlock_t ack_status_lock;
1594 
1595 	struct ieee80211_sub_if_data __rcu *p2p_sdata;
1596 
1597 	/* virtual monitor interface */
1598 	struct ieee80211_sub_if_data __rcu *monitor_sdata;
1599 	struct cfg80211_chan_def monitor_chandef;
1600 
1601 	/* extended capabilities provided by mac80211 */
1602 	u8 ext_capa[8];
1603 };
1604 
1605 static inline struct ieee80211_sub_if_data *
IEEE80211_DEV_TO_SUB_IF(const struct net_device * dev)1606 IEEE80211_DEV_TO_SUB_IF(const struct net_device *dev)
1607 {
1608 	return netdev_priv(dev);
1609 }
1610 
1611 static inline struct ieee80211_sub_if_data *
IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev * wdev)1612 IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev *wdev)
1613 {
1614 	return container_of(wdev, struct ieee80211_sub_if_data, wdev);
1615 }
1616 
1617 static inline struct ieee80211_supported_band *
ieee80211_get_sband(struct ieee80211_sub_if_data * sdata)1618 ieee80211_get_sband(struct ieee80211_sub_if_data *sdata)
1619 {
1620 	struct ieee80211_local *local = sdata->local;
1621 	struct ieee80211_chanctx_conf *chanctx_conf;
1622 	enum nl80211_band band;
1623 
1624 	WARN_ON(ieee80211_vif_is_mld(&sdata->vif));
1625 
1626 	rcu_read_lock();
1627 	chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
1628 
1629 	if (!chanctx_conf) {
1630 		rcu_read_unlock();
1631 		return NULL;
1632 	}
1633 
1634 	band = chanctx_conf->def.chan->band;
1635 	rcu_read_unlock();
1636 
1637 	return local->hw.wiphy->bands[band];
1638 }
1639 
1640 static inline struct ieee80211_supported_band *
ieee80211_get_link_sband(struct ieee80211_link_data * link)1641 ieee80211_get_link_sband(struct ieee80211_link_data *link)
1642 {
1643 	struct ieee80211_local *local = link->sdata->local;
1644 	struct ieee80211_chanctx_conf *chanctx_conf;
1645 	enum nl80211_band band;
1646 
1647 	rcu_read_lock();
1648 	chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
1649 	if (!chanctx_conf) {
1650 		rcu_read_unlock();
1651 		return NULL;
1652 	}
1653 
1654 	band = chanctx_conf->def.chan->band;
1655 	rcu_read_unlock();
1656 
1657 	return local->hw.wiphy->bands[band];
1658 }
1659 
1660 /* this struct holds the value parsing from channel switch IE  */
1661 struct ieee80211_csa_ie {
1662 	struct cfg80211_chan_def chandef;
1663 	u8 mode;
1664 	u8 count;
1665 	u8 ttl;
1666 	u16 pre_value;
1667 	u16 reason_code;
1668 	u32 max_switch_time;
1669 };
1670 
1671 /* Parsed Information Elements */
1672 struct ieee802_11_elems {
1673 	const u8 *ie_start;
1674 	size_t total_len;
1675 	u32 crc;
1676 
1677 	/* pointers to IEs */
1678 	const struct ieee80211_tdls_lnkie *lnk_id;
1679 	const struct ieee80211_ch_switch_timing *ch_sw_timing;
1680 	const u8 *ext_capab;
1681 	const u8 *ssid;
1682 	const u8 *supp_rates;
1683 	const u8 *ds_params;
1684 	const struct ieee80211_tim_ie *tim;
1685 	const u8 *rsn;
1686 	const u8 *rsnx;
1687 	const u8 *erp_info;
1688 	const u8 *ext_supp_rates;
1689 	const u8 *wmm_info;
1690 	const u8 *wmm_param;
1691 	const struct ieee80211_ht_cap *ht_cap_elem;
1692 	const struct ieee80211_ht_operation *ht_operation;
1693 	const struct ieee80211_vht_cap *vht_cap_elem;
1694 	const struct ieee80211_vht_operation *vht_operation;
1695 	const struct ieee80211_meshconf_ie *mesh_config;
1696 	const u8 *he_cap;
1697 	const struct ieee80211_he_operation *he_operation;
1698 	const struct ieee80211_he_spr *he_spr;
1699 	const struct ieee80211_mu_edca_param_set *mu_edca_param_set;
1700 	const struct ieee80211_he_6ghz_capa *he_6ghz_capa;
1701 	const struct ieee80211_tx_pwr_env *tx_pwr_env[IEEE80211_TPE_MAX_IE_COUNT];
1702 	const u8 *uora_element;
1703 	const u8 *mesh_id;
1704 	const u8 *peering;
1705 	const __le16 *awake_window;
1706 	const u8 *preq;
1707 	const u8 *prep;
1708 	const u8 *perr;
1709 	const struct ieee80211_rann_ie *rann;
1710 	const struct ieee80211_channel_sw_ie *ch_switch_ie;
1711 	const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
1712 	const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1713 	const u8 *max_channel_switch_time;
1714 	const u8 *country_elem;
1715 	const u8 *pwr_constr_elem;
1716 	const u8 *cisco_dtpc_elem;
1717 	const struct ieee80211_timeout_interval_ie *timeout_int;
1718 	const u8 *opmode_notif;
1719 	const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1720 	struct ieee80211_mesh_chansw_params_ie *mesh_chansw_params_ie;
1721 	const struct ieee80211_bss_max_idle_period_ie *max_idle_period_ie;
1722 	const struct ieee80211_multiple_bssid_configuration *mbssid_config_ie;
1723 	const struct ieee80211_bssid_index *bssid_index;
1724 	u8 max_bssid_indicator;
1725 	u8 dtim_count;
1726 	u8 dtim_period;
1727 	const struct ieee80211_addba_ext_ie *addba_ext_ie;
1728 	const struct ieee80211_s1g_cap *s1g_capab;
1729 	const struct ieee80211_s1g_oper_ie *s1g_oper;
1730 	const struct ieee80211_s1g_bcn_compat_ie *s1g_bcn_compat;
1731 	const struct ieee80211_aid_response_ie *aid_resp;
1732 	const struct ieee80211_eht_cap_elem *eht_cap;
1733 	const struct ieee80211_eht_operation *eht_operation;
1734 	const struct ieee80211_multi_link_elem *ml_basic;
1735 	const struct ieee80211_multi_link_elem *ml_reconf;
1736 
1737 	/* length of them, respectively */
1738 	u8 ext_capab_len;
1739 	u8 ssid_len;
1740 	u8 supp_rates_len;
1741 	u8 tim_len;
1742 	u8 rsn_len;
1743 	u8 rsnx_len;
1744 	u8 ext_supp_rates_len;
1745 	u8 wmm_info_len;
1746 	u8 wmm_param_len;
1747 	u8 he_cap_len;
1748 	u8 mesh_id_len;
1749 	u8 peering_len;
1750 	u8 preq_len;
1751 	u8 prep_len;
1752 	u8 perr_len;
1753 	u8 country_elem_len;
1754 	u8 bssid_index_len;
1755 	u8 tx_pwr_env_len[IEEE80211_TPE_MAX_IE_COUNT];
1756 	u8 tx_pwr_env_num;
1757 	u8 eht_cap_len;
1758 
1759 	/* mult-link element can be de-fragmented and thus u8 is not sufficient */
1760 	size_t ml_basic_len;
1761 	size_t ml_reconf_len;
1762 
1763 	/* The basic Multi-Link element in the original IEs */
1764 	const struct element *ml_basic_elem;
1765 
1766 	/* The reconfiguration Multi-Link element in the original IEs */
1767 	const struct element *ml_reconf_elem;
1768 
1769 	/*
1770 	 * store the per station profile pointer and length in case that the
1771 	 * parsing also handled Multi-Link element parsing for a specific link
1772 	 * ID.
1773 	 */
1774 	struct ieee80211_mle_per_sta_profile *prof;
1775 	size_t sta_prof_len;
1776 
1777 	/* whether a parse error occurred while retrieving these elements */
1778 	bool parse_error;
1779 
1780 	/*
1781 	 * scratch buffer that can be used for various element parsing related
1782 	 * tasks, e.g., element de-fragmentation etc.
1783 	 */
1784 	size_t scratch_len;
1785 	u8 *scratch_pos;
1786 	u8 scratch[];
1787 };
1788 
hw_to_local(struct ieee80211_hw * hw)1789 static inline struct ieee80211_local *hw_to_local(
1790 	struct ieee80211_hw *hw)
1791 {
1792 	return container_of(hw, struct ieee80211_local, hw);
1793 }
1794 
to_txq_info(struct ieee80211_txq * txq)1795 static inline struct txq_info *to_txq_info(struct ieee80211_txq *txq)
1796 {
1797 	return container_of(txq, struct txq_info, txq);
1798 }
1799 
txq_has_queue(struct ieee80211_txq * txq)1800 static inline bool txq_has_queue(struct ieee80211_txq *txq)
1801 {
1802 	struct txq_info *txqi = to_txq_info(txq);
1803 
1804 	return !(skb_queue_empty(&txqi->frags) && !txqi->tin.backlog_packets);
1805 }
1806 
1807 static inline bool
ieee80211_have_rx_timestamp(struct ieee80211_rx_status * status)1808 ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
1809 {
1810 	WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
1811 		     status->flag & RX_FLAG_MACTIME_END);
1812 	return !!(status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END |
1813 				  RX_FLAG_MACTIME_PLCP_START));
1814 }
1815 
1816 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata);
1817 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata);
1818 
1819 /* This function returns the number of multicast stations connected to this
1820  * interface. It returns -1 if that number is not tracked, that is for netdevs
1821  * not in AP or AP_VLAN mode or when using 4addr.
1822  */
1823 static inline int
ieee80211_vif_get_num_mcast_if(struct ieee80211_sub_if_data * sdata)1824 ieee80211_vif_get_num_mcast_if(struct ieee80211_sub_if_data *sdata)
1825 {
1826 	if (sdata->vif.type == NL80211_IFTYPE_AP)
1827 		return atomic_read(&sdata->u.ap.num_mcast_sta);
1828 	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
1829 		return atomic_read(&sdata->u.vlan.num_mcast_sta);
1830 	return -1;
1831 }
1832 
1833 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
1834 				     struct ieee80211_rx_status *status,
1835 				     unsigned int mpdu_len,
1836 				     unsigned int mpdu_offset);
1837 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1838 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1839 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1840 				      u64 changed);
1841 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
1842 				     u64 changed);
1843 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
1844 				       struct ieee80211_link_data *link,
1845 				       u64 changed);
1846 void ieee80211_configure_filter(struct ieee80211_local *local);
1847 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1848 
1849 u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local);
1850 int ieee80211_attach_ack_skb(struct ieee80211_local *local, struct sk_buff *skb,
1851 			     u64 *cookie, gfp_t gfp);
1852 
1853 void ieee80211_check_fast_rx(struct sta_info *sta);
1854 void __ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata);
1855 void ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata);
1856 void ieee80211_clear_fast_rx(struct sta_info *sta);
1857 
1858 bool ieee80211_is_our_addr(struct ieee80211_sub_if_data *sdata,
1859 			   const u8 *addr, int *out_link_id);
1860 
1861 /* STA code */
1862 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1863 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1864 		       struct cfg80211_auth_request *req);
1865 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1866 			struct cfg80211_assoc_request *req);
1867 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1868 			 struct cfg80211_deauth_request *req);
1869 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1870 			   struct cfg80211_disassoc_request *req);
1871 void ieee80211_send_pspoll(struct ieee80211_local *local,
1872 			   struct ieee80211_sub_if_data *sdata);
1873 void ieee80211_recalc_ps(struct ieee80211_local *local);
1874 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata);
1875 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1876 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1877 				  struct sk_buff *skb);
1878 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata,
1879 				 struct sk_buff *skb);
1880 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1881 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1882 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
1883 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
1884 				  __le16 fc, bool acked);
1885 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata);
1886 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1887 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata);
1888 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
1889 				   u8 reason, bool tx);
1890 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link);
1891 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link);
1892 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link);
1893 
1894 /* IBSS code */
1895 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1896 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1897 void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1898 			      const u8 *bssid, const u8 *addr, u32 supp_rates);
1899 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1900 			struct cfg80211_ibss_params *params);
1901 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1902 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1903 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1904 				   struct sk_buff *skb);
1905 int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
1906 			      struct cfg80211_csa_settings *csa_settings,
1907 			      u64 *changed);
1908 int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata,
1909 			      u64 *changed);
1910 void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata);
1911 
1912 /* OCB code */
1913 void ieee80211_ocb_work(struct ieee80211_sub_if_data *sdata);
1914 void ieee80211_ocb_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1915 			     const u8 *bssid, const u8 *addr, u32 supp_rates);
1916 void ieee80211_ocb_setup_sdata(struct ieee80211_sub_if_data *sdata);
1917 int ieee80211_ocb_join(struct ieee80211_sub_if_data *sdata,
1918 		       struct ocb_setup *setup);
1919 int ieee80211_ocb_leave(struct ieee80211_sub_if_data *sdata);
1920 
1921 /* mesh code */
1922 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1923 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1924 				   struct sk_buff *skb);
1925 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1926 			      struct cfg80211_csa_settings *csa_settings,
1927 			      u64 *changed);
1928 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata,
1929 			      u64 *changed);
1930 
1931 /* scan/BSS handling */
1932 void ieee80211_scan_work(struct wiphy *wiphy, struct wiphy_work *work);
1933 int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
1934 				const u8 *ssid, u8 ssid_len,
1935 				struct ieee80211_channel **channels,
1936 				unsigned int n_channels,
1937 				enum nl80211_bss_scan_width scan_width);
1938 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1939 			   struct cfg80211_scan_request *req);
1940 void ieee80211_scan_cancel(struct ieee80211_local *local);
1941 void ieee80211_run_deferred_scan(struct ieee80211_local *local);
1942 void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb);
1943 
1944 void ieee80211_inform_bss(struct wiphy *wiphy, struct cfg80211_bss *bss,
1945 			  const struct cfg80211_bss_ies *ies, void *data);
1946 
1947 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1948 struct ieee80211_bss *
1949 ieee80211_bss_info_update(struct ieee80211_local *local,
1950 			  struct ieee80211_rx_status *rx_status,
1951 			  struct ieee80211_mgmt *mgmt,
1952 			  size_t len,
1953 			  struct ieee80211_channel *channel);
1954 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1955 			  struct ieee80211_bss *bss);
1956 
1957 /* scheduled scan handling */
1958 int
1959 __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1960 				     struct cfg80211_sched_scan_request *req);
1961 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1962 				       struct cfg80211_sched_scan_request *req);
1963 int ieee80211_request_sched_scan_stop(struct ieee80211_local *local);
1964 void ieee80211_sched_scan_end(struct ieee80211_local *local);
1965 void ieee80211_sched_scan_stopped_work(struct wiphy *wiphy,
1966 				       struct wiphy_work *work);
1967 
1968 /* off-channel/mgmt-tx */
1969 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
1970 void ieee80211_offchannel_return(struct ieee80211_local *local);
1971 void ieee80211_roc_setup(struct ieee80211_local *local);
1972 void ieee80211_start_next_roc(struct ieee80211_local *local);
1973 void ieee80211_roc_purge(struct ieee80211_local *local,
1974 			 struct ieee80211_sub_if_data *sdata);
1975 int ieee80211_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
1976 				struct ieee80211_channel *chan,
1977 				unsigned int duration, u64 *cookie);
1978 int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
1979 				       struct wireless_dev *wdev, u64 cookie);
1980 int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
1981 		      struct cfg80211_mgmt_tx_params *params, u64 *cookie);
1982 int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
1983 				  struct wireless_dev *wdev, u64 cookie);
1984 
1985 /* channel switch handling */
1986 void ieee80211_csa_finalize_work(struct work_struct *work);
1987 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
1988 			     struct cfg80211_csa_settings *params);
1989 
1990 /* color change handling */
1991 void ieee80211_color_change_finalize_work(struct work_struct *work);
1992 void ieee80211_color_collision_detection_work(struct work_struct *work);
1993 
1994 /* interface handling */
1995 #define MAC80211_SUPPORTED_FEATURES_TX	(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | \
1996 					 NETIF_F_HW_CSUM | NETIF_F_SG | \
1997 					 NETIF_F_HIGHDMA | NETIF_F_GSO_SOFTWARE | \
1998 					 NETIF_F_HW_TC)
1999 #define MAC80211_SUPPORTED_FEATURES_RX	(NETIF_F_RXCSUM)
2000 #define MAC80211_SUPPORTED_FEATURES	(MAC80211_SUPPORTED_FEATURES_TX | \
2001 					 MAC80211_SUPPORTED_FEATURES_RX)
2002 
2003 int ieee80211_iface_init(void);
2004 void ieee80211_iface_exit(void);
2005 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
2006 		     unsigned char name_assign_type,
2007 		     struct wireless_dev **new_wdev, enum nl80211_iftype type,
2008 		     struct vif_params *params);
2009 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
2010 			     enum nl80211_iftype type);
2011 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
2012 void ieee80211_remove_interfaces(struct ieee80211_local *local);
2013 u32 ieee80211_idle_off(struct ieee80211_local *local);
2014 void ieee80211_recalc_idle(struct ieee80211_local *local);
2015 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
2016 				    const int offset);
2017 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
2018 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
2019 int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
2020 void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
2021 
2022 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
2023 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
2024 			      bool update_bss);
2025 void ieee80211_recalc_offload(struct ieee80211_local *local);
2026 
ieee80211_sdata_running(struct ieee80211_sub_if_data * sdata)2027 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
2028 {
2029 	return test_bit(SDATA_STATE_RUNNING, &sdata->state);
2030 }
2031 
2032 /* link handling */
2033 void ieee80211_link_setup(struct ieee80211_link_data *link);
2034 void ieee80211_link_init(struct ieee80211_sub_if_data *sdata,
2035 			 int link_id,
2036 			 struct ieee80211_link_data *link,
2037 			 struct ieee80211_bss_conf *link_conf);
2038 void ieee80211_link_stop(struct ieee80211_link_data *link);
2039 int ieee80211_vif_set_links(struct ieee80211_sub_if_data *sdata,
2040 			    u16 new_links, u16 dormant_links);
2041 void ieee80211_vif_clear_links(struct ieee80211_sub_if_data *sdata);
2042 int __ieee80211_set_active_links(struct ieee80211_vif *vif, u16 active_links);
2043 
2044 /* tx handling */
2045 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
2046 void ieee80211_tx_pending(struct tasklet_struct *t);
2047 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2048 					 struct net_device *dev);
2049 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
2050 				       struct net_device *dev);
2051 netdev_tx_t ieee80211_subif_start_xmit_8023(struct sk_buff *skb,
2052 					    struct net_device *dev);
2053 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
2054 				  struct net_device *dev,
2055 				  u32 info_flags,
2056 				  u32 ctrl_flags,
2057 				  u64 *cookie);
2058 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
2059 			      struct sk_buff_head *skbs);
2060 struct sk_buff *
2061 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
2062 			      struct sk_buff *skb, u32 info_flags);
2063 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
2064 			  int retry_count, int shift, bool send_to_cooked,
2065 			  struct ieee80211_tx_status *status);
2066 
2067 void ieee80211_check_fast_xmit(struct sta_info *sta);
2068 void ieee80211_check_fast_xmit_all(struct ieee80211_local *local);
2069 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata);
2070 void ieee80211_clear_fast_xmit(struct sta_info *sta);
2071 int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
2072 			      const u8 *buf, size_t len,
2073 			      const u8 *dest, __be16 proto, bool unencrypted,
2074 			      int link_id, u64 *cookie);
2075 int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
2076 			      const u8 *buf, size_t len);
2077 void __ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
2078 			   struct sta_info *sta,
2079 			   struct ieee80211_fast_tx *fast_tx,
2080 			   struct sk_buff *skb, bool ampdu,
2081 			   const u8 *da, const u8 *sa);
2082 void ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
2083 			  struct sta_info *sta, struct sk_buff *skb);
2084 
2085 /* HT */
2086 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
2087 				     struct ieee80211_sta_ht_cap *ht_cap);
2088 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
2089 				       struct ieee80211_supported_band *sband,
2090 				       const struct ieee80211_ht_cap *ht_cap_ie,
2091 				       struct link_sta_info *link_sta);
2092 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
2093 			  const u8 *da, u16 tid,
2094 			  u16 initiator, u16 reason_code);
2095 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
2096 			       enum ieee80211_smps_mode smps, const u8 *da,
2097 			       const u8 *bssid);
2098 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2099 				   enum ieee80211_smps_mode smps_mode_new);
2100 
2101 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
2102 				     u16 initiator, u16 reason, bool stop);
2103 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
2104 				    u16 initiator, u16 reason, bool stop);
2105 void ___ieee80211_start_rx_ba_session(struct sta_info *sta,
2106 				      u8 dialog_token, u16 timeout,
2107 				      u16 start_seq_num, u16 ba_policy, u16 tid,
2108 				      u16 buf_size, bool tx, bool auto_seq,
2109 				      const struct ieee80211_addba_ext_ie *addbaext);
2110 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
2111 					 enum ieee80211_agg_stop_reason reason);
2112 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
2113 			     struct sta_info *sta,
2114 			     struct ieee80211_mgmt *mgmt, size_t len);
2115 void ieee80211_process_addba_resp(struct ieee80211_local *local,
2116 				  struct sta_info *sta,
2117 				  struct ieee80211_mgmt *mgmt,
2118 				  size_t len);
2119 void ieee80211_process_addba_request(struct ieee80211_local *local,
2120 				     struct sta_info *sta,
2121 				     struct ieee80211_mgmt *mgmt,
2122 				     size_t len);
2123 
2124 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
2125 				   enum ieee80211_agg_stop_reason reason);
2126 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
2127 				    enum ieee80211_agg_stop_reason reason);
2128 void ieee80211_start_tx_ba_cb(struct sta_info *sta, int tid,
2129 			      struct tid_ampdu_tx *tid_tx);
2130 void ieee80211_stop_tx_ba_cb(struct sta_info *sta, int tid,
2131 			     struct tid_ampdu_tx *tid_tx);
2132 void ieee80211_ba_session_work(struct work_struct *work);
2133 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
2134 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
2135 
2136 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);
2137 enum nl80211_smps_mode
2138 ieee80211_smps_mode_to_smps_mode(enum ieee80211_smps_mode smps);
2139 
2140 /* VHT */
2141 void
2142 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
2143 				    struct ieee80211_supported_band *sband,
2144 				    const struct ieee80211_vht_cap *vht_cap_ie,
2145 				    const struct ieee80211_vht_cap *vht_cap_ie2,
2146 				    struct link_sta_info *link_sta);
2147 enum ieee80211_sta_rx_bandwidth
2148 ieee80211_sta_cap_rx_bw(struct link_sta_info *link_sta);
2149 enum ieee80211_sta_rx_bandwidth
2150 ieee80211_sta_cur_vht_bw(struct link_sta_info *link_sta);
2151 void ieee80211_sta_set_rx_nss(struct link_sta_info *link_sta);
2152 enum ieee80211_sta_rx_bandwidth
2153 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width);
2154 enum nl80211_chan_width
2155 ieee80211_sta_cap_chan_bw(struct link_sta_info *link_sta);
2156 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
2157 				 struct ieee80211_link_data *link,
2158 				 struct ieee80211_mgmt *mgmt);
2159 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
2160 				  struct link_sta_info *sta,
2161 				  u8 opmode, enum nl80211_band band);
2162 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
2163 				 struct link_sta_info *sta,
2164 				 u8 opmode, enum nl80211_band band);
2165 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
2166 				      struct ieee80211_sta_vht_cap *vht_cap);
2167 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
2168 				     u16 vht_mask[NL80211_VHT_NSS_MAX]);
2169 enum nl80211_chan_width
2170 ieee80211_sta_rx_bw_to_chan_width(struct link_sta_info *sta);
2171 
2172 /* HE */
2173 void
2174 ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
2175 				  struct ieee80211_supported_band *sband,
2176 				  const u8 *he_cap_ie, u8 he_cap_len,
2177 				  const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
2178 				  struct link_sta_info *link_sta);
2179 void
2180 ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
2181 				const struct ieee80211_he_spr *he_spr_ie_elem);
2182 
2183 void
2184 ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif,
2185 			const struct ieee80211_he_operation *he_op_ie_elem);
2186 
2187 /* S1G */
2188 void ieee80211_s1g_sta_rate_init(struct sta_info *sta);
2189 bool ieee80211_s1g_is_twt_setup(struct sk_buff *skb);
2190 void ieee80211_s1g_rx_twt_action(struct ieee80211_sub_if_data *sdata,
2191 				 struct sk_buff *skb);
2192 void ieee80211_s1g_status_twt_action(struct ieee80211_sub_if_data *sdata,
2193 				     struct sk_buff *skb);
2194 
2195 /* Spectrum management */
2196 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
2197 				       struct ieee80211_mgmt *mgmt,
2198 				       size_t len);
2199 /**
2200  * ieee80211_parse_ch_switch_ie - parses channel switch IEs
2201  * @sdata: the sdata of the interface which has received the frame
2202  * @elems: parsed 802.11 elements received with the frame
2203  * @current_band: indicates the current band
2204  * @vht_cap_info: VHT capabilities of the transmitter
2205  * @conn_flags: contains information about own capabilities and restrictions
2206  *	to decide which channel switch announcements can be accepted, using
2207  *	flags from &enum ieee80211_conn_flags.
2208  * @bssid: the currently connected bssid (for reporting)
2209  * @csa_ie: parsed 802.11 csa elements on count, mode, chandef and mesh ttl.
2210 	All of them will be filled with if success only.
2211  * Return: 0 on success, <0 on error and >0 if there is nothing to parse.
2212  */
2213 int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
2214 				 struct ieee802_11_elems *elems,
2215 				 enum nl80211_band current_band,
2216 				 u32 vht_cap_info,
2217 				 ieee80211_conn_flags_t conn_flags, u8 *bssid,
2218 				 struct ieee80211_csa_ie *csa_ie);
2219 
2220 /* Suspend/resume and hw reconfiguration */
2221 int ieee80211_reconfig(struct ieee80211_local *local);
2222 void ieee80211_stop_device(struct ieee80211_local *local);
2223 
2224 int __ieee80211_suspend(struct ieee80211_hw *hw,
2225 			struct cfg80211_wowlan *wowlan);
2226 
__ieee80211_resume(struct ieee80211_hw * hw)2227 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
2228 {
2229 	struct ieee80211_local *local = hw_to_local(hw);
2230 
2231 	WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) &&
2232 	     !test_bit(SCAN_COMPLETED, &local->scanning),
2233 		"%s: resume with hardware scan still in progress\n",
2234 		wiphy_name(hw->wiphy));
2235 
2236 	return ieee80211_reconfig(hw_to_local(hw));
2237 }
2238 
2239 /* utility functions/constants */
2240 extern const void *const mac80211_wiphy_privid; /* for wiphy privid */
2241 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
2242 			     int rate, int erp, int short_preamble,
2243 			     int shift);
2244 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
2245 					   struct ieee80211_tx_queue_params *qparam,
2246 					   int ac);
2247 void ieee80211_set_wmm_default(struct ieee80211_link_data *link,
2248 			       bool bss_notify, bool enable_qos);
2249 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
2250 		    struct sta_info *sta, struct sk_buff *skb);
2251 
2252 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
2253 				 struct sk_buff *skb, int tid, int link_id,
2254 				 enum nl80211_band band);
2255 
2256 /* sta_out needs to be checked for ERR_PTR() before using */
2257 int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2258 			    struct sk_buff *skb,
2259 			    struct sta_info **sta_out);
2260 
2261 static inline void
ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,int tid,enum nl80211_band band)2262 ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
2263 			  struct sk_buff *skb, int tid,
2264 			  enum nl80211_band band)
2265 {
2266 	rcu_read_lock();
2267 	__ieee80211_tx_skb_tid_band(sdata, skb, tid, -1, band);
2268 	rcu_read_unlock();
2269 }
2270 
2271 void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
2272 			  struct sk_buff *skb, int tid, int link_id);
2273 
ieee80211_tx_skb(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)2274 static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
2275 				    struct sk_buff *skb)
2276 {
2277 	/* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
2278 	ieee80211_tx_skb_tid(sdata, skb, 7, -1);
2279 }
2280 
2281 /**
2282  * struct ieee80211_elems_parse_params - element parsing parameters
2283  * @start: pointer to the elements
2284  * @len: length of the elements
2285  * @action: %true if the elements came from an action frame
2286  * @filter: bitmap of element IDs to filter out while calculating
2287  *	the element CRC
2288  * @crc: CRC starting value
2289  * @bss: the BSS to parse this as, for multi-BSSID cases this can
2290  *	represent a non-transmitting BSS in which case the data
2291  *	for that non-transmitting BSS is returned
2292  * @link_id: the link ID to parse elements for, if a STA profile
2293  *	is present in the multi-link element, or -1 to ignore;
2294  *	note that the code currently assumes parsing an association
2295  *	(or re-association) response frame if this is given
2296  * @from_ap: frame is received from an AP (currently used only
2297  *	for EHT capabilities parsing)
2298  */
2299 struct ieee80211_elems_parse_params {
2300 	const u8 *start;
2301 	size_t len;
2302 	bool action;
2303 	u64 filter;
2304 	u32 crc;
2305 	struct cfg80211_bss *bss;
2306 	int link_id;
2307 	bool from_ap;
2308 };
2309 
2310 struct ieee802_11_elems *
2311 ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params);
2312 
2313 static inline struct ieee802_11_elems *
ieee802_11_parse_elems_crc(const u8 * start,size_t len,bool action,u64 filter,u32 crc,struct cfg80211_bss * bss)2314 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
2315 			   u64 filter, u32 crc,
2316 			   struct cfg80211_bss *bss)
2317 {
2318 	struct ieee80211_elems_parse_params params = {
2319 		.start = start,
2320 		.len = len,
2321 		.action = action,
2322 		.filter = filter,
2323 		.crc = crc,
2324 		.bss = bss,
2325 		.link_id = -1,
2326 	};
2327 
2328 	return ieee802_11_parse_elems_full(&params);
2329 }
2330 
2331 static inline struct ieee802_11_elems *
ieee802_11_parse_elems(const u8 * start,size_t len,bool action,struct cfg80211_bss * bss)2332 ieee802_11_parse_elems(const u8 *start, size_t len, bool action,
2333 		       struct cfg80211_bss *bss)
2334 {
2335 	return ieee802_11_parse_elems_crc(start, len, action, 0, 0, bss);
2336 }
2337 
2338 void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos, u8 frag_id);
2339 
2340 extern const int ieee802_1d_to_ac[8];
2341 
ieee80211_ac_from_tid(int tid)2342 static inline int ieee80211_ac_from_tid(int tid)
2343 {
2344 	return ieee802_1d_to_ac[tid & 7];
2345 }
2346 
2347 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
2348 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
2349 void ieee80211_dynamic_ps_timer(struct timer_list *t);
2350 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2351 			     struct ieee80211_sub_if_data *sdata,
2352 			     bool powersave);
2353 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
2354 				   struct ieee80211_sub_if_data *sdata);
2355 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2356 			     struct ieee80211_hdr *hdr, bool ack, u16 tx_time);
2357 
2358 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
2359 				     unsigned long queues,
2360 				     enum queue_stop_reason reason,
2361 				     bool refcounted);
2362 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
2363 			       struct ieee80211_sub_if_data *sdata,
2364 			       enum queue_stop_reason reason);
2365 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
2366 			       struct ieee80211_sub_if_data *sdata,
2367 			       enum queue_stop_reason reason);
2368 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
2369 				     unsigned long queues,
2370 				     enum queue_stop_reason reason,
2371 				     bool refcounted);
2372 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
2373 				    enum queue_stop_reason reason,
2374 				    bool refcounted);
2375 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
2376 				    enum queue_stop_reason reason,
2377 				    bool refcounted);
2378 void ieee80211_add_pending_skb(struct ieee80211_local *local,
2379 			       struct sk_buff *skb);
2380 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
2381 				struct sk_buff_head *skbs);
2382 void ieee80211_flush_queues(struct ieee80211_local *local,
2383 			    struct ieee80211_sub_if_data *sdata, bool drop);
2384 void __ieee80211_flush_queues(struct ieee80211_local *local,
2385 			      struct ieee80211_sub_if_data *sdata,
2386 			      unsigned int queues, bool drop);
2387 
ieee80211_can_run_worker(struct ieee80211_local * local)2388 static inline bool ieee80211_can_run_worker(struct ieee80211_local *local)
2389 {
2390 	/*
2391 	 * It's unsafe to try to do any work during reconfigure flow.
2392 	 * When the flow ends the work will be requeued.
2393 	 */
2394 	if (local->in_reconfig)
2395 		return false;
2396 
2397 	/*
2398 	 * If quiescing is set, we are racing with __ieee80211_suspend.
2399 	 * __ieee80211_suspend flushes the workers after setting quiescing,
2400 	 * and we check quiescing / suspended before enqueing new workers.
2401 	 * We should abort the worker to avoid the races below.
2402 	 */
2403 	if (local->quiescing)
2404 		return false;
2405 
2406 	/*
2407 	 * We might already be suspended if the following scenario occurs:
2408 	 * __ieee80211_suspend		Control path
2409 	 *
2410 	 *				if (local->quiescing)
2411 	 *					return;
2412 	 * local->quiescing = true;
2413 	 * flush_workqueue();
2414 	 *				queue_work(...);
2415 	 * local->suspended = true;
2416 	 * local->quiescing = false;
2417 	 *				worker starts running...
2418 	 */
2419 	if (local->suspended)
2420 		return false;
2421 
2422 	return true;
2423 }
2424 
2425 int ieee80211_txq_setup_flows(struct ieee80211_local *local);
2426 void ieee80211_txq_set_params(struct ieee80211_local *local);
2427 void ieee80211_txq_teardown_flows(struct ieee80211_local *local);
2428 void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
2429 			struct sta_info *sta,
2430 			struct txq_info *txq, int tid);
2431 void ieee80211_txq_purge(struct ieee80211_local *local,
2432 			 struct txq_info *txqi);
2433 void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
2434 			       struct ieee80211_sub_if_data *sdata);
2435 void ieee80211_fill_txq_stats(struct cfg80211_txq_stats *txqstats,
2436 			      struct txq_info *txqi);
2437 void ieee80211_wake_txqs(struct tasklet_struct *t);
2438 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
2439 			 u16 transaction, u16 auth_alg, u16 status,
2440 			 const u8 *extra, size_t extra_len, const u8 *bssid,
2441 			 const u8 *da, const u8 *key, u8 key_len, u8 key_idx,
2442 			 u32 tx_flags);
2443 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
2444 				    const u8 *da, const u8 *bssid,
2445 				    u16 stype, u16 reason,
2446 				    bool send_frame, u8 *frame_buf);
2447 u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end);
2448 
2449 enum {
2450 	IEEE80211_PROBE_FLAG_DIRECTED		= BIT(0),
2451 	IEEE80211_PROBE_FLAG_MIN_CONTENT	= BIT(1),
2452 	IEEE80211_PROBE_FLAG_RANDOM_SN		= BIT(2),
2453 };
2454 
2455 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
2456 			     size_t buffer_len,
2457 			     struct ieee80211_scan_ies *ie_desc,
2458 			     const u8 *ie, size_t ie_len,
2459 			     u8 bands_used, u32 *rate_masks,
2460 			     struct cfg80211_chan_def *chandef,
2461 			     u32 flags);
2462 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2463 					  const u8 *src, const u8 *dst,
2464 					  u32 ratemask,
2465 					  struct ieee80211_channel *chan,
2466 					  const u8 *ssid, size_t ssid_len,
2467 					  const u8 *ie, size_t ie_len,
2468 					  u32 flags);
2469 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2470 			    struct ieee802_11_elems *elems,
2471 			    enum nl80211_band band, u32 *basic_rates);
2472 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
2473 				 struct ieee80211_link_data *link,
2474 				 enum ieee80211_smps_mode smps_mode);
2475 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata,
2476 			   struct ieee80211_link_data *link);
2477 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata,
2478 				  int link_id);
2479 
2480 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
2481 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2482 			      u16 cap);
2483 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2484 			       const struct cfg80211_chan_def *chandef,
2485 			       u16 prot_mode, bool rifs_mode);
2486 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2487 				   const struct cfg80211_chan_def *chandef);
2488 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2489 			       u32 cap);
2490 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2491 				const struct cfg80211_chan_def *chandef);
2492 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype);
2493 u8 *ieee80211_ie_build_he_cap(ieee80211_conn_flags_t disable_flags, u8 *pos,
2494 			      const struct ieee80211_sta_he_cap *he_cap,
2495 			      u8 *end);
2496 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2497 				    enum ieee80211_smps_mode smps_mode,
2498 				    struct sk_buff *skb);
2499 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef);
2500 u8 *ieee80211_ie_build_eht_oper(u8 *pos, struct cfg80211_chan_def *chandef,
2501 				const struct ieee80211_sta_eht_cap *eht_cap);
2502 int ieee80211_parse_bitrates(enum nl80211_chan_width width,
2503 			     const struct ieee80211_supported_band *sband,
2504 			     const u8 *srates, int srates_len, u32 *rates);
2505 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2506 			    struct sk_buff *skb, bool need_basic,
2507 			    enum nl80211_band band);
2508 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2509 				struct sk_buff *skb, bool need_basic,
2510 				enum nl80211_band band);
2511 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo);
2512 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
2513 				struct ieee80211_sta_s1g_cap *caps,
2514 				struct sk_buff *skb);
2515 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
2516 				  struct sk_buff *skb);
2517 u8 *ieee80211_ie_build_s1g_cap(u8 *pos, struct ieee80211_sta_s1g_cap *s1g_cap);
2518 
2519 /* channel management */
2520 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2521 			       struct cfg80211_chan_def *chandef);
2522 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
2523 				const struct ieee80211_vht_operation *oper,
2524 				const struct ieee80211_ht_operation *htop,
2525 				struct cfg80211_chan_def *chandef);
2526 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation *eht_oper,
2527 				bool support_160, bool support_320,
2528 				struct cfg80211_chan_def *chandef);
2529 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
2530 				    const struct ieee80211_he_operation *he_oper,
2531 				    const struct ieee80211_eht_operation *eht_oper,
2532 				    struct cfg80211_chan_def *chandef);
2533 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
2534 				struct cfg80211_chan_def *chandef);
2535 ieee80211_conn_flags_t ieee80211_chandef_downgrade(struct cfg80211_chan_def *c);
2536 
2537 int __must_check
2538 ieee80211_link_use_channel(struct ieee80211_link_data *link,
2539 			   const struct cfg80211_chan_def *chandef,
2540 			   enum ieee80211_chanctx_mode mode);
2541 int __must_check
2542 ieee80211_link_reserve_chanctx(struct ieee80211_link_data *link,
2543 			       const struct cfg80211_chan_def *chandef,
2544 			       enum ieee80211_chanctx_mode mode,
2545 			       bool radar_required);
2546 int __must_check
2547 ieee80211_link_use_reserved_context(struct ieee80211_link_data *link);
2548 int ieee80211_link_unreserve_chanctx(struct ieee80211_link_data *link);
2549 
2550 int __must_check
2551 ieee80211_link_change_bandwidth(struct ieee80211_link_data *link,
2552 				const struct cfg80211_chan_def *chandef,
2553 				u64 *changed);
2554 void ieee80211_link_release_channel(struct ieee80211_link_data *link);
2555 void ieee80211_link_vlan_copy_chanctx(struct ieee80211_link_data *link);
2556 void ieee80211_link_copy_chanctx_to_vlans(struct ieee80211_link_data *link,
2557 					  bool clear);
2558 int ieee80211_chanctx_refcount(struct ieee80211_local *local,
2559 			       struct ieee80211_chanctx *ctx);
2560 
2561 void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
2562 				   struct ieee80211_chanctx *chanctx);
2563 void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
2564 				      struct ieee80211_chanctx *ctx,
2565 				      struct ieee80211_link_data *rsvd_for);
2566 bool ieee80211_is_radar_required(struct ieee80211_local *local);
2567 
2568 void ieee80211_dfs_cac_timer_work(struct work_struct *work);
2569 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local);
2570 void ieee80211_dfs_radar_detected_work(struct wiphy *wiphy,
2571 				       struct wiphy_work *work);
2572 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2573 			      struct cfg80211_csa_settings *csa_settings);
2574 
2575 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2576 			   struct ieee80211_sub_if_data *sdata);
2577 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2578 				 const struct cfg80211_chan_def *chandef,
2579 				 enum ieee80211_chanctx_mode chanmode,
2580 				 u8 radar_detect);
2581 int ieee80211_max_num_channels(struct ieee80211_local *local);
2582 void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
2583 				       struct ieee80211_chanctx *ctx);
2584 
2585 /* TDLS */
2586 int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
2587 			const u8 *peer, int link_id,
2588 			u8 action_code, u8 dialog_token, u16 status_code,
2589 			u32 peer_capability, bool initiator,
2590 			const u8 *extra_ies, size_t extra_ies_len);
2591 int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
2592 			const u8 *peer, enum nl80211_tdls_operation oper);
2593 void ieee80211_tdls_peer_del_work(struct work_struct *wk);
2594 int ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
2595 				  const u8 *addr, u8 oper_class,
2596 				  struct cfg80211_chan_def *chandef);
2597 void ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
2598 					  struct net_device *dev,
2599 					  const u8 *addr);
2600 void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata);
2601 void ieee80211_tdls_handle_disconnect(struct ieee80211_sub_if_data *sdata,
2602 				      const u8 *peer, u16 reason);
2603 void
2604 ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
2605 				      struct sk_buff *skb);
2606 
2607 
2608 const char *ieee80211_get_reason_code_string(u16 reason_code);
2609 u16 ieee80211_encode_usf(int val);
2610 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
2611 			enum nl80211_iftype type);
2612 
2613 extern const struct ethtool_ops ieee80211_ethtool_ops;
2614 
2615 u32 ieee80211_calc_expected_tx_airtime(struct ieee80211_hw *hw,
2616 				       struct ieee80211_vif *vif,
2617 				       struct ieee80211_sta *pubsta,
2618 				       int len, bool ampdu);
2619 #ifdef CONFIG_MAC80211_NOINLINE
2620 #define debug_noinline noinline
2621 #else
2622 #define debug_noinline
2623 #endif
2624 
2625 void ieee80211_init_frag_cache(struct ieee80211_fragment_cache *cache);
2626 void ieee80211_destroy_frag_cache(struct ieee80211_fragment_cache *cache);
2627 
2628 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype);
2629 u8 *ieee80211_ie_build_eht_cap(u8 *pos,
2630 			       const struct ieee80211_sta_he_cap *he_cap,
2631 			       const struct ieee80211_sta_eht_cap *eht_cap,
2632 			       u8 *end,
2633 			       bool for_ap);
2634 
2635 void
2636 ieee80211_eht_cap_ie_to_sta_eht_cap(struct ieee80211_sub_if_data *sdata,
2637 				    struct ieee80211_supported_band *sband,
2638 				    const u8 *he_cap_ie, u8 he_cap_len,
2639 				    const struct ieee80211_eht_cap_elem *eht_cap_ie_elem,
2640 				    u8 eht_cap_len,
2641 				    struct link_sta_info *link_sta);
2642 #endif /* IEEE80211_I_H */
2643