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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Wireless configuration interface internals.
4 *
5 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
6 */
7#ifndef __NET_WIRELESS_CORE_H
8#define __NET_WIRELESS_CORE_H
9#include <linux/list.h>
10#include <linux/netdevice.h>
11#include <linux/rbtree.h>
12#include <linux/debugfs.h>
13#include <linux/rfkill.h>
14#include <linux/workqueue.h>
15#include <linux/rtnetlink.h>
16#include <net/genetlink.h>
17#include <net/cfg80211.h>
18#include "reg.h"
19
20
21#define WIPHY_IDX_INVALID -1
22
23struct cfg80211_registered_device {
24 const struct cfg80211_ops *ops;
25 struct list_head list;
26
27 /* rfkill support */
28 struct rfkill_ops rfkill_ops;
29 struct rfkill *rfkill;
30 struct work_struct rfkill_sync;
31
32 /* ISO / IEC 3166 alpha2 for which this device is receiving
33 * country IEs on, this can help disregard country IEs from APs
34 * on the same alpha2 quickly. The alpha2 may differ from
35 * cfg80211_regdomain's alpha2 when an intersection has occurred.
36 * If the AP is reconfigured this can also be used to tell us if
37 * the country on the country IE changed. */
38 char country_ie_alpha2[2];
39
40 /*
41 * the driver requests the regulatory core to set this regulatory
42 * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED
43 * devices using the regulatory_set_wiphy_regd() API
44 */
45 const struct ieee80211_regdomain *requested_regd;
46
47 /* If a Country IE has been received this tells us the environment
48 * which its telling us its in. This defaults to ENVIRON_ANY */
49 enum environment_cap env;
50
51 /* wiphy index, internal only */
52 int wiphy_idx;
53
54 /* protected by RTNL */
55 int devlist_generation, wdev_id;
56 int opencount;
57 wait_queue_head_t dev_wait;
58
59 struct list_head beacon_registrations;
60 spinlock_t beacon_registrations_lock;
61
62 struct list_head mlme_unreg;
63 spinlock_t mlme_unreg_lock;
64 struct work_struct mlme_unreg_wk;
65
66 /* protected by RTNL only */
67 int num_running_ifaces;
68 int num_running_monitor_ifaces;
69 u64 cookie_counter;
70
71 /* BSSes/scanning */
72 spinlock_t bss_lock;
73 struct list_head bss_list;
74 struct rb_root bss_tree;
75 u32 bss_generation;
76 u32 bss_entries;
77 struct cfg80211_scan_request *scan_req; /* protected by RTNL */
78 struct sk_buff *scan_msg;
79 struct list_head sched_scan_req_list;
80 time64_t suspend_at;
81 struct work_struct scan_done_wk;
82
83 struct genl_info *cur_cmd_info;
84
85 struct work_struct conn_work;
86 struct work_struct event_work;
87
88 struct delayed_work dfs_update_channels_wk;
89
90 /* netlink port which started critical protocol (0 means not started) */
91 u32 crit_proto_nlportid;
92
93 struct cfg80211_coalesce *coalesce;
94
95 struct work_struct destroy_work;
96 struct work_struct sched_scan_stop_wk;
97 struct work_struct sched_scan_res_wk;
98
99 struct cfg80211_chan_def radar_chandef;
100 struct work_struct propagate_radar_detect_wk;
101
102 struct cfg80211_chan_def cac_done_chandef;
103 struct work_struct propagate_cac_done_wk;
104
105 /* must be last because of the way we do wiphy_priv(),
106 * and it should at least be aligned to NETDEV_ALIGN */
107 struct wiphy wiphy __aligned(NETDEV_ALIGN);
108};
109
110static inline
111struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
112{
113 BUG_ON(!wiphy);
114 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
115}
116
117static inline void
118cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
119{
120#ifdef CONFIG_PM
121 int i;
122
123 if (!rdev->wiphy.wowlan_config)
124 return;
125 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
126 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
127 kfree(rdev->wiphy.wowlan_config->patterns);
128 if (rdev->wiphy.wowlan_config->tcp &&
129 rdev->wiphy.wowlan_config->tcp->sock)
130 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
131 kfree(rdev->wiphy.wowlan_config->tcp);
132 kfree(rdev->wiphy.wowlan_config->nd_config);
133 kfree(rdev->wiphy.wowlan_config);
134#endif
135}
136
137static inline u64 cfg80211_assign_cookie(struct cfg80211_registered_device *rdev)
138{
139 u64 r = ++rdev->cookie_counter;
140
141 if (WARN_ON(r == 0))
142 r = ++rdev->cookie_counter;
143
144 return r;
145}
146
147extern struct workqueue_struct *cfg80211_wq;
148extern struct list_head cfg80211_rdev_list;
149extern int cfg80211_rdev_list_generation;
150
151struct cfg80211_internal_bss {
152 struct list_head list;
153 struct list_head hidden_list;
154 struct rb_node rbn;
155 u64 ts_boottime;
156 unsigned long ts;
157 unsigned long refcount;
158 atomic_t hold;
159
160 /* time at the start of the reception of the first octet of the
161 * timestamp field of the last beacon/probe received for this BSS.
162 * The time is the TSF of the BSS specified by %parent_bssid.
163 */
164 u64 parent_tsf;
165
166 /* the BSS according to which %parent_tsf is set. This is set to
167 * the BSS that the interface that requested the scan was connected to
168 * when the beacon/probe was received.
169 */
170 u8 parent_bssid[ETH_ALEN] __aligned(2);
171
172 /* must be last because of priv member */
173 struct cfg80211_bss pub;
174};
175
176static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
177{
178 return container_of(pub, struct cfg80211_internal_bss, pub);
179}
180
181static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
182{
183 atomic_inc(&bss->hold);
184}
185
186static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
187{
188 int r = atomic_dec_return(&bss->hold);
189 WARN_ON(r < 0);
190}
191
192
193struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
194int get_wiphy_idx(struct wiphy *wiphy);
195
196struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
197
198int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
199 struct net *net);
200
201void cfg80211_init_wdev(struct cfg80211_registered_device *rdev,
202 struct wireless_dev *wdev);
203
204static inline void wdev_lock(struct wireless_dev *wdev)
205 __acquires(wdev)
206{
207 mutex_lock(&wdev->mtx);
208 __acquire(wdev->mtx);
209}
210
211static inline void wdev_unlock(struct wireless_dev *wdev)
212 __releases(wdev)
213{
214 __release(wdev->mtx);
215 mutex_unlock(&wdev->mtx);
216}
217
218#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
219
220static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
221{
222 ASSERT_RTNL();
223
224 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
225 rdev->num_running_ifaces > 0;
226}
227
228enum cfg80211_event_type {
229 EVENT_CONNECT_RESULT,
230 EVENT_ROAMED,
231 EVENT_DISCONNECTED,
232 EVENT_IBSS_JOINED,
233 EVENT_STOPPED,
234 EVENT_PORT_AUTHORIZED,
235};
236
237struct cfg80211_event {
238 struct list_head list;
239 enum cfg80211_event_type type;
240
241 union {
242 struct cfg80211_connect_resp_params cr;
243 struct cfg80211_roam_info rm;
244 struct {
245 const u8 *ie;
246 size_t ie_len;
247 u16 reason;
248 bool locally_generated;
249 } dc;
250 struct {
251 u8 bssid[ETH_ALEN];
252 struct ieee80211_channel *channel;
253 } ij;
254 struct {
255 u8 bssid[ETH_ALEN];
256 } pa;
257 };
258};
259
260struct cfg80211_cached_keys {
261 struct key_params params[CFG80211_MAX_WEP_KEYS];
262 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104];
263 int def;
264};
265
266enum cfg80211_chan_mode {
267 CHAN_MODE_UNDEFINED,
268 CHAN_MODE_SHARED,
269 CHAN_MODE_EXCLUSIVE,
270};
271
272struct cfg80211_beacon_registration {
273 struct list_head list;
274 u32 nlportid;
275};
276
277struct cfg80211_cqm_config {
278 u32 rssi_hyst;
279 s32 last_rssi_event_value;
280 int n_rssi_thresholds;
281 s32 rssi_thresholds[0];
282};
283
284void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
285
286/* free object */
287void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
288
289int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
290 char *newname);
291
292void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
293
294void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
295void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
296 unsigned long age_secs);
297
298/* IBSS */
299int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
300 struct net_device *dev,
301 struct cfg80211_ibss_params *params,
302 struct cfg80211_cached_keys *connkeys);
303void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
304int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
305 struct net_device *dev, bool nowext);
306int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
307 struct net_device *dev, bool nowext);
308void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
309 struct ieee80211_channel *channel);
310int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
311 struct wireless_dev *wdev);
312
313/* mesh */
314extern const struct mesh_config default_mesh_config;
315extern const struct mesh_setup default_mesh_setup;
316int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
317 struct net_device *dev,
318 struct mesh_setup *setup,
319 const struct mesh_config *conf);
320int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
321 struct net_device *dev);
322int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
323 struct net_device *dev);
324int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
325 struct wireless_dev *wdev,
326 struct cfg80211_chan_def *chandef);
327
328/* OCB */
329int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
330 struct net_device *dev,
331 struct ocb_setup *setup);
332int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
333 struct net_device *dev,
334 struct ocb_setup *setup);
335int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
336 struct net_device *dev);
337int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
338 struct net_device *dev);
339
340/* AP */
341int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
342 struct net_device *dev, bool notify);
343int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
344 struct net_device *dev, bool notify);
345
346/* MLME */
347int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
348 struct net_device *dev,
349 struct ieee80211_channel *chan,
350 enum nl80211_auth_type auth_type,
351 const u8 *bssid,
352 const u8 *ssid, int ssid_len,
353 const u8 *ie, int ie_len,
354 const u8 *key, int key_len, int key_idx,
355 const u8 *auth_data, int auth_data_len);
356int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
357 struct net_device *dev,
358 struct ieee80211_channel *chan,
359 const u8 *bssid,
360 const u8 *ssid, int ssid_len,
361 struct cfg80211_assoc_request *req);
362int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
363 struct net_device *dev, const u8 *bssid,
364 const u8 *ie, int ie_len, u16 reason,
365 bool local_state_change);
366int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
367 struct net_device *dev, const u8 *bssid,
368 const u8 *ie, int ie_len, u16 reason,
369 bool local_state_change);
370void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
371 struct net_device *dev);
372int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
373 u16 frame_type, const u8 *match_data,
374 int match_len);
375void cfg80211_mlme_unreg_wk(struct work_struct *wk);
376void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
377void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
378int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
379 struct wireless_dev *wdev,
380 struct cfg80211_mgmt_tx_params *params,
381 u64 *cookie);
382void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
383 const struct ieee80211_ht_cap *ht_capa_mask);
384void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
385 const struct ieee80211_vht_cap *vht_capa_mask);
386
387/* SME events */
388int cfg80211_connect(struct cfg80211_registered_device *rdev,
389 struct net_device *dev,
390 struct cfg80211_connect_params *connect,
391 struct cfg80211_cached_keys *connkeys,
392 const u8 *prev_bssid);
393void __cfg80211_connect_result(struct net_device *dev,
394 struct cfg80211_connect_resp_params *params,
395 bool wextev);
396void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
397 size_t ie_len, u16 reason, bool from_ap);
398int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
399 struct net_device *dev, u16 reason,
400 bool wextev);
401void __cfg80211_roamed(struct wireless_dev *wdev,
402 struct cfg80211_roam_info *info);
403void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid);
404int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
405 struct wireless_dev *wdev);
406void cfg80211_autodisconnect_wk(struct work_struct *work);
407
408/* SME implementation */
409void cfg80211_conn_work(struct work_struct *work);
410void cfg80211_sme_scan_done(struct net_device *dev);
411bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
412void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
413void cfg80211_sme_disassoc(struct wireless_dev *wdev);
414void cfg80211_sme_deauth(struct wireless_dev *wdev);
415void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
416void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
417void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev);
418
419/* internal helpers */
420bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
421int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
422 struct key_params *params, int key_idx,
423 bool pairwise, const u8 *mac_addr);
424void __cfg80211_scan_done(struct work_struct *wk);
425void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
426 bool send_message);
427void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev,
428 struct cfg80211_sched_scan_request *req);
429int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev,
430 bool want_multi);
431void cfg80211_sched_scan_results_wk(struct work_struct *work);
432int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev,
433 struct cfg80211_sched_scan_request *req,
434 bool driver_initiated);
435int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
436 u64 reqid, bool driver_initiated);
437void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
438int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
439 struct net_device *dev, enum nl80211_iftype ntype,
440 struct vif_params *params);
441void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
442void cfg80211_process_wdev_events(struct wireless_dev *wdev);
443
444bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
445 u32 center_freq_khz, u32 bw_khz);
446
447/**
448 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
449 * @wiphy: the wiphy to validate against
450 * @chandef: the channel definition to check
451 *
452 * Checks if chandef is usable and we can/need start CAC on such channel.
453 *
454 * Return: Return true if all channels available and at least
455 * one channel require CAC (NL80211_DFS_USABLE)
456 */
457bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
458 const struct cfg80211_chan_def *chandef);
459
460void cfg80211_set_dfs_state(struct wiphy *wiphy,
461 const struct cfg80211_chan_def *chandef,
462 enum nl80211_dfs_state dfs_state);
463
464void cfg80211_dfs_channels_update_work(struct work_struct *work);
465
466unsigned int
467cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
468 const struct cfg80211_chan_def *chandef);
469
470void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev);
471
472bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
473 struct ieee80211_channel *chan);
474
475bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev);
476
477bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef,
478 struct ieee80211_channel *chan);
479
480static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
481{
482 unsigned long end = jiffies;
483
484 if (end >= start)
485 return jiffies_to_msecs(end - start);
486
487 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
488}
489
490void
491cfg80211_get_chan_state(struct wireless_dev *wdev,
492 struct ieee80211_channel **chan,
493 enum cfg80211_chan_mode *chanmode,
494 u8 *radar_detect);
495
496int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
497 struct cfg80211_chan_def *chandef);
498
499int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
500 const u8 *rates, unsigned int n_rates,
501 u32 *mask);
502
503int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
504 enum nl80211_iftype iftype, u32 beacon_int);
505
506void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
507 enum nl80211_iftype iftype, int num);
508
509void __cfg80211_leave(struct cfg80211_registered_device *rdev,
510 struct wireless_dev *wdev);
511void cfg80211_leave(struct cfg80211_registered_device *rdev,
512 struct wireless_dev *wdev);
513
514void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
515 struct wireless_dev *wdev);
516
517void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
518 struct wireless_dev *wdev);
519
520#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
521#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
522#else
523/*
524 * Trick to enable using it as a condition,
525 * and also not give a warning when it's
526 * not used that way.
527 */
528#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
529#endif
530
531void cfg80211_cqm_config_free(struct wireless_dev *wdev);
532
533#endif /* __NET_WIRELESS_CORE_H */