core.h 18 KB

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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. * Copyright (C) 2018-2020 Intel Corporation
  7. */
  8. #ifndef __NET_WIRELESS_CORE_H
  9. #define __NET_WIRELESS_CORE_H
  10. #include <linux/list.h>
  11. #include <linux/netdevice.h>
  12. #include <linux/rbtree.h>
  13. #include <linux/debugfs.h>
  14. #include <linux/rfkill.h>
  15. #include <linux/workqueue.h>
  16. #include <linux/rtnetlink.h>
  17. #include <net/genetlink.h>
  18. #include <net/cfg80211.h>
  19. #include "reg.h"
  20. #define WIPHY_IDX_INVALID -1
  21. struct cfg80211_registered_device {
  22. const struct cfg80211_ops *ops;
  23. struct list_head list;
  24. /* rfkill support */
  25. struct rfkill_ops rfkill_ops;
  26. struct rfkill *rfkill;
  27. struct work_struct rfkill_block;
  28. /* ISO / IEC 3166 alpha2 for which this device is receiving
  29. * country IEs on, this can help disregard country IEs from APs
  30. * on the same alpha2 quickly. The alpha2 may differ from
  31. * cfg80211_regdomain's alpha2 when an intersection has occurred.
  32. * If the AP is reconfigured this can also be used to tell us if
  33. * the country on the country IE changed. */
  34. char country_ie_alpha2[2];
  35. /*
  36. * the driver requests the regulatory core to set this regulatory
  37. * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED
  38. * devices using the regulatory_set_wiphy_regd() API
  39. */
  40. const struct ieee80211_regdomain *requested_regd;
  41. /* If a Country IE has been received this tells us the environment
  42. * which its telling us its in. This defaults to ENVIRON_ANY */
  43. enum environment_cap env;
  44. /* wiphy index, internal only */
  45. int wiphy_idx;
  46. /* protected by RTNL */
  47. int devlist_generation, wdev_id;
  48. int opencount;
  49. wait_queue_head_t dev_wait;
  50. struct list_head beacon_registrations;
  51. spinlock_t beacon_registrations_lock;
  52. /* protected by RTNL only */
  53. int num_running_ifaces;
  54. int num_running_monitor_ifaces;
  55. u64 cookie_counter;
  56. /* BSSes/scanning */
  57. spinlock_t bss_lock;
  58. struct list_head bss_list;
  59. struct rb_root bss_tree;
  60. u32 bss_generation;
  61. u32 bss_entries;
  62. struct cfg80211_scan_request *scan_req; /* protected by RTNL */
  63. struct cfg80211_scan_request *int_scan_req;
  64. struct sk_buff *scan_msg;
  65. struct list_head sched_scan_req_list;
  66. time64_t suspend_at;
  67. struct work_struct scan_done_wk;
  68. struct genl_info *cur_cmd_info;
  69. struct work_struct conn_work;
  70. struct work_struct event_work;
  71. struct delayed_work dfs_update_channels_wk;
  72. /* netlink port which started critical protocol (0 means not started) */
  73. u32 crit_proto_nlportid;
  74. struct cfg80211_coalesce *coalesce;
  75. struct work_struct destroy_work;
  76. struct work_struct sched_scan_stop_wk;
  77. struct work_struct sched_scan_res_wk;
  78. struct cfg80211_chan_def radar_chandef;
  79. struct work_struct propagate_radar_detect_wk;
  80. struct cfg80211_chan_def cac_done_chandef;
  81. struct work_struct propagate_cac_done_wk;
  82. struct work_struct mgmt_registrations_update_wk;
  83. /* lock for all wdev lists */
  84. spinlock_t mgmt_registrations_lock;
  85. /* must be last because of the way we do wiphy_priv(),
  86. * and it should at least be aligned to NETDEV_ALIGN */
  87. struct wiphy wiphy __aligned(NETDEV_ALIGN);
  88. };
  89. static inline
  90. struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
  91. {
  92. BUG_ON(!wiphy);
  93. return container_of(wiphy, struct cfg80211_registered_device, wiphy);
  94. }
  95. static inline void
  96. cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
  97. {
  98. #ifdef CONFIG_PM
  99. int i;
  100. if (!rdev->wiphy.wowlan_config)
  101. return;
  102. for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
  103. kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
  104. kfree(rdev->wiphy.wowlan_config->patterns);
  105. if (rdev->wiphy.wowlan_config->tcp &&
  106. rdev->wiphy.wowlan_config->tcp->sock)
  107. sock_release(rdev->wiphy.wowlan_config->tcp->sock);
  108. kfree(rdev->wiphy.wowlan_config->tcp);
  109. kfree(rdev->wiphy.wowlan_config->nd_config);
  110. kfree(rdev->wiphy.wowlan_config);
  111. #endif
  112. }
  113. static inline u64 cfg80211_assign_cookie(struct cfg80211_registered_device *rdev)
  114. {
  115. u64 r = ++rdev->cookie_counter;
  116. if (WARN_ON(r == 0))
  117. r = ++rdev->cookie_counter;
  118. return r;
  119. }
  120. extern struct workqueue_struct *cfg80211_wq;
  121. extern struct list_head cfg80211_rdev_list;
  122. extern int cfg80211_rdev_list_generation;
  123. struct cfg80211_internal_bss {
  124. struct list_head list;
  125. struct list_head hidden_list;
  126. struct rb_node rbn;
  127. u64 ts_boottime;
  128. unsigned long ts;
  129. unsigned long refcount;
  130. atomic_t hold;
  131. /* time at the start of the reception of the first octet of the
  132. * timestamp field of the last beacon/probe received for this BSS.
  133. * The time is the TSF of the BSS specified by %parent_bssid.
  134. */
  135. u64 parent_tsf;
  136. /* the BSS according to which %parent_tsf is set. This is set to
  137. * the BSS that the interface that requested the scan was connected to
  138. * when the beacon/probe was received.
  139. */
  140. u8 parent_bssid[ETH_ALEN] __aligned(2);
  141. /* must be last because of priv member */
  142. struct cfg80211_bss pub;
  143. };
  144. static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
  145. {
  146. return container_of(pub, struct cfg80211_internal_bss, pub);
  147. }
  148. static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
  149. {
  150. atomic_inc(&bss->hold);
  151. if (bss->pub.transmitted_bss) {
  152. bss = container_of(bss->pub.transmitted_bss,
  153. struct cfg80211_internal_bss, pub);
  154. atomic_inc(&bss->hold);
  155. }
  156. }
  157. static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
  158. {
  159. int r = atomic_dec_return(&bss->hold);
  160. WARN_ON(r < 0);
  161. if (bss->pub.transmitted_bss) {
  162. bss = container_of(bss->pub.transmitted_bss,
  163. struct cfg80211_internal_bss, pub);
  164. r = atomic_dec_return(&bss->hold);
  165. WARN_ON(r < 0);
  166. }
  167. }
  168. struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
  169. int get_wiphy_idx(struct wiphy *wiphy);
  170. struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
  171. int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
  172. struct net *net);
  173. void cfg80211_init_wdev(struct wireless_dev *wdev);
  174. void cfg80211_register_wdev(struct cfg80211_registered_device *rdev,
  175. struct wireless_dev *wdev);
  176. static inline void wdev_lock(struct wireless_dev *wdev)
  177. __acquires(wdev)
  178. {
  179. mutex_lock(&wdev->mtx);
  180. __acquire(wdev->mtx);
  181. }
  182. static inline void wdev_unlock(struct wireless_dev *wdev)
  183. __releases(wdev)
  184. {
  185. __release(wdev->mtx);
  186. mutex_unlock(&wdev->mtx);
  187. }
  188. #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
  189. static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
  190. {
  191. ASSERT_RTNL();
  192. return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
  193. rdev->num_running_ifaces > 0;
  194. }
  195. enum cfg80211_event_type {
  196. EVENT_CONNECT_RESULT,
  197. EVENT_ROAMED,
  198. EVENT_DISCONNECTED,
  199. EVENT_IBSS_JOINED,
  200. EVENT_STOPPED,
  201. EVENT_PORT_AUTHORIZED,
  202. };
  203. struct cfg80211_event {
  204. struct list_head list;
  205. enum cfg80211_event_type type;
  206. union {
  207. struct cfg80211_connect_resp_params cr;
  208. struct cfg80211_roam_info rm;
  209. struct {
  210. const u8 *ie;
  211. size_t ie_len;
  212. u16 reason;
  213. bool locally_generated;
  214. } dc;
  215. struct {
  216. u8 bssid[ETH_ALEN];
  217. struct ieee80211_channel *channel;
  218. } ij;
  219. struct {
  220. u8 bssid[ETH_ALEN];
  221. } pa;
  222. };
  223. };
  224. struct cfg80211_cached_keys {
  225. struct key_params params[CFG80211_MAX_WEP_KEYS];
  226. u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104];
  227. int def;
  228. };
  229. enum cfg80211_chan_mode {
  230. CHAN_MODE_UNDEFINED,
  231. CHAN_MODE_SHARED,
  232. CHAN_MODE_EXCLUSIVE,
  233. };
  234. struct cfg80211_beacon_registration {
  235. struct list_head list;
  236. u32 nlportid;
  237. };
  238. struct cfg80211_cqm_config {
  239. u32 rssi_hyst;
  240. s32 last_rssi_event_value;
  241. int n_rssi_thresholds;
  242. s32 rssi_thresholds[];
  243. };
  244. void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
  245. /* free object */
  246. void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
  247. int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
  248. char *newname);
  249. void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
  250. void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
  251. void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
  252. unsigned long age_secs);
  253. void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev,
  254. struct ieee80211_channel *channel);
  255. /* IBSS */
  256. int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
  257. struct net_device *dev,
  258. struct cfg80211_ibss_params *params,
  259. struct cfg80211_cached_keys *connkeys);
  260. void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
  261. int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
  262. struct net_device *dev, bool nowext);
  263. int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
  264. struct net_device *dev, bool nowext);
  265. void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
  266. struct ieee80211_channel *channel);
  267. int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
  268. struct wireless_dev *wdev);
  269. /* mesh */
  270. extern const struct mesh_config default_mesh_config;
  271. extern const struct mesh_setup default_mesh_setup;
  272. int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
  273. struct net_device *dev,
  274. struct mesh_setup *setup,
  275. const struct mesh_config *conf);
  276. int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
  277. struct net_device *dev);
  278. int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
  279. struct net_device *dev);
  280. int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
  281. struct wireless_dev *wdev,
  282. struct cfg80211_chan_def *chandef);
  283. /* OCB */
  284. int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
  285. struct net_device *dev,
  286. struct ocb_setup *setup);
  287. int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
  288. struct net_device *dev,
  289. struct ocb_setup *setup);
  290. int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
  291. struct net_device *dev);
  292. int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
  293. struct net_device *dev);
  294. /* AP */
  295. int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
  296. struct net_device *dev, bool notify);
  297. int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
  298. struct net_device *dev, bool notify);
  299. /* MLME */
  300. int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
  301. struct net_device *dev,
  302. struct ieee80211_channel *chan,
  303. enum nl80211_auth_type auth_type,
  304. const u8 *bssid,
  305. const u8 *ssid, int ssid_len,
  306. const u8 *ie, int ie_len,
  307. const u8 *key, int key_len, int key_idx,
  308. const u8 *auth_data, int auth_data_len);
  309. int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
  310. struct net_device *dev,
  311. struct ieee80211_channel *chan,
  312. const u8 *bssid,
  313. const u8 *ssid, int ssid_len,
  314. struct cfg80211_assoc_request *req);
  315. int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
  316. struct net_device *dev, const u8 *bssid,
  317. const u8 *ie, int ie_len, u16 reason,
  318. bool local_state_change);
  319. int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
  320. struct net_device *dev, const u8 *bssid,
  321. const u8 *ie, int ie_len, u16 reason,
  322. bool local_state_change);
  323. void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
  324. struct net_device *dev);
  325. int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
  326. u16 frame_type, const u8 *match_data,
  327. int match_len, bool multicast_rx,
  328. struct netlink_ext_ack *extack);
  329. void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk);
  330. void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
  331. void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
  332. int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
  333. struct wireless_dev *wdev,
  334. struct cfg80211_mgmt_tx_params *params,
  335. u64 *cookie);
  336. void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
  337. const struct ieee80211_ht_cap *ht_capa_mask);
  338. void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
  339. const struct ieee80211_vht_cap *vht_capa_mask);
  340. /* SME events */
  341. int cfg80211_connect(struct cfg80211_registered_device *rdev,
  342. struct net_device *dev,
  343. struct cfg80211_connect_params *connect,
  344. struct cfg80211_cached_keys *connkeys,
  345. const u8 *prev_bssid);
  346. void __cfg80211_connect_result(struct net_device *dev,
  347. struct cfg80211_connect_resp_params *params,
  348. bool wextev);
  349. void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
  350. size_t ie_len, u16 reason, bool from_ap);
  351. int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
  352. struct net_device *dev, u16 reason,
  353. bool wextev);
  354. void __cfg80211_roamed(struct wireless_dev *wdev,
  355. struct cfg80211_roam_info *info);
  356. void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid);
  357. int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
  358. struct wireless_dev *wdev);
  359. void cfg80211_autodisconnect_wk(struct work_struct *work);
  360. /* SME implementation */
  361. void cfg80211_conn_work(struct work_struct *work);
  362. void cfg80211_sme_scan_done(struct net_device *dev);
  363. bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
  364. void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
  365. void cfg80211_sme_disassoc(struct wireless_dev *wdev);
  366. void cfg80211_sme_deauth(struct wireless_dev *wdev);
  367. void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
  368. void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
  369. void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev);
  370. /* internal helpers */
  371. bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
  372. bool cfg80211_valid_key_idx(struct cfg80211_registered_device *rdev,
  373. int key_idx, bool pairwise);
  374. int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
  375. struct key_params *params, int key_idx,
  376. bool pairwise, const u8 *mac_addr);
  377. void __cfg80211_scan_done(struct work_struct *wk);
  378. void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
  379. bool send_message);
  380. void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev,
  381. struct cfg80211_sched_scan_request *req);
  382. int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev,
  383. bool want_multi);
  384. void cfg80211_sched_scan_results_wk(struct work_struct *work);
  385. int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev,
  386. struct cfg80211_sched_scan_request *req,
  387. bool driver_initiated);
  388. int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
  389. u64 reqid, bool driver_initiated);
  390. void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
  391. int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
  392. struct net_device *dev, enum nl80211_iftype ntype,
  393. struct vif_params *params);
  394. void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
  395. void cfg80211_process_wdev_events(struct wireless_dev *wdev);
  396. bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
  397. u32 center_freq_khz, u32 bw_khz);
  398. int cfg80211_scan(struct cfg80211_registered_device *rdev);
  399. extern struct work_struct cfg80211_disconnect_work;
  400. /**
  401. * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
  402. * @wiphy: the wiphy to validate against
  403. * @chandef: the channel definition to check
  404. *
  405. * Checks if chandef is usable and we can/need start CAC on such channel.
  406. *
  407. * Return: true if all channels available and at least
  408. * one channel requires CAC (NL80211_DFS_USABLE)
  409. */
  410. bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
  411. const struct cfg80211_chan_def *chandef);
  412. void cfg80211_set_dfs_state(struct wiphy *wiphy,
  413. const struct cfg80211_chan_def *chandef,
  414. enum nl80211_dfs_state dfs_state);
  415. void cfg80211_dfs_channels_update_work(struct work_struct *work);
  416. unsigned int
  417. cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
  418. const struct cfg80211_chan_def *chandef);
  419. void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev);
  420. bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
  421. struct ieee80211_channel *chan);
  422. bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev);
  423. bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef,
  424. struct ieee80211_channel *chan);
  425. static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
  426. {
  427. unsigned long end = jiffies;
  428. if (end >= start)
  429. return jiffies_to_msecs(end - start);
  430. return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
  431. }
  432. void
  433. cfg80211_get_chan_state(struct wireless_dev *wdev,
  434. struct ieee80211_channel **chan,
  435. enum cfg80211_chan_mode *chanmode,
  436. u8 *radar_detect);
  437. int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
  438. struct cfg80211_chan_def *chandef);
  439. int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
  440. const u8 *rates, unsigned int n_rates,
  441. u32 *mask);
  442. int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
  443. enum nl80211_iftype iftype, u32 beacon_int);
  444. void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
  445. enum nl80211_iftype iftype, int num);
  446. void __cfg80211_leave(struct cfg80211_registered_device *rdev,
  447. struct wireless_dev *wdev);
  448. void cfg80211_leave(struct cfg80211_registered_device *rdev,
  449. struct wireless_dev *wdev);
  450. void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
  451. struct wireless_dev *wdev);
  452. void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
  453. struct wireless_dev *wdev);
  454. struct cfg80211_internal_bss *
  455. cfg80211_bss_update(struct cfg80211_registered_device *rdev,
  456. struct cfg80211_internal_bss *tmp,
  457. bool signal_valid, unsigned long ts);
  458. #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
  459. #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
  460. #else
  461. /*
  462. * Trick to enable using it as a condition,
  463. * and also not give a warning when it's
  464. * not used that way.
  465. */
  466. #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
  467. #endif
  468. void cfg80211_cqm_config_free(struct wireless_dev *wdev);
  469. void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid);
  470. void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev);
  471. void cfg80211_pmsr_free_wk(struct work_struct *work);
  472. #endif /* __NET_WIRELESS_CORE_H */