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1/*
2 * Wireless configuration interface internals.
3 *
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
5 */
6#ifndef __NET_WIRELESS_CORE_H
7#define __NET_WIRELESS_CORE_H
8#include <linux/list.h>
9#include <linux/netdevice.h>
10#include <linux/rbtree.h>
11#include <linux/debugfs.h>
12#include <linux/rfkill.h>
13#include <linux/workqueue.h>
14#include <linux/rtnetlink.h>
15#include <net/genetlink.h>
16#include <net/cfg80211.h>
17#include "reg.h"
18
19
20#define WIPHY_IDX_INVALID -1
21
22struct cfg80211_registered_device {
23 const struct cfg80211_ops *ops;
24 struct list_head list;
25
26 /* rfkill support */
27 struct rfkill_ops rfkill_ops;
28 struct rfkill *rfkill;
29 struct work_struct rfkill_sync;
30
31 /* ISO / IEC 3166 alpha2 for which this device is receiving
32 * country IEs on, this can help disregard country IEs from APs
33 * on the same alpha2 quickly. The alpha2 may differ from
34 * cfg80211_regdomain's alpha2 when an intersection has occurred.
35 * If the AP is reconfigured this can also be used to tell us if
36 * the country on the country IE changed. */
37 char country_ie_alpha2[2];
38
39 /*
40 * the driver requests the regulatory core to set this regulatory
41 * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED
42 * devices using the regulatory_set_wiphy_regd() API
43 */
44 const struct ieee80211_regdomain *requested_regd;
45
46 /* If a Country IE has been received this tells us the environment
47 * which its telling us its in. This defaults to ENVIRON_ANY */
48 enum environment_cap env;
49
50 /* wiphy index, internal only */
51 int wiphy_idx;
52
53 /* associated wireless interfaces, protected by rtnl or RCU */
54 struct list_head wdev_list;
55 int devlist_generation, wdev_id;
56 int opencount; /* also protected by devlist_mtx */
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
70 /* BSSes/scanning */
71 spinlock_t bss_lock;
72 struct list_head bss_list;
73 struct rb_root bss_tree;
74 u32 bss_generation;
75 struct cfg80211_scan_request *scan_req; /* protected by RTNL */
76 struct sk_buff *scan_msg;
77 struct cfg80211_sched_scan_request __rcu *sched_scan_req;
78 unsigned long suspend_at;
79 struct work_struct scan_done_wk;
80 struct work_struct sched_scan_results_wk;
81
82 struct genl_info *cur_cmd_info;
83
84 struct work_struct conn_work;
85 struct work_struct event_work;
86
87 struct delayed_work dfs_update_channels_wk;
88
89 /* netlink port which started critical protocol (0 means not started) */
90 u32 crit_proto_nlportid;
91
92 struct cfg80211_coalesce *coalesce;
93
94 spinlock_t destroy_list_lock;
95 struct list_head destroy_list;
96 struct work_struct destroy_work;
97
98 struct work_struct sched_scan_stop_wk;
99
100 /* must be last because of the way we do wiphy_priv(),
101 * and it should at least be aligned to NETDEV_ALIGN */
102 struct wiphy wiphy __aligned(NETDEV_ALIGN);
103};
104
105static inline
106struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
107{
108 BUG_ON(!wiphy);
109 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
110}
111
112static inline void
113cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
114{
115#ifdef CONFIG_PM
116 int i;
117
118 if (!rdev->wiphy.wowlan_config)
119 return;
120 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
121 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
122 kfree(rdev->wiphy.wowlan_config->patterns);
123 if (rdev->wiphy.wowlan_config->tcp &&
124 rdev->wiphy.wowlan_config->tcp->sock)
125 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
126 kfree(rdev->wiphy.wowlan_config->tcp);
127 kfree(rdev->wiphy.wowlan_config->nd_config);
128 kfree(rdev->wiphy.wowlan_config);
129#endif
130}
131
132extern struct workqueue_struct *cfg80211_wq;
133extern struct list_head cfg80211_rdev_list;
134extern int cfg80211_rdev_list_generation;
135
136struct cfg80211_internal_bss {
137 struct list_head list;
138 struct list_head hidden_list;
139 struct rb_node rbn;
140 unsigned long ts;
141 unsigned long refcount;
142 atomic_t hold;
143
144 /* must be last because of priv member */
145 struct cfg80211_bss pub;
146};
147
148static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
149{
150 return container_of(pub, struct cfg80211_internal_bss, pub);
151}
152
153static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
154{
155 atomic_inc(&bss->hold);
156}
157
158static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
159{
160 int r = atomic_dec_return(&bss->hold);
161 WARN_ON(r < 0);
162}
163
164
165struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
166int get_wiphy_idx(struct wiphy *wiphy);
167
168struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
169
170int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
171 struct net *net);
172
173static inline void wdev_lock(struct wireless_dev *wdev)
174 __acquires(wdev)
175{
176 mutex_lock(&wdev->mtx);
177 __acquire(wdev->mtx);
178}
179
180static inline void wdev_unlock(struct wireless_dev *wdev)
181 __releases(wdev)
182{
183 __release(wdev->mtx);
184 mutex_unlock(&wdev->mtx);
185}
186
187#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
188
189static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
190{
191 ASSERT_RTNL();
192
193 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
194 rdev->num_running_ifaces > 0;
195}
196
197enum cfg80211_event_type {
198 EVENT_CONNECT_RESULT,
199 EVENT_ROAMED,
200 EVENT_DISCONNECTED,
201 EVENT_IBSS_JOINED,
202 EVENT_STOPPED,
203};
204
205struct cfg80211_event {
206 struct list_head list;
207 enum cfg80211_event_type type;
208
209 union {
210 struct {
211 u8 bssid[ETH_ALEN];
212 const u8 *req_ie;
213 const u8 *resp_ie;
214 size_t req_ie_len;
215 size_t resp_ie_len;
216 u16 status;
217 } cr;
218 struct {
219 const u8 *req_ie;
220 const u8 *resp_ie;
221 size_t req_ie_len;
222 size_t resp_ie_len;
223 struct cfg80211_bss *bss;
224 } rm;
225 struct {
226 const u8 *ie;
227 size_t ie_len;
228 u16 reason;
229 bool locally_generated;
230 } dc;
231 struct {
232 u8 bssid[ETH_ALEN];
233 struct ieee80211_channel *channel;
234 } ij;
235 };
236};
237
238struct cfg80211_cached_keys {
239 struct key_params params[6];
240 u8 data[6][WLAN_MAX_KEY_LEN];
241 int def, defmgmt;
242};
243
244enum cfg80211_chan_mode {
245 CHAN_MODE_UNDEFINED,
246 CHAN_MODE_SHARED,
247 CHAN_MODE_EXCLUSIVE,
248};
249
250struct cfg80211_beacon_registration {
251 struct list_head list;
252 u32 nlportid;
253};
254
255struct cfg80211_iface_destroy {
256 struct list_head list;
257 u32 nlportid;
258};
259
260void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
261
262/* free object */
263void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
264
265int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
266 char *newname);
267
268void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
269
270void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
271void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
272 unsigned long age_secs);
273
274/* IBSS */
275int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
276 struct net_device *dev,
277 struct cfg80211_ibss_params *params,
278 struct cfg80211_cached_keys *connkeys);
279void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
280int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
281 struct net_device *dev, bool nowext);
282int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
283 struct net_device *dev, bool nowext);
284void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
285 struct ieee80211_channel *channel);
286int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
287 struct wireless_dev *wdev);
288
289/* mesh */
290extern const struct mesh_config default_mesh_config;
291extern const struct mesh_setup default_mesh_setup;
292int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
293 struct net_device *dev,
294 struct mesh_setup *setup,
295 const struct mesh_config *conf);
296int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
297 struct net_device *dev,
298 struct mesh_setup *setup,
299 const struct mesh_config *conf);
300int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
301 struct net_device *dev);
302int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
303 struct net_device *dev);
304int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
305 struct wireless_dev *wdev,
306 struct cfg80211_chan_def *chandef);
307
308/* OCB */
309int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
310 struct net_device *dev,
311 struct ocb_setup *setup);
312int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
313 struct net_device *dev,
314 struct ocb_setup *setup);
315int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
316 struct net_device *dev);
317int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
318 struct net_device *dev);
319
320/* AP */
321int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
322 struct net_device *dev, bool notify);
323int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
324 struct net_device *dev, bool notify);
325
326/* MLME */
327int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
328 struct net_device *dev,
329 struct ieee80211_channel *chan,
330 enum nl80211_auth_type auth_type,
331 const u8 *bssid,
332 const u8 *ssid, int ssid_len,
333 const u8 *ie, int ie_len,
334 const u8 *key, int key_len, int key_idx,
335 const u8 *sae_data, int sae_data_len);
336int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
337 struct net_device *dev,
338 struct ieee80211_channel *chan,
339 const u8 *bssid,
340 const u8 *ssid, int ssid_len,
341 struct cfg80211_assoc_request *req);
342int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
343 struct net_device *dev, const u8 *bssid,
344 const u8 *ie, int ie_len, u16 reason,
345 bool local_state_change);
346int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
347 struct net_device *dev, const u8 *bssid,
348 const u8 *ie, int ie_len, u16 reason,
349 bool local_state_change);
350void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
351 struct net_device *dev);
352int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
353 u16 frame_type, const u8 *match_data,
354 int match_len);
355void cfg80211_mlme_unreg_wk(struct work_struct *wk);
356void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
357void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
358int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
359 struct wireless_dev *wdev,
360 struct cfg80211_mgmt_tx_params *params,
361 u64 *cookie);
362void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
363 const struct ieee80211_ht_cap *ht_capa_mask);
364void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
365 const struct ieee80211_vht_cap *vht_capa_mask);
366
367/* SME events */
368int cfg80211_connect(struct cfg80211_registered_device *rdev,
369 struct net_device *dev,
370 struct cfg80211_connect_params *connect,
371 struct cfg80211_cached_keys *connkeys,
372 const u8 *prev_bssid);
373void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
374 const u8 *req_ie, size_t req_ie_len,
375 const u8 *resp_ie, size_t resp_ie_len,
376 u16 status, bool wextev,
377 struct cfg80211_bss *bss);
378void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
379 size_t ie_len, u16 reason, bool from_ap);
380int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
381 struct net_device *dev, u16 reason,
382 bool wextev);
383void __cfg80211_roamed(struct wireless_dev *wdev,
384 struct cfg80211_bss *bss,
385 const u8 *req_ie, size_t req_ie_len,
386 const u8 *resp_ie, size_t resp_ie_len);
387int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
388 struct wireless_dev *wdev);
389
390/* SME implementation */
391void cfg80211_conn_work(struct work_struct *work);
392void cfg80211_sme_scan_done(struct net_device *dev);
393bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
394void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
395void cfg80211_sme_disassoc(struct wireless_dev *wdev);
396void cfg80211_sme_deauth(struct wireless_dev *wdev);
397void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
398void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
399
400/* internal helpers */
401bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
402int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
403 struct key_params *params, int key_idx,
404 bool pairwise, const u8 *mac_addr);
405void __cfg80211_scan_done(struct work_struct *wk);
406void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
407 bool send_message);
408void __cfg80211_sched_scan_results(struct work_struct *wk);
409int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
410 bool driver_initiated);
411void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
412int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
413 struct net_device *dev, enum nl80211_iftype ntype,
414 u32 *flags, struct vif_params *params);
415void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
416void cfg80211_process_wdev_events(struct wireless_dev *wdev);
417
418int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
419 struct wireless_dev *wdev,
420 enum nl80211_iftype iftype,
421 struct ieee80211_channel *chan,
422 enum cfg80211_chan_mode chanmode,
423 u8 radar_detect);
424
425/**
426 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
427 * @wiphy: the wiphy to validate against
428 * @chandef: the channel definition to check
429 *
430 * Checks if chandef is usable and we can/need start CAC on such channel.
431 *
432 * Return: Return true if all channels available and at least
433 * one channel require CAC (NL80211_DFS_USABLE)
434 */
435bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
436 const struct cfg80211_chan_def *chandef);
437
438void cfg80211_set_dfs_state(struct wiphy *wiphy,
439 const struct cfg80211_chan_def *chandef,
440 enum nl80211_dfs_state dfs_state);
441
442void cfg80211_dfs_channels_update_work(struct work_struct *work);
443
444unsigned int
445cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
446 const struct cfg80211_chan_def *chandef);
447
448static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
449{
450 unsigned long end = jiffies;
451
452 if (end >= start)
453 return jiffies_to_msecs(end - start);
454
455 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
456}
457
458void
459cfg80211_get_chan_state(struct wireless_dev *wdev,
460 struct ieee80211_channel **chan,
461 enum cfg80211_chan_mode *chanmode,
462 u8 *radar_detect);
463
464int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
465 struct cfg80211_chan_def *chandef);
466
467int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
468 const u8 *rates, unsigned int n_rates,
469 u32 *mask);
470
471int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
472 u32 beacon_int);
473
474void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
475 enum nl80211_iftype iftype, int num);
476
477void __cfg80211_leave(struct cfg80211_registered_device *rdev,
478 struct wireless_dev *wdev);
479void cfg80211_leave(struct cfg80211_registered_device *rdev,
480 struct wireless_dev *wdev);
481
482void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
483 struct wireless_dev *wdev);
484
485#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
486
487#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
488#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
489#else
490/*
491 * Trick to enable using it as a condition,
492 * and also not give a warning when it's
493 * not used that way.
494 */
495#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
496#endif
497
498#endif /* __NET_WIRELESS_CORE_H */