tjh.dev
Linux kernel mirror (for testing)
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linux
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 /* protected by RTNL only */
63 int num_running_ifaces;
64 int num_running_monitor_ifaces;
65
66 /* BSSes/scanning */
67 spinlock_t bss_lock;
68 struct list_head bss_list;
69 struct rb_root bss_tree;
70 u32 bss_generation;
71 struct cfg80211_scan_request *scan_req; /* protected by RTNL */
72 struct sk_buff *scan_msg;
73 struct cfg80211_sched_scan_request __rcu *sched_scan_req;
74 unsigned long suspend_at;
75 struct work_struct scan_done_wk;
76 struct work_struct sched_scan_results_wk;
77
78 struct genl_info *cur_cmd_info;
79
80 struct work_struct conn_work;
81 struct work_struct event_work;
82
83 struct delayed_work dfs_update_channels_wk;
84
85 /* netlink port which started critical protocol (0 means not started) */
86 u32 crit_proto_nlportid;
87
88 struct cfg80211_coalesce *coalesce;
89
90 spinlock_t destroy_list_lock;
91 struct list_head destroy_list;
92 struct work_struct destroy_work;
93
94 struct work_struct sched_scan_stop_wk;
95
96 /* must be last because of the way we do wiphy_priv(),
97 * and it should at least be aligned to NETDEV_ALIGN */
98 struct wiphy wiphy __aligned(NETDEV_ALIGN);
99};
100
101static inline
102struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
103{
104 BUG_ON(!wiphy);
105 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
106}
107
108static inline void
109cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
110{
111#ifdef CONFIG_PM
112 int i;
113
114 if (!rdev->wiphy.wowlan_config)
115 return;
116 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
117 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
118 kfree(rdev->wiphy.wowlan_config->patterns);
119 if (rdev->wiphy.wowlan_config->tcp &&
120 rdev->wiphy.wowlan_config->tcp->sock)
121 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
122 kfree(rdev->wiphy.wowlan_config->tcp);
123 kfree(rdev->wiphy.wowlan_config->nd_config);
124 kfree(rdev->wiphy.wowlan_config);
125#endif
126}
127
128extern struct workqueue_struct *cfg80211_wq;
129extern struct list_head cfg80211_rdev_list;
130extern int cfg80211_rdev_list_generation;
131
132struct cfg80211_internal_bss {
133 struct list_head list;
134 struct list_head hidden_list;
135 struct rb_node rbn;
136 unsigned long ts;
137 unsigned long refcount;
138 atomic_t hold;
139
140 /* must be last because of priv member */
141 struct cfg80211_bss pub;
142};
143
144static 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
149static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
150{
151 atomic_inc(&bss->hold);
152}
153
154static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
155{
156 int r = atomic_dec_return(&bss->hold);
157 WARN_ON(r < 0);
158}
159
160
161struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
162int get_wiphy_idx(struct wiphy *wiphy);
163
164struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
165
166int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
167 struct net *net);
168
169static inline void wdev_lock(struct wireless_dev *wdev)
170 __acquires(wdev)
171{
172 mutex_lock(&wdev->mtx);
173 __acquire(wdev->mtx);
174}
175
176static inline void wdev_unlock(struct wireless_dev *wdev)
177 __releases(wdev)
178{
179 __release(wdev->mtx);
180 mutex_unlock(&wdev->mtx);
181}
182
183#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
184
185static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
186{
187 ASSERT_RTNL();
188
189 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
190 rdev->num_running_ifaces > 0;
191}
192
193enum cfg80211_event_type {
194 EVENT_CONNECT_RESULT,
195 EVENT_ROAMED,
196 EVENT_DISCONNECTED,
197 EVENT_IBSS_JOINED,
198 EVENT_STOPPED,
199};
200
201struct cfg80211_event {
202 struct list_head list;
203 enum cfg80211_event_type type;
204
205 union {
206 struct {
207 u8 bssid[ETH_ALEN];
208 const u8 *req_ie;
209 const u8 *resp_ie;
210 size_t req_ie_len;
211 size_t resp_ie_len;
212 u16 status;
213 } cr;
214 struct {
215 const u8 *req_ie;
216 const u8 *resp_ie;
217 size_t req_ie_len;
218 size_t resp_ie_len;
219 struct cfg80211_bss *bss;
220 } rm;
221 struct {
222 const u8 *ie;
223 size_t ie_len;
224 u16 reason;
225 bool locally_generated;
226 } dc;
227 struct {
228 u8 bssid[ETH_ALEN];
229 struct ieee80211_channel *channel;
230 } ij;
231 };
232};
233
234struct cfg80211_cached_keys {
235 struct key_params params[6];
236 u8 data[6][WLAN_MAX_KEY_LEN];
237 int def, defmgmt;
238};
239
240enum cfg80211_chan_mode {
241 CHAN_MODE_UNDEFINED,
242 CHAN_MODE_SHARED,
243 CHAN_MODE_EXCLUSIVE,
244};
245
246struct cfg80211_beacon_registration {
247 struct list_head list;
248 u32 nlportid;
249};
250
251struct cfg80211_iface_destroy {
252 struct list_head list;
253 u32 nlportid;
254};
255
256void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
257
258/* free object */
259void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
260
261int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
262 char *newname);
263
264void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
265
266void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
267void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
268 unsigned long age_secs);
269
270/* IBSS */
271int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
272 struct net_device *dev,
273 struct cfg80211_ibss_params *params,
274 struct cfg80211_cached_keys *connkeys);
275void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
276int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
277 struct net_device *dev, bool nowext);
278int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
279 struct net_device *dev, bool nowext);
280void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
281 struct ieee80211_channel *channel);
282int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
283 struct wireless_dev *wdev);
284
285/* mesh */
286extern const struct mesh_config default_mesh_config;
287extern const struct mesh_setup default_mesh_setup;
288int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
289 struct net_device *dev,
290 struct mesh_setup *setup,
291 const struct mesh_config *conf);
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_leave_mesh(struct cfg80211_registered_device *rdev,
297 struct net_device *dev);
298int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
299 struct net_device *dev);
300int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
301 struct wireless_dev *wdev,
302 struct cfg80211_chan_def *chandef);
303
304/* OCB */
305int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
306 struct net_device *dev,
307 struct ocb_setup *setup);
308int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
309 struct net_device *dev,
310 struct ocb_setup *setup);
311int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
312 struct net_device *dev);
313int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
314 struct net_device *dev);
315
316/* AP */
317int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
318 struct net_device *dev, bool notify);
319int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
320 struct net_device *dev, bool notify);
321
322/* MLME */
323int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
324 struct net_device *dev,
325 struct ieee80211_channel *chan,
326 enum nl80211_auth_type auth_type,
327 const u8 *bssid,
328 const u8 *ssid, int ssid_len,
329 const u8 *ie, int ie_len,
330 const u8 *key, int key_len, int key_idx,
331 const u8 *sae_data, int sae_data_len);
332int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
333 struct net_device *dev,
334 struct ieee80211_channel *chan,
335 const u8 *bssid,
336 const u8 *ssid, int ssid_len,
337 struct cfg80211_assoc_request *req);
338int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
339 struct net_device *dev, const u8 *bssid,
340 const u8 *ie, int ie_len, u16 reason,
341 bool local_state_change);
342int cfg80211_mlme_disassoc(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);
346void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
347 struct net_device *dev);
348int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
349 u16 frame_type, const u8 *match_data,
350 int match_len);
351void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
352void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
353int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
354 struct wireless_dev *wdev,
355 struct cfg80211_mgmt_tx_params *params,
356 u64 *cookie);
357void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
358 const struct ieee80211_ht_cap *ht_capa_mask);
359void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
360 const struct ieee80211_vht_cap *vht_capa_mask);
361
362/* SME events */
363int cfg80211_connect(struct cfg80211_registered_device *rdev,
364 struct net_device *dev,
365 struct cfg80211_connect_params *connect,
366 struct cfg80211_cached_keys *connkeys,
367 const u8 *prev_bssid);
368void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
369 const u8 *req_ie, size_t req_ie_len,
370 const u8 *resp_ie, size_t resp_ie_len,
371 u16 status, bool wextev,
372 struct cfg80211_bss *bss);
373void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
374 size_t ie_len, u16 reason, bool from_ap);
375int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
376 struct net_device *dev, u16 reason,
377 bool wextev);
378void __cfg80211_roamed(struct wireless_dev *wdev,
379 struct cfg80211_bss *bss,
380 const u8 *req_ie, size_t req_ie_len,
381 const u8 *resp_ie, size_t resp_ie_len);
382int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
383 struct wireless_dev *wdev);
384
385/* SME implementation */
386void cfg80211_conn_work(struct work_struct *work);
387void cfg80211_sme_scan_done(struct net_device *dev);
388bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
389void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
390void cfg80211_sme_disassoc(struct wireless_dev *wdev);
391void cfg80211_sme_deauth(struct wireless_dev *wdev);
392void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
393void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
394
395/* internal helpers */
396bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
397int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
398 struct key_params *params, int key_idx,
399 bool pairwise, const u8 *mac_addr);
400void __cfg80211_scan_done(struct work_struct *wk);
401void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
402 bool send_message);
403void __cfg80211_sched_scan_results(struct work_struct *wk);
404int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
405 bool driver_initiated);
406void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
407int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
408 struct net_device *dev, enum nl80211_iftype ntype,
409 u32 *flags, struct vif_params *params);
410void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
411void cfg80211_process_wdev_events(struct wireless_dev *wdev);
412
413int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
414 struct wireless_dev *wdev,
415 enum nl80211_iftype iftype,
416 struct ieee80211_channel *chan,
417 enum cfg80211_chan_mode chanmode,
418 u8 radar_detect);
419
420/**
421 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
422 * @wiphy: the wiphy to validate against
423 * @chandef: the channel definition to check
424 *
425 * Checks if chandef is usable and we can/need start CAC on such channel.
426 *
427 * Return: Return true if all channels available and at least
428 * one channel require CAC (NL80211_DFS_USABLE)
429 */
430bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
431 const struct cfg80211_chan_def *chandef);
432
433void cfg80211_set_dfs_state(struct wiphy *wiphy,
434 const struct cfg80211_chan_def *chandef,
435 enum nl80211_dfs_state dfs_state);
436
437void cfg80211_dfs_channels_update_work(struct work_struct *work);
438
439unsigned int
440cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
441 const struct cfg80211_chan_def *chandef);
442
443static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
444{
445 unsigned long end = jiffies;
446
447 if (end >= start)
448 return jiffies_to_msecs(end - start);
449
450 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
451}
452
453void
454cfg80211_get_chan_state(struct wireless_dev *wdev,
455 struct ieee80211_channel **chan,
456 enum cfg80211_chan_mode *chanmode,
457 u8 *radar_detect);
458
459int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
460 struct cfg80211_chan_def *chandef);
461
462int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
463 const u8 *rates, unsigned int n_rates,
464 u32 *mask);
465
466int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
467 u32 beacon_int);
468
469void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
470 enum nl80211_iftype iftype, int num);
471
472void __cfg80211_leave(struct cfg80211_registered_device *rdev,
473 struct wireless_dev *wdev);
474void cfg80211_leave(struct cfg80211_registered_device *rdev,
475 struct wireless_dev *wdev);
476
477void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
478 struct wireless_dev *wdev);
479
480#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
481
482#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
483#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
484#else
485/*
486 * Trick to enable using it as a condition,
487 * and also not give a warning when it's
488 * not used that way.
489 */
490#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
491#endif
492
493#endif /* __NET_WIRELESS_CORE_H */