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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 /* If a Country IE has been received this tells us the environment
40 * which its telling us its in. This defaults to ENVIRON_ANY */
41 enum environment_cap env;
42
43 /* wiphy index, internal only */
44 int wiphy_idx;
45
46 /* associated wireless interfaces, protected by rtnl or RCU */
47 struct list_head wdev_list;
48 int devlist_generation, wdev_id;
49 int opencount; /* also protected by devlist_mtx */
50 wait_queue_head_t dev_wait;
51
52 struct list_head beacon_registrations;
53 spinlock_t beacon_registrations_lock;
54
55 /* protected by RTNL only */
56 int num_running_ifaces;
57 int num_running_monitor_ifaces;
58
59 /* BSSes/scanning */
60 spinlock_t bss_lock;
61 struct list_head bss_list;
62 struct rb_root bss_tree;
63 u32 bss_generation;
64 struct cfg80211_scan_request *scan_req; /* protected by RTNL */
65 struct cfg80211_sched_scan_request *sched_scan_req;
66 unsigned long suspend_at;
67 struct work_struct scan_done_wk;
68 struct work_struct sched_scan_results_wk;
69
70#ifdef CONFIG_NL80211_TESTMODE
71 struct genl_info *testmode_info;
72#endif
73
74 struct work_struct conn_work;
75 struct work_struct event_work;
76
77 struct delayed_work dfs_update_channels_wk;
78
79 /* netlink port which started critical protocol (0 means not started) */
80 u32 crit_proto_nlportid;
81
82 struct cfg80211_coalesce *coalesce;
83
84 /* must be last because of the way we do wiphy_priv(),
85 * and it should at least be aligned to NETDEV_ALIGN */
86 struct wiphy wiphy __aligned(NETDEV_ALIGN);
87};
88
89static inline
90struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
91{
92 BUG_ON(!wiphy);
93 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
94}
95
96static inline void
97cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
98{
99#ifdef CONFIG_PM
100 int i;
101
102 if (!rdev->wiphy.wowlan_config)
103 return;
104 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
105 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
106 kfree(rdev->wiphy.wowlan_config->patterns);
107 if (rdev->wiphy.wowlan_config->tcp &&
108 rdev->wiphy.wowlan_config->tcp->sock)
109 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
110 kfree(rdev->wiphy.wowlan_config->tcp);
111 kfree(rdev->wiphy.wowlan_config);
112#endif
113}
114
115extern struct workqueue_struct *cfg80211_wq;
116extern struct list_head cfg80211_rdev_list;
117extern int cfg80211_rdev_list_generation;
118
119struct cfg80211_internal_bss {
120 struct list_head list;
121 struct list_head hidden_list;
122 struct rb_node rbn;
123 unsigned long ts;
124 unsigned long refcount;
125 atomic_t hold;
126
127 /* must be last because of priv member */
128 struct cfg80211_bss pub;
129};
130
131static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
132{
133 return container_of(pub, struct cfg80211_internal_bss, pub);
134}
135
136static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
137{
138 atomic_inc(&bss->hold);
139}
140
141static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
142{
143 int r = atomic_dec_return(&bss->hold);
144 WARN_ON(r < 0);
145}
146
147
148struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
149int get_wiphy_idx(struct wiphy *wiphy);
150
151struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
152
153int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
154 struct net *net);
155
156static inline void wdev_lock(struct wireless_dev *wdev)
157 __acquires(wdev)
158{
159 mutex_lock(&wdev->mtx);
160 __acquire(wdev->mtx);
161}
162
163static inline void wdev_unlock(struct wireless_dev *wdev)
164 __releases(wdev)
165{
166 __release(wdev->mtx);
167 mutex_unlock(&wdev->mtx);
168}
169
170#define ASSERT_RDEV_LOCK(rdev) ASSERT_RTNL()
171#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
172
173static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
174{
175 ASSERT_RTNL();
176
177 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
178 rdev->num_running_ifaces > 0;
179}
180
181enum cfg80211_event_type {
182 EVENT_CONNECT_RESULT,
183 EVENT_ROAMED,
184 EVENT_DISCONNECTED,
185 EVENT_IBSS_JOINED,
186};
187
188struct cfg80211_event {
189 struct list_head list;
190 enum cfg80211_event_type type;
191
192 union {
193 struct {
194 u8 bssid[ETH_ALEN];
195 const u8 *req_ie;
196 const u8 *resp_ie;
197 size_t req_ie_len;
198 size_t resp_ie_len;
199 u16 status;
200 } cr;
201 struct {
202 const u8 *req_ie;
203 const u8 *resp_ie;
204 size_t req_ie_len;
205 size_t resp_ie_len;
206 struct cfg80211_bss *bss;
207 } rm;
208 struct {
209 const u8 *ie;
210 size_t ie_len;
211 u16 reason;
212 } dc;
213 struct {
214 u8 bssid[ETH_ALEN];
215 } ij;
216 };
217};
218
219struct cfg80211_cached_keys {
220 struct key_params params[6];
221 u8 data[6][WLAN_MAX_KEY_LEN];
222 int def, defmgmt;
223};
224
225enum cfg80211_chan_mode {
226 CHAN_MODE_UNDEFINED,
227 CHAN_MODE_SHARED,
228 CHAN_MODE_EXCLUSIVE,
229};
230
231struct cfg80211_beacon_registration {
232 struct list_head list;
233 u32 nlportid;
234};
235
236/* free object */
237void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
238
239int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
240 char *newname);
241
242void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
243
244void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
245void cfg80211_bss_age(struct cfg80211_registered_device *dev,
246 unsigned long age_secs);
247
248/* IBSS */
249int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
250 struct net_device *dev,
251 struct cfg80211_ibss_params *params,
252 struct cfg80211_cached_keys *connkeys);
253int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
254 struct net_device *dev,
255 struct cfg80211_ibss_params *params,
256 struct cfg80211_cached_keys *connkeys);
257void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
258int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
259 struct net_device *dev, bool nowext);
260int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
261 struct net_device *dev, bool nowext);
262void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
263int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
264 struct wireless_dev *wdev);
265
266/* mesh */
267extern const struct mesh_config default_mesh_config;
268extern const struct mesh_setup default_mesh_setup;
269int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
270 struct net_device *dev,
271 struct mesh_setup *setup,
272 const struct mesh_config *conf);
273int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
274 struct net_device *dev,
275 struct mesh_setup *setup,
276 const struct mesh_config *conf);
277int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
278 struct net_device *dev);
279int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
280 struct wireless_dev *wdev,
281 struct cfg80211_chan_def *chandef);
282
283/* AP */
284int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
285 struct net_device *dev);
286
287/* MLME */
288int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
289 struct net_device *dev,
290 struct ieee80211_channel *chan,
291 enum nl80211_auth_type auth_type,
292 const u8 *bssid,
293 const u8 *ssid, int ssid_len,
294 const u8 *ie, int ie_len,
295 const u8 *key, int key_len, int key_idx,
296 const u8 *sae_data, int sae_data_len);
297int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
298 struct net_device *dev,
299 struct ieee80211_channel *chan,
300 const u8 *bssid,
301 const u8 *ssid, int ssid_len,
302 struct cfg80211_assoc_request *req);
303int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
304 struct net_device *dev, const u8 *bssid,
305 const u8 *ie, int ie_len, u16 reason,
306 bool local_state_change);
307int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
308 struct net_device *dev, const u8 *bssid,
309 const u8 *ie, int ie_len, u16 reason,
310 bool local_state_change);
311void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
312 struct net_device *dev);
313int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
314 u16 frame_type, const u8 *match_data,
315 int match_len);
316void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
317void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
318int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
319 struct wireless_dev *wdev,
320 struct ieee80211_channel *chan, bool offchan,
321 unsigned int wait, const u8 *buf, size_t len,
322 bool no_cck, bool dont_wait_for_ack, u64 *cookie);
323void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
324 const struct ieee80211_ht_cap *ht_capa_mask);
325void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
326 const struct ieee80211_vht_cap *vht_capa_mask);
327
328/* SME events */
329int cfg80211_connect(struct cfg80211_registered_device *rdev,
330 struct net_device *dev,
331 struct cfg80211_connect_params *connect,
332 struct cfg80211_cached_keys *connkeys,
333 const u8 *prev_bssid);
334void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
335 const u8 *req_ie, size_t req_ie_len,
336 const u8 *resp_ie, size_t resp_ie_len,
337 u16 status, bool wextev,
338 struct cfg80211_bss *bss);
339void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
340 size_t ie_len, u16 reason, bool from_ap);
341int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
342 struct net_device *dev, u16 reason,
343 bool wextev);
344void __cfg80211_roamed(struct wireless_dev *wdev,
345 struct cfg80211_bss *bss,
346 const u8 *req_ie, size_t req_ie_len,
347 const u8 *resp_ie, size_t resp_ie_len);
348int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
349 struct wireless_dev *wdev);
350
351/* SME implementation */
352void cfg80211_conn_work(struct work_struct *work);
353void cfg80211_sme_scan_done(struct net_device *dev);
354bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
355void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
356void cfg80211_sme_disassoc(struct wireless_dev *wdev);
357void cfg80211_sme_deauth(struct wireless_dev *wdev);
358void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
359void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
360
361/* internal helpers */
362bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
363int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
364 struct key_params *params, int key_idx,
365 bool pairwise, const u8 *mac_addr);
366void __cfg80211_scan_done(struct work_struct *wk);
367void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
368void __cfg80211_sched_scan_results(struct work_struct *wk);
369int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
370 bool driver_initiated);
371void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
372int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
373 struct net_device *dev, enum nl80211_iftype ntype,
374 u32 *flags, struct vif_params *params);
375void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
376void cfg80211_process_wdev_events(struct wireless_dev *wdev);
377
378int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
379 struct wireless_dev *wdev,
380 enum nl80211_iftype iftype,
381 struct ieee80211_channel *chan,
382 enum cfg80211_chan_mode chanmode,
383 u8 radar_detect);
384
385void cfg80211_set_dfs_state(struct wiphy *wiphy,
386 const struct cfg80211_chan_def *chandef,
387 enum nl80211_dfs_state dfs_state);
388
389void cfg80211_dfs_channels_update_work(struct work_struct *work);
390
391
392static inline int
393cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
394 struct wireless_dev *wdev,
395 enum nl80211_iftype iftype)
396{
397 return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
398 CHAN_MODE_UNDEFINED, 0);
399}
400
401static inline int
402cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
403 enum nl80211_iftype iftype)
404{
405 if (rfkill_blocked(rdev->rfkill))
406 return -ERFKILL;
407
408 return cfg80211_can_change_interface(rdev, NULL, iftype);
409}
410
411static inline int
412cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
413 struct wireless_dev *wdev,
414 struct ieee80211_channel *chan,
415 enum cfg80211_chan_mode chanmode)
416{
417 return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
418 chan, chanmode, 0);
419}
420
421static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
422{
423 unsigned long end = jiffies;
424
425 if (end >= start)
426 return jiffies_to_msecs(end - start);
427
428 return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
429}
430
431void
432cfg80211_get_chan_state(struct wireless_dev *wdev,
433 struct ieee80211_channel **chan,
434 enum cfg80211_chan_mode *chanmode);
435
436int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
437 struct cfg80211_chan_def *chandef);
438
439int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
440 const u8 *rates, unsigned int n_rates,
441 u32 *mask);
442
443int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
444 u32 beacon_int);
445
446void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
447 enum nl80211_iftype iftype, int num);
448
449void cfg80211_leave(struct cfg80211_registered_device *rdev,
450 struct wireless_dev *wdev);
451
452void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
453 struct wireless_dev *wdev);
454
455#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
456
457#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
458#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
459#else
460/*
461 * Trick to enable using it as a condition,
462 * and also not give a warning when it's
463 * not used that way.
464 */
465#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
466#endif
467
468#endif /* __NET_WIRELESS_CORE_H */