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