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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 /* protected by RTNL */
54 int devlist_generation, wdev_id;
55 int opencount;
56 wait_queue_head_t dev_wait;
57
58 struct list_head beacon_registrations;
59 spinlock_t beacon_registrations_lock;
60
61 struct list_head mlme_unreg;
62 spinlock_t mlme_unreg_lock;
63 struct work_struct mlme_unreg_wk;
64
65 /* protected by RTNL only */
66 int num_running_ifaces;
67 int num_running_monitor_ifaces;
68
69 /* BSSes/scanning */
70 spinlock_t bss_lock;
71 struct list_head bss_list;
72 struct rb_root bss_tree;
73 u32 bss_generation;
74 struct cfg80211_scan_request *scan_req; /* protected by RTNL */
75 struct sk_buff *scan_msg;
76 struct cfg80211_sched_scan_request __rcu *sched_scan_req;
77 unsigned long suspend_at;
78 struct work_struct scan_done_wk;
79 struct work_struct sched_scan_results_wk;
80
81 struct genl_info *cur_cmd_info;
82
83 struct work_struct conn_work;
84 struct work_struct event_work;
85
86 struct delayed_work dfs_update_channels_wk;
87
88 /* netlink port which started critical protocol (0 means not started) */
89 u32 crit_proto_nlportid;
90
91 struct cfg80211_coalesce *coalesce;
92
93 spinlock_t destroy_list_lock;
94 struct list_head destroy_list;
95 struct work_struct destroy_work;
96
97 struct work_struct sched_scan_stop_wk;
98
99 /* must be last because of the way we do wiphy_priv(),
100 * and it should at least be aligned to NETDEV_ALIGN */
101 struct wiphy wiphy __aligned(NETDEV_ALIGN);
102};
103
104static inline
105struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
106{
107 BUG_ON(!wiphy);
108 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
109}
110
111static inline void
112cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
113{
114#ifdef CONFIG_PM
115 int i;
116
117 if (!rdev->wiphy.wowlan_config)
118 return;
119 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
120 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
121 kfree(rdev->wiphy.wowlan_config->patterns);
122 if (rdev->wiphy.wowlan_config->tcp &&
123 rdev->wiphy.wowlan_config->tcp->sock)
124 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
125 kfree(rdev->wiphy.wowlan_config->tcp);
126 kfree(rdev->wiphy.wowlan_config->nd_config);
127 kfree(rdev->wiphy.wowlan_config);
128#endif
129}
130
131extern struct workqueue_struct *cfg80211_wq;
132extern struct list_head cfg80211_rdev_list;
133extern int cfg80211_rdev_list_generation;
134
135struct cfg80211_internal_bss {
136 struct list_head list;
137 struct list_head hidden_list;
138 struct rb_node rbn;
139 u64 ts_boottime;
140 unsigned long ts;
141 unsigned long refcount;
142 atomic_t hold;
143
144 /* time at the start of the reception of the first octet of the
145 * timestamp field of the last beacon/probe received for this BSS.
146 * The time is the TSF of the BSS specified by %parent_bssid.
147 */
148 u64 parent_tsf;
149
150 /* the BSS according to which %parent_tsf is set. This is set to
151 * the BSS that the interface that requested the scan was connected to
152 * when the beacon/probe was received.
153 */
154 u8 parent_bssid[ETH_ALEN] __aligned(2);
155
156 /* must be last because of priv member */
157 struct cfg80211_bss pub;
158};
159
160static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
161{
162 return container_of(pub, struct cfg80211_internal_bss, pub);
163}
164
165static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
166{
167 atomic_inc(&bss->hold);
168}
169
170static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
171{
172 int r = atomic_dec_return(&bss->hold);
173 WARN_ON(r < 0);
174}
175
176
177struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
178int get_wiphy_idx(struct wiphy *wiphy);
179
180struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
181
182int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
183 struct net *net);
184
185static inline void wdev_lock(struct wireless_dev *wdev)
186 __acquires(wdev)
187{
188 mutex_lock(&wdev->mtx);
189 __acquire(wdev->mtx);
190}
191
192static inline void wdev_unlock(struct wireless_dev *wdev)
193 __releases(wdev)
194{
195 __release(wdev->mtx);
196 mutex_unlock(&wdev->mtx);
197}
198
199#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
200
201static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
202{
203 ASSERT_RTNL();
204
205 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
206 rdev->num_running_ifaces > 0;
207}
208
209enum cfg80211_event_type {
210 EVENT_CONNECT_RESULT,
211 EVENT_ROAMED,
212 EVENT_DISCONNECTED,
213 EVENT_IBSS_JOINED,
214 EVENT_STOPPED,
215};
216
217struct cfg80211_event {
218 struct list_head list;
219 enum cfg80211_event_type type;
220
221 union {
222 struct {
223 u8 bssid[ETH_ALEN];
224 const u8 *req_ie;
225 const u8 *resp_ie;
226 size_t req_ie_len;
227 size_t resp_ie_len;
228 struct cfg80211_bss *bss;
229 int status; /* -1 = failed; 0..65535 = status code */
230 } cr;
231 struct {
232 const u8 *req_ie;
233 const u8 *resp_ie;
234 size_t req_ie_len;
235 size_t resp_ie_len;
236 struct cfg80211_bss *bss;
237 } rm;
238 struct {
239 const u8 *ie;
240 size_t ie_len;
241 u16 reason;
242 bool locally_generated;
243 } dc;
244 struct {
245 u8 bssid[ETH_ALEN];
246 struct ieee80211_channel *channel;
247 } ij;
248 };
249};
250
251struct cfg80211_cached_keys {
252 struct key_params params[CFG80211_MAX_WEP_KEYS];
253 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104];
254 int def;
255};
256
257enum cfg80211_chan_mode {
258 CHAN_MODE_UNDEFINED,
259 CHAN_MODE_SHARED,
260 CHAN_MODE_EXCLUSIVE,
261};
262
263struct cfg80211_beacon_registration {
264 struct list_head list;
265 u32 nlportid;
266};
267
268struct cfg80211_iface_destroy {
269 struct list_head list;
270 u32 nlportid;
271};
272
273void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
274
275/* free object */
276void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
277
278int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
279 char *newname);
280
281void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
282
283void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
284void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
285 unsigned long age_secs);
286
287/* IBSS */
288int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
289 struct net_device *dev,
290 struct cfg80211_ibss_params *params,
291 struct cfg80211_cached_keys *connkeys);
292void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
293int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
294 struct net_device *dev, bool nowext);
295int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
296 struct net_device *dev, bool nowext);
297void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
298 struct ieee80211_channel *channel);
299int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
300 struct wireless_dev *wdev);
301
302/* mesh */
303extern const struct mesh_config default_mesh_config;
304extern const struct mesh_setup default_mesh_setup;
305int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
306 struct net_device *dev,
307 struct mesh_setup *setup,
308 const struct mesh_config *conf);
309int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
310 struct net_device *dev,
311 struct mesh_setup *setup,
312 const struct mesh_config *conf);
313int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
314 struct net_device *dev);
315int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
316 struct net_device *dev);
317int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
318 struct wireless_dev *wdev,
319 struct cfg80211_chan_def *chandef);
320
321/* OCB */
322int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
323 struct net_device *dev,
324 struct ocb_setup *setup);
325int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
326 struct net_device *dev,
327 struct ocb_setup *setup);
328int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
329 struct net_device *dev);
330int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
331 struct net_device *dev);
332
333/* AP */
334int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
335 struct net_device *dev, bool notify);
336int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
337 struct net_device *dev, bool notify);
338
339/* MLME */
340int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
341 struct net_device *dev,
342 struct ieee80211_channel *chan,
343 enum nl80211_auth_type auth_type,
344 const u8 *bssid,
345 const u8 *ssid, int ssid_len,
346 const u8 *ie, int ie_len,
347 const u8 *key, int key_len, int key_idx,
348 const u8 *sae_data, int sae_data_len);
349int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
350 struct net_device *dev,
351 struct ieee80211_channel *chan,
352 const u8 *bssid,
353 const u8 *ssid, int ssid_len,
354 struct cfg80211_assoc_request *req);
355int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
356 struct net_device *dev, const u8 *bssid,
357 const u8 *ie, int ie_len, u16 reason,
358 bool local_state_change);
359int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
360 struct net_device *dev, const u8 *bssid,
361 const u8 *ie, int ie_len, u16 reason,
362 bool local_state_change);
363void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
364 struct net_device *dev);
365int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
366 u16 frame_type, const u8 *match_data,
367 int match_len);
368void cfg80211_mlme_unreg_wk(struct work_struct *wk);
369void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
370void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
371int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
372 struct wireless_dev *wdev,
373 struct cfg80211_mgmt_tx_params *params,
374 u64 *cookie);
375void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
376 const struct ieee80211_ht_cap *ht_capa_mask);
377void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
378 const struct ieee80211_vht_cap *vht_capa_mask);
379
380/* SME events */
381int cfg80211_connect(struct cfg80211_registered_device *rdev,
382 struct net_device *dev,
383 struct cfg80211_connect_params *connect,
384 struct cfg80211_cached_keys *connkeys,
385 const u8 *prev_bssid);
386void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
387 const u8 *req_ie, size_t req_ie_len,
388 const u8 *resp_ie, size_t resp_ie_len,
389 int status, bool wextev,
390 struct cfg80211_bss *bss);
391void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
392 size_t ie_len, u16 reason, bool from_ap);
393int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
394 struct net_device *dev, u16 reason,
395 bool wextev);
396void __cfg80211_roamed(struct wireless_dev *wdev,
397 struct cfg80211_bss *bss,
398 const u8 *req_ie, size_t req_ie_len,
399 const u8 *resp_ie, size_t resp_ie_len);
400int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
401 struct wireless_dev *wdev);
402
403/* SME implementation */
404void cfg80211_conn_work(struct work_struct *work);
405void cfg80211_sme_scan_done(struct net_device *dev);
406bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
407void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
408void cfg80211_sme_disassoc(struct wireless_dev *wdev);
409void cfg80211_sme_deauth(struct wireless_dev *wdev);
410void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
411void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
412
413/* internal helpers */
414bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
415int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
416 struct key_params *params, int key_idx,
417 bool pairwise, const u8 *mac_addr);
418void __cfg80211_scan_done(struct work_struct *wk);
419void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
420 bool send_message);
421void __cfg80211_sched_scan_results(struct work_struct *wk);
422int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
423 bool driver_initiated);
424void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
425int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
426 struct net_device *dev, enum nl80211_iftype ntype,
427 u32 *flags, struct vif_params *params);
428void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
429void cfg80211_process_wdev_events(struct wireless_dev *wdev);
430
431/**
432 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
433 * @wiphy: the wiphy to validate against
434 * @chandef: the channel definition to check
435 *
436 * Checks if chandef is usable and we can/need start CAC on such channel.
437 *
438 * Return: Return true if all channels available and at least
439 * one channel require CAC (NL80211_DFS_USABLE)
440 */
441bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
442 const struct cfg80211_chan_def *chandef);
443
444void cfg80211_set_dfs_state(struct wiphy *wiphy,
445 const struct cfg80211_chan_def *chandef,
446 enum nl80211_dfs_state dfs_state);
447
448void cfg80211_dfs_channels_update_work(struct work_struct *work);
449
450unsigned int
451cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
452 const struct cfg80211_chan_def *chandef);
453
454static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
455{
456 unsigned long end = jiffies;
457
458 if (end >= start)
459 return jiffies_to_msecs(end - start);
460
461 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
462}
463
464void
465cfg80211_get_chan_state(struct wireless_dev *wdev,
466 struct ieee80211_channel **chan,
467 enum cfg80211_chan_mode *chanmode,
468 u8 *radar_detect);
469
470int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
471 struct cfg80211_chan_def *chandef);
472
473int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
474 const u8 *rates, unsigned int n_rates,
475 u32 *mask);
476
477int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
478 u32 beacon_int);
479
480void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
481 enum nl80211_iftype iftype, int num);
482
483void __cfg80211_leave(struct cfg80211_registered_device *rdev,
484 struct wireless_dev *wdev);
485void cfg80211_leave(struct cfg80211_registered_device *rdev,
486 struct wireless_dev *wdev);
487
488void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
489 struct wireless_dev *wdev);
490
491void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
492 struct wireless_dev *wdev);
493
494#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
495
496#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
497#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
498#else
499/*
500 * Trick to enable using it as a condition,
501 * and also not give a warning when it's
502 * not used that way.
503 */
504#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
505#endif
506
507#endif /* __NET_WIRELESS_CORE_H */