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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 /* 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 /* must be last because of the way we do wiphy_priv(),
83 * and it should at least be aligned to NETDEV_ALIGN */
84 struct wiphy wiphy __aligned(NETDEV_ALIGN);
85};
86
87static inline
88struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
89{
90 BUG_ON(!wiphy);
91 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
92}
93
94static inline void
95cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
96{
97#ifdef CONFIG_PM
98 int i;
99
100 if (!rdev->wiphy.wowlan_config)
101 return;
102 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
103 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
104 kfree(rdev->wiphy.wowlan_config->patterns);
105 if (rdev->wiphy.wowlan_config->tcp &&
106 rdev->wiphy.wowlan_config->tcp->sock)
107 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
108 kfree(rdev->wiphy.wowlan_config->tcp);
109 kfree(rdev->wiphy.wowlan_config);
110#endif
111}
112
113extern struct workqueue_struct *cfg80211_wq;
114extern struct list_head cfg80211_rdev_list;
115extern int cfg80211_rdev_list_generation;
116
117struct cfg80211_internal_bss {
118 struct list_head list;
119 struct list_head hidden_list;
120 struct rb_node rbn;
121 unsigned long ts;
122 unsigned long refcount;
123 atomic_t hold;
124
125 /* must be last because of priv member */
126 struct cfg80211_bss pub;
127};
128
129static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
130{
131 return container_of(pub, struct cfg80211_internal_bss, pub);
132}
133
134static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
135{
136 atomic_inc(&bss->hold);
137}
138
139static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
140{
141 int r = atomic_dec_return(&bss->hold);
142 WARN_ON(r < 0);
143}
144
145
146struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
147int get_wiphy_idx(struct wiphy *wiphy);
148
149struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
150
151int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
152 struct net *net);
153
154static inline void wdev_lock(struct wireless_dev *wdev)
155 __acquires(wdev)
156{
157 mutex_lock(&wdev->mtx);
158 __acquire(wdev->mtx);
159}
160
161static inline void wdev_unlock(struct wireless_dev *wdev)
162 __releases(wdev)
163{
164 __release(wdev->mtx);
165 mutex_unlock(&wdev->mtx);
166}
167
168#define ASSERT_RDEV_LOCK(rdev) ASSERT_RTNL()
169#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
170
171static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
172{
173 ASSERT_RTNL();
174
175 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
176 rdev->num_running_ifaces > 0;
177}
178
179enum cfg80211_event_type {
180 EVENT_CONNECT_RESULT,
181 EVENT_ROAMED,
182 EVENT_DISCONNECTED,
183 EVENT_IBSS_JOINED,
184};
185
186struct cfg80211_event {
187 struct list_head list;
188 enum cfg80211_event_type type;
189
190 union {
191 struct {
192 u8 bssid[ETH_ALEN];
193 const u8 *req_ie;
194 const u8 *resp_ie;
195 size_t req_ie_len;
196 size_t resp_ie_len;
197 u16 status;
198 } cr;
199 struct {
200 const u8 *req_ie;
201 const u8 *resp_ie;
202 size_t req_ie_len;
203 size_t resp_ie_len;
204 struct cfg80211_bss *bss;
205 } rm;
206 struct {
207 const u8 *ie;
208 size_t ie_len;
209 u16 reason;
210 } dc;
211 struct {
212 u8 bssid[ETH_ALEN];
213 } ij;
214 };
215};
216
217struct cfg80211_cached_keys {
218 struct key_params params[6];
219 u8 data[6][WLAN_MAX_KEY_LEN];
220 int def, defmgmt;
221};
222
223enum cfg80211_chan_mode {
224 CHAN_MODE_UNDEFINED,
225 CHAN_MODE_SHARED,
226 CHAN_MODE_EXCLUSIVE,
227};
228
229struct cfg80211_beacon_registration {
230 struct list_head list;
231 u32 nlportid;
232};
233
234/* free object */
235extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
236
237extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
238 char *newname);
239
240void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
241
242void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
243void cfg80211_bss_age(struct cfg80211_registered_device *dev,
244 unsigned long age_secs);
245
246/* IBSS */
247int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
248 struct net_device *dev,
249 struct cfg80211_ibss_params *params,
250 struct cfg80211_cached_keys *connkeys);
251int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
252 struct net_device *dev,
253 struct cfg80211_ibss_params *params,
254 struct cfg80211_cached_keys *connkeys);
255void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
256int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
257 struct net_device *dev, bool nowext);
258int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
259 struct net_device *dev, bool nowext);
260void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
261int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
262 struct wireless_dev *wdev);
263
264/* mesh */
265extern const struct mesh_config default_mesh_config;
266extern const struct mesh_setup default_mesh_setup;
267int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
268 struct net_device *dev,
269 struct mesh_setup *setup,
270 const struct mesh_config *conf);
271int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
272 struct net_device *dev,
273 struct mesh_setup *setup,
274 const struct mesh_config *conf);
275int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
276 struct net_device *dev);
277int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
278 struct wireless_dev *wdev,
279 struct cfg80211_chan_def *chandef);
280
281/* AP */
282int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
283 struct net_device *dev);
284
285/* MLME */
286int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
287 struct net_device *dev,
288 struct ieee80211_channel *chan,
289 enum nl80211_auth_type auth_type,
290 const u8 *bssid,
291 const u8 *ssid, int ssid_len,
292 const u8 *ie, int ie_len,
293 const u8 *key, int key_len, int key_idx,
294 const u8 *sae_data, int sae_data_len);
295int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
296 struct net_device *dev,
297 struct ieee80211_channel *chan,
298 const u8 *bssid,
299 const u8 *ssid, int ssid_len,
300 struct cfg80211_assoc_request *req);
301int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
302 struct net_device *dev, const u8 *bssid,
303 const u8 *ie, int ie_len, u16 reason,
304 bool local_state_change);
305int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
306 struct net_device *dev, const u8 *bssid,
307 const u8 *ie, int ie_len, u16 reason,
308 bool local_state_change);
309void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
310 struct net_device *dev);
311int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
312 u16 frame_type, const u8 *match_data,
313 int match_len);
314void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
315void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
316int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
317 struct wireless_dev *wdev,
318 struct ieee80211_channel *chan, bool offchan,
319 unsigned int wait, const u8 *buf, size_t len,
320 bool no_cck, bool dont_wait_for_ack, u64 *cookie);
321void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
322 const struct ieee80211_ht_cap *ht_capa_mask);
323void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
324 const struct ieee80211_vht_cap *vht_capa_mask);
325
326/* SME events */
327int cfg80211_connect(struct cfg80211_registered_device *rdev,
328 struct net_device *dev,
329 struct cfg80211_connect_params *connect,
330 struct cfg80211_cached_keys *connkeys,
331 const u8 *prev_bssid);
332void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
333 const u8 *req_ie, size_t req_ie_len,
334 const u8 *resp_ie, size_t resp_ie_len,
335 u16 status, bool wextev,
336 struct cfg80211_bss *bss);
337void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
338 size_t ie_len, u16 reason, bool from_ap);
339int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
340 struct net_device *dev, u16 reason,
341 bool wextev);
342void __cfg80211_roamed(struct wireless_dev *wdev,
343 struct cfg80211_bss *bss,
344 const u8 *req_ie, size_t req_ie_len,
345 const u8 *resp_ie, size_t resp_ie_len);
346int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
347 struct wireless_dev *wdev);
348
349/* SME implementation */
350void cfg80211_conn_work(struct work_struct *work);
351void cfg80211_sme_scan_done(struct net_device *dev);
352bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
353void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
354void cfg80211_sme_disassoc(struct wireless_dev *wdev);
355void cfg80211_sme_deauth(struct wireless_dev *wdev);
356void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
357void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
358
359/* internal helpers */
360bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
361int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
362 struct key_params *params, int key_idx,
363 bool pairwise, const u8 *mac_addr);
364void __cfg80211_scan_done(struct work_struct *wk);
365void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
366void __cfg80211_sched_scan_results(struct work_struct *wk);
367int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
368 bool driver_initiated);
369void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
370int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
371 struct net_device *dev, enum nl80211_iftype ntype,
372 u32 *flags, struct vif_params *params);
373void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
374void cfg80211_process_wdev_events(struct wireless_dev *wdev);
375
376int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
377 struct wireless_dev *wdev,
378 enum nl80211_iftype iftype,
379 struct ieee80211_channel *chan,
380 enum cfg80211_chan_mode chanmode,
381 u8 radar_detect);
382
383/**
384 * cfg80211_chandef_dfs_required - checks if radar detection is required
385 * @wiphy: the wiphy to validate against
386 * @chandef: the channel definition to check
387 * Return: 1 if radar detection is required, 0 if it is not, < 0 on error
388 */
389int cfg80211_chandef_dfs_required(struct wiphy *wiphy,
390 const struct cfg80211_chan_def *c);
391
392void cfg80211_set_dfs_state(struct wiphy *wiphy,
393 const struct cfg80211_chan_def *chandef,
394 enum nl80211_dfs_state dfs_state);
395
396void cfg80211_dfs_channels_update_work(struct work_struct *work);
397
398
399static inline int
400cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
401 struct wireless_dev *wdev,
402 enum nl80211_iftype iftype)
403{
404 return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
405 CHAN_MODE_UNDEFINED, 0);
406}
407
408static inline int
409cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
410 enum nl80211_iftype iftype)
411{
412 return cfg80211_can_change_interface(rdev, NULL, iftype);
413}
414
415static inline int
416cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
417 struct wireless_dev *wdev,
418 struct ieee80211_channel *chan,
419 enum cfg80211_chan_mode chanmode)
420{
421 return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
422 chan, chanmode, 0);
423}
424
425static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
426{
427 unsigned long end = jiffies;
428
429 if (end >= start)
430 return jiffies_to_msecs(end - start);
431
432 return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
433}
434
435void
436cfg80211_get_chan_state(struct wireless_dev *wdev,
437 struct ieee80211_channel **chan,
438 enum cfg80211_chan_mode *chanmode);
439
440int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
441 struct cfg80211_chan_def *chandef);
442
443int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
444 const u8 *rates, unsigned int n_rates,
445 u32 *mask);
446
447int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
448 u32 beacon_int);
449
450void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
451 enum nl80211_iftype iftype, int num);
452
453void cfg80211_leave(struct cfg80211_registered_device *rdev,
454 struct wireless_dev *wdev);
455
456void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
457 struct wireless_dev *wdev);
458
459#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
460
461#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
462#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
463#else
464/*
465 * Trick to enable using it as a condition,
466 * and also not give a warning when it's
467 * not used that way.
468 */
469#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
470#endif
471
472#endif /* __NET_WIRELESS_CORE_H */