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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 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 /* must be last because of the way we do wiphy_priv(),
84 * and it should at least be aligned to NETDEV_ALIGN */
85 struct wiphy wiphy __aligned(NETDEV_ALIGN);
86};
87
88static inline
89struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
90{
91 BUG_ON(!wiphy);
92 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
93}
94
95static inline void
96cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
97{
98#ifdef CONFIG_PM
99 int i;
100
101 if (!rdev->wiphy.wowlan_config)
102 return;
103 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
104 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
105 kfree(rdev->wiphy.wowlan_config->patterns);
106 if (rdev->wiphy.wowlan_config->tcp &&
107 rdev->wiphy.wowlan_config->tcp->sock)
108 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
109 kfree(rdev->wiphy.wowlan_config->tcp);
110 kfree(rdev->wiphy.wowlan_config);
111#endif
112}
113
114extern struct workqueue_struct *cfg80211_wq;
115extern struct list_head cfg80211_rdev_list;
116extern int cfg80211_rdev_list_generation;
117
118struct cfg80211_internal_bss {
119 struct list_head list;
120 struct list_head hidden_list;
121 struct rb_node rbn;
122 unsigned long ts;
123 unsigned long refcount;
124 atomic_t hold;
125
126 /* must be last because of priv member */
127 struct cfg80211_bss pub;
128};
129
130static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
131{
132 return container_of(pub, struct cfg80211_internal_bss, pub);
133}
134
135static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
136{
137 atomic_inc(&bss->hold);
138}
139
140static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
141{
142 int r = atomic_dec_return(&bss->hold);
143 WARN_ON(r < 0);
144}
145
146
147struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
148int get_wiphy_idx(struct wiphy *wiphy);
149
150struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
151
152int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
153 struct net *net);
154
155static inline void wdev_lock(struct wireless_dev *wdev)
156 __acquires(wdev)
157{
158 mutex_lock(&wdev->mtx);
159 __acquire(wdev->mtx);
160}
161
162static inline void wdev_unlock(struct wireless_dev *wdev)
163 __releases(wdev)
164{
165 __release(wdev->mtx);
166 mutex_unlock(&wdev->mtx);
167}
168
169#define ASSERT_RDEV_LOCK(rdev) ASSERT_RTNL()
170#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
171
172static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
173{
174 ASSERT_RTNL();
175
176 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
177 rdev->num_running_ifaces > 0;
178}
179
180enum cfg80211_event_type {
181 EVENT_CONNECT_RESULT,
182 EVENT_ROAMED,
183 EVENT_DISCONNECTED,
184 EVENT_IBSS_JOINED,
185};
186
187struct cfg80211_event {
188 struct list_head list;
189 enum cfg80211_event_type type;
190
191 union {
192 struct {
193 u8 bssid[ETH_ALEN];
194 const u8 *req_ie;
195 const u8 *resp_ie;
196 size_t req_ie_len;
197 size_t resp_ie_len;
198 u16 status;
199 } cr;
200 struct {
201 const u8 *req_ie;
202 const u8 *resp_ie;
203 size_t req_ie_len;
204 size_t resp_ie_len;
205 struct cfg80211_bss *bss;
206 } rm;
207 struct {
208 const u8 *ie;
209 size_t ie_len;
210 u16 reason;
211 } dc;
212 struct {
213 u8 bssid[ETH_ALEN];
214 } ij;
215 };
216};
217
218struct cfg80211_cached_keys {
219 struct key_params params[6];
220 u8 data[6][WLAN_MAX_KEY_LEN];
221 int def, defmgmt;
222};
223
224enum cfg80211_chan_mode {
225 CHAN_MODE_UNDEFINED,
226 CHAN_MODE_SHARED,
227 CHAN_MODE_EXCLUSIVE,
228};
229
230struct cfg80211_beacon_registration {
231 struct list_head list;
232 u32 nlportid;
233};
234
235/* free object */
236void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
237
238int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
239 char *newname);
240
241void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
242
243void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
244void cfg80211_bss_age(struct cfg80211_registered_device *dev,
245 unsigned long age_secs);
246
247/* IBSS */
248int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
249 struct net_device *dev,
250 struct cfg80211_ibss_params *params,
251 struct cfg80211_cached_keys *connkeys);
252int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
253 struct net_device *dev,
254 struct cfg80211_ibss_params *params,
255 struct cfg80211_cached_keys *connkeys);
256void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
257int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
258 struct net_device *dev, bool nowext);
259int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
260 struct net_device *dev, bool nowext);
261void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
262int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
263 struct wireless_dev *wdev);
264
265/* mesh */
266extern const struct mesh_config default_mesh_config;
267extern const struct mesh_setup default_mesh_setup;
268int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
269 struct net_device *dev,
270 struct mesh_setup *setup,
271 const struct mesh_config *conf);
272int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
273 struct net_device *dev,
274 struct mesh_setup *setup,
275 const struct mesh_config *conf);
276int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
277 struct net_device *dev);
278int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
279 struct wireless_dev *wdev,
280 struct cfg80211_chan_def *chandef);
281
282/* AP */
283int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
284 struct net_device *dev);
285
286/* MLME */
287int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
288 struct net_device *dev,
289 struct ieee80211_channel *chan,
290 enum nl80211_auth_type auth_type,
291 const u8 *bssid,
292 const u8 *ssid, int ssid_len,
293 const u8 *ie, int ie_len,
294 const u8 *key, int key_len, int key_idx,
295 const u8 *sae_data, int sae_data_len);
296int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
297 struct net_device *dev,
298 struct ieee80211_channel *chan,
299 const u8 *bssid,
300 const u8 *ssid, int ssid_len,
301 struct cfg80211_assoc_request *req);
302int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
303 struct net_device *dev, const u8 *bssid,
304 const u8 *ie, int ie_len, u16 reason,
305 bool local_state_change);
306int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
307 struct net_device *dev, const u8 *bssid,
308 const u8 *ie, int ie_len, u16 reason,
309 bool local_state_change);
310void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
311 struct net_device *dev);
312int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
313 u16 frame_type, const u8 *match_data,
314 int match_len);
315void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
316void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
317int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
318 struct wireless_dev *wdev,
319 struct cfg80211_mgmt_tx_params *params,
320 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,
366 bool send_message);
367void __cfg80211_sched_scan_results(struct work_struct *wk);
368int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
369 bool driver_initiated);
370void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
371int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
372 struct net_device *dev, enum nl80211_iftype ntype,
373 u32 *flags, struct vif_params *params);
374void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
375void cfg80211_process_wdev_events(struct wireless_dev *wdev);
376
377int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
378 struct wireless_dev *wdev,
379 enum nl80211_iftype iftype,
380 struct ieee80211_channel *chan,
381 enum cfg80211_chan_mode chanmode,
382 u8 radar_detect);
383
384/**
385 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
386 * @wiphy: the wiphy to validate against
387 * @chandef: the channel definition to check
388 *
389 * Checks if chandef is usable and we can/need start CAC on such channel.
390 *
391 * Return: Return true if all channels available and at least
392 * one channel require CAC (NL80211_DFS_USABLE)
393 */
394bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
395 const struct cfg80211_chan_def *chandef);
396
397void cfg80211_set_dfs_state(struct wiphy *wiphy,
398 const struct cfg80211_chan_def *chandef,
399 enum nl80211_dfs_state dfs_state);
400
401void cfg80211_dfs_channels_update_work(struct work_struct *work);
402
403
404static inline int
405cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
406 struct wireless_dev *wdev,
407 enum nl80211_iftype iftype)
408{
409 return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
410 CHAN_MODE_UNDEFINED, 0);
411}
412
413static inline int
414cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
415 enum nl80211_iftype iftype)
416{
417 if (rfkill_blocked(rdev->rfkill))
418 return -ERFKILL;
419
420 return cfg80211_can_change_interface(rdev, NULL, iftype);
421}
422
423static inline int
424cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
425 struct wireless_dev *wdev,
426 struct ieee80211_channel *chan,
427 enum cfg80211_chan_mode chanmode)
428{
429 return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
430 chan, chanmode, 0);
431}
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 + (MAX_JIFFY_OFFSET - 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
448int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
449 struct cfg80211_chan_def *chandef);
450
451int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
452 const u8 *rates, unsigned int n_rates,
453 u32 *mask);
454
455int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
456 u32 beacon_int);
457
458void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
459 enum nl80211_iftype iftype, int num);
460
461void cfg80211_leave(struct cfg80211_registered_device *rdev,
462 struct wireless_dev *wdev);
463
464void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
465 struct wireless_dev *wdev);
466
467#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
468
469#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
470#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
471#else
472/*
473 * Trick to enable using it as a condition,
474 * and also not give a warning when it's
475 * not used that way.
476 */
477#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
478#endif
479
480#endif /* __NET_WIRELESS_CORE_H */