Commit | Line | Data |
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8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
b2e1b302 | 5 | * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com> |
8318d78a JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
b2e1b302 LR |
12 | /** |
13 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
14 | * |
15 | * The usual implementation is for a driver to read a device EEPROM to | |
16 | * determine which regulatory domain it should be operating under, then | |
17 | * looking up the allowable channels in a driver-local table and finally | |
18 | * registering those channels in the wiphy structure. | |
19 | * | |
b2e1b302 LR |
20 | * Another set of compliance enforcement is for drivers to use their |
21 | * own compliance limits which can be stored on the EEPROM. The host | |
22 | * driver or firmware may ensure these are used. | |
23 | * | |
24 | * In addition to all this we provide an extra layer of regulatory | |
25 | * conformance. For drivers which do not have any regulatory | |
26 | * information CRDA provides the complete regulatory solution. | |
27 | * For others it provides a community effort on further restrictions | |
28 | * to enhance compliance. | |
29 | * | |
30 | * Note: When number of rules --> infinity we will not be able to | |
31 | * index on alpha2 any more, instead we'll probably have to | |
32 | * rely on some SHA1 checksum of the regdomain for example. | |
33 | * | |
8318d78a JB |
34 | */ |
35 | #include <linux/kernel.h> | |
b2e1b302 LR |
36 | #include <linux/list.h> |
37 | #include <linux/random.h> | |
38 | #include <linux/nl80211.h> | |
39 | #include <linux/platform_device.h> | |
b2e1b302 | 40 | #include <net/cfg80211.h> |
8318d78a | 41 | #include "core.h" |
b2e1b302 | 42 | #include "reg.h" |
3b377ea9 | 43 | #include "regdb.h" |
73d54c9e | 44 | #include "nl80211.h" |
8318d78a | 45 | |
4113f751 | 46 | #ifdef CONFIG_CFG80211_REG_DEBUG |
8271195e | 47 | #define REG_DBG_PRINT(format, args...) \ |
4113f751 | 48 | do { \ |
8271195e | 49 | printk(KERN_DEBUG format , ## args); \ |
4113f751 LR |
50 | } while (0) |
51 | #else | |
8271195e | 52 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
53 | #endif |
54 | ||
5166ccd2 | 55 | /* Receipt of information from last regulatory request */ |
f6037d09 | 56 | static struct regulatory_request *last_request; |
734366de | 57 | |
b2e1b302 LR |
58 | /* To trigger userspace events */ |
59 | static struct platform_device *reg_pdev; | |
8318d78a | 60 | |
fb1fc7ad LR |
61 | /* |
62 | * Central wireless core regulatory domains, we only need two, | |
734366de | 63 | * the current one and a world regulatory domain in case we have no |
fb1fc7ad LR |
64 | * information to give us an alpha2 |
65 | */ | |
f130347c | 66 | const struct ieee80211_regdomain *cfg80211_regdomain; |
734366de | 67 | |
fb1fc7ad LR |
68 | /* |
69 | * We use this as a place for the rd structure built from the | |
3f2355cb | 70 | * last parsed country IE to rest until CRDA gets back to us with |
fb1fc7ad LR |
71 | * what it thinks should apply for the same country |
72 | */ | |
3f2355cb LR |
73 | static const struct ieee80211_regdomain *country_ie_regdomain; |
74 | ||
abc7381b LR |
75 | /* |
76 | * Protects static reg.c components: | |
77 | * - cfg80211_world_regdom | |
78 | * - cfg80211_regdom | |
79 | * - country_ie_regdomain | |
80 | * - last_request | |
81 | */ | |
82 | DEFINE_MUTEX(reg_mutex); | |
83 | #define assert_reg_lock() WARN_ON(!mutex_is_locked(®_mutex)) | |
84 | ||
e38f8a7a | 85 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
86 | static LIST_HEAD(reg_requests_list); |
87 | static spinlock_t reg_requests_lock; | |
88 | ||
e38f8a7a LR |
89 | /* Used to queue up beacon hints for review */ |
90 | static LIST_HEAD(reg_pending_beacons); | |
91 | static spinlock_t reg_pending_beacons_lock; | |
92 | ||
93 | /* Used to keep track of processed beacon hints */ | |
94 | static LIST_HEAD(reg_beacon_list); | |
95 | ||
96 | struct reg_beacon { | |
97 | struct list_head list; | |
98 | struct ieee80211_channel chan; | |
99 | }; | |
100 | ||
734366de JB |
101 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
102 | static const struct ieee80211_regdomain world_regdom = { | |
611b6a82 | 103 | .n_reg_rules = 5, |
734366de JB |
104 | .alpha2 = "00", |
105 | .reg_rules = { | |
68798a62 LR |
106 | /* IEEE 802.11b/g, channels 1..11 */ |
107 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
611b6a82 LR |
108 | /* IEEE 802.11b/g, channels 12..13. No HT40 |
109 | * channel fits here. */ | |
110 | REG_RULE(2467-10, 2472+10, 20, 6, 20, | |
3fc71f77 LR |
111 | NL80211_RRF_PASSIVE_SCAN | |
112 | NL80211_RRF_NO_IBSS), | |
611b6a82 LR |
113 | /* IEEE 802.11 channel 14 - Only JP enables |
114 | * this and for 802.11b only */ | |
115 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
116 | NL80211_RRF_PASSIVE_SCAN | | |
117 | NL80211_RRF_NO_IBSS | | |
118 | NL80211_RRF_NO_OFDM), | |
119 | /* IEEE 802.11a, channel 36..48 */ | |
ec329ace | 120 | REG_RULE(5180-10, 5240+10, 40, 6, 20, |
611b6a82 LR |
121 | NL80211_RRF_PASSIVE_SCAN | |
122 | NL80211_RRF_NO_IBSS), | |
3fc71f77 LR |
123 | |
124 | /* NB: 5260 MHz - 5700 MHz requies DFS */ | |
125 | ||
126 | /* IEEE 802.11a, channel 149..165 */ | |
ec329ace | 127 | REG_RULE(5745-10, 5825+10, 40, 6, 20, |
3fc71f77 LR |
128 | NL80211_RRF_PASSIVE_SCAN | |
129 | NL80211_RRF_NO_IBSS), | |
734366de JB |
130 | } |
131 | }; | |
132 | ||
a3d2eaf0 JB |
133 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
134 | &world_regdom; | |
734366de | 135 | |
6ee7d330 | 136 | static char *ieee80211_regdom = "00"; |
6ee7d330 | 137 | |
734366de JB |
138 | module_param(ieee80211_regdom, charp, 0444); |
139 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
140 | ||
734366de JB |
141 | static void reset_regdomains(void) |
142 | { | |
942b25cf JB |
143 | /* avoid freeing static information or freeing something twice */ |
144 | if (cfg80211_regdomain == cfg80211_world_regdom) | |
145 | cfg80211_regdomain = NULL; | |
146 | if (cfg80211_world_regdom == &world_regdom) | |
147 | cfg80211_world_regdom = NULL; | |
148 | if (cfg80211_regdomain == &world_regdom) | |
149 | cfg80211_regdomain = NULL; | |
942b25cf JB |
150 | |
151 | kfree(cfg80211_regdomain); | |
152 | kfree(cfg80211_world_regdom); | |
734366de | 153 | |
a3d2eaf0 | 154 | cfg80211_world_regdom = &world_regdom; |
734366de JB |
155 | cfg80211_regdomain = NULL; |
156 | } | |
157 | ||
fb1fc7ad LR |
158 | /* |
159 | * Dynamic world regulatory domain requested by the wireless | |
160 | * core upon initialization | |
161 | */ | |
a3d2eaf0 | 162 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 163 | { |
f6037d09 | 164 | BUG_ON(!last_request); |
734366de JB |
165 | |
166 | reset_regdomains(); | |
167 | ||
168 | cfg80211_world_regdom = rd; | |
169 | cfg80211_regdomain = rd; | |
170 | } | |
734366de | 171 | |
a3d2eaf0 | 172 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
173 | { |
174 | if (!alpha2) | |
175 | return false; | |
176 | if (alpha2[0] == '0' && alpha2[1] == '0') | |
177 | return true; | |
178 | return false; | |
179 | } | |
8318d78a | 180 | |
a3d2eaf0 | 181 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
182 | { |
183 | if (!alpha2) | |
184 | return false; | |
185 | if (alpha2[0] != 0 && alpha2[1] != 0) | |
186 | return true; | |
187 | return false; | |
188 | } | |
8318d78a | 189 | |
b2e1b302 LR |
190 | static bool is_alpha_upper(char letter) |
191 | { | |
192 | /* ASCII A - Z */ | |
193 | if (letter >= 65 && letter <= 90) | |
194 | return true; | |
195 | return false; | |
196 | } | |
8318d78a | 197 | |
a3d2eaf0 | 198 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
199 | { |
200 | if (!alpha2) | |
201 | return false; | |
fb1fc7ad LR |
202 | /* |
203 | * Special case where regulatory domain was built by driver | |
204 | * but a specific alpha2 cannot be determined | |
205 | */ | |
b2e1b302 LR |
206 | if (alpha2[0] == '9' && alpha2[1] == '9') |
207 | return true; | |
208 | return false; | |
209 | } | |
8318d78a | 210 | |
3f2355cb LR |
211 | static bool is_intersected_alpha2(const char *alpha2) |
212 | { | |
213 | if (!alpha2) | |
214 | return false; | |
fb1fc7ad LR |
215 | /* |
216 | * Special case where regulatory domain is the | |
3f2355cb | 217 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
218 | * structures |
219 | */ | |
3f2355cb LR |
220 | if (alpha2[0] == '9' && alpha2[1] == '8') |
221 | return true; | |
222 | return false; | |
223 | } | |
224 | ||
a3d2eaf0 | 225 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
226 | { |
227 | if (!alpha2) | |
228 | return false; | |
229 | if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) | |
230 | return true; | |
231 | return false; | |
232 | } | |
8318d78a | 233 | |
a3d2eaf0 | 234 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
235 | { |
236 | if (!alpha2_x || !alpha2_y) | |
237 | return false; | |
238 | if (alpha2_x[0] == alpha2_y[0] && | |
239 | alpha2_x[1] == alpha2_y[1]) | |
240 | return true; | |
241 | return false; | |
242 | } | |
243 | ||
69b1572b | 244 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 245 | { |
761cf7ec LR |
246 | assert_cfg80211_lock(); |
247 | ||
b2e1b302 LR |
248 | if (!cfg80211_regdomain) |
249 | return true; | |
250 | if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) | |
251 | return false; | |
252 | return true; | |
253 | } | |
254 | ||
3f2355cb LR |
255 | /** |
256 | * country_ie_integrity_changes - tells us if the country IE has changed | |
257 | * @checksum: checksum of country IE of fields we are interested in | |
258 | * | |
259 | * If the country IE has not changed you can ignore it safely. This is | |
260 | * useful to determine if two devices are seeing two different country IEs | |
261 | * even on the same alpha2. Note that this will return false if no IE has | |
262 | * been set on the wireless core yet. | |
263 | */ | |
264 | static bool country_ie_integrity_changes(u32 checksum) | |
265 | { | |
266 | /* If no IE has been set then the checksum doesn't change */ | |
267 | if (unlikely(!last_request->country_ie_checksum)) | |
268 | return false; | |
269 | if (unlikely(last_request->country_ie_checksum != checksum)) | |
270 | return true; | |
271 | return false; | |
272 | } | |
273 | ||
3b377ea9 JL |
274 | static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, |
275 | const struct ieee80211_regdomain *src_regd) | |
276 | { | |
277 | struct ieee80211_regdomain *regd; | |
278 | int size_of_regd = 0; | |
279 | unsigned int i; | |
280 | ||
281 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
282 | ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); | |
283 | ||
284 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
285 | if (!regd) | |
286 | return -ENOMEM; | |
287 | ||
288 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
289 | ||
290 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
291 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
292 | sizeof(struct ieee80211_reg_rule)); | |
293 | ||
294 | *dst_regd = regd; | |
295 | return 0; | |
296 | } | |
297 | ||
298 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
299 | struct reg_regdb_search_request { | |
300 | char alpha2[2]; | |
301 | struct list_head list; | |
302 | }; | |
303 | ||
304 | static LIST_HEAD(reg_regdb_search_list); | |
305 | static DEFINE_SPINLOCK(reg_regdb_search_lock); | |
306 | ||
307 | static void reg_regdb_search(struct work_struct *work) | |
308 | { | |
309 | struct reg_regdb_search_request *request; | |
310 | const struct ieee80211_regdomain *curdom, *regdom; | |
311 | int i, r; | |
312 | ||
313 | spin_lock(®_regdb_search_lock); | |
314 | while (!list_empty(®_regdb_search_list)) { | |
315 | request = list_first_entry(®_regdb_search_list, | |
316 | struct reg_regdb_search_request, | |
317 | list); | |
318 | list_del(&request->list); | |
319 | ||
320 | for (i=0; i<reg_regdb_size; i++) { | |
321 | curdom = reg_regdb[i]; | |
322 | ||
323 | if (!memcmp(request->alpha2, curdom->alpha2, 2)) { | |
324 | r = reg_copy_regd(®dom, curdom); | |
325 | if (r) | |
326 | break; | |
327 | spin_unlock(®_regdb_search_lock); | |
328 | mutex_lock(&cfg80211_mutex); | |
329 | set_regdom(regdom); | |
330 | mutex_unlock(&cfg80211_mutex); | |
331 | spin_lock(®_regdb_search_lock); | |
332 | break; | |
333 | } | |
334 | } | |
335 | ||
336 | kfree(request); | |
337 | } | |
338 | spin_unlock(®_regdb_search_lock); | |
339 | } | |
340 | ||
341 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
342 | ||
343 | static void reg_regdb_query(const char *alpha2) | |
344 | { | |
345 | struct reg_regdb_search_request *request; | |
346 | ||
347 | if (!alpha2) | |
348 | return; | |
349 | ||
350 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
351 | if (!request) | |
352 | return; | |
353 | ||
354 | memcpy(request->alpha2, alpha2, 2); | |
355 | ||
356 | spin_lock(®_regdb_search_lock); | |
357 | list_add_tail(&request->list, ®_regdb_search_list); | |
358 | spin_unlock(®_regdb_search_lock); | |
359 | ||
360 | schedule_work(®_regdb_work); | |
361 | } | |
362 | #else | |
363 | static inline void reg_regdb_query(const char *alpha2) {} | |
364 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
365 | ||
fb1fc7ad LR |
366 | /* |
367 | * This lets us keep regulatory code which is updated on a regulatory | |
368 | * basis in userspace. | |
369 | */ | |
b2e1b302 LR |
370 | static int call_crda(const char *alpha2) |
371 | { | |
372 | char country_env[9 + 2] = "COUNTRY="; | |
373 | char *envp[] = { | |
374 | country_env, | |
375 | NULL | |
376 | }; | |
377 | ||
378 | if (!is_world_regdom((char *) alpha2)) | |
379 | printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", | |
380 | alpha2[0], alpha2[1]); | |
381 | else | |
b2e1b302 LR |
382 | printk(KERN_INFO "cfg80211: Calling CRDA to update world " |
383 | "regulatory domain\n"); | |
b2e1b302 | 384 | |
3b377ea9 JL |
385 | /* query internal regulatory database (if it exists) */ |
386 | reg_regdb_query(alpha2); | |
387 | ||
b2e1b302 LR |
388 | country_env[8] = alpha2[0]; |
389 | country_env[9] = alpha2[1]; | |
390 | ||
391 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); | |
392 | } | |
393 | ||
b2e1b302 | 394 | /* Used by nl80211 before kmalloc'ing our regulatory domain */ |
a3d2eaf0 | 395 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 396 | { |
61405e97 LR |
397 | assert_cfg80211_lock(); |
398 | ||
f6037d09 JB |
399 | if (!last_request) |
400 | return false; | |
401 | ||
402 | return alpha2_equal(last_request->alpha2, alpha2); | |
b2e1b302 | 403 | } |
8318d78a | 404 | |
b2e1b302 | 405 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 406 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 407 | { |
a3d2eaf0 | 408 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
409 | u32 freq_diff; |
410 | ||
91e99004 | 411 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
412 | return false; |
413 | ||
414 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
415 | return false; | |
416 | ||
417 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
418 | ||
bd05f28e RK |
419 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
420 | freq_range->max_bandwidth_khz > freq_diff) | |
b2e1b302 LR |
421 | return false; |
422 | ||
423 | return true; | |
424 | } | |
425 | ||
a3d2eaf0 | 426 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 427 | { |
a3d2eaf0 | 428 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 429 | unsigned int i; |
8318d78a | 430 | |
b2e1b302 LR |
431 | if (!rd->n_reg_rules) |
432 | return false; | |
8318d78a | 433 | |
88dc1c3f LR |
434 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
435 | return false; | |
436 | ||
b2e1b302 LR |
437 | for (i = 0; i < rd->n_reg_rules; i++) { |
438 | reg_rule = &rd->reg_rules[i]; | |
439 | if (!is_valid_reg_rule(reg_rule)) | |
440 | return false; | |
441 | } | |
442 | ||
443 | return true; | |
8318d78a JB |
444 | } |
445 | ||
038659e7 LR |
446 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
447 | u32 center_freq_khz, | |
448 | u32 bw_khz) | |
b2e1b302 | 449 | { |
038659e7 LR |
450 | u32 start_freq_khz, end_freq_khz; |
451 | ||
452 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
453 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
454 | ||
455 | if (start_freq_khz >= freq_range->start_freq_khz && | |
456 | end_freq_khz <= freq_range->end_freq_khz) | |
457 | return true; | |
458 | ||
459 | return false; | |
b2e1b302 | 460 | } |
8318d78a | 461 | |
0c7dc45d LR |
462 | /** |
463 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
464 | * @freq_range: frequency rule we want to query | |
465 | * @freq_khz: frequency we are inquiring about | |
466 | * | |
467 | * This lets us know if a specific frequency rule is or is not relevant to | |
468 | * a specific frequency's band. Bands are device specific and artificial | |
469 | * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is | |
470 | * safe for now to assume that a frequency rule should not be part of a | |
471 | * frequency's band if the start freq or end freq are off by more than 2 GHz. | |
472 | * This resolution can be lowered and should be considered as we add | |
473 | * regulatory rule support for other "bands". | |
474 | **/ | |
475 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
476 | u32 freq_khz) | |
477 | { | |
478 | #define ONE_GHZ_IN_KHZ 1000000 | |
479 | if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) | |
480 | return true; | |
481 | if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) | |
482 | return true; | |
483 | return false; | |
484 | #undef ONE_GHZ_IN_KHZ | |
485 | } | |
486 | ||
84920e3e LR |
487 | /* |
488 | * This is a work around for sanity checking ieee80211_channel_to_frequency()'s | |
489 | * work. ieee80211_channel_to_frequency() can for example currently provide a | |
490 | * 2 GHz channel when in fact a 5 GHz channel was desired. An example would be | |
491 | * an AP providing channel 8 on a country IE triplet when it sent this on the | |
492 | * 5 GHz band, that channel is designed to be channel 8 on 5 GHz, not a 2 GHz | |
493 | * channel. | |
494 | * | |
495 | * This can be removed once ieee80211_channel_to_frequency() takes in a band. | |
496 | */ | |
497 | static bool chan_in_band(int chan, enum ieee80211_band band) | |
498 | { | |
499 | int center_freq = ieee80211_channel_to_frequency(chan); | |
500 | ||
501 | switch (band) { | |
502 | case IEEE80211_BAND_2GHZ: | |
503 | if (center_freq <= 2484) | |
504 | return true; | |
505 | return false; | |
506 | case IEEE80211_BAND_5GHZ: | |
507 | if (center_freq >= 5005) | |
508 | return true; | |
509 | return false; | |
510 | default: | |
511 | return false; | |
512 | } | |
513 | } | |
514 | ||
cc5d8a37 LR |
515 | /* |
516 | * Some APs may send a country IE triplet for each channel they | |
517 | * support and while this is completely overkill and silly we still | |
518 | * need to support it. We avoid making a single rule for each channel | |
519 | * though and to help us with this we use this helper to find the | |
520 | * actual subband end channel. These type of country IE triplet | |
521 | * scenerios are handled then, all yielding two regulaotry rules from | |
522 | * parsing a country IE: | |
523 | * | |
524 | * [1] | |
525 | * [2] | |
526 | * [36] | |
527 | * [40] | |
528 | * | |
529 | * [1] | |
530 | * [2-4] | |
531 | * [5-12] | |
532 | * [36] | |
533 | * [40-44] | |
534 | * | |
535 | * [1-4] | |
536 | * [5-7] | |
537 | * [36-44] | |
538 | * [48-64] | |
539 | * | |
540 | * [36-36] | |
541 | * [40-40] | |
542 | * [44-44] | |
543 | * [48-48] | |
544 | * [52-52] | |
545 | * [56-56] | |
546 | * [60-60] | |
547 | * [64-64] | |
548 | * [100-100] | |
549 | * [104-104] | |
550 | * [108-108] | |
551 | * [112-112] | |
552 | * [116-116] | |
553 | * [120-120] | |
554 | * [124-124] | |
555 | * [128-128] | |
556 | * [132-132] | |
557 | * [136-136] | |
558 | * [140-140] | |
559 | * | |
560 | * Returns 0 if the IE has been found to be invalid in the middle | |
561 | * somewhere. | |
562 | */ | |
84920e3e LR |
563 | static int max_subband_chan(enum ieee80211_band band, |
564 | int orig_cur_chan, | |
cc5d8a37 LR |
565 | int orig_end_channel, |
566 | s8 orig_max_power, | |
567 | u8 **country_ie, | |
568 | u8 *country_ie_len) | |
569 | { | |
570 | u8 *triplets_start = *country_ie; | |
571 | u8 len_at_triplet = *country_ie_len; | |
572 | int end_subband_chan = orig_end_channel; | |
cc5d8a37 LR |
573 | |
574 | /* | |
575 | * We'll deal with padding for the caller unless | |
576 | * its not immediate and we don't process any channels | |
577 | */ | |
578 | if (*country_ie_len == 1) { | |
579 | *country_ie += 1; | |
580 | *country_ie_len -= 1; | |
581 | return orig_end_channel; | |
582 | } | |
583 | ||
584 | /* Move to the next triplet and then start search */ | |
585 | *country_ie += 3; | |
586 | *country_ie_len -= 3; | |
587 | ||
84920e3e LR |
588 | if (!chan_in_band(orig_cur_chan, band)) |
589 | return 0; | |
cc5d8a37 LR |
590 | |
591 | while (*country_ie_len >= 3) { | |
592 | int end_channel = 0; | |
593 | struct ieee80211_country_ie_triplet *triplet = | |
594 | (struct ieee80211_country_ie_triplet *) *country_ie; | |
595 | int cur_channel = 0, next_expected_chan; | |
cc5d8a37 LR |
596 | |
597 | /* means last triplet is completely unrelated to this one */ | |
598 | if (triplet->ext.reg_extension_id >= | |
599 | IEEE80211_COUNTRY_EXTENSION_ID) { | |
600 | *country_ie -= 3; | |
601 | *country_ie_len += 3; | |
602 | break; | |
603 | } | |
604 | ||
605 | if (triplet->chans.first_channel == 0) { | |
606 | *country_ie += 1; | |
607 | *country_ie_len -= 1; | |
608 | if (*country_ie_len != 0) | |
609 | return 0; | |
610 | break; | |
611 | } | |
612 | ||
a0f2e0fc LR |
613 | if (triplet->chans.num_channels == 0) |
614 | return 0; | |
615 | ||
cc5d8a37 LR |
616 | /* Monitonically increasing channel order */ |
617 | if (triplet->chans.first_channel <= end_subband_chan) | |
618 | return 0; | |
619 | ||
84920e3e LR |
620 | if (!chan_in_band(triplet->chans.first_channel, band)) |
621 | return 0; | |
622 | ||
cc5d8a37 LR |
623 | /* 2 GHz */ |
624 | if (triplet->chans.first_channel <= 14) { | |
625 | end_channel = triplet->chans.first_channel + | |
626 | triplet->chans.num_channels - 1; | |
627 | } | |
628 | else { | |
629 | end_channel = triplet->chans.first_channel + | |
630 | (4 * (triplet->chans.num_channels - 1)); | |
cc5d8a37 LR |
631 | } |
632 | ||
84920e3e LR |
633 | if (!chan_in_band(end_channel, band)) |
634 | return 0; | |
cc5d8a37 LR |
635 | |
636 | if (orig_max_power != triplet->chans.max_power) { | |
637 | *country_ie -= 3; | |
638 | *country_ie_len += 3; | |
639 | break; | |
640 | } | |
641 | ||
642 | cur_channel = triplet->chans.first_channel; | |
643 | ||
644 | /* The key is finding the right next expected channel */ | |
645 | if (band == IEEE80211_BAND_2GHZ) | |
646 | next_expected_chan = end_subband_chan + 1; | |
647 | else | |
648 | next_expected_chan = end_subband_chan + 4; | |
649 | ||
650 | if (cur_channel != next_expected_chan) { | |
651 | *country_ie -= 3; | |
652 | *country_ie_len += 3; | |
653 | break; | |
654 | } | |
655 | ||
656 | end_subband_chan = end_channel; | |
657 | ||
658 | /* Move to the next one */ | |
659 | *country_ie += 3; | |
660 | *country_ie_len -= 3; | |
661 | ||
662 | /* | |
663 | * Padding needs to be dealt with if we processed | |
664 | * some channels. | |
665 | */ | |
666 | if (*country_ie_len == 1) { | |
667 | *country_ie += 1; | |
668 | *country_ie_len -= 1; | |
669 | break; | |
670 | } | |
671 | ||
672 | /* If seen, the IE is invalid */ | |
673 | if (*country_ie_len == 2) | |
674 | return 0; | |
675 | } | |
676 | ||
677 | if (end_subband_chan == orig_end_channel) { | |
678 | *country_ie = triplets_start; | |
679 | *country_ie_len = len_at_triplet; | |
680 | return orig_end_channel; | |
681 | } | |
682 | ||
683 | return end_subband_chan; | |
684 | } | |
685 | ||
fb1fc7ad LR |
686 | /* |
687 | * Converts a country IE to a regulatory domain. A regulatory domain | |
3f2355cb LR |
688 | * structure has a lot of information which the IE doesn't yet have, |
689 | * so for the other values we use upper max values as we will intersect | |
fb1fc7ad LR |
690 | * with our userspace regulatory agent to get lower bounds. |
691 | */ | |
3f2355cb | 692 | static struct ieee80211_regdomain *country_ie_2_rd( |
84920e3e | 693 | enum ieee80211_band band, |
3f2355cb LR |
694 | u8 *country_ie, |
695 | u8 country_ie_len, | |
696 | u32 *checksum) | |
697 | { | |
698 | struct ieee80211_regdomain *rd = NULL; | |
699 | unsigned int i = 0; | |
700 | char alpha2[2]; | |
701 | u32 flags = 0; | |
702 | u32 num_rules = 0, size_of_regd = 0; | |
703 | u8 *triplets_start = NULL; | |
704 | u8 len_at_triplet = 0; | |
705 | /* the last channel we have registered in a subband (triplet) */ | |
706 | int last_sub_max_channel = 0; | |
707 | ||
708 | *checksum = 0xDEADBEEF; | |
709 | ||
710 | /* Country IE requirements */ | |
711 | BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || | |
712 | country_ie_len & 0x01); | |
713 | ||
714 | alpha2[0] = country_ie[0]; | |
715 | alpha2[1] = country_ie[1]; | |
716 | ||
717 | /* | |
718 | * Third octet can be: | |
719 | * 'I' - Indoor | |
720 | * 'O' - Outdoor | |
721 | * | |
722 | * anything else we assume is no restrictions | |
723 | */ | |
724 | if (country_ie[2] == 'I') | |
725 | flags = NL80211_RRF_NO_OUTDOOR; | |
726 | else if (country_ie[2] == 'O') | |
727 | flags = NL80211_RRF_NO_INDOOR; | |
728 | ||
729 | country_ie += 3; | |
730 | country_ie_len -= 3; | |
731 | ||
732 | triplets_start = country_ie; | |
733 | len_at_triplet = country_ie_len; | |
734 | ||
735 | *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); | |
736 | ||
fb1fc7ad LR |
737 | /* |
738 | * We need to build a reg rule for each triplet, but first we must | |
3f2355cb | 739 | * calculate the number of reg rules we will need. We will need one |
fb1fc7ad LR |
740 | * for each channel subband |
741 | */ | |
3f2355cb | 742 | while (country_ie_len >= 3) { |
615aab4b | 743 | int end_channel = 0; |
3f2355cb LR |
744 | struct ieee80211_country_ie_triplet *triplet = |
745 | (struct ieee80211_country_ie_triplet *) country_ie; | |
746 | int cur_sub_max_channel = 0, cur_channel = 0; | |
747 | ||
748 | if (triplet->ext.reg_extension_id >= | |
749 | IEEE80211_COUNTRY_EXTENSION_ID) { | |
750 | country_ie += 3; | |
751 | country_ie_len -= 3; | |
752 | continue; | |
753 | } | |
754 | ||
cc5d8a37 LR |
755 | /* |
756 | * APs can add padding to make length divisible | |
757 | * by two, required by the spec. | |
758 | */ | |
759 | if (triplet->chans.first_channel == 0) { | |
760 | country_ie++; | |
761 | country_ie_len--; | |
762 | /* This is expected to be at the very end only */ | |
763 | if (country_ie_len != 0) | |
764 | return NULL; | |
765 | break; | |
766 | } | |
767 | ||
a0f2e0fc LR |
768 | if (triplet->chans.num_channels == 0) |
769 | return NULL; | |
770 | ||
84920e3e LR |
771 | if (!chan_in_band(triplet->chans.first_channel, band)) |
772 | return NULL; | |
773 | ||
615aab4b | 774 | /* 2 GHz */ |
84920e3e | 775 | if (band == IEEE80211_BAND_2GHZ) |
615aab4b | 776 | end_channel = triplet->chans.first_channel + |
e99c7cd5 | 777 | triplet->chans.num_channels - 1; |
615aab4b LR |
778 | else |
779 | /* | |
780 | * 5 GHz -- For example in country IEs if the first | |
781 | * channel given is 36 and the number of channels is 4 | |
782 | * then the individual channel numbers defined for the | |
783 | * 5 GHz PHY by these parameters are: 36, 40, 44, and 48 | |
784 | * and not 36, 37, 38, 39. | |
785 | * | |
786 | * See: http://tinyurl.com/11d-clarification | |
787 | */ | |
788 | end_channel = triplet->chans.first_channel + | |
789 | (4 * (triplet->chans.num_channels - 1)); | |
790 | ||
3f2355cb | 791 | cur_channel = triplet->chans.first_channel; |
cc5d8a37 LR |
792 | |
793 | /* | |
794 | * Enhancement for APs that send a triplet for every channel | |
795 | * or for whatever reason sends triplets with multiple channels | |
796 | * separated when in fact they should be together. | |
797 | */ | |
84920e3e LR |
798 | end_channel = max_subband_chan(band, |
799 | cur_channel, | |
cc5d8a37 LR |
800 | end_channel, |
801 | triplet->chans.max_power, | |
802 | &country_ie, | |
803 | &country_ie_len); | |
804 | if (!end_channel) | |
805 | return NULL; | |
806 | ||
84920e3e LR |
807 | if (!chan_in_band(end_channel, band)) |
808 | return NULL; | |
809 | ||
615aab4b | 810 | cur_sub_max_channel = end_channel; |
3f2355cb LR |
811 | |
812 | /* Basic sanity check */ | |
813 | if (cur_sub_max_channel < cur_channel) | |
814 | return NULL; | |
815 | ||
fb1fc7ad LR |
816 | /* |
817 | * Do not allow overlapping channels. Also channels | |
3f2355cb | 818 | * passed in each subband must be monotonically |
fb1fc7ad LR |
819 | * increasing |
820 | */ | |
3f2355cb LR |
821 | if (last_sub_max_channel) { |
822 | if (cur_channel <= last_sub_max_channel) | |
823 | return NULL; | |
824 | if (cur_sub_max_channel <= last_sub_max_channel) | |
825 | return NULL; | |
826 | } | |
827 | ||
fb1fc7ad LR |
828 | /* |
829 | * When dot11RegulatoryClassesRequired is supported | |
3f2355cb LR |
830 | * we can throw ext triplets as part of this soup, |
831 | * for now we don't care when those change as we | |
fb1fc7ad LR |
832 | * don't support them |
833 | */ | |
3f2355cb LR |
834 | *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | |
835 | ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | | |
836 | ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); | |
837 | ||
838 | last_sub_max_channel = cur_sub_max_channel; | |
839 | ||
3f2355cb LR |
840 | num_rules++; |
841 | ||
cc5d8a37 LR |
842 | if (country_ie_len >= 3) { |
843 | country_ie += 3; | |
844 | country_ie_len -= 3; | |
845 | } | |
846 | ||
fb1fc7ad LR |
847 | /* |
848 | * Note: this is not a IEEE requirement but | |
849 | * simply a memory requirement | |
850 | */ | |
3f2355cb LR |
851 | if (num_rules > NL80211_MAX_SUPP_REG_RULES) |
852 | return NULL; | |
853 | } | |
854 | ||
855 | country_ie = triplets_start; | |
856 | country_ie_len = len_at_triplet; | |
857 | ||
858 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
859 | (num_rules * sizeof(struct ieee80211_reg_rule)); | |
860 | ||
861 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
862 | if (!rd) | |
863 | return NULL; | |
864 | ||
865 | rd->n_reg_rules = num_rules; | |
866 | rd->alpha2[0] = alpha2[0]; | |
867 | rd->alpha2[1] = alpha2[1]; | |
868 | ||
869 | /* This time around we fill in the rd */ | |
870 | while (country_ie_len >= 3) { | |
02e68a3d | 871 | int end_channel = 0; |
3f2355cb LR |
872 | struct ieee80211_country_ie_triplet *triplet = |
873 | (struct ieee80211_country_ie_triplet *) country_ie; | |
874 | struct ieee80211_reg_rule *reg_rule = NULL; | |
875 | struct ieee80211_freq_range *freq_range = NULL; | |
876 | struct ieee80211_power_rule *power_rule = NULL; | |
877 | ||
fb1fc7ad LR |
878 | /* |
879 | * Must parse if dot11RegulatoryClassesRequired is true, | |
880 | * we don't support this yet | |
881 | */ | |
3f2355cb LR |
882 | if (triplet->ext.reg_extension_id >= |
883 | IEEE80211_COUNTRY_EXTENSION_ID) { | |
884 | country_ie += 3; | |
885 | country_ie_len -= 3; | |
886 | continue; | |
887 | } | |
888 | ||
cc5d8a37 LR |
889 | if (triplet->chans.first_channel == 0) { |
890 | country_ie++; | |
891 | country_ie_len--; | |
892 | break; | |
893 | } | |
894 | ||
3f2355cb LR |
895 | reg_rule = &rd->reg_rules[i]; |
896 | freq_range = ®_rule->freq_range; | |
897 | power_rule = ®_rule->power_rule; | |
898 | ||
899 | reg_rule->flags = flags; | |
900 | ||
02e68a3d | 901 | /* 2 GHz */ |
84920e3e | 902 | if (band == IEEE80211_BAND_2GHZ) |
02e68a3d | 903 | end_channel = triplet->chans.first_channel + |
e99c7cd5 | 904 | triplet->chans.num_channels -1; |
02e68a3d | 905 | else |
02e68a3d LR |
906 | end_channel = triplet->chans.first_channel + |
907 | (4 * (triplet->chans.num_channels - 1)); | |
908 | ||
84920e3e LR |
909 | end_channel = max_subband_chan(band, |
910 | triplet->chans.first_channel, | |
cc5d8a37 LR |
911 | end_channel, |
912 | triplet->chans.max_power, | |
913 | &country_ie, | |
914 | &country_ie_len); | |
915 | ||
fb1fc7ad LR |
916 | /* |
917 | * The +10 is since the regulatory domain expects | |
3f2355cb LR |
918 | * the actual band edge, not the center of freq for |
919 | * its start and end freqs, assuming 20 MHz bandwidth on | |
fb1fc7ad LR |
920 | * the channels passed |
921 | */ | |
3f2355cb LR |
922 | freq_range->start_freq_khz = |
923 | MHZ_TO_KHZ(ieee80211_channel_to_frequency( | |
924 | triplet->chans.first_channel) - 10); | |
925 | freq_range->end_freq_khz = | |
926 | MHZ_TO_KHZ(ieee80211_channel_to_frequency( | |
02e68a3d | 927 | end_channel) + 10); |
3f2355cb | 928 | |
fb1fc7ad LR |
929 | /* |
930 | * These are large arbitrary values we use to intersect later. | |
931 | * Increment this if we ever support >= 40 MHz channels | |
932 | * in IEEE 802.11 | |
933 | */ | |
3f2355cb LR |
934 | freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); |
935 | power_rule->max_antenna_gain = DBI_TO_MBI(100); | |
08030db6 | 936 | power_rule->max_eirp = DBM_TO_MBM(triplet->chans.max_power); |
3f2355cb | 937 | |
3f2355cb LR |
938 | i++; |
939 | ||
cc5d8a37 LR |
940 | if (country_ie_len >= 3) { |
941 | country_ie += 3; | |
942 | country_ie_len -= 3; | |
943 | } | |
944 | ||
3f2355cb LR |
945 | BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); |
946 | } | |
947 | ||
948 | return rd; | |
949 | } | |
950 | ||
951 | ||
fb1fc7ad LR |
952 | /* |
953 | * Helper for regdom_intersect(), this does the real | |
954 | * mathematical intersection fun | |
955 | */ | |
9c96477d LR |
956 | static int reg_rules_intersect( |
957 | const struct ieee80211_reg_rule *rule1, | |
958 | const struct ieee80211_reg_rule *rule2, | |
959 | struct ieee80211_reg_rule *intersected_rule) | |
960 | { | |
961 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
962 | struct ieee80211_freq_range *freq_range; | |
963 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
964 | struct ieee80211_power_rule *power_rule; | |
965 | u32 freq_diff; | |
966 | ||
967 | freq_range1 = &rule1->freq_range; | |
968 | freq_range2 = &rule2->freq_range; | |
969 | freq_range = &intersected_rule->freq_range; | |
970 | ||
971 | power_rule1 = &rule1->power_rule; | |
972 | power_rule2 = &rule2->power_rule; | |
973 | power_rule = &intersected_rule->power_rule; | |
974 | ||
975 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
976 | freq_range2->start_freq_khz); | |
977 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, | |
978 | freq_range2->end_freq_khz); | |
979 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, | |
980 | freq_range2->max_bandwidth_khz); | |
981 | ||
982 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
983 | if (freq_range->max_bandwidth_khz > freq_diff) | |
984 | freq_range->max_bandwidth_khz = freq_diff; | |
985 | ||
986 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
987 | power_rule2->max_eirp); | |
988 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
989 | power_rule2->max_antenna_gain); | |
990 | ||
991 | intersected_rule->flags = (rule1->flags | rule2->flags); | |
992 | ||
993 | if (!is_valid_reg_rule(intersected_rule)) | |
994 | return -EINVAL; | |
995 | ||
996 | return 0; | |
997 | } | |
998 | ||
999 | /** | |
1000 | * regdom_intersect - do the intersection between two regulatory domains | |
1001 | * @rd1: first regulatory domain | |
1002 | * @rd2: second regulatory domain | |
1003 | * | |
1004 | * Use this function to get the intersection between two regulatory domains. | |
1005 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
1006 | * as no one single alpha2 can represent this regulatory domain. | |
1007 | * | |
1008 | * Returns a pointer to the regulatory domain structure which will hold the | |
1009 | * resulting intersection of rules between rd1 and rd2. We will | |
1010 | * kzalloc() this structure for you. | |
1011 | */ | |
1012 | static struct ieee80211_regdomain *regdom_intersect( | |
1013 | const struct ieee80211_regdomain *rd1, | |
1014 | const struct ieee80211_regdomain *rd2) | |
1015 | { | |
1016 | int r, size_of_regd; | |
1017 | unsigned int x, y; | |
1018 | unsigned int num_rules = 0, rule_idx = 0; | |
1019 | const struct ieee80211_reg_rule *rule1, *rule2; | |
1020 | struct ieee80211_reg_rule *intersected_rule; | |
1021 | struct ieee80211_regdomain *rd; | |
1022 | /* This is just a dummy holder to help us count */ | |
1023 | struct ieee80211_reg_rule irule; | |
1024 | ||
1025 | /* Uses the stack temporarily for counter arithmetic */ | |
1026 | intersected_rule = &irule; | |
1027 | ||
1028 | memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); | |
1029 | ||
1030 | if (!rd1 || !rd2) | |
1031 | return NULL; | |
1032 | ||
fb1fc7ad LR |
1033 | /* |
1034 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
1035 | * build them. This is to so we can malloc() and free() a |
1036 | * regdomain once. The reason we use reg_rules_intersect() here | |
1037 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
1038 | * All rules that do check out OK are valid. |
1039 | */ | |
9c96477d LR |
1040 | |
1041 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
1042 | rule1 = &rd1->reg_rules[x]; | |
1043 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
1044 | rule2 = &rd2->reg_rules[y]; | |
1045 | if (!reg_rules_intersect(rule1, rule2, | |
1046 | intersected_rule)) | |
1047 | num_rules++; | |
1048 | memset(intersected_rule, 0, | |
1049 | sizeof(struct ieee80211_reg_rule)); | |
1050 | } | |
1051 | } | |
1052 | ||
1053 | if (!num_rules) | |
1054 | return NULL; | |
1055 | ||
1056 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
1057 | ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); | |
1058 | ||
1059 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
1060 | if (!rd) | |
1061 | return NULL; | |
1062 | ||
1063 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
1064 | rule1 = &rd1->reg_rules[x]; | |
1065 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
1066 | rule2 = &rd2->reg_rules[y]; | |
fb1fc7ad LR |
1067 | /* |
1068 | * This time around instead of using the stack lets | |
9c96477d | 1069 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
1070 | * a memcpy() |
1071 | */ | |
9c96477d LR |
1072 | intersected_rule = &rd->reg_rules[rule_idx]; |
1073 | r = reg_rules_intersect(rule1, rule2, | |
1074 | intersected_rule); | |
fb1fc7ad LR |
1075 | /* |
1076 | * No need to memset here the intersected rule here as | |
1077 | * we're not using the stack anymore | |
1078 | */ | |
9c96477d LR |
1079 | if (r) |
1080 | continue; | |
1081 | rule_idx++; | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | if (rule_idx != num_rules) { | |
1086 | kfree(rd); | |
1087 | return NULL; | |
1088 | } | |
1089 | ||
1090 | rd->n_reg_rules = num_rules; | |
1091 | rd->alpha2[0] = '9'; | |
1092 | rd->alpha2[1] = '8'; | |
1093 | ||
1094 | return rd; | |
1095 | } | |
1096 | ||
fb1fc7ad LR |
1097 | /* |
1098 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
1099 | * want to just have the channel structure use these | |
1100 | */ | |
b2e1b302 LR |
1101 | static u32 map_regdom_flags(u32 rd_flags) |
1102 | { | |
1103 | u32 channel_flags = 0; | |
1104 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) | |
1105 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; | |
1106 | if (rd_flags & NL80211_RRF_NO_IBSS) | |
1107 | channel_flags |= IEEE80211_CHAN_NO_IBSS; | |
1108 | if (rd_flags & NL80211_RRF_DFS) | |
1109 | channel_flags |= IEEE80211_CHAN_RADAR; | |
1110 | return channel_flags; | |
1111 | } | |
1112 | ||
1fa25e41 LR |
1113 | static int freq_reg_info_regd(struct wiphy *wiphy, |
1114 | u32 center_freq, | |
038659e7 | 1115 | u32 desired_bw_khz, |
1fa25e41 LR |
1116 | const struct ieee80211_reg_rule **reg_rule, |
1117 | const struct ieee80211_regdomain *custom_regd) | |
8318d78a JB |
1118 | { |
1119 | int i; | |
0c7dc45d | 1120 | bool band_rule_found = false; |
3e0c3ff3 | 1121 | const struct ieee80211_regdomain *regd; |
038659e7 LR |
1122 | bool bw_fits = false; |
1123 | ||
1124 | if (!desired_bw_khz) | |
1125 | desired_bw_khz = MHZ_TO_KHZ(20); | |
8318d78a | 1126 | |
1fa25e41 | 1127 | regd = custom_regd ? custom_regd : cfg80211_regdomain; |
3e0c3ff3 | 1128 | |
fb1fc7ad LR |
1129 | /* |
1130 | * Follow the driver's regulatory domain, if present, unless a country | |
1131 | * IE has been processed or a user wants to help complaince further | |
1132 | */ | |
7db90f4a LR |
1133 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
1134 | last_request->initiator != NL80211_REGDOM_SET_BY_USER && | |
3e0c3ff3 LR |
1135 | wiphy->regd) |
1136 | regd = wiphy->regd; | |
1137 | ||
1138 | if (!regd) | |
b2e1b302 LR |
1139 | return -EINVAL; |
1140 | ||
3e0c3ff3 | 1141 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
1142 | const struct ieee80211_reg_rule *rr; |
1143 | const struct ieee80211_freq_range *fr = NULL; | |
1144 | const struct ieee80211_power_rule *pr = NULL; | |
1145 | ||
3e0c3ff3 | 1146 | rr = ®d->reg_rules[i]; |
b2e1b302 LR |
1147 | fr = &rr->freq_range; |
1148 | pr = &rr->power_rule; | |
0c7dc45d | 1149 | |
fb1fc7ad LR |
1150 | /* |
1151 | * We only need to know if one frequency rule was | |
0c7dc45d | 1152 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
1153 | * not overwrite it once found |
1154 | */ | |
0c7dc45d LR |
1155 | if (!band_rule_found) |
1156 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
1157 | ||
038659e7 LR |
1158 | bw_fits = reg_does_bw_fit(fr, |
1159 | center_freq, | |
1160 | desired_bw_khz); | |
0c7dc45d | 1161 | |
038659e7 | 1162 | if (band_rule_found && bw_fits) { |
b2e1b302 | 1163 | *reg_rule = rr; |
038659e7 | 1164 | return 0; |
8318d78a JB |
1165 | } |
1166 | } | |
1167 | ||
0c7dc45d LR |
1168 | if (!band_rule_found) |
1169 | return -ERANGE; | |
1170 | ||
038659e7 | 1171 | return -EINVAL; |
b2e1b302 | 1172 | } |
34f57347 | 1173 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 1174 | |
038659e7 LR |
1175 | int freq_reg_info(struct wiphy *wiphy, |
1176 | u32 center_freq, | |
1177 | u32 desired_bw_khz, | |
1178 | const struct ieee80211_reg_rule **reg_rule) | |
1fa25e41 | 1179 | { |
ac46d48e | 1180 | assert_cfg80211_lock(); |
038659e7 LR |
1181 | return freq_reg_info_regd(wiphy, |
1182 | center_freq, | |
1183 | desired_bw_khz, | |
1184 | reg_rule, | |
1185 | NULL); | |
1fa25e41 | 1186 | } |
b2e1b302 | 1187 | |
038659e7 LR |
1188 | /* |
1189 | * Note that right now we assume the desired channel bandwidth | |
1190 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
1191 | * per channel, the primary and the extension channel). To support | |
1192 | * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a | |
1193 | * new ieee80211_channel.target_bw and re run the regulatory check | |
1194 | * on the wiphy with the target_bw specified. Then we can simply use | |
1195 | * that below for the desired_bw_khz below. | |
1196 | */ | |
a92a3ce7 LR |
1197 | static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, |
1198 | unsigned int chan_idx) | |
b2e1b302 LR |
1199 | { |
1200 | int r; | |
038659e7 LR |
1201 | u32 flags, bw_flags = 0; |
1202 | u32 desired_bw_khz = MHZ_TO_KHZ(20); | |
b2e1b302 LR |
1203 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1204 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1205 | const struct ieee80211_freq_range *freq_range = NULL; |
a92a3ce7 LR |
1206 | struct ieee80211_supported_band *sband; |
1207 | struct ieee80211_channel *chan; | |
fe33eb39 | 1208 | struct wiphy *request_wiphy = NULL; |
a92a3ce7 | 1209 | |
761cf7ec LR |
1210 | assert_cfg80211_lock(); |
1211 | ||
806a9e39 LR |
1212 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
1213 | ||
a92a3ce7 LR |
1214 | sband = wiphy->bands[band]; |
1215 | BUG_ON(chan_idx >= sband->n_channels); | |
1216 | chan = &sband->channels[chan_idx]; | |
1217 | ||
1218 | flags = chan->orig_flags; | |
b2e1b302 | 1219 | |
038659e7 LR |
1220 | r = freq_reg_info(wiphy, |
1221 | MHZ_TO_KHZ(chan->center_freq), | |
1222 | desired_bw_khz, | |
1223 | ®_rule); | |
b2e1b302 LR |
1224 | |
1225 | if (r) { | |
fb1fc7ad LR |
1226 | /* |
1227 | * This means no regulatory rule was found in the country IE | |
0c7dc45d LR |
1228 | * with a frequency range on the center_freq's band, since |
1229 | * IEEE-802.11 allows for a country IE to have a subset of the | |
1230 | * regulatory information provided in a country we ignore | |
1231 | * disabling the channel unless at least one reg rule was | |
1232 | * found on the center_freq's band. For details see this | |
1233 | * clarification: | |
1234 | * | |
1235 | * http://tinyurl.com/11d-clarification | |
1236 | */ | |
1237 | if (r == -ERANGE && | |
7db90f4a LR |
1238 | last_request->initiator == |
1239 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
4113f751 | 1240 | REG_DBG_PRINT("cfg80211: Leaving channel %d MHz " |
0c7dc45d LR |
1241 | "intact on %s - no rule found in band on " |
1242 | "Country IE\n", | |
4113f751 | 1243 | chan->center_freq, wiphy_name(wiphy)); |
0c7dc45d | 1244 | } else { |
fb1fc7ad LR |
1245 | /* |
1246 | * In this case we know the country IE has at least one reg rule | |
1247 | * for the band so we respect its band definitions | |
1248 | */ | |
7db90f4a LR |
1249 | if (last_request->initiator == |
1250 | NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
4113f751 | 1251 | REG_DBG_PRINT("cfg80211: Disabling " |
0c7dc45d LR |
1252 | "channel %d MHz on %s due to " |
1253 | "Country IE\n", | |
1254 | chan->center_freq, wiphy_name(wiphy)); | |
0c7dc45d LR |
1255 | flags |= IEEE80211_CHAN_DISABLED; |
1256 | chan->flags = flags; | |
1257 | } | |
8318d78a JB |
1258 | return; |
1259 | } | |
1260 | ||
b2e1b302 | 1261 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1262 | freq_range = ®_rule->freq_range; |
1263 | ||
1264 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1265 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
b2e1b302 | 1266 | |
7db90f4a | 1267 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1268 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 1269 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad LR |
1270 | /* |
1271 | * This gaurantees the driver's requested regulatory domain | |
f976376d | 1272 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1273 | * settings |
1274 | */ | |
f976376d | 1275 | chan->flags = chan->orig_flags = |
038659e7 | 1276 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1277 | chan->max_antenna_gain = chan->orig_mag = |
1278 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
f976376d LR |
1279 | chan->max_power = chan->orig_mpwr = |
1280 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1281 | return; | |
1282 | } | |
1283 | ||
038659e7 | 1284 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
8318d78a | 1285 | chan->max_antenna_gain = min(chan->orig_mag, |
b2e1b302 | 1286 | (int) MBI_TO_DBI(power_rule->max_antenna_gain)); |
253898c4 | 1287 | if (chan->orig_mpwr) |
b2e1b302 LR |
1288 | chan->max_power = min(chan->orig_mpwr, |
1289 | (int) MBM_TO_DBM(power_rule->max_eirp)); | |
253898c4 | 1290 | else |
b2e1b302 | 1291 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
8318d78a JB |
1292 | } |
1293 | ||
a92a3ce7 | 1294 | static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) |
8318d78a | 1295 | { |
a92a3ce7 LR |
1296 | unsigned int i; |
1297 | struct ieee80211_supported_band *sband; | |
1298 | ||
1299 | BUG_ON(!wiphy->bands[band]); | |
1300 | sband = wiphy->bands[band]; | |
8318d78a JB |
1301 | |
1302 | for (i = 0; i < sband->n_channels; i++) | |
a92a3ce7 | 1303 | handle_channel(wiphy, band, i); |
8318d78a JB |
1304 | } |
1305 | ||
7db90f4a LR |
1306 | static bool ignore_reg_update(struct wiphy *wiphy, |
1307 | enum nl80211_reg_initiator initiator) | |
14b9815a LR |
1308 | { |
1309 | if (!last_request) | |
1310 | return true; | |
7db90f4a | 1311 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
5be83de5 | 1312 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
14b9815a | 1313 | return true; |
fb1fc7ad LR |
1314 | /* |
1315 | * wiphy->regd will be set once the device has its own | |
1316 | * desired regulatory domain set | |
1317 | */ | |
5be83de5 | 1318 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
f976376d | 1319 | !is_world_regdom(last_request->alpha2)) |
14b9815a LR |
1320 | return true; |
1321 | return false; | |
1322 | } | |
1323 | ||
7db90f4a | 1324 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
8318d78a | 1325 | { |
79c97e97 | 1326 | struct cfg80211_registered_device *rdev; |
8318d78a | 1327 | |
79c97e97 JB |
1328 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1329 | wiphy_update_regulatory(&rdev->wiphy, initiator); | |
b2e1b302 LR |
1330 | } |
1331 | ||
e38f8a7a LR |
1332 | static void handle_reg_beacon(struct wiphy *wiphy, |
1333 | unsigned int chan_idx, | |
1334 | struct reg_beacon *reg_beacon) | |
1335 | { | |
e38f8a7a LR |
1336 | struct ieee80211_supported_band *sband; |
1337 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1338 | bool channel_changed = false; |
1339 | struct ieee80211_channel chan_before; | |
e38f8a7a LR |
1340 | |
1341 | assert_cfg80211_lock(); | |
1342 | ||
1343 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1344 | chan = &sband->channels[chan_idx]; | |
1345 | ||
1346 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1347 | return; | |
1348 | ||
6bad8766 LR |
1349 | if (chan->beacon_found) |
1350 | return; | |
1351 | ||
1352 | chan->beacon_found = true; | |
1353 | ||
5be83de5 | 1354 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
1355 | return; |
1356 | ||
6bad8766 LR |
1357 | chan_before.center_freq = chan->center_freq; |
1358 | chan_before.flags = chan->flags; | |
1359 | ||
37184244 | 1360 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
e38f8a7a | 1361 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
6bad8766 | 1362 | channel_changed = true; |
e38f8a7a LR |
1363 | } |
1364 | ||
37184244 | 1365 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
e38f8a7a | 1366 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
6bad8766 | 1367 | channel_changed = true; |
e38f8a7a LR |
1368 | } |
1369 | ||
6bad8766 LR |
1370 | if (channel_changed) |
1371 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1372 | } |
1373 | ||
1374 | /* | |
1375 | * Called when a scan on a wiphy finds a beacon on | |
1376 | * new channel | |
1377 | */ | |
1378 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1379 | struct reg_beacon *reg_beacon) | |
1380 | { | |
1381 | unsigned int i; | |
1382 | struct ieee80211_supported_band *sband; | |
1383 | ||
1384 | assert_cfg80211_lock(); | |
1385 | ||
1386 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1387 | return; | |
1388 | ||
1389 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1390 | ||
1391 | for (i = 0; i < sband->n_channels; i++) | |
1392 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1393 | } | |
1394 | ||
1395 | /* | |
1396 | * Called upon reg changes or a new wiphy is added | |
1397 | */ | |
1398 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1399 | { | |
1400 | unsigned int i; | |
1401 | struct ieee80211_supported_band *sband; | |
1402 | struct reg_beacon *reg_beacon; | |
1403 | ||
1404 | assert_cfg80211_lock(); | |
1405 | ||
1406 | if (list_empty(®_beacon_list)) | |
1407 | return; | |
1408 | ||
1409 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { | |
1410 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1411 | continue; | |
1412 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1413 | for (i = 0; i < sband->n_channels; i++) | |
1414 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | static bool reg_is_world_roaming(struct wiphy *wiphy) | |
1419 | { | |
1420 | if (is_world_regdom(cfg80211_regdomain->alpha2) || | |
1421 | (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) | |
1422 | return true; | |
b1ed8ddd LR |
1423 | if (last_request && |
1424 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
5be83de5 | 1425 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
e38f8a7a LR |
1426 | return true; |
1427 | return false; | |
1428 | } | |
1429 | ||
1430 | /* Reap the advantages of previously found beacons */ | |
1431 | static void reg_process_beacons(struct wiphy *wiphy) | |
1432 | { | |
b1ed8ddd LR |
1433 | /* |
1434 | * Means we are just firing up cfg80211, so no beacons would | |
1435 | * have been processed yet. | |
1436 | */ | |
1437 | if (!last_request) | |
1438 | return; | |
e38f8a7a LR |
1439 | if (!reg_is_world_roaming(wiphy)) |
1440 | return; | |
1441 | wiphy_update_beacon_reg(wiphy); | |
1442 | } | |
1443 | ||
038659e7 LR |
1444 | static bool is_ht40_not_allowed(struct ieee80211_channel *chan) |
1445 | { | |
1446 | if (!chan) | |
1447 | return true; | |
1448 | if (chan->flags & IEEE80211_CHAN_DISABLED) | |
1449 | return true; | |
1450 | /* This would happen when regulatory rules disallow HT40 completely */ | |
1451 | if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) | |
1452 | return true; | |
1453 | return false; | |
1454 | } | |
1455 | ||
1456 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
1457 | enum ieee80211_band band, | |
1458 | unsigned int chan_idx) | |
1459 | { | |
1460 | struct ieee80211_supported_band *sband; | |
1461 | struct ieee80211_channel *channel; | |
1462 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; | |
1463 | unsigned int i; | |
1464 | ||
1465 | assert_cfg80211_lock(); | |
1466 | ||
1467 | sband = wiphy->bands[band]; | |
1468 | BUG_ON(chan_idx >= sband->n_channels); | |
1469 | channel = &sband->channels[chan_idx]; | |
1470 | ||
1471 | if (is_ht40_not_allowed(channel)) { | |
1472 | channel->flags |= IEEE80211_CHAN_NO_HT40; | |
1473 | return; | |
1474 | } | |
1475 | ||
1476 | /* | |
1477 | * We need to ensure the extension channels exist to | |
1478 | * be able to use HT40- or HT40+, this finds them (or not) | |
1479 | */ | |
1480 | for (i = 0; i < sband->n_channels; i++) { | |
1481 | struct ieee80211_channel *c = &sband->channels[i]; | |
1482 | if (c->center_freq == (channel->center_freq - 20)) | |
1483 | channel_before = c; | |
1484 | if (c->center_freq == (channel->center_freq + 20)) | |
1485 | channel_after = c; | |
1486 | } | |
1487 | ||
1488 | /* | |
1489 | * Please note that this assumes target bandwidth is 20 MHz, | |
1490 | * if that ever changes we also need to change the below logic | |
1491 | * to include that as well. | |
1492 | */ | |
1493 | if (is_ht40_not_allowed(channel_before)) | |
689da1b3 | 1494 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1495 | else |
689da1b3 | 1496 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 LR |
1497 | |
1498 | if (is_ht40_not_allowed(channel_after)) | |
689da1b3 | 1499 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1500 | else |
689da1b3 | 1501 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1502 | } |
1503 | ||
1504 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
1505 | enum ieee80211_band band) | |
1506 | { | |
1507 | unsigned int i; | |
1508 | struct ieee80211_supported_band *sband; | |
1509 | ||
1510 | BUG_ON(!wiphy->bands[band]); | |
1511 | sband = wiphy->bands[band]; | |
1512 | ||
1513 | for (i = 0; i < sband->n_channels; i++) | |
1514 | reg_process_ht_flags_channel(wiphy, band, i); | |
1515 | } | |
1516 | ||
1517 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1518 | { | |
1519 | enum ieee80211_band band; | |
1520 | ||
1521 | if (!wiphy) | |
1522 | return; | |
1523 | ||
1524 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1525 | if (wiphy->bands[band]) | |
1526 | reg_process_ht_flags_band(wiphy, band); | |
1527 | } | |
1528 | ||
1529 | } | |
1530 | ||
7db90f4a LR |
1531 | void wiphy_update_regulatory(struct wiphy *wiphy, |
1532 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1533 | { |
1534 | enum ieee80211_band band; | |
d46e5b1d | 1535 | |
7db90f4a | 1536 | if (ignore_reg_update(wiphy, initiator)) |
e38f8a7a | 1537 | goto out; |
b2e1b302 | 1538 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
8318d78a | 1539 | if (wiphy->bands[band]) |
a92a3ce7 | 1540 | handle_band(wiphy, band); |
b2e1b302 | 1541 | } |
e38f8a7a LR |
1542 | out: |
1543 | reg_process_beacons(wiphy); | |
038659e7 | 1544 | reg_process_ht_flags(wiphy); |
560e28e1 | 1545 | if (wiphy->reg_notifier) |
716f9392 | 1546 | wiphy->reg_notifier(wiphy, last_request); |
b2e1b302 LR |
1547 | } |
1548 | ||
1fa25e41 LR |
1549 | static void handle_channel_custom(struct wiphy *wiphy, |
1550 | enum ieee80211_band band, | |
1551 | unsigned int chan_idx, | |
1552 | const struct ieee80211_regdomain *regd) | |
1553 | { | |
1554 | int r; | |
038659e7 LR |
1555 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
1556 | u32 bw_flags = 0; | |
1fa25e41 LR |
1557 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1558 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1559 | const struct ieee80211_freq_range *freq_range = NULL; |
1fa25e41 LR |
1560 | struct ieee80211_supported_band *sband; |
1561 | struct ieee80211_channel *chan; | |
1562 | ||
abc7381b | 1563 | assert_reg_lock(); |
ac46d48e | 1564 | |
1fa25e41 LR |
1565 | sband = wiphy->bands[band]; |
1566 | BUG_ON(chan_idx >= sband->n_channels); | |
1567 | chan = &sband->channels[chan_idx]; | |
1568 | ||
038659e7 LR |
1569 | r = freq_reg_info_regd(wiphy, |
1570 | MHZ_TO_KHZ(chan->center_freq), | |
1571 | desired_bw_khz, | |
1572 | ®_rule, | |
1573 | regd); | |
1fa25e41 LR |
1574 | |
1575 | if (r) { | |
1576 | chan->flags = IEEE80211_CHAN_DISABLED; | |
1577 | return; | |
1578 | } | |
1579 | ||
1580 | power_rule = ®_rule->power_rule; | |
038659e7 LR |
1581 | freq_range = ®_rule->freq_range; |
1582 | ||
1583 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1584 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
1fa25e41 | 1585 | |
038659e7 | 1586 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1587 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
1fa25e41 LR |
1588 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
1589 | } | |
1590 | ||
1591 | static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, | |
1592 | const struct ieee80211_regdomain *regd) | |
1593 | { | |
1594 | unsigned int i; | |
1595 | struct ieee80211_supported_band *sband; | |
1596 | ||
1597 | BUG_ON(!wiphy->bands[band]); | |
1598 | sband = wiphy->bands[band]; | |
1599 | ||
1600 | for (i = 0; i < sband->n_channels; i++) | |
1601 | handle_channel_custom(wiphy, band, i, regd); | |
1602 | } | |
1603 | ||
1604 | /* Used by drivers prior to wiphy registration */ | |
1605 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1606 | const struct ieee80211_regdomain *regd) | |
1607 | { | |
1608 | enum ieee80211_band band; | |
bbcf3f02 | 1609 | unsigned int bands_set = 0; |
ac46d48e | 1610 | |
abc7381b | 1611 | mutex_lock(®_mutex); |
1fa25e41 | 1612 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1613 | if (!wiphy->bands[band]) |
1614 | continue; | |
1615 | handle_band_custom(wiphy, band, regd); | |
1616 | bands_set++; | |
b2e1b302 | 1617 | } |
abc7381b | 1618 | mutex_unlock(®_mutex); |
bbcf3f02 LR |
1619 | |
1620 | /* | |
1621 | * no point in calling this if it won't have any effect | |
1622 | * on your device's supportd bands. | |
1623 | */ | |
1624 | WARN_ON(!bands_set); | |
b2e1b302 | 1625 | } |
1fa25e41 LR |
1626 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1627 | ||
fb1fc7ad LR |
1628 | /* |
1629 | * Return value which can be used by ignore_request() to indicate | |
1630 | * it has been determined we should intersect two regulatory domains | |
1631 | */ | |
9c96477d LR |
1632 | #define REG_INTERSECT 1 |
1633 | ||
84fa4f43 JB |
1634 | /* This has the logic which determines when a new request |
1635 | * should be ignored. */ | |
2f92cd2e LR |
1636 | static int ignore_request(struct wiphy *wiphy, |
1637 | struct regulatory_request *pending_request) | |
84fa4f43 | 1638 | { |
806a9e39 | 1639 | struct wiphy *last_wiphy = NULL; |
761cf7ec LR |
1640 | |
1641 | assert_cfg80211_lock(); | |
1642 | ||
84fa4f43 JB |
1643 | /* All initial requests are respected */ |
1644 | if (!last_request) | |
1645 | return 0; | |
1646 | ||
2f92cd2e | 1647 | switch (pending_request->initiator) { |
7db90f4a | 1648 | case NL80211_REGDOM_SET_BY_CORE: |
ba25c141 | 1649 | return -EINVAL; |
7db90f4a | 1650 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
806a9e39 LR |
1651 | |
1652 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
1653 | ||
2f92cd2e | 1654 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1655 | return -EINVAL; |
7db90f4a LR |
1656 | if (last_request->initiator == |
1657 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
806a9e39 | 1658 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1659 | /* |
1660 | * Two cards with two APs claiming different | |
1fe90b03 | 1661 | * Country IE alpha2s. We could |
84fa4f43 JB |
1662 | * intersect them, but that seems unlikely |
1663 | * to be correct. Reject second one for now. | |
1664 | */ | |
2f92cd2e | 1665 | if (regdom_changes(pending_request->alpha2)) |
84fa4f43 JB |
1666 | return -EOPNOTSUPP; |
1667 | return -EALREADY; | |
1668 | } | |
fb1fc7ad LR |
1669 | /* |
1670 | * Two consecutive Country IE hints on the same wiphy. | |
1671 | * This should be picked up early by the driver/stack | |
1672 | */ | |
2f92cd2e | 1673 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
84fa4f43 JB |
1674 | return 0; |
1675 | return -EALREADY; | |
1676 | } | |
3f2355cb | 1677 | return REG_INTERSECT; |
7db90f4a LR |
1678 | case NL80211_REGDOM_SET_BY_DRIVER: |
1679 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
2f92cd2e | 1680 | if (regdom_changes(pending_request->alpha2)) |
e74b1e7f | 1681 | return 0; |
84fa4f43 | 1682 | return -EALREADY; |
e74b1e7f | 1683 | } |
fff32c04 LR |
1684 | |
1685 | /* | |
1686 | * This would happen if you unplug and plug your card | |
1687 | * back in or if you add a new device for which the previously | |
1688 | * loaded card also agrees on the regulatory domain. | |
1689 | */ | |
7db90f4a | 1690 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1691 | !regdom_changes(pending_request->alpha2)) |
fff32c04 LR |
1692 | return -EALREADY; |
1693 | ||
3e0c3ff3 | 1694 | return REG_INTERSECT; |
7db90f4a LR |
1695 | case NL80211_REGDOM_SET_BY_USER: |
1696 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
9c96477d | 1697 | return REG_INTERSECT; |
fb1fc7ad LR |
1698 | /* |
1699 | * If the user knows better the user should set the regdom | |
1700 | * to their country before the IE is picked up | |
1701 | */ | |
7db90f4a | 1702 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && |
3f2355cb LR |
1703 | last_request->intersect) |
1704 | return -EOPNOTSUPP; | |
fb1fc7ad LR |
1705 | /* |
1706 | * Process user requests only after previous user/driver/core | |
1707 | * requests have been processed | |
1708 | */ | |
7db90f4a LR |
1709 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || |
1710 | last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1711 | last_request->initiator == NL80211_REGDOM_SET_BY_USER) { | |
69b1572b | 1712 | if (regdom_changes(last_request->alpha2)) |
5eebade6 LR |
1713 | return -EAGAIN; |
1714 | } | |
1715 | ||
baeb66fe | 1716 | if (!regdom_changes(pending_request->alpha2)) |
e74b1e7f LR |
1717 | return -EALREADY; |
1718 | ||
84fa4f43 JB |
1719 | return 0; |
1720 | } | |
1721 | ||
1722 | return -EINVAL; | |
1723 | } | |
1724 | ||
d1c96a9a LR |
1725 | /** |
1726 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1727 | * @wiphy: if the hint comes from country information from an AP, this | |
1728 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1729 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1730 | * |
1731 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1732 | * what it believes should be the current regulatory domain. |
d1c96a9a LR |
1733 | * |
1734 | * Returns zero if all went fine, %-EALREADY if a regulatory domain had | |
1735 | * already been set or other standard error codes. | |
1736 | * | |
abc7381b | 1737 | * Caller must hold &cfg80211_mutex and ®_mutex |
d1c96a9a | 1738 | */ |
28da32d7 LR |
1739 | static int __regulatory_hint(struct wiphy *wiphy, |
1740 | struct regulatory_request *pending_request) | |
b2e1b302 | 1741 | { |
9c96477d | 1742 | bool intersect = false; |
b2e1b302 LR |
1743 | int r = 0; |
1744 | ||
761cf7ec LR |
1745 | assert_cfg80211_lock(); |
1746 | ||
2f92cd2e | 1747 | r = ignore_request(wiphy, pending_request); |
9c96477d | 1748 | |
3e0c3ff3 | 1749 | if (r == REG_INTERSECT) { |
7db90f4a LR |
1750 | if (pending_request->initiator == |
1751 | NL80211_REGDOM_SET_BY_DRIVER) { | |
3e0c3ff3 | 1752 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
d951c1dd LR |
1753 | if (r) { |
1754 | kfree(pending_request); | |
3e0c3ff3 | 1755 | return r; |
d951c1dd | 1756 | } |
3e0c3ff3 | 1757 | } |
9c96477d | 1758 | intersect = true; |
3e0c3ff3 | 1759 | } else if (r) { |
fb1fc7ad LR |
1760 | /* |
1761 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1762 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1763 | * wiphy |
1764 | */ | |
28da32d7 | 1765 | if (r == -EALREADY && |
7db90f4a LR |
1766 | pending_request->initiator == |
1767 | NL80211_REGDOM_SET_BY_DRIVER) { | |
3e0c3ff3 | 1768 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
d951c1dd LR |
1769 | if (r) { |
1770 | kfree(pending_request); | |
3e0c3ff3 | 1771 | return r; |
d951c1dd | 1772 | } |
3e0c3ff3 LR |
1773 | r = -EALREADY; |
1774 | goto new_request; | |
1775 | } | |
d951c1dd | 1776 | kfree(pending_request); |
b2e1b302 | 1777 | return r; |
3e0c3ff3 | 1778 | } |
b2e1b302 | 1779 | |
3e0c3ff3 | 1780 | new_request: |
d951c1dd | 1781 | kfree(last_request); |
5203cdb6 | 1782 | |
d951c1dd LR |
1783 | last_request = pending_request; |
1784 | last_request->intersect = intersect; | |
5203cdb6 | 1785 | |
d951c1dd | 1786 | pending_request = NULL; |
3e0c3ff3 LR |
1787 | |
1788 | /* When r == REG_INTERSECT we do need to call CRDA */ | |
73d54c9e LR |
1789 | if (r < 0) { |
1790 | /* | |
1791 | * Since CRDA will not be called in this case as we already | |
1792 | * have applied the requested regulatory domain before we just | |
1793 | * inform userspace we have processed the request | |
1794 | */ | |
1795 | if (r == -EALREADY) | |
1796 | nl80211_send_reg_change_event(last_request); | |
3e0c3ff3 | 1797 | return r; |
73d54c9e | 1798 | } |
3e0c3ff3 | 1799 | |
d951c1dd | 1800 | return call_crda(last_request->alpha2); |
b2e1b302 LR |
1801 | } |
1802 | ||
30a548c7 | 1803 | /* This processes *all* regulatory hints */ |
d951c1dd | 1804 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 LR |
1805 | { |
1806 | int r = 0; | |
1807 | struct wiphy *wiphy = NULL; | |
1808 | ||
1809 | BUG_ON(!reg_request->alpha2); | |
1810 | ||
1811 | mutex_lock(&cfg80211_mutex); | |
abc7381b | 1812 | mutex_lock(®_mutex); |
fe33eb39 LR |
1813 | |
1814 | if (wiphy_idx_valid(reg_request->wiphy_idx)) | |
1815 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); | |
1816 | ||
7db90f4a | 1817 | if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
fe33eb39 | 1818 | !wiphy) { |
d951c1dd | 1819 | kfree(reg_request); |
fe33eb39 LR |
1820 | goto out; |
1821 | } | |
1822 | ||
28da32d7 | 1823 | r = __regulatory_hint(wiphy, reg_request); |
fe33eb39 | 1824 | /* This is required so that the orig_* parameters are saved */ |
5be83de5 JB |
1825 | if (r == -EALREADY && wiphy && |
1826 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
fe33eb39 LR |
1827 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
1828 | out: | |
abc7381b | 1829 | mutex_unlock(®_mutex); |
fe33eb39 | 1830 | mutex_unlock(&cfg80211_mutex); |
fe33eb39 LR |
1831 | } |
1832 | ||
7db90f4a | 1833 | /* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */ |
fe33eb39 LR |
1834 | static void reg_process_pending_hints(void) |
1835 | { | |
1836 | struct regulatory_request *reg_request; | |
fe33eb39 LR |
1837 | |
1838 | spin_lock(®_requests_lock); | |
1839 | while (!list_empty(®_requests_list)) { | |
1840 | reg_request = list_first_entry(®_requests_list, | |
1841 | struct regulatory_request, | |
1842 | list); | |
1843 | list_del_init(®_request->list); | |
fe33eb39 | 1844 | |
d951c1dd LR |
1845 | spin_unlock(®_requests_lock); |
1846 | reg_process_hint(reg_request); | |
fe33eb39 LR |
1847 | spin_lock(®_requests_lock); |
1848 | } | |
1849 | spin_unlock(®_requests_lock); | |
1850 | } | |
1851 | ||
e38f8a7a LR |
1852 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1853 | static void reg_process_pending_beacon_hints(void) | |
1854 | { | |
79c97e97 | 1855 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1856 | struct reg_beacon *pending_beacon, *tmp; |
1857 | ||
abc7381b LR |
1858 | /* |
1859 | * No need to hold the reg_mutex here as we just touch wiphys | |
1860 | * and do not read or access regulatory variables. | |
1861 | */ | |
e38f8a7a LR |
1862 | mutex_lock(&cfg80211_mutex); |
1863 | ||
1864 | /* This goes through the _pending_ beacon list */ | |
1865 | spin_lock_bh(®_pending_beacons_lock); | |
1866 | ||
1867 | if (list_empty(®_pending_beacons)) { | |
1868 | spin_unlock_bh(®_pending_beacons_lock); | |
1869 | goto out; | |
1870 | } | |
1871 | ||
1872 | list_for_each_entry_safe(pending_beacon, tmp, | |
1873 | ®_pending_beacons, list) { | |
1874 | ||
1875 | list_del_init(&pending_beacon->list); | |
1876 | ||
1877 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1878 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1879 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1880 | |
1881 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1882 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1883 | } | |
1884 | ||
1885 | spin_unlock_bh(®_pending_beacons_lock); | |
1886 | out: | |
1887 | mutex_unlock(&cfg80211_mutex); | |
1888 | } | |
1889 | ||
fe33eb39 LR |
1890 | static void reg_todo(struct work_struct *work) |
1891 | { | |
1892 | reg_process_pending_hints(); | |
e38f8a7a | 1893 | reg_process_pending_beacon_hints(); |
fe33eb39 LR |
1894 | } |
1895 | ||
1896 | static DECLARE_WORK(reg_work, reg_todo); | |
1897 | ||
1898 | static void queue_regulatory_request(struct regulatory_request *request) | |
1899 | { | |
1900 | spin_lock(®_requests_lock); | |
1901 | list_add_tail(&request->list, ®_requests_list); | |
1902 | spin_unlock(®_requests_lock); | |
1903 | ||
1904 | schedule_work(®_work); | |
1905 | } | |
1906 | ||
1907 | /* Core regulatory hint -- happens once during cfg80211_init() */ | |
ba25c141 LR |
1908 | static int regulatory_hint_core(const char *alpha2) |
1909 | { | |
1910 | struct regulatory_request *request; | |
1911 | ||
1912 | BUG_ON(last_request); | |
1913 | ||
1914 | request = kzalloc(sizeof(struct regulatory_request), | |
1915 | GFP_KERNEL); | |
1916 | if (!request) | |
1917 | return -ENOMEM; | |
1918 | ||
1919 | request->alpha2[0] = alpha2[0]; | |
1920 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1921 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1922 | |
5078b2e3 LR |
1923 | /* |
1924 | * This ensures last_request is populated once modules | |
1925 | * come swinging in and calling regulatory hints and | |
1926 | * wiphy_apply_custom_regulatory(). | |
1927 | */ | |
a2bff269 | 1928 | reg_process_hint(request); |
5078b2e3 | 1929 | |
fe33eb39 | 1930 | return 0; |
ba25c141 LR |
1931 | } |
1932 | ||
fe33eb39 LR |
1933 | /* User hints */ |
1934 | int regulatory_hint_user(const char *alpha2) | |
b2e1b302 | 1935 | { |
fe33eb39 LR |
1936 | struct regulatory_request *request; |
1937 | ||
be3d4810 | 1938 | BUG_ON(!alpha2); |
b2e1b302 | 1939 | |
fe33eb39 LR |
1940 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1941 | if (!request) | |
1942 | return -ENOMEM; | |
1943 | ||
1944 | request->wiphy_idx = WIPHY_IDX_STALE; | |
1945 | request->alpha2[0] = alpha2[0]; | |
1946 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1947 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
fe33eb39 LR |
1948 | |
1949 | queue_regulatory_request(request); | |
1950 | ||
1951 | return 0; | |
1952 | } | |
1953 | ||
1954 | /* Driver hints */ | |
1955 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1956 | { | |
1957 | struct regulatory_request *request; | |
1958 | ||
1959 | BUG_ON(!alpha2); | |
1960 | BUG_ON(!wiphy); | |
1961 | ||
1962 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1963 | if (!request) | |
1964 | return -ENOMEM; | |
1965 | ||
1966 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1967 | ||
1968 | /* Must have registered wiphy first */ | |
1969 | BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); | |
1970 | ||
1971 | request->alpha2[0] = alpha2[0]; | |
1972 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1973 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1974 | |
1975 | queue_regulatory_request(request); | |
1976 | ||
1977 | return 0; | |
b2e1b302 LR |
1978 | } |
1979 | EXPORT_SYMBOL(regulatory_hint); | |
1980 | ||
abc7381b | 1981 | /* Caller must hold reg_mutex */ |
3f2355cb LR |
1982 | static bool reg_same_country_ie_hint(struct wiphy *wiphy, |
1983 | u32 country_ie_checksum) | |
1984 | { | |
806a9e39 LR |
1985 | struct wiphy *request_wiphy; |
1986 | ||
abc7381b | 1987 | assert_reg_lock(); |
761cf7ec | 1988 | |
cc0b6fe8 LR |
1989 | if (unlikely(last_request->initiator != |
1990 | NL80211_REGDOM_SET_BY_COUNTRY_IE)) | |
1991 | return false; | |
1992 | ||
806a9e39 LR |
1993 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
1994 | ||
1995 | if (!request_wiphy) | |
3f2355cb | 1996 | return false; |
806a9e39 LR |
1997 | |
1998 | if (likely(request_wiphy != wiphy)) | |
3f2355cb | 1999 | return !country_ie_integrity_changes(country_ie_checksum); |
fb1fc7ad LR |
2000 | /* |
2001 | * We should not have let these through at this point, they | |
3f2355cb | 2002 | * should have been picked up earlier by the first alpha2 check |
fb1fc7ad LR |
2003 | * on the device |
2004 | */ | |
3f2355cb LR |
2005 | if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) |
2006 | return true; | |
2007 | return false; | |
2008 | } | |
2009 | ||
4b44c8bc LR |
2010 | /* |
2011 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and | |
2012 | * therefore cannot iterate over the rdev list here. | |
2013 | */ | |
3f2355cb | 2014 | void regulatory_hint_11d(struct wiphy *wiphy, |
84920e3e LR |
2015 | enum ieee80211_band band, |
2016 | u8 *country_ie, | |
2017 | u8 country_ie_len) | |
3f2355cb LR |
2018 | { |
2019 | struct ieee80211_regdomain *rd = NULL; | |
2020 | char alpha2[2]; | |
2021 | u32 checksum = 0; | |
2022 | enum environment_cap env = ENVIRON_ANY; | |
fe33eb39 | 2023 | struct regulatory_request *request; |
3f2355cb | 2024 | |
abc7381b | 2025 | mutex_lock(®_mutex); |
3f2355cb | 2026 | |
9828b017 LR |
2027 | if (unlikely(!last_request)) |
2028 | goto out; | |
d335fe63 | 2029 | |
3f2355cb LR |
2030 | /* IE len must be evenly divisible by 2 */ |
2031 | if (country_ie_len & 0x01) | |
2032 | goto out; | |
2033 | ||
2034 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
2035 | goto out; | |
2036 | ||
fb1fc7ad LR |
2037 | /* |
2038 | * Pending country IE processing, this can happen after we | |
3f2355cb | 2039 | * call CRDA and wait for a response if a beacon was received before |
fb1fc7ad LR |
2040 | * we were able to process the last regulatory_hint_11d() call |
2041 | */ | |
3f2355cb LR |
2042 | if (country_ie_regdomain) |
2043 | goto out; | |
2044 | ||
2045 | alpha2[0] = country_ie[0]; | |
2046 | alpha2[1] = country_ie[1]; | |
2047 | ||
2048 | if (country_ie[2] == 'I') | |
2049 | env = ENVIRON_INDOOR; | |
2050 | else if (country_ie[2] == 'O') | |
2051 | env = ENVIRON_OUTDOOR; | |
2052 | ||
fb1fc7ad | 2053 | /* |
8b19e6ca | 2054 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc LR |
2055 | * We leave conflict resolution to the workqueue, where can hold |
2056 | * cfg80211_mutex. | |
fb1fc7ad | 2057 | */ |
cc0b6fe8 LR |
2058 | if (likely(last_request->initiator == |
2059 | NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
4b44c8bc LR |
2060 | wiphy_idx_valid(last_request->wiphy_idx))) |
2061 | goto out; | |
3f2355cb | 2062 | |
84920e3e | 2063 | rd = country_ie_2_rd(band, country_ie, country_ie_len, &checksum); |
b74d12e1 LR |
2064 | if (!rd) { |
2065 | REG_DBG_PRINT("cfg80211: Ignoring bogus country IE\n"); | |
3f2355cb | 2066 | goto out; |
b74d12e1 | 2067 | } |
3f2355cb | 2068 | |
915278e0 LR |
2069 | /* |
2070 | * This will not happen right now but we leave it here for the | |
3f2355cb LR |
2071 | * the future when we want to add suspend/resume support and having |
2072 | * the user move to another country after doing so, or having the user | |
915278e0 LR |
2073 | * move to another AP. Right now we just trust the first AP. |
2074 | * | |
2075 | * If we hit this before we add this support we want to be informed of | |
2076 | * it as it would indicate a mistake in the current design | |
2077 | */ | |
2078 | if (WARN_ON(reg_same_country_ie_hint(wiphy, checksum))) | |
0441d6ff | 2079 | goto free_rd_out; |
3f2355cb | 2080 | |
fe33eb39 LR |
2081 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2082 | if (!request) | |
2083 | goto free_rd_out; | |
2084 | ||
fb1fc7ad LR |
2085 | /* |
2086 | * We keep this around for when CRDA comes back with a response so | |
2087 | * we can intersect with that | |
2088 | */ | |
3f2355cb LR |
2089 | country_ie_regdomain = rd; |
2090 | ||
fe33eb39 LR |
2091 | request->wiphy_idx = get_wiphy_idx(wiphy); |
2092 | request->alpha2[0] = rd->alpha2[0]; | |
2093 | request->alpha2[1] = rd->alpha2[1]; | |
7db90f4a | 2094 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2095 | request->country_ie_checksum = checksum; |
2096 | request->country_ie_env = env; | |
2097 | ||
abc7381b | 2098 | mutex_unlock(®_mutex); |
3f2355cb | 2099 | |
fe33eb39 LR |
2100 | queue_regulatory_request(request); |
2101 | ||
2102 | return; | |
0441d6ff LR |
2103 | |
2104 | free_rd_out: | |
2105 | kfree(rd); | |
3f2355cb | 2106 | out: |
abc7381b | 2107 | mutex_unlock(®_mutex); |
3f2355cb | 2108 | } |
b2e1b302 | 2109 | |
e38f8a7a LR |
2110 | static bool freq_is_chan_12_13_14(u16 freq) |
2111 | { | |
2112 | if (freq == ieee80211_channel_to_frequency(12) || | |
2113 | freq == ieee80211_channel_to_frequency(13) || | |
2114 | freq == ieee80211_channel_to_frequency(14)) | |
2115 | return true; | |
2116 | return false; | |
2117 | } | |
2118 | ||
2119 | int regulatory_hint_found_beacon(struct wiphy *wiphy, | |
2120 | struct ieee80211_channel *beacon_chan, | |
2121 | gfp_t gfp) | |
2122 | { | |
2123 | struct reg_beacon *reg_beacon; | |
2124 | ||
2125 | if (likely((beacon_chan->beacon_found || | |
2126 | (beacon_chan->flags & IEEE80211_CHAN_RADAR) || | |
2127 | (beacon_chan->band == IEEE80211_BAND_2GHZ && | |
2128 | !freq_is_chan_12_13_14(beacon_chan->center_freq))))) | |
2129 | return 0; | |
2130 | ||
2131 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2132 | if (!reg_beacon) | |
2133 | return -ENOMEM; | |
2134 | ||
4113f751 LR |
2135 | REG_DBG_PRINT("cfg80211: Found new beacon on " |
2136 | "frequency: %d MHz (Ch %d) on %s\n", | |
2137 | beacon_chan->center_freq, | |
2138 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2139 | wiphy_name(wiphy)); | |
2140 | ||
e38f8a7a LR |
2141 | memcpy(®_beacon->chan, beacon_chan, |
2142 | sizeof(struct ieee80211_channel)); | |
2143 | ||
2144 | ||
2145 | /* | |
2146 | * Since we can be called from BH or and non-BH context | |
2147 | * we must use spin_lock_bh() | |
2148 | */ | |
2149 | spin_lock_bh(®_pending_beacons_lock); | |
2150 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2151 | spin_unlock_bh(®_pending_beacons_lock); | |
2152 | ||
2153 | schedule_work(®_work); | |
2154 | ||
2155 | return 0; | |
2156 | } | |
2157 | ||
a3d2eaf0 | 2158 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2159 | { |
2160 | unsigned int i; | |
a3d2eaf0 JB |
2161 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2162 | const struct ieee80211_freq_range *freq_range = NULL; | |
2163 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 2164 | |
269ac5fd | 2165 | printk(KERN_INFO " (start_freq - end_freq @ bandwidth), " |
b2e1b302 LR |
2166 | "(max_antenna_gain, max_eirp)\n"); |
2167 | ||
2168 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2169 | reg_rule = &rd->reg_rules[i]; | |
2170 | freq_range = ®_rule->freq_range; | |
2171 | power_rule = ®_rule->power_rule; | |
2172 | ||
fb1fc7ad LR |
2173 | /* |
2174 | * There may not be documentation for max antenna gain | |
2175 | * in certain regions | |
2176 | */ | |
b2e1b302 | 2177 | if (power_rule->max_antenna_gain) |
269ac5fd | 2178 | printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " |
b2e1b302 LR |
2179 | "(%d mBi, %d mBm)\n", |
2180 | freq_range->start_freq_khz, | |
2181 | freq_range->end_freq_khz, | |
2182 | freq_range->max_bandwidth_khz, | |
2183 | power_rule->max_antenna_gain, | |
2184 | power_rule->max_eirp); | |
2185 | else | |
269ac5fd | 2186 | printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " |
b2e1b302 LR |
2187 | "(N/A, %d mBm)\n", |
2188 | freq_range->start_freq_khz, | |
2189 | freq_range->end_freq_khz, | |
2190 | freq_range->max_bandwidth_khz, | |
2191 | power_rule->max_eirp); | |
2192 | } | |
2193 | } | |
2194 | ||
a3d2eaf0 | 2195 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2196 | { |
2197 | ||
3f2355cb | 2198 | if (is_intersected_alpha2(rd->alpha2)) { |
3f2355cb | 2199 | |
7db90f4a LR |
2200 | if (last_request->initiator == |
2201 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
79c97e97 JB |
2202 | struct cfg80211_registered_device *rdev; |
2203 | rdev = cfg80211_rdev_by_wiphy_idx( | |
806a9e39 | 2204 | last_request->wiphy_idx); |
79c97e97 | 2205 | if (rdev) { |
3f2355cb LR |
2206 | printk(KERN_INFO "cfg80211: Current regulatory " |
2207 | "domain updated by AP to: %c%c\n", | |
79c97e97 JB |
2208 | rdev->country_ie_alpha2[0], |
2209 | rdev->country_ie_alpha2[1]); | |
3f2355cb LR |
2210 | } else |
2211 | printk(KERN_INFO "cfg80211: Current regulatory " | |
2212 | "domain intersected: \n"); | |
2213 | } else | |
2214 | printk(KERN_INFO "cfg80211: Current regulatory " | |
039498c6 | 2215 | "domain intersected: \n"); |
3f2355cb | 2216 | } else if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2217 | printk(KERN_INFO "cfg80211: World regulatory " |
2218 | "domain updated:\n"); | |
2219 | else { | |
2220 | if (is_unknown_alpha2(rd->alpha2)) | |
2221 | printk(KERN_INFO "cfg80211: Regulatory domain " | |
2222 | "changed to driver built-in settings " | |
2223 | "(unknown country)\n"); | |
2224 | else | |
2225 | printk(KERN_INFO "cfg80211: Regulatory domain " | |
2226 | "changed to country: %c%c\n", | |
2227 | rd->alpha2[0], rd->alpha2[1]); | |
2228 | } | |
2229 | print_rd_rules(rd); | |
2230 | } | |
2231 | ||
2df78167 | 2232 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2233 | { |
2234 | printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", | |
2235 | rd->alpha2[0], rd->alpha2[1]); | |
2236 | print_rd_rules(rd); | |
2237 | } | |
2238 | ||
3f2355cb LR |
2239 | #ifdef CONFIG_CFG80211_REG_DEBUG |
2240 | static void reg_country_ie_process_debug( | |
2241 | const struct ieee80211_regdomain *rd, | |
2242 | const struct ieee80211_regdomain *country_ie_regdomain, | |
2243 | const struct ieee80211_regdomain *intersected_rd) | |
2244 | { | |
2245 | printk(KERN_DEBUG "cfg80211: Received country IE:\n"); | |
2246 | print_regdomain_info(country_ie_regdomain); | |
2247 | printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); | |
2248 | print_regdomain_info(rd); | |
2249 | if (intersected_rd) { | |
2250 | printk(KERN_DEBUG "cfg80211: We intersect both of these " | |
2251 | "and get:\n"); | |
667ecd01 | 2252 | print_regdomain_info(intersected_rd); |
3f2355cb LR |
2253 | return; |
2254 | } | |
2255 | printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); | |
2256 | } | |
2257 | #else | |
2258 | static inline void reg_country_ie_process_debug( | |
2259 | const struct ieee80211_regdomain *rd, | |
2260 | const struct ieee80211_regdomain *country_ie_regdomain, | |
2261 | const struct ieee80211_regdomain *intersected_rd) | |
2262 | { | |
2263 | } | |
2264 | #endif | |
2265 | ||
d2372b31 | 2266 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 2267 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2268 | { |
9c96477d | 2269 | const struct ieee80211_regdomain *intersected_rd = NULL; |
79c97e97 | 2270 | struct cfg80211_registered_device *rdev = NULL; |
806a9e39 | 2271 | struct wiphy *request_wiphy; |
b2e1b302 LR |
2272 | /* Some basic sanity checks first */ |
2273 | ||
b2e1b302 | 2274 | if (is_world_regdom(rd->alpha2)) { |
f6037d09 | 2275 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
2276 | return -EINVAL; |
2277 | update_world_regdomain(rd); | |
2278 | return 0; | |
2279 | } | |
b2e1b302 LR |
2280 | |
2281 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
2282 | !is_unknown_alpha2(rd->alpha2)) | |
2283 | return -EINVAL; | |
2284 | ||
f6037d09 | 2285 | if (!last_request) |
b2e1b302 LR |
2286 | return -EINVAL; |
2287 | ||
fb1fc7ad LR |
2288 | /* |
2289 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 2290 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
2291 | * and the pending request came in from a country IE |
2292 | */ | |
7db90f4a | 2293 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
2294 | /* |
2295 | * If someone else asked us to change the rd lets only bother | |
2296 | * checking if the alpha2 changes if CRDA was already called | |
2297 | */ | |
baeb66fe | 2298 | if (!regdom_changes(rd->alpha2)) |
3f2355cb LR |
2299 | return -EINVAL; |
2300 | } | |
2301 | ||
fb1fc7ad LR |
2302 | /* |
2303 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
2304 | * and finally inform them of what we have done, in case they want |
2305 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
2306 | * internal EEPROM data |
2307 | */ | |
b2e1b302 | 2308 | |
f6037d09 | 2309 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
2310 | return -EINVAL; |
2311 | ||
8375af3b LR |
2312 | if (!is_valid_rd(rd)) { |
2313 | printk(KERN_ERR "cfg80211: Invalid " | |
2314 | "regulatory domain detected:\n"); | |
2315 | print_regdomain_info(rd); | |
2316 | return -EINVAL; | |
b2e1b302 LR |
2317 | } |
2318 | ||
806a9e39 LR |
2319 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
2320 | ||
b8295acd | 2321 | if (!last_request->intersect) { |
3e0c3ff3 LR |
2322 | int r; |
2323 | ||
7db90f4a | 2324 | if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { |
3e0c3ff3 LR |
2325 | reset_regdomains(); |
2326 | cfg80211_regdomain = rd; | |
2327 | return 0; | |
2328 | } | |
2329 | ||
fb1fc7ad LR |
2330 | /* |
2331 | * For a driver hint, lets copy the regulatory domain the | |
2332 | * driver wanted to the wiphy to deal with conflicts | |
2333 | */ | |
3e0c3ff3 | 2334 | |
558f6d32 LR |
2335 | /* |
2336 | * Userspace could have sent two replies with only | |
2337 | * one kernel request. | |
2338 | */ | |
2339 | if (request_wiphy->regd) | |
2340 | return -EALREADY; | |
3e0c3ff3 | 2341 | |
806a9e39 | 2342 | r = reg_copy_regd(&request_wiphy->regd, rd); |
3e0c3ff3 LR |
2343 | if (r) |
2344 | return r; | |
2345 | ||
b8295acd LR |
2346 | reset_regdomains(); |
2347 | cfg80211_regdomain = rd; | |
2348 | return 0; | |
2349 | } | |
2350 | ||
2351 | /* Intersection requires a bit more work */ | |
2352 | ||
7db90f4a | 2353 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
b8295acd | 2354 | |
9c96477d LR |
2355 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
2356 | if (!intersected_rd) | |
2357 | return -EINVAL; | |
b8295acd | 2358 | |
fb1fc7ad LR |
2359 | /* |
2360 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 2361 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
2362 | * domain we keep it for its private use |
2363 | */ | |
7db90f4a | 2364 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) |
806a9e39 | 2365 | request_wiphy->regd = rd; |
3e0c3ff3 LR |
2366 | else |
2367 | kfree(rd); | |
2368 | ||
b8295acd LR |
2369 | rd = NULL; |
2370 | ||
2371 | reset_regdomains(); | |
2372 | cfg80211_regdomain = intersected_rd; | |
2373 | ||
2374 | return 0; | |
9c96477d LR |
2375 | } |
2376 | ||
3f2355cb LR |
2377 | /* |
2378 | * Country IE requests are handled a bit differently, we intersect | |
2379 | * the country IE rd with what CRDA believes that country should have | |
2380 | */ | |
2381 | ||
729e9c76 LR |
2382 | /* |
2383 | * Userspace could have sent two replies with only | |
2384 | * one kernel request. By the second reply we would have | |
2385 | * already processed and consumed the country_ie_regdomain. | |
2386 | */ | |
2387 | if (!country_ie_regdomain) | |
2388 | return -EALREADY; | |
86f04680 | 2389 | BUG_ON(rd == country_ie_regdomain); |
3f2355cb | 2390 | |
86f04680 LR |
2391 | /* |
2392 | * Intersect what CRDA returned and our what we | |
2393 | * had built from the Country IE received | |
2394 | */ | |
3f2355cb | 2395 | |
86f04680 | 2396 | intersected_rd = regdom_intersect(rd, country_ie_regdomain); |
3f2355cb | 2397 | |
86f04680 LR |
2398 | reg_country_ie_process_debug(rd, |
2399 | country_ie_regdomain, | |
2400 | intersected_rd); | |
3f2355cb | 2401 | |
86f04680 LR |
2402 | kfree(country_ie_regdomain); |
2403 | country_ie_regdomain = NULL; | |
3f2355cb LR |
2404 | |
2405 | if (!intersected_rd) | |
2406 | return -EINVAL; | |
2407 | ||
79c97e97 | 2408 | rdev = wiphy_to_dev(request_wiphy); |
3f2355cb | 2409 | |
79c97e97 JB |
2410 | rdev->country_ie_alpha2[0] = rd->alpha2[0]; |
2411 | rdev->country_ie_alpha2[1] = rd->alpha2[1]; | |
2412 | rdev->env = last_request->country_ie_env; | |
3f2355cb LR |
2413 | |
2414 | BUG_ON(intersected_rd == rd); | |
2415 | ||
2416 | kfree(rd); | |
2417 | rd = NULL; | |
2418 | ||
b8295acd | 2419 | reset_regdomains(); |
3f2355cb | 2420 | cfg80211_regdomain = intersected_rd; |
b2e1b302 LR |
2421 | |
2422 | return 0; | |
2423 | } | |
2424 | ||
2425 | ||
fb1fc7ad LR |
2426 | /* |
2427 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2428 | * multiple drivers can be ironed out later. Caller must've already |
fb1fc7ad LR |
2429 | * kmalloc'd the rd structure. Caller must hold cfg80211_mutex |
2430 | */ | |
a3d2eaf0 | 2431 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2432 | { |
b2e1b302 LR |
2433 | int r; |
2434 | ||
761cf7ec LR |
2435 | assert_cfg80211_lock(); |
2436 | ||
abc7381b LR |
2437 | mutex_lock(®_mutex); |
2438 | ||
b2e1b302 LR |
2439 | /* Note that this doesn't update the wiphys, this is done below */ |
2440 | r = __set_regdom(rd); | |
d2372b31 JB |
2441 | if (r) { |
2442 | kfree(rd); | |
abc7381b | 2443 | mutex_unlock(®_mutex); |
b2e1b302 | 2444 | return r; |
d2372b31 | 2445 | } |
b2e1b302 | 2446 | |
b2e1b302 | 2447 | /* This would make this whole thing pointless */ |
a01ddafd LR |
2448 | if (!last_request->intersect) |
2449 | BUG_ON(rd != cfg80211_regdomain); | |
b2e1b302 LR |
2450 | |
2451 | /* update all wiphys now with the new established regulatory domain */ | |
f6037d09 | 2452 | update_all_wiphy_regulatory(last_request->initiator); |
b2e1b302 | 2453 | |
a01ddafd | 2454 | print_regdomain(cfg80211_regdomain); |
b2e1b302 | 2455 | |
73d54c9e LR |
2456 | nl80211_send_reg_change_event(last_request); |
2457 | ||
abc7381b LR |
2458 | mutex_unlock(®_mutex); |
2459 | ||
b2e1b302 LR |
2460 | return r; |
2461 | } | |
2462 | ||
a1794390 | 2463 | /* Caller must hold cfg80211_mutex */ |
3f2355cb LR |
2464 | void reg_device_remove(struct wiphy *wiphy) |
2465 | { | |
0ad8acaf | 2466 | struct wiphy *request_wiphy = NULL; |
806a9e39 | 2467 | |
761cf7ec LR |
2468 | assert_cfg80211_lock(); |
2469 | ||
abc7381b LR |
2470 | mutex_lock(®_mutex); |
2471 | ||
0ef9ccdd CW |
2472 | kfree(wiphy->regd); |
2473 | ||
0ad8acaf LR |
2474 | if (last_request) |
2475 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
806a9e39 | 2476 | |
0ef9ccdd | 2477 | if (!request_wiphy || request_wiphy != wiphy) |
abc7381b | 2478 | goto out; |
0ef9ccdd | 2479 | |
806a9e39 | 2480 | last_request->wiphy_idx = WIPHY_IDX_STALE; |
3f2355cb | 2481 | last_request->country_ie_env = ENVIRON_ANY; |
abc7381b LR |
2482 | out: |
2483 | mutex_unlock(®_mutex); | |
3f2355cb LR |
2484 | } |
2485 | ||
b2e1b302 LR |
2486 | int regulatory_init(void) |
2487 | { | |
bcf4f99b | 2488 | int err = 0; |
734366de | 2489 | |
b2e1b302 LR |
2490 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2491 | if (IS_ERR(reg_pdev)) | |
2492 | return PTR_ERR(reg_pdev); | |
734366de | 2493 | |
fe33eb39 | 2494 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2495 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2496 | |
a3d2eaf0 | 2497 | cfg80211_regdomain = cfg80211_world_regdom; |
734366de | 2498 | |
ae9e4b0d LR |
2499 | /* We always try to get an update for the static regdomain */ |
2500 | err = regulatory_hint_core(cfg80211_regdomain->alpha2); | |
ba25c141 | 2501 | if (err) { |
bcf4f99b LR |
2502 | if (err == -ENOMEM) |
2503 | return err; | |
2504 | /* | |
2505 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2506 | * memory which is handled and propagated appropriately above | |
2507 | * but it can also fail during a netlink_broadcast() or during | |
2508 | * early boot for call_usermodehelper(). For now treat these | |
2509 | * errors as non-fatal. | |
2510 | */ | |
2511 | printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " | |
2512 | "to call CRDA during init"); | |
2513 | #ifdef CONFIG_CFG80211_REG_DEBUG | |
2514 | /* We want to find out exactly why when debugging */ | |
2515 | WARN_ON(err); | |
734366de | 2516 | #endif |
bcf4f99b | 2517 | } |
734366de | 2518 | |
ae9e4b0d LR |
2519 | /* |
2520 | * Finally, if the user set the module parameter treat it | |
2521 | * as a user hint. | |
2522 | */ | |
2523 | if (!is_world_regdom(ieee80211_regdom)) | |
2524 | regulatory_hint_user(ieee80211_regdom); | |
2525 | ||
b2e1b302 LR |
2526 | return 0; |
2527 | } | |
2528 | ||
2529 | void regulatory_exit(void) | |
2530 | { | |
fe33eb39 | 2531 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2532 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2533 | |
2534 | cancel_work_sync(®_work); | |
2535 | ||
a1794390 | 2536 | mutex_lock(&cfg80211_mutex); |
abc7381b | 2537 | mutex_lock(®_mutex); |
734366de | 2538 | |
b2e1b302 | 2539 | reset_regdomains(); |
734366de | 2540 | |
3f2355cb LR |
2541 | kfree(country_ie_regdomain); |
2542 | country_ie_regdomain = NULL; | |
2543 | ||
f6037d09 JB |
2544 | kfree(last_request); |
2545 | ||
b2e1b302 | 2546 | platform_device_unregister(reg_pdev); |
734366de | 2547 | |
e38f8a7a LR |
2548 | spin_lock_bh(®_pending_beacons_lock); |
2549 | if (!list_empty(®_pending_beacons)) { | |
2550 | list_for_each_entry_safe(reg_beacon, btmp, | |
2551 | ®_pending_beacons, list) { | |
2552 | list_del(®_beacon->list); | |
2553 | kfree(reg_beacon); | |
2554 | } | |
2555 | } | |
2556 | spin_unlock_bh(®_pending_beacons_lock); | |
2557 | ||
2558 | if (!list_empty(®_beacon_list)) { | |
2559 | list_for_each_entry_safe(reg_beacon, btmp, | |
2560 | ®_beacon_list, list) { | |
2561 | list_del(®_beacon->list); | |
2562 | kfree(reg_beacon); | |
2563 | } | |
2564 | } | |
2565 | ||
fe33eb39 LR |
2566 | spin_lock(®_requests_lock); |
2567 | if (!list_empty(®_requests_list)) { | |
2568 | list_for_each_entry_safe(reg_request, tmp, | |
2569 | ®_requests_list, list) { | |
2570 | list_del(®_request->list); | |
2571 | kfree(reg_request); | |
2572 | } | |
2573 | } | |
2574 | spin_unlock(®_requests_lock); | |
2575 | ||
abc7381b | 2576 | mutex_unlock(®_mutex); |
a1794390 | 2577 | mutex_unlock(&cfg80211_mutex); |
8318d78a | 2578 | } |