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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> | |
8318d78a | 40 | #include <net/wireless.h> |
b2e1b302 | 41 | #include <net/cfg80211.h> |
8318d78a | 42 | #include "core.h" |
b2e1b302 | 43 | #include "reg.h" |
8318d78a | 44 | |
5166ccd2 | 45 | /* Receipt of information from last regulatory request */ |
f6037d09 | 46 | static struct regulatory_request *last_request; |
734366de | 47 | |
b2e1b302 LR |
48 | /* To trigger userspace events */ |
49 | static struct platform_device *reg_pdev; | |
8318d78a | 50 | |
b2e1b302 LR |
51 | /* Keep the ordering from large to small */ |
52 | static u32 supported_bandwidths[] = { | |
53 | MHZ_TO_KHZ(40), | |
54 | MHZ_TO_KHZ(20), | |
8318d78a JB |
55 | }; |
56 | ||
fb1fc7ad LR |
57 | /* |
58 | * Central wireless core regulatory domains, we only need two, | |
734366de | 59 | * the current one and a world regulatory domain in case we have no |
fb1fc7ad LR |
60 | * information to give us an alpha2 |
61 | */ | |
f130347c | 62 | const struct ieee80211_regdomain *cfg80211_regdomain; |
734366de | 63 | |
fb1fc7ad LR |
64 | /* |
65 | * We use this as a place for the rd structure built from the | |
3f2355cb | 66 | * last parsed country IE to rest until CRDA gets back to us with |
fb1fc7ad LR |
67 | * what it thinks should apply for the same country |
68 | */ | |
3f2355cb LR |
69 | static const struct ieee80211_regdomain *country_ie_regdomain; |
70 | ||
e38f8a7a | 71 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
72 | static LIST_HEAD(reg_requests_list); |
73 | static spinlock_t reg_requests_lock; | |
74 | ||
e38f8a7a LR |
75 | /* Used to queue up beacon hints for review */ |
76 | static LIST_HEAD(reg_pending_beacons); | |
77 | static spinlock_t reg_pending_beacons_lock; | |
78 | ||
79 | /* Used to keep track of processed beacon hints */ | |
80 | static LIST_HEAD(reg_beacon_list); | |
81 | ||
82 | struct reg_beacon { | |
83 | struct list_head list; | |
84 | struct ieee80211_channel chan; | |
85 | }; | |
86 | ||
734366de JB |
87 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
88 | static const struct ieee80211_regdomain world_regdom = { | |
611b6a82 | 89 | .n_reg_rules = 5, |
734366de JB |
90 | .alpha2 = "00", |
91 | .reg_rules = { | |
68798a62 LR |
92 | /* IEEE 802.11b/g, channels 1..11 */ |
93 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
611b6a82 LR |
94 | /* IEEE 802.11b/g, channels 12..13. No HT40 |
95 | * channel fits here. */ | |
96 | REG_RULE(2467-10, 2472+10, 20, 6, 20, | |
3fc71f77 LR |
97 | NL80211_RRF_PASSIVE_SCAN | |
98 | NL80211_RRF_NO_IBSS), | |
611b6a82 LR |
99 | /* IEEE 802.11 channel 14 - Only JP enables |
100 | * this and for 802.11b only */ | |
101 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
102 | NL80211_RRF_PASSIVE_SCAN | | |
103 | NL80211_RRF_NO_IBSS | | |
104 | NL80211_RRF_NO_OFDM), | |
105 | /* IEEE 802.11a, channel 36..48 */ | |
106 | REG_RULE(5180-10, 5240+10, 40, 6, 23, | |
107 | NL80211_RRF_PASSIVE_SCAN | | |
108 | NL80211_RRF_NO_IBSS), | |
3fc71f77 LR |
109 | |
110 | /* NB: 5260 MHz - 5700 MHz requies DFS */ | |
111 | ||
112 | /* IEEE 802.11a, channel 149..165 */ | |
113 | REG_RULE(5745-10, 5825+10, 40, 6, 23, | |
114 | NL80211_RRF_PASSIVE_SCAN | | |
115 | NL80211_RRF_NO_IBSS), | |
734366de JB |
116 | } |
117 | }; | |
118 | ||
a3d2eaf0 JB |
119 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
120 | &world_regdom; | |
734366de JB |
121 | |
122 | #ifdef CONFIG_WIRELESS_OLD_REGULATORY | |
123 | static char *ieee80211_regdom = "US"; | |
124 | module_param(ieee80211_regdom, charp, 0444); | |
125 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
126 | ||
fb1fc7ad LR |
127 | /* |
128 | * We assume 40 MHz bandwidth for the old regulatory work. | |
734366de | 129 | * We make emphasis we are using the exact same frequencies |
fb1fc7ad LR |
130 | * as before |
131 | */ | |
734366de JB |
132 | |
133 | static const struct ieee80211_regdomain us_regdom = { | |
134 | .n_reg_rules = 6, | |
135 | .alpha2 = "US", | |
136 | .reg_rules = { | |
137 | /* IEEE 802.11b/g, channels 1..11 */ | |
138 | REG_RULE(2412-10, 2462+10, 40, 6, 27, 0), | |
139 | /* IEEE 802.11a, channel 36 */ | |
140 | REG_RULE(5180-10, 5180+10, 40, 6, 23, 0), | |
141 | /* IEEE 802.11a, channel 40 */ | |
142 | REG_RULE(5200-10, 5200+10, 40, 6, 23, 0), | |
143 | /* IEEE 802.11a, channel 44 */ | |
144 | REG_RULE(5220-10, 5220+10, 40, 6, 23, 0), | |
145 | /* IEEE 802.11a, channels 48..64 */ | |
146 | REG_RULE(5240-10, 5320+10, 40, 6, 23, 0), | |
147 | /* IEEE 802.11a, channels 149..165, outdoor */ | |
148 | REG_RULE(5745-10, 5825+10, 40, 6, 30, 0), | |
149 | } | |
150 | }; | |
151 | ||
152 | static const struct ieee80211_regdomain jp_regdom = { | |
153 | .n_reg_rules = 3, | |
154 | .alpha2 = "JP", | |
155 | .reg_rules = { | |
156 | /* IEEE 802.11b/g, channels 1..14 */ | |
157 | REG_RULE(2412-10, 2484+10, 40, 6, 20, 0), | |
158 | /* IEEE 802.11a, channels 34..48 */ | |
159 | REG_RULE(5170-10, 5240+10, 40, 6, 20, | |
160 | NL80211_RRF_PASSIVE_SCAN), | |
161 | /* IEEE 802.11a, channels 52..64 */ | |
162 | REG_RULE(5260-10, 5320+10, 40, 6, 20, | |
163 | NL80211_RRF_NO_IBSS | | |
164 | NL80211_RRF_DFS), | |
165 | } | |
166 | }; | |
167 | ||
168 | static const struct ieee80211_regdomain eu_regdom = { | |
169 | .n_reg_rules = 6, | |
fb1fc7ad LR |
170 | /* |
171 | * This alpha2 is bogus, we leave it here just for stupid | |
172 | * backward compatibility | |
173 | */ | |
734366de JB |
174 | .alpha2 = "EU", |
175 | .reg_rules = { | |
176 | /* IEEE 802.11b/g, channels 1..13 */ | |
177 | REG_RULE(2412-10, 2472+10, 40, 6, 20, 0), | |
178 | /* IEEE 802.11a, channel 36 */ | |
179 | REG_RULE(5180-10, 5180+10, 40, 6, 23, | |
180 | NL80211_RRF_PASSIVE_SCAN), | |
181 | /* IEEE 802.11a, channel 40 */ | |
182 | REG_RULE(5200-10, 5200+10, 40, 6, 23, | |
183 | NL80211_RRF_PASSIVE_SCAN), | |
184 | /* IEEE 802.11a, channel 44 */ | |
185 | REG_RULE(5220-10, 5220+10, 40, 6, 23, | |
186 | NL80211_RRF_PASSIVE_SCAN), | |
187 | /* IEEE 802.11a, channels 48..64 */ | |
188 | REG_RULE(5240-10, 5320+10, 40, 6, 20, | |
189 | NL80211_RRF_NO_IBSS | | |
190 | NL80211_RRF_DFS), | |
191 | /* IEEE 802.11a, channels 100..140 */ | |
192 | REG_RULE(5500-10, 5700+10, 40, 6, 30, | |
193 | NL80211_RRF_NO_IBSS | | |
194 | NL80211_RRF_DFS), | |
195 | } | |
196 | }; | |
197 | ||
198 | static const struct ieee80211_regdomain *static_regdom(char *alpha2) | |
199 | { | |
200 | if (alpha2[0] == 'U' && alpha2[1] == 'S') | |
201 | return &us_regdom; | |
202 | if (alpha2[0] == 'J' && alpha2[1] == 'P') | |
203 | return &jp_regdom; | |
204 | if (alpha2[0] == 'E' && alpha2[1] == 'U') | |
205 | return &eu_regdom; | |
206 | /* Default, as per the old rules */ | |
207 | return &us_regdom; | |
208 | } | |
209 | ||
a3d2eaf0 | 210 | static bool is_old_static_regdom(const struct ieee80211_regdomain *rd) |
734366de JB |
211 | { |
212 | if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom) | |
213 | return true; | |
214 | return false; | |
215 | } | |
942b25cf JB |
216 | #else |
217 | static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd) | |
734366de | 218 | { |
942b25cf | 219 | return false; |
734366de | 220 | } |
942b25cf JB |
221 | #endif |
222 | ||
734366de JB |
223 | static void reset_regdomains(void) |
224 | { | |
942b25cf JB |
225 | /* avoid freeing static information or freeing something twice */ |
226 | if (cfg80211_regdomain == cfg80211_world_regdom) | |
227 | cfg80211_regdomain = NULL; | |
228 | if (cfg80211_world_regdom == &world_regdom) | |
229 | cfg80211_world_regdom = NULL; | |
230 | if (cfg80211_regdomain == &world_regdom) | |
231 | cfg80211_regdomain = NULL; | |
232 | if (is_old_static_regdom(cfg80211_regdomain)) | |
233 | cfg80211_regdomain = NULL; | |
234 | ||
235 | kfree(cfg80211_regdomain); | |
236 | kfree(cfg80211_world_regdom); | |
734366de | 237 | |
a3d2eaf0 | 238 | cfg80211_world_regdom = &world_regdom; |
734366de JB |
239 | cfg80211_regdomain = NULL; |
240 | } | |
241 | ||
fb1fc7ad LR |
242 | /* |
243 | * Dynamic world regulatory domain requested by the wireless | |
244 | * core upon initialization | |
245 | */ | |
a3d2eaf0 | 246 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 247 | { |
f6037d09 | 248 | BUG_ON(!last_request); |
734366de JB |
249 | |
250 | reset_regdomains(); | |
251 | ||
252 | cfg80211_world_regdom = rd; | |
253 | cfg80211_regdomain = rd; | |
254 | } | |
734366de | 255 | |
a3d2eaf0 | 256 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
257 | { |
258 | if (!alpha2) | |
259 | return false; | |
260 | if (alpha2[0] == '0' && alpha2[1] == '0') | |
261 | return true; | |
262 | return false; | |
263 | } | |
8318d78a | 264 | |
a3d2eaf0 | 265 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
266 | { |
267 | if (!alpha2) | |
268 | return false; | |
269 | if (alpha2[0] != 0 && alpha2[1] != 0) | |
270 | return true; | |
271 | return false; | |
272 | } | |
8318d78a | 273 | |
b2e1b302 LR |
274 | static bool is_alpha_upper(char letter) |
275 | { | |
276 | /* ASCII A - Z */ | |
277 | if (letter >= 65 && letter <= 90) | |
278 | return true; | |
279 | return false; | |
280 | } | |
8318d78a | 281 | |
a3d2eaf0 | 282 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
283 | { |
284 | if (!alpha2) | |
285 | return false; | |
fb1fc7ad LR |
286 | /* |
287 | * Special case where regulatory domain was built by driver | |
288 | * but a specific alpha2 cannot be determined | |
289 | */ | |
b2e1b302 LR |
290 | if (alpha2[0] == '9' && alpha2[1] == '9') |
291 | return true; | |
292 | return false; | |
293 | } | |
8318d78a | 294 | |
3f2355cb LR |
295 | static bool is_intersected_alpha2(const char *alpha2) |
296 | { | |
297 | if (!alpha2) | |
298 | return false; | |
fb1fc7ad LR |
299 | /* |
300 | * Special case where regulatory domain is the | |
3f2355cb | 301 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
302 | * structures |
303 | */ | |
3f2355cb LR |
304 | if (alpha2[0] == '9' && alpha2[1] == '8') |
305 | return true; | |
306 | return false; | |
307 | } | |
308 | ||
a3d2eaf0 | 309 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
310 | { |
311 | if (!alpha2) | |
312 | return false; | |
313 | if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) | |
314 | return true; | |
315 | return false; | |
316 | } | |
8318d78a | 317 | |
a3d2eaf0 | 318 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
319 | { |
320 | if (!alpha2_x || !alpha2_y) | |
321 | return false; | |
322 | if (alpha2_x[0] == alpha2_y[0] && | |
323 | alpha2_x[1] == alpha2_y[1]) | |
324 | return true; | |
325 | return false; | |
326 | } | |
327 | ||
69b1572b | 328 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 329 | { |
761cf7ec LR |
330 | assert_cfg80211_lock(); |
331 | ||
b2e1b302 LR |
332 | if (!cfg80211_regdomain) |
333 | return true; | |
334 | if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) | |
335 | return false; | |
336 | return true; | |
337 | } | |
338 | ||
3f2355cb LR |
339 | /** |
340 | * country_ie_integrity_changes - tells us if the country IE has changed | |
341 | * @checksum: checksum of country IE of fields we are interested in | |
342 | * | |
343 | * If the country IE has not changed you can ignore it safely. This is | |
344 | * useful to determine if two devices are seeing two different country IEs | |
345 | * even on the same alpha2. Note that this will return false if no IE has | |
346 | * been set on the wireless core yet. | |
347 | */ | |
348 | static bool country_ie_integrity_changes(u32 checksum) | |
349 | { | |
350 | /* If no IE has been set then the checksum doesn't change */ | |
351 | if (unlikely(!last_request->country_ie_checksum)) | |
352 | return false; | |
353 | if (unlikely(last_request->country_ie_checksum != checksum)) | |
354 | return true; | |
355 | return false; | |
356 | } | |
357 | ||
fb1fc7ad LR |
358 | /* |
359 | * This lets us keep regulatory code which is updated on a regulatory | |
360 | * basis in userspace. | |
361 | */ | |
b2e1b302 LR |
362 | static int call_crda(const char *alpha2) |
363 | { | |
364 | char country_env[9 + 2] = "COUNTRY="; | |
365 | char *envp[] = { | |
366 | country_env, | |
367 | NULL | |
368 | }; | |
369 | ||
370 | if (!is_world_regdom((char *) alpha2)) | |
371 | printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", | |
372 | alpha2[0], alpha2[1]); | |
373 | else | |
b2e1b302 LR |
374 | printk(KERN_INFO "cfg80211: Calling CRDA to update world " |
375 | "regulatory domain\n"); | |
b2e1b302 LR |
376 | |
377 | country_env[8] = alpha2[0]; | |
378 | country_env[9] = alpha2[1]; | |
379 | ||
380 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); | |
381 | } | |
382 | ||
b2e1b302 | 383 | /* Used by nl80211 before kmalloc'ing our regulatory domain */ |
a3d2eaf0 | 384 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 385 | { |
f6037d09 JB |
386 | if (!last_request) |
387 | return false; | |
388 | ||
389 | return alpha2_equal(last_request->alpha2, alpha2); | |
b2e1b302 | 390 | } |
8318d78a | 391 | |
b2e1b302 | 392 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 393 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 394 | { |
a3d2eaf0 | 395 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
396 | u32 freq_diff; |
397 | ||
91e99004 | 398 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
399 | return false; |
400 | ||
401 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
402 | return false; | |
403 | ||
404 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
405 | ||
bd05f28e RK |
406 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
407 | freq_range->max_bandwidth_khz > freq_diff) | |
b2e1b302 LR |
408 | return false; |
409 | ||
410 | return true; | |
411 | } | |
412 | ||
a3d2eaf0 | 413 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 414 | { |
a3d2eaf0 | 415 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 416 | unsigned int i; |
8318d78a | 417 | |
b2e1b302 LR |
418 | if (!rd->n_reg_rules) |
419 | return false; | |
8318d78a | 420 | |
88dc1c3f LR |
421 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
422 | return false; | |
423 | ||
b2e1b302 LR |
424 | for (i = 0; i < rd->n_reg_rules; i++) { |
425 | reg_rule = &rd->reg_rules[i]; | |
426 | if (!is_valid_reg_rule(reg_rule)) | |
427 | return false; | |
428 | } | |
429 | ||
430 | return true; | |
8318d78a JB |
431 | } |
432 | ||
b2e1b302 LR |
433 | /* Returns value in KHz */ |
434 | static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range, | |
435 | u32 freq) | |
436 | { | |
437 | unsigned int i; | |
438 | for (i = 0; i < ARRAY_SIZE(supported_bandwidths); i++) { | |
439 | u32 start_freq_khz = freq - supported_bandwidths[i]/2; | |
440 | u32 end_freq_khz = freq + supported_bandwidths[i]/2; | |
441 | if (start_freq_khz >= freq_range->start_freq_khz && | |
442 | end_freq_khz <= freq_range->end_freq_khz) | |
443 | return supported_bandwidths[i]; | |
444 | } | |
445 | return 0; | |
446 | } | |
8318d78a | 447 | |
0c7dc45d LR |
448 | /** |
449 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
450 | * @freq_range: frequency rule we want to query | |
451 | * @freq_khz: frequency we are inquiring about | |
452 | * | |
453 | * This lets us know if a specific frequency rule is or is not relevant to | |
454 | * a specific frequency's band. Bands are device specific and artificial | |
455 | * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is | |
456 | * safe for now to assume that a frequency rule should not be part of a | |
457 | * frequency's band if the start freq or end freq are off by more than 2 GHz. | |
458 | * This resolution can be lowered and should be considered as we add | |
459 | * regulatory rule support for other "bands". | |
460 | **/ | |
461 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
462 | u32 freq_khz) | |
463 | { | |
464 | #define ONE_GHZ_IN_KHZ 1000000 | |
465 | if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) | |
466 | return true; | |
467 | if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) | |
468 | return true; | |
469 | return false; | |
470 | #undef ONE_GHZ_IN_KHZ | |
471 | } | |
472 | ||
fb1fc7ad LR |
473 | /* |
474 | * Converts a country IE to a regulatory domain. A regulatory domain | |
3f2355cb LR |
475 | * structure has a lot of information which the IE doesn't yet have, |
476 | * so for the other values we use upper max values as we will intersect | |
fb1fc7ad LR |
477 | * with our userspace regulatory agent to get lower bounds. |
478 | */ | |
3f2355cb LR |
479 | static struct ieee80211_regdomain *country_ie_2_rd( |
480 | u8 *country_ie, | |
481 | u8 country_ie_len, | |
482 | u32 *checksum) | |
483 | { | |
484 | struct ieee80211_regdomain *rd = NULL; | |
485 | unsigned int i = 0; | |
486 | char alpha2[2]; | |
487 | u32 flags = 0; | |
488 | u32 num_rules = 0, size_of_regd = 0; | |
489 | u8 *triplets_start = NULL; | |
490 | u8 len_at_triplet = 0; | |
491 | /* the last channel we have registered in a subband (triplet) */ | |
492 | int last_sub_max_channel = 0; | |
493 | ||
494 | *checksum = 0xDEADBEEF; | |
495 | ||
496 | /* Country IE requirements */ | |
497 | BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || | |
498 | country_ie_len & 0x01); | |
499 | ||
500 | alpha2[0] = country_ie[0]; | |
501 | alpha2[1] = country_ie[1]; | |
502 | ||
503 | /* | |
504 | * Third octet can be: | |
505 | * 'I' - Indoor | |
506 | * 'O' - Outdoor | |
507 | * | |
508 | * anything else we assume is no restrictions | |
509 | */ | |
510 | if (country_ie[2] == 'I') | |
511 | flags = NL80211_RRF_NO_OUTDOOR; | |
512 | else if (country_ie[2] == 'O') | |
513 | flags = NL80211_RRF_NO_INDOOR; | |
514 | ||
515 | country_ie += 3; | |
516 | country_ie_len -= 3; | |
517 | ||
518 | triplets_start = country_ie; | |
519 | len_at_triplet = country_ie_len; | |
520 | ||
521 | *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); | |
522 | ||
fb1fc7ad LR |
523 | /* |
524 | * We need to build a reg rule for each triplet, but first we must | |
3f2355cb | 525 | * calculate the number of reg rules we will need. We will need one |
fb1fc7ad LR |
526 | * for each channel subband |
527 | */ | |
3f2355cb | 528 | while (country_ie_len >= 3) { |
615aab4b | 529 | int end_channel = 0; |
3f2355cb LR |
530 | struct ieee80211_country_ie_triplet *triplet = |
531 | (struct ieee80211_country_ie_triplet *) country_ie; | |
532 | int cur_sub_max_channel = 0, cur_channel = 0; | |
533 | ||
534 | if (triplet->ext.reg_extension_id >= | |
535 | IEEE80211_COUNTRY_EXTENSION_ID) { | |
536 | country_ie += 3; | |
537 | country_ie_len -= 3; | |
538 | continue; | |
539 | } | |
540 | ||
615aab4b LR |
541 | /* 2 GHz */ |
542 | if (triplet->chans.first_channel <= 14) | |
543 | end_channel = triplet->chans.first_channel + | |
544 | triplet->chans.num_channels; | |
545 | else | |
546 | /* | |
547 | * 5 GHz -- For example in country IEs if the first | |
548 | * channel given is 36 and the number of channels is 4 | |
549 | * then the individual channel numbers defined for the | |
550 | * 5 GHz PHY by these parameters are: 36, 40, 44, and 48 | |
551 | * and not 36, 37, 38, 39. | |
552 | * | |
553 | * See: http://tinyurl.com/11d-clarification | |
554 | */ | |
555 | end_channel = triplet->chans.first_channel + | |
556 | (4 * (triplet->chans.num_channels - 1)); | |
557 | ||
3f2355cb | 558 | cur_channel = triplet->chans.first_channel; |
615aab4b | 559 | cur_sub_max_channel = end_channel; |
3f2355cb LR |
560 | |
561 | /* Basic sanity check */ | |
562 | if (cur_sub_max_channel < cur_channel) | |
563 | return NULL; | |
564 | ||
fb1fc7ad LR |
565 | /* |
566 | * Do not allow overlapping channels. Also channels | |
3f2355cb | 567 | * passed in each subband must be monotonically |
fb1fc7ad LR |
568 | * increasing |
569 | */ | |
3f2355cb LR |
570 | if (last_sub_max_channel) { |
571 | if (cur_channel <= last_sub_max_channel) | |
572 | return NULL; | |
573 | if (cur_sub_max_channel <= last_sub_max_channel) | |
574 | return NULL; | |
575 | } | |
576 | ||
fb1fc7ad LR |
577 | /* |
578 | * When dot11RegulatoryClassesRequired is supported | |
3f2355cb LR |
579 | * we can throw ext triplets as part of this soup, |
580 | * for now we don't care when those change as we | |
fb1fc7ad LR |
581 | * don't support them |
582 | */ | |
3f2355cb LR |
583 | *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | |
584 | ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | | |
585 | ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); | |
586 | ||
587 | last_sub_max_channel = cur_sub_max_channel; | |
588 | ||
589 | country_ie += 3; | |
590 | country_ie_len -= 3; | |
591 | num_rules++; | |
592 | ||
fb1fc7ad LR |
593 | /* |
594 | * Note: this is not a IEEE requirement but | |
595 | * simply a memory requirement | |
596 | */ | |
3f2355cb LR |
597 | if (num_rules > NL80211_MAX_SUPP_REG_RULES) |
598 | return NULL; | |
599 | } | |
600 | ||
601 | country_ie = triplets_start; | |
602 | country_ie_len = len_at_triplet; | |
603 | ||
604 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
605 | (num_rules * sizeof(struct ieee80211_reg_rule)); | |
606 | ||
607 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
608 | if (!rd) | |
609 | return NULL; | |
610 | ||
611 | rd->n_reg_rules = num_rules; | |
612 | rd->alpha2[0] = alpha2[0]; | |
613 | rd->alpha2[1] = alpha2[1]; | |
614 | ||
615 | /* This time around we fill in the rd */ | |
616 | while (country_ie_len >= 3) { | |
02e68a3d | 617 | int end_channel = 0; |
3f2355cb LR |
618 | struct ieee80211_country_ie_triplet *triplet = |
619 | (struct ieee80211_country_ie_triplet *) country_ie; | |
620 | struct ieee80211_reg_rule *reg_rule = NULL; | |
621 | struct ieee80211_freq_range *freq_range = NULL; | |
622 | struct ieee80211_power_rule *power_rule = NULL; | |
623 | ||
fb1fc7ad LR |
624 | /* |
625 | * Must parse if dot11RegulatoryClassesRequired is true, | |
626 | * we don't support this yet | |
627 | */ | |
3f2355cb LR |
628 | if (triplet->ext.reg_extension_id >= |
629 | IEEE80211_COUNTRY_EXTENSION_ID) { | |
630 | country_ie += 3; | |
631 | country_ie_len -= 3; | |
632 | continue; | |
633 | } | |
634 | ||
635 | reg_rule = &rd->reg_rules[i]; | |
636 | freq_range = ®_rule->freq_range; | |
637 | power_rule = ®_rule->power_rule; | |
638 | ||
639 | reg_rule->flags = flags; | |
640 | ||
02e68a3d LR |
641 | /* 2 GHz */ |
642 | if (triplet->chans.first_channel <= 14) | |
643 | end_channel = triplet->chans.first_channel + | |
644 | triplet->chans.num_channels; | |
645 | else | |
02e68a3d LR |
646 | end_channel = triplet->chans.first_channel + |
647 | (4 * (triplet->chans.num_channels - 1)); | |
648 | ||
fb1fc7ad LR |
649 | /* |
650 | * The +10 is since the regulatory domain expects | |
3f2355cb LR |
651 | * the actual band edge, not the center of freq for |
652 | * its start and end freqs, assuming 20 MHz bandwidth on | |
fb1fc7ad LR |
653 | * the channels passed |
654 | */ | |
3f2355cb LR |
655 | freq_range->start_freq_khz = |
656 | MHZ_TO_KHZ(ieee80211_channel_to_frequency( | |
657 | triplet->chans.first_channel) - 10); | |
658 | freq_range->end_freq_khz = | |
659 | MHZ_TO_KHZ(ieee80211_channel_to_frequency( | |
02e68a3d | 660 | end_channel) + 10); |
3f2355cb | 661 | |
fb1fc7ad LR |
662 | /* |
663 | * These are large arbitrary values we use to intersect later. | |
664 | * Increment this if we ever support >= 40 MHz channels | |
665 | * in IEEE 802.11 | |
666 | */ | |
3f2355cb LR |
667 | freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); |
668 | power_rule->max_antenna_gain = DBI_TO_MBI(100); | |
669 | power_rule->max_eirp = DBM_TO_MBM(100); | |
670 | ||
671 | country_ie += 3; | |
672 | country_ie_len -= 3; | |
673 | i++; | |
674 | ||
675 | BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); | |
676 | } | |
677 | ||
678 | return rd; | |
679 | } | |
680 | ||
681 | ||
fb1fc7ad LR |
682 | /* |
683 | * Helper for regdom_intersect(), this does the real | |
684 | * mathematical intersection fun | |
685 | */ | |
9c96477d LR |
686 | static int reg_rules_intersect( |
687 | const struct ieee80211_reg_rule *rule1, | |
688 | const struct ieee80211_reg_rule *rule2, | |
689 | struct ieee80211_reg_rule *intersected_rule) | |
690 | { | |
691 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
692 | struct ieee80211_freq_range *freq_range; | |
693 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
694 | struct ieee80211_power_rule *power_rule; | |
695 | u32 freq_diff; | |
696 | ||
697 | freq_range1 = &rule1->freq_range; | |
698 | freq_range2 = &rule2->freq_range; | |
699 | freq_range = &intersected_rule->freq_range; | |
700 | ||
701 | power_rule1 = &rule1->power_rule; | |
702 | power_rule2 = &rule2->power_rule; | |
703 | power_rule = &intersected_rule->power_rule; | |
704 | ||
705 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
706 | freq_range2->start_freq_khz); | |
707 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, | |
708 | freq_range2->end_freq_khz); | |
709 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, | |
710 | freq_range2->max_bandwidth_khz); | |
711 | ||
712 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
713 | if (freq_range->max_bandwidth_khz > freq_diff) | |
714 | freq_range->max_bandwidth_khz = freq_diff; | |
715 | ||
716 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
717 | power_rule2->max_eirp); | |
718 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
719 | power_rule2->max_antenna_gain); | |
720 | ||
721 | intersected_rule->flags = (rule1->flags | rule2->flags); | |
722 | ||
723 | if (!is_valid_reg_rule(intersected_rule)) | |
724 | return -EINVAL; | |
725 | ||
726 | return 0; | |
727 | } | |
728 | ||
729 | /** | |
730 | * regdom_intersect - do the intersection between two regulatory domains | |
731 | * @rd1: first regulatory domain | |
732 | * @rd2: second regulatory domain | |
733 | * | |
734 | * Use this function to get the intersection between two regulatory domains. | |
735 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
736 | * as no one single alpha2 can represent this regulatory domain. | |
737 | * | |
738 | * Returns a pointer to the regulatory domain structure which will hold the | |
739 | * resulting intersection of rules between rd1 and rd2. We will | |
740 | * kzalloc() this structure for you. | |
741 | */ | |
742 | static struct ieee80211_regdomain *regdom_intersect( | |
743 | const struct ieee80211_regdomain *rd1, | |
744 | const struct ieee80211_regdomain *rd2) | |
745 | { | |
746 | int r, size_of_regd; | |
747 | unsigned int x, y; | |
748 | unsigned int num_rules = 0, rule_idx = 0; | |
749 | const struct ieee80211_reg_rule *rule1, *rule2; | |
750 | struct ieee80211_reg_rule *intersected_rule; | |
751 | struct ieee80211_regdomain *rd; | |
752 | /* This is just a dummy holder to help us count */ | |
753 | struct ieee80211_reg_rule irule; | |
754 | ||
755 | /* Uses the stack temporarily for counter arithmetic */ | |
756 | intersected_rule = &irule; | |
757 | ||
758 | memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); | |
759 | ||
760 | if (!rd1 || !rd2) | |
761 | return NULL; | |
762 | ||
fb1fc7ad LR |
763 | /* |
764 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
765 | * build them. This is to so we can malloc() and free() a |
766 | * regdomain once. The reason we use reg_rules_intersect() here | |
767 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
768 | * All rules that do check out OK are valid. |
769 | */ | |
9c96477d LR |
770 | |
771 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
772 | rule1 = &rd1->reg_rules[x]; | |
773 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
774 | rule2 = &rd2->reg_rules[y]; | |
775 | if (!reg_rules_intersect(rule1, rule2, | |
776 | intersected_rule)) | |
777 | num_rules++; | |
778 | memset(intersected_rule, 0, | |
779 | sizeof(struct ieee80211_reg_rule)); | |
780 | } | |
781 | } | |
782 | ||
783 | if (!num_rules) | |
784 | return NULL; | |
785 | ||
786 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
787 | ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); | |
788 | ||
789 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
790 | if (!rd) | |
791 | return NULL; | |
792 | ||
793 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
794 | rule1 = &rd1->reg_rules[x]; | |
795 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
796 | rule2 = &rd2->reg_rules[y]; | |
fb1fc7ad LR |
797 | /* |
798 | * This time around instead of using the stack lets | |
9c96477d | 799 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
800 | * a memcpy() |
801 | */ | |
9c96477d LR |
802 | intersected_rule = &rd->reg_rules[rule_idx]; |
803 | r = reg_rules_intersect(rule1, rule2, | |
804 | intersected_rule); | |
fb1fc7ad LR |
805 | /* |
806 | * No need to memset here the intersected rule here as | |
807 | * we're not using the stack anymore | |
808 | */ | |
9c96477d LR |
809 | if (r) |
810 | continue; | |
811 | rule_idx++; | |
812 | } | |
813 | } | |
814 | ||
815 | if (rule_idx != num_rules) { | |
816 | kfree(rd); | |
817 | return NULL; | |
818 | } | |
819 | ||
820 | rd->n_reg_rules = num_rules; | |
821 | rd->alpha2[0] = '9'; | |
822 | rd->alpha2[1] = '8'; | |
823 | ||
824 | return rd; | |
825 | } | |
826 | ||
fb1fc7ad LR |
827 | /* |
828 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
829 | * want to just have the channel structure use these | |
830 | */ | |
b2e1b302 LR |
831 | static u32 map_regdom_flags(u32 rd_flags) |
832 | { | |
833 | u32 channel_flags = 0; | |
834 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) | |
835 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; | |
836 | if (rd_flags & NL80211_RRF_NO_IBSS) | |
837 | channel_flags |= IEEE80211_CHAN_NO_IBSS; | |
838 | if (rd_flags & NL80211_RRF_DFS) | |
839 | channel_flags |= IEEE80211_CHAN_RADAR; | |
840 | return channel_flags; | |
841 | } | |
842 | ||
1fa25e41 LR |
843 | static int freq_reg_info_regd(struct wiphy *wiphy, |
844 | u32 center_freq, | |
845 | u32 *bandwidth, | |
846 | const struct ieee80211_reg_rule **reg_rule, | |
847 | const struct ieee80211_regdomain *custom_regd) | |
8318d78a JB |
848 | { |
849 | int i; | |
0c7dc45d | 850 | bool band_rule_found = false; |
3e0c3ff3 | 851 | const struct ieee80211_regdomain *regd; |
b2e1b302 | 852 | u32 max_bandwidth = 0; |
8318d78a | 853 | |
1fa25e41 | 854 | regd = custom_regd ? custom_regd : cfg80211_regdomain; |
3e0c3ff3 | 855 | |
fb1fc7ad LR |
856 | /* |
857 | * Follow the driver's regulatory domain, if present, unless a country | |
858 | * IE has been processed or a user wants to help complaince further | |
859 | */ | |
3e0c3ff3 | 860 | if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE && |
24ed1da1 | 861 | last_request->initiator != REGDOM_SET_BY_USER && |
3e0c3ff3 LR |
862 | wiphy->regd) |
863 | regd = wiphy->regd; | |
864 | ||
865 | if (!regd) | |
b2e1b302 LR |
866 | return -EINVAL; |
867 | ||
3e0c3ff3 | 868 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
869 | const struct ieee80211_reg_rule *rr; |
870 | const struct ieee80211_freq_range *fr = NULL; | |
871 | const struct ieee80211_power_rule *pr = NULL; | |
872 | ||
3e0c3ff3 | 873 | rr = ®d->reg_rules[i]; |
b2e1b302 LR |
874 | fr = &rr->freq_range; |
875 | pr = &rr->power_rule; | |
0c7dc45d | 876 | |
fb1fc7ad LR |
877 | /* |
878 | * We only need to know if one frequency rule was | |
0c7dc45d | 879 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
880 | * not overwrite it once found |
881 | */ | |
0c7dc45d LR |
882 | if (!band_rule_found) |
883 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
884 | ||
b2e1b302 | 885 | max_bandwidth = freq_max_bandwidth(fr, center_freq); |
0c7dc45d | 886 | |
b2e1b302 LR |
887 | if (max_bandwidth && *bandwidth <= max_bandwidth) { |
888 | *reg_rule = rr; | |
889 | *bandwidth = max_bandwidth; | |
8318d78a JB |
890 | break; |
891 | } | |
892 | } | |
893 | ||
0c7dc45d LR |
894 | if (!band_rule_found) |
895 | return -ERANGE; | |
896 | ||
b2e1b302 LR |
897 | return !max_bandwidth; |
898 | } | |
34f57347 | 899 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 900 | |
34f57347 | 901 | int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth, |
1fa25e41 LR |
902 | const struct ieee80211_reg_rule **reg_rule) |
903 | { | |
904 | return freq_reg_info_regd(wiphy, center_freq, | |
905 | bandwidth, reg_rule, NULL); | |
906 | } | |
b2e1b302 | 907 | |
a92a3ce7 LR |
908 | static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, |
909 | unsigned int chan_idx) | |
b2e1b302 LR |
910 | { |
911 | int r; | |
a92a3ce7 | 912 | u32 flags; |
b2e1b302 LR |
913 | u32 max_bandwidth = 0; |
914 | const struct ieee80211_reg_rule *reg_rule = NULL; | |
915 | const struct ieee80211_power_rule *power_rule = NULL; | |
a92a3ce7 LR |
916 | struct ieee80211_supported_band *sband; |
917 | struct ieee80211_channel *chan; | |
fe33eb39 | 918 | struct wiphy *request_wiphy = NULL; |
a92a3ce7 | 919 | |
761cf7ec LR |
920 | assert_cfg80211_lock(); |
921 | ||
806a9e39 LR |
922 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
923 | ||
a92a3ce7 LR |
924 | sband = wiphy->bands[band]; |
925 | BUG_ON(chan_idx >= sband->n_channels); | |
926 | chan = &sband->channels[chan_idx]; | |
927 | ||
928 | flags = chan->orig_flags; | |
b2e1b302 | 929 | |
3e0c3ff3 | 930 | r = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq), |
b2e1b302 LR |
931 | &max_bandwidth, ®_rule); |
932 | ||
933 | if (r) { | |
fb1fc7ad LR |
934 | /* |
935 | * This means no regulatory rule was found in the country IE | |
0c7dc45d LR |
936 | * with a frequency range on the center_freq's band, since |
937 | * IEEE-802.11 allows for a country IE to have a subset of the | |
938 | * regulatory information provided in a country we ignore | |
939 | * disabling the channel unless at least one reg rule was | |
940 | * found on the center_freq's band. For details see this | |
941 | * clarification: | |
942 | * | |
943 | * http://tinyurl.com/11d-clarification | |
944 | */ | |
945 | if (r == -ERANGE && | |
946 | last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { | |
947 | #ifdef CONFIG_CFG80211_REG_DEBUG | |
948 | printk(KERN_DEBUG "cfg80211: Leaving channel %d MHz " | |
949 | "intact on %s - no rule found in band on " | |
950 | "Country IE\n", | |
951 | chan->center_freq, wiphy_name(wiphy)); | |
952 | #endif | |
953 | } else { | |
fb1fc7ad LR |
954 | /* |
955 | * In this case we know the country IE has at least one reg rule | |
956 | * for the band so we respect its band definitions | |
957 | */ | |
0c7dc45d LR |
958 | #ifdef CONFIG_CFG80211_REG_DEBUG |
959 | if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) | |
960 | printk(KERN_DEBUG "cfg80211: Disabling " | |
961 | "channel %d MHz on %s due to " | |
962 | "Country IE\n", | |
963 | chan->center_freq, wiphy_name(wiphy)); | |
964 | #endif | |
965 | flags |= IEEE80211_CHAN_DISABLED; | |
966 | chan->flags = flags; | |
967 | } | |
8318d78a JB |
968 | return; |
969 | } | |
970 | ||
b2e1b302 LR |
971 | power_rule = ®_rule->power_rule; |
972 | ||
f976376d | 973 | if (last_request->initiator == REGDOM_SET_BY_DRIVER && |
806a9e39 LR |
974 | request_wiphy && request_wiphy == wiphy && |
975 | request_wiphy->strict_regulatory) { | |
fb1fc7ad LR |
976 | /* |
977 | * This gaurantees the driver's requested regulatory domain | |
f976376d | 978 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
979 | * settings |
980 | */ | |
f976376d LR |
981 | chan->flags = chan->orig_flags = |
982 | map_regdom_flags(reg_rule->flags); | |
983 | chan->max_antenna_gain = chan->orig_mag = | |
984 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
985 | chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); | |
986 | chan->max_power = chan->orig_mpwr = | |
987 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
988 | return; | |
989 | } | |
990 | ||
b2e1b302 | 991 | chan->flags = flags | map_regdom_flags(reg_rule->flags); |
8318d78a | 992 | chan->max_antenna_gain = min(chan->orig_mag, |
b2e1b302 LR |
993 | (int) MBI_TO_DBI(power_rule->max_antenna_gain)); |
994 | chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); | |
253898c4 | 995 | if (chan->orig_mpwr) |
b2e1b302 LR |
996 | chan->max_power = min(chan->orig_mpwr, |
997 | (int) MBM_TO_DBM(power_rule->max_eirp)); | |
253898c4 | 998 | else |
b2e1b302 | 999 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
8318d78a JB |
1000 | } |
1001 | ||
a92a3ce7 | 1002 | static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) |
8318d78a | 1003 | { |
a92a3ce7 LR |
1004 | unsigned int i; |
1005 | struct ieee80211_supported_band *sband; | |
1006 | ||
1007 | BUG_ON(!wiphy->bands[band]); | |
1008 | sband = wiphy->bands[band]; | |
8318d78a JB |
1009 | |
1010 | for (i = 0; i < sband->n_channels; i++) | |
a92a3ce7 | 1011 | handle_channel(wiphy, band, i); |
8318d78a JB |
1012 | } |
1013 | ||
14b9815a LR |
1014 | static bool ignore_reg_update(struct wiphy *wiphy, enum reg_set_by setby) |
1015 | { | |
1016 | if (!last_request) | |
1017 | return true; | |
1018 | if (setby == REGDOM_SET_BY_CORE && | |
2a44f911 | 1019 | wiphy->custom_regulatory) |
14b9815a | 1020 | return true; |
fb1fc7ad LR |
1021 | /* |
1022 | * wiphy->regd will be set once the device has its own | |
1023 | * desired regulatory domain set | |
1024 | */ | |
f976376d LR |
1025 | if (wiphy->strict_regulatory && !wiphy->regd && |
1026 | !is_world_regdom(last_request->alpha2)) | |
14b9815a LR |
1027 | return true; |
1028 | return false; | |
1029 | } | |
1030 | ||
b2e1b302 | 1031 | static void update_all_wiphy_regulatory(enum reg_set_by setby) |
8318d78a | 1032 | { |
b2e1b302 | 1033 | struct cfg80211_registered_device *drv; |
8318d78a | 1034 | |
b2e1b302 | 1035 | list_for_each_entry(drv, &cfg80211_drv_list, list) |
d46e5b1d | 1036 | wiphy_update_regulatory(&drv->wiphy, setby); |
b2e1b302 LR |
1037 | } |
1038 | ||
e38f8a7a LR |
1039 | static void handle_reg_beacon(struct wiphy *wiphy, |
1040 | unsigned int chan_idx, | |
1041 | struct reg_beacon *reg_beacon) | |
1042 | { | |
1043 | #ifdef CONFIG_CFG80211_REG_DEBUG | |
1044 | #define REG_DEBUG_BEACON_FLAG(desc) \ | |
1045 | printk(KERN_DEBUG "cfg80211: Enabling " desc " on " \ | |
1046 | "frequency: %d MHz (Ch %d) on %s\n", \ | |
1047 | reg_beacon->chan.center_freq, \ | |
1048 | ieee80211_frequency_to_channel(reg_beacon->chan.center_freq), \ | |
1049 | wiphy_name(wiphy)); | |
1050 | #else | |
1051 | #define REG_DEBUG_BEACON_FLAG(desc) do {} while (0) | |
1052 | #endif | |
1053 | struct ieee80211_supported_band *sband; | |
1054 | struct ieee80211_channel *chan; | |
1055 | ||
1056 | assert_cfg80211_lock(); | |
1057 | ||
1058 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1059 | chan = &sband->channels[chan_idx]; | |
1060 | ||
1061 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1062 | return; | |
1063 | ||
1064 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { | |
1065 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; | |
1066 | REG_DEBUG_BEACON_FLAG("active scanning"); | |
1067 | } | |
1068 | ||
1069 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { | |
1070 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; | |
1071 | REG_DEBUG_BEACON_FLAG("beaconing"); | |
1072 | } | |
1073 | ||
1074 | chan->beacon_found = true; | |
1075 | #undef REG_DEBUG_BEACON_FLAG | |
1076 | } | |
1077 | ||
1078 | /* | |
1079 | * Called when a scan on a wiphy finds a beacon on | |
1080 | * new channel | |
1081 | */ | |
1082 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1083 | struct reg_beacon *reg_beacon) | |
1084 | { | |
1085 | unsigned int i; | |
1086 | struct ieee80211_supported_band *sband; | |
1087 | ||
1088 | assert_cfg80211_lock(); | |
1089 | ||
1090 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1091 | return; | |
1092 | ||
1093 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1094 | ||
1095 | for (i = 0; i < sband->n_channels; i++) | |
1096 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1097 | } | |
1098 | ||
1099 | /* | |
1100 | * Called upon reg changes or a new wiphy is added | |
1101 | */ | |
1102 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1103 | { | |
1104 | unsigned int i; | |
1105 | struct ieee80211_supported_band *sband; | |
1106 | struct reg_beacon *reg_beacon; | |
1107 | ||
1108 | assert_cfg80211_lock(); | |
1109 | ||
1110 | if (list_empty(®_beacon_list)) | |
1111 | return; | |
1112 | ||
1113 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { | |
1114 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1115 | continue; | |
1116 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1117 | for (i = 0; i < sband->n_channels; i++) | |
1118 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | static bool reg_is_world_roaming(struct wiphy *wiphy) | |
1123 | { | |
1124 | if (is_world_regdom(cfg80211_regdomain->alpha2) || | |
1125 | (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) | |
1126 | return true; | |
1127 | if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE && | |
1128 | wiphy->custom_regulatory) | |
1129 | return true; | |
1130 | return false; | |
1131 | } | |
1132 | ||
1133 | /* Reap the advantages of previously found beacons */ | |
1134 | static void reg_process_beacons(struct wiphy *wiphy) | |
1135 | { | |
1136 | if (!reg_is_world_roaming(wiphy)) | |
1137 | return; | |
1138 | wiphy_update_beacon_reg(wiphy); | |
1139 | } | |
1140 | ||
b2e1b302 LR |
1141 | void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby) |
1142 | { | |
1143 | enum ieee80211_band band; | |
d46e5b1d LR |
1144 | |
1145 | if (ignore_reg_update(wiphy, setby)) | |
e38f8a7a | 1146 | goto out; |
b2e1b302 | 1147 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
8318d78a | 1148 | if (wiphy->bands[band]) |
a92a3ce7 | 1149 | handle_band(wiphy, band); |
b2e1b302 | 1150 | } |
e38f8a7a LR |
1151 | out: |
1152 | reg_process_beacons(wiphy); | |
560e28e1 | 1153 | if (wiphy->reg_notifier) |
716f9392 | 1154 | wiphy->reg_notifier(wiphy, last_request); |
b2e1b302 LR |
1155 | } |
1156 | ||
1fa25e41 LR |
1157 | static void handle_channel_custom(struct wiphy *wiphy, |
1158 | enum ieee80211_band band, | |
1159 | unsigned int chan_idx, | |
1160 | const struct ieee80211_regdomain *regd) | |
1161 | { | |
1162 | int r; | |
1163 | u32 max_bandwidth = 0; | |
1164 | const struct ieee80211_reg_rule *reg_rule = NULL; | |
1165 | const struct ieee80211_power_rule *power_rule = NULL; | |
1166 | struct ieee80211_supported_band *sband; | |
1167 | struct ieee80211_channel *chan; | |
1168 | ||
1169 | sband = wiphy->bands[band]; | |
1170 | BUG_ON(chan_idx >= sband->n_channels); | |
1171 | chan = &sband->channels[chan_idx]; | |
1172 | ||
1173 | r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), | |
1174 | &max_bandwidth, ®_rule, regd); | |
1175 | ||
1176 | if (r) { | |
1177 | chan->flags = IEEE80211_CHAN_DISABLED; | |
1178 | return; | |
1179 | } | |
1180 | ||
1181 | power_rule = ®_rule->power_rule; | |
1182 | ||
1183 | chan->flags |= map_regdom_flags(reg_rule->flags); | |
1184 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
1185 | chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); | |
1186 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); | |
1187 | } | |
1188 | ||
1189 | static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, | |
1190 | const struct ieee80211_regdomain *regd) | |
1191 | { | |
1192 | unsigned int i; | |
1193 | struct ieee80211_supported_band *sband; | |
1194 | ||
1195 | BUG_ON(!wiphy->bands[band]); | |
1196 | sband = wiphy->bands[band]; | |
1197 | ||
1198 | for (i = 0; i < sband->n_channels; i++) | |
1199 | handle_channel_custom(wiphy, band, i, regd); | |
1200 | } | |
1201 | ||
1202 | /* Used by drivers prior to wiphy registration */ | |
1203 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1204 | const struct ieee80211_regdomain *regd) | |
1205 | { | |
1206 | enum ieee80211_band band; | |
1207 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1208 | if (wiphy->bands[band]) | |
1209 | handle_band_custom(wiphy, band, regd); | |
b2e1b302 LR |
1210 | } |
1211 | } | |
1fa25e41 LR |
1212 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1213 | ||
3e0c3ff3 LR |
1214 | static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, |
1215 | const struct ieee80211_regdomain *src_regd) | |
1216 | { | |
1217 | struct ieee80211_regdomain *regd; | |
1218 | int size_of_regd = 0; | |
1219 | unsigned int i; | |
1220 | ||
1221 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
1222 | ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); | |
1223 | ||
1224 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
1225 | if (!regd) | |
1226 | return -ENOMEM; | |
1227 | ||
1228 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
1229 | ||
1230 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
1231 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
1232 | sizeof(struct ieee80211_reg_rule)); | |
1233 | ||
1234 | *dst_regd = regd; | |
1235 | return 0; | |
1236 | } | |
b2e1b302 | 1237 | |
fb1fc7ad LR |
1238 | /* |
1239 | * Return value which can be used by ignore_request() to indicate | |
1240 | * it has been determined we should intersect two regulatory domains | |
1241 | */ | |
9c96477d LR |
1242 | #define REG_INTERSECT 1 |
1243 | ||
84fa4f43 JB |
1244 | /* This has the logic which determines when a new request |
1245 | * should be ignored. */ | |
2f92cd2e LR |
1246 | static int ignore_request(struct wiphy *wiphy, |
1247 | struct regulatory_request *pending_request) | |
84fa4f43 | 1248 | { |
806a9e39 | 1249 | struct wiphy *last_wiphy = NULL; |
761cf7ec LR |
1250 | |
1251 | assert_cfg80211_lock(); | |
1252 | ||
84fa4f43 JB |
1253 | /* All initial requests are respected */ |
1254 | if (!last_request) | |
1255 | return 0; | |
1256 | ||
2f92cd2e | 1257 | switch (pending_request->initiator) { |
84fa4f43 JB |
1258 | case REGDOM_SET_BY_INIT: |
1259 | return -EINVAL; | |
1260 | case REGDOM_SET_BY_CORE: | |
ba25c141 | 1261 | return -EINVAL; |
84fa4f43 | 1262 | case REGDOM_SET_BY_COUNTRY_IE: |
806a9e39 LR |
1263 | |
1264 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
1265 | ||
2f92cd2e | 1266 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 JB |
1267 | return -EINVAL; |
1268 | if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { | |
806a9e39 | 1269 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1270 | /* |
1271 | * Two cards with two APs claiming different | |
1272 | * different Country IE alpha2s. We could | |
1273 | * intersect them, but that seems unlikely | |
1274 | * to be correct. Reject second one for now. | |
1275 | */ | |
2f92cd2e | 1276 | if (regdom_changes(pending_request->alpha2)) |
84fa4f43 JB |
1277 | return -EOPNOTSUPP; |
1278 | return -EALREADY; | |
1279 | } | |
fb1fc7ad LR |
1280 | /* |
1281 | * Two consecutive Country IE hints on the same wiphy. | |
1282 | * This should be picked up early by the driver/stack | |
1283 | */ | |
2f92cd2e | 1284 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
84fa4f43 JB |
1285 | return 0; |
1286 | return -EALREADY; | |
1287 | } | |
3f2355cb | 1288 | return REG_INTERSECT; |
84fa4f43 | 1289 | case REGDOM_SET_BY_DRIVER: |
e74b1e7f LR |
1290 | if (last_request->initiator == REGDOM_SET_BY_CORE) { |
1291 | if (is_old_static_regdom(cfg80211_regdomain)) | |
1292 | return 0; | |
2f92cd2e | 1293 | if (regdom_changes(pending_request->alpha2)) |
e74b1e7f | 1294 | return 0; |
84fa4f43 | 1295 | return -EALREADY; |
e74b1e7f | 1296 | } |
fff32c04 LR |
1297 | |
1298 | /* | |
1299 | * This would happen if you unplug and plug your card | |
1300 | * back in or if you add a new device for which the previously | |
1301 | * loaded card also agrees on the regulatory domain. | |
1302 | */ | |
1303 | if (last_request->initiator == REGDOM_SET_BY_DRIVER && | |
2f92cd2e | 1304 | !regdom_changes(pending_request->alpha2)) |
fff32c04 LR |
1305 | return -EALREADY; |
1306 | ||
3e0c3ff3 | 1307 | return REG_INTERSECT; |
84fa4f43 | 1308 | case REGDOM_SET_BY_USER: |
84fa4f43 | 1309 | if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) |
9c96477d | 1310 | return REG_INTERSECT; |
fb1fc7ad LR |
1311 | /* |
1312 | * If the user knows better the user should set the regdom | |
1313 | * to their country before the IE is picked up | |
1314 | */ | |
3f2355cb LR |
1315 | if (last_request->initiator == REGDOM_SET_BY_USER && |
1316 | last_request->intersect) | |
1317 | return -EOPNOTSUPP; | |
fb1fc7ad LR |
1318 | /* |
1319 | * Process user requests only after previous user/driver/core | |
1320 | * requests have been processed | |
1321 | */ | |
5eebade6 LR |
1322 | if (last_request->initiator == REGDOM_SET_BY_CORE || |
1323 | last_request->initiator == REGDOM_SET_BY_DRIVER || | |
1324 | last_request->initiator == REGDOM_SET_BY_USER) { | |
69b1572b | 1325 | if (regdom_changes(last_request->alpha2)) |
5eebade6 LR |
1326 | return -EAGAIN; |
1327 | } | |
1328 | ||
e74b1e7f | 1329 | if (!is_old_static_regdom(cfg80211_regdomain) && |
2f92cd2e | 1330 | !regdom_changes(pending_request->alpha2)) |
e74b1e7f LR |
1331 | return -EALREADY; |
1332 | ||
84fa4f43 JB |
1333 | return 0; |
1334 | } | |
1335 | ||
1336 | return -EINVAL; | |
1337 | } | |
1338 | ||
d1c96a9a LR |
1339 | /** |
1340 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1341 | * @wiphy: if the hint comes from country information from an AP, this | |
1342 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1343 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1344 | * |
1345 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1346 | * what it believes should be the current regulatory domain. |
d1c96a9a LR |
1347 | * |
1348 | * Returns zero if all went fine, %-EALREADY if a regulatory domain had | |
1349 | * already been set or other standard error codes. | |
1350 | * | |
1351 | * Caller must hold &cfg80211_mutex | |
1352 | */ | |
28da32d7 LR |
1353 | static int __regulatory_hint(struct wiphy *wiphy, |
1354 | struct regulatory_request *pending_request) | |
b2e1b302 | 1355 | { |
9c96477d | 1356 | bool intersect = false; |
b2e1b302 LR |
1357 | int r = 0; |
1358 | ||
761cf7ec LR |
1359 | assert_cfg80211_lock(); |
1360 | ||
2f92cd2e | 1361 | r = ignore_request(wiphy, pending_request); |
9c96477d | 1362 | |
3e0c3ff3 | 1363 | if (r == REG_INTERSECT) { |
28da32d7 | 1364 | if (pending_request->initiator == REGDOM_SET_BY_DRIVER) { |
3e0c3ff3 | 1365 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
d951c1dd LR |
1366 | if (r) { |
1367 | kfree(pending_request); | |
3e0c3ff3 | 1368 | return r; |
d951c1dd | 1369 | } |
3e0c3ff3 | 1370 | } |
9c96477d | 1371 | intersect = true; |
3e0c3ff3 | 1372 | } else if (r) { |
fb1fc7ad LR |
1373 | /* |
1374 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1375 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1376 | * wiphy |
1377 | */ | |
28da32d7 LR |
1378 | if (r == -EALREADY && |
1379 | pending_request->initiator == REGDOM_SET_BY_DRIVER) { | |
3e0c3ff3 | 1380 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
d951c1dd LR |
1381 | if (r) { |
1382 | kfree(pending_request); | |
3e0c3ff3 | 1383 | return r; |
d951c1dd | 1384 | } |
3e0c3ff3 LR |
1385 | r = -EALREADY; |
1386 | goto new_request; | |
1387 | } | |
d951c1dd | 1388 | kfree(pending_request); |
b2e1b302 | 1389 | return r; |
3e0c3ff3 | 1390 | } |
b2e1b302 | 1391 | |
3e0c3ff3 | 1392 | new_request: |
d951c1dd | 1393 | kfree(last_request); |
5203cdb6 | 1394 | |
d951c1dd LR |
1395 | last_request = pending_request; |
1396 | last_request->intersect = intersect; | |
5203cdb6 | 1397 | |
d951c1dd | 1398 | pending_request = NULL; |
3e0c3ff3 LR |
1399 | |
1400 | /* When r == REG_INTERSECT we do need to call CRDA */ | |
1401 | if (r < 0) | |
1402 | return r; | |
1403 | ||
3f2355cb LR |
1404 | /* |
1405 | * Note: When CONFIG_WIRELESS_OLD_REGULATORY is enabled | |
1406 | * AND if CRDA is NOT present nothing will happen, if someone | |
1407 | * wants to bother with 11d with OLD_REG you can add a timer. | |
1408 | * If after x amount of time nothing happens you can call: | |
1409 | * | |
1410 | * return set_regdom(country_ie_regdomain); | |
1411 | * | |
1412 | * to intersect with the static rd | |
1413 | */ | |
d951c1dd | 1414 | return call_crda(last_request->alpha2); |
b2e1b302 LR |
1415 | } |
1416 | ||
fe33eb39 | 1417 | /* This currently only processes user and driver regulatory hints */ |
d951c1dd | 1418 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 LR |
1419 | { |
1420 | int r = 0; | |
1421 | struct wiphy *wiphy = NULL; | |
1422 | ||
1423 | BUG_ON(!reg_request->alpha2); | |
1424 | ||
1425 | mutex_lock(&cfg80211_mutex); | |
1426 | ||
1427 | if (wiphy_idx_valid(reg_request->wiphy_idx)) | |
1428 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); | |
1429 | ||
1430 | if (reg_request->initiator == REGDOM_SET_BY_DRIVER && | |
1431 | !wiphy) { | |
d951c1dd | 1432 | kfree(reg_request); |
fe33eb39 LR |
1433 | goto out; |
1434 | } | |
1435 | ||
28da32d7 | 1436 | r = __regulatory_hint(wiphy, reg_request); |
fe33eb39 LR |
1437 | /* This is required so that the orig_* parameters are saved */ |
1438 | if (r == -EALREADY && wiphy && wiphy->strict_regulatory) | |
1439 | wiphy_update_regulatory(wiphy, reg_request->initiator); | |
1440 | out: | |
1441 | mutex_unlock(&cfg80211_mutex); | |
fe33eb39 LR |
1442 | } |
1443 | ||
e38f8a7a | 1444 | /* Processes regulatory hints, this is all the REGDOM_SET_BY_* */ |
fe33eb39 LR |
1445 | static void reg_process_pending_hints(void) |
1446 | { | |
1447 | struct regulatory_request *reg_request; | |
fe33eb39 LR |
1448 | |
1449 | spin_lock(®_requests_lock); | |
1450 | while (!list_empty(®_requests_list)) { | |
1451 | reg_request = list_first_entry(®_requests_list, | |
1452 | struct regulatory_request, | |
1453 | list); | |
1454 | list_del_init(®_request->list); | |
fe33eb39 | 1455 | |
d951c1dd LR |
1456 | spin_unlock(®_requests_lock); |
1457 | reg_process_hint(reg_request); | |
fe33eb39 LR |
1458 | spin_lock(®_requests_lock); |
1459 | } | |
1460 | spin_unlock(®_requests_lock); | |
1461 | } | |
1462 | ||
e38f8a7a LR |
1463 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1464 | static void reg_process_pending_beacon_hints(void) | |
1465 | { | |
1466 | struct cfg80211_registered_device *drv; | |
1467 | struct reg_beacon *pending_beacon, *tmp; | |
1468 | ||
1469 | mutex_lock(&cfg80211_mutex); | |
1470 | ||
1471 | /* This goes through the _pending_ beacon list */ | |
1472 | spin_lock_bh(®_pending_beacons_lock); | |
1473 | ||
1474 | if (list_empty(®_pending_beacons)) { | |
1475 | spin_unlock_bh(®_pending_beacons_lock); | |
1476 | goto out; | |
1477 | } | |
1478 | ||
1479 | list_for_each_entry_safe(pending_beacon, tmp, | |
1480 | ®_pending_beacons, list) { | |
1481 | ||
1482 | list_del_init(&pending_beacon->list); | |
1483 | ||
1484 | /* Applies the beacon hint to current wiphys */ | |
1485 | list_for_each_entry(drv, &cfg80211_drv_list, list) | |
1486 | wiphy_update_new_beacon(&drv->wiphy, pending_beacon); | |
1487 | ||
1488 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1489 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1490 | } | |
1491 | ||
1492 | spin_unlock_bh(®_pending_beacons_lock); | |
1493 | out: | |
1494 | mutex_unlock(&cfg80211_mutex); | |
1495 | } | |
1496 | ||
fe33eb39 LR |
1497 | static void reg_todo(struct work_struct *work) |
1498 | { | |
1499 | reg_process_pending_hints(); | |
e38f8a7a | 1500 | reg_process_pending_beacon_hints(); |
fe33eb39 LR |
1501 | } |
1502 | ||
1503 | static DECLARE_WORK(reg_work, reg_todo); | |
1504 | ||
1505 | static void queue_regulatory_request(struct regulatory_request *request) | |
1506 | { | |
1507 | spin_lock(®_requests_lock); | |
1508 | list_add_tail(&request->list, ®_requests_list); | |
1509 | spin_unlock(®_requests_lock); | |
1510 | ||
1511 | schedule_work(®_work); | |
1512 | } | |
1513 | ||
1514 | /* Core regulatory hint -- happens once during cfg80211_init() */ | |
ba25c141 LR |
1515 | static int regulatory_hint_core(const char *alpha2) |
1516 | { | |
1517 | struct regulatory_request *request; | |
1518 | ||
1519 | BUG_ON(last_request); | |
1520 | ||
1521 | request = kzalloc(sizeof(struct regulatory_request), | |
1522 | GFP_KERNEL); | |
1523 | if (!request) | |
1524 | return -ENOMEM; | |
1525 | ||
1526 | request->alpha2[0] = alpha2[0]; | |
1527 | request->alpha2[1] = alpha2[1]; | |
1528 | request->initiator = REGDOM_SET_BY_CORE; | |
1529 | ||
fe33eb39 | 1530 | queue_regulatory_request(request); |
ba25c141 | 1531 | |
fe33eb39 | 1532 | return 0; |
ba25c141 LR |
1533 | } |
1534 | ||
fe33eb39 LR |
1535 | /* User hints */ |
1536 | int regulatory_hint_user(const char *alpha2) | |
b2e1b302 | 1537 | { |
fe33eb39 LR |
1538 | struct regulatory_request *request; |
1539 | ||
be3d4810 | 1540 | BUG_ON(!alpha2); |
b2e1b302 | 1541 | |
fe33eb39 LR |
1542 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1543 | if (!request) | |
1544 | return -ENOMEM; | |
1545 | ||
1546 | request->wiphy_idx = WIPHY_IDX_STALE; | |
1547 | request->alpha2[0] = alpha2[0]; | |
1548 | request->alpha2[1] = alpha2[1]; | |
1549 | request->initiator = REGDOM_SET_BY_USER, | |
1550 | ||
1551 | queue_regulatory_request(request); | |
1552 | ||
1553 | return 0; | |
1554 | } | |
1555 | ||
1556 | /* Driver hints */ | |
1557 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1558 | { | |
1559 | struct regulatory_request *request; | |
1560 | ||
1561 | BUG_ON(!alpha2); | |
1562 | BUG_ON(!wiphy); | |
1563 | ||
1564 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1565 | if (!request) | |
1566 | return -ENOMEM; | |
1567 | ||
1568 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1569 | ||
1570 | /* Must have registered wiphy first */ | |
1571 | BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); | |
1572 | ||
1573 | request->alpha2[0] = alpha2[0]; | |
1574 | request->alpha2[1] = alpha2[1]; | |
1575 | request->initiator = REGDOM_SET_BY_DRIVER; | |
1576 | ||
1577 | queue_regulatory_request(request); | |
1578 | ||
1579 | return 0; | |
b2e1b302 LR |
1580 | } |
1581 | EXPORT_SYMBOL(regulatory_hint); | |
1582 | ||
3f2355cb LR |
1583 | static bool reg_same_country_ie_hint(struct wiphy *wiphy, |
1584 | u32 country_ie_checksum) | |
1585 | { | |
806a9e39 LR |
1586 | struct wiphy *request_wiphy; |
1587 | ||
761cf7ec LR |
1588 | assert_cfg80211_lock(); |
1589 | ||
806a9e39 LR |
1590 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
1591 | ||
1592 | if (!request_wiphy) | |
3f2355cb | 1593 | return false; |
806a9e39 LR |
1594 | |
1595 | if (likely(request_wiphy != wiphy)) | |
3f2355cb | 1596 | return !country_ie_integrity_changes(country_ie_checksum); |
fb1fc7ad LR |
1597 | /* |
1598 | * We should not have let these through at this point, they | |
3f2355cb | 1599 | * should have been picked up earlier by the first alpha2 check |
fb1fc7ad LR |
1600 | * on the device |
1601 | */ | |
3f2355cb LR |
1602 | if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) |
1603 | return true; | |
1604 | return false; | |
1605 | } | |
1606 | ||
1607 | void regulatory_hint_11d(struct wiphy *wiphy, | |
1608 | u8 *country_ie, | |
1609 | u8 country_ie_len) | |
1610 | { | |
1611 | struct ieee80211_regdomain *rd = NULL; | |
1612 | char alpha2[2]; | |
1613 | u32 checksum = 0; | |
1614 | enum environment_cap env = ENVIRON_ANY; | |
fe33eb39 | 1615 | struct regulatory_request *request; |
3f2355cb | 1616 | |
a1794390 | 1617 | mutex_lock(&cfg80211_mutex); |
3f2355cb | 1618 | |
d335fe63 LR |
1619 | if (unlikely(!last_request)) { |
1620 | mutex_unlock(&cfg80211_mutex); | |
1621 | return; | |
1622 | } | |
1623 | ||
3f2355cb LR |
1624 | /* IE len must be evenly divisible by 2 */ |
1625 | if (country_ie_len & 0x01) | |
1626 | goto out; | |
1627 | ||
1628 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
1629 | goto out; | |
1630 | ||
fb1fc7ad LR |
1631 | /* |
1632 | * Pending country IE processing, this can happen after we | |
3f2355cb | 1633 | * call CRDA and wait for a response if a beacon was received before |
fb1fc7ad LR |
1634 | * we were able to process the last regulatory_hint_11d() call |
1635 | */ | |
3f2355cb LR |
1636 | if (country_ie_regdomain) |
1637 | goto out; | |
1638 | ||
1639 | alpha2[0] = country_ie[0]; | |
1640 | alpha2[1] = country_ie[1]; | |
1641 | ||
1642 | if (country_ie[2] == 'I') | |
1643 | env = ENVIRON_INDOOR; | |
1644 | else if (country_ie[2] == 'O') | |
1645 | env = ENVIRON_OUTDOOR; | |
1646 | ||
fb1fc7ad LR |
1647 | /* |
1648 | * We will run this for *every* beacon processed for the BSSID, so | |
3f2355cb | 1649 | * we optimize an early check to exit out early if we don't have to |
fb1fc7ad LR |
1650 | * do anything |
1651 | */ | |
806a9e39 | 1652 | if (likely(wiphy_idx_valid(last_request->wiphy_idx))) { |
3f2355cb LR |
1653 | struct cfg80211_registered_device *drv_last_ie; |
1654 | ||
806a9e39 LR |
1655 | drv_last_ie = |
1656 | cfg80211_drv_by_wiphy_idx(last_request->wiphy_idx); | |
3f2355cb | 1657 | |
fb1fc7ad LR |
1658 | /* |
1659 | * Lets keep this simple -- we trust the first AP | |
1660 | * after we intersect with CRDA | |
1661 | */ | |
806a9e39 | 1662 | if (likely(&drv_last_ie->wiphy == wiphy)) { |
fb1fc7ad LR |
1663 | /* |
1664 | * Ignore IEs coming in on this wiphy with | |
1665 | * the same alpha2 and environment cap | |
1666 | */ | |
3f2355cb LR |
1667 | if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, |
1668 | alpha2) && | |
1669 | env == drv_last_ie->env)) { | |
1670 | goto out; | |
1671 | } | |
fb1fc7ad LR |
1672 | /* |
1673 | * the wiphy moved on to another BSSID or the AP | |
3f2355cb LR |
1674 | * was reconfigured. XXX: We need to deal with the |
1675 | * case where the user suspends and goes to goes | |
1676 | * to another country, and then gets IEs from an | |
fb1fc7ad LR |
1677 | * AP with different settings |
1678 | */ | |
3f2355cb LR |
1679 | goto out; |
1680 | } else { | |
fb1fc7ad LR |
1681 | /* |
1682 | * Ignore IEs coming in on two separate wiphys with | |
1683 | * the same alpha2 and environment cap | |
1684 | */ | |
3f2355cb LR |
1685 | if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, |
1686 | alpha2) && | |
1687 | env == drv_last_ie->env)) { | |
1688 | goto out; | |
1689 | } | |
1690 | /* We could potentially intersect though */ | |
1691 | goto out; | |
1692 | } | |
1693 | } | |
1694 | ||
1695 | rd = country_ie_2_rd(country_ie, country_ie_len, &checksum); | |
1696 | if (!rd) | |
1697 | goto out; | |
1698 | ||
915278e0 LR |
1699 | /* |
1700 | * This will not happen right now but we leave it here for the | |
3f2355cb LR |
1701 | * the future when we want to add suspend/resume support and having |
1702 | * the user move to another country after doing so, or having the user | |
915278e0 LR |
1703 | * move to another AP. Right now we just trust the first AP. |
1704 | * | |
1705 | * If we hit this before we add this support we want to be informed of | |
1706 | * it as it would indicate a mistake in the current design | |
1707 | */ | |
1708 | if (WARN_ON(reg_same_country_ie_hint(wiphy, checksum))) | |
0441d6ff | 1709 | goto free_rd_out; |
3f2355cb | 1710 | |
fe33eb39 LR |
1711 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1712 | if (!request) | |
1713 | goto free_rd_out; | |
1714 | ||
fb1fc7ad LR |
1715 | /* |
1716 | * We keep this around for when CRDA comes back with a response so | |
1717 | * we can intersect with that | |
1718 | */ | |
3f2355cb LR |
1719 | country_ie_regdomain = rd; |
1720 | ||
fe33eb39 LR |
1721 | request->wiphy_idx = get_wiphy_idx(wiphy); |
1722 | request->alpha2[0] = rd->alpha2[0]; | |
1723 | request->alpha2[1] = rd->alpha2[1]; | |
1724 | request->initiator = REGDOM_SET_BY_COUNTRY_IE; | |
1725 | request->country_ie_checksum = checksum; | |
1726 | request->country_ie_env = env; | |
1727 | ||
1728 | mutex_unlock(&cfg80211_mutex); | |
3f2355cb | 1729 | |
fe33eb39 LR |
1730 | queue_regulatory_request(request); |
1731 | ||
1732 | return; | |
0441d6ff LR |
1733 | |
1734 | free_rd_out: | |
1735 | kfree(rd); | |
3f2355cb | 1736 | out: |
a1794390 | 1737 | mutex_unlock(&cfg80211_mutex); |
3f2355cb LR |
1738 | } |
1739 | EXPORT_SYMBOL(regulatory_hint_11d); | |
b2e1b302 | 1740 | |
e38f8a7a LR |
1741 | static bool freq_is_chan_12_13_14(u16 freq) |
1742 | { | |
1743 | if (freq == ieee80211_channel_to_frequency(12) || | |
1744 | freq == ieee80211_channel_to_frequency(13) || | |
1745 | freq == ieee80211_channel_to_frequency(14)) | |
1746 | return true; | |
1747 | return false; | |
1748 | } | |
1749 | ||
1750 | int regulatory_hint_found_beacon(struct wiphy *wiphy, | |
1751 | struct ieee80211_channel *beacon_chan, | |
1752 | gfp_t gfp) | |
1753 | { | |
1754 | struct reg_beacon *reg_beacon; | |
1755 | ||
1756 | if (likely((beacon_chan->beacon_found || | |
1757 | (beacon_chan->flags & IEEE80211_CHAN_RADAR) || | |
1758 | (beacon_chan->band == IEEE80211_BAND_2GHZ && | |
1759 | !freq_is_chan_12_13_14(beacon_chan->center_freq))))) | |
1760 | return 0; | |
1761 | ||
1762 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
1763 | if (!reg_beacon) | |
1764 | return -ENOMEM; | |
1765 | ||
1766 | #ifdef CONFIG_CFG80211_REG_DEBUG | |
1767 | printk(KERN_DEBUG "cfg80211: Found new beacon on " | |
1768 | "frequency: %d MHz (Ch %d) on %s\n", | |
1769 | beacon_chan->center_freq, | |
1770 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
1771 | wiphy_name(wiphy)); | |
1772 | #endif | |
1773 | memcpy(®_beacon->chan, beacon_chan, | |
1774 | sizeof(struct ieee80211_channel)); | |
1775 | ||
1776 | ||
1777 | /* | |
1778 | * Since we can be called from BH or and non-BH context | |
1779 | * we must use spin_lock_bh() | |
1780 | */ | |
1781 | spin_lock_bh(®_pending_beacons_lock); | |
1782 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
1783 | spin_unlock_bh(®_pending_beacons_lock); | |
1784 | ||
1785 | schedule_work(®_work); | |
1786 | ||
1787 | return 0; | |
1788 | } | |
1789 | ||
a3d2eaf0 | 1790 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1791 | { |
1792 | unsigned int i; | |
a3d2eaf0 JB |
1793 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1794 | const struct ieee80211_freq_range *freq_range = NULL; | |
1795 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 LR |
1796 | |
1797 | printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), " | |
1798 | "(max_antenna_gain, max_eirp)\n"); | |
1799 | ||
1800 | for (i = 0; i < rd->n_reg_rules; i++) { | |
1801 | reg_rule = &rd->reg_rules[i]; | |
1802 | freq_range = ®_rule->freq_range; | |
1803 | power_rule = ®_rule->power_rule; | |
1804 | ||
fb1fc7ad LR |
1805 | /* |
1806 | * There may not be documentation for max antenna gain | |
1807 | * in certain regions | |
1808 | */ | |
b2e1b302 LR |
1809 | if (power_rule->max_antenna_gain) |
1810 | printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " | |
1811 | "(%d mBi, %d mBm)\n", | |
1812 | freq_range->start_freq_khz, | |
1813 | freq_range->end_freq_khz, | |
1814 | freq_range->max_bandwidth_khz, | |
1815 | power_rule->max_antenna_gain, | |
1816 | power_rule->max_eirp); | |
1817 | else | |
1818 | printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " | |
1819 | "(N/A, %d mBm)\n", | |
1820 | freq_range->start_freq_khz, | |
1821 | freq_range->end_freq_khz, | |
1822 | freq_range->max_bandwidth_khz, | |
1823 | power_rule->max_eirp); | |
1824 | } | |
1825 | } | |
1826 | ||
a3d2eaf0 | 1827 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1828 | { |
1829 | ||
3f2355cb | 1830 | if (is_intersected_alpha2(rd->alpha2)) { |
3f2355cb LR |
1831 | |
1832 | if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { | |
806a9e39 LR |
1833 | struct cfg80211_registered_device *drv; |
1834 | drv = cfg80211_drv_by_wiphy_idx( | |
1835 | last_request->wiphy_idx); | |
1836 | if (drv) { | |
3f2355cb LR |
1837 | printk(KERN_INFO "cfg80211: Current regulatory " |
1838 | "domain updated by AP to: %c%c\n", | |
1839 | drv->country_ie_alpha2[0], | |
1840 | drv->country_ie_alpha2[1]); | |
1841 | } else | |
1842 | printk(KERN_INFO "cfg80211: Current regulatory " | |
1843 | "domain intersected: \n"); | |
1844 | } else | |
1845 | printk(KERN_INFO "cfg80211: Current regulatory " | |
039498c6 | 1846 | "domain intersected: \n"); |
3f2355cb | 1847 | } else if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
1848 | printk(KERN_INFO "cfg80211: World regulatory " |
1849 | "domain updated:\n"); | |
1850 | else { | |
1851 | if (is_unknown_alpha2(rd->alpha2)) | |
1852 | printk(KERN_INFO "cfg80211: Regulatory domain " | |
1853 | "changed to driver built-in settings " | |
1854 | "(unknown country)\n"); | |
1855 | else | |
1856 | printk(KERN_INFO "cfg80211: Regulatory domain " | |
1857 | "changed to country: %c%c\n", | |
1858 | rd->alpha2[0], rd->alpha2[1]); | |
1859 | } | |
1860 | print_rd_rules(rd); | |
1861 | } | |
1862 | ||
2df78167 | 1863 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1864 | { |
1865 | printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", | |
1866 | rd->alpha2[0], rd->alpha2[1]); | |
1867 | print_rd_rules(rd); | |
1868 | } | |
1869 | ||
3f2355cb LR |
1870 | #ifdef CONFIG_CFG80211_REG_DEBUG |
1871 | static void reg_country_ie_process_debug( | |
1872 | const struct ieee80211_regdomain *rd, | |
1873 | const struct ieee80211_regdomain *country_ie_regdomain, | |
1874 | const struct ieee80211_regdomain *intersected_rd) | |
1875 | { | |
1876 | printk(KERN_DEBUG "cfg80211: Received country IE:\n"); | |
1877 | print_regdomain_info(country_ie_regdomain); | |
1878 | printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); | |
1879 | print_regdomain_info(rd); | |
1880 | if (intersected_rd) { | |
1881 | printk(KERN_DEBUG "cfg80211: We intersect both of these " | |
1882 | "and get:\n"); | |
667ecd01 | 1883 | print_regdomain_info(intersected_rd); |
3f2355cb LR |
1884 | return; |
1885 | } | |
1886 | printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); | |
1887 | } | |
1888 | #else | |
1889 | static inline void reg_country_ie_process_debug( | |
1890 | const struct ieee80211_regdomain *rd, | |
1891 | const struct ieee80211_regdomain *country_ie_regdomain, | |
1892 | const struct ieee80211_regdomain *intersected_rd) | |
1893 | { | |
1894 | } | |
1895 | #endif | |
1896 | ||
d2372b31 | 1897 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 1898 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 1899 | { |
9c96477d | 1900 | const struct ieee80211_regdomain *intersected_rd = NULL; |
3f2355cb | 1901 | struct cfg80211_registered_device *drv = NULL; |
806a9e39 | 1902 | struct wiphy *request_wiphy; |
b2e1b302 LR |
1903 | /* Some basic sanity checks first */ |
1904 | ||
b2e1b302 | 1905 | if (is_world_regdom(rd->alpha2)) { |
f6037d09 | 1906 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
1907 | return -EINVAL; |
1908 | update_world_regdomain(rd); | |
1909 | return 0; | |
1910 | } | |
b2e1b302 LR |
1911 | |
1912 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
1913 | !is_unknown_alpha2(rd->alpha2)) | |
1914 | return -EINVAL; | |
1915 | ||
f6037d09 | 1916 | if (!last_request) |
b2e1b302 LR |
1917 | return -EINVAL; |
1918 | ||
fb1fc7ad LR |
1919 | /* |
1920 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 1921 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
1922 | * and the pending request came in from a country IE |
1923 | */ | |
3f2355cb | 1924 | if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
1925 | /* |
1926 | * If someone else asked us to change the rd lets only bother | |
1927 | * checking if the alpha2 changes if CRDA was already called | |
1928 | */ | |
3f2355cb | 1929 | if (!is_old_static_regdom(cfg80211_regdomain) && |
69b1572b | 1930 | !regdom_changes(rd->alpha2)) |
3f2355cb LR |
1931 | return -EINVAL; |
1932 | } | |
1933 | ||
fb1fc7ad LR |
1934 | /* |
1935 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
1936 | * and finally inform them of what we have done, in case they want |
1937 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
1938 | * internal EEPROM data |
1939 | */ | |
b2e1b302 | 1940 | |
f6037d09 | 1941 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
1942 | return -EINVAL; |
1943 | ||
8375af3b LR |
1944 | if (!is_valid_rd(rd)) { |
1945 | printk(KERN_ERR "cfg80211: Invalid " | |
1946 | "regulatory domain detected:\n"); | |
1947 | print_regdomain_info(rd); | |
1948 | return -EINVAL; | |
b2e1b302 LR |
1949 | } |
1950 | ||
806a9e39 LR |
1951 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
1952 | ||
b8295acd | 1953 | if (!last_request->intersect) { |
3e0c3ff3 LR |
1954 | int r; |
1955 | ||
1956 | if (last_request->initiator != REGDOM_SET_BY_DRIVER) { | |
1957 | reset_regdomains(); | |
1958 | cfg80211_regdomain = rd; | |
1959 | return 0; | |
1960 | } | |
1961 | ||
fb1fc7ad LR |
1962 | /* |
1963 | * For a driver hint, lets copy the regulatory domain the | |
1964 | * driver wanted to the wiphy to deal with conflicts | |
1965 | */ | |
3e0c3ff3 | 1966 | |
806a9e39 | 1967 | BUG_ON(request_wiphy->regd); |
3e0c3ff3 | 1968 | |
806a9e39 | 1969 | r = reg_copy_regd(&request_wiphy->regd, rd); |
3e0c3ff3 LR |
1970 | if (r) |
1971 | return r; | |
1972 | ||
b8295acd LR |
1973 | reset_regdomains(); |
1974 | cfg80211_regdomain = rd; | |
1975 | return 0; | |
1976 | } | |
1977 | ||
1978 | /* Intersection requires a bit more work */ | |
1979 | ||
1980 | if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) { | |
1981 | ||
9c96477d LR |
1982 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
1983 | if (!intersected_rd) | |
1984 | return -EINVAL; | |
b8295acd | 1985 | |
fb1fc7ad LR |
1986 | /* |
1987 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 1988 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
1989 | * domain we keep it for its private use |
1990 | */ | |
3e0c3ff3 | 1991 | if (last_request->initiator == REGDOM_SET_BY_DRIVER) |
806a9e39 | 1992 | request_wiphy->regd = rd; |
3e0c3ff3 LR |
1993 | else |
1994 | kfree(rd); | |
1995 | ||
b8295acd LR |
1996 | rd = NULL; |
1997 | ||
1998 | reset_regdomains(); | |
1999 | cfg80211_regdomain = intersected_rd; | |
2000 | ||
2001 | return 0; | |
9c96477d LR |
2002 | } |
2003 | ||
3f2355cb LR |
2004 | /* |
2005 | * Country IE requests are handled a bit differently, we intersect | |
2006 | * the country IE rd with what CRDA believes that country should have | |
2007 | */ | |
2008 | ||
2009 | BUG_ON(!country_ie_regdomain); | |
2010 | ||
2011 | if (rd != country_ie_regdomain) { | |
fb1fc7ad LR |
2012 | /* |
2013 | * Intersect what CRDA returned and our what we | |
2014 | * had built from the Country IE received | |
2015 | */ | |
3f2355cb LR |
2016 | |
2017 | intersected_rd = regdom_intersect(rd, country_ie_regdomain); | |
2018 | ||
2019 | reg_country_ie_process_debug(rd, country_ie_regdomain, | |
2020 | intersected_rd); | |
2021 | ||
2022 | kfree(country_ie_regdomain); | |
2023 | country_ie_regdomain = NULL; | |
2024 | } else { | |
fb1fc7ad LR |
2025 | /* |
2026 | * This would happen when CRDA was not present and | |
3f2355cb | 2027 | * OLD_REGULATORY was enabled. We intersect our Country |
fb1fc7ad LR |
2028 | * IE rd and what was set on cfg80211 originally |
2029 | */ | |
3f2355cb LR |
2030 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
2031 | } | |
2032 | ||
2033 | if (!intersected_rd) | |
2034 | return -EINVAL; | |
2035 | ||
806a9e39 | 2036 | drv = wiphy_to_dev(request_wiphy); |
3f2355cb LR |
2037 | |
2038 | drv->country_ie_alpha2[0] = rd->alpha2[0]; | |
2039 | drv->country_ie_alpha2[1] = rd->alpha2[1]; | |
2040 | drv->env = last_request->country_ie_env; | |
2041 | ||
2042 | BUG_ON(intersected_rd == rd); | |
2043 | ||
2044 | kfree(rd); | |
2045 | rd = NULL; | |
2046 | ||
b8295acd | 2047 | reset_regdomains(); |
3f2355cb | 2048 | cfg80211_regdomain = intersected_rd; |
b2e1b302 LR |
2049 | |
2050 | return 0; | |
2051 | } | |
2052 | ||
2053 | ||
fb1fc7ad LR |
2054 | /* |
2055 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2056 | * multiple drivers can be ironed out later. Caller must've already |
fb1fc7ad LR |
2057 | * kmalloc'd the rd structure. Caller must hold cfg80211_mutex |
2058 | */ | |
a3d2eaf0 | 2059 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2060 | { |
b2e1b302 LR |
2061 | int r; |
2062 | ||
761cf7ec LR |
2063 | assert_cfg80211_lock(); |
2064 | ||
b2e1b302 LR |
2065 | /* Note that this doesn't update the wiphys, this is done below */ |
2066 | r = __set_regdom(rd); | |
d2372b31 JB |
2067 | if (r) { |
2068 | kfree(rd); | |
b2e1b302 | 2069 | return r; |
d2372b31 | 2070 | } |
b2e1b302 | 2071 | |
b2e1b302 | 2072 | /* This would make this whole thing pointless */ |
a01ddafd LR |
2073 | if (!last_request->intersect) |
2074 | BUG_ON(rd != cfg80211_regdomain); | |
b2e1b302 LR |
2075 | |
2076 | /* update all wiphys now with the new established regulatory domain */ | |
f6037d09 | 2077 | update_all_wiphy_regulatory(last_request->initiator); |
b2e1b302 | 2078 | |
a01ddafd | 2079 | print_regdomain(cfg80211_regdomain); |
b2e1b302 LR |
2080 | |
2081 | return r; | |
2082 | } | |
2083 | ||
a1794390 | 2084 | /* Caller must hold cfg80211_mutex */ |
3f2355cb LR |
2085 | void reg_device_remove(struct wiphy *wiphy) |
2086 | { | |
806a9e39 LR |
2087 | struct wiphy *request_wiphy; |
2088 | ||
761cf7ec LR |
2089 | assert_cfg80211_lock(); |
2090 | ||
806a9e39 LR |
2091 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
2092 | ||
3e0c3ff3 | 2093 | kfree(wiphy->regd); |
806a9e39 | 2094 | if (!last_request || !request_wiphy) |
3f2355cb | 2095 | return; |
806a9e39 | 2096 | if (request_wiphy != wiphy) |
3f2355cb | 2097 | return; |
806a9e39 | 2098 | last_request->wiphy_idx = WIPHY_IDX_STALE; |
3f2355cb LR |
2099 | last_request->country_ie_env = ENVIRON_ANY; |
2100 | } | |
2101 | ||
b2e1b302 LR |
2102 | int regulatory_init(void) |
2103 | { | |
bcf4f99b | 2104 | int err = 0; |
734366de | 2105 | |
b2e1b302 LR |
2106 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2107 | if (IS_ERR(reg_pdev)) | |
2108 | return PTR_ERR(reg_pdev); | |
734366de | 2109 | |
fe33eb39 | 2110 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2111 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2112 | |
734366de | 2113 | #ifdef CONFIG_WIRELESS_OLD_REGULATORY |
a3d2eaf0 | 2114 | cfg80211_regdomain = static_regdom(ieee80211_regdom); |
734366de | 2115 | |
942b25cf | 2116 | printk(KERN_INFO "cfg80211: Using static regulatory domain info\n"); |
734366de | 2117 | print_regdomain_info(cfg80211_regdomain); |
fb1fc7ad LR |
2118 | /* |
2119 | * The old code still requests for a new regdomain and if | |
734366de JB |
2120 | * you have CRDA you get it updated, otherwise you get |
2121 | * stuck with the static values. We ignore "EU" code as | |
fb1fc7ad LR |
2122 | * that is not a valid ISO / IEC 3166 alpha2 |
2123 | */ | |
ac9440a4 | 2124 | if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U') |
ba25c141 | 2125 | err = regulatory_hint_core(ieee80211_regdom); |
734366de | 2126 | #else |
a3d2eaf0 | 2127 | cfg80211_regdomain = cfg80211_world_regdom; |
734366de | 2128 | |
ba25c141 | 2129 | err = regulatory_hint_core("00"); |
bcf4f99b | 2130 | #endif |
ba25c141 | 2131 | if (err) { |
bcf4f99b LR |
2132 | if (err == -ENOMEM) |
2133 | return err; | |
2134 | /* | |
2135 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2136 | * memory which is handled and propagated appropriately above | |
2137 | * but it can also fail during a netlink_broadcast() or during | |
2138 | * early boot for call_usermodehelper(). For now treat these | |
2139 | * errors as non-fatal. | |
2140 | */ | |
2141 | printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " | |
2142 | "to call CRDA during init"); | |
2143 | #ifdef CONFIG_CFG80211_REG_DEBUG | |
2144 | /* We want to find out exactly why when debugging */ | |
2145 | WARN_ON(err); | |
734366de | 2146 | #endif |
bcf4f99b | 2147 | } |
734366de | 2148 | |
b2e1b302 LR |
2149 | return 0; |
2150 | } | |
2151 | ||
2152 | void regulatory_exit(void) | |
2153 | { | |
fe33eb39 | 2154 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2155 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2156 | |
2157 | cancel_work_sync(®_work); | |
2158 | ||
a1794390 | 2159 | mutex_lock(&cfg80211_mutex); |
734366de | 2160 | |
b2e1b302 | 2161 | reset_regdomains(); |
734366de | 2162 | |
3f2355cb LR |
2163 | kfree(country_ie_regdomain); |
2164 | country_ie_regdomain = NULL; | |
2165 | ||
f6037d09 JB |
2166 | kfree(last_request); |
2167 | ||
b2e1b302 | 2168 | platform_device_unregister(reg_pdev); |
734366de | 2169 | |
e38f8a7a LR |
2170 | spin_lock_bh(®_pending_beacons_lock); |
2171 | if (!list_empty(®_pending_beacons)) { | |
2172 | list_for_each_entry_safe(reg_beacon, btmp, | |
2173 | ®_pending_beacons, list) { | |
2174 | list_del(®_beacon->list); | |
2175 | kfree(reg_beacon); | |
2176 | } | |
2177 | } | |
2178 | spin_unlock_bh(®_pending_beacons_lock); | |
2179 | ||
2180 | if (!list_empty(®_beacon_list)) { | |
2181 | list_for_each_entry_safe(reg_beacon, btmp, | |
2182 | ®_beacon_list, list) { | |
2183 | list_del(®_beacon->list); | |
2184 | kfree(reg_beacon); | |
2185 | } | |
2186 | } | |
2187 | ||
fe33eb39 LR |
2188 | spin_lock(®_requests_lock); |
2189 | if (!list_empty(®_requests_list)) { | |
2190 | list_for_each_entry_safe(reg_request, tmp, | |
2191 | ®_requests_list, list) { | |
2192 | list_del(®_request->list); | |
2193 | kfree(reg_request); | |
2194 | } | |
2195 | } | |
2196 | spin_unlock(®_requests_lock); | |
2197 | ||
a1794390 | 2198 | mutex_unlock(&cfg80211_mutex); |
8318d78a | 2199 | } |