blob: 4af4304cec3e7db5177aa576a450a580da1d9651 [file] [log] [blame]
Johannes Berg8318d782008-01-24 19:38:38 +01001/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07005 * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com>
Johannes Berg8318d782008-01-24 19:38:38 +01006 *
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
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -070012/**
13 * DOC: Wireless regulatory infrastructure
Johannes Berg8318d782008-01-24 19:38:38 +010014 *
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 *
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -070020 * 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 *
Johannes Berg8318d782008-01-24 19:38:38 +010034 */
35#include <linux/kernel.h>
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -070036#include <linux/list.h>
37#include <linux/random.h>
38#include <linux/nl80211.h>
39#include <linux/platform_device.h>
Johannes Berg8318d782008-01-24 19:38:38 +010040#include <net/wireless.h>
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -070041#include <net/cfg80211.h>
Johannes Berg8318d782008-01-24 19:38:38 +010042#include "core.h"
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -070043#include "reg.h"
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -040044#include "nl80211.h"
Johannes Berg8318d782008-01-24 19:38:38 +010045
Luis R. Rodriguez5166ccd2008-10-30 13:33:56 -070046/* Receipt of information from last regulatory request */
Johannes Bergf6037d02008-10-21 11:01:33 +020047static struct regulatory_request *last_request;
Johannes Berg734366d2008-09-15 10:56:48 +020048
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -070049/* To trigger userspace events */
50static struct platform_device *reg_pdev;
Johannes Berg8318d782008-01-24 19:38:38 +010051
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -070052/* Keep the ordering from large to small */
53static u32 supported_bandwidths[] = {
54 MHZ_TO_KHZ(40),
55 MHZ_TO_KHZ(20),
Johannes Berg8318d782008-01-24 19:38:38 +010056};
57
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -050058/*
59 * Central wireless core regulatory domains, we only need two,
Johannes Berg734366d2008-09-15 10:56:48 +020060 * the current one and a world regulatory domain in case we have no
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -050061 * information to give us an alpha2
62 */
Luis R. Rodriguezf1303472009-01-30 09:26:42 -080063const struct ieee80211_regdomain *cfg80211_regdomain;
Johannes Berg734366d2008-09-15 10:56:48 +020064
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -050065/*
66 * We use this as a place for the rd structure built from the
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -080067 * last parsed country IE to rest until CRDA gets back to us with
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -050068 * what it thinks should apply for the same country
69 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -080070static const struct ieee80211_regdomain *country_ie_regdomain;
71
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -050072/* Used to queue up regulatory hints */
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -050073static LIST_HEAD(reg_requests_list);
74static spinlock_t reg_requests_lock;
75
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -050076/* Used to queue up beacon hints for review */
77static LIST_HEAD(reg_pending_beacons);
78static spinlock_t reg_pending_beacons_lock;
79
80/* Used to keep track of processed beacon hints */
81static LIST_HEAD(reg_beacon_list);
82
83struct reg_beacon {
84 struct list_head list;
85 struct ieee80211_channel chan;
86};
87
Johannes Berg734366d2008-09-15 10:56:48 +020088/* We keep a static world regulatory domain in case of the absence of CRDA */
89static const struct ieee80211_regdomain world_regdom = {
Luis R. Rodriguez611b6a82009-03-05 21:19:21 -080090 .n_reg_rules = 5,
Johannes Berg734366d2008-09-15 10:56:48 +020091 .alpha2 = "00",
92 .reg_rules = {
Luis R. Rodriguez68798a62009-02-21 00:20:37 -050093 /* IEEE 802.11b/g, channels 1..11 */
94 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
Luis R. Rodriguez611b6a82009-03-05 21:19:21 -080095 /* IEEE 802.11b/g, channels 12..13. No HT40
96 * channel fits here. */
97 REG_RULE(2467-10, 2472+10, 20, 6, 20,
Luis R. Rodriguez3fc71f72009-02-21 00:20:38 -050098 NL80211_RRF_PASSIVE_SCAN |
99 NL80211_RRF_NO_IBSS),
Luis R. Rodriguez611b6a82009-03-05 21:19:21 -0800100 /* IEEE 802.11 channel 14 - Only JP enables
101 * this and for 802.11b only */
102 REG_RULE(2484-10, 2484+10, 20, 6, 20,
103 NL80211_RRF_PASSIVE_SCAN |
104 NL80211_RRF_NO_IBSS |
105 NL80211_RRF_NO_OFDM),
106 /* IEEE 802.11a, channel 36..48 */
Luis R. Rodriguezec329ac2009-03-05 21:19:22 -0800107 REG_RULE(5180-10, 5240+10, 40, 6, 20,
Luis R. Rodriguez611b6a82009-03-05 21:19:21 -0800108 NL80211_RRF_PASSIVE_SCAN |
109 NL80211_RRF_NO_IBSS),
Luis R. Rodriguez3fc71f72009-02-21 00:20:38 -0500110
111 /* NB: 5260 MHz - 5700 MHz requies DFS */
112
113 /* IEEE 802.11a, channel 149..165 */
Luis R. Rodriguezec329ac2009-03-05 21:19:22 -0800114 REG_RULE(5745-10, 5825+10, 40, 6, 20,
Luis R. Rodriguez3fc71f72009-02-21 00:20:38 -0500115 NL80211_RRF_PASSIVE_SCAN |
116 NL80211_RRF_NO_IBSS),
Johannes Berg734366d2008-09-15 10:56:48 +0200117 }
118};
119
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200120static const struct ieee80211_regdomain *cfg80211_world_regdom =
121 &world_regdom;
Johannes Berg734366d2008-09-15 10:56:48 +0200122
123#ifdef CONFIG_WIRELESS_OLD_REGULATORY
124static char *ieee80211_regdom = "US";
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -0400125#else
126static char *ieee80211_regdom = "00";
127#endif
128
Johannes Berg734366d2008-09-15 10:56:48 +0200129module_param(ieee80211_regdom, charp, 0444);
130MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
131
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -0400132#ifdef CONFIG_WIRELESS_OLD_REGULATORY
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500133/*
134 * We assume 40 MHz bandwidth for the old regulatory work.
Johannes Berg734366d2008-09-15 10:56:48 +0200135 * We make emphasis we are using the exact same frequencies
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500136 * as before
137 */
Johannes Berg734366d2008-09-15 10:56:48 +0200138
139static const struct ieee80211_regdomain us_regdom = {
140 .n_reg_rules = 6,
141 .alpha2 = "US",
142 .reg_rules = {
143 /* IEEE 802.11b/g, channels 1..11 */
144 REG_RULE(2412-10, 2462+10, 40, 6, 27, 0),
145 /* IEEE 802.11a, channel 36 */
146 REG_RULE(5180-10, 5180+10, 40, 6, 23, 0),
147 /* IEEE 802.11a, channel 40 */
148 REG_RULE(5200-10, 5200+10, 40, 6, 23, 0),
149 /* IEEE 802.11a, channel 44 */
150 REG_RULE(5220-10, 5220+10, 40, 6, 23, 0),
151 /* IEEE 802.11a, channels 48..64 */
152 REG_RULE(5240-10, 5320+10, 40, 6, 23, 0),
153 /* IEEE 802.11a, channels 149..165, outdoor */
154 REG_RULE(5745-10, 5825+10, 40, 6, 30, 0),
155 }
156};
157
158static const struct ieee80211_regdomain jp_regdom = {
159 .n_reg_rules = 3,
160 .alpha2 = "JP",
161 .reg_rules = {
162 /* IEEE 802.11b/g, channels 1..14 */
163 REG_RULE(2412-10, 2484+10, 40, 6, 20, 0),
164 /* IEEE 802.11a, channels 34..48 */
165 REG_RULE(5170-10, 5240+10, 40, 6, 20,
166 NL80211_RRF_PASSIVE_SCAN),
167 /* IEEE 802.11a, channels 52..64 */
168 REG_RULE(5260-10, 5320+10, 40, 6, 20,
169 NL80211_RRF_NO_IBSS |
170 NL80211_RRF_DFS),
171 }
172};
173
174static const struct ieee80211_regdomain eu_regdom = {
175 .n_reg_rules = 6,
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500176 /*
177 * This alpha2 is bogus, we leave it here just for stupid
178 * backward compatibility
179 */
Johannes Berg734366d2008-09-15 10:56:48 +0200180 .alpha2 = "EU",
181 .reg_rules = {
182 /* IEEE 802.11b/g, channels 1..13 */
183 REG_RULE(2412-10, 2472+10, 40, 6, 20, 0),
184 /* IEEE 802.11a, channel 36 */
185 REG_RULE(5180-10, 5180+10, 40, 6, 23,
186 NL80211_RRF_PASSIVE_SCAN),
187 /* IEEE 802.11a, channel 40 */
188 REG_RULE(5200-10, 5200+10, 40, 6, 23,
189 NL80211_RRF_PASSIVE_SCAN),
190 /* IEEE 802.11a, channel 44 */
191 REG_RULE(5220-10, 5220+10, 40, 6, 23,
192 NL80211_RRF_PASSIVE_SCAN),
193 /* IEEE 802.11a, channels 48..64 */
194 REG_RULE(5240-10, 5320+10, 40, 6, 20,
195 NL80211_RRF_NO_IBSS |
196 NL80211_RRF_DFS),
197 /* IEEE 802.11a, channels 100..140 */
198 REG_RULE(5500-10, 5700+10, 40, 6, 30,
199 NL80211_RRF_NO_IBSS |
200 NL80211_RRF_DFS),
201 }
202};
203
204static const struct ieee80211_regdomain *static_regdom(char *alpha2)
205{
206 if (alpha2[0] == 'U' && alpha2[1] == 'S')
207 return &us_regdom;
208 if (alpha2[0] == 'J' && alpha2[1] == 'P')
209 return &jp_regdom;
210 if (alpha2[0] == 'E' && alpha2[1] == 'U')
211 return &eu_regdom;
212 /* Default, as per the old rules */
213 return &us_regdom;
214}
215
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200216static bool is_old_static_regdom(const struct ieee80211_regdomain *rd)
Johannes Berg734366d2008-09-15 10:56:48 +0200217{
218 if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom)
219 return true;
220 return false;
221}
Johannes Berg734366d2008-09-15 10:56:48 +0200222#else
Johannes Berg942b25c2008-09-15 11:26:47 +0200223static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd)
224{
225 return false;
226}
227#endif
228
Johannes Berg734366d2008-09-15 10:56:48 +0200229static void reset_regdomains(void)
230{
Johannes Berg942b25c2008-09-15 11:26:47 +0200231 /* avoid freeing static information or freeing something twice */
232 if (cfg80211_regdomain == cfg80211_world_regdom)
233 cfg80211_regdomain = NULL;
234 if (cfg80211_world_regdom == &world_regdom)
235 cfg80211_world_regdom = NULL;
236 if (cfg80211_regdomain == &world_regdom)
237 cfg80211_regdomain = NULL;
238 if (is_old_static_regdom(cfg80211_regdomain))
239 cfg80211_regdomain = NULL;
240
241 kfree(cfg80211_regdomain);
242 kfree(cfg80211_world_regdom);
Johannes Berg734366d2008-09-15 10:56:48 +0200243
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200244 cfg80211_world_regdom = &world_regdom;
Johannes Berg734366d2008-09-15 10:56:48 +0200245 cfg80211_regdomain = NULL;
246}
247
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500248/*
249 * Dynamic world regulatory domain requested by the wireless
250 * core upon initialization
251 */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200252static void update_world_regdomain(const struct ieee80211_regdomain *rd)
Johannes Berg734366d2008-09-15 10:56:48 +0200253{
Johannes Bergf6037d02008-10-21 11:01:33 +0200254 BUG_ON(!last_request);
Johannes Berg734366d2008-09-15 10:56:48 +0200255
256 reset_regdomains();
257
258 cfg80211_world_regdom = rd;
259 cfg80211_regdomain = rd;
260}
Johannes Berg734366d2008-09-15 10:56:48 +0200261
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200262bool is_world_regdom(const char *alpha2)
Johannes Berg8318d782008-01-24 19:38:38 +0100263{
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700264 if (!alpha2)
265 return false;
266 if (alpha2[0] == '0' && alpha2[1] == '0')
267 return true;
268 return false;
Johannes Berg8318d782008-01-24 19:38:38 +0100269}
270
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200271static bool is_alpha2_set(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700272{
273 if (!alpha2)
274 return false;
275 if (alpha2[0] != 0 && alpha2[1] != 0)
276 return true;
277 return false;
278}
Johannes Berg8318d782008-01-24 19:38:38 +0100279
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700280static bool is_alpha_upper(char letter)
281{
282 /* ASCII A - Z */
283 if (letter >= 65 && letter <= 90)
284 return true;
285 return false;
286}
287
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200288static bool is_unknown_alpha2(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700289{
290 if (!alpha2)
291 return false;
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500292 /*
293 * Special case where regulatory domain was built by driver
294 * but a specific alpha2 cannot be determined
295 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700296 if (alpha2[0] == '9' && alpha2[1] == '9')
297 return true;
298 return false;
299}
300
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800301static bool is_intersected_alpha2(const char *alpha2)
302{
303 if (!alpha2)
304 return false;
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500305 /*
306 * Special case where regulatory domain is the
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800307 * result of an intersection between two regulatory domain
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500308 * structures
309 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800310 if (alpha2[0] == '9' && alpha2[1] == '8')
311 return true;
312 return false;
313}
314
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200315static bool is_an_alpha2(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700316{
317 if (!alpha2)
318 return false;
319 if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1]))
320 return true;
321 return false;
322}
323
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200324static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700325{
326 if (!alpha2_x || !alpha2_y)
327 return false;
328 if (alpha2_x[0] == alpha2_y[0] &&
329 alpha2_x[1] == alpha2_y[1])
330 return true;
331 return false;
332}
333
Luis R. Rodriguez69b15722009-02-21 00:04:33 -0500334static bool regdom_changes(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700335{
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -0500336 assert_cfg80211_lock();
337
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700338 if (!cfg80211_regdomain)
339 return true;
340 if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
341 return false;
342 return true;
343}
344
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800345/**
346 * country_ie_integrity_changes - tells us if the country IE has changed
347 * @checksum: checksum of country IE of fields we are interested in
348 *
349 * If the country IE has not changed you can ignore it safely. This is
350 * useful to determine if two devices are seeing two different country IEs
351 * even on the same alpha2. Note that this will return false if no IE has
352 * been set on the wireless core yet.
353 */
354static bool country_ie_integrity_changes(u32 checksum)
355{
356 /* If no IE has been set then the checksum doesn't change */
357 if (unlikely(!last_request->country_ie_checksum))
358 return false;
359 if (unlikely(last_request->country_ie_checksum != checksum))
360 return true;
361 return false;
362}
363
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500364/*
365 * This lets us keep regulatory code which is updated on a regulatory
366 * basis in userspace.
367 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700368static int call_crda(const char *alpha2)
369{
370 char country_env[9 + 2] = "COUNTRY=";
371 char *envp[] = {
372 country_env,
373 NULL
374 };
375
376 if (!is_world_regdom((char *) alpha2))
377 printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n",
378 alpha2[0], alpha2[1]);
379 else
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700380 printk(KERN_INFO "cfg80211: Calling CRDA to update world "
381 "regulatory domain\n");
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700382
383 country_env[8] = alpha2[0];
384 country_env[9] = alpha2[1];
385
386 return kobject_uevent_env(&reg_pdev->dev.kobj, KOBJ_CHANGE, envp);
387}
388
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700389/* Used by nl80211 before kmalloc'ing our regulatory domain */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200390bool reg_is_valid_request(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700391{
Johannes Bergf6037d02008-10-21 11:01:33 +0200392 if (!last_request)
393 return false;
394
395 return alpha2_equal(last_request->alpha2, alpha2);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700396}
397
398/* Sanity check on a regulatory rule */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200399static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700400{
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200401 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700402 u32 freq_diff;
403
Luis R. Rodriguez91e99002008-11-12 14:21:55 -0800404 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700405 return false;
406
407 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
408 return false;
409
410 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
411
Roel Kluinbd05f282009-03-03 22:55:21 +0100412 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
413 freq_range->max_bandwidth_khz > freq_diff)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700414 return false;
415
416 return true;
417}
418
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200419static bool is_valid_rd(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700420{
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200421 const struct ieee80211_reg_rule *reg_rule = NULL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700422 unsigned int i;
423
424 if (!rd->n_reg_rules)
425 return false;
426
Luis R. Rodriguez88dc1c32008-11-12 14:22:01 -0800427 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
428 return false;
429
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700430 for (i = 0; i < rd->n_reg_rules; i++) {
431 reg_rule = &rd->reg_rules[i];
432 if (!is_valid_reg_rule(reg_rule))
433 return false;
434 }
435
436 return true;
437}
438
439/* Returns value in KHz */
440static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range,
441 u32 freq)
442{
443 unsigned int i;
444 for (i = 0; i < ARRAY_SIZE(supported_bandwidths); i++) {
445 u32 start_freq_khz = freq - supported_bandwidths[i]/2;
446 u32 end_freq_khz = freq + supported_bandwidths[i]/2;
447 if (start_freq_khz >= freq_range->start_freq_khz &&
448 end_freq_khz <= freq_range->end_freq_khz)
449 return supported_bandwidths[i];
450 }
451 return 0;
452}
453
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800454/**
455 * freq_in_rule_band - tells us if a frequency is in a frequency band
456 * @freq_range: frequency rule we want to query
457 * @freq_khz: frequency we are inquiring about
458 *
459 * This lets us know if a specific frequency rule is or is not relevant to
460 * a specific frequency's band. Bands are device specific and artificial
461 * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is
462 * safe for now to assume that a frequency rule should not be part of a
463 * frequency's band if the start freq or end freq are off by more than 2 GHz.
464 * This resolution can be lowered and should be considered as we add
465 * regulatory rule support for other "bands".
466 **/
467static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
468 u32 freq_khz)
469{
470#define ONE_GHZ_IN_KHZ 1000000
471 if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ))
472 return true;
473 if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ))
474 return true;
475 return false;
476#undef ONE_GHZ_IN_KHZ
477}
478
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500479/*
480 * Converts a country IE to a regulatory domain. A regulatory domain
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800481 * structure has a lot of information which the IE doesn't yet have,
482 * so for the other values we use upper max values as we will intersect
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500483 * with our userspace regulatory agent to get lower bounds.
484 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800485static struct ieee80211_regdomain *country_ie_2_rd(
486 u8 *country_ie,
487 u8 country_ie_len,
488 u32 *checksum)
489{
490 struct ieee80211_regdomain *rd = NULL;
491 unsigned int i = 0;
492 char alpha2[2];
493 u32 flags = 0;
494 u32 num_rules = 0, size_of_regd = 0;
495 u8 *triplets_start = NULL;
496 u8 len_at_triplet = 0;
497 /* the last channel we have registered in a subband (triplet) */
498 int last_sub_max_channel = 0;
499
500 *checksum = 0xDEADBEEF;
501
502 /* Country IE requirements */
503 BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN ||
504 country_ie_len & 0x01);
505
506 alpha2[0] = country_ie[0];
507 alpha2[1] = country_ie[1];
508
509 /*
510 * Third octet can be:
511 * 'I' - Indoor
512 * 'O' - Outdoor
513 *
514 * anything else we assume is no restrictions
515 */
516 if (country_ie[2] == 'I')
517 flags = NL80211_RRF_NO_OUTDOOR;
518 else if (country_ie[2] == 'O')
519 flags = NL80211_RRF_NO_INDOOR;
520
521 country_ie += 3;
522 country_ie_len -= 3;
523
524 triplets_start = country_ie;
525 len_at_triplet = country_ie_len;
526
527 *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8);
528
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500529 /*
530 * We need to build a reg rule for each triplet, but first we must
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800531 * calculate the number of reg rules we will need. We will need one
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500532 * for each channel subband
533 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800534 while (country_ie_len >= 3) {
Luis R. Rodriguez615aab42009-01-22 15:05:46 -0800535 int end_channel = 0;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800536 struct ieee80211_country_ie_triplet *triplet =
537 (struct ieee80211_country_ie_triplet *) country_ie;
538 int cur_sub_max_channel = 0, cur_channel = 0;
539
540 if (triplet->ext.reg_extension_id >=
541 IEEE80211_COUNTRY_EXTENSION_ID) {
542 country_ie += 3;
543 country_ie_len -= 3;
544 continue;
545 }
546
Luis R. Rodriguez615aab42009-01-22 15:05:46 -0800547 /* 2 GHz */
548 if (triplet->chans.first_channel <= 14)
549 end_channel = triplet->chans.first_channel +
550 triplet->chans.num_channels;
551 else
552 /*
553 * 5 GHz -- For example in country IEs if the first
554 * channel given is 36 and the number of channels is 4
555 * then the individual channel numbers defined for the
556 * 5 GHz PHY by these parameters are: 36, 40, 44, and 48
557 * and not 36, 37, 38, 39.
558 *
559 * See: http://tinyurl.com/11d-clarification
560 */
561 end_channel = triplet->chans.first_channel +
562 (4 * (triplet->chans.num_channels - 1));
563
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800564 cur_channel = triplet->chans.first_channel;
Luis R. Rodriguez615aab42009-01-22 15:05:46 -0800565 cur_sub_max_channel = end_channel;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800566
567 /* Basic sanity check */
568 if (cur_sub_max_channel < cur_channel)
569 return NULL;
570
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500571 /*
572 * Do not allow overlapping channels. Also channels
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800573 * passed in each subband must be monotonically
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500574 * increasing
575 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800576 if (last_sub_max_channel) {
577 if (cur_channel <= last_sub_max_channel)
578 return NULL;
579 if (cur_sub_max_channel <= last_sub_max_channel)
580 return NULL;
581 }
582
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500583 /*
584 * When dot11RegulatoryClassesRequired is supported
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800585 * we can throw ext triplets as part of this soup,
586 * for now we don't care when those change as we
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500587 * don't support them
588 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800589 *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) |
590 ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) |
591 ((triplet->chans.max_power ^ cur_sub_max_channel) << 24);
592
593 last_sub_max_channel = cur_sub_max_channel;
594
595 country_ie += 3;
596 country_ie_len -= 3;
597 num_rules++;
598
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500599 /*
600 * Note: this is not a IEEE requirement but
601 * simply a memory requirement
602 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800603 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
604 return NULL;
605 }
606
607 country_ie = triplets_start;
608 country_ie_len = len_at_triplet;
609
610 size_of_regd = sizeof(struct ieee80211_regdomain) +
611 (num_rules * sizeof(struct ieee80211_reg_rule));
612
613 rd = kzalloc(size_of_regd, GFP_KERNEL);
614 if (!rd)
615 return NULL;
616
617 rd->n_reg_rules = num_rules;
618 rd->alpha2[0] = alpha2[0];
619 rd->alpha2[1] = alpha2[1];
620
621 /* This time around we fill in the rd */
622 while (country_ie_len >= 3) {
Luis R. Rodriguez02e68a32009-01-07 17:43:37 -0800623 int end_channel = 0;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800624 struct ieee80211_country_ie_triplet *triplet =
625 (struct ieee80211_country_ie_triplet *) country_ie;
626 struct ieee80211_reg_rule *reg_rule = NULL;
627 struct ieee80211_freq_range *freq_range = NULL;
628 struct ieee80211_power_rule *power_rule = NULL;
629
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500630 /*
631 * Must parse if dot11RegulatoryClassesRequired is true,
632 * we don't support this yet
633 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800634 if (triplet->ext.reg_extension_id >=
635 IEEE80211_COUNTRY_EXTENSION_ID) {
636 country_ie += 3;
637 country_ie_len -= 3;
638 continue;
639 }
640
641 reg_rule = &rd->reg_rules[i];
642 freq_range = &reg_rule->freq_range;
643 power_rule = &reg_rule->power_rule;
644
645 reg_rule->flags = flags;
646
Luis R. Rodriguez02e68a32009-01-07 17:43:37 -0800647 /* 2 GHz */
648 if (triplet->chans.first_channel <= 14)
649 end_channel = triplet->chans.first_channel +
650 triplet->chans.num_channels;
651 else
Luis R. Rodriguez02e68a32009-01-07 17:43:37 -0800652 end_channel = triplet->chans.first_channel +
653 (4 * (triplet->chans.num_channels - 1));
654
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500655 /*
656 * The +10 is since the regulatory domain expects
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800657 * the actual band edge, not the center of freq for
658 * its start and end freqs, assuming 20 MHz bandwidth on
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500659 * the channels passed
660 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800661 freq_range->start_freq_khz =
662 MHZ_TO_KHZ(ieee80211_channel_to_frequency(
663 triplet->chans.first_channel) - 10);
664 freq_range->end_freq_khz =
665 MHZ_TO_KHZ(ieee80211_channel_to_frequency(
Luis R. Rodriguez02e68a32009-01-07 17:43:37 -0800666 end_channel) + 10);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800667
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500668 /*
669 * These are large arbitrary values we use to intersect later.
670 * Increment this if we ever support >= 40 MHz channels
671 * in IEEE 802.11
672 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800673 freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40);
674 power_rule->max_antenna_gain = DBI_TO_MBI(100);
675 power_rule->max_eirp = DBM_TO_MBM(100);
676
677 country_ie += 3;
678 country_ie_len -= 3;
679 i++;
680
681 BUG_ON(i > NL80211_MAX_SUPP_REG_RULES);
682 }
683
684 return rd;
685}
686
687
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500688/*
689 * Helper for regdom_intersect(), this does the real
690 * mathematical intersection fun
691 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700692static int reg_rules_intersect(
693 const struct ieee80211_reg_rule *rule1,
694 const struct ieee80211_reg_rule *rule2,
695 struct ieee80211_reg_rule *intersected_rule)
696{
697 const struct ieee80211_freq_range *freq_range1, *freq_range2;
698 struct ieee80211_freq_range *freq_range;
699 const struct ieee80211_power_rule *power_rule1, *power_rule2;
700 struct ieee80211_power_rule *power_rule;
701 u32 freq_diff;
702
703 freq_range1 = &rule1->freq_range;
704 freq_range2 = &rule2->freq_range;
705 freq_range = &intersected_rule->freq_range;
706
707 power_rule1 = &rule1->power_rule;
708 power_rule2 = &rule2->power_rule;
709 power_rule = &intersected_rule->power_rule;
710
711 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
712 freq_range2->start_freq_khz);
713 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
714 freq_range2->end_freq_khz);
715 freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz,
716 freq_range2->max_bandwidth_khz);
717
718 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
719 if (freq_range->max_bandwidth_khz > freq_diff)
720 freq_range->max_bandwidth_khz = freq_diff;
721
722 power_rule->max_eirp = min(power_rule1->max_eirp,
723 power_rule2->max_eirp);
724 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
725 power_rule2->max_antenna_gain);
726
727 intersected_rule->flags = (rule1->flags | rule2->flags);
728
729 if (!is_valid_reg_rule(intersected_rule))
730 return -EINVAL;
731
732 return 0;
733}
734
735/**
736 * regdom_intersect - do the intersection between two regulatory domains
737 * @rd1: first regulatory domain
738 * @rd2: second regulatory domain
739 *
740 * Use this function to get the intersection between two regulatory domains.
741 * Once completed we will mark the alpha2 for the rd as intersected, "98",
742 * as no one single alpha2 can represent this regulatory domain.
743 *
744 * Returns a pointer to the regulatory domain structure which will hold the
745 * resulting intersection of rules between rd1 and rd2. We will
746 * kzalloc() this structure for you.
747 */
748static struct ieee80211_regdomain *regdom_intersect(
749 const struct ieee80211_regdomain *rd1,
750 const struct ieee80211_regdomain *rd2)
751{
752 int r, size_of_regd;
753 unsigned int x, y;
754 unsigned int num_rules = 0, rule_idx = 0;
755 const struct ieee80211_reg_rule *rule1, *rule2;
756 struct ieee80211_reg_rule *intersected_rule;
757 struct ieee80211_regdomain *rd;
758 /* This is just a dummy holder to help us count */
759 struct ieee80211_reg_rule irule;
760
761 /* Uses the stack temporarily for counter arithmetic */
762 intersected_rule = &irule;
763
764 memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule));
765
766 if (!rd1 || !rd2)
767 return NULL;
768
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500769 /*
770 * First we get a count of the rules we'll need, then we actually
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700771 * build them. This is to so we can malloc() and free() a
772 * regdomain once. The reason we use reg_rules_intersect() here
773 * is it will return -EINVAL if the rule computed makes no sense.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500774 * All rules that do check out OK are valid.
775 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700776
777 for (x = 0; x < rd1->n_reg_rules; x++) {
778 rule1 = &rd1->reg_rules[x];
779 for (y = 0; y < rd2->n_reg_rules; y++) {
780 rule2 = &rd2->reg_rules[y];
781 if (!reg_rules_intersect(rule1, rule2,
782 intersected_rule))
783 num_rules++;
784 memset(intersected_rule, 0,
785 sizeof(struct ieee80211_reg_rule));
786 }
787 }
788
789 if (!num_rules)
790 return NULL;
791
792 size_of_regd = sizeof(struct ieee80211_regdomain) +
793 ((num_rules + 1) * sizeof(struct ieee80211_reg_rule));
794
795 rd = kzalloc(size_of_regd, GFP_KERNEL);
796 if (!rd)
797 return NULL;
798
799 for (x = 0; x < rd1->n_reg_rules; x++) {
800 rule1 = &rd1->reg_rules[x];
801 for (y = 0; y < rd2->n_reg_rules; y++) {
802 rule2 = &rd2->reg_rules[y];
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500803 /*
804 * This time around instead of using the stack lets
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700805 * write to the target rule directly saving ourselves
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500806 * a memcpy()
807 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700808 intersected_rule = &rd->reg_rules[rule_idx];
809 r = reg_rules_intersect(rule1, rule2,
810 intersected_rule);
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500811 /*
812 * No need to memset here the intersected rule here as
813 * we're not using the stack anymore
814 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700815 if (r)
816 continue;
817 rule_idx++;
818 }
819 }
820
821 if (rule_idx != num_rules) {
822 kfree(rd);
823 return NULL;
824 }
825
826 rd->n_reg_rules = num_rules;
827 rd->alpha2[0] = '9';
828 rd->alpha2[1] = '8';
829
830 return rd;
831}
832
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500833/*
834 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
835 * want to just have the channel structure use these
836 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700837static u32 map_regdom_flags(u32 rd_flags)
838{
839 u32 channel_flags = 0;
840 if (rd_flags & NL80211_RRF_PASSIVE_SCAN)
841 channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN;
842 if (rd_flags & NL80211_RRF_NO_IBSS)
843 channel_flags |= IEEE80211_CHAN_NO_IBSS;
844 if (rd_flags & NL80211_RRF_DFS)
845 channel_flags |= IEEE80211_CHAN_RADAR;
846 return channel_flags;
847}
848
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -0800849static int freq_reg_info_regd(struct wiphy *wiphy,
850 u32 center_freq,
851 u32 *bandwidth,
852 const struct ieee80211_reg_rule **reg_rule,
853 const struct ieee80211_regdomain *custom_regd)
Johannes Berg8318d782008-01-24 19:38:38 +0100854{
855 int i;
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800856 bool band_rule_found = false;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -0800857 const struct ieee80211_regdomain *regd;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700858 u32 max_bandwidth = 0;
Johannes Berg8318d782008-01-24 19:38:38 +0100859
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -0800860 regd = custom_regd ? custom_regd : cfg80211_regdomain;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -0800861
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500862 /*
863 * Follow the driver's regulatory domain, if present, unless a country
864 * IE has been processed or a user wants to help complaince further
865 */
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -0400866 if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
867 last_request->initiator != NL80211_REGDOM_SET_BY_USER &&
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -0800868 wiphy->regd)
869 regd = wiphy->regd;
870
871 if (!regd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700872 return -EINVAL;
873
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -0800874 for (i = 0; i < regd->n_reg_rules; i++) {
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700875 const struct ieee80211_reg_rule *rr;
876 const struct ieee80211_freq_range *fr = NULL;
877 const struct ieee80211_power_rule *pr = NULL;
878
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -0800879 rr = &regd->reg_rules[i];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700880 fr = &rr->freq_range;
881 pr = &rr->power_rule;
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800882
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500883 /*
884 * We only need to know if one frequency rule was
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800885 * was in center_freq's band, that's enough, so lets
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500886 * not overwrite it once found
887 */
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800888 if (!band_rule_found)
889 band_rule_found = freq_in_rule_band(fr, center_freq);
890
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700891 max_bandwidth = freq_max_bandwidth(fr, center_freq);
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800892
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700893 if (max_bandwidth && *bandwidth <= max_bandwidth) {
894 *reg_rule = rr;
895 *bandwidth = max_bandwidth;
Johannes Berg8318d782008-01-24 19:38:38 +0100896 break;
897 }
898 }
899
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800900 if (!band_rule_found)
901 return -ERANGE;
902
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700903 return !max_bandwidth;
904}
Luis R. Rodriguez34f57342009-01-22 15:05:45 -0800905EXPORT_SYMBOL(freq_reg_info);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700906
Luis R. Rodriguez34f57342009-01-22 15:05:45 -0800907int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth,
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -0800908 const struct ieee80211_reg_rule **reg_rule)
909{
910 return freq_reg_info_regd(wiphy, center_freq,
911 bandwidth, reg_rule, NULL);
912}
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700913
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -0800914static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band,
915 unsigned int chan_idx)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700916{
917 int r;
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -0800918 u32 flags;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700919 u32 max_bandwidth = 0;
920 const struct ieee80211_reg_rule *reg_rule = NULL;
921 const struct ieee80211_power_rule *power_rule = NULL;
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -0800922 struct ieee80211_supported_band *sband;
923 struct ieee80211_channel *chan;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -0500924 struct wiphy *request_wiphy = NULL;
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -0800925
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -0500926 assert_cfg80211_lock();
927
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -0500928 request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
929
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -0800930 sband = wiphy->bands[band];
931 BUG_ON(chan_idx >= sband->n_channels);
932 chan = &sband->channels[chan_idx];
933
934 flags = chan->orig_flags;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700935
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -0800936 r = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq),
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700937 &max_bandwidth, &reg_rule);
938
939 if (r) {
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500940 /*
941 * This means no regulatory rule was found in the country IE
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800942 * with a frequency range on the center_freq's band, since
943 * IEEE-802.11 allows for a country IE to have a subset of the
944 * regulatory information provided in a country we ignore
945 * disabling the channel unless at least one reg rule was
946 * found on the center_freq's band. For details see this
947 * clarification:
948 *
949 * http://tinyurl.com/11d-clarification
950 */
951 if (r == -ERANGE &&
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -0400952 last_request->initiator ==
953 NL80211_REGDOM_SET_BY_COUNTRY_IE) {
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800954#ifdef CONFIG_CFG80211_REG_DEBUG
955 printk(KERN_DEBUG "cfg80211: Leaving channel %d MHz "
956 "intact on %s - no rule found in band on "
957 "Country IE\n",
958 chan->center_freq, wiphy_name(wiphy));
959#endif
960 } else {
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500961 /*
962 * In this case we know the country IE has at least one reg rule
963 * for the band so we respect its band definitions
964 */
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800965#ifdef CONFIG_CFG80211_REG_DEBUG
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -0400966 if (last_request->initiator ==
967 NL80211_REGDOM_SET_BY_COUNTRY_IE)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800968 printk(KERN_DEBUG "cfg80211: Disabling "
969 "channel %d MHz on %s due to "
970 "Country IE\n",
971 chan->center_freq, wiphy_name(wiphy));
972#endif
973 flags |= IEEE80211_CHAN_DISABLED;
974 chan->flags = flags;
975 }
Johannes Berg8318d782008-01-24 19:38:38 +0100976 return;
977 }
978
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700979 power_rule = &reg_rule->power_rule;
980
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -0400981 if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -0500982 request_wiphy && request_wiphy == wiphy &&
983 request_wiphy->strict_regulatory) {
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500984 /*
985 * This gaurantees the driver's requested regulatory domain
Luis R. Rodriguezf9763762009-01-22 15:05:52 -0800986 * will always be used as a base for further regulatory
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500987 * settings
988 */
Luis R. Rodriguezf9763762009-01-22 15:05:52 -0800989 chan->flags = chan->orig_flags =
990 map_regdom_flags(reg_rule->flags);
991 chan->max_antenna_gain = chan->orig_mag =
992 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
993 chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth);
994 chan->max_power = chan->orig_mpwr =
995 (int) MBM_TO_DBM(power_rule->max_eirp);
996 return;
997 }
998
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700999 chan->flags = flags | map_regdom_flags(reg_rule->flags);
Johannes Berg8318d782008-01-24 19:38:38 +01001000 chan->max_antenna_gain = min(chan->orig_mag,
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001001 (int) MBI_TO_DBI(power_rule->max_antenna_gain));
1002 chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth);
John W. Linville253898c2008-04-03 15:32:54 -04001003 if (chan->orig_mpwr)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001004 chan->max_power = min(chan->orig_mpwr,
1005 (int) MBM_TO_DBM(power_rule->max_eirp));
John W. Linville253898c2008-04-03 15:32:54 -04001006 else
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001007 chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp);
Johannes Berg8318d782008-01-24 19:38:38 +01001008}
1009
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001010static void handle_band(struct wiphy *wiphy, enum ieee80211_band band)
Johannes Berg8318d782008-01-24 19:38:38 +01001011{
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001012 unsigned int i;
1013 struct ieee80211_supported_band *sband;
1014
1015 BUG_ON(!wiphy->bands[band]);
1016 sband = wiphy->bands[band];
Johannes Berg8318d782008-01-24 19:38:38 +01001017
1018 for (i = 0; i < sband->n_channels; i++)
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001019 handle_channel(wiphy, band, i);
Johannes Berg8318d782008-01-24 19:38:38 +01001020}
1021
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001022static bool ignore_reg_update(struct wiphy *wiphy,
1023 enum nl80211_reg_initiator initiator)
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001024{
1025 if (!last_request)
1026 return true;
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001027 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
Luis R. Rodriguez2a44f912009-01-22 15:05:49 -08001028 wiphy->custom_regulatory)
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001029 return true;
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001030 /*
1031 * wiphy->regd will be set once the device has its own
1032 * desired regulatory domain set
1033 */
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001034 if (wiphy->strict_regulatory && !wiphy->regd &&
1035 !is_world_regdom(last_request->alpha2))
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001036 return true;
1037 return false;
1038}
1039
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001040static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001041{
1042 struct cfg80211_registered_device *drv;
1043
1044 list_for_each_entry(drv, &cfg80211_drv_list, list)
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001045 wiphy_update_regulatory(&drv->wiphy, initiator);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001046}
1047
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001048static void handle_reg_beacon(struct wiphy *wiphy,
1049 unsigned int chan_idx,
1050 struct reg_beacon *reg_beacon)
1051{
1052#ifdef CONFIG_CFG80211_REG_DEBUG
1053#define REG_DEBUG_BEACON_FLAG(desc) \
1054 printk(KERN_DEBUG "cfg80211: Enabling " desc " on " \
1055 "frequency: %d MHz (Ch %d) on %s\n", \
1056 reg_beacon->chan.center_freq, \
1057 ieee80211_frequency_to_channel(reg_beacon->chan.center_freq), \
1058 wiphy_name(wiphy));
1059#else
1060#define REG_DEBUG_BEACON_FLAG(desc) do {} while (0)
1061#endif
1062 struct ieee80211_supported_band *sband;
1063 struct ieee80211_channel *chan;
1064
1065 assert_cfg80211_lock();
1066
1067 sband = wiphy->bands[reg_beacon->chan.band];
1068 chan = &sband->channels[chan_idx];
1069
1070 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1071 return;
1072
Luis R. Rodrigueza4ed90d2009-04-02 14:08:07 -04001073 if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
1074 !(chan->orig_flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001075 chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
1076 REG_DEBUG_BEACON_FLAG("active scanning");
1077 }
1078
Luis R. Rodrigueza4ed90d2009-04-02 14:08:07 -04001079 if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
1080 !(chan->orig_flags & IEEE80211_CHAN_NO_IBSS)) {
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001081 chan->flags &= ~IEEE80211_CHAN_NO_IBSS;
1082 REG_DEBUG_BEACON_FLAG("beaconing");
1083 }
1084
1085 chan->beacon_found = true;
1086#undef REG_DEBUG_BEACON_FLAG
1087}
1088
1089/*
1090 * Called when a scan on a wiphy finds a beacon on
1091 * new channel
1092 */
1093static void wiphy_update_new_beacon(struct wiphy *wiphy,
1094 struct reg_beacon *reg_beacon)
1095{
1096 unsigned int i;
1097 struct ieee80211_supported_band *sband;
1098
1099 assert_cfg80211_lock();
1100
1101 if (!wiphy->bands[reg_beacon->chan.band])
1102 return;
1103
1104 sband = wiphy->bands[reg_beacon->chan.band];
1105
1106 for (i = 0; i < sband->n_channels; i++)
1107 handle_reg_beacon(wiphy, i, reg_beacon);
1108}
1109
1110/*
1111 * Called upon reg changes or a new wiphy is added
1112 */
1113static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1114{
1115 unsigned int i;
1116 struct ieee80211_supported_band *sband;
1117 struct reg_beacon *reg_beacon;
1118
1119 assert_cfg80211_lock();
1120
1121 if (list_empty(&reg_beacon_list))
1122 return;
1123
1124 list_for_each_entry(reg_beacon, &reg_beacon_list, list) {
1125 if (!wiphy->bands[reg_beacon->chan.band])
1126 continue;
1127 sband = wiphy->bands[reg_beacon->chan.band];
1128 for (i = 0; i < sband->n_channels; i++)
1129 handle_reg_beacon(wiphy, i, reg_beacon);
1130 }
1131}
1132
1133static bool reg_is_world_roaming(struct wiphy *wiphy)
1134{
1135 if (is_world_regdom(cfg80211_regdomain->alpha2) ||
1136 (wiphy->regd && is_world_regdom(wiphy->regd->alpha2)))
1137 return true;
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001138 if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001139 wiphy->custom_regulatory)
1140 return true;
1141 return false;
1142}
1143
1144/* Reap the advantages of previously found beacons */
1145static void reg_process_beacons(struct wiphy *wiphy)
1146{
1147 if (!reg_is_world_roaming(wiphy))
1148 return;
1149 wiphy_update_beacon_reg(wiphy);
1150}
1151
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001152void wiphy_update_regulatory(struct wiphy *wiphy,
1153 enum nl80211_reg_initiator initiator)
Johannes Berg8318d782008-01-24 19:38:38 +01001154{
1155 enum ieee80211_band band;
Luis R. Rodriguezd46e5b12009-01-22 15:05:50 -08001156
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001157 if (ignore_reg_update(wiphy, initiator))
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001158 goto out;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001159 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
Johannes Berg8318d782008-01-24 19:38:38 +01001160 if (wiphy->bands[band])
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001161 handle_band(wiphy, band);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001162 }
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001163out:
1164 reg_process_beacons(wiphy);
Luis R. Rodriguez560e28e2009-01-07 17:43:32 -08001165 if (wiphy->reg_notifier)
Luis R. Rodriguez716f9392009-01-22 15:05:51 -08001166 wiphy->reg_notifier(wiphy, last_request);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001167}
1168
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001169static void handle_channel_custom(struct wiphy *wiphy,
1170 enum ieee80211_band band,
1171 unsigned int chan_idx,
1172 const struct ieee80211_regdomain *regd)
1173{
1174 int r;
1175 u32 max_bandwidth = 0;
1176 const struct ieee80211_reg_rule *reg_rule = NULL;
1177 const struct ieee80211_power_rule *power_rule = NULL;
1178 struct ieee80211_supported_band *sband;
1179 struct ieee80211_channel *chan;
1180
1181 sband = wiphy->bands[band];
1182 BUG_ON(chan_idx >= sband->n_channels);
1183 chan = &sband->channels[chan_idx];
1184
1185 r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq),
1186 &max_bandwidth, &reg_rule, regd);
1187
1188 if (r) {
1189 chan->flags = IEEE80211_CHAN_DISABLED;
1190 return;
1191 }
1192
1193 power_rule = &reg_rule->power_rule;
1194
1195 chan->flags |= map_regdom_flags(reg_rule->flags);
1196 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1197 chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth);
1198 chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp);
1199}
1200
1201static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band,
1202 const struct ieee80211_regdomain *regd)
1203{
1204 unsigned int i;
1205 struct ieee80211_supported_band *sband;
1206
1207 BUG_ON(!wiphy->bands[band]);
1208 sband = wiphy->bands[band];
1209
1210 for (i = 0; i < sband->n_channels; i++)
1211 handle_channel_custom(wiphy, band, i, regd);
1212}
1213
1214/* Used by drivers prior to wiphy registration */
1215void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
1216 const struct ieee80211_regdomain *regd)
1217{
1218 enum ieee80211_band band;
1219 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1220 if (wiphy->bands[band])
1221 handle_band_custom(wiphy, band, regd);
1222 }
1223}
1224EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1225
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001226static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd,
1227 const struct ieee80211_regdomain *src_regd)
1228{
1229 struct ieee80211_regdomain *regd;
1230 int size_of_regd = 0;
1231 unsigned int i;
1232
1233 size_of_regd = sizeof(struct ieee80211_regdomain) +
1234 ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule));
1235
1236 regd = kzalloc(size_of_regd, GFP_KERNEL);
1237 if (!regd)
1238 return -ENOMEM;
1239
1240 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
1241
1242 for (i = 0; i < src_regd->n_reg_rules; i++)
1243 memcpy(&regd->reg_rules[i], &src_regd->reg_rules[i],
1244 sizeof(struct ieee80211_reg_rule));
1245
1246 *dst_regd = regd;
1247 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001248}
1249
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001250/*
1251 * Return value which can be used by ignore_request() to indicate
1252 * it has been determined we should intersect two regulatory domains
1253 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001254#define REG_INTERSECT 1
1255
Johannes Berg84fa4f42008-10-24 20:32:23 +02001256/* This has the logic which determines when a new request
1257 * should be ignored. */
Luis R. Rodriguez2f92cd22009-02-21 00:24:16 -05001258static int ignore_request(struct wiphy *wiphy,
1259 struct regulatory_request *pending_request)
Johannes Berg84fa4f42008-10-24 20:32:23 +02001260{
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001261 struct wiphy *last_wiphy = NULL;
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05001262
1263 assert_cfg80211_lock();
1264
Johannes Berg84fa4f42008-10-24 20:32:23 +02001265 /* All initial requests are respected */
1266 if (!last_request)
1267 return 0;
1268
Luis R. Rodriguez2f92cd22009-02-21 00:24:16 -05001269 switch (pending_request->initiator) {
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001270 case NL80211_REGDOM_SET_BY_CORE:
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05001271 return -EINVAL;
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001272 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001273
1274 last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
1275
Luis R. Rodriguez2f92cd22009-02-21 00:24:16 -05001276 if (unlikely(!is_an_alpha2(pending_request->alpha2)))
Johannes Berg84fa4f42008-10-24 20:32:23 +02001277 return -EINVAL;
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001278 if (last_request->initiator ==
1279 NL80211_REGDOM_SET_BY_COUNTRY_IE) {
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001280 if (last_wiphy != wiphy) {
Johannes Berg84fa4f42008-10-24 20:32:23 +02001281 /*
1282 * Two cards with two APs claiming different
1283 * different Country IE alpha2s. We could
1284 * intersect them, but that seems unlikely
1285 * to be correct. Reject second one for now.
1286 */
Luis R. Rodriguez2f92cd22009-02-21 00:24:16 -05001287 if (regdom_changes(pending_request->alpha2))
Johannes Berg84fa4f42008-10-24 20:32:23 +02001288 return -EOPNOTSUPP;
1289 return -EALREADY;
1290 }
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001291 /*
1292 * Two consecutive Country IE hints on the same wiphy.
1293 * This should be picked up early by the driver/stack
1294 */
Luis R. Rodriguez2f92cd22009-02-21 00:24:16 -05001295 if (WARN_ON(regdom_changes(pending_request->alpha2)))
Johannes Berg84fa4f42008-10-24 20:32:23 +02001296 return 0;
1297 return -EALREADY;
1298 }
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001299 return REG_INTERSECT;
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001300 case NL80211_REGDOM_SET_BY_DRIVER:
1301 if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) {
Luis R. Rodrigueze74b1e72009-01-22 15:05:48 -08001302 if (is_old_static_regdom(cfg80211_regdomain))
1303 return 0;
Luis R. Rodriguez2f92cd22009-02-21 00:24:16 -05001304 if (regdom_changes(pending_request->alpha2))
Luis R. Rodrigueze74b1e72009-01-22 15:05:48 -08001305 return 0;
Johannes Berg84fa4f42008-10-24 20:32:23 +02001306 return -EALREADY;
Luis R. Rodrigueze74b1e72009-01-22 15:05:48 -08001307 }
Luis R. Rodriguezfff32c02009-02-21 00:04:32 -05001308
1309 /*
1310 * This would happen if you unplug and plug your card
1311 * back in or if you add a new device for which the previously
1312 * loaded card also agrees on the regulatory domain.
1313 */
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001314 if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
Luis R. Rodriguez2f92cd22009-02-21 00:24:16 -05001315 !regdom_changes(pending_request->alpha2))
Luis R. Rodriguezfff32c02009-02-21 00:04:32 -05001316 return -EALREADY;
1317
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001318 return REG_INTERSECT;
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001319 case NL80211_REGDOM_SET_BY_USER:
1320 if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001321 return REG_INTERSECT;
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001322 /*
1323 * If the user knows better the user should set the regdom
1324 * to their country before the IE is picked up
1325 */
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001326 if (last_request->initiator == NL80211_REGDOM_SET_BY_USER &&
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001327 last_request->intersect)
1328 return -EOPNOTSUPP;
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001329 /*
1330 * Process user requests only after previous user/driver/core
1331 * requests have been processed
1332 */
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001333 if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE ||
1334 last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
1335 last_request->initiator == NL80211_REGDOM_SET_BY_USER) {
Luis R. Rodriguez69b15722009-02-21 00:04:33 -05001336 if (regdom_changes(last_request->alpha2))
Luis R. Rodriguez5eebade2009-01-22 15:05:47 -08001337 return -EAGAIN;
1338 }
1339
Luis R. Rodrigueze74b1e72009-01-22 15:05:48 -08001340 if (!is_old_static_regdom(cfg80211_regdomain) &&
Luis R. Rodriguez2f92cd22009-02-21 00:24:16 -05001341 !regdom_changes(pending_request->alpha2))
Luis R. Rodrigueze74b1e72009-01-22 15:05:48 -08001342 return -EALREADY;
1343
Johannes Berg84fa4f42008-10-24 20:32:23 +02001344 return 0;
1345 }
1346
1347 return -EINVAL;
1348}
1349
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05001350/**
1351 * __regulatory_hint - hint to the wireless core a regulatory domain
1352 * @wiphy: if the hint comes from country information from an AP, this
1353 * is required to be set to the wiphy that received the information
Luis R. Rodriguez28da32d2009-02-21 00:24:14 -05001354 * @pending_request: the regulatory request currently being processed
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05001355 *
1356 * The Wireless subsystem can use this function to hint to the wireless core
Luis R. Rodriguez28da32d2009-02-21 00:24:14 -05001357 * what it believes should be the current regulatory domain.
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05001358 *
1359 * Returns zero if all went fine, %-EALREADY if a regulatory domain had
1360 * already been set or other standard error codes.
1361 *
1362 * Caller must hold &cfg80211_mutex
1363 */
Luis R. Rodriguez28da32d2009-02-21 00:24:14 -05001364static int __regulatory_hint(struct wiphy *wiphy,
1365 struct regulatory_request *pending_request)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001366{
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001367 bool intersect = false;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001368 int r = 0;
1369
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05001370 assert_cfg80211_lock();
1371
Luis R. Rodriguez2f92cd22009-02-21 00:24:16 -05001372 r = ignore_request(wiphy, pending_request);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001373
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001374 if (r == REG_INTERSECT) {
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001375 if (pending_request->initiator ==
1376 NL80211_REGDOM_SET_BY_DRIVER) {
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001377 r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain);
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05001378 if (r) {
1379 kfree(pending_request);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001380 return r;
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05001381 }
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001382 }
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001383 intersect = true;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001384 } else if (r) {
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001385 /*
1386 * If the regulatory domain being requested by the
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001387 * driver has already been set just copy it to the
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001388 * wiphy
1389 */
Luis R. Rodriguez28da32d2009-02-21 00:24:14 -05001390 if (r == -EALREADY &&
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001391 pending_request->initiator ==
1392 NL80211_REGDOM_SET_BY_DRIVER) {
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001393 r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain);
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05001394 if (r) {
1395 kfree(pending_request);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001396 return r;
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05001397 }
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001398 r = -EALREADY;
1399 goto new_request;
1400 }
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05001401 kfree(pending_request);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001402 return r;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001403 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001404
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001405new_request:
Luis R. Rodriguez5203cdb2008-11-12 14:21:56 -08001406 kfree(last_request);
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05001407
1408 last_request = pending_request;
1409 last_request->intersect = intersect;
1410
1411 pending_request = NULL;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001412
1413 /* When r == REG_INTERSECT we do need to call CRDA */
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -04001414 if (r < 0) {
1415 /*
1416 * Since CRDA will not be called in this case as we already
1417 * have applied the requested regulatory domain before we just
1418 * inform userspace we have processed the request
1419 */
1420 if (r == -EALREADY)
1421 nl80211_send_reg_change_event(last_request);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001422 return r;
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -04001423 }
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001424
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05001425 return call_crda(last_request->alpha2);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001426}
1427
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001428/* This currently only processes user and driver regulatory hints */
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05001429static void reg_process_hint(struct regulatory_request *reg_request)
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001430{
1431 int r = 0;
1432 struct wiphy *wiphy = NULL;
1433
1434 BUG_ON(!reg_request->alpha2);
1435
1436 mutex_lock(&cfg80211_mutex);
1437
1438 if (wiphy_idx_valid(reg_request->wiphy_idx))
1439 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
1440
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001441 if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001442 !wiphy) {
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05001443 kfree(reg_request);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001444 goto out;
1445 }
1446
Luis R. Rodriguez28da32d2009-02-21 00:24:14 -05001447 r = __regulatory_hint(wiphy, reg_request);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001448 /* This is required so that the orig_* parameters are saved */
1449 if (r == -EALREADY && wiphy && wiphy->strict_regulatory)
1450 wiphy_update_regulatory(wiphy, reg_request->initiator);
1451out:
1452 mutex_unlock(&cfg80211_mutex);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001453}
1454
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001455/* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001456static void reg_process_pending_hints(void)
1457 {
1458 struct regulatory_request *reg_request;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001459
1460 spin_lock(&reg_requests_lock);
1461 while (!list_empty(&reg_requests_list)) {
1462 reg_request = list_first_entry(&reg_requests_list,
1463 struct regulatory_request,
1464 list);
1465 list_del_init(&reg_request->list);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001466
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05001467 spin_unlock(&reg_requests_lock);
1468 reg_process_hint(reg_request);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001469 spin_lock(&reg_requests_lock);
1470 }
1471 spin_unlock(&reg_requests_lock);
1472}
1473
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001474/* Processes beacon hints -- this has nothing to do with country IEs */
1475static void reg_process_pending_beacon_hints(void)
1476{
1477 struct cfg80211_registered_device *drv;
1478 struct reg_beacon *pending_beacon, *tmp;
1479
1480 mutex_lock(&cfg80211_mutex);
1481
1482 /* This goes through the _pending_ beacon list */
1483 spin_lock_bh(&reg_pending_beacons_lock);
1484
1485 if (list_empty(&reg_pending_beacons)) {
1486 spin_unlock_bh(&reg_pending_beacons_lock);
1487 goto out;
1488 }
1489
1490 list_for_each_entry_safe(pending_beacon, tmp,
1491 &reg_pending_beacons, list) {
1492
1493 list_del_init(&pending_beacon->list);
1494
1495 /* Applies the beacon hint to current wiphys */
1496 list_for_each_entry(drv, &cfg80211_drv_list, list)
1497 wiphy_update_new_beacon(&drv->wiphy, pending_beacon);
1498
1499 /* Remembers the beacon hint for new wiphys or reg changes */
1500 list_add_tail(&pending_beacon->list, &reg_beacon_list);
1501 }
1502
1503 spin_unlock_bh(&reg_pending_beacons_lock);
1504out:
1505 mutex_unlock(&cfg80211_mutex);
1506}
1507
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001508static void reg_todo(struct work_struct *work)
1509{
1510 reg_process_pending_hints();
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001511 reg_process_pending_beacon_hints();
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001512}
1513
1514static DECLARE_WORK(reg_work, reg_todo);
1515
1516static void queue_regulatory_request(struct regulatory_request *request)
1517{
1518 spin_lock(&reg_requests_lock);
1519 list_add_tail(&request->list, &reg_requests_list);
1520 spin_unlock(&reg_requests_lock);
1521
1522 schedule_work(&reg_work);
1523}
1524
1525/* Core regulatory hint -- happens once during cfg80211_init() */
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05001526static int regulatory_hint_core(const char *alpha2)
1527{
1528 struct regulatory_request *request;
1529
1530 BUG_ON(last_request);
1531
1532 request = kzalloc(sizeof(struct regulatory_request),
1533 GFP_KERNEL);
1534 if (!request)
1535 return -ENOMEM;
1536
1537 request->alpha2[0] = alpha2[0];
1538 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001539 request->initiator = NL80211_REGDOM_SET_BY_CORE;
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05001540
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001541 queue_regulatory_request(request);
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05001542
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001543 return 0;
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05001544}
1545
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001546/* User hints */
1547int regulatory_hint_user(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001548{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001549 struct regulatory_request *request;
1550
Johannes Bergbe3d4812008-10-24 20:32:21 +02001551 BUG_ON(!alpha2);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001552
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001553 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
1554 if (!request)
1555 return -ENOMEM;
1556
1557 request->wiphy_idx = WIPHY_IDX_STALE;
1558 request->alpha2[0] = alpha2[0];
1559 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001560 request->initiator = NL80211_REGDOM_SET_BY_USER,
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001561
1562 queue_regulatory_request(request);
1563
1564 return 0;
1565}
1566
1567/* Driver hints */
1568int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
1569{
1570 struct regulatory_request *request;
1571
1572 BUG_ON(!alpha2);
1573 BUG_ON(!wiphy);
1574
1575 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
1576 if (!request)
1577 return -ENOMEM;
1578
1579 request->wiphy_idx = get_wiphy_idx(wiphy);
1580
1581 /* Must have registered wiphy first */
1582 BUG_ON(!wiphy_idx_valid(request->wiphy_idx));
1583
1584 request->alpha2[0] = alpha2[0];
1585 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001586 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001587
1588 queue_regulatory_request(request);
1589
1590 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001591}
1592EXPORT_SYMBOL(regulatory_hint);
1593
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001594static bool reg_same_country_ie_hint(struct wiphy *wiphy,
1595 u32 country_ie_checksum)
1596{
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001597 struct wiphy *request_wiphy;
1598
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05001599 assert_cfg80211_lock();
1600
Luis R. Rodriguezcc0b6fe2009-03-20 23:53:05 -04001601 if (unlikely(last_request->initiator !=
1602 NL80211_REGDOM_SET_BY_COUNTRY_IE))
1603 return false;
1604
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001605 request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
1606
1607 if (!request_wiphy)
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001608 return false;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001609
1610 if (likely(request_wiphy != wiphy))
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001611 return !country_ie_integrity_changes(country_ie_checksum);
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001612 /*
1613 * We should not have let these through at this point, they
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001614 * should have been picked up earlier by the first alpha2 check
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001615 * on the device
1616 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001617 if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum)))
1618 return true;
1619 return false;
1620}
1621
1622void regulatory_hint_11d(struct wiphy *wiphy,
1623 u8 *country_ie,
1624 u8 country_ie_len)
1625{
1626 struct ieee80211_regdomain *rd = NULL;
1627 char alpha2[2];
1628 u32 checksum = 0;
1629 enum environment_cap env = ENVIRON_ANY;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001630 struct regulatory_request *request;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001631
Luis R. Rodrigueza1794392009-02-21 00:04:21 -05001632 mutex_lock(&cfg80211_mutex);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001633
Luis R. Rodriguezd335fe62009-02-21 00:04:27 -05001634 if (unlikely(!last_request)) {
1635 mutex_unlock(&cfg80211_mutex);
1636 return;
1637 }
1638
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001639 /* IE len must be evenly divisible by 2 */
1640 if (country_ie_len & 0x01)
1641 goto out;
1642
1643 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1644 goto out;
1645
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001646 /*
1647 * Pending country IE processing, this can happen after we
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001648 * call CRDA and wait for a response if a beacon was received before
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001649 * we were able to process the last regulatory_hint_11d() call
1650 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001651 if (country_ie_regdomain)
1652 goto out;
1653
1654 alpha2[0] = country_ie[0];
1655 alpha2[1] = country_ie[1];
1656
1657 if (country_ie[2] == 'I')
1658 env = ENVIRON_INDOOR;
1659 else if (country_ie[2] == 'O')
1660 env = ENVIRON_OUTDOOR;
1661
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001662 /*
1663 * We will run this for *every* beacon processed for the BSSID, so
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001664 * we optimize an early check to exit out early if we don't have to
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001665 * do anything
1666 */
Luis R. Rodriguezcc0b6fe2009-03-20 23:53:05 -04001667 if (likely(last_request->initiator ==
1668 NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1669 wiphy_idx_valid(last_request->wiphy_idx))) {
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001670 struct cfg80211_registered_device *drv_last_ie;
1671
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001672 drv_last_ie =
1673 cfg80211_drv_by_wiphy_idx(last_request->wiphy_idx);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001674
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001675 /*
1676 * Lets keep this simple -- we trust the first AP
1677 * after we intersect with CRDA
1678 */
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001679 if (likely(&drv_last_ie->wiphy == wiphy)) {
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001680 /*
1681 * Ignore IEs coming in on this wiphy with
1682 * the same alpha2 and environment cap
1683 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001684 if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2,
1685 alpha2) &&
1686 env == drv_last_ie->env)) {
1687 goto out;
1688 }
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001689 /*
1690 * the wiphy moved on to another BSSID or the AP
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001691 * was reconfigured. XXX: We need to deal with the
1692 * case where the user suspends and goes to goes
1693 * to another country, and then gets IEs from an
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001694 * AP with different settings
1695 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001696 goto out;
1697 } else {
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001698 /*
1699 * Ignore IEs coming in on two separate wiphys with
1700 * the same alpha2 and environment cap
1701 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001702 if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2,
1703 alpha2) &&
1704 env == drv_last_ie->env)) {
1705 goto out;
1706 }
1707 /* We could potentially intersect though */
1708 goto out;
1709 }
1710 }
1711
1712 rd = country_ie_2_rd(country_ie, country_ie_len, &checksum);
1713 if (!rd)
1714 goto out;
1715
Luis R. Rodriguez915278e2009-02-21 00:04:28 -05001716 /*
1717 * This will not happen right now but we leave it here for the
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001718 * the future when we want to add suspend/resume support and having
1719 * the user move to another country after doing so, or having the user
Luis R. Rodriguez915278e2009-02-21 00:04:28 -05001720 * move to another AP. Right now we just trust the first AP.
1721 *
1722 * If we hit this before we add this support we want to be informed of
1723 * it as it would indicate a mistake in the current design
1724 */
1725 if (WARN_ON(reg_same_country_ie_hint(wiphy, checksum)))
Luis R. Rodriguez0441d6f2009-02-21 00:04:29 -05001726 goto free_rd_out;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001727
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001728 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
1729 if (!request)
1730 goto free_rd_out;
1731
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001732 /*
1733 * We keep this around for when CRDA comes back with a response so
1734 * we can intersect with that
1735 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001736 country_ie_regdomain = rd;
1737
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001738 request->wiphy_idx = get_wiphy_idx(wiphy);
1739 request->alpha2[0] = rd->alpha2[0];
1740 request->alpha2[1] = rd->alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001741 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001742 request->country_ie_checksum = checksum;
1743 request->country_ie_env = env;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001744
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001745 mutex_unlock(&cfg80211_mutex);
1746
1747 queue_regulatory_request(request);
1748
1749 return;
Luis R. Rodriguez0441d6f2009-02-21 00:04:29 -05001750
1751free_rd_out:
1752 kfree(rd);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001753out:
Luis R. Rodrigueza1794392009-02-21 00:04:21 -05001754 mutex_unlock(&cfg80211_mutex);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001755}
1756EXPORT_SYMBOL(regulatory_hint_11d);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001757
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001758static bool freq_is_chan_12_13_14(u16 freq)
1759{
1760 if (freq == ieee80211_channel_to_frequency(12) ||
1761 freq == ieee80211_channel_to_frequency(13) ||
1762 freq == ieee80211_channel_to_frequency(14))
1763 return true;
1764 return false;
1765}
1766
1767int regulatory_hint_found_beacon(struct wiphy *wiphy,
1768 struct ieee80211_channel *beacon_chan,
1769 gfp_t gfp)
1770{
1771 struct reg_beacon *reg_beacon;
1772
1773 if (likely((beacon_chan->beacon_found ||
1774 (beacon_chan->flags & IEEE80211_CHAN_RADAR) ||
1775 (beacon_chan->band == IEEE80211_BAND_2GHZ &&
1776 !freq_is_chan_12_13_14(beacon_chan->center_freq)))))
1777 return 0;
1778
1779 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
1780 if (!reg_beacon)
1781 return -ENOMEM;
1782
1783#ifdef CONFIG_CFG80211_REG_DEBUG
1784 printk(KERN_DEBUG "cfg80211: Found new beacon on "
1785 "frequency: %d MHz (Ch %d) on %s\n",
1786 beacon_chan->center_freq,
1787 ieee80211_frequency_to_channel(beacon_chan->center_freq),
1788 wiphy_name(wiphy));
1789#endif
1790 memcpy(&reg_beacon->chan, beacon_chan,
1791 sizeof(struct ieee80211_channel));
1792
1793
1794 /*
1795 * Since we can be called from BH or and non-BH context
1796 * we must use spin_lock_bh()
1797 */
1798 spin_lock_bh(&reg_pending_beacons_lock);
1799 list_add_tail(&reg_beacon->list, &reg_pending_beacons);
1800 spin_unlock_bh(&reg_pending_beacons_lock);
1801
1802 schedule_work(&reg_work);
1803
1804 return 0;
1805}
1806
Johannes Berga3d2eaf2008-09-15 11:10:52 +02001807static void print_rd_rules(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001808{
1809 unsigned int i;
Johannes Berga3d2eaf2008-09-15 11:10:52 +02001810 const struct ieee80211_reg_rule *reg_rule = NULL;
1811 const struct ieee80211_freq_range *freq_range = NULL;
1812 const struct ieee80211_power_rule *power_rule = NULL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001813
1814 printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), "
1815 "(max_antenna_gain, max_eirp)\n");
1816
1817 for (i = 0; i < rd->n_reg_rules; i++) {
1818 reg_rule = &rd->reg_rules[i];
1819 freq_range = &reg_rule->freq_range;
1820 power_rule = &reg_rule->power_rule;
1821
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001822 /*
1823 * There may not be documentation for max antenna gain
1824 * in certain regions
1825 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001826 if (power_rule->max_antenna_gain)
1827 printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), "
1828 "(%d mBi, %d mBm)\n",
1829 freq_range->start_freq_khz,
1830 freq_range->end_freq_khz,
1831 freq_range->max_bandwidth_khz,
1832 power_rule->max_antenna_gain,
1833 power_rule->max_eirp);
1834 else
1835 printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), "
1836 "(N/A, %d mBm)\n",
1837 freq_range->start_freq_khz,
1838 freq_range->end_freq_khz,
1839 freq_range->max_bandwidth_khz,
1840 power_rule->max_eirp);
1841 }
1842}
1843
Johannes Berga3d2eaf2008-09-15 11:10:52 +02001844static void print_regdomain(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001845{
1846
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001847 if (is_intersected_alpha2(rd->alpha2)) {
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001848
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001849 if (last_request->initiator ==
1850 NL80211_REGDOM_SET_BY_COUNTRY_IE) {
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001851 struct cfg80211_registered_device *drv;
1852 drv = cfg80211_drv_by_wiphy_idx(
1853 last_request->wiphy_idx);
1854 if (drv) {
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001855 printk(KERN_INFO "cfg80211: Current regulatory "
1856 "domain updated by AP to: %c%c\n",
1857 drv->country_ie_alpha2[0],
1858 drv->country_ie_alpha2[1]);
1859 } else
1860 printk(KERN_INFO "cfg80211: Current regulatory "
1861 "domain intersected: \n");
1862 } else
1863 printk(KERN_INFO "cfg80211: Current regulatory "
Luis R. Rodriguez039498c2009-01-07 17:43:35 -08001864 "domain intersected: \n");
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001865 } else if (is_world_regdom(rd->alpha2))
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001866 printk(KERN_INFO "cfg80211: World regulatory "
1867 "domain updated:\n");
1868 else {
1869 if (is_unknown_alpha2(rd->alpha2))
1870 printk(KERN_INFO "cfg80211: Regulatory domain "
1871 "changed to driver built-in settings "
1872 "(unknown country)\n");
1873 else
1874 printk(KERN_INFO "cfg80211: Regulatory domain "
1875 "changed to country: %c%c\n",
1876 rd->alpha2[0], rd->alpha2[1]);
1877 }
1878 print_rd_rules(rd);
1879}
1880
Johannes Berg2df78162008-10-28 16:49:41 +01001881static void print_regdomain_info(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001882{
1883 printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n",
1884 rd->alpha2[0], rd->alpha2[1]);
1885 print_rd_rules(rd);
1886}
1887
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001888#ifdef CONFIG_CFG80211_REG_DEBUG
1889static 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 printk(KERN_DEBUG "cfg80211: Received country IE:\n");
1895 print_regdomain_info(country_ie_regdomain);
1896 printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n");
1897 print_regdomain_info(rd);
1898 if (intersected_rd) {
1899 printk(KERN_DEBUG "cfg80211: We intersect both of these "
1900 "and get:\n");
Luis R. Rodriguez667ecd02009-01-22 15:05:43 -08001901 print_regdomain_info(intersected_rd);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001902 return;
1903 }
1904 printk(KERN_DEBUG "cfg80211: Intersection between both failed\n");
1905}
1906#else
1907static inline void reg_country_ie_process_debug(
1908 const struct ieee80211_regdomain *rd,
1909 const struct ieee80211_regdomain *country_ie_regdomain,
1910 const struct ieee80211_regdomain *intersected_rd)
1911{
1912}
1913#endif
1914
Johannes Bergd2372b32008-10-24 20:32:20 +02001915/* Takes ownership of rd only if it doesn't fail */
Johannes Berga3d2eaf2008-09-15 11:10:52 +02001916static int __set_regdom(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001917{
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001918 const struct ieee80211_regdomain *intersected_rd = NULL;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001919 struct cfg80211_registered_device *drv = NULL;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001920 struct wiphy *request_wiphy;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001921 /* Some basic sanity checks first */
1922
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001923 if (is_world_regdom(rd->alpha2)) {
Johannes Bergf6037d02008-10-21 11:01:33 +02001924 if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001925 return -EINVAL;
1926 update_world_regdomain(rd);
1927 return 0;
1928 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001929
1930 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
1931 !is_unknown_alpha2(rd->alpha2))
1932 return -EINVAL;
1933
Johannes Bergf6037d02008-10-21 11:01:33 +02001934 if (!last_request)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001935 return -EINVAL;
1936
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001937 /*
1938 * Lets only bother proceeding on the same alpha2 if the current
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001939 * rd is non static (it means CRDA was present and was used last)
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001940 * and the pending request came in from a country IE
1941 */
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001942 if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001943 /*
1944 * If someone else asked us to change the rd lets only bother
1945 * checking if the alpha2 changes if CRDA was already called
1946 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001947 if (!is_old_static_regdom(cfg80211_regdomain) &&
Luis R. Rodriguez69b15722009-02-21 00:04:33 -05001948 !regdom_changes(rd->alpha2))
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001949 return -EINVAL;
1950 }
1951
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001952 /*
1953 * Now lets set the regulatory domain, update all driver channels
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001954 * and finally inform them of what we have done, in case they want
1955 * to review or adjust their own settings based on their own
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001956 * internal EEPROM data
1957 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001958
Johannes Bergf6037d02008-10-21 11:01:33 +02001959 if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001960 return -EINVAL;
1961
Luis R. Rodriguez8375af32008-11-12 14:21:57 -08001962 if (!is_valid_rd(rd)) {
1963 printk(KERN_ERR "cfg80211: Invalid "
1964 "regulatory domain detected:\n");
1965 print_regdomain_info(rd);
1966 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001967 }
1968
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001969 request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
1970
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08001971 if (!last_request->intersect) {
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001972 int r;
1973
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001974 if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) {
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001975 reset_regdomains();
1976 cfg80211_regdomain = rd;
1977 return 0;
1978 }
1979
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001980 /*
1981 * For a driver hint, lets copy the regulatory domain the
1982 * driver wanted to the wiphy to deal with conflicts
1983 */
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001984
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001985 BUG_ON(request_wiphy->regd);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001986
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001987 r = reg_copy_regd(&request_wiphy->regd, rd);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001988 if (r)
1989 return r;
1990
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08001991 reset_regdomains();
1992 cfg80211_regdomain = rd;
1993 return 0;
1994 }
1995
1996 /* Intersection requires a bit more work */
1997
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001998 if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08001999
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07002000 intersected_rd = regdom_intersect(rd, cfg80211_regdomain);
2001 if (!intersected_rd)
2002 return -EINVAL;
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002003
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002004 /*
2005 * We can trash what CRDA provided now.
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002006 * However if a driver requested this specific regulatory
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002007 * domain we keep it for its private use
2008 */
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002009 if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER)
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002010 request_wiphy->regd = rd;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002011 else
2012 kfree(rd);
2013
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002014 rd = NULL;
2015
2016 reset_regdomains();
2017 cfg80211_regdomain = intersected_rd;
2018
2019 return 0;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07002020 }
2021
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002022 /*
2023 * Country IE requests are handled a bit differently, we intersect
2024 * the country IE rd with what CRDA believes that country should have
2025 */
2026
2027 BUG_ON(!country_ie_regdomain);
Luis R. Rodriguez86f04682009-03-20 23:53:07 -04002028 BUG_ON(rd == country_ie_regdomain);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002029
Luis R. Rodriguez86f04682009-03-20 23:53:07 -04002030 /*
2031 * Intersect what CRDA returned and our what we
2032 * had built from the Country IE received
2033 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002034
Luis R. Rodriguez86f04682009-03-20 23:53:07 -04002035 intersected_rd = regdom_intersect(rd, country_ie_regdomain);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002036
Luis R. Rodriguez86f04682009-03-20 23:53:07 -04002037 reg_country_ie_process_debug(rd,
2038 country_ie_regdomain,
2039 intersected_rd);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002040
Luis R. Rodriguez86f04682009-03-20 23:53:07 -04002041 kfree(country_ie_regdomain);
2042 country_ie_regdomain = NULL;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002043
2044 if (!intersected_rd)
2045 return -EINVAL;
2046
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002047 drv = wiphy_to_dev(request_wiphy);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002048
2049 drv->country_ie_alpha2[0] = rd->alpha2[0];
2050 drv->country_ie_alpha2[1] = rd->alpha2[1];
2051 drv->env = last_request->country_ie_env;
2052
2053 BUG_ON(intersected_rd == rd);
2054
2055 kfree(rd);
2056 rd = NULL;
2057
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002058 reset_regdomains();
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002059 cfg80211_regdomain = intersected_rd;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002060
2061 return 0;
2062}
2063
2064
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002065/*
2066 * Use this call to set the current regulatory domain. Conflicts with
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002067 * multiple drivers can be ironed out later. Caller must've already
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002068 * kmalloc'd the rd structure. Caller must hold cfg80211_mutex
2069 */
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002070int set_regdom(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002071{
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002072 int r;
2073
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05002074 assert_cfg80211_lock();
2075
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002076 /* Note that this doesn't update the wiphys, this is done below */
2077 r = __set_regdom(rd);
Johannes Bergd2372b32008-10-24 20:32:20 +02002078 if (r) {
2079 kfree(rd);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002080 return r;
Johannes Bergd2372b32008-10-24 20:32:20 +02002081 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002082
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002083 /* This would make this whole thing pointless */
Luis R. Rodrigueza01ddaf2008-11-12 14:21:59 -08002084 if (!last_request->intersect)
2085 BUG_ON(rd != cfg80211_regdomain);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002086
2087 /* update all wiphys now with the new established regulatory domain */
Johannes Bergf6037d02008-10-21 11:01:33 +02002088 update_all_wiphy_regulatory(last_request->initiator);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002089
Luis R. Rodrigueza01ddaf2008-11-12 14:21:59 -08002090 print_regdomain(cfg80211_regdomain);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002091
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -04002092 nl80211_send_reg_change_event(last_request);
2093
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002094 return r;
2095}
2096
Luis R. Rodrigueza1794392009-02-21 00:04:21 -05002097/* Caller must hold cfg80211_mutex */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002098void reg_device_remove(struct wiphy *wiphy)
2099{
Luis R. Rodriguez0ad8aca2009-03-24 21:21:08 -04002100 struct wiphy *request_wiphy = NULL;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002101
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05002102 assert_cfg80211_lock();
2103
Luis R. Rodriguez0ad8aca2009-03-24 21:21:08 -04002104 if (last_request)
2105 request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002106
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002107 kfree(wiphy->regd);
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002108 if (!last_request || !request_wiphy)
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002109 return;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002110 if (request_wiphy != wiphy)
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002111 return;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002112 last_request->wiphy_idx = WIPHY_IDX_STALE;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002113 last_request->country_ie_env = ENVIRON_ANY;
2114}
2115
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002116int regulatory_init(void)
2117{
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05002118 int err = 0;
Johannes Berg734366d2008-09-15 10:56:48 +02002119
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002120 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
2121 if (IS_ERR(reg_pdev))
2122 return PTR_ERR(reg_pdev);
Johannes Berg734366d2008-09-15 10:56:48 +02002123
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002124 spin_lock_init(&reg_requests_lock);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002125 spin_lock_init(&reg_pending_beacons_lock);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002126
Johannes Berg734366d2008-09-15 10:56:48 +02002127#ifdef CONFIG_WIRELESS_OLD_REGULATORY
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002128 cfg80211_regdomain = static_regdom(ieee80211_regdom);
Johannes Berg734366d2008-09-15 10:56:48 +02002129
Johannes Berg942b25c2008-09-15 11:26:47 +02002130 printk(KERN_INFO "cfg80211: Using static regulatory domain info\n");
Johannes Berg734366d2008-09-15 10:56:48 +02002131 print_regdomain_info(cfg80211_regdomain);
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002132 /*
2133 * The old code still requests for a new regdomain and if
Johannes Berg734366d2008-09-15 10:56:48 +02002134 * you have CRDA you get it updated, otherwise you get
Luis R. Rodriguez2e097dc2009-03-20 23:53:04 -04002135 * stuck with the static values. Since "EU" is not a valid
2136 * ISO / IEC 3166 alpha2 code we can't expect userpace to
2137 * give us a regulatory domain for it. We need last_request
2138 * iniitalized though so lets just send a request which we
2139 * know will be ignored... this crap will be removed once
2140 * OLD_REG dies.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002141 */
Luis R. Rodriguez2e097dc2009-03-20 23:53:04 -04002142 err = regulatory_hint_core(ieee80211_regdom);
Johannes Berg734366d2008-09-15 10:56:48 +02002143#else
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002144 cfg80211_regdomain = cfg80211_world_regdom;
Johannes Berg734366d2008-09-15 10:56:48 +02002145
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -04002146 err = regulatory_hint_core(ieee80211_regdom);
Johannes Berg734366d2008-09-15 10:56:48 +02002147#endif
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05002148 if (err) {
2149 if (err == -ENOMEM)
2150 return err;
2151 /*
2152 * N.B. kobject_uevent_env() can fail mainly for when we're out
2153 * memory which is handled and propagated appropriately above
2154 * but it can also fail during a netlink_broadcast() or during
2155 * early boot for call_usermodehelper(). For now treat these
2156 * errors as non-fatal.
2157 */
2158 printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable "
2159 "to call CRDA during init");
2160#ifdef CONFIG_CFG80211_REG_DEBUG
2161 /* We want to find out exactly why when debugging */
2162 WARN_ON(err);
2163#endif
2164 }
Johannes Berg734366d2008-09-15 10:56:48 +02002165
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002166 return 0;
2167}
2168
2169void regulatory_exit(void)
2170{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002171 struct regulatory_request *reg_request, *tmp;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002172 struct reg_beacon *reg_beacon, *btmp;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002173
2174 cancel_work_sync(&reg_work);
2175
Luis R. Rodrigueza1794392009-02-21 00:04:21 -05002176 mutex_lock(&cfg80211_mutex);
Johannes Berg734366d2008-09-15 10:56:48 +02002177
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002178 reset_regdomains();
Johannes Berg734366d2008-09-15 10:56:48 +02002179
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002180 kfree(country_ie_regdomain);
2181 country_ie_regdomain = NULL;
2182
Johannes Bergf6037d02008-10-21 11:01:33 +02002183 kfree(last_request);
2184
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002185 platform_device_unregister(reg_pdev);
Johannes Berg734366d2008-09-15 10:56:48 +02002186
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002187 spin_lock_bh(&reg_pending_beacons_lock);
2188 if (!list_empty(&reg_pending_beacons)) {
2189 list_for_each_entry_safe(reg_beacon, btmp,
2190 &reg_pending_beacons, list) {
2191 list_del(&reg_beacon->list);
2192 kfree(reg_beacon);
2193 }
2194 }
2195 spin_unlock_bh(&reg_pending_beacons_lock);
2196
2197 if (!list_empty(&reg_beacon_list)) {
2198 list_for_each_entry_safe(reg_beacon, btmp,
2199 &reg_beacon_list, list) {
2200 list_del(&reg_beacon->list);
2201 kfree(reg_beacon);
2202 }
2203 }
2204
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002205 spin_lock(&reg_requests_lock);
2206 if (!list_empty(&reg_requests_list)) {
2207 list_for_each_entry_safe(reg_request, tmp,
2208 &reg_requests_list, list) {
2209 list_del(&reg_request->list);
2210 kfree(reg_request);
2211 }
2212 }
2213 spin_unlock(&reg_requests_lock);
2214
Luis R. Rodrigueza1794392009-02-21 00:04:21 -05002215 mutex_unlock(&cfg80211_mutex);
Johannes Berg8318d782008-01-24 19:38:38 +01002216}