Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2002-2005, Instant802 Networks, Inc. |
| 3 | * Copyright 2005-2006, Devicescape Software, Inc. |
| 4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 5 | * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com> |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 12 | /** |
| 13 | * DOC: Wireless regulatory infrastructure |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 14 | * |
| 15 | * The usual implementation is for a driver to read a device EEPROM to |
| 16 | * determine which regulatory domain it should be operating under, then |
| 17 | * looking up the allowable channels in a driver-local table and finally |
| 18 | * registering those channels in the wiphy structure. |
| 19 | * |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 20 | * Another set of compliance enforcement is for drivers to use their |
| 21 | * own compliance limits which can be stored on the EEPROM. The host |
| 22 | * driver or firmware may ensure these are used. |
| 23 | * |
| 24 | * In addition to all this we provide an extra layer of regulatory |
| 25 | * conformance. For drivers which do not have any regulatory |
| 26 | * information CRDA provides the complete regulatory solution. |
| 27 | * For others it provides a community effort on further restrictions |
| 28 | * to enhance compliance. |
| 29 | * |
| 30 | * Note: When number of rules --> infinity we will not be able to |
| 31 | * index on alpha2 any more, instead we'll probably have to |
| 32 | * rely on some SHA1 checksum of the regdomain for example. |
| 33 | * |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 34 | */ |
| 35 | #include <linux/kernel.h> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 36 | #include <linux/list.h> |
| 37 | #include <linux/random.h> |
| 38 | #include <linux/nl80211.h> |
| 39 | #include <linux/platform_device.h> |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 40 | #include <net/wireless.h> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 41 | #include <net/cfg80211.h> |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 42 | #include "core.h" |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 43 | #include "reg.h" |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 44 | |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 45 | /* wiphy is set if this request's initiator is REGDOM_SET_BY_DRIVER */ |
| 46 | struct regulatory_request { |
| 47 | struct list_head list; |
| 48 | struct wiphy *wiphy; |
| 49 | int granted; |
| 50 | enum reg_set_by initiator; |
| 51 | char alpha2[2]; |
| 52 | }; |
| 53 | |
| 54 | static LIST_HEAD(regulatory_requests); |
| 55 | DEFINE_MUTEX(cfg80211_reg_mutex); |
| 56 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 57 | /* To trigger userspace events */ |
| 58 | static struct platform_device *reg_pdev; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 59 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 60 | /* Keep the ordering from large to small */ |
| 61 | static u32 supported_bandwidths[] = { |
| 62 | MHZ_TO_KHZ(40), |
| 63 | MHZ_TO_KHZ(20), |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 64 | }; |
| 65 | |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 66 | static struct list_head regulatory_requests; |
| 67 | |
| 68 | /* Central wireless core regulatory domains, we only need two, |
| 69 | * the current one and a world regulatory domain in case we have no |
| 70 | * information to give us an alpha2 */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 71 | static const struct ieee80211_regdomain *cfg80211_regdomain; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 72 | |
| 73 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
| 74 | static const struct ieee80211_regdomain world_regdom = { |
| 75 | .n_reg_rules = 1, |
| 76 | .alpha2 = "00", |
| 77 | .reg_rules = { |
| 78 | REG_RULE(2412-10, 2462+10, 40, 6, 20, |
| 79 | NL80211_RRF_PASSIVE_SCAN | |
| 80 | NL80211_RRF_NO_IBSS), |
| 81 | } |
| 82 | }; |
| 83 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 84 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
| 85 | &world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 86 | |
| 87 | #ifdef CONFIG_WIRELESS_OLD_REGULATORY |
| 88 | static char *ieee80211_regdom = "US"; |
| 89 | module_param(ieee80211_regdom, charp, 0444); |
| 90 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); |
| 91 | |
| 92 | /* We assume 40 MHz bandwidth for the old regulatory work. |
| 93 | * We make emphasis we are using the exact same frequencies |
| 94 | * as before */ |
| 95 | |
| 96 | static const struct ieee80211_regdomain us_regdom = { |
| 97 | .n_reg_rules = 6, |
| 98 | .alpha2 = "US", |
| 99 | .reg_rules = { |
| 100 | /* IEEE 802.11b/g, channels 1..11 */ |
| 101 | REG_RULE(2412-10, 2462+10, 40, 6, 27, 0), |
| 102 | /* IEEE 802.11a, channel 36 */ |
| 103 | REG_RULE(5180-10, 5180+10, 40, 6, 23, 0), |
| 104 | /* IEEE 802.11a, channel 40 */ |
| 105 | REG_RULE(5200-10, 5200+10, 40, 6, 23, 0), |
| 106 | /* IEEE 802.11a, channel 44 */ |
| 107 | REG_RULE(5220-10, 5220+10, 40, 6, 23, 0), |
| 108 | /* IEEE 802.11a, channels 48..64 */ |
| 109 | REG_RULE(5240-10, 5320+10, 40, 6, 23, 0), |
| 110 | /* IEEE 802.11a, channels 149..165, outdoor */ |
| 111 | REG_RULE(5745-10, 5825+10, 40, 6, 30, 0), |
| 112 | } |
| 113 | }; |
| 114 | |
| 115 | static const struct ieee80211_regdomain jp_regdom = { |
| 116 | .n_reg_rules = 3, |
| 117 | .alpha2 = "JP", |
| 118 | .reg_rules = { |
| 119 | /* IEEE 802.11b/g, channels 1..14 */ |
| 120 | REG_RULE(2412-10, 2484+10, 40, 6, 20, 0), |
| 121 | /* IEEE 802.11a, channels 34..48 */ |
| 122 | REG_RULE(5170-10, 5240+10, 40, 6, 20, |
| 123 | NL80211_RRF_PASSIVE_SCAN), |
| 124 | /* IEEE 802.11a, channels 52..64 */ |
| 125 | REG_RULE(5260-10, 5320+10, 40, 6, 20, |
| 126 | NL80211_RRF_NO_IBSS | |
| 127 | NL80211_RRF_DFS), |
| 128 | } |
| 129 | }; |
| 130 | |
| 131 | static const struct ieee80211_regdomain eu_regdom = { |
| 132 | .n_reg_rules = 6, |
| 133 | /* This alpha2 is bogus, we leave it here just for stupid |
| 134 | * backward compatibility */ |
| 135 | .alpha2 = "EU", |
| 136 | .reg_rules = { |
| 137 | /* IEEE 802.11b/g, channels 1..13 */ |
| 138 | REG_RULE(2412-10, 2472+10, 40, 6, 20, 0), |
| 139 | /* IEEE 802.11a, channel 36 */ |
| 140 | REG_RULE(5180-10, 5180+10, 40, 6, 23, |
| 141 | NL80211_RRF_PASSIVE_SCAN), |
| 142 | /* IEEE 802.11a, channel 40 */ |
| 143 | REG_RULE(5200-10, 5200+10, 40, 6, 23, |
| 144 | NL80211_RRF_PASSIVE_SCAN), |
| 145 | /* IEEE 802.11a, channel 44 */ |
| 146 | REG_RULE(5220-10, 5220+10, 40, 6, 23, |
| 147 | NL80211_RRF_PASSIVE_SCAN), |
| 148 | /* IEEE 802.11a, channels 48..64 */ |
| 149 | REG_RULE(5240-10, 5320+10, 40, 6, 20, |
| 150 | NL80211_RRF_NO_IBSS | |
| 151 | NL80211_RRF_DFS), |
| 152 | /* IEEE 802.11a, channels 100..140 */ |
| 153 | REG_RULE(5500-10, 5700+10, 40, 6, 30, |
| 154 | NL80211_RRF_NO_IBSS | |
| 155 | NL80211_RRF_DFS), |
| 156 | } |
| 157 | }; |
| 158 | |
| 159 | static const struct ieee80211_regdomain *static_regdom(char *alpha2) |
| 160 | { |
| 161 | if (alpha2[0] == 'U' && alpha2[1] == 'S') |
| 162 | return &us_regdom; |
| 163 | if (alpha2[0] == 'J' && alpha2[1] == 'P') |
| 164 | return &jp_regdom; |
| 165 | if (alpha2[0] == 'E' && alpha2[1] == 'U') |
| 166 | return &eu_regdom; |
| 167 | /* Default, as per the old rules */ |
| 168 | return &us_regdom; |
| 169 | } |
| 170 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 171 | static bool is_old_static_regdom(const struct ieee80211_regdomain *rd) |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 172 | { |
| 173 | if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom) |
| 174 | return true; |
| 175 | return false; |
| 176 | } |
| 177 | |
| 178 | /* The old crap never deals with a world regulatory domain, it only |
| 179 | * deals with the static regulatory domain passed and if possible |
| 180 | * an updated "US" or "JP" regulatory domain. We do however store the |
| 181 | * old static regulatory domain in cfg80211_world_regdom for convenience |
| 182 | * of use here */ |
| 183 | static void reset_regdomains_static(void) |
| 184 | { |
| 185 | if (!is_old_static_regdom(cfg80211_regdomain)) |
| 186 | kfree(cfg80211_regdomain); |
| 187 | /* This is setting the regdom to the old static regdom */ |
| 188 | cfg80211_regdomain = |
| 189 | (struct ieee80211_regdomain *) cfg80211_world_regdom; |
| 190 | } |
| 191 | #else |
| 192 | static void reset_regdomains(void) |
| 193 | { |
| 194 | if (cfg80211_world_regdom && cfg80211_world_regdom != &world_regdom) { |
| 195 | if (cfg80211_world_regdom == cfg80211_regdomain) { |
| 196 | kfree(cfg80211_regdomain); |
| 197 | } else { |
| 198 | kfree(cfg80211_world_regdom); |
| 199 | kfree(cfg80211_regdomain); |
| 200 | } |
| 201 | } else if (cfg80211_regdomain && cfg80211_regdomain != &world_regdom) |
| 202 | kfree(cfg80211_regdomain); |
| 203 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 204 | cfg80211_world_regdom = &world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 205 | cfg80211_regdomain = NULL; |
| 206 | } |
| 207 | |
| 208 | /* Dynamic world regulatory domain requested by the wireless |
| 209 | * core upon initialization */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 210 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 211 | { |
| 212 | BUG_ON(list_empty(®ulatory_requests)); |
| 213 | |
| 214 | reset_regdomains(); |
| 215 | |
| 216 | cfg80211_world_regdom = rd; |
| 217 | cfg80211_regdomain = rd; |
| 218 | } |
| 219 | #endif |
| 220 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 221 | bool is_world_regdom(const char *alpha2) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 222 | { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 223 | if (!alpha2) |
| 224 | return false; |
| 225 | if (alpha2[0] == '0' && alpha2[1] == '0') |
| 226 | return true; |
| 227 | return false; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 228 | } |
| 229 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 230 | static bool is_alpha2_set(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 231 | { |
| 232 | if (!alpha2) |
| 233 | return false; |
| 234 | if (alpha2[0] != 0 && alpha2[1] != 0) |
| 235 | return true; |
| 236 | return false; |
| 237 | } |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 238 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 239 | static bool is_alpha_upper(char letter) |
| 240 | { |
| 241 | /* ASCII A - Z */ |
| 242 | if (letter >= 65 && letter <= 90) |
| 243 | return true; |
| 244 | return false; |
| 245 | } |
| 246 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 247 | static bool is_unknown_alpha2(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 248 | { |
| 249 | if (!alpha2) |
| 250 | return false; |
| 251 | /* Special case where regulatory domain was built by driver |
| 252 | * but a specific alpha2 cannot be determined */ |
| 253 | if (alpha2[0] == '9' && alpha2[1] == '9') |
| 254 | return true; |
| 255 | return false; |
| 256 | } |
| 257 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 258 | static bool is_an_alpha2(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 259 | { |
| 260 | if (!alpha2) |
| 261 | return false; |
| 262 | if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) |
| 263 | return true; |
| 264 | return false; |
| 265 | } |
| 266 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 267 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 268 | { |
| 269 | if (!alpha2_x || !alpha2_y) |
| 270 | return false; |
| 271 | if (alpha2_x[0] == alpha2_y[0] && |
| 272 | alpha2_x[1] == alpha2_y[1]) |
| 273 | return true; |
| 274 | return false; |
| 275 | } |
| 276 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 277 | static bool regdom_changed(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 278 | { |
| 279 | if (!cfg80211_regdomain) |
| 280 | return true; |
| 281 | if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) |
| 282 | return false; |
| 283 | return true; |
| 284 | } |
| 285 | |
| 286 | /* This lets us keep regulatory code which is updated on a regulatory |
| 287 | * basis in userspace. */ |
| 288 | static int call_crda(const char *alpha2) |
| 289 | { |
| 290 | char country_env[9 + 2] = "COUNTRY="; |
| 291 | char *envp[] = { |
| 292 | country_env, |
| 293 | NULL |
| 294 | }; |
| 295 | |
| 296 | if (!is_world_regdom((char *) alpha2)) |
| 297 | printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", |
| 298 | alpha2[0], alpha2[1]); |
| 299 | else |
| 300 | #ifdef CONFIG_WIRELESS_OLD_REGULATORY |
| 301 | return -EINVAL; |
| 302 | #else |
| 303 | printk(KERN_INFO "cfg80211: Calling CRDA to update world " |
| 304 | "regulatory domain\n"); |
| 305 | #endif |
| 306 | |
| 307 | country_env[8] = alpha2[0]; |
| 308 | country_env[9] = alpha2[1]; |
| 309 | |
| 310 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); |
| 311 | } |
| 312 | |
| 313 | /* This has the logic which determines when a new request |
| 314 | * should be ignored. */ |
| 315 | static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by, |
| 316 | char *alpha2, struct ieee80211_regdomain *rd) |
| 317 | { |
| 318 | struct regulatory_request *last_request = NULL; |
| 319 | |
| 320 | /* All initial requests are respected */ |
| 321 | if (list_empty(®ulatory_requests)) |
| 322 | return 0; |
| 323 | |
| 324 | last_request = list_first_entry(®ulatory_requests, |
| 325 | struct regulatory_request, list); |
| 326 | |
| 327 | switch (set_by) { |
| 328 | case REGDOM_SET_BY_INIT: |
| 329 | return -EINVAL; |
| 330 | case REGDOM_SET_BY_CORE: |
| 331 | /* Always respect new wireless core hints, should only |
| 332 | * come in for updating the world regulatory domain at init |
| 333 | * anyway */ |
| 334 | return 0; |
| 335 | case REGDOM_SET_BY_COUNTRY_IE: |
| 336 | if (last_request->initiator == set_by) { |
| 337 | if (last_request->wiphy != wiphy) { |
| 338 | /* Two cards with two APs claiming different |
| 339 | * different Country IE alpha2s! |
| 340 | * You're special!! */ |
| 341 | if (!alpha2_equal(last_request->alpha2, |
| 342 | cfg80211_regdomain->alpha2)) { |
| 343 | /* XXX: Deal with conflict, consider |
| 344 | * building a new one out of the |
| 345 | * intersection */ |
| 346 | WARN_ON(1); |
| 347 | return -EOPNOTSUPP; |
| 348 | } |
| 349 | return -EALREADY; |
| 350 | } |
| 351 | /* Two consecutive Country IE hints on the same wiphy */ |
| 352 | if (!alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) |
| 353 | return 0; |
| 354 | return -EALREADY; |
| 355 | } |
| 356 | if (WARN_ON(!is_alpha2_set(alpha2) || !is_an_alpha2(alpha2)), |
| 357 | "Invalid Country IE regulatory hint passed " |
| 358 | "to the wireless core\n") |
| 359 | return -EINVAL; |
| 360 | /* We ignore Country IE hints for now, as we haven't yet |
| 361 | * added the dot11MultiDomainCapabilityEnabled flag |
| 362 | * for wiphys */ |
| 363 | return 1; |
| 364 | case REGDOM_SET_BY_DRIVER: |
| 365 | BUG_ON(!wiphy); |
| 366 | if (last_request->initiator == set_by) { |
| 367 | /* Two separate drivers hinting different things, |
| 368 | * this is possible if you have two devices present |
| 369 | * on a system with different EEPROM regulatory |
| 370 | * readings. XXX: Do intersection, we support only |
| 371 | * the first regulatory hint for now */ |
| 372 | if (last_request->wiphy != wiphy) |
| 373 | return -EALREADY; |
| 374 | if (rd) |
| 375 | return -EALREADY; |
| 376 | /* Driver should not be trying to hint different |
| 377 | * regulatory domains! */ |
| 378 | BUG_ON(!alpha2_equal(alpha2, |
| 379 | cfg80211_regdomain->alpha2)); |
| 380 | return -EALREADY; |
| 381 | } |
| 382 | if (last_request->initiator == REGDOM_SET_BY_CORE) |
| 383 | return 0; |
| 384 | /* XXX: Handle intersection, and add the |
| 385 | * dot11MultiDomainCapabilityEnabled flag to wiphy. For now |
| 386 | * we assume the driver has this set to false, following the |
| 387 | * 802.11d dot11MultiDomainCapabilityEnabled documentation */ |
| 388 | if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) |
| 389 | return 0; |
| 390 | return 0; |
| 391 | case REGDOM_SET_BY_USER: |
| 392 | if (last_request->initiator == set_by || |
| 393 | last_request->initiator == REGDOM_SET_BY_CORE) |
| 394 | return 0; |
| 395 | /* Drivers can use their wiphy's reg_notifier() |
| 396 | * to override any information */ |
| 397 | if (last_request->initiator == REGDOM_SET_BY_DRIVER) |
| 398 | return 0; |
| 399 | /* XXX: Handle intersection */ |
| 400 | if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) |
| 401 | return -EOPNOTSUPP; |
| 402 | return 0; |
| 403 | default: |
| 404 | return -EINVAL; |
| 405 | } |
| 406 | } |
| 407 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 408 | static bool __reg_is_valid_request(const char *alpha2, |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 409 | struct regulatory_request **request) |
| 410 | { |
| 411 | struct regulatory_request *req; |
| 412 | if (list_empty(®ulatory_requests)) |
| 413 | return false; |
| 414 | list_for_each_entry(req, ®ulatory_requests, list) { |
| 415 | if (alpha2_equal(req->alpha2, alpha2)) { |
| 416 | *request = req; |
| 417 | return true; |
| 418 | } |
| 419 | } |
| 420 | return false; |
| 421 | } |
| 422 | |
| 423 | /* Used by nl80211 before kmalloc'ing our regulatory domain */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 424 | bool reg_is_valid_request(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 425 | { |
| 426 | struct regulatory_request *request = NULL; |
| 427 | return __reg_is_valid_request(alpha2, &request); |
| 428 | } |
| 429 | |
| 430 | /* Sanity check on a regulatory rule */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 431 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 432 | { |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 433 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 434 | u32 freq_diff; |
| 435 | |
| 436 | if (freq_range->start_freq_khz == 0 || freq_range->end_freq_khz == 0) |
| 437 | return false; |
| 438 | |
| 439 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) |
| 440 | return false; |
| 441 | |
| 442 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
| 443 | |
| 444 | if (freq_range->max_bandwidth_khz > freq_diff) |
| 445 | return false; |
| 446 | |
| 447 | return true; |
| 448 | } |
| 449 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 450 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 451 | { |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 452 | const struct ieee80211_reg_rule *reg_rule = NULL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 453 | unsigned int i; |
| 454 | |
| 455 | if (!rd->n_reg_rules) |
| 456 | return false; |
| 457 | |
| 458 | for (i = 0; i < rd->n_reg_rules; i++) { |
| 459 | reg_rule = &rd->reg_rules[i]; |
| 460 | if (!is_valid_reg_rule(reg_rule)) |
| 461 | return false; |
| 462 | } |
| 463 | |
| 464 | return true; |
| 465 | } |
| 466 | |
| 467 | /* Returns value in KHz */ |
| 468 | static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range, |
| 469 | u32 freq) |
| 470 | { |
| 471 | unsigned int i; |
| 472 | for (i = 0; i < ARRAY_SIZE(supported_bandwidths); i++) { |
| 473 | u32 start_freq_khz = freq - supported_bandwidths[i]/2; |
| 474 | u32 end_freq_khz = freq + supported_bandwidths[i]/2; |
| 475 | if (start_freq_khz >= freq_range->start_freq_khz && |
| 476 | end_freq_khz <= freq_range->end_freq_khz) |
| 477 | return supported_bandwidths[i]; |
| 478 | } |
| 479 | return 0; |
| 480 | } |
| 481 | |
| 482 | /* XXX: add support for the rest of enum nl80211_reg_rule_flags, we may |
| 483 | * want to just have the channel structure use these */ |
| 484 | static u32 map_regdom_flags(u32 rd_flags) |
| 485 | { |
| 486 | u32 channel_flags = 0; |
| 487 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) |
| 488 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; |
| 489 | if (rd_flags & NL80211_RRF_NO_IBSS) |
| 490 | channel_flags |= IEEE80211_CHAN_NO_IBSS; |
| 491 | if (rd_flags & NL80211_RRF_DFS) |
| 492 | channel_flags |= IEEE80211_CHAN_RADAR; |
| 493 | return channel_flags; |
| 494 | } |
| 495 | |
| 496 | /** |
| 497 | * freq_reg_info - get regulatory information for the given frequency |
| 498 | * @center_freq: Frequency in KHz for which we want regulatory information for |
| 499 | * @bandwidth: the bandwidth requirement you have in KHz, if you do not have one |
| 500 | * you can set this to 0. If this frequency is allowed we then set |
| 501 | * this value to the maximum allowed bandwidth. |
| 502 | * @reg_rule: the regulatory rule which we have for this frequency |
| 503 | * |
| 504 | * Use this function to get the regulatory rule for a specific frequency. |
| 505 | */ |
| 506 | static int freq_reg_info(u32 center_freq, u32 *bandwidth, |
| 507 | const struct ieee80211_reg_rule **reg_rule) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 508 | { |
| 509 | int i; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 510 | u32 max_bandwidth = 0; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 511 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 512 | if (!cfg80211_regdomain) |
| 513 | return -EINVAL; |
| 514 | |
| 515 | for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) { |
| 516 | const struct ieee80211_reg_rule *rr; |
| 517 | const struct ieee80211_freq_range *fr = NULL; |
| 518 | const struct ieee80211_power_rule *pr = NULL; |
| 519 | |
| 520 | rr = &cfg80211_regdomain->reg_rules[i]; |
| 521 | fr = &rr->freq_range; |
| 522 | pr = &rr->power_rule; |
| 523 | max_bandwidth = freq_max_bandwidth(fr, center_freq); |
| 524 | if (max_bandwidth && *bandwidth <= max_bandwidth) { |
| 525 | *reg_rule = rr; |
| 526 | *bandwidth = max_bandwidth; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 527 | break; |
| 528 | } |
| 529 | } |
| 530 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 531 | return !max_bandwidth; |
| 532 | } |
| 533 | |
| 534 | static void handle_channel(struct ieee80211_channel *chan) |
| 535 | { |
| 536 | int r; |
| 537 | u32 flags = chan->orig_flags; |
| 538 | u32 max_bandwidth = 0; |
| 539 | const struct ieee80211_reg_rule *reg_rule = NULL; |
| 540 | const struct ieee80211_power_rule *power_rule = NULL; |
| 541 | |
| 542 | r = freq_reg_info(MHZ_TO_KHZ(chan->center_freq), |
| 543 | &max_bandwidth, ®_rule); |
| 544 | |
| 545 | if (r) { |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 546 | flags |= IEEE80211_CHAN_DISABLED; |
| 547 | chan->flags = flags; |
| 548 | return; |
| 549 | } |
| 550 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 551 | power_rule = ®_rule->power_rule; |
| 552 | |
| 553 | chan->flags = flags | map_regdom_flags(reg_rule->flags); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 554 | chan->max_antenna_gain = min(chan->orig_mag, |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 555 | (int) MBI_TO_DBI(power_rule->max_antenna_gain)); |
| 556 | chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); |
John W. Linville | 253898c | 2008-04-03 15:32:54 -0400 | [diff] [blame] | 557 | if (chan->orig_mpwr) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 558 | chan->max_power = min(chan->orig_mpwr, |
| 559 | (int) MBM_TO_DBM(power_rule->max_eirp)); |
John W. Linville | 253898c | 2008-04-03 15:32:54 -0400 | [diff] [blame] | 560 | else |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 561 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 562 | } |
| 563 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 564 | static void handle_band(struct ieee80211_supported_band *sband) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 565 | { |
| 566 | int i; |
| 567 | |
| 568 | for (i = 0; i < sband->n_channels; i++) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 569 | handle_channel(&sband->channels[i]); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 570 | } |
| 571 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 572 | static void update_all_wiphy_regulatory(enum reg_set_by setby) |
| 573 | { |
| 574 | struct cfg80211_registered_device *drv; |
| 575 | |
| 576 | list_for_each_entry(drv, &cfg80211_drv_list, list) |
| 577 | wiphy_update_regulatory(&drv->wiphy, setby); |
| 578 | } |
| 579 | |
| 580 | void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 581 | { |
| 582 | enum ieee80211_band band; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 583 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 584 | if (wiphy->bands[band]) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 585 | handle_band(wiphy->bands[band]); |
| 586 | if (wiphy->reg_notifier) |
| 587 | wiphy->reg_notifier(wiphy, setby); |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | /* Caller must hold &cfg80211_drv_mutex */ |
| 592 | int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by, |
| 593 | const char *alpha2, struct ieee80211_regdomain *rd) |
| 594 | { |
| 595 | struct regulatory_request *request; |
| 596 | char *rd_alpha2; |
| 597 | int r = 0; |
| 598 | |
| 599 | r = ignore_request(wiphy, set_by, (char *) alpha2, rd); |
| 600 | if (r) |
| 601 | return r; |
| 602 | |
| 603 | if (rd) |
| 604 | rd_alpha2 = rd->alpha2; |
| 605 | else |
| 606 | rd_alpha2 = (char *) alpha2; |
| 607 | |
| 608 | switch (set_by) { |
| 609 | case REGDOM_SET_BY_CORE: |
| 610 | case REGDOM_SET_BY_COUNTRY_IE: |
| 611 | case REGDOM_SET_BY_DRIVER: |
| 612 | case REGDOM_SET_BY_USER: |
| 613 | request = kzalloc(sizeof(struct regulatory_request), |
| 614 | GFP_KERNEL); |
| 615 | if (!request) |
| 616 | return -ENOMEM; |
| 617 | |
| 618 | request->alpha2[0] = rd_alpha2[0]; |
| 619 | request->alpha2[1] = rd_alpha2[1]; |
| 620 | request->initiator = set_by; |
| 621 | request->wiphy = wiphy; |
| 622 | |
| 623 | list_add_tail(&request->list, ®ulatory_requests); |
| 624 | if (rd) |
| 625 | break; |
| 626 | r = call_crda(alpha2); |
| 627 | #ifndef CONFIG_WIRELESS_OLD_REGULATORY |
| 628 | if (r) |
| 629 | printk(KERN_ERR "cfg80211: Failed calling CRDA\n"); |
| 630 | #endif |
| 631 | break; |
| 632 | default: |
| 633 | r = -ENOTSUPP; |
| 634 | break; |
| 635 | } |
| 636 | |
| 637 | return r; |
| 638 | } |
| 639 | |
| 640 | /* If rd is not NULL and if this call fails the caller must free it */ |
| 641 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2, |
| 642 | struct ieee80211_regdomain *rd) |
| 643 | { |
| 644 | int r; |
| 645 | BUG_ON(!rd && !alpha2); |
| 646 | |
| 647 | mutex_lock(&cfg80211_drv_mutex); |
| 648 | |
| 649 | r = __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2, rd); |
| 650 | if (r || !rd) |
| 651 | goto unlock_and_exit; |
| 652 | |
| 653 | /* If the driver passed a regulatory domain we skipped asking |
| 654 | * userspace for one so we can now go ahead and set it */ |
| 655 | r = set_regdom(rd); |
| 656 | |
| 657 | unlock_and_exit: |
| 658 | mutex_unlock(&cfg80211_drv_mutex); |
| 659 | return r; |
| 660 | } |
| 661 | EXPORT_SYMBOL(regulatory_hint); |
| 662 | |
| 663 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 664 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 665 | { |
| 666 | unsigned int i; |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 667 | const struct ieee80211_reg_rule *reg_rule = NULL; |
| 668 | const struct ieee80211_freq_range *freq_range = NULL; |
| 669 | const struct ieee80211_power_rule *power_rule = NULL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 670 | |
| 671 | printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), " |
| 672 | "(max_antenna_gain, max_eirp)\n"); |
| 673 | |
| 674 | for (i = 0; i < rd->n_reg_rules; i++) { |
| 675 | reg_rule = &rd->reg_rules[i]; |
| 676 | freq_range = ®_rule->freq_range; |
| 677 | power_rule = ®_rule->power_rule; |
| 678 | |
| 679 | /* There may not be documentation for max antenna gain |
| 680 | * in certain regions */ |
| 681 | if (power_rule->max_antenna_gain) |
| 682 | printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " |
| 683 | "(%d mBi, %d mBm)\n", |
| 684 | freq_range->start_freq_khz, |
| 685 | freq_range->end_freq_khz, |
| 686 | freq_range->max_bandwidth_khz, |
| 687 | power_rule->max_antenna_gain, |
| 688 | power_rule->max_eirp); |
| 689 | else |
| 690 | printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " |
| 691 | "(N/A, %d mBm)\n", |
| 692 | freq_range->start_freq_khz, |
| 693 | freq_range->end_freq_khz, |
| 694 | freq_range->max_bandwidth_khz, |
| 695 | power_rule->max_eirp); |
| 696 | } |
| 697 | } |
| 698 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 699 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 700 | { |
| 701 | |
| 702 | if (is_world_regdom(rd->alpha2)) |
| 703 | printk(KERN_INFO "cfg80211: World regulatory " |
| 704 | "domain updated:\n"); |
| 705 | else { |
| 706 | if (is_unknown_alpha2(rd->alpha2)) |
| 707 | printk(KERN_INFO "cfg80211: Regulatory domain " |
| 708 | "changed to driver built-in settings " |
| 709 | "(unknown country)\n"); |
| 710 | else |
| 711 | printk(KERN_INFO "cfg80211: Regulatory domain " |
| 712 | "changed to country: %c%c\n", |
| 713 | rd->alpha2[0], rd->alpha2[1]); |
| 714 | } |
| 715 | print_rd_rules(rd); |
| 716 | } |
| 717 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 718 | void print_regdomain_info(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 719 | { |
| 720 | printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", |
| 721 | rd->alpha2[0], rd->alpha2[1]); |
| 722 | print_rd_rules(rd); |
| 723 | } |
| 724 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 725 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 726 | { |
| 727 | struct regulatory_request *request = NULL; |
| 728 | |
| 729 | /* Some basic sanity checks first */ |
| 730 | |
| 731 | #ifdef CONFIG_WIRELESS_OLD_REGULATORY |
| 732 | /* We ignore the world regdom with the old static regdomains setup |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 733 | * as there is no point to it with static regulatory definitions :( |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 734 | * Don't worry this shit will be removed soon... */ |
| 735 | if (is_world_regdom(rd->alpha2)) |
| 736 | return -EINVAL; |
| 737 | #else |
| 738 | if (is_world_regdom(rd->alpha2)) { |
| 739 | if (WARN_ON(!__reg_is_valid_request(rd->alpha2, &request))) |
| 740 | return -EINVAL; |
| 741 | update_world_regdomain(rd); |
| 742 | return 0; |
| 743 | } |
| 744 | #endif |
| 745 | |
| 746 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
| 747 | !is_unknown_alpha2(rd->alpha2)) |
| 748 | return -EINVAL; |
| 749 | |
| 750 | if (list_empty(®ulatory_requests)) |
| 751 | return -EINVAL; |
| 752 | |
| 753 | #ifdef CONFIG_WIRELESS_OLD_REGULATORY |
| 754 | /* Static "US" and "JP" will be overridden, but just once */ |
| 755 | if (!is_old_static_regdom(cfg80211_regdomain) && |
| 756 | !regdom_changed(rd->alpha2)) |
| 757 | return -EINVAL; |
| 758 | #else |
| 759 | if (!regdom_changed(rd->alpha2)) |
| 760 | return -EINVAL; |
| 761 | #endif |
| 762 | |
| 763 | /* Now lets set the regulatory domain, update all driver channels |
| 764 | * and finally inform them of what we have done, in case they want |
| 765 | * to review or adjust their own settings based on their own |
| 766 | * internal EEPROM data */ |
| 767 | |
| 768 | if (WARN_ON(!__reg_is_valid_request(rd->alpha2, &request))) |
| 769 | return -EINVAL; |
| 770 | |
| 771 | #ifdef CONFIG_WIRELESS_OLD_REGULATORY |
| 772 | reset_regdomains_static(); |
| 773 | #else |
| 774 | reset_regdomains(); |
| 775 | #endif |
| 776 | |
| 777 | /* Country IE parsing coming soon */ |
| 778 | switch (request->initiator) { |
| 779 | case REGDOM_SET_BY_CORE: |
| 780 | case REGDOM_SET_BY_DRIVER: |
| 781 | case REGDOM_SET_BY_USER: |
| 782 | if (!is_valid_rd(rd)) { |
| 783 | printk(KERN_ERR "cfg80211: Invalid " |
| 784 | "regulatory domain detected:\n"); |
| 785 | print_regdomain_info(rd); |
| 786 | return -EINVAL; |
| 787 | } |
| 788 | break; |
| 789 | case REGDOM_SET_BY_COUNTRY_IE: /* Not yet */ |
| 790 | WARN_ON(1); |
| 791 | default: |
| 792 | return -EOPNOTSUPP; |
| 793 | } |
| 794 | |
| 795 | /* Tada! */ |
| 796 | cfg80211_regdomain = rd; |
| 797 | request->granted = 1; |
| 798 | |
| 799 | return 0; |
| 800 | } |
| 801 | |
| 802 | |
| 803 | /* Use this call to set the current regulatory domain. Conflicts with |
| 804 | * multiple drivers can be ironed out later. Caller must've already |
| 805 | * kmalloc'd the rd structure. If this calls fails you should kfree() |
| 806 | * the passed rd. Caller must hold cfg80211_drv_mutex */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 807 | int set_regdom(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 808 | { |
| 809 | struct regulatory_request *this_request = NULL, *prev_request = NULL; |
| 810 | int r; |
| 811 | |
| 812 | if (!list_empty(®ulatory_requests)) |
| 813 | prev_request = list_first_entry(®ulatory_requests, |
| 814 | struct regulatory_request, list); |
| 815 | |
| 816 | /* Note that this doesn't update the wiphys, this is done below */ |
| 817 | r = __set_regdom(rd); |
| 818 | if (r) |
| 819 | return r; |
| 820 | |
| 821 | BUG_ON((!__reg_is_valid_request(rd->alpha2, &this_request))); |
| 822 | |
| 823 | /* The initial standard core update of the world regulatory domain, no |
| 824 | * need to keep that request info around if it didn't fail. */ |
| 825 | if (is_world_regdom(rd->alpha2) && |
| 826 | this_request->initiator == REGDOM_SET_BY_CORE && |
| 827 | this_request->granted) { |
| 828 | list_del(&this_request->list); |
| 829 | kfree(this_request); |
| 830 | this_request = NULL; |
| 831 | } |
| 832 | |
| 833 | /* Remove old requests, we only leave behind the last one */ |
| 834 | if (prev_request) { |
| 835 | list_del(&prev_request->list); |
| 836 | kfree(prev_request); |
| 837 | prev_request = NULL; |
| 838 | } |
| 839 | |
| 840 | /* This would make this whole thing pointless */ |
| 841 | BUG_ON(rd != cfg80211_regdomain); |
| 842 | |
| 843 | /* update all wiphys now with the new established regulatory domain */ |
| 844 | update_all_wiphy_regulatory(this_request->initiator); |
| 845 | |
| 846 | print_regdomain(rd); |
| 847 | |
| 848 | return r; |
| 849 | } |
| 850 | |
| 851 | int regulatory_init(void) |
| 852 | { |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 853 | int err; |
| 854 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 855 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
| 856 | if (IS_ERR(reg_pdev)) |
| 857 | return PTR_ERR(reg_pdev); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 858 | |
| 859 | #ifdef CONFIG_WIRELESS_OLD_REGULATORY |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 860 | cfg80211_regdomain = static_regdom(ieee80211_regdom); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 861 | /* Used during reset_regdomains_static() */ |
| 862 | cfg80211_world_regdom = cfg80211_regdomain; |
| 863 | |
| 864 | printk(KERN_INFO "cfg80211: Using old static regulatory domain:\n"); |
| 865 | print_regdomain_info(cfg80211_regdomain); |
| 866 | /* The old code still requests for a new regdomain and if |
| 867 | * you have CRDA you get it updated, otherwise you get |
| 868 | * stuck with the static values. We ignore "EU" code as |
| 869 | * that is not a valid ISO / IEC 3166 alpha2 */ |
| 870 | if (ieee80211_regdom[0] != 'E' && ieee80211_regdom[1] != 'U') |
| 871 | err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, |
| 872 | ieee80211_regdom, NULL); |
| 873 | #else |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame^] | 874 | cfg80211_regdomain = cfg80211_world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 875 | |
| 876 | err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", NULL); |
| 877 | if (err) |
| 878 | printk(KERN_ERR "cfg80211: calling CRDA failed - " |
| 879 | "unable to update world regulatory domain, " |
| 880 | "using static definition\n"); |
| 881 | #endif |
| 882 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 883 | return 0; |
| 884 | } |
| 885 | |
| 886 | void regulatory_exit(void) |
| 887 | { |
| 888 | struct regulatory_request *req, *req_tmp; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 889 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 890 | mutex_lock(&cfg80211_drv_mutex); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 891 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 892 | #ifdef CONFIG_WIRELESS_OLD_REGULATORY |
| 893 | reset_regdomains_static(); |
| 894 | #else |
| 895 | reset_regdomains(); |
| 896 | #endif |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 897 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 898 | list_for_each_entry_safe(req, req_tmp, ®ulatory_requests, list) { |
| 899 | list_del(&req->list); |
| 900 | kfree(req); |
| 901 | } |
| 902 | platform_device_unregister(reg_pdev); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 903 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 904 | mutex_unlock(&cfg80211_drv_mutex); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 905 | } |