18318d78aSJohannes Berg /* 28318d78aSJohannes Berg * Copyright 2002-2005, Instant802 Networks, Inc. 38318d78aSJohannes Berg * Copyright 2005-2006, Devicescape Software, Inc. 48318d78aSJohannes Berg * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 5b2e1b302SLuis R. Rodriguez * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com> 68318d78aSJohannes Berg * 78318d78aSJohannes Berg * This program is free software; you can redistribute it and/or modify 88318d78aSJohannes Berg * it under the terms of the GNU General Public License version 2 as 98318d78aSJohannes Berg * published by the Free Software Foundation. 108318d78aSJohannes Berg */ 118318d78aSJohannes Berg 12b2e1b302SLuis R. Rodriguez /** 13b2e1b302SLuis R. Rodriguez * DOC: Wireless regulatory infrastructure 148318d78aSJohannes Berg * 158318d78aSJohannes Berg * The usual implementation is for a driver to read a device EEPROM to 168318d78aSJohannes Berg * determine which regulatory domain it should be operating under, then 178318d78aSJohannes Berg * looking up the allowable channels in a driver-local table and finally 188318d78aSJohannes Berg * registering those channels in the wiphy structure. 198318d78aSJohannes Berg * 20b2e1b302SLuis R. Rodriguez * Another set of compliance enforcement is for drivers to use their 21b2e1b302SLuis R. Rodriguez * own compliance limits which can be stored on the EEPROM. The host 22b2e1b302SLuis R. Rodriguez * driver or firmware may ensure these are used. 23b2e1b302SLuis R. Rodriguez * 24b2e1b302SLuis R. Rodriguez * In addition to all this we provide an extra layer of regulatory 25b2e1b302SLuis R. Rodriguez * conformance. For drivers which do not have any regulatory 26b2e1b302SLuis R. Rodriguez * information CRDA provides the complete regulatory solution. 27b2e1b302SLuis R. Rodriguez * For others it provides a community effort on further restrictions 28b2e1b302SLuis R. Rodriguez * to enhance compliance. 29b2e1b302SLuis R. Rodriguez * 30b2e1b302SLuis R. Rodriguez * Note: When number of rules --> infinity we will not be able to 31b2e1b302SLuis R. Rodriguez * index on alpha2 any more, instead we'll probably have to 32b2e1b302SLuis R. Rodriguez * rely on some SHA1 checksum of the regdomain for example. 33b2e1b302SLuis R. Rodriguez * 348318d78aSJohannes Berg */ 358318d78aSJohannes Berg #include <linux/kernel.h> 36b2e1b302SLuis R. Rodriguez #include <linux/list.h> 37b2e1b302SLuis R. Rodriguez #include <linux/random.h> 38b2e1b302SLuis R. Rodriguez #include <linux/nl80211.h> 39b2e1b302SLuis R. Rodriguez #include <linux/platform_device.h> 408318d78aSJohannes Berg #include <net/wireless.h> 41b2e1b302SLuis R. Rodriguez #include <net/cfg80211.h> 428318d78aSJohannes Berg #include "core.h" 43b2e1b302SLuis R. Rodriguez #include "reg.h" 448318d78aSJohannes Berg 455166ccd2SLuis R. Rodriguez /* Receipt of information from last regulatory request */ 46f6037d09SJohannes Berg static struct regulatory_request *last_request; 47734366deSJohannes Berg 48b2e1b302SLuis R. Rodriguez /* To trigger userspace events */ 49b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 508318d78aSJohannes Berg 51b2e1b302SLuis R. Rodriguez /* Keep the ordering from large to small */ 52b2e1b302SLuis R. Rodriguez static u32 supported_bandwidths[] = { 53b2e1b302SLuis R. Rodriguez MHZ_TO_KHZ(40), 54b2e1b302SLuis R. Rodriguez MHZ_TO_KHZ(20), 558318d78aSJohannes Berg }; 568318d78aSJohannes Berg 57fb1fc7adSLuis R. Rodriguez /* 58fb1fc7adSLuis R. Rodriguez * Central wireless core regulatory domains, we only need two, 59734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 60fb1fc7adSLuis R. Rodriguez * information to give us an alpha2 61fb1fc7adSLuis R. Rodriguez */ 62f130347cSLuis R. Rodriguez const struct ieee80211_regdomain *cfg80211_regdomain; 63734366deSJohannes Berg 64fb1fc7adSLuis R. Rodriguez /* 65fb1fc7adSLuis R. Rodriguez * We use this as a place for the rd structure built from the 663f2355cbSLuis R. Rodriguez * last parsed country IE to rest until CRDA gets back to us with 67fb1fc7adSLuis R. Rodriguez * what it thinks should apply for the same country 68fb1fc7adSLuis R. Rodriguez */ 693f2355cbSLuis R. Rodriguez static const struct ieee80211_regdomain *country_ie_regdomain; 703f2355cbSLuis R. Rodriguez 71e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 72fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 73fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 74fe33eb39SLuis R. Rodriguez 75e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 76e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 77e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 78e38f8a7aSLuis R. Rodriguez 79e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 80e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 81e38f8a7aSLuis R. Rodriguez 82e38f8a7aSLuis R. Rodriguez struct reg_beacon { 83e38f8a7aSLuis R. Rodriguez struct list_head list; 84e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 85e38f8a7aSLuis R. Rodriguez }; 86e38f8a7aSLuis R. Rodriguez 87734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 88734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 89611b6a82SLuis R. Rodriguez .n_reg_rules = 5, 90734366deSJohannes Berg .alpha2 = "00", 91734366deSJohannes Berg .reg_rules = { 9268798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 9368798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 94611b6a82SLuis R. Rodriguez /* IEEE 802.11b/g, channels 12..13. No HT40 95611b6a82SLuis R. Rodriguez * channel fits here. */ 96611b6a82SLuis R. Rodriguez REG_RULE(2467-10, 2472+10, 20, 6, 20, 97611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 98611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 99611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 100611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 101611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 102611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 103611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS | 104611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 1053fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 106ec329aceSLuis R. Rodriguez REG_RULE(5180-10, 5240+10, 40, 6, 20, 1073fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1083fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 1093fc71f77SLuis R. Rodriguez 1103fc71f77SLuis R. Rodriguez /* NB: 5260 MHz - 5700 MHz requies DFS */ 1113fc71f77SLuis R. Rodriguez 1123fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 113ec329aceSLuis R. Rodriguez REG_RULE(5745-10, 5825+10, 40, 6, 20, 1143fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1153fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 116734366deSJohannes Berg } 117734366deSJohannes Berg }; 118734366deSJohannes Berg 119a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 120a3d2eaf0SJohannes Berg &world_regdom; 121734366deSJohannes Berg 122734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 123734366deSJohannes Berg static char *ieee80211_regdom = "US"; 124734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 125734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 126734366deSJohannes Berg 127fb1fc7adSLuis R. Rodriguez /* 128fb1fc7adSLuis R. Rodriguez * We assume 40 MHz bandwidth for the old regulatory work. 129734366deSJohannes Berg * We make emphasis we are using the exact same frequencies 130fb1fc7adSLuis R. Rodriguez * as before 131fb1fc7adSLuis R. Rodriguez */ 132734366deSJohannes Berg 133734366deSJohannes Berg static const struct ieee80211_regdomain us_regdom = { 134734366deSJohannes Berg .n_reg_rules = 6, 135734366deSJohannes Berg .alpha2 = "US", 136734366deSJohannes Berg .reg_rules = { 137734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..11 */ 138734366deSJohannes Berg REG_RULE(2412-10, 2462+10, 40, 6, 27, 0), 139734366deSJohannes Berg /* IEEE 802.11a, channel 36 */ 140734366deSJohannes Berg REG_RULE(5180-10, 5180+10, 40, 6, 23, 0), 141734366deSJohannes Berg /* IEEE 802.11a, channel 40 */ 142734366deSJohannes Berg REG_RULE(5200-10, 5200+10, 40, 6, 23, 0), 143734366deSJohannes Berg /* IEEE 802.11a, channel 44 */ 144734366deSJohannes Berg REG_RULE(5220-10, 5220+10, 40, 6, 23, 0), 145734366deSJohannes Berg /* IEEE 802.11a, channels 48..64 */ 146734366deSJohannes Berg REG_RULE(5240-10, 5320+10, 40, 6, 23, 0), 147734366deSJohannes Berg /* IEEE 802.11a, channels 149..165, outdoor */ 148734366deSJohannes Berg REG_RULE(5745-10, 5825+10, 40, 6, 30, 0), 149734366deSJohannes Berg } 150734366deSJohannes Berg }; 151734366deSJohannes Berg 152734366deSJohannes Berg static const struct ieee80211_regdomain jp_regdom = { 153734366deSJohannes Berg .n_reg_rules = 3, 154734366deSJohannes Berg .alpha2 = "JP", 155734366deSJohannes Berg .reg_rules = { 156734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..14 */ 157734366deSJohannes Berg REG_RULE(2412-10, 2484+10, 40, 6, 20, 0), 158734366deSJohannes Berg /* IEEE 802.11a, channels 34..48 */ 159734366deSJohannes Berg REG_RULE(5170-10, 5240+10, 40, 6, 20, 160734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 161734366deSJohannes Berg /* IEEE 802.11a, channels 52..64 */ 162734366deSJohannes Berg REG_RULE(5260-10, 5320+10, 40, 6, 20, 163734366deSJohannes Berg NL80211_RRF_NO_IBSS | 164734366deSJohannes Berg NL80211_RRF_DFS), 165734366deSJohannes Berg } 166734366deSJohannes Berg }; 167734366deSJohannes Berg 168734366deSJohannes Berg static const struct ieee80211_regdomain eu_regdom = { 169734366deSJohannes Berg .n_reg_rules = 6, 170fb1fc7adSLuis R. Rodriguez /* 171fb1fc7adSLuis R. Rodriguez * This alpha2 is bogus, we leave it here just for stupid 172fb1fc7adSLuis R. Rodriguez * backward compatibility 173fb1fc7adSLuis R. Rodriguez */ 174734366deSJohannes Berg .alpha2 = "EU", 175734366deSJohannes Berg .reg_rules = { 176734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..13 */ 177734366deSJohannes Berg REG_RULE(2412-10, 2472+10, 40, 6, 20, 0), 178734366deSJohannes Berg /* IEEE 802.11a, channel 36 */ 179734366deSJohannes Berg REG_RULE(5180-10, 5180+10, 40, 6, 23, 180734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 181734366deSJohannes Berg /* IEEE 802.11a, channel 40 */ 182734366deSJohannes Berg REG_RULE(5200-10, 5200+10, 40, 6, 23, 183734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 184734366deSJohannes Berg /* IEEE 802.11a, channel 44 */ 185734366deSJohannes Berg REG_RULE(5220-10, 5220+10, 40, 6, 23, 186734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 187734366deSJohannes Berg /* IEEE 802.11a, channels 48..64 */ 188734366deSJohannes Berg REG_RULE(5240-10, 5320+10, 40, 6, 20, 189734366deSJohannes Berg NL80211_RRF_NO_IBSS | 190734366deSJohannes Berg NL80211_RRF_DFS), 191734366deSJohannes Berg /* IEEE 802.11a, channels 100..140 */ 192734366deSJohannes Berg REG_RULE(5500-10, 5700+10, 40, 6, 30, 193734366deSJohannes Berg NL80211_RRF_NO_IBSS | 194734366deSJohannes Berg NL80211_RRF_DFS), 195734366deSJohannes Berg } 196734366deSJohannes Berg }; 197734366deSJohannes Berg 198734366deSJohannes Berg static const struct ieee80211_regdomain *static_regdom(char *alpha2) 199734366deSJohannes Berg { 200734366deSJohannes Berg if (alpha2[0] == 'U' && alpha2[1] == 'S') 201734366deSJohannes Berg return &us_regdom; 202734366deSJohannes Berg if (alpha2[0] == 'J' && alpha2[1] == 'P') 203734366deSJohannes Berg return &jp_regdom; 204734366deSJohannes Berg if (alpha2[0] == 'E' && alpha2[1] == 'U') 205734366deSJohannes Berg return &eu_regdom; 206734366deSJohannes Berg /* Default, as per the old rules */ 207734366deSJohannes Berg return &us_regdom; 208734366deSJohannes Berg } 209734366deSJohannes Berg 210a3d2eaf0SJohannes Berg static bool is_old_static_regdom(const struct ieee80211_regdomain *rd) 211734366deSJohannes Berg { 212734366deSJohannes Berg if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom) 213734366deSJohannes Berg return true; 214734366deSJohannes Berg return false; 215734366deSJohannes Berg } 216734366deSJohannes Berg #else 217942b25cfSJohannes Berg static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd) 218942b25cfSJohannes Berg { 219942b25cfSJohannes Berg return false; 220942b25cfSJohannes Berg } 221942b25cfSJohannes Berg #endif 222942b25cfSJohannes Berg 223734366deSJohannes Berg static void reset_regdomains(void) 224734366deSJohannes Berg { 225942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 226942b25cfSJohannes Berg if (cfg80211_regdomain == cfg80211_world_regdom) 227942b25cfSJohannes Berg cfg80211_regdomain = NULL; 228942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 229942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 230942b25cfSJohannes Berg if (cfg80211_regdomain == &world_regdom) 231942b25cfSJohannes Berg cfg80211_regdomain = NULL; 232942b25cfSJohannes Berg if (is_old_static_regdom(cfg80211_regdomain)) 233942b25cfSJohannes Berg cfg80211_regdomain = NULL; 234942b25cfSJohannes Berg 235734366deSJohannes Berg kfree(cfg80211_regdomain); 236734366deSJohannes Berg kfree(cfg80211_world_regdom); 237734366deSJohannes Berg 238a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 239734366deSJohannes Berg cfg80211_regdomain = NULL; 240734366deSJohannes Berg } 241734366deSJohannes Berg 242fb1fc7adSLuis R. Rodriguez /* 243fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 244fb1fc7adSLuis R. Rodriguez * core upon initialization 245fb1fc7adSLuis R. Rodriguez */ 246a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 247734366deSJohannes Berg { 248f6037d09SJohannes Berg BUG_ON(!last_request); 249734366deSJohannes Berg 250734366deSJohannes Berg reset_regdomains(); 251734366deSJohannes Berg 252734366deSJohannes Berg cfg80211_world_regdom = rd; 253734366deSJohannes Berg cfg80211_regdomain = rd; 254734366deSJohannes Berg } 255734366deSJohannes Berg 256a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 257b2e1b302SLuis R. Rodriguez { 258b2e1b302SLuis R. Rodriguez if (!alpha2) 259b2e1b302SLuis R. Rodriguez return false; 260b2e1b302SLuis R. Rodriguez if (alpha2[0] == '0' && alpha2[1] == '0') 261b2e1b302SLuis R. Rodriguez return true; 262b2e1b302SLuis R. Rodriguez return false; 263b2e1b302SLuis R. Rodriguez } 264b2e1b302SLuis R. Rodriguez 265a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 266b2e1b302SLuis R. Rodriguez { 267b2e1b302SLuis R. Rodriguez if (!alpha2) 268b2e1b302SLuis R. Rodriguez return false; 269b2e1b302SLuis R. Rodriguez if (alpha2[0] != 0 && alpha2[1] != 0) 270b2e1b302SLuis R. Rodriguez return true; 271b2e1b302SLuis R. Rodriguez return false; 272b2e1b302SLuis R. Rodriguez } 273b2e1b302SLuis R. Rodriguez 274b2e1b302SLuis R. Rodriguez static bool is_alpha_upper(char letter) 275b2e1b302SLuis R. Rodriguez { 276b2e1b302SLuis R. Rodriguez /* ASCII A - Z */ 277b2e1b302SLuis R. Rodriguez if (letter >= 65 && letter <= 90) 278b2e1b302SLuis R. Rodriguez return true; 279b2e1b302SLuis R. Rodriguez return false; 280b2e1b302SLuis R. Rodriguez } 281b2e1b302SLuis R. Rodriguez 282a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 283b2e1b302SLuis R. Rodriguez { 284b2e1b302SLuis R. Rodriguez if (!alpha2) 285b2e1b302SLuis R. Rodriguez return false; 286fb1fc7adSLuis R. Rodriguez /* 287fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 288fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 289fb1fc7adSLuis R. Rodriguez */ 290b2e1b302SLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '9') 291b2e1b302SLuis R. Rodriguez return true; 292b2e1b302SLuis R. Rodriguez return false; 293b2e1b302SLuis R. Rodriguez } 294b2e1b302SLuis R. Rodriguez 2953f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2963f2355cbSLuis R. Rodriguez { 2973f2355cbSLuis R. Rodriguez if (!alpha2) 2983f2355cbSLuis R. Rodriguez return false; 299fb1fc7adSLuis R. Rodriguez /* 300fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 3013f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 302fb1fc7adSLuis R. Rodriguez * structures 303fb1fc7adSLuis R. Rodriguez */ 3043f2355cbSLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '8') 3053f2355cbSLuis R. Rodriguez return true; 3063f2355cbSLuis R. Rodriguez return false; 3073f2355cbSLuis R. Rodriguez } 3083f2355cbSLuis R. Rodriguez 309a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 310b2e1b302SLuis R. Rodriguez { 311b2e1b302SLuis R. Rodriguez if (!alpha2) 312b2e1b302SLuis R. Rodriguez return false; 313b2e1b302SLuis R. Rodriguez if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) 314b2e1b302SLuis R. Rodriguez return true; 315b2e1b302SLuis R. Rodriguez return false; 316b2e1b302SLuis R. Rodriguez } 317b2e1b302SLuis R. Rodriguez 318a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 319b2e1b302SLuis R. Rodriguez { 320b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 321b2e1b302SLuis R. Rodriguez return false; 322b2e1b302SLuis R. Rodriguez if (alpha2_x[0] == alpha2_y[0] && 323b2e1b302SLuis R. Rodriguez alpha2_x[1] == alpha2_y[1]) 324b2e1b302SLuis R. Rodriguez return true; 325b2e1b302SLuis R. Rodriguez return false; 326b2e1b302SLuis R. Rodriguez } 327b2e1b302SLuis R. Rodriguez 32869b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 329b2e1b302SLuis R. Rodriguez { 330761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 331761cf7ecSLuis R. Rodriguez 332b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 333b2e1b302SLuis R. Rodriguez return true; 334b2e1b302SLuis R. Rodriguez if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 335b2e1b302SLuis R. Rodriguez return false; 336b2e1b302SLuis R. Rodriguez return true; 337b2e1b302SLuis R. Rodriguez } 338b2e1b302SLuis R. Rodriguez 3393f2355cbSLuis R. Rodriguez /** 3403f2355cbSLuis R. Rodriguez * country_ie_integrity_changes - tells us if the country IE has changed 3413f2355cbSLuis R. Rodriguez * @checksum: checksum of country IE of fields we are interested in 3423f2355cbSLuis R. Rodriguez * 3433f2355cbSLuis R. Rodriguez * If the country IE has not changed you can ignore it safely. This is 3443f2355cbSLuis R. Rodriguez * useful to determine if two devices are seeing two different country IEs 3453f2355cbSLuis R. Rodriguez * even on the same alpha2. Note that this will return false if no IE has 3463f2355cbSLuis R. Rodriguez * been set on the wireless core yet. 3473f2355cbSLuis R. Rodriguez */ 3483f2355cbSLuis R. Rodriguez static bool country_ie_integrity_changes(u32 checksum) 3493f2355cbSLuis R. Rodriguez { 3503f2355cbSLuis R. Rodriguez /* If no IE has been set then the checksum doesn't change */ 3513f2355cbSLuis R. Rodriguez if (unlikely(!last_request->country_ie_checksum)) 3523f2355cbSLuis R. Rodriguez return false; 3533f2355cbSLuis R. Rodriguez if (unlikely(last_request->country_ie_checksum != checksum)) 3543f2355cbSLuis R. Rodriguez return true; 3553f2355cbSLuis R. Rodriguez return false; 3563f2355cbSLuis R. Rodriguez } 3573f2355cbSLuis R. Rodriguez 358fb1fc7adSLuis R. Rodriguez /* 359fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 360fb1fc7adSLuis R. Rodriguez * basis in userspace. 361fb1fc7adSLuis R. Rodriguez */ 362b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 363b2e1b302SLuis R. Rodriguez { 364b2e1b302SLuis R. Rodriguez char country_env[9 + 2] = "COUNTRY="; 365b2e1b302SLuis R. Rodriguez char *envp[] = { 366b2e1b302SLuis R. Rodriguez country_env, 367b2e1b302SLuis R. Rodriguez NULL 3688318d78aSJohannes Berg }; 3698318d78aSJohannes Berg 370b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 371b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", 372b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 373b2e1b302SLuis R. Rodriguez else 374b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA to update world " 375b2e1b302SLuis R. Rodriguez "regulatory domain\n"); 3768318d78aSJohannes Berg 377b2e1b302SLuis R. Rodriguez country_env[8] = alpha2[0]; 378b2e1b302SLuis R. Rodriguez country_env[9] = alpha2[1]; 3798318d78aSJohannes Berg 380b2e1b302SLuis R. Rodriguez return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); 381b2e1b302SLuis R. Rodriguez } 382b2e1b302SLuis R. Rodriguez 383b2e1b302SLuis R. Rodriguez /* Used by nl80211 before kmalloc'ing our regulatory domain */ 384a3d2eaf0SJohannes Berg bool reg_is_valid_request(const char *alpha2) 385b2e1b302SLuis R. Rodriguez { 386f6037d09SJohannes Berg if (!last_request) 387f6037d09SJohannes Berg return false; 388f6037d09SJohannes Berg 389f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 390b2e1b302SLuis R. Rodriguez } 391b2e1b302SLuis R. Rodriguez 392b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 393a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 394b2e1b302SLuis R. Rodriguez { 395a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 396b2e1b302SLuis R. Rodriguez u32 freq_diff; 397b2e1b302SLuis R. Rodriguez 39891e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 399b2e1b302SLuis R. Rodriguez return false; 400b2e1b302SLuis R. Rodriguez 401b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 402b2e1b302SLuis R. Rodriguez return false; 403b2e1b302SLuis R. Rodriguez 404b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 405b2e1b302SLuis R. Rodriguez 406bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 407bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 408b2e1b302SLuis R. Rodriguez return false; 409b2e1b302SLuis R. Rodriguez 410b2e1b302SLuis R. Rodriguez return true; 411b2e1b302SLuis R. Rodriguez } 412b2e1b302SLuis R. Rodriguez 413a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 414b2e1b302SLuis R. Rodriguez { 415a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 416b2e1b302SLuis R. Rodriguez unsigned int i; 417b2e1b302SLuis R. Rodriguez 418b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 419b2e1b302SLuis R. Rodriguez return false; 420b2e1b302SLuis R. Rodriguez 42188dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 42288dc1c3fSLuis R. Rodriguez return false; 42388dc1c3fSLuis R. Rodriguez 424b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 425b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 426b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 427b2e1b302SLuis R. Rodriguez return false; 428b2e1b302SLuis R. Rodriguez } 429b2e1b302SLuis R. Rodriguez 430b2e1b302SLuis R. Rodriguez return true; 431b2e1b302SLuis R. Rodriguez } 432b2e1b302SLuis R. Rodriguez 433b2e1b302SLuis R. Rodriguez /* Returns value in KHz */ 434b2e1b302SLuis R. Rodriguez static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range, 435b2e1b302SLuis R. Rodriguez u32 freq) 436b2e1b302SLuis R. Rodriguez { 437b2e1b302SLuis R. Rodriguez unsigned int i; 438b2e1b302SLuis R. Rodriguez for (i = 0; i < ARRAY_SIZE(supported_bandwidths); i++) { 439b2e1b302SLuis R. Rodriguez u32 start_freq_khz = freq - supported_bandwidths[i]/2; 440b2e1b302SLuis R. Rodriguez u32 end_freq_khz = freq + supported_bandwidths[i]/2; 441b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 442b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 443b2e1b302SLuis R. Rodriguez return supported_bandwidths[i]; 444b2e1b302SLuis R. Rodriguez } 445b2e1b302SLuis R. Rodriguez return 0; 446b2e1b302SLuis R. Rodriguez } 447b2e1b302SLuis R. Rodriguez 4480c7dc45dSLuis R. Rodriguez /** 4490c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 4500c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 4510c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 4520c7dc45dSLuis R. Rodriguez * 4530c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 4540c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 4550c7dc45dSLuis R. Rodriguez * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is 4560c7dc45dSLuis R. Rodriguez * safe for now to assume that a frequency rule should not be part of a 4570c7dc45dSLuis R. Rodriguez * frequency's band if the start freq or end freq are off by more than 2 GHz. 4580c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 4590c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 4600c7dc45dSLuis R. Rodriguez **/ 4610c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 4620c7dc45dSLuis R. Rodriguez u32 freq_khz) 4630c7dc45dSLuis R. Rodriguez { 4640c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 4650c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4660c7dc45dSLuis R. Rodriguez return true; 4670c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4680c7dc45dSLuis R. Rodriguez return true; 4690c7dc45dSLuis R. Rodriguez return false; 4700c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 4710c7dc45dSLuis R. Rodriguez } 4720c7dc45dSLuis R. Rodriguez 473fb1fc7adSLuis R. Rodriguez /* 474fb1fc7adSLuis R. Rodriguez * Converts a country IE to a regulatory domain. A regulatory domain 4753f2355cbSLuis R. Rodriguez * structure has a lot of information which the IE doesn't yet have, 4763f2355cbSLuis R. Rodriguez * so for the other values we use upper max values as we will intersect 477fb1fc7adSLuis R. Rodriguez * with our userspace regulatory agent to get lower bounds. 478fb1fc7adSLuis R. Rodriguez */ 4793f2355cbSLuis R. Rodriguez static struct ieee80211_regdomain *country_ie_2_rd( 4803f2355cbSLuis R. Rodriguez u8 *country_ie, 4813f2355cbSLuis R. Rodriguez u8 country_ie_len, 4823f2355cbSLuis R. Rodriguez u32 *checksum) 4833f2355cbSLuis R. Rodriguez { 4843f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 4853f2355cbSLuis R. Rodriguez unsigned int i = 0; 4863f2355cbSLuis R. Rodriguez char alpha2[2]; 4873f2355cbSLuis R. Rodriguez u32 flags = 0; 4883f2355cbSLuis R. Rodriguez u32 num_rules = 0, size_of_regd = 0; 4893f2355cbSLuis R. Rodriguez u8 *triplets_start = NULL; 4903f2355cbSLuis R. Rodriguez u8 len_at_triplet = 0; 4913f2355cbSLuis R. Rodriguez /* the last channel we have registered in a subband (triplet) */ 4923f2355cbSLuis R. Rodriguez int last_sub_max_channel = 0; 4933f2355cbSLuis R. Rodriguez 4943f2355cbSLuis R. Rodriguez *checksum = 0xDEADBEEF; 4953f2355cbSLuis R. Rodriguez 4963f2355cbSLuis R. Rodriguez /* Country IE requirements */ 4973f2355cbSLuis R. Rodriguez BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || 4983f2355cbSLuis R. Rodriguez country_ie_len & 0x01); 4993f2355cbSLuis R. Rodriguez 5003f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 5013f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 5023f2355cbSLuis R. Rodriguez 5033f2355cbSLuis R. Rodriguez /* 5043f2355cbSLuis R. Rodriguez * Third octet can be: 5053f2355cbSLuis R. Rodriguez * 'I' - Indoor 5063f2355cbSLuis R. Rodriguez * 'O' - Outdoor 5073f2355cbSLuis R. Rodriguez * 5083f2355cbSLuis R. Rodriguez * anything else we assume is no restrictions 5093f2355cbSLuis R. Rodriguez */ 5103f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 5113f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_OUTDOOR; 5123f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 5133f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_INDOOR; 5143f2355cbSLuis R. Rodriguez 5153f2355cbSLuis R. Rodriguez country_ie += 3; 5163f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5173f2355cbSLuis R. Rodriguez 5183f2355cbSLuis R. Rodriguez triplets_start = country_ie; 5193f2355cbSLuis R. Rodriguez len_at_triplet = country_ie_len; 5203f2355cbSLuis R. Rodriguez 5213f2355cbSLuis R. Rodriguez *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); 5223f2355cbSLuis R. Rodriguez 523fb1fc7adSLuis R. Rodriguez /* 524fb1fc7adSLuis R. Rodriguez * We need to build a reg rule for each triplet, but first we must 5253f2355cbSLuis R. Rodriguez * calculate the number of reg rules we will need. We will need one 526fb1fc7adSLuis R. Rodriguez * for each channel subband 527fb1fc7adSLuis R. Rodriguez */ 5283f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 529615aab4bSLuis R. Rodriguez int end_channel = 0; 5303f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 5313f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 5323f2355cbSLuis R. Rodriguez int cur_sub_max_channel = 0, cur_channel = 0; 5333f2355cbSLuis R. Rodriguez 5343f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 5353f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 5363f2355cbSLuis R. Rodriguez country_ie += 3; 5373f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5383f2355cbSLuis R. Rodriguez continue; 5393f2355cbSLuis R. Rodriguez } 5403f2355cbSLuis R. Rodriguez 541615aab4bSLuis R. Rodriguez /* 2 GHz */ 542615aab4bSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 543615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 544615aab4bSLuis R. Rodriguez triplet->chans.num_channels; 545615aab4bSLuis R. Rodriguez else 546615aab4bSLuis R. Rodriguez /* 547615aab4bSLuis R. Rodriguez * 5 GHz -- For example in country IEs if the first 548615aab4bSLuis R. Rodriguez * channel given is 36 and the number of channels is 4 549615aab4bSLuis R. Rodriguez * then the individual channel numbers defined for the 550615aab4bSLuis R. Rodriguez * 5 GHz PHY by these parameters are: 36, 40, 44, and 48 551615aab4bSLuis R. Rodriguez * and not 36, 37, 38, 39. 552615aab4bSLuis R. Rodriguez * 553615aab4bSLuis R. Rodriguez * See: http://tinyurl.com/11d-clarification 554615aab4bSLuis R. Rodriguez */ 555615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 556615aab4bSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 557615aab4bSLuis R. Rodriguez 5583f2355cbSLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 559615aab4bSLuis R. Rodriguez cur_sub_max_channel = end_channel; 5603f2355cbSLuis R. Rodriguez 5613f2355cbSLuis R. Rodriguez /* Basic sanity check */ 5623f2355cbSLuis R. Rodriguez if (cur_sub_max_channel < cur_channel) 5633f2355cbSLuis R. Rodriguez return NULL; 5643f2355cbSLuis R. Rodriguez 565fb1fc7adSLuis R. Rodriguez /* 566fb1fc7adSLuis R. Rodriguez * Do not allow overlapping channels. Also channels 5673f2355cbSLuis R. Rodriguez * passed in each subband must be monotonically 568fb1fc7adSLuis R. Rodriguez * increasing 569fb1fc7adSLuis R. Rodriguez */ 5703f2355cbSLuis R. Rodriguez if (last_sub_max_channel) { 5713f2355cbSLuis R. Rodriguez if (cur_channel <= last_sub_max_channel) 5723f2355cbSLuis R. Rodriguez return NULL; 5733f2355cbSLuis R. Rodriguez if (cur_sub_max_channel <= last_sub_max_channel) 5743f2355cbSLuis R. Rodriguez return NULL; 5753f2355cbSLuis R. Rodriguez } 5763f2355cbSLuis R. Rodriguez 577fb1fc7adSLuis R. Rodriguez /* 578fb1fc7adSLuis R. Rodriguez * When dot11RegulatoryClassesRequired is supported 5793f2355cbSLuis R. Rodriguez * we can throw ext triplets as part of this soup, 5803f2355cbSLuis R. Rodriguez * for now we don't care when those change as we 581fb1fc7adSLuis R. Rodriguez * don't support them 582fb1fc7adSLuis R. Rodriguez */ 5833f2355cbSLuis R. Rodriguez *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | 5843f2355cbSLuis R. Rodriguez ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | 5853f2355cbSLuis R. Rodriguez ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); 5863f2355cbSLuis R. Rodriguez 5873f2355cbSLuis R. Rodriguez last_sub_max_channel = cur_sub_max_channel; 5883f2355cbSLuis R. Rodriguez 5893f2355cbSLuis R. Rodriguez country_ie += 3; 5903f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5913f2355cbSLuis R. Rodriguez num_rules++; 5923f2355cbSLuis R. Rodriguez 593fb1fc7adSLuis R. Rodriguez /* 594fb1fc7adSLuis R. Rodriguez * Note: this is not a IEEE requirement but 595fb1fc7adSLuis R. Rodriguez * simply a memory requirement 596fb1fc7adSLuis R. Rodriguez */ 5973f2355cbSLuis R. Rodriguez if (num_rules > NL80211_MAX_SUPP_REG_RULES) 5983f2355cbSLuis R. Rodriguez return NULL; 5993f2355cbSLuis R. Rodriguez } 6003f2355cbSLuis R. Rodriguez 6013f2355cbSLuis R. Rodriguez country_ie = triplets_start; 6023f2355cbSLuis R. Rodriguez country_ie_len = len_at_triplet; 6033f2355cbSLuis R. Rodriguez 6043f2355cbSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 6053f2355cbSLuis R. Rodriguez (num_rules * sizeof(struct ieee80211_reg_rule)); 6063f2355cbSLuis R. Rodriguez 6073f2355cbSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 6083f2355cbSLuis R. Rodriguez if (!rd) 6093f2355cbSLuis R. Rodriguez return NULL; 6103f2355cbSLuis R. Rodriguez 6113f2355cbSLuis R. Rodriguez rd->n_reg_rules = num_rules; 6123f2355cbSLuis R. Rodriguez rd->alpha2[0] = alpha2[0]; 6133f2355cbSLuis R. Rodriguez rd->alpha2[1] = alpha2[1]; 6143f2355cbSLuis R. Rodriguez 6153f2355cbSLuis R. Rodriguez /* This time around we fill in the rd */ 6163f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 61702e68a3dSLuis R. Rodriguez int end_channel = 0; 6183f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 6193f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 6203f2355cbSLuis R. Rodriguez struct ieee80211_reg_rule *reg_rule = NULL; 6213f2355cbSLuis R. Rodriguez struct ieee80211_freq_range *freq_range = NULL; 6223f2355cbSLuis R. Rodriguez struct ieee80211_power_rule *power_rule = NULL; 6233f2355cbSLuis R. Rodriguez 624fb1fc7adSLuis R. Rodriguez /* 625fb1fc7adSLuis R. Rodriguez * Must parse if dot11RegulatoryClassesRequired is true, 626fb1fc7adSLuis R. Rodriguez * we don't support this yet 627fb1fc7adSLuis R. Rodriguez */ 6283f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 6293f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 6303f2355cbSLuis R. Rodriguez country_ie += 3; 6313f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6323f2355cbSLuis R. Rodriguez continue; 6333f2355cbSLuis R. Rodriguez } 6343f2355cbSLuis R. Rodriguez 6353f2355cbSLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 6363f2355cbSLuis R. Rodriguez freq_range = ®_rule->freq_range; 6373f2355cbSLuis R. Rodriguez power_rule = ®_rule->power_rule; 6383f2355cbSLuis R. Rodriguez 6393f2355cbSLuis R. Rodriguez reg_rule->flags = flags; 6403f2355cbSLuis R. Rodriguez 64102e68a3dSLuis R. Rodriguez /* 2 GHz */ 64202e68a3dSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 64302e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 64402e68a3dSLuis R. Rodriguez triplet->chans.num_channels; 64502e68a3dSLuis R. Rodriguez else 64602e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 64702e68a3dSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 64802e68a3dSLuis R. Rodriguez 649fb1fc7adSLuis R. Rodriguez /* 650fb1fc7adSLuis R. Rodriguez * The +10 is since the regulatory domain expects 6513f2355cbSLuis R. Rodriguez * the actual band edge, not the center of freq for 6523f2355cbSLuis R. Rodriguez * its start and end freqs, assuming 20 MHz bandwidth on 653fb1fc7adSLuis R. Rodriguez * the channels passed 654fb1fc7adSLuis R. Rodriguez */ 6553f2355cbSLuis R. Rodriguez freq_range->start_freq_khz = 6563f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 6573f2355cbSLuis R. Rodriguez triplet->chans.first_channel) - 10); 6583f2355cbSLuis R. Rodriguez freq_range->end_freq_khz = 6593f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 66002e68a3dSLuis R. Rodriguez end_channel) + 10); 6613f2355cbSLuis R. Rodriguez 662fb1fc7adSLuis R. Rodriguez /* 663fb1fc7adSLuis R. Rodriguez * These are large arbitrary values we use to intersect later. 664fb1fc7adSLuis R. Rodriguez * Increment this if we ever support >= 40 MHz channels 665fb1fc7adSLuis R. Rodriguez * in IEEE 802.11 666fb1fc7adSLuis R. Rodriguez */ 6673f2355cbSLuis R. Rodriguez freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); 6683f2355cbSLuis R. Rodriguez power_rule->max_antenna_gain = DBI_TO_MBI(100); 6693f2355cbSLuis R. Rodriguez power_rule->max_eirp = DBM_TO_MBM(100); 6703f2355cbSLuis R. Rodriguez 6713f2355cbSLuis R. Rodriguez country_ie += 3; 6723f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6733f2355cbSLuis R. Rodriguez i++; 6743f2355cbSLuis R. Rodriguez 6753f2355cbSLuis R. Rodriguez BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); 6763f2355cbSLuis R. Rodriguez } 6773f2355cbSLuis R. Rodriguez 6783f2355cbSLuis R. Rodriguez return rd; 6793f2355cbSLuis R. Rodriguez } 6803f2355cbSLuis R. Rodriguez 6813f2355cbSLuis R. Rodriguez 682fb1fc7adSLuis R. Rodriguez /* 683fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 684fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 685fb1fc7adSLuis R. Rodriguez */ 6869c96477dSLuis R. Rodriguez static int reg_rules_intersect( 6879c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 6889c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 6899c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 6909c96477dSLuis R. Rodriguez { 6919c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 6929c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 6939c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 6949c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 6959c96477dSLuis R. Rodriguez u32 freq_diff; 6969c96477dSLuis R. Rodriguez 6979c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 6989c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 6999c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 7009c96477dSLuis R. Rodriguez 7019c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 7029c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 7039c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 7049c96477dSLuis R. Rodriguez 7059c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 7069c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 7079c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 7089c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 7099c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 7109c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 7119c96477dSLuis R. Rodriguez 7129c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 7139c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 7149c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 7159c96477dSLuis R. Rodriguez 7169c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 7179c96477dSLuis R. Rodriguez power_rule2->max_eirp); 7189c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 7199c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 7209c96477dSLuis R. Rodriguez 7219c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 7229c96477dSLuis R. Rodriguez 7239c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 7249c96477dSLuis R. Rodriguez return -EINVAL; 7259c96477dSLuis R. Rodriguez 7269c96477dSLuis R. Rodriguez return 0; 7279c96477dSLuis R. Rodriguez } 7289c96477dSLuis R. Rodriguez 7299c96477dSLuis R. Rodriguez /** 7309c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 7319c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 7329c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 7339c96477dSLuis R. Rodriguez * 7349c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 7359c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 7369c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 7379c96477dSLuis R. Rodriguez * 7389c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 7399c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 7409c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 7419c96477dSLuis R. Rodriguez */ 7429c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 7439c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 7449c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 7459c96477dSLuis R. Rodriguez { 7469c96477dSLuis R. Rodriguez int r, size_of_regd; 7479c96477dSLuis R. Rodriguez unsigned int x, y; 7489c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 7499c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 7509c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 7519c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 7529c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 7539c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 7549c96477dSLuis R. Rodriguez 7559c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 7569c96477dSLuis R. Rodriguez intersected_rule = &irule; 7579c96477dSLuis R. Rodriguez 7589c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 7599c96477dSLuis R. Rodriguez 7609c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 7619c96477dSLuis R. Rodriguez return NULL; 7629c96477dSLuis R. Rodriguez 763fb1fc7adSLuis R. Rodriguez /* 764fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 7659c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 7669c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 7679c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 768fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 769fb1fc7adSLuis R. Rodriguez */ 7709c96477dSLuis R. Rodriguez 7719c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7729c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7739c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7749c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 7759c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 7769c96477dSLuis R. Rodriguez intersected_rule)) 7779c96477dSLuis R. Rodriguez num_rules++; 7789c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 7799c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 7809c96477dSLuis R. Rodriguez } 7819c96477dSLuis R. Rodriguez } 7829c96477dSLuis R. Rodriguez 7839c96477dSLuis R. Rodriguez if (!num_rules) 7849c96477dSLuis R. Rodriguez return NULL; 7859c96477dSLuis R. Rodriguez 7869c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 7879c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 7889c96477dSLuis R. Rodriguez 7899c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 7909c96477dSLuis R. Rodriguez if (!rd) 7919c96477dSLuis R. Rodriguez return NULL; 7929c96477dSLuis R. Rodriguez 7939c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7949c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7959c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7969c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 797fb1fc7adSLuis R. Rodriguez /* 798fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 7999c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 800fb1fc7adSLuis R. Rodriguez * a memcpy() 801fb1fc7adSLuis R. Rodriguez */ 8029c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 8039c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 8049c96477dSLuis R. Rodriguez intersected_rule); 805fb1fc7adSLuis R. Rodriguez /* 806fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 807fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 808fb1fc7adSLuis R. Rodriguez */ 8099c96477dSLuis R. Rodriguez if (r) 8109c96477dSLuis R. Rodriguez continue; 8119c96477dSLuis R. Rodriguez rule_idx++; 8129c96477dSLuis R. Rodriguez } 8139c96477dSLuis R. Rodriguez } 8149c96477dSLuis R. Rodriguez 8159c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 8169c96477dSLuis R. Rodriguez kfree(rd); 8179c96477dSLuis R. Rodriguez return NULL; 8189c96477dSLuis R. Rodriguez } 8199c96477dSLuis R. Rodriguez 8209c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 8219c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 8229c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 8239c96477dSLuis R. Rodriguez 8249c96477dSLuis R. Rodriguez return rd; 8259c96477dSLuis R. Rodriguez } 8269c96477dSLuis R. Rodriguez 827fb1fc7adSLuis R. Rodriguez /* 828fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 829fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 830fb1fc7adSLuis R. Rodriguez */ 831b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 832b2e1b302SLuis R. Rodriguez { 833b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 834b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 835b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 836b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 837b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 838b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 839b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 840b2e1b302SLuis R. Rodriguez return channel_flags; 841b2e1b302SLuis R. Rodriguez } 842b2e1b302SLuis R. Rodriguez 8431fa25e41SLuis R. Rodriguez static int freq_reg_info_regd(struct wiphy *wiphy, 8441fa25e41SLuis R. Rodriguez u32 center_freq, 8451fa25e41SLuis R. Rodriguez u32 *bandwidth, 8461fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 8471fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *custom_regd) 8488318d78aSJohannes Berg { 8498318d78aSJohannes Berg int i; 8500c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 8513e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *regd; 852b2e1b302SLuis R. Rodriguez u32 max_bandwidth = 0; 8538318d78aSJohannes Berg 8541fa25e41SLuis R. Rodriguez regd = custom_regd ? custom_regd : cfg80211_regdomain; 8553e0c3ff3SLuis R. Rodriguez 856fb1fc7adSLuis R. Rodriguez /* 857fb1fc7adSLuis R. Rodriguez * Follow the driver's regulatory domain, if present, unless a country 858fb1fc7adSLuis R. Rodriguez * IE has been processed or a user wants to help complaince further 859fb1fc7adSLuis R. Rodriguez */ 8603e0c3ff3SLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE && 86124ed1da1SLuis R. Rodriguez last_request->initiator != REGDOM_SET_BY_USER && 8623e0c3ff3SLuis R. Rodriguez wiphy->regd) 8633e0c3ff3SLuis R. Rodriguez regd = wiphy->regd; 8643e0c3ff3SLuis R. Rodriguez 8653e0c3ff3SLuis R. Rodriguez if (!regd) 866b2e1b302SLuis R. Rodriguez return -EINVAL; 867b2e1b302SLuis R. Rodriguez 8683e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 869b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 870b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 871b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 872b2e1b302SLuis R. Rodriguez 8733e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 874b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 875b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 8760c7dc45dSLuis R. Rodriguez 877fb1fc7adSLuis R. Rodriguez /* 878fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 8790c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 880fb1fc7adSLuis R. Rodriguez * not overwrite it once found 881fb1fc7adSLuis R. Rodriguez */ 8820c7dc45dSLuis R. Rodriguez if (!band_rule_found) 8830c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 8840c7dc45dSLuis R. Rodriguez 885b2e1b302SLuis R. Rodriguez max_bandwidth = freq_max_bandwidth(fr, center_freq); 8860c7dc45dSLuis R. Rodriguez 887b2e1b302SLuis R. Rodriguez if (max_bandwidth && *bandwidth <= max_bandwidth) { 888b2e1b302SLuis R. Rodriguez *reg_rule = rr; 889b2e1b302SLuis R. Rodriguez *bandwidth = max_bandwidth; 8908318d78aSJohannes Berg break; 8918318d78aSJohannes Berg } 8928318d78aSJohannes Berg } 8938318d78aSJohannes Berg 8940c7dc45dSLuis R. Rodriguez if (!band_rule_found) 8950c7dc45dSLuis R. Rodriguez return -ERANGE; 8960c7dc45dSLuis R. Rodriguez 897b2e1b302SLuis R. Rodriguez return !max_bandwidth; 898b2e1b302SLuis R. Rodriguez } 89934f57347SLuis R. Rodriguez EXPORT_SYMBOL(freq_reg_info); 900b2e1b302SLuis R. Rodriguez 90134f57347SLuis R. Rodriguez int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth, 9021fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 9031fa25e41SLuis R. Rodriguez { 9041fa25e41SLuis R. Rodriguez return freq_reg_info_regd(wiphy, center_freq, 9051fa25e41SLuis R. Rodriguez bandwidth, reg_rule, NULL); 9061fa25e41SLuis R. Rodriguez } 907b2e1b302SLuis R. Rodriguez 908a92a3ce7SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, 909a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 910b2e1b302SLuis R. Rodriguez { 911b2e1b302SLuis R. Rodriguez int r; 912a92a3ce7SLuis R. Rodriguez u32 flags; 913b2e1b302SLuis R. Rodriguez u32 max_bandwidth = 0; 914b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 915b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 916a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 917a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 918fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 919a92a3ce7SLuis R. Rodriguez 920761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 921761cf7ecSLuis R. Rodriguez 922806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 923806a9e39SLuis R. Rodriguez 924a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 925a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 926a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 927a92a3ce7SLuis R. Rodriguez 928a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 929b2e1b302SLuis R. Rodriguez 9303e0c3ff3SLuis R. Rodriguez r = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq), 931b2e1b302SLuis R. Rodriguez &max_bandwidth, ®_rule); 932b2e1b302SLuis R. Rodriguez 933b2e1b302SLuis R. Rodriguez if (r) { 934fb1fc7adSLuis R. Rodriguez /* 935fb1fc7adSLuis R. Rodriguez * This means no regulatory rule was found in the country IE 9360c7dc45dSLuis R. Rodriguez * with a frequency range on the center_freq's band, since 9370c7dc45dSLuis R. Rodriguez * IEEE-802.11 allows for a country IE to have a subset of the 9380c7dc45dSLuis R. Rodriguez * regulatory information provided in a country we ignore 9390c7dc45dSLuis R. Rodriguez * disabling the channel unless at least one reg rule was 9400c7dc45dSLuis R. Rodriguez * found on the center_freq's band. For details see this 9410c7dc45dSLuis R. Rodriguez * clarification: 9420c7dc45dSLuis R. Rodriguez * 9430c7dc45dSLuis R. Rodriguez * http://tinyurl.com/11d-clarification 9440c7dc45dSLuis R. Rodriguez */ 9450c7dc45dSLuis R. Rodriguez if (r == -ERANGE && 9460c7dc45dSLuis R. Rodriguez last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { 9470c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 9480c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Leaving channel %d MHz " 9490c7dc45dSLuis R. Rodriguez "intact on %s - no rule found in band on " 9500c7dc45dSLuis R. Rodriguez "Country IE\n", 9510c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 9520c7dc45dSLuis R. Rodriguez #endif 9530c7dc45dSLuis R. Rodriguez } else { 954fb1fc7adSLuis R. Rodriguez /* 955fb1fc7adSLuis R. Rodriguez * In this case we know the country IE has at least one reg rule 956fb1fc7adSLuis R. Rodriguez * for the band so we respect its band definitions 957fb1fc7adSLuis R. Rodriguez */ 9580c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 9590c7dc45dSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) 9600c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Disabling " 9610c7dc45dSLuis R. Rodriguez "channel %d MHz on %s due to " 9620c7dc45dSLuis R. Rodriguez "Country IE\n", 9630c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 9640c7dc45dSLuis R. Rodriguez #endif 9658318d78aSJohannes Berg flags |= IEEE80211_CHAN_DISABLED; 9668318d78aSJohannes Berg chan->flags = flags; 9670c7dc45dSLuis R. Rodriguez } 9688318d78aSJohannes Berg return; 9698318d78aSJohannes Berg } 9708318d78aSJohannes Berg 971b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 972b2e1b302SLuis R. Rodriguez 973f976376dSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_DRIVER && 974806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 975806a9e39SLuis R. Rodriguez request_wiphy->strict_regulatory) { 976fb1fc7adSLuis R. Rodriguez /* 977fb1fc7adSLuis R. Rodriguez * This gaurantees the driver's requested regulatory domain 978f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 979fb1fc7adSLuis R. Rodriguez * settings 980fb1fc7adSLuis R. Rodriguez */ 981f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 982f976376dSLuis R. Rodriguez map_regdom_flags(reg_rule->flags); 983f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 984f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 985f976376dSLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); 986f976376dSLuis R. Rodriguez chan->max_power = chan->orig_mpwr = 987f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 988f976376dSLuis R. Rodriguez return; 989f976376dSLuis R. Rodriguez } 990f976376dSLuis R. Rodriguez 991b2e1b302SLuis R. Rodriguez chan->flags = flags | map_regdom_flags(reg_rule->flags); 9928318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 993b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 994b2e1b302SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); 995253898c4SJohn W. Linville if (chan->orig_mpwr) 996b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 997b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 998253898c4SJohn W. Linville else 999b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 10008318d78aSJohannes Berg } 10018318d78aSJohannes Berg 1002a92a3ce7SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) 10038318d78aSJohannes Berg { 1004a92a3ce7SLuis R. Rodriguez unsigned int i; 1005a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1006a92a3ce7SLuis R. Rodriguez 1007a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1008a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 10098318d78aSJohannes Berg 10108318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 1011a92a3ce7SLuis R. Rodriguez handle_channel(wiphy, band, i); 10128318d78aSJohannes Berg } 10138318d78aSJohannes Berg 101414b9815aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, enum reg_set_by setby) 101514b9815aSLuis R. Rodriguez { 101614b9815aSLuis R. Rodriguez if (!last_request) 101714b9815aSLuis R. Rodriguez return true; 101814b9815aSLuis R. Rodriguez if (setby == REGDOM_SET_BY_CORE && 10192a44f911SLuis R. Rodriguez wiphy->custom_regulatory) 102014b9815aSLuis R. Rodriguez return true; 1021fb1fc7adSLuis R. Rodriguez /* 1022fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1023fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1024fb1fc7adSLuis R. Rodriguez */ 1025f976376dSLuis R. Rodriguez if (wiphy->strict_regulatory && !wiphy->regd && 1026f976376dSLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) 102714b9815aSLuis R. Rodriguez return true; 102814b9815aSLuis R. Rodriguez return false; 102914b9815aSLuis R. Rodriguez } 103014b9815aSLuis R. Rodriguez 1031b2e1b302SLuis R. Rodriguez static void update_all_wiphy_regulatory(enum reg_set_by setby) 1032b2e1b302SLuis R. Rodriguez { 1033b2e1b302SLuis R. Rodriguez struct cfg80211_registered_device *drv; 1034b2e1b302SLuis R. Rodriguez 1035b2e1b302SLuis R. Rodriguez list_for_each_entry(drv, &cfg80211_drv_list, list) 1036b2e1b302SLuis R. Rodriguez wiphy_update_regulatory(&drv->wiphy, setby); 1037b2e1b302SLuis R. Rodriguez } 1038b2e1b302SLuis R. Rodriguez 1039e38f8a7aSLuis R. Rodriguez static void handle_reg_beacon(struct wiphy *wiphy, 1040e38f8a7aSLuis R. Rodriguez unsigned int chan_idx, 1041e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1042e38f8a7aSLuis R. Rodriguez { 1043e38f8a7aSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 1044e38f8a7aSLuis R. Rodriguez #define REG_DEBUG_BEACON_FLAG(desc) \ 1045e38f8a7aSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Enabling " desc " on " \ 1046e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", \ 1047e38f8a7aSLuis R. Rodriguez reg_beacon->chan.center_freq, \ 1048e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(reg_beacon->chan.center_freq), \ 1049e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 1050e38f8a7aSLuis R. Rodriguez #else 1051e38f8a7aSLuis R. Rodriguez #define REG_DEBUG_BEACON_FLAG(desc) do {} while (0) 1052e38f8a7aSLuis R. Rodriguez #endif 1053e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1054e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 1055e38f8a7aSLuis R. Rodriguez 1056e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1057e38f8a7aSLuis R. Rodriguez 1058e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1059e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1060e38f8a7aSLuis R. Rodriguez 1061e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1062e38f8a7aSLuis R. Rodriguez return; 1063e38f8a7aSLuis R. Rodriguez 1064e38f8a7aSLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { 1065e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 1066e38f8a7aSLuis R. Rodriguez REG_DEBUG_BEACON_FLAG("active scanning"); 1067e38f8a7aSLuis R. Rodriguez } 1068e38f8a7aSLuis R. Rodriguez 1069e38f8a7aSLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IBSS) { 1070e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 1071e38f8a7aSLuis R. Rodriguez REG_DEBUG_BEACON_FLAG("beaconing"); 1072e38f8a7aSLuis R. Rodriguez } 1073e38f8a7aSLuis R. Rodriguez 1074e38f8a7aSLuis R. Rodriguez chan->beacon_found = true; 1075e38f8a7aSLuis R. Rodriguez #undef REG_DEBUG_BEACON_FLAG 1076e38f8a7aSLuis R. Rodriguez } 1077e38f8a7aSLuis R. Rodriguez 1078e38f8a7aSLuis R. Rodriguez /* 1079e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1080e38f8a7aSLuis R. Rodriguez * new channel 1081e38f8a7aSLuis R. Rodriguez */ 1082e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1083e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1084e38f8a7aSLuis R. Rodriguez { 1085e38f8a7aSLuis R. Rodriguez unsigned int i; 1086e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1087e38f8a7aSLuis R. Rodriguez 1088e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1089e38f8a7aSLuis R. Rodriguez 1090e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1091e38f8a7aSLuis R. Rodriguez return; 1092e38f8a7aSLuis R. Rodriguez 1093e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1094e38f8a7aSLuis R. Rodriguez 1095e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1096e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1097e38f8a7aSLuis R. Rodriguez } 1098e38f8a7aSLuis R. Rodriguez 1099e38f8a7aSLuis R. Rodriguez /* 1100e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1101e38f8a7aSLuis R. Rodriguez */ 1102e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1103e38f8a7aSLuis R. Rodriguez { 1104e38f8a7aSLuis R. Rodriguez unsigned int i; 1105e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1106e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1107e38f8a7aSLuis R. Rodriguez 1108e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1109e38f8a7aSLuis R. Rodriguez 1110e38f8a7aSLuis R. Rodriguez if (list_empty(®_beacon_list)) 1111e38f8a7aSLuis R. Rodriguez return; 1112e38f8a7aSLuis R. Rodriguez 1113e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1114e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1115e38f8a7aSLuis R. Rodriguez continue; 1116e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1117e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1118e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1119e38f8a7aSLuis R. Rodriguez } 1120e38f8a7aSLuis R. Rodriguez } 1121e38f8a7aSLuis R. Rodriguez 1122e38f8a7aSLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 1123e38f8a7aSLuis R. Rodriguez { 1124e38f8a7aSLuis R. Rodriguez if (is_world_regdom(cfg80211_regdomain->alpha2) || 1125e38f8a7aSLuis R. Rodriguez (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) 1126e38f8a7aSLuis R. Rodriguez return true; 1127e38f8a7aSLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE && 1128e38f8a7aSLuis R. Rodriguez wiphy->custom_regulatory) 1129e38f8a7aSLuis R. Rodriguez return true; 1130e38f8a7aSLuis R. Rodriguez return false; 1131e38f8a7aSLuis R. Rodriguez } 1132e38f8a7aSLuis R. Rodriguez 1133e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1134e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1135e38f8a7aSLuis R. Rodriguez { 1136e38f8a7aSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 1137e38f8a7aSLuis R. Rodriguez return; 1138e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1139e38f8a7aSLuis R. Rodriguez } 1140e38f8a7aSLuis R. Rodriguez 1141b2e1b302SLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby) 11428318d78aSJohannes Berg { 11438318d78aSJohannes Berg enum ieee80211_band band; 1144d46e5b1dSLuis R. Rodriguez 1145d46e5b1dSLuis R. Rodriguez if (ignore_reg_update(wiphy, setby)) 1146e38f8a7aSLuis R. Rodriguez goto out; 1147b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 11488318d78aSJohannes Berg if (wiphy->bands[band]) 1149a92a3ce7SLuis R. Rodriguez handle_band(wiphy, band); 1150b2e1b302SLuis R. Rodriguez } 1151e38f8a7aSLuis R. Rodriguez out: 1152e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1153b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1154716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 1155b2e1b302SLuis R. Rodriguez } 1156b2e1b302SLuis R. Rodriguez 11571fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 11581fa25e41SLuis R. Rodriguez enum ieee80211_band band, 11591fa25e41SLuis R. Rodriguez unsigned int chan_idx, 11601fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 11611fa25e41SLuis R. Rodriguez { 11621fa25e41SLuis R. Rodriguez int r; 11631fa25e41SLuis R. Rodriguez u32 max_bandwidth = 0; 11641fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 11651fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 11661fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 11671fa25e41SLuis R. Rodriguez struct ieee80211_channel *chan; 11681fa25e41SLuis R. Rodriguez 11691fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 11701fa25e41SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 11711fa25e41SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 11721fa25e41SLuis R. Rodriguez 11731fa25e41SLuis R. Rodriguez r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), 11741fa25e41SLuis R. Rodriguez &max_bandwidth, ®_rule, regd); 11751fa25e41SLuis R. Rodriguez 11761fa25e41SLuis R. Rodriguez if (r) { 11771fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 11781fa25e41SLuis R. Rodriguez return; 11791fa25e41SLuis R. Rodriguez } 11801fa25e41SLuis R. Rodriguez 11811fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 11821fa25e41SLuis R. Rodriguez 11831fa25e41SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags); 11841fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 11851fa25e41SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); 11861fa25e41SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 11871fa25e41SLuis R. Rodriguez } 11881fa25e41SLuis R. Rodriguez 11891fa25e41SLuis R. Rodriguez static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, 11901fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 11911fa25e41SLuis R. Rodriguez { 11921fa25e41SLuis R. Rodriguez unsigned int i; 11931fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 11941fa25e41SLuis R. Rodriguez 11951fa25e41SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 11961fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 11971fa25e41SLuis R. Rodriguez 11981fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 11991fa25e41SLuis R. Rodriguez handle_channel_custom(wiphy, band, i, regd); 12001fa25e41SLuis R. Rodriguez } 12011fa25e41SLuis R. Rodriguez 12021fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 12031fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 12041fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12051fa25e41SLuis R. Rodriguez { 12061fa25e41SLuis R. Rodriguez enum ieee80211_band band; 12071fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 12081fa25e41SLuis R. Rodriguez if (wiphy->bands[band]) 12091fa25e41SLuis R. Rodriguez handle_band_custom(wiphy, band, regd); 12101fa25e41SLuis R. Rodriguez } 12111fa25e41SLuis R. Rodriguez } 12121fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 12131fa25e41SLuis R. Rodriguez 12143e0c3ff3SLuis R. Rodriguez static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, 12153e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *src_regd) 12163e0c3ff3SLuis R. Rodriguez { 12173e0c3ff3SLuis R. Rodriguez struct ieee80211_regdomain *regd; 12183e0c3ff3SLuis R. Rodriguez int size_of_regd = 0; 12193e0c3ff3SLuis R. Rodriguez unsigned int i; 12203e0c3ff3SLuis R. Rodriguez 12213e0c3ff3SLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 12223e0c3ff3SLuis R. Rodriguez ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); 12233e0c3ff3SLuis R. Rodriguez 12243e0c3ff3SLuis R. Rodriguez regd = kzalloc(size_of_regd, GFP_KERNEL); 12253e0c3ff3SLuis R. Rodriguez if (!regd) 12263e0c3ff3SLuis R. Rodriguez return -ENOMEM; 12273e0c3ff3SLuis R. Rodriguez 12283e0c3ff3SLuis R. Rodriguez memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 12293e0c3ff3SLuis R. Rodriguez 12303e0c3ff3SLuis R. Rodriguez for (i = 0; i < src_regd->n_reg_rules; i++) 12313e0c3ff3SLuis R. Rodriguez memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 12323e0c3ff3SLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 12333e0c3ff3SLuis R. Rodriguez 12343e0c3ff3SLuis R. Rodriguez *dst_regd = regd; 12353e0c3ff3SLuis R. Rodriguez return 0; 1236b2e1b302SLuis R. Rodriguez } 1237b2e1b302SLuis R. Rodriguez 1238fb1fc7adSLuis R. Rodriguez /* 1239fb1fc7adSLuis R. Rodriguez * Return value which can be used by ignore_request() to indicate 1240fb1fc7adSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains 1241fb1fc7adSLuis R. Rodriguez */ 12429c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 12439c96477dSLuis R. Rodriguez 124484fa4f43SJohannes Berg /* This has the logic which determines when a new request 124584fa4f43SJohannes Berg * should be ignored. */ 12462f92cd2eSLuis R. Rodriguez static int ignore_request(struct wiphy *wiphy, 12472f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 124884fa4f43SJohannes Berg { 1249806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1250761cf7ecSLuis R. Rodriguez 1251761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1252761cf7ecSLuis R. Rodriguez 125384fa4f43SJohannes Berg /* All initial requests are respected */ 125484fa4f43SJohannes Berg if (!last_request) 125584fa4f43SJohannes Berg return 0; 125684fa4f43SJohannes Berg 12572f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 125884fa4f43SJohannes Berg case REGDOM_SET_BY_INIT: 125984fa4f43SJohannes Berg return -EINVAL; 126084fa4f43SJohannes Berg case REGDOM_SET_BY_CORE: 1261ba25c141SLuis R. Rodriguez return -EINVAL; 126284fa4f43SJohannes Berg case REGDOM_SET_BY_COUNTRY_IE: 1263806a9e39SLuis R. Rodriguez 1264806a9e39SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1265806a9e39SLuis R. Rodriguez 12662f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 126784fa4f43SJohannes Berg return -EINVAL; 126884fa4f43SJohannes Berg if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { 1269806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 127084fa4f43SJohannes Berg /* 127184fa4f43SJohannes Berg * Two cards with two APs claiming different 127284fa4f43SJohannes Berg * different Country IE alpha2s. We could 127384fa4f43SJohannes Berg * intersect them, but that seems unlikely 127484fa4f43SJohannes Berg * to be correct. Reject second one for now. 127584fa4f43SJohannes Berg */ 12762f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 127784fa4f43SJohannes Berg return -EOPNOTSUPP; 127884fa4f43SJohannes Berg return -EALREADY; 127984fa4f43SJohannes Berg } 1280fb1fc7adSLuis R. Rodriguez /* 1281fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1282fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1283fb1fc7adSLuis R. Rodriguez */ 12842f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 128584fa4f43SJohannes Berg return 0; 128684fa4f43SJohannes Berg return -EALREADY; 128784fa4f43SJohannes Berg } 12883f2355cbSLuis R. Rodriguez return REG_INTERSECT; 128984fa4f43SJohannes Berg case REGDOM_SET_BY_DRIVER: 1290e74b1e7fSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_CORE) { 1291e74b1e7fSLuis R. Rodriguez if (is_old_static_regdom(cfg80211_regdomain)) 129284fa4f43SJohannes Berg return 0; 12932f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 1294e74b1e7fSLuis R. Rodriguez return 0; 1295e74b1e7fSLuis R. Rodriguez return -EALREADY; 1296e74b1e7fSLuis R. Rodriguez } 1297fff32c04SLuis R. Rodriguez 1298fff32c04SLuis R. Rodriguez /* 1299fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1300fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1301fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1302fff32c04SLuis R. Rodriguez */ 1303fff32c04SLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_DRIVER && 13042f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1305fff32c04SLuis R. Rodriguez return -EALREADY; 1306fff32c04SLuis R. Rodriguez 13073e0c3ff3SLuis R. Rodriguez return REG_INTERSECT; 130884fa4f43SJohannes Berg case REGDOM_SET_BY_USER: 130984fa4f43SJohannes Berg if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) 13109c96477dSLuis R. Rodriguez return REG_INTERSECT; 1311fb1fc7adSLuis R. Rodriguez /* 1312fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1313fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1314fb1fc7adSLuis R. Rodriguez */ 13153f2355cbSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_USER && 13163f2355cbSLuis R. Rodriguez last_request->intersect) 13173f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 1318fb1fc7adSLuis R. Rodriguez /* 1319fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1320fb1fc7adSLuis R. Rodriguez * requests have been processed 1321fb1fc7adSLuis R. Rodriguez */ 13225eebade6SLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_CORE || 13235eebade6SLuis R. Rodriguez last_request->initiator == REGDOM_SET_BY_DRIVER || 13245eebade6SLuis R. Rodriguez last_request->initiator == REGDOM_SET_BY_USER) { 132569b1572bSLuis R. Rodriguez if (regdom_changes(last_request->alpha2)) 13265eebade6SLuis R. Rodriguez return -EAGAIN; 13275eebade6SLuis R. Rodriguez } 13285eebade6SLuis R. Rodriguez 1329e74b1e7fSLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 13302f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1331e74b1e7fSLuis R. Rodriguez return -EALREADY; 1332e74b1e7fSLuis R. Rodriguez 133384fa4f43SJohannes Berg return 0; 133484fa4f43SJohannes Berg } 133584fa4f43SJohannes Berg 133684fa4f43SJohannes Berg return -EINVAL; 133784fa4f43SJohannes Berg } 133884fa4f43SJohannes Berg 1339d1c96a9aSLuis R. Rodriguez /** 1340d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1341d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1342d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 134328da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1344d1c96a9aSLuis R. Rodriguez * 1345d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 134628da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1347d1c96a9aSLuis R. Rodriguez * 1348d1c96a9aSLuis R. Rodriguez * Returns zero if all went fine, %-EALREADY if a regulatory domain had 1349d1c96a9aSLuis R. Rodriguez * already been set or other standard error codes. 1350d1c96a9aSLuis R. Rodriguez * 1351d1c96a9aSLuis R. Rodriguez * Caller must hold &cfg80211_mutex 1352d1c96a9aSLuis R. Rodriguez */ 135328da32d7SLuis R. Rodriguez static int __regulatory_hint(struct wiphy *wiphy, 135428da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1355b2e1b302SLuis R. Rodriguez { 13569c96477dSLuis R. Rodriguez bool intersect = false; 1357b2e1b302SLuis R. Rodriguez int r = 0; 1358b2e1b302SLuis R. Rodriguez 1359761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1360761cf7ecSLuis R. Rodriguez 13612f92cd2eSLuis R. Rodriguez r = ignore_request(wiphy, pending_request); 13629c96477dSLuis R. Rodriguez 13633e0c3ff3SLuis R. Rodriguez if (r == REG_INTERSECT) { 136428da32d7SLuis R. Rodriguez if (pending_request->initiator == REGDOM_SET_BY_DRIVER) { 13653e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1366d951c1ddSLuis R. Rodriguez if (r) { 1367d951c1ddSLuis R. Rodriguez kfree(pending_request); 1368b2e1b302SLuis R. Rodriguez return r; 13693e0c3ff3SLuis R. Rodriguez } 1370d951c1ddSLuis R. Rodriguez } 13713e0c3ff3SLuis R. Rodriguez intersect = true; 13723e0c3ff3SLuis R. Rodriguez } else if (r) { 1373fb1fc7adSLuis R. Rodriguez /* 1374fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 13753e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1376fb1fc7adSLuis R. Rodriguez * wiphy 1377fb1fc7adSLuis R. Rodriguez */ 137828da32d7SLuis R. Rodriguez if (r == -EALREADY && 137928da32d7SLuis R. Rodriguez pending_request->initiator == REGDOM_SET_BY_DRIVER) { 13803e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1381d951c1ddSLuis R. Rodriguez if (r) { 1382d951c1ddSLuis R. Rodriguez kfree(pending_request); 13833e0c3ff3SLuis R. Rodriguez return r; 1384d951c1ddSLuis R. Rodriguez } 13853e0c3ff3SLuis R. Rodriguez r = -EALREADY; 13863e0c3ff3SLuis R. Rodriguez goto new_request; 13873e0c3ff3SLuis R. Rodriguez } 1388d951c1ddSLuis R. Rodriguez kfree(pending_request); 13893e0c3ff3SLuis R. Rodriguez return r; 13903e0c3ff3SLuis R. Rodriguez } 1391b2e1b302SLuis R. Rodriguez 13923e0c3ff3SLuis R. Rodriguez new_request: 1393f6037d09SJohannes Berg kfree(last_request); 1394d951c1ddSLuis R. Rodriguez 1395d951c1ddSLuis R. Rodriguez last_request = pending_request; 1396d951c1ddSLuis R. Rodriguez last_request->intersect = intersect; 1397d951c1ddSLuis R. Rodriguez 1398d951c1ddSLuis R. Rodriguez pending_request = NULL; 13993e0c3ff3SLuis R. Rodriguez 14003e0c3ff3SLuis R. Rodriguez /* When r == REG_INTERSECT we do need to call CRDA */ 14013e0c3ff3SLuis R. Rodriguez if (r < 0) 14023e0c3ff3SLuis R. Rodriguez return r; 14033e0c3ff3SLuis R. Rodriguez 14043f2355cbSLuis R. Rodriguez /* 14053f2355cbSLuis R. Rodriguez * Note: When CONFIG_WIRELESS_OLD_REGULATORY is enabled 14063f2355cbSLuis R. Rodriguez * AND if CRDA is NOT present nothing will happen, if someone 14073f2355cbSLuis R. Rodriguez * wants to bother with 11d with OLD_REG you can add a timer. 14083f2355cbSLuis R. Rodriguez * If after x amount of time nothing happens you can call: 14093f2355cbSLuis R. Rodriguez * 14103f2355cbSLuis R. Rodriguez * return set_regdom(country_ie_regdomain); 14113f2355cbSLuis R. Rodriguez * 14123f2355cbSLuis R. Rodriguez * to intersect with the static rd 14133f2355cbSLuis R. Rodriguez */ 1414d951c1ddSLuis R. Rodriguez return call_crda(last_request->alpha2); 1415b2e1b302SLuis R. Rodriguez } 1416b2e1b302SLuis R. Rodriguez 1417fe33eb39SLuis R. Rodriguez /* This currently only processes user and driver regulatory hints */ 1418d951c1ddSLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 1419fe33eb39SLuis R. Rodriguez { 1420fe33eb39SLuis R. Rodriguez int r = 0; 1421fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1422fe33eb39SLuis R. Rodriguez 1423fe33eb39SLuis R. Rodriguez BUG_ON(!reg_request->alpha2); 1424fe33eb39SLuis R. Rodriguez 1425fe33eb39SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1426fe33eb39SLuis R. Rodriguez 1427fe33eb39SLuis R. Rodriguez if (wiphy_idx_valid(reg_request->wiphy_idx)) 1428fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1429fe33eb39SLuis R. Rodriguez 1430fe33eb39SLuis R. Rodriguez if (reg_request->initiator == REGDOM_SET_BY_DRIVER && 1431fe33eb39SLuis R. Rodriguez !wiphy) { 1432d951c1ddSLuis R. Rodriguez kfree(reg_request); 1433fe33eb39SLuis R. Rodriguez goto out; 1434fe33eb39SLuis R. Rodriguez } 1435fe33eb39SLuis R. Rodriguez 143628da32d7SLuis R. Rodriguez r = __regulatory_hint(wiphy, reg_request); 1437fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 1438fe33eb39SLuis R. Rodriguez if (r == -EALREADY && wiphy && wiphy->strict_regulatory) 1439fe33eb39SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 1440fe33eb39SLuis R. Rodriguez out: 1441fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1442fe33eb39SLuis R. Rodriguez } 1443fe33eb39SLuis R. Rodriguez 1444e38f8a7aSLuis R. Rodriguez /* Processes regulatory hints, this is all the REGDOM_SET_BY_* */ 1445fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1446fe33eb39SLuis R. Rodriguez { 1447fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request; 1448fe33eb39SLuis R. Rodriguez 1449fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1450fe33eb39SLuis R. Rodriguez while (!list_empty(®_requests_list)) { 1451fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1452fe33eb39SLuis R. Rodriguez struct regulatory_request, 1453fe33eb39SLuis R. Rodriguez list); 1454fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1455fe33eb39SLuis R. Rodriguez 1456d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1457d951c1ddSLuis R. Rodriguez reg_process_hint(reg_request); 1458fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1459fe33eb39SLuis R. Rodriguez } 1460fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1461fe33eb39SLuis R. Rodriguez } 1462fe33eb39SLuis R. Rodriguez 1463e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1464e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1465e38f8a7aSLuis R. Rodriguez { 1466e38f8a7aSLuis R. Rodriguez struct cfg80211_registered_device *drv; 1467e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1468e38f8a7aSLuis R. Rodriguez 1469e38f8a7aSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1470e38f8a7aSLuis R. Rodriguez 1471e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1472e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1473e38f8a7aSLuis R. Rodriguez 1474e38f8a7aSLuis R. Rodriguez if (list_empty(®_pending_beacons)) { 1475e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1476e38f8a7aSLuis R. Rodriguez goto out; 1477e38f8a7aSLuis R. Rodriguez } 1478e38f8a7aSLuis R. Rodriguez 1479e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1480e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1481e38f8a7aSLuis R. Rodriguez 1482e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1483e38f8a7aSLuis R. Rodriguez 1484e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 1485e38f8a7aSLuis R. Rodriguez list_for_each_entry(drv, &cfg80211_drv_list, list) 1486e38f8a7aSLuis R. Rodriguez wiphy_update_new_beacon(&drv->wiphy, pending_beacon); 1487e38f8a7aSLuis R. Rodriguez 1488e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1489e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1490e38f8a7aSLuis R. Rodriguez } 1491e38f8a7aSLuis R. Rodriguez 1492e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1493e38f8a7aSLuis R. Rodriguez out: 1494e38f8a7aSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1495e38f8a7aSLuis R. Rodriguez } 1496e38f8a7aSLuis R. Rodriguez 1497fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1498fe33eb39SLuis R. Rodriguez { 1499fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1500e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 1501fe33eb39SLuis R. Rodriguez } 1502fe33eb39SLuis R. Rodriguez 1503fe33eb39SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 1504fe33eb39SLuis R. Rodriguez 1505fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1506fe33eb39SLuis R. Rodriguez { 1507fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1508fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1509fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1510fe33eb39SLuis R. Rodriguez 1511fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1512fe33eb39SLuis R. Rodriguez } 1513fe33eb39SLuis R. Rodriguez 1514fe33eb39SLuis R. Rodriguez /* Core regulatory hint -- happens once during cfg80211_init() */ 1515ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1516ba25c141SLuis R. Rodriguez { 1517ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1518ba25c141SLuis R. Rodriguez 1519ba25c141SLuis R. Rodriguez BUG_ON(last_request); 1520ba25c141SLuis R. Rodriguez 1521ba25c141SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1522ba25c141SLuis R. Rodriguez GFP_KERNEL); 1523ba25c141SLuis R. Rodriguez if (!request) 1524ba25c141SLuis R. Rodriguez return -ENOMEM; 1525ba25c141SLuis R. Rodriguez 1526ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1527ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1528ba25c141SLuis R. Rodriguez request->initiator = REGDOM_SET_BY_CORE; 1529ba25c141SLuis R. Rodriguez 1530fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1531ba25c141SLuis R. Rodriguez 1532fe33eb39SLuis R. Rodriguez return 0; 1533ba25c141SLuis R. Rodriguez } 1534ba25c141SLuis R. Rodriguez 1535fe33eb39SLuis R. Rodriguez /* User hints */ 1536fe33eb39SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2) 1537b2e1b302SLuis R. Rodriguez { 1538fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1539fe33eb39SLuis R. Rodriguez 1540be3d4810SJohannes Berg BUG_ON(!alpha2); 1541b2e1b302SLuis R. Rodriguez 1542fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1543fe33eb39SLuis R. Rodriguez if (!request) 1544fe33eb39SLuis R. Rodriguez return -ENOMEM; 1545fe33eb39SLuis R. Rodriguez 1546fe33eb39SLuis R. Rodriguez request->wiphy_idx = WIPHY_IDX_STALE; 1547fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1548fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1549fe33eb39SLuis R. Rodriguez request->initiator = REGDOM_SET_BY_USER, 1550fe33eb39SLuis R. Rodriguez 1551fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1552fe33eb39SLuis R. Rodriguez 1553fe33eb39SLuis R. Rodriguez return 0; 1554fe33eb39SLuis R. Rodriguez } 1555fe33eb39SLuis R. Rodriguez 1556fe33eb39SLuis R. Rodriguez /* Driver hints */ 1557fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1558fe33eb39SLuis R. Rodriguez { 1559fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1560fe33eb39SLuis R. Rodriguez 1561fe33eb39SLuis R. Rodriguez BUG_ON(!alpha2); 1562fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy); 1563fe33eb39SLuis R. Rodriguez 1564fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1565fe33eb39SLuis R. Rodriguez if (!request) 1566fe33eb39SLuis R. Rodriguez return -ENOMEM; 1567fe33eb39SLuis R. Rodriguez 1568fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1569fe33eb39SLuis R. Rodriguez 1570fe33eb39SLuis R. Rodriguez /* Must have registered wiphy first */ 1571fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); 1572fe33eb39SLuis R. Rodriguez 1573fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1574fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1575fe33eb39SLuis R. Rodriguez request->initiator = REGDOM_SET_BY_DRIVER; 1576fe33eb39SLuis R. Rodriguez 1577fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1578fe33eb39SLuis R. Rodriguez 1579fe33eb39SLuis R. Rodriguez return 0; 1580b2e1b302SLuis R. Rodriguez } 1581b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1582b2e1b302SLuis R. Rodriguez 15833f2355cbSLuis R. Rodriguez static bool reg_same_country_ie_hint(struct wiphy *wiphy, 15843f2355cbSLuis R. Rodriguez u32 country_ie_checksum) 15853f2355cbSLuis R. Rodriguez { 1586806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1587806a9e39SLuis R. Rodriguez 1588761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1589761cf7ecSLuis R. Rodriguez 1590806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1591806a9e39SLuis R. Rodriguez 1592806a9e39SLuis R. Rodriguez if (!request_wiphy) 15933f2355cbSLuis R. Rodriguez return false; 1594806a9e39SLuis R. Rodriguez 1595806a9e39SLuis R. Rodriguez if (likely(request_wiphy != wiphy)) 15963f2355cbSLuis R. Rodriguez return !country_ie_integrity_changes(country_ie_checksum); 1597fb1fc7adSLuis R. Rodriguez /* 1598fb1fc7adSLuis R. Rodriguez * We should not have let these through at this point, they 15993f2355cbSLuis R. Rodriguez * should have been picked up earlier by the first alpha2 check 1600fb1fc7adSLuis R. Rodriguez * on the device 1601fb1fc7adSLuis R. Rodriguez */ 16023f2355cbSLuis R. Rodriguez if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) 16033f2355cbSLuis R. Rodriguez return true; 16043f2355cbSLuis R. Rodriguez return false; 16053f2355cbSLuis R. Rodriguez } 16063f2355cbSLuis R. Rodriguez 16073f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 16083f2355cbSLuis R. Rodriguez u8 *country_ie, 16093f2355cbSLuis R. Rodriguez u8 country_ie_len) 16103f2355cbSLuis R. Rodriguez { 16113f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 16123f2355cbSLuis R. Rodriguez char alpha2[2]; 16133f2355cbSLuis R. Rodriguez u32 checksum = 0; 16143f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 1615fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 16163f2355cbSLuis R. Rodriguez 1617a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 16183f2355cbSLuis R. Rodriguez 1619d335fe63SLuis R. Rodriguez if (unlikely(!last_request)) { 1620d335fe63SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1621d335fe63SLuis R. Rodriguez return; 1622d335fe63SLuis R. Rodriguez } 1623d335fe63SLuis R. Rodriguez 16243f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 16253f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 16263f2355cbSLuis R. Rodriguez goto out; 16273f2355cbSLuis R. Rodriguez 16283f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 16293f2355cbSLuis R. Rodriguez goto out; 16303f2355cbSLuis R. Rodriguez 1631fb1fc7adSLuis R. Rodriguez /* 1632fb1fc7adSLuis R. Rodriguez * Pending country IE processing, this can happen after we 16333f2355cbSLuis R. Rodriguez * call CRDA and wait for a response if a beacon was received before 1634fb1fc7adSLuis R. Rodriguez * we were able to process the last regulatory_hint_11d() call 1635fb1fc7adSLuis R. Rodriguez */ 16363f2355cbSLuis R. Rodriguez if (country_ie_regdomain) 16373f2355cbSLuis R. Rodriguez goto out; 16383f2355cbSLuis R. Rodriguez 16393f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 16403f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 16413f2355cbSLuis R. Rodriguez 16423f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 16433f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 16443f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 16453f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 16463f2355cbSLuis R. Rodriguez 1647fb1fc7adSLuis R. Rodriguez /* 1648fb1fc7adSLuis R. Rodriguez * We will run this for *every* beacon processed for the BSSID, so 16493f2355cbSLuis R. Rodriguez * we optimize an early check to exit out early if we don't have to 1650fb1fc7adSLuis R. Rodriguez * do anything 1651fb1fc7adSLuis R. Rodriguez */ 1652806a9e39SLuis R. Rodriguez if (likely(wiphy_idx_valid(last_request->wiphy_idx))) { 16533f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv_last_ie; 16543f2355cbSLuis R. Rodriguez 1655806a9e39SLuis R. Rodriguez drv_last_ie = 1656806a9e39SLuis R. Rodriguez cfg80211_drv_by_wiphy_idx(last_request->wiphy_idx); 16573f2355cbSLuis R. Rodriguez 1658fb1fc7adSLuis R. Rodriguez /* 1659fb1fc7adSLuis R. Rodriguez * Lets keep this simple -- we trust the first AP 1660fb1fc7adSLuis R. Rodriguez * after we intersect with CRDA 1661fb1fc7adSLuis R. Rodriguez */ 1662806a9e39SLuis R. Rodriguez if (likely(&drv_last_ie->wiphy == wiphy)) { 1663fb1fc7adSLuis R. Rodriguez /* 1664fb1fc7adSLuis R. Rodriguez * Ignore IEs coming in on this wiphy with 1665fb1fc7adSLuis R. Rodriguez * the same alpha2 and environment cap 1666fb1fc7adSLuis R. Rodriguez */ 16673f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 16683f2355cbSLuis R. Rodriguez alpha2) && 16693f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 16703f2355cbSLuis R. Rodriguez goto out; 16713f2355cbSLuis R. Rodriguez } 1672fb1fc7adSLuis R. Rodriguez /* 1673fb1fc7adSLuis R. Rodriguez * the wiphy moved on to another BSSID or the AP 16743f2355cbSLuis R. Rodriguez * was reconfigured. XXX: We need to deal with the 16753f2355cbSLuis R. Rodriguez * case where the user suspends and goes to goes 16763f2355cbSLuis R. Rodriguez * to another country, and then gets IEs from an 1677fb1fc7adSLuis R. Rodriguez * AP with different settings 1678fb1fc7adSLuis R. Rodriguez */ 16793f2355cbSLuis R. Rodriguez goto out; 16803f2355cbSLuis R. Rodriguez } else { 1681fb1fc7adSLuis R. Rodriguez /* 1682fb1fc7adSLuis R. Rodriguez * Ignore IEs coming in on two separate wiphys with 1683fb1fc7adSLuis R. Rodriguez * the same alpha2 and environment cap 1684fb1fc7adSLuis R. Rodriguez */ 16853f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 16863f2355cbSLuis R. Rodriguez alpha2) && 16873f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 16883f2355cbSLuis R. Rodriguez goto out; 16893f2355cbSLuis R. Rodriguez } 16903f2355cbSLuis R. Rodriguez /* We could potentially intersect though */ 16913f2355cbSLuis R. Rodriguez goto out; 16923f2355cbSLuis R. Rodriguez } 16933f2355cbSLuis R. Rodriguez } 16943f2355cbSLuis R. Rodriguez 16953f2355cbSLuis R. Rodriguez rd = country_ie_2_rd(country_ie, country_ie_len, &checksum); 16963f2355cbSLuis R. Rodriguez if (!rd) 16973f2355cbSLuis R. Rodriguez goto out; 16983f2355cbSLuis R. Rodriguez 1699915278e0SLuis R. Rodriguez /* 1700915278e0SLuis R. Rodriguez * This will not happen right now but we leave it here for the 17013f2355cbSLuis R. Rodriguez * the future when we want to add suspend/resume support and having 17023f2355cbSLuis R. Rodriguez * the user move to another country after doing so, or having the user 1703915278e0SLuis R. Rodriguez * move to another AP. Right now we just trust the first AP. 1704915278e0SLuis R. Rodriguez * 1705915278e0SLuis R. Rodriguez * If we hit this before we add this support we want to be informed of 1706915278e0SLuis R. Rodriguez * it as it would indicate a mistake in the current design 1707915278e0SLuis R. Rodriguez */ 1708915278e0SLuis R. Rodriguez if (WARN_ON(reg_same_country_ie_hint(wiphy, checksum))) 17090441d6ffSLuis R. Rodriguez goto free_rd_out; 17103f2355cbSLuis R. Rodriguez 1711fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1712fe33eb39SLuis R. Rodriguez if (!request) 1713fe33eb39SLuis R. Rodriguez goto free_rd_out; 1714fe33eb39SLuis R. Rodriguez 1715fb1fc7adSLuis R. Rodriguez /* 1716fb1fc7adSLuis R. Rodriguez * We keep this around for when CRDA comes back with a response so 1717fb1fc7adSLuis R. Rodriguez * we can intersect with that 1718fb1fc7adSLuis R. Rodriguez */ 17193f2355cbSLuis R. Rodriguez country_ie_regdomain = rd; 17203f2355cbSLuis R. Rodriguez 1721fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1722fe33eb39SLuis R. Rodriguez request->alpha2[0] = rd->alpha2[0]; 1723fe33eb39SLuis R. Rodriguez request->alpha2[1] = rd->alpha2[1]; 1724fe33eb39SLuis R. Rodriguez request->initiator = REGDOM_SET_BY_COUNTRY_IE; 1725fe33eb39SLuis R. Rodriguez request->country_ie_checksum = checksum; 1726fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 17273f2355cbSLuis R. Rodriguez 1728fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1729fe33eb39SLuis R. Rodriguez 1730fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1731fe33eb39SLuis R. Rodriguez 1732fe33eb39SLuis R. Rodriguez return; 17330441d6ffSLuis R. Rodriguez 17340441d6ffSLuis R. Rodriguez free_rd_out: 17350441d6ffSLuis R. Rodriguez kfree(rd); 17363f2355cbSLuis R. Rodriguez out: 1737a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 17383f2355cbSLuis R. Rodriguez } 17393f2355cbSLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint_11d); 1740b2e1b302SLuis R. Rodriguez 1741e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 1742e38f8a7aSLuis R. Rodriguez { 1743e38f8a7aSLuis R. Rodriguez if (freq == ieee80211_channel_to_frequency(12) || 1744e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(13) || 1745e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(14)) 1746e38f8a7aSLuis R. Rodriguez return true; 1747e38f8a7aSLuis R. Rodriguez return false; 1748e38f8a7aSLuis R. Rodriguez } 1749e38f8a7aSLuis R. Rodriguez 1750e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 1751e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 1752e38f8a7aSLuis R. Rodriguez gfp_t gfp) 1753e38f8a7aSLuis R. Rodriguez { 1754e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1755e38f8a7aSLuis R. Rodriguez 1756e38f8a7aSLuis R. Rodriguez if (likely((beacon_chan->beacon_found || 1757e38f8a7aSLuis R. Rodriguez (beacon_chan->flags & IEEE80211_CHAN_RADAR) || 1758e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 1759e38f8a7aSLuis R. Rodriguez !freq_is_chan_12_13_14(beacon_chan->center_freq))))) 1760e38f8a7aSLuis R. Rodriguez return 0; 1761e38f8a7aSLuis R. Rodriguez 1762e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 1763e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 1764e38f8a7aSLuis R. Rodriguez return -ENOMEM; 1765e38f8a7aSLuis R. Rodriguez 1766e38f8a7aSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 1767e38f8a7aSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Found new beacon on " 1768e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", 1769e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 1770e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 1771e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 1772e38f8a7aSLuis R. Rodriguez #endif 1773e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 1774e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 1775e38f8a7aSLuis R. Rodriguez 1776e38f8a7aSLuis R. Rodriguez 1777e38f8a7aSLuis R. Rodriguez /* 1778e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 1779e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 1780e38f8a7aSLuis R. Rodriguez */ 1781e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1782e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 1783e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1784e38f8a7aSLuis R. Rodriguez 1785e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 1786e38f8a7aSLuis R. Rodriguez 1787e38f8a7aSLuis R. Rodriguez return 0; 1788e38f8a7aSLuis R. Rodriguez } 1789e38f8a7aSLuis R. Rodriguez 1790a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1791b2e1b302SLuis R. Rodriguez { 1792b2e1b302SLuis R. Rodriguez unsigned int i; 1793a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1794a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1795a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1796b2e1b302SLuis R. Rodriguez 1797b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), " 1798b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 1799b2e1b302SLuis R. Rodriguez 1800b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1801b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1802b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1803b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1804b2e1b302SLuis R. Rodriguez 1805fb1fc7adSLuis R. Rodriguez /* 1806fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 1807fb1fc7adSLuis R. Rodriguez * in certain regions 1808fb1fc7adSLuis R. Rodriguez */ 1809b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1810b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1811b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 1812b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1813b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1814b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1815b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1816b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1817b2e1b302SLuis R. Rodriguez else 1818b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1819b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 1820b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1821b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1822b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1823b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1824b2e1b302SLuis R. Rodriguez } 1825b2e1b302SLuis R. Rodriguez } 1826b2e1b302SLuis R. Rodriguez 1827a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 1828b2e1b302SLuis R. Rodriguez { 1829b2e1b302SLuis R. Rodriguez 18303f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 18313f2355cbSLuis R. Rodriguez 18323f2355cbSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { 1833806a9e39SLuis R. Rodriguez struct cfg80211_registered_device *drv; 1834806a9e39SLuis R. Rodriguez drv = cfg80211_drv_by_wiphy_idx( 1835806a9e39SLuis R. Rodriguez last_request->wiphy_idx); 1836806a9e39SLuis R. Rodriguez if (drv) { 18373f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 18383f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 18393f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0], 18403f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1]); 18413f2355cbSLuis R. Rodriguez } else 18423f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 18433f2355cbSLuis R. Rodriguez "domain intersected: \n"); 18443f2355cbSLuis R. Rodriguez } else 18453f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 1846039498c6SLuis R. Rodriguez "domain intersected: \n"); 18473f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 1848b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 1849b2e1b302SLuis R. Rodriguez "domain updated:\n"); 1850b2e1b302SLuis R. Rodriguez else { 1851b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 1852b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1853b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 1854b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 1855b2e1b302SLuis R. Rodriguez else 1856b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1857b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 1858b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1859b2e1b302SLuis R. Rodriguez } 1860b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1861b2e1b302SLuis R. Rodriguez } 1862b2e1b302SLuis R. Rodriguez 18632df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 1864b2e1b302SLuis R. Rodriguez { 1865b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 1866b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1867b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1868b2e1b302SLuis R. Rodriguez } 1869b2e1b302SLuis R. Rodriguez 18703f2355cbSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 18713f2355cbSLuis R. Rodriguez static void reg_country_ie_process_debug( 18723f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 18733f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 18743f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 18753f2355cbSLuis R. Rodriguez { 18763f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Received country IE:\n"); 18773f2355cbSLuis R. Rodriguez print_regdomain_info(country_ie_regdomain); 18783f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); 18793f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 18803f2355cbSLuis R. Rodriguez if (intersected_rd) { 18813f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: We intersect both of these " 18823f2355cbSLuis R. Rodriguez "and get:\n"); 1883667ecd01SLuis R. Rodriguez print_regdomain_info(intersected_rd); 18843f2355cbSLuis R. Rodriguez return; 18853f2355cbSLuis R. Rodriguez } 18863f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); 18873f2355cbSLuis R. Rodriguez } 18883f2355cbSLuis R. Rodriguez #else 18893f2355cbSLuis R. Rodriguez static inline void reg_country_ie_process_debug( 18903f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 18913f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 18923f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 18933f2355cbSLuis R. Rodriguez { 18943f2355cbSLuis R. Rodriguez } 18953f2355cbSLuis R. Rodriguez #endif 18963f2355cbSLuis R. Rodriguez 1897d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 1898a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 1899b2e1b302SLuis R. Rodriguez { 19009c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 19013f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv = NULL; 1902806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1903b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 1904b2e1b302SLuis R. Rodriguez 1905b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 1906f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1907b2e1b302SLuis R. Rodriguez return -EINVAL; 1908b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 1909b2e1b302SLuis R. Rodriguez return 0; 1910b2e1b302SLuis R. Rodriguez } 1911b2e1b302SLuis R. Rodriguez 1912b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 1913b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 1914b2e1b302SLuis R. Rodriguez return -EINVAL; 1915b2e1b302SLuis R. Rodriguez 1916f6037d09SJohannes Berg if (!last_request) 1917b2e1b302SLuis R. Rodriguez return -EINVAL; 1918b2e1b302SLuis R. Rodriguez 1919fb1fc7adSLuis R. Rodriguez /* 1920fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 19213f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 1922fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 1923fb1fc7adSLuis R. Rodriguez */ 19243f2355cbSLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) { 1925fb1fc7adSLuis R. Rodriguez /* 1926fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 1927fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 1928fb1fc7adSLuis R. Rodriguez */ 1929b2e1b302SLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 193069b1572bSLuis R. Rodriguez !regdom_changes(rd->alpha2)) 1931b2e1b302SLuis R. Rodriguez return -EINVAL; 19323f2355cbSLuis R. Rodriguez } 19333f2355cbSLuis R. Rodriguez 1934fb1fc7adSLuis R. Rodriguez /* 1935fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 1936b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 1937b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 1938fb1fc7adSLuis R. Rodriguez * internal EEPROM data 1939fb1fc7adSLuis R. Rodriguez */ 1940b2e1b302SLuis R. Rodriguez 1941f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1942b2e1b302SLuis R. Rodriguez return -EINVAL; 1943b2e1b302SLuis R. Rodriguez 1944b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 1945b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 1946b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 1947b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 1948b2e1b302SLuis R. Rodriguez return -EINVAL; 1949b2e1b302SLuis R. Rodriguez } 1950b2e1b302SLuis R. Rodriguez 1951806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1952806a9e39SLuis R. Rodriguez 1953b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 19543e0c3ff3SLuis R. Rodriguez int r; 19553e0c3ff3SLuis R. Rodriguez 19563e0c3ff3SLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_DRIVER) { 19573e0c3ff3SLuis R. Rodriguez reset_regdomains(); 19583e0c3ff3SLuis R. Rodriguez cfg80211_regdomain = rd; 19593e0c3ff3SLuis R. Rodriguez return 0; 19603e0c3ff3SLuis R. Rodriguez } 19613e0c3ff3SLuis R. Rodriguez 1962fb1fc7adSLuis R. Rodriguez /* 1963fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 1964fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 1965fb1fc7adSLuis R. Rodriguez */ 19663e0c3ff3SLuis R. Rodriguez 1967806a9e39SLuis R. Rodriguez BUG_ON(request_wiphy->regd); 19683e0c3ff3SLuis R. Rodriguez 1969806a9e39SLuis R. Rodriguez r = reg_copy_regd(&request_wiphy->regd, rd); 19703e0c3ff3SLuis R. Rodriguez if (r) 19713e0c3ff3SLuis R. Rodriguez return r; 19723e0c3ff3SLuis R. Rodriguez 1973b8295acdSLuis R. Rodriguez reset_regdomains(); 1974b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 1975b8295acdSLuis R. Rodriguez return 0; 1976b8295acdSLuis R. Rodriguez } 1977b8295acdSLuis R. Rodriguez 1978b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 1979b8295acdSLuis R. Rodriguez 1980b8295acdSLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) { 1981b8295acdSLuis R. Rodriguez 19829c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 19839c96477dSLuis R. Rodriguez if (!intersected_rd) 19849c96477dSLuis R. Rodriguez return -EINVAL; 1985b8295acdSLuis R. Rodriguez 1986fb1fc7adSLuis R. Rodriguez /* 1987fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 19883e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 1989fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 1990fb1fc7adSLuis R. Rodriguez */ 19913e0c3ff3SLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_DRIVER) 1992806a9e39SLuis R. Rodriguez request_wiphy->regd = rd; 19933e0c3ff3SLuis R. Rodriguez else 19949c96477dSLuis R. Rodriguez kfree(rd); 19953e0c3ff3SLuis R. Rodriguez 1996b8295acdSLuis R. Rodriguez rd = NULL; 1997b8295acdSLuis R. Rodriguez 1998b8295acdSLuis R. Rodriguez reset_regdomains(); 1999b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2000b8295acdSLuis R. Rodriguez 2001b8295acdSLuis R. Rodriguez return 0; 20029c96477dSLuis R. Rodriguez } 20039c96477dSLuis R. Rodriguez 20043f2355cbSLuis R. Rodriguez /* 20053f2355cbSLuis R. Rodriguez * Country IE requests are handled a bit differently, we intersect 20063f2355cbSLuis R. Rodriguez * the country IE rd with what CRDA believes that country should have 20073f2355cbSLuis R. Rodriguez */ 20083f2355cbSLuis R. Rodriguez 20093f2355cbSLuis R. Rodriguez BUG_ON(!country_ie_regdomain); 20103f2355cbSLuis R. Rodriguez 20113f2355cbSLuis R. Rodriguez if (rd != country_ie_regdomain) { 2012fb1fc7adSLuis R. Rodriguez /* 2013fb1fc7adSLuis R. Rodriguez * Intersect what CRDA returned and our what we 2014fb1fc7adSLuis R. Rodriguez * had built from the Country IE received 2015fb1fc7adSLuis R. Rodriguez */ 20163f2355cbSLuis R. Rodriguez 20173f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, country_ie_regdomain); 20183f2355cbSLuis R. Rodriguez 20193f2355cbSLuis R. Rodriguez reg_country_ie_process_debug(rd, country_ie_regdomain, 20203f2355cbSLuis R. Rodriguez intersected_rd); 20213f2355cbSLuis R. Rodriguez 20223f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 20233f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 20243f2355cbSLuis R. Rodriguez } else { 2025fb1fc7adSLuis R. Rodriguez /* 2026fb1fc7adSLuis R. Rodriguez * This would happen when CRDA was not present and 20273f2355cbSLuis R. Rodriguez * OLD_REGULATORY was enabled. We intersect our Country 2028fb1fc7adSLuis R. Rodriguez * IE rd and what was set on cfg80211 originally 2029fb1fc7adSLuis R. Rodriguez */ 20303f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 20313f2355cbSLuis R. Rodriguez } 20323f2355cbSLuis R. Rodriguez 20333f2355cbSLuis R. Rodriguez if (!intersected_rd) 20343f2355cbSLuis R. Rodriguez return -EINVAL; 20353f2355cbSLuis R. Rodriguez 2036806a9e39SLuis R. Rodriguez drv = wiphy_to_dev(request_wiphy); 20373f2355cbSLuis R. Rodriguez 20383f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0] = rd->alpha2[0]; 20393f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1] = rd->alpha2[1]; 20403f2355cbSLuis R. Rodriguez drv->env = last_request->country_ie_env; 20413f2355cbSLuis R. Rodriguez 20423f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 20433f2355cbSLuis R. Rodriguez 20443f2355cbSLuis R. Rodriguez kfree(rd); 20453f2355cbSLuis R. Rodriguez rd = NULL; 20463f2355cbSLuis R. Rodriguez 2047b8295acdSLuis R. Rodriguez reset_regdomains(); 20483f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2049b2e1b302SLuis R. Rodriguez 2050b2e1b302SLuis R. Rodriguez return 0; 2051b2e1b302SLuis R. Rodriguez } 2052b2e1b302SLuis R. Rodriguez 2053b2e1b302SLuis R. Rodriguez 2054fb1fc7adSLuis R. Rodriguez /* 2055fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2056b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2057fb1fc7adSLuis R. Rodriguez * kmalloc'd the rd structure. Caller must hold cfg80211_mutex 2058fb1fc7adSLuis R. Rodriguez */ 2059a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2060b2e1b302SLuis R. Rodriguez { 2061b2e1b302SLuis R. Rodriguez int r; 2062b2e1b302SLuis R. Rodriguez 2063761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2064761cf7ecSLuis R. Rodriguez 2065b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 2066b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 2067d2372b31SJohannes Berg if (r) { 2068d2372b31SJohannes Berg kfree(rd); 2069b2e1b302SLuis R. Rodriguez return r; 2070d2372b31SJohannes Berg } 2071b2e1b302SLuis R. Rodriguez 2072b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 2073a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 2074b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 2075b2e1b302SLuis R. Rodriguez 2076b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2077f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 2078b2e1b302SLuis R. Rodriguez 2079a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 2080b2e1b302SLuis R. Rodriguez 2081b2e1b302SLuis R. Rodriguez return r; 2082b2e1b302SLuis R. Rodriguez } 2083b2e1b302SLuis R. Rodriguez 2084a1794390SLuis R. Rodriguez /* Caller must hold cfg80211_mutex */ 20853f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 20863f2355cbSLuis R. Rodriguez { 2087806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 2088806a9e39SLuis R. Rodriguez 2089761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2090761cf7ecSLuis R. Rodriguez 2091806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2092806a9e39SLuis R. Rodriguez 20933e0c3ff3SLuis R. Rodriguez kfree(wiphy->regd); 2094806a9e39SLuis R. Rodriguez if (!last_request || !request_wiphy) 20953f2355cbSLuis R. Rodriguez return; 2096806a9e39SLuis R. Rodriguez if (request_wiphy != wiphy) 20973f2355cbSLuis R. Rodriguez return; 2098806a9e39SLuis R. Rodriguez last_request->wiphy_idx = WIPHY_IDX_STALE; 20993f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 21003f2355cbSLuis R. Rodriguez } 21013f2355cbSLuis R. Rodriguez 2102b2e1b302SLuis R. Rodriguez int regulatory_init(void) 2103b2e1b302SLuis R. Rodriguez { 2104bcf4f99bSLuis R. Rodriguez int err = 0; 2105734366deSJohannes Berg 2106b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 2107b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 2108b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 2109734366deSJohannes Berg 2110fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 2111e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2112fe33eb39SLuis R. Rodriguez 2113734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 2114a3d2eaf0SJohannes Berg cfg80211_regdomain = static_regdom(ieee80211_regdom); 2115734366deSJohannes Berg 2116942b25cfSJohannes Berg printk(KERN_INFO "cfg80211: Using static regulatory domain info\n"); 2117734366deSJohannes Berg print_regdomain_info(cfg80211_regdomain); 2118fb1fc7adSLuis R. Rodriguez /* 2119fb1fc7adSLuis R. Rodriguez * The old code still requests for a new regdomain and if 2120734366deSJohannes Berg * you have CRDA you get it updated, otherwise you get 2121734366deSJohannes Berg * stuck with the static values. We ignore "EU" code as 2122fb1fc7adSLuis R. Rodriguez * that is not a valid ISO / IEC 3166 alpha2 2123fb1fc7adSLuis R. Rodriguez */ 2124ac9440a4SJohannes Berg if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U') 2125ba25c141SLuis R. Rodriguez err = regulatory_hint_core(ieee80211_regdom); 2126734366deSJohannes Berg #else 2127a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 2128734366deSJohannes Berg 2129ba25c141SLuis R. Rodriguez err = regulatory_hint_core("00"); 2130734366deSJohannes Berg #endif 2131bcf4f99bSLuis R. Rodriguez if (err) { 2132bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2133bcf4f99bSLuis R. Rodriguez return err; 2134bcf4f99bSLuis R. Rodriguez /* 2135bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2136bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2137bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2138bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2139bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2140bcf4f99bSLuis R. Rodriguez */ 2141bcf4f99bSLuis R. Rodriguez printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " 2142bcf4f99bSLuis R. Rodriguez "to call CRDA during init"); 2143bcf4f99bSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 2144bcf4f99bSLuis R. Rodriguez /* We want to find out exactly why when debugging */ 2145bcf4f99bSLuis R. Rodriguez WARN_ON(err); 2146bcf4f99bSLuis R. Rodriguez #endif 2147bcf4f99bSLuis R. Rodriguez } 2148734366deSJohannes Berg 2149b2e1b302SLuis R. Rodriguez return 0; 2150b2e1b302SLuis R. Rodriguez } 2151b2e1b302SLuis R. Rodriguez 2152b2e1b302SLuis R. Rodriguez void regulatory_exit(void) 2153b2e1b302SLuis R. Rodriguez { 2154fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2155e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2156fe33eb39SLuis R. Rodriguez 2157fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2158fe33eb39SLuis R. Rodriguez 2159a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 2160734366deSJohannes Berg 2161b2e1b302SLuis R. Rodriguez reset_regdomains(); 2162734366deSJohannes Berg 21633f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 21643f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 21653f2355cbSLuis R. Rodriguez 2166f6037d09SJohannes Berg kfree(last_request); 2167f6037d09SJohannes Berg 2168b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2169734366deSJohannes Berg 2170e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2171e38f8a7aSLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 2172e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2173e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2174e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2175e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2176e38f8a7aSLuis R. Rodriguez } 2177e38f8a7aSLuis R. Rodriguez } 2178e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2179e38f8a7aSLuis R. Rodriguez 2180e38f8a7aSLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 2181e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2182e38f8a7aSLuis R. Rodriguez ®_beacon_list, list) { 2183e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2184e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2185e38f8a7aSLuis R. Rodriguez } 2186e38f8a7aSLuis R. Rodriguez } 2187e38f8a7aSLuis R. Rodriguez 2188fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2189fe33eb39SLuis R. Rodriguez if (!list_empty(®_requests_list)) { 2190fe33eb39SLuis R. Rodriguez list_for_each_entry_safe(reg_request, tmp, 2191fe33eb39SLuis R. Rodriguez ®_requests_list, list) { 2192fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2193fe33eb39SLuis R. Rodriguez kfree(reg_request); 2194fe33eb39SLuis R. Rodriguez } 2195fe33eb39SLuis R. Rodriguez } 2196fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2197fe33eb39SLuis R. Rodriguez 2198a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 21998318d78aSJohannes Berg } 2200