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> 365a0e3ad6STejun Heo #include <linux/slab.h> 37b2e1b302SLuis R. Rodriguez #include <linux/list.h> 38b2e1b302SLuis R. Rodriguez #include <linux/random.h> 39b2e1b302SLuis R. Rodriguez #include <linux/nl80211.h> 40b2e1b302SLuis R. Rodriguez #include <linux/platform_device.h> 41b2e1b302SLuis R. Rodriguez #include <net/cfg80211.h> 428318d78aSJohannes Berg #include "core.h" 43b2e1b302SLuis R. Rodriguez #include "reg.h" 443b377ea9SJohn W. Linville #include "regdb.h" 4573d54c9eSLuis R. Rodriguez #include "nl80211.h" 468318d78aSJohannes Berg 474113f751SLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 488271195eSJohn W. Linville #define REG_DBG_PRINT(format, args...) \ 494113f751SLuis R. Rodriguez do { \ 508271195eSJohn W. Linville printk(KERN_DEBUG format , ## args); \ 514113f751SLuis R. Rodriguez } while (0) 524113f751SLuis R. Rodriguez #else 538271195eSJohn W. Linville #define REG_DBG_PRINT(args...) 544113f751SLuis R. Rodriguez #endif 554113f751SLuis R. Rodriguez 565166ccd2SLuis R. Rodriguez /* Receipt of information from last regulatory request */ 57f6037d09SJohannes Berg static struct regulatory_request *last_request; 58734366deSJohannes Berg 59b2e1b302SLuis R. Rodriguez /* To trigger userspace events */ 60b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 618318d78aSJohannes Berg 62fb1fc7adSLuis R. Rodriguez /* 63fb1fc7adSLuis R. Rodriguez * Central wireless core regulatory domains, we only need two, 64734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 65fb1fc7adSLuis R. Rodriguez * information to give us an alpha2 66fb1fc7adSLuis R. Rodriguez */ 67f130347cSLuis R. Rodriguez const struct ieee80211_regdomain *cfg80211_regdomain; 68734366deSJohannes Berg 69fb1fc7adSLuis R. Rodriguez /* 70fb1fc7adSLuis R. Rodriguez * We use this as a place for the rd structure built from the 713f2355cbSLuis R. Rodriguez * last parsed country IE to rest until CRDA gets back to us with 72fb1fc7adSLuis R. Rodriguez * what it thinks should apply for the same country 73fb1fc7adSLuis R. Rodriguez */ 743f2355cbSLuis R. Rodriguez static const struct ieee80211_regdomain *country_ie_regdomain; 753f2355cbSLuis R. Rodriguez 76abc7381bSLuis R. Rodriguez /* 77abc7381bSLuis R. Rodriguez * Protects static reg.c components: 78abc7381bSLuis R. Rodriguez * - cfg80211_world_regdom 79abc7381bSLuis R. Rodriguez * - cfg80211_regdom 80abc7381bSLuis R. Rodriguez * - country_ie_regdomain 81abc7381bSLuis R. Rodriguez * - last_request 82abc7381bSLuis R. Rodriguez */ 83abc7381bSLuis R. Rodriguez DEFINE_MUTEX(reg_mutex); 84abc7381bSLuis R. Rodriguez #define assert_reg_lock() WARN_ON(!mutex_is_locked(®_mutex)) 85abc7381bSLuis R. Rodriguez 86e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 87fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 88fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 89fe33eb39SLuis R. Rodriguez 90e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 91e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 92e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 93e38f8a7aSLuis R. Rodriguez 94e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 95e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 96e38f8a7aSLuis R. Rodriguez 97e38f8a7aSLuis R. Rodriguez struct reg_beacon { 98e38f8a7aSLuis R. Rodriguez struct list_head list; 99e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 100e38f8a7aSLuis R. Rodriguez }; 101e38f8a7aSLuis R. Rodriguez 102734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 103734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 104611b6a82SLuis R. Rodriguez .n_reg_rules = 5, 105734366deSJohannes Berg .alpha2 = "00", 106734366deSJohannes Berg .reg_rules = { 10768798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 10868798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 109611b6a82SLuis R. Rodriguez /* IEEE 802.11b/g, channels 12..13. No HT40 110611b6a82SLuis R. Rodriguez * channel fits here. */ 111611b6a82SLuis R. Rodriguez REG_RULE(2467-10, 2472+10, 20, 6, 20, 112611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 113611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 114611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 115611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 116611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 117611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 118611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS | 119611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 1203fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 121ec329aceSLuis R. Rodriguez REG_RULE(5180-10, 5240+10, 40, 6, 20, 1223fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1233fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 1243fc71f77SLuis R. Rodriguez 1253fc71f77SLuis R. Rodriguez /* NB: 5260 MHz - 5700 MHz requies DFS */ 1263fc71f77SLuis R. Rodriguez 1273fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 128ec329aceSLuis R. Rodriguez REG_RULE(5745-10, 5825+10, 40, 6, 20, 1293fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1303fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 131734366deSJohannes Berg } 132734366deSJohannes Berg }; 133734366deSJohannes Berg 134a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 135a3d2eaf0SJohannes Berg &world_regdom; 136734366deSJohannes Berg 1376ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 13809d989d1SLuis R. Rodriguez static char user_alpha2[2]; 1396ee7d330SLuis R. Rodriguez 140734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 141734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 142734366deSJohannes Berg 143734366deSJohannes Berg static void reset_regdomains(void) 144734366deSJohannes Berg { 145942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 146942b25cfSJohannes Berg if (cfg80211_regdomain == cfg80211_world_regdom) 147942b25cfSJohannes Berg cfg80211_regdomain = NULL; 148942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 149942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 150942b25cfSJohannes Berg if (cfg80211_regdomain == &world_regdom) 151942b25cfSJohannes Berg cfg80211_regdomain = NULL; 152942b25cfSJohannes Berg 153734366deSJohannes Berg kfree(cfg80211_regdomain); 154734366deSJohannes Berg kfree(cfg80211_world_regdom); 155734366deSJohannes Berg 156a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 157734366deSJohannes Berg cfg80211_regdomain = NULL; 158734366deSJohannes Berg } 159734366deSJohannes Berg 160fb1fc7adSLuis R. Rodriguez /* 161fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 162fb1fc7adSLuis R. Rodriguez * core upon initialization 163fb1fc7adSLuis R. Rodriguez */ 164a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 165734366deSJohannes Berg { 166f6037d09SJohannes Berg BUG_ON(!last_request); 167734366deSJohannes Berg 168734366deSJohannes Berg reset_regdomains(); 169734366deSJohannes Berg 170734366deSJohannes Berg cfg80211_world_regdom = rd; 171734366deSJohannes Berg cfg80211_regdomain = rd; 172734366deSJohannes Berg } 173734366deSJohannes Berg 174a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 175b2e1b302SLuis R. Rodriguez { 176b2e1b302SLuis R. Rodriguez if (!alpha2) 177b2e1b302SLuis R. Rodriguez return false; 178b2e1b302SLuis R. Rodriguez if (alpha2[0] == '0' && alpha2[1] == '0') 179b2e1b302SLuis R. Rodriguez return true; 180b2e1b302SLuis R. Rodriguez return false; 181b2e1b302SLuis R. Rodriguez } 182b2e1b302SLuis R. Rodriguez 183a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 184b2e1b302SLuis R. Rodriguez { 185b2e1b302SLuis R. Rodriguez if (!alpha2) 186b2e1b302SLuis R. Rodriguez return false; 187b2e1b302SLuis R. Rodriguez if (alpha2[0] != 0 && alpha2[1] != 0) 188b2e1b302SLuis R. Rodriguez return true; 189b2e1b302SLuis R. Rodriguez return false; 190b2e1b302SLuis R. Rodriguez } 191b2e1b302SLuis R. Rodriguez 192b2e1b302SLuis R. Rodriguez static bool is_alpha_upper(char letter) 193b2e1b302SLuis R. Rodriguez { 194b2e1b302SLuis R. Rodriguez /* ASCII A - Z */ 195b2e1b302SLuis R. Rodriguez if (letter >= 65 && letter <= 90) 196b2e1b302SLuis R. Rodriguez return true; 197b2e1b302SLuis R. Rodriguez return false; 198b2e1b302SLuis R. Rodriguez } 199b2e1b302SLuis R. Rodriguez 200a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 201b2e1b302SLuis R. Rodriguez { 202b2e1b302SLuis R. Rodriguez if (!alpha2) 203b2e1b302SLuis R. Rodriguez return false; 204fb1fc7adSLuis R. Rodriguez /* 205fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 206fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 207fb1fc7adSLuis R. Rodriguez */ 208b2e1b302SLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '9') 209b2e1b302SLuis R. Rodriguez return true; 210b2e1b302SLuis R. Rodriguez return false; 211b2e1b302SLuis R. Rodriguez } 212b2e1b302SLuis R. Rodriguez 2133f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2143f2355cbSLuis R. Rodriguez { 2153f2355cbSLuis R. Rodriguez if (!alpha2) 2163f2355cbSLuis R. Rodriguez return false; 217fb1fc7adSLuis R. Rodriguez /* 218fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 2193f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 220fb1fc7adSLuis R. Rodriguez * structures 221fb1fc7adSLuis R. Rodriguez */ 2223f2355cbSLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '8') 2233f2355cbSLuis R. Rodriguez return true; 2243f2355cbSLuis R. Rodriguez return false; 2253f2355cbSLuis R. Rodriguez } 2263f2355cbSLuis R. Rodriguez 227a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 228b2e1b302SLuis R. Rodriguez { 229b2e1b302SLuis R. Rodriguez if (!alpha2) 230b2e1b302SLuis R. Rodriguez return false; 231b2e1b302SLuis R. Rodriguez if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) 232b2e1b302SLuis R. Rodriguez return true; 233b2e1b302SLuis R. Rodriguez return false; 234b2e1b302SLuis R. Rodriguez } 235b2e1b302SLuis R. Rodriguez 236a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 237b2e1b302SLuis R. Rodriguez { 238b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 239b2e1b302SLuis R. Rodriguez return false; 240b2e1b302SLuis R. Rodriguez if (alpha2_x[0] == alpha2_y[0] && 241b2e1b302SLuis R. Rodriguez alpha2_x[1] == alpha2_y[1]) 242b2e1b302SLuis R. Rodriguez return true; 243b2e1b302SLuis R. Rodriguez return false; 244b2e1b302SLuis R. Rodriguez } 245b2e1b302SLuis R. Rodriguez 24669b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 247b2e1b302SLuis R. Rodriguez { 248761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 249761cf7ecSLuis R. Rodriguez 250b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 251b2e1b302SLuis R. Rodriguez return true; 252b2e1b302SLuis R. Rodriguez if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 253b2e1b302SLuis R. Rodriguez return false; 254b2e1b302SLuis R. Rodriguez return true; 255b2e1b302SLuis R. Rodriguez } 256b2e1b302SLuis R. Rodriguez 25709d989d1SLuis R. Rodriguez /* 25809d989d1SLuis R. Rodriguez * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets 25909d989d1SLuis R. Rodriguez * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER 26009d989d1SLuis R. Rodriguez * has ever been issued. 26109d989d1SLuis R. Rodriguez */ 26209d989d1SLuis R. Rodriguez static bool is_user_regdom_saved(void) 26309d989d1SLuis R. Rodriguez { 26409d989d1SLuis R. Rodriguez if (user_alpha2[0] == '9' && user_alpha2[1] == '7') 26509d989d1SLuis R. Rodriguez return false; 26609d989d1SLuis R. Rodriguez 26709d989d1SLuis R. Rodriguez /* This would indicate a mistake on the design */ 26809d989d1SLuis R. Rodriguez if (WARN((!is_world_regdom(user_alpha2) && 26909d989d1SLuis R. Rodriguez !is_an_alpha2(user_alpha2)), 27009d989d1SLuis R. Rodriguez "Unexpected user alpha2: %c%c\n", 27109d989d1SLuis R. Rodriguez user_alpha2[0], 27209d989d1SLuis R. Rodriguez user_alpha2[1])) 27309d989d1SLuis R. Rodriguez return false; 27409d989d1SLuis R. Rodriguez 27509d989d1SLuis R. Rodriguez return true; 27609d989d1SLuis R. Rodriguez } 27709d989d1SLuis R. Rodriguez 2783f2355cbSLuis R. Rodriguez /** 2793f2355cbSLuis R. Rodriguez * country_ie_integrity_changes - tells us if the country IE has changed 2803f2355cbSLuis R. Rodriguez * @checksum: checksum of country IE of fields we are interested in 2813f2355cbSLuis R. Rodriguez * 2823f2355cbSLuis R. Rodriguez * If the country IE has not changed you can ignore it safely. This is 2833f2355cbSLuis R. Rodriguez * useful to determine if two devices are seeing two different country IEs 2843f2355cbSLuis R. Rodriguez * even on the same alpha2. Note that this will return false if no IE has 2853f2355cbSLuis R. Rodriguez * been set on the wireless core yet. 2863f2355cbSLuis R. Rodriguez */ 2873f2355cbSLuis R. Rodriguez static bool country_ie_integrity_changes(u32 checksum) 2883f2355cbSLuis R. Rodriguez { 2893f2355cbSLuis R. Rodriguez /* If no IE has been set then the checksum doesn't change */ 2903f2355cbSLuis R. Rodriguez if (unlikely(!last_request->country_ie_checksum)) 2913f2355cbSLuis R. Rodriguez return false; 2923f2355cbSLuis R. Rodriguez if (unlikely(last_request->country_ie_checksum != checksum)) 2933f2355cbSLuis R. Rodriguez return true; 2943f2355cbSLuis R. Rodriguez return false; 2953f2355cbSLuis R. Rodriguez } 2963f2355cbSLuis R. Rodriguez 2973b377ea9SJohn W. Linville static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, 2983b377ea9SJohn W. Linville const struct ieee80211_regdomain *src_regd) 2993b377ea9SJohn W. Linville { 3003b377ea9SJohn W. Linville struct ieee80211_regdomain *regd; 3013b377ea9SJohn W. Linville int size_of_regd = 0; 3023b377ea9SJohn W. Linville unsigned int i; 3033b377ea9SJohn W. Linville 3043b377ea9SJohn W. Linville size_of_regd = sizeof(struct ieee80211_regdomain) + 3053b377ea9SJohn W. Linville ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); 3063b377ea9SJohn W. Linville 3073b377ea9SJohn W. Linville regd = kzalloc(size_of_regd, GFP_KERNEL); 3083b377ea9SJohn W. Linville if (!regd) 3093b377ea9SJohn W. Linville return -ENOMEM; 3103b377ea9SJohn W. Linville 3113b377ea9SJohn W. Linville memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 3123b377ea9SJohn W. Linville 3133b377ea9SJohn W. Linville for (i = 0; i < src_regd->n_reg_rules; i++) 3143b377ea9SJohn W. Linville memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 3153b377ea9SJohn W. Linville sizeof(struct ieee80211_reg_rule)); 3163b377ea9SJohn W. Linville 3173b377ea9SJohn W. Linville *dst_regd = regd; 3183b377ea9SJohn W. Linville return 0; 3193b377ea9SJohn W. Linville } 3203b377ea9SJohn W. Linville 3213b377ea9SJohn W. Linville #ifdef CONFIG_CFG80211_INTERNAL_REGDB 3223b377ea9SJohn W. Linville struct reg_regdb_search_request { 3233b377ea9SJohn W. Linville char alpha2[2]; 3243b377ea9SJohn W. Linville struct list_head list; 3253b377ea9SJohn W. Linville }; 3263b377ea9SJohn W. Linville 3273b377ea9SJohn W. Linville static LIST_HEAD(reg_regdb_search_list); 328368d06f5SJohn W. Linville static DEFINE_MUTEX(reg_regdb_search_mutex); 3293b377ea9SJohn W. Linville 3303b377ea9SJohn W. Linville static void reg_regdb_search(struct work_struct *work) 3313b377ea9SJohn W. Linville { 3323b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 3333b377ea9SJohn W. Linville const struct ieee80211_regdomain *curdom, *regdom; 3343b377ea9SJohn W. Linville int i, r; 3353b377ea9SJohn W. Linville 336368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 3373b377ea9SJohn W. Linville while (!list_empty(®_regdb_search_list)) { 3383b377ea9SJohn W. Linville request = list_first_entry(®_regdb_search_list, 3393b377ea9SJohn W. Linville struct reg_regdb_search_request, 3403b377ea9SJohn W. Linville list); 3413b377ea9SJohn W. Linville list_del(&request->list); 3423b377ea9SJohn W. Linville 3433b377ea9SJohn W. Linville for (i=0; i<reg_regdb_size; i++) { 3443b377ea9SJohn W. Linville curdom = reg_regdb[i]; 3453b377ea9SJohn W. Linville 3463b377ea9SJohn W. Linville if (!memcmp(request->alpha2, curdom->alpha2, 2)) { 3473b377ea9SJohn W. Linville r = reg_copy_regd(®dom, curdom); 3483b377ea9SJohn W. Linville if (r) 3493b377ea9SJohn W. Linville break; 3503b377ea9SJohn W. Linville mutex_lock(&cfg80211_mutex); 3513b377ea9SJohn W. Linville set_regdom(regdom); 3523b377ea9SJohn W. Linville mutex_unlock(&cfg80211_mutex); 3533b377ea9SJohn W. Linville break; 3543b377ea9SJohn W. Linville } 3553b377ea9SJohn W. Linville } 3563b377ea9SJohn W. Linville 3573b377ea9SJohn W. Linville kfree(request); 3583b377ea9SJohn W. Linville } 359368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 3603b377ea9SJohn W. Linville } 3613b377ea9SJohn W. Linville 3623b377ea9SJohn W. Linville static DECLARE_WORK(reg_regdb_work, reg_regdb_search); 3633b377ea9SJohn W. Linville 3643b377ea9SJohn W. Linville static void reg_regdb_query(const char *alpha2) 3653b377ea9SJohn W. Linville { 3663b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 3673b377ea9SJohn W. Linville 3683b377ea9SJohn W. Linville if (!alpha2) 3693b377ea9SJohn W. Linville return; 3703b377ea9SJohn W. Linville 3713b377ea9SJohn W. Linville request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); 3723b377ea9SJohn W. Linville if (!request) 3733b377ea9SJohn W. Linville return; 3743b377ea9SJohn W. Linville 3753b377ea9SJohn W. Linville memcpy(request->alpha2, alpha2, 2); 3763b377ea9SJohn W. Linville 377368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 3783b377ea9SJohn W. Linville list_add_tail(&request->list, ®_regdb_search_list); 379368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 3803b377ea9SJohn W. Linville 3813b377ea9SJohn W. Linville schedule_work(®_regdb_work); 3823b377ea9SJohn W. Linville } 3833b377ea9SJohn W. Linville #else 3843b377ea9SJohn W. Linville static inline void reg_regdb_query(const char *alpha2) {} 3853b377ea9SJohn W. Linville #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ 3863b377ea9SJohn W. Linville 387fb1fc7adSLuis R. Rodriguez /* 388fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 389fb1fc7adSLuis R. Rodriguez * basis in userspace. 390fb1fc7adSLuis R. Rodriguez */ 391b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 392b2e1b302SLuis R. Rodriguez { 393b2e1b302SLuis R. Rodriguez char country_env[9 + 2] = "COUNTRY="; 394b2e1b302SLuis R. Rodriguez char *envp[] = { 395b2e1b302SLuis R. Rodriguez country_env, 396b2e1b302SLuis R. Rodriguez NULL 3978318d78aSJohannes Berg }; 3988318d78aSJohannes Berg 399b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 400b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", 401b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 402b2e1b302SLuis R. Rodriguez else 403b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA to update world " 404b2e1b302SLuis R. Rodriguez "regulatory domain\n"); 4058318d78aSJohannes Berg 4063b377ea9SJohn W. Linville /* query internal regulatory database (if it exists) */ 4073b377ea9SJohn W. Linville reg_regdb_query(alpha2); 4083b377ea9SJohn W. Linville 409b2e1b302SLuis R. Rodriguez country_env[8] = alpha2[0]; 410b2e1b302SLuis R. Rodriguez country_env[9] = alpha2[1]; 4118318d78aSJohannes Berg 412b2e1b302SLuis R. Rodriguez return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); 413b2e1b302SLuis R. Rodriguez } 414b2e1b302SLuis R. Rodriguez 415b2e1b302SLuis R. Rodriguez /* Used by nl80211 before kmalloc'ing our regulatory domain */ 416a3d2eaf0SJohannes Berg bool reg_is_valid_request(const char *alpha2) 417b2e1b302SLuis R. Rodriguez { 41861405e97SLuis R. Rodriguez assert_cfg80211_lock(); 41961405e97SLuis R. Rodriguez 420f6037d09SJohannes Berg if (!last_request) 421f6037d09SJohannes Berg return false; 422f6037d09SJohannes Berg 423f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 424b2e1b302SLuis R. Rodriguez } 425b2e1b302SLuis R. Rodriguez 426b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 427a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 428b2e1b302SLuis R. Rodriguez { 429a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 430b2e1b302SLuis R. Rodriguez u32 freq_diff; 431b2e1b302SLuis R. Rodriguez 43291e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 433b2e1b302SLuis R. Rodriguez return false; 434b2e1b302SLuis R. Rodriguez 435b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 436b2e1b302SLuis R. Rodriguez return false; 437b2e1b302SLuis R. Rodriguez 438b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 439b2e1b302SLuis R. Rodriguez 440bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 441bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 442b2e1b302SLuis R. Rodriguez return false; 443b2e1b302SLuis R. Rodriguez 444b2e1b302SLuis R. Rodriguez return true; 445b2e1b302SLuis R. Rodriguez } 446b2e1b302SLuis R. Rodriguez 447a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 448b2e1b302SLuis R. Rodriguez { 449a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 450b2e1b302SLuis R. Rodriguez unsigned int i; 451b2e1b302SLuis R. Rodriguez 452b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 453b2e1b302SLuis R. Rodriguez return false; 454b2e1b302SLuis R. Rodriguez 45588dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 45688dc1c3fSLuis R. Rodriguez return false; 45788dc1c3fSLuis R. Rodriguez 458b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 459b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 460b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 461b2e1b302SLuis R. Rodriguez return false; 462b2e1b302SLuis R. Rodriguez } 463b2e1b302SLuis R. Rodriguez 464b2e1b302SLuis R. Rodriguez return true; 465b2e1b302SLuis R. Rodriguez } 466b2e1b302SLuis R. Rodriguez 467038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 468038659e7SLuis R. Rodriguez u32 center_freq_khz, 469038659e7SLuis R. Rodriguez u32 bw_khz) 470b2e1b302SLuis R. Rodriguez { 471038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 472038659e7SLuis R. Rodriguez 473038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 474038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 475038659e7SLuis R. Rodriguez 476b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 477b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 478038659e7SLuis R. Rodriguez return true; 479038659e7SLuis R. Rodriguez 480038659e7SLuis R. Rodriguez return false; 481b2e1b302SLuis R. Rodriguez } 482b2e1b302SLuis R. Rodriguez 4830c7dc45dSLuis R. Rodriguez /** 4840c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 4850c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 4860c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 4870c7dc45dSLuis R. Rodriguez * 4880c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 4890c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 4900c7dc45dSLuis R. Rodriguez * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is 4910c7dc45dSLuis R. Rodriguez * safe for now to assume that a frequency rule should not be part of a 4920c7dc45dSLuis R. Rodriguez * frequency's band if the start freq or end freq are off by more than 2 GHz. 4930c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 4940c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 4950c7dc45dSLuis R. Rodriguez **/ 4960c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 4970c7dc45dSLuis R. Rodriguez u32 freq_khz) 4980c7dc45dSLuis R. Rodriguez { 4990c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 5000c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 5010c7dc45dSLuis R. Rodriguez return true; 5020c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 5030c7dc45dSLuis R. Rodriguez return true; 5040c7dc45dSLuis R. Rodriguez return false; 5050c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 5060c7dc45dSLuis R. Rodriguez } 5070c7dc45dSLuis R. Rodriguez 508fb1fc7adSLuis R. Rodriguez /* 50984920e3eSLuis R. Rodriguez * This is a work around for sanity checking ieee80211_channel_to_frequency()'s 51084920e3eSLuis R. Rodriguez * work. ieee80211_channel_to_frequency() can for example currently provide a 51184920e3eSLuis R. Rodriguez * 2 GHz channel when in fact a 5 GHz channel was desired. An example would be 51284920e3eSLuis R. Rodriguez * an AP providing channel 8 on a country IE triplet when it sent this on the 51384920e3eSLuis R. Rodriguez * 5 GHz band, that channel is designed to be channel 8 on 5 GHz, not a 2 GHz 51484920e3eSLuis R. Rodriguez * channel. 51584920e3eSLuis R. Rodriguez * 51684920e3eSLuis R. Rodriguez * This can be removed once ieee80211_channel_to_frequency() takes in a band. 51784920e3eSLuis R. Rodriguez */ 51884920e3eSLuis R. Rodriguez static bool chan_in_band(int chan, enum ieee80211_band band) 51984920e3eSLuis R. Rodriguez { 52084920e3eSLuis R. Rodriguez int center_freq = ieee80211_channel_to_frequency(chan); 52184920e3eSLuis R. Rodriguez 52284920e3eSLuis R. Rodriguez switch (band) { 52384920e3eSLuis R. Rodriguez case IEEE80211_BAND_2GHZ: 52484920e3eSLuis R. Rodriguez if (center_freq <= 2484) 52584920e3eSLuis R. Rodriguez return true; 52684920e3eSLuis R. Rodriguez return false; 52784920e3eSLuis R. Rodriguez case IEEE80211_BAND_5GHZ: 52884920e3eSLuis R. Rodriguez if (center_freq >= 5005) 52984920e3eSLuis R. Rodriguez return true; 53084920e3eSLuis R. Rodriguez return false; 53184920e3eSLuis R. Rodriguez default: 53284920e3eSLuis R. Rodriguez return false; 53384920e3eSLuis R. Rodriguez } 53484920e3eSLuis R. Rodriguez } 53584920e3eSLuis R. Rodriguez 53684920e3eSLuis R. Rodriguez /* 537cc5d8a37SLuis R. Rodriguez * Some APs may send a country IE triplet for each channel they 538cc5d8a37SLuis R. Rodriguez * support and while this is completely overkill and silly we still 539cc5d8a37SLuis R. Rodriguez * need to support it. We avoid making a single rule for each channel 540cc5d8a37SLuis R. Rodriguez * though and to help us with this we use this helper to find the 541cc5d8a37SLuis R. Rodriguez * actual subband end channel. These type of country IE triplet 542cc5d8a37SLuis R. Rodriguez * scenerios are handled then, all yielding two regulaotry rules from 543cc5d8a37SLuis R. Rodriguez * parsing a country IE: 544cc5d8a37SLuis R. Rodriguez * 545cc5d8a37SLuis R. Rodriguez * [1] 546cc5d8a37SLuis R. Rodriguez * [2] 547cc5d8a37SLuis R. Rodriguez * [36] 548cc5d8a37SLuis R. Rodriguez * [40] 549cc5d8a37SLuis R. Rodriguez * 550cc5d8a37SLuis R. Rodriguez * [1] 551cc5d8a37SLuis R. Rodriguez * [2-4] 552cc5d8a37SLuis R. Rodriguez * [5-12] 553cc5d8a37SLuis R. Rodriguez * [36] 554cc5d8a37SLuis R. Rodriguez * [40-44] 555cc5d8a37SLuis R. Rodriguez * 556cc5d8a37SLuis R. Rodriguez * [1-4] 557cc5d8a37SLuis R. Rodriguez * [5-7] 558cc5d8a37SLuis R. Rodriguez * [36-44] 559cc5d8a37SLuis R. Rodriguez * [48-64] 560cc5d8a37SLuis R. Rodriguez * 561cc5d8a37SLuis R. Rodriguez * [36-36] 562cc5d8a37SLuis R. Rodriguez * [40-40] 563cc5d8a37SLuis R. Rodriguez * [44-44] 564cc5d8a37SLuis R. Rodriguez * [48-48] 565cc5d8a37SLuis R. Rodriguez * [52-52] 566cc5d8a37SLuis R. Rodriguez * [56-56] 567cc5d8a37SLuis R. Rodriguez * [60-60] 568cc5d8a37SLuis R. Rodriguez * [64-64] 569cc5d8a37SLuis R. Rodriguez * [100-100] 570cc5d8a37SLuis R. Rodriguez * [104-104] 571cc5d8a37SLuis R. Rodriguez * [108-108] 572cc5d8a37SLuis R. Rodriguez * [112-112] 573cc5d8a37SLuis R. Rodriguez * [116-116] 574cc5d8a37SLuis R. Rodriguez * [120-120] 575cc5d8a37SLuis R. Rodriguez * [124-124] 576cc5d8a37SLuis R. Rodriguez * [128-128] 577cc5d8a37SLuis R. Rodriguez * [132-132] 578cc5d8a37SLuis R. Rodriguez * [136-136] 579cc5d8a37SLuis R. Rodriguez * [140-140] 580cc5d8a37SLuis R. Rodriguez * 581cc5d8a37SLuis R. Rodriguez * Returns 0 if the IE has been found to be invalid in the middle 582cc5d8a37SLuis R. Rodriguez * somewhere. 583cc5d8a37SLuis R. Rodriguez */ 58484920e3eSLuis R. Rodriguez static int max_subband_chan(enum ieee80211_band band, 58584920e3eSLuis R. Rodriguez int orig_cur_chan, 586cc5d8a37SLuis R. Rodriguez int orig_end_channel, 587cc5d8a37SLuis R. Rodriguez s8 orig_max_power, 588cc5d8a37SLuis R. Rodriguez u8 **country_ie, 589cc5d8a37SLuis R. Rodriguez u8 *country_ie_len) 590cc5d8a37SLuis R. Rodriguez { 591cc5d8a37SLuis R. Rodriguez u8 *triplets_start = *country_ie; 592cc5d8a37SLuis R. Rodriguez u8 len_at_triplet = *country_ie_len; 593cc5d8a37SLuis R. Rodriguez int end_subband_chan = orig_end_channel; 594cc5d8a37SLuis R. Rodriguez 595cc5d8a37SLuis R. Rodriguez /* 596cc5d8a37SLuis R. Rodriguez * We'll deal with padding for the caller unless 597cc5d8a37SLuis R. Rodriguez * its not immediate and we don't process any channels 598cc5d8a37SLuis R. Rodriguez */ 599cc5d8a37SLuis R. Rodriguez if (*country_ie_len == 1) { 600cc5d8a37SLuis R. Rodriguez *country_ie += 1; 601cc5d8a37SLuis R. Rodriguez *country_ie_len -= 1; 602cc5d8a37SLuis R. Rodriguez return orig_end_channel; 603cc5d8a37SLuis R. Rodriguez } 604cc5d8a37SLuis R. Rodriguez 605cc5d8a37SLuis R. Rodriguez /* Move to the next triplet and then start search */ 606cc5d8a37SLuis R. Rodriguez *country_ie += 3; 607cc5d8a37SLuis R. Rodriguez *country_ie_len -= 3; 608cc5d8a37SLuis R. Rodriguez 60984920e3eSLuis R. Rodriguez if (!chan_in_band(orig_cur_chan, band)) 61084920e3eSLuis R. Rodriguez return 0; 611cc5d8a37SLuis R. Rodriguez 612cc5d8a37SLuis R. Rodriguez while (*country_ie_len >= 3) { 613cc5d8a37SLuis R. Rodriguez int end_channel = 0; 614cc5d8a37SLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 615cc5d8a37SLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) *country_ie; 616cc5d8a37SLuis R. Rodriguez int cur_channel = 0, next_expected_chan; 617cc5d8a37SLuis R. Rodriguez 618cc5d8a37SLuis R. Rodriguez /* means last triplet is completely unrelated to this one */ 619cc5d8a37SLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 620cc5d8a37SLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 621cc5d8a37SLuis R. Rodriguez *country_ie -= 3; 622cc5d8a37SLuis R. Rodriguez *country_ie_len += 3; 623cc5d8a37SLuis R. Rodriguez break; 624cc5d8a37SLuis R. Rodriguez } 625cc5d8a37SLuis R. Rodriguez 626cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel == 0) { 627cc5d8a37SLuis R. Rodriguez *country_ie += 1; 628cc5d8a37SLuis R. Rodriguez *country_ie_len -= 1; 629cc5d8a37SLuis R. Rodriguez if (*country_ie_len != 0) 630cc5d8a37SLuis R. Rodriguez return 0; 631cc5d8a37SLuis R. Rodriguez break; 632cc5d8a37SLuis R. Rodriguez } 633cc5d8a37SLuis R. Rodriguez 634a0f2e0fcSLuis R. Rodriguez if (triplet->chans.num_channels == 0) 635a0f2e0fcSLuis R. Rodriguez return 0; 636a0f2e0fcSLuis R. Rodriguez 637cc5d8a37SLuis R. Rodriguez /* Monitonically increasing channel order */ 638cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel <= end_subband_chan) 639cc5d8a37SLuis R. Rodriguez return 0; 640cc5d8a37SLuis R. Rodriguez 64184920e3eSLuis R. Rodriguez if (!chan_in_band(triplet->chans.first_channel, band)) 64284920e3eSLuis R. Rodriguez return 0; 64384920e3eSLuis R. Rodriguez 644cc5d8a37SLuis R. Rodriguez /* 2 GHz */ 645cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel <= 14) { 646cc5d8a37SLuis R. Rodriguez end_channel = triplet->chans.first_channel + 647cc5d8a37SLuis R. Rodriguez triplet->chans.num_channels - 1; 648cc5d8a37SLuis R. Rodriguez } 649cc5d8a37SLuis R. Rodriguez else { 650cc5d8a37SLuis R. Rodriguez end_channel = triplet->chans.first_channel + 651cc5d8a37SLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 652cc5d8a37SLuis R. Rodriguez } 653cc5d8a37SLuis R. Rodriguez 65484920e3eSLuis R. Rodriguez if (!chan_in_band(end_channel, band)) 65584920e3eSLuis R. Rodriguez return 0; 656cc5d8a37SLuis R. Rodriguez 657cc5d8a37SLuis R. Rodriguez if (orig_max_power != triplet->chans.max_power) { 658cc5d8a37SLuis R. Rodriguez *country_ie -= 3; 659cc5d8a37SLuis R. Rodriguez *country_ie_len += 3; 660cc5d8a37SLuis R. Rodriguez break; 661cc5d8a37SLuis R. Rodriguez } 662cc5d8a37SLuis R. Rodriguez 663cc5d8a37SLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 664cc5d8a37SLuis R. Rodriguez 665cc5d8a37SLuis R. Rodriguez /* The key is finding the right next expected channel */ 666cc5d8a37SLuis R. Rodriguez if (band == IEEE80211_BAND_2GHZ) 667cc5d8a37SLuis R. Rodriguez next_expected_chan = end_subband_chan + 1; 668cc5d8a37SLuis R. Rodriguez else 669cc5d8a37SLuis R. Rodriguez next_expected_chan = end_subband_chan + 4; 670cc5d8a37SLuis R. Rodriguez 671cc5d8a37SLuis R. Rodriguez if (cur_channel != next_expected_chan) { 672cc5d8a37SLuis R. Rodriguez *country_ie -= 3; 673cc5d8a37SLuis R. Rodriguez *country_ie_len += 3; 674cc5d8a37SLuis R. Rodriguez break; 675cc5d8a37SLuis R. Rodriguez } 676cc5d8a37SLuis R. Rodriguez 677cc5d8a37SLuis R. Rodriguez end_subband_chan = end_channel; 678cc5d8a37SLuis R. Rodriguez 679cc5d8a37SLuis R. Rodriguez /* Move to the next one */ 680cc5d8a37SLuis R. Rodriguez *country_ie += 3; 681cc5d8a37SLuis R. Rodriguez *country_ie_len -= 3; 682cc5d8a37SLuis R. Rodriguez 683cc5d8a37SLuis R. Rodriguez /* 684cc5d8a37SLuis R. Rodriguez * Padding needs to be dealt with if we processed 685cc5d8a37SLuis R. Rodriguez * some channels. 686cc5d8a37SLuis R. Rodriguez */ 687cc5d8a37SLuis R. Rodriguez if (*country_ie_len == 1) { 688cc5d8a37SLuis R. Rodriguez *country_ie += 1; 689cc5d8a37SLuis R. Rodriguez *country_ie_len -= 1; 690cc5d8a37SLuis R. Rodriguez break; 691cc5d8a37SLuis R. Rodriguez } 692cc5d8a37SLuis R. Rodriguez 693cc5d8a37SLuis R. Rodriguez /* If seen, the IE is invalid */ 694cc5d8a37SLuis R. Rodriguez if (*country_ie_len == 2) 695cc5d8a37SLuis R. Rodriguez return 0; 696cc5d8a37SLuis R. Rodriguez } 697cc5d8a37SLuis R. Rodriguez 698cc5d8a37SLuis R. Rodriguez if (end_subband_chan == orig_end_channel) { 699cc5d8a37SLuis R. Rodriguez *country_ie = triplets_start; 700cc5d8a37SLuis R. Rodriguez *country_ie_len = len_at_triplet; 701cc5d8a37SLuis R. Rodriguez return orig_end_channel; 702cc5d8a37SLuis R. Rodriguez } 703cc5d8a37SLuis R. Rodriguez 704cc5d8a37SLuis R. Rodriguez return end_subband_chan; 705cc5d8a37SLuis R. Rodriguez } 706cc5d8a37SLuis R. Rodriguez 707cc5d8a37SLuis R. Rodriguez /* 708fb1fc7adSLuis R. Rodriguez * Converts a country IE to a regulatory domain. A regulatory domain 7093f2355cbSLuis R. Rodriguez * structure has a lot of information which the IE doesn't yet have, 7103f2355cbSLuis R. Rodriguez * so for the other values we use upper max values as we will intersect 711fb1fc7adSLuis R. Rodriguez * with our userspace regulatory agent to get lower bounds. 712fb1fc7adSLuis R. Rodriguez */ 7133f2355cbSLuis R. Rodriguez static struct ieee80211_regdomain *country_ie_2_rd( 71484920e3eSLuis R. Rodriguez enum ieee80211_band band, 7153f2355cbSLuis R. Rodriguez u8 *country_ie, 7163f2355cbSLuis R. Rodriguez u8 country_ie_len, 7173f2355cbSLuis R. Rodriguez u32 *checksum) 7183f2355cbSLuis R. Rodriguez { 7193f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 7203f2355cbSLuis R. Rodriguez unsigned int i = 0; 7213f2355cbSLuis R. Rodriguez char alpha2[2]; 7223f2355cbSLuis R. Rodriguez u32 flags = 0; 7233f2355cbSLuis R. Rodriguez u32 num_rules = 0, size_of_regd = 0; 7243f2355cbSLuis R. Rodriguez u8 *triplets_start = NULL; 7253f2355cbSLuis R. Rodriguez u8 len_at_triplet = 0; 7263f2355cbSLuis R. Rodriguez /* the last channel we have registered in a subband (triplet) */ 7273f2355cbSLuis R. Rodriguez int last_sub_max_channel = 0; 7283f2355cbSLuis R. Rodriguez 7293f2355cbSLuis R. Rodriguez *checksum = 0xDEADBEEF; 7303f2355cbSLuis R. Rodriguez 7313f2355cbSLuis R. Rodriguez /* Country IE requirements */ 7323f2355cbSLuis R. Rodriguez BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || 7333f2355cbSLuis R. Rodriguez country_ie_len & 0x01); 7343f2355cbSLuis R. Rodriguez 7353f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 7363f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 7373f2355cbSLuis R. Rodriguez 7383f2355cbSLuis R. Rodriguez /* 7393f2355cbSLuis R. Rodriguez * Third octet can be: 7403f2355cbSLuis R. Rodriguez * 'I' - Indoor 7413f2355cbSLuis R. Rodriguez * 'O' - Outdoor 7423f2355cbSLuis R. Rodriguez * 7433f2355cbSLuis R. Rodriguez * anything else we assume is no restrictions 7443f2355cbSLuis R. Rodriguez */ 7453f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 7463f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_OUTDOOR; 7473f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 7483f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_INDOOR; 7493f2355cbSLuis R. Rodriguez 7503f2355cbSLuis R. Rodriguez country_ie += 3; 7513f2355cbSLuis R. Rodriguez country_ie_len -= 3; 7523f2355cbSLuis R. Rodriguez 7533f2355cbSLuis R. Rodriguez triplets_start = country_ie; 7543f2355cbSLuis R. Rodriguez len_at_triplet = country_ie_len; 7553f2355cbSLuis R. Rodriguez 7563f2355cbSLuis R. Rodriguez *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); 7573f2355cbSLuis R. Rodriguez 758fb1fc7adSLuis R. Rodriguez /* 759fb1fc7adSLuis R. Rodriguez * We need to build a reg rule for each triplet, but first we must 7603f2355cbSLuis R. Rodriguez * calculate the number of reg rules we will need. We will need one 761fb1fc7adSLuis R. Rodriguez * for each channel subband 762fb1fc7adSLuis R. Rodriguez */ 7633f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 764615aab4bSLuis R. Rodriguez int end_channel = 0; 7653f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 7663f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 7673f2355cbSLuis R. Rodriguez int cur_sub_max_channel = 0, cur_channel = 0; 7683f2355cbSLuis R. Rodriguez 7693f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 7703f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 7713f2355cbSLuis R. Rodriguez country_ie += 3; 7723f2355cbSLuis R. Rodriguez country_ie_len -= 3; 7733f2355cbSLuis R. Rodriguez continue; 7743f2355cbSLuis R. Rodriguez } 7753f2355cbSLuis R. Rodriguez 776cc5d8a37SLuis R. Rodriguez /* 777cc5d8a37SLuis R. Rodriguez * APs can add padding to make length divisible 778cc5d8a37SLuis R. Rodriguez * by two, required by the spec. 779cc5d8a37SLuis R. Rodriguez */ 780cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel == 0) { 781cc5d8a37SLuis R. Rodriguez country_ie++; 782cc5d8a37SLuis R. Rodriguez country_ie_len--; 783cc5d8a37SLuis R. Rodriguez /* This is expected to be at the very end only */ 784cc5d8a37SLuis R. Rodriguez if (country_ie_len != 0) 785cc5d8a37SLuis R. Rodriguez return NULL; 786cc5d8a37SLuis R. Rodriguez break; 787cc5d8a37SLuis R. Rodriguez } 788cc5d8a37SLuis R. Rodriguez 789a0f2e0fcSLuis R. Rodriguez if (triplet->chans.num_channels == 0) 790a0f2e0fcSLuis R. Rodriguez return NULL; 791a0f2e0fcSLuis R. Rodriguez 79284920e3eSLuis R. Rodriguez if (!chan_in_band(triplet->chans.first_channel, band)) 79384920e3eSLuis R. Rodriguez return NULL; 79484920e3eSLuis R. Rodriguez 795615aab4bSLuis R. Rodriguez /* 2 GHz */ 79684920e3eSLuis R. Rodriguez if (band == IEEE80211_BAND_2GHZ) 797615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 798e99c7cd5SLuis R. Rodriguez triplet->chans.num_channels - 1; 799615aab4bSLuis R. Rodriguez else 800615aab4bSLuis R. Rodriguez /* 801615aab4bSLuis R. Rodriguez * 5 GHz -- For example in country IEs if the first 802615aab4bSLuis R. Rodriguez * channel given is 36 and the number of channels is 4 803615aab4bSLuis R. Rodriguez * then the individual channel numbers defined for the 804615aab4bSLuis R. Rodriguez * 5 GHz PHY by these parameters are: 36, 40, 44, and 48 805615aab4bSLuis R. Rodriguez * and not 36, 37, 38, 39. 806615aab4bSLuis R. Rodriguez * 807615aab4bSLuis R. Rodriguez * See: http://tinyurl.com/11d-clarification 808615aab4bSLuis R. Rodriguez */ 809615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 810615aab4bSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 811615aab4bSLuis R. Rodriguez 8123f2355cbSLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 813cc5d8a37SLuis R. Rodriguez 814cc5d8a37SLuis R. Rodriguez /* 815cc5d8a37SLuis R. Rodriguez * Enhancement for APs that send a triplet for every channel 816cc5d8a37SLuis R. Rodriguez * or for whatever reason sends triplets with multiple channels 817cc5d8a37SLuis R. Rodriguez * separated when in fact they should be together. 818cc5d8a37SLuis R. Rodriguez */ 81984920e3eSLuis R. Rodriguez end_channel = max_subband_chan(band, 82084920e3eSLuis R. Rodriguez cur_channel, 821cc5d8a37SLuis R. Rodriguez end_channel, 822cc5d8a37SLuis R. Rodriguez triplet->chans.max_power, 823cc5d8a37SLuis R. Rodriguez &country_ie, 824cc5d8a37SLuis R. Rodriguez &country_ie_len); 825cc5d8a37SLuis R. Rodriguez if (!end_channel) 826cc5d8a37SLuis R. Rodriguez return NULL; 827cc5d8a37SLuis R. Rodriguez 82884920e3eSLuis R. Rodriguez if (!chan_in_band(end_channel, band)) 82984920e3eSLuis R. Rodriguez return NULL; 83084920e3eSLuis R. Rodriguez 831615aab4bSLuis R. Rodriguez cur_sub_max_channel = end_channel; 8323f2355cbSLuis R. Rodriguez 8333f2355cbSLuis R. Rodriguez /* Basic sanity check */ 8343f2355cbSLuis R. Rodriguez if (cur_sub_max_channel < cur_channel) 8353f2355cbSLuis R. Rodriguez return NULL; 8363f2355cbSLuis R. Rodriguez 837fb1fc7adSLuis R. Rodriguez /* 838fb1fc7adSLuis R. Rodriguez * Do not allow overlapping channels. Also channels 8393f2355cbSLuis R. Rodriguez * passed in each subband must be monotonically 840fb1fc7adSLuis R. Rodriguez * increasing 841fb1fc7adSLuis R. Rodriguez */ 8423f2355cbSLuis R. Rodriguez if (last_sub_max_channel) { 8433f2355cbSLuis R. Rodriguez if (cur_channel <= last_sub_max_channel) 8443f2355cbSLuis R. Rodriguez return NULL; 8453f2355cbSLuis R. Rodriguez if (cur_sub_max_channel <= last_sub_max_channel) 8463f2355cbSLuis R. Rodriguez return NULL; 8473f2355cbSLuis R. Rodriguez } 8483f2355cbSLuis R. Rodriguez 849fb1fc7adSLuis R. Rodriguez /* 850fb1fc7adSLuis R. Rodriguez * When dot11RegulatoryClassesRequired is supported 8513f2355cbSLuis R. Rodriguez * we can throw ext triplets as part of this soup, 8523f2355cbSLuis R. Rodriguez * for now we don't care when those change as we 853fb1fc7adSLuis R. Rodriguez * don't support them 854fb1fc7adSLuis R. Rodriguez */ 8553f2355cbSLuis R. Rodriguez *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | 8563f2355cbSLuis R. Rodriguez ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | 8573f2355cbSLuis R. Rodriguez ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); 8583f2355cbSLuis R. Rodriguez 8593f2355cbSLuis R. Rodriguez last_sub_max_channel = cur_sub_max_channel; 8603f2355cbSLuis R. Rodriguez 861cc5d8a37SLuis R. Rodriguez num_rules++; 862cc5d8a37SLuis R. Rodriguez 863cc5d8a37SLuis R. Rodriguez if (country_ie_len >= 3) { 8643f2355cbSLuis R. Rodriguez country_ie += 3; 8653f2355cbSLuis R. Rodriguez country_ie_len -= 3; 866cc5d8a37SLuis R. Rodriguez } 8673f2355cbSLuis R. Rodriguez 868fb1fc7adSLuis R. Rodriguez /* 869fb1fc7adSLuis R. Rodriguez * Note: this is not a IEEE requirement but 870fb1fc7adSLuis R. Rodriguez * simply a memory requirement 871fb1fc7adSLuis R. Rodriguez */ 8723f2355cbSLuis R. Rodriguez if (num_rules > NL80211_MAX_SUPP_REG_RULES) 8733f2355cbSLuis R. Rodriguez return NULL; 8743f2355cbSLuis R. Rodriguez } 8753f2355cbSLuis R. Rodriguez 8763f2355cbSLuis R. Rodriguez country_ie = triplets_start; 8773f2355cbSLuis R. Rodriguez country_ie_len = len_at_triplet; 8783f2355cbSLuis R. Rodriguez 8793f2355cbSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 8803f2355cbSLuis R. Rodriguez (num_rules * sizeof(struct ieee80211_reg_rule)); 8813f2355cbSLuis R. Rodriguez 8823f2355cbSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 8833f2355cbSLuis R. Rodriguez if (!rd) 8843f2355cbSLuis R. Rodriguez return NULL; 8853f2355cbSLuis R. Rodriguez 8863f2355cbSLuis R. Rodriguez rd->n_reg_rules = num_rules; 8873f2355cbSLuis R. Rodriguez rd->alpha2[0] = alpha2[0]; 8883f2355cbSLuis R. Rodriguez rd->alpha2[1] = alpha2[1]; 8893f2355cbSLuis R. Rodriguez 8903f2355cbSLuis R. Rodriguez /* This time around we fill in the rd */ 8913f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 89202e68a3dSLuis R. Rodriguez int end_channel = 0; 8933f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 8943f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 8953f2355cbSLuis R. Rodriguez struct ieee80211_reg_rule *reg_rule = NULL; 8963f2355cbSLuis R. Rodriguez struct ieee80211_freq_range *freq_range = NULL; 8973f2355cbSLuis R. Rodriguez struct ieee80211_power_rule *power_rule = NULL; 8983f2355cbSLuis R. Rodriguez 899fb1fc7adSLuis R. Rodriguez /* 900fb1fc7adSLuis R. Rodriguez * Must parse if dot11RegulatoryClassesRequired is true, 901fb1fc7adSLuis R. Rodriguez * we don't support this yet 902fb1fc7adSLuis R. Rodriguez */ 9033f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 9043f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 9053f2355cbSLuis R. Rodriguez country_ie += 3; 9063f2355cbSLuis R. Rodriguez country_ie_len -= 3; 9073f2355cbSLuis R. Rodriguez continue; 9083f2355cbSLuis R. Rodriguez } 9093f2355cbSLuis R. Rodriguez 910cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel == 0) { 911cc5d8a37SLuis R. Rodriguez country_ie++; 912cc5d8a37SLuis R. Rodriguez country_ie_len--; 913cc5d8a37SLuis R. Rodriguez break; 914cc5d8a37SLuis R. Rodriguez } 915cc5d8a37SLuis R. Rodriguez 9163f2355cbSLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 9173f2355cbSLuis R. Rodriguez freq_range = ®_rule->freq_range; 9183f2355cbSLuis R. Rodriguez power_rule = ®_rule->power_rule; 9193f2355cbSLuis R. Rodriguez 9203f2355cbSLuis R. Rodriguez reg_rule->flags = flags; 9213f2355cbSLuis R. Rodriguez 92202e68a3dSLuis R. Rodriguez /* 2 GHz */ 92384920e3eSLuis R. Rodriguez if (band == IEEE80211_BAND_2GHZ) 92402e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 925e99c7cd5SLuis R. Rodriguez triplet->chans.num_channels -1; 92602e68a3dSLuis R. Rodriguez else 92702e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 92802e68a3dSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 92902e68a3dSLuis R. Rodriguez 93084920e3eSLuis R. Rodriguez end_channel = max_subband_chan(band, 93184920e3eSLuis R. Rodriguez triplet->chans.first_channel, 932cc5d8a37SLuis R. Rodriguez end_channel, 933cc5d8a37SLuis R. Rodriguez triplet->chans.max_power, 934cc5d8a37SLuis R. Rodriguez &country_ie, 935cc5d8a37SLuis R. Rodriguez &country_ie_len); 936cc5d8a37SLuis R. Rodriguez 937fb1fc7adSLuis R. Rodriguez /* 938fb1fc7adSLuis R. Rodriguez * The +10 is since the regulatory domain expects 9393f2355cbSLuis R. Rodriguez * the actual band edge, not the center of freq for 9403f2355cbSLuis R. Rodriguez * its start and end freqs, assuming 20 MHz bandwidth on 941fb1fc7adSLuis R. Rodriguez * the channels passed 942fb1fc7adSLuis R. Rodriguez */ 9433f2355cbSLuis R. Rodriguez freq_range->start_freq_khz = 9443f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 9453f2355cbSLuis R. Rodriguez triplet->chans.first_channel) - 10); 9463f2355cbSLuis R. Rodriguez freq_range->end_freq_khz = 9473f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 94802e68a3dSLuis R. Rodriguez end_channel) + 10); 9493f2355cbSLuis R. Rodriguez 950fb1fc7adSLuis R. Rodriguez /* 951fb1fc7adSLuis R. Rodriguez * These are large arbitrary values we use to intersect later. 952fb1fc7adSLuis R. Rodriguez * Increment this if we ever support >= 40 MHz channels 953fb1fc7adSLuis R. Rodriguez * in IEEE 802.11 954fb1fc7adSLuis R. Rodriguez */ 9553f2355cbSLuis R. Rodriguez freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); 9563f2355cbSLuis R. Rodriguez power_rule->max_antenna_gain = DBI_TO_MBI(100); 95708030db6SLuis R. Rodriguez power_rule->max_eirp = DBM_TO_MBM(triplet->chans.max_power); 9583f2355cbSLuis R. Rodriguez 959cc5d8a37SLuis R. Rodriguez i++; 960cc5d8a37SLuis R. Rodriguez 961cc5d8a37SLuis R. Rodriguez if (country_ie_len >= 3) { 9623f2355cbSLuis R. Rodriguez country_ie += 3; 9633f2355cbSLuis R. Rodriguez country_ie_len -= 3; 964cc5d8a37SLuis R. Rodriguez } 9653f2355cbSLuis R. Rodriguez 9663f2355cbSLuis R. Rodriguez BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); 9673f2355cbSLuis R. Rodriguez } 9683f2355cbSLuis R. Rodriguez 9693f2355cbSLuis R. Rodriguez return rd; 9703f2355cbSLuis R. Rodriguez } 9713f2355cbSLuis R. Rodriguez 9723f2355cbSLuis R. Rodriguez 973fb1fc7adSLuis R. Rodriguez /* 974fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 975fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 976fb1fc7adSLuis R. Rodriguez */ 9779c96477dSLuis R. Rodriguez static int reg_rules_intersect( 9789c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 9799c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 9809c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 9819c96477dSLuis R. Rodriguez { 9829c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 9839c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 9849c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 9859c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 9869c96477dSLuis R. Rodriguez u32 freq_diff; 9879c96477dSLuis R. Rodriguez 9889c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 9899c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 9909c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 9919c96477dSLuis R. Rodriguez 9929c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 9939c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 9949c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 9959c96477dSLuis R. Rodriguez 9969c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 9979c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 9989c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 9999c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 10009c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 10019c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 10029c96477dSLuis R. Rodriguez 10039c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 10049c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 10059c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 10069c96477dSLuis R. Rodriguez 10079c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 10089c96477dSLuis R. Rodriguez power_rule2->max_eirp); 10099c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 10109c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 10119c96477dSLuis R. Rodriguez 10129c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 10139c96477dSLuis R. Rodriguez 10149c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 10159c96477dSLuis R. Rodriguez return -EINVAL; 10169c96477dSLuis R. Rodriguez 10179c96477dSLuis R. Rodriguez return 0; 10189c96477dSLuis R. Rodriguez } 10199c96477dSLuis R. Rodriguez 10209c96477dSLuis R. Rodriguez /** 10219c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 10229c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 10239c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 10249c96477dSLuis R. Rodriguez * 10259c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 10269c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 10279c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 10289c96477dSLuis R. Rodriguez * 10299c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 10309c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 10319c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 10329c96477dSLuis R. Rodriguez */ 10339c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 10349c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 10359c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 10369c96477dSLuis R. Rodriguez { 10379c96477dSLuis R. Rodriguez int r, size_of_regd; 10389c96477dSLuis R. Rodriguez unsigned int x, y; 10399c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 10409c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 10419c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 10429c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 10439c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 10449c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 10459c96477dSLuis R. Rodriguez 10469c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 10479c96477dSLuis R. Rodriguez intersected_rule = &irule; 10489c96477dSLuis R. Rodriguez 10499c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 10509c96477dSLuis R. Rodriguez 10519c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 10529c96477dSLuis R. Rodriguez return NULL; 10539c96477dSLuis R. Rodriguez 1054fb1fc7adSLuis R. Rodriguez /* 1055fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 10569c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 10579c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 10589c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 1059fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 1060fb1fc7adSLuis R. Rodriguez */ 10619c96477dSLuis R. Rodriguez 10629c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 10639c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 10649c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 10659c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 10669c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 10679c96477dSLuis R. Rodriguez intersected_rule)) 10689c96477dSLuis R. Rodriguez num_rules++; 10699c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 10709c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 10719c96477dSLuis R. Rodriguez } 10729c96477dSLuis R. Rodriguez } 10739c96477dSLuis R. Rodriguez 10749c96477dSLuis R. Rodriguez if (!num_rules) 10759c96477dSLuis R. Rodriguez return NULL; 10769c96477dSLuis R. Rodriguez 10779c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 10789c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 10799c96477dSLuis R. Rodriguez 10809c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 10819c96477dSLuis R. Rodriguez if (!rd) 10829c96477dSLuis R. Rodriguez return NULL; 10839c96477dSLuis R. Rodriguez 10849c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 10859c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 10869c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 10879c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 1088fb1fc7adSLuis R. Rodriguez /* 1089fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 10909c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 1091fb1fc7adSLuis R. Rodriguez * a memcpy() 1092fb1fc7adSLuis R. Rodriguez */ 10939c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 10949c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 10959c96477dSLuis R. Rodriguez intersected_rule); 1096fb1fc7adSLuis R. Rodriguez /* 1097fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 1098fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 1099fb1fc7adSLuis R. Rodriguez */ 11009c96477dSLuis R. Rodriguez if (r) 11019c96477dSLuis R. Rodriguez continue; 11029c96477dSLuis R. Rodriguez rule_idx++; 11039c96477dSLuis R. Rodriguez } 11049c96477dSLuis R. Rodriguez } 11059c96477dSLuis R. Rodriguez 11069c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 11079c96477dSLuis R. Rodriguez kfree(rd); 11089c96477dSLuis R. Rodriguez return NULL; 11099c96477dSLuis R. Rodriguez } 11109c96477dSLuis R. Rodriguez 11119c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 11129c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 11139c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 11149c96477dSLuis R. Rodriguez 11159c96477dSLuis R. Rodriguez return rd; 11169c96477dSLuis R. Rodriguez } 11179c96477dSLuis R. Rodriguez 1118fb1fc7adSLuis R. Rodriguez /* 1119fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 1120fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 1121fb1fc7adSLuis R. Rodriguez */ 1122b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 1123b2e1b302SLuis R. Rodriguez { 1124b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 1125b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 1126b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 1127b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 1128b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 1129b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 1130b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 1131b2e1b302SLuis R. Rodriguez return channel_flags; 1132b2e1b302SLuis R. Rodriguez } 1133b2e1b302SLuis R. Rodriguez 11341fa25e41SLuis R. Rodriguez static int freq_reg_info_regd(struct wiphy *wiphy, 11351fa25e41SLuis R. Rodriguez u32 center_freq, 1136038659e7SLuis R. Rodriguez u32 desired_bw_khz, 11371fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 11381fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *custom_regd) 11398318d78aSJohannes Berg { 11408318d78aSJohannes Berg int i; 11410c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 11423e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *regd; 1143038659e7SLuis R. Rodriguez bool bw_fits = false; 1144038659e7SLuis R. Rodriguez 1145038659e7SLuis R. Rodriguez if (!desired_bw_khz) 1146038659e7SLuis R. Rodriguez desired_bw_khz = MHZ_TO_KHZ(20); 11478318d78aSJohannes Berg 11481fa25e41SLuis R. Rodriguez regd = custom_regd ? custom_regd : cfg80211_regdomain; 11493e0c3ff3SLuis R. Rodriguez 1150fb1fc7adSLuis R. Rodriguez /* 1151fb1fc7adSLuis R. Rodriguez * Follow the driver's regulatory domain, if present, unless a country 1152fb1fc7adSLuis R. Rodriguez * IE has been processed or a user wants to help complaince further 1153fb1fc7adSLuis R. Rodriguez */ 11547db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 11557db90f4aSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_USER && 11563e0c3ff3SLuis R. Rodriguez wiphy->regd) 11573e0c3ff3SLuis R. Rodriguez regd = wiphy->regd; 11583e0c3ff3SLuis R. Rodriguez 11593e0c3ff3SLuis R. Rodriguez if (!regd) 1160b2e1b302SLuis R. Rodriguez return -EINVAL; 1161b2e1b302SLuis R. Rodriguez 11623e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 1163b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 1164b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 1165b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 1166b2e1b302SLuis R. Rodriguez 11673e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 1168b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 1169b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 11700c7dc45dSLuis R. Rodriguez 1171fb1fc7adSLuis R. Rodriguez /* 1172fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 11730c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 1174fb1fc7adSLuis R. Rodriguez * not overwrite it once found 1175fb1fc7adSLuis R. Rodriguez */ 11760c7dc45dSLuis R. Rodriguez if (!band_rule_found) 11770c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 11780c7dc45dSLuis R. Rodriguez 1179038659e7SLuis R. Rodriguez bw_fits = reg_does_bw_fit(fr, 1180038659e7SLuis R. Rodriguez center_freq, 1181038659e7SLuis R. Rodriguez desired_bw_khz); 11820c7dc45dSLuis R. Rodriguez 1183038659e7SLuis R. Rodriguez if (band_rule_found && bw_fits) { 1184b2e1b302SLuis R. Rodriguez *reg_rule = rr; 1185038659e7SLuis R. Rodriguez return 0; 11868318d78aSJohannes Berg } 11878318d78aSJohannes Berg } 11888318d78aSJohannes Berg 11890c7dc45dSLuis R. Rodriguez if (!band_rule_found) 11900c7dc45dSLuis R. Rodriguez return -ERANGE; 11910c7dc45dSLuis R. Rodriguez 1192038659e7SLuis R. Rodriguez return -EINVAL; 1193b2e1b302SLuis R. Rodriguez } 119434f57347SLuis R. Rodriguez EXPORT_SYMBOL(freq_reg_info); 1195b2e1b302SLuis R. Rodriguez 1196038659e7SLuis R. Rodriguez int freq_reg_info(struct wiphy *wiphy, 1197038659e7SLuis R. Rodriguez u32 center_freq, 1198038659e7SLuis R. Rodriguez u32 desired_bw_khz, 11991fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 12001fa25e41SLuis R. Rodriguez { 1201ac46d48eSLuis R. Rodriguez assert_cfg80211_lock(); 1202038659e7SLuis R. Rodriguez return freq_reg_info_regd(wiphy, 1203038659e7SLuis R. Rodriguez center_freq, 1204038659e7SLuis R. Rodriguez desired_bw_khz, 1205038659e7SLuis R. Rodriguez reg_rule, 1206038659e7SLuis R. Rodriguez NULL); 12071fa25e41SLuis R. Rodriguez } 1208b2e1b302SLuis R. Rodriguez 1209038659e7SLuis R. Rodriguez /* 1210038659e7SLuis R. Rodriguez * Note that right now we assume the desired channel bandwidth 1211038659e7SLuis R. Rodriguez * is always 20 MHz for each individual channel (HT40 uses 20 MHz 1212038659e7SLuis R. Rodriguez * per channel, the primary and the extension channel). To support 1213038659e7SLuis R. Rodriguez * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a 1214038659e7SLuis R. Rodriguez * new ieee80211_channel.target_bw and re run the regulatory check 1215038659e7SLuis R. Rodriguez * on the wiphy with the target_bw specified. Then we can simply use 1216038659e7SLuis R. Rodriguez * that below for the desired_bw_khz below. 1217038659e7SLuis R. Rodriguez */ 1218a92a3ce7SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, 1219a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 1220b2e1b302SLuis R. Rodriguez { 1221b2e1b302SLuis R. Rodriguez int r; 1222038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 1223038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 1224b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 1225b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1226038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 1227a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1228a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 1229fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 1230a92a3ce7SLuis R. Rodriguez 1231761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1232761cf7ecSLuis R. Rodriguez 1233806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1234806a9e39SLuis R. Rodriguez 1235a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 1236a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 1237a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1238a92a3ce7SLuis R. Rodriguez 1239a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 1240b2e1b302SLuis R. Rodriguez 1241038659e7SLuis R. Rodriguez r = freq_reg_info(wiphy, 1242038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 1243038659e7SLuis R. Rodriguez desired_bw_khz, 1244038659e7SLuis R. Rodriguez ®_rule); 1245b2e1b302SLuis R. Rodriguez 1246b2e1b302SLuis R. Rodriguez if (r) { 1247fb1fc7adSLuis R. Rodriguez /* 1248fb1fc7adSLuis R. Rodriguez * This means no regulatory rule was found in the country IE 12490c7dc45dSLuis R. Rodriguez * with a frequency range on the center_freq's band, since 12500c7dc45dSLuis R. Rodriguez * IEEE-802.11 allows for a country IE to have a subset of the 12510c7dc45dSLuis R. Rodriguez * regulatory information provided in a country we ignore 12520c7dc45dSLuis R. Rodriguez * disabling the channel unless at least one reg rule was 12530c7dc45dSLuis R. Rodriguez * found on the center_freq's band. For details see this 12540c7dc45dSLuis R. Rodriguez * clarification: 12550c7dc45dSLuis R. Rodriguez * 12560c7dc45dSLuis R. Rodriguez * http://tinyurl.com/11d-clarification 12570c7dc45dSLuis R. Rodriguez */ 12580c7dc45dSLuis R. Rodriguez if (r == -ERANGE && 12597db90f4aSLuis R. Rodriguez last_request->initiator == 12607db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 12614113f751SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Leaving channel %d MHz " 12620c7dc45dSLuis R. Rodriguez "intact on %s - no rule found in band on " 12630c7dc45dSLuis R. Rodriguez "Country IE\n", 12640c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 12650c7dc45dSLuis R. Rodriguez } else { 1266fb1fc7adSLuis R. Rodriguez /* 1267fb1fc7adSLuis R. Rodriguez * In this case we know the country IE has at least one reg rule 1268fb1fc7adSLuis R. Rodriguez * for the band so we respect its band definitions 1269fb1fc7adSLuis R. Rodriguez */ 12707db90f4aSLuis R. Rodriguez if (last_request->initiator == 12717db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) 12724113f751SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Disabling " 12730c7dc45dSLuis R. Rodriguez "channel %d MHz on %s due to " 12740c7dc45dSLuis R. Rodriguez "Country IE\n", 12750c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 12768318d78aSJohannes Berg flags |= IEEE80211_CHAN_DISABLED; 12778318d78aSJohannes Berg chan->flags = flags; 12780c7dc45dSLuis R. Rodriguez } 12798318d78aSJohannes Berg return; 12808318d78aSJohannes Berg } 12818318d78aSJohannes Berg 1282b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1283038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1284038659e7SLuis R. Rodriguez 1285038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1286038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1287b2e1b302SLuis R. Rodriguez 12887db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1289806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 12905be83de5SJohannes Berg request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { 1291fb1fc7adSLuis R. Rodriguez /* 1292fb1fc7adSLuis R. Rodriguez * This gaurantees the driver's requested regulatory domain 1293f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 1294fb1fc7adSLuis R. Rodriguez * settings 1295fb1fc7adSLuis R. Rodriguez */ 1296f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 1297038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 1298f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 1299f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1300f976376dSLuis R. Rodriguez chan->max_power = chan->orig_mpwr = 1301f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 1302f976376dSLuis R. Rodriguez return; 1303f976376dSLuis R. Rodriguez } 1304f976376dSLuis R. Rodriguez 1305038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 13068318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 1307b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 1308253898c4SJohn W. Linville if (chan->orig_mpwr) 1309b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 1310b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 1311253898c4SJohn W. Linville else 1312b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 13138318d78aSJohannes Berg } 13148318d78aSJohannes Berg 1315a92a3ce7SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) 13168318d78aSJohannes Berg { 1317a92a3ce7SLuis R. Rodriguez unsigned int i; 1318a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1319a92a3ce7SLuis R. Rodriguez 1320a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1321a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 13228318d78aSJohannes Berg 13238318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 1324a92a3ce7SLuis R. Rodriguez handle_channel(wiphy, band, i); 13258318d78aSJohannes Berg } 13268318d78aSJohannes Berg 13277db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 13287db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 132914b9815aSLuis R. Rodriguez { 133014b9815aSLuis R. Rodriguez if (!last_request) 133114b9815aSLuis R. Rodriguez return true; 13327db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 13335be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 133414b9815aSLuis R. Rodriguez return true; 1335fb1fc7adSLuis R. Rodriguez /* 1336fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1337fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1338fb1fc7adSLuis R. Rodriguez */ 13395be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && 1340f976376dSLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) 134114b9815aSLuis R. Rodriguez return true; 134214b9815aSLuis R. Rodriguez return false; 134314b9815aSLuis R. Rodriguez } 134414b9815aSLuis R. Rodriguez 13457db90f4aSLuis R. Rodriguez static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 1346b2e1b302SLuis R. Rodriguez { 134779c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1348b2e1b302SLuis R. Rodriguez 134979c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 135079c97e97SJohannes Berg wiphy_update_regulatory(&rdev->wiphy, initiator); 1351b2e1b302SLuis R. Rodriguez } 1352b2e1b302SLuis R. Rodriguez 1353e38f8a7aSLuis R. Rodriguez static void handle_reg_beacon(struct wiphy *wiphy, 1354e38f8a7aSLuis R. Rodriguez unsigned int chan_idx, 1355e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1356e38f8a7aSLuis R. Rodriguez { 1357e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1358e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 13596bad8766SLuis R. Rodriguez bool channel_changed = false; 13606bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1361e38f8a7aSLuis R. Rodriguez 1362e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1363e38f8a7aSLuis R. Rodriguez 1364e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1365e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1366e38f8a7aSLuis R. Rodriguez 1367e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1368e38f8a7aSLuis R. Rodriguez return; 1369e38f8a7aSLuis R. Rodriguez 13706bad8766SLuis R. Rodriguez if (chan->beacon_found) 13716bad8766SLuis R. Rodriguez return; 13726bad8766SLuis R. Rodriguez 13736bad8766SLuis R. Rodriguez chan->beacon_found = true; 13746bad8766SLuis R. Rodriguez 13755be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) 137637184244SLuis R. Rodriguez return; 137737184244SLuis R. Rodriguez 13786bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 13796bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 13806bad8766SLuis R. Rodriguez 138137184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { 1382e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 13836bad8766SLuis R. Rodriguez channel_changed = true; 1384e38f8a7aSLuis R. Rodriguez } 1385e38f8a7aSLuis R. Rodriguez 138637184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IBSS) { 1387e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 13886bad8766SLuis R. Rodriguez channel_changed = true; 1389e38f8a7aSLuis R. Rodriguez } 1390e38f8a7aSLuis R. Rodriguez 13916bad8766SLuis R. Rodriguez if (channel_changed) 13926bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1393e38f8a7aSLuis R. Rodriguez } 1394e38f8a7aSLuis R. Rodriguez 1395e38f8a7aSLuis R. Rodriguez /* 1396e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1397e38f8a7aSLuis R. Rodriguez * new channel 1398e38f8a7aSLuis R. Rodriguez */ 1399e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1400e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1401e38f8a7aSLuis R. Rodriguez { 1402e38f8a7aSLuis R. Rodriguez unsigned int i; 1403e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1404e38f8a7aSLuis R. Rodriguez 1405e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1406e38f8a7aSLuis R. Rodriguez 1407e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1408e38f8a7aSLuis R. Rodriguez return; 1409e38f8a7aSLuis R. Rodriguez 1410e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1411e38f8a7aSLuis R. Rodriguez 1412e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1413e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1414e38f8a7aSLuis R. Rodriguez } 1415e38f8a7aSLuis R. Rodriguez 1416e38f8a7aSLuis R. Rodriguez /* 1417e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1418e38f8a7aSLuis R. Rodriguez */ 1419e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1420e38f8a7aSLuis R. Rodriguez { 1421e38f8a7aSLuis R. Rodriguez unsigned int i; 1422e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1423e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1424e38f8a7aSLuis R. Rodriguez 1425e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1426e38f8a7aSLuis R. Rodriguez 1427e38f8a7aSLuis R. Rodriguez if (list_empty(®_beacon_list)) 1428e38f8a7aSLuis R. Rodriguez return; 1429e38f8a7aSLuis R. Rodriguez 1430e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1431e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1432e38f8a7aSLuis R. Rodriguez continue; 1433e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1434e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1435e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1436e38f8a7aSLuis R. Rodriguez } 1437e38f8a7aSLuis R. Rodriguez } 1438e38f8a7aSLuis R. Rodriguez 1439e38f8a7aSLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 1440e38f8a7aSLuis R. Rodriguez { 1441e38f8a7aSLuis R. Rodriguez if (is_world_regdom(cfg80211_regdomain->alpha2) || 1442e38f8a7aSLuis R. Rodriguez (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) 1443e38f8a7aSLuis R. Rodriguez return true; 1444b1ed8dddSLuis R. Rodriguez if (last_request && 1445b1ed8dddSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 14465be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 1447e38f8a7aSLuis R. Rodriguez return true; 1448e38f8a7aSLuis R. Rodriguez return false; 1449e38f8a7aSLuis R. Rodriguez } 1450e38f8a7aSLuis R. Rodriguez 1451e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1452e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1453e38f8a7aSLuis R. Rodriguez { 1454b1ed8dddSLuis R. Rodriguez /* 1455b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 1456b1ed8dddSLuis R. Rodriguez * have been processed yet. 1457b1ed8dddSLuis R. Rodriguez */ 1458b1ed8dddSLuis R. Rodriguez if (!last_request) 1459b1ed8dddSLuis R. Rodriguez return; 1460e38f8a7aSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 1461e38f8a7aSLuis R. Rodriguez return; 1462e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1463e38f8a7aSLuis R. Rodriguez } 1464e38f8a7aSLuis R. Rodriguez 1465038659e7SLuis R. Rodriguez static bool is_ht40_not_allowed(struct ieee80211_channel *chan) 1466038659e7SLuis R. Rodriguez { 1467038659e7SLuis R. Rodriguez if (!chan) 1468038659e7SLuis R. Rodriguez return true; 1469038659e7SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_DISABLED) 1470038659e7SLuis R. Rodriguez return true; 1471038659e7SLuis R. Rodriguez /* This would happen when regulatory rules disallow HT40 completely */ 1472038659e7SLuis R. Rodriguez if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) 1473038659e7SLuis R. Rodriguez return true; 1474038659e7SLuis R. Rodriguez return false; 1475038659e7SLuis R. Rodriguez } 1476038659e7SLuis R. Rodriguez 1477038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 1478038659e7SLuis R. Rodriguez enum ieee80211_band band, 1479038659e7SLuis R. Rodriguez unsigned int chan_idx) 1480038659e7SLuis R. Rodriguez { 1481038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1482038659e7SLuis R. Rodriguez struct ieee80211_channel *channel; 1483038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 1484038659e7SLuis R. Rodriguez unsigned int i; 1485038659e7SLuis R. Rodriguez 1486038659e7SLuis R. Rodriguez assert_cfg80211_lock(); 1487038659e7SLuis R. Rodriguez 1488038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1489038659e7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 1490038659e7SLuis R. Rodriguez channel = &sband->channels[chan_idx]; 1491038659e7SLuis R. Rodriguez 1492038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel)) { 1493038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 1494038659e7SLuis R. Rodriguez return; 1495038659e7SLuis R. Rodriguez } 1496038659e7SLuis R. Rodriguez 1497038659e7SLuis R. Rodriguez /* 1498038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 1499038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 1500038659e7SLuis R. Rodriguez */ 1501038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 1502038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 1503038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 1504038659e7SLuis R. Rodriguez channel_before = c; 1505038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 1506038659e7SLuis R. Rodriguez channel_after = c; 1507038659e7SLuis R. Rodriguez } 1508038659e7SLuis R. Rodriguez 1509038659e7SLuis R. Rodriguez /* 1510038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 1511038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 1512038659e7SLuis R. Rodriguez * to include that as well. 1513038659e7SLuis R. Rodriguez */ 1514038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_before)) 1515689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 1516038659e7SLuis R. Rodriguez else 1517689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 1518038659e7SLuis R. Rodriguez 1519038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_after)) 1520689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 1521038659e7SLuis R. Rodriguez else 1522689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 1523038659e7SLuis R. Rodriguez } 1524038659e7SLuis R. Rodriguez 1525038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1526038659e7SLuis R. Rodriguez enum ieee80211_band band) 1527038659e7SLuis R. Rodriguez { 1528038659e7SLuis R. Rodriguez unsigned int i; 1529038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1530038659e7SLuis R. Rodriguez 1531038659e7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1532038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1533038659e7SLuis R. Rodriguez 1534038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1535038659e7SLuis R. Rodriguez reg_process_ht_flags_channel(wiphy, band, i); 1536038659e7SLuis R. Rodriguez } 1537038659e7SLuis R. Rodriguez 1538038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1539038659e7SLuis R. Rodriguez { 1540038659e7SLuis R. Rodriguez enum ieee80211_band band; 1541038659e7SLuis R. Rodriguez 1542038659e7SLuis R. Rodriguez if (!wiphy) 1543038659e7SLuis R. Rodriguez return; 1544038659e7SLuis R. Rodriguez 1545038659e7SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1546038659e7SLuis R. Rodriguez if (wiphy->bands[band]) 1547038659e7SLuis R. Rodriguez reg_process_ht_flags_band(wiphy, band); 1548038659e7SLuis R. Rodriguez } 1549038659e7SLuis R. Rodriguez 1550038659e7SLuis R. Rodriguez } 1551038659e7SLuis R. Rodriguez 15527db90f4aSLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, 15537db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 15548318d78aSJohannes Berg { 15558318d78aSJohannes Berg enum ieee80211_band band; 1556d46e5b1dSLuis R. Rodriguez 15577db90f4aSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) 1558e38f8a7aSLuis R. Rodriguez goto out; 1559b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 15608318d78aSJohannes Berg if (wiphy->bands[band]) 1561a92a3ce7SLuis R. Rodriguez handle_band(wiphy, band); 1562b2e1b302SLuis R. Rodriguez } 1563e38f8a7aSLuis R. Rodriguez out: 1564e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1565038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 1566b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1567716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 1568b2e1b302SLuis R. Rodriguez } 1569b2e1b302SLuis R. Rodriguez 15701fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 15711fa25e41SLuis R. Rodriguez enum ieee80211_band band, 15721fa25e41SLuis R. Rodriguez unsigned int chan_idx, 15731fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 15741fa25e41SLuis R. Rodriguez { 15751fa25e41SLuis R. Rodriguez int r; 1576038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 1577038659e7SLuis R. Rodriguez u32 bw_flags = 0; 15781fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 15791fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1580038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 15811fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 15821fa25e41SLuis R. Rodriguez struct ieee80211_channel *chan; 15831fa25e41SLuis R. Rodriguez 1584abc7381bSLuis R. Rodriguez assert_reg_lock(); 1585ac46d48eSLuis R. Rodriguez 15861fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 15871fa25e41SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 15881fa25e41SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 15891fa25e41SLuis R. Rodriguez 1590038659e7SLuis R. Rodriguez r = freq_reg_info_regd(wiphy, 1591038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 1592038659e7SLuis R. Rodriguez desired_bw_khz, 1593038659e7SLuis R. Rodriguez ®_rule, 1594038659e7SLuis R. Rodriguez regd); 15951fa25e41SLuis R. Rodriguez 15961fa25e41SLuis R. Rodriguez if (r) { 15971fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 15981fa25e41SLuis R. Rodriguez return; 15991fa25e41SLuis R. Rodriguez } 16001fa25e41SLuis R. Rodriguez 16011fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1602038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 16031fa25e41SLuis R. Rodriguez 1604038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1605038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1606038659e7SLuis R. Rodriguez 1607038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 16081fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 16091fa25e41SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 16101fa25e41SLuis R. Rodriguez } 16111fa25e41SLuis R. Rodriguez 16121fa25e41SLuis R. Rodriguez static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, 16131fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 16141fa25e41SLuis R. Rodriguez { 16151fa25e41SLuis R. Rodriguez unsigned int i; 16161fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 16171fa25e41SLuis R. Rodriguez 16181fa25e41SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 16191fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 16201fa25e41SLuis R. Rodriguez 16211fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 16221fa25e41SLuis R. Rodriguez handle_channel_custom(wiphy, band, i, regd); 16231fa25e41SLuis R. Rodriguez } 16241fa25e41SLuis R. Rodriguez 16251fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 16261fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 16271fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 16281fa25e41SLuis R. Rodriguez { 16291fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1630bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1631ac46d48eSLuis R. Rodriguez 1632abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 16331fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1634bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1635bbcf3f02SLuis R. Rodriguez continue; 16361fa25e41SLuis R. Rodriguez handle_band_custom(wiphy, band, regd); 1637bbcf3f02SLuis R. Rodriguez bands_set++; 16381fa25e41SLuis R. Rodriguez } 1639abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1640bbcf3f02SLuis R. Rodriguez 1641bbcf3f02SLuis R. Rodriguez /* 1642bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 1643bbcf3f02SLuis R. Rodriguez * on your device's supportd bands. 1644bbcf3f02SLuis R. Rodriguez */ 1645bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 16461fa25e41SLuis R. Rodriguez } 16471fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 16481fa25e41SLuis R. Rodriguez 1649fb1fc7adSLuis R. Rodriguez /* 1650fb1fc7adSLuis R. Rodriguez * Return value which can be used by ignore_request() to indicate 1651fb1fc7adSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains 1652fb1fc7adSLuis R. Rodriguez */ 16539c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 16549c96477dSLuis R. Rodriguez 165584fa4f43SJohannes Berg /* This has the logic which determines when a new request 165684fa4f43SJohannes Berg * should be ignored. */ 16572f92cd2eSLuis R. Rodriguez static int ignore_request(struct wiphy *wiphy, 16582f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 165984fa4f43SJohannes Berg { 1660806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1661761cf7ecSLuis R. Rodriguez 1662761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1663761cf7ecSLuis R. Rodriguez 166484fa4f43SJohannes Berg /* All initial requests are respected */ 166584fa4f43SJohannes Berg if (!last_request) 166684fa4f43SJohannes Berg return 0; 166784fa4f43SJohannes Berg 16682f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 16697db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 167009d989d1SLuis R. Rodriguez return 0; 16717db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1672806a9e39SLuis R. Rodriguez 1673806a9e39SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1674806a9e39SLuis R. Rodriguez 16752f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 167684fa4f43SJohannes Berg return -EINVAL; 16777db90f4aSLuis R. Rodriguez if (last_request->initiator == 16787db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1679806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 168084fa4f43SJohannes Berg /* 168184fa4f43SJohannes Berg * Two cards with two APs claiming different 16821fe90b03SThadeu Lima de Souza Cascardo * Country IE alpha2s. We could 168384fa4f43SJohannes Berg * intersect them, but that seems unlikely 168484fa4f43SJohannes Berg * to be correct. Reject second one for now. 168584fa4f43SJohannes Berg */ 16862f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 168784fa4f43SJohannes Berg return -EOPNOTSUPP; 168884fa4f43SJohannes Berg return -EALREADY; 168984fa4f43SJohannes Berg } 1690fb1fc7adSLuis R. Rodriguez /* 1691fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1692fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1693fb1fc7adSLuis R. Rodriguez */ 16942f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 169584fa4f43SJohannes Berg return 0; 169684fa4f43SJohannes Berg return -EALREADY; 169784fa4f43SJohannes Berg } 16983f2355cbSLuis R. Rodriguez return REG_INTERSECT; 16997db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 17007db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { 17012f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 1702e74b1e7fSLuis R. Rodriguez return 0; 1703e74b1e7fSLuis R. Rodriguez return -EALREADY; 1704e74b1e7fSLuis R. Rodriguez } 1705fff32c04SLuis R. Rodriguez 1706fff32c04SLuis R. Rodriguez /* 1707fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1708fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1709fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1710fff32c04SLuis R. Rodriguez */ 17117db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 17122f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1713fff32c04SLuis R. Rodriguez return -EALREADY; 1714fff32c04SLuis R. Rodriguez 17153e0c3ff3SLuis R. Rodriguez return REG_INTERSECT; 17167db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 17177db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 17189c96477dSLuis R. Rodriguez return REG_INTERSECT; 1719fb1fc7adSLuis R. Rodriguez /* 1720fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1721fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1722fb1fc7adSLuis R. Rodriguez */ 17237db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && 17243f2355cbSLuis R. Rodriguez last_request->intersect) 17253f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 1726fb1fc7adSLuis R. Rodriguez /* 1727fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1728fb1fc7adSLuis R. Rodriguez * requests have been processed 1729fb1fc7adSLuis R. Rodriguez */ 17307db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || 17317db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || 17327db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 173369b1572bSLuis R. Rodriguez if (regdom_changes(last_request->alpha2)) 17345eebade6SLuis R. Rodriguez return -EAGAIN; 17355eebade6SLuis R. Rodriguez } 17365eebade6SLuis R. Rodriguez 1737baeb66feSJohn W. Linville if (!regdom_changes(pending_request->alpha2)) 1738e74b1e7fSLuis R. Rodriguez return -EALREADY; 1739e74b1e7fSLuis R. Rodriguez 174084fa4f43SJohannes Berg return 0; 174184fa4f43SJohannes Berg } 174284fa4f43SJohannes Berg 174384fa4f43SJohannes Berg return -EINVAL; 174484fa4f43SJohannes Berg } 174584fa4f43SJohannes Berg 1746d1c96a9aSLuis R. Rodriguez /** 1747d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1748d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1749d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 175028da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1751d1c96a9aSLuis R. Rodriguez * 1752d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 175328da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1754d1c96a9aSLuis R. Rodriguez * 1755d1c96a9aSLuis R. Rodriguez * Returns zero if all went fine, %-EALREADY if a regulatory domain had 1756d1c96a9aSLuis R. Rodriguez * already been set or other standard error codes. 1757d1c96a9aSLuis R. Rodriguez * 1758abc7381bSLuis R. Rodriguez * Caller must hold &cfg80211_mutex and ®_mutex 1759d1c96a9aSLuis R. Rodriguez */ 176028da32d7SLuis R. Rodriguez static int __regulatory_hint(struct wiphy *wiphy, 176128da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1762b2e1b302SLuis R. Rodriguez { 17639c96477dSLuis R. Rodriguez bool intersect = false; 1764b2e1b302SLuis R. Rodriguez int r = 0; 1765b2e1b302SLuis R. Rodriguez 1766761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1767761cf7ecSLuis R. Rodriguez 17682f92cd2eSLuis R. Rodriguez r = ignore_request(wiphy, pending_request); 17699c96477dSLuis R. Rodriguez 17703e0c3ff3SLuis R. Rodriguez if (r == REG_INTERSECT) { 17717db90f4aSLuis R. Rodriguez if (pending_request->initiator == 17727db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 17733e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1774d951c1ddSLuis R. Rodriguez if (r) { 1775d951c1ddSLuis R. Rodriguez kfree(pending_request); 1776b2e1b302SLuis R. Rodriguez return r; 17773e0c3ff3SLuis R. Rodriguez } 1778d951c1ddSLuis R. Rodriguez } 17793e0c3ff3SLuis R. Rodriguez intersect = true; 17803e0c3ff3SLuis R. Rodriguez } else if (r) { 1781fb1fc7adSLuis R. Rodriguez /* 1782fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 17833e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1784fb1fc7adSLuis R. Rodriguez * wiphy 1785fb1fc7adSLuis R. Rodriguez */ 178628da32d7SLuis R. Rodriguez if (r == -EALREADY && 17877db90f4aSLuis R. Rodriguez pending_request->initiator == 17887db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 17893e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1790d951c1ddSLuis R. Rodriguez if (r) { 1791d951c1ddSLuis R. Rodriguez kfree(pending_request); 17923e0c3ff3SLuis R. Rodriguez return r; 1793d951c1ddSLuis R. Rodriguez } 17943e0c3ff3SLuis R. Rodriguez r = -EALREADY; 17953e0c3ff3SLuis R. Rodriguez goto new_request; 17963e0c3ff3SLuis R. Rodriguez } 1797d951c1ddSLuis R. Rodriguez kfree(pending_request); 17983e0c3ff3SLuis R. Rodriguez return r; 17993e0c3ff3SLuis R. Rodriguez } 1800b2e1b302SLuis R. Rodriguez 18013e0c3ff3SLuis R. Rodriguez new_request: 1802f6037d09SJohannes Berg kfree(last_request); 1803d951c1ddSLuis R. Rodriguez 1804d951c1ddSLuis R. Rodriguez last_request = pending_request; 1805d951c1ddSLuis R. Rodriguez last_request->intersect = intersect; 1806d951c1ddSLuis R. Rodriguez 1807d951c1ddSLuis R. Rodriguez pending_request = NULL; 18083e0c3ff3SLuis R. Rodriguez 180909d989d1SLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 181009d989d1SLuis R. Rodriguez user_alpha2[0] = last_request->alpha2[0]; 181109d989d1SLuis R. Rodriguez user_alpha2[1] = last_request->alpha2[1]; 181209d989d1SLuis R. Rodriguez } 181309d989d1SLuis R. Rodriguez 18143e0c3ff3SLuis R. Rodriguez /* When r == REG_INTERSECT we do need to call CRDA */ 181573d54c9eSLuis R. Rodriguez if (r < 0) { 181673d54c9eSLuis R. Rodriguez /* 181773d54c9eSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 181873d54c9eSLuis R. Rodriguez * have applied the requested regulatory domain before we just 181973d54c9eSLuis R. Rodriguez * inform userspace we have processed the request 182073d54c9eSLuis R. Rodriguez */ 182173d54c9eSLuis R. Rodriguez if (r == -EALREADY) 182273d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 18233e0c3ff3SLuis R. Rodriguez return r; 182473d54c9eSLuis R. Rodriguez } 18253e0c3ff3SLuis R. Rodriguez 1826d951c1ddSLuis R. Rodriguez return call_crda(last_request->alpha2); 1827b2e1b302SLuis R. Rodriguez } 1828b2e1b302SLuis R. Rodriguez 182930a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 1830d951c1ddSLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 1831fe33eb39SLuis R. Rodriguez { 1832fe33eb39SLuis R. Rodriguez int r = 0; 1833fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1834fe33eb39SLuis R. Rodriguez 1835fe33eb39SLuis R. Rodriguez BUG_ON(!reg_request->alpha2); 1836fe33eb39SLuis R. Rodriguez 1837fe33eb39SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1838abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 1839fe33eb39SLuis R. Rodriguez 1840fe33eb39SLuis R. Rodriguez if (wiphy_idx_valid(reg_request->wiphy_idx)) 1841fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1842fe33eb39SLuis R. Rodriguez 18437db90f4aSLuis R. Rodriguez if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1844fe33eb39SLuis R. Rodriguez !wiphy) { 1845d951c1ddSLuis R. Rodriguez kfree(reg_request); 1846fe33eb39SLuis R. Rodriguez goto out; 1847fe33eb39SLuis R. Rodriguez } 1848fe33eb39SLuis R. Rodriguez 184928da32d7SLuis R. Rodriguez r = __regulatory_hint(wiphy, reg_request); 1850fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 18515be83de5SJohannes Berg if (r == -EALREADY && wiphy && 18525be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) 1853fe33eb39SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 1854fe33eb39SLuis R. Rodriguez out: 1855abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1856fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1857fe33eb39SLuis R. Rodriguez } 1858fe33eb39SLuis R. Rodriguez 18597db90f4aSLuis R. Rodriguez /* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */ 1860fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1861fe33eb39SLuis R. Rodriguez { 1862fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request; 1863fe33eb39SLuis R. Rodriguez 1864fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1865fe33eb39SLuis R. Rodriguez while (!list_empty(®_requests_list)) { 1866fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1867fe33eb39SLuis R. Rodriguez struct regulatory_request, 1868fe33eb39SLuis R. Rodriguez list); 1869fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1870fe33eb39SLuis R. Rodriguez 1871d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1872d951c1ddSLuis R. Rodriguez reg_process_hint(reg_request); 1873fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1874fe33eb39SLuis R. Rodriguez } 1875fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1876fe33eb39SLuis R. Rodriguez } 1877fe33eb39SLuis R. Rodriguez 1878e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1879e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1880e38f8a7aSLuis R. Rodriguez { 188179c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1882e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1883e38f8a7aSLuis R. Rodriguez 1884abc7381bSLuis R. Rodriguez /* 1885abc7381bSLuis R. Rodriguez * No need to hold the reg_mutex here as we just touch wiphys 1886abc7381bSLuis R. Rodriguez * and do not read or access regulatory variables. 1887abc7381bSLuis R. Rodriguez */ 1888e38f8a7aSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1889e38f8a7aSLuis R. Rodriguez 1890e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1891e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1892e38f8a7aSLuis R. Rodriguez 1893e38f8a7aSLuis R. Rodriguez if (list_empty(®_pending_beacons)) { 1894e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1895e38f8a7aSLuis R. Rodriguez goto out; 1896e38f8a7aSLuis R. Rodriguez } 1897e38f8a7aSLuis R. Rodriguez 1898e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1899e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1900e38f8a7aSLuis R. Rodriguez 1901e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1902e38f8a7aSLuis R. Rodriguez 1903e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 190479c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 190579c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 1906e38f8a7aSLuis R. Rodriguez 1907e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1908e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1909e38f8a7aSLuis R. Rodriguez } 1910e38f8a7aSLuis R. Rodriguez 1911e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1912e38f8a7aSLuis R. Rodriguez out: 1913e38f8a7aSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1914e38f8a7aSLuis R. Rodriguez } 1915e38f8a7aSLuis R. Rodriguez 1916fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1917fe33eb39SLuis R. Rodriguez { 1918fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1919e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 1920fe33eb39SLuis R. Rodriguez } 1921fe33eb39SLuis R. Rodriguez 1922fe33eb39SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 1923fe33eb39SLuis R. Rodriguez 1924fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1925fe33eb39SLuis R. Rodriguez { 1926fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1927fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1928fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1929fe33eb39SLuis R. Rodriguez 1930fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1931fe33eb39SLuis R. Rodriguez } 1932fe33eb39SLuis R. Rodriguez 193309d989d1SLuis R. Rodriguez /* 193409d989d1SLuis R. Rodriguez * Core regulatory hint -- happens during cfg80211_init() 193509d989d1SLuis R. Rodriguez * and when we restore regulatory settings. 193609d989d1SLuis R. Rodriguez */ 1937ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1938ba25c141SLuis R. Rodriguez { 1939ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1940ba25c141SLuis R. Rodriguez 194109d989d1SLuis R. Rodriguez kfree(last_request); 194209d989d1SLuis R. Rodriguez last_request = NULL; 1943ba25c141SLuis R. Rodriguez 1944ba25c141SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1945ba25c141SLuis R. Rodriguez GFP_KERNEL); 1946ba25c141SLuis R. Rodriguez if (!request) 1947ba25c141SLuis R. Rodriguez return -ENOMEM; 1948ba25c141SLuis R. Rodriguez 1949ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1950ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 19517db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 1952ba25c141SLuis R. Rodriguez 19535078b2e3SLuis R. Rodriguez /* 19545078b2e3SLuis R. Rodriguez * This ensures last_request is populated once modules 19555078b2e3SLuis R. Rodriguez * come swinging in and calling regulatory hints and 19565078b2e3SLuis R. Rodriguez * wiphy_apply_custom_regulatory(). 19575078b2e3SLuis R. Rodriguez */ 1958a2bff269SLuis R. Rodriguez reg_process_hint(request); 19595078b2e3SLuis R. Rodriguez 1960fe33eb39SLuis R. Rodriguez return 0; 1961ba25c141SLuis R. Rodriguez } 1962ba25c141SLuis R. Rodriguez 1963fe33eb39SLuis R. Rodriguez /* User hints */ 1964fe33eb39SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2) 1965b2e1b302SLuis R. Rodriguez { 1966fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1967fe33eb39SLuis R. Rodriguez 1968be3d4810SJohannes Berg BUG_ON(!alpha2); 1969b2e1b302SLuis R. Rodriguez 1970fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1971fe33eb39SLuis R. Rodriguez if (!request) 1972fe33eb39SLuis R. Rodriguez return -ENOMEM; 1973fe33eb39SLuis R. Rodriguez 1974fe33eb39SLuis R. Rodriguez request->wiphy_idx = WIPHY_IDX_STALE; 1975fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1976fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1977e12822e1SLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER; 1978fe33eb39SLuis R. Rodriguez 1979fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1980fe33eb39SLuis R. Rodriguez 1981fe33eb39SLuis R. Rodriguez return 0; 1982fe33eb39SLuis R. Rodriguez } 1983fe33eb39SLuis R. Rodriguez 1984fe33eb39SLuis R. Rodriguez /* Driver hints */ 1985fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1986fe33eb39SLuis R. Rodriguez { 1987fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1988fe33eb39SLuis R. Rodriguez 1989fe33eb39SLuis R. Rodriguez BUG_ON(!alpha2); 1990fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy); 1991fe33eb39SLuis R. Rodriguez 1992fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1993fe33eb39SLuis R. Rodriguez if (!request) 1994fe33eb39SLuis R. Rodriguez return -ENOMEM; 1995fe33eb39SLuis R. Rodriguez 1996fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1997fe33eb39SLuis R. Rodriguez 1998fe33eb39SLuis R. Rodriguez /* Must have registered wiphy first */ 1999fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); 2000fe33eb39SLuis R. Rodriguez 2001fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 2002fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 20037db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 2004fe33eb39SLuis R. Rodriguez 2005fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2006fe33eb39SLuis R. Rodriguez 2007fe33eb39SLuis R. Rodriguez return 0; 2008b2e1b302SLuis R. Rodriguez } 2009b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 2010b2e1b302SLuis R. Rodriguez 2011abc7381bSLuis R. Rodriguez /* Caller must hold reg_mutex */ 20123f2355cbSLuis R. Rodriguez static bool reg_same_country_ie_hint(struct wiphy *wiphy, 20133f2355cbSLuis R. Rodriguez u32 country_ie_checksum) 20143f2355cbSLuis R. Rodriguez { 2015806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 2016806a9e39SLuis R. Rodriguez 2017abc7381bSLuis R. Rodriguez assert_reg_lock(); 2018761cf7ecSLuis R. Rodriguez 2019cc0b6fe8SLuis R. Rodriguez if (unlikely(last_request->initiator != 2020cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE)) 2021cc0b6fe8SLuis R. Rodriguez return false; 2022cc0b6fe8SLuis R. Rodriguez 2023806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2024806a9e39SLuis R. Rodriguez 2025806a9e39SLuis R. Rodriguez if (!request_wiphy) 20263f2355cbSLuis R. Rodriguez return false; 2027806a9e39SLuis R. Rodriguez 2028806a9e39SLuis R. Rodriguez if (likely(request_wiphy != wiphy)) 20293f2355cbSLuis R. Rodriguez return !country_ie_integrity_changes(country_ie_checksum); 2030fb1fc7adSLuis R. Rodriguez /* 2031fb1fc7adSLuis R. Rodriguez * We should not have let these through at this point, they 20323f2355cbSLuis R. Rodriguez * should have been picked up earlier by the first alpha2 check 2033fb1fc7adSLuis R. Rodriguez * on the device 2034fb1fc7adSLuis R. Rodriguez */ 20353f2355cbSLuis R. Rodriguez if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) 20363f2355cbSLuis R. Rodriguez return true; 20373f2355cbSLuis R. Rodriguez return false; 20383f2355cbSLuis R. Rodriguez } 20393f2355cbSLuis R. Rodriguez 20404b44c8bcSLuis R. Rodriguez /* 20414b44c8bcSLuis R. Rodriguez * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and 20424b44c8bcSLuis R. Rodriguez * therefore cannot iterate over the rdev list here. 20434b44c8bcSLuis R. Rodriguez */ 20443f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 204584920e3eSLuis R. Rodriguez enum ieee80211_band band, 20463f2355cbSLuis R. Rodriguez u8 *country_ie, 20473f2355cbSLuis R. Rodriguez u8 country_ie_len) 20483f2355cbSLuis R. Rodriguez { 20493f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 20503f2355cbSLuis R. Rodriguez char alpha2[2]; 20513f2355cbSLuis R. Rodriguez u32 checksum = 0; 20523f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 2053fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 20543f2355cbSLuis R. Rodriguez 2055abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 20563f2355cbSLuis R. Rodriguez 20579828b017SLuis R. Rodriguez if (unlikely(!last_request)) 20589828b017SLuis R. Rodriguez goto out; 2059d335fe63SLuis R. Rodriguez 20603f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 20613f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 20623f2355cbSLuis R. Rodriguez goto out; 20633f2355cbSLuis R. Rodriguez 20643f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 20653f2355cbSLuis R. Rodriguez goto out; 20663f2355cbSLuis R. Rodriguez 2067fb1fc7adSLuis R. Rodriguez /* 2068fb1fc7adSLuis R. Rodriguez * Pending country IE processing, this can happen after we 20693f2355cbSLuis R. Rodriguez * call CRDA and wait for a response if a beacon was received before 2070fb1fc7adSLuis R. Rodriguez * we were able to process the last regulatory_hint_11d() call 2071fb1fc7adSLuis R. Rodriguez */ 20723f2355cbSLuis R. Rodriguez if (country_ie_regdomain) 20733f2355cbSLuis R. Rodriguez goto out; 20743f2355cbSLuis R. Rodriguez 20753f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 20763f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 20773f2355cbSLuis R. Rodriguez 20783f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 20793f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 20803f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 20813f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 20823f2355cbSLuis R. Rodriguez 2083fb1fc7adSLuis R. Rodriguez /* 20848b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 20854b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 20864b44c8bcSLuis R. Rodriguez * cfg80211_mutex. 2087fb1fc7adSLuis R. Rodriguez */ 2088cc0b6fe8SLuis R. Rodriguez if (likely(last_request->initiator == 2089cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE && 20904b44c8bcSLuis R. Rodriguez wiphy_idx_valid(last_request->wiphy_idx))) 20913f2355cbSLuis R. Rodriguez goto out; 20923f2355cbSLuis R. Rodriguez 209384920e3eSLuis R. Rodriguez rd = country_ie_2_rd(band, country_ie, country_ie_len, &checksum); 2094b74d12e1SLuis R. Rodriguez if (!rd) { 2095b74d12e1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Ignoring bogus country IE\n"); 20963f2355cbSLuis R. Rodriguez goto out; 2097b74d12e1SLuis R. Rodriguez } 20983f2355cbSLuis R. Rodriguez 2099915278e0SLuis R. Rodriguez /* 2100915278e0SLuis R. Rodriguez * This will not happen right now but we leave it here for the 21013f2355cbSLuis R. Rodriguez * the future when we want to add suspend/resume support and having 21023f2355cbSLuis R. Rodriguez * the user move to another country after doing so, or having the user 2103915278e0SLuis R. Rodriguez * move to another AP. Right now we just trust the first AP. 2104915278e0SLuis R. Rodriguez * 2105915278e0SLuis R. Rodriguez * If we hit this before we add this support we want to be informed of 2106915278e0SLuis R. Rodriguez * it as it would indicate a mistake in the current design 2107915278e0SLuis R. Rodriguez */ 2108915278e0SLuis R. Rodriguez if (WARN_ON(reg_same_country_ie_hint(wiphy, checksum))) 21090441d6ffSLuis R. Rodriguez goto free_rd_out; 21103f2355cbSLuis R. Rodriguez 2111fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2112fe33eb39SLuis R. Rodriguez if (!request) 2113fe33eb39SLuis R. Rodriguez goto free_rd_out; 2114fe33eb39SLuis R. Rodriguez 2115fb1fc7adSLuis R. Rodriguez /* 2116fb1fc7adSLuis R. Rodriguez * We keep this around for when CRDA comes back with a response so 2117fb1fc7adSLuis R. Rodriguez * we can intersect with that 2118fb1fc7adSLuis R. Rodriguez */ 21193f2355cbSLuis R. Rodriguez country_ie_regdomain = rd; 21203f2355cbSLuis R. Rodriguez 2121fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 2122fe33eb39SLuis R. Rodriguez request->alpha2[0] = rd->alpha2[0]; 2123fe33eb39SLuis R. Rodriguez request->alpha2[1] = rd->alpha2[1]; 21247db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 2125fe33eb39SLuis R. Rodriguez request->country_ie_checksum = checksum; 2126fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 21273f2355cbSLuis R. Rodriguez 2128abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2129fe33eb39SLuis R. Rodriguez 2130fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2131fe33eb39SLuis R. Rodriguez 2132fe33eb39SLuis R. Rodriguez return; 21330441d6ffSLuis R. Rodriguez 21340441d6ffSLuis R. Rodriguez free_rd_out: 21350441d6ffSLuis R. Rodriguez kfree(rd); 21363f2355cbSLuis R. Rodriguez out: 2137abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 21383f2355cbSLuis R. Rodriguez } 2139b2e1b302SLuis R. Rodriguez 214009d989d1SLuis R. Rodriguez static void restore_alpha2(char *alpha2, bool reset_user) 214109d989d1SLuis R. Rodriguez { 214209d989d1SLuis R. Rodriguez /* indicates there is no alpha2 to consider for restoration */ 214309d989d1SLuis R. Rodriguez alpha2[0] = '9'; 214409d989d1SLuis R. Rodriguez alpha2[1] = '7'; 214509d989d1SLuis R. Rodriguez 214609d989d1SLuis R. Rodriguez /* The user setting has precedence over the module parameter */ 214709d989d1SLuis R. Rodriguez if (is_user_regdom_saved()) { 214809d989d1SLuis R. Rodriguez /* Unless we're asked to ignore it and reset it */ 214909d989d1SLuis R. Rodriguez if (reset_user) { 215009d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Restoring regulatory settings " 215109d989d1SLuis R. Rodriguez "including user preference\n"); 215209d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 215309d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 215409d989d1SLuis R. Rodriguez 215509d989d1SLuis R. Rodriguez /* 215609d989d1SLuis R. Rodriguez * If we're ignoring user settings, we still need to 215709d989d1SLuis R. Rodriguez * check the module parameter to ensure we put things 215809d989d1SLuis R. Rodriguez * back as they were for a full restore. 215909d989d1SLuis R. Rodriguez */ 216009d989d1SLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) { 216109d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Keeping preference on " 216209d989d1SLuis R. Rodriguez "module parameter ieee80211_regdom: %c%c\n", 216309d989d1SLuis R. Rodriguez ieee80211_regdom[0], 216409d989d1SLuis R. Rodriguez ieee80211_regdom[1]); 216509d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 216609d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 216709d989d1SLuis R. Rodriguez } 216809d989d1SLuis R. Rodriguez } else { 216909d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Restoring regulatory settings " 217009d989d1SLuis R. Rodriguez "while preserving user preference for: %c%c\n", 217109d989d1SLuis R. Rodriguez user_alpha2[0], 217209d989d1SLuis R. Rodriguez user_alpha2[1]); 217309d989d1SLuis R. Rodriguez alpha2[0] = user_alpha2[0]; 217409d989d1SLuis R. Rodriguez alpha2[1] = user_alpha2[1]; 217509d989d1SLuis R. Rodriguez } 217609d989d1SLuis R. Rodriguez } else if (!is_world_regdom(ieee80211_regdom)) { 217709d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Keeping preference on " 217809d989d1SLuis R. Rodriguez "module parameter ieee80211_regdom: %c%c\n", 217909d989d1SLuis R. Rodriguez ieee80211_regdom[0], 218009d989d1SLuis R. Rodriguez ieee80211_regdom[1]); 218109d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 218209d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 218309d989d1SLuis R. Rodriguez } else 218409d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Restoring regulatory settings\n"); 218509d989d1SLuis R. Rodriguez } 218609d989d1SLuis R. Rodriguez 218709d989d1SLuis R. Rodriguez /* 218809d989d1SLuis R. Rodriguez * Restoring regulatory settings involves ingoring any 218909d989d1SLuis R. Rodriguez * possibly stale country IE information and user regulatory 219009d989d1SLuis R. Rodriguez * settings if so desired, this includes any beacon hints 219109d989d1SLuis R. Rodriguez * learned as we could have traveled outside to another country 219209d989d1SLuis R. Rodriguez * after disconnection. To restore regulatory settings we do 219309d989d1SLuis R. Rodriguez * exactly what we did at bootup: 219409d989d1SLuis R. Rodriguez * 219509d989d1SLuis R. Rodriguez * - send a core regulatory hint 219609d989d1SLuis R. Rodriguez * - send a user regulatory hint if applicable 219709d989d1SLuis R. Rodriguez * 219809d989d1SLuis R. Rodriguez * Device drivers that send a regulatory hint for a specific country 219909d989d1SLuis R. Rodriguez * keep their own regulatory domain on wiphy->regd so that does does 220009d989d1SLuis R. Rodriguez * not need to be remembered. 220109d989d1SLuis R. Rodriguez */ 220209d989d1SLuis R. Rodriguez static void restore_regulatory_settings(bool reset_user) 220309d989d1SLuis R. Rodriguez { 220409d989d1SLuis R. Rodriguez char alpha2[2]; 220509d989d1SLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 220609d989d1SLuis R. Rodriguez 220709d989d1SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 220809d989d1SLuis R. Rodriguez mutex_lock(®_mutex); 220909d989d1SLuis R. Rodriguez 221009d989d1SLuis R. Rodriguez reset_regdomains(); 221109d989d1SLuis R. Rodriguez restore_alpha2(alpha2, reset_user); 221209d989d1SLuis R. Rodriguez 221309d989d1SLuis R. Rodriguez /* Clear beacon hints */ 221409d989d1SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 221509d989d1SLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 221609d989d1SLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 221709d989d1SLuis R. Rodriguez ®_pending_beacons, list) { 221809d989d1SLuis R. Rodriguez list_del(®_beacon->list); 221909d989d1SLuis R. Rodriguez kfree(reg_beacon); 222009d989d1SLuis R. Rodriguez } 222109d989d1SLuis R. Rodriguez } 222209d989d1SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 222309d989d1SLuis R. Rodriguez 222409d989d1SLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 222509d989d1SLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 222609d989d1SLuis R. Rodriguez ®_beacon_list, list) { 222709d989d1SLuis R. Rodriguez list_del(®_beacon->list); 222809d989d1SLuis R. Rodriguez kfree(reg_beacon); 222909d989d1SLuis R. Rodriguez } 223009d989d1SLuis R. Rodriguez } 223109d989d1SLuis R. Rodriguez 223209d989d1SLuis R. Rodriguez /* First restore to the basic regulatory settings */ 223309d989d1SLuis R. Rodriguez cfg80211_regdomain = cfg80211_world_regdom; 223409d989d1SLuis R. Rodriguez 223509d989d1SLuis R. Rodriguez mutex_unlock(®_mutex); 223609d989d1SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 223709d989d1SLuis R. Rodriguez 223809d989d1SLuis R. Rodriguez regulatory_hint_core(cfg80211_regdomain->alpha2); 223909d989d1SLuis R. Rodriguez 224009d989d1SLuis R. Rodriguez /* 224109d989d1SLuis R. Rodriguez * This restores the ieee80211_regdom module parameter 224209d989d1SLuis R. Rodriguez * preference or the last user requested regulatory 224309d989d1SLuis R. Rodriguez * settings, user regulatory settings takes precedence. 224409d989d1SLuis R. Rodriguez */ 224509d989d1SLuis R. Rodriguez if (is_an_alpha2(alpha2)) 224609d989d1SLuis R. Rodriguez regulatory_hint_user(user_alpha2); 224709d989d1SLuis R. Rodriguez } 224809d989d1SLuis R. Rodriguez 224909d989d1SLuis R. Rodriguez 225009d989d1SLuis R. Rodriguez void regulatory_hint_disconnect(void) 225109d989d1SLuis R. Rodriguez { 225209d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: All devices are disconnected, going to " 225309d989d1SLuis R. Rodriguez "restore regulatory settings\n"); 225409d989d1SLuis R. Rodriguez restore_regulatory_settings(false); 225509d989d1SLuis R. Rodriguez } 225609d989d1SLuis R. Rodriguez 2257e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 2258e38f8a7aSLuis R. Rodriguez { 2259e38f8a7aSLuis R. Rodriguez if (freq == ieee80211_channel_to_frequency(12) || 2260e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(13) || 2261e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(14)) 2262e38f8a7aSLuis R. Rodriguez return true; 2263e38f8a7aSLuis R. Rodriguez return false; 2264e38f8a7aSLuis R. Rodriguez } 2265e38f8a7aSLuis R. Rodriguez 2266e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 2267e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 2268e38f8a7aSLuis R. Rodriguez gfp_t gfp) 2269e38f8a7aSLuis R. Rodriguez { 2270e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 2271e38f8a7aSLuis R. Rodriguez 2272e38f8a7aSLuis R. Rodriguez if (likely((beacon_chan->beacon_found || 2273e38f8a7aSLuis R. Rodriguez (beacon_chan->flags & IEEE80211_CHAN_RADAR) || 2274e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 2275e38f8a7aSLuis R. Rodriguez !freq_is_chan_12_13_14(beacon_chan->center_freq))))) 2276e38f8a7aSLuis R. Rodriguez return 0; 2277e38f8a7aSLuis R. Rodriguez 2278e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 2279e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 2280e38f8a7aSLuis R. Rodriguez return -ENOMEM; 2281e38f8a7aSLuis R. Rodriguez 22824113f751SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Found new beacon on " 2283e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", 2284e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 2285e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 2286e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 22874113f751SLuis R. Rodriguez 2288e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 2289e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 2290e38f8a7aSLuis R. Rodriguez 2291e38f8a7aSLuis R. Rodriguez 2292e38f8a7aSLuis R. Rodriguez /* 2293e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 2294e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 2295e38f8a7aSLuis R. Rodriguez */ 2296e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2297e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 2298e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2299e38f8a7aSLuis R. Rodriguez 2300e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 2301e38f8a7aSLuis R. Rodriguez 2302e38f8a7aSLuis R. Rodriguez return 0; 2303e38f8a7aSLuis R. Rodriguez } 2304e38f8a7aSLuis R. Rodriguez 2305a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 2306b2e1b302SLuis R. Rodriguez { 2307b2e1b302SLuis R. Rodriguez unsigned int i; 2308a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 2309a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 2310a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 2311b2e1b302SLuis R. Rodriguez 2312269ac5fdSKalle Valo printk(KERN_INFO " (start_freq - end_freq @ bandwidth), " 2313b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 2314b2e1b302SLuis R. Rodriguez 2315b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 2316b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 2317b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 2318b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 2319b2e1b302SLuis R. Rodriguez 2320fb1fc7adSLuis R. Rodriguez /* 2321fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 2322fb1fc7adSLuis R. Rodriguez * in certain regions 2323fb1fc7adSLuis R. Rodriguez */ 2324b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 2325269ac5fdSKalle Valo printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " 2326b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 2327b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2328b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 2329b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 2330b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 2331b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 2332b2e1b302SLuis R. Rodriguez else 2333269ac5fdSKalle Valo printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " 2334b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 2335b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2336b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 2337b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 2338b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 2339b2e1b302SLuis R. Rodriguez } 2340b2e1b302SLuis R. Rodriguez } 2341b2e1b302SLuis R. Rodriguez 2342a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 2343b2e1b302SLuis R. Rodriguez { 2344b2e1b302SLuis R. Rodriguez 23453f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 23463f2355cbSLuis R. Rodriguez 23477db90f4aSLuis R. Rodriguez if (last_request->initiator == 23487db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 234979c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 235079c97e97SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx( 2351806a9e39SLuis R. Rodriguez last_request->wiphy_idx); 235279c97e97SJohannes Berg if (rdev) { 23533f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 23543f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 235579c97e97SJohannes Berg rdev->country_ie_alpha2[0], 235679c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 23573f2355cbSLuis R. Rodriguez } else 23583f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 23593f2355cbSLuis R. Rodriguez "domain intersected:\n"); 23603f2355cbSLuis R. Rodriguez } else 23613f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 2362039498c6SLuis R. Rodriguez "domain intersected:\n"); 23633f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 2364b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 2365b2e1b302SLuis R. Rodriguez "domain updated:\n"); 2366b2e1b302SLuis R. Rodriguez else { 2367b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 2368b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 2369b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 2370b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 2371b2e1b302SLuis R. Rodriguez else 2372b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 2373b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 2374b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 2375b2e1b302SLuis R. Rodriguez } 2376b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2377b2e1b302SLuis R. Rodriguez } 2378b2e1b302SLuis R. Rodriguez 23792df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 2380b2e1b302SLuis R. Rodriguez { 2381b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 2382b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 2383b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2384b2e1b302SLuis R. Rodriguez } 2385b2e1b302SLuis R. Rodriguez 23863f2355cbSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 23873f2355cbSLuis R. Rodriguez static void reg_country_ie_process_debug( 23883f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 23893f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 23903f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 23913f2355cbSLuis R. Rodriguez { 23923f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Received country IE:\n"); 23933f2355cbSLuis R. Rodriguez print_regdomain_info(country_ie_regdomain); 23943f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); 23953f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 23963f2355cbSLuis R. Rodriguez if (intersected_rd) { 23973f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: We intersect both of these " 23983f2355cbSLuis R. Rodriguez "and get:\n"); 2399667ecd01SLuis R. Rodriguez print_regdomain_info(intersected_rd); 24003f2355cbSLuis R. Rodriguez return; 24013f2355cbSLuis R. Rodriguez } 24023f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); 24033f2355cbSLuis R. Rodriguez } 24043f2355cbSLuis R. Rodriguez #else 24053f2355cbSLuis R. Rodriguez static inline void reg_country_ie_process_debug( 24063f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 24073f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 24083f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 24093f2355cbSLuis R. Rodriguez { 24103f2355cbSLuis R. Rodriguez } 24113f2355cbSLuis R. Rodriguez #endif 24123f2355cbSLuis R. Rodriguez 2413d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 2414a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 2415b2e1b302SLuis R. Rodriguez { 24169c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 241779c97e97SJohannes Berg struct cfg80211_registered_device *rdev = NULL; 2418806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 2419b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 2420b2e1b302SLuis R. Rodriguez 2421b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 2422f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 2423b2e1b302SLuis R. Rodriguez return -EINVAL; 2424b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 2425b2e1b302SLuis R. Rodriguez return 0; 2426b2e1b302SLuis R. Rodriguez } 2427b2e1b302SLuis R. Rodriguez 2428b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 2429b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 2430b2e1b302SLuis R. Rodriguez return -EINVAL; 2431b2e1b302SLuis R. Rodriguez 2432f6037d09SJohannes Berg if (!last_request) 2433b2e1b302SLuis R. Rodriguez return -EINVAL; 2434b2e1b302SLuis R. Rodriguez 2435fb1fc7adSLuis R. Rodriguez /* 2436fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 24373f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 2438fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 2439fb1fc7adSLuis R. Rodriguez */ 24407db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2441fb1fc7adSLuis R. Rodriguez /* 2442fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 2443fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 2444fb1fc7adSLuis R. Rodriguez */ 2445baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 2446b2e1b302SLuis R. Rodriguez return -EINVAL; 24473f2355cbSLuis R. Rodriguez } 24483f2355cbSLuis R. Rodriguez 2449fb1fc7adSLuis R. Rodriguez /* 2450fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 2451b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 2452b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 2453fb1fc7adSLuis R. Rodriguez * internal EEPROM data 2454fb1fc7adSLuis R. Rodriguez */ 2455b2e1b302SLuis R. Rodriguez 2456f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 2457b2e1b302SLuis R. Rodriguez return -EINVAL; 2458b2e1b302SLuis R. Rodriguez 2459b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2460b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 2461b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 2462b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 2463b2e1b302SLuis R. Rodriguez return -EINVAL; 2464b2e1b302SLuis R. Rodriguez } 2465b2e1b302SLuis R. Rodriguez 2466806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2467806a9e39SLuis R. Rodriguez 2468b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 24693e0c3ff3SLuis R. Rodriguez int r; 24703e0c3ff3SLuis R. Rodriguez 24717db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { 24723e0c3ff3SLuis R. Rodriguez reset_regdomains(); 24733e0c3ff3SLuis R. Rodriguez cfg80211_regdomain = rd; 24743e0c3ff3SLuis R. Rodriguez return 0; 24753e0c3ff3SLuis R. Rodriguez } 24763e0c3ff3SLuis R. Rodriguez 2477fb1fc7adSLuis R. Rodriguez /* 2478fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 2479fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 2480fb1fc7adSLuis R. Rodriguez */ 24813e0c3ff3SLuis R. Rodriguez 2482558f6d32SLuis R. Rodriguez /* 2483558f6d32SLuis R. Rodriguez * Userspace could have sent two replies with only 2484558f6d32SLuis R. Rodriguez * one kernel request. 2485558f6d32SLuis R. Rodriguez */ 2486558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 2487558f6d32SLuis R. Rodriguez return -EALREADY; 24883e0c3ff3SLuis R. Rodriguez 2489806a9e39SLuis R. Rodriguez r = reg_copy_regd(&request_wiphy->regd, rd); 24903e0c3ff3SLuis R. Rodriguez if (r) 24913e0c3ff3SLuis R. Rodriguez return r; 24923e0c3ff3SLuis R. Rodriguez 2493b8295acdSLuis R. Rodriguez reset_regdomains(); 2494b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 2495b8295acdSLuis R. Rodriguez return 0; 2496b8295acdSLuis R. Rodriguez } 2497b8295acdSLuis R. Rodriguez 2498b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 2499b8295acdSLuis R. Rodriguez 25007db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2501b8295acdSLuis R. Rodriguez 25029c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 25039c96477dSLuis R. Rodriguez if (!intersected_rd) 25049c96477dSLuis R. Rodriguez return -EINVAL; 2505b8295acdSLuis R. Rodriguez 2506fb1fc7adSLuis R. Rodriguez /* 2507fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 25083e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2509fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2510fb1fc7adSLuis R. Rodriguez */ 25117db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) 2512806a9e39SLuis R. Rodriguez request_wiphy->regd = rd; 25133e0c3ff3SLuis R. Rodriguez else 25149c96477dSLuis R. Rodriguez kfree(rd); 25153e0c3ff3SLuis R. Rodriguez 2516b8295acdSLuis R. Rodriguez rd = NULL; 2517b8295acdSLuis R. Rodriguez 2518b8295acdSLuis R. Rodriguez reset_regdomains(); 2519b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2520b8295acdSLuis R. Rodriguez 2521b8295acdSLuis R. Rodriguez return 0; 25229c96477dSLuis R. Rodriguez } 25239c96477dSLuis R. Rodriguez 25243f2355cbSLuis R. Rodriguez /* 25253f2355cbSLuis R. Rodriguez * Country IE requests are handled a bit differently, we intersect 25263f2355cbSLuis R. Rodriguez * the country IE rd with what CRDA believes that country should have 25273f2355cbSLuis R. Rodriguez */ 25283f2355cbSLuis R. Rodriguez 2529729e9c76SLuis R. Rodriguez /* 2530729e9c76SLuis R. Rodriguez * Userspace could have sent two replies with only 2531729e9c76SLuis R. Rodriguez * one kernel request. By the second reply we would have 2532729e9c76SLuis R. Rodriguez * already processed and consumed the country_ie_regdomain. 2533729e9c76SLuis R. Rodriguez */ 2534729e9c76SLuis R. Rodriguez if (!country_ie_regdomain) 2535729e9c76SLuis R. Rodriguez return -EALREADY; 253686f04680SLuis R. Rodriguez BUG_ON(rd == country_ie_regdomain); 25373f2355cbSLuis R. Rodriguez 2538fb1fc7adSLuis R. Rodriguez /* 2539fb1fc7adSLuis R. Rodriguez * Intersect what CRDA returned and our what we 2540fb1fc7adSLuis R. Rodriguez * had built from the Country IE received 2541fb1fc7adSLuis R. Rodriguez */ 25423f2355cbSLuis R. Rodriguez 25433f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, country_ie_regdomain); 25443f2355cbSLuis R. Rodriguez 254586f04680SLuis R. Rodriguez reg_country_ie_process_debug(rd, 254686f04680SLuis R. Rodriguez country_ie_regdomain, 25473f2355cbSLuis R. Rodriguez intersected_rd); 25483f2355cbSLuis R. Rodriguez 25493f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 25503f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 25513f2355cbSLuis R. Rodriguez 25523f2355cbSLuis R. Rodriguez if (!intersected_rd) 25533f2355cbSLuis R. Rodriguez return -EINVAL; 25543f2355cbSLuis R. Rodriguez 255579c97e97SJohannes Berg rdev = wiphy_to_dev(request_wiphy); 25563f2355cbSLuis R. Rodriguez 255779c97e97SJohannes Berg rdev->country_ie_alpha2[0] = rd->alpha2[0]; 255879c97e97SJohannes Berg rdev->country_ie_alpha2[1] = rd->alpha2[1]; 255979c97e97SJohannes Berg rdev->env = last_request->country_ie_env; 25603f2355cbSLuis R. Rodriguez 25613f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 25623f2355cbSLuis R. Rodriguez 25633f2355cbSLuis R. Rodriguez kfree(rd); 25643f2355cbSLuis R. Rodriguez rd = NULL; 25653f2355cbSLuis R. Rodriguez 2566b8295acdSLuis R. Rodriguez reset_regdomains(); 25673f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2568b2e1b302SLuis R. Rodriguez 2569b2e1b302SLuis R. Rodriguez return 0; 2570b2e1b302SLuis R. Rodriguez } 2571b2e1b302SLuis R. Rodriguez 2572b2e1b302SLuis R. Rodriguez 2573fb1fc7adSLuis R. Rodriguez /* 2574fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2575b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2576fb1fc7adSLuis R. Rodriguez * kmalloc'd the rd structure. Caller must hold cfg80211_mutex 2577fb1fc7adSLuis R. Rodriguez */ 2578a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2579b2e1b302SLuis R. Rodriguez { 2580b2e1b302SLuis R. Rodriguez int r; 2581b2e1b302SLuis R. Rodriguez 2582761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2583761cf7ecSLuis R. Rodriguez 2584abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2585abc7381bSLuis R. Rodriguez 2586b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 2587b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 2588d2372b31SJohannes Berg if (r) { 2589d2372b31SJohannes Berg kfree(rd); 2590abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2591b2e1b302SLuis R. Rodriguez return r; 2592d2372b31SJohannes Berg } 2593b2e1b302SLuis R. Rodriguez 2594b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 2595a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 2596b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 2597b2e1b302SLuis R. Rodriguez 2598b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2599f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 2600b2e1b302SLuis R. Rodriguez 2601a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 2602b2e1b302SLuis R. Rodriguez 260373d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 260473d54c9eSLuis R. Rodriguez 2605abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2606abc7381bSLuis R. Rodriguez 2607b2e1b302SLuis R. Rodriguez return r; 2608b2e1b302SLuis R. Rodriguez } 2609b2e1b302SLuis R. Rodriguez 2610a1794390SLuis R. Rodriguez /* Caller must hold cfg80211_mutex */ 26113f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 26123f2355cbSLuis R. Rodriguez { 26130ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 2614806a9e39SLuis R. Rodriguez 2615761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2616761cf7ecSLuis R. Rodriguez 2617abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2618abc7381bSLuis R. Rodriguez 26190ef9ccddSChris Wright kfree(wiphy->regd); 26200ef9ccddSChris Wright 26210ad8acafSLuis R. Rodriguez if (last_request) 2622806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2623806a9e39SLuis R. Rodriguez 26240ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 2625abc7381bSLuis R. Rodriguez goto out; 26260ef9ccddSChris Wright 2627806a9e39SLuis R. Rodriguez last_request->wiphy_idx = WIPHY_IDX_STALE; 26283f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 2629abc7381bSLuis R. Rodriguez out: 2630abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 26313f2355cbSLuis R. Rodriguez } 26323f2355cbSLuis R. Rodriguez 26332fcc9f73SUwe Kleine-König int __init regulatory_init(void) 2634b2e1b302SLuis R. Rodriguez { 2635bcf4f99bSLuis R. Rodriguez int err = 0; 2636734366deSJohannes Berg 2637b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 2638b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 2639b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 2640734366deSJohannes Berg 2641fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 2642e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2643fe33eb39SLuis R. Rodriguez 2644a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 2645734366deSJohannes Berg 264609d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 264709d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 264809d989d1SLuis R. Rodriguez 2649ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 2650ae9e4b0dSLuis R. Rodriguez err = regulatory_hint_core(cfg80211_regdomain->alpha2); 2651bcf4f99bSLuis R. Rodriguez if (err) { 2652bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2653bcf4f99bSLuis R. Rodriguez return err; 2654bcf4f99bSLuis R. Rodriguez /* 2655bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2656bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2657bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2658bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2659bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2660bcf4f99bSLuis R. Rodriguez */ 2661bcf4f99bSLuis R. Rodriguez printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " 2662bcf4f99bSLuis R. Rodriguez "to call CRDA during init"); 2663bcf4f99bSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 2664bcf4f99bSLuis R. Rodriguez /* We want to find out exactly why when debugging */ 2665bcf4f99bSLuis R. Rodriguez WARN_ON(err); 2666bcf4f99bSLuis R. Rodriguez #endif 2667bcf4f99bSLuis R. Rodriguez } 2668734366deSJohannes Berg 2669ae9e4b0dSLuis R. Rodriguez /* 2670ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 2671ae9e4b0dSLuis R. Rodriguez * as a user hint. 2672ae9e4b0dSLuis R. Rodriguez */ 2673ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 2674ae9e4b0dSLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom); 2675ae9e4b0dSLuis R. Rodriguez 2676b2e1b302SLuis R. Rodriguez return 0; 2677b2e1b302SLuis R. Rodriguez } 2678b2e1b302SLuis R. Rodriguez 26792fcc9f73SUwe Kleine-König void /* __init_or_exit */ regulatory_exit(void) 2680b2e1b302SLuis R. Rodriguez { 2681fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2682e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2683fe33eb39SLuis R. Rodriguez 2684fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2685fe33eb39SLuis R. Rodriguez 2686a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 2687abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2688734366deSJohannes Berg 2689b2e1b302SLuis R. Rodriguez reset_regdomains(); 2690734366deSJohannes Berg 26913f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 26923f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 26933f2355cbSLuis R. Rodriguez 2694f6037d09SJohannes Berg kfree(last_request); 2695f6037d09SJohannes Berg 2696b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2697734366deSJohannes Berg 2698e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2699e38f8a7aSLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 2700e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2701e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2702e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2703e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2704e38f8a7aSLuis R. Rodriguez } 2705e38f8a7aSLuis R. Rodriguez } 2706e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2707e38f8a7aSLuis R. Rodriguez 2708e38f8a7aSLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 2709e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2710e38f8a7aSLuis R. Rodriguez ®_beacon_list, list) { 2711e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2712e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2713e38f8a7aSLuis R. Rodriguez } 2714e38f8a7aSLuis R. Rodriguez } 2715e38f8a7aSLuis R. Rodriguez 2716fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2717fe33eb39SLuis R. Rodriguez if (!list_empty(®_requests_list)) { 2718fe33eb39SLuis R. Rodriguez list_for_each_entry_safe(reg_request, tmp, 2719fe33eb39SLuis R. Rodriguez ®_requests_list, list) { 2720fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2721fe33eb39SLuis R. Rodriguez kfree(reg_request); 2722fe33eb39SLuis R. Rodriguez } 2723fe33eb39SLuis R. Rodriguez } 2724fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2725fe33eb39SLuis R. Rodriguez 2726abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2727a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 27288318d78aSJohannes Berg } 2729