18318d78aSJohannes Berg /* 28318d78aSJohannes Berg * Copyright 2002-2005, Instant802 Networks, Inc. 38318d78aSJohannes Berg * Copyright 2005-2006, Devicescape Software, Inc. 48318d78aSJohannes Berg * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 5b2e1b302SLuis R. Rodriguez * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com> 68318d78aSJohannes Berg * 78318d78aSJohannes Berg * This program is free software; you can redistribute it and/or modify 88318d78aSJohannes Berg * it under the terms of the GNU General Public License version 2 as 98318d78aSJohannes Berg * published by the Free Software Foundation. 108318d78aSJohannes Berg */ 118318d78aSJohannes Berg 12b2e1b302SLuis R. Rodriguez /** 13b2e1b302SLuis R. Rodriguez * DOC: Wireless regulatory infrastructure 148318d78aSJohannes Berg * 158318d78aSJohannes Berg * The usual implementation is for a driver to read a device EEPROM to 168318d78aSJohannes Berg * determine which regulatory domain it should be operating under, then 178318d78aSJohannes Berg * looking up the allowable channels in a driver-local table and finally 188318d78aSJohannes Berg * registering those channels in the wiphy structure. 198318d78aSJohannes Berg * 20b2e1b302SLuis R. Rodriguez * Another set of compliance enforcement is for drivers to use their 21b2e1b302SLuis R. Rodriguez * own compliance limits which can be stored on the EEPROM. The host 22b2e1b302SLuis R. Rodriguez * driver or firmware may ensure these are used. 23b2e1b302SLuis R. Rodriguez * 24b2e1b302SLuis R. Rodriguez * In addition to all this we provide an extra layer of regulatory 25b2e1b302SLuis R. Rodriguez * conformance. For drivers which do not have any regulatory 26b2e1b302SLuis R. Rodriguez * information CRDA provides the complete regulatory solution. 27b2e1b302SLuis R. Rodriguez * For others it provides a community effort on further restrictions 28b2e1b302SLuis R. Rodriguez * to enhance compliance. 29b2e1b302SLuis R. Rodriguez * 30b2e1b302SLuis R. Rodriguez * Note: When number of rules --> infinity we will not be able to 31b2e1b302SLuis R. Rodriguez * index on alpha2 any more, instead we'll probably have to 32b2e1b302SLuis R. Rodriguez * rely on some SHA1 checksum of the regdomain for example. 33b2e1b302SLuis R. Rodriguez * 348318d78aSJohannes Berg */ 358318d78aSJohannes Berg #include <linux/kernel.h> 36b2e1b302SLuis R. Rodriguez #include <linux/list.h> 37b2e1b302SLuis R. Rodriguez #include <linux/random.h> 38b2e1b302SLuis R. Rodriguez #include <linux/nl80211.h> 39b2e1b302SLuis R. Rodriguez #include <linux/platform_device.h> 40b2e1b302SLuis R. Rodriguez #include <net/cfg80211.h> 418318d78aSJohannes Berg #include "core.h" 42b2e1b302SLuis R. Rodriguez #include "reg.h" 433b377ea9SJohn W. Linville #include "regdb.h" 4473d54c9eSLuis R. Rodriguez #include "nl80211.h" 458318d78aSJohannes Berg 464113f751SLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 478271195eSJohn W. Linville #define REG_DBG_PRINT(format, args...) \ 484113f751SLuis R. Rodriguez do { \ 498271195eSJohn W. Linville printk(KERN_DEBUG format , ## args); \ 504113f751SLuis R. Rodriguez } while (0) 514113f751SLuis R. Rodriguez #else 528271195eSJohn W. Linville #define REG_DBG_PRINT(args...) 534113f751SLuis R. Rodriguez #endif 544113f751SLuis R. Rodriguez 555166ccd2SLuis R. Rodriguez /* Receipt of information from last regulatory request */ 56f6037d09SJohannes Berg static struct regulatory_request *last_request; 57734366deSJohannes Berg 58b2e1b302SLuis R. Rodriguez /* To trigger userspace events */ 59b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 608318d78aSJohannes Berg 61fb1fc7adSLuis R. Rodriguez /* 62fb1fc7adSLuis R. Rodriguez * Central wireless core regulatory domains, we only need two, 63734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 64fb1fc7adSLuis R. Rodriguez * information to give us an alpha2 65fb1fc7adSLuis R. Rodriguez */ 66f130347cSLuis R. Rodriguez const struct ieee80211_regdomain *cfg80211_regdomain; 67734366deSJohannes Berg 68fb1fc7adSLuis R. Rodriguez /* 69fb1fc7adSLuis R. Rodriguez * We use this as a place for the rd structure built from the 703f2355cbSLuis R. Rodriguez * last parsed country IE to rest until CRDA gets back to us with 71fb1fc7adSLuis R. Rodriguez * what it thinks should apply for the same country 72fb1fc7adSLuis R. Rodriguez */ 733f2355cbSLuis R. Rodriguez static const struct ieee80211_regdomain *country_ie_regdomain; 743f2355cbSLuis R. Rodriguez 75abc7381bSLuis R. Rodriguez /* 76abc7381bSLuis R. Rodriguez * Protects static reg.c components: 77abc7381bSLuis R. Rodriguez * - cfg80211_world_regdom 78abc7381bSLuis R. Rodriguez * - cfg80211_regdom 79abc7381bSLuis R. Rodriguez * - country_ie_regdomain 80abc7381bSLuis R. Rodriguez * - last_request 81abc7381bSLuis R. Rodriguez */ 82abc7381bSLuis R. Rodriguez DEFINE_MUTEX(reg_mutex); 83abc7381bSLuis R. Rodriguez #define assert_reg_lock() WARN_ON(!mutex_is_locked(®_mutex)) 84abc7381bSLuis R. Rodriguez 85e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 86fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 87fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 88fe33eb39SLuis R. Rodriguez 89e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 90e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 91e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 92e38f8a7aSLuis R. Rodriguez 93e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 94e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 95e38f8a7aSLuis R. Rodriguez 96e38f8a7aSLuis R. Rodriguez struct reg_beacon { 97e38f8a7aSLuis R. Rodriguez struct list_head list; 98e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 99e38f8a7aSLuis R. Rodriguez }; 100e38f8a7aSLuis R. Rodriguez 101734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 102734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 103611b6a82SLuis R. Rodriguez .n_reg_rules = 5, 104734366deSJohannes Berg .alpha2 = "00", 105734366deSJohannes Berg .reg_rules = { 10668798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 10768798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 108611b6a82SLuis R. Rodriguez /* IEEE 802.11b/g, channels 12..13. No HT40 109611b6a82SLuis R. Rodriguez * channel fits here. */ 110611b6a82SLuis R. Rodriguez REG_RULE(2467-10, 2472+10, 20, 6, 20, 111611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 112611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 113611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 114611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 115611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 116611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 117611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS | 118611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 1193fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 120ec329aceSLuis R. Rodriguez REG_RULE(5180-10, 5240+10, 40, 6, 20, 1213fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1223fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 1233fc71f77SLuis R. Rodriguez 1243fc71f77SLuis R. Rodriguez /* NB: 5260 MHz - 5700 MHz requies DFS */ 1253fc71f77SLuis R. Rodriguez 1263fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 127ec329aceSLuis R. Rodriguez REG_RULE(5745-10, 5825+10, 40, 6, 20, 1283fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1293fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 130734366deSJohannes Berg } 131734366deSJohannes Berg }; 132734366deSJohannes Berg 133a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 134a3d2eaf0SJohannes Berg &world_regdom; 135734366deSJohannes Berg 1366ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 1376ee7d330SLuis R. Rodriguez 138734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 139734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 140734366deSJohannes Berg 141734366deSJohannes Berg static void reset_regdomains(void) 142734366deSJohannes Berg { 143942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 144942b25cfSJohannes Berg if (cfg80211_regdomain == cfg80211_world_regdom) 145942b25cfSJohannes Berg cfg80211_regdomain = NULL; 146942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 147942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 148942b25cfSJohannes Berg if (cfg80211_regdomain == &world_regdom) 149942b25cfSJohannes Berg cfg80211_regdomain = NULL; 150942b25cfSJohannes Berg 151734366deSJohannes Berg kfree(cfg80211_regdomain); 152734366deSJohannes Berg kfree(cfg80211_world_regdom); 153734366deSJohannes Berg 154a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 155734366deSJohannes Berg cfg80211_regdomain = NULL; 156734366deSJohannes Berg } 157734366deSJohannes Berg 158fb1fc7adSLuis R. Rodriguez /* 159fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 160fb1fc7adSLuis R. Rodriguez * core upon initialization 161fb1fc7adSLuis R. Rodriguez */ 162a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 163734366deSJohannes Berg { 164f6037d09SJohannes Berg BUG_ON(!last_request); 165734366deSJohannes Berg 166734366deSJohannes Berg reset_regdomains(); 167734366deSJohannes Berg 168734366deSJohannes Berg cfg80211_world_regdom = rd; 169734366deSJohannes Berg cfg80211_regdomain = rd; 170734366deSJohannes Berg } 171734366deSJohannes Berg 172a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 173b2e1b302SLuis R. Rodriguez { 174b2e1b302SLuis R. Rodriguez if (!alpha2) 175b2e1b302SLuis R. Rodriguez return false; 176b2e1b302SLuis R. Rodriguez if (alpha2[0] == '0' && alpha2[1] == '0') 177b2e1b302SLuis R. Rodriguez return true; 178b2e1b302SLuis R. Rodriguez return false; 179b2e1b302SLuis R. Rodriguez } 180b2e1b302SLuis R. Rodriguez 181a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 182b2e1b302SLuis R. Rodriguez { 183b2e1b302SLuis R. Rodriguez if (!alpha2) 184b2e1b302SLuis R. Rodriguez return false; 185b2e1b302SLuis R. Rodriguez if (alpha2[0] != 0 && alpha2[1] != 0) 186b2e1b302SLuis R. Rodriguez return true; 187b2e1b302SLuis R. Rodriguez return false; 188b2e1b302SLuis R. Rodriguez } 189b2e1b302SLuis R. Rodriguez 190b2e1b302SLuis R. Rodriguez static bool is_alpha_upper(char letter) 191b2e1b302SLuis R. Rodriguez { 192b2e1b302SLuis R. Rodriguez /* ASCII A - Z */ 193b2e1b302SLuis R. Rodriguez if (letter >= 65 && letter <= 90) 194b2e1b302SLuis R. Rodriguez return true; 195b2e1b302SLuis R. Rodriguez return false; 196b2e1b302SLuis R. Rodriguez } 197b2e1b302SLuis R. Rodriguez 198a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 199b2e1b302SLuis R. Rodriguez { 200b2e1b302SLuis R. Rodriguez if (!alpha2) 201b2e1b302SLuis R. Rodriguez return false; 202fb1fc7adSLuis R. Rodriguez /* 203fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 204fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 205fb1fc7adSLuis R. Rodriguez */ 206b2e1b302SLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '9') 207b2e1b302SLuis R. Rodriguez return true; 208b2e1b302SLuis R. Rodriguez return false; 209b2e1b302SLuis R. Rodriguez } 210b2e1b302SLuis R. Rodriguez 2113f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2123f2355cbSLuis R. Rodriguez { 2133f2355cbSLuis R. Rodriguez if (!alpha2) 2143f2355cbSLuis R. Rodriguez return false; 215fb1fc7adSLuis R. Rodriguez /* 216fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 2173f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 218fb1fc7adSLuis R. Rodriguez * structures 219fb1fc7adSLuis R. Rodriguez */ 2203f2355cbSLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '8') 2213f2355cbSLuis R. Rodriguez return true; 2223f2355cbSLuis R. Rodriguez return false; 2233f2355cbSLuis R. Rodriguez } 2243f2355cbSLuis R. Rodriguez 225a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 226b2e1b302SLuis R. Rodriguez { 227b2e1b302SLuis R. Rodriguez if (!alpha2) 228b2e1b302SLuis R. Rodriguez return false; 229b2e1b302SLuis R. Rodriguez if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) 230b2e1b302SLuis R. Rodriguez return true; 231b2e1b302SLuis R. Rodriguez return false; 232b2e1b302SLuis R. Rodriguez } 233b2e1b302SLuis R. Rodriguez 234a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 235b2e1b302SLuis R. Rodriguez { 236b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 237b2e1b302SLuis R. Rodriguez return false; 238b2e1b302SLuis R. Rodriguez if (alpha2_x[0] == alpha2_y[0] && 239b2e1b302SLuis R. Rodriguez alpha2_x[1] == alpha2_y[1]) 240b2e1b302SLuis R. Rodriguez return true; 241b2e1b302SLuis R. Rodriguez return false; 242b2e1b302SLuis R. Rodriguez } 243b2e1b302SLuis R. Rodriguez 24469b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 245b2e1b302SLuis R. Rodriguez { 246761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 247761cf7ecSLuis R. Rodriguez 248b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 249b2e1b302SLuis R. Rodriguez return true; 250b2e1b302SLuis R. Rodriguez if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 251b2e1b302SLuis R. Rodriguez return false; 252b2e1b302SLuis R. Rodriguez return true; 253b2e1b302SLuis R. Rodriguez } 254b2e1b302SLuis R. Rodriguez 2553f2355cbSLuis R. Rodriguez /** 2563f2355cbSLuis R. Rodriguez * country_ie_integrity_changes - tells us if the country IE has changed 2573f2355cbSLuis R. Rodriguez * @checksum: checksum of country IE of fields we are interested in 2583f2355cbSLuis R. Rodriguez * 2593f2355cbSLuis R. Rodriguez * If the country IE has not changed you can ignore it safely. This is 2603f2355cbSLuis R. Rodriguez * useful to determine if two devices are seeing two different country IEs 2613f2355cbSLuis R. Rodriguez * even on the same alpha2. Note that this will return false if no IE has 2623f2355cbSLuis R. Rodriguez * been set on the wireless core yet. 2633f2355cbSLuis R. Rodriguez */ 2643f2355cbSLuis R. Rodriguez static bool country_ie_integrity_changes(u32 checksum) 2653f2355cbSLuis R. Rodriguez { 2663f2355cbSLuis R. Rodriguez /* If no IE has been set then the checksum doesn't change */ 2673f2355cbSLuis R. Rodriguez if (unlikely(!last_request->country_ie_checksum)) 2683f2355cbSLuis R. Rodriguez return false; 2693f2355cbSLuis R. Rodriguez if (unlikely(last_request->country_ie_checksum != checksum)) 2703f2355cbSLuis R. Rodriguez return true; 2713f2355cbSLuis R. Rodriguez return false; 2723f2355cbSLuis R. Rodriguez } 2733f2355cbSLuis R. Rodriguez 2743b377ea9SJohn W. Linville static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, 2753b377ea9SJohn W. Linville const struct ieee80211_regdomain *src_regd) 2763b377ea9SJohn W. Linville { 2773b377ea9SJohn W. Linville struct ieee80211_regdomain *regd; 2783b377ea9SJohn W. Linville int size_of_regd = 0; 2793b377ea9SJohn W. Linville unsigned int i; 2803b377ea9SJohn W. Linville 2813b377ea9SJohn W. Linville size_of_regd = sizeof(struct ieee80211_regdomain) + 2823b377ea9SJohn W. Linville ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); 2833b377ea9SJohn W. Linville 2843b377ea9SJohn W. Linville regd = kzalloc(size_of_regd, GFP_KERNEL); 2853b377ea9SJohn W. Linville if (!regd) 2863b377ea9SJohn W. Linville return -ENOMEM; 2873b377ea9SJohn W. Linville 2883b377ea9SJohn W. Linville memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 2893b377ea9SJohn W. Linville 2903b377ea9SJohn W. Linville for (i = 0; i < src_regd->n_reg_rules; i++) 2913b377ea9SJohn W. Linville memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 2923b377ea9SJohn W. Linville sizeof(struct ieee80211_reg_rule)); 2933b377ea9SJohn W. Linville 2943b377ea9SJohn W. Linville *dst_regd = regd; 2953b377ea9SJohn W. Linville return 0; 2963b377ea9SJohn W. Linville } 2973b377ea9SJohn W. Linville 2983b377ea9SJohn W. Linville #ifdef CONFIG_CFG80211_INTERNAL_REGDB 2993b377ea9SJohn W. Linville struct reg_regdb_search_request { 3003b377ea9SJohn W. Linville char alpha2[2]; 3013b377ea9SJohn W. Linville struct list_head list; 3023b377ea9SJohn W. Linville }; 3033b377ea9SJohn W. Linville 3043b377ea9SJohn W. Linville static LIST_HEAD(reg_regdb_search_list); 3053b377ea9SJohn W. Linville static DEFINE_SPINLOCK(reg_regdb_search_lock); 3063b377ea9SJohn W. Linville 3073b377ea9SJohn W. Linville static void reg_regdb_search(struct work_struct *work) 3083b377ea9SJohn W. Linville { 3093b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 3103b377ea9SJohn W. Linville const struct ieee80211_regdomain *curdom, *regdom; 3113b377ea9SJohn W. Linville int i, r; 3123b377ea9SJohn W. Linville 3133b377ea9SJohn W. Linville spin_lock(®_regdb_search_lock); 3143b377ea9SJohn W. Linville while (!list_empty(®_regdb_search_list)) { 3153b377ea9SJohn W. Linville request = list_first_entry(®_regdb_search_list, 3163b377ea9SJohn W. Linville struct reg_regdb_search_request, 3173b377ea9SJohn W. Linville list); 3183b377ea9SJohn W. Linville list_del(&request->list); 3193b377ea9SJohn W. Linville 3203b377ea9SJohn W. Linville for (i=0; i<reg_regdb_size; i++) { 3213b377ea9SJohn W. Linville curdom = reg_regdb[i]; 3223b377ea9SJohn W. Linville 3233b377ea9SJohn W. Linville if (!memcmp(request->alpha2, curdom->alpha2, 2)) { 3243b377ea9SJohn W. Linville r = reg_copy_regd(®dom, curdom); 3253b377ea9SJohn W. Linville if (r) 3263b377ea9SJohn W. Linville break; 3273b377ea9SJohn W. Linville spin_unlock(®_regdb_search_lock); 3283b377ea9SJohn W. Linville mutex_lock(&cfg80211_mutex); 3293b377ea9SJohn W. Linville set_regdom(regdom); 3303b377ea9SJohn W. Linville mutex_unlock(&cfg80211_mutex); 3313b377ea9SJohn W. Linville spin_lock(®_regdb_search_lock); 3323b377ea9SJohn W. Linville break; 3333b377ea9SJohn W. Linville } 3343b377ea9SJohn W. Linville } 3353b377ea9SJohn W. Linville 3363b377ea9SJohn W. Linville kfree(request); 3373b377ea9SJohn W. Linville } 3383b377ea9SJohn W. Linville spin_unlock(®_regdb_search_lock); 3393b377ea9SJohn W. Linville } 3403b377ea9SJohn W. Linville 3413b377ea9SJohn W. Linville static DECLARE_WORK(reg_regdb_work, reg_regdb_search); 3423b377ea9SJohn W. Linville 3433b377ea9SJohn W. Linville static void reg_regdb_query(const char *alpha2) 3443b377ea9SJohn W. Linville { 3453b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 3463b377ea9SJohn W. Linville 3473b377ea9SJohn W. Linville if (!alpha2) 3483b377ea9SJohn W. Linville return; 3493b377ea9SJohn W. Linville 3503b377ea9SJohn W. Linville request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); 3513b377ea9SJohn W. Linville if (!request) 3523b377ea9SJohn W. Linville return; 3533b377ea9SJohn W. Linville 3543b377ea9SJohn W. Linville memcpy(request->alpha2, alpha2, 2); 3553b377ea9SJohn W. Linville 3563b377ea9SJohn W. Linville spin_lock(®_regdb_search_lock); 3573b377ea9SJohn W. Linville list_add_tail(&request->list, ®_regdb_search_list); 3583b377ea9SJohn W. Linville spin_unlock(®_regdb_search_lock); 3593b377ea9SJohn W. Linville 3603b377ea9SJohn W. Linville schedule_work(®_regdb_work); 3613b377ea9SJohn W. Linville } 3623b377ea9SJohn W. Linville #else 3633b377ea9SJohn W. Linville static inline void reg_regdb_query(const char *alpha2) {} 3643b377ea9SJohn W. Linville #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ 3653b377ea9SJohn W. Linville 366fb1fc7adSLuis R. Rodriguez /* 367fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 368fb1fc7adSLuis R. Rodriguez * basis in userspace. 369fb1fc7adSLuis R. Rodriguez */ 370b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 371b2e1b302SLuis R. Rodriguez { 372b2e1b302SLuis R. Rodriguez char country_env[9 + 2] = "COUNTRY="; 373b2e1b302SLuis R. Rodriguez char *envp[] = { 374b2e1b302SLuis R. Rodriguez country_env, 375b2e1b302SLuis R. Rodriguez NULL 3768318d78aSJohannes Berg }; 3778318d78aSJohannes Berg 378b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 379b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", 380b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 381b2e1b302SLuis R. Rodriguez else 382b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA to update world " 383b2e1b302SLuis R. Rodriguez "regulatory domain\n"); 3848318d78aSJohannes Berg 3853b377ea9SJohn W. Linville /* query internal regulatory database (if it exists) */ 3863b377ea9SJohn W. Linville reg_regdb_query(alpha2); 3873b377ea9SJohn W. Linville 388b2e1b302SLuis R. Rodriguez country_env[8] = alpha2[0]; 389b2e1b302SLuis R. Rodriguez country_env[9] = alpha2[1]; 3908318d78aSJohannes Berg 391b2e1b302SLuis R. Rodriguez return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); 392b2e1b302SLuis R. Rodriguez } 393b2e1b302SLuis R. Rodriguez 394b2e1b302SLuis R. Rodriguez /* Used by nl80211 before kmalloc'ing our regulatory domain */ 395a3d2eaf0SJohannes Berg bool reg_is_valid_request(const char *alpha2) 396b2e1b302SLuis R. Rodriguez { 39761405e97SLuis R. Rodriguez assert_cfg80211_lock(); 39861405e97SLuis R. Rodriguez 399f6037d09SJohannes Berg if (!last_request) 400f6037d09SJohannes Berg return false; 401f6037d09SJohannes Berg 402f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 403b2e1b302SLuis R. Rodriguez } 404b2e1b302SLuis R. Rodriguez 405b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 406a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 407b2e1b302SLuis R. Rodriguez { 408a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 409b2e1b302SLuis R. Rodriguez u32 freq_diff; 410b2e1b302SLuis R. Rodriguez 41191e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 412b2e1b302SLuis R. Rodriguez return false; 413b2e1b302SLuis R. Rodriguez 414b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 415b2e1b302SLuis R. Rodriguez return false; 416b2e1b302SLuis R. Rodriguez 417b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 418b2e1b302SLuis R. Rodriguez 419bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 420bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 421b2e1b302SLuis R. Rodriguez return false; 422b2e1b302SLuis R. Rodriguez 423b2e1b302SLuis R. Rodriguez return true; 424b2e1b302SLuis R. Rodriguez } 425b2e1b302SLuis R. Rodriguez 426a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 427b2e1b302SLuis R. Rodriguez { 428a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 429b2e1b302SLuis R. Rodriguez unsigned int i; 430b2e1b302SLuis R. Rodriguez 431b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 432b2e1b302SLuis R. Rodriguez return false; 433b2e1b302SLuis R. Rodriguez 43488dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 43588dc1c3fSLuis R. Rodriguez return false; 43688dc1c3fSLuis R. Rodriguez 437b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 438b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 439b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 440b2e1b302SLuis R. Rodriguez return false; 441b2e1b302SLuis R. Rodriguez } 442b2e1b302SLuis R. Rodriguez 443b2e1b302SLuis R. Rodriguez return true; 444b2e1b302SLuis R. Rodriguez } 445b2e1b302SLuis R. Rodriguez 446038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 447038659e7SLuis R. Rodriguez u32 center_freq_khz, 448038659e7SLuis R. Rodriguez u32 bw_khz) 449b2e1b302SLuis R. Rodriguez { 450038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 451038659e7SLuis R. Rodriguez 452038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 453038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 454038659e7SLuis R. Rodriguez 455b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 456b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 457038659e7SLuis R. Rodriguez return true; 458038659e7SLuis R. Rodriguez 459038659e7SLuis R. Rodriguez return false; 460b2e1b302SLuis R. Rodriguez } 461b2e1b302SLuis R. Rodriguez 4620c7dc45dSLuis R. Rodriguez /** 4630c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 4640c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 4650c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 4660c7dc45dSLuis R. Rodriguez * 4670c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 4680c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 4690c7dc45dSLuis R. Rodriguez * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is 4700c7dc45dSLuis R. Rodriguez * safe for now to assume that a frequency rule should not be part of a 4710c7dc45dSLuis R. Rodriguez * frequency's band if the start freq or end freq are off by more than 2 GHz. 4720c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 4730c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 4740c7dc45dSLuis R. Rodriguez **/ 4750c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 4760c7dc45dSLuis R. Rodriguez u32 freq_khz) 4770c7dc45dSLuis R. Rodriguez { 4780c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 4790c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4800c7dc45dSLuis R. Rodriguez return true; 4810c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4820c7dc45dSLuis R. Rodriguez return true; 4830c7dc45dSLuis R. Rodriguez return false; 4840c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 4850c7dc45dSLuis R. Rodriguez } 4860c7dc45dSLuis R. Rodriguez 487fb1fc7adSLuis R. Rodriguez /* 488cc5d8a37SLuis R. Rodriguez * Some APs may send a country IE triplet for each channel they 489cc5d8a37SLuis R. Rodriguez * support and while this is completely overkill and silly we still 490cc5d8a37SLuis R. Rodriguez * need to support it. We avoid making a single rule for each channel 491cc5d8a37SLuis R. Rodriguez * though and to help us with this we use this helper to find the 492cc5d8a37SLuis R. Rodriguez * actual subband end channel. These type of country IE triplet 493cc5d8a37SLuis R. Rodriguez * scenerios are handled then, all yielding two regulaotry rules from 494cc5d8a37SLuis R. Rodriguez * parsing a country IE: 495cc5d8a37SLuis R. Rodriguez * 496cc5d8a37SLuis R. Rodriguez * [1] 497cc5d8a37SLuis R. Rodriguez * [2] 498cc5d8a37SLuis R. Rodriguez * [36] 499cc5d8a37SLuis R. Rodriguez * [40] 500cc5d8a37SLuis R. Rodriguez * 501cc5d8a37SLuis R. Rodriguez * [1] 502cc5d8a37SLuis R. Rodriguez * [2-4] 503cc5d8a37SLuis R. Rodriguez * [5-12] 504cc5d8a37SLuis R. Rodriguez * [36] 505cc5d8a37SLuis R. Rodriguez * [40-44] 506cc5d8a37SLuis R. Rodriguez * 507cc5d8a37SLuis R. Rodriguez * [1-4] 508cc5d8a37SLuis R. Rodriguez * [5-7] 509cc5d8a37SLuis R. Rodriguez * [36-44] 510cc5d8a37SLuis R. Rodriguez * [48-64] 511cc5d8a37SLuis R. Rodriguez * 512cc5d8a37SLuis R. Rodriguez * [36-36] 513cc5d8a37SLuis R. Rodriguez * [40-40] 514cc5d8a37SLuis R. Rodriguez * [44-44] 515cc5d8a37SLuis R. Rodriguez * [48-48] 516cc5d8a37SLuis R. Rodriguez * [52-52] 517cc5d8a37SLuis R. Rodriguez * [56-56] 518cc5d8a37SLuis R. Rodriguez * [60-60] 519cc5d8a37SLuis R. Rodriguez * [64-64] 520cc5d8a37SLuis R. Rodriguez * [100-100] 521cc5d8a37SLuis R. Rodriguez * [104-104] 522cc5d8a37SLuis R. Rodriguez * [108-108] 523cc5d8a37SLuis R. Rodriguez * [112-112] 524cc5d8a37SLuis R. Rodriguez * [116-116] 525cc5d8a37SLuis R. Rodriguez * [120-120] 526cc5d8a37SLuis R. Rodriguez * [124-124] 527cc5d8a37SLuis R. Rodriguez * [128-128] 528cc5d8a37SLuis R. Rodriguez * [132-132] 529cc5d8a37SLuis R. Rodriguez * [136-136] 530cc5d8a37SLuis R. Rodriguez * [140-140] 531cc5d8a37SLuis R. Rodriguez * 532cc5d8a37SLuis R. Rodriguez * Returns 0 if the IE has been found to be invalid in the middle 533cc5d8a37SLuis R. Rodriguez * somewhere. 534cc5d8a37SLuis R. Rodriguez */ 535cc5d8a37SLuis R. Rodriguez static int max_subband_chan(int orig_cur_chan, 536cc5d8a37SLuis R. Rodriguez int orig_end_channel, 537cc5d8a37SLuis R. Rodriguez s8 orig_max_power, 538cc5d8a37SLuis R. Rodriguez u8 **country_ie, 539cc5d8a37SLuis R. Rodriguez u8 *country_ie_len) 540cc5d8a37SLuis R. Rodriguez { 541cc5d8a37SLuis R. Rodriguez u8 *triplets_start = *country_ie; 542cc5d8a37SLuis R. Rodriguez u8 len_at_triplet = *country_ie_len; 543cc5d8a37SLuis R. Rodriguez int end_subband_chan = orig_end_channel; 544cc5d8a37SLuis R. Rodriguez enum ieee80211_band band; 545cc5d8a37SLuis R. Rodriguez 546cc5d8a37SLuis R. Rodriguez /* 547cc5d8a37SLuis R. Rodriguez * We'll deal with padding for the caller unless 548cc5d8a37SLuis R. Rodriguez * its not immediate and we don't process any channels 549cc5d8a37SLuis R. Rodriguez */ 550cc5d8a37SLuis R. Rodriguez if (*country_ie_len == 1) { 551cc5d8a37SLuis R. Rodriguez *country_ie += 1; 552cc5d8a37SLuis R. Rodriguez *country_ie_len -= 1; 553cc5d8a37SLuis R. Rodriguez return orig_end_channel; 554cc5d8a37SLuis R. Rodriguez } 555cc5d8a37SLuis R. Rodriguez 556cc5d8a37SLuis R. Rodriguez /* Move to the next triplet and then start search */ 557cc5d8a37SLuis R. Rodriguez *country_ie += 3; 558cc5d8a37SLuis R. Rodriguez *country_ie_len -= 3; 559cc5d8a37SLuis R. Rodriguez 560cc5d8a37SLuis R. Rodriguez if (orig_cur_chan <= 14) 561cc5d8a37SLuis R. Rodriguez band = IEEE80211_BAND_2GHZ; 562cc5d8a37SLuis R. Rodriguez else 563cc5d8a37SLuis R. Rodriguez band = IEEE80211_BAND_5GHZ; 564cc5d8a37SLuis R. Rodriguez 565cc5d8a37SLuis R. Rodriguez while (*country_ie_len >= 3) { 566cc5d8a37SLuis R. Rodriguez int end_channel = 0; 567cc5d8a37SLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 568cc5d8a37SLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) *country_ie; 569cc5d8a37SLuis R. Rodriguez int cur_channel = 0, next_expected_chan; 570cc5d8a37SLuis R. Rodriguez enum ieee80211_band next_band = IEEE80211_BAND_2GHZ; 571cc5d8a37SLuis R. Rodriguez 572cc5d8a37SLuis R. Rodriguez /* means last triplet is completely unrelated to this one */ 573cc5d8a37SLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 574cc5d8a37SLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 575cc5d8a37SLuis R. Rodriguez *country_ie -= 3; 576cc5d8a37SLuis R. Rodriguez *country_ie_len += 3; 577cc5d8a37SLuis R. Rodriguez break; 578cc5d8a37SLuis R. Rodriguez } 579cc5d8a37SLuis R. Rodriguez 580cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel == 0) { 581cc5d8a37SLuis R. Rodriguez *country_ie += 1; 582cc5d8a37SLuis R. Rodriguez *country_ie_len -= 1; 583cc5d8a37SLuis R. Rodriguez if (*country_ie_len != 0) 584cc5d8a37SLuis R. Rodriguez return 0; 585cc5d8a37SLuis R. Rodriguez break; 586cc5d8a37SLuis R. Rodriguez } 587cc5d8a37SLuis R. Rodriguez 588cc5d8a37SLuis R. Rodriguez /* Monitonically increasing channel order */ 589cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel <= end_subband_chan) 590cc5d8a37SLuis R. Rodriguez return 0; 591cc5d8a37SLuis R. Rodriguez 592cc5d8a37SLuis R. Rodriguez /* 2 GHz */ 593cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel <= 14) { 594cc5d8a37SLuis R. Rodriguez end_channel = triplet->chans.first_channel + 595cc5d8a37SLuis R. Rodriguez triplet->chans.num_channels - 1; 596cc5d8a37SLuis R. Rodriguez } 597cc5d8a37SLuis R. Rodriguez else { 598cc5d8a37SLuis R. Rodriguez end_channel = triplet->chans.first_channel + 599cc5d8a37SLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 600cc5d8a37SLuis R. Rodriguez next_band = IEEE80211_BAND_5GHZ; 601cc5d8a37SLuis R. Rodriguez } 602cc5d8a37SLuis R. Rodriguez 603cc5d8a37SLuis R. Rodriguez if (band != next_band) { 604cc5d8a37SLuis R. Rodriguez *country_ie -= 3; 605cc5d8a37SLuis R. Rodriguez *country_ie_len += 3; 606cc5d8a37SLuis R. Rodriguez break; 607cc5d8a37SLuis R. Rodriguez } 608cc5d8a37SLuis R. Rodriguez 609cc5d8a37SLuis R. Rodriguez if (orig_max_power != triplet->chans.max_power) { 610cc5d8a37SLuis R. Rodriguez *country_ie -= 3; 611cc5d8a37SLuis R. Rodriguez *country_ie_len += 3; 612cc5d8a37SLuis R. Rodriguez break; 613cc5d8a37SLuis R. Rodriguez } 614cc5d8a37SLuis R. Rodriguez 615cc5d8a37SLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 616cc5d8a37SLuis R. Rodriguez 617cc5d8a37SLuis R. Rodriguez /* The key is finding the right next expected channel */ 618cc5d8a37SLuis R. Rodriguez if (band == IEEE80211_BAND_2GHZ) 619cc5d8a37SLuis R. Rodriguez next_expected_chan = end_subband_chan + 1; 620cc5d8a37SLuis R. Rodriguez else 621cc5d8a37SLuis R. Rodriguez next_expected_chan = end_subband_chan + 4; 622cc5d8a37SLuis R. Rodriguez 623cc5d8a37SLuis R. Rodriguez if (cur_channel != next_expected_chan) { 624cc5d8a37SLuis R. Rodriguez *country_ie -= 3; 625cc5d8a37SLuis R. Rodriguez *country_ie_len += 3; 626cc5d8a37SLuis R. Rodriguez break; 627cc5d8a37SLuis R. Rodriguez } 628cc5d8a37SLuis R. Rodriguez 629cc5d8a37SLuis R. Rodriguez end_subband_chan = end_channel; 630cc5d8a37SLuis R. Rodriguez 631cc5d8a37SLuis R. Rodriguez /* Move to the next one */ 632cc5d8a37SLuis R. Rodriguez *country_ie += 3; 633cc5d8a37SLuis R. Rodriguez *country_ie_len -= 3; 634cc5d8a37SLuis R. Rodriguez 635cc5d8a37SLuis R. Rodriguez /* 636cc5d8a37SLuis R. Rodriguez * Padding needs to be dealt with if we processed 637cc5d8a37SLuis R. Rodriguez * some channels. 638cc5d8a37SLuis R. Rodriguez */ 639cc5d8a37SLuis R. Rodriguez if (*country_ie_len == 1) { 640cc5d8a37SLuis R. Rodriguez *country_ie += 1; 641cc5d8a37SLuis R. Rodriguez *country_ie_len -= 1; 642cc5d8a37SLuis R. Rodriguez break; 643cc5d8a37SLuis R. Rodriguez } 644cc5d8a37SLuis R. Rodriguez 645cc5d8a37SLuis R. Rodriguez /* If seen, the IE is invalid */ 646cc5d8a37SLuis R. Rodriguez if (*country_ie_len == 2) 647cc5d8a37SLuis R. Rodriguez return 0; 648cc5d8a37SLuis R. Rodriguez } 649cc5d8a37SLuis R. Rodriguez 650cc5d8a37SLuis R. Rodriguez if (end_subband_chan == orig_end_channel) { 651cc5d8a37SLuis R. Rodriguez *country_ie = triplets_start; 652cc5d8a37SLuis R. Rodriguez *country_ie_len = len_at_triplet; 653cc5d8a37SLuis R. Rodriguez return orig_end_channel; 654cc5d8a37SLuis R. Rodriguez } 655cc5d8a37SLuis R. Rodriguez 656cc5d8a37SLuis R. Rodriguez return end_subband_chan; 657cc5d8a37SLuis R. Rodriguez } 658cc5d8a37SLuis R. Rodriguez 659cc5d8a37SLuis R. Rodriguez /* 660fb1fc7adSLuis R. Rodriguez * Converts a country IE to a regulatory domain. A regulatory domain 6613f2355cbSLuis R. Rodriguez * structure has a lot of information which the IE doesn't yet have, 6623f2355cbSLuis R. Rodriguez * so for the other values we use upper max values as we will intersect 663fb1fc7adSLuis R. Rodriguez * with our userspace regulatory agent to get lower bounds. 664fb1fc7adSLuis R. Rodriguez */ 6653f2355cbSLuis R. Rodriguez static struct ieee80211_regdomain *country_ie_2_rd( 6663f2355cbSLuis R. Rodriguez u8 *country_ie, 6673f2355cbSLuis R. Rodriguez u8 country_ie_len, 6683f2355cbSLuis R. Rodriguez u32 *checksum) 6693f2355cbSLuis R. Rodriguez { 6703f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 6713f2355cbSLuis R. Rodriguez unsigned int i = 0; 6723f2355cbSLuis R. Rodriguez char alpha2[2]; 6733f2355cbSLuis R. Rodriguez u32 flags = 0; 6743f2355cbSLuis R. Rodriguez u32 num_rules = 0, size_of_regd = 0; 6753f2355cbSLuis R. Rodriguez u8 *triplets_start = NULL; 6763f2355cbSLuis R. Rodriguez u8 len_at_triplet = 0; 6773f2355cbSLuis R. Rodriguez /* the last channel we have registered in a subband (triplet) */ 6783f2355cbSLuis R. Rodriguez int last_sub_max_channel = 0; 6793f2355cbSLuis R. Rodriguez 6803f2355cbSLuis R. Rodriguez *checksum = 0xDEADBEEF; 6813f2355cbSLuis R. Rodriguez 6823f2355cbSLuis R. Rodriguez /* Country IE requirements */ 6833f2355cbSLuis R. Rodriguez BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || 6843f2355cbSLuis R. Rodriguez country_ie_len & 0x01); 6853f2355cbSLuis R. Rodriguez 6863f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 6873f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 6883f2355cbSLuis R. Rodriguez 6893f2355cbSLuis R. Rodriguez /* 6903f2355cbSLuis R. Rodriguez * Third octet can be: 6913f2355cbSLuis R. Rodriguez * 'I' - Indoor 6923f2355cbSLuis R. Rodriguez * 'O' - Outdoor 6933f2355cbSLuis R. Rodriguez * 6943f2355cbSLuis R. Rodriguez * anything else we assume is no restrictions 6953f2355cbSLuis R. Rodriguez */ 6963f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 6973f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_OUTDOOR; 6983f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 6993f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_INDOOR; 7003f2355cbSLuis R. Rodriguez 7013f2355cbSLuis R. Rodriguez country_ie += 3; 7023f2355cbSLuis R. Rodriguez country_ie_len -= 3; 7033f2355cbSLuis R. Rodriguez 7043f2355cbSLuis R. Rodriguez triplets_start = country_ie; 7053f2355cbSLuis R. Rodriguez len_at_triplet = country_ie_len; 7063f2355cbSLuis R. Rodriguez 7073f2355cbSLuis R. Rodriguez *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); 7083f2355cbSLuis R. Rodriguez 709fb1fc7adSLuis R. Rodriguez /* 710fb1fc7adSLuis R. Rodriguez * We need to build a reg rule for each triplet, but first we must 7113f2355cbSLuis R. Rodriguez * calculate the number of reg rules we will need. We will need one 712fb1fc7adSLuis R. Rodriguez * for each channel subband 713fb1fc7adSLuis R. Rodriguez */ 7143f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 715615aab4bSLuis R. Rodriguez int end_channel = 0; 7163f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 7173f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 7183f2355cbSLuis R. Rodriguez int cur_sub_max_channel = 0, cur_channel = 0; 7193f2355cbSLuis R. Rodriguez 7203f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 7213f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 7223f2355cbSLuis R. Rodriguez country_ie += 3; 7233f2355cbSLuis R. Rodriguez country_ie_len -= 3; 7243f2355cbSLuis R. Rodriguez continue; 7253f2355cbSLuis R. Rodriguez } 7263f2355cbSLuis R. Rodriguez 727cc5d8a37SLuis R. Rodriguez /* 728cc5d8a37SLuis R. Rodriguez * APs can add padding to make length divisible 729cc5d8a37SLuis R. Rodriguez * by two, required by the spec. 730cc5d8a37SLuis R. Rodriguez */ 731cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel == 0) { 732cc5d8a37SLuis R. Rodriguez country_ie++; 733cc5d8a37SLuis R. Rodriguez country_ie_len--; 734cc5d8a37SLuis R. Rodriguez /* This is expected to be at the very end only */ 735cc5d8a37SLuis R. Rodriguez if (country_ie_len != 0) 736cc5d8a37SLuis R. Rodriguez return NULL; 737cc5d8a37SLuis R. Rodriguez break; 738cc5d8a37SLuis R. Rodriguez } 739cc5d8a37SLuis R. Rodriguez 740615aab4bSLuis R. Rodriguez /* 2 GHz */ 741615aab4bSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 742615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 743e99c7cd5SLuis R. Rodriguez triplet->chans.num_channels - 1; 744615aab4bSLuis R. Rodriguez else 745615aab4bSLuis R. Rodriguez /* 746615aab4bSLuis R. Rodriguez * 5 GHz -- For example in country IEs if the first 747615aab4bSLuis R. Rodriguez * channel given is 36 and the number of channels is 4 748615aab4bSLuis R. Rodriguez * then the individual channel numbers defined for the 749615aab4bSLuis R. Rodriguez * 5 GHz PHY by these parameters are: 36, 40, 44, and 48 750615aab4bSLuis R. Rodriguez * and not 36, 37, 38, 39. 751615aab4bSLuis R. Rodriguez * 752615aab4bSLuis R. Rodriguez * See: http://tinyurl.com/11d-clarification 753615aab4bSLuis R. Rodriguez */ 754615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 755615aab4bSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 756615aab4bSLuis R. Rodriguez 7573f2355cbSLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 758cc5d8a37SLuis R. Rodriguez 759cc5d8a37SLuis R. Rodriguez /* 760cc5d8a37SLuis R. Rodriguez * Enhancement for APs that send a triplet for every channel 761cc5d8a37SLuis R. Rodriguez * or for whatever reason sends triplets with multiple channels 762cc5d8a37SLuis R. Rodriguez * separated when in fact they should be together. 763cc5d8a37SLuis R. Rodriguez */ 764cc5d8a37SLuis R. Rodriguez end_channel = max_subband_chan(cur_channel, 765cc5d8a37SLuis R. Rodriguez end_channel, 766cc5d8a37SLuis R. Rodriguez triplet->chans.max_power, 767cc5d8a37SLuis R. Rodriguez &country_ie, 768cc5d8a37SLuis R. Rodriguez &country_ie_len); 769cc5d8a37SLuis R. Rodriguez if (!end_channel) 770cc5d8a37SLuis R. Rodriguez return NULL; 771cc5d8a37SLuis R. Rodriguez 772615aab4bSLuis R. Rodriguez cur_sub_max_channel = end_channel; 7733f2355cbSLuis R. Rodriguez 7743f2355cbSLuis R. Rodriguez /* Basic sanity check */ 7753f2355cbSLuis R. Rodriguez if (cur_sub_max_channel < cur_channel) 7763f2355cbSLuis R. Rodriguez return NULL; 7773f2355cbSLuis R. Rodriguez 778fb1fc7adSLuis R. Rodriguez /* 779fb1fc7adSLuis R. Rodriguez * Do not allow overlapping channels. Also channels 7803f2355cbSLuis R. Rodriguez * passed in each subband must be monotonically 781fb1fc7adSLuis R. Rodriguez * increasing 782fb1fc7adSLuis R. Rodriguez */ 7833f2355cbSLuis R. Rodriguez if (last_sub_max_channel) { 7843f2355cbSLuis R. Rodriguez if (cur_channel <= last_sub_max_channel) 7853f2355cbSLuis R. Rodriguez return NULL; 7863f2355cbSLuis R. Rodriguez if (cur_sub_max_channel <= last_sub_max_channel) 7873f2355cbSLuis R. Rodriguez return NULL; 7883f2355cbSLuis R. Rodriguez } 7893f2355cbSLuis R. Rodriguez 790fb1fc7adSLuis R. Rodriguez /* 791fb1fc7adSLuis R. Rodriguez * When dot11RegulatoryClassesRequired is supported 7923f2355cbSLuis R. Rodriguez * we can throw ext triplets as part of this soup, 7933f2355cbSLuis R. Rodriguez * for now we don't care when those change as we 794fb1fc7adSLuis R. Rodriguez * don't support them 795fb1fc7adSLuis R. Rodriguez */ 7963f2355cbSLuis R. Rodriguez *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | 7973f2355cbSLuis R. Rodriguez ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | 7983f2355cbSLuis R. Rodriguez ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); 7993f2355cbSLuis R. Rodriguez 8003f2355cbSLuis R. Rodriguez last_sub_max_channel = cur_sub_max_channel; 8013f2355cbSLuis R. Rodriguez 802cc5d8a37SLuis R. Rodriguez num_rules++; 803cc5d8a37SLuis R. Rodriguez 804cc5d8a37SLuis R. Rodriguez if (country_ie_len >= 3) { 8053f2355cbSLuis R. Rodriguez country_ie += 3; 8063f2355cbSLuis R. Rodriguez country_ie_len -= 3; 807cc5d8a37SLuis R. Rodriguez } 8083f2355cbSLuis R. Rodriguez 809fb1fc7adSLuis R. Rodriguez /* 810fb1fc7adSLuis R. Rodriguez * Note: this is not a IEEE requirement but 811fb1fc7adSLuis R. Rodriguez * simply a memory requirement 812fb1fc7adSLuis R. Rodriguez */ 8133f2355cbSLuis R. Rodriguez if (num_rules > NL80211_MAX_SUPP_REG_RULES) 8143f2355cbSLuis R. Rodriguez return NULL; 8153f2355cbSLuis R. Rodriguez } 8163f2355cbSLuis R. Rodriguez 8173f2355cbSLuis R. Rodriguez country_ie = triplets_start; 8183f2355cbSLuis R. Rodriguez country_ie_len = len_at_triplet; 8193f2355cbSLuis R. Rodriguez 8203f2355cbSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 8213f2355cbSLuis R. Rodriguez (num_rules * sizeof(struct ieee80211_reg_rule)); 8223f2355cbSLuis R. Rodriguez 8233f2355cbSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 8243f2355cbSLuis R. Rodriguez if (!rd) 8253f2355cbSLuis R. Rodriguez return NULL; 8263f2355cbSLuis R. Rodriguez 8273f2355cbSLuis R. Rodriguez rd->n_reg_rules = num_rules; 8283f2355cbSLuis R. Rodriguez rd->alpha2[0] = alpha2[0]; 8293f2355cbSLuis R. Rodriguez rd->alpha2[1] = alpha2[1]; 8303f2355cbSLuis R. Rodriguez 8313f2355cbSLuis R. Rodriguez /* This time around we fill in the rd */ 8323f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 83302e68a3dSLuis R. Rodriguez int end_channel = 0; 8343f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 8353f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 8363f2355cbSLuis R. Rodriguez struct ieee80211_reg_rule *reg_rule = NULL; 8373f2355cbSLuis R. Rodriguez struct ieee80211_freq_range *freq_range = NULL; 8383f2355cbSLuis R. Rodriguez struct ieee80211_power_rule *power_rule = NULL; 8393f2355cbSLuis R. Rodriguez 840fb1fc7adSLuis R. Rodriguez /* 841fb1fc7adSLuis R. Rodriguez * Must parse if dot11RegulatoryClassesRequired is true, 842fb1fc7adSLuis R. Rodriguez * we don't support this yet 843fb1fc7adSLuis R. Rodriguez */ 8443f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 8453f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 8463f2355cbSLuis R. Rodriguez country_ie += 3; 8473f2355cbSLuis R. Rodriguez country_ie_len -= 3; 8483f2355cbSLuis R. Rodriguez continue; 8493f2355cbSLuis R. Rodriguez } 8503f2355cbSLuis R. Rodriguez 851cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel == 0) { 852cc5d8a37SLuis R. Rodriguez country_ie++; 853cc5d8a37SLuis R. Rodriguez country_ie_len--; 854cc5d8a37SLuis R. Rodriguez break; 855cc5d8a37SLuis R. Rodriguez } 856cc5d8a37SLuis R. Rodriguez 8573f2355cbSLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 8583f2355cbSLuis R. Rodriguez freq_range = ®_rule->freq_range; 8593f2355cbSLuis R. Rodriguez power_rule = ®_rule->power_rule; 8603f2355cbSLuis R. Rodriguez 8613f2355cbSLuis R. Rodriguez reg_rule->flags = flags; 8623f2355cbSLuis R. Rodriguez 86302e68a3dSLuis R. Rodriguez /* 2 GHz */ 86402e68a3dSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 86502e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 866e99c7cd5SLuis R. Rodriguez triplet->chans.num_channels -1; 86702e68a3dSLuis R. Rodriguez else 86802e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 86902e68a3dSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 87002e68a3dSLuis R. Rodriguez 871cc5d8a37SLuis R. Rodriguez end_channel = max_subband_chan(triplet->chans.first_channel, 872cc5d8a37SLuis R. Rodriguez end_channel, 873cc5d8a37SLuis R. Rodriguez triplet->chans.max_power, 874cc5d8a37SLuis R. Rodriguez &country_ie, 875cc5d8a37SLuis R. Rodriguez &country_ie_len); 876cc5d8a37SLuis R. Rodriguez 877fb1fc7adSLuis R. Rodriguez /* 878fb1fc7adSLuis R. Rodriguez * The +10 is since the regulatory domain expects 8793f2355cbSLuis R. Rodriguez * the actual band edge, not the center of freq for 8803f2355cbSLuis R. Rodriguez * its start and end freqs, assuming 20 MHz bandwidth on 881fb1fc7adSLuis R. Rodriguez * the channels passed 882fb1fc7adSLuis R. Rodriguez */ 8833f2355cbSLuis R. Rodriguez freq_range->start_freq_khz = 8843f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 8853f2355cbSLuis R. Rodriguez triplet->chans.first_channel) - 10); 8863f2355cbSLuis R. Rodriguez freq_range->end_freq_khz = 8873f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 88802e68a3dSLuis R. Rodriguez end_channel) + 10); 8893f2355cbSLuis R. Rodriguez 890fb1fc7adSLuis R. Rodriguez /* 891fb1fc7adSLuis R. Rodriguez * These are large arbitrary values we use to intersect later. 892fb1fc7adSLuis R. Rodriguez * Increment this if we ever support >= 40 MHz channels 893fb1fc7adSLuis R. Rodriguez * in IEEE 802.11 894fb1fc7adSLuis R. Rodriguez */ 8953f2355cbSLuis R. Rodriguez freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); 8963f2355cbSLuis R. Rodriguez power_rule->max_antenna_gain = DBI_TO_MBI(100); 89708030db6SLuis R. Rodriguez power_rule->max_eirp = DBM_TO_MBM(triplet->chans.max_power); 8983f2355cbSLuis R. Rodriguez 899cc5d8a37SLuis R. Rodriguez i++; 900cc5d8a37SLuis R. Rodriguez 901cc5d8a37SLuis R. Rodriguez if (country_ie_len >= 3) { 9023f2355cbSLuis R. Rodriguez country_ie += 3; 9033f2355cbSLuis R. Rodriguez country_ie_len -= 3; 904cc5d8a37SLuis R. Rodriguez } 9053f2355cbSLuis R. Rodriguez 9063f2355cbSLuis R. Rodriguez BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); 9073f2355cbSLuis R. Rodriguez } 9083f2355cbSLuis R. Rodriguez 9093f2355cbSLuis R. Rodriguez return rd; 9103f2355cbSLuis R. Rodriguez } 9113f2355cbSLuis R. Rodriguez 9123f2355cbSLuis R. Rodriguez 913fb1fc7adSLuis R. Rodriguez /* 914fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 915fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 916fb1fc7adSLuis R. Rodriguez */ 9179c96477dSLuis R. Rodriguez static int reg_rules_intersect( 9189c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 9199c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 9209c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 9219c96477dSLuis R. Rodriguez { 9229c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 9239c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 9249c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 9259c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 9269c96477dSLuis R. Rodriguez u32 freq_diff; 9279c96477dSLuis R. Rodriguez 9289c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 9299c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 9309c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 9319c96477dSLuis R. Rodriguez 9329c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 9339c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 9349c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 9359c96477dSLuis R. Rodriguez 9369c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 9379c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 9389c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 9399c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 9409c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 9419c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 9429c96477dSLuis R. Rodriguez 9439c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 9449c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 9459c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 9469c96477dSLuis R. Rodriguez 9479c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 9489c96477dSLuis R. Rodriguez power_rule2->max_eirp); 9499c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 9509c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 9519c96477dSLuis R. Rodriguez 9529c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 9539c96477dSLuis R. Rodriguez 9549c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 9559c96477dSLuis R. Rodriguez return -EINVAL; 9569c96477dSLuis R. Rodriguez 9579c96477dSLuis R. Rodriguez return 0; 9589c96477dSLuis R. Rodriguez } 9599c96477dSLuis R. Rodriguez 9609c96477dSLuis R. Rodriguez /** 9619c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 9629c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 9639c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 9649c96477dSLuis R. Rodriguez * 9659c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 9669c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 9679c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 9689c96477dSLuis R. Rodriguez * 9699c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 9709c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 9719c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 9729c96477dSLuis R. Rodriguez */ 9739c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 9749c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 9759c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 9769c96477dSLuis R. Rodriguez { 9779c96477dSLuis R. Rodriguez int r, size_of_regd; 9789c96477dSLuis R. Rodriguez unsigned int x, y; 9799c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 9809c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 9819c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 9829c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 9839c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 9849c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 9859c96477dSLuis R. Rodriguez 9869c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 9879c96477dSLuis R. Rodriguez intersected_rule = &irule; 9889c96477dSLuis R. Rodriguez 9899c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 9909c96477dSLuis R. Rodriguez 9919c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 9929c96477dSLuis R. Rodriguez return NULL; 9939c96477dSLuis R. Rodriguez 994fb1fc7adSLuis R. Rodriguez /* 995fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 9969c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 9979c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 9989c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 999fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 1000fb1fc7adSLuis R. Rodriguez */ 10019c96477dSLuis R. Rodriguez 10029c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 10039c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 10049c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 10059c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 10069c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 10079c96477dSLuis R. Rodriguez intersected_rule)) 10089c96477dSLuis R. Rodriguez num_rules++; 10099c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 10109c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 10119c96477dSLuis R. Rodriguez } 10129c96477dSLuis R. Rodriguez } 10139c96477dSLuis R. Rodriguez 10149c96477dSLuis R. Rodriguez if (!num_rules) 10159c96477dSLuis R. Rodriguez return NULL; 10169c96477dSLuis R. Rodriguez 10179c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 10189c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 10199c96477dSLuis R. Rodriguez 10209c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 10219c96477dSLuis R. Rodriguez if (!rd) 10229c96477dSLuis R. Rodriguez return NULL; 10239c96477dSLuis R. Rodriguez 10249c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 10259c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 10269c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 10279c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 1028fb1fc7adSLuis R. Rodriguez /* 1029fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 10309c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 1031fb1fc7adSLuis R. Rodriguez * a memcpy() 1032fb1fc7adSLuis R. Rodriguez */ 10339c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 10349c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 10359c96477dSLuis R. Rodriguez intersected_rule); 1036fb1fc7adSLuis R. Rodriguez /* 1037fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 1038fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 1039fb1fc7adSLuis R. Rodriguez */ 10409c96477dSLuis R. Rodriguez if (r) 10419c96477dSLuis R. Rodriguez continue; 10429c96477dSLuis R. Rodriguez rule_idx++; 10439c96477dSLuis R. Rodriguez } 10449c96477dSLuis R. Rodriguez } 10459c96477dSLuis R. Rodriguez 10469c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 10479c96477dSLuis R. Rodriguez kfree(rd); 10489c96477dSLuis R. Rodriguez return NULL; 10499c96477dSLuis R. Rodriguez } 10509c96477dSLuis R. Rodriguez 10519c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 10529c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 10539c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 10549c96477dSLuis R. Rodriguez 10559c96477dSLuis R. Rodriguez return rd; 10569c96477dSLuis R. Rodriguez } 10579c96477dSLuis R. Rodriguez 1058fb1fc7adSLuis R. Rodriguez /* 1059fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 1060fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 1061fb1fc7adSLuis R. Rodriguez */ 1062b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 1063b2e1b302SLuis R. Rodriguez { 1064b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 1065b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 1066b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 1067b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 1068b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 1069b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 1070b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 1071b2e1b302SLuis R. Rodriguez return channel_flags; 1072b2e1b302SLuis R. Rodriguez } 1073b2e1b302SLuis R. Rodriguez 10741fa25e41SLuis R. Rodriguez static int freq_reg_info_regd(struct wiphy *wiphy, 10751fa25e41SLuis R. Rodriguez u32 center_freq, 1076038659e7SLuis R. Rodriguez u32 desired_bw_khz, 10771fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 10781fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *custom_regd) 10798318d78aSJohannes Berg { 10808318d78aSJohannes Berg int i; 10810c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 10823e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *regd; 1083038659e7SLuis R. Rodriguez bool bw_fits = false; 1084038659e7SLuis R. Rodriguez 1085038659e7SLuis R. Rodriguez if (!desired_bw_khz) 1086038659e7SLuis R. Rodriguez desired_bw_khz = MHZ_TO_KHZ(20); 10878318d78aSJohannes Berg 10881fa25e41SLuis R. Rodriguez regd = custom_regd ? custom_regd : cfg80211_regdomain; 10893e0c3ff3SLuis R. Rodriguez 1090fb1fc7adSLuis R. Rodriguez /* 1091fb1fc7adSLuis R. Rodriguez * Follow the driver's regulatory domain, if present, unless a country 1092fb1fc7adSLuis R. Rodriguez * IE has been processed or a user wants to help complaince further 1093fb1fc7adSLuis R. Rodriguez */ 10947db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 10957db90f4aSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_USER && 10963e0c3ff3SLuis R. Rodriguez wiphy->regd) 10973e0c3ff3SLuis R. Rodriguez regd = wiphy->regd; 10983e0c3ff3SLuis R. Rodriguez 10993e0c3ff3SLuis R. Rodriguez if (!regd) 1100b2e1b302SLuis R. Rodriguez return -EINVAL; 1101b2e1b302SLuis R. Rodriguez 11023e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 1103b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 1104b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 1105b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 1106b2e1b302SLuis R. Rodriguez 11073e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 1108b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 1109b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 11100c7dc45dSLuis R. Rodriguez 1111fb1fc7adSLuis R. Rodriguez /* 1112fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 11130c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 1114fb1fc7adSLuis R. Rodriguez * not overwrite it once found 1115fb1fc7adSLuis R. Rodriguez */ 11160c7dc45dSLuis R. Rodriguez if (!band_rule_found) 11170c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 11180c7dc45dSLuis R. Rodriguez 1119038659e7SLuis R. Rodriguez bw_fits = reg_does_bw_fit(fr, 1120038659e7SLuis R. Rodriguez center_freq, 1121038659e7SLuis R. Rodriguez desired_bw_khz); 11220c7dc45dSLuis R. Rodriguez 1123038659e7SLuis R. Rodriguez if (band_rule_found && bw_fits) { 1124b2e1b302SLuis R. Rodriguez *reg_rule = rr; 1125038659e7SLuis R. Rodriguez return 0; 11268318d78aSJohannes Berg } 11278318d78aSJohannes Berg } 11288318d78aSJohannes Berg 11290c7dc45dSLuis R. Rodriguez if (!band_rule_found) 11300c7dc45dSLuis R. Rodriguez return -ERANGE; 11310c7dc45dSLuis R. Rodriguez 1132038659e7SLuis R. Rodriguez return -EINVAL; 1133b2e1b302SLuis R. Rodriguez } 113434f57347SLuis R. Rodriguez EXPORT_SYMBOL(freq_reg_info); 1135b2e1b302SLuis R. Rodriguez 1136038659e7SLuis R. Rodriguez int freq_reg_info(struct wiphy *wiphy, 1137038659e7SLuis R. Rodriguez u32 center_freq, 1138038659e7SLuis R. Rodriguez u32 desired_bw_khz, 11391fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 11401fa25e41SLuis R. Rodriguez { 1141ac46d48eSLuis R. Rodriguez assert_cfg80211_lock(); 1142038659e7SLuis R. Rodriguez return freq_reg_info_regd(wiphy, 1143038659e7SLuis R. Rodriguez center_freq, 1144038659e7SLuis R. Rodriguez desired_bw_khz, 1145038659e7SLuis R. Rodriguez reg_rule, 1146038659e7SLuis R. Rodriguez NULL); 11471fa25e41SLuis R. Rodriguez } 1148b2e1b302SLuis R. Rodriguez 1149038659e7SLuis R. Rodriguez /* 1150038659e7SLuis R. Rodriguez * Note that right now we assume the desired channel bandwidth 1151038659e7SLuis R. Rodriguez * is always 20 MHz for each individual channel (HT40 uses 20 MHz 1152038659e7SLuis R. Rodriguez * per channel, the primary and the extension channel). To support 1153038659e7SLuis R. Rodriguez * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a 1154038659e7SLuis R. Rodriguez * new ieee80211_channel.target_bw and re run the regulatory check 1155038659e7SLuis R. Rodriguez * on the wiphy with the target_bw specified. Then we can simply use 1156038659e7SLuis R. Rodriguez * that below for the desired_bw_khz below. 1157038659e7SLuis R. Rodriguez */ 1158a92a3ce7SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, 1159a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 1160b2e1b302SLuis R. Rodriguez { 1161b2e1b302SLuis R. Rodriguez int r; 1162038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 1163038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 1164b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 1165b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1166038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 1167a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1168a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 1169fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 1170a92a3ce7SLuis R. Rodriguez 1171761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1172761cf7ecSLuis R. Rodriguez 1173806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1174806a9e39SLuis R. Rodriguez 1175a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 1176a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 1177a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1178a92a3ce7SLuis R. Rodriguez 1179a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 1180b2e1b302SLuis R. Rodriguez 1181038659e7SLuis R. Rodriguez r = freq_reg_info(wiphy, 1182038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 1183038659e7SLuis R. Rodriguez desired_bw_khz, 1184038659e7SLuis R. Rodriguez ®_rule); 1185b2e1b302SLuis R. Rodriguez 1186b2e1b302SLuis R. Rodriguez if (r) { 1187fb1fc7adSLuis R. Rodriguez /* 1188fb1fc7adSLuis R. Rodriguez * This means no regulatory rule was found in the country IE 11890c7dc45dSLuis R. Rodriguez * with a frequency range on the center_freq's band, since 11900c7dc45dSLuis R. Rodriguez * IEEE-802.11 allows for a country IE to have a subset of the 11910c7dc45dSLuis R. Rodriguez * regulatory information provided in a country we ignore 11920c7dc45dSLuis R. Rodriguez * disabling the channel unless at least one reg rule was 11930c7dc45dSLuis R. Rodriguez * found on the center_freq's band. For details see this 11940c7dc45dSLuis R. Rodriguez * clarification: 11950c7dc45dSLuis R. Rodriguez * 11960c7dc45dSLuis R. Rodriguez * http://tinyurl.com/11d-clarification 11970c7dc45dSLuis R. Rodriguez */ 11980c7dc45dSLuis R. Rodriguez if (r == -ERANGE && 11997db90f4aSLuis R. Rodriguez last_request->initiator == 12007db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 12014113f751SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Leaving channel %d MHz " 12020c7dc45dSLuis R. Rodriguez "intact on %s - no rule found in band on " 12030c7dc45dSLuis R. Rodriguez "Country IE\n", 12040c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 12050c7dc45dSLuis R. Rodriguez } else { 1206fb1fc7adSLuis R. Rodriguez /* 1207fb1fc7adSLuis R. Rodriguez * In this case we know the country IE has at least one reg rule 1208fb1fc7adSLuis R. Rodriguez * for the band so we respect its band definitions 1209fb1fc7adSLuis R. Rodriguez */ 12107db90f4aSLuis R. Rodriguez if (last_request->initiator == 12117db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) 12124113f751SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Disabling " 12130c7dc45dSLuis R. Rodriguez "channel %d MHz on %s due to " 12140c7dc45dSLuis R. Rodriguez "Country IE\n", 12150c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 12168318d78aSJohannes Berg flags |= IEEE80211_CHAN_DISABLED; 12178318d78aSJohannes Berg chan->flags = flags; 12180c7dc45dSLuis R. Rodriguez } 12198318d78aSJohannes Berg return; 12208318d78aSJohannes Berg } 12218318d78aSJohannes Berg 1222b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1223038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1224038659e7SLuis R. Rodriguez 1225038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1226038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1227b2e1b302SLuis R. Rodriguez 12287db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1229806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 12305be83de5SJohannes Berg request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { 1231fb1fc7adSLuis R. Rodriguez /* 1232fb1fc7adSLuis R. Rodriguez * This gaurantees the driver's requested regulatory domain 1233f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 1234fb1fc7adSLuis R. Rodriguez * settings 1235fb1fc7adSLuis R. Rodriguez */ 1236f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 1237038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 1238f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 1239f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1240f976376dSLuis R. Rodriguez chan->max_power = chan->orig_mpwr = 1241f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 1242f976376dSLuis R. Rodriguez return; 1243f976376dSLuis R. Rodriguez } 1244f976376dSLuis R. Rodriguez 1245038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 12468318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 1247b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 1248253898c4SJohn W. Linville if (chan->orig_mpwr) 1249b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 1250b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 1251253898c4SJohn W. Linville else 1252b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 12538318d78aSJohannes Berg } 12548318d78aSJohannes Berg 1255a92a3ce7SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) 12568318d78aSJohannes Berg { 1257a92a3ce7SLuis R. Rodriguez unsigned int i; 1258a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1259a92a3ce7SLuis R. Rodriguez 1260a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1261a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 12628318d78aSJohannes Berg 12638318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 1264a92a3ce7SLuis R. Rodriguez handle_channel(wiphy, band, i); 12658318d78aSJohannes Berg } 12668318d78aSJohannes Berg 12677db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 12687db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 126914b9815aSLuis R. Rodriguez { 127014b9815aSLuis R. Rodriguez if (!last_request) 127114b9815aSLuis R. Rodriguez return true; 12727db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 12735be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 127414b9815aSLuis R. Rodriguez return true; 1275fb1fc7adSLuis R. Rodriguez /* 1276fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1277fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1278fb1fc7adSLuis R. Rodriguez */ 12795be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && 1280f976376dSLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) 128114b9815aSLuis R. Rodriguez return true; 128214b9815aSLuis R. Rodriguez return false; 128314b9815aSLuis R. Rodriguez } 128414b9815aSLuis R. Rodriguez 12857db90f4aSLuis R. Rodriguez static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 1286b2e1b302SLuis R. Rodriguez { 128779c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1288b2e1b302SLuis R. Rodriguez 128979c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 129079c97e97SJohannes Berg wiphy_update_regulatory(&rdev->wiphy, initiator); 1291b2e1b302SLuis R. Rodriguez } 1292b2e1b302SLuis R. Rodriguez 1293e38f8a7aSLuis R. Rodriguez static void handle_reg_beacon(struct wiphy *wiphy, 1294e38f8a7aSLuis R. Rodriguez unsigned int chan_idx, 1295e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1296e38f8a7aSLuis R. Rodriguez { 1297e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1298e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 12996bad8766SLuis R. Rodriguez bool channel_changed = false; 13006bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1301e38f8a7aSLuis R. Rodriguez 1302e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1303e38f8a7aSLuis R. Rodriguez 1304e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1305e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1306e38f8a7aSLuis R. Rodriguez 1307e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1308e38f8a7aSLuis R. Rodriguez return; 1309e38f8a7aSLuis R. Rodriguez 13106bad8766SLuis R. Rodriguez if (chan->beacon_found) 13116bad8766SLuis R. Rodriguez return; 13126bad8766SLuis R. Rodriguez 13136bad8766SLuis R. Rodriguez chan->beacon_found = true; 13146bad8766SLuis R. Rodriguez 13155be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) 131637184244SLuis R. Rodriguez return; 131737184244SLuis R. Rodriguez 13186bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 13196bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 13206bad8766SLuis R. Rodriguez 132137184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { 1322e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 13236bad8766SLuis R. Rodriguez channel_changed = true; 1324e38f8a7aSLuis R. Rodriguez } 1325e38f8a7aSLuis R. Rodriguez 132637184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IBSS) { 1327e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 13286bad8766SLuis R. Rodriguez channel_changed = true; 1329e38f8a7aSLuis R. Rodriguez } 1330e38f8a7aSLuis R. Rodriguez 13316bad8766SLuis R. Rodriguez if (channel_changed) 13326bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1333e38f8a7aSLuis R. Rodriguez } 1334e38f8a7aSLuis R. Rodriguez 1335e38f8a7aSLuis R. Rodriguez /* 1336e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1337e38f8a7aSLuis R. Rodriguez * new channel 1338e38f8a7aSLuis R. Rodriguez */ 1339e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1340e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1341e38f8a7aSLuis R. Rodriguez { 1342e38f8a7aSLuis R. Rodriguez unsigned int i; 1343e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1344e38f8a7aSLuis R. Rodriguez 1345e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1346e38f8a7aSLuis R. Rodriguez 1347e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1348e38f8a7aSLuis R. Rodriguez return; 1349e38f8a7aSLuis R. Rodriguez 1350e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1351e38f8a7aSLuis R. Rodriguez 1352e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1353e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1354e38f8a7aSLuis R. Rodriguez } 1355e38f8a7aSLuis R. Rodriguez 1356e38f8a7aSLuis R. Rodriguez /* 1357e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1358e38f8a7aSLuis R. Rodriguez */ 1359e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1360e38f8a7aSLuis R. Rodriguez { 1361e38f8a7aSLuis R. Rodriguez unsigned int i; 1362e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1363e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1364e38f8a7aSLuis R. Rodriguez 1365e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1366e38f8a7aSLuis R. Rodriguez 1367e38f8a7aSLuis R. Rodriguez if (list_empty(®_beacon_list)) 1368e38f8a7aSLuis R. Rodriguez return; 1369e38f8a7aSLuis R. Rodriguez 1370e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1371e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1372e38f8a7aSLuis R. Rodriguez continue; 1373e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1374e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1375e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1376e38f8a7aSLuis R. Rodriguez } 1377e38f8a7aSLuis R. Rodriguez } 1378e38f8a7aSLuis R. Rodriguez 1379e38f8a7aSLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 1380e38f8a7aSLuis R. Rodriguez { 1381e38f8a7aSLuis R. Rodriguez if (is_world_regdom(cfg80211_regdomain->alpha2) || 1382e38f8a7aSLuis R. Rodriguez (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) 1383e38f8a7aSLuis R. Rodriguez return true; 1384b1ed8dddSLuis R. Rodriguez if (last_request && 1385b1ed8dddSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 13865be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 1387e38f8a7aSLuis R. Rodriguez return true; 1388e38f8a7aSLuis R. Rodriguez return false; 1389e38f8a7aSLuis R. Rodriguez } 1390e38f8a7aSLuis R. Rodriguez 1391e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1392e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1393e38f8a7aSLuis R. Rodriguez { 1394b1ed8dddSLuis R. Rodriguez /* 1395b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 1396b1ed8dddSLuis R. Rodriguez * have been processed yet. 1397b1ed8dddSLuis R. Rodriguez */ 1398b1ed8dddSLuis R. Rodriguez if (!last_request) 1399b1ed8dddSLuis R. Rodriguez return; 1400e38f8a7aSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 1401e38f8a7aSLuis R. Rodriguez return; 1402e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1403e38f8a7aSLuis R. Rodriguez } 1404e38f8a7aSLuis R. Rodriguez 1405038659e7SLuis R. Rodriguez static bool is_ht40_not_allowed(struct ieee80211_channel *chan) 1406038659e7SLuis R. Rodriguez { 1407038659e7SLuis R. Rodriguez if (!chan) 1408038659e7SLuis R. Rodriguez return true; 1409038659e7SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_DISABLED) 1410038659e7SLuis R. Rodriguez return true; 1411038659e7SLuis R. Rodriguez /* This would happen when regulatory rules disallow HT40 completely */ 1412038659e7SLuis R. Rodriguez if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) 1413038659e7SLuis R. Rodriguez return true; 1414038659e7SLuis R. Rodriguez return false; 1415038659e7SLuis R. Rodriguez } 1416038659e7SLuis R. Rodriguez 1417038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 1418038659e7SLuis R. Rodriguez enum ieee80211_band band, 1419038659e7SLuis R. Rodriguez unsigned int chan_idx) 1420038659e7SLuis R. Rodriguez { 1421038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1422038659e7SLuis R. Rodriguez struct ieee80211_channel *channel; 1423038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 1424038659e7SLuis R. Rodriguez unsigned int i; 1425038659e7SLuis R. Rodriguez 1426038659e7SLuis R. Rodriguez assert_cfg80211_lock(); 1427038659e7SLuis R. Rodriguez 1428038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1429038659e7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 1430038659e7SLuis R. Rodriguez channel = &sband->channels[chan_idx]; 1431038659e7SLuis R. Rodriguez 1432038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel)) { 1433038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 1434038659e7SLuis R. Rodriguez return; 1435038659e7SLuis R. Rodriguez } 1436038659e7SLuis R. Rodriguez 1437038659e7SLuis R. Rodriguez /* 1438038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 1439038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 1440038659e7SLuis R. Rodriguez */ 1441038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 1442038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 1443038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 1444038659e7SLuis R. Rodriguez channel_before = c; 1445038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 1446038659e7SLuis R. Rodriguez channel_after = c; 1447038659e7SLuis R. Rodriguez } 1448038659e7SLuis R. Rodriguez 1449038659e7SLuis R. Rodriguez /* 1450038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 1451038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 1452038659e7SLuis R. Rodriguez * to include that as well. 1453038659e7SLuis R. Rodriguez */ 1454038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_before)) 1455689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 1456038659e7SLuis R. Rodriguez else 1457689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 1458038659e7SLuis R. Rodriguez 1459038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_after)) 1460689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 1461038659e7SLuis R. Rodriguez else 1462689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 1463038659e7SLuis R. Rodriguez } 1464038659e7SLuis R. Rodriguez 1465038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1466038659e7SLuis R. Rodriguez enum ieee80211_band band) 1467038659e7SLuis R. Rodriguez { 1468038659e7SLuis R. Rodriguez unsigned int i; 1469038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1470038659e7SLuis R. Rodriguez 1471038659e7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1472038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1473038659e7SLuis R. Rodriguez 1474038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1475038659e7SLuis R. Rodriguez reg_process_ht_flags_channel(wiphy, band, i); 1476038659e7SLuis R. Rodriguez } 1477038659e7SLuis R. Rodriguez 1478038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1479038659e7SLuis R. Rodriguez { 1480038659e7SLuis R. Rodriguez enum ieee80211_band band; 1481038659e7SLuis R. Rodriguez 1482038659e7SLuis R. Rodriguez if (!wiphy) 1483038659e7SLuis R. Rodriguez return; 1484038659e7SLuis R. Rodriguez 1485038659e7SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1486038659e7SLuis R. Rodriguez if (wiphy->bands[band]) 1487038659e7SLuis R. Rodriguez reg_process_ht_flags_band(wiphy, band); 1488038659e7SLuis R. Rodriguez } 1489038659e7SLuis R. Rodriguez 1490038659e7SLuis R. Rodriguez } 1491038659e7SLuis R. Rodriguez 14927db90f4aSLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, 14937db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 14948318d78aSJohannes Berg { 14958318d78aSJohannes Berg enum ieee80211_band band; 1496d46e5b1dSLuis R. Rodriguez 14977db90f4aSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) 1498e38f8a7aSLuis R. Rodriguez goto out; 1499b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 15008318d78aSJohannes Berg if (wiphy->bands[band]) 1501a92a3ce7SLuis R. Rodriguez handle_band(wiphy, band); 1502b2e1b302SLuis R. Rodriguez } 1503e38f8a7aSLuis R. Rodriguez out: 1504e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1505038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 1506b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1507716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 1508b2e1b302SLuis R. Rodriguez } 1509b2e1b302SLuis R. Rodriguez 15101fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 15111fa25e41SLuis R. Rodriguez enum ieee80211_band band, 15121fa25e41SLuis R. Rodriguez unsigned int chan_idx, 15131fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 15141fa25e41SLuis R. Rodriguez { 15151fa25e41SLuis R. Rodriguez int r; 1516038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 1517038659e7SLuis R. Rodriguez u32 bw_flags = 0; 15181fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 15191fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1520038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 15211fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 15221fa25e41SLuis R. Rodriguez struct ieee80211_channel *chan; 15231fa25e41SLuis R. Rodriguez 1524abc7381bSLuis R. Rodriguez assert_reg_lock(); 1525ac46d48eSLuis R. Rodriguez 15261fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 15271fa25e41SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 15281fa25e41SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 15291fa25e41SLuis R. Rodriguez 1530038659e7SLuis R. Rodriguez r = freq_reg_info_regd(wiphy, 1531038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 1532038659e7SLuis R. Rodriguez desired_bw_khz, 1533038659e7SLuis R. Rodriguez ®_rule, 1534038659e7SLuis R. Rodriguez regd); 15351fa25e41SLuis R. Rodriguez 15361fa25e41SLuis R. Rodriguez if (r) { 15371fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 15381fa25e41SLuis R. Rodriguez return; 15391fa25e41SLuis R. Rodriguez } 15401fa25e41SLuis R. Rodriguez 15411fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1542038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 15431fa25e41SLuis R. Rodriguez 1544038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1545038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1546038659e7SLuis R. Rodriguez 1547038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 15481fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 15491fa25e41SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 15501fa25e41SLuis R. Rodriguez } 15511fa25e41SLuis R. Rodriguez 15521fa25e41SLuis R. Rodriguez static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, 15531fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 15541fa25e41SLuis R. Rodriguez { 15551fa25e41SLuis R. Rodriguez unsigned int i; 15561fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 15571fa25e41SLuis R. Rodriguez 15581fa25e41SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 15591fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 15601fa25e41SLuis R. Rodriguez 15611fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 15621fa25e41SLuis R. Rodriguez handle_channel_custom(wiphy, band, i, regd); 15631fa25e41SLuis R. Rodriguez } 15641fa25e41SLuis R. Rodriguez 15651fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 15661fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 15671fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 15681fa25e41SLuis R. Rodriguez { 15691fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1570bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1571ac46d48eSLuis R. Rodriguez 1572abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 15731fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1574bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1575bbcf3f02SLuis R. Rodriguez continue; 15761fa25e41SLuis R. Rodriguez handle_band_custom(wiphy, band, regd); 1577bbcf3f02SLuis R. Rodriguez bands_set++; 15781fa25e41SLuis R. Rodriguez } 1579abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1580bbcf3f02SLuis R. Rodriguez 1581bbcf3f02SLuis R. Rodriguez /* 1582bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 1583bbcf3f02SLuis R. Rodriguez * on your device's supportd bands. 1584bbcf3f02SLuis R. Rodriguez */ 1585bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 15861fa25e41SLuis R. Rodriguez } 15871fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 15881fa25e41SLuis R. Rodriguez 1589fb1fc7adSLuis R. Rodriguez /* 1590fb1fc7adSLuis R. Rodriguez * Return value which can be used by ignore_request() to indicate 1591fb1fc7adSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains 1592fb1fc7adSLuis R. Rodriguez */ 15939c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 15949c96477dSLuis R. Rodriguez 159584fa4f43SJohannes Berg /* This has the logic which determines when a new request 159684fa4f43SJohannes Berg * should be ignored. */ 15972f92cd2eSLuis R. Rodriguez static int ignore_request(struct wiphy *wiphy, 15982f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 159984fa4f43SJohannes Berg { 1600806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1601761cf7ecSLuis R. Rodriguez 1602761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1603761cf7ecSLuis R. Rodriguez 160484fa4f43SJohannes Berg /* All initial requests are respected */ 160584fa4f43SJohannes Berg if (!last_request) 160684fa4f43SJohannes Berg return 0; 160784fa4f43SJohannes Berg 16082f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 16097db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 1610ba25c141SLuis R. Rodriguez return -EINVAL; 16117db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1612806a9e39SLuis R. Rodriguez 1613806a9e39SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1614806a9e39SLuis R. Rodriguez 16152f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 161684fa4f43SJohannes Berg return -EINVAL; 16177db90f4aSLuis R. Rodriguez if (last_request->initiator == 16187db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1619806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 162084fa4f43SJohannes Berg /* 162184fa4f43SJohannes Berg * Two cards with two APs claiming different 16221fe90b03SThadeu Lima de Souza Cascardo * Country IE alpha2s. We could 162384fa4f43SJohannes Berg * intersect them, but that seems unlikely 162484fa4f43SJohannes Berg * to be correct. Reject second one for now. 162584fa4f43SJohannes Berg */ 16262f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 162784fa4f43SJohannes Berg return -EOPNOTSUPP; 162884fa4f43SJohannes Berg return -EALREADY; 162984fa4f43SJohannes Berg } 1630fb1fc7adSLuis R. Rodriguez /* 1631fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1632fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1633fb1fc7adSLuis R. Rodriguez */ 16342f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 163584fa4f43SJohannes Berg return 0; 163684fa4f43SJohannes Berg return -EALREADY; 163784fa4f43SJohannes Berg } 16383f2355cbSLuis R. Rodriguez return REG_INTERSECT; 16397db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 16407db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { 16412f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 1642e74b1e7fSLuis R. Rodriguez return 0; 1643e74b1e7fSLuis R. Rodriguez return -EALREADY; 1644e74b1e7fSLuis R. Rodriguez } 1645fff32c04SLuis R. Rodriguez 1646fff32c04SLuis R. Rodriguez /* 1647fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1648fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1649fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1650fff32c04SLuis R. Rodriguez */ 16517db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 16522f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1653fff32c04SLuis R. Rodriguez return -EALREADY; 1654fff32c04SLuis R. Rodriguez 16553e0c3ff3SLuis R. Rodriguez return REG_INTERSECT; 16567db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 16577db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 16589c96477dSLuis R. Rodriguez return REG_INTERSECT; 1659fb1fc7adSLuis R. Rodriguez /* 1660fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1661fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1662fb1fc7adSLuis R. Rodriguez */ 16637db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && 16643f2355cbSLuis R. Rodriguez last_request->intersect) 16653f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 1666fb1fc7adSLuis R. Rodriguez /* 1667fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1668fb1fc7adSLuis R. Rodriguez * requests have been processed 1669fb1fc7adSLuis R. Rodriguez */ 16707db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || 16717db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || 16727db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 167369b1572bSLuis R. Rodriguez if (regdom_changes(last_request->alpha2)) 16745eebade6SLuis R. Rodriguez return -EAGAIN; 16755eebade6SLuis R. Rodriguez } 16765eebade6SLuis R. Rodriguez 1677baeb66feSJohn W. Linville if (!regdom_changes(pending_request->alpha2)) 1678e74b1e7fSLuis R. Rodriguez return -EALREADY; 1679e74b1e7fSLuis R. Rodriguez 168084fa4f43SJohannes Berg return 0; 168184fa4f43SJohannes Berg } 168284fa4f43SJohannes Berg 168384fa4f43SJohannes Berg return -EINVAL; 168484fa4f43SJohannes Berg } 168584fa4f43SJohannes Berg 1686d1c96a9aSLuis R. Rodriguez /** 1687d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1688d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1689d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 169028da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1691d1c96a9aSLuis R. Rodriguez * 1692d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 169328da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1694d1c96a9aSLuis R. Rodriguez * 1695d1c96a9aSLuis R. Rodriguez * Returns zero if all went fine, %-EALREADY if a regulatory domain had 1696d1c96a9aSLuis R. Rodriguez * already been set or other standard error codes. 1697d1c96a9aSLuis R. Rodriguez * 1698abc7381bSLuis R. Rodriguez * Caller must hold &cfg80211_mutex and ®_mutex 1699d1c96a9aSLuis R. Rodriguez */ 170028da32d7SLuis R. Rodriguez static int __regulatory_hint(struct wiphy *wiphy, 170128da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1702b2e1b302SLuis R. Rodriguez { 17039c96477dSLuis R. Rodriguez bool intersect = false; 1704b2e1b302SLuis R. Rodriguez int r = 0; 1705b2e1b302SLuis R. Rodriguez 1706761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1707761cf7ecSLuis R. Rodriguez 17082f92cd2eSLuis R. Rodriguez r = ignore_request(wiphy, pending_request); 17099c96477dSLuis R. Rodriguez 17103e0c3ff3SLuis R. Rodriguez if (r == REG_INTERSECT) { 17117db90f4aSLuis R. Rodriguez if (pending_request->initiator == 17127db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 17133e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1714d951c1ddSLuis R. Rodriguez if (r) { 1715d951c1ddSLuis R. Rodriguez kfree(pending_request); 1716b2e1b302SLuis R. Rodriguez return r; 17173e0c3ff3SLuis R. Rodriguez } 1718d951c1ddSLuis R. Rodriguez } 17193e0c3ff3SLuis R. Rodriguez intersect = true; 17203e0c3ff3SLuis R. Rodriguez } else if (r) { 1721fb1fc7adSLuis R. Rodriguez /* 1722fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 17233e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1724fb1fc7adSLuis R. Rodriguez * wiphy 1725fb1fc7adSLuis R. Rodriguez */ 172628da32d7SLuis R. Rodriguez if (r == -EALREADY && 17277db90f4aSLuis R. Rodriguez pending_request->initiator == 17287db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 17293e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1730d951c1ddSLuis R. Rodriguez if (r) { 1731d951c1ddSLuis R. Rodriguez kfree(pending_request); 17323e0c3ff3SLuis R. Rodriguez return r; 1733d951c1ddSLuis R. Rodriguez } 17343e0c3ff3SLuis R. Rodriguez r = -EALREADY; 17353e0c3ff3SLuis R. Rodriguez goto new_request; 17363e0c3ff3SLuis R. Rodriguez } 1737d951c1ddSLuis R. Rodriguez kfree(pending_request); 17383e0c3ff3SLuis R. Rodriguez return r; 17393e0c3ff3SLuis R. Rodriguez } 1740b2e1b302SLuis R. Rodriguez 17413e0c3ff3SLuis R. Rodriguez new_request: 1742f6037d09SJohannes Berg kfree(last_request); 1743d951c1ddSLuis R. Rodriguez 1744d951c1ddSLuis R. Rodriguez last_request = pending_request; 1745d951c1ddSLuis R. Rodriguez last_request->intersect = intersect; 1746d951c1ddSLuis R. Rodriguez 1747d951c1ddSLuis R. Rodriguez pending_request = NULL; 17483e0c3ff3SLuis R. Rodriguez 17493e0c3ff3SLuis R. Rodriguez /* When r == REG_INTERSECT we do need to call CRDA */ 175073d54c9eSLuis R. Rodriguez if (r < 0) { 175173d54c9eSLuis R. Rodriguez /* 175273d54c9eSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 175373d54c9eSLuis R. Rodriguez * have applied the requested regulatory domain before we just 175473d54c9eSLuis R. Rodriguez * inform userspace we have processed the request 175573d54c9eSLuis R. Rodriguez */ 175673d54c9eSLuis R. Rodriguez if (r == -EALREADY) 175773d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 17583e0c3ff3SLuis R. Rodriguez return r; 175973d54c9eSLuis R. Rodriguez } 17603e0c3ff3SLuis R. Rodriguez 1761d951c1ddSLuis R. Rodriguez return call_crda(last_request->alpha2); 1762b2e1b302SLuis R. Rodriguez } 1763b2e1b302SLuis R. Rodriguez 176430a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 1765d951c1ddSLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 1766fe33eb39SLuis R. Rodriguez { 1767fe33eb39SLuis R. Rodriguez int r = 0; 1768fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1769fe33eb39SLuis R. Rodriguez 1770fe33eb39SLuis R. Rodriguez BUG_ON(!reg_request->alpha2); 1771fe33eb39SLuis R. Rodriguez 1772fe33eb39SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1773abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 1774fe33eb39SLuis R. Rodriguez 1775fe33eb39SLuis R. Rodriguez if (wiphy_idx_valid(reg_request->wiphy_idx)) 1776fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1777fe33eb39SLuis R. Rodriguez 17787db90f4aSLuis R. Rodriguez if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1779fe33eb39SLuis R. Rodriguez !wiphy) { 1780d951c1ddSLuis R. Rodriguez kfree(reg_request); 1781fe33eb39SLuis R. Rodriguez goto out; 1782fe33eb39SLuis R. Rodriguez } 1783fe33eb39SLuis R. Rodriguez 178428da32d7SLuis R. Rodriguez r = __regulatory_hint(wiphy, reg_request); 1785fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 17865be83de5SJohannes Berg if (r == -EALREADY && wiphy && 17875be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) 1788fe33eb39SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 1789fe33eb39SLuis R. Rodriguez out: 1790abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1791fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1792fe33eb39SLuis R. Rodriguez } 1793fe33eb39SLuis R. Rodriguez 17947db90f4aSLuis R. Rodriguez /* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */ 1795fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1796fe33eb39SLuis R. Rodriguez { 1797fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request; 1798fe33eb39SLuis R. Rodriguez 1799fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1800fe33eb39SLuis R. Rodriguez while (!list_empty(®_requests_list)) { 1801fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1802fe33eb39SLuis R. Rodriguez struct regulatory_request, 1803fe33eb39SLuis R. Rodriguez list); 1804fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1805fe33eb39SLuis R. Rodriguez 1806d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1807d951c1ddSLuis R. Rodriguez reg_process_hint(reg_request); 1808fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1809fe33eb39SLuis R. Rodriguez } 1810fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1811fe33eb39SLuis R. Rodriguez } 1812fe33eb39SLuis R. Rodriguez 1813e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1814e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1815e38f8a7aSLuis R. Rodriguez { 181679c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1817e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1818e38f8a7aSLuis R. Rodriguez 1819abc7381bSLuis R. Rodriguez /* 1820abc7381bSLuis R. Rodriguez * No need to hold the reg_mutex here as we just touch wiphys 1821abc7381bSLuis R. Rodriguez * and do not read or access regulatory variables. 1822abc7381bSLuis R. Rodriguez */ 1823e38f8a7aSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1824e38f8a7aSLuis R. Rodriguez 1825e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1826e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1827e38f8a7aSLuis R. Rodriguez 1828e38f8a7aSLuis R. Rodriguez if (list_empty(®_pending_beacons)) { 1829e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1830e38f8a7aSLuis R. Rodriguez goto out; 1831e38f8a7aSLuis R. Rodriguez } 1832e38f8a7aSLuis R. Rodriguez 1833e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1834e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1835e38f8a7aSLuis R. Rodriguez 1836e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1837e38f8a7aSLuis R. Rodriguez 1838e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 183979c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 184079c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 1841e38f8a7aSLuis R. Rodriguez 1842e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1843e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1844e38f8a7aSLuis R. Rodriguez } 1845e38f8a7aSLuis R. Rodriguez 1846e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1847e38f8a7aSLuis R. Rodriguez out: 1848e38f8a7aSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1849e38f8a7aSLuis R. Rodriguez } 1850e38f8a7aSLuis R. Rodriguez 1851fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1852fe33eb39SLuis R. Rodriguez { 1853fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1854e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 1855fe33eb39SLuis R. Rodriguez } 1856fe33eb39SLuis R. Rodriguez 1857fe33eb39SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 1858fe33eb39SLuis R. Rodriguez 1859fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1860fe33eb39SLuis R. Rodriguez { 1861fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1862fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1863fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1864fe33eb39SLuis R. Rodriguez 1865fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1866fe33eb39SLuis R. Rodriguez } 1867fe33eb39SLuis R. Rodriguez 1868fe33eb39SLuis R. Rodriguez /* Core regulatory hint -- happens once during cfg80211_init() */ 1869ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1870ba25c141SLuis R. Rodriguez { 1871ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1872ba25c141SLuis R. Rodriguez 1873ba25c141SLuis R. Rodriguez BUG_ON(last_request); 1874ba25c141SLuis R. Rodriguez 1875ba25c141SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1876ba25c141SLuis R. Rodriguez GFP_KERNEL); 1877ba25c141SLuis R. Rodriguez if (!request) 1878ba25c141SLuis R. Rodriguez return -ENOMEM; 1879ba25c141SLuis R. Rodriguez 1880ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1881ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 18827db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 1883ba25c141SLuis R. Rodriguez 1884fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1885ba25c141SLuis R. Rodriguez 18865078b2e3SLuis R. Rodriguez /* 18875078b2e3SLuis R. Rodriguez * This ensures last_request is populated once modules 18885078b2e3SLuis R. Rodriguez * come swinging in and calling regulatory hints and 18895078b2e3SLuis R. Rodriguez * wiphy_apply_custom_regulatory(). 18905078b2e3SLuis R. Rodriguez */ 18915078b2e3SLuis R. Rodriguez flush_scheduled_work(); 18925078b2e3SLuis R. Rodriguez 1893fe33eb39SLuis R. Rodriguez return 0; 1894ba25c141SLuis R. Rodriguez } 1895ba25c141SLuis R. Rodriguez 1896fe33eb39SLuis R. Rodriguez /* User hints */ 1897fe33eb39SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2) 1898b2e1b302SLuis R. Rodriguez { 1899fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1900fe33eb39SLuis R. Rodriguez 1901be3d4810SJohannes Berg BUG_ON(!alpha2); 1902b2e1b302SLuis R. Rodriguez 1903fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1904fe33eb39SLuis R. Rodriguez if (!request) 1905fe33eb39SLuis R. Rodriguez return -ENOMEM; 1906fe33eb39SLuis R. Rodriguez 1907fe33eb39SLuis R. Rodriguez request->wiphy_idx = WIPHY_IDX_STALE; 1908fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1909fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1910e12822e1SLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER; 1911fe33eb39SLuis R. Rodriguez 1912fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1913fe33eb39SLuis R. Rodriguez 1914fe33eb39SLuis R. Rodriguez return 0; 1915fe33eb39SLuis R. Rodriguez } 1916fe33eb39SLuis R. Rodriguez 1917fe33eb39SLuis R. Rodriguez /* Driver hints */ 1918fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1919fe33eb39SLuis R. Rodriguez { 1920fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1921fe33eb39SLuis R. Rodriguez 1922fe33eb39SLuis R. Rodriguez BUG_ON(!alpha2); 1923fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy); 1924fe33eb39SLuis R. Rodriguez 1925fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1926fe33eb39SLuis R. Rodriguez if (!request) 1927fe33eb39SLuis R. Rodriguez return -ENOMEM; 1928fe33eb39SLuis R. Rodriguez 1929fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1930fe33eb39SLuis R. Rodriguez 1931fe33eb39SLuis R. Rodriguez /* Must have registered wiphy first */ 1932fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); 1933fe33eb39SLuis R. Rodriguez 1934fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1935fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 19367db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 1937fe33eb39SLuis R. Rodriguez 1938fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1939fe33eb39SLuis R. Rodriguez 1940fe33eb39SLuis R. Rodriguez return 0; 1941b2e1b302SLuis R. Rodriguez } 1942b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1943b2e1b302SLuis R. Rodriguez 1944abc7381bSLuis R. Rodriguez /* Caller must hold reg_mutex */ 19453f2355cbSLuis R. Rodriguez static bool reg_same_country_ie_hint(struct wiphy *wiphy, 19463f2355cbSLuis R. Rodriguez u32 country_ie_checksum) 19473f2355cbSLuis R. Rodriguez { 1948806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1949806a9e39SLuis R. Rodriguez 1950abc7381bSLuis R. Rodriguez assert_reg_lock(); 1951761cf7ecSLuis R. Rodriguez 1952cc0b6fe8SLuis R. Rodriguez if (unlikely(last_request->initiator != 1953cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE)) 1954cc0b6fe8SLuis R. Rodriguez return false; 1955cc0b6fe8SLuis R. Rodriguez 1956806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1957806a9e39SLuis R. Rodriguez 1958806a9e39SLuis R. Rodriguez if (!request_wiphy) 19593f2355cbSLuis R. Rodriguez return false; 1960806a9e39SLuis R. Rodriguez 1961806a9e39SLuis R. Rodriguez if (likely(request_wiphy != wiphy)) 19623f2355cbSLuis R. Rodriguez return !country_ie_integrity_changes(country_ie_checksum); 1963fb1fc7adSLuis R. Rodriguez /* 1964fb1fc7adSLuis R. Rodriguez * We should not have let these through at this point, they 19653f2355cbSLuis R. Rodriguez * should have been picked up earlier by the first alpha2 check 1966fb1fc7adSLuis R. Rodriguez * on the device 1967fb1fc7adSLuis R. Rodriguez */ 19683f2355cbSLuis R. Rodriguez if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) 19693f2355cbSLuis R. Rodriguez return true; 19703f2355cbSLuis R. Rodriguez return false; 19713f2355cbSLuis R. Rodriguez } 19723f2355cbSLuis R. Rodriguez 19734b44c8bcSLuis R. Rodriguez /* 19744b44c8bcSLuis R. Rodriguez * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and 19754b44c8bcSLuis R. Rodriguez * therefore cannot iterate over the rdev list here. 19764b44c8bcSLuis R. Rodriguez */ 19773f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 19783f2355cbSLuis R. Rodriguez u8 *country_ie, 19793f2355cbSLuis R. Rodriguez u8 country_ie_len) 19803f2355cbSLuis R. Rodriguez { 19813f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 19823f2355cbSLuis R. Rodriguez char alpha2[2]; 19833f2355cbSLuis R. Rodriguez u32 checksum = 0; 19843f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 1985fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 19863f2355cbSLuis R. Rodriguez 1987abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 19883f2355cbSLuis R. Rodriguez 19899828b017SLuis R. Rodriguez if (unlikely(!last_request)) 19909828b017SLuis R. Rodriguez goto out; 1991d335fe63SLuis R. Rodriguez 19923f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 19933f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 19943f2355cbSLuis R. Rodriguez goto out; 19953f2355cbSLuis R. Rodriguez 19963f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 19973f2355cbSLuis R. Rodriguez goto out; 19983f2355cbSLuis R. Rodriguez 1999fb1fc7adSLuis R. Rodriguez /* 2000fb1fc7adSLuis R. Rodriguez * Pending country IE processing, this can happen after we 20013f2355cbSLuis R. Rodriguez * call CRDA and wait for a response if a beacon was received before 2002fb1fc7adSLuis R. Rodriguez * we were able to process the last regulatory_hint_11d() call 2003fb1fc7adSLuis R. Rodriguez */ 20043f2355cbSLuis R. Rodriguez if (country_ie_regdomain) 20053f2355cbSLuis R. Rodriguez goto out; 20063f2355cbSLuis R. Rodriguez 20073f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 20083f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 20093f2355cbSLuis R. Rodriguez 20103f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 20113f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 20123f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 20133f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 20143f2355cbSLuis R. Rodriguez 2015fb1fc7adSLuis R. Rodriguez /* 20168b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 20174b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 20184b44c8bcSLuis R. Rodriguez * cfg80211_mutex. 2019fb1fc7adSLuis R. Rodriguez */ 2020cc0b6fe8SLuis R. Rodriguez if (likely(last_request->initiator == 2021cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE && 20224b44c8bcSLuis R. Rodriguez wiphy_idx_valid(last_request->wiphy_idx))) 20233f2355cbSLuis R. Rodriguez goto out; 20243f2355cbSLuis R. Rodriguez 20253f2355cbSLuis R. Rodriguez rd = country_ie_2_rd(country_ie, country_ie_len, &checksum); 2026b74d12e1SLuis R. Rodriguez if (!rd) { 2027b74d12e1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Ignoring bogus country IE\n"); 20283f2355cbSLuis R. Rodriguez goto out; 2029b74d12e1SLuis R. Rodriguez } 20303f2355cbSLuis R. Rodriguez 2031915278e0SLuis R. Rodriguez /* 2032915278e0SLuis R. Rodriguez * This will not happen right now but we leave it here for the 20333f2355cbSLuis R. Rodriguez * the future when we want to add suspend/resume support and having 20343f2355cbSLuis R. Rodriguez * the user move to another country after doing so, or having the user 2035915278e0SLuis R. Rodriguez * move to another AP. Right now we just trust the first AP. 2036915278e0SLuis R. Rodriguez * 2037915278e0SLuis R. Rodriguez * If we hit this before we add this support we want to be informed of 2038915278e0SLuis R. Rodriguez * it as it would indicate a mistake in the current design 2039915278e0SLuis R. Rodriguez */ 2040915278e0SLuis R. Rodriguez if (WARN_ON(reg_same_country_ie_hint(wiphy, checksum))) 20410441d6ffSLuis R. Rodriguez goto free_rd_out; 20423f2355cbSLuis R. Rodriguez 2043fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2044fe33eb39SLuis R. Rodriguez if (!request) 2045fe33eb39SLuis R. Rodriguez goto free_rd_out; 2046fe33eb39SLuis R. Rodriguez 2047fb1fc7adSLuis R. Rodriguez /* 2048fb1fc7adSLuis R. Rodriguez * We keep this around for when CRDA comes back with a response so 2049fb1fc7adSLuis R. Rodriguez * we can intersect with that 2050fb1fc7adSLuis R. Rodriguez */ 20513f2355cbSLuis R. Rodriguez country_ie_regdomain = rd; 20523f2355cbSLuis R. Rodriguez 2053fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 2054fe33eb39SLuis R. Rodriguez request->alpha2[0] = rd->alpha2[0]; 2055fe33eb39SLuis R. Rodriguez request->alpha2[1] = rd->alpha2[1]; 20567db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 2057fe33eb39SLuis R. Rodriguez request->country_ie_checksum = checksum; 2058fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 20593f2355cbSLuis R. Rodriguez 2060abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2061fe33eb39SLuis R. Rodriguez 2062fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2063fe33eb39SLuis R. Rodriguez 2064fe33eb39SLuis R. Rodriguez return; 20650441d6ffSLuis R. Rodriguez 20660441d6ffSLuis R. Rodriguez free_rd_out: 20670441d6ffSLuis R. Rodriguez kfree(rd); 20683f2355cbSLuis R. Rodriguez out: 2069abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 20703f2355cbSLuis R. Rodriguez } 2071b2e1b302SLuis R. Rodriguez 2072e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 2073e38f8a7aSLuis R. Rodriguez { 2074e38f8a7aSLuis R. Rodriguez if (freq == ieee80211_channel_to_frequency(12) || 2075e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(13) || 2076e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(14)) 2077e38f8a7aSLuis R. Rodriguez return true; 2078e38f8a7aSLuis R. Rodriguez return false; 2079e38f8a7aSLuis R. Rodriguez } 2080e38f8a7aSLuis R. Rodriguez 2081e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 2082e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 2083e38f8a7aSLuis R. Rodriguez gfp_t gfp) 2084e38f8a7aSLuis R. Rodriguez { 2085e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 2086e38f8a7aSLuis R. Rodriguez 2087e38f8a7aSLuis R. Rodriguez if (likely((beacon_chan->beacon_found || 2088e38f8a7aSLuis R. Rodriguez (beacon_chan->flags & IEEE80211_CHAN_RADAR) || 2089e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 2090e38f8a7aSLuis R. Rodriguez !freq_is_chan_12_13_14(beacon_chan->center_freq))))) 2091e38f8a7aSLuis R. Rodriguez return 0; 2092e38f8a7aSLuis R. Rodriguez 2093e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 2094e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 2095e38f8a7aSLuis R. Rodriguez return -ENOMEM; 2096e38f8a7aSLuis R. Rodriguez 20974113f751SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Found new beacon on " 2098e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", 2099e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 2100e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 2101e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 21024113f751SLuis R. Rodriguez 2103e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 2104e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 2105e38f8a7aSLuis R. Rodriguez 2106e38f8a7aSLuis R. Rodriguez 2107e38f8a7aSLuis R. Rodriguez /* 2108e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 2109e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 2110e38f8a7aSLuis R. Rodriguez */ 2111e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2112e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 2113e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2114e38f8a7aSLuis R. Rodriguez 2115e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 2116e38f8a7aSLuis R. Rodriguez 2117e38f8a7aSLuis R. Rodriguez return 0; 2118e38f8a7aSLuis R. Rodriguez } 2119e38f8a7aSLuis R. Rodriguez 2120a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 2121b2e1b302SLuis R. Rodriguez { 2122b2e1b302SLuis R. Rodriguez unsigned int i; 2123a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 2124a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 2125a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 2126b2e1b302SLuis R. Rodriguez 2127269ac5fdSKalle Valo printk(KERN_INFO " (start_freq - end_freq @ bandwidth), " 2128b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 2129b2e1b302SLuis R. Rodriguez 2130b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 2131b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 2132b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 2133b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 2134b2e1b302SLuis R. Rodriguez 2135fb1fc7adSLuis R. Rodriguez /* 2136fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 2137fb1fc7adSLuis R. Rodriguez * in certain regions 2138fb1fc7adSLuis R. Rodriguez */ 2139b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 2140269ac5fdSKalle Valo printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " 2141b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 2142b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2143b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 2144b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 2145b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 2146b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 2147b2e1b302SLuis R. Rodriguez else 2148269ac5fdSKalle Valo printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " 2149b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 2150b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2151b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 2152b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 2153b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 2154b2e1b302SLuis R. Rodriguez } 2155b2e1b302SLuis R. Rodriguez } 2156b2e1b302SLuis R. Rodriguez 2157a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 2158b2e1b302SLuis R. Rodriguez { 2159b2e1b302SLuis R. Rodriguez 21603f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 21613f2355cbSLuis R. Rodriguez 21627db90f4aSLuis R. Rodriguez if (last_request->initiator == 21637db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 216479c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 216579c97e97SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx( 2166806a9e39SLuis R. Rodriguez last_request->wiphy_idx); 216779c97e97SJohannes Berg if (rdev) { 21683f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 21693f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 217079c97e97SJohannes Berg rdev->country_ie_alpha2[0], 217179c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 21723f2355cbSLuis R. Rodriguez } else 21733f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 21743f2355cbSLuis R. Rodriguez "domain intersected: \n"); 21753f2355cbSLuis R. Rodriguez } else 21763f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 2177039498c6SLuis R. Rodriguez "domain intersected: \n"); 21783f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 2179b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 2180b2e1b302SLuis R. Rodriguez "domain updated:\n"); 2181b2e1b302SLuis R. Rodriguez else { 2182b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 2183b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 2184b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 2185b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 2186b2e1b302SLuis R. Rodriguez else 2187b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 2188b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 2189b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 2190b2e1b302SLuis R. Rodriguez } 2191b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2192b2e1b302SLuis R. Rodriguez } 2193b2e1b302SLuis R. Rodriguez 21942df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 2195b2e1b302SLuis R. Rodriguez { 2196b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 2197b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 2198b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2199b2e1b302SLuis R. Rodriguez } 2200b2e1b302SLuis R. Rodriguez 22013f2355cbSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 22023f2355cbSLuis R. Rodriguez static void reg_country_ie_process_debug( 22033f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 22043f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 22053f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 22063f2355cbSLuis R. Rodriguez { 22073f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Received country IE:\n"); 22083f2355cbSLuis R. Rodriguez print_regdomain_info(country_ie_regdomain); 22093f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); 22103f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 22113f2355cbSLuis R. Rodriguez if (intersected_rd) { 22123f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: We intersect both of these " 22133f2355cbSLuis R. Rodriguez "and get:\n"); 2214667ecd01SLuis R. Rodriguez print_regdomain_info(intersected_rd); 22153f2355cbSLuis R. Rodriguez return; 22163f2355cbSLuis R. Rodriguez } 22173f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); 22183f2355cbSLuis R. Rodriguez } 22193f2355cbSLuis R. Rodriguez #else 22203f2355cbSLuis R. Rodriguez static inline void reg_country_ie_process_debug( 22213f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 22223f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 22233f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 22243f2355cbSLuis R. Rodriguez { 22253f2355cbSLuis R. Rodriguez } 22263f2355cbSLuis R. Rodriguez #endif 22273f2355cbSLuis R. Rodriguez 2228d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 2229a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 2230b2e1b302SLuis R. Rodriguez { 22319c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 223279c97e97SJohannes Berg struct cfg80211_registered_device *rdev = NULL; 2233806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 2234b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 2235b2e1b302SLuis R. Rodriguez 2236b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 2237f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 2238b2e1b302SLuis R. Rodriguez return -EINVAL; 2239b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 2240b2e1b302SLuis R. Rodriguez return 0; 2241b2e1b302SLuis R. Rodriguez } 2242b2e1b302SLuis R. Rodriguez 2243b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 2244b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 2245b2e1b302SLuis R. Rodriguez return -EINVAL; 2246b2e1b302SLuis R. Rodriguez 2247f6037d09SJohannes Berg if (!last_request) 2248b2e1b302SLuis R. Rodriguez return -EINVAL; 2249b2e1b302SLuis R. Rodriguez 2250fb1fc7adSLuis R. Rodriguez /* 2251fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 22523f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 2253fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 2254fb1fc7adSLuis R. Rodriguez */ 22557db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2256fb1fc7adSLuis R. Rodriguez /* 2257fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 2258fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 2259fb1fc7adSLuis R. Rodriguez */ 2260baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 2261b2e1b302SLuis R. Rodriguez return -EINVAL; 22623f2355cbSLuis R. Rodriguez } 22633f2355cbSLuis R. Rodriguez 2264fb1fc7adSLuis R. Rodriguez /* 2265fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 2266b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 2267b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 2268fb1fc7adSLuis R. Rodriguez * internal EEPROM data 2269fb1fc7adSLuis R. Rodriguez */ 2270b2e1b302SLuis R. Rodriguez 2271f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 2272b2e1b302SLuis R. Rodriguez return -EINVAL; 2273b2e1b302SLuis R. Rodriguez 2274b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2275b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 2276b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 2277b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 2278b2e1b302SLuis R. Rodriguez return -EINVAL; 2279b2e1b302SLuis R. Rodriguez } 2280b2e1b302SLuis R. Rodriguez 2281806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2282806a9e39SLuis R. Rodriguez 2283b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 22843e0c3ff3SLuis R. Rodriguez int r; 22853e0c3ff3SLuis R. Rodriguez 22867db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { 22873e0c3ff3SLuis R. Rodriguez reset_regdomains(); 22883e0c3ff3SLuis R. Rodriguez cfg80211_regdomain = rd; 22893e0c3ff3SLuis R. Rodriguez return 0; 22903e0c3ff3SLuis R. Rodriguez } 22913e0c3ff3SLuis R. Rodriguez 2292fb1fc7adSLuis R. Rodriguez /* 2293fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 2294fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 2295fb1fc7adSLuis R. Rodriguez */ 22963e0c3ff3SLuis R. Rodriguez 2297558f6d32SLuis R. Rodriguez /* 2298558f6d32SLuis R. Rodriguez * Userspace could have sent two replies with only 2299558f6d32SLuis R. Rodriguez * one kernel request. 2300558f6d32SLuis R. Rodriguez */ 2301558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 2302558f6d32SLuis R. Rodriguez return -EALREADY; 23033e0c3ff3SLuis R. Rodriguez 2304806a9e39SLuis R. Rodriguez r = reg_copy_regd(&request_wiphy->regd, rd); 23053e0c3ff3SLuis R. Rodriguez if (r) 23063e0c3ff3SLuis R. Rodriguez return r; 23073e0c3ff3SLuis R. Rodriguez 2308b8295acdSLuis R. Rodriguez reset_regdomains(); 2309b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 2310b8295acdSLuis R. Rodriguez return 0; 2311b8295acdSLuis R. Rodriguez } 2312b8295acdSLuis R. Rodriguez 2313b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 2314b8295acdSLuis R. Rodriguez 23157db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2316b8295acdSLuis R. Rodriguez 23179c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 23189c96477dSLuis R. Rodriguez if (!intersected_rd) 23199c96477dSLuis R. Rodriguez return -EINVAL; 2320b8295acdSLuis R. Rodriguez 2321fb1fc7adSLuis R. Rodriguez /* 2322fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 23233e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2324fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2325fb1fc7adSLuis R. Rodriguez */ 23267db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) 2327806a9e39SLuis R. Rodriguez request_wiphy->regd = rd; 23283e0c3ff3SLuis R. Rodriguez else 23299c96477dSLuis R. Rodriguez kfree(rd); 23303e0c3ff3SLuis R. Rodriguez 2331b8295acdSLuis R. Rodriguez rd = NULL; 2332b8295acdSLuis R. Rodriguez 2333b8295acdSLuis R. Rodriguez reset_regdomains(); 2334b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2335b8295acdSLuis R. Rodriguez 2336b8295acdSLuis R. Rodriguez return 0; 23379c96477dSLuis R. Rodriguez } 23389c96477dSLuis R. Rodriguez 23393f2355cbSLuis R. Rodriguez /* 23403f2355cbSLuis R. Rodriguez * Country IE requests are handled a bit differently, we intersect 23413f2355cbSLuis R. Rodriguez * the country IE rd with what CRDA believes that country should have 23423f2355cbSLuis R. Rodriguez */ 23433f2355cbSLuis R. Rodriguez 2344729e9c76SLuis R. Rodriguez /* 2345729e9c76SLuis R. Rodriguez * Userspace could have sent two replies with only 2346729e9c76SLuis R. Rodriguez * one kernel request. By the second reply we would have 2347729e9c76SLuis R. Rodriguez * already processed and consumed the country_ie_regdomain. 2348729e9c76SLuis R. Rodriguez */ 2349729e9c76SLuis R. Rodriguez if (!country_ie_regdomain) 2350729e9c76SLuis R. Rodriguez return -EALREADY; 235186f04680SLuis R. Rodriguez BUG_ON(rd == country_ie_regdomain); 23523f2355cbSLuis R. Rodriguez 2353fb1fc7adSLuis R. Rodriguez /* 2354fb1fc7adSLuis R. Rodriguez * Intersect what CRDA returned and our what we 2355fb1fc7adSLuis R. Rodriguez * had built from the Country IE received 2356fb1fc7adSLuis R. Rodriguez */ 23573f2355cbSLuis R. Rodriguez 23583f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, country_ie_regdomain); 23593f2355cbSLuis R. Rodriguez 236086f04680SLuis R. Rodriguez reg_country_ie_process_debug(rd, 236186f04680SLuis R. Rodriguez country_ie_regdomain, 23623f2355cbSLuis R. Rodriguez intersected_rd); 23633f2355cbSLuis R. Rodriguez 23643f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 23653f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 23663f2355cbSLuis R. Rodriguez 23673f2355cbSLuis R. Rodriguez if (!intersected_rd) 23683f2355cbSLuis R. Rodriguez return -EINVAL; 23693f2355cbSLuis R. Rodriguez 237079c97e97SJohannes Berg rdev = wiphy_to_dev(request_wiphy); 23713f2355cbSLuis R. Rodriguez 237279c97e97SJohannes Berg rdev->country_ie_alpha2[0] = rd->alpha2[0]; 237379c97e97SJohannes Berg rdev->country_ie_alpha2[1] = rd->alpha2[1]; 237479c97e97SJohannes Berg rdev->env = last_request->country_ie_env; 23753f2355cbSLuis R. Rodriguez 23763f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 23773f2355cbSLuis R. Rodriguez 23783f2355cbSLuis R. Rodriguez kfree(rd); 23793f2355cbSLuis R. Rodriguez rd = NULL; 23803f2355cbSLuis R. Rodriguez 2381b8295acdSLuis R. Rodriguez reset_regdomains(); 23823f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2383b2e1b302SLuis R. Rodriguez 2384b2e1b302SLuis R. Rodriguez return 0; 2385b2e1b302SLuis R. Rodriguez } 2386b2e1b302SLuis R. Rodriguez 2387b2e1b302SLuis R. Rodriguez 2388fb1fc7adSLuis R. Rodriguez /* 2389fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2390b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2391fb1fc7adSLuis R. Rodriguez * kmalloc'd the rd structure. Caller must hold cfg80211_mutex 2392fb1fc7adSLuis R. Rodriguez */ 2393a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2394b2e1b302SLuis R. Rodriguez { 2395b2e1b302SLuis R. Rodriguez int r; 2396b2e1b302SLuis R. Rodriguez 2397761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2398761cf7ecSLuis R. Rodriguez 2399abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2400abc7381bSLuis R. Rodriguez 2401b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 2402b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 2403d2372b31SJohannes Berg if (r) { 2404d2372b31SJohannes Berg kfree(rd); 2405abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2406b2e1b302SLuis R. Rodriguez return r; 2407d2372b31SJohannes Berg } 2408b2e1b302SLuis R. Rodriguez 2409b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 2410a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 2411b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 2412b2e1b302SLuis R. Rodriguez 2413b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2414f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 2415b2e1b302SLuis R. Rodriguez 2416a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 2417b2e1b302SLuis R. Rodriguez 241873d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 241973d54c9eSLuis R. Rodriguez 2420abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2421abc7381bSLuis R. Rodriguez 2422b2e1b302SLuis R. Rodriguez return r; 2423b2e1b302SLuis R. Rodriguez } 2424b2e1b302SLuis R. Rodriguez 2425a1794390SLuis R. Rodriguez /* Caller must hold cfg80211_mutex */ 24263f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 24273f2355cbSLuis R. Rodriguez { 24280ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 2429806a9e39SLuis R. Rodriguez 2430761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2431761cf7ecSLuis R. Rodriguez 2432abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2433abc7381bSLuis R. Rodriguez 24340ef9ccddSChris Wright kfree(wiphy->regd); 24350ef9ccddSChris Wright 24360ad8acafSLuis R. Rodriguez if (last_request) 2437806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2438806a9e39SLuis R. Rodriguez 24390ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 2440abc7381bSLuis R. Rodriguez goto out; 24410ef9ccddSChris Wright 2442806a9e39SLuis R. Rodriguez last_request->wiphy_idx = WIPHY_IDX_STALE; 24433f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 2444abc7381bSLuis R. Rodriguez out: 2445abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 24463f2355cbSLuis R. Rodriguez } 24473f2355cbSLuis R. Rodriguez 2448b2e1b302SLuis R. Rodriguez int regulatory_init(void) 2449b2e1b302SLuis R. Rodriguez { 2450bcf4f99bSLuis R. Rodriguez int err = 0; 2451734366deSJohannes Berg 2452b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 2453b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 2454b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 2455734366deSJohannes Berg 2456fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 2457e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2458fe33eb39SLuis R. Rodriguez 2459a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 2460734366deSJohannes Berg 2461ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 2462ae9e4b0dSLuis R. Rodriguez err = regulatory_hint_core(cfg80211_regdomain->alpha2); 2463bcf4f99bSLuis R. Rodriguez if (err) { 2464bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2465bcf4f99bSLuis R. Rodriguez return err; 2466bcf4f99bSLuis R. Rodriguez /* 2467bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2468bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2469bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2470bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2471bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2472bcf4f99bSLuis R. Rodriguez */ 2473bcf4f99bSLuis R. Rodriguez printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " 2474bcf4f99bSLuis R. Rodriguez "to call CRDA during init"); 2475bcf4f99bSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 2476bcf4f99bSLuis R. Rodriguez /* We want to find out exactly why when debugging */ 2477bcf4f99bSLuis R. Rodriguez WARN_ON(err); 2478bcf4f99bSLuis R. Rodriguez #endif 2479bcf4f99bSLuis R. Rodriguez } 2480734366deSJohannes Berg 2481ae9e4b0dSLuis R. Rodriguez /* 2482ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 2483ae9e4b0dSLuis R. Rodriguez * as a user hint. 2484ae9e4b0dSLuis R. Rodriguez */ 2485ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 2486ae9e4b0dSLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom); 2487ae9e4b0dSLuis R. Rodriguez 2488b2e1b302SLuis R. Rodriguez return 0; 2489b2e1b302SLuis R. Rodriguez } 2490b2e1b302SLuis R. Rodriguez 2491b2e1b302SLuis R. Rodriguez void regulatory_exit(void) 2492b2e1b302SLuis R. Rodriguez { 2493fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2494e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2495fe33eb39SLuis R. Rodriguez 2496fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2497fe33eb39SLuis R. Rodriguez 2498a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 2499abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2500734366deSJohannes Berg 2501b2e1b302SLuis R. Rodriguez reset_regdomains(); 2502734366deSJohannes Berg 25033f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 25043f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 25053f2355cbSLuis R. Rodriguez 2506f6037d09SJohannes Berg kfree(last_request); 2507f6037d09SJohannes Berg 2508b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2509734366deSJohannes Berg 2510e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2511e38f8a7aSLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 2512e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2513e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2514e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2515e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2516e38f8a7aSLuis R. Rodriguez } 2517e38f8a7aSLuis R. Rodriguez } 2518e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2519e38f8a7aSLuis R. Rodriguez 2520e38f8a7aSLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 2521e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2522e38f8a7aSLuis R. Rodriguez ®_beacon_list, list) { 2523e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2524e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2525e38f8a7aSLuis R. Rodriguez } 2526e38f8a7aSLuis R. Rodriguez } 2527e38f8a7aSLuis R. Rodriguez 2528fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2529fe33eb39SLuis R. Rodriguez if (!list_empty(®_requests_list)) { 2530fe33eb39SLuis R. Rodriguez list_for_each_entry_safe(reg_request, tmp, 2531fe33eb39SLuis R. Rodriguez ®_requests_list, list) { 2532fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2533fe33eb39SLuis R. Rodriguez kfree(reg_request); 2534fe33eb39SLuis R. Rodriguez } 2535fe33eb39SLuis R. Rodriguez } 2536fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2537fe33eb39SLuis R. Rodriguez 2538abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2539a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 25408318d78aSJohannes Berg } 2541