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 /* 48884920e3eSLuis R. Rodriguez * This is a work around for sanity checking ieee80211_channel_to_frequency()'s 48984920e3eSLuis R. Rodriguez * work. ieee80211_channel_to_frequency() can for example currently provide a 49084920e3eSLuis R. Rodriguez * 2 GHz channel when in fact a 5 GHz channel was desired. An example would be 49184920e3eSLuis R. Rodriguez * an AP providing channel 8 on a country IE triplet when it sent this on the 49284920e3eSLuis R. Rodriguez * 5 GHz band, that channel is designed to be channel 8 on 5 GHz, not a 2 GHz 49384920e3eSLuis R. Rodriguez * channel. 49484920e3eSLuis R. Rodriguez * 49584920e3eSLuis R. Rodriguez * This can be removed once ieee80211_channel_to_frequency() takes in a band. 49684920e3eSLuis R. Rodriguez */ 49784920e3eSLuis R. Rodriguez static bool chan_in_band(int chan, enum ieee80211_band band) 49884920e3eSLuis R. Rodriguez { 49984920e3eSLuis R. Rodriguez int center_freq = ieee80211_channel_to_frequency(chan); 50084920e3eSLuis R. Rodriguez 50184920e3eSLuis R. Rodriguez switch (band) { 50284920e3eSLuis R. Rodriguez case IEEE80211_BAND_2GHZ: 50384920e3eSLuis R. Rodriguez if (center_freq <= 2484) 50484920e3eSLuis R. Rodriguez return true; 50584920e3eSLuis R. Rodriguez return false; 50684920e3eSLuis R. Rodriguez case IEEE80211_BAND_5GHZ: 50784920e3eSLuis R. Rodriguez if (center_freq >= 5005) 50884920e3eSLuis R. Rodriguez return true; 50984920e3eSLuis R. Rodriguez return false; 51084920e3eSLuis R. Rodriguez default: 51184920e3eSLuis R. Rodriguez return false; 51284920e3eSLuis R. Rodriguez } 51384920e3eSLuis R. Rodriguez } 51484920e3eSLuis R. Rodriguez 51584920e3eSLuis R. Rodriguez /* 516cc5d8a37SLuis R. Rodriguez * Some APs may send a country IE triplet for each channel they 517cc5d8a37SLuis R. Rodriguez * support and while this is completely overkill and silly we still 518cc5d8a37SLuis R. Rodriguez * need to support it. We avoid making a single rule for each channel 519cc5d8a37SLuis R. Rodriguez * though and to help us with this we use this helper to find the 520cc5d8a37SLuis R. Rodriguez * actual subband end channel. These type of country IE triplet 521cc5d8a37SLuis R. Rodriguez * scenerios are handled then, all yielding two regulaotry rules from 522cc5d8a37SLuis R. Rodriguez * parsing a country IE: 523cc5d8a37SLuis R. Rodriguez * 524cc5d8a37SLuis R. Rodriguez * [1] 525cc5d8a37SLuis R. Rodriguez * [2] 526cc5d8a37SLuis R. Rodriguez * [36] 527cc5d8a37SLuis R. Rodriguez * [40] 528cc5d8a37SLuis R. Rodriguez * 529cc5d8a37SLuis R. Rodriguez * [1] 530cc5d8a37SLuis R. Rodriguez * [2-4] 531cc5d8a37SLuis R. Rodriguez * [5-12] 532cc5d8a37SLuis R. Rodriguez * [36] 533cc5d8a37SLuis R. Rodriguez * [40-44] 534cc5d8a37SLuis R. Rodriguez * 535cc5d8a37SLuis R. Rodriguez * [1-4] 536cc5d8a37SLuis R. Rodriguez * [5-7] 537cc5d8a37SLuis R. Rodriguez * [36-44] 538cc5d8a37SLuis R. Rodriguez * [48-64] 539cc5d8a37SLuis R. Rodriguez * 540cc5d8a37SLuis R. Rodriguez * [36-36] 541cc5d8a37SLuis R. Rodriguez * [40-40] 542cc5d8a37SLuis R. Rodriguez * [44-44] 543cc5d8a37SLuis R. Rodriguez * [48-48] 544cc5d8a37SLuis R. Rodriguez * [52-52] 545cc5d8a37SLuis R. Rodriguez * [56-56] 546cc5d8a37SLuis R. Rodriguez * [60-60] 547cc5d8a37SLuis R. Rodriguez * [64-64] 548cc5d8a37SLuis R. Rodriguez * [100-100] 549cc5d8a37SLuis R. Rodriguez * [104-104] 550cc5d8a37SLuis R. Rodriguez * [108-108] 551cc5d8a37SLuis R. Rodriguez * [112-112] 552cc5d8a37SLuis R. Rodriguez * [116-116] 553cc5d8a37SLuis R. Rodriguez * [120-120] 554cc5d8a37SLuis R. Rodriguez * [124-124] 555cc5d8a37SLuis R. Rodriguez * [128-128] 556cc5d8a37SLuis R. Rodriguez * [132-132] 557cc5d8a37SLuis R. Rodriguez * [136-136] 558cc5d8a37SLuis R. Rodriguez * [140-140] 559cc5d8a37SLuis R. Rodriguez * 560cc5d8a37SLuis R. Rodriguez * Returns 0 if the IE has been found to be invalid in the middle 561cc5d8a37SLuis R. Rodriguez * somewhere. 562cc5d8a37SLuis R. Rodriguez */ 56384920e3eSLuis R. Rodriguez static int max_subband_chan(enum ieee80211_band band, 56484920e3eSLuis R. Rodriguez int orig_cur_chan, 565cc5d8a37SLuis R. Rodriguez int orig_end_channel, 566cc5d8a37SLuis R. Rodriguez s8 orig_max_power, 567cc5d8a37SLuis R. Rodriguez u8 **country_ie, 568cc5d8a37SLuis R. Rodriguez u8 *country_ie_len) 569cc5d8a37SLuis R. Rodriguez { 570cc5d8a37SLuis R. Rodriguez u8 *triplets_start = *country_ie; 571cc5d8a37SLuis R. Rodriguez u8 len_at_triplet = *country_ie_len; 572cc5d8a37SLuis R. Rodriguez int end_subband_chan = orig_end_channel; 573cc5d8a37SLuis R. Rodriguez 574cc5d8a37SLuis R. Rodriguez /* 575cc5d8a37SLuis R. Rodriguez * We'll deal with padding for the caller unless 576cc5d8a37SLuis R. Rodriguez * its not immediate and we don't process any channels 577cc5d8a37SLuis R. Rodriguez */ 578cc5d8a37SLuis R. Rodriguez if (*country_ie_len == 1) { 579cc5d8a37SLuis R. Rodriguez *country_ie += 1; 580cc5d8a37SLuis R. Rodriguez *country_ie_len -= 1; 581cc5d8a37SLuis R. Rodriguez return orig_end_channel; 582cc5d8a37SLuis R. Rodriguez } 583cc5d8a37SLuis R. Rodriguez 584cc5d8a37SLuis R. Rodriguez /* Move to the next triplet and then start search */ 585cc5d8a37SLuis R. Rodriguez *country_ie += 3; 586cc5d8a37SLuis R. Rodriguez *country_ie_len -= 3; 587cc5d8a37SLuis R. Rodriguez 58884920e3eSLuis R. Rodriguez if (!chan_in_band(orig_cur_chan, band)) 58984920e3eSLuis R. Rodriguez return 0; 590cc5d8a37SLuis R. Rodriguez 591cc5d8a37SLuis R. Rodriguez while (*country_ie_len >= 3) { 592cc5d8a37SLuis R. Rodriguez int end_channel = 0; 593cc5d8a37SLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 594cc5d8a37SLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) *country_ie; 595cc5d8a37SLuis R. Rodriguez int cur_channel = 0, next_expected_chan; 596cc5d8a37SLuis R. Rodriguez 597cc5d8a37SLuis R. Rodriguez /* means last triplet is completely unrelated to this one */ 598cc5d8a37SLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 599cc5d8a37SLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 600cc5d8a37SLuis R. Rodriguez *country_ie -= 3; 601cc5d8a37SLuis R. Rodriguez *country_ie_len += 3; 602cc5d8a37SLuis R. Rodriguez break; 603cc5d8a37SLuis R. Rodriguez } 604cc5d8a37SLuis R. Rodriguez 605cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel == 0) { 606cc5d8a37SLuis R. Rodriguez *country_ie += 1; 607cc5d8a37SLuis R. Rodriguez *country_ie_len -= 1; 608cc5d8a37SLuis R. Rodriguez if (*country_ie_len != 0) 609cc5d8a37SLuis R. Rodriguez return 0; 610cc5d8a37SLuis R. Rodriguez break; 611cc5d8a37SLuis R. Rodriguez } 612cc5d8a37SLuis R. Rodriguez 613a0f2e0fcSLuis R. Rodriguez if (triplet->chans.num_channels == 0) 614a0f2e0fcSLuis R. Rodriguez return 0; 615a0f2e0fcSLuis R. Rodriguez 616cc5d8a37SLuis R. Rodriguez /* Monitonically increasing channel order */ 617cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel <= end_subband_chan) 618cc5d8a37SLuis R. Rodriguez return 0; 619cc5d8a37SLuis R. Rodriguez 62084920e3eSLuis R. Rodriguez if (!chan_in_band(triplet->chans.first_channel, band)) 62184920e3eSLuis R. Rodriguez return 0; 62284920e3eSLuis R. Rodriguez 623cc5d8a37SLuis R. Rodriguez /* 2 GHz */ 624cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel <= 14) { 625cc5d8a37SLuis R. Rodriguez end_channel = triplet->chans.first_channel + 626cc5d8a37SLuis R. Rodriguez triplet->chans.num_channels - 1; 627cc5d8a37SLuis R. Rodriguez } 628cc5d8a37SLuis R. Rodriguez else { 629cc5d8a37SLuis R. Rodriguez end_channel = triplet->chans.first_channel + 630cc5d8a37SLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 631cc5d8a37SLuis R. Rodriguez } 632cc5d8a37SLuis R. Rodriguez 63384920e3eSLuis R. Rodriguez if (!chan_in_band(end_channel, band)) 63484920e3eSLuis R. Rodriguez return 0; 635cc5d8a37SLuis R. Rodriguez 636cc5d8a37SLuis R. Rodriguez if (orig_max_power != triplet->chans.max_power) { 637cc5d8a37SLuis R. Rodriguez *country_ie -= 3; 638cc5d8a37SLuis R. Rodriguez *country_ie_len += 3; 639cc5d8a37SLuis R. Rodriguez break; 640cc5d8a37SLuis R. Rodriguez } 641cc5d8a37SLuis R. Rodriguez 642cc5d8a37SLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 643cc5d8a37SLuis R. Rodriguez 644cc5d8a37SLuis R. Rodriguez /* The key is finding the right next expected channel */ 645cc5d8a37SLuis R. Rodriguez if (band == IEEE80211_BAND_2GHZ) 646cc5d8a37SLuis R. Rodriguez next_expected_chan = end_subband_chan + 1; 647cc5d8a37SLuis R. Rodriguez else 648cc5d8a37SLuis R. Rodriguez next_expected_chan = end_subband_chan + 4; 649cc5d8a37SLuis R. Rodriguez 650cc5d8a37SLuis R. Rodriguez if (cur_channel != next_expected_chan) { 651cc5d8a37SLuis R. Rodriguez *country_ie -= 3; 652cc5d8a37SLuis R. Rodriguez *country_ie_len += 3; 653cc5d8a37SLuis R. Rodriguez break; 654cc5d8a37SLuis R. Rodriguez } 655cc5d8a37SLuis R. Rodriguez 656cc5d8a37SLuis R. Rodriguez end_subband_chan = end_channel; 657cc5d8a37SLuis R. Rodriguez 658cc5d8a37SLuis R. Rodriguez /* Move to the next one */ 659cc5d8a37SLuis R. Rodriguez *country_ie += 3; 660cc5d8a37SLuis R. Rodriguez *country_ie_len -= 3; 661cc5d8a37SLuis R. Rodriguez 662cc5d8a37SLuis R. Rodriguez /* 663cc5d8a37SLuis R. Rodriguez * Padding needs to be dealt with if we processed 664cc5d8a37SLuis R. Rodriguez * some channels. 665cc5d8a37SLuis R. Rodriguez */ 666cc5d8a37SLuis R. Rodriguez if (*country_ie_len == 1) { 667cc5d8a37SLuis R. Rodriguez *country_ie += 1; 668cc5d8a37SLuis R. Rodriguez *country_ie_len -= 1; 669cc5d8a37SLuis R. Rodriguez break; 670cc5d8a37SLuis R. Rodriguez } 671cc5d8a37SLuis R. Rodriguez 672cc5d8a37SLuis R. Rodriguez /* If seen, the IE is invalid */ 673cc5d8a37SLuis R. Rodriguez if (*country_ie_len == 2) 674cc5d8a37SLuis R. Rodriguez return 0; 675cc5d8a37SLuis R. Rodriguez } 676cc5d8a37SLuis R. Rodriguez 677cc5d8a37SLuis R. Rodriguez if (end_subband_chan == orig_end_channel) { 678cc5d8a37SLuis R. Rodriguez *country_ie = triplets_start; 679cc5d8a37SLuis R. Rodriguez *country_ie_len = len_at_triplet; 680cc5d8a37SLuis R. Rodriguez return orig_end_channel; 681cc5d8a37SLuis R. Rodriguez } 682cc5d8a37SLuis R. Rodriguez 683cc5d8a37SLuis R. Rodriguez return end_subband_chan; 684cc5d8a37SLuis R. Rodriguez } 685cc5d8a37SLuis R. Rodriguez 686cc5d8a37SLuis R. Rodriguez /* 687fb1fc7adSLuis R. Rodriguez * Converts a country IE to a regulatory domain. A regulatory domain 6883f2355cbSLuis R. Rodriguez * structure has a lot of information which the IE doesn't yet have, 6893f2355cbSLuis R. Rodriguez * so for the other values we use upper max values as we will intersect 690fb1fc7adSLuis R. Rodriguez * with our userspace regulatory agent to get lower bounds. 691fb1fc7adSLuis R. Rodriguez */ 6923f2355cbSLuis R. Rodriguez static struct ieee80211_regdomain *country_ie_2_rd( 69384920e3eSLuis R. Rodriguez enum ieee80211_band band, 6943f2355cbSLuis R. Rodriguez u8 *country_ie, 6953f2355cbSLuis R. Rodriguez u8 country_ie_len, 6963f2355cbSLuis R. Rodriguez u32 *checksum) 6973f2355cbSLuis R. Rodriguez { 6983f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 6993f2355cbSLuis R. Rodriguez unsigned int i = 0; 7003f2355cbSLuis R. Rodriguez char alpha2[2]; 7013f2355cbSLuis R. Rodriguez u32 flags = 0; 7023f2355cbSLuis R. Rodriguez u32 num_rules = 0, size_of_regd = 0; 7033f2355cbSLuis R. Rodriguez u8 *triplets_start = NULL; 7043f2355cbSLuis R. Rodriguez u8 len_at_triplet = 0; 7053f2355cbSLuis R. Rodriguez /* the last channel we have registered in a subband (triplet) */ 7063f2355cbSLuis R. Rodriguez int last_sub_max_channel = 0; 7073f2355cbSLuis R. Rodriguez 7083f2355cbSLuis R. Rodriguez *checksum = 0xDEADBEEF; 7093f2355cbSLuis R. Rodriguez 7103f2355cbSLuis R. Rodriguez /* Country IE requirements */ 7113f2355cbSLuis R. Rodriguez BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || 7123f2355cbSLuis R. Rodriguez country_ie_len & 0x01); 7133f2355cbSLuis R. Rodriguez 7143f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 7153f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 7163f2355cbSLuis R. Rodriguez 7173f2355cbSLuis R. Rodriguez /* 7183f2355cbSLuis R. Rodriguez * Third octet can be: 7193f2355cbSLuis R. Rodriguez * 'I' - Indoor 7203f2355cbSLuis R. Rodriguez * 'O' - Outdoor 7213f2355cbSLuis R. Rodriguez * 7223f2355cbSLuis R. Rodriguez * anything else we assume is no restrictions 7233f2355cbSLuis R. Rodriguez */ 7243f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 7253f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_OUTDOOR; 7263f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 7273f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_INDOOR; 7283f2355cbSLuis R. Rodriguez 7293f2355cbSLuis R. Rodriguez country_ie += 3; 7303f2355cbSLuis R. Rodriguez country_ie_len -= 3; 7313f2355cbSLuis R. Rodriguez 7323f2355cbSLuis R. Rodriguez triplets_start = country_ie; 7333f2355cbSLuis R. Rodriguez len_at_triplet = country_ie_len; 7343f2355cbSLuis R. Rodriguez 7353f2355cbSLuis R. Rodriguez *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); 7363f2355cbSLuis R. Rodriguez 737fb1fc7adSLuis R. Rodriguez /* 738fb1fc7adSLuis R. Rodriguez * We need to build a reg rule for each triplet, but first we must 7393f2355cbSLuis R. Rodriguez * calculate the number of reg rules we will need. We will need one 740fb1fc7adSLuis R. Rodriguez * for each channel subband 741fb1fc7adSLuis R. Rodriguez */ 7423f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 743615aab4bSLuis R. Rodriguez int end_channel = 0; 7443f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 7453f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 7463f2355cbSLuis R. Rodriguez int cur_sub_max_channel = 0, cur_channel = 0; 7473f2355cbSLuis R. Rodriguez 7483f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 7493f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 7503f2355cbSLuis R. Rodriguez country_ie += 3; 7513f2355cbSLuis R. Rodriguez country_ie_len -= 3; 7523f2355cbSLuis R. Rodriguez continue; 7533f2355cbSLuis R. Rodriguez } 7543f2355cbSLuis R. Rodriguez 755cc5d8a37SLuis R. Rodriguez /* 756cc5d8a37SLuis R. Rodriguez * APs can add padding to make length divisible 757cc5d8a37SLuis R. Rodriguez * by two, required by the spec. 758cc5d8a37SLuis R. Rodriguez */ 759cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel == 0) { 760cc5d8a37SLuis R. Rodriguez country_ie++; 761cc5d8a37SLuis R. Rodriguez country_ie_len--; 762cc5d8a37SLuis R. Rodriguez /* This is expected to be at the very end only */ 763cc5d8a37SLuis R. Rodriguez if (country_ie_len != 0) 764cc5d8a37SLuis R. Rodriguez return NULL; 765cc5d8a37SLuis R. Rodriguez break; 766cc5d8a37SLuis R. Rodriguez } 767cc5d8a37SLuis R. Rodriguez 768a0f2e0fcSLuis R. Rodriguez if (triplet->chans.num_channels == 0) 769a0f2e0fcSLuis R. Rodriguez return NULL; 770a0f2e0fcSLuis R. Rodriguez 77184920e3eSLuis R. Rodriguez if (!chan_in_band(triplet->chans.first_channel, band)) 77284920e3eSLuis R. Rodriguez return NULL; 77384920e3eSLuis R. Rodriguez 774615aab4bSLuis R. Rodriguez /* 2 GHz */ 77584920e3eSLuis R. Rodriguez if (band == IEEE80211_BAND_2GHZ) 776615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 777e99c7cd5SLuis R. Rodriguez triplet->chans.num_channels - 1; 778615aab4bSLuis R. Rodriguez else 779615aab4bSLuis R. Rodriguez /* 780615aab4bSLuis R. Rodriguez * 5 GHz -- For example in country IEs if the first 781615aab4bSLuis R. Rodriguez * channel given is 36 and the number of channels is 4 782615aab4bSLuis R. Rodriguez * then the individual channel numbers defined for the 783615aab4bSLuis R. Rodriguez * 5 GHz PHY by these parameters are: 36, 40, 44, and 48 784615aab4bSLuis R. Rodriguez * and not 36, 37, 38, 39. 785615aab4bSLuis R. Rodriguez * 786615aab4bSLuis R. Rodriguez * See: http://tinyurl.com/11d-clarification 787615aab4bSLuis R. Rodriguez */ 788615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 789615aab4bSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 790615aab4bSLuis R. Rodriguez 7913f2355cbSLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 792cc5d8a37SLuis R. Rodriguez 793cc5d8a37SLuis R. Rodriguez /* 794cc5d8a37SLuis R. Rodriguez * Enhancement for APs that send a triplet for every channel 795cc5d8a37SLuis R. Rodriguez * or for whatever reason sends triplets with multiple channels 796cc5d8a37SLuis R. Rodriguez * separated when in fact they should be together. 797cc5d8a37SLuis R. Rodriguez */ 79884920e3eSLuis R. Rodriguez end_channel = max_subband_chan(band, 79984920e3eSLuis R. Rodriguez cur_channel, 800cc5d8a37SLuis R. Rodriguez end_channel, 801cc5d8a37SLuis R. Rodriguez triplet->chans.max_power, 802cc5d8a37SLuis R. Rodriguez &country_ie, 803cc5d8a37SLuis R. Rodriguez &country_ie_len); 804cc5d8a37SLuis R. Rodriguez if (!end_channel) 805cc5d8a37SLuis R. Rodriguez return NULL; 806cc5d8a37SLuis R. Rodriguez 80784920e3eSLuis R. Rodriguez if (!chan_in_band(end_channel, band)) 80884920e3eSLuis R. Rodriguez return NULL; 80984920e3eSLuis R. Rodriguez 810615aab4bSLuis R. Rodriguez cur_sub_max_channel = end_channel; 8113f2355cbSLuis R. Rodriguez 8123f2355cbSLuis R. Rodriguez /* Basic sanity check */ 8133f2355cbSLuis R. Rodriguez if (cur_sub_max_channel < cur_channel) 8143f2355cbSLuis R. Rodriguez return NULL; 8153f2355cbSLuis R. Rodriguez 816fb1fc7adSLuis R. Rodriguez /* 817fb1fc7adSLuis R. Rodriguez * Do not allow overlapping channels. Also channels 8183f2355cbSLuis R. Rodriguez * passed in each subband must be monotonically 819fb1fc7adSLuis R. Rodriguez * increasing 820fb1fc7adSLuis R. Rodriguez */ 8213f2355cbSLuis R. Rodriguez if (last_sub_max_channel) { 8223f2355cbSLuis R. Rodriguez if (cur_channel <= last_sub_max_channel) 8233f2355cbSLuis R. Rodriguez return NULL; 8243f2355cbSLuis R. Rodriguez if (cur_sub_max_channel <= last_sub_max_channel) 8253f2355cbSLuis R. Rodriguez return NULL; 8263f2355cbSLuis R. Rodriguez } 8273f2355cbSLuis R. Rodriguez 828fb1fc7adSLuis R. Rodriguez /* 829fb1fc7adSLuis R. Rodriguez * When dot11RegulatoryClassesRequired is supported 8303f2355cbSLuis R. Rodriguez * we can throw ext triplets as part of this soup, 8313f2355cbSLuis R. Rodriguez * for now we don't care when those change as we 832fb1fc7adSLuis R. Rodriguez * don't support them 833fb1fc7adSLuis R. Rodriguez */ 8343f2355cbSLuis R. Rodriguez *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | 8353f2355cbSLuis R. Rodriguez ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | 8363f2355cbSLuis R. Rodriguez ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); 8373f2355cbSLuis R. Rodriguez 8383f2355cbSLuis R. Rodriguez last_sub_max_channel = cur_sub_max_channel; 8393f2355cbSLuis R. Rodriguez 840cc5d8a37SLuis R. Rodriguez num_rules++; 841cc5d8a37SLuis R. Rodriguez 842cc5d8a37SLuis R. Rodriguez if (country_ie_len >= 3) { 8433f2355cbSLuis R. Rodriguez country_ie += 3; 8443f2355cbSLuis R. Rodriguez country_ie_len -= 3; 845cc5d8a37SLuis R. Rodriguez } 8463f2355cbSLuis R. Rodriguez 847fb1fc7adSLuis R. Rodriguez /* 848fb1fc7adSLuis R. Rodriguez * Note: this is not a IEEE requirement but 849fb1fc7adSLuis R. Rodriguez * simply a memory requirement 850fb1fc7adSLuis R. Rodriguez */ 8513f2355cbSLuis R. Rodriguez if (num_rules > NL80211_MAX_SUPP_REG_RULES) 8523f2355cbSLuis R. Rodriguez return NULL; 8533f2355cbSLuis R. Rodriguez } 8543f2355cbSLuis R. Rodriguez 8553f2355cbSLuis R. Rodriguez country_ie = triplets_start; 8563f2355cbSLuis R. Rodriguez country_ie_len = len_at_triplet; 8573f2355cbSLuis R. Rodriguez 8583f2355cbSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 8593f2355cbSLuis R. Rodriguez (num_rules * sizeof(struct ieee80211_reg_rule)); 8603f2355cbSLuis R. Rodriguez 8613f2355cbSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 8623f2355cbSLuis R. Rodriguez if (!rd) 8633f2355cbSLuis R. Rodriguez return NULL; 8643f2355cbSLuis R. Rodriguez 8653f2355cbSLuis R. Rodriguez rd->n_reg_rules = num_rules; 8663f2355cbSLuis R. Rodriguez rd->alpha2[0] = alpha2[0]; 8673f2355cbSLuis R. Rodriguez rd->alpha2[1] = alpha2[1]; 8683f2355cbSLuis R. Rodriguez 8693f2355cbSLuis R. Rodriguez /* This time around we fill in the rd */ 8703f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 87102e68a3dSLuis R. Rodriguez int end_channel = 0; 8723f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 8733f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 8743f2355cbSLuis R. Rodriguez struct ieee80211_reg_rule *reg_rule = NULL; 8753f2355cbSLuis R. Rodriguez struct ieee80211_freq_range *freq_range = NULL; 8763f2355cbSLuis R. Rodriguez struct ieee80211_power_rule *power_rule = NULL; 8773f2355cbSLuis R. Rodriguez 878fb1fc7adSLuis R. Rodriguez /* 879fb1fc7adSLuis R. Rodriguez * Must parse if dot11RegulatoryClassesRequired is true, 880fb1fc7adSLuis R. Rodriguez * we don't support this yet 881fb1fc7adSLuis R. Rodriguez */ 8823f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 8833f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 8843f2355cbSLuis R. Rodriguez country_ie += 3; 8853f2355cbSLuis R. Rodriguez country_ie_len -= 3; 8863f2355cbSLuis R. Rodriguez continue; 8873f2355cbSLuis R. Rodriguez } 8883f2355cbSLuis R. Rodriguez 889cc5d8a37SLuis R. Rodriguez if (triplet->chans.first_channel == 0) { 890cc5d8a37SLuis R. Rodriguez country_ie++; 891cc5d8a37SLuis R. Rodriguez country_ie_len--; 892cc5d8a37SLuis R. Rodriguez break; 893cc5d8a37SLuis R. Rodriguez } 894cc5d8a37SLuis R. Rodriguez 8953f2355cbSLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 8963f2355cbSLuis R. Rodriguez freq_range = ®_rule->freq_range; 8973f2355cbSLuis R. Rodriguez power_rule = ®_rule->power_rule; 8983f2355cbSLuis R. Rodriguez 8993f2355cbSLuis R. Rodriguez reg_rule->flags = flags; 9003f2355cbSLuis R. Rodriguez 90102e68a3dSLuis R. Rodriguez /* 2 GHz */ 90284920e3eSLuis R. Rodriguez if (band == IEEE80211_BAND_2GHZ) 90302e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 904e99c7cd5SLuis R. Rodriguez triplet->chans.num_channels -1; 90502e68a3dSLuis R. Rodriguez else 90602e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 90702e68a3dSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 90802e68a3dSLuis R. Rodriguez 90984920e3eSLuis R. Rodriguez end_channel = max_subband_chan(band, 91084920e3eSLuis R. Rodriguez triplet->chans.first_channel, 911cc5d8a37SLuis R. Rodriguez end_channel, 912cc5d8a37SLuis R. Rodriguez triplet->chans.max_power, 913cc5d8a37SLuis R. Rodriguez &country_ie, 914cc5d8a37SLuis R. Rodriguez &country_ie_len); 915cc5d8a37SLuis R. Rodriguez 916fb1fc7adSLuis R. Rodriguez /* 917fb1fc7adSLuis R. Rodriguez * The +10 is since the regulatory domain expects 9183f2355cbSLuis R. Rodriguez * the actual band edge, not the center of freq for 9193f2355cbSLuis R. Rodriguez * its start and end freqs, assuming 20 MHz bandwidth on 920fb1fc7adSLuis R. Rodriguez * the channels passed 921fb1fc7adSLuis R. Rodriguez */ 9223f2355cbSLuis R. Rodriguez freq_range->start_freq_khz = 9233f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 9243f2355cbSLuis R. Rodriguez triplet->chans.first_channel) - 10); 9253f2355cbSLuis R. Rodriguez freq_range->end_freq_khz = 9263f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 92702e68a3dSLuis R. Rodriguez end_channel) + 10); 9283f2355cbSLuis R. Rodriguez 929fb1fc7adSLuis R. Rodriguez /* 930fb1fc7adSLuis R. Rodriguez * These are large arbitrary values we use to intersect later. 931fb1fc7adSLuis R. Rodriguez * Increment this if we ever support >= 40 MHz channels 932fb1fc7adSLuis R. Rodriguez * in IEEE 802.11 933fb1fc7adSLuis R. Rodriguez */ 9343f2355cbSLuis R. Rodriguez freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); 9353f2355cbSLuis R. Rodriguez power_rule->max_antenna_gain = DBI_TO_MBI(100); 93608030db6SLuis R. Rodriguez power_rule->max_eirp = DBM_TO_MBM(triplet->chans.max_power); 9373f2355cbSLuis R. Rodriguez 938cc5d8a37SLuis R. Rodriguez i++; 939cc5d8a37SLuis R. Rodriguez 940cc5d8a37SLuis R. Rodriguez if (country_ie_len >= 3) { 9413f2355cbSLuis R. Rodriguez country_ie += 3; 9423f2355cbSLuis R. Rodriguez country_ie_len -= 3; 943cc5d8a37SLuis R. Rodriguez } 9443f2355cbSLuis R. Rodriguez 9453f2355cbSLuis R. Rodriguez BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); 9463f2355cbSLuis R. Rodriguez } 9473f2355cbSLuis R. Rodriguez 9483f2355cbSLuis R. Rodriguez return rd; 9493f2355cbSLuis R. Rodriguez } 9503f2355cbSLuis R. Rodriguez 9513f2355cbSLuis R. Rodriguez 952fb1fc7adSLuis R. Rodriguez /* 953fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 954fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 955fb1fc7adSLuis R. Rodriguez */ 9569c96477dSLuis R. Rodriguez static int reg_rules_intersect( 9579c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 9589c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 9599c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 9609c96477dSLuis R. Rodriguez { 9619c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 9629c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 9639c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 9649c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 9659c96477dSLuis R. Rodriguez u32 freq_diff; 9669c96477dSLuis R. Rodriguez 9679c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 9689c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 9699c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 9709c96477dSLuis R. Rodriguez 9719c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 9729c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 9739c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 9749c96477dSLuis R. Rodriguez 9759c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 9769c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 9779c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 9789c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 9799c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 9809c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 9819c96477dSLuis R. Rodriguez 9829c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 9839c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 9849c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 9859c96477dSLuis R. Rodriguez 9869c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 9879c96477dSLuis R. Rodriguez power_rule2->max_eirp); 9889c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 9899c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 9909c96477dSLuis R. Rodriguez 9919c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 9929c96477dSLuis R. Rodriguez 9939c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 9949c96477dSLuis R. Rodriguez return -EINVAL; 9959c96477dSLuis R. Rodriguez 9969c96477dSLuis R. Rodriguez return 0; 9979c96477dSLuis R. Rodriguez } 9989c96477dSLuis R. Rodriguez 9999c96477dSLuis R. Rodriguez /** 10009c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 10019c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 10029c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 10039c96477dSLuis R. Rodriguez * 10049c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 10059c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 10069c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 10079c96477dSLuis R. Rodriguez * 10089c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 10099c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 10109c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 10119c96477dSLuis R. Rodriguez */ 10129c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 10139c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 10149c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 10159c96477dSLuis R. Rodriguez { 10169c96477dSLuis R. Rodriguez int r, size_of_regd; 10179c96477dSLuis R. Rodriguez unsigned int x, y; 10189c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 10199c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 10209c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 10219c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 10229c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 10239c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 10249c96477dSLuis R. Rodriguez 10259c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 10269c96477dSLuis R. Rodriguez intersected_rule = &irule; 10279c96477dSLuis R. Rodriguez 10289c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 10299c96477dSLuis R. Rodriguez 10309c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 10319c96477dSLuis R. Rodriguez return NULL; 10329c96477dSLuis R. Rodriguez 1033fb1fc7adSLuis R. Rodriguez /* 1034fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 10359c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 10369c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 10379c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 1038fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 1039fb1fc7adSLuis R. Rodriguez */ 10409c96477dSLuis R. Rodriguez 10419c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 10429c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 10439c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 10449c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 10459c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 10469c96477dSLuis R. Rodriguez intersected_rule)) 10479c96477dSLuis R. Rodriguez num_rules++; 10489c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 10499c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 10509c96477dSLuis R. Rodriguez } 10519c96477dSLuis R. Rodriguez } 10529c96477dSLuis R. Rodriguez 10539c96477dSLuis R. Rodriguez if (!num_rules) 10549c96477dSLuis R. Rodriguez return NULL; 10559c96477dSLuis R. Rodriguez 10569c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 10579c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 10589c96477dSLuis R. Rodriguez 10599c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 10609c96477dSLuis R. Rodriguez if (!rd) 10619c96477dSLuis R. Rodriguez return NULL; 10629c96477dSLuis R. Rodriguez 10639c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 10649c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 10659c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 10669c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 1067fb1fc7adSLuis R. Rodriguez /* 1068fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 10699c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 1070fb1fc7adSLuis R. Rodriguez * a memcpy() 1071fb1fc7adSLuis R. Rodriguez */ 10729c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 10739c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 10749c96477dSLuis R. Rodriguez intersected_rule); 1075fb1fc7adSLuis R. Rodriguez /* 1076fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 1077fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 1078fb1fc7adSLuis R. Rodriguez */ 10799c96477dSLuis R. Rodriguez if (r) 10809c96477dSLuis R. Rodriguez continue; 10819c96477dSLuis R. Rodriguez rule_idx++; 10829c96477dSLuis R. Rodriguez } 10839c96477dSLuis R. Rodriguez } 10849c96477dSLuis R. Rodriguez 10859c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 10869c96477dSLuis R. Rodriguez kfree(rd); 10879c96477dSLuis R. Rodriguez return NULL; 10889c96477dSLuis R. Rodriguez } 10899c96477dSLuis R. Rodriguez 10909c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 10919c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 10929c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 10939c96477dSLuis R. Rodriguez 10949c96477dSLuis R. Rodriguez return rd; 10959c96477dSLuis R. Rodriguez } 10969c96477dSLuis R. Rodriguez 1097fb1fc7adSLuis R. Rodriguez /* 1098fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 1099fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 1100fb1fc7adSLuis R. Rodriguez */ 1101b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 1102b2e1b302SLuis R. Rodriguez { 1103b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 1104b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 1105b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 1106b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 1107b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 1108b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 1109b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 1110b2e1b302SLuis R. Rodriguez return channel_flags; 1111b2e1b302SLuis R. Rodriguez } 1112b2e1b302SLuis R. Rodriguez 11131fa25e41SLuis R. Rodriguez static int freq_reg_info_regd(struct wiphy *wiphy, 11141fa25e41SLuis R. Rodriguez u32 center_freq, 1115038659e7SLuis R. Rodriguez u32 desired_bw_khz, 11161fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 11171fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *custom_regd) 11188318d78aSJohannes Berg { 11198318d78aSJohannes Berg int i; 11200c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 11213e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *regd; 1122038659e7SLuis R. Rodriguez bool bw_fits = false; 1123038659e7SLuis R. Rodriguez 1124038659e7SLuis R. Rodriguez if (!desired_bw_khz) 1125038659e7SLuis R. Rodriguez desired_bw_khz = MHZ_TO_KHZ(20); 11268318d78aSJohannes Berg 11271fa25e41SLuis R. Rodriguez regd = custom_regd ? custom_regd : cfg80211_regdomain; 11283e0c3ff3SLuis R. Rodriguez 1129fb1fc7adSLuis R. Rodriguez /* 1130fb1fc7adSLuis R. Rodriguez * Follow the driver's regulatory domain, if present, unless a country 1131fb1fc7adSLuis R. Rodriguez * IE has been processed or a user wants to help complaince further 1132fb1fc7adSLuis R. Rodriguez */ 11337db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 11347db90f4aSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_USER && 11353e0c3ff3SLuis R. Rodriguez wiphy->regd) 11363e0c3ff3SLuis R. Rodriguez regd = wiphy->regd; 11373e0c3ff3SLuis R. Rodriguez 11383e0c3ff3SLuis R. Rodriguez if (!regd) 1139b2e1b302SLuis R. Rodriguez return -EINVAL; 1140b2e1b302SLuis R. Rodriguez 11413e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 1142b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 1143b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 1144b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 1145b2e1b302SLuis R. Rodriguez 11463e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 1147b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 1148b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 11490c7dc45dSLuis R. Rodriguez 1150fb1fc7adSLuis R. Rodriguez /* 1151fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 11520c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 1153fb1fc7adSLuis R. Rodriguez * not overwrite it once found 1154fb1fc7adSLuis R. Rodriguez */ 11550c7dc45dSLuis R. Rodriguez if (!band_rule_found) 11560c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 11570c7dc45dSLuis R. Rodriguez 1158038659e7SLuis R. Rodriguez bw_fits = reg_does_bw_fit(fr, 1159038659e7SLuis R. Rodriguez center_freq, 1160038659e7SLuis R. Rodriguez desired_bw_khz); 11610c7dc45dSLuis R. Rodriguez 1162038659e7SLuis R. Rodriguez if (band_rule_found && bw_fits) { 1163b2e1b302SLuis R. Rodriguez *reg_rule = rr; 1164038659e7SLuis R. Rodriguez return 0; 11658318d78aSJohannes Berg } 11668318d78aSJohannes Berg } 11678318d78aSJohannes Berg 11680c7dc45dSLuis R. Rodriguez if (!band_rule_found) 11690c7dc45dSLuis R. Rodriguez return -ERANGE; 11700c7dc45dSLuis R. Rodriguez 1171038659e7SLuis R. Rodriguez return -EINVAL; 1172b2e1b302SLuis R. Rodriguez } 117334f57347SLuis R. Rodriguez EXPORT_SYMBOL(freq_reg_info); 1174b2e1b302SLuis R. Rodriguez 1175038659e7SLuis R. Rodriguez int freq_reg_info(struct wiphy *wiphy, 1176038659e7SLuis R. Rodriguez u32 center_freq, 1177038659e7SLuis R. Rodriguez u32 desired_bw_khz, 11781fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 11791fa25e41SLuis R. Rodriguez { 1180ac46d48eSLuis R. Rodriguez assert_cfg80211_lock(); 1181038659e7SLuis R. Rodriguez return freq_reg_info_regd(wiphy, 1182038659e7SLuis R. Rodriguez center_freq, 1183038659e7SLuis R. Rodriguez desired_bw_khz, 1184038659e7SLuis R. Rodriguez reg_rule, 1185038659e7SLuis R. Rodriguez NULL); 11861fa25e41SLuis R. Rodriguez } 1187b2e1b302SLuis R. Rodriguez 1188038659e7SLuis R. Rodriguez /* 1189038659e7SLuis R. Rodriguez * Note that right now we assume the desired channel bandwidth 1190038659e7SLuis R. Rodriguez * is always 20 MHz for each individual channel (HT40 uses 20 MHz 1191038659e7SLuis R. Rodriguez * per channel, the primary and the extension channel). To support 1192038659e7SLuis R. Rodriguez * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a 1193038659e7SLuis R. Rodriguez * new ieee80211_channel.target_bw and re run the regulatory check 1194038659e7SLuis R. Rodriguez * on the wiphy with the target_bw specified. Then we can simply use 1195038659e7SLuis R. Rodriguez * that below for the desired_bw_khz below. 1196038659e7SLuis R. Rodriguez */ 1197a92a3ce7SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, 1198a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 1199b2e1b302SLuis R. Rodriguez { 1200b2e1b302SLuis R. Rodriguez int r; 1201038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 1202038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 1203b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 1204b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1205038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 1206a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1207a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 1208fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 1209a92a3ce7SLuis R. Rodriguez 1210761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1211761cf7ecSLuis R. Rodriguez 1212806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1213806a9e39SLuis R. Rodriguez 1214a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 1215a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 1216a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1217a92a3ce7SLuis R. Rodriguez 1218a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 1219b2e1b302SLuis R. Rodriguez 1220038659e7SLuis R. Rodriguez r = freq_reg_info(wiphy, 1221038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 1222038659e7SLuis R. Rodriguez desired_bw_khz, 1223038659e7SLuis R. Rodriguez ®_rule); 1224b2e1b302SLuis R. Rodriguez 1225b2e1b302SLuis R. Rodriguez if (r) { 1226fb1fc7adSLuis R. Rodriguez /* 1227fb1fc7adSLuis R. Rodriguez * This means no regulatory rule was found in the country IE 12280c7dc45dSLuis R. Rodriguez * with a frequency range on the center_freq's band, since 12290c7dc45dSLuis R. Rodriguez * IEEE-802.11 allows for a country IE to have a subset of the 12300c7dc45dSLuis R. Rodriguez * regulatory information provided in a country we ignore 12310c7dc45dSLuis R. Rodriguez * disabling the channel unless at least one reg rule was 12320c7dc45dSLuis R. Rodriguez * found on the center_freq's band. For details see this 12330c7dc45dSLuis R. Rodriguez * clarification: 12340c7dc45dSLuis R. Rodriguez * 12350c7dc45dSLuis R. Rodriguez * http://tinyurl.com/11d-clarification 12360c7dc45dSLuis R. Rodriguez */ 12370c7dc45dSLuis R. Rodriguez if (r == -ERANGE && 12387db90f4aSLuis R. Rodriguez last_request->initiator == 12397db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 12404113f751SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Leaving channel %d MHz " 12410c7dc45dSLuis R. Rodriguez "intact on %s - no rule found in band on " 12420c7dc45dSLuis R. Rodriguez "Country IE\n", 12430c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 12440c7dc45dSLuis R. Rodriguez } else { 1245fb1fc7adSLuis R. Rodriguez /* 1246fb1fc7adSLuis R. Rodriguez * In this case we know the country IE has at least one reg rule 1247fb1fc7adSLuis R. Rodriguez * for the band so we respect its band definitions 1248fb1fc7adSLuis R. Rodriguez */ 12497db90f4aSLuis R. Rodriguez if (last_request->initiator == 12507db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) 12514113f751SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Disabling " 12520c7dc45dSLuis R. Rodriguez "channel %d MHz on %s due to " 12530c7dc45dSLuis R. Rodriguez "Country IE\n", 12540c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 12558318d78aSJohannes Berg flags |= IEEE80211_CHAN_DISABLED; 12568318d78aSJohannes Berg chan->flags = flags; 12570c7dc45dSLuis R. Rodriguez } 12588318d78aSJohannes Berg return; 12598318d78aSJohannes Berg } 12608318d78aSJohannes Berg 1261b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1262038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1263038659e7SLuis R. Rodriguez 1264038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1265038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1266b2e1b302SLuis R. Rodriguez 12677db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1268806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 12695be83de5SJohannes Berg request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { 1270fb1fc7adSLuis R. Rodriguez /* 1271fb1fc7adSLuis R. Rodriguez * This gaurantees the driver's requested regulatory domain 1272f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 1273fb1fc7adSLuis R. Rodriguez * settings 1274fb1fc7adSLuis R. Rodriguez */ 1275f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 1276038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 1277f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 1278f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1279f976376dSLuis R. Rodriguez chan->max_power = chan->orig_mpwr = 1280f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 1281f976376dSLuis R. Rodriguez return; 1282f976376dSLuis R. Rodriguez } 1283f976376dSLuis R. Rodriguez 1284038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 12858318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 1286b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 1287253898c4SJohn W. Linville if (chan->orig_mpwr) 1288b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 1289b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 1290253898c4SJohn W. Linville else 1291b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 12928318d78aSJohannes Berg } 12938318d78aSJohannes Berg 1294a92a3ce7SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) 12958318d78aSJohannes Berg { 1296a92a3ce7SLuis R. Rodriguez unsigned int i; 1297a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1298a92a3ce7SLuis R. Rodriguez 1299a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1300a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 13018318d78aSJohannes Berg 13028318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 1303a92a3ce7SLuis R. Rodriguez handle_channel(wiphy, band, i); 13048318d78aSJohannes Berg } 13058318d78aSJohannes Berg 13067db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 13077db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 130814b9815aSLuis R. Rodriguez { 130914b9815aSLuis R. Rodriguez if (!last_request) 131014b9815aSLuis R. Rodriguez return true; 13117db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 13125be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 131314b9815aSLuis R. Rodriguez return true; 1314fb1fc7adSLuis R. Rodriguez /* 1315fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1316fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1317fb1fc7adSLuis R. Rodriguez */ 13185be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && 1319f976376dSLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) 132014b9815aSLuis R. Rodriguez return true; 132114b9815aSLuis R. Rodriguez return false; 132214b9815aSLuis R. Rodriguez } 132314b9815aSLuis R. Rodriguez 13247db90f4aSLuis R. Rodriguez static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 1325b2e1b302SLuis R. Rodriguez { 132679c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1327b2e1b302SLuis R. Rodriguez 132879c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 132979c97e97SJohannes Berg wiphy_update_regulatory(&rdev->wiphy, initiator); 1330b2e1b302SLuis R. Rodriguez } 1331b2e1b302SLuis R. Rodriguez 1332e38f8a7aSLuis R. Rodriguez static void handle_reg_beacon(struct wiphy *wiphy, 1333e38f8a7aSLuis R. Rodriguez unsigned int chan_idx, 1334e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1335e38f8a7aSLuis R. Rodriguez { 1336e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1337e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 13386bad8766SLuis R. Rodriguez bool channel_changed = false; 13396bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1340e38f8a7aSLuis R. Rodriguez 1341e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1342e38f8a7aSLuis R. Rodriguez 1343e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1344e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1345e38f8a7aSLuis R. Rodriguez 1346e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1347e38f8a7aSLuis R. Rodriguez return; 1348e38f8a7aSLuis R. Rodriguez 13496bad8766SLuis R. Rodriguez if (chan->beacon_found) 13506bad8766SLuis R. Rodriguez return; 13516bad8766SLuis R. Rodriguez 13526bad8766SLuis R. Rodriguez chan->beacon_found = true; 13536bad8766SLuis R. Rodriguez 13545be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) 135537184244SLuis R. Rodriguez return; 135637184244SLuis R. Rodriguez 13576bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 13586bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 13596bad8766SLuis R. Rodriguez 136037184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { 1361e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 13626bad8766SLuis R. Rodriguez channel_changed = true; 1363e38f8a7aSLuis R. Rodriguez } 1364e38f8a7aSLuis R. Rodriguez 136537184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IBSS) { 1366e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 13676bad8766SLuis R. Rodriguez channel_changed = true; 1368e38f8a7aSLuis R. Rodriguez } 1369e38f8a7aSLuis R. Rodriguez 13706bad8766SLuis R. Rodriguez if (channel_changed) 13716bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1372e38f8a7aSLuis R. Rodriguez } 1373e38f8a7aSLuis R. Rodriguez 1374e38f8a7aSLuis R. Rodriguez /* 1375e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1376e38f8a7aSLuis R. Rodriguez * new channel 1377e38f8a7aSLuis R. Rodriguez */ 1378e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1379e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1380e38f8a7aSLuis R. Rodriguez { 1381e38f8a7aSLuis R. Rodriguez unsigned int i; 1382e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1383e38f8a7aSLuis R. Rodriguez 1384e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1385e38f8a7aSLuis R. Rodriguez 1386e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1387e38f8a7aSLuis R. Rodriguez return; 1388e38f8a7aSLuis R. Rodriguez 1389e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1390e38f8a7aSLuis R. Rodriguez 1391e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1392e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1393e38f8a7aSLuis R. Rodriguez } 1394e38f8a7aSLuis R. Rodriguez 1395e38f8a7aSLuis R. Rodriguez /* 1396e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1397e38f8a7aSLuis R. Rodriguez */ 1398e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1399e38f8a7aSLuis R. Rodriguez { 1400e38f8a7aSLuis R. Rodriguez unsigned int i; 1401e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1402e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1403e38f8a7aSLuis R. Rodriguez 1404e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1405e38f8a7aSLuis R. Rodriguez 1406e38f8a7aSLuis R. Rodriguez if (list_empty(®_beacon_list)) 1407e38f8a7aSLuis R. Rodriguez return; 1408e38f8a7aSLuis R. Rodriguez 1409e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1410e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1411e38f8a7aSLuis R. Rodriguez continue; 1412e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1413e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1414e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1415e38f8a7aSLuis R. Rodriguez } 1416e38f8a7aSLuis R. Rodriguez } 1417e38f8a7aSLuis R. Rodriguez 1418e38f8a7aSLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 1419e38f8a7aSLuis R. Rodriguez { 1420e38f8a7aSLuis R. Rodriguez if (is_world_regdom(cfg80211_regdomain->alpha2) || 1421e38f8a7aSLuis R. Rodriguez (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) 1422e38f8a7aSLuis R. Rodriguez return true; 1423b1ed8dddSLuis R. Rodriguez if (last_request && 1424b1ed8dddSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 14255be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 1426e38f8a7aSLuis R. Rodriguez return true; 1427e38f8a7aSLuis R. Rodriguez return false; 1428e38f8a7aSLuis R. Rodriguez } 1429e38f8a7aSLuis R. Rodriguez 1430e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1431e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1432e38f8a7aSLuis R. Rodriguez { 1433b1ed8dddSLuis R. Rodriguez /* 1434b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 1435b1ed8dddSLuis R. Rodriguez * have been processed yet. 1436b1ed8dddSLuis R. Rodriguez */ 1437b1ed8dddSLuis R. Rodriguez if (!last_request) 1438b1ed8dddSLuis R. Rodriguez return; 1439e38f8a7aSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 1440e38f8a7aSLuis R. Rodriguez return; 1441e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1442e38f8a7aSLuis R. Rodriguez } 1443e38f8a7aSLuis R. Rodriguez 1444038659e7SLuis R. Rodriguez static bool is_ht40_not_allowed(struct ieee80211_channel *chan) 1445038659e7SLuis R. Rodriguez { 1446038659e7SLuis R. Rodriguez if (!chan) 1447038659e7SLuis R. Rodriguez return true; 1448038659e7SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_DISABLED) 1449038659e7SLuis R. Rodriguez return true; 1450038659e7SLuis R. Rodriguez /* This would happen when regulatory rules disallow HT40 completely */ 1451038659e7SLuis R. Rodriguez if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) 1452038659e7SLuis R. Rodriguez return true; 1453038659e7SLuis R. Rodriguez return false; 1454038659e7SLuis R. Rodriguez } 1455038659e7SLuis R. Rodriguez 1456038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 1457038659e7SLuis R. Rodriguez enum ieee80211_band band, 1458038659e7SLuis R. Rodriguez unsigned int chan_idx) 1459038659e7SLuis R. Rodriguez { 1460038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1461038659e7SLuis R. Rodriguez struct ieee80211_channel *channel; 1462038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 1463038659e7SLuis R. Rodriguez unsigned int i; 1464038659e7SLuis R. Rodriguez 1465038659e7SLuis R. Rodriguez assert_cfg80211_lock(); 1466038659e7SLuis R. Rodriguez 1467038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1468038659e7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 1469038659e7SLuis R. Rodriguez channel = &sband->channels[chan_idx]; 1470038659e7SLuis R. Rodriguez 1471038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel)) { 1472038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 1473038659e7SLuis R. Rodriguez return; 1474038659e7SLuis R. Rodriguez } 1475038659e7SLuis R. Rodriguez 1476038659e7SLuis R. Rodriguez /* 1477038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 1478038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 1479038659e7SLuis R. Rodriguez */ 1480038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 1481038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 1482038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 1483038659e7SLuis R. Rodriguez channel_before = c; 1484038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 1485038659e7SLuis R. Rodriguez channel_after = c; 1486038659e7SLuis R. Rodriguez } 1487038659e7SLuis R. Rodriguez 1488038659e7SLuis R. Rodriguez /* 1489038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 1490038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 1491038659e7SLuis R. Rodriguez * to include that as well. 1492038659e7SLuis R. Rodriguez */ 1493038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_before)) 1494689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 1495038659e7SLuis R. Rodriguez else 1496689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 1497038659e7SLuis R. Rodriguez 1498038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_after)) 1499689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 1500038659e7SLuis R. Rodriguez else 1501689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 1502038659e7SLuis R. Rodriguez } 1503038659e7SLuis R. Rodriguez 1504038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1505038659e7SLuis R. Rodriguez enum ieee80211_band band) 1506038659e7SLuis R. Rodriguez { 1507038659e7SLuis R. Rodriguez unsigned int i; 1508038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1509038659e7SLuis R. Rodriguez 1510038659e7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1511038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1512038659e7SLuis R. Rodriguez 1513038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1514038659e7SLuis R. Rodriguez reg_process_ht_flags_channel(wiphy, band, i); 1515038659e7SLuis R. Rodriguez } 1516038659e7SLuis R. Rodriguez 1517038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1518038659e7SLuis R. Rodriguez { 1519038659e7SLuis R. Rodriguez enum ieee80211_band band; 1520038659e7SLuis R. Rodriguez 1521038659e7SLuis R. Rodriguez if (!wiphy) 1522038659e7SLuis R. Rodriguez return; 1523038659e7SLuis R. Rodriguez 1524038659e7SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1525038659e7SLuis R. Rodriguez if (wiphy->bands[band]) 1526038659e7SLuis R. Rodriguez reg_process_ht_flags_band(wiphy, band); 1527038659e7SLuis R. Rodriguez } 1528038659e7SLuis R. Rodriguez 1529038659e7SLuis R. Rodriguez } 1530038659e7SLuis R. Rodriguez 15317db90f4aSLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, 15327db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 15338318d78aSJohannes Berg { 15348318d78aSJohannes Berg enum ieee80211_band band; 1535d46e5b1dSLuis R. Rodriguez 15367db90f4aSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) 1537e38f8a7aSLuis R. Rodriguez goto out; 1538b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 15398318d78aSJohannes Berg if (wiphy->bands[band]) 1540a92a3ce7SLuis R. Rodriguez handle_band(wiphy, band); 1541b2e1b302SLuis R. Rodriguez } 1542e38f8a7aSLuis R. Rodriguez out: 1543e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1544038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 1545b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1546716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 1547b2e1b302SLuis R. Rodriguez } 1548b2e1b302SLuis R. Rodriguez 15491fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 15501fa25e41SLuis R. Rodriguez enum ieee80211_band band, 15511fa25e41SLuis R. Rodriguez unsigned int chan_idx, 15521fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 15531fa25e41SLuis R. Rodriguez { 15541fa25e41SLuis R. Rodriguez int r; 1555038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 1556038659e7SLuis R. Rodriguez u32 bw_flags = 0; 15571fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 15581fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1559038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 15601fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 15611fa25e41SLuis R. Rodriguez struct ieee80211_channel *chan; 15621fa25e41SLuis R. Rodriguez 1563abc7381bSLuis R. Rodriguez assert_reg_lock(); 1564ac46d48eSLuis R. Rodriguez 15651fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 15661fa25e41SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 15671fa25e41SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 15681fa25e41SLuis R. Rodriguez 1569038659e7SLuis R. Rodriguez r = freq_reg_info_regd(wiphy, 1570038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 1571038659e7SLuis R. Rodriguez desired_bw_khz, 1572038659e7SLuis R. Rodriguez ®_rule, 1573038659e7SLuis R. Rodriguez regd); 15741fa25e41SLuis R. Rodriguez 15751fa25e41SLuis R. Rodriguez if (r) { 15761fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 15771fa25e41SLuis R. Rodriguez return; 15781fa25e41SLuis R. Rodriguez } 15791fa25e41SLuis R. Rodriguez 15801fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1581038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 15821fa25e41SLuis R. Rodriguez 1583038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1584038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1585038659e7SLuis R. Rodriguez 1586038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 15871fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 15881fa25e41SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 15891fa25e41SLuis R. Rodriguez } 15901fa25e41SLuis R. Rodriguez 15911fa25e41SLuis R. Rodriguez static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, 15921fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 15931fa25e41SLuis R. Rodriguez { 15941fa25e41SLuis R. Rodriguez unsigned int i; 15951fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 15961fa25e41SLuis R. Rodriguez 15971fa25e41SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 15981fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 15991fa25e41SLuis R. Rodriguez 16001fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 16011fa25e41SLuis R. Rodriguez handle_channel_custom(wiphy, band, i, regd); 16021fa25e41SLuis R. Rodriguez } 16031fa25e41SLuis R. Rodriguez 16041fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 16051fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 16061fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 16071fa25e41SLuis R. Rodriguez { 16081fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1609bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1610ac46d48eSLuis R. Rodriguez 1611abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 16121fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1613bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1614bbcf3f02SLuis R. Rodriguez continue; 16151fa25e41SLuis R. Rodriguez handle_band_custom(wiphy, band, regd); 1616bbcf3f02SLuis R. Rodriguez bands_set++; 16171fa25e41SLuis R. Rodriguez } 1618abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1619bbcf3f02SLuis R. Rodriguez 1620bbcf3f02SLuis R. Rodriguez /* 1621bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 1622bbcf3f02SLuis R. Rodriguez * on your device's supportd bands. 1623bbcf3f02SLuis R. Rodriguez */ 1624bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 16251fa25e41SLuis R. Rodriguez } 16261fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 16271fa25e41SLuis R. Rodriguez 1628fb1fc7adSLuis R. Rodriguez /* 1629fb1fc7adSLuis R. Rodriguez * Return value which can be used by ignore_request() to indicate 1630fb1fc7adSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains 1631fb1fc7adSLuis R. Rodriguez */ 16329c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 16339c96477dSLuis R. Rodriguez 163484fa4f43SJohannes Berg /* This has the logic which determines when a new request 163584fa4f43SJohannes Berg * should be ignored. */ 16362f92cd2eSLuis R. Rodriguez static int ignore_request(struct wiphy *wiphy, 16372f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 163884fa4f43SJohannes Berg { 1639806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1640761cf7ecSLuis R. Rodriguez 1641761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1642761cf7ecSLuis R. Rodriguez 164384fa4f43SJohannes Berg /* All initial requests are respected */ 164484fa4f43SJohannes Berg if (!last_request) 164584fa4f43SJohannes Berg return 0; 164684fa4f43SJohannes Berg 16472f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 16487db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 1649ba25c141SLuis R. Rodriguez return -EINVAL; 16507db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1651806a9e39SLuis R. Rodriguez 1652806a9e39SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1653806a9e39SLuis R. Rodriguez 16542f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 165584fa4f43SJohannes Berg return -EINVAL; 16567db90f4aSLuis R. Rodriguez if (last_request->initiator == 16577db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1658806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 165984fa4f43SJohannes Berg /* 166084fa4f43SJohannes Berg * Two cards with two APs claiming different 16611fe90b03SThadeu Lima de Souza Cascardo * Country IE alpha2s. We could 166284fa4f43SJohannes Berg * intersect them, but that seems unlikely 166384fa4f43SJohannes Berg * to be correct. Reject second one for now. 166484fa4f43SJohannes Berg */ 16652f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 166684fa4f43SJohannes Berg return -EOPNOTSUPP; 166784fa4f43SJohannes Berg return -EALREADY; 166884fa4f43SJohannes Berg } 1669fb1fc7adSLuis R. Rodriguez /* 1670fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1671fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1672fb1fc7adSLuis R. Rodriguez */ 16732f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 167484fa4f43SJohannes Berg return 0; 167584fa4f43SJohannes Berg return -EALREADY; 167684fa4f43SJohannes Berg } 16773f2355cbSLuis R. Rodriguez return REG_INTERSECT; 16787db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 16797db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { 16802f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 1681e74b1e7fSLuis R. Rodriguez return 0; 1682e74b1e7fSLuis R. Rodriguez return -EALREADY; 1683e74b1e7fSLuis R. Rodriguez } 1684fff32c04SLuis R. Rodriguez 1685fff32c04SLuis R. Rodriguez /* 1686fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1687fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1688fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1689fff32c04SLuis R. Rodriguez */ 16907db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 16912f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1692fff32c04SLuis R. Rodriguez return -EALREADY; 1693fff32c04SLuis R. Rodriguez 16943e0c3ff3SLuis R. Rodriguez return REG_INTERSECT; 16957db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 16967db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 16979c96477dSLuis R. Rodriguez return REG_INTERSECT; 1698fb1fc7adSLuis R. Rodriguez /* 1699fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1700fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1701fb1fc7adSLuis R. Rodriguez */ 17027db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && 17033f2355cbSLuis R. Rodriguez last_request->intersect) 17043f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 1705fb1fc7adSLuis R. Rodriguez /* 1706fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1707fb1fc7adSLuis R. Rodriguez * requests have been processed 1708fb1fc7adSLuis R. Rodriguez */ 17097db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || 17107db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || 17117db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 171269b1572bSLuis R. Rodriguez if (regdom_changes(last_request->alpha2)) 17135eebade6SLuis R. Rodriguez return -EAGAIN; 17145eebade6SLuis R. Rodriguez } 17155eebade6SLuis R. Rodriguez 1716baeb66feSJohn W. Linville if (!regdom_changes(pending_request->alpha2)) 1717e74b1e7fSLuis R. Rodriguez return -EALREADY; 1718e74b1e7fSLuis R. Rodriguez 171984fa4f43SJohannes Berg return 0; 172084fa4f43SJohannes Berg } 172184fa4f43SJohannes Berg 172284fa4f43SJohannes Berg return -EINVAL; 172384fa4f43SJohannes Berg } 172484fa4f43SJohannes Berg 1725d1c96a9aSLuis R. Rodriguez /** 1726d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1727d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1728d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 172928da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1730d1c96a9aSLuis R. Rodriguez * 1731d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 173228da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1733d1c96a9aSLuis R. Rodriguez * 1734d1c96a9aSLuis R. Rodriguez * Returns zero if all went fine, %-EALREADY if a regulatory domain had 1735d1c96a9aSLuis R. Rodriguez * already been set or other standard error codes. 1736d1c96a9aSLuis R. Rodriguez * 1737abc7381bSLuis R. Rodriguez * Caller must hold &cfg80211_mutex and ®_mutex 1738d1c96a9aSLuis R. Rodriguez */ 173928da32d7SLuis R. Rodriguez static int __regulatory_hint(struct wiphy *wiphy, 174028da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1741b2e1b302SLuis R. Rodriguez { 17429c96477dSLuis R. Rodriguez bool intersect = false; 1743b2e1b302SLuis R. Rodriguez int r = 0; 1744b2e1b302SLuis R. Rodriguez 1745761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1746761cf7ecSLuis R. Rodriguez 17472f92cd2eSLuis R. Rodriguez r = ignore_request(wiphy, pending_request); 17489c96477dSLuis R. Rodriguez 17493e0c3ff3SLuis R. Rodriguez if (r == REG_INTERSECT) { 17507db90f4aSLuis R. Rodriguez if (pending_request->initiator == 17517db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 17523e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1753d951c1ddSLuis R. Rodriguez if (r) { 1754d951c1ddSLuis R. Rodriguez kfree(pending_request); 1755b2e1b302SLuis R. Rodriguez return r; 17563e0c3ff3SLuis R. Rodriguez } 1757d951c1ddSLuis R. Rodriguez } 17583e0c3ff3SLuis R. Rodriguez intersect = true; 17593e0c3ff3SLuis R. Rodriguez } else if (r) { 1760fb1fc7adSLuis R. Rodriguez /* 1761fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 17623e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1763fb1fc7adSLuis R. Rodriguez * wiphy 1764fb1fc7adSLuis R. Rodriguez */ 176528da32d7SLuis R. Rodriguez if (r == -EALREADY && 17667db90f4aSLuis R. Rodriguez pending_request->initiator == 17677db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 17683e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1769d951c1ddSLuis R. Rodriguez if (r) { 1770d951c1ddSLuis R. Rodriguez kfree(pending_request); 17713e0c3ff3SLuis R. Rodriguez return r; 1772d951c1ddSLuis R. Rodriguez } 17733e0c3ff3SLuis R. Rodriguez r = -EALREADY; 17743e0c3ff3SLuis R. Rodriguez goto new_request; 17753e0c3ff3SLuis R. Rodriguez } 1776d951c1ddSLuis R. Rodriguez kfree(pending_request); 17773e0c3ff3SLuis R. Rodriguez return r; 17783e0c3ff3SLuis R. Rodriguez } 1779b2e1b302SLuis R. Rodriguez 17803e0c3ff3SLuis R. Rodriguez new_request: 1781f6037d09SJohannes Berg kfree(last_request); 1782d951c1ddSLuis R. Rodriguez 1783d951c1ddSLuis R. Rodriguez last_request = pending_request; 1784d951c1ddSLuis R. Rodriguez last_request->intersect = intersect; 1785d951c1ddSLuis R. Rodriguez 1786d951c1ddSLuis R. Rodriguez pending_request = NULL; 17873e0c3ff3SLuis R. Rodriguez 17883e0c3ff3SLuis R. Rodriguez /* When r == REG_INTERSECT we do need to call CRDA */ 178973d54c9eSLuis R. Rodriguez if (r < 0) { 179073d54c9eSLuis R. Rodriguez /* 179173d54c9eSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 179273d54c9eSLuis R. Rodriguez * have applied the requested regulatory domain before we just 179373d54c9eSLuis R. Rodriguez * inform userspace we have processed the request 179473d54c9eSLuis R. Rodriguez */ 179573d54c9eSLuis R. Rodriguez if (r == -EALREADY) 179673d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 17973e0c3ff3SLuis R. Rodriguez return r; 179873d54c9eSLuis R. Rodriguez } 17993e0c3ff3SLuis R. Rodriguez 1800d951c1ddSLuis R. Rodriguez return call_crda(last_request->alpha2); 1801b2e1b302SLuis R. Rodriguez } 1802b2e1b302SLuis R. Rodriguez 180330a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 1804d951c1ddSLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 1805fe33eb39SLuis R. Rodriguez { 1806fe33eb39SLuis R. Rodriguez int r = 0; 1807fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1808fe33eb39SLuis R. Rodriguez 1809fe33eb39SLuis R. Rodriguez BUG_ON(!reg_request->alpha2); 1810fe33eb39SLuis R. Rodriguez 1811fe33eb39SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1812abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 1813fe33eb39SLuis R. Rodriguez 1814fe33eb39SLuis R. Rodriguez if (wiphy_idx_valid(reg_request->wiphy_idx)) 1815fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1816fe33eb39SLuis R. Rodriguez 18177db90f4aSLuis R. Rodriguez if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1818fe33eb39SLuis R. Rodriguez !wiphy) { 1819d951c1ddSLuis R. Rodriguez kfree(reg_request); 1820fe33eb39SLuis R. Rodriguez goto out; 1821fe33eb39SLuis R. Rodriguez } 1822fe33eb39SLuis R. Rodriguez 182328da32d7SLuis R. Rodriguez r = __regulatory_hint(wiphy, reg_request); 1824fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 18255be83de5SJohannes Berg if (r == -EALREADY && wiphy && 18265be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) 1827fe33eb39SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 1828fe33eb39SLuis R. Rodriguez out: 1829abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1830fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1831fe33eb39SLuis R. Rodriguez } 1832fe33eb39SLuis R. Rodriguez 18337db90f4aSLuis R. Rodriguez /* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */ 1834fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1835fe33eb39SLuis R. Rodriguez { 1836fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request; 1837fe33eb39SLuis R. Rodriguez 1838fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1839fe33eb39SLuis R. Rodriguez while (!list_empty(®_requests_list)) { 1840fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1841fe33eb39SLuis R. Rodriguez struct regulatory_request, 1842fe33eb39SLuis R. Rodriguez list); 1843fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1844fe33eb39SLuis R. Rodriguez 1845d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1846d951c1ddSLuis R. Rodriguez reg_process_hint(reg_request); 1847fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1848fe33eb39SLuis R. Rodriguez } 1849fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1850fe33eb39SLuis R. Rodriguez } 1851fe33eb39SLuis R. Rodriguez 1852e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1853e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1854e38f8a7aSLuis R. Rodriguez { 185579c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1856e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1857e38f8a7aSLuis R. Rodriguez 1858abc7381bSLuis R. Rodriguez /* 1859abc7381bSLuis R. Rodriguez * No need to hold the reg_mutex here as we just touch wiphys 1860abc7381bSLuis R. Rodriguez * and do not read or access regulatory variables. 1861abc7381bSLuis R. Rodriguez */ 1862e38f8a7aSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1863e38f8a7aSLuis R. Rodriguez 1864e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1865e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1866e38f8a7aSLuis R. Rodriguez 1867e38f8a7aSLuis R. Rodriguez if (list_empty(®_pending_beacons)) { 1868e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1869e38f8a7aSLuis R. Rodriguez goto out; 1870e38f8a7aSLuis R. Rodriguez } 1871e38f8a7aSLuis R. Rodriguez 1872e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1873e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1874e38f8a7aSLuis R. Rodriguez 1875e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1876e38f8a7aSLuis R. Rodriguez 1877e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 187879c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 187979c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 1880e38f8a7aSLuis R. Rodriguez 1881e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1882e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1883e38f8a7aSLuis R. Rodriguez } 1884e38f8a7aSLuis R. Rodriguez 1885e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1886e38f8a7aSLuis R. Rodriguez out: 1887e38f8a7aSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1888e38f8a7aSLuis R. Rodriguez } 1889e38f8a7aSLuis R. Rodriguez 1890fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1891fe33eb39SLuis R. Rodriguez { 1892fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1893e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 1894fe33eb39SLuis R. Rodriguez } 1895fe33eb39SLuis R. Rodriguez 1896fe33eb39SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 1897fe33eb39SLuis R. Rodriguez 1898fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1899fe33eb39SLuis R. Rodriguez { 1900fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1901fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1902fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1903fe33eb39SLuis R. Rodriguez 1904fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1905fe33eb39SLuis R. Rodriguez } 1906fe33eb39SLuis R. Rodriguez 1907fe33eb39SLuis R. Rodriguez /* Core regulatory hint -- happens once during cfg80211_init() */ 1908ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1909ba25c141SLuis R. Rodriguez { 1910ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1911ba25c141SLuis R. Rodriguez 1912ba25c141SLuis R. Rodriguez BUG_ON(last_request); 1913ba25c141SLuis R. Rodriguez 1914ba25c141SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1915ba25c141SLuis R. Rodriguez GFP_KERNEL); 1916ba25c141SLuis R. Rodriguez if (!request) 1917ba25c141SLuis R. Rodriguez return -ENOMEM; 1918ba25c141SLuis R. Rodriguez 1919ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1920ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 19217db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 1922ba25c141SLuis R. Rodriguez 19235078b2e3SLuis R. Rodriguez /* 19245078b2e3SLuis R. Rodriguez * This ensures last_request is populated once modules 19255078b2e3SLuis R. Rodriguez * come swinging in and calling regulatory hints and 19265078b2e3SLuis R. Rodriguez * wiphy_apply_custom_regulatory(). 19275078b2e3SLuis R. Rodriguez */ 1928a2bff269SLuis R. Rodriguez reg_process_hint(request); 19295078b2e3SLuis R. Rodriguez 1930fe33eb39SLuis R. Rodriguez return 0; 1931ba25c141SLuis R. Rodriguez } 1932ba25c141SLuis R. Rodriguez 1933fe33eb39SLuis R. Rodriguez /* User hints */ 1934fe33eb39SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2) 1935b2e1b302SLuis R. Rodriguez { 1936fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1937fe33eb39SLuis R. Rodriguez 1938be3d4810SJohannes Berg BUG_ON(!alpha2); 1939b2e1b302SLuis R. Rodriguez 1940fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1941fe33eb39SLuis R. Rodriguez if (!request) 1942fe33eb39SLuis R. Rodriguez return -ENOMEM; 1943fe33eb39SLuis R. Rodriguez 1944fe33eb39SLuis R. Rodriguez request->wiphy_idx = WIPHY_IDX_STALE; 1945fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1946fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1947e12822e1SLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER; 1948fe33eb39SLuis R. Rodriguez 1949fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1950fe33eb39SLuis R. Rodriguez 1951fe33eb39SLuis R. Rodriguez return 0; 1952fe33eb39SLuis R. Rodriguez } 1953fe33eb39SLuis R. Rodriguez 1954fe33eb39SLuis R. Rodriguez /* Driver hints */ 1955fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1956fe33eb39SLuis R. Rodriguez { 1957fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1958fe33eb39SLuis R. Rodriguez 1959fe33eb39SLuis R. Rodriguez BUG_ON(!alpha2); 1960fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy); 1961fe33eb39SLuis R. Rodriguez 1962fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1963fe33eb39SLuis R. Rodriguez if (!request) 1964fe33eb39SLuis R. Rodriguez return -ENOMEM; 1965fe33eb39SLuis R. Rodriguez 1966fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1967fe33eb39SLuis R. Rodriguez 1968fe33eb39SLuis R. Rodriguez /* Must have registered wiphy first */ 1969fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); 1970fe33eb39SLuis R. Rodriguez 1971fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1972fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 19737db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 1974fe33eb39SLuis R. Rodriguez 1975fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1976fe33eb39SLuis R. Rodriguez 1977fe33eb39SLuis R. Rodriguez return 0; 1978b2e1b302SLuis R. Rodriguez } 1979b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1980b2e1b302SLuis R. Rodriguez 1981abc7381bSLuis R. Rodriguez /* Caller must hold reg_mutex */ 19823f2355cbSLuis R. Rodriguez static bool reg_same_country_ie_hint(struct wiphy *wiphy, 19833f2355cbSLuis R. Rodriguez u32 country_ie_checksum) 19843f2355cbSLuis R. Rodriguez { 1985806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1986806a9e39SLuis R. Rodriguez 1987abc7381bSLuis R. Rodriguez assert_reg_lock(); 1988761cf7ecSLuis R. Rodriguez 1989cc0b6fe8SLuis R. Rodriguez if (unlikely(last_request->initiator != 1990cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE)) 1991cc0b6fe8SLuis R. Rodriguez return false; 1992cc0b6fe8SLuis R. Rodriguez 1993806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1994806a9e39SLuis R. Rodriguez 1995806a9e39SLuis R. Rodriguez if (!request_wiphy) 19963f2355cbSLuis R. Rodriguez return false; 1997806a9e39SLuis R. Rodriguez 1998806a9e39SLuis R. Rodriguez if (likely(request_wiphy != wiphy)) 19993f2355cbSLuis R. Rodriguez return !country_ie_integrity_changes(country_ie_checksum); 2000fb1fc7adSLuis R. Rodriguez /* 2001fb1fc7adSLuis R. Rodriguez * We should not have let these through at this point, they 20023f2355cbSLuis R. Rodriguez * should have been picked up earlier by the first alpha2 check 2003fb1fc7adSLuis R. Rodriguez * on the device 2004fb1fc7adSLuis R. Rodriguez */ 20053f2355cbSLuis R. Rodriguez if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) 20063f2355cbSLuis R. Rodriguez return true; 20073f2355cbSLuis R. Rodriguez return false; 20083f2355cbSLuis R. Rodriguez } 20093f2355cbSLuis R. Rodriguez 20104b44c8bcSLuis R. Rodriguez /* 20114b44c8bcSLuis R. Rodriguez * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and 20124b44c8bcSLuis R. Rodriguez * therefore cannot iterate over the rdev list here. 20134b44c8bcSLuis R. Rodriguez */ 20143f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 201584920e3eSLuis R. Rodriguez enum ieee80211_band band, 20163f2355cbSLuis R. Rodriguez u8 *country_ie, 20173f2355cbSLuis R. Rodriguez u8 country_ie_len) 20183f2355cbSLuis R. Rodriguez { 20193f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 20203f2355cbSLuis R. Rodriguez char alpha2[2]; 20213f2355cbSLuis R. Rodriguez u32 checksum = 0; 20223f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 2023fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 20243f2355cbSLuis R. Rodriguez 2025abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 20263f2355cbSLuis R. Rodriguez 20279828b017SLuis R. Rodriguez if (unlikely(!last_request)) 20289828b017SLuis R. Rodriguez goto out; 2029d335fe63SLuis R. Rodriguez 20303f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 20313f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 20323f2355cbSLuis R. Rodriguez goto out; 20333f2355cbSLuis R. Rodriguez 20343f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 20353f2355cbSLuis R. Rodriguez goto out; 20363f2355cbSLuis R. Rodriguez 2037fb1fc7adSLuis R. Rodriguez /* 2038fb1fc7adSLuis R. Rodriguez * Pending country IE processing, this can happen after we 20393f2355cbSLuis R. Rodriguez * call CRDA and wait for a response if a beacon was received before 2040fb1fc7adSLuis R. Rodriguez * we were able to process the last regulatory_hint_11d() call 2041fb1fc7adSLuis R. Rodriguez */ 20423f2355cbSLuis R. Rodriguez if (country_ie_regdomain) 20433f2355cbSLuis R. Rodriguez goto out; 20443f2355cbSLuis R. Rodriguez 20453f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 20463f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 20473f2355cbSLuis R. Rodriguez 20483f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 20493f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 20503f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 20513f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 20523f2355cbSLuis R. Rodriguez 2053fb1fc7adSLuis R. Rodriguez /* 20548b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 20554b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 20564b44c8bcSLuis R. Rodriguez * cfg80211_mutex. 2057fb1fc7adSLuis R. Rodriguez */ 2058cc0b6fe8SLuis R. Rodriguez if (likely(last_request->initiator == 2059cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE && 20604b44c8bcSLuis R. Rodriguez wiphy_idx_valid(last_request->wiphy_idx))) 20613f2355cbSLuis R. Rodriguez goto out; 20623f2355cbSLuis R. Rodriguez 206384920e3eSLuis R. Rodriguez rd = country_ie_2_rd(band, country_ie, country_ie_len, &checksum); 2064b74d12e1SLuis R. Rodriguez if (!rd) { 2065b74d12e1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Ignoring bogus country IE\n"); 20663f2355cbSLuis R. Rodriguez goto out; 2067b74d12e1SLuis R. Rodriguez } 20683f2355cbSLuis R. Rodriguez 2069915278e0SLuis R. Rodriguez /* 2070915278e0SLuis R. Rodriguez * This will not happen right now but we leave it here for the 20713f2355cbSLuis R. Rodriguez * the future when we want to add suspend/resume support and having 20723f2355cbSLuis R. Rodriguez * the user move to another country after doing so, or having the user 2073915278e0SLuis R. Rodriguez * move to another AP. Right now we just trust the first AP. 2074915278e0SLuis R. Rodriguez * 2075915278e0SLuis R. Rodriguez * If we hit this before we add this support we want to be informed of 2076915278e0SLuis R. Rodriguez * it as it would indicate a mistake in the current design 2077915278e0SLuis R. Rodriguez */ 2078915278e0SLuis R. Rodriguez if (WARN_ON(reg_same_country_ie_hint(wiphy, checksum))) 20790441d6ffSLuis R. Rodriguez goto free_rd_out; 20803f2355cbSLuis R. Rodriguez 2081fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2082fe33eb39SLuis R. Rodriguez if (!request) 2083fe33eb39SLuis R. Rodriguez goto free_rd_out; 2084fe33eb39SLuis R. Rodriguez 2085fb1fc7adSLuis R. Rodriguez /* 2086fb1fc7adSLuis R. Rodriguez * We keep this around for when CRDA comes back with a response so 2087fb1fc7adSLuis R. Rodriguez * we can intersect with that 2088fb1fc7adSLuis R. Rodriguez */ 20893f2355cbSLuis R. Rodriguez country_ie_regdomain = rd; 20903f2355cbSLuis R. Rodriguez 2091fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 2092fe33eb39SLuis R. Rodriguez request->alpha2[0] = rd->alpha2[0]; 2093fe33eb39SLuis R. Rodriguez request->alpha2[1] = rd->alpha2[1]; 20947db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 2095fe33eb39SLuis R. Rodriguez request->country_ie_checksum = checksum; 2096fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 20973f2355cbSLuis R. Rodriguez 2098abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2099fe33eb39SLuis R. Rodriguez 2100fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2101fe33eb39SLuis R. Rodriguez 2102fe33eb39SLuis R. Rodriguez return; 21030441d6ffSLuis R. Rodriguez 21040441d6ffSLuis R. Rodriguez free_rd_out: 21050441d6ffSLuis R. Rodriguez kfree(rd); 21063f2355cbSLuis R. Rodriguez out: 2107abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 21083f2355cbSLuis R. Rodriguez } 2109b2e1b302SLuis R. Rodriguez 2110e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 2111e38f8a7aSLuis R. Rodriguez { 2112e38f8a7aSLuis R. Rodriguez if (freq == ieee80211_channel_to_frequency(12) || 2113e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(13) || 2114e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(14)) 2115e38f8a7aSLuis R. Rodriguez return true; 2116e38f8a7aSLuis R. Rodriguez return false; 2117e38f8a7aSLuis R. Rodriguez } 2118e38f8a7aSLuis R. Rodriguez 2119e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 2120e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 2121e38f8a7aSLuis R. Rodriguez gfp_t gfp) 2122e38f8a7aSLuis R. Rodriguez { 2123e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 2124e38f8a7aSLuis R. Rodriguez 2125e38f8a7aSLuis R. Rodriguez if (likely((beacon_chan->beacon_found || 2126e38f8a7aSLuis R. Rodriguez (beacon_chan->flags & IEEE80211_CHAN_RADAR) || 2127e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 2128e38f8a7aSLuis R. Rodriguez !freq_is_chan_12_13_14(beacon_chan->center_freq))))) 2129e38f8a7aSLuis R. Rodriguez return 0; 2130e38f8a7aSLuis R. Rodriguez 2131e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 2132e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 2133e38f8a7aSLuis R. Rodriguez return -ENOMEM; 2134e38f8a7aSLuis R. Rodriguez 21354113f751SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Found new beacon on " 2136e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", 2137e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 2138e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 2139e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 21404113f751SLuis R. Rodriguez 2141e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 2142e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 2143e38f8a7aSLuis R. Rodriguez 2144e38f8a7aSLuis R. Rodriguez 2145e38f8a7aSLuis R. Rodriguez /* 2146e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 2147e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 2148e38f8a7aSLuis R. Rodriguez */ 2149e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2150e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 2151e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2152e38f8a7aSLuis R. Rodriguez 2153e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 2154e38f8a7aSLuis R. Rodriguez 2155e38f8a7aSLuis R. Rodriguez return 0; 2156e38f8a7aSLuis R. Rodriguez } 2157e38f8a7aSLuis R. Rodriguez 2158a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 2159b2e1b302SLuis R. Rodriguez { 2160b2e1b302SLuis R. Rodriguez unsigned int i; 2161a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 2162a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 2163a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 2164b2e1b302SLuis R. Rodriguez 2165269ac5fdSKalle Valo printk(KERN_INFO " (start_freq - end_freq @ bandwidth), " 2166b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 2167b2e1b302SLuis R. Rodriguez 2168b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 2169b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 2170b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 2171b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 2172b2e1b302SLuis R. Rodriguez 2173fb1fc7adSLuis R. Rodriguez /* 2174fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 2175fb1fc7adSLuis R. Rodriguez * in certain regions 2176fb1fc7adSLuis R. Rodriguez */ 2177b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 2178269ac5fdSKalle Valo printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " 2179b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 2180b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2181b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 2182b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 2183b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 2184b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 2185b2e1b302SLuis R. Rodriguez else 2186269ac5fdSKalle Valo printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " 2187b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 2188b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2189b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 2190b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 2191b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 2192b2e1b302SLuis R. Rodriguez } 2193b2e1b302SLuis R. Rodriguez } 2194b2e1b302SLuis R. Rodriguez 2195a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 2196b2e1b302SLuis R. Rodriguez { 2197b2e1b302SLuis R. Rodriguez 21983f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 21993f2355cbSLuis R. Rodriguez 22007db90f4aSLuis R. Rodriguez if (last_request->initiator == 22017db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 220279c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 220379c97e97SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx( 2204806a9e39SLuis R. Rodriguez last_request->wiphy_idx); 220579c97e97SJohannes Berg if (rdev) { 22063f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 22073f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 220879c97e97SJohannes Berg rdev->country_ie_alpha2[0], 220979c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 22103f2355cbSLuis R. Rodriguez } else 22113f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 22123f2355cbSLuis R. Rodriguez "domain intersected: \n"); 22133f2355cbSLuis R. Rodriguez } else 22143f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 2215039498c6SLuis R. Rodriguez "domain intersected: \n"); 22163f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 2217b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 2218b2e1b302SLuis R. Rodriguez "domain updated:\n"); 2219b2e1b302SLuis R. Rodriguez else { 2220b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 2221b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 2222b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 2223b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 2224b2e1b302SLuis R. Rodriguez else 2225b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 2226b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 2227b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 2228b2e1b302SLuis R. Rodriguez } 2229b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2230b2e1b302SLuis R. Rodriguez } 2231b2e1b302SLuis R. Rodriguez 22322df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 2233b2e1b302SLuis R. Rodriguez { 2234b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 2235b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 2236b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2237b2e1b302SLuis R. Rodriguez } 2238b2e1b302SLuis R. Rodriguez 22393f2355cbSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 22403f2355cbSLuis R. Rodriguez static void reg_country_ie_process_debug( 22413f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 22423f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 22433f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 22443f2355cbSLuis R. Rodriguez { 22453f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Received country IE:\n"); 22463f2355cbSLuis R. Rodriguez print_regdomain_info(country_ie_regdomain); 22473f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); 22483f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 22493f2355cbSLuis R. Rodriguez if (intersected_rd) { 22503f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: We intersect both of these " 22513f2355cbSLuis R. Rodriguez "and get:\n"); 2252667ecd01SLuis R. Rodriguez print_regdomain_info(intersected_rd); 22533f2355cbSLuis R. Rodriguez return; 22543f2355cbSLuis R. Rodriguez } 22553f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); 22563f2355cbSLuis R. Rodriguez } 22573f2355cbSLuis R. Rodriguez #else 22583f2355cbSLuis R. Rodriguez static inline void reg_country_ie_process_debug( 22593f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 22603f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 22613f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 22623f2355cbSLuis R. Rodriguez { 22633f2355cbSLuis R. Rodriguez } 22643f2355cbSLuis R. Rodriguez #endif 22653f2355cbSLuis R. Rodriguez 2266d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 2267a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 2268b2e1b302SLuis R. Rodriguez { 22699c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 227079c97e97SJohannes Berg struct cfg80211_registered_device *rdev = NULL; 2271806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 2272b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 2273b2e1b302SLuis R. Rodriguez 2274b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 2275f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 2276b2e1b302SLuis R. Rodriguez return -EINVAL; 2277b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 2278b2e1b302SLuis R. Rodriguez return 0; 2279b2e1b302SLuis R. Rodriguez } 2280b2e1b302SLuis R. Rodriguez 2281b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 2282b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 2283b2e1b302SLuis R. Rodriguez return -EINVAL; 2284b2e1b302SLuis R. Rodriguez 2285f6037d09SJohannes Berg if (!last_request) 2286b2e1b302SLuis R. Rodriguez return -EINVAL; 2287b2e1b302SLuis R. Rodriguez 2288fb1fc7adSLuis R. Rodriguez /* 2289fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 22903f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 2291fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 2292fb1fc7adSLuis R. Rodriguez */ 22937db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2294fb1fc7adSLuis R. Rodriguez /* 2295fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 2296fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 2297fb1fc7adSLuis R. Rodriguez */ 2298baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 2299b2e1b302SLuis R. Rodriguez return -EINVAL; 23003f2355cbSLuis R. Rodriguez } 23013f2355cbSLuis R. Rodriguez 2302fb1fc7adSLuis R. Rodriguez /* 2303fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 2304b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 2305b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 2306fb1fc7adSLuis R. Rodriguez * internal EEPROM data 2307fb1fc7adSLuis R. Rodriguez */ 2308b2e1b302SLuis R. Rodriguez 2309f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 2310b2e1b302SLuis R. Rodriguez return -EINVAL; 2311b2e1b302SLuis R. Rodriguez 2312b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2313b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 2314b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 2315b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 2316b2e1b302SLuis R. Rodriguez return -EINVAL; 2317b2e1b302SLuis R. Rodriguez } 2318b2e1b302SLuis R. Rodriguez 2319806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2320806a9e39SLuis R. Rodriguez 2321b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 23223e0c3ff3SLuis R. Rodriguez int r; 23233e0c3ff3SLuis R. Rodriguez 23247db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { 23253e0c3ff3SLuis R. Rodriguez reset_regdomains(); 23263e0c3ff3SLuis R. Rodriguez cfg80211_regdomain = rd; 23273e0c3ff3SLuis R. Rodriguez return 0; 23283e0c3ff3SLuis R. Rodriguez } 23293e0c3ff3SLuis R. Rodriguez 2330fb1fc7adSLuis R. Rodriguez /* 2331fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 2332fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 2333fb1fc7adSLuis R. Rodriguez */ 23343e0c3ff3SLuis R. Rodriguez 2335558f6d32SLuis R. Rodriguez /* 2336558f6d32SLuis R. Rodriguez * Userspace could have sent two replies with only 2337558f6d32SLuis R. Rodriguez * one kernel request. 2338558f6d32SLuis R. Rodriguez */ 2339558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 2340558f6d32SLuis R. Rodriguez return -EALREADY; 23413e0c3ff3SLuis R. Rodriguez 2342806a9e39SLuis R. Rodriguez r = reg_copy_regd(&request_wiphy->regd, rd); 23433e0c3ff3SLuis R. Rodriguez if (r) 23443e0c3ff3SLuis R. Rodriguez return r; 23453e0c3ff3SLuis R. Rodriguez 2346b8295acdSLuis R. Rodriguez reset_regdomains(); 2347b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 2348b8295acdSLuis R. Rodriguez return 0; 2349b8295acdSLuis R. Rodriguez } 2350b8295acdSLuis R. Rodriguez 2351b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 2352b8295acdSLuis R. Rodriguez 23537db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2354b8295acdSLuis R. Rodriguez 23559c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 23569c96477dSLuis R. Rodriguez if (!intersected_rd) 23579c96477dSLuis R. Rodriguez return -EINVAL; 2358b8295acdSLuis R. Rodriguez 2359fb1fc7adSLuis R. Rodriguez /* 2360fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 23613e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2362fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2363fb1fc7adSLuis R. Rodriguez */ 23647db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) 2365806a9e39SLuis R. Rodriguez request_wiphy->regd = rd; 23663e0c3ff3SLuis R. Rodriguez else 23679c96477dSLuis R. Rodriguez kfree(rd); 23683e0c3ff3SLuis R. Rodriguez 2369b8295acdSLuis R. Rodriguez rd = NULL; 2370b8295acdSLuis R. Rodriguez 2371b8295acdSLuis R. Rodriguez reset_regdomains(); 2372b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2373b8295acdSLuis R. Rodriguez 2374b8295acdSLuis R. Rodriguez return 0; 23759c96477dSLuis R. Rodriguez } 23769c96477dSLuis R. Rodriguez 23773f2355cbSLuis R. Rodriguez /* 23783f2355cbSLuis R. Rodriguez * Country IE requests are handled a bit differently, we intersect 23793f2355cbSLuis R. Rodriguez * the country IE rd with what CRDA believes that country should have 23803f2355cbSLuis R. Rodriguez */ 23813f2355cbSLuis R. Rodriguez 2382729e9c76SLuis R. Rodriguez /* 2383729e9c76SLuis R. Rodriguez * Userspace could have sent two replies with only 2384729e9c76SLuis R. Rodriguez * one kernel request. By the second reply we would have 2385729e9c76SLuis R. Rodriguez * already processed and consumed the country_ie_regdomain. 2386729e9c76SLuis R. Rodriguez */ 2387729e9c76SLuis R. Rodriguez if (!country_ie_regdomain) 2388729e9c76SLuis R. Rodriguez return -EALREADY; 238986f04680SLuis R. Rodriguez BUG_ON(rd == country_ie_regdomain); 23903f2355cbSLuis R. Rodriguez 2391fb1fc7adSLuis R. Rodriguez /* 2392fb1fc7adSLuis R. Rodriguez * Intersect what CRDA returned and our what we 2393fb1fc7adSLuis R. Rodriguez * had built from the Country IE received 2394fb1fc7adSLuis R. Rodriguez */ 23953f2355cbSLuis R. Rodriguez 23963f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, country_ie_regdomain); 23973f2355cbSLuis R. Rodriguez 239886f04680SLuis R. Rodriguez reg_country_ie_process_debug(rd, 239986f04680SLuis R. Rodriguez country_ie_regdomain, 24003f2355cbSLuis R. Rodriguez intersected_rd); 24013f2355cbSLuis R. Rodriguez 24023f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 24033f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 24043f2355cbSLuis R. Rodriguez 24053f2355cbSLuis R. Rodriguez if (!intersected_rd) 24063f2355cbSLuis R. Rodriguez return -EINVAL; 24073f2355cbSLuis R. Rodriguez 240879c97e97SJohannes Berg rdev = wiphy_to_dev(request_wiphy); 24093f2355cbSLuis R. Rodriguez 241079c97e97SJohannes Berg rdev->country_ie_alpha2[0] = rd->alpha2[0]; 241179c97e97SJohannes Berg rdev->country_ie_alpha2[1] = rd->alpha2[1]; 241279c97e97SJohannes Berg rdev->env = last_request->country_ie_env; 24133f2355cbSLuis R. Rodriguez 24143f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 24153f2355cbSLuis R. Rodriguez 24163f2355cbSLuis R. Rodriguez kfree(rd); 24173f2355cbSLuis R. Rodriguez rd = NULL; 24183f2355cbSLuis R. Rodriguez 2419b8295acdSLuis R. Rodriguez reset_regdomains(); 24203f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2421b2e1b302SLuis R. Rodriguez 2422b2e1b302SLuis R. Rodriguez return 0; 2423b2e1b302SLuis R. Rodriguez } 2424b2e1b302SLuis R. Rodriguez 2425b2e1b302SLuis R. Rodriguez 2426fb1fc7adSLuis R. Rodriguez /* 2427fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2428b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2429fb1fc7adSLuis R. Rodriguez * kmalloc'd the rd structure. Caller must hold cfg80211_mutex 2430fb1fc7adSLuis R. Rodriguez */ 2431a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2432b2e1b302SLuis R. Rodriguez { 2433b2e1b302SLuis R. Rodriguez int r; 2434b2e1b302SLuis R. Rodriguez 2435761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2436761cf7ecSLuis R. Rodriguez 2437abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2438abc7381bSLuis R. Rodriguez 2439b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 2440b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 2441d2372b31SJohannes Berg if (r) { 2442d2372b31SJohannes Berg kfree(rd); 2443abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2444b2e1b302SLuis R. Rodriguez return r; 2445d2372b31SJohannes Berg } 2446b2e1b302SLuis R. Rodriguez 2447b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 2448a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 2449b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 2450b2e1b302SLuis R. Rodriguez 2451b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2452f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 2453b2e1b302SLuis R. Rodriguez 2454a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 2455b2e1b302SLuis R. Rodriguez 245673d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 245773d54c9eSLuis R. Rodriguez 2458abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2459abc7381bSLuis R. Rodriguez 2460b2e1b302SLuis R. Rodriguez return r; 2461b2e1b302SLuis R. Rodriguez } 2462b2e1b302SLuis R. Rodriguez 2463a1794390SLuis R. Rodriguez /* Caller must hold cfg80211_mutex */ 24643f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 24653f2355cbSLuis R. Rodriguez { 24660ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 2467806a9e39SLuis R. Rodriguez 2468761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2469761cf7ecSLuis R. Rodriguez 2470abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2471abc7381bSLuis R. Rodriguez 24720ef9ccddSChris Wright kfree(wiphy->regd); 24730ef9ccddSChris Wright 24740ad8acafSLuis R. Rodriguez if (last_request) 2475806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2476806a9e39SLuis R. Rodriguez 24770ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 2478abc7381bSLuis R. Rodriguez goto out; 24790ef9ccddSChris Wright 2480806a9e39SLuis R. Rodriguez last_request->wiphy_idx = WIPHY_IDX_STALE; 24813f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 2482abc7381bSLuis R. Rodriguez out: 2483abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 24843f2355cbSLuis R. Rodriguez } 24853f2355cbSLuis R. Rodriguez 2486b2e1b302SLuis R. Rodriguez int regulatory_init(void) 2487b2e1b302SLuis R. Rodriguez { 2488bcf4f99bSLuis R. Rodriguez int err = 0; 2489734366deSJohannes Berg 2490b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 2491b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 2492b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 2493734366deSJohannes Berg 2494fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 2495e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2496fe33eb39SLuis R. Rodriguez 2497a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 2498734366deSJohannes Berg 2499ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 2500ae9e4b0dSLuis R. Rodriguez err = regulatory_hint_core(cfg80211_regdomain->alpha2); 2501bcf4f99bSLuis R. Rodriguez if (err) { 2502bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2503bcf4f99bSLuis R. Rodriguez return err; 2504bcf4f99bSLuis R. Rodriguez /* 2505bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2506bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2507bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2508bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2509bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2510bcf4f99bSLuis R. Rodriguez */ 2511bcf4f99bSLuis R. Rodriguez printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " 2512bcf4f99bSLuis R. Rodriguez "to call CRDA during init"); 2513bcf4f99bSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 2514bcf4f99bSLuis R. Rodriguez /* We want to find out exactly why when debugging */ 2515bcf4f99bSLuis R. Rodriguez WARN_ON(err); 2516bcf4f99bSLuis R. Rodriguez #endif 2517bcf4f99bSLuis R. Rodriguez } 2518734366deSJohannes Berg 2519ae9e4b0dSLuis R. Rodriguez /* 2520ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 2521ae9e4b0dSLuis R. Rodriguez * as a user hint. 2522ae9e4b0dSLuis R. Rodriguez */ 2523ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 2524ae9e4b0dSLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom); 2525ae9e4b0dSLuis R. Rodriguez 2526b2e1b302SLuis R. Rodriguez return 0; 2527b2e1b302SLuis R. Rodriguez } 2528b2e1b302SLuis R. Rodriguez 2529b2e1b302SLuis R. Rodriguez void regulatory_exit(void) 2530b2e1b302SLuis R. Rodriguez { 2531fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2532e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2533fe33eb39SLuis R. Rodriguez 2534fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2535fe33eb39SLuis R. Rodriguez 2536a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 2537abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2538734366deSJohannes Berg 2539b2e1b302SLuis R. Rodriguez reset_regdomains(); 2540734366deSJohannes Berg 25413f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 25423f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 25433f2355cbSLuis R. Rodriguez 2544f6037d09SJohannes Berg kfree(last_request); 2545f6037d09SJohannes Berg 2546b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2547734366deSJohannes Berg 2548e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2549e38f8a7aSLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 2550e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2551e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2552e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2553e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2554e38f8a7aSLuis R. Rodriguez } 2555e38f8a7aSLuis R. Rodriguez } 2556e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2557e38f8a7aSLuis R. Rodriguez 2558e38f8a7aSLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 2559e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2560e38f8a7aSLuis R. Rodriguez ®_beacon_list, list) { 2561e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2562e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2563e38f8a7aSLuis R. Rodriguez } 2564e38f8a7aSLuis R. Rodriguez } 2565e38f8a7aSLuis R. Rodriguez 2566fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2567fe33eb39SLuis R. Rodriguez if (!list_empty(®_requests_list)) { 2568fe33eb39SLuis R. Rodriguez list_for_each_entry_safe(reg_request, tmp, 2569fe33eb39SLuis R. Rodriguez ®_requests_list, list) { 2570fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2571fe33eb39SLuis R. Rodriguez kfree(reg_request); 2572fe33eb39SLuis R. Rodriguez } 2573fe33eb39SLuis R. Rodriguez } 2574fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2575fe33eb39SLuis R. Rodriguez 2576abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2577a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 25788318d78aSJohannes Berg } 2579