18318d78aSJohannes Berg /* 28318d78aSJohannes Berg * Copyright 2002-2005, Instant802 Networks, Inc. 38318d78aSJohannes Berg * Copyright 2005-2006, Devicescape Software, Inc. 48318d78aSJohannes Berg * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 5b2e1b302SLuis R. Rodriguez * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com> 68318d78aSJohannes Berg * 78318d78aSJohannes Berg * This program is free software; you can redistribute it and/or modify 88318d78aSJohannes Berg * it under the terms of the GNU General Public License version 2 as 98318d78aSJohannes Berg * published by the Free Software Foundation. 108318d78aSJohannes Berg */ 118318d78aSJohannes Berg 12b2e1b302SLuis R. Rodriguez /** 13b2e1b302SLuis R. Rodriguez * DOC: Wireless regulatory infrastructure 148318d78aSJohannes Berg * 158318d78aSJohannes Berg * The usual implementation is for a driver to read a device EEPROM to 168318d78aSJohannes Berg * determine which regulatory domain it should be operating under, then 178318d78aSJohannes Berg * looking up the allowable channels in a driver-local table and finally 188318d78aSJohannes Berg * registering those channels in the wiphy structure. 198318d78aSJohannes Berg * 20b2e1b302SLuis R. Rodriguez * Another set of compliance enforcement is for drivers to use their 21b2e1b302SLuis R. Rodriguez * own compliance limits which can be stored on the EEPROM. The host 22b2e1b302SLuis R. Rodriguez * driver or firmware may ensure these are used. 23b2e1b302SLuis R. Rodriguez * 24b2e1b302SLuis R. Rodriguez * In addition to all this we provide an extra layer of regulatory 25b2e1b302SLuis R. Rodriguez * conformance. For drivers which do not have any regulatory 26b2e1b302SLuis R. Rodriguez * information CRDA provides the complete regulatory solution. 27b2e1b302SLuis R. Rodriguez * For others it provides a community effort on further restrictions 28b2e1b302SLuis R. Rodriguez * to enhance compliance. 29b2e1b302SLuis R. Rodriguez * 30b2e1b302SLuis R. Rodriguez * Note: When number of rules --> infinity we will not be able to 31b2e1b302SLuis R. Rodriguez * index on alpha2 any more, instead we'll probably have to 32b2e1b302SLuis R. Rodriguez * rely on some SHA1 checksum of the regdomain for example. 33b2e1b302SLuis R. Rodriguez * 348318d78aSJohannes Berg */ 358318d78aSJohannes Berg #include <linux/kernel.h> 36b2e1b302SLuis R. Rodriguez #include <linux/list.h> 37b2e1b302SLuis R. Rodriguez #include <linux/random.h> 38b2e1b302SLuis R. Rodriguez #include <linux/nl80211.h> 39b2e1b302SLuis R. Rodriguez #include <linux/platform_device.h> 408318d78aSJohannes Berg #include <net/wireless.h> 41b2e1b302SLuis R. Rodriguez #include <net/cfg80211.h> 428318d78aSJohannes Berg #include "core.h" 43b2e1b302SLuis R. Rodriguez #include "reg.h" 448318d78aSJohannes Berg 455166ccd2SLuis R. Rodriguez /* Receipt of information from last regulatory request */ 46f6037d09SJohannes Berg static struct regulatory_request *last_request; 47734366deSJohannes Berg 48b2e1b302SLuis R. Rodriguez /* To trigger userspace events */ 49b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 508318d78aSJohannes Berg 51b2e1b302SLuis R. Rodriguez /* Keep the ordering from large to small */ 52b2e1b302SLuis R. Rodriguez static u32 supported_bandwidths[] = { 53b2e1b302SLuis R. Rodriguez MHZ_TO_KHZ(40), 54b2e1b302SLuis R. Rodriguez MHZ_TO_KHZ(20), 558318d78aSJohannes Berg }; 568318d78aSJohannes Berg 57fb1fc7adSLuis R. Rodriguez /* 58fb1fc7adSLuis R. Rodriguez * Central wireless core regulatory domains, we only need two, 59734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 60fb1fc7adSLuis R. Rodriguez * information to give us an alpha2 61fb1fc7adSLuis R. Rodriguez */ 62f130347cSLuis R. Rodriguez const struct ieee80211_regdomain *cfg80211_regdomain; 63734366deSJohannes Berg 64fb1fc7adSLuis R. Rodriguez /* 65fb1fc7adSLuis R. Rodriguez * We use this as a place for the rd structure built from the 663f2355cbSLuis R. Rodriguez * last parsed country IE to rest until CRDA gets back to us with 67fb1fc7adSLuis R. Rodriguez * what it thinks should apply for the same country 68fb1fc7adSLuis R. Rodriguez */ 693f2355cbSLuis R. Rodriguez static const struct ieee80211_regdomain *country_ie_regdomain; 703f2355cbSLuis R. Rodriguez 71e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 72fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 73fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 74fe33eb39SLuis R. Rodriguez 75e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 76e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 77e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 78e38f8a7aSLuis R. Rodriguez 79e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 80e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 81e38f8a7aSLuis R. Rodriguez 82e38f8a7aSLuis R. Rodriguez struct reg_beacon { 83e38f8a7aSLuis R. Rodriguez struct list_head list; 84e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 85e38f8a7aSLuis R. Rodriguez }; 86e38f8a7aSLuis R. Rodriguez 87734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 88734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 893fc71f77SLuis R. Rodriguez .n_reg_rules = 3, 90734366deSJohannes Berg .alpha2 = "00", 91734366deSJohannes Berg .reg_rules = { 9268798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 9368798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 943fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 953fc71f77SLuis R. Rodriguez REG_RULE(5180-10, 5240+10, 40, 6, 23, 963fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 973fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 983fc71f77SLuis R. Rodriguez 993fc71f77SLuis R. Rodriguez /* NB: 5260 MHz - 5700 MHz requies DFS */ 1003fc71f77SLuis R. Rodriguez 1013fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 1023fc71f77SLuis R. Rodriguez REG_RULE(5745-10, 5825+10, 40, 6, 23, 1033fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1043fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 105734366deSJohannes Berg } 106734366deSJohannes Berg }; 107734366deSJohannes Berg 108a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 109a3d2eaf0SJohannes Berg &world_regdom; 110734366deSJohannes Berg 111734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 112734366deSJohannes Berg static char *ieee80211_regdom = "US"; 113734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 114734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 115734366deSJohannes Berg 116fb1fc7adSLuis R. Rodriguez /* 117fb1fc7adSLuis R. Rodriguez * We assume 40 MHz bandwidth for the old regulatory work. 118734366deSJohannes Berg * We make emphasis we are using the exact same frequencies 119fb1fc7adSLuis R. Rodriguez * as before 120fb1fc7adSLuis R. Rodriguez */ 121734366deSJohannes Berg 122734366deSJohannes Berg static const struct ieee80211_regdomain us_regdom = { 123734366deSJohannes Berg .n_reg_rules = 6, 124734366deSJohannes Berg .alpha2 = "US", 125734366deSJohannes Berg .reg_rules = { 126734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..11 */ 127734366deSJohannes Berg REG_RULE(2412-10, 2462+10, 40, 6, 27, 0), 128734366deSJohannes Berg /* IEEE 802.11a, channel 36 */ 129734366deSJohannes Berg REG_RULE(5180-10, 5180+10, 40, 6, 23, 0), 130734366deSJohannes Berg /* IEEE 802.11a, channel 40 */ 131734366deSJohannes Berg REG_RULE(5200-10, 5200+10, 40, 6, 23, 0), 132734366deSJohannes Berg /* IEEE 802.11a, channel 44 */ 133734366deSJohannes Berg REG_RULE(5220-10, 5220+10, 40, 6, 23, 0), 134734366deSJohannes Berg /* IEEE 802.11a, channels 48..64 */ 135734366deSJohannes Berg REG_RULE(5240-10, 5320+10, 40, 6, 23, 0), 136734366deSJohannes Berg /* IEEE 802.11a, channels 149..165, outdoor */ 137734366deSJohannes Berg REG_RULE(5745-10, 5825+10, 40, 6, 30, 0), 138734366deSJohannes Berg } 139734366deSJohannes Berg }; 140734366deSJohannes Berg 141734366deSJohannes Berg static const struct ieee80211_regdomain jp_regdom = { 142734366deSJohannes Berg .n_reg_rules = 3, 143734366deSJohannes Berg .alpha2 = "JP", 144734366deSJohannes Berg .reg_rules = { 145734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..14 */ 146734366deSJohannes Berg REG_RULE(2412-10, 2484+10, 40, 6, 20, 0), 147734366deSJohannes Berg /* IEEE 802.11a, channels 34..48 */ 148734366deSJohannes Berg REG_RULE(5170-10, 5240+10, 40, 6, 20, 149734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 150734366deSJohannes Berg /* IEEE 802.11a, channels 52..64 */ 151734366deSJohannes Berg REG_RULE(5260-10, 5320+10, 40, 6, 20, 152734366deSJohannes Berg NL80211_RRF_NO_IBSS | 153734366deSJohannes Berg NL80211_RRF_DFS), 154734366deSJohannes Berg } 155734366deSJohannes Berg }; 156734366deSJohannes Berg 157734366deSJohannes Berg static const struct ieee80211_regdomain eu_regdom = { 158734366deSJohannes Berg .n_reg_rules = 6, 159fb1fc7adSLuis R. Rodriguez /* 160fb1fc7adSLuis R. Rodriguez * This alpha2 is bogus, we leave it here just for stupid 161fb1fc7adSLuis R. Rodriguez * backward compatibility 162fb1fc7adSLuis R. Rodriguez */ 163734366deSJohannes Berg .alpha2 = "EU", 164734366deSJohannes Berg .reg_rules = { 165734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..13 */ 166734366deSJohannes Berg REG_RULE(2412-10, 2472+10, 40, 6, 20, 0), 167734366deSJohannes Berg /* IEEE 802.11a, channel 36 */ 168734366deSJohannes Berg REG_RULE(5180-10, 5180+10, 40, 6, 23, 169734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 170734366deSJohannes Berg /* IEEE 802.11a, channel 40 */ 171734366deSJohannes Berg REG_RULE(5200-10, 5200+10, 40, 6, 23, 172734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 173734366deSJohannes Berg /* IEEE 802.11a, channel 44 */ 174734366deSJohannes Berg REG_RULE(5220-10, 5220+10, 40, 6, 23, 175734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 176734366deSJohannes Berg /* IEEE 802.11a, channels 48..64 */ 177734366deSJohannes Berg REG_RULE(5240-10, 5320+10, 40, 6, 20, 178734366deSJohannes Berg NL80211_RRF_NO_IBSS | 179734366deSJohannes Berg NL80211_RRF_DFS), 180734366deSJohannes Berg /* IEEE 802.11a, channels 100..140 */ 181734366deSJohannes Berg REG_RULE(5500-10, 5700+10, 40, 6, 30, 182734366deSJohannes Berg NL80211_RRF_NO_IBSS | 183734366deSJohannes Berg NL80211_RRF_DFS), 184734366deSJohannes Berg } 185734366deSJohannes Berg }; 186734366deSJohannes Berg 187734366deSJohannes Berg static const struct ieee80211_regdomain *static_regdom(char *alpha2) 188734366deSJohannes Berg { 189734366deSJohannes Berg if (alpha2[0] == 'U' && alpha2[1] == 'S') 190734366deSJohannes Berg return &us_regdom; 191734366deSJohannes Berg if (alpha2[0] == 'J' && alpha2[1] == 'P') 192734366deSJohannes Berg return &jp_regdom; 193734366deSJohannes Berg if (alpha2[0] == 'E' && alpha2[1] == 'U') 194734366deSJohannes Berg return &eu_regdom; 195734366deSJohannes Berg /* Default, as per the old rules */ 196734366deSJohannes Berg return &us_regdom; 197734366deSJohannes Berg } 198734366deSJohannes Berg 199a3d2eaf0SJohannes Berg static bool is_old_static_regdom(const struct ieee80211_regdomain *rd) 200734366deSJohannes Berg { 201734366deSJohannes Berg if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom) 202734366deSJohannes Berg return true; 203734366deSJohannes Berg return false; 204734366deSJohannes Berg } 205734366deSJohannes Berg #else 206942b25cfSJohannes Berg static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd) 207942b25cfSJohannes Berg { 208942b25cfSJohannes Berg return false; 209942b25cfSJohannes Berg } 210942b25cfSJohannes Berg #endif 211942b25cfSJohannes Berg 212734366deSJohannes Berg static void reset_regdomains(void) 213734366deSJohannes Berg { 214942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 215942b25cfSJohannes Berg if (cfg80211_regdomain == cfg80211_world_regdom) 216942b25cfSJohannes Berg cfg80211_regdomain = NULL; 217942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 218942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 219942b25cfSJohannes Berg if (cfg80211_regdomain == &world_regdom) 220942b25cfSJohannes Berg cfg80211_regdomain = NULL; 221942b25cfSJohannes Berg if (is_old_static_regdom(cfg80211_regdomain)) 222942b25cfSJohannes Berg cfg80211_regdomain = NULL; 223942b25cfSJohannes Berg 224734366deSJohannes Berg kfree(cfg80211_regdomain); 225734366deSJohannes Berg kfree(cfg80211_world_regdom); 226734366deSJohannes Berg 227a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 228734366deSJohannes Berg cfg80211_regdomain = NULL; 229734366deSJohannes Berg } 230734366deSJohannes Berg 231fb1fc7adSLuis R. Rodriguez /* 232fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 233fb1fc7adSLuis R. Rodriguez * core upon initialization 234fb1fc7adSLuis R. Rodriguez */ 235a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 236734366deSJohannes Berg { 237f6037d09SJohannes Berg BUG_ON(!last_request); 238734366deSJohannes Berg 239734366deSJohannes Berg reset_regdomains(); 240734366deSJohannes Berg 241734366deSJohannes Berg cfg80211_world_regdom = rd; 242734366deSJohannes Berg cfg80211_regdomain = rd; 243734366deSJohannes Berg } 244734366deSJohannes Berg 245a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 246b2e1b302SLuis R. Rodriguez { 247b2e1b302SLuis R. Rodriguez if (!alpha2) 248b2e1b302SLuis R. Rodriguez return false; 249b2e1b302SLuis R. Rodriguez if (alpha2[0] == '0' && alpha2[1] == '0') 250b2e1b302SLuis R. Rodriguez return true; 251b2e1b302SLuis R. Rodriguez return false; 252b2e1b302SLuis R. Rodriguez } 253b2e1b302SLuis R. Rodriguez 254a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 255b2e1b302SLuis R. Rodriguez { 256b2e1b302SLuis R. Rodriguez if (!alpha2) 257b2e1b302SLuis R. Rodriguez return false; 258b2e1b302SLuis R. Rodriguez if (alpha2[0] != 0 && alpha2[1] != 0) 259b2e1b302SLuis R. Rodriguez return true; 260b2e1b302SLuis R. Rodriguez return false; 261b2e1b302SLuis R. Rodriguez } 262b2e1b302SLuis R. Rodriguez 263b2e1b302SLuis R. Rodriguez static bool is_alpha_upper(char letter) 264b2e1b302SLuis R. Rodriguez { 265b2e1b302SLuis R. Rodriguez /* ASCII A - Z */ 266b2e1b302SLuis R. Rodriguez if (letter >= 65 && letter <= 90) 267b2e1b302SLuis R. Rodriguez return true; 268b2e1b302SLuis R. Rodriguez return false; 269b2e1b302SLuis R. Rodriguez } 270b2e1b302SLuis R. Rodriguez 271a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 272b2e1b302SLuis R. Rodriguez { 273b2e1b302SLuis R. Rodriguez if (!alpha2) 274b2e1b302SLuis R. Rodriguez return false; 275fb1fc7adSLuis R. Rodriguez /* 276fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 277fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 278fb1fc7adSLuis R. Rodriguez */ 279b2e1b302SLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '9') 280b2e1b302SLuis R. Rodriguez return true; 281b2e1b302SLuis R. Rodriguez return false; 282b2e1b302SLuis R. Rodriguez } 283b2e1b302SLuis R. Rodriguez 2843f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2853f2355cbSLuis R. Rodriguez { 2863f2355cbSLuis R. Rodriguez if (!alpha2) 2873f2355cbSLuis R. Rodriguez return false; 288fb1fc7adSLuis R. Rodriguez /* 289fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 2903f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 291fb1fc7adSLuis R. Rodriguez * structures 292fb1fc7adSLuis R. Rodriguez */ 2933f2355cbSLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '8') 2943f2355cbSLuis R. Rodriguez return true; 2953f2355cbSLuis R. Rodriguez return false; 2963f2355cbSLuis R. Rodriguez } 2973f2355cbSLuis R. Rodriguez 298a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 299b2e1b302SLuis R. Rodriguez { 300b2e1b302SLuis R. Rodriguez if (!alpha2) 301b2e1b302SLuis R. Rodriguez return false; 302b2e1b302SLuis R. Rodriguez if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) 303b2e1b302SLuis R. Rodriguez return true; 304b2e1b302SLuis R. Rodriguez return false; 305b2e1b302SLuis R. Rodriguez } 306b2e1b302SLuis R. Rodriguez 307a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 308b2e1b302SLuis R. Rodriguez { 309b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 310b2e1b302SLuis R. Rodriguez return false; 311b2e1b302SLuis R. Rodriguez if (alpha2_x[0] == alpha2_y[0] && 312b2e1b302SLuis R. Rodriguez alpha2_x[1] == alpha2_y[1]) 313b2e1b302SLuis R. Rodriguez return true; 314b2e1b302SLuis R. Rodriguez return false; 315b2e1b302SLuis R. Rodriguez } 316b2e1b302SLuis R. Rodriguez 31769b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 318b2e1b302SLuis R. Rodriguez { 319761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 320761cf7ecSLuis R. Rodriguez 321b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 322b2e1b302SLuis R. Rodriguez return true; 323b2e1b302SLuis R. Rodriguez if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 324b2e1b302SLuis R. Rodriguez return false; 325b2e1b302SLuis R. Rodriguez return true; 326b2e1b302SLuis R. Rodriguez } 327b2e1b302SLuis R. Rodriguez 3283f2355cbSLuis R. Rodriguez /** 3293f2355cbSLuis R. Rodriguez * country_ie_integrity_changes - tells us if the country IE has changed 3303f2355cbSLuis R. Rodriguez * @checksum: checksum of country IE of fields we are interested in 3313f2355cbSLuis R. Rodriguez * 3323f2355cbSLuis R. Rodriguez * If the country IE has not changed you can ignore it safely. This is 3333f2355cbSLuis R. Rodriguez * useful to determine if two devices are seeing two different country IEs 3343f2355cbSLuis R. Rodriguez * even on the same alpha2. Note that this will return false if no IE has 3353f2355cbSLuis R. Rodriguez * been set on the wireless core yet. 3363f2355cbSLuis R. Rodriguez */ 3373f2355cbSLuis R. Rodriguez static bool country_ie_integrity_changes(u32 checksum) 3383f2355cbSLuis R. Rodriguez { 3393f2355cbSLuis R. Rodriguez /* If no IE has been set then the checksum doesn't change */ 3403f2355cbSLuis R. Rodriguez if (unlikely(!last_request->country_ie_checksum)) 3413f2355cbSLuis R. Rodriguez return false; 3423f2355cbSLuis R. Rodriguez if (unlikely(last_request->country_ie_checksum != checksum)) 3433f2355cbSLuis R. Rodriguez return true; 3443f2355cbSLuis R. Rodriguez return false; 3453f2355cbSLuis R. Rodriguez } 3463f2355cbSLuis R. Rodriguez 347fb1fc7adSLuis R. Rodriguez /* 348fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 349fb1fc7adSLuis R. Rodriguez * basis in userspace. 350fb1fc7adSLuis R. Rodriguez */ 351b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 352b2e1b302SLuis R. Rodriguez { 353b2e1b302SLuis R. Rodriguez char country_env[9 + 2] = "COUNTRY="; 354b2e1b302SLuis R. Rodriguez char *envp[] = { 355b2e1b302SLuis R. Rodriguez country_env, 356b2e1b302SLuis R. Rodriguez NULL 3578318d78aSJohannes Berg }; 3588318d78aSJohannes Berg 359b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 360b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", 361b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 362b2e1b302SLuis R. Rodriguez else 363b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA to update world " 364b2e1b302SLuis R. Rodriguez "regulatory domain\n"); 3658318d78aSJohannes Berg 366b2e1b302SLuis R. Rodriguez country_env[8] = alpha2[0]; 367b2e1b302SLuis R. Rodriguez country_env[9] = alpha2[1]; 3688318d78aSJohannes Berg 369b2e1b302SLuis R. Rodriguez return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); 370b2e1b302SLuis R. Rodriguez } 371b2e1b302SLuis R. Rodriguez 372b2e1b302SLuis R. Rodriguez /* Used by nl80211 before kmalloc'ing our regulatory domain */ 373a3d2eaf0SJohannes Berg bool reg_is_valid_request(const char *alpha2) 374b2e1b302SLuis R. Rodriguez { 375f6037d09SJohannes Berg if (!last_request) 376f6037d09SJohannes Berg return false; 377f6037d09SJohannes Berg 378f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 379b2e1b302SLuis R. Rodriguez } 380b2e1b302SLuis R. Rodriguez 381b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 382a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 383b2e1b302SLuis R. Rodriguez { 384a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 385b2e1b302SLuis R. Rodriguez u32 freq_diff; 386b2e1b302SLuis R. Rodriguez 38791e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 388b2e1b302SLuis R. Rodriguez return false; 389b2e1b302SLuis R. Rodriguez 390b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 391b2e1b302SLuis R. Rodriguez return false; 392b2e1b302SLuis R. Rodriguez 393b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 394b2e1b302SLuis R. Rodriguez 395d71aaf60SLuis R. Rodriguez if (freq_diff <= 0 || freq_range->max_bandwidth_khz > freq_diff) 396b2e1b302SLuis R. Rodriguez return false; 397b2e1b302SLuis R. Rodriguez 398b2e1b302SLuis R. Rodriguez return true; 399b2e1b302SLuis R. Rodriguez } 400b2e1b302SLuis R. Rodriguez 401a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 402b2e1b302SLuis R. Rodriguez { 403a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 404b2e1b302SLuis R. Rodriguez unsigned int i; 405b2e1b302SLuis R. Rodriguez 406b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 407b2e1b302SLuis R. Rodriguez return false; 408b2e1b302SLuis R. Rodriguez 40988dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 41088dc1c3fSLuis R. Rodriguez return false; 41188dc1c3fSLuis R. Rodriguez 412b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 413b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 414b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 415b2e1b302SLuis R. Rodriguez return false; 416b2e1b302SLuis R. Rodriguez } 417b2e1b302SLuis R. Rodriguez 418b2e1b302SLuis R. Rodriguez return true; 419b2e1b302SLuis R. Rodriguez } 420b2e1b302SLuis R. Rodriguez 421b2e1b302SLuis R. Rodriguez /* Returns value in KHz */ 422b2e1b302SLuis R. Rodriguez static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range, 423b2e1b302SLuis R. Rodriguez u32 freq) 424b2e1b302SLuis R. Rodriguez { 425b2e1b302SLuis R. Rodriguez unsigned int i; 426b2e1b302SLuis R. Rodriguez for (i = 0; i < ARRAY_SIZE(supported_bandwidths); i++) { 427b2e1b302SLuis R. Rodriguez u32 start_freq_khz = freq - supported_bandwidths[i]/2; 428b2e1b302SLuis R. Rodriguez u32 end_freq_khz = freq + supported_bandwidths[i]/2; 429b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 430b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 431b2e1b302SLuis R. Rodriguez return supported_bandwidths[i]; 432b2e1b302SLuis R. Rodriguez } 433b2e1b302SLuis R. Rodriguez return 0; 434b2e1b302SLuis R. Rodriguez } 435b2e1b302SLuis R. Rodriguez 4360c7dc45dSLuis R. Rodriguez /** 4370c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 4380c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 4390c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 4400c7dc45dSLuis R. Rodriguez * 4410c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 4420c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 4430c7dc45dSLuis R. Rodriguez * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is 4440c7dc45dSLuis R. Rodriguez * safe for now to assume that a frequency rule should not be part of a 4450c7dc45dSLuis R. Rodriguez * frequency's band if the start freq or end freq are off by more than 2 GHz. 4460c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 4470c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 4480c7dc45dSLuis R. Rodriguez **/ 4490c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 4500c7dc45dSLuis R. Rodriguez u32 freq_khz) 4510c7dc45dSLuis R. Rodriguez { 4520c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 4530c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4540c7dc45dSLuis R. Rodriguez return true; 4550c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4560c7dc45dSLuis R. Rodriguez return true; 4570c7dc45dSLuis R. Rodriguez return false; 4580c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 4590c7dc45dSLuis R. Rodriguez } 4600c7dc45dSLuis R. Rodriguez 461fb1fc7adSLuis R. Rodriguez /* 462fb1fc7adSLuis R. Rodriguez * Converts a country IE to a regulatory domain. A regulatory domain 4633f2355cbSLuis R. Rodriguez * structure has a lot of information which the IE doesn't yet have, 4643f2355cbSLuis R. Rodriguez * so for the other values we use upper max values as we will intersect 465fb1fc7adSLuis R. Rodriguez * with our userspace regulatory agent to get lower bounds. 466fb1fc7adSLuis R. Rodriguez */ 4673f2355cbSLuis R. Rodriguez static struct ieee80211_regdomain *country_ie_2_rd( 4683f2355cbSLuis R. Rodriguez u8 *country_ie, 4693f2355cbSLuis R. Rodriguez u8 country_ie_len, 4703f2355cbSLuis R. Rodriguez u32 *checksum) 4713f2355cbSLuis R. Rodriguez { 4723f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 4733f2355cbSLuis R. Rodriguez unsigned int i = 0; 4743f2355cbSLuis R. Rodriguez char alpha2[2]; 4753f2355cbSLuis R. Rodriguez u32 flags = 0; 4763f2355cbSLuis R. Rodriguez u32 num_rules = 0, size_of_regd = 0; 4773f2355cbSLuis R. Rodriguez u8 *triplets_start = NULL; 4783f2355cbSLuis R. Rodriguez u8 len_at_triplet = 0; 4793f2355cbSLuis R. Rodriguez /* the last channel we have registered in a subband (triplet) */ 4803f2355cbSLuis R. Rodriguez int last_sub_max_channel = 0; 4813f2355cbSLuis R. Rodriguez 4823f2355cbSLuis R. Rodriguez *checksum = 0xDEADBEEF; 4833f2355cbSLuis R. Rodriguez 4843f2355cbSLuis R. Rodriguez /* Country IE requirements */ 4853f2355cbSLuis R. Rodriguez BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || 4863f2355cbSLuis R. Rodriguez country_ie_len & 0x01); 4873f2355cbSLuis R. Rodriguez 4883f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 4893f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 4903f2355cbSLuis R. Rodriguez 4913f2355cbSLuis R. Rodriguez /* 4923f2355cbSLuis R. Rodriguez * Third octet can be: 4933f2355cbSLuis R. Rodriguez * 'I' - Indoor 4943f2355cbSLuis R. Rodriguez * 'O' - Outdoor 4953f2355cbSLuis R. Rodriguez * 4963f2355cbSLuis R. Rodriguez * anything else we assume is no restrictions 4973f2355cbSLuis R. Rodriguez */ 4983f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 4993f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_OUTDOOR; 5003f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 5013f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_INDOOR; 5023f2355cbSLuis R. Rodriguez 5033f2355cbSLuis R. Rodriguez country_ie += 3; 5043f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5053f2355cbSLuis R. Rodriguez 5063f2355cbSLuis R. Rodriguez triplets_start = country_ie; 5073f2355cbSLuis R. Rodriguez len_at_triplet = country_ie_len; 5083f2355cbSLuis R. Rodriguez 5093f2355cbSLuis R. Rodriguez *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); 5103f2355cbSLuis R. Rodriguez 511fb1fc7adSLuis R. Rodriguez /* 512fb1fc7adSLuis R. Rodriguez * We need to build a reg rule for each triplet, but first we must 5133f2355cbSLuis R. Rodriguez * calculate the number of reg rules we will need. We will need one 514fb1fc7adSLuis R. Rodriguez * for each channel subband 515fb1fc7adSLuis R. Rodriguez */ 5163f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 517615aab4bSLuis R. Rodriguez int end_channel = 0; 5183f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 5193f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 5203f2355cbSLuis R. Rodriguez int cur_sub_max_channel = 0, cur_channel = 0; 5213f2355cbSLuis R. Rodriguez 5223f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 5233f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 5243f2355cbSLuis R. Rodriguez country_ie += 3; 5253f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5263f2355cbSLuis R. Rodriguez continue; 5273f2355cbSLuis R. Rodriguez } 5283f2355cbSLuis R. Rodriguez 529615aab4bSLuis R. Rodriguez /* 2 GHz */ 530615aab4bSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 531615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 532615aab4bSLuis R. Rodriguez triplet->chans.num_channels; 533615aab4bSLuis R. Rodriguez else 534615aab4bSLuis R. Rodriguez /* 535615aab4bSLuis R. Rodriguez * 5 GHz -- For example in country IEs if the first 536615aab4bSLuis R. Rodriguez * channel given is 36 and the number of channels is 4 537615aab4bSLuis R. Rodriguez * then the individual channel numbers defined for the 538615aab4bSLuis R. Rodriguez * 5 GHz PHY by these parameters are: 36, 40, 44, and 48 539615aab4bSLuis R. Rodriguez * and not 36, 37, 38, 39. 540615aab4bSLuis R. Rodriguez * 541615aab4bSLuis R. Rodriguez * See: http://tinyurl.com/11d-clarification 542615aab4bSLuis R. Rodriguez */ 543615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 544615aab4bSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 545615aab4bSLuis R. Rodriguez 5463f2355cbSLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 547615aab4bSLuis R. Rodriguez cur_sub_max_channel = end_channel; 5483f2355cbSLuis R. Rodriguez 5493f2355cbSLuis R. Rodriguez /* Basic sanity check */ 5503f2355cbSLuis R. Rodriguez if (cur_sub_max_channel < cur_channel) 5513f2355cbSLuis R. Rodriguez return NULL; 5523f2355cbSLuis R. Rodriguez 553fb1fc7adSLuis R. Rodriguez /* 554fb1fc7adSLuis R. Rodriguez * Do not allow overlapping channels. Also channels 5553f2355cbSLuis R. Rodriguez * passed in each subband must be monotonically 556fb1fc7adSLuis R. Rodriguez * increasing 557fb1fc7adSLuis R. Rodriguez */ 5583f2355cbSLuis R. Rodriguez if (last_sub_max_channel) { 5593f2355cbSLuis R. Rodriguez if (cur_channel <= last_sub_max_channel) 5603f2355cbSLuis R. Rodriguez return NULL; 5613f2355cbSLuis R. Rodriguez if (cur_sub_max_channel <= last_sub_max_channel) 5623f2355cbSLuis R. Rodriguez return NULL; 5633f2355cbSLuis R. Rodriguez } 5643f2355cbSLuis R. Rodriguez 565fb1fc7adSLuis R. Rodriguez /* 566fb1fc7adSLuis R. Rodriguez * When dot11RegulatoryClassesRequired is supported 5673f2355cbSLuis R. Rodriguez * we can throw ext triplets as part of this soup, 5683f2355cbSLuis R. Rodriguez * for now we don't care when those change as we 569fb1fc7adSLuis R. Rodriguez * don't support them 570fb1fc7adSLuis R. Rodriguez */ 5713f2355cbSLuis R. Rodriguez *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | 5723f2355cbSLuis R. Rodriguez ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | 5733f2355cbSLuis R. Rodriguez ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); 5743f2355cbSLuis R. Rodriguez 5753f2355cbSLuis R. Rodriguez last_sub_max_channel = cur_sub_max_channel; 5763f2355cbSLuis R. Rodriguez 5773f2355cbSLuis R. Rodriguez country_ie += 3; 5783f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5793f2355cbSLuis R. Rodriguez num_rules++; 5803f2355cbSLuis R. Rodriguez 581fb1fc7adSLuis R. Rodriguez /* 582fb1fc7adSLuis R. Rodriguez * Note: this is not a IEEE requirement but 583fb1fc7adSLuis R. Rodriguez * simply a memory requirement 584fb1fc7adSLuis R. Rodriguez */ 5853f2355cbSLuis R. Rodriguez if (num_rules > NL80211_MAX_SUPP_REG_RULES) 5863f2355cbSLuis R. Rodriguez return NULL; 5873f2355cbSLuis R. Rodriguez } 5883f2355cbSLuis R. Rodriguez 5893f2355cbSLuis R. Rodriguez country_ie = triplets_start; 5903f2355cbSLuis R. Rodriguez country_ie_len = len_at_triplet; 5913f2355cbSLuis R. Rodriguez 5923f2355cbSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 5933f2355cbSLuis R. Rodriguez (num_rules * sizeof(struct ieee80211_reg_rule)); 5943f2355cbSLuis R. Rodriguez 5953f2355cbSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 5963f2355cbSLuis R. Rodriguez if (!rd) 5973f2355cbSLuis R. Rodriguez return NULL; 5983f2355cbSLuis R. Rodriguez 5993f2355cbSLuis R. Rodriguez rd->n_reg_rules = num_rules; 6003f2355cbSLuis R. Rodriguez rd->alpha2[0] = alpha2[0]; 6013f2355cbSLuis R. Rodriguez rd->alpha2[1] = alpha2[1]; 6023f2355cbSLuis R. Rodriguez 6033f2355cbSLuis R. Rodriguez /* This time around we fill in the rd */ 6043f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 60502e68a3dSLuis R. Rodriguez int end_channel = 0; 6063f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 6073f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 6083f2355cbSLuis R. Rodriguez struct ieee80211_reg_rule *reg_rule = NULL; 6093f2355cbSLuis R. Rodriguez struct ieee80211_freq_range *freq_range = NULL; 6103f2355cbSLuis R. Rodriguez struct ieee80211_power_rule *power_rule = NULL; 6113f2355cbSLuis R. Rodriguez 612fb1fc7adSLuis R. Rodriguez /* 613fb1fc7adSLuis R. Rodriguez * Must parse if dot11RegulatoryClassesRequired is true, 614fb1fc7adSLuis R. Rodriguez * we don't support this yet 615fb1fc7adSLuis R. Rodriguez */ 6163f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 6173f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 6183f2355cbSLuis R. Rodriguez country_ie += 3; 6193f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6203f2355cbSLuis R. Rodriguez continue; 6213f2355cbSLuis R. Rodriguez } 6223f2355cbSLuis R. Rodriguez 6233f2355cbSLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 6243f2355cbSLuis R. Rodriguez freq_range = ®_rule->freq_range; 6253f2355cbSLuis R. Rodriguez power_rule = ®_rule->power_rule; 6263f2355cbSLuis R. Rodriguez 6273f2355cbSLuis R. Rodriguez reg_rule->flags = flags; 6283f2355cbSLuis R. Rodriguez 62902e68a3dSLuis R. Rodriguez /* 2 GHz */ 63002e68a3dSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 63102e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 63202e68a3dSLuis R. Rodriguez triplet->chans.num_channels; 63302e68a3dSLuis R. Rodriguez else 63402e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 63502e68a3dSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 63602e68a3dSLuis R. Rodriguez 637fb1fc7adSLuis R. Rodriguez /* 638fb1fc7adSLuis R. Rodriguez * The +10 is since the regulatory domain expects 6393f2355cbSLuis R. Rodriguez * the actual band edge, not the center of freq for 6403f2355cbSLuis R. Rodriguez * its start and end freqs, assuming 20 MHz bandwidth on 641fb1fc7adSLuis R. Rodriguez * the channels passed 642fb1fc7adSLuis R. Rodriguez */ 6433f2355cbSLuis R. Rodriguez freq_range->start_freq_khz = 6443f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 6453f2355cbSLuis R. Rodriguez triplet->chans.first_channel) - 10); 6463f2355cbSLuis R. Rodriguez freq_range->end_freq_khz = 6473f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 64802e68a3dSLuis R. Rodriguez end_channel) + 10); 6493f2355cbSLuis R. Rodriguez 650fb1fc7adSLuis R. Rodriguez /* 651fb1fc7adSLuis R. Rodriguez * These are large arbitrary values we use to intersect later. 652fb1fc7adSLuis R. Rodriguez * Increment this if we ever support >= 40 MHz channels 653fb1fc7adSLuis R. Rodriguez * in IEEE 802.11 654fb1fc7adSLuis R. Rodriguez */ 6553f2355cbSLuis R. Rodriguez freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); 6563f2355cbSLuis R. Rodriguez power_rule->max_antenna_gain = DBI_TO_MBI(100); 6573f2355cbSLuis R. Rodriguez power_rule->max_eirp = DBM_TO_MBM(100); 6583f2355cbSLuis R. Rodriguez 6593f2355cbSLuis R. Rodriguez country_ie += 3; 6603f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6613f2355cbSLuis R. Rodriguez i++; 6623f2355cbSLuis R. Rodriguez 6633f2355cbSLuis R. Rodriguez BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); 6643f2355cbSLuis R. Rodriguez } 6653f2355cbSLuis R. Rodriguez 6663f2355cbSLuis R. Rodriguez return rd; 6673f2355cbSLuis R. Rodriguez } 6683f2355cbSLuis R. Rodriguez 6693f2355cbSLuis R. Rodriguez 670fb1fc7adSLuis R. Rodriguez /* 671fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 672fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 673fb1fc7adSLuis R. Rodriguez */ 6749c96477dSLuis R. Rodriguez static int reg_rules_intersect( 6759c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 6769c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 6779c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 6789c96477dSLuis R. Rodriguez { 6799c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 6809c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 6819c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 6829c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 6839c96477dSLuis R. Rodriguez u32 freq_diff; 6849c96477dSLuis R. Rodriguez 6859c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 6869c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 6879c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 6889c96477dSLuis R. Rodriguez 6899c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 6909c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 6919c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 6929c96477dSLuis R. Rodriguez 6939c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 6949c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 6959c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 6969c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 6979c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 6989c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 6999c96477dSLuis R. Rodriguez 7009c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 7019c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 7029c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 7039c96477dSLuis R. Rodriguez 7049c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 7059c96477dSLuis R. Rodriguez power_rule2->max_eirp); 7069c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 7079c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 7089c96477dSLuis R. Rodriguez 7099c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 7109c96477dSLuis R. Rodriguez 7119c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 7129c96477dSLuis R. Rodriguez return -EINVAL; 7139c96477dSLuis R. Rodriguez 7149c96477dSLuis R. Rodriguez return 0; 7159c96477dSLuis R. Rodriguez } 7169c96477dSLuis R. Rodriguez 7179c96477dSLuis R. Rodriguez /** 7189c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 7199c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 7209c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 7219c96477dSLuis R. Rodriguez * 7229c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 7239c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 7249c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 7259c96477dSLuis R. Rodriguez * 7269c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 7279c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 7289c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 7299c96477dSLuis R. Rodriguez */ 7309c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 7319c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 7329c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 7339c96477dSLuis R. Rodriguez { 7349c96477dSLuis R. Rodriguez int r, size_of_regd; 7359c96477dSLuis R. Rodriguez unsigned int x, y; 7369c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 7379c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 7389c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 7399c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 7409c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 7419c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 7429c96477dSLuis R. Rodriguez 7439c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 7449c96477dSLuis R. Rodriguez intersected_rule = &irule; 7459c96477dSLuis R. Rodriguez 7469c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 7479c96477dSLuis R. Rodriguez 7489c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 7499c96477dSLuis R. Rodriguez return NULL; 7509c96477dSLuis R. Rodriguez 751fb1fc7adSLuis R. Rodriguez /* 752fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 7539c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 7549c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 7559c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 756fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 757fb1fc7adSLuis R. Rodriguez */ 7589c96477dSLuis R. Rodriguez 7599c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7609c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7619c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7629c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 7639c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 7649c96477dSLuis R. Rodriguez intersected_rule)) 7659c96477dSLuis R. Rodriguez num_rules++; 7669c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 7679c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 7689c96477dSLuis R. Rodriguez } 7699c96477dSLuis R. Rodriguez } 7709c96477dSLuis R. Rodriguez 7719c96477dSLuis R. Rodriguez if (!num_rules) 7729c96477dSLuis R. Rodriguez return NULL; 7739c96477dSLuis R. Rodriguez 7749c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 7759c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 7769c96477dSLuis R. Rodriguez 7779c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 7789c96477dSLuis R. Rodriguez if (!rd) 7799c96477dSLuis R. Rodriguez return NULL; 7809c96477dSLuis R. Rodriguez 7819c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7829c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7839c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7849c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 785fb1fc7adSLuis R. Rodriguez /* 786fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 7879c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 788fb1fc7adSLuis R. Rodriguez * a memcpy() 789fb1fc7adSLuis R. Rodriguez */ 7909c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 7919c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 7929c96477dSLuis R. Rodriguez intersected_rule); 793fb1fc7adSLuis R. Rodriguez /* 794fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 795fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 796fb1fc7adSLuis R. Rodriguez */ 7979c96477dSLuis R. Rodriguez if (r) 7989c96477dSLuis R. Rodriguez continue; 7999c96477dSLuis R. Rodriguez rule_idx++; 8009c96477dSLuis R. Rodriguez } 8019c96477dSLuis R. Rodriguez } 8029c96477dSLuis R. Rodriguez 8039c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 8049c96477dSLuis R. Rodriguez kfree(rd); 8059c96477dSLuis R. Rodriguez return NULL; 8069c96477dSLuis R. Rodriguez } 8079c96477dSLuis R. Rodriguez 8089c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 8099c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 8109c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 8119c96477dSLuis R. Rodriguez 8129c96477dSLuis R. Rodriguez return rd; 8139c96477dSLuis R. Rodriguez } 8149c96477dSLuis R. Rodriguez 815fb1fc7adSLuis R. Rodriguez /* 816fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 817fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 818fb1fc7adSLuis R. Rodriguez */ 819b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 820b2e1b302SLuis R. Rodriguez { 821b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 822b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 823b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 824b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 825b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 826b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 827b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 828b2e1b302SLuis R. Rodriguez return channel_flags; 829b2e1b302SLuis R. Rodriguez } 830b2e1b302SLuis R. Rodriguez 8311fa25e41SLuis R. Rodriguez static int freq_reg_info_regd(struct wiphy *wiphy, 8321fa25e41SLuis R. Rodriguez u32 center_freq, 8331fa25e41SLuis R. Rodriguez u32 *bandwidth, 8341fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 8351fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *custom_regd) 8368318d78aSJohannes Berg { 8378318d78aSJohannes Berg int i; 8380c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 8393e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *regd; 840b2e1b302SLuis R. Rodriguez u32 max_bandwidth = 0; 8418318d78aSJohannes Berg 8421fa25e41SLuis R. Rodriguez regd = custom_regd ? custom_regd : cfg80211_regdomain; 8433e0c3ff3SLuis R. Rodriguez 844fb1fc7adSLuis R. Rodriguez /* 845fb1fc7adSLuis R. Rodriguez * Follow the driver's regulatory domain, if present, unless a country 846fb1fc7adSLuis R. Rodriguez * IE has been processed or a user wants to help complaince further 847fb1fc7adSLuis R. Rodriguez */ 8483e0c3ff3SLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE && 84924ed1da1SLuis R. Rodriguez last_request->initiator != REGDOM_SET_BY_USER && 8503e0c3ff3SLuis R. Rodriguez wiphy->regd) 8513e0c3ff3SLuis R. Rodriguez regd = wiphy->regd; 8523e0c3ff3SLuis R. Rodriguez 8533e0c3ff3SLuis R. Rodriguez if (!regd) 854b2e1b302SLuis R. Rodriguez return -EINVAL; 855b2e1b302SLuis R. Rodriguez 8563e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 857b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 858b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 859b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 860b2e1b302SLuis R. Rodriguez 8613e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 862b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 863b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 8640c7dc45dSLuis R. Rodriguez 865fb1fc7adSLuis R. Rodriguez /* 866fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 8670c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 868fb1fc7adSLuis R. Rodriguez * not overwrite it once found 869fb1fc7adSLuis R. Rodriguez */ 8700c7dc45dSLuis R. Rodriguez if (!band_rule_found) 8710c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 8720c7dc45dSLuis R. Rodriguez 873b2e1b302SLuis R. Rodriguez max_bandwidth = freq_max_bandwidth(fr, center_freq); 8740c7dc45dSLuis R. Rodriguez 875b2e1b302SLuis R. Rodriguez if (max_bandwidth && *bandwidth <= max_bandwidth) { 876b2e1b302SLuis R. Rodriguez *reg_rule = rr; 877b2e1b302SLuis R. Rodriguez *bandwidth = max_bandwidth; 8788318d78aSJohannes Berg break; 8798318d78aSJohannes Berg } 8808318d78aSJohannes Berg } 8818318d78aSJohannes Berg 8820c7dc45dSLuis R. Rodriguez if (!band_rule_found) 8830c7dc45dSLuis R. Rodriguez return -ERANGE; 8840c7dc45dSLuis R. Rodriguez 885b2e1b302SLuis R. Rodriguez return !max_bandwidth; 886b2e1b302SLuis R. Rodriguez } 88734f57347SLuis R. Rodriguez EXPORT_SYMBOL(freq_reg_info); 888b2e1b302SLuis R. Rodriguez 88934f57347SLuis R. Rodriguez int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth, 8901fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 8911fa25e41SLuis R. Rodriguez { 8921fa25e41SLuis R. Rodriguez return freq_reg_info_regd(wiphy, center_freq, 8931fa25e41SLuis R. Rodriguez bandwidth, reg_rule, NULL); 8941fa25e41SLuis R. Rodriguez } 895b2e1b302SLuis R. Rodriguez 896a92a3ce7SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, 897a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 898b2e1b302SLuis R. Rodriguez { 899b2e1b302SLuis R. Rodriguez int r; 900a92a3ce7SLuis R. Rodriguez u32 flags; 901b2e1b302SLuis R. Rodriguez u32 max_bandwidth = 0; 902b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 903b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 904a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 905a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 906fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 907a92a3ce7SLuis R. Rodriguez 908761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 909761cf7ecSLuis R. Rodriguez 910806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 911806a9e39SLuis R. Rodriguez 912a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 913a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 914a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 915a92a3ce7SLuis R. Rodriguez 916a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 917b2e1b302SLuis R. Rodriguez 9183e0c3ff3SLuis R. Rodriguez r = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq), 919b2e1b302SLuis R. Rodriguez &max_bandwidth, ®_rule); 920b2e1b302SLuis R. Rodriguez 921b2e1b302SLuis R. Rodriguez if (r) { 922fb1fc7adSLuis R. Rodriguez /* 923fb1fc7adSLuis R. Rodriguez * This means no regulatory rule was found in the country IE 9240c7dc45dSLuis R. Rodriguez * with a frequency range on the center_freq's band, since 9250c7dc45dSLuis R. Rodriguez * IEEE-802.11 allows for a country IE to have a subset of the 9260c7dc45dSLuis R. Rodriguez * regulatory information provided in a country we ignore 9270c7dc45dSLuis R. Rodriguez * disabling the channel unless at least one reg rule was 9280c7dc45dSLuis R. Rodriguez * found on the center_freq's band. For details see this 9290c7dc45dSLuis R. Rodriguez * clarification: 9300c7dc45dSLuis R. Rodriguez * 9310c7dc45dSLuis R. Rodriguez * http://tinyurl.com/11d-clarification 9320c7dc45dSLuis R. Rodriguez */ 9330c7dc45dSLuis R. Rodriguez if (r == -ERANGE && 9340c7dc45dSLuis R. Rodriguez last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { 9350c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 9360c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Leaving channel %d MHz " 9370c7dc45dSLuis R. Rodriguez "intact on %s - no rule found in band on " 9380c7dc45dSLuis R. Rodriguez "Country IE\n", 9390c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 9400c7dc45dSLuis R. Rodriguez #endif 9410c7dc45dSLuis R. Rodriguez } else { 942fb1fc7adSLuis R. Rodriguez /* 943fb1fc7adSLuis R. Rodriguez * In this case we know the country IE has at least one reg rule 944fb1fc7adSLuis R. Rodriguez * for the band so we respect its band definitions 945fb1fc7adSLuis R. Rodriguez */ 9460c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 9470c7dc45dSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) 9480c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Disabling " 9490c7dc45dSLuis R. Rodriguez "channel %d MHz on %s due to " 9500c7dc45dSLuis R. Rodriguez "Country IE\n", 9510c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 9520c7dc45dSLuis R. Rodriguez #endif 9538318d78aSJohannes Berg flags |= IEEE80211_CHAN_DISABLED; 9548318d78aSJohannes Berg chan->flags = flags; 9550c7dc45dSLuis R. Rodriguez } 9568318d78aSJohannes Berg return; 9578318d78aSJohannes Berg } 9588318d78aSJohannes Berg 959b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 960b2e1b302SLuis R. Rodriguez 961f976376dSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_DRIVER && 962806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 963806a9e39SLuis R. Rodriguez request_wiphy->strict_regulatory) { 964fb1fc7adSLuis R. Rodriguez /* 965fb1fc7adSLuis R. Rodriguez * This gaurantees the driver's requested regulatory domain 966f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 967fb1fc7adSLuis R. Rodriguez * settings 968fb1fc7adSLuis R. Rodriguez */ 969f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 970f976376dSLuis R. Rodriguez map_regdom_flags(reg_rule->flags); 971f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 972f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 973f976376dSLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); 974f976376dSLuis R. Rodriguez chan->max_power = chan->orig_mpwr = 975f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 976f976376dSLuis R. Rodriguez return; 977f976376dSLuis R. Rodriguez } 978f976376dSLuis R. Rodriguez 979b2e1b302SLuis R. Rodriguez chan->flags = flags | map_regdom_flags(reg_rule->flags); 9808318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 981b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 982b2e1b302SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); 983253898c4SJohn W. Linville if (chan->orig_mpwr) 984b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 985b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 986253898c4SJohn W. Linville else 987b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 9888318d78aSJohannes Berg } 9898318d78aSJohannes Berg 990a92a3ce7SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) 9918318d78aSJohannes Berg { 992a92a3ce7SLuis R. Rodriguez unsigned int i; 993a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 994a92a3ce7SLuis R. Rodriguez 995a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 996a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 9978318d78aSJohannes Berg 9988318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 999a92a3ce7SLuis R. Rodriguez handle_channel(wiphy, band, i); 10008318d78aSJohannes Berg } 10018318d78aSJohannes Berg 100214b9815aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, enum reg_set_by setby) 100314b9815aSLuis R. Rodriguez { 100414b9815aSLuis R. Rodriguez if (!last_request) 100514b9815aSLuis R. Rodriguez return true; 100614b9815aSLuis R. Rodriguez if (setby == REGDOM_SET_BY_CORE && 10072a44f911SLuis R. Rodriguez wiphy->custom_regulatory) 100814b9815aSLuis R. Rodriguez return true; 1009fb1fc7adSLuis R. Rodriguez /* 1010fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1011fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1012fb1fc7adSLuis R. Rodriguez */ 1013f976376dSLuis R. Rodriguez if (wiphy->strict_regulatory && !wiphy->regd && 1014f976376dSLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) 101514b9815aSLuis R. Rodriguez return true; 101614b9815aSLuis R. Rodriguez return false; 101714b9815aSLuis R. Rodriguez } 101814b9815aSLuis R. Rodriguez 1019b2e1b302SLuis R. Rodriguez static void update_all_wiphy_regulatory(enum reg_set_by setby) 1020b2e1b302SLuis R. Rodriguez { 1021b2e1b302SLuis R. Rodriguez struct cfg80211_registered_device *drv; 1022b2e1b302SLuis R. Rodriguez 1023b2e1b302SLuis R. Rodriguez list_for_each_entry(drv, &cfg80211_drv_list, list) 1024b2e1b302SLuis R. Rodriguez wiphy_update_regulatory(&drv->wiphy, setby); 1025b2e1b302SLuis R. Rodriguez } 1026b2e1b302SLuis R. Rodriguez 1027e38f8a7aSLuis R. Rodriguez static void handle_reg_beacon(struct wiphy *wiphy, 1028e38f8a7aSLuis R. Rodriguez unsigned int chan_idx, 1029e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1030e38f8a7aSLuis R. Rodriguez { 1031e38f8a7aSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 1032e38f8a7aSLuis R. Rodriguez #define REG_DEBUG_BEACON_FLAG(desc) \ 1033e38f8a7aSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Enabling " desc " on " \ 1034e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", \ 1035e38f8a7aSLuis R. Rodriguez reg_beacon->chan.center_freq, \ 1036e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(reg_beacon->chan.center_freq), \ 1037e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 1038e38f8a7aSLuis R. Rodriguez #else 1039e38f8a7aSLuis R. Rodriguez #define REG_DEBUG_BEACON_FLAG(desc) do {} while (0) 1040e38f8a7aSLuis R. Rodriguez #endif 1041e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1042e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 1043e38f8a7aSLuis R. Rodriguez 1044e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1045e38f8a7aSLuis R. Rodriguez 1046e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1047e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1048e38f8a7aSLuis R. Rodriguez 1049e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1050e38f8a7aSLuis R. Rodriguez return; 1051e38f8a7aSLuis R. Rodriguez 1052e38f8a7aSLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { 1053e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 1054e38f8a7aSLuis R. Rodriguez REG_DEBUG_BEACON_FLAG("active scanning"); 1055e38f8a7aSLuis R. Rodriguez } 1056e38f8a7aSLuis R. Rodriguez 1057e38f8a7aSLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IBSS) { 1058e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 1059e38f8a7aSLuis R. Rodriguez REG_DEBUG_BEACON_FLAG("beaconing"); 1060e38f8a7aSLuis R. Rodriguez } 1061e38f8a7aSLuis R. Rodriguez 1062e38f8a7aSLuis R. Rodriguez chan->beacon_found = true; 1063e38f8a7aSLuis R. Rodriguez #undef REG_DEBUG_BEACON_FLAG 1064e38f8a7aSLuis R. Rodriguez } 1065e38f8a7aSLuis R. Rodriguez 1066e38f8a7aSLuis R. Rodriguez /* 1067e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1068e38f8a7aSLuis R. Rodriguez * new channel 1069e38f8a7aSLuis R. Rodriguez */ 1070e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1071e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1072e38f8a7aSLuis R. Rodriguez { 1073e38f8a7aSLuis R. Rodriguez unsigned int i; 1074e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1075e38f8a7aSLuis R. Rodriguez 1076e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1077e38f8a7aSLuis R. Rodriguez 1078e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1079e38f8a7aSLuis R. Rodriguez return; 1080e38f8a7aSLuis R. Rodriguez 1081e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1082e38f8a7aSLuis R. Rodriguez 1083e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1084e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1085e38f8a7aSLuis R. Rodriguez } 1086e38f8a7aSLuis R. Rodriguez 1087e38f8a7aSLuis R. Rodriguez /* 1088e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1089e38f8a7aSLuis R. Rodriguez */ 1090e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1091e38f8a7aSLuis R. Rodriguez { 1092e38f8a7aSLuis R. Rodriguez unsigned int i; 1093e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1094e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1095e38f8a7aSLuis R. Rodriguez 1096e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1097e38f8a7aSLuis R. Rodriguez 1098e38f8a7aSLuis R. Rodriguez if (list_empty(®_beacon_list)) 1099e38f8a7aSLuis R. Rodriguez return; 1100e38f8a7aSLuis R. Rodriguez 1101e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1102e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1103e38f8a7aSLuis R. Rodriguez continue; 1104e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1105e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1106e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1107e38f8a7aSLuis R. Rodriguez } 1108e38f8a7aSLuis R. Rodriguez } 1109e38f8a7aSLuis R. Rodriguez 1110e38f8a7aSLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 1111e38f8a7aSLuis R. Rodriguez { 1112e38f8a7aSLuis R. Rodriguez if (is_world_regdom(cfg80211_regdomain->alpha2) || 1113e38f8a7aSLuis R. Rodriguez (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) 1114e38f8a7aSLuis R. Rodriguez return true; 1115e38f8a7aSLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE && 1116e38f8a7aSLuis R. Rodriguez wiphy->custom_regulatory) 1117e38f8a7aSLuis R. Rodriguez return true; 1118e38f8a7aSLuis R. Rodriguez return false; 1119e38f8a7aSLuis R. Rodriguez } 1120e38f8a7aSLuis R. Rodriguez 1121e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1122e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1123e38f8a7aSLuis R. Rodriguez { 1124e38f8a7aSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 1125e38f8a7aSLuis R. Rodriguez return; 1126e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1127e38f8a7aSLuis R. Rodriguez } 1128e38f8a7aSLuis R. Rodriguez 1129b2e1b302SLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby) 11308318d78aSJohannes Berg { 11318318d78aSJohannes Berg enum ieee80211_band band; 1132d46e5b1dSLuis R. Rodriguez 1133d46e5b1dSLuis R. Rodriguez if (ignore_reg_update(wiphy, setby)) 1134e38f8a7aSLuis R. Rodriguez goto out; 1135b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 11368318d78aSJohannes Berg if (wiphy->bands[band]) 1137a92a3ce7SLuis R. Rodriguez handle_band(wiphy, band); 1138b2e1b302SLuis R. Rodriguez } 1139e38f8a7aSLuis R. Rodriguez out: 1140e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1141b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1142716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 1143b2e1b302SLuis R. Rodriguez } 1144b2e1b302SLuis R. Rodriguez 11451fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 11461fa25e41SLuis R. Rodriguez enum ieee80211_band band, 11471fa25e41SLuis R. Rodriguez unsigned int chan_idx, 11481fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 11491fa25e41SLuis R. Rodriguez { 11501fa25e41SLuis R. Rodriguez int r; 11511fa25e41SLuis R. Rodriguez u32 max_bandwidth = 0; 11521fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 11531fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 11541fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 11551fa25e41SLuis R. Rodriguez struct ieee80211_channel *chan; 11561fa25e41SLuis R. Rodriguez 11571fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 11581fa25e41SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 11591fa25e41SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 11601fa25e41SLuis R. Rodriguez 11611fa25e41SLuis R. Rodriguez r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), 11621fa25e41SLuis R. Rodriguez &max_bandwidth, ®_rule, regd); 11631fa25e41SLuis R. Rodriguez 11641fa25e41SLuis R. Rodriguez if (r) { 11651fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 11661fa25e41SLuis R. Rodriguez return; 11671fa25e41SLuis R. Rodriguez } 11681fa25e41SLuis R. Rodriguez 11691fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 11701fa25e41SLuis R. Rodriguez 11711fa25e41SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags); 11721fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 11731fa25e41SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); 11741fa25e41SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 11751fa25e41SLuis R. Rodriguez } 11761fa25e41SLuis R. Rodriguez 11771fa25e41SLuis R. Rodriguez static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, 11781fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 11791fa25e41SLuis R. Rodriguez { 11801fa25e41SLuis R. Rodriguez unsigned int i; 11811fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 11821fa25e41SLuis R. Rodriguez 11831fa25e41SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 11841fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 11851fa25e41SLuis R. Rodriguez 11861fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 11871fa25e41SLuis R. Rodriguez handle_channel_custom(wiphy, band, i, regd); 11881fa25e41SLuis R. Rodriguez } 11891fa25e41SLuis R. Rodriguez 11901fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 11911fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 11921fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 11931fa25e41SLuis R. Rodriguez { 11941fa25e41SLuis R. Rodriguez enum ieee80211_band band; 11951fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 11961fa25e41SLuis R. Rodriguez if (wiphy->bands[band]) 11971fa25e41SLuis R. Rodriguez handle_band_custom(wiphy, band, regd); 11981fa25e41SLuis R. Rodriguez } 11991fa25e41SLuis R. Rodriguez } 12001fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 12011fa25e41SLuis R. Rodriguez 12023e0c3ff3SLuis R. Rodriguez static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, 12033e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *src_regd) 12043e0c3ff3SLuis R. Rodriguez { 12053e0c3ff3SLuis R. Rodriguez struct ieee80211_regdomain *regd; 12063e0c3ff3SLuis R. Rodriguez int size_of_regd = 0; 12073e0c3ff3SLuis R. Rodriguez unsigned int i; 12083e0c3ff3SLuis R. Rodriguez 12093e0c3ff3SLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 12103e0c3ff3SLuis R. Rodriguez ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); 12113e0c3ff3SLuis R. Rodriguez 12123e0c3ff3SLuis R. Rodriguez regd = kzalloc(size_of_regd, GFP_KERNEL); 12133e0c3ff3SLuis R. Rodriguez if (!regd) 12143e0c3ff3SLuis R. Rodriguez return -ENOMEM; 12153e0c3ff3SLuis R. Rodriguez 12163e0c3ff3SLuis R. Rodriguez memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 12173e0c3ff3SLuis R. Rodriguez 12183e0c3ff3SLuis R. Rodriguez for (i = 0; i < src_regd->n_reg_rules; i++) 12193e0c3ff3SLuis R. Rodriguez memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 12203e0c3ff3SLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 12213e0c3ff3SLuis R. Rodriguez 12223e0c3ff3SLuis R. Rodriguez *dst_regd = regd; 12233e0c3ff3SLuis R. Rodriguez return 0; 1224b2e1b302SLuis R. Rodriguez } 1225b2e1b302SLuis R. Rodriguez 1226fb1fc7adSLuis R. Rodriguez /* 1227fb1fc7adSLuis R. Rodriguez * Return value which can be used by ignore_request() to indicate 1228fb1fc7adSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains 1229fb1fc7adSLuis R. Rodriguez */ 12309c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 12319c96477dSLuis R. Rodriguez 123284fa4f43SJohannes Berg /* This has the logic which determines when a new request 123384fa4f43SJohannes Berg * should be ignored. */ 123484fa4f43SJohannes Berg static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by, 123584fa4f43SJohannes Berg const char *alpha2) 123684fa4f43SJohannes Berg { 1237806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1238761cf7ecSLuis R. Rodriguez 1239761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1240761cf7ecSLuis R. Rodriguez 124184fa4f43SJohannes Berg /* All initial requests are respected */ 124284fa4f43SJohannes Berg if (!last_request) 124384fa4f43SJohannes Berg return 0; 124484fa4f43SJohannes Berg 124584fa4f43SJohannes Berg switch (set_by) { 124684fa4f43SJohannes Berg case REGDOM_SET_BY_INIT: 124784fa4f43SJohannes Berg return -EINVAL; 124884fa4f43SJohannes Berg case REGDOM_SET_BY_CORE: 1249ba25c141SLuis R. Rodriguez return -EINVAL; 125084fa4f43SJohannes Berg case REGDOM_SET_BY_COUNTRY_IE: 1251806a9e39SLuis R. Rodriguez 1252806a9e39SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1253806a9e39SLuis R. Rodriguez 125484fa4f43SJohannes Berg if (unlikely(!is_an_alpha2(alpha2))) 125584fa4f43SJohannes Berg return -EINVAL; 125684fa4f43SJohannes Berg if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { 1257806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 125884fa4f43SJohannes Berg /* 125984fa4f43SJohannes Berg * Two cards with two APs claiming different 126084fa4f43SJohannes Berg * different Country IE alpha2s. We could 126184fa4f43SJohannes Berg * intersect them, but that seems unlikely 126284fa4f43SJohannes Berg * to be correct. Reject second one for now. 126384fa4f43SJohannes Berg */ 126469b1572bSLuis R. Rodriguez if (regdom_changes(alpha2)) 126584fa4f43SJohannes Berg return -EOPNOTSUPP; 126684fa4f43SJohannes Berg return -EALREADY; 126784fa4f43SJohannes Berg } 1268fb1fc7adSLuis R. Rodriguez /* 1269fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1270fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1271fb1fc7adSLuis R. Rodriguez */ 127269b1572bSLuis R. Rodriguez if (WARN_ON(regdom_changes(alpha2))) 127384fa4f43SJohannes Berg return 0; 127484fa4f43SJohannes Berg return -EALREADY; 127584fa4f43SJohannes Berg } 12763f2355cbSLuis R. Rodriguez return REG_INTERSECT; 127784fa4f43SJohannes Berg case REGDOM_SET_BY_DRIVER: 1278e74b1e7fSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_CORE) { 1279e74b1e7fSLuis R. Rodriguez if (is_old_static_regdom(cfg80211_regdomain)) 128084fa4f43SJohannes Berg return 0; 128169b1572bSLuis R. Rodriguez if (regdom_changes(alpha2)) 1282e74b1e7fSLuis R. Rodriguez return 0; 1283e74b1e7fSLuis R. Rodriguez return -EALREADY; 1284e74b1e7fSLuis R. Rodriguez } 1285fff32c04SLuis R. Rodriguez 1286fff32c04SLuis R. Rodriguez /* 1287fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1288fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1289fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1290fff32c04SLuis R. Rodriguez */ 1291fff32c04SLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_DRIVER && 129269b1572bSLuis R. Rodriguez !regdom_changes(alpha2)) 1293fff32c04SLuis R. Rodriguez return -EALREADY; 1294fff32c04SLuis R. Rodriguez 12953e0c3ff3SLuis R. Rodriguez return REG_INTERSECT; 129684fa4f43SJohannes Berg case REGDOM_SET_BY_USER: 129784fa4f43SJohannes Berg if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) 12989c96477dSLuis R. Rodriguez return REG_INTERSECT; 1299fb1fc7adSLuis R. Rodriguez /* 1300fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1301fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1302fb1fc7adSLuis R. Rodriguez */ 13033f2355cbSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_USER && 13043f2355cbSLuis R. Rodriguez last_request->intersect) 13053f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 1306fb1fc7adSLuis R. Rodriguez /* 1307fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1308fb1fc7adSLuis R. Rodriguez * requests have been processed 1309fb1fc7adSLuis R. Rodriguez */ 13105eebade6SLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_CORE || 13115eebade6SLuis R. Rodriguez last_request->initiator == REGDOM_SET_BY_DRIVER || 13125eebade6SLuis R. Rodriguez last_request->initiator == REGDOM_SET_BY_USER) { 131369b1572bSLuis R. Rodriguez if (regdom_changes(last_request->alpha2)) 13145eebade6SLuis R. Rodriguez return -EAGAIN; 13155eebade6SLuis R. Rodriguez } 13165eebade6SLuis R. Rodriguez 1317e74b1e7fSLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 131869b1572bSLuis R. Rodriguez !regdom_changes(alpha2)) 1319e74b1e7fSLuis R. Rodriguez return -EALREADY; 1320e74b1e7fSLuis R. Rodriguez 132184fa4f43SJohannes Berg return 0; 132284fa4f43SJohannes Berg } 132384fa4f43SJohannes Berg 132484fa4f43SJohannes Berg return -EINVAL; 132584fa4f43SJohannes Berg } 132684fa4f43SJohannes Berg 1327d1c96a9aSLuis R. Rodriguez /** 1328d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1329d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1330d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 133128da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1332d1c96a9aSLuis R. Rodriguez * 1333d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 133428da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1335d1c96a9aSLuis R. Rodriguez * 1336d1c96a9aSLuis R. Rodriguez * Returns zero if all went fine, %-EALREADY if a regulatory domain had 1337d1c96a9aSLuis R. Rodriguez * already been set or other standard error codes. 1338d1c96a9aSLuis R. Rodriguez * 1339d1c96a9aSLuis R. Rodriguez * Caller must hold &cfg80211_mutex 1340d1c96a9aSLuis R. Rodriguez */ 134128da32d7SLuis R. Rodriguez static int __regulatory_hint(struct wiphy *wiphy, 134228da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1343b2e1b302SLuis R. Rodriguez { 13449c96477dSLuis R. Rodriguez bool intersect = false; 1345b2e1b302SLuis R. Rodriguez int r = 0; 1346b2e1b302SLuis R. Rodriguez 1347761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1348761cf7ecSLuis R. Rodriguez 134928da32d7SLuis R. Rodriguez r = ignore_request(wiphy, 135028da32d7SLuis R. Rodriguez pending_request->initiator, 135128da32d7SLuis R. Rodriguez pending_request->alpha2); 13529c96477dSLuis R. Rodriguez 13533e0c3ff3SLuis R. Rodriguez if (r == REG_INTERSECT) { 135428da32d7SLuis R. Rodriguez if (pending_request->initiator == REGDOM_SET_BY_DRIVER) { 13553e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1356d951c1ddSLuis R. Rodriguez if (r) { 1357d951c1ddSLuis R. Rodriguez kfree(pending_request); 1358b2e1b302SLuis R. Rodriguez return r; 13593e0c3ff3SLuis R. Rodriguez } 1360d951c1ddSLuis R. Rodriguez } 13613e0c3ff3SLuis R. Rodriguez intersect = true; 13623e0c3ff3SLuis R. Rodriguez } else if (r) { 1363fb1fc7adSLuis R. Rodriguez /* 1364fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 13653e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1366fb1fc7adSLuis R. Rodriguez * wiphy 1367fb1fc7adSLuis R. Rodriguez */ 136828da32d7SLuis R. Rodriguez if (r == -EALREADY && 136928da32d7SLuis R. Rodriguez pending_request->initiator == REGDOM_SET_BY_DRIVER) { 13703e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1371d951c1ddSLuis R. Rodriguez if (r) { 1372d951c1ddSLuis R. Rodriguez kfree(pending_request); 13733e0c3ff3SLuis R. Rodriguez return r; 1374d951c1ddSLuis R. Rodriguez } 13753e0c3ff3SLuis R. Rodriguez r = -EALREADY; 13763e0c3ff3SLuis R. Rodriguez goto new_request; 13773e0c3ff3SLuis R. Rodriguez } 1378d951c1ddSLuis R. Rodriguez kfree(pending_request); 13793e0c3ff3SLuis R. Rodriguez return r; 13803e0c3ff3SLuis R. Rodriguez } 1381b2e1b302SLuis R. Rodriguez 13823e0c3ff3SLuis R. Rodriguez new_request: 1383f6037d09SJohannes Berg kfree(last_request); 1384d951c1ddSLuis R. Rodriguez 1385d951c1ddSLuis R. Rodriguez last_request = pending_request; 1386d951c1ddSLuis R. Rodriguez last_request->intersect = intersect; 1387d951c1ddSLuis R. Rodriguez 1388d951c1ddSLuis R. Rodriguez pending_request = NULL; 13893e0c3ff3SLuis R. Rodriguez 13903e0c3ff3SLuis R. Rodriguez /* When r == REG_INTERSECT we do need to call CRDA */ 13913e0c3ff3SLuis R. Rodriguez if (r < 0) 13923e0c3ff3SLuis R. Rodriguez return r; 13933e0c3ff3SLuis R. Rodriguez 13943f2355cbSLuis R. Rodriguez /* 13953f2355cbSLuis R. Rodriguez * Note: When CONFIG_WIRELESS_OLD_REGULATORY is enabled 13963f2355cbSLuis R. Rodriguez * AND if CRDA is NOT present nothing will happen, if someone 13973f2355cbSLuis R. Rodriguez * wants to bother with 11d with OLD_REG you can add a timer. 13983f2355cbSLuis R. Rodriguez * If after x amount of time nothing happens you can call: 13993f2355cbSLuis R. Rodriguez * 14003f2355cbSLuis R. Rodriguez * return set_regdom(country_ie_regdomain); 14013f2355cbSLuis R. Rodriguez * 14023f2355cbSLuis R. Rodriguez * to intersect with the static rd 14033f2355cbSLuis R. Rodriguez */ 1404d951c1ddSLuis R. Rodriguez return call_crda(last_request->alpha2); 1405b2e1b302SLuis R. Rodriguez } 1406b2e1b302SLuis R. Rodriguez 1407fe33eb39SLuis R. Rodriguez /* This currently only processes user and driver regulatory hints */ 1408d951c1ddSLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 1409fe33eb39SLuis R. Rodriguez { 1410fe33eb39SLuis R. Rodriguez int r = 0; 1411fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1412fe33eb39SLuis R. Rodriguez 1413fe33eb39SLuis R. Rodriguez BUG_ON(!reg_request->alpha2); 1414fe33eb39SLuis R. Rodriguez 1415fe33eb39SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1416fe33eb39SLuis R. Rodriguez 1417fe33eb39SLuis R. Rodriguez if (wiphy_idx_valid(reg_request->wiphy_idx)) 1418fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1419fe33eb39SLuis R. Rodriguez 1420fe33eb39SLuis R. Rodriguez if (reg_request->initiator == REGDOM_SET_BY_DRIVER && 1421fe33eb39SLuis R. Rodriguez !wiphy) { 1422d951c1ddSLuis R. Rodriguez kfree(reg_request); 1423fe33eb39SLuis R. Rodriguez goto out; 1424fe33eb39SLuis R. Rodriguez } 1425fe33eb39SLuis R. Rodriguez 142628da32d7SLuis R. Rodriguez r = __regulatory_hint(wiphy, reg_request); 1427fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 1428fe33eb39SLuis R. Rodriguez if (r == -EALREADY && wiphy && wiphy->strict_regulatory) 1429fe33eb39SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 1430fe33eb39SLuis R. Rodriguez out: 1431fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1432fe33eb39SLuis R. Rodriguez } 1433fe33eb39SLuis R. Rodriguez 1434e38f8a7aSLuis R. Rodriguez /* Processes regulatory hints, this is all the REGDOM_SET_BY_* */ 1435fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1436fe33eb39SLuis R. Rodriguez { 1437fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request; 1438fe33eb39SLuis R. Rodriguez 1439fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1440fe33eb39SLuis R. Rodriguez while (!list_empty(®_requests_list)) { 1441fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1442fe33eb39SLuis R. Rodriguez struct regulatory_request, 1443fe33eb39SLuis R. Rodriguez list); 1444fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1445fe33eb39SLuis R. Rodriguez 1446d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1447d951c1ddSLuis R. Rodriguez reg_process_hint(reg_request); 1448fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1449fe33eb39SLuis R. Rodriguez } 1450fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1451fe33eb39SLuis R. Rodriguez } 1452fe33eb39SLuis R. Rodriguez 1453e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1454e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1455e38f8a7aSLuis R. Rodriguez { 1456e38f8a7aSLuis R. Rodriguez struct cfg80211_registered_device *drv; 1457e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1458e38f8a7aSLuis R. Rodriguez 1459e38f8a7aSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1460e38f8a7aSLuis R. Rodriguez 1461e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1462e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1463e38f8a7aSLuis R. Rodriguez 1464e38f8a7aSLuis R. Rodriguez if (list_empty(®_pending_beacons)) { 1465e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1466e38f8a7aSLuis R. Rodriguez goto out; 1467e38f8a7aSLuis R. Rodriguez } 1468e38f8a7aSLuis R. Rodriguez 1469e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1470e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1471e38f8a7aSLuis R. Rodriguez 1472e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1473e38f8a7aSLuis R. Rodriguez 1474e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 1475e38f8a7aSLuis R. Rodriguez list_for_each_entry(drv, &cfg80211_drv_list, list) 1476e38f8a7aSLuis R. Rodriguez wiphy_update_new_beacon(&drv->wiphy, pending_beacon); 1477e38f8a7aSLuis R. Rodriguez 1478e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1479e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1480e38f8a7aSLuis R. Rodriguez } 1481e38f8a7aSLuis R. Rodriguez 1482e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1483e38f8a7aSLuis R. Rodriguez out: 1484e38f8a7aSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1485e38f8a7aSLuis R. Rodriguez } 1486e38f8a7aSLuis R. Rodriguez 1487fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1488fe33eb39SLuis R. Rodriguez { 1489fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1490e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 1491fe33eb39SLuis R. Rodriguez } 1492fe33eb39SLuis R. Rodriguez 1493fe33eb39SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 1494fe33eb39SLuis R. Rodriguez 1495fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1496fe33eb39SLuis R. Rodriguez { 1497fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1498fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1499fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1500fe33eb39SLuis R. Rodriguez 1501fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1502fe33eb39SLuis R. Rodriguez } 1503fe33eb39SLuis R. Rodriguez 1504fe33eb39SLuis R. Rodriguez /* Core regulatory hint -- happens once during cfg80211_init() */ 1505ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1506ba25c141SLuis R. Rodriguez { 1507ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1508ba25c141SLuis R. Rodriguez 1509ba25c141SLuis R. Rodriguez BUG_ON(last_request); 1510ba25c141SLuis R. Rodriguez 1511ba25c141SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1512ba25c141SLuis R. Rodriguez GFP_KERNEL); 1513ba25c141SLuis R. Rodriguez if (!request) 1514ba25c141SLuis R. Rodriguez return -ENOMEM; 1515ba25c141SLuis R. Rodriguez 1516ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1517ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1518ba25c141SLuis R. Rodriguez request->initiator = REGDOM_SET_BY_CORE; 1519ba25c141SLuis R. Rodriguez 1520fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1521ba25c141SLuis R. Rodriguez 1522fe33eb39SLuis R. Rodriguez return 0; 1523ba25c141SLuis R. Rodriguez } 1524ba25c141SLuis R. Rodriguez 1525fe33eb39SLuis R. Rodriguez /* User hints */ 1526fe33eb39SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2) 1527b2e1b302SLuis R. Rodriguez { 1528fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1529fe33eb39SLuis R. Rodriguez 1530be3d4810SJohannes Berg BUG_ON(!alpha2); 1531b2e1b302SLuis R. Rodriguez 1532fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1533fe33eb39SLuis R. Rodriguez if (!request) 1534fe33eb39SLuis R. Rodriguez return -ENOMEM; 1535fe33eb39SLuis R. Rodriguez 1536fe33eb39SLuis R. Rodriguez request->wiphy_idx = WIPHY_IDX_STALE; 1537fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1538fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1539fe33eb39SLuis R. Rodriguez request->initiator = REGDOM_SET_BY_USER, 1540fe33eb39SLuis R. Rodriguez 1541fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1542fe33eb39SLuis R. Rodriguez 1543fe33eb39SLuis R. Rodriguez return 0; 1544fe33eb39SLuis R. Rodriguez } 1545fe33eb39SLuis R. Rodriguez 1546fe33eb39SLuis R. Rodriguez /* Driver hints */ 1547fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1548fe33eb39SLuis R. Rodriguez { 1549fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1550fe33eb39SLuis R. Rodriguez 1551fe33eb39SLuis R. Rodriguez BUG_ON(!alpha2); 1552fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy); 1553fe33eb39SLuis R. Rodriguez 1554fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1555fe33eb39SLuis R. Rodriguez if (!request) 1556fe33eb39SLuis R. Rodriguez return -ENOMEM; 1557fe33eb39SLuis R. Rodriguez 1558fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1559fe33eb39SLuis R. Rodriguez 1560fe33eb39SLuis R. Rodriguez /* Must have registered wiphy first */ 1561fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); 1562fe33eb39SLuis R. Rodriguez 1563fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1564fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1565fe33eb39SLuis R. Rodriguez request->initiator = REGDOM_SET_BY_DRIVER; 1566fe33eb39SLuis R. Rodriguez 1567fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1568fe33eb39SLuis R. Rodriguez 1569fe33eb39SLuis R. Rodriguez return 0; 1570b2e1b302SLuis R. Rodriguez } 1571b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1572b2e1b302SLuis R. Rodriguez 15733f2355cbSLuis R. Rodriguez static bool reg_same_country_ie_hint(struct wiphy *wiphy, 15743f2355cbSLuis R. Rodriguez u32 country_ie_checksum) 15753f2355cbSLuis R. Rodriguez { 1576806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1577806a9e39SLuis R. Rodriguez 1578761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1579761cf7ecSLuis R. Rodriguez 1580806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1581806a9e39SLuis R. Rodriguez 1582806a9e39SLuis R. Rodriguez if (!request_wiphy) 15833f2355cbSLuis R. Rodriguez return false; 1584806a9e39SLuis R. Rodriguez 1585806a9e39SLuis R. Rodriguez if (likely(request_wiphy != wiphy)) 15863f2355cbSLuis R. Rodriguez return !country_ie_integrity_changes(country_ie_checksum); 1587fb1fc7adSLuis R. Rodriguez /* 1588fb1fc7adSLuis R. Rodriguez * We should not have let these through at this point, they 15893f2355cbSLuis R. Rodriguez * should have been picked up earlier by the first alpha2 check 1590fb1fc7adSLuis R. Rodriguez * on the device 1591fb1fc7adSLuis R. Rodriguez */ 15923f2355cbSLuis R. Rodriguez if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) 15933f2355cbSLuis R. Rodriguez return true; 15943f2355cbSLuis R. Rodriguez return false; 15953f2355cbSLuis R. Rodriguez } 15963f2355cbSLuis R. Rodriguez 15973f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 15983f2355cbSLuis R. Rodriguez u8 *country_ie, 15993f2355cbSLuis R. Rodriguez u8 country_ie_len) 16003f2355cbSLuis R. Rodriguez { 16013f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 16023f2355cbSLuis R. Rodriguez char alpha2[2]; 16033f2355cbSLuis R. Rodriguez u32 checksum = 0; 16043f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 1605fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 16063f2355cbSLuis R. Rodriguez 1607a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 16083f2355cbSLuis R. Rodriguez 1609d335fe63SLuis R. Rodriguez if (unlikely(!last_request)) { 1610d335fe63SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1611d335fe63SLuis R. Rodriguez return; 1612d335fe63SLuis R. Rodriguez } 1613d335fe63SLuis R. Rodriguez 16143f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 16153f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 16163f2355cbSLuis R. Rodriguez goto out; 16173f2355cbSLuis R. Rodriguez 16183f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 16193f2355cbSLuis R. Rodriguez goto out; 16203f2355cbSLuis R. Rodriguez 1621fb1fc7adSLuis R. Rodriguez /* 1622fb1fc7adSLuis R. Rodriguez * Pending country IE processing, this can happen after we 16233f2355cbSLuis R. Rodriguez * call CRDA and wait for a response if a beacon was received before 1624fb1fc7adSLuis R. Rodriguez * we were able to process the last regulatory_hint_11d() call 1625fb1fc7adSLuis R. Rodriguez */ 16263f2355cbSLuis R. Rodriguez if (country_ie_regdomain) 16273f2355cbSLuis R. Rodriguez goto out; 16283f2355cbSLuis R. Rodriguez 16293f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 16303f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 16313f2355cbSLuis R. Rodriguez 16323f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 16333f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 16343f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 16353f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 16363f2355cbSLuis R. Rodriguez 1637fb1fc7adSLuis R. Rodriguez /* 1638fb1fc7adSLuis R. Rodriguez * We will run this for *every* beacon processed for the BSSID, so 16393f2355cbSLuis R. Rodriguez * we optimize an early check to exit out early if we don't have to 1640fb1fc7adSLuis R. Rodriguez * do anything 1641fb1fc7adSLuis R. Rodriguez */ 1642806a9e39SLuis R. Rodriguez if (likely(wiphy_idx_valid(last_request->wiphy_idx))) { 16433f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv_last_ie; 16443f2355cbSLuis R. Rodriguez 1645806a9e39SLuis R. Rodriguez drv_last_ie = 1646806a9e39SLuis R. Rodriguez cfg80211_drv_by_wiphy_idx(last_request->wiphy_idx); 16473f2355cbSLuis R. Rodriguez 1648fb1fc7adSLuis R. Rodriguez /* 1649fb1fc7adSLuis R. Rodriguez * Lets keep this simple -- we trust the first AP 1650fb1fc7adSLuis R. Rodriguez * after we intersect with CRDA 1651fb1fc7adSLuis R. Rodriguez */ 1652806a9e39SLuis R. Rodriguez if (likely(&drv_last_ie->wiphy == wiphy)) { 1653fb1fc7adSLuis R. Rodriguez /* 1654fb1fc7adSLuis R. Rodriguez * Ignore IEs coming in on this wiphy with 1655fb1fc7adSLuis R. Rodriguez * the same alpha2 and environment cap 1656fb1fc7adSLuis R. Rodriguez */ 16573f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 16583f2355cbSLuis R. Rodriguez alpha2) && 16593f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 16603f2355cbSLuis R. Rodriguez goto out; 16613f2355cbSLuis R. Rodriguez } 1662fb1fc7adSLuis R. Rodriguez /* 1663fb1fc7adSLuis R. Rodriguez * the wiphy moved on to another BSSID or the AP 16643f2355cbSLuis R. Rodriguez * was reconfigured. XXX: We need to deal with the 16653f2355cbSLuis R. Rodriguez * case where the user suspends and goes to goes 16663f2355cbSLuis R. Rodriguez * to another country, and then gets IEs from an 1667fb1fc7adSLuis R. Rodriguez * AP with different settings 1668fb1fc7adSLuis R. Rodriguez */ 16693f2355cbSLuis R. Rodriguez goto out; 16703f2355cbSLuis R. Rodriguez } else { 1671fb1fc7adSLuis R. Rodriguez /* 1672fb1fc7adSLuis R. Rodriguez * Ignore IEs coming in on two separate wiphys with 1673fb1fc7adSLuis R. Rodriguez * the same alpha2 and environment cap 1674fb1fc7adSLuis R. Rodriguez */ 16753f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 16763f2355cbSLuis R. Rodriguez alpha2) && 16773f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 16783f2355cbSLuis R. Rodriguez goto out; 16793f2355cbSLuis R. Rodriguez } 16803f2355cbSLuis R. Rodriguez /* We could potentially intersect though */ 16813f2355cbSLuis R. Rodriguez goto out; 16823f2355cbSLuis R. Rodriguez } 16833f2355cbSLuis R. Rodriguez } 16843f2355cbSLuis R. Rodriguez 16853f2355cbSLuis R. Rodriguez rd = country_ie_2_rd(country_ie, country_ie_len, &checksum); 16863f2355cbSLuis R. Rodriguez if (!rd) 16873f2355cbSLuis R. Rodriguez goto out; 16883f2355cbSLuis R. Rodriguez 1689915278e0SLuis R. Rodriguez /* 1690915278e0SLuis R. Rodriguez * This will not happen right now but we leave it here for the 16913f2355cbSLuis R. Rodriguez * the future when we want to add suspend/resume support and having 16923f2355cbSLuis R. Rodriguez * the user move to another country after doing so, or having the user 1693915278e0SLuis R. Rodriguez * move to another AP. Right now we just trust the first AP. 1694915278e0SLuis R. Rodriguez * 1695915278e0SLuis R. Rodriguez * If we hit this before we add this support we want to be informed of 1696915278e0SLuis R. Rodriguez * it as it would indicate a mistake in the current design 1697915278e0SLuis R. Rodriguez */ 1698915278e0SLuis R. Rodriguez if (WARN_ON(reg_same_country_ie_hint(wiphy, checksum))) 16990441d6ffSLuis R. Rodriguez goto free_rd_out; 17003f2355cbSLuis R. Rodriguez 1701fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1702fe33eb39SLuis R. Rodriguez if (!request) 1703fe33eb39SLuis R. Rodriguez goto free_rd_out; 1704fe33eb39SLuis R. Rodriguez 1705fb1fc7adSLuis R. Rodriguez /* 1706fb1fc7adSLuis R. Rodriguez * We keep this around for when CRDA comes back with a response so 1707fb1fc7adSLuis R. Rodriguez * we can intersect with that 1708fb1fc7adSLuis R. Rodriguez */ 17093f2355cbSLuis R. Rodriguez country_ie_regdomain = rd; 17103f2355cbSLuis R. Rodriguez 1711fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1712fe33eb39SLuis R. Rodriguez request->alpha2[0] = rd->alpha2[0]; 1713fe33eb39SLuis R. Rodriguez request->alpha2[1] = rd->alpha2[1]; 1714fe33eb39SLuis R. Rodriguez request->initiator = REGDOM_SET_BY_COUNTRY_IE; 1715fe33eb39SLuis R. Rodriguez request->country_ie_checksum = checksum; 1716fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 17173f2355cbSLuis R. Rodriguez 1718fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1719fe33eb39SLuis R. Rodriguez 1720fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1721fe33eb39SLuis R. Rodriguez 1722fe33eb39SLuis R. Rodriguez return; 17230441d6ffSLuis R. Rodriguez 17240441d6ffSLuis R. Rodriguez free_rd_out: 17250441d6ffSLuis R. Rodriguez kfree(rd); 17263f2355cbSLuis R. Rodriguez out: 1727a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 17283f2355cbSLuis R. Rodriguez } 17293f2355cbSLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint_11d); 1730b2e1b302SLuis R. Rodriguez 1731e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 1732e38f8a7aSLuis R. Rodriguez { 1733e38f8a7aSLuis R. Rodriguez if (freq == ieee80211_channel_to_frequency(12) || 1734e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(13) || 1735e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(14)) 1736e38f8a7aSLuis R. Rodriguez return true; 1737e38f8a7aSLuis R. Rodriguez return false; 1738e38f8a7aSLuis R. Rodriguez } 1739e38f8a7aSLuis R. Rodriguez 1740e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 1741e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 1742e38f8a7aSLuis R. Rodriguez gfp_t gfp) 1743e38f8a7aSLuis R. Rodriguez { 1744e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1745e38f8a7aSLuis R. Rodriguez 1746e38f8a7aSLuis R. Rodriguez if (likely((beacon_chan->beacon_found || 1747e38f8a7aSLuis R. Rodriguez (beacon_chan->flags & IEEE80211_CHAN_RADAR) || 1748e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 1749e38f8a7aSLuis R. Rodriguez !freq_is_chan_12_13_14(beacon_chan->center_freq))))) 1750e38f8a7aSLuis R. Rodriguez return 0; 1751e38f8a7aSLuis R. Rodriguez 1752e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 1753e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 1754e38f8a7aSLuis R. Rodriguez return -ENOMEM; 1755e38f8a7aSLuis R. Rodriguez 1756e38f8a7aSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 1757e38f8a7aSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Found new beacon on " 1758e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", 1759e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 1760e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 1761e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 1762e38f8a7aSLuis R. Rodriguez #endif 1763e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 1764e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 1765e38f8a7aSLuis R. Rodriguez 1766e38f8a7aSLuis R. Rodriguez 1767e38f8a7aSLuis R. Rodriguez /* 1768e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 1769e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 1770e38f8a7aSLuis R. Rodriguez */ 1771e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1772e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 1773e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1774e38f8a7aSLuis R. Rodriguez 1775e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 1776e38f8a7aSLuis R. Rodriguez 1777e38f8a7aSLuis R. Rodriguez return 0; 1778e38f8a7aSLuis R. Rodriguez } 1779e38f8a7aSLuis R. Rodriguez 1780a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1781b2e1b302SLuis R. Rodriguez { 1782b2e1b302SLuis R. Rodriguez unsigned int i; 1783a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1784a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1785a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1786b2e1b302SLuis R. Rodriguez 1787b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), " 1788b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 1789b2e1b302SLuis R. Rodriguez 1790b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1791b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1792b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1793b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1794b2e1b302SLuis R. Rodriguez 1795fb1fc7adSLuis R. Rodriguez /* 1796fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 1797fb1fc7adSLuis R. Rodriguez * in certain regions 1798fb1fc7adSLuis R. Rodriguez */ 1799b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1800b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1801b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 1802b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1803b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1804b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1805b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1806b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1807b2e1b302SLuis R. Rodriguez else 1808b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1809b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 1810b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1811b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1812b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1813b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1814b2e1b302SLuis R. Rodriguez } 1815b2e1b302SLuis R. Rodriguez } 1816b2e1b302SLuis R. Rodriguez 1817a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 1818b2e1b302SLuis R. Rodriguez { 1819b2e1b302SLuis R. Rodriguez 18203f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 18213f2355cbSLuis R. Rodriguez 18223f2355cbSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { 1823806a9e39SLuis R. Rodriguez struct cfg80211_registered_device *drv; 1824806a9e39SLuis R. Rodriguez drv = cfg80211_drv_by_wiphy_idx( 1825806a9e39SLuis R. Rodriguez last_request->wiphy_idx); 1826806a9e39SLuis R. Rodriguez if (drv) { 18273f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 18283f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 18293f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0], 18303f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1]); 18313f2355cbSLuis R. Rodriguez } else 18323f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 18333f2355cbSLuis R. Rodriguez "domain intersected: \n"); 18343f2355cbSLuis R. Rodriguez } else 18353f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 1836039498c6SLuis R. Rodriguez "domain intersected: \n"); 18373f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 1838b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 1839b2e1b302SLuis R. Rodriguez "domain updated:\n"); 1840b2e1b302SLuis R. Rodriguez else { 1841b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 1842b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1843b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 1844b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 1845b2e1b302SLuis R. Rodriguez else 1846b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1847b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 1848b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1849b2e1b302SLuis R. Rodriguez } 1850b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1851b2e1b302SLuis R. Rodriguez } 1852b2e1b302SLuis R. Rodriguez 18532df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 1854b2e1b302SLuis R. Rodriguez { 1855b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 1856b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1857b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1858b2e1b302SLuis R. Rodriguez } 1859b2e1b302SLuis R. Rodriguez 18603f2355cbSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 18613f2355cbSLuis R. Rodriguez static void reg_country_ie_process_debug( 18623f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 18633f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 18643f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 18653f2355cbSLuis R. Rodriguez { 18663f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Received country IE:\n"); 18673f2355cbSLuis R. Rodriguez print_regdomain_info(country_ie_regdomain); 18683f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); 18693f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 18703f2355cbSLuis R. Rodriguez if (intersected_rd) { 18713f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: We intersect both of these " 18723f2355cbSLuis R. Rodriguez "and get:\n"); 1873667ecd01SLuis R. Rodriguez print_regdomain_info(intersected_rd); 18743f2355cbSLuis R. Rodriguez return; 18753f2355cbSLuis R. Rodriguez } 18763f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); 18773f2355cbSLuis R. Rodriguez } 18783f2355cbSLuis R. Rodriguez #else 18793f2355cbSLuis R. Rodriguez static inline void reg_country_ie_process_debug( 18803f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 18813f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 18823f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 18833f2355cbSLuis R. Rodriguez { 18843f2355cbSLuis R. Rodriguez } 18853f2355cbSLuis R. Rodriguez #endif 18863f2355cbSLuis R. Rodriguez 1887d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 1888a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 1889b2e1b302SLuis R. Rodriguez { 18909c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 18913f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv = NULL; 1892806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1893b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 1894b2e1b302SLuis R. Rodriguez 1895b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 1896f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1897b2e1b302SLuis R. Rodriguez return -EINVAL; 1898b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 1899b2e1b302SLuis R. Rodriguez return 0; 1900b2e1b302SLuis R. Rodriguez } 1901b2e1b302SLuis R. Rodriguez 1902b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 1903b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 1904b2e1b302SLuis R. Rodriguez return -EINVAL; 1905b2e1b302SLuis R. Rodriguez 1906f6037d09SJohannes Berg if (!last_request) 1907b2e1b302SLuis R. Rodriguez return -EINVAL; 1908b2e1b302SLuis R. Rodriguez 1909fb1fc7adSLuis R. Rodriguez /* 1910fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 19113f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 1912fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 1913fb1fc7adSLuis R. Rodriguez */ 19143f2355cbSLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) { 1915fb1fc7adSLuis R. Rodriguez /* 1916fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 1917fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 1918fb1fc7adSLuis R. Rodriguez */ 1919b2e1b302SLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 192069b1572bSLuis R. Rodriguez !regdom_changes(rd->alpha2)) 1921b2e1b302SLuis R. Rodriguez return -EINVAL; 19223f2355cbSLuis R. Rodriguez } 19233f2355cbSLuis R. Rodriguez 1924fb1fc7adSLuis R. Rodriguez /* 1925fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 1926b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 1927b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 1928fb1fc7adSLuis R. Rodriguez * internal EEPROM data 1929fb1fc7adSLuis R. Rodriguez */ 1930b2e1b302SLuis R. Rodriguez 1931f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1932b2e1b302SLuis R. Rodriguez return -EINVAL; 1933b2e1b302SLuis R. Rodriguez 1934b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 1935b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 1936b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 1937b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 1938b2e1b302SLuis R. Rodriguez return -EINVAL; 1939b2e1b302SLuis R. Rodriguez } 1940b2e1b302SLuis R. Rodriguez 1941806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1942806a9e39SLuis R. Rodriguez 1943b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 19443e0c3ff3SLuis R. Rodriguez int r; 19453e0c3ff3SLuis R. Rodriguez 19463e0c3ff3SLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_DRIVER) { 19473e0c3ff3SLuis R. Rodriguez reset_regdomains(); 19483e0c3ff3SLuis R. Rodriguez cfg80211_regdomain = rd; 19493e0c3ff3SLuis R. Rodriguez return 0; 19503e0c3ff3SLuis R. Rodriguez } 19513e0c3ff3SLuis R. Rodriguez 1952fb1fc7adSLuis R. Rodriguez /* 1953fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 1954fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 1955fb1fc7adSLuis R. Rodriguez */ 19563e0c3ff3SLuis R. Rodriguez 1957806a9e39SLuis R. Rodriguez BUG_ON(request_wiphy->regd); 19583e0c3ff3SLuis R. Rodriguez 1959806a9e39SLuis R. Rodriguez r = reg_copy_regd(&request_wiphy->regd, rd); 19603e0c3ff3SLuis R. Rodriguez if (r) 19613e0c3ff3SLuis R. Rodriguez return r; 19623e0c3ff3SLuis R. Rodriguez 1963b8295acdSLuis R. Rodriguez reset_regdomains(); 1964b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 1965b8295acdSLuis R. Rodriguez return 0; 1966b8295acdSLuis R. Rodriguez } 1967b8295acdSLuis R. Rodriguez 1968b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 1969b8295acdSLuis R. Rodriguez 1970b8295acdSLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) { 1971b8295acdSLuis R. Rodriguez 19729c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 19739c96477dSLuis R. Rodriguez if (!intersected_rd) 19749c96477dSLuis R. Rodriguez return -EINVAL; 1975b8295acdSLuis R. Rodriguez 1976fb1fc7adSLuis R. Rodriguez /* 1977fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 19783e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 1979fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 1980fb1fc7adSLuis R. Rodriguez */ 19813e0c3ff3SLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_DRIVER) 1982806a9e39SLuis R. Rodriguez request_wiphy->regd = rd; 19833e0c3ff3SLuis R. Rodriguez else 19849c96477dSLuis R. Rodriguez kfree(rd); 19853e0c3ff3SLuis R. Rodriguez 1986b8295acdSLuis R. Rodriguez rd = NULL; 1987b8295acdSLuis R. Rodriguez 1988b8295acdSLuis R. Rodriguez reset_regdomains(); 1989b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 1990b8295acdSLuis R. Rodriguez 1991b8295acdSLuis R. Rodriguez return 0; 19929c96477dSLuis R. Rodriguez } 19939c96477dSLuis R. Rodriguez 19943f2355cbSLuis R. Rodriguez /* 19953f2355cbSLuis R. Rodriguez * Country IE requests are handled a bit differently, we intersect 19963f2355cbSLuis R. Rodriguez * the country IE rd with what CRDA believes that country should have 19973f2355cbSLuis R. Rodriguez */ 19983f2355cbSLuis R. Rodriguez 19993f2355cbSLuis R. Rodriguez BUG_ON(!country_ie_regdomain); 20003f2355cbSLuis R. Rodriguez 20013f2355cbSLuis R. Rodriguez if (rd != country_ie_regdomain) { 2002fb1fc7adSLuis R. Rodriguez /* 2003fb1fc7adSLuis R. Rodriguez * Intersect what CRDA returned and our what we 2004fb1fc7adSLuis R. Rodriguez * had built from the Country IE received 2005fb1fc7adSLuis R. Rodriguez */ 20063f2355cbSLuis R. Rodriguez 20073f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, country_ie_regdomain); 20083f2355cbSLuis R. Rodriguez 20093f2355cbSLuis R. Rodriguez reg_country_ie_process_debug(rd, country_ie_regdomain, 20103f2355cbSLuis R. Rodriguez intersected_rd); 20113f2355cbSLuis R. Rodriguez 20123f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 20133f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 20143f2355cbSLuis R. Rodriguez } else { 2015fb1fc7adSLuis R. Rodriguez /* 2016fb1fc7adSLuis R. Rodriguez * This would happen when CRDA was not present and 20173f2355cbSLuis R. Rodriguez * OLD_REGULATORY was enabled. We intersect our Country 2018fb1fc7adSLuis R. Rodriguez * IE rd and what was set on cfg80211 originally 2019fb1fc7adSLuis R. Rodriguez */ 20203f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 20213f2355cbSLuis R. Rodriguez } 20223f2355cbSLuis R. Rodriguez 20233f2355cbSLuis R. Rodriguez if (!intersected_rd) 20243f2355cbSLuis R. Rodriguez return -EINVAL; 20253f2355cbSLuis R. Rodriguez 2026806a9e39SLuis R. Rodriguez drv = wiphy_to_dev(request_wiphy); 20273f2355cbSLuis R. Rodriguez 20283f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0] = rd->alpha2[0]; 20293f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1] = rd->alpha2[1]; 20303f2355cbSLuis R. Rodriguez drv->env = last_request->country_ie_env; 20313f2355cbSLuis R. Rodriguez 20323f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 20333f2355cbSLuis R. Rodriguez 20343f2355cbSLuis R. Rodriguez kfree(rd); 20353f2355cbSLuis R. Rodriguez rd = NULL; 20363f2355cbSLuis R. Rodriguez 2037b8295acdSLuis R. Rodriguez reset_regdomains(); 20383f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2039b2e1b302SLuis R. Rodriguez 2040b2e1b302SLuis R. Rodriguez return 0; 2041b2e1b302SLuis R. Rodriguez } 2042b2e1b302SLuis R. Rodriguez 2043b2e1b302SLuis R. Rodriguez 2044fb1fc7adSLuis R. Rodriguez /* 2045fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2046b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2047fb1fc7adSLuis R. Rodriguez * kmalloc'd the rd structure. Caller must hold cfg80211_mutex 2048fb1fc7adSLuis R. Rodriguez */ 2049a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2050b2e1b302SLuis R. Rodriguez { 2051b2e1b302SLuis R. Rodriguez int r; 2052b2e1b302SLuis R. Rodriguez 2053761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2054761cf7ecSLuis R. Rodriguez 2055b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 2056b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 2057d2372b31SJohannes Berg if (r) { 2058d2372b31SJohannes Berg kfree(rd); 2059b2e1b302SLuis R. Rodriguez return r; 2060d2372b31SJohannes Berg } 2061b2e1b302SLuis R. Rodriguez 2062b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 2063a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 2064b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 2065b2e1b302SLuis R. Rodriguez 2066b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2067f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 2068b2e1b302SLuis R. Rodriguez 2069a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 2070b2e1b302SLuis R. Rodriguez 2071b2e1b302SLuis R. Rodriguez return r; 2072b2e1b302SLuis R. Rodriguez } 2073b2e1b302SLuis R. Rodriguez 2074a1794390SLuis R. Rodriguez /* Caller must hold cfg80211_mutex */ 20753f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 20763f2355cbSLuis R. Rodriguez { 2077806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 2078806a9e39SLuis R. Rodriguez 2079761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2080761cf7ecSLuis R. Rodriguez 2081806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2082806a9e39SLuis R. Rodriguez 20833e0c3ff3SLuis R. Rodriguez kfree(wiphy->regd); 2084806a9e39SLuis R. Rodriguez if (!last_request || !request_wiphy) 20853f2355cbSLuis R. Rodriguez return; 2086806a9e39SLuis R. Rodriguez if (request_wiphy != wiphy) 20873f2355cbSLuis R. Rodriguez return; 2088806a9e39SLuis R. Rodriguez last_request->wiphy_idx = WIPHY_IDX_STALE; 20893f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 20903f2355cbSLuis R. Rodriguez } 20913f2355cbSLuis R. Rodriguez 2092b2e1b302SLuis R. Rodriguez int regulatory_init(void) 2093b2e1b302SLuis R. Rodriguez { 2094bcf4f99bSLuis R. Rodriguez int err = 0; 2095734366deSJohannes Berg 2096b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 2097b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 2098b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 2099734366deSJohannes Berg 2100fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 2101e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2102fe33eb39SLuis R. Rodriguez 2103734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 2104a3d2eaf0SJohannes Berg cfg80211_regdomain = static_regdom(ieee80211_regdom); 2105734366deSJohannes Berg 2106942b25cfSJohannes Berg printk(KERN_INFO "cfg80211: Using static regulatory domain info\n"); 2107734366deSJohannes Berg print_regdomain_info(cfg80211_regdomain); 2108fb1fc7adSLuis R. Rodriguez /* 2109fb1fc7adSLuis R. Rodriguez * The old code still requests for a new regdomain and if 2110734366deSJohannes Berg * you have CRDA you get it updated, otherwise you get 2111734366deSJohannes Berg * stuck with the static values. We ignore "EU" code as 2112fb1fc7adSLuis R. Rodriguez * that is not a valid ISO / IEC 3166 alpha2 2113fb1fc7adSLuis R. Rodriguez */ 2114ac9440a4SJohannes Berg if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U') 2115ba25c141SLuis R. Rodriguez err = regulatory_hint_core(ieee80211_regdom); 2116734366deSJohannes Berg #else 2117a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 2118734366deSJohannes Berg 2119ba25c141SLuis R. Rodriguez err = regulatory_hint_core("00"); 2120734366deSJohannes Berg #endif 2121bcf4f99bSLuis R. Rodriguez if (err) { 2122bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2123bcf4f99bSLuis R. Rodriguez return err; 2124bcf4f99bSLuis R. Rodriguez /* 2125bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2126bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2127bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2128bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2129bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2130bcf4f99bSLuis R. Rodriguez */ 2131bcf4f99bSLuis R. Rodriguez printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " 2132bcf4f99bSLuis R. Rodriguez "to call CRDA during init"); 2133bcf4f99bSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 2134bcf4f99bSLuis R. Rodriguez /* We want to find out exactly why when debugging */ 2135bcf4f99bSLuis R. Rodriguez WARN_ON(err); 2136bcf4f99bSLuis R. Rodriguez #endif 2137bcf4f99bSLuis R. Rodriguez } 2138734366deSJohannes Berg 2139b2e1b302SLuis R. Rodriguez return 0; 2140b2e1b302SLuis R. Rodriguez } 2141b2e1b302SLuis R. Rodriguez 2142b2e1b302SLuis R. Rodriguez void regulatory_exit(void) 2143b2e1b302SLuis R. Rodriguez { 2144fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2145e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2146fe33eb39SLuis R. Rodriguez 2147fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2148fe33eb39SLuis R. Rodriguez 2149a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 2150734366deSJohannes Berg 2151b2e1b302SLuis R. Rodriguez reset_regdomains(); 2152734366deSJohannes Berg 21533f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 21543f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 21553f2355cbSLuis R. Rodriguez 2156f6037d09SJohannes Berg kfree(last_request); 2157f6037d09SJohannes Berg 2158b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2159734366deSJohannes Berg 2160e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2161e38f8a7aSLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 2162e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2163e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2164e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2165e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2166e38f8a7aSLuis R. Rodriguez } 2167e38f8a7aSLuis R. Rodriguez } 2168e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2169e38f8a7aSLuis R. Rodriguez 2170e38f8a7aSLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 2171e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2172e38f8a7aSLuis R. Rodriguez ®_beacon_list, list) { 2173e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2174e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2175e38f8a7aSLuis R. Rodriguez } 2176e38f8a7aSLuis R. Rodriguez } 2177e38f8a7aSLuis R. Rodriguez 2178fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2179fe33eb39SLuis R. Rodriguez if (!list_empty(®_requests_list)) { 2180fe33eb39SLuis R. Rodriguez list_for_each_entry_safe(reg_request, tmp, 2181fe33eb39SLuis R. Rodriguez ®_requests_list, list) { 2182fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2183fe33eb39SLuis R. Rodriguez kfree(reg_request); 2184fe33eb39SLuis R. Rodriguez } 2185fe33eb39SLuis R. Rodriguez } 2186fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2187fe33eb39SLuis R. Rodriguez 2188a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 21898318d78aSJohannes Berg } 2190