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 57734366deSJohannes Berg /* Central wireless core regulatory domains, we only need two, 58734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 59734366deSJohannes Berg * information to give us an alpha2 */ 60a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_regdomain; 61734366deSJohannes Berg 623f2355cbSLuis R. Rodriguez /* We use this as a place for the rd structure built from the 633f2355cbSLuis R. Rodriguez * last parsed country IE to rest until CRDA gets back to us with 643f2355cbSLuis R. Rodriguez * what it thinks should apply for the same country */ 653f2355cbSLuis R. Rodriguez static const struct ieee80211_regdomain *country_ie_regdomain; 663f2355cbSLuis R. Rodriguez 67734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 68734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 69734366deSJohannes Berg .n_reg_rules = 1, 70734366deSJohannes Berg .alpha2 = "00", 71734366deSJohannes Berg .reg_rules = { 72734366deSJohannes Berg REG_RULE(2412-10, 2462+10, 40, 6, 20, 73734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN | 74734366deSJohannes Berg NL80211_RRF_NO_IBSS), 75734366deSJohannes Berg } 76734366deSJohannes Berg }; 77734366deSJohannes Berg 78a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 79a3d2eaf0SJohannes Berg &world_regdom; 80734366deSJohannes Berg 81734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 82734366deSJohannes Berg static char *ieee80211_regdom = "US"; 83734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 84734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 85734366deSJohannes Berg 86734366deSJohannes Berg /* We assume 40 MHz bandwidth for the old regulatory work. 87734366deSJohannes Berg * We make emphasis we are using the exact same frequencies 88734366deSJohannes Berg * as before */ 89734366deSJohannes Berg 90734366deSJohannes Berg static const struct ieee80211_regdomain us_regdom = { 91734366deSJohannes Berg .n_reg_rules = 6, 92734366deSJohannes Berg .alpha2 = "US", 93734366deSJohannes Berg .reg_rules = { 94734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..11 */ 95734366deSJohannes Berg REG_RULE(2412-10, 2462+10, 40, 6, 27, 0), 96734366deSJohannes Berg /* IEEE 802.11a, channel 36 */ 97734366deSJohannes Berg REG_RULE(5180-10, 5180+10, 40, 6, 23, 0), 98734366deSJohannes Berg /* IEEE 802.11a, channel 40 */ 99734366deSJohannes Berg REG_RULE(5200-10, 5200+10, 40, 6, 23, 0), 100734366deSJohannes Berg /* IEEE 802.11a, channel 44 */ 101734366deSJohannes Berg REG_RULE(5220-10, 5220+10, 40, 6, 23, 0), 102734366deSJohannes Berg /* IEEE 802.11a, channels 48..64 */ 103734366deSJohannes Berg REG_RULE(5240-10, 5320+10, 40, 6, 23, 0), 104734366deSJohannes Berg /* IEEE 802.11a, channels 149..165, outdoor */ 105734366deSJohannes Berg REG_RULE(5745-10, 5825+10, 40, 6, 30, 0), 106734366deSJohannes Berg } 107734366deSJohannes Berg }; 108734366deSJohannes Berg 109734366deSJohannes Berg static const struct ieee80211_regdomain jp_regdom = { 110734366deSJohannes Berg .n_reg_rules = 3, 111734366deSJohannes Berg .alpha2 = "JP", 112734366deSJohannes Berg .reg_rules = { 113734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..14 */ 114734366deSJohannes Berg REG_RULE(2412-10, 2484+10, 40, 6, 20, 0), 115734366deSJohannes Berg /* IEEE 802.11a, channels 34..48 */ 116734366deSJohannes Berg REG_RULE(5170-10, 5240+10, 40, 6, 20, 117734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 118734366deSJohannes Berg /* IEEE 802.11a, channels 52..64 */ 119734366deSJohannes Berg REG_RULE(5260-10, 5320+10, 40, 6, 20, 120734366deSJohannes Berg NL80211_RRF_NO_IBSS | 121734366deSJohannes Berg NL80211_RRF_DFS), 122734366deSJohannes Berg } 123734366deSJohannes Berg }; 124734366deSJohannes Berg 125734366deSJohannes Berg static const struct ieee80211_regdomain eu_regdom = { 126734366deSJohannes Berg .n_reg_rules = 6, 127734366deSJohannes Berg /* This alpha2 is bogus, we leave it here just for stupid 128734366deSJohannes Berg * backward compatibility */ 129734366deSJohannes Berg .alpha2 = "EU", 130734366deSJohannes Berg .reg_rules = { 131734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..13 */ 132734366deSJohannes Berg REG_RULE(2412-10, 2472+10, 40, 6, 20, 0), 133734366deSJohannes Berg /* IEEE 802.11a, channel 36 */ 134734366deSJohannes Berg REG_RULE(5180-10, 5180+10, 40, 6, 23, 135734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 136734366deSJohannes Berg /* IEEE 802.11a, channel 40 */ 137734366deSJohannes Berg REG_RULE(5200-10, 5200+10, 40, 6, 23, 138734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 139734366deSJohannes Berg /* IEEE 802.11a, channel 44 */ 140734366deSJohannes Berg REG_RULE(5220-10, 5220+10, 40, 6, 23, 141734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 142734366deSJohannes Berg /* IEEE 802.11a, channels 48..64 */ 143734366deSJohannes Berg REG_RULE(5240-10, 5320+10, 40, 6, 20, 144734366deSJohannes Berg NL80211_RRF_NO_IBSS | 145734366deSJohannes Berg NL80211_RRF_DFS), 146734366deSJohannes Berg /* IEEE 802.11a, channels 100..140 */ 147734366deSJohannes Berg REG_RULE(5500-10, 5700+10, 40, 6, 30, 148734366deSJohannes Berg NL80211_RRF_NO_IBSS | 149734366deSJohannes Berg NL80211_RRF_DFS), 150734366deSJohannes Berg } 151734366deSJohannes Berg }; 152734366deSJohannes Berg 153734366deSJohannes Berg static const struct ieee80211_regdomain *static_regdom(char *alpha2) 154734366deSJohannes Berg { 155734366deSJohannes Berg if (alpha2[0] == 'U' && alpha2[1] == 'S') 156734366deSJohannes Berg return &us_regdom; 157734366deSJohannes Berg if (alpha2[0] == 'J' && alpha2[1] == 'P') 158734366deSJohannes Berg return &jp_regdom; 159734366deSJohannes Berg if (alpha2[0] == 'E' && alpha2[1] == 'U') 160734366deSJohannes Berg return &eu_regdom; 161734366deSJohannes Berg /* Default, as per the old rules */ 162734366deSJohannes Berg return &us_regdom; 163734366deSJohannes Berg } 164734366deSJohannes Berg 165a3d2eaf0SJohannes Berg static bool is_old_static_regdom(const struct ieee80211_regdomain *rd) 166734366deSJohannes Berg { 167734366deSJohannes Berg if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom) 168734366deSJohannes Berg return true; 169734366deSJohannes Berg return false; 170734366deSJohannes Berg } 171734366deSJohannes Berg #else 172942b25cfSJohannes Berg static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd) 173942b25cfSJohannes Berg { 174942b25cfSJohannes Berg return false; 175942b25cfSJohannes Berg } 176942b25cfSJohannes Berg #endif 177942b25cfSJohannes Berg 178734366deSJohannes Berg static void reset_regdomains(void) 179734366deSJohannes Berg { 180942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 181942b25cfSJohannes Berg if (cfg80211_regdomain == cfg80211_world_regdom) 182942b25cfSJohannes Berg cfg80211_regdomain = NULL; 183942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 184942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 185942b25cfSJohannes Berg if (cfg80211_regdomain == &world_regdom) 186942b25cfSJohannes Berg cfg80211_regdomain = NULL; 187942b25cfSJohannes Berg if (is_old_static_regdom(cfg80211_regdomain)) 188942b25cfSJohannes Berg cfg80211_regdomain = NULL; 189942b25cfSJohannes Berg 190734366deSJohannes Berg kfree(cfg80211_regdomain); 191734366deSJohannes Berg kfree(cfg80211_world_regdom); 192734366deSJohannes Berg 193a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 194734366deSJohannes Berg cfg80211_regdomain = NULL; 195734366deSJohannes Berg } 196734366deSJohannes Berg 197734366deSJohannes Berg /* Dynamic world regulatory domain requested by the wireless 198734366deSJohannes Berg * core upon initialization */ 199a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 200734366deSJohannes Berg { 201f6037d09SJohannes Berg BUG_ON(!last_request); 202734366deSJohannes Berg 203734366deSJohannes Berg reset_regdomains(); 204734366deSJohannes Berg 205734366deSJohannes Berg cfg80211_world_regdom = rd; 206734366deSJohannes Berg cfg80211_regdomain = rd; 207734366deSJohannes Berg } 208734366deSJohannes Berg 209a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 210b2e1b302SLuis R. Rodriguez { 211b2e1b302SLuis R. Rodriguez if (!alpha2) 212b2e1b302SLuis R. Rodriguez return false; 213b2e1b302SLuis R. Rodriguez if (alpha2[0] == '0' && alpha2[1] == '0') 214b2e1b302SLuis R. Rodriguez return true; 215b2e1b302SLuis R. Rodriguez return false; 216b2e1b302SLuis R. Rodriguez } 217b2e1b302SLuis R. Rodriguez 218a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 219b2e1b302SLuis R. Rodriguez { 220b2e1b302SLuis R. Rodriguez if (!alpha2) 221b2e1b302SLuis R. Rodriguez return false; 222b2e1b302SLuis R. Rodriguez if (alpha2[0] != 0 && alpha2[1] != 0) 223b2e1b302SLuis R. Rodriguez return true; 224b2e1b302SLuis R. Rodriguez return false; 225b2e1b302SLuis R. Rodriguez } 226b2e1b302SLuis R. Rodriguez 227b2e1b302SLuis R. Rodriguez static bool is_alpha_upper(char letter) 228b2e1b302SLuis R. Rodriguez { 229b2e1b302SLuis R. Rodriguez /* ASCII A - Z */ 230b2e1b302SLuis R. Rodriguez if (letter >= 65 && letter <= 90) 231b2e1b302SLuis R. Rodriguez return true; 232b2e1b302SLuis R. Rodriguez return false; 233b2e1b302SLuis R. Rodriguez } 234b2e1b302SLuis R. Rodriguez 235a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 236b2e1b302SLuis R. Rodriguez { 237b2e1b302SLuis R. Rodriguez if (!alpha2) 238b2e1b302SLuis R. Rodriguez return false; 239b2e1b302SLuis R. Rodriguez /* Special case where regulatory domain was built by driver 240b2e1b302SLuis R. Rodriguez * but a specific alpha2 cannot be determined */ 241b2e1b302SLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '9') 242b2e1b302SLuis R. Rodriguez return true; 243b2e1b302SLuis R. Rodriguez return false; 244b2e1b302SLuis R. Rodriguez } 245b2e1b302SLuis R. Rodriguez 2463f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2473f2355cbSLuis R. Rodriguez { 2483f2355cbSLuis R. Rodriguez if (!alpha2) 2493f2355cbSLuis R. Rodriguez return false; 2503f2355cbSLuis R. Rodriguez /* Special case where regulatory domain is the 2513f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 2523f2355cbSLuis R. Rodriguez * structures */ 2533f2355cbSLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '8') 2543f2355cbSLuis R. Rodriguez return true; 2553f2355cbSLuis R. Rodriguez return false; 2563f2355cbSLuis R. Rodriguez } 2573f2355cbSLuis R. Rodriguez 258a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 259b2e1b302SLuis R. Rodriguez { 260b2e1b302SLuis R. Rodriguez if (!alpha2) 261b2e1b302SLuis R. Rodriguez return false; 262b2e1b302SLuis R. Rodriguez if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) 263b2e1b302SLuis R. Rodriguez return true; 264b2e1b302SLuis R. Rodriguez return false; 265b2e1b302SLuis R. Rodriguez } 266b2e1b302SLuis R. Rodriguez 267a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 268b2e1b302SLuis R. Rodriguez { 269b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 270b2e1b302SLuis R. Rodriguez return false; 271b2e1b302SLuis R. Rodriguez if (alpha2_x[0] == alpha2_y[0] && 272b2e1b302SLuis R. Rodriguez alpha2_x[1] == alpha2_y[1]) 273b2e1b302SLuis R. Rodriguez return true; 274b2e1b302SLuis R. Rodriguez return false; 275b2e1b302SLuis R. Rodriguez } 276b2e1b302SLuis R. Rodriguez 277a3d2eaf0SJohannes Berg static bool regdom_changed(const char *alpha2) 278b2e1b302SLuis R. Rodriguez { 279b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 280b2e1b302SLuis R. Rodriguez return true; 281b2e1b302SLuis R. Rodriguez if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 282b2e1b302SLuis R. Rodriguez return false; 283b2e1b302SLuis R. Rodriguez return true; 284b2e1b302SLuis R. Rodriguez } 285b2e1b302SLuis R. Rodriguez 2863f2355cbSLuis R. Rodriguez /** 2873f2355cbSLuis R. Rodriguez * country_ie_integrity_changes - tells us if the country IE has changed 2883f2355cbSLuis R. Rodriguez * @checksum: checksum of country IE of fields we are interested in 2893f2355cbSLuis R. Rodriguez * 2903f2355cbSLuis R. Rodriguez * If the country IE has not changed you can ignore it safely. This is 2913f2355cbSLuis R. Rodriguez * useful to determine if two devices are seeing two different country IEs 2923f2355cbSLuis R. Rodriguez * even on the same alpha2. Note that this will return false if no IE has 2933f2355cbSLuis R. Rodriguez * been set on the wireless core yet. 2943f2355cbSLuis R. Rodriguez */ 2953f2355cbSLuis R. Rodriguez static bool country_ie_integrity_changes(u32 checksum) 2963f2355cbSLuis R. Rodriguez { 2973f2355cbSLuis R. Rodriguez /* If no IE has been set then the checksum doesn't change */ 2983f2355cbSLuis R. Rodriguez if (unlikely(!last_request->country_ie_checksum)) 2993f2355cbSLuis R. Rodriguez return false; 3003f2355cbSLuis R. Rodriguez if (unlikely(last_request->country_ie_checksum != checksum)) 3013f2355cbSLuis R. Rodriguez return true; 3023f2355cbSLuis R. Rodriguez return false; 3033f2355cbSLuis R. Rodriguez } 3043f2355cbSLuis R. Rodriguez 305b2e1b302SLuis R. Rodriguez /* This lets us keep regulatory code which is updated on a regulatory 306b2e1b302SLuis R. Rodriguez * basis in userspace. */ 307b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 308b2e1b302SLuis R. Rodriguez { 309b2e1b302SLuis R. Rodriguez char country_env[9 + 2] = "COUNTRY="; 310b2e1b302SLuis R. Rodriguez char *envp[] = { 311b2e1b302SLuis R. Rodriguez country_env, 312b2e1b302SLuis R. Rodriguez NULL 3138318d78aSJohannes Berg }; 3148318d78aSJohannes Berg 315b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 316b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", 317b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 318b2e1b302SLuis R. Rodriguez else 319b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA to update world " 320b2e1b302SLuis R. Rodriguez "regulatory domain\n"); 3218318d78aSJohannes Berg 322b2e1b302SLuis R. Rodriguez country_env[8] = alpha2[0]; 323b2e1b302SLuis R. Rodriguez country_env[9] = alpha2[1]; 3248318d78aSJohannes Berg 325b2e1b302SLuis R. Rodriguez return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); 326b2e1b302SLuis R. Rodriguez } 327b2e1b302SLuis R. Rodriguez 328b2e1b302SLuis R. Rodriguez /* Used by nl80211 before kmalloc'ing our regulatory domain */ 329a3d2eaf0SJohannes Berg bool reg_is_valid_request(const char *alpha2) 330b2e1b302SLuis R. Rodriguez { 331f6037d09SJohannes Berg if (!last_request) 332f6037d09SJohannes Berg return false; 333f6037d09SJohannes Berg 334f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 335b2e1b302SLuis R. Rodriguez } 336b2e1b302SLuis R. Rodriguez 337b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 338a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 339b2e1b302SLuis R. Rodriguez { 340a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 341b2e1b302SLuis R. Rodriguez u32 freq_diff; 342b2e1b302SLuis R. Rodriguez 34391e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 344b2e1b302SLuis R. Rodriguez return false; 345b2e1b302SLuis R. Rodriguez 346b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 347b2e1b302SLuis R. Rodriguez return false; 348b2e1b302SLuis R. Rodriguez 349b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 350b2e1b302SLuis R. Rodriguez 351d71aaf60SLuis R. Rodriguez if (freq_diff <= 0 || freq_range->max_bandwidth_khz > freq_diff) 352b2e1b302SLuis R. Rodriguez return false; 353b2e1b302SLuis R. Rodriguez 354b2e1b302SLuis R. Rodriguez return true; 355b2e1b302SLuis R. Rodriguez } 356b2e1b302SLuis R. Rodriguez 357a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 358b2e1b302SLuis R. Rodriguez { 359a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 360b2e1b302SLuis R. Rodriguez unsigned int i; 361b2e1b302SLuis R. Rodriguez 362b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 363b2e1b302SLuis R. Rodriguez return false; 364b2e1b302SLuis R. Rodriguez 36588dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 36688dc1c3fSLuis R. Rodriguez return false; 36788dc1c3fSLuis R. Rodriguez 368b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 369b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 370b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 371b2e1b302SLuis R. Rodriguez return false; 372b2e1b302SLuis R. Rodriguez } 373b2e1b302SLuis R. Rodriguez 374b2e1b302SLuis R. Rodriguez return true; 375b2e1b302SLuis R. Rodriguez } 376b2e1b302SLuis R. Rodriguez 377b2e1b302SLuis R. Rodriguez /* Returns value in KHz */ 378b2e1b302SLuis R. Rodriguez static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range, 379b2e1b302SLuis R. Rodriguez u32 freq) 380b2e1b302SLuis R. Rodriguez { 381b2e1b302SLuis R. Rodriguez unsigned int i; 382b2e1b302SLuis R. Rodriguez for (i = 0; i < ARRAY_SIZE(supported_bandwidths); i++) { 383b2e1b302SLuis R. Rodriguez u32 start_freq_khz = freq - supported_bandwidths[i]/2; 384b2e1b302SLuis R. Rodriguez u32 end_freq_khz = freq + supported_bandwidths[i]/2; 385b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 386b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 387b2e1b302SLuis R. Rodriguez return supported_bandwidths[i]; 388b2e1b302SLuis R. Rodriguez } 389b2e1b302SLuis R. Rodriguez return 0; 390b2e1b302SLuis R. Rodriguez } 391b2e1b302SLuis R. Rodriguez 3920c7dc45dSLuis R. Rodriguez /** 3930c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 3940c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 3950c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 3960c7dc45dSLuis R. Rodriguez * 3970c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 3980c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 3990c7dc45dSLuis R. Rodriguez * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is 4000c7dc45dSLuis R. Rodriguez * safe for now to assume that a frequency rule should not be part of a 4010c7dc45dSLuis R. Rodriguez * frequency's band if the start freq or end freq are off by more than 2 GHz. 4020c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 4030c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 4040c7dc45dSLuis R. Rodriguez **/ 4050c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 4060c7dc45dSLuis R. Rodriguez u32 freq_khz) 4070c7dc45dSLuis R. Rodriguez { 4080c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 4090c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4100c7dc45dSLuis R. Rodriguez return true; 4110c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4120c7dc45dSLuis R. Rodriguez return true; 4130c7dc45dSLuis R. Rodriguez return false; 4140c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 4150c7dc45dSLuis R. Rodriguez } 4160c7dc45dSLuis R. Rodriguez 4173f2355cbSLuis R. Rodriguez /* Converts a country IE to a regulatory domain. A regulatory domain 4183f2355cbSLuis R. Rodriguez * structure has a lot of information which the IE doesn't yet have, 4193f2355cbSLuis R. Rodriguez * so for the other values we use upper max values as we will intersect 4203f2355cbSLuis R. Rodriguez * with our userspace regulatory agent to get lower bounds. */ 4213f2355cbSLuis R. Rodriguez static struct ieee80211_regdomain *country_ie_2_rd( 4223f2355cbSLuis R. Rodriguez u8 *country_ie, 4233f2355cbSLuis R. Rodriguez u8 country_ie_len, 4243f2355cbSLuis R. Rodriguez u32 *checksum) 4253f2355cbSLuis R. Rodriguez { 4263f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 4273f2355cbSLuis R. Rodriguez unsigned int i = 0; 4283f2355cbSLuis R. Rodriguez char alpha2[2]; 4293f2355cbSLuis R. Rodriguez u32 flags = 0; 4303f2355cbSLuis R. Rodriguez u32 num_rules = 0, size_of_regd = 0; 4313f2355cbSLuis R. Rodriguez u8 *triplets_start = NULL; 4323f2355cbSLuis R. Rodriguez u8 len_at_triplet = 0; 4333f2355cbSLuis R. Rodriguez /* the last channel we have registered in a subband (triplet) */ 4343f2355cbSLuis R. Rodriguez int last_sub_max_channel = 0; 4353f2355cbSLuis R. Rodriguez 4363f2355cbSLuis R. Rodriguez *checksum = 0xDEADBEEF; 4373f2355cbSLuis R. Rodriguez 4383f2355cbSLuis R. Rodriguez /* Country IE requirements */ 4393f2355cbSLuis R. Rodriguez BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || 4403f2355cbSLuis R. Rodriguez country_ie_len & 0x01); 4413f2355cbSLuis R. Rodriguez 4423f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 4433f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 4443f2355cbSLuis R. Rodriguez 4453f2355cbSLuis R. Rodriguez /* 4463f2355cbSLuis R. Rodriguez * Third octet can be: 4473f2355cbSLuis R. Rodriguez * 'I' - Indoor 4483f2355cbSLuis R. Rodriguez * 'O' - Outdoor 4493f2355cbSLuis R. Rodriguez * 4503f2355cbSLuis R. Rodriguez * anything else we assume is no restrictions 4513f2355cbSLuis R. Rodriguez */ 4523f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 4533f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_OUTDOOR; 4543f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 4553f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_INDOOR; 4563f2355cbSLuis R. Rodriguez 4573f2355cbSLuis R. Rodriguez country_ie += 3; 4583f2355cbSLuis R. Rodriguez country_ie_len -= 3; 4593f2355cbSLuis R. Rodriguez 4603f2355cbSLuis R. Rodriguez triplets_start = country_ie; 4613f2355cbSLuis R. Rodriguez len_at_triplet = country_ie_len; 4623f2355cbSLuis R. Rodriguez 4633f2355cbSLuis R. Rodriguez *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); 4643f2355cbSLuis R. Rodriguez 4653f2355cbSLuis R. Rodriguez /* We need to build a reg rule for each triplet, but first we must 4663f2355cbSLuis R. Rodriguez * calculate the number of reg rules we will need. We will need one 4673f2355cbSLuis R. Rodriguez * for each channel subband */ 4683f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 4693f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 4703f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 4713f2355cbSLuis R. Rodriguez int cur_sub_max_channel = 0, cur_channel = 0; 4723f2355cbSLuis R. Rodriguez 4733f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 4743f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 4753f2355cbSLuis R. Rodriguez country_ie += 3; 4763f2355cbSLuis R. Rodriguez country_ie_len -= 3; 4773f2355cbSLuis R. Rodriguez continue; 4783f2355cbSLuis R. Rodriguez } 4793f2355cbSLuis R. Rodriguez 4803f2355cbSLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 4813f2355cbSLuis R. Rodriguez cur_sub_max_channel = ieee80211_channel_to_frequency( 4823f2355cbSLuis R. Rodriguez cur_channel + triplet->chans.num_channels); 4833f2355cbSLuis R. Rodriguez 4843f2355cbSLuis R. Rodriguez /* Basic sanity check */ 4853f2355cbSLuis R. Rodriguez if (cur_sub_max_channel < cur_channel) 4863f2355cbSLuis R. Rodriguez return NULL; 4873f2355cbSLuis R. Rodriguez 4883f2355cbSLuis R. Rodriguez /* Do not allow overlapping channels. Also channels 4893f2355cbSLuis R. Rodriguez * passed in each subband must be monotonically 4903f2355cbSLuis R. Rodriguez * increasing */ 4913f2355cbSLuis R. Rodriguez if (last_sub_max_channel) { 4923f2355cbSLuis R. Rodriguez if (cur_channel <= last_sub_max_channel) 4933f2355cbSLuis R. Rodriguez return NULL; 4943f2355cbSLuis R. Rodriguez if (cur_sub_max_channel <= last_sub_max_channel) 4953f2355cbSLuis R. Rodriguez return NULL; 4963f2355cbSLuis R. Rodriguez } 4973f2355cbSLuis R. Rodriguez 4983f2355cbSLuis R. Rodriguez /* When dot11RegulatoryClassesRequired is supported 4993f2355cbSLuis R. Rodriguez * we can throw ext triplets as part of this soup, 5003f2355cbSLuis R. Rodriguez * for now we don't care when those change as we 5013f2355cbSLuis R. Rodriguez * don't support them */ 5023f2355cbSLuis R. Rodriguez *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | 5033f2355cbSLuis R. Rodriguez ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | 5043f2355cbSLuis R. Rodriguez ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); 5053f2355cbSLuis R. Rodriguez 5063f2355cbSLuis R. Rodriguez last_sub_max_channel = cur_sub_max_channel; 5073f2355cbSLuis R. Rodriguez 5083f2355cbSLuis R. Rodriguez country_ie += 3; 5093f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5103f2355cbSLuis R. Rodriguez num_rules++; 5113f2355cbSLuis R. Rodriguez 5123f2355cbSLuis R. Rodriguez /* Note: this is not a IEEE requirement but 5133f2355cbSLuis R. Rodriguez * simply a memory requirement */ 5143f2355cbSLuis R. Rodriguez if (num_rules > NL80211_MAX_SUPP_REG_RULES) 5153f2355cbSLuis R. Rodriguez return NULL; 5163f2355cbSLuis R. Rodriguez } 5173f2355cbSLuis R. Rodriguez 5183f2355cbSLuis R. Rodriguez country_ie = triplets_start; 5193f2355cbSLuis R. Rodriguez country_ie_len = len_at_triplet; 5203f2355cbSLuis R. Rodriguez 5213f2355cbSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 5223f2355cbSLuis R. Rodriguez (num_rules * sizeof(struct ieee80211_reg_rule)); 5233f2355cbSLuis R. Rodriguez 5243f2355cbSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 5253f2355cbSLuis R. Rodriguez if (!rd) 5263f2355cbSLuis R. Rodriguez return NULL; 5273f2355cbSLuis R. Rodriguez 5283f2355cbSLuis R. Rodriguez rd->n_reg_rules = num_rules; 5293f2355cbSLuis R. Rodriguez rd->alpha2[0] = alpha2[0]; 5303f2355cbSLuis R. Rodriguez rd->alpha2[1] = alpha2[1]; 5313f2355cbSLuis R. Rodriguez 5323f2355cbSLuis R. Rodriguez /* This time around we fill in the rd */ 5333f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 53402e68a3dSLuis R. Rodriguez int end_channel = 0; 5353f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 5363f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 5373f2355cbSLuis R. Rodriguez struct ieee80211_reg_rule *reg_rule = NULL; 5383f2355cbSLuis R. Rodriguez struct ieee80211_freq_range *freq_range = NULL; 5393f2355cbSLuis R. Rodriguez struct ieee80211_power_rule *power_rule = NULL; 5403f2355cbSLuis R. Rodriguez 5413f2355cbSLuis R. Rodriguez /* Must parse if dot11RegulatoryClassesRequired is true, 5423f2355cbSLuis R. Rodriguez * we don't support this yet */ 5433f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 5443f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 5453f2355cbSLuis R. Rodriguez country_ie += 3; 5463f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5473f2355cbSLuis R. Rodriguez continue; 5483f2355cbSLuis R. Rodriguez } 5493f2355cbSLuis R. Rodriguez 5503f2355cbSLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 5513f2355cbSLuis R. Rodriguez freq_range = ®_rule->freq_range; 5523f2355cbSLuis R. Rodriguez power_rule = ®_rule->power_rule; 5533f2355cbSLuis R. Rodriguez 5543f2355cbSLuis R. Rodriguez reg_rule->flags = flags; 5553f2355cbSLuis R. Rodriguez 55602e68a3dSLuis R. Rodriguez /* 2 GHz */ 55702e68a3dSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 55802e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 55902e68a3dSLuis R. Rodriguez triplet->chans.num_channels; 56002e68a3dSLuis R. Rodriguez else 56102e68a3dSLuis R. Rodriguez /* 56202e68a3dSLuis R. Rodriguez * 5 GHz -- For example in country IEs if the first 56302e68a3dSLuis R. Rodriguez * channel given is 36 and the number of channels is 4 56402e68a3dSLuis R. Rodriguez * then the individual channel numbers defined for the 56502e68a3dSLuis R. Rodriguez * 5 GHz PHY by these parameters are: 36, 40, 44, and 48 56602e68a3dSLuis R. Rodriguez * and not 36, 37, 38, 39. 56702e68a3dSLuis R. Rodriguez * 56802e68a3dSLuis R. Rodriguez * See: http://tinyurl.com/11d-clarification 56902e68a3dSLuis R. Rodriguez */ 57002e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 57102e68a3dSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 57202e68a3dSLuis R. Rodriguez 5733f2355cbSLuis R. Rodriguez /* The +10 is since the regulatory domain expects 5743f2355cbSLuis R. Rodriguez * the actual band edge, not the center of freq for 5753f2355cbSLuis R. Rodriguez * its start and end freqs, assuming 20 MHz bandwidth on 5763f2355cbSLuis R. Rodriguez * the channels passed */ 5773f2355cbSLuis R. Rodriguez freq_range->start_freq_khz = 5783f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 5793f2355cbSLuis R. Rodriguez triplet->chans.first_channel) - 10); 5803f2355cbSLuis R. Rodriguez freq_range->end_freq_khz = 5813f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 58202e68a3dSLuis R. Rodriguez end_channel) + 10); 5833f2355cbSLuis R. Rodriguez 5843f2355cbSLuis R. Rodriguez /* Large arbitrary values, we intersect later */ 5853f2355cbSLuis R. Rodriguez /* Increment this if we ever support >= 40 MHz channels 5863f2355cbSLuis R. Rodriguez * in IEEE 802.11 */ 5873f2355cbSLuis R. Rodriguez freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); 5883f2355cbSLuis R. Rodriguez power_rule->max_antenna_gain = DBI_TO_MBI(100); 5893f2355cbSLuis R. Rodriguez power_rule->max_eirp = DBM_TO_MBM(100); 5903f2355cbSLuis R. Rodriguez 5913f2355cbSLuis R. Rodriguez country_ie += 3; 5923f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5933f2355cbSLuis R. Rodriguez i++; 5943f2355cbSLuis R. Rodriguez 5953f2355cbSLuis R. Rodriguez BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); 5963f2355cbSLuis R. Rodriguez } 5973f2355cbSLuis R. Rodriguez 5983f2355cbSLuis R. Rodriguez return rd; 5993f2355cbSLuis R. Rodriguez } 6003f2355cbSLuis R. Rodriguez 6013f2355cbSLuis R. Rodriguez 6029c96477dSLuis R. Rodriguez /* Helper for regdom_intersect(), this does the real 6039c96477dSLuis R. Rodriguez * mathematical intersection fun */ 6049c96477dSLuis R. Rodriguez static int reg_rules_intersect( 6059c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 6069c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 6079c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 6089c96477dSLuis R. Rodriguez { 6099c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 6109c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 6119c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 6129c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 6139c96477dSLuis R. Rodriguez u32 freq_diff; 6149c96477dSLuis R. Rodriguez 6159c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 6169c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 6179c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 6189c96477dSLuis R. Rodriguez 6199c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 6209c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 6219c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 6229c96477dSLuis R. Rodriguez 6239c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 6249c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 6259c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 6269c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 6279c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 6289c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 6299c96477dSLuis R. Rodriguez 6309c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 6319c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 6329c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 6339c96477dSLuis R. Rodriguez 6349c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 6359c96477dSLuis R. Rodriguez power_rule2->max_eirp); 6369c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 6379c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 6389c96477dSLuis R. Rodriguez 6399c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 6409c96477dSLuis R. Rodriguez 6419c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 6429c96477dSLuis R. Rodriguez return -EINVAL; 6439c96477dSLuis R. Rodriguez 6449c96477dSLuis R. Rodriguez return 0; 6459c96477dSLuis R. Rodriguez } 6469c96477dSLuis R. Rodriguez 6479c96477dSLuis R. Rodriguez /** 6489c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 6499c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 6509c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 6519c96477dSLuis R. Rodriguez * 6529c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 6539c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 6549c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 6559c96477dSLuis R. Rodriguez * 6569c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 6579c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 6589c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 6599c96477dSLuis R. Rodriguez */ 6609c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 6619c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 6629c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 6639c96477dSLuis R. Rodriguez { 6649c96477dSLuis R. Rodriguez int r, size_of_regd; 6659c96477dSLuis R. Rodriguez unsigned int x, y; 6669c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 6679c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 6689c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 6699c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 6709c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 6719c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 6729c96477dSLuis R. Rodriguez 6739c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 6749c96477dSLuis R. Rodriguez intersected_rule = &irule; 6759c96477dSLuis R. Rodriguez 6769c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 6779c96477dSLuis R. Rodriguez 6789c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 6799c96477dSLuis R. Rodriguez return NULL; 6809c96477dSLuis R. Rodriguez 6819c96477dSLuis R. Rodriguez /* First we get a count of the rules we'll need, then we actually 6829c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 6839c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 6849c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 6859c96477dSLuis R. Rodriguez * All rules that do check out OK are valid. */ 6869c96477dSLuis R. Rodriguez 6879c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 6889c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 6899c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 6909c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 6919c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 6929c96477dSLuis R. Rodriguez intersected_rule)) 6939c96477dSLuis R. Rodriguez num_rules++; 6949c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 6959c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 6969c96477dSLuis R. Rodriguez } 6979c96477dSLuis R. Rodriguez } 6989c96477dSLuis R. Rodriguez 6999c96477dSLuis R. Rodriguez if (!num_rules) 7009c96477dSLuis R. Rodriguez return NULL; 7019c96477dSLuis R. Rodriguez 7029c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 7039c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 7049c96477dSLuis R. Rodriguez 7059c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 7069c96477dSLuis R. Rodriguez if (!rd) 7079c96477dSLuis R. Rodriguez return NULL; 7089c96477dSLuis R. Rodriguez 7099c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7109c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7119c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7129c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 7139c96477dSLuis R. Rodriguez /* This time around instead of using the stack lets 7149c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 7159c96477dSLuis R. Rodriguez * a memcpy() */ 7169c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 7179c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 7189c96477dSLuis R. Rodriguez intersected_rule); 7199c96477dSLuis R. Rodriguez /* No need to memset here the intersected rule here as 7209c96477dSLuis R. Rodriguez * we're not using the stack anymore */ 7219c96477dSLuis R. Rodriguez if (r) 7229c96477dSLuis R. Rodriguez continue; 7239c96477dSLuis R. Rodriguez rule_idx++; 7249c96477dSLuis R. Rodriguez } 7259c96477dSLuis R. Rodriguez } 7269c96477dSLuis R. Rodriguez 7279c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 7289c96477dSLuis R. Rodriguez kfree(rd); 7299c96477dSLuis R. Rodriguez return NULL; 7309c96477dSLuis R. Rodriguez } 7319c96477dSLuis R. Rodriguez 7329c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 7339c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 7349c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 7359c96477dSLuis R. Rodriguez 7369c96477dSLuis R. Rodriguez return rd; 7379c96477dSLuis R. Rodriguez } 7389c96477dSLuis R. Rodriguez 739b2e1b302SLuis R. Rodriguez /* XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 740b2e1b302SLuis R. Rodriguez * want to just have the channel structure use these */ 741b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 742b2e1b302SLuis R. Rodriguez { 743b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 744b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 745b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 746b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 747b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 748b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 749b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 750b2e1b302SLuis R. Rodriguez return channel_flags; 751b2e1b302SLuis R. Rodriguez } 752b2e1b302SLuis R. Rodriguez 7531fa25e41SLuis R. Rodriguez static int freq_reg_info_regd(struct wiphy *wiphy, 7541fa25e41SLuis R. Rodriguez u32 center_freq, 7551fa25e41SLuis R. Rodriguez u32 *bandwidth, 7561fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 7571fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *custom_regd) 7588318d78aSJohannes Berg { 7598318d78aSJohannes Berg int i; 7600c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 7613e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *regd; 762b2e1b302SLuis R. Rodriguez u32 max_bandwidth = 0; 7638318d78aSJohannes Berg 7641fa25e41SLuis R. Rodriguez regd = custom_regd ? custom_regd : cfg80211_regdomain; 7653e0c3ff3SLuis R. Rodriguez 7663e0c3ff3SLuis R. Rodriguez /* Follow the driver's regulatory domain, if present, unless a country 76724ed1da1SLuis R. Rodriguez * IE has been processed or a user wants to help complaince further */ 7683e0c3ff3SLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE && 76924ed1da1SLuis R. Rodriguez last_request->initiator != REGDOM_SET_BY_USER && 7703e0c3ff3SLuis R. Rodriguez wiphy->regd) 7713e0c3ff3SLuis R. Rodriguez regd = wiphy->regd; 7723e0c3ff3SLuis R. Rodriguez 7733e0c3ff3SLuis R. Rodriguez if (!regd) 774b2e1b302SLuis R. Rodriguez return -EINVAL; 775b2e1b302SLuis R. Rodriguez 7763e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 777b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 778b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 779b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 780b2e1b302SLuis R. Rodriguez 7813e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 782b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 783b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 7840c7dc45dSLuis R. Rodriguez 7850c7dc45dSLuis R. Rodriguez /* We only need to know if one frequency rule was 7860c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 7870c7dc45dSLuis R. Rodriguez * not overwrite it once found */ 7880c7dc45dSLuis R. Rodriguez if (!band_rule_found) 7890c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 7900c7dc45dSLuis R. Rodriguez 791b2e1b302SLuis R. Rodriguez max_bandwidth = freq_max_bandwidth(fr, center_freq); 7920c7dc45dSLuis R. Rodriguez 793b2e1b302SLuis R. Rodriguez if (max_bandwidth && *bandwidth <= max_bandwidth) { 794b2e1b302SLuis R. Rodriguez *reg_rule = rr; 795b2e1b302SLuis R. Rodriguez *bandwidth = max_bandwidth; 7968318d78aSJohannes Berg break; 7978318d78aSJohannes Berg } 7988318d78aSJohannes Berg } 7998318d78aSJohannes Berg 8000c7dc45dSLuis R. Rodriguez if (!band_rule_found) 8010c7dc45dSLuis R. Rodriguez return -ERANGE; 8020c7dc45dSLuis R. Rodriguez 803b2e1b302SLuis R. Rodriguez return !max_bandwidth; 804b2e1b302SLuis R. Rodriguez } 80534f57347SLuis R. Rodriguez EXPORT_SYMBOL(freq_reg_info); 806b2e1b302SLuis R. Rodriguez 80734f57347SLuis R. Rodriguez int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth, 8081fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 8091fa25e41SLuis R. Rodriguez { 8101fa25e41SLuis R. Rodriguez return freq_reg_info_regd(wiphy, center_freq, 8111fa25e41SLuis R. Rodriguez bandwidth, reg_rule, NULL); 8121fa25e41SLuis R. Rodriguez } 8131fa25e41SLuis R. Rodriguez 814a92a3ce7SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, 815a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 816b2e1b302SLuis R. Rodriguez { 817b2e1b302SLuis R. Rodriguez int r; 818a92a3ce7SLuis R. Rodriguez u32 flags; 819b2e1b302SLuis R. Rodriguez u32 max_bandwidth = 0; 820b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 821b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 822a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 823a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 824a92a3ce7SLuis R. Rodriguez 825a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 826a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 827a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 828a92a3ce7SLuis R. Rodriguez 829a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 830b2e1b302SLuis R. Rodriguez 8313e0c3ff3SLuis R. Rodriguez r = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq), 832b2e1b302SLuis R. Rodriguez &max_bandwidth, ®_rule); 833b2e1b302SLuis R. Rodriguez 834b2e1b302SLuis R. Rodriguez if (r) { 8350c7dc45dSLuis R. Rodriguez /* This means no regulatory rule was found in the country IE 8360c7dc45dSLuis R. Rodriguez * with a frequency range on the center_freq's band, since 8370c7dc45dSLuis R. Rodriguez * IEEE-802.11 allows for a country IE to have a subset of the 8380c7dc45dSLuis R. Rodriguez * regulatory information provided in a country we ignore 8390c7dc45dSLuis R. Rodriguez * disabling the channel unless at least one reg rule was 8400c7dc45dSLuis R. Rodriguez * found on the center_freq's band. For details see this 8410c7dc45dSLuis R. Rodriguez * clarification: 8420c7dc45dSLuis R. Rodriguez * 8430c7dc45dSLuis R. Rodriguez * http://tinyurl.com/11d-clarification 8440c7dc45dSLuis R. Rodriguez */ 8450c7dc45dSLuis R. Rodriguez if (r == -ERANGE && 8460c7dc45dSLuis R. Rodriguez last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { 8470c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 8480c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Leaving channel %d MHz " 8490c7dc45dSLuis R. Rodriguez "intact on %s - no rule found in band on " 8500c7dc45dSLuis R. Rodriguez "Country IE\n", 8510c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 8520c7dc45dSLuis R. Rodriguez #endif 8530c7dc45dSLuis R. Rodriguez } else { 8540c7dc45dSLuis R. Rodriguez /* In this case we know the country IE has at least one reg rule 8550c7dc45dSLuis R. Rodriguez * for the band so we respect its band definitions */ 8560c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 8570c7dc45dSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) 8580c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Disabling " 8590c7dc45dSLuis R. Rodriguez "channel %d MHz on %s due to " 8600c7dc45dSLuis R. Rodriguez "Country IE\n", 8610c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 8620c7dc45dSLuis R. Rodriguez #endif 8638318d78aSJohannes Berg flags |= IEEE80211_CHAN_DISABLED; 8648318d78aSJohannes Berg chan->flags = flags; 8650c7dc45dSLuis R. Rodriguez } 8668318d78aSJohannes Berg return; 8678318d78aSJohannes Berg } 8688318d78aSJohannes Berg 869b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 870b2e1b302SLuis R. Rodriguez 871f976376dSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_DRIVER && 872f976376dSLuis R. Rodriguez last_request->wiphy && last_request->wiphy == wiphy && 873f976376dSLuis R. Rodriguez last_request->wiphy->strict_regulatory) { 874f976376dSLuis R. Rodriguez /* This gaurantees the driver's requested regulatory domain 875f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 876f976376dSLuis R. Rodriguez * settings */ 877f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 878f976376dSLuis R. Rodriguez map_regdom_flags(reg_rule->flags); 879f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 880f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 881f976376dSLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); 882f976376dSLuis R. Rodriguez chan->max_power = chan->orig_mpwr = 883f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 884f976376dSLuis R. Rodriguez return; 885f976376dSLuis R. Rodriguez } 886f976376dSLuis R. Rodriguez 887b2e1b302SLuis R. Rodriguez chan->flags = flags | map_regdom_flags(reg_rule->flags); 8888318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 889b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 890b2e1b302SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); 891253898c4SJohn W. Linville if (chan->orig_mpwr) 892b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 893b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 894253898c4SJohn W. Linville else 895b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 8968318d78aSJohannes Berg } 8978318d78aSJohannes Berg 898a92a3ce7SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) 8998318d78aSJohannes Berg { 900a92a3ce7SLuis R. Rodriguez unsigned int i; 901a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 902a92a3ce7SLuis R. Rodriguez 903a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 904a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 9058318d78aSJohannes Berg 9068318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 907a92a3ce7SLuis R. Rodriguez handle_channel(wiphy, band, i); 9088318d78aSJohannes Berg } 9098318d78aSJohannes Berg 91014b9815aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, enum reg_set_by setby) 91114b9815aSLuis R. Rodriguez { 91214b9815aSLuis R. Rodriguez if (!last_request) 91314b9815aSLuis R. Rodriguez return true; 91414b9815aSLuis R. Rodriguez if (setby == REGDOM_SET_BY_CORE && 9152a44f911SLuis R. Rodriguez wiphy->custom_regulatory) 91614b9815aSLuis R. Rodriguez return true; 917f976376dSLuis R. Rodriguez /* wiphy->regd will be set once the device has its own 918f976376dSLuis R. Rodriguez * desired regulatory domain set */ 919f976376dSLuis R. Rodriguez if (wiphy->strict_regulatory && !wiphy->regd && 920f976376dSLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) 921f976376dSLuis R. Rodriguez return true; 92214b9815aSLuis R. Rodriguez return false; 92314b9815aSLuis R. Rodriguez } 92414b9815aSLuis R. Rodriguez 925b2e1b302SLuis R. Rodriguez static void update_all_wiphy_regulatory(enum reg_set_by setby) 926b2e1b302SLuis R. Rodriguez { 927b2e1b302SLuis R. Rodriguez struct cfg80211_registered_device *drv; 928b2e1b302SLuis R. Rodriguez 929b2e1b302SLuis R. Rodriguez list_for_each_entry(drv, &cfg80211_drv_list, list) 930b2e1b302SLuis R. Rodriguez wiphy_update_regulatory(&drv->wiphy, setby); 931b2e1b302SLuis R. Rodriguez } 932b2e1b302SLuis R. Rodriguez 933b2e1b302SLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby) 9348318d78aSJohannes Berg { 9358318d78aSJohannes Berg enum ieee80211_band band; 936d46e5b1dSLuis R. Rodriguez 937d46e5b1dSLuis R. Rodriguez if (ignore_reg_update(wiphy, setby)) 938d46e5b1dSLuis R. Rodriguez return; 939b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 9408318d78aSJohannes Berg if (wiphy->bands[band]) 941a92a3ce7SLuis R. Rodriguez handle_band(wiphy, band); 942560e28e1SLuis R. Rodriguez } 943b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 944716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 945b2e1b302SLuis R. Rodriguez } 946b2e1b302SLuis R. Rodriguez 9471fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 9481fa25e41SLuis R. Rodriguez enum ieee80211_band band, 9491fa25e41SLuis R. Rodriguez unsigned int chan_idx, 9501fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 9511fa25e41SLuis R. Rodriguez { 9521fa25e41SLuis R. Rodriguez int r; 9531fa25e41SLuis R. Rodriguez u32 max_bandwidth = 0; 9541fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 9551fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 9561fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 9571fa25e41SLuis R. Rodriguez struct ieee80211_channel *chan; 9581fa25e41SLuis R. Rodriguez 9591fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 9601fa25e41SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 9611fa25e41SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 9621fa25e41SLuis R. Rodriguez 9631fa25e41SLuis R. Rodriguez r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), 9641fa25e41SLuis R. Rodriguez &max_bandwidth, ®_rule, regd); 9651fa25e41SLuis R. Rodriguez 9661fa25e41SLuis R. Rodriguez if (r) { 9671fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 9681fa25e41SLuis R. Rodriguez return; 9691fa25e41SLuis R. Rodriguez } 9701fa25e41SLuis R. Rodriguez 9711fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 9721fa25e41SLuis R. Rodriguez 9731fa25e41SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags); 9741fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 9751fa25e41SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); 9761fa25e41SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 9771fa25e41SLuis R. Rodriguez } 9781fa25e41SLuis R. Rodriguez 9791fa25e41SLuis R. Rodriguez static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, 9801fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 9811fa25e41SLuis R. Rodriguez { 9821fa25e41SLuis R. Rodriguez unsigned int i; 9831fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 9841fa25e41SLuis R. Rodriguez 9851fa25e41SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 9861fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 9871fa25e41SLuis R. Rodriguez 9881fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 9891fa25e41SLuis R. Rodriguez handle_channel_custom(wiphy, band, i, regd); 9901fa25e41SLuis R. Rodriguez } 9911fa25e41SLuis R. Rodriguez 9921fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 9931fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 9941fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 9951fa25e41SLuis R. Rodriguez { 9961fa25e41SLuis R. Rodriguez enum ieee80211_band band; 9971fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 9981fa25e41SLuis R. Rodriguez if (wiphy->bands[band]) 9991fa25e41SLuis R. Rodriguez handle_band_custom(wiphy, band, regd); 10001fa25e41SLuis R. Rodriguez } 10011fa25e41SLuis R. Rodriguez } 10021fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 10031fa25e41SLuis R. Rodriguez 10043e0c3ff3SLuis R. Rodriguez static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, 10053e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *src_regd) 10063e0c3ff3SLuis R. Rodriguez { 10073e0c3ff3SLuis R. Rodriguez struct ieee80211_regdomain *regd; 10083e0c3ff3SLuis R. Rodriguez int size_of_regd = 0; 10093e0c3ff3SLuis R. Rodriguez unsigned int i; 10103e0c3ff3SLuis R. Rodriguez 10113e0c3ff3SLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 10123e0c3ff3SLuis R. Rodriguez ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); 10133e0c3ff3SLuis R. Rodriguez 10143e0c3ff3SLuis R. Rodriguez regd = kzalloc(size_of_regd, GFP_KERNEL); 10153e0c3ff3SLuis R. Rodriguez if (!regd) 10163e0c3ff3SLuis R. Rodriguez return -ENOMEM; 10173e0c3ff3SLuis R. Rodriguez 10183e0c3ff3SLuis R. Rodriguez memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 10193e0c3ff3SLuis R. Rodriguez 10203e0c3ff3SLuis R. Rodriguez for (i = 0; i < src_regd->n_reg_rules; i++) 10213e0c3ff3SLuis R. Rodriguez memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 10223e0c3ff3SLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 10233e0c3ff3SLuis R. Rodriguez 10243e0c3ff3SLuis R. Rodriguez *dst_regd = regd; 10253e0c3ff3SLuis R. Rodriguez return 0; 10263e0c3ff3SLuis R. Rodriguez } 10273e0c3ff3SLuis R. Rodriguez 10289c96477dSLuis R. Rodriguez /* Return value which can be used by ignore_request() to indicate 10299c96477dSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains */ 10309c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 10319c96477dSLuis R. Rodriguez 103284fa4f43SJohannes Berg /* This has the logic which determines when a new request 103384fa4f43SJohannes Berg * should be ignored. */ 103484fa4f43SJohannes Berg static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by, 103584fa4f43SJohannes Berg const char *alpha2) 103684fa4f43SJohannes Berg { 103784fa4f43SJohannes Berg /* All initial requests are respected */ 103884fa4f43SJohannes Berg if (!last_request) 103984fa4f43SJohannes Berg return 0; 104084fa4f43SJohannes Berg 104184fa4f43SJohannes Berg switch (set_by) { 104284fa4f43SJohannes Berg case REGDOM_SET_BY_INIT: 104384fa4f43SJohannes Berg return -EINVAL; 104484fa4f43SJohannes Berg case REGDOM_SET_BY_CORE: 104584fa4f43SJohannes Berg /* 104684fa4f43SJohannes Berg * Always respect new wireless core hints, should only happen 104784fa4f43SJohannes Berg * when updating the world regulatory domain at init. 104884fa4f43SJohannes Berg */ 104984fa4f43SJohannes Berg return 0; 105084fa4f43SJohannes Berg case REGDOM_SET_BY_COUNTRY_IE: 105184fa4f43SJohannes Berg if (unlikely(!is_an_alpha2(alpha2))) 105284fa4f43SJohannes Berg return -EINVAL; 105384fa4f43SJohannes Berg if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { 105484fa4f43SJohannes Berg if (last_request->wiphy != wiphy) { 105584fa4f43SJohannes Berg /* 105684fa4f43SJohannes Berg * Two cards with two APs claiming different 105784fa4f43SJohannes Berg * different Country IE alpha2s. We could 105884fa4f43SJohannes Berg * intersect them, but that seems unlikely 105984fa4f43SJohannes Berg * to be correct. Reject second one for now. 106084fa4f43SJohannes Berg */ 106184fa4f43SJohannes Berg if (!alpha2_equal(alpha2, 106284fa4f43SJohannes Berg cfg80211_regdomain->alpha2)) 106384fa4f43SJohannes Berg return -EOPNOTSUPP; 106484fa4f43SJohannes Berg return -EALREADY; 106584fa4f43SJohannes Berg } 10663f2355cbSLuis R. Rodriguez /* Two consecutive Country IE hints on the same wiphy. 10673f2355cbSLuis R. Rodriguez * This should be picked up early by the driver/stack */ 10683f2355cbSLuis R. Rodriguez if (WARN_ON(!alpha2_equal(cfg80211_regdomain->alpha2, 10693f2355cbSLuis R. Rodriguez alpha2))) 107084fa4f43SJohannes Berg return 0; 107184fa4f43SJohannes Berg return -EALREADY; 107284fa4f43SJohannes Berg } 10733f2355cbSLuis R. Rodriguez return REG_INTERSECT; 107484fa4f43SJohannes Berg case REGDOM_SET_BY_DRIVER: 1075e74b1e7fSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_CORE) { 1076e74b1e7fSLuis R. Rodriguez if (is_old_static_regdom(cfg80211_regdomain)) 107784fa4f43SJohannes Berg return 0; 1078e74b1e7fSLuis R. Rodriguez if (!alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 1079e74b1e7fSLuis R. Rodriguez return 0; 1080e74b1e7fSLuis R. Rodriguez return -EALREADY; 1081e74b1e7fSLuis R. Rodriguez } 10823e0c3ff3SLuis R. Rodriguez return REG_INTERSECT; 108384fa4f43SJohannes Berg case REGDOM_SET_BY_USER: 108484fa4f43SJohannes Berg if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) 10859c96477dSLuis R. Rodriguez return REG_INTERSECT; 10863f2355cbSLuis R. Rodriguez /* If the user knows better the user should set the regdom 10873f2355cbSLuis R. Rodriguez * to their country before the IE is picked up */ 10883f2355cbSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_USER && 10893f2355cbSLuis R. Rodriguez last_request->intersect) 10903f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 10915eebade6SLuis R. Rodriguez /* Process user requests only after previous user/driver/core 10925eebade6SLuis R. Rodriguez * requests have been processed */ 10935eebade6SLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_CORE || 10945eebade6SLuis R. Rodriguez last_request->initiator == REGDOM_SET_BY_DRIVER || 10955eebade6SLuis R. Rodriguez last_request->initiator == REGDOM_SET_BY_USER) { 10965eebade6SLuis R. Rodriguez if (!alpha2_equal(last_request->alpha2, 10975eebade6SLuis R. Rodriguez cfg80211_regdomain->alpha2)) 10985eebade6SLuis R. Rodriguez return -EAGAIN; 10995eebade6SLuis R. Rodriguez } 11005eebade6SLuis R. Rodriguez 1101e74b1e7fSLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 1102e74b1e7fSLuis R. Rodriguez alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 1103e74b1e7fSLuis R. Rodriguez return -EALREADY; 1104e74b1e7fSLuis R. Rodriguez 110584fa4f43SJohannes Berg return 0; 110684fa4f43SJohannes Berg } 110784fa4f43SJohannes Berg 110884fa4f43SJohannes Berg return -EINVAL; 110984fa4f43SJohannes Berg } 111084fa4f43SJohannes Berg 1111b2e1b302SLuis R. Rodriguez /* Caller must hold &cfg80211_drv_mutex */ 1112b2e1b302SLuis R. Rodriguez int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by, 11133f2355cbSLuis R. Rodriguez const char *alpha2, 11143f2355cbSLuis R. Rodriguez u32 country_ie_checksum, 11153f2355cbSLuis R. Rodriguez enum environment_cap env) 1116b2e1b302SLuis R. Rodriguez { 1117b2e1b302SLuis R. Rodriguez struct regulatory_request *request; 11189c96477dSLuis R. Rodriguez bool intersect = false; 1119b2e1b302SLuis R. Rodriguez int r = 0; 1120b2e1b302SLuis R. Rodriguez 1121be3d4810SJohannes Berg r = ignore_request(wiphy, set_by, alpha2); 11229c96477dSLuis R. Rodriguez 11233e0c3ff3SLuis R. Rodriguez if (r == REG_INTERSECT) { 11243e0c3ff3SLuis R. Rodriguez if (set_by == REGDOM_SET_BY_DRIVER) { 11253e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 11263e0c3ff3SLuis R. Rodriguez if (r) 1127b2e1b302SLuis R. Rodriguez return r; 11283e0c3ff3SLuis R. Rodriguez } 11293e0c3ff3SLuis R. Rodriguez intersect = true; 11303e0c3ff3SLuis R. Rodriguez } else if (r) { 11313e0c3ff3SLuis R. Rodriguez /* If the regulatory domain being requested by the 11323e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 11333e0c3ff3SLuis R. Rodriguez * wiphy */ 11343e0c3ff3SLuis R. Rodriguez if (r == -EALREADY && set_by == REGDOM_SET_BY_DRIVER) { 11353e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 11363e0c3ff3SLuis R. Rodriguez if (r) 11373e0c3ff3SLuis R. Rodriguez return r; 11383e0c3ff3SLuis R. Rodriguez r = -EALREADY; 11393e0c3ff3SLuis R. Rodriguez goto new_request; 11403e0c3ff3SLuis R. Rodriguez } 11413e0c3ff3SLuis R. Rodriguez return r; 11423e0c3ff3SLuis R. Rodriguez } 1143b2e1b302SLuis R. Rodriguez 11443e0c3ff3SLuis R. Rodriguez new_request: 1145b2e1b302SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1146b2e1b302SLuis R. Rodriguez GFP_KERNEL); 1147b2e1b302SLuis R. Rodriguez if (!request) 1148b2e1b302SLuis R. Rodriguez return -ENOMEM; 1149b2e1b302SLuis R. Rodriguez 1150be3d4810SJohannes Berg request->alpha2[0] = alpha2[0]; 1151be3d4810SJohannes Berg request->alpha2[1] = alpha2[1]; 1152b2e1b302SLuis R. Rodriguez request->initiator = set_by; 1153b2e1b302SLuis R. Rodriguez request->wiphy = wiphy; 11549c96477dSLuis R. Rodriguez request->intersect = intersect; 11553f2355cbSLuis R. Rodriguez request->country_ie_checksum = country_ie_checksum; 11563f2355cbSLuis R. Rodriguez request->country_ie_env = env; 1157b2e1b302SLuis R. Rodriguez 1158f6037d09SJohannes Berg kfree(last_request); 1159f6037d09SJohannes Berg last_request = request; 11603e0c3ff3SLuis R. Rodriguez 11613e0c3ff3SLuis R. Rodriguez /* When r == REG_INTERSECT we do need to call CRDA */ 11623e0c3ff3SLuis R. Rodriguez if (r < 0) 11633e0c3ff3SLuis R. Rodriguez return r; 11643e0c3ff3SLuis R. Rodriguez 11653f2355cbSLuis R. Rodriguez /* 11663f2355cbSLuis R. Rodriguez * Note: When CONFIG_WIRELESS_OLD_REGULATORY is enabled 11673f2355cbSLuis R. Rodriguez * AND if CRDA is NOT present nothing will happen, if someone 11683f2355cbSLuis R. Rodriguez * wants to bother with 11d with OLD_REG you can add a timer. 11693f2355cbSLuis R. Rodriguez * If after x amount of time nothing happens you can call: 11703f2355cbSLuis R. Rodriguez * 11713f2355cbSLuis R. Rodriguez * return set_regdom(country_ie_regdomain); 11723f2355cbSLuis R. Rodriguez * 11733f2355cbSLuis R. Rodriguez * to intersect with the static rd 11743f2355cbSLuis R. Rodriguez */ 117502ba0b32SLuis R. Rodriguez return call_crda(alpha2); 1176b2e1b302SLuis R. Rodriguez } 1177b2e1b302SLuis R. Rodriguez 1178be3d4810SJohannes Berg void regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1179b2e1b302SLuis R. Rodriguez { 1180f976376dSLuis R. Rodriguez int r; 1181be3d4810SJohannes Berg BUG_ON(!alpha2); 1182b2e1b302SLuis R. Rodriguez 1183b2e1b302SLuis R. Rodriguez mutex_lock(&cfg80211_drv_mutex); 1184f976376dSLuis R. Rodriguez r = __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, 1185f976376dSLuis R. Rodriguez alpha2, 0, ENVIRON_ANY); 1186f976376dSLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 1187f976376dSLuis R. Rodriguez if (r == -EALREADY && wiphy->strict_regulatory) 1188f976376dSLuis R. Rodriguez wiphy_update_regulatory(wiphy, REGDOM_SET_BY_DRIVER); 1189b2e1b302SLuis R. Rodriguez mutex_unlock(&cfg80211_drv_mutex); 1190b2e1b302SLuis R. Rodriguez } 1191b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1192b2e1b302SLuis R. Rodriguez 11933f2355cbSLuis R. Rodriguez static bool reg_same_country_ie_hint(struct wiphy *wiphy, 11943f2355cbSLuis R. Rodriguez u32 country_ie_checksum) 11953f2355cbSLuis R. Rodriguez { 11963f2355cbSLuis R. Rodriguez if (!last_request->wiphy) 11973f2355cbSLuis R. Rodriguez return false; 11983f2355cbSLuis R. Rodriguez if (likely(last_request->wiphy != wiphy)) 11993f2355cbSLuis R. Rodriguez return !country_ie_integrity_changes(country_ie_checksum); 12003f2355cbSLuis R. Rodriguez /* We should not have let these through at this point, they 12013f2355cbSLuis R. Rodriguez * should have been picked up earlier by the first alpha2 check 12023f2355cbSLuis R. Rodriguez * on the device */ 12033f2355cbSLuis R. Rodriguez if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) 12043f2355cbSLuis R. Rodriguez return true; 12053f2355cbSLuis R. Rodriguez return false; 12063f2355cbSLuis R. Rodriguez } 12073f2355cbSLuis R. Rodriguez 12083f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 12093f2355cbSLuis R. Rodriguez u8 *country_ie, 12103f2355cbSLuis R. Rodriguez u8 country_ie_len) 12113f2355cbSLuis R. Rodriguez { 12123f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 12133f2355cbSLuis R. Rodriguez char alpha2[2]; 12143f2355cbSLuis R. Rodriguez u32 checksum = 0; 12153f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 12163f2355cbSLuis R. Rodriguez 12170f70f398SJohannes Berg if (!last_request) 12180f70f398SJohannes Berg return; 12190f70f398SJohannes Berg 12203f2355cbSLuis R. Rodriguez mutex_lock(&cfg80211_drv_mutex); 12213f2355cbSLuis R. Rodriguez 12223f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 12233f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 12243f2355cbSLuis R. Rodriguez goto out; 12253f2355cbSLuis R. Rodriguez 12263f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 12273f2355cbSLuis R. Rodriguez goto out; 12283f2355cbSLuis R. Rodriguez 12293f2355cbSLuis R. Rodriguez /* Pending country IE processing, this can happen after we 12303f2355cbSLuis R. Rodriguez * call CRDA and wait for a response if a beacon was received before 12313f2355cbSLuis R. Rodriguez * we were able to process the last regulatory_hint_11d() call */ 12323f2355cbSLuis R. Rodriguez if (country_ie_regdomain) 12333f2355cbSLuis R. Rodriguez goto out; 12343f2355cbSLuis R. Rodriguez 12353f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 12363f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 12373f2355cbSLuis R. Rodriguez 12383f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 12393f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 12403f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 12413f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 12423f2355cbSLuis R. Rodriguez 12433f2355cbSLuis R. Rodriguez /* We will run this for *every* beacon processed for the BSSID, so 12443f2355cbSLuis R. Rodriguez * we optimize an early check to exit out early if we don't have to 12453f2355cbSLuis R. Rodriguez * do anything */ 12463f2355cbSLuis R. Rodriguez if (likely(last_request->wiphy)) { 12473f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv_last_ie; 12483f2355cbSLuis R. Rodriguez 12493f2355cbSLuis R. Rodriguez drv_last_ie = wiphy_to_dev(last_request->wiphy); 12503f2355cbSLuis R. Rodriguez 12513f2355cbSLuis R. Rodriguez /* Lets keep this simple -- we trust the first AP 12523f2355cbSLuis R. Rodriguez * after we intersect with CRDA */ 12533f2355cbSLuis R. Rodriguez if (likely(last_request->wiphy == wiphy)) { 12543f2355cbSLuis R. Rodriguez /* Ignore IEs coming in on this wiphy with 12553f2355cbSLuis R. Rodriguez * the same alpha2 and environment cap */ 12563f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 12573f2355cbSLuis R. Rodriguez alpha2) && 12583f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 12593f2355cbSLuis R. Rodriguez goto out; 12603f2355cbSLuis R. Rodriguez } 12613f2355cbSLuis R. Rodriguez /* the wiphy moved on to another BSSID or the AP 12623f2355cbSLuis R. Rodriguez * was reconfigured. XXX: We need to deal with the 12633f2355cbSLuis R. Rodriguez * case where the user suspends and goes to goes 12643f2355cbSLuis R. Rodriguez * to another country, and then gets IEs from an 12653f2355cbSLuis R. Rodriguez * AP with different settings */ 12663f2355cbSLuis R. Rodriguez goto out; 12673f2355cbSLuis R. Rodriguez } else { 12683f2355cbSLuis R. Rodriguez /* Ignore IEs coming in on two separate wiphys with 12693f2355cbSLuis R. Rodriguez * the same alpha2 and environment cap */ 12703f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 12713f2355cbSLuis R. Rodriguez alpha2) && 12723f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 12733f2355cbSLuis R. Rodriguez goto out; 12743f2355cbSLuis R. Rodriguez } 12753f2355cbSLuis R. Rodriguez /* We could potentially intersect though */ 12763f2355cbSLuis R. Rodriguez goto out; 12773f2355cbSLuis R. Rodriguez } 12783f2355cbSLuis R. Rodriguez } 12793f2355cbSLuis R. Rodriguez 12803f2355cbSLuis R. Rodriguez rd = country_ie_2_rd(country_ie, country_ie_len, &checksum); 12813f2355cbSLuis R. Rodriguez if (!rd) 12823f2355cbSLuis R. Rodriguez goto out; 12833f2355cbSLuis R. Rodriguez 12843f2355cbSLuis R. Rodriguez /* This will not happen right now but we leave it here for the 12853f2355cbSLuis R. Rodriguez * the future when we want to add suspend/resume support and having 12863f2355cbSLuis R. Rodriguez * the user move to another country after doing so, or having the user 12873f2355cbSLuis R. Rodriguez * move to another AP. Right now we just trust the first AP. This is why 12883f2355cbSLuis R. Rodriguez * this is marked as likley(). If we hit this before we add this support 12893f2355cbSLuis R. Rodriguez * we want to be informed of it as it would indicate a mistake in the 12903f2355cbSLuis R. Rodriguez * current design */ 12913f2355cbSLuis R. Rodriguez if (likely(WARN_ON(reg_same_country_ie_hint(wiphy, checksum)))) 12923f2355cbSLuis R. Rodriguez goto out; 12933f2355cbSLuis R. Rodriguez 12943f2355cbSLuis R. Rodriguez /* We keep this around for when CRDA comes back with a response so 12953f2355cbSLuis R. Rodriguez * we can intersect with that */ 12963f2355cbSLuis R. Rodriguez country_ie_regdomain = rd; 12973f2355cbSLuis R. Rodriguez 12983f2355cbSLuis R. Rodriguez __regulatory_hint(wiphy, REGDOM_SET_BY_COUNTRY_IE, 12993f2355cbSLuis R. Rodriguez country_ie_regdomain->alpha2, checksum, env); 13003f2355cbSLuis R. Rodriguez 13013f2355cbSLuis R. Rodriguez out: 13023f2355cbSLuis R. Rodriguez mutex_unlock(&cfg80211_drv_mutex); 13033f2355cbSLuis R. Rodriguez } 13043f2355cbSLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint_11d); 1305b2e1b302SLuis R. Rodriguez 1306a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1307b2e1b302SLuis R. Rodriguez { 1308b2e1b302SLuis R. Rodriguez unsigned int i; 1309a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1310a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1311a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1312b2e1b302SLuis R. Rodriguez 1313b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), " 1314b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 1315b2e1b302SLuis R. Rodriguez 1316b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1317b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1318b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1319b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1320b2e1b302SLuis R. Rodriguez 1321b2e1b302SLuis R. Rodriguez /* There may not be documentation for max antenna gain 1322b2e1b302SLuis R. Rodriguez * in certain regions */ 1323b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1324b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1325b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 1326b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1327b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1328b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1329b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1330b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1331b2e1b302SLuis R. Rodriguez else 1332b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1333b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 1334b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1335b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1336b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1337b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1338b2e1b302SLuis R. Rodriguez } 1339b2e1b302SLuis R. Rodriguez } 1340b2e1b302SLuis R. Rodriguez 1341a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 1342b2e1b302SLuis R. Rodriguez { 1343b2e1b302SLuis R. Rodriguez 13443f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 13453f2355cbSLuis R. Rodriguez struct wiphy *wiphy = NULL; 13463f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv; 13473f2355cbSLuis R. Rodriguez 13483f2355cbSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { 13493f2355cbSLuis R. Rodriguez if (last_request->wiphy) { 13503f2355cbSLuis R. Rodriguez wiphy = last_request->wiphy; 13513f2355cbSLuis R. Rodriguez drv = wiphy_to_dev(wiphy); 13523f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 13533f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 13543f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0], 13553f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1]); 13563f2355cbSLuis R. Rodriguez } else 13573f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 13583f2355cbSLuis R. Rodriguez "domain intersected: \n"); 13593f2355cbSLuis R. Rodriguez } else 13603f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 1361039498c6SLuis R. Rodriguez "domain intersected: \n"); 13623f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 1363b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 1364b2e1b302SLuis R. Rodriguez "domain updated:\n"); 1365b2e1b302SLuis R. Rodriguez else { 1366b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 1367b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1368b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 1369b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 1370b2e1b302SLuis R. Rodriguez else 1371b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1372b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 1373b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1374b2e1b302SLuis R. Rodriguez } 1375b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1376b2e1b302SLuis R. Rodriguez } 1377b2e1b302SLuis R. Rodriguez 13782df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 1379b2e1b302SLuis R. Rodriguez { 1380b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 1381b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1382b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1383b2e1b302SLuis R. Rodriguez } 1384b2e1b302SLuis R. Rodriguez 13853f2355cbSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 13863f2355cbSLuis R. Rodriguez static void reg_country_ie_process_debug( 13873f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 13883f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 13893f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 13903f2355cbSLuis R. Rodriguez { 13913f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Received country IE:\n"); 13923f2355cbSLuis R. Rodriguez print_regdomain_info(country_ie_regdomain); 13933f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); 13943f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 13953f2355cbSLuis R. Rodriguez if (intersected_rd) { 13963f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: We intersect both of these " 13973f2355cbSLuis R. Rodriguez "and get:\n"); 13983f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 13993f2355cbSLuis R. Rodriguez return; 14003f2355cbSLuis R. Rodriguez } 14013f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); 14023f2355cbSLuis R. Rodriguez } 14033f2355cbSLuis R. Rodriguez #else 14043f2355cbSLuis R. Rodriguez static inline void reg_country_ie_process_debug( 14053f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 14063f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 14073f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 14083f2355cbSLuis R. Rodriguez { 14093f2355cbSLuis R. Rodriguez } 14103f2355cbSLuis R. Rodriguez #endif 14113f2355cbSLuis R. Rodriguez 1412d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 1413a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 1414b2e1b302SLuis R. Rodriguez { 14159c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 14163f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv = NULL; 14173f2355cbSLuis R. Rodriguez struct wiphy *wiphy = NULL; 1418b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 1419b2e1b302SLuis R. Rodriguez 1420b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 1421f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1422b2e1b302SLuis R. Rodriguez return -EINVAL; 1423b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 1424b2e1b302SLuis R. Rodriguez return 0; 1425b2e1b302SLuis R. Rodriguez } 1426b2e1b302SLuis R. Rodriguez 1427b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 1428b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 1429b2e1b302SLuis R. Rodriguez return -EINVAL; 1430b2e1b302SLuis R. Rodriguez 1431f6037d09SJohannes Berg if (!last_request) 1432b2e1b302SLuis R. Rodriguez return -EINVAL; 1433b2e1b302SLuis R. Rodriguez 14343f2355cbSLuis R. Rodriguez /* Lets only bother proceeding on the same alpha2 if the current 14353f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 14363f2355cbSLuis R. Rodriguez * and the pending request came in from a country IE */ 14373f2355cbSLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) { 14383f2355cbSLuis R. Rodriguez /* If someone else asked us to change the rd lets only bother 14393f2355cbSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called */ 1440b2e1b302SLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 1441b2e1b302SLuis R. Rodriguez !regdom_changed(rd->alpha2)) 1442b2e1b302SLuis R. Rodriguez return -EINVAL; 14433f2355cbSLuis R. Rodriguez } 14443f2355cbSLuis R. Rodriguez 14453f2355cbSLuis R. Rodriguez wiphy = last_request->wiphy; 1446b2e1b302SLuis R. Rodriguez 1447b2e1b302SLuis R. Rodriguez /* Now lets set the regulatory domain, update all driver channels 1448b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 1449b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 1450b2e1b302SLuis R. Rodriguez * internal EEPROM data */ 1451b2e1b302SLuis R. Rodriguez 1452f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1453b2e1b302SLuis R. Rodriguez return -EINVAL; 1454b2e1b302SLuis R. Rodriguez 1455b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 1456b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 1457b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 1458b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 1459b2e1b302SLuis R. Rodriguez return -EINVAL; 1460b2e1b302SLuis R. Rodriguez } 1461b2e1b302SLuis R. Rodriguez 1462b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 14633e0c3ff3SLuis R. Rodriguez int r; 14643e0c3ff3SLuis R. Rodriguez 14653e0c3ff3SLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_DRIVER) { 14663e0c3ff3SLuis R. Rodriguez reset_regdomains(); 14673e0c3ff3SLuis R. Rodriguez cfg80211_regdomain = rd; 14683e0c3ff3SLuis R. Rodriguez return 0; 14693e0c3ff3SLuis R. Rodriguez } 14703e0c3ff3SLuis R. Rodriguez 14713e0c3ff3SLuis R. Rodriguez /* For a driver hint, lets copy the regulatory domain the 14723e0c3ff3SLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts */ 14733e0c3ff3SLuis R. Rodriguez 14743e0c3ff3SLuis R. Rodriguez BUG_ON(last_request->wiphy->regd); 14753e0c3ff3SLuis R. Rodriguez 14763e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&last_request->wiphy->regd, rd); 14773e0c3ff3SLuis R. Rodriguez if (r) 14783e0c3ff3SLuis R. Rodriguez return r; 14793e0c3ff3SLuis R. Rodriguez 1480b8295acdSLuis R. Rodriguez reset_regdomains(); 1481b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 1482b8295acdSLuis R. Rodriguez return 0; 1483b8295acdSLuis R. Rodriguez } 1484b8295acdSLuis R. Rodriguez 1485b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 1486b8295acdSLuis R. Rodriguez 1487b8295acdSLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) { 1488b8295acdSLuis R. Rodriguez 14899c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 14909c96477dSLuis R. Rodriguez if (!intersected_rd) 14919c96477dSLuis R. Rodriguez return -EINVAL; 1492b8295acdSLuis R. Rodriguez 14933e0c3ff3SLuis R. Rodriguez /* We can trash what CRDA provided now. 14943e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 14953e0c3ff3SLuis R. Rodriguez * domain we keep it for its private use */ 14963e0c3ff3SLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_DRIVER) 14973e0c3ff3SLuis R. Rodriguez last_request->wiphy->regd = rd; 14983e0c3ff3SLuis R. Rodriguez else 14999c96477dSLuis R. Rodriguez kfree(rd); 15003e0c3ff3SLuis R. Rodriguez 1501b8295acdSLuis R. Rodriguez rd = NULL; 1502b8295acdSLuis R. Rodriguez 1503b8295acdSLuis R. Rodriguez reset_regdomains(); 1504b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 1505b8295acdSLuis R. Rodriguez 1506b8295acdSLuis R. Rodriguez return 0; 15079c96477dSLuis R. Rodriguez } 15089c96477dSLuis R. Rodriguez 15093f2355cbSLuis R. Rodriguez /* 15103f2355cbSLuis R. Rodriguez * Country IE requests are handled a bit differently, we intersect 15113f2355cbSLuis R. Rodriguez * the country IE rd with what CRDA believes that country should have 15123f2355cbSLuis R. Rodriguez */ 15133f2355cbSLuis R. Rodriguez 15143f2355cbSLuis R. Rodriguez BUG_ON(!country_ie_regdomain); 15153f2355cbSLuis R. Rodriguez 15163f2355cbSLuis R. Rodriguez if (rd != country_ie_regdomain) { 15173f2355cbSLuis R. Rodriguez /* Intersect what CRDA returned and our what we 15183f2355cbSLuis R. Rodriguez * had built from the Country IE received */ 15193f2355cbSLuis R. Rodriguez 15203f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, country_ie_regdomain); 15213f2355cbSLuis R. Rodriguez 15223f2355cbSLuis R. Rodriguez reg_country_ie_process_debug(rd, country_ie_regdomain, 15233f2355cbSLuis R. Rodriguez intersected_rd); 15243f2355cbSLuis R. Rodriguez 15253f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 15263f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 15273f2355cbSLuis R. Rodriguez } else { 15283f2355cbSLuis R. Rodriguez /* This would happen when CRDA was not present and 15293f2355cbSLuis R. Rodriguez * OLD_REGULATORY was enabled. We intersect our Country 15303f2355cbSLuis R. Rodriguez * IE rd and what was set on cfg80211 originally */ 15313f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 15323f2355cbSLuis R. Rodriguez } 15333f2355cbSLuis R. Rodriguez 15343f2355cbSLuis R. Rodriguez if (!intersected_rd) 15353f2355cbSLuis R. Rodriguez return -EINVAL; 15363f2355cbSLuis R. Rodriguez 15373f2355cbSLuis R. Rodriguez drv = wiphy_to_dev(wiphy); 15383f2355cbSLuis R. Rodriguez 15393f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0] = rd->alpha2[0]; 15403f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1] = rd->alpha2[1]; 15413f2355cbSLuis R. Rodriguez drv->env = last_request->country_ie_env; 15423f2355cbSLuis R. Rodriguez 15433f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 15443f2355cbSLuis R. Rodriguez 15453f2355cbSLuis R. Rodriguez kfree(rd); 15463f2355cbSLuis R. Rodriguez rd = NULL; 15473f2355cbSLuis R. Rodriguez 1548b8295acdSLuis R. Rodriguez reset_regdomains(); 15493f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 1550b2e1b302SLuis R. Rodriguez 1551b2e1b302SLuis R. Rodriguez return 0; 1552b2e1b302SLuis R. Rodriguez } 1553b2e1b302SLuis R. Rodriguez 1554b2e1b302SLuis R. Rodriguez 1555b2e1b302SLuis R. Rodriguez /* Use this call to set the current regulatory domain. Conflicts with 1556b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 1557d2372b31SJohannes Berg * kmalloc'd the rd structure. Caller must hold cfg80211_drv_mutex */ 1558a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 1559b2e1b302SLuis R. Rodriguez { 1560b2e1b302SLuis R. Rodriguez int r; 1561b2e1b302SLuis R. Rodriguez 1562b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 1563b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 1564d2372b31SJohannes Berg if (r) { 1565d2372b31SJohannes Berg kfree(rd); 1566b2e1b302SLuis R. Rodriguez return r; 1567d2372b31SJohannes Berg } 1568b2e1b302SLuis R. Rodriguez 1569b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 1570a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 1571b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 1572b2e1b302SLuis R. Rodriguez 1573b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 1574f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 1575b2e1b302SLuis R. Rodriguez 1576a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 1577b2e1b302SLuis R. Rodriguez 1578b2e1b302SLuis R. Rodriguez return r; 1579b2e1b302SLuis R. Rodriguez } 1580b2e1b302SLuis R. Rodriguez 15813f2355cbSLuis R. Rodriguez /* Caller must hold cfg80211_drv_mutex */ 15823f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 15833f2355cbSLuis R. Rodriguez { 15843e0c3ff3SLuis R. Rodriguez kfree(wiphy->regd); 15854a4f4d80SJohannes Berg if (!last_request || !last_request->wiphy) 15863f2355cbSLuis R. Rodriguez return; 15873f2355cbSLuis R. Rodriguez if (last_request->wiphy != wiphy) 15883f2355cbSLuis R. Rodriguez return; 15893f2355cbSLuis R. Rodriguez last_request->wiphy = NULL; 15903f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 15913f2355cbSLuis R. Rodriguez } 15923f2355cbSLuis R. Rodriguez 1593b2e1b302SLuis R. Rodriguez int regulatory_init(void) 1594b2e1b302SLuis R. Rodriguez { 1595734366deSJohannes Berg int err; 1596734366deSJohannes Berg 1597b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 1598b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 1599b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 1600734366deSJohannes Berg 1601734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 1602a3d2eaf0SJohannes Berg cfg80211_regdomain = static_regdom(ieee80211_regdom); 1603734366deSJohannes Berg 1604942b25cfSJohannes Berg printk(KERN_INFO "cfg80211: Using static regulatory domain info\n"); 1605734366deSJohannes Berg print_regdomain_info(cfg80211_regdomain); 1606734366deSJohannes Berg /* The old code still requests for a new regdomain and if 1607734366deSJohannes Berg * you have CRDA you get it updated, otherwise you get 1608734366deSJohannes Berg * stuck with the static values. We ignore "EU" code as 1609734366deSJohannes Berg * that is not a valid ISO / IEC 3166 alpha2 */ 1610ac9440a4SJohannes Berg if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U') 1611734366deSJohannes Berg err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, 16123f2355cbSLuis R. Rodriguez ieee80211_regdom, 0, ENVIRON_ANY); 1613734366deSJohannes Berg #else 1614a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 1615734366deSJohannes Berg 16163f2355cbSLuis R. Rodriguez err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", 0, ENVIRON_ANY); 1617734366deSJohannes Berg if (err) 1618734366deSJohannes Berg printk(KERN_ERR "cfg80211: calling CRDA failed - " 1619734366deSJohannes Berg "unable to update world regulatory domain, " 1620734366deSJohannes Berg "using static definition\n"); 1621734366deSJohannes Berg #endif 1622734366deSJohannes Berg 1623b2e1b302SLuis R. Rodriguez return 0; 1624b2e1b302SLuis R. Rodriguez } 1625b2e1b302SLuis R. Rodriguez 1626b2e1b302SLuis R. Rodriguez void regulatory_exit(void) 1627b2e1b302SLuis R. Rodriguez { 1628b2e1b302SLuis R. Rodriguez mutex_lock(&cfg80211_drv_mutex); 1629734366deSJohannes Berg 1630b2e1b302SLuis R. Rodriguez reset_regdomains(); 1631734366deSJohannes Berg 16323f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 16333f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 16343f2355cbSLuis R. Rodriguez 1635f6037d09SJohannes Berg kfree(last_request); 1636f6037d09SJohannes Berg 1637b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 1638734366deSJohannes Berg 1639b2e1b302SLuis R. Rodriguez mutex_unlock(&cfg80211_drv_mutex); 16408318d78aSJohannes Berg } 1641