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 /** 465166ccd2SLuis R. Rodriguez * struct regulatory_request - receipt of last regulatory request 475166ccd2SLuis R. Rodriguez * 485166ccd2SLuis R. Rodriguez * @wiphy: this is set if this request's initiator is 495166ccd2SLuis R. Rodriguez * %REGDOM_SET_BY_COUNTRY_IE or %REGDOM_SET_BY_DRIVER. This 505166ccd2SLuis R. Rodriguez * can be used by the wireless core to deal with conflicts 515166ccd2SLuis R. Rodriguez * and potentially inform users of which devices specifically 525166ccd2SLuis R. Rodriguez * cased the conflicts. 535166ccd2SLuis R. Rodriguez * @initiator: indicates who sent this request, could be any of 545166ccd2SLuis R. Rodriguez * of those set in reg_set_by, %REGDOM_SET_BY_* 555166ccd2SLuis R. Rodriguez * @alpha2: the ISO / IEC 3166 alpha2 country code of the requested 565166ccd2SLuis R. Rodriguez * regulatory domain. We have a few special codes: 575166ccd2SLuis R. Rodriguez * 00 - World regulatory domain 585166ccd2SLuis R. Rodriguez * 99 - built by driver but a specific alpha2 cannot be determined 595166ccd2SLuis R. Rodriguez * 98 - result of an intersection between two regulatory domains 605166ccd2SLuis R. Rodriguez * @intersect: indicates whether the wireless core should intersect 615166ccd2SLuis R. Rodriguez * the requested regulatory domain with the presently set regulatory 625166ccd2SLuis R. Rodriguez * domain. 633f2355cbSLuis R. Rodriguez * @country_ie_checksum: checksum of the last processed and accepted 643f2355cbSLuis R. Rodriguez * country IE 653f2355cbSLuis R. Rodriguez * @country_ie_env: lets us know if the AP is telling us we are outdoor, 663f2355cbSLuis R. Rodriguez * indoor, or if it doesn't matter 67be3d4810SJohannes Berg */ 68734366deSJohannes Berg struct regulatory_request { 69734366deSJohannes Berg struct wiphy *wiphy; 70734366deSJohannes Berg enum reg_set_by initiator; 71734366deSJohannes Berg char alpha2[2]; 729c96477dSLuis R. Rodriguez bool intersect; 733f2355cbSLuis R. Rodriguez u32 country_ie_checksum; 743f2355cbSLuis R. Rodriguez enum environment_cap country_ie_env; 75734366deSJohannes Berg }; 76734366deSJohannes Berg 775166ccd2SLuis R. Rodriguez /* Receipt of information from last regulatory request */ 78f6037d09SJohannes Berg static struct regulatory_request *last_request; 79734366deSJohannes Berg 80b2e1b302SLuis R. Rodriguez /* To trigger userspace events */ 81b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 828318d78aSJohannes Berg 83b2e1b302SLuis R. Rodriguez /* Keep the ordering from large to small */ 84b2e1b302SLuis R. Rodriguez static u32 supported_bandwidths[] = { 85b2e1b302SLuis R. Rodriguez MHZ_TO_KHZ(40), 86b2e1b302SLuis R. Rodriguez MHZ_TO_KHZ(20), 878318d78aSJohannes Berg }; 888318d78aSJohannes Berg 89734366deSJohannes Berg /* Central wireless core regulatory domains, we only need two, 90734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 91734366deSJohannes Berg * information to give us an alpha2 */ 92a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_regdomain; 93734366deSJohannes Berg 943f2355cbSLuis R. Rodriguez /* We use this as a place for the rd structure built from the 953f2355cbSLuis R. Rodriguez * last parsed country IE to rest until CRDA gets back to us with 963f2355cbSLuis R. Rodriguez * what it thinks should apply for the same country */ 973f2355cbSLuis R. Rodriguez static const struct ieee80211_regdomain *country_ie_regdomain; 983f2355cbSLuis R. Rodriguez 99734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 100734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 101734366deSJohannes Berg .n_reg_rules = 1, 102734366deSJohannes Berg .alpha2 = "00", 103734366deSJohannes Berg .reg_rules = { 104734366deSJohannes Berg REG_RULE(2412-10, 2462+10, 40, 6, 20, 105734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN | 106734366deSJohannes Berg NL80211_RRF_NO_IBSS), 107734366deSJohannes Berg } 108734366deSJohannes Berg }; 109734366deSJohannes Berg 110a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 111a3d2eaf0SJohannes Berg &world_regdom; 112734366deSJohannes Berg 113734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 114734366deSJohannes Berg static char *ieee80211_regdom = "US"; 115734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 116734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 117734366deSJohannes Berg 118734366deSJohannes Berg /* We assume 40 MHz bandwidth for the old regulatory work. 119734366deSJohannes Berg * We make emphasis we are using the exact same frequencies 120734366deSJohannes Berg * as before */ 121734366deSJohannes Berg 122734366deSJohannes Berg static const struct ieee80211_regdomain us_regdom = { 123734366deSJohannes Berg .n_reg_rules = 6, 124734366deSJohannes Berg .alpha2 = "US", 125734366deSJohannes Berg .reg_rules = { 126734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..11 */ 127734366deSJohannes Berg REG_RULE(2412-10, 2462+10, 40, 6, 27, 0), 128734366deSJohannes Berg /* IEEE 802.11a, channel 36 */ 129734366deSJohannes Berg REG_RULE(5180-10, 5180+10, 40, 6, 23, 0), 130734366deSJohannes Berg /* IEEE 802.11a, channel 40 */ 131734366deSJohannes Berg REG_RULE(5200-10, 5200+10, 40, 6, 23, 0), 132734366deSJohannes Berg /* IEEE 802.11a, channel 44 */ 133734366deSJohannes Berg REG_RULE(5220-10, 5220+10, 40, 6, 23, 0), 134734366deSJohannes Berg /* IEEE 802.11a, channels 48..64 */ 135734366deSJohannes Berg REG_RULE(5240-10, 5320+10, 40, 6, 23, 0), 136734366deSJohannes Berg /* IEEE 802.11a, channels 149..165, outdoor */ 137734366deSJohannes Berg REG_RULE(5745-10, 5825+10, 40, 6, 30, 0), 138734366deSJohannes Berg } 139734366deSJohannes Berg }; 140734366deSJohannes Berg 141734366deSJohannes Berg static const struct ieee80211_regdomain jp_regdom = { 142734366deSJohannes Berg .n_reg_rules = 3, 143734366deSJohannes Berg .alpha2 = "JP", 144734366deSJohannes Berg .reg_rules = { 145734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..14 */ 146734366deSJohannes Berg REG_RULE(2412-10, 2484+10, 40, 6, 20, 0), 147734366deSJohannes Berg /* IEEE 802.11a, channels 34..48 */ 148734366deSJohannes Berg REG_RULE(5170-10, 5240+10, 40, 6, 20, 149734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 150734366deSJohannes Berg /* IEEE 802.11a, channels 52..64 */ 151734366deSJohannes Berg REG_RULE(5260-10, 5320+10, 40, 6, 20, 152734366deSJohannes Berg NL80211_RRF_NO_IBSS | 153734366deSJohannes Berg NL80211_RRF_DFS), 154734366deSJohannes Berg } 155734366deSJohannes Berg }; 156734366deSJohannes Berg 157734366deSJohannes Berg static const struct ieee80211_regdomain eu_regdom = { 158734366deSJohannes Berg .n_reg_rules = 6, 159734366deSJohannes Berg /* This alpha2 is bogus, we leave it here just for stupid 160734366deSJohannes Berg * backward compatibility */ 161734366deSJohannes Berg .alpha2 = "EU", 162734366deSJohannes Berg .reg_rules = { 163734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..13 */ 164734366deSJohannes Berg REG_RULE(2412-10, 2472+10, 40, 6, 20, 0), 165734366deSJohannes Berg /* IEEE 802.11a, channel 36 */ 166734366deSJohannes Berg REG_RULE(5180-10, 5180+10, 40, 6, 23, 167734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 168734366deSJohannes Berg /* IEEE 802.11a, channel 40 */ 169734366deSJohannes Berg REG_RULE(5200-10, 5200+10, 40, 6, 23, 170734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 171734366deSJohannes Berg /* IEEE 802.11a, channel 44 */ 172734366deSJohannes Berg REG_RULE(5220-10, 5220+10, 40, 6, 23, 173734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 174734366deSJohannes Berg /* IEEE 802.11a, channels 48..64 */ 175734366deSJohannes Berg REG_RULE(5240-10, 5320+10, 40, 6, 20, 176734366deSJohannes Berg NL80211_RRF_NO_IBSS | 177734366deSJohannes Berg NL80211_RRF_DFS), 178734366deSJohannes Berg /* IEEE 802.11a, channels 100..140 */ 179734366deSJohannes Berg REG_RULE(5500-10, 5700+10, 40, 6, 30, 180734366deSJohannes Berg NL80211_RRF_NO_IBSS | 181734366deSJohannes Berg NL80211_RRF_DFS), 182734366deSJohannes Berg } 183734366deSJohannes Berg }; 184734366deSJohannes Berg 185734366deSJohannes Berg static const struct ieee80211_regdomain *static_regdom(char *alpha2) 186734366deSJohannes Berg { 187734366deSJohannes Berg if (alpha2[0] == 'U' && alpha2[1] == 'S') 188734366deSJohannes Berg return &us_regdom; 189734366deSJohannes Berg if (alpha2[0] == 'J' && alpha2[1] == 'P') 190734366deSJohannes Berg return &jp_regdom; 191734366deSJohannes Berg if (alpha2[0] == 'E' && alpha2[1] == 'U') 192734366deSJohannes Berg return &eu_regdom; 193734366deSJohannes Berg /* Default, as per the old rules */ 194734366deSJohannes Berg return &us_regdom; 195734366deSJohannes Berg } 196734366deSJohannes Berg 197a3d2eaf0SJohannes Berg static bool is_old_static_regdom(const struct ieee80211_regdomain *rd) 198734366deSJohannes Berg { 199734366deSJohannes Berg if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom) 200734366deSJohannes Berg return true; 201734366deSJohannes Berg return false; 202734366deSJohannes Berg } 203734366deSJohannes Berg #else 204942b25cfSJohannes Berg static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd) 205942b25cfSJohannes Berg { 206942b25cfSJohannes Berg return false; 207942b25cfSJohannes Berg } 208942b25cfSJohannes Berg #endif 209942b25cfSJohannes Berg 210734366deSJohannes Berg static void reset_regdomains(void) 211734366deSJohannes Berg { 212942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 213942b25cfSJohannes Berg if (cfg80211_regdomain == cfg80211_world_regdom) 214942b25cfSJohannes Berg cfg80211_regdomain = NULL; 215942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 216942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 217942b25cfSJohannes Berg if (cfg80211_regdomain == &world_regdom) 218942b25cfSJohannes Berg cfg80211_regdomain = NULL; 219942b25cfSJohannes Berg if (is_old_static_regdom(cfg80211_regdomain)) 220942b25cfSJohannes Berg cfg80211_regdomain = NULL; 221942b25cfSJohannes Berg 222734366deSJohannes Berg kfree(cfg80211_regdomain); 223734366deSJohannes Berg kfree(cfg80211_world_regdom); 224734366deSJohannes Berg 225a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 226734366deSJohannes Berg cfg80211_regdomain = NULL; 227734366deSJohannes Berg } 228734366deSJohannes Berg 229734366deSJohannes Berg /* Dynamic world regulatory domain requested by the wireless 230734366deSJohannes Berg * core upon initialization */ 231a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 232734366deSJohannes Berg { 233f6037d09SJohannes Berg BUG_ON(!last_request); 234734366deSJohannes Berg 235734366deSJohannes Berg reset_regdomains(); 236734366deSJohannes Berg 237734366deSJohannes Berg cfg80211_world_regdom = rd; 238734366deSJohannes Berg cfg80211_regdomain = rd; 239734366deSJohannes Berg } 240734366deSJohannes Berg 241a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 242b2e1b302SLuis R. Rodriguez { 243b2e1b302SLuis R. Rodriguez if (!alpha2) 244b2e1b302SLuis R. Rodriguez return false; 245b2e1b302SLuis R. Rodriguez if (alpha2[0] == '0' && alpha2[1] == '0') 246b2e1b302SLuis R. Rodriguez return true; 247b2e1b302SLuis R. Rodriguez return false; 248b2e1b302SLuis R. Rodriguez } 249b2e1b302SLuis R. Rodriguez 250a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 251b2e1b302SLuis R. Rodriguez { 252b2e1b302SLuis R. Rodriguez if (!alpha2) 253b2e1b302SLuis R. Rodriguez return false; 254b2e1b302SLuis R. Rodriguez if (alpha2[0] != 0 && alpha2[1] != 0) 255b2e1b302SLuis R. Rodriguez return true; 256b2e1b302SLuis R. Rodriguez return false; 257b2e1b302SLuis R. Rodriguez } 258b2e1b302SLuis R. Rodriguez 259b2e1b302SLuis R. Rodriguez static bool is_alpha_upper(char letter) 260b2e1b302SLuis R. Rodriguez { 261b2e1b302SLuis R. Rodriguez /* ASCII A - Z */ 262b2e1b302SLuis R. Rodriguez if (letter >= 65 && letter <= 90) 263b2e1b302SLuis R. Rodriguez return true; 264b2e1b302SLuis R. Rodriguez return false; 265b2e1b302SLuis R. Rodriguez } 266b2e1b302SLuis R. Rodriguez 267a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 268b2e1b302SLuis R. Rodriguez { 269b2e1b302SLuis R. Rodriguez if (!alpha2) 270b2e1b302SLuis R. Rodriguez return false; 271b2e1b302SLuis R. Rodriguez /* Special case where regulatory domain was built by driver 272b2e1b302SLuis R. Rodriguez * but a specific alpha2 cannot be determined */ 273b2e1b302SLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '9') 274b2e1b302SLuis R. Rodriguez return true; 275b2e1b302SLuis R. Rodriguez return false; 276b2e1b302SLuis R. Rodriguez } 277b2e1b302SLuis R. Rodriguez 2783f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2793f2355cbSLuis R. Rodriguez { 2803f2355cbSLuis R. Rodriguez if (!alpha2) 2813f2355cbSLuis R. Rodriguez return false; 2823f2355cbSLuis R. Rodriguez /* Special case where regulatory domain is the 2833f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 2843f2355cbSLuis R. Rodriguez * structures */ 2853f2355cbSLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '8') 2863f2355cbSLuis R. Rodriguez return true; 2873f2355cbSLuis R. Rodriguez return false; 2883f2355cbSLuis R. Rodriguez } 2893f2355cbSLuis R. Rodriguez 290a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 291b2e1b302SLuis R. Rodriguez { 292b2e1b302SLuis R. Rodriguez if (!alpha2) 293b2e1b302SLuis R. Rodriguez return false; 294b2e1b302SLuis R. Rodriguez if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) 295b2e1b302SLuis R. Rodriguez return true; 296b2e1b302SLuis R. Rodriguez return false; 297b2e1b302SLuis R. Rodriguez } 298b2e1b302SLuis R. Rodriguez 299a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 300b2e1b302SLuis R. Rodriguez { 301b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 302b2e1b302SLuis R. Rodriguez return false; 303b2e1b302SLuis R. Rodriguez if (alpha2_x[0] == alpha2_y[0] && 304b2e1b302SLuis R. Rodriguez alpha2_x[1] == alpha2_y[1]) 305b2e1b302SLuis R. Rodriguez return true; 306b2e1b302SLuis R. Rodriguez return false; 307b2e1b302SLuis R. Rodriguez } 308b2e1b302SLuis R. Rodriguez 309a3d2eaf0SJohannes Berg static bool regdom_changed(const char *alpha2) 310b2e1b302SLuis R. Rodriguez { 311b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 312b2e1b302SLuis R. Rodriguez return true; 313b2e1b302SLuis R. Rodriguez if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 314b2e1b302SLuis R. Rodriguez return false; 315b2e1b302SLuis R. Rodriguez return true; 316b2e1b302SLuis R. Rodriguez } 317b2e1b302SLuis R. Rodriguez 3183f2355cbSLuis R. Rodriguez /** 3193f2355cbSLuis R. Rodriguez * country_ie_integrity_changes - tells us if the country IE has changed 3203f2355cbSLuis R. Rodriguez * @checksum: checksum of country IE of fields we are interested in 3213f2355cbSLuis R. Rodriguez * 3223f2355cbSLuis R. Rodriguez * If the country IE has not changed you can ignore it safely. This is 3233f2355cbSLuis R. Rodriguez * useful to determine if two devices are seeing two different country IEs 3243f2355cbSLuis R. Rodriguez * even on the same alpha2. Note that this will return false if no IE has 3253f2355cbSLuis R. Rodriguez * been set on the wireless core yet. 3263f2355cbSLuis R. Rodriguez */ 3273f2355cbSLuis R. Rodriguez static bool country_ie_integrity_changes(u32 checksum) 3283f2355cbSLuis R. Rodriguez { 3293f2355cbSLuis R. Rodriguez /* If no IE has been set then the checksum doesn't change */ 3303f2355cbSLuis R. Rodriguez if (unlikely(!last_request->country_ie_checksum)) 3313f2355cbSLuis R. Rodriguez return false; 3323f2355cbSLuis R. Rodriguez if (unlikely(last_request->country_ie_checksum != checksum)) 3333f2355cbSLuis R. Rodriguez return true; 3343f2355cbSLuis R. Rodriguez return false; 3353f2355cbSLuis R. Rodriguez } 3363f2355cbSLuis R. Rodriguez 337b2e1b302SLuis R. Rodriguez /* This lets us keep regulatory code which is updated on a regulatory 338b2e1b302SLuis R. Rodriguez * basis in userspace. */ 339b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 340b2e1b302SLuis R. Rodriguez { 341b2e1b302SLuis R. Rodriguez char country_env[9 + 2] = "COUNTRY="; 342b2e1b302SLuis R. Rodriguez char *envp[] = { 343b2e1b302SLuis R. Rodriguez country_env, 344b2e1b302SLuis R. Rodriguez NULL 3458318d78aSJohannes Berg }; 3468318d78aSJohannes Berg 347b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 348b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", 349b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 350b2e1b302SLuis R. Rodriguez else 351b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA to update world " 352b2e1b302SLuis R. Rodriguez "regulatory domain\n"); 3538318d78aSJohannes Berg 354b2e1b302SLuis R. Rodriguez country_env[8] = alpha2[0]; 355b2e1b302SLuis R. Rodriguez country_env[9] = alpha2[1]; 3568318d78aSJohannes Berg 357b2e1b302SLuis R. Rodriguez return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); 358b2e1b302SLuis R. Rodriguez } 359b2e1b302SLuis R. Rodriguez 360b2e1b302SLuis R. Rodriguez /* Used by nl80211 before kmalloc'ing our regulatory domain */ 361a3d2eaf0SJohannes Berg bool reg_is_valid_request(const char *alpha2) 362b2e1b302SLuis R. Rodriguez { 363f6037d09SJohannes Berg if (!last_request) 364f6037d09SJohannes Berg return false; 365f6037d09SJohannes Berg 366f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 367b2e1b302SLuis R. Rodriguez } 368b2e1b302SLuis R. Rodriguez 369b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 370a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 371b2e1b302SLuis R. Rodriguez { 372a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 373b2e1b302SLuis R. Rodriguez u32 freq_diff; 374b2e1b302SLuis R. Rodriguez 37591e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 376b2e1b302SLuis R. Rodriguez return false; 377b2e1b302SLuis R. Rodriguez 378b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 379b2e1b302SLuis R. Rodriguez return false; 380b2e1b302SLuis R. Rodriguez 381b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 382b2e1b302SLuis R. Rodriguez 383d71aaf60SLuis R. Rodriguez if (freq_diff <= 0 || freq_range->max_bandwidth_khz > freq_diff) 384b2e1b302SLuis R. Rodriguez return false; 385b2e1b302SLuis R. Rodriguez 386b2e1b302SLuis R. Rodriguez return true; 387b2e1b302SLuis R. Rodriguez } 388b2e1b302SLuis R. Rodriguez 389a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 390b2e1b302SLuis R. Rodriguez { 391a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 392b2e1b302SLuis R. Rodriguez unsigned int i; 393b2e1b302SLuis R. Rodriguez 394b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 395b2e1b302SLuis R. Rodriguez return false; 396b2e1b302SLuis R. Rodriguez 39788dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 39888dc1c3fSLuis R. Rodriguez return false; 39988dc1c3fSLuis R. Rodriguez 400b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 401b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 402b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 403b2e1b302SLuis R. Rodriguez return false; 404b2e1b302SLuis R. Rodriguez } 405b2e1b302SLuis R. Rodriguez 406b2e1b302SLuis R. Rodriguez return true; 407b2e1b302SLuis R. Rodriguez } 408b2e1b302SLuis R. Rodriguez 409b2e1b302SLuis R. Rodriguez /* Returns value in KHz */ 410b2e1b302SLuis R. Rodriguez static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range, 411b2e1b302SLuis R. Rodriguez u32 freq) 412b2e1b302SLuis R. Rodriguez { 413b2e1b302SLuis R. Rodriguez unsigned int i; 414b2e1b302SLuis R. Rodriguez for (i = 0; i < ARRAY_SIZE(supported_bandwidths); i++) { 415b2e1b302SLuis R. Rodriguez u32 start_freq_khz = freq - supported_bandwidths[i]/2; 416b2e1b302SLuis R. Rodriguez u32 end_freq_khz = freq + supported_bandwidths[i]/2; 417b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 418b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 419b2e1b302SLuis R. Rodriguez return supported_bandwidths[i]; 420b2e1b302SLuis R. Rodriguez } 421b2e1b302SLuis R. Rodriguez return 0; 422b2e1b302SLuis R. Rodriguez } 423b2e1b302SLuis R. Rodriguez 4243f2355cbSLuis R. Rodriguez /* Converts a country IE to a regulatory domain. A regulatory domain 4253f2355cbSLuis R. Rodriguez * structure has a lot of information which the IE doesn't yet have, 4263f2355cbSLuis R. Rodriguez * so for the other values we use upper max values as we will intersect 4273f2355cbSLuis R. Rodriguez * with our userspace regulatory agent to get lower bounds. */ 4283f2355cbSLuis R. Rodriguez static struct ieee80211_regdomain *country_ie_2_rd( 4293f2355cbSLuis R. Rodriguez u8 *country_ie, 4303f2355cbSLuis R. Rodriguez u8 country_ie_len, 4313f2355cbSLuis R. Rodriguez u32 *checksum) 4323f2355cbSLuis R. Rodriguez { 4333f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 4343f2355cbSLuis R. Rodriguez unsigned int i = 0; 4353f2355cbSLuis R. Rodriguez char alpha2[2]; 4363f2355cbSLuis R. Rodriguez u32 flags = 0; 4373f2355cbSLuis R. Rodriguez u32 num_rules = 0, size_of_regd = 0; 4383f2355cbSLuis R. Rodriguez u8 *triplets_start = NULL; 4393f2355cbSLuis R. Rodriguez u8 len_at_triplet = 0; 4403f2355cbSLuis R. Rodriguez /* the last channel we have registered in a subband (triplet) */ 4413f2355cbSLuis R. Rodriguez int last_sub_max_channel = 0; 4423f2355cbSLuis R. Rodriguez 4433f2355cbSLuis R. Rodriguez *checksum = 0xDEADBEEF; 4443f2355cbSLuis R. Rodriguez 4453f2355cbSLuis R. Rodriguez /* Country IE requirements */ 4463f2355cbSLuis R. Rodriguez BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || 4473f2355cbSLuis R. Rodriguez country_ie_len & 0x01); 4483f2355cbSLuis R. Rodriguez 4493f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 4503f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 4513f2355cbSLuis R. Rodriguez 4523f2355cbSLuis R. Rodriguez /* 4533f2355cbSLuis R. Rodriguez * Third octet can be: 4543f2355cbSLuis R. Rodriguez * 'I' - Indoor 4553f2355cbSLuis R. Rodriguez * 'O' - Outdoor 4563f2355cbSLuis R. Rodriguez * 4573f2355cbSLuis R. Rodriguez * anything else we assume is no restrictions 4583f2355cbSLuis R. Rodriguez */ 4593f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 4603f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_OUTDOOR; 4613f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 4623f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_INDOOR; 4633f2355cbSLuis R. Rodriguez 4643f2355cbSLuis R. Rodriguez country_ie += 3; 4653f2355cbSLuis R. Rodriguez country_ie_len -= 3; 4663f2355cbSLuis R. Rodriguez 4673f2355cbSLuis R. Rodriguez triplets_start = country_ie; 4683f2355cbSLuis R. Rodriguez len_at_triplet = country_ie_len; 4693f2355cbSLuis R. Rodriguez 4703f2355cbSLuis R. Rodriguez *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); 4713f2355cbSLuis R. Rodriguez 4723f2355cbSLuis R. Rodriguez /* We need to build a reg rule for each triplet, but first we must 4733f2355cbSLuis R. Rodriguez * calculate the number of reg rules we will need. We will need one 4743f2355cbSLuis R. Rodriguez * for each channel subband */ 4753f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 4763f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 4773f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 4783f2355cbSLuis R. Rodriguez int cur_sub_max_channel = 0, cur_channel = 0; 4793f2355cbSLuis R. Rodriguez 4803f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 4813f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 4823f2355cbSLuis R. Rodriguez country_ie += 3; 4833f2355cbSLuis R. Rodriguez country_ie_len -= 3; 4843f2355cbSLuis R. Rodriguez continue; 4853f2355cbSLuis R. Rodriguez } 4863f2355cbSLuis R. Rodriguez 4873f2355cbSLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 4883f2355cbSLuis R. Rodriguez cur_sub_max_channel = ieee80211_channel_to_frequency( 4893f2355cbSLuis R. Rodriguez cur_channel + triplet->chans.num_channels); 4903f2355cbSLuis R. Rodriguez 4913f2355cbSLuis R. Rodriguez /* Basic sanity check */ 4923f2355cbSLuis R. Rodriguez if (cur_sub_max_channel < cur_channel) 4933f2355cbSLuis R. Rodriguez return NULL; 4943f2355cbSLuis R. Rodriguez 4953f2355cbSLuis R. Rodriguez /* Do not allow overlapping channels. Also channels 4963f2355cbSLuis R. Rodriguez * passed in each subband must be monotonically 4973f2355cbSLuis R. Rodriguez * increasing */ 4983f2355cbSLuis R. Rodriguez if (last_sub_max_channel) { 4993f2355cbSLuis R. Rodriguez if (cur_channel <= last_sub_max_channel) 5003f2355cbSLuis R. Rodriguez return NULL; 5013f2355cbSLuis R. Rodriguez if (cur_sub_max_channel <= last_sub_max_channel) 5023f2355cbSLuis R. Rodriguez return NULL; 5033f2355cbSLuis R. Rodriguez } 5043f2355cbSLuis R. Rodriguez 5053f2355cbSLuis R. Rodriguez /* When dot11RegulatoryClassesRequired is supported 5063f2355cbSLuis R. Rodriguez * we can throw ext triplets as part of this soup, 5073f2355cbSLuis R. Rodriguez * for now we don't care when those change as we 5083f2355cbSLuis R. Rodriguez * don't support them */ 5093f2355cbSLuis R. Rodriguez *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | 5103f2355cbSLuis R. Rodriguez ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | 5113f2355cbSLuis R. Rodriguez ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); 5123f2355cbSLuis R. Rodriguez 5133f2355cbSLuis R. Rodriguez last_sub_max_channel = cur_sub_max_channel; 5143f2355cbSLuis R. Rodriguez 5153f2355cbSLuis R. Rodriguez country_ie += 3; 5163f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5173f2355cbSLuis R. Rodriguez num_rules++; 5183f2355cbSLuis R. Rodriguez 5193f2355cbSLuis R. Rodriguez /* Note: this is not a IEEE requirement but 5203f2355cbSLuis R. Rodriguez * simply a memory requirement */ 5213f2355cbSLuis R. Rodriguez if (num_rules > NL80211_MAX_SUPP_REG_RULES) 5223f2355cbSLuis R. Rodriguez return NULL; 5233f2355cbSLuis R. Rodriguez } 5243f2355cbSLuis R. Rodriguez 5253f2355cbSLuis R. Rodriguez country_ie = triplets_start; 5263f2355cbSLuis R. Rodriguez country_ie_len = len_at_triplet; 5273f2355cbSLuis R. Rodriguez 5283f2355cbSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 5293f2355cbSLuis R. Rodriguez (num_rules * sizeof(struct ieee80211_reg_rule)); 5303f2355cbSLuis R. Rodriguez 5313f2355cbSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 5323f2355cbSLuis R. Rodriguez if (!rd) 5333f2355cbSLuis R. Rodriguez return NULL; 5343f2355cbSLuis R. Rodriguez 5353f2355cbSLuis R. Rodriguez rd->n_reg_rules = num_rules; 5363f2355cbSLuis R. Rodriguez rd->alpha2[0] = alpha2[0]; 5373f2355cbSLuis R. Rodriguez rd->alpha2[1] = alpha2[1]; 5383f2355cbSLuis R. Rodriguez 5393f2355cbSLuis R. Rodriguez /* This time around we fill in the rd */ 5403f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 5413f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 5423f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 5433f2355cbSLuis R. Rodriguez struct ieee80211_reg_rule *reg_rule = NULL; 5443f2355cbSLuis R. Rodriguez struct ieee80211_freq_range *freq_range = NULL; 5453f2355cbSLuis R. Rodriguez struct ieee80211_power_rule *power_rule = NULL; 5463f2355cbSLuis R. Rodriguez 5473f2355cbSLuis R. Rodriguez /* Must parse if dot11RegulatoryClassesRequired is true, 5483f2355cbSLuis R. Rodriguez * we don't support this yet */ 5493f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 5503f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 5513f2355cbSLuis R. Rodriguez country_ie += 3; 5523f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5533f2355cbSLuis R. Rodriguez continue; 5543f2355cbSLuis R. Rodriguez } 5553f2355cbSLuis R. Rodriguez 5563f2355cbSLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 5573f2355cbSLuis R. Rodriguez freq_range = ®_rule->freq_range; 5583f2355cbSLuis R. Rodriguez power_rule = ®_rule->power_rule; 5593f2355cbSLuis R. Rodriguez 5603f2355cbSLuis R. Rodriguez reg_rule->flags = flags; 5613f2355cbSLuis R. Rodriguez 5623f2355cbSLuis R. Rodriguez /* The +10 is since the regulatory domain expects 5633f2355cbSLuis R. Rodriguez * the actual band edge, not the center of freq for 5643f2355cbSLuis R. Rodriguez * its start and end freqs, assuming 20 MHz bandwidth on 5653f2355cbSLuis R. Rodriguez * the channels passed */ 5663f2355cbSLuis R. Rodriguez freq_range->start_freq_khz = 5673f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 5683f2355cbSLuis R. Rodriguez triplet->chans.first_channel) - 10); 5693f2355cbSLuis R. Rodriguez freq_range->end_freq_khz = 5703f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 5713f2355cbSLuis R. Rodriguez triplet->chans.first_channel + 5723f2355cbSLuis R. Rodriguez triplet->chans.num_channels) + 10); 5733f2355cbSLuis R. Rodriguez 5743f2355cbSLuis R. Rodriguez /* Large arbitrary values, we intersect later */ 5753f2355cbSLuis R. Rodriguez /* Increment this if we ever support >= 40 MHz channels 5763f2355cbSLuis R. Rodriguez * in IEEE 802.11 */ 5773f2355cbSLuis R. Rodriguez freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); 5783f2355cbSLuis R. Rodriguez power_rule->max_antenna_gain = DBI_TO_MBI(100); 5793f2355cbSLuis R. Rodriguez power_rule->max_eirp = DBM_TO_MBM(100); 5803f2355cbSLuis R. Rodriguez 5813f2355cbSLuis R. Rodriguez country_ie += 3; 5823f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5833f2355cbSLuis R. Rodriguez i++; 5843f2355cbSLuis R. Rodriguez 5853f2355cbSLuis R. Rodriguez BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); 5863f2355cbSLuis R. Rodriguez } 5873f2355cbSLuis R. Rodriguez 5883f2355cbSLuis R. Rodriguez return rd; 5893f2355cbSLuis R. Rodriguez } 5903f2355cbSLuis R. Rodriguez 5913f2355cbSLuis R. Rodriguez 5929c96477dSLuis R. Rodriguez /* Helper for regdom_intersect(), this does the real 5939c96477dSLuis R. Rodriguez * mathematical intersection fun */ 5949c96477dSLuis R. Rodriguez static int reg_rules_intersect( 5959c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 5969c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 5979c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 5989c96477dSLuis R. Rodriguez { 5999c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 6009c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 6019c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 6029c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 6039c96477dSLuis R. Rodriguez u32 freq_diff; 6049c96477dSLuis R. Rodriguez 6059c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 6069c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 6079c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 6089c96477dSLuis R. Rodriguez 6099c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 6109c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 6119c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 6129c96477dSLuis R. Rodriguez 6139c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 6149c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 6159c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 6169c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 6179c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 6189c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 6199c96477dSLuis R. Rodriguez 6209c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 6219c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 6229c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 6239c96477dSLuis R. Rodriguez 6249c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 6259c96477dSLuis R. Rodriguez power_rule2->max_eirp); 6269c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 6279c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 6289c96477dSLuis R. Rodriguez 6299c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 6309c96477dSLuis R. Rodriguez 6319c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 6329c96477dSLuis R. Rodriguez return -EINVAL; 6339c96477dSLuis R. Rodriguez 6349c96477dSLuis R. Rodriguez return 0; 6359c96477dSLuis R. Rodriguez } 6369c96477dSLuis R. Rodriguez 6379c96477dSLuis R. Rodriguez /** 6389c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 6399c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 6409c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 6419c96477dSLuis R. Rodriguez * 6429c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 6439c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 6449c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 6459c96477dSLuis R. Rodriguez * 6469c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 6479c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 6489c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 6499c96477dSLuis R. Rodriguez */ 6509c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 6519c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 6529c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 6539c96477dSLuis R. Rodriguez { 6549c96477dSLuis R. Rodriguez int r, size_of_regd; 6559c96477dSLuis R. Rodriguez unsigned int x, y; 6569c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 6579c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 6589c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 6599c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 6609c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 6619c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 6629c96477dSLuis R. Rodriguez 6639c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 6649c96477dSLuis R. Rodriguez intersected_rule = &irule; 6659c96477dSLuis R. Rodriguez 6669c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 6679c96477dSLuis R. Rodriguez 6689c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 6699c96477dSLuis R. Rodriguez return NULL; 6709c96477dSLuis R. Rodriguez 6719c96477dSLuis R. Rodriguez /* First we get a count of the rules we'll need, then we actually 6729c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 6739c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 6749c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 6759c96477dSLuis R. Rodriguez * All rules that do check out OK are valid. */ 6769c96477dSLuis R. Rodriguez 6779c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 6789c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 6799c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 6809c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 6819c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 6829c96477dSLuis R. Rodriguez intersected_rule)) 6839c96477dSLuis R. Rodriguez num_rules++; 6849c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 6859c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 6869c96477dSLuis R. Rodriguez } 6879c96477dSLuis R. Rodriguez } 6889c96477dSLuis R. Rodriguez 6899c96477dSLuis R. Rodriguez if (!num_rules) 6909c96477dSLuis R. Rodriguez return NULL; 6919c96477dSLuis R. Rodriguez 6929c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 6939c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 6949c96477dSLuis R. Rodriguez 6959c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 6969c96477dSLuis R. Rodriguez if (!rd) 6979c96477dSLuis R. Rodriguez return NULL; 6989c96477dSLuis R. Rodriguez 6999c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7009c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7019c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7029c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 7039c96477dSLuis R. Rodriguez /* This time around instead of using the stack lets 7049c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 7059c96477dSLuis R. Rodriguez * a memcpy() */ 7069c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 7079c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 7089c96477dSLuis R. Rodriguez intersected_rule); 7099c96477dSLuis R. Rodriguez /* No need to memset here the intersected rule here as 7109c96477dSLuis R. Rodriguez * we're not using the stack anymore */ 7119c96477dSLuis R. Rodriguez if (r) 7129c96477dSLuis R. Rodriguez continue; 7139c96477dSLuis R. Rodriguez rule_idx++; 7149c96477dSLuis R. Rodriguez } 7159c96477dSLuis R. Rodriguez } 7169c96477dSLuis R. Rodriguez 7179c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 7189c96477dSLuis R. Rodriguez kfree(rd); 7199c96477dSLuis R. Rodriguez return NULL; 7209c96477dSLuis R. Rodriguez } 7219c96477dSLuis R. Rodriguez 7229c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 7239c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 7249c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 7259c96477dSLuis R. Rodriguez 7269c96477dSLuis R. Rodriguez return rd; 7279c96477dSLuis R. Rodriguez } 7289c96477dSLuis R. Rodriguez 729b2e1b302SLuis R. Rodriguez /* XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 730b2e1b302SLuis R. Rodriguez * want to just have the channel structure use these */ 731b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 732b2e1b302SLuis R. Rodriguez { 733b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 734b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 735b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 736b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 737b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 738b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 739b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 740b2e1b302SLuis R. Rodriguez return channel_flags; 741b2e1b302SLuis R. Rodriguez } 742b2e1b302SLuis R. Rodriguez 743b2e1b302SLuis R. Rodriguez /** 744b2e1b302SLuis R. Rodriguez * freq_reg_info - get regulatory information for the given frequency 745b2e1b302SLuis R. Rodriguez * @center_freq: Frequency in KHz for which we want regulatory information for 746b2e1b302SLuis R. Rodriguez * @bandwidth: the bandwidth requirement you have in KHz, if you do not have one 747b2e1b302SLuis R. Rodriguez * you can set this to 0. If this frequency is allowed we then set 748b2e1b302SLuis R. Rodriguez * this value to the maximum allowed bandwidth. 749b2e1b302SLuis R. Rodriguez * @reg_rule: the regulatory rule which we have for this frequency 750b2e1b302SLuis R. Rodriguez * 751b2e1b302SLuis R. Rodriguez * Use this function to get the regulatory rule for a specific frequency. 7528318d78aSJohannes Berg */ 753b2e1b302SLuis R. Rodriguez static int freq_reg_info(u32 center_freq, u32 *bandwidth, 754b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 7558318d78aSJohannes Berg { 7568318d78aSJohannes Berg int i; 757b2e1b302SLuis R. Rodriguez u32 max_bandwidth = 0; 7588318d78aSJohannes Berg 759b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 760b2e1b302SLuis R. Rodriguez return -EINVAL; 761b2e1b302SLuis R. Rodriguez 762b2e1b302SLuis R. Rodriguez for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) { 763b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 764b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 765b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 766b2e1b302SLuis R. Rodriguez 767b2e1b302SLuis R. Rodriguez rr = &cfg80211_regdomain->reg_rules[i]; 768b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 769b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 770b2e1b302SLuis R. Rodriguez max_bandwidth = freq_max_bandwidth(fr, center_freq); 771b2e1b302SLuis R. Rodriguez if (max_bandwidth && *bandwidth <= max_bandwidth) { 772b2e1b302SLuis R. Rodriguez *reg_rule = rr; 773b2e1b302SLuis R. Rodriguez *bandwidth = max_bandwidth; 7748318d78aSJohannes Berg break; 7758318d78aSJohannes Berg } 7768318d78aSJohannes Berg } 7778318d78aSJohannes Berg 778b2e1b302SLuis R. Rodriguez return !max_bandwidth; 779b2e1b302SLuis R. Rodriguez } 780b2e1b302SLuis R. Rodriguez 781b2e1b302SLuis R. Rodriguez static void handle_channel(struct ieee80211_channel *chan) 782b2e1b302SLuis R. Rodriguez { 783b2e1b302SLuis R. Rodriguez int r; 784b2e1b302SLuis R. Rodriguez u32 flags = chan->orig_flags; 785b2e1b302SLuis R. Rodriguez u32 max_bandwidth = 0; 786b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 787b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 788b2e1b302SLuis R. Rodriguez 789b2e1b302SLuis R. Rodriguez r = freq_reg_info(MHZ_TO_KHZ(chan->center_freq), 790b2e1b302SLuis R. Rodriguez &max_bandwidth, ®_rule); 791b2e1b302SLuis R. Rodriguez 792b2e1b302SLuis R. Rodriguez if (r) { 7938318d78aSJohannes Berg flags |= IEEE80211_CHAN_DISABLED; 7948318d78aSJohannes Berg chan->flags = flags; 7958318d78aSJohannes Berg return; 7968318d78aSJohannes Berg } 7978318d78aSJohannes Berg 798b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 799b2e1b302SLuis R. Rodriguez 800b2e1b302SLuis R. Rodriguez chan->flags = flags | map_regdom_flags(reg_rule->flags); 8018318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 802b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 803b2e1b302SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); 804253898c4SJohn W. Linville if (chan->orig_mpwr) 805b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 806b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 807253898c4SJohn W. Linville else 808b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 8098318d78aSJohannes Berg } 8108318d78aSJohannes Berg 811b2e1b302SLuis R. Rodriguez static void handle_band(struct ieee80211_supported_band *sband) 8128318d78aSJohannes Berg { 8138318d78aSJohannes Berg int i; 8148318d78aSJohannes Berg 8158318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 816b2e1b302SLuis R. Rodriguez handle_channel(&sband->channels[i]); 8178318d78aSJohannes Berg } 8188318d78aSJohannes Berg 81914b9815aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, enum reg_set_by setby) 82014b9815aSLuis R. Rodriguez { 82114b9815aSLuis R. Rodriguez if (!last_request) 82214b9815aSLuis R. Rodriguez return true; 82314b9815aSLuis R. Rodriguez if (setby == REGDOM_SET_BY_CORE && 82414b9815aSLuis R. Rodriguez wiphy->fw_handles_regulatory) 82514b9815aSLuis R. Rodriguez return true; 82614b9815aSLuis R. Rodriguez return false; 82714b9815aSLuis R. Rodriguez } 82814b9815aSLuis R. Rodriguez 829b2e1b302SLuis R. Rodriguez static void update_all_wiphy_regulatory(enum reg_set_by setby) 830b2e1b302SLuis R. Rodriguez { 831b2e1b302SLuis R. Rodriguez struct cfg80211_registered_device *drv; 832b2e1b302SLuis R. Rodriguez 833b2e1b302SLuis R. Rodriguez list_for_each_entry(drv, &cfg80211_drv_list, list) 83414b9815aSLuis R. Rodriguez if (!ignore_reg_update(&drv->wiphy, setby)) 835b2e1b302SLuis R. Rodriguez wiphy_update_regulatory(&drv->wiphy, setby); 836b2e1b302SLuis R. Rodriguez } 837b2e1b302SLuis R. Rodriguez 838b2e1b302SLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby) 8398318d78aSJohannes Berg { 8408318d78aSJohannes Berg enum ieee80211_band band; 841b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 8428318d78aSJohannes Berg if (wiphy->bands[band]) 843b2e1b302SLuis R. Rodriguez handle_band(wiphy->bands[band]); 844b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 845b2e1b302SLuis R. Rodriguez wiphy->reg_notifier(wiphy, setby); 846b2e1b302SLuis R. Rodriguez } 847b2e1b302SLuis R. Rodriguez } 848b2e1b302SLuis R. Rodriguez 8499c96477dSLuis R. Rodriguez /* Return value which can be used by ignore_request() to indicate 8509c96477dSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains */ 8519c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 8529c96477dSLuis R. Rodriguez 85384fa4f43SJohannes Berg /* This has the logic which determines when a new request 85484fa4f43SJohannes Berg * should be ignored. */ 85584fa4f43SJohannes Berg static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by, 85684fa4f43SJohannes Berg const char *alpha2) 85784fa4f43SJohannes Berg { 85884fa4f43SJohannes Berg /* All initial requests are respected */ 85984fa4f43SJohannes Berg if (!last_request) 86084fa4f43SJohannes Berg return 0; 86184fa4f43SJohannes Berg 86284fa4f43SJohannes Berg switch (set_by) { 86384fa4f43SJohannes Berg case REGDOM_SET_BY_INIT: 86484fa4f43SJohannes Berg return -EINVAL; 86584fa4f43SJohannes Berg case REGDOM_SET_BY_CORE: 86684fa4f43SJohannes Berg /* 86784fa4f43SJohannes Berg * Always respect new wireless core hints, should only happen 86884fa4f43SJohannes Berg * when updating the world regulatory domain at init. 86984fa4f43SJohannes Berg */ 87084fa4f43SJohannes Berg return 0; 87184fa4f43SJohannes Berg case REGDOM_SET_BY_COUNTRY_IE: 87284fa4f43SJohannes Berg if (unlikely(!is_an_alpha2(alpha2))) 87384fa4f43SJohannes Berg return -EINVAL; 87484fa4f43SJohannes Berg if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { 87584fa4f43SJohannes Berg if (last_request->wiphy != wiphy) { 87684fa4f43SJohannes Berg /* 87784fa4f43SJohannes Berg * Two cards with two APs claiming different 87884fa4f43SJohannes Berg * different Country IE alpha2s. We could 87984fa4f43SJohannes Berg * intersect them, but that seems unlikely 88084fa4f43SJohannes Berg * to be correct. Reject second one for now. 88184fa4f43SJohannes Berg */ 88284fa4f43SJohannes Berg if (!alpha2_equal(alpha2, 88384fa4f43SJohannes Berg cfg80211_regdomain->alpha2)) 88484fa4f43SJohannes Berg return -EOPNOTSUPP; 88584fa4f43SJohannes Berg return -EALREADY; 88684fa4f43SJohannes Berg } 8873f2355cbSLuis R. Rodriguez /* Two consecutive Country IE hints on the same wiphy. 8883f2355cbSLuis R. Rodriguez * This should be picked up early by the driver/stack */ 8893f2355cbSLuis R. Rodriguez if (WARN_ON(!alpha2_equal(cfg80211_regdomain->alpha2, 8903f2355cbSLuis R. Rodriguez alpha2))) 89184fa4f43SJohannes Berg return 0; 89284fa4f43SJohannes Berg return -EALREADY; 89384fa4f43SJohannes Berg } 8943f2355cbSLuis R. Rodriguez return REG_INTERSECT; 89584fa4f43SJohannes Berg case REGDOM_SET_BY_DRIVER: 89684fa4f43SJohannes Berg if (last_request->initiator == REGDOM_SET_BY_DRIVER) 89784fa4f43SJohannes Berg return -EALREADY; 89884fa4f43SJohannes Berg return 0; 89984fa4f43SJohannes Berg case REGDOM_SET_BY_USER: 90084fa4f43SJohannes Berg if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) 9019c96477dSLuis R. Rodriguez return REG_INTERSECT; 9023f2355cbSLuis R. Rodriguez /* If the user knows better the user should set the regdom 9033f2355cbSLuis R. Rodriguez * to their country before the IE is picked up */ 9043f2355cbSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_USER && 9053f2355cbSLuis R. Rodriguez last_request->intersect) 9063f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 90784fa4f43SJohannes Berg return 0; 90884fa4f43SJohannes Berg } 90984fa4f43SJohannes Berg 91084fa4f43SJohannes Berg return -EINVAL; 91184fa4f43SJohannes Berg } 91284fa4f43SJohannes Berg 913b2e1b302SLuis R. Rodriguez /* Caller must hold &cfg80211_drv_mutex */ 914b2e1b302SLuis R. Rodriguez int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by, 9153f2355cbSLuis R. Rodriguez const char *alpha2, 9163f2355cbSLuis R. Rodriguez u32 country_ie_checksum, 9173f2355cbSLuis R. Rodriguez enum environment_cap env) 918b2e1b302SLuis R. Rodriguez { 919b2e1b302SLuis R. Rodriguez struct regulatory_request *request; 9209c96477dSLuis R. Rodriguez bool intersect = false; 921b2e1b302SLuis R. Rodriguez int r = 0; 922b2e1b302SLuis R. Rodriguez 923be3d4810SJohannes Berg r = ignore_request(wiphy, set_by, alpha2); 9249c96477dSLuis R. Rodriguez 9259c96477dSLuis R. Rodriguez if (r == REG_INTERSECT) 9269c96477dSLuis R. Rodriguez intersect = true; 9279c96477dSLuis R. Rodriguez else if (r) 928b2e1b302SLuis R. Rodriguez return r; 929b2e1b302SLuis R. Rodriguez 930b2e1b302SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 931b2e1b302SLuis R. Rodriguez GFP_KERNEL); 932b2e1b302SLuis R. Rodriguez if (!request) 933b2e1b302SLuis R. Rodriguez return -ENOMEM; 934b2e1b302SLuis R. Rodriguez 935be3d4810SJohannes Berg request->alpha2[0] = alpha2[0]; 936be3d4810SJohannes Berg request->alpha2[1] = alpha2[1]; 937b2e1b302SLuis R. Rodriguez request->initiator = set_by; 938b2e1b302SLuis R. Rodriguez request->wiphy = wiphy; 9399c96477dSLuis R. Rodriguez request->intersect = intersect; 9403f2355cbSLuis R. Rodriguez request->country_ie_checksum = country_ie_checksum; 9413f2355cbSLuis R. Rodriguez request->country_ie_env = env; 942b2e1b302SLuis R. Rodriguez 943f6037d09SJohannes Berg kfree(last_request); 944f6037d09SJohannes Berg last_request = request; 9453f2355cbSLuis R. Rodriguez /* 9463f2355cbSLuis R. Rodriguez * Note: When CONFIG_WIRELESS_OLD_REGULATORY is enabled 9473f2355cbSLuis R. Rodriguez * AND if CRDA is NOT present nothing will happen, if someone 9483f2355cbSLuis R. Rodriguez * wants to bother with 11d with OLD_REG you can add a timer. 9493f2355cbSLuis R. Rodriguez * If after x amount of time nothing happens you can call: 9503f2355cbSLuis R. Rodriguez * 9513f2355cbSLuis R. Rodriguez * return set_regdom(country_ie_regdomain); 9523f2355cbSLuis R. Rodriguez * 9533f2355cbSLuis R. Rodriguez * to intersect with the static rd 9543f2355cbSLuis R. Rodriguez */ 95502ba0b32SLuis R. Rodriguez return call_crda(alpha2); 956b2e1b302SLuis R. Rodriguez } 957b2e1b302SLuis R. Rodriguez 958be3d4810SJohannes Berg void regulatory_hint(struct wiphy *wiphy, const char *alpha2) 959b2e1b302SLuis R. Rodriguez { 960be3d4810SJohannes Berg BUG_ON(!alpha2); 961b2e1b302SLuis R. Rodriguez 962b2e1b302SLuis R. Rodriguez mutex_lock(&cfg80211_drv_mutex); 9633f2355cbSLuis R. Rodriguez __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2, 0, ENVIRON_ANY); 964b2e1b302SLuis R. Rodriguez mutex_unlock(&cfg80211_drv_mutex); 965b2e1b302SLuis R. Rodriguez } 966b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 967b2e1b302SLuis R. Rodriguez 9683f2355cbSLuis R. Rodriguez static bool reg_same_country_ie_hint(struct wiphy *wiphy, 9693f2355cbSLuis R. Rodriguez u32 country_ie_checksum) 9703f2355cbSLuis R. Rodriguez { 9713f2355cbSLuis R. Rodriguez if (!last_request->wiphy) 9723f2355cbSLuis R. Rodriguez return false; 9733f2355cbSLuis R. Rodriguez if (likely(last_request->wiphy != wiphy)) 9743f2355cbSLuis R. Rodriguez return !country_ie_integrity_changes(country_ie_checksum); 9753f2355cbSLuis R. Rodriguez /* We should not have let these through at this point, they 9763f2355cbSLuis R. Rodriguez * should have been picked up earlier by the first alpha2 check 9773f2355cbSLuis R. Rodriguez * on the device */ 9783f2355cbSLuis R. Rodriguez if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) 9793f2355cbSLuis R. Rodriguez return true; 9803f2355cbSLuis R. Rodriguez return false; 9813f2355cbSLuis R. Rodriguez } 9823f2355cbSLuis R. Rodriguez 9833f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 9843f2355cbSLuis R. Rodriguez u8 *country_ie, 9853f2355cbSLuis R. Rodriguez u8 country_ie_len) 9863f2355cbSLuis R. Rodriguez { 9873f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 9883f2355cbSLuis R. Rodriguez char alpha2[2]; 9893f2355cbSLuis R. Rodriguez u32 checksum = 0; 9903f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 9913f2355cbSLuis R. Rodriguez 9920f70f398SJohannes Berg if (!last_request) 9930f70f398SJohannes Berg return; 9940f70f398SJohannes Berg 9953f2355cbSLuis R. Rodriguez mutex_lock(&cfg80211_drv_mutex); 9963f2355cbSLuis R. Rodriguez 9973f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 9983f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 9993f2355cbSLuis R. Rodriguez goto out; 10003f2355cbSLuis R. Rodriguez 10013f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 10023f2355cbSLuis R. Rodriguez goto out; 10033f2355cbSLuis R. Rodriguez 10043f2355cbSLuis R. Rodriguez /* Pending country IE processing, this can happen after we 10053f2355cbSLuis R. Rodriguez * call CRDA and wait for a response if a beacon was received before 10063f2355cbSLuis R. Rodriguez * we were able to process the last regulatory_hint_11d() call */ 10073f2355cbSLuis R. Rodriguez if (country_ie_regdomain) 10083f2355cbSLuis R. Rodriguez goto out; 10093f2355cbSLuis R. Rodriguez 10103f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 10113f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 10123f2355cbSLuis R. Rodriguez 10133f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 10143f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 10153f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 10163f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 10173f2355cbSLuis R. Rodriguez 10183f2355cbSLuis R. Rodriguez /* We will run this for *every* beacon processed for the BSSID, so 10193f2355cbSLuis R. Rodriguez * we optimize an early check to exit out early if we don't have to 10203f2355cbSLuis R. Rodriguez * do anything */ 10213f2355cbSLuis R. Rodriguez if (likely(last_request->wiphy)) { 10223f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv_last_ie; 10233f2355cbSLuis R. Rodriguez 10243f2355cbSLuis R. Rodriguez drv_last_ie = wiphy_to_dev(last_request->wiphy); 10253f2355cbSLuis R. Rodriguez 10263f2355cbSLuis R. Rodriguez /* Lets keep this simple -- we trust the first AP 10273f2355cbSLuis R. Rodriguez * after we intersect with CRDA */ 10283f2355cbSLuis R. Rodriguez if (likely(last_request->wiphy == wiphy)) { 10293f2355cbSLuis R. Rodriguez /* Ignore IEs coming in on this wiphy with 10303f2355cbSLuis R. Rodriguez * the same alpha2 and environment cap */ 10313f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 10323f2355cbSLuis R. Rodriguez alpha2) && 10333f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 10343f2355cbSLuis R. Rodriguez goto out; 10353f2355cbSLuis R. Rodriguez } 10363f2355cbSLuis R. Rodriguez /* the wiphy moved on to another BSSID or the AP 10373f2355cbSLuis R. Rodriguez * was reconfigured. XXX: We need to deal with the 10383f2355cbSLuis R. Rodriguez * case where the user suspends and goes to goes 10393f2355cbSLuis R. Rodriguez * to another country, and then gets IEs from an 10403f2355cbSLuis R. Rodriguez * AP with different settings */ 10413f2355cbSLuis R. Rodriguez goto out; 10423f2355cbSLuis R. Rodriguez } else { 10433f2355cbSLuis R. Rodriguez /* Ignore IEs coming in on two separate wiphys with 10443f2355cbSLuis R. Rodriguez * the same alpha2 and environment cap */ 10453f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 10463f2355cbSLuis R. Rodriguez alpha2) && 10473f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 10483f2355cbSLuis R. Rodriguez goto out; 10493f2355cbSLuis R. Rodriguez } 10503f2355cbSLuis R. Rodriguez /* We could potentially intersect though */ 10513f2355cbSLuis R. Rodriguez goto out; 10523f2355cbSLuis R. Rodriguez } 10533f2355cbSLuis R. Rodriguez } 10543f2355cbSLuis R. Rodriguez 10553f2355cbSLuis R. Rodriguez rd = country_ie_2_rd(country_ie, country_ie_len, &checksum); 10563f2355cbSLuis R. Rodriguez if (!rd) 10573f2355cbSLuis R. Rodriguez goto out; 10583f2355cbSLuis R. Rodriguez 10593f2355cbSLuis R. Rodriguez /* This will not happen right now but we leave it here for the 10603f2355cbSLuis R. Rodriguez * the future when we want to add suspend/resume support and having 10613f2355cbSLuis R. Rodriguez * the user move to another country after doing so, or having the user 10623f2355cbSLuis R. Rodriguez * move to another AP. Right now we just trust the first AP. This is why 10633f2355cbSLuis R. Rodriguez * this is marked as likley(). If we hit this before we add this support 10643f2355cbSLuis R. Rodriguez * we want to be informed of it as it would indicate a mistake in the 10653f2355cbSLuis R. Rodriguez * current design */ 10663f2355cbSLuis R. Rodriguez if (likely(WARN_ON(reg_same_country_ie_hint(wiphy, checksum)))) 10673f2355cbSLuis R. Rodriguez goto out; 10683f2355cbSLuis R. Rodriguez 10693f2355cbSLuis R. Rodriguez /* We keep this around for when CRDA comes back with a response so 10703f2355cbSLuis R. Rodriguez * we can intersect with that */ 10713f2355cbSLuis R. Rodriguez country_ie_regdomain = rd; 10723f2355cbSLuis R. Rodriguez 10733f2355cbSLuis R. Rodriguez __regulatory_hint(wiphy, REGDOM_SET_BY_COUNTRY_IE, 10743f2355cbSLuis R. Rodriguez country_ie_regdomain->alpha2, checksum, env); 10753f2355cbSLuis R. Rodriguez 10763f2355cbSLuis R. Rodriguez out: 10773f2355cbSLuis R. Rodriguez mutex_unlock(&cfg80211_drv_mutex); 10783f2355cbSLuis R. Rodriguez } 10793f2355cbSLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint_11d); 1080b2e1b302SLuis R. Rodriguez 1081a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1082b2e1b302SLuis R. Rodriguez { 1083b2e1b302SLuis R. Rodriguez unsigned int i; 1084a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1085a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1086a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1087b2e1b302SLuis R. Rodriguez 1088b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), " 1089b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 1090b2e1b302SLuis R. Rodriguez 1091b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1092b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1093b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1094b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1095b2e1b302SLuis R. Rodriguez 1096b2e1b302SLuis R. Rodriguez /* There may not be documentation for max antenna gain 1097b2e1b302SLuis R. Rodriguez * in certain regions */ 1098b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1099b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1100b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 1101b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1102b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1103b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1104b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1105b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1106b2e1b302SLuis R. Rodriguez else 1107b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1108b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 1109b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1110b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1111b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1112b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1113b2e1b302SLuis R. Rodriguez } 1114b2e1b302SLuis R. Rodriguez } 1115b2e1b302SLuis R. Rodriguez 1116a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 1117b2e1b302SLuis R. Rodriguez { 1118b2e1b302SLuis R. Rodriguez 11193f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 11203f2355cbSLuis R. Rodriguez struct wiphy *wiphy = NULL; 11213f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv; 11223f2355cbSLuis R. Rodriguez 11233f2355cbSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { 11243f2355cbSLuis R. Rodriguez if (last_request->wiphy) { 11253f2355cbSLuis R. Rodriguez wiphy = last_request->wiphy; 11263f2355cbSLuis R. Rodriguez drv = wiphy_to_dev(wiphy); 11273f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 11283f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 11293f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0], 11303f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1]); 11313f2355cbSLuis R. Rodriguez } else 11323f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 11333f2355cbSLuis R. Rodriguez "domain intersected: \n"); 11343f2355cbSLuis R. Rodriguez } else 11353f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 11363f2355cbSLuis R. Rodriguez "intersected: \n"); 11373f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 1138b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 1139b2e1b302SLuis R. Rodriguez "domain updated:\n"); 1140b2e1b302SLuis R. Rodriguez else { 1141b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 1142b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1143b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 1144b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 1145b2e1b302SLuis R. Rodriguez else 1146b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1147b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 1148b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1149b2e1b302SLuis R. Rodriguez } 1150b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1151b2e1b302SLuis R. Rodriguez } 1152b2e1b302SLuis R. Rodriguez 11532df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 1154b2e1b302SLuis R. Rodriguez { 1155b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 1156b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1157b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1158b2e1b302SLuis R. Rodriguez } 1159b2e1b302SLuis R. Rodriguez 11603f2355cbSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 11613f2355cbSLuis R. Rodriguez static void reg_country_ie_process_debug( 11623f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 11633f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 11643f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 11653f2355cbSLuis R. Rodriguez { 11663f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Received country IE:\n"); 11673f2355cbSLuis R. Rodriguez print_regdomain_info(country_ie_regdomain); 11683f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); 11693f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 11703f2355cbSLuis R. Rodriguez if (intersected_rd) { 11713f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: We intersect both of these " 11723f2355cbSLuis R. Rodriguez "and get:\n"); 11733f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 11743f2355cbSLuis R. Rodriguez return; 11753f2355cbSLuis R. Rodriguez } 11763f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); 11773f2355cbSLuis R. Rodriguez } 11783f2355cbSLuis R. Rodriguez #else 11793f2355cbSLuis R. Rodriguez static inline void reg_country_ie_process_debug( 11803f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 11813f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 11823f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 11833f2355cbSLuis R. Rodriguez { 11843f2355cbSLuis R. Rodriguez } 11853f2355cbSLuis R. Rodriguez #endif 11863f2355cbSLuis R. Rodriguez 1187d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 1188a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 1189b2e1b302SLuis R. Rodriguez { 11909c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 11913f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv = NULL; 11923f2355cbSLuis R. Rodriguez struct wiphy *wiphy = NULL; 1193b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 1194b2e1b302SLuis R. Rodriguez 1195b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 1196f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1197b2e1b302SLuis R. Rodriguez return -EINVAL; 1198b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 1199b2e1b302SLuis R. Rodriguez return 0; 1200b2e1b302SLuis R. Rodriguez } 1201b2e1b302SLuis R. Rodriguez 1202b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 1203b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 1204b2e1b302SLuis R. Rodriguez return -EINVAL; 1205b2e1b302SLuis R. Rodriguez 1206f6037d09SJohannes Berg if (!last_request) 1207b2e1b302SLuis R. Rodriguez return -EINVAL; 1208b2e1b302SLuis R. Rodriguez 12093f2355cbSLuis R. Rodriguez /* Lets only bother proceeding on the same alpha2 if the current 12103f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 12113f2355cbSLuis R. Rodriguez * and the pending request came in from a country IE */ 12123f2355cbSLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) { 12133f2355cbSLuis R. Rodriguez /* If someone else asked us to change the rd lets only bother 12143f2355cbSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called */ 1215b2e1b302SLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 1216b2e1b302SLuis R. Rodriguez !regdom_changed(rd->alpha2)) 1217b2e1b302SLuis R. Rodriguez return -EINVAL; 12183f2355cbSLuis R. Rodriguez } 12193f2355cbSLuis R. Rodriguez 12203f2355cbSLuis R. Rodriguez wiphy = last_request->wiphy; 1221b2e1b302SLuis R. Rodriguez 1222b2e1b302SLuis R. Rodriguez /* Now lets set the regulatory domain, update all driver channels 1223b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 1224b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 1225b2e1b302SLuis R. Rodriguez * internal EEPROM data */ 1226b2e1b302SLuis R. Rodriguez 1227f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1228b2e1b302SLuis R. Rodriguez return -EINVAL; 1229b2e1b302SLuis R. Rodriguez 1230b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 1231b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 1232b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 1233b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 1234b2e1b302SLuis R. Rodriguez return -EINVAL; 1235b2e1b302SLuis R. Rodriguez } 1236b2e1b302SLuis R. Rodriguez 1237b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 1238b8295acdSLuis R. Rodriguez reset_regdomains(); 1239b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 1240b8295acdSLuis R. Rodriguez return 0; 1241b8295acdSLuis R. Rodriguez } 1242b8295acdSLuis R. Rodriguez 1243b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 1244b8295acdSLuis R. Rodriguez 1245b8295acdSLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) { 1246b8295acdSLuis R. Rodriguez 12479c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 12489c96477dSLuis R. Rodriguez if (!intersected_rd) 12499c96477dSLuis R. Rodriguez return -EINVAL; 1250b8295acdSLuis R. Rodriguez 1251b8295acdSLuis R. Rodriguez /* We can trash what CRDA provided now */ 12529c96477dSLuis R. Rodriguez kfree(rd); 1253b8295acdSLuis R. Rodriguez rd = NULL; 1254b8295acdSLuis R. Rodriguez 1255b8295acdSLuis R. Rodriguez reset_regdomains(); 1256b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 1257b8295acdSLuis R. Rodriguez 1258b8295acdSLuis R. Rodriguez return 0; 12599c96477dSLuis R. Rodriguez } 12609c96477dSLuis R. Rodriguez 12613f2355cbSLuis R. Rodriguez /* 12623f2355cbSLuis R. Rodriguez * Country IE requests are handled a bit differently, we intersect 12633f2355cbSLuis R. Rodriguez * the country IE rd with what CRDA believes that country should have 12643f2355cbSLuis R. Rodriguez */ 12653f2355cbSLuis R. Rodriguez 12663f2355cbSLuis R. Rodriguez BUG_ON(!country_ie_regdomain); 12673f2355cbSLuis R. Rodriguez 12683f2355cbSLuis R. Rodriguez if (rd != country_ie_regdomain) { 12693f2355cbSLuis R. Rodriguez /* Intersect what CRDA returned and our what we 12703f2355cbSLuis R. Rodriguez * had built from the Country IE received */ 12713f2355cbSLuis R. Rodriguez 12723f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, country_ie_regdomain); 12733f2355cbSLuis R. Rodriguez 12743f2355cbSLuis R. Rodriguez reg_country_ie_process_debug(rd, country_ie_regdomain, 12753f2355cbSLuis R. Rodriguez intersected_rd); 12763f2355cbSLuis R. Rodriguez 12773f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 12783f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 12793f2355cbSLuis R. Rodriguez } else { 12803f2355cbSLuis R. Rodriguez /* This would happen when CRDA was not present and 12813f2355cbSLuis R. Rodriguez * OLD_REGULATORY was enabled. We intersect our Country 12823f2355cbSLuis R. Rodriguez * IE rd and what was set on cfg80211 originally */ 12833f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 12843f2355cbSLuis R. Rodriguez } 12853f2355cbSLuis R. Rodriguez 12863f2355cbSLuis R. Rodriguez if (!intersected_rd) 12873f2355cbSLuis R. Rodriguez return -EINVAL; 12883f2355cbSLuis R. Rodriguez 12893f2355cbSLuis R. Rodriguez drv = wiphy_to_dev(wiphy); 12903f2355cbSLuis R. Rodriguez 12913f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0] = rd->alpha2[0]; 12923f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1] = rd->alpha2[1]; 12933f2355cbSLuis R. Rodriguez drv->env = last_request->country_ie_env; 12943f2355cbSLuis R. Rodriguez 12953f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 12963f2355cbSLuis R. Rodriguez 12973f2355cbSLuis R. Rodriguez kfree(rd); 12983f2355cbSLuis R. Rodriguez rd = NULL; 12993f2355cbSLuis R. Rodriguez 1300b8295acdSLuis R. Rodriguez reset_regdomains(); 13013f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 1302b2e1b302SLuis R. Rodriguez 1303b2e1b302SLuis R. Rodriguez return 0; 1304b2e1b302SLuis R. Rodriguez } 1305b2e1b302SLuis R. Rodriguez 1306b2e1b302SLuis R. Rodriguez 1307b2e1b302SLuis R. Rodriguez /* Use this call to set the current regulatory domain. Conflicts with 1308b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 1309d2372b31SJohannes Berg * kmalloc'd the rd structure. Caller must hold cfg80211_drv_mutex */ 1310a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 1311b2e1b302SLuis R. Rodriguez { 1312b2e1b302SLuis R. Rodriguez int r; 1313b2e1b302SLuis R. Rodriguez 1314b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 1315b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 1316d2372b31SJohannes Berg if (r) { 1317d2372b31SJohannes Berg kfree(rd); 1318b2e1b302SLuis R. Rodriguez return r; 1319d2372b31SJohannes Berg } 1320b2e1b302SLuis R. Rodriguez 1321b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 1322a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 1323b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 1324b2e1b302SLuis R. Rodriguez 1325b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 1326f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 1327b2e1b302SLuis R. Rodriguez 1328a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 1329b2e1b302SLuis R. Rodriguez 1330b2e1b302SLuis R. Rodriguez return r; 1331b2e1b302SLuis R. Rodriguez } 1332b2e1b302SLuis R. Rodriguez 13333f2355cbSLuis R. Rodriguez /* Caller must hold cfg80211_drv_mutex */ 13343f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 13353f2355cbSLuis R. Rodriguez { 13364a4f4d80SJohannes Berg if (!last_request || !last_request->wiphy) 13373f2355cbSLuis R. Rodriguez return; 13383f2355cbSLuis R. Rodriguez if (last_request->wiphy != wiphy) 13393f2355cbSLuis R. Rodriguez return; 13403f2355cbSLuis R. Rodriguez last_request->wiphy = NULL; 13413f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 13423f2355cbSLuis R. Rodriguez } 13433f2355cbSLuis R. Rodriguez 1344b2e1b302SLuis R. Rodriguez int regulatory_init(void) 1345b2e1b302SLuis R. Rodriguez { 1346734366deSJohannes Berg int err; 1347734366deSJohannes Berg 1348b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 1349b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 1350b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 1351734366deSJohannes Berg 1352734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 1353a3d2eaf0SJohannes Berg cfg80211_regdomain = static_regdom(ieee80211_regdom); 1354734366deSJohannes Berg 1355942b25cfSJohannes Berg printk(KERN_INFO "cfg80211: Using static regulatory domain info\n"); 1356734366deSJohannes Berg print_regdomain_info(cfg80211_regdomain); 1357734366deSJohannes Berg /* The old code still requests for a new regdomain and if 1358734366deSJohannes Berg * you have CRDA you get it updated, otherwise you get 1359734366deSJohannes Berg * stuck with the static values. We ignore "EU" code as 1360734366deSJohannes Berg * that is not a valid ISO / IEC 3166 alpha2 */ 1361ac9440a4SJohannes Berg if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U') 1362734366deSJohannes Berg err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, 13633f2355cbSLuis R. Rodriguez ieee80211_regdom, 0, ENVIRON_ANY); 1364734366deSJohannes Berg #else 1365a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 1366734366deSJohannes Berg 13673f2355cbSLuis R. Rodriguez err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", 0, ENVIRON_ANY); 1368734366deSJohannes Berg if (err) 1369734366deSJohannes Berg printk(KERN_ERR "cfg80211: calling CRDA failed - " 1370734366deSJohannes Berg "unable to update world regulatory domain, " 1371734366deSJohannes Berg "using static definition\n"); 1372734366deSJohannes Berg #endif 1373734366deSJohannes Berg 1374b2e1b302SLuis R. Rodriguez return 0; 1375b2e1b302SLuis R. Rodriguez } 1376b2e1b302SLuis R. Rodriguez 1377b2e1b302SLuis R. Rodriguez void regulatory_exit(void) 1378b2e1b302SLuis R. Rodriguez { 1379b2e1b302SLuis R. Rodriguez mutex_lock(&cfg80211_drv_mutex); 1380734366deSJohannes Berg 1381b2e1b302SLuis R. Rodriguez reset_regdomains(); 1382734366deSJohannes Berg 13833f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 13843f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 13853f2355cbSLuis R. Rodriguez 1386f6037d09SJohannes Berg kfree(last_request); 1387f6037d09SJohannes Berg 1388b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 1389734366deSJohannes Berg 1390b2e1b302SLuis R. Rodriguez mutex_unlock(&cfg80211_drv_mutex); 13918318d78aSJohannes Berg } 1392