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 4240c7dc45dSLuis R. Rodriguez /** 4250c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 4260c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 4270c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 4280c7dc45dSLuis R. Rodriguez * 4290c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 4300c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 4310c7dc45dSLuis R. Rodriguez * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is 4320c7dc45dSLuis R. Rodriguez * safe for now to assume that a frequency rule should not be part of a 4330c7dc45dSLuis R. Rodriguez * frequency's band if the start freq or end freq are off by more than 2 GHz. 4340c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 4350c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 4360c7dc45dSLuis R. Rodriguez **/ 4370c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 4380c7dc45dSLuis R. Rodriguez u32 freq_khz) 4390c7dc45dSLuis R. Rodriguez { 4400c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 4410c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4420c7dc45dSLuis R. Rodriguez return true; 4430c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4440c7dc45dSLuis R. Rodriguez return true; 4450c7dc45dSLuis R. Rodriguez return false; 4460c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 4470c7dc45dSLuis R. Rodriguez } 4480c7dc45dSLuis R. Rodriguez 4493f2355cbSLuis R. Rodriguez /* Converts a country IE to a regulatory domain. A regulatory domain 4503f2355cbSLuis R. Rodriguez * structure has a lot of information which the IE doesn't yet have, 4513f2355cbSLuis R. Rodriguez * so for the other values we use upper max values as we will intersect 4523f2355cbSLuis R. Rodriguez * with our userspace regulatory agent to get lower bounds. */ 4533f2355cbSLuis R. Rodriguez static struct ieee80211_regdomain *country_ie_2_rd( 4543f2355cbSLuis R. Rodriguez u8 *country_ie, 4553f2355cbSLuis R. Rodriguez u8 country_ie_len, 4563f2355cbSLuis R. Rodriguez u32 *checksum) 4573f2355cbSLuis R. Rodriguez { 4583f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 4593f2355cbSLuis R. Rodriguez unsigned int i = 0; 4603f2355cbSLuis R. Rodriguez char alpha2[2]; 4613f2355cbSLuis R. Rodriguez u32 flags = 0; 4623f2355cbSLuis R. Rodriguez u32 num_rules = 0, size_of_regd = 0; 4633f2355cbSLuis R. Rodriguez u8 *triplets_start = NULL; 4643f2355cbSLuis R. Rodriguez u8 len_at_triplet = 0; 4653f2355cbSLuis R. Rodriguez /* the last channel we have registered in a subband (triplet) */ 4663f2355cbSLuis R. Rodriguez int last_sub_max_channel = 0; 4673f2355cbSLuis R. Rodriguez 4683f2355cbSLuis R. Rodriguez *checksum = 0xDEADBEEF; 4693f2355cbSLuis R. Rodriguez 4703f2355cbSLuis R. Rodriguez /* Country IE requirements */ 4713f2355cbSLuis R. Rodriguez BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || 4723f2355cbSLuis R. Rodriguez country_ie_len & 0x01); 4733f2355cbSLuis R. Rodriguez 4743f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 4753f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 4763f2355cbSLuis R. Rodriguez 4773f2355cbSLuis R. Rodriguez /* 4783f2355cbSLuis R. Rodriguez * Third octet can be: 4793f2355cbSLuis R. Rodriguez * 'I' - Indoor 4803f2355cbSLuis R. Rodriguez * 'O' - Outdoor 4813f2355cbSLuis R. Rodriguez * 4823f2355cbSLuis R. Rodriguez * anything else we assume is no restrictions 4833f2355cbSLuis R. Rodriguez */ 4843f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 4853f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_OUTDOOR; 4863f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 4873f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_INDOOR; 4883f2355cbSLuis R. Rodriguez 4893f2355cbSLuis R. Rodriguez country_ie += 3; 4903f2355cbSLuis R. Rodriguez country_ie_len -= 3; 4913f2355cbSLuis R. Rodriguez 4923f2355cbSLuis R. Rodriguez triplets_start = country_ie; 4933f2355cbSLuis R. Rodriguez len_at_triplet = country_ie_len; 4943f2355cbSLuis R. Rodriguez 4953f2355cbSLuis R. Rodriguez *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); 4963f2355cbSLuis R. Rodriguez 4973f2355cbSLuis R. Rodriguez /* We need to build a reg rule for each triplet, but first we must 4983f2355cbSLuis R. Rodriguez * calculate the number of reg rules we will need. We will need one 4993f2355cbSLuis R. Rodriguez * for each channel subband */ 5003f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 5013f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 5023f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 5033f2355cbSLuis R. Rodriguez int cur_sub_max_channel = 0, cur_channel = 0; 5043f2355cbSLuis R. Rodriguez 5053f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 5063f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 5073f2355cbSLuis R. Rodriguez country_ie += 3; 5083f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5093f2355cbSLuis R. Rodriguez continue; 5103f2355cbSLuis R. Rodriguez } 5113f2355cbSLuis R. Rodriguez 5123f2355cbSLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 5133f2355cbSLuis R. Rodriguez cur_sub_max_channel = ieee80211_channel_to_frequency( 5143f2355cbSLuis R. Rodriguez cur_channel + triplet->chans.num_channels); 5153f2355cbSLuis R. Rodriguez 5163f2355cbSLuis R. Rodriguez /* Basic sanity check */ 5173f2355cbSLuis R. Rodriguez if (cur_sub_max_channel < cur_channel) 5183f2355cbSLuis R. Rodriguez return NULL; 5193f2355cbSLuis R. Rodriguez 5203f2355cbSLuis R. Rodriguez /* Do not allow overlapping channels. Also channels 5213f2355cbSLuis R. Rodriguez * passed in each subband must be monotonically 5223f2355cbSLuis R. Rodriguez * increasing */ 5233f2355cbSLuis R. Rodriguez if (last_sub_max_channel) { 5243f2355cbSLuis R. Rodriguez if (cur_channel <= last_sub_max_channel) 5253f2355cbSLuis R. Rodriguez return NULL; 5263f2355cbSLuis R. Rodriguez if (cur_sub_max_channel <= last_sub_max_channel) 5273f2355cbSLuis R. Rodriguez return NULL; 5283f2355cbSLuis R. Rodriguez } 5293f2355cbSLuis R. Rodriguez 5303f2355cbSLuis R. Rodriguez /* When dot11RegulatoryClassesRequired is supported 5313f2355cbSLuis R. Rodriguez * we can throw ext triplets as part of this soup, 5323f2355cbSLuis R. Rodriguez * for now we don't care when those change as we 5333f2355cbSLuis R. Rodriguez * don't support them */ 5343f2355cbSLuis R. Rodriguez *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | 5353f2355cbSLuis R. Rodriguez ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | 5363f2355cbSLuis R. Rodriguez ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); 5373f2355cbSLuis R. Rodriguez 5383f2355cbSLuis R. Rodriguez last_sub_max_channel = cur_sub_max_channel; 5393f2355cbSLuis R. Rodriguez 5403f2355cbSLuis R. Rodriguez country_ie += 3; 5413f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5423f2355cbSLuis R. Rodriguez num_rules++; 5433f2355cbSLuis R. Rodriguez 5443f2355cbSLuis R. Rodriguez /* Note: this is not a IEEE requirement but 5453f2355cbSLuis R. Rodriguez * simply a memory requirement */ 5463f2355cbSLuis R. Rodriguez if (num_rules > NL80211_MAX_SUPP_REG_RULES) 5473f2355cbSLuis R. Rodriguez return NULL; 5483f2355cbSLuis R. Rodriguez } 5493f2355cbSLuis R. Rodriguez 5503f2355cbSLuis R. Rodriguez country_ie = triplets_start; 5513f2355cbSLuis R. Rodriguez country_ie_len = len_at_triplet; 5523f2355cbSLuis R. Rodriguez 5533f2355cbSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 5543f2355cbSLuis R. Rodriguez (num_rules * sizeof(struct ieee80211_reg_rule)); 5553f2355cbSLuis R. Rodriguez 5563f2355cbSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 5573f2355cbSLuis R. Rodriguez if (!rd) 5583f2355cbSLuis R. Rodriguez return NULL; 5593f2355cbSLuis R. Rodriguez 5603f2355cbSLuis R. Rodriguez rd->n_reg_rules = num_rules; 5613f2355cbSLuis R. Rodriguez rd->alpha2[0] = alpha2[0]; 5623f2355cbSLuis R. Rodriguez rd->alpha2[1] = alpha2[1]; 5633f2355cbSLuis R. Rodriguez 5643f2355cbSLuis R. Rodriguez /* This time around we fill in the rd */ 5653f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 56602e68a3dSLuis R. Rodriguez int end_channel = 0; 5673f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 5683f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 5693f2355cbSLuis R. Rodriguez struct ieee80211_reg_rule *reg_rule = NULL; 5703f2355cbSLuis R. Rodriguez struct ieee80211_freq_range *freq_range = NULL; 5713f2355cbSLuis R. Rodriguez struct ieee80211_power_rule *power_rule = NULL; 5723f2355cbSLuis R. Rodriguez 5733f2355cbSLuis R. Rodriguez /* Must parse if dot11RegulatoryClassesRequired is true, 5743f2355cbSLuis R. Rodriguez * we don't support this yet */ 5753f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 5763f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 5773f2355cbSLuis R. Rodriguez country_ie += 3; 5783f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5793f2355cbSLuis R. Rodriguez continue; 5803f2355cbSLuis R. Rodriguez } 5813f2355cbSLuis R. Rodriguez 5823f2355cbSLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 5833f2355cbSLuis R. Rodriguez freq_range = ®_rule->freq_range; 5843f2355cbSLuis R. Rodriguez power_rule = ®_rule->power_rule; 5853f2355cbSLuis R. Rodriguez 5863f2355cbSLuis R. Rodriguez reg_rule->flags = flags; 5873f2355cbSLuis R. Rodriguez 58802e68a3dSLuis R. Rodriguez /* 2 GHz */ 58902e68a3dSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 59002e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 59102e68a3dSLuis R. Rodriguez triplet->chans.num_channels; 59202e68a3dSLuis R. Rodriguez else 59302e68a3dSLuis R. Rodriguez /* 59402e68a3dSLuis R. Rodriguez * 5 GHz -- For example in country IEs if the first 59502e68a3dSLuis R. Rodriguez * channel given is 36 and the number of channels is 4 59602e68a3dSLuis R. Rodriguez * then the individual channel numbers defined for the 59702e68a3dSLuis R. Rodriguez * 5 GHz PHY by these parameters are: 36, 40, 44, and 48 59802e68a3dSLuis R. Rodriguez * and not 36, 37, 38, 39. 59902e68a3dSLuis R. Rodriguez * 60002e68a3dSLuis R. Rodriguez * See: http://tinyurl.com/11d-clarification 60102e68a3dSLuis R. Rodriguez */ 60202e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 60302e68a3dSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 60402e68a3dSLuis R. Rodriguez 6053f2355cbSLuis R. Rodriguez /* The +10 is since the regulatory domain expects 6063f2355cbSLuis R. Rodriguez * the actual band edge, not the center of freq for 6073f2355cbSLuis R. Rodriguez * its start and end freqs, assuming 20 MHz bandwidth on 6083f2355cbSLuis R. Rodriguez * the channels passed */ 6093f2355cbSLuis R. Rodriguez freq_range->start_freq_khz = 6103f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 6113f2355cbSLuis R. Rodriguez triplet->chans.first_channel) - 10); 6123f2355cbSLuis R. Rodriguez freq_range->end_freq_khz = 6133f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 61402e68a3dSLuis R. Rodriguez end_channel) + 10); 6153f2355cbSLuis R. Rodriguez 6163f2355cbSLuis R. Rodriguez /* Large arbitrary values, we intersect later */ 6173f2355cbSLuis R. Rodriguez /* Increment this if we ever support >= 40 MHz channels 6183f2355cbSLuis R. Rodriguez * in IEEE 802.11 */ 6193f2355cbSLuis R. Rodriguez freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); 6203f2355cbSLuis R. Rodriguez power_rule->max_antenna_gain = DBI_TO_MBI(100); 6213f2355cbSLuis R. Rodriguez power_rule->max_eirp = DBM_TO_MBM(100); 6223f2355cbSLuis R. Rodriguez 6233f2355cbSLuis R. Rodriguez country_ie += 3; 6243f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6253f2355cbSLuis R. Rodriguez i++; 6263f2355cbSLuis R. Rodriguez 6273f2355cbSLuis R. Rodriguez BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); 6283f2355cbSLuis R. Rodriguez } 6293f2355cbSLuis R. Rodriguez 6303f2355cbSLuis R. Rodriguez return rd; 6313f2355cbSLuis R. Rodriguez } 6323f2355cbSLuis R. Rodriguez 6333f2355cbSLuis R. Rodriguez 6349c96477dSLuis R. Rodriguez /* Helper for regdom_intersect(), this does the real 6359c96477dSLuis R. Rodriguez * mathematical intersection fun */ 6369c96477dSLuis R. Rodriguez static int reg_rules_intersect( 6379c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 6389c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 6399c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 6409c96477dSLuis R. Rodriguez { 6419c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 6429c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 6439c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 6449c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 6459c96477dSLuis R. Rodriguez u32 freq_diff; 6469c96477dSLuis R. Rodriguez 6479c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 6489c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 6499c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 6509c96477dSLuis R. Rodriguez 6519c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 6529c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 6539c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 6549c96477dSLuis R. Rodriguez 6559c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 6569c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 6579c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 6589c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 6599c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 6609c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 6619c96477dSLuis R. Rodriguez 6629c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 6639c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 6649c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 6659c96477dSLuis R. Rodriguez 6669c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 6679c96477dSLuis R. Rodriguez power_rule2->max_eirp); 6689c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 6699c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 6709c96477dSLuis R. Rodriguez 6719c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 6729c96477dSLuis R. Rodriguez 6739c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 6749c96477dSLuis R. Rodriguez return -EINVAL; 6759c96477dSLuis R. Rodriguez 6769c96477dSLuis R. Rodriguez return 0; 6779c96477dSLuis R. Rodriguez } 6789c96477dSLuis R. Rodriguez 6799c96477dSLuis R. Rodriguez /** 6809c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 6819c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 6829c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 6839c96477dSLuis R. Rodriguez * 6849c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 6859c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 6869c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 6879c96477dSLuis R. Rodriguez * 6889c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 6899c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 6909c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 6919c96477dSLuis R. Rodriguez */ 6929c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 6939c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 6949c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 6959c96477dSLuis R. Rodriguez { 6969c96477dSLuis R. Rodriguez int r, size_of_regd; 6979c96477dSLuis R. Rodriguez unsigned int x, y; 6989c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 6999c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 7009c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 7019c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 7029c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 7039c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 7049c96477dSLuis R. Rodriguez 7059c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 7069c96477dSLuis R. Rodriguez intersected_rule = &irule; 7079c96477dSLuis R. Rodriguez 7089c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 7099c96477dSLuis R. Rodriguez 7109c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 7119c96477dSLuis R. Rodriguez return NULL; 7129c96477dSLuis R. Rodriguez 7139c96477dSLuis R. Rodriguez /* First we get a count of the rules we'll need, then we actually 7149c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 7159c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 7169c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 7179c96477dSLuis R. Rodriguez * All rules that do check out OK are valid. */ 7189c96477dSLuis R. Rodriguez 7199c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7209c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7219c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7229c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 7239c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 7249c96477dSLuis R. Rodriguez intersected_rule)) 7259c96477dSLuis R. Rodriguez num_rules++; 7269c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 7279c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 7289c96477dSLuis R. Rodriguez } 7299c96477dSLuis R. Rodriguez } 7309c96477dSLuis R. Rodriguez 7319c96477dSLuis R. Rodriguez if (!num_rules) 7329c96477dSLuis R. Rodriguez return NULL; 7339c96477dSLuis R. Rodriguez 7349c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 7359c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 7369c96477dSLuis R. Rodriguez 7379c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 7389c96477dSLuis R. Rodriguez if (!rd) 7399c96477dSLuis R. Rodriguez return NULL; 7409c96477dSLuis R. Rodriguez 7419c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7429c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7439c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7449c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 7459c96477dSLuis R. Rodriguez /* This time around instead of using the stack lets 7469c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 7479c96477dSLuis R. Rodriguez * a memcpy() */ 7489c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 7499c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 7509c96477dSLuis R. Rodriguez intersected_rule); 7519c96477dSLuis R. Rodriguez /* No need to memset here the intersected rule here as 7529c96477dSLuis R. Rodriguez * we're not using the stack anymore */ 7539c96477dSLuis R. Rodriguez if (r) 7549c96477dSLuis R. Rodriguez continue; 7559c96477dSLuis R. Rodriguez rule_idx++; 7569c96477dSLuis R. Rodriguez } 7579c96477dSLuis R. Rodriguez } 7589c96477dSLuis R. Rodriguez 7599c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 7609c96477dSLuis R. Rodriguez kfree(rd); 7619c96477dSLuis R. Rodriguez return NULL; 7629c96477dSLuis R. Rodriguez } 7639c96477dSLuis R. Rodriguez 7649c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 7659c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 7669c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 7679c96477dSLuis R. Rodriguez 7689c96477dSLuis R. Rodriguez return rd; 7699c96477dSLuis R. Rodriguez } 7709c96477dSLuis R. Rodriguez 771b2e1b302SLuis R. Rodriguez /* XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 772b2e1b302SLuis R. Rodriguez * want to just have the channel structure use these */ 773b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 774b2e1b302SLuis R. Rodriguez { 775b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 776b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 777b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 778b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 779b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 780b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 781b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 782b2e1b302SLuis R. Rodriguez return channel_flags; 783b2e1b302SLuis R. Rodriguez } 784b2e1b302SLuis R. Rodriguez 785b2e1b302SLuis R. Rodriguez /** 786b2e1b302SLuis R. Rodriguez * freq_reg_info - get regulatory information for the given frequency 787b2e1b302SLuis R. Rodriguez * @center_freq: Frequency in KHz for which we want regulatory information for 788b2e1b302SLuis R. Rodriguez * @bandwidth: the bandwidth requirement you have in KHz, if you do not have one 789b2e1b302SLuis R. Rodriguez * you can set this to 0. If this frequency is allowed we then set 790b2e1b302SLuis R. Rodriguez * this value to the maximum allowed bandwidth. 791b2e1b302SLuis R. Rodriguez * @reg_rule: the regulatory rule which we have for this frequency 792b2e1b302SLuis R. Rodriguez * 7930c7dc45dSLuis R. Rodriguez * Use this function to get the regulatory rule for a specific frequency on 7940c7dc45dSLuis R. Rodriguez * a given wireless device. If the device has a specific regulatory domain 7950c7dc45dSLuis R. Rodriguez * it wants to follow we respect that unless a country IE has been received 7960c7dc45dSLuis R. Rodriguez * and processed already. 7970c7dc45dSLuis R. Rodriguez * 7980c7dc45dSLuis R. Rodriguez * Returns 0 if it was able to find a valid regulatory rule which does 7990c7dc45dSLuis R. Rodriguez * apply to the given center_freq otherwise it returns non-zero. It will 8000c7dc45dSLuis R. Rodriguez * also return -ERANGE if we determine the given center_freq does not even have 8010c7dc45dSLuis R. Rodriguez * a regulatory rule for a frequency range in the center_freq's band. See 8020c7dc45dSLuis R. Rodriguez * freq_in_rule_band() for our current definition of a band -- this is purely 8030c7dc45dSLuis R. Rodriguez * subjective and right now its 802.11 specific. 8048318d78aSJohannes Berg */ 805b2e1b302SLuis R. Rodriguez static int freq_reg_info(u32 center_freq, u32 *bandwidth, 806b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 8078318d78aSJohannes Berg { 8088318d78aSJohannes Berg int i; 8090c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 810b2e1b302SLuis R. Rodriguez u32 max_bandwidth = 0; 8118318d78aSJohannes Berg 812b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 813b2e1b302SLuis R. Rodriguez return -EINVAL; 814b2e1b302SLuis R. Rodriguez 815b2e1b302SLuis R. Rodriguez for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) { 816b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 817b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 818b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 819b2e1b302SLuis R. Rodriguez 820b2e1b302SLuis R. Rodriguez rr = &cfg80211_regdomain->reg_rules[i]; 821b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 822b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 8230c7dc45dSLuis R. Rodriguez 8240c7dc45dSLuis R. Rodriguez /* We only need to know if one frequency rule was 8250c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 8260c7dc45dSLuis R. Rodriguez * not overwrite it once found */ 8270c7dc45dSLuis R. Rodriguez if (!band_rule_found) 8280c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 8290c7dc45dSLuis R. Rodriguez 830b2e1b302SLuis R. Rodriguez max_bandwidth = freq_max_bandwidth(fr, center_freq); 8310c7dc45dSLuis R. Rodriguez 832b2e1b302SLuis R. Rodriguez if (max_bandwidth && *bandwidth <= max_bandwidth) { 833b2e1b302SLuis R. Rodriguez *reg_rule = rr; 834b2e1b302SLuis R. Rodriguez *bandwidth = max_bandwidth; 8358318d78aSJohannes Berg break; 8368318d78aSJohannes Berg } 8378318d78aSJohannes Berg } 8388318d78aSJohannes Berg 8390c7dc45dSLuis R. Rodriguez if (!band_rule_found) 8400c7dc45dSLuis R. Rodriguez return -ERANGE; 8410c7dc45dSLuis R. Rodriguez 842b2e1b302SLuis R. Rodriguez return !max_bandwidth; 843b2e1b302SLuis R. Rodriguez } 844b2e1b302SLuis R. Rodriguez 845a92a3ce7SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, 846a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 847b2e1b302SLuis R. Rodriguez { 848b2e1b302SLuis R. Rodriguez int r; 849a92a3ce7SLuis R. Rodriguez u32 flags; 850b2e1b302SLuis R. Rodriguez u32 max_bandwidth = 0; 851b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 852b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 853a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 854a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 855a92a3ce7SLuis R. Rodriguez 856a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 857a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 858a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 859a92a3ce7SLuis R. Rodriguez 860a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 861b2e1b302SLuis R. Rodriguez 862b2e1b302SLuis R. Rodriguez r = freq_reg_info(MHZ_TO_KHZ(chan->center_freq), 863b2e1b302SLuis R. Rodriguez &max_bandwidth, ®_rule); 864b2e1b302SLuis R. Rodriguez 865b2e1b302SLuis R. Rodriguez if (r) { 8660c7dc45dSLuis R. Rodriguez /* This means no regulatory rule was found in the country IE 8670c7dc45dSLuis R. Rodriguez * with a frequency range on the center_freq's band, since 8680c7dc45dSLuis R. Rodriguez * IEEE-802.11 allows for a country IE to have a subset of the 8690c7dc45dSLuis R. Rodriguez * regulatory information provided in a country we ignore 8700c7dc45dSLuis R. Rodriguez * disabling the channel unless at least one reg rule was 8710c7dc45dSLuis R. Rodriguez * found on the center_freq's band. For details see this 8720c7dc45dSLuis R. Rodriguez * clarification: 8730c7dc45dSLuis R. Rodriguez * 8740c7dc45dSLuis R. Rodriguez * http://tinyurl.com/11d-clarification 8750c7dc45dSLuis R. Rodriguez */ 8760c7dc45dSLuis R. Rodriguez if (r == -ERANGE && 8770c7dc45dSLuis R. Rodriguez last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { 8780c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 8790c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Leaving channel %d MHz " 8800c7dc45dSLuis R. Rodriguez "intact on %s - no rule found in band on " 8810c7dc45dSLuis R. Rodriguez "Country IE\n", 8820c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 8830c7dc45dSLuis R. Rodriguez #endif 8840c7dc45dSLuis R. Rodriguez } else { 8850c7dc45dSLuis R. Rodriguez /* In this case we know the country IE has at least one reg rule 8860c7dc45dSLuis R. Rodriguez * for the band so we respect its band definitions */ 8870c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 8880c7dc45dSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) 8890c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Disabling " 8900c7dc45dSLuis R. Rodriguez "channel %d MHz on %s due to " 8910c7dc45dSLuis R. Rodriguez "Country IE\n", 8920c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 8930c7dc45dSLuis R. Rodriguez #endif 8948318d78aSJohannes Berg flags |= IEEE80211_CHAN_DISABLED; 8958318d78aSJohannes Berg chan->flags = flags; 8960c7dc45dSLuis R. Rodriguez } 8978318d78aSJohannes Berg return; 8988318d78aSJohannes Berg } 8998318d78aSJohannes Berg 900b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 901b2e1b302SLuis R. Rodriguez 902b2e1b302SLuis R. Rodriguez chan->flags = flags | map_regdom_flags(reg_rule->flags); 9038318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 904b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 905b2e1b302SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); 906253898c4SJohn W. Linville if (chan->orig_mpwr) 907b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 908b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 909253898c4SJohn W. Linville else 910b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 9118318d78aSJohannes Berg } 9128318d78aSJohannes Berg 913a92a3ce7SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) 9148318d78aSJohannes Berg { 915a92a3ce7SLuis R. Rodriguez unsigned int i; 916a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 917a92a3ce7SLuis R. Rodriguez 918a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 919a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 9208318d78aSJohannes Berg 9218318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 922a92a3ce7SLuis R. Rodriguez handle_channel(wiphy, band, i); 9238318d78aSJohannes Berg } 9248318d78aSJohannes Berg 92514b9815aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, enum reg_set_by setby) 92614b9815aSLuis R. Rodriguez { 92714b9815aSLuis R. Rodriguez if (!last_request) 92814b9815aSLuis R. Rodriguez return true; 92914b9815aSLuis R. Rodriguez if (setby == REGDOM_SET_BY_CORE && 93014b9815aSLuis R. Rodriguez wiphy->fw_handles_regulatory) 93114b9815aSLuis R. Rodriguez return true; 93214b9815aSLuis R. Rodriguez return false; 93314b9815aSLuis R. Rodriguez } 93414b9815aSLuis R. Rodriguez 935b2e1b302SLuis R. Rodriguez static void update_all_wiphy_regulatory(enum reg_set_by setby) 936b2e1b302SLuis R. Rodriguez { 937b2e1b302SLuis R. Rodriguez struct cfg80211_registered_device *drv; 938b2e1b302SLuis R. Rodriguez 939b2e1b302SLuis R. Rodriguez list_for_each_entry(drv, &cfg80211_drv_list, list) 94014b9815aSLuis R. Rodriguez if (!ignore_reg_update(&drv->wiphy, setby)) 941b2e1b302SLuis R. Rodriguez wiphy_update_regulatory(&drv->wiphy, setby); 942b2e1b302SLuis R. Rodriguez } 943b2e1b302SLuis R. Rodriguez 944b2e1b302SLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby) 9458318d78aSJohannes Berg { 9468318d78aSJohannes Berg enum ieee80211_band band; 947b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 9488318d78aSJohannes Berg if (wiphy->bands[band]) 949a92a3ce7SLuis R. Rodriguez handle_band(wiphy, band); 950560e28e1SLuis R. Rodriguez } 951b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 952b2e1b302SLuis R. Rodriguez wiphy->reg_notifier(wiphy, setby); 953b2e1b302SLuis R. Rodriguez } 954b2e1b302SLuis R. Rodriguez 9559c96477dSLuis R. Rodriguez /* Return value which can be used by ignore_request() to indicate 9569c96477dSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains */ 9579c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 9589c96477dSLuis R. Rodriguez 95984fa4f43SJohannes Berg /* This has the logic which determines when a new request 96084fa4f43SJohannes Berg * should be ignored. */ 96184fa4f43SJohannes Berg static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by, 96284fa4f43SJohannes Berg const char *alpha2) 96384fa4f43SJohannes Berg { 96484fa4f43SJohannes Berg /* All initial requests are respected */ 96584fa4f43SJohannes Berg if (!last_request) 96684fa4f43SJohannes Berg return 0; 96784fa4f43SJohannes Berg 96884fa4f43SJohannes Berg switch (set_by) { 96984fa4f43SJohannes Berg case REGDOM_SET_BY_INIT: 97084fa4f43SJohannes Berg return -EINVAL; 97184fa4f43SJohannes Berg case REGDOM_SET_BY_CORE: 97284fa4f43SJohannes Berg /* 97384fa4f43SJohannes Berg * Always respect new wireless core hints, should only happen 97484fa4f43SJohannes Berg * when updating the world regulatory domain at init. 97584fa4f43SJohannes Berg */ 97684fa4f43SJohannes Berg return 0; 97784fa4f43SJohannes Berg case REGDOM_SET_BY_COUNTRY_IE: 97884fa4f43SJohannes Berg if (unlikely(!is_an_alpha2(alpha2))) 97984fa4f43SJohannes Berg return -EINVAL; 98084fa4f43SJohannes Berg if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { 98184fa4f43SJohannes Berg if (last_request->wiphy != wiphy) { 98284fa4f43SJohannes Berg /* 98384fa4f43SJohannes Berg * Two cards with two APs claiming different 98484fa4f43SJohannes Berg * different Country IE alpha2s. We could 98584fa4f43SJohannes Berg * intersect them, but that seems unlikely 98684fa4f43SJohannes Berg * to be correct. Reject second one for now. 98784fa4f43SJohannes Berg */ 98884fa4f43SJohannes Berg if (!alpha2_equal(alpha2, 98984fa4f43SJohannes Berg cfg80211_regdomain->alpha2)) 99084fa4f43SJohannes Berg return -EOPNOTSUPP; 99184fa4f43SJohannes Berg return -EALREADY; 99284fa4f43SJohannes Berg } 9933f2355cbSLuis R. Rodriguez /* Two consecutive Country IE hints on the same wiphy. 9943f2355cbSLuis R. Rodriguez * This should be picked up early by the driver/stack */ 9953f2355cbSLuis R. Rodriguez if (WARN_ON(!alpha2_equal(cfg80211_regdomain->alpha2, 9963f2355cbSLuis R. Rodriguez alpha2))) 99784fa4f43SJohannes Berg return 0; 99884fa4f43SJohannes Berg return -EALREADY; 99984fa4f43SJohannes Berg } 10003f2355cbSLuis R. Rodriguez return REG_INTERSECT; 100184fa4f43SJohannes Berg case REGDOM_SET_BY_DRIVER: 100284fa4f43SJohannes Berg if (last_request->initiator == REGDOM_SET_BY_DRIVER) 100384fa4f43SJohannes Berg return -EALREADY; 100484fa4f43SJohannes Berg return 0; 100584fa4f43SJohannes Berg case REGDOM_SET_BY_USER: 100684fa4f43SJohannes Berg if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) 10079c96477dSLuis R. Rodriguez return REG_INTERSECT; 10083f2355cbSLuis R. Rodriguez /* If the user knows better the user should set the regdom 10093f2355cbSLuis R. Rodriguez * to their country before the IE is picked up */ 10103f2355cbSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_USER && 10113f2355cbSLuis R. Rodriguez last_request->intersect) 10123f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 101384fa4f43SJohannes Berg return 0; 101484fa4f43SJohannes Berg } 101584fa4f43SJohannes Berg 101684fa4f43SJohannes Berg return -EINVAL; 101784fa4f43SJohannes Berg } 101884fa4f43SJohannes Berg 1019b2e1b302SLuis R. Rodriguez /* Caller must hold &cfg80211_drv_mutex */ 1020b2e1b302SLuis R. Rodriguez int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by, 10213f2355cbSLuis R. Rodriguez const char *alpha2, 10223f2355cbSLuis R. Rodriguez u32 country_ie_checksum, 10233f2355cbSLuis R. Rodriguez enum environment_cap env) 1024b2e1b302SLuis R. Rodriguez { 1025b2e1b302SLuis R. Rodriguez struct regulatory_request *request; 10269c96477dSLuis R. Rodriguez bool intersect = false; 1027b2e1b302SLuis R. Rodriguez int r = 0; 1028b2e1b302SLuis R. Rodriguez 1029be3d4810SJohannes Berg r = ignore_request(wiphy, set_by, alpha2); 10309c96477dSLuis R. Rodriguez 10319c96477dSLuis R. Rodriguez if (r == REG_INTERSECT) 10329c96477dSLuis R. Rodriguez intersect = true; 10339c96477dSLuis R. Rodriguez else if (r) 1034b2e1b302SLuis R. Rodriguez return r; 1035b2e1b302SLuis R. Rodriguez 1036b2e1b302SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1037b2e1b302SLuis R. Rodriguez GFP_KERNEL); 1038b2e1b302SLuis R. Rodriguez if (!request) 1039b2e1b302SLuis R. Rodriguez return -ENOMEM; 1040b2e1b302SLuis R. Rodriguez 1041be3d4810SJohannes Berg request->alpha2[0] = alpha2[0]; 1042be3d4810SJohannes Berg request->alpha2[1] = alpha2[1]; 1043b2e1b302SLuis R. Rodriguez request->initiator = set_by; 1044b2e1b302SLuis R. Rodriguez request->wiphy = wiphy; 10459c96477dSLuis R. Rodriguez request->intersect = intersect; 10463f2355cbSLuis R. Rodriguez request->country_ie_checksum = country_ie_checksum; 10473f2355cbSLuis R. Rodriguez request->country_ie_env = env; 1048b2e1b302SLuis R. Rodriguez 1049f6037d09SJohannes Berg kfree(last_request); 1050f6037d09SJohannes Berg last_request = request; 10513f2355cbSLuis R. Rodriguez /* 10523f2355cbSLuis R. Rodriguez * Note: When CONFIG_WIRELESS_OLD_REGULATORY is enabled 10533f2355cbSLuis R. Rodriguez * AND if CRDA is NOT present nothing will happen, if someone 10543f2355cbSLuis R. Rodriguez * wants to bother with 11d with OLD_REG you can add a timer. 10553f2355cbSLuis R. Rodriguez * If after x amount of time nothing happens you can call: 10563f2355cbSLuis R. Rodriguez * 10573f2355cbSLuis R. Rodriguez * return set_regdom(country_ie_regdomain); 10583f2355cbSLuis R. Rodriguez * 10593f2355cbSLuis R. Rodriguez * to intersect with the static rd 10603f2355cbSLuis R. Rodriguez */ 106102ba0b32SLuis R. Rodriguez return call_crda(alpha2); 1062b2e1b302SLuis R. Rodriguez } 1063b2e1b302SLuis R. Rodriguez 1064be3d4810SJohannes Berg void regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1065b2e1b302SLuis R. Rodriguez { 1066be3d4810SJohannes Berg BUG_ON(!alpha2); 1067b2e1b302SLuis R. Rodriguez 1068b2e1b302SLuis R. Rodriguez mutex_lock(&cfg80211_drv_mutex); 10693f2355cbSLuis R. Rodriguez __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2, 0, ENVIRON_ANY); 1070b2e1b302SLuis R. Rodriguez mutex_unlock(&cfg80211_drv_mutex); 1071b2e1b302SLuis R. Rodriguez } 1072b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1073b2e1b302SLuis R. Rodriguez 10743f2355cbSLuis R. Rodriguez static bool reg_same_country_ie_hint(struct wiphy *wiphy, 10753f2355cbSLuis R. Rodriguez u32 country_ie_checksum) 10763f2355cbSLuis R. Rodriguez { 10773f2355cbSLuis R. Rodriguez if (!last_request->wiphy) 10783f2355cbSLuis R. Rodriguez return false; 10793f2355cbSLuis R. Rodriguez if (likely(last_request->wiphy != wiphy)) 10803f2355cbSLuis R. Rodriguez return !country_ie_integrity_changes(country_ie_checksum); 10813f2355cbSLuis R. Rodriguez /* We should not have let these through at this point, they 10823f2355cbSLuis R. Rodriguez * should have been picked up earlier by the first alpha2 check 10833f2355cbSLuis R. Rodriguez * on the device */ 10843f2355cbSLuis R. Rodriguez if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) 10853f2355cbSLuis R. Rodriguez return true; 10863f2355cbSLuis R. Rodriguez return false; 10873f2355cbSLuis R. Rodriguez } 10883f2355cbSLuis R. Rodriguez 10893f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 10903f2355cbSLuis R. Rodriguez u8 *country_ie, 10913f2355cbSLuis R. Rodriguez u8 country_ie_len) 10923f2355cbSLuis R. Rodriguez { 10933f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 10943f2355cbSLuis R. Rodriguez char alpha2[2]; 10953f2355cbSLuis R. Rodriguez u32 checksum = 0; 10963f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 10973f2355cbSLuis R. Rodriguez 10980f70f398SJohannes Berg if (!last_request) 10990f70f398SJohannes Berg return; 11000f70f398SJohannes Berg 11013f2355cbSLuis R. Rodriguez mutex_lock(&cfg80211_drv_mutex); 11023f2355cbSLuis R. Rodriguez 11033f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 11043f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 11053f2355cbSLuis R. Rodriguez goto out; 11063f2355cbSLuis R. Rodriguez 11073f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 11083f2355cbSLuis R. Rodriguez goto out; 11093f2355cbSLuis R. Rodriguez 11103f2355cbSLuis R. Rodriguez /* Pending country IE processing, this can happen after we 11113f2355cbSLuis R. Rodriguez * call CRDA and wait for a response if a beacon was received before 11123f2355cbSLuis R. Rodriguez * we were able to process the last regulatory_hint_11d() call */ 11133f2355cbSLuis R. Rodriguez if (country_ie_regdomain) 11143f2355cbSLuis R. Rodriguez goto out; 11153f2355cbSLuis R. Rodriguez 11163f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 11173f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 11183f2355cbSLuis R. Rodriguez 11193f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 11203f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 11213f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 11223f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 11233f2355cbSLuis R. Rodriguez 11243f2355cbSLuis R. Rodriguez /* We will run this for *every* beacon processed for the BSSID, so 11253f2355cbSLuis R. Rodriguez * we optimize an early check to exit out early if we don't have to 11263f2355cbSLuis R. Rodriguez * do anything */ 11273f2355cbSLuis R. Rodriguez if (likely(last_request->wiphy)) { 11283f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv_last_ie; 11293f2355cbSLuis R. Rodriguez 11303f2355cbSLuis R. Rodriguez drv_last_ie = wiphy_to_dev(last_request->wiphy); 11313f2355cbSLuis R. Rodriguez 11323f2355cbSLuis R. Rodriguez /* Lets keep this simple -- we trust the first AP 11333f2355cbSLuis R. Rodriguez * after we intersect with CRDA */ 11343f2355cbSLuis R. Rodriguez if (likely(last_request->wiphy == wiphy)) { 11353f2355cbSLuis R. Rodriguez /* Ignore IEs coming in on this wiphy with 11363f2355cbSLuis R. Rodriguez * the same alpha2 and environment cap */ 11373f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 11383f2355cbSLuis R. Rodriguez alpha2) && 11393f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 11403f2355cbSLuis R. Rodriguez goto out; 11413f2355cbSLuis R. Rodriguez } 11423f2355cbSLuis R. Rodriguez /* the wiphy moved on to another BSSID or the AP 11433f2355cbSLuis R. Rodriguez * was reconfigured. XXX: We need to deal with the 11443f2355cbSLuis R. Rodriguez * case where the user suspends and goes to goes 11453f2355cbSLuis R. Rodriguez * to another country, and then gets IEs from an 11463f2355cbSLuis R. Rodriguez * AP with different settings */ 11473f2355cbSLuis R. Rodriguez goto out; 11483f2355cbSLuis R. Rodriguez } else { 11493f2355cbSLuis R. Rodriguez /* Ignore IEs coming in on two separate wiphys with 11503f2355cbSLuis R. Rodriguez * the same alpha2 and environment cap */ 11513f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 11523f2355cbSLuis R. Rodriguez alpha2) && 11533f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 11543f2355cbSLuis R. Rodriguez goto out; 11553f2355cbSLuis R. Rodriguez } 11563f2355cbSLuis R. Rodriguez /* We could potentially intersect though */ 11573f2355cbSLuis R. Rodriguez goto out; 11583f2355cbSLuis R. Rodriguez } 11593f2355cbSLuis R. Rodriguez } 11603f2355cbSLuis R. Rodriguez 11613f2355cbSLuis R. Rodriguez rd = country_ie_2_rd(country_ie, country_ie_len, &checksum); 11623f2355cbSLuis R. Rodriguez if (!rd) 11633f2355cbSLuis R. Rodriguez goto out; 11643f2355cbSLuis R. Rodriguez 11653f2355cbSLuis R. Rodriguez /* This will not happen right now but we leave it here for the 11663f2355cbSLuis R. Rodriguez * the future when we want to add suspend/resume support and having 11673f2355cbSLuis R. Rodriguez * the user move to another country after doing so, or having the user 11683f2355cbSLuis R. Rodriguez * move to another AP. Right now we just trust the first AP. This is why 11693f2355cbSLuis R. Rodriguez * this is marked as likley(). If we hit this before we add this support 11703f2355cbSLuis R. Rodriguez * we want to be informed of it as it would indicate a mistake in the 11713f2355cbSLuis R. Rodriguez * current design */ 11723f2355cbSLuis R. Rodriguez if (likely(WARN_ON(reg_same_country_ie_hint(wiphy, checksum)))) 11733f2355cbSLuis R. Rodriguez goto out; 11743f2355cbSLuis R. Rodriguez 11753f2355cbSLuis R. Rodriguez /* We keep this around for when CRDA comes back with a response so 11763f2355cbSLuis R. Rodriguez * we can intersect with that */ 11773f2355cbSLuis R. Rodriguez country_ie_regdomain = rd; 11783f2355cbSLuis R. Rodriguez 11793f2355cbSLuis R. Rodriguez __regulatory_hint(wiphy, REGDOM_SET_BY_COUNTRY_IE, 11803f2355cbSLuis R. Rodriguez country_ie_regdomain->alpha2, checksum, env); 11813f2355cbSLuis R. Rodriguez 11823f2355cbSLuis R. Rodriguez out: 11833f2355cbSLuis R. Rodriguez mutex_unlock(&cfg80211_drv_mutex); 11843f2355cbSLuis R. Rodriguez } 11853f2355cbSLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint_11d); 1186b2e1b302SLuis R. Rodriguez 1187a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1188b2e1b302SLuis R. Rodriguez { 1189b2e1b302SLuis R. Rodriguez unsigned int i; 1190a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1191a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1192a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1193b2e1b302SLuis R. Rodriguez 1194b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), " 1195b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 1196b2e1b302SLuis R. Rodriguez 1197b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1198b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1199b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1200b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1201b2e1b302SLuis R. Rodriguez 1202b2e1b302SLuis R. Rodriguez /* There may not be documentation for max antenna gain 1203b2e1b302SLuis R. Rodriguez * in certain regions */ 1204b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1205b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1206b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 1207b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1208b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1209b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1210b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1211b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1212b2e1b302SLuis R. Rodriguez else 1213b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1214b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 1215b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1216b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1217b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1218b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1219b2e1b302SLuis R. Rodriguez } 1220b2e1b302SLuis R. Rodriguez } 1221b2e1b302SLuis R. Rodriguez 1222a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 1223b2e1b302SLuis R. Rodriguez { 1224b2e1b302SLuis R. Rodriguez 12253f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 12263f2355cbSLuis R. Rodriguez struct wiphy *wiphy = NULL; 12273f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv; 12283f2355cbSLuis R. Rodriguez 12293f2355cbSLuis R. Rodriguez if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { 12303f2355cbSLuis R. Rodriguez if (last_request->wiphy) { 12313f2355cbSLuis R. Rodriguez wiphy = last_request->wiphy; 12323f2355cbSLuis R. Rodriguez drv = wiphy_to_dev(wiphy); 12333f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 12343f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 12353f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0], 12363f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1]); 12373f2355cbSLuis R. Rodriguez } else 12383f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 12393f2355cbSLuis R. Rodriguez "domain intersected: \n"); 12403f2355cbSLuis R. Rodriguez } else 12413f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 12423f2355cbSLuis R. Rodriguez "intersected: \n"); 12433f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 1244b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 1245b2e1b302SLuis R. Rodriguez "domain updated:\n"); 1246b2e1b302SLuis R. Rodriguez else { 1247b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 1248b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1249b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 1250b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 1251b2e1b302SLuis R. Rodriguez else 1252b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1253b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 1254b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1255b2e1b302SLuis R. Rodriguez } 1256b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1257b2e1b302SLuis R. Rodriguez } 1258b2e1b302SLuis R. Rodriguez 12592df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 1260b2e1b302SLuis R. Rodriguez { 1261b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 1262b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1263b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1264b2e1b302SLuis R. Rodriguez } 1265b2e1b302SLuis R. Rodriguez 12663f2355cbSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 12673f2355cbSLuis R. Rodriguez static void reg_country_ie_process_debug( 12683f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 12693f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 12703f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 12713f2355cbSLuis R. Rodriguez { 12723f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Received country IE:\n"); 12733f2355cbSLuis R. Rodriguez print_regdomain_info(country_ie_regdomain); 12743f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); 12753f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 12763f2355cbSLuis R. Rodriguez if (intersected_rd) { 12773f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: We intersect both of these " 12783f2355cbSLuis R. Rodriguez "and get:\n"); 12793f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 12803f2355cbSLuis R. Rodriguez return; 12813f2355cbSLuis R. Rodriguez } 12823f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); 12833f2355cbSLuis R. Rodriguez } 12843f2355cbSLuis R. Rodriguez #else 12853f2355cbSLuis R. Rodriguez static inline void reg_country_ie_process_debug( 12863f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 12873f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 12883f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 12893f2355cbSLuis R. Rodriguez { 12903f2355cbSLuis R. Rodriguez } 12913f2355cbSLuis R. Rodriguez #endif 12923f2355cbSLuis R. Rodriguez 1293d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 1294a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 1295b2e1b302SLuis R. Rodriguez { 12969c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 12973f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv = NULL; 12983f2355cbSLuis R. Rodriguez struct wiphy *wiphy = NULL; 1299b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 1300b2e1b302SLuis R. Rodriguez 1301b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 1302f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1303b2e1b302SLuis R. Rodriguez return -EINVAL; 1304b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 1305b2e1b302SLuis R. Rodriguez return 0; 1306b2e1b302SLuis R. Rodriguez } 1307b2e1b302SLuis R. Rodriguez 1308b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 1309b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 1310b2e1b302SLuis R. Rodriguez return -EINVAL; 1311b2e1b302SLuis R. Rodriguez 1312f6037d09SJohannes Berg if (!last_request) 1313b2e1b302SLuis R. Rodriguez return -EINVAL; 1314b2e1b302SLuis R. Rodriguez 13153f2355cbSLuis R. Rodriguez /* Lets only bother proceeding on the same alpha2 if the current 13163f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 13173f2355cbSLuis R. Rodriguez * and the pending request came in from a country IE */ 13183f2355cbSLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) { 13193f2355cbSLuis R. Rodriguez /* If someone else asked us to change the rd lets only bother 13203f2355cbSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called */ 1321b2e1b302SLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 1322b2e1b302SLuis R. Rodriguez !regdom_changed(rd->alpha2)) 1323b2e1b302SLuis R. Rodriguez return -EINVAL; 13243f2355cbSLuis R. Rodriguez } 13253f2355cbSLuis R. Rodriguez 13263f2355cbSLuis R. Rodriguez wiphy = last_request->wiphy; 1327b2e1b302SLuis R. Rodriguez 1328b2e1b302SLuis R. Rodriguez /* Now lets set the regulatory domain, update all driver channels 1329b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 1330b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 1331b2e1b302SLuis R. Rodriguez * internal EEPROM data */ 1332b2e1b302SLuis R. Rodriguez 1333f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1334b2e1b302SLuis R. Rodriguez return -EINVAL; 1335b2e1b302SLuis R. Rodriguez 1336b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 1337b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 1338b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 1339b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 1340b2e1b302SLuis R. Rodriguez return -EINVAL; 1341b2e1b302SLuis R. Rodriguez } 1342b2e1b302SLuis R. Rodriguez 1343b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 1344b8295acdSLuis R. Rodriguez reset_regdomains(); 1345b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 1346b8295acdSLuis R. Rodriguez return 0; 1347b8295acdSLuis R. Rodriguez } 1348b8295acdSLuis R. Rodriguez 1349b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 1350b8295acdSLuis R. Rodriguez 1351b8295acdSLuis R. Rodriguez if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) { 1352b8295acdSLuis R. Rodriguez 13539c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 13549c96477dSLuis R. Rodriguez if (!intersected_rd) 13559c96477dSLuis R. Rodriguez return -EINVAL; 1356b8295acdSLuis R. Rodriguez 1357b8295acdSLuis R. Rodriguez /* We can trash what CRDA provided now */ 13589c96477dSLuis R. Rodriguez kfree(rd); 1359b8295acdSLuis R. Rodriguez rd = NULL; 1360b8295acdSLuis R. Rodriguez 1361b8295acdSLuis R. Rodriguez reset_regdomains(); 1362b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 1363b8295acdSLuis R. Rodriguez 1364b8295acdSLuis R. Rodriguez return 0; 13659c96477dSLuis R. Rodriguez } 13669c96477dSLuis R. Rodriguez 13673f2355cbSLuis R. Rodriguez /* 13683f2355cbSLuis R. Rodriguez * Country IE requests are handled a bit differently, we intersect 13693f2355cbSLuis R. Rodriguez * the country IE rd with what CRDA believes that country should have 13703f2355cbSLuis R. Rodriguez */ 13713f2355cbSLuis R. Rodriguez 13723f2355cbSLuis R. Rodriguez BUG_ON(!country_ie_regdomain); 13733f2355cbSLuis R. Rodriguez 13743f2355cbSLuis R. Rodriguez if (rd != country_ie_regdomain) { 13753f2355cbSLuis R. Rodriguez /* Intersect what CRDA returned and our what we 13763f2355cbSLuis R. Rodriguez * had built from the Country IE received */ 13773f2355cbSLuis R. Rodriguez 13783f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, country_ie_regdomain); 13793f2355cbSLuis R. Rodriguez 13803f2355cbSLuis R. Rodriguez reg_country_ie_process_debug(rd, country_ie_regdomain, 13813f2355cbSLuis R. Rodriguez intersected_rd); 13823f2355cbSLuis R. Rodriguez 13833f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 13843f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 13853f2355cbSLuis R. Rodriguez } else { 13863f2355cbSLuis R. Rodriguez /* This would happen when CRDA was not present and 13873f2355cbSLuis R. Rodriguez * OLD_REGULATORY was enabled. We intersect our Country 13883f2355cbSLuis R. Rodriguez * IE rd and what was set on cfg80211 originally */ 13893f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 13903f2355cbSLuis R. Rodriguez } 13913f2355cbSLuis R. Rodriguez 13923f2355cbSLuis R. Rodriguez if (!intersected_rd) 13933f2355cbSLuis R. Rodriguez return -EINVAL; 13943f2355cbSLuis R. Rodriguez 13953f2355cbSLuis R. Rodriguez drv = wiphy_to_dev(wiphy); 13963f2355cbSLuis R. Rodriguez 13973f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0] = rd->alpha2[0]; 13983f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1] = rd->alpha2[1]; 13993f2355cbSLuis R. Rodriguez drv->env = last_request->country_ie_env; 14003f2355cbSLuis R. Rodriguez 14013f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 14023f2355cbSLuis R. Rodriguez 14033f2355cbSLuis R. Rodriguez kfree(rd); 14043f2355cbSLuis R. Rodriguez rd = NULL; 14053f2355cbSLuis R. Rodriguez 1406b8295acdSLuis R. Rodriguez reset_regdomains(); 14073f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 1408b2e1b302SLuis R. Rodriguez 1409b2e1b302SLuis R. Rodriguez return 0; 1410b2e1b302SLuis R. Rodriguez } 1411b2e1b302SLuis R. Rodriguez 1412b2e1b302SLuis R. Rodriguez 1413b2e1b302SLuis R. Rodriguez /* Use this call to set the current regulatory domain. Conflicts with 1414b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 1415d2372b31SJohannes Berg * kmalloc'd the rd structure. Caller must hold cfg80211_drv_mutex */ 1416a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 1417b2e1b302SLuis R. Rodriguez { 1418b2e1b302SLuis R. Rodriguez int r; 1419b2e1b302SLuis R. Rodriguez 1420b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 1421b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 1422d2372b31SJohannes Berg if (r) { 1423d2372b31SJohannes Berg kfree(rd); 1424b2e1b302SLuis R. Rodriguez return r; 1425d2372b31SJohannes Berg } 1426b2e1b302SLuis R. Rodriguez 1427b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 1428a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 1429b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 1430b2e1b302SLuis R. Rodriguez 1431b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 1432f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 1433b2e1b302SLuis R. Rodriguez 1434a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 1435b2e1b302SLuis R. Rodriguez 1436b2e1b302SLuis R. Rodriguez return r; 1437b2e1b302SLuis R. Rodriguez } 1438b2e1b302SLuis R. Rodriguez 14393f2355cbSLuis R. Rodriguez /* Caller must hold cfg80211_drv_mutex */ 14403f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 14413f2355cbSLuis R. Rodriguez { 14424a4f4d80SJohannes Berg if (!last_request || !last_request->wiphy) 14433f2355cbSLuis R. Rodriguez return; 14443f2355cbSLuis R. Rodriguez if (last_request->wiphy != wiphy) 14453f2355cbSLuis R. Rodriguez return; 14463f2355cbSLuis R. Rodriguez last_request->wiphy = NULL; 14473f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 14483f2355cbSLuis R. Rodriguez } 14493f2355cbSLuis R. Rodriguez 1450b2e1b302SLuis R. Rodriguez int regulatory_init(void) 1451b2e1b302SLuis R. Rodriguez { 1452734366deSJohannes Berg int err; 1453734366deSJohannes Berg 1454b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 1455b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 1456b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 1457734366deSJohannes Berg 1458734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 1459a3d2eaf0SJohannes Berg cfg80211_regdomain = static_regdom(ieee80211_regdom); 1460734366deSJohannes Berg 1461942b25cfSJohannes Berg printk(KERN_INFO "cfg80211: Using static regulatory domain info\n"); 1462734366deSJohannes Berg print_regdomain_info(cfg80211_regdomain); 1463734366deSJohannes Berg /* The old code still requests for a new regdomain and if 1464734366deSJohannes Berg * you have CRDA you get it updated, otherwise you get 1465734366deSJohannes Berg * stuck with the static values. We ignore "EU" code as 1466734366deSJohannes Berg * that is not a valid ISO / IEC 3166 alpha2 */ 1467ac9440a4SJohannes Berg if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U') 1468734366deSJohannes Berg err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, 14693f2355cbSLuis R. Rodriguez ieee80211_regdom, 0, ENVIRON_ANY); 1470734366deSJohannes Berg #else 1471a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 1472734366deSJohannes Berg 14733f2355cbSLuis R. Rodriguez err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", 0, ENVIRON_ANY); 1474734366deSJohannes Berg if (err) 1475734366deSJohannes Berg printk(KERN_ERR "cfg80211: calling CRDA failed - " 1476734366deSJohannes Berg "unable to update world regulatory domain, " 1477734366deSJohannes Berg "using static definition\n"); 1478734366deSJohannes Berg #endif 1479734366deSJohannes Berg 1480b2e1b302SLuis R. Rodriguez return 0; 1481b2e1b302SLuis R. Rodriguez } 1482b2e1b302SLuis R. Rodriguez 1483b2e1b302SLuis R. Rodriguez void regulatory_exit(void) 1484b2e1b302SLuis R. Rodriguez { 1485b2e1b302SLuis R. Rodriguez mutex_lock(&cfg80211_drv_mutex); 1486734366deSJohannes Berg 1487b2e1b302SLuis R. Rodriguez reset_regdomains(); 1488734366deSJohannes Berg 14893f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 14903f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 14913f2355cbSLuis R. Rodriguez 1492f6037d09SJohannes Berg kfree(last_request); 1493f6037d09SJohannes Berg 1494b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 1495734366deSJohannes Berg 1496b2e1b302SLuis R. Rodriguez mutex_unlock(&cfg80211_drv_mutex); 14978318d78aSJohannes Berg } 1498