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" 4473d54c9eSLuis R. Rodriguez #include "nl80211.h" 458318d78aSJohannes Berg 465166ccd2SLuis R. Rodriguez /* Receipt of information from last regulatory request */ 47f6037d09SJohannes Berg static struct regulatory_request *last_request; 48734366deSJohannes Berg 49b2e1b302SLuis R. Rodriguez /* To trigger userspace events */ 50b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 518318d78aSJohannes Berg 52b2e1b302SLuis R. Rodriguez /* Keep the ordering from large to small */ 53b2e1b302SLuis R. Rodriguez static u32 supported_bandwidths[] = { 54b2e1b302SLuis R. Rodriguez MHZ_TO_KHZ(40), 55b2e1b302SLuis R. Rodriguez MHZ_TO_KHZ(20), 568318d78aSJohannes Berg }; 578318d78aSJohannes Berg 58fb1fc7adSLuis R. Rodriguez /* 59fb1fc7adSLuis R. Rodriguez * Central wireless core regulatory domains, we only need two, 60734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 61fb1fc7adSLuis R. Rodriguez * information to give us an alpha2 62fb1fc7adSLuis R. Rodriguez */ 63f130347cSLuis R. Rodriguez const struct ieee80211_regdomain *cfg80211_regdomain; 64734366deSJohannes Berg 65fb1fc7adSLuis R. Rodriguez /* 66fb1fc7adSLuis R. Rodriguez * We use this as a place for the rd structure built from the 673f2355cbSLuis R. Rodriguez * last parsed country IE to rest until CRDA gets back to us with 68fb1fc7adSLuis R. Rodriguez * what it thinks should apply for the same country 69fb1fc7adSLuis R. Rodriguez */ 703f2355cbSLuis R. Rodriguez static const struct ieee80211_regdomain *country_ie_regdomain; 713f2355cbSLuis R. Rodriguez 72e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 73fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 74fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 75fe33eb39SLuis R. Rodriguez 76e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 77e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 78e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 79e38f8a7aSLuis R. Rodriguez 80e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 81e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 82e38f8a7aSLuis R. Rodriguez 83e38f8a7aSLuis R. Rodriguez struct reg_beacon { 84e38f8a7aSLuis R. Rodriguez struct list_head list; 85e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 86e38f8a7aSLuis R. Rodriguez }; 87e38f8a7aSLuis R. Rodriguez 88734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 89734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 90611b6a82SLuis R. Rodriguez .n_reg_rules = 5, 91734366deSJohannes Berg .alpha2 = "00", 92734366deSJohannes Berg .reg_rules = { 9368798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 9468798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 95611b6a82SLuis R. Rodriguez /* IEEE 802.11b/g, channels 12..13. No HT40 96611b6a82SLuis R. Rodriguez * channel fits here. */ 97611b6a82SLuis R. Rodriguez REG_RULE(2467-10, 2472+10, 20, 6, 20, 98611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 99611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 100611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 101611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 102611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 103611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 104611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS | 105611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 1063fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 107ec329aceSLuis R. Rodriguez REG_RULE(5180-10, 5240+10, 40, 6, 20, 1083fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1093fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 1103fc71f77SLuis R. Rodriguez 1113fc71f77SLuis R. Rodriguez /* NB: 5260 MHz - 5700 MHz requies DFS */ 1123fc71f77SLuis R. Rodriguez 1133fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 114ec329aceSLuis R. Rodriguez REG_RULE(5745-10, 5825+10, 40, 6, 20, 1153fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1163fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 117734366deSJohannes Berg } 118734366deSJohannes Berg }; 119734366deSJohannes Berg 120a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 121a3d2eaf0SJohannes Berg &world_regdom; 122734366deSJohannes Berg 123734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 124734366deSJohannes Berg static char *ieee80211_regdom = "US"; 125734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 126734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 127734366deSJohannes Berg 128fb1fc7adSLuis R. Rodriguez /* 129fb1fc7adSLuis R. Rodriguez * We assume 40 MHz bandwidth for the old regulatory work. 130734366deSJohannes Berg * We make emphasis we are using the exact same frequencies 131fb1fc7adSLuis R. Rodriguez * as before 132fb1fc7adSLuis R. Rodriguez */ 133734366deSJohannes Berg 134734366deSJohannes Berg static const struct ieee80211_regdomain us_regdom = { 135734366deSJohannes Berg .n_reg_rules = 6, 136734366deSJohannes Berg .alpha2 = "US", 137734366deSJohannes Berg .reg_rules = { 138734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..11 */ 139734366deSJohannes Berg REG_RULE(2412-10, 2462+10, 40, 6, 27, 0), 140734366deSJohannes Berg /* IEEE 802.11a, channel 36 */ 141734366deSJohannes Berg REG_RULE(5180-10, 5180+10, 40, 6, 23, 0), 142734366deSJohannes Berg /* IEEE 802.11a, channel 40 */ 143734366deSJohannes Berg REG_RULE(5200-10, 5200+10, 40, 6, 23, 0), 144734366deSJohannes Berg /* IEEE 802.11a, channel 44 */ 145734366deSJohannes Berg REG_RULE(5220-10, 5220+10, 40, 6, 23, 0), 146734366deSJohannes Berg /* IEEE 802.11a, channels 48..64 */ 147734366deSJohannes Berg REG_RULE(5240-10, 5320+10, 40, 6, 23, 0), 148734366deSJohannes Berg /* IEEE 802.11a, channels 149..165, outdoor */ 149734366deSJohannes Berg REG_RULE(5745-10, 5825+10, 40, 6, 30, 0), 150734366deSJohannes Berg } 151734366deSJohannes Berg }; 152734366deSJohannes Berg 153734366deSJohannes Berg static const struct ieee80211_regdomain jp_regdom = { 154734366deSJohannes Berg .n_reg_rules = 3, 155734366deSJohannes Berg .alpha2 = "JP", 156734366deSJohannes Berg .reg_rules = { 157734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..14 */ 158734366deSJohannes Berg REG_RULE(2412-10, 2484+10, 40, 6, 20, 0), 159734366deSJohannes Berg /* IEEE 802.11a, channels 34..48 */ 160734366deSJohannes Berg REG_RULE(5170-10, 5240+10, 40, 6, 20, 161734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 162734366deSJohannes Berg /* IEEE 802.11a, channels 52..64 */ 163734366deSJohannes Berg REG_RULE(5260-10, 5320+10, 40, 6, 20, 164734366deSJohannes Berg NL80211_RRF_NO_IBSS | 165734366deSJohannes Berg NL80211_RRF_DFS), 166734366deSJohannes Berg } 167734366deSJohannes Berg }; 168734366deSJohannes Berg 169734366deSJohannes Berg static const struct ieee80211_regdomain eu_regdom = { 170734366deSJohannes Berg .n_reg_rules = 6, 171fb1fc7adSLuis R. Rodriguez /* 172fb1fc7adSLuis R. Rodriguez * This alpha2 is bogus, we leave it here just for stupid 173fb1fc7adSLuis R. Rodriguez * backward compatibility 174fb1fc7adSLuis R. Rodriguez */ 175734366deSJohannes Berg .alpha2 = "EU", 176734366deSJohannes Berg .reg_rules = { 177734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..13 */ 178734366deSJohannes Berg REG_RULE(2412-10, 2472+10, 40, 6, 20, 0), 179734366deSJohannes Berg /* IEEE 802.11a, channel 36 */ 180734366deSJohannes Berg REG_RULE(5180-10, 5180+10, 40, 6, 23, 181734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 182734366deSJohannes Berg /* IEEE 802.11a, channel 40 */ 183734366deSJohannes Berg REG_RULE(5200-10, 5200+10, 40, 6, 23, 184734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 185734366deSJohannes Berg /* IEEE 802.11a, channel 44 */ 186734366deSJohannes Berg REG_RULE(5220-10, 5220+10, 40, 6, 23, 187734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 188734366deSJohannes Berg /* IEEE 802.11a, channels 48..64 */ 189734366deSJohannes Berg REG_RULE(5240-10, 5320+10, 40, 6, 20, 190734366deSJohannes Berg NL80211_RRF_NO_IBSS | 191734366deSJohannes Berg NL80211_RRF_DFS), 192734366deSJohannes Berg /* IEEE 802.11a, channels 100..140 */ 193734366deSJohannes Berg REG_RULE(5500-10, 5700+10, 40, 6, 30, 194734366deSJohannes Berg NL80211_RRF_NO_IBSS | 195734366deSJohannes Berg NL80211_RRF_DFS), 196734366deSJohannes Berg } 197734366deSJohannes Berg }; 198734366deSJohannes Berg 199734366deSJohannes Berg static const struct ieee80211_regdomain *static_regdom(char *alpha2) 200734366deSJohannes Berg { 201734366deSJohannes Berg if (alpha2[0] == 'U' && alpha2[1] == 'S') 202734366deSJohannes Berg return &us_regdom; 203734366deSJohannes Berg if (alpha2[0] == 'J' && alpha2[1] == 'P') 204734366deSJohannes Berg return &jp_regdom; 205734366deSJohannes Berg if (alpha2[0] == 'E' && alpha2[1] == 'U') 206734366deSJohannes Berg return &eu_regdom; 207734366deSJohannes Berg /* Default, as per the old rules */ 208734366deSJohannes Berg return &us_regdom; 209734366deSJohannes Berg } 210734366deSJohannes Berg 211a3d2eaf0SJohannes Berg static bool is_old_static_regdom(const struct ieee80211_regdomain *rd) 212734366deSJohannes Berg { 213734366deSJohannes Berg if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom) 214734366deSJohannes Berg return true; 215734366deSJohannes Berg return false; 216734366deSJohannes Berg } 217734366deSJohannes Berg #else 218942b25cfSJohannes Berg static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd) 219942b25cfSJohannes Berg { 220942b25cfSJohannes Berg return false; 221942b25cfSJohannes Berg } 222942b25cfSJohannes Berg #endif 223942b25cfSJohannes Berg 224734366deSJohannes Berg static void reset_regdomains(void) 225734366deSJohannes Berg { 226942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 227942b25cfSJohannes Berg if (cfg80211_regdomain == cfg80211_world_regdom) 228942b25cfSJohannes Berg cfg80211_regdomain = NULL; 229942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 230942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 231942b25cfSJohannes Berg if (cfg80211_regdomain == &world_regdom) 232942b25cfSJohannes Berg cfg80211_regdomain = NULL; 233942b25cfSJohannes Berg if (is_old_static_regdom(cfg80211_regdomain)) 234942b25cfSJohannes Berg cfg80211_regdomain = NULL; 235942b25cfSJohannes Berg 236734366deSJohannes Berg kfree(cfg80211_regdomain); 237734366deSJohannes Berg kfree(cfg80211_world_regdom); 238734366deSJohannes Berg 239a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 240734366deSJohannes Berg cfg80211_regdomain = NULL; 241734366deSJohannes Berg } 242734366deSJohannes Berg 243fb1fc7adSLuis R. Rodriguez /* 244fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 245fb1fc7adSLuis R. Rodriguez * core upon initialization 246fb1fc7adSLuis R. Rodriguez */ 247a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 248734366deSJohannes Berg { 249f6037d09SJohannes Berg BUG_ON(!last_request); 250734366deSJohannes Berg 251734366deSJohannes Berg reset_regdomains(); 252734366deSJohannes Berg 253734366deSJohannes Berg cfg80211_world_regdom = rd; 254734366deSJohannes Berg cfg80211_regdomain = rd; 255734366deSJohannes Berg } 256734366deSJohannes Berg 257a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 258b2e1b302SLuis R. Rodriguez { 259b2e1b302SLuis R. Rodriguez if (!alpha2) 260b2e1b302SLuis R. Rodriguez return false; 261b2e1b302SLuis R. Rodriguez if (alpha2[0] == '0' && alpha2[1] == '0') 262b2e1b302SLuis R. Rodriguez return true; 263b2e1b302SLuis R. Rodriguez return false; 264b2e1b302SLuis R. Rodriguez } 265b2e1b302SLuis R. Rodriguez 266a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 267b2e1b302SLuis R. Rodriguez { 268b2e1b302SLuis R. Rodriguez if (!alpha2) 269b2e1b302SLuis R. Rodriguez return false; 270b2e1b302SLuis R. Rodriguez if (alpha2[0] != 0 && alpha2[1] != 0) 271b2e1b302SLuis R. Rodriguez return true; 272b2e1b302SLuis R. Rodriguez return false; 273b2e1b302SLuis R. Rodriguez } 274b2e1b302SLuis R. Rodriguez 275b2e1b302SLuis R. Rodriguez static bool is_alpha_upper(char letter) 276b2e1b302SLuis R. Rodriguez { 277b2e1b302SLuis R. Rodriguez /* ASCII A - Z */ 278b2e1b302SLuis R. Rodriguez if (letter >= 65 && letter <= 90) 279b2e1b302SLuis R. Rodriguez return true; 280b2e1b302SLuis R. Rodriguez return false; 281b2e1b302SLuis R. Rodriguez } 282b2e1b302SLuis R. Rodriguez 283a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 284b2e1b302SLuis R. Rodriguez { 285b2e1b302SLuis R. Rodriguez if (!alpha2) 286b2e1b302SLuis R. Rodriguez return false; 287fb1fc7adSLuis R. Rodriguez /* 288fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 289fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 290fb1fc7adSLuis R. Rodriguez */ 291b2e1b302SLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '9') 292b2e1b302SLuis R. Rodriguez return true; 293b2e1b302SLuis R. Rodriguez return false; 294b2e1b302SLuis R. Rodriguez } 295b2e1b302SLuis R. Rodriguez 2963f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2973f2355cbSLuis R. Rodriguez { 2983f2355cbSLuis R. Rodriguez if (!alpha2) 2993f2355cbSLuis R. Rodriguez return false; 300fb1fc7adSLuis R. Rodriguez /* 301fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 3023f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 303fb1fc7adSLuis R. Rodriguez * structures 304fb1fc7adSLuis R. Rodriguez */ 3053f2355cbSLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '8') 3063f2355cbSLuis R. Rodriguez return true; 3073f2355cbSLuis R. Rodriguez return false; 3083f2355cbSLuis R. Rodriguez } 3093f2355cbSLuis R. Rodriguez 310a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 311b2e1b302SLuis R. Rodriguez { 312b2e1b302SLuis R. Rodriguez if (!alpha2) 313b2e1b302SLuis R. Rodriguez return false; 314b2e1b302SLuis R. Rodriguez if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) 315b2e1b302SLuis R. Rodriguez return true; 316b2e1b302SLuis R. Rodriguez return false; 317b2e1b302SLuis R. Rodriguez } 318b2e1b302SLuis R. Rodriguez 319a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 320b2e1b302SLuis R. Rodriguez { 321b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 322b2e1b302SLuis R. Rodriguez return false; 323b2e1b302SLuis R. Rodriguez if (alpha2_x[0] == alpha2_y[0] && 324b2e1b302SLuis R. Rodriguez alpha2_x[1] == alpha2_y[1]) 325b2e1b302SLuis R. Rodriguez return true; 326b2e1b302SLuis R. Rodriguez return false; 327b2e1b302SLuis R. Rodriguez } 328b2e1b302SLuis R. Rodriguez 32969b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 330b2e1b302SLuis R. Rodriguez { 331761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 332761cf7ecSLuis R. Rodriguez 333b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 334b2e1b302SLuis R. Rodriguez return true; 335b2e1b302SLuis R. Rodriguez if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 336b2e1b302SLuis R. Rodriguez return false; 337b2e1b302SLuis R. Rodriguez return true; 338b2e1b302SLuis R. Rodriguez } 339b2e1b302SLuis R. Rodriguez 3403f2355cbSLuis R. Rodriguez /** 3413f2355cbSLuis R. Rodriguez * country_ie_integrity_changes - tells us if the country IE has changed 3423f2355cbSLuis R. Rodriguez * @checksum: checksum of country IE of fields we are interested in 3433f2355cbSLuis R. Rodriguez * 3443f2355cbSLuis R. Rodriguez * If the country IE has not changed you can ignore it safely. This is 3453f2355cbSLuis R. Rodriguez * useful to determine if two devices are seeing two different country IEs 3463f2355cbSLuis R. Rodriguez * even on the same alpha2. Note that this will return false if no IE has 3473f2355cbSLuis R. Rodriguez * been set on the wireless core yet. 3483f2355cbSLuis R. Rodriguez */ 3493f2355cbSLuis R. Rodriguez static bool country_ie_integrity_changes(u32 checksum) 3503f2355cbSLuis R. Rodriguez { 3513f2355cbSLuis R. Rodriguez /* If no IE has been set then the checksum doesn't change */ 3523f2355cbSLuis R. Rodriguez if (unlikely(!last_request->country_ie_checksum)) 3533f2355cbSLuis R. Rodriguez return false; 3543f2355cbSLuis R. Rodriguez if (unlikely(last_request->country_ie_checksum != checksum)) 3553f2355cbSLuis R. Rodriguez return true; 3563f2355cbSLuis R. Rodriguez return false; 3573f2355cbSLuis R. Rodriguez } 3583f2355cbSLuis R. Rodriguez 359fb1fc7adSLuis R. Rodriguez /* 360fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 361fb1fc7adSLuis R. Rodriguez * basis in userspace. 362fb1fc7adSLuis R. Rodriguez */ 363b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 364b2e1b302SLuis R. Rodriguez { 365b2e1b302SLuis R. Rodriguez char country_env[9 + 2] = "COUNTRY="; 366b2e1b302SLuis R. Rodriguez char *envp[] = { 367b2e1b302SLuis R. Rodriguez country_env, 368b2e1b302SLuis R. Rodriguez NULL 3698318d78aSJohannes Berg }; 3708318d78aSJohannes Berg 371b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 372b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", 373b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 374b2e1b302SLuis R. Rodriguez else 375b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA to update world " 376b2e1b302SLuis R. Rodriguez "regulatory domain\n"); 3778318d78aSJohannes Berg 378b2e1b302SLuis R. Rodriguez country_env[8] = alpha2[0]; 379b2e1b302SLuis R. Rodriguez country_env[9] = alpha2[1]; 3808318d78aSJohannes Berg 381b2e1b302SLuis R. Rodriguez return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); 382b2e1b302SLuis R. Rodriguez } 383b2e1b302SLuis R. Rodriguez 384b2e1b302SLuis R. Rodriguez /* Used by nl80211 before kmalloc'ing our regulatory domain */ 385a3d2eaf0SJohannes Berg bool reg_is_valid_request(const char *alpha2) 386b2e1b302SLuis R. Rodriguez { 387f6037d09SJohannes Berg if (!last_request) 388f6037d09SJohannes Berg return false; 389f6037d09SJohannes Berg 390f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 391b2e1b302SLuis R. Rodriguez } 392b2e1b302SLuis R. Rodriguez 393b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 394a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 395b2e1b302SLuis R. Rodriguez { 396a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 397b2e1b302SLuis R. Rodriguez u32 freq_diff; 398b2e1b302SLuis R. Rodriguez 39991e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 400b2e1b302SLuis R. Rodriguez return false; 401b2e1b302SLuis R. Rodriguez 402b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 403b2e1b302SLuis R. Rodriguez return false; 404b2e1b302SLuis R. Rodriguez 405b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 406b2e1b302SLuis R. Rodriguez 407bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 408bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 409b2e1b302SLuis R. Rodriguez return false; 410b2e1b302SLuis R. Rodriguez 411b2e1b302SLuis R. Rodriguez return true; 412b2e1b302SLuis R. Rodriguez } 413b2e1b302SLuis R. Rodriguez 414a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 415b2e1b302SLuis R. Rodriguez { 416a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 417b2e1b302SLuis R. Rodriguez unsigned int i; 418b2e1b302SLuis R. Rodriguez 419b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 420b2e1b302SLuis R. Rodriguez return false; 421b2e1b302SLuis R. Rodriguez 42288dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 42388dc1c3fSLuis R. Rodriguez return false; 42488dc1c3fSLuis R. Rodriguez 425b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 426b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 427b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 428b2e1b302SLuis R. Rodriguez return false; 429b2e1b302SLuis R. Rodriguez } 430b2e1b302SLuis R. Rodriguez 431b2e1b302SLuis R. Rodriguez return true; 432b2e1b302SLuis R. Rodriguez } 433b2e1b302SLuis R. Rodriguez 434b2e1b302SLuis R. Rodriguez /* Returns value in KHz */ 435b2e1b302SLuis R. Rodriguez static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range, 436b2e1b302SLuis R. Rodriguez u32 freq) 437b2e1b302SLuis R. Rodriguez { 438b2e1b302SLuis R. Rodriguez unsigned int i; 439b2e1b302SLuis R. Rodriguez for (i = 0; i < ARRAY_SIZE(supported_bandwidths); i++) { 440b2e1b302SLuis R. Rodriguez u32 start_freq_khz = freq - supported_bandwidths[i]/2; 441b2e1b302SLuis R. Rodriguez u32 end_freq_khz = freq + supported_bandwidths[i]/2; 442b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 443b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 444b2e1b302SLuis R. Rodriguez return supported_bandwidths[i]; 445b2e1b302SLuis R. Rodriguez } 446b2e1b302SLuis R. Rodriguez return 0; 447b2e1b302SLuis R. Rodriguez } 448b2e1b302SLuis R. Rodriguez 4490c7dc45dSLuis R. Rodriguez /** 4500c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 4510c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 4520c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 4530c7dc45dSLuis R. Rodriguez * 4540c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 4550c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 4560c7dc45dSLuis R. Rodriguez * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is 4570c7dc45dSLuis R. Rodriguez * safe for now to assume that a frequency rule should not be part of a 4580c7dc45dSLuis R. Rodriguez * frequency's band if the start freq or end freq are off by more than 2 GHz. 4590c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 4600c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 4610c7dc45dSLuis R. Rodriguez **/ 4620c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 4630c7dc45dSLuis R. Rodriguez u32 freq_khz) 4640c7dc45dSLuis R. Rodriguez { 4650c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 4660c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4670c7dc45dSLuis R. Rodriguez return true; 4680c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4690c7dc45dSLuis R. Rodriguez return true; 4700c7dc45dSLuis R. Rodriguez return false; 4710c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 4720c7dc45dSLuis R. Rodriguez } 4730c7dc45dSLuis R. Rodriguez 474fb1fc7adSLuis R. Rodriguez /* 475fb1fc7adSLuis R. Rodriguez * Converts a country IE to a regulatory domain. A regulatory domain 4763f2355cbSLuis R. Rodriguez * structure has a lot of information which the IE doesn't yet have, 4773f2355cbSLuis R. Rodriguez * so for the other values we use upper max values as we will intersect 478fb1fc7adSLuis R. Rodriguez * with our userspace regulatory agent to get lower bounds. 479fb1fc7adSLuis R. Rodriguez */ 4803f2355cbSLuis R. Rodriguez static struct ieee80211_regdomain *country_ie_2_rd( 4813f2355cbSLuis R. Rodriguez u8 *country_ie, 4823f2355cbSLuis R. Rodriguez u8 country_ie_len, 4833f2355cbSLuis R. Rodriguez u32 *checksum) 4843f2355cbSLuis R. Rodriguez { 4853f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 4863f2355cbSLuis R. Rodriguez unsigned int i = 0; 4873f2355cbSLuis R. Rodriguez char alpha2[2]; 4883f2355cbSLuis R. Rodriguez u32 flags = 0; 4893f2355cbSLuis R. Rodriguez u32 num_rules = 0, size_of_regd = 0; 4903f2355cbSLuis R. Rodriguez u8 *triplets_start = NULL; 4913f2355cbSLuis R. Rodriguez u8 len_at_triplet = 0; 4923f2355cbSLuis R. Rodriguez /* the last channel we have registered in a subband (triplet) */ 4933f2355cbSLuis R. Rodriguez int last_sub_max_channel = 0; 4943f2355cbSLuis R. Rodriguez 4953f2355cbSLuis R. Rodriguez *checksum = 0xDEADBEEF; 4963f2355cbSLuis R. Rodriguez 4973f2355cbSLuis R. Rodriguez /* Country IE requirements */ 4983f2355cbSLuis R. Rodriguez BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || 4993f2355cbSLuis R. Rodriguez country_ie_len & 0x01); 5003f2355cbSLuis R. Rodriguez 5013f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 5023f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 5033f2355cbSLuis R. Rodriguez 5043f2355cbSLuis R. Rodriguez /* 5053f2355cbSLuis R. Rodriguez * Third octet can be: 5063f2355cbSLuis R. Rodriguez * 'I' - Indoor 5073f2355cbSLuis R. Rodriguez * 'O' - Outdoor 5083f2355cbSLuis R. Rodriguez * 5093f2355cbSLuis R. Rodriguez * anything else we assume is no restrictions 5103f2355cbSLuis R. Rodriguez */ 5113f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 5123f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_OUTDOOR; 5133f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 5143f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_INDOOR; 5153f2355cbSLuis R. Rodriguez 5163f2355cbSLuis R. Rodriguez country_ie += 3; 5173f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5183f2355cbSLuis R. Rodriguez 5193f2355cbSLuis R. Rodriguez triplets_start = country_ie; 5203f2355cbSLuis R. Rodriguez len_at_triplet = country_ie_len; 5213f2355cbSLuis R. Rodriguez 5223f2355cbSLuis R. Rodriguez *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); 5233f2355cbSLuis R. Rodriguez 524fb1fc7adSLuis R. Rodriguez /* 525fb1fc7adSLuis R. Rodriguez * We need to build a reg rule for each triplet, but first we must 5263f2355cbSLuis R. Rodriguez * calculate the number of reg rules we will need. We will need one 527fb1fc7adSLuis R. Rodriguez * for each channel subband 528fb1fc7adSLuis R. Rodriguez */ 5293f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 530615aab4bSLuis R. Rodriguez int end_channel = 0; 5313f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 5323f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 5333f2355cbSLuis R. Rodriguez int cur_sub_max_channel = 0, cur_channel = 0; 5343f2355cbSLuis R. Rodriguez 5353f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 5363f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 5373f2355cbSLuis R. Rodriguez country_ie += 3; 5383f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5393f2355cbSLuis R. Rodriguez continue; 5403f2355cbSLuis R. Rodriguez } 5413f2355cbSLuis R. Rodriguez 542615aab4bSLuis R. Rodriguez /* 2 GHz */ 543615aab4bSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 544615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 545615aab4bSLuis R. Rodriguez triplet->chans.num_channels; 546615aab4bSLuis R. Rodriguez else 547615aab4bSLuis R. Rodriguez /* 548615aab4bSLuis R. Rodriguez * 5 GHz -- For example in country IEs if the first 549615aab4bSLuis R. Rodriguez * channel given is 36 and the number of channels is 4 550615aab4bSLuis R. Rodriguez * then the individual channel numbers defined for the 551615aab4bSLuis R. Rodriguez * 5 GHz PHY by these parameters are: 36, 40, 44, and 48 552615aab4bSLuis R. Rodriguez * and not 36, 37, 38, 39. 553615aab4bSLuis R. Rodriguez * 554615aab4bSLuis R. Rodriguez * See: http://tinyurl.com/11d-clarification 555615aab4bSLuis R. Rodriguez */ 556615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 557615aab4bSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 558615aab4bSLuis R. Rodriguez 5593f2355cbSLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 560615aab4bSLuis R. Rodriguez cur_sub_max_channel = end_channel; 5613f2355cbSLuis R. Rodriguez 5623f2355cbSLuis R. Rodriguez /* Basic sanity check */ 5633f2355cbSLuis R. Rodriguez if (cur_sub_max_channel < cur_channel) 5643f2355cbSLuis R. Rodriguez return NULL; 5653f2355cbSLuis R. Rodriguez 566fb1fc7adSLuis R. Rodriguez /* 567fb1fc7adSLuis R. Rodriguez * Do not allow overlapping channels. Also channels 5683f2355cbSLuis R. Rodriguez * passed in each subband must be monotonically 569fb1fc7adSLuis R. Rodriguez * increasing 570fb1fc7adSLuis R. Rodriguez */ 5713f2355cbSLuis R. Rodriguez if (last_sub_max_channel) { 5723f2355cbSLuis R. Rodriguez if (cur_channel <= last_sub_max_channel) 5733f2355cbSLuis R. Rodriguez return NULL; 5743f2355cbSLuis R. Rodriguez if (cur_sub_max_channel <= last_sub_max_channel) 5753f2355cbSLuis R. Rodriguez return NULL; 5763f2355cbSLuis R. Rodriguez } 5773f2355cbSLuis R. Rodriguez 578fb1fc7adSLuis R. Rodriguez /* 579fb1fc7adSLuis R. Rodriguez * When dot11RegulatoryClassesRequired is supported 5803f2355cbSLuis R. Rodriguez * we can throw ext triplets as part of this soup, 5813f2355cbSLuis R. Rodriguez * for now we don't care when those change as we 582fb1fc7adSLuis R. Rodriguez * don't support them 583fb1fc7adSLuis R. Rodriguez */ 5843f2355cbSLuis R. Rodriguez *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | 5853f2355cbSLuis R. Rodriguez ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | 5863f2355cbSLuis R. Rodriguez ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); 5873f2355cbSLuis R. Rodriguez 5883f2355cbSLuis R. Rodriguez last_sub_max_channel = cur_sub_max_channel; 5893f2355cbSLuis R. Rodriguez 5903f2355cbSLuis R. Rodriguez country_ie += 3; 5913f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5923f2355cbSLuis R. Rodriguez num_rules++; 5933f2355cbSLuis R. Rodriguez 594fb1fc7adSLuis R. Rodriguez /* 595fb1fc7adSLuis R. Rodriguez * Note: this is not a IEEE requirement but 596fb1fc7adSLuis R. Rodriguez * simply a memory requirement 597fb1fc7adSLuis R. Rodriguez */ 5983f2355cbSLuis R. Rodriguez if (num_rules > NL80211_MAX_SUPP_REG_RULES) 5993f2355cbSLuis R. Rodriguez return NULL; 6003f2355cbSLuis R. Rodriguez } 6013f2355cbSLuis R. Rodriguez 6023f2355cbSLuis R. Rodriguez country_ie = triplets_start; 6033f2355cbSLuis R. Rodriguez country_ie_len = len_at_triplet; 6043f2355cbSLuis R. Rodriguez 6053f2355cbSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 6063f2355cbSLuis R. Rodriguez (num_rules * sizeof(struct ieee80211_reg_rule)); 6073f2355cbSLuis R. Rodriguez 6083f2355cbSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 6093f2355cbSLuis R. Rodriguez if (!rd) 6103f2355cbSLuis R. Rodriguez return NULL; 6113f2355cbSLuis R. Rodriguez 6123f2355cbSLuis R. Rodriguez rd->n_reg_rules = num_rules; 6133f2355cbSLuis R. Rodriguez rd->alpha2[0] = alpha2[0]; 6143f2355cbSLuis R. Rodriguez rd->alpha2[1] = alpha2[1]; 6153f2355cbSLuis R. Rodriguez 6163f2355cbSLuis R. Rodriguez /* This time around we fill in the rd */ 6173f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 61802e68a3dSLuis R. Rodriguez int end_channel = 0; 6193f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 6203f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 6213f2355cbSLuis R. Rodriguez struct ieee80211_reg_rule *reg_rule = NULL; 6223f2355cbSLuis R. Rodriguez struct ieee80211_freq_range *freq_range = NULL; 6233f2355cbSLuis R. Rodriguez struct ieee80211_power_rule *power_rule = NULL; 6243f2355cbSLuis R. Rodriguez 625fb1fc7adSLuis R. Rodriguez /* 626fb1fc7adSLuis R. Rodriguez * Must parse if dot11RegulatoryClassesRequired is true, 627fb1fc7adSLuis R. Rodriguez * we don't support this yet 628fb1fc7adSLuis R. Rodriguez */ 6293f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 6303f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 6313f2355cbSLuis R. Rodriguez country_ie += 3; 6323f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6333f2355cbSLuis R. Rodriguez continue; 6343f2355cbSLuis R. Rodriguez } 6353f2355cbSLuis R. Rodriguez 6363f2355cbSLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 6373f2355cbSLuis R. Rodriguez freq_range = ®_rule->freq_range; 6383f2355cbSLuis R. Rodriguez power_rule = ®_rule->power_rule; 6393f2355cbSLuis R. Rodriguez 6403f2355cbSLuis R. Rodriguez reg_rule->flags = flags; 6413f2355cbSLuis R. Rodriguez 64202e68a3dSLuis R. Rodriguez /* 2 GHz */ 64302e68a3dSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 64402e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 64502e68a3dSLuis R. Rodriguez triplet->chans.num_channels; 64602e68a3dSLuis R. Rodriguez else 64702e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 64802e68a3dSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 64902e68a3dSLuis R. Rodriguez 650fb1fc7adSLuis R. Rodriguez /* 651fb1fc7adSLuis R. Rodriguez * The +10 is since the regulatory domain expects 6523f2355cbSLuis R. Rodriguez * the actual band edge, not the center of freq for 6533f2355cbSLuis R. Rodriguez * its start and end freqs, assuming 20 MHz bandwidth on 654fb1fc7adSLuis R. Rodriguez * the channels passed 655fb1fc7adSLuis R. Rodriguez */ 6563f2355cbSLuis R. Rodriguez freq_range->start_freq_khz = 6573f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 6583f2355cbSLuis R. Rodriguez triplet->chans.first_channel) - 10); 6593f2355cbSLuis R. Rodriguez freq_range->end_freq_khz = 6603f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 66102e68a3dSLuis R. Rodriguez end_channel) + 10); 6623f2355cbSLuis R. Rodriguez 663fb1fc7adSLuis R. Rodriguez /* 664fb1fc7adSLuis R. Rodriguez * These are large arbitrary values we use to intersect later. 665fb1fc7adSLuis R. Rodriguez * Increment this if we ever support >= 40 MHz channels 666fb1fc7adSLuis R. Rodriguez * in IEEE 802.11 667fb1fc7adSLuis R. Rodriguez */ 6683f2355cbSLuis R. Rodriguez freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); 6693f2355cbSLuis R. Rodriguez power_rule->max_antenna_gain = DBI_TO_MBI(100); 6703f2355cbSLuis R. Rodriguez power_rule->max_eirp = DBM_TO_MBM(100); 6713f2355cbSLuis R. Rodriguez 6723f2355cbSLuis R. Rodriguez country_ie += 3; 6733f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6743f2355cbSLuis R. Rodriguez i++; 6753f2355cbSLuis R. Rodriguez 6763f2355cbSLuis R. Rodriguez BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); 6773f2355cbSLuis R. Rodriguez } 6783f2355cbSLuis R. Rodriguez 6793f2355cbSLuis R. Rodriguez return rd; 6803f2355cbSLuis R. Rodriguez } 6813f2355cbSLuis R. Rodriguez 6823f2355cbSLuis R. Rodriguez 683fb1fc7adSLuis R. Rodriguez /* 684fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 685fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 686fb1fc7adSLuis R. Rodriguez */ 6879c96477dSLuis R. Rodriguez static int reg_rules_intersect( 6889c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 6899c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 6909c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 6919c96477dSLuis R. Rodriguez { 6929c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 6939c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 6949c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 6959c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 6969c96477dSLuis R. Rodriguez u32 freq_diff; 6979c96477dSLuis R. Rodriguez 6989c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 6999c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 7009c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 7019c96477dSLuis R. Rodriguez 7029c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 7039c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 7049c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 7059c96477dSLuis R. Rodriguez 7069c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 7079c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 7089c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 7099c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 7109c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 7119c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 7129c96477dSLuis R. Rodriguez 7139c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 7149c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 7159c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 7169c96477dSLuis R. Rodriguez 7179c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 7189c96477dSLuis R. Rodriguez power_rule2->max_eirp); 7199c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 7209c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 7219c96477dSLuis R. Rodriguez 7229c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 7239c96477dSLuis R. Rodriguez 7249c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 7259c96477dSLuis R. Rodriguez return -EINVAL; 7269c96477dSLuis R. Rodriguez 7279c96477dSLuis R. Rodriguez return 0; 7289c96477dSLuis R. Rodriguez } 7299c96477dSLuis R. Rodriguez 7309c96477dSLuis R. Rodriguez /** 7319c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 7329c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 7339c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 7349c96477dSLuis R. Rodriguez * 7359c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 7369c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 7379c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 7389c96477dSLuis R. Rodriguez * 7399c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 7409c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 7419c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 7429c96477dSLuis R. Rodriguez */ 7439c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 7449c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 7459c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 7469c96477dSLuis R. Rodriguez { 7479c96477dSLuis R. Rodriguez int r, size_of_regd; 7489c96477dSLuis R. Rodriguez unsigned int x, y; 7499c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 7509c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 7519c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 7529c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 7539c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 7549c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 7559c96477dSLuis R. Rodriguez 7569c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 7579c96477dSLuis R. Rodriguez intersected_rule = &irule; 7589c96477dSLuis R. Rodriguez 7599c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 7609c96477dSLuis R. Rodriguez 7619c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 7629c96477dSLuis R. Rodriguez return NULL; 7639c96477dSLuis R. Rodriguez 764fb1fc7adSLuis R. Rodriguez /* 765fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 7669c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 7679c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 7689c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 769fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 770fb1fc7adSLuis R. Rodriguez */ 7719c96477dSLuis R. Rodriguez 7729c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7739c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7749c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7759c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 7769c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 7779c96477dSLuis R. Rodriguez intersected_rule)) 7789c96477dSLuis R. Rodriguez num_rules++; 7799c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 7809c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 7819c96477dSLuis R. Rodriguez } 7829c96477dSLuis R. Rodriguez } 7839c96477dSLuis R. Rodriguez 7849c96477dSLuis R. Rodriguez if (!num_rules) 7859c96477dSLuis R. Rodriguez return NULL; 7869c96477dSLuis R. Rodriguez 7879c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 7889c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 7899c96477dSLuis R. Rodriguez 7909c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 7919c96477dSLuis R. Rodriguez if (!rd) 7929c96477dSLuis R. Rodriguez return NULL; 7939c96477dSLuis R. Rodriguez 7949c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7959c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7969c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7979c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 798fb1fc7adSLuis R. Rodriguez /* 799fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 8009c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 801fb1fc7adSLuis R. Rodriguez * a memcpy() 802fb1fc7adSLuis R. Rodriguez */ 8039c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 8049c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 8059c96477dSLuis R. Rodriguez intersected_rule); 806fb1fc7adSLuis R. Rodriguez /* 807fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 808fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 809fb1fc7adSLuis R. Rodriguez */ 8109c96477dSLuis R. Rodriguez if (r) 8119c96477dSLuis R. Rodriguez continue; 8129c96477dSLuis R. Rodriguez rule_idx++; 8139c96477dSLuis R. Rodriguez } 8149c96477dSLuis R. Rodriguez } 8159c96477dSLuis R. Rodriguez 8169c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 8179c96477dSLuis R. Rodriguez kfree(rd); 8189c96477dSLuis R. Rodriguez return NULL; 8199c96477dSLuis R. Rodriguez } 8209c96477dSLuis R. Rodriguez 8219c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 8229c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 8239c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 8249c96477dSLuis R. Rodriguez 8259c96477dSLuis R. Rodriguez return rd; 8269c96477dSLuis R. Rodriguez } 8279c96477dSLuis R. Rodriguez 828fb1fc7adSLuis R. Rodriguez /* 829fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 830fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 831fb1fc7adSLuis R. Rodriguez */ 832b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 833b2e1b302SLuis R. Rodriguez { 834b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 835b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 836b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 837b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 838b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 839b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 840b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 841b2e1b302SLuis R. Rodriguez return channel_flags; 842b2e1b302SLuis R. Rodriguez } 843b2e1b302SLuis R. Rodriguez 8441fa25e41SLuis R. Rodriguez static int freq_reg_info_regd(struct wiphy *wiphy, 8451fa25e41SLuis R. Rodriguez u32 center_freq, 8461fa25e41SLuis R. Rodriguez u32 *bandwidth, 8471fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 8481fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *custom_regd) 8498318d78aSJohannes Berg { 8508318d78aSJohannes Berg int i; 8510c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 8523e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *regd; 853b2e1b302SLuis R. Rodriguez u32 max_bandwidth = 0; 8548318d78aSJohannes Berg 8551fa25e41SLuis R. Rodriguez regd = custom_regd ? custom_regd : cfg80211_regdomain; 8563e0c3ff3SLuis R. Rodriguez 857fb1fc7adSLuis R. Rodriguez /* 858fb1fc7adSLuis R. Rodriguez * Follow the driver's regulatory domain, if present, unless a country 859fb1fc7adSLuis R. Rodriguez * IE has been processed or a user wants to help complaince further 860fb1fc7adSLuis R. Rodriguez */ 8617db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 8627db90f4aSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_USER && 8633e0c3ff3SLuis R. Rodriguez wiphy->regd) 8643e0c3ff3SLuis R. Rodriguez regd = wiphy->regd; 8653e0c3ff3SLuis R. Rodriguez 8663e0c3ff3SLuis R. Rodriguez if (!regd) 867b2e1b302SLuis R. Rodriguez return -EINVAL; 868b2e1b302SLuis R. Rodriguez 8693e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 870b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 871b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 872b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 873b2e1b302SLuis R. Rodriguez 8743e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 875b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 876b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 8770c7dc45dSLuis R. Rodriguez 878fb1fc7adSLuis R. Rodriguez /* 879fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 8800c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 881fb1fc7adSLuis R. Rodriguez * not overwrite it once found 882fb1fc7adSLuis R. Rodriguez */ 8830c7dc45dSLuis R. Rodriguez if (!band_rule_found) 8840c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 8850c7dc45dSLuis R. Rodriguez 886b2e1b302SLuis R. Rodriguez max_bandwidth = freq_max_bandwidth(fr, center_freq); 8870c7dc45dSLuis R. Rodriguez 888b2e1b302SLuis R. Rodriguez if (max_bandwidth && *bandwidth <= max_bandwidth) { 889b2e1b302SLuis R. Rodriguez *reg_rule = rr; 890b2e1b302SLuis R. Rodriguez *bandwidth = max_bandwidth; 8918318d78aSJohannes Berg break; 8928318d78aSJohannes Berg } 8938318d78aSJohannes Berg } 8948318d78aSJohannes Berg 8950c7dc45dSLuis R. Rodriguez if (!band_rule_found) 8960c7dc45dSLuis R. Rodriguez return -ERANGE; 8970c7dc45dSLuis R. Rodriguez 898b2e1b302SLuis R. Rodriguez return !max_bandwidth; 899b2e1b302SLuis R. Rodriguez } 90034f57347SLuis R. Rodriguez EXPORT_SYMBOL(freq_reg_info); 901b2e1b302SLuis R. Rodriguez 90234f57347SLuis R. Rodriguez int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth, 9031fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 9041fa25e41SLuis R. Rodriguez { 9051fa25e41SLuis R. Rodriguez return freq_reg_info_regd(wiphy, center_freq, 9061fa25e41SLuis R. Rodriguez bandwidth, reg_rule, NULL); 9071fa25e41SLuis R. Rodriguez } 908b2e1b302SLuis R. Rodriguez 909a92a3ce7SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, 910a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 911b2e1b302SLuis R. Rodriguez { 912b2e1b302SLuis R. Rodriguez int r; 913a92a3ce7SLuis R. Rodriguez u32 flags; 914b2e1b302SLuis R. Rodriguez u32 max_bandwidth = 0; 915b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 916b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 917a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 918a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 919fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 920a92a3ce7SLuis R. Rodriguez 921761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 922761cf7ecSLuis R. Rodriguez 923806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 924806a9e39SLuis R. Rodriguez 925a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 926a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 927a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 928a92a3ce7SLuis R. Rodriguez 929a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 930b2e1b302SLuis R. Rodriguez 9313e0c3ff3SLuis R. Rodriguez r = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq), 932b2e1b302SLuis R. Rodriguez &max_bandwidth, ®_rule); 933b2e1b302SLuis R. Rodriguez 934b2e1b302SLuis R. Rodriguez if (r) { 935fb1fc7adSLuis R. Rodriguez /* 936fb1fc7adSLuis R. Rodriguez * This means no regulatory rule was found in the country IE 9370c7dc45dSLuis R. Rodriguez * with a frequency range on the center_freq's band, since 9380c7dc45dSLuis R. Rodriguez * IEEE-802.11 allows for a country IE to have a subset of the 9390c7dc45dSLuis R. Rodriguez * regulatory information provided in a country we ignore 9400c7dc45dSLuis R. Rodriguez * disabling the channel unless at least one reg rule was 9410c7dc45dSLuis R. Rodriguez * found on the center_freq's band. For details see this 9420c7dc45dSLuis R. Rodriguez * clarification: 9430c7dc45dSLuis R. Rodriguez * 9440c7dc45dSLuis R. Rodriguez * http://tinyurl.com/11d-clarification 9450c7dc45dSLuis R. Rodriguez */ 9460c7dc45dSLuis R. Rodriguez if (r == -ERANGE && 9477db90f4aSLuis R. Rodriguez last_request->initiator == 9487db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 9490c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 9500c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Leaving channel %d MHz " 9510c7dc45dSLuis R. Rodriguez "intact on %s - no rule found in band on " 9520c7dc45dSLuis R. Rodriguez "Country IE\n", 9530c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 9540c7dc45dSLuis R. Rodriguez #endif 9550c7dc45dSLuis R. Rodriguez } else { 956fb1fc7adSLuis R. Rodriguez /* 957fb1fc7adSLuis R. Rodriguez * In this case we know the country IE has at least one reg rule 958fb1fc7adSLuis R. Rodriguez * for the band so we respect its band definitions 959fb1fc7adSLuis R. Rodriguez */ 9600c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 9617db90f4aSLuis R. Rodriguez if (last_request->initiator == 9627db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) 9630c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Disabling " 9640c7dc45dSLuis R. Rodriguez "channel %d MHz on %s due to " 9650c7dc45dSLuis R. Rodriguez "Country IE\n", 9660c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 9670c7dc45dSLuis R. Rodriguez #endif 9688318d78aSJohannes Berg flags |= IEEE80211_CHAN_DISABLED; 9698318d78aSJohannes Berg chan->flags = flags; 9700c7dc45dSLuis R. Rodriguez } 9718318d78aSJohannes Berg return; 9728318d78aSJohannes Berg } 9738318d78aSJohannes Berg 974b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 975b2e1b302SLuis R. Rodriguez 9767db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 977806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 978806a9e39SLuis R. Rodriguez request_wiphy->strict_regulatory) { 979fb1fc7adSLuis R. Rodriguez /* 980fb1fc7adSLuis R. Rodriguez * This gaurantees the driver's requested regulatory domain 981f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 982fb1fc7adSLuis R. Rodriguez * settings 983fb1fc7adSLuis R. Rodriguez */ 984f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 985f976376dSLuis R. Rodriguez map_regdom_flags(reg_rule->flags); 986f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 987f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 988f976376dSLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); 989f976376dSLuis R. Rodriguez chan->max_power = chan->orig_mpwr = 990f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 991f976376dSLuis R. Rodriguez return; 992f976376dSLuis R. Rodriguez } 993f976376dSLuis R. Rodriguez 994b2e1b302SLuis R. Rodriguez chan->flags = flags | map_regdom_flags(reg_rule->flags); 9958318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 996b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 997b2e1b302SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); 998253898c4SJohn W. Linville if (chan->orig_mpwr) 999b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 1000b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 1001253898c4SJohn W. Linville else 1002b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 10038318d78aSJohannes Berg } 10048318d78aSJohannes Berg 1005a92a3ce7SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) 10068318d78aSJohannes Berg { 1007a92a3ce7SLuis R. Rodriguez unsigned int i; 1008a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1009a92a3ce7SLuis R. Rodriguez 1010a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1011a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 10128318d78aSJohannes Berg 10138318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 1014a92a3ce7SLuis R. Rodriguez handle_channel(wiphy, band, i); 10158318d78aSJohannes Berg } 10168318d78aSJohannes Berg 10177db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 10187db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 101914b9815aSLuis R. Rodriguez { 102014b9815aSLuis R. Rodriguez if (!last_request) 102114b9815aSLuis R. Rodriguez return true; 10227db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 10232a44f911SLuis R. Rodriguez wiphy->custom_regulatory) 102414b9815aSLuis R. Rodriguez return true; 1025fb1fc7adSLuis R. Rodriguez /* 1026fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1027fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1028fb1fc7adSLuis R. Rodriguez */ 1029f976376dSLuis R. Rodriguez if (wiphy->strict_regulatory && !wiphy->regd && 1030f976376dSLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) 103114b9815aSLuis R. Rodriguez return true; 103214b9815aSLuis R. Rodriguez return false; 103314b9815aSLuis R. Rodriguez } 103414b9815aSLuis R. Rodriguez 10357db90f4aSLuis R. Rodriguez static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 1036b2e1b302SLuis R. Rodriguez { 1037b2e1b302SLuis R. Rodriguez struct cfg80211_registered_device *drv; 1038b2e1b302SLuis R. Rodriguez 1039b2e1b302SLuis R. Rodriguez list_for_each_entry(drv, &cfg80211_drv_list, list) 10407db90f4aSLuis R. Rodriguez wiphy_update_regulatory(&drv->wiphy, initiator); 1041b2e1b302SLuis R. Rodriguez } 1042b2e1b302SLuis R. Rodriguez 1043e38f8a7aSLuis R. Rodriguez static void handle_reg_beacon(struct wiphy *wiphy, 1044e38f8a7aSLuis R. Rodriguez unsigned int chan_idx, 1045e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1046e38f8a7aSLuis R. Rodriguez { 1047e38f8a7aSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 1048e38f8a7aSLuis R. Rodriguez #define REG_DEBUG_BEACON_FLAG(desc) \ 1049e38f8a7aSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Enabling " desc " on " \ 1050e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", \ 1051e38f8a7aSLuis R. Rodriguez reg_beacon->chan.center_freq, \ 1052e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(reg_beacon->chan.center_freq), \ 1053e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 1054e38f8a7aSLuis R. Rodriguez #else 1055e38f8a7aSLuis R. Rodriguez #define REG_DEBUG_BEACON_FLAG(desc) do {} while (0) 1056e38f8a7aSLuis R. Rodriguez #endif 1057e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1058e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 1059e38f8a7aSLuis R. Rodriguez 1060e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1061e38f8a7aSLuis R. Rodriguez 1062e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1063e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1064e38f8a7aSLuis R. Rodriguez 1065e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1066e38f8a7aSLuis R. Rodriguez return; 1067e38f8a7aSLuis R. Rodriguez 1068e38f8a7aSLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { 1069e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 1070e38f8a7aSLuis R. Rodriguez REG_DEBUG_BEACON_FLAG("active scanning"); 1071e38f8a7aSLuis R. Rodriguez } 1072e38f8a7aSLuis R. Rodriguez 1073e38f8a7aSLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IBSS) { 1074e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 1075e38f8a7aSLuis R. Rodriguez REG_DEBUG_BEACON_FLAG("beaconing"); 1076e38f8a7aSLuis R. Rodriguez } 1077e38f8a7aSLuis R. Rodriguez 1078e38f8a7aSLuis R. Rodriguez chan->beacon_found = true; 1079e38f8a7aSLuis R. Rodriguez #undef REG_DEBUG_BEACON_FLAG 1080e38f8a7aSLuis R. Rodriguez } 1081e38f8a7aSLuis R. Rodriguez 1082e38f8a7aSLuis R. Rodriguez /* 1083e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1084e38f8a7aSLuis R. Rodriguez * new channel 1085e38f8a7aSLuis R. Rodriguez */ 1086e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1087e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1088e38f8a7aSLuis R. Rodriguez { 1089e38f8a7aSLuis R. Rodriguez unsigned int i; 1090e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1091e38f8a7aSLuis R. Rodriguez 1092e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1093e38f8a7aSLuis R. Rodriguez 1094e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1095e38f8a7aSLuis R. Rodriguez return; 1096e38f8a7aSLuis R. Rodriguez 1097e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1098e38f8a7aSLuis R. Rodriguez 1099e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1100e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1101e38f8a7aSLuis R. Rodriguez } 1102e38f8a7aSLuis R. Rodriguez 1103e38f8a7aSLuis R. Rodriguez /* 1104e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1105e38f8a7aSLuis R. Rodriguez */ 1106e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1107e38f8a7aSLuis R. Rodriguez { 1108e38f8a7aSLuis R. Rodriguez unsigned int i; 1109e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1110e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1111e38f8a7aSLuis R. Rodriguez 1112e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1113e38f8a7aSLuis R. Rodriguez 1114e38f8a7aSLuis R. Rodriguez if (list_empty(®_beacon_list)) 1115e38f8a7aSLuis R. Rodriguez return; 1116e38f8a7aSLuis R. Rodriguez 1117e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1118e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1119e38f8a7aSLuis R. Rodriguez continue; 1120e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1121e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1122e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1123e38f8a7aSLuis R. Rodriguez } 1124e38f8a7aSLuis R. Rodriguez } 1125e38f8a7aSLuis R. Rodriguez 1126e38f8a7aSLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 1127e38f8a7aSLuis R. Rodriguez { 1128e38f8a7aSLuis R. Rodriguez if (is_world_regdom(cfg80211_regdomain->alpha2) || 1129e38f8a7aSLuis R. Rodriguez (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) 1130e38f8a7aSLuis R. Rodriguez return true; 11317db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1132e38f8a7aSLuis R. Rodriguez wiphy->custom_regulatory) 1133e38f8a7aSLuis R. Rodriguez return true; 1134e38f8a7aSLuis R. Rodriguez return false; 1135e38f8a7aSLuis R. Rodriguez } 1136e38f8a7aSLuis R. Rodriguez 1137e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1138e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1139e38f8a7aSLuis R. Rodriguez { 1140e38f8a7aSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 1141e38f8a7aSLuis R. Rodriguez return; 1142e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1143e38f8a7aSLuis R. Rodriguez } 1144e38f8a7aSLuis R. Rodriguez 11457db90f4aSLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, 11467db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 11478318d78aSJohannes Berg { 11488318d78aSJohannes Berg enum ieee80211_band band; 1149d46e5b1dSLuis R. Rodriguez 11507db90f4aSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) 1151e38f8a7aSLuis R. Rodriguez goto out; 1152b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 11538318d78aSJohannes Berg if (wiphy->bands[band]) 1154a92a3ce7SLuis R. Rodriguez handle_band(wiphy, band); 1155b2e1b302SLuis R. Rodriguez } 1156e38f8a7aSLuis R. Rodriguez out: 1157e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1158b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1159716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 1160b2e1b302SLuis R. Rodriguez } 1161b2e1b302SLuis R. Rodriguez 11621fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 11631fa25e41SLuis R. Rodriguez enum ieee80211_band band, 11641fa25e41SLuis R. Rodriguez unsigned int chan_idx, 11651fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 11661fa25e41SLuis R. Rodriguez { 11671fa25e41SLuis R. Rodriguez int r; 11681fa25e41SLuis R. Rodriguez u32 max_bandwidth = 0; 11691fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 11701fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 11711fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 11721fa25e41SLuis R. Rodriguez struct ieee80211_channel *chan; 11731fa25e41SLuis R. Rodriguez 11741fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 11751fa25e41SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 11761fa25e41SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 11771fa25e41SLuis R. Rodriguez 11781fa25e41SLuis R. Rodriguez r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), 11791fa25e41SLuis R. Rodriguez &max_bandwidth, ®_rule, regd); 11801fa25e41SLuis R. Rodriguez 11811fa25e41SLuis R. Rodriguez if (r) { 11821fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 11831fa25e41SLuis R. Rodriguez return; 11841fa25e41SLuis R. Rodriguez } 11851fa25e41SLuis R. Rodriguez 11861fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 11871fa25e41SLuis R. Rodriguez 11881fa25e41SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags); 11891fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 11901fa25e41SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); 11911fa25e41SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 11921fa25e41SLuis R. Rodriguez } 11931fa25e41SLuis R. Rodriguez 11941fa25e41SLuis R. Rodriguez static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, 11951fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 11961fa25e41SLuis R. Rodriguez { 11971fa25e41SLuis R. Rodriguez unsigned int i; 11981fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 11991fa25e41SLuis R. Rodriguez 12001fa25e41SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 12011fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 12021fa25e41SLuis R. Rodriguez 12031fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 12041fa25e41SLuis R. Rodriguez handle_channel_custom(wiphy, band, i, regd); 12051fa25e41SLuis R. Rodriguez } 12061fa25e41SLuis R. Rodriguez 12071fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 12081fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 12091fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12101fa25e41SLuis R. Rodriguez { 12111fa25e41SLuis R. Rodriguez enum ieee80211_band band; 12121fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 12131fa25e41SLuis R. Rodriguez if (wiphy->bands[band]) 12141fa25e41SLuis R. Rodriguez handle_band_custom(wiphy, band, regd); 12151fa25e41SLuis R. Rodriguez } 12161fa25e41SLuis R. Rodriguez } 12171fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 12181fa25e41SLuis R. Rodriguez 12193e0c3ff3SLuis R. Rodriguez static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, 12203e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *src_regd) 12213e0c3ff3SLuis R. Rodriguez { 12223e0c3ff3SLuis R. Rodriguez struct ieee80211_regdomain *regd; 12233e0c3ff3SLuis R. Rodriguez int size_of_regd = 0; 12243e0c3ff3SLuis R. Rodriguez unsigned int i; 12253e0c3ff3SLuis R. Rodriguez 12263e0c3ff3SLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 12273e0c3ff3SLuis R. Rodriguez ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); 12283e0c3ff3SLuis R. Rodriguez 12293e0c3ff3SLuis R. Rodriguez regd = kzalloc(size_of_regd, GFP_KERNEL); 12303e0c3ff3SLuis R. Rodriguez if (!regd) 12313e0c3ff3SLuis R. Rodriguez return -ENOMEM; 12323e0c3ff3SLuis R. Rodriguez 12333e0c3ff3SLuis R. Rodriguez memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 12343e0c3ff3SLuis R. Rodriguez 12353e0c3ff3SLuis R. Rodriguez for (i = 0; i < src_regd->n_reg_rules; i++) 12363e0c3ff3SLuis R. Rodriguez memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 12373e0c3ff3SLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 12383e0c3ff3SLuis R. Rodriguez 12393e0c3ff3SLuis R. Rodriguez *dst_regd = regd; 12403e0c3ff3SLuis R. Rodriguez return 0; 1241b2e1b302SLuis R. Rodriguez } 1242b2e1b302SLuis R. Rodriguez 1243fb1fc7adSLuis R. Rodriguez /* 1244fb1fc7adSLuis R. Rodriguez * Return value which can be used by ignore_request() to indicate 1245fb1fc7adSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains 1246fb1fc7adSLuis R. Rodriguez */ 12479c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 12489c96477dSLuis R. Rodriguez 124984fa4f43SJohannes Berg /* This has the logic which determines when a new request 125084fa4f43SJohannes Berg * should be ignored. */ 12512f92cd2eSLuis R. Rodriguez static int ignore_request(struct wiphy *wiphy, 12522f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 125384fa4f43SJohannes Berg { 1254806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1255761cf7ecSLuis R. Rodriguez 1256761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1257761cf7ecSLuis R. Rodriguez 125884fa4f43SJohannes Berg /* All initial requests are respected */ 125984fa4f43SJohannes Berg if (!last_request) 126084fa4f43SJohannes Berg return 0; 126184fa4f43SJohannes Berg 12622f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 12637db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 1264ba25c141SLuis R. Rodriguez return -EINVAL; 12657db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1266806a9e39SLuis R. Rodriguez 1267806a9e39SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1268806a9e39SLuis R. Rodriguez 12692f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 127084fa4f43SJohannes Berg return -EINVAL; 12717db90f4aSLuis R. Rodriguez if (last_request->initiator == 12727db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1273806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 127484fa4f43SJohannes Berg /* 127584fa4f43SJohannes Berg * Two cards with two APs claiming different 127684fa4f43SJohannes Berg * different Country IE alpha2s. We could 127784fa4f43SJohannes Berg * intersect them, but that seems unlikely 127884fa4f43SJohannes Berg * to be correct. Reject second one for now. 127984fa4f43SJohannes Berg */ 12802f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 128184fa4f43SJohannes Berg return -EOPNOTSUPP; 128284fa4f43SJohannes Berg return -EALREADY; 128384fa4f43SJohannes Berg } 1284fb1fc7adSLuis R. Rodriguez /* 1285fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1286fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1287fb1fc7adSLuis R. Rodriguez */ 12882f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 128984fa4f43SJohannes Berg return 0; 129084fa4f43SJohannes Berg return -EALREADY; 129184fa4f43SJohannes Berg } 12923f2355cbSLuis R. Rodriguez return REG_INTERSECT; 12937db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 12947db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { 1295e74b1e7fSLuis R. Rodriguez if (is_old_static_regdom(cfg80211_regdomain)) 129684fa4f43SJohannes Berg return 0; 12972f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 1298e74b1e7fSLuis R. Rodriguez return 0; 1299e74b1e7fSLuis R. Rodriguez return -EALREADY; 1300e74b1e7fSLuis R. Rodriguez } 1301fff32c04SLuis R. Rodriguez 1302fff32c04SLuis R. Rodriguez /* 1303fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1304fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1305fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1306fff32c04SLuis R. Rodriguez */ 13077db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 13082f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1309fff32c04SLuis R. Rodriguez return -EALREADY; 1310fff32c04SLuis R. Rodriguez 13113e0c3ff3SLuis R. Rodriguez return REG_INTERSECT; 13127db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 13137db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 13149c96477dSLuis R. Rodriguez return REG_INTERSECT; 1315fb1fc7adSLuis R. Rodriguez /* 1316fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1317fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1318fb1fc7adSLuis R. Rodriguez */ 13197db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && 13203f2355cbSLuis R. Rodriguez last_request->intersect) 13213f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 1322fb1fc7adSLuis R. Rodriguez /* 1323fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1324fb1fc7adSLuis R. Rodriguez * requests have been processed 1325fb1fc7adSLuis R. Rodriguez */ 13267db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || 13277db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || 13287db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 132969b1572bSLuis R. Rodriguez if (regdom_changes(last_request->alpha2)) 13305eebade6SLuis R. Rodriguez return -EAGAIN; 13315eebade6SLuis R. Rodriguez } 13325eebade6SLuis R. Rodriguez 1333e74b1e7fSLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 13342f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1335e74b1e7fSLuis R. Rodriguez return -EALREADY; 1336e74b1e7fSLuis R. Rodriguez 133784fa4f43SJohannes Berg return 0; 133884fa4f43SJohannes Berg } 133984fa4f43SJohannes Berg 134084fa4f43SJohannes Berg return -EINVAL; 134184fa4f43SJohannes Berg } 134284fa4f43SJohannes Berg 1343d1c96a9aSLuis R. Rodriguez /** 1344d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1345d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1346d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 134728da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1348d1c96a9aSLuis R. Rodriguez * 1349d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 135028da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1351d1c96a9aSLuis R. Rodriguez * 1352d1c96a9aSLuis R. Rodriguez * Returns zero if all went fine, %-EALREADY if a regulatory domain had 1353d1c96a9aSLuis R. Rodriguez * already been set or other standard error codes. 1354d1c96a9aSLuis R. Rodriguez * 1355d1c96a9aSLuis R. Rodriguez * Caller must hold &cfg80211_mutex 1356d1c96a9aSLuis R. Rodriguez */ 135728da32d7SLuis R. Rodriguez static int __regulatory_hint(struct wiphy *wiphy, 135828da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1359b2e1b302SLuis R. Rodriguez { 13609c96477dSLuis R. Rodriguez bool intersect = false; 1361b2e1b302SLuis R. Rodriguez int r = 0; 1362b2e1b302SLuis R. Rodriguez 1363761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1364761cf7ecSLuis R. Rodriguez 13652f92cd2eSLuis R. Rodriguez r = ignore_request(wiphy, pending_request); 13669c96477dSLuis R. Rodriguez 13673e0c3ff3SLuis R. Rodriguez if (r == REG_INTERSECT) { 13687db90f4aSLuis R. Rodriguez if (pending_request->initiator == 13697db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 13703e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1371d951c1ddSLuis R. Rodriguez if (r) { 1372d951c1ddSLuis R. Rodriguez kfree(pending_request); 1373b2e1b302SLuis R. Rodriguez return r; 13743e0c3ff3SLuis R. Rodriguez } 1375d951c1ddSLuis R. Rodriguez } 13763e0c3ff3SLuis R. Rodriguez intersect = true; 13773e0c3ff3SLuis R. Rodriguez } else if (r) { 1378fb1fc7adSLuis R. Rodriguez /* 1379fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 13803e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1381fb1fc7adSLuis R. Rodriguez * wiphy 1382fb1fc7adSLuis R. Rodriguez */ 138328da32d7SLuis R. Rodriguez if (r == -EALREADY && 13847db90f4aSLuis R. Rodriguez pending_request->initiator == 13857db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 13863e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1387d951c1ddSLuis R. Rodriguez if (r) { 1388d951c1ddSLuis R. Rodriguez kfree(pending_request); 13893e0c3ff3SLuis R. Rodriguez return r; 1390d951c1ddSLuis R. Rodriguez } 13913e0c3ff3SLuis R. Rodriguez r = -EALREADY; 13923e0c3ff3SLuis R. Rodriguez goto new_request; 13933e0c3ff3SLuis R. Rodriguez } 1394d951c1ddSLuis R. Rodriguez kfree(pending_request); 13953e0c3ff3SLuis R. Rodriguez return r; 13963e0c3ff3SLuis R. Rodriguez } 1397b2e1b302SLuis R. Rodriguez 13983e0c3ff3SLuis R. Rodriguez new_request: 1399f6037d09SJohannes Berg kfree(last_request); 1400d951c1ddSLuis R. Rodriguez 1401d951c1ddSLuis R. Rodriguez last_request = pending_request; 1402d951c1ddSLuis R. Rodriguez last_request->intersect = intersect; 1403d951c1ddSLuis R. Rodriguez 1404d951c1ddSLuis R. Rodriguez pending_request = NULL; 14053e0c3ff3SLuis R. Rodriguez 14063e0c3ff3SLuis R. Rodriguez /* When r == REG_INTERSECT we do need to call CRDA */ 140773d54c9eSLuis R. Rodriguez if (r < 0) { 140873d54c9eSLuis R. Rodriguez /* 140973d54c9eSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 141073d54c9eSLuis R. Rodriguez * have applied the requested regulatory domain before we just 141173d54c9eSLuis R. Rodriguez * inform userspace we have processed the request 141273d54c9eSLuis R. Rodriguez */ 141373d54c9eSLuis R. Rodriguez if (r == -EALREADY) 141473d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 14153e0c3ff3SLuis R. Rodriguez return r; 141673d54c9eSLuis R. Rodriguez } 14173e0c3ff3SLuis R. Rodriguez 14183f2355cbSLuis R. Rodriguez /* 14193f2355cbSLuis R. Rodriguez * Note: When CONFIG_WIRELESS_OLD_REGULATORY is enabled 14203f2355cbSLuis R. Rodriguez * AND if CRDA is NOT present nothing will happen, if someone 14213f2355cbSLuis R. Rodriguez * wants to bother with 11d with OLD_REG you can add a timer. 14223f2355cbSLuis R. Rodriguez * If after x amount of time nothing happens you can call: 14233f2355cbSLuis R. Rodriguez * 14243f2355cbSLuis R. Rodriguez * return set_regdom(country_ie_regdomain); 14253f2355cbSLuis R. Rodriguez * 14263f2355cbSLuis R. Rodriguez * to intersect with the static rd 14273f2355cbSLuis R. Rodriguez */ 1428d951c1ddSLuis R. Rodriguez return call_crda(last_request->alpha2); 1429b2e1b302SLuis R. Rodriguez } 1430b2e1b302SLuis R. Rodriguez 1431fe33eb39SLuis R. Rodriguez /* This currently only processes user and driver regulatory hints */ 1432d951c1ddSLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 1433fe33eb39SLuis R. Rodriguez { 1434fe33eb39SLuis R. Rodriguez int r = 0; 1435fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1436fe33eb39SLuis R. Rodriguez 1437fe33eb39SLuis R. Rodriguez BUG_ON(!reg_request->alpha2); 1438fe33eb39SLuis R. Rodriguez 1439fe33eb39SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1440fe33eb39SLuis R. Rodriguez 1441fe33eb39SLuis R. Rodriguez if (wiphy_idx_valid(reg_request->wiphy_idx)) 1442fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1443fe33eb39SLuis R. Rodriguez 14447db90f4aSLuis R. Rodriguez if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1445fe33eb39SLuis R. Rodriguez !wiphy) { 1446d951c1ddSLuis R. Rodriguez kfree(reg_request); 1447fe33eb39SLuis R. Rodriguez goto out; 1448fe33eb39SLuis R. Rodriguez } 1449fe33eb39SLuis R. Rodriguez 145028da32d7SLuis R. Rodriguez r = __regulatory_hint(wiphy, reg_request); 1451fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 1452fe33eb39SLuis R. Rodriguez if (r == -EALREADY && wiphy && wiphy->strict_regulatory) 1453fe33eb39SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 1454fe33eb39SLuis R. Rodriguez out: 1455fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1456fe33eb39SLuis R. Rodriguez } 1457fe33eb39SLuis R. Rodriguez 14587db90f4aSLuis R. Rodriguez /* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */ 1459fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1460fe33eb39SLuis R. Rodriguez { 1461fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request; 1462fe33eb39SLuis R. Rodriguez 1463fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1464fe33eb39SLuis R. Rodriguez while (!list_empty(®_requests_list)) { 1465fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1466fe33eb39SLuis R. Rodriguez struct regulatory_request, 1467fe33eb39SLuis R. Rodriguez list); 1468fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1469fe33eb39SLuis R. Rodriguez 1470d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1471d951c1ddSLuis R. Rodriguez reg_process_hint(reg_request); 1472fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1473fe33eb39SLuis R. Rodriguez } 1474fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1475fe33eb39SLuis R. Rodriguez } 1476fe33eb39SLuis R. Rodriguez 1477e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1478e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1479e38f8a7aSLuis R. Rodriguez { 1480e38f8a7aSLuis R. Rodriguez struct cfg80211_registered_device *drv; 1481e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1482e38f8a7aSLuis R. Rodriguez 1483e38f8a7aSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1484e38f8a7aSLuis R. Rodriguez 1485e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1486e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1487e38f8a7aSLuis R. Rodriguez 1488e38f8a7aSLuis R. Rodriguez if (list_empty(®_pending_beacons)) { 1489e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1490e38f8a7aSLuis R. Rodriguez goto out; 1491e38f8a7aSLuis R. Rodriguez } 1492e38f8a7aSLuis R. Rodriguez 1493e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1494e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1495e38f8a7aSLuis R. Rodriguez 1496e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1497e38f8a7aSLuis R. Rodriguez 1498e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 1499e38f8a7aSLuis R. Rodriguez list_for_each_entry(drv, &cfg80211_drv_list, list) 1500e38f8a7aSLuis R. Rodriguez wiphy_update_new_beacon(&drv->wiphy, pending_beacon); 1501e38f8a7aSLuis R. Rodriguez 1502e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1503e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1504e38f8a7aSLuis R. Rodriguez } 1505e38f8a7aSLuis R. Rodriguez 1506e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1507e38f8a7aSLuis R. Rodriguez out: 1508e38f8a7aSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1509e38f8a7aSLuis R. Rodriguez } 1510e38f8a7aSLuis R. Rodriguez 1511fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1512fe33eb39SLuis R. Rodriguez { 1513fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1514e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 1515fe33eb39SLuis R. Rodriguez } 1516fe33eb39SLuis R. Rodriguez 1517fe33eb39SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 1518fe33eb39SLuis R. Rodriguez 1519fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1520fe33eb39SLuis R. Rodriguez { 1521fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1522fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1523fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1524fe33eb39SLuis R. Rodriguez 1525fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1526fe33eb39SLuis R. Rodriguez } 1527fe33eb39SLuis R. Rodriguez 1528fe33eb39SLuis R. Rodriguez /* Core regulatory hint -- happens once during cfg80211_init() */ 1529ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1530ba25c141SLuis R. Rodriguez { 1531ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1532ba25c141SLuis R. Rodriguez 1533ba25c141SLuis R. Rodriguez BUG_ON(last_request); 1534ba25c141SLuis R. Rodriguez 1535ba25c141SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1536ba25c141SLuis R. Rodriguez GFP_KERNEL); 1537ba25c141SLuis R. Rodriguez if (!request) 1538ba25c141SLuis R. Rodriguez return -ENOMEM; 1539ba25c141SLuis R. Rodriguez 1540ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1541ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 15427db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 1543ba25c141SLuis R. Rodriguez 1544fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1545ba25c141SLuis R. Rodriguez 1546fe33eb39SLuis R. Rodriguez return 0; 1547ba25c141SLuis R. Rodriguez } 1548ba25c141SLuis R. Rodriguez 1549fe33eb39SLuis R. Rodriguez /* User hints */ 1550fe33eb39SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2) 1551b2e1b302SLuis R. Rodriguez { 1552fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1553fe33eb39SLuis R. Rodriguez 1554be3d4810SJohannes Berg BUG_ON(!alpha2); 1555b2e1b302SLuis R. Rodriguez 1556fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1557fe33eb39SLuis R. Rodriguez if (!request) 1558fe33eb39SLuis R. Rodriguez return -ENOMEM; 1559fe33eb39SLuis R. Rodriguez 1560fe33eb39SLuis R. Rodriguez request->wiphy_idx = WIPHY_IDX_STALE; 1561fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1562fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 15637db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER, 1564fe33eb39SLuis R. Rodriguez 1565fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1566fe33eb39SLuis R. Rodriguez 1567fe33eb39SLuis R. Rodriguez return 0; 1568fe33eb39SLuis R. Rodriguez } 1569fe33eb39SLuis R. Rodriguez 1570fe33eb39SLuis R. Rodriguez /* Driver hints */ 1571fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1572fe33eb39SLuis R. Rodriguez { 1573fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1574fe33eb39SLuis R. Rodriguez 1575fe33eb39SLuis R. Rodriguez BUG_ON(!alpha2); 1576fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy); 1577fe33eb39SLuis R. Rodriguez 1578fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1579fe33eb39SLuis R. Rodriguez if (!request) 1580fe33eb39SLuis R. Rodriguez return -ENOMEM; 1581fe33eb39SLuis R. Rodriguez 1582fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1583fe33eb39SLuis R. Rodriguez 1584fe33eb39SLuis R. Rodriguez /* Must have registered wiphy first */ 1585fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); 1586fe33eb39SLuis R. Rodriguez 1587fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1588fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 15897db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 1590fe33eb39SLuis R. Rodriguez 1591fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1592fe33eb39SLuis R. Rodriguez 1593fe33eb39SLuis R. Rodriguez return 0; 1594b2e1b302SLuis R. Rodriguez } 1595b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1596b2e1b302SLuis R. Rodriguez 15973f2355cbSLuis R. Rodriguez static bool reg_same_country_ie_hint(struct wiphy *wiphy, 15983f2355cbSLuis R. Rodriguez u32 country_ie_checksum) 15993f2355cbSLuis R. Rodriguez { 1600806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1601806a9e39SLuis R. Rodriguez 1602761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1603761cf7ecSLuis R. Rodriguez 1604cc0b6fe8SLuis R. Rodriguez if (unlikely(last_request->initiator != 1605cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE)) 1606cc0b6fe8SLuis R. Rodriguez return false; 1607cc0b6fe8SLuis R. Rodriguez 1608806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1609806a9e39SLuis R. Rodriguez 1610806a9e39SLuis R. Rodriguez if (!request_wiphy) 16113f2355cbSLuis R. Rodriguez return false; 1612806a9e39SLuis R. Rodriguez 1613806a9e39SLuis R. Rodriguez if (likely(request_wiphy != wiphy)) 16143f2355cbSLuis R. Rodriguez return !country_ie_integrity_changes(country_ie_checksum); 1615fb1fc7adSLuis R. Rodriguez /* 1616fb1fc7adSLuis R. Rodriguez * We should not have let these through at this point, they 16173f2355cbSLuis R. Rodriguez * should have been picked up earlier by the first alpha2 check 1618fb1fc7adSLuis R. Rodriguez * on the device 1619fb1fc7adSLuis R. Rodriguez */ 16203f2355cbSLuis R. Rodriguez if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) 16213f2355cbSLuis R. Rodriguez return true; 16223f2355cbSLuis R. Rodriguez return false; 16233f2355cbSLuis R. Rodriguez } 16243f2355cbSLuis R. Rodriguez 16253f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 16263f2355cbSLuis R. Rodriguez u8 *country_ie, 16273f2355cbSLuis R. Rodriguez u8 country_ie_len) 16283f2355cbSLuis R. Rodriguez { 16293f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 16303f2355cbSLuis R. Rodriguez char alpha2[2]; 16313f2355cbSLuis R. Rodriguez u32 checksum = 0; 16323f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 1633fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 16343f2355cbSLuis R. Rodriguez 1635a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 16363f2355cbSLuis R. Rodriguez 1637d335fe63SLuis R. Rodriguez if (unlikely(!last_request)) { 1638d335fe63SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1639d335fe63SLuis R. Rodriguez return; 1640d335fe63SLuis R. Rodriguez } 1641d335fe63SLuis R. Rodriguez 16423f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 16433f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 16443f2355cbSLuis R. Rodriguez goto out; 16453f2355cbSLuis R. Rodriguez 16463f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 16473f2355cbSLuis R. Rodriguez goto out; 16483f2355cbSLuis R. Rodriguez 1649fb1fc7adSLuis R. Rodriguez /* 1650fb1fc7adSLuis R. Rodriguez * Pending country IE processing, this can happen after we 16513f2355cbSLuis R. Rodriguez * call CRDA and wait for a response if a beacon was received before 1652fb1fc7adSLuis R. Rodriguez * we were able to process the last regulatory_hint_11d() call 1653fb1fc7adSLuis R. Rodriguez */ 16543f2355cbSLuis R. Rodriguez if (country_ie_regdomain) 16553f2355cbSLuis R. Rodriguez goto out; 16563f2355cbSLuis R. Rodriguez 16573f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 16583f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 16593f2355cbSLuis R. Rodriguez 16603f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 16613f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 16623f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 16633f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 16643f2355cbSLuis R. Rodriguez 1665fb1fc7adSLuis R. Rodriguez /* 1666fb1fc7adSLuis R. Rodriguez * We will run this for *every* beacon processed for the BSSID, so 16673f2355cbSLuis R. Rodriguez * we optimize an early check to exit out early if we don't have to 1668fb1fc7adSLuis R. Rodriguez * do anything 1669fb1fc7adSLuis R. Rodriguez */ 1670cc0b6fe8SLuis R. Rodriguez if (likely(last_request->initiator == 1671cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE && 1672cc0b6fe8SLuis R. Rodriguez wiphy_idx_valid(last_request->wiphy_idx))) { 16733f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv_last_ie; 16743f2355cbSLuis R. Rodriguez 1675806a9e39SLuis R. Rodriguez drv_last_ie = 1676806a9e39SLuis R. Rodriguez cfg80211_drv_by_wiphy_idx(last_request->wiphy_idx); 16773f2355cbSLuis R. Rodriguez 1678fb1fc7adSLuis R. Rodriguez /* 1679fb1fc7adSLuis R. Rodriguez * Lets keep this simple -- we trust the first AP 1680fb1fc7adSLuis R. Rodriguez * after we intersect with CRDA 1681fb1fc7adSLuis R. Rodriguez */ 1682806a9e39SLuis R. Rodriguez if (likely(&drv_last_ie->wiphy == wiphy)) { 1683fb1fc7adSLuis R. Rodriguez /* 1684fb1fc7adSLuis R. Rodriguez * Ignore IEs coming in on this wiphy with 1685fb1fc7adSLuis R. Rodriguez * the same alpha2 and environment cap 1686fb1fc7adSLuis R. Rodriguez */ 16873f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 16883f2355cbSLuis R. Rodriguez alpha2) && 16893f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 16903f2355cbSLuis R. Rodriguez goto out; 16913f2355cbSLuis R. Rodriguez } 1692fb1fc7adSLuis R. Rodriguez /* 1693fb1fc7adSLuis R. Rodriguez * the wiphy moved on to another BSSID or the AP 16943f2355cbSLuis R. Rodriguez * was reconfigured. XXX: We need to deal with the 16953f2355cbSLuis R. Rodriguez * case where the user suspends and goes to goes 16963f2355cbSLuis R. Rodriguez * to another country, and then gets IEs from an 1697fb1fc7adSLuis R. Rodriguez * AP with different settings 1698fb1fc7adSLuis R. Rodriguez */ 16993f2355cbSLuis R. Rodriguez goto out; 17003f2355cbSLuis R. Rodriguez } else { 1701fb1fc7adSLuis R. Rodriguez /* 1702fb1fc7adSLuis R. Rodriguez * Ignore IEs coming in on two separate wiphys with 1703fb1fc7adSLuis R. Rodriguez * the same alpha2 and environment cap 1704fb1fc7adSLuis R. Rodriguez */ 17053f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 17063f2355cbSLuis R. Rodriguez alpha2) && 17073f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 17083f2355cbSLuis R. Rodriguez goto out; 17093f2355cbSLuis R. Rodriguez } 17103f2355cbSLuis R. Rodriguez /* We could potentially intersect though */ 17113f2355cbSLuis R. Rodriguez goto out; 17123f2355cbSLuis R. Rodriguez } 17133f2355cbSLuis R. Rodriguez } 17143f2355cbSLuis R. Rodriguez 17153f2355cbSLuis R. Rodriguez rd = country_ie_2_rd(country_ie, country_ie_len, &checksum); 17163f2355cbSLuis R. Rodriguez if (!rd) 17173f2355cbSLuis R. Rodriguez goto out; 17183f2355cbSLuis R. Rodriguez 1719915278e0SLuis R. Rodriguez /* 1720915278e0SLuis R. Rodriguez * This will not happen right now but we leave it here for the 17213f2355cbSLuis R. Rodriguez * the future when we want to add suspend/resume support and having 17223f2355cbSLuis R. Rodriguez * the user move to another country after doing so, or having the user 1723915278e0SLuis R. Rodriguez * move to another AP. Right now we just trust the first AP. 1724915278e0SLuis R. Rodriguez * 1725915278e0SLuis R. Rodriguez * If we hit this before we add this support we want to be informed of 1726915278e0SLuis R. Rodriguez * it as it would indicate a mistake in the current design 1727915278e0SLuis R. Rodriguez */ 1728915278e0SLuis R. Rodriguez if (WARN_ON(reg_same_country_ie_hint(wiphy, checksum))) 17290441d6ffSLuis R. Rodriguez goto free_rd_out; 17303f2355cbSLuis R. Rodriguez 1731fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1732fe33eb39SLuis R. Rodriguez if (!request) 1733fe33eb39SLuis R. Rodriguez goto free_rd_out; 1734fe33eb39SLuis R. Rodriguez 1735fb1fc7adSLuis R. Rodriguez /* 1736fb1fc7adSLuis R. Rodriguez * We keep this around for when CRDA comes back with a response so 1737fb1fc7adSLuis R. Rodriguez * we can intersect with that 1738fb1fc7adSLuis R. Rodriguez */ 17393f2355cbSLuis R. Rodriguez country_ie_regdomain = rd; 17403f2355cbSLuis R. Rodriguez 1741fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1742fe33eb39SLuis R. Rodriguez request->alpha2[0] = rd->alpha2[0]; 1743fe33eb39SLuis R. Rodriguez request->alpha2[1] = rd->alpha2[1]; 17447db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 1745fe33eb39SLuis R. Rodriguez request->country_ie_checksum = checksum; 1746fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 17473f2355cbSLuis R. Rodriguez 1748fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1749fe33eb39SLuis R. Rodriguez 1750fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1751fe33eb39SLuis R. Rodriguez 1752fe33eb39SLuis R. Rodriguez return; 17530441d6ffSLuis R. Rodriguez 17540441d6ffSLuis R. Rodriguez free_rd_out: 17550441d6ffSLuis R. Rodriguez kfree(rd); 17563f2355cbSLuis R. Rodriguez out: 1757a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 17583f2355cbSLuis R. Rodriguez } 17593f2355cbSLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint_11d); 1760b2e1b302SLuis R. Rodriguez 1761e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 1762e38f8a7aSLuis R. Rodriguez { 1763e38f8a7aSLuis R. Rodriguez if (freq == ieee80211_channel_to_frequency(12) || 1764e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(13) || 1765e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(14)) 1766e38f8a7aSLuis R. Rodriguez return true; 1767e38f8a7aSLuis R. Rodriguez return false; 1768e38f8a7aSLuis R. Rodriguez } 1769e38f8a7aSLuis R. Rodriguez 1770e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 1771e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 1772e38f8a7aSLuis R. Rodriguez gfp_t gfp) 1773e38f8a7aSLuis R. Rodriguez { 1774e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1775e38f8a7aSLuis R. Rodriguez 1776e38f8a7aSLuis R. Rodriguez if (likely((beacon_chan->beacon_found || 1777e38f8a7aSLuis R. Rodriguez (beacon_chan->flags & IEEE80211_CHAN_RADAR) || 1778e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 1779e38f8a7aSLuis R. Rodriguez !freq_is_chan_12_13_14(beacon_chan->center_freq))))) 1780e38f8a7aSLuis R. Rodriguez return 0; 1781e38f8a7aSLuis R. Rodriguez 1782e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 1783e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 1784e38f8a7aSLuis R. Rodriguez return -ENOMEM; 1785e38f8a7aSLuis R. Rodriguez 1786e38f8a7aSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 1787e38f8a7aSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Found new beacon on " 1788e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", 1789e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 1790e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 1791e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 1792e38f8a7aSLuis R. Rodriguez #endif 1793e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 1794e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 1795e38f8a7aSLuis R. Rodriguez 1796e38f8a7aSLuis R. Rodriguez 1797e38f8a7aSLuis R. Rodriguez /* 1798e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 1799e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 1800e38f8a7aSLuis R. Rodriguez */ 1801e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1802e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 1803e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1804e38f8a7aSLuis R. Rodriguez 1805e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 1806e38f8a7aSLuis R. Rodriguez 1807e38f8a7aSLuis R. Rodriguez return 0; 1808e38f8a7aSLuis R. Rodriguez } 1809e38f8a7aSLuis R. Rodriguez 1810a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1811b2e1b302SLuis R. Rodriguez { 1812b2e1b302SLuis R. Rodriguez unsigned int i; 1813a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1814a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1815a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1816b2e1b302SLuis R. Rodriguez 1817b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), " 1818b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 1819b2e1b302SLuis R. Rodriguez 1820b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1821b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1822b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1823b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1824b2e1b302SLuis R. Rodriguez 1825fb1fc7adSLuis R. Rodriguez /* 1826fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 1827fb1fc7adSLuis R. Rodriguez * in certain regions 1828fb1fc7adSLuis R. Rodriguez */ 1829b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1830b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1831b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 1832b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1833b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1834b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1835b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1836b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1837b2e1b302SLuis R. Rodriguez else 1838b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1839b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 1840b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1841b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1842b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1843b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1844b2e1b302SLuis R. Rodriguez } 1845b2e1b302SLuis R. Rodriguez } 1846b2e1b302SLuis R. Rodriguez 1847a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 1848b2e1b302SLuis R. Rodriguez { 1849b2e1b302SLuis R. Rodriguez 18503f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 18513f2355cbSLuis R. Rodriguez 18527db90f4aSLuis R. Rodriguez if (last_request->initiator == 18537db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1854806a9e39SLuis R. Rodriguez struct cfg80211_registered_device *drv; 1855806a9e39SLuis R. Rodriguez drv = cfg80211_drv_by_wiphy_idx( 1856806a9e39SLuis R. Rodriguez last_request->wiphy_idx); 1857806a9e39SLuis R. Rodriguez if (drv) { 18583f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 18593f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 18603f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0], 18613f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1]); 18623f2355cbSLuis R. Rodriguez } else 18633f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 18643f2355cbSLuis R. Rodriguez "domain intersected: \n"); 18653f2355cbSLuis R. Rodriguez } else 18663f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 1867039498c6SLuis R. Rodriguez "domain intersected: \n"); 18683f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 1869b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 1870b2e1b302SLuis R. Rodriguez "domain updated:\n"); 1871b2e1b302SLuis R. Rodriguez else { 1872b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 1873b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1874b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 1875b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 1876b2e1b302SLuis R. Rodriguez else 1877b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1878b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 1879b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1880b2e1b302SLuis R. Rodriguez } 1881b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1882b2e1b302SLuis R. Rodriguez } 1883b2e1b302SLuis R. Rodriguez 18842df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 1885b2e1b302SLuis R. Rodriguez { 1886b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 1887b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1888b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1889b2e1b302SLuis R. Rodriguez } 1890b2e1b302SLuis R. Rodriguez 18913f2355cbSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 18923f2355cbSLuis R. Rodriguez static void reg_country_ie_process_debug( 18933f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 18943f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 18953f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 18963f2355cbSLuis R. Rodriguez { 18973f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Received country IE:\n"); 18983f2355cbSLuis R. Rodriguez print_regdomain_info(country_ie_regdomain); 18993f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); 19003f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 19013f2355cbSLuis R. Rodriguez if (intersected_rd) { 19023f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: We intersect both of these " 19033f2355cbSLuis R. Rodriguez "and get:\n"); 1904667ecd01SLuis R. Rodriguez print_regdomain_info(intersected_rd); 19053f2355cbSLuis R. Rodriguez return; 19063f2355cbSLuis R. Rodriguez } 19073f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); 19083f2355cbSLuis R. Rodriguez } 19093f2355cbSLuis R. Rodriguez #else 19103f2355cbSLuis R. Rodriguez static inline void reg_country_ie_process_debug( 19113f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 19123f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 19133f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 19143f2355cbSLuis R. Rodriguez { 19153f2355cbSLuis R. Rodriguez } 19163f2355cbSLuis R. Rodriguez #endif 19173f2355cbSLuis R. Rodriguez 1918d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 1919a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 1920b2e1b302SLuis R. Rodriguez { 19219c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 19223f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv = NULL; 1923806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1924b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 1925b2e1b302SLuis R. Rodriguez 1926b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 1927f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1928b2e1b302SLuis R. Rodriguez return -EINVAL; 1929b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 1930b2e1b302SLuis R. Rodriguez return 0; 1931b2e1b302SLuis R. Rodriguez } 1932b2e1b302SLuis R. Rodriguez 1933b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 1934b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 1935b2e1b302SLuis R. Rodriguez return -EINVAL; 1936b2e1b302SLuis R. Rodriguez 1937f6037d09SJohannes Berg if (!last_request) 1938b2e1b302SLuis R. Rodriguez return -EINVAL; 1939b2e1b302SLuis R. Rodriguez 1940fb1fc7adSLuis R. Rodriguez /* 1941fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 19423f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 1943fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 1944fb1fc7adSLuis R. Rodriguez */ 19457db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1946fb1fc7adSLuis R. Rodriguez /* 1947fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 1948fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 1949fb1fc7adSLuis R. Rodriguez */ 1950b2e1b302SLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 195169b1572bSLuis R. Rodriguez !regdom_changes(rd->alpha2)) 1952b2e1b302SLuis R. Rodriguez return -EINVAL; 19533f2355cbSLuis R. Rodriguez } 19543f2355cbSLuis R. Rodriguez 1955fb1fc7adSLuis R. Rodriguez /* 1956fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 1957b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 1958b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 1959fb1fc7adSLuis R. Rodriguez * internal EEPROM data 1960fb1fc7adSLuis R. Rodriguez */ 1961b2e1b302SLuis R. Rodriguez 1962f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1963b2e1b302SLuis R. Rodriguez return -EINVAL; 1964b2e1b302SLuis R. Rodriguez 1965b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 1966b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 1967b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 1968b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 1969b2e1b302SLuis R. Rodriguez return -EINVAL; 1970b2e1b302SLuis R. Rodriguez } 1971b2e1b302SLuis R. Rodriguez 1972806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1973806a9e39SLuis R. Rodriguez 1974b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 19753e0c3ff3SLuis R. Rodriguez int r; 19763e0c3ff3SLuis R. Rodriguez 19777db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { 19783e0c3ff3SLuis R. Rodriguez reset_regdomains(); 19793e0c3ff3SLuis R. Rodriguez cfg80211_regdomain = rd; 19803e0c3ff3SLuis R. Rodriguez return 0; 19813e0c3ff3SLuis R. Rodriguez } 19823e0c3ff3SLuis R. Rodriguez 1983fb1fc7adSLuis R. Rodriguez /* 1984fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 1985fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 1986fb1fc7adSLuis R. Rodriguez */ 19873e0c3ff3SLuis R. Rodriguez 1988806a9e39SLuis R. Rodriguez BUG_ON(request_wiphy->regd); 19893e0c3ff3SLuis R. Rodriguez 1990806a9e39SLuis R. Rodriguez r = reg_copy_regd(&request_wiphy->regd, rd); 19913e0c3ff3SLuis R. Rodriguez if (r) 19923e0c3ff3SLuis R. Rodriguez return r; 19933e0c3ff3SLuis R. Rodriguez 1994b8295acdSLuis R. Rodriguez reset_regdomains(); 1995b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 1996b8295acdSLuis R. Rodriguez return 0; 1997b8295acdSLuis R. Rodriguez } 1998b8295acdSLuis R. Rodriguez 1999b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 2000b8295acdSLuis R. Rodriguez 20017db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2002b8295acdSLuis R. Rodriguez 20039c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 20049c96477dSLuis R. Rodriguez if (!intersected_rd) 20059c96477dSLuis R. Rodriguez return -EINVAL; 2006b8295acdSLuis R. Rodriguez 2007fb1fc7adSLuis R. Rodriguez /* 2008fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 20093e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2010fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2011fb1fc7adSLuis R. Rodriguez */ 20127db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) 2013806a9e39SLuis R. Rodriguez request_wiphy->regd = rd; 20143e0c3ff3SLuis R. Rodriguez else 20159c96477dSLuis R. Rodriguez kfree(rd); 20163e0c3ff3SLuis R. Rodriguez 2017b8295acdSLuis R. Rodriguez rd = NULL; 2018b8295acdSLuis R. Rodriguez 2019b8295acdSLuis R. Rodriguez reset_regdomains(); 2020b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2021b8295acdSLuis R. Rodriguez 2022b8295acdSLuis R. Rodriguez return 0; 20239c96477dSLuis R. Rodriguez } 20249c96477dSLuis R. Rodriguez 20253f2355cbSLuis R. Rodriguez /* 20263f2355cbSLuis R. Rodriguez * Country IE requests are handled a bit differently, we intersect 20273f2355cbSLuis R. Rodriguez * the country IE rd with what CRDA believes that country should have 20283f2355cbSLuis R. Rodriguez */ 20293f2355cbSLuis R. Rodriguez 20303f2355cbSLuis R. Rodriguez BUG_ON(!country_ie_regdomain); 20313f2355cbSLuis R. Rodriguez 20323f2355cbSLuis R. Rodriguez if (rd != country_ie_regdomain) { 2033fb1fc7adSLuis R. Rodriguez /* 2034fb1fc7adSLuis R. Rodriguez * Intersect what CRDA returned and our what we 2035fb1fc7adSLuis R. Rodriguez * had built from the Country IE received 2036fb1fc7adSLuis R. Rodriguez */ 20373f2355cbSLuis R. Rodriguez 20383f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, country_ie_regdomain); 20393f2355cbSLuis R. Rodriguez 20403f2355cbSLuis R. Rodriguez reg_country_ie_process_debug(rd, country_ie_regdomain, 20413f2355cbSLuis R. Rodriguez intersected_rd); 20423f2355cbSLuis R. Rodriguez 20433f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 20443f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 20453f2355cbSLuis R. Rodriguez } else { 2046fb1fc7adSLuis R. Rodriguez /* 2047fb1fc7adSLuis R. Rodriguez * This would happen when CRDA was not present and 20483f2355cbSLuis R. Rodriguez * OLD_REGULATORY was enabled. We intersect our Country 2049fb1fc7adSLuis R. Rodriguez * IE rd and what was set on cfg80211 originally 2050fb1fc7adSLuis R. Rodriguez */ 20513f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 20523f2355cbSLuis R. Rodriguez } 20533f2355cbSLuis R. Rodriguez 20543f2355cbSLuis R. Rodriguez if (!intersected_rd) 20553f2355cbSLuis R. Rodriguez return -EINVAL; 20563f2355cbSLuis R. Rodriguez 2057806a9e39SLuis R. Rodriguez drv = wiphy_to_dev(request_wiphy); 20583f2355cbSLuis R. Rodriguez 20593f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0] = rd->alpha2[0]; 20603f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1] = rd->alpha2[1]; 20613f2355cbSLuis R. Rodriguez drv->env = last_request->country_ie_env; 20623f2355cbSLuis R. Rodriguez 20633f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 20643f2355cbSLuis R. Rodriguez 20653f2355cbSLuis R. Rodriguez kfree(rd); 20663f2355cbSLuis R. Rodriguez rd = NULL; 20673f2355cbSLuis R. Rodriguez 2068b8295acdSLuis R. Rodriguez reset_regdomains(); 20693f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2070b2e1b302SLuis R. Rodriguez 2071b2e1b302SLuis R. Rodriguez return 0; 2072b2e1b302SLuis R. Rodriguez } 2073b2e1b302SLuis R. Rodriguez 2074b2e1b302SLuis R. Rodriguez 2075fb1fc7adSLuis R. Rodriguez /* 2076fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2077b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2078fb1fc7adSLuis R. Rodriguez * kmalloc'd the rd structure. Caller must hold cfg80211_mutex 2079fb1fc7adSLuis R. Rodriguez */ 2080a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2081b2e1b302SLuis R. Rodriguez { 2082b2e1b302SLuis R. Rodriguez int r; 2083b2e1b302SLuis R. Rodriguez 2084761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2085761cf7ecSLuis R. Rodriguez 2086b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 2087b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 2088d2372b31SJohannes Berg if (r) { 2089d2372b31SJohannes Berg kfree(rd); 2090b2e1b302SLuis R. Rodriguez return r; 2091d2372b31SJohannes Berg } 2092b2e1b302SLuis R. Rodriguez 2093b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 2094a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 2095b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 2096b2e1b302SLuis R. Rodriguez 2097b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2098f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 2099b2e1b302SLuis R. Rodriguez 2100a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 2101b2e1b302SLuis R. Rodriguez 210273d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 210373d54c9eSLuis R. Rodriguez 2104b2e1b302SLuis R. Rodriguez return r; 2105b2e1b302SLuis R. Rodriguez } 2106b2e1b302SLuis R. Rodriguez 2107a1794390SLuis R. Rodriguez /* Caller must hold cfg80211_mutex */ 21083f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 21093f2355cbSLuis R. Rodriguez { 2110806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 2111806a9e39SLuis R. Rodriguez 2112761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2113761cf7ecSLuis R. Rodriguez 2114806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2115806a9e39SLuis R. Rodriguez 21163e0c3ff3SLuis R. Rodriguez kfree(wiphy->regd); 2117806a9e39SLuis R. Rodriguez if (!last_request || !request_wiphy) 21183f2355cbSLuis R. Rodriguez return; 2119806a9e39SLuis R. Rodriguez if (request_wiphy != wiphy) 21203f2355cbSLuis R. Rodriguez return; 2121806a9e39SLuis R. Rodriguez last_request->wiphy_idx = WIPHY_IDX_STALE; 21223f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 21233f2355cbSLuis R. Rodriguez } 21243f2355cbSLuis R. Rodriguez 2125b2e1b302SLuis R. Rodriguez int regulatory_init(void) 2126b2e1b302SLuis R. Rodriguez { 2127bcf4f99bSLuis R. Rodriguez int err = 0; 2128734366deSJohannes Berg 2129b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 2130b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 2131b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 2132734366deSJohannes Berg 2133fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 2134e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2135fe33eb39SLuis R. Rodriguez 2136734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 2137a3d2eaf0SJohannes Berg cfg80211_regdomain = static_regdom(ieee80211_regdom); 2138734366deSJohannes Berg 2139942b25cfSJohannes Berg printk(KERN_INFO "cfg80211: Using static regulatory domain info\n"); 2140734366deSJohannes Berg print_regdomain_info(cfg80211_regdomain); 2141fb1fc7adSLuis R. Rodriguez /* 2142fb1fc7adSLuis R. Rodriguez * The old code still requests for a new regdomain and if 2143734366deSJohannes Berg * you have CRDA you get it updated, otherwise you get 21442e097dc6SLuis R. Rodriguez * stuck with the static values. Since "EU" is not a valid 21452e097dc6SLuis R. Rodriguez * ISO / IEC 3166 alpha2 code we can't expect userpace to 21462e097dc6SLuis R. Rodriguez * give us a regulatory domain for it. We need last_request 21472e097dc6SLuis R. Rodriguez * iniitalized though so lets just send a request which we 21482e097dc6SLuis R. Rodriguez * know will be ignored... this crap will be removed once 21492e097dc6SLuis R. Rodriguez * OLD_REG dies. 2150fb1fc7adSLuis R. Rodriguez */ 2151ba25c141SLuis R. Rodriguez err = regulatory_hint_core(ieee80211_regdom); 2152734366deSJohannes Berg #else 2153a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 2154734366deSJohannes Berg 2155ba25c141SLuis R. Rodriguez err = regulatory_hint_core("00"); 2156734366deSJohannes Berg #endif 2157bcf4f99bSLuis R. Rodriguez if (err) { 2158bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2159bcf4f99bSLuis R. Rodriguez return err; 2160bcf4f99bSLuis R. Rodriguez /* 2161bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2162bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2163bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2164bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2165bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2166bcf4f99bSLuis R. Rodriguez */ 2167bcf4f99bSLuis R. Rodriguez printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " 2168bcf4f99bSLuis R. Rodriguez "to call CRDA during init"); 2169bcf4f99bSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 2170bcf4f99bSLuis R. Rodriguez /* We want to find out exactly why when debugging */ 2171bcf4f99bSLuis R. Rodriguez WARN_ON(err); 2172bcf4f99bSLuis R. Rodriguez #endif 2173bcf4f99bSLuis R. Rodriguez } 2174734366deSJohannes Berg 2175b2e1b302SLuis R. Rodriguez return 0; 2176b2e1b302SLuis R. Rodriguez } 2177b2e1b302SLuis R. Rodriguez 2178b2e1b302SLuis R. Rodriguez void regulatory_exit(void) 2179b2e1b302SLuis R. Rodriguez { 2180fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2181e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2182fe33eb39SLuis R. Rodriguez 2183fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2184fe33eb39SLuis R. Rodriguez 2185a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 2186734366deSJohannes Berg 2187b2e1b302SLuis R. Rodriguez reset_regdomains(); 2188734366deSJohannes Berg 21893f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 21903f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 21913f2355cbSLuis R. Rodriguez 2192f6037d09SJohannes Berg kfree(last_request); 2193f6037d09SJohannes Berg 2194b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2195734366deSJohannes Berg 2196e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2197e38f8a7aSLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 2198e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2199e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2200e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2201e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2202e38f8a7aSLuis R. Rodriguez } 2203e38f8a7aSLuis R. Rodriguez } 2204e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2205e38f8a7aSLuis R. Rodriguez 2206e38f8a7aSLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 2207e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2208e38f8a7aSLuis R. Rodriguez ®_beacon_list, list) { 2209e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2210e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2211e38f8a7aSLuis R. Rodriguez } 2212e38f8a7aSLuis R. Rodriguez } 2213e38f8a7aSLuis R. Rodriguez 2214fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2215fe33eb39SLuis R. Rodriguez if (!list_empty(®_requests_list)) { 2216fe33eb39SLuis R. Rodriguez list_for_each_entry_safe(reg_request, tmp, 2217fe33eb39SLuis R. Rodriguez ®_requests_list, list) { 2218fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2219fe33eb39SLuis R. Rodriguez kfree(reg_request); 2220fe33eb39SLuis R. Rodriguez } 2221fe33eb39SLuis R. Rodriguez } 2222fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2223fe33eb39SLuis R. Rodriguez 2224a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 22258318d78aSJohannes Berg } 2226