/* * Copyright 2002-2005, Instant802 Networks, Inc. * Copyright 2005-2006, Devicescape Software, Inc. * Copyright 2007 Johannes Berg * Copyright 2008 Luis R. Rodriguez * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ /** * DOC: Wireless regulatory infrastructure * * The usual implementation is for a driver to read a device EEPROM to * determine which regulatory domain it should be operating under, then * looking up the allowable channels in a driver-local table and finally * registering those channels in the wiphy structure. * * Another set of compliance enforcement is for drivers to use their * own compliance limits which can be stored on the EEPROM. The host * driver or firmware may ensure these are used. * * In addition to all this we provide an extra layer of regulatory * conformance. For drivers which do not have any regulatory * information CRDA provides the complete regulatory solution. * For others it provides a community effort on further restrictions * to enhance compliance. * * Note: When number of rules --> infinity we will not be able to * index on alpha2 any more, instead we'll probably have to * rely on some SHA1 checksum of the regdomain for example. * */ #include #include #include #include #include #include #include #include "core.h" #include "reg.h" /** * struct regulatory_request - receipt of last regulatory request * * @wiphy: this is set if this request's initiator is * %REGDOM_SET_BY_COUNTRY_IE or %REGDOM_SET_BY_DRIVER. This * can be used by the wireless core to deal with conflicts * and potentially inform users of which devices specifically * cased the conflicts. * @initiator: indicates who sent this request, could be any of * of those set in reg_set_by, %REGDOM_SET_BY_* * @alpha2: the ISO / IEC 3166 alpha2 country code of the requested * regulatory domain. We have a few special codes: * 00 - World regulatory domain * 99 - built by driver but a specific alpha2 cannot be determined * 98 - result of an intersection between two regulatory domains * @intersect: indicates whether the wireless core should intersect * the requested regulatory domain with the presently set regulatory * domain. */ struct regulatory_request { struct wiphy *wiphy; enum reg_set_by initiator; char alpha2[2]; bool intersect; }; /* Receipt of information from last regulatory request */ static struct regulatory_request *last_request; /* To trigger userspace events */ static struct platform_device *reg_pdev; /* Keep the ordering from large to small */ static u32 supported_bandwidths[] = { MHZ_TO_KHZ(40), MHZ_TO_KHZ(20), }; /* Central wireless core regulatory domains, we only need two, * the current one and a world regulatory domain in case we have no * information to give us an alpha2 */ static const struct ieee80211_regdomain *cfg80211_regdomain; /* We keep a static world regulatory domain in case of the absence of CRDA */ static const struct ieee80211_regdomain world_regdom = { .n_reg_rules = 1, .alpha2 = "00", .reg_rules = { REG_RULE(2412-10, 2462+10, 40, 6, 20, NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS), } }; static const struct ieee80211_regdomain *cfg80211_world_regdom = &world_regdom; #ifdef CONFIG_WIRELESS_OLD_REGULATORY static char *ieee80211_regdom = "US"; module_param(ieee80211_regdom, charp, 0444); MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); /* We assume 40 MHz bandwidth for the old regulatory work. * We make emphasis we are using the exact same frequencies * as before */ static const struct ieee80211_regdomain us_regdom = { .n_reg_rules = 6, .alpha2 = "US", .reg_rules = { /* IEEE 802.11b/g, channels 1..11 */ REG_RULE(2412-10, 2462+10, 40, 6, 27, 0), /* IEEE 802.11a, channel 36 */ REG_RULE(5180-10, 5180+10, 40, 6, 23, 0), /* IEEE 802.11a, channel 40 */ REG_RULE(5200-10, 5200+10, 40, 6, 23, 0), /* IEEE 802.11a, channel 44 */ REG_RULE(5220-10, 5220+10, 40, 6, 23, 0), /* IEEE 802.11a, channels 48..64 */ REG_RULE(5240-10, 5320+10, 40, 6, 23, 0), /* IEEE 802.11a, channels 149..165, outdoor */ REG_RULE(5745-10, 5825+10, 40, 6, 30, 0), } }; static const struct ieee80211_regdomain jp_regdom = { .n_reg_rules = 3, .alpha2 = "JP", .reg_rules = { /* IEEE 802.11b/g, channels 1..14 */ REG_RULE(2412-10, 2484+10, 40, 6, 20, 0), /* IEEE 802.11a, channels 34..48 */ REG_RULE(5170-10, 5240+10, 40, 6, 20, NL80211_RRF_PASSIVE_SCAN), /* IEEE 802.11a, channels 52..64 */ REG_RULE(5260-10, 5320+10, 40, 6, 20, NL80211_RRF_NO_IBSS | NL80211_RRF_DFS), } }; static const struct ieee80211_regdomain eu_regdom = { .n_reg_rules = 6, /* This alpha2 is bogus, we leave it here just for stupid * backward compatibility */ .alpha2 = "EU", .reg_rules = { /* IEEE 802.11b/g, channels 1..13 */ REG_RULE(2412-10, 2472+10, 40, 6, 20, 0), /* IEEE 802.11a, channel 36 */ REG_RULE(5180-10, 5180+10, 40, 6, 23, NL80211_RRF_PASSIVE_SCAN), /* IEEE 802.11a, channel 40 */ REG_RULE(5200-10, 5200+10, 40, 6, 23, NL80211_RRF_PASSIVE_SCAN), /* IEEE 802.11a, channel 44 */ REG_RULE(5220-10, 5220+10, 40, 6, 23, NL80211_RRF_PASSIVE_SCAN), /* IEEE 802.11a, channels 48..64 */ REG_RULE(5240-10, 5320+10, 40, 6, 20, NL80211_RRF_NO_IBSS | NL80211_RRF_DFS), /* IEEE 802.11a, channels 100..140 */ REG_RULE(5500-10, 5700+10, 40, 6, 30, NL80211_RRF_NO_IBSS | NL80211_RRF_DFS), } }; static const struct ieee80211_regdomain *static_regdom(char *alpha2) { if (alpha2[0] == 'U' && alpha2[1] == 'S') return &us_regdom; if (alpha2[0] == 'J' && alpha2[1] == 'P') return &jp_regdom; if (alpha2[0] == 'E' && alpha2[1] == 'U') return &eu_regdom; /* Default, as per the old rules */ return &us_regdom; } static bool is_old_static_regdom(const struct ieee80211_regdomain *rd) { if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom) return true; return false; } #else static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd) { return false; } #endif static void reset_regdomains(void) { /* avoid freeing static information or freeing something twice */ if (cfg80211_regdomain == cfg80211_world_regdom) cfg80211_regdomain = NULL; if (cfg80211_world_regdom == &world_regdom) cfg80211_world_regdom = NULL; if (cfg80211_regdomain == &world_regdom) cfg80211_regdomain = NULL; if (is_old_static_regdom(cfg80211_regdomain)) cfg80211_regdomain = NULL; kfree(cfg80211_regdomain); kfree(cfg80211_world_regdom); cfg80211_world_regdom = &world_regdom; cfg80211_regdomain = NULL; } /* Dynamic world regulatory domain requested by the wireless * core upon initialization */ static void update_world_regdomain(const struct ieee80211_regdomain *rd) { BUG_ON(!last_request); reset_regdomains(); cfg80211_world_regdom = rd; cfg80211_regdomain = rd; } bool is_world_regdom(const char *alpha2) { if (!alpha2) return false; if (alpha2[0] == '0' && alpha2[1] == '0') return true; return false; } static bool is_alpha2_set(const char *alpha2) { if (!alpha2) return false; if (alpha2[0] != 0 && alpha2[1] != 0) return true; return false; } static bool is_alpha_upper(char letter) { /* ASCII A - Z */ if (letter >= 65 && letter <= 90) return true; return false; } static bool is_unknown_alpha2(const char *alpha2) { if (!alpha2) return false; /* Special case where regulatory domain was built by driver * but a specific alpha2 cannot be determined */ if (alpha2[0] == '9' && alpha2[1] == '9') return true; return false; } static bool is_an_alpha2(const char *alpha2) { if (!alpha2) return false; if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) return true; return false; } static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) { if (!alpha2_x || !alpha2_y) return false; if (alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]) return true; return false; } static bool regdom_changed(const char *alpha2) { if (!cfg80211_regdomain) return true; if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) return false; return true; } /* This lets us keep regulatory code which is updated on a regulatory * basis in userspace. */ static int call_crda(const char *alpha2) { char country_env[9 + 2] = "COUNTRY="; char *envp[] = { country_env, NULL }; if (!is_world_regdom((char *) alpha2)) printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", alpha2[0], alpha2[1]); else printk(KERN_INFO "cfg80211: Calling CRDA to update world " "regulatory domain\n"); country_env[8] = alpha2[0]; country_env[9] = alpha2[1]; return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); } /* Used by nl80211 before kmalloc'ing our regulatory domain */ bool reg_is_valid_request(const char *alpha2) { if (!last_request) return false; return alpha2_equal(last_request->alpha2, alpha2); } /* Sanity check on a regulatory rule */ static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) { const struct ieee80211_freq_range *freq_range = &rule->freq_range; u32 freq_diff; if (freq_range->start_freq_khz == 0 || freq_range->end_freq_khz == 0) return false; if (freq_range->start_freq_khz > freq_range->end_freq_khz) return false; freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; if (freq_diff <= 0 || freq_range->max_bandwidth_khz > freq_diff) return false; return true; } static bool is_valid_rd(const struct ieee80211_regdomain *rd) { const struct ieee80211_reg_rule *reg_rule = NULL; unsigned int i; if (!rd->n_reg_rules) return false; for (i = 0; i < rd->n_reg_rules; i++) { reg_rule = &rd->reg_rules[i]; if (!is_valid_reg_rule(reg_rule)) return false; } return true; } /* Returns value in KHz */ static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range, u32 freq) { unsigned int i; for (i = 0; i < ARRAY_SIZE(supported_bandwidths); i++) { u32 start_freq_khz = freq - supported_bandwidths[i]/2; u32 end_freq_khz = freq + supported_bandwidths[i]/2; if (start_freq_khz >= freq_range->start_freq_khz && end_freq_khz <= freq_range->end_freq_khz) return supported_bandwidths[i]; } return 0; } /* Helper for regdom_intersect(), this does the real * mathematical intersection fun */ static int reg_rules_intersect( const struct ieee80211_reg_rule *rule1, const struct ieee80211_reg_rule *rule2, struct ieee80211_reg_rule *intersected_rule) { const struct ieee80211_freq_range *freq_range1, *freq_range2; struct ieee80211_freq_range *freq_range; const struct ieee80211_power_rule *power_rule1, *power_rule2; struct ieee80211_power_rule *power_rule; u32 freq_diff; freq_range1 = &rule1->freq_range; freq_range2 = &rule2->freq_range; freq_range = &intersected_rule->freq_range; power_rule1 = &rule1->power_rule; power_rule2 = &rule2->power_rule; power_rule = &intersected_rule->power_rule; freq_range->start_freq_khz = max(freq_range1->start_freq_khz, freq_range2->start_freq_khz); freq_range->end_freq_khz = min(freq_range1->end_freq_khz, freq_range2->end_freq_khz); freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, freq_range2->max_bandwidth_khz); freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; if (freq_range->max_bandwidth_khz > freq_diff) freq_range->max_bandwidth_khz = freq_diff; power_rule->max_eirp = min(power_rule1->max_eirp, power_rule2->max_eirp); power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, power_rule2->max_antenna_gain); intersected_rule->flags = (rule1->flags | rule2->flags); if (!is_valid_reg_rule(intersected_rule)) return -EINVAL; return 0; } /** * regdom_intersect - do the intersection between two regulatory domains * @rd1: first regulatory domain * @rd2: second regulatory domain * * Use this function to get the intersection between two regulatory domains. * Once completed we will mark the alpha2 for the rd as intersected, "98", * as no one single alpha2 can represent this regulatory domain. * * Returns a pointer to the regulatory domain structure which will hold the * resulting intersection of rules between rd1 and rd2. We will * kzalloc() this structure for you. */ static struct ieee80211_regdomain *regdom_intersect( const struct ieee80211_regdomain *rd1, const struct ieee80211_regdomain *rd2) { int r, size_of_regd; unsigned int x, y; unsigned int num_rules = 0, rule_idx = 0; const struct ieee80211_reg_rule *rule1, *rule2; struct ieee80211_reg_rule *intersected_rule; struct ieee80211_regdomain *rd; /* This is just a dummy holder to help us count */ struct ieee80211_reg_rule irule; /* Uses the stack temporarily for counter arithmetic */ intersected_rule = &irule; memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); if (!rd1 || !rd2) return NULL; /* First we get a count of the rules we'll need, then we actually * build them. This is to so we can malloc() and free() a * regdomain once. The reason we use reg_rules_intersect() here * is it will return -EINVAL if the rule computed makes no sense. * All rules that do check out OK are valid. */ for (x = 0; x < rd1->n_reg_rules; x++) { rule1 = &rd1->reg_rules[x]; for (y = 0; y < rd2->n_reg_rules; y++) { rule2 = &rd2->reg_rules[y]; if (!reg_rules_intersect(rule1, rule2, intersected_rule)) num_rules++; memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); } } if (!num_rules) return NULL; size_of_regd = sizeof(struct ieee80211_regdomain) + ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); rd = kzalloc(size_of_regd, GFP_KERNEL); if (!rd) return NULL; for (x = 0; x < rd1->n_reg_rules; x++) { rule1 = &rd1->reg_rules[x]; for (y = 0; y < rd2->n_reg_rules; y++) { rule2 = &rd2->reg_rules[y]; /* This time around instead of using the stack lets * write to the target rule directly saving ourselves * a memcpy() */ intersected_rule = &rd->reg_rules[rule_idx]; r = reg_rules_intersect(rule1, rule2, intersected_rule); /* No need to memset here the intersected rule here as * we're not using the stack anymore */ if (r) continue; rule_idx++; } } if (rule_idx != num_rules) { kfree(rd); return NULL; } rd->n_reg_rules = num_rules; rd->alpha2[0] = '9'; rd->alpha2[1] = '8'; return rd; } /* XXX: add support for the rest of enum nl80211_reg_rule_flags, we may * want to just have the channel structure use these */ static u32 map_regdom_flags(u32 rd_flags) { u32 channel_flags = 0; if (rd_flags & NL80211_RRF_PASSIVE_SCAN) channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; if (rd_flags & NL80211_RRF_NO_IBSS) channel_flags |= IEEE80211_CHAN_NO_IBSS; if (rd_flags & NL80211_RRF_DFS) channel_flags |= IEEE80211_CHAN_RADAR; return channel_flags; } /** * freq_reg_info - get regulatory information for the given frequency * @center_freq: Frequency in KHz for which we want regulatory information for * @bandwidth: the bandwidth requirement you have in KHz, if you do not have one * you can set this to 0. If this frequency is allowed we then set * this value to the maximum allowed bandwidth. * @reg_rule: the regulatory rule which we have for this frequency * * Use this function to get the regulatory rule for a specific frequency. */ static int freq_reg_info(u32 center_freq, u32 *bandwidth, const struct ieee80211_reg_rule **reg_rule) { int i; u32 max_bandwidth = 0; if (!cfg80211_regdomain) return -EINVAL; for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) { const struct ieee80211_reg_rule *rr; const struct ieee80211_freq_range *fr = NULL; const struct ieee80211_power_rule *pr = NULL; rr = &cfg80211_regdomain->reg_rules[i]; fr = &rr->freq_range; pr = &rr->power_rule; max_bandwidth = freq_max_bandwidth(fr, center_freq); if (max_bandwidth && *bandwidth <= max_bandwidth) { *reg_rule = rr; *bandwidth = max_bandwidth; break; } } return !max_bandwidth; } static void handle_channel(struct ieee80211_channel *chan) { int r; u32 flags = chan->orig_flags; u32 max_bandwidth = 0; const struct ieee80211_reg_rule *reg_rule = NULL; const struct ieee80211_power_rule *power_rule = NULL; r = freq_reg_info(MHZ_TO_KHZ(chan->center_freq), &max_bandwidth, ®_rule); if (r) { flags |= IEEE80211_CHAN_DISABLED; chan->flags = flags; return; } power_rule = ®_rule->power_rule; chan->flags = flags | map_regdom_flags(reg_rule->flags); chan->max_antenna_gain = min(chan->orig_mag, (int) MBI_TO_DBI(power_rule->max_antenna_gain)); chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); if (chan->orig_mpwr) chan->max_power = min(chan->orig_mpwr, (int) MBM_TO_DBM(power_rule->max_eirp)); else chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); } static void handle_band(struct ieee80211_supported_band *sband) { int i; for (i = 0; i < sband->n_channels; i++) handle_channel(&sband->channels[i]); } static void update_all_wiphy_regulatory(enum reg_set_by setby) { struct cfg80211_registered_device *drv; list_for_each_entry(drv, &cfg80211_drv_list, list) wiphy_update_regulatory(&drv->wiphy, setby); } void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby) { enum ieee80211_band band; for (band = 0; band < IEEE80211_NUM_BANDS; band++) { if (wiphy->bands[band]) handle_band(wiphy->bands[band]); if (wiphy->reg_notifier) wiphy->reg_notifier(wiphy, setby); } } /* Return value which can be used by ignore_request() to indicate * it has been determined we should intersect two regulatory domains */ #define REG_INTERSECT 1 /* This has the logic which determines when a new request * should be ignored. */ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by, const char *alpha2) { /* All initial requests are respected */ if (!last_request) return 0; switch (set_by) { case REGDOM_SET_BY_INIT: return -EINVAL; case REGDOM_SET_BY_CORE: /* * Always respect new wireless core hints, should only happen * when updating the world regulatory domain at init. */ return 0; case REGDOM_SET_BY_COUNTRY_IE: if (unlikely(!is_an_alpha2(alpha2))) return -EINVAL; if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) { if (last_request->wiphy != wiphy) { /* * Two cards with two APs claiming different * different Country IE alpha2s. We could * intersect them, but that seems unlikely * to be correct. Reject second one for now. */ if (!alpha2_equal(alpha2, cfg80211_regdomain->alpha2)) return -EOPNOTSUPP; return -EALREADY; } /* Two consecutive Country IE hints on the same wiphy */ if (!alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) return 0; return -EALREADY; } /* * Ignore Country IE hints for now, need to think about * what we need to do to support multi-domain operation. */ return -EOPNOTSUPP; case REGDOM_SET_BY_DRIVER: if (last_request->initiator == REGDOM_SET_BY_DRIVER) return -EALREADY; return 0; case REGDOM_SET_BY_USER: if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) return REG_INTERSECT; return 0; } return -EINVAL; } /* Caller must hold &cfg80211_drv_mutex */ int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by, const char *alpha2) { struct regulatory_request *request; bool intersect = false; int r = 0; r = ignore_request(wiphy, set_by, alpha2); if (r == REG_INTERSECT) intersect = true; else if (r) return r; switch (set_by) { case REGDOM_SET_BY_CORE: case REGDOM_SET_BY_COUNTRY_IE: case REGDOM_SET_BY_DRIVER: case REGDOM_SET_BY_USER: request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); if (!request) return -ENOMEM; request->alpha2[0] = alpha2[0]; request->alpha2[1] = alpha2[1]; request->initiator = set_by; request->wiphy = wiphy; request->intersect = intersect; kfree(last_request); last_request = request; r = call_crda(alpha2); #ifndef CONFIG_WIRELESS_OLD_REGULATORY if (r) printk(KERN_ERR "cfg80211: Failed calling CRDA\n"); #endif break; default: r = -ENOTSUPP; break; } return r; } void regulatory_hint(struct wiphy *wiphy, const char *alpha2) { BUG_ON(!alpha2); mutex_lock(&cfg80211_drv_mutex); __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2); mutex_unlock(&cfg80211_drv_mutex); } EXPORT_SYMBOL(regulatory_hint); static void print_rd_rules(const struct ieee80211_regdomain *rd) { unsigned int i; const struct ieee80211_reg_rule *reg_rule = NULL; const struct ieee80211_freq_range *freq_range = NULL; const struct ieee80211_power_rule *power_rule = NULL; printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), " "(max_antenna_gain, max_eirp)\n"); for (i = 0; i < rd->n_reg_rules; i++) { reg_rule = &rd->reg_rules[i]; freq_range = ®_rule->freq_range; power_rule = ®_rule->power_rule; /* There may not be documentation for max antenna gain * in certain regions */ if (power_rule->max_antenna_gain) printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " "(%d mBi, %d mBm)\n", freq_range->start_freq_khz, freq_range->end_freq_khz, freq_range->max_bandwidth_khz, power_rule->max_antenna_gain, power_rule->max_eirp); else printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " "(N/A, %d mBm)\n", freq_range->start_freq_khz, freq_range->end_freq_khz, freq_range->max_bandwidth_khz, power_rule->max_eirp); } } static void print_regdomain(const struct ieee80211_regdomain *rd) { if (is_world_regdom(rd->alpha2)) printk(KERN_INFO "cfg80211: World regulatory " "domain updated:\n"); else { if (is_unknown_alpha2(rd->alpha2)) printk(KERN_INFO "cfg80211: Regulatory domain " "changed to driver built-in settings " "(unknown country)\n"); else printk(KERN_INFO "cfg80211: Regulatory domain " "changed to country: %c%c\n", rd->alpha2[0], rd->alpha2[1]); } print_rd_rules(rd); } static void print_regdomain_info(const struct ieee80211_regdomain *rd) { printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); print_rd_rules(rd); } /* Takes ownership of rd only if it doesn't fail */ static int __set_regdom(const struct ieee80211_regdomain *rd) { const struct ieee80211_regdomain *intersected_rd = NULL; /* Some basic sanity checks first */ if (is_world_regdom(rd->alpha2)) { if (WARN_ON(!reg_is_valid_request(rd->alpha2))) return -EINVAL; update_world_regdomain(rd); return 0; } if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && !is_unknown_alpha2(rd->alpha2)) return -EINVAL; if (!last_request) return -EINVAL; /* allow overriding the static definitions if CRDA is present */ if (!is_old_static_regdom(cfg80211_regdomain) && !regdom_changed(rd->alpha2)) return -EINVAL; /* Now lets set the regulatory domain, update all driver channels * and finally inform them of what we have done, in case they want * to review or adjust their own settings based on their own * internal EEPROM data */ if (WARN_ON(!reg_is_valid_request(rd->alpha2))) return -EINVAL; reset_regdomains(); /* Country IE parsing coming soon */ switch (last_request->initiator) { case REGDOM_SET_BY_CORE: case REGDOM_SET_BY_DRIVER: case REGDOM_SET_BY_USER: if (!is_valid_rd(rd)) { printk(KERN_ERR "cfg80211: Invalid " "regulatory domain detected:\n"); print_regdomain_info(rd); return -EINVAL; } break; case REGDOM_SET_BY_COUNTRY_IE: /* Not yet */ WARN_ON(1); default: return -EOPNOTSUPP; } if (unlikely(last_request->intersect)) { intersected_rd = regdom_intersect(rd, cfg80211_regdomain); if (!intersected_rd) return -EINVAL; kfree(rd); rd = intersected_rd; } /* Tada! */ cfg80211_regdomain = rd; return 0; } /* Use this call to set the current regulatory domain. Conflicts with * multiple drivers can be ironed out later. Caller must've already * kmalloc'd the rd structure. Caller must hold cfg80211_drv_mutex */ int set_regdom(const struct ieee80211_regdomain *rd) { int r; /* Note that this doesn't update the wiphys, this is done below */ r = __set_regdom(rd); if (r) { kfree(rd); return r; } /* This would make this whole thing pointless */ BUG_ON(rd != cfg80211_regdomain); /* update all wiphys now with the new established regulatory domain */ update_all_wiphy_regulatory(last_request->initiator); print_regdomain(rd); return r; } int regulatory_init(void) { int err; reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); if (IS_ERR(reg_pdev)) return PTR_ERR(reg_pdev); #ifdef CONFIG_WIRELESS_OLD_REGULATORY cfg80211_regdomain = static_regdom(ieee80211_regdom); printk(KERN_INFO "cfg80211: Using static regulatory domain info\n"); print_regdomain_info(cfg80211_regdomain); /* The old code still requests for a new regdomain and if * you have CRDA you get it updated, otherwise you get * stuck with the static values. We ignore "EU" code as * that is not a valid ISO / IEC 3166 alpha2 */ if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U') err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, ieee80211_regdom); #else cfg80211_regdomain = cfg80211_world_regdom; err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00"); if (err) printk(KERN_ERR "cfg80211: calling CRDA failed - " "unable to update world regulatory domain, " "using static definition\n"); #endif return 0; } void regulatory_exit(void) { mutex_lock(&cfg80211_drv_mutex); reset_regdomains(); kfree(last_request); platform_device_unregister(reg_pdev); mutex_unlock(&cfg80211_drv_mutex); }