diff options
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/Kconfig | 32 | ||||
| -rw-r--r-- | net/wireless/core.c | 49 | ||||
| -rw-r--r-- | net/wireless/core.h | 2 | ||||
| -rw-r--r-- | net/wireless/nl80211.c | 280 | ||||
| -rw-r--r-- | net/wireless/reg.c | 910 | ||||
| -rw-r--r-- | net/wireless/reg.h | 13 |
6 files changed, 1146 insertions, 140 deletions
diff --git a/net/wireless/Kconfig b/net/wireless/Kconfig index 833b024f8f6..7d82be07fa1 100644 --- a/net/wireless/Kconfig +++ b/net/wireless/Kconfig @@ -14,6 +14,38 @@ config NL80211 If unsure, say Y. +config WIRELESS_OLD_REGULATORY + bool "Old wireless static regulatory definitions" + default n + ---help--- + This option enables the old static regulatory information + and uses it within the new framework. This is available + temporarily as an option to help prevent immediate issues + due to the switch to the new regulatory framework which + does require a new userspace application which has the + database of regulatory information (CRDA) and another for + setting regulatory domains (iw). + + For more information see: + + http://wireless.kernel.org/en/developers/Regulatory/CRDA + http://wireless.kernel.org/en/users/Documentation/iw + + It is important to note though that if you *do* have CRDA present + and if this option is enabled CRDA *will* be called to update the + regulatory domain (for US and JP only). Support for letting the user + set the regulatory domain through iw is also supported. This option + mainly exists to leave around for a kernel release some old static + regulatory domains that were defined and to keep around the old + ieee80211_regdom module parameter. This is being phased out and you + should stop using them ASAP. + + Say N unless you cannot install a new userspace application + or have one currently depending on the ieee80211_regdom module + parameter and cannot port it to use the new userspace interfaces. + + This is scheduled for removal for 2.6.29. + config WIRELESS_EXT bool "Wireless extensions" default n diff --git a/net/wireless/core.c b/net/wireless/core.c index f1da0b93bc5..5031db7b275 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -1,7 +1,7 @@ /* * This is the linux wireless configuration interface. * - * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net> + * Copyright 2006-2008 Johannes Berg <johannes@sipsolutions.net> */ #include <linux/if.h> @@ -19,6 +19,7 @@ #include "nl80211.h" #include "core.h" #include "sysfs.h" +#include "reg.h" /* name for sysfs, %d is appended */ #define PHY_NAME "phy" @@ -32,7 +33,6 @@ MODULE_DESCRIPTION("wireless configuration support"); * often because we need to do it for each command */ LIST_HEAD(cfg80211_drv_list); DEFINE_MUTEX(cfg80211_drv_mutex); -static int wiphy_counter; /* for debugfs */ static struct dentry *ieee80211_debugfs_dir; @@ -184,7 +184,8 @@ int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, if (result) goto out_unlock; - if (!debugfs_rename(rdev->wiphy.debugfsdir->d_parent, + if (rdev->wiphy.debugfsdir && + !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, rdev->wiphy.debugfsdir, rdev->wiphy.debugfsdir->d_parent, newname)) @@ -204,6 +205,8 @@ out_unlock: struct wiphy *wiphy_new(struct cfg80211_ops *ops, int sizeof_priv) { + static int wiphy_counter; + struct cfg80211_registered_device *drv; int alloc_size; @@ -220,21 +223,18 @@ struct wiphy *wiphy_new(struct cfg80211_ops *ops, int sizeof_priv) mutex_lock(&cfg80211_drv_mutex); - drv->idx = wiphy_counter; - - /* now increase counter for the next device unless - * it has wrapped previously */ - if (wiphy_counter >= 0) - wiphy_counter++; - - mutex_unlock(&cfg80211_drv_mutex); + drv->idx = wiphy_counter++; if (unlikely(drv->idx < 0)) { + wiphy_counter--; + mutex_unlock(&cfg80211_drv_mutex); /* ugh, wrapped! */ kfree(drv); return NULL; } + mutex_unlock(&cfg80211_drv_mutex); + /* give it a proper name */ snprintf(drv->wiphy.dev.bus_id, BUS_ID_SIZE, PHY_NAME "%d", drv->idx); @@ -259,6 +259,13 @@ int wiphy_register(struct wiphy *wiphy) struct ieee80211_supported_band *sband; bool have_band = false; int i; + u16 ifmodes = wiphy->interface_modes; + + /* sanity check ifmodes */ + WARN_ON(!ifmodes); + ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1; + if (WARN_ON(ifmodes != wiphy->interface_modes)) + wiphy->interface_modes = ifmodes; /* sanity check supported bands/channels */ for (band = 0; band < IEEE80211_NUM_BANDS; band++) { @@ -295,7 +302,9 @@ int wiphy_register(struct wiphy *wiphy) ieee80211_set_bitrate_flags(wiphy); /* set up regulatory info */ - wiphy_update_regulatory(wiphy); + mutex_lock(&cfg80211_reg_mutex); + wiphy_update_regulatory(wiphy, REGDOM_SET_BY_CORE); + mutex_unlock(&cfg80211_reg_mutex); mutex_lock(&cfg80211_drv_mutex); @@ -309,6 +318,8 @@ int wiphy_register(struct wiphy *wiphy) drv->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&drv->wiphy), ieee80211_debugfs_dir); + if (IS_ERR(drv->wiphy.debugfsdir)) + drv->wiphy.debugfsdir = NULL; res = 0; out_unlock: @@ -373,6 +384,8 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb, rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy); + WARN_ON(dev->ieee80211_ptr->iftype == NL80211_IFTYPE_UNSPECIFIED); + switch (state) { case NETDEV_REGISTER: mutex_lock(&rdev->devlist_mtx); @@ -404,7 +417,9 @@ static struct notifier_block cfg80211_netdev_notifier = { static int cfg80211_init(void) { - int err = wiphy_sysfs_init(); + int err; + + err = wiphy_sysfs_init(); if (err) goto out_fail_sysfs; @@ -418,8 +433,14 @@ static int cfg80211_init(void) ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); + err = regulatory_init(); + if (err) + goto out_fail_reg; + return 0; +out_fail_reg: + debugfs_remove(ieee80211_debugfs_dir); out_fail_nl80211: unregister_netdevice_notifier(&cfg80211_netdev_notifier); out_fail_notifier: @@ -427,6 +448,7 @@ out_fail_notifier: out_fail_sysfs: return err; } + subsys_initcall(cfg80211_init); static void cfg80211_exit(void) @@ -435,5 +457,6 @@ static void cfg80211_exit(void) nl80211_exit(); unregister_netdevice_notifier(&cfg80211_netdev_notifier); wiphy_sysfs_exit(); + regulatory_exit(); } module_exit(cfg80211_exit); diff --git a/net/wireless/core.h b/net/wireless/core.h index 7a02c356d63..771cc5cc765 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -79,6 +79,6 @@ extern int cfg80211_dev_rename(struct cfg80211_registered_device *drv, char *newname); void ieee80211_set_bitrate_flags(struct wiphy *wiphy); -void wiphy_update_regulatory(struct wiphy *wiphy); +void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby); #endif /* __NET_WIRELESS_CORE_H */ diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 59eb2cf42e5..572793c8c7a 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -18,6 +18,7 @@ #include <net/cfg80211.h> #include "core.h" #include "nl80211.h" +#include "reg.h" /* the netlink family */ static struct genl_family nl80211_fam = { @@ -87,6 +88,16 @@ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = { [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY, .len = IEEE80211_MAX_MESH_ID_LEN }, [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 }, + + [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 }, + [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED }, + + [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 }, + [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 }, + [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 }, + + [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY, + .len = NL80211_HT_CAPABILITY_LEN }, }; /* message building helper */ @@ -106,10 +117,12 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags, struct nlattr *nl_bands, *nl_band; struct nlattr *nl_freqs, *nl_freq; struct nlattr *nl_rates, *nl_rate; + struct nlattr *nl_modes; enum ieee80211_band band; struct ieee80211_channel *chan; struct ieee80211_rate *rate; int i; + u16 ifmodes = dev->wiphy.interface_modes; hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY); if (!hdr) @@ -118,6 +131,20 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags, NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->idx); NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)); + nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES); + if (!nl_modes) + goto nla_put_failure; + + i = 0; + while (ifmodes) { + if (ifmodes & 1) + NLA_PUT_FLAG(msg, i); + ifmodes >>= 1; + i++; + } + + nla_nest_end(msg, nl_modes); + nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS); if (!nl_bands) goto nla_put_failure; @@ -272,7 +299,7 @@ static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags, NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name); - /* TODO: interface type */ + NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype); return genlmsg_end(msg, hdr); nla_put_failure: @@ -391,40 +418,56 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info) int err, ifindex; enum nl80211_iftype type; struct net_device *dev; - u32 flags; + u32 _flags, *flags = NULL; memset(¶ms, 0, sizeof(params)); - if (info->attrs[NL80211_ATTR_IFTYPE]) { - type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]); - if (type > NL80211_IFTYPE_MAX) - return -EINVAL; - } else - return -EINVAL; - err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; ifindex = dev->ifindex; + type = dev->ieee80211_ptr->iftype; dev_put(dev); - if (!drv->ops->change_virtual_intf) { + err = -EINVAL; + if (info->attrs[NL80211_ATTR_IFTYPE]) { + type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]); + if (type > NL80211_IFTYPE_MAX) + goto unlock; + } + + if (!drv->ops->change_virtual_intf || + !(drv->wiphy.interface_modes & (1 << type))) { err = -EOPNOTSUPP; goto unlock; } - if (type == NL80211_IFTYPE_MESH_POINT && - info->attrs[NL80211_ATTR_MESH_ID]) { + if (info->attrs[NL80211_ATTR_MESH_ID]) { + if (type != NL80211_IFTYPE_MESH_POINT) { + err = -EINVAL; + goto unlock; + } params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]); params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]); } + if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) { + if (type != NL80211_IFTYPE_MONITOR) { + err = -EINVAL; + goto unlock; + } + err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS], + &_flags); + if (!err) + flags = &_flags; + } rtnl_lock(); - err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ? - info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL, - &flags); err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex, - type, err ? NULL : &flags, ¶ms); + type, flags, ¶ms); + + dev = __dev_get_by_index(&init_net, ifindex); + WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type)); + rtnl_unlock(); unlock: @@ -455,7 +498,8 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info) if (IS_ERR(drv)) return PTR_ERR(drv); - if (!drv->ops->add_virtual_intf) { + if (!drv->ops->add_virtual_intf || + !(drv->wiphy.interface_modes & (1 << type))) { err = -EOPNOTSUPP; goto unlock; } @@ -1125,6 +1169,10 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info) params.listen_interval = nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]); + if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) + params.ht_capa = + nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]); + if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS], ¶ms.station_flags)) return -EINVAL; @@ -1188,6 +1236,9 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) params.listen_interval = nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]); params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]); + if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) + params.ht_capa = + nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]); if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS], ¶ms.station_flags)) @@ -1525,6 +1576,183 @@ static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info) return err; } +static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info) +{ + struct cfg80211_registered_device *drv; + int err; + struct net_device *dev; + struct bss_parameters params; + + memset(¶ms, 0, sizeof(params)); + /* default to not changing parameters */ + params.use_cts_prot = -1; + params.use_short_preamble = -1; + params.use_short_slot_time = -1; + + if (info->attrs[NL80211_ATTR_BSS_CTS_PROT]) + params.use_cts_prot = + nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]); + if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]) + params.use_short_preamble = + nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]); + if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]) + params.use_short_slot_time = + nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]); + + err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); + if (err) + return err; + + if (!drv->ops->change_bss) { + err = -EOPNOTSUPP; + goto out; + } + + rtnl_lock(); + err = drv->ops->change_bss(&drv->wiphy, dev, ¶ms); + rtnl_unlock(); + + out: + cfg80211_put_dev(drv); + dev_put(dev); + return err; +} + +static const struct nla_policy + reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = { + [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 }, + [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 }, + [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 }, + [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 }, + [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 }, + [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 }, +}; + +static int parse_reg_rule(struct nlattr *tb[], + struct ieee80211_reg_rule *reg_rule) +{ + struct ieee80211_freq_range *freq_range = ®_rule->freq_range; + struct ieee80211_power_rule *power_rule = ®_rule->power_rule; + + if (!tb[NL80211_ATTR_REG_RULE_FLAGS]) + return -EINVAL; + if (!tb[NL80211_ATTR_FREQ_RANGE_START]) + return -EINVAL; + if (!tb[NL80211_ATTR_FREQ_RANGE_END]) + return -EINVAL; + if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]) + return -EINVAL; + if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]) + return -EINVAL; + + reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]); + + freq_range->start_freq_khz = + nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]); + freq_range->end_freq_khz = + nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]); + freq_range->max_bandwidth_khz = + nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]); + + power_rule->max_eirp = + nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]); + + if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]) + power_rule->max_antenna_gain = + nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]); + + return 0; +} + +static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info) +{ + int r; + char *data = NULL; + + if (!info->attrs[NL80211_ATTR_REG_ALPHA2]) + return -EINVAL; + + data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]); + +#ifdef CONFIG_WIRELESS_OLD_REGULATORY + /* We ignore world regdom requests with the old regdom setup */ + if (is_world_regdom(data)) + return -EINVAL; +#endif + mutex_lock(&cfg80211_drv_mutex); + r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data, NULL); + mutex_unlock(&cfg80211_drv_mutex); + return r; +} + +static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info) +{ + struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1]; + struct nlattr *nl_reg_rule; + char *alpha2 = NULL; + int rem_reg_rules = 0, r = 0; + u32 num_rules = 0, rule_idx = 0, size_of_regd; + struct ieee80211_regdomain *rd = NULL; + + if (!info->attrs[NL80211_ATTR_REG_ALPHA2]) + return -EINVAL; + + if (!info->attrs[NL80211_ATTR_REG_RULES]) + return -EINVAL; + + alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]); + + nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES], + rem_reg_rules) { + num_rules++; + if (num_rules > NL80211_MAX_SUPP_REG_RULES) + goto bad_reg; + } + + if (!reg_is_valid_request(alpha2)) + return -EINVAL; + + size_of_regd = sizeof(struct ieee80211_regdomain) + + (num_rules * sizeof(struct ieee80211_reg_rule)); + + rd = kzalloc(size_of_regd, GFP_KERNEL); + if (!rd) + return -ENOMEM; + + rd->n_reg_rules = num_rules; + rd->alpha2[0] = alpha2[0]; + rd->alpha2[1] = alpha2[1]; + + nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES], + rem_reg_rules) { + nla_parse(tb, NL80211_REG_RULE_ATTR_MAX, + nla_data(nl_reg_rule), nla_len(nl_reg_rule), + reg_rule_policy); + r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]); + if (r) + goto bad_reg; + + rule_idx++; + + if (rule_idx > NL80211_MAX_SUPP_REG_RULES) + goto bad_reg; + } + + BUG_ON(rule_idx != num_rules); + + mutex_lock(&cfg80211_drv_mutex); + r = set_regdom(rd); + mutex_unlock(&cfg80211_drv_mutex); + if (r) + goto bad_reg; + + return r; + +bad_reg: + kfree(rd); + return -EINVAL; +} + static struct genl_ops nl80211_ops[] = { { .cmd = NL80211_CMD_GET_WIPHY, @@ -1656,6 +1884,24 @@ static struct genl_ops nl80211_ops[] = { .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, + { + .cmd = NL80211_CMD_SET_BSS, + .doit = nl80211_set_bss, + .policy = nl80211_policy, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = NL80211_CMD_SET_REG, + .doit = nl80211_set_reg, + .policy = nl80211_policy, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = NL80211_CMD_REQ_SET_REG, + .doit = nl80211_req_set_reg, + .policy = nl80211_policy, + .flags = GENL_ADMIN_PERM, + }, }; /* multicast groups */ diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 855bff4b325..626dbb68849 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -2,179 +2,871 @@ * Copyright 2002-2005, Instant802 Networks, Inc. * Copyright 2005-2006, Devicescape Software, Inc. * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> + * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com> * * 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. */ -/* - * This regulatory domain control implementation is highly incomplete, it - * only exists for the purpose of not regressing mac80211. - * - * For now, drivers can restrict the set of allowed channels by either - * not registering those channels or setting the IEEE80211_CHAN_DISABLED - * flag; that flag will only be *set* by this code, never *cleared. +/** + * 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. * - * Alternatively, drivers that trust the regulatory domain control here - * will register a complete set of capabilities and the control code - * will restrict the set by setting the IEEE80211_CHAN_* flags. + * 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 <linux/kernel.h> +#include <linux/list.h> +#include <linux/random.h> +#include <linux/nl80211.h> +#include <linux/platform_device.h> #include <net/wireless.h> +#include <net/cfg80211.h> #include "core.h" +#include "reg.h" -static char *ieee80211_regdom = "US"; -module_param(ieee80211_regdom, charp, 0444); -MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); - -struct ieee80211_channel_range { - short start_freq; - short end_freq; - int max_power; - int max_antenna_gain; - u32 flags; +/* wiphy is set if this request's initiator is REGDOM_SET_BY_DRIVER */ +struct regulatory_request { + struct list_head list; + struct wiphy *wiphy; + int granted; + enum reg_set_by initiator; + char alpha2[2]; }; -struct ieee80211_regdomain { - const char *code; - const struct ieee80211_channel_range *ranges; - int n_ranges; +static LIST_HEAD(regulatory_requests); +DEFINE_MUTEX(cfg80211_reg_mutex); + +/* 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), }; -#define RANGE_PWR(_start, _end, _pwr, _ag, _flags) \ - { _start, _end, _pwr, _ag, _flags } +static struct list_head regulatory_requests; +/* 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; -/* - * Ideally, in the future, these definitions will be loaded from a - * userspace table via some daemon. - */ -static const struct ieee80211_channel_range ieee80211_US_channels[] = { - /* IEEE 802.11b/g, channels 1..11 */ - RANGE_PWR(2412, 2462, 27, 6, 0), - /* IEEE 802.11a, channel 36*/ - RANGE_PWR(5180, 5180, 23, 6, 0), - /* IEEE 802.11a, channel 40*/ - RANGE_PWR(5200, 5200, 23, 6, 0), - /* IEEE 802.11a, channel 44*/ - RANGE_PWR(5220, 5220, 23, 6, 0), - /* IEEE 802.11a, channels 48..64 */ - RANGE_PWR(5240, 5320, 23, 6, 0), - /* IEEE 802.11a, channels 149..165, outdoor */ - RANGE_PWR(5745, 5825, 30, 6, 0), +/* 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_channel_range ieee80211_JP_channels[] = { - /* IEEE 802.11b/g, channels 1..14 */ - RANGE_PWR(2412, 2484, 20, 6, 0), - /* IEEE 802.11a, channels 34..48 */ - RANGE_PWR(5170, 5240, 20, 6, IEEE80211_CHAN_PASSIVE_SCAN), - /* IEEE 802.11a, channels 52..64 */ - RANGE_PWR(5260, 5320, 20, 6, IEEE80211_CHAN_NO_IBSS | - IEEE80211_CHAN_RADAR), -}; +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_channel_range ieee80211_EU_channels[] = { - /* IEEE 802.11b/g, channels 1..13 */ - RANGE_PWR(2412, 2472, 20, 6, 0), - /* IEEE 802.11a, channel 36*/ - RANGE_PWR(5180, 5180, 23, 6, IEEE80211_CHAN_PASSIVE_SCAN), - /* IEEE 802.11a, channel 40*/ - RANGE_PWR(5200, 5200, 23, 6, IEEE80211_CHAN_PASSIVE_SCAN), - /* IEEE 802.11a, channel 44*/ - RANGE_PWR(5220, 5220, 23, 6, IEEE80211_CHAN_PASSIVE_SCAN), - /* IEEE 802.11a, channels 48..64 */ - RANGE_PWR(5240, 5320, 23, 6, IEEE80211_CHAN_NO_IBSS | - IEEE80211_CHAN_RADAR), - /* IEEE 802.11a, channels 100..140 */ - RANGE_PWR(5500, 5700, 30, 6, IEEE80211_CHAN_NO_IBSS | - IEEE80211_CHAN_RADAR), +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), + } }; -#define REGDOM(_code) \ - { \ - .code = __stringify(_code), \ - .ranges = ieee80211_ ##_code## _channels, \ - .n_ranges = ARRAY_SIZE(ieee80211_ ##_code## _channels), \ +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 ieee80211_regdoms[] = { - REGDOM(US), - REGDOM(JP), - REGDOM(EU), +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 const struct ieee80211_regdomain *get_regdom(void) +static void reset_regdomains(void) { - static const struct ieee80211_channel_range - ieee80211_world_channels[] = { - /* IEEE 802.11b/g, channels 1..11 */ - RANGE_PWR(2412, 2462, 27, 6, 0), + /* 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(list_empty(®ulatory_requests)); + + 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 }; - static const struct ieee80211_regdomain regdom_world = REGDOM(world); - int i; - for (i = 0; i < ARRAY_SIZE(ieee80211_regdoms); i++) - if (strcmp(ieee80211_regdom, ieee80211_regdoms[i].code) == 0) - return &ieee80211_regdoms[i]; + 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 ®dom_world; + return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); } +/* 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, + char *alpha2, struct ieee80211_regdomain *rd) +{ + struct regulatory_request *last_request = NULL; + + /* All initial requests are respected */ + if (list_empty(®ulatory_requests)) + return 0; + + last_request = list_first_entry(®ulatory_requests, + struct regulatory_request, list); -static void handle_channel(struct ieee80211_channel *chan, - const struct ieee80211_regdomain *rd) + switch (set_by) { + case REGDOM_SET_BY_INIT: + return -EINVAL; + case REGDOM_SET_BY_CORE: + /* Always respect new wireless core hints, should only + * come in for updating the world regulatory domain at init + * anyway */ + return 0; + case REGDOM_SET_BY_COUNTRY_IE: + if (last_request->initiator == set_by) { + if (last_request->wiphy != wiphy) { + /* Two cards with two APs claiming different + * different Country IE alpha2s! + * You're special!! */ + if (!alpha2_equal(last_request->alpha2, + cfg80211_regdomain->alpha2)) { + /* XXX: Deal with conflict, consider + * building a new one out of the + * intersection */ + WARN_ON(1); + return -EOPNOTSUPP; + } + return -EALREADY; + } + /* Two consecutive Country IE hints on the same wiphy */ + if (!alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) + return 0; + return -EALREADY; + } + if (WARN_ON(!is_alpha2_set(alpha2) || !is_an_alpha2(alpha2)), + "Invalid Country IE regulatory hint passed " + "to the wireless core\n") + return -EINVAL; + /* We ignore Country IE hints for now, as we haven't yet + * added the dot11MultiDomainCapabilityEnabled flag + * for wiphys */ + return 1; + case REGDOM_SET_BY_DRIVER: + BUG_ON(!wiphy); + if (last_request->initiator == set_by) { + /* Two separate drivers hinting different things, + * this is possible if you have two devices present + * on a system with different EEPROM regulatory + * readings. XXX: Do intersection, we support only + * the first regulatory hint for now */ + if (last_request->wiphy != wiphy) + return -EALREADY; + if (rd) + return -EALREADY; + /* Driver should not be trying to hint different + * regulatory domains! */ + BUG_ON(!alpha2_equal(alpha2, + cfg80211_regdomain->alpha2)); + return -EALREADY; + } + if (last_request->initiator == REGDOM_SET_BY_CORE) + return 0; + /* XXX: Handle intersection, and add the + * dot11MultiDomainCapabilityEnabled flag to wiphy. For now + * we assume the driver has this set to false, following the + * 802.11d dot11MultiDomainCapabilityEnabled documentation */ + if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) + return 0; + return 0; + case REGDOM_SET_BY_USER: + if (last_request->initiator == set_by || + last_request->initiator == REGDOM_SET_BY_CORE) + return 0; + /* Drivers can use their wiphy's reg_notifier() + * to override any information */ + if (last_request->initiator == REGDOM_SET_BY_DRIVER) + return 0; + /* XXX: Handle intersection */ + if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) + return -EOPNOTSUPP; + return 0; + default: + return -EINVAL; + } +} + +static bool __reg_is_valid_request(const char *alpha2, + struct regulatory_request **request) +{ + struct regulatory_request *req; + if (list_empty(®ulatory_requests)) + return false; + list_for_each_entry(req, ®ulatory_requests, list) { + if (alpha2_equal(req->alpha2, alpha2)) { + *request = req; + return true; + } + } + return false; +} + +/* Used by nl80211 before kmalloc'ing our regulatory domain */ +bool reg_is_valid_request(const char *alpha2) +{ + struct regulatory_request *request = NULL; + return __reg_is_valid_request(alpha2, &request); +} + +/* 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_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; +} + +/* 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 flags = chan->orig_flags; - const struct ieee80211_channel_range *rg = NULL; + u32 max_bandwidth = 0; - for (i = 0; i < rd->n_ranges; i++) { - if (rd->ranges[i].start_freq <= chan->center_freq && - chan->center_freq <= rd->ranges[i].end_freq) { - rg = &rd->ranges[i]; + 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; } } - if (!rg) { - /* not found */ + 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; } - chan->flags = flags; + power_rule = ®_rule->power_rule; + + chan->flags = flags | map_regdom_flags(reg_rule->flags); chan->max_antenna_gain = min(chan->orig_mag, - rg->max_antenna_gain); + (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, rg->max_power); + chan->max_power = min(chan->orig_mpwr, + (int) MBM_TO_DBM(power_rule->max_eirp)); else - chan->max_power = rg->max_power; + chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); } -static void handle_band(struct ieee80211_supported_band *sband, - const struct ieee80211_regdomain *rd) +static void handle_band(struct ieee80211_supported_band *sband) { int i; for (i = 0; i < sband->n_channels; i++) - handle_channel(&sband->channels[i], rd); + handle_channel(&sband->channels[i]); } -void wiphy_update_regulatory(struct wiphy *wiphy) +static void update_all_wiphy_regulatory(enum reg_set_by setby) { - enum ieee80211_band band; - const struct ieee80211_regdomain *rd = get_regdom(); + struct cfg80211_registered_device *drv; + + list_for_each_entry(drv, &cfg80211_drv_list, list) + wiphy_update_regulatory(&drv->wiphy, setby); +} - for (band = 0; band < IEEE80211_NUM_BANDS; band++) +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], rd); + handle_band(wiphy->bands[band]); + if (wiphy->reg_notifier) + wiphy->reg_notifier(wiphy, setby); + } +} + +/* Caller must hold &cfg80211_drv_mutex */ +int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by, + const char *alpha2, struct ieee80211_regdomain *rd) +{ + struct regulatory_request *request; + char *rd_alpha2; + int r = 0; + + r = ignore_request(wiphy, set_by, (char *) alpha2, rd); + if (r) + return r; + + if (rd) + rd_alpha2 = rd->alpha2; + else + rd_alpha2 = (char *) alpha2; + + 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] = rd_alpha2[0]; + request->alpha2[1] = rd_alpha2[1]; + request->initiator = set_by; + request->wiphy = wiphy; + + list_add_tail(&request->list, ®ulatory_requests); + if (rd) + break; + 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; +} + +/* If rd is not NULL and if this call fails the caller must free it */ +int regulatory_hint(struct wiphy *wiphy, const char *alpha2, + struct ieee80211_regdomain *rd) +{ + int r; + BUG_ON(!rd && !alpha2); + + mutex_lock(&cfg80211_drv_mutex); + + r = __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2, rd); + if (r || !rd) + goto unlock_and_exit; + + /* If the driver passed a regulatory domain we skipped asking + * userspace for one so we can now go ahead and set it */ + r = set_regdom(rd); + +unlock_and_exit: + mutex_unlock(&cfg80211_drv_mutex); + return r; +} +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); +} + +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); +} + +static int __set_regdom(const struct ieee80211_regdomain *rd) +{ + struct regulatory_request *request = NULL; + + /* Some basic sanity checks first */ + + if (is_world_regdom(rd->alpha2)) { + if (WARN_ON(!__reg_is_valid_request(rd->alpha2, &request))) + 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 (list_empty(®ulatory_requests)) + 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, &request))) + return -EINVAL; + + reset_regdomains(); + + /* Country IE parsing coming soon */ + switch (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; + } + + /* Tada! */ + cfg80211_regdomain = rd; + request->granted = 1; + + 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. If this calls fails you should kfree() + * the passed rd. Caller must hold cfg80211_drv_mutex */ +int set_regdom(const struct ieee80211_regdomain *rd) +{ + struct regulatory_request *this_request = NULL, *prev_request = NULL; + int r; + + if (!list_empty(®ulatory_requests)) + prev_request = list_first_entry(®ulatory_requests, + struct regulatory_request, list); + + /* Note that this doesn't update the wiphys, this is done below */ + r = __set_regdom(rd); + if (r) + return r; + + BUG_ON((!__reg_is_valid_request(rd->alpha2, &this_request))); + + /* The initial standard core update of the world regulatory domain, no + * need to keep that request info around if it didn't fail. */ + if (is_world_regdom(rd->alpha2) && + this_request->initiator == REGDOM_SET_BY_CORE && + this_request->granted) { + list_del(&this_request->list); + kfree(this_request); + this_request = NULL; + } + + /* Remove old requests, we only leave behind the last one */ + if (prev_request) { + list_del(&prev_request->list); + kfree(prev_request); + prev_request = NULL; + } + + /* 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(this_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, NULL); +#else + cfg80211_regdomain = cfg80211_world_regdom; + + err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", NULL); + 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) +{ + struct regulatory_request *req, *req_tmp; + + mutex_lock(&cfg80211_drv_mutex); + + reset_regdomains(); + + list_for_each_entry_safe(req, req_tmp, ®ulatory_requests, list) { + list_del(&req->list); + kfree(req); + } + platform_device_unregister(reg_pdev); + + mutex_unlock(&cfg80211_drv_mutex); } diff --git a/net/wireless/reg.h b/net/wireless/reg.h new file mode 100644 index 00000000000..a33362872f3 --- /dev/null +++ b/net/wireless/reg.h @@ -0,0 +1,13 @@ +#ifndef __NET_WIRELESS_REG_H +#define __NET_WIRELESS_REG_H + +extern struct mutex cfg80211_reg_mutex; +bool is_world_regdom(const char *alpha2); +bool reg_is_valid_request(const char *alpha2); + +int regulatory_init(void); +void regulatory_exit(void); + +int set_regdom(const struct ieee80211_regdomain *rd); + +#endif /* __NET_WIRELESS_REG_H */ |