From 3e0c3ff36c4c7b9e39af7d600e399664ca04e817 Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Wed, 7 Jan 2009 17:43:34 -0800 Subject: cfg80211: allow multiple driver regulatory_hints() We add support for multiple drivers to provide a regulatory_hint() on a system by adding a wiphy specific regulatory domain cache. This allows drivers to keep around cache their own regulatory domain structure queried from CRDA. We handle conflicts by intersecting multiple regulatory domains, each driver will stick to its own regulatory domain though unless a country IE has been received and processed. If the user already requested a regulatory domain and a driver requests the same regulatory domain then simply copy to the driver's regd the same regulatory domain and do not call CRDA, do not collect $200. Signed-off-by: Luis R. Rodriguez Acked-by: Johannes Berg Signed-off-by: John W. Linville --- include/net/wireless.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/net/wireless.h') diff --git a/include/net/wireless.h b/include/net/wireless.h index 21c5d966142d..9e73aae40c5d 100644 --- a/include/net/wireless.h +++ b/include/net/wireless.h @@ -187,6 +187,10 @@ struct ieee80211_supported_band { * we will disregard the first regulatory hint (when the * initiator is %REGDOM_SET_BY_CORE). * @reg_notifier: the driver's regulatory notification callback + * @regd: the driver's regulatory domain, if one was requested via + * the regulatory_hint() API. This can be used by the driver + * on the reg_notifier() if it chooses to ignore future + * regulatory domain changes caused by other drivers. */ struct wiphy { /* assign these fields before you register the wiphy */ @@ -213,6 +217,8 @@ struct wiphy { /* fields below are read-only, assigned by cfg80211 */ + const struct ieee80211_regdomain *regd; + /* the item in /sys/class/ieee80211/ points to this, * you need use set_wiphy_dev() (see below) */ struct device dev; -- cgit v1.2.3-59-g8ed1b From 881d948c23442173a011f1adcfe4c95bf7f27515 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 21 Jan 2009 15:13:48 +0100 Subject: wireless: restrict to 32 legacy rates Since the standards only define 12 legacy rates, 32 is certainly a sane upper limit and we don't need to use u64 everywhere. Add sanity checking that no more than 32 rates are registered and change the variables to u32 throughout. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- drivers/net/wireless/b43/main.c | 2 +- drivers/net/wireless/b43legacy/main.c | 2 +- drivers/net/wireless/p54/p54.h | 2 +- drivers/net/wireless/rt2x00/rt2x00.h | 2 +- include/net/mac80211.h | 4 ++-- include/net/wireless.h | 2 +- net/mac80211/ieee80211_i.h | 6 +++--- net/mac80211/mesh.c | 2 +- net/mac80211/mesh.h | 2 +- net/mac80211/mesh_plink.c | 6 +++--- net/mac80211/mlme.c | 16 ++++++++-------- net/mac80211/util.c | 4 ++-- net/wireless/core.c | 12 +++++++++--- net/wireless/util.c | 2 +- 14 files changed, 35 insertions(+), 29 deletions(-) (limited to 'include/net/wireless.h') diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c index 8bb6659c0b3f..675a73a98072 100644 --- a/drivers/net/wireless/b43/main.c +++ b/drivers/net/wireless/b43/main.c @@ -3398,7 +3398,7 @@ out_unlock_mutex: return err; } -static void b43_update_basic_rates(struct b43_wldev *dev, u64 brates) +static void b43_update_basic_rates(struct b43_wldev *dev, u32 brates) { struct ieee80211_supported_band *sband = dev->wl->hw->wiphy->bands[b43_current_band(dev->wl)]; diff --git a/drivers/net/wireless/b43legacy/main.c b/drivers/net/wireless/b43legacy/main.c index fb996c27a19b..879edc786713 100644 --- a/drivers/net/wireless/b43legacy/main.c +++ b/drivers/net/wireless/b43legacy/main.c @@ -2650,7 +2650,7 @@ out_unlock_mutex: return err; } -static void b43legacy_update_basic_rates(struct b43legacy_wldev *dev, u64 brates) +static void b43legacy_update_basic_rates(struct b43legacy_wldev *dev, u32 brates) { struct ieee80211_supported_band *sband = dev->wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ]; diff --git a/drivers/net/wireless/p54/p54.h b/drivers/net/wireless/p54/p54.h index 64492feca9b2..94c3acd1fcaf 100644 --- a/drivers/net/wireless/p54/p54.h +++ b/drivers/net/wireless/p54/p54.h @@ -144,7 +144,7 @@ struct p54_common { unsigned int output_power; u32 tsf_low32; u32 tsf_high32; - u64 basic_rate_mask; + u32 basic_rate_mask; u16 wakeup_timer; u16 aid; struct ieee80211_tx_queue_stats tx_stats[8]; diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h index cc56637e73b5..46918deceda1 100644 --- a/drivers/net/wireless/rt2x00/rt2x00.h +++ b/drivers/net/wireless/rt2x00/rt2x00.h @@ -396,7 +396,7 @@ struct rt2x00lib_erp { int ack_timeout; int ack_consume_time; - u64 basic_rates; + u32 basic_rates; int slot_time; diff --git a/include/net/mac80211.h b/include/net/mac80211.h index ef42559694f1..c76484009baa 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -207,7 +207,7 @@ struct ieee80211_bss_conf { u16 beacon_int; u16 assoc_capability; u64 timestamp; - u64 basic_rates; + u32 basic_rates; struct ieee80211_bss_ht_conf ht; }; @@ -761,7 +761,7 @@ enum set_key_cmd { * sizeof(void *), size is determined in hw information. */ struct ieee80211_sta { - u64 supp_rates[IEEE80211_NUM_BANDS]; + u32 supp_rates[IEEE80211_NUM_BANDS]; u8 addr[ETH_ALEN]; u16 aid; struct ieee80211_sta_ht_cap ht_cap; diff --git a/include/net/wireless.h b/include/net/wireless.h index 9e73aae40c5d..6c5b08204232 100644 --- a/include/net/wireless.h +++ b/include/net/wireless.h @@ -367,7 +367,7 @@ ieee80211_get_channel(struct wiphy *wiphy, int freq) */ struct ieee80211_rate * ieee80211_get_response_rate(struct ieee80211_supported_band *sband, - u64 basic_rates, int bitrate); + u32 basic_rates, int bitrate); /** * regulatory_hint - driver hint to the wireless core a regulatory domain diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index a8c72742a8b1..70366efc792e 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -909,11 +909,11 @@ int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid); void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata, struct ieee80211_if_sta *ifsta); struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, - u8 *bssid, u8 *addr, u64 supp_rates); + u8 *bssid, u8 *addr, u32 supp_rates); int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason); int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason); u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata); -u64 ieee80211_sta_get_rates(struct ieee80211_local *local, +u32 ieee80211_sta_get_rates(struct ieee80211_local *local, struct ieee802_11_elems *elems, enum ieee80211_band band); void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, @@ -1026,7 +1026,7 @@ void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, void ieee802_11_parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems); int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq); -u64 ieee80211_mandatory_rates(struct ieee80211_local *local, +u32 ieee80211_mandatory_rates(struct ieee80211_local *local, enum ieee80211_band band); void ieee80211_dynamic_ps_enable_work(struct work_struct *work); diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c index 82f568e94365..2d573f8470d0 100644 --- a/net/mac80211/mesh.c +++ b/net/mac80211/mesh.c @@ -476,7 +476,7 @@ static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, struct ieee80211_local *local = sdata->local; struct ieee802_11_elems elems; struct ieee80211_channel *channel; - u64 supp_rates = 0; + u32 supp_rates = 0; size_t baselen; int freq; enum ieee80211_band band = rx_status->band; diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h index f1196f5c3efe..9e064ee98ee0 100644 --- a/net/mac80211/mesh.h +++ b/net/mac80211/mesh.h @@ -236,7 +236,7 @@ void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len); int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata); /* Mesh plinks */ -void mesh_neighbour_update(u8 *hw_addr, u64 rates, +void mesh_neighbour_update(u8 *hw_addr, u32 rates, struct ieee80211_sub_if_data *sdata, bool add); bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie); void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata); diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c index c140a1b71a5e..a8bbdeca013a 100644 --- a/net/mac80211/mesh_plink.c +++ b/net/mac80211/mesh_plink.c @@ -93,7 +93,7 @@ static inline void mesh_plink_fsm_restart(struct sta_info *sta) * on it in the lifecycle management section! */ static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata, - u8 *hw_addr, u64 rates) + u8 *hw_addr, u32 rates) { struct ieee80211_local *local = sdata->local; struct sta_info *sta; @@ -222,7 +222,7 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, return 0; } -void mesh_neighbour_update(u8 *hw_addr, u64 rates, struct ieee80211_sub_if_data *sdata, +void mesh_neighbour_update(u8 *hw_addr, u32 rates, struct ieee80211_sub_if_data *sdata, bool peer_accepting_plinks) { struct ieee80211_local *local = sdata->local; @@ -447,7 +447,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m spin_lock_bh(&sta->lock); } else if (!sta) { /* ftype == PLINK_OPEN */ - u64 rates; + u32 rates; if (!mesh_plink_free_count(sdata)) { mpl_dbg("Mesh plink error: no more free plinks\n"); rcu_read_unlock(); diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index b9e4b93089c4..9852da54f5e7 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -73,7 +73,7 @@ static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie) static int ieee80211_compatible_rates(struct ieee80211_bss *bss, struct ieee80211_supported_band *sband, - u64 *rates) + u32 *rates) { int i, j, count; *rates = 0; @@ -93,14 +93,14 @@ static int ieee80211_compatible_rates(struct ieee80211_bss *bss, } /* also used by mesh code */ -u64 ieee80211_sta_get_rates(struct ieee80211_local *local, +u32 ieee80211_sta_get_rates(struct ieee80211_local *local, struct ieee802_11_elems *elems, enum ieee80211_band band) { struct ieee80211_supported_band *sband; struct ieee80211_rate *bitrates; size_t num_rates; - u64 supp_rates; + u32 supp_rates; int i, j; sband = local->hw.wiphy->bands[band]; @@ -253,7 +253,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, struct ieee80211_bss *bss; int wmm = 0; struct ieee80211_supported_band *sband; - u64 rates = 0; + u32 rates = 0; size_t e_ies_len; if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { @@ -1282,7 +1282,7 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, struct ieee80211_local *local = sdata->local; struct ieee80211_supported_band *sband; struct sta_info *sta; - u64 rates, basic_rates; + u32 rates, basic_rates; u16 capab_info, status_code, aid; struct ieee802_11_elems elems; struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; @@ -1639,7 +1639,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, struct sta_info *sta; struct ieee80211_channel *channel; u64 beacon_timestamp, rx_timestamp; - u64 supp_rates = 0; + u32 supp_rates = 0; enum ieee80211_band band = rx_status->band; if (elems->ds_params && elems->ds_params_len == 1) @@ -1660,7 +1660,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, sta = sta_info_get(local, mgmt->sa); if (sta) { - u64 prev_rates; + u32 prev_rates; prev_rates = sta->sta.supp_rates[band]; /* make sure mandatory rates are always added */ @@ -2526,7 +2526,7 @@ void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) * must be callable in atomic context. */ struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, - u8 *bssid,u8 *addr, u64 supp_rates) + u8 *bssid,u8 *addr, u32 supp_rates) { struct ieee80211_local *local = sdata->local; struct sta_info *sta; diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 3f559e3d0a7c..ede96c4fea2e 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -731,12 +731,12 @@ int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz) return ret; } -u64 ieee80211_mandatory_rates(struct ieee80211_local *local, +u32 ieee80211_mandatory_rates(struct ieee80211_local *local, enum ieee80211_band band) { struct ieee80211_supported_band *sband; struct ieee80211_rate *bitrates; - u64 mandatory_rates; + u32 mandatory_rates; enum ieee80211_rate_flags mandatory_flag; int i; diff --git a/net/wireless/core.c b/net/wireless/core.c index b96fc0c3f1c4..125226476089 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -273,10 +273,16 @@ int wiphy_register(struct wiphy *wiphy) sband->band = band; - if (!sband->n_channels || !sband->n_bitrates) { - WARN_ON(1); + if (WARN_ON(!sband->n_channels || !sband->n_bitrates)) + return -EINVAL; + + /* + * Since we use a u32 for rate bitmaps in + * ieee80211_get_response_rate, we cannot + * have more than 32 legacy rates. + */ + if (WARN_ON(sband->n_bitrates > 32)) return -EINVAL; - } for (i = 0; i < sband->n_channels; i++) { sband->channels[i].orig_flags = diff --git a/net/wireless/util.c b/net/wireless/util.c index e76cc28b0345..487cdd9bcffc 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -9,7 +9,7 @@ struct ieee80211_rate * ieee80211_get_response_rate(struct ieee80211_supported_band *sband, - u64 basic_rates, int bitrate) + u32 basic_rates, int bitrate) { struct ieee80211_rate *result = &sband->bitrates[0]; int i; -- cgit v1.2.3-59-g8ed1b From 1fa25e413659f943dfec65da2abe713d566c7fdf Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Thu, 22 Jan 2009 15:05:44 -0800 Subject: cfg80211: add wiphy_apply_custom_regulatory() This adds wiphy_apply_custom_regulatory() to be used by drivers prior to wiphy registration to apply a custom regulatory domain. This can be used by drivers that do not have a direct 1-1 mapping between a regulatory domain and a country. Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- include/net/wireless.h | 17 ++++++++ net/wireless/reg.c | 115 ++++++++++++++++++++++++++++++++++++++----------- 2 files changed, 108 insertions(+), 24 deletions(-) (limited to 'include/net/wireless.h') diff --git a/include/net/wireless.h b/include/net/wireless.h index 6c5b08204232..c5538b923afb 100644 --- a/include/net/wireless.h +++ b/include/net/wireless.h @@ -401,4 +401,21 @@ extern void regulatory_hint(struct wiphy *wiphy, const char *alpha2); extern void regulatory_hint_11d(struct wiphy *wiphy, u8 *country_ie, u8 country_ie_len); + +/** + * wiphy_apply_custom_regulatory - apply a custom driver regulatory domain + * @wiphy: the wireless device we want to process the regulatory domain on + * @regd: the custom regulatory domain to use for this wiphy + * + * Drivers can sometimes have custom regulatory domains which do not apply + * to a specific country. Drivers can use this to apply such custom regulatory + * domains. This routine must be called prior to wiphy registration. The + * custom regulatory domain will be trusted completely and as such previous + * default channel settings will be disregarded. If no rule is found for a + * channel on the regulatory domain the channel will be disabled. + */ +extern void wiphy_apply_custom_regulatory( + struct wiphy *wiphy, + const struct ieee80211_regdomain *regd); + #endif /* __NET_WIRELESS_H */ diff --git a/net/wireless/reg.c b/net/wireless/reg.c index b34fd84b3e2f..0d6059502b40 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -782,36 +782,18 @@ static u32 map_regdom_flags(u32 rd_flags) return channel_flags; } -/** - * freq_reg_info - get regulatory information for the given frequency - * @wiphy: the wiphy for which we want to process this rule for - * @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 on - * a given wireless device. If the device has a specific regulatory domain - * it wants to follow we respect that unless a country IE has been received - * and processed already. - * - * Returns 0 if it was able to find a valid regulatory rule which does - * apply to the given center_freq otherwise it returns non-zero. It will - * also return -ERANGE if we determine the given center_freq does not even have - * a regulatory rule for a frequency range in the center_freq's band. See - * freq_in_rule_band() for our current definition of a band -- this is purely - * subjective and right now its 802.11 specific. - */ -static int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth, - const struct ieee80211_reg_rule **reg_rule) +static int freq_reg_info_regd(struct wiphy *wiphy, + u32 center_freq, + u32 *bandwidth, + const struct ieee80211_reg_rule **reg_rule, + const struct ieee80211_regdomain *custom_regd) { int i; bool band_rule_found = false; const struct ieee80211_regdomain *regd; u32 max_bandwidth = 0; - regd = cfg80211_regdomain; + regd = custom_regd ? custom_regd : cfg80211_regdomain; /* Follow the driver's regulatory domain, if present, unless a country * IE has been processed */ @@ -852,6 +834,34 @@ static int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth, return !max_bandwidth; } +/** + * freq_reg_info - get regulatory information for the given frequency + * @wiphy: the wiphy for which we want to process this rule for + * @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 on + * a given wireless device. If the device has a specific regulatory domain + * it wants to follow we respect that unless a country IE has been received + * and processed already. + * + * Returns 0 if it was able to find a valid regulatory rule which does + * apply to the given center_freq otherwise it returns non-zero. It will + * also return -ERANGE if we determine the given center_freq does not even have + * a regulatory rule for a frequency range in the center_freq's band. See + * freq_in_rule_band() for our current definition of a band -- this is purely + * subjective and right now its 802.11 specific. + */ +static int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth, + const struct ieee80211_reg_rule **reg_rule) +{ + return freq_reg_info_regd(wiphy, center_freq, + bandwidth, reg_rule, NULL); +} + static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, unsigned int chan_idx) { @@ -962,6 +972,63 @@ void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby) wiphy->reg_notifier(wiphy, setby); } +static void handle_channel_custom(struct wiphy *wiphy, + enum ieee80211_band band, + unsigned int chan_idx, + const struct ieee80211_regdomain *regd) +{ + int r; + u32 max_bandwidth = 0; + const struct ieee80211_reg_rule *reg_rule = NULL; + const struct ieee80211_power_rule *power_rule = NULL; + struct ieee80211_supported_band *sband; + struct ieee80211_channel *chan; + + sband = wiphy->bands[band]; + BUG_ON(chan_idx >= sband->n_channels); + chan = &sband->channels[chan_idx]; + + r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), + &max_bandwidth, ®_rule, regd); + + if (r) { + chan->flags = IEEE80211_CHAN_DISABLED; + return; + } + + power_rule = ®_rule->power_rule; + + chan->flags |= map_regdom_flags(reg_rule->flags); + chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); + chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); + chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); +} + +static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, + const struct ieee80211_regdomain *regd) +{ + unsigned int i; + struct ieee80211_supported_band *sband; + + BUG_ON(!wiphy->bands[band]); + sband = wiphy->bands[band]; + + for (i = 0; i < sband->n_channels; i++) + handle_channel_custom(wiphy, band, i, regd); +} + +/* Used by drivers prior to wiphy registration */ +void wiphy_apply_custom_regulatory(struct wiphy *wiphy, + const struct ieee80211_regdomain *regd) +{ + enum ieee80211_band band; + for (band = 0; band < IEEE80211_NUM_BANDS; band++) { + if (wiphy->bands[band]) + handle_band_custom(wiphy, band, regd); + } +} +EXPORT_SYMBOL(wiphy_apply_custom_regulatory); + static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, const struct ieee80211_regdomain *src_regd) { -- cgit v1.2.3-59-g8ed1b From 34f573473a659f8c2727d8d408e17b241900c28e Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Thu, 22 Jan 2009 15:05:45 -0800 Subject: cfg80211: export freq_reg_info() This can be used by drivers on the reg_notifier() Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- include/net/wireless.h | 24 ++++++++++++++++++++++++ net/wireless/reg.c | 24 ++---------------------- 2 files changed, 26 insertions(+), 22 deletions(-) (limited to 'include/net/wireless.h') diff --git a/include/net/wireless.h b/include/net/wireless.h index c5538b923afb..f68602eb4160 100644 --- a/include/net/wireless.h +++ b/include/net/wireless.h @@ -418,4 +418,28 @@ extern void wiphy_apply_custom_regulatory( struct wiphy *wiphy, const struct ieee80211_regdomain *regd); +/** + * freq_reg_info - get regulatory information for the given frequency + * @wiphy: the wiphy for which we want to process this rule for + * @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 on + * a given wireless device. If the device has a specific regulatory domain + * it wants to follow we respect that unless a country IE has been received + * and processed already. + * + * Returns 0 if it was able to find a valid regulatory rule which does + * apply to the given center_freq otherwise it returns non-zero. It will + * also return -ERANGE if we determine the given center_freq does not even have + * a regulatory rule for a frequency range in the center_freq's band. See + * freq_in_rule_band() for our current definition of a band -- this is purely + * subjective and right now its 802.11 specific. + */ +extern int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth, + const struct ieee80211_reg_rule **reg_rule); + #endif /* __NET_WIRELESS_H */ diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 0d6059502b40..d663795d6944 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -833,29 +833,9 @@ static int freq_reg_info_regd(struct wiphy *wiphy, return !max_bandwidth; } +EXPORT_SYMBOL(freq_reg_info); -/** - * freq_reg_info - get regulatory information for the given frequency - * @wiphy: the wiphy for which we want to process this rule for - * @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 on - * a given wireless device. If the device has a specific regulatory domain - * it wants to follow we respect that unless a country IE has been received - * and processed already. - * - * Returns 0 if it was able to find a valid regulatory rule which does - * apply to the given center_freq otherwise it returns non-zero. It will - * also return -ERANGE if we determine the given center_freq does not even have - * a regulatory rule for a frequency range in the center_freq's band. See - * freq_in_rule_band() for our current definition of a band -- this is purely - * subjective and right now its 802.11 specific. - */ -static int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth, +int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth, const struct ieee80211_reg_rule **reg_rule) { return freq_reg_info_regd(wiphy, center_freq, -- cgit v1.2.3-59-g8ed1b From 2a44f911d8bac3e6c97a25cc612e4324dfbdfdc4 Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Thu, 22 Jan 2009 15:05:49 -0800 Subject: cfg80211: rename fw_handles_regulatory to custom_regulatory Drivers without firmware can also have custom regulatory maps which do not map to a specific ISO / IEC alpha2 country code. Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- drivers/net/wireless/iwlwifi/iwl-core.c | 2 +- drivers/net/wireless/iwlwifi/iwl3945-base.c | 2 +- include/net/wireless.h | 6 +++--- net/wireless/reg.c | 2 +- 4 files changed, 6 insertions(+), 6 deletions(-) (limited to 'include/net/wireless.h') diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c index f24d3b40e8e4..9f284ebb6c28 100644 --- a/drivers/net/wireless/iwlwifi/iwl-core.c +++ b/drivers/net/wireless/iwlwifi/iwl-core.c @@ -811,7 +811,7 @@ int iwl_setup_mac(struct iwl_priv *priv) BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC); - hw->wiphy->fw_handles_regulatory = true; + hw->wiphy->custom_regulatory = true; /* Default value; 4 EDCA QOS priorities */ hw->queues = 4; diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c index d520bfe2db99..de8c8d7ca0fe 100644 --- a/drivers/net/wireless/iwlwifi/iwl3945-base.c +++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c @@ -7011,7 +7011,7 @@ static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *e BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC); - hw->wiphy->fw_handles_regulatory = true; + hw->wiphy->custom_regulatory = true; /* 4 EDCA QOS priorities */ hw->queues = 4; diff --git a/include/net/wireless.h b/include/net/wireless.h index f68602eb4160..c3f6e462ec2d 100644 --- a/include/net/wireless.h +++ b/include/net/wireless.h @@ -181,8 +181,8 @@ struct ieee80211_supported_band { * struct wiphy - wireless hardware description * @idx: the wiphy index assigned to this item * @class_dev: the class device representing /sys/class/ieee80211/ - * @fw_handles_regulatory: tells us the firmware for this device - * has its own regulatory solution and cannot identify the + * @custom_regulatory: tells us the driver for this device + * has its own custom regulatory domain and cannot identify the * ISO / IEC 3166 alpha2 it belongs to. When this is enabled * we will disregard the first regulatory hint (when the * initiator is %REGDOM_SET_BY_CORE). @@ -201,7 +201,7 @@ struct wiphy { /* Supported interface modes, OR together BIT(NL80211_IFTYPE_...) */ u16 interface_modes; - bool fw_handles_regulatory; + bool custom_regulatory; /* If multiple wiphys are registered and you're handed e.g. * a regular netdev with assigned ieee80211_ptr, you won't diff --git a/net/wireless/reg.c b/net/wireless/reg.c index c201abd38ad1..5db02a3d9c02 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -927,7 +927,7 @@ static bool ignore_reg_update(struct wiphy *wiphy, enum reg_set_by setby) if (!last_request) return true; if (setby == REGDOM_SET_BY_CORE && - wiphy->fw_handles_regulatory) + wiphy->custom_regulatory) return true; return false; } -- cgit v1.2.3-59-g8ed1b From 716f9392e2b84cacc18cc11f7427cb98adeb1c3d Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Thu, 22 Jan 2009 15:05:51 -0800 Subject: cfg80211: pass more detailed regulatory request information on reg_notifier() Drivers may need more information than just who set the last regulatory domain, as such lets just pass the last regulatory_request receipt. To do this we need to move out to headers struct regulatory_request, and enum environment_cap. While at it lets add documentation for enum environment_cap. Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- include/net/cfg80211.h | 45 +++++++++++++++++++++++++++++++++++++++++++++ include/net/wireless.h | 3 ++- net/wireless/reg.c | 34 +--------------------------------- net/wireless/reg.h | 7 ------- 4 files changed, 48 insertions(+), 41 deletions(-) (limited to 'include/net/wireless.h') diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index f19c3e163663..dd1fd51638fc 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -357,6 +357,51 @@ enum reg_set_by { REGDOM_SET_BY_COUNTRY_IE, }; +/** + * enum environment_cap - Environment parsed from country IE + * @ENVIRON_ANY: indicates country IE applies to both indoor and + * outdoor operation. + * @ENVIRON_INDOOR: indicates country IE applies only to indoor operation + * @ENVIRON_OUTDOOR: indicates country IE applies only to outdoor operation + */ +enum environment_cap { + ENVIRON_ANY, + ENVIRON_INDOOR, + ENVIRON_OUTDOOR, +}; + +/** + * 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. + * @country_ie_checksum: checksum of the last processed and accepted + * country IE + * @country_ie_env: lets us know if the AP is telling us we are outdoor, + * indoor, or if it doesn't matter + */ +struct regulatory_request { + struct wiphy *wiphy; + enum reg_set_by initiator; + char alpha2[2]; + bool intersect; + u32 country_ie_checksum; + enum environment_cap country_ie_env; +}; + struct ieee80211_freq_range { u32 start_freq_khz; u32 end_freq_khz; diff --git a/include/net/wireless.h b/include/net/wireless.h index c3f6e462ec2d..9c19764a4849 100644 --- a/include/net/wireless.h +++ b/include/net/wireless.h @@ -213,7 +213,8 @@ struct wiphy { struct ieee80211_supported_band *bands[IEEE80211_NUM_BANDS]; /* Lets us get back the wiphy on the callback */ - int (*reg_notifier)(struct wiphy *wiphy, enum reg_set_by setby); + int (*reg_notifier)(struct wiphy *wiphy, + struct regulatory_request *request); /* fields below are read-only, assigned by cfg80211 */ diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 81acb07f1d44..cad4daadba0d 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -42,38 +42,6 @@ #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. - * @country_ie_checksum: checksum of the last processed and accepted - * country IE - * @country_ie_env: lets us know if the AP is telling us we are outdoor, - * indoor, or if it doesn't matter - */ -struct regulatory_request { - struct wiphy *wiphy; - enum reg_set_by initiator; - char alpha2[2]; - bool intersect; - u32 country_ie_checksum; - enum environment_cap country_ie_env; -}; - /* Receipt of information from last regulatory request */ static struct regulatory_request *last_request; @@ -951,7 +919,7 @@ void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby) handle_band(wiphy, band); } if (wiphy->reg_notifier) - wiphy->reg_notifier(wiphy, setby); + wiphy->reg_notifier(wiphy, last_request); } static void handle_channel_custom(struct wiphy *wiphy, diff --git a/net/wireless/reg.h b/net/wireless/reg.h index a76ea3ff7cd6..eb1dd5bc9b27 100644 --- a/net/wireless/reg.h +++ b/net/wireless/reg.h @@ -11,13 +11,6 @@ void regulatory_exit(void); int set_regdom(const struct ieee80211_regdomain *rd); -enum environment_cap { - ENVIRON_ANY, - ENVIRON_INDOOR, - ENVIRON_OUTDOOR, -}; - - /** * __regulatory_hint - hint to the wireless core a regulatory domain * @wiphy: if the hint comes from country information from an AP, this -- cgit v1.2.3-59-g8ed1b From f976376de0d6a9697fb635369f12ae00251f4566 Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Thu, 22 Jan 2009 15:05:52 -0800 Subject: cfg80211: Allow for strict regulatory settings This allows drivers to request strict regulatory settings to be applied to its devices. This is desirable for devices where proper calibration and compliance can only be gauranteed for for the device's programmed regulatory domain. Regulatory domain settings will be ignored until the device's own regulatory domain is properly configured. If no regulatory domain is received only the world regulatory domain will be applied -- if OLD_REG (default to "US") is not enabled. If OLD_REG behaviour is not acceptable to drivers they must update their wiphy with a custom reuglatory prior to wiphy registration. Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- include/net/wireless.h | 10 ++++++++++ net/wireless/reg.c | 28 +++++++++++++++++++++++++++- 2 files changed, 37 insertions(+), 1 deletion(-) (limited to 'include/net/wireless.h') diff --git a/include/net/wireless.h b/include/net/wireless.h index 9c19764a4849..a42c1562d52b 100644 --- a/include/net/wireless.h +++ b/include/net/wireless.h @@ -186,6 +186,15 @@ struct ieee80211_supported_band { * ISO / IEC 3166 alpha2 it belongs to. When this is enabled * we will disregard the first regulatory hint (when the * initiator is %REGDOM_SET_BY_CORE). + * @strict_regulatory: tells us the driver for this device will ignore + * regulatory domain settings until it gets its own regulatory domain + * via its regulatory_hint(). After its gets its own regulatory domain + * it will only allow further regulatory domain settings to further + * enhance compliance. For example if channel 13 and 14 are disabled + * by this regulatory domain no user regulatory domain can enable these + * channels at a later time. This can be used for devices which do not + * have calibration information gauranteed for frequencies or settings + * outside of its regulatory domain. * @reg_notifier: the driver's regulatory notification callback * @regd: the driver's regulatory domain, if one was requested via * the regulatory_hint() API. This can be used by the driver @@ -202,6 +211,7 @@ struct wiphy { u16 interface_modes; bool custom_regulatory; + bool strict_regulatory; /* If multiple wiphys are registered and you're handed e.g. * a regular netdev with assigned ieee80211_ptr, you won't diff --git a/net/wireless/reg.c b/net/wireless/reg.c index cad4daadba0d..89e0d8b3cf1e 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -867,6 +867,22 @@ static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, power_rule = ®_rule->power_rule; + if (last_request->initiator == REGDOM_SET_BY_DRIVER && + last_request->wiphy && last_request->wiphy == wiphy && + last_request->wiphy->strict_regulatory) { + /* This gaurantees the driver's requested regulatory domain + * will always be used as a base for further regulatory + * settings */ + chan->flags = chan->orig_flags = + map_regdom_flags(reg_rule->flags); + chan->max_antenna_gain = chan->orig_mag = + (int) MBI_TO_DBI(power_rule->max_antenna_gain); + chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth); + chan->max_power = chan->orig_mpwr = + (int) MBM_TO_DBM(power_rule->max_eirp); + return; + } + 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)); @@ -897,6 +913,11 @@ static bool ignore_reg_update(struct wiphy *wiphy, enum reg_set_by setby) if (setby == REGDOM_SET_BY_CORE && wiphy->custom_regulatory) return true; + /* wiphy->regd will be set once the device has its own + * desired regulatory domain set */ + if (wiphy->strict_regulatory && !wiphy->regd && + !is_world_regdom(last_request->alpha2)) + return true; return false; } @@ -1155,10 +1176,15 @@ new_request: void regulatory_hint(struct wiphy *wiphy, const char *alpha2) { + int r; BUG_ON(!alpha2); mutex_lock(&cfg80211_drv_mutex); - __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2, 0, ENVIRON_ANY); + r = __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, + alpha2, 0, ENVIRON_ANY); + /* This is required so that the orig_* parameters are saved */ + if (r == -EALREADY && wiphy->strict_regulatory) + wiphy_update_regulatory(wiphy, REGDOM_SET_BY_DRIVER); mutex_unlock(&cfg80211_drv_mutex); } EXPORT_SYMBOL(regulatory_hint); -- cgit v1.2.3-59-g8ed1b From 2a5193119269062608582418deba7af82844159a Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 10 Feb 2009 21:25:55 +0100 Subject: cfg80211/nl80211: scanning (and mac80211 update to use it) This patch adds basic scan capability to cfg80211/nl80211 and changes mac80211 to use it. The BSS list that cfg80211 maintains is made driver-accessible with a private area in each BSS struct, but mac80211 doesn't yet use it. That's another large project. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- drivers/net/wireless/iwlwifi/iwl-agn.c | 12 +- drivers/net/wireless/iwlwifi/iwl-core.c | 1 + drivers/net/wireless/iwlwifi/iwl-scan.c | 2 +- drivers/net/wireless/iwlwifi/iwl3945-base.c | 17 +- include/linux/nl80211.h | 65 +++ include/net/cfg80211.h | 131 +++++ include/net/mac80211.h | 6 +- include/net/wireless.h | 3 + net/mac80211/cfg.c | 20 + net/mac80211/ieee80211_i.h | 18 +- net/mac80211/iface.c | 2 +- net/mac80211/main.c | 32 +- net/mac80211/mlme.c | 37 +- net/mac80211/scan.c | 356 +++--------- net/mac80211/wext.c | 59 +- net/wireless/Makefile | 2 +- net/wireless/core.c | 8 + net/wireless/core.h | 20 + net/wireless/nl80211.c | 323 +++++++++++ net/wireless/nl80211.h | 8 + net/wireless/scan.c | 807 ++++++++++++++++++++++++++++ 21 files changed, 1546 insertions(+), 383 deletions(-) create mode 100644 net/wireless/scan.c (limited to 'include/net/wireless.h') diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c index c196abc6db7a..539960da7e13 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn.c @@ -2678,11 +2678,19 @@ static void iwl_bss_info_changed(struct ieee80211_hw *hw, } -static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t ssid_len) +static int iwl_mac_hw_scan(struct ieee80211_hw *hw, + struct cfg80211_scan_request *req) { unsigned long flags; struct iwl_priv *priv = hw->priv; int ret; + u8 *ssid = NULL; + size_t ssid_len = 0; + + if (req->n_ssids) { + ssid = req->ssids[0].ssid; + ssid_len = req->ssids[0].ssid_len; + } IWL_DEBUG_MAC80211(priv, "enter\n"); @@ -2718,7 +2726,7 @@ static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t ssid_len) if (ssid_len) { priv->one_direct_scan = 1; - priv->direct_ssid_len = min_t(u8, ssid_len, IW_ESSID_MAX_SIZE); + priv->direct_ssid_len = ssid_len; memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len); } else { priv->one_direct_scan = 0; diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c index e18c3f326f71..260bf903cb71 100644 --- a/drivers/net/wireless/iwlwifi/iwl-core.c +++ b/drivers/net/wireless/iwlwifi/iwl-core.c @@ -1271,6 +1271,7 @@ int iwl_setup_mac(struct iwl_priv *priv) BIT(NL80211_IFTYPE_ADHOC); hw->wiphy->custom_regulatory = true; + hw->wiphy->max_scan_ssids = 1; /* Default value; 4 EDCA QOS priorities */ hw->queues = 4; diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c index 22bad3ce7d6a..1ec2b20eb37c 100644 --- a/drivers/net/wireless/iwlwifi/iwl-scan.c +++ b/drivers/net/wireless/iwlwifi/iwl-scan.c @@ -860,7 +860,7 @@ void iwl_bg_scan_completed(struct work_struct *work) if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; - ieee80211_scan_completed(priv->hw); + ieee80211_scan_completed(priv->hw, false); /* Since setting the TXPOWER may have been deferred while * performing the scan, fire one off */ diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c index 42cc2884971c..0cd8cb96a5ef 100644 --- a/drivers/net/wireless/iwlwifi/iwl3945-base.c +++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c @@ -4442,15 +4442,23 @@ static void iwl3945_bss_info_changed(struct ieee80211_hw *hw, } -static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len) +static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, + struct cfg80211_scan_request *req) { int rc = 0; unsigned long flags; struct iwl_priv *priv = hw->priv; + size_t len = 0; + u8 *ssid = NULL; DECLARE_SSID_BUF(ssid_buf); IWL_DEBUG_MAC80211(priv, "enter\n"); + if (req->n_ssids) { + ssid = req->ssids[0].ssid; + len = req->ssids[0].ssid_len; + } + mutex_lock(&priv->mutex); spin_lock_irqsave(&priv->lock, flags); @@ -4478,9 +4486,8 @@ static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len) print_ssid(ssid_buf, ssid, len), len); priv->one_direct_scan = 1; - priv->direct_ssid_len = (u8) - min((u8) len, (u8) IW_ESSID_MAX_SIZE); - memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len); + priv->direct_ssid_len = len; + memcpy(priv->direct_ssid, ssid, len); } else priv->one_direct_scan = 0; @@ -5412,6 +5419,8 @@ static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *e hw->wiphy->custom_regulatory = true; + hw->wiphy->max_scan_ssids = 1; + /* 4 EDCA QOS priorities */ hw->queues = 4; diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h index 4bc27049f4e5..8802d1bda382 100644 --- a/include/linux/nl80211.h +++ b/include/linux/nl80211.h @@ -143,6 +143,13 @@ * added to all specified management frames generated by * kernel/firmware/driver. * + * @NL80211_CMD_GET_SCAN: get scan results + * @NL80211_CMD_TRIGGER_SCAN: trigger a new scan with the given parameters + * @NL80211_CMD_NEW_SCAN_RESULTS: scan notification (as a reply to + * NL80211_CMD_GET_SCAN and on the "scan" multicast group) + * @NL80211_CMD_SCAN_ABORTED: scan was aborted, for unspecified reasons, + * partial scan results may be available + * * @NL80211_CMD_MAX: highest used command number * @__NL80211_CMD_AFTER_LAST: internal use */ @@ -192,6 +199,11 @@ enum nl80211_commands { NL80211_CMD_GET_REG, + NL80211_CMD_GET_SCAN, + NL80211_CMD_TRIGGER_SCAN, + NL80211_CMD_NEW_SCAN_RESULTS, + NL80211_CMD_SCAN_ABORTED, + /* add new commands above here */ /* used to define NL80211_CMD_MAX below */ @@ -305,6 +317,18 @@ enum nl80211_commands { * @NL80211_ATTR_IE: Information element(s) data (used, e.g., with * %NL80211_CMD_SET_MGMT_EXTRA_IE). * + * @NL80211_ATTR_MAX_NUM_SCAN_SSIDS: number of SSIDs you can scan with + * a single scan request, a wiphy attribute. + * + * @NL80211_ATTR_SCAN_FREQUENCIES: nested attribute with frequencies (in MHz) + * @NL80211_ATTR_SCAN_SSIDS: nested attribute with SSIDs, leave out for passive + * scanning and include a zero-length SSID (wildcard) for wildcard scan + * @NL80211_ATTR_SCAN_GENERATION: the scan generation increases whenever the + * scan result list changes (BSS expired or added) so that applications + * can verify that they got a single, consistent snapshot (when all dump + * messages carried the same generation number) + * @NL80211_ATTR_BSS: scan result BSS + * * @NL80211_ATTR_MAX: highest attribute number currently defined * @__NL80211_ATTR_AFTER_LAST: internal use */ @@ -372,6 +396,13 @@ enum nl80211_attrs { NL80211_ATTR_MGMT_SUBTYPE, NL80211_ATTR_IE, + NL80211_ATTR_MAX_NUM_SCAN_SSIDS, + + NL80211_ATTR_SCAN_FREQUENCIES, + NL80211_ATTR_SCAN_SSIDS, + NL80211_ATTR_SCAN_GENERATION, + NL80211_ATTR_BSS, + /* add attributes here, update the policy in nl80211.c */ __NL80211_ATTR_AFTER_LAST, @@ -841,4 +872,38 @@ enum nl80211_channel_type { NL80211_CHAN_HT40MINUS, NL80211_CHAN_HT40PLUS }; + +/** + * enum nl80211_bss - netlink attributes for a BSS + * + * @__NL80211_BSS_INVALID: invalid + * @NL80211_BSS_FREQUENCY: frequency in MHz (u32) + * @NL80211_BSS_TSF: TSF of the received probe response/beacon (u64) + * @NL80211_BSS_BEACON_INTERVAL: beacon interval of the (I)BSS (u16) + * @NL80211_BSS_CAPABILITY: capability field (CPU order, u16) + * @NL80211_BSS_INFORMATION_ELEMENTS: binary attribute containing the + * raw information elements from the probe response/beacon (bin) + * @NL80211_BSS_SIGNAL_MBM: signal strength of probe response/beacon + * in mBm (100 * dBm) (s32) + * @NL80211_BSS_SIGNAL_UNSPEC: signal strength of the probe response/beacon + * in unspecified units, scaled to 0..100 (u8) + * @__NL80211_BSS_AFTER_LAST: internal + * @NL80211_BSS_MAX: highest BSS attribute + */ +enum nl80211_bss { + __NL80211_BSS_INVALID, + NL80211_BSS_BSSID, + NL80211_BSS_FREQUENCY, + NL80211_BSS_TSF, + NL80211_BSS_BEACON_INTERVAL, + NL80211_BSS_CAPABILITY, + NL80211_BSS_INFORMATION_ELEMENTS, + NL80211_BSS_SIGNAL_MBM, + NL80211_BSS_SIGNAL_UNSPEC, + + /* keep last */ + __NL80211_BSS_AFTER_LAST, + NL80211_BSS_MAX = __NL80211_BSS_AFTER_LAST - 1 +}; + #endif /* __LINUX_NL80211_H */ diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index dd1fd51638fc..09a0b268e5cf 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -4,6 +4,10 @@ #include #include #include +#include +#include +#include +#include #include /* remove once we remove the wext stuff */ #include @@ -504,6 +508,83 @@ struct wiphy; /* from net/ieee80211.h */ struct ieee80211_channel; +/** + * struct cfg80211_ssid - SSID description + * @ssid: the SSID + * @ssid_len: length of the ssid + */ +struct cfg80211_ssid { + u8 ssid[IEEE80211_MAX_SSID_LEN]; + u8 ssid_len; +}; + +/** + * struct cfg80211_scan_request - scan request description + * + * @ssids: SSIDs to scan for (active scan only) + * @n_ssids: number of SSIDs + * @channels: channels to scan on. + * @n_channels: number of channels for each band + * @wiphy: the wiphy this was for + * @ifidx: the interface index + */ +struct cfg80211_scan_request { + struct cfg80211_ssid *ssids; + int n_ssids; + struct ieee80211_channel **channels; + u32 n_channels; + + /* internal */ + struct wiphy *wiphy; + int ifidx; +}; + +/** + * enum cfg80211_signal_type - signal type + * + * @CFG80211_SIGNAL_TYPE_NONE: no signal strength information available + * @CFG80211_SIGNAL_TYPE_MBM: signal strength in mBm (100*dBm) + * @CFG80211_SIGNAL_TYPE_UNSPEC: signal strength, increasing from 0 through 100 + */ +enum cfg80211_signal_type { + CFG80211_SIGNAL_TYPE_NONE, + CFG80211_SIGNAL_TYPE_MBM, + CFG80211_SIGNAL_TYPE_UNSPEC, +}; + +/** + * struct cfg80211_bss - BSS description + * + * This structure describes a BSS (which may also be a mesh network) + * for use in scan results and similar. + * + * @bssid: BSSID of the BSS + * @tsf: timestamp of last received update + * @beacon_interval: the beacon interval as from the frame + * @capability: the capability field in host byte order + * @information_elements: the information elements (Note that there + * is no guarantee that these are well-formed!) + * @len_information_elements: total length of the information elements + * @signal: signal strength value + * @signal_type: signal type + * @priv: private area for driver use, has at least wiphy->bss_priv_size bytes + */ +struct cfg80211_bss { + struct ieee80211_channel *channel; + + u8 bssid[ETH_ALEN]; + u64 tsf; + u16 beacon_interval; + u16 capability; + u8 *information_elements; + size_t len_information_elements; + + s32 signal; + enum cfg80211_signal_type signal_type; + + u8 priv[0] __attribute__((__aligned__(sizeof(void *)))); +}; + /** * struct cfg80211_ops - backend description for wireless configuration * @@ -571,6 +652,11 @@ struct ieee80211_channel; * @set_channel: Set channel * * @set_mgmt_extra_ie: Set extra IE data for management frames + * + * @scan: Request to do a scan. If returning zero, the scan request is given + * the driver, and will be valid until passed to cfg80211_scan_done(). + * For scan results, call cfg80211_inform_bss(); you can call this outside + * the scan/scan_done bracket too. */ struct cfg80211_ops { int (*suspend)(struct wiphy *wiphy); @@ -648,6 +734,9 @@ struct cfg80211_ops { int (*set_mgmt_extra_ie)(struct wiphy *wiphy, struct net_device *dev, struct mgmt_extra_ie_params *params); + + int (*scan)(struct wiphy *wiphy, struct net_device *dev, + struct cfg80211_scan_request *request); }; /* temporary wext handlers */ @@ -658,5 +747,47 @@ int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info, u32 *mode, char *extra); int cfg80211_wext_giwmode(struct net_device *dev, struct iw_request_info *info, u32 *mode, char *extra); +int cfg80211_wext_siwscan(struct net_device *dev, + struct iw_request_info *info, + union iwreq_data *wrqu, char *extra); +int cfg80211_wext_giwscan(struct net_device *dev, + struct iw_request_info *info, + struct iw_point *data, char *extra); + +/** + * cfg80211_scan_done - notify that scan finished + * + * @request: the corresponding scan request + * @aborted: set to true if the scan was aborted for any reason, + * userspace will be notified of that + */ +void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted); + +/** + * cfg80211_inform_bss - inform cfg80211 of a new BSS + * + * @wiphy: the wiphy reporting the BSS + * @bss: the found BSS + * @gfp: context flags + * + * This informs cfg80211 that BSS information was found and + * the BSS should be updated/added. + */ +struct cfg80211_bss* +cfg80211_inform_bss_frame(struct wiphy *wiphy, + struct ieee80211_channel *channel, + struct ieee80211_mgmt *mgmt, size_t len, + s32 signal, enum cfg80211_signal_type sigtype, + gfp_t gfp); + +struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy, + struct ieee80211_channel *channel, + const u8 *bssid, + const u8 *ssid, size_t ssid_len); +struct cfg80211_bss *cfg80211_get_mesh(struct wiphy *wiphy, + struct ieee80211_channel *channel, + const u8 *meshid, size_t meshidlen, + const u8 *meshcfg); +void cfg80211_put_bss(struct cfg80211_bss *bss); #endif /* __NET_CFG80211_H */ diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 341f3e595ebd..88fa3e03e3e9 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1406,7 +1406,8 @@ struct ieee80211_ops { void (*update_tkip_key)(struct ieee80211_hw *hw, struct ieee80211_key_conf *conf, const u8 *address, u32 iv32, u16 *phase1key); - int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len); + int (*hw_scan)(struct ieee80211_hw *hw, + struct cfg80211_scan_request *req); int (*get_stats)(struct ieee80211_hw *hw, struct ieee80211_low_level_stats *stats); void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, @@ -1844,8 +1845,9 @@ void ieee80211_wake_queues(struct ieee80211_hw *hw); * mac80211 that the scan finished. * * @hw: the hardware that finished the scan + * @aborted: set to true if scan was aborted */ -void ieee80211_scan_completed(struct ieee80211_hw *hw); +void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); /** * ieee80211_iterate_active_interfaces - iterate active interfaces diff --git a/include/net/wireless.h b/include/net/wireless.h index a42c1562d52b..1c6285eb1666 100644 --- a/include/net/wireless.h +++ b/include/net/wireless.h @@ -213,6 +213,9 @@ struct wiphy { bool custom_regulatory; bool strict_regulatory; + int bss_priv_size; + u8 max_scan_ssids; + /* If multiple wiphys are registered and you're handed e.g. * a regular netdev with assigned ieee80211_ptr, you won't * know whether it points to a wiphy your driver has registered diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 42d692fd9bec..c8d969be440b 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1277,6 +1277,25 @@ static int ieee80211_resume(struct wiphy *wiphy) #define ieee80211_resume NULL #endif +static int ieee80211_scan(struct wiphy *wiphy, + struct net_device *dev, + struct cfg80211_scan_request *req) +{ + struct ieee80211_sub_if_data *sdata; + + if (!netif_running(dev)) + return -ENETDOWN; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + if (sdata->vif.type != NL80211_IFTYPE_STATION && + sdata->vif.type != NL80211_IFTYPE_ADHOC && + sdata->vif.type != NL80211_IFTYPE_MESH_POINT) + return -EOPNOTSUPP; + + return ieee80211_request_scan(sdata, req); +} + struct cfg80211_ops mac80211_config_ops = { .add_virtual_intf = ieee80211_add_iface, .del_virtual_intf = ieee80211_del_iface, @@ -1309,4 +1328,5 @@ struct cfg80211_ops mac80211_config_ops = { .set_mgmt_extra_ie = ieee80211_set_mgmt_extra_ie, .suspend = ieee80211_suspend, .resume = ieee80211_resume, + .scan = ieee80211_scan, }; diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 9122416fd6af..cbc0b7d647f9 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -294,8 +294,6 @@ struct ieee80211_if_sta { u8 ssid[IEEE80211_MAX_SSID_LEN]; enum ieee80211_sta_mlme_state state; size_t ssid_len; - u8 scan_ssid[IEEE80211_MAX_SSID_LEN]; - size_t scan_ssid_len; u16 aid; u16 ap_capab, capab; u8 *extra_ie; /* to be added to the end of AssocReq */ @@ -658,17 +656,18 @@ struct ieee80211_local { /* Scanning and BSS list */ bool sw_scanning, hw_scanning; + struct cfg80211_ssid scan_ssid; + struct cfg80211_scan_request int_scan_req; + struct cfg80211_scan_request *scan_req; + struct ieee80211_channel *scan_channel; int scan_channel_idx; - enum ieee80211_band scan_band; enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state; unsigned long last_scan_completed; struct delayed_work scan_work; struct ieee80211_sub_if_data *scan_sdata; - struct ieee80211_channel *oper_channel, *scan_channel, *csa_channel; enum nl80211_channel_type oper_channel_type; - u8 scan_ssid[IEEE80211_MAX_SSID_LEN]; - size_t scan_ssid_len; + struct ieee80211_channel *oper_channel, *csa_channel; struct list_head bss_list; struct ieee80211_bss *bss_hash[STA_HASH_SIZE]; spinlock_t bss_lock; @@ -929,7 +928,7 @@ void ieee80211_send_pspoll(struct ieee80211_local *local, /* scan/BSS handling */ int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata, - u8 *ssid, size_t ssid_len); + struct cfg80211_scan_request *req); int ieee80211_scan_results(struct ieee80211_local *local, struct iw_request_info *info, char *buf, size_t len); @@ -944,14 +943,15 @@ int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local); int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata, - u8 *ssid, size_t ssid_len); + struct cfg80211_scan_request *req); struct ieee80211_bss * ieee80211_bss_info_update(struct ieee80211_local *local, struct ieee80211_rx_status *rx_status, struct ieee80211_mgmt *mgmt, size_t len, struct ieee802_11_elems *elems, - int freq, bool beacon); + struct ieee80211_channel *channel, + bool beacon); struct ieee80211_bss * ieee80211_rx_bss_add(struct ieee80211_local *local, u8 *bssid, int freq, u8 *ssid, u8 ssid_len); diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index 1c17fb8e4058..df94b9365264 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -522,7 +522,7 @@ static int ieee80211_stop(struct net_device *dev) * scan event to userspace -- the scan is incomplete. */ if (local->sw_scanning) - ieee80211_scan_completed(&local->hw); + ieee80211_scan_completed(&local->hw, true); } conf.vif = &sdata->vif; diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 956afea4214d..954edfbb6b6f 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -733,6 +733,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, return NULL; wiphy->privid = mac80211_wiphy_privid; + wiphy->max_scan_ssids = 4; local = wiphy_priv(wiphy); local->hw.wiphy = wiphy; @@ -817,25 +818,33 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) enum ieee80211_band band; struct net_device *mdev; struct ieee80211_master_priv *mpriv; + int channels, i, j; /* * generic code guarantees at least one band, * set this very early because much code assumes * that hw.conf.channel is assigned */ + channels = 0; for (band = 0; band < IEEE80211_NUM_BANDS; band++) { struct ieee80211_supported_band *sband; sband = local->hw.wiphy->bands[band]; - if (sband) { + if (sband && !local->oper_channel) { /* init channel we're on */ local->hw.conf.channel = local->oper_channel = local->scan_channel = &sband->channels[0]; - break; } + if (sband) + channels += sband->n_channels; } + local->int_scan_req.n_channels = channels; + local->int_scan_req.channels = kzalloc(sizeof(void *) * channels, GFP_KERNEL); + if (!local->int_scan_req.channels) + return -ENOMEM; + /* if low-level driver supports AP, we also support VLAN */ if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); @@ -845,7 +854,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) result = wiphy_register(local->hw.wiphy); if (result < 0) - return result; + goto fail_wiphy_register; /* * We use the number of queues for feature tests (QoS, HT) internally @@ -948,6 +957,20 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) ieee80211_led_init(local); + /* alloc internal scan request */ + i = 0; + local->int_scan_req.ssids = &local->scan_ssid; + local->int_scan_req.n_ssids = 1; + for (band = 0; band < IEEE80211_NUM_BANDS; band++) { + if (!hw->wiphy->bands[band]) + continue; + for (j = 0; j < hw->wiphy->bands[band]->n_channels; j++) { + local->int_scan_req.channels[i] = + &hw->wiphy->bands[band]->channels[j]; + i++; + } + } + return 0; fail_wep: @@ -966,6 +989,8 @@ fail_workqueue: free_netdev(local->mdev); fail_mdev_alloc: wiphy_unregister(local->hw.wiphy); +fail_wiphy_register: + kfree(local->int_scan_req.channels); return result; } EXPORT_SYMBOL(ieee80211_register_hw); @@ -1011,6 +1036,7 @@ void ieee80211_unregister_hw(struct ieee80211_hw *hw) ieee80211_wep_free(local); ieee80211_led_exit(local); free_netdev(local->mdev); + kfree(local->int_scan_req.channels); } EXPORT_SYMBOL(ieee80211_unregister_hw); diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index bfc47b330687..46b4817cdea9 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -1743,7 +1743,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, } bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, - freq, beacon); + channel, beacon); if (!bss) return; @@ -2162,7 +2162,15 @@ static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata, printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " "IBSS networks with same SSID (merge)\n", sdata->dev->name); - ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len); + + /* XXX maybe racy? */ + if (sdata->local->scan_req) + return; + + memcpy(sdata->local->int_scan_req.ssids[0].ssid, + ifsta->ssid, IEEE80211_MAX_SSID_LEN); + sdata->local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len; + ieee80211_request_scan(sdata, &sdata->local->int_scan_req); } @@ -2378,8 +2386,15 @@ dont_join: IEEE80211_SCAN_INTERVAL)) { printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " "join\n", sdata->dev->name); - return ieee80211_request_scan(sdata, ifsta->ssid, - ifsta->ssid_len); + + /* XXX maybe racy? */ + if (local->scan_req) + return -EBUSY; + + memcpy(local->int_scan_req.ssids[0].ssid, + ifsta->ssid, IEEE80211_MAX_SSID_LEN); + local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len; + return ieee80211_request_scan(sdata, &local->int_scan_req); } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) { int interval = IEEE80211_SCAN_INTERVAL; @@ -2478,11 +2493,16 @@ static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, } else { if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { ifsta->assoc_scan_tries++; + /* XXX maybe racy? */ + if (local->scan_req) + return -1; + memcpy(local->int_scan_req.ssids[0].ssid, + ifsta->ssid, IEEE80211_MAX_SSID_LEN); if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) - ieee80211_start_scan(sdata, NULL, 0); + local->int_scan_req.ssids[0].ssid_len = 0; else - ieee80211_start_scan(sdata, ifsta->ssid, - ifsta->ssid_len); + local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len; + ieee80211_start_scan(sdata, &local->int_scan_req); ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); } else { @@ -2520,8 +2540,7 @@ static void ieee80211_sta_work(struct work_struct *work) ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && ifsta->state != IEEE80211_STA_MLME_ASSOCIATE && test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { - ieee80211_start_scan(sdata, ifsta->scan_ssid, - ifsta->scan_ssid_len); + ieee80211_start_scan(sdata, local->scan_req); return; } diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index eddca4e1e13c..c6b275b10cf9 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -13,6 +13,9 @@ */ /* TODO: + * figure out how to avoid that the "current BSS" expires + * clean up IBSS code (in MLME), see why it adds a BSS to the list + * use cfg80211's BSS handling (depends on IBSS TODO above) * order BSS list by RSSI(?) ("quality of AP") * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE, * SSID) @@ -225,10 +228,26 @@ ieee80211_bss_info_update(struct ieee80211_local *local, struct ieee80211_mgmt *mgmt, size_t len, struct ieee802_11_elems *elems, - int freq, bool beacon) + struct ieee80211_channel *channel, + bool beacon) { struct ieee80211_bss *bss; - int clen; + int clen, freq = channel->center_freq; + enum cfg80211_signal_type sigtype = CFG80211_SIGNAL_TYPE_NONE; + s32 signal = 0; + + if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) { + sigtype = CFG80211_SIGNAL_TYPE_MBM; + signal = rx_status->signal * 100; + } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) { + sigtype = CFG80211_SIGNAL_TYPE_UNSPEC; + signal = (rx_status->signal * 100) / local->hw.max_signal; + } + + cfg80211_put_bss( + cfg80211_inform_bss_frame(local->hw.wiphy, channel, + mgmt, len, signal, sigtype, + GFP_ATOMIC)); #ifdef CONFIG_MAC80211_MESH if (elems->mesh_config) @@ -401,7 +420,7 @@ ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, bss = ieee80211_bss_info_update(sdata->local, rx_status, mgmt, skb->len, &elems, - freq, beacon); + channel, beacon); if (bss) ieee80211_rx_bss_put(sdata->local, bss); @@ -439,26 +458,22 @@ void ieee80211_send_nullfunc(struct ieee80211_local *local, ieee80211_tx_skb(sdata, skb, 0); } -void ieee80211_scan_completed(struct ieee80211_hw *hw) +void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) { struct ieee80211_local *local = hw_to_local(hw); struct ieee80211_sub_if_data *sdata; - union iwreq_data wrqu; if (WARN_ON(!local->hw_scanning && !local->sw_scanning)) return; - local->last_scan_completed = jiffies; - memset(&wrqu, 0, sizeof(wrqu)); + if (WARN_ON(!local->scan_req)) + return; - /* - * local->scan_sdata could have been NULLed by the interface - * down code in case we were scanning on an interface that is - * being taken down. - */ - sdata = local->scan_sdata; - if (sdata) - wireless_send_event(sdata->dev, SIOCGIWSCAN, &wrqu, NULL); + if (local->scan_req != &local->int_scan_req) + cfg80211_scan_done(local->scan_req, aborted); + local->scan_req = NULL; + + local->last_scan_completed = jiffies; if (local->hw_scanning) { local->hw_scanning = false; @@ -520,9 +535,8 @@ void ieee80211_scan_work(struct work_struct *work) struct ieee80211_local *local = container_of(work, struct ieee80211_local, scan_work.work); struct ieee80211_sub_if_data *sdata = local->scan_sdata; - struct ieee80211_supported_band *sband; struct ieee80211_channel *chan; - int skip; + int skip, i; unsigned long next_delay = 0; /* @@ -533,33 +547,13 @@ void ieee80211_scan_work(struct work_struct *work) switch (local->scan_state) { case SCAN_SET_CHANNEL: - /* - * Get current scan band. scan_band may be IEEE80211_NUM_BANDS - * after we successfully scanned the last channel of the last - * band (and the last band is supported by the hw) - */ - if (local->scan_band < IEEE80211_NUM_BANDS) - sband = local->hw.wiphy->bands[local->scan_band]; - else - sband = NULL; - - /* - * If we are at an unsupported band and have more bands - * left to scan, advance to the next supported one. - */ - while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) { - local->scan_band++; - sband = local->hw.wiphy->bands[local->scan_band]; - local->scan_channel_idx = 0; - } - /* if no more bands/channels left, complete scan */ - if (!sband || local->scan_channel_idx >= sband->n_channels) { - ieee80211_scan_completed(local_to_hw(local)); + if (local->scan_channel_idx >= local->scan_req->n_channels) { + ieee80211_scan_completed(local_to_hw(local), false); return; } skip = 0; - chan = &sband->channels[local->scan_channel_idx]; + chan = local->scan_req->channels[local->scan_channel_idx]; if (chan->flags & IEEE80211_CHAN_DISABLED || (sdata->vif.type == NL80211_IFTYPE_ADHOC && @@ -575,15 +569,6 @@ void ieee80211_scan_work(struct work_struct *work) /* advance state machine to next channel/band */ local->scan_channel_idx++; - if (local->scan_channel_idx >= sband->n_channels) { - /* - * scan_band may end up == IEEE80211_NUM_BANDS, but - * we'll catch that case above and complete the scan - * if that is the case. - */ - local->scan_band++; - local->scan_channel_idx = 0; - } if (skip) break; @@ -596,10 +581,14 @@ void ieee80211_scan_work(struct work_struct *work) next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; local->scan_state = SCAN_SET_CHANNEL; - if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN) + if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN || + !local->scan_req->n_ssids) break; - ieee80211_send_probe_req(sdata, NULL, local->scan_ssid, - local->scan_ssid_len); + for (i = 0; i < local->scan_req->n_ssids; i++) + ieee80211_send_probe_req( + sdata, NULL, + local->scan_req->ssids[i].ssid, + local->scan_req->ssids[i].ssid_len); next_delay = IEEE80211_CHANNEL_TIME; break; } @@ -610,14 +599,19 @@ void ieee80211_scan_work(struct work_struct *work) int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata, - u8 *ssid, size_t ssid_len) + struct cfg80211_scan_request *req) { struct ieee80211_local *local = scan_sdata->local; struct ieee80211_sub_if_data *sdata; - if (ssid_len > IEEE80211_MAX_SSID_LEN) + if (!req) return -EINVAL; + if (local->scan_req && local->scan_req != req) + return -EBUSY; + + local->scan_req = req; + /* MLME-SCAN.request (page 118) page 144 (11.1.3.1) * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS * BSSID: MACAddress @@ -645,7 +639,7 @@ int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata, int rc; local->hw_scanning = true; - rc = local->ops->hw_scan(local_to_hw(local), ssid, ssid_len); + rc = local->ops->hw_scan(local_to_hw(local), req); if (rc) { local->hw_scanning = false; return rc; @@ -678,15 +672,10 @@ int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata, } mutex_unlock(&local->iflist_mtx); - if (ssid) { - local->scan_ssid_len = ssid_len; - memcpy(local->scan_ssid, ssid, ssid_len); - } else - local->scan_ssid_len = 0; local->scan_state = SCAN_SET_CHANNEL; local->scan_channel_idx = 0; - local->scan_band = IEEE80211_BAND_2GHZ; local->scan_sdata = scan_sdata; + local->scan_req = req; netif_addr_lock_bh(local->mdev); local->filter_flags |= FIF_BCN_PRBRESP_PROMISC; @@ -706,13 +695,21 @@ int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata, int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata, - u8 *ssid, size_t ssid_len) + struct cfg80211_scan_request *req) { struct ieee80211_local *local = sdata->local; struct ieee80211_if_sta *ifsta; + if (!req) + return -EINVAL; + + if (local->scan_req && local->scan_req != req) + return -EBUSY; + + local->scan_req = req; + if (sdata->vif.type != NL80211_IFTYPE_STATION) - return ieee80211_start_scan(sdata, ssid, ssid_len); + return ieee80211_start_scan(sdata, req); /* * STA has a state machine that might need to defer scanning @@ -727,241 +724,8 @@ int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata, } ifsta = &sdata->u.sta; - - ifsta->scan_ssid_len = ssid_len; - if (ssid_len) - memcpy(ifsta->scan_ssid, ssid, ssid_len); set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request); queue_work(local->hw.workqueue, &ifsta->work); return 0; } - - -static void ieee80211_scan_add_ies(struct iw_request_info *info, - struct ieee80211_bss *bss, - char **current_ev, char *end_buf) -{ - u8 *pos, *end, *next; - struct iw_event iwe; - - if (bss == NULL || bss->ies == NULL) - return; - - /* - * If needed, fragment the IEs buffer (at IE boundaries) into short - * enough fragments to fit into IW_GENERIC_IE_MAX octet messages. - */ - pos = bss->ies; - end = pos + bss->ies_len; - - while (end - pos > IW_GENERIC_IE_MAX) { - next = pos + 2 + pos[1]; - while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX) - next = next + 2 + next[1]; - - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVGENIE; - iwe.u.data.length = next - pos; - *current_ev = iwe_stream_add_point(info, *current_ev, - end_buf, &iwe, pos); - - pos = next; - } - - if (end > pos) { - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVGENIE; - iwe.u.data.length = end - pos; - *current_ev = iwe_stream_add_point(info, *current_ev, - end_buf, &iwe, pos); - } -} - - -static char * -ieee80211_scan_result(struct ieee80211_local *local, - struct iw_request_info *info, - struct ieee80211_bss *bss, - char *current_ev, char *end_buf) -{ - struct iw_event iwe; - char *buf; - - if (time_after(jiffies, - bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE)) - return current_ev; - - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWAP; - iwe.u.ap_addr.sa_family = ARPHRD_ETHER; - memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN); - current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, - IW_EV_ADDR_LEN); - - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWESSID; - if (bss_mesh_cfg(bss)) { - iwe.u.data.length = bss_mesh_id_len(bss); - iwe.u.data.flags = 1; - current_ev = iwe_stream_add_point(info, current_ev, end_buf, - &iwe, bss_mesh_id(bss)); - } else { - iwe.u.data.length = bss->ssid_len; - iwe.u.data.flags = 1; - current_ev = iwe_stream_add_point(info, current_ev, end_buf, - &iwe, bss->ssid); - } - - if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) - || bss_mesh_cfg(bss)) { - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWMODE; - if (bss_mesh_cfg(bss)) - iwe.u.mode = IW_MODE_MESH; - else if (bss->capability & WLAN_CAPABILITY_ESS) - iwe.u.mode = IW_MODE_MASTER; - else - iwe.u.mode = IW_MODE_ADHOC; - current_ev = iwe_stream_add_event(info, current_ev, end_buf, - &iwe, IW_EV_UINT_LEN); - } - - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWFREQ; - iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq); - iwe.u.freq.e = 0; - current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, - IW_EV_FREQ_LEN); - - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWFREQ; - iwe.u.freq.m = bss->freq; - iwe.u.freq.e = 6; - current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, - IW_EV_FREQ_LEN); - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVQUAL; - iwe.u.qual.qual = bss->qual; - iwe.u.qual.level = bss->signal; - iwe.u.qual.noise = bss->noise; - iwe.u.qual.updated = local->wstats_flags; - current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, - IW_EV_QUAL_LEN); - - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWENCODE; - if (bss->capability & WLAN_CAPABILITY_PRIVACY) - iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; - else - iwe.u.data.flags = IW_ENCODE_DISABLED; - iwe.u.data.length = 0; - current_ev = iwe_stream_add_point(info, current_ev, end_buf, - &iwe, ""); - - ieee80211_scan_add_ies(info, bss, ¤t_ev, end_buf); - - if (bss->supp_rates_len > 0) { - /* display all supported rates in readable format */ - char *p = current_ev + iwe_stream_lcp_len(info); - int i; - - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWRATE; - /* Those two flags are ignored... */ - iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; - - for (i = 0; i < bss->supp_rates_len; i++) { - iwe.u.bitrate.value = ((bss->supp_rates[i] & - 0x7f) * 500000); - p = iwe_stream_add_value(info, current_ev, p, - end_buf, &iwe, IW_EV_PARAM_LEN); - } - current_ev = p; - } - - buf = kmalloc(30, GFP_ATOMIC); - if (buf) { - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVCUSTOM; - sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp)); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, end_buf, - &iwe, buf); - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVCUSTOM; - sprintf(buf, " Last beacon: %dms ago", - jiffies_to_msecs(jiffies - bss->last_update)); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, - end_buf, &iwe, buf); - kfree(buf); - } - - if (bss_mesh_cfg(bss)) { - u8 *cfg = bss_mesh_cfg(bss); - buf = kmalloc(50, GFP_ATOMIC); - if (buf) { - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVCUSTOM; - sprintf(buf, "Mesh network (version %d)", cfg[0]); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, - end_buf, - &iwe, buf); - sprintf(buf, "Path Selection Protocol ID: " - "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3], - cfg[4]); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, - end_buf, - &iwe, buf); - sprintf(buf, "Path Selection Metric ID: " - "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7], - cfg[8]); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, - end_buf, - &iwe, buf); - sprintf(buf, "Congestion Control Mode ID: " - "0x%02X%02X%02X%02X", cfg[9], cfg[10], - cfg[11], cfg[12]); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, - end_buf, - &iwe, buf); - sprintf(buf, "Channel Precedence: " - "0x%02X%02X%02X%02X", cfg[13], cfg[14], - cfg[15], cfg[16]); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, - end_buf, - &iwe, buf); - kfree(buf); - } - } - - return current_ev; -} - - -int ieee80211_scan_results(struct ieee80211_local *local, - struct iw_request_info *info, - char *buf, size_t len) -{ - char *current_ev = buf; - char *end_buf = buf + len; - struct ieee80211_bss *bss; - - spin_lock_bh(&local->bss_lock); - list_for_each_entry(bss, &local->bss_list, list) { - if (buf + len - current_ev <= IW_EV_ADDR_LEN) { - spin_unlock_bh(&local->bss_lock); - return -E2BIG; - } - current_ev = ieee80211_scan_result(local, info, bss, - current_ev, end_buf); - } - spin_unlock_bh(&local->bss_lock); - return current_ev - buf; -} diff --git a/net/mac80211/wext.c b/net/mac80211/wext.c index acd5808b87f4..b337d7d5edb3 100644 --- a/net/mac80211/wext.c +++ b/net/mac80211/wext.c @@ -173,8 +173,9 @@ static int ieee80211_ioctl_giwrange(struct net_device *dev, range->num_encoding_sizes = 2; range->max_encoding_tokens = NUM_DEFAULT_KEYS; + /* cfg80211 requires this, and enforces 0..100 */ if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) - range->max_qual.level = local->hw.max_signal; + range->max_qual.level = 100; else if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) range->max_qual.level = -110; else @@ -415,58 +416,6 @@ static int ieee80211_ioctl_giwap(struct net_device *dev, } -static int ieee80211_ioctl_siwscan(struct net_device *dev, - struct iw_request_info *info, - union iwreq_data *wrqu, char *extra) -{ - struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); - struct iw_scan_req *req = NULL; - u8 *ssid = NULL; - size_t ssid_len = 0; - - if (!netif_running(dev)) - return -ENETDOWN; - - if (sdata->vif.type != NL80211_IFTYPE_STATION && - sdata->vif.type != NL80211_IFTYPE_ADHOC && - sdata->vif.type != NL80211_IFTYPE_MESH_POINT) - return -EOPNOTSUPP; - - /* if SSID was specified explicitly then use that */ - if (wrqu->data.length == sizeof(struct iw_scan_req) && - wrqu->data.flags & IW_SCAN_THIS_ESSID) { - req = (struct iw_scan_req *)extra; - ssid = req->essid; - ssid_len = req->essid_len; - } - - return ieee80211_request_scan(sdata, ssid, ssid_len); -} - - -static int ieee80211_ioctl_giwscan(struct net_device *dev, - struct iw_request_info *info, - struct iw_point *data, char *extra) -{ - int res; - struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); - struct ieee80211_sub_if_data *sdata; - - sdata = IEEE80211_DEV_TO_SUB_IF(dev); - - if (local->sw_scanning || local->hw_scanning) - return -EAGAIN; - - res = ieee80211_scan_results(local, info, extra, data->length); - if (res >= 0) { - data->length = res; - return 0; - } - data->length = 0; - return res; -} - - static int ieee80211_ioctl_siwrate(struct net_device *dev, struct iw_request_info *info, struct iw_param *rate, char *extra) @@ -1165,8 +1114,8 @@ static const iw_handler ieee80211_handler[] = (iw_handler) ieee80211_ioctl_giwap, /* SIOCGIWAP */ (iw_handler) ieee80211_ioctl_siwmlme, /* SIOCSIWMLME */ (iw_handler) NULL, /* SIOCGIWAPLIST */ - (iw_handler) ieee80211_ioctl_siwscan, /* SIOCSIWSCAN */ - (iw_handler) ieee80211_ioctl_giwscan, /* SIOCGIWSCAN */ + (iw_handler) cfg80211_wext_siwscan, /* SIOCSIWSCAN */ + (iw_handler) cfg80211_wext_giwscan, /* SIOCGIWSCAN */ (iw_handler) ieee80211_ioctl_siwessid, /* SIOCSIWESSID */ (iw_handler) ieee80211_ioctl_giwessid, /* SIOCGIWESSID */ (iw_handler) NULL, /* SIOCSIWNICKN */ diff --git a/net/wireless/Makefile b/net/wireless/Makefile index 938a334c8dbc..dad43c24f695 100644 --- a/net/wireless/Makefile +++ b/net/wireless/Makefile @@ -5,7 +5,7 @@ obj-$(CONFIG_LIB80211_CRYPT_WEP) += lib80211_crypt_wep.o obj-$(CONFIG_LIB80211_CRYPT_CCMP) += lib80211_crypt_ccmp.o obj-$(CONFIG_LIB80211_CRYPT_TKIP) += lib80211_crypt_tkip.o -cfg80211-y += core.o sysfs.o radiotap.o util.o reg.o +cfg80211-y += core.o sysfs.o radiotap.o util.o reg.o scan.o cfg80211-$(CONFIG_WIRELESS_EXT) += wext-compat.o cfg80211-$(CONFIG_NL80211) += nl80211.o diff --git a/net/wireless/core.c b/net/wireless/core.c index 125226476089..3cccd1390cea 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -240,6 +240,8 @@ struct wiphy *wiphy_new(struct cfg80211_ops *ops, int sizeof_priv) mutex_init(&drv->mtx); mutex_init(&drv->devlist_mtx); INIT_LIST_HEAD(&drv->netdev_list); + spin_lock_init(&drv->bss_lock); + INIT_LIST_HEAD(&drv->bss_list); device_initialize(&drv->wiphy.dev); drv->wiphy.dev.class = &ieee80211_class; @@ -259,6 +261,9 @@ int wiphy_register(struct wiphy *wiphy) int i; u16 ifmodes = wiphy->interface_modes; + if (WARN_ON(wiphy->max_scan_ssids < 1)) + return -EINVAL; + /* sanity check ifmodes */ WARN_ON(!ifmodes); ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1; @@ -367,8 +372,11 @@ EXPORT_SYMBOL(wiphy_unregister); void cfg80211_dev_free(struct cfg80211_registered_device *drv) { + struct cfg80211_internal_bss *scan, *tmp; mutex_destroy(&drv->mtx); mutex_destroy(&drv->devlist_mtx); + list_for_each_entry_safe(scan, tmp, &drv->bss_list, list) + kfree(scan); kfree(drv); } diff --git a/net/wireless/core.h b/net/wireless/core.h index f7fb9f413028..e29ad4cd464f 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -8,6 +8,8 @@ #include #include #include +#include +#include #include #include #include @@ -41,6 +43,13 @@ struct cfg80211_registered_device { struct mutex devlist_mtx; struct list_head netdev_list; + /* BSSes/scanning */ + spinlock_t bss_lock; + struct list_head bss_list; + struct rb_root bss_tree; + u32 bss_generation; + struct cfg80211_scan_request *scan_req; /* protected by RTNL */ + /* must be last because of the way we do wiphy_priv(), * and it should at least be aligned to NETDEV_ALIGN */ struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN))); @@ -56,6 +65,15 @@ struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy) extern struct mutex cfg80211_drv_mutex; extern struct list_head cfg80211_drv_list; +struct cfg80211_internal_bss { + struct list_head list; + struct rb_node rbn; + unsigned long ts; + struct kref ref; + /* must be last because of priv member */ + struct cfg80211_bss pub; +}; + /* * This function returns a pointer to the driver * that the genl_info item that is passed refers to. @@ -94,4 +112,6 @@ extern int cfg80211_dev_rename(struct cfg80211_registered_device *drv, void ieee80211_set_bitrate_flags(struct wiphy *wiphy); void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby); +void cfg80211_bss_expire(struct cfg80211_registered_device *dev); + #endif /* __NET_WIRELESS_CORE_H */ diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index d452396006ee..298a4de59948 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include "core.h" @@ -109,6 +110,8 @@ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = { [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 }, [NL80211_ATTR_IE] = { .type = NLA_BINARY, .len = IEEE80211_MAX_DATA_LEN }, + [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED }, + [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED }, }; /* message building helper */ @@ -141,6 +144,8 @@ 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)); + NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS, + dev->wiphy.max_scan_ssids); nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES); if (!nl_modes) @@ -2270,6 +2275,246 @@ static int nl80211_set_mgmt_extra_ie(struct sk_buff *skb, return err; } +static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info) +{ + struct cfg80211_registered_device *drv; + struct net_device *dev; + struct cfg80211_scan_request *request; + struct cfg80211_ssid *ssid; + struct ieee80211_channel *channel; + struct nlattr *attr; + struct wiphy *wiphy; + int err, tmp, n_ssids = 0, n_channels = 0, i; + enum ieee80211_band band; + + err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); + if (err) + return err; + + wiphy = &drv->wiphy; + + if (!drv->ops->scan) { + err = -EOPNOTSUPP; + goto out; + } + + rtnl_lock(); + + if (drv->scan_req) { + err = -EBUSY; + goto out_unlock; + } + + if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { + nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) + n_channels++; + if (!n_channels) { + err = -EINVAL; + goto out_unlock; + } + } else { + for (band = 0; band < IEEE80211_NUM_BANDS; band++) + if (wiphy->bands[band]) + n_channels += wiphy->bands[band]->n_channels; + } + + if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) + nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) + n_ssids++; + + if (n_ssids > wiphy->max_scan_ssids) { + err = -EINVAL; + goto out_unlock; + } + + request = kzalloc(sizeof(*request) + + sizeof(*ssid) * n_ssids + + sizeof(channel) * n_channels, GFP_KERNEL); + if (!request) { + err = -ENOMEM; + goto out_unlock; + } + + request->channels = (void *)((char *)request + sizeof(*request)); + request->n_channels = n_channels; + if (n_ssids) + request->ssids = (void *)(request->channels + n_channels); + request->n_ssids = n_ssids; + + if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { + /* user specified, bail out if channel not found */ + request->n_channels = n_channels; + i = 0; + nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) { + request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr)); + if (!request->channels[i]) { + err = -EINVAL; + goto out_free; + } + i++; + } + } else { + /* all channels */ + i = 0; + for (band = 0; band < IEEE80211_NUM_BANDS; band++) { + int j; + if (!wiphy->bands[band]) + continue; + for (j = 0; j < wiphy->bands[band]->n_channels; j++) { + request->channels[i] = &wiphy->bands[band]->channels[j]; + i++; + } + } + } + + i = 0; + if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) { + nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) { + if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) { + err = -EINVAL; + goto out_free; + } + memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr)); + request->ssids[i].ssid_len = nla_len(attr); + i++; + } + } + + request->ifidx = dev->ifindex; + request->wiphy = &drv->wiphy; + + drv->scan_req = request; + err = drv->ops->scan(&drv->wiphy, dev, request); + + out_free: + if (err) { + drv->scan_req = NULL; + kfree(request); + } + out_unlock: + rtnl_unlock(); + out: + cfg80211_put_dev(drv); + dev_put(dev); + return err; +} + +static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags, + struct cfg80211_registered_device *rdev, + struct net_device *dev, + struct cfg80211_bss *res) +{ + void *hdr; + struct nlattr *bss; + + hdr = nl80211hdr_put(msg, pid, seq, flags, + NL80211_CMD_NEW_SCAN_RESULTS); + if (!hdr) + return -1; + + NLA_PUT_U32(msg, NL80211_ATTR_SCAN_GENERATION, + rdev->bss_generation); + NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); + + bss = nla_nest_start(msg, NL80211_ATTR_BSS); + if (!bss) + goto nla_put_failure; + if (!is_zero_ether_addr(res->bssid)) + NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid); + if (res->information_elements && res->len_information_elements) + NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS, + res->len_information_elements, + res->information_elements); + if (res->tsf) + NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf); + if (res->beacon_interval) + NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval); + NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability); + NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq); + + switch (res->signal_type) { + case CFG80211_SIGNAL_TYPE_MBM: + NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal); + break; + case CFG80211_SIGNAL_TYPE_UNSPEC: + NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal); + break; + default: + break; + } + + nla_nest_end(msg, bss); + + return genlmsg_end(msg, hdr); + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int nl80211_dump_scan(struct sk_buff *skb, + struct netlink_callback *cb) +{ + struct cfg80211_registered_device *dev; + struct net_device *netdev; + struct cfg80211_internal_bss *scan; + int ifidx = cb->args[0]; + int start = cb->args[1], idx = 0; + int err; + + if (!ifidx) { + err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize, + nl80211_fam.attrbuf, nl80211_fam.maxattr, + nl80211_policy); + if (err) + return err; + + if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]) + return -EINVAL; + + ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]); + if (!ifidx) + return -EINVAL; + cb->args[0] = ifidx; + } + + netdev = dev_get_by_index(&init_net, ifidx); + if (!netdev) + return -ENODEV; + + dev = cfg80211_get_dev_from_ifindex(ifidx); + if (IS_ERR(dev)) { + err = PTR_ERR(dev); + goto out_put_netdev; + } + + spin_lock_bh(&dev->bss_lock); + cfg80211_bss_expire(dev); + + list_for_each_entry(scan, &dev->bss_list, list) { + if (++idx <= start) + continue; + if (nl80211_send_bss(skb, + NETLINK_CB(cb->skb).pid, + cb->nlh->nlmsg_seq, NLM_F_MULTI, + dev, netdev, &scan->pub) < 0) { + idx--; + goto out; + } + } + + out: + spin_unlock_bh(&dev->bss_lock); + + cb->args[1] = idx; + err = skb->len; + cfg80211_put_dev(dev); + out_put_netdev: + dev_put(netdev); + + return err; +} + static struct genl_ops nl80211_ops[] = { { .cmd = NL80211_CMD_GET_WIPHY, @@ -2443,12 +2688,26 @@ static struct genl_ops nl80211_ops[] = { .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, + { + .cmd = NL80211_CMD_TRIGGER_SCAN, + .doit = nl80211_trigger_scan, + .policy = nl80211_policy, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = NL80211_CMD_GET_SCAN, + .policy = nl80211_policy, + .dumpit = nl80211_dump_scan, + }, }; /* multicast groups */ static struct genl_multicast_group nl80211_config_mcgrp = { .name = "config", }; +static struct genl_multicast_group nl80211_scan_mcgrp = { + .name = "scan", +}; /* notification functions */ @@ -2468,6 +2727,66 @@ void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev) genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL); } +static int nl80211_send_scan_donemsg(struct sk_buff *msg, + struct cfg80211_registered_device *rdev, + struct net_device *netdev, + u32 pid, u32 seq, int flags, + u32 cmd) +{ + void *hdr; + + hdr = nl80211hdr_put(msg, pid, seq, flags, cmd); + if (!hdr) + return -1; + + NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->idx); + NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); + + /* XXX: we should probably bounce back the request? */ + + return genlmsg_end(msg, hdr); + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +void nl80211_send_scan_done(struct cfg80211_registered_device *rdev, + struct net_device *netdev) +{ + struct sk_buff *msg; + + msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + if (!msg) + return; + + if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0, + NL80211_CMD_NEW_SCAN_RESULTS) < 0) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL); +} + +void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev, + struct net_device *netdev) +{ + struct sk_buff *msg; + + msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + if (!msg) + return; + + if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0, + NL80211_CMD_SCAN_ABORTED) < 0) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL); +} + /* initialisation/exit functions */ int nl80211_init(void) @@ -2488,6 +2807,10 @@ int nl80211_init(void) if (err) goto err_out; + err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp); + if (err) + goto err_out; + return 0; err_out: genl_unregister_family(&nl80211_fam); diff --git a/net/wireless/nl80211.h b/net/wireless/nl80211.h index f3ea5c029aee..b565a5f84e97 100644 --- a/net/wireless/nl80211.h +++ b/net/wireless/nl80211.h @@ -7,6 +7,10 @@ extern int nl80211_init(void); extern void nl80211_exit(void); extern void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev); +extern void nl80211_send_scan_done(struct cfg80211_registered_device *rdev, + struct net_device *netdev); +extern void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev, + struct net_device *netdev); #else static inline int nl80211_init(void) { @@ -19,6 +23,10 @@ static inline void nl80211_notify_dev_rename( struct cfg80211_registered_device *rdev) { } +static inline void +nl80211_send_scan_done(struct cfg80211_registered_device *rdev, + struct net_device *netdev) +{} #endif /* CONFIG_NL80211 */ #endif /* __NET_WIRELESS_NL80211_H */ diff --git a/net/wireless/scan.c b/net/wireless/scan.c new file mode 100644 index 000000000000..009d12810c55 --- /dev/null +++ b/net/wireless/scan.c @@ -0,0 +1,807 @@ +/* + * cfg80211 scan result handling + * + * Copyright 2008 Johannes Berg + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "core.h" +#include "nl80211.h" + +#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ) + +void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted) +{ + struct net_device *dev; +#ifdef CONFIG_WIRELESS_EXT + union iwreq_data wrqu; +#endif + + dev = dev_get_by_index(&init_net, request->ifidx); + if (!dev) + goto out; + + WARN_ON(request != wiphy_to_dev(request->wiphy)->scan_req); + wiphy_to_dev(request->wiphy)->scan_req = NULL; + + if (aborted) + nl80211_send_scan_aborted(wiphy_to_dev(request->wiphy), dev); + else + nl80211_send_scan_done(wiphy_to_dev(request->wiphy), dev); + +#ifdef CONFIG_WIRELESS_EXT + if (!aborted) { + memset(&wrqu, 0, sizeof(wrqu)); + + wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); + } +#endif + + dev_put(dev); + + out: + kfree(request); +} +EXPORT_SYMBOL(cfg80211_scan_done); + +static void bss_release(struct kref *ref) +{ + struct cfg80211_internal_bss *bss; + + bss = container_of(ref, struct cfg80211_internal_bss, ref); + kfree(bss); +} + +/* must hold dev->bss_lock! */ +void cfg80211_bss_expire(struct cfg80211_registered_device *dev) +{ + struct cfg80211_internal_bss *bss, *tmp; + bool expired = false; + + list_for_each_entry_safe(bss, tmp, &dev->bss_list, list) { + if (!time_after(jiffies, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE)) + continue; + list_del(&bss->list); + rb_erase(&bss->rbn, &dev->bss_tree); + kref_put(&bss->ref, bss_release); + expired = true; + } + + if (expired) + dev->bss_generation++; +} + +static u8 *find_ie(u8 num, u8 *ies, size_t len) +{ + while (len > 2 && ies[0] != num) { + len -= ies[1] + 2; + ies += ies[1] + 2; + } + if (len < 2) + return NULL; + if (len < 2 + ies[1]) + return NULL; + return ies; +} + +static int cmp_ies(u8 num, u8 *ies1, size_t len1, u8 *ies2, size_t len2) +{ + const u8 *ie1 = find_ie(num, ies1, len1); + const u8 *ie2 = find_ie(num, ies2, len2); + int r; + + if (!ie1 && !ie2) + return 0; + if (!ie1) + return -1; + + r = memcmp(ie1 + 2, ie2 + 2, min(ie1[1], ie2[1])); + if (r == 0 && ie1[1] != ie2[1]) + return ie2[1] - ie1[1]; + return r; +} + +static bool is_bss(struct cfg80211_bss *a, + const u8 *bssid, + const u8 *ssid, size_t ssid_len) +{ + const u8 *ssidie; + + if (compare_ether_addr(a->bssid, bssid)) + return false; + + ssidie = find_ie(WLAN_EID_SSID, + a->information_elements, + a->len_information_elements); + if (!ssidie) + return false; + if (ssidie[1] != ssid_len) + return false; + return memcmp(ssidie + 2, ssid, ssid_len) == 0; +} + +static bool is_mesh(struct cfg80211_bss *a, + const u8 *meshid, size_t meshidlen, + const u8 *meshcfg) +{ + const u8 *ie; + + if (!is_zero_ether_addr(a->bssid)) + return false; + + ie = find_ie(WLAN_EID_MESH_ID, + a->information_elements, + a->len_information_elements); + if (!ie) + return false; + if (ie[1] != meshidlen) + return false; + if (memcmp(ie + 2, meshid, meshidlen)) + return false; + + ie = find_ie(WLAN_EID_MESH_CONFIG, + a->information_elements, + a->len_information_elements); + if (ie[1] != IEEE80211_MESH_CONFIG_LEN) + return false; + + /* + * Ignore mesh capability (last two bytes of the IE) when + * comparing since that may differ between stations taking + * part in the same mesh. + */ + return memcmp(ie + 2, meshcfg, IEEE80211_MESH_CONFIG_LEN - 2) == 0; +} + +static int cmp_bss(struct cfg80211_bss *a, + struct cfg80211_bss *b) +{ + int r; + + if (a->channel != b->channel) + return b->channel->center_freq - a->channel->center_freq; + + r = memcmp(a->bssid, b->bssid, ETH_ALEN); + if (r) + return r; + + if (is_zero_ether_addr(a->bssid)) { + r = cmp_ies(WLAN_EID_MESH_ID, + a->information_elements, + a->len_information_elements, + b->information_elements, + b->len_information_elements); + if (r) + return r; + return cmp_ies(WLAN_EID_MESH_CONFIG, + a->information_elements, + a->len_information_elements, + b->information_elements, + b->len_information_elements); + } + + return cmp_ies(WLAN_EID_SSID, + a->information_elements, + a->len_information_elements, + b->information_elements, + b->len_information_elements); +} + +struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy, + struct ieee80211_channel *channel, + const u8 *bssid, + const u8 *ssid, size_t ssid_len) +{ + struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); + struct cfg80211_internal_bss *bss, *res = NULL; + + spin_lock_bh(&dev->bss_lock); + + list_for_each_entry(bss, &dev->bss_list, list) { + if (channel && bss->pub.channel != channel) + continue; + if (is_bss(&bss->pub, bssid, ssid, ssid_len)) { + res = bss; + kref_get(&res->ref); + break; + } + } + + spin_unlock_bh(&dev->bss_lock); + if (!res) + return NULL; + return &res->pub; +} +EXPORT_SYMBOL(cfg80211_get_bss); + +struct cfg80211_bss *cfg80211_get_mesh(struct wiphy *wiphy, + struct ieee80211_channel *channel, + const u8 *meshid, size_t meshidlen, + const u8 *meshcfg) +{ + struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); + struct cfg80211_internal_bss *bss, *res = NULL; + + spin_lock_bh(&dev->bss_lock); + + list_for_each_entry(bss, &dev->bss_list, list) { + if (channel && bss->pub.channel != channel) + continue; + if (is_mesh(&bss->pub, meshid, meshidlen, meshcfg)) { + res = bss; + kref_get(&res->ref); + break; + } + } + + spin_unlock_bh(&dev->bss_lock); + if (!res) + return NULL; + return &res->pub; +} +EXPORT_SYMBOL(cfg80211_get_mesh); + + +static void rb_insert_bss(struct cfg80211_registered_device *dev, + struct cfg80211_internal_bss *bss) +{ + struct rb_node **p = &dev->bss_tree.rb_node; + struct rb_node *parent = NULL; + struct cfg80211_internal_bss *tbss; + int cmp; + + while (*p) { + parent = *p; + tbss = rb_entry(parent, struct cfg80211_internal_bss, rbn); + + cmp = cmp_bss(&bss->pub, &tbss->pub); + + if (WARN_ON(!cmp)) { + /* will sort of leak this BSS */ + return; + } + + if (cmp < 0) + p = &(*p)->rb_left; + else + p = &(*p)->rb_right; + } + + rb_link_node(&bss->rbn, parent, p); + rb_insert_color(&bss->rbn, &dev->bss_tree); +} + +static struct cfg80211_internal_bss * +rb_find_bss(struct cfg80211_registered_device *dev, + struct cfg80211_internal_bss *res) +{ + struct rb_node *n = dev->bss_tree.rb_node; + struct cfg80211_internal_bss *bss; + int r; + + while (n) { + bss = rb_entry(n, struct cfg80211_internal_bss, rbn); + r = cmp_bss(&res->pub, &bss->pub); + + if (r == 0) + return bss; + else if (r < 0) + n = n->rb_left; + else + n = n->rb_right; + } + + return NULL; +} + +static struct cfg80211_internal_bss * +cfg80211_bss_update(struct cfg80211_registered_device *dev, + struct cfg80211_internal_bss *res, + bool overwrite) +{ + struct cfg80211_internal_bss *found = NULL; + const u8 *meshid, *meshcfg; + + /* + * The reference to "res" is donated to this function. + */ + + if (WARN_ON(!res->pub.channel)) { + kref_put(&res->ref, bss_release); + return NULL; + } + + res->ts = jiffies; + + if (is_zero_ether_addr(res->pub.bssid)) { + /* must be mesh, verify */ + meshid = find_ie(WLAN_EID_MESH_ID, res->pub.information_elements, + res->pub.len_information_elements); + meshcfg = find_ie(WLAN_EID_MESH_CONFIG, + res->pub.information_elements, + res->pub.len_information_elements); + if (!meshid || !meshcfg || + meshcfg[1] != IEEE80211_MESH_CONFIG_LEN) { + /* bogus mesh */ + kref_put(&res->ref, bss_release); + return NULL; + } + } + + spin_lock_bh(&dev->bss_lock); + + found = rb_find_bss(dev, res); + + if (found && overwrite) { + list_replace(&found->list, &res->list); + rb_replace_node(&found->rbn, &res->rbn, + &dev->bss_tree); + kref_put(&found->ref, bss_release); + found = res; + } else if (found) { + kref_get(&found->ref); + found->pub.beacon_interval = res->pub.beacon_interval; + found->pub.tsf = res->pub.tsf; + found->pub.signal = res->pub.signal; + found->pub.signal_type = res->pub.signal_type; + found->pub.capability = res->pub.capability; + found->ts = res->ts; + kref_put(&res->ref, bss_release); + } else { + /* this "consumes" the reference */ + list_add_tail(&res->list, &dev->bss_list); + rb_insert_bss(dev, res); + found = res; + } + + dev->bss_generation++; + spin_unlock_bh(&dev->bss_lock); + + kref_get(&found->ref); + return found; +} + +struct cfg80211_bss * +cfg80211_inform_bss_frame(struct wiphy *wiphy, + struct ieee80211_channel *channel, + struct ieee80211_mgmt *mgmt, size_t len, + s32 signal, enum cfg80211_signal_type sigtype, + gfp_t gfp) +{ + struct cfg80211_internal_bss *res; + size_t ielen = len - offsetof(struct ieee80211_mgmt, + u.probe_resp.variable); + bool overwrite; + size_t privsz = wiphy->bss_priv_size; + + if (WARN_ON(sigtype == NL80211_BSS_SIGNAL_UNSPEC && + (signal < 0 || signal > 100))) + return NULL; + + if (WARN_ON(!mgmt || !wiphy || + len < offsetof(struct ieee80211_mgmt, u.probe_resp.variable))) + return NULL; + + res = kzalloc(sizeof(*res) + privsz + ielen, gfp); + if (!res) + return NULL; + + memcpy(res->pub.bssid, mgmt->bssid, ETH_ALEN); + res->pub.channel = channel; + res->pub.signal_type = sigtype; + res->pub.signal = signal; + res->pub.tsf = le64_to_cpu(mgmt->u.probe_resp.timestamp); + res->pub.beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int); + res->pub.capability = le16_to_cpu(mgmt->u.probe_resp.capab_info); + /* point to after the private area */ + res->pub.information_elements = (u8 *)res + sizeof(*res) + privsz; + memcpy(res->pub.information_elements, mgmt->u.probe_resp.variable, ielen); + res->pub.len_information_elements = ielen; + + kref_init(&res->ref); + + overwrite = ieee80211_is_probe_resp(mgmt->frame_control); + + res = cfg80211_bss_update(wiphy_to_dev(wiphy), res, overwrite); + if (!res) + return NULL; + + /* cfg80211_bss_update gives us a referenced result */ + return &res->pub; +} +EXPORT_SYMBOL(cfg80211_inform_bss_frame); + +void cfg80211_put_bss(struct cfg80211_bss *pub) +{ + struct cfg80211_internal_bss *bss; + + if (!pub) + return; + + bss = container_of(pub, struct cfg80211_internal_bss, pub); + kref_put(&bss->ref, bss_release); +} +EXPORT_SYMBOL(cfg80211_put_bss); + +#ifdef CONFIG_WIRELESS_EXT +int cfg80211_wext_siwscan(struct net_device *dev, + struct iw_request_info *info, + union iwreq_data *wrqu, char *extra) +{ + struct cfg80211_registered_device *rdev; + struct wiphy *wiphy; + struct iw_scan_req *wreq = NULL; + struct cfg80211_scan_request *creq; + int i, err, n_channels = 0; + enum ieee80211_band band; + + if (!netif_running(dev)) + return -ENETDOWN; + + rdev = cfg80211_get_dev_from_ifindex(dev->ifindex); + + if (IS_ERR(rdev)) + return PTR_ERR(rdev); + + if (rdev->scan_req) { + err = -EBUSY; + goto out; + } + + wiphy = &rdev->wiphy; + + for (band = 0; band < IEEE80211_NUM_BANDS; band++) + if (wiphy->bands[band]) + n_channels += wiphy->bands[band]->n_channels; + + creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) + + n_channels * sizeof(void *), + GFP_ATOMIC); + if (!creq) { + err = -ENOMEM; + goto out; + } + + creq->wiphy = wiphy; + creq->ifidx = dev->ifindex; + creq->ssids = (void *)(creq + 1); + creq->channels = (void *)(creq->ssids + 1); + creq->n_channels = n_channels; + creq->n_ssids = 1; + + /* all channels */ + i = 0; + for (band = 0; band < IEEE80211_NUM_BANDS; band++) { + int j; + if (!wiphy->bands[band]) + continue; + for (j = 0; j < wiphy->bands[band]->n_channels; j++) { + creq->channels[i] = &wiphy->bands[band]->channels[j]; + i++; + } + } + + /* translate scan request */ + if (wrqu->data.length == sizeof(struct iw_scan_req)) { + wreq = (struct iw_scan_req *)extra; + + if (wrqu->data.flags & IW_SCAN_THIS_ESSID) { + if (wreq->essid_len > IEEE80211_MAX_SSID_LEN) + return -EINVAL; + memcpy(creq->ssids[0].ssid, wreq->essid, wreq->essid_len); + creq->ssids[0].ssid_len = wreq->essid_len; + } + if (wreq->scan_type == IW_SCAN_TYPE_PASSIVE) + creq->n_ssids = 0; + } + + rdev->scan_req = creq; + err = rdev->ops->scan(wiphy, dev, creq); + if (err) { + rdev->scan_req = NULL; + kfree(creq); + } + out: + cfg80211_put_dev(rdev); + return err; +} +EXPORT_SYMBOL(cfg80211_wext_siwscan); + +static void ieee80211_scan_add_ies(struct iw_request_info *info, + struct cfg80211_bss *bss, + char **current_ev, char *end_buf) +{ + u8 *pos, *end, *next; + struct iw_event iwe; + + if (!bss->information_elements || + !bss->len_information_elements) + return; + + /* + * If needed, fragment the IEs buffer (at IE boundaries) into short + * enough fragments to fit into IW_GENERIC_IE_MAX octet messages. + */ + pos = bss->information_elements; + end = pos + bss->len_information_elements; + + while (end - pos > IW_GENERIC_IE_MAX) { + next = pos + 2 + pos[1]; + while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX) + next = next + 2 + next[1]; + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = IWEVGENIE; + iwe.u.data.length = next - pos; + *current_ev = iwe_stream_add_point(info, *current_ev, + end_buf, &iwe, pos); + + pos = next; + } + + if (end > pos) { + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = IWEVGENIE; + iwe.u.data.length = end - pos; + *current_ev = iwe_stream_add_point(info, *current_ev, + end_buf, &iwe, pos); + } +} + + +static char * +ieee80211_bss(struct iw_request_info *info, + struct cfg80211_internal_bss *bss, + char *current_ev, char *end_buf) +{ + struct iw_event iwe; + u8 *buf, *cfg, *p; + u8 *ie = bss->pub.information_elements; + int rem = bss->pub.len_information_elements, i; + bool ismesh = false; + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = SIOCGIWAP; + iwe.u.ap_addr.sa_family = ARPHRD_ETHER; + memcpy(iwe.u.ap_addr.sa_data, bss->pub.bssid, ETH_ALEN); + current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, + IW_EV_ADDR_LEN); + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = SIOCGIWFREQ; + iwe.u.freq.m = ieee80211_frequency_to_channel(bss->pub.channel->center_freq); + iwe.u.freq.e = 0; + current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, + IW_EV_FREQ_LEN); + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = SIOCGIWFREQ; + iwe.u.freq.m = bss->pub.channel->center_freq; + iwe.u.freq.e = 6; + current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, + IW_EV_FREQ_LEN); + + if (bss->pub.signal_type != CFG80211_SIGNAL_TYPE_NONE) { + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = IWEVQUAL; + iwe.u.qual.updated = IW_QUAL_LEVEL_UPDATED | + IW_QUAL_NOISE_INVALID | + IW_QUAL_QUAL_INVALID; + switch (bss->pub.signal_type) { + case CFG80211_SIGNAL_TYPE_MBM: + iwe.u.qual.level = bss->pub.signal / 100; + iwe.u.qual.updated |= IW_QUAL_DBM; + break; + case CFG80211_SIGNAL_TYPE_UNSPEC: + iwe.u.qual.level = bss->pub.signal; + break; + default: + /* not reached */ + break; + } + current_ev = iwe_stream_add_event(info, current_ev, end_buf, + &iwe, IW_EV_QUAL_LEN); + } + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = SIOCGIWENCODE; + if (bss->pub.capability & WLAN_CAPABILITY_PRIVACY) + iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; + else + iwe.u.data.flags = IW_ENCODE_DISABLED; + iwe.u.data.length = 0; + current_ev = iwe_stream_add_point(info, current_ev, end_buf, + &iwe, ""); + + while (rem >= 2) { + /* invalid data */ + if (ie[1] > rem - 2) + break; + + switch (ie[0]) { + case WLAN_EID_SSID: + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = SIOCGIWESSID; + iwe.u.data.length = ie[1]; + iwe.u.data.flags = 1; + current_ev = iwe_stream_add_point(info, current_ev, end_buf, + &iwe, ie + 2); + break; + case WLAN_EID_MESH_ID: + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = SIOCGIWESSID; + iwe.u.data.length = ie[1]; + iwe.u.data.flags = 1; + current_ev = iwe_stream_add_point(info, current_ev, end_buf, + &iwe, ie + 2); + break; + case WLAN_EID_MESH_CONFIG: + ismesh = true; + if (ie[1] != IEEE80211_MESH_CONFIG_LEN) + break; + buf = kmalloc(50, GFP_ATOMIC); + if (!buf) + break; + cfg = ie + 2; + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = IWEVCUSTOM; + sprintf(buf, "Mesh network (version %d)", cfg[0]); + iwe.u.data.length = strlen(buf); + current_ev = iwe_stream_add_point(info, current_ev, + end_buf, + &iwe, buf); + sprintf(buf, "Path Selection Protocol ID: " + "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3], + cfg[4]); + iwe.u.data.length = strlen(buf); + current_ev = iwe_stream_add_point(info, current_ev, + end_buf, + &iwe, buf); + sprintf(buf, "Path Selection Metric ID: " + "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7], + cfg[8]); + iwe.u.data.length = strlen(buf); + current_ev = iwe_stream_add_point(info, current_ev, + end_buf, + &iwe, buf); + sprintf(buf, "Congestion Control Mode ID: " + "0x%02X%02X%02X%02X", cfg[9], cfg[10], + cfg[11], cfg[12]); + iwe.u.data.length = strlen(buf); + current_ev = iwe_stream_add_point(info, current_ev, + end_buf, + &iwe, buf); + sprintf(buf, "Channel Precedence: " + "0x%02X%02X%02X%02X", cfg[13], cfg[14], + cfg[15], cfg[16]); + iwe.u.data.length = strlen(buf); + current_ev = iwe_stream_add_point(info, current_ev, + end_buf, + &iwe, buf); + kfree(buf); + break; + case WLAN_EID_SUPP_RATES: + case WLAN_EID_EXT_SUPP_RATES: + /* display all supported rates in readable format */ + p = current_ev + iwe_stream_lcp_len(info); + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = SIOCGIWRATE; + /* Those two flags are ignored... */ + iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; + + for (i = 0; i < ie[1]; i++) { + iwe.u.bitrate.value = + ((ie[i + 2] & 0x7f) * 500000); + p = iwe_stream_add_value(info, current_ev, p, + end_buf, &iwe, IW_EV_PARAM_LEN); + } + current_ev = p; + break; + } + rem -= ie[1] + 2; + ie += ie[1] + 2; + } + + if (bss->pub.capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) + || ismesh) { + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = SIOCGIWMODE; + if (ismesh) + iwe.u.mode = IW_MODE_MESH; + else if (bss->pub.capability & WLAN_CAPABILITY_ESS) + iwe.u.mode = IW_MODE_MASTER; + else + iwe.u.mode = IW_MODE_ADHOC; + current_ev = iwe_stream_add_event(info, current_ev, end_buf, + &iwe, IW_EV_UINT_LEN); + } + + buf = kmalloc(30, GFP_ATOMIC); + if (buf) { + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = IWEVCUSTOM; + sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->pub.tsf)); + iwe.u.data.length = strlen(buf); + current_ev = iwe_stream_add_point(info, current_ev, end_buf, + &iwe, buf); + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = IWEVCUSTOM; + sprintf(buf, " Last beacon: %dms ago", + jiffies_to_msecs(jiffies - bss->ts)); + iwe.u.data.length = strlen(buf); + current_ev = iwe_stream_add_point(info, current_ev, + end_buf, &iwe, buf); + kfree(buf); + } + + ieee80211_scan_add_ies(info, &bss->pub, ¤t_ev, end_buf); + + return current_ev; +} + + +static int ieee80211_scan_results(struct cfg80211_registered_device *dev, + struct iw_request_info *info, + char *buf, size_t len) +{ + char *current_ev = buf; + char *end_buf = buf + len; + struct cfg80211_internal_bss *bss; + + spin_lock_bh(&dev->bss_lock); + cfg80211_bss_expire(dev); + + list_for_each_entry(bss, &dev->bss_list, list) { + if (buf + len - current_ev <= IW_EV_ADDR_LEN) { + spin_unlock_bh(&dev->bss_lock); + return -E2BIG; + } + current_ev = ieee80211_bss(info, bss, + current_ev, end_buf); + } + spin_unlock_bh(&dev->bss_lock); + return current_ev - buf; +} + + +int cfg80211_wext_giwscan(struct net_device *dev, + struct iw_request_info *info, + struct iw_point *data, char *extra) +{ + struct cfg80211_registered_device *rdev; + int res; + + if (!netif_running(dev)) + return -ENETDOWN; + + rdev = cfg80211_get_dev_from_ifindex(dev->ifindex); + + if (IS_ERR(rdev)) + return PTR_ERR(rdev); + + if (rdev->scan_req) { + res = -EAGAIN; + goto out; + } + + res = ieee80211_scan_results(rdev, info, extra, data->length); + data->length = 0; + if (res >= 0) { + data->length = res; + res = 0; + } + + out: + cfg80211_put_dev(rdev); + return res; +} +EXPORT_SYMBOL(cfg80211_wext_giwscan); +#endif -- cgit v1.2.3-59-g8ed1b From 77965c970d7da9c9b6349ff2b1d9adecf54c403b Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 18 Feb 2009 18:45:06 +0100 Subject: cfg80211: clean up signal type It wasn't a good idea to make the signal type a per-BSS option, although then it is closer to the actual value. Move it to be a per-wiphy setting, update mac80211 to match. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- include/net/cfg80211.h | 8 +++----- include/net/wireless.h | 3 +++ net/mac80211/main.c | 5 +++++ net/mac80211/scan.c | 11 +++-------- net/wireless/nl80211.c | 2 +- net/wireless/scan.c | 21 +++++++++------------ 6 files changed, 24 insertions(+), 26 deletions(-) (limited to 'include/net/wireless.h') diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 8dcc46444037..e0312746a8cc 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -577,8 +577,7 @@ enum cfg80211_signal_type { * @information_elements: the information elements (Note that there * is no guarantee that these are well-formed!) * @len_information_elements: total length of the information elements - * @signal: signal strength value - * @signal_type: signal type + * @signal: signal strength value (type depends on the wiphy's signal_type) * @free_priv: function pointer to free private data * @priv: private area for driver use, has at least wiphy->bss_priv_size bytes */ @@ -593,7 +592,6 @@ struct cfg80211_bss { size_t len_information_elements; s32 signal; - enum cfg80211_signal_type signal_type; void (*free_priv)(struct cfg80211_bss *bss); u8 priv[0] __attribute__((__aligned__(sizeof(void *)))); @@ -782,6 +780,7 @@ void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted); * * @wiphy: the wiphy reporting the BSS * @bss: the found BSS + * @signal: the signal strength, type depends on the wiphy's signal_type * @gfp: context flags * * This informs cfg80211 that BSS information was found and @@ -791,8 +790,7 @@ struct cfg80211_bss* cfg80211_inform_bss_frame(struct wiphy *wiphy, struct ieee80211_channel *channel, struct ieee80211_mgmt *mgmt, size_t len, - s32 signal, enum cfg80211_signal_type sigtype, - gfp_t gfp); + s32 signal, gfp_t gfp); struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy, struct ieee80211_channel *channel, diff --git a/include/net/wireless.h b/include/net/wireless.h index 1c6285eb1666..d815aa8b4534 100644 --- a/include/net/wireless.h +++ b/include/net/wireless.h @@ -200,6 +200,7 @@ struct ieee80211_supported_band { * the regulatory_hint() API. This can be used by the driver * on the reg_notifier() if it chooses to ignore future * regulatory domain changes caused by other drivers. + * @signal_type: signal type reported in &struct cfg80211_bss. */ struct wiphy { /* assign these fields before you register the wiphy */ @@ -213,6 +214,8 @@ struct wiphy { bool custom_regulatory; bool strict_regulatory; + enum cfg80211_signal_type signal_type; + int bss_priv_size; u8 max_scan_ssids; diff --git a/net/mac80211/main.c b/net/mac80211/main.c index fce9d08986e9..f38db4d37e5d 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -861,6 +861,11 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) /* mac80211 always supports monitor */ local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); + if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) + local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; + else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) + local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; + result = wiphy_register(local->hw.wiphy); if (result < 0) goto fail_wiphy_register; diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index c063f8204263..23f4de274744 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -63,20 +63,15 @@ ieee80211_bss_info_update(struct ieee80211_local *local, { struct ieee80211_bss *bss; int clen; - enum cfg80211_signal_type sigtype = CFG80211_SIGNAL_TYPE_NONE; s32 signal = 0; - if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) { - sigtype = CFG80211_SIGNAL_TYPE_MBM; + if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) signal = rx_status->signal * 100; - } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) { - sigtype = CFG80211_SIGNAL_TYPE_UNSPEC; + else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) signal = (rx_status->signal * 100) / local->hw.max_signal; - } bss = (void *)cfg80211_inform_bss_frame(local->hw.wiphy, channel, - mgmt, len, signal, sigtype, - GFP_ATOMIC); + mgmt, len, signal, GFP_ATOMIC); if (!bss) return NULL; diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 245fddcc77c3..a7e751edc739 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -2457,7 +2457,7 @@ static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags, NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability); NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq); - switch (res->signal_type) { + switch (rdev->wiphy.signal_type) { case CFG80211_SIGNAL_TYPE_MBM: NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal); break; diff --git a/net/wireless/scan.c b/net/wireless/scan.c index 01c136d98c5b..60600657b657 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -370,7 +370,6 @@ cfg80211_bss_update(struct cfg80211_registered_device *dev, found->pub.beacon_interval = res->pub.beacon_interval; found->pub.tsf = res->pub.tsf; found->pub.signal = res->pub.signal; - found->pub.signal_type = res->pub.signal_type; found->pub.capability = res->pub.capability; found->ts = res->ts; kref_put(&res->ref, bss_release); @@ -392,8 +391,7 @@ struct cfg80211_bss * cfg80211_inform_bss_frame(struct wiphy *wiphy, struct ieee80211_channel *channel, struct ieee80211_mgmt *mgmt, size_t len, - s32 signal, enum cfg80211_signal_type sigtype, - gfp_t gfp) + s32 signal, gfp_t gfp) { struct cfg80211_internal_bss *res; size_t ielen = len - offsetof(struct ieee80211_mgmt, @@ -401,7 +399,7 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy, bool overwrite; size_t privsz = wiphy->bss_priv_size; - if (WARN_ON(sigtype == NL80211_BSS_SIGNAL_UNSPEC && + if (WARN_ON(wiphy->signal_type == NL80211_BSS_SIGNAL_UNSPEC && (signal < 0 || signal > 100))) return NULL; @@ -415,7 +413,6 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy, memcpy(res->pub.bssid, mgmt->bssid, ETH_ALEN); res->pub.channel = channel; - res->pub.signal_type = sigtype; res->pub.signal = signal; res->pub.tsf = le64_to_cpu(mgmt->u.probe_resp.timestamp); res->pub.beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int); @@ -607,9 +604,9 @@ static inline unsigned int elapsed_jiffies_msecs(unsigned long start) } static char * -ieee80211_bss(struct iw_request_info *info, - struct cfg80211_internal_bss *bss, - char *current_ev, char *end_buf) +ieee80211_bss(struct wiphy *wiphy, struct iw_request_info *info, + struct cfg80211_internal_bss *bss, char *current_ev, + char *end_buf) { struct iw_event iwe; u8 *buf, *cfg, *p; @@ -638,13 +635,13 @@ ieee80211_bss(struct iw_request_info *info, current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, IW_EV_FREQ_LEN); - if (bss->pub.signal_type != CFG80211_SIGNAL_TYPE_NONE) { + if (wiphy->signal_type != CFG80211_SIGNAL_TYPE_NONE) { memset(&iwe, 0, sizeof(iwe)); iwe.cmd = IWEVQUAL; iwe.u.qual.updated = IW_QUAL_LEVEL_UPDATED | IW_QUAL_NOISE_INVALID | IW_QUAL_QUAL_UPDATED; - switch (bss->pub.signal_type) { + switch (wiphy->signal_type) { case CFG80211_SIGNAL_TYPE_MBM: sig = bss->pub.signal / 100; iwe.u.qual.level = sig; @@ -823,8 +820,8 @@ static int ieee80211_scan_results(struct cfg80211_registered_device *dev, spin_unlock_bh(&dev->bss_lock); return -E2BIG; } - current_ev = ieee80211_bss(info, bss, - current_ev, end_buf); + current_ev = ieee80211_bss(&dev->wiphy, info, bss, + current_ev, end_buf); } spin_unlock_bh(&dev->bss_lock); return current_ev - buf; -- cgit v1.2.3-59-g8ed1b From fe33eb390854886e1fd5d4835d833b80d145aafb Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Sat, 21 Feb 2009 00:04:30 -0500 Subject: cfg80211: move all regulatory hints to workqueue All regulatory hints (core, driver, userspace and 11d) are now processed in a workqueue. Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- drivers/net/wireless/ath9k/main.c | 8 +- drivers/net/wireless/zd1211rw/zd_mac.c | 6 +- include/net/cfg80211.h | 2 + include/net/wireless.h | 9 +- net/wireless/nl80211.c | 30 ++---- net/wireless/reg.c | 178 ++++++++++++++++++++++++++++++--- net/wireless/reg.h | 2 + 7 files changed, 194 insertions(+), 41 deletions(-) (limited to 'include/net/wireless.h') diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c index b47cbe9e7a5a..1e3824215ac9 100644 --- a/drivers/net/wireless/ath9k/main.c +++ b/drivers/net/wireless/ath9k/main.c @@ -1656,8 +1656,12 @@ int ath_attach(u16 devid, struct ath_softc *sc) error = ieee80211_register_hw(hw); - if (!ath9k_is_world_regd(sc->sc_ah)) - regulatory_hint(hw->wiphy, sc->sc_ah->regulatory.alpha2); + if (!ath9k_is_world_regd(sc->sc_ah)) { + error = regulatory_hint(hw->wiphy, + sc->sc_ah->regulatory.alpha2); + if (error) + goto error_attach; + } /* Initialize LED control */ ath_init_leds(sc); diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c index 7579af27edbd..da9214e33a5f 100644 --- a/drivers/net/wireless/zd1211rw/zd_mac.c +++ b/drivers/net/wireless/zd1211rw/zd_mac.c @@ -170,10 +170,10 @@ int zd_mac_init_hw(struct ieee80211_hw *hw) goto disable_int; r = zd_reg2alpha2(mac->regdomain, alpha2); - if (!r) - regulatory_hint(hw->wiphy, alpha2); + if (r) + goto disable_int; - r = 0; + r = regulatory_hint(hw->wiphy, alpha2); disable_int: zd_chip_disable_int(chip); out: diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index bb9129fc61ca..75fa556728ce 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -404,6 +404,7 @@ enum environment_cap { * country IE * @country_ie_env: lets us know if the AP is telling us we are outdoor, * indoor, or if it doesn't matter + * @list: used to insert into the reg_requests_list linked list */ struct regulatory_request { int wiphy_idx; @@ -412,6 +413,7 @@ struct regulatory_request { bool intersect; u32 country_ie_checksum; enum environment_cap country_ie_env; + struct list_head list; }; struct ieee80211_freq_range { diff --git a/include/net/wireless.h b/include/net/wireless.h index d815aa8b4534..1f4707d18adb 100644 --- a/include/net/wireless.h +++ b/include/net/wireless.h @@ -401,8 +401,15 @@ ieee80211_get_response_rate(struct ieee80211_supported_band *sband, * domain should be in or by providing a completely build regulatory domain. * If the driver provides an ISO/IEC 3166 alpha2 userspace will be queried * for a regulatory domain structure for the respective country. + * + * The wiphy must have been registered to cfg80211 prior to this call. + * For cfg80211 drivers this means you must first use wiphy_register(), + * for mac80211 drivers you must first use ieee80211_register_hw(). + * + * Drivers should check the return value, its possible you can get + * an -ENOMEM. */ -extern void regulatory_hint(struct wiphy *wiphy, const char *alpha2); +extern int regulatory_hint(struct wiphy *wiphy, const char *alpha2); /** * regulatory_hint_11d - hints a country IE as a regulatory domain diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index e0d3879b8852..97f69bed3fe2 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -1915,34 +1915,24 @@ static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info) */ mutex_lock(&cfg80211_mutex); if (unlikely(!cfg80211_regdomain)) { - r = -EINPROGRESS; - goto out; + mutex_unlock(&cfg80211_mutex); + return -EINPROGRESS; } + mutex_unlock(&cfg80211_mutex); - if (!info->attrs[NL80211_ATTR_REG_ALPHA2]) { - r = -EINVAL; - goto out; - } + 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)) { - r = -EINVAL; - goto out; - } + if (is_world_regdom(data)) + return -EINVAL; #endif - r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data, 0, ENVIRON_ANY); - /* - * This means the regulatory domain was already set, however - * we don't want to confuse userspace with a "successful error" - * message so lets just treat it as a success - */ - if (r == -EALREADY) - r = 0; -out: - mutex_unlock(&cfg80211_mutex); + + r = regulatory_hint_user(data); + return r; } diff --git a/net/wireless/reg.c b/net/wireless/reg.c index af762be3f0a1..0b8c4b86789a 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -64,6 +64,9 @@ const struct ieee80211_regdomain *cfg80211_regdomain; * what it thinks should apply for the same country */ static const struct ieee80211_regdomain *country_ie_regdomain; +static LIST_HEAD(reg_requests_list); +static spinlock_t reg_requests_lock; + /* 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, @@ -831,7 +834,7 @@ static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, const struct ieee80211_power_rule *power_rule = NULL; struct ieee80211_supported_band *sband; struct ieee80211_channel *chan; - struct wiphy *request_wiphy; + struct wiphy *request_wiphy = NULL; assert_cfg80211_lock(); @@ -1195,6 +1198,89 @@ new_request: return call_crda(alpha2); } +/* This currently only processes user and driver regulatory hints */ +static int reg_process_hint(struct regulatory_request *reg_request) +{ + int r = 0; + struct wiphy *wiphy = NULL; + + BUG_ON(!reg_request->alpha2); + + mutex_lock(&cfg80211_mutex); + + if (wiphy_idx_valid(reg_request->wiphy_idx)) + wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); + + if (reg_request->initiator == REGDOM_SET_BY_DRIVER && + !wiphy) { + r = -ENODEV; + goto out; + } + + r = __regulatory_hint(wiphy, + reg_request->initiator, + reg_request->alpha2, + reg_request->country_ie_checksum, + reg_request->country_ie_env); + /* This is required so that the orig_* parameters are saved */ + if (r == -EALREADY && wiphy && wiphy->strict_regulatory) + wiphy_update_regulatory(wiphy, reg_request->initiator); +out: + mutex_unlock(&cfg80211_mutex); + + if (r == -EALREADY) + r = 0; + + return r; +} + +static void reg_process_pending_hints(void) + { + struct regulatory_request *reg_request; + int r; + + spin_lock(®_requests_lock); + while (!list_empty(®_requests_list)) { + reg_request = list_first_entry(®_requests_list, + struct regulatory_request, + list); + list_del_init(®_request->list); + spin_unlock(®_requests_lock); + + r = reg_process_hint(reg_request); +#ifdef CONFIG_CFG80211_REG_DEBUG + if (r && (reg_request->initiator == REGDOM_SET_BY_DRIVER || + reg_request->initiator == REGDOM_SET_BY_COUNTRY_IE)) + printk(KERN_ERR "cfg80211: wiphy_idx %d sent a " + "regulatory hint for %c%c but now has " + "gone fishing, ignoring request\n", + reg_request->wiphy_idx, + reg_request->alpha2[0], + reg_request->alpha2[1]); +#endif + kfree(reg_request); + spin_lock(®_requests_lock); + } + spin_unlock(®_requests_lock); +} + +static void reg_todo(struct work_struct *work) +{ + reg_process_pending_hints(); +} + +static DECLARE_WORK(reg_work, reg_todo); + +static void queue_regulatory_request(struct regulatory_request *request) +{ + spin_lock(®_requests_lock); + list_add_tail(&request->list, ®_requests_list); + spin_unlock(®_requests_lock); + + schedule_work(®_work); +} + +/* Core regulatory hint -- happens once during cfg80211_init() */ static int regulatory_hint_core(const char *alpha2) { struct regulatory_request *request; @@ -1210,23 +1296,56 @@ static int regulatory_hint_core(const char *alpha2) request->alpha2[1] = alpha2[1]; request->initiator = REGDOM_SET_BY_CORE; - last_request = request; + queue_regulatory_request(request); - return call_crda(alpha2); + return 0; } -void regulatory_hint(struct wiphy *wiphy, const char *alpha2) +/* User hints */ +int regulatory_hint_user(const char *alpha2) { - int r; + struct regulatory_request *request; + BUG_ON(!alpha2); - mutex_lock(&cfg80211_mutex); - r = __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, - alpha2, 0, ENVIRON_ANY); - /* This is required so that the orig_* parameters are saved */ - if (r == -EALREADY && wiphy->strict_regulatory) - wiphy_update_regulatory(wiphy, REGDOM_SET_BY_DRIVER); - mutex_unlock(&cfg80211_mutex); + request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); + if (!request) + return -ENOMEM; + + request->wiphy_idx = WIPHY_IDX_STALE; + request->alpha2[0] = alpha2[0]; + request->alpha2[1] = alpha2[1]; + request->initiator = REGDOM_SET_BY_USER, + + queue_regulatory_request(request); + + return 0; +} + +/* Driver hints */ +int regulatory_hint(struct wiphy *wiphy, const char *alpha2) +{ + struct regulatory_request *request; + + BUG_ON(!alpha2); + BUG_ON(!wiphy); + + request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); + if (!request) + return -ENOMEM; + + request->wiphy_idx = get_wiphy_idx(wiphy); + + /* Must have registered wiphy first */ + BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); + + request->alpha2[0] = alpha2[0]; + request->alpha2[1] = alpha2[1]; + request->initiator = REGDOM_SET_BY_DRIVER; + + queue_regulatory_request(request); + + return 0; } EXPORT_SYMBOL(regulatory_hint); @@ -1260,6 +1379,7 @@ void regulatory_hint_11d(struct wiphy *wiphy, char alpha2[2]; u32 checksum = 0; enum environment_cap env = ENVIRON_ANY; + struct regulatory_request *request; mutex_lock(&cfg80211_mutex); @@ -1343,14 +1463,26 @@ void regulatory_hint_11d(struct wiphy *wiphy, if (WARN_ON(reg_same_country_ie_hint(wiphy, checksum))) goto free_rd_out; + request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); + if (!request) + goto free_rd_out; + /* We keep this around for when CRDA comes back with a response so * we can intersect with that */ country_ie_regdomain = rd; - __regulatory_hint(wiphy, REGDOM_SET_BY_COUNTRY_IE, - country_ie_regdomain->alpha2, checksum, env); + request->wiphy_idx = get_wiphy_idx(wiphy); + request->alpha2[0] = rd->alpha2[0]; + request->alpha2[1] = rd->alpha2[1]; + request->initiator = REGDOM_SET_BY_COUNTRY_IE; + request->country_ie_checksum = checksum; + request->country_ie_env = env; + + mutex_unlock(&cfg80211_mutex); - goto out; + queue_regulatory_request(request); + + return; free_rd_out: kfree(rd); @@ -1661,6 +1793,8 @@ int regulatory_init(void) if (IS_ERR(reg_pdev)) return PTR_ERR(reg_pdev); + spin_lock_init(®_requests_lock); + #ifdef CONFIG_WIRELESS_OLD_REGULATORY cfg80211_regdomain = static_regdom(ieee80211_regdom); @@ -1700,6 +1834,10 @@ int regulatory_init(void) void regulatory_exit(void) { + struct regulatory_request *reg_request, *tmp; + + cancel_work_sync(®_work); + mutex_lock(&cfg80211_mutex); reset_regdomains(); @@ -1711,5 +1849,15 @@ void regulatory_exit(void) platform_device_unregister(reg_pdev); + spin_lock(®_requests_lock); + if (!list_empty(®_requests_list)) { + list_for_each_entry_safe(reg_request, tmp, + ®_requests_list, list) { + list_del(®_request->list); + kfree(reg_request); + } + } + spin_unlock(®_requests_lock); + mutex_unlock(&cfg80211_mutex); } diff --git a/net/wireless/reg.h b/net/wireless/reg.h index fe8c83f34fb7..4730def5a69d 100644 --- a/net/wireless/reg.h +++ b/net/wireless/reg.h @@ -6,6 +6,8 @@ extern const struct ieee80211_regdomain *cfg80211_regdomain; bool is_world_regdom(const char *alpha2); bool reg_is_valid_request(const char *alpha2); +int regulatory_hint_user(const char *alpha2); + void reg_device_remove(struct wiphy *wiphy); int regulatory_init(void); -- cgit v1.2.3-59-g8ed1b From e38f8a7a8bebbab9d97f204e2cf05ef58b048a1d Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Sat, 21 Feb 2009 00:20:39 -0500 Subject: cfg80211: Add AP beacon regulatory hints When devices are world roaming they cannot beacon or do active scan on 5 GHz or on channels 12, 13 and 14 on the 2 GHz band. Although we have a good regulatory API some cards may _always_ world roam, this is also true when a system does not have CRDA present. Devices doing world roaming can still passive scan, if they find a beacon from an AP on one of the world roaming frequencies we make the assumption we can do the same and we also remove the passive scan requirement. This adds support for providing beacon regulatory hints based on scans. This works for devices that do either hardware or software scanning. If a channel has not yet been marked as having had a beacon present on it we queue the beacon hint processing into the workqueue. All wireless devices will benefit from beacon regulatory hints from any wireless device on a system including new devices connected to the system at a later time. Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- include/net/wireless.h | 5 +- net/wireless/core.c | 5 +- net/wireless/reg.c | 224 ++++++++++++++++++++++++++++++++++++++++++++++++- net/wireless/reg.h | 21 +++++ net/wireless/scan.c | 3 + 5 files changed, 254 insertions(+), 4 deletions(-) (limited to 'include/net/wireless.h') diff --git a/include/net/wireless.h b/include/net/wireless.h index 1f4707d18adb..64a76208580c 100644 --- a/include/net/wireless.h +++ b/include/net/wireless.h @@ -69,6 +69,9 @@ enum ieee80211_channel_flags { * @band: band this channel belongs to. * @max_antenna_gain: maximum antenna gain in dBi * @max_power: maximum transmission power (in dBm) + * @beacon_found: helper to regulatory code to indicate when a beacon + * has been found on this channel. Use regulatory_hint_found_beacon() + * to enable this, this is is useful only on 5 GHz band. * @orig_mag: internal use * @orig_mpwr: internal use */ @@ -80,6 +83,7 @@ struct ieee80211_channel { u32 flags; int max_antenna_gain; int max_power; + bool beacon_found; u32 orig_flags; int orig_mag, orig_mpwr; }; @@ -425,7 +429,6 @@ extern int regulatory_hint(struct wiphy *wiphy, const char *alpha2); extern void regulatory_hint_11d(struct wiphy *wiphy, u8 *country_ie, u8 country_ie_len); - /** * wiphy_apply_custom_regulatory - apply a custom driver regulatory domain * @wiphy: the wireless device we want to process the regulatory domain on diff --git a/net/wireless/core.c b/net/wireless/core.c index b1a354b7fc06..dd7f222919fe 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -32,8 +32,9 @@ MODULE_DESCRIPTION("wireless configuration support"); LIST_HEAD(cfg80211_drv_list); /* - * This is used to protect the cfg80211_drv_list, cfg80211_regdomain, and - * the last reguluatory request receipt in regd.c + * This is used to protect the cfg80211_drv_list, cfg80211_regdomain, + * country_ie_regdomain, the reg_beacon_list and the the last regulatory + * request receipt (last_request). */ DEFINE_MUTEX(cfg80211_mutex); diff --git a/net/wireless/reg.c b/net/wireless/reg.c index da2a8aca4280..e5e432d6af34 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -68,9 +68,22 @@ const struct ieee80211_regdomain *cfg80211_regdomain; */ static const struct ieee80211_regdomain *country_ie_regdomain; +/* Used to queue up regulatory hints */ static LIST_HEAD(reg_requests_list); static spinlock_t reg_requests_lock; +/* Used to queue up beacon hints for review */ +static LIST_HEAD(reg_pending_beacons); +static spinlock_t reg_pending_beacons_lock; + +/* Used to keep track of processed beacon hints */ +static LIST_HEAD(reg_beacon_list); + +struct reg_beacon { + struct list_head list; + struct ieee80211_channel chan; +}; + /* We keep a static world regulatory domain in case of the absence of CRDA */ static const struct ieee80211_regdomain world_regdom = { .n_reg_rules = 3, @@ -1011,16 +1024,120 @@ static void update_all_wiphy_regulatory(enum reg_set_by setby) wiphy_update_regulatory(&drv->wiphy, setby); } +static void handle_reg_beacon(struct wiphy *wiphy, + unsigned int chan_idx, + struct reg_beacon *reg_beacon) +{ +#ifdef CONFIG_CFG80211_REG_DEBUG +#define REG_DEBUG_BEACON_FLAG(desc) \ + printk(KERN_DEBUG "cfg80211: Enabling " desc " on " \ + "frequency: %d MHz (Ch %d) on %s\n", \ + reg_beacon->chan.center_freq, \ + ieee80211_frequency_to_channel(reg_beacon->chan.center_freq), \ + wiphy_name(wiphy)); +#else +#define REG_DEBUG_BEACON_FLAG(desc) do {} while (0) +#endif + struct ieee80211_supported_band *sband; + struct ieee80211_channel *chan; + + assert_cfg80211_lock(); + + sband = wiphy->bands[reg_beacon->chan.band]; + chan = &sband->channels[chan_idx]; + + if (likely(chan->center_freq != reg_beacon->chan.center_freq)) + return; + + if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { + chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; + REG_DEBUG_BEACON_FLAG("active scanning"); + } + + if (chan->flags & IEEE80211_CHAN_NO_IBSS) { + chan->flags &= ~IEEE80211_CHAN_NO_IBSS; + REG_DEBUG_BEACON_FLAG("beaconing"); + } + + chan->beacon_found = true; +#undef REG_DEBUG_BEACON_FLAG +} + +/* + * Called when a scan on a wiphy finds a beacon on + * new channel + */ +static void wiphy_update_new_beacon(struct wiphy *wiphy, + struct reg_beacon *reg_beacon) +{ + unsigned int i; + struct ieee80211_supported_band *sband; + + assert_cfg80211_lock(); + + if (!wiphy->bands[reg_beacon->chan.band]) + return; + + sband = wiphy->bands[reg_beacon->chan.band]; + + for (i = 0; i < sband->n_channels; i++) + handle_reg_beacon(wiphy, i, reg_beacon); +} + +/* + * Called upon reg changes or a new wiphy is added + */ +static void wiphy_update_beacon_reg(struct wiphy *wiphy) +{ + unsigned int i; + struct ieee80211_supported_band *sband; + struct reg_beacon *reg_beacon; + + assert_cfg80211_lock(); + + if (list_empty(®_beacon_list)) + return; + + list_for_each_entry(reg_beacon, ®_beacon_list, list) { + if (!wiphy->bands[reg_beacon->chan.band]) + continue; + sband = wiphy->bands[reg_beacon->chan.band]; + for (i = 0; i < sband->n_channels; i++) + handle_reg_beacon(wiphy, i, reg_beacon); + } +} + +static bool reg_is_world_roaming(struct wiphy *wiphy) +{ + if (is_world_regdom(cfg80211_regdomain->alpha2) || + (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) + return true; + if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE && + wiphy->custom_regulatory) + return true; + return false; +} + +/* Reap the advantages of previously found beacons */ +static void reg_process_beacons(struct wiphy *wiphy) +{ + if (!reg_is_world_roaming(wiphy)) + return; + wiphy_update_beacon_reg(wiphy); +} + void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby) { enum ieee80211_band band; if (ignore_reg_update(wiphy, setby)) - return; + goto out; for (band = 0; band < IEEE80211_NUM_BANDS; band++) { if (wiphy->bands[band]) handle_band(wiphy, band); } +out: + reg_process_beacons(wiphy); if (wiphy->reg_notifier) wiphy->reg_notifier(wiphy, last_request); } @@ -1314,6 +1431,7 @@ out: return r; } +/* Processes regulatory hints, this is all the REGDOM_SET_BY_* */ static void reg_process_pending_hints(void) { struct regulatory_request *reg_request; @@ -1344,9 +1462,44 @@ static void reg_process_pending_hints(void) spin_unlock(®_requests_lock); } +/* Processes beacon hints -- this has nothing to do with country IEs */ +static void reg_process_pending_beacon_hints(void) +{ + struct cfg80211_registered_device *drv; + struct reg_beacon *pending_beacon, *tmp; + + mutex_lock(&cfg80211_mutex); + + /* This goes through the _pending_ beacon list */ + spin_lock_bh(®_pending_beacons_lock); + + if (list_empty(®_pending_beacons)) { + spin_unlock_bh(®_pending_beacons_lock); + goto out; + } + + list_for_each_entry_safe(pending_beacon, tmp, + ®_pending_beacons, list) { + + list_del_init(&pending_beacon->list); + + /* Applies the beacon hint to current wiphys */ + list_for_each_entry(drv, &cfg80211_drv_list, list) + wiphy_update_new_beacon(&drv->wiphy, pending_beacon); + + /* Remembers the beacon hint for new wiphys or reg changes */ + list_add_tail(&pending_beacon->list, ®_beacon_list); + } + + spin_unlock_bh(®_pending_beacons_lock); +out: + mutex_unlock(&cfg80211_mutex); +} + static void reg_todo(struct work_struct *work) { reg_process_pending_hints(); + reg_process_pending_beacon_hints(); } static DECLARE_WORK(reg_work, reg_todo); @@ -1587,6 +1740,55 @@ out: } EXPORT_SYMBOL(regulatory_hint_11d); +static bool freq_is_chan_12_13_14(u16 freq) +{ + if (freq == ieee80211_channel_to_frequency(12) || + freq == ieee80211_channel_to_frequency(13) || + freq == ieee80211_channel_to_frequency(14)) + return true; + return false; +} + +int regulatory_hint_found_beacon(struct wiphy *wiphy, + struct ieee80211_channel *beacon_chan, + gfp_t gfp) +{ + struct reg_beacon *reg_beacon; + + if (likely((beacon_chan->beacon_found || + (beacon_chan->flags & IEEE80211_CHAN_RADAR) || + (beacon_chan->band == IEEE80211_BAND_2GHZ && + !freq_is_chan_12_13_14(beacon_chan->center_freq))))) + return 0; + + reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); + if (!reg_beacon) + return -ENOMEM; + +#ifdef CONFIG_CFG80211_REG_DEBUG + printk(KERN_DEBUG "cfg80211: Found new beacon on " + "frequency: %d MHz (Ch %d) on %s\n", + beacon_chan->center_freq, + ieee80211_frequency_to_channel(beacon_chan->center_freq), + wiphy_name(wiphy)); +#endif + memcpy(®_beacon->chan, beacon_chan, + sizeof(struct ieee80211_channel)); + + + /* + * Since we can be called from BH or and non-BH context + * we must use spin_lock_bh() + */ + spin_lock_bh(®_pending_beacons_lock); + list_add_tail(®_beacon->list, ®_pending_beacons); + spin_unlock_bh(®_pending_beacons_lock); + + schedule_work(®_work); + + return 0; +} + static void print_rd_rules(const struct ieee80211_regdomain *rd) { unsigned int i; @@ -1908,6 +2110,7 @@ int regulatory_init(void) return PTR_ERR(reg_pdev); spin_lock_init(®_requests_lock); + spin_lock_init(®_pending_beacons_lock); #ifdef CONFIG_WIRELESS_OLD_REGULATORY cfg80211_regdomain = static_regdom(ieee80211_regdom); @@ -1951,6 +2154,7 @@ int regulatory_init(void) void regulatory_exit(void) { struct regulatory_request *reg_request, *tmp; + struct reg_beacon *reg_beacon, *btmp; cancel_work_sync(®_work); @@ -1965,6 +2169,24 @@ void regulatory_exit(void) platform_device_unregister(reg_pdev); + spin_lock_bh(®_pending_beacons_lock); + if (!list_empty(®_pending_beacons)) { + list_for_each_entry_safe(reg_beacon, btmp, + ®_pending_beacons, list) { + list_del(®_beacon->list); + kfree(reg_beacon); + } + } + spin_unlock_bh(®_pending_beacons_lock); + + if (!list_empty(®_beacon_list)) { + list_for_each_entry_safe(reg_beacon, btmp, + ®_beacon_list, list) { + list_del(®_beacon->list); + kfree(reg_beacon); + } + } + spin_lock(®_requests_lock); if (!list_empty(®_requests_list)) { list_for_each_entry_safe(reg_request, tmp, diff --git a/net/wireless/reg.h b/net/wireless/reg.h index 4730def5a69d..65bfd0558ce1 100644 --- a/net/wireless/reg.h +++ b/net/wireless/reg.h @@ -38,4 +38,25 @@ extern int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by, const char *alpha2, u32 country_ie_checksum, enum environment_cap country_ie_env); +/** + * regulatory_hint_found_beacon - hints a beacon was found on a channel + * @wiphy: the wireless device where the beacon was found on + * @beacon_chan: the channel on which the beacon was found on + * @gfp: context flags + * + * This informs the wireless core that a beacon from an AP was found on + * the channel provided. This allows the wireless core to make educated + * guesses on regulatory to help with world roaming. This is only used for + * world roaming -- when we do not know our current location. This is + * only useful on channels 12, 13 and 14 on the 2 GHz band as channels + * 1-11 are already enabled by the world regulatory domain; and on + * non-radar 5 GHz channels. + * + * Drivers do not need to call this, cfg80211 will do it for after a scan + * on a newly found BSS. + */ +int regulatory_hint_found_beacon(struct wiphy *wiphy, + struct ieee80211_channel *beacon_chan, + gfp_t gfp); + #endif /* __NET_WIRELESS_REG_H */ diff --git a/net/wireless/scan.c b/net/wireless/scan.c index 60600657b657..280dbcd02c15 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -430,6 +430,9 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy, if (!res) return NULL; + if (res->pub.capability & WLAN_CAPABILITY_ESS) + regulatory_hint_found_beacon(wiphy, channel, gfp); + /* cfg80211_bss_update gives us a referenced result */ return &res->pub; } -- cgit v1.2.3-59-g8ed1b