diff options
| -rw-r--r-- | include/linux/ieee80211.h | 11 | ||||
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 6 | ||||
| -rw-r--r-- | net/mac80211/ieee80211_sta.c | 69 |
3 files changed, 67 insertions, 19 deletions
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index ecd61e8..272f8c8 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -227,6 +227,17 @@ struct ieee80211_cts { #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10) #define WLAN_CAPABILITY_DSSS_OFDM (1<<13) +/* 802.11g ERP information element */ +#define WLAN_ERP_NON_ERP_PRESENT (1<<0) +#define WLAN_ERP_USE_PROTECTION (1<<1) +#define WLAN_ERP_BARKER_PREAMBLE (1<<2) + +/* WLAN_ERP_BARKER_PREAMBLE values */ +enum { + WLAN_ERP_PREAMBLE_SHORT = 0, + WLAN_ERP_PREAMBLE_LONG = 1, +}; + /* Status codes */ enum ieee80211_statuscode { WLAN_STATUS_SUCCESS = 0, diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index b222a9a..99ff7c5 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -99,6 +99,12 @@ struct ieee80211_sta_bss { int probe_resp; unsigned long last_update; + /* during assocation, we save an ERP value from a probe response so + * that we can feed ERP info to the driver when handling the + * association completes. these fields probably won't be up-to-date + * otherwise, you probably don't want to use them. */ + int has_erp_value; + u8 erp_value; }; diff --git a/net/mac80211/ieee80211_sta.c b/net/mac80211/ieee80211_sta.c index f3ca837..df6c410 100644 --- a/net/mac80211/ieee80211_sta.c +++ b/net/mac80211/ieee80211_sta.c @@ -314,6 +314,27 @@ static void ieee80211_sta_wmm_params(struct net_device *dev, } +static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_if_sta *ifsta = &sdata->u.sta; + int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0; + + if (use_protection != !!ifsta->use_protection) { + if (net_ratelimit()) { + printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" + MAC_FMT ")\n", + dev->name, + use_protection ? "enabled" : "disabled", + MAC_ARG(ifsta->bssid)); + } + ifsta->use_protection = use_protection ? 1 : 0; + local->cts_protect_erp_frames = use_protection; + } +} + + static void ieee80211_sta_send_associnfo(struct net_device *dev, struct ieee80211_if_sta *ifsta) { @@ -377,9 +398,18 @@ static void ieee80211_set_associated(struct net_device *dev, if (assoc) { struct ieee80211_sub_if_data *sdata; + struct ieee80211_sta_bss *bss; sdata = IEEE80211_DEV_TO_SUB_IF(dev); if (sdata->type != IEEE80211_IF_TYPE_STA) return; + + bss = ieee80211_rx_bss_get(dev, ifsta->bssid); + if (bss) { + if (bss->has_erp_value) + ieee80211_handle_erp_ie(dev, bss->erp_value); + ieee80211_rx_bss_put(dev, bss); + } + netif_carrier_on(dev); ifsta->prev_bssid_set = 1; memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); @@ -1177,6 +1207,18 @@ static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev, return; } + /* it probably doesn't, but if the frame includes an ERP value then + * update our stored copy */ + if (elems.erp_info && elems.erp_info_len >= 1) { + struct ieee80211_sta_bss *bss + = ieee80211_rx_bss_get(dev, ifsta->bssid); + if (bss) { + bss->erp_value = elems.erp_info[0]; + bss->has_erp_value = 1; + ieee80211_rx_bss_put(dev, bss); + } + } + printk(KERN_DEBUG "%s: associated\n", dev->name); ifsta->aid = aid; ifsta->ap_capab = capab_info; @@ -1499,6 +1541,12 @@ static void ieee80211_rx_bss_info(struct net_device *dev, return; } + /* save the ERP value so that it is available at association time */ + if (elems.erp_info && elems.erp_info_len >= 1) { + bss->erp_value = elems.erp_info[0]; + bss->has_erp_value = 1; + } + bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) { @@ -1614,10 +1662,8 @@ static void ieee80211_rx_mgmt_beacon(struct net_device *dev, size_t len, struct ieee80211_rx_status *rx_status) { - struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); struct ieee80211_sub_if_data *sdata; struct ieee80211_if_sta *ifsta; - int use_protection; size_t baselen; struct ieee802_11_elems elems; @@ -1641,23 +1687,8 @@ static void ieee80211_rx_mgmt_beacon(struct net_device *dev, &elems) == ParseFailed) return; - use_protection = 0; - if (elems.erp_info && elems.erp_info_len >= 1) { - use_protection = - (elems.erp_info[0] & ERP_INFO_USE_PROTECTION) != 0; - } - - if (use_protection != !!ifsta->use_protection) { - if (net_ratelimit()) { - printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" - MAC_FMT ")\n", - dev->name, - use_protection ? "enabled" : "disabled", - MAC_ARG(ifsta->bssid)); - } - ifsta->use_protection = use_protection ? 1 : 0; - local->cts_protect_erp_frames = use_protection; - } + if (elems.erp_info && elems.erp_info_len >= 1) + ieee80211_handle_erp_ie(dev, elems.erp_info[0]); if (elems.wmm_param && ifsta->wmm_enabled) { ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, |