From 4fd6931ebe24640bec72b91ba612325843a5e3cc Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 19 Dec 2007 02:03:35 +0100 Subject: [PATCH] mac80211: implement cfg80211 station handling This implements station handling from userspace via cfg80211 in mac80211. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/cfg.c | 192 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 192 insertions(+) diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 5a4c6edd9348..22c9619ba776 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -14,6 +14,7 @@ #include #include "ieee80211_i.h" #include "cfg.h" +#include "ieee80211_rate.h" static enum ieee80211_if_types nl80211_type_to_mac80211_type(enum nl80211_iftype type) @@ -447,6 +448,194 @@ static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev) return ieee80211_if_config_beacon(dev); } +/* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */ +struct iapp_layer2_update { + u8 da[ETH_ALEN]; /* broadcast */ + u8 sa[ETH_ALEN]; /* STA addr */ + __be16 len; /* 6 */ + u8 dsap; /* 0 */ + u8 ssap; /* 0 */ + u8 control; + u8 xid_info[3]; +} __attribute__ ((packed)); + +static void ieee80211_send_layer2_update(struct sta_info *sta) +{ + struct iapp_layer2_update *msg; + struct sk_buff *skb; + + /* Send Level 2 Update Frame to update forwarding tables in layer 2 + * bridge devices */ + + skb = dev_alloc_skb(sizeof(*msg)); + if (!skb) + return; + msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg)); + + /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID) + * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */ + + memset(msg->da, 0xff, ETH_ALEN); + memcpy(msg->sa, sta->addr, ETH_ALEN); + msg->len = htons(6); + msg->dsap = 0; + msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */ + msg->control = 0xaf; /* XID response lsb.1111F101. + * F=0 (no poll command; unsolicited frame) */ + msg->xid_info[0] = 0x81; /* XID format identifier */ + msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */ + msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */ + + skb->dev = sta->dev; + skb->protocol = eth_type_trans(skb, sta->dev); + memset(skb->cb, 0, sizeof(skb->cb)); + netif_rx(skb); +} + +static void sta_apply_parameters(struct ieee80211_local *local, + struct sta_info *sta, + struct station_parameters *params) +{ + u32 rates; + int i, j; + struct ieee80211_hw_mode *mode; + + if (params->station_flags & STATION_FLAG_CHANGED) { + sta->flags &= ~WLAN_STA_AUTHORIZED; + if (params->station_flags & STATION_FLAG_AUTHORIZED) + sta->flags |= WLAN_STA_AUTHORIZED; + + sta->flags &= ~WLAN_STA_SHORT_PREAMBLE; + if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE) + sta->flags |= WLAN_STA_SHORT_PREAMBLE; + + sta->flags &= ~WLAN_STA_WME; + if (params->station_flags & STATION_FLAG_WME) + sta->flags |= WLAN_STA_WME; + } + + if (params->aid) { + sta->aid = params->aid; + if (sta->aid > IEEE80211_MAX_AID) + sta->aid = 0; /* XXX: should this be an error? */ + } + + if (params->listen_interval >= 0) + sta->listen_interval = params->listen_interval; + + if (params->supported_rates) { + rates = 0; + mode = local->oper_hw_mode; + for (i = 0; i < params->supported_rates_len; i++) { + int rate = (params->supported_rates[i] & 0x7f) * 5; + for (j = 0; j < mode->num_rates; j++) { + if (mode->rates[j].rate == rate) + rates |= BIT(j); + } + } + sta->supp_rates = rates; + } +} + +static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev, + u8 *mac, struct station_parameters *params) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct sta_info *sta; + struct ieee80211_sub_if_data *sdata; + + /* Prevent a race with changing the rate control algorithm */ + if (!netif_running(dev)) + return -ENETDOWN; + + /* XXX: get sta belonging to dev */ + sta = sta_info_get(local, mac); + if (sta) { + sta_info_put(sta); + return -EEXIST; + } + + if (params->vlan) { + sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan); + + if (sdata->vif.type != IEEE80211_IF_TYPE_VLAN || + sdata->vif.type != IEEE80211_IF_TYPE_AP) + return -EINVAL; + } else + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + sta = sta_info_add(local, dev, mac, GFP_KERNEL); + if (!sta) + return -ENOMEM; + + sta->dev = sdata->dev; + if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN || + sdata->vif.type == IEEE80211_IF_TYPE_AP) + ieee80211_send_layer2_update(sta); + + sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC; + + sta_apply_parameters(local, sta, params); + + rate_control_rate_init(sta, local); + + sta_info_put(sta); + + return 0; +} + +static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev, + u8 *mac) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct sta_info *sta; + + if (mac) { + /* XXX: get sta belonging to dev */ + sta = sta_info_get(local, mac); + if (!sta) + return -ENOENT; + + sta_info_free(sta); + sta_info_put(sta); + } else + sta_info_flush(local, dev); + + return 0; +} + +static int ieee80211_change_station(struct wiphy *wiphy, + struct net_device *dev, + u8 *mac, + struct station_parameters *params) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct sta_info *sta; + struct ieee80211_sub_if_data *vlansdata; + + /* XXX: get sta belonging to dev */ + sta = sta_info_get(local, mac); + if (!sta) + return -ENOENT; + + if (params->vlan && params->vlan != sta->dev) { + vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan); + + if (vlansdata->vif.type != IEEE80211_IF_TYPE_VLAN || + vlansdata->vif.type != IEEE80211_IF_TYPE_AP) + return -EINVAL; + + sta->dev = params->vlan; + ieee80211_send_layer2_update(sta); + } + + sta_apply_parameters(local, sta, params); + + sta_info_put(sta); + + return 0; +} + struct cfg80211_ops mac80211_config_ops = { .add_virtual_intf = ieee80211_add_iface, .del_virtual_intf = ieee80211_del_iface, @@ -458,5 +647,8 @@ struct cfg80211_ops mac80211_config_ops = { .add_beacon = ieee80211_add_beacon, .set_beacon = ieee80211_set_beacon, .del_beacon = ieee80211_del_beacon, + .add_station = ieee80211_add_station, + .del_station = ieee80211_del_station, + .change_station = ieee80211_change_station, .get_station = ieee80211_get_station, }; -- 2.20.1