mac80211: implement cfg80211 station handling
This implements station handling from userspace via cfg80211 in mac80211. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
David S. Miller
parent
5dfdaf58d6
commit
4fd6931ebe
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@ -14,6 +14,7 @@
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#include <net/cfg80211.h>
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#include "ieee80211_i.h"
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#include "cfg.h"
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#include "ieee80211_rate.h"
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static enum ieee80211_if_types
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nl80211_type_to_mac80211_type(enum nl80211_iftype type)
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@ -447,6 +448,194 @@ static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
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return ieee80211_if_config_beacon(dev);
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}
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/* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
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struct iapp_layer2_update {
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u8 da[ETH_ALEN]; /* broadcast */
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u8 sa[ETH_ALEN]; /* STA addr */
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__be16 len; /* 6 */
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u8 dsap; /* 0 */
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u8 ssap; /* 0 */
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u8 control;
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u8 xid_info[3];
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} __attribute__ ((packed));
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static void ieee80211_send_layer2_update(struct sta_info *sta)
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{
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struct iapp_layer2_update *msg;
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struct sk_buff *skb;
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/* Send Level 2 Update Frame to update forwarding tables in layer 2
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* bridge devices */
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skb = dev_alloc_skb(sizeof(*msg));
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if (!skb)
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return;
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msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
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/* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
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* Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
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memset(msg->da, 0xff, ETH_ALEN);
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memcpy(msg->sa, sta->addr, ETH_ALEN);
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msg->len = htons(6);
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msg->dsap = 0;
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msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */
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msg->control = 0xaf; /* XID response lsb.1111F101.
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* F=0 (no poll command; unsolicited frame) */
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msg->xid_info[0] = 0x81; /* XID format identifier */
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msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */
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msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */
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skb->dev = sta->dev;
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skb->protocol = eth_type_trans(skb, sta->dev);
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memset(skb->cb, 0, sizeof(skb->cb));
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netif_rx(skb);
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}
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static void sta_apply_parameters(struct ieee80211_local *local,
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struct sta_info *sta,
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struct station_parameters *params)
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{
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u32 rates;
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int i, j;
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struct ieee80211_hw_mode *mode;
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if (params->station_flags & STATION_FLAG_CHANGED) {
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sta->flags &= ~WLAN_STA_AUTHORIZED;
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if (params->station_flags & STATION_FLAG_AUTHORIZED)
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sta->flags |= WLAN_STA_AUTHORIZED;
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sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
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if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
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sta->flags |= WLAN_STA_SHORT_PREAMBLE;
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sta->flags &= ~WLAN_STA_WME;
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if (params->station_flags & STATION_FLAG_WME)
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sta->flags |= WLAN_STA_WME;
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}
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if (params->aid) {
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sta->aid = params->aid;
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if (sta->aid > IEEE80211_MAX_AID)
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sta->aid = 0; /* XXX: should this be an error? */
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}
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if (params->listen_interval >= 0)
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sta->listen_interval = params->listen_interval;
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if (params->supported_rates) {
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rates = 0;
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mode = local->oper_hw_mode;
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for (i = 0; i < params->supported_rates_len; i++) {
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int rate = (params->supported_rates[i] & 0x7f) * 5;
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for (j = 0; j < mode->num_rates; j++) {
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if (mode->rates[j].rate == rate)
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rates |= BIT(j);
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}
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}
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sta->supp_rates = rates;
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}
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}
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static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
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u8 *mac, struct station_parameters *params)
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{
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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struct sta_info *sta;
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struct ieee80211_sub_if_data *sdata;
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/* Prevent a race with changing the rate control algorithm */
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if (!netif_running(dev))
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return -ENETDOWN;
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/* XXX: get sta belonging to dev */
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sta = sta_info_get(local, mac);
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if (sta) {
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sta_info_put(sta);
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return -EEXIST;
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}
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if (params->vlan) {
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sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
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if (sdata->vif.type != IEEE80211_IF_TYPE_VLAN ||
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sdata->vif.type != IEEE80211_IF_TYPE_AP)
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return -EINVAL;
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} else
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sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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sta = sta_info_add(local, dev, mac, GFP_KERNEL);
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if (!sta)
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return -ENOMEM;
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sta->dev = sdata->dev;
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if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN ||
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sdata->vif.type == IEEE80211_IF_TYPE_AP)
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ieee80211_send_layer2_update(sta);
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sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
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sta_apply_parameters(local, sta, params);
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rate_control_rate_init(sta, local);
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sta_info_put(sta);
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return 0;
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}
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static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
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u8 *mac)
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{
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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struct sta_info *sta;
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if (mac) {
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/* XXX: get sta belonging to dev */
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sta = sta_info_get(local, mac);
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if (!sta)
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return -ENOENT;
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sta_info_free(sta);
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sta_info_put(sta);
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} else
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sta_info_flush(local, dev);
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return 0;
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}
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static int ieee80211_change_station(struct wiphy *wiphy,
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struct net_device *dev,
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u8 *mac,
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struct station_parameters *params)
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{
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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struct sta_info *sta;
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struct ieee80211_sub_if_data *vlansdata;
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/* XXX: get sta belonging to dev */
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sta = sta_info_get(local, mac);
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if (!sta)
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return -ENOENT;
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if (params->vlan && params->vlan != sta->dev) {
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vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
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if (vlansdata->vif.type != IEEE80211_IF_TYPE_VLAN ||
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vlansdata->vif.type != IEEE80211_IF_TYPE_AP)
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return -EINVAL;
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sta->dev = params->vlan;
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ieee80211_send_layer2_update(sta);
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}
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sta_apply_parameters(local, sta, params);
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sta_info_put(sta);
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return 0;
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}
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struct cfg80211_ops mac80211_config_ops = {
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.add_virtual_intf = ieee80211_add_iface,
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.del_virtual_intf = ieee80211_del_iface,
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@ -458,5 +647,8 @@ struct cfg80211_ops mac80211_config_ops = {
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.add_beacon = ieee80211_add_beacon,
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.set_beacon = ieee80211_set_beacon,
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.del_beacon = ieee80211_del_beacon,
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.add_station = ieee80211_add_station,
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.del_station = ieee80211_del_station,
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.change_station = ieee80211_change_station,
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.get_station = ieee80211_get_station,
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};
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