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mac80211: implement cfg80211 station handling

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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 2007-12-19 02:03:35 +01:00 committed by David S. Miller
parent 5dfdaf58d6
commit 4fd6931ebe
1 changed files with 192 additions and 0 deletions
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192
net/mac80211/cfg.c
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@ -14,6 +14,7 @@
#include <net/cfg80211.h>
#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,
};