package/mac80211/patches/023-mac80211-implement-sta.patch

   1 Subject: mac80211: implement cfg80211's station handling
   2
   3 This implements station handling from userspace via cfg80211
   4 in mac80211.
   5
   6 Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
   7
   8 ---
   9  net/mac80211/cfg.c |  192 +++++++++++++++++++++++++++++++++++++++++++++++++++++
  10  1 file changed, 192 insertions(+)
  11
  12 --- everything.orig/net/mac80211/cfg.c  2007-11-08 17:11:52.351521702 +0100
  13 +++ everything/net/mac80211/cfg.c       2007-11-08 17:15:51.801523493 +0100
  14 @@ -14,6 +14,7 @@
  15  #include <net/cfg80211.h>
  16  #include "ieee80211_i.h"
  17  #include "cfg.h"
  18 +#include "ieee80211_rate.h"
  19
  20  static enum ieee80211_if_types
  21  nl80211_type_to_mac80211_type(enum nl80211_iftype type)
  22 @@ -428,6 +429,194 @@ static int ieee80211_del_beacon(struct w
  23         return ieee80211_if_config_beacon(dev);
  24  }
  25
  26 +/* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
  27 +struct iapp_layer2_update {
  28 +       u8 da[ETH_ALEN];        /* broadcast */
  29 +       u8 sa[ETH_ALEN];        /* STA addr */
  30 +       __be16 len;             /* 6 */
  31 +       u8 dsap;                /* 0 */
  32 +       u8 ssap;                /* 0 */
  33 +       u8 control;
  34 +       u8 xid_info[3];
  35 +} __attribute__ ((packed));
  36 +
  37 +static void ieee80211_send_layer2_update(struct sta_info *sta)
  38 +{
  39 +       struct iapp_layer2_update *msg;
  40 +       struct sk_buff *skb;
  41 +
  42 +       /* Send Level 2 Update Frame to update forwarding tables in layer 2
  43 +        * bridge devices */
  44 +
  45 +       skb = dev_alloc_skb(sizeof(*msg));
  46 +       if (!skb)
  47 +               return;
  48 +       msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
  49 +
  50 +       /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
  51 +        * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
  52 +
  53 +       memset(msg->da, 0xff, ETH_ALEN);
  54 +       memcpy(msg->sa, sta->addr, ETH_ALEN);
  55 +       msg->len = htons(6);
  56 +       msg->dsap = 0;
  57 +       msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
  58 +       msg->control = 0xaf;    /* XID response lsb.1111F101.
  59 +                                * F=0 (no poll command; unsolicited frame) */
  60 +       msg->xid_info[0] = 0x81;        /* XID format identifier */
  61 +       msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
  62 +       msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
  63 +
  64 +       skb->dev = sta->dev;
  65 +       skb->protocol = eth_type_trans(skb, sta->dev);
  66 +       memset(skb->cb, 0, sizeof(skb->cb));
  67 +       netif_rx(skb);
  68 +}
  69 +
  70 +static void sta_apply_parameters(struct ieee80211_local *local,
  71 +                                struct sta_info *sta,
  72 +                                struct station_parameters *params)
  73 +{
  74 +       u32 rates;
  75 +       int i, j;
  76 +       struct ieee80211_hw_mode *mode;
  77 +
  78 +       if (params->station_flags & STATION_FLAG_CHANGED) {
  79 +               sta->flags &= ~WLAN_STA_AUTHORIZED;
  80 +               if (params->station_flags & STATION_FLAG_AUTHORIZED)
  81 +                       sta->flags |= WLAN_STA_AUTHORIZED;
  82 +
  83 +               sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
  84 +               if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
  85 +                       sta->flags |= WLAN_STA_SHORT_PREAMBLE;
  86 +
  87 +               sta->flags &= ~WLAN_STA_WME;
  88 +               if (params->station_flags & STATION_FLAG_WME)
  89 +                       sta->flags |= WLAN_STA_WME;
  90 +       }
  91 +
  92 +       if (params->aid) {
  93 +               sta->aid = params->aid;
  94 +               if (sta->aid > IEEE80211_MAX_AID)
  95 +                       sta->aid = 0; /* XXX: should this be an error? */
  96 +       }
  97 +
  98 +       if (params->listen_interval >= 0)
  99 +               sta->listen_interval = params->listen_interval;
 100 +
 101 +       if (params->supported_rates) {
 102 +               rates = 0;
 103 +               mode = local->oper_hw_mode;
 104 +               for (i = 0; i < params->supported_rates_len; i++) {
 105 +                       int rate = (params->supported_rates[i] & 0x7f) * 5;
 106 +                       for (j = 0; j < mode->num_rates; j++) {
 107 +                               if (mode->rates[j].rate == rate)
 108 +                                       rates |= BIT(j);
 109 +                       }
 110 +               }
 111 +               sta->supp_rates = rates;
 112 +       }
 113 +}
 114 +
 115 +static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
 116 +                                u8 *mac, struct station_parameters *params)
 117 +{
 118 +       struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 119 +       struct sta_info *sta;
 120 +       struct ieee80211_sub_if_data *sdata;
 121 +
 122 +       /* Prevent a race with changing the rate control algorithm */
 123 +       if (!netif_running(dev))
 124 +               return -ENETDOWN;
 125 +
 126 +       /* XXX: get sta belonging to dev */
 127 +       sta = sta_info_get(local, mac);
 128 +       if (sta) {
 129 +               sta_info_put(sta);
 130 +               return -EEXIST;
 131 +       }
 132 +
 133 +       if (params->vlan) {
 134 +               sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 135 +
 136 +               if (sdata->type != IEEE80211_IF_TYPE_VLAN ||
 137 +                   sdata->type != IEEE80211_IF_TYPE_AP)
 138 +                       return -EINVAL;
 139 +       } else
 140 +               sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 141 +
 142 +       sta = sta_info_add(local, dev, mac, GFP_KERNEL);
 143 +       if (!sta)
 144 +               return -ENOMEM;
 145 +
 146 +       sta->dev = sdata->dev;
 147 +       if (sdata->type == IEEE80211_IF_TYPE_VLAN ||
 148 +           sdata->type == IEEE80211_IF_TYPE_AP)
 149 +               ieee80211_send_layer2_update(sta);
 150 +
 151 +       sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
 152 +
 153 +       sta_apply_parameters(local, sta, params);
 154 +
 155 +       rate_control_rate_init(sta, local);
 156 +
 157 +       sta_info_put(sta);
 158 +
 159 +       return 0;
 160 +}
 161 +
 162 +static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
 163 +                                u8 *mac)
 164 +{
 165 +       struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 166 +       struct sta_info *sta;
 167 +
 168 +       if (mac) {
 169 +               /* XXX: get sta belonging to dev */
 170 +               sta = sta_info_get(local, mac);
 171 +               if (!sta)
 172 +                       return -ENOENT;
 173 +
 174 +               sta_info_free(sta);
 175 +               sta_info_put(sta);
 176 +       } else
 177 +               sta_info_flush(local, dev);
 178 +
 179 +       return 0;
 180 +}
 181 +
 182 +static int ieee80211_change_station(struct wiphy *wiphy,
 183 +                                   struct net_device *dev,
 184 +                                   u8 *mac,
 185 +                                   struct station_parameters *params)
 186 +{
 187 +       struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 188 +       struct sta_info *sta;
 189 +       struct ieee80211_sub_if_data *vlansdata;
 190 +
 191 +       /* XXX: get sta belonging to dev */
 192 +       sta = sta_info_get(local, mac);
 193 +       if (!sta)
 194 +               return -ENOENT;
 195 +
 196 +       if (params->vlan && params->vlan != sta->dev) {
 197 +               vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 198 +
 199 +               if (vlansdata->type != IEEE80211_IF_TYPE_VLAN ||
 200 +                   vlansdata->type != IEEE80211_IF_TYPE_AP)
 201 +                       return -EINVAL;
 202 +
 203 +               sta->dev = params->vlan;
 204 +               ieee80211_send_layer2_update(sta);
 205 +       }
 206 +
 207 +       sta_apply_parameters(local, sta, params);
 208 +
 209 +       sta_info_put(sta);
 210 +
 211 +       return 0;
 212 +}
 213 +
 214  struct cfg80211_ops mac80211_config_ops = {
 215         .add_virtual_intf = ieee80211_add_iface,
 216         .del_virtual_intf = ieee80211_del_iface,
 217 @@ -439,4 +628,7 @@ struct cfg80211_ops mac80211_config_ops
 218         .add_beacon = ieee80211_add_beacon,
 219         .set_beacon = ieee80211_set_beacon,
 220         .del_beacon = ieee80211_del_beacon,
 221 +       .add_station = ieee80211_add_station,
 222 +       .del_station = ieee80211_del_station,
 223 +       .change_station = ieee80211_change_station,
 224  };