net/mac80211/cfg.c

   1 /*
   2  * mac80211 configuration hooks for cfg80211
   3  *
   4  * Copyright 2006       Johannes Berg <johannes@sipsolutions.net>
   5  *
   6  * This file is GPLv2 as found in COPYING.
   7  */
   8
   9 #include <linux/ieee80211.h>
  10 #include <linux/nl80211.h>
  11 #include <linux/rtnetlink.h>
  12 #include <net/net_namespace.h>
  13 #include <net/cfg80211.h>
  14 #include "ieee80211_i.h"
  15 #include "cfg.h"
  16
  17 static enum ieee80211_if_types
  18 nl80211_type_to_mac80211_type(enum nl80211_iftype type)
  19 {
  20         switch (type) {
  21         case NL80211_IFTYPE_UNSPECIFIED:
  22                 return IEEE80211_IF_TYPE_STA;
  23         case NL80211_IFTYPE_ADHOC:
  24                 return IEEE80211_IF_TYPE_IBSS;
  25         case NL80211_IFTYPE_STATION:
  26                 return IEEE80211_IF_TYPE_STA;
  27         case NL80211_IFTYPE_MONITOR:
  28                 return IEEE80211_IF_TYPE_MNTR;
  29         default:
  30                 return IEEE80211_IF_TYPE_INVALID;
  31         }
  32 }
  33
  34 static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
  35                                enum nl80211_iftype type)
  36 {
  37         struct ieee80211_local *local = wiphy_priv(wiphy);
  38         enum ieee80211_if_types itype;
  39
  40         if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
  41                 return -ENODEV;
  42
  43         itype = nl80211_type_to_mac80211_type(type);
  44         if (itype == IEEE80211_IF_TYPE_INVALID)
  45                 return -EINVAL;
  46
  47         return ieee80211_if_add(local->mdev, name, NULL, itype);
  48 }
  49
  50 static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex)
  51 {
  52         struct ieee80211_local *local = wiphy_priv(wiphy);
  53         struct net_device *dev;
  54         char *name;
  55
  56         if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
  57                 return -ENODEV;
  58
  59         /* we're under RTNL */
  60         dev = __dev_get_by_index(&init_net, ifindex);
  61         if (!dev)
  62                 return 0;
  63
  64         name = dev->name;
  65
  66         return ieee80211_if_remove(local->mdev, name, -1);
  67 }
  68
  69 static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
  70                                   enum nl80211_iftype type)
  71 {
  72         struct ieee80211_local *local = wiphy_priv(wiphy);
  73         struct net_device *dev;
  74         enum ieee80211_if_types itype;
  75         struct ieee80211_sub_if_data *sdata;
  76
  77         if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
  78                 return -ENODEV;
  79
  80         /* we're under RTNL */
  81         dev = __dev_get_by_index(&init_net, ifindex);
  82         if (!dev)
  83                 return -ENODEV;
  84
  85         if (netif_running(dev))
  86                 return -EBUSY;
  87
  88         itype = nl80211_type_to_mac80211_type(type);
  89         if (itype == IEEE80211_IF_TYPE_INVALID)
  90                 return -EINVAL;
  91
  92         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  93
  94         if (sdata->type == IEEE80211_IF_TYPE_VLAN)
  95                 return -EOPNOTSUPP;
  96
  97         ieee80211_if_reinit(dev);
  98         ieee80211_if_set_type(dev, itype);
  99
 100         return 0;
 101 }
 102
 103 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 104                              u8 key_idx, u8 *mac_addr,
 105                              struct key_params *params)
 106 {
 107         struct ieee80211_sub_if_data *sdata;
 108         struct sta_info *sta = NULL;
 109         enum ieee80211_key_alg alg;
 110         int ret;
 111
 112         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 113
 114         switch (params->cipher) {
 115         case WLAN_CIPHER_SUITE_WEP40:
 116         case WLAN_CIPHER_SUITE_WEP104:
 117                 alg = ALG_WEP;
 118                 break;
 119         case WLAN_CIPHER_SUITE_TKIP:
 120                 alg = ALG_TKIP;
 121                 break;
 122         case WLAN_CIPHER_SUITE_CCMP:
 123                 alg = ALG_CCMP;
 124                 break;
 125         default:
 126                 return -EINVAL;
 127         }
 128
 129         if (mac_addr) {
 130                 sta = sta_info_get(sdata->local, mac_addr);
 131                 if (!sta)
 132                         return -ENOENT;
 133         }
 134
 135         ret = 0;
 136         if (!ieee80211_key_alloc(sdata, sta, alg, key_idx,
 137                                  params->key_len, params->key))
 138                 ret = -ENOMEM;
 139
 140         if (sta)
 141                 sta_info_put(sta);
 142
 143         return ret;
 144 }
 145
 146 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
 147                              u8 key_idx, u8 *mac_addr)
 148 {
 149         struct ieee80211_sub_if_data *sdata;
 150         struct sta_info *sta;
 151         int ret;
 152
 153         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 154
 155         if (mac_addr) {
 156                 sta = sta_info_get(sdata->local, mac_addr);
 157                 if (!sta)
 158                         return -ENOENT;
 159
 160                 ret = 0;
 161                 if (sta->key)
 162                         ieee80211_key_free(sta->key);
 163                 else
 164                         ret = -ENOENT;
 165
 166                 sta_info_put(sta);
 167                 return ret;
 168         }
 169
 170         if (!sdata->keys[key_idx])
 171                 return -ENOENT;
 172
 173         ieee80211_key_free(sdata->keys[key_idx]);
 174
 175         return 0;
 176 }
 177
 178 static int ieee80211_config_default_key(struct wiphy *wiphy,
 179                                         struct net_device *dev,
 180                                         u8 key_idx)
 181 {
 182         struct ieee80211_sub_if_data *sdata;
 183
 184         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 185         ieee80211_set_default_key(sdata, key_idx);
 186
 187         return 0;
 188 }
 189
 190 struct cfg80211_ops mac80211_config_ops = {
 191         .add_virtual_intf = ieee80211_add_iface,
 192         .del_virtual_intf = ieee80211_del_iface,
 193         .change_virtual_intf = ieee80211_change_iface,
 194         .add_key = ieee80211_add_key,
 195         .del_key = ieee80211_del_key,
 196         .set_default_key = ieee80211_config_default_key,
 197 };