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/nl80211.h>
  10 #include <linux/rtnetlink.h>
  11 #include <net/net_namespace.h>
  12 #include <net/cfg80211.h>
  13 #include "ieee80211_i.h"
  14 #include "cfg.h"
  15
  16 static enum ieee80211_if_types
  17 nl80211_type_to_mac80211_type(enum nl80211_iftype type)
  18 {
  19         switch (type) {
  20         case NL80211_IFTYPE_UNSPECIFIED:
  21                 return IEEE80211_IF_TYPE_STA;
  22         case NL80211_IFTYPE_ADHOC:
  23                 return IEEE80211_IF_TYPE_IBSS;
  24         case NL80211_IFTYPE_STATION:
  25                 return IEEE80211_IF_TYPE_STA;
  26         case NL80211_IFTYPE_MONITOR:
  27                 return IEEE80211_IF_TYPE_MNTR;
  28         default:
  29                 return IEEE80211_IF_TYPE_INVALID;
  30         }
  31 }
  32
  33 static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
  34                                enum nl80211_iftype type)
  35 {
  36         struct ieee80211_local *local = wiphy_priv(wiphy);
  37         enum ieee80211_if_types itype;
  38
  39         if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
  40                 return -ENODEV;
  41
  42         itype = nl80211_type_to_mac80211_type(type);
  43         if (itype == IEEE80211_IF_TYPE_INVALID)
  44                 return -EINVAL;
  45
  46         return ieee80211_if_add(local->mdev, name, NULL, itype);
  47 }
  48
  49 static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex)
  50 {
  51         struct ieee80211_local *local = wiphy_priv(wiphy);
  52         struct net_device *dev;
  53         char *name;
  54
  55         if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
  56                 return -ENODEV;
  57
  58         /* we're under RTNL */
  59         dev = __dev_get_by_index(&init_net, ifindex);
  60         if (!dev)
  61                 return 0;
  62
  63         name = dev->name;
  64
  65         return ieee80211_if_remove(local->mdev, name, -1);
  66 }
  67
  68 static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
  69                                   enum nl80211_iftype type)
  70 {
  71         struct ieee80211_local *local = wiphy_priv(wiphy);
  72         struct net_device *dev;
  73         enum ieee80211_if_types itype;
  74         struct ieee80211_sub_if_data *sdata;
  75
  76         if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
  77                 return -ENODEV;
  78
  79         /* we're under RTNL */
  80         dev = __dev_get_by_index(&init_net, ifindex);
  81         if (!dev)
  82                 return -ENODEV;
  83
  84         if (netif_running(dev))
  85                 return -EBUSY;
  86
  87         itype = nl80211_type_to_mac80211_type(type);
  88         if (itype == IEEE80211_IF_TYPE_INVALID)
  89                 return -EINVAL;
  90
  91         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  92
  93         if (sdata->type == IEEE80211_IF_TYPE_VLAN)
  94                 return -EOPNOTSUPP;
  95
  96         ieee80211_if_reinit(dev);
  97         ieee80211_if_set_type(dev, itype);
  98
  99         return 0;
 100 }
 101
 102 struct cfg80211_ops mac80211_config_ops = {
 103         .add_virtual_intf = ieee80211_add_iface,
 104         .del_virtual_intf = ieee80211_del_iface,
 105         .change_virtual_intf = ieee80211_change_iface,
 106 };