net/wireless/ap.c

   1 #include <linux/ieee80211.h>
   2 #include <linux/export.h>
   3 #include <net/cfg80211.h>
   4 #include "nl80211.h"
   5 #include "core.h"
   6 #include "rdev-ops.h"
   7
   8
   9 static int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
  10                               struct net_device *dev)
  11 {
  12         struct wireless_dev *wdev = dev->ieee80211_ptr;
  13         int err;
  14
  15         ASSERT_WDEV_LOCK(wdev);
  16
  17         if (!rdev->ops->stop_ap)
  18                 return -EOPNOTSUPP;
  19
  20         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
  21             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
  22                 return -EOPNOTSUPP;
  23
  24         if (!wdev->beacon_interval)
  25                 return -ENOENT;
  26
  27         err = rdev_stop_ap(rdev, dev);
  28         if (!err) {
  29                 wdev->beacon_interval = 0;
  30                 wdev->channel = NULL;
  31                 wdev->ssid_len = 0;
  32         }
  33
  34         return err;
  35 }
  36
  37 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
  38                      struct net_device *dev)
  39 {
  40         struct wireless_dev *wdev = dev->ieee80211_ptr;
  41         int err;
  42
  43         wdev_lock(wdev);
  44         err = __cfg80211_stop_ap(rdev, dev);
  45         wdev_unlock(wdev);
  46
  47         return err;
  48 }
  49
  50 void cfg80211_ch_switch_notify(struct net_device *dev,
  51                                struct cfg80211_chan_def *chandef)
  52 {
  53         struct wireless_dev *wdev = dev->ieee80211_ptr;
  54         struct wiphy *wiphy = wdev->wiphy;
  55         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
  56
  57         trace_cfg80211_ch_switch_notify(dev, chandef);
  58
  59         wdev_lock(wdev);
  60
  61         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
  62                     wdev->iftype != NL80211_IFTYPE_P2P_GO))
  63                 goto out;
  64
  65         wdev->channel = chandef->chan;
  66         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
  67 out:
  68         wdev_unlock(wdev);
  69         return;
  70 }
  71 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
  72
  73 bool cfg80211_rx_spurious_frame(struct net_device *dev,
  74                                 const u8 *addr, gfp_t gfp)
  75 {
  76         struct wireless_dev *wdev = dev->ieee80211_ptr;
  77         bool ret;
  78
  79         trace_cfg80211_rx_spurious_frame(dev, addr);
  80
  81         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
  82                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
  83                 trace_cfg80211_return_bool(false);
  84                 return false;
  85         }
  86         ret = nl80211_unexpected_frame(dev, addr, gfp);
  87         trace_cfg80211_return_bool(ret);
  88         return ret;
  89 }
  90 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
  91
  92 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
  93                                         const u8 *addr, gfp_t gfp)
  94 {
  95         struct wireless_dev *wdev = dev->ieee80211_ptr;
  96         bool ret;
  97
  98         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
  99
 100         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
 101                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
 102                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
 103                 trace_cfg80211_return_bool(false);
 104                 return false;
 105         }
 106         ret = nl80211_unexpected_4addr_frame(dev, addr, gfp);
 107         trace_cfg80211_return_bool(ret);
 108         return ret;
 109 }
 110 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);