net/wireless/wext-sme.c

   1 /*
   2  * cfg80211 wext compat for managed mode.
   3  *
   4  * Copyright 2009       Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright (C) 2009   Intel Corporation. All rights reserved.
   6  */
   7
   8 #include <linux/etherdevice.h>
   9 #include <linux/if_arp.h>
  10 #include <net/cfg80211.h>
  11 #include "nl80211.h"
  12
  13 static int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
  14                                      struct wireless_dev *wdev)
  15 {
  16         int err;
  17
  18         ASSERT_RDEV_LOCK(rdev);
  19         ASSERT_WDEV_LOCK(wdev);
  20
  21         if (!netif_running(wdev->netdev))
  22                 return 0;
  23
  24         wdev->wext.connect.ie = wdev->wext.ie;
  25         wdev->wext.connect.ie_len = wdev->wext.ie_len;
  26         wdev->wext.connect.privacy = wdev->wext.default_key != -1;
  27
  28         err = 0;
  29         if (wdev->wext.connect.ssid_len != 0)
  30                 err = __cfg80211_connect(rdev, wdev->netdev,
  31                                          &wdev->wext.connect);
  32
  33         return err;
  34 }
  35
  36 int cfg80211_mgd_wext_siwfreq(struct net_device *dev,
  37                               struct iw_request_info *info,
  38                               struct iw_freq *freq, char *extra)
  39 {
  40         struct wireless_dev *wdev = dev->ieee80211_ptr;
  41         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
  42         struct ieee80211_channel *chan;
  43         int err;
  44
  45         /* call only for station! */
  46         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
  47                 return -EINVAL;
  48
  49         chan = cfg80211_wext_freq(wdev->wiphy, freq);
  50         if (chan && IS_ERR(chan))
  51                 return PTR_ERR(chan);
  52
  53         if (chan && (chan->flags & IEEE80211_CHAN_DISABLED))
  54                 return -EINVAL;
  55
  56         cfg80211_lock_rdev(rdev);
  57         wdev_lock(wdev);
  58
  59         if (wdev->wext.connect.channel == chan) {
  60                 err = 0;
  61                 goto out;
  62         }
  63
  64         if (wdev->sme_state != CFG80211_SME_IDLE) {
  65                 bool event = true;
  66                 /* if SSID set, we'll try right again, avoid event */
  67                 if (wdev->wext.connect.ssid_len)
  68                         event = false;
  69                 err = __cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
  70                                             dev, WLAN_REASON_DEAUTH_LEAVING,
  71                                             event);
  72                 if (err)
  73                         goto out;
  74         }
  75
  76
  77         wdev->wext.connect.channel = chan;
  78
  79         /* SSID is not set, we just want to switch channel */
  80         if (wdev->wext.connect.ssid_len && chan) {
  81                 err = -EOPNOTSUPP;
  82                 if (rdev->ops->set_channel)
  83                         err = rdev->ops->set_channel(wdev->wiphy, chan,
  84                                                      NL80211_CHAN_NO_HT);
  85                 goto out;
  86         }
  87
  88         err = cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
  89  out:
  90         wdev_unlock(wdev);
  91         cfg80211_unlock_rdev(rdev);
  92         return err;
  93 }
  94 /* temporary symbol - mark GPL - in the future the handler won't be */
  95 EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_siwfreq);
  96
  97 int cfg80211_mgd_wext_giwfreq(struct net_device *dev,
  98                               struct iw_request_info *info,
  99                               struct iw_freq *freq, char *extra)
 100 {
 101         struct wireless_dev *wdev = dev->ieee80211_ptr;
 102         struct ieee80211_channel *chan = NULL;
 103
 104         /* call only for station! */
 105         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 106                 return -EINVAL;
 107
 108         wdev_lock(wdev);
 109         if (wdev->current_bss)
 110                 chan = wdev->current_bss->pub.channel;
 111         else if (wdev->wext.connect.channel)
 112                 chan = wdev->wext.connect.channel;
 113         wdev_unlock(wdev);
 114
 115         if (chan) {
 116                 freq->m = chan->center_freq;
 117                 freq->e = 6;
 118                 return 0;
 119         }
 120
 121         /* no channel if not joining */
 122         return -EINVAL;
 123 }
 124 /* temporary symbol - mark GPL - in the future the handler won't be */
 125 EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_giwfreq);
 126
 127 int cfg80211_mgd_wext_siwessid(struct net_device *dev,
 128                                struct iw_request_info *info,
 129                                struct iw_point *data, char *ssid)
 130 {
 131         struct wireless_dev *wdev = dev->ieee80211_ptr;
 132         size_t len = data->length;
 133         int err;
 134
 135         /* call only for station! */
 136         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 137                 return -EINVAL;
 138
 139         if (!data->flags)
 140                 len = 0;
 141
 142         /* iwconfig uses nul termination in SSID.. */
 143         if (len > 0 && ssid[len - 1] == '\0')
 144                 len--;
 145
 146         cfg80211_lock_rdev(wiphy_to_dev(wdev->wiphy));
 147         wdev_lock(wdev);
 148
 149         err = 0;
 150
 151         if (wdev->wext.connect.ssid && len &&
 152             len == wdev->wext.connect.ssid_len &&
 153             memcmp(wdev->wext.connect.ssid, ssid, len))
 154                 goto out;
 155
 156         if (wdev->sme_state != CFG80211_SME_IDLE) {
 157                 bool event = true;
 158                 /* if SSID set now, we'll try to connect, avoid event */
 159                 if (len)
 160                         event = false;
 161                 err = __cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
 162                                             dev, WLAN_REASON_DEAUTH_LEAVING,
 163                                             event);
 164                 if (err)
 165                         goto out;
 166         }
 167
 168         wdev->wext.connect.ssid = wdev->wext.ssid;
 169         memcpy(wdev->wext.ssid, ssid, len);
 170         wdev->wext.connect.ssid_len = len;
 171
 172         wdev->wext.connect.crypto.control_port = false;
 173
 174         err = cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
 175  out:
 176         wdev_unlock(wdev);
 177         cfg80211_unlock_rdev(wiphy_to_dev(wdev->wiphy));
 178         return err;
 179 }
 180 /* temporary symbol - mark GPL - in the future the handler won't be */
 181 EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_siwessid);
 182
 183 int cfg80211_mgd_wext_giwessid(struct net_device *dev,
 184                                struct iw_request_info *info,
 185                                struct iw_point *data, char *ssid)
 186 {
 187         struct wireless_dev *wdev = dev->ieee80211_ptr;
 188
 189         /* call only for station! */
 190         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 191                 return -EINVAL;
 192
 193         data->flags = 0;
 194
 195         wdev_lock(wdev);
 196         if (wdev->ssid_len) {
 197                 data->flags = 1;
 198                 data->length = wdev->ssid_len;
 199                 memcpy(ssid, wdev->ssid, data->length);
 200         } else if (wdev->wext.connect.ssid && wdev->wext.connect.ssid_len) {
 201                 data->flags = 1;
 202                 data->length = wdev->wext.connect.ssid_len;
 203                 memcpy(ssid, wdev->wext.connect.ssid, data->length);
 204         } else
 205                 data->flags = 0;
 206         wdev_unlock(wdev);
 207
 208         return 0;
 209 }
 210 /* temporary symbol - mark GPL - in the future the handler won't be */
 211 EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_giwessid);
 212
 213 int cfg80211_mgd_wext_siwap(struct net_device *dev,
 214                             struct iw_request_info *info,
 215                             struct sockaddr *ap_addr, char *extra)
 216 {
 217         struct wireless_dev *wdev = dev->ieee80211_ptr;
 218         u8 *bssid = ap_addr->sa_data;
 219         int err;
 220
 221         /* call only for station! */
 222         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 223                 return -EINVAL;
 224
 225         if (ap_addr->sa_family != ARPHRD_ETHER)
 226                 return -EINVAL;
 227
 228         /* automatic mode */
 229         if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
 230                 bssid = NULL;
 231
 232         cfg80211_lock_rdev(wiphy_to_dev(wdev->wiphy));
 233         wdev_lock(wdev);
 234
 235         err = 0;
 236         /* both automatic */
 237         if (!bssid && !wdev->wext.connect.bssid)
 238                 goto out;
 239
 240         /* fixed already - and no change */
 241         if (wdev->wext.connect.bssid && bssid &&
 242             compare_ether_addr(bssid, wdev->wext.connect.bssid) == 0)
 243                 goto out;
 244
 245         if (wdev->sme_state != CFG80211_SME_IDLE) {
 246                 err = __cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
 247                                             dev, WLAN_REASON_DEAUTH_LEAVING,
 248                                             false);
 249                 if (err)
 250                         goto out;
 251         }
 252
 253         if (bssid) {
 254                 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
 255                 wdev->wext.connect.bssid = wdev->wext.bssid;
 256         } else
 257                 wdev->wext.connect.bssid = NULL;
 258
 259         err = cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
 260  out:
 261         wdev_unlock(wdev);
 262         cfg80211_unlock_rdev(wiphy_to_dev(wdev->wiphy));
 263         return err;
 264 }
 265 /* temporary symbol - mark GPL - in the future the handler won't be */
 266 EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_siwap);
 267
 268 int cfg80211_mgd_wext_giwap(struct net_device *dev,
 269                             struct iw_request_info *info,
 270                             struct sockaddr *ap_addr, char *extra)
 271 {
 272         struct wireless_dev *wdev = dev->ieee80211_ptr;
 273
 274         /* call only for station! */
 275         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 276                 return -EINVAL;
 277
 278         ap_addr->sa_family = ARPHRD_ETHER;
 279
 280         wdev_lock(wdev);
 281         if (wdev->current_bss)
 282                 memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
 283         else if (wdev->wext.connect.bssid)
 284                 memcpy(ap_addr->sa_data, wdev->wext.connect.bssid, ETH_ALEN);
 285         else
 286                 memset(ap_addr->sa_data, 0, ETH_ALEN);
 287         wdev_unlock(wdev);
 288
 289         return 0;
 290 }
 291 /* temporary symbol - mark GPL - in the future the handler won't be */
 292 EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_giwap);
 293
 294 int cfg80211_wext_siwgenie(struct net_device *dev,
 295                            struct iw_request_info *info,
 296                            struct iw_point *data, char *extra)
 297 {
 298         struct wireless_dev *wdev = dev->ieee80211_ptr;
 299         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 300         u8 *ie = extra;
 301         int ie_len = data->length, err;
 302
 303         if (wdev->iftype != NL80211_IFTYPE_STATION)
 304                 return -EOPNOTSUPP;
 305
 306         if (!ie_len)
 307                 ie = NULL;
 308
 309         wdev_lock(wdev);
 310
 311         /* no change */
 312         err = 0;
 313         if (wdev->wext.ie_len == ie_len &&
 314             memcmp(wdev->wext.ie, ie, ie_len) == 0)
 315                 goto out;
 316
 317         if (ie_len) {
 318                 ie = kmemdup(extra, ie_len, GFP_KERNEL);
 319                 if (!ie) {
 320                         err = -ENOMEM;
 321                         goto out;
 322                 }
 323         } else
 324                 ie = NULL;
 325
 326         kfree(wdev->wext.ie);
 327         wdev->wext.ie = ie;
 328         wdev->wext.ie_len = ie_len;
 329
 330         if (wdev->sme_state != CFG80211_SME_IDLE) {
 331                 err = __cfg80211_disconnect(rdev, dev,
 332                                             WLAN_REASON_DEAUTH_LEAVING, false);
 333                 if (err)
 334                         goto out;
 335         }
 336
 337         /* userspace better not think we'll reconnect */
 338         err = 0;
 339  out:
 340         wdev_unlock(wdev);
 341         return err;
 342 }
 343 EXPORT_SYMBOL_GPL(cfg80211_wext_siwgenie);
 344
 345 int cfg80211_wext_siwmlme(struct net_device *dev,
 346                           struct iw_request_info *info,
 347                           struct iw_point *data, char *extra)
 348 {
 349         struct wireless_dev *wdev = dev->ieee80211_ptr;
 350         struct iw_mlme *mlme = (struct iw_mlme *)extra;
 351         struct cfg80211_registered_device *rdev;
 352         int err;
 353
 354         if (!wdev)
 355                 return -EOPNOTSUPP;
 356
 357         rdev = wiphy_to_dev(wdev->wiphy);
 358
 359         if (wdev->iftype != NL80211_IFTYPE_STATION)
 360                 return -EINVAL;
 361
 362         if (mlme->addr.sa_family != ARPHRD_ETHER)
 363                 return -EINVAL;
 364
 365         wdev_lock(wdev);
 366         switch (mlme->cmd) {
 367         case IW_MLME_DEAUTH:
 368         case IW_MLME_DISASSOC:
 369                 err = __cfg80211_disconnect(rdev, dev, mlme->reason_code,
 370                                             true);
 371                 break;
 372         default:
 373                 err = -EOPNOTSUPP;
 374                 break;
 375         }
 376         wdev_unlock(wdev);
 377
 378         return err;
 379 }
 380 EXPORT_SYMBOL_GPL(cfg80211_wext_siwmlme);