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 "wext-compat.h"
  12 #include "nl80211.h"
  13
  14 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
  15                               struct wireless_dev *wdev)
  16 {
  17         struct cfg80211_cached_keys *ck = NULL;
  18         int err, i;
  19
  20         ASSERT_RDEV_LOCK(rdev);
  21         ASSERT_WDEV_LOCK(wdev);
  22
  23         if (!netif_running(wdev->netdev))
  24                 return 0;
  25
  26         wdev->wext.connect.ie = wdev->wext.ie;
  27         wdev->wext.connect.ie_len = wdev->wext.ie_len;
  28         wdev->wext.connect.privacy = wdev->wext.default_key != -1;
  29
  30         if (wdev->wext.keys) {
  31                 wdev->wext.keys->def = wdev->wext.default_key;
  32                 wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
  33         }
  34
  35         if (!wdev->wext.connect.ssid_len)
  36                 return 0;
  37
  38         if (wdev->wext.keys) {
  39                 ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
  40                 if (!ck)
  41                         return -ENOMEM;
  42                 for (i = 0; i < 6; i++)
  43                         ck->params[i].key = ck->data[i];
  44         }
  45         err = __cfg80211_connect(rdev, wdev->netdev,
  46                                  &wdev->wext.connect, ck);
  47         if (err)
  48                 kfree(ck);
  49
  50         return err;
  51 }
  52
  53 int cfg80211_mgd_wext_siwfreq(struct net_device *dev,
  54                               struct iw_request_info *info,
  55                               struct iw_freq *freq, char *extra)
  56 {
  57         struct wireless_dev *wdev = dev->ieee80211_ptr;
  58         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
  59         struct ieee80211_channel *chan;
  60         int err;
  61
  62         /* call only for station! */
  63         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
  64                 return -EINVAL;
  65
  66         chan = cfg80211_wext_freq(wdev->wiphy, freq);
  67         if (chan && IS_ERR(chan))
  68                 return PTR_ERR(chan);
  69
  70         if (chan && (chan->flags & IEEE80211_CHAN_DISABLED))
  71                 return -EINVAL;
  72
  73         cfg80211_lock_rdev(rdev);
  74         wdev_lock(wdev);
  75
  76         if (wdev->sme_state != CFG80211_SME_IDLE) {
  77                 bool event = true;
  78
  79                 if (wdev->wext.connect.channel == chan) {
  80                         err = 0;
  81                         goto out;
  82                 }
  83
  84                 /* if SSID set, we'll try right again, avoid event */
  85                 if (wdev->wext.connect.ssid_len)
  86                         event = false;
  87                 err = __cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
  88                                             dev, WLAN_REASON_DEAUTH_LEAVING,
  89                                             event);
  90                 if (err)
  91                         goto out;
  92         }
  93
  94
  95         wdev->wext.connect.channel = chan;
  96
  97         /* SSID is not set, we just want to switch channel */
  98         if (wdev->wext.connect.ssid_len && chan) {
  99                 err = -EOPNOTSUPP;
 100                 if (rdev->ops->set_channel)
 101                         err = rdev->ops->set_channel(wdev->wiphy, chan,
 102                                                      NL80211_CHAN_NO_HT);
 103                 goto out;
 104         }
 105
 106         err = cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
 107  out:
 108         wdev_unlock(wdev);
 109         cfg80211_unlock_rdev(rdev);
 110         return err;
 111 }
 112
 113 int cfg80211_mgd_wext_giwfreq(struct net_device *dev,
 114                               struct iw_request_info *info,
 115                               struct iw_freq *freq, char *extra)
 116 {
 117         struct wireless_dev *wdev = dev->ieee80211_ptr;
 118         struct ieee80211_channel *chan = NULL;
 119
 120         /* call only for station! */
 121         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 122                 return -EINVAL;
 123
 124         wdev_lock(wdev);
 125         if (wdev->current_bss)
 126                 chan = wdev->current_bss->pub.channel;
 127         else if (wdev->wext.connect.channel)
 128                 chan = wdev->wext.connect.channel;
 129         wdev_unlock(wdev);
 130
 131         if (chan) {
 132                 freq->m = chan->center_freq;
 133                 freq->e = 6;
 134                 return 0;
 135         }
 136
 137         /* no channel if not joining */
 138         return -EINVAL;
 139 }
 140
 141 int cfg80211_mgd_wext_siwessid(struct net_device *dev,
 142                                struct iw_request_info *info,
 143                                struct iw_point *data, char *ssid)
 144 {
 145         struct wireless_dev *wdev = dev->ieee80211_ptr;
 146         size_t len = data->length;
 147         int err;
 148
 149         /* call only for station! */
 150         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 151                 return -EINVAL;
 152
 153         if (!data->flags)
 154                 len = 0;
 155
 156         /* iwconfig uses nul termination in SSID.. */
 157         if (len > 0 && ssid[len - 1] == '\0')
 158                 len--;
 159
 160         cfg80211_lock_rdev(wiphy_to_dev(wdev->wiphy));
 161         wdev_lock(wdev);
 162
 163         err = 0;
 164
 165         if (wdev->sme_state != CFG80211_SME_IDLE) {
 166                 bool event = true;
 167
 168                 if (wdev->wext.connect.ssid && len &&
 169                     len == wdev->wext.connect.ssid_len &&
 170                     memcmp(wdev->wext.connect.ssid, ssid, len) == 0)
 171                         goto out;
 172
 173                 /* if SSID set now, we'll try to connect, avoid event */
 174                 if (len)
 175                         event = false;
 176                 err = __cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
 177                                             dev, WLAN_REASON_DEAUTH_LEAVING,
 178                                             event);
 179                 if (err)
 180                         goto out;
 181         }
 182
 183         wdev->wext.connect.ssid = wdev->wext.ssid;
 184         memcpy(wdev->wext.ssid, ssid, len);
 185         wdev->wext.connect.ssid_len = len;
 186
 187         wdev->wext.connect.crypto.control_port = false;
 188
 189         err = cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
 190  out:
 191         wdev_unlock(wdev);
 192         cfg80211_unlock_rdev(wiphy_to_dev(wdev->wiphy));
 193         return err;
 194 }
 195
 196 int cfg80211_mgd_wext_giwessid(struct net_device *dev,
 197                                struct iw_request_info *info,
 198                                struct iw_point *data, char *ssid)
 199 {
 200         struct wireless_dev *wdev = dev->ieee80211_ptr;
 201
 202         /* call only for station! */
 203         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 204                 return -EINVAL;
 205
 206         data->flags = 0;
 207
 208         wdev_lock(wdev);
 209         if (wdev->wext.connect.ssid && wdev->wext.connect.ssid_len) {
 210                 data->flags = 1;
 211                 data->length = wdev->wext.connect.ssid_len;
 212                 memcpy(ssid, wdev->wext.connect.ssid, data->length);
 213         } else
 214                 data->flags = 0;
 215         wdev_unlock(wdev);
 216
 217         return 0;
 218 }
 219
 220 int cfg80211_mgd_wext_siwap(struct net_device *dev,
 221                             struct iw_request_info *info,
 222                             struct sockaddr *ap_addr, char *extra)
 223 {
 224         struct wireless_dev *wdev = dev->ieee80211_ptr;
 225         u8 *bssid = ap_addr->sa_data;
 226         int err;
 227
 228         /* call only for station! */
 229         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 230                 return -EINVAL;
 231
 232         if (ap_addr->sa_family != ARPHRD_ETHER)
 233                 return -EINVAL;
 234
 235         /* automatic mode */
 236         if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
 237                 bssid = NULL;
 238
 239         cfg80211_lock_rdev(wiphy_to_dev(wdev->wiphy));
 240         wdev_lock(wdev);
 241
 242         if (wdev->sme_state != CFG80211_SME_IDLE) {
 243                 err = 0;
 244                 /* both automatic */
 245                 if (!bssid && !wdev->wext.connect.bssid)
 246                         goto out;
 247
 248                 /* fixed already - and no change */
 249                 if (wdev->wext.connect.bssid && bssid &&
 250                     compare_ether_addr(bssid, wdev->wext.connect.bssid) == 0)
 251                         goto out;
 252
 253                 err = __cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
 254                                             dev, WLAN_REASON_DEAUTH_LEAVING,
 255                                             false);
 256                 if (err)
 257                         goto out;
 258         }
 259
 260         if (bssid) {
 261                 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
 262                 wdev->wext.connect.bssid = wdev->wext.bssid;
 263         } else
 264                 wdev->wext.connect.bssid = NULL;
 265
 266         err = cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
 267  out:
 268         wdev_unlock(wdev);
 269         cfg80211_unlock_rdev(wiphy_to_dev(wdev->wiphy));
 270         return err;
 271 }
 272
 273 int cfg80211_mgd_wext_giwap(struct net_device *dev,
 274                             struct iw_request_info *info,
 275                             struct sockaddr *ap_addr, char *extra)
 276 {
 277         struct wireless_dev *wdev = dev->ieee80211_ptr;
 278
 279         /* call only for station! */
 280         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 281                 return -EINVAL;
 282
 283         ap_addr->sa_family = ARPHRD_ETHER;
 284
 285         wdev_lock(wdev);
 286         if (wdev->current_bss)
 287                 memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
 288         else if (wdev->wext.connect.bssid)
 289                 memcpy(ap_addr->sa_data, wdev->wext.connect.bssid, ETH_ALEN);
 290         else
 291                 memset(ap_addr->sa_data, 0, ETH_ALEN);
 292         wdev_unlock(wdev);
 293
 294         return 0;
 295 }
 296
 297 int cfg80211_wext_siwgenie(struct net_device *dev,
 298                            struct iw_request_info *info,
 299                            struct iw_point *data, char *extra)
 300 {
 301         struct wireless_dev *wdev = dev->ieee80211_ptr;
 302         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 303         u8 *ie = extra;
 304         int ie_len = data->length, err;
 305
 306         if (wdev->iftype != NL80211_IFTYPE_STATION)
 307                 return -EOPNOTSUPP;
 308
 309         if (!ie_len)
 310                 ie = NULL;
 311
 312         wdev_lock(wdev);
 313
 314         /* no change */
 315         err = 0;
 316         if (wdev->wext.ie_len == ie_len &&
 317             memcmp(wdev->wext.ie, ie, ie_len) == 0)
 318                 goto out;
 319
 320         if (ie_len) {
 321                 ie = kmemdup(extra, ie_len, GFP_KERNEL);
 322                 if (!ie) {
 323                         err = -ENOMEM;
 324                         goto out;
 325                 }
 326         } else
 327                 ie = NULL;
 328
 329         kfree(wdev->wext.ie);
 330         wdev->wext.ie = ie;
 331         wdev->wext.ie_len = ie_len;
 332
 333         if (wdev->sme_state != CFG80211_SME_IDLE) {
 334                 err = __cfg80211_disconnect(rdev, dev,
 335                                             WLAN_REASON_DEAUTH_LEAVING, false);
 336                 if (err)
 337                         goto out;
 338         }
 339
 340         /* userspace better not think we'll reconnect */
 341         err = 0;
 342  out:
 343         wdev_unlock(wdev);
 344         return err;
 345 }
 346 EXPORT_SYMBOL_GPL(cfg80211_wext_siwgenie);
 347
 348 int cfg80211_wext_siwmlme(struct net_device *dev,
 349                           struct iw_request_info *info,
 350                           struct iw_point *data, char *extra)
 351 {
 352         struct wireless_dev *wdev = dev->ieee80211_ptr;
 353         struct iw_mlme *mlme = (struct iw_mlme *)extra;
 354         struct cfg80211_registered_device *rdev;
 355         int err;
 356
 357         if (!wdev)
 358                 return -EOPNOTSUPP;
 359
 360         rdev = wiphy_to_dev(wdev->wiphy);
 361
 362         if (wdev->iftype != NL80211_IFTYPE_STATION)
 363                 return -EINVAL;
 364
 365         if (mlme->addr.sa_family != ARPHRD_ETHER)
 366                 return -EINVAL;
 367
 368         wdev_lock(wdev);
 369         switch (mlme->cmd) {
 370         case IW_MLME_DEAUTH:
 371         case IW_MLME_DISASSOC:
 372                 err = __cfg80211_disconnect(rdev, dev, mlme->reason_code,
 373                                             true);
 374                 break;
 375         default:
 376                 err = -EOPNOTSUPP;
 377                 break;
 378         }
 379         wdev_unlock(wdev);
 380
 381         return err;
 382 }
 383 EXPORT_SYMBOL_GPL(cfg80211_wext_siwmlme);