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   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 /* temporary symbol - mark GPL - in the future the handler won't be */
 196 EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_siwessid);
 197
 198 int cfg80211_mgd_wext_giwessid(struct net_device *dev,
 199                                struct iw_request_info *info,
 200                                struct iw_point *data, char *ssid)
 201 {
 202         struct wireless_dev *wdev = dev->ieee80211_ptr;
 203
 204         /* call only for station! */
 205         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 206                 return -EINVAL;
 207
 208         data->flags = 0;
 209
 210         wdev_lock(wdev);
 211         if (wdev->wext.connect.ssid && wdev->wext.connect.ssid_len) {
 212                 data->flags = 1;
 213                 data->length = wdev->wext.connect.ssid_len;
 214                 memcpy(ssid, wdev->wext.connect.ssid, data->length);
 215         } else
 216                 data->flags = 0;
 217         wdev_unlock(wdev);
 218
 219         return 0;
 220 }
 221 /* temporary symbol - mark GPL - in the future the handler won't be */
 222 EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_giwessid);
 223
 224 int cfg80211_mgd_wext_siwap(struct net_device *dev,
 225                             struct iw_request_info *info,
 226                             struct sockaddr *ap_addr, char *extra)
 227 {
 228         struct wireless_dev *wdev = dev->ieee80211_ptr;
 229         u8 *bssid = ap_addr->sa_data;
 230         int err;
 231
 232         /* call only for station! */
 233         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 234                 return -EINVAL;
 235
 236         if (ap_addr->sa_family != ARPHRD_ETHER)
 237                 return -EINVAL;
 238
 239         /* automatic mode */
 240         if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
 241                 bssid = NULL;
 242
 243         cfg80211_lock_rdev(wiphy_to_dev(wdev->wiphy));
 244         wdev_lock(wdev);
 245
 246         if (wdev->sme_state != CFG80211_SME_IDLE) {
 247                 err = 0;
 248                 /* both automatic */
 249                 if (!bssid && !wdev->wext.connect.bssid)
 250                         goto out;
 251
 252                 /* fixed already - and no change */
 253                 if (wdev->wext.connect.bssid && bssid &&
 254                     compare_ether_addr(bssid, wdev->wext.connect.bssid) == 0)
 255                         goto out;
 256
 257                 err = __cfg80211_disconnect(wiphy_to_dev(wdev->wiphy),
 258                                             dev, WLAN_REASON_DEAUTH_LEAVING,
 259                                             false);
 260                 if (err)
 261                         goto out;
 262         }
 263
 264         if (bssid) {
 265                 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
 266                 wdev->wext.connect.bssid = wdev->wext.bssid;
 267         } else
 268                 wdev->wext.connect.bssid = NULL;
 269
 270         err = cfg80211_mgd_wext_connect(wiphy_to_dev(wdev->wiphy), wdev);
 271  out:
 272         wdev_unlock(wdev);
 273         cfg80211_unlock_rdev(wiphy_to_dev(wdev->wiphy));
 274         return err;
 275 }
 276
 277 int cfg80211_mgd_wext_giwap(struct net_device *dev,
 278                             struct iw_request_info *info,
 279                             struct sockaddr *ap_addr, char *extra)
 280 {
 281         struct wireless_dev *wdev = dev->ieee80211_ptr;
 282
 283         /* call only for station! */
 284         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 285                 return -EINVAL;
 286
 287         ap_addr->sa_family = ARPHRD_ETHER;
 288
 289         wdev_lock(wdev);
 290         if (wdev->current_bss)
 291                 memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
 292         else if (wdev->wext.connect.bssid)
 293                 memcpy(ap_addr->sa_data, wdev->wext.connect.bssid, ETH_ALEN);
 294         else
 295                 memset(ap_addr->sa_data, 0, ETH_ALEN);
 296         wdev_unlock(wdev);
 297
 298         return 0;
 299 }
 300
 301 int cfg80211_wext_siwgenie(struct net_device *dev,
 302                            struct iw_request_info *info,
 303                            struct iw_point *data, char *extra)
 304 {
 305         struct wireless_dev *wdev = dev->ieee80211_ptr;
 306         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 307         u8 *ie = extra;
 308         int ie_len = data->length, err;
 309
 310         if (wdev->iftype != NL80211_IFTYPE_STATION)
 311                 return -EOPNOTSUPP;
 312
 313         if (!ie_len)
 314                 ie = NULL;
 315
 316         wdev_lock(wdev);
 317
 318         /* no change */
 319         err = 0;
 320         if (wdev->wext.ie_len == ie_len &&
 321             memcmp(wdev->wext.ie, ie, ie_len) == 0)
 322                 goto out;
 323
 324         if (ie_len) {
 325                 ie = kmemdup(extra, ie_len, GFP_KERNEL);
 326                 if (!ie) {
 327                         err = -ENOMEM;
 328                         goto out;
 329                 }
 330         } else
 331                 ie = NULL;
 332
 333         kfree(wdev->wext.ie);
 334         wdev->wext.ie = ie;
 335         wdev->wext.ie_len = ie_len;
 336
 337         if (wdev->sme_state != CFG80211_SME_IDLE) {
 338                 err = __cfg80211_disconnect(rdev, dev,
 339                                             WLAN_REASON_DEAUTH_LEAVING, false);
 340                 if (err)
 341                         goto out;
 342         }
 343
 344         /* userspace better not think we'll reconnect */
 345         err = 0;
 346  out:
 347         wdev_unlock(wdev);
 348         return err;
 349 }
 350 EXPORT_SYMBOL_GPL(cfg80211_wext_siwgenie);
 351
 352 int cfg80211_wext_siwmlme(struct net_device *dev,
 353                           struct iw_request_info *info,
 354                           struct iw_point *data, char *extra)
 355 {
 356         struct wireless_dev *wdev = dev->ieee80211_ptr;
 357         struct iw_mlme *mlme = (struct iw_mlme *)extra;
 358         struct cfg80211_registered_device *rdev;
 359         int err;
 360
 361         if (!wdev)
 362                 return -EOPNOTSUPP;
 363
 364         rdev = wiphy_to_dev(wdev->wiphy);
 365
 366         if (wdev->iftype != NL80211_IFTYPE_STATION)
 367                 return -EINVAL;
 368
 369         if (mlme->addr.sa_family != ARPHRD_ETHER)
 370                 return -EINVAL;
 371
 372         wdev_lock(wdev);
 373         switch (mlme->cmd) {
 374         case IW_MLME_DEAUTH:
 375         case IW_MLME_DISASSOC:
 376                 err = __cfg80211_disconnect(rdev, dev, mlme->reason_code,
 377                                             true);
 378                 break;
 379         default:
 380                 err = -EOPNOTSUPP;
 381                 break;
 382         }
 383         wdev_unlock(wdev);
 384
 385         return err;
 386 }
 387 EXPORT_SYMBOL_GPL(cfg80211_wext_siwmlme);