net/wireless/mlme.c

   1 /*
   2  * cfg80211 MLME SAP interface
   3  *
   4  * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/module.h>
   9 #include <linux/netdevice.h>
  10 #include <linux/nl80211.h>
  11 #include <linux/wireless.h>
  12 #include <net/cfg80211.h>
  13 #include <net/iw_handler.h>
  14 #include "core.h"
  15 #include "nl80211.h"
  16
  17 void cfg80211_send_rx_auth(struct net_device *dev, const u8 *buf, size_t len)
  18 {
  19         struct wireless_dev *wdev = dev->ieee80211_ptr;
  20         struct wiphy *wiphy = wdev->wiphy;
  21         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
  22         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
  23         u8 *bssid = mgmt->bssid;
  24         int i;
  25         u16 status = le16_to_cpu(mgmt->u.auth.status_code);
  26         bool done = false;
  27
  28         wdev_lock(wdev);
  29
  30         for (i = 0; i < MAX_AUTH_BSSES; i++) {
  31                 if (wdev->authtry_bsses[i] &&
  32                     memcmp(wdev->authtry_bsses[i]->pub.bssid, bssid,
  33                                                         ETH_ALEN) == 0) {
  34                         if (status == WLAN_STATUS_SUCCESS) {
  35                                 wdev->auth_bsses[i] = wdev->authtry_bsses[i];
  36                         } else {
  37                                 cfg80211_unhold_bss(wdev->authtry_bsses[i]);
  38                                 cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
  39                         }
  40                         wdev->authtry_bsses[i] = NULL;
  41                         done = true;
  42                         break;
  43                 }
  44         }
  45
  46         WARN_ON(!done);
  47
  48         nl80211_send_rx_auth(rdev, dev, buf, len, GFP_KERNEL);
  49         cfg80211_sme_rx_auth(dev, buf, len);
  50
  51         wdev_unlock(wdev);
  52 }
  53 EXPORT_SYMBOL(cfg80211_send_rx_auth);
  54
  55 void cfg80211_send_rx_assoc(struct net_device *dev, const u8 *buf, size_t len)
  56 {
  57         u16 status_code;
  58         struct wireless_dev *wdev = dev->ieee80211_ptr;
  59         struct wiphy *wiphy = wdev->wiphy;
  60         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
  61         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
  62         u8 *ie = mgmt->u.assoc_resp.variable;
  63         int i, ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
  64         struct cfg80211_internal_bss *bss = NULL;
  65
  66         wdev_lock(wdev);
  67
  68         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
  69
  70         /*
  71          * This is a bit of a hack, we don't notify userspace of
  72          * a (re-)association reply if we tried to send a reassoc
  73          * and got a reject -- we only try again with an assoc
  74          * frame instead of reassoc.
  75          */
  76         if (status_code != WLAN_STATUS_SUCCESS && wdev->conn &&
  77             cfg80211_sme_failed_reassoc(wdev))
  78                 goto out;
  79
  80         nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL);
  81
  82         if (status_code == WLAN_STATUS_SUCCESS) {
  83                 for (i = 0; i < MAX_AUTH_BSSES; i++) {
  84                         if (!wdev->auth_bsses[i])
  85                                 continue;
  86                         if (memcmp(wdev->auth_bsses[i]->pub.bssid, mgmt->bssid,
  87                                    ETH_ALEN) == 0) {
  88                                 bss = wdev->auth_bsses[i];
  89                                 wdev->auth_bsses[i] = NULL;
  90                                 /* additional reference to drop hold */
  91                                 cfg80211_ref_bss(bss);
  92                                 break;
  93                         }
  94                 }
  95
  96                 /*
  97                  * We might be coming here because the driver reported
  98                  * a successful association at the same time as the
  99                  * user requested a deauth. In that case, we will have
 100                  * removed the BSS from the auth_bsses list due to the
 101                  * deauth request when the assoc response makes it. If
 102                  * the two code paths acquire the lock the other way
 103                  * around, that's just the standard situation of a
 104                  * deauth being requested while connected.
 105                  */
 106                 if (!bss)
 107                         goto out;
 108         } else if (wdev->conn) {
 109                 cfg80211_sme_failed_assoc(wdev);
 110                 /*
 111                  * do not call connect_result() now because the
 112                  * sme will schedule work that does it later.
 113                  */
 114                 goto out;
 115         }
 116
 117         if (!wdev->conn && wdev->sme_state == CFG80211_SME_IDLE) {
 118                 /*
 119                  * This is for the userspace SME, the CONNECTING
 120                  * state will be changed to CONNECTED by
 121                  * __cfg80211_connect_result() below.
 122                  */
 123                 wdev->sme_state = CFG80211_SME_CONNECTING;
 124         }
 125
 126         /* this consumes one bss reference (unless bss is NULL) */
 127         __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
 128                                   status_code,
 129                                   status_code == WLAN_STATUS_SUCCESS,
 130                                   bss ? &bss->pub : NULL);
 131         /* drop hold now, and also reference acquired above */
 132         if (bss) {
 133                 cfg80211_unhold_bss(bss);
 134                 cfg80211_put_bss(&bss->pub);
 135         }
 136
 137  out:
 138         wdev_unlock(wdev);
 139 }
 140 EXPORT_SYMBOL(cfg80211_send_rx_assoc);
 141
 142 void __cfg80211_send_deauth(struct net_device *dev,
 143                                    const u8 *buf, size_t len)
 144 {
 145         struct wireless_dev *wdev = dev->ieee80211_ptr;
 146         struct wiphy *wiphy = wdev->wiphy;
 147         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 148         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 149         const u8 *bssid = mgmt->bssid;
 150         int i;
 151         bool found = false;
 152
 153         ASSERT_WDEV_LOCK(wdev);
 154
 155         if (wdev->current_bss &&
 156             memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) {
 157                 cfg80211_unhold_bss(wdev->current_bss);
 158                 cfg80211_put_bss(&wdev->current_bss->pub);
 159                 wdev->current_bss = NULL;
 160                 found = true;
 161         } else for (i = 0; i < MAX_AUTH_BSSES; i++) {
 162                 if (wdev->auth_bsses[i] &&
 163                     memcmp(wdev->auth_bsses[i]->pub.bssid, bssid, ETH_ALEN) == 0) {
 164                         cfg80211_unhold_bss(wdev->auth_bsses[i]);
 165                         cfg80211_put_bss(&wdev->auth_bsses[i]->pub);
 166                         wdev->auth_bsses[i] = NULL;
 167                         found = true;
 168                         break;
 169                 }
 170                 if (wdev->authtry_bsses[i] &&
 171                     memcmp(wdev->authtry_bsses[i]->pub.bssid, bssid, ETH_ALEN) == 0) {
 172                         cfg80211_unhold_bss(wdev->authtry_bsses[i]);
 173                         cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
 174                         wdev->authtry_bsses[i] = NULL;
 175                         found = true;
 176                         break;
 177                 }
 178         }
 179
 180         if (!found)
 181                 return;
 182
 183         nl80211_send_deauth(rdev, dev, buf, len, GFP_KERNEL);
 184
 185         if (wdev->sme_state == CFG80211_SME_CONNECTED) {
 186                 u16 reason_code;
 187                 bool from_ap;
 188
 189                 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
 190
 191                 from_ap = memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0;
 192                 __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
 193         } else if (wdev->sme_state == CFG80211_SME_CONNECTING) {
 194                 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
 195                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 196                                           false, NULL);
 197         }
 198 }
 199 EXPORT_SYMBOL(__cfg80211_send_deauth);
 200
 201 void cfg80211_send_deauth(struct net_device *dev, const u8 *buf, size_t len)
 202 {
 203         struct wireless_dev *wdev = dev->ieee80211_ptr;
 204
 205         wdev_lock(wdev);
 206         __cfg80211_send_deauth(dev, buf, len);
 207         wdev_unlock(wdev);
 208 }
 209 EXPORT_SYMBOL(cfg80211_send_deauth);
 210
 211 void __cfg80211_send_disassoc(struct net_device *dev,
 212                                      const u8 *buf, size_t len)
 213 {
 214         struct wireless_dev *wdev = dev->ieee80211_ptr;
 215         struct wiphy *wiphy = wdev->wiphy;
 216         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 217         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 218         const u8 *bssid = mgmt->bssid;
 219         int i;
 220         u16 reason_code;
 221         bool from_ap;
 222         bool done = false;
 223
 224         ASSERT_WDEV_LOCK(wdev);
 225
 226         nl80211_send_disassoc(rdev, dev, buf, len, GFP_KERNEL);
 227
 228         if (wdev->sme_state != CFG80211_SME_CONNECTED)
 229                 return;
 230
 231         if (wdev->current_bss &&
 232             memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) {
 233                 for (i = 0; i < MAX_AUTH_BSSES; i++) {
 234                         if (wdev->authtry_bsses[i] || wdev->auth_bsses[i])
 235                                 continue;
 236                         wdev->auth_bsses[i] = wdev->current_bss;
 237                         wdev->current_bss = NULL;
 238                         done = true;
 239                         cfg80211_sme_disassoc(dev, i);
 240                         break;
 241                 }
 242                 WARN_ON(!done);
 243         } else
 244                 WARN_ON(1);
 245
 246
 247         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
 248
 249         from_ap = memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0;
 250         __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
 251 }
 252 EXPORT_SYMBOL(__cfg80211_send_disassoc);
 253
 254 void cfg80211_send_disassoc(struct net_device *dev, const u8 *buf, size_t len)
 255 {
 256         struct wireless_dev *wdev = dev->ieee80211_ptr;
 257
 258         wdev_lock(wdev);
 259         __cfg80211_send_disassoc(dev, buf, len);
 260         wdev_unlock(wdev);
 261 }
 262 EXPORT_SYMBOL(cfg80211_send_disassoc);
 263
 264 static void __cfg80211_auth_remove(struct wireless_dev *wdev, const u8 *addr)
 265 {
 266         int i;
 267         bool done = false;
 268
 269         ASSERT_WDEV_LOCK(wdev);
 270
 271         for (i = 0; addr && i < MAX_AUTH_BSSES; i++) {
 272                 if (wdev->authtry_bsses[i] &&
 273                     memcmp(wdev->authtry_bsses[i]->pub.bssid,
 274                            addr, ETH_ALEN) == 0) {
 275                         cfg80211_unhold_bss(wdev->authtry_bsses[i]);
 276                         cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
 277                         wdev->authtry_bsses[i] = NULL;
 278                         done = true;
 279                         break;
 280                 }
 281         }
 282
 283         WARN_ON(!done);
 284 }
 285
 286 void __cfg80211_auth_canceled(struct net_device *dev, const u8 *addr)
 287 {
 288         __cfg80211_auth_remove(dev->ieee80211_ptr, addr);
 289 }
 290 EXPORT_SYMBOL(__cfg80211_auth_canceled);
 291
 292 void cfg80211_send_auth_timeout(struct net_device *dev, const u8 *addr)
 293 {
 294         struct wireless_dev *wdev = dev->ieee80211_ptr;
 295         struct wiphy *wiphy = wdev->wiphy;
 296         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 297
 298         wdev_lock(wdev);
 299
 300         nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
 301         if (wdev->sme_state == CFG80211_SME_CONNECTING)
 302                 __cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
 303                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 304                                           false, NULL);
 305
 306         __cfg80211_auth_remove(wdev, addr);
 307
 308         wdev_unlock(wdev);
 309 }
 310 EXPORT_SYMBOL(cfg80211_send_auth_timeout);
 311
 312 void cfg80211_send_assoc_timeout(struct net_device *dev, const u8 *addr)
 313 {
 314         struct wireless_dev *wdev = dev->ieee80211_ptr;
 315         struct wiphy *wiphy = wdev->wiphy;
 316         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 317         int i;
 318         bool done = false;
 319
 320         wdev_lock(wdev);
 321
 322         nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL);
 323         if (wdev->sme_state == CFG80211_SME_CONNECTING)
 324                 __cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
 325                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 326                                           false, NULL);
 327
 328         for (i = 0; addr && i < MAX_AUTH_BSSES; i++) {
 329                 if (wdev->auth_bsses[i] &&
 330                     memcmp(wdev->auth_bsses[i]->pub.bssid,
 331                            addr, ETH_ALEN) == 0) {
 332                         cfg80211_unhold_bss(wdev->auth_bsses[i]);
 333                         cfg80211_put_bss(&wdev->auth_bsses[i]->pub);
 334                         wdev->auth_bsses[i] = NULL;
 335                         done = true;
 336                         break;
 337                 }
 338         }
 339
 340         WARN_ON(!done);
 341
 342         wdev_unlock(wdev);
 343 }
 344 EXPORT_SYMBOL(cfg80211_send_assoc_timeout);
 345
 346 void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
 347                                   enum nl80211_key_type key_type, int key_id,
 348                                   const u8 *tsc, gfp_t gfp)
 349 {
 350         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 351         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 352 #ifdef CONFIG_CFG80211_WEXT
 353         union iwreq_data wrqu;
 354         char *buf = kmalloc(128, gfp);
 355
 356         if (buf) {
 357                 sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
 358                         "keyid=%d %scast addr=%pM)", key_id,
 359                         key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni",
 360                         addr);
 361                 memset(&wrqu, 0, sizeof(wrqu));
 362                 wrqu.data.length = strlen(buf);
 363                 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 364                 kfree(buf);
 365         }
 366 #endif
 367
 368         nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
 369 }
 370 EXPORT_SYMBOL(cfg80211_michael_mic_failure);
 371
 372 /* some MLME handling for userspace SME */
 373 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 374                          struct net_device *dev,
 375                          struct ieee80211_channel *chan,
 376                          enum nl80211_auth_type auth_type,
 377                          const u8 *bssid,
 378                          const u8 *ssid, int ssid_len,
 379                          const u8 *ie, int ie_len,
 380                          const u8 *key, int key_len, int key_idx)
 381 {
 382         struct wireless_dev *wdev = dev->ieee80211_ptr;
 383         struct cfg80211_auth_request req;
 384         struct cfg80211_internal_bss *bss;
 385         int i, err, slot = -1, nfree = 0;
 386
 387         ASSERT_WDEV_LOCK(wdev);
 388
 389         if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
 390                 if (!key || !key_len || key_idx < 0 || key_idx > 4)
 391                         return -EINVAL;
 392
 393         if (wdev->current_bss &&
 394             memcmp(bssid, wdev->current_bss->pub.bssid, ETH_ALEN) == 0)
 395                 return -EALREADY;
 396
 397         for (i = 0; i < MAX_AUTH_BSSES; i++) {
 398                 if (wdev->authtry_bsses[i] &&
 399                     memcmp(bssid, wdev->authtry_bsses[i]->pub.bssid,
 400                                                 ETH_ALEN) == 0)
 401                         return -EALREADY;
 402                 if (wdev->auth_bsses[i] &&
 403                     memcmp(bssid, wdev->auth_bsses[i]->pub.bssid,
 404                                                 ETH_ALEN) == 0)
 405                         return -EALREADY;
 406         }
 407
 408         memset(&req, 0, sizeof(req));
 409
 410         req.ie = ie;
 411         req.ie_len = ie_len;
 412         req.auth_type = auth_type;
 413         req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
 414                                    WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 415         req.key = key;
 416         req.key_len = key_len;
 417         req.key_idx = key_idx;
 418         if (!req.bss)
 419                 return -ENOENT;
 420
 421         bss = bss_from_pub(req.bss);
 422
 423         for (i = 0; i < MAX_AUTH_BSSES; i++) {
 424                 if (!wdev->auth_bsses[i] && !wdev->authtry_bsses[i]) {
 425                         slot = i;
 426                         nfree++;
 427                 }
 428         }
 429
 430         /* we need one free slot for disassoc and one for this auth */
 431         if (nfree < 2) {
 432                 err = -ENOSPC;
 433                 goto out;
 434         }
 435
 436         wdev->authtry_bsses[slot] = bss;
 437         cfg80211_hold_bss(bss);
 438
 439         err = rdev->ops->auth(&rdev->wiphy, dev, &req);
 440         if (err) {
 441                 wdev->authtry_bsses[slot] = NULL;
 442                 cfg80211_unhold_bss(bss);
 443         }
 444
 445  out:
 446         if (err)
 447                 cfg80211_put_bss(req.bss);
 448         return err;
 449 }
 450
 451 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 452                        struct net_device *dev, struct ieee80211_channel *chan,
 453                        enum nl80211_auth_type auth_type, const u8 *bssid,
 454                        const u8 *ssid, int ssid_len,
 455                        const u8 *ie, int ie_len,
 456                        const u8 *key, int key_len, int key_idx)
 457 {
 458         int err;
 459
 460         wdev_lock(dev->ieee80211_ptr);
 461         err = __cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
 462                                    ssid, ssid_len, ie, ie_len,
 463                                    key, key_len, key_idx);
 464         wdev_unlock(dev->ieee80211_ptr);
 465
 466         return err;
 467 }
 468
 469 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 470                           struct net_device *dev,
 471                           struct ieee80211_channel *chan,
 472                           const u8 *bssid, const u8 *prev_bssid,
 473                           const u8 *ssid, int ssid_len,
 474                           const u8 *ie, int ie_len, bool use_mfp,
 475                           struct cfg80211_crypto_settings *crypt)
 476 {
 477         struct wireless_dev *wdev = dev->ieee80211_ptr;
 478         struct cfg80211_assoc_request req;
 479         struct cfg80211_internal_bss *bss;
 480         int i, err, slot = -1;
 481         bool was_connected = false;
 482
 483         ASSERT_WDEV_LOCK(wdev);
 484
 485         memset(&req, 0, sizeof(req));
 486
 487         if (wdev->current_bss && prev_bssid &&
 488             memcmp(wdev->current_bss->pub.bssid, prev_bssid, ETH_ALEN) == 0) {
 489                 /*
 490                  * Trying to reassociate: Allow this to proceed and let the old
 491                  * association to be dropped when the new one is completed.
 492                  */
 493                 if (wdev->sme_state == CFG80211_SME_CONNECTED) {
 494                         was_connected = true;
 495                         wdev->sme_state = CFG80211_SME_CONNECTING;
 496                 }
 497         } else if (wdev->current_bss)
 498                 return -EALREADY;
 499
 500         req.ie = ie;
 501         req.ie_len = ie_len;
 502         memcpy(&req.crypto, crypt, sizeof(req.crypto));
 503         req.use_mfp = use_mfp;
 504         req.prev_bssid = prev_bssid;
 505         req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
 506                                    WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 507         if (!req.bss) {
 508                 if (was_connected)
 509                         wdev->sme_state = CFG80211_SME_CONNECTED;
 510                 return -ENOENT;
 511         }
 512
 513         bss = bss_from_pub(req.bss);
 514
 515         for (i = 0; i < MAX_AUTH_BSSES; i++) {
 516                 if (bss == wdev->auth_bsses[i]) {
 517                         slot = i;
 518                         break;
 519                 }
 520         }
 521
 522         if (slot < 0) {
 523                 err = -ENOTCONN;
 524                 goto out;
 525         }
 526
 527         err = rdev->ops->assoc(&rdev->wiphy, dev, &req);
 528  out:
 529         if (err && was_connected)
 530                 wdev->sme_state = CFG80211_SME_CONNECTED;
 531         /* still a reference in wdev->auth_bsses[slot] */
 532         cfg80211_put_bss(req.bss);
 533         return err;
 534 }
 535
 536 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 537                         struct net_device *dev,
 538                         struct ieee80211_channel *chan,
 539                         const u8 *bssid, const u8 *prev_bssid,
 540                         const u8 *ssid, int ssid_len,
 541                         const u8 *ie, int ie_len, bool use_mfp,
 542                         struct cfg80211_crypto_settings *crypt)
 543 {
 544         struct wireless_dev *wdev = dev->ieee80211_ptr;
 545         int err;
 546
 547         wdev_lock(wdev);
 548         err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
 549                                     ssid, ssid_len, ie, ie_len, use_mfp, crypt);
 550         wdev_unlock(wdev);
 551
 552         return err;
 553 }
 554
 555 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 556                            struct net_device *dev, const u8 *bssid,
 557                            const u8 *ie, int ie_len, u16 reason)
 558 {
 559         struct wireless_dev *wdev = dev->ieee80211_ptr;
 560         struct cfg80211_deauth_request req;
 561         int i;
 562
 563         ASSERT_WDEV_LOCK(wdev);
 564
 565         memset(&req, 0, sizeof(req));
 566         req.reason_code = reason;
 567         req.ie = ie;
 568         req.ie_len = ie_len;
 569         if (wdev->current_bss &&
 570             memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) {
 571                 req.bss = &wdev->current_bss->pub;
 572         } else for (i = 0; i < MAX_AUTH_BSSES; i++) {
 573                 if (wdev->auth_bsses[i] &&
 574                     memcmp(bssid, wdev->auth_bsses[i]->pub.bssid, ETH_ALEN) == 0) {
 575                         req.bss = &wdev->auth_bsses[i]->pub;
 576                         break;
 577                 }
 578                 if (wdev->authtry_bsses[i] &&
 579                     memcmp(bssid, wdev->authtry_bsses[i]->pub.bssid, ETH_ALEN) == 0) {
 580                         req.bss = &wdev->authtry_bsses[i]->pub;
 581                         break;
 582                 }
 583         }
 584
 585         if (!req.bss)
 586                 return -ENOTCONN;
 587
 588         return rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
 589 }
 590
 591 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 592                          struct net_device *dev, const u8 *bssid,
 593                          const u8 *ie, int ie_len, u16 reason)
 594 {
 595         struct wireless_dev *wdev = dev->ieee80211_ptr;
 596         int err;
 597
 598         wdev_lock(wdev);
 599         err = __cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason);
 600         wdev_unlock(wdev);
 601
 602         return err;
 603 }
 604
 605 static int __cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 606                                     struct net_device *dev, const u8 *bssid,
 607                                     const u8 *ie, int ie_len, u16 reason)
 608 {
 609         struct wireless_dev *wdev = dev->ieee80211_ptr;
 610         struct cfg80211_disassoc_request req;
 611
 612         ASSERT_WDEV_LOCK(wdev);
 613
 614         if (wdev->sme_state != CFG80211_SME_CONNECTED)
 615                 return -ENOTCONN;
 616
 617         if (WARN_ON(!wdev->current_bss))
 618                 return -ENOTCONN;
 619
 620         memset(&req, 0, sizeof(req));
 621         req.reason_code = reason;
 622         req.ie = ie;
 623         req.ie_len = ie_len;
 624         if (memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0)
 625                 req.bss = &wdev->current_bss->pub;
 626         else
 627                 return -ENOTCONN;
 628
 629         return rdev->ops->disassoc(&rdev->wiphy, dev, &req, wdev);
 630 }
 631
 632 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 633                            struct net_device *dev, const u8 *bssid,
 634                            const u8 *ie, int ie_len, u16 reason)
 635 {
 636         struct wireless_dev *wdev = dev->ieee80211_ptr;
 637         int err;
 638
 639         wdev_lock(wdev);
 640         err = __cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason);
 641         wdev_unlock(wdev);
 642
 643         return err;
 644 }
 645
 646 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 647                         struct net_device *dev)
 648 {
 649         struct wireless_dev *wdev = dev->ieee80211_ptr;
 650         struct cfg80211_deauth_request req;
 651         int i;
 652
 653         ASSERT_WDEV_LOCK(wdev);
 654
 655         if (!rdev->ops->deauth)
 656                 return;
 657
 658         memset(&req, 0, sizeof(req));
 659         req.reason_code = WLAN_REASON_DEAUTH_LEAVING;
 660         req.ie = NULL;
 661         req.ie_len = 0;
 662
 663         if (wdev->current_bss) {
 664                 req.bss = &wdev->current_bss->pub;
 665                 rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
 666                 if (wdev->current_bss) {
 667                         cfg80211_unhold_bss(wdev->current_bss);
 668                         cfg80211_put_bss(&wdev->current_bss->pub);
 669                         wdev->current_bss = NULL;
 670                 }
 671         }
 672
 673         for (i = 0; i < MAX_AUTH_BSSES; i++) {
 674                 if (wdev->auth_bsses[i]) {
 675                         req.bss = &wdev->auth_bsses[i]->pub;
 676                         rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
 677                         if (wdev->auth_bsses[i]) {
 678                                 cfg80211_unhold_bss(wdev->auth_bsses[i]);
 679                                 cfg80211_put_bss(&wdev->auth_bsses[i]->pub);
 680                                 wdev->auth_bsses[i] = NULL;
 681                         }
 682                 }
 683                 if (wdev->authtry_bsses[i]) {
 684                         req.bss = &wdev->authtry_bsses[i]->pub;
 685                         rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
 686                         if (wdev->authtry_bsses[i]) {
 687                                 cfg80211_unhold_bss(wdev->authtry_bsses[i]);
 688                                 cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
 689                                 wdev->authtry_bsses[i] = NULL;
 690                         }
 691                 }
 692         }
 693 }
 694
 695 void cfg80211_ready_on_channel(struct net_device *dev, u64 cookie,
 696                                struct ieee80211_channel *chan,
 697                                enum nl80211_channel_type channel_type,
 698                                unsigned int duration, gfp_t gfp)
 699 {
 700         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 701         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 702
 703         nl80211_send_remain_on_channel(rdev, dev, cookie, chan, channel_type,
 704                                        duration, gfp);
 705 }
 706 EXPORT_SYMBOL(cfg80211_ready_on_channel);
 707
 708 void cfg80211_remain_on_channel_expired(struct net_device *dev,
 709                                         u64 cookie,
 710                                         struct ieee80211_channel *chan,
 711                                         enum nl80211_channel_type channel_type,
 712                                         gfp_t gfp)
 713 {
 714         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 715         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 716
 717         nl80211_send_remain_on_channel_cancel(rdev, dev, cookie, chan,
 718                                               channel_type, gfp);
 719 }
 720 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
 721
 722 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
 723                       struct station_info *sinfo, gfp_t gfp)
 724 {
 725         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 726         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 727
 728         nl80211_send_sta_event(rdev, dev, mac_addr, sinfo, gfp);
 729 }
 730 EXPORT_SYMBOL(cfg80211_new_sta);
 731
 732 struct cfg80211_action_registration {
 733         struct list_head list;
 734
 735         u32 nlpid;
 736
 737         int match_len;
 738
 739         u8 match[];
 740 };
 741
 742 int cfg80211_mlme_register_action(struct wireless_dev *wdev, u32 snd_pid,
 743                                   const u8 *match_data, int match_len)
 744 {
 745         struct cfg80211_action_registration *reg, *nreg;
 746         int err = 0;
 747
 748         nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
 749         if (!nreg)
 750                 return -ENOMEM;
 751
 752         spin_lock_bh(&wdev->action_registrations_lock);
 753
 754         list_for_each_entry(reg, &wdev->action_registrations, list) {
 755                 int mlen = min(match_len, reg->match_len);
 756
 757                 if (memcmp(reg->match, match_data, mlen) == 0) {
 758                         err = -EALREADY;
 759                         break;
 760                 }
 761         }
 762
 763         if (err) {
 764                 kfree(nreg);
 765                 goto out;
 766         }
 767
 768         memcpy(nreg->match, match_data, match_len);
 769         nreg->match_len = match_len;
 770         nreg->nlpid = snd_pid;
 771         list_add(&nreg->list, &wdev->action_registrations);
 772
 773  out:
 774         spin_unlock_bh(&wdev->action_registrations_lock);
 775         return err;
 776 }
 777
 778 void cfg80211_mlme_unregister_actions(struct wireless_dev *wdev, u32 nlpid)
 779 {
 780         struct cfg80211_action_registration *reg, *tmp;
 781
 782         spin_lock_bh(&wdev->action_registrations_lock);
 783
 784         list_for_each_entry_safe(reg, tmp, &wdev->action_registrations, list) {
 785                 if (reg->nlpid == nlpid) {
 786                         list_del(&reg->list);
 787                         kfree(reg);
 788                 }
 789         }
 790
 791         spin_unlock_bh(&wdev->action_registrations_lock);
 792 }
 793
 794 void cfg80211_mlme_purge_actions(struct wireless_dev *wdev)
 795 {
 796         struct cfg80211_action_registration *reg, *tmp;
 797
 798         spin_lock_bh(&wdev->action_registrations_lock);
 799
 800         list_for_each_entry_safe(reg, tmp, &wdev->action_registrations, list) {
 801                 list_del(&reg->list);
 802                 kfree(reg);
 803         }
 804
 805         spin_unlock_bh(&wdev->action_registrations_lock);
 806 }
 807
 808 int cfg80211_mlme_action(struct cfg80211_registered_device *rdev,
 809                          struct net_device *dev,
 810                          struct ieee80211_channel *chan,
 811                          enum nl80211_channel_type channel_type,
 812                          const u8 *buf, size_t len, u64 *cookie)
 813 {
 814         struct wireless_dev *wdev = dev->ieee80211_ptr;
 815         const struct ieee80211_mgmt *mgmt;
 816
 817         if (rdev->ops->action == NULL)
 818                 return -EOPNOTSUPP;
 819         if (len < 24 + 1)
 820                 return -EINVAL;
 821
 822         mgmt = (const struct ieee80211_mgmt *) buf;
 823         if (!ieee80211_is_action(mgmt->frame_control))
 824                 return -EINVAL;
 825         if (mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
 826                 /* Verify that we are associated with the destination AP */
 827                 if (!wdev->current_bss ||
 828                     memcmp(wdev->current_bss->pub.bssid, mgmt->bssid,
 829                            ETH_ALEN) != 0 ||
 830                     memcmp(wdev->current_bss->pub.bssid, mgmt->da,
 831                            ETH_ALEN) != 0)
 832                         return -ENOTCONN;
 833         }
 834
 835         if (memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0)
 836                 return -EINVAL;
 837
 838         /* Transmit the Action frame as requested by user space */
 839         return rdev->ops->action(&rdev->wiphy, dev, chan, channel_type,
 840                                  buf, len, cookie);
 841 }
 842
 843 bool cfg80211_rx_action(struct net_device *dev, int freq, const u8 *buf,
 844                         size_t len, gfp_t gfp)
 845 {
 846         struct wireless_dev *wdev = dev->ieee80211_ptr;
 847         struct wiphy *wiphy = wdev->wiphy;
 848         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 849         struct cfg80211_action_registration *reg;
 850         const u8 *action_data;
 851         int action_data_len;
 852         bool result = false;
 853
 854         /* frame length - min size excluding category */
 855         action_data_len = len - (IEEE80211_MIN_ACTION_SIZE - 1);
 856
 857         /* action data starts with category */
 858         action_data = buf + IEEE80211_MIN_ACTION_SIZE - 1;
 859
 860         spin_lock_bh(&wdev->action_registrations_lock);
 861
 862         list_for_each_entry(reg, &wdev->action_registrations, list) {
 863                 if (reg->match_len > action_data_len)
 864                         continue;
 865
 866                 if (memcmp(reg->match, action_data, reg->match_len))
 867                         continue;
 868
 869                 /* found match! */
 870
 871                 /* Indicate the received Action frame to user space */
 872                 if (nl80211_send_action(rdev, dev, reg->nlpid, freq,
 873                                         buf, len, gfp))
 874                         continue;
 875
 876                 result = true;
 877                 break;
 878         }
 879
 880         spin_unlock_bh(&wdev->action_registrations_lock);
 881
 882         return result;
 883 }
 884 EXPORT_SYMBOL(cfg80211_rx_action);
 885
 886 void cfg80211_action_tx_status(struct net_device *dev, u64 cookie,
 887                                const u8 *buf, size_t len, bool ack, gfp_t gfp)
 888 {
 889         struct wireless_dev *wdev = dev->ieee80211_ptr;
 890         struct wiphy *wiphy = wdev->wiphy;
 891         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 892
 893         /* Indicate TX status of the Action frame to user space */
 894         nl80211_send_action_tx_status(rdev, dev, cookie, buf, len, ack, gfp);
 895 }
 896 EXPORT_SYMBOL(cfg80211_action_tx_status);