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                          bool local_state_change)
 382 {
 383         struct wireless_dev *wdev = dev->ieee80211_ptr;
 384         struct cfg80211_auth_request req;
 385         struct cfg80211_internal_bss *bss;
 386         int i, err, slot = -1, nfree = 0;
 387
 388         ASSERT_WDEV_LOCK(wdev);
 389
 390         if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
 391                 if (!key || !key_len || key_idx < 0 || key_idx > 4)
 392                         return -EINVAL;
 393
 394         if (wdev->current_bss &&
 395             memcmp(bssid, wdev->current_bss->pub.bssid, ETH_ALEN) == 0)
 396                 return -EALREADY;
 397
 398         for (i = 0; i < MAX_AUTH_BSSES; i++) {
 399                 if (wdev->authtry_bsses[i] &&
 400                     memcmp(bssid, wdev->authtry_bsses[i]->pub.bssid,
 401                                                 ETH_ALEN) == 0)
 402                         return -EALREADY;
 403                 if (wdev->auth_bsses[i] &&
 404                     memcmp(bssid, wdev->auth_bsses[i]->pub.bssid,
 405                                                 ETH_ALEN) == 0)
 406                         return -EALREADY;
 407         }
 408
 409         memset(&req, 0, sizeof(req));
 410
 411         req.local_state_change = local_state_change;
 412         req.ie = ie;
 413         req.ie_len = ie_len;
 414         req.auth_type = auth_type;
 415         req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
 416                                    WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 417         req.key = key;
 418         req.key_len = key_len;
 419         req.key_idx = key_idx;
 420         if (!req.bss)
 421                 return -ENOENT;
 422
 423         bss = bss_from_pub(req.bss);
 424
 425         for (i = 0; i < MAX_AUTH_BSSES; i++) {
 426                 if (!wdev->auth_bsses[i] && !wdev->authtry_bsses[i]) {
 427                         slot = i;
 428                         nfree++;
 429                 }
 430         }
 431
 432         /* we need one free slot for disassoc and one for this auth */
 433         if (nfree < 2) {
 434                 err = -ENOSPC;
 435                 goto out;
 436         }
 437
 438         if (local_state_change)
 439                 wdev->auth_bsses[slot] = bss;
 440         else
 441                 wdev->authtry_bsses[slot] = bss;
 442         cfg80211_hold_bss(bss);
 443
 444         err = rdev->ops->auth(&rdev->wiphy, dev, &req);
 445         if (err) {
 446                 if (local_state_change)
 447                         wdev->auth_bsses[slot] = NULL;
 448                 else
 449                         wdev->authtry_bsses[slot] = NULL;
 450                 cfg80211_unhold_bss(bss);
 451         }
 452
 453  out:
 454         if (err)
 455                 cfg80211_put_bss(req.bss);
 456         return err;
 457 }
 458
 459 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 460                        struct net_device *dev, struct ieee80211_channel *chan,
 461                        enum nl80211_auth_type auth_type, const u8 *bssid,
 462                        const u8 *ssid, int ssid_len,
 463                        const u8 *ie, int ie_len,
 464                        const u8 *key, int key_len, int key_idx,
 465                        bool local_state_change)
 466 {
 467         int err;
 468
 469         wdev_lock(dev->ieee80211_ptr);
 470         err = __cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
 471                                    ssid, ssid_len, ie, ie_len,
 472                                    key, key_len, key_idx, local_state_change);
 473         wdev_unlock(dev->ieee80211_ptr);
 474
 475         return err;
 476 }
 477
 478 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 479                           struct net_device *dev,
 480                           struct ieee80211_channel *chan,
 481                           const u8 *bssid, const u8 *prev_bssid,
 482                           const u8 *ssid, int ssid_len,
 483                           const u8 *ie, int ie_len, bool use_mfp,
 484                           struct cfg80211_crypto_settings *crypt)
 485 {
 486         struct wireless_dev *wdev = dev->ieee80211_ptr;
 487         struct cfg80211_assoc_request req;
 488         struct cfg80211_internal_bss *bss;
 489         int i, err, slot = -1;
 490         bool was_connected = false;
 491
 492         ASSERT_WDEV_LOCK(wdev);
 493
 494         memset(&req, 0, sizeof(req));
 495
 496         if (wdev->current_bss && prev_bssid &&
 497             memcmp(wdev->current_bss->pub.bssid, prev_bssid, ETH_ALEN) == 0) {
 498                 /*
 499                  * Trying to reassociate: Allow this to proceed and let the old
 500                  * association to be dropped when the new one is completed.
 501                  */
 502                 if (wdev->sme_state == CFG80211_SME_CONNECTED) {
 503                         was_connected = true;
 504                         wdev->sme_state = CFG80211_SME_CONNECTING;
 505                 }
 506         } else if (wdev->current_bss)
 507                 return -EALREADY;
 508
 509         req.ie = ie;
 510         req.ie_len = ie_len;
 511         memcpy(&req.crypto, crypt, sizeof(req.crypto));
 512         req.use_mfp = use_mfp;
 513         req.prev_bssid = prev_bssid;
 514         req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
 515                                    WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 516         if (!req.bss) {
 517                 if (was_connected)
 518                         wdev->sme_state = CFG80211_SME_CONNECTED;
 519                 return -ENOENT;
 520         }
 521
 522         bss = bss_from_pub(req.bss);
 523
 524         for (i = 0; i < MAX_AUTH_BSSES; i++) {
 525                 if (bss == wdev->auth_bsses[i]) {
 526                         slot = i;
 527                         break;
 528                 }
 529         }
 530
 531         if (slot < 0) {
 532                 err = -ENOTCONN;
 533                 goto out;
 534         }
 535
 536         err = rdev->ops->assoc(&rdev->wiphy, dev, &req);
 537  out:
 538         if (err && was_connected)
 539                 wdev->sme_state = CFG80211_SME_CONNECTED;
 540         /* still a reference in wdev->auth_bsses[slot] */
 541         cfg80211_put_bss(req.bss);
 542         return err;
 543 }
 544
 545 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 546                         struct net_device *dev,
 547                         struct ieee80211_channel *chan,
 548                         const u8 *bssid, const u8 *prev_bssid,
 549                         const u8 *ssid, int ssid_len,
 550                         const u8 *ie, int ie_len, bool use_mfp,
 551                         struct cfg80211_crypto_settings *crypt)
 552 {
 553         struct wireless_dev *wdev = dev->ieee80211_ptr;
 554         int err;
 555
 556         wdev_lock(wdev);
 557         err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
 558                                     ssid, ssid_len, ie, ie_len, use_mfp, crypt);
 559         wdev_unlock(wdev);
 560
 561         return err;
 562 }
 563
 564 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 565                            struct net_device *dev, const u8 *bssid,
 566                            const u8 *ie, int ie_len, u16 reason,
 567                            bool local_state_change)
 568 {
 569         struct wireless_dev *wdev = dev->ieee80211_ptr;
 570         struct cfg80211_deauth_request req;
 571         int i;
 572
 573         ASSERT_WDEV_LOCK(wdev);
 574
 575         memset(&req, 0, sizeof(req));
 576         req.reason_code = reason;
 577         req.local_state_change = local_state_change;
 578         req.ie = ie;
 579         req.ie_len = ie_len;
 580         if (wdev->current_bss &&
 581             memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) {
 582                 req.bss = &wdev->current_bss->pub;
 583         } else for (i = 0; i < MAX_AUTH_BSSES; i++) {
 584                 if (wdev->auth_bsses[i] &&
 585                     memcmp(bssid, wdev->auth_bsses[i]->pub.bssid, ETH_ALEN) == 0) {
 586                         req.bss = &wdev->auth_bsses[i]->pub;
 587                         break;
 588                 }
 589                 if (wdev->authtry_bsses[i] &&
 590                     memcmp(bssid, wdev->authtry_bsses[i]->pub.bssid, ETH_ALEN) == 0) {
 591                         req.bss = &wdev->authtry_bsses[i]->pub;
 592                         break;
 593                 }
 594         }
 595
 596         if (!req.bss)
 597                 return -ENOTCONN;
 598
 599         return rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
 600 }
 601
 602 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 603                          struct net_device *dev, const u8 *bssid,
 604                          const u8 *ie, int ie_len, u16 reason,
 605                          bool local_state_change)
 606 {
 607         struct wireless_dev *wdev = dev->ieee80211_ptr;
 608         int err;
 609
 610         wdev_lock(wdev);
 611         err = __cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason,
 612                                      local_state_change);
 613         wdev_unlock(wdev);
 614
 615         return err;
 616 }
 617
 618 static int __cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 619                                     struct net_device *dev, const u8 *bssid,
 620                                     const u8 *ie, int ie_len, u16 reason,
 621                                     bool local_state_change)
 622 {
 623         struct wireless_dev *wdev = dev->ieee80211_ptr;
 624         struct cfg80211_disassoc_request req;
 625
 626         ASSERT_WDEV_LOCK(wdev);
 627
 628         if (wdev->sme_state != CFG80211_SME_CONNECTED)
 629                 return -ENOTCONN;
 630
 631         if (WARN_ON(!wdev->current_bss))
 632                 return -ENOTCONN;
 633
 634         memset(&req, 0, sizeof(req));
 635         req.reason_code = reason;
 636         req.local_state_change = local_state_change;
 637         req.ie = ie;
 638         req.ie_len = ie_len;
 639         if (memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0)
 640                 req.bss = &wdev->current_bss->pub;
 641         else
 642                 return -ENOTCONN;
 643
 644         return rdev->ops->disassoc(&rdev->wiphy, dev, &req, wdev);
 645 }
 646
 647 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 648                            struct net_device *dev, const u8 *bssid,
 649                            const u8 *ie, int ie_len, u16 reason,
 650                            bool local_state_change)
 651 {
 652         struct wireless_dev *wdev = dev->ieee80211_ptr;
 653         int err;
 654
 655         wdev_lock(wdev);
 656         err = __cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason,
 657                                        local_state_change);
 658         wdev_unlock(wdev);
 659
 660         return err;
 661 }
 662
 663 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 664                         struct net_device *dev)
 665 {
 666         struct wireless_dev *wdev = dev->ieee80211_ptr;
 667         struct cfg80211_deauth_request req;
 668         int i;
 669
 670         ASSERT_WDEV_LOCK(wdev);
 671
 672         if (!rdev->ops->deauth)
 673                 return;
 674
 675         memset(&req, 0, sizeof(req));
 676         req.reason_code = WLAN_REASON_DEAUTH_LEAVING;
 677         req.ie = NULL;
 678         req.ie_len = 0;
 679
 680         if (wdev->current_bss) {
 681                 req.bss = &wdev->current_bss->pub;
 682                 rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
 683                 if (wdev->current_bss) {
 684                         cfg80211_unhold_bss(wdev->current_bss);
 685                         cfg80211_put_bss(&wdev->current_bss->pub);
 686                         wdev->current_bss = NULL;
 687                 }
 688         }
 689
 690         for (i = 0; i < MAX_AUTH_BSSES; i++) {
 691                 if (wdev->auth_bsses[i]) {
 692                         req.bss = &wdev->auth_bsses[i]->pub;
 693                         rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
 694                         if (wdev->auth_bsses[i]) {
 695                                 cfg80211_unhold_bss(wdev->auth_bsses[i]);
 696                                 cfg80211_put_bss(&wdev->auth_bsses[i]->pub);
 697                                 wdev->auth_bsses[i] = NULL;
 698                         }
 699                 }
 700                 if (wdev->authtry_bsses[i]) {
 701                         req.bss = &wdev->authtry_bsses[i]->pub;
 702                         rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
 703                         if (wdev->authtry_bsses[i]) {
 704                                 cfg80211_unhold_bss(wdev->authtry_bsses[i]);
 705                                 cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
 706                                 wdev->authtry_bsses[i] = NULL;
 707                         }
 708                 }
 709         }
 710 }
 711
 712 void cfg80211_ready_on_channel(struct net_device *dev, u64 cookie,
 713                                struct ieee80211_channel *chan,
 714                                enum nl80211_channel_type channel_type,
 715                                unsigned int duration, gfp_t gfp)
 716 {
 717         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 718         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 719
 720         nl80211_send_remain_on_channel(rdev, dev, cookie, chan, channel_type,
 721                                        duration, gfp);
 722 }
 723 EXPORT_SYMBOL(cfg80211_ready_on_channel);
 724
 725 void cfg80211_remain_on_channel_expired(struct net_device *dev,
 726                                         u64 cookie,
 727                                         struct ieee80211_channel *chan,
 728                                         enum nl80211_channel_type channel_type,
 729                                         gfp_t gfp)
 730 {
 731         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 732         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 733
 734         nl80211_send_remain_on_channel_cancel(rdev, dev, cookie, chan,
 735                                               channel_type, gfp);
 736 }
 737 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
 738
 739 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
 740                       struct station_info *sinfo, gfp_t gfp)
 741 {
 742         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 743         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 744
 745         nl80211_send_sta_event(rdev, dev, mac_addr, sinfo, gfp);
 746 }
 747 EXPORT_SYMBOL(cfg80211_new_sta);
 748
 749 struct cfg80211_action_registration {
 750         struct list_head list;
 751
 752         u32 nlpid;
 753
 754         int match_len;
 755
 756         u8 match[];
 757 };
 758
 759 int cfg80211_mlme_register_action(struct wireless_dev *wdev, u32 snd_pid,
 760                                   const u8 *match_data, int match_len)
 761 {
 762         struct cfg80211_action_registration *reg, *nreg;
 763         int err = 0;
 764
 765         nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
 766         if (!nreg)
 767                 return -ENOMEM;
 768
 769         spin_lock_bh(&wdev->action_registrations_lock);
 770
 771         list_for_each_entry(reg, &wdev->action_registrations, list) {
 772                 int mlen = min(match_len, reg->match_len);
 773
 774                 if (memcmp(reg->match, match_data, mlen) == 0) {
 775                         err = -EALREADY;
 776                         break;
 777                 }
 778         }
 779
 780         if (err) {
 781                 kfree(nreg);
 782                 goto out;
 783         }
 784
 785         memcpy(nreg->match, match_data, match_len);
 786         nreg->match_len = match_len;
 787         nreg->nlpid = snd_pid;
 788         list_add(&nreg->list, &wdev->action_registrations);
 789
 790  out:
 791         spin_unlock_bh(&wdev->action_registrations_lock);
 792         return err;
 793 }
 794
 795 void cfg80211_mlme_unregister_actions(struct wireless_dev *wdev, u32 nlpid)
 796 {
 797         struct cfg80211_action_registration *reg, *tmp;
 798
 799         spin_lock_bh(&wdev->action_registrations_lock);
 800
 801         list_for_each_entry_safe(reg, tmp, &wdev->action_registrations, list) {
 802                 if (reg->nlpid == nlpid) {
 803                         list_del(&reg->list);
 804                         kfree(reg);
 805                 }
 806         }
 807
 808         spin_unlock_bh(&wdev->action_registrations_lock);
 809 }
 810
 811 void cfg80211_mlme_purge_actions(struct wireless_dev *wdev)
 812 {
 813         struct cfg80211_action_registration *reg, *tmp;
 814
 815         spin_lock_bh(&wdev->action_registrations_lock);
 816
 817         list_for_each_entry_safe(reg, tmp, &wdev->action_registrations, list) {
 818                 list_del(&reg->list);
 819                 kfree(reg);
 820         }
 821
 822         spin_unlock_bh(&wdev->action_registrations_lock);
 823 }
 824
 825 int cfg80211_mlme_action(struct cfg80211_registered_device *rdev,
 826                          struct net_device *dev,
 827                          struct ieee80211_channel *chan,
 828                          enum nl80211_channel_type channel_type,
 829                          const u8 *buf, size_t len, u64 *cookie)
 830 {
 831         struct wireless_dev *wdev = dev->ieee80211_ptr;
 832         const struct ieee80211_mgmt *mgmt;
 833
 834         if (rdev->ops->action == NULL)
 835                 return -EOPNOTSUPP;
 836         if (len < 24 + 1)
 837                 return -EINVAL;
 838
 839         mgmt = (const struct ieee80211_mgmt *) buf;
 840         if (!ieee80211_is_action(mgmt->frame_control))
 841                 return -EINVAL;
 842         if (mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
 843                 /* Verify that we are associated with the destination AP */
 844                 if (!wdev->current_bss ||
 845                     memcmp(wdev->current_bss->pub.bssid, mgmt->bssid,
 846                            ETH_ALEN) != 0 ||
 847                     memcmp(wdev->current_bss->pub.bssid, mgmt->da,
 848                            ETH_ALEN) != 0)
 849                         return -ENOTCONN;
 850         }
 851
 852         if (memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0)
 853                 return -EINVAL;
 854
 855         /* Transmit the Action frame as requested by user space */
 856         return rdev->ops->action(&rdev->wiphy, dev, chan, channel_type,
 857                                  buf, len, cookie);
 858 }
 859
 860 bool cfg80211_rx_action(struct net_device *dev, int freq, const u8 *buf,
 861                         size_t len, gfp_t gfp)
 862 {
 863         struct wireless_dev *wdev = dev->ieee80211_ptr;
 864         struct wiphy *wiphy = wdev->wiphy;
 865         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 866         struct cfg80211_action_registration *reg;
 867         const u8 *action_data;
 868         int action_data_len;
 869         bool result = false;
 870
 871         /* frame length - min size excluding category */
 872         action_data_len = len - (IEEE80211_MIN_ACTION_SIZE - 1);
 873
 874         /* action data starts with category */
 875         action_data = buf + IEEE80211_MIN_ACTION_SIZE - 1;
 876
 877         spin_lock_bh(&wdev->action_registrations_lock);
 878
 879         list_for_each_entry(reg, &wdev->action_registrations, list) {
 880                 if (reg->match_len > action_data_len)
 881                         continue;
 882
 883                 if (memcmp(reg->match, action_data, reg->match_len))
 884                         continue;
 885
 886                 /* found match! */
 887
 888                 /* Indicate the received Action frame to user space */
 889                 if (nl80211_send_action(rdev, dev, reg->nlpid, freq,
 890                                         buf, len, gfp))
 891                         continue;
 892
 893                 result = true;
 894                 break;
 895         }
 896
 897         spin_unlock_bh(&wdev->action_registrations_lock);
 898
 899         return result;
 900 }
 901 EXPORT_SYMBOL(cfg80211_rx_action);
 902
 903 void cfg80211_action_tx_status(struct net_device *dev, u64 cookie,
 904                                const u8 *buf, size_t len, bool ack, gfp_t gfp)
 905 {
 906         struct wireless_dev *wdev = dev->ieee80211_ptr;
 907         struct wiphy *wiphy = wdev->wiphy;
 908         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 909
 910         /* Indicate TX status of the Action frame to user space */
 911         nl80211_send_action_tx_status(rdev, dev, cookie, buf, len, ack, gfp);
 912 }
 913 EXPORT_SYMBOL(cfg80211_action_tx_status);
 914
 915 void cfg80211_cqm_rssi_notify(struct net_device *dev,
 916                               enum nl80211_cqm_rssi_threshold_event rssi_event,
 917                               gfp_t gfp)
 918 {
 919         struct wireless_dev *wdev = dev->ieee80211_ptr;
 920         struct wiphy *wiphy = wdev->wiphy;
 921         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 922
 923         /* Indicate roaming trigger event to user space */
 924         nl80211_send_cqm_rssi_notify(rdev, dev, rssi_event, gfp);
 925 }
 926 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);