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/etherdevice.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/nl80211.h>
  12 #include <linux/slab.h>
  13 #include <linux/wireless.h>
  14 #include <net/cfg80211.h>
  15 #include <net/iw_handler.h>
  16 #include "core.h"
  17 #include "nl80211.h"
  18
  19 void cfg80211_send_rx_auth(struct net_device *dev, const u8 *buf, size_t len)
  20 {
  21         struct wireless_dev *wdev = dev->ieee80211_ptr;
  22         struct wiphy *wiphy = wdev->wiphy;
  23         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
  24
  25         wdev_lock(wdev);
  26
  27         nl80211_send_rx_auth(rdev, dev, buf, len, GFP_KERNEL);
  28         cfg80211_sme_rx_auth(dev, buf, len);
  29
  30         wdev_unlock(wdev);
  31 }
  32 EXPORT_SYMBOL(cfg80211_send_rx_auth);
  33
  34 void cfg80211_send_rx_assoc(struct net_device *dev, struct cfg80211_bss *bss,
  35                             const u8 *buf, size_t len)
  36 {
  37         u16 status_code;
  38         struct wireless_dev *wdev = dev->ieee80211_ptr;
  39         struct wiphy *wiphy = wdev->wiphy;
  40         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
  41         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
  42         u8 *ie = mgmt->u.assoc_resp.variable;
  43         int ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
  44
  45         wdev_lock(wdev);
  46
  47         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
  48
  49         /*
  50          * This is a bit of a hack, we don't notify userspace of
  51          * a (re-)association reply if we tried to send a reassoc
  52          * and got a reject -- we only try again with an assoc
  53          * frame instead of reassoc.
  54          */
  55         if (status_code != WLAN_STATUS_SUCCESS && wdev->conn &&
  56             cfg80211_sme_failed_reassoc(wdev)) {
  57                 cfg80211_put_bss(bss);
  58                 goto out;
  59         }
  60
  61         nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL);
  62
  63         if (status_code != WLAN_STATUS_SUCCESS && wdev->conn) {
  64                 cfg80211_sme_failed_assoc(wdev);
  65                 /*
  66                  * do not call connect_result() now because the
  67                  * sme will schedule work that does it later.
  68                  */
  69                 cfg80211_put_bss(bss);
  70                 goto out;
  71         }
  72
  73         if (!wdev->conn && wdev->sme_state == CFG80211_SME_IDLE) {
  74                 /*
  75                  * This is for the userspace SME, the CONNECTING
  76                  * state will be changed to CONNECTED by
  77                  * __cfg80211_connect_result() below.
  78                  */
  79                 wdev->sme_state = CFG80211_SME_CONNECTING;
  80         }
  81
  82         /* this consumes the bss reference */
  83         __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
  84                                   status_code,
  85                                   status_code == WLAN_STATUS_SUCCESS, bss);
  86  out:
  87         wdev_unlock(wdev);
  88 }
  89 EXPORT_SYMBOL(cfg80211_send_rx_assoc);
  90
  91 void __cfg80211_send_deauth(struct net_device *dev,
  92                                    const u8 *buf, size_t len)
  93 {
  94         struct wireless_dev *wdev = dev->ieee80211_ptr;
  95         struct wiphy *wiphy = wdev->wiphy;
  96         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
  97         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
  98         const u8 *bssid = mgmt->bssid;
  99         bool was_current = false;
 100
 101         ASSERT_WDEV_LOCK(wdev);
 102
 103         if (wdev->current_bss &&
 104             ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) {
 105                 cfg80211_unhold_bss(wdev->current_bss);
 106                 cfg80211_put_bss(&wdev->current_bss->pub);
 107                 wdev->current_bss = NULL;
 108                 was_current = true;
 109         }
 110
 111         nl80211_send_deauth(rdev, dev, buf, len, GFP_KERNEL);
 112
 113         if (wdev->sme_state == CFG80211_SME_CONNECTED && was_current) {
 114                 u16 reason_code;
 115                 bool from_ap;
 116
 117                 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
 118
 119                 from_ap = !ether_addr_equal(mgmt->sa, dev->dev_addr);
 120                 __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
 121         } else if (wdev->sme_state == CFG80211_SME_CONNECTING) {
 122                 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
 123                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 124                                           false, NULL);
 125         }
 126 }
 127 EXPORT_SYMBOL(__cfg80211_send_deauth);
 128
 129 void cfg80211_send_deauth(struct net_device *dev, const u8 *buf, size_t len)
 130 {
 131         struct wireless_dev *wdev = dev->ieee80211_ptr;
 132
 133         wdev_lock(wdev);
 134         __cfg80211_send_deauth(dev, buf, len);
 135         wdev_unlock(wdev);
 136 }
 137 EXPORT_SYMBOL(cfg80211_send_deauth);
 138
 139 void __cfg80211_send_disassoc(struct net_device *dev,
 140                                      const u8 *buf, size_t len)
 141 {
 142         struct wireless_dev *wdev = dev->ieee80211_ptr;
 143         struct wiphy *wiphy = wdev->wiphy;
 144         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 145         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 146         const u8 *bssid = mgmt->bssid;
 147         u16 reason_code;
 148         bool from_ap;
 149
 150         ASSERT_WDEV_LOCK(wdev);
 151
 152         nl80211_send_disassoc(rdev, dev, buf, len, GFP_KERNEL);
 153
 154         if (wdev->sme_state != CFG80211_SME_CONNECTED)
 155                 return;
 156
 157         if (wdev->current_bss &&
 158             ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) {
 159                 cfg80211_sme_disassoc(dev, wdev->current_bss);
 160                 cfg80211_unhold_bss(wdev->current_bss);
 161                 cfg80211_put_bss(&wdev->current_bss->pub);
 162                 wdev->current_bss = NULL;
 163         } else
 164                 WARN_ON(1);
 165
 166
 167         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
 168
 169         from_ap = !ether_addr_equal(mgmt->sa, dev->dev_addr);
 170         __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
 171 }
 172 EXPORT_SYMBOL(__cfg80211_send_disassoc);
 173
 174 void cfg80211_send_disassoc(struct net_device *dev, const u8 *buf, size_t len)
 175 {
 176         struct wireless_dev *wdev = dev->ieee80211_ptr;
 177
 178         wdev_lock(wdev);
 179         __cfg80211_send_disassoc(dev, buf, len);
 180         wdev_unlock(wdev);
 181 }
 182 EXPORT_SYMBOL(cfg80211_send_disassoc);
 183
 184 void cfg80211_send_unprot_deauth(struct net_device *dev, const u8 *buf,
 185                                  size_t len)
 186 {
 187         struct wireless_dev *wdev = dev->ieee80211_ptr;
 188         struct wiphy *wiphy = wdev->wiphy;
 189         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 190
 191         nl80211_send_unprot_deauth(rdev, dev, buf, len, GFP_ATOMIC);
 192 }
 193 EXPORT_SYMBOL(cfg80211_send_unprot_deauth);
 194
 195 void cfg80211_send_unprot_disassoc(struct net_device *dev, const u8 *buf,
 196                                    size_t len)
 197 {
 198         struct wireless_dev *wdev = dev->ieee80211_ptr;
 199         struct wiphy *wiphy = wdev->wiphy;
 200         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 201
 202         nl80211_send_unprot_disassoc(rdev, dev, buf, len, GFP_ATOMIC);
 203 }
 204 EXPORT_SYMBOL(cfg80211_send_unprot_disassoc);
 205
 206 void cfg80211_send_auth_timeout(struct net_device *dev, const u8 *addr)
 207 {
 208         struct wireless_dev *wdev = dev->ieee80211_ptr;
 209         struct wiphy *wiphy = wdev->wiphy;
 210         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 211
 212         wdev_lock(wdev);
 213
 214         nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
 215         if (wdev->sme_state == CFG80211_SME_CONNECTING)
 216                 __cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
 217                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 218                                           false, NULL);
 219
 220         wdev_unlock(wdev);
 221 }
 222 EXPORT_SYMBOL(cfg80211_send_auth_timeout);
 223
 224 void cfg80211_send_assoc_timeout(struct net_device *dev, const u8 *addr)
 225 {
 226         struct wireless_dev *wdev = dev->ieee80211_ptr;
 227         struct wiphy *wiphy = wdev->wiphy;
 228         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 229
 230         wdev_lock(wdev);
 231
 232         nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL);
 233         if (wdev->sme_state == CFG80211_SME_CONNECTING)
 234                 __cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
 235                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 236                                           false, NULL);
 237
 238         wdev_unlock(wdev);
 239 }
 240 EXPORT_SYMBOL(cfg80211_send_assoc_timeout);
 241
 242 void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
 243                                   enum nl80211_key_type key_type, int key_id,
 244                                   const u8 *tsc, gfp_t gfp)
 245 {
 246         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 247         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 248 #ifdef CONFIG_CFG80211_WEXT
 249         union iwreq_data wrqu;
 250         char *buf = kmalloc(128, gfp);
 251
 252         if (buf) {
 253                 sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
 254                         "keyid=%d %scast addr=%pM)", key_id,
 255                         key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni",
 256                         addr);
 257                 memset(&wrqu, 0, sizeof(wrqu));
 258                 wrqu.data.length = strlen(buf);
 259                 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 260                 kfree(buf);
 261         }
 262 #endif
 263
 264         nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
 265 }
 266 EXPORT_SYMBOL(cfg80211_michael_mic_failure);
 267
 268 /* some MLME handling for userspace SME */
 269 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 270                          struct net_device *dev,
 271                          struct ieee80211_channel *chan,
 272                          enum nl80211_auth_type auth_type,
 273                          const u8 *bssid,
 274                          const u8 *ssid, int ssid_len,
 275                          const u8 *ie, int ie_len,
 276                          const u8 *key, int key_len, int key_idx)
 277 {
 278         struct wireless_dev *wdev = dev->ieee80211_ptr;
 279         struct cfg80211_auth_request req;
 280         int err;
 281
 282         ASSERT_WDEV_LOCK(wdev);
 283
 284         if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
 285                 if (!key || !key_len || key_idx < 0 || key_idx > 4)
 286                         return -EINVAL;
 287
 288         if (wdev->current_bss &&
 289             ether_addr_equal(bssid, wdev->current_bss->pub.bssid))
 290                 return -EALREADY;
 291
 292         memset(&req, 0, sizeof(req));
 293
 294         req.ie = ie;
 295         req.ie_len = ie_len;
 296         req.auth_type = auth_type;
 297         req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
 298                                    WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 299         req.key = key;
 300         req.key_len = key_len;
 301         req.key_idx = key_idx;
 302         if (!req.bss)
 303                 return -ENOENT;
 304
 305         err = cfg80211_can_use_chan(rdev, wdev, req.bss->channel,
 306                                     CHAN_MODE_SHARED);
 307         if (err)
 308                 goto out;
 309
 310         err = rdev->ops->auth(&rdev->wiphy, dev, &req);
 311
 312 out:
 313         cfg80211_put_bss(req.bss);
 314         return err;
 315 }
 316
 317 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 318                        struct net_device *dev, struct ieee80211_channel *chan,
 319                        enum nl80211_auth_type auth_type, const u8 *bssid,
 320                        const u8 *ssid, int ssid_len,
 321                        const u8 *ie, int ie_len,
 322                        const u8 *key, int key_len, int key_idx)
 323 {
 324         int err;
 325
 326         mutex_lock(&rdev->devlist_mtx);
 327         wdev_lock(dev->ieee80211_ptr);
 328         err = __cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
 329                                    ssid, ssid_len, ie, ie_len,
 330                                    key, key_len, key_idx);
 331         wdev_unlock(dev->ieee80211_ptr);
 332         mutex_unlock(&rdev->devlist_mtx);
 333
 334         return err;
 335 }
 336
 337 /*  Do a logical ht_capa &= ht_capa_mask.  */
 338 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
 339                                const struct ieee80211_ht_cap *ht_capa_mask)
 340 {
 341         int i;
 342         u8 *p1, *p2;
 343         if (!ht_capa_mask) {
 344                 memset(ht_capa, 0, sizeof(*ht_capa));
 345                 return;
 346         }
 347
 348         p1 = (u8*)(ht_capa);
 349         p2 = (u8*)(ht_capa_mask);
 350         for (i = 0; i<sizeof(*ht_capa); i++)
 351                 p1[i] &= p2[i];
 352 }
 353
 354 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 355                           struct net_device *dev,
 356                           struct ieee80211_channel *chan,
 357                           const u8 *bssid, const u8 *prev_bssid,
 358                           const u8 *ssid, int ssid_len,
 359                           const u8 *ie, int ie_len, bool use_mfp,
 360                           struct cfg80211_crypto_settings *crypt,
 361                           u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
 362                           struct ieee80211_ht_cap *ht_capa_mask)
 363 {
 364         struct wireless_dev *wdev = dev->ieee80211_ptr;
 365         struct cfg80211_assoc_request req;
 366         int err;
 367         bool was_connected = false;
 368
 369         ASSERT_WDEV_LOCK(wdev);
 370
 371         memset(&req, 0, sizeof(req));
 372
 373         if (wdev->current_bss && prev_bssid &&
 374             ether_addr_equal(wdev->current_bss->pub.bssid, prev_bssid)) {
 375                 /*
 376                  * Trying to reassociate: Allow this to proceed and let the old
 377                  * association to be dropped when the new one is completed.
 378                  */
 379                 if (wdev->sme_state == CFG80211_SME_CONNECTED) {
 380                         was_connected = true;
 381                         wdev->sme_state = CFG80211_SME_CONNECTING;
 382                 }
 383         } else if (wdev->current_bss)
 384                 return -EALREADY;
 385
 386         req.ie = ie;
 387         req.ie_len = ie_len;
 388         memcpy(&req.crypto, crypt, sizeof(req.crypto));
 389         req.use_mfp = use_mfp;
 390         req.prev_bssid = prev_bssid;
 391         req.flags = assoc_flags;
 392         if (ht_capa)
 393                 memcpy(&req.ht_capa, ht_capa, sizeof(req.ht_capa));
 394         if (ht_capa_mask)
 395                 memcpy(&req.ht_capa_mask, ht_capa_mask,
 396                        sizeof(req.ht_capa_mask));
 397         cfg80211_oper_and_ht_capa(&req.ht_capa_mask,
 398                                   rdev->wiphy.ht_capa_mod_mask);
 399
 400         req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
 401                                    WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 402         if (!req.bss) {
 403                 if (was_connected)
 404                         wdev->sme_state = CFG80211_SME_CONNECTED;
 405                 return -ENOENT;
 406         }
 407
 408         err = cfg80211_can_use_chan(rdev, wdev, req.bss->channel,
 409                                     CHAN_MODE_SHARED);
 410         if (err)
 411                 goto out;
 412
 413         err = rdev->ops->assoc(&rdev->wiphy, dev, &req);
 414
 415 out:
 416         if (err) {
 417                 if (was_connected)
 418                         wdev->sme_state = CFG80211_SME_CONNECTED;
 419                 cfg80211_put_bss(req.bss);
 420         }
 421
 422         return err;
 423 }
 424
 425 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 426                         struct net_device *dev,
 427                         struct ieee80211_channel *chan,
 428                         const u8 *bssid, const u8 *prev_bssid,
 429                         const u8 *ssid, int ssid_len,
 430                         const u8 *ie, int ie_len, bool use_mfp,
 431                         struct cfg80211_crypto_settings *crypt,
 432                         u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
 433                         struct ieee80211_ht_cap *ht_capa_mask)
 434 {
 435         struct wireless_dev *wdev = dev->ieee80211_ptr;
 436         int err;
 437
 438         mutex_lock(&rdev->devlist_mtx);
 439         wdev_lock(wdev);
 440         err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
 441                                     ssid, ssid_len, ie, ie_len, use_mfp, crypt,
 442                                     assoc_flags, ht_capa, ht_capa_mask);
 443         wdev_unlock(wdev);
 444         mutex_unlock(&rdev->devlist_mtx);
 445
 446         return err;
 447 }
 448
 449 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 450                            struct net_device *dev, const u8 *bssid,
 451                            const u8 *ie, int ie_len, u16 reason,
 452                            bool local_state_change)
 453 {
 454         struct wireless_dev *wdev = dev->ieee80211_ptr;
 455         struct cfg80211_deauth_request req = {
 456                 .bssid = bssid,
 457                 .reason_code = reason,
 458                 .ie = ie,
 459                 .ie_len = ie_len,
 460                 .local_state_change = local_state_change,
 461         };
 462
 463         ASSERT_WDEV_LOCK(wdev);
 464
 465         if (local_state_change && (!wdev->current_bss ||
 466             !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
 467                 return 0;
 468
 469         return rdev->ops->deauth(&rdev->wiphy, dev, &req);
 470 }
 471
 472 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 473                          struct net_device *dev, const u8 *bssid,
 474                          const u8 *ie, int ie_len, u16 reason,
 475                          bool local_state_change)
 476 {
 477         struct wireless_dev *wdev = dev->ieee80211_ptr;
 478         int err;
 479
 480         wdev_lock(wdev);
 481         err = __cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason,
 482                                      local_state_change);
 483         wdev_unlock(wdev);
 484
 485         return err;
 486 }
 487
 488 static int __cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 489                                     struct net_device *dev, const u8 *bssid,
 490                                     const u8 *ie, int ie_len, u16 reason,
 491                                     bool local_state_change)
 492 {
 493         struct wireless_dev *wdev = dev->ieee80211_ptr;
 494         struct cfg80211_disassoc_request req;
 495
 496         ASSERT_WDEV_LOCK(wdev);
 497
 498         if (wdev->sme_state != CFG80211_SME_CONNECTED)
 499                 return -ENOTCONN;
 500
 501         if (WARN_ON(!wdev->current_bss))
 502                 return -ENOTCONN;
 503
 504         memset(&req, 0, sizeof(req));
 505         req.reason_code = reason;
 506         req.local_state_change = local_state_change;
 507         req.ie = ie;
 508         req.ie_len = ie_len;
 509         if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
 510                 req.bss = &wdev->current_bss->pub;
 511         else
 512                 return -ENOTCONN;
 513
 514         return rdev->ops->disassoc(&rdev->wiphy, dev, &req);
 515 }
 516
 517 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 518                            struct net_device *dev, const u8 *bssid,
 519                            const u8 *ie, int ie_len, u16 reason,
 520                            bool local_state_change)
 521 {
 522         struct wireless_dev *wdev = dev->ieee80211_ptr;
 523         int err;
 524
 525         wdev_lock(wdev);
 526         err = __cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason,
 527                                        local_state_change);
 528         wdev_unlock(wdev);
 529
 530         return err;
 531 }
 532
 533 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 534                         struct net_device *dev)
 535 {
 536         struct wireless_dev *wdev = dev->ieee80211_ptr;
 537         struct cfg80211_deauth_request req;
 538         u8 bssid[ETH_ALEN];
 539
 540         ASSERT_WDEV_LOCK(wdev);
 541
 542         if (!rdev->ops->deauth)
 543                 return;
 544
 545         memset(&req, 0, sizeof(req));
 546         req.reason_code = WLAN_REASON_DEAUTH_LEAVING;
 547         req.ie = NULL;
 548         req.ie_len = 0;
 549
 550         if (!wdev->current_bss)
 551                 return;
 552
 553         memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN);
 554         req.bssid = bssid;
 555         rdev->ops->deauth(&rdev->wiphy, dev, &req);
 556
 557         if (wdev->current_bss) {
 558                 cfg80211_unhold_bss(wdev->current_bss);
 559                 cfg80211_put_bss(&wdev->current_bss->pub);
 560                 wdev->current_bss = NULL;
 561         }
 562 }
 563
 564 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
 565                                struct ieee80211_channel *chan,
 566                                enum nl80211_channel_type channel_type,
 567                                unsigned int duration, gfp_t gfp)
 568 {
 569         struct wiphy *wiphy = wdev->wiphy;
 570         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 571
 572         nl80211_send_remain_on_channel(rdev, wdev, cookie, chan, channel_type,
 573                                        duration, gfp);
 574 }
 575 EXPORT_SYMBOL(cfg80211_ready_on_channel);
 576
 577 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
 578                                         struct ieee80211_channel *chan,
 579                                         enum nl80211_channel_type channel_type,
 580                                         gfp_t gfp)
 581 {
 582         struct wiphy *wiphy = wdev->wiphy;
 583         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 584
 585         nl80211_send_remain_on_channel_cancel(rdev, wdev, cookie, chan,
 586                                               channel_type, gfp);
 587 }
 588 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
 589
 590 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
 591                       struct station_info *sinfo, gfp_t gfp)
 592 {
 593         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 594         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 595
 596         nl80211_send_sta_event(rdev, dev, mac_addr, sinfo, gfp);
 597 }
 598 EXPORT_SYMBOL(cfg80211_new_sta);
 599
 600 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
 601 {
 602         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 603         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 604
 605         nl80211_send_sta_del_event(rdev, dev, mac_addr, gfp);
 606 }
 607 EXPORT_SYMBOL(cfg80211_del_sta);
 608
 609 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
 610                           enum nl80211_connect_failed_reason reason,
 611                           gfp_t gfp)
 612 {
 613         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 614         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 615
 616         nl80211_send_conn_failed_event(rdev, dev, mac_addr, reason, gfp);
 617 }
 618 EXPORT_SYMBOL(cfg80211_conn_failed);
 619
 620 struct cfg80211_mgmt_registration {
 621         struct list_head list;
 622
 623         u32 nlportid;
 624
 625         int match_len;
 626
 627         __le16 frame_type;
 628
 629         u8 match[];
 630 };
 631
 632 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
 633                                 u16 frame_type, const u8 *match_data,
 634                                 int match_len)
 635 {
 636         struct wiphy *wiphy = wdev->wiphy;
 637         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 638         struct cfg80211_mgmt_registration *reg, *nreg;
 639         int err = 0;
 640         u16 mgmt_type;
 641
 642         if (!wdev->wiphy->mgmt_stypes)
 643                 return -EOPNOTSUPP;
 644
 645         if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT)
 646                 return -EINVAL;
 647
 648         if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE))
 649                 return -EINVAL;
 650
 651         mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4;
 652         if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type)))
 653                 return -EINVAL;
 654
 655         nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
 656         if (!nreg)
 657                 return -ENOMEM;
 658
 659         spin_lock_bh(&wdev->mgmt_registrations_lock);
 660
 661         list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
 662                 int mlen = min(match_len, reg->match_len);
 663
 664                 if (frame_type != le16_to_cpu(reg->frame_type))
 665                         continue;
 666
 667                 if (memcmp(reg->match, match_data, mlen) == 0) {
 668                         err = -EALREADY;
 669                         break;
 670                 }
 671         }
 672
 673         if (err) {
 674                 kfree(nreg);
 675                 goto out;
 676         }
 677
 678         memcpy(nreg->match, match_data, match_len);
 679         nreg->match_len = match_len;
 680         nreg->nlportid = snd_portid;
 681         nreg->frame_type = cpu_to_le16(frame_type);
 682         list_add(&nreg->list, &wdev->mgmt_registrations);
 683
 684         if (rdev->ops->mgmt_frame_register)
 685                 rdev->ops->mgmt_frame_register(wiphy, wdev, frame_type, true);
 686
 687  out:
 688         spin_unlock_bh(&wdev->mgmt_registrations_lock);
 689
 690         return err;
 691 }
 692
 693 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid)
 694 {
 695         struct wiphy *wiphy = wdev->wiphy;
 696         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 697         struct cfg80211_mgmt_registration *reg, *tmp;
 698
 699         spin_lock_bh(&wdev->mgmt_registrations_lock);
 700
 701         list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
 702                 if (reg->nlportid != nlportid)
 703                         continue;
 704
 705                 if (rdev->ops->mgmt_frame_register) {
 706                         u16 frame_type = le16_to_cpu(reg->frame_type);
 707
 708                         rdev->ops->mgmt_frame_register(wiphy, wdev,
 709                                                        frame_type, false);
 710                 }
 711
 712                 list_del(&reg->list);
 713                 kfree(reg);
 714         }
 715
 716         spin_unlock_bh(&wdev->mgmt_registrations_lock);
 717
 718         if (nlportid == wdev->ap_unexpected_nlportid)
 719                 wdev->ap_unexpected_nlportid = 0;
 720 }
 721
 722 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev)
 723 {
 724         struct cfg80211_mgmt_registration *reg, *tmp;
 725
 726         spin_lock_bh(&wdev->mgmt_registrations_lock);
 727
 728         list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
 729                 list_del(&reg->list);
 730                 kfree(reg);
 731         }
 732
 733         spin_unlock_bh(&wdev->mgmt_registrations_lock);
 734 }
 735
 736 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 737                           struct wireless_dev *wdev,
 738                           struct ieee80211_channel *chan, bool offchan,
 739                           enum nl80211_channel_type channel_type,
 740                           bool channel_type_valid, unsigned int wait,
 741                           const u8 *buf, size_t len, bool no_cck,
 742                           bool dont_wait_for_ack, u64 *cookie)
 743 {
 744         const struct ieee80211_mgmt *mgmt;
 745         u16 stype;
 746
 747         if (!wdev->wiphy->mgmt_stypes)
 748                 return -EOPNOTSUPP;
 749
 750         if (!rdev->ops->mgmt_tx)
 751                 return -EOPNOTSUPP;
 752
 753         if (len < 24 + 1)
 754                 return -EINVAL;
 755
 756         mgmt = (const struct ieee80211_mgmt *) buf;
 757
 758         if (!ieee80211_is_mgmt(mgmt->frame_control))
 759                 return -EINVAL;
 760
 761         stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
 762         if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4)))
 763                 return -EINVAL;
 764
 765         if (ieee80211_is_action(mgmt->frame_control) &&
 766             mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
 767                 int err = 0;
 768
 769                 wdev_lock(wdev);
 770
 771                 switch (wdev->iftype) {
 772                 case NL80211_IFTYPE_ADHOC:
 773                 case NL80211_IFTYPE_STATION:
 774                 case NL80211_IFTYPE_P2P_CLIENT:
 775                         if (!wdev->current_bss) {
 776                                 err = -ENOTCONN;
 777                                 break;
 778                         }
 779
 780                         if (!ether_addr_equal(wdev->current_bss->pub.bssid,
 781                                               mgmt->bssid)) {
 782                                 err = -ENOTCONN;
 783                                 break;
 784                         }
 785
 786                         /*
 787                          * check for IBSS DA must be done by driver as
 788                          * cfg80211 doesn't track the stations
 789                          */
 790                         if (wdev->iftype == NL80211_IFTYPE_ADHOC)
 791                                 break;
 792
 793                         /* for station, check that DA is the AP */
 794                         if (!ether_addr_equal(wdev->current_bss->pub.bssid,
 795                                               mgmt->da)) {
 796                                 err = -ENOTCONN;
 797                                 break;
 798                         }
 799                         break;
 800                 case NL80211_IFTYPE_AP:
 801                 case NL80211_IFTYPE_P2P_GO:
 802                 case NL80211_IFTYPE_AP_VLAN:
 803                         if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)))
 804                                 err = -EINVAL;
 805                         break;
 806                 case NL80211_IFTYPE_MESH_POINT:
 807                         if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) {
 808                                 err = -EINVAL;
 809                                 break;
 810                         }
 811                         /*
 812                          * check for mesh DA must be done by driver as
 813                          * cfg80211 doesn't track the stations
 814                          */
 815                         break;
 816                 case NL80211_IFTYPE_P2P_DEVICE:
 817                         /*
 818                          * fall through, P2P device only supports
 819                          * public action frames
 820                          */
 821                 default:
 822                         err = -EOPNOTSUPP;
 823                         break;
 824                 }
 825                 wdev_unlock(wdev);
 826
 827                 if (err)
 828                         return err;
 829         }
 830
 831         if (!ether_addr_equal(mgmt->sa, wdev_address(wdev)))
 832                 return -EINVAL;
 833
 834         /* Transmit the Action frame as requested by user space */
 835         return rdev->ops->mgmt_tx(&rdev->wiphy, wdev, chan, offchan,
 836                                   channel_type, channel_type_valid,
 837                                   wait, buf, len, no_cck, dont_wait_for_ack,
 838                                   cookie);
 839 }
 840
 841 bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm,
 842                       const u8 *buf, size_t len, gfp_t gfp)
 843 {
 844         struct wiphy *wiphy = wdev->wiphy;
 845         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 846         struct cfg80211_mgmt_registration *reg;
 847         const struct ieee80211_txrx_stypes *stypes =
 848                 &wiphy->mgmt_stypes[wdev->iftype];
 849         struct ieee80211_mgmt *mgmt = (void *)buf;
 850         const u8 *data;
 851         int data_len;
 852         bool result = false;
 853         __le16 ftype = mgmt->frame_control &
 854                 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE);
 855         u16 stype;
 856
 857         stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
 858
 859         if (!(stypes->rx & BIT(stype)))
 860                 return false;
 861
 862         data = buf + ieee80211_hdrlen(mgmt->frame_control);
 863         data_len = len - ieee80211_hdrlen(mgmt->frame_control);
 864
 865         spin_lock_bh(&wdev->mgmt_registrations_lock);
 866
 867         list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
 868                 if (reg->frame_type != ftype)
 869                         continue;
 870
 871                 if (reg->match_len > data_len)
 872                         continue;
 873
 874                 if (memcmp(reg->match, data, reg->match_len))
 875                         continue;
 876
 877                 /* found match! */
 878
 879                 /* Indicate the received Action frame to user space */
 880                 if (nl80211_send_mgmt(rdev, wdev, reg->nlportid,
 881                                       freq, sig_mbm,
 882                                       buf, len, gfp))
 883                         continue;
 884
 885                 result = true;
 886                 break;
 887         }
 888
 889         spin_unlock_bh(&wdev->mgmt_registrations_lock);
 890
 891         return result;
 892 }
 893 EXPORT_SYMBOL(cfg80211_rx_mgmt);
 894
 895 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
 896                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
 897 {
 898         struct wiphy *wiphy = wdev->wiphy;
 899         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 900
 901         /* Indicate TX status of the Action frame to user space */
 902         nl80211_send_mgmt_tx_status(rdev, wdev, cookie, buf, len, ack, gfp);
 903 }
 904 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
 905
 906 void cfg80211_cqm_rssi_notify(struct net_device *dev,
 907                               enum nl80211_cqm_rssi_threshold_event rssi_event,
 908                               gfp_t gfp)
 909 {
 910         struct wireless_dev *wdev = dev->ieee80211_ptr;
 911         struct wiphy *wiphy = wdev->wiphy;
 912         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 913
 914         /* Indicate roaming trigger event to user space */
 915         nl80211_send_cqm_rssi_notify(rdev, dev, rssi_event, gfp);
 916 }
 917 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
 918
 919 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
 920                                  const u8 *peer, u32 num_packets, gfp_t gfp)
 921 {
 922         struct wireless_dev *wdev = dev->ieee80211_ptr;
 923         struct wiphy *wiphy = wdev->wiphy;
 924         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 925
 926         /* Indicate roaming trigger event to user space */
 927         nl80211_send_cqm_pktloss_notify(rdev, dev, peer, num_packets, gfp);
 928 }
 929 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
 930
 931 void cfg80211_cqm_txe_notify(struct net_device *dev,
 932                              const u8 *peer, u32 num_packets,
 933                              u32 rate, u32 intvl, gfp_t gfp)
 934 {
 935         struct wireless_dev *wdev = dev->ieee80211_ptr;
 936         struct wiphy *wiphy = wdev->wiphy;
 937         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 938
 939         nl80211_send_cqm_txe_notify(rdev, dev, peer, num_packets,
 940                                     rate, intvl, gfp);
 941 }
 942 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
 943
 944 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
 945                                const u8 *replay_ctr, gfp_t gfp)
 946 {
 947         struct wireless_dev *wdev = dev->ieee80211_ptr;
 948         struct wiphy *wiphy = wdev->wiphy;
 949         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 950
 951         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
 952 }
 953 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
 954
 955 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
 956                                      const u8 *bssid, bool preauth, gfp_t gfp)
 957 {
 958         struct wireless_dev *wdev = dev->ieee80211_ptr;
 959         struct wiphy *wiphy = wdev->wiphy;
 960         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 961
 962         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
 963 }
 964 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
 965
 966 void cfg80211_ch_switch_notify(struct net_device *dev, int freq,
 967                                enum nl80211_channel_type type)
 968 {
 969         struct wireless_dev *wdev = dev->ieee80211_ptr;
 970         struct wiphy *wiphy = wdev->wiphy;
 971         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 972         struct ieee80211_channel *chan;
 973
 974         wdev_lock(wdev);
 975
 976         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
 977                     wdev->iftype != NL80211_IFTYPE_P2P_GO))
 978                 goto out;
 979
 980         chan = rdev_freq_to_chan(rdev, freq, type);
 981         if (WARN_ON(!chan))
 982                 goto out;
 983
 984         wdev->channel = chan;
 985         nl80211_ch_switch_notify(rdev, dev, freq, type, GFP_KERNEL);
 986 out:
 987         wdev_unlock(wdev);
 988         return;
 989 }
 990 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
 991
 992 bool cfg80211_rx_spurious_frame(struct net_device *dev,
 993                                 const u8 *addr, gfp_t gfp)
 994 {
 995         struct wireless_dev *wdev = dev->ieee80211_ptr;
 996
 997         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
 998                     wdev->iftype != NL80211_IFTYPE_P2P_GO))
 999                 return false;
1000
1001         return nl80211_unexpected_frame(dev, addr, gfp);
1002 }
1003 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
1004
1005 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
1006                                         const u8 *addr, gfp_t gfp)
1007 {
1008         struct wireless_dev *wdev = dev->ieee80211_ptr;
1009
1010         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
1011                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
1012                     wdev->iftype != NL80211_IFTYPE_AP_VLAN))
1013                 return false;
1014
1015         return nl80211_unexpected_4addr_frame(dev, addr, gfp);
1016 }
1017 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);