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         };
 461
 462         ASSERT_WDEV_LOCK(wdev);
 463
 464         if (local_state_change) {
 465                 if (wdev->current_bss &&
 466                     ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) {
 467                         cfg80211_unhold_bss(wdev->current_bss);
 468                         cfg80211_put_bss(&wdev->current_bss->pub);
 469                         wdev->current_bss = NULL;
 470                 }
 471
 472                 return 0;
 473         }
 474
 475         return rdev->ops->deauth(&rdev->wiphy, dev, &req);
 476 }
 477
 478 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 479                          struct net_device *dev, const u8 *bssid,
 480                          const u8 *ie, int ie_len, u16 reason,
 481                          bool local_state_change)
 482 {
 483         struct wireless_dev *wdev = dev->ieee80211_ptr;
 484         int err;
 485
 486         wdev_lock(wdev);
 487         err = __cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason,
 488                                      local_state_change);
 489         wdev_unlock(wdev);
 490
 491         return err;
 492 }
 493
 494 static int __cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 495                                     struct net_device *dev, const u8 *bssid,
 496                                     const u8 *ie, int ie_len, u16 reason,
 497                                     bool local_state_change)
 498 {
 499         struct wireless_dev *wdev = dev->ieee80211_ptr;
 500         struct cfg80211_disassoc_request req;
 501
 502         ASSERT_WDEV_LOCK(wdev);
 503
 504         if (wdev->sme_state != CFG80211_SME_CONNECTED)
 505                 return -ENOTCONN;
 506
 507         if (WARN_ON(!wdev->current_bss))
 508                 return -ENOTCONN;
 509
 510         memset(&req, 0, sizeof(req));
 511         req.reason_code = reason;
 512         req.local_state_change = local_state_change;
 513         req.ie = ie;
 514         req.ie_len = ie_len;
 515         if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
 516                 req.bss = &wdev->current_bss->pub;
 517         else
 518                 return -ENOTCONN;
 519
 520         return rdev->ops->disassoc(&rdev->wiphy, dev, &req);
 521 }
 522
 523 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 524                            struct net_device *dev, const u8 *bssid,
 525                            const u8 *ie, int ie_len, u16 reason,
 526                            bool local_state_change)
 527 {
 528         struct wireless_dev *wdev = dev->ieee80211_ptr;
 529         int err;
 530
 531         wdev_lock(wdev);
 532         err = __cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason,
 533                                        local_state_change);
 534         wdev_unlock(wdev);
 535
 536         return err;
 537 }
 538
 539 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 540                         struct net_device *dev)
 541 {
 542         struct wireless_dev *wdev = dev->ieee80211_ptr;
 543         struct cfg80211_deauth_request req;
 544         u8 bssid[ETH_ALEN];
 545
 546         ASSERT_WDEV_LOCK(wdev);
 547
 548         if (!rdev->ops->deauth)
 549                 return;
 550
 551         memset(&req, 0, sizeof(req));
 552         req.reason_code = WLAN_REASON_DEAUTH_LEAVING;
 553         req.ie = NULL;
 554         req.ie_len = 0;
 555
 556         if (!wdev->current_bss)
 557                 return;
 558
 559         memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN);
 560         req.bssid = bssid;
 561         rdev->ops->deauth(&rdev->wiphy, dev, &req);
 562
 563         if (wdev->current_bss) {
 564                 cfg80211_unhold_bss(wdev->current_bss);
 565                 cfg80211_put_bss(&wdev->current_bss->pub);
 566                 wdev->current_bss = NULL;
 567         }
 568 }
 569
 570 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
 571                                struct ieee80211_channel *chan,
 572                                enum nl80211_channel_type channel_type,
 573                                unsigned int duration, gfp_t gfp)
 574 {
 575         struct wiphy *wiphy = wdev->wiphy;
 576         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 577
 578         nl80211_send_remain_on_channel(rdev, wdev, cookie, chan, channel_type,
 579                                        duration, gfp);
 580 }
 581 EXPORT_SYMBOL(cfg80211_ready_on_channel);
 582
 583 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
 584                                         struct ieee80211_channel *chan,
 585                                         enum nl80211_channel_type channel_type,
 586                                         gfp_t gfp)
 587 {
 588         struct wiphy *wiphy = wdev->wiphy;
 589         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 590
 591         nl80211_send_remain_on_channel_cancel(rdev, wdev, cookie, chan,
 592                                               channel_type, gfp);
 593 }
 594 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
 595
 596 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
 597                       struct station_info *sinfo, gfp_t gfp)
 598 {
 599         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 600         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 601
 602         nl80211_send_sta_event(rdev, dev, mac_addr, sinfo, gfp);
 603 }
 604 EXPORT_SYMBOL(cfg80211_new_sta);
 605
 606 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
 607 {
 608         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 609         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 610
 611         nl80211_send_sta_del_event(rdev, dev, mac_addr, gfp);
 612 }
 613 EXPORT_SYMBOL(cfg80211_del_sta);
 614
 615 struct cfg80211_mgmt_registration {
 616         struct list_head list;
 617
 618         u32 nlpid;
 619
 620         int match_len;
 621
 622         __le16 frame_type;
 623
 624         u8 match[];
 625 };
 626
 627 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
 628                                 u16 frame_type, const u8 *match_data,
 629                                 int match_len)
 630 {
 631         struct wiphy *wiphy = wdev->wiphy;
 632         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 633         struct cfg80211_mgmt_registration *reg, *nreg;
 634         int err = 0;
 635         u16 mgmt_type;
 636
 637         if (!wdev->wiphy->mgmt_stypes)
 638                 return -EOPNOTSUPP;
 639
 640         if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT)
 641                 return -EINVAL;
 642
 643         if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE))
 644                 return -EINVAL;
 645
 646         mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4;
 647         if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type)))
 648                 return -EINVAL;
 649
 650         nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
 651         if (!nreg)
 652                 return -ENOMEM;
 653
 654         spin_lock_bh(&wdev->mgmt_registrations_lock);
 655
 656         list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
 657                 int mlen = min(match_len, reg->match_len);
 658
 659                 if (frame_type != le16_to_cpu(reg->frame_type))
 660                         continue;
 661
 662                 if (memcmp(reg->match, match_data, mlen) == 0) {
 663                         err = -EALREADY;
 664                         break;
 665                 }
 666         }
 667
 668         if (err) {
 669                 kfree(nreg);
 670                 goto out;
 671         }
 672
 673         memcpy(nreg->match, match_data, match_len);
 674         nreg->match_len = match_len;
 675         nreg->nlpid = snd_pid;
 676         nreg->frame_type = cpu_to_le16(frame_type);
 677         list_add(&nreg->list, &wdev->mgmt_registrations);
 678
 679         if (rdev->ops->mgmt_frame_register)
 680                 rdev->ops->mgmt_frame_register(wiphy, wdev, frame_type, true);
 681
 682  out:
 683         spin_unlock_bh(&wdev->mgmt_registrations_lock);
 684
 685         return err;
 686 }
 687
 688 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid)
 689 {
 690         struct wiphy *wiphy = wdev->wiphy;
 691         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 692         struct cfg80211_mgmt_registration *reg, *tmp;
 693
 694         spin_lock_bh(&wdev->mgmt_registrations_lock);
 695
 696         list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
 697                 if (reg->nlpid != nlpid)
 698                         continue;
 699
 700                 if (rdev->ops->mgmt_frame_register) {
 701                         u16 frame_type = le16_to_cpu(reg->frame_type);
 702
 703                         rdev->ops->mgmt_frame_register(wiphy, wdev,
 704                                                        frame_type, false);
 705                 }
 706
 707                 list_del(&reg->list);
 708                 kfree(reg);
 709         }
 710
 711         spin_unlock_bh(&wdev->mgmt_registrations_lock);
 712
 713         if (nlpid == wdev->ap_unexpected_nlpid)
 714                 wdev->ap_unexpected_nlpid = 0;
 715 }
 716
 717 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev)
 718 {
 719         struct cfg80211_mgmt_registration *reg, *tmp;
 720
 721         spin_lock_bh(&wdev->mgmt_registrations_lock);
 722
 723         list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
 724                 list_del(&reg->list);
 725                 kfree(reg);
 726         }
 727
 728         spin_unlock_bh(&wdev->mgmt_registrations_lock);
 729 }
 730
 731 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 732                           struct wireless_dev *wdev,
 733                           struct ieee80211_channel *chan, bool offchan,
 734                           enum nl80211_channel_type channel_type,
 735                           bool channel_type_valid, unsigned int wait,
 736                           const u8 *buf, size_t len, bool no_cck,
 737                           bool dont_wait_for_ack, u64 *cookie)
 738 {
 739         struct net_device *dev = wdev->netdev;
 740         const struct ieee80211_mgmt *mgmt;
 741         u16 stype;
 742
 743         if (!wdev->wiphy->mgmt_stypes)
 744                 return -EOPNOTSUPP;
 745
 746         if (!rdev->ops->mgmt_tx)
 747                 return -EOPNOTSUPP;
 748
 749         if (len < 24 + 1)
 750                 return -EINVAL;
 751
 752         mgmt = (const struct ieee80211_mgmt *) buf;
 753
 754         if (!ieee80211_is_mgmt(mgmt->frame_control))
 755                 return -EINVAL;
 756
 757         stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
 758         if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4)))
 759                 return -EINVAL;
 760
 761         if (ieee80211_is_action(mgmt->frame_control) &&
 762             mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
 763                 int err = 0;
 764
 765                 wdev_lock(wdev);
 766
 767                 switch (wdev->iftype) {
 768                 case NL80211_IFTYPE_ADHOC:
 769                 case NL80211_IFTYPE_STATION:
 770                 case NL80211_IFTYPE_P2P_CLIENT:
 771                         if (!wdev->current_bss) {
 772                                 err = -ENOTCONN;
 773                                 break;
 774                         }
 775
 776                         if (!ether_addr_equal(wdev->current_bss->pub.bssid,
 777                                               mgmt->bssid)) {
 778                                 err = -ENOTCONN;
 779                                 break;
 780                         }
 781
 782                         /*
 783                          * check for IBSS DA must be done by driver as
 784                          * cfg80211 doesn't track the stations
 785                          */
 786                         if (wdev->iftype == NL80211_IFTYPE_ADHOC)
 787                                 break;
 788
 789                         /* for station, check that DA is the AP */
 790                         if (!ether_addr_equal(wdev->current_bss->pub.bssid,
 791                                               mgmt->da)) {
 792                                 err = -ENOTCONN;
 793                                 break;
 794                         }
 795                         break;
 796                 case NL80211_IFTYPE_AP:
 797                 case NL80211_IFTYPE_P2P_GO:
 798                 case NL80211_IFTYPE_AP_VLAN:
 799                         if (!ether_addr_equal(mgmt->bssid, dev->dev_addr))
 800                                 err = -EINVAL;
 801                         break;
 802                 case NL80211_IFTYPE_MESH_POINT:
 803                         if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) {
 804                                 err = -EINVAL;
 805                                 break;
 806                         }
 807                         /*
 808                          * check for mesh DA must be done by driver as
 809                          * cfg80211 doesn't track the stations
 810                          */
 811                         break;
 812                 default:
 813                         err = -EOPNOTSUPP;
 814                         break;
 815                 }
 816                 wdev_unlock(wdev);
 817
 818                 if (err)
 819                         return err;
 820         }
 821
 822         if (!ether_addr_equal(mgmt->sa, dev->dev_addr))
 823                 return -EINVAL;
 824
 825         /* Transmit the Action frame as requested by user space */
 826         return rdev->ops->mgmt_tx(&rdev->wiphy, wdev, chan, offchan,
 827                                   channel_type, channel_type_valid,
 828                                   wait, buf, len, no_cck, dont_wait_for_ack,
 829                                   cookie);
 830 }
 831
 832 bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm,
 833                       const u8 *buf, size_t len, gfp_t gfp)
 834 {
 835         struct wiphy *wiphy = wdev->wiphy;
 836         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 837         struct cfg80211_mgmt_registration *reg;
 838         const struct ieee80211_txrx_stypes *stypes =
 839                 &wiphy->mgmt_stypes[wdev->iftype];
 840         struct ieee80211_mgmt *mgmt = (void *)buf;
 841         const u8 *data;
 842         int data_len;
 843         bool result = false;
 844         __le16 ftype = mgmt->frame_control &
 845                 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE);
 846         u16 stype;
 847
 848         stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
 849
 850         if (!(stypes->rx & BIT(stype)))
 851                 return false;
 852
 853         data = buf + ieee80211_hdrlen(mgmt->frame_control);
 854         data_len = len - ieee80211_hdrlen(mgmt->frame_control);
 855
 856         spin_lock_bh(&wdev->mgmt_registrations_lock);
 857
 858         list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
 859                 if (reg->frame_type != ftype)
 860                         continue;
 861
 862                 if (reg->match_len > data_len)
 863                         continue;
 864
 865                 if (memcmp(reg->match, data, reg->match_len))
 866                         continue;
 867
 868                 /* found match! */
 869
 870                 /* Indicate the received Action frame to user space */
 871                 if (nl80211_send_mgmt(rdev, wdev, reg->nlpid,
 872                                       freq, sig_mbm,
 873                                       buf, len, gfp))
 874                         continue;
 875
 876                 result = true;
 877                 break;
 878         }
 879
 880         spin_unlock_bh(&wdev->mgmt_registrations_lock);
 881
 882         return result;
 883 }
 884 EXPORT_SYMBOL(cfg80211_rx_mgmt);
 885
 886 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
 887                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
 888 {
 889         struct wiphy *wiphy = wdev->wiphy;
 890         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 891
 892         /* Indicate TX status of the Action frame to user space */
 893         nl80211_send_mgmt_tx_status(rdev, wdev, cookie, buf, len, ack, gfp);
 894 }
 895 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
 896
 897 void cfg80211_cqm_rssi_notify(struct net_device *dev,
 898                               enum nl80211_cqm_rssi_threshold_event rssi_event,
 899                               gfp_t gfp)
 900 {
 901         struct wireless_dev *wdev = dev->ieee80211_ptr;
 902         struct wiphy *wiphy = wdev->wiphy;
 903         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 904
 905         /* Indicate roaming trigger event to user space */
 906         nl80211_send_cqm_rssi_notify(rdev, dev, rssi_event, gfp);
 907 }
 908 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
 909
 910 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
 911                                  const u8 *peer, u32 num_packets, gfp_t gfp)
 912 {
 913         struct wireless_dev *wdev = dev->ieee80211_ptr;
 914         struct wiphy *wiphy = wdev->wiphy;
 915         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 916
 917         /* Indicate roaming trigger event to user space */
 918         nl80211_send_cqm_pktloss_notify(rdev, dev, peer, num_packets, gfp);
 919 }
 920 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
 921
 922 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
 923                                const u8 *replay_ctr, gfp_t gfp)
 924 {
 925         struct wireless_dev *wdev = dev->ieee80211_ptr;
 926         struct wiphy *wiphy = wdev->wiphy;
 927         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 928
 929         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
 930 }
 931 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
 932
 933 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
 934                                      const u8 *bssid, bool preauth, gfp_t gfp)
 935 {
 936         struct wireless_dev *wdev = dev->ieee80211_ptr;
 937         struct wiphy *wiphy = wdev->wiphy;
 938         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 939
 940         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
 941 }
 942 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
 943
 944 void cfg80211_ch_switch_notify(struct net_device *dev, int freq,
 945                                enum nl80211_channel_type type)
 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         struct ieee80211_channel *chan;
 951
 952         wdev_lock(wdev);
 953
 954         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
 955                     wdev->iftype != NL80211_IFTYPE_P2P_GO))
 956                 goto out;
 957
 958         chan = rdev_freq_to_chan(rdev, freq, type);
 959         if (WARN_ON(!chan))
 960                 goto out;
 961
 962         wdev->channel = chan;
 963         nl80211_ch_switch_notify(rdev, dev, freq, type, GFP_KERNEL);
 964 out:
 965         wdev_unlock(wdev);
 966         return;
 967 }
 968 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
 969
 970 bool cfg80211_rx_spurious_frame(struct net_device *dev,
 971                                 const u8 *addr, gfp_t gfp)
 972 {
 973         struct wireless_dev *wdev = dev->ieee80211_ptr;
 974
 975         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
 976                     wdev->iftype != NL80211_IFTYPE_P2P_GO))
 977                 return false;
 978
 979         return nl80211_unexpected_frame(dev, addr, gfp);
 980 }
 981 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
 982
 983 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
 984                                         const u8 *addr, gfp_t gfp)
 985 {
 986         struct wireless_dev *wdev = dev->ieee80211_ptr;
 987
 988         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
 989                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
 990                     wdev->iftype != NL80211_IFTYPE_AP_VLAN))
 991                 return false;
 992
 993         return nl80211_unexpected_4addr_frame(dev, addr, gfp);
 994 }
 995 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);