Pileus Git - ~andy/linux/blob - 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 #include "rdev-ops.h"
  19
  20
  21 void cfg80211_send_rx_auth(struct net_device *dev, const u8 *buf, size_t len)
  22 {
  23         struct wireless_dev *wdev = dev->ieee80211_ptr;
  24         struct wiphy *wiphy = wdev->wiphy;
  25         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
  26
  27         trace_cfg80211_send_rx_auth(dev);
  28         wdev_lock(wdev);
  29
  30         nl80211_send_rx_auth(rdev, dev, buf, len, GFP_KERNEL);
  31         cfg80211_sme_rx_auth(dev, buf, len);
  32
  33         wdev_unlock(wdev);
  34 }
  35 EXPORT_SYMBOL(cfg80211_send_rx_auth);
  36
  37 void cfg80211_send_rx_assoc(struct net_device *dev, struct cfg80211_bss *bss,
  38                             const u8 *buf, size_t len)
  39 {
  40         u16 status_code;
  41         struct wireless_dev *wdev = dev->ieee80211_ptr;
  42         struct wiphy *wiphy = wdev->wiphy;
  43         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
  44         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
  45         u8 *ie = mgmt->u.assoc_resp.variable;
  46         int ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
  47
  48         trace_cfg80211_send_rx_assoc(dev, bss);
  49         wdev_lock(wdev);
  50
  51         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
  52
  53         /*
  54          * This is a bit of a hack, we don't notify userspace of
  55          * a (re-)association reply if we tried to send a reassoc
  56          * and got a reject -- we only try again with an assoc
  57          * frame instead of reassoc.
  58          */
  59         if (status_code != WLAN_STATUS_SUCCESS && wdev->conn &&
  60             cfg80211_sme_failed_reassoc(wdev)) {
  61                 cfg80211_put_bss(wiphy, bss);
  62                 goto out;
  63         }
  64
  65         nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL);
  66
  67         if (status_code != WLAN_STATUS_SUCCESS && wdev->conn) {
  68                 cfg80211_sme_failed_assoc(wdev);
  69                 /*
  70                  * do not call connect_result() now because the
  71                  * sme will schedule work that does it later.
  72                  */
  73                 cfg80211_put_bss(wiphy, bss);
  74                 goto out;
  75         }
  76
  77         if (!wdev->conn && wdev->sme_state == CFG80211_SME_IDLE) {
  78                 /*
  79                  * This is for the userspace SME, the CONNECTING
  80                  * state will be changed to CONNECTED by
  81                  * __cfg80211_connect_result() below.
  82                  */
  83                 wdev->sme_state = CFG80211_SME_CONNECTING;
  84         }
  85
  86         /* this consumes the bss reference */
  87         __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
  88                                   status_code,
  89                                   status_code == WLAN_STATUS_SUCCESS, bss);
  90  out:
  91         wdev_unlock(wdev);
  92 }
  93 EXPORT_SYMBOL(cfg80211_send_rx_assoc);
  94
  95 void __cfg80211_send_deauth(struct net_device *dev,
  96                                    const u8 *buf, size_t len)
  97 {
  98         struct wireless_dev *wdev = dev->ieee80211_ptr;
  99         struct wiphy *wiphy = wdev->wiphy;
 100         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 101         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 102         const u8 *bssid = mgmt->bssid;
 103         bool was_current = false;
 104
 105         trace___cfg80211_send_deauth(dev);
 106         ASSERT_WDEV_LOCK(wdev);
 107
 108         if (wdev->current_bss &&
 109             ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) {
 110                 cfg80211_unhold_bss(wdev->current_bss);
 111                 cfg80211_put_bss(wiphy, &wdev->current_bss->pub);
 112                 wdev->current_bss = NULL;
 113                 was_current = true;
 114         }
 115
 116         nl80211_send_deauth(rdev, dev, buf, len, GFP_KERNEL);
 117
 118         if (wdev->sme_state == CFG80211_SME_CONNECTED && was_current) {
 119                 u16 reason_code;
 120                 bool from_ap;
 121
 122                 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
 123
 124                 from_ap = !ether_addr_equal(mgmt->sa, dev->dev_addr);
 125                 __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
 126         } else if (wdev->sme_state == CFG80211_SME_CONNECTING) {
 127                 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
 128                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 129                                           false, NULL);
 130         }
 131 }
 132 EXPORT_SYMBOL(__cfg80211_send_deauth);
 133
 134 void cfg80211_send_deauth(struct net_device *dev, const u8 *buf, size_t len)
 135 {
 136         struct wireless_dev *wdev = dev->ieee80211_ptr;
 137
 138         wdev_lock(wdev);
 139         __cfg80211_send_deauth(dev, buf, len);
 140         wdev_unlock(wdev);
 141 }
 142 EXPORT_SYMBOL(cfg80211_send_deauth);
 143
 144 void __cfg80211_send_disassoc(struct net_device *dev,
 145                                      const u8 *buf, size_t len)
 146 {
 147         struct wireless_dev *wdev = dev->ieee80211_ptr;
 148         struct wiphy *wiphy = wdev->wiphy;
 149         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 150         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 151         const u8 *bssid = mgmt->bssid;
 152         u16 reason_code;
 153         bool from_ap;
 154
 155         trace___cfg80211_send_disassoc(dev);
 156         ASSERT_WDEV_LOCK(wdev);
 157
 158         nl80211_send_disassoc(rdev, dev, buf, len, GFP_KERNEL);
 159
 160         if (wdev->sme_state != CFG80211_SME_CONNECTED)
 161                 return;
 162
 163         if (wdev->current_bss &&
 164             ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) {
 165                 cfg80211_sme_disassoc(dev, wdev->current_bss);
 166                 cfg80211_unhold_bss(wdev->current_bss);
 167                 cfg80211_put_bss(wiphy, &wdev->current_bss->pub);
 168                 wdev->current_bss = NULL;
 169         } else
 170                 WARN_ON(1);
 171
 172
 173         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
 174
 175         from_ap = !ether_addr_equal(mgmt->sa, dev->dev_addr);
 176         __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
 177 }
 178 EXPORT_SYMBOL(__cfg80211_send_disassoc);
 179
 180 void cfg80211_send_disassoc(struct net_device *dev, const u8 *buf, size_t len)
 181 {
 182         struct wireless_dev *wdev = dev->ieee80211_ptr;
 183
 184         wdev_lock(wdev);
 185         __cfg80211_send_disassoc(dev, buf, len);
 186         wdev_unlock(wdev);
 187 }
 188 EXPORT_SYMBOL(cfg80211_send_disassoc);
 189
 190 void cfg80211_send_auth_timeout(struct net_device *dev, const u8 *addr)
 191 {
 192         struct wireless_dev *wdev = dev->ieee80211_ptr;
 193         struct wiphy *wiphy = wdev->wiphy;
 194         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 195
 196         trace_cfg80211_send_auth_timeout(dev, addr);
 197         wdev_lock(wdev);
 198
 199         nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
 200         if (wdev->sme_state == CFG80211_SME_CONNECTING)
 201                 __cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
 202                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 203                                           false, NULL);
 204
 205         wdev_unlock(wdev);
 206 }
 207 EXPORT_SYMBOL(cfg80211_send_auth_timeout);
 208
 209 void cfg80211_send_assoc_timeout(struct net_device *dev, const u8 *addr)
 210 {
 211         struct wireless_dev *wdev = dev->ieee80211_ptr;
 212         struct wiphy *wiphy = wdev->wiphy;
 213         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 214
 215         trace_cfg80211_send_assoc_timeout(dev, addr);
 216         wdev_lock(wdev);
 217
 218         nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL);
 219         if (wdev->sme_state == CFG80211_SME_CONNECTING)
 220                 __cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
 221                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 222                                           false, NULL);
 223
 224         wdev_unlock(wdev);
 225 }
 226 EXPORT_SYMBOL(cfg80211_send_assoc_timeout);
 227
 228 void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
 229                                   enum nl80211_key_type key_type, int key_id,
 230                                   const u8 *tsc, gfp_t gfp)
 231 {
 232         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 233         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 234 #ifdef CONFIG_CFG80211_WEXT
 235         union iwreq_data wrqu;
 236         char *buf = kmalloc(128, gfp);
 237
 238         if (buf) {
 239                 sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
 240                         "keyid=%d %scast addr=%pM)", key_id,
 241                         key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni",
 242                         addr);
 243                 memset(&wrqu, 0, sizeof(wrqu));
 244                 wrqu.data.length = strlen(buf);
 245                 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 246                 kfree(buf);
 247         }
 248 #endif
 249
 250         trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc);
 251         nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
 252 }
 253 EXPORT_SYMBOL(cfg80211_michael_mic_failure);
 254
 255 /* some MLME handling for userspace SME */
 256 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 257                          struct net_device *dev,
 258                          struct ieee80211_channel *chan,
 259                          enum nl80211_auth_type auth_type,
 260                          const u8 *bssid,
 261                          const u8 *ssid, int ssid_len,
 262                          const u8 *ie, int ie_len,
 263                          const u8 *key, int key_len, int key_idx,
 264                          const u8 *sae_data, int sae_data_len)
 265 {
 266         struct wireless_dev *wdev = dev->ieee80211_ptr;
 267         struct cfg80211_auth_request req;
 268         int err;
 269
 270         ASSERT_WDEV_LOCK(wdev);
 271
 272         if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
 273                 if (!key || !key_len || key_idx < 0 || key_idx > 4)
 274                         return -EINVAL;
 275
 276         if (wdev->current_bss &&
 277             ether_addr_equal(bssid, wdev->current_bss->pub.bssid))
 278                 return -EALREADY;
 279
 280         memset(&req, 0, sizeof(req));
 281
 282         req.ie = ie;
 283         req.ie_len = ie_len;
 284         req.sae_data = sae_data;
 285         req.sae_data_len = sae_data_len;
 286         req.auth_type = auth_type;
 287         req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
 288                                    WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 289         req.key = key;
 290         req.key_len = key_len;
 291         req.key_idx = key_idx;
 292         if (!req.bss)
 293                 return -ENOENT;
 294
 295         err = cfg80211_can_use_chan(rdev, wdev, req.bss->channel,
 296                                     CHAN_MODE_SHARED);
 297         if (err)
 298                 goto out;
 299
 300         err = rdev_auth(rdev, dev, &req);
 301
 302 out:
 303         cfg80211_put_bss(&rdev->wiphy, req.bss);
 304         return err;
 305 }
 306
 307 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 308                        struct net_device *dev, struct ieee80211_channel *chan,
 309                        enum nl80211_auth_type auth_type, const u8 *bssid,
 310                        const u8 *ssid, int ssid_len,
 311                        const u8 *ie, int ie_len,
 312                        const u8 *key, int key_len, int key_idx,
 313                        const u8 *sae_data, int sae_data_len)
 314 {
 315         int err;
 316
 317         mutex_lock(&rdev->devlist_mtx);
 318         wdev_lock(dev->ieee80211_ptr);
 319         err = __cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
 320                                    ssid, ssid_len, ie, ie_len,
 321                                    key, key_len, key_idx,
 322                                    sae_data, sae_data_len);
 323         wdev_unlock(dev->ieee80211_ptr);
 324         mutex_unlock(&rdev->devlist_mtx);
 325
 326         return err;
 327 }
 328
 329 /*  Do a logical ht_capa &= ht_capa_mask.  */
 330 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
 331                                const struct ieee80211_ht_cap *ht_capa_mask)
 332 {
 333         int i;
 334         u8 *p1, *p2;
 335         if (!ht_capa_mask) {
 336                 memset(ht_capa, 0, sizeof(*ht_capa));
 337                 return;
 338         }
 339
 340         p1 = (u8*)(ht_capa);
 341         p2 = (u8*)(ht_capa_mask);
 342         for (i = 0; i<sizeof(*ht_capa); i++)
 343                 p1[i] &= p2[i];
 344 }
 345
 346 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 347                           struct net_device *dev,
 348                           struct ieee80211_channel *chan,
 349                           const u8 *bssid, const u8 *prev_bssid,
 350                           const u8 *ssid, int ssid_len,
 351                           const u8 *ie, int ie_len, bool use_mfp,
 352                           struct cfg80211_crypto_settings *crypt,
 353                           u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
 354                           struct ieee80211_ht_cap *ht_capa_mask)
 355 {
 356         struct wireless_dev *wdev = dev->ieee80211_ptr;
 357         struct cfg80211_assoc_request req;
 358         int err;
 359         bool was_connected = false;
 360
 361         ASSERT_WDEV_LOCK(wdev);
 362
 363         memset(&req, 0, sizeof(req));
 364
 365         if (wdev->current_bss && prev_bssid &&
 366             ether_addr_equal(wdev->current_bss->pub.bssid, prev_bssid)) {
 367                 /*
 368                  * Trying to reassociate: Allow this to proceed and let the old
 369                  * association to be dropped when the new one is completed.
 370                  */
 371                 if (wdev->sme_state == CFG80211_SME_CONNECTED) {
 372                         was_connected = true;
 373                         wdev->sme_state = CFG80211_SME_CONNECTING;
 374                 }
 375         } else if (wdev->current_bss)
 376                 return -EALREADY;
 377
 378         req.ie = ie;
 379         req.ie_len = ie_len;
 380         memcpy(&req.crypto, crypt, sizeof(req.crypto));
 381         req.use_mfp = use_mfp;
 382         req.prev_bssid = prev_bssid;
 383         req.flags = assoc_flags;
 384         if (ht_capa)
 385                 memcpy(&req.ht_capa, ht_capa, sizeof(req.ht_capa));
 386         if (ht_capa_mask)
 387                 memcpy(&req.ht_capa_mask, ht_capa_mask,
 388                        sizeof(req.ht_capa_mask));
 389         cfg80211_oper_and_ht_capa(&req.ht_capa_mask,
 390                                   rdev->wiphy.ht_capa_mod_mask);
 391
 392         req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
 393                                    WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 394         if (!req.bss) {
 395                 if (was_connected)
 396                         wdev->sme_state = CFG80211_SME_CONNECTED;
 397                 return -ENOENT;
 398         }
 399
 400         err = cfg80211_can_use_chan(rdev, wdev, req.bss->channel,
 401                                     CHAN_MODE_SHARED);
 402         if (err)
 403                 goto out;
 404
 405         err = rdev_assoc(rdev, dev, &req);
 406
 407 out:
 408         if (err) {
 409                 if (was_connected)
 410                         wdev->sme_state = CFG80211_SME_CONNECTED;
 411                 cfg80211_put_bss(&rdev->wiphy, req.bss);
 412         }
 413
 414         return err;
 415 }
 416
 417 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 418                         struct net_device *dev,
 419                         struct ieee80211_channel *chan,
 420                         const u8 *bssid, const u8 *prev_bssid,
 421                         const u8 *ssid, int ssid_len,
 422                         const u8 *ie, int ie_len, bool use_mfp,
 423                         struct cfg80211_crypto_settings *crypt,
 424                         u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
 425                         struct ieee80211_ht_cap *ht_capa_mask)
 426 {
 427         struct wireless_dev *wdev = dev->ieee80211_ptr;
 428         int err;
 429
 430         mutex_lock(&rdev->devlist_mtx);
 431         wdev_lock(wdev);
 432         err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
 433                                     ssid, ssid_len, ie, ie_len, use_mfp, crypt,
 434                                     assoc_flags, ht_capa, ht_capa_mask);
 435         wdev_unlock(wdev);
 436         mutex_unlock(&rdev->devlist_mtx);
 437
 438         return err;
 439 }
 440
 441 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 442                            struct net_device *dev, const u8 *bssid,
 443                            const u8 *ie, int ie_len, u16 reason,
 444                            bool local_state_change)
 445 {
 446         struct wireless_dev *wdev = dev->ieee80211_ptr;
 447         struct cfg80211_deauth_request req = {
 448                 .bssid = bssid,
 449                 .reason_code = reason,
 450                 .ie = ie,
 451                 .ie_len = ie_len,
 452                 .local_state_change = local_state_change,
 453         };
 454
 455         ASSERT_WDEV_LOCK(wdev);
 456
 457         if (local_state_change && (!wdev->current_bss ||
 458             !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
 459                 return 0;
 460
 461         return rdev_deauth(rdev, dev, &req);
 462 }
 463
 464 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 465                          struct net_device *dev, const u8 *bssid,
 466                          const u8 *ie, int ie_len, u16 reason,
 467                          bool local_state_change)
 468 {
 469         struct wireless_dev *wdev = dev->ieee80211_ptr;
 470         int err;
 471
 472         wdev_lock(wdev);
 473         err = __cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason,
 474                                      local_state_change);
 475         wdev_unlock(wdev);
 476
 477         return err;
 478 }
 479
 480 static int __cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 481                                     struct net_device *dev, const u8 *bssid,
 482                                     const u8 *ie, int ie_len, u16 reason,
 483                                     bool local_state_change)
 484 {
 485         struct wireless_dev *wdev = dev->ieee80211_ptr;
 486         struct cfg80211_disassoc_request req;
 487
 488         ASSERT_WDEV_LOCK(wdev);
 489
 490         if (wdev->sme_state != CFG80211_SME_CONNECTED)
 491                 return -ENOTCONN;
 492
 493         if (WARN(!wdev->current_bss, "sme_state=%d\n", wdev->sme_state))
 494                 return -ENOTCONN;
 495
 496         memset(&req, 0, sizeof(req));
 497         req.reason_code = reason;
 498         req.local_state_change = local_state_change;
 499         req.ie = ie;
 500         req.ie_len = ie_len;
 501         if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
 502                 req.bss = &wdev->current_bss->pub;
 503         else
 504                 return -ENOTCONN;
 505
 506         return rdev_disassoc(rdev, dev, &req);
 507 }
 508
 509 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 510                            struct net_device *dev, const u8 *bssid,
 511                            const u8 *ie, int ie_len, u16 reason,
 512                            bool local_state_change)
 513 {
 514         struct wireless_dev *wdev = dev->ieee80211_ptr;
 515         int err;
 516
 517         wdev_lock(wdev);
 518         err = __cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason,
 519                                        local_state_change);
 520         wdev_unlock(wdev);
 521
 522         return err;
 523 }
 524
 525 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 526                         struct net_device *dev)
 527 {
 528         struct wireless_dev *wdev = dev->ieee80211_ptr;
 529         struct cfg80211_deauth_request req;
 530         u8 bssid[ETH_ALEN];
 531
 532         ASSERT_WDEV_LOCK(wdev);
 533
 534         if (!rdev->ops->deauth)
 535                 return;
 536
 537         memset(&req, 0, sizeof(req));
 538         req.reason_code = WLAN_REASON_DEAUTH_LEAVING;
 539         req.ie = NULL;
 540         req.ie_len = 0;
 541
 542         if (!wdev->current_bss)
 543                 return;
 544
 545         memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN);
 546         req.bssid = bssid;
 547         rdev_deauth(rdev, dev, &req);
 548
 549         if (wdev->current_bss) {
 550                 cfg80211_unhold_bss(wdev->current_bss);
 551                 cfg80211_put_bss(&rdev->wiphy, &wdev->current_bss->pub);
 552                 wdev->current_bss = NULL;
 553         }
 554 }
 555
 556 struct cfg80211_mgmt_registration {
 557         struct list_head list;
 558
 559         u32 nlportid;
 560
 561         int match_len;
 562
 563         __le16 frame_type;
 564
 565         u8 match[];
 566 };
 567
 568 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
 569                                 u16 frame_type, const u8 *match_data,
 570                                 int match_len)
 571 {
 572         struct wiphy *wiphy = wdev->wiphy;
 573         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 574         struct cfg80211_mgmt_registration *reg, *nreg;
 575         int err = 0;
 576         u16 mgmt_type;
 577
 578         if (!wdev->wiphy->mgmt_stypes)
 579                 return -EOPNOTSUPP;
 580
 581         if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT)
 582                 return -EINVAL;
 583
 584         if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE))
 585                 return -EINVAL;
 586
 587         mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4;
 588         if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type)))
 589                 return -EINVAL;
 590
 591         nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
 592         if (!nreg)
 593                 return -ENOMEM;
 594
 595         spin_lock_bh(&wdev->mgmt_registrations_lock);
 596
 597         list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
 598                 int mlen = min(match_len, reg->match_len);
 599
 600                 if (frame_type != le16_to_cpu(reg->frame_type))
 601                         continue;
 602
 603                 if (memcmp(reg->match, match_data, mlen) == 0) {
 604                         err = -EALREADY;
 605                         break;
 606                 }
 607         }
 608
 609         if (err) {
 610                 kfree(nreg);
 611                 goto out;
 612         }
 613
 614         memcpy(nreg->match, match_data, match_len);
 615         nreg->match_len = match_len;
 616         nreg->nlportid = snd_portid;
 617         nreg->frame_type = cpu_to_le16(frame_type);
 618         list_add(&nreg->list, &wdev->mgmt_registrations);
 619
 620         if (rdev->ops->mgmt_frame_register)
 621                 rdev_mgmt_frame_register(rdev, wdev, frame_type, true);
 622
 623  out:
 624         spin_unlock_bh(&wdev->mgmt_registrations_lock);
 625
 626         return err;
 627 }
 628
 629 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid)
 630 {
 631         struct wiphy *wiphy = wdev->wiphy;
 632         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 633         struct cfg80211_mgmt_registration *reg, *tmp;
 634
 635         spin_lock_bh(&wdev->mgmt_registrations_lock);
 636
 637         list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
 638                 if (reg->nlportid != nlportid)
 639                         continue;
 640
 641                 if (rdev->ops->mgmt_frame_register) {
 642                         u16 frame_type = le16_to_cpu(reg->frame_type);
 643
 644                         rdev_mgmt_frame_register(rdev, wdev,
 645                                                  frame_type, false);
 646                 }
 647
 648                 list_del(&reg->list);
 649                 kfree(reg);
 650         }
 651
 652         spin_unlock_bh(&wdev->mgmt_registrations_lock);
 653
 654         if (nlportid == wdev->ap_unexpected_nlportid)
 655                 wdev->ap_unexpected_nlportid = 0;
 656 }
 657
 658 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev)
 659 {
 660         struct cfg80211_mgmt_registration *reg, *tmp;
 661
 662         spin_lock_bh(&wdev->mgmt_registrations_lock);
 663
 664         list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
 665                 list_del(&reg->list);
 666                 kfree(reg);
 667         }
 668
 669         spin_unlock_bh(&wdev->mgmt_registrations_lock);
 670 }
 671
 672 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 673                           struct wireless_dev *wdev,
 674                           struct ieee80211_channel *chan, bool offchan,
 675                           unsigned int wait, const u8 *buf, size_t len,
 676                           bool no_cck, bool dont_wait_for_ack, u64 *cookie)
 677 {
 678         const struct ieee80211_mgmt *mgmt;
 679         u16 stype;
 680
 681         if (!wdev->wiphy->mgmt_stypes)
 682                 return -EOPNOTSUPP;
 683
 684         if (!rdev->ops->mgmt_tx)
 685                 return -EOPNOTSUPP;
 686
 687         if (len < 24 + 1)
 688                 return -EINVAL;
 689
 690         mgmt = (const struct ieee80211_mgmt *) buf;
 691
 692         if (!ieee80211_is_mgmt(mgmt->frame_control))
 693                 return -EINVAL;
 694
 695         stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
 696         if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4)))
 697                 return -EINVAL;
 698
 699         if (ieee80211_is_action(mgmt->frame_control) &&
 700             mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
 701                 int err = 0;
 702
 703                 wdev_lock(wdev);
 704
 705                 switch (wdev->iftype) {
 706                 case NL80211_IFTYPE_ADHOC:
 707                 case NL80211_IFTYPE_STATION:
 708                 case NL80211_IFTYPE_P2P_CLIENT:
 709                         if (!wdev->current_bss) {
 710                                 err = -ENOTCONN;
 711                                 break;
 712                         }
 713
 714                         if (!ether_addr_equal(wdev->current_bss->pub.bssid,
 715                                               mgmt->bssid)) {
 716                                 err = -ENOTCONN;
 717                                 break;
 718                         }
 719
 720                         /*
 721                          * check for IBSS DA must be done by driver as
 722                          * cfg80211 doesn't track the stations
 723                          */
 724                         if (wdev->iftype == NL80211_IFTYPE_ADHOC)
 725                                 break;
 726
 727                         /* for station, check that DA is the AP */
 728                         if (!ether_addr_equal(wdev->current_bss->pub.bssid,
 729                                               mgmt->da)) {
 730                                 err = -ENOTCONN;
 731                                 break;
 732                         }
 733                         break;
 734                 case NL80211_IFTYPE_AP:
 735                 case NL80211_IFTYPE_P2P_GO:
 736                 case NL80211_IFTYPE_AP_VLAN:
 737                         if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)))
 738                                 err = -EINVAL;
 739                         break;
 740                 case NL80211_IFTYPE_MESH_POINT:
 741                         if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) {
 742                                 err = -EINVAL;
 743                                 break;
 744                         }
 745                         /*
 746                          * check for mesh DA must be done by driver as
 747                          * cfg80211 doesn't track the stations
 748                          */
 749                         break;
 750                 case NL80211_IFTYPE_P2P_DEVICE:
 751                         /*
 752                          * fall through, P2P device only supports
 753                          * public action frames
 754                          */
 755                 default:
 756                         err = -EOPNOTSUPP;
 757                         break;
 758                 }
 759                 wdev_unlock(wdev);
 760
 761                 if (err)
 762                         return err;
 763         }
 764
 765         if (!ether_addr_equal(mgmt->sa, wdev_address(wdev)))
 766                 return -EINVAL;
 767
 768         /* Transmit the Action frame as requested by user space */
 769         return rdev_mgmt_tx(rdev, wdev, chan, offchan,
 770                             wait, buf, len, no_cck, dont_wait_for_ack,
 771                             cookie);
 772 }
 773
 774 bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm,
 775                       const u8 *buf, size_t len, gfp_t gfp)
 776 {
 777         struct wiphy *wiphy = wdev->wiphy;
 778         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 779         struct cfg80211_mgmt_registration *reg;
 780         const struct ieee80211_txrx_stypes *stypes =
 781                 &wiphy->mgmt_stypes[wdev->iftype];
 782         struct ieee80211_mgmt *mgmt = (void *)buf;
 783         const u8 *data;
 784         int data_len;
 785         bool result = false;
 786         __le16 ftype = mgmt->frame_control &
 787                 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE);
 788         u16 stype;
 789
 790         trace_cfg80211_rx_mgmt(wdev, freq, sig_mbm);
 791         stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
 792
 793         if (!(stypes->rx & BIT(stype))) {
 794                 trace_cfg80211_return_bool(false);
 795                 return false;
 796         }
 797
 798         data = buf + ieee80211_hdrlen(mgmt->frame_control);
 799         data_len = len - ieee80211_hdrlen(mgmt->frame_control);
 800
 801         spin_lock_bh(&wdev->mgmt_registrations_lock);
 802
 803         list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
 804                 if (reg->frame_type != ftype)
 805                         continue;
 806
 807                 if (reg->match_len > data_len)
 808                         continue;
 809
 810                 if (memcmp(reg->match, data, reg->match_len))
 811                         continue;
 812
 813                 /* found match! */
 814
 815                 /* Indicate the received Action frame to user space */
 816                 if (nl80211_send_mgmt(rdev, wdev, reg->nlportid,
 817                                       freq, sig_mbm,
 818                                       buf, len, gfp))
 819                         continue;
 820
 821                 result = true;
 822                 break;
 823         }
 824
 825         spin_unlock_bh(&wdev->mgmt_registrations_lock);
 826
 827         trace_cfg80211_return_bool(result);
 828         return result;
 829 }
 830 EXPORT_SYMBOL(cfg80211_rx_mgmt);
 831
 832 void cfg80211_dfs_channels_update_work(struct work_struct *work)
 833 {
 834         struct delayed_work *delayed_work;
 835         struct cfg80211_registered_device *rdev;
 836         struct cfg80211_chan_def chandef;
 837         struct ieee80211_supported_band *sband;
 838         struct ieee80211_channel *c;
 839         struct wiphy *wiphy;
 840         bool check_again = false;
 841         unsigned long timeout, next_time = 0;
 842         int bandid, i;
 843
 844         delayed_work = container_of(work, struct delayed_work, work);
 845         rdev = container_of(delayed_work, struct cfg80211_registered_device,
 846                             dfs_update_channels_wk);
 847         wiphy = &rdev->wiphy;
 848
 849         mutex_lock(&cfg80211_mutex);
 850         for (bandid = 0; bandid < IEEE80211_NUM_BANDS; bandid++) {
 851                 sband = wiphy->bands[bandid];
 852                 if (!sband)
 853                         continue;
 854
 855                 for (i = 0; i < sband->n_channels; i++) {
 856                         c = &sband->channels[i];
 857
 858                         if (c->dfs_state != NL80211_DFS_UNAVAILABLE)
 859                                 continue;
 860
 861                         timeout = c->dfs_state_entered +
 862                                   IEEE80211_DFS_MIN_NOP_TIME_MS;
 863
 864                         if (time_after_eq(jiffies, timeout)) {
 865                                 c->dfs_state = NL80211_DFS_USABLE;
 866                                 cfg80211_chandef_create(&chandef, c,
 867                                                         NL80211_CHAN_NO_HT);
 868
 869                                 nl80211_radar_notify(rdev, &chandef,
 870                                                      NL80211_RADAR_NOP_FINISHED,
 871                                                      NULL, GFP_ATOMIC);
 872                                 continue;
 873                         }
 874
 875                         if (!check_again)
 876                                 next_time = timeout - jiffies;
 877                         else
 878                                 next_time = min(next_time, timeout - jiffies);
 879                         check_again = true;
 880                 }
 881         }
 882         mutex_unlock(&cfg80211_mutex);
 883
 884         /* reschedule if there are other channels waiting to be cleared again */
 885         if (check_again)
 886                 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
 887                                    next_time);
 888 }
 889
 890
 891 void cfg80211_radar_event(struct wiphy *wiphy,
 892                           struct cfg80211_chan_def *chandef,
 893                           gfp_t gfp)
 894 {
 895         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 896         unsigned long timeout;
 897
 898         trace_cfg80211_radar_event(wiphy, chandef);
 899
 900         /* only set the chandef supplied channel to unavailable, in
 901          * case the radar is detected on only one of multiple channels
 902          * spanned by the chandef.
 903          */
 904         cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
 905
 906         timeout = msecs_to_jiffies(IEEE80211_DFS_MIN_NOP_TIME_MS);
 907         queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
 908                            timeout);
 909
 910         nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
 911 }
 912 EXPORT_SYMBOL(cfg80211_radar_event);
 913
 914 void cfg80211_cac_event(struct net_device *netdev,
 915                         enum nl80211_radar_event event, gfp_t gfp)
 916 {
 917         struct wireless_dev *wdev = netdev->ieee80211_ptr;
 918         struct wiphy *wiphy = wdev->wiphy;
 919         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 920         struct cfg80211_chan_def chandef;
 921         unsigned long timeout;
 922
 923         trace_cfg80211_cac_event(netdev, event);
 924
 925         if (WARN_ON(!wdev->cac_started))
 926                 return;
 927
 928         if (WARN_ON(!wdev->channel))
 929                 return;
 930
 931         cfg80211_chandef_create(&chandef, wdev->channel, NL80211_CHAN_NO_HT);
 932
 933         switch (event) {
 934         case NL80211_RADAR_CAC_FINISHED:
 935                 timeout = wdev->cac_start_time +
 936                           msecs_to_jiffies(IEEE80211_DFS_MIN_CAC_TIME_MS);
 937                 WARN_ON(!time_after_eq(jiffies, timeout));
 938                 cfg80211_set_dfs_state(wiphy, &chandef, NL80211_DFS_AVAILABLE);
 939                 break;
 940         case NL80211_RADAR_CAC_ABORTED:
 941                 break;
 942         default:
 943                 WARN_ON(1);
 944                 return;
 945         }
 946         wdev->cac_started = false;
 947
 948         nl80211_radar_notify(rdev, &chandef, event, netdev, gfp);
 949 }
 950 EXPORT_SYMBOL(cfg80211_cac_event);