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(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(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(&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(&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_unprot_deauth(struct net_device *dev, const u8 *buf, 191 size_t len) 192 { 193 struct wireless_dev *wdev = dev->ieee80211_ptr; 194 struct wiphy *wiphy = wdev->wiphy; 195 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 196 197 trace_cfg80211_send_unprot_deauth(dev); 198 nl80211_send_unprot_deauth(rdev, dev, buf, len, GFP_ATOMIC); 199 } 200 EXPORT_SYMBOL(cfg80211_send_unprot_deauth); 201 202 void cfg80211_send_unprot_disassoc(struct net_device *dev, const u8 *buf, 203 size_t len) 204 { 205 struct wireless_dev *wdev = dev->ieee80211_ptr; 206 struct wiphy *wiphy = wdev->wiphy; 207 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 208 209 trace_cfg80211_send_unprot_disassoc(dev); 210 nl80211_send_unprot_disassoc(rdev, dev, buf, len, GFP_ATOMIC); 211 } 212 EXPORT_SYMBOL(cfg80211_send_unprot_disassoc); 213 214 void cfg80211_send_auth_timeout(struct net_device *dev, const u8 *addr) 215 { 216 struct wireless_dev *wdev = dev->ieee80211_ptr; 217 struct wiphy *wiphy = wdev->wiphy; 218 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 219 220 trace_cfg80211_send_auth_timeout(dev, addr); 221 wdev_lock(wdev); 222 223 nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL); 224 if (wdev->sme_state == CFG80211_SME_CONNECTING) 225 __cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0, 226 WLAN_STATUS_UNSPECIFIED_FAILURE, 227 false, NULL); 228 229 wdev_unlock(wdev); 230 } 231 EXPORT_SYMBOL(cfg80211_send_auth_timeout); 232 233 void cfg80211_send_assoc_timeout(struct net_device *dev, const u8 *addr) 234 { 235 struct wireless_dev *wdev = dev->ieee80211_ptr; 236 struct wiphy *wiphy = wdev->wiphy; 237 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 238 239 trace_cfg80211_send_assoc_timeout(dev, addr); 240 wdev_lock(wdev); 241 242 nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL); 243 if (wdev->sme_state == CFG80211_SME_CONNECTING) 244 __cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0, 245 WLAN_STATUS_UNSPECIFIED_FAILURE, 246 false, NULL); 247 248 wdev_unlock(wdev); 249 } 250 EXPORT_SYMBOL(cfg80211_send_assoc_timeout); 251 252 void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr, 253 enum nl80211_key_type key_type, int key_id, 254 const u8 *tsc, gfp_t gfp) 255 { 256 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; 257 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 258 #ifdef CONFIG_CFG80211_WEXT 259 union iwreq_data wrqu; 260 char *buf = kmalloc(128, gfp); 261 262 if (buf) { 263 sprintf(buf, "MLME-MICHAELMICFAILURE.indication(" 264 "keyid=%d %scast addr=%pM)", key_id, 265 key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni", 266 addr); 267 memset(&wrqu, 0, sizeof(wrqu)); 268 wrqu.data.length = strlen(buf); 269 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); 270 kfree(buf); 271 } 272 #endif 273 274 trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc); 275 nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp); 276 } 277 EXPORT_SYMBOL(cfg80211_michael_mic_failure); 278 279 /* some MLME handling for userspace SME */ 280 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 281 struct net_device *dev, 282 struct ieee80211_channel *chan, 283 enum nl80211_auth_type auth_type, 284 const u8 *bssid, 285 const u8 *ssid, int ssid_len, 286 const u8 *ie, int ie_len, 287 const u8 *key, int key_len, int key_idx, 288 const u8 *sae_data, int sae_data_len) 289 { 290 struct wireless_dev *wdev = dev->ieee80211_ptr; 291 struct cfg80211_auth_request req; 292 int err; 293 294 ASSERT_WDEV_LOCK(wdev); 295 296 if (auth_type == NL80211_AUTHTYPE_SHARED_KEY) 297 if (!key || !key_len || key_idx < 0 || key_idx > 4) 298 return -EINVAL; 299 300 if (wdev->current_bss && 301 ether_addr_equal(bssid, wdev->current_bss->pub.bssid)) 302 return -EALREADY; 303 304 memset(&req, 0, sizeof(req)); 305 306 req.ie = ie; 307 req.ie_len = ie_len; 308 req.sae_data = sae_data; 309 req.sae_data_len = sae_data_len; 310 req.auth_type = auth_type; 311 req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len, 312 WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS); 313 req.key = key; 314 req.key_len = key_len; 315 req.key_idx = key_idx; 316 if (!req.bss) 317 return -ENOENT; 318 319 err = cfg80211_can_use_chan(rdev, wdev, req.bss->channel, 320 CHAN_MODE_SHARED); 321 if (err) 322 goto out; 323 324 err = rdev_auth(rdev, dev, &req); 325 326 out: 327 cfg80211_put_bss(req.bss); 328 return err; 329 } 330 331 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 332 struct net_device *dev, struct ieee80211_channel *chan, 333 enum nl80211_auth_type auth_type, const u8 *bssid, 334 const u8 *ssid, int ssid_len, 335 const u8 *ie, int ie_len, 336 const u8 *key, int key_len, int key_idx, 337 const u8 *sae_data, int sae_data_len) 338 { 339 int err; 340 341 mutex_lock(&rdev->devlist_mtx); 342 wdev_lock(dev->ieee80211_ptr); 343 err = __cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid, 344 ssid, ssid_len, ie, ie_len, 345 key, key_len, key_idx, 346 sae_data, sae_data_len); 347 wdev_unlock(dev->ieee80211_ptr); 348 mutex_unlock(&rdev->devlist_mtx); 349 350 return err; 351 } 352 353 /* Do a logical ht_capa &= ht_capa_mask. */ 354 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 355 const struct ieee80211_ht_cap *ht_capa_mask) 356 { 357 int i; 358 u8 *p1, *p2; 359 if (!ht_capa_mask) { 360 memset(ht_capa, 0, sizeof(*ht_capa)); 361 return; 362 } 363 364 p1 = (u8*)(ht_capa); 365 p2 = (u8*)(ht_capa_mask); 366 for (i = 0; i<sizeof(*ht_capa); i++) 367 p1[i] &= p2[i]; 368 } 369 370 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 371 struct net_device *dev, 372 struct ieee80211_channel *chan, 373 const u8 *bssid, const u8 *prev_bssid, 374 const u8 *ssid, int ssid_len, 375 const u8 *ie, int ie_len, bool use_mfp, 376 struct cfg80211_crypto_settings *crypt, 377 u32 assoc_flags, struct ieee80211_ht_cap *ht_capa, 378 struct ieee80211_ht_cap *ht_capa_mask) 379 { 380 struct wireless_dev *wdev = dev->ieee80211_ptr; 381 struct cfg80211_assoc_request req; 382 int err; 383 bool was_connected = false; 384 385 ASSERT_WDEV_LOCK(wdev); 386 387 memset(&req, 0, sizeof(req)); 388 389 if (wdev->current_bss && prev_bssid && 390 ether_addr_equal(wdev->current_bss->pub.bssid, prev_bssid)) { 391 /* 392 * Trying to reassociate: Allow this to proceed and let the old 393 * association to be dropped when the new one is completed. 394 */ 395 if (wdev->sme_state == CFG80211_SME_CONNECTED) { 396 was_connected = true; 397 wdev->sme_state = CFG80211_SME_CONNECTING; 398 } 399 } else if (wdev->current_bss) 400 return -EALREADY; 401 402 req.ie = ie; 403 req.ie_len = ie_len; 404 memcpy(&req.crypto, crypt, sizeof(req.crypto)); 405 req.use_mfp = use_mfp; 406 req.prev_bssid = prev_bssid; 407 req.flags = assoc_flags; 408 if (ht_capa) 409 memcpy(&req.ht_capa, ht_capa, sizeof(req.ht_capa)); 410 if (ht_capa_mask) 411 memcpy(&req.ht_capa_mask, ht_capa_mask, 412 sizeof(req.ht_capa_mask)); 413 cfg80211_oper_and_ht_capa(&req.ht_capa_mask, 414 rdev->wiphy.ht_capa_mod_mask); 415 416 req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len, 417 WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS); 418 if (!req.bss) { 419 if (was_connected) 420 wdev->sme_state = CFG80211_SME_CONNECTED; 421 return -ENOENT; 422 } 423 424 err = cfg80211_can_use_chan(rdev, wdev, req.bss->channel, 425 CHAN_MODE_SHARED); 426 if (err) 427 goto out; 428 429 err = rdev_assoc(rdev, dev, &req); 430 431 out: 432 if (err) { 433 if (was_connected) 434 wdev->sme_state = CFG80211_SME_CONNECTED; 435 cfg80211_put_bss(req.bss); 436 } 437 438 return err; 439 } 440 441 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 442 struct net_device *dev, 443 struct ieee80211_channel *chan, 444 const u8 *bssid, const u8 *prev_bssid, 445 const u8 *ssid, int ssid_len, 446 const u8 *ie, int ie_len, bool use_mfp, 447 struct cfg80211_crypto_settings *crypt, 448 u32 assoc_flags, struct ieee80211_ht_cap *ht_capa, 449 struct ieee80211_ht_cap *ht_capa_mask) 450 { 451 struct wireless_dev *wdev = dev->ieee80211_ptr; 452 int err; 453 454 mutex_lock(&rdev->devlist_mtx); 455 wdev_lock(wdev); 456 err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid, 457 ssid, ssid_len, ie, ie_len, use_mfp, crypt, 458 assoc_flags, ht_capa, ht_capa_mask); 459 wdev_unlock(wdev); 460 mutex_unlock(&rdev->devlist_mtx); 461 462 return err; 463 } 464 465 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 466 struct net_device *dev, const u8 *bssid, 467 const u8 *ie, int ie_len, u16 reason, 468 bool local_state_change) 469 { 470 struct wireless_dev *wdev = dev->ieee80211_ptr; 471 struct cfg80211_deauth_request req = { 472 .bssid = bssid, 473 .reason_code = reason, 474 .ie = ie, 475 .ie_len = ie_len, 476 .local_state_change = local_state_change, 477 }; 478 479 ASSERT_WDEV_LOCK(wdev); 480 481 if (local_state_change && (!wdev->current_bss || 482 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid))) 483 return 0; 484 485 return rdev_deauth(rdev, dev, &req); 486 } 487 488 int cfg80211_mlme_deauth(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 int err; 495 496 wdev_lock(wdev); 497 err = __cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason, 498 local_state_change); 499 wdev_unlock(wdev); 500 501 return err; 502 } 503 504 static int __cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 505 struct net_device *dev, const u8 *bssid, 506 const u8 *ie, int ie_len, u16 reason, 507 bool local_state_change) 508 { 509 struct wireless_dev *wdev = dev->ieee80211_ptr; 510 struct cfg80211_disassoc_request req; 511 512 ASSERT_WDEV_LOCK(wdev); 513 514 if (wdev->sme_state != CFG80211_SME_CONNECTED) 515 return -ENOTCONN; 516 517 if (WARN_ON(!wdev->current_bss)) 518 return -ENOTCONN; 519 520 memset(&req, 0, sizeof(req)); 521 req.reason_code = reason; 522 req.local_state_change = local_state_change; 523 req.ie = ie; 524 req.ie_len = ie_len; 525 if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) 526 req.bss = &wdev->current_bss->pub; 527 else 528 return -ENOTCONN; 529 530 return rdev_disassoc(rdev, dev, &req); 531 } 532 533 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 534 struct net_device *dev, const u8 *bssid, 535 const u8 *ie, int ie_len, u16 reason, 536 bool local_state_change) 537 { 538 struct wireless_dev *wdev = dev->ieee80211_ptr; 539 int err; 540 541 wdev_lock(wdev); 542 err = __cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason, 543 local_state_change); 544 wdev_unlock(wdev); 545 546 return err; 547 } 548 549 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 550 struct net_device *dev) 551 { 552 struct wireless_dev *wdev = dev->ieee80211_ptr; 553 struct cfg80211_deauth_request req; 554 u8 bssid[ETH_ALEN]; 555 556 ASSERT_WDEV_LOCK(wdev); 557 558 if (!rdev->ops->deauth) 559 return; 560 561 memset(&req, 0, sizeof(req)); 562 req.reason_code = WLAN_REASON_DEAUTH_LEAVING; 563 req.ie = NULL; 564 req.ie_len = 0; 565 566 if (!wdev->current_bss) 567 return; 568 569 memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN); 570 req.bssid = bssid; 571 rdev_deauth(rdev, dev, &req); 572 573 if (wdev->current_bss) { 574 cfg80211_unhold_bss(wdev->current_bss); 575 cfg80211_put_bss(&wdev->current_bss->pub); 576 wdev->current_bss = NULL; 577 } 578 } 579 580 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie, 581 struct ieee80211_channel *chan, 582 unsigned int duration, gfp_t gfp) 583 { 584 struct wiphy *wiphy = wdev->wiphy; 585 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 586 587 trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration); 588 nl80211_send_remain_on_channel(rdev, wdev, cookie, chan, duration, gfp); 589 } 590 EXPORT_SYMBOL(cfg80211_ready_on_channel); 591 592 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie, 593 struct ieee80211_channel *chan, 594 gfp_t gfp) 595 { 596 struct wiphy *wiphy = wdev->wiphy; 597 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 598 599 trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan); 600 nl80211_send_remain_on_channel_cancel(rdev, wdev, cookie, chan, gfp); 601 } 602 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired); 603 604 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr, 605 struct station_info *sinfo, gfp_t gfp) 606 { 607 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; 608 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 609 610 trace_cfg80211_new_sta(dev, mac_addr, sinfo); 611 nl80211_send_sta_event(rdev, dev, mac_addr, sinfo, gfp); 612 } 613 EXPORT_SYMBOL(cfg80211_new_sta); 614 615 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp) 616 { 617 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; 618 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 619 620 trace_cfg80211_del_sta(dev, mac_addr); 621 nl80211_send_sta_del_event(rdev, dev, mac_addr, gfp); 622 } 623 EXPORT_SYMBOL(cfg80211_del_sta); 624 625 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr, 626 enum nl80211_connect_failed_reason reason, 627 gfp_t gfp) 628 { 629 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; 630 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 631 632 nl80211_send_conn_failed_event(rdev, dev, mac_addr, reason, gfp); 633 } 634 EXPORT_SYMBOL(cfg80211_conn_failed); 635 636 struct cfg80211_mgmt_registration { 637 struct list_head list; 638 639 u32 nlportid; 640 641 int match_len; 642 643 __le16 frame_type; 644 645 u8 match[]; 646 }; 647 648 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid, 649 u16 frame_type, const u8 *match_data, 650 int match_len) 651 { 652 struct wiphy *wiphy = wdev->wiphy; 653 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 654 struct cfg80211_mgmt_registration *reg, *nreg; 655 int err = 0; 656 u16 mgmt_type; 657 658 if (!wdev->wiphy->mgmt_stypes) 659 return -EOPNOTSUPP; 660 661 if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT) 662 return -EINVAL; 663 664 if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) 665 return -EINVAL; 666 667 mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4; 668 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type))) 669 return -EINVAL; 670 671 nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL); 672 if (!nreg) 673 return -ENOMEM; 674 675 spin_lock_bh(&wdev->mgmt_registrations_lock); 676 677 list_for_each_entry(reg, &wdev->mgmt_registrations, list) { 678 int mlen = min(match_len, reg->match_len); 679 680 if (frame_type != le16_to_cpu(reg->frame_type)) 681 continue; 682 683 if (memcmp(reg->match, match_data, mlen) == 0) { 684 err = -EALREADY; 685 break; 686 } 687 } 688 689 if (err) { 690 kfree(nreg); 691 goto out; 692 } 693 694 memcpy(nreg->match, match_data, match_len); 695 nreg->match_len = match_len; 696 nreg->nlportid = snd_portid; 697 nreg->frame_type = cpu_to_le16(frame_type); 698 list_add(&nreg->list, &wdev->mgmt_registrations); 699 700 if (rdev->ops->mgmt_frame_register) 701 rdev_mgmt_frame_register(rdev, wdev, frame_type, true); 702 703 out: 704 spin_unlock_bh(&wdev->mgmt_registrations_lock); 705 706 return err; 707 } 708 709 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid) 710 { 711 struct wiphy *wiphy = wdev->wiphy; 712 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 713 struct cfg80211_mgmt_registration *reg, *tmp; 714 715 spin_lock_bh(&wdev->mgmt_registrations_lock); 716 717 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { 718 if (reg->nlportid != nlportid) 719 continue; 720 721 if (rdev->ops->mgmt_frame_register) { 722 u16 frame_type = le16_to_cpu(reg->frame_type); 723 724 rdev_mgmt_frame_register(rdev, wdev, 725 frame_type, false); 726 } 727 728 list_del(®->list); 729 kfree(reg); 730 } 731 732 spin_unlock_bh(&wdev->mgmt_registrations_lock); 733 734 if (nlportid == wdev->ap_unexpected_nlportid) 735 wdev->ap_unexpected_nlportid = 0; 736 } 737 738 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev) 739 { 740 struct cfg80211_mgmt_registration *reg, *tmp; 741 742 spin_lock_bh(&wdev->mgmt_registrations_lock); 743 744 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { 745 list_del(®->list); 746 kfree(reg); 747 } 748 749 spin_unlock_bh(&wdev->mgmt_registrations_lock); 750 } 751 752 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 753 struct wireless_dev *wdev, 754 struct ieee80211_channel *chan, bool offchan, 755 unsigned int wait, const u8 *buf, size_t len, 756 bool no_cck, bool dont_wait_for_ack, u64 *cookie) 757 { 758 const struct ieee80211_mgmt *mgmt; 759 u16 stype; 760 761 if (!wdev->wiphy->mgmt_stypes) 762 return -EOPNOTSUPP; 763 764 if (!rdev->ops->mgmt_tx) 765 return -EOPNOTSUPP; 766 767 if (len < 24 + 1) 768 return -EINVAL; 769 770 mgmt = (const struct ieee80211_mgmt *) buf; 771 772 if (!ieee80211_is_mgmt(mgmt->frame_control)) 773 return -EINVAL; 774 775 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; 776 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4))) 777 return -EINVAL; 778 779 if (ieee80211_is_action(mgmt->frame_control) && 780 mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) { 781 int err = 0; 782 783 wdev_lock(wdev); 784 785 switch (wdev->iftype) { 786 case NL80211_IFTYPE_ADHOC: 787 case NL80211_IFTYPE_STATION: 788 case NL80211_IFTYPE_P2P_CLIENT: 789 if (!wdev->current_bss) { 790 err = -ENOTCONN; 791 break; 792 } 793 794 if (!ether_addr_equal(wdev->current_bss->pub.bssid, 795 mgmt->bssid)) { 796 err = -ENOTCONN; 797 break; 798 } 799 800 /* 801 * check for IBSS DA must be done by driver as 802 * cfg80211 doesn't track the stations 803 */ 804 if (wdev->iftype == NL80211_IFTYPE_ADHOC) 805 break; 806 807 /* for station, check that DA is the AP */ 808 if (!ether_addr_equal(wdev->current_bss->pub.bssid, 809 mgmt->da)) { 810 err = -ENOTCONN; 811 break; 812 } 813 break; 814 case NL80211_IFTYPE_AP: 815 case NL80211_IFTYPE_P2P_GO: 816 case NL80211_IFTYPE_AP_VLAN: 817 if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev))) 818 err = -EINVAL; 819 break; 820 case NL80211_IFTYPE_MESH_POINT: 821 if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) { 822 err = -EINVAL; 823 break; 824 } 825 /* 826 * check for mesh DA must be done by driver as 827 * cfg80211 doesn't track the stations 828 */ 829 break; 830 case NL80211_IFTYPE_P2P_DEVICE: 831 /* 832 * fall through, P2P device only supports 833 * public action frames 834 */ 835 default: 836 err = -EOPNOTSUPP; 837 break; 838 } 839 wdev_unlock(wdev); 840 841 if (err) 842 return err; 843 } 844 845 if (!ether_addr_equal(mgmt->sa, wdev_address(wdev))) 846 return -EINVAL; 847 848 /* Transmit the Action frame as requested by user space */ 849 return rdev_mgmt_tx(rdev, wdev, chan, offchan, 850 wait, buf, len, no_cck, dont_wait_for_ack, 851 cookie); 852 } 853 854 bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm, 855 const u8 *buf, size_t len, gfp_t gfp) 856 { 857 struct wiphy *wiphy = wdev->wiphy; 858 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 859 struct cfg80211_mgmt_registration *reg; 860 const struct ieee80211_txrx_stypes *stypes = 861 &wiphy->mgmt_stypes[wdev->iftype]; 862 struct ieee80211_mgmt *mgmt = (void *)buf; 863 const u8 *data; 864 int data_len; 865 bool result = false; 866 __le16 ftype = mgmt->frame_control & 867 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE); 868 u16 stype; 869 870 trace_cfg80211_rx_mgmt(wdev, freq, sig_mbm); 871 stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4; 872 873 if (!(stypes->rx & BIT(stype))) { 874 trace_cfg80211_return_bool(false); 875 return false; 876 } 877 878 data = buf + ieee80211_hdrlen(mgmt->frame_control); 879 data_len = len - ieee80211_hdrlen(mgmt->frame_control); 880 881 spin_lock_bh(&wdev->mgmt_registrations_lock); 882 883 list_for_each_entry(reg, &wdev->mgmt_registrations, list) { 884 if (reg->frame_type != ftype) 885 continue; 886 887 if (reg->match_len > data_len) 888 continue; 889 890 if (memcmp(reg->match, data, reg->match_len)) 891 continue; 892 893 /* found match! */ 894 895 /* Indicate the received Action frame to user space */ 896 if (nl80211_send_mgmt(rdev, wdev, reg->nlportid, 897 freq, sig_mbm, 898 buf, len, gfp)) 899 continue; 900 901 result = true; 902 break; 903 } 904 905 spin_unlock_bh(&wdev->mgmt_registrations_lock); 906 907 trace_cfg80211_return_bool(result); 908 return result; 909 } 910 EXPORT_SYMBOL(cfg80211_rx_mgmt); 911 912 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie, 913 const u8 *buf, size_t len, bool ack, gfp_t gfp) 914 { 915 struct wiphy *wiphy = wdev->wiphy; 916 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 917 918 trace_cfg80211_mgmt_tx_status(wdev, cookie, ack); 919 920 /* Indicate TX status of the Action frame to user space */ 921 nl80211_send_mgmt_tx_status(rdev, wdev, cookie, buf, len, ack, gfp); 922 } 923 EXPORT_SYMBOL(cfg80211_mgmt_tx_status); 924 925 void cfg80211_cqm_rssi_notify(struct net_device *dev, 926 enum nl80211_cqm_rssi_threshold_event rssi_event, 927 gfp_t gfp) 928 { 929 struct wireless_dev *wdev = dev->ieee80211_ptr; 930 struct wiphy *wiphy = wdev->wiphy; 931 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 932 933 trace_cfg80211_cqm_rssi_notify(dev, rssi_event); 934 935 /* Indicate roaming trigger event to user space */ 936 nl80211_send_cqm_rssi_notify(rdev, dev, rssi_event, gfp); 937 } 938 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify); 939 940 void cfg80211_cqm_pktloss_notify(struct net_device *dev, 941 const u8 *peer, u32 num_packets, gfp_t gfp) 942 { 943 struct wireless_dev *wdev = dev->ieee80211_ptr; 944 struct wiphy *wiphy = wdev->wiphy; 945 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 946 947 trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets); 948 949 /* Indicate roaming trigger event to user space */ 950 nl80211_send_cqm_pktloss_notify(rdev, dev, peer, num_packets, gfp); 951 } 952 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify); 953 954 void cfg80211_cqm_txe_notify(struct net_device *dev, 955 const u8 *peer, u32 num_packets, 956 u32 rate, u32 intvl, 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_send_cqm_txe_notify(rdev, dev, peer, num_packets, 963 rate, intvl, gfp); 964 } 965 EXPORT_SYMBOL(cfg80211_cqm_txe_notify); 966 967 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid, 968 const u8 *replay_ctr, gfp_t gfp) 969 { 970 struct wireless_dev *wdev = dev->ieee80211_ptr; 971 struct wiphy *wiphy = wdev->wiphy; 972 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 973 974 trace_cfg80211_gtk_rekey_notify(dev, bssid); 975 nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp); 976 } 977 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify); 978 979 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index, 980 const u8 *bssid, bool preauth, gfp_t gfp) 981 { 982 struct wireless_dev *wdev = dev->ieee80211_ptr; 983 struct wiphy *wiphy = wdev->wiphy; 984 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 985 986 trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth); 987 nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp); 988 } 989 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify); 990 991 void cfg80211_ch_switch_notify(struct net_device *dev, 992 struct cfg80211_chan_def *chandef) 993 { 994 struct wireless_dev *wdev = dev->ieee80211_ptr; 995 struct wiphy *wiphy = wdev->wiphy; 996 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 997 998 trace_cfg80211_ch_switch_notify(dev, chandef); 999 1000 wdev_lock(wdev); 1001 1002 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP && 1003 wdev->iftype != NL80211_IFTYPE_P2P_GO)) 1004 goto out; 1005 1006 wdev->channel = chandef->chan; 1007 nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL); 1008 out: 1009 wdev_unlock(wdev); 1010 return; 1011 } 1012 EXPORT_SYMBOL(cfg80211_ch_switch_notify); 1013 1014 bool cfg80211_rx_spurious_frame(struct net_device *dev, 1015 const u8 *addr, gfp_t gfp) 1016 { 1017 struct wireless_dev *wdev = dev->ieee80211_ptr; 1018 bool ret; 1019 1020 trace_cfg80211_rx_spurious_frame(dev, addr); 1021 1022 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP && 1023 wdev->iftype != NL80211_IFTYPE_P2P_GO)) { 1024 trace_cfg80211_return_bool(false); 1025 return false; 1026 } 1027 ret = nl80211_unexpected_frame(dev, addr, gfp); 1028 trace_cfg80211_return_bool(ret); 1029 return ret; 1030 } 1031 EXPORT_SYMBOL(cfg80211_rx_spurious_frame); 1032 1033 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev, 1034 const u8 *addr, gfp_t gfp) 1035 { 1036 struct wireless_dev *wdev = dev->ieee80211_ptr; 1037 bool ret; 1038 1039 trace_cfg80211_rx_unexpected_4addr_frame(dev, addr); 1040 1041 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP && 1042 wdev->iftype != NL80211_IFTYPE_P2P_GO && 1043 wdev->iftype != NL80211_IFTYPE_AP_VLAN)) { 1044 trace_cfg80211_return_bool(false); 1045 return false; 1046 } 1047 ret = nl80211_unexpected_4addr_frame(dev, addr, gfp); 1048 trace_cfg80211_return_bool(ret); 1049 return ret; 1050 } 1051 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame); 1052