1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * cfg80211 MLME SAP interface 4 * 5 * Copyright (c) 2009, Jouni Malinen <j@w1.fi> 6 * Copyright (c) 2015 Intel Deutschland GmbH 7 * Copyright (C) 2019-2020, 2022-2024 Intel Corporation 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/etherdevice.h> 13 #include <linux/netdevice.h> 14 #include <linux/nl80211.h> 15 #include <linux/slab.h> 16 #include <linux/wireless.h> 17 #include <net/cfg80211.h> 18 #include <net/iw_handler.h> 19 #include "core.h" 20 #include "nl80211.h" 21 #include "rdev-ops.h" 22 23 24 void cfg80211_rx_assoc_resp(struct net_device *dev, 25 const struct cfg80211_rx_assoc_resp_data *data) 26 { 27 struct wireless_dev *wdev = dev->ieee80211_ptr; 28 struct wiphy *wiphy = wdev->wiphy; 29 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 30 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)data->buf; 31 struct cfg80211_connect_resp_params cr = { 32 .timeout_reason = NL80211_TIMEOUT_UNSPECIFIED, 33 .req_ie = data->req_ies, 34 .req_ie_len = data->req_ies_len, 35 .resp_ie = mgmt->u.assoc_resp.variable, 36 .resp_ie_len = data->len - 37 offsetof(struct ieee80211_mgmt, 38 u.assoc_resp.variable), 39 .status = le16_to_cpu(mgmt->u.assoc_resp.status_code), 40 .ap_mld_addr = data->ap_mld_addr, 41 }; 42 unsigned int link_id; 43 44 for (link_id = 0; link_id < ARRAY_SIZE(data->links); link_id++) { 45 cr.links[link_id].status = data->links[link_id].status; 46 cr.links[link_id].bss = data->links[link_id].bss; 47 48 WARN_ON_ONCE(cr.links[link_id].status != WLAN_STATUS_SUCCESS && 49 (!cr.ap_mld_addr || !cr.links[link_id].bss)); 50 51 if (!cr.links[link_id].bss) 52 continue; 53 cr.links[link_id].bssid = data->links[link_id].bss->bssid; 54 cr.links[link_id].addr = data->links[link_id].addr; 55 /* need to have local link addresses for MLO connections */ 56 WARN_ON(cr.ap_mld_addr && 57 !is_valid_ether_addr(cr.links[link_id].addr)); 58 59 BUG_ON(!cr.links[link_id].bss->channel); 60 61 if (cr.links[link_id].bss->channel->band == NL80211_BAND_S1GHZ) { 62 WARN_ON(link_id); 63 cr.resp_ie = (u8 *)&mgmt->u.s1g_assoc_resp.variable; 64 cr.resp_ie_len = data->len - 65 offsetof(struct ieee80211_mgmt, 66 u.s1g_assoc_resp.variable); 67 } 68 69 if (cr.ap_mld_addr) 70 cr.valid_links |= BIT(link_id); 71 } 72 73 trace_cfg80211_send_rx_assoc(dev, data); 74 75 /* 76 * This is a bit of a hack, we don't notify userspace of 77 * a (re-)association reply if we tried to send a reassoc 78 * and got a reject -- we only try again with an assoc 79 * frame instead of reassoc. 80 */ 81 if (cfg80211_sme_rx_assoc_resp(wdev, cr.status)) { 82 for (link_id = 0; link_id < ARRAY_SIZE(data->links); link_id++) { 83 struct cfg80211_bss *bss = data->links[link_id].bss; 84 85 if (!bss) 86 continue; 87 88 cfg80211_unhold_bss(bss_from_pub(bss)); 89 cfg80211_put_bss(wiphy, bss); 90 } 91 return; 92 } 93 94 nl80211_send_rx_assoc(rdev, dev, data); 95 /* update current_bss etc., consumes the bss reference */ 96 __cfg80211_connect_result(dev, &cr, cr.status == WLAN_STATUS_SUCCESS); 97 } 98 EXPORT_SYMBOL(cfg80211_rx_assoc_resp); 99 100 static void cfg80211_process_auth(struct wireless_dev *wdev, 101 const u8 *buf, size_t len) 102 { 103 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 104 105 nl80211_send_rx_auth(rdev, wdev->netdev, buf, len, GFP_KERNEL); 106 cfg80211_sme_rx_auth(wdev, buf, len); 107 } 108 109 static void cfg80211_process_deauth(struct wireless_dev *wdev, 110 const u8 *buf, size_t len, 111 bool reconnect) 112 { 113 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 114 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 115 const u8 *bssid = mgmt->bssid; 116 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 117 bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr); 118 119 nl80211_send_deauth(rdev, wdev->netdev, buf, len, reconnect, GFP_KERNEL); 120 121 if (!wdev->connected || !ether_addr_equal(wdev->u.client.connected_addr, bssid)) 122 return; 123 124 __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap); 125 cfg80211_sme_deauth(wdev); 126 } 127 128 static void cfg80211_process_disassoc(struct wireless_dev *wdev, 129 const u8 *buf, size_t len, 130 bool reconnect) 131 { 132 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 133 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 134 const u8 *bssid = mgmt->bssid; 135 u16 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 136 bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr); 137 138 nl80211_send_disassoc(rdev, wdev->netdev, buf, len, reconnect, 139 GFP_KERNEL); 140 141 if (WARN_ON(!wdev->connected || 142 !ether_addr_equal(wdev->u.client.connected_addr, bssid))) 143 return; 144 145 __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap); 146 cfg80211_sme_disassoc(wdev); 147 } 148 149 void cfg80211_rx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len) 150 { 151 struct wireless_dev *wdev = dev->ieee80211_ptr; 152 struct ieee80211_mgmt *mgmt = (void *)buf; 153 154 lockdep_assert_wiphy(wdev->wiphy); 155 156 trace_cfg80211_rx_mlme_mgmt(dev, buf, len); 157 158 if (WARN_ON(len < 2)) 159 return; 160 161 if (ieee80211_is_auth(mgmt->frame_control)) 162 cfg80211_process_auth(wdev, buf, len); 163 else if (ieee80211_is_deauth(mgmt->frame_control)) 164 cfg80211_process_deauth(wdev, buf, len, false); 165 else if (ieee80211_is_disassoc(mgmt->frame_control)) 166 cfg80211_process_disassoc(wdev, buf, len, false); 167 } 168 EXPORT_SYMBOL(cfg80211_rx_mlme_mgmt); 169 170 void cfg80211_auth_timeout(struct net_device *dev, const u8 *addr) 171 { 172 struct wireless_dev *wdev = dev->ieee80211_ptr; 173 struct wiphy *wiphy = wdev->wiphy; 174 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 175 176 trace_cfg80211_send_auth_timeout(dev, addr); 177 178 nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL); 179 cfg80211_sme_auth_timeout(wdev); 180 } 181 EXPORT_SYMBOL(cfg80211_auth_timeout); 182 183 void cfg80211_assoc_failure(struct net_device *dev, 184 struct cfg80211_assoc_failure *data) 185 { 186 struct wireless_dev *wdev = dev->ieee80211_ptr; 187 struct wiphy *wiphy = wdev->wiphy; 188 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 189 const u8 *addr = data->ap_mld_addr ?: data->bss[0]->bssid; 190 int i; 191 192 trace_cfg80211_send_assoc_failure(dev, data); 193 194 if (data->timeout) { 195 nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL); 196 cfg80211_sme_assoc_timeout(wdev); 197 } else { 198 cfg80211_sme_abandon_assoc(wdev); 199 } 200 201 for (i = 0; i < ARRAY_SIZE(data->bss); i++) { 202 struct cfg80211_bss *bss = data->bss[i]; 203 204 if (!bss) 205 continue; 206 207 cfg80211_unhold_bss(bss_from_pub(bss)); 208 cfg80211_put_bss(wiphy, bss); 209 } 210 } 211 EXPORT_SYMBOL(cfg80211_assoc_failure); 212 213 void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len, 214 bool reconnect) 215 { 216 struct wireless_dev *wdev = dev->ieee80211_ptr; 217 struct ieee80211_mgmt *mgmt = (void *)buf; 218 219 lockdep_assert_wiphy(wdev->wiphy); 220 221 trace_cfg80211_tx_mlme_mgmt(dev, buf, len, reconnect); 222 223 if (WARN_ON(len < 2)) 224 return; 225 226 if (ieee80211_is_deauth(mgmt->frame_control)) 227 cfg80211_process_deauth(wdev, buf, len, reconnect); 228 else 229 cfg80211_process_disassoc(wdev, buf, len, reconnect); 230 } 231 EXPORT_SYMBOL(cfg80211_tx_mlme_mgmt); 232 233 void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr, 234 enum nl80211_key_type key_type, int key_id, 235 const u8 *tsc, gfp_t gfp) 236 { 237 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; 238 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 239 #ifdef CONFIG_CFG80211_WEXT 240 union iwreq_data wrqu; 241 char *buf = kmalloc(128, gfp); 242 243 if (buf) { 244 memset(&wrqu, 0, sizeof(wrqu)); 245 wrqu.data.length = 246 sprintf(buf, "MLME-MICHAELMICFAILURE." 247 "indication(keyid=%d %scast addr=%pM)", 248 key_id, key_type == NL80211_KEYTYPE_GROUP 249 ? "broad" : "uni", addr); 250 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); 251 kfree(buf); 252 } 253 #endif 254 255 trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc); 256 nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp); 257 } 258 EXPORT_SYMBOL(cfg80211_michael_mic_failure); 259 260 /* some MLME handling for userspace SME */ 261 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 262 struct net_device *dev, 263 struct cfg80211_auth_request *req) 264 { 265 struct wireless_dev *wdev = dev->ieee80211_ptr; 266 267 lockdep_assert_wiphy(wdev->wiphy); 268 269 if (!req->bss) 270 return -ENOENT; 271 272 if (req->link_id >= 0 && 273 !(wdev->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) 274 return -EINVAL; 275 276 if (req->auth_type == NL80211_AUTHTYPE_SHARED_KEY) { 277 if (!req->key || !req->key_len || 278 req->key_idx < 0 || req->key_idx > 3) 279 return -EINVAL; 280 } 281 282 if (wdev->connected && 283 ether_addr_equal(req->bss->bssid, wdev->u.client.connected_addr)) 284 return -EALREADY; 285 286 if (ether_addr_equal(req->bss->bssid, dev->dev_addr) || 287 (req->link_id >= 0 && 288 ether_addr_equal(req->ap_mld_addr, dev->dev_addr))) 289 return -EINVAL; 290 291 return rdev_auth(rdev, dev, req); 292 } 293 294 /* Do a logical ht_capa &= ht_capa_mask. */ 295 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 296 const struct ieee80211_ht_cap *ht_capa_mask) 297 { 298 int i; 299 u8 *p1, *p2; 300 if (!ht_capa_mask) { 301 memset(ht_capa, 0, sizeof(*ht_capa)); 302 return; 303 } 304 305 p1 = (u8*)(ht_capa); 306 p2 = (u8*)(ht_capa_mask); 307 for (i = 0; i < sizeof(*ht_capa); i++) 308 p1[i] &= p2[i]; 309 } 310 311 /* Do a logical vht_capa &= vht_capa_mask. */ 312 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 313 const struct ieee80211_vht_cap *vht_capa_mask) 314 { 315 int i; 316 u8 *p1, *p2; 317 if (!vht_capa_mask) { 318 memset(vht_capa, 0, sizeof(*vht_capa)); 319 return; 320 } 321 322 p1 = (u8*)(vht_capa); 323 p2 = (u8*)(vht_capa_mask); 324 for (i = 0; i < sizeof(*vht_capa); i++) 325 p1[i] &= p2[i]; 326 } 327 328 static int 329 cfg80211_mlme_check_mlo_compat(const struct ieee80211_multi_link_elem *mle_a, 330 const struct ieee80211_multi_link_elem *mle_b, 331 struct netlink_ext_ack *extack) 332 { 333 const struct ieee80211_mle_basic_common_info *common_a, *common_b; 334 335 common_a = (const void *)mle_a->variable; 336 common_b = (const void *)mle_b->variable; 337 338 if (memcmp(common_a->mld_mac_addr, common_b->mld_mac_addr, ETH_ALEN)) { 339 NL_SET_ERR_MSG(extack, "AP MLD address mismatch"); 340 return -EINVAL; 341 } 342 343 if (ieee80211_mle_get_eml_med_sync_delay((const u8 *)mle_a) != 344 ieee80211_mle_get_eml_med_sync_delay((const u8 *)mle_b)) { 345 NL_SET_ERR_MSG(extack, "link EML medium sync delay mismatch"); 346 return -EINVAL; 347 } 348 349 if (ieee80211_mle_get_eml_cap((const u8 *)mle_a) != 350 ieee80211_mle_get_eml_cap((const u8 *)mle_b)) { 351 NL_SET_ERR_MSG(extack, "link EML capabilities mismatch"); 352 return -EINVAL; 353 } 354 355 if (ieee80211_mle_get_mld_capa_op((const u8 *)mle_a) != 356 ieee80211_mle_get_mld_capa_op((const u8 *)mle_b)) { 357 NL_SET_ERR_MSG(extack, "link MLD capabilities/ops mismatch"); 358 return -EINVAL; 359 } 360 361 return 0; 362 } 363 364 static int cfg80211_mlme_check_mlo(struct net_device *dev, 365 struct cfg80211_assoc_request *req, 366 struct netlink_ext_ack *extack) 367 { 368 const struct ieee80211_multi_link_elem *mles[ARRAY_SIZE(req->links)] = {}; 369 int i; 370 371 if (req->link_id < 0) 372 return 0; 373 374 if (!req->links[req->link_id].bss) { 375 NL_SET_ERR_MSG(extack, "no BSS for assoc link"); 376 return -EINVAL; 377 } 378 379 rcu_read_lock(); 380 for (i = 0; i < ARRAY_SIZE(req->links); i++) { 381 const struct cfg80211_bss_ies *ies; 382 const struct element *ml; 383 384 if (!req->links[i].bss) 385 continue; 386 387 if (ether_addr_equal(req->links[i].bss->bssid, dev->dev_addr)) { 388 NL_SET_ERR_MSG(extack, "BSSID must not be our address"); 389 req->links[i].error = -EINVAL; 390 goto error; 391 } 392 393 ies = rcu_dereference(req->links[i].bss->ies); 394 ml = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 395 ies->data, ies->len); 396 if (!ml) { 397 NL_SET_ERR_MSG(extack, "MLO BSS w/o ML element"); 398 req->links[i].error = -EINVAL; 399 goto error; 400 } 401 402 if (!ieee80211_mle_type_ok(ml->data + 1, 403 IEEE80211_ML_CONTROL_TYPE_BASIC, 404 ml->datalen - 1)) { 405 NL_SET_ERR_MSG(extack, "BSS with invalid ML element"); 406 req->links[i].error = -EINVAL; 407 goto error; 408 } 409 410 mles[i] = (const void *)(ml->data + 1); 411 412 if (ieee80211_mle_get_link_id((const u8 *)mles[i]) != i) { 413 NL_SET_ERR_MSG(extack, "link ID mismatch"); 414 req->links[i].error = -EINVAL; 415 goto error; 416 } 417 } 418 419 if (WARN_ON(!mles[req->link_id])) 420 goto error; 421 422 for (i = 0; i < ARRAY_SIZE(req->links); i++) { 423 if (i == req->link_id || !req->links[i].bss) 424 continue; 425 426 if (WARN_ON(!mles[i])) 427 goto error; 428 429 if (cfg80211_mlme_check_mlo_compat(mles[req->link_id], mles[i], 430 extack)) { 431 req->links[i].error = -EINVAL; 432 goto error; 433 } 434 } 435 436 rcu_read_unlock(); 437 return 0; 438 error: 439 rcu_read_unlock(); 440 return -EINVAL; 441 } 442 443 /* Note: caller must cfg80211_put_bss() regardless of result */ 444 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 445 struct net_device *dev, 446 struct cfg80211_assoc_request *req, 447 struct netlink_ext_ack *extack) 448 { 449 struct wireless_dev *wdev = dev->ieee80211_ptr; 450 int err; 451 452 lockdep_assert_wiphy(wdev->wiphy); 453 454 err = cfg80211_mlme_check_mlo(dev, req, extack); 455 if (err) 456 return err; 457 458 if (wdev->connected && 459 (!req->prev_bssid || 460 !ether_addr_equal(wdev->u.client.connected_addr, req->prev_bssid))) 461 return -EALREADY; 462 463 if ((req->bss && ether_addr_equal(req->bss->bssid, dev->dev_addr)) || 464 (req->link_id >= 0 && 465 ether_addr_equal(req->ap_mld_addr, dev->dev_addr))) 466 return -EINVAL; 467 468 cfg80211_oper_and_ht_capa(&req->ht_capa_mask, 469 rdev->wiphy.ht_capa_mod_mask); 470 cfg80211_oper_and_vht_capa(&req->vht_capa_mask, 471 rdev->wiphy.vht_capa_mod_mask); 472 473 err = rdev_assoc(rdev, dev, req); 474 if (!err) { 475 int link_id; 476 477 if (req->bss) { 478 cfg80211_ref_bss(&rdev->wiphy, req->bss); 479 cfg80211_hold_bss(bss_from_pub(req->bss)); 480 } 481 482 for (link_id = 0; link_id < ARRAY_SIZE(req->links); link_id++) { 483 if (!req->links[link_id].bss) 484 continue; 485 cfg80211_ref_bss(&rdev->wiphy, req->links[link_id].bss); 486 cfg80211_hold_bss(bss_from_pub(req->links[link_id].bss)); 487 } 488 } 489 return err; 490 } 491 492 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 493 struct net_device *dev, const u8 *bssid, 494 const u8 *ie, int ie_len, u16 reason, 495 bool local_state_change) 496 { 497 struct wireless_dev *wdev = dev->ieee80211_ptr; 498 struct cfg80211_deauth_request req = { 499 .bssid = bssid, 500 .reason_code = reason, 501 .ie = ie, 502 .ie_len = ie_len, 503 .local_state_change = local_state_change, 504 }; 505 506 lockdep_assert_wiphy(wdev->wiphy); 507 508 if (local_state_change && 509 (!wdev->connected || 510 !ether_addr_equal(wdev->u.client.connected_addr, bssid))) 511 return 0; 512 513 if (ether_addr_equal(wdev->disconnect_bssid, bssid) || 514 (wdev->connected && 515 ether_addr_equal(wdev->u.client.connected_addr, bssid))) 516 wdev->conn_owner_nlportid = 0; 517 518 return rdev_deauth(rdev, dev, &req); 519 } 520 521 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 522 struct net_device *dev, const u8 *ap_addr, 523 const u8 *ie, int ie_len, u16 reason, 524 bool local_state_change) 525 { 526 struct wireless_dev *wdev = dev->ieee80211_ptr; 527 struct cfg80211_disassoc_request req = { 528 .reason_code = reason, 529 .local_state_change = local_state_change, 530 .ie = ie, 531 .ie_len = ie_len, 532 .ap_addr = ap_addr, 533 }; 534 int err; 535 536 lockdep_assert_wiphy(wdev->wiphy); 537 538 if (!wdev->connected) 539 return -ENOTCONN; 540 541 if (memcmp(wdev->u.client.connected_addr, ap_addr, ETH_ALEN)) 542 return -ENOTCONN; 543 544 err = rdev_disassoc(rdev, dev, &req); 545 if (err) 546 return err; 547 548 /* driver should have reported the disassoc */ 549 WARN_ON(wdev->connected); 550 return 0; 551 } 552 553 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 554 struct net_device *dev) 555 { 556 struct wireless_dev *wdev = dev->ieee80211_ptr; 557 u8 bssid[ETH_ALEN]; 558 559 lockdep_assert_wiphy(wdev->wiphy); 560 561 if (!rdev->ops->deauth) 562 return; 563 564 if (!wdev->connected) 565 return; 566 567 memcpy(bssid, wdev->u.client.connected_addr, ETH_ALEN); 568 cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0, 569 WLAN_REASON_DEAUTH_LEAVING, false); 570 } 571 572 struct cfg80211_mgmt_registration { 573 struct list_head list; 574 struct wireless_dev *wdev; 575 576 u32 nlportid; 577 578 int match_len; 579 580 __le16 frame_type; 581 582 bool multicast_rx; 583 584 u8 match[]; 585 }; 586 587 static void cfg80211_mgmt_registrations_update(struct wireless_dev *wdev) 588 { 589 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 590 struct wireless_dev *tmp; 591 struct cfg80211_mgmt_registration *reg; 592 struct mgmt_frame_regs upd = {}; 593 594 lockdep_assert_held(&rdev->wiphy.mtx); 595 596 spin_lock_bh(&rdev->mgmt_registrations_lock); 597 if (!wdev->mgmt_registrations_need_update) { 598 spin_unlock_bh(&rdev->mgmt_registrations_lock); 599 return; 600 } 601 602 rcu_read_lock(); 603 list_for_each_entry_rcu(tmp, &rdev->wiphy.wdev_list, list) { 604 list_for_each_entry(reg, &tmp->mgmt_registrations, list) { 605 u32 mask = BIT(le16_to_cpu(reg->frame_type) >> 4); 606 u32 mcast_mask = 0; 607 608 if (reg->multicast_rx) 609 mcast_mask = mask; 610 611 upd.global_stypes |= mask; 612 upd.global_mcast_stypes |= mcast_mask; 613 614 if (tmp == wdev) { 615 upd.interface_stypes |= mask; 616 upd.interface_mcast_stypes |= mcast_mask; 617 } 618 } 619 } 620 rcu_read_unlock(); 621 622 wdev->mgmt_registrations_need_update = 0; 623 spin_unlock_bh(&rdev->mgmt_registrations_lock); 624 625 rdev_update_mgmt_frame_registrations(rdev, wdev, &upd); 626 } 627 628 void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk) 629 { 630 struct cfg80211_registered_device *rdev; 631 struct wireless_dev *wdev; 632 633 rdev = container_of(wk, struct cfg80211_registered_device, 634 mgmt_registrations_update_wk); 635 636 wiphy_lock(&rdev->wiphy); 637 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) 638 cfg80211_mgmt_registrations_update(wdev); 639 wiphy_unlock(&rdev->wiphy); 640 } 641 642 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid, 643 u16 frame_type, const u8 *match_data, 644 int match_len, bool multicast_rx, 645 struct netlink_ext_ack *extack) 646 { 647 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 648 struct cfg80211_mgmt_registration *reg, *nreg; 649 int err = 0; 650 u16 mgmt_type; 651 bool update_multicast = false; 652 653 if (!wdev->wiphy->mgmt_stypes) 654 return -EOPNOTSUPP; 655 656 if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT) { 657 NL_SET_ERR_MSG(extack, "frame type not management"); 658 return -EINVAL; 659 } 660 661 if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) { 662 NL_SET_ERR_MSG(extack, "Invalid frame type"); 663 return -EINVAL; 664 } 665 666 mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4; 667 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type))) { 668 NL_SET_ERR_MSG(extack, 669 "Registration to specific type not supported"); 670 return -EINVAL; 671 } 672 673 /* 674 * To support Pre Association Security Negotiation (PASN), registration 675 * for authentication frames should be supported. However, as some 676 * versions of the user space daemons wrongly register to all types of 677 * authentication frames (which might result in unexpected behavior) 678 * allow such registration if the request is for a specific 679 * authentication algorithm number. 680 */ 681 if (wdev->iftype == NL80211_IFTYPE_STATION && 682 (frame_type & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_AUTH && 683 !(match_data && match_len >= 2)) { 684 NL_SET_ERR_MSG(extack, 685 "Authentication algorithm number required"); 686 return -EINVAL; 687 } 688 689 nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL); 690 if (!nreg) 691 return -ENOMEM; 692 693 spin_lock_bh(&rdev->mgmt_registrations_lock); 694 695 list_for_each_entry(reg, &wdev->mgmt_registrations, list) { 696 int mlen = min(match_len, reg->match_len); 697 698 if (frame_type != le16_to_cpu(reg->frame_type)) 699 continue; 700 701 if (memcmp(reg->match, match_data, mlen) == 0) { 702 if (reg->multicast_rx != multicast_rx) { 703 update_multicast = true; 704 reg->multicast_rx = multicast_rx; 705 break; 706 } 707 NL_SET_ERR_MSG(extack, "Match already configured"); 708 err = -EALREADY; 709 break; 710 } 711 } 712 713 if (err) 714 goto out; 715 716 if (update_multicast) { 717 kfree(nreg); 718 } else { 719 memcpy(nreg->match, match_data, match_len); 720 nreg->match_len = match_len; 721 nreg->nlportid = snd_portid; 722 nreg->frame_type = cpu_to_le16(frame_type); 723 nreg->wdev = wdev; 724 nreg->multicast_rx = multicast_rx; 725 list_add(&nreg->list, &wdev->mgmt_registrations); 726 } 727 wdev->mgmt_registrations_need_update = 1; 728 spin_unlock_bh(&rdev->mgmt_registrations_lock); 729 730 cfg80211_mgmt_registrations_update(wdev); 731 732 return 0; 733 734 out: 735 kfree(nreg); 736 spin_unlock_bh(&rdev->mgmt_registrations_lock); 737 738 return err; 739 } 740 741 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid) 742 { 743 struct wiphy *wiphy = wdev->wiphy; 744 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 745 struct cfg80211_mgmt_registration *reg, *tmp; 746 747 spin_lock_bh(&rdev->mgmt_registrations_lock); 748 749 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { 750 if (reg->nlportid != nlportid) 751 continue; 752 753 list_del(®->list); 754 kfree(reg); 755 756 wdev->mgmt_registrations_need_update = 1; 757 schedule_work(&rdev->mgmt_registrations_update_wk); 758 } 759 760 spin_unlock_bh(&rdev->mgmt_registrations_lock); 761 762 if (nlportid && rdev->crit_proto_nlportid == nlportid) { 763 rdev->crit_proto_nlportid = 0; 764 rdev_crit_proto_stop(rdev, wdev); 765 } 766 767 if (nlportid == wdev->ap_unexpected_nlportid) 768 wdev->ap_unexpected_nlportid = 0; 769 } 770 771 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev) 772 { 773 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 774 struct cfg80211_mgmt_registration *reg, *tmp; 775 776 spin_lock_bh(&rdev->mgmt_registrations_lock); 777 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { 778 list_del(®->list); 779 kfree(reg); 780 } 781 wdev->mgmt_registrations_need_update = 1; 782 spin_unlock_bh(&rdev->mgmt_registrations_lock); 783 784 cfg80211_mgmt_registrations_update(wdev); 785 } 786 787 static bool cfg80211_allowed_address(struct wireless_dev *wdev, const u8 *addr) 788 { 789 int i; 790 791 for_each_valid_link(wdev, i) { 792 if (ether_addr_equal(addr, wdev->links[i].addr)) 793 return true; 794 } 795 796 return ether_addr_equal(addr, wdev_address(wdev)); 797 } 798 799 static bool cfg80211_allowed_random_address(struct wireless_dev *wdev, 800 const struct ieee80211_mgmt *mgmt) 801 { 802 if (ieee80211_is_auth(mgmt->frame_control) || 803 ieee80211_is_deauth(mgmt->frame_control)) { 804 /* Allow random TA to be used with authentication and 805 * deauthentication frames if the driver has indicated support. 806 */ 807 if (wiphy_ext_feature_isset( 808 wdev->wiphy, 809 NL80211_EXT_FEATURE_AUTH_AND_DEAUTH_RANDOM_TA)) 810 return true; 811 } else if (ieee80211_is_action(mgmt->frame_control) && 812 mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 813 /* Allow random TA to be used with Public Action frames if the 814 * driver has indicated support. 815 */ 816 if (!wdev->connected && 817 wiphy_ext_feature_isset( 818 wdev->wiphy, 819 NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA)) 820 return true; 821 822 if (wdev->connected && 823 wiphy_ext_feature_isset( 824 wdev->wiphy, 825 NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA_CONNECTED)) 826 return true; 827 } 828 829 return false; 830 } 831 832 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 833 struct wireless_dev *wdev, 834 struct cfg80211_mgmt_tx_params *params, u64 *cookie) 835 { 836 const struct ieee80211_mgmt *mgmt; 837 u16 stype; 838 839 lockdep_assert_wiphy(&rdev->wiphy); 840 841 if (!wdev->wiphy->mgmt_stypes) 842 return -EOPNOTSUPP; 843 844 if (!rdev->ops->mgmt_tx) 845 return -EOPNOTSUPP; 846 847 if (params->len < 24 + 1) 848 return -EINVAL; 849 850 mgmt = (const struct ieee80211_mgmt *)params->buf; 851 852 if (!ieee80211_is_mgmt(mgmt->frame_control)) 853 return -EINVAL; 854 855 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; 856 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4))) 857 return -EINVAL; 858 859 if (ieee80211_is_action(mgmt->frame_control) && 860 mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) { 861 int err = 0; 862 863 switch (wdev->iftype) { 864 case NL80211_IFTYPE_ADHOC: 865 /* 866 * check for IBSS DA must be done by driver as 867 * cfg80211 doesn't track the stations 868 */ 869 if (!wdev->u.ibss.current_bss || 870 !ether_addr_equal(wdev->u.ibss.current_bss->pub.bssid, 871 mgmt->bssid)) { 872 err = -ENOTCONN; 873 break; 874 } 875 break; 876 case NL80211_IFTYPE_STATION: 877 case NL80211_IFTYPE_P2P_CLIENT: 878 if (!wdev->connected) { 879 err = -ENOTCONN; 880 break; 881 } 882 883 /* FIXME: MLD may address this differently */ 884 885 if (!ether_addr_equal(wdev->u.client.connected_addr, 886 mgmt->bssid)) { 887 err = -ENOTCONN; 888 break; 889 } 890 891 /* for station, check that DA is the AP */ 892 if (!ether_addr_equal(wdev->u.client.connected_addr, 893 mgmt->da)) { 894 err = -ENOTCONN; 895 break; 896 } 897 break; 898 case NL80211_IFTYPE_AP: 899 case NL80211_IFTYPE_P2P_GO: 900 case NL80211_IFTYPE_AP_VLAN: 901 if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)) && 902 (params->link_id < 0 || 903 !ether_addr_equal(mgmt->bssid, 904 wdev->links[params->link_id].addr))) 905 err = -EINVAL; 906 break; 907 case NL80211_IFTYPE_MESH_POINT: 908 if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) { 909 err = -EINVAL; 910 break; 911 } 912 /* 913 * check for mesh DA must be done by driver as 914 * cfg80211 doesn't track the stations 915 */ 916 break; 917 case NL80211_IFTYPE_P2P_DEVICE: 918 /* 919 * fall through, P2P device only supports 920 * public action frames 921 */ 922 case NL80211_IFTYPE_NAN: 923 default: 924 err = -EOPNOTSUPP; 925 break; 926 } 927 928 if (err) 929 return err; 930 } 931 932 if (!cfg80211_allowed_address(wdev, mgmt->sa) && 933 !cfg80211_allowed_random_address(wdev, mgmt)) 934 return -EINVAL; 935 936 /* Transmit the management frame as requested by user space */ 937 return rdev_mgmt_tx(rdev, wdev, params, cookie); 938 } 939 940 bool cfg80211_rx_mgmt_ext(struct wireless_dev *wdev, 941 struct cfg80211_rx_info *info) 942 { 943 struct wiphy *wiphy = wdev->wiphy; 944 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 945 struct cfg80211_mgmt_registration *reg; 946 const struct ieee80211_txrx_stypes *stypes = 947 &wiphy->mgmt_stypes[wdev->iftype]; 948 struct ieee80211_mgmt *mgmt = (void *)info->buf; 949 const u8 *data; 950 int data_len; 951 bool result = false; 952 __le16 ftype = mgmt->frame_control & 953 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE); 954 u16 stype; 955 956 trace_cfg80211_rx_mgmt(wdev, info); 957 stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4; 958 959 if (!(stypes->rx & BIT(stype))) { 960 trace_cfg80211_return_bool(false); 961 return false; 962 } 963 964 data = info->buf + ieee80211_hdrlen(mgmt->frame_control); 965 data_len = info->len - ieee80211_hdrlen(mgmt->frame_control); 966 967 spin_lock_bh(&rdev->mgmt_registrations_lock); 968 969 list_for_each_entry(reg, &wdev->mgmt_registrations, list) { 970 if (reg->frame_type != ftype) 971 continue; 972 973 if (reg->match_len > data_len) 974 continue; 975 976 if (memcmp(reg->match, data, reg->match_len)) 977 continue; 978 979 /* found match! */ 980 981 /* Indicate the received Action frame to user space */ 982 if (nl80211_send_mgmt(rdev, wdev, reg->nlportid, info, 983 GFP_ATOMIC)) 984 continue; 985 986 result = true; 987 break; 988 } 989 990 spin_unlock_bh(&rdev->mgmt_registrations_lock); 991 992 trace_cfg80211_return_bool(result); 993 return result; 994 } 995 EXPORT_SYMBOL(cfg80211_rx_mgmt_ext); 996 997 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev) 998 { 999 cancel_delayed_work(&rdev->dfs_update_channels_wk); 1000 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, 0); 1001 } 1002 1003 void cfg80211_dfs_channels_update_work(struct work_struct *work) 1004 { 1005 struct delayed_work *delayed_work = to_delayed_work(work); 1006 struct cfg80211_registered_device *rdev; 1007 struct cfg80211_chan_def chandef; 1008 struct ieee80211_supported_band *sband; 1009 struct ieee80211_channel *c; 1010 struct wiphy *wiphy; 1011 bool check_again = false; 1012 unsigned long timeout, next_time = 0; 1013 unsigned long time_dfs_update; 1014 enum nl80211_radar_event radar_event; 1015 int bandid, i; 1016 1017 rdev = container_of(delayed_work, struct cfg80211_registered_device, 1018 dfs_update_channels_wk); 1019 wiphy = &rdev->wiphy; 1020 1021 rtnl_lock(); 1022 for (bandid = 0; bandid < NUM_NL80211_BANDS; bandid++) { 1023 sband = wiphy->bands[bandid]; 1024 if (!sband) 1025 continue; 1026 1027 for (i = 0; i < sband->n_channels; i++) { 1028 c = &sband->channels[i]; 1029 1030 if (!(c->flags & IEEE80211_CHAN_RADAR)) 1031 continue; 1032 1033 if (c->dfs_state != NL80211_DFS_UNAVAILABLE && 1034 c->dfs_state != NL80211_DFS_AVAILABLE) 1035 continue; 1036 1037 if (c->dfs_state == NL80211_DFS_UNAVAILABLE) { 1038 time_dfs_update = IEEE80211_DFS_MIN_NOP_TIME_MS; 1039 radar_event = NL80211_RADAR_NOP_FINISHED; 1040 } else { 1041 if (regulatory_pre_cac_allowed(wiphy) || 1042 cfg80211_any_wiphy_oper_chan(wiphy, c)) 1043 continue; 1044 1045 time_dfs_update = REG_PRE_CAC_EXPIRY_GRACE_MS; 1046 radar_event = NL80211_RADAR_PRE_CAC_EXPIRED; 1047 } 1048 1049 timeout = c->dfs_state_entered + 1050 msecs_to_jiffies(time_dfs_update); 1051 1052 if (time_after_eq(jiffies, timeout)) { 1053 c->dfs_state = NL80211_DFS_USABLE; 1054 c->dfs_state_entered = jiffies; 1055 1056 cfg80211_chandef_create(&chandef, c, 1057 NL80211_CHAN_NO_HT); 1058 1059 nl80211_radar_notify(rdev, &chandef, 1060 radar_event, NULL, 1061 GFP_ATOMIC); 1062 1063 regulatory_propagate_dfs_state(wiphy, &chandef, 1064 c->dfs_state, 1065 radar_event); 1066 continue; 1067 } 1068 1069 if (!check_again) 1070 next_time = timeout - jiffies; 1071 else 1072 next_time = min(next_time, timeout - jiffies); 1073 check_again = true; 1074 } 1075 } 1076 rtnl_unlock(); 1077 1078 /* reschedule if there are other channels waiting to be cleared again */ 1079 if (check_again) 1080 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, 1081 next_time); 1082 } 1083 1084 1085 void __cfg80211_radar_event(struct wiphy *wiphy, 1086 struct cfg80211_chan_def *chandef, 1087 bool offchan, gfp_t gfp) 1088 { 1089 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1090 1091 trace_cfg80211_radar_event(wiphy, chandef, offchan); 1092 1093 /* only set the chandef supplied channel to unavailable, in 1094 * case the radar is detected on only one of multiple channels 1095 * spanned by the chandef. 1096 */ 1097 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE); 1098 1099 if (offchan) 1100 queue_work(cfg80211_wq, &rdev->background_cac_abort_wk); 1101 1102 cfg80211_sched_dfs_chan_update(rdev); 1103 1104 nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp); 1105 1106 memcpy(&rdev->radar_chandef, chandef, sizeof(struct cfg80211_chan_def)); 1107 queue_work(cfg80211_wq, &rdev->propagate_radar_detect_wk); 1108 } 1109 EXPORT_SYMBOL(__cfg80211_radar_event); 1110 1111 void cfg80211_cac_event(struct net_device *netdev, 1112 const struct cfg80211_chan_def *chandef, 1113 enum nl80211_radar_event event, gfp_t gfp, 1114 unsigned int link_id) 1115 { 1116 struct wireless_dev *wdev = netdev->ieee80211_ptr; 1117 struct wiphy *wiphy = wdev->wiphy; 1118 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1119 unsigned long timeout; 1120 1121 if (WARN_ON(wdev->valid_links && 1122 !(wdev->valid_links & BIT(link_id)))) 1123 return; 1124 1125 trace_cfg80211_cac_event(netdev, event, link_id); 1126 1127 if (WARN_ON(!wdev->links[link_id].cac_started && 1128 event != NL80211_RADAR_CAC_STARTED)) 1129 return; 1130 1131 switch (event) { 1132 case NL80211_RADAR_CAC_FINISHED: 1133 timeout = wdev->links[link_id].cac_start_time + 1134 msecs_to_jiffies(wdev->links[link_id].cac_time_ms); 1135 WARN_ON(!time_after_eq(jiffies, timeout)); 1136 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE); 1137 memcpy(&rdev->cac_done_chandef, chandef, 1138 sizeof(struct cfg80211_chan_def)); 1139 queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk); 1140 cfg80211_sched_dfs_chan_update(rdev); 1141 fallthrough; 1142 case NL80211_RADAR_CAC_ABORTED: 1143 wdev->links[link_id].cac_started = false; 1144 break; 1145 case NL80211_RADAR_CAC_STARTED: 1146 wdev->links[link_id].cac_started = true; 1147 break; 1148 default: 1149 WARN_ON(1); 1150 return; 1151 } 1152 1153 nl80211_radar_notify(rdev, chandef, event, netdev, gfp); 1154 } 1155 EXPORT_SYMBOL(cfg80211_cac_event); 1156 1157 static void 1158 __cfg80211_background_cac_event(struct cfg80211_registered_device *rdev, 1159 struct wireless_dev *wdev, 1160 const struct cfg80211_chan_def *chandef, 1161 enum nl80211_radar_event event) 1162 { 1163 struct wiphy *wiphy = &rdev->wiphy; 1164 struct net_device *netdev; 1165 1166 lockdep_assert_wiphy(&rdev->wiphy); 1167 1168 if (!cfg80211_chandef_valid(chandef)) 1169 return; 1170 1171 if (!rdev->background_radar_wdev) 1172 return; 1173 1174 switch (event) { 1175 case NL80211_RADAR_CAC_FINISHED: 1176 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE); 1177 memcpy(&rdev->cac_done_chandef, chandef, sizeof(*chandef)); 1178 queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk); 1179 cfg80211_sched_dfs_chan_update(rdev); 1180 wdev = rdev->background_radar_wdev; 1181 break; 1182 case NL80211_RADAR_CAC_ABORTED: 1183 if (!cancel_delayed_work(&rdev->background_cac_done_wk)) 1184 return; 1185 wdev = rdev->background_radar_wdev; 1186 break; 1187 case NL80211_RADAR_CAC_STARTED: 1188 break; 1189 default: 1190 return; 1191 } 1192 1193 netdev = wdev ? wdev->netdev : NULL; 1194 nl80211_radar_notify(rdev, chandef, event, netdev, GFP_KERNEL); 1195 } 1196 1197 static void 1198 cfg80211_background_cac_event(struct cfg80211_registered_device *rdev, 1199 const struct cfg80211_chan_def *chandef, 1200 enum nl80211_radar_event event) 1201 { 1202 wiphy_lock(&rdev->wiphy); 1203 __cfg80211_background_cac_event(rdev, rdev->background_radar_wdev, 1204 chandef, event); 1205 wiphy_unlock(&rdev->wiphy); 1206 } 1207 1208 void cfg80211_background_cac_done_wk(struct work_struct *work) 1209 { 1210 struct delayed_work *delayed_work = to_delayed_work(work); 1211 struct cfg80211_registered_device *rdev; 1212 1213 rdev = container_of(delayed_work, struct cfg80211_registered_device, 1214 background_cac_done_wk); 1215 cfg80211_background_cac_event(rdev, &rdev->background_radar_chandef, 1216 NL80211_RADAR_CAC_FINISHED); 1217 } 1218 1219 void cfg80211_background_cac_abort_wk(struct work_struct *work) 1220 { 1221 struct cfg80211_registered_device *rdev; 1222 1223 rdev = container_of(work, struct cfg80211_registered_device, 1224 background_cac_abort_wk); 1225 cfg80211_background_cac_event(rdev, &rdev->background_radar_chandef, 1226 NL80211_RADAR_CAC_ABORTED); 1227 } 1228 1229 void cfg80211_background_cac_abort(struct wiphy *wiphy) 1230 { 1231 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1232 1233 queue_work(cfg80211_wq, &rdev->background_cac_abort_wk); 1234 } 1235 EXPORT_SYMBOL(cfg80211_background_cac_abort); 1236 1237 int 1238 cfg80211_start_background_radar_detection(struct cfg80211_registered_device *rdev, 1239 struct wireless_dev *wdev, 1240 struct cfg80211_chan_def *chandef) 1241 { 1242 unsigned int cac_time_ms; 1243 int err; 1244 1245 lockdep_assert_wiphy(&rdev->wiphy); 1246 1247 if (!wiphy_ext_feature_isset(&rdev->wiphy, 1248 NL80211_EXT_FEATURE_RADAR_BACKGROUND)) 1249 return -EOPNOTSUPP; 1250 1251 /* Offchannel chain already locked by another wdev */ 1252 if (rdev->background_radar_wdev && rdev->background_radar_wdev != wdev) 1253 return -EBUSY; 1254 1255 /* CAC already in progress on the offchannel chain */ 1256 if (rdev->background_radar_wdev == wdev && 1257 delayed_work_pending(&rdev->background_cac_done_wk)) 1258 return -EBUSY; 1259 1260 err = rdev_set_radar_background(rdev, chandef); 1261 if (err) 1262 return err; 1263 1264 cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, chandef); 1265 if (!cac_time_ms) 1266 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 1267 1268 rdev->background_radar_chandef = *chandef; 1269 rdev->background_radar_wdev = wdev; /* Get offchain ownership */ 1270 1271 __cfg80211_background_cac_event(rdev, wdev, chandef, 1272 NL80211_RADAR_CAC_STARTED); 1273 queue_delayed_work(cfg80211_wq, &rdev->background_cac_done_wk, 1274 msecs_to_jiffies(cac_time_ms)); 1275 1276 return 0; 1277 } 1278 1279 void cfg80211_stop_background_radar_detection(struct wireless_dev *wdev) 1280 { 1281 struct wiphy *wiphy = wdev->wiphy; 1282 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1283 1284 lockdep_assert_wiphy(wiphy); 1285 1286 if (wdev != rdev->background_radar_wdev) 1287 return; 1288 1289 rdev_set_radar_background(rdev, NULL); 1290 rdev->background_radar_wdev = NULL; /* Release offchain ownership */ 1291 1292 __cfg80211_background_cac_event(rdev, wdev, 1293 &rdev->background_radar_chandef, 1294 NL80211_RADAR_CAC_ABORTED); 1295 } 1296