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, 2022-2025 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_cap((const u8 *)mle_a) != 344 ieee80211_mle_get_eml_cap((const u8 *)mle_b)) { 345 NL_SET_ERR_MSG(extack, "link EML capabilities mismatch"); 346 return -EINVAL; 347 } 348 349 if (ieee80211_mle_get_mld_capa_op((const u8 *)mle_a) != 350 ieee80211_mle_get_mld_capa_op((const u8 *)mle_b)) { 351 NL_SET_ERR_MSG(extack, "link MLD capabilities/ops mismatch"); 352 return -EINVAL; 353 } 354 355 /* 356 * Only verify the values in Extended MLD Capabilities that are 357 * not reserved when transmitted by an AP (and expected to remain the 358 * same over time). 359 * The Recommended Max Simultaneous Links subfield in particular is 360 * reserved when included in a unicast Probe Response frame and may 361 * also change when the AP adds/removes links. The BTM MLD 362 * Recommendation For Multiple APs Support subfield is reserved when 363 * transmitted by an AP. All other bits are currently reserved. 364 * See IEEE P802.11be/D7.0, Table 9-417o. 365 */ 366 if ((ieee80211_mle_get_ext_mld_capa_op((const u8 *)mle_a) & 367 (IEEE80211_EHT_ML_EXT_MLD_CAPA_OP_PARAM_UPDATE | 368 IEEE80211_EHT_ML_EXT_MLD_CAPA_NSTR_UPDATE | 369 IEEE80211_EHT_ML_EXT_MLD_CAPA_EMLSR_ENA_ON_ONE_LINK)) != 370 (ieee80211_mle_get_ext_mld_capa_op((const u8 *)mle_b) & 371 (IEEE80211_EHT_ML_EXT_MLD_CAPA_OP_PARAM_UPDATE | 372 IEEE80211_EHT_ML_EXT_MLD_CAPA_NSTR_UPDATE | 373 IEEE80211_EHT_ML_EXT_MLD_CAPA_EMLSR_ENA_ON_ONE_LINK))) { 374 NL_SET_ERR_MSG(extack, 375 "extended link MLD capabilities/ops mismatch"); 376 return -EINVAL; 377 } 378 379 return 0; 380 } 381 382 static int cfg80211_mlme_check_mlo(struct net_device *dev, 383 struct cfg80211_assoc_request *req, 384 struct netlink_ext_ack *extack) 385 { 386 const struct ieee80211_multi_link_elem *mles[ARRAY_SIZE(req->links)] = {}; 387 int i; 388 389 if (req->link_id < 0) 390 return 0; 391 392 if (!req->links[req->link_id].bss) { 393 NL_SET_ERR_MSG(extack, "no BSS for assoc link"); 394 return -EINVAL; 395 } 396 397 rcu_read_lock(); 398 for (i = 0; i < ARRAY_SIZE(req->links); i++) { 399 const struct cfg80211_bss_ies *ies; 400 const struct element *ml; 401 402 if (!req->links[i].bss) 403 continue; 404 405 if (ether_addr_equal(req->links[i].bss->bssid, dev->dev_addr)) { 406 NL_SET_ERR_MSG(extack, "BSSID must not be our address"); 407 req->links[i].error = -EINVAL; 408 goto error; 409 } 410 411 ies = rcu_dereference(req->links[i].bss->ies); 412 ml = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 413 ies->data, ies->len); 414 if (!ml) { 415 NL_SET_ERR_MSG(extack, "MLO BSS w/o ML element"); 416 req->links[i].error = -EINVAL; 417 goto error; 418 } 419 420 if (!ieee80211_mle_type_ok(ml->data + 1, 421 IEEE80211_ML_CONTROL_TYPE_BASIC, 422 ml->datalen - 1)) { 423 NL_SET_ERR_MSG(extack, "BSS with invalid ML element"); 424 req->links[i].error = -EINVAL; 425 goto error; 426 } 427 428 mles[i] = (const void *)(ml->data + 1); 429 430 if (ieee80211_mle_get_link_id((const u8 *)mles[i]) != i) { 431 NL_SET_ERR_MSG(extack, "link ID mismatch"); 432 req->links[i].error = -EINVAL; 433 goto error; 434 } 435 } 436 437 if (WARN_ON(!mles[req->link_id])) 438 goto error; 439 440 for (i = 0; i < ARRAY_SIZE(req->links); i++) { 441 if (i == req->link_id || !req->links[i].bss) 442 continue; 443 444 if (WARN_ON(!mles[i])) 445 goto error; 446 447 if (cfg80211_mlme_check_mlo_compat(mles[req->link_id], mles[i], 448 extack)) { 449 req->links[i].error = -EINVAL; 450 goto error; 451 } 452 } 453 454 rcu_read_unlock(); 455 return 0; 456 error: 457 rcu_read_unlock(); 458 return -EINVAL; 459 } 460 461 /* Note: caller must cfg80211_put_bss() regardless of result */ 462 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 463 struct net_device *dev, 464 struct cfg80211_assoc_request *req, 465 struct netlink_ext_ack *extack) 466 { 467 struct wireless_dev *wdev = dev->ieee80211_ptr; 468 int err; 469 470 lockdep_assert_wiphy(wdev->wiphy); 471 472 err = cfg80211_mlme_check_mlo(dev, req, extack); 473 if (err) 474 return err; 475 476 if (wdev->connected && 477 (!req->prev_bssid || 478 !ether_addr_equal(wdev->u.client.connected_addr, req->prev_bssid))) 479 return -EALREADY; 480 481 if ((req->bss && ether_addr_equal(req->bss->bssid, dev->dev_addr)) || 482 (req->link_id >= 0 && 483 ether_addr_equal(req->ap_mld_addr, dev->dev_addr))) 484 return -EINVAL; 485 486 cfg80211_oper_and_ht_capa(&req->ht_capa_mask, 487 rdev->wiphy.ht_capa_mod_mask); 488 cfg80211_oper_and_vht_capa(&req->vht_capa_mask, 489 rdev->wiphy.vht_capa_mod_mask); 490 491 err = rdev_assoc(rdev, dev, req); 492 if (!err) { 493 int link_id; 494 495 if (req->bss) { 496 cfg80211_ref_bss(&rdev->wiphy, req->bss); 497 cfg80211_hold_bss(bss_from_pub(req->bss)); 498 } 499 500 for (link_id = 0; link_id < ARRAY_SIZE(req->links); link_id++) { 501 if (!req->links[link_id].bss) 502 continue; 503 cfg80211_ref_bss(&rdev->wiphy, req->links[link_id].bss); 504 cfg80211_hold_bss(bss_from_pub(req->links[link_id].bss)); 505 } 506 } 507 return err; 508 } 509 510 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 511 struct net_device *dev, const u8 *bssid, 512 const u8 *ie, int ie_len, u16 reason, 513 bool local_state_change) 514 { 515 struct wireless_dev *wdev = dev->ieee80211_ptr; 516 struct cfg80211_deauth_request req = { 517 .bssid = bssid, 518 .reason_code = reason, 519 .ie = ie, 520 .ie_len = ie_len, 521 .local_state_change = local_state_change, 522 }; 523 524 lockdep_assert_wiphy(wdev->wiphy); 525 526 if (local_state_change && 527 (!wdev->connected || 528 !ether_addr_equal(wdev->u.client.connected_addr, bssid))) 529 return 0; 530 531 if (ether_addr_equal(wdev->disconnect_bssid, bssid) || 532 (wdev->connected && 533 ether_addr_equal(wdev->u.client.connected_addr, bssid))) 534 wdev->conn_owner_nlportid = 0; 535 536 return rdev_deauth(rdev, dev, &req); 537 } 538 539 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 540 struct net_device *dev, const u8 *ap_addr, 541 const u8 *ie, int ie_len, u16 reason, 542 bool local_state_change) 543 { 544 struct wireless_dev *wdev = dev->ieee80211_ptr; 545 struct cfg80211_disassoc_request req = { 546 .reason_code = reason, 547 .local_state_change = local_state_change, 548 .ie = ie, 549 .ie_len = ie_len, 550 .ap_addr = ap_addr, 551 }; 552 int err; 553 554 lockdep_assert_wiphy(wdev->wiphy); 555 556 if (!wdev->connected) 557 return -ENOTCONN; 558 559 if (memcmp(wdev->u.client.connected_addr, ap_addr, ETH_ALEN)) 560 return -ENOTCONN; 561 562 err = rdev_disassoc(rdev, dev, &req); 563 if (err) 564 return err; 565 566 /* driver should have reported the disassoc */ 567 WARN_ON(wdev->connected); 568 return 0; 569 } 570 571 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 572 struct net_device *dev) 573 { 574 struct wireless_dev *wdev = dev->ieee80211_ptr; 575 u8 bssid[ETH_ALEN]; 576 577 lockdep_assert_wiphy(wdev->wiphy); 578 579 if (!rdev->ops->deauth) 580 return; 581 582 if (!wdev->connected) 583 return; 584 585 memcpy(bssid, wdev->u.client.connected_addr, ETH_ALEN); 586 cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0, 587 WLAN_REASON_DEAUTH_LEAVING, false); 588 } 589 590 struct cfg80211_mgmt_registration { 591 struct list_head list; 592 struct wireless_dev *wdev; 593 594 u32 nlportid; 595 596 int match_len; 597 598 __le16 frame_type; 599 600 bool multicast_rx; 601 602 u8 match[]; 603 }; 604 605 static void cfg80211_mgmt_registrations_update(struct wireless_dev *wdev) 606 { 607 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 608 struct wireless_dev *tmp; 609 struct cfg80211_mgmt_registration *reg; 610 struct mgmt_frame_regs upd = {}; 611 612 lockdep_assert_held(&rdev->wiphy.mtx); 613 614 spin_lock_bh(&rdev->mgmt_registrations_lock); 615 if (!wdev->mgmt_registrations_need_update) { 616 spin_unlock_bh(&rdev->mgmt_registrations_lock); 617 return; 618 } 619 620 rcu_read_lock(); 621 list_for_each_entry_rcu(tmp, &rdev->wiphy.wdev_list, list) { 622 list_for_each_entry(reg, &tmp->mgmt_registrations, list) { 623 u32 mask = BIT(le16_to_cpu(reg->frame_type) >> 4); 624 u32 mcast_mask = 0; 625 626 if (reg->multicast_rx) 627 mcast_mask = mask; 628 629 upd.global_stypes |= mask; 630 upd.global_mcast_stypes |= mcast_mask; 631 632 if (tmp == wdev) { 633 upd.interface_stypes |= mask; 634 upd.interface_mcast_stypes |= mcast_mask; 635 } 636 } 637 } 638 rcu_read_unlock(); 639 640 wdev->mgmt_registrations_need_update = 0; 641 spin_unlock_bh(&rdev->mgmt_registrations_lock); 642 643 rdev_update_mgmt_frame_registrations(rdev, wdev, &upd); 644 } 645 646 void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk) 647 { 648 struct cfg80211_registered_device *rdev; 649 struct wireless_dev *wdev; 650 651 rdev = container_of(wk, struct cfg80211_registered_device, 652 mgmt_registrations_update_wk); 653 654 guard(wiphy)(&rdev->wiphy); 655 656 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) 657 cfg80211_mgmt_registrations_update(wdev); 658 } 659 660 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid, 661 u16 frame_type, const u8 *match_data, 662 int match_len, bool multicast_rx, 663 struct netlink_ext_ack *extack) 664 { 665 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 666 struct cfg80211_mgmt_registration *reg, *nreg; 667 int err = 0; 668 u16 mgmt_type; 669 bool update_multicast = false; 670 671 if (!wdev->wiphy->mgmt_stypes) 672 return -EOPNOTSUPP; 673 674 if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT) { 675 NL_SET_ERR_MSG(extack, "frame type not management"); 676 return -EINVAL; 677 } 678 679 if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) { 680 NL_SET_ERR_MSG(extack, "Invalid frame type"); 681 return -EINVAL; 682 } 683 684 mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4; 685 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type))) { 686 NL_SET_ERR_MSG(extack, 687 "Registration to specific type not supported"); 688 return -EINVAL; 689 } 690 691 /* 692 * To support Pre Association Security Negotiation (PASN), registration 693 * for authentication frames should be supported. However, as some 694 * versions of the user space daemons wrongly register to all types of 695 * authentication frames (which might result in unexpected behavior) 696 * allow such registration if the request is for a specific 697 * authentication algorithm number. 698 */ 699 if (wdev->iftype == NL80211_IFTYPE_STATION && 700 (frame_type & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_AUTH && 701 !(match_data && match_len >= 2)) { 702 NL_SET_ERR_MSG(extack, 703 "Authentication algorithm number required"); 704 return -EINVAL; 705 } 706 707 nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL); 708 if (!nreg) 709 return -ENOMEM; 710 711 spin_lock_bh(&rdev->mgmt_registrations_lock); 712 713 list_for_each_entry(reg, &wdev->mgmt_registrations, list) { 714 int mlen = min(match_len, reg->match_len); 715 716 if (frame_type != le16_to_cpu(reg->frame_type)) 717 continue; 718 719 if (memcmp(reg->match, match_data, mlen) == 0) { 720 if (reg->multicast_rx != multicast_rx) { 721 update_multicast = true; 722 reg->multicast_rx = multicast_rx; 723 break; 724 } 725 NL_SET_ERR_MSG(extack, "Match already configured"); 726 err = -EALREADY; 727 break; 728 } 729 } 730 731 if (err) 732 goto out; 733 734 if (update_multicast) { 735 kfree(nreg); 736 } else { 737 memcpy(nreg->match, match_data, match_len); 738 nreg->match_len = match_len; 739 nreg->nlportid = snd_portid; 740 nreg->frame_type = cpu_to_le16(frame_type); 741 nreg->wdev = wdev; 742 nreg->multicast_rx = multicast_rx; 743 list_add(&nreg->list, &wdev->mgmt_registrations); 744 } 745 wdev->mgmt_registrations_need_update = 1; 746 spin_unlock_bh(&rdev->mgmt_registrations_lock); 747 748 cfg80211_mgmt_registrations_update(wdev); 749 750 return 0; 751 752 out: 753 kfree(nreg); 754 spin_unlock_bh(&rdev->mgmt_registrations_lock); 755 756 return err; 757 } 758 759 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid) 760 { 761 struct wiphy *wiphy = wdev->wiphy; 762 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 763 struct cfg80211_mgmt_registration *reg, *tmp; 764 765 spin_lock_bh(&rdev->mgmt_registrations_lock); 766 767 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { 768 if (reg->nlportid != nlportid) 769 continue; 770 771 list_del(®->list); 772 kfree(reg); 773 774 wdev->mgmt_registrations_need_update = 1; 775 schedule_work(&rdev->mgmt_registrations_update_wk); 776 } 777 778 spin_unlock_bh(&rdev->mgmt_registrations_lock); 779 780 if (nlportid && rdev->crit_proto_nlportid == nlportid) { 781 rdev->crit_proto_nlportid = 0; 782 rdev_crit_proto_stop(rdev, wdev); 783 } 784 785 if (nlportid == wdev->ap_unexpected_nlportid) 786 wdev->ap_unexpected_nlportid = 0; 787 } 788 789 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev) 790 { 791 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 792 struct cfg80211_mgmt_registration *reg, *tmp; 793 794 spin_lock_bh(&rdev->mgmt_registrations_lock); 795 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { 796 list_del(®->list); 797 kfree(reg); 798 } 799 wdev->mgmt_registrations_need_update = 1; 800 spin_unlock_bh(&rdev->mgmt_registrations_lock); 801 802 cfg80211_mgmt_registrations_update(wdev); 803 } 804 805 static bool cfg80211_allowed_address(struct wireless_dev *wdev, const u8 *addr) 806 { 807 int i; 808 809 for_each_valid_link(wdev, i) { 810 if (ether_addr_equal(addr, wdev->links[i].addr)) 811 return true; 812 } 813 814 return ether_addr_equal(addr, wdev_address(wdev)); 815 } 816 817 static bool cfg80211_allowed_random_address(struct wireless_dev *wdev, 818 const struct ieee80211_mgmt *mgmt) 819 { 820 if (ieee80211_is_auth(mgmt->frame_control) || 821 ieee80211_is_deauth(mgmt->frame_control)) { 822 /* Allow random TA to be used with authentication and 823 * deauthentication frames if the driver has indicated support. 824 */ 825 if (wiphy_ext_feature_isset( 826 wdev->wiphy, 827 NL80211_EXT_FEATURE_AUTH_AND_DEAUTH_RANDOM_TA)) 828 return true; 829 } else if (ieee80211_is_action(mgmt->frame_control) && 830 mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 831 /* Allow random TA to be used with Public Action frames if the 832 * driver has indicated support. 833 */ 834 if (!wdev->connected && 835 wiphy_ext_feature_isset( 836 wdev->wiphy, 837 NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA)) 838 return true; 839 840 if (wdev->connected && 841 wiphy_ext_feature_isset( 842 wdev->wiphy, 843 NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA_CONNECTED)) 844 return true; 845 } 846 847 return false; 848 } 849 850 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 851 struct wireless_dev *wdev, 852 struct cfg80211_mgmt_tx_params *params, u64 *cookie) 853 { 854 const struct ieee80211_mgmt *mgmt; 855 u16 stype; 856 857 lockdep_assert_wiphy(&rdev->wiphy); 858 859 if (!wdev->wiphy->mgmt_stypes) 860 return -EOPNOTSUPP; 861 862 if (!rdev->ops->mgmt_tx) 863 return -EOPNOTSUPP; 864 865 if (params->len < 24 + 1) 866 return -EINVAL; 867 868 mgmt = (const struct ieee80211_mgmt *)params->buf; 869 870 if (!ieee80211_is_mgmt(mgmt->frame_control)) 871 return -EINVAL; 872 873 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; 874 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4))) 875 return -EINVAL; 876 877 if (ieee80211_is_action(mgmt->frame_control) && 878 mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) { 879 int err = 0; 880 881 switch (wdev->iftype) { 882 case NL80211_IFTYPE_ADHOC: 883 /* 884 * check for IBSS DA must be done by driver as 885 * cfg80211 doesn't track the stations 886 */ 887 if (!wdev->u.ibss.current_bss || 888 !ether_addr_equal(wdev->u.ibss.current_bss->pub.bssid, 889 mgmt->bssid)) { 890 err = -ENOTCONN; 891 break; 892 } 893 break; 894 case NL80211_IFTYPE_STATION: 895 case NL80211_IFTYPE_P2P_CLIENT: 896 if (!wdev->connected) { 897 err = -ENOTCONN; 898 break; 899 } 900 901 /* FIXME: MLD may address this differently */ 902 903 if (!ether_addr_equal(wdev->u.client.connected_addr, 904 mgmt->bssid)) { 905 err = -ENOTCONN; 906 break; 907 } 908 909 /* for station, check that DA is the AP */ 910 if (!ether_addr_equal(wdev->u.client.connected_addr, 911 mgmt->da)) { 912 err = -ENOTCONN; 913 break; 914 } 915 break; 916 case NL80211_IFTYPE_AP: 917 case NL80211_IFTYPE_P2P_GO: 918 case NL80211_IFTYPE_AP_VLAN: 919 if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)) && 920 (params->link_id < 0 || 921 !ether_addr_equal(mgmt->bssid, 922 wdev->links[params->link_id].addr))) 923 err = -EINVAL; 924 break; 925 case NL80211_IFTYPE_MESH_POINT: 926 if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) { 927 err = -EINVAL; 928 break; 929 } 930 /* 931 * check for mesh DA must be done by driver as 932 * cfg80211 doesn't track the stations 933 */ 934 break; 935 case NL80211_IFTYPE_P2P_DEVICE: 936 /* 937 * fall through, P2P device only supports 938 * public action frames 939 */ 940 case NL80211_IFTYPE_NAN: 941 default: 942 err = -EOPNOTSUPP; 943 break; 944 } 945 946 if (err) 947 return err; 948 } 949 950 if (!cfg80211_allowed_address(wdev, mgmt->sa) && 951 !cfg80211_allowed_random_address(wdev, mgmt)) 952 return -EINVAL; 953 954 /* Transmit the management frame as requested by user space */ 955 return rdev_mgmt_tx(rdev, wdev, params, cookie); 956 } 957 958 bool cfg80211_rx_mgmt_ext(struct wireless_dev *wdev, 959 struct cfg80211_rx_info *info) 960 { 961 struct wiphy *wiphy = wdev->wiphy; 962 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 963 struct cfg80211_mgmt_registration *reg; 964 const struct ieee80211_txrx_stypes *stypes = 965 &wiphy->mgmt_stypes[wdev->iftype]; 966 struct ieee80211_mgmt *mgmt = (void *)info->buf; 967 const u8 *data; 968 int data_len; 969 bool result = false; 970 __le16 ftype = mgmt->frame_control & 971 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE); 972 u16 stype; 973 974 trace_cfg80211_rx_mgmt(wdev, info); 975 stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4; 976 977 if (!(stypes->rx & BIT(stype))) { 978 trace_cfg80211_return_bool(false); 979 return false; 980 } 981 982 data = info->buf + ieee80211_hdrlen(mgmt->frame_control); 983 data_len = info->len - ieee80211_hdrlen(mgmt->frame_control); 984 985 spin_lock_bh(&rdev->mgmt_registrations_lock); 986 987 list_for_each_entry(reg, &wdev->mgmt_registrations, list) { 988 if (reg->frame_type != ftype) 989 continue; 990 991 if (reg->match_len > data_len) 992 continue; 993 994 if (memcmp(reg->match, data, reg->match_len)) 995 continue; 996 997 /* found match! */ 998 999 /* Indicate the received Action frame to user space */ 1000 if (nl80211_send_mgmt(rdev, wdev, reg->nlportid, info, 1001 GFP_ATOMIC)) 1002 continue; 1003 1004 result = true; 1005 break; 1006 } 1007 1008 spin_unlock_bh(&rdev->mgmt_registrations_lock); 1009 1010 trace_cfg80211_return_bool(result); 1011 return result; 1012 } 1013 EXPORT_SYMBOL(cfg80211_rx_mgmt_ext); 1014 1015 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev) 1016 { 1017 cancel_delayed_work(&rdev->dfs_update_channels_wk); 1018 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, 0); 1019 } 1020 1021 void cfg80211_dfs_channels_update_work(struct work_struct *work) 1022 { 1023 struct delayed_work *delayed_work = to_delayed_work(work); 1024 struct cfg80211_registered_device *rdev; 1025 struct cfg80211_chan_def chandef; 1026 struct ieee80211_supported_band *sband; 1027 struct ieee80211_channel *c; 1028 struct wiphy *wiphy; 1029 bool check_again = false; 1030 unsigned long timeout, next_time = 0; 1031 unsigned long time_dfs_update; 1032 enum nl80211_radar_event radar_event; 1033 int bandid, i; 1034 1035 rdev = container_of(delayed_work, struct cfg80211_registered_device, 1036 dfs_update_channels_wk); 1037 wiphy = &rdev->wiphy; 1038 1039 rtnl_lock(); 1040 for (bandid = 0; bandid < NUM_NL80211_BANDS; bandid++) { 1041 sband = wiphy->bands[bandid]; 1042 if (!sband) 1043 continue; 1044 1045 for (i = 0; i < sband->n_channels; i++) { 1046 c = &sband->channels[i]; 1047 1048 if (!(c->flags & IEEE80211_CHAN_RADAR)) 1049 continue; 1050 1051 if (c->dfs_state != NL80211_DFS_UNAVAILABLE && 1052 c->dfs_state != NL80211_DFS_AVAILABLE) 1053 continue; 1054 1055 if (c->dfs_state == NL80211_DFS_UNAVAILABLE) { 1056 time_dfs_update = IEEE80211_DFS_MIN_NOP_TIME_MS; 1057 radar_event = NL80211_RADAR_NOP_FINISHED; 1058 } else { 1059 if (regulatory_pre_cac_allowed(wiphy) || 1060 cfg80211_any_wiphy_oper_chan(wiphy, c)) 1061 continue; 1062 1063 time_dfs_update = REG_PRE_CAC_EXPIRY_GRACE_MS; 1064 radar_event = NL80211_RADAR_PRE_CAC_EXPIRED; 1065 } 1066 1067 timeout = c->dfs_state_entered + 1068 msecs_to_jiffies(time_dfs_update); 1069 1070 if (time_after_eq(jiffies, timeout)) { 1071 c->dfs_state = NL80211_DFS_USABLE; 1072 c->dfs_state_entered = jiffies; 1073 1074 cfg80211_chandef_create(&chandef, c, 1075 NL80211_CHAN_NO_HT); 1076 1077 nl80211_radar_notify(rdev, &chandef, 1078 radar_event, NULL, 1079 GFP_ATOMIC); 1080 1081 regulatory_propagate_dfs_state(wiphy, &chandef, 1082 c->dfs_state, 1083 radar_event); 1084 continue; 1085 } 1086 1087 if (!check_again) 1088 next_time = timeout - jiffies; 1089 else 1090 next_time = min(next_time, timeout - jiffies); 1091 check_again = true; 1092 } 1093 } 1094 rtnl_unlock(); 1095 1096 /* reschedule if there are other channels waiting to be cleared again */ 1097 if (check_again) 1098 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, 1099 next_time); 1100 } 1101 1102 1103 void __cfg80211_radar_event(struct wiphy *wiphy, 1104 struct cfg80211_chan_def *chandef, 1105 bool offchan, gfp_t gfp) 1106 { 1107 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1108 1109 trace_cfg80211_radar_event(wiphy, chandef, offchan); 1110 1111 /* only set the chandef supplied channel to unavailable, in 1112 * case the radar is detected on only one of multiple channels 1113 * spanned by the chandef. 1114 */ 1115 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE); 1116 1117 if (offchan) 1118 queue_work(cfg80211_wq, &rdev->background_cac_abort_wk); 1119 1120 cfg80211_sched_dfs_chan_update(rdev); 1121 1122 nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp); 1123 1124 memcpy(&rdev->radar_chandef, chandef, sizeof(struct cfg80211_chan_def)); 1125 queue_work(cfg80211_wq, &rdev->propagate_radar_detect_wk); 1126 } 1127 EXPORT_SYMBOL(__cfg80211_radar_event); 1128 1129 void cfg80211_cac_event(struct net_device *netdev, 1130 const struct cfg80211_chan_def *chandef, 1131 enum nl80211_radar_event event, gfp_t gfp, 1132 unsigned int link_id) 1133 { 1134 struct wireless_dev *wdev = netdev->ieee80211_ptr; 1135 struct wiphy *wiphy = wdev->wiphy; 1136 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1137 unsigned long timeout; 1138 1139 if (WARN_ON(wdev->valid_links && 1140 !(wdev->valid_links & BIT(link_id)))) 1141 return; 1142 1143 trace_cfg80211_cac_event(netdev, event, link_id); 1144 1145 if (WARN_ON(!wdev->links[link_id].cac_started && 1146 event != NL80211_RADAR_CAC_STARTED)) 1147 return; 1148 1149 switch (event) { 1150 case NL80211_RADAR_CAC_FINISHED: 1151 timeout = wdev->links[link_id].cac_start_time + 1152 msecs_to_jiffies(wdev->links[link_id].cac_time_ms); 1153 WARN_ON(!time_after_eq(jiffies, timeout)); 1154 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE); 1155 memcpy(&rdev->cac_done_chandef, chandef, 1156 sizeof(struct cfg80211_chan_def)); 1157 queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk); 1158 cfg80211_sched_dfs_chan_update(rdev); 1159 fallthrough; 1160 case NL80211_RADAR_CAC_ABORTED: 1161 wdev->links[link_id].cac_started = false; 1162 break; 1163 case NL80211_RADAR_CAC_STARTED: 1164 wdev->links[link_id].cac_started = true; 1165 break; 1166 default: 1167 WARN_ON(1); 1168 return; 1169 } 1170 1171 nl80211_radar_notify(rdev, chandef, event, netdev, gfp); 1172 } 1173 EXPORT_SYMBOL(cfg80211_cac_event); 1174 1175 static void 1176 __cfg80211_background_cac_event(struct cfg80211_registered_device *rdev, 1177 struct wireless_dev *wdev, 1178 const struct cfg80211_chan_def *chandef, 1179 enum nl80211_radar_event event) 1180 { 1181 struct wiphy *wiphy = &rdev->wiphy; 1182 struct net_device *netdev; 1183 1184 lockdep_assert_wiphy(&rdev->wiphy); 1185 1186 if (!cfg80211_chandef_valid(chandef)) 1187 return; 1188 1189 if (!rdev->background_radar_wdev) 1190 return; 1191 1192 switch (event) { 1193 case NL80211_RADAR_CAC_FINISHED: 1194 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE); 1195 memcpy(&rdev->cac_done_chandef, chandef, sizeof(*chandef)); 1196 queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk); 1197 cfg80211_sched_dfs_chan_update(rdev); 1198 wdev = rdev->background_radar_wdev; 1199 break; 1200 case NL80211_RADAR_CAC_ABORTED: 1201 if (!cancel_delayed_work(&rdev->background_cac_done_wk)) 1202 return; 1203 wdev = rdev->background_radar_wdev; 1204 break; 1205 case NL80211_RADAR_CAC_STARTED: 1206 break; 1207 default: 1208 return; 1209 } 1210 1211 netdev = wdev ? wdev->netdev : NULL; 1212 nl80211_radar_notify(rdev, chandef, event, netdev, GFP_KERNEL); 1213 } 1214 1215 static void 1216 cfg80211_background_cac_event(struct cfg80211_registered_device *rdev, 1217 const struct cfg80211_chan_def *chandef, 1218 enum nl80211_radar_event event) 1219 { 1220 guard(wiphy)(&rdev->wiphy); 1221 1222 __cfg80211_background_cac_event(rdev, rdev->background_radar_wdev, 1223 chandef, event); 1224 } 1225 1226 void cfg80211_background_cac_done_wk(struct work_struct *work) 1227 { 1228 struct delayed_work *delayed_work = to_delayed_work(work); 1229 struct cfg80211_registered_device *rdev; 1230 1231 rdev = container_of(delayed_work, struct cfg80211_registered_device, 1232 background_cac_done_wk); 1233 cfg80211_background_cac_event(rdev, &rdev->background_radar_chandef, 1234 NL80211_RADAR_CAC_FINISHED); 1235 } 1236 1237 void cfg80211_background_cac_abort_wk(struct work_struct *work) 1238 { 1239 struct cfg80211_registered_device *rdev; 1240 1241 rdev = container_of(work, struct cfg80211_registered_device, 1242 background_cac_abort_wk); 1243 cfg80211_background_cac_event(rdev, &rdev->background_radar_chandef, 1244 NL80211_RADAR_CAC_ABORTED); 1245 } 1246 1247 void cfg80211_background_cac_abort(struct wiphy *wiphy) 1248 { 1249 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1250 1251 queue_work(cfg80211_wq, &rdev->background_cac_abort_wk); 1252 } 1253 EXPORT_SYMBOL(cfg80211_background_cac_abort); 1254 1255 int 1256 cfg80211_start_background_radar_detection(struct cfg80211_registered_device *rdev, 1257 struct wireless_dev *wdev, 1258 struct cfg80211_chan_def *chandef) 1259 { 1260 unsigned int cac_time_ms; 1261 int err; 1262 1263 lockdep_assert_wiphy(&rdev->wiphy); 1264 1265 if (!wiphy_ext_feature_isset(&rdev->wiphy, 1266 NL80211_EXT_FEATURE_RADAR_BACKGROUND)) 1267 return -EOPNOTSUPP; 1268 1269 /* Offchannel chain already locked by another wdev */ 1270 if (rdev->background_radar_wdev && rdev->background_radar_wdev != wdev) 1271 return -EBUSY; 1272 1273 /* CAC already in progress on the offchannel chain */ 1274 if (rdev->background_radar_wdev == wdev && 1275 delayed_work_pending(&rdev->background_cac_done_wk)) 1276 return -EBUSY; 1277 1278 err = rdev_set_radar_background(rdev, chandef); 1279 if (err) 1280 return err; 1281 1282 cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, chandef); 1283 if (!cac_time_ms) 1284 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 1285 1286 rdev->background_radar_chandef = *chandef; 1287 rdev->background_radar_wdev = wdev; /* Get offchain ownership */ 1288 1289 __cfg80211_background_cac_event(rdev, wdev, chandef, 1290 NL80211_RADAR_CAC_STARTED); 1291 queue_delayed_work(cfg80211_wq, &rdev->background_cac_done_wk, 1292 msecs_to_jiffies(cac_time_ms)); 1293 1294 return 0; 1295 } 1296 1297 void cfg80211_stop_background_radar_detection(struct wireless_dev *wdev) 1298 { 1299 struct wiphy *wiphy = wdev->wiphy; 1300 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1301 1302 lockdep_assert_wiphy(wiphy); 1303 1304 if (wdev != rdev->background_radar_wdev) 1305 return; 1306 1307 rdev_set_radar_background(rdev, NULL); 1308 rdev->background_radar_wdev = NULL; /* Release offchain ownership */ 1309 1310 __cfg80211_background_cac_event(rdev, wdev, 1311 &rdev->background_radar_chandef, 1312 NL80211_RADAR_CAC_ABORTED); 1313 } 1314 1315 int cfg80211_assoc_ml_reconf(struct cfg80211_registered_device *rdev, 1316 struct net_device *dev, 1317 struct cfg80211_ml_reconf_req *req) 1318 { 1319 struct wireless_dev *wdev = dev->ieee80211_ptr; 1320 int err; 1321 1322 lockdep_assert_wiphy(wdev->wiphy); 1323 1324 err = rdev_assoc_ml_reconf(rdev, dev, req); 1325 if (!err) { 1326 int link_id; 1327 1328 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 1329 link_id++) { 1330 if (!req->add_links[link_id].bss) 1331 continue; 1332 1333 cfg80211_ref_bss(&rdev->wiphy, req->add_links[link_id].bss); 1334 cfg80211_hold_bss(bss_from_pub(req->add_links[link_id].bss)); 1335 } 1336 } 1337 1338 return err; 1339 } 1340 1341 void cfg80211_mlo_reconf_add_done(struct net_device *dev, 1342 struct cfg80211_mlo_reconf_done_data *data) 1343 { 1344 struct wireless_dev *wdev = dev->ieee80211_ptr; 1345 struct wiphy *wiphy = wdev->wiphy; 1346 int link_id; 1347 1348 lockdep_assert_wiphy(wiphy); 1349 1350 trace_cfg80211_mlo_reconf_add_done(dev, data->added_links, 1351 data->buf, data->len, 1352 data->driver_initiated); 1353 1354 if (WARN_ON(!wdev->valid_links)) 1355 return; 1356 1357 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1358 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1359 return; 1360 1361 /* validate that a BSS is given for each added link */ 1362 for (link_id = 0; link_id < ARRAY_SIZE(data->links); link_id++) { 1363 struct cfg80211_bss *bss = data->links[link_id].bss; 1364 1365 if (!(data->added_links & BIT(link_id))) 1366 continue; 1367 1368 if (WARN_ON(!bss)) 1369 return; 1370 } 1371 1372 for (link_id = 0; link_id < ARRAY_SIZE(data->links); link_id++) { 1373 struct cfg80211_bss *bss = data->links[link_id].bss; 1374 1375 if (!bss) 1376 continue; 1377 1378 if (data->added_links & BIT(link_id)) { 1379 wdev->links[link_id].client.current_bss = 1380 bss_from_pub(bss); 1381 1382 if (data->driver_initiated) 1383 cfg80211_hold_bss(bss_from_pub(bss)); 1384 1385 memcpy(wdev->links[link_id].addr, 1386 data->links[link_id].addr, 1387 ETH_ALEN); 1388 } else { 1389 if (!data->driver_initiated) 1390 cfg80211_unhold_bss(bss_from_pub(bss)); 1391 1392 cfg80211_put_bss(wiphy, bss); 1393 } 1394 } 1395 1396 wdev->valid_links |= data->added_links; 1397 nl80211_mlo_reconf_add_done(dev, data); 1398 } 1399 EXPORT_SYMBOL(cfg80211_mlo_reconf_add_done); 1400