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 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, struct cfg80211_bss *bss, 25 const u8 *buf, size_t len, int uapsd_queues, 26 const u8 *req_ies, size_t req_ies_len) 27 { 28 struct wireless_dev *wdev = dev->ieee80211_ptr; 29 struct wiphy *wiphy = wdev->wiphy; 30 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 31 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 32 struct cfg80211_connect_resp_params cr; 33 const u8 *resp_ie = mgmt->u.assoc_resp.variable; 34 size_t resp_ie_len = len - offsetof(struct ieee80211_mgmt, 35 u.assoc_resp.variable); 36 37 if (bss->channel->band == NL80211_BAND_S1GHZ) { 38 resp_ie = (u8 *)&mgmt->u.s1g_assoc_resp.variable; 39 resp_ie_len = len - offsetof(struct ieee80211_mgmt, 40 u.s1g_assoc_resp.variable); 41 } 42 43 memset(&cr, 0, sizeof(cr)); 44 cr.status = (int)le16_to_cpu(mgmt->u.assoc_resp.status_code); 45 cr.bssid = mgmt->bssid; 46 cr.bss = bss; 47 cr.req_ie = req_ies; 48 cr.req_ie_len = req_ies_len; 49 cr.resp_ie = resp_ie; 50 cr.resp_ie_len = resp_ie_len; 51 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED; 52 53 trace_cfg80211_send_rx_assoc(dev, bss); 54 55 /* 56 * This is a bit of a hack, we don't notify userspace of 57 * a (re-)association reply if we tried to send a reassoc 58 * and got a reject -- we only try again with an assoc 59 * frame instead of reassoc. 60 */ 61 if (cfg80211_sme_rx_assoc_resp(wdev, cr.status)) { 62 cfg80211_unhold_bss(bss_from_pub(bss)); 63 cfg80211_put_bss(wiphy, bss); 64 return; 65 } 66 67 nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL, uapsd_queues, 68 req_ies, req_ies_len); 69 /* update current_bss etc., consumes the bss reference */ 70 __cfg80211_connect_result(dev, &cr, cr.status == WLAN_STATUS_SUCCESS); 71 } 72 EXPORT_SYMBOL(cfg80211_rx_assoc_resp); 73 74 static void cfg80211_process_auth(struct wireless_dev *wdev, 75 const u8 *buf, size_t len) 76 { 77 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 78 79 nl80211_send_rx_auth(rdev, wdev->netdev, buf, len, GFP_KERNEL); 80 cfg80211_sme_rx_auth(wdev, buf, len); 81 } 82 83 static void cfg80211_process_deauth(struct wireless_dev *wdev, 84 const u8 *buf, size_t len, 85 bool reconnect) 86 { 87 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 88 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 89 const u8 *bssid = mgmt->bssid; 90 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 91 bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr); 92 93 nl80211_send_deauth(rdev, wdev->netdev, buf, len, reconnect, GFP_KERNEL); 94 95 if (!wdev->current_bss || 96 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) 97 return; 98 99 __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap); 100 cfg80211_sme_deauth(wdev); 101 } 102 103 static void cfg80211_process_disassoc(struct wireless_dev *wdev, 104 const u8 *buf, size_t len, 105 bool reconnect) 106 { 107 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 108 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 109 const u8 *bssid = mgmt->bssid; 110 u16 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 111 bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr); 112 113 nl80211_send_disassoc(rdev, wdev->netdev, buf, len, reconnect, 114 GFP_KERNEL); 115 116 if (WARN_ON(!wdev->current_bss || 117 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid))) 118 return; 119 120 __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap); 121 cfg80211_sme_disassoc(wdev); 122 } 123 124 void cfg80211_rx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len) 125 { 126 struct wireless_dev *wdev = dev->ieee80211_ptr; 127 struct ieee80211_mgmt *mgmt = (void *)buf; 128 129 ASSERT_WDEV_LOCK(wdev); 130 131 trace_cfg80211_rx_mlme_mgmt(dev, buf, len); 132 133 if (WARN_ON(len < 2)) 134 return; 135 136 if (ieee80211_is_auth(mgmt->frame_control)) 137 cfg80211_process_auth(wdev, buf, len); 138 else if (ieee80211_is_deauth(mgmt->frame_control)) 139 cfg80211_process_deauth(wdev, buf, len, false); 140 else if (ieee80211_is_disassoc(mgmt->frame_control)) 141 cfg80211_process_disassoc(wdev, buf, len, false); 142 } 143 EXPORT_SYMBOL(cfg80211_rx_mlme_mgmt); 144 145 void cfg80211_auth_timeout(struct net_device *dev, const u8 *addr) 146 { 147 struct wireless_dev *wdev = dev->ieee80211_ptr; 148 struct wiphy *wiphy = wdev->wiphy; 149 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 150 151 trace_cfg80211_send_auth_timeout(dev, addr); 152 153 nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL); 154 cfg80211_sme_auth_timeout(wdev); 155 } 156 EXPORT_SYMBOL(cfg80211_auth_timeout); 157 158 void cfg80211_assoc_timeout(struct net_device *dev, struct cfg80211_bss *bss) 159 { 160 struct wireless_dev *wdev = dev->ieee80211_ptr; 161 struct wiphy *wiphy = wdev->wiphy; 162 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 163 164 trace_cfg80211_send_assoc_timeout(dev, bss->bssid); 165 166 nl80211_send_assoc_timeout(rdev, dev, bss->bssid, GFP_KERNEL); 167 cfg80211_sme_assoc_timeout(wdev); 168 169 cfg80211_unhold_bss(bss_from_pub(bss)); 170 cfg80211_put_bss(wiphy, bss); 171 } 172 EXPORT_SYMBOL(cfg80211_assoc_timeout); 173 174 void cfg80211_abandon_assoc(struct net_device *dev, struct cfg80211_bss *bss) 175 { 176 struct wireless_dev *wdev = dev->ieee80211_ptr; 177 struct wiphy *wiphy = wdev->wiphy; 178 179 cfg80211_sme_abandon_assoc(wdev); 180 181 cfg80211_unhold_bss(bss_from_pub(bss)); 182 cfg80211_put_bss(wiphy, bss); 183 } 184 EXPORT_SYMBOL(cfg80211_abandon_assoc); 185 186 void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len, 187 bool reconnect) 188 { 189 struct wireless_dev *wdev = dev->ieee80211_ptr; 190 struct ieee80211_mgmt *mgmt = (void *)buf; 191 192 ASSERT_WDEV_LOCK(wdev); 193 194 trace_cfg80211_tx_mlme_mgmt(dev, buf, len, reconnect); 195 196 if (WARN_ON(len < 2)) 197 return; 198 199 if (ieee80211_is_deauth(mgmt->frame_control)) 200 cfg80211_process_deauth(wdev, buf, len, reconnect); 201 else 202 cfg80211_process_disassoc(wdev, buf, len, reconnect); 203 } 204 EXPORT_SYMBOL(cfg80211_tx_mlme_mgmt); 205 206 void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr, 207 enum nl80211_key_type key_type, int key_id, 208 const u8 *tsc, gfp_t gfp) 209 { 210 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; 211 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 212 #ifdef CONFIG_CFG80211_WEXT 213 union iwreq_data wrqu; 214 char *buf = kmalloc(128, gfp); 215 216 if (buf) { 217 sprintf(buf, "MLME-MICHAELMICFAILURE.indication(" 218 "keyid=%d %scast addr=%pM)", key_id, 219 key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni", 220 addr); 221 memset(&wrqu, 0, sizeof(wrqu)); 222 wrqu.data.length = strlen(buf); 223 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); 224 kfree(buf); 225 } 226 #endif 227 228 trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc); 229 nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp); 230 } 231 EXPORT_SYMBOL(cfg80211_michael_mic_failure); 232 233 /* some MLME handling for userspace SME */ 234 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 235 struct net_device *dev, 236 struct ieee80211_channel *chan, 237 enum nl80211_auth_type auth_type, 238 const u8 *bssid, 239 const u8 *ssid, int ssid_len, 240 const u8 *ie, int ie_len, 241 const u8 *key, int key_len, int key_idx, 242 const u8 *auth_data, int auth_data_len) 243 { 244 struct wireless_dev *wdev = dev->ieee80211_ptr; 245 struct cfg80211_auth_request req = { 246 .ie = ie, 247 .ie_len = ie_len, 248 .auth_data = auth_data, 249 .auth_data_len = auth_data_len, 250 .auth_type = auth_type, 251 .key = key, 252 .key_len = key_len, 253 .key_idx = key_idx, 254 }; 255 int err; 256 257 ASSERT_WDEV_LOCK(wdev); 258 259 if (auth_type == NL80211_AUTHTYPE_SHARED_KEY) 260 if (!key || !key_len || key_idx < 0 || key_idx > 3) 261 return -EINVAL; 262 263 if (wdev->current_bss && 264 ether_addr_equal(bssid, wdev->current_bss->pub.bssid)) 265 return -EALREADY; 266 267 req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len, 268 IEEE80211_BSS_TYPE_ESS, 269 IEEE80211_PRIVACY_ANY); 270 if (!req.bss) 271 return -ENOENT; 272 273 err = rdev_auth(rdev, dev, &req); 274 275 cfg80211_put_bss(&rdev->wiphy, req.bss); 276 return err; 277 } 278 279 /* Do a logical ht_capa &= ht_capa_mask. */ 280 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 281 const struct ieee80211_ht_cap *ht_capa_mask) 282 { 283 int i; 284 u8 *p1, *p2; 285 if (!ht_capa_mask) { 286 memset(ht_capa, 0, sizeof(*ht_capa)); 287 return; 288 } 289 290 p1 = (u8*)(ht_capa); 291 p2 = (u8*)(ht_capa_mask); 292 for (i = 0; i < sizeof(*ht_capa); i++) 293 p1[i] &= p2[i]; 294 } 295 296 /* Do a logical vht_capa &= vht_capa_mask. */ 297 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 298 const struct ieee80211_vht_cap *vht_capa_mask) 299 { 300 int i; 301 u8 *p1, *p2; 302 if (!vht_capa_mask) { 303 memset(vht_capa, 0, sizeof(*vht_capa)); 304 return; 305 } 306 307 p1 = (u8*)(vht_capa); 308 p2 = (u8*)(vht_capa_mask); 309 for (i = 0; i < sizeof(*vht_capa); i++) 310 p1[i] &= p2[i]; 311 } 312 313 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 314 struct net_device *dev, 315 struct ieee80211_channel *chan, 316 const u8 *bssid, 317 const u8 *ssid, int ssid_len, 318 struct cfg80211_assoc_request *req) 319 { 320 struct wireless_dev *wdev = dev->ieee80211_ptr; 321 int err; 322 323 ASSERT_WDEV_LOCK(wdev); 324 325 if (wdev->current_bss && 326 (!req->prev_bssid || !ether_addr_equal(wdev->current_bss->pub.bssid, 327 req->prev_bssid))) 328 return -EALREADY; 329 330 cfg80211_oper_and_ht_capa(&req->ht_capa_mask, 331 rdev->wiphy.ht_capa_mod_mask); 332 cfg80211_oper_and_vht_capa(&req->vht_capa_mask, 333 rdev->wiphy.vht_capa_mod_mask); 334 335 req->bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len, 336 IEEE80211_BSS_TYPE_ESS, 337 IEEE80211_PRIVACY_ANY); 338 if (!req->bss) 339 return -ENOENT; 340 341 err = rdev_assoc(rdev, dev, req); 342 if (!err) 343 cfg80211_hold_bss(bss_from_pub(req->bss)); 344 else 345 cfg80211_put_bss(&rdev->wiphy, req->bss); 346 347 return err; 348 } 349 350 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 351 struct net_device *dev, const u8 *bssid, 352 const u8 *ie, int ie_len, u16 reason, 353 bool local_state_change) 354 { 355 struct wireless_dev *wdev = dev->ieee80211_ptr; 356 struct cfg80211_deauth_request req = { 357 .bssid = bssid, 358 .reason_code = reason, 359 .ie = ie, 360 .ie_len = ie_len, 361 .local_state_change = local_state_change, 362 }; 363 364 ASSERT_WDEV_LOCK(wdev); 365 366 if (local_state_change && 367 (!wdev->current_bss || 368 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid))) 369 return 0; 370 371 if (ether_addr_equal(wdev->disconnect_bssid, bssid) || 372 (wdev->current_bss && 373 ether_addr_equal(wdev->current_bss->pub.bssid, bssid))) 374 wdev->conn_owner_nlportid = 0; 375 376 return rdev_deauth(rdev, dev, &req); 377 } 378 379 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 380 struct net_device *dev, const u8 *bssid, 381 const u8 *ie, int ie_len, u16 reason, 382 bool local_state_change) 383 { 384 struct wireless_dev *wdev = dev->ieee80211_ptr; 385 struct cfg80211_disassoc_request req = { 386 .reason_code = reason, 387 .local_state_change = local_state_change, 388 .ie = ie, 389 .ie_len = ie_len, 390 }; 391 int err; 392 393 ASSERT_WDEV_LOCK(wdev); 394 395 if (!wdev->current_bss) 396 return -ENOTCONN; 397 398 if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) 399 req.bss = &wdev->current_bss->pub; 400 else 401 return -ENOTCONN; 402 403 err = rdev_disassoc(rdev, dev, &req); 404 if (err) 405 return err; 406 407 /* driver should have reported the disassoc */ 408 WARN_ON(wdev->current_bss); 409 return 0; 410 } 411 412 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 413 struct net_device *dev) 414 { 415 struct wireless_dev *wdev = dev->ieee80211_ptr; 416 u8 bssid[ETH_ALEN]; 417 418 ASSERT_WDEV_LOCK(wdev); 419 420 if (!rdev->ops->deauth) 421 return; 422 423 if (!wdev->current_bss) 424 return; 425 426 memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN); 427 cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0, 428 WLAN_REASON_DEAUTH_LEAVING, false); 429 } 430 431 struct cfg80211_mgmt_registration { 432 struct list_head list; 433 struct wireless_dev *wdev; 434 435 u32 nlportid; 436 437 int match_len; 438 439 __le16 frame_type; 440 441 bool multicast_rx; 442 443 u8 match[]; 444 }; 445 446 static void cfg80211_mgmt_registrations_update(struct wireless_dev *wdev) 447 { 448 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 449 struct wireless_dev *tmp; 450 struct cfg80211_mgmt_registration *reg; 451 struct mgmt_frame_regs upd = {}; 452 453 ASSERT_RTNL(); 454 455 spin_lock_bh(&wdev->mgmt_registrations_lock); 456 if (!wdev->mgmt_registrations_need_update) { 457 spin_unlock_bh(&wdev->mgmt_registrations_lock); 458 return; 459 } 460 461 rcu_read_lock(); 462 list_for_each_entry_rcu(tmp, &rdev->wiphy.wdev_list, list) { 463 list_for_each_entry(reg, &tmp->mgmt_registrations, list) { 464 u32 mask = BIT(le16_to_cpu(reg->frame_type) >> 4); 465 u32 mcast_mask = 0; 466 467 if (reg->multicast_rx) 468 mcast_mask = mask; 469 470 upd.global_stypes |= mask; 471 upd.global_mcast_stypes |= mcast_mask; 472 473 if (tmp == wdev) { 474 upd.interface_stypes |= mask; 475 upd.interface_mcast_stypes |= mcast_mask; 476 } 477 } 478 } 479 rcu_read_unlock(); 480 481 wdev->mgmt_registrations_need_update = 0; 482 spin_unlock_bh(&wdev->mgmt_registrations_lock); 483 484 rdev_update_mgmt_frame_registrations(rdev, wdev, &upd); 485 } 486 487 void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk) 488 { 489 struct cfg80211_registered_device *rdev; 490 struct wireless_dev *wdev; 491 492 rdev = container_of(wk, struct cfg80211_registered_device, 493 mgmt_registrations_update_wk); 494 495 rtnl_lock(); 496 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) 497 cfg80211_mgmt_registrations_update(wdev); 498 rtnl_unlock(); 499 } 500 501 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid, 502 u16 frame_type, const u8 *match_data, 503 int match_len, bool multicast_rx, 504 struct netlink_ext_ack *extack) 505 { 506 struct cfg80211_mgmt_registration *reg, *nreg; 507 int err = 0; 508 u16 mgmt_type; 509 bool update_multicast = false; 510 511 if (!wdev->wiphy->mgmt_stypes) 512 return -EOPNOTSUPP; 513 514 if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT) { 515 NL_SET_ERR_MSG(extack, "frame type not management"); 516 return -EINVAL; 517 } 518 519 if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) { 520 NL_SET_ERR_MSG(extack, "Invalid frame type"); 521 return -EINVAL; 522 } 523 524 mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4; 525 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type))) { 526 NL_SET_ERR_MSG(extack, 527 "Registration to specific type not supported"); 528 return -EINVAL; 529 } 530 531 /* 532 * To support Pre Association Security Negotiation (PASN), registration 533 * for authentication frames should be supported. However, as some 534 * versions of the user space daemons wrongly register to all types of 535 * authentication frames (which might result in unexpected behavior) 536 * allow such registration if the request is for a specific 537 * authentication algorithm number. 538 */ 539 if (wdev->iftype == NL80211_IFTYPE_STATION && 540 (frame_type & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_AUTH && 541 !(match_data && match_len >= 2)) { 542 NL_SET_ERR_MSG(extack, 543 "Authentication algorithm number required"); 544 return -EINVAL; 545 } 546 547 nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL); 548 if (!nreg) 549 return -ENOMEM; 550 551 spin_lock_bh(&wdev->mgmt_registrations_lock); 552 553 list_for_each_entry(reg, &wdev->mgmt_registrations, list) { 554 int mlen = min(match_len, reg->match_len); 555 556 if (frame_type != le16_to_cpu(reg->frame_type)) 557 continue; 558 559 if (memcmp(reg->match, match_data, mlen) == 0) { 560 if (reg->multicast_rx != multicast_rx) { 561 update_multicast = true; 562 reg->multicast_rx = multicast_rx; 563 break; 564 } 565 NL_SET_ERR_MSG(extack, "Match already configured"); 566 err = -EALREADY; 567 break; 568 } 569 } 570 571 if (err) 572 goto out; 573 574 if (update_multicast) { 575 kfree(nreg); 576 } else { 577 memcpy(nreg->match, match_data, match_len); 578 nreg->match_len = match_len; 579 nreg->nlportid = snd_portid; 580 nreg->frame_type = cpu_to_le16(frame_type); 581 nreg->wdev = wdev; 582 nreg->multicast_rx = multicast_rx; 583 list_add(&nreg->list, &wdev->mgmt_registrations); 584 } 585 wdev->mgmt_registrations_need_update = 1; 586 spin_unlock_bh(&wdev->mgmt_registrations_lock); 587 588 cfg80211_mgmt_registrations_update(wdev); 589 590 return 0; 591 592 out: 593 kfree(nreg); 594 spin_unlock_bh(&wdev->mgmt_registrations_lock); 595 596 return err; 597 } 598 599 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid) 600 { 601 struct wiphy *wiphy = wdev->wiphy; 602 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 603 struct cfg80211_mgmt_registration *reg, *tmp; 604 605 spin_lock_bh(&wdev->mgmt_registrations_lock); 606 607 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { 608 if (reg->nlportid != nlportid) 609 continue; 610 611 list_del(®->list); 612 kfree(reg); 613 614 wdev->mgmt_registrations_need_update = 1; 615 schedule_work(&rdev->mgmt_registrations_update_wk); 616 } 617 618 spin_unlock_bh(&wdev->mgmt_registrations_lock); 619 620 if (nlportid && rdev->crit_proto_nlportid == nlportid) { 621 rdev->crit_proto_nlportid = 0; 622 rdev_crit_proto_stop(rdev, wdev); 623 } 624 625 if (nlportid == wdev->ap_unexpected_nlportid) 626 wdev->ap_unexpected_nlportid = 0; 627 } 628 629 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev) 630 { 631 struct cfg80211_mgmt_registration *reg, *tmp; 632 633 spin_lock_bh(&wdev->mgmt_registrations_lock); 634 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { 635 list_del(®->list); 636 kfree(reg); 637 } 638 wdev->mgmt_registrations_need_update = 1; 639 spin_unlock_bh(&wdev->mgmt_registrations_lock); 640 641 cfg80211_mgmt_registrations_update(wdev); 642 } 643 644 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 645 struct wireless_dev *wdev, 646 struct cfg80211_mgmt_tx_params *params, u64 *cookie) 647 { 648 const struct ieee80211_mgmt *mgmt; 649 u16 stype; 650 651 if (!wdev->wiphy->mgmt_stypes) 652 return -EOPNOTSUPP; 653 654 if (!rdev->ops->mgmt_tx) 655 return -EOPNOTSUPP; 656 657 if (params->len < 24 + 1) 658 return -EINVAL; 659 660 mgmt = (const struct ieee80211_mgmt *)params->buf; 661 662 if (!ieee80211_is_mgmt(mgmt->frame_control)) 663 return -EINVAL; 664 665 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; 666 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4))) 667 return -EINVAL; 668 669 if (ieee80211_is_action(mgmt->frame_control) && 670 mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) { 671 int err = 0; 672 673 wdev_lock(wdev); 674 675 switch (wdev->iftype) { 676 case NL80211_IFTYPE_ADHOC: 677 case NL80211_IFTYPE_STATION: 678 case NL80211_IFTYPE_P2P_CLIENT: 679 if (!wdev->current_bss) { 680 err = -ENOTCONN; 681 break; 682 } 683 684 if (!ether_addr_equal(wdev->current_bss->pub.bssid, 685 mgmt->bssid)) { 686 err = -ENOTCONN; 687 break; 688 } 689 690 /* 691 * check for IBSS DA must be done by driver as 692 * cfg80211 doesn't track the stations 693 */ 694 if (wdev->iftype == NL80211_IFTYPE_ADHOC) 695 break; 696 697 /* for station, check that DA is the AP */ 698 if (!ether_addr_equal(wdev->current_bss->pub.bssid, 699 mgmt->da)) { 700 err = -ENOTCONN; 701 break; 702 } 703 break; 704 case NL80211_IFTYPE_AP: 705 case NL80211_IFTYPE_P2P_GO: 706 case NL80211_IFTYPE_AP_VLAN: 707 if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev))) 708 err = -EINVAL; 709 break; 710 case NL80211_IFTYPE_MESH_POINT: 711 if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) { 712 err = -EINVAL; 713 break; 714 } 715 /* 716 * check for mesh DA must be done by driver as 717 * cfg80211 doesn't track the stations 718 */ 719 break; 720 case NL80211_IFTYPE_P2P_DEVICE: 721 /* 722 * fall through, P2P device only supports 723 * public action frames 724 */ 725 case NL80211_IFTYPE_NAN: 726 default: 727 err = -EOPNOTSUPP; 728 break; 729 } 730 wdev_unlock(wdev); 731 732 if (err) 733 return err; 734 } 735 736 if (!ether_addr_equal(mgmt->sa, wdev_address(wdev))) { 737 /* Allow random TA to be used with Public Action frames if the 738 * driver has indicated support for this. Otherwise, only allow 739 * the local address to be used. 740 */ 741 if (!ieee80211_is_action(mgmt->frame_control) || 742 mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) 743 return -EINVAL; 744 if (!wdev->current_bss && 745 !wiphy_ext_feature_isset( 746 &rdev->wiphy, 747 NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA)) 748 return -EINVAL; 749 if (wdev->current_bss && 750 !wiphy_ext_feature_isset( 751 &rdev->wiphy, 752 NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA_CONNECTED)) 753 return -EINVAL; 754 } 755 756 /* Transmit the Action frame as requested by user space */ 757 return rdev_mgmt_tx(rdev, wdev, params, cookie); 758 } 759 760 bool cfg80211_rx_mgmt_khz(struct wireless_dev *wdev, int freq, int sig_dbm, 761 const u8 *buf, size_t len, u32 flags) 762 { 763 struct wiphy *wiphy = wdev->wiphy; 764 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 765 struct cfg80211_mgmt_registration *reg; 766 const struct ieee80211_txrx_stypes *stypes = 767 &wiphy->mgmt_stypes[wdev->iftype]; 768 struct ieee80211_mgmt *mgmt = (void *)buf; 769 const u8 *data; 770 int data_len; 771 bool result = false; 772 __le16 ftype = mgmt->frame_control & 773 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE); 774 u16 stype; 775 776 trace_cfg80211_rx_mgmt(wdev, freq, sig_dbm); 777 stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4; 778 779 if (!(stypes->rx & BIT(stype))) { 780 trace_cfg80211_return_bool(false); 781 return false; 782 } 783 784 data = buf + ieee80211_hdrlen(mgmt->frame_control); 785 data_len = len - ieee80211_hdrlen(mgmt->frame_control); 786 787 spin_lock_bh(&wdev->mgmt_registrations_lock); 788 789 list_for_each_entry(reg, &wdev->mgmt_registrations, list) { 790 if (reg->frame_type != ftype) 791 continue; 792 793 if (reg->match_len > data_len) 794 continue; 795 796 if (memcmp(reg->match, data, reg->match_len)) 797 continue; 798 799 /* found match! */ 800 801 /* Indicate the received Action frame to user space */ 802 if (nl80211_send_mgmt(rdev, wdev, reg->nlportid, 803 freq, sig_dbm, 804 buf, len, flags, GFP_ATOMIC)) 805 continue; 806 807 result = true; 808 break; 809 } 810 811 spin_unlock_bh(&wdev->mgmt_registrations_lock); 812 813 trace_cfg80211_return_bool(result); 814 return result; 815 } 816 EXPORT_SYMBOL(cfg80211_rx_mgmt_khz); 817 818 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev) 819 { 820 cancel_delayed_work(&rdev->dfs_update_channels_wk); 821 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, 0); 822 } 823 824 void cfg80211_dfs_channels_update_work(struct work_struct *work) 825 { 826 struct delayed_work *delayed_work = to_delayed_work(work); 827 struct cfg80211_registered_device *rdev; 828 struct cfg80211_chan_def chandef; 829 struct ieee80211_supported_band *sband; 830 struct ieee80211_channel *c; 831 struct wiphy *wiphy; 832 bool check_again = false; 833 unsigned long timeout, next_time = 0; 834 unsigned long time_dfs_update; 835 enum nl80211_radar_event radar_event; 836 int bandid, i; 837 838 rdev = container_of(delayed_work, struct cfg80211_registered_device, 839 dfs_update_channels_wk); 840 wiphy = &rdev->wiphy; 841 842 rtnl_lock(); 843 for (bandid = 0; bandid < NUM_NL80211_BANDS; bandid++) { 844 sband = wiphy->bands[bandid]; 845 if (!sband) 846 continue; 847 848 for (i = 0; i < sband->n_channels; i++) { 849 c = &sband->channels[i]; 850 851 if (!(c->flags & IEEE80211_CHAN_RADAR)) 852 continue; 853 854 if (c->dfs_state != NL80211_DFS_UNAVAILABLE && 855 c->dfs_state != NL80211_DFS_AVAILABLE) 856 continue; 857 858 if (c->dfs_state == NL80211_DFS_UNAVAILABLE) { 859 time_dfs_update = IEEE80211_DFS_MIN_NOP_TIME_MS; 860 radar_event = NL80211_RADAR_NOP_FINISHED; 861 } else { 862 if (regulatory_pre_cac_allowed(wiphy) || 863 cfg80211_any_wiphy_oper_chan(wiphy, c)) 864 continue; 865 866 time_dfs_update = REG_PRE_CAC_EXPIRY_GRACE_MS; 867 radar_event = NL80211_RADAR_PRE_CAC_EXPIRED; 868 } 869 870 timeout = c->dfs_state_entered + 871 msecs_to_jiffies(time_dfs_update); 872 873 if (time_after_eq(jiffies, timeout)) { 874 c->dfs_state = NL80211_DFS_USABLE; 875 c->dfs_state_entered = jiffies; 876 877 cfg80211_chandef_create(&chandef, c, 878 NL80211_CHAN_NO_HT); 879 880 nl80211_radar_notify(rdev, &chandef, 881 radar_event, NULL, 882 GFP_ATOMIC); 883 884 regulatory_propagate_dfs_state(wiphy, &chandef, 885 c->dfs_state, 886 radar_event); 887 continue; 888 } 889 890 if (!check_again) 891 next_time = timeout - jiffies; 892 else 893 next_time = min(next_time, timeout - jiffies); 894 check_again = true; 895 } 896 } 897 rtnl_unlock(); 898 899 /* reschedule if there are other channels waiting to be cleared again */ 900 if (check_again) 901 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, 902 next_time); 903 } 904 905 906 void cfg80211_radar_event(struct wiphy *wiphy, 907 struct cfg80211_chan_def *chandef, 908 gfp_t gfp) 909 { 910 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 911 912 trace_cfg80211_radar_event(wiphy, chandef); 913 914 /* only set the chandef supplied channel to unavailable, in 915 * case the radar is detected on only one of multiple channels 916 * spanned by the chandef. 917 */ 918 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE); 919 920 cfg80211_sched_dfs_chan_update(rdev); 921 922 nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp); 923 924 memcpy(&rdev->radar_chandef, chandef, sizeof(struct cfg80211_chan_def)); 925 queue_work(cfg80211_wq, &rdev->propagate_radar_detect_wk); 926 } 927 EXPORT_SYMBOL(cfg80211_radar_event); 928 929 void cfg80211_cac_event(struct net_device *netdev, 930 const struct cfg80211_chan_def *chandef, 931 enum nl80211_radar_event event, gfp_t gfp) 932 { 933 struct wireless_dev *wdev = netdev->ieee80211_ptr; 934 struct wiphy *wiphy = wdev->wiphy; 935 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 936 unsigned long timeout; 937 938 trace_cfg80211_cac_event(netdev, event); 939 940 if (WARN_ON(!wdev->cac_started && event != NL80211_RADAR_CAC_STARTED)) 941 return; 942 943 if (WARN_ON(!wdev->chandef.chan)) 944 return; 945 946 switch (event) { 947 case NL80211_RADAR_CAC_FINISHED: 948 timeout = wdev->cac_start_time + 949 msecs_to_jiffies(wdev->cac_time_ms); 950 WARN_ON(!time_after_eq(jiffies, timeout)); 951 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE); 952 memcpy(&rdev->cac_done_chandef, chandef, 953 sizeof(struct cfg80211_chan_def)); 954 queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk); 955 cfg80211_sched_dfs_chan_update(rdev); 956 fallthrough; 957 case NL80211_RADAR_CAC_ABORTED: 958 wdev->cac_started = false; 959 break; 960 case NL80211_RADAR_CAC_STARTED: 961 wdev->cac_started = true; 962 break; 963 default: 964 WARN_ON(1); 965 return; 966 } 967 968 nl80211_radar_notify(rdev, chandef, event, netdev, gfp); 969 } 970 EXPORT_SYMBOL(cfg80211_cac_event); 971