1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2024 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <linux/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #include <kunit/static_stub.h> 35 36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 40 #define IEEE80211_AUTH_MAX_TRIES 3 41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 42 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 43 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 44 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 45 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 46 #define IEEE80211_ASSOC_MAX_TRIES 3 47 48 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100) 49 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 50 51 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 52 53 static int max_nullfunc_tries = 2; 54 module_param(max_nullfunc_tries, int, 0644); 55 MODULE_PARM_DESC(max_nullfunc_tries, 56 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 57 58 static int max_probe_tries = 5; 59 module_param(max_probe_tries, int, 0644); 60 MODULE_PARM_DESC(max_probe_tries, 61 "Maximum probe tries before disconnecting (reason 4)."); 62 63 /* 64 * Beacon loss timeout is calculated as N frames times the 65 * advertised beacon interval. This may need to be somewhat 66 * higher than what hardware might detect to account for 67 * delays in the host processing frames. But since we also 68 * probe on beacon miss before declaring the connection lost 69 * default to what we want. 70 */ 71 static int beacon_loss_count = 7; 72 module_param(beacon_loss_count, int, 0644); 73 MODULE_PARM_DESC(beacon_loss_count, 74 "Number of beacon intervals before we decide beacon was lost."); 75 76 /* 77 * Time the connection can be idle before we probe 78 * it to see if we can still talk to the AP. 79 */ 80 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 81 /* 82 * Time we wait for a probe response after sending 83 * a probe request because of beacon loss or for 84 * checking the connection still works. 85 */ 86 static int probe_wait_ms = 500; 87 module_param(probe_wait_ms, int, 0644); 88 MODULE_PARM_DESC(probe_wait_ms, 89 "Maximum time(ms) to wait for probe response" 90 " before disconnecting (reason 4)."); 91 92 /* 93 * How many Beacon frames need to have been used in average signal strength 94 * before starting to indicate signal change events. 95 */ 96 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 97 98 /* 99 * We can have multiple work items (and connection probing) 100 * scheduling this timer, but we need to take care to only 101 * reschedule it when it should fire _earlier_ than it was 102 * asked for before, or if it's not pending right now. This 103 * function ensures that. Note that it then is required to 104 * run this function for all timeouts after the first one 105 * has happened -- the work that runs from this timer will 106 * do that. 107 */ 108 static void run_again(struct ieee80211_sub_if_data *sdata, 109 unsigned long timeout) 110 { 111 lockdep_assert_wiphy(sdata->local->hw.wiphy); 112 113 if (!timer_pending(&sdata->u.mgd.timer) || 114 time_before(timeout, sdata->u.mgd.timer.expires)) 115 mod_timer(&sdata->u.mgd.timer, timeout); 116 } 117 118 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 119 { 120 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 121 return; 122 123 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 124 return; 125 126 mod_timer(&sdata->u.mgd.bcn_mon_timer, 127 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 128 } 129 130 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 131 { 132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 133 134 if (unlikely(!ifmgd->associated)) 135 return; 136 137 if (ifmgd->probe_send_count) 138 ifmgd->probe_send_count = 0; 139 140 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 141 return; 142 143 mod_timer(&ifmgd->conn_mon_timer, 144 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 145 } 146 147 static int ecw2cw(int ecw) 148 { 149 return (1 << ecw) - 1; 150 } 151 152 static enum ieee80211_conn_mode 153 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 154 struct ieee80211_channel *channel, 155 u32 vht_cap_info, 156 const struct ieee802_11_elems *elems, 157 bool ignore_ht_channel_mismatch, 158 const struct ieee80211_conn_settings *conn, 159 struct cfg80211_chan_def *chandef) 160 { 161 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 162 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 163 const struct ieee80211_he_operation *he_oper = elems->he_operation; 164 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 165 struct ieee80211_supported_band *sband = 166 sdata->local->hw.wiphy->bands[channel->band]; 167 struct cfg80211_chan_def vht_chandef; 168 bool no_vht = false; 169 u32 ht_cfreq; 170 171 *chandef = (struct cfg80211_chan_def) { 172 .chan = channel, 173 .width = NL80211_CHAN_WIDTH_20_NOHT, 174 .center_freq1 = channel->center_freq, 175 .freq1_offset = channel->freq_offset, 176 }; 177 178 /* get special S1G case out of the way */ 179 if (sband->band == NL80211_BAND_S1GHZ) { 180 if (!ieee80211_chandef_s1g_oper(elems->s1g_oper, chandef)) { 181 sdata_info(sdata, 182 "Missing S1G Operation Element? Trying operating == primary\n"); 183 chandef->width = ieee80211_s1g_channel_width(channel); 184 } 185 186 return IEEE80211_CONN_MODE_S1G; 187 } 188 189 /* get special 6 GHz case out of the way */ 190 if (sband->band == NL80211_BAND_6GHZ) { 191 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 192 193 /* this is an error */ 194 if (conn->mode < IEEE80211_CONN_MODE_HE) 195 return IEEE80211_CONN_MODE_LEGACY; 196 197 if (!elems->he_6ghz_capa || !elems->he_cap) { 198 sdata_info(sdata, 199 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 200 return IEEE80211_CONN_MODE_LEGACY; 201 } 202 203 if (!eht_oper || !elems->eht_cap) { 204 eht_oper = NULL; 205 mode = IEEE80211_CONN_MODE_HE; 206 } 207 208 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 209 eht_oper, chandef)) { 210 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 211 return IEEE80211_CONN_MODE_LEGACY; 212 } 213 214 return mode; 215 } 216 217 /* now we have the progression HT, VHT, ... */ 218 if (conn->mode < IEEE80211_CONN_MODE_HT) 219 return IEEE80211_CONN_MODE_LEGACY; 220 221 if (!ht_oper || !elems->ht_cap_elem) 222 return IEEE80211_CONN_MODE_LEGACY; 223 224 chandef->width = NL80211_CHAN_WIDTH_20; 225 226 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 227 channel->band); 228 /* check that channel matches the right operating channel */ 229 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 230 /* 231 * It's possible that some APs are confused here; 232 * Netgear WNDR3700 sometimes reports 4 higher than 233 * the actual channel in association responses, but 234 * since we look at probe response/beacon data here 235 * it should be OK. 236 */ 237 sdata_info(sdata, 238 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 239 channel->center_freq, ht_cfreq, 240 ht_oper->primary_chan, channel->band); 241 return IEEE80211_CONN_MODE_LEGACY; 242 } 243 244 ieee80211_chandef_ht_oper(ht_oper, chandef); 245 246 if (conn->mode < IEEE80211_CONN_MODE_VHT) 247 return IEEE80211_CONN_MODE_HT; 248 249 vht_chandef = *chandef; 250 251 /* 252 * having he_cap/he_oper parsed out implies we're at 253 * least operating as HE STA 254 */ 255 if (elems->he_cap && he_oper && 256 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 257 struct ieee80211_vht_operation he_oper_vht_cap; 258 259 /* 260 * Set only first 3 bytes (other 2 aren't used in 261 * ieee80211_chandef_vht_oper() anyway) 262 */ 263 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 264 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 265 266 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 267 &he_oper_vht_cap, ht_oper, 268 &vht_chandef)) { 269 sdata_info(sdata, 270 "HE AP VHT information is invalid, disabling HE\n"); 271 /* this will cause us to re-parse as VHT STA */ 272 return IEEE80211_CONN_MODE_VHT; 273 } 274 } else if (!vht_oper || !elems->vht_cap_elem) { 275 if (sband->band == NL80211_BAND_5GHZ) { 276 sdata_info(sdata, 277 "VHT information is missing, disabling VHT\n"); 278 return IEEE80211_CONN_MODE_HT; 279 } 280 no_vht = true; 281 } else if (sband->band == NL80211_BAND_2GHZ) { 282 no_vht = true; 283 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 284 vht_cap_info, 285 vht_oper, ht_oper, 286 &vht_chandef)) { 287 sdata_info(sdata, 288 "AP VHT information is invalid, disabling VHT\n"); 289 return IEEE80211_CONN_MODE_HT; 290 } 291 292 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 293 sdata_info(sdata, 294 "AP VHT information doesn't match HT, disabling VHT\n"); 295 return IEEE80211_CONN_MODE_HT; 296 } 297 298 *chandef = vht_chandef; 299 300 /* stick to current max mode if we or the AP don't have HE */ 301 if (conn->mode < IEEE80211_CONN_MODE_HE || 302 !elems->he_operation || !elems->he_cap) { 303 if (no_vht) 304 return IEEE80211_CONN_MODE_HT; 305 return IEEE80211_CONN_MODE_VHT; 306 } 307 308 /* stick to HE if we or the AP don't have EHT */ 309 if (conn->mode < IEEE80211_CONN_MODE_EHT || 310 !eht_oper || !elems->eht_cap) 311 return IEEE80211_CONN_MODE_HE; 312 313 /* 314 * handle the case that the EHT operation indicates that it holds EHT 315 * operation information (in case that the channel width differs from 316 * the channel width reported in HT/VHT/HE). 317 */ 318 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 319 struct cfg80211_chan_def eht_chandef = *chandef; 320 321 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 322 &eht_chandef); 323 324 eht_chandef.punctured = 325 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 326 327 if (!cfg80211_chandef_valid(&eht_chandef)) { 328 sdata_info(sdata, 329 "AP EHT information is invalid, disabling EHT\n"); 330 return IEEE80211_CONN_MODE_HE; 331 } 332 333 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 334 sdata_info(sdata, 335 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 336 return IEEE80211_CONN_MODE_HE; 337 } 338 339 *chandef = eht_chandef; 340 } 341 342 return IEEE80211_CONN_MODE_EHT; 343 } 344 345 static bool 346 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 347 int link_id, 348 const struct ieee80211_he_cap_elem *he_cap, 349 const struct ieee80211_he_operation *he_op) 350 { 351 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 352 u16 mcs_80_map_tx, mcs_80_map_rx; 353 u16 ap_min_req_set; 354 int nss; 355 356 if (!he_cap) 357 return false; 358 359 /* mcs_nss is right after he_cap info */ 360 he_mcs_nss_supp = (void *)(he_cap + 1); 361 362 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 363 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 364 365 /* P802.11-REVme/D0.3 366 * 27.1.1 Introduction to the HE PHY 367 * ... 368 * An HE STA shall support the following features: 369 * ... 370 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 371 * supported channel widths for HE SU PPDUs 372 */ 373 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 374 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 375 link_id_info(sdata, link_id, 376 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 377 mcs_80_map_tx, mcs_80_map_rx); 378 return false; 379 } 380 381 if (!he_op) 382 return true; 383 384 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 385 386 /* 387 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 388 * zeroes, which is nonsense, and completely inconsistent with itself 389 * (it doesn't have 8 streams). Accept the settings in this case anyway. 390 */ 391 if (!ap_min_req_set) 392 return true; 393 394 /* make sure the AP is consistent with itself 395 * 396 * P802.11-REVme/D0.3 397 * 26.17.1 Basic HE BSS operation 398 * 399 * A STA that is operating in an HE BSS shall be able to receive and 400 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 401 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 402 * MLME-START.request primitive and shall be able to receive at each of 403 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 404 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 405 * primitive 406 */ 407 for (nss = 8; nss > 0; nss--) { 408 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 409 u8 ap_rx_val; 410 u8 ap_tx_val; 411 412 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 413 continue; 414 415 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 416 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 417 418 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 419 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 420 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 421 link_id_info(sdata, link_id, 422 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 423 nss, ap_rx_val, ap_tx_val, ap_op_val); 424 return false; 425 } 426 } 427 428 return true; 429 } 430 431 static bool 432 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 433 struct ieee80211_supported_band *sband, 434 const struct ieee80211_he_operation *he_op) 435 { 436 const struct ieee80211_sta_he_cap *sta_he_cap = 437 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 438 u16 ap_min_req_set; 439 int i; 440 441 if (!sta_he_cap || !he_op) 442 return false; 443 444 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 445 446 /* 447 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 448 * zeroes, which is nonsense, and completely inconsistent with itself 449 * (it doesn't have 8 streams). Accept the settings in this case anyway. 450 */ 451 if (!ap_min_req_set) 452 return true; 453 454 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 455 for (i = 0; i < 3; i++) { 456 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 457 &sta_he_cap->he_mcs_nss_supp; 458 u16 sta_mcs_map_rx = 459 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 460 u16 sta_mcs_map_tx = 461 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 462 u8 nss; 463 bool verified = true; 464 465 /* 466 * For each band there is a maximum of 8 spatial streams 467 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 468 * of 2 bits per NSS (1-8), with the values defined in enum 469 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 470 * capabilities aren't less than the AP's minimum requirements 471 * for this HE BSS per SS. 472 * It is enough to find one such band that meets the reqs. 473 */ 474 for (nss = 8; nss > 0; nss--) { 475 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 476 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 477 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 478 479 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 480 continue; 481 482 /* 483 * Make sure the HE AP doesn't require MCSs that aren't 484 * supported by the client as required by spec 485 * 486 * P802.11-REVme/D0.3 487 * 26.17.1 Basic HE BSS operation 488 * 489 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 490 * a BSS, unless it supports (i.e., is able to both transmit and 491 * receive using) all of the <HE-MCS, NSS> tuples in the basic 492 * HE-MCS and NSS set. 493 */ 494 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 495 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 496 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 497 verified = false; 498 break; 499 } 500 } 501 502 if (verified) 503 return true; 504 } 505 506 /* If here, STA doesn't meet AP's HE min requirements */ 507 return false; 508 } 509 510 static u8 511 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 512 const struct ieee80211_sta_eht_cap *sta_eht_cap, 513 unsigned int idx, int bw) 514 { 515 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 516 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 517 518 /* handle us being a 20 MHz-only EHT STA - with four values 519 * for MCS 0-7, 8-9, 10-11, 12-13. 520 */ 521 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 522 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 523 524 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 525 if (idx > 0) 526 idx--; 527 528 switch (bw) { 529 case 0: 530 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 531 case 1: 532 if (!(he_phy_cap0 & 533 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 534 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 535 return 0xff; /* pass check */ 536 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 537 case 2: 538 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 539 return 0xff; /* pass check */ 540 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 541 } 542 543 WARN_ON(1); 544 return 0; 545 } 546 547 static bool 548 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 549 struct ieee80211_supported_band *sband, 550 const struct ieee80211_eht_operation *eht_op) 551 { 552 const struct ieee80211_sta_he_cap *sta_he_cap = 553 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 554 const struct ieee80211_sta_eht_cap *sta_eht_cap = 555 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 556 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 557 unsigned int i; 558 559 if (!sta_he_cap || !sta_eht_cap || !eht_op) 560 return false; 561 562 req = &eht_op->basic_mcs_nss; 563 564 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 565 u8 req_rx_nss, req_tx_nss; 566 unsigned int bw; 567 568 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 569 IEEE80211_EHT_MCS_NSS_RX); 570 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 571 IEEE80211_EHT_MCS_NSS_TX); 572 573 for (bw = 0; bw < 3; bw++) { 574 u8 have, have_rx_nss, have_tx_nss; 575 576 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 577 sta_eht_cap, 578 i, bw); 579 have_rx_nss = u8_get_bits(have, 580 IEEE80211_EHT_MCS_NSS_RX); 581 have_tx_nss = u8_get_bits(have, 582 IEEE80211_EHT_MCS_NSS_TX); 583 584 if (req_rx_nss > have_rx_nss || 585 req_tx_nss > have_tx_nss) 586 return false; 587 } 588 } 589 590 return true; 591 } 592 593 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 594 const u8 *supp_rates, 595 unsigned int supp_rates_len, 596 const u8 *ext_supp_rates, 597 unsigned int ext_supp_rates_len, 598 u32 *rates, u32 *basic_rates, 599 unsigned long *unknown_rates_selectors, 600 bool *have_higher_than_11mbit, 601 int *min_rate, int *min_rate_index) 602 { 603 int i, j; 604 605 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 606 u8 supp_rate = i < supp_rates_len ? 607 supp_rates[i] : 608 ext_supp_rates[i - supp_rates_len]; 609 int rate = supp_rate & 0x7f; 610 bool is_basic = !!(supp_rate & 0x80); 611 612 if ((rate * 5) > 110 && have_higher_than_11mbit) 613 *have_higher_than_11mbit = true; 614 615 /* 616 * Skip membership selectors since they're not rates. 617 * 618 * Note: Even though the membership selector and the basic 619 * rate flag share the same bit, they are not exactly 620 * the same. 621 */ 622 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 623 if (unknown_rates_selectors) 624 set_bit(rate, unknown_rates_selectors); 625 continue; 626 } 627 628 for (j = 0; j < sband->n_bitrates; j++) { 629 struct ieee80211_rate *br; 630 int brate; 631 632 br = &sband->bitrates[j]; 633 634 brate = DIV_ROUND_UP(br->bitrate, 5); 635 if (brate == rate) { 636 if (rates) 637 *rates |= BIT(j); 638 if (is_basic && basic_rates) 639 *basic_rates |= BIT(j); 640 if (min_rate && (rate * 5) < *min_rate) { 641 *min_rate = rate * 5; 642 if (min_rate_index) 643 *min_rate_index = j; 644 } 645 break; 646 } 647 } 648 649 /* Handle an unknown entry as if it is an unknown selector */ 650 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 651 set_bit(rate, unknown_rates_selectors); 652 } 653 } 654 655 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 656 const struct cfg80211_chan_def *chandef, 657 u32 prohibited_flags) 658 { 659 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 660 chandef, prohibited_flags)) 661 return false; 662 663 if (chandef->punctured && 664 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 665 return false; 666 667 if (chandef->punctured && chandef->chan->band == NL80211_BAND_5GHZ && 668 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING_5GHZ)) 669 return false; 670 671 return true; 672 } 673 674 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 675 { 676 if (c->width == NL80211_CHAN_WIDTH_80P80) 677 return 4 + 4; 678 679 return nl80211_chan_width_to_mhz(c->width) / 20; 680 } 681 682 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 683 { 684 switch (c->width) { 685 case NL80211_CHAN_WIDTH_20: 686 case NL80211_CHAN_WIDTH_20_NOHT: 687 return 1; 688 case NL80211_CHAN_WIDTH_40: 689 return 2; 690 case NL80211_CHAN_WIDTH_80P80: 691 case NL80211_CHAN_WIDTH_80: 692 return 3; 693 case NL80211_CHAN_WIDTH_160: 694 return 4; 695 case NL80211_CHAN_WIDTH_320: 696 return 5; 697 default: 698 WARN_ON(1); 699 return 0; 700 } 701 } 702 703 VISIBLE_IF_MAC80211_KUNIT int 704 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 705 u8 n_partial_subchans) 706 { 707 int n = ieee80211_chandef_num_subchans(ap); 708 struct cfg80211_chan_def tmp = *ap; 709 int offset = 0; 710 711 /* 712 * Given a chandef (in this context, it's the AP's) and a number 713 * of subchannels that we want to look at ('n_partial_subchans'), 714 * calculate the offset in number of subchannels between the full 715 * and the subset with the desired width. 716 */ 717 718 /* same number of subchannels means no offset, obviously */ 719 if (n == n_partial_subchans) 720 return 0; 721 722 /* don't WARN - misconfigured APs could cause this if their N > width */ 723 if (n < n_partial_subchans) 724 return 0; 725 726 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 727 u32 prev = tmp.center_freq1; 728 729 ieee80211_chandef_downgrade(&tmp, NULL); 730 731 /* 732 * if center_freq moved up, half the original channels 733 * are gone now but were below, so increase offset 734 */ 735 if (prev < tmp.center_freq1) 736 offset += ieee80211_chandef_num_subchans(&tmp); 737 } 738 739 /* 740 * 80+80 with secondary 80 below primary - four subchannels for it 741 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 742 */ 743 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 744 ap->center_freq2 < ap->center_freq1) 745 offset += 4; 746 747 return offset; 748 } 749 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 750 751 VISIBLE_IF_MAC80211_KUNIT void 752 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 753 const struct cfg80211_chan_def *ap, 754 const struct cfg80211_chan_def *used) 755 { 756 u8 needed = ieee80211_chandef_num_subchans(used); 757 u8 have = ieee80211_chandef_num_subchans(ap); 758 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 759 u8 offset; 760 761 if (!psd->valid) 762 return; 763 764 /* if N is zero, all defaults were used, no point in rearranging */ 765 if (!psd->n) 766 goto out; 767 768 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 769 770 /* 771 * This assumes that 'N' is consistent with the HE channel, as 772 * it should be (otherwise the AP is broken). 773 * 774 * In psd->power we have values in the order 0..N, 0..K, where 775 * N+K should cover the entire channel per 'ap', but even if it 776 * doesn't then we've pre-filled 'unlimited' as defaults. 777 * 778 * But this is all the wrong order, we want to have them in the 779 * order of the 'used' channel. 780 * 781 * So for example, we could have a 320 MHz EHT AP, which has the 782 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 783 * seem to be considered for the TPE), as follows: 784 * 785 * EHT 320: | | | | | | | | | | | | | | | | | 786 * HE 80: | | | | | 787 * used 160: | | | | | | | | | 788 * 789 * N entries: |--|--|--|--| 790 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 791 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 792 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 793 * used chan: 0 1 2 3 4 5 6 7 794 * 795 * The idx in the power array ('power idx') is like this since it 796 * comes directly from the element's N and K entries in their 797 * element order, and those are this way for HE compatibility. 798 * 799 * Rearrange them as desired here, first by putting them into the 800 * 'full chan' order, and then selecting the necessary subset for 801 * the 'used chan'. 802 */ 803 804 /* first reorder according to AP channel */ 805 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 806 for (int i = 0; i < have; i++) { 807 if (i < offset) 808 tmp[i] = psd->power[i + psd->n]; 809 else if (i < offset + psd->n) 810 tmp[i] = psd->power[i - offset]; 811 else 812 tmp[i] = psd->power[i]; 813 } 814 815 /* 816 * and then select the subset for the used channel 817 * (set everything to defaults first in case a driver is confused) 818 */ 819 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 820 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 821 for (int i = 0; i < needed; i++) 822 psd->power[i] = tmp[offset + i]; 823 824 out: 825 /* limit, but don't lie if there are defaults in the data */ 826 if (needed < psd->count) 827 psd->count = needed; 828 } 829 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 830 831 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 832 const struct cfg80211_chan_def *ap, 833 const struct cfg80211_chan_def *used) 834 { 835 /* ignore this completely for narrow/invalid channels */ 836 if (!ieee80211_chandef_num_subchans(ap) || 837 !ieee80211_chandef_num_subchans(used)) { 838 ieee80211_clear_tpe(tpe); 839 return; 840 } 841 842 for (int i = 0; i < 2; i++) { 843 int needed_pwr_count; 844 845 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 846 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 847 848 /* limit this to the widths we actually need */ 849 needed_pwr_count = ieee80211_chandef_num_widths(used); 850 if (needed_pwr_count < tpe->max_local[i].count) 851 tpe->max_local[i].count = needed_pwr_count; 852 if (needed_pwr_count < tpe->max_reg_client[i].count) 853 tpe->max_reg_client[i].count = needed_pwr_count; 854 } 855 } 856 857 /* 858 * The AP part of the channel request is used to distinguish settings 859 * to the device used for wider bandwidth OFDMA. This is used in the 860 * channel context code to assign two channel contexts even if they're 861 * both for the same channel, if the AP bandwidths are incompatible. 862 * If not EHT (or driver override) then ap.chan == NULL indicates that 863 * there's no wider BW OFDMA used. 864 */ 865 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 866 struct ieee80211_chan_req *chanreq, 867 struct ieee80211_conn_settings *conn, 868 struct cfg80211_chan_def *ap_chandef) 869 { 870 chanreq->ap.chan = NULL; 871 872 if (conn->mode < IEEE80211_CONN_MODE_EHT) 873 return; 874 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 875 return; 876 877 chanreq->ap = *ap_chandef; 878 } 879 880 static struct ieee802_11_elems * 881 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 882 struct ieee80211_conn_settings *conn, 883 struct cfg80211_bss *cbss, int link_id, 884 struct ieee80211_chan_req *chanreq, 885 struct cfg80211_chan_def *ap_chandef, 886 unsigned long *userspace_selectors) 887 { 888 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 889 struct ieee80211_bss *bss = (void *)cbss->priv; 890 struct ieee80211_channel *channel = cbss->channel; 891 struct ieee80211_elems_parse_params parse_params = { 892 .link_id = -1, 893 .from_ap = true, 894 .start = ies->data, 895 .len = ies->len, 896 }; 897 struct ieee802_11_elems *elems; 898 struct ieee80211_supported_band *sband; 899 enum ieee80211_conn_mode ap_mode; 900 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 901 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 902 int ret; 903 904 again: 905 parse_params.mode = conn->mode; 906 elems = ieee802_11_parse_elems_full(&parse_params); 907 if (!elems) 908 return ERR_PTR(-ENOMEM); 909 910 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 911 elems, false, conn, ap_chandef); 912 913 /* this should be impossible since parsing depends on our mode */ 914 if (WARN_ON(ap_mode > conn->mode)) { 915 ret = -EINVAL; 916 goto free; 917 } 918 919 if (conn->mode != ap_mode) { 920 conn->mode = ap_mode; 921 kfree(elems); 922 goto again; 923 } 924 925 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 926 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 927 928 sband = sdata->local->hw.wiphy->bands[channel->band]; 929 930 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 931 elems->ext_supp_rates, elems->ext_supp_rates_len, 932 NULL, NULL, unknown_rates_selectors, NULL, NULL, 933 NULL); 934 935 switch (channel->band) { 936 case NL80211_BAND_S1GHZ: 937 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 938 ret = -EINVAL; 939 goto free; 940 } 941 return elems; 942 case NL80211_BAND_6GHZ: 943 if (ap_mode < IEEE80211_CONN_MODE_HE) { 944 link_id_info(sdata, link_id, 945 "Rejecting non-HE 6/7 GHz connection"); 946 ret = -EINVAL; 947 goto free; 948 } 949 break; 950 default: 951 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 952 ret = -EINVAL; 953 goto free; 954 } 955 } 956 957 switch (ap_mode) { 958 case IEEE80211_CONN_MODE_S1G: 959 WARN_ON(1); 960 ret = -EINVAL; 961 goto free; 962 case IEEE80211_CONN_MODE_LEGACY: 963 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 964 break; 965 case IEEE80211_CONN_MODE_HT: 966 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 967 conn->bw_limit, 968 IEEE80211_CONN_BW_LIMIT_40); 969 break; 970 case IEEE80211_CONN_MODE_VHT: 971 case IEEE80211_CONN_MODE_HE: 972 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 973 conn->bw_limit, 974 IEEE80211_CONN_BW_LIMIT_160); 975 break; 976 case IEEE80211_CONN_MODE_EHT: 977 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 978 conn->bw_limit, 979 IEEE80211_CONN_BW_LIMIT_320); 980 break; 981 } 982 983 chanreq->oper = *ap_chandef; 984 985 bitmap_copy(sta_selectors, userspace_selectors, 128); 986 if (conn->mode >= IEEE80211_CONN_MODE_HT) 987 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 988 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 989 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 990 if (conn->mode >= IEEE80211_CONN_MODE_HE) 991 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 992 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 993 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 994 995 /* 996 * We do not support EPD or GLK so never add them. 997 * SAE_H2E is handled through userspace_selectors. 998 */ 999 1000 /* Check if we support all required features */ 1001 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1002 link_id_info(sdata, link_id, 1003 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1004 ret = -EINVAL; 1005 goto free; 1006 } 1007 1008 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1009 1010 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1011 IEEE80211_CHAN_DISABLED)) { 1012 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 1013 ret = -EINVAL; 1014 goto free; 1015 } 1016 1017 ieee80211_chanreq_downgrade(chanreq, conn); 1018 } 1019 1020 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1021 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1022 IEEE80211_CHAN_NO_HE)) { 1023 conn->mode = IEEE80211_CONN_MODE_VHT; 1024 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1025 conn->bw_limit, 1026 IEEE80211_CONN_BW_LIMIT_160); 1027 } 1028 1029 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1030 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1031 IEEE80211_CHAN_NO_EHT)) { 1032 conn->mode = IEEE80211_CONN_MODE_HE; 1033 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1034 conn->bw_limit, 1035 IEEE80211_CONN_BW_LIMIT_160); 1036 } 1037 1038 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1039 link_id_info(sdata, link_id, 1040 "regulatory prevented using AP config, downgraded\n"); 1041 1042 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1043 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1044 (void *)elems->he_cap, 1045 elems->he_operation) || 1046 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1047 elems->he_operation))) { 1048 conn->mode = IEEE80211_CONN_MODE_VHT; 1049 link_id_info(sdata, link_id, 1050 "required MCSes not supported, disabling HE\n"); 1051 } 1052 1053 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1054 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1055 elems->eht_operation)) { 1056 conn->mode = IEEE80211_CONN_MODE_HE; 1057 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1058 conn->bw_limit, 1059 IEEE80211_CONN_BW_LIMIT_160); 1060 link_id_info(sdata, link_id, 1061 "required MCSes not supported, disabling EHT\n"); 1062 } 1063 1064 /* the mode can only decrease, so this must terminate */ 1065 if (ap_mode != conn->mode) { 1066 kfree(elems); 1067 goto again; 1068 } 1069 1070 mlme_link_id_dbg(sdata, link_id, 1071 "connecting with %s mode, max bandwidth %d MHz\n", 1072 ieee80211_conn_mode_str(conn->mode), 1073 20 * (1 << conn->bw_limit)); 1074 1075 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1076 ret = -EINVAL; 1077 goto free; 1078 } 1079 1080 return elems; 1081 free: 1082 kfree(elems); 1083 return ERR_PTR(ret); 1084 } 1085 1086 static int ieee80211_config_bw(struct ieee80211_link_data *link, 1087 struct ieee802_11_elems *elems, 1088 bool update, u64 *changed, 1089 const char *frame) 1090 { 1091 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1092 struct ieee80211_sub_if_data *sdata = link->sdata; 1093 struct ieee80211_chan_req chanreq = {}; 1094 struct cfg80211_chan_def ap_chandef; 1095 enum ieee80211_conn_mode ap_mode; 1096 u32 vht_cap_info = 0; 1097 u16 ht_opmode; 1098 int ret; 1099 1100 /* don't track any bandwidth changes in legacy/S1G modes */ 1101 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1102 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1103 return 0; 1104 1105 if (elems->vht_cap_elem) 1106 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1107 1108 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1109 elems, true, &link->u.mgd.conn, 1110 &ap_chandef); 1111 1112 if (ap_mode != link->u.mgd.conn.mode) { 1113 link_info(link, 1114 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1115 link->u.mgd.bssid, 1116 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1117 ieee80211_conn_mode_str(ap_mode), frame); 1118 return -EINVAL; 1119 } 1120 1121 chanreq.oper = ap_chandef; 1122 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1123 &ap_chandef); 1124 1125 /* 1126 * if HT operation mode changed store the new one - 1127 * this may be applicable even if channel is identical 1128 */ 1129 if (elems->ht_operation) { 1130 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1131 if (link->conf->ht_operation_mode != ht_opmode) { 1132 *changed |= BSS_CHANGED_HT; 1133 link->conf->ht_operation_mode = ht_opmode; 1134 } 1135 } 1136 1137 /* 1138 * Downgrade the new channel if we associated with restricted 1139 * bandwidth capabilities. For example, if we associated as a 1140 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1141 * or config reasons) then switching to a 40 MHz channel now 1142 * won't do us any good -- we couldn't use it with the AP. 1143 */ 1144 while (link->u.mgd.conn.bw_limit < 1145 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1146 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1147 1148 if (ap_chandef.chan->band == NL80211_BAND_6GHZ && 1149 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1150 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1151 &chanreq.oper); 1152 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1153 link->conf->tpe = elems->tpe; 1154 *changed |= BSS_CHANGED_TPE; 1155 } 1156 } 1157 1158 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1159 return 0; 1160 1161 link_info(link, 1162 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1163 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1164 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1165 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1166 chanreq.oper.center_freq2); 1167 1168 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1169 sdata_info(sdata, 1170 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1171 link->u.mgd.bssid, frame); 1172 return -EINVAL; 1173 } 1174 1175 if (!update) { 1176 link->conf->chanreq = chanreq; 1177 return 0; 1178 } 1179 1180 /* 1181 * We're tracking the current AP here, so don't do any further checks 1182 * here. This keeps us from playing ping-pong with regulatory, without 1183 * it the following can happen (for example): 1184 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1185 * - AP advertises regdom US 1186 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1187 * - we detect an unsupported channel and disconnect 1188 * - disconnect causes CRDA to reload world regdomain and the game 1189 * starts anew. 1190 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1191 * 1192 * It seems possible that there are still scenarios with CSA or real 1193 * bandwidth changes where a this could happen, but those cases are 1194 * less common and wouldn't completely prevent using the AP. 1195 */ 1196 1197 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1198 if (ret) { 1199 sdata_info(sdata, 1200 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1201 link->u.mgd.bssid, frame); 1202 return ret; 1203 } 1204 1205 cfg80211_schedule_channels_check(&sdata->wdev); 1206 return 0; 1207 } 1208 1209 /* frame sending functions */ 1210 1211 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1212 struct sk_buff *skb, u8 ap_ht_param, 1213 struct ieee80211_supported_band *sband, 1214 struct ieee80211_channel *channel, 1215 enum ieee80211_smps_mode smps, 1216 const struct ieee80211_conn_settings *conn) 1217 { 1218 u8 *pos; 1219 u32 flags = channel->flags; 1220 u16 cap; 1221 struct ieee80211_sta_ht_cap ht_cap; 1222 1223 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1224 1225 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1226 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1227 1228 /* determine capability flags */ 1229 cap = ht_cap.cap; 1230 1231 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1232 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1233 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1234 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1235 cap &= ~IEEE80211_HT_CAP_SGI_40; 1236 } 1237 break; 1238 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1239 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1240 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1241 cap &= ~IEEE80211_HT_CAP_SGI_40; 1242 } 1243 break; 1244 } 1245 1246 /* 1247 * If 40 MHz was disabled associate as though we weren't 1248 * capable of 40 MHz -- some broken APs will never fall 1249 * back to trying to transmit in 20 MHz. 1250 */ 1251 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1252 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1253 cap &= ~IEEE80211_HT_CAP_SGI_40; 1254 } 1255 1256 /* set SM PS mode properly */ 1257 cap &= ~IEEE80211_HT_CAP_SM_PS; 1258 switch (smps) { 1259 case IEEE80211_SMPS_AUTOMATIC: 1260 case IEEE80211_SMPS_NUM_MODES: 1261 WARN_ON(1); 1262 fallthrough; 1263 case IEEE80211_SMPS_OFF: 1264 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1265 IEEE80211_HT_CAP_SM_PS_SHIFT; 1266 break; 1267 case IEEE80211_SMPS_STATIC: 1268 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1269 IEEE80211_HT_CAP_SM_PS_SHIFT; 1270 break; 1271 case IEEE80211_SMPS_DYNAMIC: 1272 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1273 IEEE80211_HT_CAP_SM_PS_SHIFT; 1274 break; 1275 } 1276 1277 /* reserve and fill IE */ 1278 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1279 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1280 } 1281 1282 /* This function determines vht capability flags for the association 1283 * and builds the IE. 1284 * Note - the function returns true to own the MU-MIMO capability 1285 */ 1286 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1287 struct sk_buff *skb, 1288 struct ieee80211_supported_band *sband, 1289 struct ieee80211_vht_cap *ap_vht_cap, 1290 const struct ieee80211_conn_settings *conn) 1291 { 1292 struct ieee80211_local *local = sdata->local; 1293 u8 *pos; 1294 u32 cap; 1295 struct ieee80211_sta_vht_cap vht_cap; 1296 u32 mask, ap_bf_sts, our_bf_sts; 1297 bool mu_mimo_owner = false; 1298 1299 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1300 1301 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1302 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1303 1304 /* determine capability flags */ 1305 cap = vht_cap.cap; 1306 1307 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1308 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1309 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1310 } 1311 1312 /* 1313 * Some APs apparently get confused if our capabilities are better 1314 * than theirs, so restrict what we advertise in the assoc request. 1315 */ 1316 if (!(ap_vht_cap->vht_cap_info & 1317 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1318 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1319 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1320 else if (!(ap_vht_cap->vht_cap_info & 1321 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1322 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1323 1324 /* 1325 * If some other vif is using the MU-MIMO capability we cannot associate 1326 * using MU-MIMO - this will lead to contradictions in the group-id 1327 * mechanism. 1328 * Ownership is defined since association request, in order to avoid 1329 * simultaneous associations with MU-MIMO. 1330 */ 1331 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1332 bool disable_mu_mimo = false; 1333 struct ieee80211_sub_if_data *other; 1334 1335 list_for_each_entry(other, &local->interfaces, list) { 1336 if (other->vif.bss_conf.mu_mimo_owner) { 1337 disable_mu_mimo = true; 1338 break; 1339 } 1340 } 1341 if (disable_mu_mimo) 1342 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1343 else 1344 mu_mimo_owner = true; 1345 } 1346 1347 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1348 1349 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1350 our_bf_sts = cap & mask; 1351 1352 if (ap_bf_sts < our_bf_sts) { 1353 cap &= ~mask; 1354 cap |= ap_bf_sts; 1355 } 1356 1357 /* reserve and fill IE */ 1358 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1359 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1360 1361 return mu_mimo_owner; 1362 } 1363 1364 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 1365 enum nl80211_chan_width width, 1366 struct ieee80211_supported_band *sband, 1367 struct ieee80211_mgd_assoc_data *assoc_data) 1368 { 1369 u32 rates; 1370 1371 if (assoc_data->supp_rates_len) { 1372 /* 1373 * Get all rates supported by the device and the AP as 1374 * some APs don't like getting a superset of their rates 1375 * in the association request (e.g. D-Link DAP 1353 in 1376 * b-only mode)... 1377 */ 1378 ieee80211_parse_bitrates(width, sband, 1379 assoc_data->supp_rates, 1380 assoc_data->supp_rates_len, 1381 &rates); 1382 } else { 1383 /* 1384 * In case AP not provide any supported rates information 1385 * before association, we send information element(s) with 1386 * all rates that we support. 1387 */ 1388 rates = ~0; 1389 } 1390 1391 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1392 WLAN_EID_SUPP_RATES); 1393 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1394 WLAN_EID_EXT_SUPP_RATES); 1395 } 1396 1397 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1398 const u8 *elems, 1399 size_t elems_len, 1400 size_t offset) 1401 { 1402 size_t noffset; 1403 1404 static const u8 before_ht[] = { 1405 WLAN_EID_SSID, 1406 WLAN_EID_SUPP_RATES, 1407 WLAN_EID_EXT_SUPP_RATES, 1408 WLAN_EID_PWR_CAPABILITY, 1409 WLAN_EID_SUPPORTED_CHANNELS, 1410 WLAN_EID_RSN, 1411 WLAN_EID_QOS_CAPA, 1412 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1413 WLAN_EID_MOBILITY_DOMAIN, 1414 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1415 WLAN_EID_RIC_DATA, /* reassoc only */ 1416 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1417 }; 1418 static const u8 after_ric[] = { 1419 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1420 WLAN_EID_HT_CAPABILITY, 1421 WLAN_EID_BSS_COEX_2040, 1422 /* luckily this is almost always there */ 1423 WLAN_EID_EXT_CAPABILITY, 1424 WLAN_EID_QOS_TRAFFIC_CAPA, 1425 WLAN_EID_TIM_BCAST_REQ, 1426 WLAN_EID_INTERWORKING, 1427 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1428 WLAN_EID_VHT_CAPABILITY, 1429 WLAN_EID_OPMODE_NOTIF, 1430 }; 1431 1432 if (!elems_len) 1433 return offset; 1434 1435 noffset = ieee80211_ie_split_ric(elems, elems_len, 1436 before_ht, 1437 ARRAY_SIZE(before_ht), 1438 after_ric, 1439 ARRAY_SIZE(after_ric), 1440 offset); 1441 skb_put_data(skb, elems + offset, noffset - offset); 1442 1443 return noffset; 1444 } 1445 1446 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1447 const u8 *elems, 1448 size_t elems_len, 1449 size_t offset) 1450 { 1451 static const u8 before_vht[] = { 1452 /* 1453 * no need to list the ones split off before HT 1454 * or generated here 1455 */ 1456 WLAN_EID_BSS_COEX_2040, 1457 WLAN_EID_EXT_CAPABILITY, 1458 WLAN_EID_QOS_TRAFFIC_CAPA, 1459 WLAN_EID_TIM_BCAST_REQ, 1460 WLAN_EID_INTERWORKING, 1461 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1462 }; 1463 size_t noffset; 1464 1465 if (!elems_len) 1466 return offset; 1467 1468 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1469 noffset = ieee80211_ie_split(elems, elems_len, 1470 before_vht, ARRAY_SIZE(before_vht), 1471 offset); 1472 skb_put_data(skb, elems + offset, noffset - offset); 1473 1474 return noffset; 1475 } 1476 1477 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1478 const u8 *elems, 1479 size_t elems_len, 1480 size_t offset) 1481 { 1482 static const u8 before_he[] = { 1483 /* 1484 * no need to list the ones split off before VHT 1485 * or generated here 1486 */ 1487 WLAN_EID_OPMODE_NOTIF, 1488 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1489 /* 11ai elements */ 1490 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1491 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1492 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1493 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1494 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1495 /* TODO: add 11ah/11aj/11ak elements */ 1496 }; 1497 size_t noffset; 1498 1499 if (!elems_len) 1500 return offset; 1501 1502 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1503 noffset = ieee80211_ie_split(elems, elems_len, 1504 before_he, ARRAY_SIZE(before_he), 1505 offset); 1506 skb_put_data(skb, elems + offset, noffset - offset); 1507 1508 return noffset; 1509 } 1510 1511 #define PRESENT_ELEMS_MAX 8 1512 #define PRESENT_ELEM_EXT_OFFS 0x100 1513 1514 static void 1515 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1516 struct sk_buff *skb, u16 capab, 1517 const struct element *ext_capa, 1518 const u16 *present_elems, 1519 struct ieee80211_mgd_assoc_data *assoc_data); 1520 1521 static size_t 1522 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1523 struct sk_buff *skb, u16 *capab, 1524 const struct element *ext_capa, 1525 const u8 *extra_elems, 1526 size_t extra_elems_len, 1527 unsigned int link_id, 1528 struct ieee80211_link_data *link, 1529 u16 *present_elems, 1530 struct ieee80211_mgd_assoc_data *assoc_data) 1531 { 1532 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1533 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1534 struct ieee80211_channel *chan = cbss->channel; 1535 const struct ieee80211_sband_iftype_data *iftd; 1536 struct ieee80211_local *local = sdata->local; 1537 struct ieee80211_supported_band *sband; 1538 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1539 struct ieee80211_chanctx_conf *chanctx_conf; 1540 enum ieee80211_smps_mode smps_mode; 1541 u16 orig_capab = *capab; 1542 size_t offset = 0; 1543 int present_elems_len = 0; 1544 u8 *pos; 1545 int i; 1546 1547 #define ADD_PRESENT_ELEM(id) do { \ 1548 /* need a last for termination - we use 0 == SSID */ \ 1549 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1550 present_elems[present_elems_len++] = (id); \ 1551 } while (0) 1552 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1553 1554 if (link) 1555 smps_mode = link->smps_mode; 1556 else if (sdata->u.mgd.powersave) 1557 smps_mode = IEEE80211_SMPS_DYNAMIC; 1558 else 1559 smps_mode = IEEE80211_SMPS_OFF; 1560 1561 if (link) { 1562 /* 1563 * 5/10 MHz scenarios are only viable without MLO, in which 1564 * case this pointer should be used ... All of this is a bit 1565 * unclear though, not sure this even works at all. 1566 */ 1567 rcu_read_lock(); 1568 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1569 if (chanctx_conf) 1570 width = chanctx_conf->def.width; 1571 rcu_read_unlock(); 1572 } 1573 1574 sband = local->hw.wiphy->bands[chan->band]; 1575 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1576 1577 if (sband->band == NL80211_BAND_2GHZ) { 1578 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1579 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1580 } 1581 1582 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1583 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1584 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1585 1586 if (sband->band != NL80211_BAND_S1GHZ) 1587 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1588 1589 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1590 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1591 struct cfg80211_chan_def chandef = { 1592 .width = width, 1593 .chan = chan, 1594 }; 1595 1596 pos = skb_put(skb, 4); 1597 *pos++ = WLAN_EID_PWR_CAPABILITY; 1598 *pos++ = 2; 1599 *pos++ = 0; /* min tx power */ 1600 /* max tx power */ 1601 *pos++ = ieee80211_chandef_max_power(&chandef); 1602 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1603 } 1604 1605 /* 1606 * Per spec, we shouldn't include the list of channels if we advertise 1607 * support for extended channel switching, but we've always done that; 1608 * (for now?) apply this restriction only on the (new) 6 GHz band. 1609 */ 1610 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1611 (sband->band != NL80211_BAND_6GHZ || 1612 !ext_capa || ext_capa->datalen < 1 || 1613 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1614 /* TODO: get this in reg domain format */ 1615 pos = skb_put(skb, 2 * sband->n_channels + 2); 1616 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1617 *pos++ = 2 * sband->n_channels; 1618 for (i = 0; i < sband->n_channels; i++) { 1619 int cf = sband->channels[i].center_freq; 1620 1621 *pos++ = ieee80211_frequency_to_channel(cf); 1622 *pos++ = 1; /* one channel in the subband*/ 1623 } 1624 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1625 } 1626 1627 /* if present, add any custom IEs that go before HT */ 1628 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1629 extra_elems_len, 1630 offset); 1631 1632 if (sband->band != NL80211_BAND_6GHZ && 1633 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1634 ieee80211_add_ht_ie(sdata, skb, 1635 assoc_data->link[link_id].ap_ht_param, 1636 sband, chan, smps_mode, 1637 &assoc_data->link[link_id].conn); 1638 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1639 } 1640 1641 /* if present, add any custom IEs that go before VHT */ 1642 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1643 extra_elems_len, 1644 offset); 1645 1646 if (sband->band != NL80211_BAND_6GHZ && 1647 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1648 sband->vht_cap.vht_supported) { 1649 bool mu_mimo_owner = 1650 ieee80211_add_vht_ie(sdata, skb, sband, 1651 &assoc_data->link[link_id].ap_vht_cap, 1652 &assoc_data->link[link_id].conn); 1653 1654 if (link) 1655 link->conf->mu_mimo_owner = mu_mimo_owner; 1656 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1657 } 1658 1659 /* if present, add any custom IEs that go before HE */ 1660 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1661 extra_elems_len, 1662 offset); 1663 1664 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1665 ieee80211_put_he_cap(skb, sdata, sband, 1666 &assoc_data->link[link_id].conn); 1667 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1668 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1669 } 1670 1671 /* 1672 * careful - need to know about all the present elems before 1673 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1674 * we're going to put it after the ML element 1675 */ 1676 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1677 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1678 1679 if (link_id == assoc_data->assoc_link_id) 1680 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1681 present_elems, assoc_data); 1682 1683 /* crash if somebody gets it wrong */ 1684 present_elems = NULL; 1685 1686 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1687 ieee80211_put_eht_cap(skb, sdata, sband, 1688 &assoc_data->link[link_id].conn); 1689 1690 if (sband->band == NL80211_BAND_S1GHZ) { 1691 ieee80211_add_aid_request_ie(sdata, skb); 1692 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1693 } 1694 1695 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1696 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1697 1698 return offset; 1699 } 1700 1701 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1702 const u16 *outer, 1703 const u16 *inner) 1704 { 1705 unsigned int skb_len = skb->len; 1706 bool at_extension = false; 1707 bool added = false; 1708 int i, j; 1709 u8 *len, *list_len = NULL; 1710 1711 skb_put_u8(skb, WLAN_EID_EXTENSION); 1712 len = skb_put(skb, 1); 1713 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1714 1715 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1716 u16 elem = outer[i]; 1717 bool have_inner = false; 1718 1719 /* should at least be sorted in the sense of normal -> ext */ 1720 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1721 1722 /* switch to extension list */ 1723 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1724 at_extension = true; 1725 if (!list_len) 1726 skb_put_u8(skb, 0); 1727 list_len = NULL; 1728 } 1729 1730 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1731 if (elem == inner[j]) { 1732 have_inner = true; 1733 break; 1734 } 1735 } 1736 1737 if (have_inner) 1738 continue; 1739 1740 if (!list_len) { 1741 list_len = skb_put(skb, 1); 1742 *list_len = 0; 1743 } 1744 *list_len += 1; 1745 skb_put_u8(skb, (u8)elem); 1746 added = true; 1747 } 1748 1749 /* if we added a list but no extension list, make a zero-len one */ 1750 if (added && (!at_extension || !list_len)) 1751 skb_put_u8(skb, 0); 1752 1753 /* if nothing added remove extension element completely */ 1754 if (!added) 1755 skb_trim(skb, skb_len); 1756 else 1757 *len = skb->len - skb_len - 2; 1758 } 1759 1760 static void 1761 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1762 struct sk_buff *skb, u16 capab, 1763 const struct element *ext_capa, 1764 const u16 *outer_present_elems, 1765 struct ieee80211_mgd_assoc_data *assoc_data) 1766 { 1767 struct ieee80211_local *local = sdata->local; 1768 struct ieee80211_multi_link_elem *ml_elem; 1769 struct ieee80211_mle_basic_common_info *common; 1770 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1771 __le16 eml_capa = 0, mld_capa_ops = 0; 1772 unsigned int link_id; 1773 u8 *ml_elem_len; 1774 void *capab_pos; 1775 1776 if (!ieee80211_vif_is_mld(&sdata->vif)) 1777 return; 1778 1779 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1780 ieee80211_vif_type_p2p(&sdata->vif)); 1781 if (ift_ext_capa) { 1782 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1783 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1784 } 1785 1786 skb_put_u8(skb, WLAN_EID_EXTENSION); 1787 ml_elem_len = skb_put(skb, 1); 1788 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1789 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1790 ml_elem->control = 1791 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1792 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1793 common = skb_put(skb, sizeof(*common)); 1794 common->len = sizeof(*common) + 1795 2; /* MLD capa/ops */ 1796 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1797 1798 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1799 if (eml_capa & 1800 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1801 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1802 common->len += 2; /* EML capabilities */ 1803 ml_elem->control |= 1804 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1805 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1806 } 1807 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1808 1809 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1810 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1811 const u8 *extra_elems; 1812 size_t extra_elems_len; 1813 size_t extra_used; 1814 u8 *subelem_len = NULL; 1815 __le16 ctrl; 1816 1817 if (!assoc_data->link[link_id].bss || 1818 link_id == assoc_data->assoc_link_id) 1819 continue; 1820 1821 extra_elems = assoc_data->link[link_id].elems; 1822 extra_elems_len = assoc_data->link[link_id].elems_len; 1823 1824 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1825 subelem_len = skb_put(skb, 1); 1826 1827 ctrl = cpu_to_le16(link_id | 1828 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1829 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1830 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1831 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1832 skb_put_data(skb, assoc_data->link[link_id].addr, 1833 ETH_ALEN); 1834 /* 1835 * Now add the contents of the (re)association request, 1836 * but the "listen interval" and "current AP address" 1837 * (if applicable) are skipped. So we only have 1838 * the capability field (remember the position and fill 1839 * later), followed by the elements added below by 1840 * calling ieee80211_add_link_elems(). 1841 */ 1842 capab_pos = skb_put(skb, 2); 1843 1844 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 1845 ext_capa, 1846 extra_elems, 1847 extra_elems_len, 1848 link_id, NULL, 1849 link_present_elems, 1850 assoc_data); 1851 if (extra_elems) 1852 skb_put_data(skb, extra_elems + extra_used, 1853 extra_elems_len - extra_used); 1854 1855 put_unaligned_le16(capab, capab_pos); 1856 1857 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1858 link_present_elems); 1859 1860 ieee80211_fragment_element(skb, subelem_len, 1861 IEEE80211_MLE_SUBELEM_FRAGMENT); 1862 } 1863 1864 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1865 } 1866 1867 static int 1868 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 1869 enum nl80211_iftype iftype, 1870 struct cfg80211_bss *cbss, 1871 size_t elems_len) 1872 { 1873 struct ieee80211_local *local = sdata->local; 1874 const struct ieee80211_sband_iftype_data *iftd; 1875 struct ieee80211_supported_band *sband; 1876 size_t size = 0; 1877 1878 if (!cbss) 1879 return size; 1880 1881 sband = local->hw.wiphy->bands[cbss->channel->band]; 1882 1883 /* add STA profile elements length */ 1884 size += elems_len; 1885 1886 /* and supported rates length */ 1887 size += 4 + sband->n_bitrates; 1888 1889 /* supported channels */ 1890 size += 2 + 2 * sband->n_channels; 1891 1892 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1893 if (iftd) 1894 size += iftd->vendor_elems.len; 1895 1896 /* power capability */ 1897 size += 4; 1898 1899 /* HT, VHT, HE, EHT */ 1900 size += 2 + sizeof(struct ieee80211_ht_cap); 1901 size += 2 + sizeof(struct ieee80211_vht_cap); 1902 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1903 sizeof(struct ieee80211_he_mcs_nss_supp) + 1904 IEEE80211_HE_PPE_THRES_MAX_LEN; 1905 1906 if (sband->band == NL80211_BAND_6GHZ) 1907 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1908 1909 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1910 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1911 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1912 1913 return size; 1914 } 1915 1916 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1917 { 1918 struct ieee80211_local *local = sdata->local; 1919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1920 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1921 struct ieee80211_link_data *link; 1922 struct sk_buff *skb; 1923 struct ieee80211_mgmt *mgmt; 1924 u8 *pos, qos_info, *ie_start; 1925 size_t offset, noffset; 1926 u16 capab = 0, link_capab; 1927 __le16 listen_int; 1928 struct element *ext_capa = NULL; 1929 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1930 struct ieee80211_prep_tx_info info = {}; 1931 unsigned int link_id, n_links = 0; 1932 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1933 void *capab_pos; 1934 size_t size; 1935 int ret; 1936 1937 /* we know it's writable, cast away the const */ 1938 if (assoc_data->ie_len) 1939 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1940 assoc_data->ie, 1941 assoc_data->ie_len); 1942 1943 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1944 1945 size = local->hw.extra_tx_headroom + 1946 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1947 2 + assoc_data->ssid_len + /* SSID */ 1948 assoc_data->ie_len + /* extra IEs */ 1949 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1950 9; /* WMM */ 1951 1952 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1953 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1954 size_t elems_len = assoc_data->link[link_id].elems_len; 1955 1956 if (!cbss) 1957 continue; 1958 1959 n_links++; 1960 1961 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 1962 elems_len); 1963 1964 /* non-inheritance element */ 1965 size += 2 + 2 + PRESENT_ELEMS_MAX; 1966 1967 /* should be the same across all BSSes */ 1968 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1969 capab |= WLAN_CAPABILITY_PRIVACY; 1970 } 1971 1972 if (ieee80211_vif_is_mld(&sdata->vif)) { 1973 /* consider the multi-link element with STA profile */ 1974 size += sizeof(struct ieee80211_multi_link_elem); 1975 /* max common info field in basic multi-link element */ 1976 size += sizeof(struct ieee80211_mle_basic_common_info) + 1977 2 + /* capa & op */ 1978 2; /* EML capa */ 1979 1980 /* 1981 * The capability elements were already considered above; 1982 * note this over-estimates a bit because there's no 1983 * STA profile for the assoc link. 1984 */ 1985 size += (n_links - 1) * 1986 (1 + 1 + /* subelement ID/length */ 1987 2 + /* STA control */ 1988 1 + ETH_ALEN + 2 /* STA Info field */); 1989 } 1990 1991 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1992 if (WARN_ON(!link)) 1993 return -EINVAL; 1994 1995 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1996 return -EINVAL; 1997 1998 skb = alloc_skb(size, GFP_KERNEL); 1999 if (!skb) 2000 return -ENOMEM; 2001 2002 skb_reserve(skb, local->hw.extra_tx_headroom); 2003 2004 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2005 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2006 2007 /* Set MBSSID support for HE AP if needed */ 2008 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2009 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2010 ext_capa && ext_capa->datalen >= 3) 2011 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2012 2013 mgmt = skb_put_zero(skb, 24); 2014 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2015 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2016 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2017 2018 listen_int = cpu_to_le16(assoc_data->s1g ? 2019 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2020 local->hw.conf.listen_interval); 2021 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2022 skb_put(skb, 10); 2023 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2024 IEEE80211_STYPE_REASSOC_REQ); 2025 capab_pos = &mgmt->u.reassoc_req.capab_info; 2026 mgmt->u.reassoc_req.listen_interval = listen_int; 2027 memcpy(mgmt->u.reassoc_req.current_ap, 2028 assoc_data->prev_ap_addr, ETH_ALEN); 2029 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2030 } else { 2031 skb_put(skb, 4); 2032 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2033 IEEE80211_STYPE_ASSOC_REQ); 2034 capab_pos = &mgmt->u.assoc_req.capab_info; 2035 mgmt->u.assoc_req.listen_interval = listen_int; 2036 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2037 } 2038 2039 /* SSID */ 2040 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2041 ie_start = pos; 2042 *pos++ = WLAN_EID_SSID; 2043 *pos++ = assoc_data->ssid_len; 2044 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2045 2046 /* 2047 * This bit is technically reserved, so it shouldn't matter for either 2048 * the AP or us, but it also means we shouldn't set it. However, we've 2049 * always set it in the past, and apparently some EHT APs check that 2050 * we don't set it. To avoid interoperability issues with old APs that 2051 * for some reason check it and want it to be set, set the bit for all 2052 * pre-EHT connections as we used to do. 2053 */ 2054 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT) 2055 capab |= WLAN_CAPABILITY_ESS; 2056 2057 /* add the elements for the assoc (main) link */ 2058 link_capab = capab; 2059 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2060 ext_capa, 2061 assoc_data->ie, 2062 assoc_data->ie_len, 2063 assoc_data->assoc_link_id, link, 2064 present_elems, assoc_data); 2065 put_unaligned_le16(link_capab, capab_pos); 2066 2067 /* if present, add any custom non-vendor IEs */ 2068 if (assoc_data->ie_len) { 2069 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2070 assoc_data->ie_len, 2071 offset); 2072 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2073 offset = noffset; 2074 } 2075 2076 if (assoc_data->wmm) { 2077 if (assoc_data->uapsd) { 2078 qos_info = ifmgd->uapsd_queues; 2079 qos_info |= (ifmgd->uapsd_max_sp_len << 2080 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2081 } else { 2082 qos_info = 0; 2083 } 2084 2085 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2086 } 2087 2088 /* add any remaining custom (i.e. vendor specific here) IEs */ 2089 if (assoc_data->ie_len) { 2090 noffset = assoc_data->ie_len; 2091 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2092 } 2093 2094 if (assoc_data->fils_kek_len) { 2095 ret = fils_encrypt_assoc_req(skb, assoc_data); 2096 if (ret < 0) { 2097 dev_kfree_skb(skb); 2098 return ret; 2099 } 2100 } 2101 2102 pos = skb_tail_pointer(skb); 2103 kfree(ifmgd->assoc_req_ies); 2104 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2105 if (!ifmgd->assoc_req_ies) { 2106 dev_kfree_skb(skb); 2107 return -ENOMEM; 2108 } 2109 2110 ifmgd->assoc_req_ies_len = pos - ie_start; 2111 2112 info.link_id = assoc_data->assoc_link_id; 2113 drv_mgd_prepare_tx(local, sdata, &info); 2114 2115 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2116 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2117 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2118 IEEE80211_TX_INTFL_MLME_CONN_TX; 2119 ieee80211_tx_skb(sdata, skb); 2120 2121 return 0; 2122 } 2123 2124 void ieee80211_send_pspoll(struct ieee80211_local *local, 2125 struct ieee80211_sub_if_data *sdata) 2126 { 2127 struct ieee80211_pspoll *pspoll; 2128 struct sk_buff *skb; 2129 2130 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2131 if (!skb) 2132 return; 2133 2134 pspoll = (struct ieee80211_pspoll *) skb->data; 2135 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2136 2137 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2138 ieee80211_tx_skb(sdata, skb); 2139 } 2140 2141 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2142 struct ieee80211_sub_if_data *sdata, 2143 bool powersave) 2144 { 2145 struct sk_buff *skb; 2146 struct ieee80211_hdr_3addr *nullfunc; 2147 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2148 2149 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2150 !ieee80211_hw_check(&local->hw, 2151 DOESNT_SUPPORT_QOS_NDP)); 2152 if (!skb) 2153 return; 2154 2155 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2156 if (powersave) 2157 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2158 2159 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2160 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2161 2162 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2163 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2164 2165 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2166 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2167 2168 ieee80211_tx_skb(sdata, skb); 2169 } 2170 2171 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2172 struct ieee80211_sub_if_data *sdata) 2173 { 2174 struct sk_buff *skb; 2175 struct ieee80211_hdr *nullfunc; 2176 __le16 fc; 2177 2178 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2179 return; 2180 2181 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2182 if (!skb) 2183 return; 2184 2185 skb_reserve(skb, local->hw.extra_tx_headroom); 2186 2187 nullfunc = skb_put_zero(skb, 30); 2188 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2189 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2190 nullfunc->frame_control = fc; 2191 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2192 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2193 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2194 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2195 2196 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2197 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2198 ieee80211_tx_skb(sdata, skb); 2199 } 2200 2201 /* spectrum management related things */ 2202 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2203 struct wiphy_work *work) 2204 { 2205 struct ieee80211_link_data *link = 2206 container_of(work, struct ieee80211_link_data, 2207 u.mgd.csa.switch_work.work); 2208 struct ieee80211_sub_if_data *sdata = link->sdata; 2209 struct ieee80211_local *local = sdata->local; 2210 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2211 int ret; 2212 2213 if (!ieee80211_sdata_running(sdata)) 2214 return; 2215 2216 lockdep_assert_wiphy(local->hw.wiphy); 2217 2218 if (!ifmgd->associated) 2219 return; 2220 2221 if (!link->conf->csa_active) 2222 return; 2223 2224 /* 2225 * If the link isn't active (now), we cannot wait for beacons, won't 2226 * have a reserved chanctx, etc. Just switch over the chandef and 2227 * update cfg80211 directly. 2228 */ 2229 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2230 link->conf->chanreq = link->csa.chanreq; 2231 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2232 link->link_id); 2233 return; 2234 } 2235 2236 /* 2237 * using reservation isn't immediate as it may be deferred until later 2238 * with multi-vif. once reservation is complete it will re-schedule the 2239 * work with no reserved_chanctx so verify chandef to check if it 2240 * completed successfully 2241 */ 2242 2243 if (link->reserved_chanctx) { 2244 /* 2245 * with multi-vif csa driver may call ieee80211_csa_finish() 2246 * many times while waiting for other interfaces to use their 2247 * reservations 2248 */ 2249 if (link->reserved_ready) 2250 return; 2251 2252 ret = ieee80211_link_use_reserved_context(link); 2253 if (ret) { 2254 link_info(link, 2255 "failed to use reserved channel context, disconnecting (err=%d)\n", 2256 ret); 2257 wiphy_work_queue(sdata->local->hw.wiphy, 2258 &ifmgd->csa_connection_drop_work); 2259 } 2260 return; 2261 } 2262 2263 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2264 &link->csa.chanreq)) { 2265 link_info(link, 2266 "failed to finalize channel switch, disconnecting\n"); 2267 wiphy_work_queue(sdata->local->hw.wiphy, 2268 &ifmgd->csa_connection_drop_work); 2269 return; 2270 } 2271 2272 link->u.mgd.csa.waiting_bcn = true; 2273 2274 /* apply new TPE restrictions immediately on the new channel */ 2275 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2276 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2277 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2278 &link->u.mgd.csa.ap_chandef, 2279 &link->conf->chanreq.oper); 2280 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2281 sizeof(link->u.mgd.csa.tpe))) { 2282 link->conf->tpe = link->u.mgd.csa.tpe; 2283 ieee80211_link_info_change_notify(sdata, link, 2284 BSS_CHANGED_TPE); 2285 } 2286 } 2287 2288 ieee80211_sta_reset_beacon_monitor(sdata); 2289 ieee80211_sta_reset_conn_monitor(sdata); 2290 } 2291 2292 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2293 { 2294 struct ieee80211_sub_if_data *sdata = link->sdata; 2295 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2296 int ret; 2297 2298 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2299 2300 WARN_ON(!link->conf->csa_active); 2301 2302 ieee80211_vif_unblock_queues_csa(sdata); 2303 2304 link->conf->csa_active = false; 2305 link->u.mgd.csa.blocked_tx = false; 2306 link->u.mgd.csa.waiting_bcn = false; 2307 2308 ret = drv_post_channel_switch(link); 2309 if (ret) { 2310 link_info(link, 2311 "driver post channel switch failed, disconnecting\n"); 2312 wiphy_work_queue(sdata->local->hw.wiphy, 2313 &ifmgd->csa_connection_drop_work); 2314 return; 2315 } 2316 2317 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2318 link->link_id); 2319 } 2320 2321 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2322 unsigned int link_id) 2323 { 2324 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2325 2326 trace_api_chswitch_done(sdata, success, link_id); 2327 2328 rcu_read_lock(); 2329 2330 if (!success) { 2331 sdata_info(sdata, 2332 "driver channel switch failed (link %d), disconnecting\n", 2333 link_id); 2334 wiphy_work_queue(sdata->local->hw.wiphy, 2335 &sdata->u.mgd.csa_connection_drop_work); 2336 } else { 2337 struct ieee80211_link_data *link = 2338 rcu_dereference(sdata->link[link_id]); 2339 2340 if (WARN_ON(!link)) { 2341 rcu_read_unlock(); 2342 return; 2343 } 2344 2345 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2346 &link->u.mgd.csa.switch_work, 0); 2347 } 2348 2349 rcu_read_unlock(); 2350 } 2351 EXPORT_SYMBOL(ieee80211_chswitch_done); 2352 2353 static void 2354 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2355 { 2356 struct ieee80211_sub_if_data *sdata = link->sdata; 2357 struct ieee80211_local *local = sdata->local; 2358 2359 lockdep_assert_wiphy(local->hw.wiphy); 2360 2361 if (!local->ops->abort_channel_switch) 2362 return; 2363 2364 ieee80211_link_unreserve_chanctx(link); 2365 2366 ieee80211_vif_unblock_queues_csa(sdata); 2367 2368 link->conf->csa_active = false; 2369 link->u.mgd.csa.blocked_tx = false; 2370 2371 drv_abort_channel_switch(link); 2372 } 2373 2374 struct sta_csa_rnr_iter_data { 2375 struct ieee80211_link_data *link; 2376 struct ieee80211_channel *chan; 2377 u8 mld_id; 2378 }; 2379 2380 static enum cfg80211_rnr_iter_ret 2381 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2382 const struct ieee80211_neighbor_ap_info *info, 2383 const u8 *tbtt_info, u8 tbtt_info_len) 2384 { 2385 struct sta_csa_rnr_iter_data *data = _data; 2386 struct ieee80211_link_data *link = data->link; 2387 struct ieee80211_sub_if_data *sdata = link->sdata; 2388 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2389 const struct ieee80211_tbtt_info_ge_11 *ti; 2390 enum nl80211_band band; 2391 unsigned int center_freq; 2392 int link_id; 2393 2394 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2395 return RNR_ITER_CONTINUE; 2396 2397 if (tbtt_info_len < sizeof(*ti)) 2398 return RNR_ITER_CONTINUE; 2399 2400 ti = (const void *)tbtt_info; 2401 2402 if (ti->mld_params.mld_id != data->mld_id) 2403 return RNR_ITER_CONTINUE; 2404 2405 link_id = le16_get_bits(ti->mld_params.params, 2406 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2407 if (link_id != data->link->link_id) 2408 return RNR_ITER_CONTINUE; 2409 2410 /* we found the entry for our link! */ 2411 2412 /* this AP is confused, it had this right before ... just disconnect */ 2413 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2414 link_info(link, 2415 "AP now has invalid operating class in RNR, disconnect\n"); 2416 wiphy_work_queue(sdata->local->hw.wiphy, 2417 &ifmgd->csa_connection_drop_work); 2418 return RNR_ITER_BREAK; 2419 } 2420 2421 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2422 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2423 2424 return RNR_ITER_BREAK; 2425 } 2426 2427 static void 2428 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2429 struct ieee802_11_elems *elems) 2430 { 2431 struct ieee80211_sub_if_data *sdata = link->sdata; 2432 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2433 struct sta_csa_rnr_iter_data data = { 2434 .link = link, 2435 }; 2436 2437 /* 2438 * If we get here, we see a beacon from another link without 2439 * CSA still being reported for it, so now we have to check 2440 * if the CSA was aborted or completed. This may not even be 2441 * perfectly possible if the CSA was only done for changing 2442 * the puncturing, but in that case if the link in inactive 2443 * we don't really care, and if it's an active link (or when 2444 * it's activated later) we'll get a beacon and adjust. 2445 */ 2446 2447 if (WARN_ON(!elems->ml_basic)) 2448 return; 2449 2450 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2451 2452 /* 2453 * So in order to do this, iterate the RNR element(s) and see 2454 * what channel is reported now. 2455 */ 2456 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2457 ieee80211_sta_csa_rnr_iter, &data); 2458 2459 if (!data.chan) { 2460 link_info(link, 2461 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2462 wiphy_work_queue(sdata->local->hw.wiphy, 2463 &ifmgd->csa_connection_drop_work); 2464 return; 2465 } 2466 2467 /* 2468 * If it doesn't match the CSA, then assume it aborted. This 2469 * may erroneously detect that it was _not_ aborted when it 2470 * was in fact aborted, but only changed the bandwidth or the 2471 * puncturing configuration, but we don't have enough data to 2472 * detect that. 2473 */ 2474 if (data.chan != link->csa.chanreq.oper.chan) 2475 ieee80211_sta_abort_chanswitch(link); 2476 } 2477 2478 enum ieee80211_csa_source { 2479 IEEE80211_CSA_SOURCE_BEACON, 2480 IEEE80211_CSA_SOURCE_OTHER_LINK, 2481 IEEE80211_CSA_SOURCE_PROT_ACTION, 2482 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2483 }; 2484 2485 static void 2486 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2487 u64 timestamp, u32 device_timestamp, 2488 struct ieee802_11_elems *full_elems, 2489 struct ieee802_11_elems *csa_elems, 2490 enum ieee80211_csa_source source) 2491 { 2492 struct ieee80211_sub_if_data *sdata = link->sdata; 2493 struct ieee80211_local *local = sdata->local; 2494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2495 struct ieee80211_chanctx *chanctx = NULL; 2496 struct ieee80211_chanctx_conf *conf; 2497 struct ieee80211_csa_ie csa_ie = {}; 2498 struct ieee80211_channel_switch ch_switch = { 2499 .link_id = link->link_id, 2500 .timestamp = timestamp, 2501 .device_timestamp = device_timestamp, 2502 }; 2503 unsigned long now; 2504 int res; 2505 2506 lockdep_assert_wiphy(local->hw.wiphy); 2507 2508 if (csa_elems) { 2509 struct cfg80211_bss *cbss = link->conf->bss; 2510 enum nl80211_band current_band; 2511 struct ieee80211_bss *bss; 2512 2513 if (WARN_ON(!cbss)) 2514 return; 2515 2516 current_band = cbss->channel->band; 2517 bss = (void *)cbss->priv; 2518 2519 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2520 current_band, 2521 bss->vht_cap_info, 2522 &link->u.mgd.conn, 2523 link->u.mgd.bssid, 2524 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2525 &csa_ie); 2526 if (res == 0) { 2527 ch_switch.block_tx = csa_ie.mode; 2528 ch_switch.chandef = csa_ie.chanreq.oper; 2529 ch_switch.count = csa_ie.count; 2530 ch_switch.delay = csa_ie.max_switch_time; 2531 } 2532 2533 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2534 } else { 2535 /* 2536 * If there was no per-STA profile for this link, we 2537 * get called with csa_elems == NULL. This of course means 2538 * there are no CSA elements, so set res=1 indicating 2539 * no more CSA. 2540 */ 2541 res = 1; 2542 } 2543 2544 if (res < 0) { 2545 /* ignore this case, not a protected frame */ 2546 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2547 return; 2548 goto drop_connection; 2549 } 2550 2551 if (link->conf->csa_active) { 2552 switch (source) { 2553 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2554 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2555 /* already processing - disregard action frames */ 2556 return; 2557 case IEEE80211_CSA_SOURCE_BEACON: 2558 if (link->u.mgd.csa.waiting_bcn) { 2559 ieee80211_chswitch_post_beacon(link); 2560 /* 2561 * If the CSA is still present after the switch 2562 * we need to consider it as a new CSA (possibly 2563 * to self). This happens by not returning here 2564 * so we'll get to the check below. 2565 */ 2566 } else if (res) { 2567 ieee80211_sta_abort_chanswitch(link); 2568 return; 2569 } else { 2570 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2571 return; 2572 } 2573 break; 2574 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2575 /* active link: we want to see the beacon to continue */ 2576 if (ieee80211_vif_link_active(&sdata->vif, 2577 link->link_id)) 2578 return; 2579 2580 /* switch work ran, so just complete the process */ 2581 if (link->u.mgd.csa.waiting_bcn) { 2582 ieee80211_chswitch_post_beacon(link); 2583 /* 2584 * If the CSA is still present after the switch 2585 * we need to consider it as a new CSA (possibly 2586 * to self). This happens by not returning here 2587 * so we'll get to the check below. 2588 */ 2589 break; 2590 } 2591 2592 /* link still has CSA but we already know, do nothing */ 2593 if (!res) 2594 return; 2595 2596 /* check in the RNR if the CSA aborted */ 2597 ieee80211_sta_other_link_csa_disappeared(link, 2598 full_elems); 2599 return; 2600 } 2601 } 2602 2603 /* no active CSA nor a new one */ 2604 if (res) { 2605 /* 2606 * However, we may have stopped queues when receiving a public 2607 * action frame that couldn't be protected, if it had the quiet 2608 * bit set. This is a trade-off, we want to be quiet as soon as 2609 * possible, but also don't trust the public action frame much, 2610 * as it can't be protected. 2611 */ 2612 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2613 link->u.mgd.csa.blocked_tx = false; 2614 ieee80211_vif_unblock_queues_csa(sdata); 2615 } 2616 return; 2617 } 2618 2619 /* 2620 * We don't really trust public action frames, but block queues (go to 2621 * quiet mode) for them anyway, we should get a beacon soon to either 2622 * know what the CSA really is, or figure out the public action frame 2623 * was actually an attack. 2624 */ 2625 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2626 if (csa_ie.mode) { 2627 link->u.mgd.csa.blocked_tx = true; 2628 ieee80211_vif_block_queues_csa(sdata); 2629 } 2630 return; 2631 } 2632 2633 if (link->conf->chanreq.oper.chan->band != 2634 csa_ie.chanreq.oper.chan->band) { 2635 link_info(link, 2636 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2637 link->u.mgd.bssid, 2638 csa_ie.chanreq.oper.chan->center_freq, 2639 csa_ie.chanreq.oper.width, 2640 csa_ie.chanreq.oper.center_freq1, 2641 csa_ie.chanreq.oper.center_freq2); 2642 goto drop_connection; 2643 } 2644 2645 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2646 IEEE80211_CHAN_DISABLED)) { 2647 link_info(link, 2648 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2649 link->u.mgd.bssid, 2650 csa_ie.chanreq.oper.chan->center_freq, 2651 csa_ie.chanreq.oper.chan->freq_offset, 2652 csa_ie.chanreq.oper.width, 2653 csa_ie.chanreq.oper.center_freq1, 2654 csa_ie.chanreq.oper.freq1_offset, 2655 csa_ie.chanreq.oper.center_freq2); 2656 goto drop_connection; 2657 } 2658 2659 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2660 &link->conf->chanreq.oper) && 2661 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2662 if (link->u.mgd.csa.ignored_same_chan) 2663 return; 2664 link_info(link, 2665 "AP %pM tries to chanswitch to same channel, ignore\n", 2666 link->u.mgd.bssid); 2667 link->u.mgd.csa.ignored_same_chan = true; 2668 return; 2669 } 2670 2671 /* 2672 * Drop all TDLS peers on the affected link - either we disconnect or 2673 * move to a different channel from this point on. There's no telling 2674 * what our peer will do. 2675 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2676 * have an incompatible wider chandef. 2677 */ 2678 ieee80211_teardown_tdls_peers(link); 2679 2680 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2681 lockdep_is_held(&local->hw.wiphy->mtx)); 2682 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2683 link_info(link, 2684 "no channel context assigned to vif?, disconnecting\n"); 2685 goto drop_connection; 2686 } 2687 2688 if (conf) 2689 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2690 2691 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2692 link_info(link, 2693 "driver doesn't support chan-switch with channel contexts\n"); 2694 goto drop_connection; 2695 } 2696 2697 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2698 link_info(link, 2699 "preparing for channel switch failed, disconnecting\n"); 2700 goto drop_connection; 2701 } 2702 2703 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2704 2705 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2706 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2707 &csa_ie.chanreq.ap); 2708 2709 if (chanctx) { 2710 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2711 chanctx->mode, false); 2712 if (res) { 2713 link_info(link, 2714 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2715 res); 2716 goto drop_connection; 2717 } 2718 } 2719 2720 link->conf->csa_active = true; 2721 link->u.mgd.csa.ignored_same_chan = false; 2722 link->u.mgd.beacon_crc_valid = false; 2723 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2724 2725 if (csa_ie.mode) 2726 ieee80211_vif_block_queues_csa(sdata); 2727 2728 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2729 link->link_id, csa_ie.count, 2730 csa_ie.mode); 2731 2732 /* we may have to handle timeout for deactivated link in software */ 2733 now = jiffies; 2734 link->u.mgd.csa.time = now + 2735 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2736 link->conf->beacon_int); 2737 2738 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 2739 local->ops->channel_switch) { 2740 /* 2741 * Use driver's channel switch callback, the driver will 2742 * later call ieee80211_chswitch_done(). It may deactivate 2743 * the link as well, we handle that elsewhere and queue 2744 * the csa.switch_work for the calculated time then. 2745 */ 2746 drv_channel_switch(local, sdata, &ch_switch); 2747 return; 2748 } 2749 2750 /* channel switch handled in software */ 2751 wiphy_delayed_work_queue(local->hw.wiphy, 2752 &link->u.mgd.csa.switch_work, 2753 link->u.mgd.csa.time - now); 2754 return; 2755 drop_connection: 2756 /* 2757 * This is just so that the disconnect flow will know that 2758 * we were trying to switch channel and failed. In case the 2759 * mode is 1 (we are not allowed to Tx), we will know not to 2760 * send a deauthentication frame. Those two fields will be 2761 * reset when the disconnection worker runs. 2762 */ 2763 link->conf->csa_active = true; 2764 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2765 2766 wiphy_work_queue(sdata->local->hw.wiphy, 2767 &ifmgd->csa_connection_drop_work); 2768 } 2769 2770 struct sta_bss_param_ch_cnt_data { 2771 struct ieee80211_sub_if_data *sdata; 2772 u8 reporting_link_id; 2773 u8 mld_id; 2774 }; 2775 2776 static enum cfg80211_rnr_iter_ret 2777 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 2778 const struct ieee80211_neighbor_ap_info *info, 2779 const u8 *tbtt_info, u8 tbtt_info_len) 2780 { 2781 struct sta_bss_param_ch_cnt_data *data = _data; 2782 struct ieee80211_sub_if_data *sdata = data->sdata; 2783 const struct ieee80211_tbtt_info_ge_11 *ti; 2784 u8 bss_param_ch_cnt; 2785 int link_id; 2786 2787 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2788 return RNR_ITER_CONTINUE; 2789 2790 if (tbtt_info_len < sizeof(*ti)) 2791 return RNR_ITER_CONTINUE; 2792 2793 ti = (const void *)tbtt_info; 2794 2795 if (ti->mld_params.mld_id != data->mld_id) 2796 return RNR_ITER_CONTINUE; 2797 2798 link_id = le16_get_bits(ti->mld_params.params, 2799 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2800 bss_param_ch_cnt = 2801 le16_get_bits(ti->mld_params.params, 2802 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 2803 2804 if (bss_param_ch_cnt != 255 && 2805 link_id < ARRAY_SIZE(sdata->link)) { 2806 struct ieee80211_link_data *link = 2807 sdata_dereference(sdata->link[link_id], sdata); 2808 2809 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 2810 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 2811 link->conf->bss_param_ch_cnt_link_id = 2812 data->reporting_link_id; 2813 } 2814 } 2815 2816 return RNR_ITER_CONTINUE; 2817 } 2818 2819 static void 2820 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 2821 struct ieee80211_bss_conf *bss_conf, 2822 struct ieee802_11_elems *elems) 2823 { 2824 struct sta_bss_param_ch_cnt_data data = { 2825 .reporting_link_id = bss_conf->link_id, 2826 .sdata = sdata, 2827 }; 2828 int bss_param_ch_cnt; 2829 2830 if (!elems->ml_basic) 2831 return; 2832 2833 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2834 2835 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2836 ieee80211_sta_bss_param_ch_cnt_iter, &data); 2837 2838 bss_param_ch_cnt = 2839 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 2840 2841 /* 2842 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 2843 * didn't change to indicate that we got a beacon on our own 2844 * link. 2845 */ 2846 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 2847 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 2848 bss_conf->bss_param_ch_cnt_link_id = 2849 bss_conf->link_id; 2850 } 2851 } 2852 2853 static bool 2854 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 2855 const u8 *country_ie, u8 country_ie_len, 2856 const u8 *pwr_constr_elem, 2857 int *chan_pwr, int *pwr_reduction) 2858 { 2859 struct ieee80211_country_ie_triplet *triplet; 2860 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2861 int i, chan_increment; 2862 bool have_chan_pwr = false; 2863 2864 /* Invalid IE */ 2865 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2866 return false; 2867 2868 triplet = (void *)(country_ie + 3); 2869 country_ie_len -= 3; 2870 2871 switch (channel->band) { 2872 default: 2873 WARN_ON_ONCE(1); 2874 fallthrough; 2875 case NL80211_BAND_2GHZ: 2876 case NL80211_BAND_60GHZ: 2877 case NL80211_BAND_LC: 2878 chan_increment = 1; 2879 break; 2880 case NL80211_BAND_5GHZ: 2881 chan_increment = 4; 2882 break; 2883 case NL80211_BAND_6GHZ: 2884 /* 2885 * In the 6 GHz band, the "maximum transmit power level" 2886 * field in the triplets is reserved, and thus will be 2887 * zero and we shouldn't use it to control TX power. 2888 * The actual TX power will be given in the transmit 2889 * power envelope element instead. 2890 */ 2891 return false; 2892 } 2893 2894 /* find channel */ 2895 while (country_ie_len >= 3) { 2896 u8 first_channel = triplet->chans.first_channel; 2897 2898 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2899 goto next; 2900 2901 for (i = 0; i < triplet->chans.num_channels; i++) { 2902 if (first_channel + i * chan_increment == chan) { 2903 have_chan_pwr = true; 2904 *chan_pwr = triplet->chans.max_power; 2905 break; 2906 } 2907 } 2908 if (have_chan_pwr) 2909 break; 2910 2911 next: 2912 triplet++; 2913 country_ie_len -= 3; 2914 } 2915 2916 if (have_chan_pwr && pwr_constr_elem) 2917 *pwr_reduction = *pwr_constr_elem; 2918 else 2919 *pwr_reduction = 0; 2920 2921 return have_chan_pwr; 2922 } 2923 2924 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 2925 const u8 *cisco_dtpc_ie, 2926 int *pwr_level) 2927 { 2928 /* From practical testing, the first data byte of the DTPC element 2929 * seems to contain the requested dBm level, and the CLI on Cisco 2930 * APs clearly state the range is -127 to 127 dBm, which indicates 2931 * a signed byte, although it seemingly never actually goes negative. 2932 * The other byte seems to always be zero. 2933 */ 2934 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2935 } 2936 2937 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2938 struct ieee80211_channel *channel, 2939 struct ieee80211_mgmt *mgmt, 2940 const u8 *country_ie, u8 country_ie_len, 2941 const u8 *pwr_constr_ie, 2942 const u8 *cisco_dtpc_ie) 2943 { 2944 struct ieee80211_sub_if_data *sdata = link->sdata; 2945 bool has_80211h_pwr = false, has_cisco_pwr = false; 2946 int chan_pwr = 0, pwr_reduction_80211h = 0; 2947 int pwr_level_cisco, pwr_level_80211h; 2948 int new_ap_level; 2949 __le16 capab = mgmt->u.probe_resp.capab_info; 2950 2951 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2952 return 0; /* TODO */ 2953 2954 if (country_ie && 2955 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2956 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2957 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2958 channel, country_ie, country_ie_len, 2959 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2960 pwr_level_80211h = 2961 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2962 } 2963 2964 if (cisco_dtpc_ie) { 2965 ieee80211_find_cisco_dtpc( 2966 channel, cisco_dtpc_ie, &pwr_level_cisco); 2967 has_cisco_pwr = true; 2968 } 2969 2970 if (!has_80211h_pwr && !has_cisco_pwr) 2971 return 0; 2972 2973 /* If we have both 802.11h and Cisco DTPC, apply both limits 2974 * by picking the smallest of the two power levels advertised. 2975 */ 2976 if (has_80211h_pwr && 2977 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2978 new_ap_level = pwr_level_80211h; 2979 2980 if (link->ap_power_level == new_ap_level) 2981 return 0; 2982 2983 sdata_dbg(sdata, 2984 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2985 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2986 link->u.mgd.bssid); 2987 } else { /* has_cisco_pwr is always true here. */ 2988 new_ap_level = pwr_level_cisco; 2989 2990 if (link->ap_power_level == new_ap_level) 2991 return 0; 2992 2993 sdata_dbg(sdata, 2994 "Limiting TX power to %d dBm as advertised by %pM\n", 2995 pwr_level_cisco, link->u.mgd.bssid); 2996 } 2997 2998 link->ap_power_level = new_ap_level; 2999 if (__ieee80211_recalc_txpower(link)) 3000 return BSS_CHANGED_TXPOWER; 3001 return 0; 3002 } 3003 3004 /* powersave */ 3005 static void ieee80211_enable_ps(struct ieee80211_local *local, 3006 struct ieee80211_sub_if_data *sdata) 3007 { 3008 struct ieee80211_conf *conf = &local->hw.conf; 3009 3010 /* 3011 * If we are scanning right now then the parameters will 3012 * take effect when scan finishes. 3013 */ 3014 if (local->scanning) 3015 return; 3016 3017 if (conf->dynamic_ps_timeout > 0 && 3018 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3019 mod_timer(&local->dynamic_ps_timer, jiffies + 3020 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3021 } else { 3022 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3023 ieee80211_send_nullfunc(local, sdata, true); 3024 3025 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3026 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3027 return; 3028 3029 conf->flags |= IEEE80211_CONF_PS; 3030 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3031 } 3032 } 3033 3034 static void ieee80211_change_ps(struct ieee80211_local *local) 3035 { 3036 struct ieee80211_conf *conf = &local->hw.conf; 3037 3038 if (local->ps_sdata) { 3039 ieee80211_enable_ps(local, local->ps_sdata); 3040 } else if (conf->flags & IEEE80211_CONF_PS) { 3041 conf->flags &= ~IEEE80211_CONF_PS; 3042 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3043 del_timer_sync(&local->dynamic_ps_timer); 3044 wiphy_work_cancel(local->hw.wiphy, 3045 &local->dynamic_ps_enable_work); 3046 } 3047 } 3048 3049 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3050 { 3051 struct ieee80211_local *local = sdata->local; 3052 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3053 struct sta_info *sta = NULL; 3054 bool authorized = false; 3055 3056 if (!mgd->powersave) 3057 return false; 3058 3059 if (mgd->broken_ap) 3060 return false; 3061 3062 if (!mgd->associated) 3063 return false; 3064 3065 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3066 return false; 3067 3068 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3069 !sdata->deflink.u.mgd.have_beacon) 3070 return false; 3071 3072 rcu_read_lock(); 3073 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3074 if (sta) 3075 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3076 rcu_read_unlock(); 3077 3078 return authorized; 3079 } 3080 3081 /* need to hold RTNL or interface lock */ 3082 void ieee80211_recalc_ps(struct ieee80211_local *local) 3083 { 3084 struct ieee80211_sub_if_data *sdata, *found = NULL; 3085 int count = 0; 3086 int timeout; 3087 3088 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3089 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3090 local->ps_sdata = NULL; 3091 return; 3092 } 3093 3094 list_for_each_entry(sdata, &local->interfaces, list) { 3095 if (!ieee80211_sdata_running(sdata)) 3096 continue; 3097 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3098 /* If an AP vif is found, then disable PS 3099 * by setting the count to zero thereby setting 3100 * ps_sdata to NULL. 3101 */ 3102 count = 0; 3103 break; 3104 } 3105 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3106 continue; 3107 found = sdata; 3108 count++; 3109 } 3110 3111 if (count == 1 && ieee80211_powersave_allowed(found)) { 3112 u8 dtimper = found->deflink.u.mgd.dtim_period; 3113 3114 timeout = local->dynamic_ps_forced_timeout; 3115 if (timeout < 0) 3116 timeout = 100; 3117 local->hw.conf.dynamic_ps_timeout = timeout; 3118 3119 /* If the TIM IE is invalid, pretend the value is 1 */ 3120 if (!dtimper) 3121 dtimper = 1; 3122 3123 local->hw.conf.ps_dtim_period = dtimper; 3124 local->ps_sdata = found; 3125 } else { 3126 local->ps_sdata = NULL; 3127 } 3128 3129 ieee80211_change_ps(local); 3130 } 3131 3132 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3133 { 3134 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3135 3136 if (sdata->vif.cfg.ps != ps_allowed) { 3137 sdata->vif.cfg.ps = ps_allowed; 3138 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3139 } 3140 } 3141 3142 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3143 struct wiphy_work *work) 3144 { 3145 struct ieee80211_local *local = 3146 container_of(work, struct ieee80211_local, 3147 dynamic_ps_disable_work); 3148 3149 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3150 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3151 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3152 } 3153 3154 ieee80211_wake_queues_by_reason(&local->hw, 3155 IEEE80211_MAX_QUEUE_MAP, 3156 IEEE80211_QUEUE_STOP_REASON_PS, 3157 false); 3158 } 3159 3160 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3161 struct wiphy_work *work) 3162 { 3163 struct ieee80211_local *local = 3164 container_of(work, struct ieee80211_local, 3165 dynamic_ps_enable_work); 3166 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3167 struct ieee80211_if_managed *ifmgd; 3168 unsigned long flags; 3169 int q; 3170 3171 /* can only happen when PS was just disabled anyway */ 3172 if (!sdata) 3173 return; 3174 3175 ifmgd = &sdata->u.mgd; 3176 3177 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3178 return; 3179 3180 if (local->hw.conf.dynamic_ps_timeout > 0) { 3181 /* don't enter PS if TX frames are pending */ 3182 if (drv_tx_frames_pending(local)) { 3183 mod_timer(&local->dynamic_ps_timer, jiffies + 3184 msecs_to_jiffies( 3185 local->hw.conf.dynamic_ps_timeout)); 3186 return; 3187 } 3188 3189 /* 3190 * transmission can be stopped by others which leads to 3191 * dynamic_ps_timer expiry. Postpone the ps timer if it 3192 * is not the actual idle state. 3193 */ 3194 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3195 for (q = 0; q < local->hw.queues; q++) { 3196 if (local->queue_stop_reasons[q]) { 3197 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3198 flags); 3199 mod_timer(&local->dynamic_ps_timer, jiffies + 3200 msecs_to_jiffies( 3201 local->hw.conf.dynamic_ps_timeout)); 3202 return; 3203 } 3204 } 3205 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3206 } 3207 3208 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3209 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3210 if (drv_tx_frames_pending(local)) { 3211 mod_timer(&local->dynamic_ps_timer, jiffies + 3212 msecs_to_jiffies( 3213 local->hw.conf.dynamic_ps_timeout)); 3214 } else { 3215 ieee80211_send_nullfunc(local, sdata, true); 3216 /* Flush to get the tx status of nullfunc frame */ 3217 ieee80211_flush_queues(local, sdata, false); 3218 } 3219 } 3220 3221 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3222 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3223 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3224 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3225 local->hw.conf.flags |= IEEE80211_CONF_PS; 3226 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3227 } 3228 } 3229 3230 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3231 { 3232 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 3233 3234 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3235 } 3236 3237 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3238 { 3239 struct ieee80211_link_data *link = 3240 container_of(work, struct ieee80211_link_data, 3241 dfs_cac_timer_work.work); 3242 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3243 struct ieee80211_sub_if_data *sdata = link->sdata; 3244 3245 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3246 3247 if (sdata->wdev.links[link->link_id].cac_started) { 3248 ieee80211_link_release_channel(link); 3249 cfg80211_cac_event(sdata->dev, &chandef, 3250 NL80211_RADAR_CAC_FINISHED, 3251 GFP_KERNEL, link->link_id); 3252 } 3253 } 3254 3255 static bool 3256 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3257 { 3258 struct ieee80211_local *local = sdata->local; 3259 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3260 bool ret = false; 3261 int ac; 3262 3263 if (local->hw.queues < IEEE80211_NUM_ACS) 3264 return false; 3265 3266 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3267 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3268 int non_acm_ac; 3269 unsigned long now = jiffies; 3270 3271 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3272 tx_tspec->admitted_time && 3273 time_after(now, tx_tspec->time_slice_start + HZ)) { 3274 tx_tspec->consumed_tx_time = 0; 3275 tx_tspec->time_slice_start = now; 3276 3277 if (tx_tspec->downgraded) 3278 tx_tspec->action = 3279 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3280 } 3281 3282 switch (tx_tspec->action) { 3283 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3284 /* take the original parameters */ 3285 if (drv_conf_tx(local, &sdata->deflink, ac, 3286 &sdata->deflink.tx_conf[ac])) 3287 link_err(&sdata->deflink, 3288 "failed to set TX queue parameters for queue %d\n", 3289 ac); 3290 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3291 tx_tspec->downgraded = false; 3292 ret = true; 3293 break; 3294 case TX_TSPEC_ACTION_DOWNGRADE: 3295 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3296 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3297 ret = true; 3298 break; 3299 } 3300 /* downgrade next lower non-ACM AC */ 3301 for (non_acm_ac = ac + 1; 3302 non_acm_ac < IEEE80211_NUM_ACS; 3303 non_acm_ac++) 3304 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3305 break; 3306 /* Usually the loop will result in using BK even if it 3307 * requires admission control, but such a configuration 3308 * makes no sense and we have to transmit somehow - the 3309 * AC selection does the same thing. 3310 * If we started out trying to downgrade from BK, then 3311 * the extra condition here might be needed. 3312 */ 3313 if (non_acm_ac >= IEEE80211_NUM_ACS) 3314 non_acm_ac = IEEE80211_AC_BK; 3315 if (drv_conf_tx(local, &sdata->deflink, ac, 3316 &sdata->deflink.tx_conf[non_acm_ac])) 3317 link_err(&sdata->deflink, 3318 "failed to set TX queue parameters for queue %d\n", 3319 ac); 3320 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3321 ret = true; 3322 wiphy_delayed_work_queue(local->hw.wiphy, 3323 &ifmgd->tx_tspec_wk, 3324 tx_tspec->time_slice_start + 3325 HZ - now + 1); 3326 break; 3327 case TX_TSPEC_ACTION_NONE: 3328 /* nothing now */ 3329 break; 3330 } 3331 } 3332 3333 return ret; 3334 } 3335 3336 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3337 { 3338 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3339 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3340 BSS_CHANGED_QOS); 3341 } 3342 3343 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3344 struct wiphy_work *work) 3345 { 3346 struct ieee80211_sub_if_data *sdata; 3347 3348 sdata = container_of(work, struct ieee80211_sub_if_data, 3349 u.mgd.tx_tspec_wk.work); 3350 ieee80211_sta_handle_tspec_ac_params(sdata); 3351 } 3352 3353 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3354 { 3355 struct ieee80211_sub_if_data *sdata = link->sdata; 3356 struct ieee80211_local *local = sdata->local; 3357 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3358 struct ieee80211_tx_queue_params *params = link->tx_conf; 3359 u8 ac; 3360 3361 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3362 mlme_dbg(sdata, 3363 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3364 ac, params[ac].acm, 3365 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3366 params[ac].txop, params[ac].uapsd, 3367 ifmgd->tx_tspec[ac].downgraded); 3368 if (!ifmgd->tx_tspec[ac].downgraded && 3369 drv_conf_tx(local, link, ac, ¶ms[ac])) 3370 link_err(link, 3371 "failed to set TX queue parameters for AC %d\n", 3372 ac); 3373 } 3374 } 3375 3376 /* MLME */ 3377 static bool 3378 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3379 struct ieee80211_link_data *link, 3380 const u8 *wmm_param, size_t wmm_param_len, 3381 const struct ieee80211_mu_edca_param_set *mu_edca) 3382 { 3383 struct ieee80211_sub_if_data *sdata = link->sdata; 3384 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3386 size_t left; 3387 int count, mu_edca_count, ac; 3388 const u8 *pos; 3389 u8 uapsd_queues = 0; 3390 3391 if (!local->ops->conf_tx) 3392 return false; 3393 3394 if (local->hw.queues < IEEE80211_NUM_ACS) 3395 return false; 3396 3397 if (!wmm_param) 3398 return false; 3399 3400 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3401 return false; 3402 3403 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3404 uapsd_queues = ifmgd->uapsd_queues; 3405 3406 count = wmm_param[6] & 0x0f; 3407 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3408 * if mu_edca was preset before and now it disappeared tell 3409 * the driver about it. 3410 */ 3411 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3412 if (count == link->u.mgd.wmm_last_param_set && 3413 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3414 return false; 3415 link->u.mgd.wmm_last_param_set = count; 3416 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3417 3418 pos = wmm_param + 8; 3419 left = wmm_param_len - 8; 3420 3421 memset(¶ms, 0, sizeof(params)); 3422 3423 sdata->wmm_acm = 0; 3424 for (; left >= 4; left -= 4, pos += 4) { 3425 int aci = (pos[0] >> 5) & 0x03; 3426 int acm = (pos[0] >> 4) & 0x01; 3427 bool uapsd = false; 3428 3429 switch (aci) { 3430 case 1: /* AC_BK */ 3431 ac = IEEE80211_AC_BK; 3432 if (acm) 3433 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3434 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3435 uapsd = true; 3436 params[ac].mu_edca = !!mu_edca; 3437 if (mu_edca) 3438 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3439 break; 3440 case 2: /* AC_VI */ 3441 ac = IEEE80211_AC_VI; 3442 if (acm) 3443 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3444 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3445 uapsd = true; 3446 params[ac].mu_edca = !!mu_edca; 3447 if (mu_edca) 3448 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3449 break; 3450 case 3: /* AC_VO */ 3451 ac = IEEE80211_AC_VO; 3452 if (acm) 3453 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3454 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3455 uapsd = true; 3456 params[ac].mu_edca = !!mu_edca; 3457 if (mu_edca) 3458 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3459 break; 3460 case 0: /* AC_BE */ 3461 default: 3462 ac = IEEE80211_AC_BE; 3463 if (acm) 3464 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3465 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3466 uapsd = true; 3467 params[ac].mu_edca = !!mu_edca; 3468 if (mu_edca) 3469 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3470 break; 3471 } 3472 3473 params[ac].aifs = pos[0] & 0x0f; 3474 3475 if (params[ac].aifs < 2) { 3476 link_info(link, 3477 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3478 params[ac].aifs, aci); 3479 params[ac].aifs = 2; 3480 } 3481 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3482 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3483 params[ac].txop = get_unaligned_le16(pos + 2); 3484 params[ac].acm = acm; 3485 params[ac].uapsd = uapsd; 3486 3487 if (params[ac].cw_min == 0 || 3488 params[ac].cw_min > params[ac].cw_max) { 3489 link_info(link, 3490 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3491 params[ac].cw_min, params[ac].cw_max, aci); 3492 return false; 3493 } 3494 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3495 } 3496 3497 /* WMM specification requires all 4 ACIs. */ 3498 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3499 if (params[ac].cw_min == 0) { 3500 link_info(link, 3501 "AP has invalid WMM params (missing AC %d), using defaults\n", 3502 ac); 3503 return false; 3504 } 3505 } 3506 3507 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3508 link->tx_conf[ac] = params[ac]; 3509 3510 ieee80211_mgd_set_link_qos_params(link); 3511 3512 /* enable WMM or activate new settings */ 3513 link->conf->qos = true; 3514 return true; 3515 } 3516 3517 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3518 { 3519 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3520 3521 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3522 ieee80211_run_deferred_scan(sdata->local); 3523 } 3524 3525 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3526 { 3527 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3528 3529 __ieee80211_stop_poll(sdata); 3530 } 3531 3532 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3533 u16 capab, bool erp_valid, u8 erp) 3534 { 3535 struct ieee80211_bss_conf *bss_conf = link->conf; 3536 struct ieee80211_supported_band *sband; 3537 u64 changed = 0; 3538 bool use_protection; 3539 bool use_short_preamble; 3540 bool use_short_slot; 3541 3542 sband = ieee80211_get_link_sband(link); 3543 if (!sband) 3544 return changed; 3545 3546 if (erp_valid) { 3547 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3548 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3549 } else { 3550 use_protection = false; 3551 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3552 } 3553 3554 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3555 if (sband->band == NL80211_BAND_5GHZ || 3556 sband->band == NL80211_BAND_6GHZ) 3557 use_short_slot = true; 3558 3559 if (use_protection != bss_conf->use_cts_prot) { 3560 bss_conf->use_cts_prot = use_protection; 3561 changed |= BSS_CHANGED_ERP_CTS_PROT; 3562 } 3563 3564 if (use_short_preamble != bss_conf->use_short_preamble) { 3565 bss_conf->use_short_preamble = use_short_preamble; 3566 changed |= BSS_CHANGED_ERP_PREAMBLE; 3567 } 3568 3569 if (use_short_slot != bss_conf->use_short_slot) { 3570 bss_conf->use_short_slot = use_short_slot; 3571 changed |= BSS_CHANGED_ERP_SLOT; 3572 } 3573 3574 return changed; 3575 } 3576 3577 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3578 struct cfg80211_bss *cbss) 3579 { 3580 struct ieee80211_sub_if_data *sdata = link->sdata; 3581 struct ieee80211_bss_conf *bss_conf = link->conf; 3582 struct ieee80211_bss *bss = (void *)cbss->priv; 3583 u64 changed = BSS_CHANGED_QOS; 3584 3585 /* not really used in MLO */ 3586 sdata->u.mgd.beacon_timeout = 3587 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3588 bss_conf->beacon_int)); 3589 3590 changed |= ieee80211_handle_bss_capability(link, 3591 bss_conf->assoc_capability, 3592 bss->has_erp_value, 3593 bss->erp_value); 3594 3595 ieee80211_check_rate_mask(link); 3596 3597 link->conf->bss = cbss; 3598 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3599 3600 if (sdata->vif.p2p || 3601 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3602 const struct cfg80211_bss_ies *ies; 3603 3604 rcu_read_lock(); 3605 ies = rcu_dereference(cbss->ies); 3606 if (ies) { 3607 int ret; 3608 3609 ret = cfg80211_get_p2p_attr( 3610 ies->data, ies->len, 3611 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3612 (u8 *) &bss_conf->p2p_noa_attr, 3613 sizeof(bss_conf->p2p_noa_attr)); 3614 if (ret >= 2) { 3615 link->u.mgd.p2p_noa_index = 3616 bss_conf->p2p_noa_attr.index; 3617 changed |= BSS_CHANGED_P2P_PS; 3618 } 3619 } 3620 rcu_read_unlock(); 3621 } 3622 3623 if (link->u.mgd.have_beacon) { 3624 bss_conf->beacon_rate = bss->beacon_rate; 3625 changed |= BSS_CHANGED_BEACON_INFO; 3626 } else { 3627 bss_conf->beacon_rate = NULL; 3628 } 3629 3630 /* Tell the driver to monitor connection quality (if supported) */ 3631 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3632 bss_conf->cqm_rssi_thold) 3633 changed |= BSS_CHANGED_CQM; 3634 3635 return changed; 3636 } 3637 3638 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3639 struct ieee80211_mgd_assoc_data *assoc_data, 3640 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3641 { 3642 struct ieee80211_local *local = sdata->local; 3643 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3644 u64 vif_changed = BSS_CHANGED_ASSOC; 3645 unsigned int link_id; 3646 3647 lockdep_assert_wiphy(local->hw.wiphy); 3648 3649 sdata->u.mgd.associated = true; 3650 3651 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3652 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3653 struct ieee80211_link_data *link; 3654 3655 if (!cbss || 3656 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3657 continue; 3658 3659 if (ieee80211_vif_is_mld(&sdata->vif) && 3660 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3661 continue; 3662 3663 link = sdata_dereference(sdata->link[link_id], sdata); 3664 if (WARN_ON(!link)) 3665 return; 3666 3667 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3668 } 3669 3670 /* just to be sure */ 3671 ieee80211_stop_poll(sdata); 3672 3673 ieee80211_led_assoc(local, 1); 3674 3675 vif_cfg->assoc = 1; 3676 3677 /* Enable ARP filtering */ 3678 if (vif_cfg->arp_addr_cnt) 3679 vif_changed |= BSS_CHANGED_ARP_FILTER; 3680 3681 if (ieee80211_vif_is_mld(&sdata->vif)) { 3682 for (link_id = 0; 3683 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3684 link_id++) { 3685 struct ieee80211_link_data *link; 3686 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3687 3688 if (!cbss || 3689 !(BIT(link_id) & 3690 ieee80211_vif_usable_links(&sdata->vif)) || 3691 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3692 continue; 3693 3694 link = sdata_dereference(sdata->link[link_id], sdata); 3695 if (WARN_ON(!link)) 3696 return; 3697 3698 ieee80211_link_info_change_notify(sdata, link, 3699 changed[link_id]); 3700 3701 ieee80211_recalc_smps(sdata, link); 3702 } 3703 3704 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3705 } else { 3706 ieee80211_bss_info_change_notify(sdata, 3707 vif_changed | changed[0]); 3708 } 3709 3710 ieee80211_recalc_ps(local); 3711 3712 /* leave this here to not change ordering in non-MLO cases */ 3713 if (!ieee80211_vif_is_mld(&sdata->vif)) 3714 ieee80211_recalc_smps(sdata, &sdata->deflink); 3715 ieee80211_recalc_ps_vif(sdata); 3716 3717 netif_carrier_on(sdata->dev); 3718 } 3719 3720 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 3721 { 3722 struct ieee80211_mgd_assoc_data *add_links_data = 3723 sdata->u.mgd.reconf.add_links_data; 3724 3725 if (!ieee80211_vif_is_mld(&sdata->vif) || 3726 !(sdata->u.mgd.reconf.added_links | 3727 sdata->u.mgd.reconf.removed_links)) 3728 return; 3729 3730 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3731 &sdata->u.mgd.reconf.wk); 3732 sdata->u.mgd.reconf.added_links = 0; 3733 sdata->u.mgd.reconf.removed_links = 0; 3734 sdata->u.mgd.reconf.dialog_token = 0; 3735 3736 if (add_links_data) { 3737 struct cfg80211_mlo_reconf_done_data done_data = {}; 3738 u8 link_id; 3739 3740 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3741 link_id++) 3742 done_data.links[link_id].bss = 3743 add_links_data->link[link_id].bss; 3744 3745 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 3746 3747 kfree(sdata->u.mgd.reconf.add_links_data); 3748 sdata->u.mgd.reconf.add_links_data = NULL; 3749 } 3750 } 3751 3752 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3753 u16 stype, u16 reason, bool tx, 3754 u8 *frame_buf) 3755 { 3756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3757 struct ieee80211_local *local = sdata->local; 3758 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3759 unsigned int link_id; 3760 u64 changed = 0; 3761 struct ieee80211_prep_tx_info info = { 3762 .subtype = stype, 3763 .was_assoc = true, 3764 .link_id = ffs(sdata->vif.active_links) - 1, 3765 }; 3766 3767 lockdep_assert_wiphy(local->hw.wiphy); 3768 3769 if (WARN_ON(!ap_sta)) 3770 return; 3771 3772 if (WARN_ON_ONCE(tx && !frame_buf)) 3773 return; 3774 3775 if (WARN_ON(!ifmgd->associated)) 3776 return; 3777 3778 ieee80211_stop_poll(sdata); 3779 3780 ifmgd->associated = false; 3781 3782 /* other links will be destroyed */ 3783 sdata->deflink.conf->bss = NULL; 3784 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 3785 3786 netif_carrier_off(sdata->dev); 3787 3788 /* 3789 * if we want to get out of ps before disassoc (why?) we have 3790 * to do it before sending disassoc, as otherwise the null-packet 3791 * won't be valid. 3792 */ 3793 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3794 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3795 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3796 } 3797 local->ps_sdata = NULL; 3798 3799 /* disable per-vif ps */ 3800 ieee80211_recalc_ps_vif(sdata); 3801 3802 /* make sure ongoing transmission finishes */ 3803 synchronize_net(); 3804 3805 /* 3806 * drop any frame before deauth/disassoc, this can be data or 3807 * management frame. Since we are disconnecting, we should not 3808 * insist sending these frames which can take time and delay 3809 * the disconnection and possible the roaming. 3810 */ 3811 if (tx) 3812 ieee80211_flush_queues(local, sdata, true); 3813 3814 /* deauthenticate/disassociate now */ 3815 if (tx || frame_buf) { 3816 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3817 3818 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 3819 sdata->vif.cfg.ap_addr, stype, 3820 reason, tx, frame_buf); 3821 } 3822 3823 /* flush out frame - make sure the deauth was actually sent */ 3824 if (tx) 3825 ieee80211_flush_queues(local, sdata, false); 3826 3827 drv_mgd_complete_tx(sdata->local, sdata, &info); 3828 3829 /* clear AP addr only after building the needed mgmt frames */ 3830 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3831 eth_zero_addr(sdata->vif.cfg.ap_addr); 3832 3833 sdata->vif.cfg.ssid_len = 0; 3834 3835 /* Remove TDLS peers */ 3836 __sta_info_flush(sdata, false, -1, ap_sta); 3837 3838 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 3839 /* Only move the AP state */ 3840 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 3841 } else { 3842 /* Remove AP peer */ 3843 sta_info_flush(sdata, -1); 3844 } 3845 3846 /* finally reset all BSS / config parameters */ 3847 if (!ieee80211_vif_is_mld(&sdata->vif)) 3848 changed |= ieee80211_reset_erp_info(sdata); 3849 3850 ieee80211_led_assoc(local, 0); 3851 changed |= BSS_CHANGED_ASSOC; 3852 sdata->vif.cfg.assoc = false; 3853 3854 sdata->deflink.u.mgd.p2p_noa_index = -1; 3855 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 3856 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 3857 3858 /* on the next assoc, re-program HT/VHT parameters */ 3859 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 3860 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 3861 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 3862 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 3863 3864 /* 3865 * reset MU-MIMO ownership and group data in default link, 3866 * if used, other links are destroyed 3867 */ 3868 memset(sdata->vif.bss_conf.mu_group.membership, 0, 3869 sizeof(sdata->vif.bss_conf.mu_group.membership)); 3870 memset(sdata->vif.bss_conf.mu_group.position, 0, 3871 sizeof(sdata->vif.bss_conf.mu_group.position)); 3872 if (!ieee80211_vif_is_mld(&sdata->vif)) 3873 changed |= BSS_CHANGED_MU_GROUPS; 3874 sdata->vif.bss_conf.mu_mimo_owner = false; 3875 3876 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3877 3878 del_timer_sync(&local->dynamic_ps_timer); 3879 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 3880 3881 /* Disable ARP filtering */ 3882 if (sdata->vif.cfg.arp_addr_cnt) 3883 changed |= BSS_CHANGED_ARP_FILTER; 3884 3885 sdata->vif.bss_conf.qos = false; 3886 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3887 changed |= BSS_CHANGED_QOS; 3888 /* The BSSID (not really interesting) and HT changed */ 3889 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3890 ieee80211_bss_info_change_notify(sdata, changed); 3891 } else { 3892 ieee80211_vif_cfg_change_notify(sdata, changed); 3893 } 3894 3895 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 3896 /* 3897 * After notifying the driver about the disassoc, 3898 * remove the ap sta. 3899 */ 3900 sta_info_flush(sdata, -1); 3901 } 3902 3903 /* disassociated - set to defaults now */ 3904 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3905 3906 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3907 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3908 del_timer_sync(&sdata->u.mgd.timer); 3909 3910 sdata->vif.bss_conf.dtim_period = 0; 3911 sdata->vif.bss_conf.beacon_rate = NULL; 3912 3913 sdata->deflink.u.mgd.have_beacon = false; 3914 sdata->deflink.u.mgd.tracking_signal_avg = false; 3915 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3916 3917 ifmgd->flags = 0; 3918 3919 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3920 struct ieee80211_link_data *link; 3921 3922 link = sdata_dereference(sdata->link[link_id], sdata); 3923 if (!link) 3924 continue; 3925 ieee80211_link_release_channel(link); 3926 } 3927 3928 sdata->vif.bss_conf.csa_active = false; 3929 sdata->deflink.u.mgd.csa.blocked_tx = false; 3930 sdata->deflink.u.mgd.csa.waiting_bcn = false; 3931 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 3932 ieee80211_vif_unblock_queues_csa(sdata); 3933 3934 /* existing TX TSPEC sessions no longer exist */ 3935 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3936 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 3937 3938 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 3939 sdata->vif.bss_conf.pwr_reduction = 0; 3940 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 3941 3942 sdata->vif.cfg.eml_cap = 0; 3943 sdata->vif.cfg.eml_med_sync_delay = 0; 3944 sdata->vif.cfg.mld_capa_op = 0; 3945 3946 memset(&sdata->u.mgd.ttlm_info, 0, 3947 sizeof(sdata->u.mgd.ttlm_info)); 3948 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 3949 3950 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 3951 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3952 &ifmgd->neg_ttlm_timeout_work); 3953 3954 sdata->u.mgd.removed_links = 0; 3955 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3956 &sdata->u.mgd.ml_reconf_work); 3957 3958 wiphy_work_cancel(sdata->local->hw.wiphy, 3959 &ifmgd->teardown_ttlm_work); 3960 3961 ieee80211_vif_set_links(sdata, 0, 0); 3962 3963 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 3964 3965 /* if disconnection happens in the middle of the ML reconfiguration 3966 * flow, cfg80211 must called to release the BSS references obtained 3967 * when the flow started. 3968 */ 3969 ieee80211_ml_reconf_reset(sdata); 3970 } 3971 3972 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3973 { 3974 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3975 struct ieee80211_local *local = sdata->local; 3976 3977 lockdep_assert_wiphy(local->hw.wiphy); 3978 3979 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3980 return; 3981 3982 __ieee80211_stop_poll(sdata); 3983 3984 ieee80211_recalc_ps(local); 3985 3986 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3987 return; 3988 3989 /* 3990 * We've received a probe response, but are not sure whether 3991 * we have or will be receiving any beacons or data, so let's 3992 * schedule the timers again, just in case. 3993 */ 3994 ieee80211_sta_reset_beacon_monitor(sdata); 3995 3996 mod_timer(&ifmgd->conn_mon_timer, 3997 round_jiffies_up(jiffies + 3998 IEEE80211_CONNECTION_IDLE_TIME)); 3999 } 4000 4001 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4002 struct ieee80211_hdr *hdr, 4003 u16 tx_time) 4004 { 4005 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4006 u16 tid; 4007 int ac; 4008 struct ieee80211_sta_tx_tspec *tx_tspec; 4009 unsigned long now = jiffies; 4010 4011 if (!ieee80211_is_data_qos(hdr->frame_control)) 4012 return; 4013 4014 tid = ieee80211_get_tid(hdr); 4015 ac = ieee80211_ac_from_tid(tid); 4016 tx_tspec = &ifmgd->tx_tspec[ac]; 4017 4018 if (likely(!tx_tspec->admitted_time)) 4019 return; 4020 4021 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4022 tx_tspec->consumed_tx_time = 0; 4023 tx_tspec->time_slice_start = now; 4024 4025 if (tx_tspec->downgraded) { 4026 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4027 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4028 &ifmgd->tx_tspec_wk, 0); 4029 } 4030 } 4031 4032 if (tx_tspec->downgraded) 4033 return; 4034 4035 tx_tspec->consumed_tx_time += tx_time; 4036 4037 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4038 tx_tspec->downgraded = true; 4039 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4040 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4041 &ifmgd->tx_tspec_wk, 0); 4042 } 4043 } 4044 4045 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4046 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4047 { 4048 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4049 4050 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4051 !sdata->u.mgd.probe_send_count) 4052 return; 4053 4054 if (ack) 4055 sdata->u.mgd.probe_send_count = 0; 4056 else 4057 sdata->u.mgd.nullfunc_failed = true; 4058 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4059 } 4060 4061 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4062 const u8 *src, const u8 *dst, 4063 const u8 *ssid, size_t ssid_len, 4064 struct ieee80211_channel *channel) 4065 { 4066 struct sk_buff *skb; 4067 4068 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4069 ssid, ssid_len, NULL, 0, 4070 IEEE80211_PROBE_FLAG_DIRECTED); 4071 if (skb) 4072 ieee80211_tx_skb(sdata, skb); 4073 } 4074 4075 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4076 { 4077 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4078 u8 *dst = sdata->vif.cfg.ap_addr; 4079 u8 unicast_limit = max(1, max_probe_tries - 3); 4080 struct sta_info *sta; 4081 4082 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4083 4084 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 4085 return; 4086 4087 /* 4088 * Try sending broadcast probe requests for the last three 4089 * probe requests after the first ones failed since some 4090 * buggy APs only support broadcast probe requests. 4091 */ 4092 if (ifmgd->probe_send_count >= unicast_limit) 4093 dst = NULL; 4094 4095 /* 4096 * When the hardware reports an accurate Tx ACK status, it's 4097 * better to send a nullfunc frame instead of a probe request, 4098 * as it will kick us off the AP quickly if we aren't associated 4099 * anymore. The timeout will be reset if the frame is ACKed by 4100 * the AP. 4101 */ 4102 ifmgd->probe_send_count++; 4103 4104 if (dst) { 4105 sta = sta_info_get(sdata, dst); 4106 if (!WARN_ON(!sta)) 4107 ieee80211_check_fast_rx(sta); 4108 } 4109 4110 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4111 ifmgd->nullfunc_failed = false; 4112 ieee80211_send_nullfunc(sdata->local, sdata, false); 4113 } else { 4114 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4115 sdata->vif.cfg.ssid, 4116 sdata->vif.cfg.ssid_len, 4117 sdata->deflink.conf->bss->channel); 4118 } 4119 4120 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4121 run_again(sdata, ifmgd->probe_timeout); 4122 } 4123 4124 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4125 bool beacon) 4126 { 4127 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4128 bool already = false; 4129 4130 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4131 4132 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 4133 return; 4134 4135 if (!ieee80211_sdata_running(sdata)) 4136 return; 4137 4138 if (!ifmgd->associated) 4139 return; 4140 4141 if (sdata->local->tmp_channel || sdata->local->scanning) 4142 return; 4143 4144 if (sdata->local->suspending) { 4145 /* reschedule after resume */ 4146 ieee80211_reset_ap_probe(sdata); 4147 return; 4148 } 4149 4150 if (beacon) { 4151 mlme_dbg_ratelimited(sdata, 4152 "detected beacon loss from AP (missed %d beacons) - probing\n", 4153 beacon_loss_count); 4154 4155 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4156 } 4157 4158 /* 4159 * The driver/our work has already reported this event or the 4160 * connection monitoring has kicked in and we have already sent 4161 * a probe request. Or maybe the AP died and the driver keeps 4162 * reporting until we disassociate... 4163 * 4164 * In either case we have to ignore the current call to this 4165 * function (except for setting the correct probe reason bit) 4166 * because otherwise we would reset the timer every time and 4167 * never check whether we received a probe response! 4168 */ 4169 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4170 already = true; 4171 4172 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4173 4174 if (already) 4175 return; 4176 4177 ieee80211_recalc_ps(sdata->local); 4178 4179 ifmgd->probe_send_count = 0; 4180 ieee80211_mgd_probe_ap_send(sdata); 4181 } 4182 4183 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4184 struct ieee80211_vif *vif) 4185 { 4186 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4187 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4188 struct cfg80211_bss *cbss; 4189 struct sk_buff *skb; 4190 const struct element *ssid; 4191 int ssid_len; 4192 4193 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4194 4195 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4196 ieee80211_vif_is_mld(&sdata->vif))) 4197 return NULL; 4198 4199 if (ifmgd->associated) 4200 cbss = sdata->deflink.conf->bss; 4201 else if (ifmgd->auth_data) 4202 cbss = ifmgd->auth_data->bss; 4203 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4204 cbss = ifmgd->assoc_data->link[0].bss; 4205 else 4206 return NULL; 4207 4208 rcu_read_lock(); 4209 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4210 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4211 "invalid SSID element (len=%d)", 4212 ssid ? ssid->datalen : -1)) 4213 ssid_len = 0; 4214 else 4215 ssid_len = ssid->datalen; 4216 4217 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4218 (u32) -1, cbss->channel, 4219 ssid->data, ssid_len, 4220 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4221 rcu_read_unlock(); 4222 4223 return skb; 4224 } 4225 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4226 4227 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4228 const u8 *buf, size_t len, bool tx, 4229 u16 reason, bool reconnect) 4230 { 4231 struct ieee80211_event event = { 4232 .type = MLME_EVENT, 4233 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4234 .u.mlme.reason = reason, 4235 }; 4236 4237 if (tx) 4238 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4239 else 4240 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4241 4242 drv_event_callback(sdata->local, sdata, &event); 4243 } 4244 4245 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4246 { 4247 struct ieee80211_local *local = sdata->local; 4248 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4249 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4250 bool tx = false; 4251 4252 lockdep_assert_wiphy(local->hw.wiphy); 4253 4254 if (!ifmgd->associated) 4255 return; 4256 4257 /* only transmit if we have a link that makes that worthwhile */ 4258 for (unsigned int link_id = 0; 4259 link_id < ARRAY_SIZE(sdata->link); 4260 link_id++) { 4261 struct ieee80211_link_data *link; 4262 4263 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4264 continue; 4265 4266 link = sdata_dereference(sdata->link[link_id], sdata); 4267 if (WARN_ON_ONCE(!link)) 4268 continue; 4269 4270 if (link->u.mgd.csa.blocked_tx) 4271 continue; 4272 4273 tx = true; 4274 break; 4275 } 4276 4277 if (!ifmgd->driver_disconnect) { 4278 unsigned int link_id; 4279 4280 /* 4281 * AP is probably out of range (or not reachable for another 4282 * reason) so remove the bss structs for that AP. In the case 4283 * of multi-link, it's not clear that all of them really are 4284 * out of range, but if they weren't the driver likely would 4285 * have switched to just have a single link active? 4286 */ 4287 for (link_id = 0; 4288 link_id < ARRAY_SIZE(sdata->link); 4289 link_id++) { 4290 struct ieee80211_link_data *link; 4291 4292 link = sdata_dereference(sdata->link[link_id], sdata); 4293 if (!link) 4294 continue; 4295 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4296 link->conf->bss = NULL; 4297 } 4298 } 4299 4300 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4301 ifmgd->driver_disconnect ? 4302 WLAN_REASON_DEAUTH_LEAVING : 4303 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4304 tx, frame_buf); 4305 /* the other links will be destroyed */ 4306 sdata->vif.bss_conf.csa_active = false; 4307 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4308 sdata->deflink.u.mgd.csa.blocked_tx = false; 4309 ieee80211_vif_unblock_queues_csa(sdata); 4310 4311 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 4312 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4313 ifmgd->reconnect); 4314 ifmgd->reconnect = false; 4315 } 4316 4317 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4318 struct wiphy_work *work) 4319 { 4320 struct ieee80211_sub_if_data *sdata = 4321 container_of(work, struct ieee80211_sub_if_data, 4322 u.mgd.beacon_connection_loss_work); 4323 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4324 4325 if (ifmgd->connection_loss) { 4326 sdata_info(sdata, "Connection to AP %pM lost\n", 4327 sdata->vif.cfg.ap_addr); 4328 __ieee80211_disconnect(sdata); 4329 ifmgd->connection_loss = false; 4330 } else if (ifmgd->driver_disconnect) { 4331 sdata_info(sdata, 4332 "Driver requested disconnection from AP %pM\n", 4333 sdata->vif.cfg.ap_addr); 4334 __ieee80211_disconnect(sdata); 4335 ifmgd->driver_disconnect = false; 4336 } else { 4337 if (ifmgd->associated) 4338 sdata->deflink.u.mgd.beacon_loss_count++; 4339 ieee80211_mgd_probe_ap(sdata, true); 4340 } 4341 } 4342 4343 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4344 struct wiphy_work *work) 4345 { 4346 struct ieee80211_sub_if_data *sdata = 4347 container_of(work, struct ieee80211_sub_if_data, 4348 u.mgd.csa_connection_drop_work); 4349 4350 __ieee80211_disconnect(sdata); 4351 } 4352 4353 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4354 { 4355 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4356 struct ieee80211_hw *hw = &sdata->local->hw; 4357 4358 trace_api_beacon_loss(sdata); 4359 4360 sdata->u.mgd.connection_loss = false; 4361 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4362 } 4363 EXPORT_SYMBOL(ieee80211_beacon_loss); 4364 4365 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4366 { 4367 struct ieee80211_sub_if_data *sdata; 4368 struct ieee80211_hw *hw; 4369 4370 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4371 4372 sdata = vif_to_sdata(vif); 4373 hw = &sdata->local->hw; 4374 4375 trace_api_connection_loss(sdata); 4376 4377 sdata->u.mgd.connection_loss = true; 4378 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4379 } 4380 EXPORT_SYMBOL(ieee80211_connection_loss); 4381 4382 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4383 { 4384 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4385 struct ieee80211_hw *hw = &sdata->local->hw; 4386 4387 trace_api_disconnect(sdata, reconnect); 4388 4389 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4390 return; 4391 4392 sdata->u.mgd.driver_disconnect = true; 4393 sdata->u.mgd.reconnect = reconnect; 4394 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4395 } 4396 EXPORT_SYMBOL(ieee80211_disconnect); 4397 4398 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4399 bool assoc) 4400 { 4401 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4402 4403 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4404 4405 sdata->u.mgd.auth_data = NULL; 4406 4407 if (!assoc) { 4408 /* 4409 * we are not authenticated yet, the only timer that could be 4410 * running is the timeout for the authentication response which 4411 * which is not relevant anymore. 4412 */ 4413 del_timer_sync(&sdata->u.mgd.timer); 4414 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4415 4416 /* other links are destroyed */ 4417 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4418 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4419 BSS_CHANGED_BSSID); 4420 sdata->u.mgd.flags = 0; 4421 4422 ieee80211_link_release_channel(&sdata->deflink); 4423 ieee80211_vif_set_links(sdata, 0, 0); 4424 } 4425 4426 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4427 kfree(auth_data); 4428 } 4429 4430 enum assoc_status { 4431 ASSOC_SUCCESS, 4432 ASSOC_REJECTED, 4433 ASSOC_TIMEOUT, 4434 ASSOC_ABANDON, 4435 }; 4436 4437 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4438 enum assoc_status status) 4439 { 4440 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4441 4442 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4443 4444 sdata->u.mgd.assoc_data = NULL; 4445 4446 if (status != ASSOC_SUCCESS) { 4447 /* 4448 * we are not associated yet, the only timer that could be 4449 * running is the timeout for the association response which 4450 * which is not relevant anymore. 4451 */ 4452 del_timer_sync(&sdata->u.mgd.timer); 4453 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4454 4455 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4456 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4457 BSS_CHANGED_BSSID); 4458 sdata->u.mgd.flags = 0; 4459 sdata->vif.bss_conf.mu_mimo_owner = false; 4460 4461 if (status != ASSOC_REJECTED) { 4462 struct cfg80211_assoc_failure data = { 4463 .timeout = status == ASSOC_TIMEOUT, 4464 }; 4465 int i; 4466 4467 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4468 ARRAY_SIZE(assoc_data->link)); 4469 4470 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4471 data.bss[i] = assoc_data->link[i].bss; 4472 4473 if (ieee80211_vif_is_mld(&sdata->vif)) 4474 data.ap_mld_addr = assoc_data->ap_addr; 4475 4476 cfg80211_assoc_failure(sdata->dev, &data); 4477 } 4478 4479 ieee80211_link_release_channel(&sdata->deflink); 4480 ieee80211_vif_set_links(sdata, 0, 0); 4481 } 4482 4483 kfree(assoc_data); 4484 } 4485 4486 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4487 struct ieee80211_mgmt *mgmt, size_t len) 4488 { 4489 struct ieee80211_local *local = sdata->local; 4490 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4491 const struct element *challenge; 4492 u8 *pos; 4493 u32 tx_flags = 0; 4494 struct ieee80211_prep_tx_info info = { 4495 .subtype = IEEE80211_STYPE_AUTH, 4496 .link_id = auth_data->link_id, 4497 }; 4498 4499 pos = mgmt->u.auth.variable; 4500 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4501 len - (pos - (u8 *)mgmt)); 4502 if (!challenge) 4503 return; 4504 auth_data->expected_transaction = 4; 4505 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4506 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4507 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4508 IEEE80211_TX_INTFL_MLME_CONN_TX; 4509 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4510 (void *)challenge, 4511 challenge->datalen + sizeof(*challenge), 4512 auth_data->ap_addr, auth_data->ap_addr, 4513 auth_data->key, auth_data->key_len, 4514 auth_data->key_idx, tx_flags); 4515 } 4516 4517 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4518 { 4519 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4520 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4521 struct sta_info *sta; 4522 4523 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4524 4525 sdata_info(sdata, "authenticated\n"); 4526 ifmgd->auth_data->done = true; 4527 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4528 ifmgd->auth_data->timeout_started = true; 4529 run_again(sdata, ifmgd->auth_data->timeout); 4530 4531 /* move station state to auth */ 4532 sta = sta_info_get(sdata, ap_addr); 4533 if (!sta) { 4534 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4535 return false; 4536 } 4537 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4538 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4539 return false; 4540 } 4541 4542 return true; 4543 } 4544 4545 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4546 struct ieee80211_mgmt *mgmt, size_t len) 4547 { 4548 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4549 u16 auth_alg, auth_transaction, status_code; 4550 struct ieee80211_event event = { 4551 .type = MLME_EVENT, 4552 .u.mlme.data = AUTH_EVENT, 4553 }; 4554 struct ieee80211_prep_tx_info info = { 4555 .subtype = IEEE80211_STYPE_AUTH, 4556 }; 4557 4558 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4559 4560 if (len < 24 + 6) 4561 return; 4562 4563 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4564 return; 4565 4566 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4567 return; 4568 4569 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4570 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4571 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4572 4573 if (auth_alg != ifmgd->auth_data->algorithm || 4574 (auth_alg != WLAN_AUTH_SAE && 4575 auth_transaction != ifmgd->auth_data->expected_transaction) || 4576 (auth_alg == WLAN_AUTH_SAE && 4577 (auth_transaction < ifmgd->auth_data->expected_transaction || 4578 auth_transaction > 2))) { 4579 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4580 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4581 auth_transaction, 4582 ifmgd->auth_data->expected_transaction); 4583 goto notify_driver; 4584 } 4585 4586 if (status_code != WLAN_STATUS_SUCCESS) { 4587 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4588 4589 if (auth_alg == WLAN_AUTH_SAE && 4590 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4591 (auth_transaction == 1 && 4592 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4593 status_code == WLAN_STATUS_SAE_PK)))) { 4594 /* waiting for userspace now */ 4595 ifmgd->auth_data->waiting = true; 4596 ifmgd->auth_data->timeout = 4597 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4598 ifmgd->auth_data->timeout_started = true; 4599 run_again(sdata, ifmgd->auth_data->timeout); 4600 goto notify_driver; 4601 } 4602 4603 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4604 mgmt->sa, status_code); 4605 ieee80211_destroy_auth_data(sdata, false); 4606 event.u.mlme.status = MLME_DENIED; 4607 event.u.mlme.reason = status_code; 4608 drv_event_callback(sdata->local, sdata, &event); 4609 goto notify_driver; 4610 } 4611 4612 switch (ifmgd->auth_data->algorithm) { 4613 case WLAN_AUTH_OPEN: 4614 case WLAN_AUTH_LEAP: 4615 case WLAN_AUTH_FT: 4616 case WLAN_AUTH_SAE: 4617 case WLAN_AUTH_FILS_SK: 4618 case WLAN_AUTH_FILS_SK_PFS: 4619 case WLAN_AUTH_FILS_PK: 4620 break; 4621 case WLAN_AUTH_SHARED_KEY: 4622 if (ifmgd->auth_data->expected_transaction != 4) { 4623 ieee80211_auth_challenge(sdata, mgmt, len); 4624 /* need another frame */ 4625 return; 4626 } 4627 break; 4628 default: 4629 WARN_ONCE(1, "invalid auth alg %d", 4630 ifmgd->auth_data->algorithm); 4631 goto notify_driver; 4632 } 4633 4634 event.u.mlme.status = MLME_SUCCESS; 4635 info.success = 1; 4636 drv_event_callback(sdata->local, sdata, &event); 4637 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4638 (auth_transaction == 2 && 4639 ifmgd->auth_data->expected_transaction == 2)) { 4640 if (!ieee80211_mark_sta_auth(sdata)) 4641 return; /* ignore frame -- wait for timeout */ 4642 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4643 auth_transaction == 2) { 4644 sdata_info(sdata, "SAE peer confirmed\n"); 4645 ifmgd->auth_data->peer_confirmed = true; 4646 } 4647 4648 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4649 notify_driver: 4650 drv_mgd_complete_tx(sdata->local, sdata, &info); 4651 } 4652 4653 #define case_WLAN(type) \ 4654 case WLAN_REASON_##type: return #type 4655 4656 const char *ieee80211_get_reason_code_string(u16 reason_code) 4657 { 4658 switch (reason_code) { 4659 case_WLAN(UNSPECIFIED); 4660 case_WLAN(PREV_AUTH_NOT_VALID); 4661 case_WLAN(DEAUTH_LEAVING); 4662 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4663 case_WLAN(DISASSOC_AP_BUSY); 4664 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4665 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4666 case_WLAN(DISASSOC_STA_HAS_LEFT); 4667 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4668 case_WLAN(DISASSOC_BAD_POWER); 4669 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4670 case_WLAN(INVALID_IE); 4671 case_WLAN(MIC_FAILURE); 4672 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4673 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4674 case_WLAN(IE_DIFFERENT); 4675 case_WLAN(INVALID_GROUP_CIPHER); 4676 case_WLAN(INVALID_PAIRWISE_CIPHER); 4677 case_WLAN(INVALID_AKMP); 4678 case_WLAN(UNSUPP_RSN_VERSION); 4679 case_WLAN(INVALID_RSN_IE_CAP); 4680 case_WLAN(IEEE8021X_FAILED); 4681 case_WLAN(CIPHER_SUITE_REJECTED); 4682 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4683 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4684 case_WLAN(DISASSOC_LOW_ACK); 4685 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4686 case_WLAN(QSTA_LEAVE_QBSS); 4687 case_WLAN(QSTA_NOT_USE); 4688 case_WLAN(QSTA_REQUIRE_SETUP); 4689 case_WLAN(QSTA_TIMEOUT); 4690 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4691 case_WLAN(MESH_PEER_CANCELED); 4692 case_WLAN(MESH_MAX_PEERS); 4693 case_WLAN(MESH_CONFIG); 4694 case_WLAN(MESH_CLOSE); 4695 case_WLAN(MESH_MAX_RETRIES); 4696 case_WLAN(MESH_CONFIRM_TIMEOUT); 4697 case_WLAN(MESH_INVALID_GTK); 4698 case_WLAN(MESH_INCONSISTENT_PARAM); 4699 case_WLAN(MESH_INVALID_SECURITY); 4700 case_WLAN(MESH_PATH_ERROR); 4701 case_WLAN(MESH_PATH_NOFORWARD); 4702 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4703 case_WLAN(MAC_EXISTS_IN_MBSS); 4704 case_WLAN(MESH_CHAN_REGULATORY); 4705 case_WLAN(MESH_CHAN); 4706 default: return "<unknown>"; 4707 } 4708 } 4709 4710 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4711 struct ieee80211_mgmt *mgmt, size_t len) 4712 { 4713 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4714 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4715 4716 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4717 4718 if (len < 24 + 2) 4719 return; 4720 4721 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4722 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4723 return; 4724 } 4725 4726 if (ifmgd->associated && 4727 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4728 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4729 sdata->vif.cfg.ap_addr, reason_code, 4730 ieee80211_get_reason_code_string(reason_code)); 4731 4732 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4733 4734 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4735 reason_code, false); 4736 return; 4737 } 4738 4739 if (ifmgd->assoc_data && 4740 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4741 sdata_info(sdata, 4742 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4743 ifmgd->assoc_data->ap_addr, reason_code, 4744 ieee80211_get_reason_code_string(reason_code)); 4745 4746 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4747 4748 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4749 return; 4750 } 4751 } 4752 4753 4754 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4755 struct ieee80211_mgmt *mgmt, size_t len) 4756 { 4757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4758 u16 reason_code; 4759 4760 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4761 4762 if (len < 24 + 2) 4763 return; 4764 4765 if (!ifmgd->associated || 4766 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 4767 return; 4768 4769 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 4770 4771 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4772 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4773 return; 4774 } 4775 4776 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 4777 sdata->vif.cfg.ap_addr, reason_code, 4778 ieee80211_get_reason_code_string(reason_code)); 4779 4780 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4781 4782 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 4783 false); 4784 } 4785 4786 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 4787 struct ieee80211_supported_band *sband, 4788 const struct link_sta_info *link_sta, 4789 const struct ieee802_11_elems *elems) 4790 { 4791 const struct ieee80211_sta_he_cap *own_he_cap = 4792 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4793 4794 if (elems->ext_capab_len < 10) 4795 return false; 4796 4797 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 4798 return false; 4799 4800 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 4801 IEEE80211_HE_MAC_CAP0_TWT_RES && 4802 own_he_cap && 4803 (own_he_cap->he_cap_elem.mac_cap_info[0] & 4804 IEEE80211_HE_MAC_CAP0_TWT_REQ); 4805 } 4806 4807 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 4808 struct ieee80211_supported_band *sband, 4809 struct ieee80211_link_data *link, 4810 struct link_sta_info *link_sta, 4811 struct ieee802_11_elems *elems) 4812 { 4813 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 4814 4815 if (link->conf->twt_requester != twt) { 4816 link->conf->twt_requester = twt; 4817 return BSS_CHANGED_TWT; 4818 } 4819 return 0; 4820 } 4821 4822 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 4823 struct ieee80211_bss_conf *bss_conf, 4824 struct ieee80211_supported_band *sband, 4825 struct link_sta_info *link_sta) 4826 { 4827 const struct ieee80211_sta_he_cap *own_he_cap = 4828 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4829 4830 return bss_conf->he_support && 4831 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 4832 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 4833 own_he_cap && 4834 (own_he_cap->he_cap_elem.mac_cap_info[2] & 4835 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 4836 } 4837 4838 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 4839 struct link_sta_info *link_sta, 4840 struct cfg80211_bss *cbss, 4841 struct ieee80211_mgmt *mgmt, 4842 const u8 *elem_start, 4843 unsigned int elem_len, 4844 u64 *changed) 4845 { 4846 struct ieee80211_sub_if_data *sdata = link->sdata; 4847 struct ieee80211_mgd_assoc_data *assoc_data = 4848 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 4849 struct ieee80211_bss_conf *bss_conf = link->conf; 4850 struct ieee80211_local *local = sdata->local; 4851 unsigned int link_id = link->link_id; 4852 struct ieee80211_elems_parse_params parse_params = { 4853 .mode = link->u.mgd.conn.mode, 4854 .start = elem_start, 4855 .len = elem_len, 4856 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4857 .from_ap = true, 4858 }; 4859 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4860 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4861 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4862 const struct cfg80211_bss_ies *bss_ies = NULL; 4863 struct ieee80211_supported_band *sband; 4864 struct ieee802_11_elems *elems; 4865 const __le16 prof_bss_param_ch_present = 4866 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 4867 u16 capab_info; 4868 bool ret; 4869 4870 elems = ieee802_11_parse_elems_full(&parse_params); 4871 if (!elems) 4872 return false; 4873 4874 if (link_id == assoc_data->assoc_link_id) { 4875 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4876 4877 /* 4878 * we should not get to this flow unless the association was 4879 * successful, so set the status directly to success 4880 */ 4881 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4882 if (elems->ml_basic) { 4883 int bss_param_ch_cnt = 4884 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 4885 4886 if (bss_param_ch_cnt < 0) { 4887 ret = false; 4888 goto out; 4889 } 4890 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 4891 bss_conf->bss_param_ch_cnt_link_id = link_id; 4892 } 4893 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 4894 !elems->prof || 4895 !(elems->prof->control & prof_bss_param_ch_present)) { 4896 ret = false; 4897 goto out; 4898 } else { 4899 const u8 *ptr = elems->prof->variable + 4900 elems->prof->sta_info_len - 1; 4901 int bss_param_ch_cnt; 4902 4903 /* 4904 * During parsing, we validated that these fields exist, 4905 * otherwise elems->prof would have been set to NULL. 4906 */ 4907 capab_info = get_unaligned_le16(ptr); 4908 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4909 bss_param_ch_cnt = 4910 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4911 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 4912 bss_conf->bss_param_ch_cnt_link_id = link_id; 4913 4914 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4915 link_info(link, "association response status code=%u\n", 4916 assoc_data->link[link_id].status); 4917 ret = true; 4918 goto out; 4919 } 4920 } 4921 4922 if (!is_s1g && !elems->supp_rates) { 4923 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4924 ret = false; 4925 goto out; 4926 } 4927 4928 link->u.mgd.tdls_chan_switch_prohibited = 4929 elems->ext_capab && elems->ext_capab_len >= 5 && 4930 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4931 4932 /* 4933 * Some APs are erroneously not including some information in their 4934 * (re)association response frames. Try to recover by using the data 4935 * from the beacon or probe response. This seems to afflict mobile 4936 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4937 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4938 */ 4939 if (!is_6ghz && 4940 ((assoc_data->wmm && !elems->wmm_param) || 4941 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4942 (!elems->ht_cap_elem || !elems->ht_operation)) || 4943 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4944 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4945 const struct cfg80211_bss_ies *ies; 4946 struct ieee802_11_elems *bss_elems; 4947 4948 rcu_read_lock(); 4949 ies = rcu_dereference(cbss->ies); 4950 if (ies) 4951 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4952 GFP_ATOMIC); 4953 rcu_read_unlock(); 4954 if (!bss_ies) { 4955 ret = false; 4956 goto out; 4957 } 4958 4959 parse_params.start = bss_ies->data; 4960 parse_params.len = bss_ies->len; 4961 parse_params.bss = cbss; 4962 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4963 if (!bss_elems) { 4964 ret = false; 4965 goto out; 4966 } 4967 4968 if (assoc_data->wmm && 4969 !elems->wmm_param && bss_elems->wmm_param) { 4970 elems->wmm_param = bss_elems->wmm_param; 4971 sdata_info(sdata, 4972 "AP bug: WMM param missing from AssocResp\n"); 4973 } 4974 4975 /* 4976 * Also check if we requested HT/VHT, otherwise the AP doesn't 4977 * have to include the IEs in the (re)association response. 4978 */ 4979 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4980 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4981 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4982 sdata_info(sdata, 4983 "AP bug: HT capability missing from AssocResp\n"); 4984 } 4985 if (!elems->ht_operation && bss_elems->ht_operation && 4986 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4987 elems->ht_operation = bss_elems->ht_operation; 4988 sdata_info(sdata, 4989 "AP bug: HT operation missing from AssocResp\n"); 4990 } 4991 4992 if (is_5ghz) { 4993 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4994 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4995 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4996 sdata_info(sdata, 4997 "AP bug: VHT capa missing from AssocResp\n"); 4998 } 4999 5000 if (!elems->vht_operation && bss_elems->vht_operation && 5001 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5002 elems->vht_operation = bss_elems->vht_operation; 5003 sdata_info(sdata, 5004 "AP bug: VHT operation missing from AssocResp\n"); 5005 } 5006 } 5007 kfree(bss_elems); 5008 } 5009 5010 /* 5011 * We previously checked these in the beacon/probe response, so 5012 * they should be present here. This is just a safety net. 5013 * Note that the ieee80211_config_bw() below would also check 5014 * for this (and more), but this has better error reporting. 5015 */ 5016 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5017 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5018 sdata_info(sdata, 5019 "HT AP is missing WMM params or HT capability/operation\n"); 5020 ret = false; 5021 goto out; 5022 } 5023 5024 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5025 (!elems->vht_cap_elem || !elems->vht_operation)) { 5026 sdata_info(sdata, 5027 "VHT AP is missing VHT capability/operation\n"); 5028 ret = false; 5029 goto out; 5030 } 5031 5032 /* check/update if AP changed anything in assoc response vs. scan */ 5033 if (ieee80211_config_bw(link, elems, 5034 link_id == assoc_data->assoc_link_id, 5035 changed, "assoc response")) { 5036 ret = false; 5037 goto out; 5038 } 5039 5040 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5041 ret = false; 5042 goto out; 5043 } 5044 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5045 5046 /* Set up internal HT/VHT capabilities */ 5047 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5048 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5049 elems->ht_cap_elem, 5050 link_sta); 5051 5052 if (elems->vht_cap_elem && 5053 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5054 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5055 const struct cfg80211_bss_ies *ies; 5056 5057 /* 5058 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5059 * too large maximum MPDU length in the association response 5060 * (indicating 12k) that it cannot actually process ... 5061 * Work around that. 5062 */ 5063 rcu_read_lock(); 5064 ies = rcu_dereference(cbss->ies); 5065 if (ies) { 5066 const struct element *elem; 5067 5068 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5069 ies->data, ies->len); 5070 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5071 bss_vht_cap = (const void *)elem->data; 5072 } 5073 5074 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5075 elems->vht_cap_elem, 5076 bss_vht_cap, link_sta); 5077 rcu_read_unlock(); 5078 } 5079 5080 if (elems->he_operation && 5081 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5082 elems->he_cap) { 5083 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5084 elems->he_cap, 5085 elems->he_cap_len, 5086 elems->he_6ghz_capa, 5087 link_sta); 5088 5089 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5090 if (elems->rsnx && elems->rsnx_len && 5091 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5092 wiphy_ext_feature_isset(local->hw.wiphy, 5093 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5094 bss_conf->twt_protected = true; 5095 else 5096 bss_conf->twt_protected = false; 5097 5098 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5099 link_sta, elems); 5100 5101 if (elems->eht_operation && elems->eht_cap && 5102 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5103 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5104 elems->he_cap, 5105 elems->he_cap_len, 5106 elems->eht_cap, 5107 elems->eht_cap_len, 5108 link_sta); 5109 5110 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5111 } else { 5112 bss_conf->eht_support = false; 5113 } 5114 } else { 5115 bss_conf->he_support = false; 5116 bss_conf->twt_requester = false; 5117 bss_conf->twt_protected = false; 5118 bss_conf->eht_support = false; 5119 } 5120 5121 bss_conf->twt_broadcast = 5122 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5123 5124 if (bss_conf->he_support) { 5125 bss_conf->he_bss_color.color = 5126 le32_get_bits(elems->he_operation->he_oper_params, 5127 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5128 bss_conf->he_bss_color.partial = 5129 le32_get_bits(elems->he_operation->he_oper_params, 5130 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5131 bss_conf->he_bss_color.enabled = 5132 !le32_get_bits(elems->he_operation->he_oper_params, 5133 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5134 5135 if (bss_conf->he_bss_color.enabled) 5136 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5137 5138 bss_conf->htc_trig_based_pkt_ext = 5139 le32_get_bits(elems->he_operation->he_oper_params, 5140 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5141 bss_conf->frame_time_rts_th = 5142 le32_get_bits(elems->he_operation->he_oper_params, 5143 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5144 5145 bss_conf->uora_exists = !!elems->uora_element; 5146 if (elems->uora_element) 5147 bss_conf->uora_ocw_range = elems->uora_element[0]; 5148 5149 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5150 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5151 /* TODO: OPEN: what happens if BSS color disable is set? */ 5152 } 5153 5154 if (cbss->transmitted_bss) { 5155 bss_conf->nontransmitted = true; 5156 ether_addr_copy(bss_conf->transmitter_bssid, 5157 cbss->transmitted_bss->bssid); 5158 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5159 bss_conf->bssid_index = cbss->bssid_index; 5160 } 5161 5162 /* 5163 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5164 * in their association response, so ignore that data for our own 5165 * configuration. If it changed since the last beacon, we'll get the 5166 * next beacon and update then. 5167 */ 5168 5169 /* 5170 * If an operating mode notification IE is present, override the 5171 * NSS calculation (that would be done in rate_control_rate_init()) 5172 * and use the # of streams from that element. 5173 */ 5174 if (elems->opmode_notif && 5175 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5176 u8 nss; 5177 5178 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5179 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5180 nss += 1; 5181 link_sta->pub->rx_nss = nss; 5182 } 5183 5184 /* 5185 * Always handle WMM once after association regardless 5186 * of the first value the AP uses. Setting -1 here has 5187 * that effect because the AP values is an unsigned 5188 * 4-bit value. 5189 */ 5190 link->u.mgd.wmm_last_param_set = -1; 5191 link->u.mgd.mu_edca_last_param_set = -1; 5192 5193 if (link->u.mgd.disable_wmm_tracking) { 5194 ieee80211_set_wmm_default(link, false, false); 5195 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5196 elems->wmm_param_len, 5197 elems->mu_edca_param_set)) { 5198 /* still enable QoS since we might have HT/VHT */ 5199 ieee80211_set_wmm_default(link, false, true); 5200 /* disable WMM tracking in this case to disable 5201 * tracking WMM parameter changes in the beacon if 5202 * the parameters weren't actually valid. Doing so 5203 * avoids changing parameters very strangely when 5204 * the AP is going back and forth between valid and 5205 * invalid parameters. 5206 */ 5207 link->u.mgd.disable_wmm_tracking = true; 5208 } 5209 5210 if (elems->max_idle_period_ie) { 5211 bss_conf->max_idle_period = 5212 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5213 bss_conf->protected_keep_alive = 5214 !!(elems->max_idle_period_ie->idle_options & 5215 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5216 *changed |= BSS_CHANGED_KEEP_ALIVE; 5217 } else { 5218 bss_conf->max_idle_period = 0; 5219 bss_conf->protected_keep_alive = false; 5220 } 5221 5222 /* set assoc capability (AID was already set earlier), 5223 * ieee80211_set_associated() will tell the driver */ 5224 bss_conf->assoc_capability = capab_info; 5225 5226 ret = true; 5227 out: 5228 kfree(elems); 5229 kfree(bss_ies); 5230 return ret; 5231 } 5232 5233 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5234 struct sta_info *sta, 5235 struct link_sta_info *link_sta, 5236 struct cfg80211_bss *cbss) 5237 { 5238 struct ieee80211_sub_if_data *sdata = link->sdata; 5239 struct ieee80211_local *local = sdata->local; 5240 struct ieee80211_bss *bss = (void *)cbss->priv; 5241 u32 rates = 0, basic_rates = 0; 5242 bool have_higher_than_11mbit = false; 5243 int min_rate = INT_MAX, min_rate_index = -1; 5244 struct ieee80211_supported_band *sband; 5245 5246 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5247 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5248 5249 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5250 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5251 ieee80211_s1g_sta_rate_init(sta); 5252 return 0; 5253 } 5254 5255 sband = local->hw.wiphy->bands[cbss->channel->band]; 5256 5257 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5258 NULL, 0, 5259 &rates, &basic_rates, NULL, 5260 &have_higher_than_11mbit, 5261 &min_rate, &min_rate_index); 5262 5263 /* 5264 * This used to be a workaround for basic rates missing 5265 * in the association response frame. Now that we no 5266 * longer use the basic rates from there, it probably 5267 * doesn't happen any more, but keep the workaround so 5268 * in case some *other* APs are buggy in different ways 5269 * we can connect -- with a warning. 5270 * Allow this workaround only in case the AP provided at least 5271 * one rate. 5272 */ 5273 if (min_rate_index < 0) { 5274 link_info(link, "No legacy rates in association response\n"); 5275 return -EINVAL; 5276 } else if (!basic_rates) { 5277 link_info(link, "No basic rates, using min rate instead\n"); 5278 basic_rates = BIT(min_rate_index); 5279 } 5280 5281 if (rates) 5282 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5283 else 5284 link_info(link, "No rates found, keeping mandatory only\n"); 5285 5286 link->conf->basic_rates = basic_rates; 5287 5288 /* cf. IEEE 802.11 9.2.12 */ 5289 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5290 have_higher_than_11mbit; 5291 5292 return 0; 5293 } 5294 5295 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5296 struct cfg80211_bss *cbss) 5297 { 5298 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5299 const struct element *ht_cap_elem, *vht_cap_elem; 5300 const struct cfg80211_bss_ies *ies; 5301 const struct ieee80211_ht_cap *ht_cap; 5302 const struct ieee80211_vht_cap *vht_cap; 5303 const struct ieee80211_he_cap_elem *he_cap; 5304 const struct element *he_cap_elem; 5305 u16 mcs_80_map, mcs_160_map; 5306 int i, mcs_nss_size; 5307 bool support_160; 5308 u8 chains = 1; 5309 5310 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5311 return chains; 5312 5313 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5314 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5315 ht_cap = (void *)ht_cap_elem->data; 5316 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5317 /* 5318 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5319 * "Tx Unequal Modulation Supported" fields. 5320 */ 5321 } 5322 5323 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5324 return chains; 5325 5326 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5327 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5328 u8 nss; 5329 u16 tx_mcs_map; 5330 5331 vht_cap = (void *)vht_cap_elem->data; 5332 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5333 for (nss = 8; nss > 0; nss--) { 5334 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5335 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5336 break; 5337 } 5338 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5339 chains = max(chains, nss); 5340 } 5341 5342 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5343 return chains; 5344 5345 ies = rcu_dereference(cbss->ies); 5346 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5347 ies->data, ies->len); 5348 5349 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5350 return chains; 5351 5352 /* skip one byte ext_tag_id */ 5353 he_cap = (void *)(he_cap_elem->data + 1); 5354 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5355 5356 /* invalid HE IE */ 5357 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5358 return chains; 5359 5360 /* mcs_nss is right after he_cap info */ 5361 he_mcs_nss_supp = (void *)(he_cap + 1); 5362 5363 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5364 5365 for (i = 7; i >= 0; i--) { 5366 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5367 5368 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5369 chains = max_t(u8, chains, i + 1); 5370 break; 5371 } 5372 } 5373 5374 support_160 = he_cap->phy_cap_info[0] & 5375 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5376 5377 if (!support_160) 5378 return chains; 5379 5380 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5381 for (i = 7; i >= 0; i--) { 5382 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5383 5384 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5385 chains = max_t(u8, chains, i + 1); 5386 break; 5387 } 5388 } 5389 5390 return chains; 5391 } 5392 5393 static void 5394 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5395 struct ieee80211_supported_band *sband, 5396 struct cfg80211_assoc_request *req, 5397 bool wmm_used, int link_id, 5398 struct ieee80211_conn_settings *conn) 5399 { 5400 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5401 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5402 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5403 const struct ieee80211_sta_he_cap *he_cap; 5404 const struct ieee80211_sta_eht_cap *eht_cap; 5405 struct ieee80211_sta_vht_cap vht_cap; 5406 5407 if (sband->band == NL80211_BAND_S1GHZ) { 5408 conn->mode = IEEE80211_CONN_MODE_S1G; 5409 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5410 mlme_dbg(sdata, "operating as S1G STA\n"); 5411 return; 5412 } 5413 5414 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5415 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5416 5417 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5418 5419 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5420 mlme_link_id_dbg(sdata, link_id, 5421 "HT disabled by flag, limiting to legacy\n"); 5422 goto out; 5423 } 5424 5425 if (!wmm_used) { 5426 mlme_link_id_dbg(sdata, link_id, 5427 "WMM/QoS not supported, limiting to legacy\n"); 5428 goto out; 5429 } 5430 5431 if (req) { 5432 unsigned int i; 5433 5434 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5435 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5436 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5437 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5438 netdev_info(sdata->dev, 5439 "WEP/TKIP use, limiting to legacy\n"); 5440 goto out; 5441 } 5442 } 5443 } 5444 5445 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5446 mlme_link_id_dbg(sdata, link_id, 5447 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5448 goto out; 5449 } 5450 5451 /* HT is fine */ 5452 conn->mode = IEEE80211_CONN_MODE_HT; 5453 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5454 IEEE80211_CONN_BW_LIMIT_40 : 5455 IEEE80211_CONN_BW_LIMIT_20; 5456 5457 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5458 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5459 5460 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5461 mlme_link_id_dbg(sdata, link_id, 5462 "VHT disabled by flag, limiting to HT\n"); 5463 goto out; 5464 } 5465 5466 if (vht_cap.vht_supported && is_5ghz) { 5467 bool have_80mhz = false; 5468 unsigned int i; 5469 5470 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5471 mlme_link_id_dbg(sdata, link_id, 5472 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5473 goto out; 5474 } 5475 5476 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5477 for (i = 0; i < sband->n_channels; i++) { 5478 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5479 IEEE80211_CHAN_NO_80MHZ)) 5480 continue; 5481 5482 have_80mhz = true; 5483 break; 5484 } 5485 5486 if (!have_80mhz) { 5487 mlme_link_id_dbg(sdata, link_id, 5488 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5489 goto out; 5490 } 5491 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5492 mlme_link_id_dbg(sdata, link_id, 5493 "no VHT support on 5 GHz, limiting to HT\n"); 5494 goto out; 5495 } 5496 5497 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5498 if (sband->band != NL80211_BAND_2GHZ) { 5499 conn->mode = IEEE80211_CONN_MODE_VHT; 5500 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5501 } 5502 5503 if (is_5ghz && 5504 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5505 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5506 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5507 mlme_link_id_dbg(sdata, link_id, 5508 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5509 } 5510 5511 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5512 mlme_link_id_dbg(sdata, link_id, 5513 "HE disabled by flag, limiting to HT/VHT\n"); 5514 goto out; 5515 } 5516 5517 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5518 if (!he_cap) { 5519 WARN_ON(is_6ghz); 5520 mlme_link_id_dbg(sdata, link_id, 5521 "no HE support, limiting to HT/VHT\n"); 5522 goto out; 5523 } 5524 5525 /* so we have HE */ 5526 conn->mode = IEEE80211_CONN_MODE_HE; 5527 5528 /* check bandwidth */ 5529 switch (sband->band) { 5530 default: 5531 case NL80211_BAND_2GHZ: 5532 if (he_cap->he_cap_elem.phy_cap_info[0] & 5533 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5534 break; 5535 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5536 mlme_link_id_dbg(sdata, link_id, 5537 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5538 break; 5539 case NL80211_BAND_5GHZ: 5540 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5541 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5542 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5543 mlme_link_id_dbg(sdata, link_id, 5544 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5545 break; 5546 } 5547 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5548 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5549 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5550 conn->bw_limit, 5551 IEEE80211_CONN_BW_LIMIT_80); 5552 mlme_link_id_dbg(sdata, link_id, 5553 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5554 } 5555 break; 5556 case NL80211_BAND_6GHZ: 5557 if (he_cap->he_cap_elem.phy_cap_info[0] & 5558 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5559 break; 5560 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5561 conn->bw_limit, 5562 IEEE80211_CONN_BW_LIMIT_80); 5563 mlme_link_id_dbg(sdata, link_id, 5564 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5565 break; 5566 } 5567 5568 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5569 mlme_link_id_dbg(sdata, link_id, 5570 "EHT disabled by flag, limiting to HE\n"); 5571 goto out; 5572 } 5573 5574 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5575 if (!eht_cap) { 5576 mlme_link_id_dbg(sdata, link_id, 5577 "no EHT support, limiting to HE\n"); 5578 goto out; 5579 } 5580 5581 /* we have EHT */ 5582 5583 conn->mode = IEEE80211_CONN_MODE_EHT; 5584 5585 /* check bandwidth */ 5586 if (is_6ghz && 5587 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5588 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5589 else if (is_6ghz) 5590 mlme_link_id_dbg(sdata, link_id, 5591 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5592 5593 out: 5594 mlme_link_id_dbg(sdata, link_id, 5595 "determined local STA to be %s, BW limited to %d MHz\n", 5596 ieee80211_conn_mode_str(conn->mode), 5597 20 * (1 << conn->bw_limit)); 5598 } 5599 5600 static void 5601 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5602 struct ieee80211_supported_band *sband, 5603 struct cfg80211_auth_request *req, 5604 bool wmm_used, 5605 struct ieee80211_conn_settings *conn) 5606 { 5607 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5608 req->link_id > 0 ? req->link_id : 0, 5609 conn); 5610 } 5611 5612 static void 5613 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5614 struct ieee80211_supported_band *sband, 5615 struct cfg80211_assoc_request *req, 5616 bool wmm_used, int link_id, 5617 struct ieee80211_conn_settings *conn) 5618 { 5619 struct ieee80211_conn_settings tmp; 5620 5621 WARN_ON(!req); 5622 5623 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5624 &tmp); 5625 5626 conn->mode = min_t(enum ieee80211_conn_mode, 5627 conn->mode, tmp.mode); 5628 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5629 conn->bw_limit, tmp.bw_limit); 5630 } 5631 5632 static enum ieee80211_ap_reg_power 5633 ieee80211_ap_power_type(u8 control) 5634 { 5635 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 5636 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 5637 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 5638 return IEEE80211_REG_LPI_AP; 5639 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 5640 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 5641 return IEEE80211_REG_SP_AP; 5642 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 5643 return IEEE80211_REG_VLP_AP; 5644 default: 5645 return IEEE80211_REG_UNSET_AP; 5646 } 5647 } 5648 5649 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5650 struct ieee80211_link_data *link, 5651 int link_id, 5652 struct cfg80211_bss *cbss, bool mlo, 5653 struct ieee80211_conn_settings *conn, 5654 unsigned long *userspace_selectors) 5655 { 5656 struct ieee80211_local *local = sdata->local; 5657 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5658 struct ieee80211_chan_req chanreq = {}; 5659 struct cfg80211_chan_def ap_chandef; 5660 struct ieee802_11_elems *elems; 5661 int ret; 5662 5663 lockdep_assert_wiphy(local->hw.wiphy); 5664 5665 rcu_read_lock(); 5666 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 5667 &chanreq, &ap_chandef, 5668 userspace_selectors); 5669 5670 if (IS_ERR(elems)) { 5671 rcu_read_unlock(); 5672 return PTR_ERR(elems); 5673 } 5674 5675 if (mlo && !elems->ml_basic) { 5676 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5677 rcu_read_unlock(); 5678 kfree(elems); 5679 return -EINVAL; 5680 } 5681 5682 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 5683 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 5684 5685 if (elems->pwr_constr_elem) 5686 link->conf->pwr_reduction = *elems->pwr_constr_elem; 5687 5688 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 5689 if (he_6ghz_oper) 5690 link->conf->power_type = 5691 ieee80211_ap_power_type(he_6ghz_oper->control); 5692 else 5693 link_info(link, 5694 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 5695 cbss->channel->center_freq); 5696 5697 link->conf->tpe = elems->tpe; 5698 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 5699 &chanreq.oper); 5700 } 5701 rcu_read_unlock(); 5702 /* the element data was RCU protected so no longer valid anyway */ 5703 kfree(elems); 5704 elems = NULL; 5705 5706 if (!link) 5707 return 0; 5708 5709 rcu_read_lock(); 5710 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 5711 local->rx_chains); 5712 rcu_read_unlock(); 5713 5714 /* 5715 * If this fails (possibly due to channel context sharing 5716 * on incompatible channels, e.g. 80+80 and 160 sharing the 5717 * same control channel) try to use a smaller bandwidth. 5718 */ 5719 ret = ieee80211_link_use_channel(link, &chanreq, 5720 IEEE80211_CHANCTX_SHARED); 5721 5722 /* don't downgrade for 5 and 10 MHz channels, though. */ 5723 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 5724 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 5725 return ret; 5726 5727 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 5728 ieee80211_chanreq_downgrade(&chanreq, conn); 5729 5730 ret = ieee80211_link_use_channel(link, &chanreq, 5731 IEEE80211_CHANCTX_SHARED); 5732 } 5733 5734 return ret; 5735 } 5736 5737 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5738 u8 *dtim_count, u8 *dtim_period) 5739 { 5740 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5741 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5742 ies->len); 5743 const struct ieee80211_tim_ie *tim = NULL; 5744 const struct ieee80211_bssid_index *idx; 5745 bool valid = tim_ie && tim_ie[1] >= 2; 5746 5747 if (valid) 5748 tim = (void *)(tim_ie + 2); 5749 5750 if (dtim_count) 5751 *dtim_count = valid ? tim->dtim_count : 0; 5752 5753 if (dtim_period) 5754 *dtim_period = valid ? tim->dtim_period : 0; 5755 5756 /* Check if value is overridden by non-transmitted profile */ 5757 if (!idx_ie || idx_ie[1] < 3) 5758 return valid; 5759 5760 idx = (void *)(idx_ie + 2); 5761 5762 if (dtim_count) 5763 *dtim_count = idx->dtim_count; 5764 5765 if (dtim_period) 5766 *dtim_period = idx->dtim_period; 5767 5768 return true; 5769 } 5770 5771 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5772 struct ieee80211_mgmt *mgmt, 5773 struct ieee802_11_elems *elems, 5774 const u8 *elem_start, unsigned int elem_len) 5775 { 5776 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5777 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5778 struct ieee80211_local *local = sdata->local; 5779 unsigned int link_id; 5780 struct sta_info *sta; 5781 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5782 u16 valid_links = 0, dormant_links = 0; 5783 int err; 5784 5785 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5786 /* 5787 * station info was already allocated and inserted before 5788 * the association and should be available to us 5789 */ 5790 sta = sta_info_get(sdata, assoc_data->ap_addr); 5791 if (WARN_ON(!sta)) 5792 goto out_err; 5793 5794 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 5795 5796 if (ieee80211_vif_is_mld(&sdata->vif)) { 5797 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5798 if (!assoc_data->link[link_id].bss) 5799 continue; 5800 5801 valid_links |= BIT(link_id); 5802 if (assoc_data->link[link_id].disabled) 5803 dormant_links |= BIT(link_id); 5804 5805 if (link_id != assoc_data->assoc_link_id) { 5806 err = ieee80211_sta_allocate_link(sta, link_id); 5807 if (err) 5808 goto out_err; 5809 } 5810 } 5811 5812 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5813 } 5814 5815 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5816 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5817 struct ieee80211_link_data *link; 5818 struct link_sta_info *link_sta; 5819 5820 if (!cbss) 5821 continue; 5822 5823 link = sdata_dereference(sdata->link[link_id], sdata); 5824 if (WARN_ON(!link)) 5825 goto out_err; 5826 5827 if (ieee80211_vif_is_mld(&sdata->vif)) 5828 link_info(link, 5829 "local address %pM, AP link address %pM%s\n", 5830 link->conf->addr, 5831 assoc_data->link[link_id].bss->bssid, 5832 link_id == assoc_data->assoc_link_id ? 5833 " (assoc)" : ""); 5834 5835 link_sta = rcu_dereference_protected(sta->link[link_id], 5836 lockdep_is_held(&local->hw.wiphy->mtx)); 5837 if (WARN_ON(!link_sta)) 5838 goto out_err; 5839 5840 if (!link->u.mgd.have_beacon) { 5841 const struct cfg80211_bss_ies *ies; 5842 5843 rcu_read_lock(); 5844 ies = rcu_dereference(cbss->beacon_ies); 5845 if (ies) 5846 link->u.mgd.have_beacon = true; 5847 else 5848 ies = rcu_dereference(cbss->ies); 5849 ieee80211_get_dtim(ies, 5850 &link->conf->sync_dtim_count, 5851 &link->u.mgd.dtim_period); 5852 link->conf->beacon_int = cbss->beacon_interval; 5853 rcu_read_unlock(); 5854 } 5855 5856 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5857 5858 if (link_id != assoc_data->assoc_link_id) { 5859 link->u.mgd.conn = assoc_data->link[link_id].conn; 5860 5861 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 5862 true, &link->u.mgd.conn, 5863 assoc_data->userspace_selectors); 5864 if (err) { 5865 link_info(link, "prep_channel failed\n"); 5866 goto out_err; 5867 } 5868 } 5869 5870 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5871 assoc_data->link[link_id].bss); 5872 if (err) 5873 goto out_err; 5874 5875 if (!ieee80211_assoc_config_link(link, link_sta, 5876 assoc_data->link[link_id].bss, 5877 mgmt, elem_start, elem_len, 5878 &changed[link_id])) 5879 goto out_err; 5880 5881 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5882 valid_links &= ~BIT(link_id); 5883 ieee80211_sta_remove_link(sta, link_id); 5884 continue; 5885 } 5886 5887 if (link_id != assoc_data->assoc_link_id) { 5888 err = ieee80211_sta_activate_link(sta, link_id); 5889 if (err) 5890 goto out_err; 5891 } 5892 } 5893 5894 /* links might have changed due to rejected ones, set them again */ 5895 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5896 5897 rate_control_rate_init_all_links(sta); 5898 5899 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5900 set_sta_flag(sta, WLAN_STA_MFP); 5901 sta->sta.mfp = true; 5902 } else { 5903 sta->sta.mfp = false; 5904 } 5905 5906 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5907 elems->ext_capab_len); 5908 5909 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5910 local->hw.queues >= IEEE80211_NUM_ACS; 5911 5912 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5913 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5914 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5915 if (err) { 5916 sdata_info(sdata, 5917 "failed to move station %pM to desired state\n", 5918 sta->sta.addr); 5919 WARN_ON(__sta_info_destroy(sta)); 5920 goto out_err; 5921 } 5922 5923 if (sdata->wdev.use_4addr) 5924 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5925 5926 ieee80211_set_associated(sdata, assoc_data, changed); 5927 5928 /* 5929 * If we're using 4-addr mode, let the AP know that we're 5930 * doing so, so that it can create the STA VLAN on its side 5931 */ 5932 if (ifmgd->use_4addr) 5933 ieee80211_send_4addr_nullfunc(local, sdata); 5934 5935 /* 5936 * Start timer to probe the connection to the AP now. 5937 * Also start the timer that will detect beacon loss. 5938 */ 5939 ieee80211_sta_reset_beacon_monitor(sdata); 5940 ieee80211_sta_reset_conn_monitor(sdata); 5941 5942 return true; 5943 out_err: 5944 eth_zero_addr(sdata->vif.cfg.ap_addr); 5945 return false; 5946 } 5947 5948 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5949 struct ieee80211_mgmt *mgmt, 5950 size_t len) 5951 { 5952 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5953 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5954 u16 capab_info, status_code, aid; 5955 struct ieee80211_elems_parse_params parse_params = { 5956 .bss = NULL, 5957 .link_id = -1, 5958 .from_ap = true, 5959 }; 5960 struct ieee802_11_elems *elems; 5961 int ac; 5962 const u8 *elem_start; 5963 unsigned int elem_len; 5964 bool reassoc; 5965 struct ieee80211_event event = { 5966 .type = MLME_EVENT, 5967 .u.mlme.data = ASSOC_EVENT, 5968 }; 5969 struct ieee80211_prep_tx_info info = {}; 5970 struct cfg80211_rx_assoc_resp_data resp = { 5971 .uapsd_queues = -1, 5972 }; 5973 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5974 unsigned int link_id; 5975 5976 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5977 5978 if (!assoc_data) 5979 return; 5980 5981 info.link_id = assoc_data->assoc_link_id; 5982 5983 parse_params.mode = 5984 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 5985 5986 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5987 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5988 return; 5989 5990 /* 5991 * AssocResp and ReassocResp have identical structure, so process both 5992 * of them in this function. 5993 */ 5994 5995 if (len < 24 + 6) 5996 return; 5997 5998 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5999 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6000 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6001 if (assoc_data->s1g) 6002 elem_start = mgmt->u.s1g_assoc_resp.variable; 6003 else 6004 elem_start = mgmt->u.assoc_resp.variable; 6005 6006 /* 6007 * Note: this may not be perfect, AP might misbehave - if 6008 * anyone needs to rely on perfect complete notification 6009 * with the exact right subtype, then we need to track what 6010 * we actually transmitted. 6011 */ 6012 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6013 IEEE80211_STYPE_ASSOC_REQ; 6014 6015 if (assoc_data->fils_kek_len && 6016 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6017 return; 6018 6019 elem_len = len - (elem_start - (u8 *)mgmt); 6020 parse_params.start = elem_start; 6021 parse_params.len = elem_len; 6022 elems = ieee802_11_parse_elems_full(&parse_params); 6023 if (!elems) 6024 goto notify_driver; 6025 6026 if (elems->aid_resp) 6027 aid = le16_to_cpu(elems->aid_resp->aid); 6028 else if (assoc_data->s1g) 6029 aid = 0; /* TODO */ 6030 else 6031 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6032 6033 /* 6034 * The 5 MSB of the AID field are reserved 6035 * (802.11-2016 9.4.1.8 AID field) 6036 */ 6037 aid &= 0x7ff; 6038 6039 sdata_info(sdata, 6040 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6041 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6042 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 6043 6044 ifmgd->broken_ap = false; 6045 6046 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6047 elems->timeout_int && 6048 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6049 u32 tu, ms; 6050 6051 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6052 le32_to_cpu(elems->timeout_int->value)); 6053 6054 tu = le32_to_cpu(elems->timeout_int->value); 6055 ms = tu * 1024 / 1000; 6056 sdata_info(sdata, 6057 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6058 assoc_data->ap_addr, tu, ms); 6059 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6060 assoc_data->timeout_started = true; 6061 assoc_data->comeback = true; 6062 if (ms > IEEE80211_ASSOC_TIMEOUT) 6063 run_again(sdata, assoc_data->timeout); 6064 goto notify_driver; 6065 } 6066 6067 if (status_code != WLAN_STATUS_SUCCESS) { 6068 sdata_info(sdata, "%pM denied association (code=%d)\n", 6069 assoc_data->ap_addr, status_code); 6070 event.u.mlme.status = MLME_DENIED; 6071 event.u.mlme.reason = status_code; 6072 drv_event_callback(sdata->local, sdata, &event); 6073 } else { 6074 if (aid == 0 || aid > IEEE80211_MAX_AID) { 6075 sdata_info(sdata, 6076 "invalid AID value %d (out of range), turn off PS\n", 6077 aid); 6078 aid = 0; 6079 ifmgd->broken_ap = true; 6080 } 6081 6082 if (ieee80211_vif_is_mld(&sdata->vif)) { 6083 struct ieee80211_mle_basic_common_info *common; 6084 6085 if (!elems->ml_basic) { 6086 sdata_info(sdata, 6087 "MLO association with %pM but no (basic) multi-link element in response!\n", 6088 assoc_data->ap_addr); 6089 goto abandon_assoc; 6090 } 6091 6092 common = (void *)elems->ml_basic->variable; 6093 6094 if (memcmp(assoc_data->ap_addr, 6095 common->mld_mac_addr, ETH_ALEN)) { 6096 sdata_info(sdata, 6097 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6098 common->mld_mac_addr, 6099 assoc_data->ap_addr); 6100 goto abandon_assoc; 6101 } 6102 6103 sdata->vif.cfg.eml_cap = 6104 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6105 sdata->vif.cfg.eml_med_sync_delay = 6106 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6107 sdata->vif.cfg.mld_capa_op = 6108 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6109 } 6110 6111 sdata->vif.cfg.aid = aid; 6112 6113 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6114 elem_start, elem_len)) { 6115 /* oops -- internal error -- send timeout for now */ 6116 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6117 goto notify_driver; 6118 } 6119 event.u.mlme.status = MLME_SUCCESS; 6120 drv_event_callback(sdata->local, sdata, &event); 6121 sdata_info(sdata, "associated\n"); 6122 6123 info.success = 1; 6124 } 6125 6126 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6127 struct ieee80211_link_data *link; 6128 6129 if (!assoc_data->link[link_id].bss) 6130 continue; 6131 6132 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6133 ether_addr_copy(resp.links[link_id].addr, 6134 assoc_data->link[link_id].addr); 6135 resp.links[link_id].status = assoc_data->link[link_id].status; 6136 6137 link = sdata_dereference(sdata->link[link_id], sdata); 6138 if (!link) 6139 continue; 6140 6141 /* get uapsd queues configuration - same for all links */ 6142 resp.uapsd_queues = 0; 6143 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6144 if (link->tx_conf[ac].uapsd) 6145 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6146 } 6147 6148 if (ieee80211_vif_is_mld(&sdata->vif)) { 6149 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6150 resp.ap_mld_addr = ap_mld_addr; 6151 } 6152 6153 ieee80211_destroy_assoc_data(sdata, 6154 status_code == WLAN_STATUS_SUCCESS ? 6155 ASSOC_SUCCESS : 6156 ASSOC_REJECTED); 6157 6158 resp.buf = (u8 *)mgmt; 6159 resp.len = len; 6160 resp.req_ies = ifmgd->assoc_req_ies; 6161 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6162 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6163 notify_driver: 6164 drv_mgd_complete_tx(sdata->local, sdata, &info); 6165 kfree(elems); 6166 return; 6167 abandon_assoc: 6168 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6169 goto notify_driver; 6170 } 6171 6172 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6173 struct ieee80211_mgmt *mgmt, size_t len, 6174 struct ieee80211_rx_status *rx_status) 6175 { 6176 struct ieee80211_sub_if_data *sdata = link->sdata; 6177 struct ieee80211_local *local = sdata->local; 6178 struct ieee80211_bss *bss; 6179 struct ieee80211_channel *channel; 6180 6181 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6182 6183 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6184 ieee80211_rx_status_to_khz(rx_status)); 6185 if (!channel) 6186 return; 6187 6188 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6189 if (bss) { 6190 link->conf->beacon_rate = bss->beacon_rate; 6191 ieee80211_rx_bss_put(local, bss); 6192 } 6193 } 6194 6195 6196 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6197 struct sk_buff *skb) 6198 { 6199 struct ieee80211_sub_if_data *sdata = link->sdata; 6200 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6201 struct ieee80211_if_managed *ifmgd; 6202 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6203 struct ieee80211_channel *channel; 6204 size_t baselen, len = skb->len; 6205 6206 ifmgd = &sdata->u.mgd; 6207 6208 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6209 6210 /* 6211 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6212 * "If a 6 GHz AP receives a Probe Request frame and responds with 6213 * a Probe Response frame [..], the Address 1 field of the Probe 6214 * Response frame shall be set to the broadcast address [..]" 6215 * So, on 6GHz band we should also accept broadcast responses. 6216 */ 6217 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 6218 rx_status->freq); 6219 if (!channel) 6220 return; 6221 6222 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6223 (channel->band != NL80211_BAND_6GHZ || 6224 !is_broadcast_ether_addr(mgmt->da))) 6225 return; /* ignore ProbeResp to foreign address */ 6226 6227 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6228 if (baselen > len) 6229 return; 6230 6231 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6232 6233 if (ifmgd->associated && 6234 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6235 ieee80211_reset_ap_probe(sdata); 6236 } 6237 6238 /* 6239 * This is the canonical list of information elements we care about, 6240 * the filter code also gives us all changes to the Microsoft OUI 6241 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6242 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6243 * changes to requested client power. 6244 * 6245 * We implement beacon filtering in software since that means we can 6246 * avoid processing the frame here and in cfg80211, and userspace 6247 * will not be able to tell whether the hardware supports it or not. 6248 * 6249 * XXX: This list needs to be dynamic -- userspace needs to be able to 6250 * add items it requires. It also needs to be able to tell us to 6251 * look out for other vendor IEs. 6252 */ 6253 static const u64 care_about_ies = 6254 (1ULL << WLAN_EID_COUNTRY) | 6255 (1ULL << WLAN_EID_ERP_INFO) | 6256 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6257 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6258 (1ULL << WLAN_EID_HT_CAPABILITY) | 6259 (1ULL << WLAN_EID_HT_OPERATION) | 6260 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6261 6262 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6263 struct ieee80211_if_managed *ifmgd, 6264 struct ieee80211_bss_conf *bss_conf, 6265 struct ieee80211_local *local, 6266 struct ieee80211_rx_status *rx_status) 6267 { 6268 struct ieee80211_sub_if_data *sdata = link->sdata; 6269 6270 /* Track average RSSI from the Beacon frames of the current AP */ 6271 6272 if (!link->u.mgd.tracking_signal_avg) { 6273 link->u.mgd.tracking_signal_avg = true; 6274 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6275 link->u.mgd.last_cqm_event_signal = 0; 6276 link->u.mgd.count_beacon_signal = 1; 6277 link->u.mgd.last_ave_beacon_signal = 0; 6278 } else { 6279 link->u.mgd.count_beacon_signal++; 6280 } 6281 6282 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6283 -rx_status->signal); 6284 6285 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6286 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6287 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6288 int last_sig = link->u.mgd.last_ave_beacon_signal; 6289 struct ieee80211_event event = { 6290 .type = RSSI_EVENT, 6291 }; 6292 6293 /* 6294 * if signal crosses either of the boundaries, invoke callback 6295 * with appropriate parameters 6296 */ 6297 if (sig > ifmgd->rssi_max_thold && 6298 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6299 link->u.mgd.last_ave_beacon_signal = sig; 6300 event.u.rssi.data = RSSI_EVENT_HIGH; 6301 drv_event_callback(local, sdata, &event); 6302 } else if (sig < ifmgd->rssi_min_thold && 6303 (last_sig >= ifmgd->rssi_max_thold || 6304 last_sig == 0)) { 6305 link->u.mgd.last_ave_beacon_signal = sig; 6306 event.u.rssi.data = RSSI_EVENT_LOW; 6307 drv_event_callback(local, sdata, &event); 6308 } 6309 } 6310 6311 if (bss_conf->cqm_rssi_thold && 6312 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6313 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6314 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6315 int last_event = link->u.mgd.last_cqm_event_signal; 6316 int thold = bss_conf->cqm_rssi_thold; 6317 int hyst = bss_conf->cqm_rssi_hyst; 6318 6319 if (sig < thold && 6320 (last_event == 0 || sig < last_event - hyst)) { 6321 link->u.mgd.last_cqm_event_signal = sig; 6322 ieee80211_cqm_rssi_notify( 6323 &sdata->vif, 6324 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6325 sig, GFP_KERNEL); 6326 } else if (sig > thold && 6327 (last_event == 0 || sig > last_event + hyst)) { 6328 link->u.mgd.last_cqm_event_signal = sig; 6329 ieee80211_cqm_rssi_notify( 6330 &sdata->vif, 6331 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6332 sig, GFP_KERNEL); 6333 } 6334 } 6335 6336 if (bss_conf->cqm_rssi_low && 6337 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6338 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6339 int last_event = link->u.mgd.last_cqm_event_signal; 6340 int low = bss_conf->cqm_rssi_low; 6341 int high = bss_conf->cqm_rssi_high; 6342 6343 if (sig < low && 6344 (last_event == 0 || last_event >= low)) { 6345 link->u.mgd.last_cqm_event_signal = sig; 6346 ieee80211_cqm_rssi_notify( 6347 &sdata->vif, 6348 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6349 sig, GFP_KERNEL); 6350 } else if (sig > high && 6351 (last_event == 0 || last_event <= high)) { 6352 link->u.mgd.last_cqm_event_signal = sig; 6353 ieee80211_cqm_rssi_notify( 6354 &sdata->vif, 6355 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6356 sig, GFP_KERNEL); 6357 } 6358 } 6359 } 6360 6361 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6362 struct cfg80211_bss *bss) 6363 { 6364 if (ether_addr_equal(tx_bssid, bss->bssid)) 6365 return true; 6366 if (!bss->transmitted_bss) 6367 return false; 6368 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6369 } 6370 6371 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6372 struct wiphy_work *work) 6373 { 6374 struct ieee80211_sub_if_data *sdata = 6375 container_of(work, struct ieee80211_sub_if_data, 6376 u.mgd.ml_reconf_work.work); 6377 u16 new_valid_links, new_active_links, new_dormant_links; 6378 int ret; 6379 6380 if (!sdata->u.mgd.removed_links) 6381 return; 6382 6383 sdata_info(sdata, 6384 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6385 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6386 6387 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6388 if (new_valid_links == sdata->vif.valid_links) 6389 return; 6390 6391 if (!new_valid_links || 6392 !(new_valid_links & ~sdata->vif.dormant_links)) { 6393 sdata_info(sdata, "No valid links after reconfiguration\n"); 6394 ret = -EINVAL; 6395 goto out; 6396 } 6397 6398 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6399 if (new_active_links != sdata->vif.active_links) { 6400 if (!new_active_links) 6401 new_active_links = 6402 BIT(ffs(new_valid_links & 6403 ~sdata->vif.dormant_links) - 1); 6404 6405 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6406 if (ret) { 6407 sdata_info(sdata, 6408 "Failed setting active links\n"); 6409 goto out; 6410 } 6411 } 6412 6413 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6414 6415 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6416 new_dormant_links); 6417 if (ret) 6418 sdata_info(sdata, "Failed setting valid links\n"); 6419 6420 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6421 6422 out: 6423 if (!ret) 6424 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6425 else 6426 __ieee80211_disconnect(sdata); 6427 6428 sdata->u.mgd.removed_links = 0; 6429 } 6430 6431 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6432 struct ieee802_11_elems *elems) 6433 { 6434 const struct element *sub; 6435 unsigned long removed_links = 0; 6436 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6437 u8 link_id; 6438 u32 delay; 6439 6440 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6441 return; 6442 6443 /* Directly parse the sub elements as the common information doesn't 6444 * hold any useful information. 6445 */ 6446 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6447 elems->ml_reconf_len) { 6448 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6449 u8 *pos = prof->variable; 6450 u16 control; 6451 6452 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6453 continue; 6454 6455 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6456 sub->datalen)) 6457 return; 6458 6459 control = le16_to_cpu(prof->control); 6460 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6461 6462 removed_links |= BIT(link_id); 6463 6464 /* the MAC address should not be included, but handle it */ 6465 if (control & 6466 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6467 pos += 6; 6468 6469 /* According to Draft P802.11be_D3.0, the control should 6470 * include the AP Removal Timer present. If the AP Removal Timer 6471 * is not present assume immediate removal. 6472 */ 6473 if (control & 6474 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6475 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6476 } 6477 6478 removed_links &= sdata->vif.valid_links; 6479 if (!removed_links) { 6480 /* In case the removal was cancelled, abort it */ 6481 if (sdata->u.mgd.removed_links) { 6482 sdata->u.mgd.removed_links = 0; 6483 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6484 &sdata->u.mgd.ml_reconf_work); 6485 } 6486 return; 6487 } 6488 6489 delay = 0; 6490 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6491 struct ieee80211_bss_conf *link_conf = 6492 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6493 u32 link_delay; 6494 6495 if (!link_conf) { 6496 removed_links &= ~BIT(link_id); 6497 continue; 6498 } 6499 6500 if (link_removal_timeout[link_id] < 1) 6501 link_delay = 0; 6502 else 6503 link_delay = link_conf->beacon_int * 6504 (link_removal_timeout[link_id] - 1); 6505 6506 if (!delay) 6507 delay = link_delay; 6508 else 6509 delay = min(delay, link_delay); 6510 } 6511 6512 sdata->u.mgd.removed_links = removed_links; 6513 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6514 &sdata->u.mgd.ml_reconf_work, 6515 TU_TO_JIFFIES(delay)); 6516 } 6517 6518 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6519 u16 active_links, u16 dormant_links, 6520 u16 suspended_links) 6521 { 6522 u64 changed = 0; 6523 int ret; 6524 6525 if (!active_links) { 6526 ret = -EINVAL; 6527 goto out; 6528 } 6529 6530 /* If there is an active negotiated TTLM, it should be discarded by 6531 * the new negotiated/advertised TTLM. 6532 */ 6533 if (sdata->vif.neg_ttlm.valid) { 6534 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6535 sdata->vif.suspended_links = 0; 6536 changed = BSS_CHANGED_MLD_TTLM; 6537 } 6538 6539 if (sdata->vif.active_links != active_links) { 6540 /* usable links are affected when active_links are changed, 6541 * so notify the driver about the status change 6542 */ 6543 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6544 active_links &= sdata->vif.active_links; 6545 if (!active_links) 6546 active_links = 6547 BIT(__ffs(sdata->vif.valid_links & 6548 ~dormant_links)); 6549 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6550 if (ret) { 6551 sdata_info(sdata, "Failed to set TTLM active links\n"); 6552 goto out; 6553 } 6554 } 6555 6556 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6557 dormant_links); 6558 if (ret) { 6559 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6560 goto out; 6561 } 6562 6563 sdata->vif.suspended_links = suspended_links; 6564 if (sdata->vif.suspended_links) 6565 changed |= BSS_CHANGED_MLD_TTLM; 6566 6567 ieee80211_vif_cfg_change_notify(sdata, changed); 6568 6569 out: 6570 if (ret) 6571 ieee80211_disconnect(&sdata->vif, false); 6572 6573 return ret; 6574 } 6575 6576 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6577 struct wiphy_work *work) 6578 { 6579 u16 new_active_links, new_dormant_links; 6580 struct ieee80211_sub_if_data *sdata = 6581 container_of(work, struct ieee80211_sub_if_data, 6582 u.mgd.ttlm_work.work); 6583 6584 new_active_links = sdata->u.mgd.ttlm_info.map & 6585 sdata->vif.valid_links; 6586 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6587 sdata->vif.valid_links; 6588 6589 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6590 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6591 0)) 6592 return; 6593 6594 sdata->u.mgd.ttlm_info.active = true; 6595 sdata->u.mgd.ttlm_info.switch_time = 0; 6596 } 6597 6598 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6599 { 6600 if (bm_size == 1) 6601 return *data; 6602 else 6603 return get_unaligned_le16(data); 6604 } 6605 6606 static int 6607 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6608 const struct ieee80211_ttlm_elem *ttlm, 6609 struct ieee80211_adv_ttlm_info *ttlm_info) 6610 { 6611 /* The element size was already validated in 6612 * ieee80211_tid_to_link_map_size_ok() 6613 */ 6614 u8 control, link_map_presence, map_size, tid; 6615 u8 *pos; 6616 6617 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6618 pos = (void *)ttlm->optional; 6619 control = ttlm->control; 6620 6621 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 6622 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 6623 return 0; 6624 6625 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6626 IEEE80211_TTLM_DIRECTION_BOTH) { 6627 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6628 return -EINVAL; 6629 } 6630 6631 link_map_presence = *pos; 6632 pos++; 6633 6634 ttlm_info->switch_time = get_unaligned_le16(pos); 6635 6636 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 6637 * by 1. 6638 */ 6639 if (!ttlm_info->switch_time) 6640 ttlm_info->switch_time = 1; 6641 6642 pos += 2; 6643 6644 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6645 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6646 pos += 3; 6647 } 6648 6649 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6650 map_size = 1; 6651 else 6652 map_size = 2; 6653 6654 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6655 * not advertise a TID-to-link mapping that does not map all TIDs to the 6656 * same link set, reject frame if not all links have mapping 6657 */ 6658 if (link_map_presence != 0xff) { 6659 sdata_info(sdata, 6660 "Invalid advertised T2L mapping presence indicator\n"); 6661 return -EINVAL; 6662 } 6663 6664 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6665 if (!ttlm_info->map) { 6666 sdata_info(sdata, 6667 "Invalid advertised T2L map for TID 0\n"); 6668 return -EINVAL; 6669 } 6670 6671 pos += map_size; 6672 6673 for (tid = 1; tid < 8; tid++) { 6674 u16 map = ieee80211_get_ttlm(map_size, pos); 6675 6676 if (map != ttlm_info->map) { 6677 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6678 tid); 6679 return -EINVAL; 6680 } 6681 6682 pos += map_size; 6683 } 6684 return 0; 6685 } 6686 6687 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6688 struct ieee802_11_elems *elems, 6689 u64 beacon_ts) 6690 { 6691 u8 i; 6692 int ret; 6693 6694 if (!ieee80211_vif_is_mld(&sdata->vif)) 6695 return; 6696 6697 if (!elems->ttlm_num) { 6698 if (sdata->u.mgd.ttlm_info.switch_time) { 6699 /* if a planned TID-to-link mapping was cancelled - 6700 * abort it 6701 */ 6702 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6703 &sdata->u.mgd.ttlm_work); 6704 } else if (sdata->u.mgd.ttlm_info.active) { 6705 /* if no TID-to-link element, set to default mapping in 6706 * which all TIDs are mapped to all setup links 6707 */ 6708 ret = ieee80211_vif_set_links(sdata, 6709 sdata->vif.valid_links, 6710 0); 6711 if (ret) { 6712 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6713 return; 6714 } 6715 ieee80211_vif_cfg_change_notify(sdata, 6716 BSS_CHANGED_MLD_VALID_LINKS); 6717 } 6718 memset(&sdata->u.mgd.ttlm_info, 0, 6719 sizeof(sdata->u.mgd.ttlm_info)); 6720 return; 6721 } 6722 6723 for (i = 0; i < elems->ttlm_num; i++) { 6724 struct ieee80211_adv_ttlm_info ttlm_info; 6725 u32 res; 6726 6727 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6728 &ttlm_info); 6729 6730 if (res) { 6731 __ieee80211_disconnect(sdata); 6732 return; 6733 } 6734 6735 if (ttlm_info.switch_time) { 6736 u16 beacon_ts_tu, st_tu, delay; 6737 u32 delay_jiffies; 6738 u64 mask; 6739 6740 /* The t2l map switch time is indicated with a partial 6741 * TSF value (bits 10 to 25), get the partial beacon TS 6742 * as well, and calc the delay to the start time. 6743 */ 6744 mask = GENMASK_ULL(25, 10); 6745 beacon_ts_tu = (beacon_ts & mask) >> 10; 6746 st_tu = ttlm_info.switch_time; 6747 delay = st_tu - beacon_ts_tu; 6748 6749 /* 6750 * If the switch time is far in the future, then it 6751 * could also be the previous switch still being 6752 * announced. 6753 * We can simply ignore it for now, if it is a future 6754 * switch the AP will continue to announce it anyway. 6755 */ 6756 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 6757 return; 6758 6759 delay_jiffies = TU_TO_JIFFIES(delay); 6760 6761 /* Link switching can take time, so schedule it 6762 * 100ms before to be ready on time 6763 */ 6764 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 6765 delay_jiffies -= 6766 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 6767 else 6768 delay_jiffies = 0; 6769 6770 sdata->u.mgd.ttlm_info = ttlm_info; 6771 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6772 &sdata->u.mgd.ttlm_work); 6773 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6774 &sdata->u.mgd.ttlm_work, 6775 delay_jiffies); 6776 return; 6777 } 6778 } 6779 } 6780 6781 static void 6782 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 6783 int reporting_link_id, 6784 struct ieee802_11_elems *elems) 6785 { 6786 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6787 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6788 const struct element *sub; 6789 const u8 *subelems; 6790 size_t subelems_len; 6791 u8 common_size; 6792 int link_id; 6793 6794 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 6795 return; 6796 6797 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 6798 subelems = (u8 *)elems->ml_basic + common_size; 6799 subelems_len = elems->ml_basic_len - common_size; 6800 6801 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 6802 subelems, subelems_len) { 6803 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6804 struct ieee80211_link_data *link; 6805 ssize_t len; 6806 6807 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 6808 sub->datalen)) 6809 continue; 6810 6811 link_id = le16_get_bits(prof->control, 6812 IEEE80211_MLE_STA_CONTROL_LINK_ID); 6813 /* need a valid link ID, but also not our own, both AP bugs */ 6814 if (link_id == reporting_link_id || 6815 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 6816 continue; 6817 6818 link = sdata_dereference(sdata->link[link_id], sdata); 6819 if (!link) 6820 continue; 6821 6822 len = cfg80211_defragment_element(sub, subelems, subelems_len, 6823 NULL, 0, 6824 IEEE80211_MLE_SUBELEM_FRAGMENT); 6825 if (WARN_ON(len < 0)) 6826 continue; 6827 6828 sta_profiles[link_id] = sub; 6829 sta_profiles_len[link_id] = len; 6830 } 6831 6832 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6833 struct ieee80211_mle_per_sta_profile *prof; 6834 struct ieee802_11_elems *prof_elems; 6835 struct ieee80211_link_data *link; 6836 ssize_t len; 6837 6838 if (link_id == reporting_link_id) 6839 continue; 6840 6841 link = sdata_dereference(sdata->link[link_id], sdata); 6842 if (!link) 6843 continue; 6844 6845 if (!sta_profiles[link_id]) { 6846 prof_elems = NULL; 6847 goto handle; 6848 } 6849 6850 /* we can defragment in-place, won't use the buffer again */ 6851 len = cfg80211_defragment_element(sta_profiles[link_id], 6852 subelems, subelems_len, 6853 (void *)sta_profiles[link_id], 6854 sta_profiles_len[link_id], 6855 IEEE80211_MLE_SUBELEM_FRAGMENT); 6856 if (WARN_ON(len != sta_profiles_len[link_id])) 6857 continue; 6858 6859 prof = (void *)sta_profiles[link_id]; 6860 prof_elems = ieee802_11_parse_elems(prof->variable + 6861 (prof->sta_info_len - 1), 6862 len - 6863 (prof->sta_info_len - 1), 6864 false, NULL); 6865 6866 /* memory allocation failed - let's hope that's transient */ 6867 if (!prof_elems) 6868 continue; 6869 6870 handle: 6871 /* 6872 * FIXME: the timings here are obviously incorrect, 6873 * but only older Intel drivers seem to care, and 6874 * those don't have MLO. If you really need this, 6875 * the problem is having to calculate it with the 6876 * TSF offset etc. The device_timestamp is still 6877 * correct, of course. 6878 */ 6879 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 6880 IEEE80211_CSA_SOURCE_OTHER_LINK); 6881 kfree(prof_elems); 6882 } 6883 } 6884 6885 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 6886 const struct ieee802_11_elems *elems) 6887 { 6888 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 6889 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 6890 6891 if (!elems->ssid) 6892 return false; 6893 6894 /* hidden SSID: zero length */ 6895 if (elems->ssid_len == 0) 6896 return false; 6897 6898 if (elems->ssid_len != cfg->ssid_len) 6899 return true; 6900 6901 /* hidden SSID: zeroed out */ 6902 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 6903 return false; 6904 6905 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 6906 } 6907 6908 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 6909 struct ieee80211_hdr *hdr, size_t len, 6910 struct ieee80211_rx_status *rx_status) 6911 { 6912 struct ieee80211_sub_if_data *sdata = link->sdata; 6913 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6914 struct ieee80211_bss_conf *bss_conf = link->conf; 6915 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6916 struct ieee80211_mgmt *mgmt = (void *) hdr; 6917 size_t baselen; 6918 struct ieee802_11_elems *elems; 6919 struct ieee80211_local *local = sdata->local; 6920 struct ieee80211_chanctx_conf *chanctx_conf; 6921 struct ieee80211_supported_band *sband; 6922 struct ieee80211_channel *chan; 6923 struct link_sta_info *link_sta; 6924 struct sta_info *sta; 6925 u64 changed = 0; 6926 bool erp_valid; 6927 u8 erp_value = 0; 6928 u32 ncrc = 0; 6929 u8 *bssid, *variable = mgmt->u.beacon.variable; 6930 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6931 struct ieee80211_elems_parse_params parse_params = { 6932 .mode = link->u.mgd.conn.mode, 6933 .link_id = -1, 6934 .from_ap = true, 6935 }; 6936 6937 lockdep_assert_wiphy(local->hw.wiphy); 6938 6939 /* Process beacon from the current BSS */ 6940 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 6941 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 6942 struct ieee80211_ext *ext = (void *) mgmt; 6943 6944 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 6945 variable = ext->u.s1g_short_beacon.variable; 6946 else 6947 variable = ext->u.s1g_beacon.variable; 6948 } 6949 6950 baselen = (u8 *) variable - (u8 *) mgmt; 6951 if (baselen > len) 6952 return; 6953 6954 parse_params.start = variable; 6955 parse_params.len = len - baselen; 6956 6957 rcu_read_lock(); 6958 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 6959 if (!chanctx_conf) { 6960 rcu_read_unlock(); 6961 return; 6962 } 6963 6964 if (ieee80211_rx_status_to_khz(rx_status) != 6965 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 6966 rcu_read_unlock(); 6967 return; 6968 } 6969 chan = chanctx_conf->def.chan; 6970 rcu_read_unlock(); 6971 6972 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 6973 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 6974 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 6975 parse_params.bss = ifmgd->assoc_data->link[0].bss; 6976 elems = ieee802_11_parse_elems_full(&parse_params); 6977 if (!elems) 6978 return; 6979 6980 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6981 6982 if (elems->dtim_period) 6983 link->u.mgd.dtim_period = elems->dtim_period; 6984 link->u.mgd.have_beacon = true; 6985 ifmgd->assoc_data->need_beacon = false; 6986 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6987 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6988 bss_conf->sync_tsf = 6989 le64_to_cpu(mgmt->u.beacon.timestamp); 6990 bss_conf->sync_device_ts = 6991 rx_status->device_timestamp; 6992 bss_conf->sync_dtim_count = elems->dtim_count; 6993 } 6994 6995 if (elems->mbssid_config_ie) 6996 bss_conf->profile_periodicity = 6997 elems->mbssid_config_ie->profile_periodicity; 6998 else 6999 bss_conf->profile_periodicity = 0; 7000 7001 if (elems->ext_capab_len >= 11 && 7002 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7003 bss_conf->ema_ap = true; 7004 else 7005 bss_conf->ema_ap = false; 7006 7007 /* continue assoc process */ 7008 ifmgd->assoc_data->timeout = jiffies; 7009 ifmgd->assoc_data->timeout_started = true; 7010 run_again(sdata, ifmgd->assoc_data->timeout); 7011 kfree(elems); 7012 return; 7013 } 7014 7015 if (!ifmgd->associated || 7016 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7017 return; 7018 bssid = link->u.mgd.bssid; 7019 7020 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7021 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7022 local, rx_status); 7023 7024 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7025 mlme_dbg_ratelimited(sdata, 7026 "cancelling AP probe due to a received beacon\n"); 7027 ieee80211_reset_ap_probe(sdata); 7028 } 7029 7030 /* 7031 * Push the beacon loss detection into the future since 7032 * we are processing a beacon from the AP just now. 7033 */ 7034 ieee80211_sta_reset_beacon_monitor(sdata); 7035 7036 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7037 * element (which carries the beacon interval). Don't forget to add a 7038 * bit to care_about_ies[] above if mac80211 is interested in a 7039 * changing S1G element. 7040 */ 7041 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7042 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7043 parse_params.bss = bss_conf->bss; 7044 parse_params.filter = care_about_ies; 7045 parse_params.crc = ncrc; 7046 elems = ieee802_11_parse_elems_full(&parse_params); 7047 if (!elems) 7048 return; 7049 7050 if (rx_status->flag & RX_FLAG_DECRYPTED && 7051 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7052 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7053 sdata->vif.cfg.ap_addr); 7054 __ieee80211_disconnect(sdata); 7055 return; 7056 } 7057 7058 ncrc = elems->crc; 7059 7060 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7061 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 7062 if (local->hw.conf.dynamic_ps_timeout > 0) { 7063 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7064 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7065 ieee80211_hw_config(local, 7066 IEEE80211_CONF_CHANGE_PS); 7067 } 7068 ieee80211_send_nullfunc(local, sdata, false); 7069 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7070 local->pspolling = true; 7071 7072 /* 7073 * Here is assumed that the driver will be 7074 * able to send ps-poll frame and receive a 7075 * response even though power save mode is 7076 * enabled, but some drivers might require 7077 * to disable power save here. This needs 7078 * to be investigated. 7079 */ 7080 ieee80211_send_pspoll(local, sdata); 7081 } 7082 } 7083 7084 if (sdata->vif.p2p || 7085 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7086 struct ieee80211_p2p_noa_attr noa = {}; 7087 int ret; 7088 7089 ret = cfg80211_get_p2p_attr(variable, 7090 len - baselen, 7091 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7092 (u8 *) &noa, sizeof(noa)); 7093 if (ret >= 2) { 7094 if (link->u.mgd.p2p_noa_index != noa.index) { 7095 /* valid noa_attr and index changed */ 7096 link->u.mgd.p2p_noa_index = noa.index; 7097 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7098 changed |= BSS_CHANGED_P2P_PS; 7099 /* 7100 * make sure we update all information, the CRC 7101 * mechanism doesn't look at P2P attributes. 7102 */ 7103 link->u.mgd.beacon_crc_valid = false; 7104 } 7105 } else if (link->u.mgd.p2p_noa_index != -1) { 7106 /* noa_attr not found and we had valid noa_attr before */ 7107 link->u.mgd.p2p_noa_index = -1; 7108 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7109 changed |= BSS_CHANGED_P2P_PS; 7110 link->u.mgd.beacon_crc_valid = false; 7111 } 7112 } 7113 7114 /* 7115 * Update beacon timing and dtim count on every beacon appearance. This 7116 * will allow the driver to use the most updated values. Do it before 7117 * comparing this one with last received beacon. 7118 * IMPORTANT: These parameters would possibly be out of sync by the time 7119 * the driver will use them. The synchronized view is currently 7120 * guaranteed only in certain callbacks. 7121 */ 7122 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7123 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7124 bss_conf->sync_tsf = 7125 le64_to_cpu(mgmt->u.beacon.timestamp); 7126 bss_conf->sync_device_ts = 7127 rx_status->device_timestamp; 7128 bss_conf->sync_dtim_count = elems->dtim_count; 7129 } 7130 7131 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7132 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 7133 goto free; 7134 link->u.mgd.beacon_crc = ncrc; 7135 link->u.mgd.beacon_crc_valid = true; 7136 7137 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7138 7139 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7140 rx_status->device_timestamp, 7141 elems, elems, 7142 IEEE80211_CSA_SOURCE_BEACON); 7143 7144 /* note that after this elems->ml_basic can no longer be used fully */ 7145 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7146 7147 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7148 7149 if (!link->u.mgd.disable_wmm_tracking && 7150 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7151 elems->wmm_param_len, 7152 elems->mu_edca_param_set)) 7153 changed |= BSS_CHANGED_QOS; 7154 7155 /* 7156 * If we haven't had a beacon before, tell the driver about the 7157 * DTIM period (and beacon timing if desired) now. 7158 */ 7159 if (!link->u.mgd.have_beacon) { 7160 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7161 bss_conf->dtim_period = elems->dtim_period ?: 1; 7162 7163 changed |= BSS_CHANGED_BEACON_INFO; 7164 link->u.mgd.have_beacon = true; 7165 7166 ieee80211_recalc_ps(local); 7167 7168 ieee80211_recalc_ps_vif(sdata); 7169 } 7170 7171 if (elems->erp_info) { 7172 erp_valid = true; 7173 erp_value = elems->erp_info[0]; 7174 } else { 7175 erp_valid = false; 7176 } 7177 7178 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7179 changed |= ieee80211_handle_bss_capability(link, 7180 le16_to_cpu(mgmt->u.beacon.capab_info), 7181 erp_valid, erp_value); 7182 7183 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7184 if (WARN_ON(!sta)) { 7185 goto free; 7186 } 7187 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7188 lockdep_is_held(&local->hw.wiphy->mtx)); 7189 if (WARN_ON(!link_sta)) { 7190 goto free; 7191 } 7192 7193 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7194 goto free; 7195 7196 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7197 7198 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7199 7200 if (ieee80211_config_bw(link, elems, true, &changed, "beacon")) { 7201 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7202 WLAN_REASON_DEAUTH_LEAVING, 7203 true, deauth_buf); 7204 ieee80211_report_disconnect(sdata, deauth_buf, 7205 sizeof(deauth_buf), true, 7206 WLAN_REASON_DEAUTH_LEAVING, 7207 false); 7208 goto free; 7209 } 7210 7211 if (elems->opmode_notif) 7212 ieee80211_vht_handle_opmode(sdata, link_sta, 7213 *elems->opmode_notif, 7214 rx_status->band); 7215 7216 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7217 elems->country_elem, 7218 elems->country_elem_len, 7219 elems->pwr_constr_elem, 7220 elems->cisco_dtpc_elem); 7221 7222 ieee80211_ml_reconfiguration(sdata, elems); 7223 ieee80211_process_adv_ttlm(sdata, elems, 7224 le64_to_cpu(mgmt->u.beacon.timestamp)); 7225 7226 ieee80211_link_info_change_notify(sdata, link, changed); 7227 free: 7228 kfree(elems); 7229 } 7230 7231 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7232 struct ieee80211_neg_ttlm neg_ttlm) 7233 { 7234 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7235 u8 i; 7236 7237 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7238 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7239 7240 /* If there is an active TTLM, unset previously suspended links */ 7241 if (sdata->vif.neg_ttlm.valid) 7242 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7243 7244 /* exclude links that are already disabled by advertised TTLM */ 7245 new_active_links = 7246 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7247 new_suspended_links = 7248 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7249 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7250 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7251 new_dormant_links, new_suspended_links)) 7252 return; 7253 7254 sdata->vif.neg_ttlm = neg_ttlm; 7255 sdata->vif.neg_ttlm.valid = true; 7256 } 7257 7258 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7259 struct wiphy_work *work) 7260 { 7261 struct ieee80211_sub_if_data *sdata = 7262 container_of(work, struct ieee80211_sub_if_data, 7263 u.mgd.neg_ttlm_timeout_work.work); 7264 7265 sdata_info(sdata, 7266 "No negotiated TTLM response from AP, disconnecting.\n"); 7267 7268 __ieee80211_disconnect(sdata); 7269 } 7270 7271 static void 7272 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7273 struct ieee80211_neg_ttlm *neg_ttlm) 7274 { 7275 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7276 7277 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7278 sizeof(neg_ttlm->downlink))) { 7279 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7280 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7281 } else { 7282 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7283 } 7284 7285 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7286 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7287 __le16 map; 7288 7289 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7290 7291 pos = skb_put(skb, len + 2); 7292 *pos++ = WLAN_EID_EXTENSION; 7293 len_pos = pos++; 7294 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7295 *pos++ = direction[i]; 7296 map_ind_pos = pos++; 7297 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7298 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7299 cpu_to_le16(neg_ttlm->uplink[tid]) : 7300 cpu_to_le16(neg_ttlm->downlink[tid]); 7301 if (!map) 7302 continue; 7303 7304 len += 2; 7305 map_ind |= BIT(tid); 7306 skb_put_data(skb, &map, sizeof(map)); 7307 } 7308 7309 *map_ind_pos = map_ind; 7310 *len_pos = len; 7311 7312 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7313 break; 7314 } 7315 } 7316 7317 static void 7318 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7319 struct ieee80211_neg_ttlm *neg_ttlm, 7320 u8 dialog_token) 7321 { 7322 struct ieee80211_local *local = sdata->local; 7323 struct ieee80211_mgmt *mgmt; 7324 struct sk_buff *skb; 7325 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7326 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7327 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7328 7329 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7330 if (!skb) 7331 return; 7332 7333 skb_reserve(skb, local->tx_headroom); 7334 mgmt = skb_put_zero(skb, hdr_len); 7335 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7336 IEEE80211_STYPE_ACTION); 7337 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7338 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7339 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7340 7341 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7342 mgmt->u.action.u.ttlm_req.action_code = 7343 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7344 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7345 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7346 ieee80211_tx_skb(sdata, skb); 7347 } 7348 7349 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7350 struct cfg80211_ttlm_params *params) 7351 { 7352 struct ieee80211_neg_ttlm neg_ttlm = {}; 7353 u8 i; 7354 7355 if (!ieee80211_vif_is_mld(&sdata->vif) || 7356 !(sdata->vif.cfg.mld_capa_op & 7357 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7358 return -EINVAL; 7359 7360 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7361 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7362 (params->ulink[i] & ~sdata->vif.valid_links)) 7363 return -EINVAL; 7364 7365 neg_ttlm.downlink[i] = params->dlink[i]; 7366 neg_ttlm.uplink[i] = params->ulink[i]; 7367 } 7368 7369 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7370 NEG_TTLM_RES_ACCEPT) 7371 return -EINVAL; 7372 7373 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7374 sdata->u.mgd.dialog_token_alloc++; 7375 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7376 sdata->u.mgd.dialog_token_alloc); 7377 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7378 &sdata->u.mgd.neg_ttlm_timeout_work); 7379 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7380 &sdata->u.mgd.neg_ttlm_timeout_work, 7381 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7382 return 0; 7383 } 7384 7385 static void 7386 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7387 enum ieee80211_neg_ttlm_res ttlm_res, 7388 u8 dialog_token, 7389 struct ieee80211_neg_ttlm *neg_ttlm) 7390 { 7391 struct ieee80211_local *local = sdata->local; 7392 struct ieee80211_mgmt *mgmt; 7393 struct sk_buff *skb; 7394 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7395 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7396 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7397 7398 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7399 if (!skb) 7400 return; 7401 7402 skb_reserve(skb, local->tx_headroom); 7403 mgmt = skb_put_zero(skb, hdr_len); 7404 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7405 IEEE80211_STYPE_ACTION); 7406 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7407 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7408 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7409 7410 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7411 mgmt->u.action.u.ttlm_res.action_code = 7412 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7413 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7414 switch (ttlm_res) { 7415 default: 7416 WARN_ON(1); 7417 fallthrough; 7418 case NEG_TTLM_RES_REJECT: 7419 mgmt->u.action.u.ttlm_res.status_code = 7420 WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7421 break; 7422 case NEG_TTLM_RES_ACCEPT: 7423 mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS; 7424 break; 7425 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7426 mgmt->u.action.u.ttlm_res.status_code = 7427 WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7428 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7429 break; 7430 } 7431 7432 ieee80211_tx_skb(sdata, skb); 7433 } 7434 7435 static int 7436 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7437 const struct ieee80211_ttlm_elem *ttlm, 7438 struct ieee80211_neg_ttlm *neg_ttlm, 7439 u8 *direction) 7440 { 7441 u8 control, link_map_presence, map_size, tid; 7442 u8 *pos; 7443 7444 /* The element size was already validated in 7445 * ieee80211_tid_to_link_map_size_ok() 7446 */ 7447 pos = (void *)ttlm->optional; 7448 7449 control = ttlm->control; 7450 7451 /* mapping switch time and expected duration fields are not expected 7452 * in case of negotiated TTLM 7453 */ 7454 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7455 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7456 mlme_dbg(sdata, 7457 "Invalid TTLM element in negotiated TTLM request\n"); 7458 return -EINVAL; 7459 } 7460 7461 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7462 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7463 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7464 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7465 } 7466 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7467 return 0; 7468 } 7469 7470 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7471 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7472 *direction != IEEE80211_TTLM_DIRECTION_UP && 7473 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7474 return -EINVAL; 7475 7476 link_map_presence = *pos; 7477 pos++; 7478 7479 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7480 map_size = 1; 7481 else 7482 map_size = 2; 7483 7484 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7485 u16 map; 7486 7487 if (link_map_presence & BIT(tid)) { 7488 map = ieee80211_get_ttlm(map_size, pos); 7489 if (!map) { 7490 mlme_dbg(sdata, 7491 "No active links for TID %d", tid); 7492 return -EINVAL; 7493 } 7494 } else { 7495 map = 0; 7496 } 7497 7498 switch (*direction) { 7499 case IEEE80211_TTLM_DIRECTION_BOTH: 7500 neg_ttlm->downlink[tid] = map; 7501 neg_ttlm->uplink[tid] = map; 7502 break; 7503 case IEEE80211_TTLM_DIRECTION_DOWN: 7504 neg_ttlm->downlink[tid] = map; 7505 break; 7506 case IEEE80211_TTLM_DIRECTION_UP: 7507 neg_ttlm->uplink[tid] = map; 7508 break; 7509 default: 7510 return -EINVAL; 7511 } 7512 pos += map_size; 7513 } 7514 return 0; 7515 } 7516 7517 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7518 struct ieee80211_mgmt *mgmt, size_t len) 7519 { 7520 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7521 size_t ies_len; 7522 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7523 struct ieee802_11_elems *elems = NULL; 7524 struct ieee80211_neg_ttlm neg_ttlm = {}; 7525 7526 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7527 7528 if (!ieee80211_vif_is_mld(&sdata->vif)) 7529 return; 7530 7531 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7532 ies_len = len - offsetof(struct ieee80211_mgmt, 7533 u.action.u.ttlm_req.variable); 7534 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7535 ies_len, true, NULL); 7536 if (!elems) { 7537 ttlm_res = NEG_TTLM_RES_REJECT; 7538 goto out; 7539 } 7540 7541 for (i = 0; i < elems->ttlm_num; i++) { 7542 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7543 &neg_ttlm, &direction[i]) || 7544 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7545 elems->ttlm_num != 1)) { 7546 ttlm_res = NEG_TTLM_RES_REJECT; 7547 goto out; 7548 } 7549 } 7550 7551 if (!elems->ttlm_num || 7552 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7553 ttlm_res = NEG_TTLM_RES_REJECT; 7554 goto out; 7555 } 7556 7557 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7558 if ((neg_ttlm.downlink[i] && 7559 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7560 (neg_ttlm.uplink[i] && 7561 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7562 ttlm_res = NEG_TTLM_RES_REJECT; 7563 goto out; 7564 } 7565 } 7566 7567 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7568 7569 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 7570 goto out; 7571 7572 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7573 out: 7574 kfree(elems); 7575 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 7576 } 7577 7578 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7579 struct ieee80211_mgmt *mgmt, size_t len) 7580 { 7581 if (!ieee80211_vif_is_mld(&sdata->vif) || 7582 mgmt->u.action.u.ttlm_req.dialog_token != 7583 sdata->u.mgd.dialog_token_alloc) 7584 return; 7585 7586 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7587 &sdata->u.mgd.neg_ttlm_timeout_work); 7588 7589 /* MLD station sends a TID to link mapping request, mainly to handle 7590 * BTM (BSS transition management) request, in which case it needs to 7591 * restrict the active links set. 7592 * In this case it's not expected that the MLD AP will reject the 7593 * negotiated TTLM request. 7594 * This can be better implemented in the future, to handle request 7595 * rejections. 7596 */ 7597 if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS) 7598 __ieee80211_disconnect(sdata); 7599 } 7600 7601 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 7602 struct wiphy_work *work) 7603 { 7604 u16 new_dormant_links; 7605 struct ieee80211_sub_if_data *sdata = 7606 container_of(work, struct ieee80211_sub_if_data, 7607 u.mgd.teardown_ttlm_work); 7608 7609 if (!sdata->vif.neg_ttlm.valid) 7610 return; 7611 7612 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7613 new_dormant_links = 7614 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7615 sdata->vif.suspended_links = 0; 7616 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7617 new_dormant_links); 7618 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 7619 BSS_CHANGED_MLD_VALID_LINKS); 7620 } 7621 7622 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 7623 { 7624 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7625 struct ieee80211_local *local = sdata->local; 7626 struct ieee80211_mgmt *mgmt; 7627 struct sk_buff *skb; 7628 int frame_len = offsetofend(struct ieee80211_mgmt, 7629 u.action.u.ttlm_tear_down); 7630 struct ieee80211_tx_info *info; 7631 7632 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 7633 if (!skb) 7634 return; 7635 7636 skb_reserve(skb, local->hw.extra_tx_headroom); 7637 mgmt = skb_put_zero(skb, frame_len); 7638 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7639 IEEE80211_STYPE_ACTION); 7640 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7641 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7642 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7643 7644 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7645 mgmt->u.action.u.ttlm_tear_down.action_code = 7646 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 7647 7648 info = IEEE80211_SKB_CB(skb); 7649 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 7650 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 7651 ieee80211_tx_skb(sdata, skb); 7652 } 7653 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 7654 7655 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 7656 struct sk_buff *skb) 7657 { 7658 struct ieee80211_link_data *link = &sdata->deflink; 7659 struct ieee80211_rx_status *rx_status; 7660 struct ieee80211_hdr *hdr; 7661 u16 fc; 7662 7663 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7664 7665 rx_status = (struct ieee80211_rx_status *) skb->cb; 7666 hdr = (struct ieee80211_hdr *) skb->data; 7667 fc = le16_to_cpu(hdr->frame_control); 7668 7669 switch (fc & IEEE80211_FCTL_STYPE) { 7670 case IEEE80211_STYPE_S1G_BEACON: 7671 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 7672 break; 7673 } 7674 } 7675 7676 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 7677 struct sk_buff *skb) 7678 { 7679 struct ieee80211_link_data *link = &sdata->deflink; 7680 struct ieee80211_rx_status *rx_status; 7681 struct ieee802_11_elems *elems; 7682 struct ieee80211_mgmt *mgmt; 7683 u16 fc; 7684 int ies_len; 7685 7686 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7687 7688 rx_status = (struct ieee80211_rx_status *) skb->cb; 7689 mgmt = (struct ieee80211_mgmt *) skb->data; 7690 fc = le16_to_cpu(mgmt->frame_control); 7691 7692 if (rx_status->link_valid) { 7693 link = sdata_dereference(sdata->link[rx_status->link_id], 7694 sdata); 7695 if (!link) 7696 return; 7697 } 7698 7699 switch (fc & IEEE80211_FCTL_STYPE) { 7700 case IEEE80211_STYPE_BEACON: 7701 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 7702 skb->len, rx_status); 7703 break; 7704 case IEEE80211_STYPE_PROBE_RESP: 7705 ieee80211_rx_mgmt_probe_resp(link, skb); 7706 break; 7707 case IEEE80211_STYPE_AUTH: 7708 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 7709 break; 7710 case IEEE80211_STYPE_DEAUTH: 7711 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 7712 break; 7713 case IEEE80211_STYPE_DISASSOC: 7714 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 7715 break; 7716 case IEEE80211_STYPE_ASSOC_RESP: 7717 case IEEE80211_STYPE_REASSOC_RESP: 7718 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 7719 break; 7720 case IEEE80211_STYPE_ACTION: 7721 if (!sdata->u.mgd.associated || 7722 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 7723 break; 7724 7725 switch (mgmt->u.action.category) { 7726 case WLAN_CATEGORY_SPECTRUM_MGMT: 7727 ies_len = skb->len - 7728 offsetof(struct ieee80211_mgmt, 7729 u.action.u.chan_switch.variable); 7730 7731 if (ies_len < 0) 7732 break; 7733 7734 /* CSA IE cannot be overridden, no need for BSSID */ 7735 elems = ieee802_11_parse_elems( 7736 mgmt->u.action.u.chan_switch.variable, 7737 ies_len, true, NULL); 7738 7739 if (elems && !elems->parse_error) { 7740 enum ieee80211_csa_source src = 7741 IEEE80211_CSA_SOURCE_PROT_ACTION; 7742 7743 ieee80211_sta_process_chanswitch(link, 7744 rx_status->mactime, 7745 rx_status->device_timestamp, 7746 elems, elems, 7747 src); 7748 } 7749 kfree(elems); 7750 break; 7751 case WLAN_CATEGORY_PUBLIC: 7752 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 7753 ies_len = skb->len - 7754 offsetof(struct ieee80211_mgmt, 7755 u.action.u.ext_chan_switch.variable); 7756 7757 if (ies_len < 0) 7758 break; 7759 7760 /* 7761 * extended CSA IE can't be overridden, no need for 7762 * BSSID 7763 */ 7764 elems = ieee802_11_parse_elems( 7765 mgmt->u.action.u.ext_chan_switch.variable, 7766 ies_len, true, NULL); 7767 7768 if (elems && !elems->parse_error) { 7769 enum ieee80211_csa_source src; 7770 7771 if (mgmt->u.action.category == 7772 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 7773 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 7774 else 7775 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 7776 7777 /* for the handling code pretend it was an IE */ 7778 elems->ext_chansw_ie = 7779 &mgmt->u.action.u.ext_chan_switch.data; 7780 7781 ieee80211_sta_process_chanswitch(link, 7782 rx_status->mactime, 7783 rx_status->device_timestamp, 7784 elems, elems, 7785 src); 7786 } 7787 7788 kfree(elems); 7789 break; 7790 } 7791 break; 7792 } 7793 } 7794 7795 static void ieee80211_sta_timer(struct timer_list *t) 7796 { 7797 struct ieee80211_sub_if_data *sdata = 7798 from_timer(sdata, t, u.mgd.timer); 7799 7800 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 7801 } 7802 7803 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 7804 u8 reason, bool tx) 7805 { 7806 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7807 7808 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 7809 tx, frame_buf); 7810 7811 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7812 reason, false); 7813 } 7814 7815 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 7816 { 7817 struct ieee80211_local *local = sdata->local; 7818 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7819 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 7820 u32 tx_flags = 0; 7821 u16 trans = 1; 7822 u16 status = 0; 7823 struct ieee80211_prep_tx_info info = { 7824 .subtype = IEEE80211_STYPE_AUTH, 7825 }; 7826 7827 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7828 7829 if (WARN_ON_ONCE(!auth_data)) 7830 return -EINVAL; 7831 7832 auth_data->tries++; 7833 7834 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 7835 sdata_info(sdata, "authentication with %pM timed out\n", 7836 auth_data->ap_addr); 7837 7838 /* 7839 * Most likely AP is not in the range so remove the 7840 * bss struct for that AP. 7841 */ 7842 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 7843 7844 return -ETIMEDOUT; 7845 } 7846 7847 if (auth_data->algorithm == WLAN_AUTH_SAE) 7848 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 7849 7850 info.link_id = auth_data->link_id; 7851 drv_mgd_prepare_tx(local, sdata, &info); 7852 7853 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 7854 auth_data->ap_addr, auth_data->tries, 7855 IEEE80211_AUTH_MAX_TRIES); 7856 7857 auth_data->expected_transaction = 2; 7858 7859 if (auth_data->algorithm == WLAN_AUTH_SAE) { 7860 trans = auth_data->sae_trans; 7861 status = auth_data->sae_status; 7862 auth_data->expected_transaction = trans; 7863 } 7864 7865 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7866 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 7867 IEEE80211_TX_INTFL_MLME_CONN_TX; 7868 7869 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 7870 auth_data->data, auth_data->data_len, 7871 auth_data->ap_addr, auth_data->ap_addr, 7872 NULL, 0, 0, tx_flags); 7873 7874 if (tx_flags == 0) { 7875 if (auth_data->algorithm == WLAN_AUTH_SAE) 7876 auth_data->timeout = jiffies + 7877 IEEE80211_AUTH_TIMEOUT_SAE; 7878 else 7879 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 7880 } else { 7881 auth_data->timeout = 7882 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 7883 } 7884 7885 auth_data->timeout_started = true; 7886 run_again(sdata, auth_data->timeout); 7887 7888 return 0; 7889 } 7890 7891 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 7892 { 7893 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 7894 struct ieee80211_local *local = sdata->local; 7895 int ret; 7896 7897 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7898 7899 assoc_data->tries++; 7900 assoc_data->comeback = false; 7901 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 7902 sdata_info(sdata, "association with %pM timed out\n", 7903 assoc_data->ap_addr); 7904 7905 /* 7906 * Most likely AP is not in the range so remove the 7907 * bss struct for that AP. 7908 */ 7909 cfg80211_unlink_bss(local->hw.wiphy, 7910 assoc_data->link[assoc_data->assoc_link_id].bss); 7911 7912 return -ETIMEDOUT; 7913 } 7914 7915 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 7916 assoc_data->ap_addr, assoc_data->tries, 7917 IEEE80211_ASSOC_MAX_TRIES); 7918 ret = ieee80211_send_assoc(sdata); 7919 if (ret) 7920 return ret; 7921 7922 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7923 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 7924 assoc_data->timeout_started = true; 7925 run_again(sdata, assoc_data->timeout); 7926 } else { 7927 assoc_data->timeout = 7928 round_jiffies_up(jiffies + 7929 IEEE80211_ASSOC_TIMEOUT_LONG); 7930 assoc_data->timeout_started = true; 7931 run_again(sdata, assoc_data->timeout); 7932 } 7933 7934 return 0; 7935 } 7936 7937 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 7938 __le16 fc, bool acked) 7939 { 7940 struct ieee80211_local *local = sdata->local; 7941 7942 sdata->u.mgd.status_fc = fc; 7943 sdata->u.mgd.status_acked = acked; 7944 sdata->u.mgd.status_received = true; 7945 7946 wiphy_work_queue(local->hw.wiphy, &sdata->work); 7947 } 7948 7949 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 7950 { 7951 struct ieee80211_local *local = sdata->local; 7952 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7953 7954 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7955 7956 if (ifmgd->status_received) { 7957 __le16 fc = ifmgd->status_fc; 7958 bool status_acked = ifmgd->status_acked; 7959 7960 ifmgd->status_received = false; 7961 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 7962 if (status_acked) { 7963 if (ifmgd->auth_data->algorithm == 7964 WLAN_AUTH_SAE) 7965 ifmgd->auth_data->timeout = 7966 jiffies + 7967 IEEE80211_AUTH_TIMEOUT_SAE; 7968 else 7969 ifmgd->auth_data->timeout = 7970 jiffies + 7971 IEEE80211_AUTH_TIMEOUT_SHORT; 7972 run_again(sdata, ifmgd->auth_data->timeout); 7973 } else { 7974 ifmgd->auth_data->timeout = jiffies - 1; 7975 } 7976 ifmgd->auth_data->timeout_started = true; 7977 } else if (ifmgd->assoc_data && 7978 !ifmgd->assoc_data->comeback && 7979 (ieee80211_is_assoc_req(fc) || 7980 ieee80211_is_reassoc_req(fc))) { 7981 /* 7982 * Update association timeout based on the TX status 7983 * for the (Re)Association Request frame. Skip this if 7984 * we have already processed a (Re)Association Response 7985 * frame that indicated need for association comeback 7986 * at a specific time in the future. This could happen 7987 * if the TX status information is delayed enough for 7988 * the response to be received and processed first. 7989 */ 7990 if (status_acked) { 7991 ifmgd->assoc_data->timeout = 7992 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 7993 run_again(sdata, ifmgd->assoc_data->timeout); 7994 } else { 7995 ifmgd->assoc_data->timeout = jiffies - 1; 7996 } 7997 ifmgd->assoc_data->timeout_started = true; 7998 } 7999 } 8000 8001 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8002 time_after(jiffies, ifmgd->auth_data->timeout)) { 8003 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8004 /* 8005 * ok ... we waited for assoc or continuation but 8006 * userspace didn't do it, so kill the auth data 8007 */ 8008 ieee80211_destroy_auth_data(sdata, false); 8009 } else if (ieee80211_auth(sdata)) { 8010 u8 ap_addr[ETH_ALEN]; 8011 struct ieee80211_event event = { 8012 .type = MLME_EVENT, 8013 .u.mlme.data = AUTH_EVENT, 8014 .u.mlme.status = MLME_TIMEOUT, 8015 }; 8016 8017 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8018 8019 ieee80211_destroy_auth_data(sdata, false); 8020 8021 cfg80211_auth_timeout(sdata->dev, ap_addr); 8022 drv_event_callback(sdata->local, sdata, &event); 8023 } 8024 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8025 run_again(sdata, ifmgd->auth_data->timeout); 8026 8027 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8028 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8029 if ((ifmgd->assoc_data->need_beacon && 8030 !sdata->deflink.u.mgd.have_beacon) || 8031 ieee80211_do_assoc(sdata)) { 8032 struct ieee80211_event event = { 8033 .type = MLME_EVENT, 8034 .u.mlme.data = ASSOC_EVENT, 8035 .u.mlme.status = MLME_TIMEOUT, 8036 }; 8037 8038 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8039 drv_event_callback(sdata->local, sdata, &event); 8040 } 8041 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8042 run_again(sdata, ifmgd->assoc_data->timeout); 8043 8044 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8045 ifmgd->associated) { 8046 u8 *bssid = sdata->deflink.u.mgd.bssid; 8047 int max_tries; 8048 8049 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8050 max_tries = max_nullfunc_tries; 8051 else 8052 max_tries = max_probe_tries; 8053 8054 /* ACK received for nullfunc probing frame */ 8055 if (!ifmgd->probe_send_count) 8056 ieee80211_reset_ap_probe(sdata); 8057 else if (ifmgd->nullfunc_failed) { 8058 if (ifmgd->probe_send_count < max_tries) { 8059 mlme_dbg(sdata, 8060 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8061 bssid, ifmgd->probe_send_count, 8062 max_tries); 8063 ieee80211_mgd_probe_ap_send(sdata); 8064 } else { 8065 mlme_dbg(sdata, 8066 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8067 bssid); 8068 ieee80211_sta_connection_lost(sdata, 8069 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8070 false); 8071 } 8072 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8073 run_again(sdata, ifmgd->probe_timeout); 8074 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8075 mlme_dbg(sdata, 8076 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8077 bssid, probe_wait_ms); 8078 ieee80211_sta_connection_lost(sdata, 8079 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8080 } else if (ifmgd->probe_send_count < max_tries) { 8081 mlme_dbg(sdata, 8082 "No probe response from AP %pM after %dms, try %d/%i\n", 8083 bssid, probe_wait_ms, 8084 ifmgd->probe_send_count, max_tries); 8085 ieee80211_mgd_probe_ap_send(sdata); 8086 } else { 8087 /* 8088 * We actually lost the connection ... or did we? 8089 * Let's make sure! 8090 */ 8091 mlme_dbg(sdata, 8092 "No probe response from AP %pM after %dms, disconnecting.\n", 8093 bssid, probe_wait_ms); 8094 8095 ieee80211_sta_connection_lost(sdata, 8096 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8097 } 8098 } 8099 } 8100 8101 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8102 { 8103 struct ieee80211_sub_if_data *sdata = 8104 from_timer(sdata, t, u.mgd.bcn_mon_timer); 8105 8106 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 8107 return; 8108 8109 if (sdata->vif.bss_conf.csa_active && 8110 !sdata->deflink.u.mgd.csa.waiting_bcn) 8111 return; 8112 8113 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8114 return; 8115 8116 sdata->u.mgd.connection_loss = false; 8117 wiphy_work_queue(sdata->local->hw.wiphy, 8118 &sdata->u.mgd.beacon_connection_loss_work); 8119 } 8120 8121 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8122 { 8123 struct ieee80211_sub_if_data *sdata = 8124 from_timer(sdata, t, u.mgd.conn_mon_timer); 8125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8126 struct ieee80211_local *local = sdata->local; 8127 struct sta_info *sta; 8128 unsigned long timeout; 8129 8130 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 8131 return; 8132 8133 if (sdata->vif.bss_conf.csa_active && 8134 !sdata->deflink.u.mgd.csa.waiting_bcn) 8135 return; 8136 8137 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8138 if (!sta) 8139 return; 8140 8141 timeout = sta->deflink.status_stats.last_ack; 8142 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 8143 timeout = sta->deflink.rx_stats.last_rx; 8144 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8145 8146 /* If timeout is after now, then update timer to fire at 8147 * the later date, but do not actually probe at this time. 8148 */ 8149 if (time_is_after_jiffies(timeout)) { 8150 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 8151 return; 8152 } 8153 8154 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8155 } 8156 8157 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8158 struct wiphy_work *work) 8159 { 8160 struct ieee80211_sub_if_data *sdata = 8161 container_of(work, struct ieee80211_sub_if_data, 8162 u.mgd.monitor_work); 8163 8164 ieee80211_mgd_probe_ap(sdata, false); 8165 } 8166 8167 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8168 { 8169 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8170 __ieee80211_stop_poll(sdata); 8171 8172 /* let's probe the connection once */ 8173 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8174 wiphy_work_queue(sdata->local->hw.wiphy, 8175 &sdata->u.mgd.monitor_work); 8176 } 8177 } 8178 8179 #ifdef CONFIG_PM 8180 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8181 { 8182 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8183 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8184 8185 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8186 8187 if (ifmgd->auth_data || ifmgd->assoc_data) { 8188 const u8 *ap_addr = ifmgd->auth_data ? 8189 ifmgd->auth_data->ap_addr : 8190 ifmgd->assoc_data->ap_addr; 8191 8192 /* 8193 * If we are trying to authenticate / associate while suspending, 8194 * cfg80211 won't know and won't actually abort those attempts, 8195 * thus we need to do that ourselves. 8196 */ 8197 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8198 IEEE80211_STYPE_DEAUTH, 8199 WLAN_REASON_DEAUTH_LEAVING, 8200 false, frame_buf); 8201 if (ifmgd->assoc_data) 8202 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8203 if (ifmgd->auth_data) 8204 ieee80211_destroy_auth_data(sdata, false); 8205 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8206 IEEE80211_DEAUTH_FRAME_LEN, 8207 false); 8208 } 8209 8210 /* This is a bit of a hack - we should find a better and more generic 8211 * solution to this. Normally when suspending, cfg80211 will in fact 8212 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8213 * auth (not so important) or assoc (this is the problem) process. 8214 * 8215 * As a consequence, it can happen that we are in the process of both 8216 * associating and suspending, and receive an association response 8217 * after cfg80211 has checked if it needs to disconnect, but before 8218 * we actually set the flag to drop incoming frames. This will then 8219 * cause the workqueue flush to process the association response in 8220 * the suspend, resulting in a successful association just before it 8221 * tries to remove the interface from the driver, which now though 8222 * has a channel context assigned ... this results in issues. 8223 * 8224 * To work around this (for now) simply deauth here again if we're 8225 * now connected. 8226 */ 8227 if (ifmgd->associated && !sdata->local->wowlan) { 8228 u8 bssid[ETH_ALEN]; 8229 struct cfg80211_deauth_request req = { 8230 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8231 .bssid = bssid, 8232 }; 8233 8234 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8235 ieee80211_mgd_deauth(sdata, &req); 8236 } 8237 } 8238 #endif 8239 8240 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8241 { 8242 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8243 8244 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8245 8246 if (!ifmgd->associated) 8247 return; 8248 8249 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8250 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8251 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8252 ieee80211_sta_connection_lost(sdata, 8253 WLAN_REASON_UNSPECIFIED, 8254 true); 8255 return; 8256 } 8257 8258 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8259 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8260 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8261 ieee80211_sta_connection_lost(sdata, 8262 WLAN_REASON_UNSPECIFIED, 8263 true); 8264 return; 8265 } 8266 } 8267 8268 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8269 struct wiphy_work *work) 8270 { 8271 struct ieee80211_link_data *link = 8272 container_of(work, struct ieee80211_link_data, 8273 u.mgd.request_smps_work); 8274 8275 __ieee80211_request_smps_mgd(link->sdata, link, 8276 link->u.mgd.driver_smps_mode); 8277 } 8278 8279 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8280 struct wiphy_work *work) 8281 { 8282 struct ieee80211_sub_if_data *sdata = 8283 container_of(work, struct ieee80211_sub_if_data, 8284 u.mgd.reconf.wk.work); 8285 8286 if (!sdata->u.mgd.reconf.added_links && 8287 !sdata->u.mgd.reconf.removed_links) 8288 return; 8289 8290 sdata_info(sdata, 8291 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 8292 sdata->u.mgd.reconf.added_links, 8293 sdata->u.mgd.reconf.removed_links); 8294 8295 __ieee80211_disconnect(sdata); 8296 } 8297 8298 /* interface setup */ 8299 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8300 { 8301 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8302 8303 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8304 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8305 ieee80211_beacon_connection_loss_work); 8306 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8307 ieee80211_csa_connection_drop_work); 8308 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8309 ieee80211_tdls_peer_del_work); 8310 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8311 ieee80211_ml_reconf_work); 8312 wiphy_delayed_work_init(&ifmgd->reconf.wk, 8313 ieee80211_ml_sta_reconf_timeout); 8314 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8315 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8316 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8317 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8318 ieee80211_sta_handle_tspec_ac_params_wk); 8319 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8320 ieee80211_tid_to_link_map_work); 8321 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8322 ieee80211_neg_ttlm_timeout_work); 8323 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8324 ieee80211_teardown_ttlm_work); 8325 8326 ifmgd->flags = 0; 8327 ifmgd->powersave = sdata->wdev.ps; 8328 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8329 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8330 /* Setup TDLS data */ 8331 spin_lock_init(&ifmgd->teardown_lock); 8332 ifmgd->teardown_skb = NULL; 8333 ifmgd->orig_teardown_skb = NULL; 8334 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8335 } 8336 8337 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8338 struct wiphy_work *work) 8339 { 8340 struct ieee80211_link_data *link = 8341 container_of(work, struct ieee80211_link_data, 8342 u.mgd.recalc_smps); 8343 8344 ieee80211_recalc_smps(link->sdata, link); 8345 } 8346 8347 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8348 { 8349 struct ieee80211_sub_if_data *sdata = link->sdata; 8350 struct ieee80211_local *local = sdata->local; 8351 unsigned int link_id = link->link_id; 8352 8353 link->u.mgd.p2p_noa_index = -1; 8354 link->conf->bssid = link->u.mgd.bssid; 8355 link->smps_mode = IEEE80211_SMPS_OFF; 8356 8357 wiphy_work_init(&link->u.mgd.request_smps_work, 8358 ieee80211_request_smps_mgd_work); 8359 wiphy_work_init(&link->u.mgd.recalc_smps, 8360 ieee80211_recalc_smps_work); 8361 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8362 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8363 else 8364 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8365 8366 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8367 ieee80211_csa_switch_work); 8368 8369 ieee80211_clear_tpe(&link->conf->tpe); 8370 8371 if (sdata->u.mgd.assoc_data) 8372 ether_addr_copy(link->conf->addr, 8373 sdata->u.mgd.assoc_data->link[link_id].addr); 8374 else if (sdata->u.mgd.reconf.add_links_data) 8375 ether_addr_copy(link->conf->addr, 8376 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 8377 else if (!is_valid_ether_addr(link->conf->addr)) 8378 eth_random_addr(link->conf->addr); 8379 } 8380 8381 /* scan finished notification */ 8382 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8383 { 8384 struct ieee80211_sub_if_data *sdata; 8385 8386 /* Restart STA timers */ 8387 rcu_read_lock(); 8388 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8389 if (ieee80211_sdata_running(sdata)) 8390 ieee80211_restart_sta_timer(sdata); 8391 } 8392 rcu_read_unlock(); 8393 } 8394 8395 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8396 struct cfg80211_bss *cbss, s8 link_id, 8397 const u8 *ap_mld_addr, bool assoc, 8398 struct ieee80211_conn_settings *conn, 8399 bool override, 8400 unsigned long *userspace_selectors) 8401 { 8402 struct ieee80211_local *local = sdata->local; 8403 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8404 struct ieee80211_bss *bss = (void *)cbss->priv; 8405 struct sta_info *new_sta = NULL; 8406 struct ieee80211_link_data *link; 8407 bool have_sta = false; 8408 bool mlo; 8409 int err; 8410 8411 if (link_id >= 0) { 8412 mlo = true; 8413 if (WARN_ON(!ap_mld_addr)) 8414 return -EINVAL; 8415 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 8416 } else { 8417 if (WARN_ON(ap_mld_addr)) 8418 return -EINVAL; 8419 ap_mld_addr = cbss->bssid; 8420 err = ieee80211_vif_set_links(sdata, 0, 0); 8421 link_id = 0; 8422 mlo = false; 8423 } 8424 8425 if (err) 8426 return err; 8427 8428 link = sdata_dereference(sdata->link[link_id], sdata); 8429 if (WARN_ON(!link)) { 8430 err = -ENOLINK; 8431 goto out_err; 8432 } 8433 8434 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8435 err = -EINVAL; 8436 goto out_err; 8437 } 8438 8439 /* If a reconfig is happening, bail out */ 8440 if (local->in_reconfig) { 8441 err = -EBUSY; 8442 goto out_err; 8443 } 8444 8445 if (assoc) { 8446 rcu_read_lock(); 8447 have_sta = sta_info_get(sdata, ap_mld_addr); 8448 rcu_read_unlock(); 8449 } 8450 8451 if (!have_sta) { 8452 if (mlo) 8453 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8454 link_id, cbss->bssid, 8455 GFP_KERNEL); 8456 else 8457 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8458 8459 if (!new_sta) { 8460 err = -ENOMEM; 8461 goto out_err; 8462 } 8463 8464 new_sta->sta.mlo = mlo; 8465 } 8466 8467 /* 8468 * Set up the information for the new channel before setting the 8469 * new channel. We can't - completely race-free - change the basic 8470 * rates bitmap and the channel (sband) that it refers to, but if 8471 * we set it up before we at least avoid calling into the driver's 8472 * bss_info_changed() method with invalid information (since we do 8473 * call that from changing the channel - only for IDLE and perhaps 8474 * some others, but ...). 8475 * 8476 * So to avoid that, just set up all the new information before the 8477 * channel, but tell the driver to apply it only afterwards, since 8478 * it might need the new channel for that. 8479 */ 8480 if (new_sta) { 8481 const struct cfg80211_bss_ies *ies; 8482 struct link_sta_info *link_sta; 8483 8484 rcu_read_lock(); 8485 link_sta = rcu_dereference(new_sta->link[link_id]); 8486 if (WARN_ON(!link_sta)) { 8487 rcu_read_unlock(); 8488 sta_info_free(local, new_sta); 8489 err = -EINVAL; 8490 goto out_err; 8491 } 8492 8493 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8494 link_sta, cbss); 8495 if (err) { 8496 rcu_read_unlock(); 8497 sta_info_free(local, new_sta); 8498 goto out_err; 8499 } 8500 8501 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8502 8503 /* set timing information */ 8504 link->conf->beacon_int = cbss->beacon_interval; 8505 ies = rcu_dereference(cbss->beacon_ies); 8506 if (ies) { 8507 link->conf->sync_tsf = ies->tsf; 8508 link->conf->sync_device_ts = 8509 bss->device_ts_beacon; 8510 8511 ieee80211_get_dtim(ies, 8512 &link->conf->sync_dtim_count, 8513 NULL); 8514 } else if (!ieee80211_hw_check(&sdata->local->hw, 8515 TIMING_BEACON_ONLY)) { 8516 ies = rcu_dereference(cbss->proberesp_ies); 8517 /* must be non-NULL since beacon IEs were NULL */ 8518 link->conf->sync_tsf = ies->tsf; 8519 link->conf->sync_device_ts = 8520 bss->device_ts_presp; 8521 link->conf->sync_dtim_count = 0; 8522 } else { 8523 link->conf->sync_tsf = 0; 8524 link->conf->sync_device_ts = 0; 8525 link->conf->sync_dtim_count = 0; 8526 } 8527 rcu_read_unlock(); 8528 } 8529 8530 if (new_sta || override) { 8531 /* 8532 * Only set this if we're also going to calculate the AP 8533 * settings etc., otherwise this was set before in a 8534 * previous call. Note override is set to %true in assoc 8535 * if the settings were changed. 8536 */ 8537 link->u.mgd.conn = *conn; 8538 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 8539 mlo, &link->u.mgd.conn, 8540 userspace_selectors); 8541 if (err) { 8542 if (new_sta) 8543 sta_info_free(local, new_sta); 8544 goto out_err; 8545 } 8546 /* pass out for use in assoc */ 8547 *conn = link->u.mgd.conn; 8548 } 8549 8550 if (new_sta) { 8551 /* 8552 * tell driver about BSSID, basic rates and timing 8553 * this was set up above, before setting the channel 8554 */ 8555 ieee80211_link_info_change_notify(sdata, link, 8556 BSS_CHANGED_BSSID | 8557 BSS_CHANGED_BASIC_RATES | 8558 BSS_CHANGED_BEACON_INT); 8559 8560 if (assoc) 8561 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 8562 8563 err = sta_info_insert(new_sta); 8564 new_sta = NULL; 8565 if (err) { 8566 sdata_info(sdata, 8567 "failed to insert STA entry for the AP (error %d)\n", 8568 err); 8569 goto out_release_chan; 8570 } 8571 } else 8572 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 8573 8574 /* Cancel scan to ensure that nothing interferes with connection */ 8575 if (local->scanning) 8576 ieee80211_scan_cancel(local); 8577 8578 return 0; 8579 8580 out_release_chan: 8581 ieee80211_link_release_channel(link); 8582 out_err: 8583 ieee80211_vif_set_links(sdata, 0, 0); 8584 return err; 8585 } 8586 8587 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 8588 const struct cfg80211_bss_ies *ies, 8589 u8 cur_channel, bool ignore_ecsa) 8590 { 8591 const struct element *csa_elem, *ecsa_elem; 8592 struct ieee80211_channel_sw_ie *csa = NULL; 8593 struct ieee80211_ext_chansw_ie *ecsa = NULL; 8594 8595 if (!ies) 8596 return false; 8597 8598 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 8599 ies->data, ies->len); 8600 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 8601 csa = (void *)csa_elem->data; 8602 8603 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 8604 ies->data, ies->len); 8605 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 8606 ecsa = (void *)ecsa_elem->data; 8607 8608 if (csa && csa->count == 0) 8609 csa = NULL; 8610 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 8611 csa = NULL; 8612 8613 if (ecsa && ecsa->count == 0) 8614 ecsa = NULL; 8615 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 8616 ecsa = NULL; 8617 8618 if (ignore_ecsa && ecsa) { 8619 sdata_info(sdata, 8620 "Ignoring ECSA in probe response - was considered stuck!\n"); 8621 return csa; 8622 } 8623 8624 return csa || ecsa; 8625 } 8626 8627 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 8628 struct cfg80211_bss *bss) 8629 { 8630 u8 cur_channel; 8631 bool ret; 8632 8633 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 8634 8635 rcu_read_lock(); 8636 if (ieee80211_mgd_csa_present(sdata, 8637 rcu_dereference(bss->beacon_ies), 8638 cur_channel, false)) { 8639 ret = true; 8640 goto out; 8641 } 8642 8643 if (ieee80211_mgd_csa_present(sdata, 8644 rcu_dereference(bss->proberesp_ies), 8645 cur_channel, bss->proberesp_ecsa_stuck)) { 8646 ret = true; 8647 goto out; 8648 } 8649 8650 ret = false; 8651 out: 8652 rcu_read_unlock(); 8653 return ret; 8654 } 8655 8656 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 8657 const u8 *supported_selectors, 8658 u8 supported_selectors_len) 8659 { 8660 if (supported_selectors) { 8661 for (int i = 0; i < supported_selectors_len; i++) { 8662 set_bit(supported_selectors[i], 8663 userspace_selectors); 8664 } 8665 } else { 8666 /* Assume SAE_H2E support for backward compatibility. */ 8667 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 8668 userspace_selectors); 8669 } 8670 } 8671 8672 /* config hooks */ 8673 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 8674 struct cfg80211_auth_request *req) 8675 { 8676 struct ieee80211_local *local = sdata->local; 8677 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8678 struct ieee80211_mgd_auth_data *auth_data; 8679 struct ieee80211_conn_settings conn; 8680 struct ieee80211_link_data *link; 8681 struct ieee80211_supported_band *sband; 8682 struct ieee80211_bss *bss; 8683 u16 auth_alg; 8684 int err; 8685 bool cont_auth, wmm_used; 8686 8687 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8688 8689 /* prepare auth data structure */ 8690 8691 switch (req->auth_type) { 8692 case NL80211_AUTHTYPE_OPEN_SYSTEM: 8693 auth_alg = WLAN_AUTH_OPEN; 8694 break; 8695 case NL80211_AUTHTYPE_SHARED_KEY: 8696 if (fips_enabled) 8697 return -EOPNOTSUPP; 8698 auth_alg = WLAN_AUTH_SHARED_KEY; 8699 break; 8700 case NL80211_AUTHTYPE_FT: 8701 auth_alg = WLAN_AUTH_FT; 8702 break; 8703 case NL80211_AUTHTYPE_NETWORK_EAP: 8704 auth_alg = WLAN_AUTH_LEAP; 8705 break; 8706 case NL80211_AUTHTYPE_SAE: 8707 auth_alg = WLAN_AUTH_SAE; 8708 break; 8709 case NL80211_AUTHTYPE_FILS_SK: 8710 auth_alg = WLAN_AUTH_FILS_SK; 8711 break; 8712 case NL80211_AUTHTYPE_FILS_SK_PFS: 8713 auth_alg = WLAN_AUTH_FILS_SK_PFS; 8714 break; 8715 case NL80211_AUTHTYPE_FILS_PK: 8716 auth_alg = WLAN_AUTH_FILS_PK; 8717 break; 8718 default: 8719 return -EOPNOTSUPP; 8720 } 8721 8722 if (ifmgd->assoc_data) 8723 return -EBUSY; 8724 8725 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 8726 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 8727 return -EINVAL; 8728 } 8729 8730 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 8731 req->ie_len, GFP_KERNEL); 8732 if (!auth_data) 8733 return -ENOMEM; 8734 8735 memcpy(auth_data->ap_addr, 8736 req->ap_mld_addr ?: req->bss->bssid, 8737 ETH_ALEN); 8738 auth_data->bss = req->bss; 8739 auth_data->link_id = req->link_id; 8740 8741 if (req->auth_data_len >= 4) { 8742 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 8743 __le16 *pos = (__le16 *) req->auth_data; 8744 8745 auth_data->sae_trans = le16_to_cpu(pos[0]); 8746 auth_data->sae_status = le16_to_cpu(pos[1]); 8747 } 8748 memcpy(auth_data->data, req->auth_data + 4, 8749 req->auth_data_len - 4); 8750 auth_data->data_len += req->auth_data_len - 4; 8751 } 8752 8753 /* Check if continuing authentication or trying to authenticate with the 8754 * same BSS that we were in the process of authenticating with and avoid 8755 * removal and re-addition of the STA entry in 8756 * ieee80211_prep_connection(). 8757 */ 8758 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 8759 ifmgd->auth_data->link_id == req->link_id; 8760 8761 if (req->ie && req->ie_len) { 8762 memcpy(&auth_data->data[auth_data->data_len], 8763 req->ie, req->ie_len); 8764 auth_data->data_len += req->ie_len; 8765 } 8766 8767 if (req->key && req->key_len) { 8768 auth_data->key_len = req->key_len; 8769 auth_data->key_idx = req->key_idx; 8770 memcpy(auth_data->key, req->key, req->key_len); 8771 } 8772 8773 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 8774 req->supported_selectors, 8775 req->supported_selectors_len); 8776 8777 auth_data->algorithm = auth_alg; 8778 8779 /* try to authenticate/probe */ 8780 8781 if (ifmgd->auth_data) { 8782 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 8783 auth_data->peer_confirmed = 8784 ifmgd->auth_data->peer_confirmed; 8785 } 8786 ieee80211_destroy_auth_data(sdata, cont_auth); 8787 } 8788 8789 /* prep auth_data so we don't go into idle on disassoc */ 8790 ifmgd->auth_data = auth_data; 8791 8792 /* If this is continuation of an ongoing SAE authentication exchange 8793 * (i.e., request to send SAE Confirm) and the peer has already 8794 * confirmed, mark authentication completed since we are about to send 8795 * out SAE Confirm. 8796 */ 8797 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 8798 auth_data->peer_confirmed && auth_data->sae_trans == 2) 8799 ieee80211_mark_sta_auth(sdata); 8800 8801 if (ifmgd->associated) { 8802 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8803 8804 sdata_info(sdata, 8805 "disconnect from AP %pM for new auth to %pM\n", 8806 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 8807 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8808 WLAN_REASON_UNSPECIFIED, 8809 false, frame_buf); 8810 8811 ieee80211_report_disconnect(sdata, frame_buf, 8812 sizeof(frame_buf), true, 8813 WLAN_REASON_UNSPECIFIED, 8814 false); 8815 } 8816 8817 /* needed for transmitting the auth frame(s) properly */ 8818 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 8819 8820 bss = (void *)req->bss->priv; 8821 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 8822 8823 sband = local->hw.wiphy->bands[req->bss->channel->band]; 8824 8825 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 8826 &conn); 8827 8828 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 8829 req->ap_mld_addr, cont_auth, 8830 &conn, false, 8831 auth_data->userspace_selectors); 8832 if (err) 8833 goto err_clear; 8834 8835 if (req->link_id >= 0) 8836 link = sdata_dereference(sdata->link[req->link_id], sdata); 8837 else 8838 link = &sdata->deflink; 8839 8840 if (WARN_ON(!link)) { 8841 err = -ENOLINK; 8842 goto err_clear; 8843 } 8844 8845 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 8846 auth_data->ap_addr, link->conf->addr); 8847 8848 err = ieee80211_auth(sdata); 8849 if (err) { 8850 sta_info_destroy_addr(sdata, auth_data->ap_addr); 8851 goto err_clear; 8852 } 8853 8854 /* hold our own reference */ 8855 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 8856 return 0; 8857 8858 err_clear: 8859 if (!ieee80211_vif_is_mld(&sdata->vif)) { 8860 eth_zero_addr(sdata->deflink.u.mgd.bssid); 8861 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 8862 BSS_CHANGED_BSSID); 8863 ieee80211_link_release_channel(&sdata->deflink); 8864 } 8865 ifmgd->auth_data = NULL; 8866 kfree(auth_data); 8867 return err; 8868 } 8869 8870 static void 8871 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 8872 struct ieee80211_mgd_assoc_data *assoc_data, 8873 struct cfg80211_assoc_request *req, 8874 struct ieee80211_conn_settings *conn, 8875 unsigned int link_id) 8876 { 8877 struct ieee80211_local *local = sdata->local; 8878 const struct cfg80211_bss_ies *bss_ies; 8879 struct ieee80211_supported_band *sband; 8880 struct ieee80211_link_data *link; 8881 struct cfg80211_bss *cbss; 8882 struct ieee80211_bss *bss; 8883 8884 cbss = assoc_data->link[link_id].bss; 8885 if (WARN_ON(!cbss)) 8886 return; 8887 8888 bss = (void *)cbss->priv; 8889 8890 sband = local->hw.wiphy->bands[cbss->channel->band]; 8891 if (WARN_ON(!sband)) 8892 return; 8893 8894 link = sdata_dereference(sdata->link[link_id], sdata); 8895 if (WARN_ON(!link)) 8896 return; 8897 8898 /* for MLO connections assume advertising all rates is OK */ 8899 if (!req->ap_mld_addr) { 8900 assoc_data->supp_rates = bss->supp_rates; 8901 assoc_data->supp_rates_len = bss->supp_rates_len; 8902 } 8903 8904 /* copy and link elems for the STA profile */ 8905 if (req->links[link_id].elems_len) { 8906 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 8907 req->links[link_id].elems_len); 8908 assoc_data->link[link_id].elems = assoc_data->ie_pos; 8909 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 8910 assoc_data->ie_pos += req->links[link_id].elems_len; 8911 } 8912 8913 link->u.mgd.beacon_crc_valid = false; 8914 link->u.mgd.dtim_period = 0; 8915 link->u.mgd.have_beacon = false; 8916 8917 /* override HT configuration only if the AP and we support it */ 8918 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 8919 struct ieee80211_sta_ht_cap sta_ht_cap; 8920 8921 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 8922 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 8923 } 8924 8925 rcu_read_lock(); 8926 bss_ies = rcu_dereference(cbss->beacon_ies); 8927 if (bss_ies) { 8928 u8 dtim_count = 0; 8929 8930 ieee80211_get_dtim(bss_ies, &dtim_count, 8931 &link->u.mgd.dtim_period); 8932 8933 sdata->deflink.u.mgd.have_beacon = true; 8934 8935 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 8936 link->conf->sync_tsf = bss_ies->tsf; 8937 link->conf->sync_device_ts = bss->device_ts_beacon; 8938 link->conf->sync_dtim_count = dtim_count; 8939 } 8940 } else { 8941 bss_ies = rcu_dereference(cbss->ies); 8942 } 8943 8944 if (bss_ies) { 8945 const struct element *elem; 8946 8947 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 8948 bss_ies->data, bss_ies->len); 8949 if (elem && elem->datalen >= 3) 8950 link->conf->profile_periodicity = elem->data[2]; 8951 else 8952 link->conf->profile_periodicity = 0; 8953 8954 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 8955 bss_ies->data, bss_ies->len); 8956 if (elem && elem->datalen >= 11 && 8957 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 8958 link->conf->ema_ap = true; 8959 else 8960 link->conf->ema_ap = false; 8961 } 8962 rcu_read_unlock(); 8963 8964 if (bss->corrupt_data) { 8965 char *corrupt_type = "data"; 8966 8967 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 8968 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 8969 corrupt_type = "beacon and probe response"; 8970 else 8971 corrupt_type = "beacon"; 8972 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 8973 corrupt_type = "probe response"; 8974 } 8975 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 8976 cbss->bssid, corrupt_type); 8977 } 8978 8979 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 8980 if (sdata->u.mgd.powersave) 8981 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 8982 else 8983 link->smps_mode = IEEE80211_SMPS_OFF; 8984 } else { 8985 link->smps_mode = link->u.mgd.req_smps; 8986 } 8987 } 8988 8989 static int 8990 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 8991 struct ieee80211_mgd_assoc_data *assoc_data, 8992 int link_id) 8993 { 8994 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 8995 enum nl80211_band band = cbss->channel->band; 8996 struct ieee80211_supported_band *sband; 8997 const struct element *elem; 8998 int err; 8999 9000 /* neither HT nor VHT elements used on 6 GHz */ 9001 if (band == NL80211_BAND_6GHZ) 9002 return 0; 9003 9004 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9005 return 0; 9006 9007 rcu_read_lock(); 9008 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9009 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9010 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9011 cbss->bssid); 9012 err = -EINVAL; 9013 goto out_rcu; 9014 } 9015 assoc_data->link[link_id].ap_ht_param = 9016 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9017 rcu_read_unlock(); 9018 9019 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9020 return 0; 9021 9022 /* some drivers want to support VHT on 2.4 GHz even */ 9023 sband = sdata->local->hw.wiphy->bands[band]; 9024 if (!sband->vht_cap.vht_supported) 9025 return 0; 9026 9027 rcu_read_lock(); 9028 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9029 /* but even then accept it not being present on the AP */ 9030 if (!elem && band == NL80211_BAND_2GHZ) { 9031 err = 0; 9032 goto out_rcu; 9033 } 9034 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9035 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9036 cbss->bssid); 9037 err = -EINVAL; 9038 goto out_rcu; 9039 } 9040 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9041 sizeof(struct ieee80211_vht_cap)); 9042 rcu_read_unlock(); 9043 9044 return 0; 9045 out_rcu: 9046 rcu_read_unlock(); 9047 return err; 9048 } 9049 9050 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9051 struct cfg80211_assoc_request *req) 9052 { 9053 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9054 struct ieee80211_local *local = sdata->local; 9055 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9056 struct ieee80211_mgd_assoc_data *assoc_data; 9057 const struct element *ssid_elem; 9058 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9059 struct ieee80211_link_data *link; 9060 struct cfg80211_bss *cbss; 9061 bool override, uapsd_supported; 9062 bool match_auth; 9063 int i, err; 9064 size_t size = sizeof(*assoc_data) + req->ie_len; 9065 9066 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9067 size += req->links[i].elems_len; 9068 9069 /* FIXME: no support for 4-addr MLO yet */ 9070 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9071 return -EOPNOTSUPP; 9072 9073 assoc_data = kzalloc(size, GFP_KERNEL); 9074 if (!assoc_data) 9075 return -ENOMEM; 9076 9077 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9078 9079 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9080 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9081 err = -EINVAL; 9082 goto err_free; 9083 } 9084 9085 rcu_read_lock(); 9086 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9087 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9088 rcu_read_unlock(); 9089 err = -EINVAL; 9090 goto err_free; 9091 } 9092 9093 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9094 assoc_data->ssid_len = ssid_elem->datalen; 9095 rcu_read_unlock(); 9096 9097 if (req->ap_mld_addr) 9098 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9099 else 9100 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9101 9102 if (ifmgd->associated) { 9103 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9104 9105 sdata_info(sdata, 9106 "disconnect from AP %pM for new assoc to %pM\n", 9107 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9108 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9109 WLAN_REASON_UNSPECIFIED, 9110 false, frame_buf); 9111 9112 ieee80211_report_disconnect(sdata, frame_buf, 9113 sizeof(frame_buf), true, 9114 WLAN_REASON_UNSPECIFIED, 9115 false); 9116 } 9117 9118 ieee80211_parse_cfg_selectors(assoc_data->userspace_selectors, 9119 req->supported_selectors, 9120 req->supported_selectors_len); 9121 9122 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9123 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9124 sizeof(ifmgd->ht_capa_mask)); 9125 9126 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9127 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9128 sizeof(ifmgd->vht_capa_mask)); 9129 9130 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9131 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9132 sizeof(ifmgd->s1g_capa_mask)); 9133 9134 /* keep some setup (AP STA, channel, ...) if matching */ 9135 match_auth = ifmgd->auth_data && 9136 ether_addr_equal(ifmgd->auth_data->ap_addr, 9137 assoc_data->ap_addr) && 9138 ifmgd->auth_data->link_id == req->link_id; 9139 9140 if (req->ap_mld_addr) { 9141 uapsd_supported = true; 9142 9143 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9144 ASSOC_REQ_DISABLE_VHT | 9145 ASSOC_REQ_DISABLE_HE | 9146 ASSOC_REQ_DISABLE_EHT)) { 9147 err = -EINVAL; 9148 goto err_free; 9149 } 9150 9151 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9152 struct ieee80211_supported_band *sband; 9153 struct cfg80211_bss *link_cbss = req->links[i].bss; 9154 struct ieee80211_bss *bss; 9155 9156 if (!link_cbss) 9157 continue; 9158 9159 bss = (void *)link_cbss->priv; 9160 9161 if (!bss->wmm_used) { 9162 err = -EINVAL; 9163 req->links[i].error = err; 9164 goto err_free; 9165 } 9166 9167 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9168 err = -EINVAL; 9169 req->links[i].error = err; 9170 goto err_free; 9171 } 9172 9173 link = sdata_dereference(sdata->link[i], sdata); 9174 if (link) 9175 ether_addr_copy(assoc_data->link[i].addr, 9176 link->conf->addr); 9177 else 9178 eth_random_addr(assoc_data->link[i].addr); 9179 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9180 9181 if (match_auth && i == assoc_link_id && link) 9182 assoc_data->link[i].conn = link->u.mgd.conn; 9183 else 9184 assoc_data->link[i].conn = 9185 ieee80211_conn_settings_unlimited; 9186 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9187 req, true, i, 9188 &assoc_data->link[i].conn); 9189 assoc_data->link[i].bss = link_cbss; 9190 assoc_data->link[i].disabled = req->links[i].disabled; 9191 9192 if (!bss->uapsd_supported) 9193 uapsd_supported = false; 9194 9195 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9196 err = -EINVAL; 9197 req->links[i].error = err; 9198 goto err_free; 9199 } 9200 9201 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9202 assoc_data, i); 9203 if (err) { 9204 err = -EINVAL; 9205 req->links[i].error = err; 9206 goto err_free; 9207 } 9208 } 9209 9210 assoc_data->wmm = true; 9211 } else { 9212 struct ieee80211_supported_band *sband; 9213 struct ieee80211_bss *bss = (void *)cbss->priv; 9214 9215 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9216 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9217 9218 assoc_data->wmm = bss->wmm_used && 9219 (local->hw.queues >= IEEE80211_NUM_ACS); 9220 9221 if (cbss->channel->band == NL80211_BAND_6GHZ && 9222 req->flags & (ASSOC_REQ_DISABLE_HT | 9223 ASSOC_REQ_DISABLE_VHT | 9224 ASSOC_REQ_DISABLE_HE)) { 9225 err = -EINVAL; 9226 goto err_free; 9227 } 9228 9229 sband = local->hw.wiphy->bands[cbss->channel->band]; 9230 9231 assoc_data->link[0].bss = cbss; 9232 9233 if (match_auth) 9234 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9235 else 9236 assoc_data->link[0].conn = 9237 ieee80211_conn_settings_unlimited; 9238 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9239 assoc_data->wmm, 0, 9240 &assoc_data->link[0].conn); 9241 9242 uapsd_supported = bss->uapsd_supported; 9243 9244 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9245 if (err) 9246 goto err_free; 9247 } 9248 9249 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9250 9251 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9252 err = -EBUSY; 9253 goto err_free; 9254 } 9255 9256 if (ifmgd->assoc_data) { 9257 err = -EBUSY; 9258 goto err_free; 9259 } 9260 9261 /* Cleanup is delayed if auth_data matches */ 9262 if (ifmgd->auth_data && !match_auth) 9263 ieee80211_destroy_auth_data(sdata, false); 9264 9265 if (req->ie && req->ie_len) { 9266 memcpy(assoc_data->ie, req->ie, req->ie_len); 9267 assoc_data->ie_len = req->ie_len; 9268 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9269 } else { 9270 assoc_data->ie_pos = assoc_data->ie; 9271 } 9272 9273 if (req->fils_kek) { 9274 /* should already be checked in cfg80211 - so warn */ 9275 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9276 err = -EINVAL; 9277 goto err_free; 9278 } 9279 memcpy(assoc_data->fils_kek, req->fils_kek, 9280 req->fils_kek_len); 9281 assoc_data->fils_kek_len = req->fils_kek_len; 9282 } 9283 9284 if (req->fils_nonces) 9285 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9286 2 * FILS_NONCE_LEN); 9287 9288 /* default timeout */ 9289 assoc_data->timeout = jiffies; 9290 assoc_data->timeout_started = true; 9291 9292 assoc_data->assoc_link_id = assoc_link_id; 9293 9294 if (req->ap_mld_addr) { 9295 /* if there was no authentication, set up the link */ 9296 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9297 if (err) 9298 goto err_clear; 9299 } 9300 9301 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9302 if (WARN_ON(!link)) { 9303 err = -EINVAL; 9304 goto err_clear; 9305 } 9306 9307 override = link->u.mgd.conn.mode != 9308 assoc_data->link[assoc_link_id].conn.mode || 9309 link->u.mgd.conn.bw_limit != 9310 assoc_data->link[assoc_link_id].conn.bw_limit; 9311 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9312 9313 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9314 assoc_link_id); 9315 9316 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9317 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9318 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9319 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9320 9321 if (assoc_data->wmm && uapsd_supported && 9322 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9323 assoc_data->uapsd = true; 9324 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9325 } else { 9326 assoc_data->uapsd = false; 9327 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9328 } 9329 9330 if (req->prev_bssid) 9331 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9332 9333 if (req->use_mfp) { 9334 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9335 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9336 } else { 9337 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9338 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9339 } 9340 9341 if (req->flags & ASSOC_REQ_USE_RRM) 9342 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9343 else 9344 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9345 9346 if (req->crypto.control_port) 9347 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9348 else 9349 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9350 9351 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9352 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9353 sdata->control_port_over_nl80211 = 9354 req->crypto.control_port_over_nl80211; 9355 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9356 9357 /* kick off associate process */ 9358 ifmgd->assoc_data = assoc_data; 9359 9360 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9361 if (!assoc_data->link[i].bss) 9362 continue; 9363 if (i == assoc_data->assoc_link_id) 9364 continue; 9365 /* only calculate the mode, hence link == NULL */ 9366 err = ieee80211_prep_channel(sdata, NULL, i, 9367 assoc_data->link[i].bss, true, 9368 &assoc_data->link[i].conn, 9369 assoc_data->userspace_selectors); 9370 if (err) { 9371 req->links[i].error = err; 9372 goto err_clear; 9373 } 9374 } 9375 9376 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9377 vif_cfg->ssid_len = assoc_data->ssid_len; 9378 9379 /* needed for transmitting the assoc frames properly */ 9380 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9381 9382 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9383 req->ap_mld_addr, true, 9384 &assoc_data->link[assoc_link_id].conn, 9385 override, 9386 assoc_data->userspace_selectors); 9387 if (err) 9388 goto err_clear; 9389 9390 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9391 const struct cfg80211_bss_ies *beacon_ies; 9392 9393 rcu_read_lock(); 9394 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9395 if (!beacon_ies) { 9396 /* 9397 * Wait up to one beacon interval ... 9398 * should this be more if we miss one? 9399 */ 9400 sdata_info(sdata, "waiting for beacon from %pM\n", 9401 link->u.mgd.bssid); 9402 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9403 assoc_data->timeout_started = true; 9404 assoc_data->need_beacon = true; 9405 } 9406 rcu_read_unlock(); 9407 } 9408 9409 run_again(sdata, assoc_data->timeout); 9410 9411 /* We are associating, clean up auth_data */ 9412 if (ifmgd->auth_data) 9413 ieee80211_destroy_auth_data(sdata, true); 9414 9415 return 0; 9416 err_clear: 9417 if (!ifmgd->auth_data) { 9418 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9419 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9420 BSS_CHANGED_BSSID); 9421 } 9422 ifmgd->assoc_data = NULL; 9423 err_free: 9424 kfree(assoc_data); 9425 return err; 9426 } 9427 9428 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9429 struct cfg80211_deauth_request *req) 9430 { 9431 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9432 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9433 bool tx = !req->local_state_change; 9434 struct ieee80211_prep_tx_info info = { 9435 .subtype = IEEE80211_STYPE_DEAUTH, 9436 }; 9437 9438 if (ifmgd->auth_data && 9439 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9440 sdata_info(sdata, 9441 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9442 req->bssid, req->reason_code, 9443 ieee80211_get_reason_code_string(req->reason_code)); 9444 9445 info.link_id = ifmgd->auth_data->link_id; 9446 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9447 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9448 IEEE80211_STYPE_DEAUTH, 9449 req->reason_code, tx, 9450 frame_buf); 9451 ieee80211_destroy_auth_data(sdata, false); 9452 ieee80211_report_disconnect(sdata, frame_buf, 9453 sizeof(frame_buf), true, 9454 req->reason_code, false); 9455 drv_mgd_complete_tx(sdata->local, sdata, &info); 9456 return 0; 9457 } 9458 9459 if (ifmgd->assoc_data && 9460 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 9461 sdata_info(sdata, 9462 "aborting association with %pM by local choice (Reason: %u=%s)\n", 9463 req->bssid, req->reason_code, 9464 ieee80211_get_reason_code_string(req->reason_code)); 9465 9466 info.link_id = ifmgd->assoc_data->assoc_link_id; 9467 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9468 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9469 IEEE80211_STYPE_DEAUTH, 9470 req->reason_code, tx, 9471 frame_buf); 9472 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9473 ieee80211_report_disconnect(sdata, frame_buf, 9474 sizeof(frame_buf), true, 9475 req->reason_code, false); 9476 drv_mgd_complete_tx(sdata->local, sdata, &info); 9477 return 0; 9478 } 9479 9480 if (ifmgd->associated && 9481 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 9482 sdata_info(sdata, 9483 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 9484 req->bssid, req->reason_code, 9485 ieee80211_get_reason_code_string(req->reason_code)); 9486 9487 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9488 req->reason_code, tx, frame_buf); 9489 ieee80211_report_disconnect(sdata, frame_buf, 9490 sizeof(frame_buf), true, 9491 req->reason_code, false); 9492 drv_mgd_complete_tx(sdata->local, sdata, &info); 9493 return 0; 9494 } 9495 9496 return -ENOTCONN; 9497 } 9498 9499 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 9500 struct cfg80211_disassoc_request *req) 9501 { 9502 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9503 9504 if (!sdata->u.mgd.associated || 9505 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 9506 return -ENOTCONN; 9507 9508 sdata_info(sdata, 9509 "disassociating from %pM by local choice (Reason: %u=%s)\n", 9510 req->ap_addr, req->reason_code, 9511 ieee80211_get_reason_code_string(req->reason_code)); 9512 9513 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 9514 req->reason_code, !req->local_state_change, 9515 frame_buf); 9516 9517 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 9518 req->reason_code, false); 9519 9520 return 0; 9521 } 9522 9523 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 9524 { 9525 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9526 &link->u.mgd.request_smps_work); 9527 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9528 &link->u.mgd.recalc_smps); 9529 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 9530 &link->u.mgd.csa.switch_work); 9531 } 9532 9533 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 9534 { 9535 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9536 9537 /* 9538 * Make sure some work items will not run after this, 9539 * they will not do anything but might not have been 9540 * cancelled when disconnecting. 9541 */ 9542 wiphy_work_cancel(sdata->local->hw.wiphy, 9543 &ifmgd->monitor_work); 9544 wiphy_work_cancel(sdata->local->hw.wiphy, 9545 &ifmgd->beacon_connection_loss_work); 9546 wiphy_work_cancel(sdata->local->hw.wiphy, 9547 &ifmgd->csa_connection_drop_work); 9548 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 9549 &ifmgd->tdls_peer_del_work); 9550 9551 if (ifmgd->assoc_data) 9552 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 9553 if (ifmgd->auth_data) 9554 ieee80211_destroy_auth_data(sdata, false); 9555 spin_lock_bh(&ifmgd->teardown_lock); 9556 if (ifmgd->teardown_skb) { 9557 kfree_skb(ifmgd->teardown_skb); 9558 ifmgd->teardown_skb = NULL; 9559 ifmgd->orig_teardown_skb = NULL; 9560 } 9561 kfree(ifmgd->assoc_req_ies); 9562 ifmgd->assoc_req_ies = NULL; 9563 ifmgd->assoc_req_ies_len = 0; 9564 spin_unlock_bh(&ifmgd->teardown_lock); 9565 del_timer_sync(&ifmgd->timer); 9566 } 9567 9568 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 9569 enum nl80211_cqm_rssi_threshold_event rssi_event, 9570 s32 rssi_level, 9571 gfp_t gfp) 9572 { 9573 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9574 9575 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 9576 9577 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 9578 } 9579 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 9580 9581 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 9582 { 9583 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9584 9585 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 9586 9587 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 9588 } 9589 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 9590 9591 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 9592 int rssi_min_thold, 9593 int rssi_max_thold) 9594 { 9595 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 9596 9597 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 9598 return; 9599 9600 /* 9601 * Scale up threshold values before storing it, as the RSSI averaging 9602 * algorithm uses a scaled up value as well. Change this scaling 9603 * factor if the RSSI averaging algorithm changes. 9604 */ 9605 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 9606 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 9607 } 9608 9609 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 9610 int rssi_min_thold, 9611 int rssi_max_thold) 9612 { 9613 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9614 9615 WARN_ON(rssi_min_thold == rssi_max_thold || 9616 rssi_min_thold > rssi_max_thold); 9617 9618 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 9619 rssi_max_thold); 9620 } 9621 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 9622 9623 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 9624 { 9625 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9626 9627 _ieee80211_enable_rssi_reports(sdata, 0, 0); 9628 } 9629 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 9630 9631 static void ieee80211_ml_reconf_selectors(unsigned long *userspace_selectors) 9632 { 9633 *userspace_selectors = 0; 9634 9635 /* these selectors are mandatory for ML reconfiguration */ 9636 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, userspace_selectors); 9637 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, userspace_selectors); 9638 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, userspace_selectors); 9639 } 9640 9641 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 9642 struct ieee80211_mgmt *mgmt, size_t len) 9643 { 9644 struct ieee80211_local *local = sdata->local; 9645 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9646 struct ieee80211_mgd_assoc_data *add_links_data = 9647 ifmgd->reconf.add_links_data; 9648 struct sta_info *sta; 9649 struct cfg80211_mlo_reconf_done_data done_data = {}; 9650 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 9651 sdata->u.mgd.reconf.removed_links; 9652 u16 link_mask, valid_links; 9653 unsigned int link_id; 9654 unsigned long userspace_selectors; 9655 size_t orig_len = len; 9656 u8 i, group_key_data_len; 9657 u8 *pos; 9658 9659 if (!ieee80211_vif_is_mld(&sdata->vif) || 9660 len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) || 9661 mgmt->u.action.u.ml_reconf_resp.dialog_token != 9662 sdata->u.mgd.reconf.dialog_token || 9663 !sta_changed_links) 9664 return; 9665 9666 pos = mgmt->u.action.u.ml_reconf_resp.variable; 9667 len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp); 9668 9669 /* each status duple is 3 octets */ 9670 if (len < mgmt->u.action.u.ml_reconf_resp.count * 3) { 9671 sdata_info(sdata, 9672 "mlo: reconf: unexpected len=%zu, count=%u\n", 9673 len, mgmt->u.action.u.ml_reconf_resp.count); 9674 goto disconnect; 9675 } 9676 9677 link_mask = sta_changed_links; 9678 for (i = 0; i < mgmt->u.action.u.ml_reconf_resp.count; i++) { 9679 u16 status = get_unaligned_le16(pos + 1); 9680 9681 link_id = *pos; 9682 9683 if (!(link_mask & BIT(link_id))) { 9684 sdata_info(sdata, 9685 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 9686 link_id, sta_changed_links); 9687 goto disconnect; 9688 } 9689 9690 /* clear the corresponding link, to detect the case that 9691 * the same link was included more than one time 9692 */ 9693 link_mask &= ~BIT(link_id); 9694 9695 /* Handle failure to remove links here. Failure to remove added 9696 * links will be done later in the flow. 9697 */ 9698 if (status != WLAN_STATUS_SUCCESS) { 9699 sdata_info(sdata, 9700 "mlo: reconf: failed on link=%u, status=%u\n", 9701 link_id, status); 9702 9703 /* The AP MLD failed to remove a link that was already 9704 * removed locally. As this is not expected behavior, 9705 * disconnect 9706 */ 9707 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 9708 goto disconnect; 9709 9710 /* The AP MLD failed to add a link. Remove it from the 9711 * added links. 9712 */ 9713 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 9714 } 9715 9716 pos += 3; 9717 len -= 3; 9718 } 9719 9720 if (link_mask) { 9721 sdata_info(sdata, 9722 "mlo: reconf: no response for links=0x%x\n", 9723 link_mask); 9724 goto disconnect; 9725 } 9726 9727 if (!sdata->u.mgd.reconf.added_links) 9728 goto out; 9729 9730 if (len < 1 || len < 1 + *pos) { 9731 sdata_info(sdata, 9732 "mlo: reconf: invalid group key data length"); 9733 goto disconnect; 9734 } 9735 9736 /* The Group Key Data field must be present when links are added. This 9737 * field should be processed by userland. 9738 */ 9739 group_key_data_len = *pos++; 9740 9741 pos += group_key_data_len; 9742 len -= group_key_data_len + 1; 9743 9744 /* Process the information for the added links */ 9745 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 9746 if (WARN_ON(!sta)) 9747 goto disconnect; 9748 9749 valid_links = sdata->vif.valid_links; 9750 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 9751 if (!add_links_data->link[link_id].bss || 9752 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 9753 9754 continue; 9755 9756 valid_links |= BIT(link_id); 9757 if (ieee80211_sta_allocate_link(sta, link_id)) 9758 goto disconnect; 9759 } 9760 9761 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 9762 ieee80211_ml_reconf_selectors(&userspace_selectors); 9763 link_mask = 0; 9764 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 9765 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 9766 struct ieee80211_link_data *link; 9767 struct link_sta_info *link_sta; 9768 u64 changed = 0; 9769 9770 if (!cbss) 9771 continue; 9772 9773 link = sdata_dereference(sdata->link[link_id], sdata); 9774 if (WARN_ON(!link)) 9775 goto disconnect; 9776 9777 link_info(link, 9778 "mlo: reconf: local address %pM, AP link address %pM\n", 9779 add_links_data->link[link_id].addr, 9780 add_links_data->link[link_id].bss->bssid); 9781 9782 link_sta = rcu_dereference_protected(sta->link[link_id], 9783 lockdep_is_held(&local->hw.wiphy->mtx)); 9784 if (WARN_ON(!link_sta)) 9785 goto disconnect; 9786 9787 if (!link->u.mgd.have_beacon) { 9788 const struct cfg80211_bss_ies *ies; 9789 9790 rcu_read_lock(); 9791 ies = rcu_dereference(cbss->beacon_ies); 9792 if (ies) 9793 link->u.mgd.have_beacon = true; 9794 else 9795 ies = rcu_dereference(cbss->ies); 9796 ieee80211_get_dtim(ies, 9797 &link->conf->sync_dtim_count, 9798 &link->u.mgd.dtim_period); 9799 link->conf->beacon_int = cbss->beacon_interval; 9800 rcu_read_unlock(); 9801 } 9802 9803 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 9804 9805 link->u.mgd.conn = add_links_data->link[link_id].conn; 9806 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 9807 true, &link->u.mgd.conn, 9808 &userspace_selectors)) { 9809 link_info(link, "mlo: reconf: prep_channel failed\n"); 9810 goto disconnect; 9811 } 9812 9813 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 9814 add_links_data->link[link_id].bss)) 9815 goto disconnect; 9816 9817 if (!ieee80211_assoc_config_link(link, link_sta, 9818 add_links_data->link[link_id].bss, 9819 mgmt, pos, len, 9820 &changed)) 9821 goto disconnect; 9822 9823 /* The AP MLD indicated success for this link, but the station 9824 * profile status indicated otherwise. Since there is an 9825 * inconsistency in the ML reconfiguration response, disconnect 9826 */ 9827 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 9828 goto disconnect; 9829 9830 ieee80211_sta_init_nss(link_sta); 9831 if (ieee80211_sta_activate_link(sta, link_id)) 9832 goto disconnect; 9833 9834 changed |= ieee80211_link_set_associated(link, cbss); 9835 ieee80211_link_info_change_notify(sdata, link, changed); 9836 9837 ieee80211_recalc_smps(sdata, link); 9838 link_mask |= BIT(link_id); 9839 } 9840 9841 sdata_info(sdata, 9842 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 9843 valid_links, link_mask); 9844 9845 /* links might have changed due to rejected ones, set them again */ 9846 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 9847 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 9848 9849 ieee80211_recalc_ps(local); 9850 ieee80211_recalc_ps_vif(sdata); 9851 9852 done_data.buf = (const u8 *)mgmt; 9853 done_data.len = orig_len; 9854 done_data.added_links = link_mask; 9855 9856 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) 9857 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 9858 9859 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 9860 kfree(sdata->u.mgd.reconf.add_links_data); 9861 sdata->u.mgd.reconf.add_links_data = NULL; 9862 out: 9863 ieee80211_ml_reconf_reset(sdata); 9864 return; 9865 9866 disconnect: 9867 __ieee80211_disconnect(sdata); 9868 } 9869 9870 static struct sk_buff * 9871 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 9872 struct ieee80211_mgd_assoc_data *add_links_data, 9873 u16 removed_links) 9874 { 9875 struct ieee80211_local *local = sdata->local; 9876 struct ieee80211_mgmt *mgmt; 9877 struct ieee80211_multi_link_elem *ml_elem; 9878 struct ieee80211_mle_basic_common_info *common; 9879 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 9880 struct sk_buff *skb; 9881 size_t size; 9882 unsigned int link_id; 9883 __le16 eml_capa = 0, mld_capa_ops = 0; 9884 struct ieee80211_tx_info *info; 9885 u8 common_size, var_common_size; 9886 u8 *ml_elem_len; 9887 u16 capab = 0; 9888 9889 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 9890 9891 /* Consider the maximal length of the reconfiguration ML element */ 9892 size += sizeof(struct ieee80211_multi_link_elem); 9893 9894 /* The Basic ML element and the Reconfiguration ML element have the same 9895 * fixed common information fields in the context of ML reconfiguration 9896 * action frame. The AP MLD MAC address must always be present 9897 */ 9898 common_size = sizeof(*common); 9899 9900 /* when adding links, the MLD capabilities must be present */ 9901 var_common_size = 0; 9902 if (add_links_data) { 9903 const struct wiphy_iftype_ext_capab *ift_ext_capa = 9904 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 9905 ieee80211_vif_type_p2p(&sdata->vif)); 9906 9907 if (ift_ext_capa) { 9908 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 9909 mld_capa_ops = 9910 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 9911 } 9912 9913 /* MLD capabilities and operation */ 9914 var_common_size += 2; 9915 9916 /* EML capabilities */ 9917 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 9918 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 9919 var_common_size += 2; 9920 } 9921 9922 /* Add the common information length */ 9923 size += common_size + var_common_size; 9924 9925 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 9926 struct cfg80211_bss *cbss; 9927 size_t elems_len; 9928 9929 if (removed_links & BIT(link_id)) { 9930 size += sizeof(struct ieee80211_mle_per_sta_profile) + 9931 ETH_ALEN; 9932 continue; 9933 } 9934 9935 if (!add_links_data || !add_links_data->link[link_id].bss) 9936 continue; 9937 9938 elems_len = add_links_data->link[link_id].elems_len; 9939 cbss = add_links_data->link[link_id].bss; 9940 9941 /* should be the same across all BSSes */ 9942 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 9943 capab |= WLAN_CAPABILITY_PRIVACY; 9944 9945 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 9946 ETH_ALEN; 9947 9948 /* SSID element + WMM */ 9949 size += 2 + sdata->vif.cfg.ssid_len + 9; 9950 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 9951 elems_len); 9952 } 9953 9954 skb = alloc_skb(size, GFP_KERNEL); 9955 if (!skb) 9956 return NULL; 9957 9958 skb_reserve(skb, local->hw.extra_tx_headroom); 9959 mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt, 9960 u.action.u.ml_reconf_req)); 9961 9962 /* Add the MAC header */ 9963 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 9964 IEEE80211_STYPE_ACTION); 9965 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 9966 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 9967 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 9968 9969 /* Add the action frame fixed fields */ 9970 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 9971 mgmt->u.action.u.ml_reconf_req.action_code = 9972 WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 9973 9974 /* allocate a dialog token and store it */ 9975 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 9976 mgmt->u.action.u.ml_reconf_req.dialog_token = 9977 sdata->u.mgd.reconf.dialog_token; 9978 9979 /* Add the ML reconfiguration element and the common information */ 9980 skb_put_u8(skb, WLAN_EID_EXTENSION); 9981 ml_elem_len = skb_put(skb, 1); 9982 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 9983 ml_elem = skb_put(skb, sizeof(*ml_elem)); 9984 ml_elem->control = 9985 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 9986 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 9987 common = skb_put(skb, common_size); 9988 common->len = common_size + var_common_size; 9989 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 9990 9991 if (add_links_data) { 9992 if (eml_capa & 9993 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 9994 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 9995 ml_elem->control |= 9996 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 9997 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 9998 } 9999 10000 ml_elem->control |= 10001 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10002 10003 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10004 } 10005 10006 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10007 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10008 10009 /* Add the per station profile */ 10010 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10011 u8 *subelem_len = NULL; 10012 u16 ctrl; 10013 const u8 *addr; 10014 10015 /* Skip links that are not changing */ 10016 if (!(removed_links & BIT(link_id)) && 10017 (!add_links_data || !add_links_data->link[link_id].bss)) 10018 continue; 10019 10020 ctrl = link_id | 10021 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10022 10023 if (removed_links & BIT(link_id)) { 10024 struct ieee80211_bss_conf *conf = 10025 sdata_dereference(sdata->vif.link_conf[link_id], 10026 sdata); 10027 if (!conf) 10028 continue; 10029 10030 addr = conf->addr; 10031 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10032 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10033 } else { 10034 addr = add_links_data->link[link_id].addr; 10035 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10036 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10037 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10038 } 10039 10040 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10041 subelem_len = skb_put(skb, 1); 10042 10043 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10044 skb_put_u8(skb, 1 + ETH_ALEN); 10045 skb_put_data(skb, addr, ETH_ALEN); 10046 10047 if (!(removed_links & BIT(link_id))) { 10048 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10049 size_t extra_used; 10050 void *capab_pos; 10051 u8 qos_info; 10052 10053 capab_pos = skb_put(skb, 2); 10054 10055 skb_put_u8(skb, WLAN_EID_SSID); 10056 skb_put_u8(skb, sdata->vif.cfg.ssid_len); 10057 skb_put_data(skb, sdata->vif.cfg.ssid, 10058 sdata->vif.cfg.ssid_len); 10059 10060 extra_used = 10061 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10062 add_links_data->link[link_id].elems, 10063 add_links_data->link[link_id].elems_len, 10064 link_id, NULL, 10065 link_present_elems, 10066 add_links_data); 10067 10068 if (add_links_data->link[link_id].elems) 10069 skb_put_data(skb, 10070 add_links_data->link[link_id].elems + 10071 extra_used, 10072 add_links_data->link[link_id].elems_len - 10073 extra_used); 10074 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10075 qos_info = sdata->u.mgd.uapsd_queues; 10076 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10077 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10078 } else { 10079 qos_info = 0; 10080 } 10081 10082 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10083 put_unaligned_le16(capab, capab_pos); 10084 } 10085 10086 ieee80211_fragment_element(skb, subelem_len, 10087 IEEE80211_MLE_SUBELEM_FRAGMENT); 10088 } 10089 10090 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10091 10092 info = IEEE80211_SKB_CB(skb); 10093 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10094 10095 return skb; 10096 } 10097 10098 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10099 struct cfg80211_assoc_link *add_links, 10100 u16 rem_links) 10101 { 10102 struct ieee80211_local *local = sdata->local; 10103 struct ieee80211_mgd_assoc_data *data = NULL; 10104 struct sta_info *sta; 10105 struct sk_buff *skb; 10106 u16 added_links, new_valid_links; 10107 int link_id, err; 10108 10109 if (!ieee80211_vif_is_mld(&sdata->vif) || 10110 !(sdata->vif.cfg.mld_capa_op & 10111 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10112 return -EINVAL; 10113 10114 /* No support for concurrent ML reconfiguration operation */ 10115 if (sdata->u.mgd.reconf.added_links || 10116 sdata->u.mgd.reconf.removed_links) 10117 return -EBUSY; 10118 10119 added_links = 0; 10120 for (link_id = 0; add_links && link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10121 link_id++) { 10122 if (!add_links[link_id].bss) 10123 continue; 10124 10125 added_links |= BIT(link_id); 10126 } 10127 10128 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10129 if (WARN_ON(!sta)) 10130 return -ENOLINK; 10131 10132 if (rem_links & BIT(sta->sta.deflink.link_id)) 10133 return -EINVAL; 10134 10135 /* Adding links to the set of valid link is done only after a successful 10136 * ML reconfiguration frame exchange. Here prepare the data for the ML 10137 * reconfiguration frame construction and allocate the required 10138 * resources 10139 */ 10140 if (added_links) { 10141 bool uapsd_supported; 10142 unsigned long userspace_selectors; 10143 10144 data = kzalloc(sizeof(*data), GFP_KERNEL); 10145 if (!data) 10146 return -ENOMEM; 10147 10148 uapsd_supported = true; 10149 ieee80211_ml_reconf_selectors(&userspace_selectors); 10150 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10151 link_id++) { 10152 struct ieee80211_supported_band *sband; 10153 struct cfg80211_bss *link_cbss = add_links[link_id].bss; 10154 struct ieee80211_bss *bss; 10155 10156 if (!link_cbss) 10157 continue; 10158 10159 bss = (void *)link_cbss->priv; 10160 10161 if (!bss->wmm_used) { 10162 err = -EINVAL; 10163 goto err_free; 10164 } 10165 10166 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10167 err = -EINVAL; 10168 goto err_free; 10169 } 10170 10171 eth_random_addr(data->link[link_id].addr); 10172 data->link[link_id].conn = 10173 ieee80211_conn_settings_unlimited; 10174 sband = 10175 local->hw.wiphy->bands[link_cbss->channel->band]; 10176 10177 ieee80211_determine_our_sta_mode(sdata, sband, 10178 NULL, true, link_id, 10179 &data->link[link_id].conn); 10180 10181 data->link[link_id].bss = link_cbss; 10182 data->link[link_id].disabled = 10183 add_links[link_id].disabled; 10184 data->link[link_id].elems = 10185 (u8 *)add_links[link_id].elems; 10186 data->link[link_id].elems_len = 10187 add_links[link_id].elems_len; 10188 10189 if (!bss->uapsd_supported) 10190 uapsd_supported = false; 10191 10192 if (data->link[link_id].conn.mode < 10193 IEEE80211_CONN_MODE_EHT) { 10194 err = -EINVAL; 10195 goto err_free; 10196 } 10197 10198 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10199 link_id); 10200 if (err) { 10201 err = -EINVAL; 10202 goto err_free; 10203 } 10204 } 10205 10206 /* Require U-APSD support to be similar to the current valid 10207 * links 10208 */ 10209 if (uapsd_supported != 10210 !!(sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED)) { 10211 err = -EINVAL; 10212 goto err_free; 10213 } 10214 10215 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10216 link_id++) { 10217 if (!data->link[link_id].bss) 10218 continue; 10219 10220 /* only used to verify the mode, nothing is allocated */ 10221 err = ieee80211_prep_channel(sdata, NULL, link_id, 10222 data->link[link_id].bss, 10223 true, 10224 &data->link[link_id].conn, 10225 &userspace_selectors); 10226 if (err) 10227 goto err_free; 10228 } 10229 } 10230 10231 /* link removal is done before the ML reconfiguration frame exchange so 10232 * that these links will not be used between their removal by the AP MLD 10233 * and before the station got the ML reconfiguration response. Based on 10234 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 10235 * link removal request. 10236 */ 10237 if (rem_links) { 10238 u16 new_active_links = sdata->vif.active_links & ~rem_links; 10239 10240 new_valid_links = sdata->vif.valid_links & ~rem_links; 10241 10242 /* Should not be left with no valid links to perform the 10243 * ML reconfiguration 10244 */ 10245 if (!new_valid_links || 10246 !(new_valid_links & ~sdata->vif.dormant_links)) { 10247 sdata_info(sdata, "mlo: reconf: no valid links\n"); 10248 err = -EINVAL; 10249 goto err_free; 10250 } 10251 10252 if (new_active_links != sdata->vif.active_links) { 10253 if (!new_active_links) 10254 new_active_links = 10255 BIT(__ffs(new_valid_links & 10256 ~sdata->vif.dormant_links)); 10257 10258 err = ieee80211_set_active_links(&sdata->vif, 10259 new_active_links); 10260 if (err) { 10261 sdata_info(sdata, 10262 "mlo: reconf: failed set active links\n"); 10263 goto err_free; 10264 } 10265 } 10266 } 10267 10268 /* Build the SKB before the link removal as the construction of the 10269 * station info for removed links requires the local address. 10270 * Invalidate the removed links, so that the transmission of the ML 10271 * reconfiguration request frame would not be done using them, as the AP 10272 * is expected to send the ML reconfiguration response frame on the link 10273 * on which the request was received. 10274 */ 10275 skb = ieee80211_build_ml_reconf_req(sdata, data, rem_links); 10276 if (!skb) { 10277 err = -ENOMEM; 10278 goto err_free; 10279 } 10280 10281 if (rem_links) { 10282 u16 new_dormant_links = sdata->vif.dormant_links & ~rem_links; 10283 10284 err = ieee80211_vif_set_links(sdata, new_valid_links, 10285 new_dormant_links); 10286 if (err) { 10287 sdata_info(sdata, 10288 "mlo: reconf: failed set valid links\n"); 10289 kfree_skb(skb); 10290 goto err_free; 10291 } 10292 10293 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10294 link_id++) { 10295 if (!(rem_links & BIT(link_id))) 10296 continue; 10297 10298 ieee80211_sta_remove_link(sta, link_id); 10299 } 10300 10301 /* notify the driver and upper layers */ 10302 ieee80211_vif_cfg_change_notify(sdata, 10303 BSS_CHANGED_MLD_VALID_LINKS); 10304 cfg80211_links_removed(sdata->dev, rem_links); 10305 } 10306 10307 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 10308 added_links, rem_links); 10309 10310 ieee80211_tx_skb(sdata, skb); 10311 10312 sdata->u.mgd.reconf.added_links = added_links; 10313 sdata->u.mgd.reconf.add_links_data = data; 10314 sdata->u.mgd.reconf.removed_links = rem_links; 10315 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 10316 &sdata->u.mgd.reconf.wk, 10317 IEEE80211_ASSOC_TIMEOUT_SHORT); 10318 return 0; 10319 10320 err_free: 10321 kfree(data); 10322 return err; 10323 } 10324