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 const struct ieee80211_he_cap_elem *he_cap, 348 const struct ieee80211_he_operation *he_op) 349 { 350 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 351 u16 mcs_80_map_tx, mcs_80_map_rx; 352 u16 ap_min_req_set; 353 int nss; 354 355 if (!he_cap) 356 return false; 357 358 /* mcs_nss is right after he_cap info */ 359 he_mcs_nss_supp = (void *)(he_cap + 1); 360 361 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 362 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 363 364 /* P802.11-REVme/D0.3 365 * 27.1.1 Introduction to the HE PHY 366 * ... 367 * An HE STA shall support the following features: 368 * ... 369 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 370 * supported channel widths for HE SU PPDUs 371 */ 372 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 373 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 374 sdata_info(sdata, 375 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 376 mcs_80_map_tx, mcs_80_map_rx); 377 return false; 378 } 379 380 if (!he_op) 381 return true; 382 383 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 384 385 /* 386 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 387 * zeroes, which is nonsense, and completely inconsistent with itself 388 * (it doesn't have 8 streams). Accept the settings in this case anyway. 389 */ 390 if (!ap_min_req_set) 391 return true; 392 393 /* make sure the AP is consistent with itself 394 * 395 * P802.11-REVme/D0.3 396 * 26.17.1 Basic HE BSS operation 397 * 398 * A STA that is operating in an HE BSS shall be able to receive and 399 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 400 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 401 * MLME-START.request primitive and shall be able to receive at each of 402 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 403 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 404 * primitive 405 */ 406 for (nss = 8; nss > 0; nss--) { 407 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 408 u8 ap_rx_val; 409 u8 ap_tx_val; 410 411 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 412 continue; 413 414 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 415 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 416 417 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 418 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 419 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 420 sdata_info(sdata, 421 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 422 nss, ap_rx_val, ap_rx_val, ap_op_val); 423 return false; 424 } 425 } 426 427 return true; 428 } 429 430 static bool 431 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 432 struct ieee80211_supported_band *sband, 433 const struct ieee80211_he_operation *he_op) 434 { 435 const struct ieee80211_sta_he_cap *sta_he_cap = 436 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 437 u16 ap_min_req_set; 438 int i; 439 440 if (!sta_he_cap || !he_op) 441 return false; 442 443 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 444 445 /* 446 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 447 * zeroes, which is nonsense, and completely inconsistent with itself 448 * (it doesn't have 8 streams). Accept the settings in this case anyway. 449 */ 450 if (!ap_min_req_set) 451 return true; 452 453 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 454 for (i = 0; i < 3; i++) { 455 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 456 &sta_he_cap->he_mcs_nss_supp; 457 u16 sta_mcs_map_rx = 458 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 459 u16 sta_mcs_map_tx = 460 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 461 u8 nss; 462 bool verified = true; 463 464 /* 465 * For each band there is a maximum of 8 spatial streams 466 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 467 * of 2 bits per NSS (1-8), with the values defined in enum 468 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 469 * capabilities aren't less than the AP's minimum requirements 470 * for this HE BSS per SS. 471 * It is enough to find one such band that meets the reqs. 472 */ 473 for (nss = 8; nss > 0; nss--) { 474 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 475 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 476 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 477 478 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 479 continue; 480 481 /* 482 * Make sure the HE AP doesn't require MCSs that aren't 483 * supported by the client as required by spec 484 * 485 * P802.11-REVme/D0.3 486 * 26.17.1 Basic HE BSS operation 487 * 488 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 489 * a BSS, unless it supports (i.e., is able to both transmit and 490 * receive using) all of the <HE-MCS, NSS> tuples in the basic 491 * HE-MCS and NSS set. 492 */ 493 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 494 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 495 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 496 verified = false; 497 break; 498 } 499 } 500 501 if (verified) 502 return true; 503 } 504 505 /* If here, STA doesn't meet AP's HE min requirements */ 506 return false; 507 } 508 509 static u8 510 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 511 const struct ieee80211_sta_eht_cap *sta_eht_cap, 512 unsigned int idx, int bw) 513 { 514 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 515 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 516 517 /* handle us being a 20 MHz-only EHT STA - with four values 518 * for MCS 0-7, 8-9, 10-11, 12-13. 519 */ 520 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 521 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 522 523 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 524 if (idx > 0) 525 idx--; 526 527 switch (bw) { 528 case 0: 529 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 530 case 1: 531 if (!(he_phy_cap0 & 532 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 533 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 534 return 0xff; /* pass check */ 535 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 536 case 2: 537 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 538 return 0xff; /* pass check */ 539 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 540 } 541 542 WARN_ON(1); 543 return 0; 544 } 545 546 static bool 547 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 548 struct ieee80211_supported_band *sband, 549 const struct ieee80211_eht_operation *eht_op) 550 { 551 const struct ieee80211_sta_he_cap *sta_he_cap = 552 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 553 const struct ieee80211_sta_eht_cap *sta_eht_cap = 554 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 555 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 556 unsigned int i; 557 558 if (!sta_he_cap || !sta_eht_cap || !eht_op) 559 return false; 560 561 req = &eht_op->basic_mcs_nss; 562 563 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 564 u8 req_rx_nss, req_tx_nss; 565 unsigned int bw; 566 567 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 568 IEEE80211_EHT_MCS_NSS_RX); 569 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 570 IEEE80211_EHT_MCS_NSS_TX); 571 572 for (bw = 0; bw < 3; bw++) { 573 u8 have, have_rx_nss, have_tx_nss; 574 575 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 576 sta_eht_cap, 577 i, bw); 578 have_rx_nss = u8_get_bits(have, 579 IEEE80211_EHT_MCS_NSS_RX); 580 have_tx_nss = u8_get_bits(have, 581 IEEE80211_EHT_MCS_NSS_TX); 582 583 if (req_rx_nss > have_rx_nss || 584 req_tx_nss > have_tx_nss) 585 return false; 586 } 587 } 588 589 return true; 590 } 591 592 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 593 const struct cfg80211_chan_def *chandef, 594 u32 prohibited_flags) 595 { 596 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 597 chandef, prohibited_flags)) 598 return false; 599 600 if (chandef->punctured && 601 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 602 return false; 603 604 if (chandef->punctured && chandef->chan->band == NL80211_BAND_5GHZ && 605 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING_5GHZ)) 606 return false; 607 608 return true; 609 } 610 611 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 612 { 613 if (c->width == NL80211_CHAN_WIDTH_80P80) 614 return 4 + 4; 615 616 return nl80211_chan_width_to_mhz(c->width) / 20; 617 } 618 619 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 620 { 621 switch (c->width) { 622 case NL80211_CHAN_WIDTH_20: 623 case NL80211_CHAN_WIDTH_20_NOHT: 624 return 1; 625 case NL80211_CHAN_WIDTH_40: 626 return 2; 627 case NL80211_CHAN_WIDTH_80P80: 628 case NL80211_CHAN_WIDTH_80: 629 return 3; 630 case NL80211_CHAN_WIDTH_160: 631 return 4; 632 case NL80211_CHAN_WIDTH_320: 633 return 5; 634 default: 635 WARN_ON(1); 636 return 0; 637 } 638 } 639 640 VISIBLE_IF_MAC80211_KUNIT int 641 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 642 u8 n_partial_subchans) 643 { 644 int n = ieee80211_chandef_num_subchans(ap); 645 struct cfg80211_chan_def tmp = *ap; 646 int offset = 0; 647 648 /* 649 * Given a chandef (in this context, it's the AP's) and a number 650 * of subchannels that we want to look at ('n_partial_subchans'), 651 * calculate the offset in number of subchannels between the full 652 * and the subset with the desired width. 653 */ 654 655 /* same number of subchannels means no offset, obviously */ 656 if (n == n_partial_subchans) 657 return 0; 658 659 /* don't WARN - misconfigured APs could cause this if their N > width */ 660 if (n < n_partial_subchans) 661 return 0; 662 663 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 664 u32 prev = tmp.center_freq1; 665 666 ieee80211_chandef_downgrade(&tmp, NULL); 667 668 /* 669 * if center_freq moved up, half the original channels 670 * are gone now but were below, so increase offset 671 */ 672 if (prev < tmp.center_freq1) 673 offset += ieee80211_chandef_num_subchans(&tmp); 674 } 675 676 /* 677 * 80+80 with secondary 80 below primary - four subchannels for it 678 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 679 */ 680 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 681 ap->center_freq2 < ap->center_freq1) 682 offset += 4; 683 684 return offset; 685 } 686 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 687 688 VISIBLE_IF_MAC80211_KUNIT void 689 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 690 const struct cfg80211_chan_def *ap, 691 const struct cfg80211_chan_def *used) 692 { 693 u8 needed = ieee80211_chandef_num_subchans(used); 694 u8 have = ieee80211_chandef_num_subchans(ap); 695 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 696 u8 offset; 697 698 if (!psd->valid) 699 return; 700 701 /* if N is zero, all defaults were used, no point in rearranging */ 702 if (!psd->n) 703 goto out; 704 705 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 706 707 /* 708 * This assumes that 'N' is consistent with the HE channel, as 709 * it should be (otherwise the AP is broken). 710 * 711 * In psd->power we have values in the order 0..N, 0..K, where 712 * N+K should cover the entire channel per 'ap', but even if it 713 * doesn't then we've pre-filled 'unlimited' as defaults. 714 * 715 * But this is all the wrong order, we want to have them in the 716 * order of the 'used' channel. 717 * 718 * So for example, we could have a 320 MHz EHT AP, which has the 719 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 720 * seem to be considered for the TPE), as follows: 721 * 722 * EHT 320: | | | | | | | | | | | | | | | | | 723 * HE 80: | | | | | 724 * used 160: | | | | | | | | | 725 * 726 * N entries: |--|--|--|--| 727 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 728 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 729 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 730 * used chan: 0 1 2 3 4 5 6 7 731 * 732 * The idx in the power array ('power idx') is like this since it 733 * comes directly from the element's N and K entries in their 734 * element order, and those are this way for HE compatibility. 735 * 736 * Rearrange them as desired here, first by putting them into the 737 * 'full chan' order, and then selecting the necessary subset for 738 * the 'used chan'. 739 */ 740 741 /* first reorder according to AP channel */ 742 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 743 for (int i = 0; i < have; i++) { 744 if (i < offset) 745 tmp[i] = psd->power[i + psd->n]; 746 else if (i < offset + psd->n) 747 tmp[i] = psd->power[i - offset]; 748 else 749 tmp[i] = psd->power[i]; 750 } 751 752 /* 753 * and then select the subset for the used channel 754 * (set everything to defaults first in case a driver is confused) 755 */ 756 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 757 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 758 for (int i = 0; i < needed; i++) 759 psd->power[i] = tmp[offset + i]; 760 761 out: 762 /* limit, but don't lie if there are defaults in the data */ 763 if (needed < psd->count) 764 psd->count = needed; 765 } 766 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 767 768 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 769 const struct cfg80211_chan_def *ap, 770 const struct cfg80211_chan_def *used) 771 { 772 /* ignore this completely for narrow/invalid channels */ 773 if (!ieee80211_chandef_num_subchans(ap) || 774 !ieee80211_chandef_num_subchans(used)) { 775 ieee80211_clear_tpe(tpe); 776 return; 777 } 778 779 for (int i = 0; i < 2; i++) { 780 int needed_pwr_count; 781 782 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 783 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 784 785 /* limit this to the widths we actually need */ 786 needed_pwr_count = ieee80211_chandef_num_widths(used); 787 if (needed_pwr_count < tpe->max_local[i].count) 788 tpe->max_local[i].count = needed_pwr_count; 789 if (needed_pwr_count < tpe->max_reg_client[i].count) 790 tpe->max_reg_client[i].count = needed_pwr_count; 791 } 792 } 793 794 /* 795 * The AP part of the channel request is used to distinguish settings 796 * to the device used for wider bandwidth OFDMA. This is used in the 797 * channel context code to assign two channel contexts even if they're 798 * both for the same channel, if the AP bandwidths are incompatible. 799 * If not EHT (or driver override) then ap.chan == NULL indicates that 800 * there's no wider BW OFDMA used. 801 */ 802 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 803 struct ieee80211_chan_req *chanreq, 804 struct ieee80211_conn_settings *conn, 805 struct cfg80211_chan_def *ap_chandef) 806 { 807 chanreq->ap.chan = NULL; 808 809 if (conn->mode < IEEE80211_CONN_MODE_EHT) 810 return; 811 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 812 return; 813 814 chanreq->ap = *ap_chandef; 815 } 816 817 static struct ieee802_11_elems * 818 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 819 struct ieee80211_conn_settings *conn, 820 struct cfg80211_bss *cbss, int link_id, 821 struct ieee80211_chan_req *chanreq, 822 struct cfg80211_chan_def *ap_chandef) 823 { 824 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 825 struct ieee80211_bss *bss = (void *)cbss->priv; 826 struct ieee80211_channel *channel = cbss->channel; 827 struct ieee80211_elems_parse_params parse_params = { 828 .link_id = -1, 829 .from_ap = true, 830 .start = ies->data, 831 .len = ies->len, 832 }; 833 struct ieee802_11_elems *elems; 834 struct ieee80211_supported_band *sband; 835 enum ieee80211_conn_mode ap_mode; 836 int ret; 837 838 again: 839 parse_params.mode = conn->mode; 840 elems = ieee802_11_parse_elems_full(&parse_params); 841 if (!elems) 842 return ERR_PTR(-ENOMEM); 843 844 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 845 elems, false, conn, ap_chandef); 846 847 /* this should be impossible since parsing depends on our mode */ 848 if (WARN_ON(ap_mode > conn->mode)) { 849 ret = -EINVAL; 850 goto free; 851 } 852 853 if (conn->mode != ap_mode) { 854 conn->mode = ap_mode; 855 kfree(elems); 856 goto again; 857 } 858 859 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 860 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 861 862 sband = sdata->local->hw.wiphy->bands[channel->band]; 863 864 switch (channel->band) { 865 case NL80211_BAND_S1GHZ: 866 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 867 ret = -EINVAL; 868 goto free; 869 } 870 return elems; 871 case NL80211_BAND_6GHZ: 872 if (ap_mode < IEEE80211_CONN_MODE_HE) { 873 sdata_info(sdata, 874 "Rejecting non-HE 6/7 GHz connection"); 875 ret = -EINVAL; 876 goto free; 877 } 878 break; 879 default: 880 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 881 ret = -EINVAL; 882 goto free; 883 } 884 } 885 886 switch (ap_mode) { 887 case IEEE80211_CONN_MODE_S1G: 888 WARN_ON(1); 889 ret = -EINVAL; 890 goto free; 891 case IEEE80211_CONN_MODE_LEGACY: 892 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 893 break; 894 case IEEE80211_CONN_MODE_HT: 895 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 896 conn->bw_limit, 897 IEEE80211_CONN_BW_LIMIT_40); 898 break; 899 case IEEE80211_CONN_MODE_VHT: 900 case IEEE80211_CONN_MODE_HE: 901 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 902 conn->bw_limit, 903 IEEE80211_CONN_BW_LIMIT_160); 904 break; 905 case IEEE80211_CONN_MODE_EHT: 906 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 907 conn->bw_limit, 908 IEEE80211_CONN_BW_LIMIT_320); 909 break; 910 } 911 912 chanreq->oper = *ap_chandef; 913 914 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 915 916 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 917 IEEE80211_CHAN_DISABLED)) { 918 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 919 ret = -EINVAL; 920 goto free; 921 } 922 923 ieee80211_chanreq_downgrade(chanreq, conn); 924 } 925 926 if (conn->mode >= IEEE80211_CONN_MODE_HE && 927 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 928 IEEE80211_CHAN_NO_HE)) { 929 conn->mode = IEEE80211_CONN_MODE_VHT; 930 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 931 conn->bw_limit, 932 IEEE80211_CONN_BW_LIMIT_160); 933 } 934 935 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 936 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 937 IEEE80211_CHAN_NO_EHT)) { 938 conn->mode = IEEE80211_CONN_MODE_HE; 939 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 940 conn->bw_limit, 941 IEEE80211_CONN_BW_LIMIT_160); 942 } 943 944 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 945 sdata_info(sdata, 946 "regulatory prevented using AP config, downgraded\n"); 947 948 if (conn->mode >= IEEE80211_CONN_MODE_HE && 949 (!ieee80211_verify_peer_he_mcs_support(sdata, (void *)elems->he_cap, 950 elems->he_operation) || 951 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 952 elems->he_operation))) { 953 conn->mode = IEEE80211_CONN_MODE_VHT; 954 sdata_info(sdata, "required MCSes not supported, disabling HE\n"); 955 } 956 957 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 958 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 959 elems->eht_operation)) { 960 conn->mode = IEEE80211_CONN_MODE_HE; 961 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 962 conn->bw_limit, 963 IEEE80211_CONN_BW_LIMIT_160); 964 sdata_info(sdata, "required MCSes not supported, disabling EHT\n"); 965 } 966 967 /* the mode can only decrease, so this must terminate */ 968 if (ap_mode != conn->mode) { 969 kfree(elems); 970 goto again; 971 } 972 973 mlme_link_id_dbg(sdata, link_id, 974 "connecting with %s mode, max bandwidth %d MHz\n", 975 ieee80211_conn_mode_str(conn->mode), 976 20 * (1 << conn->bw_limit)); 977 978 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 979 ret = -EINVAL; 980 goto free; 981 } 982 983 return elems; 984 free: 985 kfree(elems); 986 return ERR_PTR(ret); 987 } 988 989 static int ieee80211_config_bw(struct ieee80211_link_data *link, 990 struct ieee802_11_elems *elems, 991 bool update, u64 *changed) 992 { 993 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 994 struct ieee80211_sub_if_data *sdata = link->sdata; 995 struct ieee80211_chan_req chanreq = {}; 996 struct cfg80211_chan_def ap_chandef; 997 enum ieee80211_conn_mode ap_mode; 998 u32 vht_cap_info = 0; 999 u16 ht_opmode; 1000 int ret; 1001 1002 /* don't track any bandwidth changes in legacy/S1G modes */ 1003 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1004 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1005 return 0; 1006 1007 if (elems->vht_cap_elem) 1008 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1009 1010 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1011 elems, true, &link->u.mgd.conn, 1012 &ap_chandef); 1013 1014 if (ap_mode != link->u.mgd.conn.mode) { 1015 link_info(link, 1016 "AP appears to change mode (expected %s, found %s), disconnect\n", 1017 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1018 ieee80211_conn_mode_str(ap_mode)); 1019 return -EINVAL; 1020 } 1021 1022 chanreq.oper = ap_chandef; 1023 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1024 &ap_chandef); 1025 1026 /* 1027 * if HT operation mode changed store the new one - 1028 * this may be applicable even if channel is identical 1029 */ 1030 if (elems->ht_operation) { 1031 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1032 if (link->conf->ht_operation_mode != ht_opmode) { 1033 *changed |= BSS_CHANGED_HT; 1034 link->conf->ht_operation_mode = ht_opmode; 1035 } 1036 } 1037 1038 /* 1039 * Downgrade the new channel if we associated with restricted 1040 * bandwidth capabilities. For example, if we associated as a 1041 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1042 * or config reasons) then switching to a 40 MHz channel now 1043 * won't do us any good -- we couldn't use it with the AP. 1044 */ 1045 while (link->u.mgd.conn.bw_limit < 1046 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1047 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1048 1049 if (ap_chandef.chan->band == NL80211_BAND_6GHZ && 1050 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1051 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1052 &chanreq.oper); 1053 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1054 link->conf->tpe = elems->tpe; 1055 *changed |= BSS_CHANGED_TPE; 1056 } 1057 } 1058 1059 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1060 return 0; 1061 1062 link_info(link, 1063 "AP %pM changed bandwidth, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1064 link->u.mgd.bssid, chanreq.oper.chan->center_freq, 1065 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1066 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1067 chanreq.oper.center_freq2); 1068 1069 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1070 sdata_info(sdata, 1071 "AP %pM changed caps/bw in a way we can't support - disconnect\n", 1072 link->u.mgd.bssid); 1073 return -EINVAL; 1074 } 1075 1076 if (!update) { 1077 link->conf->chanreq = chanreq; 1078 return 0; 1079 } 1080 1081 /* 1082 * We're tracking the current AP here, so don't do any further checks 1083 * here. This keeps us from playing ping-pong with regulatory, without 1084 * it the following can happen (for example): 1085 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1086 * - AP advertises regdom US 1087 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1088 * - we detect an unsupported channel and disconnect 1089 * - disconnect causes CRDA to reload world regdomain and the game 1090 * starts anew. 1091 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1092 * 1093 * It seems possible that there are still scenarios with CSA or real 1094 * bandwidth changes where a this could happen, but those cases are 1095 * less common and wouldn't completely prevent using the AP. 1096 */ 1097 1098 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1099 if (ret) { 1100 sdata_info(sdata, 1101 "AP %pM changed bandwidth to incompatible one - disconnect\n", 1102 link->u.mgd.bssid); 1103 return ret; 1104 } 1105 1106 cfg80211_schedule_channels_check(&sdata->wdev); 1107 return 0; 1108 } 1109 1110 /* frame sending functions */ 1111 1112 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1113 struct sk_buff *skb, u8 ap_ht_param, 1114 struct ieee80211_supported_band *sband, 1115 struct ieee80211_channel *channel, 1116 enum ieee80211_smps_mode smps, 1117 const struct ieee80211_conn_settings *conn) 1118 { 1119 u8 *pos; 1120 u32 flags = channel->flags; 1121 u16 cap; 1122 struct ieee80211_sta_ht_cap ht_cap; 1123 1124 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1125 1126 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1127 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1128 1129 /* determine capability flags */ 1130 cap = ht_cap.cap; 1131 1132 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1133 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1134 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1135 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1136 cap &= ~IEEE80211_HT_CAP_SGI_40; 1137 } 1138 break; 1139 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1140 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1141 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1142 cap &= ~IEEE80211_HT_CAP_SGI_40; 1143 } 1144 break; 1145 } 1146 1147 /* 1148 * If 40 MHz was disabled associate as though we weren't 1149 * capable of 40 MHz -- some broken APs will never fall 1150 * back to trying to transmit in 20 MHz. 1151 */ 1152 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1153 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1154 cap &= ~IEEE80211_HT_CAP_SGI_40; 1155 } 1156 1157 /* set SM PS mode properly */ 1158 cap &= ~IEEE80211_HT_CAP_SM_PS; 1159 switch (smps) { 1160 case IEEE80211_SMPS_AUTOMATIC: 1161 case IEEE80211_SMPS_NUM_MODES: 1162 WARN_ON(1); 1163 fallthrough; 1164 case IEEE80211_SMPS_OFF: 1165 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1166 IEEE80211_HT_CAP_SM_PS_SHIFT; 1167 break; 1168 case IEEE80211_SMPS_STATIC: 1169 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1170 IEEE80211_HT_CAP_SM_PS_SHIFT; 1171 break; 1172 case IEEE80211_SMPS_DYNAMIC: 1173 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1174 IEEE80211_HT_CAP_SM_PS_SHIFT; 1175 break; 1176 } 1177 1178 /* reserve and fill IE */ 1179 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1180 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1181 } 1182 1183 /* This function determines vht capability flags for the association 1184 * and builds the IE. 1185 * Note - the function returns true to own the MU-MIMO capability 1186 */ 1187 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1188 struct sk_buff *skb, 1189 struct ieee80211_supported_band *sband, 1190 struct ieee80211_vht_cap *ap_vht_cap, 1191 const struct ieee80211_conn_settings *conn) 1192 { 1193 struct ieee80211_local *local = sdata->local; 1194 u8 *pos; 1195 u32 cap; 1196 struct ieee80211_sta_vht_cap vht_cap; 1197 u32 mask, ap_bf_sts, our_bf_sts; 1198 bool mu_mimo_owner = false; 1199 1200 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1201 1202 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1203 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1204 1205 /* determine capability flags */ 1206 cap = vht_cap.cap; 1207 1208 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1209 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1210 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1211 } 1212 1213 /* 1214 * Some APs apparently get confused if our capabilities are better 1215 * than theirs, so restrict what we advertise in the assoc request. 1216 */ 1217 if (!(ap_vht_cap->vht_cap_info & 1218 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1219 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1220 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1221 else if (!(ap_vht_cap->vht_cap_info & 1222 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1223 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1224 1225 /* 1226 * If some other vif is using the MU-MIMO capability we cannot associate 1227 * using MU-MIMO - this will lead to contradictions in the group-id 1228 * mechanism. 1229 * Ownership is defined since association request, in order to avoid 1230 * simultaneous associations with MU-MIMO. 1231 */ 1232 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1233 bool disable_mu_mimo = false; 1234 struct ieee80211_sub_if_data *other; 1235 1236 list_for_each_entry(other, &local->interfaces, list) { 1237 if (other->vif.bss_conf.mu_mimo_owner) { 1238 disable_mu_mimo = true; 1239 break; 1240 } 1241 } 1242 if (disable_mu_mimo) 1243 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1244 else 1245 mu_mimo_owner = true; 1246 } 1247 1248 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1249 1250 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1251 our_bf_sts = cap & mask; 1252 1253 if (ap_bf_sts < our_bf_sts) { 1254 cap &= ~mask; 1255 cap |= ap_bf_sts; 1256 } 1257 1258 /* reserve and fill IE */ 1259 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1260 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1261 1262 return mu_mimo_owner; 1263 } 1264 1265 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 1266 enum nl80211_chan_width width, 1267 struct ieee80211_supported_band *sband, 1268 struct ieee80211_mgd_assoc_data *assoc_data) 1269 { 1270 u32 rates; 1271 1272 if (assoc_data->supp_rates_len) { 1273 /* 1274 * Get all rates supported by the device and the AP as 1275 * some APs don't like getting a superset of their rates 1276 * in the association request (e.g. D-Link DAP 1353 in 1277 * b-only mode)... 1278 */ 1279 ieee80211_parse_bitrates(width, sband, 1280 assoc_data->supp_rates, 1281 assoc_data->supp_rates_len, 1282 &rates); 1283 } else { 1284 /* 1285 * In case AP not provide any supported rates information 1286 * before association, we send information element(s) with 1287 * all rates that we support. 1288 */ 1289 rates = ~0; 1290 } 1291 1292 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1293 WLAN_EID_SUPP_RATES); 1294 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1295 WLAN_EID_EXT_SUPP_RATES); 1296 } 1297 1298 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1299 const u8 *elems, 1300 size_t elems_len, 1301 size_t offset) 1302 { 1303 size_t noffset; 1304 1305 static const u8 before_ht[] = { 1306 WLAN_EID_SSID, 1307 WLAN_EID_SUPP_RATES, 1308 WLAN_EID_EXT_SUPP_RATES, 1309 WLAN_EID_PWR_CAPABILITY, 1310 WLAN_EID_SUPPORTED_CHANNELS, 1311 WLAN_EID_RSN, 1312 WLAN_EID_QOS_CAPA, 1313 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1314 WLAN_EID_MOBILITY_DOMAIN, 1315 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1316 WLAN_EID_RIC_DATA, /* reassoc only */ 1317 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1318 }; 1319 static const u8 after_ric[] = { 1320 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1321 WLAN_EID_HT_CAPABILITY, 1322 WLAN_EID_BSS_COEX_2040, 1323 /* luckily this is almost always there */ 1324 WLAN_EID_EXT_CAPABILITY, 1325 WLAN_EID_QOS_TRAFFIC_CAPA, 1326 WLAN_EID_TIM_BCAST_REQ, 1327 WLAN_EID_INTERWORKING, 1328 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1329 WLAN_EID_VHT_CAPABILITY, 1330 WLAN_EID_OPMODE_NOTIF, 1331 }; 1332 1333 if (!elems_len) 1334 return offset; 1335 1336 noffset = ieee80211_ie_split_ric(elems, elems_len, 1337 before_ht, 1338 ARRAY_SIZE(before_ht), 1339 after_ric, 1340 ARRAY_SIZE(after_ric), 1341 offset); 1342 skb_put_data(skb, elems + offset, noffset - offset); 1343 1344 return noffset; 1345 } 1346 1347 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1348 const u8 *elems, 1349 size_t elems_len, 1350 size_t offset) 1351 { 1352 static const u8 before_vht[] = { 1353 /* 1354 * no need to list the ones split off before HT 1355 * or generated here 1356 */ 1357 WLAN_EID_BSS_COEX_2040, 1358 WLAN_EID_EXT_CAPABILITY, 1359 WLAN_EID_QOS_TRAFFIC_CAPA, 1360 WLAN_EID_TIM_BCAST_REQ, 1361 WLAN_EID_INTERWORKING, 1362 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1363 }; 1364 size_t noffset; 1365 1366 if (!elems_len) 1367 return offset; 1368 1369 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1370 noffset = ieee80211_ie_split(elems, elems_len, 1371 before_vht, ARRAY_SIZE(before_vht), 1372 offset); 1373 skb_put_data(skb, elems + offset, noffset - offset); 1374 1375 return noffset; 1376 } 1377 1378 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1379 const u8 *elems, 1380 size_t elems_len, 1381 size_t offset) 1382 { 1383 static const u8 before_he[] = { 1384 /* 1385 * no need to list the ones split off before VHT 1386 * or generated here 1387 */ 1388 WLAN_EID_OPMODE_NOTIF, 1389 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1390 /* 11ai elements */ 1391 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1392 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1393 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1394 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1395 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1396 /* TODO: add 11ah/11aj/11ak elements */ 1397 }; 1398 size_t noffset; 1399 1400 if (!elems_len) 1401 return offset; 1402 1403 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1404 noffset = ieee80211_ie_split(elems, elems_len, 1405 before_he, ARRAY_SIZE(before_he), 1406 offset); 1407 skb_put_data(skb, elems + offset, noffset - offset); 1408 1409 return noffset; 1410 } 1411 1412 #define PRESENT_ELEMS_MAX 8 1413 #define PRESENT_ELEM_EXT_OFFS 0x100 1414 1415 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1416 struct sk_buff *skb, u16 capab, 1417 const struct element *ext_capa, 1418 const u16 *present_elems); 1419 1420 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1421 struct sk_buff *skb, u16 *capab, 1422 const struct element *ext_capa, 1423 const u8 *extra_elems, 1424 size_t extra_elems_len, 1425 unsigned int link_id, 1426 struct ieee80211_link_data *link, 1427 u16 *present_elems) 1428 { 1429 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1430 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1431 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1432 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1433 struct ieee80211_channel *chan = cbss->channel; 1434 const struct ieee80211_sband_iftype_data *iftd; 1435 struct ieee80211_local *local = sdata->local; 1436 struct ieee80211_supported_band *sband; 1437 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1438 struct ieee80211_chanctx_conf *chanctx_conf; 1439 enum ieee80211_smps_mode smps_mode; 1440 u16 orig_capab = *capab; 1441 size_t offset = 0; 1442 int present_elems_len = 0; 1443 u8 *pos; 1444 int i; 1445 1446 #define ADD_PRESENT_ELEM(id) do { \ 1447 /* need a last for termination - we use 0 == SSID */ \ 1448 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1449 present_elems[present_elems_len++] = (id); \ 1450 } while (0) 1451 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1452 1453 if (link) 1454 smps_mode = link->smps_mode; 1455 else if (sdata->u.mgd.powersave) 1456 smps_mode = IEEE80211_SMPS_DYNAMIC; 1457 else 1458 smps_mode = IEEE80211_SMPS_OFF; 1459 1460 if (link) { 1461 /* 1462 * 5/10 MHz scenarios are only viable without MLO, in which 1463 * case this pointer should be used ... All of this is a bit 1464 * unclear though, not sure this even works at all. 1465 */ 1466 rcu_read_lock(); 1467 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1468 if (chanctx_conf) 1469 width = chanctx_conf->def.width; 1470 rcu_read_unlock(); 1471 } 1472 1473 sband = local->hw.wiphy->bands[chan->band]; 1474 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1475 1476 if (sband->band == NL80211_BAND_2GHZ) { 1477 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1478 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1479 } 1480 1481 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1482 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1483 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1484 1485 if (sband->band != NL80211_BAND_S1GHZ) 1486 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1487 1488 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1489 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1490 struct cfg80211_chan_def chandef = { 1491 .width = width, 1492 .chan = chan, 1493 }; 1494 1495 pos = skb_put(skb, 4); 1496 *pos++ = WLAN_EID_PWR_CAPABILITY; 1497 *pos++ = 2; 1498 *pos++ = 0; /* min tx power */ 1499 /* max tx power */ 1500 *pos++ = ieee80211_chandef_max_power(&chandef); 1501 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1502 } 1503 1504 /* 1505 * Per spec, we shouldn't include the list of channels if we advertise 1506 * support for extended channel switching, but we've always done that; 1507 * (for now?) apply this restriction only on the (new) 6 GHz band. 1508 */ 1509 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1510 (sband->band != NL80211_BAND_6GHZ || 1511 !ext_capa || ext_capa->datalen < 1 || 1512 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1513 /* TODO: get this in reg domain format */ 1514 pos = skb_put(skb, 2 * sband->n_channels + 2); 1515 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1516 *pos++ = 2 * sband->n_channels; 1517 for (i = 0; i < sband->n_channels; i++) { 1518 int cf = sband->channels[i].center_freq; 1519 1520 *pos++ = ieee80211_frequency_to_channel(cf); 1521 *pos++ = 1; /* one channel in the subband*/ 1522 } 1523 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1524 } 1525 1526 /* if present, add any custom IEs that go before HT */ 1527 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1528 extra_elems_len, 1529 offset); 1530 1531 if (sband->band != NL80211_BAND_6GHZ && 1532 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1533 ieee80211_add_ht_ie(sdata, skb, 1534 assoc_data->link[link_id].ap_ht_param, 1535 sband, chan, smps_mode, 1536 &assoc_data->link[link_id].conn); 1537 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1538 } 1539 1540 /* if present, add any custom IEs that go before VHT */ 1541 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1542 extra_elems_len, 1543 offset); 1544 1545 if (sband->band != NL80211_BAND_6GHZ && 1546 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1547 sband->vht_cap.vht_supported) { 1548 bool mu_mimo_owner = 1549 ieee80211_add_vht_ie(sdata, skb, sband, 1550 &assoc_data->link[link_id].ap_vht_cap, 1551 &assoc_data->link[link_id].conn); 1552 1553 if (link) 1554 link->conf->mu_mimo_owner = mu_mimo_owner; 1555 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1556 } 1557 1558 /* if present, add any custom IEs that go before HE */ 1559 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1560 extra_elems_len, 1561 offset); 1562 1563 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1564 ieee80211_put_he_cap(skb, sdata, sband, 1565 &assoc_data->link[link_id].conn); 1566 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1567 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1568 } 1569 1570 /* 1571 * careful - need to know about all the present elems before 1572 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1573 * we're going to put it after the ML element 1574 */ 1575 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1576 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1577 1578 if (link_id == assoc_data->assoc_link_id) 1579 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1580 present_elems); 1581 1582 /* crash if somebody gets it wrong */ 1583 present_elems = NULL; 1584 1585 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1586 ieee80211_put_eht_cap(skb, sdata, sband, 1587 &assoc_data->link[link_id].conn); 1588 1589 if (sband->band == NL80211_BAND_S1GHZ) { 1590 ieee80211_add_aid_request_ie(sdata, skb); 1591 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1592 } 1593 1594 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1595 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1596 1597 return offset; 1598 } 1599 1600 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1601 const u16 *outer, 1602 const u16 *inner) 1603 { 1604 unsigned int skb_len = skb->len; 1605 bool at_extension = false; 1606 bool added = false; 1607 int i, j; 1608 u8 *len, *list_len = NULL; 1609 1610 skb_put_u8(skb, WLAN_EID_EXTENSION); 1611 len = skb_put(skb, 1); 1612 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1613 1614 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1615 u16 elem = outer[i]; 1616 bool have_inner = false; 1617 1618 /* should at least be sorted in the sense of normal -> ext */ 1619 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1620 1621 /* switch to extension list */ 1622 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1623 at_extension = true; 1624 if (!list_len) 1625 skb_put_u8(skb, 0); 1626 list_len = NULL; 1627 } 1628 1629 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1630 if (elem == inner[j]) { 1631 have_inner = true; 1632 break; 1633 } 1634 } 1635 1636 if (have_inner) 1637 continue; 1638 1639 if (!list_len) { 1640 list_len = skb_put(skb, 1); 1641 *list_len = 0; 1642 } 1643 *list_len += 1; 1644 skb_put_u8(skb, (u8)elem); 1645 added = true; 1646 } 1647 1648 /* if we added a list but no extension list, make a zero-len one */ 1649 if (added && (!at_extension || !list_len)) 1650 skb_put_u8(skb, 0); 1651 1652 /* if nothing added remove extension element completely */ 1653 if (!added) 1654 skb_trim(skb, skb_len); 1655 else 1656 *len = skb->len - skb_len - 2; 1657 } 1658 1659 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1660 struct sk_buff *skb, u16 capab, 1661 const struct element *ext_capa, 1662 const u16 *outer_present_elems) 1663 { 1664 struct ieee80211_local *local = sdata->local; 1665 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1666 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1667 struct ieee80211_multi_link_elem *ml_elem; 1668 struct ieee80211_mle_basic_common_info *common; 1669 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1670 __le16 eml_capa = 0, mld_capa_ops = 0; 1671 unsigned int link_id; 1672 u8 *ml_elem_len; 1673 void *capab_pos; 1674 1675 if (!ieee80211_vif_is_mld(&sdata->vif)) 1676 return; 1677 1678 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1679 ieee80211_vif_type_p2p(&sdata->vif)); 1680 if (ift_ext_capa) { 1681 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1682 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1683 } 1684 1685 skb_put_u8(skb, WLAN_EID_EXTENSION); 1686 ml_elem_len = skb_put(skb, 1); 1687 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1688 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1689 ml_elem->control = 1690 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1691 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1692 common = skb_put(skb, sizeof(*common)); 1693 common->len = sizeof(*common) + 1694 2; /* MLD capa/ops */ 1695 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1696 1697 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1698 if (eml_capa & 1699 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1700 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1701 common->len += 2; /* EML capabilities */ 1702 ml_elem->control |= 1703 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1704 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1705 } 1706 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1707 1708 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1709 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1710 const u8 *extra_elems; 1711 size_t extra_elems_len; 1712 size_t extra_used; 1713 u8 *subelem_len = NULL; 1714 __le16 ctrl; 1715 1716 if (!assoc_data->link[link_id].bss || 1717 link_id == assoc_data->assoc_link_id) 1718 continue; 1719 1720 extra_elems = assoc_data->link[link_id].elems; 1721 extra_elems_len = assoc_data->link[link_id].elems_len; 1722 1723 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1724 subelem_len = skb_put(skb, 1); 1725 1726 ctrl = cpu_to_le16(link_id | 1727 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1728 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1729 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1730 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1731 skb_put_data(skb, assoc_data->link[link_id].addr, 1732 ETH_ALEN); 1733 /* 1734 * Now add the contents of the (re)association request, 1735 * but the "listen interval" and "current AP address" 1736 * (if applicable) are skipped. So we only have 1737 * the capability field (remember the position and fill 1738 * later), followed by the elements added below by 1739 * calling ieee80211_assoc_link_elems(). 1740 */ 1741 capab_pos = skb_put(skb, 2); 1742 1743 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1744 ext_capa, 1745 extra_elems, 1746 extra_elems_len, 1747 link_id, NULL, 1748 link_present_elems); 1749 if (extra_elems) 1750 skb_put_data(skb, extra_elems + extra_used, 1751 extra_elems_len - extra_used); 1752 1753 put_unaligned_le16(capab, capab_pos); 1754 1755 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1756 link_present_elems); 1757 1758 ieee80211_fragment_element(skb, subelem_len, 1759 IEEE80211_MLE_SUBELEM_FRAGMENT); 1760 } 1761 1762 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1763 } 1764 1765 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1766 { 1767 struct ieee80211_local *local = sdata->local; 1768 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1769 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1770 struct ieee80211_link_data *link; 1771 struct sk_buff *skb; 1772 struct ieee80211_mgmt *mgmt; 1773 u8 *pos, qos_info, *ie_start; 1774 size_t offset, noffset; 1775 u16 capab = 0, link_capab; 1776 __le16 listen_int; 1777 struct element *ext_capa = NULL; 1778 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1779 struct ieee80211_prep_tx_info info = {}; 1780 unsigned int link_id, n_links = 0; 1781 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1782 void *capab_pos; 1783 size_t size; 1784 int ret; 1785 1786 /* we know it's writable, cast away the const */ 1787 if (assoc_data->ie_len) 1788 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1789 assoc_data->ie, 1790 assoc_data->ie_len); 1791 1792 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1793 1794 size = local->hw.extra_tx_headroom + 1795 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1796 2 + assoc_data->ssid_len + /* SSID */ 1797 assoc_data->ie_len + /* extra IEs */ 1798 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1799 9; /* WMM */ 1800 1801 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1802 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1803 const struct ieee80211_sband_iftype_data *iftd; 1804 struct ieee80211_supported_band *sband; 1805 1806 if (!cbss) 1807 continue; 1808 1809 sband = local->hw.wiphy->bands[cbss->channel->band]; 1810 1811 n_links++; 1812 /* add STA profile elements length */ 1813 size += assoc_data->link[link_id].elems_len; 1814 /* and supported rates length */ 1815 size += 4 + sband->n_bitrates; 1816 /* supported channels */ 1817 size += 2 + 2 * sband->n_channels; 1818 1819 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1820 if (iftd) 1821 size += iftd->vendor_elems.len; 1822 1823 /* power capability */ 1824 size += 4; 1825 1826 /* HT, VHT, HE, EHT */ 1827 size += 2 + sizeof(struct ieee80211_ht_cap); 1828 size += 2 + sizeof(struct ieee80211_vht_cap); 1829 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1830 sizeof(struct ieee80211_he_mcs_nss_supp) + 1831 IEEE80211_HE_PPE_THRES_MAX_LEN; 1832 1833 if (sband->band == NL80211_BAND_6GHZ) 1834 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1835 1836 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1837 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1838 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1839 1840 /* non-inheritance element */ 1841 size += 2 + 2 + PRESENT_ELEMS_MAX; 1842 1843 /* should be the same across all BSSes */ 1844 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1845 capab |= WLAN_CAPABILITY_PRIVACY; 1846 } 1847 1848 if (ieee80211_vif_is_mld(&sdata->vif)) { 1849 /* consider the multi-link element with STA profile */ 1850 size += sizeof(struct ieee80211_multi_link_elem); 1851 /* max common info field in basic multi-link element */ 1852 size += sizeof(struct ieee80211_mle_basic_common_info) + 1853 2 + /* capa & op */ 1854 2; /* EML capa */ 1855 1856 /* 1857 * The capability elements were already considered above; 1858 * note this over-estimates a bit because there's no 1859 * STA profile for the assoc link. 1860 */ 1861 size += (n_links - 1) * 1862 (1 + 1 + /* subelement ID/length */ 1863 2 + /* STA control */ 1864 1 + ETH_ALEN + 2 /* STA Info field */); 1865 } 1866 1867 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1868 if (WARN_ON(!link)) 1869 return -EINVAL; 1870 1871 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1872 return -EINVAL; 1873 1874 skb = alloc_skb(size, GFP_KERNEL); 1875 if (!skb) 1876 return -ENOMEM; 1877 1878 skb_reserve(skb, local->hw.extra_tx_headroom); 1879 1880 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1881 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1882 1883 /* Set MBSSID support for HE AP if needed */ 1884 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1885 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 1886 ext_capa && ext_capa->datalen >= 3) 1887 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1888 1889 mgmt = skb_put_zero(skb, 24); 1890 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1891 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1892 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1893 1894 listen_int = cpu_to_le16(assoc_data->s1g ? 1895 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1896 local->hw.conf.listen_interval); 1897 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1898 skb_put(skb, 10); 1899 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1900 IEEE80211_STYPE_REASSOC_REQ); 1901 capab_pos = &mgmt->u.reassoc_req.capab_info; 1902 mgmt->u.reassoc_req.listen_interval = listen_int; 1903 memcpy(mgmt->u.reassoc_req.current_ap, 1904 assoc_data->prev_ap_addr, ETH_ALEN); 1905 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1906 } else { 1907 skb_put(skb, 4); 1908 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1909 IEEE80211_STYPE_ASSOC_REQ); 1910 capab_pos = &mgmt->u.assoc_req.capab_info; 1911 mgmt->u.assoc_req.listen_interval = listen_int; 1912 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1913 } 1914 1915 /* SSID */ 1916 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1917 ie_start = pos; 1918 *pos++ = WLAN_EID_SSID; 1919 *pos++ = assoc_data->ssid_len; 1920 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1921 1922 /* 1923 * This bit is technically reserved, so it shouldn't matter for either 1924 * the AP or us, but it also means we shouldn't set it. However, we've 1925 * always set it in the past, and apparently some EHT APs check that 1926 * we don't set it. To avoid interoperability issues with old APs that 1927 * for some reason check it and want it to be set, set the bit for all 1928 * pre-EHT connections as we used to do. 1929 */ 1930 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT) 1931 capab |= WLAN_CAPABILITY_ESS; 1932 1933 /* add the elements for the assoc (main) link */ 1934 link_capab = capab; 1935 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1936 ext_capa, 1937 assoc_data->ie, 1938 assoc_data->ie_len, 1939 assoc_data->assoc_link_id, link, 1940 present_elems); 1941 put_unaligned_le16(link_capab, capab_pos); 1942 1943 /* if present, add any custom non-vendor IEs */ 1944 if (assoc_data->ie_len) { 1945 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1946 assoc_data->ie_len, 1947 offset); 1948 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1949 offset = noffset; 1950 } 1951 1952 if (assoc_data->wmm) { 1953 if (assoc_data->uapsd) { 1954 qos_info = ifmgd->uapsd_queues; 1955 qos_info |= (ifmgd->uapsd_max_sp_len << 1956 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1957 } else { 1958 qos_info = 0; 1959 } 1960 1961 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1962 } 1963 1964 /* add any remaining custom (i.e. vendor specific here) IEs */ 1965 if (assoc_data->ie_len) { 1966 noffset = assoc_data->ie_len; 1967 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1968 } 1969 1970 if (assoc_data->fils_kek_len) { 1971 ret = fils_encrypt_assoc_req(skb, assoc_data); 1972 if (ret < 0) { 1973 dev_kfree_skb(skb); 1974 return ret; 1975 } 1976 } 1977 1978 pos = skb_tail_pointer(skb); 1979 kfree(ifmgd->assoc_req_ies); 1980 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1981 if (!ifmgd->assoc_req_ies) { 1982 dev_kfree_skb(skb); 1983 return -ENOMEM; 1984 } 1985 1986 ifmgd->assoc_req_ies_len = pos - ie_start; 1987 1988 info.link_id = assoc_data->assoc_link_id; 1989 drv_mgd_prepare_tx(local, sdata, &info); 1990 1991 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1992 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1993 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1994 IEEE80211_TX_INTFL_MLME_CONN_TX; 1995 ieee80211_tx_skb(sdata, skb); 1996 1997 return 0; 1998 } 1999 2000 void ieee80211_send_pspoll(struct ieee80211_local *local, 2001 struct ieee80211_sub_if_data *sdata) 2002 { 2003 struct ieee80211_pspoll *pspoll; 2004 struct sk_buff *skb; 2005 2006 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2007 if (!skb) 2008 return; 2009 2010 pspoll = (struct ieee80211_pspoll *) skb->data; 2011 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2012 2013 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2014 ieee80211_tx_skb(sdata, skb); 2015 } 2016 2017 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2018 struct ieee80211_sub_if_data *sdata, 2019 bool powersave) 2020 { 2021 struct sk_buff *skb; 2022 struct ieee80211_hdr_3addr *nullfunc; 2023 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2024 2025 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2026 !ieee80211_hw_check(&local->hw, 2027 DOESNT_SUPPORT_QOS_NDP)); 2028 if (!skb) 2029 return; 2030 2031 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2032 if (powersave) 2033 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2034 2035 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2036 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2037 2038 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2039 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2040 2041 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2042 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2043 2044 ieee80211_tx_skb(sdata, skb); 2045 } 2046 2047 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2048 struct ieee80211_sub_if_data *sdata) 2049 { 2050 struct sk_buff *skb; 2051 struct ieee80211_hdr *nullfunc; 2052 __le16 fc; 2053 2054 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2055 return; 2056 2057 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2058 if (!skb) 2059 return; 2060 2061 skb_reserve(skb, local->hw.extra_tx_headroom); 2062 2063 nullfunc = skb_put_zero(skb, 30); 2064 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2065 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2066 nullfunc->frame_control = fc; 2067 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2068 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2069 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2070 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2071 2072 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2073 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2074 ieee80211_tx_skb(sdata, skb); 2075 } 2076 2077 /* spectrum management related things */ 2078 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2079 struct wiphy_work *work) 2080 { 2081 struct ieee80211_link_data *link = 2082 container_of(work, struct ieee80211_link_data, 2083 u.mgd.csa.switch_work.work); 2084 struct ieee80211_sub_if_data *sdata = link->sdata; 2085 struct ieee80211_local *local = sdata->local; 2086 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2087 int ret; 2088 2089 if (!ieee80211_sdata_running(sdata)) 2090 return; 2091 2092 lockdep_assert_wiphy(local->hw.wiphy); 2093 2094 if (!ifmgd->associated) 2095 return; 2096 2097 if (!link->conf->csa_active) 2098 return; 2099 2100 /* 2101 * If the link isn't active (now), we cannot wait for beacons, won't 2102 * have a reserved chanctx, etc. Just switch over the chandef and 2103 * update cfg80211 directly. 2104 */ 2105 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2106 link->conf->chanreq = link->csa.chanreq; 2107 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2108 link->link_id); 2109 return; 2110 } 2111 2112 /* 2113 * using reservation isn't immediate as it may be deferred until later 2114 * with multi-vif. once reservation is complete it will re-schedule the 2115 * work with no reserved_chanctx so verify chandef to check if it 2116 * completed successfully 2117 */ 2118 2119 if (link->reserved_chanctx) { 2120 /* 2121 * with multi-vif csa driver may call ieee80211_csa_finish() 2122 * many times while waiting for other interfaces to use their 2123 * reservations 2124 */ 2125 if (link->reserved_ready) 2126 return; 2127 2128 ret = ieee80211_link_use_reserved_context(link); 2129 if (ret) { 2130 link_info(link, 2131 "failed to use reserved channel context, disconnecting (err=%d)\n", 2132 ret); 2133 wiphy_work_queue(sdata->local->hw.wiphy, 2134 &ifmgd->csa_connection_drop_work); 2135 } 2136 return; 2137 } 2138 2139 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2140 &link->csa.chanreq)) { 2141 link_info(link, 2142 "failed to finalize channel switch, disconnecting\n"); 2143 wiphy_work_queue(sdata->local->hw.wiphy, 2144 &ifmgd->csa_connection_drop_work); 2145 return; 2146 } 2147 2148 link->u.mgd.csa.waiting_bcn = true; 2149 2150 /* apply new TPE restrictions immediately on the new channel */ 2151 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2152 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2153 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2154 &link->u.mgd.csa.ap_chandef, 2155 &link->conf->chanreq.oper); 2156 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2157 sizeof(link->u.mgd.csa.tpe))) { 2158 link->conf->tpe = link->u.mgd.csa.tpe; 2159 ieee80211_link_info_change_notify(sdata, link, 2160 BSS_CHANGED_TPE); 2161 } 2162 } 2163 2164 ieee80211_sta_reset_beacon_monitor(sdata); 2165 ieee80211_sta_reset_conn_monitor(sdata); 2166 } 2167 2168 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2169 { 2170 struct ieee80211_sub_if_data *sdata = link->sdata; 2171 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2172 int ret; 2173 2174 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2175 2176 WARN_ON(!link->conf->csa_active); 2177 2178 ieee80211_vif_unblock_queues_csa(sdata); 2179 2180 link->conf->csa_active = false; 2181 link->u.mgd.csa.blocked_tx = false; 2182 link->u.mgd.csa.waiting_bcn = false; 2183 2184 ret = drv_post_channel_switch(link); 2185 if (ret) { 2186 link_info(link, 2187 "driver post channel switch failed, disconnecting\n"); 2188 wiphy_work_queue(sdata->local->hw.wiphy, 2189 &ifmgd->csa_connection_drop_work); 2190 return; 2191 } 2192 2193 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2194 link->link_id); 2195 } 2196 2197 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2198 unsigned int link_id) 2199 { 2200 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2201 2202 trace_api_chswitch_done(sdata, success, link_id); 2203 2204 rcu_read_lock(); 2205 2206 if (!success) { 2207 sdata_info(sdata, 2208 "driver channel switch failed (link %d), disconnecting\n", 2209 link_id); 2210 wiphy_work_queue(sdata->local->hw.wiphy, 2211 &sdata->u.mgd.csa_connection_drop_work); 2212 } else { 2213 struct ieee80211_link_data *link = 2214 rcu_dereference(sdata->link[link_id]); 2215 2216 if (WARN_ON(!link)) { 2217 rcu_read_unlock(); 2218 return; 2219 } 2220 2221 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2222 &link->u.mgd.csa.switch_work, 0); 2223 } 2224 2225 rcu_read_unlock(); 2226 } 2227 EXPORT_SYMBOL(ieee80211_chswitch_done); 2228 2229 static void 2230 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2231 { 2232 struct ieee80211_sub_if_data *sdata = link->sdata; 2233 struct ieee80211_local *local = sdata->local; 2234 2235 lockdep_assert_wiphy(local->hw.wiphy); 2236 2237 if (!local->ops->abort_channel_switch) 2238 return; 2239 2240 ieee80211_link_unreserve_chanctx(link); 2241 2242 ieee80211_vif_unblock_queues_csa(sdata); 2243 2244 link->conf->csa_active = false; 2245 link->u.mgd.csa.blocked_tx = false; 2246 2247 drv_abort_channel_switch(link); 2248 } 2249 2250 struct sta_csa_rnr_iter_data { 2251 struct ieee80211_link_data *link; 2252 struct ieee80211_channel *chan; 2253 u8 mld_id; 2254 }; 2255 2256 static enum cfg80211_rnr_iter_ret 2257 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2258 const struct ieee80211_neighbor_ap_info *info, 2259 const u8 *tbtt_info, u8 tbtt_info_len) 2260 { 2261 struct sta_csa_rnr_iter_data *data = _data; 2262 struct ieee80211_link_data *link = data->link; 2263 struct ieee80211_sub_if_data *sdata = link->sdata; 2264 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2265 const struct ieee80211_tbtt_info_ge_11 *ti; 2266 enum nl80211_band band; 2267 unsigned int center_freq; 2268 int link_id; 2269 2270 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2271 return RNR_ITER_CONTINUE; 2272 2273 if (tbtt_info_len < sizeof(*ti)) 2274 return RNR_ITER_CONTINUE; 2275 2276 ti = (const void *)tbtt_info; 2277 2278 if (ti->mld_params.mld_id != data->mld_id) 2279 return RNR_ITER_CONTINUE; 2280 2281 link_id = le16_get_bits(ti->mld_params.params, 2282 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2283 if (link_id != data->link->link_id) 2284 return RNR_ITER_CONTINUE; 2285 2286 /* we found the entry for our link! */ 2287 2288 /* this AP is confused, it had this right before ... just disconnect */ 2289 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2290 link_info(link, 2291 "AP now has invalid operating class in RNR, disconnect\n"); 2292 wiphy_work_queue(sdata->local->hw.wiphy, 2293 &ifmgd->csa_connection_drop_work); 2294 return RNR_ITER_BREAK; 2295 } 2296 2297 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2298 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2299 2300 return RNR_ITER_BREAK; 2301 } 2302 2303 static void 2304 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2305 struct ieee802_11_elems *elems) 2306 { 2307 struct ieee80211_sub_if_data *sdata = link->sdata; 2308 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2309 struct sta_csa_rnr_iter_data data = { 2310 .link = link, 2311 }; 2312 2313 /* 2314 * If we get here, we see a beacon from another link without 2315 * CSA still being reported for it, so now we have to check 2316 * if the CSA was aborted or completed. This may not even be 2317 * perfectly possible if the CSA was only done for changing 2318 * the puncturing, but in that case if the link in inactive 2319 * we don't really care, and if it's an active link (or when 2320 * it's activated later) we'll get a beacon and adjust. 2321 */ 2322 2323 if (WARN_ON(!elems->ml_basic)) 2324 return; 2325 2326 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2327 2328 /* 2329 * So in order to do this, iterate the RNR element(s) and see 2330 * what channel is reported now. 2331 */ 2332 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2333 ieee80211_sta_csa_rnr_iter, &data); 2334 2335 if (!data.chan) { 2336 link_info(link, 2337 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2338 wiphy_work_queue(sdata->local->hw.wiphy, 2339 &ifmgd->csa_connection_drop_work); 2340 return; 2341 } 2342 2343 /* 2344 * If it doesn't match the CSA, then assume it aborted. This 2345 * may erroneously detect that it was _not_ aborted when it 2346 * was in fact aborted, but only changed the bandwidth or the 2347 * puncturing configuration, but we don't have enough data to 2348 * detect that. 2349 */ 2350 if (data.chan != link->csa.chanreq.oper.chan) 2351 ieee80211_sta_abort_chanswitch(link); 2352 } 2353 2354 enum ieee80211_csa_source { 2355 IEEE80211_CSA_SOURCE_BEACON, 2356 IEEE80211_CSA_SOURCE_OTHER_LINK, 2357 IEEE80211_CSA_SOURCE_PROT_ACTION, 2358 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2359 }; 2360 2361 static void 2362 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2363 u64 timestamp, u32 device_timestamp, 2364 struct ieee802_11_elems *full_elems, 2365 struct ieee802_11_elems *csa_elems, 2366 enum ieee80211_csa_source source) 2367 { 2368 struct ieee80211_sub_if_data *sdata = link->sdata; 2369 struct ieee80211_local *local = sdata->local; 2370 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2371 struct ieee80211_chanctx *chanctx = NULL; 2372 struct ieee80211_chanctx_conf *conf; 2373 struct ieee80211_csa_ie csa_ie = {}; 2374 struct ieee80211_channel_switch ch_switch = { 2375 .link_id = link->link_id, 2376 .timestamp = timestamp, 2377 .device_timestamp = device_timestamp, 2378 }; 2379 unsigned long now; 2380 int res; 2381 2382 lockdep_assert_wiphy(local->hw.wiphy); 2383 2384 if (csa_elems) { 2385 struct cfg80211_bss *cbss = link->conf->bss; 2386 enum nl80211_band current_band; 2387 struct ieee80211_bss *bss; 2388 2389 if (WARN_ON(!cbss)) 2390 return; 2391 2392 current_band = cbss->channel->band; 2393 bss = (void *)cbss->priv; 2394 2395 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2396 current_band, 2397 bss->vht_cap_info, 2398 &link->u.mgd.conn, 2399 link->u.mgd.bssid, 2400 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2401 &csa_ie); 2402 if (res == 0) { 2403 ch_switch.block_tx = csa_ie.mode; 2404 ch_switch.chandef = csa_ie.chanreq.oper; 2405 ch_switch.count = csa_ie.count; 2406 ch_switch.delay = csa_ie.max_switch_time; 2407 } 2408 2409 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2410 } else { 2411 /* 2412 * If there was no per-STA profile for this link, we 2413 * get called with csa_elems == NULL. This of course means 2414 * there are no CSA elements, so set res=1 indicating 2415 * no more CSA. 2416 */ 2417 res = 1; 2418 } 2419 2420 if (res < 0) { 2421 /* ignore this case, not a protected frame */ 2422 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2423 return; 2424 goto drop_connection; 2425 } 2426 2427 if (link->conf->csa_active) { 2428 switch (source) { 2429 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2430 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2431 /* already processing - disregard action frames */ 2432 return; 2433 case IEEE80211_CSA_SOURCE_BEACON: 2434 if (link->u.mgd.csa.waiting_bcn) { 2435 ieee80211_chswitch_post_beacon(link); 2436 /* 2437 * If the CSA is still present after the switch 2438 * we need to consider it as a new CSA (possibly 2439 * to self). This happens by not returning here 2440 * so we'll get to the check below. 2441 */ 2442 } else if (res) { 2443 ieee80211_sta_abort_chanswitch(link); 2444 return; 2445 } else { 2446 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2447 return; 2448 } 2449 break; 2450 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2451 /* active link: we want to see the beacon to continue */ 2452 if (ieee80211_vif_link_active(&sdata->vif, 2453 link->link_id)) 2454 return; 2455 2456 /* switch work ran, so just complete the process */ 2457 if (link->u.mgd.csa.waiting_bcn) { 2458 ieee80211_chswitch_post_beacon(link); 2459 /* 2460 * If the CSA is still present after the switch 2461 * we need to consider it as a new CSA (possibly 2462 * to self). This happens by not returning here 2463 * so we'll get to the check below. 2464 */ 2465 break; 2466 } 2467 2468 /* link still has CSA but we already know, do nothing */ 2469 if (!res) 2470 return; 2471 2472 /* check in the RNR if the CSA aborted */ 2473 ieee80211_sta_other_link_csa_disappeared(link, 2474 full_elems); 2475 return; 2476 } 2477 } 2478 2479 /* no active CSA nor a new one */ 2480 if (res) { 2481 /* 2482 * However, we may have stopped queues when receiving a public 2483 * action frame that couldn't be protected, if it had the quiet 2484 * bit set. This is a trade-off, we want to be quiet as soon as 2485 * possible, but also don't trust the public action frame much, 2486 * as it can't be protected. 2487 */ 2488 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2489 link->u.mgd.csa.blocked_tx = false; 2490 ieee80211_vif_unblock_queues_csa(sdata); 2491 } 2492 return; 2493 } 2494 2495 /* 2496 * We don't really trust public action frames, but block queues (go to 2497 * quiet mode) for them anyway, we should get a beacon soon to either 2498 * know what the CSA really is, or figure out the public action frame 2499 * was actually an attack. 2500 */ 2501 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2502 if (csa_ie.mode) { 2503 link->u.mgd.csa.blocked_tx = true; 2504 ieee80211_vif_block_queues_csa(sdata); 2505 } 2506 return; 2507 } 2508 2509 if (link->conf->chanreq.oper.chan->band != 2510 csa_ie.chanreq.oper.chan->band) { 2511 link_info(link, 2512 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2513 link->u.mgd.bssid, 2514 csa_ie.chanreq.oper.chan->center_freq, 2515 csa_ie.chanreq.oper.width, 2516 csa_ie.chanreq.oper.center_freq1, 2517 csa_ie.chanreq.oper.center_freq2); 2518 goto drop_connection; 2519 } 2520 2521 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2522 IEEE80211_CHAN_DISABLED)) { 2523 link_info(link, 2524 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2525 link->u.mgd.bssid, 2526 csa_ie.chanreq.oper.chan->center_freq, 2527 csa_ie.chanreq.oper.chan->freq_offset, 2528 csa_ie.chanreq.oper.width, 2529 csa_ie.chanreq.oper.center_freq1, 2530 csa_ie.chanreq.oper.freq1_offset, 2531 csa_ie.chanreq.oper.center_freq2); 2532 goto drop_connection; 2533 } 2534 2535 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2536 &link->conf->chanreq.oper) && 2537 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2538 if (link->u.mgd.csa.ignored_same_chan) 2539 return; 2540 link_info(link, 2541 "AP %pM tries to chanswitch to same channel, ignore\n", 2542 link->u.mgd.bssid); 2543 link->u.mgd.csa.ignored_same_chan = true; 2544 return; 2545 } 2546 2547 /* 2548 * Drop all TDLS peers on the affected link - either we disconnect or 2549 * move to a different channel from this point on. There's no telling 2550 * what our peer will do. 2551 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2552 * have an incompatible wider chandef. 2553 */ 2554 ieee80211_teardown_tdls_peers(link); 2555 2556 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2557 lockdep_is_held(&local->hw.wiphy->mtx)); 2558 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2559 link_info(link, 2560 "no channel context assigned to vif?, disconnecting\n"); 2561 goto drop_connection; 2562 } 2563 2564 if (conf) 2565 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2566 2567 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2568 link_info(link, 2569 "driver doesn't support chan-switch with channel contexts\n"); 2570 goto drop_connection; 2571 } 2572 2573 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2574 link_info(link, 2575 "preparing for channel switch failed, disconnecting\n"); 2576 goto drop_connection; 2577 } 2578 2579 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2580 2581 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2582 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2583 &csa_ie.chanreq.ap); 2584 2585 if (chanctx) { 2586 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2587 chanctx->mode, false); 2588 if (res) { 2589 link_info(link, 2590 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2591 res); 2592 goto drop_connection; 2593 } 2594 } 2595 2596 link->conf->csa_active = true; 2597 link->u.mgd.csa.ignored_same_chan = false; 2598 link->u.mgd.beacon_crc_valid = false; 2599 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2600 2601 if (csa_ie.mode) 2602 ieee80211_vif_block_queues_csa(sdata); 2603 2604 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2605 link->link_id, csa_ie.count, 2606 csa_ie.mode); 2607 2608 /* we may have to handle timeout for deactivated link in software */ 2609 now = jiffies; 2610 link->u.mgd.csa.time = now + 2611 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2612 link->conf->beacon_int); 2613 2614 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 2615 local->ops->channel_switch) { 2616 /* 2617 * Use driver's channel switch callback, the driver will 2618 * later call ieee80211_chswitch_done(). It may deactivate 2619 * the link as well, we handle that elsewhere and queue 2620 * the csa.switch_work for the calculated time then. 2621 */ 2622 drv_channel_switch(local, sdata, &ch_switch); 2623 return; 2624 } 2625 2626 /* channel switch handled in software */ 2627 wiphy_delayed_work_queue(local->hw.wiphy, 2628 &link->u.mgd.csa.switch_work, 2629 link->u.mgd.csa.time - now); 2630 return; 2631 drop_connection: 2632 /* 2633 * This is just so that the disconnect flow will know that 2634 * we were trying to switch channel and failed. In case the 2635 * mode is 1 (we are not allowed to Tx), we will know not to 2636 * send a deauthentication frame. Those two fields will be 2637 * reset when the disconnection worker runs. 2638 */ 2639 link->conf->csa_active = true; 2640 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2641 sdata->csa_blocked_queues = 2642 csa_ie.mode && !ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA); 2643 2644 wiphy_work_queue(sdata->local->hw.wiphy, 2645 &ifmgd->csa_connection_drop_work); 2646 } 2647 2648 struct sta_bss_param_ch_cnt_data { 2649 struct ieee80211_sub_if_data *sdata; 2650 u8 reporting_link_id; 2651 u8 mld_id; 2652 }; 2653 2654 static enum cfg80211_rnr_iter_ret 2655 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 2656 const struct ieee80211_neighbor_ap_info *info, 2657 const u8 *tbtt_info, u8 tbtt_info_len) 2658 { 2659 struct sta_bss_param_ch_cnt_data *data = _data; 2660 struct ieee80211_sub_if_data *sdata = data->sdata; 2661 const struct ieee80211_tbtt_info_ge_11 *ti; 2662 u8 bss_param_ch_cnt; 2663 int link_id; 2664 2665 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2666 return RNR_ITER_CONTINUE; 2667 2668 if (tbtt_info_len < sizeof(*ti)) 2669 return RNR_ITER_CONTINUE; 2670 2671 ti = (const void *)tbtt_info; 2672 2673 if (ti->mld_params.mld_id != data->mld_id) 2674 return RNR_ITER_CONTINUE; 2675 2676 link_id = le16_get_bits(ti->mld_params.params, 2677 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2678 bss_param_ch_cnt = 2679 le16_get_bits(ti->mld_params.params, 2680 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 2681 2682 if (bss_param_ch_cnt != 255 && 2683 link_id < ARRAY_SIZE(sdata->link)) { 2684 struct ieee80211_link_data *link = 2685 sdata_dereference(sdata->link[link_id], sdata); 2686 2687 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 2688 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 2689 link->conf->bss_param_ch_cnt_link_id = 2690 data->reporting_link_id; 2691 } 2692 } 2693 2694 return RNR_ITER_CONTINUE; 2695 } 2696 2697 static void 2698 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 2699 struct ieee80211_bss_conf *bss_conf, 2700 struct ieee802_11_elems *elems) 2701 { 2702 struct sta_bss_param_ch_cnt_data data = { 2703 .reporting_link_id = bss_conf->link_id, 2704 .sdata = sdata, 2705 }; 2706 int bss_param_ch_cnt; 2707 2708 if (!elems->ml_basic) 2709 return; 2710 2711 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2712 2713 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2714 ieee80211_sta_bss_param_ch_cnt_iter, &data); 2715 2716 bss_param_ch_cnt = 2717 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 2718 2719 /* 2720 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 2721 * didn't change to indicate that we got a beacon on our own 2722 * link. 2723 */ 2724 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 2725 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 2726 bss_conf->bss_param_ch_cnt_link_id = 2727 bss_conf->link_id; 2728 } 2729 } 2730 2731 static bool 2732 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 2733 const u8 *country_ie, u8 country_ie_len, 2734 const u8 *pwr_constr_elem, 2735 int *chan_pwr, int *pwr_reduction) 2736 { 2737 struct ieee80211_country_ie_triplet *triplet; 2738 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2739 int i, chan_increment; 2740 bool have_chan_pwr = false; 2741 2742 /* Invalid IE */ 2743 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2744 return false; 2745 2746 triplet = (void *)(country_ie + 3); 2747 country_ie_len -= 3; 2748 2749 switch (channel->band) { 2750 default: 2751 WARN_ON_ONCE(1); 2752 fallthrough; 2753 case NL80211_BAND_2GHZ: 2754 case NL80211_BAND_60GHZ: 2755 case NL80211_BAND_LC: 2756 chan_increment = 1; 2757 break; 2758 case NL80211_BAND_5GHZ: 2759 chan_increment = 4; 2760 break; 2761 case NL80211_BAND_6GHZ: 2762 /* 2763 * In the 6 GHz band, the "maximum transmit power level" 2764 * field in the triplets is reserved, and thus will be 2765 * zero and we shouldn't use it to control TX power. 2766 * The actual TX power will be given in the transmit 2767 * power envelope element instead. 2768 */ 2769 return false; 2770 } 2771 2772 /* find channel */ 2773 while (country_ie_len >= 3) { 2774 u8 first_channel = triplet->chans.first_channel; 2775 2776 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2777 goto next; 2778 2779 for (i = 0; i < triplet->chans.num_channels; i++) { 2780 if (first_channel + i * chan_increment == chan) { 2781 have_chan_pwr = true; 2782 *chan_pwr = triplet->chans.max_power; 2783 break; 2784 } 2785 } 2786 if (have_chan_pwr) 2787 break; 2788 2789 next: 2790 triplet++; 2791 country_ie_len -= 3; 2792 } 2793 2794 if (have_chan_pwr && pwr_constr_elem) 2795 *pwr_reduction = *pwr_constr_elem; 2796 else 2797 *pwr_reduction = 0; 2798 2799 return have_chan_pwr; 2800 } 2801 2802 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 2803 const u8 *cisco_dtpc_ie, 2804 int *pwr_level) 2805 { 2806 /* From practical testing, the first data byte of the DTPC element 2807 * seems to contain the requested dBm level, and the CLI on Cisco 2808 * APs clearly state the range is -127 to 127 dBm, which indicates 2809 * a signed byte, although it seemingly never actually goes negative. 2810 * The other byte seems to always be zero. 2811 */ 2812 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2813 } 2814 2815 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2816 struct ieee80211_channel *channel, 2817 struct ieee80211_mgmt *mgmt, 2818 const u8 *country_ie, u8 country_ie_len, 2819 const u8 *pwr_constr_ie, 2820 const u8 *cisco_dtpc_ie) 2821 { 2822 struct ieee80211_sub_if_data *sdata = link->sdata; 2823 bool has_80211h_pwr = false, has_cisco_pwr = false; 2824 int chan_pwr = 0, pwr_reduction_80211h = 0; 2825 int pwr_level_cisco, pwr_level_80211h; 2826 int new_ap_level; 2827 __le16 capab = mgmt->u.probe_resp.capab_info; 2828 2829 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2830 return 0; /* TODO */ 2831 2832 if (country_ie && 2833 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2834 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2835 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2836 channel, country_ie, country_ie_len, 2837 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2838 pwr_level_80211h = 2839 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2840 } 2841 2842 if (cisco_dtpc_ie) { 2843 ieee80211_find_cisco_dtpc( 2844 channel, cisco_dtpc_ie, &pwr_level_cisco); 2845 has_cisco_pwr = true; 2846 } 2847 2848 if (!has_80211h_pwr && !has_cisco_pwr) 2849 return 0; 2850 2851 /* If we have both 802.11h and Cisco DTPC, apply both limits 2852 * by picking the smallest of the two power levels advertised. 2853 */ 2854 if (has_80211h_pwr && 2855 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2856 new_ap_level = pwr_level_80211h; 2857 2858 if (link->ap_power_level == new_ap_level) 2859 return 0; 2860 2861 sdata_dbg(sdata, 2862 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2863 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2864 link->u.mgd.bssid); 2865 } else { /* has_cisco_pwr is always true here. */ 2866 new_ap_level = pwr_level_cisco; 2867 2868 if (link->ap_power_level == new_ap_level) 2869 return 0; 2870 2871 sdata_dbg(sdata, 2872 "Limiting TX power to %d dBm as advertised by %pM\n", 2873 pwr_level_cisco, link->u.mgd.bssid); 2874 } 2875 2876 link->ap_power_level = new_ap_level; 2877 if (__ieee80211_recalc_txpower(link)) 2878 return BSS_CHANGED_TXPOWER; 2879 return 0; 2880 } 2881 2882 /* powersave */ 2883 static void ieee80211_enable_ps(struct ieee80211_local *local, 2884 struct ieee80211_sub_if_data *sdata) 2885 { 2886 struct ieee80211_conf *conf = &local->hw.conf; 2887 2888 /* 2889 * If we are scanning right now then the parameters will 2890 * take effect when scan finishes. 2891 */ 2892 if (local->scanning) 2893 return; 2894 2895 if (conf->dynamic_ps_timeout > 0 && 2896 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2897 mod_timer(&local->dynamic_ps_timer, jiffies + 2898 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2899 } else { 2900 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2901 ieee80211_send_nullfunc(local, sdata, true); 2902 2903 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2904 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2905 return; 2906 2907 conf->flags |= IEEE80211_CONF_PS; 2908 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2909 } 2910 } 2911 2912 static void ieee80211_change_ps(struct ieee80211_local *local) 2913 { 2914 struct ieee80211_conf *conf = &local->hw.conf; 2915 2916 if (local->ps_sdata) { 2917 ieee80211_enable_ps(local, local->ps_sdata); 2918 } else if (conf->flags & IEEE80211_CONF_PS) { 2919 conf->flags &= ~IEEE80211_CONF_PS; 2920 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2921 del_timer_sync(&local->dynamic_ps_timer); 2922 wiphy_work_cancel(local->hw.wiphy, 2923 &local->dynamic_ps_enable_work); 2924 } 2925 } 2926 2927 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2928 { 2929 struct ieee80211_local *local = sdata->local; 2930 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2931 struct sta_info *sta = NULL; 2932 bool authorized = false; 2933 2934 if (!mgd->powersave) 2935 return false; 2936 2937 if (mgd->broken_ap) 2938 return false; 2939 2940 if (!mgd->associated) 2941 return false; 2942 2943 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2944 return false; 2945 2946 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2947 !sdata->deflink.u.mgd.have_beacon) 2948 return false; 2949 2950 rcu_read_lock(); 2951 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2952 if (sta) 2953 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2954 rcu_read_unlock(); 2955 2956 return authorized; 2957 } 2958 2959 /* need to hold RTNL or interface lock */ 2960 void ieee80211_recalc_ps(struct ieee80211_local *local) 2961 { 2962 struct ieee80211_sub_if_data *sdata, *found = NULL; 2963 int count = 0; 2964 int timeout; 2965 2966 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2967 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2968 local->ps_sdata = NULL; 2969 return; 2970 } 2971 2972 list_for_each_entry(sdata, &local->interfaces, list) { 2973 if (!ieee80211_sdata_running(sdata)) 2974 continue; 2975 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2976 /* If an AP vif is found, then disable PS 2977 * by setting the count to zero thereby setting 2978 * ps_sdata to NULL. 2979 */ 2980 count = 0; 2981 break; 2982 } 2983 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2984 continue; 2985 found = sdata; 2986 count++; 2987 } 2988 2989 if (count == 1 && ieee80211_powersave_allowed(found)) { 2990 u8 dtimper = found->deflink.u.mgd.dtim_period; 2991 2992 timeout = local->dynamic_ps_forced_timeout; 2993 if (timeout < 0) 2994 timeout = 100; 2995 local->hw.conf.dynamic_ps_timeout = timeout; 2996 2997 /* If the TIM IE is invalid, pretend the value is 1 */ 2998 if (!dtimper) 2999 dtimper = 1; 3000 3001 local->hw.conf.ps_dtim_period = dtimper; 3002 local->ps_sdata = found; 3003 } else { 3004 local->ps_sdata = NULL; 3005 } 3006 3007 ieee80211_change_ps(local); 3008 } 3009 3010 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3011 { 3012 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3013 3014 if (sdata->vif.cfg.ps != ps_allowed) { 3015 sdata->vif.cfg.ps = ps_allowed; 3016 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3017 } 3018 } 3019 3020 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3021 struct wiphy_work *work) 3022 { 3023 struct ieee80211_local *local = 3024 container_of(work, struct ieee80211_local, 3025 dynamic_ps_disable_work); 3026 3027 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3028 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3029 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3030 } 3031 3032 ieee80211_wake_queues_by_reason(&local->hw, 3033 IEEE80211_MAX_QUEUE_MAP, 3034 IEEE80211_QUEUE_STOP_REASON_PS, 3035 false); 3036 } 3037 3038 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3039 struct wiphy_work *work) 3040 { 3041 struct ieee80211_local *local = 3042 container_of(work, struct ieee80211_local, 3043 dynamic_ps_enable_work); 3044 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3045 struct ieee80211_if_managed *ifmgd; 3046 unsigned long flags; 3047 int q; 3048 3049 /* can only happen when PS was just disabled anyway */ 3050 if (!sdata) 3051 return; 3052 3053 ifmgd = &sdata->u.mgd; 3054 3055 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3056 return; 3057 3058 if (local->hw.conf.dynamic_ps_timeout > 0) { 3059 /* don't enter PS if TX frames are pending */ 3060 if (drv_tx_frames_pending(local)) { 3061 mod_timer(&local->dynamic_ps_timer, jiffies + 3062 msecs_to_jiffies( 3063 local->hw.conf.dynamic_ps_timeout)); 3064 return; 3065 } 3066 3067 /* 3068 * transmission can be stopped by others which leads to 3069 * dynamic_ps_timer expiry. Postpone the ps timer if it 3070 * is not the actual idle state. 3071 */ 3072 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3073 for (q = 0; q < local->hw.queues; q++) { 3074 if (local->queue_stop_reasons[q]) { 3075 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3076 flags); 3077 mod_timer(&local->dynamic_ps_timer, jiffies + 3078 msecs_to_jiffies( 3079 local->hw.conf.dynamic_ps_timeout)); 3080 return; 3081 } 3082 } 3083 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3084 } 3085 3086 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3087 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3088 if (drv_tx_frames_pending(local)) { 3089 mod_timer(&local->dynamic_ps_timer, jiffies + 3090 msecs_to_jiffies( 3091 local->hw.conf.dynamic_ps_timeout)); 3092 } else { 3093 ieee80211_send_nullfunc(local, sdata, true); 3094 /* Flush to get the tx status of nullfunc frame */ 3095 ieee80211_flush_queues(local, sdata, false); 3096 } 3097 } 3098 3099 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3100 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3101 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3102 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3103 local->hw.conf.flags |= IEEE80211_CONF_PS; 3104 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3105 } 3106 } 3107 3108 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3109 { 3110 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 3111 3112 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3113 } 3114 3115 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3116 { 3117 struct ieee80211_link_data *link = 3118 container_of(work, struct ieee80211_link_data, 3119 dfs_cac_timer_work.work); 3120 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3121 struct ieee80211_sub_if_data *sdata = link->sdata; 3122 3123 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3124 3125 if (sdata->wdev.links[link->link_id].cac_started) { 3126 ieee80211_link_release_channel(link); 3127 cfg80211_cac_event(sdata->dev, &chandef, 3128 NL80211_RADAR_CAC_FINISHED, 3129 GFP_KERNEL, link->link_id); 3130 } 3131 } 3132 3133 static bool 3134 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3135 { 3136 struct ieee80211_local *local = sdata->local; 3137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3138 bool ret = false; 3139 int ac; 3140 3141 if (local->hw.queues < IEEE80211_NUM_ACS) 3142 return false; 3143 3144 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3145 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3146 int non_acm_ac; 3147 unsigned long now = jiffies; 3148 3149 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3150 tx_tspec->admitted_time && 3151 time_after(now, tx_tspec->time_slice_start + HZ)) { 3152 tx_tspec->consumed_tx_time = 0; 3153 tx_tspec->time_slice_start = now; 3154 3155 if (tx_tspec->downgraded) 3156 tx_tspec->action = 3157 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3158 } 3159 3160 switch (tx_tspec->action) { 3161 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3162 /* take the original parameters */ 3163 if (drv_conf_tx(local, &sdata->deflink, ac, 3164 &sdata->deflink.tx_conf[ac])) 3165 link_err(&sdata->deflink, 3166 "failed to set TX queue parameters for queue %d\n", 3167 ac); 3168 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3169 tx_tspec->downgraded = false; 3170 ret = true; 3171 break; 3172 case TX_TSPEC_ACTION_DOWNGRADE: 3173 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3174 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3175 ret = true; 3176 break; 3177 } 3178 /* downgrade next lower non-ACM AC */ 3179 for (non_acm_ac = ac + 1; 3180 non_acm_ac < IEEE80211_NUM_ACS; 3181 non_acm_ac++) 3182 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3183 break; 3184 /* Usually the loop will result in using BK even if it 3185 * requires admission control, but such a configuration 3186 * makes no sense and we have to transmit somehow - the 3187 * AC selection does the same thing. 3188 * If we started out trying to downgrade from BK, then 3189 * the extra condition here might be needed. 3190 */ 3191 if (non_acm_ac >= IEEE80211_NUM_ACS) 3192 non_acm_ac = IEEE80211_AC_BK; 3193 if (drv_conf_tx(local, &sdata->deflink, ac, 3194 &sdata->deflink.tx_conf[non_acm_ac])) 3195 link_err(&sdata->deflink, 3196 "failed to set TX queue parameters for queue %d\n", 3197 ac); 3198 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3199 ret = true; 3200 wiphy_delayed_work_queue(local->hw.wiphy, 3201 &ifmgd->tx_tspec_wk, 3202 tx_tspec->time_slice_start + 3203 HZ - now + 1); 3204 break; 3205 case TX_TSPEC_ACTION_NONE: 3206 /* nothing now */ 3207 break; 3208 } 3209 } 3210 3211 return ret; 3212 } 3213 3214 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3215 { 3216 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3217 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3218 BSS_CHANGED_QOS); 3219 } 3220 3221 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3222 struct wiphy_work *work) 3223 { 3224 struct ieee80211_sub_if_data *sdata; 3225 3226 sdata = container_of(work, struct ieee80211_sub_if_data, 3227 u.mgd.tx_tspec_wk.work); 3228 ieee80211_sta_handle_tspec_ac_params(sdata); 3229 } 3230 3231 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3232 { 3233 struct ieee80211_sub_if_data *sdata = link->sdata; 3234 struct ieee80211_local *local = sdata->local; 3235 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3236 struct ieee80211_tx_queue_params *params = link->tx_conf; 3237 u8 ac; 3238 3239 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3240 mlme_dbg(sdata, 3241 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3242 ac, params[ac].acm, 3243 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3244 params[ac].txop, params[ac].uapsd, 3245 ifmgd->tx_tspec[ac].downgraded); 3246 if (!ifmgd->tx_tspec[ac].downgraded && 3247 drv_conf_tx(local, link, ac, ¶ms[ac])) 3248 link_err(link, 3249 "failed to set TX queue parameters for AC %d\n", 3250 ac); 3251 } 3252 } 3253 3254 /* MLME */ 3255 static bool 3256 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3257 struct ieee80211_link_data *link, 3258 const u8 *wmm_param, size_t wmm_param_len, 3259 const struct ieee80211_mu_edca_param_set *mu_edca) 3260 { 3261 struct ieee80211_sub_if_data *sdata = link->sdata; 3262 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3264 size_t left; 3265 int count, mu_edca_count, ac; 3266 const u8 *pos; 3267 u8 uapsd_queues = 0; 3268 3269 if (!local->ops->conf_tx) 3270 return false; 3271 3272 if (local->hw.queues < IEEE80211_NUM_ACS) 3273 return false; 3274 3275 if (!wmm_param) 3276 return false; 3277 3278 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3279 return false; 3280 3281 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3282 uapsd_queues = ifmgd->uapsd_queues; 3283 3284 count = wmm_param[6] & 0x0f; 3285 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3286 * if mu_edca was preset before and now it disappeared tell 3287 * the driver about it. 3288 */ 3289 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3290 if (count == link->u.mgd.wmm_last_param_set && 3291 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3292 return false; 3293 link->u.mgd.wmm_last_param_set = count; 3294 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3295 3296 pos = wmm_param + 8; 3297 left = wmm_param_len - 8; 3298 3299 memset(¶ms, 0, sizeof(params)); 3300 3301 sdata->wmm_acm = 0; 3302 for (; left >= 4; left -= 4, pos += 4) { 3303 int aci = (pos[0] >> 5) & 0x03; 3304 int acm = (pos[0] >> 4) & 0x01; 3305 bool uapsd = false; 3306 3307 switch (aci) { 3308 case 1: /* AC_BK */ 3309 ac = IEEE80211_AC_BK; 3310 if (acm) 3311 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3312 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3313 uapsd = true; 3314 params[ac].mu_edca = !!mu_edca; 3315 if (mu_edca) 3316 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3317 break; 3318 case 2: /* AC_VI */ 3319 ac = IEEE80211_AC_VI; 3320 if (acm) 3321 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3322 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3323 uapsd = true; 3324 params[ac].mu_edca = !!mu_edca; 3325 if (mu_edca) 3326 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3327 break; 3328 case 3: /* AC_VO */ 3329 ac = IEEE80211_AC_VO; 3330 if (acm) 3331 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3332 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3333 uapsd = true; 3334 params[ac].mu_edca = !!mu_edca; 3335 if (mu_edca) 3336 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3337 break; 3338 case 0: /* AC_BE */ 3339 default: 3340 ac = IEEE80211_AC_BE; 3341 if (acm) 3342 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3343 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3344 uapsd = true; 3345 params[ac].mu_edca = !!mu_edca; 3346 if (mu_edca) 3347 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3348 break; 3349 } 3350 3351 params[ac].aifs = pos[0] & 0x0f; 3352 3353 if (params[ac].aifs < 2) { 3354 link_info(link, 3355 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3356 params[ac].aifs, aci); 3357 params[ac].aifs = 2; 3358 } 3359 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3360 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3361 params[ac].txop = get_unaligned_le16(pos + 2); 3362 params[ac].acm = acm; 3363 params[ac].uapsd = uapsd; 3364 3365 if (params[ac].cw_min == 0 || 3366 params[ac].cw_min > params[ac].cw_max) { 3367 link_info(link, 3368 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3369 params[ac].cw_min, params[ac].cw_max, aci); 3370 return false; 3371 } 3372 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3373 } 3374 3375 /* WMM specification requires all 4 ACIs. */ 3376 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3377 if (params[ac].cw_min == 0) { 3378 link_info(link, 3379 "AP has invalid WMM params (missing AC %d), using defaults\n", 3380 ac); 3381 return false; 3382 } 3383 } 3384 3385 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3386 link->tx_conf[ac] = params[ac]; 3387 3388 ieee80211_mgd_set_link_qos_params(link); 3389 3390 /* enable WMM or activate new settings */ 3391 link->conf->qos = true; 3392 return true; 3393 } 3394 3395 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3396 { 3397 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3398 3399 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3400 ieee80211_run_deferred_scan(sdata->local); 3401 } 3402 3403 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3404 { 3405 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3406 3407 __ieee80211_stop_poll(sdata); 3408 } 3409 3410 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3411 u16 capab, bool erp_valid, u8 erp) 3412 { 3413 struct ieee80211_bss_conf *bss_conf = link->conf; 3414 struct ieee80211_supported_band *sband; 3415 u64 changed = 0; 3416 bool use_protection; 3417 bool use_short_preamble; 3418 bool use_short_slot; 3419 3420 sband = ieee80211_get_link_sband(link); 3421 if (!sband) 3422 return changed; 3423 3424 if (erp_valid) { 3425 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3426 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3427 } else { 3428 use_protection = false; 3429 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3430 } 3431 3432 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3433 if (sband->band == NL80211_BAND_5GHZ || 3434 sband->band == NL80211_BAND_6GHZ) 3435 use_short_slot = true; 3436 3437 if (use_protection != bss_conf->use_cts_prot) { 3438 bss_conf->use_cts_prot = use_protection; 3439 changed |= BSS_CHANGED_ERP_CTS_PROT; 3440 } 3441 3442 if (use_short_preamble != bss_conf->use_short_preamble) { 3443 bss_conf->use_short_preamble = use_short_preamble; 3444 changed |= BSS_CHANGED_ERP_PREAMBLE; 3445 } 3446 3447 if (use_short_slot != bss_conf->use_short_slot) { 3448 bss_conf->use_short_slot = use_short_slot; 3449 changed |= BSS_CHANGED_ERP_SLOT; 3450 } 3451 3452 return changed; 3453 } 3454 3455 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3456 struct cfg80211_bss *cbss) 3457 { 3458 struct ieee80211_sub_if_data *sdata = link->sdata; 3459 struct ieee80211_bss_conf *bss_conf = link->conf; 3460 struct ieee80211_bss *bss = (void *)cbss->priv; 3461 u64 changed = BSS_CHANGED_QOS; 3462 3463 /* not really used in MLO */ 3464 sdata->u.mgd.beacon_timeout = 3465 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3466 bss_conf->beacon_int)); 3467 3468 changed |= ieee80211_handle_bss_capability(link, 3469 bss_conf->assoc_capability, 3470 bss->has_erp_value, 3471 bss->erp_value); 3472 3473 ieee80211_check_rate_mask(link); 3474 3475 link->conf->bss = cbss; 3476 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3477 3478 if (sdata->vif.p2p || 3479 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3480 const struct cfg80211_bss_ies *ies; 3481 3482 rcu_read_lock(); 3483 ies = rcu_dereference(cbss->ies); 3484 if (ies) { 3485 int ret; 3486 3487 ret = cfg80211_get_p2p_attr( 3488 ies->data, ies->len, 3489 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3490 (u8 *) &bss_conf->p2p_noa_attr, 3491 sizeof(bss_conf->p2p_noa_attr)); 3492 if (ret >= 2) { 3493 link->u.mgd.p2p_noa_index = 3494 bss_conf->p2p_noa_attr.index; 3495 changed |= BSS_CHANGED_P2P_PS; 3496 } 3497 } 3498 rcu_read_unlock(); 3499 } 3500 3501 if (link->u.mgd.have_beacon) { 3502 bss_conf->beacon_rate = bss->beacon_rate; 3503 changed |= BSS_CHANGED_BEACON_INFO; 3504 } else { 3505 bss_conf->beacon_rate = NULL; 3506 } 3507 3508 /* Tell the driver to monitor connection quality (if supported) */ 3509 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3510 bss_conf->cqm_rssi_thold) 3511 changed |= BSS_CHANGED_CQM; 3512 3513 return changed; 3514 } 3515 3516 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3517 struct ieee80211_mgd_assoc_data *assoc_data, 3518 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3519 { 3520 struct ieee80211_local *local = sdata->local; 3521 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3522 u64 vif_changed = BSS_CHANGED_ASSOC; 3523 unsigned int link_id; 3524 3525 lockdep_assert_wiphy(local->hw.wiphy); 3526 3527 sdata->u.mgd.associated = true; 3528 3529 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3530 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3531 struct ieee80211_link_data *link; 3532 3533 if (!cbss || 3534 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3535 continue; 3536 3537 if (ieee80211_vif_is_mld(&sdata->vif) && 3538 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3539 continue; 3540 3541 link = sdata_dereference(sdata->link[link_id], sdata); 3542 if (WARN_ON(!link)) 3543 return; 3544 3545 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3546 } 3547 3548 /* just to be sure */ 3549 ieee80211_stop_poll(sdata); 3550 3551 ieee80211_led_assoc(local, 1); 3552 3553 vif_cfg->assoc = 1; 3554 3555 /* Enable ARP filtering */ 3556 if (vif_cfg->arp_addr_cnt) 3557 vif_changed |= BSS_CHANGED_ARP_FILTER; 3558 3559 if (ieee80211_vif_is_mld(&sdata->vif)) { 3560 for (link_id = 0; 3561 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3562 link_id++) { 3563 struct ieee80211_link_data *link; 3564 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3565 3566 if (!cbss || 3567 !(BIT(link_id) & 3568 ieee80211_vif_usable_links(&sdata->vif)) || 3569 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3570 continue; 3571 3572 link = sdata_dereference(sdata->link[link_id], sdata); 3573 if (WARN_ON(!link)) 3574 return; 3575 3576 ieee80211_link_info_change_notify(sdata, link, 3577 changed[link_id]); 3578 3579 ieee80211_recalc_smps(sdata, link); 3580 } 3581 3582 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3583 } else { 3584 ieee80211_bss_info_change_notify(sdata, 3585 vif_changed | changed[0]); 3586 } 3587 3588 ieee80211_recalc_ps(local); 3589 3590 /* leave this here to not change ordering in non-MLO cases */ 3591 if (!ieee80211_vif_is_mld(&sdata->vif)) 3592 ieee80211_recalc_smps(sdata, &sdata->deflink); 3593 ieee80211_recalc_ps_vif(sdata); 3594 3595 netif_carrier_on(sdata->dev); 3596 } 3597 3598 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3599 u16 stype, u16 reason, bool tx, 3600 u8 *frame_buf) 3601 { 3602 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3603 struct ieee80211_local *local = sdata->local; 3604 unsigned int link_id; 3605 u64 changed = 0; 3606 struct ieee80211_prep_tx_info info = { 3607 .subtype = stype, 3608 .was_assoc = true, 3609 .link_id = ffs(sdata->vif.active_links) - 1, 3610 }; 3611 3612 lockdep_assert_wiphy(local->hw.wiphy); 3613 3614 if (WARN_ON_ONCE(tx && !frame_buf)) 3615 return; 3616 3617 if (WARN_ON(!ifmgd->associated)) 3618 return; 3619 3620 ieee80211_stop_poll(sdata); 3621 3622 ifmgd->associated = false; 3623 3624 /* other links will be destroyed */ 3625 sdata->deflink.conf->bss = NULL; 3626 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 3627 3628 netif_carrier_off(sdata->dev); 3629 3630 /* 3631 * if we want to get out of ps before disassoc (why?) we have 3632 * to do it before sending disassoc, as otherwise the null-packet 3633 * won't be valid. 3634 */ 3635 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3636 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3637 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3638 } 3639 local->ps_sdata = NULL; 3640 3641 /* disable per-vif ps */ 3642 ieee80211_recalc_ps_vif(sdata); 3643 3644 /* make sure ongoing transmission finishes */ 3645 synchronize_net(); 3646 3647 /* 3648 * drop any frame before deauth/disassoc, this can be data or 3649 * management frame. Since we are disconnecting, we should not 3650 * insist sending these frames which can take time and delay 3651 * the disconnection and possible the roaming. 3652 */ 3653 if (tx) 3654 ieee80211_flush_queues(local, sdata, true); 3655 3656 /* deauthenticate/disassociate now */ 3657 if (tx || frame_buf) { 3658 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3659 3660 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 3661 sdata->vif.cfg.ap_addr, stype, 3662 reason, tx, frame_buf); 3663 } 3664 3665 /* flush out frame - make sure the deauth was actually sent */ 3666 if (tx) 3667 ieee80211_flush_queues(local, sdata, false); 3668 3669 drv_mgd_complete_tx(sdata->local, sdata, &info); 3670 3671 /* clear AP addr only after building the needed mgmt frames */ 3672 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3673 eth_zero_addr(sdata->vif.cfg.ap_addr); 3674 3675 sdata->vif.cfg.ssid_len = 0; 3676 3677 /* remove AP and TDLS peers */ 3678 sta_info_flush(sdata, -1); 3679 3680 /* finally reset all BSS / config parameters */ 3681 if (!ieee80211_vif_is_mld(&sdata->vif)) 3682 changed |= ieee80211_reset_erp_info(sdata); 3683 3684 ieee80211_led_assoc(local, 0); 3685 changed |= BSS_CHANGED_ASSOC; 3686 sdata->vif.cfg.assoc = false; 3687 3688 sdata->deflink.u.mgd.p2p_noa_index = -1; 3689 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 3690 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 3691 3692 /* on the next assoc, re-program HT/VHT parameters */ 3693 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 3694 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 3695 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 3696 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 3697 3698 /* 3699 * reset MU-MIMO ownership and group data in default link, 3700 * if used, other links are destroyed 3701 */ 3702 memset(sdata->vif.bss_conf.mu_group.membership, 0, 3703 sizeof(sdata->vif.bss_conf.mu_group.membership)); 3704 memset(sdata->vif.bss_conf.mu_group.position, 0, 3705 sizeof(sdata->vif.bss_conf.mu_group.position)); 3706 if (!ieee80211_vif_is_mld(&sdata->vif)) 3707 changed |= BSS_CHANGED_MU_GROUPS; 3708 sdata->vif.bss_conf.mu_mimo_owner = false; 3709 3710 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3711 3712 del_timer_sync(&local->dynamic_ps_timer); 3713 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 3714 3715 /* Disable ARP filtering */ 3716 if (sdata->vif.cfg.arp_addr_cnt) 3717 changed |= BSS_CHANGED_ARP_FILTER; 3718 3719 sdata->vif.bss_conf.qos = false; 3720 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3721 changed |= BSS_CHANGED_QOS; 3722 /* The BSSID (not really interesting) and HT changed */ 3723 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3724 ieee80211_bss_info_change_notify(sdata, changed); 3725 } else { 3726 ieee80211_vif_cfg_change_notify(sdata, changed); 3727 } 3728 3729 /* disassociated - set to defaults now */ 3730 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3731 3732 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3733 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3734 del_timer_sync(&sdata->u.mgd.timer); 3735 3736 sdata->vif.bss_conf.dtim_period = 0; 3737 sdata->vif.bss_conf.beacon_rate = NULL; 3738 3739 sdata->deflink.u.mgd.have_beacon = false; 3740 sdata->deflink.u.mgd.tracking_signal_avg = false; 3741 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3742 3743 ifmgd->flags = 0; 3744 3745 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3746 struct ieee80211_link_data *link; 3747 3748 link = sdata_dereference(sdata->link[link_id], sdata); 3749 if (!link) 3750 continue; 3751 ieee80211_link_release_channel(link); 3752 } 3753 3754 sdata->vif.bss_conf.csa_active = false; 3755 sdata->deflink.u.mgd.csa.blocked_tx = false; 3756 sdata->deflink.u.mgd.csa.waiting_bcn = false; 3757 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 3758 ieee80211_vif_unblock_queues_csa(sdata); 3759 3760 /* existing TX TSPEC sessions no longer exist */ 3761 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3762 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 3763 3764 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 3765 sdata->vif.bss_conf.pwr_reduction = 0; 3766 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 3767 3768 sdata->vif.cfg.eml_cap = 0; 3769 sdata->vif.cfg.eml_med_sync_delay = 0; 3770 sdata->vif.cfg.mld_capa_op = 0; 3771 3772 memset(&sdata->u.mgd.ttlm_info, 0, 3773 sizeof(sdata->u.mgd.ttlm_info)); 3774 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 3775 3776 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 3777 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3778 &ifmgd->neg_ttlm_timeout_work); 3779 3780 sdata->u.mgd.removed_links = 0; 3781 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3782 &sdata->u.mgd.ml_reconf_work); 3783 3784 wiphy_work_cancel(sdata->local->hw.wiphy, 3785 &ifmgd->teardown_ttlm_work); 3786 3787 ieee80211_vif_set_links(sdata, 0, 0); 3788 3789 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 3790 } 3791 3792 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3793 { 3794 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3795 struct ieee80211_local *local = sdata->local; 3796 3797 lockdep_assert_wiphy(local->hw.wiphy); 3798 3799 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3800 return; 3801 3802 __ieee80211_stop_poll(sdata); 3803 3804 ieee80211_recalc_ps(local); 3805 3806 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3807 return; 3808 3809 /* 3810 * We've received a probe response, but are not sure whether 3811 * we have or will be receiving any beacons or data, so let's 3812 * schedule the timers again, just in case. 3813 */ 3814 ieee80211_sta_reset_beacon_monitor(sdata); 3815 3816 mod_timer(&ifmgd->conn_mon_timer, 3817 round_jiffies_up(jiffies + 3818 IEEE80211_CONNECTION_IDLE_TIME)); 3819 } 3820 3821 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3822 struct ieee80211_hdr *hdr, 3823 u16 tx_time) 3824 { 3825 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3826 u16 tid; 3827 int ac; 3828 struct ieee80211_sta_tx_tspec *tx_tspec; 3829 unsigned long now = jiffies; 3830 3831 if (!ieee80211_is_data_qos(hdr->frame_control)) 3832 return; 3833 3834 tid = ieee80211_get_tid(hdr); 3835 ac = ieee80211_ac_from_tid(tid); 3836 tx_tspec = &ifmgd->tx_tspec[ac]; 3837 3838 if (likely(!tx_tspec->admitted_time)) 3839 return; 3840 3841 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3842 tx_tspec->consumed_tx_time = 0; 3843 tx_tspec->time_slice_start = now; 3844 3845 if (tx_tspec->downgraded) { 3846 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3847 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3848 &ifmgd->tx_tspec_wk, 0); 3849 } 3850 } 3851 3852 if (tx_tspec->downgraded) 3853 return; 3854 3855 tx_tspec->consumed_tx_time += tx_time; 3856 3857 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3858 tx_tspec->downgraded = true; 3859 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3860 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3861 &ifmgd->tx_tspec_wk, 0); 3862 } 3863 } 3864 3865 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3866 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3867 { 3868 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3869 3870 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3871 !sdata->u.mgd.probe_send_count) 3872 return; 3873 3874 if (ack) 3875 sdata->u.mgd.probe_send_count = 0; 3876 else 3877 sdata->u.mgd.nullfunc_failed = true; 3878 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3879 } 3880 3881 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3882 const u8 *src, const u8 *dst, 3883 const u8 *ssid, size_t ssid_len, 3884 struct ieee80211_channel *channel) 3885 { 3886 struct sk_buff *skb; 3887 3888 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3889 ssid, ssid_len, NULL, 0, 3890 IEEE80211_PROBE_FLAG_DIRECTED); 3891 if (skb) 3892 ieee80211_tx_skb(sdata, skb); 3893 } 3894 3895 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3896 { 3897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3898 u8 *dst = sdata->vif.cfg.ap_addr; 3899 u8 unicast_limit = max(1, max_probe_tries - 3); 3900 struct sta_info *sta; 3901 3902 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3903 3904 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 3905 return; 3906 3907 /* 3908 * Try sending broadcast probe requests for the last three 3909 * probe requests after the first ones failed since some 3910 * buggy APs only support broadcast probe requests. 3911 */ 3912 if (ifmgd->probe_send_count >= unicast_limit) 3913 dst = NULL; 3914 3915 /* 3916 * When the hardware reports an accurate Tx ACK status, it's 3917 * better to send a nullfunc frame instead of a probe request, 3918 * as it will kick us off the AP quickly if we aren't associated 3919 * anymore. The timeout will be reset if the frame is ACKed by 3920 * the AP. 3921 */ 3922 ifmgd->probe_send_count++; 3923 3924 if (dst) { 3925 sta = sta_info_get(sdata, dst); 3926 if (!WARN_ON(!sta)) 3927 ieee80211_check_fast_rx(sta); 3928 } 3929 3930 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3931 ifmgd->nullfunc_failed = false; 3932 ieee80211_send_nullfunc(sdata->local, sdata, false); 3933 } else { 3934 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3935 sdata->vif.cfg.ssid, 3936 sdata->vif.cfg.ssid_len, 3937 sdata->deflink.conf->bss->channel); 3938 } 3939 3940 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3941 run_again(sdata, ifmgd->probe_timeout); 3942 } 3943 3944 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3945 bool beacon) 3946 { 3947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3948 bool already = false; 3949 3950 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3951 3952 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 3953 return; 3954 3955 if (!ieee80211_sdata_running(sdata)) 3956 return; 3957 3958 if (!ifmgd->associated) 3959 return; 3960 3961 if (sdata->local->tmp_channel || sdata->local->scanning) 3962 return; 3963 3964 if (sdata->local->suspending) { 3965 /* reschedule after resume */ 3966 ieee80211_reset_ap_probe(sdata); 3967 return; 3968 } 3969 3970 if (beacon) { 3971 mlme_dbg_ratelimited(sdata, 3972 "detected beacon loss from AP (missed %d beacons) - probing\n", 3973 beacon_loss_count); 3974 3975 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3976 } 3977 3978 /* 3979 * The driver/our work has already reported this event or the 3980 * connection monitoring has kicked in and we have already sent 3981 * a probe request. Or maybe the AP died and the driver keeps 3982 * reporting until we disassociate... 3983 * 3984 * In either case we have to ignore the current call to this 3985 * function (except for setting the correct probe reason bit) 3986 * because otherwise we would reset the timer every time and 3987 * never check whether we received a probe response! 3988 */ 3989 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3990 already = true; 3991 3992 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3993 3994 if (already) 3995 return; 3996 3997 ieee80211_recalc_ps(sdata->local); 3998 3999 ifmgd->probe_send_count = 0; 4000 ieee80211_mgd_probe_ap_send(sdata); 4001 } 4002 4003 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4004 struct ieee80211_vif *vif) 4005 { 4006 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4008 struct cfg80211_bss *cbss; 4009 struct sk_buff *skb; 4010 const struct element *ssid; 4011 int ssid_len; 4012 4013 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4014 4015 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4016 ieee80211_vif_is_mld(&sdata->vif))) 4017 return NULL; 4018 4019 if (ifmgd->associated) 4020 cbss = sdata->deflink.conf->bss; 4021 else if (ifmgd->auth_data) 4022 cbss = ifmgd->auth_data->bss; 4023 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4024 cbss = ifmgd->assoc_data->link[0].bss; 4025 else 4026 return NULL; 4027 4028 rcu_read_lock(); 4029 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4030 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4031 "invalid SSID element (len=%d)", 4032 ssid ? ssid->datalen : -1)) 4033 ssid_len = 0; 4034 else 4035 ssid_len = ssid->datalen; 4036 4037 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4038 (u32) -1, cbss->channel, 4039 ssid->data, ssid_len, 4040 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4041 rcu_read_unlock(); 4042 4043 return skb; 4044 } 4045 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4046 4047 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4048 const u8 *buf, size_t len, bool tx, 4049 u16 reason, bool reconnect) 4050 { 4051 struct ieee80211_event event = { 4052 .type = MLME_EVENT, 4053 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4054 .u.mlme.reason = reason, 4055 }; 4056 4057 if (tx) 4058 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4059 else 4060 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4061 4062 drv_event_callback(sdata->local, sdata, &event); 4063 } 4064 4065 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4066 { 4067 struct ieee80211_local *local = sdata->local; 4068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4069 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4070 bool tx = false; 4071 4072 lockdep_assert_wiphy(local->hw.wiphy); 4073 4074 if (!ifmgd->associated) 4075 return; 4076 4077 /* only transmit if we have a link that makes that worthwhile */ 4078 for (unsigned int link_id = 0; 4079 link_id < ARRAY_SIZE(sdata->link); 4080 link_id++) { 4081 struct ieee80211_link_data *link; 4082 4083 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4084 continue; 4085 4086 link = sdata_dereference(sdata->link[link_id], sdata); 4087 if (WARN_ON_ONCE(!link)) 4088 continue; 4089 4090 if (link->u.mgd.csa.blocked_tx) 4091 continue; 4092 4093 tx = true; 4094 break; 4095 } 4096 4097 if (!ifmgd->driver_disconnect) { 4098 unsigned int link_id; 4099 4100 /* 4101 * AP is probably out of range (or not reachable for another 4102 * reason) so remove the bss structs for that AP. In the case 4103 * of multi-link, it's not clear that all of them really are 4104 * out of range, but if they weren't the driver likely would 4105 * have switched to just have a single link active? 4106 */ 4107 for (link_id = 0; 4108 link_id < ARRAY_SIZE(sdata->link); 4109 link_id++) { 4110 struct ieee80211_link_data *link; 4111 4112 link = sdata_dereference(sdata->link[link_id], sdata); 4113 if (!link) 4114 continue; 4115 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4116 link->conf->bss = NULL; 4117 } 4118 } 4119 4120 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4121 ifmgd->driver_disconnect ? 4122 WLAN_REASON_DEAUTH_LEAVING : 4123 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4124 tx, frame_buf); 4125 /* the other links will be destroyed */ 4126 sdata->vif.bss_conf.csa_active = false; 4127 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4128 sdata->deflink.u.mgd.csa.blocked_tx = false; 4129 ieee80211_vif_unblock_queues_csa(sdata); 4130 4131 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 4132 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4133 ifmgd->reconnect); 4134 ifmgd->reconnect = false; 4135 } 4136 4137 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4138 struct wiphy_work *work) 4139 { 4140 struct ieee80211_sub_if_data *sdata = 4141 container_of(work, struct ieee80211_sub_if_data, 4142 u.mgd.beacon_connection_loss_work); 4143 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4144 4145 if (ifmgd->connection_loss) { 4146 sdata_info(sdata, "Connection to AP %pM lost\n", 4147 sdata->vif.cfg.ap_addr); 4148 __ieee80211_disconnect(sdata); 4149 ifmgd->connection_loss = false; 4150 } else if (ifmgd->driver_disconnect) { 4151 sdata_info(sdata, 4152 "Driver requested disconnection from AP %pM\n", 4153 sdata->vif.cfg.ap_addr); 4154 __ieee80211_disconnect(sdata); 4155 ifmgd->driver_disconnect = false; 4156 } else { 4157 if (ifmgd->associated) 4158 sdata->deflink.u.mgd.beacon_loss_count++; 4159 ieee80211_mgd_probe_ap(sdata, true); 4160 } 4161 } 4162 4163 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4164 struct wiphy_work *work) 4165 { 4166 struct ieee80211_sub_if_data *sdata = 4167 container_of(work, struct ieee80211_sub_if_data, 4168 u.mgd.csa_connection_drop_work); 4169 4170 __ieee80211_disconnect(sdata); 4171 } 4172 4173 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4174 { 4175 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4176 struct ieee80211_hw *hw = &sdata->local->hw; 4177 4178 trace_api_beacon_loss(sdata); 4179 4180 sdata->u.mgd.connection_loss = false; 4181 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4182 } 4183 EXPORT_SYMBOL(ieee80211_beacon_loss); 4184 4185 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4186 { 4187 struct ieee80211_sub_if_data *sdata; 4188 struct ieee80211_hw *hw; 4189 4190 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4191 4192 sdata = vif_to_sdata(vif); 4193 hw = &sdata->local->hw; 4194 4195 trace_api_connection_loss(sdata); 4196 4197 sdata->u.mgd.connection_loss = true; 4198 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4199 } 4200 EXPORT_SYMBOL(ieee80211_connection_loss); 4201 4202 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4203 { 4204 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4205 struct ieee80211_hw *hw = &sdata->local->hw; 4206 4207 trace_api_disconnect(sdata, reconnect); 4208 4209 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4210 return; 4211 4212 sdata->u.mgd.driver_disconnect = true; 4213 sdata->u.mgd.reconnect = reconnect; 4214 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4215 } 4216 EXPORT_SYMBOL(ieee80211_disconnect); 4217 4218 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4219 bool assoc) 4220 { 4221 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4222 4223 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4224 4225 if (!assoc) { 4226 /* 4227 * we are not authenticated yet, the only timer that could be 4228 * running is the timeout for the authentication response which 4229 * which is not relevant anymore. 4230 */ 4231 del_timer_sync(&sdata->u.mgd.timer); 4232 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4233 4234 /* other links are destroyed */ 4235 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4236 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4237 BSS_CHANGED_BSSID); 4238 sdata->u.mgd.flags = 0; 4239 4240 ieee80211_link_release_channel(&sdata->deflink); 4241 ieee80211_vif_set_links(sdata, 0, 0); 4242 } 4243 4244 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4245 kfree(auth_data); 4246 sdata->u.mgd.auth_data = NULL; 4247 } 4248 4249 enum assoc_status { 4250 ASSOC_SUCCESS, 4251 ASSOC_REJECTED, 4252 ASSOC_TIMEOUT, 4253 ASSOC_ABANDON, 4254 }; 4255 4256 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4257 enum assoc_status status) 4258 { 4259 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4260 4261 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4262 4263 if (status != ASSOC_SUCCESS) { 4264 /* 4265 * we are not associated yet, the only timer that could be 4266 * running is the timeout for the association response which 4267 * which is not relevant anymore. 4268 */ 4269 del_timer_sync(&sdata->u.mgd.timer); 4270 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4271 4272 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4273 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4274 BSS_CHANGED_BSSID); 4275 sdata->u.mgd.flags = 0; 4276 sdata->vif.bss_conf.mu_mimo_owner = false; 4277 4278 if (status != ASSOC_REJECTED) { 4279 struct cfg80211_assoc_failure data = { 4280 .timeout = status == ASSOC_TIMEOUT, 4281 }; 4282 int i; 4283 4284 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4285 ARRAY_SIZE(assoc_data->link)); 4286 4287 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4288 data.bss[i] = assoc_data->link[i].bss; 4289 4290 if (ieee80211_vif_is_mld(&sdata->vif)) 4291 data.ap_mld_addr = assoc_data->ap_addr; 4292 4293 cfg80211_assoc_failure(sdata->dev, &data); 4294 } 4295 4296 ieee80211_link_release_channel(&sdata->deflink); 4297 ieee80211_vif_set_links(sdata, 0, 0); 4298 } 4299 4300 kfree(assoc_data); 4301 sdata->u.mgd.assoc_data = NULL; 4302 } 4303 4304 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4305 struct ieee80211_mgmt *mgmt, size_t len) 4306 { 4307 struct ieee80211_local *local = sdata->local; 4308 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4309 const struct element *challenge; 4310 u8 *pos; 4311 u32 tx_flags = 0; 4312 struct ieee80211_prep_tx_info info = { 4313 .subtype = IEEE80211_STYPE_AUTH, 4314 .link_id = auth_data->link_id, 4315 }; 4316 4317 pos = mgmt->u.auth.variable; 4318 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4319 len - (pos - (u8 *)mgmt)); 4320 if (!challenge) 4321 return; 4322 auth_data->expected_transaction = 4; 4323 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4324 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4325 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4326 IEEE80211_TX_INTFL_MLME_CONN_TX; 4327 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4328 (void *)challenge, 4329 challenge->datalen + sizeof(*challenge), 4330 auth_data->ap_addr, auth_data->ap_addr, 4331 auth_data->key, auth_data->key_len, 4332 auth_data->key_idx, tx_flags); 4333 } 4334 4335 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4336 { 4337 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4338 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4339 struct sta_info *sta; 4340 4341 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4342 4343 sdata_info(sdata, "authenticated\n"); 4344 ifmgd->auth_data->done = true; 4345 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4346 ifmgd->auth_data->timeout_started = true; 4347 run_again(sdata, ifmgd->auth_data->timeout); 4348 4349 /* move station state to auth */ 4350 sta = sta_info_get(sdata, ap_addr); 4351 if (!sta) { 4352 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4353 return false; 4354 } 4355 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4356 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4357 return false; 4358 } 4359 4360 return true; 4361 } 4362 4363 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4364 struct ieee80211_mgmt *mgmt, size_t len) 4365 { 4366 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4367 u16 auth_alg, auth_transaction, status_code; 4368 struct ieee80211_event event = { 4369 .type = MLME_EVENT, 4370 .u.mlme.data = AUTH_EVENT, 4371 }; 4372 struct ieee80211_prep_tx_info info = { 4373 .subtype = IEEE80211_STYPE_AUTH, 4374 }; 4375 4376 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4377 4378 if (len < 24 + 6) 4379 return; 4380 4381 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4382 return; 4383 4384 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4385 return; 4386 4387 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4388 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4389 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4390 4391 if (auth_alg != ifmgd->auth_data->algorithm || 4392 (auth_alg != WLAN_AUTH_SAE && 4393 auth_transaction != ifmgd->auth_data->expected_transaction) || 4394 (auth_alg == WLAN_AUTH_SAE && 4395 (auth_transaction < ifmgd->auth_data->expected_transaction || 4396 auth_transaction > 2))) { 4397 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4398 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4399 auth_transaction, 4400 ifmgd->auth_data->expected_transaction); 4401 goto notify_driver; 4402 } 4403 4404 if (status_code != WLAN_STATUS_SUCCESS) { 4405 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4406 4407 if (auth_alg == WLAN_AUTH_SAE && 4408 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4409 (auth_transaction == 1 && 4410 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4411 status_code == WLAN_STATUS_SAE_PK)))) { 4412 /* waiting for userspace now */ 4413 ifmgd->auth_data->waiting = true; 4414 ifmgd->auth_data->timeout = 4415 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4416 ifmgd->auth_data->timeout_started = true; 4417 run_again(sdata, ifmgd->auth_data->timeout); 4418 goto notify_driver; 4419 } 4420 4421 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4422 mgmt->sa, status_code); 4423 ieee80211_destroy_auth_data(sdata, false); 4424 event.u.mlme.status = MLME_DENIED; 4425 event.u.mlme.reason = status_code; 4426 drv_event_callback(sdata->local, sdata, &event); 4427 goto notify_driver; 4428 } 4429 4430 switch (ifmgd->auth_data->algorithm) { 4431 case WLAN_AUTH_OPEN: 4432 case WLAN_AUTH_LEAP: 4433 case WLAN_AUTH_FT: 4434 case WLAN_AUTH_SAE: 4435 case WLAN_AUTH_FILS_SK: 4436 case WLAN_AUTH_FILS_SK_PFS: 4437 case WLAN_AUTH_FILS_PK: 4438 break; 4439 case WLAN_AUTH_SHARED_KEY: 4440 if (ifmgd->auth_data->expected_transaction != 4) { 4441 ieee80211_auth_challenge(sdata, mgmt, len); 4442 /* need another frame */ 4443 return; 4444 } 4445 break; 4446 default: 4447 WARN_ONCE(1, "invalid auth alg %d", 4448 ifmgd->auth_data->algorithm); 4449 goto notify_driver; 4450 } 4451 4452 event.u.mlme.status = MLME_SUCCESS; 4453 info.success = 1; 4454 drv_event_callback(sdata->local, sdata, &event); 4455 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4456 (auth_transaction == 2 && 4457 ifmgd->auth_data->expected_transaction == 2)) { 4458 if (!ieee80211_mark_sta_auth(sdata)) 4459 return; /* ignore frame -- wait for timeout */ 4460 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4461 auth_transaction == 2) { 4462 sdata_info(sdata, "SAE peer confirmed\n"); 4463 ifmgd->auth_data->peer_confirmed = true; 4464 } 4465 4466 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4467 notify_driver: 4468 drv_mgd_complete_tx(sdata->local, sdata, &info); 4469 } 4470 4471 #define case_WLAN(type) \ 4472 case WLAN_REASON_##type: return #type 4473 4474 const char *ieee80211_get_reason_code_string(u16 reason_code) 4475 { 4476 switch (reason_code) { 4477 case_WLAN(UNSPECIFIED); 4478 case_WLAN(PREV_AUTH_NOT_VALID); 4479 case_WLAN(DEAUTH_LEAVING); 4480 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4481 case_WLAN(DISASSOC_AP_BUSY); 4482 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4483 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4484 case_WLAN(DISASSOC_STA_HAS_LEFT); 4485 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4486 case_WLAN(DISASSOC_BAD_POWER); 4487 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4488 case_WLAN(INVALID_IE); 4489 case_WLAN(MIC_FAILURE); 4490 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4491 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4492 case_WLAN(IE_DIFFERENT); 4493 case_WLAN(INVALID_GROUP_CIPHER); 4494 case_WLAN(INVALID_PAIRWISE_CIPHER); 4495 case_WLAN(INVALID_AKMP); 4496 case_WLAN(UNSUPP_RSN_VERSION); 4497 case_WLAN(INVALID_RSN_IE_CAP); 4498 case_WLAN(IEEE8021X_FAILED); 4499 case_WLAN(CIPHER_SUITE_REJECTED); 4500 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4501 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4502 case_WLAN(DISASSOC_LOW_ACK); 4503 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4504 case_WLAN(QSTA_LEAVE_QBSS); 4505 case_WLAN(QSTA_NOT_USE); 4506 case_WLAN(QSTA_REQUIRE_SETUP); 4507 case_WLAN(QSTA_TIMEOUT); 4508 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4509 case_WLAN(MESH_PEER_CANCELED); 4510 case_WLAN(MESH_MAX_PEERS); 4511 case_WLAN(MESH_CONFIG); 4512 case_WLAN(MESH_CLOSE); 4513 case_WLAN(MESH_MAX_RETRIES); 4514 case_WLAN(MESH_CONFIRM_TIMEOUT); 4515 case_WLAN(MESH_INVALID_GTK); 4516 case_WLAN(MESH_INCONSISTENT_PARAM); 4517 case_WLAN(MESH_INVALID_SECURITY); 4518 case_WLAN(MESH_PATH_ERROR); 4519 case_WLAN(MESH_PATH_NOFORWARD); 4520 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4521 case_WLAN(MAC_EXISTS_IN_MBSS); 4522 case_WLAN(MESH_CHAN_REGULATORY); 4523 case_WLAN(MESH_CHAN); 4524 default: return "<unknown>"; 4525 } 4526 } 4527 4528 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4529 struct ieee80211_mgmt *mgmt, size_t len) 4530 { 4531 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4532 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4533 4534 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4535 4536 if (len < 24 + 2) 4537 return; 4538 4539 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4540 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4541 return; 4542 } 4543 4544 if (ifmgd->associated && 4545 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4546 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4547 sdata->vif.cfg.ap_addr, reason_code, 4548 ieee80211_get_reason_code_string(reason_code)); 4549 4550 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4551 4552 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4553 reason_code, false); 4554 return; 4555 } 4556 4557 if (ifmgd->assoc_data && 4558 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4559 sdata_info(sdata, 4560 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4561 ifmgd->assoc_data->ap_addr, reason_code, 4562 ieee80211_get_reason_code_string(reason_code)); 4563 4564 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4565 4566 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4567 return; 4568 } 4569 } 4570 4571 4572 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4573 struct ieee80211_mgmt *mgmt, size_t len) 4574 { 4575 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4576 u16 reason_code; 4577 4578 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4579 4580 if (len < 24 + 2) 4581 return; 4582 4583 if (!ifmgd->associated || 4584 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 4585 return; 4586 4587 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 4588 4589 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4590 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4591 return; 4592 } 4593 4594 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 4595 sdata->vif.cfg.ap_addr, reason_code, 4596 ieee80211_get_reason_code_string(reason_code)); 4597 4598 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4599 4600 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 4601 false); 4602 } 4603 4604 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 4605 u8 *supp_rates, unsigned int supp_rates_len, 4606 u32 *rates, u32 *basic_rates, 4607 bool *have_higher_than_11mbit, 4608 int *min_rate, int *min_rate_index) 4609 { 4610 int i, j; 4611 4612 for (i = 0; i < supp_rates_len; i++) { 4613 int rate = supp_rates[i] & 0x7f; 4614 bool is_basic = !!(supp_rates[i] & 0x80); 4615 4616 if ((rate * 5) > 110) 4617 *have_higher_than_11mbit = true; 4618 4619 /* 4620 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 4621 * selectors since they're not rates. 4622 * 4623 * Note: Even though the membership selector and the basic 4624 * rate flag share the same bit, they are not exactly 4625 * the same. 4626 */ 4627 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 4628 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 4629 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 4630 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 4631 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 4632 continue; 4633 4634 for (j = 0; j < sband->n_bitrates; j++) { 4635 struct ieee80211_rate *br; 4636 int brate; 4637 4638 br = &sband->bitrates[j]; 4639 4640 brate = DIV_ROUND_UP(br->bitrate, 5); 4641 if (brate == rate) { 4642 *rates |= BIT(j); 4643 if (is_basic) 4644 *basic_rates |= BIT(j); 4645 if ((rate * 5) < *min_rate) { 4646 *min_rate = rate * 5; 4647 *min_rate_index = j; 4648 } 4649 break; 4650 } 4651 } 4652 } 4653 } 4654 4655 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 4656 struct ieee80211_supported_band *sband, 4657 const struct link_sta_info *link_sta, 4658 const struct ieee802_11_elems *elems) 4659 { 4660 const struct ieee80211_sta_he_cap *own_he_cap = 4661 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4662 4663 if (elems->ext_capab_len < 10) 4664 return false; 4665 4666 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 4667 return false; 4668 4669 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 4670 IEEE80211_HE_MAC_CAP0_TWT_RES && 4671 own_he_cap && 4672 (own_he_cap->he_cap_elem.mac_cap_info[0] & 4673 IEEE80211_HE_MAC_CAP0_TWT_REQ); 4674 } 4675 4676 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 4677 struct ieee80211_supported_band *sband, 4678 struct ieee80211_link_data *link, 4679 struct link_sta_info *link_sta, 4680 struct ieee802_11_elems *elems) 4681 { 4682 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 4683 4684 if (link->conf->twt_requester != twt) { 4685 link->conf->twt_requester = twt; 4686 return BSS_CHANGED_TWT; 4687 } 4688 return 0; 4689 } 4690 4691 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 4692 struct ieee80211_bss_conf *bss_conf, 4693 struct ieee80211_supported_band *sband, 4694 struct link_sta_info *link_sta) 4695 { 4696 const struct ieee80211_sta_he_cap *own_he_cap = 4697 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4698 4699 return bss_conf->he_support && 4700 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 4701 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 4702 own_he_cap && 4703 (own_he_cap->he_cap_elem.mac_cap_info[2] & 4704 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 4705 } 4706 4707 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 4708 struct link_sta_info *link_sta, 4709 struct cfg80211_bss *cbss, 4710 struct ieee80211_mgmt *mgmt, 4711 const u8 *elem_start, 4712 unsigned int elem_len, 4713 u64 *changed) 4714 { 4715 struct ieee80211_sub_if_data *sdata = link->sdata; 4716 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4717 struct ieee80211_bss_conf *bss_conf = link->conf; 4718 struct ieee80211_local *local = sdata->local; 4719 unsigned int link_id = link->link_id; 4720 struct ieee80211_elems_parse_params parse_params = { 4721 .mode = link->u.mgd.conn.mode, 4722 .start = elem_start, 4723 .len = elem_len, 4724 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4725 .from_ap = true, 4726 }; 4727 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4728 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4729 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4730 const struct cfg80211_bss_ies *bss_ies = NULL; 4731 struct ieee80211_supported_band *sband; 4732 struct ieee802_11_elems *elems; 4733 const __le16 prof_bss_param_ch_present = 4734 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 4735 u16 capab_info; 4736 bool ret; 4737 4738 elems = ieee802_11_parse_elems_full(&parse_params); 4739 if (!elems) 4740 return false; 4741 4742 if (link_id == assoc_data->assoc_link_id) { 4743 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4744 4745 /* 4746 * we should not get to this flow unless the association was 4747 * successful, so set the status directly to success 4748 */ 4749 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4750 if (elems->ml_basic) { 4751 int bss_param_ch_cnt = 4752 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 4753 4754 if (bss_param_ch_cnt < 0) { 4755 ret = false; 4756 goto out; 4757 } 4758 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 4759 bss_conf->bss_param_ch_cnt_link_id = link_id; 4760 } 4761 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 4762 !elems->prof || 4763 !(elems->prof->control & prof_bss_param_ch_present)) { 4764 ret = false; 4765 goto out; 4766 } else { 4767 const u8 *ptr = elems->prof->variable + 4768 elems->prof->sta_info_len - 1; 4769 int bss_param_ch_cnt; 4770 4771 /* 4772 * During parsing, we validated that these fields exist, 4773 * otherwise elems->prof would have been set to NULL. 4774 */ 4775 capab_info = get_unaligned_le16(ptr); 4776 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4777 bss_param_ch_cnt = 4778 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4779 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 4780 bss_conf->bss_param_ch_cnt_link_id = link_id; 4781 4782 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4783 link_info(link, "association response status code=%u\n", 4784 assoc_data->link[link_id].status); 4785 ret = true; 4786 goto out; 4787 } 4788 } 4789 4790 if (!is_s1g && !elems->supp_rates) { 4791 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4792 ret = false; 4793 goto out; 4794 } 4795 4796 link->u.mgd.tdls_chan_switch_prohibited = 4797 elems->ext_capab && elems->ext_capab_len >= 5 && 4798 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4799 4800 /* 4801 * Some APs are erroneously not including some information in their 4802 * (re)association response frames. Try to recover by using the data 4803 * from the beacon or probe response. This seems to afflict mobile 4804 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4805 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4806 */ 4807 if (!is_6ghz && 4808 ((assoc_data->wmm && !elems->wmm_param) || 4809 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4810 (!elems->ht_cap_elem || !elems->ht_operation)) || 4811 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4812 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4813 const struct cfg80211_bss_ies *ies; 4814 struct ieee802_11_elems *bss_elems; 4815 4816 rcu_read_lock(); 4817 ies = rcu_dereference(cbss->ies); 4818 if (ies) 4819 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4820 GFP_ATOMIC); 4821 rcu_read_unlock(); 4822 if (!bss_ies) { 4823 ret = false; 4824 goto out; 4825 } 4826 4827 parse_params.start = bss_ies->data; 4828 parse_params.len = bss_ies->len; 4829 parse_params.bss = cbss; 4830 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4831 if (!bss_elems) { 4832 ret = false; 4833 goto out; 4834 } 4835 4836 if (assoc_data->wmm && 4837 !elems->wmm_param && bss_elems->wmm_param) { 4838 elems->wmm_param = bss_elems->wmm_param; 4839 sdata_info(sdata, 4840 "AP bug: WMM param missing from AssocResp\n"); 4841 } 4842 4843 /* 4844 * Also check if we requested HT/VHT, otherwise the AP doesn't 4845 * have to include the IEs in the (re)association response. 4846 */ 4847 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4848 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4849 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4850 sdata_info(sdata, 4851 "AP bug: HT capability missing from AssocResp\n"); 4852 } 4853 if (!elems->ht_operation && bss_elems->ht_operation && 4854 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4855 elems->ht_operation = bss_elems->ht_operation; 4856 sdata_info(sdata, 4857 "AP bug: HT operation missing from AssocResp\n"); 4858 } 4859 4860 if (is_5ghz) { 4861 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4862 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4863 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4864 sdata_info(sdata, 4865 "AP bug: VHT capa missing from AssocResp\n"); 4866 } 4867 4868 if (!elems->vht_operation && bss_elems->vht_operation && 4869 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4870 elems->vht_operation = bss_elems->vht_operation; 4871 sdata_info(sdata, 4872 "AP bug: VHT operation missing from AssocResp\n"); 4873 } 4874 } 4875 kfree(bss_elems); 4876 } 4877 4878 /* 4879 * We previously checked these in the beacon/probe response, so 4880 * they should be present here. This is just a safety net. 4881 * Note that the ieee80211_config_bw() below would also check 4882 * for this (and more), but this has better error reporting. 4883 */ 4884 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4885 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4886 sdata_info(sdata, 4887 "HT AP is missing WMM params or HT capability/operation\n"); 4888 ret = false; 4889 goto out; 4890 } 4891 4892 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4893 (!elems->vht_cap_elem || !elems->vht_operation)) { 4894 sdata_info(sdata, 4895 "VHT AP is missing VHT capability/operation\n"); 4896 ret = false; 4897 goto out; 4898 } 4899 4900 /* check/update if AP changed anything in assoc response vs. scan */ 4901 if (ieee80211_config_bw(link, elems, 4902 link_id == assoc_data->assoc_link_id, 4903 changed)) { 4904 ret = false; 4905 goto out; 4906 } 4907 4908 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 4909 ret = false; 4910 goto out; 4911 } 4912 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 4913 4914 /* Set up internal HT/VHT capabilities */ 4915 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 4916 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4917 elems->ht_cap_elem, 4918 link_sta); 4919 4920 if (elems->vht_cap_elem && 4921 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4922 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 4923 const struct cfg80211_bss_ies *ies; 4924 4925 /* 4926 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 4927 * too large maximum MPDU length in the association response 4928 * (indicating 12k) that it cannot actually process ... 4929 * Work around that. 4930 */ 4931 rcu_read_lock(); 4932 ies = rcu_dereference(cbss->ies); 4933 if (ies) { 4934 const struct element *elem; 4935 4936 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 4937 ies->data, ies->len); 4938 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 4939 bss_vht_cap = (const void *)elem->data; 4940 } 4941 4942 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4943 elems->vht_cap_elem, 4944 bss_vht_cap, link_sta); 4945 rcu_read_unlock(); 4946 } 4947 4948 if (elems->he_operation && 4949 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 4950 elems->he_cap) { 4951 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4952 elems->he_cap, 4953 elems->he_cap_len, 4954 elems->he_6ghz_capa, 4955 link_sta); 4956 4957 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4958 if (elems->rsnx && elems->rsnx_len && 4959 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4960 wiphy_ext_feature_isset(local->hw.wiphy, 4961 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4962 bss_conf->twt_protected = true; 4963 else 4964 bss_conf->twt_protected = false; 4965 4966 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4967 link_sta, elems); 4968 4969 if (elems->eht_operation && elems->eht_cap && 4970 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 4971 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4972 elems->he_cap, 4973 elems->he_cap_len, 4974 elems->eht_cap, 4975 elems->eht_cap_len, 4976 link_sta); 4977 4978 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4979 } else { 4980 bss_conf->eht_support = false; 4981 } 4982 } else { 4983 bss_conf->he_support = false; 4984 bss_conf->twt_requester = false; 4985 bss_conf->twt_protected = false; 4986 bss_conf->eht_support = false; 4987 } 4988 4989 bss_conf->twt_broadcast = 4990 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4991 4992 if (bss_conf->he_support) { 4993 bss_conf->he_bss_color.color = 4994 le32_get_bits(elems->he_operation->he_oper_params, 4995 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4996 bss_conf->he_bss_color.partial = 4997 le32_get_bits(elems->he_operation->he_oper_params, 4998 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4999 bss_conf->he_bss_color.enabled = 5000 !le32_get_bits(elems->he_operation->he_oper_params, 5001 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5002 5003 if (bss_conf->he_bss_color.enabled) 5004 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5005 5006 bss_conf->htc_trig_based_pkt_ext = 5007 le32_get_bits(elems->he_operation->he_oper_params, 5008 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5009 bss_conf->frame_time_rts_th = 5010 le32_get_bits(elems->he_operation->he_oper_params, 5011 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5012 5013 bss_conf->uora_exists = !!elems->uora_element; 5014 if (elems->uora_element) 5015 bss_conf->uora_ocw_range = elems->uora_element[0]; 5016 5017 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5018 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5019 /* TODO: OPEN: what happens if BSS color disable is set? */ 5020 } 5021 5022 if (cbss->transmitted_bss) { 5023 bss_conf->nontransmitted = true; 5024 ether_addr_copy(bss_conf->transmitter_bssid, 5025 cbss->transmitted_bss->bssid); 5026 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5027 bss_conf->bssid_index = cbss->bssid_index; 5028 } 5029 5030 /* 5031 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5032 * in their association response, so ignore that data for our own 5033 * configuration. If it changed since the last beacon, we'll get the 5034 * next beacon and update then. 5035 */ 5036 5037 /* 5038 * If an operating mode notification IE is present, override the 5039 * NSS calculation (that would be done in rate_control_rate_init()) 5040 * and use the # of streams from that element. 5041 */ 5042 if (elems->opmode_notif && 5043 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5044 u8 nss; 5045 5046 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5047 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5048 nss += 1; 5049 link_sta->pub->rx_nss = nss; 5050 } 5051 5052 /* 5053 * Always handle WMM once after association regardless 5054 * of the first value the AP uses. Setting -1 here has 5055 * that effect because the AP values is an unsigned 5056 * 4-bit value. 5057 */ 5058 link->u.mgd.wmm_last_param_set = -1; 5059 link->u.mgd.mu_edca_last_param_set = -1; 5060 5061 if (link->u.mgd.disable_wmm_tracking) { 5062 ieee80211_set_wmm_default(link, false, false); 5063 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5064 elems->wmm_param_len, 5065 elems->mu_edca_param_set)) { 5066 /* still enable QoS since we might have HT/VHT */ 5067 ieee80211_set_wmm_default(link, false, true); 5068 /* disable WMM tracking in this case to disable 5069 * tracking WMM parameter changes in the beacon if 5070 * the parameters weren't actually valid. Doing so 5071 * avoids changing parameters very strangely when 5072 * the AP is going back and forth between valid and 5073 * invalid parameters. 5074 */ 5075 link->u.mgd.disable_wmm_tracking = true; 5076 } 5077 5078 if (elems->max_idle_period_ie) { 5079 bss_conf->max_idle_period = 5080 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5081 bss_conf->protected_keep_alive = 5082 !!(elems->max_idle_period_ie->idle_options & 5083 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5084 *changed |= BSS_CHANGED_KEEP_ALIVE; 5085 } else { 5086 bss_conf->max_idle_period = 0; 5087 bss_conf->protected_keep_alive = false; 5088 } 5089 5090 /* set assoc capability (AID was already set earlier), 5091 * ieee80211_set_associated() will tell the driver */ 5092 bss_conf->assoc_capability = capab_info; 5093 5094 ret = true; 5095 out: 5096 kfree(elems); 5097 kfree(bss_ies); 5098 return ret; 5099 } 5100 5101 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5102 struct sta_info *sta, 5103 struct link_sta_info *link_sta, 5104 struct cfg80211_bss *cbss) 5105 { 5106 struct ieee80211_sub_if_data *sdata = link->sdata; 5107 struct ieee80211_local *local = sdata->local; 5108 struct ieee80211_bss *bss = (void *)cbss->priv; 5109 u32 rates = 0, basic_rates = 0; 5110 bool have_higher_than_11mbit = false; 5111 int min_rate = INT_MAX, min_rate_index = -1; 5112 struct ieee80211_supported_band *sband; 5113 5114 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5115 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5116 5117 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5118 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5119 ieee80211_s1g_sta_rate_init(sta); 5120 return 0; 5121 } 5122 5123 sband = local->hw.wiphy->bands[cbss->channel->band]; 5124 5125 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5126 &rates, &basic_rates, &have_higher_than_11mbit, 5127 &min_rate, &min_rate_index); 5128 5129 /* 5130 * This used to be a workaround for basic rates missing 5131 * in the association response frame. Now that we no 5132 * longer use the basic rates from there, it probably 5133 * doesn't happen any more, but keep the workaround so 5134 * in case some *other* APs are buggy in different ways 5135 * we can connect -- with a warning. 5136 * Allow this workaround only in case the AP provided at least 5137 * one rate. 5138 */ 5139 if (min_rate_index < 0) { 5140 link_info(link, "No legacy rates in association response\n"); 5141 return -EINVAL; 5142 } else if (!basic_rates) { 5143 link_info(link, "No basic rates, using min rate instead\n"); 5144 basic_rates = BIT(min_rate_index); 5145 } 5146 5147 if (rates) 5148 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5149 else 5150 link_info(link, "No rates found, keeping mandatory only\n"); 5151 5152 link->conf->basic_rates = basic_rates; 5153 5154 /* cf. IEEE 802.11 9.2.12 */ 5155 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5156 have_higher_than_11mbit; 5157 5158 return 0; 5159 } 5160 5161 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5162 struct cfg80211_bss *cbss) 5163 { 5164 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5165 const struct element *ht_cap_elem, *vht_cap_elem; 5166 const struct cfg80211_bss_ies *ies; 5167 const struct ieee80211_ht_cap *ht_cap; 5168 const struct ieee80211_vht_cap *vht_cap; 5169 const struct ieee80211_he_cap_elem *he_cap; 5170 const struct element *he_cap_elem; 5171 u16 mcs_80_map, mcs_160_map; 5172 int i, mcs_nss_size; 5173 bool support_160; 5174 u8 chains = 1; 5175 5176 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5177 return chains; 5178 5179 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5180 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5181 ht_cap = (void *)ht_cap_elem->data; 5182 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5183 /* 5184 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5185 * "Tx Unequal Modulation Supported" fields. 5186 */ 5187 } 5188 5189 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5190 return chains; 5191 5192 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5193 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5194 u8 nss; 5195 u16 tx_mcs_map; 5196 5197 vht_cap = (void *)vht_cap_elem->data; 5198 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5199 for (nss = 8; nss > 0; nss--) { 5200 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5201 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5202 break; 5203 } 5204 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5205 chains = max(chains, nss); 5206 } 5207 5208 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5209 return chains; 5210 5211 ies = rcu_dereference(cbss->ies); 5212 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5213 ies->data, ies->len); 5214 5215 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5216 return chains; 5217 5218 /* skip one byte ext_tag_id */ 5219 he_cap = (void *)(he_cap_elem->data + 1); 5220 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5221 5222 /* invalid HE IE */ 5223 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5224 return chains; 5225 5226 /* mcs_nss is right after he_cap info */ 5227 he_mcs_nss_supp = (void *)(he_cap + 1); 5228 5229 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5230 5231 for (i = 7; i >= 0; i--) { 5232 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5233 5234 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5235 chains = max_t(u8, chains, i + 1); 5236 break; 5237 } 5238 } 5239 5240 support_160 = he_cap->phy_cap_info[0] & 5241 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5242 5243 if (!support_160) 5244 return chains; 5245 5246 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5247 for (i = 7; i >= 0; i--) { 5248 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5249 5250 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5251 chains = max_t(u8, chains, i + 1); 5252 break; 5253 } 5254 } 5255 5256 return chains; 5257 } 5258 5259 static void 5260 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5261 struct ieee80211_supported_band *sband, 5262 struct cfg80211_assoc_request *req, 5263 bool wmm_used, int link_id, 5264 struct ieee80211_conn_settings *conn) 5265 { 5266 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5267 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5268 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5269 const struct ieee80211_sta_he_cap *he_cap; 5270 const struct ieee80211_sta_eht_cap *eht_cap; 5271 struct ieee80211_sta_vht_cap vht_cap; 5272 5273 if (sband->band == NL80211_BAND_S1GHZ) { 5274 conn->mode = IEEE80211_CONN_MODE_S1G; 5275 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5276 mlme_dbg(sdata, "operating as S1G STA\n"); 5277 return; 5278 } 5279 5280 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5281 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5282 5283 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5284 5285 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5286 mlme_link_id_dbg(sdata, link_id, 5287 "HT disabled by flag, limiting to legacy\n"); 5288 goto out; 5289 } 5290 5291 if (!wmm_used) { 5292 mlme_link_id_dbg(sdata, link_id, 5293 "WMM/QoS not supported, limiting to legacy\n"); 5294 goto out; 5295 } 5296 5297 if (req) { 5298 unsigned int i; 5299 5300 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5301 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5302 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5303 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5304 netdev_info(sdata->dev, 5305 "WEP/TKIP use, limiting to legacy\n"); 5306 goto out; 5307 } 5308 } 5309 } 5310 5311 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5312 mlme_link_id_dbg(sdata, link_id, 5313 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5314 goto out; 5315 } 5316 5317 /* HT is fine */ 5318 conn->mode = IEEE80211_CONN_MODE_HT; 5319 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5320 IEEE80211_CONN_BW_LIMIT_40 : 5321 IEEE80211_CONN_BW_LIMIT_20; 5322 5323 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5324 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5325 5326 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5327 mlme_link_id_dbg(sdata, link_id, 5328 "VHT disabled by flag, limiting to HT\n"); 5329 goto out; 5330 } 5331 5332 if (vht_cap.vht_supported && is_5ghz) { 5333 bool have_80mhz = false; 5334 unsigned int i; 5335 5336 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5337 mlme_link_id_dbg(sdata, link_id, 5338 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5339 goto out; 5340 } 5341 5342 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5343 for (i = 0; i < sband->n_channels; i++) { 5344 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5345 IEEE80211_CHAN_NO_80MHZ)) 5346 continue; 5347 5348 have_80mhz = true; 5349 break; 5350 } 5351 5352 if (!have_80mhz) { 5353 mlme_link_id_dbg(sdata, link_id, 5354 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5355 goto out; 5356 } 5357 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5358 mlme_link_id_dbg(sdata, link_id, 5359 "no VHT support on 5 GHz, limiting to HT\n"); 5360 goto out; 5361 } 5362 5363 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5364 if (sband->band != NL80211_BAND_2GHZ) { 5365 conn->mode = IEEE80211_CONN_MODE_VHT; 5366 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5367 } 5368 5369 if (is_5ghz && 5370 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5371 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5372 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5373 mlme_link_id_dbg(sdata, link_id, 5374 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5375 } 5376 5377 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5378 mlme_link_id_dbg(sdata, link_id, 5379 "HE disabled by flag, limiting to HT/VHT\n"); 5380 goto out; 5381 } 5382 5383 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5384 if (!he_cap) { 5385 WARN_ON(is_6ghz); 5386 mlme_link_id_dbg(sdata, link_id, 5387 "no HE support, limiting to HT/VHT\n"); 5388 goto out; 5389 } 5390 5391 /* so we have HE */ 5392 conn->mode = IEEE80211_CONN_MODE_HE; 5393 5394 /* check bandwidth */ 5395 switch (sband->band) { 5396 default: 5397 case NL80211_BAND_2GHZ: 5398 if (he_cap->he_cap_elem.phy_cap_info[0] & 5399 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5400 break; 5401 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5402 mlme_link_id_dbg(sdata, link_id, 5403 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5404 break; 5405 case NL80211_BAND_5GHZ: 5406 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5407 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5408 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5409 mlme_link_id_dbg(sdata, link_id, 5410 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5411 break; 5412 } 5413 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5414 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5415 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5416 conn->bw_limit, 5417 IEEE80211_CONN_BW_LIMIT_80); 5418 mlme_link_id_dbg(sdata, link_id, 5419 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5420 } 5421 break; 5422 case NL80211_BAND_6GHZ: 5423 if (he_cap->he_cap_elem.phy_cap_info[0] & 5424 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5425 break; 5426 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5427 conn->bw_limit, 5428 IEEE80211_CONN_BW_LIMIT_80); 5429 mlme_link_id_dbg(sdata, link_id, 5430 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5431 break; 5432 } 5433 5434 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5435 mlme_link_id_dbg(sdata, link_id, 5436 "EHT disabled by flag, limiting to HE\n"); 5437 goto out; 5438 } 5439 5440 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5441 if (!eht_cap) { 5442 mlme_link_id_dbg(sdata, link_id, 5443 "no EHT support, limiting to HE\n"); 5444 goto out; 5445 } 5446 5447 /* we have EHT */ 5448 5449 conn->mode = IEEE80211_CONN_MODE_EHT; 5450 5451 /* check bandwidth */ 5452 if (is_6ghz && 5453 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5454 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5455 else if (is_6ghz) 5456 mlme_link_id_dbg(sdata, link_id, 5457 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5458 5459 out: 5460 mlme_link_id_dbg(sdata, link_id, 5461 "determined local STA to be %s, BW limited to %d MHz\n", 5462 ieee80211_conn_mode_str(conn->mode), 5463 20 * (1 << conn->bw_limit)); 5464 } 5465 5466 static void 5467 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5468 struct ieee80211_supported_band *sband, 5469 struct cfg80211_auth_request *req, 5470 bool wmm_used, 5471 struct ieee80211_conn_settings *conn) 5472 { 5473 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5474 req->link_id > 0 ? req->link_id : 0, 5475 conn); 5476 } 5477 5478 static void 5479 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5480 struct ieee80211_supported_band *sband, 5481 struct cfg80211_assoc_request *req, 5482 bool wmm_used, int link_id, 5483 struct ieee80211_conn_settings *conn) 5484 { 5485 struct ieee80211_conn_settings tmp; 5486 5487 WARN_ON(!req); 5488 5489 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5490 &tmp); 5491 5492 conn->mode = min_t(enum ieee80211_conn_mode, 5493 conn->mode, tmp.mode); 5494 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5495 conn->bw_limit, tmp.bw_limit); 5496 } 5497 5498 static enum ieee80211_ap_reg_power 5499 ieee80211_ap_power_type(u8 control) 5500 { 5501 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 5502 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 5503 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 5504 return IEEE80211_REG_LPI_AP; 5505 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 5506 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 5507 return IEEE80211_REG_SP_AP; 5508 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 5509 return IEEE80211_REG_VLP_AP; 5510 default: 5511 return IEEE80211_REG_UNSET_AP; 5512 } 5513 } 5514 5515 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5516 struct ieee80211_link_data *link, 5517 int link_id, 5518 struct cfg80211_bss *cbss, bool mlo, 5519 struct ieee80211_conn_settings *conn) 5520 { 5521 struct ieee80211_local *local = sdata->local; 5522 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5523 struct ieee80211_chan_req chanreq = {}; 5524 struct cfg80211_chan_def ap_chandef; 5525 struct ieee802_11_elems *elems; 5526 int ret; 5527 5528 lockdep_assert_wiphy(local->hw.wiphy); 5529 5530 rcu_read_lock(); 5531 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 5532 &chanreq, &ap_chandef); 5533 5534 if (IS_ERR(elems)) { 5535 rcu_read_unlock(); 5536 return PTR_ERR(elems); 5537 } 5538 5539 if (mlo && !elems->ml_basic) { 5540 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5541 rcu_read_unlock(); 5542 kfree(elems); 5543 return -EINVAL; 5544 } 5545 5546 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 5547 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 5548 5549 if (elems->pwr_constr_elem) 5550 link->conf->pwr_reduction = *elems->pwr_constr_elem; 5551 5552 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 5553 if (he_6ghz_oper) 5554 link->conf->power_type = 5555 ieee80211_ap_power_type(he_6ghz_oper->control); 5556 else 5557 link_info(link, 5558 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 5559 cbss->channel->center_freq); 5560 5561 link->conf->tpe = elems->tpe; 5562 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 5563 &chanreq.oper); 5564 } 5565 rcu_read_unlock(); 5566 /* the element data was RCU protected so no longer valid anyway */ 5567 kfree(elems); 5568 elems = NULL; 5569 5570 if (!link) 5571 return 0; 5572 5573 rcu_read_lock(); 5574 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 5575 local->rx_chains); 5576 rcu_read_unlock(); 5577 5578 /* 5579 * If this fails (possibly due to channel context sharing 5580 * on incompatible channels, e.g. 80+80 and 160 sharing the 5581 * same control channel) try to use a smaller bandwidth. 5582 */ 5583 ret = ieee80211_link_use_channel(link, &chanreq, 5584 IEEE80211_CHANCTX_SHARED); 5585 5586 /* don't downgrade for 5 and 10 MHz channels, though. */ 5587 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 5588 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 5589 return ret; 5590 5591 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 5592 ieee80211_chanreq_downgrade(&chanreq, conn); 5593 5594 ret = ieee80211_link_use_channel(link, &chanreq, 5595 IEEE80211_CHANCTX_SHARED); 5596 } 5597 5598 return ret; 5599 } 5600 5601 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5602 u8 *dtim_count, u8 *dtim_period) 5603 { 5604 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5605 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5606 ies->len); 5607 const struct ieee80211_tim_ie *tim = NULL; 5608 const struct ieee80211_bssid_index *idx; 5609 bool valid = tim_ie && tim_ie[1] >= 2; 5610 5611 if (valid) 5612 tim = (void *)(tim_ie + 2); 5613 5614 if (dtim_count) 5615 *dtim_count = valid ? tim->dtim_count : 0; 5616 5617 if (dtim_period) 5618 *dtim_period = valid ? tim->dtim_period : 0; 5619 5620 /* Check if value is overridden by non-transmitted profile */ 5621 if (!idx_ie || idx_ie[1] < 3) 5622 return valid; 5623 5624 idx = (void *)(idx_ie + 2); 5625 5626 if (dtim_count) 5627 *dtim_count = idx->dtim_count; 5628 5629 if (dtim_period) 5630 *dtim_period = idx->dtim_period; 5631 5632 return true; 5633 } 5634 5635 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5636 struct ieee80211_mgmt *mgmt, 5637 struct ieee802_11_elems *elems, 5638 const u8 *elem_start, unsigned int elem_len) 5639 { 5640 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5641 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5642 struct ieee80211_local *local = sdata->local; 5643 unsigned int link_id; 5644 struct sta_info *sta; 5645 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5646 u16 valid_links = 0, dormant_links = 0; 5647 int err; 5648 5649 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5650 /* 5651 * station info was already allocated and inserted before 5652 * the association and should be available to us 5653 */ 5654 sta = sta_info_get(sdata, assoc_data->ap_addr); 5655 if (WARN_ON(!sta)) 5656 goto out_err; 5657 5658 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 5659 5660 if (ieee80211_vif_is_mld(&sdata->vif)) { 5661 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5662 if (!assoc_data->link[link_id].bss) 5663 continue; 5664 5665 valid_links |= BIT(link_id); 5666 if (assoc_data->link[link_id].disabled) 5667 dormant_links |= BIT(link_id); 5668 5669 if (link_id != assoc_data->assoc_link_id) { 5670 err = ieee80211_sta_allocate_link(sta, link_id); 5671 if (err) 5672 goto out_err; 5673 } 5674 } 5675 5676 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5677 } 5678 5679 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5680 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5681 struct ieee80211_link_data *link; 5682 struct link_sta_info *link_sta; 5683 5684 if (!cbss) 5685 continue; 5686 5687 link = sdata_dereference(sdata->link[link_id], sdata); 5688 if (WARN_ON(!link)) 5689 goto out_err; 5690 5691 if (ieee80211_vif_is_mld(&sdata->vif)) 5692 link_info(link, 5693 "local address %pM, AP link address %pM%s\n", 5694 link->conf->addr, 5695 assoc_data->link[link_id].bss->bssid, 5696 link_id == assoc_data->assoc_link_id ? 5697 " (assoc)" : ""); 5698 5699 link_sta = rcu_dereference_protected(sta->link[link_id], 5700 lockdep_is_held(&local->hw.wiphy->mtx)); 5701 if (WARN_ON(!link_sta)) 5702 goto out_err; 5703 5704 if (!link->u.mgd.have_beacon) { 5705 const struct cfg80211_bss_ies *ies; 5706 5707 rcu_read_lock(); 5708 ies = rcu_dereference(cbss->beacon_ies); 5709 if (ies) 5710 link->u.mgd.have_beacon = true; 5711 else 5712 ies = rcu_dereference(cbss->ies); 5713 ieee80211_get_dtim(ies, 5714 &link->conf->sync_dtim_count, 5715 &link->u.mgd.dtim_period); 5716 link->conf->beacon_int = cbss->beacon_interval; 5717 rcu_read_unlock(); 5718 } 5719 5720 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5721 5722 if (link_id != assoc_data->assoc_link_id) { 5723 link->u.mgd.conn = assoc_data->link[link_id].conn; 5724 5725 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 5726 true, &link->u.mgd.conn); 5727 if (err) { 5728 link_info(link, "prep_channel failed\n"); 5729 goto out_err; 5730 } 5731 } 5732 5733 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5734 assoc_data->link[link_id].bss); 5735 if (err) 5736 goto out_err; 5737 5738 if (!ieee80211_assoc_config_link(link, link_sta, 5739 assoc_data->link[link_id].bss, 5740 mgmt, elem_start, elem_len, 5741 &changed[link_id])) 5742 goto out_err; 5743 5744 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5745 valid_links &= ~BIT(link_id); 5746 ieee80211_sta_remove_link(sta, link_id); 5747 continue; 5748 } 5749 5750 if (link_id != assoc_data->assoc_link_id) { 5751 err = ieee80211_sta_activate_link(sta, link_id); 5752 if (err) 5753 goto out_err; 5754 } 5755 } 5756 5757 /* links might have changed due to rejected ones, set them again */ 5758 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5759 5760 rate_control_rate_init_all_links(sta); 5761 5762 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5763 set_sta_flag(sta, WLAN_STA_MFP); 5764 sta->sta.mfp = true; 5765 } else { 5766 sta->sta.mfp = false; 5767 } 5768 5769 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5770 elems->ext_capab_len); 5771 5772 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5773 local->hw.queues >= IEEE80211_NUM_ACS; 5774 5775 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5776 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5777 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5778 if (err) { 5779 sdata_info(sdata, 5780 "failed to move station %pM to desired state\n", 5781 sta->sta.addr); 5782 WARN_ON(__sta_info_destroy(sta)); 5783 goto out_err; 5784 } 5785 5786 if (sdata->wdev.use_4addr) 5787 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5788 5789 ieee80211_set_associated(sdata, assoc_data, changed); 5790 5791 /* 5792 * If we're using 4-addr mode, let the AP know that we're 5793 * doing so, so that it can create the STA VLAN on its side 5794 */ 5795 if (ifmgd->use_4addr) 5796 ieee80211_send_4addr_nullfunc(local, sdata); 5797 5798 /* 5799 * Start timer to probe the connection to the AP now. 5800 * Also start the timer that will detect beacon loss. 5801 */ 5802 ieee80211_sta_reset_beacon_monitor(sdata); 5803 ieee80211_sta_reset_conn_monitor(sdata); 5804 5805 return true; 5806 out_err: 5807 eth_zero_addr(sdata->vif.cfg.ap_addr); 5808 return false; 5809 } 5810 5811 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5812 struct ieee80211_mgmt *mgmt, 5813 size_t len) 5814 { 5815 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5816 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5817 u16 capab_info, status_code, aid; 5818 struct ieee80211_elems_parse_params parse_params = { 5819 .bss = NULL, 5820 .link_id = -1, 5821 .from_ap = true, 5822 }; 5823 struct ieee802_11_elems *elems; 5824 int ac; 5825 const u8 *elem_start; 5826 unsigned int elem_len; 5827 bool reassoc; 5828 struct ieee80211_event event = { 5829 .type = MLME_EVENT, 5830 .u.mlme.data = ASSOC_EVENT, 5831 }; 5832 struct ieee80211_prep_tx_info info = {}; 5833 struct cfg80211_rx_assoc_resp_data resp = { 5834 .uapsd_queues = -1, 5835 }; 5836 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5837 unsigned int link_id; 5838 5839 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5840 5841 if (!assoc_data) 5842 return; 5843 5844 parse_params.mode = 5845 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 5846 5847 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5848 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5849 return; 5850 5851 /* 5852 * AssocResp and ReassocResp have identical structure, so process both 5853 * of them in this function. 5854 */ 5855 5856 if (len < 24 + 6) 5857 return; 5858 5859 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5860 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5861 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5862 if (assoc_data->s1g) 5863 elem_start = mgmt->u.s1g_assoc_resp.variable; 5864 else 5865 elem_start = mgmt->u.assoc_resp.variable; 5866 5867 /* 5868 * Note: this may not be perfect, AP might misbehave - if 5869 * anyone needs to rely on perfect complete notification 5870 * with the exact right subtype, then we need to track what 5871 * we actually transmitted. 5872 */ 5873 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5874 IEEE80211_STYPE_ASSOC_REQ; 5875 5876 if (assoc_data->fils_kek_len && 5877 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5878 return; 5879 5880 elem_len = len - (elem_start - (u8 *)mgmt); 5881 parse_params.start = elem_start; 5882 parse_params.len = elem_len; 5883 elems = ieee802_11_parse_elems_full(&parse_params); 5884 if (!elems) 5885 goto notify_driver; 5886 5887 if (elems->aid_resp) 5888 aid = le16_to_cpu(elems->aid_resp->aid); 5889 else if (assoc_data->s1g) 5890 aid = 0; /* TODO */ 5891 else 5892 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5893 5894 /* 5895 * The 5 MSB of the AID field are reserved 5896 * (802.11-2016 9.4.1.8 AID field) 5897 */ 5898 aid &= 0x7ff; 5899 5900 sdata_info(sdata, 5901 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5902 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5903 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5904 5905 ifmgd->broken_ap = false; 5906 5907 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5908 elems->timeout_int && 5909 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5910 u32 tu, ms; 5911 5912 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5913 le32_to_cpu(elems->timeout_int->value)); 5914 5915 tu = le32_to_cpu(elems->timeout_int->value); 5916 ms = tu * 1024 / 1000; 5917 sdata_info(sdata, 5918 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5919 assoc_data->ap_addr, tu, ms); 5920 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5921 assoc_data->timeout_started = true; 5922 assoc_data->comeback = true; 5923 if (ms > IEEE80211_ASSOC_TIMEOUT) 5924 run_again(sdata, assoc_data->timeout); 5925 goto notify_driver; 5926 } 5927 5928 if (status_code != WLAN_STATUS_SUCCESS) { 5929 sdata_info(sdata, "%pM denied association (code=%d)\n", 5930 assoc_data->ap_addr, status_code); 5931 event.u.mlme.status = MLME_DENIED; 5932 event.u.mlme.reason = status_code; 5933 drv_event_callback(sdata->local, sdata, &event); 5934 } else { 5935 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5936 sdata_info(sdata, 5937 "invalid AID value %d (out of range), turn off PS\n", 5938 aid); 5939 aid = 0; 5940 ifmgd->broken_ap = true; 5941 } 5942 5943 if (ieee80211_vif_is_mld(&sdata->vif)) { 5944 struct ieee80211_mle_basic_common_info *common; 5945 5946 if (!elems->ml_basic) { 5947 sdata_info(sdata, 5948 "MLO association with %pM but no (basic) multi-link element in response!\n", 5949 assoc_data->ap_addr); 5950 goto abandon_assoc; 5951 } 5952 5953 common = (void *)elems->ml_basic->variable; 5954 5955 if (memcmp(assoc_data->ap_addr, 5956 common->mld_mac_addr, ETH_ALEN)) { 5957 sdata_info(sdata, 5958 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5959 common->mld_mac_addr, 5960 assoc_data->ap_addr); 5961 goto abandon_assoc; 5962 } 5963 5964 sdata->vif.cfg.eml_cap = 5965 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 5966 sdata->vif.cfg.eml_med_sync_delay = 5967 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 5968 sdata->vif.cfg.mld_capa_op = 5969 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 5970 } 5971 5972 sdata->vif.cfg.aid = aid; 5973 5974 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5975 elem_start, elem_len)) { 5976 /* oops -- internal error -- send timeout for now */ 5977 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5978 goto notify_driver; 5979 } 5980 event.u.mlme.status = MLME_SUCCESS; 5981 drv_event_callback(sdata->local, sdata, &event); 5982 sdata_info(sdata, "associated\n"); 5983 5984 info.success = 1; 5985 } 5986 5987 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5988 struct ieee80211_link_data *link; 5989 5990 if (!assoc_data->link[link_id].bss) 5991 continue; 5992 5993 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5994 ether_addr_copy(resp.links[link_id].addr, 5995 assoc_data->link[link_id].addr); 5996 resp.links[link_id].status = assoc_data->link[link_id].status; 5997 5998 link = sdata_dereference(sdata->link[link_id], sdata); 5999 if (!link) 6000 continue; 6001 6002 /* get uapsd queues configuration - same for all links */ 6003 resp.uapsd_queues = 0; 6004 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6005 if (link->tx_conf[ac].uapsd) 6006 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6007 } 6008 6009 if (ieee80211_vif_is_mld(&sdata->vif)) { 6010 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6011 resp.ap_mld_addr = ap_mld_addr; 6012 } 6013 6014 ieee80211_destroy_assoc_data(sdata, 6015 status_code == WLAN_STATUS_SUCCESS ? 6016 ASSOC_SUCCESS : 6017 ASSOC_REJECTED); 6018 6019 resp.buf = (u8 *)mgmt; 6020 resp.len = len; 6021 resp.req_ies = ifmgd->assoc_req_ies; 6022 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6023 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6024 notify_driver: 6025 drv_mgd_complete_tx(sdata->local, sdata, &info); 6026 kfree(elems); 6027 return; 6028 abandon_assoc: 6029 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6030 goto notify_driver; 6031 } 6032 6033 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6034 struct ieee80211_mgmt *mgmt, size_t len, 6035 struct ieee80211_rx_status *rx_status) 6036 { 6037 struct ieee80211_sub_if_data *sdata = link->sdata; 6038 struct ieee80211_local *local = sdata->local; 6039 struct ieee80211_bss *bss; 6040 struct ieee80211_channel *channel; 6041 6042 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6043 6044 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6045 ieee80211_rx_status_to_khz(rx_status)); 6046 if (!channel) 6047 return; 6048 6049 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6050 if (bss) { 6051 link->conf->beacon_rate = bss->beacon_rate; 6052 ieee80211_rx_bss_put(local, bss); 6053 } 6054 } 6055 6056 6057 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6058 struct sk_buff *skb) 6059 { 6060 struct ieee80211_sub_if_data *sdata = link->sdata; 6061 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6062 struct ieee80211_if_managed *ifmgd; 6063 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6064 struct ieee80211_channel *channel; 6065 size_t baselen, len = skb->len; 6066 6067 ifmgd = &sdata->u.mgd; 6068 6069 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6070 6071 /* 6072 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6073 * "If a 6 GHz AP receives a Probe Request frame and responds with 6074 * a Probe Response frame [..], the Address 1 field of the Probe 6075 * Response frame shall be set to the broadcast address [..]" 6076 * So, on 6GHz band we should also accept broadcast responses. 6077 */ 6078 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 6079 rx_status->freq); 6080 if (!channel) 6081 return; 6082 6083 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6084 (channel->band != NL80211_BAND_6GHZ || 6085 !is_broadcast_ether_addr(mgmt->da))) 6086 return; /* ignore ProbeResp to foreign address */ 6087 6088 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6089 if (baselen > len) 6090 return; 6091 6092 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6093 6094 if (ifmgd->associated && 6095 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6096 ieee80211_reset_ap_probe(sdata); 6097 } 6098 6099 /* 6100 * This is the canonical list of information elements we care about, 6101 * the filter code also gives us all changes to the Microsoft OUI 6102 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6103 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6104 * changes to requested client power. 6105 * 6106 * We implement beacon filtering in software since that means we can 6107 * avoid processing the frame here and in cfg80211, and userspace 6108 * will not be able to tell whether the hardware supports it or not. 6109 * 6110 * XXX: This list needs to be dynamic -- userspace needs to be able to 6111 * add items it requires. It also needs to be able to tell us to 6112 * look out for other vendor IEs. 6113 */ 6114 static const u64 care_about_ies = 6115 (1ULL << WLAN_EID_COUNTRY) | 6116 (1ULL << WLAN_EID_ERP_INFO) | 6117 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6118 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6119 (1ULL << WLAN_EID_HT_CAPABILITY) | 6120 (1ULL << WLAN_EID_HT_OPERATION) | 6121 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6122 6123 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6124 struct ieee80211_if_managed *ifmgd, 6125 struct ieee80211_bss_conf *bss_conf, 6126 struct ieee80211_local *local, 6127 struct ieee80211_rx_status *rx_status) 6128 { 6129 struct ieee80211_sub_if_data *sdata = link->sdata; 6130 6131 /* Track average RSSI from the Beacon frames of the current AP */ 6132 6133 if (!link->u.mgd.tracking_signal_avg) { 6134 link->u.mgd.tracking_signal_avg = true; 6135 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6136 link->u.mgd.last_cqm_event_signal = 0; 6137 link->u.mgd.count_beacon_signal = 1; 6138 link->u.mgd.last_ave_beacon_signal = 0; 6139 } else { 6140 link->u.mgd.count_beacon_signal++; 6141 } 6142 6143 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6144 -rx_status->signal); 6145 6146 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6147 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6148 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6149 int last_sig = link->u.mgd.last_ave_beacon_signal; 6150 struct ieee80211_event event = { 6151 .type = RSSI_EVENT, 6152 }; 6153 6154 /* 6155 * if signal crosses either of the boundaries, invoke callback 6156 * with appropriate parameters 6157 */ 6158 if (sig > ifmgd->rssi_max_thold && 6159 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6160 link->u.mgd.last_ave_beacon_signal = sig; 6161 event.u.rssi.data = RSSI_EVENT_HIGH; 6162 drv_event_callback(local, sdata, &event); 6163 } else if (sig < ifmgd->rssi_min_thold && 6164 (last_sig >= ifmgd->rssi_max_thold || 6165 last_sig == 0)) { 6166 link->u.mgd.last_ave_beacon_signal = sig; 6167 event.u.rssi.data = RSSI_EVENT_LOW; 6168 drv_event_callback(local, sdata, &event); 6169 } 6170 } 6171 6172 if (bss_conf->cqm_rssi_thold && 6173 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6174 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6175 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6176 int last_event = link->u.mgd.last_cqm_event_signal; 6177 int thold = bss_conf->cqm_rssi_thold; 6178 int hyst = bss_conf->cqm_rssi_hyst; 6179 6180 if (sig < thold && 6181 (last_event == 0 || sig < last_event - hyst)) { 6182 link->u.mgd.last_cqm_event_signal = sig; 6183 ieee80211_cqm_rssi_notify( 6184 &sdata->vif, 6185 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6186 sig, GFP_KERNEL); 6187 } else if (sig > thold && 6188 (last_event == 0 || sig > last_event + hyst)) { 6189 link->u.mgd.last_cqm_event_signal = sig; 6190 ieee80211_cqm_rssi_notify( 6191 &sdata->vif, 6192 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6193 sig, GFP_KERNEL); 6194 } 6195 } 6196 6197 if (bss_conf->cqm_rssi_low && 6198 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6199 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6200 int last_event = link->u.mgd.last_cqm_event_signal; 6201 int low = bss_conf->cqm_rssi_low; 6202 int high = bss_conf->cqm_rssi_high; 6203 6204 if (sig < low && 6205 (last_event == 0 || last_event >= low)) { 6206 link->u.mgd.last_cqm_event_signal = sig; 6207 ieee80211_cqm_rssi_notify( 6208 &sdata->vif, 6209 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6210 sig, GFP_KERNEL); 6211 } else if (sig > high && 6212 (last_event == 0 || last_event <= high)) { 6213 link->u.mgd.last_cqm_event_signal = sig; 6214 ieee80211_cqm_rssi_notify( 6215 &sdata->vif, 6216 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6217 sig, GFP_KERNEL); 6218 } 6219 } 6220 } 6221 6222 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6223 struct cfg80211_bss *bss) 6224 { 6225 if (ether_addr_equal(tx_bssid, bss->bssid)) 6226 return true; 6227 if (!bss->transmitted_bss) 6228 return false; 6229 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6230 } 6231 6232 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6233 struct wiphy_work *work) 6234 { 6235 struct ieee80211_sub_if_data *sdata = 6236 container_of(work, struct ieee80211_sub_if_data, 6237 u.mgd.ml_reconf_work.work); 6238 u16 new_valid_links, new_active_links, new_dormant_links; 6239 int ret; 6240 6241 if (!sdata->u.mgd.removed_links) 6242 return; 6243 6244 sdata_info(sdata, 6245 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6246 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6247 6248 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6249 if (new_valid_links == sdata->vif.valid_links) 6250 return; 6251 6252 if (!new_valid_links || 6253 !(new_valid_links & ~sdata->vif.dormant_links)) { 6254 sdata_info(sdata, "No valid links after reconfiguration\n"); 6255 ret = -EINVAL; 6256 goto out; 6257 } 6258 6259 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6260 if (new_active_links != sdata->vif.active_links) { 6261 if (!new_active_links) 6262 new_active_links = 6263 BIT(ffs(new_valid_links & 6264 ~sdata->vif.dormant_links) - 1); 6265 6266 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6267 if (ret) { 6268 sdata_info(sdata, 6269 "Failed setting active links\n"); 6270 goto out; 6271 } 6272 } 6273 6274 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6275 6276 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6277 new_dormant_links); 6278 if (ret) 6279 sdata_info(sdata, "Failed setting valid links\n"); 6280 6281 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6282 6283 out: 6284 if (!ret) 6285 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6286 else 6287 __ieee80211_disconnect(sdata); 6288 6289 sdata->u.mgd.removed_links = 0; 6290 } 6291 6292 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6293 struct ieee802_11_elems *elems) 6294 { 6295 const struct element *sub; 6296 unsigned long removed_links = 0; 6297 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6298 u8 link_id; 6299 u32 delay; 6300 6301 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6302 return; 6303 6304 /* Directly parse the sub elements as the common information doesn't 6305 * hold any useful information. 6306 */ 6307 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6308 elems->ml_reconf_len) { 6309 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6310 u8 *pos = prof->variable; 6311 u16 control; 6312 6313 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6314 continue; 6315 6316 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6317 sub->datalen)) 6318 return; 6319 6320 control = le16_to_cpu(prof->control); 6321 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6322 6323 removed_links |= BIT(link_id); 6324 6325 /* the MAC address should not be included, but handle it */ 6326 if (control & 6327 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6328 pos += 6; 6329 6330 /* According to Draft P802.11be_D3.0, the control should 6331 * include the AP Removal Timer present. If the AP Removal Timer 6332 * is not present assume immediate removal. 6333 */ 6334 if (control & 6335 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6336 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6337 } 6338 6339 removed_links &= sdata->vif.valid_links; 6340 if (!removed_links) { 6341 /* In case the removal was cancelled, abort it */ 6342 if (sdata->u.mgd.removed_links) { 6343 sdata->u.mgd.removed_links = 0; 6344 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6345 &sdata->u.mgd.ml_reconf_work); 6346 } 6347 return; 6348 } 6349 6350 delay = 0; 6351 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6352 struct ieee80211_bss_conf *link_conf = 6353 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6354 u32 link_delay; 6355 6356 if (!link_conf) { 6357 removed_links &= ~BIT(link_id); 6358 continue; 6359 } 6360 6361 if (link_removal_timeout[link_id] < 1) 6362 link_delay = 0; 6363 else 6364 link_delay = link_conf->beacon_int * 6365 (link_removal_timeout[link_id] - 1); 6366 6367 if (!delay) 6368 delay = link_delay; 6369 else 6370 delay = min(delay, link_delay); 6371 } 6372 6373 sdata->u.mgd.removed_links = removed_links; 6374 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6375 &sdata->u.mgd.ml_reconf_work, 6376 TU_TO_JIFFIES(delay)); 6377 } 6378 6379 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6380 u16 active_links, u16 dormant_links, 6381 u16 suspended_links) 6382 { 6383 u64 changed = 0; 6384 int ret; 6385 6386 if (!active_links) { 6387 ret = -EINVAL; 6388 goto out; 6389 } 6390 6391 /* If there is an active negotiated TTLM, it should be discarded by 6392 * the new negotiated/advertised TTLM. 6393 */ 6394 if (sdata->vif.neg_ttlm.valid) { 6395 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6396 sdata->vif.suspended_links = 0; 6397 changed = BSS_CHANGED_MLD_TTLM; 6398 } 6399 6400 if (sdata->vif.active_links != active_links) { 6401 /* usable links are affected when active_links are changed, 6402 * so notify the driver about the status change 6403 */ 6404 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6405 active_links &= sdata->vif.active_links; 6406 if (!active_links) 6407 active_links = 6408 BIT(__ffs(sdata->vif.valid_links & 6409 ~dormant_links)); 6410 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6411 if (ret) { 6412 sdata_info(sdata, "Failed to set TTLM active links\n"); 6413 goto out; 6414 } 6415 } 6416 6417 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6418 dormant_links); 6419 if (ret) { 6420 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6421 goto out; 6422 } 6423 6424 sdata->vif.suspended_links = suspended_links; 6425 if (sdata->vif.suspended_links) 6426 changed |= BSS_CHANGED_MLD_TTLM; 6427 6428 ieee80211_vif_cfg_change_notify(sdata, changed); 6429 6430 out: 6431 if (ret) 6432 ieee80211_disconnect(&sdata->vif, false); 6433 6434 return ret; 6435 } 6436 6437 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6438 struct wiphy_work *work) 6439 { 6440 u16 new_active_links, new_dormant_links; 6441 struct ieee80211_sub_if_data *sdata = 6442 container_of(work, struct ieee80211_sub_if_data, 6443 u.mgd.ttlm_work.work); 6444 6445 new_active_links = sdata->u.mgd.ttlm_info.map & 6446 sdata->vif.valid_links; 6447 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6448 sdata->vif.valid_links; 6449 6450 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6451 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6452 0)) 6453 return; 6454 6455 sdata->u.mgd.ttlm_info.active = true; 6456 sdata->u.mgd.ttlm_info.switch_time = 0; 6457 } 6458 6459 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6460 { 6461 if (bm_size == 1) 6462 return *data; 6463 else 6464 return get_unaligned_le16(data); 6465 } 6466 6467 static int 6468 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6469 const struct ieee80211_ttlm_elem *ttlm, 6470 struct ieee80211_adv_ttlm_info *ttlm_info) 6471 { 6472 /* The element size was already validated in 6473 * ieee80211_tid_to_link_map_size_ok() 6474 */ 6475 u8 control, link_map_presence, map_size, tid; 6476 u8 *pos; 6477 6478 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6479 pos = (void *)ttlm->optional; 6480 control = ttlm->control; 6481 6482 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 6483 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 6484 return 0; 6485 6486 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6487 IEEE80211_TTLM_DIRECTION_BOTH) { 6488 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6489 return -EINVAL; 6490 } 6491 6492 link_map_presence = *pos; 6493 pos++; 6494 6495 ttlm_info->switch_time = get_unaligned_le16(pos); 6496 6497 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 6498 * by 1. 6499 */ 6500 if (!ttlm_info->switch_time) 6501 ttlm_info->switch_time = 1; 6502 6503 pos += 2; 6504 6505 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6506 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6507 pos += 3; 6508 } 6509 6510 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6511 map_size = 1; 6512 else 6513 map_size = 2; 6514 6515 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6516 * not advertise a TID-to-link mapping that does not map all TIDs to the 6517 * same link set, reject frame if not all links have mapping 6518 */ 6519 if (link_map_presence != 0xff) { 6520 sdata_info(sdata, 6521 "Invalid advertised T2L mapping presence indicator\n"); 6522 return -EINVAL; 6523 } 6524 6525 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6526 if (!ttlm_info->map) { 6527 sdata_info(sdata, 6528 "Invalid advertised T2L map for TID 0\n"); 6529 return -EINVAL; 6530 } 6531 6532 pos += map_size; 6533 6534 for (tid = 1; tid < 8; tid++) { 6535 u16 map = ieee80211_get_ttlm(map_size, pos); 6536 6537 if (map != ttlm_info->map) { 6538 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6539 tid); 6540 return -EINVAL; 6541 } 6542 6543 pos += map_size; 6544 } 6545 return 0; 6546 } 6547 6548 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6549 struct ieee802_11_elems *elems, 6550 u64 beacon_ts) 6551 { 6552 u8 i; 6553 int ret; 6554 6555 if (!ieee80211_vif_is_mld(&sdata->vif)) 6556 return; 6557 6558 if (!elems->ttlm_num) { 6559 if (sdata->u.mgd.ttlm_info.switch_time) { 6560 /* if a planned TID-to-link mapping was cancelled - 6561 * abort it 6562 */ 6563 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6564 &sdata->u.mgd.ttlm_work); 6565 } else if (sdata->u.mgd.ttlm_info.active) { 6566 /* if no TID-to-link element, set to default mapping in 6567 * which all TIDs are mapped to all setup links 6568 */ 6569 ret = ieee80211_vif_set_links(sdata, 6570 sdata->vif.valid_links, 6571 0); 6572 if (ret) { 6573 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6574 return; 6575 } 6576 ieee80211_vif_cfg_change_notify(sdata, 6577 BSS_CHANGED_MLD_VALID_LINKS); 6578 } 6579 memset(&sdata->u.mgd.ttlm_info, 0, 6580 sizeof(sdata->u.mgd.ttlm_info)); 6581 return; 6582 } 6583 6584 for (i = 0; i < elems->ttlm_num; i++) { 6585 struct ieee80211_adv_ttlm_info ttlm_info; 6586 u32 res; 6587 6588 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6589 &ttlm_info); 6590 6591 if (res) { 6592 __ieee80211_disconnect(sdata); 6593 return; 6594 } 6595 6596 if (ttlm_info.switch_time) { 6597 u16 beacon_ts_tu, st_tu, delay; 6598 u32 delay_jiffies; 6599 u64 mask; 6600 6601 /* The t2l map switch time is indicated with a partial 6602 * TSF value (bits 10 to 25), get the partial beacon TS 6603 * as well, and calc the delay to the start time. 6604 */ 6605 mask = GENMASK_ULL(25, 10); 6606 beacon_ts_tu = (beacon_ts & mask) >> 10; 6607 st_tu = ttlm_info.switch_time; 6608 delay = st_tu - beacon_ts_tu; 6609 6610 /* 6611 * If the switch time is far in the future, then it 6612 * could also be the previous switch still being 6613 * announced. 6614 * We can simply ignore it for now, if it is a future 6615 * switch the AP will continue to announce it anyway. 6616 */ 6617 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 6618 return; 6619 6620 delay_jiffies = TU_TO_JIFFIES(delay); 6621 6622 /* Link switching can take time, so schedule it 6623 * 100ms before to be ready on time 6624 */ 6625 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 6626 delay_jiffies -= 6627 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 6628 else 6629 delay_jiffies = 0; 6630 6631 sdata->u.mgd.ttlm_info = ttlm_info; 6632 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6633 &sdata->u.mgd.ttlm_work); 6634 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6635 &sdata->u.mgd.ttlm_work, 6636 delay_jiffies); 6637 return; 6638 } 6639 } 6640 } 6641 6642 static void 6643 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 6644 int reporting_link_id, 6645 struct ieee802_11_elems *elems) 6646 { 6647 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6648 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6649 const struct element *sub; 6650 const u8 *subelems; 6651 size_t subelems_len; 6652 u8 common_size; 6653 int link_id; 6654 6655 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 6656 return; 6657 6658 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 6659 subelems = (u8 *)elems->ml_basic + common_size; 6660 subelems_len = elems->ml_basic_len - common_size; 6661 6662 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 6663 subelems, subelems_len) { 6664 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6665 struct ieee80211_link_data *link; 6666 ssize_t len; 6667 6668 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 6669 sub->datalen)) 6670 continue; 6671 6672 link_id = le16_get_bits(prof->control, 6673 IEEE80211_MLE_STA_CONTROL_LINK_ID); 6674 /* need a valid link ID, but also not our own, both AP bugs */ 6675 if (link_id == reporting_link_id || 6676 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 6677 continue; 6678 6679 link = sdata_dereference(sdata->link[link_id], sdata); 6680 if (!link) 6681 continue; 6682 6683 len = cfg80211_defragment_element(sub, subelems, subelems_len, 6684 NULL, 0, 6685 IEEE80211_MLE_SUBELEM_FRAGMENT); 6686 if (WARN_ON(len < 0)) 6687 continue; 6688 6689 sta_profiles[link_id] = sub; 6690 sta_profiles_len[link_id] = len; 6691 } 6692 6693 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6694 struct ieee80211_mle_per_sta_profile *prof; 6695 struct ieee802_11_elems *prof_elems; 6696 struct ieee80211_link_data *link; 6697 ssize_t len; 6698 6699 if (link_id == reporting_link_id) 6700 continue; 6701 6702 link = sdata_dereference(sdata->link[link_id], sdata); 6703 if (!link) 6704 continue; 6705 6706 if (!sta_profiles[link_id]) { 6707 prof_elems = NULL; 6708 goto handle; 6709 } 6710 6711 /* we can defragment in-place, won't use the buffer again */ 6712 len = cfg80211_defragment_element(sta_profiles[link_id], 6713 subelems, subelems_len, 6714 (void *)sta_profiles[link_id], 6715 sta_profiles_len[link_id], 6716 IEEE80211_MLE_SUBELEM_FRAGMENT); 6717 if (WARN_ON(len != sta_profiles_len[link_id])) 6718 continue; 6719 6720 prof = (void *)sta_profiles[link_id]; 6721 prof_elems = ieee802_11_parse_elems(prof->variable + 6722 (prof->sta_info_len - 1), 6723 len - 6724 (prof->sta_info_len - 1), 6725 false, NULL); 6726 6727 /* memory allocation failed - let's hope that's transient */ 6728 if (!prof_elems) 6729 continue; 6730 6731 handle: 6732 /* 6733 * FIXME: the timings here are obviously incorrect, 6734 * but only older Intel drivers seem to care, and 6735 * those don't have MLO. If you really need this, 6736 * the problem is having to calculate it with the 6737 * TSF offset etc. The device_timestamp is still 6738 * correct, of course. 6739 */ 6740 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 6741 IEEE80211_CSA_SOURCE_OTHER_LINK); 6742 kfree(prof_elems); 6743 } 6744 } 6745 6746 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 6747 const struct ieee802_11_elems *elems) 6748 { 6749 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 6750 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 6751 6752 if (!elems->ssid) 6753 return false; 6754 6755 /* hidden SSID: zero length */ 6756 if (elems->ssid_len == 0) 6757 return false; 6758 6759 if (elems->ssid_len != cfg->ssid_len) 6760 return true; 6761 6762 /* hidden SSID: zeroed out */ 6763 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 6764 return false; 6765 6766 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 6767 } 6768 6769 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 6770 struct ieee80211_hdr *hdr, size_t len, 6771 struct ieee80211_rx_status *rx_status) 6772 { 6773 struct ieee80211_sub_if_data *sdata = link->sdata; 6774 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6775 struct ieee80211_bss_conf *bss_conf = link->conf; 6776 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6777 struct ieee80211_mgmt *mgmt = (void *) hdr; 6778 size_t baselen; 6779 struct ieee802_11_elems *elems; 6780 struct ieee80211_local *local = sdata->local; 6781 struct ieee80211_chanctx_conf *chanctx_conf; 6782 struct ieee80211_supported_band *sband; 6783 struct ieee80211_channel *chan; 6784 struct link_sta_info *link_sta; 6785 struct sta_info *sta; 6786 u64 changed = 0; 6787 bool erp_valid; 6788 u8 erp_value = 0; 6789 u32 ncrc = 0; 6790 u8 *bssid, *variable = mgmt->u.beacon.variable; 6791 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6792 struct ieee80211_elems_parse_params parse_params = { 6793 .mode = link->u.mgd.conn.mode, 6794 .link_id = -1, 6795 .from_ap = true, 6796 }; 6797 6798 lockdep_assert_wiphy(local->hw.wiphy); 6799 6800 /* Process beacon from the current BSS */ 6801 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 6802 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 6803 struct ieee80211_ext *ext = (void *) mgmt; 6804 6805 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 6806 variable = ext->u.s1g_short_beacon.variable; 6807 else 6808 variable = ext->u.s1g_beacon.variable; 6809 } 6810 6811 baselen = (u8 *) variable - (u8 *) mgmt; 6812 if (baselen > len) 6813 return; 6814 6815 parse_params.start = variable; 6816 parse_params.len = len - baselen; 6817 6818 rcu_read_lock(); 6819 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 6820 if (!chanctx_conf) { 6821 rcu_read_unlock(); 6822 return; 6823 } 6824 6825 if (ieee80211_rx_status_to_khz(rx_status) != 6826 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 6827 rcu_read_unlock(); 6828 return; 6829 } 6830 chan = chanctx_conf->def.chan; 6831 rcu_read_unlock(); 6832 6833 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 6834 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 6835 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 6836 parse_params.bss = ifmgd->assoc_data->link[0].bss; 6837 elems = ieee802_11_parse_elems_full(&parse_params); 6838 if (!elems) 6839 return; 6840 6841 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6842 6843 if (elems->dtim_period) 6844 link->u.mgd.dtim_period = elems->dtim_period; 6845 link->u.mgd.have_beacon = true; 6846 ifmgd->assoc_data->need_beacon = false; 6847 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6848 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6849 bss_conf->sync_tsf = 6850 le64_to_cpu(mgmt->u.beacon.timestamp); 6851 bss_conf->sync_device_ts = 6852 rx_status->device_timestamp; 6853 bss_conf->sync_dtim_count = elems->dtim_count; 6854 } 6855 6856 if (elems->mbssid_config_ie) 6857 bss_conf->profile_periodicity = 6858 elems->mbssid_config_ie->profile_periodicity; 6859 else 6860 bss_conf->profile_periodicity = 0; 6861 6862 if (elems->ext_capab_len >= 11 && 6863 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6864 bss_conf->ema_ap = true; 6865 else 6866 bss_conf->ema_ap = false; 6867 6868 /* continue assoc process */ 6869 ifmgd->assoc_data->timeout = jiffies; 6870 ifmgd->assoc_data->timeout_started = true; 6871 run_again(sdata, ifmgd->assoc_data->timeout); 6872 kfree(elems); 6873 return; 6874 } 6875 6876 if (!ifmgd->associated || 6877 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 6878 return; 6879 bssid = link->u.mgd.bssid; 6880 6881 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 6882 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 6883 local, rx_status); 6884 6885 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 6886 mlme_dbg_ratelimited(sdata, 6887 "cancelling AP probe due to a received beacon\n"); 6888 ieee80211_reset_ap_probe(sdata); 6889 } 6890 6891 /* 6892 * Push the beacon loss detection into the future since 6893 * we are processing a beacon from the AP just now. 6894 */ 6895 ieee80211_sta_reset_beacon_monitor(sdata); 6896 6897 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 6898 * element (which carries the beacon interval). Don't forget to add a 6899 * bit to care_about_ies[] above if mac80211 is interested in a 6900 * changing S1G element. 6901 */ 6902 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6903 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 6904 parse_params.bss = bss_conf->bss; 6905 parse_params.filter = care_about_ies; 6906 parse_params.crc = ncrc; 6907 elems = ieee802_11_parse_elems_full(&parse_params); 6908 if (!elems) 6909 return; 6910 6911 if (rx_status->flag & RX_FLAG_DECRYPTED && 6912 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 6913 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 6914 sdata->vif.cfg.ap_addr); 6915 __ieee80211_disconnect(sdata); 6916 return; 6917 } 6918 6919 ncrc = elems->crc; 6920 6921 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 6922 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 6923 if (local->hw.conf.dynamic_ps_timeout > 0) { 6924 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 6925 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 6926 ieee80211_hw_config(local, 6927 IEEE80211_CONF_CHANGE_PS); 6928 } 6929 ieee80211_send_nullfunc(local, sdata, false); 6930 } else if (!local->pspolling && sdata->u.mgd.powersave) { 6931 local->pspolling = true; 6932 6933 /* 6934 * Here is assumed that the driver will be 6935 * able to send ps-poll frame and receive a 6936 * response even though power save mode is 6937 * enabled, but some drivers might require 6938 * to disable power save here. This needs 6939 * to be investigated. 6940 */ 6941 ieee80211_send_pspoll(local, sdata); 6942 } 6943 } 6944 6945 if (sdata->vif.p2p || 6946 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 6947 struct ieee80211_p2p_noa_attr noa = {}; 6948 int ret; 6949 6950 ret = cfg80211_get_p2p_attr(variable, 6951 len - baselen, 6952 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 6953 (u8 *) &noa, sizeof(noa)); 6954 if (ret >= 2) { 6955 if (link->u.mgd.p2p_noa_index != noa.index) { 6956 /* valid noa_attr and index changed */ 6957 link->u.mgd.p2p_noa_index = noa.index; 6958 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 6959 changed |= BSS_CHANGED_P2P_PS; 6960 /* 6961 * make sure we update all information, the CRC 6962 * mechanism doesn't look at P2P attributes. 6963 */ 6964 link->u.mgd.beacon_crc_valid = false; 6965 } 6966 } else if (link->u.mgd.p2p_noa_index != -1) { 6967 /* noa_attr not found and we had valid noa_attr before */ 6968 link->u.mgd.p2p_noa_index = -1; 6969 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 6970 changed |= BSS_CHANGED_P2P_PS; 6971 link->u.mgd.beacon_crc_valid = false; 6972 } 6973 } 6974 6975 /* 6976 * Update beacon timing and dtim count on every beacon appearance. This 6977 * will allow the driver to use the most updated values. Do it before 6978 * comparing this one with last received beacon. 6979 * IMPORTANT: These parameters would possibly be out of sync by the time 6980 * the driver will use them. The synchronized view is currently 6981 * guaranteed only in certain callbacks. 6982 */ 6983 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6984 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6985 bss_conf->sync_tsf = 6986 le64_to_cpu(mgmt->u.beacon.timestamp); 6987 bss_conf->sync_device_ts = 6988 rx_status->device_timestamp; 6989 bss_conf->sync_dtim_count = elems->dtim_count; 6990 } 6991 6992 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 6993 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 6994 goto free; 6995 link->u.mgd.beacon_crc = ncrc; 6996 link->u.mgd.beacon_crc_valid = true; 6997 6998 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6999 7000 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7001 rx_status->device_timestamp, 7002 elems, elems, 7003 IEEE80211_CSA_SOURCE_BEACON); 7004 7005 /* note that after this elems->ml_basic can no longer be used fully */ 7006 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7007 7008 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7009 7010 if (!link->u.mgd.disable_wmm_tracking && 7011 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7012 elems->wmm_param_len, 7013 elems->mu_edca_param_set)) 7014 changed |= BSS_CHANGED_QOS; 7015 7016 /* 7017 * If we haven't had a beacon before, tell the driver about the 7018 * DTIM period (and beacon timing if desired) now. 7019 */ 7020 if (!link->u.mgd.have_beacon) { 7021 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7022 bss_conf->dtim_period = elems->dtim_period ?: 1; 7023 7024 changed |= BSS_CHANGED_BEACON_INFO; 7025 link->u.mgd.have_beacon = true; 7026 7027 ieee80211_recalc_ps(local); 7028 7029 ieee80211_recalc_ps_vif(sdata); 7030 } 7031 7032 if (elems->erp_info) { 7033 erp_valid = true; 7034 erp_value = elems->erp_info[0]; 7035 } else { 7036 erp_valid = false; 7037 } 7038 7039 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7040 changed |= ieee80211_handle_bss_capability(link, 7041 le16_to_cpu(mgmt->u.beacon.capab_info), 7042 erp_valid, erp_value); 7043 7044 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7045 if (WARN_ON(!sta)) { 7046 goto free; 7047 } 7048 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7049 lockdep_is_held(&local->hw.wiphy->mtx)); 7050 if (WARN_ON(!link_sta)) { 7051 goto free; 7052 } 7053 7054 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7055 goto free; 7056 7057 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7058 7059 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7060 7061 if (ieee80211_config_bw(link, elems, true, &changed)) { 7062 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7063 WLAN_REASON_DEAUTH_LEAVING, 7064 true, deauth_buf); 7065 ieee80211_report_disconnect(sdata, deauth_buf, 7066 sizeof(deauth_buf), true, 7067 WLAN_REASON_DEAUTH_LEAVING, 7068 false); 7069 goto free; 7070 } 7071 7072 if (elems->opmode_notif) 7073 ieee80211_vht_handle_opmode(sdata, link_sta, 7074 *elems->opmode_notif, 7075 rx_status->band); 7076 7077 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7078 elems->country_elem, 7079 elems->country_elem_len, 7080 elems->pwr_constr_elem, 7081 elems->cisco_dtpc_elem); 7082 7083 ieee80211_ml_reconfiguration(sdata, elems); 7084 ieee80211_process_adv_ttlm(sdata, elems, 7085 le64_to_cpu(mgmt->u.beacon.timestamp)); 7086 7087 ieee80211_link_info_change_notify(sdata, link, changed); 7088 free: 7089 kfree(elems); 7090 } 7091 7092 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7093 struct ieee80211_neg_ttlm neg_ttlm) 7094 { 7095 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7096 u8 i; 7097 7098 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7099 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7100 7101 /* If there is an active TTLM, unset previously suspended links */ 7102 if (sdata->vif.neg_ttlm.valid) 7103 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7104 7105 /* exclude links that are already disabled by advertised TTLM */ 7106 new_active_links = 7107 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7108 new_suspended_links = 7109 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7110 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7111 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7112 new_dormant_links, new_suspended_links)) 7113 return; 7114 7115 sdata->vif.neg_ttlm = neg_ttlm; 7116 sdata->vif.neg_ttlm.valid = true; 7117 } 7118 7119 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7120 struct wiphy_work *work) 7121 { 7122 struct ieee80211_sub_if_data *sdata = 7123 container_of(work, struct ieee80211_sub_if_data, 7124 u.mgd.neg_ttlm_timeout_work.work); 7125 7126 sdata_info(sdata, 7127 "No negotiated TTLM response from AP, disconnecting.\n"); 7128 7129 __ieee80211_disconnect(sdata); 7130 } 7131 7132 static void 7133 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7134 struct ieee80211_neg_ttlm *neg_ttlm) 7135 { 7136 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7137 7138 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7139 sizeof(neg_ttlm->downlink))) { 7140 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7141 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7142 } else { 7143 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7144 } 7145 7146 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7147 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7148 __le16 map; 7149 7150 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7151 7152 pos = skb_put(skb, len + 2); 7153 *pos++ = WLAN_EID_EXTENSION; 7154 len_pos = pos++; 7155 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7156 *pos++ = direction[i]; 7157 map_ind_pos = pos++; 7158 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7159 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7160 cpu_to_le16(neg_ttlm->uplink[tid]) : 7161 cpu_to_le16(neg_ttlm->downlink[tid]); 7162 if (!map) 7163 continue; 7164 7165 len += 2; 7166 map_ind |= BIT(tid); 7167 skb_put_data(skb, &map, sizeof(map)); 7168 } 7169 7170 *map_ind_pos = map_ind; 7171 *len_pos = len; 7172 7173 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7174 break; 7175 } 7176 } 7177 7178 static void 7179 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7180 struct ieee80211_neg_ttlm *neg_ttlm, 7181 u8 dialog_token) 7182 { 7183 struct ieee80211_local *local = sdata->local; 7184 struct ieee80211_mgmt *mgmt; 7185 struct sk_buff *skb; 7186 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7187 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7188 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7189 7190 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7191 if (!skb) 7192 return; 7193 7194 skb_reserve(skb, local->tx_headroom); 7195 mgmt = skb_put_zero(skb, hdr_len); 7196 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7197 IEEE80211_STYPE_ACTION); 7198 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7199 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7200 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7201 7202 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7203 mgmt->u.action.u.ttlm_req.action_code = 7204 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7205 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7206 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7207 ieee80211_tx_skb(sdata, skb); 7208 } 7209 7210 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7211 struct cfg80211_ttlm_params *params) 7212 { 7213 struct ieee80211_neg_ttlm neg_ttlm = {}; 7214 u8 i; 7215 7216 if (!ieee80211_vif_is_mld(&sdata->vif) || 7217 !(sdata->vif.cfg.mld_capa_op & 7218 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7219 return -EINVAL; 7220 7221 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7222 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7223 (params->ulink[i] & ~sdata->vif.valid_links)) 7224 return -EINVAL; 7225 7226 neg_ttlm.downlink[i] = params->dlink[i]; 7227 neg_ttlm.uplink[i] = params->ulink[i]; 7228 } 7229 7230 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7231 NEG_TTLM_RES_ACCEPT) 7232 return -EINVAL; 7233 7234 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7235 sdata->u.mgd.dialog_token_alloc++; 7236 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7237 sdata->u.mgd.dialog_token_alloc); 7238 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7239 &sdata->u.mgd.neg_ttlm_timeout_work); 7240 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7241 &sdata->u.mgd.neg_ttlm_timeout_work, 7242 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7243 return 0; 7244 } 7245 7246 static void 7247 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7248 enum ieee80211_neg_ttlm_res ttlm_res, 7249 u8 dialog_token, 7250 struct ieee80211_neg_ttlm *neg_ttlm) 7251 { 7252 struct ieee80211_local *local = sdata->local; 7253 struct ieee80211_mgmt *mgmt; 7254 struct sk_buff *skb; 7255 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7256 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7257 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7258 7259 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7260 if (!skb) 7261 return; 7262 7263 skb_reserve(skb, local->tx_headroom); 7264 mgmt = skb_put_zero(skb, hdr_len); 7265 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7266 IEEE80211_STYPE_ACTION); 7267 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7268 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7269 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7270 7271 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7272 mgmt->u.action.u.ttlm_res.action_code = 7273 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7274 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7275 switch (ttlm_res) { 7276 default: 7277 WARN_ON(1); 7278 fallthrough; 7279 case NEG_TTLM_RES_REJECT: 7280 mgmt->u.action.u.ttlm_res.status_code = 7281 WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7282 break; 7283 case NEG_TTLM_RES_ACCEPT: 7284 mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS; 7285 break; 7286 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7287 mgmt->u.action.u.ttlm_res.status_code = 7288 WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7289 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7290 break; 7291 } 7292 7293 ieee80211_tx_skb(sdata, skb); 7294 } 7295 7296 static int 7297 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7298 const struct ieee80211_ttlm_elem *ttlm, 7299 struct ieee80211_neg_ttlm *neg_ttlm, 7300 u8 *direction) 7301 { 7302 u8 control, link_map_presence, map_size, tid; 7303 u8 *pos; 7304 7305 /* The element size was already validated in 7306 * ieee80211_tid_to_link_map_size_ok() 7307 */ 7308 pos = (void *)ttlm->optional; 7309 7310 control = ttlm->control; 7311 7312 /* mapping switch time and expected duration fields are not expected 7313 * in case of negotiated TTLM 7314 */ 7315 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7316 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7317 mlme_dbg(sdata, 7318 "Invalid TTLM element in negotiated TTLM request\n"); 7319 return -EINVAL; 7320 } 7321 7322 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7323 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7324 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7325 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7326 } 7327 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7328 return 0; 7329 } 7330 7331 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7332 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7333 *direction != IEEE80211_TTLM_DIRECTION_UP && 7334 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7335 return -EINVAL; 7336 7337 link_map_presence = *pos; 7338 pos++; 7339 7340 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7341 map_size = 1; 7342 else 7343 map_size = 2; 7344 7345 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7346 u16 map; 7347 7348 if (link_map_presence & BIT(tid)) { 7349 map = ieee80211_get_ttlm(map_size, pos); 7350 if (!map) { 7351 mlme_dbg(sdata, 7352 "No active links for TID %d", tid); 7353 return -EINVAL; 7354 } 7355 } else { 7356 map = 0; 7357 } 7358 7359 switch (*direction) { 7360 case IEEE80211_TTLM_DIRECTION_BOTH: 7361 neg_ttlm->downlink[tid] = map; 7362 neg_ttlm->uplink[tid] = map; 7363 break; 7364 case IEEE80211_TTLM_DIRECTION_DOWN: 7365 neg_ttlm->downlink[tid] = map; 7366 break; 7367 case IEEE80211_TTLM_DIRECTION_UP: 7368 neg_ttlm->uplink[tid] = map; 7369 break; 7370 default: 7371 return -EINVAL; 7372 } 7373 pos += map_size; 7374 } 7375 return 0; 7376 } 7377 7378 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7379 struct ieee80211_mgmt *mgmt, size_t len) 7380 { 7381 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7382 size_t ies_len; 7383 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7384 struct ieee802_11_elems *elems = NULL; 7385 struct ieee80211_neg_ttlm neg_ttlm = {}; 7386 7387 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7388 7389 if (!ieee80211_vif_is_mld(&sdata->vif)) 7390 return; 7391 7392 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7393 ies_len = len - offsetof(struct ieee80211_mgmt, 7394 u.action.u.ttlm_req.variable); 7395 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7396 ies_len, true, NULL); 7397 if (!elems) { 7398 ttlm_res = NEG_TTLM_RES_REJECT; 7399 goto out; 7400 } 7401 7402 for (i = 0; i < elems->ttlm_num; i++) { 7403 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7404 &neg_ttlm, &direction[i]) || 7405 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7406 elems->ttlm_num != 1)) { 7407 ttlm_res = NEG_TTLM_RES_REJECT; 7408 goto out; 7409 } 7410 } 7411 7412 if (!elems->ttlm_num || 7413 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7414 ttlm_res = NEG_TTLM_RES_REJECT; 7415 goto out; 7416 } 7417 7418 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7419 if ((neg_ttlm.downlink[i] && 7420 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7421 (neg_ttlm.uplink[i] && 7422 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7423 ttlm_res = NEG_TTLM_RES_REJECT; 7424 goto out; 7425 } 7426 } 7427 7428 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7429 7430 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 7431 goto out; 7432 7433 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7434 out: 7435 kfree(elems); 7436 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 7437 } 7438 7439 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7440 struct ieee80211_mgmt *mgmt, size_t len) 7441 { 7442 if (!ieee80211_vif_is_mld(&sdata->vif) || 7443 mgmt->u.action.u.ttlm_req.dialog_token != 7444 sdata->u.mgd.dialog_token_alloc) 7445 return; 7446 7447 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7448 &sdata->u.mgd.neg_ttlm_timeout_work); 7449 7450 /* MLD station sends a TID to link mapping request, mainly to handle 7451 * BTM (BSS transition management) request, in which case it needs to 7452 * restrict the active links set. 7453 * In this case it's not expected that the MLD AP will reject the 7454 * negotiated TTLM request. 7455 * This can be better implemented in the future, to handle request 7456 * rejections. 7457 */ 7458 if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS) 7459 __ieee80211_disconnect(sdata); 7460 } 7461 7462 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 7463 struct wiphy_work *work) 7464 { 7465 u16 new_dormant_links; 7466 struct ieee80211_sub_if_data *sdata = 7467 container_of(work, struct ieee80211_sub_if_data, 7468 u.mgd.teardown_ttlm_work); 7469 7470 if (!sdata->vif.neg_ttlm.valid) 7471 return; 7472 7473 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7474 new_dormant_links = 7475 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7476 sdata->vif.suspended_links = 0; 7477 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7478 new_dormant_links); 7479 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 7480 BSS_CHANGED_MLD_VALID_LINKS); 7481 } 7482 7483 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 7484 { 7485 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7486 struct ieee80211_local *local = sdata->local; 7487 struct ieee80211_mgmt *mgmt; 7488 struct sk_buff *skb; 7489 int frame_len = offsetofend(struct ieee80211_mgmt, 7490 u.action.u.ttlm_tear_down); 7491 struct ieee80211_tx_info *info; 7492 7493 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 7494 if (!skb) 7495 return; 7496 7497 skb_reserve(skb, local->hw.extra_tx_headroom); 7498 mgmt = skb_put_zero(skb, frame_len); 7499 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7500 IEEE80211_STYPE_ACTION); 7501 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7502 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7503 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7504 7505 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7506 mgmt->u.action.u.ttlm_tear_down.action_code = 7507 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 7508 7509 info = IEEE80211_SKB_CB(skb); 7510 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 7511 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 7512 ieee80211_tx_skb(sdata, skb); 7513 } 7514 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 7515 7516 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 7517 struct sk_buff *skb) 7518 { 7519 struct ieee80211_link_data *link = &sdata->deflink; 7520 struct ieee80211_rx_status *rx_status; 7521 struct ieee80211_hdr *hdr; 7522 u16 fc; 7523 7524 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7525 7526 rx_status = (struct ieee80211_rx_status *) skb->cb; 7527 hdr = (struct ieee80211_hdr *) skb->data; 7528 fc = le16_to_cpu(hdr->frame_control); 7529 7530 switch (fc & IEEE80211_FCTL_STYPE) { 7531 case IEEE80211_STYPE_S1G_BEACON: 7532 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 7533 break; 7534 } 7535 } 7536 7537 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 7538 struct sk_buff *skb) 7539 { 7540 struct ieee80211_link_data *link = &sdata->deflink; 7541 struct ieee80211_rx_status *rx_status; 7542 struct ieee802_11_elems *elems; 7543 struct ieee80211_mgmt *mgmt; 7544 u16 fc; 7545 int ies_len; 7546 7547 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7548 7549 rx_status = (struct ieee80211_rx_status *) skb->cb; 7550 mgmt = (struct ieee80211_mgmt *) skb->data; 7551 fc = le16_to_cpu(mgmt->frame_control); 7552 7553 if (rx_status->link_valid) { 7554 link = sdata_dereference(sdata->link[rx_status->link_id], 7555 sdata); 7556 if (!link) 7557 return; 7558 } 7559 7560 switch (fc & IEEE80211_FCTL_STYPE) { 7561 case IEEE80211_STYPE_BEACON: 7562 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 7563 skb->len, rx_status); 7564 break; 7565 case IEEE80211_STYPE_PROBE_RESP: 7566 ieee80211_rx_mgmt_probe_resp(link, skb); 7567 break; 7568 case IEEE80211_STYPE_AUTH: 7569 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 7570 break; 7571 case IEEE80211_STYPE_DEAUTH: 7572 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 7573 break; 7574 case IEEE80211_STYPE_DISASSOC: 7575 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 7576 break; 7577 case IEEE80211_STYPE_ASSOC_RESP: 7578 case IEEE80211_STYPE_REASSOC_RESP: 7579 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 7580 break; 7581 case IEEE80211_STYPE_ACTION: 7582 if (!sdata->u.mgd.associated || 7583 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 7584 break; 7585 7586 switch (mgmt->u.action.category) { 7587 case WLAN_CATEGORY_SPECTRUM_MGMT: 7588 ies_len = skb->len - 7589 offsetof(struct ieee80211_mgmt, 7590 u.action.u.chan_switch.variable); 7591 7592 if (ies_len < 0) 7593 break; 7594 7595 /* CSA IE cannot be overridden, no need for BSSID */ 7596 elems = ieee802_11_parse_elems( 7597 mgmt->u.action.u.chan_switch.variable, 7598 ies_len, true, NULL); 7599 7600 if (elems && !elems->parse_error) { 7601 enum ieee80211_csa_source src = 7602 IEEE80211_CSA_SOURCE_PROT_ACTION; 7603 7604 ieee80211_sta_process_chanswitch(link, 7605 rx_status->mactime, 7606 rx_status->device_timestamp, 7607 elems, elems, 7608 src); 7609 } 7610 kfree(elems); 7611 break; 7612 case WLAN_CATEGORY_PUBLIC: 7613 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 7614 ies_len = skb->len - 7615 offsetof(struct ieee80211_mgmt, 7616 u.action.u.ext_chan_switch.variable); 7617 7618 if (ies_len < 0) 7619 break; 7620 7621 /* 7622 * extended CSA IE can't be overridden, no need for 7623 * BSSID 7624 */ 7625 elems = ieee802_11_parse_elems( 7626 mgmt->u.action.u.ext_chan_switch.variable, 7627 ies_len, true, NULL); 7628 7629 if (elems && !elems->parse_error) { 7630 enum ieee80211_csa_source src; 7631 7632 if (mgmt->u.action.category == 7633 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 7634 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 7635 else 7636 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 7637 7638 /* for the handling code pretend it was an IE */ 7639 elems->ext_chansw_ie = 7640 &mgmt->u.action.u.ext_chan_switch.data; 7641 7642 ieee80211_sta_process_chanswitch(link, 7643 rx_status->mactime, 7644 rx_status->device_timestamp, 7645 elems, elems, 7646 src); 7647 } 7648 7649 kfree(elems); 7650 break; 7651 } 7652 break; 7653 } 7654 } 7655 7656 static void ieee80211_sta_timer(struct timer_list *t) 7657 { 7658 struct ieee80211_sub_if_data *sdata = 7659 from_timer(sdata, t, u.mgd.timer); 7660 7661 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 7662 } 7663 7664 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 7665 u8 reason, bool tx) 7666 { 7667 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7668 7669 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 7670 tx, frame_buf); 7671 7672 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7673 reason, false); 7674 } 7675 7676 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 7677 { 7678 struct ieee80211_local *local = sdata->local; 7679 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7680 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 7681 u32 tx_flags = 0; 7682 u16 trans = 1; 7683 u16 status = 0; 7684 struct ieee80211_prep_tx_info info = { 7685 .subtype = IEEE80211_STYPE_AUTH, 7686 }; 7687 7688 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7689 7690 if (WARN_ON_ONCE(!auth_data)) 7691 return -EINVAL; 7692 7693 auth_data->tries++; 7694 7695 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 7696 sdata_info(sdata, "authentication with %pM timed out\n", 7697 auth_data->ap_addr); 7698 7699 /* 7700 * Most likely AP is not in the range so remove the 7701 * bss struct for that AP. 7702 */ 7703 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 7704 7705 return -ETIMEDOUT; 7706 } 7707 7708 if (auth_data->algorithm == WLAN_AUTH_SAE) 7709 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 7710 7711 info.link_id = auth_data->link_id; 7712 drv_mgd_prepare_tx(local, sdata, &info); 7713 7714 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 7715 auth_data->ap_addr, auth_data->tries, 7716 IEEE80211_AUTH_MAX_TRIES); 7717 7718 auth_data->expected_transaction = 2; 7719 7720 if (auth_data->algorithm == WLAN_AUTH_SAE) { 7721 trans = auth_data->sae_trans; 7722 status = auth_data->sae_status; 7723 auth_data->expected_transaction = trans; 7724 } 7725 7726 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7727 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 7728 IEEE80211_TX_INTFL_MLME_CONN_TX; 7729 7730 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 7731 auth_data->data, auth_data->data_len, 7732 auth_data->ap_addr, auth_data->ap_addr, 7733 NULL, 0, 0, tx_flags); 7734 7735 if (tx_flags == 0) { 7736 if (auth_data->algorithm == WLAN_AUTH_SAE) 7737 auth_data->timeout = jiffies + 7738 IEEE80211_AUTH_TIMEOUT_SAE; 7739 else 7740 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 7741 } else { 7742 auth_data->timeout = 7743 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 7744 } 7745 7746 auth_data->timeout_started = true; 7747 run_again(sdata, auth_data->timeout); 7748 7749 return 0; 7750 } 7751 7752 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 7753 { 7754 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 7755 struct ieee80211_local *local = sdata->local; 7756 int ret; 7757 7758 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7759 7760 assoc_data->tries++; 7761 assoc_data->comeback = false; 7762 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 7763 sdata_info(sdata, "association with %pM timed out\n", 7764 assoc_data->ap_addr); 7765 7766 /* 7767 * Most likely AP is not in the range so remove the 7768 * bss struct for that AP. 7769 */ 7770 cfg80211_unlink_bss(local->hw.wiphy, 7771 assoc_data->link[assoc_data->assoc_link_id].bss); 7772 7773 return -ETIMEDOUT; 7774 } 7775 7776 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 7777 assoc_data->ap_addr, assoc_data->tries, 7778 IEEE80211_ASSOC_MAX_TRIES); 7779 ret = ieee80211_send_assoc(sdata); 7780 if (ret) 7781 return ret; 7782 7783 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7784 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 7785 assoc_data->timeout_started = true; 7786 run_again(sdata, assoc_data->timeout); 7787 } else { 7788 assoc_data->timeout = 7789 round_jiffies_up(jiffies + 7790 IEEE80211_ASSOC_TIMEOUT_LONG); 7791 assoc_data->timeout_started = true; 7792 run_again(sdata, assoc_data->timeout); 7793 } 7794 7795 return 0; 7796 } 7797 7798 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 7799 __le16 fc, bool acked) 7800 { 7801 struct ieee80211_local *local = sdata->local; 7802 7803 sdata->u.mgd.status_fc = fc; 7804 sdata->u.mgd.status_acked = acked; 7805 sdata->u.mgd.status_received = true; 7806 7807 wiphy_work_queue(local->hw.wiphy, &sdata->work); 7808 } 7809 7810 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 7811 { 7812 struct ieee80211_local *local = sdata->local; 7813 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7814 7815 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7816 7817 if (ifmgd->status_received) { 7818 __le16 fc = ifmgd->status_fc; 7819 bool status_acked = ifmgd->status_acked; 7820 7821 ifmgd->status_received = false; 7822 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 7823 if (status_acked) { 7824 if (ifmgd->auth_data->algorithm == 7825 WLAN_AUTH_SAE) 7826 ifmgd->auth_data->timeout = 7827 jiffies + 7828 IEEE80211_AUTH_TIMEOUT_SAE; 7829 else 7830 ifmgd->auth_data->timeout = 7831 jiffies + 7832 IEEE80211_AUTH_TIMEOUT_SHORT; 7833 run_again(sdata, ifmgd->auth_data->timeout); 7834 } else { 7835 ifmgd->auth_data->timeout = jiffies - 1; 7836 } 7837 ifmgd->auth_data->timeout_started = true; 7838 } else if (ifmgd->assoc_data && 7839 !ifmgd->assoc_data->comeback && 7840 (ieee80211_is_assoc_req(fc) || 7841 ieee80211_is_reassoc_req(fc))) { 7842 /* 7843 * Update association timeout based on the TX status 7844 * for the (Re)Association Request frame. Skip this if 7845 * we have already processed a (Re)Association Response 7846 * frame that indicated need for association comeback 7847 * at a specific time in the future. This could happen 7848 * if the TX status information is delayed enough for 7849 * the response to be received and processed first. 7850 */ 7851 if (status_acked) { 7852 ifmgd->assoc_data->timeout = 7853 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 7854 run_again(sdata, ifmgd->assoc_data->timeout); 7855 } else { 7856 ifmgd->assoc_data->timeout = jiffies - 1; 7857 } 7858 ifmgd->assoc_data->timeout_started = true; 7859 } 7860 } 7861 7862 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 7863 time_after(jiffies, ifmgd->auth_data->timeout)) { 7864 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 7865 /* 7866 * ok ... we waited for assoc or continuation but 7867 * userspace didn't do it, so kill the auth data 7868 */ 7869 ieee80211_destroy_auth_data(sdata, false); 7870 } else if (ieee80211_auth(sdata)) { 7871 u8 ap_addr[ETH_ALEN]; 7872 struct ieee80211_event event = { 7873 .type = MLME_EVENT, 7874 .u.mlme.data = AUTH_EVENT, 7875 .u.mlme.status = MLME_TIMEOUT, 7876 }; 7877 7878 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 7879 7880 ieee80211_destroy_auth_data(sdata, false); 7881 7882 cfg80211_auth_timeout(sdata->dev, ap_addr); 7883 drv_event_callback(sdata->local, sdata, &event); 7884 } 7885 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 7886 run_again(sdata, ifmgd->auth_data->timeout); 7887 7888 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 7889 time_after(jiffies, ifmgd->assoc_data->timeout)) { 7890 if ((ifmgd->assoc_data->need_beacon && 7891 !sdata->deflink.u.mgd.have_beacon) || 7892 ieee80211_do_assoc(sdata)) { 7893 struct ieee80211_event event = { 7894 .type = MLME_EVENT, 7895 .u.mlme.data = ASSOC_EVENT, 7896 .u.mlme.status = MLME_TIMEOUT, 7897 }; 7898 7899 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7900 drv_event_callback(sdata->local, sdata, &event); 7901 } 7902 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 7903 run_again(sdata, ifmgd->assoc_data->timeout); 7904 7905 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 7906 ifmgd->associated) { 7907 u8 *bssid = sdata->deflink.u.mgd.bssid; 7908 int max_tries; 7909 7910 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7911 max_tries = max_nullfunc_tries; 7912 else 7913 max_tries = max_probe_tries; 7914 7915 /* ACK received for nullfunc probing frame */ 7916 if (!ifmgd->probe_send_count) 7917 ieee80211_reset_ap_probe(sdata); 7918 else if (ifmgd->nullfunc_failed) { 7919 if (ifmgd->probe_send_count < max_tries) { 7920 mlme_dbg(sdata, 7921 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 7922 bssid, ifmgd->probe_send_count, 7923 max_tries); 7924 ieee80211_mgd_probe_ap_send(sdata); 7925 } else { 7926 mlme_dbg(sdata, 7927 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 7928 bssid); 7929 ieee80211_sta_connection_lost(sdata, 7930 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 7931 false); 7932 } 7933 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 7934 run_again(sdata, ifmgd->probe_timeout); 7935 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7936 mlme_dbg(sdata, 7937 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 7938 bssid, probe_wait_ms); 7939 ieee80211_sta_connection_lost(sdata, 7940 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7941 } else if (ifmgd->probe_send_count < max_tries) { 7942 mlme_dbg(sdata, 7943 "No probe response from AP %pM after %dms, try %d/%i\n", 7944 bssid, probe_wait_ms, 7945 ifmgd->probe_send_count, max_tries); 7946 ieee80211_mgd_probe_ap_send(sdata); 7947 } else { 7948 /* 7949 * We actually lost the connection ... or did we? 7950 * Let's make sure! 7951 */ 7952 mlme_dbg(sdata, 7953 "No probe response from AP %pM after %dms, disconnecting.\n", 7954 bssid, probe_wait_ms); 7955 7956 ieee80211_sta_connection_lost(sdata, 7957 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7958 } 7959 } 7960 } 7961 7962 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 7963 { 7964 struct ieee80211_sub_if_data *sdata = 7965 from_timer(sdata, t, u.mgd.bcn_mon_timer); 7966 7967 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7968 return; 7969 7970 if (sdata->vif.bss_conf.csa_active && 7971 !sdata->deflink.u.mgd.csa.waiting_bcn) 7972 return; 7973 7974 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 7975 return; 7976 7977 sdata->u.mgd.connection_loss = false; 7978 wiphy_work_queue(sdata->local->hw.wiphy, 7979 &sdata->u.mgd.beacon_connection_loss_work); 7980 } 7981 7982 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 7983 { 7984 struct ieee80211_sub_if_data *sdata = 7985 from_timer(sdata, t, u.mgd.conn_mon_timer); 7986 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7987 struct ieee80211_local *local = sdata->local; 7988 struct sta_info *sta; 7989 unsigned long timeout; 7990 7991 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7992 return; 7993 7994 if (sdata->vif.bss_conf.csa_active && 7995 !sdata->deflink.u.mgd.csa.waiting_bcn) 7996 return; 7997 7998 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7999 if (!sta) 8000 return; 8001 8002 timeout = sta->deflink.status_stats.last_ack; 8003 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 8004 timeout = sta->deflink.rx_stats.last_rx; 8005 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8006 8007 /* If timeout is after now, then update timer to fire at 8008 * the later date, but do not actually probe at this time. 8009 */ 8010 if (time_is_after_jiffies(timeout)) { 8011 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 8012 return; 8013 } 8014 8015 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8016 } 8017 8018 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8019 struct wiphy_work *work) 8020 { 8021 struct ieee80211_sub_if_data *sdata = 8022 container_of(work, struct ieee80211_sub_if_data, 8023 u.mgd.monitor_work); 8024 8025 ieee80211_mgd_probe_ap(sdata, false); 8026 } 8027 8028 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8029 { 8030 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8031 __ieee80211_stop_poll(sdata); 8032 8033 /* let's probe the connection once */ 8034 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8035 wiphy_work_queue(sdata->local->hw.wiphy, 8036 &sdata->u.mgd.monitor_work); 8037 } 8038 } 8039 8040 #ifdef CONFIG_PM 8041 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8042 { 8043 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8044 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8045 8046 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8047 8048 if (ifmgd->auth_data || ifmgd->assoc_data) { 8049 const u8 *ap_addr = ifmgd->auth_data ? 8050 ifmgd->auth_data->ap_addr : 8051 ifmgd->assoc_data->ap_addr; 8052 8053 /* 8054 * If we are trying to authenticate / associate while suspending, 8055 * cfg80211 won't know and won't actually abort those attempts, 8056 * thus we need to do that ourselves. 8057 */ 8058 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8059 IEEE80211_STYPE_DEAUTH, 8060 WLAN_REASON_DEAUTH_LEAVING, 8061 false, frame_buf); 8062 if (ifmgd->assoc_data) 8063 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8064 if (ifmgd->auth_data) 8065 ieee80211_destroy_auth_data(sdata, false); 8066 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8067 IEEE80211_DEAUTH_FRAME_LEN, 8068 false); 8069 } 8070 8071 /* This is a bit of a hack - we should find a better and more generic 8072 * solution to this. Normally when suspending, cfg80211 will in fact 8073 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8074 * auth (not so important) or assoc (this is the problem) process. 8075 * 8076 * As a consequence, it can happen that we are in the process of both 8077 * associating and suspending, and receive an association response 8078 * after cfg80211 has checked if it needs to disconnect, but before 8079 * we actually set the flag to drop incoming frames. This will then 8080 * cause the workqueue flush to process the association response in 8081 * the suspend, resulting in a successful association just before it 8082 * tries to remove the interface from the driver, which now though 8083 * has a channel context assigned ... this results in issues. 8084 * 8085 * To work around this (for now) simply deauth here again if we're 8086 * now connected. 8087 */ 8088 if (ifmgd->associated && !sdata->local->wowlan) { 8089 u8 bssid[ETH_ALEN]; 8090 struct cfg80211_deauth_request req = { 8091 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8092 .bssid = bssid, 8093 }; 8094 8095 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8096 ieee80211_mgd_deauth(sdata, &req); 8097 } 8098 } 8099 #endif 8100 8101 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8102 { 8103 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8104 8105 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8106 8107 if (!ifmgd->associated) 8108 return; 8109 8110 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8111 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8112 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8113 ieee80211_sta_connection_lost(sdata, 8114 WLAN_REASON_UNSPECIFIED, 8115 true); 8116 return; 8117 } 8118 8119 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8120 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8121 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8122 ieee80211_sta_connection_lost(sdata, 8123 WLAN_REASON_UNSPECIFIED, 8124 true); 8125 return; 8126 } 8127 } 8128 8129 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8130 struct wiphy_work *work) 8131 { 8132 struct ieee80211_link_data *link = 8133 container_of(work, struct ieee80211_link_data, 8134 u.mgd.request_smps_work); 8135 8136 __ieee80211_request_smps_mgd(link->sdata, link, 8137 link->u.mgd.driver_smps_mode); 8138 } 8139 8140 /* interface setup */ 8141 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8142 { 8143 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8144 8145 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8146 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8147 ieee80211_beacon_connection_loss_work); 8148 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8149 ieee80211_csa_connection_drop_work); 8150 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8151 ieee80211_tdls_peer_del_work); 8152 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8153 ieee80211_ml_reconf_work); 8154 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8155 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8156 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8157 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8158 ieee80211_sta_handle_tspec_ac_params_wk); 8159 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8160 ieee80211_tid_to_link_map_work); 8161 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8162 ieee80211_neg_ttlm_timeout_work); 8163 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8164 ieee80211_teardown_ttlm_work); 8165 8166 ifmgd->flags = 0; 8167 ifmgd->powersave = sdata->wdev.ps; 8168 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8169 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8170 /* Setup TDLS data */ 8171 spin_lock_init(&ifmgd->teardown_lock); 8172 ifmgd->teardown_skb = NULL; 8173 ifmgd->orig_teardown_skb = NULL; 8174 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8175 } 8176 8177 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8178 struct wiphy_work *work) 8179 { 8180 struct ieee80211_link_data *link = 8181 container_of(work, struct ieee80211_link_data, 8182 u.mgd.recalc_smps); 8183 8184 ieee80211_recalc_smps(link->sdata, link); 8185 } 8186 8187 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8188 { 8189 struct ieee80211_sub_if_data *sdata = link->sdata; 8190 struct ieee80211_local *local = sdata->local; 8191 unsigned int link_id = link->link_id; 8192 8193 link->u.mgd.p2p_noa_index = -1; 8194 link->conf->bssid = link->u.mgd.bssid; 8195 link->smps_mode = IEEE80211_SMPS_OFF; 8196 8197 wiphy_work_init(&link->u.mgd.request_smps_work, 8198 ieee80211_request_smps_mgd_work); 8199 wiphy_work_init(&link->u.mgd.recalc_smps, 8200 ieee80211_recalc_smps_work); 8201 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8202 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8203 else 8204 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8205 8206 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8207 ieee80211_csa_switch_work); 8208 8209 ieee80211_clear_tpe(&link->conf->tpe); 8210 8211 if (sdata->u.mgd.assoc_data) 8212 ether_addr_copy(link->conf->addr, 8213 sdata->u.mgd.assoc_data->link[link_id].addr); 8214 else if (!is_valid_ether_addr(link->conf->addr)) 8215 eth_random_addr(link->conf->addr); 8216 } 8217 8218 /* scan finished notification */ 8219 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8220 { 8221 struct ieee80211_sub_if_data *sdata; 8222 8223 /* Restart STA timers */ 8224 rcu_read_lock(); 8225 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8226 if (ieee80211_sdata_running(sdata)) 8227 ieee80211_restart_sta_timer(sdata); 8228 } 8229 rcu_read_unlock(); 8230 } 8231 8232 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8233 struct cfg80211_bss *cbss, s8 link_id, 8234 const u8 *ap_mld_addr, bool assoc, 8235 struct ieee80211_conn_settings *conn, 8236 bool override) 8237 { 8238 struct ieee80211_local *local = sdata->local; 8239 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8240 struct ieee80211_bss *bss = (void *)cbss->priv; 8241 struct sta_info *new_sta = NULL; 8242 struct ieee80211_link_data *link; 8243 bool have_sta = false; 8244 bool mlo; 8245 int err; 8246 8247 if (link_id >= 0) { 8248 mlo = true; 8249 if (WARN_ON(!ap_mld_addr)) 8250 return -EINVAL; 8251 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 8252 } else { 8253 if (WARN_ON(ap_mld_addr)) 8254 return -EINVAL; 8255 ap_mld_addr = cbss->bssid; 8256 err = ieee80211_vif_set_links(sdata, 0, 0); 8257 link_id = 0; 8258 mlo = false; 8259 } 8260 8261 if (err) 8262 return err; 8263 8264 link = sdata_dereference(sdata->link[link_id], sdata); 8265 if (WARN_ON(!link)) { 8266 err = -ENOLINK; 8267 goto out_err; 8268 } 8269 8270 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8271 err = -EINVAL; 8272 goto out_err; 8273 } 8274 8275 /* If a reconfig is happening, bail out */ 8276 if (local->in_reconfig) { 8277 err = -EBUSY; 8278 goto out_err; 8279 } 8280 8281 if (assoc) { 8282 rcu_read_lock(); 8283 have_sta = sta_info_get(sdata, ap_mld_addr); 8284 rcu_read_unlock(); 8285 } 8286 8287 if (!have_sta) { 8288 if (mlo) 8289 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8290 link_id, cbss->bssid, 8291 GFP_KERNEL); 8292 else 8293 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8294 8295 if (!new_sta) { 8296 err = -ENOMEM; 8297 goto out_err; 8298 } 8299 8300 new_sta->sta.mlo = mlo; 8301 } 8302 8303 /* 8304 * Set up the information for the new channel before setting the 8305 * new channel. We can't - completely race-free - change the basic 8306 * rates bitmap and the channel (sband) that it refers to, but if 8307 * we set it up before we at least avoid calling into the driver's 8308 * bss_info_changed() method with invalid information (since we do 8309 * call that from changing the channel - only for IDLE and perhaps 8310 * some others, but ...). 8311 * 8312 * So to avoid that, just set up all the new information before the 8313 * channel, but tell the driver to apply it only afterwards, since 8314 * it might need the new channel for that. 8315 */ 8316 if (new_sta) { 8317 const struct cfg80211_bss_ies *ies; 8318 struct link_sta_info *link_sta; 8319 8320 rcu_read_lock(); 8321 link_sta = rcu_dereference(new_sta->link[link_id]); 8322 if (WARN_ON(!link_sta)) { 8323 rcu_read_unlock(); 8324 sta_info_free(local, new_sta); 8325 err = -EINVAL; 8326 goto out_err; 8327 } 8328 8329 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8330 link_sta, cbss); 8331 if (err) { 8332 rcu_read_unlock(); 8333 sta_info_free(local, new_sta); 8334 goto out_err; 8335 } 8336 8337 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8338 8339 /* set timing information */ 8340 link->conf->beacon_int = cbss->beacon_interval; 8341 ies = rcu_dereference(cbss->beacon_ies); 8342 if (ies) { 8343 link->conf->sync_tsf = ies->tsf; 8344 link->conf->sync_device_ts = 8345 bss->device_ts_beacon; 8346 8347 ieee80211_get_dtim(ies, 8348 &link->conf->sync_dtim_count, 8349 NULL); 8350 } else if (!ieee80211_hw_check(&sdata->local->hw, 8351 TIMING_BEACON_ONLY)) { 8352 ies = rcu_dereference(cbss->proberesp_ies); 8353 /* must be non-NULL since beacon IEs were NULL */ 8354 link->conf->sync_tsf = ies->tsf; 8355 link->conf->sync_device_ts = 8356 bss->device_ts_presp; 8357 link->conf->sync_dtim_count = 0; 8358 } else { 8359 link->conf->sync_tsf = 0; 8360 link->conf->sync_device_ts = 0; 8361 link->conf->sync_dtim_count = 0; 8362 } 8363 rcu_read_unlock(); 8364 } 8365 8366 if (new_sta || override) { 8367 /* 8368 * Only set this if we're also going to calculate the AP 8369 * settings etc., otherwise this was set before in a 8370 * previous call. Note override is set to %true in assoc 8371 * if the settings were changed. 8372 */ 8373 link->u.mgd.conn = *conn; 8374 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 8375 mlo, &link->u.mgd.conn); 8376 if (err) { 8377 if (new_sta) 8378 sta_info_free(local, new_sta); 8379 goto out_err; 8380 } 8381 /* pass out for use in assoc */ 8382 *conn = link->u.mgd.conn; 8383 } 8384 8385 if (new_sta) { 8386 /* 8387 * tell driver about BSSID, basic rates and timing 8388 * this was set up above, before setting the channel 8389 */ 8390 ieee80211_link_info_change_notify(sdata, link, 8391 BSS_CHANGED_BSSID | 8392 BSS_CHANGED_BASIC_RATES | 8393 BSS_CHANGED_BEACON_INT); 8394 8395 if (assoc) 8396 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 8397 8398 err = sta_info_insert(new_sta); 8399 new_sta = NULL; 8400 if (err) { 8401 sdata_info(sdata, 8402 "failed to insert STA entry for the AP (error %d)\n", 8403 err); 8404 goto out_release_chan; 8405 } 8406 } else 8407 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 8408 8409 /* Cancel scan to ensure that nothing interferes with connection */ 8410 if (local->scanning) 8411 ieee80211_scan_cancel(local); 8412 8413 return 0; 8414 8415 out_release_chan: 8416 ieee80211_link_release_channel(link); 8417 out_err: 8418 ieee80211_vif_set_links(sdata, 0, 0); 8419 return err; 8420 } 8421 8422 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 8423 const struct cfg80211_bss_ies *ies, 8424 u8 cur_channel, bool ignore_ecsa) 8425 { 8426 const struct element *csa_elem, *ecsa_elem; 8427 struct ieee80211_channel_sw_ie *csa = NULL; 8428 struct ieee80211_ext_chansw_ie *ecsa = NULL; 8429 8430 if (!ies) 8431 return false; 8432 8433 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 8434 ies->data, ies->len); 8435 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 8436 csa = (void *)csa_elem->data; 8437 8438 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 8439 ies->data, ies->len); 8440 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 8441 ecsa = (void *)ecsa_elem->data; 8442 8443 if (csa && csa->count == 0) 8444 csa = NULL; 8445 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 8446 csa = NULL; 8447 8448 if (ecsa && ecsa->count == 0) 8449 ecsa = NULL; 8450 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 8451 ecsa = NULL; 8452 8453 if (ignore_ecsa && ecsa) { 8454 sdata_info(sdata, 8455 "Ignoring ECSA in probe response - was considered stuck!\n"); 8456 return csa; 8457 } 8458 8459 return csa || ecsa; 8460 } 8461 8462 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 8463 struct cfg80211_bss *bss) 8464 { 8465 u8 cur_channel; 8466 bool ret; 8467 8468 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 8469 8470 rcu_read_lock(); 8471 if (ieee80211_mgd_csa_present(sdata, 8472 rcu_dereference(bss->beacon_ies), 8473 cur_channel, false)) { 8474 ret = true; 8475 goto out; 8476 } 8477 8478 if (ieee80211_mgd_csa_present(sdata, 8479 rcu_dereference(bss->proberesp_ies), 8480 cur_channel, bss->proberesp_ecsa_stuck)) { 8481 ret = true; 8482 goto out; 8483 } 8484 8485 ret = false; 8486 out: 8487 rcu_read_unlock(); 8488 return ret; 8489 } 8490 8491 /* config hooks */ 8492 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 8493 struct cfg80211_auth_request *req) 8494 { 8495 struct ieee80211_local *local = sdata->local; 8496 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8497 struct ieee80211_mgd_auth_data *auth_data; 8498 struct ieee80211_conn_settings conn; 8499 struct ieee80211_link_data *link; 8500 struct ieee80211_supported_band *sband; 8501 struct ieee80211_bss *bss; 8502 u16 auth_alg; 8503 int err; 8504 bool cont_auth, wmm_used; 8505 8506 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8507 8508 /* prepare auth data structure */ 8509 8510 switch (req->auth_type) { 8511 case NL80211_AUTHTYPE_OPEN_SYSTEM: 8512 auth_alg = WLAN_AUTH_OPEN; 8513 break; 8514 case NL80211_AUTHTYPE_SHARED_KEY: 8515 if (fips_enabled) 8516 return -EOPNOTSUPP; 8517 auth_alg = WLAN_AUTH_SHARED_KEY; 8518 break; 8519 case NL80211_AUTHTYPE_FT: 8520 auth_alg = WLAN_AUTH_FT; 8521 break; 8522 case NL80211_AUTHTYPE_NETWORK_EAP: 8523 auth_alg = WLAN_AUTH_LEAP; 8524 break; 8525 case NL80211_AUTHTYPE_SAE: 8526 auth_alg = WLAN_AUTH_SAE; 8527 break; 8528 case NL80211_AUTHTYPE_FILS_SK: 8529 auth_alg = WLAN_AUTH_FILS_SK; 8530 break; 8531 case NL80211_AUTHTYPE_FILS_SK_PFS: 8532 auth_alg = WLAN_AUTH_FILS_SK_PFS; 8533 break; 8534 case NL80211_AUTHTYPE_FILS_PK: 8535 auth_alg = WLAN_AUTH_FILS_PK; 8536 break; 8537 default: 8538 return -EOPNOTSUPP; 8539 } 8540 8541 if (ifmgd->assoc_data) 8542 return -EBUSY; 8543 8544 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 8545 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 8546 return -EINVAL; 8547 } 8548 8549 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 8550 req->ie_len, GFP_KERNEL); 8551 if (!auth_data) 8552 return -ENOMEM; 8553 8554 memcpy(auth_data->ap_addr, 8555 req->ap_mld_addr ?: req->bss->bssid, 8556 ETH_ALEN); 8557 auth_data->bss = req->bss; 8558 auth_data->link_id = req->link_id; 8559 8560 if (req->auth_data_len >= 4) { 8561 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 8562 __le16 *pos = (__le16 *) req->auth_data; 8563 8564 auth_data->sae_trans = le16_to_cpu(pos[0]); 8565 auth_data->sae_status = le16_to_cpu(pos[1]); 8566 } 8567 memcpy(auth_data->data, req->auth_data + 4, 8568 req->auth_data_len - 4); 8569 auth_data->data_len += req->auth_data_len - 4; 8570 } 8571 8572 /* Check if continuing authentication or trying to authenticate with the 8573 * same BSS that we were in the process of authenticating with and avoid 8574 * removal and re-addition of the STA entry in 8575 * ieee80211_prep_connection(). 8576 */ 8577 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 8578 ifmgd->auth_data->link_id == req->link_id; 8579 8580 if (req->ie && req->ie_len) { 8581 memcpy(&auth_data->data[auth_data->data_len], 8582 req->ie, req->ie_len); 8583 auth_data->data_len += req->ie_len; 8584 } 8585 8586 if (req->key && req->key_len) { 8587 auth_data->key_len = req->key_len; 8588 auth_data->key_idx = req->key_idx; 8589 memcpy(auth_data->key, req->key, req->key_len); 8590 } 8591 8592 auth_data->algorithm = auth_alg; 8593 8594 /* try to authenticate/probe */ 8595 8596 if (ifmgd->auth_data) { 8597 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 8598 auth_data->peer_confirmed = 8599 ifmgd->auth_data->peer_confirmed; 8600 } 8601 ieee80211_destroy_auth_data(sdata, cont_auth); 8602 } 8603 8604 /* prep auth_data so we don't go into idle on disassoc */ 8605 ifmgd->auth_data = auth_data; 8606 8607 /* If this is continuation of an ongoing SAE authentication exchange 8608 * (i.e., request to send SAE Confirm) and the peer has already 8609 * confirmed, mark authentication completed since we are about to send 8610 * out SAE Confirm. 8611 */ 8612 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 8613 auth_data->peer_confirmed && auth_data->sae_trans == 2) 8614 ieee80211_mark_sta_auth(sdata); 8615 8616 if (ifmgd->associated) { 8617 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8618 8619 sdata_info(sdata, 8620 "disconnect from AP %pM for new auth to %pM\n", 8621 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 8622 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8623 WLAN_REASON_UNSPECIFIED, 8624 false, frame_buf); 8625 8626 ieee80211_report_disconnect(sdata, frame_buf, 8627 sizeof(frame_buf), true, 8628 WLAN_REASON_UNSPECIFIED, 8629 false); 8630 } 8631 8632 /* needed for transmitting the auth frame(s) properly */ 8633 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 8634 8635 bss = (void *)req->bss->priv; 8636 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 8637 8638 sband = local->hw.wiphy->bands[req->bss->channel->band]; 8639 8640 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 8641 &conn); 8642 8643 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 8644 req->ap_mld_addr, cont_auth, 8645 &conn, false); 8646 if (err) 8647 goto err_clear; 8648 8649 if (req->link_id >= 0) 8650 link = sdata_dereference(sdata->link[req->link_id], sdata); 8651 else 8652 link = &sdata->deflink; 8653 8654 if (WARN_ON(!link)) { 8655 err = -ENOLINK; 8656 goto err_clear; 8657 } 8658 8659 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 8660 auth_data->ap_addr, link->conf->addr); 8661 8662 err = ieee80211_auth(sdata); 8663 if (err) { 8664 sta_info_destroy_addr(sdata, auth_data->ap_addr); 8665 goto err_clear; 8666 } 8667 8668 /* hold our own reference */ 8669 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 8670 return 0; 8671 8672 err_clear: 8673 if (!ieee80211_vif_is_mld(&sdata->vif)) { 8674 eth_zero_addr(sdata->deflink.u.mgd.bssid); 8675 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 8676 BSS_CHANGED_BSSID); 8677 ieee80211_link_release_channel(&sdata->deflink); 8678 } 8679 ifmgd->auth_data = NULL; 8680 kfree(auth_data); 8681 return err; 8682 } 8683 8684 static void 8685 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 8686 struct ieee80211_mgd_assoc_data *assoc_data, 8687 struct cfg80211_assoc_request *req, 8688 struct ieee80211_conn_settings *conn, 8689 unsigned int link_id) 8690 { 8691 struct ieee80211_local *local = sdata->local; 8692 const struct cfg80211_bss_ies *bss_ies; 8693 struct ieee80211_supported_band *sband; 8694 struct ieee80211_link_data *link; 8695 struct cfg80211_bss *cbss; 8696 struct ieee80211_bss *bss; 8697 8698 cbss = assoc_data->link[link_id].bss; 8699 if (WARN_ON(!cbss)) 8700 return; 8701 8702 bss = (void *)cbss->priv; 8703 8704 sband = local->hw.wiphy->bands[cbss->channel->band]; 8705 if (WARN_ON(!sband)) 8706 return; 8707 8708 link = sdata_dereference(sdata->link[link_id], sdata); 8709 if (WARN_ON(!link)) 8710 return; 8711 8712 /* for MLO connections assume advertising all rates is OK */ 8713 if (!req->ap_mld_addr) { 8714 assoc_data->supp_rates = bss->supp_rates; 8715 assoc_data->supp_rates_len = bss->supp_rates_len; 8716 } 8717 8718 /* copy and link elems for the STA profile */ 8719 if (req->links[link_id].elems_len) { 8720 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 8721 req->links[link_id].elems_len); 8722 assoc_data->link[link_id].elems = assoc_data->ie_pos; 8723 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 8724 assoc_data->ie_pos += req->links[link_id].elems_len; 8725 } 8726 8727 link->u.mgd.beacon_crc_valid = false; 8728 link->u.mgd.dtim_period = 0; 8729 link->u.mgd.have_beacon = false; 8730 8731 /* override HT configuration only if the AP and we support it */ 8732 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 8733 struct ieee80211_sta_ht_cap sta_ht_cap; 8734 8735 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 8736 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 8737 } 8738 8739 rcu_read_lock(); 8740 bss_ies = rcu_dereference(cbss->beacon_ies); 8741 if (bss_ies) { 8742 u8 dtim_count = 0; 8743 8744 ieee80211_get_dtim(bss_ies, &dtim_count, 8745 &link->u.mgd.dtim_period); 8746 8747 sdata->deflink.u.mgd.have_beacon = true; 8748 8749 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 8750 link->conf->sync_tsf = bss_ies->tsf; 8751 link->conf->sync_device_ts = bss->device_ts_beacon; 8752 link->conf->sync_dtim_count = dtim_count; 8753 } 8754 } else { 8755 bss_ies = rcu_dereference(cbss->ies); 8756 } 8757 8758 if (bss_ies) { 8759 const struct element *elem; 8760 8761 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 8762 bss_ies->data, bss_ies->len); 8763 if (elem && elem->datalen >= 3) 8764 link->conf->profile_periodicity = elem->data[2]; 8765 else 8766 link->conf->profile_periodicity = 0; 8767 8768 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 8769 bss_ies->data, bss_ies->len); 8770 if (elem && elem->datalen >= 11 && 8771 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 8772 link->conf->ema_ap = true; 8773 else 8774 link->conf->ema_ap = false; 8775 } 8776 rcu_read_unlock(); 8777 8778 if (bss->corrupt_data) { 8779 char *corrupt_type = "data"; 8780 8781 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 8782 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 8783 corrupt_type = "beacon and probe response"; 8784 else 8785 corrupt_type = "beacon"; 8786 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 8787 corrupt_type = "probe response"; 8788 } 8789 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 8790 cbss->bssid, corrupt_type); 8791 } 8792 8793 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 8794 if (sdata->u.mgd.powersave) 8795 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 8796 else 8797 link->smps_mode = IEEE80211_SMPS_OFF; 8798 } else { 8799 link->smps_mode = link->u.mgd.req_smps; 8800 } 8801 } 8802 8803 static int 8804 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 8805 struct ieee80211_mgd_assoc_data *assoc_data, 8806 int link_id) 8807 { 8808 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 8809 enum nl80211_band band = cbss->channel->band; 8810 struct ieee80211_supported_band *sband; 8811 const struct element *elem; 8812 int err; 8813 8814 /* neither HT nor VHT elements used on 6 GHz */ 8815 if (band == NL80211_BAND_6GHZ) 8816 return 0; 8817 8818 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 8819 return 0; 8820 8821 rcu_read_lock(); 8822 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 8823 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 8824 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 8825 cbss->bssid); 8826 err = -EINVAL; 8827 goto out_rcu; 8828 } 8829 assoc_data->link[link_id].ap_ht_param = 8830 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 8831 rcu_read_unlock(); 8832 8833 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 8834 return 0; 8835 8836 /* some drivers want to support VHT on 2.4 GHz even */ 8837 sband = sdata->local->hw.wiphy->bands[band]; 8838 if (!sband->vht_cap.vht_supported) 8839 return 0; 8840 8841 rcu_read_lock(); 8842 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 8843 /* but even then accept it not being present on the AP */ 8844 if (!elem && band == NL80211_BAND_2GHZ) { 8845 err = 0; 8846 goto out_rcu; 8847 } 8848 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 8849 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 8850 cbss->bssid); 8851 err = -EINVAL; 8852 goto out_rcu; 8853 } 8854 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 8855 sizeof(struct ieee80211_vht_cap)); 8856 rcu_read_unlock(); 8857 8858 return 0; 8859 out_rcu: 8860 rcu_read_unlock(); 8861 return err; 8862 } 8863 8864 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 8865 struct cfg80211_assoc_request *req) 8866 { 8867 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 8868 struct ieee80211_local *local = sdata->local; 8869 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8870 struct ieee80211_mgd_assoc_data *assoc_data; 8871 const struct element *ssid_elem; 8872 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 8873 struct ieee80211_link_data *link; 8874 struct cfg80211_bss *cbss; 8875 bool override, uapsd_supported; 8876 bool match_auth; 8877 int i, err; 8878 size_t size = sizeof(*assoc_data) + req->ie_len; 8879 8880 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 8881 size += req->links[i].elems_len; 8882 8883 /* FIXME: no support for 4-addr MLO yet */ 8884 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 8885 return -EOPNOTSUPP; 8886 8887 assoc_data = kzalloc(size, GFP_KERNEL); 8888 if (!assoc_data) 8889 return -ENOMEM; 8890 8891 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 8892 8893 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 8894 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 8895 err = -EINVAL; 8896 goto err_free; 8897 } 8898 8899 rcu_read_lock(); 8900 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 8901 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 8902 rcu_read_unlock(); 8903 err = -EINVAL; 8904 goto err_free; 8905 } 8906 8907 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 8908 assoc_data->ssid_len = ssid_elem->datalen; 8909 rcu_read_unlock(); 8910 8911 if (req->ap_mld_addr) 8912 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 8913 else 8914 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 8915 8916 if (ifmgd->associated) { 8917 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8918 8919 sdata_info(sdata, 8920 "disconnect from AP %pM for new assoc to %pM\n", 8921 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 8922 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8923 WLAN_REASON_UNSPECIFIED, 8924 false, frame_buf); 8925 8926 ieee80211_report_disconnect(sdata, frame_buf, 8927 sizeof(frame_buf), true, 8928 WLAN_REASON_UNSPECIFIED, 8929 false); 8930 } 8931 8932 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 8933 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 8934 sizeof(ifmgd->ht_capa_mask)); 8935 8936 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 8937 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 8938 sizeof(ifmgd->vht_capa_mask)); 8939 8940 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 8941 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 8942 sizeof(ifmgd->s1g_capa_mask)); 8943 8944 /* keep some setup (AP STA, channel, ...) if matching */ 8945 match_auth = ifmgd->auth_data && 8946 ether_addr_equal(ifmgd->auth_data->ap_addr, 8947 assoc_data->ap_addr) && 8948 ifmgd->auth_data->link_id == req->link_id; 8949 8950 if (req->ap_mld_addr) { 8951 uapsd_supported = true; 8952 8953 if (req->flags & (ASSOC_REQ_DISABLE_HT | 8954 ASSOC_REQ_DISABLE_VHT | 8955 ASSOC_REQ_DISABLE_HE | 8956 ASSOC_REQ_DISABLE_EHT)) { 8957 err = -EINVAL; 8958 goto err_free; 8959 } 8960 8961 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 8962 struct ieee80211_supported_band *sband; 8963 struct cfg80211_bss *link_cbss = req->links[i].bss; 8964 struct ieee80211_bss *bss; 8965 8966 if (!link_cbss) 8967 continue; 8968 8969 bss = (void *)link_cbss->priv; 8970 8971 if (!bss->wmm_used) { 8972 err = -EINVAL; 8973 req->links[i].error = err; 8974 goto err_free; 8975 } 8976 8977 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 8978 err = -EINVAL; 8979 req->links[i].error = err; 8980 goto err_free; 8981 } 8982 8983 link = sdata_dereference(sdata->link[i], sdata); 8984 if (link) 8985 ether_addr_copy(assoc_data->link[i].addr, 8986 link->conf->addr); 8987 else 8988 eth_random_addr(assoc_data->link[i].addr); 8989 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 8990 8991 if (match_auth && i == assoc_link_id && link) 8992 assoc_data->link[i].conn = link->u.mgd.conn; 8993 else 8994 assoc_data->link[i].conn = 8995 ieee80211_conn_settings_unlimited; 8996 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 8997 req, true, i, 8998 &assoc_data->link[i].conn); 8999 assoc_data->link[i].bss = link_cbss; 9000 assoc_data->link[i].disabled = req->links[i].disabled; 9001 9002 if (!bss->uapsd_supported) 9003 uapsd_supported = false; 9004 9005 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9006 err = -EINVAL; 9007 req->links[i].error = err; 9008 goto err_free; 9009 } 9010 9011 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9012 assoc_data, i); 9013 if (err) { 9014 err = -EINVAL; 9015 req->links[i].error = err; 9016 goto err_free; 9017 } 9018 } 9019 9020 assoc_data->wmm = true; 9021 } else { 9022 struct ieee80211_supported_band *sband; 9023 struct ieee80211_bss *bss = (void *)cbss->priv; 9024 9025 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9026 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9027 9028 assoc_data->wmm = bss->wmm_used && 9029 (local->hw.queues >= IEEE80211_NUM_ACS); 9030 9031 if (cbss->channel->band == NL80211_BAND_6GHZ && 9032 req->flags & (ASSOC_REQ_DISABLE_HT | 9033 ASSOC_REQ_DISABLE_VHT | 9034 ASSOC_REQ_DISABLE_HE)) { 9035 err = -EINVAL; 9036 goto err_free; 9037 } 9038 9039 sband = local->hw.wiphy->bands[cbss->channel->band]; 9040 9041 assoc_data->link[0].bss = cbss; 9042 9043 if (match_auth) 9044 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9045 else 9046 assoc_data->link[0].conn = 9047 ieee80211_conn_settings_unlimited; 9048 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9049 assoc_data->wmm, 0, 9050 &assoc_data->link[0].conn); 9051 9052 uapsd_supported = bss->uapsd_supported; 9053 9054 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9055 if (err) 9056 goto err_free; 9057 } 9058 9059 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9060 9061 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9062 err = -EBUSY; 9063 goto err_free; 9064 } 9065 9066 if (ifmgd->assoc_data) { 9067 err = -EBUSY; 9068 goto err_free; 9069 } 9070 9071 /* Cleanup is delayed if auth_data matches */ 9072 if (ifmgd->auth_data && !match_auth) 9073 ieee80211_destroy_auth_data(sdata, false); 9074 9075 if (req->ie && req->ie_len) { 9076 memcpy(assoc_data->ie, req->ie, req->ie_len); 9077 assoc_data->ie_len = req->ie_len; 9078 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9079 } else { 9080 assoc_data->ie_pos = assoc_data->ie; 9081 } 9082 9083 if (req->fils_kek) { 9084 /* should already be checked in cfg80211 - so warn */ 9085 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9086 err = -EINVAL; 9087 goto err_free; 9088 } 9089 memcpy(assoc_data->fils_kek, req->fils_kek, 9090 req->fils_kek_len); 9091 assoc_data->fils_kek_len = req->fils_kek_len; 9092 } 9093 9094 if (req->fils_nonces) 9095 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9096 2 * FILS_NONCE_LEN); 9097 9098 /* default timeout */ 9099 assoc_data->timeout = jiffies; 9100 assoc_data->timeout_started = true; 9101 9102 assoc_data->assoc_link_id = assoc_link_id; 9103 9104 if (req->ap_mld_addr) { 9105 /* if there was no authentication, set up the link */ 9106 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9107 if (err) 9108 goto err_clear; 9109 } 9110 9111 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9112 if (WARN_ON(!link)) { 9113 err = -EINVAL; 9114 goto err_clear; 9115 } 9116 9117 override = link->u.mgd.conn.mode != 9118 assoc_data->link[assoc_link_id].conn.mode || 9119 link->u.mgd.conn.bw_limit != 9120 assoc_data->link[assoc_link_id].conn.bw_limit; 9121 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9122 9123 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9124 assoc_link_id); 9125 9126 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9127 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9128 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9129 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9130 9131 if (assoc_data->wmm && uapsd_supported && 9132 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9133 assoc_data->uapsd = true; 9134 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9135 } else { 9136 assoc_data->uapsd = false; 9137 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9138 } 9139 9140 if (req->prev_bssid) 9141 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9142 9143 if (req->use_mfp) { 9144 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9145 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9146 } else { 9147 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9148 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9149 } 9150 9151 if (req->flags & ASSOC_REQ_USE_RRM) 9152 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9153 else 9154 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9155 9156 if (req->crypto.control_port) 9157 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9158 else 9159 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9160 9161 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9162 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9163 sdata->control_port_over_nl80211 = 9164 req->crypto.control_port_over_nl80211; 9165 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9166 9167 /* kick off associate process */ 9168 ifmgd->assoc_data = assoc_data; 9169 9170 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9171 if (!assoc_data->link[i].bss) 9172 continue; 9173 if (i == assoc_data->assoc_link_id) 9174 continue; 9175 /* only calculate the mode, hence link == NULL */ 9176 err = ieee80211_prep_channel(sdata, NULL, i, 9177 assoc_data->link[i].bss, true, 9178 &assoc_data->link[i].conn); 9179 if (err) { 9180 req->links[i].error = err; 9181 goto err_clear; 9182 } 9183 } 9184 9185 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9186 vif_cfg->ssid_len = assoc_data->ssid_len; 9187 9188 /* needed for transmitting the assoc frames properly */ 9189 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9190 9191 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9192 req->ap_mld_addr, true, 9193 &assoc_data->link[assoc_link_id].conn, 9194 override); 9195 if (err) 9196 goto err_clear; 9197 9198 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9199 const struct cfg80211_bss_ies *beacon_ies; 9200 9201 rcu_read_lock(); 9202 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9203 if (!beacon_ies) { 9204 /* 9205 * Wait up to one beacon interval ... 9206 * should this be more if we miss one? 9207 */ 9208 sdata_info(sdata, "waiting for beacon from %pM\n", 9209 link->u.mgd.bssid); 9210 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9211 assoc_data->timeout_started = true; 9212 assoc_data->need_beacon = true; 9213 } 9214 rcu_read_unlock(); 9215 } 9216 9217 run_again(sdata, assoc_data->timeout); 9218 9219 /* We are associating, clean up auth_data */ 9220 if (ifmgd->auth_data) 9221 ieee80211_destroy_auth_data(sdata, true); 9222 9223 return 0; 9224 err_clear: 9225 if (!ifmgd->auth_data) { 9226 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9227 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9228 BSS_CHANGED_BSSID); 9229 } 9230 ifmgd->assoc_data = NULL; 9231 err_free: 9232 kfree(assoc_data); 9233 return err; 9234 } 9235 9236 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9237 struct cfg80211_deauth_request *req) 9238 { 9239 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9240 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9241 bool tx = !req->local_state_change; 9242 struct ieee80211_prep_tx_info info = { 9243 .subtype = IEEE80211_STYPE_DEAUTH, 9244 }; 9245 9246 if (ifmgd->auth_data && 9247 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9248 sdata_info(sdata, 9249 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9250 req->bssid, req->reason_code, 9251 ieee80211_get_reason_code_string(req->reason_code)); 9252 9253 info.link_id = ifmgd->auth_data->link_id; 9254 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9255 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9256 IEEE80211_STYPE_DEAUTH, 9257 req->reason_code, tx, 9258 frame_buf); 9259 ieee80211_destroy_auth_data(sdata, false); 9260 ieee80211_report_disconnect(sdata, frame_buf, 9261 sizeof(frame_buf), true, 9262 req->reason_code, false); 9263 drv_mgd_complete_tx(sdata->local, sdata, &info); 9264 return 0; 9265 } 9266 9267 if (ifmgd->assoc_data && 9268 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 9269 sdata_info(sdata, 9270 "aborting association with %pM by local choice (Reason: %u=%s)\n", 9271 req->bssid, req->reason_code, 9272 ieee80211_get_reason_code_string(req->reason_code)); 9273 9274 info.link_id = ifmgd->assoc_data->assoc_link_id; 9275 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9276 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9277 IEEE80211_STYPE_DEAUTH, 9278 req->reason_code, tx, 9279 frame_buf); 9280 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9281 ieee80211_report_disconnect(sdata, frame_buf, 9282 sizeof(frame_buf), true, 9283 req->reason_code, false); 9284 drv_mgd_complete_tx(sdata->local, sdata, &info); 9285 return 0; 9286 } 9287 9288 if (ifmgd->associated && 9289 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 9290 sdata_info(sdata, 9291 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 9292 req->bssid, req->reason_code, 9293 ieee80211_get_reason_code_string(req->reason_code)); 9294 9295 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9296 req->reason_code, tx, frame_buf); 9297 ieee80211_report_disconnect(sdata, frame_buf, 9298 sizeof(frame_buf), true, 9299 req->reason_code, false); 9300 drv_mgd_complete_tx(sdata->local, sdata, &info); 9301 return 0; 9302 } 9303 9304 return -ENOTCONN; 9305 } 9306 9307 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 9308 struct cfg80211_disassoc_request *req) 9309 { 9310 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9311 9312 if (!sdata->u.mgd.associated || 9313 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 9314 return -ENOTCONN; 9315 9316 sdata_info(sdata, 9317 "disassociating from %pM by local choice (Reason: %u=%s)\n", 9318 req->ap_addr, req->reason_code, 9319 ieee80211_get_reason_code_string(req->reason_code)); 9320 9321 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 9322 req->reason_code, !req->local_state_change, 9323 frame_buf); 9324 9325 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 9326 req->reason_code, false); 9327 9328 return 0; 9329 } 9330 9331 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 9332 { 9333 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9334 &link->u.mgd.request_smps_work); 9335 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9336 &link->u.mgd.recalc_smps); 9337 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 9338 &link->u.mgd.csa.switch_work); 9339 } 9340 9341 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 9342 { 9343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9344 9345 /* 9346 * Make sure some work items will not run after this, 9347 * they will not do anything but might not have been 9348 * cancelled when disconnecting. 9349 */ 9350 wiphy_work_cancel(sdata->local->hw.wiphy, 9351 &ifmgd->monitor_work); 9352 wiphy_work_cancel(sdata->local->hw.wiphy, 9353 &ifmgd->beacon_connection_loss_work); 9354 wiphy_work_cancel(sdata->local->hw.wiphy, 9355 &ifmgd->csa_connection_drop_work); 9356 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 9357 &ifmgd->tdls_peer_del_work); 9358 9359 if (ifmgd->assoc_data) 9360 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 9361 if (ifmgd->auth_data) 9362 ieee80211_destroy_auth_data(sdata, false); 9363 spin_lock_bh(&ifmgd->teardown_lock); 9364 if (ifmgd->teardown_skb) { 9365 kfree_skb(ifmgd->teardown_skb); 9366 ifmgd->teardown_skb = NULL; 9367 ifmgd->orig_teardown_skb = NULL; 9368 } 9369 kfree(ifmgd->assoc_req_ies); 9370 ifmgd->assoc_req_ies = NULL; 9371 ifmgd->assoc_req_ies_len = 0; 9372 spin_unlock_bh(&ifmgd->teardown_lock); 9373 del_timer_sync(&ifmgd->timer); 9374 } 9375 9376 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 9377 enum nl80211_cqm_rssi_threshold_event rssi_event, 9378 s32 rssi_level, 9379 gfp_t gfp) 9380 { 9381 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9382 9383 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 9384 9385 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 9386 } 9387 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 9388 9389 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 9390 { 9391 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9392 9393 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 9394 9395 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 9396 } 9397 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 9398 9399 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 9400 int rssi_min_thold, 9401 int rssi_max_thold) 9402 { 9403 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 9404 9405 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 9406 return; 9407 9408 /* 9409 * Scale up threshold values before storing it, as the RSSI averaging 9410 * algorithm uses a scaled up value as well. Change this scaling 9411 * factor if the RSSI averaging algorithm changes. 9412 */ 9413 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 9414 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 9415 } 9416 9417 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 9418 int rssi_min_thold, 9419 int rssi_max_thold) 9420 { 9421 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9422 9423 WARN_ON(rssi_min_thold == rssi_max_thold || 9424 rssi_min_thold > rssi_max_thold); 9425 9426 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 9427 rssi_max_thold); 9428 } 9429 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 9430 9431 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 9432 { 9433 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9434 9435 _ieee80211_enable_rssi_reports(sdata, 0, 0); 9436 } 9437 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 9438