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 <asm/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 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 44 #define IEEE80211_ASSOC_MAX_TRIES 3 45 46 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100) 47 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 48 49 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 50 51 static int max_nullfunc_tries = 2; 52 module_param(max_nullfunc_tries, int, 0644); 53 MODULE_PARM_DESC(max_nullfunc_tries, 54 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 55 56 static int max_probe_tries = 5; 57 module_param(max_probe_tries, int, 0644); 58 MODULE_PARM_DESC(max_probe_tries, 59 "Maximum probe tries before disconnecting (reason 4)."); 60 61 /* 62 * Beacon loss timeout is calculated as N frames times the 63 * advertised beacon interval. This may need to be somewhat 64 * higher than what hardware might detect to account for 65 * delays in the host processing frames. But since we also 66 * probe on beacon miss before declaring the connection lost 67 * default to what we want. 68 */ 69 static int beacon_loss_count = 7; 70 module_param(beacon_loss_count, int, 0644); 71 MODULE_PARM_DESC(beacon_loss_count, 72 "Number of beacon intervals before we decide beacon was lost."); 73 74 /* 75 * Time the connection can be idle before we probe 76 * it to see if we can still talk to the AP. 77 */ 78 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 79 /* 80 * Time we wait for a probe response after sending 81 * a probe request because of beacon loss or for 82 * checking the connection still works. 83 */ 84 static int probe_wait_ms = 500; 85 module_param(probe_wait_ms, int, 0644); 86 MODULE_PARM_DESC(probe_wait_ms, 87 "Maximum time(ms) to wait for probe response" 88 " before disconnecting (reason 4)."); 89 90 /* 91 * How many Beacon frames need to have been used in average signal strength 92 * before starting to indicate signal change events. 93 */ 94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 95 96 /* 97 * We can have multiple work items (and connection probing) 98 * scheduling this timer, but we need to take care to only 99 * reschedule it when it should fire _earlier_ than it was 100 * asked for before, or if it's not pending right now. This 101 * function ensures that. Note that it then is required to 102 * run this function for all timeouts after the first one 103 * has happened -- the work that runs from this timer will 104 * do that. 105 */ 106 static void run_again(struct ieee80211_sub_if_data *sdata, 107 unsigned long timeout) 108 { 109 lockdep_assert_wiphy(sdata->local->hw.wiphy); 110 111 if (!timer_pending(&sdata->u.mgd.timer) || 112 time_before(timeout, sdata->u.mgd.timer.expires)) 113 mod_timer(&sdata->u.mgd.timer, timeout); 114 } 115 116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 117 { 118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 119 return; 120 121 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 122 return; 123 124 mod_timer(&sdata->u.mgd.bcn_mon_timer, 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 126 } 127 128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 129 { 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 131 132 if (unlikely(!ifmgd->associated)) 133 return; 134 135 if (ifmgd->probe_send_count) 136 ifmgd->probe_send_count = 0; 137 138 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 139 return; 140 141 mod_timer(&ifmgd->conn_mon_timer, 142 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 143 } 144 145 static int ecw2cw(int ecw) 146 { 147 return (1 << ecw) - 1; 148 } 149 150 static enum ieee80211_conn_mode 151 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 152 struct ieee80211_channel *channel, 153 u32 vht_cap_info, 154 const struct ieee802_11_elems *elems, 155 bool ignore_ht_channel_mismatch, 156 const struct ieee80211_conn_settings *conn, 157 struct cfg80211_chan_def *chandef) 158 { 159 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 160 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 161 const struct ieee80211_he_operation *he_oper = elems->he_operation; 162 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 163 struct ieee80211_supported_band *sband = 164 sdata->local->hw.wiphy->bands[channel->band]; 165 struct cfg80211_chan_def vht_chandef; 166 bool no_vht = false; 167 u32 ht_cfreq; 168 169 *chandef = (struct cfg80211_chan_def) { 170 .chan = channel, 171 .width = NL80211_CHAN_WIDTH_20_NOHT, 172 .center_freq1 = channel->center_freq, 173 .freq1_offset = channel->freq_offset, 174 }; 175 176 /* get special S1G case out of the way */ 177 if (sband->band == NL80211_BAND_S1GHZ) { 178 if (!ieee80211_chandef_s1g_oper(elems->s1g_oper, chandef)) { 179 sdata_info(sdata, 180 "Missing S1G Operation Element? Trying operating == primary\n"); 181 chandef->width = ieee80211_s1g_channel_width(channel); 182 } 183 184 return IEEE80211_CONN_MODE_S1G; 185 } 186 187 /* get special 6 GHz case out of the way */ 188 if (sband->band == NL80211_BAND_6GHZ) { 189 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 190 191 /* this is an error */ 192 if (conn->mode < IEEE80211_CONN_MODE_HE) 193 return IEEE80211_CONN_MODE_LEGACY; 194 195 if (!elems->he_6ghz_capa || !elems->he_cap) { 196 sdata_info(sdata, 197 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 198 return IEEE80211_CONN_MODE_LEGACY; 199 } 200 201 if (!eht_oper || !elems->eht_cap) { 202 eht_oper = NULL; 203 mode = IEEE80211_CONN_MODE_HE; 204 } 205 206 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 207 eht_oper, chandef)) { 208 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 209 return IEEE80211_CONN_MODE_LEGACY; 210 } 211 212 return mode; 213 } 214 215 /* now we have the progression HT, VHT, ... */ 216 if (conn->mode < IEEE80211_CONN_MODE_HT) 217 return IEEE80211_CONN_MODE_LEGACY; 218 219 if (!ht_oper || !elems->ht_cap_elem) 220 return IEEE80211_CONN_MODE_LEGACY; 221 222 chandef->width = NL80211_CHAN_WIDTH_20; 223 224 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 225 channel->band); 226 /* check that channel matches the right operating channel */ 227 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 228 /* 229 * It's possible that some APs are confused here; 230 * Netgear WNDR3700 sometimes reports 4 higher than 231 * the actual channel in association responses, but 232 * since we look at probe response/beacon data here 233 * it should be OK. 234 */ 235 sdata_info(sdata, 236 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 237 channel->center_freq, ht_cfreq, 238 ht_oper->primary_chan, channel->band); 239 return IEEE80211_CONN_MODE_LEGACY; 240 } 241 242 ieee80211_chandef_ht_oper(ht_oper, chandef); 243 244 if (conn->mode < IEEE80211_CONN_MODE_VHT) 245 return IEEE80211_CONN_MODE_HT; 246 247 vht_chandef = *chandef; 248 249 /* 250 * having he_cap/he_oper parsed out implies we're at 251 * least operating as HE STA 252 */ 253 if (elems->he_cap && he_oper && 254 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 255 struct ieee80211_vht_operation he_oper_vht_cap; 256 257 /* 258 * Set only first 3 bytes (other 2 aren't used in 259 * ieee80211_chandef_vht_oper() anyway) 260 */ 261 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 262 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 263 264 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 265 &he_oper_vht_cap, ht_oper, 266 &vht_chandef)) { 267 sdata_info(sdata, 268 "HE AP VHT information is invalid, disabling HE\n"); 269 /* this will cause us to re-parse as VHT STA */ 270 return IEEE80211_CONN_MODE_VHT; 271 } 272 } else if (!vht_oper || !elems->vht_cap_elem) { 273 if (sband->band == NL80211_BAND_5GHZ) { 274 sdata_info(sdata, 275 "VHT information is missing, disabling VHT\n"); 276 return IEEE80211_CONN_MODE_HT; 277 } 278 no_vht = true; 279 } else if (sband->band == NL80211_BAND_2GHZ) { 280 no_vht = true; 281 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 282 vht_cap_info, 283 vht_oper, ht_oper, 284 &vht_chandef)) { 285 sdata_info(sdata, 286 "AP VHT information is invalid, disabling VHT\n"); 287 return IEEE80211_CONN_MODE_HT; 288 } 289 290 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 291 sdata_info(sdata, 292 "AP VHT information doesn't match HT, disabling VHT\n"); 293 return IEEE80211_CONN_MODE_HT; 294 } 295 296 *chandef = vht_chandef; 297 298 /* stick to current max mode if we or the AP don't have HE */ 299 if (conn->mode < IEEE80211_CONN_MODE_HE || 300 !elems->he_operation || !elems->he_cap) { 301 if (no_vht) 302 return IEEE80211_CONN_MODE_HT; 303 return IEEE80211_CONN_MODE_VHT; 304 } 305 306 /* stick to HE if we or the AP don't have EHT */ 307 if (conn->mode < IEEE80211_CONN_MODE_EHT || 308 !eht_oper || !elems->eht_cap) 309 return IEEE80211_CONN_MODE_HE; 310 311 /* 312 * handle the case that the EHT operation indicates that it holds EHT 313 * operation information (in case that the channel width differs from 314 * the channel width reported in HT/VHT/HE). 315 */ 316 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 317 struct cfg80211_chan_def eht_chandef = *chandef; 318 319 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 320 &eht_chandef); 321 322 eht_chandef.punctured = 323 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 324 325 if (!cfg80211_chandef_valid(&eht_chandef)) { 326 sdata_info(sdata, 327 "AP EHT information is invalid, disabling EHT\n"); 328 return IEEE80211_CONN_MODE_HE; 329 } 330 331 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 332 sdata_info(sdata, 333 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 334 return IEEE80211_CONN_MODE_HE; 335 } 336 337 *chandef = eht_chandef; 338 } 339 340 return IEEE80211_CONN_MODE_EHT; 341 } 342 343 static bool 344 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 345 const struct ieee80211_he_cap_elem *he_cap, 346 const struct ieee80211_he_operation *he_op) 347 { 348 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 349 u16 mcs_80_map_tx, mcs_80_map_rx; 350 u16 ap_min_req_set; 351 int nss; 352 353 if (!he_cap) 354 return false; 355 356 /* mcs_nss is right after he_cap info */ 357 he_mcs_nss_supp = (void *)(he_cap + 1); 358 359 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 360 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 361 362 /* P802.11-REVme/D0.3 363 * 27.1.1 Introduction to the HE PHY 364 * ... 365 * An HE STA shall support the following features: 366 * ... 367 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 368 * supported channel widths for HE SU PPDUs 369 */ 370 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 371 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 372 sdata_info(sdata, 373 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 374 mcs_80_map_tx, mcs_80_map_rx); 375 return false; 376 } 377 378 if (!he_op) 379 return true; 380 381 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 382 383 /* 384 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 385 * zeroes, which is nonsense, and completely inconsistent with itself 386 * (it doesn't have 8 streams). Accept the settings in this case anyway. 387 */ 388 if (!ap_min_req_set) 389 return true; 390 391 /* make sure the AP is consistent with itself 392 * 393 * P802.11-REVme/D0.3 394 * 26.17.1 Basic HE BSS operation 395 * 396 * A STA that is operating in an HE BSS shall be able to receive and 397 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 398 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 399 * MLME-START.request primitive and shall be able to receive at each of 400 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 401 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 402 * primitive 403 */ 404 for (nss = 8; nss > 0; nss--) { 405 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 406 u8 ap_rx_val; 407 u8 ap_tx_val; 408 409 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 410 continue; 411 412 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 413 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 414 415 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 416 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 417 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 418 sdata_info(sdata, 419 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 420 nss, ap_rx_val, ap_rx_val, ap_op_val); 421 return false; 422 } 423 } 424 425 return true; 426 } 427 428 static bool 429 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 430 struct ieee80211_supported_band *sband, 431 const struct ieee80211_he_operation *he_op) 432 { 433 const struct ieee80211_sta_he_cap *sta_he_cap = 434 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 435 u16 ap_min_req_set; 436 int i; 437 438 if (!sta_he_cap || !he_op) 439 return false; 440 441 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 442 443 /* 444 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 445 * zeroes, which is nonsense, and completely inconsistent with itself 446 * (it doesn't have 8 streams). Accept the settings in this case anyway. 447 */ 448 if (!ap_min_req_set) 449 return true; 450 451 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 452 for (i = 0; i < 3; i++) { 453 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 454 &sta_he_cap->he_mcs_nss_supp; 455 u16 sta_mcs_map_rx = 456 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 457 u16 sta_mcs_map_tx = 458 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 459 u8 nss; 460 bool verified = true; 461 462 /* 463 * For each band there is a maximum of 8 spatial streams 464 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 465 * of 2 bits per NSS (1-8), with the values defined in enum 466 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 467 * capabilities aren't less than the AP's minimum requirements 468 * for this HE BSS per SS. 469 * It is enough to find one such band that meets the reqs. 470 */ 471 for (nss = 8; nss > 0; nss--) { 472 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 473 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 474 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 475 476 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 477 continue; 478 479 /* 480 * Make sure the HE AP doesn't require MCSs that aren't 481 * supported by the client as required by spec 482 * 483 * P802.11-REVme/D0.3 484 * 26.17.1 Basic HE BSS operation 485 * 486 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 487 * a BSS, unless it supports (i.e., is able to both transmit and 488 * receive using) all of the <HE-MCS, NSS> tuples in the basic 489 * HE-MCS and NSS set. 490 */ 491 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 492 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 493 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 494 verified = false; 495 break; 496 } 497 } 498 499 if (verified) 500 return true; 501 } 502 503 /* If here, STA doesn't meet AP's HE min requirements */ 504 return false; 505 } 506 507 static u8 508 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 509 const struct ieee80211_sta_eht_cap *sta_eht_cap, 510 unsigned int idx, int bw) 511 { 512 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 513 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 514 515 /* handle us being a 20 MHz-only EHT STA - with four values 516 * for MCS 0-7, 8-9, 10-11, 12-13. 517 */ 518 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 519 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 520 521 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 522 if (idx > 0) 523 idx--; 524 525 switch (bw) { 526 case 0: 527 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 528 case 1: 529 if (!(he_phy_cap0 & 530 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 531 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 532 return 0xff; /* pass check */ 533 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 534 case 2: 535 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 536 return 0xff; /* pass check */ 537 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 538 } 539 540 WARN_ON(1); 541 return 0; 542 } 543 544 static bool 545 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 546 struct ieee80211_supported_band *sband, 547 const struct ieee80211_eht_operation *eht_op) 548 { 549 const struct ieee80211_sta_he_cap *sta_he_cap = 550 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 551 const struct ieee80211_sta_eht_cap *sta_eht_cap = 552 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 553 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 554 unsigned int i; 555 556 if (!sta_he_cap || !sta_eht_cap || !eht_op) 557 return false; 558 559 req = &eht_op->basic_mcs_nss; 560 561 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 562 u8 req_rx_nss, req_tx_nss; 563 unsigned int bw; 564 565 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 566 IEEE80211_EHT_MCS_NSS_RX); 567 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 568 IEEE80211_EHT_MCS_NSS_TX); 569 570 for (bw = 0; bw < 3; bw++) { 571 u8 have, have_rx_nss, have_tx_nss; 572 573 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 574 sta_eht_cap, 575 i, bw); 576 have_rx_nss = u8_get_bits(have, 577 IEEE80211_EHT_MCS_NSS_RX); 578 have_tx_nss = u8_get_bits(have, 579 IEEE80211_EHT_MCS_NSS_TX); 580 581 if (req_rx_nss > have_rx_nss || 582 req_tx_nss > have_tx_nss) 583 return false; 584 } 585 } 586 587 return true; 588 } 589 590 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 591 const struct cfg80211_chan_def *chandef, 592 u32 prohibited_flags) 593 { 594 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 595 chandef, prohibited_flags)) 596 return false; 597 598 if (chandef->punctured && 599 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 600 return false; 601 602 if (chandef->punctured && chandef->chan->band == NL80211_BAND_5GHZ && 603 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING_5GHZ)) 604 return false; 605 606 return true; 607 } 608 609 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 610 { 611 if (c->width == NL80211_CHAN_WIDTH_80P80) 612 return 4 + 4; 613 614 return nl80211_chan_width_to_mhz(c->width) / 20; 615 } 616 617 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 618 { 619 switch (c->width) { 620 case NL80211_CHAN_WIDTH_20: 621 case NL80211_CHAN_WIDTH_20_NOHT: 622 return 1; 623 case NL80211_CHAN_WIDTH_40: 624 return 2; 625 case NL80211_CHAN_WIDTH_80P80: 626 case NL80211_CHAN_WIDTH_80: 627 return 3; 628 case NL80211_CHAN_WIDTH_160: 629 return 4; 630 case NL80211_CHAN_WIDTH_320: 631 return 5; 632 default: 633 WARN_ON(1); 634 return 0; 635 } 636 } 637 638 VISIBLE_IF_MAC80211_KUNIT int 639 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 640 u8 n_partial_subchans) 641 { 642 int n = ieee80211_chandef_num_subchans(ap); 643 struct cfg80211_chan_def tmp = *ap; 644 int offset = 0; 645 646 /* 647 * Given a chandef (in this context, it's the AP's) and a number 648 * of subchannels that we want to look at ('n_partial_subchans'), 649 * calculate the offset in number of subchannels between the full 650 * and the subset with the desired width. 651 */ 652 653 /* same number of subchannels means no offset, obviously */ 654 if (n == n_partial_subchans) 655 return 0; 656 657 /* don't WARN - misconfigured APs could cause this if their N > width */ 658 if (n < n_partial_subchans) 659 return 0; 660 661 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 662 u32 prev = tmp.center_freq1; 663 664 ieee80211_chandef_downgrade(&tmp, NULL); 665 666 /* 667 * if center_freq moved up, half the original channels 668 * are gone now but were below, so increase offset 669 */ 670 if (prev < tmp.center_freq1) 671 offset += ieee80211_chandef_num_subchans(&tmp); 672 } 673 674 /* 675 * 80+80 with secondary 80 below primary - four subchannels for it 676 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 677 */ 678 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 679 ap->center_freq2 < ap->center_freq1) 680 offset += 4; 681 682 return offset; 683 } 684 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 685 686 VISIBLE_IF_MAC80211_KUNIT void 687 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 688 const struct cfg80211_chan_def *ap, 689 const struct cfg80211_chan_def *used) 690 { 691 u8 needed = ieee80211_chandef_num_subchans(used); 692 u8 have = ieee80211_chandef_num_subchans(ap); 693 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 694 u8 offset; 695 696 if (!psd->valid) 697 return; 698 699 /* if N is zero, all defaults were used, no point in rearranging */ 700 if (!psd->n) 701 goto out; 702 703 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 704 705 /* 706 * This assumes that 'N' is consistent with the HE channel, as 707 * it should be (otherwise the AP is broken). 708 * 709 * In psd->power we have values in the order 0..N, 0..K, where 710 * N+K should cover the entire channel per 'ap', but even if it 711 * doesn't then we've pre-filled 'unlimited' as defaults. 712 * 713 * But this is all the wrong order, we want to have them in the 714 * order of the 'used' channel. 715 * 716 * So for example, we could have a 320 MHz EHT AP, which has the 717 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 718 * seem to be considered for the TPE), as follows: 719 * 720 * EHT 320: | | | | | | | | | | | | | | | | | 721 * HE 80: | | | | | 722 * used 160: | | | | | | | | | 723 * 724 * N entries: |--|--|--|--| 725 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 726 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 727 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 728 * used chan: 0 1 2 3 4 5 6 7 729 * 730 * The idx in the power array ('power idx') is like this since it 731 * comes directly from the element's N and K entries in their 732 * element order, and those are this way for HE compatibility. 733 * 734 * Rearrange them as desired here, first by putting them into the 735 * 'full chan' order, and then selecting the necessary subset for 736 * the 'used chan'. 737 */ 738 739 /* first reorder according to AP channel */ 740 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 741 for (int i = 0; i < have; i++) { 742 if (i < offset) 743 tmp[i] = psd->power[i + psd->n]; 744 else if (i < offset + psd->n) 745 tmp[i] = psd->power[i - offset]; 746 else 747 tmp[i] = psd->power[i]; 748 } 749 750 /* 751 * and then select the subset for the used channel 752 * (set everything to defaults first in case a driver is confused) 753 */ 754 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 755 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 756 for (int i = 0; i < needed; i++) 757 psd->power[i] = tmp[offset + i]; 758 759 out: 760 /* limit, but don't lie if there are defaults in the data */ 761 if (needed < psd->count) 762 psd->count = needed; 763 } 764 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 765 766 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 767 const struct cfg80211_chan_def *ap, 768 const struct cfg80211_chan_def *used) 769 { 770 /* ignore this completely for narrow/invalid channels */ 771 if (!ieee80211_chandef_num_subchans(ap) || 772 !ieee80211_chandef_num_subchans(used)) { 773 ieee80211_clear_tpe(tpe); 774 return; 775 } 776 777 for (int i = 0; i < 2; i++) { 778 int needed_pwr_count; 779 780 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 781 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 782 783 /* limit this to the widths we actually need */ 784 needed_pwr_count = ieee80211_chandef_num_widths(used); 785 if (needed_pwr_count < tpe->max_local[i].count) 786 tpe->max_local[i].count = needed_pwr_count; 787 if (needed_pwr_count < tpe->max_reg_client[i].count) 788 tpe->max_reg_client[i].count = needed_pwr_count; 789 } 790 } 791 792 /* 793 * The AP part of the channel request is used to distinguish settings 794 * to the device used for wider bandwidth OFDMA. This is used in the 795 * channel context code to assign two channel contexts even if they're 796 * both for the same channel, if the AP bandwidths are incompatible. 797 * If not EHT (or driver override) then ap.chan == NULL indicates that 798 * there's no wider BW OFDMA used. 799 */ 800 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 801 struct ieee80211_chan_req *chanreq, 802 struct ieee80211_conn_settings *conn, 803 struct cfg80211_chan_def *ap_chandef) 804 { 805 chanreq->ap.chan = NULL; 806 807 if (conn->mode < IEEE80211_CONN_MODE_EHT) 808 return; 809 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 810 return; 811 812 chanreq->ap = *ap_chandef; 813 } 814 815 static struct ieee802_11_elems * 816 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 817 struct ieee80211_conn_settings *conn, 818 struct cfg80211_bss *cbss, int link_id, 819 struct ieee80211_chan_req *chanreq, 820 struct cfg80211_chan_def *ap_chandef) 821 { 822 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 823 struct ieee80211_bss *bss = (void *)cbss->priv; 824 struct ieee80211_channel *channel = cbss->channel; 825 struct ieee80211_elems_parse_params parse_params = { 826 .link_id = -1, 827 .from_ap = true, 828 .start = ies->data, 829 .len = ies->len, 830 }; 831 struct ieee802_11_elems *elems; 832 struct ieee80211_supported_band *sband; 833 enum ieee80211_conn_mode ap_mode; 834 int ret; 835 836 again: 837 parse_params.mode = conn->mode; 838 elems = ieee802_11_parse_elems_full(&parse_params); 839 if (!elems) 840 return ERR_PTR(-ENOMEM); 841 842 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 843 elems, false, conn, ap_chandef); 844 845 /* this should be impossible since parsing depends on our mode */ 846 if (WARN_ON(ap_mode > conn->mode)) { 847 ret = -EINVAL; 848 goto free; 849 } 850 851 if (conn->mode != ap_mode) { 852 conn->mode = ap_mode; 853 kfree(elems); 854 goto again; 855 } 856 857 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 858 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 859 860 sband = sdata->local->hw.wiphy->bands[channel->band]; 861 862 switch (channel->band) { 863 case NL80211_BAND_S1GHZ: 864 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 865 ret = -EINVAL; 866 goto free; 867 } 868 return elems; 869 case NL80211_BAND_6GHZ: 870 if (ap_mode < IEEE80211_CONN_MODE_HE) { 871 sdata_info(sdata, 872 "Rejecting non-HE 6/7 GHz connection"); 873 ret = -EINVAL; 874 goto free; 875 } 876 break; 877 default: 878 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 879 ret = -EINVAL; 880 goto free; 881 } 882 } 883 884 switch (ap_mode) { 885 case IEEE80211_CONN_MODE_S1G: 886 WARN_ON(1); 887 ret = -EINVAL; 888 goto free; 889 case IEEE80211_CONN_MODE_LEGACY: 890 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 891 break; 892 case IEEE80211_CONN_MODE_HT: 893 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 894 conn->bw_limit, 895 IEEE80211_CONN_BW_LIMIT_40); 896 break; 897 case IEEE80211_CONN_MODE_VHT: 898 case IEEE80211_CONN_MODE_HE: 899 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 900 conn->bw_limit, 901 IEEE80211_CONN_BW_LIMIT_160); 902 break; 903 case IEEE80211_CONN_MODE_EHT: 904 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 905 conn->bw_limit, 906 IEEE80211_CONN_BW_LIMIT_320); 907 break; 908 } 909 910 chanreq->oper = *ap_chandef; 911 912 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 913 914 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 915 IEEE80211_CHAN_DISABLED)) { 916 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 917 ret = -EINVAL; 918 goto free; 919 } 920 921 ieee80211_chanreq_downgrade(chanreq, conn); 922 } 923 924 if (conn->mode >= IEEE80211_CONN_MODE_HE && 925 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 926 IEEE80211_CHAN_NO_HE)) { 927 conn->mode = IEEE80211_CONN_MODE_VHT; 928 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 929 conn->bw_limit, 930 IEEE80211_CONN_BW_LIMIT_160); 931 } 932 933 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 934 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 935 IEEE80211_CHAN_NO_EHT)) { 936 conn->mode = IEEE80211_CONN_MODE_HE; 937 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 938 conn->bw_limit, 939 IEEE80211_CONN_BW_LIMIT_160); 940 } 941 942 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 943 sdata_info(sdata, 944 "regulatory prevented using AP config, downgraded\n"); 945 946 if (conn->mode >= IEEE80211_CONN_MODE_HE && 947 (!ieee80211_verify_peer_he_mcs_support(sdata, (void *)elems->he_cap, 948 elems->he_operation) || 949 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 950 elems->he_operation))) { 951 conn->mode = IEEE80211_CONN_MODE_VHT; 952 sdata_info(sdata, "required MCSes not supported, disabling HE\n"); 953 } 954 955 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 956 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 957 elems->eht_operation)) { 958 conn->mode = IEEE80211_CONN_MODE_HE; 959 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 960 conn->bw_limit, 961 IEEE80211_CONN_BW_LIMIT_160); 962 sdata_info(sdata, "required MCSes not supported, disabling EHT\n"); 963 } 964 965 /* the mode can only decrease, so this must terminate */ 966 if (ap_mode != conn->mode) { 967 kfree(elems); 968 goto again; 969 } 970 971 mlme_link_id_dbg(sdata, link_id, 972 "connecting with %s mode, max bandwidth %d MHz\n", 973 ieee80211_conn_mode_str(conn->mode), 974 20 * (1 << conn->bw_limit)); 975 976 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 977 ret = -EINVAL; 978 goto free; 979 } 980 981 return elems; 982 free: 983 kfree(elems); 984 return ERR_PTR(ret); 985 } 986 987 static int ieee80211_config_bw(struct ieee80211_link_data *link, 988 struct ieee802_11_elems *elems, 989 bool update, u64 *changed) 990 { 991 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 992 struct ieee80211_sub_if_data *sdata = link->sdata; 993 struct ieee80211_chan_req chanreq = {}; 994 struct cfg80211_chan_def ap_chandef; 995 enum ieee80211_conn_mode ap_mode; 996 u32 vht_cap_info = 0; 997 u16 ht_opmode; 998 int ret; 999 1000 /* don't track any bandwidth changes in legacy/S1G modes */ 1001 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1002 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1003 return 0; 1004 1005 if (elems->vht_cap_elem) 1006 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1007 1008 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1009 elems, true, &link->u.mgd.conn, 1010 &ap_chandef); 1011 1012 if (ap_mode != link->u.mgd.conn.mode) { 1013 link_info(link, 1014 "AP appears to change mode (expected %s, found %s), disconnect\n", 1015 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1016 ieee80211_conn_mode_str(ap_mode)); 1017 return -EINVAL; 1018 } 1019 1020 chanreq.oper = ap_chandef; 1021 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1022 &ap_chandef); 1023 1024 /* 1025 * if HT operation mode changed store the new one - 1026 * this may be applicable even if channel is identical 1027 */ 1028 if (elems->ht_operation) { 1029 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1030 if (link->conf->ht_operation_mode != ht_opmode) { 1031 *changed |= BSS_CHANGED_HT; 1032 link->conf->ht_operation_mode = ht_opmode; 1033 } 1034 } 1035 1036 /* 1037 * Downgrade the new channel if we associated with restricted 1038 * bandwidth capabilities. For example, if we associated as a 1039 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1040 * or config reasons) then switching to a 40 MHz channel now 1041 * won't do us any good -- we couldn't use it with the AP. 1042 */ 1043 while (link->u.mgd.conn.bw_limit < 1044 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1045 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1046 1047 if (ap_chandef.chan->band == NL80211_BAND_6GHZ && 1048 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1049 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1050 &chanreq.oper); 1051 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1052 link->conf->tpe = elems->tpe; 1053 *changed |= BSS_CHANGED_TPE; 1054 } 1055 } 1056 1057 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1058 return 0; 1059 1060 link_info(link, 1061 "AP %pM changed bandwidth, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1062 link->u.mgd.bssid, chanreq.oper.chan->center_freq, 1063 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1064 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1065 chanreq.oper.center_freq2); 1066 1067 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1068 sdata_info(sdata, 1069 "AP %pM changed caps/bw in a way we can't support - disconnect\n", 1070 link->u.mgd.bssid); 1071 return -EINVAL; 1072 } 1073 1074 if (!update) { 1075 link->conf->chanreq = chanreq; 1076 return 0; 1077 } 1078 1079 /* 1080 * We're tracking the current AP here, so don't do any further checks 1081 * here. This keeps us from playing ping-pong with regulatory, without 1082 * it the following can happen (for example): 1083 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1084 * - AP advertises regdom US 1085 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1086 * - we detect an unsupported channel and disconnect 1087 * - disconnect causes CRDA to reload world regdomain and the game 1088 * starts anew. 1089 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1090 * 1091 * It seems possible that there are still scenarios with CSA or real 1092 * bandwidth changes where a this could happen, but those cases are 1093 * less common and wouldn't completely prevent using the AP. 1094 */ 1095 1096 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1097 if (ret) { 1098 sdata_info(sdata, 1099 "AP %pM changed bandwidth to incompatible one - disconnect\n", 1100 link->u.mgd.bssid); 1101 return ret; 1102 } 1103 1104 cfg80211_schedule_channels_check(&sdata->wdev); 1105 return 0; 1106 } 1107 1108 /* frame sending functions */ 1109 1110 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1111 struct sk_buff *skb, u8 ap_ht_param, 1112 struct ieee80211_supported_band *sband, 1113 struct ieee80211_channel *channel, 1114 enum ieee80211_smps_mode smps, 1115 const struct ieee80211_conn_settings *conn) 1116 { 1117 u8 *pos; 1118 u32 flags = channel->flags; 1119 u16 cap; 1120 struct ieee80211_sta_ht_cap ht_cap; 1121 1122 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1123 1124 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1125 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1126 1127 /* determine capability flags */ 1128 cap = ht_cap.cap; 1129 1130 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1131 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1132 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1133 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1134 cap &= ~IEEE80211_HT_CAP_SGI_40; 1135 } 1136 break; 1137 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1138 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1139 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1140 cap &= ~IEEE80211_HT_CAP_SGI_40; 1141 } 1142 break; 1143 } 1144 1145 /* 1146 * If 40 MHz was disabled associate as though we weren't 1147 * capable of 40 MHz -- some broken APs will never fall 1148 * back to trying to transmit in 20 MHz. 1149 */ 1150 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1151 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1152 cap &= ~IEEE80211_HT_CAP_SGI_40; 1153 } 1154 1155 /* set SM PS mode properly */ 1156 cap &= ~IEEE80211_HT_CAP_SM_PS; 1157 switch (smps) { 1158 case IEEE80211_SMPS_AUTOMATIC: 1159 case IEEE80211_SMPS_NUM_MODES: 1160 WARN_ON(1); 1161 fallthrough; 1162 case IEEE80211_SMPS_OFF: 1163 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1164 IEEE80211_HT_CAP_SM_PS_SHIFT; 1165 break; 1166 case IEEE80211_SMPS_STATIC: 1167 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1168 IEEE80211_HT_CAP_SM_PS_SHIFT; 1169 break; 1170 case IEEE80211_SMPS_DYNAMIC: 1171 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1172 IEEE80211_HT_CAP_SM_PS_SHIFT; 1173 break; 1174 } 1175 1176 /* reserve and fill IE */ 1177 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1178 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1179 } 1180 1181 /* This function determines vht capability flags for the association 1182 * and builds the IE. 1183 * Note - the function returns true to own the MU-MIMO capability 1184 */ 1185 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1186 struct sk_buff *skb, 1187 struct ieee80211_supported_band *sband, 1188 struct ieee80211_vht_cap *ap_vht_cap, 1189 const struct ieee80211_conn_settings *conn) 1190 { 1191 struct ieee80211_local *local = sdata->local; 1192 u8 *pos; 1193 u32 cap; 1194 struct ieee80211_sta_vht_cap vht_cap; 1195 u32 mask, ap_bf_sts, our_bf_sts; 1196 bool mu_mimo_owner = false; 1197 1198 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1199 1200 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1201 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1202 1203 /* determine capability flags */ 1204 cap = vht_cap.cap; 1205 1206 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1207 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1208 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1209 } 1210 1211 /* 1212 * Some APs apparently get confused if our capabilities are better 1213 * than theirs, so restrict what we advertise in the assoc request. 1214 */ 1215 if (!(ap_vht_cap->vht_cap_info & 1216 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1217 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1218 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1219 else if (!(ap_vht_cap->vht_cap_info & 1220 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1221 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1222 1223 /* 1224 * If some other vif is using the MU-MIMO capability we cannot associate 1225 * using MU-MIMO - this will lead to contradictions in the group-id 1226 * mechanism. 1227 * Ownership is defined since association request, in order to avoid 1228 * simultaneous associations with MU-MIMO. 1229 */ 1230 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1231 bool disable_mu_mimo = false; 1232 struct ieee80211_sub_if_data *other; 1233 1234 list_for_each_entry_rcu(other, &local->interfaces, list) { 1235 if (other->vif.bss_conf.mu_mimo_owner) { 1236 disable_mu_mimo = true; 1237 break; 1238 } 1239 } 1240 if (disable_mu_mimo) 1241 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1242 else 1243 mu_mimo_owner = true; 1244 } 1245 1246 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1247 1248 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1249 our_bf_sts = cap & mask; 1250 1251 if (ap_bf_sts < our_bf_sts) { 1252 cap &= ~mask; 1253 cap |= ap_bf_sts; 1254 } 1255 1256 /* reserve and fill IE */ 1257 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1258 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1259 1260 return mu_mimo_owner; 1261 } 1262 1263 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 1264 enum nl80211_chan_width width, 1265 struct ieee80211_supported_band *sband, 1266 struct ieee80211_mgd_assoc_data *assoc_data) 1267 { 1268 u32 rates; 1269 1270 if (assoc_data->supp_rates_len) { 1271 /* 1272 * Get all rates supported by the device and the AP as 1273 * some APs don't like getting a superset of their rates 1274 * in the association request (e.g. D-Link DAP 1353 in 1275 * b-only mode)... 1276 */ 1277 ieee80211_parse_bitrates(width, sband, 1278 assoc_data->supp_rates, 1279 assoc_data->supp_rates_len, 1280 &rates); 1281 } else { 1282 /* 1283 * In case AP not provide any supported rates information 1284 * before association, we send information element(s) with 1285 * all rates that we support. 1286 */ 1287 rates = ~0; 1288 } 1289 1290 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1291 WLAN_EID_SUPP_RATES); 1292 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1293 WLAN_EID_EXT_SUPP_RATES); 1294 } 1295 1296 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1297 const u8 *elems, 1298 size_t elems_len, 1299 size_t offset) 1300 { 1301 size_t noffset; 1302 1303 static const u8 before_ht[] = { 1304 WLAN_EID_SSID, 1305 WLAN_EID_SUPP_RATES, 1306 WLAN_EID_EXT_SUPP_RATES, 1307 WLAN_EID_PWR_CAPABILITY, 1308 WLAN_EID_SUPPORTED_CHANNELS, 1309 WLAN_EID_RSN, 1310 WLAN_EID_QOS_CAPA, 1311 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1312 WLAN_EID_MOBILITY_DOMAIN, 1313 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1314 WLAN_EID_RIC_DATA, /* reassoc only */ 1315 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1316 }; 1317 static const u8 after_ric[] = { 1318 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1319 WLAN_EID_HT_CAPABILITY, 1320 WLAN_EID_BSS_COEX_2040, 1321 /* luckily this is almost always there */ 1322 WLAN_EID_EXT_CAPABILITY, 1323 WLAN_EID_QOS_TRAFFIC_CAPA, 1324 WLAN_EID_TIM_BCAST_REQ, 1325 WLAN_EID_INTERWORKING, 1326 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1327 WLAN_EID_VHT_CAPABILITY, 1328 WLAN_EID_OPMODE_NOTIF, 1329 }; 1330 1331 if (!elems_len) 1332 return offset; 1333 1334 noffset = ieee80211_ie_split_ric(elems, elems_len, 1335 before_ht, 1336 ARRAY_SIZE(before_ht), 1337 after_ric, 1338 ARRAY_SIZE(after_ric), 1339 offset); 1340 skb_put_data(skb, elems + offset, noffset - offset); 1341 1342 return noffset; 1343 } 1344 1345 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1346 const u8 *elems, 1347 size_t elems_len, 1348 size_t offset) 1349 { 1350 static const u8 before_vht[] = { 1351 /* 1352 * no need to list the ones split off before HT 1353 * or generated here 1354 */ 1355 WLAN_EID_BSS_COEX_2040, 1356 WLAN_EID_EXT_CAPABILITY, 1357 WLAN_EID_QOS_TRAFFIC_CAPA, 1358 WLAN_EID_TIM_BCAST_REQ, 1359 WLAN_EID_INTERWORKING, 1360 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1361 }; 1362 size_t noffset; 1363 1364 if (!elems_len) 1365 return offset; 1366 1367 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1368 noffset = ieee80211_ie_split(elems, elems_len, 1369 before_vht, ARRAY_SIZE(before_vht), 1370 offset); 1371 skb_put_data(skb, elems + offset, noffset - offset); 1372 1373 return noffset; 1374 } 1375 1376 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1377 const u8 *elems, 1378 size_t elems_len, 1379 size_t offset) 1380 { 1381 static const u8 before_he[] = { 1382 /* 1383 * no need to list the ones split off before VHT 1384 * or generated here 1385 */ 1386 WLAN_EID_OPMODE_NOTIF, 1387 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1388 /* 11ai elements */ 1389 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1390 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1391 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1392 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1393 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1394 /* TODO: add 11ah/11aj/11ak elements */ 1395 }; 1396 size_t noffset; 1397 1398 if (!elems_len) 1399 return offset; 1400 1401 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1402 noffset = ieee80211_ie_split(elems, elems_len, 1403 before_he, ARRAY_SIZE(before_he), 1404 offset); 1405 skb_put_data(skb, elems + offset, noffset - offset); 1406 1407 return noffset; 1408 } 1409 1410 #define PRESENT_ELEMS_MAX 8 1411 #define PRESENT_ELEM_EXT_OFFS 0x100 1412 1413 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1414 struct sk_buff *skb, u16 capab, 1415 const struct element *ext_capa, 1416 const u16 *present_elems); 1417 1418 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1419 struct sk_buff *skb, u16 *capab, 1420 const struct element *ext_capa, 1421 const u8 *extra_elems, 1422 size_t extra_elems_len, 1423 unsigned int link_id, 1424 struct ieee80211_link_data *link, 1425 u16 *present_elems) 1426 { 1427 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1428 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1429 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1430 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1431 struct ieee80211_channel *chan = cbss->channel; 1432 const struct ieee80211_sband_iftype_data *iftd; 1433 struct ieee80211_local *local = sdata->local; 1434 struct ieee80211_supported_band *sband; 1435 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1436 struct ieee80211_chanctx_conf *chanctx_conf; 1437 enum ieee80211_smps_mode smps_mode; 1438 u16 orig_capab = *capab; 1439 size_t offset = 0; 1440 int present_elems_len = 0; 1441 u8 *pos; 1442 int i; 1443 1444 #define ADD_PRESENT_ELEM(id) do { \ 1445 /* need a last for termination - we use 0 == SSID */ \ 1446 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1447 present_elems[present_elems_len++] = (id); \ 1448 } while (0) 1449 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1450 1451 if (link) 1452 smps_mode = link->smps_mode; 1453 else if (sdata->u.mgd.powersave) 1454 smps_mode = IEEE80211_SMPS_DYNAMIC; 1455 else 1456 smps_mode = IEEE80211_SMPS_OFF; 1457 1458 if (link) { 1459 /* 1460 * 5/10 MHz scenarios are only viable without MLO, in which 1461 * case this pointer should be used ... All of this is a bit 1462 * unclear though, not sure this even works at all. 1463 */ 1464 rcu_read_lock(); 1465 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1466 if (chanctx_conf) 1467 width = chanctx_conf->def.width; 1468 rcu_read_unlock(); 1469 } 1470 1471 sband = local->hw.wiphy->bands[chan->band]; 1472 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1473 1474 if (sband->band == NL80211_BAND_2GHZ) { 1475 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1476 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1477 } 1478 1479 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1480 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1481 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1482 1483 if (sband->band != NL80211_BAND_S1GHZ) 1484 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1485 1486 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1487 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1488 struct cfg80211_chan_def chandef = { 1489 .width = width, 1490 .chan = chan, 1491 }; 1492 1493 pos = skb_put(skb, 4); 1494 *pos++ = WLAN_EID_PWR_CAPABILITY; 1495 *pos++ = 2; 1496 *pos++ = 0; /* min tx power */ 1497 /* max tx power */ 1498 *pos++ = ieee80211_chandef_max_power(&chandef); 1499 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1500 } 1501 1502 /* 1503 * Per spec, we shouldn't include the list of channels if we advertise 1504 * support for extended channel switching, but we've always done that; 1505 * (for now?) apply this restriction only on the (new) 6 GHz band. 1506 */ 1507 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1508 (sband->band != NL80211_BAND_6GHZ || 1509 !ext_capa || ext_capa->datalen < 1 || 1510 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1511 /* TODO: get this in reg domain format */ 1512 pos = skb_put(skb, 2 * sband->n_channels + 2); 1513 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1514 *pos++ = 2 * sband->n_channels; 1515 for (i = 0; i < sband->n_channels; i++) { 1516 int cf = sband->channels[i].center_freq; 1517 1518 *pos++ = ieee80211_frequency_to_channel(cf); 1519 *pos++ = 1; /* one channel in the subband*/ 1520 } 1521 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1522 } 1523 1524 /* if present, add any custom IEs that go before HT */ 1525 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1526 extra_elems_len, 1527 offset); 1528 1529 if (sband->band != NL80211_BAND_6GHZ && 1530 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1531 ieee80211_add_ht_ie(sdata, skb, 1532 assoc_data->link[link_id].ap_ht_param, 1533 sband, chan, smps_mode, 1534 &assoc_data->link[link_id].conn); 1535 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1536 } 1537 1538 /* if present, add any custom IEs that go before VHT */ 1539 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1540 extra_elems_len, 1541 offset); 1542 1543 if (sband->band != NL80211_BAND_6GHZ && 1544 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1545 sband->vht_cap.vht_supported) { 1546 bool mu_mimo_owner = 1547 ieee80211_add_vht_ie(sdata, skb, sband, 1548 &assoc_data->link[link_id].ap_vht_cap, 1549 &assoc_data->link[link_id].conn); 1550 1551 if (link) 1552 link->conf->mu_mimo_owner = mu_mimo_owner; 1553 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1554 } 1555 1556 /* if present, add any custom IEs that go before HE */ 1557 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1558 extra_elems_len, 1559 offset); 1560 1561 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1562 ieee80211_put_he_cap(skb, sdata, sband, 1563 &assoc_data->link[link_id].conn); 1564 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1565 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1566 } 1567 1568 /* 1569 * careful - need to know about all the present elems before 1570 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1571 * we're going to put it after the ML element 1572 */ 1573 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1574 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1575 1576 if (link_id == assoc_data->assoc_link_id) 1577 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1578 present_elems); 1579 1580 /* crash if somebody gets it wrong */ 1581 present_elems = NULL; 1582 1583 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1584 ieee80211_put_eht_cap(skb, sdata, sband, 1585 &assoc_data->link[link_id].conn); 1586 1587 if (sband->band == NL80211_BAND_S1GHZ) { 1588 ieee80211_add_aid_request_ie(sdata, skb); 1589 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1590 } 1591 1592 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1593 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1594 1595 return offset; 1596 } 1597 1598 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1599 const u16 *outer, 1600 const u16 *inner) 1601 { 1602 unsigned int skb_len = skb->len; 1603 bool at_extension = false; 1604 bool added = false; 1605 int i, j; 1606 u8 *len, *list_len = NULL; 1607 1608 skb_put_u8(skb, WLAN_EID_EXTENSION); 1609 len = skb_put(skb, 1); 1610 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1611 1612 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1613 u16 elem = outer[i]; 1614 bool have_inner = false; 1615 1616 /* should at least be sorted in the sense of normal -> ext */ 1617 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1618 1619 /* switch to extension list */ 1620 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1621 at_extension = true; 1622 if (!list_len) 1623 skb_put_u8(skb, 0); 1624 list_len = NULL; 1625 } 1626 1627 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1628 if (elem == inner[j]) { 1629 have_inner = true; 1630 break; 1631 } 1632 } 1633 1634 if (have_inner) 1635 continue; 1636 1637 if (!list_len) { 1638 list_len = skb_put(skb, 1); 1639 *list_len = 0; 1640 } 1641 *list_len += 1; 1642 skb_put_u8(skb, (u8)elem); 1643 added = true; 1644 } 1645 1646 /* if we added a list but no extension list, make a zero-len one */ 1647 if (added && (!at_extension || !list_len)) 1648 skb_put_u8(skb, 0); 1649 1650 /* if nothing added remove extension element completely */ 1651 if (!added) 1652 skb_trim(skb, skb_len); 1653 else 1654 *len = skb->len - skb_len - 2; 1655 } 1656 1657 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1658 struct sk_buff *skb, u16 capab, 1659 const struct element *ext_capa, 1660 const u16 *outer_present_elems) 1661 { 1662 struct ieee80211_local *local = sdata->local; 1663 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1664 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1665 struct ieee80211_multi_link_elem *ml_elem; 1666 struct ieee80211_mle_basic_common_info *common; 1667 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1668 __le16 eml_capa = 0, mld_capa_ops = 0; 1669 unsigned int link_id; 1670 u8 *ml_elem_len; 1671 void *capab_pos; 1672 1673 if (!ieee80211_vif_is_mld(&sdata->vif)) 1674 return; 1675 1676 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1677 ieee80211_vif_type_p2p(&sdata->vif)); 1678 if (ift_ext_capa) { 1679 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1680 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1681 } 1682 1683 skb_put_u8(skb, WLAN_EID_EXTENSION); 1684 ml_elem_len = skb_put(skb, 1); 1685 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1686 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1687 ml_elem->control = 1688 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1689 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1690 common = skb_put(skb, sizeof(*common)); 1691 common->len = sizeof(*common) + 1692 2; /* MLD capa/ops */ 1693 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1694 1695 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1696 if (eml_capa & 1697 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1698 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1699 common->len += 2; /* EML capabilities */ 1700 ml_elem->control |= 1701 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1702 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1703 } 1704 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1705 1706 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1707 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1708 const u8 *extra_elems; 1709 size_t extra_elems_len; 1710 size_t extra_used; 1711 u8 *subelem_len = NULL; 1712 __le16 ctrl; 1713 1714 if (!assoc_data->link[link_id].bss || 1715 link_id == assoc_data->assoc_link_id) 1716 continue; 1717 1718 extra_elems = assoc_data->link[link_id].elems; 1719 extra_elems_len = assoc_data->link[link_id].elems_len; 1720 1721 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1722 subelem_len = skb_put(skb, 1); 1723 1724 ctrl = cpu_to_le16(link_id | 1725 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1726 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1727 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1728 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1729 skb_put_data(skb, assoc_data->link[link_id].addr, 1730 ETH_ALEN); 1731 /* 1732 * Now add the contents of the (re)association request, 1733 * but the "listen interval" and "current AP address" 1734 * (if applicable) are skipped. So we only have 1735 * the capability field (remember the position and fill 1736 * later), followed by the elements added below by 1737 * calling ieee80211_assoc_link_elems(). 1738 */ 1739 capab_pos = skb_put(skb, 2); 1740 1741 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1742 ext_capa, 1743 extra_elems, 1744 extra_elems_len, 1745 link_id, NULL, 1746 link_present_elems); 1747 if (extra_elems) 1748 skb_put_data(skb, extra_elems + extra_used, 1749 extra_elems_len - extra_used); 1750 1751 put_unaligned_le16(capab, capab_pos); 1752 1753 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1754 link_present_elems); 1755 1756 ieee80211_fragment_element(skb, subelem_len, 1757 IEEE80211_MLE_SUBELEM_FRAGMENT); 1758 } 1759 1760 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1761 } 1762 1763 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1764 { 1765 struct ieee80211_local *local = sdata->local; 1766 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1767 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1768 struct ieee80211_link_data *link; 1769 struct sk_buff *skb; 1770 struct ieee80211_mgmt *mgmt; 1771 u8 *pos, qos_info, *ie_start; 1772 size_t offset, noffset; 1773 u16 capab = 0, link_capab; 1774 __le16 listen_int; 1775 struct element *ext_capa = NULL; 1776 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1777 struct ieee80211_prep_tx_info info = {}; 1778 unsigned int link_id, n_links = 0; 1779 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1780 void *capab_pos; 1781 size_t size; 1782 int ret; 1783 1784 /* we know it's writable, cast away the const */ 1785 if (assoc_data->ie_len) 1786 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1787 assoc_data->ie, 1788 assoc_data->ie_len); 1789 1790 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1791 1792 size = local->hw.extra_tx_headroom + 1793 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1794 2 + assoc_data->ssid_len + /* SSID */ 1795 assoc_data->ie_len + /* extra IEs */ 1796 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1797 9; /* WMM */ 1798 1799 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1800 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1801 const struct ieee80211_sband_iftype_data *iftd; 1802 struct ieee80211_supported_band *sband; 1803 1804 if (!cbss) 1805 continue; 1806 1807 sband = local->hw.wiphy->bands[cbss->channel->band]; 1808 1809 n_links++; 1810 /* add STA profile elements length */ 1811 size += assoc_data->link[link_id].elems_len; 1812 /* and supported rates length */ 1813 size += 4 + sband->n_bitrates; 1814 /* supported channels */ 1815 size += 2 + 2 * sband->n_channels; 1816 1817 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1818 if (iftd) 1819 size += iftd->vendor_elems.len; 1820 1821 /* power capability */ 1822 size += 4; 1823 1824 /* HT, VHT, HE, EHT */ 1825 size += 2 + sizeof(struct ieee80211_ht_cap); 1826 size += 2 + sizeof(struct ieee80211_vht_cap); 1827 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1828 sizeof(struct ieee80211_he_mcs_nss_supp) + 1829 IEEE80211_HE_PPE_THRES_MAX_LEN; 1830 1831 if (sband->band == NL80211_BAND_6GHZ) 1832 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1833 1834 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1835 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1836 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1837 1838 /* non-inheritance element */ 1839 size += 2 + 2 + PRESENT_ELEMS_MAX; 1840 1841 /* should be the same across all BSSes */ 1842 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1843 capab |= WLAN_CAPABILITY_PRIVACY; 1844 } 1845 1846 if (ieee80211_vif_is_mld(&sdata->vif)) { 1847 /* consider the multi-link element with STA profile */ 1848 size += sizeof(struct ieee80211_multi_link_elem); 1849 /* max common info field in basic multi-link element */ 1850 size += sizeof(struct ieee80211_mle_basic_common_info) + 1851 2 + /* capa & op */ 1852 2; /* EML capa */ 1853 1854 /* 1855 * The capability elements were already considered above; 1856 * note this over-estimates a bit because there's no 1857 * STA profile for the assoc link. 1858 */ 1859 size += (n_links - 1) * 1860 (1 + 1 + /* subelement ID/length */ 1861 2 + /* STA control */ 1862 1 + ETH_ALEN + 2 /* STA Info field */); 1863 } 1864 1865 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1866 if (WARN_ON(!link)) 1867 return -EINVAL; 1868 1869 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1870 return -EINVAL; 1871 1872 skb = alloc_skb(size, GFP_KERNEL); 1873 if (!skb) 1874 return -ENOMEM; 1875 1876 skb_reserve(skb, local->hw.extra_tx_headroom); 1877 1878 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1879 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1880 1881 /* Set MBSSID support for HE AP if needed */ 1882 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1883 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 1884 ext_capa && ext_capa->datalen >= 3) 1885 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1886 1887 mgmt = skb_put_zero(skb, 24); 1888 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1889 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1890 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1891 1892 listen_int = cpu_to_le16(assoc_data->s1g ? 1893 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1894 local->hw.conf.listen_interval); 1895 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1896 skb_put(skb, 10); 1897 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1898 IEEE80211_STYPE_REASSOC_REQ); 1899 capab_pos = &mgmt->u.reassoc_req.capab_info; 1900 mgmt->u.reassoc_req.listen_interval = listen_int; 1901 memcpy(mgmt->u.reassoc_req.current_ap, 1902 assoc_data->prev_ap_addr, ETH_ALEN); 1903 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1904 } else { 1905 skb_put(skb, 4); 1906 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1907 IEEE80211_STYPE_ASSOC_REQ); 1908 capab_pos = &mgmt->u.assoc_req.capab_info; 1909 mgmt->u.assoc_req.listen_interval = listen_int; 1910 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1911 } 1912 1913 /* SSID */ 1914 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1915 ie_start = pos; 1916 *pos++ = WLAN_EID_SSID; 1917 *pos++ = assoc_data->ssid_len; 1918 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1919 1920 /* 1921 * This bit is technically reserved, so it shouldn't matter for either 1922 * the AP or us, but it also means we shouldn't set it. However, we've 1923 * always set it in the past, and apparently some EHT APs check that 1924 * we don't set it. To avoid interoperability issues with old APs that 1925 * for some reason check it and want it to be set, set the bit for all 1926 * pre-EHT connections as we used to do. 1927 */ 1928 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT) 1929 capab |= WLAN_CAPABILITY_ESS; 1930 1931 /* add the elements for the assoc (main) link */ 1932 link_capab = capab; 1933 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1934 ext_capa, 1935 assoc_data->ie, 1936 assoc_data->ie_len, 1937 assoc_data->assoc_link_id, link, 1938 present_elems); 1939 put_unaligned_le16(link_capab, capab_pos); 1940 1941 /* if present, add any custom non-vendor IEs */ 1942 if (assoc_data->ie_len) { 1943 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1944 assoc_data->ie_len, 1945 offset); 1946 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1947 offset = noffset; 1948 } 1949 1950 if (assoc_data->wmm) { 1951 if (assoc_data->uapsd) { 1952 qos_info = ifmgd->uapsd_queues; 1953 qos_info |= (ifmgd->uapsd_max_sp_len << 1954 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1955 } else { 1956 qos_info = 0; 1957 } 1958 1959 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1960 } 1961 1962 /* add any remaining custom (i.e. vendor specific here) IEs */ 1963 if (assoc_data->ie_len) { 1964 noffset = assoc_data->ie_len; 1965 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1966 } 1967 1968 if (assoc_data->fils_kek_len) { 1969 ret = fils_encrypt_assoc_req(skb, assoc_data); 1970 if (ret < 0) { 1971 dev_kfree_skb(skb); 1972 return ret; 1973 } 1974 } 1975 1976 pos = skb_tail_pointer(skb); 1977 kfree(ifmgd->assoc_req_ies); 1978 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1979 if (!ifmgd->assoc_req_ies) { 1980 dev_kfree_skb(skb); 1981 return -ENOMEM; 1982 } 1983 1984 ifmgd->assoc_req_ies_len = pos - ie_start; 1985 1986 info.link_id = assoc_data->assoc_link_id; 1987 drv_mgd_prepare_tx(local, sdata, &info); 1988 1989 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1990 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1991 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1992 IEEE80211_TX_INTFL_MLME_CONN_TX; 1993 ieee80211_tx_skb(sdata, skb); 1994 1995 return 0; 1996 } 1997 1998 void ieee80211_send_pspoll(struct ieee80211_local *local, 1999 struct ieee80211_sub_if_data *sdata) 2000 { 2001 struct ieee80211_pspoll *pspoll; 2002 struct sk_buff *skb; 2003 2004 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2005 if (!skb) 2006 return; 2007 2008 pspoll = (struct ieee80211_pspoll *) skb->data; 2009 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2010 2011 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2012 ieee80211_tx_skb(sdata, skb); 2013 } 2014 2015 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2016 struct ieee80211_sub_if_data *sdata, 2017 bool powersave) 2018 { 2019 struct sk_buff *skb; 2020 struct ieee80211_hdr_3addr *nullfunc; 2021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2022 2023 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2024 !ieee80211_hw_check(&local->hw, 2025 DOESNT_SUPPORT_QOS_NDP)); 2026 if (!skb) 2027 return; 2028 2029 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2030 if (powersave) 2031 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2032 2033 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2034 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2035 2036 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2037 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2038 2039 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2040 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2041 2042 ieee80211_tx_skb(sdata, skb); 2043 } 2044 2045 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2046 struct ieee80211_sub_if_data *sdata) 2047 { 2048 struct sk_buff *skb; 2049 struct ieee80211_hdr *nullfunc; 2050 __le16 fc; 2051 2052 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2053 return; 2054 2055 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2056 if (!skb) 2057 return; 2058 2059 skb_reserve(skb, local->hw.extra_tx_headroom); 2060 2061 nullfunc = skb_put_zero(skb, 30); 2062 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2063 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2064 nullfunc->frame_control = fc; 2065 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2066 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2067 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2068 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2069 2070 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2071 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2072 ieee80211_tx_skb(sdata, skb); 2073 } 2074 2075 /* spectrum management related things */ 2076 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2077 struct wiphy_work *work) 2078 { 2079 struct ieee80211_link_data *link = 2080 container_of(work, struct ieee80211_link_data, 2081 u.mgd.csa.switch_work.work); 2082 struct ieee80211_sub_if_data *sdata = link->sdata; 2083 struct ieee80211_local *local = sdata->local; 2084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2085 int ret; 2086 2087 if (!ieee80211_sdata_running(sdata)) 2088 return; 2089 2090 lockdep_assert_wiphy(local->hw.wiphy); 2091 2092 if (!ifmgd->associated) 2093 return; 2094 2095 if (!link->conf->csa_active) 2096 return; 2097 2098 /* 2099 * If the link isn't active (now), we cannot wait for beacons, won't 2100 * have a reserved chanctx, etc. Just switch over the chandef and 2101 * update cfg80211 directly. 2102 */ 2103 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2104 link->conf->chanreq = link->csa.chanreq; 2105 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2106 link->link_id); 2107 return; 2108 } 2109 2110 /* 2111 * using reservation isn't immediate as it may be deferred until later 2112 * with multi-vif. once reservation is complete it will re-schedule the 2113 * work with no reserved_chanctx so verify chandef to check if it 2114 * completed successfully 2115 */ 2116 2117 if (link->reserved_chanctx) { 2118 /* 2119 * with multi-vif csa driver may call ieee80211_csa_finish() 2120 * many times while waiting for other interfaces to use their 2121 * reservations 2122 */ 2123 if (link->reserved_ready) 2124 return; 2125 2126 ret = ieee80211_link_use_reserved_context(link); 2127 if (ret) { 2128 link_info(link, 2129 "failed to use reserved channel context, disconnecting (err=%d)\n", 2130 ret); 2131 wiphy_work_queue(sdata->local->hw.wiphy, 2132 &ifmgd->csa_connection_drop_work); 2133 } 2134 return; 2135 } 2136 2137 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2138 &link->csa.chanreq)) { 2139 link_info(link, 2140 "failed to finalize channel switch, disconnecting\n"); 2141 wiphy_work_queue(sdata->local->hw.wiphy, 2142 &ifmgd->csa_connection_drop_work); 2143 return; 2144 } 2145 2146 link->u.mgd.csa.waiting_bcn = true; 2147 2148 /* apply new TPE restrictions immediately on the new channel */ 2149 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2150 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2151 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2152 &link->u.mgd.csa.ap_chandef, 2153 &link->conf->chanreq.oper); 2154 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2155 sizeof(link->u.mgd.csa.tpe))) { 2156 link->conf->tpe = link->u.mgd.csa.tpe; 2157 ieee80211_link_info_change_notify(sdata, link, 2158 BSS_CHANGED_TPE); 2159 } 2160 } 2161 2162 ieee80211_sta_reset_beacon_monitor(sdata); 2163 ieee80211_sta_reset_conn_monitor(sdata); 2164 } 2165 2166 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2167 { 2168 struct ieee80211_sub_if_data *sdata = link->sdata; 2169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2170 int ret; 2171 2172 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2173 2174 WARN_ON(!link->conf->csa_active); 2175 2176 ieee80211_vif_unblock_queues_csa(sdata); 2177 2178 link->conf->csa_active = false; 2179 link->u.mgd.csa.blocked_tx = false; 2180 link->u.mgd.csa.waiting_bcn = false; 2181 2182 ret = drv_post_channel_switch(link); 2183 if (ret) { 2184 link_info(link, 2185 "driver post channel switch failed, disconnecting\n"); 2186 wiphy_work_queue(sdata->local->hw.wiphy, 2187 &ifmgd->csa_connection_drop_work); 2188 return; 2189 } 2190 2191 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2192 link->link_id); 2193 } 2194 2195 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2196 unsigned int link_id) 2197 { 2198 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2199 2200 trace_api_chswitch_done(sdata, success, link_id); 2201 2202 rcu_read_lock(); 2203 2204 if (!success) { 2205 sdata_info(sdata, 2206 "driver channel switch failed (link %d), disconnecting\n", 2207 link_id); 2208 wiphy_work_queue(sdata->local->hw.wiphy, 2209 &sdata->u.mgd.csa_connection_drop_work); 2210 } else { 2211 struct ieee80211_link_data *link = 2212 rcu_dereference(sdata->link[link_id]); 2213 2214 if (WARN_ON(!link)) { 2215 rcu_read_unlock(); 2216 return; 2217 } 2218 2219 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2220 &link->u.mgd.csa.switch_work, 0); 2221 } 2222 2223 rcu_read_unlock(); 2224 } 2225 EXPORT_SYMBOL(ieee80211_chswitch_done); 2226 2227 static void 2228 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2229 { 2230 struct ieee80211_sub_if_data *sdata = link->sdata; 2231 struct ieee80211_local *local = sdata->local; 2232 2233 lockdep_assert_wiphy(local->hw.wiphy); 2234 2235 if (!local->ops->abort_channel_switch) 2236 return; 2237 2238 ieee80211_link_unreserve_chanctx(link); 2239 2240 ieee80211_vif_unblock_queues_csa(sdata); 2241 2242 link->conf->csa_active = false; 2243 link->u.mgd.csa.blocked_tx = false; 2244 2245 drv_abort_channel_switch(link); 2246 } 2247 2248 struct sta_csa_rnr_iter_data { 2249 struct ieee80211_link_data *link; 2250 struct ieee80211_channel *chan; 2251 u8 mld_id; 2252 }; 2253 2254 static enum cfg80211_rnr_iter_ret 2255 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2256 const struct ieee80211_neighbor_ap_info *info, 2257 const u8 *tbtt_info, u8 tbtt_info_len) 2258 { 2259 struct sta_csa_rnr_iter_data *data = _data; 2260 struct ieee80211_link_data *link = data->link; 2261 struct ieee80211_sub_if_data *sdata = link->sdata; 2262 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2263 const struct ieee80211_tbtt_info_ge_11 *ti; 2264 enum nl80211_band band; 2265 unsigned int center_freq; 2266 int link_id; 2267 2268 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2269 return RNR_ITER_CONTINUE; 2270 2271 if (tbtt_info_len < sizeof(*ti)) 2272 return RNR_ITER_CONTINUE; 2273 2274 ti = (const void *)tbtt_info; 2275 2276 if (ti->mld_params.mld_id != data->mld_id) 2277 return RNR_ITER_CONTINUE; 2278 2279 link_id = le16_get_bits(ti->mld_params.params, 2280 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2281 if (link_id != data->link->link_id) 2282 return RNR_ITER_CONTINUE; 2283 2284 /* we found the entry for our link! */ 2285 2286 /* this AP is confused, it had this right before ... just disconnect */ 2287 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2288 link_info(link, 2289 "AP now has invalid operating class in RNR, disconnect\n"); 2290 wiphy_work_queue(sdata->local->hw.wiphy, 2291 &ifmgd->csa_connection_drop_work); 2292 return RNR_ITER_BREAK; 2293 } 2294 2295 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2296 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2297 2298 return RNR_ITER_BREAK; 2299 } 2300 2301 static void 2302 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2303 struct ieee802_11_elems *elems) 2304 { 2305 struct ieee80211_sub_if_data *sdata = link->sdata; 2306 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2307 struct sta_csa_rnr_iter_data data = { 2308 .link = link, 2309 }; 2310 2311 /* 2312 * If we get here, we see a beacon from another link without 2313 * CSA still being reported for it, so now we have to check 2314 * if the CSA was aborted or completed. This may not even be 2315 * perfectly possible if the CSA was only done for changing 2316 * the puncturing, but in that case if the link in inactive 2317 * we don't really care, and if it's an active link (or when 2318 * it's activated later) we'll get a beacon and adjust. 2319 */ 2320 2321 if (WARN_ON(!elems->ml_basic)) 2322 return; 2323 2324 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2325 2326 /* 2327 * So in order to do this, iterate the RNR element(s) and see 2328 * what channel is reported now. 2329 */ 2330 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2331 ieee80211_sta_csa_rnr_iter, &data); 2332 2333 if (!data.chan) { 2334 link_info(link, 2335 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2336 wiphy_work_queue(sdata->local->hw.wiphy, 2337 &ifmgd->csa_connection_drop_work); 2338 return; 2339 } 2340 2341 /* 2342 * If it doesn't match the CSA, then assume it aborted. This 2343 * may erroneously detect that it was _not_ aborted when it 2344 * was in fact aborted, but only changed the bandwidth or the 2345 * puncturing configuration, but we don't have enough data to 2346 * detect that. 2347 */ 2348 if (data.chan != link->csa.chanreq.oper.chan) 2349 ieee80211_sta_abort_chanswitch(link); 2350 } 2351 2352 enum ieee80211_csa_source { 2353 IEEE80211_CSA_SOURCE_BEACON, 2354 IEEE80211_CSA_SOURCE_OTHER_LINK, 2355 IEEE80211_CSA_SOURCE_PROT_ACTION, 2356 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2357 }; 2358 2359 static void 2360 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2361 u64 timestamp, u32 device_timestamp, 2362 struct ieee802_11_elems *full_elems, 2363 struct ieee802_11_elems *csa_elems, 2364 enum ieee80211_csa_source source) 2365 { 2366 struct ieee80211_sub_if_data *sdata = link->sdata; 2367 struct ieee80211_local *local = sdata->local; 2368 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2369 struct ieee80211_chanctx *chanctx = NULL; 2370 struct ieee80211_chanctx_conf *conf; 2371 struct ieee80211_csa_ie csa_ie = {}; 2372 struct ieee80211_channel_switch ch_switch = { 2373 .link_id = link->link_id, 2374 .timestamp = timestamp, 2375 .device_timestamp = device_timestamp, 2376 }; 2377 unsigned long now; 2378 int res; 2379 2380 lockdep_assert_wiphy(local->hw.wiphy); 2381 2382 if (csa_elems) { 2383 struct cfg80211_bss *cbss = link->conf->bss; 2384 enum nl80211_band current_band; 2385 struct ieee80211_bss *bss; 2386 2387 if (WARN_ON(!cbss)) 2388 return; 2389 2390 current_band = cbss->channel->band; 2391 bss = (void *)cbss->priv; 2392 2393 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2394 current_band, 2395 bss->vht_cap_info, 2396 &link->u.mgd.conn, 2397 link->u.mgd.bssid, 2398 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2399 &csa_ie); 2400 if (res == 0) { 2401 ch_switch.block_tx = csa_ie.mode; 2402 ch_switch.chandef = csa_ie.chanreq.oper; 2403 ch_switch.count = csa_ie.count; 2404 ch_switch.delay = csa_ie.max_switch_time; 2405 } 2406 2407 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2408 } else { 2409 /* 2410 * If there was no per-STA profile for this link, we 2411 * get called with csa_elems == NULL. This of course means 2412 * there are no CSA elements, so set res=1 indicating 2413 * no more CSA. 2414 */ 2415 res = 1; 2416 } 2417 2418 if (res < 0) { 2419 /* ignore this case, not a protected frame */ 2420 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2421 return; 2422 goto drop_connection; 2423 } 2424 2425 if (link->conf->csa_active) { 2426 switch (source) { 2427 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2428 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2429 /* already processing - disregard action frames */ 2430 return; 2431 case IEEE80211_CSA_SOURCE_BEACON: 2432 if (link->u.mgd.csa.waiting_bcn) { 2433 ieee80211_chswitch_post_beacon(link); 2434 /* 2435 * If the CSA is still present after the switch 2436 * we need to consider it as a new CSA (possibly 2437 * to self). This happens by not returning here 2438 * so we'll get to the check below. 2439 */ 2440 } else if (res) { 2441 ieee80211_sta_abort_chanswitch(link); 2442 return; 2443 } else { 2444 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2445 return; 2446 } 2447 break; 2448 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2449 /* active link: we want to see the beacon to continue */ 2450 if (ieee80211_vif_link_active(&sdata->vif, 2451 link->link_id)) 2452 return; 2453 2454 /* switch work ran, so just complete the process */ 2455 if (link->u.mgd.csa.waiting_bcn) { 2456 ieee80211_chswitch_post_beacon(link); 2457 /* 2458 * If the CSA is still present after the switch 2459 * we need to consider it as a new CSA (possibly 2460 * to self). This happens by not returning here 2461 * so we'll get to the check below. 2462 */ 2463 break; 2464 } 2465 2466 /* link still has CSA but we already know, do nothing */ 2467 if (!res) 2468 return; 2469 2470 /* check in the RNR if the CSA aborted */ 2471 ieee80211_sta_other_link_csa_disappeared(link, 2472 full_elems); 2473 return; 2474 } 2475 } 2476 2477 /* no active CSA nor a new one */ 2478 if (res) { 2479 /* 2480 * However, we may have stopped queues when receiving a public 2481 * action frame that couldn't be protected, if it had the quiet 2482 * bit set. This is a trade-off, we want to be quiet as soon as 2483 * possible, but also don't trust the public action frame much, 2484 * as it can't be protected. 2485 */ 2486 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2487 link->u.mgd.csa.blocked_tx = false; 2488 ieee80211_vif_unblock_queues_csa(sdata); 2489 } 2490 return; 2491 } 2492 2493 /* 2494 * We don't really trust public action frames, but block queues (go to 2495 * quiet mode) for them anyway, we should get a beacon soon to either 2496 * know what the CSA really is, or figure out the public action frame 2497 * was actually an attack. 2498 */ 2499 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2500 if (csa_ie.mode) { 2501 link->u.mgd.csa.blocked_tx = true; 2502 ieee80211_vif_block_queues_csa(sdata); 2503 } 2504 return; 2505 } 2506 2507 if (link->conf->chanreq.oper.chan->band != 2508 csa_ie.chanreq.oper.chan->band) { 2509 link_info(link, 2510 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2511 link->u.mgd.bssid, 2512 csa_ie.chanreq.oper.chan->center_freq, 2513 csa_ie.chanreq.oper.width, 2514 csa_ie.chanreq.oper.center_freq1, 2515 csa_ie.chanreq.oper.center_freq2); 2516 goto drop_connection; 2517 } 2518 2519 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2520 IEEE80211_CHAN_DISABLED)) { 2521 link_info(link, 2522 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2523 link->u.mgd.bssid, 2524 csa_ie.chanreq.oper.chan->center_freq, 2525 csa_ie.chanreq.oper.chan->freq_offset, 2526 csa_ie.chanreq.oper.width, 2527 csa_ie.chanreq.oper.center_freq1, 2528 csa_ie.chanreq.oper.freq1_offset, 2529 csa_ie.chanreq.oper.center_freq2); 2530 goto drop_connection; 2531 } 2532 2533 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2534 &link->conf->chanreq.oper) && 2535 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2536 if (link->u.mgd.csa.ignored_same_chan) 2537 return; 2538 link_info(link, 2539 "AP %pM tries to chanswitch to same channel, ignore\n", 2540 link->u.mgd.bssid); 2541 link->u.mgd.csa.ignored_same_chan = true; 2542 return; 2543 } 2544 2545 /* 2546 * Drop all TDLS peers on the affected link - either we disconnect or 2547 * move to a different channel from this point on. There's no telling 2548 * what our peer will do. 2549 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2550 * have an incompatible wider chandef. 2551 */ 2552 ieee80211_teardown_tdls_peers(link); 2553 2554 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2555 lockdep_is_held(&local->hw.wiphy->mtx)); 2556 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2557 link_info(link, 2558 "no channel context assigned to vif?, disconnecting\n"); 2559 goto drop_connection; 2560 } 2561 2562 if (conf) 2563 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2564 2565 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2566 link_info(link, 2567 "driver doesn't support chan-switch with channel contexts\n"); 2568 goto drop_connection; 2569 } 2570 2571 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2572 link_info(link, 2573 "preparing for channel switch failed, disconnecting\n"); 2574 goto drop_connection; 2575 } 2576 2577 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2578 2579 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2580 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2581 &csa_ie.chanreq.ap); 2582 2583 if (chanctx) { 2584 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2585 chanctx->mode, false); 2586 if (res) { 2587 link_info(link, 2588 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2589 res); 2590 goto drop_connection; 2591 } 2592 } 2593 2594 link->conf->csa_active = true; 2595 link->u.mgd.csa.ignored_same_chan = false; 2596 link->u.mgd.beacon_crc_valid = false; 2597 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2598 2599 if (csa_ie.mode) 2600 ieee80211_vif_block_queues_csa(sdata); 2601 2602 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2603 link->link_id, csa_ie.count, 2604 csa_ie.mode); 2605 2606 /* we may have to handle timeout for deactivated link in software */ 2607 now = jiffies; 2608 link->u.mgd.csa.time = now + 2609 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2610 link->conf->beacon_int); 2611 2612 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 2613 local->ops->channel_switch) { 2614 /* 2615 * Use driver's channel switch callback, the driver will 2616 * later call ieee80211_chswitch_done(). It may deactivate 2617 * the link as well, we handle that elsewhere and queue 2618 * the csa.switch_work for the calculated time then. 2619 */ 2620 drv_channel_switch(local, sdata, &ch_switch); 2621 return; 2622 } 2623 2624 /* channel switch handled in software */ 2625 wiphy_delayed_work_queue(local->hw.wiphy, 2626 &link->u.mgd.csa.switch_work, 2627 link->u.mgd.csa.time - now); 2628 return; 2629 drop_connection: 2630 /* 2631 * This is just so that the disconnect flow will know that 2632 * we were trying to switch channel and failed. In case the 2633 * mode is 1 (we are not allowed to Tx), we will know not to 2634 * send a deauthentication frame. Those two fields will be 2635 * reset when the disconnection worker runs. 2636 */ 2637 link->conf->csa_active = true; 2638 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2639 sdata->csa_blocked_queues = 2640 csa_ie.mode && !ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA); 2641 2642 wiphy_work_queue(sdata->local->hw.wiphy, 2643 &ifmgd->csa_connection_drop_work); 2644 } 2645 2646 static bool 2647 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2648 struct ieee80211_channel *channel, 2649 const u8 *country_ie, u8 country_ie_len, 2650 const u8 *pwr_constr_elem, 2651 int *chan_pwr, int *pwr_reduction) 2652 { 2653 struct ieee80211_country_ie_triplet *triplet; 2654 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2655 int i, chan_increment; 2656 bool have_chan_pwr = false; 2657 2658 /* Invalid IE */ 2659 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2660 return false; 2661 2662 triplet = (void *)(country_ie + 3); 2663 country_ie_len -= 3; 2664 2665 switch (channel->band) { 2666 default: 2667 WARN_ON_ONCE(1); 2668 fallthrough; 2669 case NL80211_BAND_2GHZ: 2670 case NL80211_BAND_60GHZ: 2671 case NL80211_BAND_LC: 2672 chan_increment = 1; 2673 break; 2674 case NL80211_BAND_5GHZ: 2675 chan_increment = 4; 2676 break; 2677 case NL80211_BAND_6GHZ: 2678 /* 2679 * In the 6 GHz band, the "maximum transmit power level" 2680 * field in the triplets is reserved, and thus will be 2681 * zero and we shouldn't use it to control TX power. 2682 * The actual TX power will be given in the transmit 2683 * power envelope element instead. 2684 */ 2685 return false; 2686 } 2687 2688 /* find channel */ 2689 while (country_ie_len >= 3) { 2690 u8 first_channel = triplet->chans.first_channel; 2691 2692 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2693 goto next; 2694 2695 for (i = 0; i < triplet->chans.num_channels; i++) { 2696 if (first_channel + i * chan_increment == chan) { 2697 have_chan_pwr = true; 2698 *chan_pwr = triplet->chans.max_power; 2699 break; 2700 } 2701 } 2702 if (have_chan_pwr) 2703 break; 2704 2705 next: 2706 triplet++; 2707 country_ie_len -= 3; 2708 } 2709 2710 if (have_chan_pwr && pwr_constr_elem) 2711 *pwr_reduction = *pwr_constr_elem; 2712 else 2713 *pwr_reduction = 0; 2714 2715 return have_chan_pwr; 2716 } 2717 2718 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2719 struct ieee80211_channel *channel, 2720 const u8 *cisco_dtpc_ie, 2721 int *pwr_level) 2722 { 2723 /* From practical testing, the first data byte of the DTPC element 2724 * seems to contain the requested dBm level, and the CLI on Cisco 2725 * APs clearly state the range is -127 to 127 dBm, which indicates 2726 * a signed byte, although it seemingly never actually goes negative. 2727 * The other byte seems to always be zero. 2728 */ 2729 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2730 } 2731 2732 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2733 struct ieee80211_channel *channel, 2734 struct ieee80211_mgmt *mgmt, 2735 const u8 *country_ie, u8 country_ie_len, 2736 const u8 *pwr_constr_ie, 2737 const u8 *cisco_dtpc_ie) 2738 { 2739 struct ieee80211_sub_if_data *sdata = link->sdata; 2740 bool has_80211h_pwr = false, has_cisco_pwr = false; 2741 int chan_pwr = 0, pwr_reduction_80211h = 0; 2742 int pwr_level_cisco, pwr_level_80211h; 2743 int new_ap_level; 2744 __le16 capab = mgmt->u.probe_resp.capab_info; 2745 2746 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2747 return 0; /* TODO */ 2748 2749 if (country_ie && 2750 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2751 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2752 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2753 sdata, channel, country_ie, country_ie_len, 2754 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2755 pwr_level_80211h = 2756 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2757 } 2758 2759 if (cisco_dtpc_ie) { 2760 ieee80211_find_cisco_dtpc( 2761 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2762 has_cisco_pwr = true; 2763 } 2764 2765 if (!has_80211h_pwr && !has_cisco_pwr) 2766 return 0; 2767 2768 /* If we have both 802.11h and Cisco DTPC, apply both limits 2769 * by picking the smallest of the two power levels advertised. 2770 */ 2771 if (has_80211h_pwr && 2772 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2773 new_ap_level = pwr_level_80211h; 2774 2775 if (link->ap_power_level == new_ap_level) 2776 return 0; 2777 2778 sdata_dbg(sdata, 2779 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2780 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2781 link->u.mgd.bssid); 2782 } else { /* has_cisco_pwr is always true here. */ 2783 new_ap_level = pwr_level_cisco; 2784 2785 if (link->ap_power_level == new_ap_level) 2786 return 0; 2787 2788 sdata_dbg(sdata, 2789 "Limiting TX power to %d dBm as advertised by %pM\n", 2790 pwr_level_cisco, link->u.mgd.bssid); 2791 } 2792 2793 link->ap_power_level = new_ap_level; 2794 if (__ieee80211_recalc_txpower(sdata)) 2795 return BSS_CHANGED_TXPOWER; 2796 return 0; 2797 } 2798 2799 /* powersave */ 2800 static void ieee80211_enable_ps(struct ieee80211_local *local, 2801 struct ieee80211_sub_if_data *sdata) 2802 { 2803 struct ieee80211_conf *conf = &local->hw.conf; 2804 2805 /* 2806 * If we are scanning right now then the parameters will 2807 * take effect when scan finishes. 2808 */ 2809 if (local->scanning) 2810 return; 2811 2812 if (conf->dynamic_ps_timeout > 0 && 2813 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2814 mod_timer(&local->dynamic_ps_timer, jiffies + 2815 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2816 } else { 2817 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2818 ieee80211_send_nullfunc(local, sdata, true); 2819 2820 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2821 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2822 return; 2823 2824 conf->flags |= IEEE80211_CONF_PS; 2825 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2826 } 2827 } 2828 2829 static void ieee80211_change_ps(struct ieee80211_local *local) 2830 { 2831 struct ieee80211_conf *conf = &local->hw.conf; 2832 2833 if (local->ps_sdata) { 2834 ieee80211_enable_ps(local, local->ps_sdata); 2835 } else if (conf->flags & IEEE80211_CONF_PS) { 2836 conf->flags &= ~IEEE80211_CONF_PS; 2837 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2838 del_timer_sync(&local->dynamic_ps_timer); 2839 wiphy_work_cancel(local->hw.wiphy, 2840 &local->dynamic_ps_enable_work); 2841 } 2842 } 2843 2844 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2845 { 2846 struct ieee80211_local *local = sdata->local; 2847 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2848 struct sta_info *sta = NULL; 2849 bool authorized = false; 2850 2851 if (!mgd->powersave) 2852 return false; 2853 2854 if (mgd->broken_ap) 2855 return false; 2856 2857 if (!mgd->associated) 2858 return false; 2859 2860 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2861 return false; 2862 2863 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2864 !sdata->deflink.u.mgd.have_beacon) 2865 return false; 2866 2867 rcu_read_lock(); 2868 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2869 if (sta) 2870 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2871 rcu_read_unlock(); 2872 2873 return authorized; 2874 } 2875 2876 /* need to hold RTNL or interface lock */ 2877 void ieee80211_recalc_ps(struct ieee80211_local *local) 2878 { 2879 struct ieee80211_sub_if_data *sdata, *found = NULL; 2880 int count = 0; 2881 int timeout; 2882 2883 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2884 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2885 local->ps_sdata = NULL; 2886 return; 2887 } 2888 2889 list_for_each_entry(sdata, &local->interfaces, list) { 2890 if (!ieee80211_sdata_running(sdata)) 2891 continue; 2892 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2893 /* If an AP vif is found, then disable PS 2894 * by setting the count to zero thereby setting 2895 * ps_sdata to NULL. 2896 */ 2897 count = 0; 2898 break; 2899 } 2900 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2901 continue; 2902 found = sdata; 2903 count++; 2904 } 2905 2906 if (count == 1 && ieee80211_powersave_allowed(found)) { 2907 u8 dtimper = found->deflink.u.mgd.dtim_period; 2908 2909 timeout = local->dynamic_ps_forced_timeout; 2910 if (timeout < 0) 2911 timeout = 100; 2912 local->hw.conf.dynamic_ps_timeout = timeout; 2913 2914 /* If the TIM IE is invalid, pretend the value is 1 */ 2915 if (!dtimper) 2916 dtimper = 1; 2917 2918 local->hw.conf.ps_dtim_period = dtimper; 2919 local->ps_sdata = found; 2920 } else { 2921 local->ps_sdata = NULL; 2922 } 2923 2924 ieee80211_change_ps(local); 2925 } 2926 2927 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2928 { 2929 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2930 2931 if (sdata->vif.cfg.ps != ps_allowed) { 2932 sdata->vif.cfg.ps = ps_allowed; 2933 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2934 } 2935 } 2936 2937 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 2938 struct wiphy_work *work) 2939 { 2940 struct ieee80211_local *local = 2941 container_of(work, struct ieee80211_local, 2942 dynamic_ps_disable_work); 2943 2944 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2945 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2946 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2947 } 2948 2949 ieee80211_wake_queues_by_reason(&local->hw, 2950 IEEE80211_MAX_QUEUE_MAP, 2951 IEEE80211_QUEUE_STOP_REASON_PS, 2952 false); 2953 } 2954 2955 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 2956 struct wiphy_work *work) 2957 { 2958 struct ieee80211_local *local = 2959 container_of(work, struct ieee80211_local, 2960 dynamic_ps_enable_work); 2961 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2962 struct ieee80211_if_managed *ifmgd; 2963 unsigned long flags; 2964 int q; 2965 2966 /* can only happen when PS was just disabled anyway */ 2967 if (!sdata) 2968 return; 2969 2970 ifmgd = &sdata->u.mgd; 2971 2972 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2973 return; 2974 2975 if (local->hw.conf.dynamic_ps_timeout > 0) { 2976 /* don't enter PS if TX frames are pending */ 2977 if (drv_tx_frames_pending(local)) { 2978 mod_timer(&local->dynamic_ps_timer, jiffies + 2979 msecs_to_jiffies( 2980 local->hw.conf.dynamic_ps_timeout)); 2981 return; 2982 } 2983 2984 /* 2985 * transmission can be stopped by others which leads to 2986 * dynamic_ps_timer expiry. Postpone the ps timer if it 2987 * is not the actual idle state. 2988 */ 2989 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2990 for (q = 0; q < local->hw.queues; q++) { 2991 if (local->queue_stop_reasons[q]) { 2992 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2993 flags); 2994 mod_timer(&local->dynamic_ps_timer, jiffies + 2995 msecs_to_jiffies( 2996 local->hw.conf.dynamic_ps_timeout)); 2997 return; 2998 } 2999 } 3000 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3001 } 3002 3003 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3004 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3005 if (drv_tx_frames_pending(local)) { 3006 mod_timer(&local->dynamic_ps_timer, jiffies + 3007 msecs_to_jiffies( 3008 local->hw.conf.dynamic_ps_timeout)); 3009 } else { 3010 ieee80211_send_nullfunc(local, sdata, true); 3011 /* Flush to get the tx status of nullfunc frame */ 3012 ieee80211_flush_queues(local, sdata, false); 3013 } 3014 } 3015 3016 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3017 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3018 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3019 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3020 local->hw.conf.flags |= IEEE80211_CONF_PS; 3021 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3022 } 3023 } 3024 3025 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3026 { 3027 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 3028 3029 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3030 } 3031 3032 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3033 { 3034 struct ieee80211_sub_if_data *sdata = 3035 container_of(work, struct ieee80211_sub_if_data, 3036 dfs_cac_timer_work.work); 3037 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chanreq.oper; 3038 3039 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3040 3041 if (sdata->wdev.cac_started) { 3042 ieee80211_link_release_channel(&sdata->deflink); 3043 cfg80211_cac_event(sdata->dev, &chandef, 3044 NL80211_RADAR_CAC_FINISHED, 3045 GFP_KERNEL); 3046 } 3047 } 3048 3049 static bool 3050 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3051 { 3052 struct ieee80211_local *local = sdata->local; 3053 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3054 bool ret = false; 3055 int ac; 3056 3057 if (local->hw.queues < IEEE80211_NUM_ACS) 3058 return false; 3059 3060 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3061 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3062 int non_acm_ac; 3063 unsigned long now = jiffies; 3064 3065 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3066 tx_tspec->admitted_time && 3067 time_after(now, tx_tspec->time_slice_start + HZ)) { 3068 tx_tspec->consumed_tx_time = 0; 3069 tx_tspec->time_slice_start = now; 3070 3071 if (tx_tspec->downgraded) 3072 tx_tspec->action = 3073 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3074 } 3075 3076 switch (tx_tspec->action) { 3077 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3078 /* take the original parameters */ 3079 if (drv_conf_tx(local, &sdata->deflink, ac, 3080 &sdata->deflink.tx_conf[ac])) 3081 link_err(&sdata->deflink, 3082 "failed to set TX queue parameters for queue %d\n", 3083 ac); 3084 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3085 tx_tspec->downgraded = false; 3086 ret = true; 3087 break; 3088 case TX_TSPEC_ACTION_DOWNGRADE: 3089 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3090 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3091 ret = true; 3092 break; 3093 } 3094 /* downgrade next lower non-ACM AC */ 3095 for (non_acm_ac = ac + 1; 3096 non_acm_ac < IEEE80211_NUM_ACS; 3097 non_acm_ac++) 3098 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3099 break; 3100 /* Usually the loop will result in using BK even if it 3101 * requires admission control, but such a configuration 3102 * makes no sense and we have to transmit somehow - the 3103 * AC selection does the same thing. 3104 * If we started out trying to downgrade from BK, then 3105 * the extra condition here might be needed. 3106 */ 3107 if (non_acm_ac >= IEEE80211_NUM_ACS) 3108 non_acm_ac = IEEE80211_AC_BK; 3109 if (drv_conf_tx(local, &sdata->deflink, ac, 3110 &sdata->deflink.tx_conf[non_acm_ac])) 3111 link_err(&sdata->deflink, 3112 "failed to set TX queue parameters for queue %d\n", 3113 ac); 3114 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3115 ret = true; 3116 wiphy_delayed_work_queue(local->hw.wiphy, 3117 &ifmgd->tx_tspec_wk, 3118 tx_tspec->time_slice_start + 3119 HZ - now + 1); 3120 break; 3121 case TX_TSPEC_ACTION_NONE: 3122 /* nothing now */ 3123 break; 3124 } 3125 } 3126 3127 return ret; 3128 } 3129 3130 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3131 { 3132 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3133 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3134 BSS_CHANGED_QOS); 3135 } 3136 3137 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3138 struct wiphy_work *work) 3139 { 3140 struct ieee80211_sub_if_data *sdata; 3141 3142 sdata = container_of(work, struct ieee80211_sub_if_data, 3143 u.mgd.tx_tspec_wk.work); 3144 ieee80211_sta_handle_tspec_ac_params(sdata); 3145 } 3146 3147 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3148 { 3149 struct ieee80211_sub_if_data *sdata = link->sdata; 3150 struct ieee80211_local *local = sdata->local; 3151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3152 struct ieee80211_tx_queue_params *params = link->tx_conf; 3153 u8 ac; 3154 3155 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3156 mlme_dbg(sdata, 3157 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3158 ac, params[ac].acm, 3159 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3160 params[ac].txop, params[ac].uapsd, 3161 ifmgd->tx_tspec[ac].downgraded); 3162 if (!ifmgd->tx_tspec[ac].downgraded && 3163 drv_conf_tx(local, link, ac, ¶ms[ac])) 3164 link_err(link, 3165 "failed to set TX queue parameters for AC %d\n", 3166 ac); 3167 } 3168 } 3169 3170 /* MLME */ 3171 static bool 3172 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3173 struct ieee80211_link_data *link, 3174 const u8 *wmm_param, size_t wmm_param_len, 3175 const struct ieee80211_mu_edca_param_set *mu_edca) 3176 { 3177 struct ieee80211_sub_if_data *sdata = link->sdata; 3178 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3179 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3180 size_t left; 3181 int count, mu_edca_count, ac; 3182 const u8 *pos; 3183 u8 uapsd_queues = 0; 3184 3185 if (!local->ops->conf_tx) 3186 return false; 3187 3188 if (local->hw.queues < IEEE80211_NUM_ACS) 3189 return false; 3190 3191 if (!wmm_param) 3192 return false; 3193 3194 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3195 return false; 3196 3197 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3198 uapsd_queues = ifmgd->uapsd_queues; 3199 3200 count = wmm_param[6] & 0x0f; 3201 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3202 * if mu_edca was preset before and now it disappeared tell 3203 * the driver about it. 3204 */ 3205 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3206 if (count == link->u.mgd.wmm_last_param_set && 3207 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3208 return false; 3209 link->u.mgd.wmm_last_param_set = count; 3210 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3211 3212 pos = wmm_param + 8; 3213 left = wmm_param_len - 8; 3214 3215 memset(¶ms, 0, sizeof(params)); 3216 3217 sdata->wmm_acm = 0; 3218 for (; left >= 4; left -= 4, pos += 4) { 3219 int aci = (pos[0] >> 5) & 0x03; 3220 int acm = (pos[0] >> 4) & 0x01; 3221 bool uapsd = false; 3222 3223 switch (aci) { 3224 case 1: /* AC_BK */ 3225 ac = IEEE80211_AC_BK; 3226 if (acm) 3227 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3228 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3229 uapsd = true; 3230 params[ac].mu_edca = !!mu_edca; 3231 if (mu_edca) 3232 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3233 break; 3234 case 2: /* AC_VI */ 3235 ac = IEEE80211_AC_VI; 3236 if (acm) 3237 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3238 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3239 uapsd = true; 3240 params[ac].mu_edca = !!mu_edca; 3241 if (mu_edca) 3242 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3243 break; 3244 case 3: /* AC_VO */ 3245 ac = IEEE80211_AC_VO; 3246 if (acm) 3247 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3248 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3249 uapsd = true; 3250 params[ac].mu_edca = !!mu_edca; 3251 if (mu_edca) 3252 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3253 break; 3254 case 0: /* AC_BE */ 3255 default: 3256 ac = IEEE80211_AC_BE; 3257 if (acm) 3258 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3259 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3260 uapsd = true; 3261 params[ac].mu_edca = !!mu_edca; 3262 if (mu_edca) 3263 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3264 break; 3265 } 3266 3267 params[ac].aifs = pos[0] & 0x0f; 3268 3269 if (params[ac].aifs < 2) { 3270 link_info(link, 3271 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3272 params[ac].aifs, aci); 3273 params[ac].aifs = 2; 3274 } 3275 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3276 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3277 params[ac].txop = get_unaligned_le16(pos + 2); 3278 params[ac].acm = acm; 3279 params[ac].uapsd = uapsd; 3280 3281 if (params[ac].cw_min == 0 || 3282 params[ac].cw_min > params[ac].cw_max) { 3283 link_info(link, 3284 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3285 params[ac].cw_min, params[ac].cw_max, aci); 3286 return false; 3287 } 3288 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3289 } 3290 3291 /* WMM specification requires all 4 ACIs. */ 3292 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3293 if (params[ac].cw_min == 0) { 3294 link_info(link, 3295 "AP has invalid WMM params (missing AC %d), using defaults\n", 3296 ac); 3297 return false; 3298 } 3299 } 3300 3301 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3302 link->tx_conf[ac] = params[ac]; 3303 3304 ieee80211_mgd_set_link_qos_params(link); 3305 3306 /* enable WMM or activate new settings */ 3307 link->conf->qos = true; 3308 return true; 3309 } 3310 3311 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3312 { 3313 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3314 3315 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3316 ieee80211_run_deferred_scan(sdata->local); 3317 } 3318 3319 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3320 { 3321 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3322 3323 __ieee80211_stop_poll(sdata); 3324 } 3325 3326 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3327 u16 capab, bool erp_valid, u8 erp) 3328 { 3329 struct ieee80211_bss_conf *bss_conf = link->conf; 3330 struct ieee80211_supported_band *sband; 3331 u64 changed = 0; 3332 bool use_protection; 3333 bool use_short_preamble; 3334 bool use_short_slot; 3335 3336 sband = ieee80211_get_link_sband(link); 3337 if (!sband) 3338 return changed; 3339 3340 if (erp_valid) { 3341 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3342 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3343 } else { 3344 use_protection = false; 3345 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3346 } 3347 3348 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3349 if (sband->band == NL80211_BAND_5GHZ || 3350 sband->band == NL80211_BAND_6GHZ) 3351 use_short_slot = true; 3352 3353 if (use_protection != bss_conf->use_cts_prot) { 3354 bss_conf->use_cts_prot = use_protection; 3355 changed |= BSS_CHANGED_ERP_CTS_PROT; 3356 } 3357 3358 if (use_short_preamble != bss_conf->use_short_preamble) { 3359 bss_conf->use_short_preamble = use_short_preamble; 3360 changed |= BSS_CHANGED_ERP_PREAMBLE; 3361 } 3362 3363 if (use_short_slot != bss_conf->use_short_slot) { 3364 bss_conf->use_short_slot = use_short_slot; 3365 changed |= BSS_CHANGED_ERP_SLOT; 3366 } 3367 3368 return changed; 3369 } 3370 3371 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3372 struct cfg80211_bss *cbss) 3373 { 3374 struct ieee80211_sub_if_data *sdata = link->sdata; 3375 struct ieee80211_bss_conf *bss_conf = link->conf; 3376 struct ieee80211_bss *bss = (void *)cbss->priv; 3377 u64 changed = BSS_CHANGED_QOS; 3378 3379 /* not really used in MLO */ 3380 sdata->u.mgd.beacon_timeout = 3381 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3382 bss_conf->beacon_int)); 3383 3384 changed |= ieee80211_handle_bss_capability(link, 3385 bss_conf->assoc_capability, 3386 bss->has_erp_value, 3387 bss->erp_value); 3388 3389 ieee80211_check_rate_mask(link); 3390 3391 link->conf->bss = cbss; 3392 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3393 3394 if (sdata->vif.p2p || 3395 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3396 const struct cfg80211_bss_ies *ies; 3397 3398 rcu_read_lock(); 3399 ies = rcu_dereference(cbss->ies); 3400 if (ies) { 3401 int ret; 3402 3403 ret = cfg80211_get_p2p_attr( 3404 ies->data, ies->len, 3405 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3406 (u8 *) &bss_conf->p2p_noa_attr, 3407 sizeof(bss_conf->p2p_noa_attr)); 3408 if (ret >= 2) { 3409 link->u.mgd.p2p_noa_index = 3410 bss_conf->p2p_noa_attr.index; 3411 changed |= BSS_CHANGED_P2P_PS; 3412 } 3413 } 3414 rcu_read_unlock(); 3415 } 3416 3417 if (link->u.mgd.have_beacon) { 3418 bss_conf->beacon_rate = bss->beacon_rate; 3419 changed |= BSS_CHANGED_BEACON_INFO; 3420 } else { 3421 bss_conf->beacon_rate = NULL; 3422 } 3423 3424 /* Tell the driver to monitor connection quality (if supported) */ 3425 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3426 bss_conf->cqm_rssi_thold) 3427 changed |= BSS_CHANGED_CQM; 3428 3429 return changed; 3430 } 3431 3432 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3433 struct ieee80211_mgd_assoc_data *assoc_data, 3434 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3435 { 3436 struct ieee80211_local *local = sdata->local; 3437 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3438 u64 vif_changed = BSS_CHANGED_ASSOC; 3439 unsigned int link_id; 3440 3441 lockdep_assert_wiphy(local->hw.wiphy); 3442 3443 sdata->u.mgd.associated = true; 3444 3445 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3446 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3447 struct ieee80211_link_data *link; 3448 3449 if (!cbss || 3450 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3451 continue; 3452 3453 if (ieee80211_vif_is_mld(&sdata->vif) && 3454 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3455 continue; 3456 3457 link = sdata_dereference(sdata->link[link_id], sdata); 3458 if (WARN_ON(!link)) 3459 return; 3460 3461 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3462 } 3463 3464 /* just to be sure */ 3465 ieee80211_stop_poll(sdata); 3466 3467 ieee80211_led_assoc(local, 1); 3468 3469 vif_cfg->assoc = 1; 3470 3471 /* Enable ARP filtering */ 3472 if (vif_cfg->arp_addr_cnt) 3473 vif_changed |= BSS_CHANGED_ARP_FILTER; 3474 3475 if (ieee80211_vif_is_mld(&sdata->vif)) { 3476 for (link_id = 0; 3477 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3478 link_id++) { 3479 struct ieee80211_link_data *link; 3480 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3481 3482 if (!cbss || 3483 !(BIT(link_id) & 3484 ieee80211_vif_usable_links(&sdata->vif)) || 3485 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3486 continue; 3487 3488 link = sdata_dereference(sdata->link[link_id], sdata); 3489 if (WARN_ON(!link)) 3490 return; 3491 3492 ieee80211_link_info_change_notify(sdata, link, 3493 changed[link_id]); 3494 3495 ieee80211_recalc_smps(sdata, link); 3496 } 3497 3498 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3499 } else { 3500 ieee80211_bss_info_change_notify(sdata, 3501 vif_changed | changed[0]); 3502 } 3503 3504 ieee80211_recalc_ps(local); 3505 3506 /* leave this here to not change ordering in non-MLO cases */ 3507 if (!ieee80211_vif_is_mld(&sdata->vif)) 3508 ieee80211_recalc_smps(sdata, &sdata->deflink); 3509 ieee80211_recalc_ps_vif(sdata); 3510 3511 netif_carrier_on(sdata->dev); 3512 } 3513 3514 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3515 u16 stype, u16 reason, bool tx, 3516 u8 *frame_buf) 3517 { 3518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3519 struct ieee80211_local *local = sdata->local; 3520 unsigned int link_id; 3521 u64 changed = 0; 3522 struct ieee80211_prep_tx_info info = { 3523 .subtype = stype, 3524 }; 3525 3526 lockdep_assert_wiphy(local->hw.wiphy); 3527 3528 if (WARN_ON_ONCE(tx && !frame_buf)) 3529 return; 3530 3531 if (WARN_ON(!ifmgd->associated)) 3532 return; 3533 3534 ieee80211_stop_poll(sdata); 3535 3536 ifmgd->associated = false; 3537 3538 /* other links will be destroyed */ 3539 sdata->deflink.conf->bss = NULL; 3540 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 3541 3542 netif_carrier_off(sdata->dev); 3543 3544 /* 3545 * if we want to get out of ps before disassoc (why?) we have 3546 * to do it before sending disassoc, as otherwise the null-packet 3547 * won't be valid. 3548 */ 3549 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3550 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3551 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3552 } 3553 local->ps_sdata = NULL; 3554 3555 /* disable per-vif ps */ 3556 ieee80211_recalc_ps_vif(sdata); 3557 3558 /* make sure ongoing transmission finishes */ 3559 synchronize_net(); 3560 3561 /* 3562 * drop any frame before deauth/disassoc, this can be data or 3563 * management frame. Since we are disconnecting, we should not 3564 * insist sending these frames which can take time and delay 3565 * the disconnection and possible the roaming. 3566 */ 3567 if (tx) 3568 ieee80211_flush_queues(local, sdata, true); 3569 3570 /* deauthenticate/disassociate now */ 3571 if (tx || frame_buf) { 3572 /* 3573 * In multi channel scenarios guarantee that the virtual 3574 * interface is granted immediate airtime to transmit the 3575 * deauthentication frame by calling mgd_prepare_tx, if the 3576 * driver requested so. 3577 */ 3578 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP)) { 3579 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); 3580 link_id++) { 3581 struct ieee80211_link_data *link; 3582 3583 link = sdata_dereference(sdata->link[link_id], 3584 sdata); 3585 if (!link) 3586 continue; 3587 if (link->u.mgd.have_beacon) 3588 break; 3589 } 3590 if (link_id == IEEE80211_MLD_MAX_NUM_LINKS) { 3591 info.link_id = ffs(sdata->vif.active_links) - 1; 3592 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3593 } 3594 } 3595 3596 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 3597 sdata->vif.cfg.ap_addr, stype, 3598 reason, tx, frame_buf); 3599 } 3600 3601 /* flush out frame - make sure the deauth was actually sent */ 3602 if (tx) 3603 ieee80211_flush_queues(local, sdata, false); 3604 3605 drv_mgd_complete_tx(sdata->local, sdata, &info); 3606 3607 /* clear AP addr only after building the needed mgmt frames */ 3608 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3609 eth_zero_addr(sdata->vif.cfg.ap_addr); 3610 3611 sdata->vif.cfg.ssid_len = 0; 3612 3613 /* remove AP and TDLS peers */ 3614 sta_info_flush(sdata, -1); 3615 3616 /* finally reset all BSS / config parameters */ 3617 if (!ieee80211_vif_is_mld(&sdata->vif)) 3618 changed |= ieee80211_reset_erp_info(sdata); 3619 3620 ieee80211_led_assoc(local, 0); 3621 changed |= BSS_CHANGED_ASSOC; 3622 sdata->vif.cfg.assoc = false; 3623 3624 sdata->deflink.u.mgd.p2p_noa_index = -1; 3625 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 3626 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 3627 3628 /* on the next assoc, re-program HT/VHT parameters */ 3629 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 3630 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 3631 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 3632 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 3633 3634 /* 3635 * reset MU-MIMO ownership and group data in default link, 3636 * if used, other links are destroyed 3637 */ 3638 memset(sdata->vif.bss_conf.mu_group.membership, 0, 3639 sizeof(sdata->vif.bss_conf.mu_group.membership)); 3640 memset(sdata->vif.bss_conf.mu_group.position, 0, 3641 sizeof(sdata->vif.bss_conf.mu_group.position)); 3642 if (!ieee80211_vif_is_mld(&sdata->vif)) 3643 changed |= BSS_CHANGED_MU_GROUPS; 3644 sdata->vif.bss_conf.mu_mimo_owner = false; 3645 3646 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3647 3648 del_timer_sync(&local->dynamic_ps_timer); 3649 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 3650 3651 /* Disable ARP filtering */ 3652 if (sdata->vif.cfg.arp_addr_cnt) 3653 changed |= BSS_CHANGED_ARP_FILTER; 3654 3655 sdata->vif.bss_conf.qos = false; 3656 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3657 changed |= BSS_CHANGED_QOS; 3658 /* The BSSID (not really interesting) and HT changed */ 3659 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3660 ieee80211_bss_info_change_notify(sdata, changed); 3661 } else { 3662 ieee80211_vif_cfg_change_notify(sdata, changed); 3663 } 3664 3665 /* disassociated - set to defaults now */ 3666 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3667 3668 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3669 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3670 del_timer_sync(&sdata->u.mgd.timer); 3671 3672 sdata->vif.bss_conf.dtim_period = 0; 3673 sdata->vif.bss_conf.beacon_rate = NULL; 3674 3675 sdata->deflink.u.mgd.have_beacon = false; 3676 sdata->deflink.u.mgd.tracking_signal_avg = false; 3677 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3678 3679 ifmgd->flags = 0; 3680 3681 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3682 struct ieee80211_link_data *link; 3683 3684 link = sdata_dereference(sdata->link[link_id], sdata); 3685 if (!link) 3686 continue; 3687 ieee80211_link_release_channel(link); 3688 } 3689 3690 sdata->vif.bss_conf.csa_active = false; 3691 sdata->deflink.u.mgd.csa.blocked_tx = false; 3692 sdata->deflink.u.mgd.csa.waiting_bcn = false; 3693 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 3694 ieee80211_vif_unblock_queues_csa(sdata); 3695 3696 /* existing TX TSPEC sessions no longer exist */ 3697 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3698 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 3699 3700 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 3701 sdata->vif.bss_conf.pwr_reduction = 0; 3702 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 3703 3704 sdata->vif.cfg.eml_cap = 0; 3705 sdata->vif.cfg.eml_med_sync_delay = 0; 3706 sdata->vif.cfg.mld_capa_op = 0; 3707 3708 memset(&sdata->u.mgd.ttlm_info, 0, 3709 sizeof(sdata->u.mgd.ttlm_info)); 3710 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 3711 3712 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 3713 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3714 &ifmgd->neg_ttlm_timeout_work); 3715 3716 sdata->u.mgd.removed_links = 0; 3717 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3718 &sdata->u.mgd.ml_reconf_work); 3719 3720 wiphy_work_cancel(sdata->local->hw.wiphy, 3721 &ifmgd->teardown_ttlm_work); 3722 3723 ieee80211_vif_set_links(sdata, 0, 0); 3724 3725 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 3726 } 3727 3728 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3729 { 3730 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3731 struct ieee80211_local *local = sdata->local; 3732 3733 lockdep_assert_wiphy(local->hw.wiphy); 3734 3735 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3736 return; 3737 3738 __ieee80211_stop_poll(sdata); 3739 3740 ieee80211_recalc_ps(local); 3741 3742 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3743 return; 3744 3745 /* 3746 * We've received a probe response, but are not sure whether 3747 * we have or will be receiving any beacons or data, so let's 3748 * schedule the timers again, just in case. 3749 */ 3750 ieee80211_sta_reset_beacon_monitor(sdata); 3751 3752 mod_timer(&ifmgd->conn_mon_timer, 3753 round_jiffies_up(jiffies + 3754 IEEE80211_CONNECTION_IDLE_TIME)); 3755 } 3756 3757 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3758 struct ieee80211_hdr *hdr, 3759 u16 tx_time) 3760 { 3761 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3762 u16 tid; 3763 int ac; 3764 struct ieee80211_sta_tx_tspec *tx_tspec; 3765 unsigned long now = jiffies; 3766 3767 if (!ieee80211_is_data_qos(hdr->frame_control)) 3768 return; 3769 3770 tid = ieee80211_get_tid(hdr); 3771 ac = ieee80211_ac_from_tid(tid); 3772 tx_tspec = &ifmgd->tx_tspec[ac]; 3773 3774 if (likely(!tx_tspec->admitted_time)) 3775 return; 3776 3777 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3778 tx_tspec->consumed_tx_time = 0; 3779 tx_tspec->time_slice_start = now; 3780 3781 if (tx_tspec->downgraded) { 3782 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3783 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3784 &ifmgd->tx_tspec_wk, 0); 3785 } 3786 } 3787 3788 if (tx_tspec->downgraded) 3789 return; 3790 3791 tx_tspec->consumed_tx_time += tx_time; 3792 3793 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3794 tx_tspec->downgraded = true; 3795 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3796 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3797 &ifmgd->tx_tspec_wk, 0); 3798 } 3799 } 3800 3801 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3802 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3803 { 3804 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3805 3806 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3807 !sdata->u.mgd.probe_send_count) 3808 return; 3809 3810 if (ack) 3811 sdata->u.mgd.probe_send_count = 0; 3812 else 3813 sdata->u.mgd.nullfunc_failed = true; 3814 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3815 } 3816 3817 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3818 const u8 *src, const u8 *dst, 3819 const u8 *ssid, size_t ssid_len, 3820 struct ieee80211_channel *channel) 3821 { 3822 struct sk_buff *skb; 3823 3824 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3825 ssid, ssid_len, NULL, 0, 3826 IEEE80211_PROBE_FLAG_DIRECTED); 3827 if (skb) 3828 ieee80211_tx_skb(sdata, skb); 3829 } 3830 3831 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3832 { 3833 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3834 u8 *dst = sdata->vif.cfg.ap_addr; 3835 u8 unicast_limit = max(1, max_probe_tries - 3); 3836 struct sta_info *sta; 3837 3838 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3839 3840 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 3841 return; 3842 3843 /* 3844 * Try sending broadcast probe requests for the last three 3845 * probe requests after the first ones failed since some 3846 * buggy APs only support broadcast probe requests. 3847 */ 3848 if (ifmgd->probe_send_count >= unicast_limit) 3849 dst = NULL; 3850 3851 /* 3852 * When the hardware reports an accurate Tx ACK status, it's 3853 * better to send a nullfunc frame instead of a probe request, 3854 * as it will kick us off the AP quickly if we aren't associated 3855 * anymore. The timeout will be reset if the frame is ACKed by 3856 * the AP. 3857 */ 3858 ifmgd->probe_send_count++; 3859 3860 if (dst) { 3861 sta = sta_info_get(sdata, dst); 3862 if (!WARN_ON(!sta)) 3863 ieee80211_check_fast_rx(sta); 3864 } 3865 3866 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3867 ifmgd->nullfunc_failed = false; 3868 ieee80211_send_nullfunc(sdata->local, sdata, false); 3869 } else { 3870 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3871 sdata->vif.cfg.ssid, 3872 sdata->vif.cfg.ssid_len, 3873 sdata->deflink.conf->bss->channel); 3874 } 3875 3876 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3877 run_again(sdata, ifmgd->probe_timeout); 3878 } 3879 3880 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3881 bool beacon) 3882 { 3883 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3884 bool already = false; 3885 3886 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3887 3888 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 3889 return; 3890 3891 if (!ieee80211_sdata_running(sdata)) 3892 return; 3893 3894 if (!ifmgd->associated) 3895 return; 3896 3897 if (sdata->local->tmp_channel || sdata->local->scanning) 3898 return; 3899 3900 if (sdata->local->suspending) { 3901 /* reschedule after resume */ 3902 ieee80211_reset_ap_probe(sdata); 3903 return; 3904 } 3905 3906 if (beacon) { 3907 mlme_dbg_ratelimited(sdata, 3908 "detected beacon loss from AP (missed %d beacons) - probing\n", 3909 beacon_loss_count); 3910 3911 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3912 } 3913 3914 /* 3915 * The driver/our work has already reported this event or the 3916 * connection monitoring has kicked in and we have already sent 3917 * a probe request. Or maybe the AP died and the driver keeps 3918 * reporting until we disassociate... 3919 * 3920 * In either case we have to ignore the current call to this 3921 * function (except for setting the correct probe reason bit) 3922 * because otherwise we would reset the timer every time and 3923 * never check whether we received a probe response! 3924 */ 3925 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3926 already = true; 3927 3928 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3929 3930 if (already) 3931 return; 3932 3933 ieee80211_recalc_ps(sdata->local); 3934 3935 ifmgd->probe_send_count = 0; 3936 ieee80211_mgd_probe_ap_send(sdata); 3937 } 3938 3939 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3940 struct ieee80211_vif *vif) 3941 { 3942 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3943 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3944 struct cfg80211_bss *cbss; 3945 struct sk_buff *skb; 3946 const struct element *ssid; 3947 int ssid_len; 3948 3949 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3950 3951 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3952 ieee80211_vif_is_mld(&sdata->vif))) 3953 return NULL; 3954 3955 if (ifmgd->associated) 3956 cbss = sdata->deflink.conf->bss; 3957 else if (ifmgd->auth_data) 3958 cbss = ifmgd->auth_data->bss; 3959 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3960 cbss = ifmgd->assoc_data->link[0].bss; 3961 else 3962 return NULL; 3963 3964 rcu_read_lock(); 3965 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3966 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3967 "invalid SSID element (len=%d)", 3968 ssid ? ssid->datalen : -1)) 3969 ssid_len = 0; 3970 else 3971 ssid_len = ssid->datalen; 3972 3973 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3974 (u32) -1, cbss->channel, 3975 ssid->data, ssid_len, 3976 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3977 rcu_read_unlock(); 3978 3979 return skb; 3980 } 3981 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3982 3983 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3984 const u8 *buf, size_t len, bool tx, 3985 u16 reason, bool reconnect) 3986 { 3987 struct ieee80211_event event = { 3988 .type = MLME_EVENT, 3989 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3990 .u.mlme.reason = reason, 3991 }; 3992 3993 if (tx) 3994 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3995 else 3996 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3997 3998 drv_event_callback(sdata->local, sdata, &event); 3999 } 4000 4001 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4002 { 4003 struct ieee80211_local *local = sdata->local; 4004 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4005 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4006 bool tx = false; 4007 4008 lockdep_assert_wiphy(local->hw.wiphy); 4009 4010 if (!ifmgd->associated) 4011 return; 4012 4013 /* only transmit if we have a link that makes that worthwhile */ 4014 for (unsigned int link_id = 0; 4015 link_id < ARRAY_SIZE(sdata->link); 4016 link_id++) { 4017 struct ieee80211_link_data *link; 4018 4019 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4020 continue; 4021 4022 link = sdata_dereference(sdata->link[link_id], sdata); 4023 if (WARN_ON_ONCE(!link)) 4024 continue; 4025 4026 if (link->u.mgd.csa.blocked_tx) 4027 continue; 4028 4029 tx = true; 4030 break; 4031 } 4032 4033 if (!ifmgd->driver_disconnect) { 4034 unsigned int link_id; 4035 4036 /* 4037 * AP is probably out of range (or not reachable for another 4038 * reason) so remove the bss structs for that AP. In the case 4039 * of multi-link, it's not clear that all of them really are 4040 * out of range, but if they weren't the driver likely would 4041 * have switched to just have a single link active? 4042 */ 4043 for (link_id = 0; 4044 link_id < ARRAY_SIZE(sdata->link); 4045 link_id++) { 4046 struct ieee80211_link_data *link; 4047 4048 link = sdata_dereference(sdata->link[link_id], sdata); 4049 if (!link) 4050 continue; 4051 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4052 link->conf->bss = NULL; 4053 } 4054 } 4055 4056 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4057 ifmgd->driver_disconnect ? 4058 WLAN_REASON_DEAUTH_LEAVING : 4059 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4060 tx, frame_buf); 4061 /* the other links will be destroyed */ 4062 sdata->vif.bss_conf.csa_active = false; 4063 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4064 sdata->deflink.u.mgd.csa.blocked_tx = false; 4065 ieee80211_vif_unblock_queues_csa(sdata); 4066 4067 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 4068 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4069 ifmgd->reconnect); 4070 ifmgd->reconnect = false; 4071 } 4072 4073 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4074 struct wiphy_work *work) 4075 { 4076 struct ieee80211_sub_if_data *sdata = 4077 container_of(work, struct ieee80211_sub_if_data, 4078 u.mgd.beacon_connection_loss_work); 4079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4080 4081 if (ifmgd->connection_loss) { 4082 sdata_info(sdata, "Connection to AP %pM lost\n", 4083 sdata->vif.cfg.ap_addr); 4084 __ieee80211_disconnect(sdata); 4085 ifmgd->connection_loss = false; 4086 } else if (ifmgd->driver_disconnect) { 4087 sdata_info(sdata, 4088 "Driver requested disconnection from AP %pM\n", 4089 sdata->vif.cfg.ap_addr); 4090 __ieee80211_disconnect(sdata); 4091 ifmgd->driver_disconnect = false; 4092 } else { 4093 if (ifmgd->associated) 4094 sdata->deflink.u.mgd.beacon_loss_count++; 4095 ieee80211_mgd_probe_ap(sdata, true); 4096 } 4097 } 4098 4099 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4100 struct wiphy_work *work) 4101 { 4102 struct ieee80211_sub_if_data *sdata = 4103 container_of(work, struct ieee80211_sub_if_data, 4104 u.mgd.csa_connection_drop_work); 4105 4106 __ieee80211_disconnect(sdata); 4107 } 4108 4109 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4110 { 4111 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4112 struct ieee80211_hw *hw = &sdata->local->hw; 4113 4114 trace_api_beacon_loss(sdata); 4115 4116 sdata->u.mgd.connection_loss = false; 4117 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4118 } 4119 EXPORT_SYMBOL(ieee80211_beacon_loss); 4120 4121 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4122 { 4123 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4124 struct ieee80211_hw *hw = &sdata->local->hw; 4125 4126 trace_api_connection_loss(sdata); 4127 4128 sdata->u.mgd.connection_loss = true; 4129 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4130 } 4131 EXPORT_SYMBOL(ieee80211_connection_loss); 4132 4133 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4134 { 4135 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4136 struct ieee80211_hw *hw = &sdata->local->hw; 4137 4138 trace_api_disconnect(sdata, reconnect); 4139 4140 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4141 return; 4142 4143 sdata->u.mgd.driver_disconnect = true; 4144 sdata->u.mgd.reconnect = reconnect; 4145 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4146 } 4147 EXPORT_SYMBOL(ieee80211_disconnect); 4148 4149 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4150 bool assoc) 4151 { 4152 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4153 4154 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4155 4156 if (!assoc) { 4157 /* 4158 * we are not authenticated yet, the only timer that could be 4159 * running is the timeout for the authentication response which 4160 * which is not relevant anymore. 4161 */ 4162 del_timer_sync(&sdata->u.mgd.timer); 4163 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4164 4165 /* other links are destroyed */ 4166 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4167 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4168 BSS_CHANGED_BSSID); 4169 sdata->u.mgd.flags = 0; 4170 4171 ieee80211_link_release_channel(&sdata->deflink); 4172 ieee80211_vif_set_links(sdata, 0, 0); 4173 } 4174 4175 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4176 kfree(auth_data); 4177 sdata->u.mgd.auth_data = NULL; 4178 } 4179 4180 enum assoc_status { 4181 ASSOC_SUCCESS, 4182 ASSOC_REJECTED, 4183 ASSOC_TIMEOUT, 4184 ASSOC_ABANDON, 4185 }; 4186 4187 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4188 enum assoc_status status) 4189 { 4190 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4191 4192 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4193 4194 if (status != ASSOC_SUCCESS) { 4195 /* 4196 * we are not associated yet, the only timer that could be 4197 * running is the timeout for the association response which 4198 * which is not relevant anymore. 4199 */ 4200 del_timer_sync(&sdata->u.mgd.timer); 4201 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4202 4203 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4204 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4205 BSS_CHANGED_BSSID); 4206 sdata->u.mgd.flags = 0; 4207 sdata->vif.bss_conf.mu_mimo_owner = false; 4208 4209 if (status != ASSOC_REJECTED) { 4210 struct cfg80211_assoc_failure data = { 4211 .timeout = status == ASSOC_TIMEOUT, 4212 }; 4213 int i; 4214 4215 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4216 ARRAY_SIZE(assoc_data->link)); 4217 4218 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4219 data.bss[i] = assoc_data->link[i].bss; 4220 4221 if (ieee80211_vif_is_mld(&sdata->vif)) 4222 data.ap_mld_addr = assoc_data->ap_addr; 4223 4224 cfg80211_assoc_failure(sdata->dev, &data); 4225 } 4226 4227 ieee80211_link_release_channel(&sdata->deflink); 4228 ieee80211_vif_set_links(sdata, 0, 0); 4229 } 4230 4231 kfree(assoc_data); 4232 sdata->u.mgd.assoc_data = NULL; 4233 } 4234 4235 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4236 struct ieee80211_mgmt *mgmt, size_t len) 4237 { 4238 struct ieee80211_local *local = sdata->local; 4239 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4240 const struct element *challenge; 4241 u8 *pos; 4242 u32 tx_flags = 0; 4243 struct ieee80211_prep_tx_info info = { 4244 .subtype = IEEE80211_STYPE_AUTH, 4245 .link_id = auth_data->link_id, 4246 }; 4247 4248 pos = mgmt->u.auth.variable; 4249 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4250 len - (pos - (u8 *)mgmt)); 4251 if (!challenge) 4252 return; 4253 auth_data->expected_transaction = 4; 4254 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4255 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4256 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4257 IEEE80211_TX_INTFL_MLME_CONN_TX; 4258 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4259 (void *)challenge, 4260 challenge->datalen + sizeof(*challenge), 4261 auth_data->ap_addr, auth_data->ap_addr, 4262 auth_data->key, auth_data->key_len, 4263 auth_data->key_idx, tx_flags); 4264 } 4265 4266 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4267 { 4268 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4269 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4270 struct sta_info *sta; 4271 4272 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4273 4274 sdata_info(sdata, "authenticated\n"); 4275 ifmgd->auth_data->done = true; 4276 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4277 ifmgd->auth_data->timeout_started = true; 4278 run_again(sdata, ifmgd->auth_data->timeout); 4279 4280 /* move station state to auth */ 4281 sta = sta_info_get(sdata, ap_addr); 4282 if (!sta) { 4283 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4284 return false; 4285 } 4286 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4287 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4288 return false; 4289 } 4290 4291 return true; 4292 } 4293 4294 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4295 struct ieee80211_mgmt *mgmt, size_t len) 4296 { 4297 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4298 u16 auth_alg, auth_transaction, status_code; 4299 struct ieee80211_event event = { 4300 .type = MLME_EVENT, 4301 .u.mlme.data = AUTH_EVENT, 4302 }; 4303 struct ieee80211_prep_tx_info info = { 4304 .subtype = IEEE80211_STYPE_AUTH, 4305 }; 4306 4307 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4308 4309 if (len < 24 + 6) 4310 return; 4311 4312 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4313 return; 4314 4315 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4316 return; 4317 4318 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4319 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4320 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4321 4322 if (auth_alg != ifmgd->auth_data->algorithm || 4323 (auth_alg != WLAN_AUTH_SAE && 4324 auth_transaction != ifmgd->auth_data->expected_transaction) || 4325 (auth_alg == WLAN_AUTH_SAE && 4326 (auth_transaction < ifmgd->auth_data->expected_transaction || 4327 auth_transaction > 2))) { 4328 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4329 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4330 auth_transaction, 4331 ifmgd->auth_data->expected_transaction); 4332 goto notify_driver; 4333 } 4334 4335 if (status_code != WLAN_STATUS_SUCCESS) { 4336 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4337 4338 if (auth_alg == WLAN_AUTH_SAE && 4339 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4340 (auth_transaction == 1 && 4341 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4342 status_code == WLAN_STATUS_SAE_PK)))) { 4343 /* waiting for userspace now */ 4344 ifmgd->auth_data->waiting = true; 4345 ifmgd->auth_data->timeout = 4346 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4347 ifmgd->auth_data->timeout_started = true; 4348 run_again(sdata, ifmgd->auth_data->timeout); 4349 goto notify_driver; 4350 } 4351 4352 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4353 mgmt->sa, status_code); 4354 ieee80211_destroy_auth_data(sdata, false); 4355 event.u.mlme.status = MLME_DENIED; 4356 event.u.mlme.reason = status_code; 4357 drv_event_callback(sdata->local, sdata, &event); 4358 goto notify_driver; 4359 } 4360 4361 switch (ifmgd->auth_data->algorithm) { 4362 case WLAN_AUTH_OPEN: 4363 case WLAN_AUTH_LEAP: 4364 case WLAN_AUTH_FT: 4365 case WLAN_AUTH_SAE: 4366 case WLAN_AUTH_FILS_SK: 4367 case WLAN_AUTH_FILS_SK_PFS: 4368 case WLAN_AUTH_FILS_PK: 4369 break; 4370 case WLAN_AUTH_SHARED_KEY: 4371 if (ifmgd->auth_data->expected_transaction != 4) { 4372 ieee80211_auth_challenge(sdata, mgmt, len); 4373 /* need another frame */ 4374 return; 4375 } 4376 break; 4377 default: 4378 WARN_ONCE(1, "invalid auth alg %d", 4379 ifmgd->auth_data->algorithm); 4380 goto notify_driver; 4381 } 4382 4383 event.u.mlme.status = MLME_SUCCESS; 4384 info.success = 1; 4385 drv_event_callback(sdata->local, sdata, &event); 4386 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4387 (auth_transaction == 2 && 4388 ifmgd->auth_data->expected_transaction == 2)) { 4389 if (!ieee80211_mark_sta_auth(sdata)) 4390 return; /* ignore frame -- wait for timeout */ 4391 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4392 auth_transaction == 2) { 4393 sdata_info(sdata, "SAE peer confirmed\n"); 4394 ifmgd->auth_data->peer_confirmed = true; 4395 } 4396 4397 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4398 notify_driver: 4399 drv_mgd_complete_tx(sdata->local, sdata, &info); 4400 } 4401 4402 #define case_WLAN(type) \ 4403 case WLAN_REASON_##type: return #type 4404 4405 const char *ieee80211_get_reason_code_string(u16 reason_code) 4406 { 4407 switch (reason_code) { 4408 case_WLAN(UNSPECIFIED); 4409 case_WLAN(PREV_AUTH_NOT_VALID); 4410 case_WLAN(DEAUTH_LEAVING); 4411 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4412 case_WLAN(DISASSOC_AP_BUSY); 4413 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4414 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4415 case_WLAN(DISASSOC_STA_HAS_LEFT); 4416 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4417 case_WLAN(DISASSOC_BAD_POWER); 4418 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4419 case_WLAN(INVALID_IE); 4420 case_WLAN(MIC_FAILURE); 4421 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4422 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4423 case_WLAN(IE_DIFFERENT); 4424 case_WLAN(INVALID_GROUP_CIPHER); 4425 case_WLAN(INVALID_PAIRWISE_CIPHER); 4426 case_WLAN(INVALID_AKMP); 4427 case_WLAN(UNSUPP_RSN_VERSION); 4428 case_WLAN(INVALID_RSN_IE_CAP); 4429 case_WLAN(IEEE8021X_FAILED); 4430 case_WLAN(CIPHER_SUITE_REJECTED); 4431 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4432 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4433 case_WLAN(DISASSOC_LOW_ACK); 4434 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4435 case_WLAN(QSTA_LEAVE_QBSS); 4436 case_WLAN(QSTA_NOT_USE); 4437 case_WLAN(QSTA_REQUIRE_SETUP); 4438 case_WLAN(QSTA_TIMEOUT); 4439 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4440 case_WLAN(MESH_PEER_CANCELED); 4441 case_WLAN(MESH_MAX_PEERS); 4442 case_WLAN(MESH_CONFIG); 4443 case_WLAN(MESH_CLOSE); 4444 case_WLAN(MESH_MAX_RETRIES); 4445 case_WLAN(MESH_CONFIRM_TIMEOUT); 4446 case_WLAN(MESH_INVALID_GTK); 4447 case_WLAN(MESH_INCONSISTENT_PARAM); 4448 case_WLAN(MESH_INVALID_SECURITY); 4449 case_WLAN(MESH_PATH_ERROR); 4450 case_WLAN(MESH_PATH_NOFORWARD); 4451 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4452 case_WLAN(MAC_EXISTS_IN_MBSS); 4453 case_WLAN(MESH_CHAN_REGULATORY); 4454 case_WLAN(MESH_CHAN); 4455 default: return "<unknown>"; 4456 } 4457 } 4458 4459 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4460 struct ieee80211_mgmt *mgmt, size_t len) 4461 { 4462 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4463 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4464 4465 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4466 4467 if (len < 24 + 2) 4468 return; 4469 4470 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4471 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4472 return; 4473 } 4474 4475 if (ifmgd->associated && 4476 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4477 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4478 sdata->vif.cfg.ap_addr, reason_code, 4479 ieee80211_get_reason_code_string(reason_code)); 4480 4481 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4482 4483 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4484 reason_code, false); 4485 return; 4486 } 4487 4488 if (ifmgd->assoc_data && 4489 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4490 sdata_info(sdata, 4491 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4492 ifmgd->assoc_data->ap_addr, reason_code, 4493 ieee80211_get_reason_code_string(reason_code)); 4494 4495 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4496 4497 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4498 return; 4499 } 4500 } 4501 4502 4503 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4504 struct ieee80211_mgmt *mgmt, size_t len) 4505 { 4506 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4507 u16 reason_code; 4508 4509 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4510 4511 if (len < 24 + 2) 4512 return; 4513 4514 if (!ifmgd->associated || 4515 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 4516 return; 4517 4518 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 4519 4520 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4521 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4522 return; 4523 } 4524 4525 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 4526 sdata->vif.cfg.ap_addr, reason_code, 4527 ieee80211_get_reason_code_string(reason_code)); 4528 4529 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4530 4531 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 4532 false); 4533 } 4534 4535 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 4536 u8 *supp_rates, unsigned int supp_rates_len, 4537 u32 *rates, u32 *basic_rates, 4538 bool *have_higher_than_11mbit, 4539 int *min_rate, int *min_rate_index) 4540 { 4541 int i, j; 4542 4543 for (i = 0; i < supp_rates_len; i++) { 4544 int rate = supp_rates[i] & 0x7f; 4545 bool is_basic = !!(supp_rates[i] & 0x80); 4546 4547 if ((rate * 5) > 110) 4548 *have_higher_than_11mbit = true; 4549 4550 /* 4551 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 4552 * selectors since they're not rates. 4553 * 4554 * Note: Even though the membership selector and the basic 4555 * rate flag share the same bit, they are not exactly 4556 * the same. 4557 */ 4558 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 4559 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 4560 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 4561 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 4562 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 4563 continue; 4564 4565 for (j = 0; j < sband->n_bitrates; j++) { 4566 struct ieee80211_rate *br; 4567 int brate; 4568 4569 br = &sband->bitrates[j]; 4570 4571 brate = DIV_ROUND_UP(br->bitrate, 5); 4572 if (brate == rate) { 4573 *rates |= BIT(j); 4574 if (is_basic) 4575 *basic_rates |= BIT(j); 4576 if ((rate * 5) < *min_rate) { 4577 *min_rate = rate * 5; 4578 *min_rate_index = j; 4579 } 4580 break; 4581 } 4582 } 4583 } 4584 } 4585 4586 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 4587 struct ieee80211_supported_band *sband, 4588 const struct link_sta_info *link_sta, 4589 const struct ieee802_11_elems *elems) 4590 { 4591 const struct ieee80211_sta_he_cap *own_he_cap = 4592 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4593 4594 if (elems->ext_capab_len < 10) 4595 return false; 4596 4597 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 4598 return false; 4599 4600 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 4601 IEEE80211_HE_MAC_CAP0_TWT_RES && 4602 own_he_cap && 4603 (own_he_cap->he_cap_elem.mac_cap_info[0] & 4604 IEEE80211_HE_MAC_CAP0_TWT_REQ); 4605 } 4606 4607 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 4608 struct ieee80211_supported_band *sband, 4609 struct ieee80211_link_data *link, 4610 struct link_sta_info *link_sta, 4611 struct ieee802_11_elems *elems) 4612 { 4613 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 4614 4615 if (link->conf->twt_requester != twt) { 4616 link->conf->twt_requester = twt; 4617 return BSS_CHANGED_TWT; 4618 } 4619 return 0; 4620 } 4621 4622 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 4623 struct ieee80211_bss_conf *bss_conf, 4624 struct ieee80211_supported_band *sband, 4625 struct link_sta_info *link_sta) 4626 { 4627 const struct ieee80211_sta_he_cap *own_he_cap = 4628 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4629 4630 return bss_conf->he_support && 4631 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 4632 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 4633 own_he_cap && 4634 (own_he_cap->he_cap_elem.mac_cap_info[2] & 4635 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 4636 } 4637 4638 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 4639 struct link_sta_info *link_sta, 4640 struct cfg80211_bss *cbss, 4641 struct ieee80211_mgmt *mgmt, 4642 const u8 *elem_start, 4643 unsigned int elem_len, 4644 u64 *changed) 4645 { 4646 struct ieee80211_sub_if_data *sdata = link->sdata; 4647 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4648 struct ieee80211_bss_conf *bss_conf = link->conf; 4649 struct ieee80211_local *local = sdata->local; 4650 unsigned int link_id = link->link_id; 4651 struct ieee80211_elems_parse_params parse_params = { 4652 .mode = link->u.mgd.conn.mode, 4653 .start = elem_start, 4654 .len = elem_len, 4655 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4656 .from_ap = true, 4657 }; 4658 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4659 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4660 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4661 const struct cfg80211_bss_ies *bss_ies = NULL; 4662 struct ieee80211_supported_band *sband; 4663 struct ieee802_11_elems *elems; 4664 const __le16 prof_bss_param_ch_present = 4665 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 4666 u16 capab_info; 4667 bool ret; 4668 4669 elems = ieee802_11_parse_elems_full(&parse_params); 4670 if (!elems) 4671 return false; 4672 4673 if (link_id == assoc_data->assoc_link_id) { 4674 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4675 4676 /* 4677 * we should not get to this flow unless the association was 4678 * successful, so set the status directly to success 4679 */ 4680 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4681 if (elems->ml_basic) { 4682 int bss_param_ch_cnt = 4683 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 4684 4685 if (bss_param_ch_cnt < 0) { 4686 ret = false; 4687 goto out; 4688 } 4689 link->u.mgd.bss_param_ch_cnt = bss_param_ch_cnt; 4690 } 4691 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 4692 !elems->prof || 4693 !(elems->prof->control & prof_bss_param_ch_present)) { 4694 ret = false; 4695 goto out; 4696 } else { 4697 const u8 *ptr = elems->prof->variable + 4698 elems->prof->sta_info_len - 1; 4699 4700 /* 4701 * During parsing, we validated that these fields exist, 4702 * otherwise elems->prof would have been set to NULL. 4703 */ 4704 capab_info = get_unaligned_le16(ptr); 4705 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4706 link->u.mgd.bss_param_ch_cnt = 4707 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4708 4709 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4710 link_info(link, "association response status code=%u\n", 4711 assoc_data->link[link_id].status); 4712 ret = true; 4713 goto out; 4714 } 4715 } 4716 4717 if (!is_s1g && !elems->supp_rates) { 4718 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4719 ret = false; 4720 goto out; 4721 } 4722 4723 link->u.mgd.tdls_chan_switch_prohibited = 4724 elems->ext_capab && elems->ext_capab_len >= 5 && 4725 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4726 4727 /* 4728 * Some APs are erroneously not including some information in their 4729 * (re)association response frames. Try to recover by using the data 4730 * from the beacon or probe response. This seems to afflict mobile 4731 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4732 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4733 */ 4734 if (!is_6ghz && 4735 ((assoc_data->wmm && !elems->wmm_param) || 4736 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4737 (!elems->ht_cap_elem || !elems->ht_operation)) || 4738 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4739 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4740 const struct cfg80211_bss_ies *ies; 4741 struct ieee802_11_elems *bss_elems; 4742 4743 rcu_read_lock(); 4744 ies = rcu_dereference(cbss->ies); 4745 if (ies) 4746 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4747 GFP_ATOMIC); 4748 rcu_read_unlock(); 4749 if (!bss_ies) { 4750 ret = false; 4751 goto out; 4752 } 4753 4754 parse_params.start = bss_ies->data; 4755 parse_params.len = bss_ies->len; 4756 parse_params.bss = cbss; 4757 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4758 if (!bss_elems) { 4759 ret = false; 4760 goto out; 4761 } 4762 4763 if (assoc_data->wmm && 4764 !elems->wmm_param && bss_elems->wmm_param) { 4765 elems->wmm_param = bss_elems->wmm_param; 4766 sdata_info(sdata, 4767 "AP bug: WMM param missing from AssocResp\n"); 4768 } 4769 4770 /* 4771 * Also check if we requested HT/VHT, otherwise the AP doesn't 4772 * have to include the IEs in the (re)association response. 4773 */ 4774 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4775 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4776 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4777 sdata_info(sdata, 4778 "AP bug: HT capability missing from AssocResp\n"); 4779 } 4780 if (!elems->ht_operation && bss_elems->ht_operation && 4781 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4782 elems->ht_operation = bss_elems->ht_operation; 4783 sdata_info(sdata, 4784 "AP bug: HT operation missing from AssocResp\n"); 4785 } 4786 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4787 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4788 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4789 sdata_info(sdata, 4790 "AP bug: VHT capa missing from AssocResp\n"); 4791 } 4792 if (!elems->vht_operation && bss_elems->vht_operation && 4793 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4794 elems->vht_operation = bss_elems->vht_operation; 4795 sdata_info(sdata, 4796 "AP bug: VHT operation missing from AssocResp\n"); 4797 } 4798 4799 kfree(bss_elems); 4800 } 4801 4802 /* 4803 * We previously checked these in the beacon/probe response, so 4804 * they should be present here. This is just a safety net. 4805 * Note that the ieee80211_config_bw() below would also check 4806 * for this (and more), but this has better error reporting. 4807 */ 4808 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4809 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4810 sdata_info(sdata, 4811 "HT AP is missing WMM params or HT capability/operation\n"); 4812 ret = false; 4813 goto out; 4814 } 4815 4816 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4817 (!elems->vht_cap_elem || !elems->vht_operation)) { 4818 sdata_info(sdata, 4819 "VHT AP is missing VHT capability/operation\n"); 4820 ret = false; 4821 goto out; 4822 } 4823 4824 /* check/update if AP changed anything in assoc response vs. scan */ 4825 if (ieee80211_config_bw(link, elems, 4826 link_id == assoc_data->assoc_link_id, 4827 changed)) { 4828 ret = false; 4829 goto out; 4830 } 4831 4832 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 4833 ret = false; 4834 goto out; 4835 } 4836 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 4837 4838 /* Set up internal HT/VHT capabilities */ 4839 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 4840 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4841 elems->ht_cap_elem, 4842 link_sta); 4843 4844 if (elems->vht_cap_elem && 4845 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4846 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 4847 const struct cfg80211_bss_ies *ies; 4848 4849 /* 4850 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 4851 * too large maximum MPDU length in the association response 4852 * (indicating 12k) that it cannot actually process ... 4853 * Work around that. 4854 */ 4855 rcu_read_lock(); 4856 ies = rcu_dereference(cbss->ies); 4857 if (ies) { 4858 const struct element *elem; 4859 4860 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 4861 ies->data, ies->len); 4862 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 4863 bss_vht_cap = (const void *)elem->data; 4864 } 4865 4866 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4867 elems->vht_cap_elem, 4868 bss_vht_cap, link_sta); 4869 rcu_read_unlock(); 4870 } 4871 4872 if (elems->he_operation && 4873 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 4874 elems->he_cap) { 4875 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4876 elems->he_cap, 4877 elems->he_cap_len, 4878 elems->he_6ghz_capa, 4879 link_sta); 4880 4881 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4882 if (elems->rsnx && elems->rsnx_len && 4883 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4884 wiphy_ext_feature_isset(local->hw.wiphy, 4885 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4886 bss_conf->twt_protected = true; 4887 else 4888 bss_conf->twt_protected = false; 4889 4890 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4891 link_sta, elems); 4892 4893 if (elems->eht_operation && elems->eht_cap && 4894 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 4895 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4896 elems->he_cap, 4897 elems->he_cap_len, 4898 elems->eht_cap, 4899 elems->eht_cap_len, 4900 link_sta); 4901 4902 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4903 } else { 4904 bss_conf->eht_support = false; 4905 } 4906 } else { 4907 bss_conf->he_support = false; 4908 bss_conf->twt_requester = false; 4909 bss_conf->twt_protected = false; 4910 bss_conf->eht_support = false; 4911 } 4912 4913 bss_conf->twt_broadcast = 4914 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4915 4916 if (bss_conf->he_support) { 4917 bss_conf->he_bss_color.color = 4918 le32_get_bits(elems->he_operation->he_oper_params, 4919 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4920 bss_conf->he_bss_color.partial = 4921 le32_get_bits(elems->he_operation->he_oper_params, 4922 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4923 bss_conf->he_bss_color.enabled = 4924 !le32_get_bits(elems->he_operation->he_oper_params, 4925 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4926 4927 if (bss_conf->he_bss_color.enabled) 4928 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4929 4930 bss_conf->htc_trig_based_pkt_ext = 4931 le32_get_bits(elems->he_operation->he_oper_params, 4932 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4933 bss_conf->frame_time_rts_th = 4934 le32_get_bits(elems->he_operation->he_oper_params, 4935 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4936 4937 bss_conf->uora_exists = !!elems->uora_element; 4938 if (elems->uora_element) 4939 bss_conf->uora_ocw_range = elems->uora_element[0]; 4940 4941 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4942 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4943 /* TODO: OPEN: what happens if BSS color disable is set? */ 4944 } 4945 4946 if (cbss->transmitted_bss) { 4947 bss_conf->nontransmitted = true; 4948 ether_addr_copy(bss_conf->transmitter_bssid, 4949 cbss->transmitted_bss->bssid); 4950 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4951 bss_conf->bssid_index = cbss->bssid_index; 4952 } 4953 4954 /* 4955 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4956 * in their association response, so ignore that data for our own 4957 * configuration. If it changed since the last beacon, we'll get the 4958 * next beacon and update then. 4959 */ 4960 4961 /* 4962 * If an operating mode notification IE is present, override the 4963 * NSS calculation (that would be done in rate_control_rate_init()) 4964 * and use the # of streams from that element. 4965 */ 4966 if (elems->opmode_notif && 4967 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4968 u8 nss; 4969 4970 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4971 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4972 nss += 1; 4973 link_sta->pub->rx_nss = nss; 4974 } 4975 4976 /* 4977 * Always handle WMM once after association regardless 4978 * of the first value the AP uses. Setting -1 here has 4979 * that effect because the AP values is an unsigned 4980 * 4-bit value. 4981 */ 4982 link->u.mgd.wmm_last_param_set = -1; 4983 link->u.mgd.mu_edca_last_param_set = -1; 4984 4985 if (link->u.mgd.disable_wmm_tracking) { 4986 ieee80211_set_wmm_default(link, false, false); 4987 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4988 elems->wmm_param_len, 4989 elems->mu_edca_param_set)) { 4990 /* still enable QoS since we might have HT/VHT */ 4991 ieee80211_set_wmm_default(link, false, true); 4992 /* disable WMM tracking in this case to disable 4993 * tracking WMM parameter changes in the beacon if 4994 * the parameters weren't actually valid. Doing so 4995 * avoids changing parameters very strangely when 4996 * the AP is going back and forth between valid and 4997 * invalid parameters. 4998 */ 4999 link->u.mgd.disable_wmm_tracking = true; 5000 } 5001 5002 if (elems->max_idle_period_ie) { 5003 bss_conf->max_idle_period = 5004 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5005 bss_conf->protected_keep_alive = 5006 !!(elems->max_idle_period_ie->idle_options & 5007 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5008 *changed |= BSS_CHANGED_KEEP_ALIVE; 5009 } else { 5010 bss_conf->max_idle_period = 0; 5011 bss_conf->protected_keep_alive = false; 5012 } 5013 5014 /* set assoc capability (AID was already set earlier), 5015 * ieee80211_set_associated() will tell the driver */ 5016 bss_conf->assoc_capability = capab_info; 5017 5018 ret = true; 5019 out: 5020 kfree(elems); 5021 kfree(bss_ies); 5022 return ret; 5023 } 5024 5025 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5026 struct sta_info *sta, 5027 struct link_sta_info *link_sta, 5028 struct cfg80211_bss *cbss) 5029 { 5030 struct ieee80211_sub_if_data *sdata = link->sdata; 5031 struct ieee80211_local *local = sdata->local; 5032 struct ieee80211_bss *bss = (void *)cbss->priv; 5033 u32 rates = 0, basic_rates = 0; 5034 bool have_higher_than_11mbit = false; 5035 int min_rate = INT_MAX, min_rate_index = -1; 5036 struct ieee80211_supported_band *sband; 5037 5038 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5039 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5040 5041 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5042 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5043 ieee80211_s1g_sta_rate_init(sta); 5044 return 0; 5045 } 5046 5047 sband = local->hw.wiphy->bands[cbss->channel->band]; 5048 5049 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5050 &rates, &basic_rates, &have_higher_than_11mbit, 5051 &min_rate, &min_rate_index); 5052 5053 /* 5054 * This used to be a workaround for basic rates missing 5055 * in the association response frame. Now that we no 5056 * longer use the basic rates from there, it probably 5057 * doesn't happen any more, but keep the workaround so 5058 * in case some *other* APs are buggy in different ways 5059 * we can connect -- with a warning. 5060 * Allow this workaround only in case the AP provided at least 5061 * one rate. 5062 */ 5063 if (min_rate_index < 0) { 5064 link_info(link, "No legacy rates in association response\n"); 5065 return -EINVAL; 5066 } else if (!basic_rates) { 5067 link_info(link, "No basic rates, using min rate instead\n"); 5068 basic_rates = BIT(min_rate_index); 5069 } 5070 5071 if (rates) 5072 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5073 else 5074 link_info(link, "No rates found, keeping mandatory only\n"); 5075 5076 link->conf->basic_rates = basic_rates; 5077 5078 /* cf. IEEE 802.11 9.2.12 */ 5079 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5080 have_higher_than_11mbit; 5081 5082 return 0; 5083 } 5084 5085 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5086 struct cfg80211_bss *cbss) 5087 { 5088 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5089 const struct element *ht_cap_elem, *vht_cap_elem; 5090 const struct cfg80211_bss_ies *ies; 5091 const struct ieee80211_ht_cap *ht_cap; 5092 const struct ieee80211_vht_cap *vht_cap; 5093 const struct ieee80211_he_cap_elem *he_cap; 5094 const struct element *he_cap_elem; 5095 u16 mcs_80_map, mcs_160_map; 5096 int i, mcs_nss_size; 5097 bool support_160; 5098 u8 chains = 1; 5099 5100 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5101 return chains; 5102 5103 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5104 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5105 ht_cap = (void *)ht_cap_elem->data; 5106 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5107 /* 5108 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5109 * "Tx Unequal Modulation Supported" fields. 5110 */ 5111 } 5112 5113 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5114 return chains; 5115 5116 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5117 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5118 u8 nss; 5119 u16 tx_mcs_map; 5120 5121 vht_cap = (void *)vht_cap_elem->data; 5122 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5123 for (nss = 8; nss > 0; nss--) { 5124 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5125 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5126 break; 5127 } 5128 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5129 chains = max(chains, nss); 5130 } 5131 5132 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5133 return chains; 5134 5135 ies = rcu_dereference(cbss->ies); 5136 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5137 ies->data, ies->len); 5138 5139 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5140 return chains; 5141 5142 /* skip one byte ext_tag_id */ 5143 he_cap = (void *)(he_cap_elem->data + 1); 5144 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5145 5146 /* invalid HE IE */ 5147 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5148 return chains; 5149 5150 /* mcs_nss is right after he_cap info */ 5151 he_mcs_nss_supp = (void *)(he_cap + 1); 5152 5153 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5154 5155 for (i = 7; i >= 0; i--) { 5156 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5157 5158 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5159 chains = max_t(u8, chains, i + 1); 5160 break; 5161 } 5162 } 5163 5164 support_160 = he_cap->phy_cap_info[0] & 5165 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5166 5167 if (!support_160) 5168 return chains; 5169 5170 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5171 for (i = 7; i >= 0; i--) { 5172 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5173 5174 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5175 chains = max_t(u8, chains, i + 1); 5176 break; 5177 } 5178 } 5179 5180 return chains; 5181 } 5182 5183 static void 5184 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5185 struct ieee80211_supported_band *sband, 5186 struct cfg80211_assoc_request *req, 5187 bool wmm_used, int link_id, 5188 struct ieee80211_conn_settings *conn) 5189 { 5190 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5191 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5192 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5193 const struct ieee80211_sta_he_cap *he_cap; 5194 const struct ieee80211_sta_eht_cap *eht_cap; 5195 struct ieee80211_sta_vht_cap vht_cap; 5196 5197 if (sband->band == NL80211_BAND_S1GHZ) { 5198 conn->mode = IEEE80211_CONN_MODE_S1G; 5199 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5200 mlme_dbg(sdata, "operating as S1G STA\n"); 5201 return; 5202 } 5203 5204 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5205 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5206 5207 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5208 5209 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5210 mlme_link_id_dbg(sdata, link_id, 5211 "HT disabled by flag, limiting to legacy\n"); 5212 goto out; 5213 } 5214 5215 if (!wmm_used) { 5216 mlme_link_id_dbg(sdata, link_id, 5217 "WMM/QoS not supported, limiting to legacy\n"); 5218 goto out; 5219 } 5220 5221 if (req) { 5222 unsigned int i; 5223 5224 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5225 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5226 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5227 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5228 netdev_info(sdata->dev, 5229 "WEP/TKIP use, limiting to legacy\n"); 5230 goto out; 5231 } 5232 } 5233 } 5234 5235 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5236 mlme_link_id_dbg(sdata, link_id, 5237 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5238 goto out; 5239 } 5240 5241 /* HT is fine */ 5242 conn->mode = IEEE80211_CONN_MODE_HT; 5243 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5244 IEEE80211_CONN_BW_LIMIT_40 : 5245 IEEE80211_CONN_BW_LIMIT_20; 5246 5247 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5248 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5249 5250 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5251 mlme_link_id_dbg(sdata, link_id, 5252 "VHT disabled by flag, limiting to HT\n"); 5253 goto out; 5254 } 5255 5256 if (vht_cap.vht_supported && is_5ghz) { 5257 bool have_80mhz = false; 5258 unsigned int i; 5259 5260 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5261 mlme_link_id_dbg(sdata, link_id, 5262 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5263 goto out; 5264 } 5265 5266 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5267 for (i = 0; i < sband->n_channels; i++) { 5268 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5269 IEEE80211_CHAN_NO_80MHZ)) 5270 continue; 5271 5272 have_80mhz = true; 5273 break; 5274 } 5275 5276 if (!have_80mhz) { 5277 mlme_link_id_dbg(sdata, link_id, 5278 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5279 goto out; 5280 } 5281 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5282 mlme_link_id_dbg(sdata, link_id, 5283 "no VHT support on 5 GHz, limiting to HT\n"); 5284 goto out; 5285 } 5286 5287 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5288 if (sband->band != NL80211_BAND_2GHZ) { 5289 conn->mode = IEEE80211_CONN_MODE_VHT; 5290 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5291 } 5292 5293 if (is_5ghz && 5294 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5295 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5296 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5297 mlme_link_id_dbg(sdata, link_id, 5298 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5299 } 5300 5301 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5302 mlme_link_id_dbg(sdata, link_id, 5303 "HE disabled by flag, limiting to HT/VHT\n"); 5304 goto out; 5305 } 5306 5307 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5308 if (!he_cap) { 5309 WARN_ON(is_6ghz); 5310 mlme_link_id_dbg(sdata, link_id, 5311 "no HE support, limiting to HT/VHT\n"); 5312 goto out; 5313 } 5314 5315 /* so we have HE */ 5316 conn->mode = IEEE80211_CONN_MODE_HE; 5317 5318 /* check bandwidth */ 5319 switch (sband->band) { 5320 default: 5321 case NL80211_BAND_2GHZ: 5322 if (he_cap->he_cap_elem.phy_cap_info[0] & 5323 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5324 break; 5325 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5326 mlme_link_id_dbg(sdata, link_id, 5327 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5328 break; 5329 case NL80211_BAND_5GHZ: 5330 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5331 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5332 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5333 mlme_link_id_dbg(sdata, link_id, 5334 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5335 break; 5336 } 5337 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5338 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5339 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5340 conn->bw_limit, 5341 IEEE80211_CONN_BW_LIMIT_80); 5342 mlme_link_id_dbg(sdata, link_id, 5343 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5344 } 5345 break; 5346 case NL80211_BAND_6GHZ: 5347 if (he_cap->he_cap_elem.phy_cap_info[0] & 5348 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5349 break; 5350 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5351 conn->bw_limit, 5352 IEEE80211_CONN_BW_LIMIT_80); 5353 mlme_link_id_dbg(sdata, link_id, 5354 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5355 break; 5356 } 5357 5358 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5359 mlme_link_id_dbg(sdata, link_id, 5360 "EHT disabled by flag, limiting to HE\n"); 5361 goto out; 5362 } 5363 5364 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5365 if (!eht_cap) { 5366 mlme_link_id_dbg(sdata, link_id, 5367 "no EHT support, limiting to HE\n"); 5368 goto out; 5369 } 5370 5371 /* we have EHT */ 5372 5373 conn->mode = IEEE80211_CONN_MODE_EHT; 5374 5375 /* check bandwidth */ 5376 if (is_6ghz && 5377 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5378 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5379 else if (is_6ghz) 5380 mlme_link_id_dbg(sdata, link_id, 5381 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5382 5383 out: 5384 mlme_link_id_dbg(sdata, link_id, 5385 "determined local STA to be %s, BW limited to %d MHz\n", 5386 ieee80211_conn_mode_str(conn->mode), 5387 20 * (1 << conn->bw_limit)); 5388 } 5389 5390 static void 5391 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5392 struct ieee80211_supported_band *sband, 5393 struct cfg80211_auth_request *req, 5394 bool wmm_used, 5395 struct ieee80211_conn_settings *conn) 5396 { 5397 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5398 req->link_id > 0 ? req->link_id : 0, 5399 conn); 5400 } 5401 5402 static void 5403 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5404 struct ieee80211_supported_band *sband, 5405 struct cfg80211_assoc_request *req, 5406 bool wmm_used, int link_id, 5407 struct ieee80211_conn_settings *conn) 5408 { 5409 struct ieee80211_conn_settings tmp; 5410 5411 WARN_ON(!req); 5412 5413 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5414 &tmp); 5415 5416 conn->mode = min_t(enum ieee80211_conn_mode, 5417 conn->mode, tmp.mode); 5418 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5419 conn->bw_limit, tmp.bw_limit); 5420 } 5421 5422 static enum ieee80211_ap_reg_power 5423 ieee80211_ap_power_type(u8 control) 5424 { 5425 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 5426 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 5427 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 5428 return IEEE80211_REG_LPI_AP; 5429 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 5430 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 5431 return IEEE80211_REG_SP_AP; 5432 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 5433 return IEEE80211_REG_VLP_AP; 5434 default: 5435 return IEEE80211_REG_UNSET_AP; 5436 } 5437 } 5438 5439 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5440 struct ieee80211_link_data *link, 5441 int link_id, 5442 struct cfg80211_bss *cbss, bool mlo, 5443 struct ieee80211_conn_settings *conn) 5444 { 5445 struct ieee80211_local *local = sdata->local; 5446 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5447 struct ieee80211_chan_req chanreq = {}; 5448 struct cfg80211_chan_def ap_chandef; 5449 struct ieee802_11_elems *elems; 5450 int ret; 5451 5452 lockdep_assert_wiphy(local->hw.wiphy); 5453 5454 rcu_read_lock(); 5455 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 5456 &chanreq, &ap_chandef); 5457 5458 if (IS_ERR(elems)) { 5459 rcu_read_unlock(); 5460 return PTR_ERR(elems); 5461 } 5462 5463 if (mlo && !elems->ml_basic) { 5464 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5465 rcu_read_unlock(); 5466 kfree(elems); 5467 return -EINVAL; 5468 } 5469 5470 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 5471 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 5472 5473 if (elems->pwr_constr_elem) 5474 link->conf->pwr_reduction = *elems->pwr_constr_elem; 5475 5476 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 5477 if (he_6ghz_oper) 5478 link->conf->power_type = 5479 ieee80211_ap_power_type(he_6ghz_oper->control); 5480 else 5481 link_info(link, 5482 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 5483 cbss->channel->center_freq); 5484 5485 link->conf->tpe = elems->tpe; 5486 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 5487 &chanreq.oper); 5488 } 5489 rcu_read_unlock(); 5490 /* the element data was RCU protected so no longer valid anyway */ 5491 kfree(elems); 5492 elems = NULL; 5493 5494 if (!link) 5495 return 0; 5496 5497 rcu_read_lock(); 5498 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 5499 local->rx_chains); 5500 rcu_read_unlock(); 5501 5502 /* 5503 * If this fails (possibly due to channel context sharing 5504 * on incompatible channels, e.g. 80+80 and 160 sharing the 5505 * same control channel) try to use a smaller bandwidth. 5506 */ 5507 ret = ieee80211_link_use_channel(link, &chanreq, 5508 IEEE80211_CHANCTX_SHARED); 5509 5510 /* don't downgrade for 5 and 10 MHz channels, though. */ 5511 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 5512 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 5513 return ret; 5514 5515 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 5516 ieee80211_chanreq_downgrade(&chanreq, conn); 5517 5518 ret = ieee80211_link_use_channel(link, &chanreq, 5519 IEEE80211_CHANCTX_SHARED); 5520 } 5521 5522 return ret; 5523 } 5524 5525 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5526 u8 *dtim_count, u8 *dtim_period) 5527 { 5528 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5529 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5530 ies->len); 5531 const struct ieee80211_tim_ie *tim = NULL; 5532 const struct ieee80211_bssid_index *idx; 5533 bool valid = tim_ie && tim_ie[1] >= 2; 5534 5535 if (valid) 5536 tim = (void *)(tim_ie + 2); 5537 5538 if (dtim_count) 5539 *dtim_count = valid ? tim->dtim_count : 0; 5540 5541 if (dtim_period) 5542 *dtim_period = valid ? tim->dtim_period : 0; 5543 5544 /* Check if value is overridden by non-transmitted profile */ 5545 if (!idx_ie || idx_ie[1] < 3) 5546 return valid; 5547 5548 idx = (void *)(idx_ie + 2); 5549 5550 if (dtim_count) 5551 *dtim_count = idx->dtim_count; 5552 5553 if (dtim_period) 5554 *dtim_period = idx->dtim_period; 5555 5556 return true; 5557 } 5558 5559 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5560 struct ieee80211_mgmt *mgmt, 5561 struct ieee802_11_elems *elems, 5562 const u8 *elem_start, unsigned int elem_len) 5563 { 5564 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5565 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5566 struct ieee80211_local *local = sdata->local; 5567 unsigned int link_id; 5568 struct sta_info *sta; 5569 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5570 u16 valid_links = 0, dormant_links = 0; 5571 int err; 5572 5573 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5574 /* 5575 * station info was already allocated and inserted before 5576 * the association and should be available to us 5577 */ 5578 sta = sta_info_get(sdata, assoc_data->ap_addr); 5579 if (WARN_ON(!sta)) 5580 goto out_err; 5581 5582 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 5583 5584 if (ieee80211_vif_is_mld(&sdata->vif)) { 5585 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5586 if (!assoc_data->link[link_id].bss) 5587 continue; 5588 5589 valid_links |= BIT(link_id); 5590 if (assoc_data->link[link_id].disabled) 5591 dormant_links |= BIT(link_id); 5592 5593 if (link_id != assoc_data->assoc_link_id) { 5594 err = ieee80211_sta_allocate_link(sta, link_id); 5595 if (err) 5596 goto out_err; 5597 } 5598 } 5599 5600 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5601 } 5602 5603 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5604 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5605 struct ieee80211_link_data *link; 5606 struct link_sta_info *link_sta; 5607 5608 if (!cbss) 5609 continue; 5610 5611 link = sdata_dereference(sdata->link[link_id], sdata); 5612 if (WARN_ON(!link)) 5613 goto out_err; 5614 5615 if (ieee80211_vif_is_mld(&sdata->vif)) 5616 link_info(link, 5617 "local address %pM, AP link address %pM%s\n", 5618 link->conf->addr, 5619 assoc_data->link[link_id].bss->bssid, 5620 link_id == assoc_data->assoc_link_id ? 5621 " (assoc)" : ""); 5622 5623 link_sta = rcu_dereference_protected(sta->link[link_id], 5624 lockdep_is_held(&local->hw.wiphy->mtx)); 5625 if (WARN_ON(!link_sta)) 5626 goto out_err; 5627 5628 if (!link->u.mgd.have_beacon) { 5629 const struct cfg80211_bss_ies *ies; 5630 5631 rcu_read_lock(); 5632 ies = rcu_dereference(cbss->beacon_ies); 5633 if (ies) 5634 link->u.mgd.have_beacon = true; 5635 else 5636 ies = rcu_dereference(cbss->ies); 5637 ieee80211_get_dtim(ies, 5638 &link->conf->sync_dtim_count, 5639 &link->u.mgd.dtim_period); 5640 link->conf->beacon_int = cbss->beacon_interval; 5641 rcu_read_unlock(); 5642 } 5643 5644 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5645 5646 if (link_id != assoc_data->assoc_link_id) { 5647 link->u.mgd.conn = assoc_data->link[link_id].conn; 5648 5649 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 5650 true, &link->u.mgd.conn); 5651 if (err) { 5652 link_info(link, "prep_channel failed\n"); 5653 goto out_err; 5654 } 5655 } 5656 5657 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5658 assoc_data->link[link_id].bss); 5659 if (err) 5660 goto out_err; 5661 5662 if (!ieee80211_assoc_config_link(link, link_sta, 5663 assoc_data->link[link_id].bss, 5664 mgmt, elem_start, elem_len, 5665 &changed[link_id])) 5666 goto out_err; 5667 5668 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5669 valid_links &= ~BIT(link_id); 5670 ieee80211_sta_remove_link(sta, link_id); 5671 continue; 5672 } 5673 5674 if (link_id != assoc_data->assoc_link_id) { 5675 err = ieee80211_sta_activate_link(sta, link_id); 5676 if (err) 5677 goto out_err; 5678 } 5679 } 5680 5681 /* links might have changed due to rejected ones, set them again */ 5682 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5683 5684 rate_control_rate_init(sta); 5685 5686 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5687 set_sta_flag(sta, WLAN_STA_MFP); 5688 sta->sta.mfp = true; 5689 } else { 5690 sta->sta.mfp = false; 5691 } 5692 5693 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5694 elems->ext_capab_len); 5695 5696 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5697 local->hw.queues >= IEEE80211_NUM_ACS; 5698 5699 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5700 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5701 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5702 if (err) { 5703 sdata_info(sdata, 5704 "failed to move station %pM to desired state\n", 5705 sta->sta.addr); 5706 WARN_ON(__sta_info_destroy(sta)); 5707 goto out_err; 5708 } 5709 5710 if (sdata->wdev.use_4addr) 5711 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5712 5713 ieee80211_set_associated(sdata, assoc_data, changed); 5714 5715 /* 5716 * If we're using 4-addr mode, let the AP know that we're 5717 * doing so, so that it can create the STA VLAN on its side 5718 */ 5719 if (ifmgd->use_4addr) 5720 ieee80211_send_4addr_nullfunc(local, sdata); 5721 5722 /* 5723 * Start timer to probe the connection to the AP now. 5724 * Also start the timer that will detect beacon loss. 5725 */ 5726 ieee80211_sta_reset_beacon_monitor(sdata); 5727 ieee80211_sta_reset_conn_monitor(sdata); 5728 5729 return true; 5730 out_err: 5731 eth_zero_addr(sdata->vif.cfg.ap_addr); 5732 return false; 5733 } 5734 5735 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5736 struct ieee80211_mgmt *mgmt, 5737 size_t len) 5738 { 5739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5740 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5741 u16 capab_info, status_code, aid; 5742 struct ieee80211_elems_parse_params parse_params = { 5743 .bss = NULL, 5744 .link_id = -1, 5745 .from_ap = true, 5746 }; 5747 struct ieee802_11_elems *elems; 5748 int ac; 5749 const u8 *elem_start; 5750 unsigned int elem_len; 5751 bool reassoc; 5752 struct ieee80211_event event = { 5753 .type = MLME_EVENT, 5754 .u.mlme.data = ASSOC_EVENT, 5755 }; 5756 struct ieee80211_prep_tx_info info = {}; 5757 struct cfg80211_rx_assoc_resp_data resp = { 5758 .uapsd_queues = -1, 5759 }; 5760 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5761 unsigned int link_id; 5762 5763 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5764 5765 if (!assoc_data) 5766 return; 5767 5768 parse_params.mode = 5769 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 5770 5771 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5772 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5773 return; 5774 5775 /* 5776 * AssocResp and ReassocResp have identical structure, so process both 5777 * of them in this function. 5778 */ 5779 5780 if (len < 24 + 6) 5781 return; 5782 5783 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5784 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5785 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5786 if (assoc_data->s1g) 5787 elem_start = mgmt->u.s1g_assoc_resp.variable; 5788 else 5789 elem_start = mgmt->u.assoc_resp.variable; 5790 5791 /* 5792 * Note: this may not be perfect, AP might misbehave - if 5793 * anyone needs to rely on perfect complete notification 5794 * with the exact right subtype, then we need to track what 5795 * we actually transmitted. 5796 */ 5797 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5798 IEEE80211_STYPE_ASSOC_REQ; 5799 5800 if (assoc_data->fils_kek_len && 5801 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5802 return; 5803 5804 elem_len = len - (elem_start - (u8 *)mgmt); 5805 parse_params.start = elem_start; 5806 parse_params.len = elem_len; 5807 elems = ieee802_11_parse_elems_full(&parse_params); 5808 if (!elems) 5809 goto notify_driver; 5810 5811 if (elems->aid_resp) 5812 aid = le16_to_cpu(elems->aid_resp->aid); 5813 else if (assoc_data->s1g) 5814 aid = 0; /* TODO */ 5815 else 5816 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5817 5818 /* 5819 * The 5 MSB of the AID field are reserved 5820 * (802.11-2016 9.4.1.8 AID field) 5821 */ 5822 aid &= 0x7ff; 5823 5824 sdata_info(sdata, 5825 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5826 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5827 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5828 5829 ifmgd->broken_ap = false; 5830 5831 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5832 elems->timeout_int && 5833 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5834 u32 tu, ms; 5835 5836 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5837 le32_to_cpu(elems->timeout_int->value)); 5838 5839 tu = le32_to_cpu(elems->timeout_int->value); 5840 ms = tu * 1024 / 1000; 5841 sdata_info(sdata, 5842 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5843 assoc_data->ap_addr, tu, ms); 5844 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5845 assoc_data->timeout_started = true; 5846 assoc_data->comeback = true; 5847 if (ms > IEEE80211_ASSOC_TIMEOUT) 5848 run_again(sdata, assoc_data->timeout); 5849 goto notify_driver; 5850 } 5851 5852 if (status_code != WLAN_STATUS_SUCCESS) { 5853 sdata_info(sdata, "%pM denied association (code=%d)\n", 5854 assoc_data->ap_addr, status_code); 5855 event.u.mlme.status = MLME_DENIED; 5856 event.u.mlme.reason = status_code; 5857 drv_event_callback(sdata->local, sdata, &event); 5858 } else { 5859 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5860 sdata_info(sdata, 5861 "invalid AID value %d (out of range), turn off PS\n", 5862 aid); 5863 aid = 0; 5864 ifmgd->broken_ap = true; 5865 } 5866 5867 if (ieee80211_vif_is_mld(&sdata->vif)) { 5868 struct ieee80211_mle_basic_common_info *common; 5869 5870 if (!elems->ml_basic) { 5871 sdata_info(sdata, 5872 "MLO association with %pM but no (basic) multi-link element in response!\n", 5873 assoc_data->ap_addr); 5874 goto abandon_assoc; 5875 } 5876 5877 common = (void *)elems->ml_basic->variable; 5878 5879 if (memcmp(assoc_data->ap_addr, 5880 common->mld_mac_addr, ETH_ALEN)) { 5881 sdata_info(sdata, 5882 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5883 common->mld_mac_addr, 5884 assoc_data->ap_addr); 5885 goto abandon_assoc; 5886 } 5887 5888 sdata->vif.cfg.eml_cap = 5889 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 5890 sdata->vif.cfg.eml_med_sync_delay = 5891 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 5892 sdata->vif.cfg.mld_capa_op = 5893 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 5894 } 5895 5896 sdata->vif.cfg.aid = aid; 5897 5898 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5899 elem_start, elem_len)) { 5900 /* oops -- internal error -- send timeout for now */ 5901 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5902 goto notify_driver; 5903 } 5904 event.u.mlme.status = MLME_SUCCESS; 5905 drv_event_callback(sdata->local, sdata, &event); 5906 sdata_info(sdata, "associated\n"); 5907 5908 info.success = 1; 5909 } 5910 5911 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5912 struct ieee80211_link_data *link; 5913 5914 if (!assoc_data->link[link_id].bss) 5915 continue; 5916 5917 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5918 ether_addr_copy(resp.links[link_id].addr, 5919 assoc_data->link[link_id].addr); 5920 resp.links[link_id].status = assoc_data->link[link_id].status; 5921 5922 link = sdata_dereference(sdata->link[link_id], sdata); 5923 if (!link) 5924 continue; 5925 5926 /* get uapsd queues configuration - same for all links */ 5927 resp.uapsd_queues = 0; 5928 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5929 if (link->tx_conf[ac].uapsd) 5930 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5931 } 5932 5933 if (ieee80211_vif_is_mld(&sdata->vif)) { 5934 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5935 resp.ap_mld_addr = ap_mld_addr; 5936 } 5937 5938 ieee80211_destroy_assoc_data(sdata, 5939 status_code == WLAN_STATUS_SUCCESS ? 5940 ASSOC_SUCCESS : 5941 ASSOC_REJECTED); 5942 5943 resp.buf = (u8 *)mgmt; 5944 resp.len = len; 5945 resp.req_ies = ifmgd->assoc_req_ies; 5946 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5947 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5948 notify_driver: 5949 drv_mgd_complete_tx(sdata->local, sdata, &info); 5950 kfree(elems); 5951 return; 5952 abandon_assoc: 5953 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5954 goto notify_driver; 5955 } 5956 5957 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5958 struct ieee80211_mgmt *mgmt, size_t len, 5959 struct ieee80211_rx_status *rx_status) 5960 { 5961 struct ieee80211_sub_if_data *sdata = link->sdata; 5962 struct ieee80211_local *local = sdata->local; 5963 struct ieee80211_bss *bss; 5964 struct ieee80211_channel *channel; 5965 5966 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5967 5968 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5969 ieee80211_rx_status_to_khz(rx_status)); 5970 if (!channel) 5971 return; 5972 5973 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5974 if (bss) { 5975 link->conf->beacon_rate = bss->beacon_rate; 5976 ieee80211_rx_bss_put(local, bss); 5977 } 5978 } 5979 5980 5981 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5982 struct sk_buff *skb) 5983 { 5984 struct ieee80211_sub_if_data *sdata = link->sdata; 5985 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5986 struct ieee80211_if_managed *ifmgd; 5987 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5988 struct ieee80211_channel *channel; 5989 size_t baselen, len = skb->len; 5990 5991 ifmgd = &sdata->u.mgd; 5992 5993 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5994 5995 /* 5996 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5997 * "If a 6 GHz AP receives a Probe Request frame and responds with 5998 * a Probe Response frame [..], the Address 1 field of the Probe 5999 * Response frame shall be set to the broadcast address [..]" 6000 * So, on 6GHz band we should also accept broadcast responses. 6001 */ 6002 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 6003 rx_status->freq); 6004 if (!channel) 6005 return; 6006 6007 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6008 (channel->band != NL80211_BAND_6GHZ || 6009 !is_broadcast_ether_addr(mgmt->da))) 6010 return; /* ignore ProbeResp to foreign address */ 6011 6012 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6013 if (baselen > len) 6014 return; 6015 6016 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6017 6018 if (ifmgd->associated && 6019 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6020 ieee80211_reset_ap_probe(sdata); 6021 } 6022 6023 /* 6024 * This is the canonical list of information elements we care about, 6025 * the filter code also gives us all changes to the Microsoft OUI 6026 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6027 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6028 * changes to requested client power. 6029 * 6030 * We implement beacon filtering in software since that means we can 6031 * avoid processing the frame here and in cfg80211, and userspace 6032 * will not be able to tell whether the hardware supports it or not. 6033 * 6034 * XXX: This list needs to be dynamic -- userspace needs to be able to 6035 * add items it requires. It also needs to be able to tell us to 6036 * look out for other vendor IEs. 6037 */ 6038 static const u64 care_about_ies = 6039 (1ULL << WLAN_EID_COUNTRY) | 6040 (1ULL << WLAN_EID_ERP_INFO) | 6041 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6042 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6043 (1ULL << WLAN_EID_HT_CAPABILITY) | 6044 (1ULL << WLAN_EID_HT_OPERATION) | 6045 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6046 6047 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6048 struct ieee80211_if_managed *ifmgd, 6049 struct ieee80211_bss_conf *bss_conf, 6050 struct ieee80211_local *local, 6051 struct ieee80211_rx_status *rx_status) 6052 { 6053 struct ieee80211_sub_if_data *sdata = link->sdata; 6054 6055 /* Track average RSSI from the Beacon frames of the current AP */ 6056 6057 if (!link->u.mgd.tracking_signal_avg) { 6058 link->u.mgd.tracking_signal_avg = true; 6059 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6060 link->u.mgd.last_cqm_event_signal = 0; 6061 link->u.mgd.count_beacon_signal = 1; 6062 link->u.mgd.last_ave_beacon_signal = 0; 6063 } else { 6064 link->u.mgd.count_beacon_signal++; 6065 } 6066 6067 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6068 -rx_status->signal); 6069 6070 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6071 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6072 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6073 int last_sig = link->u.mgd.last_ave_beacon_signal; 6074 struct ieee80211_event event = { 6075 .type = RSSI_EVENT, 6076 }; 6077 6078 /* 6079 * if signal crosses either of the boundaries, invoke callback 6080 * with appropriate parameters 6081 */ 6082 if (sig > ifmgd->rssi_max_thold && 6083 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6084 link->u.mgd.last_ave_beacon_signal = sig; 6085 event.u.rssi.data = RSSI_EVENT_HIGH; 6086 drv_event_callback(local, sdata, &event); 6087 } else if (sig < ifmgd->rssi_min_thold && 6088 (last_sig >= ifmgd->rssi_max_thold || 6089 last_sig == 0)) { 6090 link->u.mgd.last_ave_beacon_signal = sig; 6091 event.u.rssi.data = RSSI_EVENT_LOW; 6092 drv_event_callback(local, sdata, &event); 6093 } 6094 } 6095 6096 if (bss_conf->cqm_rssi_thold && 6097 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6098 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6099 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6100 int last_event = link->u.mgd.last_cqm_event_signal; 6101 int thold = bss_conf->cqm_rssi_thold; 6102 int hyst = bss_conf->cqm_rssi_hyst; 6103 6104 if (sig < thold && 6105 (last_event == 0 || sig < last_event - hyst)) { 6106 link->u.mgd.last_cqm_event_signal = sig; 6107 ieee80211_cqm_rssi_notify( 6108 &sdata->vif, 6109 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6110 sig, GFP_KERNEL); 6111 } else if (sig > thold && 6112 (last_event == 0 || sig > last_event + hyst)) { 6113 link->u.mgd.last_cqm_event_signal = sig; 6114 ieee80211_cqm_rssi_notify( 6115 &sdata->vif, 6116 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6117 sig, GFP_KERNEL); 6118 } 6119 } 6120 6121 if (bss_conf->cqm_rssi_low && 6122 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6123 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6124 int last_event = link->u.mgd.last_cqm_event_signal; 6125 int low = bss_conf->cqm_rssi_low; 6126 int high = bss_conf->cqm_rssi_high; 6127 6128 if (sig < low && 6129 (last_event == 0 || last_event >= low)) { 6130 link->u.mgd.last_cqm_event_signal = sig; 6131 ieee80211_cqm_rssi_notify( 6132 &sdata->vif, 6133 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6134 sig, GFP_KERNEL); 6135 } else if (sig > high && 6136 (last_event == 0 || last_event <= high)) { 6137 link->u.mgd.last_cqm_event_signal = sig; 6138 ieee80211_cqm_rssi_notify( 6139 &sdata->vif, 6140 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6141 sig, GFP_KERNEL); 6142 } 6143 } 6144 } 6145 6146 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6147 struct cfg80211_bss *bss) 6148 { 6149 if (ether_addr_equal(tx_bssid, bss->bssid)) 6150 return true; 6151 if (!bss->transmitted_bss) 6152 return false; 6153 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6154 } 6155 6156 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6157 struct wiphy_work *work) 6158 { 6159 struct ieee80211_sub_if_data *sdata = 6160 container_of(work, struct ieee80211_sub_if_data, 6161 u.mgd.ml_reconf_work.work); 6162 u16 new_valid_links, new_active_links, new_dormant_links; 6163 int ret; 6164 6165 if (!sdata->u.mgd.removed_links) 6166 return; 6167 6168 sdata_info(sdata, 6169 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6170 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6171 6172 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6173 if (new_valid_links == sdata->vif.valid_links) 6174 return; 6175 6176 if (!new_valid_links || 6177 !(new_valid_links & ~sdata->vif.dormant_links)) { 6178 sdata_info(sdata, "No valid links after reconfiguration\n"); 6179 ret = -EINVAL; 6180 goto out; 6181 } 6182 6183 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6184 if (new_active_links != sdata->vif.active_links) { 6185 if (!new_active_links) 6186 new_active_links = 6187 BIT(ffs(new_valid_links & 6188 ~sdata->vif.dormant_links) - 1); 6189 6190 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6191 if (ret) { 6192 sdata_info(sdata, 6193 "Failed setting active links\n"); 6194 goto out; 6195 } 6196 } 6197 6198 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6199 6200 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6201 new_dormant_links); 6202 if (ret) 6203 sdata_info(sdata, "Failed setting valid links\n"); 6204 6205 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6206 6207 out: 6208 if (!ret) 6209 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6210 else 6211 __ieee80211_disconnect(sdata); 6212 6213 sdata->u.mgd.removed_links = 0; 6214 } 6215 6216 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6217 struct ieee802_11_elems *elems) 6218 { 6219 const struct element *sub; 6220 unsigned long removed_links = 0; 6221 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6222 u8 link_id; 6223 u32 delay; 6224 6225 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6226 return; 6227 6228 /* Directly parse the sub elements as the common information doesn't 6229 * hold any useful information. 6230 */ 6231 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6232 elems->ml_reconf_len) { 6233 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6234 u8 *pos = prof->variable; 6235 u16 control; 6236 6237 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6238 continue; 6239 6240 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6241 sub->datalen)) 6242 return; 6243 6244 control = le16_to_cpu(prof->control); 6245 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6246 6247 removed_links |= BIT(link_id); 6248 6249 /* the MAC address should not be included, but handle it */ 6250 if (control & 6251 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6252 pos += 6; 6253 6254 /* According to Draft P802.11be_D3.0, the control should 6255 * include the AP Removal Timer present. If the AP Removal Timer 6256 * is not present assume immediate removal. 6257 */ 6258 if (control & 6259 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6260 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6261 } 6262 6263 removed_links &= sdata->vif.valid_links; 6264 if (!removed_links) { 6265 /* In case the removal was cancelled, abort it */ 6266 if (sdata->u.mgd.removed_links) { 6267 sdata->u.mgd.removed_links = 0; 6268 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6269 &sdata->u.mgd.ml_reconf_work); 6270 } 6271 return; 6272 } 6273 6274 delay = 0; 6275 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6276 struct ieee80211_bss_conf *link_conf = 6277 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6278 u32 link_delay; 6279 6280 if (!link_conf) { 6281 removed_links &= ~BIT(link_id); 6282 continue; 6283 } 6284 6285 if (link_removal_timeout[link_id] < 1) 6286 link_delay = 0; 6287 else 6288 link_delay = link_conf->beacon_int * 6289 (link_removal_timeout[link_id] - 1); 6290 6291 if (!delay) 6292 delay = link_delay; 6293 else 6294 delay = min(delay, link_delay); 6295 } 6296 6297 sdata->u.mgd.removed_links = removed_links; 6298 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6299 &sdata->u.mgd.ml_reconf_work, 6300 TU_TO_JIFFIES(delay)); 6301 } 6302 6303 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6304 u16 active_links, u16 dormant_links, 6305 u16 suspended_links) 6306 { 6307 u64 changed = 0; 6308 int ret; 6309 6310 if (!active_links) { 6311 ret = -EINVAL; 6312 goto out; 6313 } 6314 6315 /* If there is an active negotiated TTLM, it should be discarded by 6316 * the new negotiated/advertised TTLM. 6317 */ 6318 if (sdata->vif.neg_ttlm.valid) { 6319 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6320 sdata->vif.suspended_links = 0; 6321 changed = BSS_CHANGED_MLD_TTLM; 6322 } 6323 6324 if (sdata->vif.active_links != active_links) { 6325 /* usable links are affected when active_links are changed, 6326 * so notify the driver about the status change 6327 */ 6328 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6329 active_links &= sdata->vif.active_links; 6330 if (!active_links) 6331 active_links = 6332 BIT(__ffs(sdata->vif.valid_links & 6333 ~dormant_links)); 6334 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6335 if (ret) { 6336 sdata_info(sdata, "Failed to set TTLM active links\n"); 6337 goto out; 6338 } 6339 } 6340 6341 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6342 dormant_links); 6343 if (ret) { 6344 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6345 goto out; 6346 } 6347 6348 sdata->vif.suspended_links = suspended_links; 6349 if (sdata->vif.suspended_links) 6350 changed |= BSS_CHANGED_MLD_TTLM; 6351 6352 ieee80211_vif_cfg_change_notify(sdata, changed); 6353 6354 out: 6355 if (ret) 6356 ieee80211_disconnect(&sdata->vif, false); 6357 6358 return ret; 6359 } 6360 6361 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6362 struct wiphy_work *work) 6363 { 6364 u16 new_active_links, new_dormant_links; 6365 struct ieee80211_sub_if_data *sdata = 6366 container_of(work, struct ieee80211_sub_if_data, 6367 u.mgd.ttlm_work.work); 6368 6369 new_active_links = sdata->u.mgd.ttlm_info.map & 6370 sdata->vif.valid_links; 6371 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6372 sdata->vif.valid_links; 6373 6374 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6375 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6376 0)) 6377 return; 6378 6379 sdata->u.mgd.ttlm_info.active = true; 6380 sdata->u.mgd.ttlm_info.switch_time = 0; 6381 } 6382 6383 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6384 { 6385 if (bm_size == 1) 6386 return *data; 6387 else 6388 return get_unaligned_le16(data); 6389 } 6390 6391 static int 6392 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6393 const struct ieee80211_ttlm_elem *ttlm, 6394 struct ieee80211_adv_ttlm_info *ttlm_info) 6395 { 6396 /* The element size was already validated in 6397 * ieee80211_tid_to_link_map_size_ok() 6398 */ 6399 u8 control, link_map_presence, map_size, tid; 6400 u8 *pos; 6401 6402 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6403 pos = (void *)ttlm->optional; 6404 control = ttlm->control; 6405 6406 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 6407 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 6408 return 0; 6409 6410 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6411 IEEE80211_TTLM_DIRECTION_BOTH) { 6412 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6413 return -EINVAL; 6414 } 6415 6416 link_map_presence = *pos; 6417 pos++; 6418 6419 ttlm_info->switch_time = get_unaligned_le16(pos); 6420 6421 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 6422 * by 1. 6423 */ 6424 if (!ttlm_info->switch_time) 6425 ttlm_info->switch_time = 1; 6426 6427 pos += 2; 6428 6429 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6430 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6431 pos += 3; 6432 } 6433 6434 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6435 map_size = 1; 6436 else 6437 map_size = 2; 6438 6439 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6440 * not advertise a TID-to-link mapping that does not map all TIDs to the 6441 * same link set, reject frame if not all links have mapping 6442 */ 6443 if (link_map_presence != 0xff) { 6444 sdata_info(sdata, 6445 "Invalid advertised T2L mapping presence indicator\n"); 6446 return -EINVAL; 6447 } 6448 6449 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6450 if (!ttlm_info->map) { 6451 sdata_info(sdata, 6452 "Invalid advertised T2L map for TID 0\n"); 6453 return -EINVAL; 6454 } 6455 6456 pos += map_size; 6457 6458 for (tid = 1; tid < 8; tid++) { 6459 u16 map = ieee80211_get_ttlm(map_size, pos); 6460 6461 if (map != ttlm_info->map) { 6462 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6463 tid); 6464 return -EINVAL; 6465 } 6466 6467 pos += map_size; 6468 } 6469 return 0; 6470 } 6471 6472 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6473 struct ieee802_11_elems *elems, 6474 u64 beacon_ts) 6475 { 6476 u8 i; 6477 int ret; 6478 6479 if (!ieee80211_vif_is_mld(&sdata->vif)) 6480 return; 6481 6482 if (!elems->ttlm_num) { 6483 if (sdata->u.mgd.ttlm_info.switch_time) { 6484 /* if a planned TID-to-link mapping was cancelled - 6485 * abort it 6486 */ 6487 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6488 &sdata->u.mgd.ttlm_work); 6489 } else if (sdata->u.mgd.ttlm_info.active) { 6490 /* if no TID-to-link element, set to default mapping in 6491 * which all TIDs are mapped to all setup links 6492 */ 6493 ret = ieee80211_vif_set_links(sdata, 6494 sdata->vif.valid_links, 6495 0); 6496 if (ret) { 6497 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6498 return; 6499 } 6500 ieee80211_vif_cfg_change_notify(sdata, 6501 BSS_CHANGED_MLD_VALID_LINKS); 6502 } 6503 memset(&sdata->u.mgd.ttlm_info, 0, 6504 sizeof(sdata->u.mgd.ttlm_info)); 6505 return; 6506 } 6507 6508 for (i = 0; i < elems->ttlm_num; i++) { 6509 struct ieee80211_adv_ttlm_info ttlm_info; 6510 u32 res; 6511 6512 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6513 &ttlm_info); 6514 6515 if (res) { 6516 __ieee80211_disconnect(sdata); 6517 return; 6518 } 6519 6520 if (ttlm_info.switch_time) { 6521 u16 beacon_ts_tu, st_tu, delay; 6522 u32 delay_jiffies; 6523 u64 mask; 6524 6525 /* The t2l map switch time is indicated with a partial 6526 * TSF value (bits 10 to 25), get the partial beacon TS 6527 * as well, and calc the delay to the start time. 6528 */ 6529 mask = GENMASK_ULL(25, 10); 6530 beacon_ts_tu = (beacon_ts & mask) >> 10; 6531 st_tu = ttlm_info.switch_time; 6532 delay = st_tu - beacon_ts_tu; 6533 6534 /* 6535 * If the switch time is far in the future, then it 6536 * could also be the previous switch still being 6537 * announced. 6538 * We can simply ignore it for now, if it is a future 6539 * switch the AP will continue to announce it anyway. 6540 */ 6541 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 6542 return; 6543 6544 delay_jiffies = TU_TO_JIFFIES(delay); 6545 6546 /* Link switching can take time, so schedule it 6547 * 100ms before to be ready on time 6548 */ 6549 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 6550 delay_jiffies -= 6551 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 6552 else 6553 delay_jiffies = 0; 6554 6555 sdata->u.mgd.ttlm_info = ttlm_info; 6556 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6557 &sdata->u.mgd.ttlm_work); 6558 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6559 &sdata->u.mgd.ttlm_work, 6560 delay_jiffies); 6561 return; 6562 } 6563 } 6564 } 6565 6566 static void 6567 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 6568 int reporting_link_id, 6569 struct ieee802_11_elems *elems) 6570 { 6571 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6572 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6573 const struct element *sub; 6574 const u8 *subelems; 6575 size_t subelems_len; 6576 u8 common_size; 6577 int link_id; 6578 6579 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 6580 return; 6581 6582 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 6583 subelems = (u8 *)elems->ml_basic + common_size; 6584 subelems_len = elems->ml_basic_len - common_size; 6585 6586 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 6587 subelems, subelems_len) { 6588 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6589 struct ieee80211_link_data *link; 6590 ssize_t len; 6591 6592 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 6593 sub->datalen)) 6594 continue; 6595 6596 link_id = le16_get_bits(prof->control, 6597 IEEE80211_MLE_STA_CONTROL_LINK_ID); 6598 /* need a valid link ID, but also not our own, both AP bugs */ 6599 if (link_id == reporting_link_id || 6600 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 6601 continue; 6602 6603 link = sdata_dereference(sdata->link[link_id], sdata); 6604 if (!link) 6605 continue; 6606 6607 len = cfg80211_defragment_element(sub, subelems, subelems_len, 6608 NULL, 0, 6609 IEEE80211_MLE_SUBELEM_FRAGMENT); 6610 if (WARN_ON(len < 0)) 6611 continue; 6612 6613 sta_profiles[link_id] = sub; 6614 sta_profiles_len[link_id] = len; 6615 } 6616 6617 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6618 struct ieee80211_mle_per_sta_profile *prof; 6619 struct ieee802_11_elems *prof_elems; 6620 struct ieee80211_link_data *link; 6621 ssize_t len; 6622 6623 if (link_id == reporting_link_id) 6624 continue; 6625 6626 link = sdata_dereference(sdata->link[link_id], sdata); 6627 if (!link) 6628 continue; 6629 6630 if (!sta_profiles[link_id]) { 6631 prof_elems = NULL; 6632 goto handle; 6633 } 6634 6635 /* we can defragment in-place, won't use the buffer again */ 6636 len = cfg80211_defragment_element(sta_profiles[link_id], 6637 subelems, subelems_len, 6638 (void *)sta_profiles[link_id], 6639 sta_profiles_len[link_id], 6640 IEEE80211_MLE_SUBELEM_FRAGMENT); 6641 if (WARN_ON(len != sta_profiles_len[link_id])) 6642 continue; 6643 6644 prof = (void *)sta_profiles[link_id]; 6645 prof_elems = ieee802_11_parse_elems(prof->variable + 6646 (prof->sta_info_len - 1), 6647 len - 6648 (prof->sta_info_len - 1), 6649 false, NULL); 6650 6651 /* memory allocation failed - let's hope that's transient */ 6652 if (!prof_elems) 6653 continue; 6654 6655 handle: 6656 /* 6657 * FIXME: the timings here are obviously incorrect, 6658 * but only older Intel drivers seem to care, and 6659 * those don't have MLO. If you really need this, 6660 * the problem is having to calculate it with the 6661 * TSF offset etc. The device_timestamp is still 6662 * correct, of course. 6663 */ 6664 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 6665 IEEE80211_CSA_SOURCE_OTHER_LINK); 6666 kfree(prof_elems); 6667 } 6668 } 6669 6670 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 6671 const struct ieee802_11_elems *elems) 6672 { 6673 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 6674 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 6675 6676 if (!elems->ssid) 6677 return false; 6678 6679 /* hidden SSID: zero length */ 6680 if (elems->ssid_len == 0) 6681 return false; 6682 6683 if (elems->ssid_len != cfg->ssid_len) 6684 return true; 6685 6686 /* hidden SSID: zeroed out */ 6687 if (memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 6688 return false; 6689 6690 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 6691 } 6692 6693 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 6694 struct ieee80211_hdr *hdr, size_t len, 6695 struct ieee80211_rx_status *rx_status) 6696 { 6697 struct ieee80211_sub_if_data *sdata = link->sdata; 6698 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6699 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 6700 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6701 struct ieee80211_mgmt *mgmt = (void *) hdr; 6702 size_t baselen; 6703 struct ieee802_11_elems *elems; 6704 struct ieee80211_local *local = sdata->local; 6705 struct ieee80211_chanctx_conf *chanctx_conf; 6706 struct ieee80211_supported_band *sband; 6707 struct ieee80211_channel *chan; 6708 struct link_sta_info *link_sta; 6709 struct sta_info *sta; 6710 u64 changed = 0; 6711 bool erp_valid; 6712 u8 erp_value = 0; 6713 u32 ncrc = 0; 6714 u8 *bssid, *variable = mgmt->u.beacon.variable; 6715 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6716 struct ieee80211_elems_parse_params parse_params = { 6717 .mode = link->u.mgd.conn.mode, 6718 .link_id = -1, 6719 .from_ap = true, 6720 }; 6721 6722 lockdep_assert_wiphy(local->hw.wiphy); 6723 6724 /* Process beacon from the current BSS */ 6725 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 6726 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 6727 struct ieee80211_ext *ext = (void *) mgmt; 6728 6729 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 6730 variable = ext->u.s1g_short_beacon.variable; 6731 else 6732 variable = ext->u.s1g_beacon.variable; 6733 } 6734 6735 baselen = (u8 *) variable - (u8 *) mgmt; 6736 if (baselen > len) 6737 return; 6738 6739 parse_params.start = variable; 6740 parse_params.len = len - baselen; 6741 6742 rcu_read_lock(); 6743 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 6744 if (!chanctx_conf) { 6745 rcu_read_unlock(); 6746 return; 6747 } 6748 6749 if (ieee80211_rx_status_to_khz(rx_status) != 6750 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 6751 rcu_read_unlock(); 6752 return; 6753 } 6754 chan = chanctx_conf->def.chan; 6755 rcu_read_unlock(); 6756 6757 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 6758 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 6759 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 6760 parse_params.bss = ifmgd->assoc_data->link[0].bss; 6761 elems = ieee802_11_parse_elems_full(&parse_params); 6762 if (!elems) 6763 return; 6764 6765 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6766 6767 if (elems->dtim_period) 6768 link->u.mgd.dtim_period = elems->dtim_period; 6769 link->u.mgd.have_beacon = true; 6770 ifmgd->assoc_data->need_beacon = false; 6771 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6772 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6773 link->conf->sync_tsf = 6774 le64_to_cpu(mgmt->u.beacon.timestamp); 6775 link->conf->sync_device_ts = 6776 rx_status->device_timestamp; 6777 link->conf->sync_dtim_count = elems->dtim_count; 6778 } 6779 6780 if (elems->mbssid_config_ie) 6781 bss_conf->profile_periodicity = 6782 elems->mbssid_config_ie->profile_periodicity; 6783 else 6784 bss_conf->profile_periodicity = 0; 6785 6786 if (elems->ext_capab_len >= 11 && 6787 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6788 bss_conf->ema_ap = true; 6789 else 6790 bss_conf->ema_ap = false; 6791 6792 /* continue assoc process */ 6793 ifmgd->assoc_data->timeout = jiffies; 6794 ifmgd->assoc_data->timeout_started = true; 6795 run_again(sdata, ifmgd->assoc_data->timeout); 6796 kfree(elems); 6797 return; 6798 } 6799 6800 if (!ifmgd->associated || 6801 !ieee80211_rx_our_beacon(bssid, link->conf->bss)) 6802 return; 6803 bssid = link->u.mgd.bssid; 6804 6805 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 6806 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 6807 local, rx_status); 6808 6809 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 6810 mlme_dbg_ratelimited(sdata, 6811 "cancelling AP probe due to a received beacon\n"); 6812 ieee80211_reset_ap_probe(sdata); 6813 } 6814 6815 /* 6816 * Push the beacon loss detection into the future since 6817 * we are processing a beacon from the AP just now. 6818 */ 6819 ieee80211_sta_reset_beacon_monitor(sdata); 6820 6821 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 6822 * element (which carries the beacon interval). Don't forget to add a 6823 * bit to care_about_ies[] above if mac80211 is interested in a 6824 * changing S1G element. 6825 */ 6826 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6827 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 6828 parse_params.bss = link->conf->bss; 6829 parse_params.filter = care_about_ies; 6830 parse_params.crc = ncrc; 6831 elems = ieee802_11_parse_elems_full(&parse_params); 6832 if (!elems) 6833 return; 6834 6835 if (rx_status->flag & RX_FLAG_DECRYPTED && 6836 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 6837 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 6838 sdata->vif.cfg.ap_addr); 6839 __ieee80211_disconnect(sdata); 6840 return; 6841 } 6842 6843 ncrc = elems->crc; 6844 6845 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 6846 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 6847 if (local->hw.conf.dynamic_ps_timeout > 0) { 6848 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 6849 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 6850 ieee80211_hw_config(local, 6851 IEEE80211_CONF_CHANGE_PS); 6852 } 6853 ieee80211_send_nullfunc(local, sdata, false); 6854 } else if (!local->pspolling && sdata->u.mgd.powersave) { 6855 local->pspolling = true; 6856 6857 /* 6858 * Here is assumed that the driver will be 6859 * able to send ps-poll frame and receive a 6860 * response even though power save mode is 6861 * enabled, but some drivers might require 6862 * to disable power save here. This needs 6863 * to be investigated. 6864 */ 6865 ieee80211_send_pspoll(local, sdata); 6866 } 6867 } 6868 6869 if (sdata->vif.p2p || 6870 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 6871 struct ieee80211_p2p_noa_attr noa = {}; 6872 int ret; 6873 6874 ret = cfg80211_get_p2p_attr(variable, 6875 len - baselen, 6876 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 6877 (u8 *) &noa, sizeof(noa)); 6878 if (ret >= 2) { 6879 if (link->u.mgd.p2p_noa_index != noa.index) { 6880 /* valid noa_attr and index changed */ 6881 link->u.mgd.p2p_noa_index = noa.index; 6882 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 6883 changed |= BSS_CHANGED_P2P_PS; 6884 /* 6885 * make sure we update all information, the CRC 6886 * mechanism doesn't look at P2P attributes. 6887 */ 6888 link->u.mgd.beacon_crc_valid = false; 6889 } 6890 } else if (link->u.mgd.p2p_noa_index != -1) { 6891 /* noa_attr not found and we had valid noa_attr before */ 6892 link->u.mgd.p2p_noa_index = -1; 6893 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 6894 changed |= BSS_CHANGED_P2P_PS; 6895 link->u.mgd.beacon_crc_valid = false; 6896 } 6897 } 6898 6899 /* 6900 * Update beacon timing and dtim count on every beacon appearance. This 6901 * will allow the driver to use the most updated values. Do it before 6902 * comparing this one with last received beacon. 6903 * IMPORTANT: These parameters would possibly be out of sync by the time 6904 * the driver will use them. The synchronized view is currently 6905 * guaranteed only in certain callbacks. 6906 */ 6907 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6908 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6909 link->conf->sync_tsf = 6910 le64_to_cpu(mgmt->u.beacon.timestamp); 6911 link->conf->sync_device_ts = 6912 rx_status->device_timestamp; 6913 link->conf->sync_dtim_count = elems->dtim_count; 6914 } 6915 6916 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 6917 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 6918 goto free; 6919 link->u.mgd.beacon_crc = ncrc; 6920 link->u.mgd.beacon_crc_valid = true; 6921 6922 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6923 6924 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 6925 rx_status->device_timestamp, 6926 elems, elems, 6927 IEEE80211_CSA_SOURCE_BEACON); 6928 6929 /* note that after this elems->ml_basic can no longer be used fully */ 6930 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 6931 6932 if (!link->u.mgd.disable_wmm_tracking && 6933 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 6934 elems->wmm_param_len, 6935 elems->mu_edca_param_set)) 6936 changed |= BSS_CHANGED_QOS; 6937 6938 /* 6939 * If we haven't had a beacon before, tell the driver about the 6940 * DTIM period (and beacon timing if desired) now. 6941 */ 6942 if (!link->u.mgd.have_beacon) { 6943 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 6944 bss_conf->dtim_period = elems->dtim_period ?: 1; 6945 6946 changed |= BSS_CHANGED_BEACON_INFO; 6947 link->u.mgd.have_beacon = true; 6948 6949 ieee80211_recalc_ps(local); 6950 6951 ieee80211_recalc_ps_vif(sdata); 6952 } 6953 6954 if (elems->erp_info) { 6955 erp_valid = true; 6956 erp_value = elems->erp_info[0]; 6957 } else { 6958 erp_valid = false; 6959 } 6960 6961 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6962 changed |= ieee80211_handle_bss_capability(link, 6963 le16_to_cpu(mgmt->u.beacon.capab_info), 6964 erp_valid, erp_value); 6965 6966 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6967 if (WARN_ON(!sta)) { 6968 goto free; 6969 } 6970 link_sta = rcu_dereference_protected(sta->link[link->link_id], 6971 lockdep_is_held(&local->hw.wiphy->mtx)); 6972 if (WARN_ON(!link_sta)) { 6973 goto free; 6974 } 6975 6976 if (WARN_ON(!link->conf->chanreq.oper.chan)) 6977 goto free; 6978 6979 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 6980 6981 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 6982 6983 if (ieee80211_config_bw(link, elems, true, &changed)) { 6984 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6985 WLAN_REASON_DEAUTH_LEAVING, 6986 true, deauth_buf); 6987 ieee80211_report_disconnect(sdata, deauth_buf, 6988 sizeof(deauth_buf), true, 6989 WLAN_REASON_DEAUTH_LEAVING, 6990 false); 6991 goto free; 6992 } 6993 6994 if (elems->opmode_notif) 6995 ieee80211_vht_handle_opmode(sdata, link_sta, 6996 *elems->opmode_notif, 6997 rx_status->band); 6998 6999 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7000 elems->country_elem, 7001 elems->country_elem_len, 7002 elems->pwr_constr_elem, 7003 elems->cisco_dtpc_elem); 7004 7005 ieee80211_ml_reconfiguration(sdata, elems); 7006 ieee80211_process_adv_ttlm(sdata, elems, 7007 le64_to_cpu(mgmt->u.beacon.timestamp)); 7008 7009 ieee80211_link_info_change_notify(sdata, link, changed); 7010 free: 7011 kfree(elems); 7012 } 7013 7014 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7015 struct ieee80211_neg_ttlm neg_ttlm) 7016 { 7017 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7018 u8 i; 7019 7020 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7021 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7022 7023 /* If there is an active TTLM, unset previously suspended links */ 7024 if (sdata->vif.neg_ttlm.valid) 7025 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7026 7027 /* exclude links that are already disabled by advertised TTLM */ 7028 new_active_links = 7029 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7030 new_suspended_links = 7031 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7032 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7033 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7034 new_dormant_links, new_suspended_links)) 7035 return; 7036 7037 sdata->vif.neg_ttlm = neg_ttlm; 7038 sdata->vif.neg_ttlm.valid = true; 7039 } 7040 7041 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7042 struct wiphy_work *work) 7043 { 7044 struct ieee80211_sub_if_data *sdata = 7045 container_of(work, struct ieee80211_sub_if_data, 7046 u.mgd.neg_ttlm_timeout_work.work); 7047 7048 sdata_info(sdata, 7049 "No negotiated TTLM response from AP, disconnecting.\n"); 7050 7051 __ieee80211_disconnect(sdata); 7052 } 7053 7054 static void 7055 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7056 struct ieee80211_neg_ttlm *neg_ttlm) 7057 { 7058 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7059 7060 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7061 sizeof(neg_ttlm->downlink))) { 7062 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7063 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7064 } else { 7065 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7066 } 7067 7068 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7069 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7070 __le16 map; 7071 7072 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7073 7074 pos = skb_put(skb, len + 2); 7075 *pos++ = WLAN_EID_EXTENSION; 7076 len_pos = pos++; 7077 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7078 *pos++ = direction[i]; 7079 map_ind_pos = pos++; 7080 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7081 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7082 cpu_to_le16(neg_ttlm->uplink[tid]) : 7083 cpu_to_le16(neg_ttlm->downlink[tid]); 7084 if (!map) 7085 continue; 7086 7087 len += 2; 7088 map_ind |= BIT(tid); 7089 skb_put_data(skb, &map, sizeof(map)); 7090 } 7091 7092 *map_ind_pos = map_ind; 7093 *len_pos = len; 7094 7095 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7096 break; 7097 } 7098 } 7099 7100 static void 7101 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7102 struct ieee80211_neg_ttlm *neg_ttlm, 7103 u8 dialog_token) 7104 { 7105 struct ieee80211_local *local = sdata->local; 7106 struct ieee80211_mgmt *mgmt; 7107 struct sk_buff *skb; 7108 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7109 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7110 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7111 7112 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7113 if (!skb) 7114 return; 7115 7116 skb_reserve(skb, local->tx_headroom); 7117 mgmt = skb_put_zero(skb, hdr_len); 7118 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7119 IEEE80211_STYPE_ACTION); 7120 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7121 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7122 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7123 7124 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7125 mgmt->u.action.u.ttlm_req.action_code = 7126 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7127 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7128 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7129 ieee80211_tx_skb(sdata, skb); 7130 } 7131 7132 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7133 struct cfg80211_ttlm_params *params) 7134 { 7135 struct ieee80211_neg_ttlm neg_ttlm = {}; 7136 u8 i; 7137 7138 if (!ieee80211_vif_is_mld(&sdata->vif) || 7139 !(sdata->vif.cfg.mld_capa_op & 7140 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7141 return -EINVAL; 7142 7143 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7144 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7145 (params->ulink[i] & ~sdata->vif.valid_links)) 7146 return -EINVAL; 7147 7148 neg_ttlm.downlink[i] = params->dlink[i]; 7149 neg_ttlm.uplink[i] = params->ulink[i]; 7150 } 7151 7152 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7153 NEG_TTLM_RES_ACCEPT) 7154 return -EINVAL; 7155 7156 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7157 sdata->u.mgd.dialog_token_alloc++; 7158 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7159 sdata->u.mgd.dialog_token_alloc); 7160 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7161 &sdata->u.mgd.neg_ttlm_timeout_work); 7162 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7163 &sdata->u.mgd.neg_ttlm_timeout_work, 7164 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7165 return 0; 7166 } 7167 7168 static void 7169 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7170 enum ieee80211_neg_ttlm_res ttlm_res, 7171 u8 dialog_token, 7172 struct ieee80211_neg_ttlm *neg_ttlm) 7173 { 7174 struct ieee80211_local *local = sdata->local; 7175 struct ieee80211_mgmt *mgmt; 7176 struct sk_buff *skb; 7177 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7178 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7179 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7180 7181 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7182 if (!skb) 7183 return; 7184 7185 skb_reserve(skb, local->tx_headroom); 7186 mgmt = skb_put_zero(skb, hdr_len); 7187 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7188 IEEE80211_STYPE_ACTION); 7189 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7190 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7191 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7192 7193 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7194 mgmt->u.action.u.ttlm_res.action_code = 7195 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7196 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7197 switch (ttlm_res) { 7198 default: 7199 WARN_ON(1); 7200 fallthrough; 7201 case NEG_TTLM_RES_REJECT: 7202 mgmt->u.action.u.ttlm_res.status_code = 7203 WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7204 break; 7205 case NEG_TTLM_RES_ACCEPT: 7206 mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS; 7207 break; 7208 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7209 mgmt->u.action.u.ttlm_res.status_code = 7210 WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7211 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7212 break; 7213 } 7214 7215 ieee80211_tx_skb(sdata, skb); 7216 } 7217 7218 static int 7219 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7220 const struct ieee80211_ttlm_elem *ttlm, 7221 struct ieee80211_neg_ttlm *neg_ttlm, 7222 u8 *direction) 7223 { 7224 u8 control, link_map_presence, map_size, tid; 7225 u8 *pos; 7226 7227 /* The element size was already validated in 7228 * ieee80211_tid_to_link_map_size_ok() 7229 */ 7230 pos = (void *)ttlm->optional; 7231 7232 control = ttlm->control; 7233 7234 /* mapping switch time and expected duration fields are not expected 7235 * in case of negotiated TTLM 7236 */ 7237 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7238 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7239 mlme_dbg(sdata, 7240 "Invalid TTLM element in negotiated TTLM request\n"); 7241 return -EINVAL; 7242 } 7243 7244 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7245 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7246 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7247 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7248 } 7249 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7250 return 0; 7251 } 7252 7253 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7254 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7255 *direction != IEEE80211_TTLM_DIRECTION_UP && 7256 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7257 return -EINVAL; 7258 7259 link_map_presence = *pos; 7260 pos++; 7261 7262 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7263 map_size = 1; 7264 else 7265 map_size = 2; 7266 7267 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7268 u16 map; 7269 7270 if (link_map_presence & BIT(tid)) { 7271 map = ieee80211_get_ttlm(map_size, pos); 7272 if (!map) { 7273 mlme_dbg(sdata, 7274 "No active links for TID %d", tid); 7275 return -EINVAL; 7276 } 7277 } else { 7278 map = 0; 7279 } 7280 7281 switch (*direction) { 7282 case IEEE80211_TTLM_DIRECTION_BOTH: 7283 neg_ttlm->downlink[tid] = map; 7284 neg_ttlm->uplink[tid] = map; 7285 break; 7286 case IEEE80211_TTLM_DIRECTION_DOWN: 7287 neg_ttlm->downlink[tid] = map; 7288 break; 7289 case IEEE80211_TTLM_DIRECTION_UP: 7290 neg_ttlm->uplink[tid] = map; 7291 break; 7292 default: 7293 return -EINVAL; 7294 } 7295 pos += map_size; 7296 } 7297 return 0; 7298 } 7299 7300 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7301 struct ieee80211_mgmt *mgmt, size_t len) 7302 { 7303 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7304 size_t ies_len; 7305 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7306 struct ieee802_11_elems *elems = NULL; 7307 struct ieee80211_neg_ttlm neg_ttlm = {}; 7308 7309 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7310 7311 if (!ieee80211_vif_is_mld(&sdata->vif)) 7312 return; 7313 7314 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7315 ies_len = len - offsetof(struct ieee80211_mgmt, 7316 u.action.u.ttlm_req.variable); 7317 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7318 ies_len, true, NULL); 7319 if (!elems) { 7320 ttlm_res = NEG_TTLM_RES_REJECT; 7321 goto out; 7322 } 7323 7324 for (i = 0; i < elems->ttlm_num; i++) { 7325 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7326 &neg_ttlm, &direction[i]) || 7327 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7328 elems->ttlm_num != 1)) { 7329 ttlm_res = NEG_TTLM_RES_REJECT; 7330 goto out; 7331 } 7332 } 7333 7334 if (!elems->ttlm_num || 7335 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7336 ttlm_res = NEG_TTLM_RES_REJECT; 7337 goto out; 7338 } 7339 7340 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7341 if ((neg_ttlm.downlink[i] && 7342 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7343 (neg_ttlm.uplink[i] && 7344 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7345 ttlm_res = NEG_TTLM_RES_REJECT; 7346 goto out; 7347 } 7348 } 7349 7350 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7351 7352 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 7353 goto out; 7354 7355 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7356 out: 7357 kfree(elems); 7358 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 7359 } 7360 7361 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7362 struct ieee80211_mgmt *mgmt, size_t len) 7363 { 7364 if (!ieee80211_vif_is_mld(&sdata->vif) || 7365 mgmt->u.action.u.ttlm_req.dialog_token != 7366 sdata->u.mgd.dialog_token_alloc) 7367 return; 7368 7369 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7370 &sdata->u.mgd.neg_ttlm_timeout_work); 7371 7372 /* MLD station sends a TID to link mapping request, mainly to handle 7373 * BTM (BSS transition management) request, in which case it needs to 7374 * restrict the active links set. 7375 * In this case it's not expected that the MLD AP will reject the 7376 * negotiated TTLM request. 7377 * This can be better implemented in the future, to handle request 7378 * rejections. 7379 */ 7380 if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS) 7381 __ieee80211_disconnect(sdata); 7382 } 7383 7384 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 7385 struct wiphy_work *work) 7386 { 7387 u16 new_dormant_links; 7388 struct ieee80211_sub_if_data *sdata = 7389 container_of(work, struct ieee80211_sub_if_data, 7390 u.mgd.teardown_ttlm_work); 7391 7392 if (!sdata->vif.neg_ttlm.valid) 7393 return; 7394 7395 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7396 new_dormant_links = 7397 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7398 sdata->vif.suspended_links = 0; 7399 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7400 new_dormant_links); 7401 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 7402 BSS_CHANGED_MLD_VALID_LINKS); 7403 } 7404 7405 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 7406 { 7407 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7408 struct ieee80211_local *local = sdata->local; 7409 struct ieee80211_mgmt *mgmt; 7410 struct sk_buff *skb; 7411 int frame_len = offsetofend(struct ieee80211_mgmt, 7412 u.action.u.ttlm_tear_down); 7413 struct ieee80211_tx_info *info; 7414 7415 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 7416 if (!skb) 7417 return; 7418 7419 skb_reserve(skb, local->hw.extra_tx_headroom); 7420 mgmt = skb_put_zero(skb, frame_len); 7421 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7422 IEEE80211_STYPE_ACTION); 7423 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7424 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7425 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7426 7427 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7428 mgmt->u.action.u.ttlm_tear_down.action_code = 7429 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 7430 7431 info = IEEE80211_SKB_CB(skb); 7432 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 7433 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 7434 ieee80211_tx_skb(sdata, skb); 7435 } 7436 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 7437 7438 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 7439 struct sk_buff *skb) 7440 { 7441 struct ieee80211_link_data *link = &sdata->deflink; 7442 struct ieee80211_rx_status *rx_status; 7443 struct ieee80211_hdr *hdr; 7444 u16 fc; 7445 7446 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7447 7448 rx_status = (struct ieee80211_rx_status *) skb->cb; 7449 hdr = (struct ieee80211_hdr *) skb->data; 7450 fc = le16_to_cpu(hdr->frame_control); 7451 7452 switch (fc & IEEE80211_FCTL_STYPE) { 7453 case IEEE80211_STYPE_S1G_BEACON: 7454 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 7455 break; 7456 } 7457 } 7458 7459 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 7460 struct sk_buff *skb) 7461 { 7462 struct ieee80211_link_data *link = &sdata->deflink; 7463 struct ieee80211_rx_status *rx_status; 7464 struct ieee802_11_elems *elems; 7465 struct ieee80211_mgmt *mgmt; 7466 u16 fc; 7467 int ies_len; 7468 7469 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7470 7471 rx_status = (struct ieee80211_rx_status *) skb->cb; 7472 mgmt = (struct ieee80211_mgmt *) skb->data; 7473 fc = le16_to_cpu(mgmt->frame_control); 7474 7475 if (rx_status->link_valid) { 7476 link = sdata_dereference(sdata->link[rx_status->link_id], 7477 sdata); 7478 if (!link) 7479 return; 7480 } 7481 7482 switch (fc & IEEE80211_FCTL_STYPE) { 7483 case IEEE80211_STYPE_BEACON: 7484 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 7485 skb->len, rx_status); 7486 break; 7487 case IEEE80211_STYPE_PROBE_RESP: 7488 ieee80211_rx_mgmt_probe_resp(link, skb); 7489 break; 7490 case IEEE80211_STYPE_AUTH: 7491 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 7492 break; 7493 case IEEE80211_STYPE_DEAUTH: 7494 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 7495 break; 7496 case IEEE80211_STYPE_DISASSOC: 7497 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 7498 break; 7499 case IEEE80211_STYPE_ASSOC_RESP: 7500 case IEEE80211_STYPE_REASSOC_RESP: 7501 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 7502 break; 7503 case IEEE80211_STYPE_ACTION: 7504 if (!sdata->u.mgd.associated || 7505 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 7506 break; 7507 7508 switch (mgmt->u.action.category) { 7509 case WLAN_CATEGORY_SPECTRUM_MGMT: 7510 ies_len = skb->len - 7511 offsetof(struct ieee80211_mgmt, 7512 u.action.u.chan_switch.variable); 7513 7514 if (ies_len < 0) 7515 break; 7516 7517 /* CSA IE cannot be overridden, no need for BSSID */ 7518 elems = ieee802_11_parse_elems( 7519 mgmt->u.action.u.chan_switch.variable, 7520 ies_len, true, NULL); 7521 7522 if (elems && !elems->parse_error) { 7523 enum ieee80211_csa_source src = 7524 IEEE80211_CSA_SOURCE_PROT_ACTION; 7525 7526 ieee80211_sta_process_chanswitch(link, 7527 rx_status->mactime, 7528 rx_status->device_timestamp, 7529 elems, elems, 7530 src); 7531 } 7532 kfree(elems); 7533 break; 7534 case WLAN_CATEGORY_PUBLIC: 7535 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 7536 ies_len = skb->len - 7537 offsetof(struct ieee80211_mgmt, 7538 u.action.u.ext_chan_switch.variable); 7539 7540 if (ies_len < 0) 7541 break; 7542 7543 /* 7544 * extended CSA IE can't be overridden, no need for 7545 * BSSID 7546 */ 7547 elems = ieee802_11_parse_elems( 7548 mgmt->u.action.u.ext_chan_switch.variable, 7549 ies_len, true, NULL); 7550 7551 if (elems && !elems->parse_error) { 7552 enum ieee80211_csa_source src; 7553 7554 if (mgmt->u.action.category == 7555 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 7556 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 7557 else 7558 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 7559 7560 /* for the handling code pretend it was an IE */ 7561 elems->ext_chansw_ie = 7562 &mgmt->u.action.u.ext_chan_switch.data; 7563 7564 ieee80211_sta_process_chanswitch(link, 7565 rx_status->mactime, 7566 rx_status->device_timestamp, 7567 elems, elems, 7568 src); 7569 } 7570 7571 kfree(elems); 7572 break; 7573 } 7574 break; 7575 } 7576 } 7577 7578 static void ieee80211_sta_timer(struct timer_list *t) 7579 { 7580 struct ieee80211_sub_if_data *sdata = 7581 from_timer(sdata, t, u.mgd.timer); 7582 7583 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 7584 } 7585 7586 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 7587 u8 reason, bool tx) 7588 { 7589 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7590 7591 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 7592 tx, frame_buf); 7593 7594 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7595 reason, false); 7596 } 7597 7598 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 7599 { 7600 struct ieee80211_local *local = sdata->local; 7601 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7602 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 7603 u32 tx_flags = 0; 7604 u16 trans = 1; 7605 u16 status = 0; 7606 struct ieee80211_prep_tx_info info = { 7607 .subtype = IEEE80211_STYPE_AUTH, 7608 }; 7609 7610 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7611 7612 if (WARN_ON_ONCE(!auth_data)) 7613 return -EINVAL; 7614 7615 auth_data->tries++; 7616 7617 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 7618 sdata_info(sdata, "authentication with %pM timed out\n", 7619 auth_data->ap_addr); 7620 7621 /* 7622 * Most likely AP is not in the range so remove the 7623 * bss struct for that AP. 7624 */ 7625 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 7626 7627 return -ETIMEDOUT; 7628 } 7629 7630 if (auth_data->algorithm == WLAN_AUTH_SAE) 7631 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 7632 7633 info.link_id = auth_data->link_id; 7634 drv_mgd_prepare_tx(local, sdata, &info); 7635 7636 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 7637 auth_data->ap_addr, auth_data->tries, 7638 IEEE80211_AUTH_MAX_TRIES); 7639 7640 auth_data->expected_transaction = 2; 7641 7642 if (auth_data->algorithm == WLAN_AUTH_SAE) { 7643 trans = auth_data->sae_trans; 7644 status = auth_data->sae_status; 7645 auth_data->expected_transaction = trans; 7646 } 7647 7648 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7649 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 7650 IEEE80211_TX_INTFL_MLME_CONN_TX; 7651 7652 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 7653 auth_data->data, auth_data->data_len, 7654 auth_data->ap_addr, auth_data->ap_addr, 7655 NULL, 0, 0, tx_flags); 7656 7657 if (tx_flags == 0) { 7658 if (auth_data->algorithm == WLAN_AUTH_SAE) 7659 auth_data->timeout = jiffies + 7660 IEEE80211_AUTH_TIMEOUT_SAE; 7661 else 7662 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 7663 } else { 7664 auth_data->timeout = 7665 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 7666 } 7667 7668 auth_data->timeout_started = true; 7669 run_again(sdata, auth_data->timeout); 7670 7671 return 0; 7672 } 7673 7674 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 7675 { 7676 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 7677 struct ieee80211_local *local = sdata->local; 7678 int ret; 7679 7680 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7681 7682 assoc_data->tries++; 7683 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 7684 sdata_info(sdata, "association with %pM timed out\n", 7685 assoc_data->ap_addr); 7686 7687 /* 7688 * Most likely AP is not in the range so remove the 7689 * bss struct for that AP. 7690 */ 7691 cfg80211_unlink_bss(local->hw.wiphy, 7692 assoc_data->link[assoc_data->assoc_link_id].bss); 7693 7694 return -ETIMEDOUT; 7695 } 7696 7697 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 7698 assoc_data->ap_addr, assoc_data->tries, 7699 IEEE80211_ASSOC_MAX_TRIES); 7700 ret = ieee80211_send_assoc(sdata); 7701 if (ret) 7702 return ret; 7703 7704 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7705 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 7706 assoc_data->timeout_started = true; 7707 run_again(sdata, assoc_data->timeout); 7708 } else { 7709 assoc_data->timeout = 7710 round_jiffies_up(jiffies + 7711 IEEE80211_ASSOC_TIMEOUT_LONG); 7712 assoc_data->timeout_started = true; 7713 run_again(sdata, assoc_data->timeout); 7714 } 7715 7716 return 0; 7717 } 7718 7719 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 7720 __le16 fc, bool acked) 7721 { 7722 struct ieee80211_local *local = sdata->local; 7723 7724 sdata->u.mgd.status_fc = fc; 7725 sdata->u.mgd.status_acked = acked; 7726 sdata->u.mgd.status_received = true; 7727 7728 wiphy_work_queue(local->hw.wiphy, &sdata->work); 7729 } 7730 7731 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 7732 { 7733 struct ieee80211_local *local = sdata->local; 7734 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7735 7736 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7737 7738 if (ifmgd->status_received) { 7739 __le16 fc = ifmgd->status_fc; 7740 bool status_acked = ifmgd->status_acked; 7741 7742 ifmgd->status_received = false; 7743 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 7744 if (status_acked) { 7745 if (ifmgd->auth_data->algorithm == 7746 WLAN_AUTH_SAE) 7747 ifmgd->auth_data->timeout = 7748 jiffies + 7749 IEEE80211_AUTH_TIMEOUT_SAE; 7750 else 7751 ifmgd->auth_data->timeout = 7752 jiffies + 7753 IEEE80211_AUTH_TIMEOUT_SHORT; 7754 run_again(sdata, ifmgd->auth_data->timeout); 7755 } else { 7756 ifmgd->auth_data->timeout = jiffies - 1; 7757 } 7758 ifmgd->auth_data->timeout_started = true; 7759 } else if (ifmgd->assoc_data && 7760 !ifmgd->assoc_data->comeback && 7761 (ieee80211_is_assoc_req(fc) || 7762 ieee80211_is_reassoc_req(fc))) { 7763 /* 7764 * Update association timeout based on the TX status 7765 * for the (Re)Association Request frame. Skip this if 7766 * we have already processed a (Re)Association Response 7767 * frame that indicated need for association comeback 7768 * at a specific time in the future. This could happen 7769 * if the TX status information is delayed enough for 7770 * the response to be received and processed first. 7771 */ 7772 if (status_acked) { 7773 ifmgd->assoc_data->timeout = 7774 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 7775 run_again(sdata, ifmgd->assoc_data->timeout); 7776 } else { 7777 ifmgd->assoc_data->timeout = jiffies - 1; 7778 } 7779 ifmgd->assoc_data->timeout_started = true; 7780 } 7781 } 7782 7783 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 7784 time_after(jiffies, ifmgd->auth_data->timeout)) { 7785 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 7786 /* 7787 * ok ... we waited for assoc or continuation but 7788 * userspace didn't do it, so kill the auth data 7789 */ 7790 ieee80211_destroy_auth_data(sdata, false); 7791 } else if (ieee80211_auth(sdata)) { 7792 u8 ap_addr[ETH_ALEN]; 7793 struct ieee80211_event event = { 7794 .type = MLME_EVENT, 7795 .u.mlme.data = AUTH_EVENT, 7796 .u.mlme.status = MLME_TIMEOUT, 7797 }; 7798 7799 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 7800 7801 ieee80211_destroy_auth_data(sdata, false); 7802 7803 cfg80211_auth_timeout(sdata->dev, ap_addr); 7804 drv_event_callback(sdata->local, sdata, &event); 7805 } 7806 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 7807 run_again(sdata, ifmgd->auth_data->timeout); 7808 7809 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 7810 time_after(jiffies, ifmgd->assoc_data->timeout)) { 7811 if ((ifmgd->assoc_data->need_beacon && 7812 !sdata->deflink.u.mgd.have_beacon) || 7813 ieee80211_do_assoc(sdata)) { 7814 struct ieee80211_event event = { 7815 .type = MLME_EVENT, 7816 .u.mlme.data = ASSOC_EVENT, 7817 .u.mlme.status = MLME_TIMEOUT, 7818 }; 7819 7820 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7821 drv_event_callback(sdata->local, sdata, &event); 7822 } 7823 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 7824 run_again(sdata, ifmgd->assoc_data->timeout); 7825 7826 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 7827 ifmgd->associated) { 7828 u8 *bssid = sdata->deflink.u.mgd.bssid; 7829 int max_tries; 7830 7831 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7832 max_tries = max_nullfunc_tries; 7833 else 7834 max_tries = max_probe_tries; 7835 7836 /* ACK received for nullfunc probing frame */ 7837 if (!ifmgd->probe_send_count) 7838 ieee80211_reset_ap_probe(sdata); 7839 else if (ifmgd->nullfunc_failed) { 7840 if (ifmgd->probe_send_count < max_tries) { 7841 mlme_dbg(sdata, 7842 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 7843 bssid, ifmgd->probe_send_count, 7844 max_tries); 7845 ieee80211_mgd_probe_ap_send(sdata); 7846 } else { 7847 mlme_dbg(sdata, 7848 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 7849 bssid); 7850 ieee80211_sta_connection_lost(sdata, 7851 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 7852 false); 7853 } 7854 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 7855 run_again(sdata, ifmgd->probe_timeout); 7856 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7857 mlme_dbg(sdata, 7858 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 7859 bssid, probe_wait_ms); 7860 ieee80211_sta_connection_lost(sdata, 7861 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7862 } else if (ifmgd->probe_send_count < max_tries) { 7863 mlme_dbg(sdata, 7864 "No probe response from AP %pM after %dms, try %d/%i\n", 7865 bssid, probe_wait_ms, 7866 ifmgd->probe_send_count, max_tries); 7867 ieee80211_mgd_probe_ap_send(sdata); 7868 } else { 7869 /* 7870 * We actually lost the connection ... or did we? 7871 * Let's make sure! 7872 */ 7873 mlme_dbg(sdata, 7874 "No probe response from AP %pM after %dms, disconnecting.\n", 7875 bssid, probe_wait_ms); 7876 7877 ieee80211_sta_connection_lost(sdata, 7878 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7879 } 7880 } 7881 } 7882 7883 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 7884 { 7885 struct ieee80211_sub_if_data *sdata = 7886 from_timer(sdata, t, u.mgd.bcn_mon_timer); 7887 7888 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7889 return; 7890 7891 if (sdata->vif.bss_conf.csa_active && 7892 !sdata->deflink.u.mgd.csa.waiting_bcn) 7893 return; 7894 7895 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 7896 return; 7897 7898 sdata->u.mgd.connection_loss = false; 7899 wiphy_work_queue(sdata->local->hw.wiphy, 7900 &sdata->u.mgd.beacon_connection_loss_work); 7901 } 7902 7903 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 7904 { 7905 struct ieee80211_sub_if_data *sdata = 7906 from_timer(sdata, t, u.mgd.conn_mon_timer); 7907 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7908 struct ieee80211_local *local = sdata->local; 7909 struct sta_info *sta; 7910 unsigned long timeout; 7911 7912 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7913 return; 7914 7915 if (sdata->vif.bss_conf.csa_active && 7916 !sdata->deflink.u.mgd.csa.waiting_bcn) 7917 return; 7918 7919 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7920 if (!sta) 7921 return; 7922 7923 timeout = sta->deflink.status_stats.last_ack; 7924 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 7925 timeout = sta->deflink.rx_stats.last_rx; 7926 timeout += IEEE80211_CONNECTION_IDLE_TIME; 7927 7928 /* If timeout is after now, then update timer to fire at 7929 * the later date, but do not actually probe at this time. 7930 */ 7931 if (time_is_after_jiffies(timeout)) { 7932 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 7933 return; 7934 } 7935 7936 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 7937 } 7938 7939 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 7940 struct wiphy_work *work) 7941 { 7942 struct ieee80211_sub_if_data *sdata = 7943 container_of(work, struct ieee80211_sub_if_data, 7944 u.mgd.monitor_work); 7945 7946 ieee80211_mgd_probe_ap(sdata, false); 7947 } 7948 7949 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 7950 { 7951 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 7952 __ieee80211_stop_poll(sdata); 7953 7954 /* let's probe the connection once */ 7955 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 7956 wiphy_work_queue(sdata->local->hw.wiphy, 7957 &sdata->u.mgd.monitor_work); 7958 } 7959 } 7960 7961 #ifdef CONFIG_PM 7962 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 7963 { 7964 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7965 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7966 7967 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7968 7969 if (ifmgd->auth_data || ifmgd->assoc_data) { 7970 const u8 *ap_addr = ifmgd->auth_data ? 7971 ifmgd->auth_data->ap_addr : 7972 ifmgd->assoc_data->ap_addr; 7973 7974 /* 7975 * If we are trying to authenticate / associate while suspending, 7976 * cfg80211 won't know and won't actually abort those attempts, 7977 * thus we need to do that ourselves. 7978 */ 7979 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 7980 IEEE80211_STYPE_DEAUTH, 7981 WLAN_REASON_DEAUTH_LEAVING, 7982 false, frame_buf); 7983 if (ifmgd->assoc_data) 7984 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7985 if (ifmgd->auth_data) 7986 ieee80211_destroy_auth_data(sdata, false); 7987 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 7988 IEEE80211_DEAUTH_FRAME_LEN, 7989 false); 7990 } 7991 7992 /* This is a bit of a hack - we should find a better and more generic 7993 * solution to this. Normally when suspending, cfg80211 will in fact 7994 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 7995 * auth (not so important) or assoc (this is the problem) process. 7996 * 7997 * As a consequence, it can happen that we are in the process of both 7998 * associating and suspending, and receive an association response 7999 * after cfg80211 has checked if it needs to disconnect, but before 8000 * we actually set the flag to drop incoming frames. This will then 8001 * cause the workqueue flush to process the association response in 8002 * the suspend, resulting in a successful association just before it 8003 * tries to remove the interface from the driver, which now though 8004 * has a channel context assigned ... this results in issues. 8005 * 8006 * To work around this (for now) simply deauth here again if we're 8007 * now connected. 8008 */ 8009 if (ifmgd->associated && !sdata->local->wowlan) { 8010 u8 bssid[ETH_ALEN]; 8011 struct cfg80211_deauth_request req = { 8012 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8013 .bssid = bssid, 8014 }; 8015 8016 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8017 ieee80211_mgd_deauth(sdata, &req); 8018 } 8019 } 8020 #endif 8021 8022 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8023 { 8024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8025 8026 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8027 8028 if (!ifmgd->associated) 8029 return; 8030 8031 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8032 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8033 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8034 ieee80211_sta_connection_lost(sdata, 8035 WLAN_REASON_UNSPECIFIED, 8036 true); 8037 return; 8038 } 8039 8040 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8041 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8042 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8043 ieee80211_sta_connection_lost(sdata, 8044 WLAN_REASON_UNSPECIFIED, 8045 true); 8046 return; 8047 } 8048 } 8049 8050 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8051 struct wiphy_work *work) 8052 { 8053 struct ieee80211_link_data *link = 8054 container_of(work, struct ieee80211_link_data, 8055 u.mgd.request_smps_work); 8056 8057 __ieee80211_request_smps_mgd(link->sdata, link, 8058 link->u.mgd.driver_smps_mode); 8059 } 8060 8061 /* interface setup */ 8062 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8063 { 8064 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8065 8066 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8067 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8068 ieee80211_beacon_connection_loss_work); 8069 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8070 ieee80211_csa_connection_drop_work); 8071 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8072 ieee80211_tdls_peer_del_work); 8073 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8074 ieee80211_ml_reconf_work); 8075 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8076 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8077 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8078 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8079 ieee80211_sta_handle_tspec_ac_params_wk); 8080 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8081 ieee80211_tid_to_link_map_work); 8082 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8083 ieee80211_neg_ttlm_timeout_work); 8084 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8085 ieee80211_teardown_ttlm_work); 8086 8087 ifmgd->flags = 0; 8088 ifmgd->powersave = sdata->wdev.ps; 8089 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8090 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8091 /* Setup TDLS data */ 8092 spin_lock_init(&ifmgd->teardown_lock); 8093 ifmgd->teardown_skb = NULL; 8094 ifmgd->orig_teardown_skb = NULL; 8095 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8096 } 8097 8098 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8099 struct wiphy_work *work) 8100 { 8101 struct ieee80211_link_data *link = 8102 container_of(work, struct ieee80211_link_data, 8103 u.mgd.recalc_smps); 8104 8105 ieee80211_recalc_smps(link->sdata, link); 8106 } 8107 8108 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8109 { 8110 struct ieee80211_sub_if_data *sdata = link->sdata; 8111 struct ieee80211_local *local = sdata->local; 8112 unsigned int link_id = link->link_id; 8113 8114 link->u.mgd.p2p_noa_index = -1; 8115 link->conf->bssid = link->u.mgd.bssid; 8116 link->smps_mode = IEEE80211_SMPS_OFF; 8117 8118 wiphy_work_init(&link->u.mgd.request_smps_work, 8119 ieee80211_request_smps_mgd_work); 8120 wiphy_work_init(&link->u.mgd.recalc_smps, 8121 ieee80211_recalc_smps_work); 8122 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8123 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8124 else 8125 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8126 8127 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8128 ieee80211_csa_switch_work); 8129 8130 ieee80211_clear_tpe(&link->conf->tpe); 8131 8132 if (sdata->u.mgd.assoc_data) 8133 ether_addr_copy(link->conf->addr, 8134 sdata->u.mgd.assoc_data->link[link_id].addr); 8135 else if (!is_valid_ether_addr(link->conf->addr)) 8136 eth_random_addr(link->conf->addr); 8137 } 8138 8139 /* scan finished notification */ 8140 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8141 { 8142 struct ieee80211_sub_if_data *sdata; 8143 8144 /* Restart STA timers */ 8145 rcu_read_lock(); 8146 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8147 if (ieee80211_sdata_running(sdata)) 8148 ieee80211_restart_sta_timer(sdata); 8149 } 8150 rcu_read_unlock(); 8151 } 8152 8153 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8154 struct cfg80211_bss *cbss, s8 link_id, 8155 const u8 *ap_mld_addr, bool assoc, 8156 struct ieee80211_conn_settings *conn, 8157 bool override) 8158 { 8159 struct ieee80211_local *local = sdata->local; 8160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8161 struct ieee80211_bss *bss = (void *)cbss->priv; 8162 struct sta_info *new_sta = NULL; 8163 struct ieee80211_link_data *link; 8164 bool have_sta = false; 8165 bool mlo; 8166 int err; 8167 8168 if (link_id >= 0) { 8169 mlo = true; 8170 if (WARN_ON(!ap_mld_addr)) 8171 return -EINVAL; 8172 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 8173 } else { 8174 if (WARN_ON(ap_mld_addr)) 8175 return -EINVAL; 8176 ap_mld_addr = cbss->bssid; 8177 err = ieee80211_vif_set_links(sdata, 0, 0); 8178 link_id = 0; 8179 mlo = false; 8180 } 8181 8182 if (err) 8183 return err; 8184 8185 link = sdata_dereference(sdata->link[link_id], sdata); 8186 if (WARN_ON(!link)) { 8187 err = -ENOLINK; 8188 goto out_err; 8189 } 8190 8191 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8192 err = -EINVAL; 8193 goto out_err; 8194 } 8195 8196 /* If a reconfig is happening, bail out */ 8197 if (local->in_reconfig) { 8198 err = -EBUSY; 8199 goto out_err; 8200 } 8201 8202 if (assoc) { 8203 rcu_read_lock(); 8204 have_sta = sta_info_get(sdata, ap_mld_addr); 8205 rcu_read_unlock(); 8206 } 8207 8208 if (!have_sta) { 8209 if (mlo) 8210 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8211 link_id, cbss->bssid, 8212 GFP_KERNEL); 8213 else 8214 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8215 8216 if (!new_sta) { 8217 err = -ENOMEM; 8218 goto out_err; 8219 } 8220 8221 new_sta->sta.mlo = mlo; 8222 } 8223 8224 /* 8225 * Set up the information for the new channel before setting the 8226 * new channel. We can't - completely race-free - change the basic 8227 * rates bitmap and the channel (sband) that it refers to, but if 8228 * we set it up before we at least avoid calling into the driver's 8229 * bss_info_changed() method with invalid information (since we do 8230 * call that from changing the channel - only for IDLE and perhaps 8231 * some others, but ...). 8232 * 8233 * So to avoid that, just set up all the new information before the 8234 * channel, but tell the driver to apply it only afterwards, since 8235 * it might need the new channel for that. 8236 */ 8237 if (new_sta) { 8238 const struct cfg80211_bss_ies *ies; 8239 struct link_sta_info *link_sta; 8240 8241 rcu_read_lock(); 8242 link_sta = rcu_dereference(new_sta->link[link_id]); 8243 if (WARN_ON(!link_sta)) { 8244 rcu_read_unlock(); 8245 sta_info_free(local, new_sta); 8246 err = -EINVAL; 8247 goto out_err; 8248 } 8249 8250 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8251 link_sta, cbss); 8252 if (err) { 8253 rcu_read_unlock(); 8254 sta_info_free(local, new_sta); 8255 goto out_err; 8256 } 8257 8258 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8259 8260 /* set timing information */ 8261 link->conf->beacon_int = cbss->beacon_interval; 8262 ies = rcu_dereference(cbss->beacon_ies); 8263 if (ies) { 8264 link->conf->sync_tsf = ies->tsf; 8265 link->conf->sync_device_ts = 8266 bss->device_ts_beacon; 8267 8268 ieee80211_get_dtim(ies, 8269 &link->conf->sync_dtim_count, 8270 NULL); 8271 } else if (!ieee80211_hw_check(&sdata->local->hw, 8272 TIMING_BEACON_ONLY)) { 8273 ies = rcu_dereference(cbss->proberesp_ies); 8274 /* must be non-NULL since beacon IEs were NULL */ 8275 link->conf->sync_tsf = ies->tsf; 8276 link->conf->sync_device_ts = 8277 bss->device_ts_presp; 8278 link->conf->sync_dtim_count = 0; 8279 } else { 8280 link->conf->sync_tsf = 0; 8281 link->conf->sync_device_ts = 0; 8282 link->conf->sync_dtim_count = 0; 8283 } 8284 rcu_read_unlock(); 8285 } 8286 8287 if (new_sta || override) { 8288 /* 8289 * Only set this if we're also going to calculate the AP 8290 * settings etc., otherwise this was set before in a 8291 * previous call. Note override is set to %true in assoc 8292 * if the settings were changed. 8293 */ 8294 link->u.mgd.conn = *conn; 8295 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 8296 mlo, &link->u.mgd.conn); 8297 if (err) { 8298 if (new_sta) 8299 sta_info_free(local, new_sta); 8300 goto out_err; 8301 } 8302 /* pass out for use in assoc */ 8303 *conn = link->u.mgd.conn; 8304 } 8305 8306 if (new_sta) { 8307 /* 8308 * tell driver about BSSID, basic rates and timing 8309 * this was set up above, before setting the channel 8310 */ 8311 ieee80211_link_info_change_notify(sdata, link, 8312 BSS_CHANGED_BSSID | 8313 BSS_CHANGED_BASIC_RATES | 8314 BSS_CHANGED_BEACON_INT); 8315 8316 if (assoc) 8317 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 8318 8319 err = sta_info_insert(new_sta); 8320 new_sta = NULL; 8321 if (err) { 8322 sdata_info(sdata, 8323 "failed to insert STA entry for the AP (error %d)\n", 8324 err); 8325 goto out_release_chan; 8326 } 8327 } else 8328 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 8329 8330 /* Cancel scan to ensure that nothing interferes with connection */ 8331 if (local->scanning) 8332 ieee80211_scan_cancel(local); 8333 8334 return 0; 8335 8336 out_release_chan: 8337 ieee80211_link_release_channel(link); 8338 out_err: 8339 ieee80211_vif_set_links(sdata, 0, 0); 8340 return err; 8341 } 8342 8343 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 8344 const struct cfg80211_bss_ies *ies, 8345 u8 cur_channel, bool ignore_ecsa) 8346 { 8347 const struct element *csa_elem, *ecsa_elem; 8348 struct ieee80211_channel_sw_ie *csa = NULL; 8349 struct ieee80211_ext_chansw_ie *ecsa = NULL; 8350 8351 if (!ies) 8352 return false; 8353 8354 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 8355 ies->data, ies->len); 8356 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 8357 csa = (void *)csa_elem->data; 8358 8359 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 8360 ies->data, ies->len); 8361 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 8362 ecsa = (void *)ecsa_elem->data; 8363 8364 if (csa && csa->count == 0) 8365 csa = NULL; 8366 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 8367 csa = NULL; 8368 8369 if (ecsa && ecsa->count == 0) 8370 ecsa = NULL; 8371 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 8372 ecsa = NULL; 8373 8374 if (ignore_ecsa && ecsa) { 8375 sdata_info(sdata, 8376 "Ignoring ECSA in probe response - was considered stuck!\n"); 8377 return csa; 8378 } 8379 8380 return csa || ecsa; 8381 } 8382 8383 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 8384 struct cfg80211_bss *bss) 8385 { 8386 u8 cur_channel; 8387 bool ret; 8388 8389 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 8390 8391 rcu_read_lock(); 8392 if (ieee80211_mgd_csa_present(sdata, 8393 rcu_dereference(bss->beacon_ies), 8394 cur_channel, false)) { 8395 ret = true; 8396 goto out; 8397 } 8398 8399 if (ieee80211_mgd_csa_present(sdata, 8400 rcu_dereference(bss->proberesp_ies), 8401 cur_channel, bss->proberesp_ecsa_stuck)) { 8402 ret = true; 8403 goto out; 8404 } 8405 8406 ret = false; 8407 out: 8408 rcu_read_unlock(); 8409 return ret; 8410 } 8411 8412 /* config hooks */ 8413 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 8414 struct cfg80211_auth_request *req) 8415 { 8416 struct ieee80211_local *local = sdata->local; 8417 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8418 struct ieee80211_mgd_auth_data *auth_data; 8419 struct ieee80211_conn_settings conn; 8420 struct ieee80211_link_data *link; 8421 struct ieee80211_supported_band *sband; 8422 struct ieee80211_bss *bss; 8423 u16 auth_alg; 8424 int err; 8425 bool cont_auth, wmm_used; 8426 8427 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8428 8429 /* prepare auth data structure */ 8430 8431 switch (req->auth_type) { 8432 case NL80211_AUTHTYPE_OPEN_SYSTEM: 8433 auth_alg = WLAN_AUTH_OPEN; 8434 break; 8435 case NL80211_AUTHTYPE_SHARED_KEY: 8436 if (fips_enabled) 8437 return -EOPNOTSUPP; 8438 auth_alg = WLAN_AUTH_SHARED_KEY; 8439 break; 8440 case NL80211_AUTHTYPE_FT: 8441 auth_alg = WLAN_AUTH_FT; 8442 break; 8443 case NL80211_AUTHTYPE_NETWORK_EAP: 8444 auth_alg = WLAN_AUTH_LEAP; 8445 break; 8446 case NL80211_AUTHTYPE_SAE: 8447 auth_alg = WLAN_AUTH_SAE; 8448 break; 8449 case NL80211_AUTHTYPE_FILS_SK: 8450 auth_alg = WLAN_AUTH_FILS_SK; 8451 break; 8452 case NL80211_AUTHTYPE_FILS_SK_PFS: 8453 auth_alg = WLAN_AUTH_FILS_SK_PFS; 8454 break; 8455 case NL80211_AUTHTYPE_FILS_PK: 8456 auth_alg = WLAN_AUTH_FILS_PK; 8457 break; 8458 default: 8459 return -EOPNOTSUPP; 8460 } 8461 8462 if (ifmgd->assoc_data) 8463 return -EBUSY; 8464 8465 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 8466 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 8467 return -EINVAL; 8468 } 8469 8470 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 8471 req->ie_len, GFP_KERNEL); 8472 if (!auth_data) 8473 return -ENOMEM; 8474 8475 memcpy(auth_data->ap_addr, 8476 req->ap_mld_addr ?: req->bss->bssid, 8477 ETH_ALEN); 8478 auth_data->bss = req->bss; 8479 auth_data->link_id = req->link_id; 8480 8481 if (req->auth_data_len >= 4) { 8482 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 8483 __le16 *pos = (__le16 *) req->auth_data; 8484 8485 auth_data->sae_trans = le16_to_cpu(pos[0]); 8486 auth_data->sae_status = le16_to_cpu(pos[1]); 8487 } 8488 memcpy(auth_data->data, req->auth_data + 4, 8489 req->auth_data_len - 4); 8490 auth_data->data_len += req->auth_data_len - 4; 8491 } 8492 8493 /* Check if continuing authentication or trying to authenticate with the 8494 * same BSS that we were in the process of authenticating with and avoid 8495 * removal and re-addition of the STA entry in 8496 * ieee80211_prep_connection(). 8497 */ 8498 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 8499 ifmgd->auth_data->link_id == req->link_id; 8500 8501 if (req->ie && req->ie_len) { 8502 memcpy(&auth_data->data[auth_data->data_len], 8503 req->ie, req->ie_len); 8504 auth_data->data_len += req->ie_len; 8505 } 8506 8507 if (req->key && req->key_len) { 8508 auth_data->key_len = req->key_len; 8509 auth_data->key_idx = req->key_idx; 8510 memcpy(auth_data->key, req->key, req->key_len); 8511 } 8512 8513 auth_data->algorithm = auth_alg; 8514 8515 /* try to authenticate/probe */ 8516 8517 if (ifmgd->auth_data) { 8518 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 8519 auth_data->peer_confirmed = 8520 ifmgd->auth_data->peer_confirmed; 8521 } 8522 ieee80211_destroy_auth_data(sdata, cont_auth); 8523 } 8524 8525 /* prep auth_data so we don't go into idle on disassoc */ 8526 ifmgd->auth_data = auth_data; 8527 8528 /* If this is continuation of an ongoing SAE authentication exchange 8529 * (i.e., request to send SAE Confirm) and the peer has already 8530 * confirmed, mark authentication completed since we are about to send 8531 * out SAE Confirm. 8532 */ 8533 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 8534 auth_data->peer_confirmed && auth_data->sae_trans == 2) 8535 ieee80211_mark_sta_auth(sdata); 8536 8537 if (ifmgd->associated) { 8538 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8539 8540 sdata_info(sdata, 8541 "disconnect from AP %pM for new auth to %pM\n", 8542 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 8543 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8544 WLAN_REASON_UNSPECIFIED, 8545 false, frame_buf); 8546 8547 ieee80211_report_disconnect(sdata, frame_buf, 8548 sizeof(frame_buf), true, 8549 WLAN_REASON_UNSPECIFIED, 8550 false); 8551 } 8552 8553 /* needed for transmitting the auth frame(s) properly */ 8554 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 8555 8556 bss = (void *)req->bss->priv; 8557 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 8558 8559 sband = local->hw.wiphy->bands[req->bss->channel->band]; 8560 8561 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 8562 &conn); 8563 8564 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 8565 req->ap_mld_addr, cont_auth, 8566 &conn, false); 8567 if (err) 8568 goto err_clear; 8569 8570 if (req->link_id >= 0) 8571 link = sdata_dereference(sdata->link[req->link_id], sdata); 8572 else 8573 link = &sdata->deflink; 8574 8575 if (WARN_ON(!link)) { 8576 err = -ENOLINK; 8577 goto err_clear; 8578 } 8579 8580 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 8581 auth_data->ap_addr, link->conf->addr); 8582 8583 err = ieee80211_auth(sdata); 8584 if (err) { 8585 sta_info_destroy_addr(sdata, auth_data->ap_addr); 8586 goto err_clear; 8587 } 8588 8589 /* hold our own reference */ 8590 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 8591 return 0; 8592 8593 err_clear: 8594 if (!ieee80211_vif_is_mld(&sdata->vif)) { 8595 eth_zero_addr(sdata->deflink.u.mgd.bssid); 8596 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 8597 BSS_CHANGED_BSSID); 8598 ieee80211_link_release_channel(&sdata->deflink); 8599 } 8600 ifmgd->auth_data = NULL; 8601 kfree(auth_data); 8602 return err; 8603 } 8604 8605 static void 8606 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 8607 struct ieee80211_mgd_assoc_data *assoc_data, 8608 struct cfg80211_assoc_request *req, 8609 struct ieee80211_conn_settings *conn, 8610 unsigned int link_id) 8611 { 8612 struct ieee80211_local *local = sdata->local; 8613 const struct cfg80211_bss_ies *bss_ies; 8614 struct ieee80211_supported_band *sband; 8615 struct ieee80211_link_data *link; 8616 struct cfg80211_bss *cbss; 8617 struct ieee80211_bss *bss; 8618 8619 cbss = assoc_data->link[link_id].bss; 8620 if (WARN_ON(!cbss)) 8621 return; 8622 8623 bss = (void *)cbss->priv; 8624 8625 sband = local->hw.wiphy->bands[cbss->channel->band]; 8626 if (WARN_ON(!sband)) 8627 return; 8628 8629 link = sdata_dereference(sdata->link[link_id], sdata); 8630 if (WARN_ON(!link)) 8631 return; 8632 8633 /* for MLO connections assume advertising all rates is OK */ 8634 if (!req->ap_mld_addr) { 8635 assoc_data->supp_rates = bss->supp_rates; 8636 assoc_data->supp_rates_len = bss->supp_rates_len; 8637 } 8638 8639 /* copy and link elems for the STA profile */ 8640 if (req->links[link_id].elems_len) { 8641 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 8642 req->links[link_id].elems_len); 8643 assoc_data->link[link_id].elems = assoc_data->ie_pos; 8644 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 8645 assoc_data->ie_pos += req->links[link_id].elems_len; 8646 } 8647 8648 link->u.mgd.beacon_crc_valid = false; 8649 link->u.mgd.dtim_period = 0; 8650 link->u.mgd.have_beacon = false; 8651 8652 /* override HT configuration only if the AP and we support it */ 8653 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 8654 struct ieee80211_sta_ht_cap sta_ht_cap; 8655 8656 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 8657 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 8658 } 8659 8660 rcu_read_lock(); 8661 bss_ies = rcu_dereference(cbss->beacon_ies); 8662 if (bss_ies) { 8663 u8 dtim_count = 0; 8664 8665 ieee80211_get_dtim(bss_ies, &dtim_count, 8666 &link->u.mgd.dtim_period); 8667 8668 sdata->deflink.u.mgd.have_beacon = true; 8669 8670 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 8671 link->conf->sync_tsf = bss_ies->tsf; 8672 link->conf->sync_device_ts = bss->device_ts_beacon; 8673 link->conf->sync_dtim_count = dtim_count; 8674 } 8675 } else { 8676 bss_ies = rcu_dereference(cbss->ies); 8677 } 8678 8679 if (bss_ies) { 8680 const struct element *elem; 8681 8682 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 8683 bss_ies->data, bss_ies->len); 8684 if (elem && elem->datalen >= 3) 8685 link->conf->profile_periodicity = elem->data[2]; 8686 else 8687 link->conf->profile_periodicity = 0; 8688 8689 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 8690 bss_ies->data, bss_ies->len); 8691 if (elem && elem->datalen >= 11 && 8692 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 8693 link->conf->ema_ap = true; 8694 else 8695 link->conf->ema_ap = false; 8696 } 8697 rcu_read_unlock(); 8698 8699 if (bss->corrupt_data) { 8700 char *corrupt_type = "data"; 8701 8702 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 8703 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 8704 corrupt_type = "beacon and probe response"; 8705 else 8706 corrupt_type = "beacon"; 8707 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 8708 corrupt_type = "probe response"; 8709 } 8710 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 8711 cbss->bssid, corrupt_type); 8712 } 8713 8714 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 8715 if (sdata->u.mgd.powersave) 8716 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 8717 else 8718 link->smps_mode = IEEE80211_SMPS_OFF; 8719 } else { 8720 link->smps_mode = link->u.mgd.req_smps; 8721 } 8722 } 8723 8724 static int 8725 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 8726 struct ieee80211_mgd_assoc_data *assoc_data, 8727 int link_id) 8728 { 8729 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 8730 enum nl80211_band band = cbss->channel->band; 8731 struct ieee80211_supported_band *sband; 8732 const struct element *elem; 8733 int err; 8734 8735 /* neither HT nor VHT elements used on 6 GHz */ 8736 if (band == NL80211_BAND_6GHZ) 8737 return 0; 8738 8739 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 8740 return 0; 8741 8742 rcu_read_lock(); 8743 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 8744 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 8745 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 8746 cbss->bssid); 8747 err = -EINVAL; 8748 goto out_rcu; 8749 } 8750 assoc_data->link[link_id].ap_ht_param = 8751 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 8752 rcu_read_unlock(); 8753 8754 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 8755 return 0; 8756 8757 /* some drivers want to support VHT on 2.4 GHz even */ 8758 sband = sdata->local->hw.wiphy->bands[band]; 8759 if (!sband->vht_cap.vht_supported) 8760 return 0; 8761 8762 rcu_read_lock(); 8763 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 8764 /* but even then accept it not being present on the AP */ 8765 if (!elem && band == NL80211_BAND_2GHZ) { 8766 err = 0; 8767 goto out_rcu; 8768 } 8769 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 8770 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 8771 cbss->bssid); 8772 err = -EINVAL; 8773 goto out_rcu; 8774 } 8775 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 8776 sizeof(struct ieee80211_vht_cap)); 8777 rcu_read_unlock(); 8778 8779 return 0; 8780 out_rcu: 8781 rcu_read_unlock(); 8782 return err; 8783 } 8784 8785 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 8786 struct cfg80211_assoc_request *req) 8787 { 8788 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 8789 struct ieee80211_local *local = sdata->local; 8790 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8791 struct ieee80211_mgd_assoc_data *assoc_data; 8792 const struct element *ssid_elem; 8793 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 8794 struct ieee80211_link_data *link; 8795 struct cfg80211_bss *cbss; 8796 bool override, uapsd_supported; 8797 bool match_auth; 8798 int i, err; 8799 size_t size = sizeof(*assoc_data) + req->ie_len; 8800 8801 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 8802 size += req->links[i].elems_len; 8803 8804 /* FIXME: no support for 4-addr MLO yet */ 8805 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 8806 return -EOPNOTSUPP; 8807 8808 assoc_data = kzalloc(size, GFP_KERNEL); 8809 if (!assoc_data) 8810 return -ENOMEM; 8811 8812 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 8813 8814 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 8815 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 8816 err = -EINVAL; 8817 goto err_free; 8818 } 8819 8820 rcu_read_lock(); 8821 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 8822 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 8823 rcu_read_unlock(); 8824 err = -EINVAL; 8825 goto err_free; 8826 } 8827 8828 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 8829 assoc_data->ssid_len = ssid_elem->datalen; 8830 rcu_read_unlock(); 8831 8832 if (req->ap_mld_addr) 8833 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 8834 else 8835 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 8836 8837 if (ifmgd->associated) { 8838 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8839 8840 sdata_info(sdata, 8841 "disconnect from AP %pM for new assoc to %pM\n", 8842 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 8843 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8844 WLAN_REASON_UNSPECIFIED, 8845 false, frame_buf); 8846 8847 ieee80211_report_disconnect(sdata, frame_buf, 8848 sizeof(frame_buf), true, 8849 WLAN_REASON_UNSPECIFIED, 8850 false); 8851 } 8852 8853 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 8854 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 8855 sizeof(ifmgd->ht_capa_mask)); 8856 8857 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 8858 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 8859 sizeof(ifmgd->vht_capa_mask)); 8860 8861 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 8862 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 8863 sizeof(ifmgd->s1g_capa_mask)); 8864 8865 /* keep some setup (AP STA, channel, ...) if matching */ 8866 match_auth = ifmgd->auth_data && 8867 ether_addr_equal(ifmgd->auth_data->ap_addr, 8868 assoc_data->ap_addr) && 8869 ifmgd->auth_data->link_id == req->link_id; 8870 8871 if (req->ap_mld_addr) { 8872 uapsd_supported = true; 8873 8874 if (req->flags & (ASSOC_REQ_DISABLE_HT | 8875 ASSOC_REQ_DISABLE_VHT | 8876 ASSOC_REQ_DISABLE_HE | 8877 ASSOC_REQ_DISABLE_EHT)) { 8878 err = -EINVAL; 8879 goto err_free; 8880 } 8881 8882 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 8883 struct ieee80211_supported_band *sband; 8884 struct cfg80211_bss *link_cbss = req->links[i].bss; 8885 struct ieee80211_bss *bss; 8886 8887 if (!link_cbss) 8888 continue; 8889 8890 bss = (void *)link_cbss->priv; 8891 8892 if (!bss->wmm_used) { 8893 err = -EINVAL; 8894 req->links[i].error = err; 8895 goto err_free; 8896 } 8897 8898 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 8899 err = -EINVAL; 8900 req->links[i].error = err; 8901 goto err_free; 8902 } 8903 8904 link = sdata_dereference(sdata->link[i], sdata); 8905 if (link) 8906 ether_addr_copy(assoc_data->link[i].addr, 8907 link->conf->addr); 8908 else 8909 eth_random_addr(assoc_data->link[i].addr); 8910 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 8911 8912 if (match_auth && i == assoc_link_id && link) 8913 assoc_data->link[i].conn = link->u.mgd.conn; 8914 else 8915 assoc_data->link[i].conn = 8916 ieee80211_conn_settings_unlimited; 8917 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 8918 req, true, i, 8919 &assoc_data->link[i].conn); 8920 assoc_data->link[i].bss = link_cbss; 8921 assoc_data->link[i].disabled = req->links[i].disabled; 8922 8923 if (!bss->uapsd_supported) 8924 uapsd_supported = false; 8925 8926 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 8927 err = -EINVAL; 8928 req->links[i].error = err; 8929 goto err_free; 8930 } 8931 8932 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 8933 assoc_data, i); 8934 if (err) { 8935 err = -EINVAL; 8936 req->links[i].error = err; 8937 goto err_free; 8938 } 8939 } 8940 8941 assoc_data->wmm = true; 8942 } else { 8943 struct ieee80211_supported_band *sband; 8944 struct ieee80211_bss *bss = (void *)cbss->priv; 8945 8946 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 8947 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 8948 8949 assoc_data->wmm = bss->wmm_used && 8950 (local->hw.queues >= IEEE80211_NUM_ACS); 8951 8952 if (cbss->channel->band == NL80211_BAND_6GHZ && 8953 req->flags & (ASSOC_REQ_DISABLE_HT | 8954 ASSOC_REQ_DISABLE_VHT | 8955 ASSOC_REQ_DISABLE_HE)) { 8956 err = -EINVAL; 8957 goto err_free; 8958 } 8959 8960 sband = local->hw.wiphy->bands[cbss->channel->band]; 8961 8962 assoc_data->link[0].bss = cbss; 8963 8964 if (match_auth) 8965 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 8966 else 8967 assoc_data->link[0].conn = 8968 ieee80211_conn_settings_unlimited; 8969 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 8970 assoc_data->wmm, 0, 8971 &assoc_data->link[0].conn); 8972 8973 uapsd_supported = bss->uapsd_supported; 8974 8975 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 8976 if (err) 8977 goto err_free; 8978 } 8979 8980 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 8981 8982 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 8983 err = -EBUSY; 8984 goto err_free; 8985 } 8986 8987 if (ifmgd->assoc_data) { 8988 err = -EBUSY; 8989 goto err_free; 8990 } 8991 8992 /* Cleanup is delayed if auth_data matches */ 8993 if (ifmgd->auth_data && !match_auth) 8994 ieee80211_destroy_auth_data(sdata, false); 8995 8996 if (req->ie && req->ie_len) { 8997 memcpy(assoc_data->ie, req->ie, req->ie_len); 8998 assoc_data->ie_len = req->ie_len; 8999 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9000 } else { 9001 assoc_data->ie_pos = assoc_data->ie; 9002 } 9003 9004 if (req->fils_kek) { 9005 /* should already be checked in cfg80211 - so warn */ 9006 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9007 err = -EINVAL; 9008 goto err_free; 9009 } 9010 memcpy(assoc_data->fils_kek, req->fils_kek, 9011 req->fils_kek_len); 9012 assoc_data->fils_kek_len = req->fils_kek_len; 9013 } 9014 9015 if (req->fils_nonces) 9016 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9017 2 * FILS_NONCE_LEN); 9018 9019 /* default timeout */ 9020 assoc_data->timeout = jiffies; 9021 assoc_data->timeout_started = true; 9022 9023 assoc_data->assoc_link_id = assoc_link_id; 9024 9025 if (req->ap_mld_addr) { 9026 /* if there was no authentication, set up the link */ 9027 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9028 if (err) 9029 goto err_clear; 9030 } 9031 9032 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9033 if (WARN_ON(!link)) { 9034 err = -EINVAL; 9035 goto err_clear; 9036 } 9037 9038 override = link->u.mgd.conn.mode != 9039 assoc_data->link[assoc_link_id].conn.mode || 9040 link->u.mgd.conn.bw_limit != 9041 assoc_data->link[assoc_link_id].conn.bw_limit; 9042 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9043 9044 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9045 assoc_link_id); 9046 9047 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9048 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9049 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9050 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9051 9052 if (assoc_data->wmm && uapsd_supported && 9053 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9054 assoc_data->uapsd = true; 9055 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9056 } else { 9057 assoc_data->uapsd = false; 9058 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9059 } 9060 9061 if (req->prev_bssid) 9062 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9063 9064 if (req->use_mfp) { 9065 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9066 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9067 } else { 9068 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9069 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9070 } 9071 9072 if (req->flags & ASSOC_REQ_USE_RRM) 9073 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9074 else 9075 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9076 9077 if (req->crypto.control_port) 9078 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9079 else 9080 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9081 9082 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9083 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9084 sdata->control_port_over_nl80211 = 9085 req->crypto.control_port_over_nl80211; 9086 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9087 9088 /* kick off associate process */ 9089 ifmgd->assoc_data = assoc_data; 9090 9091 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9092 if (!assoc_data->link[i].bss) 9093 continue; 9094 if (i == assoc_data->assoc_link_id) 9095 continue; 9096 /* only calculate the mode, hence link == NULL */ 9097 err = ieee80211_prep_channel(sdata, NULL, i, 9098 assoc_data->link[i].bss, true, 9099 &assoc_data->link[i].conn); 9100 if (err) { 9101 req->links[i].error = err; 9102 goto err_clear; 9103 } 9104 } 9105 9106 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9107 vif_cfg->ssid_len = assoc_data->ssid_len; 9108 9109 /* needed for transmitting the assoc frames properly */ 9110 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9111 9112 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9113 req->ap_mld_addr, true, 9114 &assoc_data->link[assoc_link_id].conn, 9115 override); 9116 if (err) 9117 goto err_clear; 9118 9119 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9120 const struct cfg80211_bss_ies *beacon_ies; 9121 9122 rcu_read_lock(); 9123 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9124 if (!beacon_ies) { 9125 /* 9126 * Wait up to one beacon interval ... 9127 * should this be more if we miss one? 9128 */ 9129 sdata_info(sdata, "waiting for beacon from %pM\n", 9130 link->u.mgd.bssid); 9131 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9132 assoc_data->timeout_started = true; 9133 assoc_data->need_beacon = true; 9134 } 9135 rcu_read_unlock(); 9136 } 9137 9138 run_again(sdata, assoc_data->timeout); 9139 9140 /* We are associating, clean up auth_data */ 9141 if (ifmgd->auth_data) 9142 ieee80211_destroy_auth_data(sdata, true); 9143 9144 return 0; 9145 err_clear: 9146 if (!ifmgd->auth_data) { 9147 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9148 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9149 BSS_CHANGED_BSSID); 9150 } 9151 ifmgd->assoc_data = NULL; 9152 err_free: 9153 kfree(assoc_data); 9154 return err; 9155 } 9156 9157 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9158 struct cfg80211_deauth_request *req) 9159 { 9160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9161 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9162 bool tx = !req->local_state_change; 9163 struct ieee80211_prep_tx_info info = { 9164 .subtype = IEEE80211_STYPE_DEAUTH, 9165 }; 9166 9167 if (ifmgd->auth_data && 9168 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9169 sdata_info(sdata, 9170 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9171 req->bssid, req->reason_code, 9172 ieee80211_get_reason_code_string(req->reason_code)); 9173 9174 info.link_id = ifmgd->auth_data->link_id; 9175 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9176 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9177 IEEE80211_STYPE_DEAUTH, 9178 req->reason_code, tx, 9179 frame_buf); 9180 ieee80211_destroy_auth_data(sdata, false); 9181 ieee80211_report_disconnect(sdata, frame_buf, 9182 sizeof(frame_buf), true, 9183 req->reason_code, false); 9184 drv_mgd_complete_tx(sdata->local, sdata, &info); 9185 return 0; 9186 } 9187 9188 if (ifmgd->assoc_data && 9189 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 9190 sdata_info(sdata, 9191 "aborting association with %pM by local choice (Reason: %u=%s)\n", 9192 req->bssid, req->reason_code, 9193 ieee80211_get_reason_code_string(req->reason_code)); 9194 9195 info.link_id = ifmgd->assoc_data->assoc_link_id; 9196 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9197 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9198 IEEE80211_STYPE_DEAUTH, 9199 req->reason_code, tx, 9200 frame_buf); 9201 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9202 ieee80211_report_disconnect(sdata, frame_buf, 9203 sizeof(frame_buf), true, 9204 req->reason_code, false); 9205 drv_mgd_complete_tx(sdata->local, sdata, &info); 9206 return 0; 9207 } 9208 9209 if (ifmgd->associated && 9210 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 9211 sdata_info(sdata, 9212 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 9213 req->bssid, req->reason_code, 9214 ieee80211_get_reason_code_string(req->reason_code)); 9215 9216 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9217 req->reason_code, tx, frame_buf); 9218 ieee80211_report_disconnect(sdata, frame_buf, 9219 sizeof(frame_buf), true, 9220 req->reason_code, false); 9221 drv_mgd_complete_tx(sdata->local, sdata, &info); 9222 return 0; 9223 } 9224 9225 return -ENOTCONN; 9226 } 9227 9228 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 9229 struct cfg80211_disassoc_request *req) 9230 { 9231 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9232 9233 if (!sdata->u.mgd.associated || 9234 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 9235 return -ENOTCONN; 9236 9237 sdata_info(sdata, 9238 "disassociating from %pM by local choice (Reason: %u=%s)\n", 9239 req->ap_addr, req->reason_code, 9240 ieee80211_get_reason_code_string(req->reason_code)); 9241 9242 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 9243 req->reason_code, !req->local_state_change, 9244 frame_buf); 9245 9246 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 9247 req->reason_code, false); 9248 9249 return 0; 9250 } 9251 9252 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 9253 { 9254 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9255 &link->u.mgd.request_smps_work); 9256 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9257 &link->u.mgd.recalc_smps); 9258 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 9259 &link->u.mgd.csa.switch_work); 9260 } 9261 9262 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 9263 { 9264 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9265 9266 /* 9267 * Make sure some work items will not run after this, 9268 * they will not do anything but might not have been 9269 * cancelled when disconnecting. 9270 */ 9271 wiphy_work_cancel(sdata->local->hw.wiphy, 9272 &ifmgd->monitor_work); 9273 wiphy_work_cancel(sdata->local->hw.wiphy, 9274 &ifmgd->beacon_connection_loss_work); 9275 wiphy_work_cancel(sdata->local->hw.wiphy, 9276 &ifmgd->csa_connection_drop_work); 9277 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 9278 &ifmgd->tdls_peer_del_work); 9279 9280 if (ifmgd->assoc_data) 9281 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 9282 if (ifmgd->auth_data) 9283 ieee80211_destroy_auth_data(sdata, false); 9284 spin_lock_bh(&ifmgd->teardown_lock); 9285 if (ifmgd->teardown_skb) { 9286 kfree_skb(ifmgd->teardown_skb); 9287 ifmgd->teardown_skb = NULL; 9288 ifmgd->orig_teardown_skb = NULL; 9289 } 9290 kfree(ifmgd->assoc_req_ies); 9291 ifmgd->assoc_req_ies = NULL; 9292 ifmgd->assoc_req_ies_len = 0; 9293 spin_unlock_bh(&ifmgd->teardown_lock); 9294 del_timer_sync(&ifmgd->timer); 9295 } 9296 9297 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 9298 enum nl80211_cqm_rssi_threshold_event rssi_event, 9299 s32 rssi_level, 9300 gfp_t gfp) 9301 { 9302 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9303 9304 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 9305 9306 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 9307 } 9308 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 9309 9310 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 9311 { 9312 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9313 9314 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 9315 9316 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 9317 } 9318 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 9319 9320 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 9321 int rssi_min_thold, 9322 int rssi_max_thold) 9323 { 9324 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 9325 9326 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 9327 return; 9328 9329 /* 9330 * Scale up threshold values before storing it, as the RSSI averaging 9331 * algorithm uses a scaled up value as well. Change this scaling 9332 * factor if the RSSI averaging algorithm changes. 9333 */ 9334 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 9335 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 9336 } 9337 9338 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 9339 int rssi_min_thold, 9340 int rssi_max_thold) 9341 { 9342 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9343 9344 WARN_ON(rssi_min_thold == rssi_max_thold || 9345 rssi_min_thold > rssi_max_thold); 9346 9347 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 9348 rssi_max_thold); 9349 } 9350 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 9351 9352 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 9353 { 9354 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9355 9356 _ieee80211_enable_rssi_reports(sdata, 0, 0); 9357 } 9358 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 9359