1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <[email protected]> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <[email protected]> 8 * Copyright 2007, Michael Wu <[email protected]> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2024 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <linux/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #include <kunit/static_stub.h> 35 36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 40 #define IEEE80211_AUTH_MAX_TRIES 3 41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 42 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 43 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 44 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 45 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 46 #define IEEE80211_ASSOC_MAX_TRIES 3 47 48 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100) 49 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 50 51 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 52 53 static int max_nullfunc_tries = 2; 54 module_param(max_nullfunc_tries, int, 0644); 55 MODULE_PARM_DESC(max_nullfunc_tries, 56 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 57 58 static int max_probe_tries = 5; 59 module_param(max_probe_tries, int, 0644); 60 MODULE_PARM_DESC(max_probe_tries, 61 "Maximum probe tries before disconnecting (reason 4)."); 62 63 /* 64 * Beacon loss timeout is calculated as N frames times the 65 * advertised beacon interval. This may need to be somewhat 66 * higher than what hardware might detect to account for 67 * delays in the host processing frames. But since we also 68 * probe on beacon miss before declaring the connection lost 69 * default to what we want. 70 */ 71 static int beacon_loss_count = 7; 72 module_param(beacon_loss_count, int, 0644); 73 MODULE_PARM_DESC(beacon_loss_count, 74 "Number of beacon intervals before we decide beacon was lost."); 75 76 /* 77 * Time the connection can be idle before we probe 78 * it to see if we can still talk to the AP. 79 */ 80 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 81 /* 82 * Time we wait for a probe response after sending 83 * a probe request because of beacon loss or for 84 * checking the connection still works. 85 */ 86 static int probe_wait_ms = 500; 87 module_param(probe_wait_ms, int, 0644); 88 MODULE_PARM_DESC(probe_wait_ms, 89 "Maximum time(ms) to wait for probe response" 90 " before disconnecting (reason 4)."); 91 92 /* 93 * How many Beacon frames need to have been used in average signal strength 94 * before starting to indicate signal change events. 95 */ 96 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 97 98 /* 99 * We can have multiple work items (and connection probing) 100 * scheduling this timer, but we need to take care to only 101 * reschedule it when it should fire _earlier_ than it was 102 * asked for before, or if it's not pending right now. This 103 * function ensures that. Note that it then is required to 104 * run this function for all timeouts after the first one 105 * has happened -- the work that runs from this timer will 106 * do that. 107 */ 108 static void run_again(struct ieee80211_sub_if_data *sdata, 109 unsigned long timeout) 110 { 111 lockdep_assert_wiphy(sdata->local->hw.wiphy); 112 113 if (!timer_pending(&sdata->u.mgd.timer) || 114 time_before(timeout, sdata->u.mgd.timer.expires)) 115 mod_timer(&sdata->u.mgd.timer, timeout); 116 } 117 118 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 119 { 120 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 121 return; 122 123 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 124 return; 125 126 mod_timer(&sdata->u.mgd.bcn_mon_timer, 127 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 128 } 129 130 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 131 { 132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 133 134 if (unlikely(!ifmgd->associated)) 135 return; 136 137 if (ifmgd->probe_send_count) 138 ifmgd->probe_send_count = 0; 139 140 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 141 return; 142 143 mod_timer(&ifmgd->conn_mon_timer, 144 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 145 } 146 147 static int ecw2cw(int ecw) 148 { 149 return (1 << ecw) - 1; 150 } 151 152 static enum ieee80211_conn_mode 153 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 154 struct ieee80211_channel *channel, 155 u32 vht_cap_info, 156 const struct ieee802_11_elems *elems, 157 bool ignore_ht_channel_mismatch, 158 const struct ieee80211_conn_settings *conn, 159 struct cfg80211_chan_def *chandef) 160 { 161 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 162 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 163 const struct ieee80211_he_operation *he_oper = elems->he_operation; 164 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 165 struct ieee80211_supported_band *sband = 166 sdata->local->hw.wiphy->bands[channel->band]; 167 struct cfg80211_chan_def vht_chandef; 168 bool no_vht = false; 169 u32 ht_cfreq; 170 171 *chandef = (struct cfg80211_chan_def) { 172 .chan = channel, 173 .width = NL80211_CHAN_WIDTH_20_NOHT, 174 .center_freq1 = channel->center_freq, 175 .freq1_offset = channel->freq_offset, 176 }; 177 178 /* get special S1G case out of the way */ 179 if (sband->band == NL80211_BAND_S1GHZ) { 180 if (!ieee80211_chandef_s1g_oper(elems->s1g_oper, chandef)) { 181 sdata_info(sdata, 182 "Missing S1G Operation Element? Trying operating == primary\n"); 183 chandef->width = ieee80211_s1g_channel_width(channel); 184 } 185 186 return IEEE80211_CONN_MODE_S1G; 187 } 188 189 /* get special 6 GHz case out of the way */ 190 if (sband->band == NL80211_BAND_6GHZ) { 191 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 192 193 /* this is an error */ 194 if (conn->mode < IEEE80211_CONN_MODE_HE) 195 return IEEE80211_CONN_MODE_LEGACY; 196 197 if (!elems->he_6ghz_capa || !elems->he_cap) { 198 sdata_info(sdata, 199 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 200 return IEEE80211_CONN_MODE_LEGACY; 201 } 202 203 if (!eht_oper || !elems->eht_cap) { 204 eht_oper = NULL; 205 mode = IEEE80211_CONN_MODE_HE; 206 } 207 208 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 209 eht_oper, chandef)) { 210 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 211 return IEEE80211_CONN_MODE_LEGACY; 212 } 213 214 return mode; 215 } 216 217 /* now we have the progression HT, VHT, ... */ 218 if (conn->mode < IEEE80211_CONN_MODE_HT) 219 return IEEE80211_CONN_MODE_LEGACY; 220 221 if (!ht_oper || !elems->ht_cap_elem) 222 return IEEE80211_CONN_MODE_LEGACY; 223 224 chandef->width = NL80211_CHAN_WIDTH_20; 225 226 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 227 channel->band); 228 /* check that channel matches the right operating channel */ 229 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 230 /* 231 * It's possible that some APs are confused here; 232 * Netgear WNDR3700 sometimes reports 4 higher than 233 * the actual channel in association responses, but 234 * since we look at probe response/beacon data here 235 * it should be OK. 236 */ 237 sdata_info(sdata, 238 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 239 channel->center_freq, ht_cfreq, 240 ht_oper->primary_chan, channel->band); 241 return IEEE80211_CONN_MODE_LEGACY; 242 } 243 244 ieee80211_chandef_ht_oper(ht_oper, chandef); 245 246 if (conn->mode < IEEE80211_CONN_MODE_VHT) 247 return IEEE80211_CONN_MODE_HT; 248 249 vht_chandef = *chandef; 250 251 /* 252 * having he_cap/he_oper parsed out implies we're at 253 * least operating as HE STA 254 */ 255 if (elems->he_cap && he_oper && 256 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 257 struct ieee80211_vht_operation he_oper_vht_cap; 258 259 /* 260 * Set only first 3 bytes (other 2 aren't used in 261 * ieee80211_chandef_vht_oper() anyway) 262 */ 263 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 264 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 265 266 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 267 &he_oper_vht_cap, ht_oper, 268 &vht_chandef)) { 269 sdata_info(sdata, 270 "HE AP VHT information is invalid, disabling HE\n"); 271 /* this will cause us to re-parse as VHT STA */ 272 return IEEE80211_CONN_MODE_VHT; 273 } 274 } else if (!vht_oper || !elems->vht_cap_elem) { 275 if (sband->band == NL80211_BAND_5GHZ) { 276 sdata_info(sdata, 277 "VHT information is missing, disabling VHT\n"); 278 return IEEE80211_CONN_MODE_HT; 279 } 280 no_vht = true; 281 } else if (sband->band == NL80211_BAND_2GHZ) { 282 no_vht = true; 283 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 284 vht_cap_info, 285 vht_oper, ht_oper, 286 &vht_chandef)) { 287 sdata_info(sdata, 288 "AP VHT information is invalid, disabling VHT\n"); 289 return IEEE80211_CONN_MODE_HT; 290 } 291 292 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 293 sdata_info(sdata, 294 "AP VHT information doesn't match HT, disabling VHT\n"); 295 return IEEE80211_CONN_MODE_HT; 296 } 297 298 *chandef = vht_chandef; 299 300 /* stick to current max mode if we or the AP don't have HE */ 301 if (conn->mode < IEEE80211_CONN_MODE_HE || 302 !elems->he_operation || !elems->he_cap) { 303 if (no_vht) 304 return IEEE80211_CONN_MODE_HT; 305 return IEEE80211_CONN_MODE_VHT; 306 } 307 308 /* stick to HE if we or the AP don't have EHT */ 309 if (conn->mode < IEEE80211_CONN_MODE_EHT || 310 !eht_oper || !elems->eht_cap) 311 return IEEE80211_CONN_MODE_HE; 312 313 /* 314 * handle the case that the EHT operation indicates that it holds EHT 315 * operation information (in case that the channel width differs from 316 * the channel width reported in HT/VHT/HE). 317 */ 318 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 319 struct cfg80211_chan_def eht_chandef = *chandef; 320 321 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 322 &eht_chandef); 323 324 eht_chandef.punctured = 325 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 326 327 if (!cfg80211_chandef_valid(&eht_chandef)) { 328 sdata_info(sdata, 329 "AP EHT information is invalid, disabling EHT\n"); 330 return IEEE80211_CONN_MODE_HE; 331 } 332 333 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 334 sdata_info(sdata, 335 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 336 return IEEE80211_CONN_MODE_HE; 337 } 338 339 *chandef = eht_chandef; 340 } 341 342 return IEEE80211_CONN_MODE_EHT; 343 } 344 345 static bool 346 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 347 const struct ieee80211_he_cap_elem *he_cap, 348 const struct ieee80211_he_operation *he_op) 349 { 350 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 351 u16 mcs_80_map_tx, mcs_80_map_rx; 352 u16 ap_min_req_set; 353 int nss; 354 355 if (!he_cap) 356 return false; 357 358 /* mcs_nss is right after he_cap info */ 359 he_mcs_nss_supp = (void *)(he_cap + 1); 360 361 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 362 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 363 364 /* P802.11-REVme/D0.3 365 * 27.1.1 Introduction to the HE PHY 366 * ... 367 * An HE STA shall support the following features: 368 * ... 369 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 370 * supported channel widths for HE SU PPDUs 371 */ 372 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 373 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 374 sdata_info(sdata, 375 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 376 mcs_80_map_tx, mcs_80_map_rx); 377 return false; 378 } 379 380 if (!he_op) 381 return true; 382 383 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 384 385 /* 386 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 387 * zeroes, which is nonsense, and completely inconsistent with itself 388 * (it doesn't have 8 streams). Accept the settings in this case anyway. 389 */ 390 if (!ap_min_req_set) 391 return true; 392 393 /* make sure the AP is consistent with itself 394 * 395 * P802.11-REVme/D0.3 396 * 26.17.1 Basic HE BSS operation 397 * 398 * A STA that is operating in an HE BSS shall be able to receive and 399 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 400 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 401 * MLME-START.request primitive and shall be able to receive at each of 402 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 403 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 404 * primitive 405 */ 406 for (nss = 8; nss > 0; nss--) { 407 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 408 u8 ap_rx_val; 409 u8 ap_tx_val; 410 411 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 412 continue; 413 414 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 415 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 416 417 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 418 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 419 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 420 sdata_info(sdata, 421 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 422 nss, ap_rx_val, ap_rx_val, ap_op_val); 423 return false; 424 } 425 } 426 427 return true; 428 } 429 430 static bool 431 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 432 struct ieee80211_supported_band *sband, 433 const struct ieee80211_he_operation *he_op) 434 { 435 const struct ieee80211_sta_he_cap *sta_he_cap = 436 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 437 u16 ap_min_req_set; 438 int i; 439 440 if (!sta_he_cap || !he_op) 441 return false; 442 443 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 444 445 /* 446 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 447 * zeroes, which is nonsense, and completely inconsistent with itself 448 * (it doesn't have 8 streams). Accept the settings in this case anyway. 449 */ 450 if (!ap_min_req_set) 451 return true; 452 453 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 454 for (i = 0; i < 3; i++) { 455 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 456 &sta_he_cap->he_mcs_nss_supp; 457 u16 sta_mcs_map_rx = 458 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 459 u16 sta_mcs_map_tx = 460 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 461 u8 nss; 462 bool verified = true; 463 464 /* 465 * For each band there is a maximum of 8 spatial streams 466 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 467 * of 2 bits per NSS (1-8), with the values defined in enum 468 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 469 * capabilities aren't less than the AP's minimum requirements 470 * for this HE BSS per SS. 471 * It is enough to find one such band that meets the reqs. 472 */ 473 for (nss = 8; nss > 0; nss--) { 474 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 475 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 476 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 477 478 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 479 continue; 480 481 /* 482 * Make sure the HE AP doesn't require MCSs that aren't 483 * supported by the client as required by spec 484 * 485 * P802.11-REVme/D0.3 486 * 26.17.1 Basic HE BSS operation 487 * 488 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 489 * a BSS, unless it supports (i.e., is able to both transmit and 490 * receive using) all of the <HE-MCS, NSS> tuples in the basic 491 * HE-MCS and NSS set. 492 */ 493 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 494 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 495 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 496 verified = false; 497 break; 498 } 499 } 500 501 if (verified) 502 return true; 503 } 504 505 /* If here, STA doesn't meet AP's HE min requirements */ 506 return false; 507 } 508 509 static u8 510 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 511 const struct ieee80211_sta_eht_cap *sta_eht_cap, 512 unsigned int idx, int bw) 513 { 514 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 515 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 516 517 /* handle us being a 20 MHz-only EHT STA - with four values 518 * for MCS 0-7, 8-9, 10-11, 12-13. 519 */ 520 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 521 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 522 523 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 524 if (idx > 0) 525 idx--; 526 527 switch (bw) { 528 case 0: 529 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 530 case 1: 531 if (!(he_phy_cap0 & 532 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 533 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 534 return 0xff; /* pass check */ 535 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 536 case 2: 537 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 538 return 0xff; /* pass check */ 539 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 540 } 541 542 WARN_ON(1); 543 return 0; 544 } 545 546 static bool 547 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 548 struct ieee80211_supported_band *sband, 549 const struct ieee80211_eht_operation *eht_op) 550 { 551 const struct ieee80211_sta_he_cap *sta_he_cap = 552 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 553 const struct ieee80211_sta_eht_cap *sta_eht_cap = 554 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 555 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 556 unsigned int i; 557 558 if (!sta_he_cap || !sta_eht_cap || !eht_op) 559 return false; 560 561 req = &eht_op->basic_mcs_nss; 562 563 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 564 u8 req_rx_nss, req_tx_nss; 565 unsigned int bw; 566 567 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 568 IEEE80211_EHT_MCS_NSS_RX); 569 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 570 IEEE80211_EHT_MCS_NSS_TX); 571 572 for (bw = 0; bw < 3; bw++) { 573 u8 have, have_rx_nss, have_tx_nss; 574 575 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 576 sta_eht_cap, 577 i, bw); 578 have_rx_nss = u8_get_bits(have, 579 IEEE80211_EHT_MCS_NSS_RX); 580 have_tx_nss = u8_get_bits(have, 581 IEEE80211_EHT_MCS_NSS_TX); 582 583 if (req_rx_nss > have_rx_nss || 584 req_tx_nss > have_tx_nss) 585 return false; 586 } 587 } 588 589 return true; 590 } 591 592 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 593 const struct cfg80211_chan_def *chandef, 594 u32 prohibited_flags) 595 { 596 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 597 chandef, prohibited_flags)) 598 return false; 599 600 if (chandef->punctured && 601 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 602 return false; 603 604 if (chandef->punctured && chandef->chan->band == NL80211_BAND_5GHZ && 605 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING_5GHZ)) 606 return false; 607 608 return true; 609 } 610 611 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 612 { 613 if (c->width == NL80211_CHAN_WIDTH_80P80) 614 return 4 + 4; 615 616 return nl80211_chan_width_to_mhz(c->width) / 20; 617 } 618 619 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 620 { 621 switch (c->width) { 622 case NL80211_CHAN_WIDTH_20: 623 case NL80211_CHAN_WIDTH_20_NOHT: 624 return 1; 625 case NL80211_CHAN_WIDTH_40: 626 return 2; 627 case NL80211_CHAN_WIDTH_80P80: 628 case NL80211_CHAN_WIDTH_80: 629 return 3; 630 case NL80211_CHAN_WIDTH_160: 631 return 4; 632 case NL80211_CHAN_WIDTH_320: 633 return 5; 634 default: 635 WARN_ON(1); 636 return 0; 637 } 638 } 639 640 VISIBLE_IF_MAC80211_KUNIT int 641 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 642 u8 n_partial_subchans) 643 { 644 int n = ieee80211_chandef_num_subchans(ap); 645 struct cfg80211_chan_def tmp = *ap; 646 int offset = 0; 647 648 /* 649 * Given a chandef (in this context, it's the AP's) and a number 650 * of subchannels that we want to look at ('n_partial_subchans'), 651 * calculate the offset in number of subchannels between the full 652 * and the subset with the desired width. 653 */ 654 655 /* same number of subchannels means no offset, obviously */ 656 if (n == n_partial_subchans) 657 return 0; 658 659 /* don't WARN - misconfigured APs could cause this if their N > width */ 660 if (n < n_partial_subchans) 661 return 0; 662 663 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 664 u32 prev = tmp.center_freq1; 665 666 ieee80211_chandef_downgrade(&tmp, NULL); 667 668 /* 669 * if center_freq moved up, half the original channels 670 * are gone now but were below, so increase offset 671 */ 672 if (prev < tmp.center_freq1) 673 offset += ieee80211_chandef_num_subchans(&tmp); 674 } 675 676 /* 677 * 80+80 with secondary 80 below primary - four subchannels for it 678 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 679 */ 680 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 681 ap->center_freq2 < ap->center_freq1) 682 offset += 4; 683 684 return offset; 685 } 686 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 687 688 VISIBLE_IF_MAC80211_KUNIT void 689 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 690 const struct cfg80211_chan_def *ap, 691 const struct cfg80211_chan_def *used) 692 { 693 u8 needed = ieee80211_chandef_num_subchans(used); 694 u8 have = ieee80211_chandef_num_subchans(ap); 695 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 696 u8 offset; 697 698 if (!psd->valid) 699 return; 700 701 /* if N is zero, all defaults were used, no point in rearranging */ 702 if (!psd->n) 703 goto out; 704 705 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 706 707 /* 708 * This assumes that 'N' is consistent with the HE channel, as 709 * it should be (otherwise the AP is broken). 710 * 711 * In psd->power we have values in the order 0..N, 0..K, where 712 * N+K should cover the entire channel per 'ap', but even if it 713 * doesn't then we've pre-filled 'unlimited' as defaults. 714 * 715 * But this is all the wrong order, we want to have them in the 716 * order of the 'used' channel. 717 * 718 * So for example, we could have a 320 MHz EHT AP, which has the 719 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 720 * seem to be considered for the TPE), as follows: 721 * 722 * EHT 320: | | | | | | | | | | | | | | | | | 723 * HE 80: | | | | | 724 * used 160: | | | | | | | | | 725 * 726 * N entries: |--|--|--|--| 727 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 728 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 729 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 730 * used chan: 0 1 2 3 4 5 6 7 731 * 732 * The idx in the power array ('power idx') is like this since it 733 * comes directly from the element's N and K entries in their 734 * element order, and those are this way for HE compatibility. 735 * 736 * Rearrange them as desired here, first by putting them into the 737 * 'full chan' order, and then selecting the necessary subset for 738 * the 'used chan'. 739 */ 740 741 /* first reorder according to AP channel */ 742 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 743 for (int i = 0; i < have; i++) { 744 if (i < offset) 745 tmp[i] = psd->power[i + psd->n]; 746 else if (i < offset + psd->n) 747 tmp[i] = psd->power[i - offset]; 748 else 749 tmp[i] = psd->power[i]; 750 } 751 752 /* 753 * and then select the subset for the used channel 754 * (set everything to defaults first in case a driver is confused) 755 */ 756 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 757 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 758 for (int i = 0; i < needed; i++) 759 psd->power[i] = tmp[offset + i]; 760 761 out: 762 /* limit, but don't lie if there are defaults in the data */ 763 if (needed < psd->count) 764 psd->count = needed; 765 } 766 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 767 768 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 769 const struct cfg80211_chan_def *ap, 770 const struct cfg80211_chan_def *used) 771 { 772 /* ignore this completely for narrow/invalid channels */ 773 if (!ieee80211_chandef_num_subchans(ap) || 774 !ieee80211_chandef_num_subchans(used)) { 775 ieee80211_clear_tpe(tpe); 776 return; 777 } 778 779 for (int i = 0; i < 2; i++) { 780 int needed_pwr_count; 781 782 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 783 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 784 785 /* limit this to the widths we actually need */ 786 needed_pwr_count = ieee80211_chandef_num_widths(used); 787 if (needed_pwr_count < tpe->max_local[i].count) 788 tpe->max_local[i].count = needed_pwr_count; 789 if (needed_pwr_count < tpe->max_reg_client[i].count) 790 tpe->max_reg_client[i].count = needed_pwr_count; 791 } 792 } 793 794 /* 795 * The AP part of the channel request is used to distinguish settings 796 * to the device used for wider bandwidth OFDMA. This is used in the 797 * channel context code to assign two channel contexts even if they're 798 * both for the same channel, if the AP bandwidths are incompatible. 799 * If not EHT (or driver override) then ap.chan == NULL indicates that 800 * there's no wider BW OFDMA used. 801 */ 802 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 803 struct ieee80211_chan_req *chanreq, 804 struct ieee80211_conn_settings *conn, 805 struct cfg80211_chan_def *ap_chandef) 806 { 807 chanreq->ap.chan = NULL; 808 809 if (conn->mode < IEEE80211_CONN_MODE_EHT) 810 return; 811 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 812 return; 813 814 chanreq->ap = *ap_chandef; 815 } 816 817 static struct ieee802_11_elems * 818 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 819 struct ieee80211_conn_settings *conn, 820 struct cfg80211_bss *cbss, int link_id, 821 struct ieee80211_chan_req *chanreq, 822 struct cfg80211_chan_def *ap_chandef) 823 { 824 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 825 struct ieee80211_bss *bss = (void *)cbss->priv; 826 struct ieee80211_channel *channel = cbss->channel; 827 struct ieee80211_elems_parse_params parse_params = { 828 .link_id = -1, 829 .from_ap = true, 830 .start = ies->data, 831 .len = ies->len, 832 }; 833 struct ieee802_11_elems *elems; 834 struct ieee80211_supported_band *sband; 835 enum ieee80211_conn_mode ap_mode; 836 int ret; 837 838 again: 839 parse_params.mode = conn->mode; 840 elems = ieee802_11_parse_elems_full(&parse_params); 841 if (!elems) 842 return ERR_PTR(-ENOMEM); 843 844 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 845 elems, false, conn, ap_chandef); 846 847 /* this should be impossible since parsing depends on our mode */ 848 if (WARN_ON(ap_mode > conn->mode)) { 849 ret = -EINVAL; 850 goto free; 851 } 852 853 if (conn->mode != ap_mode) { 854 conn->mode = ap_mode; 855 kfree(elems); 856 goto again; 857 } 858 859 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 860 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 861 862 sband = sdata->local->hw.wiphy->bands[channel->band]; 863 864 switch (channel->band) { 865 case NL80211_BAND_S1GHZ: 866 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 867 ret = -EINVAL; 868 goto free; 869 } 870 return elems; 871 case NL80211_BAND_6GHZ: 872 if (ap_mode < IEEE80211_CONN_MODE_HE) { 873 sdata_info(sdata, 874 "Rejecting non-HE 6/7 GHz connection"); 875 ret = -EINVAL; 876 goto free; 877 } 878 break; 879 default: 880 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 881 ret = -EINVAL; 882 goto free; 883 } 884 } 885 886 switch (ap_mode) { 887 case IEEE80211_CONN_MODE_S1G: 888 WARN_ON(1); 889 ret = -EINVAL; 890 goto free; 891 case IEEE80211_CONN_MODE_LEGACY: 892 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 893 break; 894 case IEEE80211_CONN_MODE_HT: 895 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 896 conn->bw_limit, 897 IEEE80211_CONN_BW_LIMIT_40); 898 break; 899 case IEEE80211_CONN_MODE_VHT: 900 case IEEE80211_CONN_MODE_HE: 901 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 902 conn->bw_limit, 903 IEEE80211_CONN_BW_LIMIT_160); 904 break; 905 case IEEE80211_CONN_MODE_EHT: 906 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 907 conn->bw_limit, 908 IEEE80211_CONN_BW_LIMIT_320); 909 break; 910 } 911 912 chanreq->oper = *ap_chandef; 913 914 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 915 916 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 917 IEEE80211_CHAN_DISABLED)) { 918 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 919 ret = -EINVAL; 920 goto free; 921 } 922 923 ieee80211_chanreq_downgrade(chanreq, conn); 924 } 925 926 if (conn->mode >= IEEE80211_CONN_MODE_HE && 927 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 928 IEEE80211_CHAN_NO_HE)) { 929 conn->mode = IEEE80211_CONN_MODE_VHT; 930 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 931 conn->bw_limit, 932 IEEE80211_CONN_BW_LIMIT_160); 933 } 934 935 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 936 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 937 IEEE80211_CHAN_NO_EHT)) { 938 conn->mode = IEEE80211_CONN_MODE_HE; 939 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 940 conn->bw_limit, 941 IEEE80211_CONN_BW_LIMIT_160); 942 } 943 944 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 945 sdata_info(sdata, 946 "regulatory prevented using AP config, downgraded\n"); 947 948 if (conn->mode >= IEEE80211_CONN_MODE_HE && 949 (!ieee80211_verify_peer_he_mcs_support(sdata, (void *)elems->he_cap, 950 elems->he_operation) || 951 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 952 elems->he_operation))) { 953 conn->mode = IEEE80211_CONN_MODE_VHT; 954 sdata_info(sdata, "required MCSes not supported, disabling HE\n"); 955 } 956 957 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 958 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 959 elems->eht_operation)) { 960 conn->mode = IEEE80211_CONN_MODE_HE; 961 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 962 conn->bw_limit, 963 IEEE80211_CONN_BW_LIMIT_160); 964 sdata_info(sdata, "required MCSes not supported, disabling EHT\n"); 965 } 966 967 /* the mode can only decrease, so this must terminate */ 968 if (ap_mode != conn->mode) { 969 kfree(elems); 970 goto again; 971 } 972 973 mlme_link_id_dbg(sdata, link_id, 974 "connecting with %s mode, max bandwidth %d MHz\n", 975 ieee80211_conn_mode_str(conn->mode), 976 20 * (1 << conn->bw_limit)); 977 978 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 979 ret = -EINVAL; 980 goto free; 981 } 982 983 return elems; 984 free: 985 kfree(elems); 986 return ERR_PTR(ret); 987 } 988 989 static int ieee80211_config_bw(struct ieee80211_link_data *link, 990 struct ieee802_11_elems *elems, 991 bool update, u64 *changed) 992 { 993 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 994 struct ieee80211_sub_if_data *sdata = link->sdata; 995 struct ieee80211_chan_req chanreq = {}; 996 struct cfg80211_chan_def ap_chandef; 997 enum ieee80211_conn_mode ap_mode; 998 u32 vht_cap_info = 0; 999 u16 ht_opmode; 1000 int ret; 1001 1002 /* don't track any bandwidth changes in legacy/S1G modes */ 1003 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1004 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1005 return 0; 1006 1007 if (elems->vht_cap_elem) 1008 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1009 1010 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1011 elems, true, &link->u.mgd.conn, 1012 &ap_chandef); 1013 1014 if (ap_mode != link->u.mgd.conn.mode) { 1015 link_info(link, 1016 "AP appears to change mode (expected %s, found %s), disconnect\n", 1017 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1018 ieee80211_conn_mode_str(ap_mode)); 1019 return -EINVAL; 1020 } 1021 1022 chanreq.oper = ap_chandef; 1023 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1024 &ap_chandef); 1025 1026 /* 1027 * if HT operation mode changed store the new one - 1028 * this may be applicable even if channel is identical 1029 */ 1030 if (elems->ht_operation) { 1031 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1032 if (link->conf->ht_operation_mode != ht_opmode) { 1033 *changed |= BSS_CHANGED_HT; 1034 link->conf->ht_operation_mode = ht_opmode; 1035 } 1036 } 1037 1038 /* 1039 * Downgrade the new channel if we associated with restricted 1040 * bandwidth capabilities. For example, if we associated as a 1041 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1042 * or config reasons) then switching to a 40 MHz channel now 1043 * won't do us any good -- we couldn't use it with the AP. 1044 */ 1045 while (link->u.mgd.conn.bw_limit < 1046 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1047 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1048 1049 if (ap_chandef.chan->band == NL80211_BAND_6GHZ && 1050 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1051 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1052 &chanreq.oper); 1053 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1054 link->conf->tpe = elems->tpe; 1055 *changed |= BSS_CHANGED_TPE; 1056 } 1057 } 1058 1059 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1060 return 0; 1061 1062 link_info(link, 1063 "AP %pM changed bandwidth, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1064 link->u.mgd.bssid, chanreq.oper.chan->center_freq, 1065 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1066 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1067 chanreq.oper.center_freq2); 1068 1069 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1070 sdata_info(sdata, 1071 "AP %pM changed caps/bw in a way we can't support - disconnect\n", 1072 link->u.mgd.bssid); 1073 return -EINVAL; 1074 } 1075 1076 if (!update) { 1077 link->conf->chanreq = chanreq; 1078 return 0; 1079 } 1080 1081 /* 1082 * We're tracking the current AP here, so don't do any further checks 1083 * here. This keeps us from playing ping-pong with regulatory, without 1084 * it the following can happen (for example): 1085 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1086 * - AP advertises regdom US 1087 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1088 * - we detect an unsupported channel and disconnect 1089 * - disconnect causes CRDA to reload world regdomain and the game 1090 * starts anew. 1091 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1092 * 1093 * It seems possible that there are still scenarios with CSA or real 1094 * bandwidth changes where a this could happen, but those cases are 1095 * less common and wouldn't completely prevent using the AP. 1096 */ 1097 1098 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1099 if (ret) { 1100 sdata_info(sdata, 1101 "AP %pM changed bandwidth to incompatible one - disconnect\n", 1102 link->u.mgd.bssid); 1103 return ret; 1104 } 1105 1106 cfg80211_schedule_channels_check(&sdata->wdev); 1107 return 0; 1108 } 1109 1110 /* frame sending functions */ 1111 1112 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1113 struct sk_buff *skb, u8 ap_ht_param, 1114 struct ieee80211_supported_band *sband, 1115 struct ieee80211_channel *channel, 1116 enum ieee80211_smps_mode smps, 1117 const struct ieee80211_conn_settings *conn) 1118 { 1119 u8 *pos; 1120 u32 flags = channel->flags; 1121 u16 cap; 1122 struct ieee80211_sta_ht_cap ht_cap; 1123 1124 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1125 1126 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1127 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1128 1129 /* determine capability flags */ 1130 cap = ht_cap.cap; 1131 1132 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1133 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1134 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1135 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1136 cap &= ~IEEE80211_HT_CAP_SGI_40; 1137 } 1138 break; 1139 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1140 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1141 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1142 cap &= ~IEEE80211_HT_CAP_SGI_40; 1143 } 1144 break; 1145 } 1146 1147 /* 1148 * If 40 MHz was disabled associate as though we weren't 1149 * capable of 40 MHz -- some broken APs will never fall 1150 * back to trying to transmit in 20 MHz. 1151 */ 1152 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1153 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1154 cap &= ~IEEE80211_HT_CAP_SGI_40; 1155 } 1156 1157 /* set SM PS mode properly */ 1158 cap &= ~IEEE80211_HT_CAP_SM_PS; 1159 switch (smps) { 1160 case IEEE80211_SMPS_AUTOMATIC: 1161 case IEEE80211_SMPS_NUM_MODES: 1162 WARN_ON(1); 1163 fallthrough; 1164 case IEEE80211_SMPS_OFF: 1165 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1166 IEEE80211_HT_CAP_SM_PS_SHIFT; 1167 break; 1168 case IEEE80211_SMPS_STATIC: 1169 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1170 IEEE80211_HT_CAP_SM_PS_SHIFT; 1171 break; 1172 case IEEE80211_SMPS_DYNAMIC: 1173 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1174 IEEE80211_HT_CAP_SM_PS_SHIFT; 1175 break; 1176 } 1177 1178 /* reserve and fill IE */ 1179 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1180 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1181 } 1182 1183 /* This function determines vht capability flags for the association 1184 * and builds the IE. 1185 * Note - the function returns true to own the MU-MIMO capability 1186 */ 1187 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1188 struct sk_buff *skb, 1189 struct ieee80211_supported_band *sband, 1190 struct ieee80211_vht_cap *ap_vht_cap, 1191 const struct ieee80211_conn_settings *conn) 1192 { 1193 struct ieee80211_local *local = sdata->local; 1194 u8 *pos; 1195 u32 cap; 1196 struct ieee80211_sta_vht_cap vht_cap; 1197 u32 mask, ap_bf_sts, our_bf_sts; 1198 bool mu_mimo_owner = false; 1199 1200 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1201 1202 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1203 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1204 1205 /* determine capability flags */ 1206 cap = vht_cap.cap; 1207 1208 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1209 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1210 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1211 } 1212 1213 /* 1214 * Some APs apparently get confused if our capabilities are better 1215 * than theirs, so restrict what we advertise in the assoc request. 1216 */ 1217 if (!(ap_vht_cap->vht_cap_info & 1218 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1219 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1220 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1221 else if (!(ap_vht_cap->vht_cap_info & 1222 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1223 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1224 1225 /* 1226 * If some other vif is using the MU-MIMO capability we cannot associate 1227 * using MU-MIMO - this will lead to contradictions in the group-id 1228 * mechanism. 1229 * Ownership is defined since association request, in order to avoid 1230 * simultaneous associations with MU-MIMO. 1231 */ 1232 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1233 bool disable_mu_mimo = false; 1234 struct ieee80211_sub_if_data *other; 1235 1236 list_for_each_entry(other, &local->interfaces, list) { 1237 if (other->vif.bss_conf.mu_mimo_owner) { 1238 disable_mu_mimo = true; 1239 break; 1240 } 1241 } 1242 if (disable_mu_mimo) 1243 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1244 else 1245 mu_mimo_owner = true; 1246 } 1247 1248 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1249 1250 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1251 our_bf_sts = cap & mask; 1252 1253 if (ap_bf_sts < our_bf_sts) { 1254 cap &= ~mask; 1255 cap |= ap_bf_sts; 1256 } 1257 1258 /* reserve and fill IE */ 1259 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1260 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1261 1262 return mu_mimo_owner; 1263 } 1264 1265 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 1266 enum nl80211_chan_width width, 1267 struct ieee80211_supported_band *sband, 1268 struct ieee80211_mgd_assoc_data *assoc_data) 1269 { 1270 u32 rates; 1271 1272 if (assoc_data->supp_rates_len) { 1273 /* 1274 * Get all rates supported by the device and the AP as 1275 * some APs don't like getting a superset of their rates 1276 * in the association request (e.g. D-Link DAP 1353 in 1277 * b-only mode)... 1278 */ 1279 ieee80211_parse_bitrates(width, sband, 1280 assoc_data->supp_rates, 1281 assoc_data->supp_rates_len, 1282 &rates); 1283 } else { 1284 /* 1285 * In case AP not provide any supported rates information 1286 * before association, we send information element(s) with 1287 * all rates that we support. 1288 */ 1289 rates = ~0; 1290 } 1291 1292 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1293 WLAN_EID_SUPP_RATES); 1294 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1295 WLAN_EID_EXT_SUPP_RATES); 1296 } 1297 1298 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1299 const u8 *elems, 1300 size_t elems_len, 1301 size_t offset) 1302 { 1303 size_t noffset; 1304 1305 static const u8 before_ht[] = { 1306 WLAN_EID_SSID, 1307 WLAN_EID_SUPP_RATES, 1308 WLAN_EID_EXT_SUPP_RATES, 1309 WLAN_EID_PWR_CAPABILITY, 1310 WLAN_EID_SUPPORTED_CHANNELS, 1311 WLAN_EID_RSN, 1312 WLAN_EID_QOS_CAPA, 1313 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1314 WLAN_EID_MOBILITY_DOMAIN, 1315 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1316 WLAN_EID_RIC_DATA, /* reassoc only */ 1317 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1318 }; 1319 static const u8 after_ric[] = { 1320 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1321 WLAN_EID_HT_CAPABILITY, 1322 WLAN_EID_BSS_COEX_2040, 1323 /* luckily this is almost always there */ 1324 WLAN_EID_EXT_CAPABILITY, 1325 WLAN_EID_QOS_TRAFFIC_CAPA, 1326 WLAN_EID_TIM_BCAST_REQ, 1327 WLAN_EID_INTERWORKING, 1328 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1329 WLAN_EID_VHT_CAPABILITY, 1330 WLAN_EID_OPMODE_NOTIF, 1331 }; 1332 1333 if (!elems_len) 1334 return offset; 1335 1336 noffset = ieee80211_ie_split_ric(elems, elems_len, 1337 before_ht, 1338 ARRAY_SIZE(before_ht), 1339 after_ric, 1340 ARRAY_SIZE(after_ric), 1341 offset); 1342 skb_put_data(skb, elems + offset, noffset - offset); 1343 1344 return noffset; 1345 } 1346 1347 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1348 const u8 *elems, 1349 size_t elems_len, 1350 size_t offset) 1351 { 1352 static const u8 before_vht[] = { 1353 /* 1354 * no need to list the ones split off before HT 1355 * or generated here 1356 */ 1357 WLAN_EID_BSS_COEX_2040, 1358 WLAN_EID_EXT_CAPABILITY, 1359 WLAN_EID_QOS_TRAFFIC_CAPA, 1360 WLAN_EID_TIM_BCAST_REQ, 1361 WLAN_EID_INTERWORKING, 1362 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1363 }; 1364 size_t noffset; 1365 1366 if (!elems_len) 1367 return offset; 1368 1369 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1370 noffset = ieee80211_ie_split(elems, elems_len, 1371 before_vht, ARRAY_SIZE(before_vht), 1372 offset); 1373 skb_put_data(skb, elems + offset, noffset - offset); 1374 1375 return noffset; 1376 } 1377 1378 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1379 const u8 *elems, 1380 size_t elems_len, 1381 size_t offset) 1382 { 1383 static const u8 before_he[] = { 1384 /* 1385 * no need to list the ones split off before VHT 1386 * or generated here 1387 */ 1388 WLAN_EID_OPMODE_NOTIF, 1389 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1390 /* 11ai elements */ 1391 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1392 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1393 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1394 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1395 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1396 /* TODO: add 11ah/11aj/11ak elements */ 1397 }; 1398 size_t noffset; 1399 1400 if (!elems_len) 1401 return offset; 1402 1403 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1404 noffset = ieee80211_ie_split(elems, elems_len, 1405 before_he, ARRAY_SIZE(before_he), 1406 offset); 1407 skb_put_data(skb, elems + offset, noffset - offset); 1408 1409 return noffset; 1410 } 1411 1412 #define PRESENT_ELEMS_MAX 8 1413 #define PRESENT_ELEM_EXT_OFFS 0x100 1414 1415 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1416 struct sk_buff *skb, u16 capab, 1417 const struct element *ext_capa, 1418 const u16 *present_elems); 1419 1420 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1421 struct sk_buff *skb, u16 *capab, 1422 const struct element *ext_capa, 1423 const u8 *extra_elems, 1424 size_t extra_elems_len, 1425 unsigned int link_id, 1426 struct ieee80211_link_data *link, 1427 u16 *present_elems) 1428 { 1429 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1430 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1431 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1432 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1433 struct ieee80211_channel *chan = cbss->channel; 1434 const struct ieee80211_sband_iftype_data *iftd; 1435 struct ieee80211_local *local = sdata->local; 1436 struct ieee80211_supported_band *sband; 1437 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1438 struct ieee80211_chanctx_conf *chanctx_conf; 1439 enum ieee80211_smps_mode smps_mode; 1440 u16 orig_capab = *capab; 1441 size_t offset = 0; 1442 int present_elems_len = 0; 1443 u8 *pos; 1444 int i; 1445 1446 #define ADD_PRESENT_ELEM(id) do { \ 1447 /* need a last for termination - we use 0 == SSID */ \ 1448 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1449 present_elems[present_elems_len++] = (id); \ 1450 } while (0) 1451 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1452 1453 if (link) 1454 smps_mode = link->smps_mode; 1455 else if (sdata->u.mgd.powersave) 1456 smps_mode = IEEE80211_SMPS_DYNAMIC; 1457 else 1458 smps_mode = IEEE80211_SMPS_OFF; 1459 1460 if (link) { 1461 /* 1462 * 5/10 MHz scenarios are only viable without MLO, in which 1463 * case this pointer should be used ... All of this is a bit 1464 * unclear though, not sure this even works at all. 1465 */ 1466 rcu_read_lock(); 1467 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1468 if (chanctx_conf) 1469 width = chanctx_conf->def.width; 1470 rcu_read_unlock(); 1471 } 1472 1473 sband = local->hw.wiphy->bands[chan->band]; 1474 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1475 1476 if (sband->band == NL80211_BAND_2GHZ) { 1477 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1478 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1479 } 1480 1481 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1482 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1483 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1484 1485 if (sband->band != NL80211_BAND_S1GHZ) 1486 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1487 1488 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1489 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1490 struct cfg80211_chan_def chandef = { 1491 .width = width, 1492 .chan = chan, 1493 }; 1494 1495 pos = skb_put(skb, 4); 1496 *pos++ = WLAN_EID_PWR_CAPABILITY; 1497 *pos++ = 2; 1498 *pos++ = 0; /* min tx power */ 1499 /* max tx power */ 1500 *pos++ = ieee80211_chandef_max_power(&chandef); 1501 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1502 } 1503 1504 /* 1505 * Per spec, we shouldn't include the list of channels if we advertise 1506 * support for extended channel switching, but we've always done that; 1507 * (for now?) apply this restriction only on the (new) 6 GHz band. 1508 */ 1509 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1510 (sband->band != NL80211_BAND_6GHZ || 1511 !ext_capa || ext_capa->datalen < 1 || 1512 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1513 /* TODO: get this in reg domain format */ 1514 pos = skb_put(skb, 2 * sband->n_channels + 2); 1515 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1516 *pos++ = 2 * sband->n_channels; 1517 for (i = 0; i < sband->n_channels; i++) { 1518 int cf = sband->channels[i].center_freq; 1519 1520 *pos++ = ieee80211_frequency_to_channel(cf); 1521 *pos++ = 1; /* one channel in the subband*/ 1522 } 1523 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1524 } 1525 1526 /* if present, add any custom IEs that go before HT */ 1527 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1528 extra_elems_len, 1529 offset); 1530 1531 if (sband->band != NL80211_BAND_6GHZ && 1532 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1533 ieee80211_add_ht_ie(sdata, skb, 1534 assoc_data->link[link_id].ap_ht_param, 1535 sband, chan, smps_mode, 1536 &assoc_data->link[link_id].conn); 1537 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1538 } 1539 1540 /* if present, add any custom IEs that go before VHT */ 1541 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1542 extra_elems_len, 1543 offset); 1544 1545 if (sband->band != NL80211_BAND_6GHZ && 1546 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1547 sband->vht_cap.vht_supported) { 1548 bool mu_mimo_owner = 1549 ieee80211_add_vht_ie(sdata, skb, sband, 1550 &assoc_data->link[link_id].ap_vht_cap, 1551 &assoc_data->link[link_id].conn); 1552 1553 if (link) 1554 link->conf->mu_mimo_owner = mu_mimo_owner; 1555 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1556 } 1557 1558 /* if present, add any custom IEs that go before HE */ 1559 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1560 extra_elems_len, 1561 offset); 1562 1563 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1564 ieee80211_put_he_cap(skb, sdata, sband, 1565 &assoc_data->link[link_id].conn); 1566 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1567 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1568 } 1569 1570 /* 1571 * careful - need to know about all the present elems before 1572 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1573 * we're going to put it after the ML element 1574 */ 1575 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1576 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1577 1578 if (link_id == assoc_data->assoc_link_id) 1579 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1580 present_elems); 1581 1582 /* crash if somebody gets it wrong */ 1583 present_elems = NULL; 1584 1585 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1586 ieee80211_put_eht_cap(skb, sdata, sband, 1587 &assoc_data->link[link_id].conn); 1588 1589 if (sband->band == NL80211_BAND_S1GHZ) { 1590 ieee80211_add_aid_request_ie(sdata, skb); 1591 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1592 } 1593 1594 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1595 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1596 1597 return offset; 1598 } 1599 1600 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1601 const u16 *outer, 1602 const u16 *inner) 1603 { 1604 unsigned int skb_len = skb->len; 1605 bool at_extension = false; 1606 bool added = false; 1607 int i, j; 1608 u8 *len, *list_len = NULL; 1609 1610 skb_put_u8(skb, WLAN_EID_EXTENSION); 1611 len = skb_put(skb, 1); 1612 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1613 1614 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1615 u16 elem = outer[i]; 1616 bool have_inner = false; 1617 1618 /* should at least be sorted in the sense of normal -> ext */ 1619 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1620 1621 /* switch to extension list */ 1622 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1623 at_extension = true; 1624 if (!list_len) 1625 skb_put_u8(skb, 0); 1626 list_len = NULL; 1627 } 1628 1629 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1630 if (elem == inner[j]) { 1631 have_inner = true; 1632 break; 1633 } 1634 } 1635 1636 if (have_inner) 1637 continue; 1638 1639 if (!list_len) { 1640 list_len = skb_put(skb, 1); 1641 *list_len = 0; 1642 } 1643 *list_len += 1; 1644 skb_put_u8(skb, (u8)elem); 1645 added = true; 1646 } 1647 1648 /* if we added a list but no extension list, make a zero-len one */ 1649 if (added && (!at_extension || !list_len)) 1650 skb_put_u8(skb, 0); 1651 1652 /* if nothing added remove extension element completely */ 1653 if (!added) 1654 skb_trim(skb, skb_len); 1655 else 1656 *len = skb->len - skb_len - 2; 1657 } 1658 1659 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1660 struct sk_buff *skb, u16 capab, 1661 const struct element *ext_capa, 1662 const u16 *outer_present_elems) 1663 { 1664 struct ieee80211_local *local = sdata->local; 1665 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1666 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1667 struct ieee80211_multi_link_elem *ml_elem; 1668 struct ieee80211_mle_basic_common_info *common; 1669 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1670 __le16 eml_capa = 0, mld_capa_ops = 0; 1671 unsigned int link_id; 1672 u8 *ml_elem_len; 1673 void *capab_pos; 1674 1675 if (!ieee80211_vif_is_mld(&sdata->vif)) 1676 return; 1677 1678 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1679 ieee80211_vif_type_p2p(&sdata->vif)); 1680 if (ift_ext_capa) { 1681 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1682 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1683 } 1684 1685 skb_put_u8(skb, WLAN_EID_EXTENSION); 1686 ml_elem_len = skb_put(skb, 1); 1687 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1688 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1689 ml_elem->control = 1690 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1691 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1692 common = skb_put(skb, sizeof(*common)); 1693 common->len = sizeof(*common) + 1694 2; /* MLD capa/ops */ 1695 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1696 1697 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1698 if (eml_capa & 1699 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1700 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1701 common->len += 2; /* EML capabilities */ 1702 ml_elem->control |= 1703 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1704 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1705 } 1706 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1707 1708 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1709 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1710 const u8 *extra_elems; 1711 size_t extra_elems_len; 1712 size_t extra_used; 1713 u8 *subelem_len = NULL; 1714 __le16 ctrl; 1715 1716 if (!assoc_data->link[link_id].bss || 1717 link_id == assoc_data->assoc_link_id) 1718 continue; 1719 1720 extra_elems = assoc_data->link[link_id].elems; 1721 extra_elems_len = assoc_data->link[link_id].elems_len; 1722 1723 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1724 subelem_len = skb_put(skb, 1); 1725 1726 ctrl = cpu_to_le16(link_id | 1727 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1728 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1729 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1730 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1731 skb_put_data(skb, assoc_data->link[link_id].addr, 1732 ETH_ALEN); 1733 /* 1734 * Now add the contents of the (re)association request, 1735 * but the "listen interval" and "current AP address" 1736 * (if applicable) are skipped. So we only have 1737 * the capability field (remember the position and fill 1738 * later), followed by the elements added below by 1739 * calling ieee80211_assoc_link_elems(). 1740 */ 1741 capab_pos = skb_put(skb, 2); 1742 1743 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1744 ext_capa, 1745 extra_elems, 1746 extra_elems_len, 1747 link_id, NULL, 1748 link_present_elems); 1749 if (extra_elems) 1750 skb_put_data(skb, extra_elems + extra_used, 1751 extra_elems_len - extra_used); 1752 1753 put_unaligned_le16(capab, capab_pos); 1754 1755 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1756 link_present_elems); 1757 1758 ieee80211_fragment_element(skb, subelem_len, 1759 IEEE80211_MLE_SUBELEM_FRAGMENT); 1760 } 1761 1762 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1763 } 1764 1765 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1766 { 1767 struct ieee80211_local *local = sdata->local; 1768 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1769 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1770 struct ieee80211_link_data *link; 1771 struct sk_buff *skb; 1772 struct ieee80211_mgmt *mgmt; 1773 u8 *pos, qos_info, *ie_start; 1774 size_t offset, noffset; 1775 u16 capab = 0, link_capab; 1776 __le16 listen_int; 1777 struct element *ext_capa = NULL; 1778 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1779 struct ieee80211_prep_tx_info info = {}; 1780 unsigned int link_id, n_links = 0; 1781 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1782 void *capab_pos; 1783 size_t size; 1784 int ret; 1785 1786 /* we know it's writable, cast away the const */ 1787 if (assoc_data->ie_len) 1788 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1789 assoc_data->ie, 1790 assoc_data->ie_len); 1791 1792 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1793 1794 size = local->hw.extra_tx_headroom + 1795 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1796 2 + assoc_data->ssid_len + /* SSID */ 1797 assoc_data->ie_len + /* extra IEs */ 1798 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1799 9; /* WMM */ 1800 1801 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1802 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1803 const struct ieee80211_sband_iftype_data *iftd; 1804 struct ieee80211_supported_band *sband; 1805 1806 if (!cbss) 1807 continue; 1808 1809 sband = local->hw.wiphy->bands[cbss->channel->band]; 1810 1811 n_links++; 1812 /* add STA profile elements length */ 1813 size += assoc_data->link[link_id].elems_len; 1814 /* and supported rates length */ 1815 size += 4 + sband->n_bitrates; 1816 /* supported channels */ 1817 size += 2 + 2 * sband->n_channels; 1818 1819 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1820 if (iftd) 1821 size += iftd->vendor_elems.len; 1822 1823 /* power capability */ 1824 size += 4; 1825 1826 /* HT, VHT, HE, EHT */ 1827 size += 2 + sizeof(struct ieee80211_ht_cap); 1828 size += 2 + sizeof(struct ieee80211_vht_cap); 1829 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1830 sizeof(struct ieee80211_he_mcs_nss_supp) + 1831 IEEE80211_HE_PPE_THRES_MAX_LEN; 1832 1833 if (sband->band == NL80211_BAND_6GHZ) 1834 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1835 1836 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1837 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1838 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1839 1840 /* non-inheritance element */ 1841 size += 2 + 2 + PRESENT_ELEMS_MAX; 1842 1843 /* should be the same across all BSSes */ 1844 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1845 capab |= WLAN_CAPABILITY_PRIVACY; 1846 } 1847 1848 if (ieee80211_vif_is_mld(&sdata->vif)) { 1849 /* consider the multi-link element with STA profile */ 1850 size += sizeof(struct ieee80211_multi_link_elem); 1851 /* max common info field in basic multi-link element */ 1852 size += sizeof(struct ieee80211_mle_basic_common_info) + 1853 2 + /* capa & op */ 1854 2; /* EML capa */ 1855 1856 /* 1857 * The capability elements were already considered above; 1858 * note this over-estimates a bit because there's no 1859 * STA profile for the assoc link. 1860 */ 1861 size += (n_links - 1) * 1862 (1 + 1 + /* subelement ID/length */ 1863 2 + /* STA control */ 1864 1 + ETH_ALEN + 2 /* STA Info field */); 1865 } 1866 1867 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1868 if (WARN_ON(!link)) 1869 return -EINVAL; 1870 1871 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1872 return -EINVAL; 1873 1874 skb = alloc_skb(size, GFP_KERNEL); 1875 if (!skb) 1876 return -ENOMEM; 1877 1878 skb_reserve(skb, local->hw.extra_tx_headroom); 1879 1880 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1881 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1882 1883 /* Set MBSSID support for HE AP if needed */ 1884 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1885 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 1886 ext_capa && ext_capa->datalen >= 3) 1887 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1888 1889 mgmt = skb_put_zero(skb, 24); 1890 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1891 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1892 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1893 1894 listen_int = cpu_to_le16(assoc_data->s1g ? 1895 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1896 local->hw.conf.listen_interval); 1897 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1898 skb_put(skb, 10); 1899 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1900 IEEE80211_STYPE_REASSOC_REQ); 1901 capab_pos = &mgmt->u.reassoc_req.capab_info; 1902 mgmt->u.reassoc_req.listen_interval = listen_int; 1903 memcpy(mgmt->u.reassoc_req.current_ap, 1904 assoc_data->prev_ap_addr, ETH_ALEN); 1905 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1906 } else { 1907 skb_put(skb, 4); 1908 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1909 IEEE80211_STYPE_ASSOC_REQ); 1910 capab_pos = &mgmt->u.assoc_req.capab_info; 1911 mgmt->u.assoc_req.listen_interval = listen_int; 1912 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1913 } 1914 1915 /* SSID */ 1916 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1917 ie_start = pos; 1918 *pos++ = WLAN_EID_SSID; 1919 *pos++ = assoc_data->ssid_len; 1920 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1921 1922 /* 1923 * This bit is technically reserved, so it shouldn't matter for either 1924 * the AP or us, but it also means we shouldn't set it. However, we've 1925 * always set it in the past, and apparently some EHT APs check that 1926 * we don't set it. To avoid interoperability issues with old APs that 1927 * for some reason check it and want it to be set, set the bit for all 1928 * pre-EHT connections as we used to do. 1929 */ 1930 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT) 1931 capab |= WLAN_CAPABILITY_ESS; 1932 1933 /* add the elements for the assoc (main) link */ 1934 link_capab = capab; 1935 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1936 ext_capa, 1937 assoc_data->ie, 1938 assoc_data->ie_len, 1939 assoc_data->assoc_link_id, link, 1940 present_elems); 1941 put_unaligned_le16(link_capab, capab_pos); 1942 1943 /* if present, add any custom non-vendor IEs */ 1944 if (assoc_data->ie_len) { 1945 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1946 assoc_data->ie_len, 1947 offset); 1948 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1949 offset = noffset; 1950 } 1951 1952 if (assoc_data->wmm) { 1953 if (assoc_data->uapsd) { 1954 qos_info = ifmgd->uapsd_queues; 1955 qos_info |= (ifmgd->uapsd_max_sp_len << 1956 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1957 } else { 1958 qos_info = 0; 1959 } 1960 1961 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1962 } 1963 1964 /* add any remaining custom (i.e. vendor specific here) IEs */ 1965 if (assoc_data->ie_len) { 1966 noffset = assoc_data->ie_len; 1967 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1968 } 1969 1970 if (assoc_data->fils_kek_len) { 1971 ret = fils_encrypt_assoc_req(skb, assoc_data); 1972 if (ret < 0) { 1973 dev_kfree_skb(skb); 1974 return ret; 1975 } 1976 } 1977 1978 pos = skb_tail_pointer(skb); 1979 kfree(ifmgd->assoc_req_ies); 1980 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1981 if (!ifmgd->assoc_req_ies) { 1982 dev_kfree_skb(skb); 1983 return -ENOMEM; 1984 } 1985 1986 ifmgd->assoc_req_ies_len = pos - ie_start; 1987 1988 info.link_id = assoc_data->assoc_link_id; 1989 drv_mgd_prepare_tx(local, sdata, &info); 1990 1991 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1992 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1993 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1994 IEEE80211_TX_INTFL_MLME_CONN_TX; 1995 ieee80211_tx_skb(sdata, skb); 1996 1997 return 0; 1998 } 1999 2000 void ieee80211_send_pspoll(struct ieee80211_local *local, 2001 struct ieee80211_sub_if_data *sdata) 2002 { 2003 struct ieee80211_pspoll *pspoll; 2004 struct sk_buff *skb; 2005 2006 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2007 if (!skb) 2008 return; 2009 2010 pspoll = (struct ieee80211_pspoll *) skb->data; 2011 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2012 2013 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2014 ieee80211_tx_skb(sdata, skb); 2015 } 2016 2017 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2018 struct ieee80211_sub_if_data *sdata, 2019 bool powersave) 2020 { 2021 struct sk_buff *skb; 2022 struct ieee80211_hdr_3addr *nullfunc; 2023 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2024 2025 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2026 !ieee80211_hw_check(&local->hw, 2027 DOESNT_SUPPORT_QOS_NDP)); 2028 if (!skb) 2029 return; 2030 2031 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2032 if (powersave) 2033 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2034 2035 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2036 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2037 2038 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2039 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2040 2041 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2042 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2043 2044 ieee80211_tx_skb(sdata, skb); 2045 } 2046 2047 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2048 struct ieee80211_sub_if_data *sdata) 2049 { 2050 struct sk_buff *skb; 2051 struct ieee80211_hdr *nullfunc; 2052 __le16 fc; 2053 2054 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2055 return; 2056 2057 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2058 if (!skb) 2059 return; 2060 2061 skb_reserve(skb, local->hw.extra_tx_headroom); 2062 2063 nullfunc = skb_put_zero(skb, 30); 2064 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2065 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2066 nullfunc->frame_control = fc; 2067 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2068 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2069 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2070 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2071 2072 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2073 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2074 ieee80211_tx_skb(sdata, skb); 2075 } 2076 2077 /* spectrum management related things */ 2078 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2079 struct wiphy_work *work) 2080 { 2081 struct ieee80211_link_data *link = 2082 container_of(work, struct ieee80211_link_data, 2083 u.mgd.csa.switch_work.work); 2084 struct ieee80211_sub_if_data *sdata = link->sdata; 2085 struct ieee80211_local *local = sdata->local; 2086 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2087 int ret; 2088 2089 if (!ieee80211_sdata_running(sdata)) 2090 return; 2091 2092 lockdep_assert_wiphy(local->hw.wiphy); 2093 2094 if (!ifmgd->associated) 2095 return; 2096 2097 if (!link->conf->csa_active) 2098 return; 2099 2100 /* 2101 * If the link isn't active (now), we cannot wait for beacons, won't 2102 * have a reserved chanctx, etc. Just switch over the chandef and 2103 * update cfg80211 directly. 2104 */ 2105 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2106 link->conf->chanreq = link->csa.chanreq; 2107 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2108 link->link_id); 2109 return; 2110 } 2111 2112 /* 2113 * using reservation isn't immediate as it may be deferred until later 2114 * with multi-vif. once reservation is complete it will re-schedule the 2115 * work with no reserved_chanctx so verify chandef to check if it 2116 * completed successfully 2117 */ 2118 2119 if (link->reserved_chanctx) { 2120 /* 2121 * with multi-vif csa driver may call ieee80211_csa_finish() 2122 * many times while waiting for other interfaces to use their 2123 * reservations 2124 */ 2125 if (link->reserved_ready) 2126 return; 2127 2128 ret = ieee80211_link_use_reserved_context(link); 2129 if (ret) { 2130 link_info(link, 2131 "failed to use reserved channel context, disconnecting (err=%d)\n", 2132 ret); 2133 wiphy_work_queue(sdata->local->hw.wiphy, 2134 &ifmgd->csa_connection_drop_work); 2135 } 2136 return; 2137 } 2138 2139 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2140 &link->csa.chanreq)) { 2141 link_info(link, 2142 "failed to finalize channel switch, disconnecting\n"); 2143 wiphy_work_queue(sdata->local->hw.wiphy, 2144 &ifmgd->csa_connection_drop_work); 2145 return; 2146 } 2147 2148 link->u.mgd.csa.waiting_bcn = true; 2149 2150 /* apply new TPE restrictions immediately on the new channel */ 2151 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2152 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2153 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2154 &link->u.mgd.csa.ap_chandef, 2155 &link->conf->chanreq.oper); 2156 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2157 sizeof(link->u.mgd.csa.tpe))) { 2158 link->conf->tpe = link->u.mgd.csa.tpe; 2159 ieee80211_link_info_change_notify(sdata, link, 2160 BSS_CHANGED_TPE); 2161 } 2162 } 2163 2164 ieee80211_sta_reset_beacon_monitor(sdata); 2165 ieee80211_sta_reset_conn_monitor(sdata); 2166 } 2167 2168 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2169 { 2170 struct ieee80211_sub_if_data *sdata = link->sdata; 2171 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2172 int ret; 2173 2174 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2175 2176 WARN_ON(!link->conf->csa_active); 2177 2178 ieee80211_vif_unblock_queues_csa(sdata); 2179 2180 link->conf->csa_active = false; 2181 link->u.mgd.csa.blocked_tx = false; 2182 link->u.mgd.csa.waiting_bcn = false; 2183 2184 ret = drv_post_channel_switch(link); 2185 if (ret) { 2186 link_info(link, 2187 "driver post channel switch failed, disconnecting\n"); 2188 wiphy_work_queue(sdata->local->hw.wiphy, 2189 &ifmgd->csa_connection_drop_work); 2190 return; 2191 } 2192 2193 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2194 link->link_id); 2195 } 2196 2197 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2198 unsigned int link_id) 2199 { 2200 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2201 2202 trace_api_chswitch_done(sdata, success, link_id); 2203 2204 rcu_read_lock(); 2205 2206 if (!success) { 2207 sdata_info(sdata, 2208 "driver channel switch failed (link %d), disconnecting\n", 2209 link_id); 2210 wiphy_work_queue(sdata->local->hw.wiphy, 2211 &sdata->u.mgd.csa_connection_drop_work); 2212 } else { 2213 struct ieee80211_link_data *link = 2214 rcu_dereference(sdata->link[link_id]); 2215 2216 if (WARN_ON(!link)) { 2217 rcu_read_unlock(); 2218 return; 2219 } 2220 2221 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2222 &link->u.mgd.csa.switch_work, 0); 2223 } 2224 2225 rcu_read_unlock(); 2226 } 2227 EXPORT_SYMBOL(ieee80211_chswitch_done); 2228 2229 static void 2230 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2231 { 2232 struct ieee80211_sub_if_data *sdata = link->sdata; 2233 struct ieee80211_local *local = sdata->local; 2234 2235 lockdep_assert_wiphy(local->hw.wiphy); 2236 2237 if (!local->ops->abort_channel_switch) 2238 return; 2239 2240 ieee80211_link_unreserve_chanctx(link); 2241 2242 ieee80211_vif_unblock_queues_csa(sdata); 2243 2244 link->conf->csa_active = false; 2245 link->u.mgd.csa.blocked_tx = false; 2246 2247 drv_abort_channel_switch(link); 2248 } 2249 2250 struct sta_csa_rnr_iter_data { 2251 struct ieee80211_link_data *link; 2252 struct ieee80211_channel *chan; 2253 u8 mld_id; 2254 }; 2255 2256 static enum cfg80211_rnr_iter_ret 2257 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2258 const struct ieee80211_neighbor_ap_info *info, 2259 const u8 *tbtt_info, u8 tbtt_info_len) 2260 { 2261 struct sta_csa_rnr_iter_data *data = _data; 2262 struct ieee80211_link_data *link = data->link; 2263 struct ieee80211_sub_if_data *sdata = link->sdata; 2264 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2265 const struct ieee80211_tbtt_info_ge_11 *ti; 2266 enum nl80211_band band; 2267 unsigned int center_freq; 2268 int link_id; 2269 2270 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2271 return RNR_ITER_CONTINUE; 2272 2273 if (tbtt_info_len < sizeof(*ti)) 2274 return RNR_ITER_CONTINUE; 2275 2276 ti = (const void *)tbtt_info; 2277 2278 if (ti->mld_params.mld_id != data->mld_id) 2279 return RNR_ITER_CONTINUE; 2280 2281 link_id = le16_get_bits(ti->mld_params.params, 2282 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2283 if (link_id != data->link->link_id) 2284 return RNR_ITER_CONTINUE; 2285 2286 /* we found the entry for our link! */ 2287 2288 /* this AP is confused, it had this right before ... just disconnect */ 2289 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2290 link_info(link, 2291 "AP now has invalid operating class in RNR, disconnect\n"); 2292 wiphy_work_queue(sdata->local->hw.wiphy, 2293 &ifmgd->csa_connection_drop_work); 2294 return RNR_ITER_BREAK; 2295 } 2296 2297 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2298 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2299 2300 return RNR_ITER_BREAK; 2301 } 2302 2303 static void 2304 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2305 struct ieee802_11_elems *elems) 2306 { 2307 struct ieee80211_sub_if_data *sdata = link->sdata; 2308 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2309 struct sta_csa_rnr_iter_data data = { 2310 .link = link, 2311 }; 2312 2313 /* 2314 * If we get here, we see a beacon from another link without 2315 * CSA still being reported for it, so now we have to check 2316 * if the CSA was aborted or completed. This may not even be 2317 * perfectly possible if the CSA was only done for changing 2318 * the puncturing, but in that case if the link in inactive 2319 * we don't really care, and if it's an active link (or when 2320 * it's activated later) we'll get a beacon and adjust. 2321 */ 2322 2323 if (WARN_ON(!elems->ml_basic)) 2324 return; 2325 2326 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2327 2328 /* 2329 * So in order to do this, iterate the RNR element(s) and see 2330 * what channel is reported now. 2331 */ 2332 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2333 ieee80211_sta_csa_rnr_iter, &data); 2334 2335 if (!data.chan) { 2336 link_info(link, 2337 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2338 wiphy_work_queue(sdata->local->hw.wiphy, 2339 &ifmgd->csa_connection_drop_work); 2340 return; 2341 } 2342 2343 /* 2344 * If it doesn't match the CSA, then assume it aborted. This 2345 * may erroneously detect that it was _not_ aborted when it 2346 * was in fact aborted, but only changed the bandwidth or the 2347 * puncturing configuration, but we don't have enough data to 2348 * detect that. 2349 */ 2350 if (data.chan != link->csa.chanreq.oper.chan) 2351 ieee80211_sta_abort_chanswitch(link); 2352 } 2353 2354 enum ieee80211_csa_source { 2355 IEEE80211_CSA_SOURCE_BEACON, 2356 IEEE80211_CSA_SOURCE_OTHER_LINK, 2357 IEEE80211_CSA_SOURCE_PROT_ACTION, 2358 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2359 }; 2360 2361 static void 2362 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2363 u64 timestamp, u32 device_timestamp, 2364 struct ieee802_11_elems *full_elems, 2365 struct ieee802_11_elems *csa_elems, 2366 enum ieee80211_csa_source source) 2367 { 2368 struct ieee80211_sub_if_data *sdata = link->sdata; 2369 struct ieee80211_local *local = sdata->local; 2370 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2371 struct ieee80211_chanctx *chanctx = NULL; 2372 struct ieee80211_chanctx_conf *conf; 2373 struct ieee80211_csa_ie csa_ie = {}; 2374 struct ieee80211_channel_switch ch_switch = { 2375 .link_id = link->link_id, 2376 .timestamp = timestamp, 2377 .device_timestamp = device_timestamp, 2378 }; 2379 unsigned long now; 2380 int res; 2381 2382 lockdep_assert_wiphy(local->hw.wiphy); 2383 2384 if (csa_elems) { 2385 struct cfg80211_bss *cbss = link->conf->bss; 2386 enum nl80211_band current_band; 2387 struct ieee80211_bss *bss; 2388 2389 if (WARN_ON(!cbss)) 2390 return; 2391 2392 current_band = cbss->channel->band; 2393 bss = (void *)cbss->priv; 2394 2395 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2396 current_band, 2397 bss->vht_cap_info, 2398 &link->u.mgd.conn, 2399 link->u.mgd.bssid, 2400 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2401 &csa_ie); 2402 if (res == 0) { 2403 ch_switch.block_tx = csa_ie.mode; 2404 ch_switch.chandef = csa_ie.chanreq.oper; 2405 ch_switch.count = csa_ie.count; 2406 ch_switch.delay = csa_ie.max_switch_time; 2407 } 2408 2409 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2410 } else { 2411 /* 2412 * If there was no per-STA profile for this link, we 2413 * get called with csa_elems == NULL. This of course means 2414 * there are no CSA elements, so set res=1 indicating 2415 * no more CSA. 2416 */ 2417 res = 1; 2418 } 2419 2420 if (res < 0) { 2421 /* ignore this case, not a protected frame */ 2422 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2423 return; 2424 goto drop_connection; 2425 } 2426 2427 if (link->conf->csa_active) { 2428 switch (source) { 2429 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2430 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2431 /* already processing - disregard action frames */ 2432 return; 2433 case IEEE80211_CSA_SOURCE_BEACON: 2434 if (link->u.mgd.csa.waiting_bcn) { 2435 ieee80211_chswitch_post_beacon(link); 2436 /* 2437 * If the CSA is still present after the switch 2438 * we need to consider it as a new CSA (possibly 2439 * to self). This happens by not returning here 2440 * so we'll get to the check below. 2441 */ 2442 } else if (res) { 2443 ieee80211_sta_abort_chanswitch(link); 2444 return; 2445 } else { 2446 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2447 return; 2448 } 2449 break; 2450 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2451 /* active link: we want to see the beacon to continue */ 2452 if (ieee80211_vif_link_active(&sdata->vif, 2453 link->link_id)) 2454 return; 2455 2456 /* switch work ran, so just complete the process */ 2457 if (link->u.mgd.csa.waiting_bcn) { 2458 ieee80211_chswitch_post_beacon(link); 2459 /* 2460 * If the CSA is still present after the switch 2461 * we need to consider it as a new CSA (possibly 2462 * to self). This happens by not returning here 2463 * so we'll get to the check below. 2464 */ 2465 break; 2466 } 2467 2468 /* link still has CSA but we already know, do nothing */ 2469 if (!res) 2470 return; 2471 2472 /* check in the RNR if the CSA aborted */ 2473 ieee80211_sta_other_link_csa_disappeared(link, 2474 full_elems); 2475 return; 2476 } 2477 } 2478 2479 /* no active CSA nor a new one */ 2480 if (res) { 2481 /* 2482 * However, we may have stopped queues when receiving a public 2483 * action frame that couldn't be protected, if it had the quiet 2484 * bit set. This is a trade-off, we want to be quiet as soon as 2485 * possible, but also don't trust the public action frame much, 2486 * as it can't be protected. 2487 */ 2488 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2489 link->u.mgd.csa.blocked_tx = false; 2490 ieee80211_vif_unblock_queues_csa(sdata); 2491 } 2492 return; 2493 } 2494 2495 /* 2496 * We don't really trust public action frames, but block queues (go to 2497 * quiet mode) for them anyway, we should get a beacon soon to either 2498 * know what the CSA really is, or figure out the public action frame 2499 * was actually an attack. 2500 */ 2501 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2502 if (csa_ie.mode) { 2503 link->u.mgd.csa.blocked_tx = true; 2504 ieee80211_vif_block_queues_csa(sdata); 2505 } 2506 return; 2507 } 2508 2509 if (link->conf->chanreq.oper.chan->band != 2510 csa_ie.chanreq.oper.chan->band) { 2511 link_info(link, 2512 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2513 link->u.mgd.bssid, 2514 csa_ie.chanreq.oper.chan->center_freq, 2515 csa_ie.chanreq.oper.width, 2516 csa_ie.chanreq.oper.center_freq1, 2517 csa_ie.chanreq.oper.center_freq2); 2518 goto drop_connection; 2519 } 2520 2521 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2522 IEEE80211_CHAN_DISABLED)) { 2523 link_info(link, 2524 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2525 link->u.mgd.bssid, 2526 csa_ie.chanreq.oper.chan->center_freq, 2527 csa_ie.chanreq.oper.chan->freq_offset, 2528 csa_ie.chanreq.oper.width, 2529 csa_ie.chanreq.oper.center_freq1, 2530 csa_ie.chanreq.oper.freq1_offset, 2531 csa_ie.chanreq.oper.center_freq2); 2532 goto drop_connection; 2533 } 2534 2535 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2536 &link->conf->chanreq.oper) && 2537 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2538 if (link->u.mgd.csa.ignored_same_chan) 2539 return; 2540 link_info(link, 2541 "AP %pM tries to chanswitch to same channel, ignore\n", 2542 link->u.mgd.bssid); 2543 link->u.mgd.csa.ignored_same_chan = true; 2544 return; 2545 } 2546 2547 /* 2548 * Drop all TDLS peers on the affected link - either we disconnect or 2549 * move to a different channel from this point on. There's no telling 2550 * what our peer will do. 2551 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2552 * have an incompatible wider chandef. 2553 */ 2554 ieee80211_teardown_tdls_peers(link); 2555 2556 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2557 lockdep_is_held(&local->hw.wiphy->mtx)); 2558 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2559 link_info(link, 2560 "no channel context assigned to vif?, disconnecting\n"); 2561 goto drop_connection; 2562 } 2563 2564 if (conf) 2565 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2566 2567 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2568 link_info(link, 2569 "driver doesn't support chan-switch with channel contexts\n"); 2570 goto drop_connection; 2571 } 2572 2573 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2574 link_info(link, 2575 "preparing for channel switch failed, disconnecting\n"); 2576 goto drop_connection; 2577 } 2578 2579 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2580 2581 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2582 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2583 &csa_ie.chanreq.ap); 2584 2585 if (chanctx) { 2586 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2587 chanctx->mode, false); 2588 if (res) { 2589 link_info(link, 2590 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2591 res); 2592 goto drop_connection; 2593 } 2594 } 2595 2596 link->conf->csa_active = true; 2597 link->u.mgd.csa.ignored_same_chan = false; 2598 link->u.mgd.beacon_crc_valid = false; 2599 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2600 2601 if (csa_ie.mode) 2602 ieee80211_vif_block_queues_csa(sdata); 2603 2604 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2605 link->link_id, csa_ie.count, 2606 csa_ie.mode); 2607 2608 /* we may have to handle timeout for deactivated link in software */ 2609 now = jiffies; 2610 link->u.mgd.csa.time = now + 2611 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2612 link->conf->beacon_int); 2613 2614 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 2615 local->ops->channel_switch) { 2616 /* 2617 * Use driver's channel switch callback, the driver will 2618 * later call ieee80211_chswitch_done(). It may deactivate 2619 * the link as well, we handle that elsewhere and queue 2620 * the csa.switch_work for the calculated time then. 2621 */ 2622 drv_channel_switch(local, sdata, &ch_switch); 2623 return; 2624 } 2625 2626 /* channel switch handled in software */ 2627 wiphy_delayed_work_queue(local->hw.wiphy, 2628 &link->u.mgd.csa.switch_work, 2629 link->u.mgd.csa.time - now); 2630 return; 2631 drop_connection: 2632 /* 2633 * This is just so that the disconnect flow will know that 2634 * we were trying to switch channel and failed. In case the 2635 * mode is 1 (we are not allowed to Tx), we will know not to 2636 * send a deauthentication frame. Those two fields will be 2637 * reset when the disconnection worker runs. 2638 */ 2639 link->conf->csa_active = true; 2640 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2641 2642 wiphy_work_queue(sdata->local->hw.wiphy, 2643 &ifmgd->csa_connection_drop_work); 2644 } 2645 2646 struct sta_bss_param_ch_cnt_data { 2647 struct ieee80211_sub_if_data *sdata; 2648 u8 reporting_link_id; 2649 u8 mld_id; 2650 }; 2651 2652 static enum cfg80211_rnr_iter_ret 2653 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 2654 const struct ieee80211_neighbor_ap_info *info, 2655 const u8 *tbtt_info, u8 tbtt_info_len) 2656 { 2657 struct sta_bss_param_ch_cnt_data *data = _data; 2658 struct ieee80211_sub_if_data *sdata = data->sdata; 2659 const struct ieee80211_tbtt_info_ge_11 *ti; 2660 u8 bss_param_ch_cnt; 2661 int link_id; 2662 2663 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2664 return RNR_ITER_CONTINUE; 2665 2666 if (tbtt_info_len < sizeof(*ti)) 2667 return RNR_ITER_CONTINUE; 2668 2669 ti = (const void *)tbtt_info; 2670 2671 if (ti->mld_params.mld_id != data->mld_id) 2672 return RNR_ITER_CONTINUE; 2673 2674 link_id = le16_get_bits(ti->mld_params.params, 2675 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2676 bss_param_ch_cnt = 2677 le16_get_bits(ti->mld_params.params, 2678 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 2679 2680 if (bss_param_ch_cnt != 255 && 2681 link_id < ARRAY_SIZE(sdata->link)) { 2682 struct ieee80211_link_data *link = 2683 sdata_dereference(sdata->link[link_id], sdata); 2684 2685 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 2686 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 2687 link->conf->bss_param_ch_cnt_link_id = 2688 data->reporting_link_id; 2689 } 2690 } 2691 2692 return RNR_ITER_CONTINUE; 2693 } 2694 2695 static void 2696 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 2697 struct ieee80211_bss_conf *bss_conf, 2698 struct ieee802_11_elems *elems) 2699 { 2700 struct sta_bss_param_ch_cnt_data data = { 2701 .reporting_link_id = bss_conf->link_id, 2702 .sdata = sdata, 2703 }; 2704 int bss_param_ch_cnt; 2705 2706 if (!elems->ml_basic) 2707 return; 2708 2709 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2710 2711 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2712 ieee80211_sta_bss_param_ch_cnt_iter, &data); 2713 2714 bss_param_ch_cnt = 2715 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 2716 2717 /* 2718 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 2719 * didn't change to indicate that we got a beacon on our own 2720 * link. 2721 */ 2722 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 2723 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 2724 bss_conf->bss_param_ch_cnt_link_id = 2725 bss_conf->link_id; 2726 } 2727 } 2728 2729 static bool 2730 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 2731 const u8 *country_ie, u8 country_ie_len, 2732 const u8 *pwr_constr_elem, 2733 int *chan_pwr, int *pwr_reduction) 2734 { 2735 struct ieee80211_country_ie_triplet *triplet; 2736 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2737 int i, chan_increment; 2738 bool have_chan_pwr = false; 2739 2740 /* Invalid IE */ 2741 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2742 return false; 2743 2744 triplet = (void *)(country_ie + 3); 2745 country_ie_len -= 3; 2746 2747 switch (channel->band) { 2748 default: 2749 WARN_ON_ONCE(1); 2750 fallthrough; 2751 case NL80211_BAND_2GHZ: 2752 case NL80211_BAND_60GHZ: 2753 case NL80211_BAND_LC: 2754 chan_increment = 1; 2755 break; 2756 case NL80211_BAND_5GHZ: 2757 chan_increment = 4; 2758 break; 2759 case NL80211_BAND_6GHZ: 2760 /* 2761 * In the 6 GHz band, the "maximum transmit power level" 2762 * field in the triplets is reserved, and thus will be 2763 * zero and we shouldn't use it to control TX power. 2764 * The actual TX power will be given in the transmit 2765 * power envelope element instead. 2766 */ 2767 return false; 2768 } 2769 2770 /* find channel */ 2771 while (country_ie_len >= 3) { 2772 u8 first_channel = triplet->chans.first_channel; 2773 2774 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2775 goto next; 2776 2777 for (i = 0; i < triplet->chans.num_channels; i++) { 2778 if (first_channel + i * chan_increment == chan) { 2779 have_chan_pwr = true; 2780 *chan_pwr = triplet->chans.max_power; 2781 break; 2782 } 2783 } 2784 if (have_chan_pwr) 2785 break; 2786 2787 next: 2788 triplet++; 2789 country_ie_len -= 3; 2790 } 2791 2792 if (have_chan_pwr && pwr_constr_elem) 2793 *pwr_reduction = *pwr_constr_elem; 2794 else 2795 *pwr_reduction = 0; 2796 2797 return have_chan_pwr; 2798 } 2799 2800 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 2801 const u8 *cisco_dtpc_ie, 2802 int *pwr_level) 2803 { 2804 /* From practical testing, the first data byte of the DTPC element 2805 * seems to contain the requested dBm level, and the CLI on Cisco 2806 * APs clearly state the range is -127 to 127 dBm, which indicates 2807 * a signed byte, although it seemingly never actually goes negative. 2808 * The other byte seems to always be zero. 2809 */ 2810 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2811 } 2812 2813 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2814 struct ieee80211_channel *channel, 2815 struct ieee80211_mgmt *mgmt, 2816 const u8 *country_ie, u8 country_ie_len, 2817 const u8 *pwr_constr_ie, 2818 const u8 *cisco_dtpc_ie) 2819 { 2820 struct ieee80211_sub_if_data *sdata = link->sdata; 2821 bool has_80211h_pwr = false, has_cisco_pwr = false; 2822 int chan_pwr = 0, pwr_reduction_80211h = 0; 2823 int pwr_level_cisco, pwr_level_80211h; 2824 int new_ap_level; 2825 __le16 capab = mgmt->u.probe_resp.capab_info; 2826 2827 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2828 return 0; /* TODO */ 2829 2830 if (country_ie && 2831 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2832 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2833 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2834 channel, country_ie, country_ie_len, 2835 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2836 pwr_level_80211h = 2837 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2838 } 2839 2840 if (cisco_dtpc_ie) { 2841 ieee80211_find_cisco_dtpc( 2842 channel, cisco_dtpc_ie, &pwr_level_cisco); 2843 has_cisco_pwr = true; 2844 } 2845 2846 if (!has_80211h_pwr && !has_cisco_pwr) 2847 return 0; 2848 2849 /* If we have both 802.11h and Cisco DTPC, apply both limits 2850 * by picking the smallest of the two power levels advertised. 2851 */ 2852 if (has_80211h_pwr && 2853 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2854 new_ap_level = pwr_level_80211h; 2855 2856 if (link->ap_power_level == new_ap_level) 2857 return 0; 2858 2859 sdata_dbg(sdata, 2860 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2861 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2862 link->u.mgd.bssid); 2863 } else { /* has_cisco_pwr is always true here. */ 2864 new_ap_level = pwr_level_cisco; 2865 2866 if (link->ap_power_level == new_ap_level) 2867 return 0; 2868 2869 sdata_dbg(sdata, 2870 "Limiting TX power to %d dBm as advertised by %pM\n", 2871 pwr_level_cisco, link->u.mgd.bssid); 2872 } 2873 2874 link->ap_power_level = new_ap_level; 2875 if (__ieee80211_recalc_txpower(link)) 2876 return BSS_CHANGED_TXPOWER; 2877 return 0; 2878 } 2879 2880 /* powersave */ 2881 static void ieee80211_enable_ps(struct ieee80211_local *local, 2882 struct ieee80211_sub_if_data *sdata) 2883 { 2884 struct ieee80211_conf *conf = &local->hw.conf; 2885 2886 /* 2887 * If we are scanning right now then the parameters will 2888 * take effect when scan finishes. 2889 */ 2890 if (local->scanning) 2891 return; 2892 2893 if (conf->dynamic_ps_timeout > 0 && 2894 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2895 mod_timer(&local->dynamic_ps_timer, jiffies + 2896 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2897 } else { 2898 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2899 ieee80211_send_nullfunc(local, sdata, true); 2900 2901 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2902 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2903 return; 2904 2905 conf->flags |= IEEE80211_CONF_PS; 2906 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2907 } 2908 } 2909 2910 static void ieee80211_change_ps(struct ieee80211_local *local) 2911 { 2912 struct ieee80211_conf *conf = &local->hw.conf; 2913 2914 if (local->ps_sdata) { 2915 ieee80211_enable_ps(local, local->ps_sdata); 2916 } else if (conf->flags & IEEE80211_CONF_PS) { 2917 conf->flags &= ~IEEE80211_CONF_PS; 2918 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2919 del_timer_sync(&local->dynamic_ps_timer); 2920 wiphy_work_cancel(local->hw.wiphy, 2921 &local->dynamic_ps_enable_work); 2922 } 2923 } 2924 2925 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2926 { 2927 struct ieee80211_local *local = sdata->local; 2928 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2929 struct sta_info *sta = NULL; 2930 bool authorized = false; 2931 2932 if (!mgd->powersave) 2933 return false; 2934 2935 if (mgd->broken_ap) 2936 return false; 2937 2938 if (!mgd->associated) 2939 return false; 2940 2941 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2942 return false; 2943 2944 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2945 !sdata->deflink.u.mgd.have_beacon) 2946 return false; 2947 2948 rcu_read_lock(); 2949 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2950 if (sta) 2951 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2952 rcu_read_unlock(); 2953 2954 return authorized; 2955 } 2956 2957 /* need to hold RTNL or interface lock */ 2958 void ieee80211_recalc_ps(struct ieee80211_local *local) 2959 { 2960 struct ieee80211_sub_if_data *sdata, *found = NULL; 2961 int count = 0; 2962 int timeout; 2963 2964 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2965 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2966 local->ps_sdata = NULL; 2967 return; 2968 } 2969 2970 list_for_each_entry(sdata, &local->interfaces, list) { 2971 if (!ieee80211_sdata_running(sdata)) 2972 continue; 2973 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2974 /* If an AP vif is found, then disable PS 2975 * by setting the count to zero thereby setting 2976 * ps_sdata to NULL. 2977 */ 2978 count = 0; 2979 break; 2980 } 2981 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2982 continue; 2983 found = sdata; 2984 count++; 2985 } 2986 2987 if (count == 1 && ieee80211_powersave_allowed(found)) { 2988 u8 dtimper = found->deflink.u.mgd.dtim_period; 2989 2990 timeout = local->dynamic_ps_forced_timeout; 2991 if (timeout < 0) 2992 timeout = 100; 2993 local->hw.conf.dynamic_ps_timeout = timeout; 2994 2995 /* If the TIM IE is invalid, pretend the value is 1 */ 2996 if (!dtimper) 2997 dtimper = 1; 2998 2999 local->hw.conf.ps_dtim_period = dtimper; 3000 local->ps_sdata = found; 3001 } else { 3002 local->ps_sdata = NULL; 3003 } 3004 3005 ieee80211_change_ps(local); 3006 } 3007 3008 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3009 { 3010 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3011 3012 if (sdata->vif.cfg.ps != ps_allowed) { 3013 sdata->vif.cfg.ps = ps_allowed; 3014 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3015 } 3016 } 3017 3018 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3019 struct wiphy_work *work) 3020 { 3021 struct ieee80211_local *local = 3022 container_of(work, struct ieee80211_local, 3023 dynamic_ps_disable_work); 3024 3025 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3026 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3027 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3028 } 3029 3030 ieee80211_wake_queues_by_reason(&local->hw, 3031 IEEE80211_MAX_QUEUE_MAP, 3032 IEEE80211_QUEUE_STOP_REASON_PS, 3033 false); 3034 } 3035 3036 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3037 struct wiphy_work *work) 3038 { 3039 struct ieee80211_local *local = 3040 container_of(work, struct ieee80211_local, 3041 dynamic_ps_enable_work); 3042 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3043 struct ieee80211_if_managed *ifmgd; 3044 unsigned long flags; 3045 int q; 3046 3047 /* can only happen when PS was just disabled anyway */ 3048 if (!sdata) 3049 return; 3050 3051 ifmgd = &sdata->u.mgd; 3052 3053 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3054 return; 3055 3056 if (local->hw.conf.dynamic_ps_timeout > 0) { 3057 /* don't enter PS if TX frames are pending */ 3058 if (drv_tx_frames_pending(local)) { 3059 mod_timer(&local->dynamic_ps_timer, jiffies + 3060 msecs_to_jiffies( 3061 local->hw.conf.dynamic_ps_timeout)); 3062 return; 3063 } 3064 3065 /* 3066 * transmission can be stopped by others which leads to 3067 * dynamic_ps_timer expiry. Postpone the ps timer if it 3068 * is not the actual idle state. 3069 */ 3070 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3071 for (q = 0; q < local->hw.queues; q++) { 3072 if (local->queue_stop_reasons[q]) { 3073 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3074 flags); 3075 mod_timer(&local->dynamic_ps_timer, jiffies + 3076 msecs_to_jiffies( 3077 local->hw.conf.dynamic_ps_timeout)); 3078 return; 3079 } 3080 } 3081 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3082 } 3083 3084 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3085 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3086 if (drv_tx_frames_pending(local)) { 3087 mod_timer(&local->dynamic_ps_timer, jiffies + 3088 msecs_to_jiffies( 3089 local->hw.conf.dynamic_ps_timeout)); 3090 } else { 3091 ieee80211_send_nullfunc(local, sdata, true); 3092 /* Flush to get the tx status of nullfunc frame */ 3093 ieee80211_flush_queues(local, sdata, false); 3094 } 3095 } 3096 3097 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3098 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3099 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3100 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3101 local->hw.conf.flags |= IEEE80211_CONF_PS; 3102 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3103 } 3104 } 3105 3106 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3107 { 3108 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 3109 3110 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3111 } 3112 3113 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3114 { 3115 struct ieee80211_link_data *link = 3116 container_of(work, struct ieee80211_link_data, 3117 dfs_cac_timer_work.work); 3118 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3119 struct ieee80211_sub_if_data *sdata = link->sdata; 3120 3121 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3122 3123 if (sdata->wdev.links[link->link_id].cac_started) { 3124 ieee80211_link_release_channel(link); 3125 cfg80211_cac_event(sdata->dev, &chandef, 3126 NL80211_RADAR_CAC_FINISHED, 3127 GFP_KERNEL, link->link_id); 3128 } 3129 } 3130 3131 static bool 3132 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3133 { 3134 struct ieee80211_local *local = sdata->local; 3135 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3136 bool ret = false; 3137 int ac; 3138 3139 if (local->hw.queues < IEEE80211_NUM_ACS) 3140 return false; 3141 3142 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3143 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3144 int non_acm_ac; 3145 unsigned long now = jiffies; 3146 3147 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3148 tx_tspec->admitted_time && 3149 time_after(now, tx_tspec->time_slice_start + HZ)) { 3150 tx_tspec->consumed_tx_time = 0; 3151 tx_tspec->time_slice_start = now; 3152 3153 if (tx_tspec->downgraded) 3154 tx_tspec->action = 3155 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3156 } 3157 3158 switch (tx_tspec->action) { 3159 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3160 /* take the original parameters */ 3161 if (drv_conf_tx(local, &sdata->deflink, ac, 3162 &sdata->deflink.tx_conf[ac])) 3163 link_err(&sdata->deflink, 3164 "failed to set TX queue parameters for queue %d\n", 3165 ac); 3166 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3167 tx_tspec->downgraded = false; 3168 ret = true; 3169 break; 3170 case TX_TSPEC_ACTION_DOWNGRADE: 3171 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3172 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3173 ret = true; 3174 break; 3175 } 3176 /* downgrade next lower non-ACM AC */ 3177 for (non_acm_ac = ac + 1; 3178 non_acm_ac < IEEE80211_NUM_ACS; 3179 non_acm_ac++) 3180 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3181 break; 3182 /* Usually the loop will result in using BK even if it 3183 * requires admission control, but such a configuration 3184 * makes no sense and we have to transmit somehow - the 3185 * AC selection does the same thing. 3186 * If we started out trying to downgrade from BK, then 3187 * the extra condition here might be needed. 3188 */ 3189 if (non_acm_ac >= IEEE80211_NUM_ACS) 3190 non_acm_ac = IEEE80211_AC_BK; 3191 if (drv_conf_tx(local, &sdata->deflink, ac, 3192 &sdata->deflink.tx_conf[non_acm_ac])) 3193 link_err(&sdata->deflink, 3194 "failed to set TX queue parameters for queue %d\n", 3195 ac); 3196 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3197 ret = true; 3198 wiphy_delayed_work_queue(local->hw.wiphy, 3199 &ifmgd->tx_tspec_wk, 3200 tx_tspec->time_slice_start + 3201 HZ - now + 1); 3202 break; 3203 case TX_TSPEC_ACTION_NONE: 3204 /* nothing now */ 3205 break; 3206 } 3207 } 3208 3209 return ret; 3210 } 3211 3212 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3213 { 3214 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3215 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3216 BSS_CHANGED_QOS); 3217 } 3218 3219 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3220 struct wiphy_work *work) 3221 { 3222 struct ieee80211_sub_if_data *sdata; 3223 3224 sdata = container_of(work, struct ieee80211_sub_if_data, 3225 u.mgd.tx_tspec_wk.work); 3226 ieee80211_sta_handle_tspec_ac_params(sdata); 3227 } 3228 3229 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3230 { 3231 struct ieee80211_sub_if_data *sdata = link->sdata; 3232 struct ieee80211_local *local = sdata->local; 3233 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3234 struct ieee80211_tx_queue_params *params = link->tx_conf; 3235 u8 ac; 3236 3237 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3238 mlme_dbg(sdata, 3239 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3240 ac, params[ac].acm, 3241 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3242 params[ac].txop, params[ac].uapsd, 3243 ifmgd->tx_tspec[ac].downgraded); 3244 if (!ifmgd->tx_tspec[ac].downgraded && 3245 drv_conf_tx(local, link, ac, ¶ms[ac])) 3246 link_err(link, 3247 "failed to set TX queue parameters for AC %d\n", 3248 ac); 3249 } 3250 } 3251 3252 /* MLME */ 3253 static bool 3254 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3255 struct ieee80211_link_data *link, 3256 const u8 *wmm_param, size_t wmm_param_len, 3257 const struct ieee80211_mu_edca_param_set *mu_edca) 3258 { 3259 struct ieee80211_sub_if_data *sdata = link->sdata; 3260 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3261 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3262 size_t left; 3263 int count, mu_edca_count, ac; 3264 const u8 *pos; 3265 u8 uapsd_queues = 0; 3266 3267 if (!local->ops->conf_tx) 3268 return false; 3269 3270 if (local->hw.queues < IEEE80211_NUM_ACS) 3271 return false; 3272 3273 if (!wmm_param) 3274 return false; 3275 3276 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3277 return false; 3278 3279 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3280 uapsd_queues = ifmgd->uapsd_queues; 3281 3282 count = wmm_param[6] & 0x0f; 3283 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3284 * if mu_edca was preset before and now it disappeared tell 3285 * the driver about it. 3286 */ 3287 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3288 if (count == link->u.mgd.wmm_last_param_set && 3289 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3290 return false; 3291 link->u.mgd.wmm_last_param_set = count; 3292 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3293 3294 pos = wmm_param + 8; 3295 left = wmm_param_len - 8; 3296 3297 memset(¶ms, 0, sizeof(params)); 3298 3299 sdata->wmm_acm = 0; 3300 for (; left >= 4; left -= 4, pos += 4) { 3301 int aci = (pos[0] >> 5) & 0x03; 3302 int acm = (pos[0] >> 4) & 0x01; 3303 bool uapsd = false; 3304 3305 switch (aci) { 3306 case 1: /* AC_BK */ 3307 ac = IEEE80211_AC_BK; 3308 if (acm) 3309 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3310 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3311 uapsd = true; 3312 params[ac].mu_edca = !!mu_edca; 3313 if (mu_edca) 3314 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3315 break; 3316 case 2: /* AC_VI */ 3317 ac = IEEE80211_AC_VI; 3318 if (acm) 3319 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3320 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3321 uapsd = true; 3322 params[ac].mu_edca = !!mu_edca; 3323 if (mu_edca) 3324 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3325 break; 3326 case 3: /* AC_VO */ 3327 ac = IEEE80211_AC_VO; 3328 if (acm) 3329 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3330 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3331 uapsd = true; 3332 params[ac].mu_edca = !!mu_edca; 3333 if (mu_edca) 3334 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3335 break; 3336 case 0: /* AC_BE */ 3337 default: 3338 ac = IEEE80211_AC_BE; 3339 if (acm) 3340 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3341 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3342 uapsd = true; 3343 params[ac].mu_edca = !!mu_edca; 3344 if (mu_edca) 3345 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3346 break; 3347 } 3348 3349 params[ac].aifs = pos[0] & 0x0f; 3350 3351 if (params[ac].aifs < 2) { 3352 link_info(link, 3353 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3354 params[ac].aifs, aci); 3355 params[ac].aifs = 2; 3356 } 3357 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3358 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3359 params[ac].txop = get_unaligned_le16(pos + 2); 3360 params[ac].acm = acm; 3361 params[ac].uapsd = uapsd; 3362 3363 if (params[ac].cw_min == 0 || 3364 params[ac].cw_min > params[ac].cw_max) { 3365 link_info(link, 3366 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3367 params[ac].cw_min, params[ac].cw_max, aci); 3368 return false; 3369 } 3370 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3371 } 3372 3373 /* WMM specification requires all 4 ACIs. */ 3374 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3375 if (params[ac].cw_min == 0) { 3376 link_info(link, 3377 "AP has invalid WMM params (missing AC %d), using defaults\n", 3378 ac); 3379 return false; 3380 } 3381 } 3382 3383 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3384 link->tx_conf[ac] = params[ac]; 3385 3386 ieee80211_mgd_set_link_qos_params(link); 3387 3388 /* enable WMM or activate new settings */ 3389 link->conf->qos = true; 3390 return true; 3391 } 3392 3393 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3394 { 3395 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3396 3397 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3398 ieee80211_run_deferred_scan(sdata->local); 3399 } 3400 3401 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3402 { 3403 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3404 3405 __ieee80211_stop_poll(sdata); 3406 } 3407 3408 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3409 u16 capab, bool erp_valid, u8 erp) 3410 { 3411 struct ieee80211_bss_conf *bss_conf = link->conf; 3412 struct ieee80211_supported_band *sband; 3413 u64 changed = 0; 3414 bool use_protection; 3415 bool use_short_preamble; 3416 bool use_short_slot; 3417 3418 sband = ieee80211_get_link_sband(link); 3419 if (!sband) 3420 return changed; 3421 3422 if (erp_valid) { 3423 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3424 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3425 } else { 3426 use_protection = false; 3427 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3428 } 3429 3430 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3431 if (sband->band == NL80211_BAND_5GHZ || 3432 sband->band == NL80211_BAND_6GHZ) 3433 use_short_slot = true; 3434 3435 if (use_protection != bss_conf->use_cts_prot) { 3436 bss_conf->use_cts_prot = use_protection; 3437 changed |= BSS_CHANGED_ERP_CTS_PROT; 3438 } 3439 3440 if (use_short_preamble != bss_conf->use_short_preamble) { 3441 bss_conf->use_short_preamble = use_short_preamble; 3442 changed |= BSS_CHANGED_ERP_PREAMBLE; 3443 } 3444 3445 if (use_short_slot != bss_conf->use_short_slot) { 3446 bss_conf->use_short_slot = use_short_slot; 3447 changed |= BSS_CHANGED_ERP_SLOT; 3448 } 3449 3450 return changed; 3451 } 3452 3453 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3454 struct cfg80211_bss *cbss) 3455 { 3456 struct ieee80211_sub_if_data *sdata = link->sdata; 3457 struct ieee80211_bss_conf *bss_conf = link->conf; 3458 struct ieee80211_bss *bss = (void *)cbss->priv; 3459 u64 changed = BSS_CHANGED_QOS; 3460 3461 /* not really used in MLO */ 3462 sdata->u.mgd.beacon_timeout = 3463 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3464 bss_conf->beacon_int)); 3465 3466 changed |= ieee80211_handle_bss_capability(link, 3467 bss_conf->assoc_capability, 3468 bss->has_erp_value, 3469 bss->erp_value); 3470 3471 ieee80211_check_rate_mask(link); 3472 3473 link->conf->bss = cbss; 3474 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3475 3476 if (sdata->vif.p2p || 3477 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3478 const struct cfg80211_bss_ies *ies; 3479 3480 rcu_read_lock(); 3481 ies = rcu_dereference(cbss->ies); 3482 if (ies) { 3483 int ret; 3484 3485 ret = cfg80211_get_p2p_attr( 3486 ies->data, ies->len, 3487 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3488 (u8 *) &bss_conf->p2p_noa_attr, 3489 sizeof(bss_conf->p2p_noa_attr)); 3490 if (ret >= 2) { 3491 link->u.mgd.p2p_noa_index = 3492 bss_conf->p2p_noa_attr.index; 3493 changed |= BSS_CHANGED_P2P_PS; 3494 } 3495 } 3496 rcu_read_unlock(); 3497 } 3498 3499 if (link->u.mgd.have_beacon) { 3500 bss_conf->beacon_rate = bss->beacon_rate; 3501 changed |= BSS_CHANGED_BEACON_INFO; 3502 } else { 3503 bss_conf->beacon_rate = NULL; 3504 } 3505 3506 /* Tell the driver to monitor connection quality (if supported) */ 3507 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3508 bss_conf->cqm_rssi_thold) 3509 changed |= BSS_CHANGED_CQM; 3510 3511 return changed; 3512 } 3513 3514 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3515 struct ieee80211_mgd_assoc_data *assoc_data, 3516 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3517 { 3518 struct ieee80211_local *local = sdata->local; 3519 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3520 u64 vif_changed = BSS_CHANGED_ASSOC; 3521 unsigned int link_id; 3522 3523 lockdep_assert_wiphy(local->hw.wiphy); 3524 3525 sdata->u.mgd.associated = true; 3526 3527 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3528 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3529 struct ieee80211_link_data *link; 3530 3531 if (!cbss || 3532 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3533 continue; 3534 3535 if (ieee80211_vif_is_mld(&sdata->vif) && 3536 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3537 continue; 3538 3539 link = sdata_dereference(sdata->link[link_id], sdata); 3540 if (WARN_ON(!link)) 3541 return; 3542 3543 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3544 } 3545 3546 /* just to be sure */ 3547 ieee80211_stop_poll(sdata); 3548 3549 ieee80211_led_assoc(local, 1); 3550 3551 vif_cfg->assoc = 1; 3552 3553 /* Enable ARP filtering */ 3554 if (vif_cfg->arp_addr_cnt) 3555 vif_changed |= BSS_CHANGED_ARP_FILTER; 3556 3557 if (ieee80211_vif_is_mld(&sdata->vif)) { 3558 for (link_id = 0; 3559 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3560 link_id++) { 3561 struct ieee80211_link_data *link; 3562 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3563 3564 if (!cbss || 3565 !(BIT(link_id) & 3566 ieee80211_vif_usable_links(&sdata->vif)) || 3567 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3568 continue; 3569 3570 link = sdata_dereference(sdata->link[link_id], sdata); 3571 if (WARN_ON(!link)) 3572 return; 3573 3574 ieee80211_link_info_change_notify(sdata, link, 3575 changed[link_id]); 3576 3577 ieee80211_recalc_smps(sdata, link); 3578 } 3579 3580 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3581 } else { 3582 ieee80211_bss_info_change_notify(sdata, 3583 vif_changed | changed[0]); 3584 } 3585 3586 ieee80211_recalc_ps(local); 3587 3588 /* leave this here to not change ordering in non-MLO cases */ 3589 if (!ieee80211_vif_is_mld(&sdata->vif)) 3590 ieee80211_recalc_smps(sdata, &sdata->deflink); 3591 ieee80211_recalc_ps_vif(sdata); 3592 3593 netif_carrier_on(sdata->dev); 3594 } 3595 3596 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3597 u16 stype, u16 reason, bool tx, 3598 u8 *frame_buf) 3599 { 3600 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3601 struct ieee80211_local *local = sdata->local; 3602 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3603 unsigned int link_id; 3604 u64 changed = 0; 3605 struct ieee80211_prep_tx_info info = { 3606 .subtype = stype, 3607 .was_assoc = true, 3608 .link_id = ffs(sdata->vif.active_links) - 1, 3609 }; 3610 3611 lockdep_assert_wiphy(local->hw.wiphy); 3612 3613 if (WARN_ON(!ap_sta)) 3614 return; 3615 3616 if (WARN_ON_ONCE(tx && !frame_buf)) 3617 return; 3618 3619 if (WARN_ON(!ifmgd->associated)) 3620 return; 3621 3622 ieee80211_stop_poll(sdata); 3623 3624 ifmgd->associated = false; 3625 3626 /* other links will be destroyed */ 3627 sdata->deflink.conf->bss = NULL; 3628 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 3629 3630 netif_carrier_off(sdata->dev); 3631 3632 /* 3633 * if we want to get out of ps before disassoc (why?) we have 3634 * to do it before sending disassoc, as otherwise the null-packet 3635 * won't be valid. 3636 */ 3637 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3638 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3639 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3640 } 3641 local->ps_sdata = NULL; 3642 3643 /* disable per-vif ps */ 3644 ieee80211_recalc_ps_vif(sdata); 3645 3646 /* make sure ongoing transmission finishes */ 3647 synchronize_net(); 3648 3649 /* 3650 * drop any frame before deauth/disassoc, this can be data or 3651 * management frame. Since we are disconnecting, we should not 3652 * insist sending these frames which can take time and delay 3653 * the disconnection and possible the roaming. 3654 */ 3655 if (tx) 3656 ieee80211_flush_queues(local, sdata, true); 3657 3658 /* deauthenticate/disassociate now */ 3659 if (tx || frame_buf) { 3660 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3661 3662 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 3663 sdata->vif.cfg.ap_addr, stype, 3664 reason, tx, frame_buf); 3665 } 3666 3667 /* flush out frame - make sure the deauth was actually sent */ 3668 if (tx) 3669 ieee80211_flush_queues(local, sdata, false); 3670 3671 drv_mgd_complete_tx(sdata->local, sdata, &info); 3672 3673 /* clear AP addr only after building the needed mgmt frames */ 3674 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3675 eth_zero_addr(sdata->vif.cfg.ap_addr); 3676 3677 sdata->vif.cfg.ssid_len = 0; 3678 3679 /* Remove TDLS peers */ 3680 __sta_info_flush(sdata, false, -1, ap_sta); 3681 3682 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 3683 /* Only move the AP state */ 3684 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 3685 } else { 3686 /* Remove AP peer */ 3687 sta_info_flush(sdata, -1); 3688 } 3689 3690 /* finally reset all BSS / config parameters */ 3691 if (!ieee80211_vif_is_mld(&sdata->vif)) 3692 changed |= ieee80211_reset_erp_info(sdata); 3693 3694 ieee80211_led_assoc(local, 0); 3695 changed |= BSS_CHANGED_ASSOC; 3696 sdata->vif.cfg.assoc = false; 3697 3698 sdata->deflink.u.mgd.p2p_noa_index = -1; 3699 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 3700 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 3701 3702 /* on the next assoc, re-program HT/VHT parameters */ 3703 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 3704 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 3705 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 3706 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 3707 3708 /* 3709 * reset MU-MIMO ownership and group data in default link, 3710 * if used, other links are destroyed 3711 */ 3712 memset(sdata->vif.bss_conf.mu_group.membership, 0, 3713 sizeof(sdata->vif.bss_conf.mu_group.membership)); 3714 memset(sdata->vif.bss_conf.mu_group.position, 0, 3715 sizeof(sdata->vif.bss_conf.mu_group.position)); 3716 if (!ieee80211_vif_is_mld(&sdata->vif)) 3717 changed |= BSS_CHANGED_MU_GROUPS; 3718 sdata->vif.bss_conf.mu_mimo_owner = false; 3719 3720 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3721 3722 del_timer_sync(&local->dynamic_ps_timer); 3723 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 3724 3725 /* Disable ARP filtering */ 3726 if (sdata->vif.cfg.arp_addr_cnt) 3727 changed |= BSS_CHANGED_ARP_FILTER; 3728 3729 sdata->vif.bss_conf.qos = false; 3730 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3731 changed |= BSS_CHANGED_QOS; 3732 /* The BSSID (not really interesting) and HT changed */ 3733 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3734 ieee80211_bss_info_change_notify(sdata, changed); 3735 } else { 3736 ieee80211_vif_cfg_change_notify(sdata, changed); 3737 } 3738 3739 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 3740 /* 3741 * After notifying the driver about the disassoc, 3742 * remove the ap sta. 3743 */ 3744 sta_info_flush(sdata, -1); 3745 } 3746 3747 /* disassociated - set to defaults now */ 3748 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3749 3750 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3751 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3752 del_timer_sync(&sdata->u.mgd.timer); 3753 3754 sdata->vif.bss_conf.dtim_period = 0; 3755 sdata->vif.bss_conf.beacon_rate = NULL; 3756 3757 sdata->deflink.u.mgd.have_beacon = false; 3758 sdata->deflink.u.mgd.tracking_signal_avg = false; 3759 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3760 3761 ifmgd->flags = 0; 3762 3763 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3764 struct ieee80211_link_data *link; 3765 3766 link = sdata_dereference(sdata->link[link_id], sdata); 3767 if (!link) 3768 continue; 3769 ieee80211_link_release_channel(link); 3770 } 3771 3772 sdata->vif.bss_conf.csa_active = false; 3773 sdata->deflink.u.mgd.csa.blocked_tx = false; 3774 sdata->deflink.u.mgd.csa.waiting_bcn = false; 3775 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 3776 ieee80211_vif_unblock_queues_csa(sdata); 3777 3778 /* existing TX TSPEC sessions no longer exist */ 3779 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3780 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 3781 3782 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 3783 sdata->vif.bss_conf.pwr_reduction = 0; 3784 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 3785 3786 sdata->vif.cfg.eml_cap = 0; 3787 sdata->vif.cfg.eml_med_sync_delay = 0; 3788 sdata->vif.cfg.mld_capa_op = 0; 3789 3790 memset(&sdata->u.mgd.ttlm_info, 0, 3791 sizeof(sdata->u.mgd.ttlm_info)); 3792 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 3793 3794 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 3795 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3796 &ifmgd->neg_ttlm_timeout_work); 3797 3798 sdata->u.mgd.removed_links = 0; 3799 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3800 &sdata->u.mgd.ml_reconf_work); 3801 3802 wiphy_work_cancel(sdata->local->hw.wiphy, 3803 &ifmgd->teardown_ttlm_work); 3804 3805 ieee80211_vif_set_links(sdata, 0, 0); 3806 3807 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 3808 } 3809 3810 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3811 { 3812 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3813 struct ieee80211_local *local = sdata->local; 3814 3815 lockdep_assert_wiphy(local->hw.wiphy); 3816 3817 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3818 return; 3819 3820 __ieee80211_stop_poll(sdata); 3821 3822 ieee80211_recalc_ps(local); 3823 3824 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3825 return; 3826 3827 /* 3828 * We've received a probe response, but are not sure whether 3829 * we have or will be receiving any beacons or data, so let's 3830 * schedule the timers again, just in case. 3831 */ 3832 ieee80211_sta_reset_beacon_monitor(sdata); 3833 3834 mod_timer(&ifmgd->conn_mon_timer, 3835 round_jiffies_up(jiffies + 3836 IEEE80211_CONNECTION_IDLE_TIME)); 3837 } 3838 3839 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3840 struct ieee80211_hdr *hdr, 3841 u16 tx_time) 3842 { 3843 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3844 u16 tid; 3845 int ac; 3846 struct ieee80211_sta_tx_tspec *tx_tspec; 3847 unsigned long now = jiffies; 3848 3849 if (!ieee80211_is_data_qos(hdr->frame_control)) 3850 return; 3851 3852 tid = ieee80211_get_tid(hdr); 3853 ac = ieee80211_ac_from_tid(tid); 3854 tx_tspec = &ifmgd->tx_tspec[ac]; 3855 3856 if (likely(!tx_tspec->admitted_time)) 3857 return; 3858 3859 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3860 tx_tspec->consumed_tx_time = 0; 3861 tx_tspec->time_slice_start = now; 3862 3863 if (tx_tspec->downgraded) { 3864 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3865 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3866 &ifmgd->tx_tspec_wk, 0); 3867 } 3868 } 3869 3870 if (tx_tspec->downgraded) 3871 return; 3872 3873 tx_tspec->consumed_tx_time += tx_time; 3874 3875 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3876 tx_tspec->downgraded = true; 3877 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3878 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3879 &ifmgd->tx_tspec_wk, 0); 3880 } 3881 } 3882 3883 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3884 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3885 { 3886 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3887 3888 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3889 !sdata->u.mgd.probe_send_count) 3890 return; 3891 3892 if (ack) 3893 sdata->u.mgd.probe_send_count = 0; 3894 else 3895 sdata->u.mgd.nullfunc_failed = true; 3896 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3897 } 3898 3899 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3900 const u8 *src, const u8 *dst, 3901 const u8 *ssid, size_t ssid_len, 3902 struct ieee80211_channel *channel) 3903 { 3904 struct sk_buff *skb; 3905 3906 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3907 ssid, ssid_len, NULL, 0, 3908 IEEE80211_PROBE_FLAG_DIRECTED); 3909 if (skb) 3910 ieee80211_tx_skb(sdata, skb); 3911 } 3912 3913 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3914 { 3915 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3916 u8 *dst = sdata->vif.cfg.ap_addr; 3917 u8 unicast_limit = max(1, max_probe_tries - 3); 3918 struct sta_info *sta; 3919 3920 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3921 3922 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 3923 return; 3924 3925 /* 3926 * Try sending broadcast probe requests for the last three 3927 * probe requests after the first ones failed since some 3928 * buggy APs only support broadcast probe requests. 3929 */ 3930 if (ifmgd->probe_send_count >= unicast_limit) 3931 dst = NULL; 3932 3933 /* 3934 * When the hardware reports an accurate Tx ACK status, it's 3935 * better to send a nullfunc frame instead of a probe request, 3936 * as it will kick us off the AP quickly if we aren't associated 3937 * anymore. The timeout will be reset if the frame is ACKed by 3938 * the AP. 3939 */ 3940 ifmgd->probe_send_count++; 3941 3942 if (dst) { 3943 sta = sta_info_get(sdata, dst); 3944 if (!WARN_ON(!sta)) 3945 ieee80211_check_fast_rx(sta); 3946 } 3947 3948 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3949 ifmgd->nullfunc_failed = false; 3950 ieee80211_send_nullfunc(sdata->local, sdata, false); 3951 } else { 3952 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3953 sdata->vif.cfg.ssid, 3954 sdata->vif.cfg.ssid_len, 3955 sdata->deflink.conf->bss->channel); 3956 } 3957 3958 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3959 run_again(sdata, ifmgd->probe_timeout); 3960 } 3961 3962 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3963 bool beacon) 3964 { 3965 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3966 bool already = false; 3967 3968 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3969 3970 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 3971 return; 3972 3973 if (!ieee80211_sdata_running(sdata)) 3974 return; 3975 3976 if (!ifmgd->associated) 3977 return; 3978 3979 if (sdata->local->tmp_channel || sdata->local->scanning) 3980 return; 3981 3982 if (sdata->local->suspending) { 3983 /* reschedule after resume */ 3984 ieee80211_reset_ap_probe(sdata); 3985 return; 3986 } 3987 3988 if (beacon) { 3989 mlme_dbg_ratelimited(sdata, 3990 "detected beacon loss from AP (missed %d beacons) - probing\n", 3991 beacon_loss_count); 3992 3993 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3994 } 3995 3996 /* 3997 * The driver/our work has already reported this event or the 3998 * connection monitoring has kicked in and we have already sent 3999 * a probe request. Or maybe the AP died and the driver keeps 4000 * reporting until we disassociate... 4001 * 4002 * In either case we have to ignore the current call to this 4003 * function (except for setting the correct probe reason bit) 4004 * because otherwise we would reset the timer every time and 4005 * never check whether we received a probe response! 4006 */ 4007 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4008 already = true; 4009 4010 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4011 4012 if (already) 4013 return; 4014 4015 ieee80211_recalc_ps(sdata->local); 4016 4017 ifmgd->probe_send_count = 0; 4018 ieee80211_mgd_probe_ap_send(sdata); 4019 } 4020 4021 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4022 struct ieee80211_vif *vif) 4023 { 4024 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4026 struct cfg80211_bss *cbss; 4027 struct sk_buff *skb; 4028 const struct element *ssid; 4029 int ssid_len; 4030 4031 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4032 4033 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4034 ieee80211_vif_is_mld(&sdata->vif))) 4035 return NULL; 4036 4037 if (ifmgd->associated) 4038 cbss = sdata->deflink.conf->bss; 4039 else if (ifmgd->auth_data) 4040 cbss = ifmgd->auth_data->bss; 4041 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4042 cbss = ifmgd->assoc_data->link[0].bss; 4043 else 4044 return NULL; 4045 4046 rcu_read_lock(); 4047 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4048 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4049 "invalid SSID element (len=%d)", 4050 ssid ? ssid->datalen : -1)) 4051 ssid_len = 0; 4052 else 4053 ssid_len = ssid->datalen; 4054 4055 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4056 (u32) -1, cbss->channel, 4057 ssid->data, ssid_len, 4058 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4059 rcu_read_unlock(); 4060 4061 return skb; 4062 } 4063 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4064 4065 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4066 const u8 *buf, size_t len, bool tx, 4067 u16 reason, bool reconnect) 4068 { 4069 struct ieee80211_event event = { 4070 .type = MLME_EVENT, 4071 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4072 .u.mlme.reason = reason, 4073 }; 4074 4075 if (tx) 4076 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4077 else 4078 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4079 4080 drv_event_callback(sdata->local, sdata, &event); 4081 } 4082 4083 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4084 { 4085 struct ieee80211_local *local = sdata->local; 4086 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4087 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4088 bool tx = false; 4089 4090 lockdep_assert_wiphy(local->hw.wiphy); 4091 4092 if (!ifmgd->associated) 4093 return; 4094 4095 /* only transmit if we have a link that makes that worthwhile */ 4096 for (unsigned int link_id = 0; 4097 link_id < ARRAY_SIZE(sdata->link); 4098 link_id++) { 4099 struct ieee80211_link_data *link; 4100 4101 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4102 continue; 4103 4104 link = sdata_dereference(sdata->link[link_id], sdata); 4105 if (WARN_ON_ONCE(!link)) 4106 continue; 4107 4108 if (link->u.mgd.csa.blocked_tx) 4109 continue; 4110 4111 tx = true; 4112 break; 4113 } 4114 4115 if (!ifmgd->driver_disconnect) { 4116 unsigned int link_id; 4117 4118 /* 4119 * AP is probably out of range (or not reachable for another 4120 * reason) so remove the bss structs for that AP. In the case 4121 * of multi-link, it's not clear that all of them really are 4122 * out of range, but if they weren't the driver likely would 4123 * have switched to just have a single link active? 4124 */ 4125 for (link_id = 0; 4126 link_id < ARRAY_SIZE(sdata->link); 4127 link_id++) { 4128 struct ieee80211_link_data *link; 4129 4130 link = sdata_dereference(sdata->link[link_id], sdata); 4131 if (!link) 4132 continue; 4133 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4134 link->conf->bss = NULL; 4135 } 4136 } 4137 4138 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4139 ifmgd->driver_disconnect ? 4140 WLAN_REASON_DEAUTH_LEAVING : 4141 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4142 tx, frame_buf); 4143 /* the other links will be destroyed */ 4144 sdata->vif.bss_conf.csa_active = false; 4145 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4146 sdata->deflink.u.mgd.csa.blocked_tx = false; 4147 ieee80211_vif_unblock_queues_csa(sdata); 4148 4149 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 4150 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4151 ifmgd->reconnect); 4152 ifmgd->reconnect = false; 4153 } 4154 4155 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4156 struct wiphy_work *work) 4157 { 4158 struct ieee80211_sub_if_data *sdata = 4159 container_of(work, struct ieee80211_sub_if_data, 4160 u.mgd.beacon_connection_loss_work); 4161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4162 4163 if (ifmgd->connection_loss) { 4164 sdata_info(sdata, "Connection to AP %pM lost\n", 4165 sdata->vif.cfg.ap_addr); 4166 __ieee80211_disconnect(sdata); 4167 ifmgd->connection_loss = false; 4168 } else if (ifmgd->driver_disconnect) { 4169 sdata_info(sdata, 4170 "Driver requested disconnection from AP %pM\n", 4171 sdata->vif.cfg.ap_addr); 4172 __ieee80211_disconnect(sdata); 4173 ifmgd->driver_disconnect = false; 4174 } else { 4175 if (ifmgd->associated) 4176 sdata->deflink.u.mgd.beacon_loss_count++; 4177 ieee80211_mgd_probe_ap(sdata, true); 4178 } 4179 } 4180 4181 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4182 struct wiphy_work *work) 4183 { 4184 struct ieee80211_sub_if_data *sdata = 4185 container_of(work, struct ieee80211_sub_if_data, 4186 u.mgd.csa_connection_drop_work); 4187 4188 __ieee80211_disconnect(sdata); 4189 } 4190 4191 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4192 { 4193 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4194 struct ieee80211_hw *hw = &sdata->local->hw; 4195 4196 trace_api_beacon_loss(sdata); 4197 4198 sdata->u.mgd.connection_loss = false; 4199 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4200 } 4201 EXPORT_SYMBOL(ieee80211_beacon_loss); 4202 4203 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4204 { 4205 struct ieee80211_sub_if_data *sdata; 4206 struct ieee80211_hw *hw; 4207 4208 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4209 4210 sdata = vif_to_sdata(vif); 4211 hw = &sdata->local->hw; 4212 4213 trace_api_connection_loss(sdata); 4214 4215 sdata->u.mgd.connection_loss = true; 4216 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4217 } 4218 EXPORT_SYMBOL(ieee80211_connection_loss); 4219 4220 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4221 { 4222 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4223 struct ieee80211_hw *hw = &sdata->local->hw; 4224 4225 trace_api_disconnect(sdata, reconnect); 4226 4227 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4228 return; 4229 4230 sdata->u.mgd.driver_disconnect = true; 4231 sdata->u.mgd.reconnect = reconnect; 4232 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4233 } 4234 EXPORT_SYMBOL(ieee80211_disconnect); 4235 4236 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4237 bool assoc) 4238 { 4239 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4240 4241 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4242 4243 if (!assoc) { 4244 /* 4245 * we are not authenticated yet, the only timer that could be 4246 * running is the timeout for the authentication response which 4247 * which is not relevant anymore. 4248 */ 4249 del_timer_sync(&sdata->u.mgd.timer); 4250 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4251 4252 /* other links are destroyed */ 4253 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4254 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4255 BSS_CHANGED_BSSID); 4256 sdata->u.mgd.flags = 0; 4257 4258 ieee80211_link_release_channel(&sdata->deflink); 4259 ieee80211_vif_set_links(sdata, 0, 0); 4260 } 4261 4262 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4263 kfree(auth_data); 4264 sdata->u.mgd.auth_data = NULL; 4265 } 4266 4267 enum assoc_status { 4268 ASSOC_SUCCESS, 4269 ASSOC_REJECTED, 4270 ASSOC_TIMEOUT, 4271 ASSOC_ABANDON, 4272 }; 4273 4274 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4275 enum assoc_status status) 4276 { 4277 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4278 4279 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4280 4281 if (status != ASSOC_SUCCESS) { 4282 /* 4283 * we are not associated yet, the only timer that could be 4284 * running is the timeout for the association response which 4285 * which is not relevant anymore. 4286 */ 4287 del_timer_sync(&sdata->u.mgd.timer); 4288 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4289 4290 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4291 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4292 BSS_CHANGED_BSSID); 4293 sdata->u.mgd.flags = 0; 4294 sdata->vif.bss_conf.mu_mimo_owner = false; 4295 4296 if (status != ASSOC_REJECTED) { 4297 struct cfg80211_assoc_failure data = { 4298 .timeout = status == ASSOC_TIMEOUT, 4299 }; 4300 int i; 4301 4302 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4303 ARRAY_SIZE(assoc_data->link)); 4304 4305 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4306 data.bss[i] = assoc_data->link[i].bss; 4307 4308 if (ieee80211_vif_is_mld(&sdata->vif)) 4309 data.ap_mld_addr = assoc_data->ap_addr; 4310 4311 cfg80211_assoc_failure(sdata->dev, &data); 4312 } 4313 4314 ieee80211_link_release_channel(&sdata->deflink); 4315 ieee80211_vif_set_links(sdata, 0, 0); 4316 } 4317 4318 kfree(assoc_data); 4319 sdata->u.mgd.assoc_data = NULL; 4320 } 4321 4322 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4323 struct ieee80211_mgmt *mgmt, size_t len) 4324 { 4325 struct ieee80211_local *local = sdata->local; 4326 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4327 const struct element *challenge; 4328 u8 *pos; 4329 u32 tx_flags = 0; 4330 struct ieee80211_prep_tx_info info = { 4331 .subtype = IEEE80211_STYPE_AUTH, 4332 .link_id = auth_data->link_id, 4333 }; 4334 4335 pos = mgmt->u.auth.variable; 4336 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4337 len - (pos - (u8 *)mgmt)); 4338 if (!challenge) 4339 return; 4340 auth_data->expected_transaction = 4; 4341 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4342 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4343 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4344 IEEE80211_TX_INTFL_MLME_CONN_TX; 4345 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4346 (void *)challenge, 4347 challenge->datalen + sizeof(*challenge), 4348 auth_data->ap_addr, auth_data->ap_addr, 4349 auth_data->key, auth_data->key_len, 4350 auth_data->key_idx, tx_flags); 4351 } 4352 4353 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4354 { 4355 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4356 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4357 struct sta_info *sta; 4358 4359 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4360 4361 sdata_info(sdata, "authenticated\n"); 4362 ifmgd->auth_data->done = true; 4363 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4364 ifmgd->auth_data->timeout_started = true; 4365 run_again(sdata, ifmgd->auth_data->timeout); 4366 4367 /* move station state to auth */ 4368 sta = sta_info_get(sdata, ap_addr); 4369 if (!sta) { 4370 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4371 return false; 4372 } 4373 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4374 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4375 return false; 4376 } 4377 4378 return true; 4379 } 4380 4381 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4382 struct ieee80211_mgmt *mgmt, size_t len) 4383 { 4384 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4385 u16 auth_alg, auth_transaction, status_code; 4386 struct ieee80211_event event = { 4387 .type = MLME_EVENT, 4388 .u.mlme.data = AUTH_EVENT, 4389 }; 4390 struct ieee80211_prep_tx_info info = { 4391 .subtype = IEEE80211_STYPE_AUTH, 4392 }; 4393 4394 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4395 4396 if (len < 24 + 6) 4397 return; 4398 4399 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4400 return; 4401 4402 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4403 return; 4404 4405 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4406 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4407 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4408 4409 if (auth_alg != ifmgd->auth_data->algorithm || 4410 (auth_alg != WLAN_AUTH_SAE && 4411 auth_transaction != ifmgd->auth_data->expected_transaction) || 4412 (auth_alg == WLAN_AUTH_SAE && 4413 (auth_transaction < ifmgd->auth_data->expected_transaction || 4414 auth_transaction > 2))) { 4415 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4416 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4417 auth_transaction, 4418 ifmgd->auth_data->expected_transaction); 4419 goto notify_driver; 4420 } 4421 4422 if (status_code != WLAN_STATUS_SUCCESS) { 4423 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4424 4425 if (auth_alg == WLAN_AUTH_SAE && 4426 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4427 (auth_transaction == 1 && 4428 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4429 status_code == WLAN_STATUS_SAE_PK)))) { 4430 /* waiting for userspace now */ 4431 ifmgd->auth_data->waiting = true; 4432 ifmgd->auth_data->timeout = 4433 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4434 ifmgd->auth_data->timeout_started = true; 4435 run_again(sdata, ifmgd->auth_data->timeout); 4436 goto notify_driver; 4437 } 4438 4439 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4440 mgmt->sa, status_code); 4441 ieee80211_destroy_auth_data(sdata, false); 4442 event.u.mlme.status = MLME_DENIED; 4443 event.u.mlme.reason = status_code; 4444 drv_event_callback(sdata->local, sdata, &event); 4445 goto notify_driver; 4446 } 4447 4448 switch (ifmgd->auth_data->algorithm) { 4449 case WLAN_AUTH_OPEN: 4450 case WLAN_AUTH_LEAP: 4451 case WLAN_AUTH_FT: 4452 case WLAN_AUTH_SAE: 4453 case WLAN_AUTH_FILS_SK: 4454 case WLAN_AUTH_FILS_SK_PFS: 4455 case WLAN_AUTH_FILS_PK: 4456 break; 4457 case WLAN_AUTH_SHARED_KEY: 4458 if (ifmgd->auth_data->expected_transaction != 4) { 4459 ieee80211_auth_challenge(sdata, mgmt, len); 4460 /* need another frame */ 4461 return; 4462 } 4463 break; 4464 default: 4465 WARN_ONCE(1, "invalid auth alg %d", 4466 ifmgd->auth_data->algorithm); 4467 goto notify_driver; 4468 } 4469 4470 event.u.mlme.status = MLME_SUCCESS; 4471 info.success = 1; 4472 drv_event_callback(sdata->local, sdata, &event); 4473 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4474 (auth_transaction == 2 && 4475 ifmgd->auth_data->expected_transaction == 2)) { 4476 if (!ieee80211_mark_sta_auth(sdata)) 4477 return; /* ignore frame -- wait for timeout */ 4478 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4479 auth_transaction == 2) { 4480 sdata_info(sdata, "SAE peer confirmed\n"); 4481 ifmgd->auth_data->peer_confirmed = true; 4482 } 4483 4484 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4485 notify_driver: 4486 drv_mgd_complete_tx(sdata->local, sdata, &info); 4487 } 4488 4489 #define case_WLAN(type) \ 4490 case WLAN_REASON_##type: return #type 4491 4492 const char *ieee80211_get_reason_code_string(u16 reason_code) 4493 { 4494 switch (reason_code) { 4495 case_WLAN(UNSPECIFIED); 4496 case_WLAN(PREV_AUTH_NOT_VALID); 4497 case_WLAN(DEAUTH_LEAVING); 4498 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4499 case_WLAN(DISASSOC_AP_BUSY); 4500 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4501 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4502 case_WLAN(DISASSOC_STA_HAS_LEFT); 4503 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4504 case_WLAN(DISASSOC_BAD_POWER); 4505 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4506 case_WLAN(INVALID_IE); 4507 case_WLAN(MIC_FAILURE); 4508 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4509 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4510 case_WLAN(IE_DIFFERENT); 4511 case_WLAN(INVALID_GROUP_CIPHER); 4512 case_WLAN(INVALID_PAIRWISE_CIPHER); 4513 case_WLAN(INVALID_AKMP); 4514 case_WLAN(UNSUPP_RSN_VERSION); 4515 case_WLAN(INVALID_RSN_IE_CAP); 4516 case_WLAN(IEEE8021X_FAILED); 4517 case_WLAN(CIPHER_SUITE_REJECTED); 4518 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4519 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4520 case_WLAN(DISASSOC_LOW_ACK); 4521 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4522 case_WLAN(QSTA_LEAVE_QBSS); 4523 case_WLAN(QSTA_NOT_USE); 4524 case_WLAN(QSTA_REQUIRE_SETUP); 4525 case_WLAN(QSTA_TIMEOUT); 4526 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4527 case_WLAN(MESH_PEER_CANCELED); 4528 case_WLAN(MESH_MAX_PEERS); 4529 case_WLAN(MESH_CONFIG); 4530 case_WLAN(MESH_CLOSE); 4531 case_WLAN(MESH_MAX_RETRIES); 4532 case_WLAN(MESH_CONFIRM_TIMEOUT); 4533 case_WLAN(MESH_INVALID_GTK); 4534 case_WLAN(MESH_INCONSISTENT_PARAM); 4535 case_WLAN(MESH_INVALID_SECURITY); 4536 case_WLAN(MESH_PATH_ERROR); 4537 case_WLAN(MESH_PATH_NOFORWARD); 4538 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4539 case_WLAN(MAC_EXISTS_IN_MBSS); 4540 case_WLAN(MESH_CHAN_REGULATORY); 4541 case_WLAN(MESH_CHAN); 4542 default: return "<unknown>"; 4543 } 4544 } 4545 4546 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4547 struct ieee80211_mgmt *mgmt, size_t len) 4548 { 4549 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4550 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4551 4552 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4553 4554 if (len < 24 + 2) 4555 return; 4556 4557 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4558 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4559 return; 4560 } 4561 4562 if (ifmgd->associated && 4563 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4564 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4565 sdata->vif.cfg.ap_addr, reason_code, 4566 ieee80211_get_reason_code_string(reason_code)); 4567 4568 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4569 4570 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4571 reason_code, false); 4572 return; 4573 } 4574 4575 if (ifmgd->assoc_data && 4576 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4577 sdata_info(sdata, 4578 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4579 ifmgd->assoc_data->ap_addr, reason_code, 4580 ieee80211_get_reason_code_string(reason_code)); 4581 4582 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4583 4584 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4585 return; 4586 } 4587 } 4588 4589 4590 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4591 struct ieee80211_mgmt *mgmt, size_t len) 4592 { 4593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4594 u16 reason_code; 4595 4596 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4597 4598 if (len < 24 + 2) 4599 return; 4600 4601 if (!ifmgd->associated || 4602 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 4603 return; 4604 4605 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 4606 4607 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4608 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4609 return; 4610 } 4611 4612 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 4613 sdata->vif.cfg.ap_addr, reason_code, 4614 ieee80211_get_reason_code_string(reason_code)); 4615 4616 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4617 4618 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 4619 false); 4620 } 4621 4622 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 4623 u8 *supp_rates, unsigned int supp_rates_len, 4624 u32 *rates, u32 *basic_rates, 4625 bool *have_higher_than_11mbit, 4626 int *min_rate, int *min_rate_index) 4627 { 4628 int i, j; 4629 4630 for (i = 0; i < supp_rates_len; i++) { 4631 int rate = supp_rates[i] & 0x7f; 4632 bool is_basic = !!(supp_rates[i] & 0x80); 4633 4634 if ((rate * 5) > 110) 4635 *have_higher_than_11mbit = true; 4636 4637 /* 4638 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 4639 * selectors since they're not rates. 4640 * 4641 * Note: Even though the membership selector and the basic 4642 * rate flag share the same bit, they are not exactly 4643 * the same. 4644 */ 4645 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 4646 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 4647 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 4648 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 4649 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 4650 continue; 4651 4652 for (j = 0; j < sband->n_bitrates; j++) { 4653 struct ieee80211_rate *br; 4654 int brate; 4655 4656 br = &sband->bitrates[j]; 4657 4658 brate = DIV_ROUND_UP(br->bitrate, 5); 4659 if (brate == rate) { 4660 *rates |= BIT(j); 4661 if (is_basic) 4662 *basic_rates |= BIT(j); 4663 if ((rate * 5) < *min_rate) { 4664 *min_rate = rate * 5; 4665 *min_rate_index = j; 4666 } 4667 break; 4668 } 4669 } 4670 } 4671 } 4672 4673 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 4674 struct ieee80211_supported_band *sband, 4675 const struct link_sta_info *link_sta, 4676 const struct ieee802_11_elems *elems) 4677 { 4678 const struct ieee80211_sta_he_cap *own_he_cap = 4679 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4680 4681 if (elems->ext_capab_len < 10) 4682 return false; 4683 4684 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 4685 return false; 4686 4687 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 4688 IEEE80211_HE_MAC_CAP0_TWT_RES && 4689 own_he_cap && 4690 (own_he_cap->he_cap_elem.mac_cap_info[0] & 4691 IEEE80211_HE_MAC_CAP0_TWT_REQ); 4692 } 4693 4694 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 4695 struct ieee80211_supported_band *sband, 4696 struct ieee80211_link_data *link, 4697 struct link_sta_info *link_sta, 4698 struct ieee802_11_elems *elems) 4699 { 4700 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 4701 4702 if (link->conf->twt_requester != twt) { 4703 link->conf->twt_requester = twt; 4704 return BSS_CHANGED_TWT; 4705 } 4706 return 0; 4707 } 4708 4709 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 4710 struct ieee80211_bss_conf *bss_conf, 4711 struct ieee80211_supported_band *sband, 4712 struct link_sta_info *link_sta) 4713 { 4714 const struct ieee80211_sta_he_cap *own_he_cap = 4715 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4716 4717 return bss_conf->he_support && 4718 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 4719 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 4720 own_he_cap && 4721 (own_he_cap->he_cap_elem.mac_cap_info[2] & 4722 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 4723 } 4724 4725 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 4726 struct link_sta_info *link_sta, 4727 struct cfg80211_bss *cbss, 4728 struct ieee80211_mgmt *mgmt, 4729 const u8 *elem_start, 4730 unsigned int elem_len, 4731 u64 *changed) 4732 { 4733 struct ieee80211_sub_if_data *sdata = link->sdata; 4734 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4735 struct ieee80211_bss_conf *bss_conf = link->conf; 4736 struct ieee80211_local *local = sdata->local; 4737 unsigned int link_id = link->link_id; 4738 struct ieee80211_elems_parse_params parse_params = { 4739 .mode = link->u.mgd.conn.mode, 4740 .start = elem_start, 4741 .len = elem_len, 4742 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4743 .from_ap = true, 4744 }; 4745 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4746 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4747 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4748 const struct cfg80211_bss_ies *bss_ies = NULL; 4749 struct ieee80211_supported_band *sband; 4750 struct ieee802_11_elems *elems; 4751 const __le16 prof_bss_param_ch_present = 4752 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 4753 u16 capab_info; 4754 bool ret; 4755 4756 elems = ieee802_11_parse_elems_full(&parse_params); 4757 if (!elems) 4758 return false; 4759 4760 if (link_id == assoc_data->assoc_link_id) { 4761 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4762 4763 /* 4764 * we should not get to this flow unless the association was 4765 * successful, so set the status directly to success 4766 */ 4767 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4768 if (elems->ml_basic) { 4769 int bss_param_ch_cnt = 4770 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 4771 4772 if (bss_param_ch_cnt < 0) { 4773 ret = false; 4774 goto out; 4775 } 4776 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 4777 bss_conf->bss_param_ch_cnt_link_id = link_id; 4778 } 4779 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 4780 !elems->prof || 4781 !(elems->prof->control & prof_bss_param_ch_present)) { 4782 ret = false; 4783 goto out; 4784 } else { 4785 const u8 *ptr = elems->prof->variable + 4786 elems->prof->sta_info_len - 1; 4787 int bss_param_ch_cnt; 4788 4789 /* 4790 * During parsing, we validated that these fields exist, 4791 * otherwise elems->prof would have been set to NULL. 4792 */ 4793 capab_info = get_unaligned_le16(ptr); 4794 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4795 bss_param_ch_cnt = 4796 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4797 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 4798 bss_conf->bss_param_ch_cnt_link_id = link_id; 4799 4800 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4801 link_info(link, "association response status code=%u\n", 4802 assoc_data->link[link_id].status); 4803 ret = true; 4804 goto out; 4805 } 4806 } 4807 4808 if (!is_s1g && !elems->supp_rates) { 4809 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4810 ret = false; 4811 goto out; 4812 } 4813 4814 link->u.mgd.tdls_chan_switch_prohibited = 4815 elems->ext_capab && elems->ext_capab_len >= 5 && 4816 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4817 4818 /* 4819 * Some APs are erroneously not including some information in their 4820 * (re)association response frames. Try to recover by using the data 4821 * from the beacon or probe response. This seems to afflict mobile 4822 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4823 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4824 */ 4825 if (!is_6ghz && 4826 ((assoc_data->wmm && !elems->wmm_param) || 4827 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4828 (!elems->ht_cap_elem || !elems->ht_operation)) || 4829 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4830 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4831 const struct cfg80211_bss_ies *ies; 4832 struct ieee802_11_elems *bss_elems; 4833 4834 rcu_read_lock(); 4835 ies = rcu_dereference(cbss->ies); 4836 if (ies) 4837 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4838 GFP_ATOMIC); 4839 rcu_read_unlock(); 4840 if (!bss_ies) { 4841 ret = false; 4842 goto out; 4843 } 4844 4845 parse_params.start = bss_ies->data; 4846 parse_params.len = bss_ies->len; 4847 parse_params.bss = cbss; 4848 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4849 if (!bss_elems) { 4850 ret = false; 4851 goto out; 4852 } 4853 4854 if (assoc_data->wmm && 4855 !elems->wmm_param && bss_elems->wmm_param) { 4856 elems->wmm_param = bss_elems->wmm_param; 4857 sdata_info(sdata, 4858 "AP bug: WMM param missing from AssocResp\n"); 4859 } 4860 4861 /* 4862 * Also check if we requested HT/VHT, otherwise the AP doesn't 4863 * have to include the IEs in the (re)association response. 4864 */ 4865 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4866 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4867 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4868 sdata_info(sdata, 4869 "AP bug: HT capability missing from AssocResp\n"); 4870 } 4871 if (!elems->ht_operation && bss_elems->ht_operation && 4872 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4873 elems->ht_operation = bss_elems->ht_operation; 4874 sdata_info(sdata, 4875 "AP bug: HT operation missing from AssocResp\n"); 4876 } 4877 4878 if (is_5ghz) { 4879 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4880 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4881 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4882 sdata_info(sdata, 4883 "AP bug: VHT capa missing from AssocResp\n"); 4884 } 4885 4886 if (!elems->vht_operation && bss_elems->vht_operation && 4887 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4888 elems->vht_operation = bss_elems->vht_operation; 4889 sdata_info(sdata, 4890 "AP bug: VHT operation missing from AssocResp\n"); 4891 } 4892 } 4893 kfree(bss_elems); 4894 } 4895 4896 /* 4897 * We previously checked these in the beacon/probe response, so 4898 * they should be present here. This is just a safety net. 4899 * Note that the ieee80211_config_bw() below would also check 4900 * for this (and more), but this has better error reporting. 4901 */ 4902 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4903 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4904 sdata_info(sdata, 4905 "HT AP is missing WMM params or HT capability/operation\n"); 4906 ret = false; 4907 goto out; 4908 } 4909 4910 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4911 (!elems->vht_cap_elem || !elems->vht_operation)) { 4912 sdata_info(sdata, 4913 "VHT AP is missing VHT capability/operation\n"); 4914 ret = false; 4915 goto out; 4916 } 4917 4918 /* check/update if AP changed anything in assoc response vs. scan */ 4919 if (ieee80211_config_bw(link, elems, 4920 link_id == assoc_data->assoc_link_id, 4921 changed)) { 4922 ret = false; 4923 goto out; 4924 } 4925 4926 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 4927 ret = false; 4928 goto out; 4929 } 4930 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 4931 4932 /* Set up internal HT/VHT capabilities */ 4933 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 4934 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4935 elems->ht_cap_elem, 4936 link_sta); 4937 4938 if (elems->vht_cap_elem && 4939 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4940 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 4941 const struct cfg80211_bss_ies *ies; 4942 4943 /* 4944 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 4945 * too large maximum MPDU length in the association response 4946 * (indicating 12k) that it cannot actually process ... 4947 * Work around that. 4948 */ 4949 rcu_read_lock(); 4950 ies = rcu_dereference(cbss->ies); 4951 if (ies) { 4952 const struct element *elem; 4953 4954 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 4955 ies->data, ies->len); 4956 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 4957 bss_vht_cap = (const void *)elem->data; 4958 } 4959 4960 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4961 elems->vht_cap_elem, 4962 bss_vht_cap, link_sta); 4963 rcu_read_unlock(); 4964 } 4965 4966 if (elems->he_operation && 4967 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 4968 elems->he_cap) { 4969 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4970 elems->he_cap, 4971 elems->he_cap_len, 4972 elems->he_6ghz_capa, 4973 link_sta); 4974 4975 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4976 if (elems->rsnx && elems->rsnx_len && 4977 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4978 wiphy_ext_feature_isset(local->hw.wiphy, 4979 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4980 bss_conf->twt_protected = true; 4981 else 4982 bss_conf->twt_protected = false; 4983 4984 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4985 link_sta, elems); 4986 4987 if (elems->eht_operation && elems->eht_cap && 4988 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 4989 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4990 elems->he_cap, 4991 elems->he_cap_len, 4992 elems->eht_cap, 4993 elems->eht_cap_len, 4994 link_sta); 4995 4996 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4997 } else { 4998 bss_conf->eht_support = false; 4999 } 5000 } else { 5001 bss_conf->he_support = false; 5002 bss_conf->twt_requester = false; 5003 bss_conf->twt_protected = false; 5004 bss_conf->eht_support = false; 5005 } 5006 5007 bss_conf->twt_broadcast = 5008 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5009 5010 if (bss_conf->he_support) { 5011 bss_conf->he_bss_color.color = 5012 le32_get_bits(elems->he_operation->he_oper_params, 5013 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5014 bss_conf->he_bss_color.partial = 5015 le32_get_bits(elems->he_operation->he_oper_params, 5016 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5017 bss_conf->he_bss_color.enabled = 5018 !le32_get_bits(elems->he_operation->he_oper_params, 5019 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5020 5021 if (bss_conf->he_bss_color.enabled) 5022 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5023 5024 bss_conf->htc_trig_based_pkt_ext = 5025 le32_get_bits(elems->he_operation->he_oper_params, 5026 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5027 bss_conf->frame_time_rts_th = 5028 le32_get_bits(elems->he_operation->he_oper_params, 5029 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5030 5031 bss_conf->uora_exists = !!elems->uora_element; 5032 if (elems->uora_element) 5033 bss_conf->uora_ocw_range = elems->uora_element[0]; 5034 5035 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5036 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5037 /* TODO: OPEN: what happens if BSS color disable is set? */ 5038 } 5039 5040 if (cbss->transmitted_bss) { 5041 bss_conf->nontransmitted = true; 5042 ether_addr_copy(bss_conf->transmitter_bssid, 5043 cbss->transmitted_bss->bssid); 5044 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5045 bss_conf->bssid_index = cbss->bssid_index; 5046 } 5047 5048 /* 5049 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5050 * in their association response, so ignore that data for our own 5051 * configuration. If it changed since the last beacon, we'll get the 5052 * next beacon and update then. 5053 */ 5054 5055 /* 5056 * If an operating mode notification IE is present, override the 5057 * NSS calculation (that would be done in rate_control_rate_init()) 5058 * and use the # of streams from that element. 5059 */ 5060 if (elems->opmode_notif && 5061 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5062 u8 nss; 5063 5064 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5065 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5066 nss += 1; 5067 link_sta->pub->rx_nss = nss; 5068 } 5069 5070 /* 5071 * Always handle WMM once after association regardless 5072 * of the first value the AP uses. Setting -1 here has 5073 * that effect because the AP values is an unsigned 5074 * 4-bit value. 5075 */ 5076 link->u.mgd.wmm_last_param_set = -1; 5077 link->u.mgd.mu_edca_last_param_set = -1; 5078 5079 if (link->u.mgd.disable_wmm_tracking) { 5080 ieee80211_set_wmm_default(link, false, false); 5081 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5082 elems->wmm_param_len, 5083 elems->mu_edca_param_set)) { 5084 /* still enable QoS since we might have HT/VHT */ 5085 ieee80211_set_wmm_default(link, false, true); 5086 /* disable WMM tracking in this case to disable 5087 * tracking WMM parameter changes in the beacon if 5088 * the parameters weren't actually valid. Doing so 5089 * avoids changing parameters very strangely when 5090 * the AP is going back and forth between valid and 5091 * invalid parameters. 5092 */ 5093 link->u.mgd.disable_wmm_tracking = true; 5094 } 5095 5096 if (elems->max_idle_period_ie) { 5097 bss_conf->max_idle_period = 5098 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5099 bss_conf->protected_keep_alive = 5100 !!(elems->max_idle_period_ie->idle_options & 5101 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5102 *changed |= BSS_CHANGED_KEEP_ALIVE; 5103 } else { 5104 bss_conf->max_idle_period = 0; 5105 bss_conf->protected_keep_alive = false; 5106 } 5107 5108 /* set assoc capability (AID was already set earlier), 5109 * ieee80211_set_associated() will tell the driver */ 5110 bss_conf->assoc_capability = capab_info; 5111 5112 ret = true; 5113 out: 5114 kfree(elems); 5115 kfree(bss_ies); 5116 return ret; 5117 } 5118 5119 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5120 struct sta_info *sta, 5121 struct link_sta_info *link_sta, 5122 struct cfg80211_bss *cbss) 5123 { 5124 struct ieee80211_sub_if_data *sdata = link->sdata; 5125 struct ieee80211_local *local = sdata->local; 5126 struct ieee80211_bss *bss = (void *)cbss->priv; 5127 u32 rates = 0, basic_rates = 0; 5128 bool have_higher_than_11mbit = false; 5129 int min_rate = INT_MAX, min_rate_index = -1; 5130 struct ieee80211_supported_band *sband; 5131 5132 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5133 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5134 5135 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5136 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5137 ieee80211_s1g_sta_rate_init(sta); 5138 return 0; 5139 } 5140 5141 sband = local->hw.wiphy->bands[cbss->channel->band]; 5142 5143 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5144 &rates, &basic_rates, &have_higher_than_11mbit, 5145 &min_rate, &min_rate_index); 5146 5147 /* 5148 * This used to be a workaround for basic rates missing 5149 * in the association response frame. Now that we no 5150 * longer use the basic rates from there, it probably 5151 * doesn't happen any more, but keep the workaround so 5152 * in case some *other* APs are buggy in different ways 5153 * we can connect -- with a warning. 5154 * Allow this workaround only in case the AP provided at least 5155 * one rate. 5156 */ 5157 if (min_rate_index < 0) { 5158 link_info(link, "No legacy rates in association response\n"); 5159 return -EINVAL; 5160 } else if (!basic_rates) { 5161 link_info(link, "No basic rates, using min rate instead\n"); 5162 basic_rates = BIT(min_rate_index); 5163 } 5164 5165 if (rates) 5166 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5167 else 5168 link_info(link, "No rates found, keeping mandatory only\n"); 5169 5170 link->conf->basic_rates = basic_rates; 5171 5172 /* cf. IEEE 802.11 9.2.12 */ 5173 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5174 have_higher_than_11mbit; 5175 5176 return 0; 5177 } 5178 5179 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5180 struct cfg80211_bss *cbss) 5181 { 5182 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5183 const struct element *ht_cap_elem, *vht_cap_elem; 5184 const struct cfg80211_bss_ies *ies; 5185 const struct ieee80211_ht_cap *ht_cap; 5186 const struct ieee80211_vht_cap *vht_cap; 5187 const struct ieee80211_he_cap_elem *he_cap; 5188 const struct element *he_cap_elem; 5189 u16 mcs_80_map, mcs_160_map; 5190 int i, mcs_nss_size; 5191 bool support_160; 5192 u8 chains = 1; 5193 5194 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5195 return chains; 5196 5197 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5198 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5199 ht_cap = (void *)ht_cap_elem->data; 5200 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5201 /* 5202 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5203 * "Tx Unequal Modulation Supported" fields. 5204 */ 5205 } 5206 5207 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5208 return chains; 5209 5210 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5211 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5212 u8 nss; 5213 u16 tx_mcs_map; 5214 5215 vht_cap = (void *)vht_cap_elem->data; 5216 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5217 for (nss = 8; nss > 0; nss--) { 5218 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5219 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5220 break; 5221 } 5222 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5223 chains = max(chains, nss); 5224 } 5225 5226 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5227 return chains; 5228 5229 ies = rcu_dereference(cbss->ies); 5230 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5231 ies->data, ies->len); 5232 5233 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5234 return chains; 5235 5236 /* skip one byte ext_tag_id */ 5237 he_cap = (void *)(he_cap_elem->data + 1); 5238 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5239 5240 /* invalid HE IE */ 5241 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5242 return chains; 5243 5244 /* mcs_nss is right after he_cap info */ 5245 he_mcs_nss_supp = (void *)(he_cap + 1); 5246 5247 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5248 5249 for (i = 7; i >= 0; i--) { 5250 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5251 5252 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5253 chains = max_t(u8, chains, i + 1); 5254 break; 5255 } 5256 } 5257 5258 support_160 = he_cap->phy_cap_info[0] & 5259 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5260 5261 if (!support_160) 5262 return chains; 5263 5264 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5265 for (i = 7; i >= 0; i--) { 5266 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5267 5268 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5269 chains = max_t(u8, chains, i + 1); 5270 break; 5271 } 5272 } 5273 5274 return chains; 5275 } 5276 5277 static void 5278 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5279 struct ieee80211_supported_band *sband, 5280 struct cfg80211_assoc_request *req, 5281 bool wmm_used, int link_id, 5282 struct ieee80211_conn_settings *conn) 5283 { 5284 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5285 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5286 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5287 const struct ieee80211_sta_he_cap *he_cap; 5288 const struct ieee80211_sta_eht_cap *eht_cap; 5289 struct ieee80211_sta_vht_cap vht_cap; 5290 5291 if (sband->band == NL80211_BAND_S1GHZ) { 5292 conn->mode = IEEE80211_CONN_MODE_S1G; 5293 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5294 mlme_dbg(sdata, "operating as S1G STA\n"); 5295 return; 5296 } 5297 5298 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5299 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5300 5301 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5302 5303 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5304 mlme_link_id_dbg(sdata, link_id, 5305 "HT disabled by flag, limiting to legacy\n"); 5306 goto out; 5307 } 5308 5309 if (!wmm_used) { 5310 mlme_link_id_dbg(sdata, link_id, 5311 "WMM/QoS not supported, limiting to legacy\n"); 5312 goto out; 5313 } 5314 5315 if (req) { 5316 unsigned int i; 5317 5318 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5319 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5320 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5321 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5322 netdev_info(sdata->dev, 5323 "WEP/TKIP use, limiting to legacy\n"); 5324 goto out; 5325 } 5326 } 5327 } 5328 5329 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5330 mlme_link_id_dbg(sdata, link_id, 5331 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5332 goto out; 5333 } 5334 5335 /* HT is fine */ 5336 conn->mode = IEEE80211_CONN_MODE_HT; 5337 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5338 IEEE80211_CONN_BW_LIMIT_40 : 5339 IEEE80211_CONN_BW_LIMIT_20; 5340 5341 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5342 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5343 5344 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5345 mlme_link_id_dbg(sdata, link_id, 5346 "VHT disabled by flag, limiting to HT\n"); 5347 goto out; 5348 } 5349 5350 if (vht_cap.vht_supported && is_5ghz) { 5351 bool have_80mhz = false; 5352 unsigned int i; 5353 5354 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5355 mlme_link_id_dbg(sdata, link_id, 5356 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5357 goto out; 5358 } 5359 5360 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5361 for (i = 0; i < sband->n_channels; i++) { 5362 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5363 IEEE80211_CHAN_NO_80MHZ)) 5364 continue; 5365 5366 have_80mhz = true; 5367 break; 5368 } 5369 5370 if (!have_80mhz) { 5371 mlme_link_id_dbg(sdata, link_id, 5372 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5373 goto out; 5374 } 5375 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5376 mlme_link_id_dbg(sdata, link_id, 5377 "no VHT support on 5 GHz, limiting to HT\n"); 5378 goto out; 5379 } 5380 5381 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5382 if (sband->band != NL80211_BAND_2GHZ) { 5383 conn->mode = IEEE80211_CONN_MODE_VHT; 5384 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5385 } 5386 5387 if (is_5ghz && 5388 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5389 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5390 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5391 mlme_link_id_dbg(sdata, link_id, 5392 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5393 } 5394 5395 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5396 mlme_link_id_dbg(sdata, link_id, 5397 "HE disabled by flag, limiting to HT/VHT\n"); 5398 goto out; 5399 } 5400 5401 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5402 if (!he_cap) { 5403 WARN_ON(is_6ghz); 5404 mlme_link_id_dbg(sdata, link_id, 5405 "no HE support, limiting to HT/VHT\n"); 5406 goto out; 5407 } 5408 5409 /* so we have HE */ 5410 conn->mode = IEEE80211_CONN_MODE_HE; 5411 5412 /* check bandwidth */ 5413 switch (sband->band) { 5414 default: 5415 case NL80211_BAND_2GHZ: 5416 if (he_cap->he_cap_elem.phy_cap_info[0] & 5417 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5418 break; 5419 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5420 mlme_link_id_dbg(sdata, link_id, 5421 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5422 break; 5423 case NL80211_BAND_5GHZ: 5424 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5425 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5426 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5427 mlme_link_id_dbg(sdata, link_id, 5428 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5429 break; 5430 } 5431 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5432 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5433 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5434 conn->bw_limit, 5435 IEEE80211_CONN_BW_LIMIT_80); 5436 mlme_link_id_dbg(sdata, link_id, 5437 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5438 } 5439 break; 5440 case NL80211_BAND_6GHZ: 5441 if (he_cap->he_cap_elem.phy_cap_info[0] & 5442 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5443 break; 5444 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5445 conn->bw_limit, 5446 IEEE80211_CONN_BW_LIMIT_80); 5447 mlme_link_id_dbg(sdata, link_id, 5448 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5449 break; 5450 } 5451 5452 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5453 mlme_link_id_dbg(sdata, link_id, 5454 "EHT disabled by flag, limiting to HE\n"); 5455 goto out; 5456 } 5457 5458 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5459 if (!eht_cap) { 5460 mlme_link_id_dbg(sdata, link_id, 5461 "no EHT support, limiting to HE\n"); 5462 goto out; 5463 } 5464 5465 /* we have EHT */ 5466 5467 conn->mode = IEEE80211_CONN_MODE_EHT; 5468 5469 /* check bandwidth */ 5470 if (is_6ghz && 5471 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5472 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5473 else if (is_6ghz) 5474 mlme_link_id_dbg(sdata, link_id, 5475 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5476 5477 out: 5478 mlme_link_id_dbg(sdata, link_id, 5479 "determined local STA to be %s, BW limited to %d MHz\n", 5480 ieee80211_conn_mode_str(conn->mode), 5481 20 * (1 << conn->bw_limit)); 5482 } 5483 5484 static void 5485 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5486 struct ieee80211_supported_band *sband, 5487 struct cfg80211_auth_request *req, 5488 bool wmm_used, 5489 struct ieee80211_conn_settings *conn) 5490 { 5491 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5492 req->link_id > 0 ? req->link_id : 0, 5493 conn); 5494 } 5495 5496 static void 5497 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5498 struct ieee80211_supported_band *sband, 5499 struct cfg80211_assoc_request *req, 5500 bool wmm_used, int link_id, 5501 struct ieee80211_conn_settings *conn) 5502 { 5503 struct ieee80211_conn_settings tmp; 5504 5505 WARN_ON(!req); 5506 5507 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5508 &tmp); 5509 5510 conn->mode = min_t(enum ieee80211_conn_mode, 5511 conn->mode, tmp.mode); 5512 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5513 conn->bw_limit, tmp.bw_limit); 5514 } 5515 5516 static enum ieee80211_ap_reg_power 5517 ieee80211_ap_power_type(u8 control) 5518 { 5519 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 5520 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 5521 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 5522 return IEEE80211_REG_LPI_AP; 5523 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 5524 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 5525 return IEEE80211_REG_SP_AP; 5526 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 5527 return IEEE80211_REG_VLP_AP; 5528 default: 5529 return IEEE80211_REG_UNSET_AP; 5530 } 5531 } 5532 5533 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5534 struct ieee80211_link_data *link, 5535 int link_id, 5536 struct cfg80211_bss *cbss, bool mlo, 5537 struct ieee80211_conn_settings *conn) 5538 { 5539 struct ieee80211_local *local = sdata->local; 5540 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5541 struct ieee80211_chan_req chanreq = {}; 5542 struct cfg80211_chan_def ap_chandef; 5543 struct ieee802_11_elems *elems; 5544 int ret; 5545 5546 lockdep_assert_wiphy(local->hw.wiphy); 5547 5548 rcu_read_lock(); 5549 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 5550 &chanreq, &ap_chandef); 5551 5552 if (IS_ERR(elems)) { 5553 rcu_read_unlock(); 5554 return PTR_ERR(elems); 5555 } 5556 5557 if (mlo && !elems->ml_basic) { 5558 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5559 rcu_read_unlock(); 5560 kfree(elems); 5561 return -EINVAL; 5562 } 5563 5564 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 5565 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 5566 5567 if (elems->pwr_constr_elem) 5568 link->conf->pwr_reduction = *elems->pwr_constr_elem; 5569 5570 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 5571 if (he_6ghz_oper) 5572 link->conf->power_type = 5573 ieee80211_ap_power_type(he_6ghz_oper->control); 5574 else 5575 link_info(link, 5576 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 5577 cbss->channel->center_freq); 5578 5579 link->conf->tpe = elems->tpe; 5580 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 5581 &chanreq.oper); 5582 } 5583 rcu_read_unlock(); 5584 /* the element data was RCU protected so no longer valid anyway */ 5585 kfree(elems); 5586 elems = NULL; 5587 5588 if (!link) 5589 return 0; 5590 5591 rcu_read_lock(); 5592 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 5593 local->rx_chains); 5594 rcu_read_unlock(); 5595 5596 /* 5597 * If this fails (possibly due to channel context sharing 5598 * on incompatible channels, e.g. 80+80 and 160 sharing the 5599 * same control channel) try to use a smaller bandwidth. 5600 */ 5601 ret = ieee80211_link_use_channel(link, &chanreq, 5602 IEEE80211_CHANCTX_SHARED); 5603 5604 /* don't downgrade for 5 and 10 MHz channels, though. */ 5605 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 5606 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 5607 return ret; 5608 5609 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 5610 ieee80211_chanreq_downgrade(&chanreq, conn); 5611 5612 ret = ieee80211_link_use_channel(link, &chanreq, 5613 IEEE80211_CHANCTX_SHARED); 5614 } 5615 5616 return ret; 5617 } 5618 5619 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5620 u8 *dtim_count, u8 *dtim_period) 5621 { 5622 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5623 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5624 ies->len); 5625 const struct ieee80211_tim_ie *tim = NULL; 5626 const struct ieee80211_bssid_index *idx; 5627 bool valid = tim_ie && tim_ie[1] >= 2; 5628 5629 if (valid) 5630 tim = (void *)(tim_ie + 2); 5631 5632 if (dtim_count) 5633 *dtim_count = valid ? tim->dtim_count : 0; 5634 5635 if (dtim_period) 5636 *dtim_period = valid ? tim->dtim_period : 0; 5637 5638 /* Check if value is overridden by non-transmitted profile */ 5639 if (!idx_ie || idx_ie[1] < 3) 5640 return valid; 5641 5642 idx = (void *)(idx_ie + 2); 5643 5644 if (dtim_count) 5645 *dtim_count = idx->dtim_count; 5646 5647 if (dtim_period) 5648 *dtim_period = idx->dtim_period; 5649 5650 return true; 5651 } 5652 5653 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5654 struct ieee80211_mgmt *mgmt, 5655 struct ieee802_11_elems *elems, 5656 const u8 *elem_start, unsigned int elem_len) 5657 { 5658 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5659 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5660 struct ieee80211_local *local = sdata->local; 5661 unsigned int link_id; 5662 struct sta_info *sta; 5663 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5664 u16 valid_links = 0, dormant_links = 0; 5665 int err; 5666 5667 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5668 /* 5669 * station info was already allocated and inserted before 5670 * the association and should be available to us 5671 */ 5672 sta = sta_info_get(sdata, assoc_data->ap_addr); 5673 if (WARN_ON(!sta)) 5674 goto out_err; 5675 5676 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 5677 5678 if (ieee80211_vif_is_mld(&sdata->vif)) { 5679 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5680 if (!assoc_data->link[link_id].bss) 5681 continue; 5682 5683 valid_links |= BIT(link_id); 5684 if (assoc_data->link[link_id].disabled) 5685 dormant_links |= BIT(link_id); 5686 5687 if (link_id != assoc_data->assoc_link_id) { 5688 err = ieee80211_sta_allocate_link(sta, link_id); 5689 if (err) 5690 goto out_err; 5691 } 5692 } 5693 5694 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5695 } 5696 5697 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5698 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5699 struct ieee80211_link_data *link; 5700 struct link_sta_info *link_sta; 5701 5702 if (!cbss) 5703 continue; 5704 5705 link = sdata_dereference(sdata->link[link_id], sdata); 5706 if (WARN_ON(!link)) 5707 goto out_err; 5708 5709 if (ieee80211_vif_is_mld(&sdata->vif)) 5710 link_info(link, 5711 "local address %pM, AP link address %pM%s\n", 5712 link->conf->addr, 5713 assoc_data->link[link_id].bss->bssid, 5714 link_id == assoc_data->assoc_link_id ? 5715 " (assoc)" : ""); 5716 5717 link_sta = rcu_dereference_protected(sta->link[link_id], 5718 lockdep_is_held(&local->hw.wiphy->mtx)); 5719 if (WARN_ON(!link_sta)) 5720 goto out_err; 5721 5722 if (!link->u.mgd.have_beacon) { 5723 const struct cfg80211_bss_ies *ies; 5724 5725 rcu_read_lock(); 5726 ies = rcu_dereference(cbss->beacon_ies); 5727 if (ies) 5728 link->u.mgd.have_beacon = true; 5729 else 5730 ies = rcu_dereference(cbss->ies); 5731 ieee80211_get_dtim(ies, 5732 &link->conf->sync_dtim_count, 5733 &link->u.mgd.dtim_period); 5734 link->conf->beacon_int = cbss->beacon_interval; 5735 rcu_read_unlock(); 5736 } 5737 5738 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5739 5740 if (link_id != assoc_data->assoc_link_id) { 5741 link->u.mgd.conn = assoc_data->link[link_id].conn; 5742 5743 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 5744 true, &link->u.mgd.conn); 5745 if (err) { 5746 link_info(link, "prep_channel failed\n"); 5747 goto out_err; 5748 } 5749 } 5750 5751 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5752 assoc_data->link[link_id].bss); 5753 if (err) 5754 goto out_err; 5755 5756 if (!ieee80211_assoc_config_link(link, link_sta, 5757 assoc_data->link[link_id].bss, 5758 mgmt, elem_start, elem_len, 5759 &changed[link_id])) 5760 goto out_err; 5761 5762 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5763 valid_links &= ~BIT(link_id); 5764 ieee80211_sta_remove_link(sta, link_id); 5765 continue; 5766 } 5767 5768 if (link_id != assoc_data->assoc_link_id) { 5769 err = ieee80211_sta_activate_link(sta, link_id); 5770 if (err) 5771 goto out_err; 5772 } 5773 } 5774 5775 /* links might have changed due to rejected ones, set them again */ 5776 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5777 5778 rate_control_rate_init_all_links(sta); 5779 5780 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5781 set_sta_flag(sta, WLAN_STA_MFP); 5782 sta->sta.mfp = true; 5783 } else { 5784 sta->sta.mfp = false; 5785 } 5786 5787 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5788 elems->ext_capab_len); 5789 5790 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5791 local->hw.queues >= IEEE80211_NUM_ACS; 5792 5793 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5794 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5795 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5796 if (err) { 5797 sdata_info(sdata, 5798 "failed to move station %pM to desired state\n", 5799 sta->sta.addr); 5800 WARN_ON(__sta_info_destroy(sta)); 5801 goto out_err; 5802 } 5803 5804 if (sdata->wdev.use_4addr) 5805 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5806 5807 ieee80211_set_associated(sdata, assoc_data, changed); 5808 5809 /* 5810 * If we're using 4-addr mode, let the AP know that we're 5811 * doing so, so that it can create the STA VLAN on its side 5812 */ 5813 if (ifmgd->use_4addr) 5814 ieee80211_send_4addr_nullfunc(local, sdata); 5815 5816 /* 5817 * Start timer to probe the connection to the AP now. 5818 * Also start the timer that will detect beacon loss. 5819 */ 5820 ieee80211_sta_reset_beacon_monitor(sdata); 5821 ieee80211_sta_reset_conn_monitor(sdata); 5822 5823 return true; 5824 out_err: 5825 eth_zero_addr(sdata->vif.cfg.ap_addr); 5826 return false; 5827 } 5828 5829 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5830 struct ieee80211_mgmt *mgmt, 5831 size_t len) 5832 { 5833 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5834 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5835 u16 capab_info, status_code, aid; 5836 struct ieee80211_elems_parse_params parse_params = { 5837 .bss = NULL, 5838 .link_id = -1, 5839 .from_ap = true, 5840 }; 5841 struct ieee802_11_elems *elems; 5842 int ac; 5843 const u8 *elem_start; 5844 unsigned int elem_len; 5845 bool reassoc; 5846 struct ieee80211_event event = { 5847 .type = MLME_EVENT, 5848 .u.mlme.data = ASSOC_EVENT, 5849 }; 5850 struct ieee80211_prep_tx_info info = {}; 5851 struct cfg80211_rx_assoc_resp_data resp = { 5852 .uapsd_queues = -1, 5853 }; 5854 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5855 unsigned int link_id; 5856 5857 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5858 5859 if (!assoc_data) 5860 return; 5861 5862 parse_params.mode = 5863 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 5864 5865 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5866 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5867 return; 5868 5869 /* 5870 * AssocResp and ReassocResp have identical structure, so process both 5871 * of them in this function. 5872 */ 5873 5874 if (len < 24 + 6) 5875 return; 5876 5877 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5878 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5879 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5880 if (assoc_data->s1g) 5881 elem_start = mgmt->u.s1g_assoc_resp.variable; 5882 else 5883 elem_start = mgmt->u.assoc_resp.variable; 5884 5885 /* 5886 * Note: this may not be perfect, AP might misbehave - if 5887 * anyone needs to rely on perfect complete notification 5888 * with the exact right subtype, then we need to track what 5889 * we actually transmitted. 5890 */ 5891 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5892 IEEE80211_STYPE_ASSOC_REQ; 5893 5894 if (assoc_data->fils_kek_len && 5895 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5896 return; 5897 5898 elem_len = len - (elem_start - (u8 *)mgmt); 5899 parse_params.start = elem_start; 5900 parse_params.len = elem_len; 5901 elems = ieee802_11_parse_elems_full(&parse_params); 5902 if (!elems) 5903 goto notify_driver; 5904 5905 if (elems->aid_resp) 5906 aid = le16_to_cpu(elems->aid_resp->aid); 5907 else if (assoc_data->s1g) 5908 aid = 0; /* TODO */ 5909 else 5910 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5911 5912 /* 5913 * The 5 MSB of the AID field are reserved 5914 * (802.11-2016 9.4.1.8 AID field) 5915 */ 5916 aid &= 0x7ff; 5917 5918 sdata_info(sdata, 5919 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5920 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5921 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5922 5923 ifmgd->broken_ap = false; 5924 5925 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5926 elems->timeout_int && 5927 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5928 u32 tu, ms; 5929 5930 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5931 le32_to_cpu(elems->timeout_int->value)); 5932 5933 tu = le32_to_cpu(elems->timeout_int->value); 5934 ms = tu * 1024 / 1000; 5935 sdata_info(sdata, 5936 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5937 assoc_data->ap_addr, tu, ms); 5938 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5939 assoc_data->timeout_started = true; 5940 assoc_data->comeback = true; 5941 if (ms > IEEE80211_ASSOC_TIMEOUT) 5942 run_again(sdata, assoc_data->timeout); 5943 goto notify_driver; 5944 } 5945 5946 if (status_code != WLAN_STATUS_SUCCESS) { 5947 sdata_info(sdata, "%pM denied association (code=%d)\n", 5948 assoc_data->ap_addr, status_code); 5949 event.u.mlme.status = MLME_DENIED; 5950 event.u.mlme.reason = status_code; 5951 drv_event_callback(sdata->local, sdata, &event); 5952 } else { 5953 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5954 sdata_info(sdata, 5955 "invalid AID value %d (out of range), turn off PS\n", 5956 aid); 5957 aid = 0; 5958 ifmgd->broken_ap = true; 5959 } 5960 5961 if (ieee80211_vif_is_mld(&sdata->vif)) { 5962 struct ieee80211_mle_basic_common_info *common; 5963 5964 if (!elems->ml_basic) { 5965 sdata_info(sdata, 5966 "MLO association with %pM but no (basic) multi-link element in response!\n", 5967 assoc_data->ap_addr); 5968 goto abandon_assoc; 5969 } 5970 5971 common = (void *)elems->ml_basic->variable; 5972 5973 if (memcmp(assoc_data->ap_addr, 5974 common->mld_mac_addr, ETH_ALEN)) { 5975 sdata_info(sdata, 5976 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5977 common->mld_mac_addr, 5978 assoc_data->ap_addr); 5979 goto abandon_assoc; 5980 } 5981 5982 sdata->vif.cfg.eml_cap = 5983 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 5984 sdata->vif.cfg.eml_med_sync_delay = 5985 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 5986 sdata->vif.cfg.mld_capa_op = 5987 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 5988 } 5989 5990 sdata->vif.cfg.aid = aid; 5991 5992 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5993 elem_start, elem_len)) { 5994 /* oops -- internal error -- send timeout for now */ 5995 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5996 goto notify_driver; 5997 } 5998 event.u.mlme.status = MLME_SUCCESS; 5999 drv_event_callback(sdata->local, sdata, &event); 6000 sdata_info(sdata, "associated\n"); 6001 6002 info.success = 1; 6003 } 6004 6005 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6006 struct ieee80211_link_data *link; 6007 6008 if (!assoc_data->link[link_id].bss) 6009 continue; 6010 6011 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6012 ether_addr_copy(resp.links[link_id].addr, 6013 assoc_data->link[link_id].addr); 6014 resp.links[link_id].status = assoc_data->link[link_id].status; 6015 6016 link = sdata_dereference(sdata->link[link_id], sdata); 6017 if (!link) 6018 continue; 6019 6020 /* get uapsd queues configuration - same for all links */ 6021 resp.uapsd_queues = 0; 6022 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6023 if (link->tx_conf[ac].uapsd) 6024 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6025 } 6026 6027 if (ieee80211_vif_is_mld(&sdata->vif)) { 6028 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6029 resp.ap_mld_addr = ap_mld_addr; 6030 } 6031 6032 ieee80211_destroy_assoc_data(sdata, 6033 status_code == WLAN_STATUS_SUCCESS ? 6034 ASSOC_SUCCESS : 6035 ASSOC_REJECTED); 6036 6037 resp.buf = (u8 *)mgmt; 6038 resp.len = len; 6039 resp.req_ies = ifmgd->assoc_req_ies; 6040 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6041 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6042 notify_driver: 6043 drv_mgd_complete_tx(sdata->local, sdata, &info); 6044 kfree(elems); 6045 return; 6046 abandon_assoc: 6047 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6048 goto notify_driver; 6049 } 6050 6051 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6052 struct ieee80211_mgmt *mgmt, size_t len, 6053 struct ieee80211_rx_status *rx_status) 6054 { 6055 struct ieee80211_sub_if_data *sdata = link->sdata; 6056 struct ieee80211_local *local = sdata->local; 6057 struct ieee80211_bss *bss; 6058 struct ieee80211_channel *channel; 6059 6060 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6061 6062 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6063 ieee80211_rx_status_to_khz(rx_status)); 6064 if (!channel) 6065 return; 6066 6067 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6068 if (bss) { 6069 link->conf->beacon_rate = bss->beacon_rate; 6070 ieee80211_rx_bss_put(local, bss); 6071 } 6072 } 6073 6074 6075 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6076 struct sk_buff *skb) 6077 { 6078 struct ieee80211_sub_if_data *sdata = link->sdata; 6079 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6080 struct ieee80211_if_managed *ifmgd; 6081 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6082 struct ieee80211_channel *channel; 6083 size_t baselen, len = skb->len; 6084 6085 ifmgd = &sdata->u.mgd; 6086 6087 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6088 6089 /* 6090 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6091 * "If a 6 GHz AP receives a Probe Request frame and responds with 6092 * a Probe Response frame [..], the Address 1 field of the Probe 6093 * Response frame shall be set to the broadcast address [..]" 6094 * So, on 6GHz band we should also accept broadcast responses. 6095 */ 6096 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 6097 rx_status->freq); 6098 if (!channel) 6099 return; 6100 6101 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6102 (channel->band != NL80211_BAND_6GHZ || 6103 !is_broadcast_ether_addr(mgmt->da))) 6104 return; /* ignore ProbeResp to foreign address */ 6105 6106 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6107 if (baselen > len) 6108 return; 6109 6110 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6111 6112 if (ifmgd->associated && 6113 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6114 ieee80211_reset_ap_probe(sdata); 6115 } 6116 6117 /* 6118 * This is the canonical list of information elements we care about, 6119 * the filter code also gives us all changes to the Microsoft OUI 6120 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6121 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6122 * changes to requested client power. 6123 * 6124 * We implement beacon filtering in software since that means we can 6125 * avoid processing the frame here and in cfg80211, and userspace 6126 * will not be able to tell whether the hardware supports it or not. 6127 * 6128 * XXX: This list needs to be dynamic -- userspace needs to be able to 6129 * add items it requires. It also needs to be able to tell us to 6130 * look out for other vendor IEs. 6131 */ 6132 static const u64 care_about_ies = 6133 (1ULL << WLAN_EID_COUNTRY) | 6134 (1ULL << WLAN_EID_ERP_INFO) | 6135 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6136 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6137 (1ULL << WLAN_EID_HT_CAPABILITY) | 6138 (1ULL << WLAN_EID_HT_OPERATION) | 6139 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6140 6141 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6142 struct ieee80211_if_managed *ifmgd, 6143 struct ieee80211_bss_conf *bss_conf, 6144 struct ieee80211_local *local, 6145 struct ieee80211_rx_status *rx_status) 6146 { 6147 struct ieee80211_sub_if_data *sdata = link->sdata; 6148 6149 /* Track average RSSI from the Beacon frames of the current AP */ 6150 6151 if (!link->u.mgd.tracking_signal_avg) { 6152 link->u.mgd.tracking_signal_avg = true; 6153 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6154 link->u.mgd.last_cqm_event_signal = 0; 6155 link->u.mgd.count_beacon_signal = 1; 6156 link->u.mgd.last_ave_beacon_signal = 0; 6157 } else { 6158 link->u.mgd.count_beacon_signal++; 6159 } 6160 6161 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6162 -rx_status->signal); 6163 6164 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6165 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6166 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6167 int last_sig = link->u.mgd.last_ave_beacon_signal; 6168 struct ieee80211_event event = { 6169 .type = RSSI_EVENT, 6170 }; 6171 6172 /* 6173 * if signal crosses either of the boundaries, invoke callback 6174 * with appropriate parameters 6175 */ 6176 if (sig > ifmgd->rssi_max_thold && 6177 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6178 link->u.mgd.last_ave_beacon_signal = sig; 6179 event.u.rssi.data = RSSI_EVENT_HIGH; 6180 drv_event_callback(local, sdata, &event); 6181 } else if (sig < ifmgd->rssi_min_thold && 6182 (last_sig >= ifmgd->rssi_max_thold || 6183 last_sig == 0)) { 6184 link->u.mgd.last_ave_beacon_signal = sig; 6185 event.u.rssi.data = RSSI_EVENT_LOW; 6186 drv_event_callback(local, sdata, &event); 6187 } 6188 } 6189 6190 if (bss_conf->cqm_rssi_thold && 6191 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6192 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6193 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6194 int last_event = link->u.mgd.last_cqm_event_signal; 6195 int thold = bss_conf->cqm_rssi_thold; 6196 int hyst = bss_conf->cqm_rssi_hyst; 6197 6198 if (sig < thold && 6199 (last_event == 0 || sig < last_event - hyst)) { 6200 link->u.mgd.last_cqm_event_signal = sig; 6201 ieee80211_cqm_rssi_notify( 6202 &sdata->vif, 6203 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6204 sig, GFP_KERNEL); 6205 } else if (sig > thold && 6206 (last_event == 0 || sig > last_event + hyst)) { 6207 link->u.mgd.last_cqm_event_signal = sig; 6208 ieee80211_cqm_rssi_notify( 6209 &sdata->vif, 6210 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6211 sig, GFP_KERNEL); 6212 } 6213 } 6214 6215 if (bss_conf->cqm_rssi_low && 6216 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6217 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6218 int last_event = link->u.mgd.last_cqm_event_signal; 6219 int low = bss_conf->cqm_rssi_low; 6220 int high = bss_conf->cqm_rssi_high; 6221 6222 if (sig < low && 6223 (last_event == 0 || last_event >= low)) { 6224 link->u.mgd.last_cqm_event_signal = sig; 6225 ieee80211_cqm_rssi_notify( 6226 &sdata->vif, 6227 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6228 sig, GFP_KERNEL); 6229 } else if (sig > high && 6230 (last_event == 0 || last_event <= high)) { 6231 link->u.mgd.last_cqm_event_signal = sig; 6232 ieee80211_cqm_rssi_notify( 6233 &sdata->vif, 6234 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6235 sig, GFP_KERNEL); 6236 } 6237 } 6238 } 6239 6240 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6241 struct cfg80211_bss *bss) 6242 { 6243 if (ether_addr_equal(tx_bssid, bss->bssid)) 6244 return true; 6245 if (!bss->transmitted_bss) 6246 return false; 6247 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6248 } 6249 6250 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6251 struct wiphy_work *work) 6252 { 6253 struct ieee80211_sub_if_data *sdata = 6254 container_of(work, struct ieee80211_sub_if_data, 6255 u.mgd.ml_reconf_work.work); 6256 u16 new_valid_links, new_active_links, new_dormant_links; 6257 int ret; 6258 6259 if (!sdata->u.mgd.removed_links) 6260 return; 6261 6262 sdata_info(sdata, 6263 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6264 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6265 6266 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6267 if (new_valid_links == sdata->vif.valid_links) 6268 return; 6269 6270 if (!new_valid_links || 6271 !(new_valid_links & ~sdata->vif.dormant_links)) { 6272 sdata_info(sdata, "No valid links after reconfiguration\n"); 6273 ret = -EINVAL; 6274 goto out; 6275 } 6276 6277 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6278 if (new_active_links != sdata->vif.active_links) { 6279 if (!new_active_links) 6280 new_active_links = 6281 BIT(ffs(new_valid_links & 6282 ~sdata->vif.dormant_links) - 1); 6283 6284 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6285 if (ret) { 6286 sdata_info(sdata, 6287 "Failed setting active links\n"); 6288 goto out; 6289 } 6290 } 6291 6292 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6293 6294 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6295 new_dormant_links); 6296 if (ret) 6297 sdata_info(sdata, "Failed setting valid links\n"); 6298 6299 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6300 6301 out: 6302 if (!ret) 6303 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6304 else 6305 __ieee80211_disconnect(sdata); 6306 6307 sdata->u.mgd.removed_links = 0; 6308 } 6309 6310 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6311 struct ieee802_11_elems *elems) 6312 { 6313 const struct element *sub; 6314 unsigned long removed_links = 0; 6315 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6316 u8 link_id; 6317 u32 delay; 6318 6319 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6320 return; 6321 6322 /* Directly parse the sub elements as the common information doesn't 6323 * hold any useful information. 6324 */ 6325 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6326 elems->ml_reconf_len) { 6327 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6328 u8 *pos = prof->variable; 6329 u16 control; 6330 6331 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6332 continue; 6333 6334 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6335 sub->datalen)) 6336 return; 6337 6338 control = le16_to_cpu(prof->control); 6339 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6340 6341 removed_links |= BIT(link_id); 6342 6343 /* the MAC address should not be included, but handle it */ 6344 if (control & 6345 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6346 pos += 6; 6347 6348 /* According to Draft P802.11be_D3.0, the control should 6349 * include the AP Removal Timer present. If the AP Removal Timer 6350 * is not present assume immediate removal. 6351 */ 6352 if (control & 6353 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6354 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6355 } 6356 6357 removed_links &= sdata->vif.valid_links; 6358 if (!removed_links) { 6359 /* In case the removal was cancelled, abort it */ 6360 if (sdata->u.mgd.removed_links) { 6361 sdata->u.mgd.removed_links = 0; 6362 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6363 &sdata->u.mgd.ml_reconf_work); 6364 } 6365 return; 6366 } 6367 6368 delay = 0; 6369 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6370 struct ieee80211_bss_conf *link_conf = 6371 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6372 u32 link_delay; 6373 6374 if (!link_conf) { 6375 removed_links &= ~BIT(link_id); 6376 continue; 6377 } 6378 6379 if (link_removal_timeout[link_id] < 1) 6380 link_delay = 0; 6381 else 6382 link_delay = link_conf->beacon_int * 6383 (link_removal_timeout[link_id] - 1); 6384 6385 if (!delay) 6386 delay = link_delay; 6387 else 6388 delay = min(delay, link_delay); 6389 } 6390 6391 sdata->u.mgd.removed_links = removed_links; 6392 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6393 &sdata->u.mgd.ml_reconf_work, 6394 TU_TO_JIFFIES(delay)); 6395 } 6396 6397 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6398 u16 active_links, u16 dormant_links, 6399 u16 suspended_links) 6400 { 6401 u64 changed = 0; 6402 int ret; 6403 6404 if (!active_links) { 6405 ret = -EINVAL; 6406 goto out; 6407 } 6408 6409 /* If there is an active negotiated TTLM, it should be discarded by 6410 * the new negotiated/advertised TTLM. 6411 */ 6412 if (sdata->vif.neg_ttlm.valid) { 6413 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6414 sdata->vif.suspended_links = 0; 6415 changed = BSS_CHANGED_MLD_TTLM; 6416 } 6417 6418 if (sdata->vif.active_links != active_links) { 6419 /* usable links are affected when active_links are changed, 6420 * so notify the driver about the status change 6421 */ 6422 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6423 active_links &= sdata->vif.active_links; 6424 if (!active_links) 6425 active_links = 6426 BIT(__ffs(sdata->vif.valid_links & 6427 ~dormant_links)); 6428 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6429 if (ret) { 6430 sdata_info(sdata, "Failed to set TTLM active links\n"); 6431 goto out; 6432 } 6433 } 6434 6435 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6436 dormant_links); 6437 if (ret) { 6438 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6439 goto out; 6440 } 6441 6442 sdata->vif.suspended_links = suspended_links; 6443 if (sdata->vif.suspended_links) 6444 changed |= BSS_CHANGED_MLD_TTLM; 6445 6446 ieee80211_vif_cfg_change_notify(sdata, changed); 6447 6448 out: 6449 if (ret) 6450 ieee80211_disconnect(&sdata->vif, false); 6451 6452 return ret; 6453 } 6454 6455 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6456 struct wiphy_work *work) 6457 { 6458 u16 new_active_links, new_dormant_links; 6459 struct ieee80211_sub_if_data *sdata = 6460 container_of(work, struct ieee80211_sub_if_data, 6461 u.mgd.ttlm_work.work); 6462 6463 new_active_links = sdata->u.mgd.ttlm_info.map & 6464 sdata->vif.valid_links; 6465 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6466 sdata->vif.valid_links; 6467 6468 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6469 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6470 0)) 6471 return; 6472 6473 sdata->u.mgd.ttlm_info.active = true; 6474 sdata->u.mgd.ttlm_info.switch_time = 0; 6475 } 6476 6477 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6478 { 6479 if (bm_size == 1) 6480 return *data; 6481 else 6482 return get_unaligned_le16(data); 6483 } 6484 6485 static int 6486 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6487 const struct ieee80211_ttlm_elem *ttlm, 6488 struct ieee80211_adv_ttlm_info *ttlm_info) 6489 { 6490 /* The element size was already validated in 6491 * ieee80211_tid_to_link_map_size_ok() 6492 */ 6493 u8 control, link_map_presence, map_size, tid; 6494 u8 *pos; 6495 6496 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6497 pos = (void *)ttlm->optional; 6498 control = ttlm->control; 6499 6500 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 6501 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 6502 return 0; 6503 6504 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6505 IEEE80211_TTLM_DIRECTION_BOTH) { 6506 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6507 return -EINVAL; 6508 } 6509 6510 link_map_presence = *pos; 6511 pos++; 6512 6513 ttlm_info->switch_time = get_unaligned_le16(pos); 6514 6515 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 6516 * by 1. 6517 */ 6518 if (!ttlm_info->switch_time) 6519 ttlm_info->switch_time = 1; 6520 6521 pos += 2; 6522 6523 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6524 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6525 pos += 3; 6526 } 6527 6528 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6529 map_size = 1; 6530 else 6531 map_size = 2; 6532 6533 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6534 * not advertise a TID-to-link mapping that does not map all TIDs to the 6535 * same link set, reject frame if not all links have mapping 6536 */ 6537 if (link_map_presence != 0xff) { 6538 sdata_info(sdata, 6539 "Invalid advertised T2L mapping presence indicator\n"); 6540 return -EINVAL; 6541 } 6542 6543 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6544 if (!ttlm_info->map) { 6545 sdata_info(sdata, 6546 "Invalid advertised T2L map for TID 0\n"); 6547 return -EINVAL; 6548 } 6549 6550 pos += map_size; 6551 6552 for (tid = 1; tid < 8; tid++) { 6553 u16 map = ieee80211_get_ttlm(map_size, pos); 6554 6555 if (map != ttlm_info->map) { 6556 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6557 tid); 6558 return -EINVAL; 6559 } 6560 6561 pos += map_size; 6562 } 6563 return 0; 6564 } 6565 6566 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6567 struct ieee802_11_elems *elems, 6568 u64 beacon_ts) 6569 { 6570 u8 i; 6571 int ret; 6572 6573 if (!ieee80211_vif_is_mld(&sdata->vif)) 6574 return; 6575 6576 if (!elems->ttlm_num) { 6577 if (sdata->u.mgd.ttlm_info.switch_time) { 6578 /* if a planned TID-to-link mapping was cancelled - 6579 * abort it 6580 */ 6581 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6582 &sdata->u.mgd.ttlm_work); 6583 } else if (sdata->u.mgd.ttlm_info.active) { 6584 /* if no TID-to-link element, set to default mapping in 6585 * which all TIDs are mapped to all setup links 6586 */ 6587 ret = ieee80211_vif_set_links(sdata, 6588 sdata->vif.valid_links, 6589 0); 6590 if (ret) { 6591 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6592 return; 6593 } 6594 ieee80211_vif_cfg_change_notify(sdata, 6595 BSS_CHANGED_MLD_VALID_LINKS); 6596 } 6597 memset(&sdata->u.mgd.ttlm_info, 0, 6598 sizeof(sdata->u.mgd.ttlm_info)); 6599 return; 6600 } 6601 6602 for (i = 0; i < elems->ttlm_num; i++) { 6603 struct ieee80211_adv_ttlm_info ttlm_info; 6604 u32 res; 6605 6606 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6607 &ttlm_info); 6608 6609 if (res) { 6610 __ieee80211_disconnect(sdata); 6611 return; 6612 } 6613 6614 if (ttlm_info.switch_time) { 6615 u16 beacon_ts_tu, st_tu, delay; 6616 u32 delay_jiffies; 6617 u64 mask; 6618 6619 /* The t2l map switch time is indicated with a partial 6620 * TSF value (bits 10 to 25), get the partial beacon TS 6621 * as well, and calc the delay to the start time. 6622 */ 6623 mask = GENMASK_ULL(25, 10); 6624 beacon_ts_tu = (beacon_ts & mask) >> 10; 6625 st_tu = ttlm_info.switch_time; 6626 delay = st_tu - beacon_ts_tu; 6627 6628 /* 6629 * If the switch time is far in the future, then it 6630 * could also be the previous switch still being 6631 * announced. 6632 * We can simply ignore it for now, if it is a future 6633 * switch the AP will continue to announce it anyway. 6634 */ 6635 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 6636 return; 6637 6638 delay_jiffies = TU_TO_JIFFIES(delay); 6639 6640 /* Link switching can take time, so schedule it 6641 * 100ms before to be ready on time 6642 */ 6643 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 6644 delay_jiffies -= 6645 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 6646 else 6647 delay_jiffies = 0; 6648 6649 sdata->u.mgd.ttlm_info = ttlm_info; 6650 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6651 &sdata->u.mgd.ttlm_work); 6652 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6653 &sdata->u.mgd.ttlm_work, 6654 delay_jiffies); 6655 return; 6656 } 6657 } 6658 } 6659 6660 static void 6661 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 6662 int reporting_link_id, 6663 struct ieee802_11_elems *elems) 6664 { 6665 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6666 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6667 const struct element *sub; 6668 const u8 *subelems; 6669 size_t subelems_len; 6670 u8 common_size; 6671 int link_id; 6672 6673 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 6674 return; 6675 6676 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 6677 subelems = (u8 *)elems->ml_basic + common_size; 6678 subelems_len = elems->ml_basic_len - common_size; 6679 6680 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 6681 subelems, subelems_len) { 6682 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6683 struct ieee80211_link_data *link; 6684 ssize_t len; 6685 6686 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 6687 sub->datalen)) 6688 continue; 6689 6690 link_id = le16_get_bits(prof->control, 6691 IEEE80211_MLE_STA_CONTROL_LINK_ID); 6692 /* need a valid link ID, but also not our own, both AP bugs */ 6693 if (link_id == reporting_link_id || 6694 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 6695 continue; 6696 6697 link = sdata_dereference(sdata->link[link_id], sdata); 6698 if (!link) 6699 continue; 6700 6701 len = cfg80211_defragment_element(sub, subelems, subelems_len, 6702 NULL, 0, 6703 IEEE80211_MLE_SUBELEM_FRAGMENT); 6704 if (WARN_ON(len < 0)) 6705 continue; 6706 6707 sta_profiles[link_id] = sub; 6708 sta_profiles_len[link_id] = len; 6709 } 6710 6711 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6712 struct ieee80211_mle_per_sta_profile *prof; 6713 struct ieee802_11_elems *prof_elems; 6714 struct ieee80211_link_data *link; 6715 ssize_t len; 6716 6717 if (link_id == reporting_link_id) 6718 continue; 6719 6720 link = sdata_dereference(sdata->link[link_id], sdata); 6721 if (!link) 6722 continue; 6723 6724 if (!sta_profiles[link_id]) { 6725 prof_elems = NULL; 6726 goto handle; 6727 } 6728 6729 /* we can defragment in-place, won't use the buffer again */ 6730 len = cfg80211_defragment_element(sta_profiles[link_id], 6731 subelems, subelems_len, 6732 (void *)sta_profiles[link_id], 6733 sta_profiles_len[link_id], 6734 IEEE80211_MLE_SUBELEM_FRAGMENT); 6735 if (WARN_ON(len != sta_profiles_len[link_id])) 6736 continue; 6737 6738 prof = (void *)sta_profiles[link_id]; 6739 prof_elems = ieee802_11_parse_elems(prof->variable + 6740 (prof->sta_info_len - 1), 6741 len - 6742 (prof->sta_info_len - 1), 6743 false, NULL); 6744 6745 /* memory allocation failed - let's hope that's transient */ 6746 if (!prof_elems) 6747 continue; 6748 6749 handle: 6750 /* 6751 * FIXME: the timings here are obviously incorrect, 6752 * but only older Intel drivers seem to care, and 6753 * those don't have MLO. If you really need this, 6754 * the problem is having to calculate it with the 6755 * TSF offset etc. The device_timestamp is still 6756 * correct, of course. 6757 */ 6758 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 6759 IEEE80211_CSA_SOURCE_OTHER_LINK); 6760 kfree(prof_elems); 6761 } 6762 } 6763 6764 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 6765 const struct ieee802_11_elems *elems) 6766 { 6767 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 6768 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 6769 6770 if (!elems->ssid) 6771 return false; 6772 6773 /* hidden SSID: zero length */ 6774 if (elems->ssid_len == 0) 6775 return false; 6776 6777 if (elems->ssid_len != cfg->ssid_len) 6778 return true; 6779 6780 /* hidden SSID: zeroed out */ 6781 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 6782 return false; 6783 6784 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 6785 } 6786 6787 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 6788 struct ieee80211_hdr *hdr, size_t len, 6789 struct ieee80211_rx_status *rx_status) 6790 { 6791 struct ieee80211_sub_if_data *sdata = link->sdata; 6792 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6793 struct ieee80211_bss_conf *bss_conf = link->conf; 6794 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6795 struct ieee80211_mgmt *mgmt = (void *) hdr; 6796 size_t baselen; 6797 struct ieee802_11_elems *elems; 6798 struct ieee80211_local *local = sdata->local; 6799 struct ieee80211_chanctx_conf *chanctx_conf; 6800 struct ieee80211_supported_band *sband; 6801 struct ieee80211_channel *chan; 6802 struct link_sta_info *link_sta; 6803 struct sta_info *sta; 6804 u64 changed = 0; 6805 bool erp_valid; 6806 u8 erp_value = 0; 6807 u32 ncrc = 0; 6808 u8 *bssid, *variable = mgmt->u.beacon.variable; 6809 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6810 struct ieee80211_elems_parse_params parse_params = { 6811 .mode = link->u.mgd.conn.mode, 6812 .link_id = -1, 6813 .from_ap = true, 6814 }; 6815 6816 lockdep_assert_wiphy(local->hw.wiphy); 6817 6818 /* Process beacon from the current BSS */ 6819 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 6820 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 6821 struct ieee80211_ext *ext = (void *) mgmt; 6822 6823 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 6824 variable = ext->u.s1g_short_beacon.variable; 6825 else 6826 variable = ext->u.s1g_beacon.variable; 6827 } 6828 6829 baselen = (u8 *) variable - (u8 *) mgmt; 6830 if (baselen > len) 6831 return; 6832 6833 parse_params.start = variable; 6834 parse_params.len = len - baselen; 6835 6836 rcu_read_lock(); 6837 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 6838 if (!chanctx_conf) { 6839 rcu_read_unlock(); 6840 return; 6841 } 6842 6843 if (ieee80211_rx_status_to_khz(rx_status) != 6844 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 6845 rcu_read_unlock(); 6846 return; 6847 } 6848 chan = chanctx_conf->def.chan; 6849 rcu_read_unlock(); 6850 6851 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 6852 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 6853 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 6854 parse_params.bss = ifmgd->assoc_data->link[0].bss; 6855 elems = ieee802_11_parse_elems_full(&parse_params); 6856 if (!elems) 6857 return; 6858 6859 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6860 6861 if (elems->dtim_period) 6862 link->u.mgd.dtim_period = elems->dtim_period; 6863 link->u.mgd.have_beacon = true; 6864 ifmgd->assoc_data->need_beacon = false; 6865 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6866 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6867 bss_conf->sync_tsf = 6868 le64_to_cpu(mgmt->u.beacon.timestamp); 6869 bss_conf->sync_device_ts = 6870 rx_status->device_timestamp; 6871 bss_conf->sync_dtim_count = elems->dtim_count; 6872 } 6873 6874 if (elems->mbssid_config_ie) 6875 bss_conf->profile_periodicity = 6876 elems->mbssid_config_ie->profile_periodicity; 6877 else 6878 bss_conf->profile_periodicity = 0; 6879 6880 if (elems->ext_capab_len >= 11 && 6881 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6882 bss_conf->ema_ap = true; 6883 else 6884 bss_conf->ema_ap = false; 6885 6886 /* continue assoc process */ 6887 ifmgd->assoc_data->timeout = jiffies; 6888 ifmgd->assoc_data->timeout_started = true; 6889 run_again(sdata, ifmgd->assoc_data->timeout); 6890 kfree(elems); 6891 return; 6892 } 6893 6894 if (!ifmgd->associated || 6895 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 6896 return; 6897 bssid = link->u.mgd.bssid; 6898 6899 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 6900 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 6901 local, rx_status); 6902 6903 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 6904 mlme_dbg_ratelimited(sdata, 6905 "cancelling AP probe due to a received beacon\n"); 6906 ieee80211_reset_ap_probe(sdata); 6907 } 6908 6909 /* 6910 * Push the beacon loss detection into the future since 6911 * we are processing a beacon from the AP just now. 6912 */ 6913 ieee80211_sta_reset_beacon_monitor(sdata); 6914 6915 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 6916 * element (which carries the beacon interval). Don't forget to add a 6917 * bit to care_about_ies[] above if mac80211 is interested in a 6918 * changing S1G element. 6919 */ 6920 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6921 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 6922 parse_params.bss = bss_conf->bss; 6923 parse_params.filter = care_about_ies; 6924 parse_params.crc = ncrc; 6925 elems = ieee802_11_parse_elems_full(&parse_params); 6926 if (!elems) 6927 return; 6928 6929 if (rx_status->flag & RX_FLAG_DECRYPTED && 6930 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 6931 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 6932 sdata->vif.cfg.ap_addr); 6933 __ieee80211_disconnect(sdata); 6934 return; 6935 } 6936 6937 ncrc = elems->crc; 6938 6939 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 6940 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 6941 if (local->hw.conf.dynamic_ps_timeout > 0) { 6942 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 6943 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 6944 ieee80211_hw_config(local, 6945 IEEE80211_CONF_CHANGE_PS); 6946 } 6947 ieee80211_send_nullfunc(local, sdata, false); 6948 } else if (!local->pspolling && sdata->u.mgd.powersave) { 6949 local->pspolling = true; 6950 6951 /* 6952 * Here is assumed that the driver will be 6953 * able to send ps-poll frame and receive a 6954 * response even though power save mode is 6955 * enabled, but some drivers might require 6956 * to disable power save here. This needs 6957 * to be investigated. 6958 */ 6959 ieee80211_send_pspoll(local, sdata); 6960 } 6961 } 6962 6963 if (sdata->vif.p2p || 6964 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 6965 struct ieee80211_p2p_noa_attr noa = {}; 6966 int ret; 6967 6968 ret = cfg80211_get_p2p_attr(variable, 6969 len - baselen, 6970 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 6971 (u8 *) &noa, sizeof(noa)); 6972 if (ret >= 2) { 6973 if (link->u.mgd.p2p_noa_index != noa.index) { 6974 /* valid noa_attr and index changed */ 6975 link->u.mgd.p2p_noa_index = noa.index; 6976 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 6977 changed |= BSS_CHANGED_P2P_PS; 6978 /* 6979 * make sure we update all information, the CRC 6980 * mechanism doesn't look at P2P attributes. 6981 */ 6982 link->u.mgd.beacon_crc_valid = false; 6983 } 6984 } else if (link->u.mgd.p2p_noa_index != -1) { 6985 /* noa_attr not found and we had valid noa_attr before */ 6986 link->u.mgd.p2p_noa_index = -1; 6987 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 6988 changed |= BSS_CHANGED_P2P_PS; 6989 link->u.mgd.beacon_crc_valid = false; 6990 } 6991 } 6992 6993 /* 6994 * Update beacon timing and dtim count on every beacon appearance. This 6995 * will allow the driver to use the most updated values. Do it before 6996 * comparing this one with last received beacon. 6997 * IMPORTANT: These parameters would possibly be out of sync by the time 6998 * the driver will use them. The synchronized view is currently 6999 * guaranteed only in certain callbacks. 7000 */ 7001 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7002 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7003 bss_conf->sync_tsf = 7004 le64_to_cpu(mgmt->u.beacon.timestamp); 7005 bss_conf->sync_device_ts = 7006 rx_status->device_timestamp; 7007 bss_conf->sync_dtim_count = elems->dtim_count; 7008 } 7009 7010 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7011 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 7012 goto free; 7013 link->u.mgd.beacon_crc = ncrc; 7014 link->u.mgd.beacon_crc_valid = true; 7015 7016 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7017 7018 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7019 rx_status->device_timestamp, 7020 elems, elems, 7021 IEEE80211_CSA_SOURCE_BEACON); 7022 7023 /* note that after this elems->ml_basic can no longer be used fully */ 7024 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7025 7026 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7027 7028 if (!link->u.mgd.disable_wmm_tracking && 7029 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7030 elems->wmm_param_len, 7031 elems->mu_edca_param_set)) 7032 changed |= BSS_CHANGED_QOS; 7033 7034 /* 7035 * If we haven't had a beacon before, tell the driver about the 7036 * DTIM period (and beacon timing if desired) now. 7037 */ 7038 if (!link->u.mgd.have_beacon) { 7039 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7040 bss_conf->dtim_period = elems->dtim_period ?: 1; 7041 7042 changed |= BSS_CHANGED_BEACON_INFO; 7043 link->u.mgd.have_beacon = true; 7044 7045 ieee80211_recalc_ps(local); 7046 7047 ieee80211_recalc_ps_vif(sdata); 7048 } 7049 7050 if (elems->erp_info) { 7051 erp_valid = true; 7052 erp_value = elems->erp_info[0]; 7053 } else { 7054 erp_valid = false; 7055 } 7056 7057 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7058 changed |= ieee80211_handle_bss_capability(link, 7059 le16_to_cpu(mgmt->u.beacon.capab_info), 7060 erp_valid, erp_value); 7061 7062 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7063 if (WARN_ON(!sta)) { 7064 goto free; 7065 } 7066 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7067 lockdep_is_held(&local->hw.wiphy->mtx)); 7068 if (WARN_ON(!link_sta)) { 7069 goto free; 7070 } 7071 7072 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7073 goto free; 7074 7075 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7076 7077 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7078 7079 if (ieee80211_config_bw(link, elems, true, &changed)) { 7080 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7081 WLAN_REASON_DEAUTH_LEAVING, 7082 true, deauth_buf); 7083 ieee80211_report_disconnect(sdata, deauth_buf, 7084 sizeof(deauth_buf), true, 7085 WLAN_REASON_DEAUTH_LEAVING, 7086 false); 7087 goto free; 7088 } 7089 7090 if (elems->opmode_notif) 7091 ieee80211_vht_handle_opmode(sdata, link_sta, 7092 *elems->opmode_notif, 7093 rx_status->band); 7094 7095 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7096 elems->country_elem, 7097 elems->country_elem_len, 7098 elems->pwr_constr_elem, 7099 elems->cisco_dtpc_elem); 7100 7101 ieee80211_ml_reconfiguration(sdata, elems); 7102 ieee80211_process_adv_ttlm(sdata, elems, 7103 le64_to_cpu(mgmt->u.beacon.timestamp)); 7104 7105 ieee80211_link_info_change_notify(sdata, link, changed); 7106 free: 7107 kfree(elems); 7108 } 7109 7110 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7111 struct ieee80211_neg_ttlm neg_ttlm) 7112 { 7113 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7114 u8 i; 7115 7116 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7117 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7118 7119 /* If there is an active TTLM, unset previously suspended links */ 7120 if (sdata->vif.neg_ttlm.valid) 7121 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7122 7123 /* exclude links that are already disabled by advertised TTLM */ 7124 new_active_links = 7125 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7126 new_suspended_links = 7127 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7128 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7129 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7130 new_dormant_links, new_suspended_links)) 7131 return; 7132 7133 sdata->vif.neg_ttlm = neg_ttlm; 7134 sdata->vif.neg_ttlm.valid = true; 7135 } 7136 7137 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7138 struct wiphy_work *work) 7139 { 7140 struct ieee80211_sub_if_data *sdata = 7141 container_of(work, struct ieee80211_sub_if_data, 7142 u.mgd.neg_ttlm_timeout_work.work); 7143 7144 sdata_info(sdata, 7145 "No negotiated TTLM response from AP, disconnecting.\n"); 7146 7147 __ieee80211_disconnect(sdata); 7148 } 7149 7150 static void 7151 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7152 struct ieee80211_neg_ttlm *neg_ttlm) 7153 { 7154 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7155 7156 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7157 sizeof(neg_ttlm->downlink))) { 7158 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7159 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7160 } else { 7161 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7162 } 7163 7164 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7165 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7166 __le16 map; 7167 7168 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7169 7170 pos = skb_put(skb, len + 2); 7171 *pos++ = WLAN_EID_EXTENSION; 7172 len_pos = pos++; 7173 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7174 *pos++ = direction[i]; 7175 map_ind_pos = pos++; 7176 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7177 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7178 cpu_to_le16(neg_ttlm->uplink[tid]) : 7179 cpu_to_le16(neg_ttlm->downlink[tid]); 7180 if (!map) 7181 continue; 7182 7183 len += 2; 7184 map_ind |= BIT(tid); 7185 skb_put_data(skb, &map, sizeof(map)); 7186 } 7187 7188 *map_ind_pos = map_ind; 7189 *len_pos = len; 7190 7191 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7192 break; 7193 } 7194 } 7195 7196 static void 7197 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7198 struct ieee80211_neg_ttlm *neg_ttlm, 7199 u8 dialog_token) 7200 { 7201 struct ieee80211_local *local = sdata->local; 7202 struct ieee80211_mgmt *mgmt; 7203 struct sk_buff *skb; 7204 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7205 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7206 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7207 7208 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7209 if (!skb) 7210 return; 7211 7212 skb_reserve(skb, local->tx_headroom); 7213 mgmt = skb_put_zero(skb, hdr_len); 7214 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7215 IEEE80211_STYPE_ACTION); 7216 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7217 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7218 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7219 7220 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7221 mgmt->u.action.u.ttlm_req.action_code = 7222 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7223 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7224 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7225 ieee80211_tx_skb(sdata, skb); 7226 } 7227 7228 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7229 struct cfg80211_ttlm_params *params) 7230 { 7231 struct ieee80211_neg_ttlm neg_ttlm = {}; 7232 u8 i; 7233 7234 if (!ieee80211_vif_is_mld(&sdata->vif) || 7235 !(sdata->vif.cfg.mld_capa_op & 7236 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7237 return -EINVAL; 7238 7239 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7240 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7241 (params->ulink[i] & ~sdata->vif.valid_links)) 7242 return -EINVAL; 7243 7244 neg_ttlm.downlink[i] = params->dlink[i]; 7245 neg_ttlm.uplink[i] = params->ulink[i]; 7246 } 7247 7248 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7249 NEG_TTLM_RES_ACCEPT) 7250 return -EINVAL; 7251 7252 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7253 sdata->u.mgd.dialog_token_alloc++; 7254 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7255 sdata->u.mgd.dialog_token_alloc); 7256 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7257 &sdata->u.mgd.neg_ttlm_timeout_work); 7258 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7259 &sdata->u.mgd.neg_ttlm_timeout_work, 7260 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7261 return 0; 7262 } 7263 7264 static void 7265 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7266 enum ieee80211_neg_ttlm_res ttlm_res, 7267 u8 dialog_token, 7268 struct ieee80211_neg_ttlm *neg_ttlm) 7269 { 7270 struct ieee80211_local *local = sdata->local; 7271 struct ieee80211_mgmt *mgmt; 7272 struct sk_buff *skb; 7273 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7274 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7275 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7276 7277 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7278 if (!skb) 7279 return; 7280 7281 skb_reserve(skb, local->tx_headroom); 7282 mgmt = skb_put_zero(skb, hdr_len); 7283 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7284 IEEE80211_STYPE_ACTION); 7285 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7286 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7287 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7288 7289 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7290 mgmt->u.action.u.ttlm_res.action_code = 7291 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7292 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7293 switch (ttlm_res) { 7294 default: 7295 WARN_ON(1); 7296 fallthrough; 7297 case NEG_TTLM_RES_REJECT: 7298 mgmt->u.action.u.ttlm_res.status_code = 7299 WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7300 break; 7301 case NEG_TTLM_RES_ACCEPT: 7302 mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS; 7303 break; 7304 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7305 mgmt->u.action.u.ttlm_res.status_code = 7306 WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7307 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7308 break; 7309 } 7310 7311 ieee80211_tx_skb(sdata, skb); 7312 } 7313 7314 static int 7315 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7316 const struct ieee80211_ttlm_elem *ttlm, 7317 struct ieee80211_neg_ttlm *neg_ttlm, 7318 u8 *direction) 7319 { 7320 u8 control, link_map_presence, map_size, tid; 7321 u8 *pos; 7322 7323 /* The element size was already validated in 7324 * ieee80211_tid_to_link_map_size_ok() 7325 */ 7326 pos = (void *)ttlm->optional; 7327 7328 control = ttlm->control; 7329 7330 /* mapping switch time and expected duration fields are not expected 7331 * in case of negotiated TTLM 7332 */ 7333 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7334 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7335 mlme_dbg(sdata, 7336 "Invalid TTLM element in negotiated TTLM request\n"); 7337 return -EINVAL; 7338 } 7339 7340 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7341 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7342 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7343 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7344 } 7345 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7346 return 0; 7347 } 7348 7349 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7350 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7351 *direction != IEEE80211_TTLM_DIRECTION_UP && 7352 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7353 return -EINVAL; 7354 7355 link_map_presence = *pos; 7356 pos++; 7357 7358 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7359 map_size = 1; 7360 else 7361 map_size = 2; 7362 7363 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7364 u16 map; 7365 7366 if (link_map_presence & BIT(tid)) { 7367 map = ieee80211_get_ttlm(map_size, pos); 7368 if (!map) { 7369 mlme_dbg(sdata, 7370 "No active links for TID %d", tid); 7371 return -EINVAL; 7372 } 7373 } else { 7374 map = 0; 7375 } 7376 7377 switch (*direction) { 7378 case IEEE80211_TTLM_DIRECTION_BOTH: 7379 neg_ttlm->downlink[tid] = map; 7380 neg_ttlm->uplink[tid] = map; 7381 break; 7382 case IEEE80211_TTLM_DIRECTION_DOWN: 7383 neg_ttlm->downlink[tid] = map; 7384 break; 7385 case IEEE80211_TTLM_DIRECTION_UP: 7386 neg_ttlm->uplink[tid] = map; 7387 break; 7388 default: 7389 return -EINVAL; 7390 } 7391 pos += map_size; 7392 } 7393 return 0; 7394 } 7395 7396 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7397 struct ieee80211_mgmt *mgmt, size_t len) 7398 { 7399 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7400 size_t ies_len; 7401 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7402 struct ieee802_11_elems *elems = NULL; 7403 struct ieee80211_neg_ttlm neg_ttlm = {}; 7404 7405 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7406 7407 if (!ieee80211_vif_is_mld(&sdata->vif)) 7408 return; 7409 7410 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7411 ies_len = len - offsetof(struct ieee80211_mgmt, 7412 u.action.u.ttlm_req.variable); 7413 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7414 ies_len, true, NULL); 7415 if (!elems) { 7416 ttlm_res = NEG_TTLM_RES_REJECT; 7417 goto out; 7418 } 7419 7420 for (i = 0; i < elems->ttlm_num; i++) { 7421 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7422 &neg_ttlm, &direction[i]) || 7423 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7424 elems->ttlm_num != 1)) { 7425 ttlm_res = NEG_TTLM_RES_REJECT; 7426 goto out; 7427 } 7428 } 7429 7430 if (!elems->ttlm_num || 7431 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7432 ttlm_res = NEG_TTLM_RES_REJECT; 7433 goto out; 7434 } 7435 7436 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7437 if ((neg_ttlm.downlink[i] && 7438 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7439 (neg_ttlm.uplink[i] && 7440 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7441 ttlm_res = NEG_TTLM_RES_REJECT; 7442 goto out; 7443 } 7444 } 7445 7446 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7447 7448 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 7449 goto out; 7450 7451 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7452 out: 7453 kfree(elems); 7454 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 7455 } 7456 7457 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7458 struct ieee80211_mgmt *mgmt, size_t len) 7459 { 7460 if (!ieee80211_vif_is_mld(&sdata->vif) || 7461 mgmt->u.action.u.ttlm_req.dialog_token != 7462 sdata->u.mgd.dialog_token_alloc) 7463 return; 7464 7465 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7466 &sdata->u.mgd.neg_ttlm_timeout_work); 7467 7468 /* MLD station sends a TID to link mapping request, mainly to handle 7469 * BTM (BSS transition management) request, in which case it needs to 7470 * restrict the active links set. 7471 * In this case it's not expected that the MLD AP will reject the 7472 * negotiated TTLM request. 7473 * This can be better implemented in the future, to handle request 7474 * rejections. 7475 */ 7476 if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS) 7477 __ieee80211_disconnect(sdata); 7478 } 7479 7480 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 7481 struct wiphy_work *work) 7482 { 7483 u16 new_dormant_links; 7484 struct ieee80211_sub_if_data *sdata = 7485 container_of(work, struct ieee80211_sub_if_data, 7486 u.mgd.teardown_ttlm_work); 7487 7488 if (!sdata->vif.neg_ttlm.valid) 7489 return; 7490 7491 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7492 new_dormant_links = 7493 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7494 sdata->vif.suspended_links = 0; 7495 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7496 new_dormant_links); 7497 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 7498 BSS_CHANGED_MLD_VALID_LINKS); 7499 } 7500 7501 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 7502 { 7503 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7504 struct ieee80211_local *local = sdata->local; 7505 struct ieee80211_mgmt *mgmt; 7506 struct sk_buff *skb; 7507 int frame_len = offsetofend(struct ieee80211_mgmt, 7508 u.action.u.ttlm_tear_down); 7509 struct ieee80211_tx_info *info; 7510 7511 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 7512 if (!skb) 7513 return; 7514 7515 skb_reserve(skb, local->hw.extra_tx_headroom); 7516 mgmt = skb_put_zero(skb, frame_len); 7517 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7518 IEEE80211_STYPE_ACTION); 7519 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7520 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7521 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7522 7523 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7524 mgmt->u.action.u.ttlm_tear_down.action_code = 7525 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 7526 7527 info = IEEE80211_SKB_CB(skb); 7528 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 7529 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 7530 ieee80211_tx_skb(sdata, skb); 7531 } 7532 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 7533 7534 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 7535 struct sk_buff *skb) 7536 { 7537 struct ieee80211_link_data *link = &sdata->deflink; 7538 struct ieee80211_rx_status *rx_status; 7539 struct ieee80211_hdr *hdr; 7540 u16 fc; 7541 7542 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7543 7544 rx_status = (struct ieee80211_rx_status *) skb->cb; 7545 hdr = (struct ieee80211_hdr *) skb->data; 7546 fc = le16_to_cpu(hdr->frame_control); 7547 7548 switch (fc & IEEE80211_FCTL_STYPE) { 7549 case IEEE80211_STYPE_S1G_BEACON: 7550 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 7551 break; 7552 } 7553 } 7554 7555 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 7556 struct sk_buff *skb) 7557 { 7558 struct ieee80211_link_data *link = &sdata->deflink; 7559 struct ieee80211_rx_status *rx_status; 7560 struct ieee802_11_elems *elems; 7561 struct ieee80211_mgmt *mgmt; 7562 u16 fc; 7563 int ies_len; 7564 7565 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7566 7567 rx_status = (struct ieee80211_rx_status *) skb->cb; 7568 mgmt = (struct ieee80211_mgmt *) skb->data; 7569 fc = le16_to_cpu(mgmt->frame_control); 7570 7571 if (rx_status->link_valid) { 7572 link = sdata_dereference(sdata->link[rx_status->link_id], 7573 sdata); 7574 if (!link) 7575 return; 7576 } 7577 7578 switch (fc & IEEE80211_FCTL_STYPE) { 7579 case IEEE80211_STYPE_BEACON: 7580 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 7581 skb->len, rx_status); 7582 break; 7583 case IEEE80211_STYPE_PROBE_RESP: 7584 ieee80211_rx_mgmt_probe_resp(link, skb); 7585 break; 7586 case IEEE80211_STYPE_AUTH: 7587 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 7588 break; 7589 case IEEE80211_STYPE_DEAUTH: 7590 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 7591 break; 7592 case IEEE80211_STYPE_DISASSOC: 7593 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 7594 break; 7595 case IEEE80211_STYPE_ASSOC_RESP: 7596 case IEEE80211_STYPE_REASSOC_RESP: 7597 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 7598 break; 7599 case IEEE80211_STYPE_ACTION: 7600 if (!sdata->u.mgd.associated || 7601 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 7602 break; 7603 7604 switch (mgmt->u.action.category) { 7605 case WLAN_CATEGORY_SPECTRUM_MGMT: 7606 ies_len = skb->len - 7607 offsetof(struct ieee80211_mgmt, 7608 u.action.u.chan_switch.variable); 7609 7610 if (ies_len < 0) 7611 break; 7612 7613 /* CSA IE cannot be overridden, no need for BSSID */ 7614 elems = ieee802_11_parse_elems( 7615 mgmt->u.action.u.chan_switch.variable, 7616 ies_len, true, NULL); 7617 7618 if (elems && !elems->parse_error) { 7619 enum ieee80211_csa_source src = 7620 IEEE80211_CSA_SOURCE_PROT_ACTION; 7621 7622 ieee80211_sta_process_chanswitch(link, 7623 rx_status->mactime, 7624 rx_status->device_timestamp, 7625 elems, elems, 7626 src); 7627 } 7628 kfree(elems); 7629 break; 7630 case WLAN_CATEGORY_PUBLIC: 7631 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 7632 ies_len = skb->len - 7633 offsetof(struct ieee80211_mgmt, 7634 u.action.u.ext_chan_switch.variable); 7635 7636 if (ies_len < 0) 7637 break; 7638 7639 /* 7640 * extended CSA IE can't be overridden, no need for 7641 * BSSID 7642 */ 7643 elems = ieee802_11_parse_elems( 7644 mgmt->u.action.u.ext_chan_switch.variable, 7645 ies_len, true, NULL); 7646 7647 if (elems && !elems->parse_error) { 7648 enum ieee80211_csa_source src; 7649 7650 if (mgmt->u.action.category == 7651 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 7652 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 7653 else 7654 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 7655 7656 /* for the handling code pretend it was an IE */ 7657 elems->ext_chansw_ie = 7658 &mgmt->u.action.u.ext_chan_switch.data; 7659 7660 ieee80211_sta_process_chanswitch(link, 7661 rx_status->mactime, 7662 rx_status->device_timestamp, 7663 elems, elems, 7664 src); 7665 } 7666 7667 kfree(elems); 7668 break; 7669 } 7670 break; 7671 } 7672 } 7673 7674 static void ieee80211_sta_timer(struct timer_list *t) 7675 { 7676 struct ieee80211_sub_if_data *sdata = 7677 from_timer(sdata, t, u.mgd.timer); 7678 7679 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 7680 } 7681 7682 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 7683 u8 reason, bool tx) 7684 { 7685 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7686 7687 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 7688 tx, frame_buf); 7689 7690 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7691 reason, false); 7692 } 7693 7694 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 7695 { 7696 struct ieee80211_local *local = sdata->local; 7697 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7698 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 7699 u32 tx_flags = 0; 7700 u16 trans = 1; 7701 u16 status = 0; 7702 struct ieee80211_prep_tx_info info = { 7703 .subtype = IEEE80211_STYPE_AUTH, 7704 }; 7705 7706 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7707 7708 if (WARN_ON_ONCE(!auth_data)) 7709 return -EINVAL; 7710 7711 auth_data->tries++; 7712 7713 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 7714 sdata_info(sdata, "authentication with %pM timed out\n", 7715 auth_data->ap_addr); 7716 7717 /* 7718 * Most likely AP is not in the range so remove the 7719 * bss struct for that AP. 7720 */ 7721 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 7722 7723 return -ETIMEDOUT; 7724 } 7725 7726 if (auth_data->algorithm == WLAN_AUTH_SAE) 7727 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 7728 7729 info.link_id = auth_data->link_id; 7730 drv_mgd_prepare_tx(local, sdata, &info); 7731 7732 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 7733 auth_data->ap_addr, auth_data->tries, 7734 IEEE80211_AUTH_MAX_TRIES); 7735 7736 auth_data->expected_transaction = 2; 7737 7738 if (auth_data->algorithm == WLAN_AUTH_SAE) { 7739 trans = auth_data->sae_trans; 7740 status = auth_data->sae_status; 7741 auth_data->expected_transaction = trans; 7742 } 7743 7744 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7745 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 7746 IEEE80211_TX_INTFL_MLME_CONN_TX; 7747 7748 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 7749 auth_data->data, auth_data->data_len, 7750 auth_data->ap_addr, auth_data->ap_addr, 7751 NULL, 0, 0, tx_flags); 7752 7753 if (tx_flags == 0) { 7754 if (auth_data->algorithm == WLAN_AUTH_SAE) 7755 auth_data->timeout = jiffies + 7756 IEEE80211_AUTH_TIMEOUT_SAE; 7757 else 7758 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 7759 } else { 7760 auth_data->timeout = 7761 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 7762 } 7763 7764 auth_data->timeout_started = true; 7765 run_again(sdata, auth_data->timeout); 7766 7767 return 0; 7768 } 7769 7770 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 7771 { 7772 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 7773 struct ieee80211_local *local = sdata->local; 7774 int ret; 7775 7776 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7777 7778 assoc_data->tries++; 7779 assoc_data->comeback = false; 7780 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 7781 sdata_info(sdata, "association with %pM timed out\n", 7782 assoc_data->ap_addr); 7783 7784 /* 7785 * Most likely AP is not in the range so remove the 7786 * bss struct for that AP. 7787 */ 7788 cfg80211_unlink_bss(local->hw.wiphy, 7789 assoc_data->link[assoc_data->assoc_link_id].bss); 7790 7791 return -ETIMEDOUT; 7792 } 7793 7794 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 7795 assoc_data->ap_addr, assoc_data->tries, 7796 IEEE80211_ASSOC_MAX_TRIES); 7797 ret = ieee80211_send_assoc(sdata); 7798 if (ret) 7799 return ret; 7800 7801 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7802 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 7803 assoc_data->timeout_started = true; 7804 run_again(sdata, assoc_data->timeout); 7805 } else { 7806 assoc_data->timeout = 7807 round_jiffies_up(jiffies + 7808 IEEE80211_ASSOC_TIMEOUT_LONG); 7809 assoc_data->timeout_started = true; 7810 run_again(sdata, assoc_data->timeout); 7811 } 7812 7813 return 0; 7814 } 7815 7816 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 7817 __le16 fc, bool acked) 7818 { 7819 struct ieee80211_local *local = sdata->local; 7820 7821 sdata->u.mgd.status_fc = fc; 7822 sdata->u.mgd.status_acked = acked; 7823 sdata->u.mgd.status_received = true; 7824 7825 wiphy_work_queue(local->hw.wiphy, &sdata->work); 7826 } 7827 7828 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 7829 { 7830 struct ieee80211_local *local = sdata->local; 7831 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7832 7833 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7834 7835 if (ifmgd->status_received) { 7836 __le16 fc = ifmgd->status_fc; 7837 bool status_acked = ifmgd->status_acked; 7838 7839 ifmgd->status_received = false; 7840 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 7841 if (status_acked) { 7842 if (ifmgd->auth_data->algorithm == 7843 WLAN_AUTH_SAE) 7844 ifmgd->auth_data->timeout = 7845 jiffies + 7846 IEEE80211_AUTH_TIMEOUT_SAE; 7847 else 7848 ifmgd->auth_data->timeout = 7849 jiffies + 7850 IEEE80211_AUTH_TIMEOUT_SHORT; 7851 run_again(sdata, ifmgd->auth_data->timeout); 7852 } else { 7853 ifmgd->auth_data->timeout = jiffies - 1; 7854 } 7855 ifmgd->auth_data->timeout_started = true; 7856 } else if (ifmgd->assoc_data && 7857 !ifmgd->assoc_data->comeback && 7858 (ieee80211_is_assoc_req(fc) || 7859 ieee80211_is_reassoc_req(fc))) { 7860 /* 7861 * Update association timeout based on the TX status 7862 * for the (Re)Association Request frame. Skip this if 7863 * we have already processed a (Re)Association Response 7864 * frame that indicated need for association comeback 7865 * at a specific time in the future. This could happen 7866 * if the TX status information is delayed enough for 7867 * the response to be received and processed first. 7868 */ 7869 if (status_acked) { 7870 ifmgd->assoc_data->timeout = 7871 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 7872 run_again(sdata, ifmgd->assoc_data->timeout); 7873 } else { 7874 ifmgd->assoc_data->timeout = jiffies - 1; 7875 } 7876 ifmgd->assoc_data->timeout_started = true; 7877 } 7878 } 7879 7880 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 7881 time_after(jiffies, ifmgd->auth_data->timeout)) { 7882 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 7883 /* 7884 * ok ... we waited for assoc or continuation but 7885 * userspace didn't do it, so kill the auth data 7886 */ 7887 ieee80211_destroy_auth_data(sdata, false); 7888 } else if (ieee80211_auth(sdata)) { 7889 u8 ap_addr[ETH_ALEN]; 7890 struct ieee80211_event event = { 7891 .type = MLME_EVENT, 7892 .u.mlme.data = AUTH_EVENT, 7893 .u.mlme.status = MLME_TIMEOUT, 7894 }; 7895 7896 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 7897 7898 ieee80211_destroy_auth_data(sdata, false); 7899 7900 cfg80211_auth_timeout(sdata->dev, ap_addr); 7901 drv_event_callback(sdata->local, sdata, &event); 7902 } 7903 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 7904 run_again(sdata, ifmgd->auth_data->timeout); 7905 7906 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 7907 time_after(jiffies, ifmgd->assoc_data->timeout)) { 7908 if ((ifmgd->assoc_data->need_beacon && 7909 !sdata->deflink.u.mgd.have_beacon) || 7910 ieee80211_do_assoc(sdata)) { 7911 struct ieee80211_event event = { 7912 .type = MLME_EVENT, 7913 .u.mlme.data = ASSOC_EVENT, 7914 .u.mlme.status = MLME_TIMEOUT, 7915 }; 7916 7917 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7918 drv_event_callback(sdata->local, sdata, &event); 7919 } 7920 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 7921 run_again(sdata, ifmgd->assoc_data->timeout); 7922 7923 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 7924 ifmgd->associated) { 7925 u8 *bssid = sdata->deflink.u.mgd.bssid; 7926 int max_tries; 7927 7928 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7929 max_tries = max_nullfunc_tries; 7930 else 7931 max_tries = max_probe_tries; 7932 7933 /* ACK received for nullfunc probing frame */ 7934 if (!ifmgd->probe_send_count) 7935 ieee80211_reset_ap_probe(sdata); 7936 else if (ifmgd->nullfunc_failed) { 7937 if (ifmgd->probe_send_count < max_tries) { 7938 mlme_dbg(sdata, 7939 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 7940 bssid, ifmgd->probe_send_count, 7941 max_tries); 7942 ieee80211_mgd_probe_ap_send(sdata); 7943 } else { 7944 mlme_dbg(sdata, 7945 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 7946 bssid); 7947 ieee80211_sta_connection_lost(sdata, 7948 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 7949 false); 7950 } 7951 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 7952 run_again(sdata, ifmgd->probe_timeout); 7953 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7954 mlme_dbg(sdata, 7955 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 7956 bssid, probe_wait_ms); 7957 ieee80211_sta_connection_lost(sdata, 7958 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7959 } else if (ifmgd->probe_send_count < max_tries) { 7960 mlme_dbg(sdata, 7961 "No probe response from AP %pM after %dms, try %d/%i\n", 7962 bssid, probe_wait_ms, 7963 ifmgd->probe_send_count, max_tries); 7964 ieee80211_mgd_probe_ap_send(sdata); 7965 } else { 7966 /* 7967 * We actually lost the connection ... or did we? 7968 * Let's make sure! 7969 */ 7970 mlme_dbg(sdata, 7971 "No probe response from AP %pM after %dms, disconnecting.\n", 7972 bssid, probe_wait_ms); 7973 7974 ieee80211_sta_connection_lost(sdata, 7975 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7976 } 7977 } 7978 } 7979 7980 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 7981 { 7982 struct ieee80211_sub_if_data *sdata = 7983 from_timer(sdata, t, u.mgd.bcn_mon_timer); 7984 7985 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7986 return; 7987 7988 if (sdata->vif.bss_conf.csa_active && 7989 !sdata->deflink.u.mgd.csa.waiting_bcn) 7990 return; 7991 7992 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 7993 return; 7994 7995 sdata->u.mgd.connection_loss = false; 7996 wiphy_work_queue(sdata->local->hw.wiphy, 7997 &sdata->u.mgd.beacon_connection_loss_work); 7998 } 7999 8000 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8001 { 8002 struct ieee80211_sub_if_data *sdata = 8003 from_timer(sdata, t, u.mgd.conn_mon_timer); 8004 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8005 struct ieee80211_local *local = sdata->local; 8006 struct sta_info *sta; 8007 unsigned long timeout; 8008 8009 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 8010 return; 8011 8012 if (sdata->vif.bss_conf.csa_active && 8013 !sdata->deflink.u.mgd.csa.waiting_bcn) 8014 return; 8015 8016 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8017 if (!sta) 8018 return; 8019 8020 timeout = sta->deflink.status_stats.last_ack; 8021 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 8022 timeout = sta->deflink.rx_stats.last_rx; 8023 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8024 8025 /* If timeout is after now, then update timer to fire at 8026 * the later date, but do not actually probe at this time. 8027 */ 8028 if (time_is_after_jiffies(timeout)) { 8029 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 8030 return; 8031 } 8032 8033 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8034 } 8035 8036 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8037 struct wiphy_work *work) 8038 { 8039 struct ieee80211_sub_if_data *sdata = 8040 container_of(work, struct ieee80211_sub_if_data, 8041 u.mgd.monitor_work); 8042 8043 ieee80211_mgd_probe_ap(sdata, false); 8044 } 8045 8046 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8047 { 8048 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8049 __ieee80211_stop_poll(sdata); 8050 8051 /* let's probe the connection once */ 8052 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8053 wiphy_work_queue(sdata->local->hw.wiphy, 8054 &sdata->u.mgd.monitor_work); 8055 } 8056 } 8057 8058 #ifdef CONFIG_PM 8059 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8060 { 8061 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8062 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8063 8064 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8065 8066 if (ifmgd->auth_data || ifmgd->assoc_data) { 8067 const u8 *ap_addr = ifmgd->auth_data ? 8068 ifmgd->auth_data->ap_addr : 8069 ifmgd->assoc_data->ap_addr; 8070 8071 /* 8072 * If we are trying to authenticate / associate while suspending, 8073 * cfg80211 won't know and won't actually abort those attempts, 8074 * thus we need to do that ourselves. 8075 */ 8076 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8077 IEEE80211_STYPE_DEAUTH, 8078 WLAN_REASON_DEAUTH_LEAVING, 8079 false, frame_buf); 8080 if (ifmgd->assoc_data) 8081 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8082 if (ifmgd->auth_data) 8083 ieee80211_destroy_auth_data(sdata, false); 8084 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8085 IEEE80211_DEAUTH_FRAME_LEN, 8086 false); 8087 } 8088 8089 /* This is a bit of a hack - we should find a better and more generic 8090 * solution to this. Normally when suspending, cfg80211 will in fact 8091 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8092 * auth (not so important) or assoc (this is the problem) process. 8093 * 8094 * As a consequence, it can happen that we are in the process of both 8095 * associating and suspending, and receive an association response 8096 * after cfg80211 has checked if it needs to disconnect, but before 8097 * we actually set the flag to drop incoming frames. This will then 8098 * cause the workqueue flush to process the association response in 8099 * the suspend, resulting in a successful association just before it 8100 * tries to remove the interface from the driver, which now though 8101 * has a channel context assigned ... this results in issues. 8102 * 8103 * To work around this (for now) simply deauth here again if we're 8104 * now connected. 8105 */ 8106 if (ifmgd->associated && !sdata->local->wowlan) { 8107 u8 bssid[ETH_ALEN]; 8108 struct cfg80211_deauth_request req = { 8109 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8110 .bssid = bssid, 8111 }; 8112 8113 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8114 ieee80211_mgd_deauth(sdata, &req); 8115 } 8116 } 8117 #endif 8118 8119 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8120 { 8121 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8122 8123 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8124 8125 if (!ifmgd->associated) 8126 return; 8127 8128 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8129 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8130 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8131 ieee80211_sta_connection_lost(sdata, 8132 WLAN_REASON_UNSPECIFIED, 8133 true); 8134 return; 8135 } 8136 8137 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8138 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8139 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8140 ieee80211_sta_connection_lost(sdata, 8141 WLAN_REASON_UNSPECIFIED, 8142 true); 8143 return; 8144 } 8145 } 8146 8147 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8148 struct wiphy_work *work) 8149 { 8150 struct ieee80211_link_data *link = 8151 container_of(work, struct ieee80211_link_data, 8152 u.mgd.request_smps_work); 8153 8154 __ieee80211_request_smps_mgd(link->sdata, link, 8155 link->u.mgd.driver_smps_mode); 8156 } 8157 8158 /* interface setup */ 8159 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8160 { 8161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8162 8163 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8164 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8165 ieee80211_beacon_connection_loss_work); 8166 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8167 ieee80211_csa_connection_drop_work); 8168 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8169 ieee80211_tdls_peer_del_work); 8170 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8171 ieee80211_ml_reconf_work); 8172 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8173 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8174 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8175 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8176 ieee80211_sta_handle_tspec_ac_params_wk); 8177 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8178 ieee80211_tid_to_link_map_work); 8179 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8180 ieee80211_neg_ttlm_timeout_work); 8181 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8182 ieee80211_teardown_ttlm_work); 8183 8184 ifmgd->flags = 0; 8185 ifmgd->powersave = sdata->wdev.ps; 8186 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8187 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8188 /* Setup TDLS data */ 8189 spin_lock_init(&ifmgd->teardown_lock); 8190 ifmgd->teardown_skb = NULL; 8191 ifmgd->orig_teardown_skb = NULL; 8192 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8193 } 8194 8195 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8196 struct wiphy_work *work) 8197 { 8198 struct ieee80211_link_data *link = 8199 container_of(work, struct ieee80211_link_data, 8200 u.mgd.recalc_smps); 8201 8202 ieee80211_recalc_smps(link->sdata, link); 8203 } 8204 8205 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8206 { 8207 struct ieee80211_sub_if_data *sdata = link->sdata; 8208 struct ieee80211_local *local = sdata->local; 8209 unsigned int link_id = link->link_id; 8210 8211 link->u.mgd.p2p_noa_index = -1; 8212 link->conf->bssid = link->u.mgd.bssid; 8213 link->smps_mode = IEEE80211_SMPS_OFF; 8214 8215 wiphy_work_init(&link->u.mgd.request_smps_work, 8216 ieee80211_request_smps_mgd_work); 8217 wiphy_work_init(&link->u.mgd.recalc_smps, 8218 ieee80211_recalc_smps_work); 8219 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8220 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8221 else 8222 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8223 8224 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8225 ieee80211_csa_switch_work); 8226 8227 ieee80211_clear_tpe(&link->conf->tpe); 8228 8229 if (sdata->u.mgd.assoc_data) 8230 ether_addr_copy(link->conf->addr, 8231 sdata->u.mgd.assoc_data->link[link_id].addr); 8232 else if (!is_valid_ether_addr(link->conf->addr)) 8233 eth_random_addr(link->conf->addr); 8234 } 8235 8236 /* scan finished notification */ 8237 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8238 { 8239 struct ieee80211_sub_if_data *sdata; 8240 8241 /* Restart STA timers */ 8242 rcu_read_lock(); 8243 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8244 if (ieee80211_sdata_running(sdata)) 8245 ieee80211_restart_sta_timer(sdata); 8246 } 8247 rcu_read_unlock(); 8248 } 8249 8250 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8251 struct cfg80211_bss *cbss, s8 link_id, 8252 const u8 *ap_mld_addr, bool assoc, 8253 struct ieee80211_conn_settings *conn, 8254 bool override) 8255 { 8256 struct ieee80211_local *local = sdata->local; 8257 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8258 struct ieee80211_bss *bss = (void *)cbss->priv; 8259 struct sta_info *new_sta = NULL; 8260 struct ieee80211_link_data *link; 8261 bool have_sta = false; 8262 bool mlo; 8263 int err; 8264 8265 if (link_id >= 0) { 8266 mlo = true; 8267 if (WARN_ON(!ap_mld_addr)) 8268 return -EINVAL; 8269 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 8270 } else { 8271 if (WARN_ON(ap_mld_addr)) 8272 return -EINVAL; 8273 ap_mld_addr = cbss->bssid; 8274 err = ieee80211_vif_set_links(sdata, 0, 0); 8275 link_id = 0; 8276 mlo = false; 8277 } 8278 8279 if (err) 8280 return err; 8281 8282 link = sdata_dereference(sdata->link[link_id], sdata); 8283 if (WARN_ON(!link)) { 8284 err = -ENOLINK; 8285 goto out_err; 8286 } 8287 8288 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8289 err = -EINVAL; 8290 goto out_err; 8291 } 8292 8293 /* If a reconfig is happening, bail out */ 8294 if (local->in_reconfig) { 8295 err = -EBUSY; 8296 goto out_err; 8297 } 8298 8299 if (assoc) { 8300 rcu_read_lock(); 8301 have_sta = sta_info_get(sdata, ap_mld_addr); 8302 rcu_read_unlock(); 8303 } 8304 8305 if (!have_sta) { 8306 if (mlo) 8307 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8308 link_id, cbss->bssid, 8309 GFP_KERNEL); 8310 else 8311 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8312 8313 if (!new_sta) { 8314 err = -ENOMEM; 8315 goto out_err; 8316 } 8317 8318 new_sta->sta.mlo = mlo; 8319 } 8320 8321 /* 8322 * Set up the information for the new channel before setting the 8323 * new channel. We can't - completely race-free - change the basic 8324 * rates bitmap and the channel (sband) that it refers to, but if 8325 * we set it up before we at least avoid calling into the driver's 8326 * bss_info_changed() method with invalid information (since we do 8327 * call that from changing the channel - only for IDLE and perhaps 8328 * some others, but ...). 8329 * 8330 * So to avoid that, just set up all the new information before the 8331 * channel, but tell the driver to apply it only afterwards, since 8332 * it might need the new channel for that. 8333 */ 8334 if (new_sta) { 8335 const struct cfg80211_bss_ies *ies; 8336 struct link_sta_info *link_sta; 8337 8338 rcu_read_lock(); 8339 link_sta = rcu_dereference(new_sta->link[link_id]); 8340 if (WARN_ON(!link_sta)) { 8341 rcu_read_unlock(); 8342 sta_info_free(local, new_sta); 8343 err = -EINVAL; 8344 goto out_err; 8345 } 8346 8347 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8348 link_sta, cbss); 8349 if (err) { 8350 rcu_read_unlock(); 8351 sta_info_free(local, new_sta); 8352 goto out_err; 8353 } 8354 8355 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8356 8357 /* set timing information */ 8358 link->conf->beacon_int = cbss->beacon_interval; 8359 ies = rcu_dereference(cbss->beacon_ies); 8360 if (ies) { 8361 link->conf->sync_tsf = ies->tsf; 8362 link->conf->sync_device_ts = 8363 bss->device_ts_beacon; 8364 8365 ieee80211_get_dtim(ies, 8366 &link->conf->sync_dtim_count, 8367 NULL); 8368 } else if (!ieee80211_hw_check(&sdata->local->hw, 8369 TIMING_BEACON_ONLY)) { 8370 ies = rcu_dereference(cbss->proberesp_ies); 8371 /* must be non-NULL since beacon IEs were NULL */ 8372 link->conf->sync_tsf = ies->tsf; 8373 link->conf->sync_device_ts = 8374 bss->device_ts_presp; 8375 link->conf->sync_dtim_count = 0; 8376 } else { 8377 link->conf->sync_tsf = 0; 8378 link->conf->sync_device_ts = 0; 8379 link->conf->sync_dtim_count = 0; 8380 } 8381 rcu_read_unlock(); 8382 } 8383 8384 if (new_sta || override) { 8385 /* 8386 * Only set this if we're also going to calculate the AP 8387 * settings etc., otherwise this was set before in a 8388 * previous call. Note override is set to %true in assoc 8389 * if the settings were changed. 8390 */ 8391 link->u.mgd.conn = *conn; 8392 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 8393 mlo, &link->u.mgd.conn); 8394 if (err) { 8395 if (new_sta) 8396 sta_info_free(local, new_sta); 8397 goto out_err; 8398 } 8399 /* pass out for use in assoc */ 8400 *conn = link->u.mgd.conn; 8401 } 8402 8403 if (new_sta) { 8404 /* 8405 * tell driver about BSSID, basic rates and timing 8406 * this was set up above, before setting the channel 8407 */ 8408 ieee80211_link_info_change_notify(sdata, link, 8409 BSS_CHANGED_BSSID | 8410 BSS_CHANGED_BASIC_RATES | 8411 BSS_CHANGED_BEACON_INT); 8412 8413 if (assoc) 8414 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 8415 8416 err = sta_info_insert(new_sta); 8417 new_sta = NULL; 8418 if (err) { 8419 sdata_info(sdata, 8420 "failed to insert STA entry for the AP (error %d)\n", 8421 err); 8422 goto out_release_chan; 8423 } 8424 } else 8425 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 8426 8427 /* Cancel scan to ensure that nothing interferes with connection */ 8428 if (local->scanning) 8429 ieee80211_scan_cancel(local); 8430 8431 return 0; 8432 8433 out_release_chan: 8434 ieee80211_link_release_channel(link); 8435 out_err: 8436 ieee80211_vif_set_links(sdata, 0, 0); 8437 return err; 8438 } 8439 8440 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 8441 const struct cfg80211_bss_ies *ies, 8442 u8 cur_channel, bool ignore_ecsa) 8443 { 8444 const struct element *csa_elem, *ecsa_elem; 8445 struct ieee80211_channel_sw_ie *csa = NULL; 8446 struct ieee80211_ext_chansw_ie *ecsa = NULL; 8447 8448 if (!ies) 8449 return false; 8450 8451 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 8452 ies->data, ies->len); 8453 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 8454 csa = (void *)csa_elem->data; 8455 8456 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 8457 ies->data, ies->len); 8458 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 8459 ecsa = (void *)ecsa_elem->data; 8460 8461 if (csa && csa->count == 0) 8462 csa = NULL; 8463 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 8464 csa = NULL; 8465 8466 if (ecsa && ecsa->count == 0) 8467 ecsa = NULL; 8468 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 8469 ecsa = NULL; 8470 8471 if (ignore_ecsa && ecsa) { 8472 sdata_info(sdata, 8473 "Ignoring ECSA in probe response - was considered stuck!\n"); 8474 return csa; 8475 } 8476 8477 return csa || ecsa; 8478 } 8479 8480 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 8481 struct cfg80211_bss *bss) 8482 { 8483 u8 cur_channel; 8484 bool ret; 8485 8486 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 8487 8488 rcu_read_lock(); 8489 if (ieee80211_mgd_csa_present(sdata, 8490 rcu_dereference(bss->beacon_ies), 8491 cur_channel, false)) { 8492 ret = true; 8493 goto out; 8494 } 8495 8496 if (ieee80211_mgd_csa_present(sdata, 8497 rcu_dereference(bss->proberesp_ies), 8498 cur_channel, bss->proberesp_ecsa_stuck)) { 8499 ret = true; 8500 goto out; 8501 } 8502 8503 ret = false; 8504 out: 8505 rcu_read_unlock(); 8506 return ret; 8507 } 8508 8509 /* config hooks */ 8510 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 8511 struct cfg80211_auth_request *req) 8512 { 8513 struct ieee80211_local *local = sdata->local; 8514 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8515 struct ieee80211_mgd_auth_data *auth_data; 8516 struct ieee80211_conn_settings conn; 8517 struct ieee80211_link_data *link; 8518 struct ieee80211_supported_band *sband; 8519 struct ieee80211_bss *bss; 8520 u16 auth_alg; 8521 int err; 8522 bool cont_auth, wmm_used; 8523 8524 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8525 8526 /* prepare auth data structure */ 8527 8528 switch (req->auth_type) { 8529 case NL80211_AUTHTYPE_OPEN_SYSTEM: 8530 auth_alg = WLAN_AUTH_OPEN; 8531 break; 8532 case NL80211_AUTHTYPE_SHARED_KEY: 8533 if (fips_enabled) 8534 return -EOPNOTSUPP; 8535 auth_alg = WLAN_AUTH_SHARED_KEY; 8536 break; 8537 case NL80211_AUTHTYPE_FT: 8538 auth_alg = WLAN_AUTH_FT; 8539 break; 8540 case NL80211_AUTHTYPE_NETWORK_EAP: 8541 auth_alg = WLAN_AUTH_LEAP; 8542 break; 8543 case NL80211_AUTHTYPE_SAE: 8544 auth_alg = WLAN_AUTH_SAE; 8545 break; 8546 case NL80211_AUTHTYPE_FILS_SK: 8547 auth_alg = WLAN_AUTH_FILS_SK; 8548 break; 8549 case NL80211_AUTHTYPE_FILS_SK_PFS: 8550 auth_alg = WLAN_AUTH_FILS_SK_PFS; 8551 break; 8552 case NL80211_AUTHTYPE_FILS_PK: 8553 auth_alg = WLAN_AUTH_FILS_PK; 8554 break; 8555 default: 8556 return -EOPNOTSUPP; 8557 } 8558 8559 if (ifmgd->assoc_data) 8560 return -EBUSY; 8561 8562 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 8563 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 8564 return -EINVAL; 8565 } 8566 8567 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 8568 req->ie_len, GFP_KERNEL); 8569 if (!auth_data) 8570 return -ENOMEM; 8571 8572 memcpy(auth_data->ap_addr, 8573 req->ap_mld_addr ?: req->bss->bssid, 8574 ETH_ALEN); 8575 auth_data->bss = req->bss; 8576 auth_data->link_id = req->link_id; 8577 8578 if (req->auth_data_len >= 4) { 8579 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 8580 __le16 *pos = (__le16 *) req->auth_data; 8581 8582 auth_data->sae_trans = le16_to_cpu(pos[0]); 8583 auth_data->sae_status = le16_to_cpu(pos[1]); 8584 } 8585 memcpy(auth_data->data, req->auth_data + 4, 8586 req->auth_data_len - 4); 8587 auth_data->data_len += req->auth_data_len - 4; 8588 } 8589 8590 /* Check if continuing authentication or trying to authenticate with the 8591 * same BSS that we were in the process of authenticating with and avoid 8592 * removal and re-addition of the STA entry in 8593 * ieee80211_prep_connection(). 8594 */ 8595 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 8596 ifmgd->auth_data->link_id == req->link_id; 8597 8598 if (req->ie && req->ie_len) { 8599 memcpy(&auth_data->data[auth_data->data_len], 8600 req->ie, req->ie_len); 8601 auth_data->data_len += req->ie_len; 8602 } 8603 8604 if (req->key && req->key_len) { 8605 auth_data->key_len = req->key_len; 8606 auth_data->key_idx = req->key_idx; 8607 memcpy(auth_data->key, req->key, req->key_len); 8608 } 8609 8610 auth_data->algorithm = auth_alg; 8611 8612 /* try to authenticate/probe */ 8613 8614 if (ifmgd->auth_data) { 8615 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 8616 auth_data->peer_confirmed = 8617 ifmgd->auth_data->peer_confirmed; 8618 } 8619 ieee80211_destroy_auth_data(sdata, cont_auth); 8620 } 8621 8622 /* prep auth_data so we don't go into idle on disassoc */ 8623 ifmgd->auth_data = auth_data; 8624 8625 /* If this is continuation of an ongoing SAE authentication exchange 8626 * (i.e., request to send SAE Confirm) and the peer has already 8627 * confirmed, mark authentication completed since we are about to send 8628 * out SAE Confirm. 8629 */ 8630 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 8631 auth_data->peer_confirmed && auth_data->sae_trans == 2) 8632 ieee80211_mark_sta_auth(sdata); 8633 8634 if (ifmgd->associated) { 8635 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8636 8637 sdata_info(sdata, 8638 "disconnect from AP %pM for new auth to %pM\n", 8639 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 8640 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8641 WLAN_REASON_UNSPECIFIED, 8642 false, frame_buf); 8643 8644 ieee80211_report_disconnect(sdata, frame_buf, 8645 sizeof(frame_buf), true, 8646 WLAN_REASON_UNSPECIFIED, 8647 false); 8648 } 8649 8650 /* needed for transmitting the auth frame(s) properly */ 8651 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 8652 8653 bss = (void *)req->bss->priv; 8654 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 8655 8656 sband = local->hw.wiphy->bands[req->bss->channel->band]; 8657 8658 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 8659 &conn); 8660 8661 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 8662 req->ap_mld_addr, cont_auth, 8663 &conn, false); 8664 if (err) 8665 goto err_clear; 8666 8667 if (req->link_id >= 0) 8668 link = sdata_dereference(sdata->link[req->link_id], sdata); 8669 else 8670 link = &sdata->deflink; 8671 8672 if (WARN_ON(!link)) { 8673 err = -ENOLINK; 8674 goto err_clear; 8675 } 8676 8677 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 8678 auth_data->ap_addr, link->conf->addr); 8679 8680 err = ieee80211_auth(sdata); 8681 if (err) { 8682 sta_info_destroy_addr(sdata, auth_data->ap_addr); 8683 goto err_clear; 8684 } 8685 8686 /* hold our own reference */ 8687 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 8688 return 0; 8689 8690 err_clear: 8691 if (!ieee80211_vif_is_mld(&sdata->vif)) { 8692 eth_zero_addr(sdata->deflink.u.mgd.bssid); 8693 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 8694 BSS_CHANGED_BSSID); 8695 ieee80211_link_release_channel(&sdata->deflink); 8696 } 8697 ifmgd->auth_data = NULL; 8698 kfree(auth_data); 8699 return err; 8700 } 8701 8702 static void 8703 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 8704 struct ieee80211_mgd_assoc_data *assoc_data, 8705 struct cfg80211_assoc_request *req, 8706 struct ieee80211_conn_settings *conn, 8707 unsigned int link_id) 8708 { 8709 struct ieee80211_local *local = sdata->local; 8710 const struct cfg80211_bss_ies *bss_ies; 8711 struct ieee80211_supported_band *sband; 8712 struct ieee80211_link_data *link; 8713 struct cfg80211_bss *cbss; 8714 struct ieee80211_bss *bss; 8715 8716 cbss = assoc_data->link[link_id].bss; 8717 if (WARN_ON(!cbss)) 8718 return; 8719 8720 bss = (void *)cbss->priv; 8721 8722 sband = local->hw.wiphy->bands[cbss->channel->band]; 8723 if (WARN_ON(!sband)) 8724 return; 8725 8726 link = sdata_dereference(sdata->link[link_id], sdata); 8727 if (WARN_ON(!link)) 8728 return; 8729 8730 /* for MLO connections assume advertising all rates is OK */ 8731 if (!req->ap_mld_addr) { 8732 assoc_data->supp_rates = bss->supp_rates; 8733 assoc_data->supp_rates_len = bss->supp_rates_len; 8734 } 8735 8736 /* copy and link elems for the STA profile */ 8737 if (req->links[link_id].elems_len) { 8738 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 8739 req->links[link_id].elems_len); 8740 assoc_data->link[link_id].elems = assoc_data->ie_pos; 8741 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 8742 assoc_data->ie_pos += req->links[link_id].elems_len; 8743 } 8744 8745 link->u.mgd.beacon_crc_valid = false; 8746 link->u.mgd.dtim_period = 0; 8747 link->u.mgd.have_beacon = false; 8748 8749 /* override HT configuration only if the AP and we support it */ 8750 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 8751 struct ieee80211_sta_ht_cap sta_ht_cap; 8752 8753 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 8754 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 8755 } 8756 8757 rcu_read_lock(); 8758 bss_ies = rcu_dereference(cbss->beacon_ies); 8759 if (bss_ies) { 8760 u8 dtim_count = 0; 8761 8762 ieee80211_get_dtim(bss_ies, &dtim_count, 8763 &link->u.mgd.dtim_period); 8764 8765 sdata->deflink.u.mgd.have_beacon = true; 8766 8767 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 8768 link->conf->sync_tsf = bss_ies->tsf; 8769 link->conf->sync_device_ts = bss->device_ts_beacon; 8770 link->conf->sync_dtim_count = dtim_count; 8771 } 8772 } else { 8773 bss_ies = rcu_dereference(cbss->ies); 8774 } 8775 8776 if (bss_ies) { 8777 const struct element *elem; 8778 8779 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 8780 bss_ies->data, bss_ies->len); 8781 if (elem && elem->datalen >= 3) 8782 link->conf->profile_periodicity = elem->data[2]; 8783 else 8784 link->conf->profile_periodicity = 0; 8785 8786 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 8787 bss_ies->data, bss_ies->len); 8788 if (elem && elem->datalen >= 11 && 8789 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 8790 link->conf->ema_ap = true; 8791 else 8792 link->conf->ema_ap = false; 8793 } 8794 rcu_read_unlock(); 8795 8796 if (bss->corrupt_data) { 8797 char *corrupt_type = "data"; 8798 8799 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 8800 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 8801 corrupt_type = "beacon and probe response"; 8802 else 8803 corrupt_type = "beacon"; 8804 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 8805 corrupt_type = "probe response"; 8806 } 8807 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 8808 cbss->bssid, corrupt_type); 8809 } 8810 8811 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 8812 if (sdata->u.mgd.powersave) 8813 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 8814 else 8815 link->smps_mode = IEEE80211_SMPS_OFF; 8816 } else { 8817 link->smps_mode = link->u.mgd.req_smps; 8818 } 8819 } 8820 8821 static int 8822 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 8823 struct ieee80211_mgd_assoc_data *assoc_data, 8824 int link_id) 8825 { 8826 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 8827 enum nl80211_band band = cbss->channel->band; 8828 struct ieee80211_supported_band *sband; 8829 const struct element *elem; 8830 int err; 8831 8832 /* neither HT nor VHT elements used on 6 GHz */ 8833 if (band == NL80211_BAND_6GHZ) 8834 return 0; 8835 8836 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 8837 return 0; 8838 8839 rcu_read_lock(); 8840 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 8841 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 8842 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 8843 cbss->bssid); 8844 err = -EINVAL; 8845 goto out_rcu; 8846 } 8847 assoc_data->link[link_id].ap_ht_param = 8848 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 8849 rcu_read_unlock(); 8850 8851 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 8852 return 0; 8853 8854 /* some drivers want to support VHT on 2.4 GHz even */ 8855 sband = sdata->local->hw.wiphy->bands[band]; 8856 if (!sband->vht_cap.vht_supported) 8857 return 0; 8858 8859 rcu_read_lock(); 8860 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 8861 /* but even then accept it not being present on the AP */ 8862 if (!elem && band == NL80211_BAND_2GHZ) { 8863 err = 0; 8864 goto out_rcu; 8865 } 8866 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 8867 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 8868 cbss->bssid); 8869 err = -EINVAL; 8870 goto out_rcu; 8871 } 8872 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 8873 sizeof(struct ieee80211_vht_cap)); 8874 rcu_read_unlock(); 8875 8876 return 0; 8877 out_rcu: 8878 rcu_read_unlock(); 8879 return err; 8880 } 8881 8882 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 8883 struct cfg80211_assoc_request *req) 8884 { 8885 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 8886 struct ieee80211_local *local = sdata->local; 8887 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8888 struct ieee80211_mgd_assoc_data *assoc_data; 8889 const struct element *ssid_elem; 8890 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 8891 struct ieee80211_link_data *link; 8892 struct cfg80211_bss *cbss; 8893 bool override, uapsd_supported; 8894 bool match_auth; 8895 int i, err; 8896 size_t size = sizeof(*assoc_data) + req->ie_len; 8897 8898 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 8899 size += req->links[i].elems_len; 8900 8901 /* FIXME: no support for 4-addr MLO yet */ 8902 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 8903 return -EOPNOTSUPP; 8904 8905 assoc_data = kzalloc(size, GFP_KERNEL); 8906 if (!assoc_data) 8907 return -ENOMEM; 8908 8909 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 8910 8911 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 8912 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 8913 err = -EINVAL; 8914 goto err_free; 8915 } 8916 8917 rcu_read_lock(); 8918 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 8919 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 8920 rcu_read_unlock(); 8921 err = -EINVAL; 8922 goto err_free; 8923 } 8924 8925 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 8926 assoc_data->ssid_len = ssid_elem->datalen; 8927 rcu_read_unlock(); 8928 8929 if (req->ap_mld_addr) 8930 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 8931 else 8932 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 8933 8934 if (ifmgd->associated) { 8935 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8936 8937 sdata_info(sdata, 8938 "disconnect from AP %pM for new assoc to %pM\n", 8939 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 8940 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8941 WLAN_REASON_UNSPECIFIED, 8942 false, frame_buf); 8943 8944 ieee80211_report_disconnect(sdata, frame_buf, 8945 sizeof(frame_buf), true, 8946 WLAN_REASON_UNSPECIFIED, 8947 false); 8948 } 8949 8950 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 8951 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 8952 sizeof(ifmgd->ht_capa_mask)); 8953 8954 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 8955 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 8956 sizeof(ifmgd->vht_capa_mask)); 8957 8958 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 8959 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 8960 sizeof(ifmgd->s1g_capa_mask)); 8961 8962 /* keep some setup (AP STA, channel, ...) if matching */ 8963 match_auth = ifmgd->auth_data && 8964 ether_addr_equal(ifmgd->auth_data->ap_addr, 8965 assoc_data->ap_addr) && 8966 ifmgd->auth_data->link_id == req->link_id; 8967 8968 if (req->ap_mld_addr) { 8969 uapsd_supported = true; 8970 8971 if (req->flags & (ASSOC_REQ_DISABLE_HT | 8972 ASSOC_REQ_DISABLE_VHT | 8973 ASSOC_REQ_DISABLE_HE | 8974 ASSOC_REQ_DISABLE_EHT)) { 8975 err = -EINVAL; 8976 goto err_free; 8977 } 8978 8979 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 8980 struct ieee80211_supported_band *sband; 8981 struct cfg80211_bss *link_cbss = req->links[i].bss; 8982 struct ieee80211_bss *bss; 8983 8984 if (!link_cbss) 8985 continue; 8986 8987 bss = (void *)link_cbss->priv; 8988 8989 if (!bss->wmm_used) { 8990 err = -EINVAL; 8991 req->links[i].error = err; 8992 goto err_free; 8993 } 8994 8995 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 8996 err = -EINVAL; 8997 req->links[i].error = err; 8998 goto err_free; 8999 } 9000 9001 link = sdata_dereference(sdata->link[i], sdata); 9002 if (link) 9003 ether_addr_copy(assoc_data->link[i].addr, 9004 link->conf->addr); 9005 else 9006 eth_random_addr(assoc_data->link[i].addr); 9007 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9008 9009 if (match_auth && i == assoc_link_id && link) 9010 assoc_data->link[i].conn = link->u.mgd.conn; 9011 else 9012 assoc_data->link[i].conn = 9013 ieee80211_conn_settings_unlimited; 9014 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9015 req, true, i, 9016 &assoc_data->link[i].conn); 9017 assoc_data->link[i].bss = link_cbss; 9018 assoc_data->link[i].disabled = req->links[i].disabled; 9019 9020 if (!bss->uapsd_supported) 9021 uapsd_supported = false; 9022 9023 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9024 err = -EINVAL; 9025 req->links[i].error = err; 9026 goto err_free; 9027 } 9028 9029 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9030 assoc_data, i); 9031 if (err) { 9032 err = -EINVAL; 9033 req->links[i].error = err; 9034 goto err_free; 9035 } 9036 } 9037 9038 assoc_data->wmm = true; 9039 } else { 9040 struct ieee80211_supported_band *sband; 9041 struct ieee80211_bss *bss = (void *)cbss->priv; 9042 9043 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9044 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9045 9046 assoc_data->wmm = bss->wmm_used && 9047 (local->hw.queues >= IEEE80211_NUM_ACS); 9048 9049 if (cbss->channel->band == NL80211_BAND_6GHZ && 9050 req->flags & (ASSOC_REQ_DISABLE_HT | 9051 ASSOC_REQ_DISABLE_VHT | 9052 ASSOC_REQ_DISABLE_HE)) { 9053 err = -EINVAL; 9054 goto err_free; 9055 } 9056 9057 sband = local->hw.wiphy->bands[cbss->channel->band]; 9058 9059 assoc_data->link[0].bss = cbss; 9060 9061 if (match_auth) 9062 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9063 else 9064 assoc_data->link[0].conn = 9065 ieee80211_conn_settings_unlimited; 9066 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9067 assoc_data->wmm, 0, 9068 &assoc_data->link[0].conn); 9069 9070 uapsd_supported = bss->uapsd_supported; 9071 9072 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9073 if (err) 9074 goto err_free; 9075 } 9076 9077 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9078 9079 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9080 err = -EBUSY; 9081 goto err_free; 9082 } 9083 9084 if (ifmgd->assoc_data) { 9085 err = -EBUSY; 9086 goto err_free; 9087 } 9088 9089 /* Cleanup is delayed if auth_data matches */ 9090 if (ifmgd->auth_data && !match_auth) 9091 ieee80211_destroy_auth_data(sdata, false); 9092 9093 if (req->ie && req->ie_len) { 9094 memcpy(assoc_data->ie, req->ie, req->ie_len); 9095 assoc_data->ie_len = req->ie_len; 9096 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9097 } else { 9098 assoc_data->ie_pos = assoc_data->ie; 9099 } 9100 9101 if (req->fils_kek) { 9102 /* should already be checked in cfg80211 - so warn */ 9103 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9104 err = -EINVAL; 9105 goto err_free; 9106 } 9107 memcpy(assoc_data->fils_kek, req->fils_kek, 9108 req->fils_kek_len); 9109 assoc_data->fils_kek_len = req->fils_kek_len; 9110 } 9111 9112 if (req->fils_nonces) 9113 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9114 2 * FILS_NONCE_LEN); 9115 9116 /* default timeout */ 9117 assoc_data->timeout = jiffies; 9118 assoc_data->timeout_started = true; 9119 9120 assoc_data->assoc_link_id = assoc_link_id; 9121 9122 if (req->ap_mld_addr) { 9123 /* if there was no authentication, set up the link */ 9124 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9125 if (err) 9126 goto err_clear; 9127 } 9128 9129 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9130 if (WARN_ON(!link)) { 9131 err = -EINVAL; 9132 goto err_clear; 9133 } 9134 9135 override = link->u.mgd.conn.mode != 9136 assoc_data->link[assoc_link_id].conn.mode || 9137 link->u.mgd.conn.bw_limit != 9138 assoc_data->link[assoc_link_id].conn.bw_limit; 9139 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9140 9141 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9142 assoc_link_id); 9143 9144 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9145 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9146 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9147 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9148 9149 if (assoc_data->wmm && uapsd_supported && 9150 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9151 assoc_data->uapsd = true; 9152 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9153 } else { 9154 assoc_data->uapsd = false; 9155 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9156 } 9157 9158 if (req->prev_bssid) 9159 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9160 9161 if (req->use_mfp) { 9162 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9163 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9164 } else { 9165 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9166 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9167 } 9168 9169 if (req->flags & ASSOC_REQ_USE_RRM) 9170 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9171 else 9172 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9173 9174 if (req->crypto.control_port) 9175 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9176 else 9177 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9178 9179 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9180 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9181 sdata->control_port_over_nl80211 = 9182 req->crypto.control_port_over_nl80211; 9183 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9184 9185 /* kick off associate process */ 9186 ifmgd->assoc_data = assoc_data; 9187 9188 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9189 if (!assoc_data->link[i].bss) 9190 continue; 9191 if (i == assoc_data->assoc_link_id) 9192 continue; 9193 /* only calculate the mode, hence link == NULL */ 9194 err = ieee80211_prep_channel(sdata, NULL, i, 9195 assoc_data->link[i].bss, true, 9196 &assoc_data->link[i].conn); 9197 if (err) { 9198 req->links[i].error = err; 9199 goto err_clear; 9200 } 9201 } 9202 9203 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9204 vif_cfg->ssid_len = assoc_data->ssid_len; 9205 9206 /* needed for transmitting the assoc frames properly */ 9207 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9208 9209 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9210 req->ap_mld_addr, true, 9211 &assoc_data->link[assoc_link_id].conn, 9212 override); 9213 if (err) 9214 goto err_clear; 9215 9216 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9217 const struct cfg80211_bss_ies *beacon_ies; 9218 9219 rcu_read_lock(); 9220 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9221 if (!beacon_ies) { 9222 /* 9223 * Wait up to one beacon interval ... 9224 * should this be more if we miss one? 9225 */ 9226 sdata_info(sdata, "waiting for beacon from %pM\n", 9227 link->u.mgd.bssid); 9228 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9229 assoc_data->timeout_started = true; 9230 assoc_data->need_beacon = true; 9231 } 9232 rcu_read_unlock(); 9233 } 9234 9235 run_again(sdata, assoc_data->timeout); 9236 9237 /* We are associating, clean up auth_data */ 9238 if (ifmgd->auth_data) 9239 ieee80211_destroy_auth_data(sdata, true); 9240 9241 return 0; 9242 err_clear: 9243 if (!ifmgd->auth_data) { 9244 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9245 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9246 BSS_CHANGED_BSSID); 9247 } 9248 ifmgd->assoc_data = NULL; 9249 err_free: 9250 kfree(assoc_data); 9251 return err; 9252 } 9253 9254 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9255 struct cfg80211_deauth_request *req) 9256 { 9257 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9258 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9259 bool tx = !req->local_state_change; 9260 struct ieee80211_prep_tx_info info = { 9261 .subtype = IEEE80211_STYPE_DEAUTH, 9262 }; 9263 9264 if (ifmgd->auth_data && 9265 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9266 sdata_info(sdata, 9267 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9268 req->bssid, req->reason_code, 9269 ieee80211_get_reason_code_string(req->reason_code)); 9270 9271 info.link_id = ifmgd->auth_data->link_id; 9272 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9273 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9274 IEEE80211_STYPE_DEAUTH, 9275 req->reason_code, tx, 9276 frame_buf); 9277 ieee80211_destroy_auth_data(sdata, false); 9278 ieee80211_report_disconnect(sdata, frame_buf, 9279 sizeof(frame_buf), true, 9280 req->reason_code, false); 9281 drv_mgd_complete_tx(sdata->local, sdata, &info); 9282 return 0; 9283 } 9284 9285 if (ifmgd->assoc_data && 9286 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 9287 sdata_info(sdata, 9288 "aborting association with %pM by local choice (Reason: %u=%s)\n", 9289 req->bssid, req->reason_code, 9290 ieee80211_get_reason_code_string(req->reason_code)); 9291 9292 info.link_id = ifmgd->assoc_data->assoc_link_id; 9293 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9294 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9295 IEEE80211_STYPE_DEAUTH, 9296 req->reason_code, tx, 9297 frame_buf); 9298 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9299 ieee80211_report_disconnect(sdata, frame_buf, 9300 sizeof(frame_buf), true, 9301 req->reason_code, false); 9302 drv_mgd_complete_tx(sdata->local, sdata, &info); 9303 return 0; 9304 } 9305 9306 if (ifmgd->associated && 9307 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 9308 sdata_info(sdata, 9309 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 9310 req->bssid, req->reason_code, 9311 ieee80211_get_reason_code_string(req->reason_code)); 9312 9313 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9314 req->reason_code, tx, frame_buf); 9315 ieee80211_report_disconnect(sdata, frame_buf, 9316 sizeof(frame_buf), true, 9317 req->reason_code, false); 9318 drv_mgd_complete_tx(sdata->local, sdata, &info); 9319 return 0; 9320 } 9321 9322 return -ENOTCONN; 9323 } 9324 9325 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 9326 struct cfg80211_disassoc_request *req) 9327 { 9328 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9329 9330 if (!sdata->u.mgd.associated || 9331 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 9332 return -ENOTCONN; 9333 9334 sdata_info(sdata, 9335 "disassociating from %pM by local choice (Reason: %u=%s)\n", 9336 req->ap_addr, req->reason_code, 9337 ieee80211_get_reason_code_string(req->reason_code)); 9338 9339 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 9340 req->reason_code, !req->local_state_change, 9341 frame_buf); 9342 9343 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 9344 req->reason_code, false); 9345 9346 return 0; 9347 } 9348 9349 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 9350 { 9351 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9352 &link->u.mgd.request_smps_work); 9353 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9354 &link->u.mgd.recalc_smps); 9355 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 9356 &link->u.mgd.csa.switch_work); 9357 } 9358 9359 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 9360 { 9361 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9362 9363 /* 9364 * Make sure some work items will not run after this, 9365 * they will not do anything but might not have been 9366 * cancelled when disconnecting. 9367 */ 9368 wiphy_work_cancel(sdata->local->hw.wiphy, 9369 &ifmgd->monitor_work); 9370 wiphy_work_cancel(sdata->local->hw.wiphy, 9371 &ifmgd->beacon_connection_loss_work); 9372 wiphy_work_cancel(sdata->local->hw.wiphy, 9373 &ifmgd->csa_connection_drop_work); 9374 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 9375 &ifmgd->tdls_peer_del_work); 9376 9377 if (ifmgd->assoc_data) 9378 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 9379 if (ifmgd->auth_data) 9380 ieee80211_destroy_auth_data(sdata, false); 9381 spin_lock_bh(&ifmgd->teardown_lock); 9382 if (ifmgd->teardown_skb) { 9383 kfree_skb(ifmgd->teardown_skb); 9384 ifmgd->teardown_skb = NULL; 9385 ifmgd->orig_teardown_skb = NULL; 9386 } 9387 kfree(ifmgd->assoc_req_ies); 9388 ifmgd->assoc_req_ies = NULL; 9389 ifmgd->assoc_req_ies_len = 0; 9390 spin_unlock_bh(&ifmgd->teardown_lock); 9391 del_timer_sync(&ifmgd->timer); 9392 } 9393 9394 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 9395 enum nl80211_cqm_rssi_threshold_event rssi_event, 9396 s32 rssi_level, 9397 gfp_t gfp) 9398 { 9399 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9400 9401 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 9402 9403 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 9404 } 9405 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 9406 9407 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 9408 { 9409 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9410 9411 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 9412 9413 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 9414 } 9415 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 9416 9417 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 9418 int rssi_min_thold, 9419 int rssi_max_thold) 9420 { 9421 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 9422 9423 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 9424 return; 9425 9426 /* 9427 * Scale up threshold values before storing it, as the RSSI averaging 9428 * algorithm uses a scaled up value as well. Change this scaling 9429 * factor if the RSSI averaging algorithm changes. 9430 */ 9431 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 9432 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 9433 } 9434 9435 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 9436 int rssi_min_thold, 9437 int rssi_max_thold) 9438 { 9439 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9440 9441 WARN_ON(rssi_min_thold == rssi_max_thold || 9442 rssi_min_thold > rssi_max_thold); 9443 9444 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 9445 rssi_max_thold); 9446 } 9447 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 9448 9449 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 9450 { 9451 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9452 9453 _ieee80211_enable_rssi_reports(sdata, 0, 0); 9454 } 9455 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 9456