1 /* 2 * BSS client mode implementation 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 4 * Copyright 2004, Instant802 Networks, Inc. 5 * Copyright 2005, Devicescape Software, Inc. 6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 8 * Copyright 2013-2014 Intel Mobile Communications GmbH 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 */ 14 15 #include <linux/delay.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/pm_qos.h> 23 #include <linux/crc32.h> 24 #include <linux/slab.h> 25 #include <linux/export.h> 26 #include <net/mac80211.h> 27 #include <asm/unaligned.h> 28 29 #include "ieee80211_i.h" 30 #include "driver-ops.h" 31 #include "rate.h" 32 #include "led.h" 33 34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_MAX_TRIES 3 38 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 40 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 41 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 42 #define IEEE80211_ASSOC_MAX_TRIES 3 43 44 static int max_nullfunc_tries = 2; 45 module_param(max_nullfunc_tries, int, 0644); 46 MODULE_PARM_DESC(max_nullfunc_tries, 47 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 48 49 static int max_probe_tries = 5; 50 module_param(max_probe_tries, int, 0644); 51 MODULE_PARM_DESC(max_probe_tries, 52 "Maximum probe tries before disconnecting (reason 4)."); 53 54 /* 55 * Beacon loss timeout is calculated as N frames times the 56 * advertised beacon interval. This may need to be somewhat 57 * higher than what hardware might detect to account for 58 * delays in the host processing frames. But since we also 59 * probe on beacon miss before declaring the connection lost 60 * default to what we want. 61 */ 62 static int beacon_loss_count = 7; 63 module_param(beacon_loss_count, int, 0644); 64 MODULE_PARM_DESC(beacon_loss_count, 65 "Number of beacon intervals before we decide beacon was lost."); 66 67 /* 68 * Time the connection can be idle before we probe 69 * it to see if we can still talk to the AP. 70 */ 71 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 72 /* 73 * Time we wait for a probe response after sending 74 * a probe request because of beacon loss or for 75 * checking the connection still works. 76 */ 77 static int probe_wait_ms = 500; 78 module_param(probe_wait_ms, int, 0644); 79 MODULE_PARM_DESC(probe_wait_ms, 80 "Maximum time(ms) to wait for probe response" 81 " before disconnecting (reason 4)."); 82 83 /* 84 * Weight given to the latest Beacon frame when calculating average signal 85 * strength for Beacon frames received in the current BSS. This must be 86 * between 1 and 15. 87 */ 88 #define IEEE80211_SIGNAL_AVE_WEIGHT 3 89 90 /* 91 * How many Beacon frames need to have been used in average signal strength 92 * before starting to indicate signal change events. 93 */ 94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 95 96 /* 97 * We can have multiple work items (and connection probing) 98 * scheduling this timer, but we need to take care to only 99 * reschedule it when it should fire _earlier_ than it was 100 * asked for before, or if it's not pending right now. This 101 * function ensures that. Note that it then is required to 102 * run this function for all timeouts after the first one 103 * has happened -- the work that runs from this timer will 104 * do that. 105 */ 106 static void run_again(struct ieee80211_sub_if_data *sdata, 107 unsigned long timeout) 108 { 109 sdata_assert_lock(sdata); 110 111 if (!timer_pending(&sdata->u.mgd.timer) || 112 time_before(timeout, sdata->u.mgd.timer.expires)) 113 mod_timer(&sdata->u.mgd.timer, timeout); 114 } 115 116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 117 { 118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 119 return; 120 121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 122 return; 123 124 mod_timer(&sdata->u.mgd.bcn_mon_timer, 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 126 } 127 128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 129 { 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 131 132 if (unlikely(!sdata->u.mgd.associated)) 133 return; 134 135 ifmgd->probe_send_count = 0; 136 137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 138 return; 139 140 mod_timer(&sdata->u.mgd.conn_mon_timer, 141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 142 } 143 144 static int ecw2cw(int ecw) 145 { 146 return (1 << ecw) - 1; 147 } 148 149 static u32 150 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 151 struct ieee80211_supported_band *sband, 152 struct ieee80211_channel *channel, 153 const struct ieee80211_ht_cap *ht_cap, 154 const struct ieee80211_ht_operation *ht_oper, 155 const struct ieee80211_vht_operation *vht_oper, 156 struct cfg80211_chan_def *chandef, bool tracking) 157 { 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 159 struct cfg80211_chan_def vht_chandef; 160 struct ieee80211_sta_ht_cap sta_ht_cap; 161 u32 ht_cfreq, ret; 162 163 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 164 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 165 166 chandef->chan = channel; 167 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 168 chandef->center_freq1 = channel->center_freq; 169 chandef->center_freq2 = 0; 170 171 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) { 172 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 173 goto out; 174 } 175 176 chandef->width = NL80211_CHAN_WIDTH_20; 177 178 if (!(ht_cap->cap_info & 179 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) { 180 ret = IEEE80211_STA_DISABLE_40MHZ; 181 vht_chandef = *chandef; 182 goto out; 183 } 184 185 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 186 channel->band); 187 /* check that channel matches the right operating channel */ 188 if (!tracking && channel->center_freq != ht_cfreq) { 189 /* 190 * It's possible that some APs are confused here; 191 * Netgear WNDR3700 sometimes reports 4 higher than 192 * the actual channel in association responses, but 193 * since we look at probe response/beacon data here 194 * it should be OK. 195 */ 196 sdata_info(sdata, 197 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 198 channel->center_freq, ht_cfreq, 199 ht_oper->primary_chan, channel->band); 200 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 201 goto out; 202 } 203 204 /* check 40 MHz support, if we have it */ 205 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 206 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 207 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 208 chandef->width = NL80211_CHAN_WIDTH_40; 209 chandef->center_freq1 += 10; 210 break; 211 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 212 chandef->width = NL80211_CHAN_WIDTH_40; 213 chandef->center_freq1 -= 10; 214 break; 215 } 216 } else { 217 /* 40 MHz (and 80 MHz) must be supported for VHT */ 218 ret = IEEE80211_STA_DISABLE_VHT; 219 /* also mark 40 MHz disabled */ 220 ret |= IEEE80211_STA_DISABLE_40MHZ; 221 goto out; 222 } 223 224 if (!vht_oper || !sband->vht_cap.vht_supported) { 225 ret = IEEE80211_STA_DISABLE_VHT; 226 goto out; 227 } 228 229 vht_chandef.chan = channel; 230 vht_chandef.center_freq1 = 231 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx, 232 channel->band); 233 vht_chandef.center_freq2 = 0; 234 235 switch (vht_oper->chan_width) { 236 case IEEE80211_VHT_CHANWIDTH_USE_HT: 237 vht_chandef.width = chandef->width; 238 vht_chandef.center_freq1 = chandef->center_freq1; 239 break; 240 case IEEE80211_VHT_CHANWIDTH_80MHZ: 241 vht_chandef.width = NL80211_CHAN_WIDTH_80; 242 break; 243 case IEEE80211_VHT_CHANWIDTH_160MHZ: 244 vht_chandef.width = NL80211_CHAN_WIDTH_160; 245 break; 246 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 247 vht_chandef.width = NL80211_CHAN_WIDTH_80P80; 248 vht_chandef.center_freq2 = 249 ieee80211_channel_to_frequency( 250 vht_oper->center_freq_seg2_idx, 251 channel->band); 252 break; 253 default: 254 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 255 sdata_info(sdata, 256 "AP VHT operation IE has invalid channel width (%d), disable VHT\n", 257 vht_oper->chan_width); 258 ret = IEEE80211_STA_DISABLE_VHT; 259 goto out; 260 } 261 262 if (!cfg80211_chandef_valid(&vht_chandef)) { 263 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 264 sdata_info(sdata, 265 "AP VHT information is invalid, disable VHT\n"); 266 ret = IEEE80211_STA_DISABLE_VHT; 267 goto out; 268 } 269 270 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 271 ret = 0; 272 goto out; 273 } 274 275 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 276 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 277 sdata_info(sdata, 278 "AP VHT information doesn't match HT, disable VHT\n"); 279 ret = IEEE80211_STA_DISABLE_VHT; 280 goto out; 281 } 282 283 *chandef = vht_chandef; 284 285 ret = 0; 286 287 out: 288 /* 289 * When tracking the current AP, don't do any further checks if the 290 * new chandef is identical to the one we're currently using for the 291 * connection. This keeps us from playing ping-pong with regulatory, 292 * without it the following can happen (for example): 293 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 294 * - AP advertises regdom US 295 * - CRDA loads regdom US with 80 MHz prohibited (old database) 296 * - the code below detects an unsupported channel, downgrades, and 297 * we disconnect from the AP in the caller 298 * - disconnect causes CRDA to reload world regdomain and the game 299 * starts anew. 300 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 301 * 302 * It seems possible that there are still scenarios with CSA or real 303 * bandwidth changes where a this could happen, but those cases are 304 * less common and wouldn't completely prevent using the AP. 305 */ 306 if (tracking && 307 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 308 return ret; 309 310 /* don't print the message below for VHT mismatch if VHT is disabled */ 311 if (ret & IEEE80211_STA_DISABLE_VHT) 312 vht_chandef = *chandef; 313 314 /* 315 * Ignore the DISABLED flag when we're already connected and only 316 * tracking the APs beacon for bandwidth changes - otherwise we 317 * might get disconnected here if we connect to an AP, update our 318 * regulatory information based on the AP's country IE and the 319 * information we have is wrong/outdated and disables the channel 320 * that we're actually using for the connection to the AP. 321 */ 322 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 323 tracking ? 0 : 324 IEEE80211_CHAN_DISABLED)) { 325 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 326 ret = IEEE80211_STA_DISABLE_HT | 327 IEEE80211_STA_DISABLE_VHT; 328 break; 329 } 330 331 ret |= ieee80211_chandef_downgrade(chandef); 332 } 333 334 if (chandef->width != vht_chandef.width && !tracking) 335 sdata_info(sdata, 336 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 337 338 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 339 return ret; 340 } 341 342 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 343 struct sta_info *sta, 344 const struct ieee80211_ht_cap *ht_cap, 345 const struct ieee80211_ht_operation *ht_oper, 346 const struct ieee80211_vht_operation *vht_oper, 347 const u8 *bssid, u32 *changed) 348 { 349 struct ieee80211_local *local = sdata->local; 350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 351 struct ieee80211_supported_band *sband; 352 struct ieee80211_channel *chan; 353 struct cfg80211_chan_def chandef; 354 u16 ht_opmode; 355 u32 flags; 356 enum ieee80211_sta_rx_bandwidth new_sta_bw; 357 int ret; 358 359 /* if HT was/is disabled, don't track any bandwidth changes */ 360 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 361 return 0; 362 363 /* don't check VHT if we associated as non-VHT station */ 364 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 365 vht_oper = NULL; 366 367 if (WARN_ON_ONCE(!sta)) 368 return -EINVAL; 369 370 /* 371 * if bss configuration changed store the new one - 372 * this may be applicable even if channel is identical 373 */ 374 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 375 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 376 *changed |= BSS_CHANGED_HT; 377 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 378 } 379 380 chan = sdata->vif.bss_conf.chandef.chan; 381 sband = local->hw.wiphy->bands[chan->band]; 382 383 /* calculate new channel (type) based on HT/VHT operation IEs */ 384 flags = ieee80211_determine_chantype(sdata, sband, chan, 385 ht_cap, ht_oper, vht_oper, 386 &chandef, true); 387 388 /* 389 * Downgrade the new channel if we associated with restricted 390 * capabilities. For example, if we associated as a 20 MHz STA 391 * to a 40 MHz AP (due to regulatory, capabilities or config 392 * reasons) then switching to a 40 MHz channel now won't do us 393 * any good -- we couldn't use it with the AP. 394 */ 395 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 396 chandef.width == NL80211_CHAN_WIDTH_80P80) 397 flags |= ieee80211_chandef_downgrade(&chandef); 398 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 399 chandef.width == NL80211_CHAN_WIDTH_160) 400 flags |= ieee80211_chandef_downgrade(&chandef); 401 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 402 chandef.width > NL80211_CHAN_WIDTH_20) 403 flags |= ieee80211_chandef_downgrade(&chandef); 404 405 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 406 return 0; 407 408 sdata_info(sdata, 409 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 410 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 411 chandef.center_freq1, chandef.center_freq2); 412 413 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 414 IEEE80211_STA_DISABLE_VHT | 415 IEEE80211_STA_DISABLE_40MHZ | 416 IEEE80211_STA_DISABLE_80P80MHZ | 417 IEEE80211_STA_DISABLE_160MHZ)) || 418 !cfg80211_chandef_valid(&chandef)) { 419 sdata_info(sdata, 420 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 421 ifmgd->bssid); 422 return -EINVAL; 423 } 424 425 switch (chandef.width) { 426 case NL80211_CHAN_WIDTH_20_NOHT: 427 case NL80211_CHAN_WIDTH_20: 428 new_sta_bw = IEEE80211_STA_RX_BW_20; 429 break; 430 case NL80211_CHAN_WIDTH_40: 431 new_sta_bw = IEEE80211_STA_RX_BW_40; 432 break; 433 case NL80211_CHAN_WIDTH_80: 434 new_sta_bw = IEEE80211_STA_RX_BW_80; 435 break; 436 case NL80211_CHAN_WIDTH_80P80: 437 case NL80211_CHAN_WIDTH_160: 438 new_sta_bw = IEEE80211_STA_RX_BW_160; 439 break; 440 default: 441 return -EINVAL; 442 } 443 444 if (new_sta_bw > sta->cur_max_bandwidth) 445 new_sta_bw = sta->cur_max_bandwidth; 446 447 if (new_sta_bw < sta->sta.bandwidth) { 448 sta->sta.bandwidth = new_sta_bw; 449 rate_control_rate_update(local, sband, sta, 450 IEEE80211_RC_BW_CHANGED); 451 } 452 453 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 454 if (ret) { 455 sdata_info(sdata, 456 "AP %pM changed bandwidth to incompatible one - disconnect\n", 457 ifmgd->bssid); 458 return ret; 459 } 460 461 if (new_sta_bw > sta->sta.bandwidth) { 462 sta->sta.bandwidth = new_sta_bw; 463 rate_control_rate_update(local, sband, sta, 464 IEEE80211_RC_BW_CHANGED); 465 } 466 467 return 0; 468 } 469 470 /* frame sending functions */ 471 472 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 473 struct sk_buff *skb, u8 ap_ht_param, 474 struct ieee80211_supported_band *sband, 475 struct ieee80211_channel *channel, 476 enum ieee80211_smps_mode smps) 477 { 478 u8 *pos; 479 u32 flags = channel->flags; 480 u16 cap; 481 struct ieee80211_sta_ht_cap ht_cap; 482 483 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 484 485 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 486 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 487 488 /* determine capability flags */ 489 cap = ht_cap.cap; 490 491 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 492 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 493 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 494 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 495 cap &= ~IEEE80211_HT_CAP_SGI_40; 496 } 497 break; 498 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 499 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 500 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 501 cap &= ~IEEE80211_HT_CAP_SGI_40; 502 } 503 break; 504 } 505 506 /* 507 * If 40 MHz was disabled associate as though we weren't 508 * capable of 40 MHz -- some broken APs will never fall 509 * back to trying to transmit in 20 MHz. 510 */ 511 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 512 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 513 cap &= ~IEEE80211_HT_CAP_SGI_40; 514 } 515 516 /* set SM PS mode properly */ 517 cap &= ~IEEE80211_HT_CAP_SM_PS; 518 switch (smps) { 519 case IEEE80211_SMPS_AUTOMATIC: 520 case IEEE80211_SMPS_NUM_MODES: 521 WARN_ON(1); 522 case IEEE80211_SMPS_OFF: 523 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 524 IEEE80211_HT_CAP_SM_PS_SHIFT; 525 break; 526 case IEEE80211_SMPS_STATIC: 527 cap |= WLAN_HT_CAP_SM_PS_STATIC << 528 IEEE80211_HT_CAP_SM_PS_SHIFT; 529 break; 530 case IEEE80211_SMPS_DYNAMIC: 531 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 532 IEEE80211_HT_CAP_SM_PS_SHIFT; 533 break; 534 } 535 536 /* reserve and fill IE */ 537 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 538 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 539 } 540 541 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 542 struct sk_buff *skb, 543 struct ieee80211_supported_band *sband, 544 struct ieee80211_vht_cap *ap_vht_cap) 545 { 546 u8 *pos; 547 u32 cap; 548 struct ieee80211_sta_vht_cap vht_cap; 549 u32 mask, ap_bf_sts, our_bf_sts; 550 551 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 552 553 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 554 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 555 556 /* determine capability flags */ 557 cap = vht_cap.cap; 558 559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 560 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 561 562 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 563 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 564 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 565 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 566 } 567 568 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 569 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 570 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 571 } 572 573 /* 574 * Some APs apparently get confused if our capabilities are better 575 * than theirs, so restrict what we advertise in the assoc request. 576 */ 577 if (!(ap_vht_cap->vht_cap_info & 578 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 579 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE; 580 581 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 582 583 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 584 our_bf_sts = cap & mask; 585 586 if (ap_bf_sts < our_bf_sts) { 587 cap &= ~mask; 588 cap |= ap_bf_sts; 589 } 590 591 /* reserve and fill IE */ 592 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 593 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 594 } 595 596 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 597 { 598 struct ieee80211_local *local = sdata->local; 599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 600 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 601 struct sk_buff *skb; 602 struct ieee80211_mgmt *mgmt; 603 u8 *pos, qos_info; 604 size_t offset = 0, noffset; 605 int i, count, rates_len, supp_rates_len, shift; 606 u16 capab; 607 struct ieee80211_supported_band *sband; 608 struct ieee80211_chanctx_conf *chanctx_conf; 609 struct ieee80211_channel *chan; 610 u32 rate_flags, rates = 0; 611 612 sdata_assert_lock(sdata); 613 614 rcu_read_lock(); 615 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 616 if (WARN_ON(!chanctx_conf)) { 617 rcu_read_unlock(); 618 return; 619 } 620 chan = chanctx_conf->def.chan; 621 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 622 rcu_read_unlock(); 623 sband = local->hw.wiphy->bands[chan->band]; 624 shift = ieee80211_vif_get_shift(&sdata->vif); 625 626 if (assoc_data->supp_rates_len) { 627 /* 628 * Get all rates supported by the device and the AP as 629 * some APs don't like getting a superset of their rates 630 * in the association request (e.g. D-Link DAP 1353 in 631 * b-only mode)... 632 */ 633 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 634 assoc_data->supp_rates, 635 assoc_data->supp_rates_len, 636 &rates); 637 } else { 638 /* 639 * In case AP not provide any supported rates information 640 * before association, we send information element(s) with 641 * all rates that we support. 642 */ 643 rates_len = 0; 644 for (i = 0; i < sband->n_bitrates; i++) { 645 if ((rate_flags & sband->bitrates[i].flags) 646 != rate_flags) 647 continue; 648 rates |= BIT(i); 649 rates_len++; 650 } 651 } 652 653 skb = alloc_skb(local->hw.extra_tx_headroom + 654 sizeof(*mgmt) + /* bit too much but doesn't matter */ 655 2 + assoc_data->ssid_len + /* SSID */ 656 4 + rates_len + /* (extended) rates */ 657 4 + /* power capability */ 658 2 + 2 * sband->n_channels + /* supported channels */ 659 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 660 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 661 assoc_data->ie_len + /* extra IEs */ 662 9, /* WMM */ 663 GFP_KERNEL); 664 if (!skb) 665 return; 666 667 skb_reserve(skb, local->hw.extra_tx_headroom); 668 669 capab = WLAN_CAPABILITY_ESS; 670 671 if (sband->band == IEEE80211_BAND_2GHZ) { 672 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) 673 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 674 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) 675 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 676 } 677 678 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 679 capab |= WLAN_CAPABILITY_PRIVACY; 680 681 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 682 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) 683 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 684 685 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 686 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 687 688 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); 689 memset(mgmt, 0, 24); 690 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 691 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 692 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 693 694 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 695 skb_put(skb, 10); 696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 697 IEEE80211_STYPE_REASSOC_REQ); 698 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 699 mgmt->u.reassoc_req.listen_interval = 700 cpu_to_le16(local->hw.conf.listen_interval); 701 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 702 ETH_ALEN); 703 } else { 704 skb_put(skb, 4); 705 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 706 IEEE80211_STYPE_ASSOC_REQ); 707 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 708 mgmt->u.assoc_req.listen_interval = 709 cpu_to_le16(local->hw.conf.listen_interval); 710 } 711 712 /* SSID */ 713 pos = skb_put(skb, 2 + assoc_data->ssid_len); 714 *pos++ = WLAN_EID_SSID; 715 *pos++ = assoc_data->ssid_len; 716 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 717 718 /* add all rates which were marked to be used above */ 719 supp_rates_len = rates_len; 720 if (supp_rates_len > 8) 721 supp_rates_len = 8; 722 723 pos = skb_put(skb, supp_rates_len + 2); 724 *pos++ = WLAN_EID_SUPP_RATES; 725 *pos++ = supp_rates_len; 726 727 count = 0; 728 for (i = 0; i < sband->n_bitrates; i++) { 729 if (BIT(i) & rates) { 730 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 731 5 * (1 << shift)); 732 *pos++ = (u8) rate; 733 if (++count == 8) 734 break; 735 } 736 } 737 738 if (rates_len > count) { 739 pos = skb_put(skb, rates_len - count + 2); 740 *pos++ = WLAN_EID_EXT_SUPP_RATES; 741 *pos++ = rates_len - count; 742 743 for (i++; i < sband->n_bitrates; i++) { 744 if (BIT(i) & rates) { 745 int rate; 746 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 747 5 * (1 << shift)); 748 *pos++ = (u8) rate; 749 } 750 } 751 } 752 753 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 754 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 755 pos = skb_put(skb, 4); 756 *pos++ = WLAN_EID_PWR_CAPABILITY; 757 *pos++ = 2; 758 *pos++ = 0; /* min tx power */ 759 /* max tx power */ 760 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 761 } 762 763 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 764 /* TODO: get this in reg domain format */ 765 pos = skb_put(skb, 2 * sband->n_channels + 2); 766 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 767 *pos++ = 2 * sband->n_channels; 768 for (i = 0; i < sband->n_channels; i++) { 769 *pos++ = ieee80211_frequency_to_channel( 770 sband->channels[i].center_freq); 771 *pos++ = 1; /* one channel in the subband*/ 772 } 773 } 774 775 /* if present, add any custom IEs that go before HT */ 776 if (assoc_data->ie_len) { 777 static const u8 before_ht[] = { 778 WLAN_EID_SSID, 779 WLAN_EID_SUPP_RATES, 780 WLAN_EID_EXT_SUPP_RATES, 781 WLAN_EID_PWR_CAPABILITY, 782 WLAN_EID_SUPPORTED_CHANNELS, 783 WLAN_EID_RSN, 784 WLAN_EID_QOS_CAPA, 785 WLAN_EID_RRM_ENABLED_CAPABILITIES, 786 WLAN_EID_MOBILITY_DOMAIN, 787 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 788 WLAN_EID_RIC_DATA, /* reassoc only */ 789 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 790 }; 791 static const u8 after_ric[] = { 792 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 793 WLAN_EID_HT_CAPABILITY, 794 WLAN_EID_BSS_COEX_2040, 795 WLAN_EID_EXT_CAPABILITY, 796 WLAN_EID_QOS_TRAFFIC_CAPA, 797 WLAN_EID_TIM_BCAST_REQ, 798 WLAN_EID_INTERWORKING, 799 /* 60GHz doesn't happen right now */ 800 WLAN_EID_VHT_CAPABILITY, 801 WLAN_EID_OPMODE_NOTIF, 802 }; 803 804 noffset = ieee80211_ie_split_ric(assoc_data->ie, 805 assoc_data->ie_len, 806 before_ht, 807 ARRAY_SIZE(before_ht), 808 after_ric, 809 ARRAY_SIZE(after_ric), 810 offset); 811 pos = skb_put(skb, noffset - offset); 812 memcpy(pos, assoc_data->ie + offset, noffset - offset); 813 offset = noffset; 814 } 815 816 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 817 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 818 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 819 820 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 821 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 822 sband, chan, sdata->smps_mode); 823 824 /* if present, add any custom IEs that go before VHT */ 825 if (assoc_data->ie_len) { 826 static const u8 before_vht[] = { 827 WLAN_EID_SSID, 828 WLAN_EID_SUPP_RATES, 829 WLAN_EID_EXT_SUPP_RATES, 830 WLAN_EID_PWR_CAPABILITY, 831 WLAN_EID_SUPPORTED_CHANNELS, 832 WLAN_EID_RSN, 833 WLAN_EID_QOS_CAPA, 834 WLAN_EID_RRM_ENABLED_CAPABILITIES, 835 WLAN_EID_MOBILITY_DOMAIN, 836 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 837 WLAN_EID_HT_CAPABILITY, 838 WLAN_EID_BSS_COEX_2040, 839 WLAN_EID_EXT_CAPABILITY, 840 WLAN_EID_QOS_TRAFFIC_CAPA, 841 WLAN_EID_TIM_BCAST_REQ, 842 WLAN_EID_INTERWORKING, 843 }; 844 845 /* RIC already taken above, so no need to handle here anymore */ 846 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 847 before_vht, ARRAY_SIZE(before_vht), 848 offset); 849 pos = skb_put(skb, noffset - offset); 850 memcpy(pos, assoc_data->ie + offset, noffset - offset); 851 offset = noffset; 852 } 853 854 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 855 ieee80211_add_vht_ie(sdata, skb, sband, 856 &assoc_data->ap_vht_cap); 857 858 /* if present, add any custom non-vendor IEs that go after HT */ 859 if (assoc_data->ie_len) { 860 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 861 assoc_data->ie_len, 862 offset); 863 pos = skb_put(skb, noffset - offset); 864 memcpy(pos, assoc_data->ie + offset, noffset - offset); 865 offset = noffset; 866 } 867 868 if (assoc_data->wmm) { 869 if (assoc_data->uapsd) { 870 qos_info = ifmgd->uapsd_queues; 871 qos_info |= (ifmgd->uapsd_max_sp_len << 872 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 873 } else { 874 qos_info = 0; 875 } 876 877 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 878 } 879 880 /* add any remaining custom (i.e. vendor specific here) IEs */ 881 if (assoc_data->ie_len) { 882 noffset = assoc_data->ie_len; 883 pos = skb_put(skb, noffset - offset); 884 memcpy(pos, assoc_data->ie + offset, noffset - offset); 885 } 886 887 drv_mgd_prepare_tx(local, sdata); 888 889 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 890 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 891 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 892 IEEE80211_TX_INTFL_MLME_CONN_TX; 893 ieee80211_tx_skb(sdata, skb); 894 } 895 896 void ieee80211_send_pspoll(struct ieee80211_local *local, 897 struct ieee80211_sub_if_data *sdata) 898 { 899 struct ieee80211_pspoll *pspoll; 900 struct sk_buff *skb; 901 902 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 903 if (!skb) 904 return; 905 906 pspoll = (struct ieee80211_pspoll *) skb->data; 907 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 908 909 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 910 ieee80211_tx_skb(sdata, skb); 911 } 912 913 void ieee80211_send_nullfunc(struct ieee80211_local *local, 914 struct ieee80211_sub_if_data *sdata, 915 int powersave) 916 { 917 struct sk_buff *skb; 918 struct ieee80211_hdr_3addr *nullfunc; 919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 920 921 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); 922 if (!skb) 923 return; 924 925 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 926 if (powersave) 927 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 928 929 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 930 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 931 932 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 933 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 934 935 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 936 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 937 938 ieee80211_tx_skb(sdata, skb); 939 } 940 941 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 942 struct ieee80211_sub_if_data *sdata) 943 { 944 struct sk_buff *skb; 945 struct ieee80211_hdr *nullfunc; 946 __le16 fc; 947 948 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 949 return; 950 951 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 952 if (!skb) 953 return; 954 955 skb_reserve(skb, local->hw.extra_tx_headroom); 956 957 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); 958 memset(nullfunc, 0, 30); 959 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 960 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 961 nullfunc->frame_control = fc; 962 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 963 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 964 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 965 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 966 967 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 968 ieee80211_tx_skb(sdata, skb); 969 } 970 971 /* spectrum management related things */ 972 static void ieee80211_chswitch_work(struct work_struct *work) 973 { 974 struct ieee80211_sub_if_data *sdata = 975 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 976 struct ieee80211_local *local = sdata->local; 977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 978 int ret; 979 980 if (!ieee80211_sdata_running(sdata)) 981 return; 982 983 sdata_lock(sdata); 984 mutex_lock(&local->mtx); 985 mutex_lock(&local->chanctx_mtx); 986 987 if (!ifmgd->associated) 988 goto out; 989 990 if (!sdata->vif.csa_active) 991 goto out; 992 993 /* 994 * using reservation isn't immediate as it may be deferred until later 995 * with multi-vif. once reservation is complete it will re-schedule the 996 * work with no reserved_chanctx so verify chandef to check if it 997 * completed successfully 998 */ 999 1000 if (sdata->reserved_chanctx) { 1001 /* 1002 * with multi-vif csa driver may call ieee80211_csa_finish() 1003 * many times while waiting for other interfaces to use their 1004 * reservations 1005 */ 1006 if (sdata->reserved_ready) 1007 goto out; 1008 1009 ret = ieee80211_vif_use_reserved_context(sdata); 1010 if (ret) { 1011 sdata_info(sdata, 1012 "failed to use reserved channel context, disconnecting (err=%d)\n", 1013 ret); 1014 ieee80211_queue_work(&sdata->local->hw, 1015 &ifmgd->csa_connection_drop_work); 1016 goto out; 1017 } 1018 1019 goto out; 1020 } 1021 1022 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1023 &sdata->csa_chandef)) { 1024 sdata_info(sdata, 1025 "failed to finalize channel switch, disconnecting\n"); 1026 ieee80211_queue_work(&sdata->local->hw, 1027 &ifmgd->csa_connection_drop_work); 1028 goto out; 1029 } 1030 1031 /* XXX: shouldn't really modify cfg80211-owned data! */ 1032 ifmgd->associated->channel = sdata->csa_chandef.chan; 1033 1034 ifmgd->csa_waiting_bcn = true; 1035 1036 ieee80211_sta_reset_beacon_monitor(sdata); 1037 ieee80211_sta_reset_conn_monitor(sdata); 1038 1039 out: 1040 mutex_unlock(&local->chanctx_mtx); 1041 mutex_unlock(&local->mtx); 1042 sdata_unlock(sdata); 1043 } 1044 1045 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1046 { 1047 struct ieee80211_local *local = sdata->local; 1048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1049 int ret; 1050 1051 sdata_assert_lock(sdata); 1052 1053 WARN_ON(!sdata->vif.csa_active); 1054 1055 if (sdata->csa_block_tx) { 1056 ieee80211_wake_vif_queues(local, sdata, 1057 IEEE80211_QUEUE_STOP_REASON_CSA); 1058 sdata->csa_block_tx = false; 1059 } 1060 1061 sdata->vif.csa_active = false; 1062 ifmgd->csa_waiting_bcn = false; 1063 1064 ret = drv_post_channel_switch(sdata); 1065 if (ret) { 1066 sdata_info(sdata, 1067 "driver post channel switch failed, disconnecting\n"); 1068 ieee80211_queue_work(&local->hw, 1069 &ifmgd->csa_connection_drop_work); 1070 return; 1071 } 1072 1073 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1074 } 1075 1076 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1077 { 1078 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1080 1081 trace_api_chswitch_done(sdata, success); 1082 if (!success) { 1083 sdata_info(sdata, 1084 "driver channel switch failed, disconnecting\n"); 1085 ieee80211_queue_work(&sdata->local->hw, 1086 &ifmgd->csa_connection_drop_work); 1087 } else { 1088 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1089 } 1090 } 1091 EXPORT_SYMBOL(ieee80211_chswitch_done); 1092 1093 static void ieee80211_chswitch_timer(unsigned long data) 1094 { 1095 struct ieee80211_sub_if_data *sdata = 1096 (struct ieee80211_sub_if_data *) data; 1097 1098 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1099 } 1100 1101 static void 1102 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1103 u64 timestamp, u32 device_timestamp, 1104 struct ieee802_11_elems *elems, 1105 bool beacon) 1106 { 1107 struct ieee80211_local *local = sdata->local; 1108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1109 struct cfg80211_bss *cbss = ifmgd->associated; 1110 struct ieee80211_chanctx_conf *conf; 1111 struct ieee80211_chanctx *chanctx; 1112 enum ieee80211_band current_band; 1113 struct ieee80211_csa_ie csa_ie; 1114 struct ieee80211_channel_switch ch_switch; 1115 int res; 1116 1117 sdata_assert_lock(sdata); 1118 1119 if (!cbss) 1120 return; 1121 1122 if (local->scanning) 1123 return; 1124 1125 /* disregard subsequent announcements if we are already processing */ 1126 if (sdata->vif.csa_active) 1127 return; 1128 1129 current_band = cbss->channel->band; 1130 memset(&csa_ie, 0, sizeof(csa_ie)); 1131 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1132 ifmgd->flags, 1133 ifmgd->associated->bssid, &csa_ie); 1134 if (res < 0) 1135 ieee80211_queue_work(&local->hw, 1136 &ifmgd->csa_connection_drop_work); 1137 if (res) 1138 return; 1139 1140 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1141 IEEE80211_CHAN_DISABLED)) { 1142 sdata_info(sdata, 1143 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1144 ifmgd->associated->bssid, 1145 csa_ie.chandef.chan->center_freq, 1146 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1147 csa_ie.chandef.center_freq2); 1148 ieee80211_queue_work(&local->hw, 1149 &ifmgd->csa_connection_drop_work); 1150 return; 1151 } 1152 1153 mutex_lock(&local->mtx); 1154 mutex_lock(&local->chanctx_mtx); 1155 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1156 lockdep_is_held(&local->chanctx_mtx)); 1157 if (!conf) { 1158 sdata_info(sdata, 1159 "no channel context assigned to vif?, disconnecting\n"); 1160 ieee80211_queue_work(&local->hw, 1161 &ifmgd->csa_connection_drop_work); 1162 mutex_unlock(&local->chanctx_mtx); 1163 mutex_unlock(&local->mtx); 1164 return; 1165 } 1166 1167 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1168 1169 if (local->use_chanctx && 1170 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) { 1171 sdata_info(sdata, 1172 "driver doesn't support chan-switch with channel contexts\n"); 1173 ieee80211_queue_work(&local->hw, 1174 &ifmgd->csa_connection_drop_work); 1175 mutex_unlock(&local->chanctx_mtx); 1176 mutex_unlock(&local->mtx); 1177 return; 1178 } 1179 1180 ch_switch.timestamp = timestamp; 1181 ch_switch.device_timestamp = device_timestamp; 1182 ch_switch.block_tx = csa_ie.mode; 1183 ch_switch.chandef = csa_ie.chandef; 1184 ch_switch.count = csa_ie.count; 1185 1186 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1187 sdata_info(sdata, 1188 "preparing for channel switch failed, disconnecting\n"); 1189 ieee80211_queue_work(&local->hw, 1190 &ifmgd->csa_connection_drop_work); 1191 mutex_unlock(&local->chanctx_mtx); 1192 mutex_unlock(&local->mtx); 1193 return; 1194 } 1195 1196 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1197 chanctx->mode, false); 1198 if (res) { 1199 sdata_info(sdata, 1200 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1201 res); 1202 ieee80211_queue_work(&local->hw, 1203 &ifmgd->csa_connection_drop_work); 1204 mutex_unlock(&local->chanctx_mtx); 1205 mutex_unlock(&local->mtx); 1206 return; 1207 } 1208 mutex_unlock(&local->chanctx_mtx); 1209 1210 sdata->vif.csa_active = true; 1211 sdata->csa_chandef = csa_ie.chandef; 1212 sdata->csa_block_tx = csa_ie.mode; 1213 1214 if (sdata->csa_block_tx) 1215 ieee80211_stop_vif_queues(local, sdata, 1216 IEEE80211_QUEUE_STOP_REASON_CSA); 1217 mutex_unlock(&local->mtx); 1218 1219 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1220 csa_ie.count); 1221 1222 if (local->ops->channel_switch) { 1223 /* use driver's channel switch callback */ 1224 drv_channel_switch(local, sdata, &ch_switch); 1225 return; 1226 } 1227 1228 /* channel switch handled in software */ 1229 if (csa_ie.count <= 1) 1230 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1231 else 1232 mod_timer(&ifmgd->chswitch_timer, 1233 TU_TO_EXP_TIME((csa_ie.count - 1) * 1234 cbss->beacon_interval)); 1235 } 1236 1237 static bool 1238 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1239 struct ieee80211_channel *channel, 1240 const u8 *country_ie, u8 country_ie_len, 1241 const u8 *pwr_constr_elem, 1242 int *chan_pwr, int *pwr_reduction) 1243 { 1244 struct ieee80211_country_ie_triplet *triplet; 1245 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1246 int i, chan_increment; 1247 bool have_chan_pwr = false; 1248 1249 /* Invalid IE */ 1250 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1251 return false; 1252 1253 triplet = (void *)(country_ie + 3); 1254 country_ie_len -= 3; 1255 1256 switch (channel->band) { 1257 default: 1258 WARN_ON_ONCE(1); 1259 /* fall through */ 1260 case IEEE80211_BAND_2GHZ: 1261 case IEEE80211_BAND_60GHZ: 1262 chan_increment = 1; 1263 break; 1264 case IEEE80211_BAND_5GHZ: 1265 chan_increment = 4; 1266 break; 1267 } 1268 1269 /* find channel */ 1270 while (country_ie_len >= 3) { 1271 u8 first_channel = triplet->chans.first_channel; 1272 1273 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1274 goto next; 1275 1276 for (i = 0; i < triplet->chans.num_channels; i++) { 1277 if (first_channel + i * chan_increment == chan) { 1278 have_chan_pwr = true; 1279 *chan_pwr = triplet->chans.max_power; 1280 break; 1281 } 1282 } 1283 if (have_chan_pwr) 1284 break; 1285 1286 next: 1287 triplet++; 1288 country_ie_len -= 3; 1289 } 1290 1291 if (have_chan_pwr && pwr_constr_elem) 1292 *pwr_reduction = *pwr_constr_elem; 1293 else 1294 *pwr_reduction = 0; 1295 1296 return have_chan_pwr; 1297 } 1298 1299 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1300 struct ieee80211_channel *channel, 1301 const u8 *cisco_dtpc_ie, 1302 int *pwr_level) 1303 { 1304 /* From practical testing, the first data byte of the DTPC element 1305 * seems to contain the requested dBm level, and the CLI on Cisco 1306 * APs clearly state the range is -127 to 127 dBm, which indicates 1307 * a signed byte, although it seemingly never actually goes negative. 1308 * The other byte seems to always be zero. 1309 */ 1310 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1311 } 1312 1313 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1314 struct ieee80211_channel *channel, 1315 struct ieee80211_mgmt *mgmt, 1316 const u8 *country_ie, u8 country_ie_len, 1317 const u8 *pwr_constr_ie, 1318 const u8 *cisco_dtpc_ie) 1319 { 1320 bool has_80211h_pwr = false, has_cisco_pwr = false; 1321 int chan_pwr = 0, pwr_reduction_80211h = 0; 1322 int pwr_level_cisco, pwr_level_80211h; 1323 int new_ap_level; 1324 __le16 capab = mgmt->u.probe_resp.capab_info; 1325 1326 if (country_ie && 1327 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1328 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1329 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1330 sdata, channel, country_ie, country_ie_len, 1331 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1332 pwr_level_80211h = 1333 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1334 } 1335 1336 if (cisco_dtpc_ie) { 1337 ieee80211_find_cisco_dtpc( 1338 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1339 has_cisco_pwr = true; 1340 } 1341 1342 if (!has_80211h_pwr && !has_cisco_pwr) 1343 return 0; 1344 1345 /* If we have both 802.11h and Cisco DTPC, apply both limits 1346 * by picking the smallest of the two power levels advertised. 1347 */ 1348 if (has_80211h_pwr && 1349 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1350 sdata_info(sdata, 1351 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1352 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1353 sdata->u.mgd.bssid); 1354 new_ap_level = pwr_level_80211h; 1355 } else { /* has_cisco_pwr is always true here. */ 1356 sdata_info(sdata, 1357 "Limiting TX power to %d dBm as advertised by %pM\n", 1358 pwr_level_cisco, sdata->u.mgd.bssid); 1359 new_ap_level = pwr_level_cisco; 1360 } 1361 1362 if (sdata->ap_power_level == new_ap_level) 1363 return 0; 1364 1365 sdata->ap_power_level = new_ap_level; 1366 if (__ieee80211_recalc_txpower(sdata)) 1367 return BSS_CHANGED_TXPOWER; 1368 return 0; 1369 } 1370 1371 /* powersave */ 1372 static void ieee80211_enable_ps(struct ieee80211_local *local, 1373 struct ieee80211_sub_if_data *sdata) 1374 { 1375 struct ieee80211_conf *conf = &local->hw.conf; 1376 1377 /* 1378 * If we are scanning right now then the parameters will 1379 * take effect when scan finishes. 1380 */ 1381 if (local->scanning) 1382 return; 1383 1384 if (conf->dynamic_ps_timeout > 0 && 1385 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { 1386 mod_timer(&local->dynamic_ps_timer, jiffies + 1387 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1388 } else { 1389 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) 1390 ieee80211_send_nullfunc(local, sdata, 1); 1391 1392 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && 1393 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) 1394 return; 1395 1396 conf->flags |= IEEE80211_CONF_PS; 1397 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1398 } 1399 } 1400 1401 static void ieee80211_change_ps(struct ieee80211_local *local) 1402 { 1403 struct ieee80211_conf *conf = &local->hw.conf; 1404 1405 if (local->ps_sdata) { 1406 ieee80211_enable_ps(local, local->ps_sdata); 1407 } else if (conf->flags & IEEE80211_CONF_PS) { 1408 conf->flags &= ~IEEE80211_CONF_PS; 1409 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1410 del_timer_sync(&local->dynamic_ps_timer); 1411 cancel_work_sync(&local->dynamic_ps_enable_work); 1412 } 1413 } 1414 1415 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1416 { 1417 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1418 struct sta_info *sta = NULL; 1419 bool authorized = false; 1420 1421 if (!mgd->powersave) 1422 return false; 1423 1424 if (mgd->broken_ap) 1425 return false; 1426 1427 if (!mgd->associated) 1428 return false; 1429 1430 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1431 return false; 1432 1433 if (!mgd->have_beacon) 1434 return false; 1435 1436 rcu_read_lock(); 1437 sta = sta_info_get(sdata, mgd->bssid); 1438 if (sta) 1439 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1440 rcu_read_unlock(); 1441 1442 return authorized; 1443 } 1444 1445 /* need to hold RTNL or interface lock */ 1446 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) 1447 { 1448 struct ieee80211_sub_if_data *sdata, *found = NULL; 1449 int count = 0; 1450 int timeout; 1451 1452 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { 1453 local->ps_sdata = NULL; 1454 return; 1455 } 1456 1457 list_for_each_entry(sdata, &local->interfaces, list) { 1458 if (!ieee80211_sdata_running(sdata)) 1459 continue; 1460 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1461 /* If an AP vif is found, then disable PS 1462 * by setting the count to zero thereby setting 1463 * ps_sdata to NULL. 1464 */ 1465 count = 0; 1466 break; 1467 } 1468 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1469 continue; 1470 found = sdata; 1471 count++; 1472 } 1473 1474 if (count == 1 && ieee80211_powersave_allowed(found)) { 1475 s32 beaconint_us; 1476 1477 if (latency < 0) 1478 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY); 1479 1480 beaconint_us = ieee80211_tu_to_usec( 1481 found->vif.bss_conf.beacon_int); 1482 1483 timeout = local->dynamic_ps_forced_timeout; 1484 if (timeout < 0) { 1485 /* 1486 * Go to full PSM if the user configures a very low 1487 * latency requirement. 1488 * The 2000 second value is there for compatibility 1489 * until the PM_QOS_NETWORK_LATENCY is configured 1490 * with real values. 1491 */ 1492 if (latency > (1900 * USEC_PER_MSEC) && 1493 latency != (2000 * USEC_PER_SEC)) 1494 timeout = 0; 1495 else 1496 timeout = 100; 1497 } 1498 local->hw.conf.dynamic_ps_timeout = timeout; 1499 1500 if (beaconint_us > latency) { 1501 local->ps_sdata = NULL; 1502 } else { 1503 int maxslp = 1; 1504 u8 dtimper = found->u.mgd.dtim_period; 1505 1506 /* If the TIM IE is invalid, pretend the value is 1 */ 1507 if (!dtimper) 1508 dtimper = 1; 1509 else if (dtimper > 1) 1510 maxslp = min_t(int, dtimper, 1511 latency / beaconint_us); 1512 1513 local->hw.conf.max_sleep_period = maxslp; 1514 local->hw.conf.ps_dtim_period = dtimper; 1515 local->ps_sdata = found; 1516 } 1517 } else { 1518 local->ps_sdata = NULL; 1519 } 1520 1521 ieee80211_change_ps(local); 1522 } 1523 1524 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1525 { 1526 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1527 1528 if (sdata->vif.bss_conf.ps != ps_allowed) { 1529 sdata->vif.bss_conf.ps = ps_allowed; 1530 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1531 } 1532 } 1533 1534 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1535 { 1536 struct ieee80211_local *local = 1537 container_of(work, struct ieee80211_local, 1538 dynamic_ps_disable_work); 1539 1540 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1541 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1542 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1543 } 1544 1545 ieee80211_wake_queues_by_reason(&local->hw, 1546 IEEE80211_MAX_QUEUE_MAP, 1547 IEEE80211_QUEUE_STOP_REASON_PS, 1548 false); 1549 } 1550 1551 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1552 { 1553 struct ieee80211_local *local = 1554 container_of(work, struct ieee80211_local, 1555 dynamic_ps_enable_work); 1556 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1557 struct ieee80211_if_managed *ifmgd; 1558 unsigned long flags; 1559 int q; 1560 1561 /* can only happen when PS was just disabled anyway */ 1562 if (!sdata) 1563 return; 1564 1565 ifmgd = &sdata->u.mgd; 1566 1567 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1568 return; 1569 1570 if (local->hw.conf.dynamic_ps_timeout > 0) { 1571 /* don't enter PS if TX frames are pending */ 1572 if (drv_tx_frames_pending(local)) { 1573 mod_timer(&local->dynamic_ps_timer, jiffies + 1574 msecs_to_jiffies( 1575 local->hw.conf.dynamic_ps_timeout)); 1576 return; 1577 } 1578 1579 /* 1580 * transmission can be stopped by others which leads to 1581 * dynamic_ps_timer expiry. Postpone the ps timer if it 1582 * is not the actual idle state. 1583 */ 1584 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1585 for (q = 0; q < local->hw.queues; q++) { 1586 if (local->queue_stop_reasons[q]) { 1587 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1588 flags); 1589 mod_timer(&local->dynamic_ps_timer, jiffies + 1590 msecs_to_jiffies( 1591 local->hw.conf.dynamic_ps_timeout)); 1592 return; 1593 } 1594 } 1595 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1596 } 1597 1598 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && 1599 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1600 if (drv_tx_frames_pending(local)) { 1601 mod_timer(&local->dynamic_ps_timer, jiffies + 1602 msecs_to_jiffies( 1603 local->hw.conf.dynamic_ps_timeout)); 1604 } else { 1605 ieee80211_send_nullfunc(local, sdata, 1); 1606 /* Flush to get the tx status of nullfunc frame */ 1607 ieee80211_flush_queues(local, sdata, false); 1608 } 1609 } 1610 1611 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && 1612 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) || 1613 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1614 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1615 local->hw.conf.flags |= IEEE80211_CONF_PS; 1616 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1617 } 1618 } 1619 1620 void ieee80211_dynamic_ps_timer(unsigned long data) 1621 { 1622 struct ieee80211_local *local = (void *) data; 1623 1624 if (local->quiescing || local->suspended) 1625 return; 1626 1627 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1628 } 1629 1630 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1631 { 1632 struct delayed_work *delayed_work = 1633 container_of(work, struct delayed_work, work); 1634 struct ieee80211_sub_if_data *sdata = 1635 container_of(delayed_work, struct ieee80211_sub_if_data, 1636 dfs_cac_timer_work); 1637 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1638 1639 mutex_lock(&sdata->local->mtx); 1640 if (sdata->wdev.cac_started) { 1641 ieee80211_vif_release_channel(sdata); 1642 cfg80211_cac_event(sdata->dev, &chandef, 1643 NL80211_RADAR_CAC_FINISHED, 1644 GFP_KERNEL); 1645 } 1646 mutex_unlock(&sdata->local->mtx); 1647 } 1648 1649 static bool 1650 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1651 { 1652 struct ieee80211_local *local = sdata->local; 1653 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1654 bool ret = false; 1655 int ac; 1656 1657 if (local->hw.queues < IEEE80211_NUM_ACS) 1658 return false; 1659 1660 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1661 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1662 int non_acm_ac; 1663 unsigned long now = jiffies; 1664 1665 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1666 tx_tspec->admitted_time && 1667 time_after(now, tx_tspec->time_slice_start + HZ)) { 1668 tx_tspec->consumed_tx_time = 0; 1669 tx_tspec->time_slice_start = now; 1670 1671 if (tx_tspec->downgraded) 1672 tx_tspec->action = 1673 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1674 } 1675 1676 switch (tx_tspec->action) { 1677 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1678 /* take the original parameters */ 1679 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1680 sdata_err(sdata, 1681 "failed to set TX queue parameters for queue %d\n", 1682 ac); 1683 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1684 tx_tspec->downgraded = false; 1685 ret = true; 1686 break; 1687 case TX_TSPEC_ACTION_DOWNGRADE: 1688 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1689 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1690 ret = true; 1691 break; 1692 } 1693 /* downgrade next lower non-ACM AC */ 1694 for (non_acm_ac = ac + 1; 1695 non_acm_ac < IEEE80211_NUM_ACS; 1696 non_acm_ac++) 1697 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1698 break; 1699 /* The loop will result in using BK even if it requires 1700 * admission control, such configuration makes no sense 1701 * and we have to transmit somehow - the AC selection 1702 * does the same thing. 1703 */ 1704 if (drv_conf_tx(local, sdata, ac, 1705 &sdata->tx_conf[non_acm_ac])) 1706 sdata_err(sdata, 1707 "failed to set TX queue parameters for queue %d\n", 1708 ac); 1709 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1710 ret = true; 1711 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1712 tx_tspec->time_slice_start + HZ - now + 1); 1713 break; 1714 case TX_TSPEC_ACTION_NONE: 1715 /* nothing now */ 1716 break; 1717 } 1718 } 1719 1720 return ret; 1721 } 1722 1723 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1724 { 1725 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1726 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1727 } 1728 1729 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1730 { 1731 struct ieee80211_sub_if_data *sdata; 1732 1733 sdata = container_of(work, struct ieee80211_sub_if_data, 1734 u.mgd.tx_tspec_wk.work); 1735 ieee80211_sta_handle_tspec_ac_params(sdata); 1736 } 1737 1738 /* MLME */ 1739 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, 1740 struct ieee80211_sub_if_data *sdata, 1741 const u8 *wmm_param, size_t wmm_param_len) 1742 { 1743 struct ieee80211_tx_queue_params params; 1744 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1745 size_t left; 1746 int count; 1747 const u8 *pos; 1748 u8 uapsd_queues = 0; 1749 1750 if (!local->ops->conf_tx) 1751 return false; 1752 1753 if (local->hw.queues < IEEE80211_NUM_ACS) 1754 return false; 1755 1756 if (!wmm_param) 1757 return false; 1758 1759 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1760 return false; 1761 1762 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1763 uapsd_queues = ifmgd->uapsd_queues; 1764 1765 count = wmm_param[6] & 0x0f; 1766 if (count == ifmgd->wmm_last_param_set) 1767 return false; 1768 ifmgd->wmm_last_param_set = count; 1769 1770 pos = wmm_param + 8; 1771 left = wmm_param_len - 8; 1772 1773 memset(¶ms, 0, sizeof(params)); 1774 1775 sdata->wmm_acm = 0; 1776 for (; left >= 4; left -= 4, pos += 4) { 1777 int aci = (pos[0] >> 5) & 0x03; 1778 int acm = (pos[0] >> 4) & 0x01; 1779 bool uapsd = false; 1780 int queue; 1781 1782 switch (aci) { 1783 case 1: /* AC_BK */ 1784 queue = 3; 1785 if (acm) 1786 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1787 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1788 uapsd = true; 1789 break; 1790 case 2: /* AC_VI */ 1791 queue = 1; 1792 if (acm) 1793 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1794 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1795 uapsd = true; 1796 break; 1797 case 3: /* AC_VO */ 1798 queue = 0; 1799 if (acm) 1800 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1801 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1802 uapsd = true; 1803 break; 1804 case 0: /* AC_BE */ 1805 default: 1806 queue = 2; 1807 if (acm) 1808 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1809 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1810 uapsd = true; 1811 break; 1812 } 1813 1814 params.aifs = pos[0] & 0x0f; 1815 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1816 params.cw_min = ecw2cw(pos[1] & 0x0f); 1817 params.txop = get_unaligned_le16(pos + 2); 1818 params.acm = acm; 1819 params.uapsd = uapsd; 1820 1821 mlme_dbg(sdata, 1822 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 1823 queue, aci, acm, 1824 params.aifs, params.cw_min, params.cw_max, 1825 params.txop, params.uapsd, 1826 ifmgd->tx_tspec[queue].downgraded); 1827 sdata->tx_conf[queue] = params; 1828 if (!ifmgd->tx_tspec[queue].downgraded && 1829 drv_conf_tx(local, sdata, queue, ¶ms)) 1830 sdata_err(sdata, 1831 "failed to set TX queue parameters for queue %d\n", 1832 queue); 1833 } 1834 1835 /* enable WMM or activate new settings */ 1836 sdata->vif.bss_conf.qos = true; 1837 return true; 1838 } 1839 1840 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1841 { 1842 lockdep_assert_held(&sdata->local->mtx); 1843 1844 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 1845 ieee80211_run_deferred_scan(sdata->local); 1846 } 1847 1848 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1849 { 1850 mutex_lock(&sdata->local->mtx); 1851 __ieee80211_stop_poll(sdata); 1852 mutex_unlock(&sdata->local->mtx); 1853 } 1854 1855 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 1856 u16 capab, bool erp_valid, u8 erp) 1857 { 1858 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1859 u32 changed = 0; 1860 bool use_protection; 1861 bool use_short_preamble; 1862 bool use_short_slot; 1863 1864 if (erp_valid) { 1865 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 1866 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 1867 } else { 1868 use_protection = false; 1869 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 1870 } 1871 1872 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 1873 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ) 1874 use_short_slot = true; 1875 1876 if (use_protection != bss_conf->use_cts_prot) { 1877 bss_conf->use_cts_prot = use_protection; 1878 changed |= BSS_CHANGED_ERP_CTS_PROT; 1879 } 1880 1881 if (use_short_preamble != bss_conf->use_short_preamble) { 1882 bss_conf->use_short_preamble = use_short_preamble; 1883 changed |= BSS_CHANGED_ERP_PREAMBLE; 1884 } 1885 1886 if (use_short_slot != bss_conf->use_short_slot) { 1887 bss_conf->use_short_slot = use_short_slot; 1888 changed |= BSS_CHANGED_ERP_SLOT; 1889 } 1890 1891 return changed; 1892 } 1893 1894 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 1895 struct cfg80211_bss *cbss, 1896 u32 bss_info_changed) 1897 { 1898 struct ieee80211_bss *bss = (void *)cbss->priv; 1899 struct ieee80211_local *local = sdata->local; 1900 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1901 1902 bss_info_changed |= BSS_CHANGED_ASSOC; 1903 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 1904 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 1905 1906 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 1907 beacon_loss_count * bss_conf->beacon_int)); 1908 1909 sdata->u.mgd.associated = cbss; 1910 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 1911 1912 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 1913 1914 if (sdata->vif.p2p) { 1915 const struct cfg80211_bss_ies *ies; 1916 1917 rcu_read_lock(); 1918 ies = rcu_dereference(cbss->ies); 1919 if (ies) { 1920 int ret; 1921 1922 ret = cfg80211_get_p2p_attr( 1923 ies->data, ies->len, 1924 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 1925 (u8 *) &bss_conf->p2p_noa_attr, 1926 sizeof(bss_conf->p2p_noa_attr)); 1927 if (ret >= 2) { 1928 sdata->u.mgd.p2p_noa_index = 1929 bss_conf->p2p_noa_attr.index; 1930 bss_info_changed |= BSS_CHANGED_P2P_PS; 1931 } 1932 } 1933 rcu_read_unlock(); 1934 } 1935 1936 /* just to be sure */ 1937 ieee80211_stop_poll(sdata); 1938 1939 ieee80211_led_assoc(local, 1); 1940 1941 if (sdata->u.mgd.have_beacon) { 1942 /* 1943 * If the AP is buggy we may get here with no DTIM period 1944 * known, so assume it's 1 which is the only safe assumption 1945 * in that case, although if the TIM IE is broken powersave 1946 * probably just won't work at all. 1947 */ 1948 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 1949 bss_conf->beacon_rate = bss->beacon_rate; 1950 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 1951 } else { 1952 bss_conf->beacon_rate = NULL; 1953 bss_conf->dtim_period = 0; 1954 } 1955 1956 bss_conf->assoc = 1; 1957 1958 /* Tell the driver to monitor connection quality (if supported) */ 1959 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 1960 bss_conf->cqm_rssi_thold) 1961 bss_info_changed |= BSS_CHANGED_CQM; 1962 1963 /* Enable ARP filtering */ 1964 if (bss_conf->arp_addr_cnt) 1965 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 1966 1967 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 1968 1969 mutex_lock(&local->iflist_mtx); 1970 ieee80211_recalc_ps(local, -1); 1971 mutex_unlock(&local->iflist_mtx); 1972 1973 ieee80211_recalc_smps(sdata); 1974 ieee80211_recalc_ps_vif(sdata); 1975 1976 netif_carrier_on(sdata->dev); 1977 } 1978 1979 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 1980 u16 stype, u16 reason, bool tx, 1981 u8 *frame_buf) 1982 { 1983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1984 struct ieee80211_local *local = sdata->local; 1985 u32 changed = 0; 1986 1987 sdata_assert_lock(sdata); 1988 1989 if (WARN_ON_ONCE(tx && !frame_buf)) 1990 return; 1991 1992 if (WARN_ON(!ifmgd->associated)) 1993 return; 1994 1995 ieee80211_stop_poll(sdata); 1996 1997 ifmgd->associated = NULL; 1998 netif_carrier_off(sdata->dev); 1999 2000 /* 2001 * if we want to get out of ps before disassoc (why?) we have 2002 * to do it before sending disassoc, as otherwise the null-packet 2003 * won't be valid. 2004 */ 2005 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2006 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2007 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2008 } 2009 local->ps_sdata = NULL; 2010 2011 /* disable per-vif ps */ 2012 ieee80211_recalc_ps_vif(sdata); 2013 2014 /* make sure ongoing transmission finishes */ 2015 synchronize_net(); 2016 2017 /* 2018 * drop any frame before deauth/disassoc, this can be data or 2019 * management frame. Since we are disconnecting, we should not 2020 * insist sending these frames which can take time and delay 2021 * the disconnection and possible the roaming. 2022 */ 2023 if (tx) 2024 ieee80211_flush_queues(local, sdata, true); 2025 2026 /* deauthenticate/disassociate now */ 2027 if (tx || frame_buf) 2028 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2029 reason, tx, frame_buf); 2030 2031 /* flush out frame - make sure the deauth was actually sent */ 2032 if (tx) 2033 ieee80211_flush_queues(local, sdata, false); 2034 2035 /* clear bssid only after building the needed mgmt frames */ 2036 memset(ifmgd->bssid, 0, ETH_ALEN); 2037 2038 /* remove AP and TDLS peers */ 2039 sta_info_flush(sdata); 2040 2041 /* finally reset all BSS / config parameters */ 2042 changed |= ieee80211_reset_erp_info(sdata); 2043 2044 ieee80211_led_assoc(local, 0); 2045 changed |= BSS_CHANGED_ASSOC; 2046 sdata->vif.bss_conf.assoc = false; 2047 2048 ifmgd->p2p_noa_index = -1; 2049 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2050 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2051 2052 /* on the next assoc, re-program HT/VHT parameters */ 2053 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2054 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2055 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2056 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2057 2058 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2059 2060 del_timer_sync(&local->dynamic_ps_timer); 2061 cancel_work_sync(&local->dynamic_ps_enable_work); 2062 2063 /* Disable ARP filtering */ 2064 if (sdata->vif.bss_conf.arp_addr_cnt) 2065 changed |= BSS_CHANGED_ARP_FILTER; 2066 2067 sdata->vif.bss_conf.qos = false; 2068 changed |= BSS_CHANGED_QOS; 2069 2070 /* The BSSID (not really interesting) and HT changed */ 2071 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2072 ieee80211_bss_info_change_notify(sdata, changed); 2073 2074 /* disassociated - set to defaults now */ 2075 ieee80211_set_wmm_default(sdata, false); 2076 2077 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2078 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2079 del_timer_sync(&sdata->u.mgd.timer); 2080 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2081 2082 sdata->vif.bss_conf.dtim_period = 0; 2083 sdata->vif.bss_conf.beacon_rate = NULL; 2084 2085 ifmgd->have_beacon = false; 2086 2087 ifmgd->flags = 0; 2088 mutex_lock(&local->mtx); 2089 ieee80211_vif_release_channel(sdata); 2090 2091 sdata->vif.csa_active = false; 2092 ifmgd->csa_waiting_bcn = false; 2093 if (sdata->csa_block_tx) { 2094 ieee80211_wake_vif_queues(local, sdata, 2095 IEEE80211_QUEUE_STOP_REASON_CSA); 2096 sdata->csa_block_tx = false; 2097 } 2098 mutex_unlock(&local->mtx); 2099 2100 /* existing TX TSPEC sessions no longer exist */ 2101 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2102 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2103 2104 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2105 } 2106 2107 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2108 struct ieee80211_hdr *hdr) 2109 { 2110 /* 2111 * We can postpone the mgd.timer whenever receiving unicast frames 2112 * from AP because we know that the connection is working both ways 2113 * at that time. But multicast frames (and hence also beacons) must 2114 * be ignored here, because we need to trigger the timer during 2115 * data idle periods for sending the periodic probe request to the 2116 * AP we're connected to. 2117 */ 2118 if (is_multicast_ether_addr(hdr->addr1)) 2119 return; 2120 2121 ieee80211_sta_reset_conn_monitor(sdata); 2122 } 2123 2124 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2125 { 2126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2127 struct ieee80211_local *local = sdata->local; 2128 2129 mutex_lock(&local->mtx); 2130 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2131 goto out; 2132 2133 __ieee80211_stop_poll(sdata); 2134 2135 mutex_lock(&local->iflist_mtx); 2136 ieee80211_recalc_ps(local, -1); 2137 mutex_unlock(&local->iflist_mtx); 2138 2139 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 2140 goto out; 2141 2142 /* 2143 * We've received a probe response, but are not sure whether 2144 * we have or will be receiving any beacons or data, so let's 2145 * schedule the timers again, just in case. 2146 */ 2147 ieee80211_sta_reset_beacon_monitor(sdata); 2148 2149 mod_timer(&ifmgd->conn_mon_timer, 2150 round_jiffies_up(jiffies + 2151 IEEE80211_CONNECTION_IDLE_TIME)); 2152 out: 2153 mutex_unlock(&local->mtx); 2154 } 2155 2156 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2157 struct ieee80211_hdr *hdr, 2158 u16 tx_time) 2159 { 2160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2161 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; 2162 int ac = ieee80211_ac_from_tid(tid); 2163 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2164 unsigned long now = jiffies; 2165 2166 if (likely(!tx_tspec->admitted_time)) 2167 return; 2168 2169 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2170 tx_tspec->consumed_tx_time = 0; 2171 tx_tspec->time_slice_start = now; 2172 2173 if (tx_tspec->downgraded) { 2174 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2175 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2176 } 2177 } 2178 2179 if (tx_tspec->downgraded) 2180 return; 2181 2182 tx_tspec->consumed_tx_time += tx_time; 2183 2184 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2185 tx_tspec->downgraded = true; 2186 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2187 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2188 } 2189 } 2190 2191 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2192 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2193 { 2194 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2195 2196 if (!ieee80211_is_data(hdr->frame_control)) 2197 return; 2198 2199 if (ieee80211_is_nullfunc(hdr->frame_control) && 2200 sdata->u.mgd.probe_send_count > 0) { 2201 if (ack) 2202 ieee80211_sta_reset_conn_monitor(sdata); 2203 else 2204 sdata->u.mgd.nullfunc_failed = true; 2205 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2206 return; 2207 } 2208 2209 if (ack) 2210 ieee80211_sta_reset_conn_monitor(sdata); 2211 } 2212 2213 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2214 { 2215 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2216 const u8 *ssid; 2217 u8 *dst = ifmgd->associated->bssid; 2218 u8 unicast_limit = max(1, max_probe_tries - 3); 2219 2220 /* 2221 * Try sending broadcast probe requests for the last three 2222 * probe requests after the first ones failed since some 2223 * buggy APs only support broadcast probe requests. 2224 */ 2225 if (ifmgd->probe_send_count >= unicast_limit) 2226 dst = NULL; 2227 2228 /* 2229 * When the hardware reports an accurate Tx ACK status, it's 2230 * better to send a nullfunc frame instead of a probe request, 2231 * as it will kick us off the AP quickly if we aren't associated 2232 * anymore. The timeout will be reset if the frame is ACKed by 2233 * the AP. 2234 */ 2235 ifmgd->probe_send_count++; 2236 2237 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { 2238 ifmgd->nullfunc_failed = false; 2239 ieee80211_send_nullfunc(sdata->local, sdata, 0); 2240 } else { 2241 int ssid_len; 2242 2243 rcu_read_lock(); 2244 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2245 if (WARN_ON_ONCE(ssid == NULL)) 2246 ssid_len = 0; 2247 else 2248 ssid_len = ssid[1]; 2249 2250 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL, 2251 ssid + 2, ssid_len, NULL, 2252 0, (u32) -1, true, 0, 2253 ifmgd->associated->channel, false); 2254 rcu_read_unlock(); 2255 } 2256 2257 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2258 run_again(sdata, ifmgd->probe_timeout); 2259 } 2260 2261 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2262 bool beacon) 2263 { 2264 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2265 bool already = false; 2266 2267 if (!ieee80211_sdata_running(sdata)) 2268 return; 2269 2270 sdata_lock(sdata); 2271 2272 if (!ifmgd->associated) 2273 goto out; 2274 2275 mutex_lock(&sdata->local->mtx); 2276 2277 if (sdata->local->tmp_channel || sdata->local->scanning) { 2278 mutex_unlock(&sdata->local->mtx); 2279 goto out; 2280 } 2281 2282 if (beacon) { 2283 mlme_dbg_ratelimited(sdata, 2284 "detected beacon loss from AP (missed %d beacons) - probing\n", 2285 beacon_loss_count); 2286 2287 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2288 } 2289 2290 /* 2291 * The driver/our work has already reported this event or the 2292 * connection monitoring has kicked in and we have already sent 2293 * a probe request. Or maybe the AP died and the driver keeps 2294 * reporting until we disassociate... 2295 * 2296 * In either case we have to ignore the current call to this 2297 * function (except for setting the correct probe reason bit) 2298 * because otherwise we would reset the timer every time and 2299 * never check whether we received a probe response! 2300 */ 2301 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2302 already = true; 2303 2304 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2305 2306 mutex_unlock(&sdata->local->mtx); 2307 2308 if (already) 2309 goto out; 2310 2311 mutex_lock(&sdata->local->iflist_mtx); 2312 ieee80211_recalc_ps(sdata->local, -1); 2313 mutex_unlock(&sdata->local->iflist_mtx); 2314 2315 ifmgd->probe_send_count = 0; 2316 ieee80211_mgd_probe_ap_send(sdata); 2317 out: 2318 sdata_unlock(sdata); 2319 } 2320 2321 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2322 struct ieee80211_vif *vif) 2323 { 2324 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2325 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2326 struct cfg80211_bss *cbss; 2327 struct sk_buff *skb; 2328 const u8 *ssid; 2329 int ssid_len; 2330 2331 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2332 return NULL; 2333 2334 sdata_assert_lock(sdata); 2335 2336 if (ifmgd->associated) 2337 cbss = ifmgd->associated; 2338 else if (ifmgd->auth_data) 2339 cbss = ifmgd->auth_data->bss; 2340 else if (ifmgd->assoc_data) 2341 cbss = ifmgd->assoc_data->bss; 2342 else 2343 return NULL; 2344 2345 rcu_read_lock(); 2346 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2347 if (WARN_ON_ONCE(ssid == NULL)) 2348 ssid_len = 0; 2349 else 2350 ssid_len = ssid[1]; 2351 2352 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2353 (u32) -1, cbss->channel, 2354 ssid + 2, ssid_len, 2355 NULL, 0, true); 2356 rcu_read_unlock(); 2357 2358 return skb; 2359 } 2360 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2361 2362 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2363 { 2364 struct ieee80211_local *local = sdata->local; 2365 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2366 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2367 2368 sdata_lock(sdata); 2369 if (!ifmgd->associated) { 2370 sdata_unlock(sdata); 2371 return; 2372 } 2373 2374 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2375 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2376 true, frame_buf); 2377 mutex_lock(&local->mtx); 2378 sdata->vif.csa_active = false; 2379 ifmgd->csa_waiting_bcn = false; 2380 if (sdata->csa_block_tx) { 2381 ieee80211_wake_vif_queues(local, sdata, 2382 IEEE80211_QUEUE_STOP_REASON_CSA); 2383 sdata->csa_block_tx = false; 2384 } 2385 mutex_unlock(&local->mtx); 2386 2387 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 2388 IEEE80211_DEAUTH_FRAME_LEN); 2389 sdata_unlock(sdata); 2390 } 2391 2392 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2393 { 2394 struct ieee80211_sub_if_data *sdata = 2395 container_of(work, struct ieee80211_sub_if_data, 2396 u.mgd.beacon_connection_loss_work); 2397 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2398 struct sta_info *sta; 2399 2400 if (ifmgd->associated) { 2401 rcu_read_lock(); 2402 sta = sta_info_get(sdata, ifmgd->bssid); 2403 if (sta) 2404 sta->beacon_loss_count++; 2405 rcu_read_unlock(); 2406 } 2407 2408 if (ifmgd->connection_loss) { 2409 sdata_info(sdata, "Connection to AP %pM lost\n", 2410 ifmgd->bssid); 2411 __ieee80211_disconnect(sdata); 2412 } else { 2413 ieee80211_mgd_probe_ap(sdata, true); 2414 } 2415 } 2416 2417 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2418 { 2419 struct ieee80211_sub_if_data *sdata = 2420 container_of(work, struct ieee80211_sub_if_data, 2421 u.mgd.csa_connection_drop_work); 2422 2423 __ieee80211_disconnect(sdata); 2424 } 2425 2426 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2427 { 2428 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2429 struct ieee80211_hw *hw = &sdata->local->hw; 2430 2431 trace_api_beacon_loss(sdata); 2432 2433 sdata->u.mgd.connection_loss = false; 2434 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2435 } 2436 EXPORT_SYMBOL(ieee80211_beacon_loss); 2437 2438 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2439 { 2440 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2441 struct ieee80211_hw *hw = &sdata->local->hw; 2442 2443 trace_api_connection_loss(sdata); 2444 2445 sdata->u.mgd.connection_loss = true; 2446 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2447 } 2448 EXPORT_SYMBOL(ieee80211_connection_loss); 2449 2450 2451 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2452 bool assoc) 2453 { 2454 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2455 2456 sdata_assert_lock(sdata); 2457 2458 if (!assoc) { 2459 /* 2460 * we are not authenticated yet, the only timer that could be 2461 * running is the timeout for the authentication response which 2462 * which is not relevant anymore. 2463 */ 2464 del_timer_sync(&sdata->u.mgd.timer); 2465 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2466 2467 memset(sdata->u.mgd.bssid, 0, ETH_ALEN); 2468 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2469 sdata->u.mgd.flags = 0; 2470 mutex_lock(&sdata->local->mtx); 2471 ieee80211_vif_release_channel(sdata); 2472 mutex_unlock(&sdata->local->mtx); 2473 } 2474 2475 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2476 kfree(auth_data); 2477 sdata->u.mgd.auth_data = NULL; 2478 } 2479 2480 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2481 struct ieee80211_mgmt *mgmt, size_t len) 2482 { 2483 struct ieee80211_local *local = sdata->local; 2484 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2485 u8 *pos; 2486 struct ieee802_11_elems elems; 2487 u32 tx_flags = 0; 2488 2489 pos = mgmt->u.auth.variable; 2490 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2491 if (!elems.challenge) 2492 return; 2493 auth_data->expected_transaction = 4; 2494 drv_mgd_prepare_tx(sdata->local, sdata); 2495 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 2496 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2497 IEEE80211_TX_INTFL_MLME_CONN_TX; 2498 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2499 elems.challenge - 2, elems.challenge_len + 2, 2500 auth_data->bss->bssid, auth_data->bss->bssid, 2501 auth_data->key, auth_data->key_len, 2502 auth_data->key_idx, tx_flags); 2503 } 2504 2505 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2506 struct ieee80211_mgmt *mgmt, size_t len) 2507 { 2508 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2509 u8 bssid[ETH_ALEN]; 2510 u16 auth_alg, auth_transaction, status_code; 2511 struct sta_info *sta; 2512 2513 sdata_assert_lock(sdata); 2514 2515 if (len < 24 + 6) 2516 return; 2517 2518 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2519 return; 2520 2521 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2522 2523 if (!ether_addr_equal(bssid, mgmt->bssid)) 2524 return; 2525 2526 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2527 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2528 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2529 2530 if (auth_alg != ifmgd->auth_data->algorithm || 2531 auth_transaction != ifmgd->auth_data->expected_transaction) { 2532 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2533 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2534 auth_transaction, 2535 ifmgd->auth_data->expected_transaction); 2536 return; 2537 } 2538 2539 if (status_code != WLAN_STATUS_SUCCESS) { 2540 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2541 mgmt->sa, status_code); 2542 ieee80211_destroy_auth_data(sdata, false); 2543 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2544 return; 2545 } 2546 2547 switch (ifmgd->auth_data->algorithm) { 2548 case WLAN_AUTH_OPEN: 2549 case WLAN_AUTH_LEAP: 2550 case WLAN_AUTH_FT: 2551 case WLAN_AUTH_SAE: 2552 break; 2553 case WLAN_AUTH_SHARED_KEY: 2554 if (ifmgd->auth_data->expected_transaction != 4) { 2555 ieee80211_auth_challenge(sdata, mgmt, len); 2556 /* need another frame */ 2557 return; 2558 } 2559 break; 2560 default: 2561 WARN_ONCE(1, "invalid auth alg %d", 2562 ifmgd->auth_data->algorithm); 2563 return; 2564 } 2565 2566 sdata_info(sdata, "authenticated\n"); 2567 ifmgd->auth_data->done = true; 2568 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2569 ifmgd->auth_data->timeout_started = true; 2570 run_again(sdata, ifmgd->auth_data->timeout); 2571 2572 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2573 ifmgd->auth_data->expected_transaction != 2) { 2574 /* 2575 * Report auth frame to user space for processing since another 2576 * round of Authentication frames is still needed. 2577 */ 2578 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2579 return; 2580 } 2581 2582 /* move station state to auth */ 2583 mutex_lock(&sdata->local->sta_mtx); 2584 sta = sta_info_get(sdata, bssid); 2585 if (!sta) { 2586 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2587 goto out_err; 2588 } 2589 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2590 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2591 goto out_err; 2592 } 2593 mutex_unlock(&sdata->local->sta_mtx); 2594 2595 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2596 return; 2597 out_err: 2598 mutex_unlock(&sdata->local->sta_mtx); 2599 /* ignore frame -- wait for timeout */ 2600 } 2601 2602 #define case_WLAN(type) \ 2603 case WLAN_REASON_##type: return #type 2604 2605 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2606 { 2607 switch (reason_code) { 2608 case_WLAN(UNSPECIFIED); 2609 case_WLAN(PREV_AUTH_NOT_VALID); 2610 case_WLAN(DEAUTH_LEAVING); 2611 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2612 case_WLAN(DISASSOC_AP_BUSY); 2613 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2614 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2615 case_WLAN(DISASSOC_STA_HAS_LEFT); 2616 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2617 case_WLAN(DISASSOC_BAD_POWER); 2618 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2619 case_WLAN(INVALID_IE); 2620 case_WLAN(MIC_FAILURE); 2621 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2622 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2623 case_WLAN(IE_DIFFERENT); 2624 case_WLAN(INVALID_GROUP_CIPHER); 2625 case_WLAN(INVALID_PAIRWISE_CIPHER); 2626 case_WLAN(INVALID_AKMP); 2627 case_WLAN(UNSUPP_RSN_VERSION); 2628 case_WLAN(INVALID_RSN_IE_CAP); 2629 case_WLAN(IEEE8021X_FAILED); 2630 case_WLAN(CIPHER_SUITE_REJECTED); 2631 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2632 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2633 case_WLAN(DISASSOC_LOW_ACK); 2634 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2635 case_WLAN(QSTA_LEAVE_QBSS); 2636 case_WLAN(QSTA_NOT_USE); 2637 case_WLAN(QSTA_REQUIRE_SETUP); 2638 case_WLAN(QSTA_TIMEOUT); 2639 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2640 case_WLAN(MESH_PEER_CANCELED); 2641 case_WLAN(MESH_MAX_PEERS); 2642 case_WLAN(MESH_CONFIG); 2643 case_WLAN(MESH_CLOSE); 2644 case_WLAN(MESH_MAX_RETRIES); 2645 case_WLAN(MESH_CONFIRM_TIMEOUT); 2646 case_WLAN(MESH_INVALID_GTK); 2647 case_WLAN(MESH_INCONSISTENT_PARAM); 2648 case_WLAN(MESH_INVALID_SECURITY); 2649 case_WLAN(MESH_PATH_ERROR); 2650 case_WLAN(MESH_PATH_NOFORWARD); 2651 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2652 case_WLAN(MAC_EXISTS_IN_MBSS); 2653 case_WLAN(MESH_CHAN_REGULATORY); 2654 case_WLAN(MESH_CHAN); 2655 default: return "<unknown>"; 2656 } 2657 } 2658 2659 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2660 struct ieee80211_mgmt *mgmt, size_t len) 2661 { 2662 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2663 const u8 *bssid = NULL; 2664 u16 reason_code; 2665 2666 sdata_assert_lock(sdata); 2667 2668 if (len < 24 + 2) 2669 return; 2670 2671 if (!ifmgd->associated || 2672 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2673 return; 2674 2675 bssid = ifmgd->associated->bssid; 2676 2677 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2678 2679 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2680 bssid, reason_code, ieee80211_get_reason_code_string(reason_code)); 2681 2682 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2683 2684 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2685 } 2686 2687 2688 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2689 struct ieee80211_mgmt *mgmt, size_t len) 2690 { 2691 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2692 u16 reason_code; 2693 2694 sdata_assert_lock(sdata); 2695 2696 if (len < 24 + 2) 2697 return; 2698 2699 if (!ifmgd->associated || 2700 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2701 return; 2702 2703 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2704 2705 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n", 2706 mgmt->sa, reason_code); 2707 2708 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2709 2710 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2711 } 2712 2713 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 2714 u8 *supp_rates, unsigned int supp_rates_len, 2715 u32 *rates, u32 *basic_rates, 2716 bool *have_higher_than_11mbit, 2717 int *min_rate, int *min_rate_index, 2718 int shift, u32 rate_flags) 2719 { 2720 int i, j; 2721 2722 for (i = 0; i < supp_rates_len; i++) { 2723 int rate = supp_rates[i] & 0x7f; 2724 bool is_basic = !!(supp_rates[i] & 0x80); 2725 2726 if ((rate * 5 * (1 << shift)) > 110) 2727 *have_higher_than_11mbit = true; 2728 2729 /* 2730 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009 2731 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it. 2732 * 2733 * Note: Even through the membership selector and the basic 2734 * rate flag share the same bit, they are not exactly 2735 * the same. 2736 */ 2737 if (!!(supp_rates[i] & 0x80) && 2738 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 2739 continue; 2740 2741 for (j = 0; j < sband->n_bitrates; j++) { 2742 struct ieee80211_rate *br; 2743 int brate; 2744 2745 br = &sband->bitrates[j]; 2746 if ((rate_flags & br->flags) != rate_flags) 2747 continue; 2748 2749 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2750 if (brate == rate) { 2751 *rates |= BIT(j); 2752 if (is_basic) 2753 *basic_rates |= BIT(j); 2754 if ((rate * 5) < *min_rate) { 2755 *min_rate = rate * 5; 2756 *min_rate_index = j; 2757 } 2758 break; 2759 } 2760 } 2761 } 2762 } 2763 2764 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2765 bool assoc) 2766 { 2767 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2768 2769 sdata_assert_lock(sdata); 2770 2771 if (!assoc) { 2772 /* 2773 * we are not associated yet, the only timer that could be 2774 * running is the timeout for the association response which 2775 * which is not relevant anymore. 2776 */ 2777 del_timer_sync(&sdata->u.mgd.timer); 2778 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2779 2780 memset(sdata->u.mgd.bssid, 0, ETH_ALEN); 2781 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2782 sdata->u.mgd.flags = 0; 2783 mutex_lock(&sdata->local->mtx); 2784 ieee80211_vif_release_channel(sdata); 2785 mutex_unlock(&sdata->local->mtx); 2786 } 2787 2788 kfree(assoc_data); 2789 sdata->u.mgd.assoc_data = NULL; 2790 } 2791 2792 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 2793 struct cfg80211_bss *cbss, 2794 struct ieee80211_mgmt *mgmt, size_t len) 2795 { 2796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2797 struct ieee80211_local *local = sdata->local; 2798 struct ieee80211_supported_band *sband; 2799 struct sta_info *sta; 2800 u8 *pos; 2801 u16 capab_info, aid; 2802 struct ieee802_11_elems elems; 2803 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2804 const struct cfg80211_bss_ies *bss_ies = NULL; 2805 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2806 u32 changed = 0; 2807 int err; 2808 bool ret; 2809 2810 /* AssocResp and ReassocResp have identical structure */ 2811 2812 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2813 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2814 2815 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) 2816 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", 2817 aid); 2818 aid &= ~(BIT(15) | BIT(14)); 2819 2820 ifmgd->broken_ap = false; 2821 2822 if (aid == 0 || aid > IEEE80211_MAX_AID) { 2823 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 2824 aid); 2825 aid = 0; 2826 ifmgd->broken_ap = true; 2827 } 2828 2829 pos = mgmt->u.assoc_resp.variable; 2830 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2831 2832 if (!elems.supp_rates) { 2833 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 2834 return false; 2835 } 2836 2837 ifmgd->aid = aid; 2838 ifmgd->tdls_chan_switch_prohibited = 2839 elems.ext_capab && elems.ext_capab_len >= 5 && 2840 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 2841 2842 /* 2843 * Some APs are erroneously not including some information in their 2844 * (re)association response frames. Try to recover by using the data 2845 * from the beacon or probe response. This seems to afflict mobile 2846 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 2847 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 2848 */ 2849 if ((assoc_data->wmm && !elems.wmm_param) || 2850 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2851 (!elems.ht_cap_elem || !elems.ht_operation)) || 2852 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2853 (!elems.vht_cap_elem || !elems.vht_operation))) { 2854 const struct cfg80211_bss_ies *ies; 2855 struct ieee802_11_elems bss_elems; 2856 2857 rcu_read_lock(); 2858 ies = rcu_dereference(cbss->ies); 2859 if (ies) 2860 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 2861 GFP_ATOMIC); 2862 rcu_read_unlock(); 2863 if (!bss_ies) 2864 return false; 2865 2866 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 2867 false, &bss_elems); 2868 if (assoc_data->wmm && 2869 !elems.wmm_param && bss_elems.wmm_param) { 2870 elems.wmm_param = bss_elems.wmm_param; 2871 sdata_info(sdata, 2872 "AP bug: WMM param missing from AssocResp\n"); 2873 } 2874 2875 /* 2876 * Also check if we requested HT/VHT, otherwise the AP doesn't 2877 * have to include the IEs in the (re)association response. 2878 */ 2879 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 2880 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2881 elems.ht_cap_elem = bss_elems.ht_cap_elem; 2882 sdata_info(sdata, 2883 "AP bug: HT capability missing from AssocResp\n"); 2884 } 2885 if (!elems.ht_operation && bss_elems.ht_operation && 2886 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2887 elems.ht_operation = bss_elems.ht_operation; 2888 sdata_info(sdata, 2889 "AP bug: HT operation missing from AssocResp\n"); 2890 } 2891 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 2892 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2893 elems.vht_cap_elem = bss_elems.vht_cap_elem; 2894 sdata_info(sdata, 2895 "AP bug: VHT capa missing from AssocResp\n"); 2896 } 2897 if (!elems.vht_operation && bss_elems.vht_operation && 2898 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2899 elems.vht_operation = bss_elems.vht_operation; 2900 sdata_info(sdata, 2901 "AP bug: VHT operation missing from AssocResp\n"); 2902 } 2903 } 2904 2905 /* 2906 * We previously checked these in the beacon/probe response, so 2907 * they should be present here. This is just a safety net. 2908 */ 2909 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2910 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 2911 sdata_info(sdata, 2912 "HT AP is missing WMM params or HT capability/operation\n"); 2913 ret = false; 2914 goto out; 2915 } 2916 2917 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2918 (!elems.vht_cap_elem || !elems.vht_operation)) { 2919 sdata_info(sdata, 2920 "VHT AP is missing VHT capability/operation\n"); 2921 ret = false; 2922 goto out; 2923 } 2924 2925 mutex_lock(&sdata->local->sta_mtx); 2926 /* 2927 * station info was already allocated and inserted before 2928 * the association and should be available to us 2929 */ 2930 sta = sta_info_get(sdata, cbss->bssid); 2931 if (WARN_ON(!sta)) { 2932 mutex_unlock(&sdata->local->sta_mtx); 2933 ret = false; 2934 goto out; 2935 } 2936 2937 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; 2938 2939 /* Set up internal HT/VHT capabilities */ 2940 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 2941 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 2942 elems.ht_cap_elem, sta); 2943 2944 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 2945 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 2946 elems.vht_cap_elem, sta); 2947 2948 /* 2949 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 2950 * in their association response, so ignore that data for our own 2951 * configuration. If it changed since the last beacon, we'll get the 2952 * next beacon and update then. 2953 */ 2954 2955 /* 2956 * If an operating mode notification IE is present, override the 2957 * NSS calculation (that would be done in rate_control_rate_init()) 2958 * and use the # of streams from that element. 2959 */ 2960 if (elems.opmode_notif && 2961 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 2962 u8 nss; 2963 2964 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 2965 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 2966 nss += 1; 2967 sta->sta.rx_nss = nss; 2968 } 2969 2970 rate_control_rate_init(sta); 2971 2972 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) 2973 set_sta_flag(sta, WLAN_STA_MFP); 2974 2975 sta->sta.wme = elems.wmm_param; 2976 2977 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 2978 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 2979 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 2980 if (err) { 2981 sdata_info(sdata, 2982 "failed to move station %pM to desired state\n", 2983 sta->sta.addr); 2984 WARN_ON(__sta_info_destroy(sta)); 2985 mutex_unlock(&sdata->local->sta_mtx); 2986 ret = false; 2987 goto out; 2988 } 2989 2990 mutex_unlock(&sdata->local->sta_mtx); 2991 2992 /* 2993 * Always handle WMM once after association regardless 2994 * of the first value the AP uses. Setting -1 here has 2995 * that effect because the AP values is an unsigned 2996 * 4-bit value. 2997 */ 2998 ifmgd->wmm_last_param_set = -1; 2999 3000 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param) 3001 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3002 elems.wmm_param_len); 3003 else 3004 ieee80211_set_wmm_default(sdata, false); 3005 changed |= BSS_CHANGED_QOS; 3006 3007 /* set AID and assoc capability, 3008 * ieee80211_set_associated() will tell the driver */ 3009 bss_conf->aid = aid; 3010 bss_conf->assoc_capability = capab_info; 3011 ieee80211_set_associated(sdata, cbss, changed); 3012 3013 /* 3014 * If we're using 4-addr mode, let the AP know that we're 3015 * doing so, so that it can create the STA VLAN on its side 3016 */ 3017 if (ifmgd->use_4addr) 3018 ieee80211_send_4addr_nullfunc(local, sdata); 3019 3020 /* 3021 * Start timer to probe the connection to the AP now. 3022 * Also start the timer that will detect beacon loss. 3023 */ 3024 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3025 ieee80211_sta_reset_beacon_monitor(sdata); 3026 3027 ret = true; 3028 out: 3029 kfree(bss_ies); 3030 return ret; 3031 } 3032 3033 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3034 struct ieee80211_mgmt *mgmt, 3035 size_t len) 3036 { 3037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3038 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3039 u16 capab_info, status_code, aid; 3040 struct ieee802_11_elems elems; 3041 int ac, uapsd_queues = -1; 3042 u8 *pos; 3043 bool reassoc; 3044 struct cfg80211_bss *bss; 3045 3046 sdata_assert_lock(sdata); 3047 3048 if (!assoc_data) 3049 return; 3050 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3051 return; 3052 3053 /* 3054 * AssocResp and ReassocResp have identical structure, so process both 3055 * of them in this function. 3056 */ 3057 3058 if (len < 24 + 6) 3059 return; 3060 3061 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); 3062 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3063 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3064 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3065 3066 sdata_info(sdata, 3067 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3068 reassoc ? "Rea" : "A", mgmt->sa, 3069 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3070 3071 pos = mgmt->u.assoc_resp.variable; 3072 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3073 3074 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3075 elems.timeout_int && 3076 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3077 u32 tu, ms; 3078 tu = le32_to_cpu(elems.timeout_int->value); 3079 ms = tu * 1024 / 1000; 3080 sdata_info(sdata, 3081 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3082 mgmt->sa, tu, ms); 3083 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3084 assoc_data->timeout_started = true; 3085 if (ms > IEEE80211_ASSOC_TIMEOUT) 3086 run_again(sdata, assoc_data->timeout); 3087 return; 3088 } 3089 3090 bss = assoc_data->bss; 3091 3092 if (status_code != WLAN_STATUS_SUCCESS) { 3093 sdata_info(sdata, "%pM denied association (code=%d)\n", 3094 mgmt->sa, status_code); 3095 ieee80211_destroy_assoc_data(sdata, false); 3096 } else { 3097 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3098 /* oops -- internal error -- send timeout for now */ 3099 ieee80211_destroy_assoc_data(sdata, false); 3100 cfg80211_assoc_timeout(sdata->dev, bss); 3101 return; 3102 } 3103 sdata_info(sdata, "associated\n"); 3104 3105 /* 3106 * destroy assoc_data afterwards, as otherwise an idle 3107 * recalc after assoc_data is NULL but before associated 3108 * is set can cause the interface to go idle 3109 */ 3110 ieee80211_destroy_assoc_data(sdata, true); 3111 3112 /* get uapsd queues configuration */ 3113 uapsd_queues = 0; 3114 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3115 if (sdata->tx_conf[ac].uapsd) 3116 uapsd_queues |= BIT(ac); 3117 } 3118 3119 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 3120 } 3121 3122 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3123 struct ieee80211_mgmt *mgmt, size_t len, 3124 struct ieee80211_rx_status *rx_status, 3125 struct ieee802_11_elems *elems) 3126 { 3127 struct ieee80211_local *local = sdata->local; 3128 struct ieee80211_bss *bss; 3129 struct ieee80211_channel *channel; 3130 3131 sdata_assert_lock(sdata); 3132 3133 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3134 if (!channel) 3135 return; 3136 3137 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 3138 channel); 3139 if (bss) { 3140 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3141 ieee80211_rx_bss_put(local, bss); 3142 } 3143 } 3144 3145 3146 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3147 struct sk_buff *skb) 3148 { 3149 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3150 struct ieee80211_if_managed *ifmgd; 3151 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3152 size_t baselen, len = skb->len; 3153 struct ieee802_11_elems elems; 3154 3155 ifmgd = &sdata->u.mgd; 3156 3157 sdata_assert_lock(sdata); 3158 3159 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3160 return; /* ignore ProbeResp to foreign address */ 3161 3162 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3163 if (baselen > len) 3164 return; 3165 3166 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 3167 false, &elems); 3168 3169 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3170 3171 if (ifmgd->associated && 3172 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3173 ieee80211_reset_ap_probe(sdata); 3174 3175 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies && 3176 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) { 3177 /* got probe response, continue with auth */ 3178 sdata_info(sdata, "direct probe responded\n"); 3179 ifmgd->auth_data->tries = 0; 3180 ifmgd->auth_data->timeout = jiffies; 3181 ifmgd->auth_data->timeout_started = true; 3182 run_again(sdata, ifmgd->auth_data->timeout); 3183 } 3184 } 3185 3186 /* 3187 * This is the canonical list of information elements we care about, 3188 * the filter code also gives us all changes to the Microsoft OUI 3189 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3190 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3191 * changes to requested client power. 3192 * 3193 * We implement beacon filtering in software since that means we can 3194 * avoid processing the frame here and in cfg80211, and userspace 3195 * will not be able to tell whether the hardware supports it or not. 3196 * 3197 * XXX: This list needs to be dynamic -- userspace needs to be able to 3198 * add items it requires. It also needs to be able to tell us to 3199 * look out for other vendor IEs. 3200 */ 3201 static const u64 care_about_ies = 3202 (1ULL << WLAN_EID_COUNTRY) | 3203 (1ULL << WLAN_EID_ERP_INFO) | 3204 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3205 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3206 (1ULL << WLAN_EID_HT_CAPABILITY) | 3207 (1ULL << WLAN_EID_HT_OPERATION); 3208 3209 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3210 struct ieee80211_mgmt *mgmt, size_t len, 3211 struct ieee80211_rx_status *rx_status) 3212 { 3213 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3214 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3215 size_t baselen; 3216 struct ieee802_11_elems elems; 3217 struct ieee80211_local *local = sdata->local; 3218 struct ieee80211_chanctx_conf *chanctx_conf; 3219 struct ieee80211_channel *chan; 3220 struct sta_info *sta; 3221 u32 changed = 0; 3222 bool erp_valid; 3223 u8 erp_value = 0; 3224 u32 ncrc; 3225 u8 *bssid; 3226 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3227 3228 sdata_assert_lock(sdata); 3229 3230 /* Process beacon from the current BSS */ 3231 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3232 if (baselen > len) 3233 return; 3234 3235 rcu_read_lock(); 3236 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3237 if (!chanctx_conf) { 3238 rcu_read_unlock(); 3239 return; 3240 } 3241 3242 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3243 rcu_read_unlock(); 3244 return; 3245 } 3246 chan = chanctx_conf->def.chan; 3247 rcu_read_unlock(); 3248 3249 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3250 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3251 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3252 len - baselen, false, &elems); 3253 3254 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3255 if (elems.tim && !elems.parse_error) { 3256 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3257 ifmgd->dtim_period = tim_ie->dtim_period; 3258 } 3259 ifmgd->have_beacon = true; 3260 ifmgd->assoc_data->need_beacon = false; 3261 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { 3262 sdata->vif.bss_conf.sync_tsf = 3263 le64_to_cpu(mgmt->u.beacon.timestamp); 3264 sdata->vif.bss_conf.sync_device_ts = 3265 rx_status->device_timestamp; 3266 if (elems.tim) 3267 sdata->vif.bss_conf.sync_dtim_count = 3268 elems.tim->dtim_count; 3269 else 3270 sdata->vif.bss_conf.sync_dtim_count = 0; 3271 } 3272 /* continue assoc process */ 3273 ifmgd->assoc_data->timeout = jiffies; 3274 ifmgd->assoc_data->timeout_started = true; 3275 run_again(sdata, ifmgd->assoc_data->timeout); 3276 return; 3277 } 3278 3279 if (!ifmgd->associated || 3280 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3281 return; 3282 bssid = ifmgd->associated->bssid; 3283 3284 /* Track average RSSI from the Beacon frames of the current AP */ 3285 ifmgd->last_beacon_signal = rx_status->signal; 3286 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3287 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3288 ifmgd->ave_beacon_signal = rx_status->signal * 16; 3289 ifmgd->last_cqm_event_signal = 0; 3290 ifmgd->count_beacon_signal = 1; 3291 ifmgd->last_ave_beacon_signal = 0; 3292 } else { 3293 ifmgd->ave_beacon_signal = 3294 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 + 3295 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) * 3296 ifmgd->ave_beacon_signal) / 16; 3297 ifmgd->count_beacon_signal++; 3298 } 3299 3300 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3301 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3302 int sig = ifmgd->ave_beacon_signal; 3303 int last_sig = ifmgd->last_ave_beacon_signal; 3304 3305 /* 3306 * if signal crosses either of the boundaries, invoke callback 3307 * with appropriate parameters 3308 */ 3309 if (sig > ifmgd->rssi_max_thold && 3310 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3311 ifmgd->last_ave_beacon_signal = sig; 3312 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH); 3313 } else if (sig < ifmgd->rssi_min_thold && 3314 (last_sig >= ifmgd->rssi_max_thold || 3315 last_sig == 0)) { 3316 ifmgd->last_ave_beacon_signal = sig; 3317 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW); 3318 } 3319 } 3320 3321 if (bss_conf->cqm_rssi_thold && 3322 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3323 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3324 int sig = ifmgd->ave_beacon_signal / 16; 3325 int last_event = ifmgd->last_cqm_event_signal; 3326 int thold = bss_conf->cqm_rssi_thold; 3327 int hyst = bss_conf->cqm_rssi_hyst; 3328 if (sig < thold && 3329 (last_event == 0 || sig < last_event - hyst)) { 3330 ifmgd->last_cqm_event_signal = sig; 3331 ieee80211_cqm_rssi_notify( 3332 &sdata->vif, 3333 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3334 GFP_KERNEL); 3335 } else if (sig > thold && 3336 (last_event == 0 || sig > last_event + hyst)) { 3337 ifmgd->last_cqm_event_signal = sig; 3338 ieee80211_cqm_rssi_notify( 3339 &sdata->vif, 3340 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3341 GFP_KERNEL); 3342 } 3343 } 3344 3345 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3346 mlme_dbg_ratelimited(sdata, 3347 "cancelling AP probe due to a received beacon\n"); 3348 ieee80211_reset_ap_probe(sdata); 3349 } 3350 3351 /* 3352 * Push the beacon loss detection into the future since 3353 * we are processing a beacon from the AP just now. 3354 */ 3355 ieee80211_sta_reset_beacon_monitor(sdata); 3356 3357 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3358 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3359 len - baselen, false, &elems, 3360 care_about_ies, ncrc); 3361 3362 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { 3363 bool directed_tim = ieee80211_check_tim(elems.tim, 3364 elems.tim_len, 3365 ifmgd->aid); 3366 if (directed_tim) { 3367 if (local->hw.conf.dynamic_ps_timeout > 0) { 3368 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3369 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3370 ieee80211_hw_config(local, 3371 IEEE80211_CONF_CHANGE_PS); 3372 } 3373 ieee80211_send_nullfunc(local, sdata, 0); 3374 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3375 local->pspolling = true; 3376 3377 /* 3378 * Here is assumed that the driver will be 3379 * able to send ps-poll frame and receive a 3380 * response even though power save mode is 3381 * enabled, but some drivers might require 3382 * to disable power save here. This needs 3383 * to be investigated. 3384 */ 3385 ieee80211_send_pspoll(local, sdata); 3386 } 3387 } 3388 } 3389 3390 if (sdata->vif.p2p) { 3391 struct ieee80211_p2p_noa_attr noa = {}; 3392 int ret; 3393 3394 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3395 len - baselen, 3396 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3397 (u8 *) &noa, sizeof(noa)); 3398 if (ret >= 2) { 3399 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3400 /* valid noa_attr and index changed */ 3401 sdata->u.mgd.p2p_noa_index = noa.index; 3402 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3403 changed |= BSS_CHANGED_P2P_PS; 3404 /* 3405 * make sure we update all information, the CRC 3406 * mechanism doesn't look at P2P attributes. 3407 */ 3408 ifmgd->beacon_crc_valid = false; 3409 } 3410 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3411 /* noa_attr not found and we had valid noa_attr before */ 3412 sdata->u.mgd.p2p_noa_index = -1; 3413 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3414 changed |= BSS_CHANGED_P2P_PS; 3415 ifmgd->beacon_crc_valid = false; 3416 } 3417 } 3418 3419 if (ifmgd->csa_waiting_bcn) 3420 ieee80211_chswitch_post_beacon(sdata); 3421 3422 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3423 return; 3424 ifmgd->beacon_crc = ncrc; 3425 ifmgd->beacon_crc_valid = true; 3426 3427 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3428 3429 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3430 rx_status->device_timestamp, 3431 &elems, true); 3432 3433 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3434 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3435 elems.wmm_param_len)) 3436 changed |= BSS_CHANGED_QOS; 3437 3438 /* 3439 * If we haven't had a beacon before, tell the driver about the 3440 * DTIM period (and beacon timing if desired) now. 3441 */ 3442 if (!ifmgd->have_beacon) { 3443 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3444 if (elems.tim) 3445 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3446 else 3447 bss_conf->dtim_period = 1; 3448 3449 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { 3450 sdata->vif.bss_conf.sync_tsf = 3451 le64_to_cpu(mgmt->u.beacon.timestamp); 3452 sdata->vif.bss_conf.sync_device_ts = 3453 rx_status->device_timestamp; 3454 if (elems.tim) 3455 sdata->vif.bss_conf.sync_dtim_count = 3456 elems.tim->dtim_count; 3457 else 3458 sdata->vif.bss_conf.sync_dtim_count = 0; 3459 } 3460 3461 changed |= BSS_CHANGED_BEACON_INFO; 3462 ifmgd->have_beacon = true; 3463 3464 mutex_lock(&local->iflist_mtx); 3465 ieee80211_recalc_ps(local, -1); 3466 mutex_unlock(&local->iflist_mtx); 3467 3468 ieee80211_recalc_ps_vif(sdata); 3469 } 3470 3471 if (elems.erp_info) { 3472 erp_valid = true; 3473 erp_value = elems.erp_info[0]; 3474 } else { 3475 erp_valid = false; 3476 } 3477 changed |= ieee80211_handle_bss_capability(sdata, 3478 le16_to_cpu(mgmt->u.beacon.capab_info), 3479 erp_valid, erp_value); 3480 3481 mutex_lock(&local->sta_mtx); 3482 sta = sta_info_get(sdata, bssid); 3483 3484 if (ieee80211_config_bw(sdata, sta, 3485 elems.ht_cap_elem, elems.ht_operation, 3486 elems.vht_operation, bssid, &changed)) { 3487 mutex_unlock(&local->sta_mtx); 3488 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3489 WLAN_REASON_DEAUTH_LEAVING, 3490 true, deauth_buf); 3491 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf, 3492 sizeof(deauth_buf)); 3493 return; 3494 } 3495 3496 if (sta && elems.opmode_notif) 3497 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3498 rx_status->band, true); 3499 mutex_unlock(&local->sta_mtx); 3500 3501 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3502 elems.country_elem, 3503 elems.country_elem_len, 3504 elems.pwr_constr_elem, 3505 elems.cisco_dtpc_elem); 3506 3507 ieee80211_bss_info_change_notify(sdata, changed); 3508 } 3509 3510 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3511 struct sk_buff *skb) 3512 { 3513 struct ieee80211_rx_status *rx_status; 3514 struct ieee80211_mgmt *mgmt; 3515 u16 fc; 3516 struct ieee802_11_elems elems; 3517 int ies_len; 3518 3519 rx_status = (struct ieee80211_rx_status *) skb->cb; 3520 mgmt = (struct ieee80211_mgmt *) skb->data; 3521 fc = le16_to_cpu(mgmt->frame_control); 3522 3523 sdata_lock(sdata); 3524 3525 switch (fc & IEEE80211_FCTL_STYPE) { 3526 case IEEE80211_STYPE_BEACON: 3527 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3528 break; 3529 case IEEE80211_STYPE_PROBE_RESP: 3530 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3531 break; 3532 case IEEE80211_STYPE_AUTH: 3533 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3534 break; 3535 case IEEE80211_STYPE_DEAUTH: 3536 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3537 break; 3538 case IEEE80211_STYPE_DISASSOC: 3539 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3540 break; 3541 case IEEE80211_STYPE_ASSOC_RESP: 3542 case IEEE80211_STYPE_REASSOC_RESP: 3543 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3544 break; 3545 case IEEE80211_STYPE_ACTION: 3546 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3547 ies_len = skb->len - 3548 offsetof(struct ieee80211_mgmt, 3549 u.action.u.chan_switch.variable); 3550 3551 if (ies_len < 0) 3552 break; 3553 3554 ieee802_11_parse_elems( 3555 mgmt->u.action.u.chan_switch.variable, 3556 ies_len, true, &elems); 3557 3558 if (elems.parse_error) 3559 break; 3560 3561 ieee80211_sta_process_chanswitch(sdata, 3562 rx_status->mactime, 3563 rx_status->device_timestamp, 3564 &elems, false); 3565 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3566 ies_len = skb->len - 3567 offsetof(struct ieee80211_mgmt, 3568 u.action.u.ext_chan_switch.variable); 3569 3570 if (ies_len < 0) 3571 break; 3572 3573 ieee802_11_parse_elems( 3574 mgmt->u.action.u.ext_chan_switch.variable, 3575 ies_len, true, &elems); 3576 3577 if (elems.parse_error) 3578 break; 3579 3580 /* for the handling code pretend this was also an IE */ 3581 elems.ext_chansw_ie = 3582 &mgmt->u.action.u.ext_chan_switch.data; 3583 3584 ieee80211_sta_process_chanswitch(sdata, 3585 rx_status->mactime, 3586 rx_status->device_timestamp, 3587 &elems, false); 3588 } 3589 break; 3590 } 3591 sdata_unlock(sdata); 3592 } 3593 3594 static void ieee80211_sta_timer(unsigned long data) 3595 { 3596 struct ieee80211_sub_if_data *sdata = 3597 (struct ieee80211_sub_if_data *) data; 3598 3599 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3600 } 3601 3602 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 3603 u8 *bssid, u8 reason, bool tx) 3604 { 3605 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3606 3607 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 3608 tx, frame_buf); 3609 3610 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 3611 IEEE80211_DEAUTH_FRAME_LEN); 3612 } 3613 3614 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata) 3615 { 3616 struct ieee80211_local *local = sdata->local; 3617 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3618 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 3619 u32 tx_flags = 0; 3620 3621 sdata_assert_lock(sdata); 3622 3623 if (WARN_ON_ONCE(!auth_data)) 3624 return -EINVAL; 3625 3626 auth_data->tries++; 3627 3628 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 3629 sdata_info(sdata, "authentication with %pM timed out\n", 3630 auth_data->bss->bssid); 3631 3632 /* 3633 * Most likely AP is not in the range so remove the 3634 * bss struct for that AP. 3635 */ 3636 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 3637 3638 return -ETIMEDOUT; 3639 } 3640 3641 drv_mgd_prepare_tx(local, sdata); 3642 3643 if (auth_data->bss->proberesp_ies) { 3644 u16 trans = 1; 3645 u16 status = 0; 3646 3647 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 3648 auth_data->bss->bssid, auth_data->tries, 3649 IEEE80211_AUTH_MAX_TRIES); 3650 3651 auth_data->expected_transaction = 2; 3652 3653 if (auth_data->algorithm == WLAN_AUTH_SAE) { 3654 trans = auth_data->sae_trans; 3655 status = auth_data->sae_status; 3656 auth_data->expected_transaction = trans; 3657 } 3658 3659 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 3660 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3661 IEEE80211_TX_INTFL_MLME_CONN_TX; 3662 3663 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 3664 auth_data->data, auth_data->data_len, 3665 auth_data->bss->bssid, 3666 auth_data->bss->bssid, NULL, 0, 0, 3667 tx_flags); 3668 } else { 3669 const u8 *ssidie; 3670 3671 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n", 3672 auth_data->bss->bssid, auth_data->tries, 3673 IEEE80211_AUTH_MAX_TRIES); 3674 3675 rcu_read_lock(); 3676 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID); 3677 if (!ssidie) { 3678 rcu_read_unlock(); 3679 return -EINVAL; 3680 } 3681 /* 3682 * Direct probe is sent to broadcast address as some APs 3683 * will not answer to direct packet in unassociated state. 3684 */ 3685 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL, 3686 ssidie + 2, ssidie[1], 3687 NULL, 0, (u32) -1, true, 0, 3688 auth_data->bss->channel, false); 3689 rcu_read_unlock(); 3690 } 3691 3692 if (tx_flags == 0) { 3693 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 3694 auth_data->timeout_started = true; 3695 run_again(sdata, auth_data->timeout); 3696 } else { 3697 auth_data->timeout = 3698 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 3699 auth_data->timeout_started = true; 3700 run_again(sdata, auth_data->timeout); 3701 } 3702 3703 return 0; 3704 } 3705 3706 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 3707 { 3708 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3709 struct ieee80211_local *local = sdata->local; 3710 3711 sdata_assert_lock(sdata); 3712 3713 assoc_data->tries++; 3714 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 3715 sdata_info(sdata, "association with %pM timed out\n", 3716 assoc_data->bss->bssid); 3717 3718 /* 3719 * Most likely AP is not in the range so remove the 3720 * bss struct for that AP. 3721 */ 3722 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 3723 3724 return -ETIMEDOUT; 3725 } 3726 3727 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 3728 assoc_data->bss->bssid, assoc_data->tries, 3729 IEEE80211_ASSOC_MAX_TRIES); 3730 ieee80211_send_assoc(sdata); 3731 3732 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) { 3733 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 3734 assoc_data->timeout_started = true; 3735 run_again(sdata, assoc_data->timeout); 3736 } else { 3737 assoc_data->timeout = 3738 round_jiffies_up(jiffies + 3739 IEEE80211_ASSOC_TIMEOUT_LONG); 3740 assoc_data->timeout_started = true; 3741 run_again(sdata, assoc_data->timeout); 3742 } 3743 3744 return 0; 3745 } 3746 3747 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 3748 __le16 fc, bool acked) 3749 { 3750 struct ieee80211_local *local = sdata->local; 3751 3752 sdata->u.mgd.status_fc = fc; 3753 sdata->u.mgd.status_acked = acked; 3754 sdata->u.mgd.status_received = true; 3755 3756 ieee80211_queue_work(&local->hw, &sdata->work); 3757 } 3758 3759 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 3760 { 3761 struct ieee80211_local *local = sdata->local; 3762 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3763 3764 sdata_lock(sdata); 3765 3766 if (ifmgd->status_received) { 3767 __le16 fc = ifmgd->status_fc; 3768 bool status_acked = ifmgd->status_acked; 3769 3770 ifmgd->status_received = false; 3771 if (ifmgd->auth_data && 3772 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) { 3773 if (status_acked) { 3774 ifmgd->auth_data->timeout = 3775 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; 3776 run_again(sdata, ifmgd->auth_data->timeout); 3777 } else { 3778 ifmgd->auth_data->timeout = jiffies - 1; 3779 } 3780 ifmgd->auth_data->timeout_started = true; 3781 } else if (ifmgd->assoc_data && 3782 (ieee80211_is_assoc_req(fc) || 3783 ieee80211_is_reassoc_req(fc))) { 3784 if (status_acked) { 3785 ifmgd->assoc_data->timeout = 3786 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 3787 run_again(sdata, ifmgd->assoc_data->timeout); 3788 } else { 3789 ifmgd->assoc_data->timeout = jiffies - 1; 3790 } 3791 ifmgd->assoc_data->timeout_started = true; 3792 } 3793 } 3794 3795 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 3796 time_after(jiffies, ifmgd->auth_data->timeout)) { 3797 if (ifmgd->auth_data->done) { 3798 /* 3799 * ok ... we waited for assoc but userspace didn't, 3800 * so let's just kill the auth data 3801 */ 3802 ieee80211_destroy_auth_data(sdata, false); 3803 } else if (ieee80211_probe_auth(sdata)) { 3804 u8 bssid[ETH_ALEN]; 3805 3806 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3807 3808 ieee80211_destroy_auth_data(sdata, false); 3809 3810 cfg80211_auth_timeout(sdata->dev, bssid); 3811 } 3812 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 3813 run_again(sdata, ifmgd->auth_data->timeout); 3814 3815 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 3816 time_after(jiffies, ifmgd->assoc_data->timeout)) { 3817 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 3818 ieee80211_do_assoc(sdata)) { 3819 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 3820 3821 ieee80211_destroy_assoc_data(sdata, false); 3822 cfg80211_assoc_timeout(sdata->dev, bss); 3823 } 3824 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 3825 run_again(sdata, ifmgd->assoc_data->timeout); 3826 3827 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 3828 ifmgd->associated) { 3829 u8 bssid[ETH_ALEN]; 3830 int max_tries; 3831 3832 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 3833 3834 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 3835 max_tries = max_nullfunc_tries; 3836 else 3837 max_tries = max_probe_tries; 3838 3839 /* ACK received for nullfunc probing frame */ 3840 if (!ifmgd->probe_send_count) 3841 ieee80211_reset_ap_probe(sdata); 3842 else if (ifmgd->nullfunc_failed) { 3843 if (ifmgd->probe_send_count < max_tries) { 3844 mlme_dbg(sdata, 3845 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 3846 bssid, ifmgd->probe_send_count, 3847 max_tries); 3848 ieee80211_mgd_probe_ap_send(sdata); 3849 } else { 3850 mlme_dbg(sdata, 3851 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 3852 bssid); 3853 ieee80211_sta_connection_lost(sdata, bssid, 3854 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3855 false); 3856 } 3857 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 3858 run_again(sdata, ifmgd->probe_timeout); 3859 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { 3860 mlme_dbg(sdata, 3861 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 3862 bssid, probe_wait_ms); 3863 ieee80211_sta_connection_lost(sdata, bssid, 3864 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3865 } else if (ifmgd->probe_send_count < max_tries) { 3866 mlme_dbg(sdata, 3867 "No probe response from AP %pM after %dms, try %d/%i\n", 3868 bssid, probe_wait_ms, 3869 ifmgd->probe_send_count, max_tries); 3870 ieee80211_mgd_probe_ap_send(sdata); 3871 } else { 3872 /* 3873 * We actually lost the connection ... or did we? 3874 * Let's make sure! 3875 */ 3876 wiphy_debug(local->hw.wiphy, 3877 "%s: No probe response from AP %pM" 3878 " after %dms, disconnecting.\n", 3879 sdata->name, 3880 bssid, probe_wait_ms); 3881 3882 ieee80211_sta_connection_lost(sdata, bssid, 3883 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3884 } 3885 } 3886 3887 sdata_unlock(sdata); 3888 } 3889 3890 static void ieee80211_sta_bcn_mon_timer(unsigned long data) 3891 { 3892 struct ieee80211_sub_if_data *sdata = 3893 (struct ieee80211_sub_if_data *) data; 3894 struct ieee80211_local *local = sdata->local; 3895 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3896 3897 if (local->quiescing) 3898 return; 3899 3900 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 3901 return; 3902 3903 sdata->u.mgd.connection_loss = false; 3904 ieee80211_queue_work(&sdata->local->hw, 3905 &sdata->u.mgd.beacon_connection_loss_work); 3906 } 3907 3908 static void ieee80211_sta_conn_mon_timer(unsigned long data) 3909 { 3910 struct ieee80211_sub_if_data *sdata = 3911 (struct ieee80211_sub_if_data *) data; 3912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3913 struct ieee80211_local *local = sdata->local; 3914 3915 if (local->quiescing) 3916 return; 3917 3918 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 3919 return; 3920 3921 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 3922 } 3923 3924 static void ieee80211_sta_monitor_work(struct work_struct *work) 3925 { 3926 struct ieee80211_sub_if_data *sdata = 3927 container_of(work, struct ieee80211_sub_if_data, 3928 u.mgd.monitor_work); 3929 3930 ieee80211_mgd_probe_ap(sdata, false); 3931 } 3932 3933 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 3934 { 3935 u32 flags; 3936 3937 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 3938 __ieee80211_stop_poll(sdata); 3939 3940 /* let's probe the connection once */ 3941 flags = sdata->local->hw.flags; 3942 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR)) 3943 ieee80211_queue_work(&sdata->local->hw, 3944 &sdata->u.mgd.monitor_work); 3945 /* and do all the other regular work too */ 3946 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3947 } 3948 } 3949 3950 #ifdef CONFIG_PM 3951 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 3952 { 3953 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3954 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3955 3956 sdata_lock(sdata); 3957 3958 if (ifmgd->auth_data || ifmgd->assoc_data) { 3959 const u8 *bssid = ifmgd->auth_data ? 3960 ifmgd->auth_data->bss->bssid : 3961 ifmgd->assoc_data->bss->bssid; 3962 3963 /* 3964 * If we are trying to authenticate / associate while suspending, 3965 * cfg80211 won't know and won't actually abort those attempts, 3966 * thus we need to do that ourselves. 3967 */ 3968 ieee80211_send_deauth_disassoc(sdata, bssid, 3969 IEEE80211_STYPE_DEAUTH, 3970 WLAN_REASON_DEAUTH_LEAVING, 3971 false, frame_buf); 3972 if (ifmgd->assoc_data) 3973 ieee80211_destroy_assoc_data(sdata, false); 3974 if (ifmgd->auth_data) 3975 ieee80211_destroy_auth_data(sdata, false); 3976 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 3977 IEEE80211_DEAUTH_FRAME_LEN); 3978 } 3979 3980 sdata_unlock(sdata); 3981 } 3982 3983 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 3984 { 3985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3986 3987 sdata_lock(sdata); 3988 if (!ifmgd->associated) { 3989 sdata_unlock(sdata); 3990 return; 3991 } 3992 3993 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 3994 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 3995 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 3996 ieee80211_sta_connection_lost(sdata, 3997 ifmgd->associated->bssid, 3998 WLAN_REASON_UNSPECIFIED, 3999 true); 4000 sdata_unlock(sdata); 4001 return; 4002 } 4003 sdata_unlock(sdata); 4004 } 4005 #endif 4006 4007 /* interface setup */ 4008 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4009 { 4010 struct ieee80211_if_managed *ifmgd; 4011 4012 ifmgd = &sdata->u.mgd; 4013 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4014 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4015 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4016 ieee80211_beacon_connection_loss_work); 4017 INIT_WORK(&ifmgd->csa_connection_drop_work, 4018 ieee80211_csa_connection_drop_work); 4019 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4020 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4021 ieee80211_tdls_peer_del_work); 4022 setup_timer(&ifmgd->timer, ieee80211_sta_timer, 4023 (unsigned long) sdata); 4024 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 4025 (unsigned long) sdata); 4026 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 4027 (unsigned long) sdata); 4028 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 4029 (unsigned long) sdata); 4030 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4031 ieee80211_sta_handle_tspec_ac_params_wk); 4032 4033 ifmgd->flags = 0; 4034 ifmgd->powersave = sdata->wdev.ps; 4035 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4036 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4037 ifmgd->p2p_noa_index = -1; 4038 4039 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4040 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4041 else 4042 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4043 4044 /* Setup TDLS data */ 4045 spin_lock_init(&ifmgd->teardown_lock); 4046 ifmgd->teardown_skb = NULL; 4047 ifmgd->orig_teardown_skb = NULL; 4048 } 4049 4050 /* scan finished notification */ 4051 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4052 { 4053 struct ieee80211_sub_if_data *sdata; 4054 4055 /* Restart STA timers */ 4056 rcu_read_lock(); 4057 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4058 if (ieee80211_sdata_running(sdata)) 4059 ieee80211_restart_sta_timer(sdata); 4060 } 4061 rcu_read_unlock(); 4062 } 4063 4064 int ieee80211_max_network_latency(struct notifier_block *nb, 4065 unsigned long data, void *dummy) 4066 { 4067 s32 latency_usec = (s32) data; 4068 struct ieee80211_local *local = 4069 container_of(nb, struct ieee80211_local, 4070 network_latency_notifier); 4071 4072 mutex_lock(&local->iflist_mtx); 4073 ieee80211_recalc_ps(local, latency_usec); 4074 mutex_unlock(&local->iflist_mtx); 4075 4076 return NOTIFY_OK; 4077 } 4078 4079 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4080 struct cfg80211_bss *cbss) 4081 { 4082 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4083 const u8 *ht_cap_ie, *vht_cap_ie; 4084 const struct ieee80211_ht_cap *ht_cap; 4085 const struct ieee80211_vht_cap *vht_cap; 4086 u8 chains = 1; 4087 4088 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4089 return chains; 4090 4091 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4092 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4093 ht_cap = (void *)(ht_cap_ie + 2); 4094 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4095 /* 4096 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4097 * "Tx Unequal Modulation Supported" fields. 4098 */ 4099 } 4100 4101 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4102 return chains; 4103 4104 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4105 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4106 u8 nss; 4107 u16 tx_mcs_map; 4108 4109 vht_cap = (void *)(vht_cap_ie + 2); 4110 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4111 for (nss = 8; nss > 0; nss--) { 4112 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4113 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4114 break; 4115 } 4116 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4117 chains = max(chains, nss); 4118 } 4119 4120 return chains; 4121 } 4122 4123 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4124 struct cfg80211_bss *cbss) 4125 { 4126 struct ieee80211_local *local = sdata->local; 4127 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4128 const struct ieee80211_ht_cap *ht_cap = NULL; 4129 const struct ieee80211_ht_operation *ht_oper = NULL; 4130 const struct ieee80211_vht_operation *vht_oper = NULL; 4131 struct ieee80211_supported_band *sband; 4132 struct cfg80211_chan_def chandef; 4133 int ret; 4134 4135 sband = local->hw.wiphy->bands[cbss->channel->band]; 4136 4137 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4138 IEEE80211_STA_DISABLE_80P80MHZ | 4139 IEEE80211_STA_DISABLE_160MHZ); 4140 4141 rcu_read_lock(); 4142 4143 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4144 sband->ht_cap.ht_supported) { 4145 const u8 *ht_oper_ie, *ht_cap_ie; 4146 4147 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4148 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4149 ht_oper = (void *)(ht_oper_ie + 2); 4150 4151 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4152 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4153 ht_cap = (void *)(ht_cap_ie + 2); 4154 4155 if (!ht_cap) { 4156 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4157 ht_oper = NULL; 4158 } 4159 } 4160 4161 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4162 sband->vht_cap.vht_supported) { 4163 const u8 *vht_oper_ie, *vht_cap; 4164 4165 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4166 WLAN_EID_VHT_OPERATION); 4167 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4168 vht_oper = (void *)(vht_oper_ie + 2); 4169 if (vht_oper && !ht_oper) { 4170 vht_oper = NULL; 4171 sdata_info(sdata, 4172 "AP advertised VHT without HT, disabling both\n"); 4173 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4174 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4175 } 4176 4177 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4178 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4179 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4180 vht_oper = NULL; 4181 } 4182 } 4183 4184 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4185 cbss->channel, 4186 ht_cap, ht_oper, vht_oper, 4187 &chandef, false); 4188 4189 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4190 local->rx_chains); 4191 4192 rcu_read_unlock(); 4193 4194 /* will change later if needed */ 4195 sdata->smps_mode = IEEE80211_SMPS_OFF; 4196 4197 mutex_lock(&local->mtx); 4198 /* 4199 * If this fails (possibly due to channel context sharing 4200 * on incompatible channels, e.g. 80+80 and 160 sharing the 4201 * same control channel) try to use a smaller bandwidth. 4202 */ 4203 ret = ieee80211_vif_use_channel(sdata, &chandef, 4204 IEEE80211_CHANCTX_SHARED); 4205 4206 /* don't downgrade for 5 and 10 MHz channels, though. */ 4207 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4208 chandef.width == NL80211_CHAN_WIDTH_10) 4209 goto out; 4210 4211 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4212 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4213 ret = ieee80211_vif_use_channel(sdata, &chandef, 4214 IEEE80211_CHANCTX_SHARED); 4215 } 4216 out: 4217 mutex_unlock(&local->mtx); 4218 return ret; 4219 } 4220 4221 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4222 struct cfg80211_bss *cbss, bool assoc) 4223 { 4224 struct ieee80211_local *local = sdata->local; 4225 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4226 struct ieee80211_bss *bss = (void *)cbss->priv; 4227 struct sta_info *new_sta = NULL; 4228 struct ieee80211_supported_band *sband; 4229 struct ieee80211_sta_ht_cap sta_ht_cap; 4230 bool have_sta = false, is_override = false; 4231 int err; 4232 4233 sband = local->hw.wiphy->bands[cbss->channel->band]; 4234 4235 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4236 return -EINVAL; 4237 4238 if (assoc) { 4239 rcu_read_lock(); 4240 have_sta = sta_info_get(sdata, cbss->bssid); 4241 rcu_read_unlock(); 4242 } 4243 4244 if (!have_sta) { 4245 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4246 if (!new_sta) 4247 return -ENOMEM; 4248 } 4249 4250 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 4251 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 4252 4253 is_override = (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) != 4254 (sband->ht_cap.cap & 4255 IEEE80211_HT_CAP_SUP_WIDTH_20_40); 4256 4257 if (new_sta || is_override) { 4258 err = ieee80211_prep_channel(sdata, cbss); 4259 if (err) { 4260 if (new_sta) 4261 sta_info_free(local, new_sta); 4262 return -EINVAL; 4263 } 4264 } 4265 4266 if (new_sta) { 4267 u32 rates = 0, basic_rates = 0; 4268 bool have_higher_than_11mbit; 4269 int min_rate = INT_MAX, min_rate_index = -1; 4270 struct ieee80211_chanctx_conf *chanctx_conf; 4271 const struct cfg80211_bss_ies *ies; 4272 int shift = ieee80211_vif_get_shift(&sdata->vif); 4273 u32 rate_flags; 4274 4275 rcu_read_lock(); 4276 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 4277 if (WARN_ON(!chanctx_conf)) { 4278 rcu_read_unlock(); 4279 sta_info_free(local, new_sta); 4280 return -EINVAL; 4281 } 4282 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 4283 rcu_read_unlock(); 4284 4285 ieee80211_get_rates(sband, bss->supp_rates, 4286 bss->supp_rates_len, 4287 &rates, &basic_rates, 4288 &have_higher_than_11mbit, 4289 &min_rate, &min_rate_index, 4290 shift, rate_flags); 4291 4292 /* 4293 * This used to be a workaround for basic rates missing 4294 * in the association response frame. Now that we no 4295 * longer use the basic rates from there, it probably 4296 * doesn't happen any more, but keep the workaround so 4297 * in case some *other* APs are buggy in different ways 4298 * we can connect -- with a warning. 4299 */ 4300 if (!basic_rates && min_rate_index >= 0) { 4301 sdata_info(sdata, 4302 "No basic rates, using min rate instead\n"); 4303 basic_rates = BIT(min_rate_index); 4304 } 4305 4306 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4307 sdata->vif.bss_conf.basic_rates = basic_rates; 4308 4309 /* cf. IEEE 802.11 9.2.12 */ 4310 if (cbss->channel->band == IEEE80211_BAND_2GHZ && 4311 have_higher_than_11mbit) 4312 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4313 else 4314 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4315 4316 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4317 4318 /* set timing information */ 4319 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4320 rcu_read_lock(); 4321 ies = rcu_dereference(cbss->beacon_ies); 4322 if (ies) { 4323 const u8 *tim_ie; 4324 4325 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4326 sdata->vif.bss_conf.sync_device_ts = 4327 bss->device_ts_beacon; 4328 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4329 ies->data, ies->len); 4330 if (tim_ie && tim_ie[1] >= 2) 4331 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4332 else 4333 sdata->vif.bss_conf.sync_dtim_count = 0; 4334 } else if (!(local->hw.flags & 4335 IEEE80211_HW_TIMING_BEACON_ONLY)) { 4336 ies = rcu_dereference(cbss->proberesp_ies); 4337 /* must be non-NULL since beacon IEs were NULL */ 4338 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4339 sdata->vif.bss_conf.sync_device_ts = 4340 bss->device_ts_presp; 4341 sdata->vif.bss_conf.sync_dtim_count = 0; 4342 } else { 4343 sdata->vif.bss_conf.sync_tsf = 0; 4344 sdata->vif.bss_conf.sync_device_ts = 0; 4345 sdata->vif.bss_conf.sync_dtim_count = 0; 4346 } 4347 rcu_read_unlock(); 4348 4349 /* tell driver about BSSID, basic rates and timing */ 4350 ieee80211_bss_info_change_notify(sdata, 4351 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4352 BSS_CHANGED_BEACON_INT); 4353 4354 if (assoc) 4355 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4356 4357 err = sta_info_insert(new_sta); 4358 new_sta = NULL; 4359 if (err) { 4360 sdata_info(sdata, 4361 "failed to insert STA entry for the AP (error %d)\n", 4362 err); 4363 return err; 4364 } 4365 } else 4366 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4367 4368 return 0; 4369 } 4370 4371 /* config hooks */ 4372 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4373 struct cfg80211_auth_request *req) 4374 { 4375 struct ieee80211_local *local = sdata->local; 4376 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4377 struct ieee80211_mgd_auth_data *auth_data; 4378 u16 auth_alg; 4379 int err; 4380 4381 /* prepare auth data structure */ 4382 4383 switch (req->auth_type) { 4384 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4385 auth_alg = WLAN_AUTH_OPEN; 4386 break; 4387 case NL80211_AUTHTYPE_SHARED_KEY: 4388 if (IS_ERR(local->wep_tx_tfm)) 4389 return -EOPNOTSUPP; 4390 auth_alg = WLAN_AUTH_SHARED_KEY; 4391 break; 4392 case NL80211_AUTHTYPE_FT: 4393 auth_alg = WLAN_AUTH_FT; 4394 break; 4395 case NL80211_AUTHTYPE_NETWORK_EAP: 4396 auth_alg = WLAN_AUTH_LEAP; 4397 break; 4398 case NL80211_AUTHTYPE_SAE: 4399 auth_alg = WLAN_AUTH_SAE; 4400 break; 4401 default: 4402 return -EOPNOTSUPP; 4403 } 4404 4405 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len + 4406 req->ie_len, GFP_KERNEL); 4407 if (!auth_data) 4408 return -ENOMEM; 4409 4410 auth_data->bss = req->bss; 4411 4412 if (req->sae_data_len >= 4) { 4413 __le16 *pos = (__le16 *) req->sae_data; 4414 auth_data->sae_trans = le16_to_cpu(pos[0]); 4415 auth_data->sae_status = le16_to_cpu(pos[1]); 4416 memcpy(auth_data->data, req->sae_data + 4, 4417 req->sae_data_len - 4); 4418 auth_data->data_len += req->sae_data_len - 4; 4419 } 4420 4421 if (req->ie && req->ie_len) { 4422 memcpy(&auth_data->data[auth_data->data_len], 4423 req->ie, req->ie_len); 4424 auth_data->data_len += req->ie_len; 4425 } 4426 4427 if (req->key && req->key_len) { 4428 auth_data->key_len = req->key_len; 4429 auth_data->key_idx = req->key_idx; 4430 memcpy(auth_data->key, req->key, req->key_len); 4431 } 4432 4433 auth_data->algorithm = auth_alg; 4434 4435 /* try to authenticate/probe */ 4436 4437 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4438 ifmgd->assoc_data) { 4439 err = -EBUSY; 4440 goto err_free; 4441 } 4442 4443 if (ifmgd->auth_data) 4444 ieee80211_destroy_auth_data(sdata, false); 4445 4446 /* prep auth_data so we don't go into idle on disassoc */ 4447 ifmgd->auth_data = auth_data; 4448 4449 if (ifmgd->associated) { 4450 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4451 4452 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4453 WLAN_REASON_UNSPECIFIED, 4454 false, frame_buf); 4455 4456 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4457 sizeof(frame_buf)); 4458 } 4459 4460 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4461 4462 err = ieee80211_prep_connection(sdata, req->bss, false); 4463 if (err) 4464 goto err_clear; 4465 4466 err = ieee80211_probe_auth(sdata); 4467 if (err) { 4468 sta_info_destroy_addr(sdata, req->bss->bssid); 4469 goto err_clear; 4470 } 4471 4472 /* hold our own reference */ 4473 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4474 return 0; 4475 4476 err_clear: 4477 memset(ifmgd->bssid, 0, ETH_ALEN); 4478 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4479 ifmgd->auth_data = NULL; 4480 err_free: 4481 kfree(auth_data); 4482 return err; 4483 } 4484 4485 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata, 4486 const u8 *wmm_param, int len) 4487 { 4488 const u8 *pos; 4489 size_t left; 4490 4491 if (len < 8) 4492 return false; 4493 4494 if (wmm_param[5] != 1 /* version */) 4495 return false; 4496 4497 pos = wmm_param + 8; 4498 left = len - 8; 4499 4500 for (; left >= 4; left -= 4, pos += 4) { 4501 u8 aifsn = pos[0] & 0x0f; 4502 u8 ecwmin = pos[1] & 0x0f; 4503 u8 ecwmax = (pos[1] & 0xf0) >> 4; 4504 int aci = (pos[0] >> 5) & 0x03; 4505 4506 if (aifsn < 2) { 4507 sdata_info(sdata, 4508 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n", 4509 aifsn, aci); 4510 return false; 4511 } 4512 if (ecwmin > ecwmax) { 4513 sdata_info(sdata, 4514 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n", 4515 ecwmin, ecwmax, aci); 4516 return false; 4517 } 4518 } 4519 4520 return true; 4521 } 4522 4523 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 4524 struct cfg80211_assoc_request *req) 4525 { 4526 struct ieee80211_local *local = sdata->local; 4527 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4528 struct ieee80211_bss *bss = (void *)req->bss->priv; 4529 struct ieee80211_mgd_assoc_data *assoc_data; 4530 const struct cfg80211_bss_ies *beacon_ies; 4531 struct ieee80211_supported_band *sband; 4532 const u8 *ssidie, *ht_ie, *vht_ie; 4533 int i, err; 4534 4535 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 4536 if (!assoc_data) 4537 return -ENOMEM; 4538 4539 rcu_read_lock(); 4540 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 4541 if (!ssidie) { 4542 rcu_read_unlock(); 4543 kfree(assoc_data); 4544 return -EINVAL; 4545 } 4546 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 4547 assoc_data->ssid_len = ssidie[1]; 4548 rcu_read_unlock(); 4549 4550 if (ifmgd->associated) { 4551 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4552 4553 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4554 WLAN_REASON_UNSPECIFIED, 4555 false, frame_buf); 4556 4557 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4558 sizeof(frame_buf)); 4559 } 4560 4561 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 4562 err = -EBUSY; 4563 goto err_free; 4564 } 4565 4566 if (ifmgd->assoc_data) { 4567 err = -EBUSY; 4568 goto err_free; 4569 } 4570 4571 if (ifmgd->auth_data) { 4572 bool match; 4573 4574 /* keep sta info, bssid if matching */ 4575 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 4576 ieee80211_destroy_auth_data(sdata, match); 4577 } 4578 4579 /* prepare assoc data */ 4580 4581 ifmgd->beacon_crc_valid = false; 4582 4583 assoc_data->wmm = bss->wmm_used && 4584 (local->hw.queues >= IEEE80211_NUM_ACS); 4585 if (assoc_data->wmm) { 4586 /* try to check validity of WMM params IE */ 4587 const struct cfg80211_bss_ies *ies; 4588 const u8 *wp, *start, *end; 4589 4590 rcu_read_lock(); 4591 ies = rcu_dereference(req->bss->ies); 4592 start = ies->data; 4593 end = start + ies->len; 4594 4595 while (true) { 4596 wp = cfg80211_find_vendor_ie( 4597 WLAN_OUI_MICROSOFT, 4598 WLAN_OUI_TYPE_MICROSOFT_WMM, 4599 start, end - start); 4600 if (!wp) 4601 break; 4602 start = wp + wp[1] + 2; 4603 /* if this IE is too short, try the next */ 4604 if (wp[1] <= 4) 4605 continue; 4606 /* if this IE is WMM params, we found what we wanted */ 4607 if (wp[6] == 1) 4608 break; 4609 } 4610 4611 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2, 4612 wp[1] - 2)) { 4613 assoc_data->wmm = false; 4614 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 4615 } 4616 rcu_read_unlock(); 4617 } 4618 4619 /* 4620 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 4621 * We still associate in non-HT mode (11a/b/g) if any one of these 4622 * ciphers is configured as pairwise. 4623 * We can set this to true for non-11n hardware, that'll be checked 4624 * separately along with the peer capabilities. 4625 */ 4626 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4627 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4628 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4629 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4630 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4631 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4632 netdev_info(sdata->dev, 4633 "disabling HT/VHT due to WEP/TKIP use\n"); 4634 } 4635 } 4636 4637 if (req->flags & ASSOC_REQ_DISABLE_HT) { 4638 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4639 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4640 } 4641 4642 if (req->flags & ASSOC_REQ_DISABLE_VHT) 4643 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4644 4645 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 4646 sband = local->hw.wiphy->bands[req->bss->channel->band]; 4647 if (!sband->ht_cap.ht_supported || 4648 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4649 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4650 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4651 if (!bss->wmm_used && 4652 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4653 netdev_info(sdata->dev, 4654 "disabling HT as WMM/QoS is not supported by the AP\n"); 4655 } 4656 4657 /* disable VHT if we don't support it or the AP doesn't use WMM */ 4658 if (!sband->vht_cap.vht_supported || 4659 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4660 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4661 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4662 if (!bss->wmm_used && 4663 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4664 netdev_info(sdata->dev, 4665 "disabling VHT as WMM/QoS is not supported by the AP\n"); 4666 } 4667 4668 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 4669 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 4670 sizeof(ifmgd->ht_capa_mask)); 4671 4672 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 4673 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 4674 sizeof(ifmgd->vht_capa_mask)); 4675 4676 if (req->ie && req->ie_len) { 4677 memcpy(assoc_data->ie, req->ie, req->ie_len); 4678 assoc_data->ie_len = req->ie_len; 4679 } 4680 4681 assoc_data->bss = req->bss; 4682 4683 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 4684 if (ifmgd->powersave) 4685 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 4686 else 4687 sdata->smps_mode = IEEE80211_SMPS_OFF; 4688 } else 4689 sdata->smps_mode = ifmgd->req_smps; 4690 4691 assoc_data->capability = req->bss->capability; 4692 assoc_data->supp_rates = bss->supp_rates; 4693 assoc_data->supp_rates_len = bss->supp_rates_len; 4694 4695 rcu_read_lock(); 4696 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 4697 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 4698 assoc_data->ap_ht_param = 4699 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 4700 else 4701 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4702 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 4703 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 4704 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 4705 sizeof(struct ieee80211_vht_cap)); 4706 else 4707 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4708 rcu_read_unlock(); 4709 4710 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 4711 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 4712 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 4713 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 4714 4715 if (bss->wmm_used && bss->uapsd_supported && 4716 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 4717 assoc_data->uapsd = true; 4718 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 4719 } else { 4720 assoc_data->uapsd = false; 4721 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 4722 } 4723 4724 if (req->prev_bssid) 4725 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 4726 4727 if (req->use_mfp) { 4728 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 4729 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 4730 } else { 4731 ifmgd->mfp = IEEE80211_MFP_DISABLED; 4732 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 4733 } 4734 4735 if (req->flags & ASSOC_REQ_USE_RRM) 4736 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 4737 else 4738 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 4739 4740 if (req->crypto.control_port) 4741 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 4742 else 4743 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 4744 4745 sdata->control_port_protocol = req->crypto.control_port_ethertype; 4746 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 4747 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 4748 sdata->vif.type); 4749 4750 /* kick off associate process */ 4751 4752 ifmgd->assoc_data = assoc_data; 4753 ifmgd->dtim_period = 0; 4754 ifmgd->have_beacon = false; 4755 4756 err = ieee80211_prep_connection(sdata, req->bss, true); 4757 if (err) 4758 goto err_clear; 4759 4760 rcu_read_lock(); 4761 beacon_ies = rcu_dereference(req->bss->beacon_ies); 4762 4763 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC && 4764 !beacon_ies) { 4765 /* 4766 * Wait up to one beacon interval ... 4767 * should this be more if we miss one? 4768 */ 4769 sdata_info(sdata, "waiting for beacon from %pM\n", 4770 ifmgd->bssid); 4771 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 4772 assoc_data->timeout_started = true; 4773 assoc_data->need_beacon = true; 4774 } else if (beacon_ies) { 4775 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4776 beacon_ies->data, 4777 beacon_ies->len); 4778 u8 dtim_count = 0; 4779 4780 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 4781 const struct ieee80211_tim_ie *tim; 4782 tim = (void *)(tim_ie + 2); 4783 ifmgd->dtim_period = tim->dtim_period; 4784 dtim_count = tim->dtim_count; 4785 } 4786 ifmgd->have_beacon = true; 4787 assoc_data->timeout = jiffies; 4788 assoc_data->timeout_started = true; 4789 4790 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { 4791 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 4792 sdata->vif.bss_conf.sync_device_ts = 4793 bss->device_ts_beacon; 4794 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 4795 } 4796 } else { 4797 assoc_data->timeout = jiffies; 4798 assoc_data->timeout_started = true; 4799 } 4800 rcu_read_unlock(); 4801 4802 run_again(sdata, assoc_data->timeout); 4803 4804 if (bss->corrupt_data) { 4805 char *corrupt_type = "data"; 4806 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 4807 if (bss->corrupt_data & 4808 IEEE80211_BSS_CORRUPT_PROBE_RESP) 4809 corrupt_type = "beacon and probe response"; 4810 else 4811 corrupt_type = "beacon"; 4812 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 4813 corrupt_type = "probe response"; 4814 sdata_info(sdata, "associating with AP with corrupt %s\n", 4815 corrupt_type); 4816 } 4817 4818 return 0; 4819 err_clear: 4820 memset(ifmgd->bssid, 0, ETH_ALEN); 4821 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4822 ifmgd->assoc_data = NULL; 4823 err_free: 4824 kfree(assoc_data); 4825 return err; 4826 } 4827 4828 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 4829 struct cfg80211_deauth_request *req) 4830 { 4831 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4832 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4833 bool tx = !req->local_state_change; 4834 4835 if (ifmgd->auth_data && 4836 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 4837 sdata_info(sdata, 4838 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 4839 req->bssid, req->reason_code, 4840 ieee80211_get_reason_code_string(req->reason_code)); 4841 4842 drv_mgd_prepare_tx(sdata->local, sdata); 4843 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4844 IEEE80211_STYPE_DEAUTH, 4845 req->reason_code, tx, 4846 frame_buf); 4847 ieee80211_destroy_auth_data(sdata, false); 4848 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4849 IEEE80211_DEAUTH_FRAME_LEN); 4850 4851 return 0; 4852 } 4853 4854 if (ifmgd->associated && 4855 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 4856 sdata_info(sdata, 4857 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 4858 req->bssid, req->reason_code, 4859 ieee80211_get_reason_code_string(req->reason_code)); 4860 4861 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4862 req->reason_code, tx, frame_buf); 4863 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4864 IEEE80211_DEAUTH_FRAME_LEN); 4865 return 0; 4866 } 4867 4868 return -ENOTCONN; 4869 } 4870 4871 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 4872 struct cfg80211_disassoc_request *req) 4873 { 4874 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4875 u8 bssid[ETH_ALEN]; 4876 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4877 4878 /* 4879 * cfg80211 should catch this ... but it's racy since 4880 * we can receive a disassoc frame, process it, hand it 4881 * to cfg80211 while that's in a locked section already 4882 * trying to tell us that the user wants to disconnect. 4883 */ 4884 if (ifmgd->associated != req->bss) 4885 return -ENOLINK; 4886 4887 sdata_info(sdata, 4888 "disassociating from %pM by local choice (Reason: %u=%s)\n", 4889 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 4890 4891 memcpy(bssid, req->bss->bssid, ETH_ALEN); 4892 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 4893 req->reason_code, !req->local_state_change, 4894 frame_buf); 4895 4896 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4897 IEEE80211_DEAUTH_FRAME_LEN); 4898 4899 return 0; 4900 } 4901 4902 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 4903 { 4904 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4905 4906 /* 4907 * Make sure some work items will not run after this, 4908 * they will not do anything but might not have been 4909 * cancelled when disconnecting. 4910 */ 4911 cancel_work_sync(&ifmgd->monitor_work); 4912 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 4913 cancel_work_sync(&ifmgd->request_smps_work); 4914 cancel_work_sync(&ifmgd->csa_connection_drop_work); 4915 cancel_work_sync(&ifmgd->chswitch_work); 4916 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 4917 4918 sdata_lock(sdata); 4919 if (ifmgd->assoc_data) { 4920 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4921 ieee80211_destroy_assoc_data(sdata, false); 4922 cfg80211_assoc_timeout(sdata->dev, bss); 4923 } 4924 if (ifmgd->auth_data) 4925 ieee80211_destroy_auth_data(sdata, false); 4926 spin_lock_bh(&ifmgd->teardown_lock); 4927 if (ifmgd->teardown_skb) { 4928 kfree_skb(ifmgd->teardown_skb); 4929 ifmgd->teardown_skb = NULL; 4930 ifmgd->orig_teardown_skb = NULL; 4931 } 4932 spin_unlock_bh(&ifmgd->teardown_lock); 4933 del_timer_sync(&ifmgd->timer); 4934 sdata_unlock(sdata); 4935 } 4936 4937 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 4938 enum nl80211_cqm_rssi_threshold_event rssi_event, 4939 gfp_t gfp) 4940 { 4941 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4942 4943 trace_api_cqm_rssi_notify(sdata, rssi_event); 4944 4945 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); 4946 } 4947 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 4948 4949 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 4950 { 4951 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4952 4953 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 4954 4955 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 4956 } 4957 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 4958