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 u32 ht_cfreq, ret; 161 162 chandef->chan = channel; 163 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 164 chandef->center_freq1 = channel->center_freq; 165 chandef->center_freq2 = 0; 166 167 if (!ht_cap || !ht_oper || !sband->ht_cap.ht_supported) { 168 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 169 goto out; 170 } 171 172 chandef->width = NL80211_CHAN_WIDTH_20; 173 174 if (!(ht_cap->cap_info & 175 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) { 176 ret = IEEE80211_STA_DISABLE_40MHZ; 177 goto out; 178 } 179 180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 181 channel->band); 182 /* check that channel matches the right operating channel */ 183 if (!tracking && channel->center_freq != ht_cfreq) { 184 /* 185 * It's possible that some APs are confused here; 186 * Netgear WNDR3700 sometimes reports 4 higher than 187 * the actual channel in association responses, but 188 * since we look at probe response/beacon data here 189 * it should be OK. 190 */ 191 sdata_info(sdata, 192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 193 channel->center_freq, ht_cfreq, 194 ht_oper->primary_chan, channel->band); 195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 196 goto out; 197 } 198 199 /* check 40 MHz support, if we have it */ 200 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 201 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 202 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 203 chandef->width = NL80211_CHAN_WIDTH_40; 204 chandef->center_freq1 += 10; 205 break; 206 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 207 chandef->width = NL80211_CHAN_WIDTH_40; 208 chandef->center_freq1 -= 10; 209 break; 210 } 211 } else { 212 /* 40 MHz (and 80 MHz) must be supported for VHT */ 213 ret = IEEE80211_STA_DISABLE_VHT; 214 /* also mark 40 MHz disabled */ 215 ret |= IEEE80211_STA_DISABLE_40MHZ; 216 goto out; 217 } 218 219 if (!vht_oper || !sband->vht_cap.vht_supported) { 220 ret = IEEE80211_STA_DISABLE_VHT; 221 goto out; 222 } 223 224 vht_chandef.chan = channel; 225 vht_chandef.center_freq1 = 226 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx, 227 channel->band); 228 vht_chandef.center_freq2 = 0; 229 230 switch (vht_oper->chan_width) { 231 case IEEE80211_VHT_CHANWIDTH_USE_HT: 232 vht_chandef.width = chandef->width; 233 vht_chandef.center_freq1 = chandef->center_freq1; 234 break; 235 case IEEE80211_VHT_CHANWIDTH_80MHZ: 236 vht_chandef.width = NL80211_CHAN_WIDTH_80; 237 break; 238 case IEEE80211_VHT_CHANWIDTH_160MHZ: 239 vht_chandef.width = NL80211_CHAN_WIDTH_160; 240 break; 241 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 242 vht_chandef.width = NL80211_CHAN_WIDTH_80P80; 243 vht_chandef.center_freq2 = 244 ieee80211_channel_to_frequency( 245 vht_oper->center_freq_seg2_idx, 246 channel->band); 247 break; 248 default: 249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 250 sdata_info(sdata, 251 "AP VHT operation IE has invalid channel width (%d), disable VHT\n", 252 vht_oper->chan_width); 253 ret = IEEE80211_STA_DISABLE_VHT; 254 goto out; 255 } 256 257 if (!cfg80211_chandef_valid(&vht_chandef)) { 258 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 259 sdata_info(sdata, 260 "AP VHT information is invalid, disable VHT\n"); 261 ret = IEEE80211_STA_DISABLE_VHT; 262 goto out; 263 } 264 265 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 266 ret = 0; 267 goto out; 268 } 269 270 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 271 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 272 sdata_info(sdata, 273 "AP VHT information doesn't match HT, disable VHT\n"); 274 ret = IEEE80211_STA_DISABLE_VHT; 275 goto out; 276 } 277 278 *chandef = vht_chandef; 279 280 ret = 0; 281 282 out: 283 /* 284 * When tracking the current AP, don't do any further checks if the 285 * new chandef is identical to the one we're currently using for the 286 * connection. This keeps us from playing ping-pong with regulatory, 287 * without it the following can happen (for example): 288 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 289 * - AP advertises regdom US 290 * - CRDA loads regdom US with 80 MHz prohibited (old database) 291 * - the code below detects an unsupported channel, downgrades, and 292 * we disconnect from the AP in the caller 293 * - disconnect causes CRDA to reload world regdomain and the game 294 * starts anew. 295 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 296 * 297 * It seems possible that there are still scenarios with CSA or real 298 * bandwidth changes where a this could happen, but those cases are 299 * less common and wouldn't completely prevent using the AP. 300 */ 301 if (tracking && 302 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 303 return ret; 304 305 /* don't print the message below for VHT mismatch if VHT is disabled */ 306 if (ret & IEEE80211_STA_DISABLE_VHT) 307 vht_chandef = *chandef; 308 309 /* 310 * Ignore the DISABLED flag when we're already connected and only 311 * tracking the APs beacon for bandwidth changes - otherwise we 312 * might get disconnected here if we connect to an AP, update our 313 * regulatory information based on the AP's country IE and the 314 * information we have is wrong/outdated and disables the channel 315 * that we're actually using for the connection to the AP. 316 */ 317 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 318 tracking ? 0 : 319 IEEE80211_CHAN_DISABLED)) { 320 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 321 ret = IEEE80211_STA_DISABLE_HT | 322 IEEE80211_STA_DISABLE_VHT; 323 break; 324 } 325 326 ret |= ieee80211_chandef_downgrade(chandef); 327 } 328 329 if (chandef->width != vht_chandef.width && !tracking) 330 sdata_info(sdata, 331 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 332 333 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 334 return ret; 335 } 336 337 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 338 struct sta_info *sta, 339 const struct ieee80211_ht_cap *ht_cap, 340 const struct ieee80211_ht_operation *ht_oper, 341 const struct ieee80211_vht_operation *vht_oper, 342 const u8 *bssid, u32 *changed) 343 { 344 struct ieee80211_local *local = sdata->local; 345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 346 struct ieee80211_supported_band *sband; 347 struct ieee80211_channel *chan; 348 struct cfg80211_chan_def chandef; 349 u16 ht_opmode; 350 u32 flags; 351 enum ieee80211_sta_rx_bandwidth new_sta_bw; 352 int ret; 353 354 /* if HT was/is disabled, don't track any bandwidth changes */ 355 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 356 return 0; 357 358 /* don't check VHT if we associated as non-VHT station */ 359 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 360 vht_oper = NULL; 361 362 if (WARN_ON_ONCE(!sta)) 363 return -EINVAL; 364 365 /* 366 * if bss configuration changed store the new one - 367 * this may be applicable even if channel is identical 368 */ 369 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 370 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 371 *changed |= BSS_CHANGED_HT; 372 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 373 } 374 375 chan = sdata->vif.bss_conf.chandef.chan; 376 sband = local->hw.wiphy->bands[chan->band]; 377 378 /* calculate new channel (type) based on HT/VHT operation IEs */ 379 flags = ieee80211_determine_chantype(sdata, sband, chan, 380 ht_cap, ht_oper, vht_oper, 381 &chandef, true); 382 383 /* 384 * Downgrade the new channel if we associated with restricted 385 * capabilities. For example, if we associated as a 20 MHz STA 386 * to a 40 MHz AP (due to regulatory, capabilities or config 387 * reasons) then switching to a 40 MHz channel now won't do us 388 * any good -- we couldn't use it with the AP. 389 */ 390 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 391 chandef.width == NL80211_CHAN_WIDTH_80P80) 392 flags |= ieee80211_chandef_downgrade(&chandef); 393 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 394 chandef.width == NL80211_CHAN_WIDTH_160) 395 flags |= ieee80211_chandef_downgrade(&chandef); 396 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 397 chandef.width > NL80211_CHAN_WIDTH_20) 398 flags |= ieee80211_chandef_downgrade(&chandef); 399 400 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 401 return 0; 402 403 sdata_info(sdata, 404 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 405 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 406 chandef.center_freq1, chandef.center_freq2); 407 408 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 409 IEEE80211_STA_DISABLE_VHT | 410 IEEE80211_STA_DISABLE_40MHZ | 411 IEEE80211_STA_DISABLE_80P80MHZ | 412 IEEE80211_STA_DISABLE_160MHZ)) || 413 !cfg80211_chandef_valid(&chandef)) { 414 sdata_info(sdata, 415 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 416 ifmgd->bssid); 417 return -EINVAL; 418 } 419 420 switch (chandef.width) { 421 case NL80211_CHAN_WIDTH_20_NOHT: 422 case NL80211_CHAN_WIDTH_20: 423 new_sta_bw = IEEE80211_STA_RX_BW_20; 424 break; 425 case NL80211_CHAN_WIDTH_40: 426 new_sta_bw = IEEE80211_STA_RX_BW_40; 427 break; 428 case NL80211_CHAN_WIDTH_80: 429 new_sta_bw = IEEE80211_STA_RX_BW_80; 430 break; 431 case NL80211_CHAN_WIDTH_80P80: 432 case NL80211_CHAN_WIDTH_160: 433 new_sta_bw = IEEE80211_STA_RX_BW_160; 434 break; 435 default: 436 return -EINVAL; 437 } 438 439 if (new_sta_bw > sta->cur_max_bandwidth) 440 new_sta_bw = sta->cur_max_bandwidth; 441 442 if (new_sta_bw < sta->sta.bandwidth) { 443 sta->sta.bandwidth = new_sta_bw; 444 rate_control_rate_update(local, sband, sta, 445 IEEE80211_RC_BW_CHANGED); 446 } 447 448 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 449 if (ret) { 450 sdata_info(sdata, 451 "AP %pM changed bandwidth to incompatible one - disconnect\n", 452 ifmgd->bssid); 453 return ret; 454 } 455 456 if (new_sta_bw > sta->sta.bandwidth) { 457 sta->sta.bandwidth = new_sta_bw; 458 rate_control_rate_update(local, sband, sta, 459 IEEE80211_RC_BW_CHANGED); 460 } 461 462 return 0; 463 } 464 465 /* frame sending functions */ 466 467 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 468 struct sk_buff *skb, u8 ap_ht_param, 469 struct ieee80211_supported_band *sband, 470 struct ieee80211_channel *channel, 471 enum ieee80211_smps_mode smps) 472 { 473 u8 *pos; 474 u32 flags = channel->flags; 475 u16 cap; 476 struct ieee80211_sta_ht_cap ht_cap; 477 478 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 479 480 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 481 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 482 483 /* determine capability flags */ 484 cap = ht_cap.cap; 485 486 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 487 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 488 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 489 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 490 cap &= ~IEEE80211_HT_CAP_SGI_40; 491 } 492 break; 493 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 494 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 496 cap &= ~IEEE80211_HT_CAP_SGI_40; 497 } 498 break; 499 } 500 501 /* 502 * If 40 MHz was disabled associate as though we weren't 503 * capable of 40 MHz -- some broken APs will never fall 504 * back to trying to transmit in 20 MHz. 505 */ 506 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 507 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 508 cap &= ~IEEE80211_HT_CAP_SGI_40; 509 } 510 511 /* set SM PS mode properly */ 512 cap &= ~IEEE80211_HT_CAP_SM_PS; 513 switch (smps) { 514 case IEEE80211_SMPS_AUTOMATIC: 515 case IEEE80211_SMPS_NUM_MODES: 516 WARN_ON(1); 517 case IEEE80211_SMPS_OFF: 518 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 519 IEEE80211_HT_CAP_SM_PS_SHIFT; 520 break; 521 case IEEE80211_SMPS_STATIC: 522 cap |= WLAN_HT_CAP_SM_PS_STATIC << 523 IEEE80211_HT_CAP_SM_PS_SHIFT; 524 break; 525 case IEEE80211_SMPS_DYNAMIC: 526 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 527 IEEE80211_HT_CAP_SM_PS_SHIFT; 528 break; 529 } 530 531 /* reserve and fill IE */ 532 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 533 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 534 } 535 536 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 537 struct sk_buff *skb, 538 struct ieee80211_supported_band *sband, 539 struct ieee80211_vht_cap *ap_vht_cap) 540 { 541 u8 *pos; 542 u32 cap; 543 struct ieee80211_sta_vht_cap vht_cap; 544 u32 mask, ap_bf_sts, our_bf_sts; 545 546 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 547 548 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 549 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 550 551 /* determine capability flags */ 552 cap = vht_cap.cap; 553 554 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 555 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ; 556 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 557 } 558 559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 560 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 561 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 562 } 563 564 /* 565 * Some APs apparently get confused if our capabilities are better 566 * than theirs, so restrict what we advertise in the assoc request. 567 */ 568 if (!(ap_vht_cap->vht_cap_info & 569 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 570 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE; 571 572 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 573 574 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 575 our_bf_sts = cap & mask; 576 577 if (ap_bf_sts < our_bf_sts) { 578 cap &= ~mask; 579 cap |= ap_bf_sts; 580 } 581 582 /* reserve and fill IE */ 583 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 584 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 585 } 586 587 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 588 { 589 struct ieee80211_local *local = sdata->local; 590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 591 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 592 struct sk_buff *skb; 593 struct ieee80211_mgmt *mgmt; 594 u8 *pos, qos_info; 595 size_t offset = 0, noffset; 596 int i, count, rates_len, supp_rates_len, shift; 597 u16 capab; 598 struct ieee80211_supported_band *sband; 599 struct ieee80211_chanctx_conf *chanctx_conf; 600 struct ieee80211_channel *chan; 601 u32 rate_flags, rates = 0; 602 603 sdata_assert_lock(sdata); 604 605 rcu_read_lock(); 606 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 607 if (WARN_ON(!chanctx_conf)) { 608 rcu_read_unlock(); 609 return; 610 } 611 chan = chanctx_conf->def.chan; 612 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 613 rcu_read_unlock(); 614 sband = local->hw.wiphy->bands[chan->band]; 615 shift = ieee80211_vif_get_shift(&sdata->vif); 616 617 if (assoc_data->supp_rates_len) { 618 /* 619 * Get all rates supported by the device and the AP as 620 * some APs don't like getting a superset of their rates 621 * in the association request (e.g. D-Link DAP 1353 in 622 * b-only mode)... 623 */ 624 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 625 assoc_data->supp_rates, 626 assoc_data->supp_rates_len, 627 &rates); 628 } else { 629 /* 630 * In case AP not provide any supported rates information 631 * before association, we send information element(s) with 632 * all rates that we support. 633 */ 634 rates_len = 0; 635 for (i = 0; i < sband->n_bitrates; i++) { 636 if ((rate_flags & sband->bitrates[i].flags) 637 != rate_flags) 638 continue; 639 rates |= BIT(i); 640 rates_len++; 641 } 642 } 643 644 skb = alloc_skb(local->hw.extra_tx_headroom + 645 sizeof(*mgmt) + /* bit too much but doesn't matter */ 646 2 + assoc_data->ssid_len + /* SSID */ 647 4 + rates_len + /* (extended) rates */ 648 4 + /* power capability */ 649 2 + 2 * sband->n_channels + /* supported channels */ 650 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 651 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 652 assoc_data->ie_len + /* extra IEs */ 653 9, /* WMM */ 654 GFP_KERNEL); 655 if (!skb) 656 return; 657 658 skb_reserve(skb, local->hw.extra_tx_headroom); 659 660 capab = WLAN_CAPABILITY_ESS; 661 662 if (sband->band == IEEE80211_BAND_2GHZ) { 663 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) 664 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 665 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) 666 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 667 } 668 669 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 670 capab |= WLAN_CAPABILITY_PRIVACY; 671 672 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 673 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) 674 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 675 676 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 677 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 678 679 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); 680 memset(mgmt, 0, 24); 681 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 682 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 683 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 684 685 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 686 skb_put(skb, 10); 687 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 688 IEEE80211_STYPE_REASSOC_REQ); 689 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 690 mgmt->u.reassoc_req.listen_interval = 691 cpu_to_le16(local->hw.conf.listen_interval); 692 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 693 ETH_ALEN); 694 } else { 695 skb_put(skb, 4); 696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 697 IEEE80211_STYPE_ASSOC_REQ); 698 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 699 mgmt->u.assoc_req.listen_interval = 700 cpu_to_le16(local->hw.conf.listen_interval); 701 } 702 703 /* SSID */ 704 pos = skb_put(skb, 2 + assoc_data->ssid_len); 705 *pos++ = WLAN_EID_SSID; 706 *pos++ = assoc_data->ssid_len; 707 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 708 709 /* add all rates which were marked to be used above */ 710 supp_rates_len = rates_len; 711 if (supp_rates_len > 8) 712 supp_rates_len = 8; 713 714 pos = skb_put(skb, supp_rates_len + 2); 715 *pos++ = WLAN_EID_SUPP_RATES; 716 *pos++ = supp_rates_len; 717 718 count = 0; 719 for (i = 0; i < sband->n_bitrates; i++) { 720 if (BIT(i) & rates) { 721 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 722 5 * (1 << shift)); 723 *pos++ = (u8) rate; 724 if (++count == 8) 725 break; 726 } 727 } 728 729 if (rates_len > count) { 730 pos = skb_put(skb, rates_len - count + 2); 731 *pos++ = WLAN_EID_EXT_SUPP_RATES; 732 *pos++ = rates_len - count; 733 734 for (i++; i < sband->n_bitrates; i++) { 735 if (BIT(i) & rates) { 736 int rate; 737 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 738 5 * (1 << shift)); 739 *pos++ = (u8) rate; 740 } 741 } 742 } 743 744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 745 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 746 pos = skb_put(skb, 4); 747 *pos++ = WLAN_EID_PWR_CAPABILITY; 748 *pos++ = 2; 749 *pos++ = 0; /* min tx power */ 750 /* max tx power */ 751 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 752 } 753 754 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 755 /* TODO: get this in reg domain format */ 756 pos = skb_put(skb, 2 * sband->n_channels + 2); 757 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 758 *pos++ = 2 * sband->n_channels; 759 for (i = 0; i < sband->n_channels; i++) { 760 *pos++ = ieee80211_frequency_to_channel( 761 sband->channels[i].center_freq); 762 *pos++ = 1; /* one channel in the subband*/ 763 } 764 } 765 766 /* if present, add any custom IEs that go before HT */ 767 if (assoc_data->ie_len) { 768 static const u8 before_ht[] = { 769 WLAN_EID_SSID, 770 WLAN_EID_SUPP_RATES, 771 WLAN_EID_EXT_SUPP_RATES, 772 WLAN_EID_PWR_CAPABILITY, 773 WLAN_EID_SUPPORTED_CHANNELS, 774 WLAN_EID_RSN, 775 WLAN_EID_QOS_CAPA, 776 WLAN_EID_RRM_ENABLED_CAPABILITIES, 777 WLAN_EID_MOBILITY_DOMAIN, 778 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 779 }; 780 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 781 before_ht, ARRAY_SIZE(before_ht), 782 offset); 783 pos = skb_put(skb, noffset - offset); 784 memcpy(pos, assoc_data->ie + offset, noffset - offset); 785 offset = noffset; 786 } 787 788 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 789 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 790 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 791 792 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 793 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 794 sband, chan, sdata->smps_mode); 795 796 /* if present, add any custom IEs that go before VHT */ 797 if (assoc_data->ie_len) { 798 static const u8 before_vht[] = { 799 WLAN_EID_SSID, 800 WLAN_EID_SUPP_RATES, 801 WLAN_EID_EXT_SUPP_RATES, 802 WLAN_EID_PWR_CAPABILITY, 803 WLAN_EID_SUPPORTED_CHANNELS, 804 WLAN_EID_RSN, 805 WLAN_EID_QOS_CAPA, 806 WLAN_EID_RRM_ENABLED_CAPABILITIES, 807 WLAN_EID_MOBILITY_DOMAIN, 808 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 809 WLAN_EID_HT_CAPABILITY, 810 WLAN_EID_BSS_COEX_2040, 811 WLAN_EID_EXT_CAPABILITY, 812 WLAN_EID_QOS_TRAFFIC_CAPA, 813 WLAN_EID_TIM_BCAST_REQ, 814 WLAN_EID_INTERWORKING, 815 }; 816 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 817 before_vht, ARRAY_SIZE(before_vht), 818 offset); 819 pos = skb_put(skb, noffset - offset); 820 memcpy(pos, assoc_data->ie + offset, noffset - offset); 821 offset = noffset; 822 } 823 824 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 825 ieee80211_add_vht_ie(sdata, skb, sband, 826 &assoc_data->ap_vht_cap); 827 828 /* if present, add any custom non-vendor IEs that go after HT */ 829 if (assoc_data->ie_len) { 830 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 831 assoc_data->ie_len, 832 offset); 833 pos = skb_put(skb, noffset - offset); 834 memcpy(pos, assoc_data->ie + offset, noffset - offset); 835 offset = noffset; 836 } 837 838 if (assoc_data->wmm) { 839 if (assoc_data->uapsd) { 840 qos_info = ifmgd->uapsd_queues; 841 qos_info |= (ifmgd->uapsd_max_sp_len << 842 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 843 } else { 844 qos_info = 0; 845 } 846 847 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 848 } 849 850 /* add any remaining custom (i.e. vendor specific here) IEs */ 851 if (assoc_data->ie_len) { 852 noffset = assoc_data->ie_len; 853 pos = skb_put(skb, noffset - offset); 854 memcpy(pos, assoc_data->ie + offset, noffset - offset); 855 } 856 857 drv_mgd_prepare_tx(local, sdata); 858 859 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 860 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 861 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 862 IEEE80211_TX_INTFL_MLME_CONN_TX; 863 ieee80211_tx_skb(sdata, skb); 864 } 865 866 void ieee80211_send_pspoll(struct ieee80211_local *local, 867 struct ieee80211_sub_if_data *sdata) 868 { 869 struct ieee80211_pspoll *pspoll; 870 struct sk_buff *skb; 871 872 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 873 if (!skb) 874 return; 875 876 pspoll = (struct ieee80211_pspoll *) skb->data; 877 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 878 879 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 880 ieee80211_tx_skb(sdata, skb); 881 } 882 883 void ieee80211_send_nullfunc(struct ieee80211_local *local, 884 struct ieee80211_sub_if_data *sdata, 885 int powersave) 886 { 887 struct sk_buff *skb; 888 struct ieee80211_hdr_3addr *nullfunc; 889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 890 891 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); 892 if (!skb) 893 return; 894 895 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 896 if (powersave) 897 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 898 899 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 900 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 901 902 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 903 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 904 905 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 906 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 907 908 ieee80211_tx_skb(sdata, skb); 909 } 910 911 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 912 struct ieee80211_sub_if_data *sdata) 913 { 914 struct sk_buff *skb; 915 struct ieee80211_hdr *nullfunc; 916 __le16 fc; 917 918 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 919 return; 920 921 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 922 if (!skb) 923 return; 924 925 skb_reserve(skb, local->hw.extra_tx_headroom); 926 927 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); 928 memset(nullfunc, 0, 30); 929 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 930 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 931 nullfunc->frame_control = fc; 932 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 933 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 934 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 935 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 936 937 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 938 ieee80211_tx_skb(sdata, skb); 939 } 940 941 /* spectrum management related things */ 942 static void ieee80211_chswitch_work(struct work_struct *work) 943 { 944 struct ieee80211_sub_if_data *sdata = 945 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 946 struct ieee80211_local *local = sdata->local; 947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 948 int ret; 949 950 if (!ieee80211_sdata_running(sdata)) 951 return; 952 953 sdata_lock(sdata); 954 mutex_lock(&local->mtx); 955 mutex_lock(&local->chanctx_mtx); 956 957 if (!ifmgd->associated) 958 goto out; 959 960 if (!sdata->vif.csa_active) 961 goto out; 962 963 /* 964 * using reservation isn't immediate as it may be deferred until later 965 * with multi-vif. once reservation is complete it will re-schedule the 966 * work with no reserved_chanctx so verify chandef to check if it 967 * completed successfully 968 */ 969 970 if (sdata->reserved_chanctx) { 971 /* 972 * with multi-vif csa driver may call ieee80211_csa_finish() 973 * many times while waiting for other interfaces to use their 974 * reservations 975 */ 976 if (sdata->reserved_ready) 977 goto out; 978 979 ret = ieee80211_vif_use_reserved_context(sdata); 980 if (ret) { 981 sdata_info(sdata, 982 "failed to use reserved channel context, disconnecting (err=%d)\n", 983 ret); 984 ieee80211_queue_work(&sdata->local->hw, 985 &ifmgd->csa_connection_drop_work); 986 goto out; 987 } 988 989 goto out; 990 } 991 992 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 993 &sdata->csa_chandef)) { 994 sdata_info(sdata, 995 "failed to finalize channel switch, disconnecting\n"); 996 ieee80211_queue_work(&sdata->local->hw, 997 &ifmgd->csa_connection_drop_work); 998 goto out; 999 } 1000 1001 /* XXX: shouldn't really modify cfg80211-owned data! */ 1002 ifmgd->associated->channel = sdata->csa_chandef.chan; 1003 1004 sdata->vif.csa_active = false; 1005 1006 /* XXX: wait for a beacon first? */ 1007 if (sdata->csa_block_tx) { 1008 ieee80211_wake_vif_queues(local, sdata, 1009 IEEE80211_QUEUE_STOP_REASON_CSA); 1010 sdata->csa_block_tx = false; 1011 } 1012 1013 ieee80211_sta_reset_beacon_monitor(sdata); 1014 ieee80211_sta_reset_conn_monitor(sdata); 1015 1016 out: 1017 mutex_unlock(&local->chanctx_mtx); 1018 mutex_unlock(&local->mtx); 1019 sdata_unlock(sdata); 1020 } 1021 1022 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1023 { 1024 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1026 1027 trace_api_chswitch_done(sdata, success); 1028 if (!success) { 1029 sdata_info(sdata, 1030 "driver channel switch failed, disconnecting\n"); 1031 ieee80211_queue_work(&sdata->local->hw, 1032 &ifmgd->csa_connection_drop_work); 1033 } else { 1034 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1035 } 1036 } 1037 EXPORT_SYMBOL(ieee80211_chswitch_done); 1038 1039 static void ieee80211_chswitch_timer(unsigned long data) 1040 { 1041 struct ieee80211_sub_if_data *sdata = 1042 (struct ieee80211_sub_if_data *) data; 1043 1044 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1045 } 1046 1047 static void 1048 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1049 u64 timestamp, struct ieee802_11_elems *elems, 1050 bool beacon) 1051 { 1052 struct ieee80211_local *local = sdata->local; 1053 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1054 struct cfg80211_bss *cbss = ifmgd->associated; 1055 struct ieee80211_chanctx_conf *conf; 1056 struct ieee80211_chanctx *chanctx; 1057 enum ieee80211_band current_band; 1058 struct ieee80211_csa_ie csa_ie; 1059 int res; 1060 1061 sdata_assert_lock(sdata); 1062 1063 if (!cbss) 1064 return; 1065 1066 if (local->scanning) 1067 return; 1068 1069 /* disregard subsequent announcements if we are already processing */ 1070 if (sdata->vif.csa_active) 1071 return; 1072 1073 current_band = cbss->channel->band; 1074 memset(&csa_ie, 0, sizeof(csa_ie)); 1075 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1076 ifmgd->flags, 1077 ifmgd->associated->bssid, &csa_ie); 1078 if (res < 0) 1079 ieee80211_queue_work(&local->hw, 1080 &ifmgd->csa_connection_drop_work); 1081 if (res) 1082 return; 1083 1084 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1085 IEEE80211_CHAN_DISABLED)) { 1086 sdata_info(sdata, 1087 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1088 ifmgd->associated->bssid, 1089 csa_ie.chandef.chan->center_freq, 1090 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1091 csa_ie.chandef.center_freq2); 1092 ieee80211_queue_work(&local->hw, 1093 &ifmgd->csa_connection_drop_work); 1094 return; 1095 } 1096 1097 mutex_lock(&local->mtx); 1098 mutex_lock(&local->chanctx_mtx); 1099 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1100 lockdep_is_held(&local->chanctx_mtx)); 1101 if (!conf) { 1102 sdata_info(sdata, 1103 "no channel context assigned to vif?, disconnecting\n"); 1104 ieee80211_queue_work(&local->hw, 1105 &ifmgd->csa_connection_drop_work); 1106 mutex_unlock(&local->chanctx_mtx); 1107 mutex_unlock(&local->mtx); 1108 return; 1109 } 1110 1111 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1112 1113 if (local->use_chanctx) { 1114 u32 num_chanctx = 0; 1115 list_for_each_entry(chanctx, &local->chanctx_list, list) 1116 num_chanctx++; 1117 1118 if (num_chanctx > 1 || 1119 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) { 1120 sdata_info(sdata, 1121 "not handling chan-switch with channel contexts\n"); 1122 ieee80211_queue_work(&local->hw, 1123 &ifmgd->csa_connection_drop_work); 1124 mutex_unlock(&local->chanctx_mtx); 1125 mutex_unlock(&local->mtx); 1126 return; 1127 } 1128 } 1129 1130 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1131 chanctx->mode, false); 1132 if (res) { 1133 sdata_info(sdata, 1134 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1135 res); 1136 ieee80211_queue_work(&local->hw, 1137 &ifmgd->csa_connection_drop_work); 1138 mutex_unlock(&local->chanctx_mtx); 1139 mutex_unlock(&local->mtx); 1140 return; 1141 } 1142 mutex_unlock(&local->chanctx_mtx); 1143 1144 sdata->vif.csa_active = true; 1145 sdata->csa_chandef = csa_ie.chandef; 1146 sdata->csa_block_tx = csa_ie.mode; 1147 1148 if (sdata->csa_block_tx) 1149 ieee80211_stop_vif_queues(local, sdata, 1150 IEEE80211_QUEUE_STOP_REASON_CSA); 1151 mutex_unlock(&local->mtx); 1152 1153 if (local->ops->channel_switch) { 1154 /* use driver's channel switch callback */ 1155 struct ieee80211_channel_switch ch_switch = { 1156 .timestamp = timestamp, 1157 .block_tx = csa_ie.mode, 1158 .chandef = csa_ie.chandef, 1159 .count = csa_ie.count, 1160 }; 1161 1162 drv_channel_switch(local, &ch_switch); 1163 return; 1164 } 1165 1166 /* channel switch handled in software */ 1167 if (csa_ie.count <= 1) 1168 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1169 else 1170 mod_timer(&ifmgd->chswitch_timer, 1171 TU_TO_EXP_TIME((csa_ie.count - 1) * 1172 cbss->beacon_interval)); 1173 } 1174 1175 static bool 1176 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1177 struct ieee80211_channel *channel, 1178 const u8 *country_ie, u8 country_ie_len, 1179 const u8 *pwr_constr_elem, 1180 int *chan_pwr, int *pwr_reduction) 1181 { 1182 struct ieee80211_country_ie_triplet *triplet; 1183 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1184 int i, chan_increment; 1185 bool have_chan_pwr = false; 1186 1187 /* Invalid IE */ 1188 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1189 return false; 1190 1191 triplet = (void *)(country_ie + 3); 1192 country_ie_len -= 3; 1193 1194 switch (channel->band) { 1195 default: 1196 WARN_ON_ONCE(1); 1197 /* fall through */ 1198 case IEEE80211_BAND_2GHZ: 1199 case IEEE80211_BAND_60GHZ: 1200 chan_increment = 1; 1201 break; 1202 case IEEE80211_BAND_5GHZ: 1203 chan_increment = 4; 1204 break; 1205 } 1206 1207 /* find channel */ 1208 while (country_ie_len >= 3) { 1209 u8 first_channel = triplet->chans.first_channel; 1210 1211 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1212 goto next; 1213 1214 for (i = 0; i < triplet->chans.num_channels; i++) { 1215 if (first_channel + i * chan_increment == chan) { 1216 have_chan_pwr = true; 1217 *chan_pwr = triplet->chans.max_power; 1218 break; 1219 } 1220 } 1221 if (have_chan_pwr) 1222 break; 1223 1224 next: 1225 triplet++; 1226 country_ie_len -= 3; 1227 } 1228 1229 if (have_chan_pwr) 1230 *pwr_reduction = *pwr_constr_elem; 1231 return have_chan_pwr; 1232 } 1233 1234 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1235 struct ieee80211_channel *channel, 1236 const u8 *cisco_dtpc_ie, 1237 int *pwr_level) 1238 { 1239 /* From practical testing, the first data byte of the DTPC element 1240 * seems to contain the requested dBm level, and the CLI on Cisco 1241 * APs clearly state the range is -127 to 127 dBm, which indicates 1242 * a signed byte, although it seemingly never actually goes negative. 1243 * The other byte seems to always be zero. 1244 */ 1245 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1246 } 1247 1248 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1249 struct ieee80211_channel *channel, 1250 struct ieee80211_mgmt *mgmt, 1251 const u8 *country_ie, u8 country_ie_len, 1252 const u8 *pwr_constr_ie, 1253 const u8 *cisco_dtpc_ie) 1254 { 1255 bool has_80211h_pwr = false, has_cisco_pwr = false; 1256 int chan_pwr = 0, pwr_reduction_80211h = 0; 1257 int pwr_level_cisco, pwr_level_80211h; 1258 int new_ap_level; 1259 1260 if (country_ie && pwr_constr_ie && 1261 mgmt->u.probe_resp.capab_info & 1262 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) { 1263 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1264 sdata, channel, country_ie, country_ie_len, 1265 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1266 pwr_level_80211h = 1267 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1268 } 1269 1270 if (cisco_dtpc_ie) { 1271 ieee80211_find_cisco_dtpc( 1272 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1273 has_cisco_pwr = true; 1274 } 1275 1276 if (!has_80211h_pwr && !has_cisco_pwr) 1277 return 0; 1278 1279 /* If we have both 802.11h and Cisco DTPC, apply both limits 1280 * by picking the smallest of the two power levels advertised. 1281 */ 1282 if (has_80211h_pwr && 1283 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1284 sdata_info(sdata, 1285 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1286 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1287 sdata->u.mgd.bssid); 1288 new_ap_level = pwr_level_80211h; 1289 } else { /* has_cisco_pwr is always true here. */ 1290 sdata_info(sdata, 1291 "Limiting TX power to %d dBm as advertised by %pM\n", 1292 pwr_level_cisco, sdata->u.mgd.bssid); 1293 new_ap_level = pwr_level_cisco; 1294 } 1295 1296 if (sdata->ap_power_level == new_ap_level) 1297 return 0; 1298 1299 sdata->ap_power_level = new_ap_level; 1300 if (__ieee80211_recalc_txpower(sdata)) 1301 return BSS_CHANGED_TXPOWER; 1302 return 0; 1303 } 1304 1305 /* powersave */ 1306 static void ieee80211_enable_ps(struct ieee80211_local *local, 1307 struct ieee80211_sub_if_data *sdata) 1308 { 1309 struct ieee80211_conf *conf = &local->hw.conf; 1310 1311 /* 1312 * If we are scanning right now then the parameters will 1313 * take effect when scan finishes. 1314 */ 1315 if (local->scanning) 1316 return; 1317 1318 if (conf->dynamic_ps_timeout > 0 && 1319 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { 1320 mod_timer(&local->dynamic_ps_timer, jiffies + 1321 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1322 } else { 1323 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) 1324 ieee80211_send_nullfunc(local, sdata, 1); 1325 1326 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && 1327 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) 1328 return; 1329 1330 conf->flags |= IEEE80211_CONF_PS; 1331 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1332 } 1333 } 1334 1335 static void ieee80211_change_ps(struct ieee80211_local *local) 1336 { 1337 struct ieee80211_conf *conf = &local->hw.conf; 1338 1339 if (local->ps_sdata) { 1340 ieee80211_enable_ps(local, local->ps_sdata); 1341 } else if (conf->flags & IEEE80211_CONF_PS) { 1342 conf->flags &= ~IEEE80211_CONF_PS; 1343 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1344 del_timer_sync(&local->dynamic_ps_timer); 1345 cancel_work_sync(&local->dynamic_ps_enable_work); 1346 } 1347 } 1348 1349 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1350 { 1351 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1352 struct sta_info *sta = NULL; 1353 bool authorized = false; 1354 1355 if (!mgd->powersave) 1356 return false; 1357 1358 if (mgd->broken_ap) 1359 return false; 1360 1361 if (!mgd->associated) 1362 return false; 1363 1364 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1365 return false; 1366 1367 if (!mgd->have_beacon) 1368 return false; 1369 1370 rcu_read_lock(); 1371 sta = sta_info_get(sdata, mgd->bssid); 1372 if (sta) 1373 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1374 rcu_read_unlock(); 1375 1376 return authorized; 1377 } 1378 1379 /* need to hold RTNL or interface lock */ 1380 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) 1381 { 1382 struct ieee80211_sub_if_data *sdata, *found = NULL; 1383 int count = 0; 1384 int timeout; 1385 1386 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { 1387 local->ps_sdata = NULL; 1388 return; 1389 } 1390 1391 list_for_each_entry(sdata, &local->interfaces, list) { 1392 if (!ieee80211_sdata_running(sdata)) 1393 continue; 1394 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1395 /* If an AP vif is found, then disable PS 1396 * by setting the count to zero thereby setting 1397 * ps_sdata to NULL. 1398 */ 1399 count = 0; 1400 break; 1401 } 1402 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1403 continue; 1404 found = sdata; 1405 count++; 1406 } 1407 1408 if (count == 1 && ieee80211_powersave_allowed(found)) { 1409 s32 beaconint_us; 1410 1411 if (latency < 0) 1412 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY); 1413 1414 beaconint_us = ieee80211_tu_to_usec( 1415 found->vif.bss_conf.beacon_int); 1416 1417 timeout = local->dynamic_ps_forced_timeout; 1418 if (timeout < 0) { 1419 /* 1420 * Go to full PSM if the user configures a very low 1421 * latency requirement. 1422 * The 2000 second value is there for compatibility 1423 * until the PM_QOS_NETWORK_LATENCY is configured 1424 * with real values. 1425 */ 1426 if (latency > (1900 * USEC_PER_MSEC) && 1427 latency != (2000 * USEC_PER_SEC)) 1428 timeout = 0; 1429 else 1430 timeout = 100; 1431 } 1432 local->hw.conf.dynamic_ps_timeout = timeout; 1433 1434 if (beaconint_us > latency) { 1435 local->ps_sdata = NULL; 1436 } else { 1437 int maxslp = 1; 1438 u8 dtimper = found->u.mgd.dtim_period; 1439 1440 /* If the TIM IE is invalid, pretend the value is 1 */ 1441 if (!dtimper) 1442 dtimper = 1; 1443 else if (dtimper > 1) 1444 maxslp = min_t(int, dtimper, 1445 latency / beaconint_us); 1446 1447 local->hw.conf.max_sleep_period = maxslp; 1448 local->hw.conf.ps_dtim_period = dtimper; 1449 local->ps_sdata = found; 1450 } 1451 } else { 1452 local->ps_sdata = NULL; 1453 } 1454 1455 ieee80211_change_ps(local); 1456 } 1457 1458 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1459 { 1460 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1461 1462 if (sdata->vif.bss_conf.ps != ps_allowed) { 1463 sdata->vif.bss_conf.ps = ps_allowed; 1464 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1465 } 1466 } 1467 1468 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1469 { 1470 struct ieee80211_local *local = 1471 container_of(work, struct ieee80211_local, 1472 dynamic_ps_disable_work); 1473 1474 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1475 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1476 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1477 } 1478 1479 ieee80211_wake_queues_by_reason(&local->hw, 1480 IEEE80211_MAX_QUEUE_MAP, 1481 IEEE80211_QUEUE_STOP_REASON_PS, 1482 false); 1483 } 1484 1485 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1486 { 1487 struct ieee80211_local *local = 1488 container_of(work, struct ieee80211_local, 1489 dynamic_ps_enable_work); 1490 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1491 struct ieee80211_if_managed *ifmgd; 1492 unsigned long flags; 1493 int q; 1494 1495 /* can only happen when PS was just disabled anyway */ 1496 if (!sdata) 1497 return; 1498 1499 ifmgd = &sdata->u.mgd; 1500 1501 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1502 return; 1503 1504 if (local->hw.conf.dynamic_ps_timeout > 0) { 1505 /* don't enter PS if TX frames are pending */ 1506 if (drv_tx_frames_pending(local)) { 1507 mod_timer(&local->dynamic_ps_timer, jiffies + 1508 msecs_to_jiffies( 1509 local->hw.conf.dynamic_ps_timeout)); 1510 return; 1511 } 1512 1513 /* 1514 * transmission can be stopped by others which leads to 1515 * dynamic_ps_timer expiry. Postpone the ps timer if it 1516 * is not the actual idle state. 1517 */ 1518 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1519 for (q = 0; q < local->hw.queues; q++) { 1520 if (local->queue_stop_reasons[q]) { 1521 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1522 flags); 1523 mod_timer(&local->dynamic_ps_timer, jiffies + 1524 msecs_to_jiffies( 1525 local->hw.conf.dynamic_ps_timeout)); 1526 return; 1527 } 1528 } 1529 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1530 } 1531 1532 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && 1533 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1534 if (drv_tx_frames_pending(local)) { 1535 mod_timer(&local->dynamic_ps_timer, jiffies + 1536 msecs_to_jiffies( 1537 local->hw.conf.dynamic_ps_timeout)); 1538 } else { 1539 ieee80211_send_nullfunc(local, sdata, 1); 1540 /* Flush to get the tx status of nullfunc frame */ 1541 ieee80211_flush_queues(local, sdata); 1542 } 1543 } 1544 1545 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && 1546 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) || 1547 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1548 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1549 local->hw.conf.flags |= IEEE80211_CONF_PS; 1550 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1551 } 1552 } 1553 1554 void ieee80211_dynamic_ps_timer(unsigned long data) 1555 { 1556 struct ieee80211_local *local = (void *) data; 1557 1558 if (local->quiescing || local->suspended) 1559 return; 1560 1561 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1562 } 1563 1564 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1565 { 1566 struct delayed_work *delayed_work = 1567 container_of(work, struct delayed_work, work); 1568 struct ieee80211_sub_if_data *sdata = 1569 container_of(delayed_work, struct ieee80211_sub_if_data, 1570 dfs_cac_timer_work); 1571 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1572 1573 mutex_lock(&sdata->local->mtx); 1574 if (sdata->wdev.cac_started) { 1575 ieee80211_vif_release_channel(sdata); 1576 cfg80211_cac_event(sdata->dev, &chandef, 1577 NL80211_RADAR_CAC_FINISHED, 1578 GFP_KERNEL); 1579 } 1580 mutex_unlock(&sdata->local->mtx); 1581 } 1582 1583 /* MLME */ 1584 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, 1585 struct ieee80211_sub_if_data *sdata, 1586 const u8 *wmm_param, size_t wmm_param_len) 1587 { 1588 struct ieee80211_tx_queue_params params; 1589 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1590 size_t left; 1591 int count; 1592 const u8 *pos; 1593 u8 uapsd_queues = 0; 1594 1595 if (!local->ops->conf_tx) 1596 return false; 1597 1598 if (local->hw.queues < IEEE80211_NUM_ACS) 1599 return false; 1600 1601 if (!wmm_param) 1602 return false; 1603 1604 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1605 return false; 1606 1607 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1608 uapsd_queues = ifmgd->uapsd_queues; 1609 1610 count = wmm_param[6] & 0x0f; 1611 if (count == ifmgd->wmm_last_param_set) 1612 return false; 1613 ifmgd->wmm_last_param_set = count; 1614 1615 pos = wmm_param + 8; 1616 left = wmm_param_len - 8; 1617 1618 memset(¶ms, 0, sizeof(params)); 1619 1620 sdata->wmm_acm = 0; 1621 for (; left >= 4; left -= 4, pos += 4) { 1622 int aci = (pos[0] >> 5) & 0x03; 1623 int acm = (pos[0] >> 4) & 0x01; 1624 bool uapsd = false; 1625 int queue; 1626 1627 switch (aci) { 1628 case 1: /* AC_BK */ 1629 queue = 3; 1630 if (acm) 1631 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1632 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1633 uapsd = true; 1634 break; 1635 case 2: /* AC_VI */ 1636 queue = 1; 1637 if (acm) 1638 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1639 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1640 uapsd = true; 1641 break; 1642 case 3: /* AC_VO */ 1643 queue = 0; 1644 if (acm) 1645 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1646 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1647 uapsd = true; 1648 break; 1649 case 0: /* AC_BE */ 1650 default: 1651 queue = 2; 1652 if (acm) 1653 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1654 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1655 uapsd = true; 1656 break; 1657 } 1658 1659 params.aifs = pos[0] & 0x0f; 1660 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1661 params.cw_min = ecw2cw(pos[1] & 0x0f); 1662 params.txop = get_unaligned_le16(pos + 2); 1663 params.acm = acm; 1664 params.uapsd = uapsd; 1665 1666 mlme_dbg(sdata, 1667 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n", 1668 queue, aci, acm, 1669 params.aifs, params.cw_min, params.cw_max, 1670 params.txop, params.uapsd); 1671 sdata->tx_conf[queue] = params; 1672 if (drv_conf_tx(local, sdata, queue, ¶ms)) 1673 sdata_err(sdata, 1674 "failed to set TX queue parameters for queue %d\n", 1675 queue); 1676 } 1677 1678 /* enable WMM or activate new settings */ 1679 sdata->vif.bss_conf.qos = true; 1680 return true; 1681 } 1682 1683 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1684 { 1685 lockdep_assert_held(&sdata->local->mtx); 1686 1687 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 1688 ieee80211_run_deferred_scan(sdata->local); 1689 } 1690 1691 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1692 { 1693 mutex_lock(&sdata->local->mtx); 1694 __ieee80211_stop_poll(sdata); 1695 mutex_unlock(&sdata->local->mtx); 1696 } 1697 1698 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 1699 u16 capab, bool erp_valid, u8 erp) 1700 { 1701 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1702 u32 changed = 0; 1703 bool use_protection; 1704 bool use_short_preamble; 1705 bool use_short_slot; 1706 1707 if (erp_valid) { 1708 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 1709 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 1710 } else { 1711 use_protection = false; 1712 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 1713 } 1714 1715 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 1716 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ) 1717 use_short_slot = true; 1718 1719 if (use_protection != bss_conf->use_cts_prot) { 1720 bss_conf->use_cts_prot = use_protection; 1721 changed |= BSS_CHANGED_ERP_CTS_PROT; 1722 } 1723 1724 if (use_short_preamble != bss_conf->use_short_preamble) { 1725 bss_conf->use_short_preamble = use_short_preamble; 1726 changed |= BSS_CHANGED_ERP_PREAMBLE; 1727 } 1728 1729 if (use_short_slot != bss_conf->use_short_slot) { 1730 bss_conf->use_short_slot = use_short_slot; 1731 changed |= BSS_CHANGED_ERP_SLOT; 1732 } 1733 1734 return changed; 1735 } 1736 1737 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 1738 struct cfg80211_bss *cbss, 1739 u32 bss_info_changed) 1740 { 1741 struct ieee80211_bss *bss = (void *)cbss->priv; 1742 struct ieee80211_local *local = sdata->local; 1743 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1744 1745 bss_info_changed |= BSS_CHANGED_ASSOC; 1746 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 1747 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 1748 1749 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 1750 beacon_loss_count * bss_conf->beacon_int)); 1751 1752 sdata->u.mgd.associated = cbss; 1753 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 1754 1755 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 1756 1757 if (sdata->vif.p2p) { 1758 const struct cfg80211_bss_ies *ies; 1759 1760 rcu_read_lock(); 1761 ies = rcu_dereference(cbss->ies); 1762 if (ies) { 1763 int ret; 1764 1765 ret = cfg80211_get_p2p_attr( 1766 ies->data, ies->len, 1767 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 1768 (u8 *) &bss_conf->p2p_noa_attr, 1769 sizeof(bss_conf->p2p_noa_attr)); 1770 if (ret >= 2) { 1771 sdata->u.mgd.p2p_noa_index = 1772 bss_conf->p2p_noa_attr.index; 1773 bss_info_changed |= BSS_CHANGED_P2P_PS; 1774 } 1775 } 1776 rcu_read_unlock(); 1777 } 1778 1779 /* just to be sure */ 1780 ieee80211_stop_poll(sdata); 1781 1782 ieee80211_led_assoc(local, 1); 1783 1784 if (sdata->u.mgd.have_beacon) { 1785 /* 1786 * If the AP is buggy we may get here with no DTIM period 1787 * known, so assume it's 1 which is the only safe assumption 1788 * in that case, although if the TIM IE is broken powersave 1789 * probably just won't work at all. 1790 */ 1791 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 1792 bss_conf->beacon_rate = bss->beacon_rate; 1793 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 1794 } else { 1795 bss_conf->beacon_rate = NULL; 1796 bss_conf->dtim_period = 0; 1797 } 1798 1799 bss_conf->assoc = 1; 1800 1801 /* Tell the driver to monitor connection quality (if supported) */ 1802 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 1803 bss_conf->cqm_rssi_thold) 1804 bss_info_changed |= BSS_CHANGED_CQM; 1805 1806 /* Enable ARP filtering */ 1807 if (bss_conf->arp_addr_cnt) 1808 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 1809 1810 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 1811 1812 mutex_lock(&local->iflist_mtx); 1813 ieee80211_recalc_ps(local, -1); 1814 mutex_unlock(&local->iflist_mtx); 1815 1816 ieee80211_recalc_smps(sdata); 1817 ieee80211_recalc_ps_vif(sdata); 1818 1819 netif_carrier_on(sdata->dev); 1820 } 1821 1822 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 1823 u16 stype, u16 reason, bool tx, 1824 u8 *frame_buf) 1825 { 1826 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1827 struct ieee80211_local *local = sdata->local; 1828 u32 changed = 0; 1829 1830 sdata_assert_lock(sdata); 1831 1832 if (WARN_ON_ONCE(tx && !frame_buf)) 1833 return; 1834 1835 if (WARN_ON(!ifmgd->associated)) 1836 return; 1837 1838 ieee80211_stop_poll(sdata); 1839 1840 ifmgd->associated = NULL; 1841 netif_carrier_off(sdata->dev); 1842 1843 /* 1844 * if we want to get out of ps before disassoc (why?) we have 1845 * to do it before sending disassoc, as otherwise the null-packet 1846 * won't be valid. 1847 */ 1848 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1849 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1850 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1851 } 1852 local->ps_sdata = NULL; 1853 1854 /* disable per-vif ps */ 1855 ieee80211_recalc_ps_vif(sdata); 1856 1857 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */ 1858 if (tx) 1859 ieee80211_flush_queues(local, sdata); 1860 1861 /* deauthenticate/disassociate now */ 1862 if (tx || frame_buf) 1863 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 1864 reason, tx, frame_buf); 1865 1866 /* flush out frame */ 1867 if (tx) 1868 ieee80211_flush_queues(local, sdata); 1869 1870 /* clear bssid only after building the needed mgmt frames */ 1871 memset(ifmgd->bssid, 0, ETH_ALEN); 1872 1873 /* remove AP and TDLS peers */ 1874 sta_info_flush(sdata); 1875 1876 /* finally reset all BSS / config parameters */ 1877 changed |= ieee80211_reset_erp_info(sdata); 1878 1879 ieee80211_led_assoc(local, 0); 1880 changed |= BSS_CHANGED_ASSOC; 1881 sdata->vif.bss_conf.assoc = false; 1882 1883 ifmgd->p2p_noa_index = -1; 1884 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 1885 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 1886 1887 /* on the next assoc, re-program HT/VHT parameters */ 1888 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 1889 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 1890 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 1891 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 1892 1893 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1894 1895 del_timer_sync(&local->dynamic_ps_timer); 1896 cancel_work_sync(&local->dynamic_ps_enable_work); 1897 1898 /* Disable ARP filtering */ 1899 if (sdata->vif.bss_conf.arp_addr_cnt) 1900 changed |= BSS_CHANGED_ARP_FILTER; 1901 1902 sdata->vif.bss_conf.qos = false; 1903 changed |= BSS_CHANGED_QOS; 1904 1905 /* The BSSID (not really interesting) and HT changed */ 1906 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 1907 ieee80211_bss_info_change_notify(sdata, changed); 1908 1909 /* disassociated - set to defaults now */ 1910 ieee80211_set_wmm_default(sdata, false); 1911 1912 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 1913 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 1914 del_timer_sync(&sdata->u.mgd.timer); 1915 del_timer_sync(&sdata->u.mgd.chswitch_timer); 1916 1917 sdata->vif.bss_conf.dtim_period = 0; 1918 sdata->vif.bss_conf.beacon_rate = NULL; 1919 1920 ifmgd->have_beacon = false; 1921 1922 ifmgd->flags = 0; 1923 mutex_lock(&local->mtx); 1924 ieee80211_vif_release_channel(sdata); 1925 1926 sdata->vif.csa_active = false; 1927 if (sdata->csa_block_tx) { 1928 ieee80211_wake_vif_queues(local, sdata, 1929 IEEE80211_QUEUE_STOP_REASON_CSA); 1930 sdata->csa_block_tx = false; 1931 } 1932 mutex_unlock(&local->mtx); 1933 1934 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1935 } 1936 1937 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 1938 struct ieee80211_hdr *hdr) 1939 { 1940 /* 1941 * We can postpone the mgd.timer whenever receiving unicast frames 1942 * from AP because we know that the connection is working both ways 1943 * at that time. But multicast frames (and hence also beacons) must 1944 * be ignored here, because we need to trigger the timer during 1945 * data idle periods for sending the periodic probe request to the 1946 * AP we're connected to. 1947 */ 1948 if (is_multicast_ether_addr(hdr->addr1)) 1949 return; 1950 1951 ieee80211_sta_reset_conn_monitor(sdata); 1952 } 1953 1954 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 1955 { 1956 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1957 struct ieee80211_local *local = sdata->local; 1958 1959 mutex_lock(&local->mtx); 1960 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 1961 goto out; 1962 1963 __ieee80211_stop_poll(sdata); 1964 1965 mutex_lock(&local->iflist_mtx); 1966 ieee80211_recalc_ps(local, -1); 1967 mutex_unlock(&local->iflist_mtx); 1968 1969 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 1970 goto out; 1971 1972 /* 1973 * We've received a probe response, but are not sure whether 1974 * we have or will be receiving any beacons or data, so let's 1975 * schedule the timers again, just in case. 1976 */ 1977 ieee80211_sta_reset_beacon_monitor(sdata); 1978 1979 mod_timer(&ifmgd->conn_mon_timer, 1980 round_jiffies_up(jiffies + 1981 IEEE80211_CONNECTION_IDLE_TIME)); 1982 out: 1983 mutex_unlock(&local->mtx); 1984 } 1985 1986 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 1987 struct ieee80211_hdr *hdr, bool ack) 1988 { 1989 if (!ieee80211_is_data(hdr->frame_control)) 1990 return; 1991 1992 if (ieee80211_is_nullfunc(hdr->frame_control) && 1993 sdata->u.mgd.probe_send_count > 0) { 1994 if (ack) 1995 ieee80211_sta_reset_conn_monitor(sdata); 1996 else 1997 sdata->u.mgd.nullfunc_failed = true; 1998 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 1999 return; 2000 } 2001 2002 if (ack) 2003 ieee80211_sta_reset_conn_monitor(sdata); 2004 } 2005 2006 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2007 { 2008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2009 const u8 *ssid; 2010 u8 *dst = ifmgd->associated->bssid; 2011 u8 unicast_limit = max(1, max_probe_tries - 3); 2012 2013 /* 2014 * Try sending broadcast probe requests for the last three 2015 * probe requests after the first ones failed since some 2016 * buggy APs only support broadcast probe requests. 2017 */ 2018 if (ifmgd->probe_send_count >= unicast_limit) 2019 dst = NULL; 2020 2021 /* 2022 * When the hardware reports an accurate Tx ACK status, it's 2023 * better to send a nullfunc frame instead of a probe request, 2024 * as it will kick us off the AP quickly if we aren't associated 2025 * anymore. The timeout will be reset if the frame is ACKed by 2026 * the AP. 2027 */ 2028 ifmgd->probe_send_count++; 2029 2030 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { 2031 ifmgd->nullfunc_failed = false; 2032 ieee80211_send_nullfunc(sdata->local, sdata, 0); 2033 } else { 2034 int ssid_len; 2035 2036 rcu_read_lock(); 2037 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2038 if (WARN_ON_ONCE(ssid == NULL)) 2039 ssid_len = 0; 2040 else 2041 ssid_len = ssid[1]; 2042 2043 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL, 2044 0, (u32) -1, true, 0, 2045 ifmgd->associated->channel, false); 2046 rcu_read_unlock(); 2047 } 2048 2049 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2050 run_again(sdata, ifmgd->probe_timeout); 2051 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 2052 ieee80211_flush_queues(sdata->local, sdata); 2053 } 2054 2055 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2056 bool beacon) 2057 { 2058 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2059 bool already = false; 2060 2061 if (!ieee80211_sdata_running(sdata)) 2062 return; 2063 2064 sdata_lock(sdata); 2065 2066 if (!ifmgd->associated) 2067 goto out; 2068 2069 mutex_lock(&sdata->local->mtx); 2070 2071 if (sdata->local->tmp_channel || sdata->local->scanning) { 2072 mutex_unlock(&sdata->local->mtx); 2073 goto out; 2074 } 2075 2076 if (beacon) { 2077 mlme_dbg_ratelimited(sdata, 2078 "detected beacon loss from AP (missed %d beacons) - probing\n", 2079 beacon_loss_count); 2080 2081 ieee80211_cqm_rssi_notify(&sdata->vif, 2082 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, 2083 GFP_KERNEL); 2084 } 2085 2086 /* 2087 * The driver/our work has already reported this event or the 2088 * connection monitoring has kicked in and we have already sent 2089 * a probe request. Or maybe the AP died and the driver keeps 2090 * reporting until we disassociate... 2091 * 2092 * In either case we have to ignore the current call to this 2093 * function (except for setting the correct probe reason bit) 2094 * because otherwise we would reset the timer every time and 2095 * never check whether we received a probe response! 2096 */ 2097 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2098 already = true; 2099 2100 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2101 2102 mutex_unlock(&sdata->local->mtx); 2103 2104 if (already) 2105 goto out; 2106 2107 mutex_lock(&sdata->local->iflist_mtx); 2108 ieee80211_recalc_ps(sdata->local, -1); 2109 mutex_unlock(&sdata->local->iflist_mtx); 2110 2111 ifmgd->probe_send_count = 0; 2112 ieee80211_mgd_probe_ap_send(sdata); 2113 out: 2114 sdata_unlock(sdata); 2115 } 2116 2117 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2118 struct ieee80211_vif *vif) 2119 { 2120 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2121 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2122 struct cfg80211_bss *cbss; 2123 struct sk_buff *skb; 2124 const u8 *ssid; 2125 int ssid_len; 2126 2127 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2128 return NULL; 2129 2130 sdata_assert_lock(sdata); 2131 2132 if (ifmgd->associated) 2133 cbss = ifmgd->associated; 2134 else if (ifmgd->auth_data) 2135 cbss = ifmgd->auth_data->bss; 2136 else if (ifmgd->assoc_data) 2137 cbss = ifmgd->assoc_data->bss; 2138 else 2139 return NULL; 2140 2141 rcu_read_lock(); 2142 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2143 if (WARN_ON_ONCE(ssid == NULL)) 2144 ssid_len = 0; 2145 else 2146 ssid_len = ssid[1]; 2147 2148 skb = ieee80211_build_probe_req(sdata, cbss->bssid, 2149 (u32) -1, cbss->channel, 2150 ssid + 2, ssid_len, 2151 NULL, 0, true); 2152 rcu_read_unlock(); 2153 2154 return skb; 2155 } 2156 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2157 2158 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2159 { 2160 struct ieee80211_local *local = sdata->local; 2161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2162 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2163 2164 sdata_lock(sdata); 2165 if (!ifmgd->associated) { 2166 sdata_unlock(sdata); 2167 return; 2168 } 2169 2170 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2171 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2172 true, frame_buf); 2173 mutex_lock(&local->mtx); 2174 sdata->vif.csa_active = false; 2175 if (sdata->csa_block_tx) { 2176 ieee80211_wake_vif_queues(local, sdata, 2177 IEEE80211_QUEUE_STOP_REASON_CSA); 2178 sdata->csa_block_tx = false; 2179 } 2180 mutex_unlock(&local->mtx); 2181 2182 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 2183 IEEE80211_DEAUTH_FRAME_LEN); 2184 sdata_unlock(sdata); 2185 } 2186 2187 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2188 { 2189 struct ieee80211_sub_if_data *sdata = 2190 container_of(work, struct ieee80211_sub_if_data, 2191 u.mgd.beacon_connection_loss_work); 2192 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2193 struct sta_info *sta; 2194 2195 if (ifmgd->associated) { 2196 rcu_read_lock(); 2197 sta = sta_info_get(sdata, ifmgd->bssid); 2198 if (sta) 2199 sta->beacon_loss_count++; 2200 rcu_read_unlock(); 2201 } 2202 2203 if (ifmgd->connection_loss) { 2204 sdata_info(sdata, "Connection to AP %pM lost\n", 2205 ifmgd->bssid); 2206 __ieee80211_disconnect(sdata); 2207 } else { 2208 ieee80211_mgd_probe_ap(sdata, true); 2209 } 2210 } 2211 2212 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2213 { 2214 struct ieee80211_sub_if_data *sdata = 2215 container_of(work, struct ieee80211_sub_if_data, 2216 u.mgd.csa_connection_drop_work); 2217 2218 __ieee80211_disconnect(sdata); 2219 } 2220 2221 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2222 { 2223 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2224 struct ieee80211_hw *hw = &sdata->local->hw; 2225 2226 trace_api_beacon_loss(sdata); 2227 2228 sdata->u.mgd.connection_loss = false; 2229 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2230 } 2231 EXPORT_SYMBOL(ieee80211_beacon_loss); 2232 2233 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2234 { 2235 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2236 struct ieee80211_hw *hw = &sdata->local->hw; 2237 2238 trace_api_connection_loss(sdata); 2239 2240 sdata->u.mgd.connection_loss = true; 2241 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2242 } 2243 EXPORT_SYMBOL(ieee80211_connection_loss); 2244 2245 2246 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2247 bool assoc) 2248 { 2249 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2250 2251 sdata_assert_lock(sdata); 2252 2253 if (!assoc) { 2254 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2255 2256 memset(sdata->u.mgd.bssid, 0, ETH_ALEN); 2257 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2258 sdata->u.mgd.flags = 0; 2259 mutex_lock(&sdata->local->mtx); 2260 ieee80211_vif_release_channel(sdata); 2261 mutex_unlock(&sdata->local->mtx); 2262 } 2263 2264 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2265 kfree(auth_data); 2266 sdata->u.mgd.auth_data = NULL; 2267 } 2268 2269 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2270 struct ieee80211_mgmt *mgmt, size_t len) 2271 { 2272 struct ieee80211_local *local = sdata->local; 2273 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2274 u8 *pos; 2275 struct ieee802_11_elems elems; 2276 u32 tx_flags = 0; 2277 2278 pos = mgmt->u.auth.variable; 2279 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2280 if (!elems.challenge) 2281 return; 2282 auth_data->expected_transaction = 4; 2283 drv_mgd_prepare_tx(sdata->local, sdata); 2284 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 2285 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2286 IEEE80211_TX_INTFL_MLME_CONN_TX; 2287 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2288 elems.challenge - 2, elems.challenge_len + 2, 2289 auth_data->bss->bssid, auth_data->bss->bssid, 2290 auth_data->key, auth_data->key_len, 2291 auth_data->key_idx, tx_flags); 2292 } 2293 2294 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2295 struct ieee80211_mgmt *mgmt, size_t len) 2296 { 2297 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2298 u8 bssid[ETH_ALEN]; 2299 u16 auth_alg, auth_transaction, status_code; 2300 struct sta_info *sta; 2301 2302 sdata_assert_lock(sdata); 2303 2304 if (len < 24 + 6) 2305 return; 2306 2307 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2308 return; 2309 2310 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2311 2312 if (!ether_addr_equal(bssid, mgmt->bssid)) 2313 return; 2314 2315 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2316 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2317 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2318 2319 if (auth_alg != ifmgd->auth_data->algorithm || 2320 auth_transaction != ifmgd->auth_data->expected_transaction) { 2321 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2322 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2323 auth_transaction, 2324 ifmgd->auth_data->expected_transaction); 2325 return; 2326 } 2327 2328 if (status_code != WLAN_STATUS_SUCCESS) { 2329 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2330 mgmt->sa, status_code); 2331 ieee80211_destroy_auth_data(sdata, false); 2332 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2333 return; 2334 } 2335 2336 switch (ifmgd->auth_data->algorithm) { 2337 case WLAN_AUTH_OPEN: 2338 case WLAN_AUTH_LEAP: 2339 case WLAN_AUTH_FT: 2340 case WLAN_AUTH_SAE: 2341 break; 2342 case WLAN_AUTH_SHARED_KEY: 2343 if (ifmgd->auth_data->expected_transaction != 4) { 2344 ieee80211_auth_challenge(sdata, mgmt, len); 2345 /* need another frame */ 2346 return; 2347 } 2348 break; 2349 default: 2350 WARN_ONCE(1, "invalid auth alg %d", 2351 ifmgd->auth_data->algorithm); 2352 return; 2353 } 2354 2355 sdata_info(sdata, "authenticated\n"); 2356 ifmgd->auth_data->done = true; 2357 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2358 ifmgd->auth_data->timeout_started = true; 2359 run_again(sdata, ifmgd->auth_data->timeout); 2360 2361 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2362 ifmgd->auth_data->expected_transaction != 2) { 2363 /* 2364 * Report auth frame to user space for processing since another 2365 * round of Authentication frames is still needed. 2366 */ 2367 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2368 return; 2369 } 2370 2371 /* move station state to auth */ 2372 mutex_lock(&sdata->local->sta_mtx); 2373 sta = sta_info_get(sdata, bssid); 2374 if (!sta) { 2375 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2376 goto out_err; 2377 } 2378 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2379 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2380 goto out_err; 2381 } 2382 mutex_unlock(&sdata->local->sta_mtx); 2383 2384 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2385 return; 2386 out_err: 2387 mutex_unlock(&sdata->local->sta_mtx); 2388 /* ignore frame -- wait for timeout */ 2389 } 2390 2391 #define case_WLAN(type) \ 2392 case WLAN_REASON_##type: return #type 2393 2394 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2395 { 2396 switch (reason_code) { 2397 case_WLAN(UNSPECIFIED); 2398 case_WLAN(PREV_AUTH_NOT_VALID); 2399 case_WLAN(DEAUTH_LEAVING); 2400 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2401 case_WLAN(DISASSOC_AP_BUSY); 2402 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2403 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2404 case_WLAN(DISASSOC_STA_HAS_LEFT); 2405 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2406 case_WLAN(DISASSOC_BAD_POWER); 2407 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2408 case_WLAN(INVALID_IE); 2409 case_WLAN(MIC_FAILURE); 2410 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2411 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2412 case_WLAN(IE_DIFFERENT); 2413 case_WLAN(INVALID_GROUP_CIPHER); 2414 case_WLAN(INVALID_PAIRWISE_CIPHER); 2415 case_WLAN(INVALID_AKMP); 2416 case_WLAN(UNSUPP_RSN_VERSION); 2417 case_WLAN(INVALID_RSN_IE_CAP); 2418 case_WLAN(IEEE8021X_FAILED); 2419 case_WLAN(CIPHER_SUITE_REJECTED); 2420 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2421 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2422 case_WLAN(DISASSOC_LOW_ACK); 2423 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2424 case_WLAN(QSTA_LEAVE_QBSS); 2425 case_WLAN(QSTA_NOT_USE); 2426 case_WLAN(QSTA_REQUIRE_SETUP); 2427 case_WLAN(QSTA_TIMEOUT); 2428 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2429 case_WLAN(MESH_PEER_CANCELED); 2430 case_WLAN(MESH_MAX_PEERS); 2431 case_WLAN(MESH_CONFIG); 2432 case_WLAN(MESH_CLOSE); 2433 case_WLAN(MESH_MAX_RETRIES); 2434 case_WLAN(MESH_CONFIRM_TIMEOUT); 2435 case_WLAN(MESH_INVALID_GTK); 2436 case_WLAN(MESH_INCONSISTENT_PARAM); 2437 case_WLAN(MESH_INVALID_SECURITY); 2438 case_WLAN(MESH_PATH_ERROR); 2439 case_WLAN(MESH_PATH_NOFORWARD); 2440 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2441 case_WLAN(MAC_EXISTS_IN_MBSS); 2442 case_WLAN(MESH_CHAN_REGULATORY); 2443 case_WLAN(MESH_CHAN); 2444 default: return "<unknown>"; 2445 } 2446 } 2447 2448 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2449 struct ieee80211_mgmt *mgmt, size_t len) 2450 { 2451 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2452 const u8 *bssid = NULL; 2453 u16 reason_code; 2454 2455 sdata_assert_lock(sdata); 2456 2457 if (len < 24 + 2) 2458 return; 2459 2460 if (!ifmgd->associated || 2461 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2462 return; 2463 2464 bssid = ifmgd->associated->bssid; 2465 2466 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2467 2468 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2469 bssid, reason_code, ieee80211_get_reason_code_string(reason_code)); 2470 2471 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2472 2473 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2474 } 2475 2476 2477 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2478 struct ieee80211_mgmt *mgmt, size_t len) 2479 { 2480 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2481 u16 reason_code; 2482 2483 sdata_assert_lock(sdata); 2484 2485 if (len < 24 + 2) 2486 return; 2487 2488 if (!ifmgd->associated || 2489 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2490 return; 2491 2492 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2493 2494 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n", 2495 mgmt->sa, reason_code); 2496 2497 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2498 2499 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2500 } 2501 2502 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 2503 u8 *supp_rates, unsigned int supp_rates_len, 2504 u32 *rates, u32 *basic_rates, 2505 bool *have_higher_than_11mbit, 2506 int *min_rate, int *min_rate_index, 2507 int shift, u32 rate_flags) 2508 { 2509 int i, j; 2510 2511 for (i = 0; i < supp_rates_len; i++) { 2512 int rate = supp_rates[i] & 0x7f; 2513 bool is_basic = !!(supp_rates[i] & 0x80); 2514 2515 if ((rate * 5 * (1 << shift)) > 110) 2516 *have_higher_than_11mbit = true; 2517 2518 /* 2519 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009 2520 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it. 2521 * 2522 * Note: Even through the membership selector and the basic 2523 * rate flag share the same bit, they are not exactly 2524 * the same. 2525 */ 2526 if (!!(supp_rates[i] & 0x80) && 2527 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 2528 continue; 2529 2530 for (j = 0; j < sband->n_bitrates; j++) { 2531 struct ieee80211_rate *br; 2532 int brate; 2533 2534 br = &sband->bitrates[j]; 2535 if ((rate_flags & br->flags) != rate_flags) 2536 continue; 2537 2538 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2539 if (brate == rate) { 2540 *rates |= BIT(j); 2541 if (is_basic) 2542 *basic_rates |= BIT(j); 2543 if ((rate * 5) < *min_rate) { 2544 *min_rate = rate * 5; 2545 *min_rate_index = j; 2546 } 2547 break; 2548 } 2549 } 2550 } 2551 } 2552 2553 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2554 bool assoc) 2555 { 2556 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2557 2558 sdata_assert_lock(sdata); 2559 2560 if (!assoc) { 2561 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2562 2563 memset(sdata->u.mgd.bssid, 0, ETH_ALEN); 2564 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2565 sdata->u.mgd.flags = 0; 2566 mutex_lock(&sdata->local->mtx); 2567 ieee80211_vif_release_channel(sdata); 2568 mutex_unlock(&sdata->local->mtx); 2569 } 2570 2571 kfree(assoc_data); 2572 sdata->u.mgd.assoc_data = NULL; 2573 } 2574 2575 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 2576 struct cfg80211_bss *cbss, 2577 struct ieee80211_mgmt *mgmt, size_t len) 2578 { 2579 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2580 struct ieee80211_local *local = sdata->local; 2581 struct ieee80211_supported_band *sband; 2582 struct sta_info *sta; 2583 u8 *pos; 2584 u16 capab_info, aid; 2585 struct ieee802_11_elems elems; 2586 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2587 const struct cfg80211_bss_ies *bss_ies = NULL; 2588 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2589 u32 changed = 0; 2590 int err; 2591 bool ret; 2592 2593 /* AssocResp and ReassocResp have identical structure */ 2594 2595 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2596 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2597 2598 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) 2599 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", 2600 aid); 2601 aid &= ~(BIT(15) | BIT(14)); 2602 2603 ifmgd->broken_ap = false; 2604 2605 if (aid == 0 || aid > IEEE80211_MAX_AID) { 2606 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 2607 aid); 2608 aid = 0; 2609 ifmgd->broken_ap = true; 2610 } 2611 2612 pos = mgmt->u.assoc_resp.variable; 2613 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2614 2615 if (!elems.supp_rates) { 2616 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 2617 return false; 2618 } 2619 2620 ifmgd->aid = aid; 2621 2622 /* 2623 * Some APs are erroneously not including some information in their 2624 * (re)association response frames. Try to recover by using the data 2625 * from the beacon or probe response. This seems to afflict mobile 2626 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 2627 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 2628 */ 2629 if ((assoc_data->wmm && !elems.wmm_param) || 2630 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2631 (!elems.ht_cap_elem || !elems.ht_operation)) || 2632 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2633 (!elems.vht_cap_elem || !elems.vht_operation))) { 2634 const struct cfg80211_bss_ies *ies; 2635 struct ieee802_11_elems bss_elems; 2636 2637 rcu_read_lock(); 2638 ies = rcu_dereference(cbss->ies); 2639 if (ies) 2640 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 2641 GFP_ATOMIC); 2642 rcu_read_unlock(); 2643 if (!bss_ies) 2644 return false; 2645 2646 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 2647 false, &bss_elems); 2648 if (assoc_data->wmm && 2649 !elems.wmm_param && bss_elems.wmm_param) { 2650 elems.wmm_param = bss_elems.wmm_param; 2651 sdata_info(sdata, 2652 "AP bug: WMM param missing from AssocResp\n"); 2653 } 2654 2655 /* 2656 * Also check if we requested HT/VHT, otherwise the AP doesn't 2657 * have to include the IEs in the (re)association response. 2658 */ 2659 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 2660 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2661 elems.ht_cap_elem = bss_elems.ht_cap_elem; 2662 sdata_info(sdata, 2663 "AP bug: HT capability missing from AssocResp\n"); 2664 } 2665 if (!elems.ht_operation && bss_elems.ht_operation && 2666 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2667 elems.ht_operation = bss_elems.ht_operation; 2668 sdata_info(sdata, 2669 "AP bug: HT operation missing from AssocResp\n"); 2670 } 2671 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 2672 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2673 elems.vht_cap_elem = bss_elems.vht_cap_elem; 2674 sdata_info(sdata, 2675 "AP bug: VHT capa missing from AssocResp\n"); 2676 } 2677 if (!elems.vht_operation && bss_elems.vht_operation && 2678 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2679 elems.vht_operation = bss_elems.vht_operation; 2680 sdata_info(sdata, 2681 "AP bug: VHT operation missing from AssocResp\n"); 2682 } 2683 } 2684 2685 /* 2686 * We previously checked these in the beacon/probe response, so 2687 * they should be present here. This is just a safety net. 2688 */ 2689 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2690 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 2691 sdata_info(sdata, 2692 "HT AP is missing WMM params or HT capability/operation\n"); 2693 ret = false; 2694 goto out; 2695 } 2696 2697 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2698 (!elems.vht_cap_elem || !elems.vht_operation)) { 2699 sdata_info(sdata, 2700 "VHT AP is missing VHT capability/operation\n"); 2701 ret = false; 2702 goto out; 2703 } 2704 2705 mutex_lock(&sdata->local->sta_mtx); 2706 /* 2707 * station info was already allocated and inserted before 2708 * the association and should be available to us 2709 */ 2710 sta = sta_info_get(sdata, cbss->bssid); 2711 if (WARN_ON(!sta)) { 2712 mutex_unlock(&sdata->local->sta_mtx); 2713 ret = false; 2714 goto out; 2715 } 2716 2717 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; 2718 2719 /* Set up internal HT/VHT capabilities */ 2720 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 2721 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 2722 elems.ht_cap_elem, sta); 2723 2724 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 2725 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 2726 elems.vht_cap_elem, sta); 2727 2728 /* 2729 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 2730 * in their association response, so ignore that data for our own 2731 * configuration. If it changed since the last beacon, we'll get the 2732 * next beacon and update then. 2733 */ 2734 2735 /* 2736 * If an operating mode notification IE is present, override the 2737 * NSS calculation (that would be done in rate_control_rate_init()) 2738 * and use the # of streams from that element. 2739 */ 2740 if (elems.opmode_notif && 2741 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 2742 u8 nss; 2743 2744 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 2745 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 2746 nss += 1; 2747 sta->sta.rx_nss = nss; 2748 } 2749 2750 rate_control_rate_init(sta); 2751 2752 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) 2753 set_sta_flag(sta, WLAN_STA_MFP); 2754 2755 sta->sta.wme = elems.wmm_param; 2756 2757 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 2758 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 2759 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 2760 if (err) { 2761 sdata_info(sdata, 2762 "failed to move station %pM to desired state\n", 2763 sta->sta.addr); 2764 WARN_ON(__sta_info_destroy(sta)); 2765 mutex_unlock(&sdata->local->sta_mtx); 2766 ret = false; 2767 goto out; 2768 } 2769 2770 mutex_unlock(&sdata->local->sta_mtx); 2771 2772 /* 2773 * Always handle WMM once after association regardless 2774 * of the first value the AP uses. Setting -1 here has 2775 * that effect because the AP values is an unsigned 2776 * 4-bit value. 2777 */ 2778 ifmgd->wmm_last_param_set = -1; 2779 2780 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param) 2781 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 2782 elems.wmm_param_len); 2783 else 2784 ieee80211_set_wmm_default(sdata, false); 2785 changed |= BSS_CHANGED_QOS; 2786 2787 /* set AID and assoc capability, 2788 * ieee80211_set_associated() will tell the driver */ 2789 bss_conf->aid = aid; 2790 bss_conf->assoc_capability = capab_info; 2791 ieee80211_set_associated(sdata, cbss, changed); 2792 2793 /* 2794 * If we're using 4-addr mode, let the AP know that we're 2795 * doing so, so that it can create the STA VLAN on its side 2796 */ 2797 if (ifmgd->use_4addr) 2798 ieee80211_send_4addr_nullfunc(local, sdata); 2799 2800 /* 2801 * Start timer to probe the connection to the AP now. 2802 * Also start the timer that will detect beacon loss. 2803 */ 2804 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 2805 ieee80211_sta_reset_beacon_monitor(sdata); 2806 2807 ret = true; 2808 out: 2809 kfree(bss_ies); 2810 return ret; 2811 } 2812 2813 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 2814 struct ieee80211_mgmt *mgmt, 2815 size_t len) 2816 { 2817 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2818 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2819 u16 capab_info, status_code, aid; 2820 struct ieee802_11_elems elems; 2821 int ac, uapsd_queues = -1; 2822 u8 *pos; 2823 bool reassoc; 2824 struct cfg80211_bss *bss; 2825 2826 sdata_assert_lock(sdata); 2827 2828 if (!assoc_data) 2829 return; 2830 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 2831 return; 2832 2833 /* 2834 * AssocResp and ReassocResp have identical structure, so process both 2835 * of them in this function. 2836 */ 2837 2838 if (len < 24 + 6) 2839 return; 2840 2841 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); 2842 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2843 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 2844 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2845 2846 sdata_info(sdata, 2847 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 2848 reassoc ? "Rea" : "A", mgmt->sa, 2849 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 2850 2851 pos = mgmt->u.assoc_resp.variable; 2852 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2853 2854 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 2855 elems.timeout_int && 2856 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 2857 u32 tu, ms; 2858 tu = le32_to_cpu(elems.timeout_int->value); 2859 ms = tu * 1024 / 1000; 2860 sdata_info(sdata, 2861 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 2862 mgmt->sa, tu, ms); 2863 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 2864 assoc_data->timeout_started = true; 2865 if (ms > IEEE80211_ASSOC_TIMEOUT) 2866 run_again(sdata, assoc_data->timeout); 2867 return; 2868 } 2869 2870 bss = assoc_data->bss; 2871 2872 if (status_code != WLAN_STATUS_SUCCESS) { 2873 sdata_info(sdata, "%pM denied association (code=%d)\n", 2874 mgmt->sa, status_code); 2875 ieee80211_destroy_assoc_data(sdata, false); 2876 } else { 2877 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 2878 /* oops -- internal error -- send timeout for now */ 2879 ieee80211_destroy_assoc_data(sdata, false); 2880 cfg80211_assoc_timeout(sdata->dev, bss); 2881 return; 2882 } 2883 sdata_info(sdata, "associated\n"); 2884 2885 /* 2886 * destroy assoc_data afterwards, as otherwise an idle 2887 * recalc after assoc_data is NULL but before associated 2888 * is set can cause the interface to go idle 2889 */ 2890 ieee80211_destroy_assoc_data(sdata, true); 2891 2892 /* get uapsd queues configuration */ 2893 uapsd_queues = 0; 2894 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2895 if (sdata->tx_conf[ac].uapsd) 2896 uapsd_queues |= BIT(ac); 2897 } 2898 2899 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 2900 } 2901 2902 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 2903 struct ieee80211_mgmt *mgmt, size_t len, 2904 struct ieee80211_rx_status *rx_status, 2905 struct ieee802_11_elems *elems) 2906 { 2907 struct ieee80211_local *local = sdata->local; 2908 struct ieee80211_bss *bss; 2909 struct ieee80211_channel *channel; 2910 2911 sdata_assert_lock(sdata); 2912 2913 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 2914 if (!channel) 2915 return; 2916 2917 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 2918 channel); 2919 if (bss) { 2920 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 2921 ieee80211_rx_bss_put(local, bss); 2922 } 2923 } 2924 2925 2926 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 2927 struct sk_buff *skb) 2928 { 2929 struct ieee80211_mgmt *mgmt = (void *)skb->data; 2930 struct ieee80211_if_managed *ifmgd; 2931 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 2932 size_t baselen, len = skb->len; 2933 struct ieee802_11_elems elems; 2934 2935 ifmgd = &sdata->u.mgd; 2936 2937 sdata_assert_lock(sdata); 2938 2939 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 2940 return; /* ignore ProbeResp to foreign address */ 2941 2942 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 2943 if (baselen > len) 2944 return; 2945 2946 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 2947 false, &elems); 2948 2949 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 2950 2951 if (ifmgd->associated && 2952 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2953 ieee80211_reset_ap_probe(sdata); 2954 2955 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies && 2956 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) { 2957 /* got probe response, continue with auth */ 2958 sdata_info(sdata, "direct probe responded\n"); 2959 ifmgd->auth_data->tries = 0; 2960 ifmgd->auth_data->timeout = jiffies; 2961 ifmgd->auth_data->timeout_started = true; 2962 run_again(sdata, ifmgd->auth_data->timeout); 2963 } 2964 } 2965 2966 /* 2967 * This is the canonical list of information elements we care about, 2968 * the filter code also gives us all changes to the Microsoft OUI 2969 * (00:50:F2) vendor IE which is used for WMM which we need to track, 2970 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 2971 * changes to requested client power. 2972 * 2973 * We implement beacon filtering in software since that means we can 2974 * avoid processing the frame here and in cfg80211, and userspace 2975 * will not be able to tell whether the hardware supports it or not. 2976 * 2977 * XXX: This list needs to be dynamic -- userspace needs to be able to 2978 * add items it requires. It also needs to be able to tell us to 2979 * look out for other vendor IEs. 2980 */ 2981 static const u64 care_about_ies = 2982 (1ULL << WLAN_EID_COUNTRY) | 2983 (1ULL << WLAN_EID_ERP_INFO) | 2984 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 2985 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 2986 (1ULL << WLAN_EID_HT_CAPABILITY) | 2987 (1ULL << WLAN_EID_HT_OPERATION); 2988 2989 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 2990 struct ieee80211_mgmt *mgmt, size_t len, 2991 struct ieee80211_rx_status *rx_status) 2992 { 2993 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2994 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2995 size_t baselen; 2996 struct ieee802_11_elems elems; 2997 struct ieee80211_local *local = sdata->local; 2998 struct ieee80211_chanctx_conf *chanctx_conf; 2999 struct ieee80211_channel *chan; 3000 struct sta_info *sta; 3001 u32 changed = 0; 3002 bool erp_valid; 3003 u8 erp_value = 0; 3004 u32 ncrc; 3005 u8 *bssid; 3006 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3007 3008 sdata_assert_lock(sdata); 3009 3010 /* Process beacon from the current BSS */ 3011 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3012 if (baselen > len) 3013 return; 3014 3015 rcu_read_lock(); 3016 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3017 if (!chanctx_conf) { 3018 rcu_read_unlock(); 3019 return; 3020 } 3021 3022 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3023 rcu_read_unlock(); 3024 return; 3025 } 3026 chan = chanctx_conf->def.chan; 3027 rcu_read_unlock(); 3028 3029 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3030 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3031 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3032 len - baselen, false, &elems); 3033 3034 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3035 if (elems.tim && !elems.parse_error) { 3036 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3037 ifmgd->dtim_period = tim_ie->dtim_period; 3038 } 3039 ifmgd->have_beacon = true; 3040 ifmgd->assoc_data->need_beacon = false; 3041 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { 3042 sdata->vif.bss_conf.sync_tsf = 3043 le64_to_cpu(mgmt->u.beacon.timestamp); 3044 sdata->vif.bss_conf.sync_device_ts = 3045 rx_status->device_timestamp; 3046 if (elems.tim) 3047 sdata->vif.bss_conf.sync_dtim_count = 3048 elems.tim->dtim_count; 3049 else 3050 sdata->vif.bss_conf.sync_dtim_count = 0; 3051 } 3052 /* continue assoc process */ 3053 ifmgd->assoc_data->timeout = jiffies; 3054 ifmgd->assoc_data->timeout_started = true; 3055 run_again(sdata, ifmgd->assoc_data->timeout); 3056 return; 3057 } 3058 3059 if (!ifmgd->associated || 3060 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3061 return; 3062 bssid = ifmgd->associated->bssid; 3063 3064 /* Track average RSSI from the Beacon frames of the current AP */ 3065 ifmgd->last_beacon_signal = rx_status->signal; 3066 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3067 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3068 ifmgd->ave_beacon_signal = rx_status->signal * 16; 3069 ifmgd->last_cqm_event_signal = 0; 3070 ifmgd->count_beacon_signal = 1; 3071 ifmgd->last_ave_beacon_signal = 0; 3072 } else { 3073 ifmgd->ave_beacon_signal = 3074 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 + 3075 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) * 3076 ifmgd->ave_beacon_signal) / 16; 3077 ifmgd->count_beacon_signal++; 3078 } 3079 3080 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3081 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3082 int sig = ifmgd->ave_beacon_signal; 3083 int last_sig = ifmgd->last_ave_beacon_signal; 3084 3085 /* 3086 * if signal crosses either of the boundaries, invoke callback 3087 * with appropriate parameters 3088 */ 3089 if (sig > ifmgd->rssi_max_thold && 3090 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3091 ifmgd->last_ave_beacon_signal = sig; 3092 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH); 3093 } else if (sig < ifmgd->rssi_min_thold && 3094 (last_sig >= ifmgd->rssi_max_thold || 3095 last_sig == 0)) { 3096 ifmgd->last_ave_beacon_signal = sig; 3097 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW); 3098 } 3099 } 3100 3101 if (bss_conf->cqm_rssi_thold && 3102 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3103 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3104 int sig = ifmgd->ave_beacon_signal / 16; 3105 int last_event = ifmgd->last_cqm_event_signal; 3106 int thold = bss_conf->cqm_rssi_thold; 3107 int hyst = bss_conf->cqm_rssi_hyst; 3108 if (sig < thold && 3109 (last_event == 0 || sig < last_event - hyst)) { 3110 ifmgd->last_cqm_event_signal = sig; 3111 ieee80211_cqm_rssi_notify( 3112 &sdata->vif, 3113 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3114 GFP_KERNEL); 3115 } else if (sig > thold && 3116 (last_event == 0 || sig > last_event + hyst)) { 3117 ifmgd->last_cqm_event_signal = sig; 3118 ieee80211_cqm_rssi_notify( 3119 &sdata->vif, 3120 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3121 GFP_KERNEL); 3122 } 3123 } 3124 3125 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3126 mlme_dbg_ratelimited(sdata, 3127 "cancelling AP probe due to a received beacon\n"); 3128 ieee80211_reset_ap_probe(sdata); 3129 } 3130 3131 /* 3132 * Push the beacon loss detection into the future since 3133 * we are processing a beacon from the AP just now. 3134 */ 3135 ieee80211_sta_reset_beacon_monitor(sdata); 3136 3137 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3138 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3139 len - baselen, false, &elems, 3140 care_about_ies, ncrc); 3141 3142 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { 3143 bool directed_tim = ieee80211_check_tim(elems.tim, 3144 elems.tim_len, 3145 ifmgd->aid); 3146 if (directed_tim) { 3147 if (local->hw.conf.dynamic_ps_timeout > 0) { 3148 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3149 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3150 ieee80211_hw_config(local, 3151 IEEE80211_CONF_CHANGE_PS); 3152 } 3153 ieee80211_send_nullfunc(local, sdata, 0); 3154 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3155 local->pspolling = true; 3156 3157 /* 3158 * Here is assumed that the driver will be 3159 * able to send ps-poll frame and receive a 3160 * response even though power save mode is 3161 * enabled, but some drivers might require 3162 * to disable power save here. This needs 3163 * to be investigated. 3164 */ 3165 ieee80211_send_pspoll(local, sdata); 3166 } 3167 } 3168 } 3169 3170 if (sdata->vif.p2p) { 3171 struct ieee80211_p2p_noa_attr noa = {}; 3172 int ret; 3173 3174 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3175 len - baselen, 3176 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3177 (u8 *) &noa, sizeof(noa)); 3178 if (ret >= 2) { 3179 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3180 /* valid noa_attr and index changed */ 3181 sdata->u.mgd.p2p_noa_index = noa.index; 3182 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3183 changed |= BSS_CHANGED_P2P_PS; 3184 /* 3185 * make sure we update all information, the CRC 3186 * mechanism doesn't look at P2P attributes. 3187 */ 3188 ifmgd->beacon_crc_valid = false; 3189 } 3190 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3191 /* noa_attr not found and we had valid noa_attr before */ 3192 sdata->u.mgd.p2p_noa_index = -1; 3193 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3194 changed |= BSS_CHANGED_P2P_PS; 3195 ifmgd->beacon_crc_valid = false; 3196 } 3197 } 3198 3199 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3200 return; 3201 ifmgd->beacon_crc = ncrc; 3202 ifmgd->beacon_crc_valid = true; 3203 3204 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3205 3206 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3207 &elems, true); 3208 3209 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3210 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3211 elems.wmm_param_len)) 3212 changed |= BSS_CHANGED_QOS; 3213 3214 /* 3215 * If we haven't had a beacon before, tell the driver about the 3216 * DTIM period (and beacon timing if desired) now. 3217 */ 3218 if (!ifmgd->have_beacon) { 3219 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3220 if (elems.tim) 3221 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3222 else 3223 bss_conf->dtim_period = 1; 3224 3225 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { 3226 sdata->vif.bss_conf.sync_tsf = 3227 le64_to_cpu(mgmt->u.beacon.timestamp); 3228 sdata->vif.bss_conf.sync_device_ts = 3229 rx_status->device_timestamp; 3230 if (elems.tim) 3231 sdata->vif.bss_conf.sync_dtim_count = 3232 elems.tim->dtim_count; 3233 else 3234 sdata->vif.bss_conf.sync_dtim_count = 0; 3235 } 3236 3237 changed |= BSS_CHANGED_BEACON_INFO; 3238 ifmgd->have_beacon = true; 3239 3240 mutex_lock(&local->iflist_mtx); 3241 ieee80211_recalc_ps(local, -1); 3242 mutex_unlock(&local->iflist_mtx); 3243 3244 ieee80211_recalc_ps_vif(sdata); 3245 } 3246 3247 if (elems.erp_info) { 3248 erp_valid = true; 3249 erp_value = elems.erp_info[0]; 3250 } else { 3251 erp_valid = false; 3252 } 3253 changed |= ieee80211_handle_bss_capability(sdata, 3254 le16_to_cpu(mgmt->u.beacon.capab_info), 3255 erp_valid, erp_value); 3256 3257 mutex_lock(&local->sta_mtx); 3258 sta = sta_info_get(sdata, bssid); 3259 3260 if (ieee80211_config_bw(sdata, sta, 3261 elems.ht_cap_elem, elems.ht_operation, 3262 elems.vht_operation, bssid, &changed)) { 3263 mutex_unlock(&local->sta_mtx); 3264 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3265 WLAN_REASON_DEAUTH_LEAVING, 3266 true, deauth_buf); 3267 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf, 3268 sizeof(deauth_buf)); 3269 return; 3270 } 3271 3272 if (sta && elems.opmode_notif) 3273 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3274 rx_status->band, true); 3275 mutex_unlock(&local->sta_mtx); 3276 3277 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3278 elems.country_elem, 3279 elems.country_elem_len, 3280 elems.pwr_constr_elem, 3281 elems.cisco_dtpc_elem); 3282 3283 ieee80211_bss_info_change_notify(sdata, changed); 3284 } 3285 3286 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3287 struct sk_buff *skb) 3288 { 3289 struct ieee80211_rx_status *rx_status; 3290 struct ieee80211_mgmt *mgmt; 3291 u16 fc; 3292 struct ieee802_11_elems elems; 3293 int ies_len; 3294 3295 rx_status = (struct ieee80211_rx_status *) skb->cb; 3296 mgmt = (struct ieee80211_mgmt *) skb->data; 3297 fc = le16_to_cpu(mgmt->frame_control); 3298 3299 sdata_lock(sdata); 3300 3301 switch (fc & IEEE80211_FCTL_STYPE) { 3302 case IEEE80211_STYPE_BEACON: 3303 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3304 break; 3305 case IEEE80211_STYPE_PROBE_RESP: 3306 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3307 break; 3308 case IEEE80211_STYPE_AUTH: 3309 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3310 break; 3311 case IEEE80211_STYPE_DEAUTH: 3312 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3313 break; 3314 case IEEE80211_STYPE_DISASSOC: 3315 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3316 break; 3317 case IEEE80211_STYPE_ASSOC_RESP: 3318 case IEEE80211_STYPE_REASSOC_RESP: 3319 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3320 break; 3321 case IEEE80211_STYPE_ACTION: 3322 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3323 ies_len = skb->len - 3324 offsetof(struct ieee80211_mgmt, 3325 u.action.u.chan_switch.variable); 3326 3327 if (ies_len < 0) 3328 break; 3329 3330 ieee802_11_parse_elems( 3331 mgmt->u.action.u.chan_switch.variable, 3332 ies_len, true, &elems); 3333 3334 if (elems.parse_error) 3335 break; 3336 3337 ieee80211_sta_process_chanswitch(sdata, 3338 rx_status->mactime, 3339 &elems, false); 3340 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3341 ies_len = skb->len - 3342 offsetof(struct ieee80211_mgmt, 3343 u.action.u.ext_chan_switch.variable); 3344 3345 if (ies_len < 0) 3346 break; 3347 3348 ieee802_11_parse_elems( 3349 mgmt->u.action.u.ext_chan_switch.variable, 3350 ies_len, true, &elems); 3351 3352 if (elems.parse_error) 3353 break; 3354 3355 /* for the handling code pretend this was also an IE */ 3356 elems.ext_chansw_ie = 3357 &mgmt->u.action.u.ext_chan_switch.data; 3358 3359 ieee80211_sta_process_chanswitch(sdata, 3360 rx_status->mactime, 3361 &elems, false); 3362 } 3363 break; 3364 } 3365 sdata_unlock(sdata); 3366 } 3367 3368 static void ieee80211_sta_timer(unsigned long data) 3369 { 3370 struct ieee80211_sub_if_data *sdata = 3371 (struct ieee80211_sub_if_data *) data; 3372 3373 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3374 } 3375 3376 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 3377 u8 *bssid, u8 reason, bool tx) 3378 { 3379 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3380 3381 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 3382 tx, frame_buf); 3383 3384 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 3385 IEEE80211_DEAUTH_FRAME_LEN); 3386 } 3387 3388 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata) 3389 { 3390 struct ieee80211_local *local = sdata->local; 3391 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3392 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 3393 u32 tx_flags = 0; 3394 3395 sdata_assert_lock(sdata); 3396 3397 if (WARN_ON_ONCE(!auth_data)) 3398 return -EINVAL; 3399 3400 auth_data->tries++; 3401 3402 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 3403 sdata_info(sdata, "authentication with %pM timed out\n", 3404 auth_data->bss->bssid); 3405 3406 /* 3407 * Most likely AP is not in the range so remove the 3408 * bss struct for that AP. 3409 */ 3410 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 3411 3412 return -ETIMEDOUT; 3413 } 3414 3415 drv_mgd_prepare_tx(local, sdata); 3416 3417 if (auth_data->bss->proberesp_ies) { 3418 u16 trans = 1; 3419 u16 status = 0; 3420 3421 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 3422 auth_data->bss->bssid, auth_data->tries, 3423 IEEE80211_AUTH_MAX_TRIES); 3424 3425 auth_data->expected_transaction = 2; 3426 3427 if (auth_data->algorithm == WLAN_AUTH_SAE) { 3428 trans = auth_data->sae_trans; 3429 status = auth_data->sae_status; 3430 auth_data->expected_transaction = trans; 3431 } 3432 3433 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 3434 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3435 IEEE80211_TX_INTFL_MLME_CONN_TX; 3436 3437 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 3438 auth_data->data, auth_data->data_len, 3439 auth_data->bss->bssid, 3440 auth_data->bss->bssid, NULL, 0, 0, 3441 tx_flags); 3442 } else { 3443 const u8 *ssidie; 3444 3445 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n", 3446 auth_data->bss->bssid, auth_data->tries, 3447 IEEE80211_AUTH_MAX_TRIES); 3448 3449 rcu_read_lock(); 3450 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID); 3451 if (!ssidie) { 3452 rcu_read_unlock(); 3453 return -EINVAL; 3454 } 3455 /* 3456 * Direct probe is sent to broadcast address as some APs 3457 * will not answer to direct packet in unassociated state. 3458 */ 3459 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1], 3460 NULL, 0, (u32) -1, true, 0, 3461 auth_data->bss->channel, false); 3462 rcu_read_unlock(); 3463 } 3464 3465 if (tx_flags == 0) { 3466 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 3467 auth_data->timeout_started = true; 3468 run_again(sdata, auth_data->timeout); 3469 } else { 3470 auth_data->timeout = 3471 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 3472 auth_data->timeout_started = true; 3473 run_again(sdata, auth_data->timeout); 3474 } 3475 3476 return 0; 3477 } 3478 3479 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 3480 { 3481 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3482 struct ieee80211_local *local = sdata->local; 3483 3484 sdata_assert_lock(sdata); 3485 3486 assoc_data->tries++; 3487 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 3488 sdata_info(sdata, "association with %pM timed out\n", 3489 assoc_data->bss->bssid); 3490 3491 /* 3492 * Most likely AP is not in the range so remove the 3493 * bss struct for that AP. 3494 */ 3495 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 3496 3497 return -ETIMEDOUT; 3498 } 3499 3500 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 3501 assoc_data->bss->bssid, assoc_data->tries, 3502 IEEE80211_ASSOC_MAX_TRIES); 3503 ieee80211_send_assoc(sdata); 3504 3505 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) { 3506 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 3507 assoc_data->timeout_started = true; 3508 run_again(sdata, assoc_data->timeout); 3509 } else { 3510 assoc_data->timeout = 3511 round_jiffies_up(jiffies + 3512 IEEE80211_ASSOC_TIMEOUT_LONG); 3513 assoc_data->timeout_started = true; 3514 run_again(sdata, assoc_data->timeout); 3515 } 3516 3517 return 0; 3518 } 3519 3520 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 3521 __le16 fc, bool acked) 3522 { 3523 struct ieee80211_local *local = sdata->local; 3524 3525 sdata->u.mgd.status_fc = fc; 3526 sdata->u.mgd.status_acked = acked; 3527 sdata->u.mgd.status_received = true; 3528 3529 ieee80211_queue_work(&local->hw, &sdata->work); 3530 } 3531 3532 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 3533 { 3534 struct ieee80211_local *local = sdata->local; 3535 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3536 3537 sdata_lock(sdata); 3538 3539 if (ifmgd->status_received) { 3540 __le16 fc = ifmgd->status_fc; 3541 bool status_acked = ifmgd->status_acked; 3542 3543 ifmgd->status_received = false; 3544 if (ifmgd->auth_data && 3545 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) { 3546 if (status_acked) { 3547 ifmgd->auth_data->timeout = 3548 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; 3549 run_again(sdata, ifmgd->auth_data->timeout); 3550 } else { 3551 ifmgd->auth_data->timeout = jiffies - 1; 3552 } 3553 ifmgd->auth_data->timeout_started = true; 3554 } else if (ifmgd->assoc_data && 3555 (ieee80211_is_assoc_req(fc) || 3556 ieee80211_is_reassoc_req(fc))) { 3557 if (status_acked) { 3558 ifmgd->assoc_data->timeout = 3559 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 3560 run_again(sdata, ifmgd->assoc_data->timeout); 3561 } else { 3562 ifmgd->assoc_data->timeout = jiffies - 1; 3563 } 3564 ifmgd->assoc_data->timeout_started = true; 3565 } 3566 } 3567 3568 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 3569 time_after(jiffies, ifmgd->auth_data->timeout)) { 3570 if (ifmgd->auth_data->done) { 3571 /* 3572 * ok ... we waited for assoc but userspace didn't, 3573 * so let's just kill the auth data 3574 */ 3575 ieee80211_destroy_auth_data(sdata, false); 3576 } else if (ieee80211_probe_auth(sdata)) { 3577 u8 bssid[ETH_ALEN]; 3578 3579 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3580 3581 ieee80211_destroy_auth_data(sdata, false); 3582 3583 cfg80211_auth_timeout(sdata->dev, bssid); 3584 } 3585 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 3586 run_again(sdata, ifmgd->auth_data->timeout); 3587 3588 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 3589 time_after(jiffies, ifmgd->assoc_data->timeout)) { 3590 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 3591 ieee80211_do_assoc(sdata)) { 3592 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 3593 3594 ieee80211_destroy_assoc_data(sdata, false); 3595 cfg80211_assoc_timeout(sdata->dev, bss); 3596 } 3597 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 3598 run_again(sdata, ifmgd->assoc_data->timeout); 3599 3600 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 3601 ifmgd->associated) { 3602 u8 bssid[ETH_ALEN]; 3603 int max_tries; 3604 3605 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 3606 3607 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 3608 max_tries = max_nullfunc_tries; 3609 else 3610 max_tries = max_probe_tries; 3611 3612 /* ACK received for nullfunc probing frame */ 3613 if (!ifmgd->probe_send_count) 3614 ieee80211_reset_ap_probe(sdata); 3615 else if (ifmgd->nullfunc_failed) { 3616 if (ifmgd->probe_send_count < max_tries) { 3617 mlme_dbg(sdata, 3618 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 3619 bssid, ifmgd->probe_send_count, 3620 max_tries); 3621 ieee80211_mgd_probe_ap_send(sdata); 3622 } else { 3623 mlme_dbg(sdata, 3624 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 3625 bssid); 3626 ieee80211_sta_connection_lost(sdata, bssid, 3627 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3628 false); 3629 } 3630 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 3631 run_again(sdata, ifmgd->probe_timeout); 3632 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { 3633 mlme_dbg(sdata, 3634 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 3635 bssid, probe_wait_ms); 3636 ieee80211_sta_connection_lost(sdata, bssid, 3637 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3638 } else if (ifmgd->probe_send_count < max_tries) { 3639 mlme_dbg(sdata, 3640 "No probe response from AP %pM after %dms, try %d/%i\n", 3641 bssid, probe_wait_ms, 3642 ifmgd->probe_send_count, max_tries); 3643 ieee80211_mgd_probe_ap_send(sdata); 3644 } else { 3645 /* 3646 * We actually lost the connection ... or did we? 3647 * Let's make sure! 3648 */ 3649 wiphy_debug(local->hw.wiphy, 3650 "%s: No probe response from AP %pM" 3651 " after %dms, disconnecting.\n", 3652 sdata->name, 3653 bssid, probe_wait_ms); 3654 3655 ieee80211_sta_connection_lost(sdata, bssid, 3656 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3657 } 3658 } 3659 3660 sdata_unlock(sdata); 3661 } 3662 3663 static void ieee80211_sta_bcn_mon_timer(unsigned long data) 3664 { 3665 struct ieee80211_sub_if_data *sdata = 3666 (struct ieee80211_sub_if_data *) data; 3667 struct ieee80211_local *local = sdata->local; 3668 3669 if (local->quiescing) 3670 return; 3671 3672 if (sdata->vif.csa_active) 3673 return; 3674 3675 sdata->u.mgd.connection_loss = false; 3676 ieee80211_queue_work(&sdata->local->hw, 3677 &sdata->u.mgd.beacon_connection_loss_work); 3678 } 3679 3680 static void ieee80211_sta_conn_mon_timer(unsigned long data) 3681 { 3682 struct ieee80211_sub_if_data *sdata = 3683 (struct ieee80211_sub_if_data *) data; 3684 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3685 struct ieee80211_local *local = sdata->local; 3686 3687 if (local->quiescing) 3688 return; 3689 3690 if (sdata->vif.csa_active) 3691 return; 3692 3693 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 3694 } 3695 3696 static void ieee80211_sta_monitor_work(struct work_struct *work) 3697 { 3698 struct ieee80211_sub_if_data *sdata = 3699 container_of(work, struct ieee80211_sub_if_data, 3700 u.mgd.monitor_work); 3701 3702 ieee80211_mgd_probe_ap(sdata, false); 3703 } 3704 3705 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 3706 { 3707 u32 flags; 3708 3709 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 3710 __ieee80211_stop_poll(sdata); 3711 3712 /* let's probe the connection once */ 3713 flags = sdata->local->hw.flags; 3714 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR)) 3715 ieee80211_queue_work(&sdata->local->hw, 3716 &sdata->u.mgd.monitor_work); 3717 /* and do all the other regular work too */ 3718 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3719 } 3720 } 3721 3722 #ifdef CONFIG_PM 3723 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 3724 { 3725 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3726 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3727 3728 sdata_lock(sdata); 3729 3730 if (ifmgd->auth_data || ifmgd->assoc_data) { 3731 const u8 *bssid = ifmgd->auth_data ? 3732 ifmgd->auth_data->bss->bssid : 3733 ifmgd->assoc_data->bss->bssid; 3734 3735 /* 3736 * If we are trying to authenticate / associate while suspending, 3737 * cfg80211 won't know and won't actually abort those attempts, 3738 * thus we need to do that ourselves. 3739 */ 3740 ieee80211_send_deauth_disassoc(sdata, bssid, 3741 IEEE80211_STYPE_DEAUTH, 3742 WLAN_REASON_DEAUTH_LEAVING, 3743 false, frame_buf); 3744 if (ifmgd->assoc_data) 3745 ieee80211_destroy_assoc_data(sdata, false); 3746 if (ifmgd->auth_data) 3747 ieee80211_destroy_auth_data(sdata, false); 3748 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 3749 IEEE80211_DEAUTH_FRAME_LEN); 3750 } 3751 3752 sdata_unlock(sdata); 3753 } 3754 3755 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 3756 { 3757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3758 3759 sdata_lock(sdata); 3760 if (!ifmgd->associated) { 3761 sdata_unlock(sdata); 3762 return; 3763 } 3764 3765 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 3766 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 3767 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 3768 ieee80211_sta_connection_lost(sdata, 3769 ifmgd->associated->bssid, 3770 WLAN_REASON_UNSPECIFIED, 3771 true); 3772 sdata_unlock(sdata); 3773 return; 3774 } 3775 sdata_unlock(sdata); 3776 } 3777 #endif 3778 3779 /* interface setup */ 3780 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 3781 { 3782 struct ieee80211_if_managed *ifmgd; 3783 3784 ifmgd = &sdata->u.mgd; 3785 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 3786 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 3787 INIT_WORK(&ifmgd->beacon_connection_loss_work, 3788 ieee80211_beacon_connection_loss_work); 3789 INIT_WORK(&ifmgd->csa_connection_drop_work, 3790 ieee80211_csa_connection_drop_work); 3791 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 3792 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 3793 ieee80211_tdls_peer_del_work); 3794 setup_timer(&ifmgd->timer, ieee80211_sta_timer, 3795 (unsigned long) sdata); 3796 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 3797 (unsigned long) sdata); 3798 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 3799 (unsigned long) sdata); 3800 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 3801 (unsigned long) sdata); 3802 3803 ifmgd->flags = 0; 3804 ifmgd->powersave = sdata->wdev.ps; 3805 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 3806 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 3807 ifmgd->p2p_noa_index = -1; 3808 3809 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 3810 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 3811 else 3812 ifmgd->req_smps = IEEE80211_SMPS_OFF; 3813 } 3814 3815 /* scan finished notification */ 3816 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 3817 { 3818 struct ieee80211_sub_if_data *sdata; 3819 3820 /* Restart STA timers */ 3821 rcu_read_lock(); 3822 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 3823 if (ieee80211_sdata_running(sdata)) 3824 ieee80211_restart_sta_timer(sdata); 3825 } 3826 rcu_read_unlock(); 3827 } 3828 3829 int ieee80211_max_network_latency(struct notifier_block *nb, 3830 unsigned long data, void *dummy) 3831 { 3832 s32 latency_usec = (s32) data; 3833 struct ieee80211_local *local = 3834 container_of(nb, struct ieee80211_local, 3835 network_latency_notifier); 3836 3837 mutex_lock(&local->iflist_mtx); 3838 ieee80211_recalc_ps(local, latency_usec); 3839 mutex_unlock(&local->iflist_mtx); 3840 3841 return NOTIFY_OK; 3842 } 3843 3844 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 3845 struct cfg80211_bss *cbss) 3846 { 3847 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3848 const u8 *ht_cap_ie, *vht_cap_ie; 3849 const struct ieee80211_ht_cap *ht_cap; 3850 const struct ieee80211_vht_cap *vht_cap; 3851 u8 chains = 1; 3852 3853 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 3854 return chains; 3855 3856 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 3857 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 3858 ht_cap = (void *)(ht_cap_ie + 2); 3859 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 3860 /* 3861 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 3862 * "Tx Unequal Modulation Supported" fields. 3863 */ 3864 } 3865 3866 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 3867 return chains; 3868 3869 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 3870 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 3871 u8 nss; 3872 u16 tx_mcs_map; 3873 3874 vht_cap = (void *)(vht_cap_ie + 2); 3875 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 3876 for (nss = 8; nss > 0; nss--) { 3877 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 3878 IEEE80211_VHT_MCS_NOT_SUPPORTED) 3879 break; 3880 } 3881 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 3882 chains = max(chains, nss); 3883 } 3884 3885 return chains; 3886 } 3887 3888 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 3889 struct cfg80211_bss *cbss) 3890 { 3891 struct ieee80211_local *local = sdata->local; 3892 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3893 const struct ieee80211_ht_cap *ht_cap = NULL; 3894 const struct ieee80211_ht_operation *ht_oper = NULL; 3895 const struct ieee80211_vht_operation *vht_oper = NULL; 3896 struct ieee80211_supported_band *sband; 3897 struct cfg80211_chan_def chandef; 3898 int ret; 3899 3900 sband = local->hw.wiphy->bands[cbss->channel->band]; 3901 3902 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 3903 IEEE80211_STA_DISABLE_80P80MHZ | 3904 IEEE80211_STA_DISABLE_160MHZ); 3905 3906 rcu_read_lock(); 3907 3908 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3909 sband->ht_cap.ht_supported) { 3910 const u8 *ht_oper_ie, *ht_cap_ie; 3911 3912 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 3913 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 3914 ht_oper = (void *)(ht_oper_ie + 2); 3915 3916 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 3917 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 3918 ht_cap = (void *)(ht_cap_ie + 2); 3919 3920 if (!ht_cap) { 3921 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 3922 ht_oper = NULL; 3923 } 3924 } 3925 3926 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3927 sband->vht_cap.vht_supported) { 3928 const u8 *vht_oper_ie, *vht_cap; 3929 3930 vht_oper_ie = ieee80211_bss_get_ie(cbss, 3931 WLAN_EID_VHT_OPERATION); 3932 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 3933 vht_oper = (void *)(vht_oper_ie + 2); 3934 if (vht_oper && !ht_oper) { 3935 vht_oper = NULL; 3936 sdata_info(sdata, 3937 "AP advertised VHT without HT, disabling both\n"); 3938 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 3939 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 3940 } 3941 3942 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 3943 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 3944 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 3945 vht_oper = NULL; 3946 } 3947 } 3948 3949 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 3950 cbss->channel, 3951 ht_cap, ht_oper, vht_oper, 3952 &chandef, false); 3953 3954 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 3955 local->rx_chains); 3956 3957 rcu_read_unlock(); 3958 3959 /* will change later if needed */ 3960 sdata->smps_mode = IEEE80211_SMPS_OFF; 3961 3962 mutex_lock(&local->mtx); 3963 /* 3964 * If this fails (possibly due to channel context sharing 3965 * on incompatible channels, e.g. 80+80 and 160 sharing the 3966 * same control channel) try to use a smaller bandwidth. 3967 */ 3968 ret = ieee80211_vif_use_channel(sdata, &chandef, 3969 IEEE80211_CHANCTX_SHARED); 3970 3971 /* don't downgrade for 5 and 10 MHz channels, though. */ 3972 if (chandef.width == NL80211_CHAN_WIDTH_5 || 3973 chandef.width == NL80211_CHAN_WIDTH_10) 3974 goto out; 3975 3976 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 3977 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 3978 ret = ieee80211_vif_use_channel(sdata, &chandef, 3979 IEEE80211_CHANCTX_SHARED); 3980 } 3981 out: 3982 mutex_unlock(&local->mtx); 3983 return ret; 3984 } 3985 3986 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 3987 struct cfg80211_bss *cbss, bool assoc) 3988 { 3989 struct ieee80211_local *local = sdata->local; 3990 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3991 struct ieee80211_bss *bss = (void *)cbss->priv; 3992 struct sta_info *new_sta = NULL; 3993 bool have_sta = false; 3994 int err; 3995 3996 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 3997 return -EINVAL; 3998 3999 if (assoc) { 4000 rcu_read_lock(); 4001 have_sta = sta_info_get(sdata, cbss->bssid); 4002 rcu_read_unlock(); 4003 } 4004 4005 if (!have_sta) { 4006 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4007 if (!new_sta) 4008 return -ENOMEM; 4009 } 4010 if (new_sta) { 4011 u32 rates = 0, basic_rates = 0; 4012 bool have_higher_than_11mbit; 4013 int min_rate = INT_MAX, min_rate_index = -1; 4014 struct ieee80211_chanctx_conf *chanctx_conf; 4015 struct ieee80211_supported_band *sband; 4016 const struct cfg80211_bss_ies *ies; 4017 int shift; 4018 u32 rate_flags; 4019 4020 sband = local->hw.wiphy->bands[cbss->channel->band]; 4021 4022 err = ieee80211_prep_channel(sdata, cbss); 4023 if (err) { 4024 sta_info_free(local, new_sta); 4025 return -EINVAL; 4026 } 4027 shift = ieee80211_vif_get_shift(&sdata->vif); 4028 4029 rcu_read_lock(); 4030 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 4031 if (WARN_ON(!chanctx_conf)) { 4032 rcu_read_unlock(); 4033 sta_info_free(local, new_sta); 4034 return -EINVAL; 4035 } 4036 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 4037 rcu_read_unlock(); 4038 4039 ieee80211_get_rates(sband, bss->supp_rates, 4040 bss->supp_rates_len, 4041 &rates, &basic_rates, 4042 &have_higher_than_11mbit, 4043 &min_rate, &min_rate_index, 4044 shift, rate_flags); 4045 4046 /* 4047 * This used to be a workaround for basic rates missing 4048 * in the association response frame. Now that we no 4049 * longer use the basic rates from there, it probably 4050 * doesn't happen any more, but keep the workaround so 4051 * in case some *other* APs are buggy in different ways 4052 * we can connect -- with a warning. 4053 */ 4054 if (!basic_rates && min_rate_index >= 0) { 4055 sdata_info(sdata, 4056 "No basic rates, using min rate instead\n"); 4057 basic_rates = BIT(min_rate_index); 4058 } 4059 4060 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4061 sdata->vif.bss_conf.basic_rates = basic_rates; 4062 4063 /* cf. IEEE 802.11 9.2.12 */ 4064 if (cbss->channel->band == IEEE80211_BAND_2GHZ && 4065 have_higher_than_11mbit) 4066 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4067 else 4068 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4069 4070 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4071 4072 /* set timing information */ 4073 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4074 rcu_read_lock(); 4075 ies = rcu_dereference(cbss->beacon_ies); 4076 if (ies) { 4077 const u8 *tim_ie; 4078 4079 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4080 sdata->vif.bss_conf.sync_device_ts = 4081 bss->device_ts_beacon; 4082 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4083 ies->data, ies->len); 4084 if (tim_ie && tim_ie[1] >= 2) 4085 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4086 else 4087 sdata->vif.bss_conf.sync_dtim_count = 0; 4088 } else if (!(local->hw.flags & 4089 IEEE80211_HW_TIMING_BEACON_ONLY)) { 4090 ies = rcu_dereference(cbss->proberesp_ies); 4091 /* must be non-NULL since beacon IEs were NULL */ 4092 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4093 sdata->vif.bss_conf.sync_device_ts = 4094 bss->device_ts_presp; 4095 sdata->vif.bss_conf.sync_dtim_count = 0; 4096 } else { 4097 sdata->vif.bss_conf.sync_tsf = 0; 4098 sdata->vif.bss_conf.sync_device_ts = 0; 4099 sdata->vif.bss_conf.sync_dtim_count = 0; 4100 } 4101 rcu_read_unlock(); 4102 4103 /* tell driver about BSSID, basic rates and timing */ 4104 ieee80211_bss_info_change_notify(sdata, 4105 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4106 BSS_CHANGED_BEACON_INT); 4107 4108 if (assoc) 4109 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4110 4111 err = sta_info_insert(new_sta); 4112 new_sta = NULL; 4113 if (err) { 4114 sdata_info(sdata, 4115 "failed to insert STA entry for the AP (error %d)\n", 4116 err); 4117 return err; 4118 } 4119 } else 4120 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4121 4122 return 0; 4123 } 4124 4125 /* config hooks */ 4126 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4127 struct cfg80211_auth_request *req) 4128 { 4129 struct ieee80211_local *local = sdata->local; 4130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4131 struct ieee80211_mgd_auth_data *auth_data; 4132 u16 auth_alg; 4133 int err; 4134 4135 /* prepare auth data structure */ 4136 4137 switch (req->auth_type) { 4138 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4139 auth_alg = WLAN_AUTH_OPEN; 4140 break; 4141 case NL80211_AUTHTYPE_SHARED_KEY: 4142 if (IS_ERR(local->wep_tx_tfm)) 4143 return -EOPNOTSUPP; 4144 auth_alg = WLAN_AUTH_SHARED_KEY; 4145 break; 4146 case NL80211_AUTHTYPE_FT: 4147 auth_alg = WLAN_AUTH_FT; 4148 break; 4149 case NL80211_AUTHTYPE_NETWORK_EAP: 4150 auth_alg = WLAN_AUTH_LEAP; 4151 break; 4152 case NL80211_AUTHTYPE_SAE: 4153 auth_alg = WLAN_AUTH_SAE; 4154 break; 4155 default: 4156 return -EOPNOTSUPP; 4157 } 4158 4159 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len + 4160 req->ie_len, GFP_KERNEL); 4161 if (!auth_data) 4162 return -ENOMEM; 4163 4164 auth_data->bss = req->bss; 4165 4166 if (req->sae_data_len >= 4) { 4167 __le16 *pos = (__le16 *) req->sae_data; 4168 auth_data->sae_trans = le16_to_cpu(pos[0]); 4169 auth_data->sae_status = le16_to_cpu(pos[1]); 4170 memcpy(auth_data->data, req->sae_data + 4, 4171 req->sae_data_len - 4); 4172 auth_data->data_len += req->sae_data_len - 4; 4173 } 4174 4175 if (req->ie && req->ie_len) { 4176 memcpy(&auth_data->data[auth_data->data_len], 4177 req->ie, req->ie_len); 4178 auth_data->data_len += req->ie_len; 4179 } 4180 4181 if (req->key && req->key_len) { 4182 auth_data->key_len = req->key_len; 4183 auth_data->key_idx = req->key_idx; 4184 memcpy(auth_data->key, req->key, req->key_len); 4185 } 4186 4187 auth_data->algorithm = auth_alg; 4188 4189 /* try to authenticate/probe */ 4190 4191 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4192 ifmgd->assoc_data) { 4193 err = -EBUSY; 4194 goto err_free; 4195 } 4196 4197 if (ifmgd->auth_data) 4198 ieee80211_destroy_auth_data(sdata, false); 4199 4200 /* prep auth_data so we don't go into idle on disassoc */ 4201 ifmgd->auth_data = auth_data; 4202 4203 if (ifmgd->associated) { 4204 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4205 4206 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4207 WLAN_REASON_UNSPECIFIED, 4208 false, frame_buf); 4209 4210 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4211 sizeof(frame_buf)); 4212 } 4213 4214 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4215 4216 err = ieee80211_prep_connection(sdata, req->bss, false); 4217 if (err) 4218 goto err_clear; 4219 4220 err = ieee80211_probe_auth(sdata); 4221 if (err) { 4222 sta_info_destroy_addr(sdata, req->bss->bssid); 4223 goto err_clear; 4224 } 4225 4226 /* hold our own reference */ 4227 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4228 return 0; 4229 4230 err_clear: 4231 memset(ifmgd->bssid, 0, ETH_ALEN); 4232 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4233 ifmgd->auth_data = NULL; 4234 err_free: 4235 kfree(auth_data); 4236 return err; 4237 } 4238 4239 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata, 4240 const u8 *wmm_param, int len) 4241 { 4242 const u8 *pos; 4243 size_t left; 4244 4245 if (len < 8) 4246 return false; 4247 4248 if (wmm_param[5] != 1 /* version */) 4249 return false; 4250 4251 pos = wmm_param + 8; 4252 left = len - 8; 4253 4254 for (; left >= 4; left -= 4, pos += 4) { 4255 u8 aifsn = pos[0] & 0x0f; 4256 u8 ecwmin = pos[1] & 0x0f; 4257 u8 ecwmax = (pos[1] & 0xf0) >> 4; 4258 int aci = (pos[0] >> 5) & 0x03; 4259 4260 if (aifsn < 2) { 4261 sdata_info(sdata, 4262 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n", 4263 aifsn, aci); 4264 return false; 4265 } 4266 if (ecwmin > ecwmax) { 4267 sdata_info(sdata, 4268 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n", 4269 ecwmin, ecwmax, aci); 4270 return false; 4271 } 4272 } 4273 4274 return true; 4275 } 4276 4277 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 4278 struct cfg80211_assoc_request *req) 4279 { 4280 struct ieee80211_local *local = sdata->local; 4281 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4282 struct ieee80211_bss *bss = (void *)req->bss->priv; 4283 struct ieee80211_mgd_assoc_data *assoc_data; 4284 const struct cfg80211_bss_ies *beacon_ies; 4285 struct ieee80211_supported_band *sband; 4286 const u8 *ssidie, *ht_ie, *vht_ie; 4287 int i, err; 4288 4289 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 4290 if (!assoc_data) 4291 return -ENOMEM; 4292 4293 rcu_read_lock(); 4294 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 4295 if (!ssidie) { 4296 rcu_read_unlock(); 4297 kfree(assoc_data); 4298 return -EINVAL; 4299 } 4300 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 4301 assoc_data->ssid_len = ssidie[1]; 4302 rcu_read_unlock(); 4303 4304 if (ifmgd->associated) { 4305 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4306 4307 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4308 WLAN_REASON_UNSPECIFIED, 4309 false, frame_buf); 4310 4311 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4312 sizeof(frame_buf)); 4313 } 4314 4315 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 4316 err = -EBUSY; 4317 goto err_free; 4318 } 4319 4320 if (ifmgd->assoc_data) { 4321 err = -EBUSY; 4322 goto err_free; 4323 } 4324 4325 if (ifmgd->auth_data) { 4326 bool match; 4327 4328 /* keep sta info, bssid if matching */ 4329 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 4330 ieee80211_destroy_auth_data(sdata, match); 4331 } 4332 4333 /* prepare assoc data */ 4334 4335 ifmgd->beacon_crc_valid = false; 4336 4337 assoc_data->wmm = bss->wmm_used && 4338 (local->hw.queues >= IEEE80211_NUM_ACS); 4339 if (assoc_data->wmm) { 4340 /* try to check validity of WMM params IE */ 4341 const struct cfg80211_bss_ies *ies; 4342 const u8 *wp, *start, *end; 4343 4344 rcu_read_lock(); 4345 ies = rcu_dereference(req->bss->ies); 4346 start = ies->data; 4347 end = start + ies->len; 4348 4349 while (true) { 4350 wp = cfg80211_find_vendor_ie( 4351 WLAN_OUI_MICROSOFT, 4352 WLAN_OUI_TYPE_MICROSOFT_WMM, 4353 start, end - start); 4354 if (!wp) 4355 break; 4356 start = wp + wp[1] + 2; 4357 /* if this IE is too short, try the next */ 4358 if (wp[1] <= 4) 4359 continue; 4360 /* if this IE is WMM params, we found what we wanted */ 4361 if (wp[6] == 1) 4362 break; 4363 } 4364 4365 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2, 4366 wp[1] - 2)) { 4367 assoc_data->wmm = false; 4368 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 4369 } 4370 rcu_read_unlock(); 4371 } 4372 4373 /* 4374 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 4375 * We still associate in non-HT mode (11a/b/g) if any one of these 4376 * ciphers is configured as pairwise. 4377 * We can set this to true for non-11n hardware, that'll be checked 4378 * separately along with the peer capabilities. 4379 */ 4380 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4381 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4382 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4383 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4384 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4385 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4386 netdev_info(sdata->dev, 4387 "disabling HT/VHT due to WEP/TKIP use\n"); 4388 } 4389 } 4390 4391 if (req->flags & ASSOC_REQ_DISABLE_HT) { 4392 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4393 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4394 } 4395 4396 if (req->flags & ASSOC_REQ_DISABLE_VHT) 4397 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4398 4399 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 4400 sband = local->hw.wiphy->bands[req->bss->channel->band]; 4401 if (!sband->ht_cap.ht_supported || 4402 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4403 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4404 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4405 if (!bss->wmm_used && 4406 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4407 netdev_info(sdata->dev, 4408 "disabling HT as WMM/QoS is not supported by the AP\n"); 4409 } 4410 4411 /* disable VHT if we don't support it or the AP doesn't use WMM */ 4412 if (!sband->vht_cap.vht_supported || 4413 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4414 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4415 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4416 if (!bss->wmm_used && 4417 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4418 netdev_info(sdata->dev, 4419 "disabling VHT as WMM/QoS is not supported by the AP\n"); 4420 } 4421 4422 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 4423 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 4424 sizeof(ifmgd->ht_capa_mask)); 4425 4426 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 4427 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 4428 sizeof(ifmgd->vht_capa_mask)); 4429 4430 if (req->ie && req->ie_len) { 4431 memcpy(assoc_data->ie, req->ie, req->ie_len); 4432 assoc_data->ie_len = req->ie_len; 4433 } 4434 4435 assoc_data->bss = req->bss; 4436 4437 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 4438 if (ifmgd->powersave) 4439 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 4440 else 4441 sdata->smps_mode = IEEE80211_SMPS_OFF; 4442 } else 4443 sdata->smps_mode = ifmgd->req_smps; 4444 4445 assoc_data->capability = req->bss->capability; 4446 assoc_data->supp_rates = bss->supp_rates; 4447 assoc_data->supp_rates_len = bss->supp_rates_len; 4448 4449 rcu_read_lock(); 4450 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 4451 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 4452 assoc_data->ap_ht_param = 4453 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 4454 else 4455 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4456 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 4457 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 4458 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 4459 sizeof(struct ieee80211_vht_cap)); 4460 else 4461 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4462 rcu_read_unlock(); 4463 4464 if (bss->wmm_used && bss->uapsd_supported && 4465 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) { 4466 assoc_data->uapsd = true; 4467 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 4468 } else { 4469 assoc_data->uapsd = false; 4470 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 4471 } 4472 4473 if (req->prev_bssid) 4474 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 4475 4476 if (req->use_mfp) { 4477 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 4478 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 4479 } else { 4480 ifmgd->mfp = IEEE80211_MFP_DISABLED; 4481 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 4482 } 4483 4484 if (req->flags & ASSOC_REQ_USE_RRM) 4485 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 4486 else 4487 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 4488 4489 if (req->crypto.control_port) 4490 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 4491 else 4492 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 4493 4494 sdata->control_port_protocol = req->crypto.control_port_ethertype; 4495 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 4496 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 4497 sdata->vif.type); 4498 4499 /* kick off associate process */ 4500 4501 ifmgd->assoc_data = assoc_data; 4502 ifmgd->dtim_period = 0; 4503 ifmgd->have_beacon = false; 4504 4505 err = ieee80211_prep_connection(sdata, req->bss, true); 4506 if (err) 4507 goto err_clear; 4508 4509 rcu_read_lock(); 4510 beacon_ies = rcu_dereference(req->bss->beacon_ies); 4511 4512 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC && 4513 !beacon_ies) { 4514 /* 4515 * Wait up to one beacon interval ... 4516 * should this be more if we miss one? 4517 */ 4518 sdata_info(sdata, "waiting for beacon from %pM\n", 4519 ifmgd->bssid); 4520 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 4521 assoc_data->timeout_started = true; 4522 assoc_data->need_beacon = true; 4523 } else if (beacon_ies) { 4524 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4525 beacon_ies->data, 4526 beacon_ies->len); 4527 u8 dtim_count = 0; 4528 4529 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 4530 const struct ieee80211_tim_ie *tim; 4531 tim = (void *)(tim_ie + 2); 4532 ifmgd->dtim_period = tim->dtim_period; 4533 dtim_count = tim->dtim_count; 4534 } 4535 ifmgd->have_beacon = true; 4536 assoc_data->timeout = jiffies; 4537 assoc_data->timeout_started = true; 4538 4539 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { 4540 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 4541 sdata->vif.bss_conf.sync_device_ts = 4542 bss->device_ts_beacon; 4543 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 4544 } 4545 } else { 4546 assoc_data->timeout = jiffies; 4547 assoc_data->timeout_started = true; 4548 } 4549 rcu_read_unlock(); 4550 4551 run_again(sdata, assoc_data->timeout); 4552 4553 if (bss->corrupt_data) { 4554 char *corrupt_type = "data"; 4555 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 4556 if (bss->corrupt_data & 4557 IEEE80211_BSS_CORRUPT_PROBE_RESP) 4558 corrupt_type = "beacon and probe response"; 4559 else 4560 corrupt_type = "beacon"; 4561 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 4562 corrupt_type = "probe response"; 4563 sdata_info(sdata, "associating with AP with corrupt %s\n", 4564 corrupt_type); 4565 } 4566 4567 return 0; 4568 err_clear: 4569 memset(ifmgd->bssid, 0, ETH_ALEN); 4570 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4571 ifmgd->assoc_data = NULL; 4572 err_free: 4573 kfree(assoc_data); 4574 return err; 4575 } 4576 4577 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 4578 struct cfg80211_deauth_request *req) 4579 { 4580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4581 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4582 bool tx = !req->local_state_change; 4583 4584 if (ifmgd->auth_data && 4585 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 4586 sdata_info(sdata, 4587 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 4588 req->bssid, req->reason_code, 4589 ieee80211_get_reason_code_string(req->reason_code)); 4590 4591 drv_mgd_prepare_tx(sdata->local, sdata); 4592 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4593 IEEE80211_STYPE_DEAUTH, 4594 req->reason_code, tx, 4595 frame_buf); 4596 ieee80211_destroy_auth_data(sdata, false); 4597 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4598 IEEE80211_DEAUTH_FRAME_LEN); 4599 4600 return 0; 4601 } 4602 4603 if (ifmgd->associated && 4604 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 4605 sdata_info(sdata, 4606 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 4607 req->bssid, req->reason_code, 4608 ieee80211_get_reason_code_string(req->reason_code)); 4609 4610 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4611 req->reason_code, tx, frame_buf); 4612 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4613 IEEE80211_DEAUTH_FRAME_LEN); 4614 return 0; 4615 } 4616 4617 return -ENOTCONN; 4618 } 4619 4620 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 4621 struct cfg80211_disassoc_request *req) 4622 { 4623 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4624 u8 bssid[ETH_ALEN]; 4625 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4626 4627 /* 4628 * cfg80211 should catch this ... but it's racy since 4629 * we can receive a disassoc frame, process it, hand it 4630 * to cfg80211 while that's in a locked section already 4631 * trying to tell us that the user wants to disconnect. 4632 */ 4633 if (ifmgd->associated != req->bss) 4634 return -ENOLINK; 4635 4636 sdata_info(sdata, 4637 "disassociating from %pM by local choice (Reason: %u=%s)\n", 4638 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 4639 4640 memcpy(bssid, req->bss->bssid, ETH_ALEN); 4641 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 4642 req->reason_code, !req->local_state_change, 4643 frame_buf); 4644 4645 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4646 IEEE80211_DEAUTH_FRAME_LEN); 4647 4648 return 0; 4649 } 4650 4651 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 4652 { 4653 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4654 4655 /* 4656 * Make sure some work items will not run after this, 4657 * they will not do anything but might not have been 4658 * cancelled when disconnecting. 4659 */ 4660 cancel_work_sync(&ifmgd->monitor_work); 4661 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 4662 cancel_work_sync(&ifmgd->request_smps_work); 4663 cancel_work_sync(&ifmgd->csa_connection_drop_work); 4664 cancel_work_sync(&ifmgd->chswitch_work); 4665 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 4666 4667 sdata_lock(sdata); 4668 if (ifmgd->assoc_data) { 4669 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4670 ieee80211_destroy_assoc_data(sdata, false); 4671 cfg80211_assoc_timeout(sdata->dev, bss); 4672 } 4673 if (ifmgd->auth_data) 4674 ieee80211_destroy_auth_data(sdata, false); 4675 del_timer_sync(&ifmgd->timer); 4676 sdata_unlock(sdata); 4677 } 4678 4679 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 4680 enum nl80211_cqm_rssi_threshold_event rssi_event, 4681 gfp_t gfp) 4682 { 4683 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4684 4685 trace_api_cqm_rssi_notify(sdata, rssi_event); 4686 4687 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); 4688 } 4689 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 4690