| 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * BSS client mode implementation |
| 4 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
| 5 | * Copyright 2004, Instant802 Networks, Inc. |
| 6 | * Copyright 2005, Devicescape Software, Inc. |
| 7 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| 8 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> |
| 9 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
| 10 | * Copyright (C) 2015 - 2017 Intel Deutschland GmbH |
| 11 | * Copyright (C) 2018 - 2024 Intel Corporation |
| 12 | */ |
| 13 | |
| 14 | #include <linux/delay.h> |
| 15 | #include <linux/fips.h> |
| 16 | #include <linux/if_ether.h> |
| 17 | #include <linux/skbuff.h> |
| 18 | #include <linux/if_arp.h> |
| 19 | #include <linux/etherdevice.h> |
| 20 | #include <linux/moduleparam.h> |
| 21 | #include <linux/rtnetlink.h> |
| 22 | #include <linux/crc32.h> |
| 23 | #include <linux/slab.h> |
| 24 | #include <linux/export.h> |
| 25 | #include <net/mac80211.h> |
| 26 | #include <asm/unaligned.h> |
| 27 | |
| 28 | #include "ieee80211_i.h" |
| 29 | #include "driver-ops.h" |
| 30 | #include "rate.h" |
| 31 | #include "led.h" |
| 32 | #include "fils_aead.h" |
| 33 | |
| 34 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
| 35 | #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) |
| 36 | #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) |
| 37 | #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) |
| 38 | #define IEEE80211_AUTH_MAX_TRIES 3 |
| 39 | #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) |
| 40 | #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) |
| 41 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) |
| 42 | #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) |
| 43 | #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) |
| 44 | #define IEEE80211_ASSOC_MAX_TRIES 3 |
| 45 | |
| 46 | #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100) |
| 47 | #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 |
| 48 | |
| 49 | #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) |
| 50 | |
| 51 | static int max_nullfunc_tries = 2; |
| 52 | module_param(max_nullfunc_tries, int, 0644); |
| 53 | MODULE_PARM_DESC(max_nullfunc_tries, |
| 54 | "Maximum nullfunc tx tries before disconnecting (reason 4)."); |
| 55 | |
| 56 | static int max_probe_tries = 5; |
| 57 | module_param(max_probe_tries, int, 0644); |
| 58 | MODULE_PARM_DESC(max_probe_tries, |
| 59 | "Maximum probe tries before disconnecting (reason 4)."); |
| 60 | |
| 61 | /* |
| 62 | * Beacon loss timeout is calculated as N frames times the |
| 63 | * advertised beacon interval. This may need to be somewhat |
| 64 | * higher than what hardware might detect to account for |
| 65 | * delays in the host processing frames. But since we also |
| 66 | * probe on beacon miss before declaring the connection lost |
| 67 | * default to what we want. |
| 68 | */ |
| 69 | static int beacon_loss_count = 7; |
| 70 | module_param(beacon_loss_count, int, 0644); |
| 71 | MODULE_PARM_DESC(beacon_loss_count, |
| 72 | "Number of beacon intervals before we decide beacon was lost."); |
| 73 | |
| 74 | /* |
| 75 | * Time the connection can be idle before we probe |
| 76 | * it to see if we can still talk to the AP. |
| 77 | */ |
| 78 | #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) |
| 79 | /* |
| 80 | * Time we wait for a probe response after sending |
| 81 | * a probe request because of beacon loss or for |
| 82 | * checking the connection still works. |
| 83 | */ |
| 84 | static int probe_wait_ms = 500; |
| 85 | module_param(probe_wait_ms, int, 0644); |
| 86 | MODULE_PARM_DESC(probe_wait_ms, |
| 87 | "Maximum time(ms) to wait for probe response" |
| 88 | " before disconnecting (reason 4)."); |
| 89 | |
| 90 | /* |
| 91 | * How many Beacon frames need to have been used in average signal strength |
| 92 | * before starting to indicate signal change events. |
| 93 | */ |
| 94 | #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 |
| 95 | |
| 96 | /* |
| 97 | * We can have multiple work items (and connection probing) |
| 98 | * scheduling this timer, but we need to take care to only |
| 99 | * reschedule it when it should fire _earlier_ than it was |
| 100 | * asked for before, or if it's not pending right now. This |
| 101 | * function ensures that. Note that it then is required to |
| 102 | * run this function for all timeouts after the first one |
| 103 | * has happened -- the work that runs from this timer will |
| 104 | * do that. |
| 105 | */ |
| 106 | static void run_again(struct ieee80211_sub_if_data *sdata, |
| 107 | unsigned long timeout) |
| 108 | { |
| 109 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 110 | |
| 111 | if (!timer_pending(&sdata->u.mgd.timer) || |
| 112 | time_before(timeout, sdata->u.mgd.timer.expires)) |
| 113 | mod_timer(&sdata->u.mgd.timer, timeout); |
| 114 | } |
| 115 | |
| 116 | void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) |
| 117 | { |
| 118 | if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) |
| 119 | return; |
| 120 | |
| 121 | if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) |
| 122 | return; |
| 123 | |
| 124 | mod_timer(&sdata->u.mgd.bcn_mon_timer, |
| 125 | round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); |
| 126 | } |
| 127 | |
| 128 | void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) |
| 129 | { |
| 130 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 131 | |
| 132 | if (unlikely(!ifmgd->associated)) |
| 133 | return; |
| 134 | |
| 135 | if (ifmgd->probe_send_count) |
| 136 | ifmgd->probe_send_count = 0; |
| 137 | |
| 138 | if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) |
| 139 | return; |
| 140 | |
| 141 | mod_timer(&ifmgd->conn_mon_timer, |
| 142 | round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); |
| 143 | } |
| 144 | |
| 145 | static int ecw2cw(int ecw) |
| 146 | { |
| 147 | return (1 << ecw) - 1; |
| 148 | } |
| 149 | |
| 150 | static enum ieee80211_conn_mode |
| 151 | ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, |
| 152 | struct ieee80211_channel *channel, |
| 153 | u32 vht_cap_info, |
| 154 | const struct ieee802_11_elems *elems, |
| 155 | bool ignore_ht_channel_mismatch, |
| 156 | const struct ieee80211_conn_settings *conn, |
| 157 | struct cfg80211_chan_def *chandef) |
| 158 | { |
| 159 | const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; |
| 160 | const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; |
| 161 | const struct ieee80211_he_operation *he_oper = elems->he_operation; |
| 162 | const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; |
| 163 | struct ieee80211_supported_band *sband = |
| 164 | sdata->local->hw.wiphy->bands[channel->band]; |
| 165 | struct cfg80211_chan_def vht_chandef; |
| 166 | bool no_vht = false; |
| 167 | u32 ht_cfreq; |
| 168 | |
| 169 | *chandef = (struct cfg80211_chan_def) { |
| 170 | .chan = channel, |
| 171 | .width = NL80211_CHAN_WIDTH_20_NOHT, |
| 172 | .center_freq1 = channel->center_freq, |
| 173 | .freq1_offset = channel->freq_offset, |
| 174 | }; |
| 175 | |
| 176 | /* get special S1G case out of the way */ |
| 177 | if (sband->band == NL80211_BAND_S1GHZ) { |
| 178 | if (!ieee80211_chandef_s1g_oper(elems->s1g_oper, chandef)) { |
| 179 | sdata_info(sdata, |
| 180 | "Missing S1G Operation Element? Trying operating == primary\n"); |
| 181 | chandef->width = ieee80211_s1g_channel_width(channel); |
| 182 | } |
| 183 | |
| 184 | return IEEE80211_CONN_MODE_S1G; |
| 185 | } |
| 186 | |
| 187 | /* get special 6 GHz case out of the way */ |
| 188 | if (sband->band == NL80211_BAND_6GHZ) { |
| 189 | enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; |
| 190 | |
| 191 | /* this is an error */ |
| 192 | if (conn->mode < IEEE80211_CONN_MODE_HE) |
| 193 | return IEEE80211_CONN_MODE_LEGACY; |
| 194 | |
| 195 | if (!elems->he_6ghz_capa || !elems->he_cap) { |
| 196 | sdata_info(sdata, |
| 197 | "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); |
| 198 | return IEEE80211_CONN_MODE_LEGACY; |
| 199 | } |
| 200 | |
| 201 | if (!eht_oper || !elems->eht_cap) { |
| 202 | eht_oper = NULL; |
| 203 | mode = IEEE80211_CONN_MODE_HE; |
| 204 | } |
| 205 | |
| 206 | if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, |
| 207 | eht_oper, chandef)) { |
| 208 | sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); |
| 209 | return IEEE80211_CONN_MODE_LEGACY; |
| 210 | } |
| 211 | |
| 212 | return mode; |
| 213 | } |
| 214 | |
| 215 | /* now we have the progression HT, VHT, ... */ |
| 216 | if (conn->mode < IEEE80211_CONN_MODE_HT) |
| 217 | return IEEE80211_CONN_MODE_LEGACY; |
| 218 | |
| 219 | if (!ht_oper || !elems->ht_cap_elem) |
| 220 | return IEEE80211_CONN_MODE_LEGACY; |
| 221 | |
| 222 | chandef->width = NL80211_CHAN_WIDTH_20; |
| 223 | |
| 224 | ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, |
| 225 | channel->band); |
| 226 | /* check that channel matches the right operating channel */ |
| 227 | if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { |
| 228 | /* |
| 229 | * It's possible that some APs are confused here; |
| 230 | * Netgear WNDR3700 sometimes reports 4 higher than |
| 231 | * the actual channel in association responses, but |
| 232 | * since we look at probe response/beacon data here |
| 233 | * it should be OK. |
| 234 | */ |
| 235 | sdata_info(sdata, |
| 236 | "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", |
| 237 | channel->center_freq, ht_cfreq, |
| 238 | ht_oper->primary_chan, channel->band); |
| 239 | return IEEE80211_CONN_MODE_LEGACY; |
| 240 | } |
| 241 | |
| 242 | ieee80211_chandef_ht_oper(ht_oper, chandef); |
| 243 | |
| 244 | if (conn->mode < IEEE80211_CONN_MODE_VHT) |
| 245 | return IEEE80211_CONN_MODE_HT; |
| 246 | |
| 247 | vht_chandef = *chandef; |
| 248 | |
| 249 | /* |
| 250 | * having he_cap/he_oper parsed out implies we're at |
| 251 | * least operating as HE STA |
| 252 | */ |
| 253 | if (elems->he_cap && he_oper && |
| 254 | he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { |
| 255 | struct ieee80211_vht_operation he_oper_vht_cap; |
| 256 | |
| 257 | /* |
| 258 | * Set only first 3 bytes (other 2 aren't used in |
| 259 | * ieee80211_chandef_vht_oper() anyway) |
| 260 | */ |
| 261 | memcpy(&he_oper_vht_cap, he_oper->optional, 3); |
| 262 | he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); |
| 263 | |
| 264 | if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, |
| 265 | &he_oper_vht_cap, ht_oper, |
| 266 | &vht_chandef)) { |
| 267 | sdata_info(sdata, |
| 268 | "HE AP VHT information is invalid, disabling HE\n"); |
| 269 | /* this will cause us to re-parse as VHT STA */ |
| 270 | return IEEE80211_CONN_MODE_VHT; |
| 271 | } |
| 272 | } else if (!vht_oper || !elems->vht_cap_elem) { |
| 273 | if (sband->band == NL80211_BAND_5GHZ) { |
| 274 | sdata_info(sdata, |
| 275 | "VHT information is missing, disabling VHT\n"); |
| 276 | return IEEE80211_CONN_MODE_HT; |
| 277 | } |
| 278 | no_vht = true; |
| 279 | } else if (sband->band == NL80211_BAND_2GHZ) { |
| 280 | no_vht = true; |
| 281 | } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, |
| 282 | vht_cap_info, |
| 283 | vht_oper, ht_oper, |
| 284 | &vht_chandef)) { |
| 285 | sdata_info(sdata, |
| 286 | "AP VHT information is invalid, disabling VHT\n"); |
| 287 | return IEEE80211_CONN_MODE_HT; |
| 288 | } |
| 289 | |
| 290 | if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { |
| 291 | sdata_info(sdata, |
| 292 | "AP VHT information doesn't match HT, disabling VHT\n"); |
| 293 | return IEEE80211_CONN_MODE_HT; |
| 294 | } |
| 295 | |
| 296 | *chandef = vht_chandef; |
| 297 | |
| 298 | /* stick to current max mode if we or the AP don't have HE */ |
| 299 | if (conn->mode < IEEE80211_CONN_MODE_HE || |
| 300 | !elems->he_operation || !elems->he_cap) { |
| 301 | if (no_vht) |
| 302 | return IEEE80211_CONN_MODE_HT; |
| 303 | return IEEE80211_CONN_MODE_VHT; |
| 304 | } |
| 305 | |
| 306 | /* stick to HE if we or the AP don't have EHT */ |
| 307 | if (conn->mode < IEEE80211_CONN_MODE_EHT || |
| 308 | !eht_oper || !elems->eht_cap) |
| 309 | return IEEE80211_CONN_MODE_HE; |
| 310 | |
| 311 | /* |
| 312 | * handle the case that the EHT operation indicates that it holds EHT |
| 313 | * operation information (in case that the channel width differs from |
| 314 | * the channel width reported in HT/VHT/HE). |
| 315 | */ |
| 316 | if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { |
| 317 | struct cfg80211_chan_def eht_chandef = *chandef; |
| 318 | |
| 319 | ieee80211_chandef_eht_oper((const void *)eht_oper->optional, |
| 320 | &eht_chandef); |
| 321 | |
| 322 | eht_chandef.punctured = |
| 323 | ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); |
| 324 | |
| 325 | if (!cfg80211_chandef_valid(&eht_chandef)) { |
| 326 | sdata_info(sdata, |
| 327 | "AP EHT information is invalid, disabling EHT\n"); |
| 328 | return IEEE80211_CONN_MODE_HE; |
| 329 | } |
| 330 | |
| 331 | if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { |
| 332 | sdata_info(sdata, |
| 333 | "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); |
| 334 | return IEEE80211_CONN_MODE_HE; |
| 335 | } |
| 336 | |
| 337 | *chandef = eht_chandef; |
| 338 | } |
| 339 | |
| 340 | return IEEE80211_CONN_MODE_EHT; |
| 341 | } |
| 342 | |
| 343 | static bool |
| 344 | ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, |
| 345 | const struct ieee80211_he_cap_elem *he_cap, |
| 346 | const struct ieee80211_he_operation *he_op) |
| 347 | { |
| 348 | struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; |
| 349 | u16 mcs_80_map_tx, mcs_80_map_rx; |
| 350 | u16 ap_min_req_set; |
| 351 | int nss; |
| 352 | |
| 353 | if (!he_cap) |
| 354 | return false; |
| 355 | |
| 356 | /* mcs_nss is right after he_cap info */ |
| 357 | he_mcs_nss_supp = (void *)(he_cap + 1); |
| 358 | |
| 359 | mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); |
| 360 | mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); |
| 361 | |
| 362 | /* P802.11-REVme/D0.3 |
| 363 | * 27.1.1 Introduction to the HE PHY |
| 364 | * ... |
| 365 | * An HE STA shall support the following features: |
| 366 | * ... |
| 367 | * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all |
| 368 | * supported channel widths for HE SU PPDUs |
| 369 | */ |
| 370 | if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || |
| 371 | (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { |
| 372 | sdata_info(sdata, |
| 373 | "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", |
| 374 | mcs_80_map_tx, mcs_80_map_rx); |
| 375 | return false; |
| 376 | } |
| 377 | |
| 378 | if (!he_op) |
| 379 | return true; |
| 380 | |
| 381 | ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); |
| 382 | |
| 383 | /* |
| 384 | * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all |
| 385 | * zeroes, which is nonsense, and completely inconsistent with itself |
| 386 | * (it doesn't have 8 streams). Accept the settings in this case anyway. |
| 387 | */ |
| 388 | if (!ap_min_req_set) |
| 389 | return true; |
| 390 | |
| 391 | /* make sure the AP is consistent with itself |
| 392 | * |
| 393 | * P802.11-REVme/D0.3 |
| 394 | * 26.17.1 Basic HE BSS operation |
| 395 | * |
| 396 | * A STA that is operating in an HE BSS shall be able to receive and |
| 397 | * transmit at each of the <HE-MCS, NSS> tuple values indicated by the |
| 398 | * Basic HE-MCS And NSS Set field of the HE Operation parameter of the |
| 399 | * MLME-START.request primitive and shall be able to receive at each of |
| 400 | * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and |
| 401 | * NSS Set field in the HE Capabilities parameter of the MLMESTART.request |
| 402 | * primitive |
| 403 | */ |
| 404 | for (nss = 8; nss > 0; nss--) { |
| 405 | u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; |
| 406 | u8 ap_rx_val; |
| 407 | u8 ap_tx_val; |
| 408 | |
| 409 | if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) |
| 410 | continue; |
| 411 | |
| 412 | ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; |
| 413 | ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; |
| 414 | |
| 415 | if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || |
| 416 | ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || |
| 417 | ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { |
| 418 | sdata_info(sdata, |
| 419 | "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", |
| 420 | nss, ap_rx_val, ap_rx_val, ap_op_val); |
| 421 | return false; |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | return true; |
| 426 | } |
| 427 | |
| 428 | static bool |
| 429 | ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, |
| 430 | struct ieee80211_supported_band *sband, |
| 431 | const struct ieee80211_he_operation *he_op) |
| 432 | { |
| 433 | const struct ieee80211_sta_he_cap *sta_he_cap = |
| 434 | ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); |
| 435 | u16 ap_min_req_set; |
| 436 | int i; |
| 437 | |
| 438 | if (!sta_he_cap || !he_op) |
| 439 | return false; |
| 440 | |
| 441 | ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); |
| 442 | |
| 443 | /* |
| 444 | * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all |
| 445 | * zeroes, which is nonsense, and completely inconsistent with itself |
| 446 | * (it doesn't have 8 streams). Accept the settings in this case anyway. |
| 447 | */ |
| 448 | if (!ap_min_req_set) |
| 449 | return true; |
| 450 | |
| 451 | /* Need to go over for 80MHz, 160MHz and for 80+80 */ |
| 452 | for (i = 0; i < 3; i++) { |
| 453 | const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = |
| 454 | &sta_he_cap->he_mcs_nss_supp; |
| 455 | u16 sta_mcs_map_rx = |
| 456 | le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); |
| 457 | u16 sta_mcs_map_tx = |
| 458 | le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); |
| 459 | u8 nss; |
| 460 | bool verified = true; |
| 461 | |
| 462 | /* |
| 463 | * For each band there is a maximum of 8 spatial streams |
| 464 | * possible. Each of the sta_mcs_map_* is a 16-bit struct built |
| 465 | * of 2 bits per NSS (1-8), with the values defined in enum |
| 466 | * ieee80211_he_mcs_support. Need to make sure STA TX and RX |
| 467 | * capabilities aren't less than the AP's minimum requirements |
| 468 | * for this HE BSS per SS. |
| 469 | * It is enough to find one such band that meets the reqs. |
| 470 | */ |
| 471 | for (nss = 8; nss > 0; nss--) { |
| 472 | u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; |
| 473 | u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; |
| 474 | u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; |
| 475 | |
| 476 | if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) |
| 477 | continue; |
| 478 | |
| 479 | /* |
| 480 | * Make sure the HE AP doesn't require MCSs that aren't |
| 481 | * supported by the client as required by spec |
| 482 | * |
| 483 | * P802.11-REVme/D0.3 |
| 484 | * 26.17.1 Basic HE BSS operation |
| 485 | * |
| 486 | * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) |
| 487 | * a BSS, unless it supports (i.e., is able to both transmit and |
| 488 | * receive using) all of the <HE-MCS, NSS> tuples in the basic |
| 489 | * HE-MCS and NSS set. |
| 490 | */ |
| 491 | if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || |
| 492 | sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || |
| 493 | (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { |
| 494 | verified = false; |
| 495 | break; |
| 496 | } |
| 497 | } |
| 498 | |
| 499 | if (verified) |
| 500 | return true; |
| 501 | } |
| 502 | |
| 503 | /* If here, STA doesn't meet AP's HE min requirements */ |
| 504 | return false; |
| 505 | } |
| 506 | |
| 507 | static u8 |
| 508 | ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, |
| 509 | const struct ieee80211_sta_eht_cap *sta_eht_cap, |
| 510 | unsigned int idx, int bw) |
| 511 | { |
| 512 | u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; |
| 513 | u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; |
| 514 | |
| 515 | /* handle us being a 20 MHz-only EHT STA - with four values |
| 516 | * for MCS 0-7, 8-9, 10-11, 12-13. |
| 517 | */ |
| 518 | if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) |
| 519 | return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; |
| 520 | |
| 521 | /* the others have MCS 0-9 together, rather than separately from 0-7 */ |
| 522 | if (idx > 0) |
| 523 | idx--; |
| 524 | |
| 525 | switch (bw) { |
| 526 | case 0: |
| 527 | return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; |
| 528 | case 1: |
| 529 | if (!(he_phy_cap0 & |
| 530 | (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | |
| 531 | IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) |
| 532 | return 0xff; /* pass check */ |
| 533 | return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; |
| 534 | case 2: |
| 535 | if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) |
| 536 | return 0xff; /* pass check */ |
| 537 | return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; |
| 538 | } |
| 539 | |
| 540 | WARN_ON(1); |
| 541 | return 0; |
| 542 | } |
| 543 | |
| 544 | static bool |
| 545 | ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, |
| 546 | struct ieee80211_supported_band *sband, |
| 547 | const struct ieee80211_eht_operation *eht_op) |
| 548 | { |
| 549 | const struct ieee80211_sta_he_cap *sta_he_cap = |
| 550 | ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); |
| 551 | const struct ieee80211_sta_eht_cap *sta_eht_cap = |
| 552 | ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); |
| 553 | const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; |
| 554 | unsigned int i; |
| 555 | |
| 556 | if (!sta_he_cap || !sta_eht_cap || !eht_op) |
| 557 | return false; |
| 558 | |
| 559 | req = &eht_op->basic_mcs_nss; |
| 560 | |
| 561 | for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { |
| 562 | u8 req_rx_nss, req_tx_nss; |
| 563 | unsigned int bw; |
| 564 | |
| 565 | req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], |
| 566 | IEEE80211_EHT_MCS_NSS_RX); |
| 567 | req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], |
| 568 | IEEE80211_EHT_MCS_NSS_TX); |
| 569 | |
| 570 | for (bw = 0; bw < 3; bw++) { |
| 571 | u8 have, have_rx_nss, have_tx_nss; |
| 572 | |
| 573 | have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, |
| 574 | sta_eht_cap, |
| 575 | i, bw); |
| 576 | have_rx_nss = u8_get_bits(have, |
| 577 | IEEE80211_EHT_MCS_NSS_RX); |
| 578 | have_tx_nss = u8_get_bits(have, |
| 579 | IEEE80211_EHT_MCS_NSS_TX); |
| 580 | |
| 581 | if (req_rx_nss > have_rx_nss || |
| 582 | req_tx_nss > have_tx_nss) |
| 583 | return false; |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | return true; |
| 588 | } |
| 589 | |
| 590 | static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, |
| 591 | const struct cfg80211_chan_def *chandef, |
| 592 | u32 prohibited_flags) |
| 593 | { |
| 594 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, |
| 595 | chandef, prohibited_flags)) |
| 596 | return false; |
| 597 | |
| 598 | if (chandef->punctured && |
| 599 | ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) |
| 600 | return false; |
| 601 | |
| 602 | if (chandef->punctured && chandef->chan->band == NL80211_BAND_5GHZ && |
| 603 | ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING_5GHZ)) |
| 604 | return false; |
| 605 | |
| 606 | return true; |
| 607 | } |
| 608 | |
| 609 | static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) |
| 610 | { |
| 611 | if (c->width == NL80211_CHAN_WIDTH_80P80) |
| 612 | return 4 + 4; |
| 613 | |
| 614 | return nl80211_chan_width_to_mhz(c->width) / 20; |
| 615 | } |
| 616 | |
| 617 | static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) |
| 618 | { |
| 619 | switch (c->width) { |
| 620 | case NL80211_CHAN_WIDTH_20: |
| 621 | case NL80211_CHAN_WIDTH_20_NOHT: |
| 622 | return 1; |
| 623 | case NL80211_CHAN_WIDTH_40: |
| 624 | return 2; |
| 625 | case NL80211_CHAN_WIDTH_80P80: |
| 626 | case NL80211_CHAN_WIDTH_80: |
| 627 | return 3; |
| 628 | case NL80211_CHAN_WIDTH_160: |
| 629 | return 4; |
| 630 | case NL80211_CHAN_WIDTH_320: |
| 631 | return 5; |
| 632 | default: |
| 633 | WARN_ON(1); |
| 634 | return 0; |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | VISIBLE_IF_MAC80211_KUNIT int |
| 639 | ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, |
| 640 | u8 n_partial_subchans) |
| 641 | { |
| 642 | int n = ieee80211_chandef_num_subchans(ap); |
| 643 | struct cfg80211_chan_def tmp = *ap; |
| 644 | int offset = 0; |
| 645 | |
| 646 | /* |
| 647 | * Given a chandef (in this context, it's the AP's) and a number |
| 648 | * of subchannels that we want to look at ('n_partial_subchans'), |
| 649 | * calculate the offset in number of subchannels between the full |
| 650 | * and the subset with the desired width. |
| 651 | */ |
| 652 | |
| 653 | /* same number of subchannels means no offset, obviously */ |
| 654 | if (n == n_partial_subchans) |
| 655 | return 0; |
| 656 | |
| 657 | /* don't WARN - misconfigured APs could cause this if their N > width */ |
| 658 | if (n < n_partial_subchans) |
| 659 | return 0; |
| 660 | |
| 661 | while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { |
| 662 | u32 prev = tmp.center_freq1; |
| 663 | |
| 664 | ieee80211_chandef_downgrade(&tmp, NULL); |
| 665 | |
| 666 | /* |
| 667 | * if center_freq moved up, half the original channels |
| 668 | * are gone now but were below, so increase offset |
| 669 | */ |
| 670 | if (prev < tmp.center_freq1) |
| 671 | offset += ieee80211_chandef_num_subchans(&tmp); |
| 672 | } |
| 673 | |
| 674 | /* |
| 675 | * 80+80 with secondary 80 below primary - four subchannels for it |
| 676 | * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') |
| 677 | */ |
| 678 | if (ap->width == NL80211_CHAN_WIDTH_80P80 && |
| 679 | ap->center_freq2 < ap->center_freq1) |
| 680 | offset += 4; |
| 681 | |
| 682 | return offset; |
| 683 | } |
| 684 | EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); |
| 685 | |
| 686 | VISIBLE_IF_MAC80211_KUNIT void |
| 687 | ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, |
| 688 | const struct cfg80211_chan_def *ap, |
| 689 | const struct cfg80211_chan_def *used) |
| 690 | { |
| 691 | u8 needed = ieee80211_chandef_num_subchans(used); |
| 692 | u8 have = ieee80211_chandef_num_subchans(ap); |
| 693 | u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; |
| 694 | u8 offset; |
| 695 | |
| 696 | if (!psd->valid) |
| 697 | return; |
| 698 | |
| 699 | /* if N is zero, all defaults were used, no point in rearranging */ |
| 700 | if (!psd->n) |
| 701 | goto out; |
| 702 | |
| 703 | BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); |
| 704 | |
| 705 | /* |
| 706 | * This assumes that 'N' is consistent with the HE channel, as |
| 707 | * it should be (otherwise the AP is broken). |
| 708 | * |
| 709 | * In psd->power we have values in the order 0..N, 0..K, where |
| 710 | * N+K should cover the entire channel per 'ap', but even if it |
| 711 | * doesn't then we've pre-filled 'unlimited' as defaults. |
| 712 | * |
| 713 | * But this is all the wrong order, we want to have them in the |
| 714 | * order of the 'used' channel. |
| 715 | * |
| 716 | * So for example, we could have a 320 MHz EHT AP, which has the |
| 717 | * HE channel as 80 MHz (e.g. due to puncturing, which doesn't |
| 718 | * seem to be considered for the TPE), as follows: |
| 719 | * |
| 720 | * EHT 320: | | | | | | | | | | | | | | | | | |
| 721 | * HE 80: | | | | | |
| 722 | * used 160: | | | | | | | | | |
| 723 | * |
| 724 | * N entries: |--|--|--|--| |
| 725 | * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| |
| 726 | * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 |
| 727 | * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
| 728 | * used chan: 0 1 2 3 4 5 6 7 |
| 729 | * |
| 730 | * The idx in the power array ('power idx') is like this since it |
| 731 | * comes directly from the element's N and K entries in their |
| 732 | * element order, and those are this way for HE compatibility. |
| 733 | * |
| 734 | * Rearrange them as desired here, first by putting them into the |
| 735 | * 'full chan' order, and then selecting the necessary subset for |
| 736 | * the 'used chan'. |
| 737 | */ |
| 738 | |
| 739 | /* first reorder according to AP channel */ |
| 740 | offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); |
| 741 | for (int i = 0; i < have; i++) { |
| 742 | if (i < offset) |
| 743 | tmp[i] = psd->power[i + psd->n]; |
| 744 | else if (i < offset + psd->n) |
| 745 | tmp[i] = psd->power[i - offset]; |
| 746 | else |
| 747 | tmp[i] = psd->power[i]; |
| 748 | } |
| 749 | |
| 750 | /* |
| 751 | * and then select the subset for the used channel |
| 752 | * (set everything to defaults first in case a driver is confused) |
| 753 | */ |
| 754 | memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); |
| 755 | offset = ieee80211_calc_chandef_subchan_offset(ap, needed); |
| 756 | for (int i = 0; i < needed; i++) |
| 757 | psd->power[i] = tmp[offset + i]; |
| 758 | |
| 759 | out: |
| 760 | /* limit, but don't lie if there are defaults in the data */ |
| 761 | if (needed < psd->count) |
| 762 | psd->count = needed; |
| 763 | } |
| 764 | EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); |
| 765 | |
| 766 | static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, |
| 767 | const struct cfg80211_chan_def *ap, |
| 768 | const struct cfg80211_chan_def *used) |
| 769 | { |
| 770 | /* ignore this completely for narrow/invalid channels */ |
| 771 | if (!ieee80211_chandef_num_subchans(ap) || |
| 772 | !ieee80211_chandef_num_subchans(used)) { |
| 773 | ieee80211_clear_tpe(tpe); |
| 774 | return; |
| 775 | } |
| 776 | |
| 777 | for (int i = 0; i < 2; i++) { |
| 778 | int needed_pwr_count; |
| 779 | |
| 780 | ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); |
| 781 | ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); |
| 782 | |
| 783 | /* limit this to the widths we actually need */ |
| 784 | needed_pwr_count = ieee80211_chandef_num_widths(used); |
| 785 | if (needed_pwr_count < tpe->max_local[i].count) |
| 786 | tpe->max_local[i].count = needed_pwr_count; |
| 787 | if (needed_pwr_count < tpe->max_reg_client[i].count) |
| 788 | tpe->max_reg_client[i].count = needed_pwr_count; |
| 789 | } |
| 790 | } |
| 791 | |
| 792 | /* |
| 793 | * The AP part of the channel request is used to distinguish settings |
| 794 | * to the device used for wider bandwidth OFDMA. This is used in the |
| 795 | * channel context code to assign two channel contexts even if they're |
| 796 | * both for the same channel, if the AP bandwidths are incompatible. |
| 797 | * If not EHT (or driver override) then ap.chan == NULL indicates that |
| 798 | * there's no wider BW OFDMA used. |
| 799 | */ |
| 800 | static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, |
| 801 | struct ieee80211_chan_req *chanreq, |
| 802 | struct ieee80211_conn_settings *conn, |
| 803 | struct cfg80211_chan_def *ap_chandef) |
| 804 | { |
| 805 | chanreq->ap.chan = NULL; |
| 806 | |
| 807 | if (conn->mode < IEEE80211_CONN_MODE_EHT) |
| 808 | return; |
| 809 | if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) |
| 810 | return; |
| 811 | |
| 812 | chanreq->ap = *ap_chandef; |
| 813 | } |
| 814 | |
| 815 | static struct ieee802_11_elems * |
| 816 | ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, |
| 817 | struct ieee80211_conn_settings *conn, |
| 818 | struct cfg80211_bss *cbss, int link_id, |
| 819 | struct ieee80211_chan_req *chanreq, |
| 820 | struct cfg80211_chan_def *ap_chandef) |
| 821 | { |
| 822 | const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); |
| 823 | struct ieee80211_bss *bss = (void *)cbss->priv; |
| 824 | struct ieee80211_channel *channel = cbss->channel; |
| 825 | struct ieee80211_elems_parse_params parse_params = { |
| 826 | .link_id = -1, |
| 827 | .from_ap = true, |
| 828 | .start = ies->data, |
| 829 | .len = ies->len, |
| 830 | }; |
| 831 | struct ieee802_11_elems *elems; |
| 832 | struct ieee80211_supported_band *sband; |
| 833 | enum ieee80211_conn_mode ap_mode; |
| 834 | int ret; |
| 835 | |
| 836 | again: |
| 837 | parse_params.mode = conn->mode; |
| 838 | elems = ieee802_11_parse_elems_full(&parse_params); |
| 839 | if (!elems) |
| 840 | return ERR_PTR(-ENOMEM); |
| 841 | |
| 842 | ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, |
| 843 | elems, false, conn, ap_chandef); |
| 844 | |
| 845 | /* this should be impossible since parsing depends on our mode */ |
| 846 | if (WARN_ON(ap_mode > conn->mode)) { |
| 847 | ret = -EINVAL; |
| 848 | goto free; |
| 849 | } |
| 850 | |
| 851 | if (conn->mode != ap_mode) { |
| 852 | conn->mode = ap_mode; |
| 853 | kfree(elems); |
| 854 | goto again; |
| 855 | } |
| 856 | |
| 857 | mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", |
| 858 | cbss->bssid, ieee80211_conn_mode_str(ap_mode)); |
| 859 | |
| 860 | sband = sdata->local->hw.wiphy->bands[channel->band]; |
| 861 | |
| 862 | switch (channel->band) { |
| 863 | case NL80211_BAND_S1GHZ: |
| 864 | if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { |
| 865 | ret = -EINVAL; |
| 866 | goto free; |
| 867 | } |
| 868 | return elems; |
| 869 | case NL80211_BAND_6GHZ: |
| 870 | if (ap_mode < IEEE80211_CONN_MODE_HE) { |
| 871 | sdata_info(sdata, |
| 872 | "Rejecting non-HE 6/7 GHz connection"); |
| 873 | ret = -EINVAL; |
| 874 | goto free; |
| 875 | } |
| 876 | break; |
| 877 | default: |
| 878 | if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { |
| 879 | ret = -EINVAL; |
| 880 | goto free; |
| 881 | } |
| 882 | } |
| 883 | |
| 884 | switch (ap_mode) { |
| 885 | case IEEE80211_CONN_MODE_S1G: |
| 886 | WARN_ON(1); |
| 887 | ret = -EINVAL; |
| 888 | goto free; |
| 889 | case IEEE80211_CONN_MODE_LEGACY: |
| 890 | conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; |
| 891 | break; |
| 892 | case IEEE80211_CONN_MODE_HT: |
| 893 | conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, |
| 894 | conn->bw_limit, |
| 895 | IEEE80211_CONN_BW_LIMIT_40); |
| 896 | break; |
| 897 | case IEEE80211_CONN_MODE_VHT: |
| 898 | case IEEE80211_CONN_MODE_HE: |
| 899 | conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, |
| 900 | conn->bw_limit, |
| 901 | IEEE80211_CONN_BW_LIMIT_160); |
| 902 | break; |
| 903 | case IEEE80211_CONN_MODE_EHT: |
| 904 | conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, |
| 905 | conn->bw_limit, |
| 906 | IEEE80211_CONN_BW_LIMIT_320); |
| 907 | break; |
| 908 | } |
| 909 | |
| 910 | chanreq->oper = *ap_chandef; |
| 911 | |
| 912 | ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); |
| 913 | |
| 914 | while (!ieee80211_chandef_usable(sdata, &chanreq->oper, |
| 915 | IEEE80211_CHAN_DISABLED)) { |
| 916 | if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { |
| 917 | ret = -EINVAL; |
| 918 | goto free; |
| 919 | } |
| 920 | |
| 921 | ieee80211_chanreq_downgrade(chanreq, conn); |
| 922 | } |
| 923 | |
| 924 | if (conn->mode >= IEEE80211_CONN_MODE_HE && |
| 925 | !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, |
| 926 | IEEE80211_CHAN_NO_HE)) { |
| 927 | conn->mode = IEEE80211_CONN_MODE_VHT; |
| 928 | conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, |
| 929 | conn->bw_limit, |
| 930 | IEEE80211_CONN_BW_LIMIT_160); |
| 931 | } |
| 932 | |
| 933 | if (conn->mode >= IEEE80211_CONN_MODE_EHT && |
| 934 | !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, |
| 935 | IEEE80211_CHAN_NO_EHT)) { |
| 936 | conn->mode = IEEE80211_CONN_MODE_HE; |
| 937 | conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, |
| 938 | conn->bw_limit, |
| 939 | IEEE80211_CONN_BW_LIMIT_160); |
| 940 | } |
| 941 | |
| 942 | if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) |
| 943 | sdata_info(sdata, |
| 944 | "regulatory prevented using AP config, downgraded\n"); |
| 945 | |
| 946 | if (conn->mode >= IEEE80211_CONN_MODE_HE && |
| 947 | (!ieee80211_verify_peer_he_mcs_support(sdata, (void *)elems->he_cap, |
| 948 | elems->he_operation) || |
| 949 | !ieee80211_verify_sta_he_mcs_support(sdata, sband, |
| 950 | elems->he_operation))) { |
| 951 | conn->mode = IEEE80211_CONN_MODE_VHT; |
| 952 | sdata_info(sdata, "required MCSes not supported, disabling HE\n"); |
| 953 | } |
| 954 | |
| 955 | if (conn->mode >= IEEE80211_CONN_MODE_EHT && |
| 956 | !ieee80211_verify_sta_eht_mcs_support(sdata, sband, |
| 957 | elems->eht_operation)) { |
| 958 | conn->mode = IEEE80211_CONN_MODE_HE; |
| 959 | conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, |
| 960 | conn->bw_limit, |
| 961 | IEEE80211_CONN_BW_LIMIT_160); |
| 962 | sdata_info(sdata, "required MCSes not supported, disabling EHT\n"); |
| 963 | } |
| 964 | |
| 965 | /* the mode can only decrease, so this must terminate */ |
| 966 | if (ap_mode != conn->mode) { |
| 967 | kfree(elems); |
| 968 | goto again; |
| 969 | } |
| 970 | |
| 971 | mlme_link_id_dbg(sdata, link_id, |
| 972 | "connecting with %s mode, max bandwidth %d MHz\n", |
| 973 | ieee80211_conn_mode_str(conn->mode), |
| 974 | 20 * (1 << conn->bw_limit)); |
| 975 | |
| 976 | if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { |
| 977 | ret = -EINVAL; |
| 978 | goto free; |
| 979 | } |
| 980 | |
| 981 | return elems; |
| 982 | free: |
| 983 | kfree(elems); |
| 984 | return ERR_PTR(ret); |
| 985 | } |
| 986 | |
| 987 | static int ieee80211_config_bw(struct ieee80211_link_data *link, |
| 988 | struct ieee802_11_elems *elems, |
| 989 | bool update, u64 *changed) |
| 990 | { |
| 991 | struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; |
| 992 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 993 | struct ieee80211_chan_req chanreq = {}; |
| 994 | struct cfg80211_chan_def ap_chandef; |
| 995 | enum ieee80211_conn_mode ap_mode; |
| 996 | u32 vht_cap_info = 0; |
| 997 | u16 ht_opmode; |
| 998 | int ret; |
| 999 | |
| 1000 | /* don't track any bandwidth changes in legacy/S1G modes */ |
| 1001 | if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || |
| 1002 | link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) |
| 1003 | return 0; |
| 1004 | |
| 1005 | if (elems->vht_cap_elem) |
| 1006 | vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); |
| 1007 | |
| 1008 | ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, |
| 1009 | elems, true, &link->u.mgd.conn, |
| 1010 | &ap_chandef); |
| 1011 | |
| 1012 | if (ap_mode != link->u.mgd.conn.mode) { |
| 1013 | link_info(link, |
| 1014 | "AP appears to change mode (expected %s, found %s), disconnect\n", |
| 1015 | ieee80211_conn_mode_str(link->u.mgd.conn.mode), |
| 1016 | ieee80211_conn_mode_str(ap_mode)); |
| 1017 | return -EINVAL; |
| 1018 | } |
| 1019 | |
| 1020 | chanreq.oper = ap_chandef; |
| 1021 | ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, |
| 1022 | &ap_chandef); |
| 1023 | |
| 1024 | /* |
| 1025 | * if HT operation mode changed store the new one - |
| 1026 | * this may be applicable even if channel is identical |
| 1027 | */ |
| 1028 | if (elems->ht_operation) { |
| 1029 | ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); |
| 1030 | if (link->conf->ht_operation_mode != ht_opmode) { |
| 1031 | *changed |= BSS_CHANGED_HT; |
| 1032 | link->conf->ht_operation_mode = ht_opmode; |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | /* |
| 1037 | * Downgrade the new channel if we associated with restricted |
| 1038 | * bandwidth capabilities. For example, if we associated as a |
| 1039 | * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities |
| 1040 | * or config reasons) then switching to a 40 MHz channel now |
| 1041 | * won't do us any good -- we couldn't use it with the AP. |
| 1042 | */ |
| 1043 | while (link->u.mgd.conn.bw_limit < |
| 1044 | ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) |
| 1045 | ieee80211_chandef_downgrade(&chanreq.oper, NULL); |
| 1046 | |
| 1047 | if (ap_chandef.chan->band == NL80211_BAND_6GHZ && |
| 1048 | link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { |
| 1049 | ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, |
| 1050 | &chanreq.oper); |
| 1051 | if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { |
| 1052 | link->conf->tpe = elems->tpe; |
| 1053 | *changed |= BSS_CHANGED_TPE; |
| 1054 | } |
| 1055 | } |
| 1056 | |
| 1057 | if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) |
| 1058 | return 0; |
| 1059 | |
| 1060 | link_info(link, |
| 1061 | "AP %pM changed bandwidth, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", |
| 1062 | link->u.mgd.bssid, chanreq.oper.chan->center_freq, |
| 1063 | chanreq.oper.chan->freq_offset, chanreq.oper.width, |
| 1064 | chanreq.oper.center_freq1, chanreq.oper.freq1_offset, |
| 1065 | chanreq.oper.center_freq2); |
| 1066 | |
| 1067 | if (!cfg80211_chandef_valid(&chanreq.oper)) { |
| 1068 | sdata_info(sdata, |
| 1069 | "AP %pM changed caps/bw in a way we can't support - disconnect\n", |
| 1070 | link->u.mgd.bssid); |
| 1071 | return -EINVAL; |
| 1072 | } |
| 1073 | |
| 1074 | if (!update) { |
| 1075 | link->conf->chanreq = chanreq; |
| 1076 | return 0; |
| 1077 | } |
| 1078 | |
| 1079 | /* |
| 1080 | * We're tracking the current AP here, so don't do any further checks |
| 1081 | * here. This keeps us from playing ping-pong with regulatory, without |
| 1082 | * it the following can happen (for example): |
| 1083 | * - connect to an AP with 80 MHz, world regdom allows 80 MHz |
| 1084 | * - AP advertises regdom US |
| 1085 | * - CRDA loads regdom US with 80 MHz prohibited (old database) |
| 1086 | * - we detect an unsupported channel and disconnect |
| 1087 | * - disconnect causes CRDA to reload world regdomain and the game |
| 1088 | * starts anew. |
| 1089 | * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) |
| 1090 | * |
| 1091 | * It seems possible that there are still scenarios with CSA or real |
| 1092 | * bandwidth changes where a this could happen, but those cases are |
| 1093 | * less common and wouldn't completely prevent using the AP. |
| 1094 | */ |
| 1095 | |
| 1096 | ret = ieee80211_link_change_chanreq(link, &chanreq, changed); |
| 1097 | if (ret) { |
| 1098 | sdata_info(sdata, |
| 1099 | "AP %pM changed bandwidth to incompatible one - disconnect\n", |
| 1100 | link->u.mgd.bssid); |
| 1101 | return ret; |
| 1102 | } |
| 1103 | |
| 1104 | cfg80211_schedule_channels_check(&sdata->wdev); |
| 1105 | return 0; |
| 1106 | } |
| 1107 | |
| 1108 | /* frame sending functions */ |
| 1109 | |
| 1110 | static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, |
| 1111 | struct sk_buff *skb, u8 ap_ht_param, |
| 1112 | struct ieee80211_supported_band *sband, |
| 1113 | struct ieee80211_channel *channel, |
| 1114 | enum ieee80211_smps_mode smps, |
| 1115 | const struct ieee80211_conn_settings *conn) |
| 1116 | { |
| 1117 | u8 *pos; |
| 1118 | u32 flags = channel->flags; |
| 1119 | u16 cap; |
| 1120 | struct ieee80211_sta_ht_cap ht_cap; |
| 1121 | |
| 1122 | BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); |
| 1123 | |
| 1124 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); |
| 1125 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); |
| 1126 | |
| 1127 | /* determine capability flags */ |
| 1128 | cap = ht_cap.cap; |
| 1129 | |
| 1130 | switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
| 1131 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
| 1132 | if (flags & IEEE80211_CHAN_NO_HT40PLUS) { |
| 1133 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
| 1134 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
| 1135 | } |
| 1136 | break; |
| 1137 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
| 1138 | if (flags & IEEE80211_CHAN_NO_HT40MINUS) { |
| 1139 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
| 1140 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
| 1141 | } |
| 1142 | break; |
| 1143 | } |
| 1144 | |
| 1145 | /* |
| 1146 | * If 40 MHz was disabled associate as though we weren't |
| 1147 | * capable of 40 MHz -- some broken APs will never fall |
| 1148 | * back to trying to transmit in 20 MHz. |
| 1149 | */ |
| 1150 | if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { |
| 1151 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
| 1152 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
| 1153 | } |
| 1154 | |
| 1155 | /* set SM PS mode properly */ |
| 1156 | cap &= ~IEEE80211_HT_CAP_SM_PS; |
| 1157 | switch (smps) { |
| 1158 | case IEEE80211_SMPS_AUTOMATIC: |
| 1159 | case IEEE80211_SMPS_NUM_MODES: |
| 1160 | WARN_ON(1); |
| 1161 | fallthrough; |
| 1162 | case IEEE80211_SMPS_OFF: |
| 1163 | cap |= WLAN_HT_CAP_SM_PS_DISABLED << |
| 1164 | IEEE80211_HT_CAP_SM_PS_SHIFT; |
| 1165 | break; |
| 1166 | case IEEE80211_SMPS_STATIC: |
| 1167 | cap |= WLAN_HT_CAP_SM_PS_STATIC << |
| 1168 | IEEE80211_HT_CAP_SM_PS_SHIFT; |
| 1169 | break; |
| 1170 | case IEEE80211_SMPS_DYNAMIC: |
| 1171 | cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << |
| 1172 | IEEE80211_HT_CAP_SM_PS_SHIFT; |
| 1173 | break; |
| 1174 | } |
| 1175 | |
| 1176 | /* reserve and fill IE */ |
| 1177 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); |
| 1178 | ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); |
| 1179 | } |
| 1180 | |
| 1181 | /* This function determines vht capability flags for the association |
| 1182 | * and builds the IE. |
| 1183 | * Note - the function returns true to own the MU-MIMO capability |
| 1184 | */ |
| 1185 | static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, |
| 1186 | struct sk_buff *skb, |
| 1187 | struct ieee80211_supported_band *sband, |
| 1188 | struct ieee80211_vht_cap *ap_vht_cap, |
| 1189 | const struct ieee80211_conn_settings *conn) |
| 1190 | { |
| 1191 | struct ieee80211_local *local = sdata->local; |
| 1192 | u8 *pos; |
| 1193 | u32 cap; |
| 1194 | struct ieee80211_sta_vht_cap vht_cap; |
| 1195 | u32 mask, ap_bf_sts, our_bf_sts; |
| 1196 | bool mu_mimo_owner = false; |
| 1197 | |
| 1198 | BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); |
| 1199 | |
| 1200 | memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); |
| 1201 | ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); |
| 1202 | |
| 1203 | /* determine capability flags */ |
| 1204 | cap = vht_cap.cap; |
| 1205 | |
| 1206 | if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { |
| 1207 | cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; |
| 1208 | cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
| 1209 | } |
| 1210 | |
| 1211 | /* |
| 1212 | * Some APs apparently get confused if our capabilities are better |
| 1213 | * than theirs, so restrict what we advertise in the assoc request. |
| 1214 | */ |
| 1215 | if (!(ap_vht_cap->vht_cap_info & |
| 1216 | cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) |
| 1217 | cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | |
| 1218 | IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); |
| 1219 | else if (!(ap_vht_cap->vht_cap_info & |
| 1220 | cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) |
| 1221 | cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; |
| 1222 | |
| 1223 | /* |
| 1224 | * If some other vif is using the MU-MIMO capability we cannot associate |
| 1225 | * using MU-MIMO - this will lead to contradictions in the group-id |
| 1226 | * mechanism. |
| 1227 | * Ownership is defined since association request, in order to avoid |
| 1228 | * simultaneous associations with MU-MIMO. |
| 1229 | */ |
| 1230 | if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { |
| 1231 | bool disable_mu_mimo = false; |
| 1232 | struct ieee80211_sub_if_data *other; |
| 1233 | |
| 1234 | list_for_each_entry(other, &local->interfaces, list) { |
| 1235 | if (other->vif.bss_conf.mu_mimo_owner) { |
| 1236 | disable_mu_mimo = true; |
| 1237 | break; |
| 1238 | } |
| 1239 | } |
| 1240 | if (disable_mu_mimo) |
| 1241 | cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; |
| 1242 | else |
| 1243 | mu_mimo_owner = true; |
| 1244 | } |
| 1245 | |
| 1246 | mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; |
| 1247 | |
| 1248 | ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; |
| 1249 | our_bf_sts = cap & mask; |
| 1250 | |
| 1251 | if (ap_bf_sts < our_bf_sts) { |
| 1252 | cap &= ~mask; |
| 1253 | cap |= ap_bf_sts; |
| 1254 | } |
| 1255 | |
| 1256 | /* reserve and fill IE */ |
| 1257 | pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); |
| 1258 | ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); |
| 1259 | |
| 1260 | return mu_mimo_owner; |
| 1261 | } |
| 1262 | |
| 1263 | static void ieee80211_assoc_add_rates(struct sk_buff *skb, |
| 1264 | enum nl80211_chan_width width, |
| 1265 | struct ieee80211_supported_band *sband, |
| 1266 | struct ieee80211_mgd_assoc_data *assoc_data) |
| 1267 | { |
| 1268 | u32 rates; |
| 1269 | |
| 1270 | if (assoc_data->supp_rates_len) { |
| 1271 | /* |
| 1272 | * Get all rates supported by the device and the AP as |
| 1273 | * some APs don't like getting a superset of their rates |
| 1274 | * in the association request (e.g. D-Link DAP 1353 in |
| 1275 | * b-only mode)... |
| 1276 | */ |
| 1277 | ieee80211_parse_bitrates(width, sband, |
| 1278 | assoc_data->supp_rates, |
| 1279 | assoc_data->supp_rates_len, |
| 1280 | &rates); |
| 1281 | } else { |
| 1282 | /* |
| 1283 | * In case AP not provide any supported rates information |
| 1284 | * before association, we send information element(s) with |
| 1285 | * all rates that we support. |
| 1286 | */ |
| 1287 | rates = ~0; |
| 1288 | } |
| 1289 | |
| 1290 | ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, |
| 1291 | WLAN_EID_SUPP_RATES); |
| 1292 | ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, |
| 1293 | WLAN_EID_EXT_SUPP_RATES); |
| 1294 | } |
| 1295 | |
| 1296 | static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, |
| 1297 | const u8 *elems, |
| 1298 | size_t elems_len, |
| 1299 | size_t offset) |
| 1300 | { |
| 1301 | size_t noffset; |
| 1302 | |
| 1303 | static const u8 before_ht[] = { |
| 1304 | WLAN_EID_SSID, |
| 1305 | WLAN_EID_SUPP_RATES, |
| 1306 | WLAN_EID_EXT_SUPP_RATES, |
| 1307 | WLAN_EID_PWR_CAPABILITY, |
| 1308 | WLAN_EID_SUPPORTED_CHANNELS, |
| 1309 | WLAN_EID_RSN, |
| 1310 | WLAN_EID_QOS_CAPA, |
| 1311 | WLAN_EID_RRM_ENABLED_CAPABILITIES, |
| 1312 | WLAN_EID_MOBILITY_DOMAIN, |
| 1313 | WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ |
| 1314 | WLAN_EID_RIC_DATA, /* reassoc only */ |
| 1315 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, |
| 1316 | }; |
| 1317 | static const u8 after_ric[] = { |
| 1318 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, |
| 1319 | WLAN_EID_HT_CAPABILITY, |
| 1320 | WLAN_EID_BSS_COEX_2040, |
| 1321 | /* luckily this is almost always there */ |
| 1322 | WLAN_EID_EXT_CAPABILITY, |
| 1323 | WLAN_EID_QOS_TRAFFIC_CAPA, |
| 1324 | WLAN_EID_TIM_BCAST_REQ, |
| 1325 | WLAN_EID_INTERWORKING, |
| 1326 | /* 60 GHz (Multi-band, DMG, MMS) can't happen */ |
| 1327 | WLAN_EID_VHT_CAPABILITY, |
| 1328 | WLAN_EID_OPMODE_NOTIF, |
| 1329 | }; |
| 1330 | |
| 1331 | if (!elems_len) |
| 1332 | return offset; |
| 1333 | |
| 1334 | noffset = ieee80211_ie_split_ric(elems, elems_len, |
| 1335 | before_ht, |
| 1336 | ARRAY_SIZE(before_ht), |
| 1337 | after_ric, |
| 1338 | ARRAY_SIZE(after_ric), |
| 1339 | offset); |
| 1340 | skb_put_data(skb, elems + offset, noffset - offset); |
| 1341 | |
| 1342 | return noffset; |
| 1343 | } |
| 1344 | |
| 1345 | static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, |
| 1346 | const u8 *elems, |
| 1347 | size_t elems_len, |
| 1348 | size_t offset) |
| 1349 | { |
| 1350 | static const u8 before_vht[] = { |
| 1351 | /* |
| 1352 | * no need to list the ones split off before HT |
| 1353 | * or generated here |
| 1354 | */ |
| 1355 | WLAN_EID_BSS_COEX_2040, |
| 1356 | WLAN_EID_EXT_CAPABILITY, |
| 1357 | WLAN_EID_QOS_TRAFFIC_CAPA, |
| 1358 | WLAN_EID_TIM_BCAST_REQ, |
| 1359 | WLAN_EID_INTERWORKING, |
| 1360 | /* 60 GHz (Multi-band, DMG, MMS) can't happen */ |
| 1361 | }; |
| 1362 | size_t noffset; |
| 1363 | |
| 1364 | if (!elems_len) |
| 1365 | return offset; |
| 1366 | |
| 1367 | /* RIC already taken care of in ieee80211_add_before_ht_elems() */ |
| 1368 | noffset = ieee80211_ie_split(elems, elems_len, |
| 1369 | before_vht, ARRAY_SIZE(before_vht), |
| 1370 | offset); |
| 1371 | skb_put_data(skb, elems + offset, noffset - offset); |
| 1372 | |
| 1373 | return noffset; |
| 1374 | } |
| 1375 | |
| 1376 | static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, |
| 1377 | const u8 *elems, |
| 1378 | size_t elems_len, |
| 1379 | size_t offset) |
| 1380 | { |
| 1381 | static const u8 before_he[] = { |
| 1382 | /* |
| 1383 | * no need to list the ones split off before VHT |
| 1384 | * or generated here |
| 1385 | */ |
| 1386 | WLAN_EID_OPMODE_NOTIF, |
| 1387 | WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, |
| 1388 | /* 11ai elements */ |
| 1389 | WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, |
| 1390 | WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, |
| 1391 | WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, |
| 1392 | WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, |
| 1393 | WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, |
| 1394 | /* TODO: add 11ah/11aj/11ak elements */ |
| 1395 | }; |
| 1396 | size_t noffset; |
| 1397 | |
| 1398 | if (!elems_len) |
| 1399 | return offset; |
| 1400 | |
| 1401 | /* RIC already taken care of in ieee80211_add_before_ht_elems() */ |
| 1402 | noffset = ieee80211_ie_split(elems, elems_len, |
| 1403 | before_he, ARRAY_SIZE(before_he), |
| 1404 | offset); |
| 1405 | skb_put_data(skb, elems + offset, noffset - offset); |
| 1406 | |
| 1407 | return noffset; |
| 1408 | } |
| 1409 | |
| 1410 | #define PRESENT_ELEMS_MAX 8 |
| 1411 | #define PRESENT_ELEM_EXT_OFFS 0x100 |
| 1412 | |
| 1413 | static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, |
| 1414 | struct sk_buff *skb, u16 capab, |
| 1415 | const struct element *ext_capa, |
| 1416 | const u16 *present_elems); |
| 1417 | |
| 1418 | static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, |
| 1419 | struct sk_buff *skb, u16 *capab, |
| 1420 | const struct element *ext_capa, |
| 1421 | const u8 *extra_elems, |
| 1422 | size_t extra_elems_len, |
| 1423 | unsigned int link_id, |
| 1424 | struct ieee80211_link_data *link, |
| 1425 | u16 *present_elems) |
| 1426 | { |
| 1427 | enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); |
| 1428 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 1429 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; |
| 1430 | struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; |
| 1431 | struct ieee80211_channel *chan = cbss->channel; |
| 1432 | const struct ieee80211_sband_iftype_data *iftd; |
| 1433 | struct ieee80211_local *local = sdata->local; |
| 1434 | struct ieee80211_supported_band *sband; |
| 1435 | enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; |
| 1436 | struct ieee80211_chanctx_conf *chanctx_conf; |
| 1437 | enum ieee80211_smps_mode smps_mode; |
| 1438 | u16 orig_capab = *capab; |
| 1439 | size_t offset = 0; |
| 1440 | int present_elems_len = 0; |
| 1441 | u8 *pos; |
| 1442 | int i; |
| 1443 | |
| 1444 | #define ADD_PRESENT_ELEM(id) do { \ |
| 1445 | /* need a last for termination - we use 0 == SSID */ \ |
| 1446 | if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ |
| 1447 | present_elems[present_elems_len++] = (id); \ |
| 1448 | } while (0) |
| 1449 | #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) |
| 1450 | |
| 1451 | if (link) |
| 1452 | smps_mode = link->smps_mode; |
| 1453 | else if (sdata->u.mgd.powersave) |
| 1454 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
| 1455 | else |
| 1456 | smps_mode = IEEE80211_SMPS_OFF; |
| 1457 | |
| 1458 | if (link) { |
| 1459 | /* |
| 1460 | * 5/10 MHz scenarios are only viable without MLO, in which |
| 1461 | * case this pointer should be used ... All of this is a bit |
| 1462 | * unclear though, not sure this even works at all. |
| 1463 | */ |
| 1464 | rcu_read_lock(); |
| 1465 | chanctx_conf = rcu_dereference(link->conf->chanctx_conf); |
| 1466 | if (chanctx_conf) |
| 1467 | width = chanctx_conf->def.width; |
| 1468 | rcu_read_unlock(); |
| 1469 | } |
| 1470 | |
| 1471 | sband = local->hw.wiphy->bands[chan->band]; |
| 1472 | iftd = ieee80211_get_sband_iftype_data(sband, iftype); |
| 1473 | |
| 1474 | if (sband->band == NL80211_BAND_2GHZ) { |
| 1475 | *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; |
| 1476 | *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; |
| 1477 | } |
| 1478 | |
| 1479 | if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
| 1480 | ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) |
| 1481 | *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; |
| 1482 | |
| 1483 | if (sband->band != NL80211_BAND_S1GHZ) |
| 1484 | ieee80211_assoc_add_rates(skb, width, sband, assoc_data); |
| 1485 | |
| 1486 | if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || |
| 1487 | *capab & WLAN_CAPABILITY_RADIO_MEASURE) { |
| 1488 | struct cfg80211_chan_def chandef = { |
| 1489 | .width = width, |
| 1490 | .chan = chan, |
| 1491 | }; |
| 1492 | |
| 1493 | pos = skb_put(skb, 4); |
| 1494 | *pos++ = WLAN_EID_PWR_CAPABILITY; |
| 1495 | *pos++ = 2; |
| 1496 | *pos++ = 0; /* min tx power */ |
| 1497 | /* max tx power */ |
| 1498 | *pos++ = ieee80211_chandef_max_power(&chandef); |
| 1499 | ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); |
| 1500 | } |
| 1501 | |
| 1502 | /* |
| 1503 | * Per spec, we shouldn't include the list of channels if we advertise |
| 1504 | * support for extended channel switching, but we've always done that; |
| 1505 | * (for now?) apply this restriction only on the (new) 6 GHz band. |
| 1506 | */ |
| 1507 | if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && |
| 1508 | (sband->band != NL80211_BAND_6GHZ || |
| 1509 | !ext_capa || ext_capa->datalen < 1 || |
| 1510 | !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { |
| 1511 | /* TODO: get this in reg domain format */ |
| 1512 | pos = skb_put(skb, 2 * sband->n_channels + 2); |
| 1513 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; |
| 1514 | *pos++ = 2 * sband->n_channels; |
| 1515 | for (i = 0; i < sband->n_channels; i++) { |
| 1516 | int cf = sband->channels[i].center_freq; |
| 1517 | |
| 1518 | *pos++ = ieee80211_frequency_to_channel(cf); |
| 1519 | *pos++ = 1; /* one channel in the subband*/ |
| 1520 | } |
| 1521 | ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); |
| 1522 | } |
| 1523 | |
| 1524 | /* if present, add any custom IEs that go before HT */ |
| 1525 | offset = ieee80211_add_before_ht_elems(skb, extra_elems, |
| 1526 | extra_elems_len, |
| 1527 | offset); |
| 1528 | |
| 1529 | if (sband->band != NL80211_BAND_6GHZ && |
| 1530 | assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { |
| 1531 | ieee80211_add_ht_ie(sdata, skb, |
| 1532 | assoc_data->link[link_id].ap_ht_param, |
| 1533 | sband, chan, smps_mode, |
| 1534 | &assoc_data->link[link_id].conn); |
| 1535 | ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); |
| 1536 | } |
| 1537 | |
| 1538 | /* if present, add any custom IEs that go before VHT */ |
| 1539 | offset = ieee80211_add_before_vht_elems(skb, extra_elems, |
| 1540 | extra_elems_len, |
| 1541 | offset); |
| 1542 | |
| 1543 | if (sband->band != NL80211_BAND_6GHZ && |
| 1544 | assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && |
| 1545 | sband->vht_cap.vht_supported) { |
| 1546 | bool mu_mimo_owner = |
| 1547 | ieee80211_add_vht_ie(sdata, skb, sband, |
| 1548 | &assoc_data->link[link_id].ap_vht_cap, |
| 1549 | &assoc_data->link[link_id].conn); |
| 1550 | |
| 1551 | if (link) |
| 1552 | link->conf->mu_mimo_owner = mu_mimo_owner; |
| 1553 | ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); |
| 1554 | } |
| 1555 | |
| 1556 | /* if present, add any custom IEs that go before HE */ |
| 1557 | offset = ieee80211_add_before_he_elems(skb, extra_elems, |
| 1558 | extra_elems_len, |
| 1559 | offset); |
| 1560 | |
| 1561 | if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { |
| 1562 | ieee80211_put_he_cap(skb, sdata, sband, |
| 1563 | &assoc_data->link[link_id].conn); |
| 1564 | ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); |
| 1565 | ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); |
| 1566 | } |
| 1567 | |
| 1568 | /* |
| 1569 | * careful - need to know about all the present elems before |
| 1570 | * calling ieee80211_assoc_add_ml_elem(), so add this one if |
| 1571 | * we're going to put it after the ML element |
| 1572 | */ |
| 1573 | if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) |
| 1574 | ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); |
| 1575 | |
| 1576 | if (link_id == assoc_data->assoc_link_id) |
| 1577 | ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, |
| 1578 | present_elems); |
| 1579 | |
| 1580 | /* crash if somebody gets it wrong */ |
| 1581 | present_elems = NULL; |
| 1582 | |
| 1583 | if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) |
| 1584 | ieee80211_put_eht_cap(skb, sdata, sband, |
| 1585 | &assoc_data->link[link_id].conn); |
| 1586 | |
| 1587 | if (sband->band == NL80211_BAND_S1GHZ) { |
| 1588 | ieee80211_add_aid_request_ie(sdata, skb); |
| 1589 | ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); |
| 1590 | } |
| 1591 | |
| 1592 | if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) |
| 1593 | skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); |
| 1594 | |
| 1595 | return offset; |
| 1596 | } |
| 1597 | |
| 1598 | static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, |
| 1599 | const u16 *outer, |
| 1600 | const u16 *inner) |
| 1601 | { |
| 1602 | unsigned int skb_len = skb->len; |
| 1603 | bool at_extension = false; |
| 1604 | bool added = false; |
| 1605 | int i, j; |
| 1606 | u8 *len, *list_len = NULL; |
| 1607 | |
| 1608 | skb_put_u8(skb, WLAN_EID_EXTENSION); |
| 1609 | len = skb_put(skb, 1); |
| 1610 | skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); |
| 1611 | |
| 1612 | for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { |
| 1613 | u16 elem = outer[i]; |
| 1614 | bool have_inner = false; |
| 1615 | |
| 1616 | /* should at least be sorted in the sense of normal -> ext */ |
| 1617 | WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); |
| 1618 | |
| 1619 | /* switch to extension list */ |
| 1620 | if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { |
| 1621 | at_extension = true; |
| 1622 | if (!list_len) |
| 1623 | skb_put_u8(skb, 0); |
| 1624 | list_len = NULL; |
| 1625 | } |
| 1626 | |
| 1627 | for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { |
| 1628 | if (elem == inner[j]) { |
| 1629 | have_inner = true; |
| 1630 | break; |
| 1631 | } |
| 1632 | } |
| 1633 | |
| 1634 | if (have_inner) |
| 1635 | continue; |
| 1636 | |
| 1637 | if (!list_len) { |
| 1638 | list_len = skb_put(skb, 1); |
| 1639 | *list_len = 0; |
| 1640 | } |
| 1641 | *list_len += 1; |
| 1642 | skb_put_u8(skb, (u8)elem); |
| 1643 | added = true; |
| 1644 | } |
| 1645 | |
| 1646 | /* if we added a list but no extension list, make a zero-len one */ |
| 1647 | if (added && (!at_extension || !list_len)) |
| 1648 | skb_put_u8(skb, 0); |
| 1649 | |
| 1650 | /* if nothing added remove extension element completely */ |
| 1651 | if (!added) |
| 1652 | skb_trim(skb, skb_len); |
| 1653 | else |
| 1654 | *len = skb->len - skb_len - 2; |
| 1655 | } |
| 1656 | |
| 1657 | static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, |
| 1658 | struct sk_buff *skb, u16 capab, |
| 1659 | const struct element *ext_capa, |
| 1660 | const u16 *outer_present_elems) |
| 1661 | { |
| 1662 | struct ieee80211_local *local = sdata->local; |
| 1663 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 1664 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; |
| 1665 | struct ieee80211_multi_link_elem *ml_elem; |
| 1666 | struct ieee80211_mle_basic_common_info *common; |
| 1667 | const struct wiphy_iftype_ext_capab *ift_ext_capa; |
| 1668 | __le16 eml_capa = 0, mld_capa_ops = 0; |
| 1669 | unsigned int link_id; |
| 1670 | u8 *ml_elem_len; |
| 1671 | void *capab_pos; |
| 1672 | |
| 1673 | if (!ieee80211_vif_is_mld(&sdata->vif)) |
| 1674 | return; |
| 1675 | |
| 1676 | ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, |
| 1677 | ieee80211_vif_type_p2p(&sdata->vif)); |
| 1678 | if (ift_ext_capa) { |
| 1679 | eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); |
| 1680 | mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); |
| 1681 | } |
| 1682 | |
| 1683 | skb_put_u8(skb, WLAN_EID_EXTENSION); |
| 1684 | ml_elem_len = skb_put(skb, 1); |
| 1685 | skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); |
| 1686 | ml_elem = skb_put(skb, sizeof(*ml_elem)); |
| 1687 | ml_elem->control = |
| 1688 | cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | |
| 1689 | IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); |
| 1690 | common = skb_put(skb, sizeof(*common)); |
| 1691 | common->len = sizeof(*common) + |
| 1692 | 2; /* MLD capa/ops */ |
| 1693 | memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); |
| 1694 | |
| 1695 | /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ |
| 1696 | if (eml_capa & |
| 1697 | cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | |
| 1698 | IEEE80211_EML_CAP_EMLMR_SUPPORT))) { |
| 1699 | common->len += 2; /* EML capabilities */ |
| 1700 | ml_elem->control |= |
| 1701 | cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); |
| 1702 | skb_put_data(skb, &eml_capa, sizeof(eml_capa)); |
| 1703 | } |
| 1704 | skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); |
| 1705 | |
| 1706 | for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { |
| 1707 | u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; |
| 1708 | const u8 *extra_elems; |
| 1709 | size_t extra_elems_len; |
| 1710 | size_t extra_used; |
| 1711 | u8 *subelem_len = NULL; |
| 1712 | __le16 ctrl; |
| 1713 | |
| 1714 | if (!assoc_data->link[link_id].bss || |
| 1715 | link_id == assoc_data->assoc_link_id) |
| 1716 | continue; |
| 1717 | |
| 1718 | extra_elems = assoc_data->link[link_id].elems; |
| 1719 | extra_elems_len = assoc_data->link[link_id].elems_len; |
| 1720 | |
| 1721 | skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); |
| 1722 | subelem_len = skb_put(skb, 1); |
| 1723 | |
| 1724 | ctrl = cpu_to_le16(link_id | |
| 1725 | IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | |
| 1726 | IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); |
| 1727 | skb_put_data(skb, &ctrl, sizeof(ctrl)); |
| 1728 | skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ |
| 1729 | skb_put_data(skb, assoc_data->link[link_id].addr, |
| 1730 | ETH_ALEN); |
| 1731 | /* |
| 1732 | * Now add the contents of the (re)association request, |
| 1733 | * but the "listen interval" and "current AP address" |
| 1734 | * (if applicable) are skipped. So we only have |
| 1735 | * the capability field (remember the position and fill |
| 1736 | * later), followed by the elements added below by |
| 1737 | * calling ieee80211_assoc_link_elems(). |
| 1738 | */ |
| 1739 | capab_pos = skb_put(skb, 2); |
| 1740 | |
| 1741 | extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, |
| 1742 | ext_capa, |
| 1743 | extra_elems, |
| 1744 | extra_elems_len, |
| 1745 | link_id, NULL, |
| 1746 | link_present_elems); |
| 1747 | if (extra_elems) |
| 1748 | skb_put_data(skb, extra_elems + extra_used, |
| 1749 | extra_elems_len - extra_used); |
| 1750 | |
| 1751 | put_unaligned_le16(capab, capab_pos); |
| 1752 | |
| 1753 | ieee80211_add_non_inheritance_elem(skb, outer_present_elems, |
| 1754 | link_present_elems); |
| 1755 | |
| 1756 | ieee80211_fragment_element(skb, subelem_len, |
| 1757 | IEEE80211_MLE_SUBELEM_FRAGMENT); |
| 1758 | } |
| 1759 | |
| 1760 | ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); |
| 1761 | } |
| 1762 | |
| 1763 | static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) |
| 1764 | { |
| 1765 | struct ieee80211_local *local = sdata->local; |
| 1766 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 1767 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; |
| 1768 | struct ieee80211_link_data *link; |
| 1769 | struct sk_buff *skb; |
| 1770 | struct ieee80211_mgmt *mgmt; |
| 1771 | u8 *pos, qos_info, *ie_start; |
| 1772 | size_t offset, noffset; |
| 1773 | u16 capab = 0, link_capab; |
| 1774 | __le16 listen_int; |
| 1775 | struct element *ext_capa = NULL; |
| 1776 | enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); |
| 1777 | struct ieee80211_prep_tx_info info = {}; |
| 1778 | unsigned int link_id, n_links = 0; |
| 1779 | u16 present_elems[PRESENT_ELEMS_MAX] = {}; |
| 1780 | void *capab_pos; |
| 1781 | size_t size; |
| 1782 | int ret; |
| 1783 | |
| 1784 | /* we know it's writable, cast away the const */ |
| 1785 | if (assoc_data->ie_len) |
| 1786 | ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, |
| 1787 | assoc_data->ie, |
| 1788 | assoc_data->ie_len); |
| 1789 | |
| 1790 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 1791 | |
| 1792 | size = local->hw.extra_tx_headroom + |
| 1793 | sizeof(*mgmt) + /* bit too much but doesn't matter */ |
| 1794 | 2 + assoc_data->ssid_len + /* SSID */ |
| 1795 | assoc_data->ie_len + /* extra IEs */ |
| 1796 | (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + |
| 1797 | 9; /* WMM */ |
| 1798 | |
| 1799 | for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { |
| 1800 | struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; |
| 1801 | const struct ieee80211_sband_iftype_data *iftd; |
| 1802 | struct ieee80211_supported_band *sband; |
| 1803 | |
| 1804 | if (!cbss) |
| 1805 | continue; |
| 1806 | |
| 1807 | sband = local->hw.wiphy->bands[cbss->channel->band]; |
| 1808 | |
| 1809 | n_links++; |
| 1810 | /* add STA profile elements length */ |
| 1811 | size += assoc_data->link[link_id].elems_len; |
| 1812 | /* and supported rates length */ |
| 1813 | size += 4 + sband->n_bitrates; |
| 1814 | /* supported channels */ |
| 1815 | size += 2 + 2 * sband->n_channels; |
| 1816 | |
| 1817 | iftd = ieee80211_get_sband_iftype_data(sband, iftype); |
| 1818 | if (iftd) |
| 1819 | size += iftd->vendor_elems.len; |
| 1820 | |
| 1821 | /* power capability */ |
| 1822 | size += 4; |
| 1823 | |
| 1824 | /* HT, VHT, HE, EHT */ |
| 1825 | size += 2 + sizeof(struct ieee80211_ht_cap); |
| 1826 | size += 2 + sizeof(struct ieee80211_vht_cap); |
| 1827 | size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + |
| 1828 | sizeof(struct ieee80211_he_mcs_nss_supp) + |
| 1829 | IEEE80211_HE_PPE_THRES_MAX_LEN; |
| 1830 | |
| 1831 | if (sband->band == NL80211_BAND_6GHZ) |
| 1832 | size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); |
| 1833 | |
| 1834 | size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + |
| 1835 | sizeof(struct ieee80211_eht_mcs_nss_supp) + |
| 1836 | IEEE80211_EHT_PPE_THRES_MAX_LEN; |
| 1837 | |
| 1838 | /* non-inheritance element */ |
| 1839 | size += 2 + 2 + PRESENT_ELEMS_MAX; |
| 1840 | |
| 1841 | /* should be the same across all BSSes */ |
| 1842 | if (cbss->capability & WLAN_CAPABILITY_PRIVACY) |
| 1843 | capab |= WLAN_CAPABILITY_PRIVACY; |
| 1844 | } |
| 1845 | |
| 1846 | if (ieee80211_vif_is_mld(&sdata->vif)) { |
| 1847 | /* consider the multi-link element with STA profile */ |
| 1848 | size += sizeof(struct ieee80211_multi_link_elem); |
| 1849 | /* max common info field in basic multi-link element */ |
| 1850 | size += sizeof(struct ieee80211_mle_basic_common_info) + |
| 1851 | 2 + /* capa & op */ |
| 1852 | 2; /* EML capa */ |
| 1853 | |
| 1854 | /* |
| 1855 | * The capability elements were already considered above; |
| 1856 | * note this over-estimates a bit because there's no |
| 1857 | * STA profile for the assoc link. |
| 1858 | */ |
| 1859 | size += (n_links - 1) * |
| 1860 | (1 + 1 + /* subelement ID/length */ |
| 1861 | 2 + /* STA control */ |
| 1862 | 1 + ETH_ALEN + 2 /* STA Info field */); |
| 1863 | } |
| 1864 | |
| 1865 | link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); |
| 1866 | if (WARN_ON(!link)) |
| 1867 | return -EINVAL; |
| 1868 | |
| 1869 | if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) |
| 1870 | return -EINVAL; |
| 1871 | |
| 1872 | skb = alloc_skb(size, GFP_KERNEL); |
| 1873 | if (!skb) |
| 1874 | return -ENOMEM; |
| 1875 | |
| 1876 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 1877 | |
| 1878 | if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) |
| 1879 | capab |= WLAN_CAPABILITY_RADIO_MEASURE; |
| 1880 | |
| 1881 | /* Set MBSSID support for HE AP if needed */ |
| 1882 | if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && |
| 1883 | link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && |
| 1884 | ext_capa && ext_capa->datalen >= 3) |
| 1885 | ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; |
| 1886 | |
| 1887 | mgmt = skb_put_zero(skb, 24); |
| 1888 | memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); |
| 1889 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
| 1890 | memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); |
| 1891 | |
| 1892 | listen_int = cpu_to_le16(assoc_data->s1g ? |
| 1893 | ieee80211_encode_usf(local->hw.conf.listen_interval) : |
| 1894 | local->hw.conf.listen_interval); |
| 1895 | if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { |
| 1896 | skb_put(skb, 10); |
| 1897 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 1898 | IEEE80211_STYPE_REASSOC_REQ); |
| 1899 | capab_pos = &mgmt->u.reassoc_req.capab_info; |
| 1900 | mgmt->u.reassoc_req.listen_interval = listen_int; |
| 1901 | memcpy(mgmt->u.reassoc_req.current_ap, |
| 1902 | assoc_data->prev_ap_addr, ETH_ALEN); |
| 1903 | info.subtype = IEEE80211_STYPE_REASSOC_REQ; |
| 1904 | } else { |
| 1905 | skb_put(skb, 4); |
| 1906 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 1907 | IEEE80211_STYPE_ASSOC_REQ); |
| 1908 | capab_pos = &mgmt->u.assoc_req.capab_info; |
| 1909 | mgmt->u.assoc_req.listen_interval = listen_int; |
| 1910 | info.subtype = IEEE80211_STYPE_ASSOC_REQ; |
| 1911 | } |
| 1912 | |
| 1913 | /* SSID */ |
| 1914 | pos = skb_put(skb, 2 + assoc_data->ssid_len); |
| 1915 | ie_start = pos; |
| 1916 | *pos++ = WLAN_EID_SSID; |
| 1917 | *pos++ = assoc_data->ssid_len; |
| 1918 | memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); |
| 1919 | |
| 1920 | /* |
| 1921 | * This bit is technically reserved, so it shouldn't matter for either |
| 1922 | * the AP or us, but it also means we shouldn't set it. However, we've |
| 1923 | * always set it in the past, and apparently some EHT APs check that |
| 1924 | * we don't set it. To avoid interoperability issues with old APs that |
| 1925 | * for some reason check it and want it to be set, set the bit for all |
| 1926 | * pre-EHT connections as we used to do. |
| 1927 | */ |
| 1928 | if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT) |
| 1929 | capab |= WLAN_CAPABILITY_ESS; |
| 1930 | |
| 1931 | /* add the elements for the assoc (main) link */ |
| 1932 | link_capab = capab; |
| 1933 | offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, |
| 1934 | ext_capa, |
| 1935 | assoc_data->ie, |
| 1936 | assoc_data->ie_len, |
| 1937 | assoc_data->assoc_link_id, link, |
| 1938 | present_elems); |
| 1939 | put_unaligned_le16(link_capab, capab_pos); |
| 1940 | |
| 1941 | /* if present, add any custom non-vendor IEs */ |
| 1942 | if (assoc_data->ie_len) { |
| 1943 | noffset = ieee80211_ie_split_vendor(assoc_data->ie, |
| 1944 | assoc_data->ie_len, |
| 1945 | offset); |
| 1946 | skb_put_data(skb, assoc_data->ie + offset, noffset - offset); |
| 1947 | offset = noffset; |
| 1948 | } |
| 1949 | |
| 1950 | if (assoc_data->wmm) { |
| 1951 | if (assoc_data->uapsd) { |
| 1952 | qos_info = ifmgd->uapsd_queues; |
| 1953 | qos_info |= (ifmgd->uapsd_max_sp_len << |
| 1954 | IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); |
| 1955 | } else { |
| 1956 | qos_info = 0; |
| 1957 | } |
| 1958 | |
| 1959 | pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); |
| 1960 | } |
| 1961 | |
| 1962 | /* add any remaining custom (i.e. vendor specific here) IEs */ |
| 1963 | if (assoc_data->ie_len) { |
| 1964 | noffset = assoc_data->ie_len; |
| 1965 | skb_put_data(skb, assoc_data->ie + offset, noffset - offset); |
| 1966 | } |
| 1967 | |
| 1968 | if (assoc_data->fils_kek_len) { |
| 1969 | ret = fils_encrypt_assoc_req(skb, assoc_data); |
| 1970 | if (ret < 0) { |
| 1971 | dev_kfree_skb(skb); |
| 1972 | return ret; |
| 1973 | } |
| 1974 | } |
| 1975 | |
| 1976 | pos = skb_tail_pointer(skb); |
| 1977 | kfree(ifmgd->assoc_req_ies); |
| 1978 | ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); |
| 1979 | if (!ifmgd->assoc_req_ies) { |
| 1980 | dev_kfree_skb(skb); |
| 1981 | return -ENOMEM; |
| 1982 | } |
| 1983 | |
| 1984 | ifmgd->assoc_req_ies_len = pos - ie_start; |
| 1985 | |
| 1986 | info.link_id = assoc_data->assoc_link_id; |
| 1987 | drv_mgd_prepare_tx(local, sdata, &info); |
| 1988 | |
| 1989 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| 1990 | if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) |
| 1991 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | |
| 1992 | IEEE80211_TX_INTFL_MLME_CONN_TX; |
| 1993 | ieee80211_tx_skb(sdata, skb); |
| 1994 | |
| 1995 | return 0; |
| 1996 | } |
| 1997 | |
| 1998 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
| 1999 | struct ieee80211_sub_if_data *sdata) |
| 2000 | { |
| 2001 | struct ieee80211_pspoll *pspoll; |
| 2002 | struct sk_buff *skb; |
| 2003 | |
| 2004 | skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); |
| 2005 | if (!skb) |
| 2006 | return; |
| 2007 | |
| 2008 | pspoll = (struct ieee80211_pspoll *) skb->data; |
| 2009 | pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
| 2010 | |
| 2011 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| 2012 | ieee80211_tx_skb(sdata, skb); |
| 2013 | } |
| 2014 | |
| 2015 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
| 2016 | struct ieee80211_sub_if_data *sdata, |
| 2017 | bool powersave) |
| 2018 | { |
| 2019 | struct sk_buff *skb; |
| 2020 | struct ieee80211_hdr_3addr *nullfunc; |
| 2021 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 2022 | |
| 2023 | skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, |
| 2024 | !ieee80211_hw_check(&local->hw, |
| 2025 | DOESNT_SUPPORT_QOS_NDP)); |
| 2026 | if (!skb) |
| 2027 | return; |
| 2028 | |
| 2029 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; |
| 2030 | if (powersave) |
| 2031 | nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
| 2032 | |
| 2033 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | |
| 2034 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK; |
| 2035 | |
| 2036 | if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) |
| 2037 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; |
| 2038 | |
| 2039 | if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) |
| 2040 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; |
| 2041 | |
| 2042 | ieee80211_tx_skb(sdata, skb); |
| 2043 | } |
| 2044 | |
| 2045 | void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, |
| 2046 | struct ieee80211_sub_if_data *sdata) |
| 2047 | { |
| 2048 | struct sk_buff *skb; |
| 2049 | struct ieee80211_hdr *nullfunc; |
| 2050 | __le16 fc; |
| 2051 | |
| 2052 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
| 2053 | return; |
| 2054 | |
| 2055 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); |
| 2056 | if (!skb) |
| 2057 | return; |
| 2058 | |
| 2059 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 2060 | |
| 2061 | nullfunc = skb_put_zero(skb, 30); |
| 2062 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | |
| 2063 | IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
| 2064 | nullfunc->frame_control = fc; |
| 2065 | memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); |
| 2066 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); |
| 2067 | memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); |
| 2068 | memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); |
| 2069 | |
| 2070 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| 2071 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; |
| 2072 | ieee80211_tx_skb(sdata, skb); |
| 2073 | } |
| 2074 | |
| 2075 | /* spectrum management related things */ |
| 2076 | static void ieee80211_csa_switch_work(struct wiphy *wiphy, |
| 2077 | struct wiphy_work *work) |
| 2078 | { |
| 2079 | struct ieee80211_link_data *link = |
| 2080 | container_of(work, struct ieee80211_link_data, |
| 2081 | u.mgd.csa.switch_work.work); |
| 2082 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 2083 | struct ieee80211_local *local = sdata->local; |
| 2084 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 2085 | int ret; |
| 2086 | |
| 2087 | if (!ieee80211_sdata_running(sdata)) |
| 2088 | return; |
| 2089 | |
| 2090 | lockdep_assert_wiphy(local->hw.wiphy); |
| 2091 | |
| 2092 | if (!ifmgd->associated) |
| 2093 | return; |
| 2094 | |
| 2095 | if (!link->conf->csa_active) |
| 2096 | return; |
| 2097 | |
| 2098 | /* |
| 2099 | * If the link isn't active (now), we cannot wait for beacons, won't |
| 2100 | * have a reserved chanctx, etc. Just switch over the chandef and |
| 2101 | * update cfg80211 directly. |
| 2102 | */ |
| 2103 | if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { |
| 2104 | link->conf->chanreq = link->csa.chanreq; |
| 2105 | cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, |
| 2106 | link->link_id); |
| 2107 | return; |
| 2108 | } |
| 2109 | |
| 2110 | /* |
| 2111 | * using reservation isn't immediate as it may be deferred until later |
| 2112 | * with multi-vif. once reservation is complete it will re-schedule the |
| 2113 | * work with no reserved_chanctx so verify chandef to check if it |
| 2114 | * completed successfully |
| 2115 | */ |
| 2116 | |
| 2117 | if (link->reserved_chanctx) { |
| 2118 | /* |
| 2119 | * with multi-vif csa driver may call ieee80211_csa_finish() |
| 2120 | * many times while waiting for other interfaces to use their |
| 2121 | * reservations |
| 2122 | */ |
| 2123 | if (link->reserved_ready) |
| 2124 | return; |
| 2125 | |
| 2126 | ret = ieee80211_link_use_reserved_context(link); |
| 2127 | if (ret) { |
| 2128 | link_info(link, |
| 2129 | "failed to use reserved channel context, disconnecting (err=%d)\n", |
| 2130 | ret); |
| 2131 | wiphy_work_queue(sdata->local->hw.wiphy, |
| 2132 | &ifmgd->csa_connection_drop_work); |
| 2133 | } |
| 2134 | return; |
| 2135 | } |
| 2136 | |
| 2137 | if (!ieee80211_chanreq_identical(&link->conf->chanreq, |
| 2138 | &link->csa.chanreq)) { |
| 2139 | link_info(link, |
| 2140 | "failed to finalize channel switch, disconnecting\n"); |
| 2141 | wiphy_work_queue(sdata->local->hw.wiphy, |
| 2142 | &ifmgd->csa_connection_drop_work); |
| 2143 | return; |
| 2144 | } |
| 2145 | |
| 2146 | link->u.mgd.csa.waiting_bcn = true; |
| 2147 | |
| 2148 | /* apply new TPE restrictions immediately on the new channel */ |
| 2149 | if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && |
| 2150 | link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { |
| 2151 | ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, |
| 2152 | &link->u.mgd.csa.ap_chandef, |
| 2153 | &link->conf->chanreq.oper); |
| 2154 | if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, |
| 2155 | sizeof(link->u.mgd.csa.tpe))) { |
| 2156 | link->conf->tpe = link->u.mgd.csa.tpe; |
| 2157 | ieee80211_link_info_change_notify(sdata, link, |
| 2158 | BSS_CHANGED_TPE); |
| 2159 | } |
| 2160 | } |
| 2161 | |
| 2162 | ieee80211_sta_reset_beacon_monitor(sdata); |
| 2163 | ieee80211_sta_reset_conn_monitor(sdata); |
| 2164 | } |
| 2165 | |
| 2166 | static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) |
| 2167 | { |
| 2168 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 2169 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 2170 | int ret; |
| 2171 | |
| 2172 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 2173 | |
| 2174 | WARN_ON(!link->conf->csa_active); |
| 2175 | |
| 2176 | ieee80211_vif_unblock_queues_csa(sdata); |
| 2177 | |
| 2178 | link->conf->csa_active = false; |
| 2179 | link->u.mgd.csa.blocked_tx = false; |
| 2180 | link->u.mgd.csa.waiting_bcn = false; |
| 2181 | |
| 2182 | ret = drv_post_channel_switch(link); |
| 2183 | if (ret) { |
| 2184 | link_info(link, |
| 2185 | "driver post channel switch failed, disconnecting\n"); |
| 2186 | wiphy_work_queue(sdata->local->hw.wiphy, |
| 2187 | &ifmgd->csa_connection_drop_work); |
| 2188 | return; |
| 2189 | } |
| 2190 | |
| 2191 | cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, |
| 2192 | link->link_id); |
| 2193 | } |
| 2194 | |
| 2195 | void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, |
| 2196 | unsigned int link_id) |
| 2197 | { |
| 2198 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 2199 | |
| 2200 | trace_api_chswitch_done(sdata, success, link_id); |
| 2201 | |
| 2202 | rcu_read_lock(); |
| 2203 | |
| 2204 | if (!success) { |
| 2205 | sdata_info(sdata, |
| 2206 | "driver channel switch failed (link %d), disconnecting\n", |
| 2207 | link_id); |
| 2208 | wiphy_work_queue(sdata->local->hw.wiphy, |
| 2209 | &sdata->u.mgd.csa_connection_drop_work); |
| 2210 | } else { |
| 2211 | struct ieee80211_link_data *link = |
| 2212 | rcu_dereference(sdata->link[link_id]); |
| 2213 | |
| 2214 | if (WARN_ON(!link)) { |
| 2215 | rcu_read_unlock(); |
| 2216 | return; |
| 2217 | } |
| 2218 | |
| 2219 | wiphy_delayed_work_queue(sdata->local->hw.wiphy, |
| 2220 | &link->u.mgd.csa.switch_work, 0); |
| 2221 | } |
| 2222 | |
| 2223 | rcu_read_unlock(); |
| 2224 | } |
| 2225 | EXPORT_SYMBOL(ieee80211_chswitch_done); |
| 2226 | |
| 2227 | static void |
| 2228 | ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) |
| 2229 | { |
| 2230 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 2231 | struct ieee80211_local *local = sdata->local; |
| 2232 | |
| 2233 | lockdep_assert_wiphy(local->hw.wiphy); |
| 2234 | |
| 2235 | if (!local->ops->abort_channel_switch) |
| 2236 | return; |
| 2237 | |
| 2238 | ieee80211_link_unreserve_chanctx(link); |
| 2239 | |
| 2240 | ieee80211_vif_unblock_queues_csa(sdata); |
| 2241 | |
| 2242 | link->conf->csa_active = false; |
| 2243 | link->u.mgd.csa.blocked_tx = false; |
| 2244 | |
| 2245 | drv_abort_channel_switch(link); |
| 2246 | } |
| 2247 | |
| 2248 | struct sta_csa_rnr_iter_data { |
| 2249 | struct ieee80211_link_data *link; |
| 2250 | struct ieee80211_channel *chan; |
| 2251 | u8 mld_id; |
| 2252 | }; |
| 2253 | |
| 2254 | static enum cfg80211_rnr_iter_ret |
| 2255 | ieee80211_sta_csa_rnr_iter(void *_data, u8 type, |
| 2256 | const struct ieee80211_neighbor_ap_info *info, |
| 2257 | const u8 *tbtt_info, u8 tbtt_info_len) |
| 2258 | { |
| 2259 | struct sta_csa_rnr_iter_data *data = _data; |
| 2260 | struct ieee80211_link_data *link = data->link; |
| 2261 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 2262 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 2263 | const struct ieee80211_tbtt_info_ge_11 *ti; |
| 2264 | enum nl80211_band band; |
| 2265 | unsigned int center_freq; |
| 2266 | int link_id; |
| 2267 | |
| 2268 | if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) |
| 2269 | return RNR_ITER_CONTINUE; |
| 2270 | |
| 2271 | if (tbtt_info_len < sizeof(*ti)) |
| 2272 | return RNR_ITER_CONTINUE; |
| 2273 | |
| 2274 | ti = (const void *)tbtt_info; |
| 2275 | |
| 2276 | if (ti->mld_params.mld_id != data->mld_id) |
| 2277 | return RNR_ITER_CONTINUE; |
| 2278 | |
| 2279 | link_id = le16_get_bits(ti->mld_params.params, |
| 2280 | IEEE80211_RNR_MLD_PARAMS_LINK_ID); |
| 2281 | if (link_id != data->link->link_id) |
| 2282 | return RNR_ITER_CONTINUE; |
| 2283 | |
| 2284 | /* we found the entry for our link! */ |
| 2285 | |
| 2286 | /* this AP is confused, it had this right before ... just disconnect */ |
| 2287 | if (!ieee80211_operating_class_to_band(info->op_class, &band)) { |
| 2288 | link_info(link, |
| 2289 | "AP now has invalid operating class in RNR, disconnect\n"); |
| 2290 | wiphy_work_queue(sdata->local->hw.wiphy, |
| 2291 | &ifmgd->csa_connection_drop_work); |
| 2292 | return RNR_ITER_BREAK; |
| 2293 | } |
| 2294 | |
| 2295 | center_freq = ieee80211_channel_to_frequency(info->channel, band); |
| 2296 | data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); |
| 2297 | |
| 2298 | return RNR_ITER_BREAK; |
| 2299 | } |
| 2300 | |
| 2301 | static void |
| 2302 | ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, |
| 2303 | struct ieee802_11_elems *elems) |
| 2304 | { |
| 2305 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 2306 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 2307 | struct sta_csa_rnr_iter_data data = { |
| 2308 | .link = link, |
| 2309 | }; |
| 2310 | |
| 2311 | /* |
| 2312 | * If we get here, we see a beacon from another link without |
| 2313 | * CSA still being reported for it, so now we have to check |
| 2314 | * if the CSA was aborted or completed. This may not even be |
| 2315 | * perfectly possible if the CSA was only done for changing |
| 2316 | * the puncturing, but in that case if the link in inactive |
| 2317 | * we don't really care, and if it's an active link (or when |
| 2318 | * it's activated later) we'll get a beacon and adjust. |
| 2319 | */ |
| 2320 | |
| 2321 | if (WARN_ON(!elems->ml_basic)) |
| 2322 | return; |
| 2323 | |
| 2324 | data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); |
| 2325 | |
| 2326 | /* |
| 2327 | * So in order to do this, iterate the RNR element(s) and see |
| 2328 | * what channel is reported now. |
| 2329 | */ |
| 2330 | cfg80211_iter_rnr(elems->ie_start, elems->total_len, |
| 2331 | ieee80211_sta_csa_rnr_iter, &data); |
| 2332 | |
| 2333 | if (!data.chan) { |
| 2334 | link_info(link, |
| 2335 | "couldn't find (valid) channel in RNR for CSA, disconnect\n"); |
| 2336 | wiphy_work_queue(sdata->local->hw.wiphy, |
| 2337 | &ifmgd->csa_connection_drop_work); |
| 2338 | return; |
| 2339 | } |
| 2340 | |
| 2341 | /* |
| 2342 | * If it doesn't match the CSA, then assume it aborted. This |
| 2343 | * may erroneously detect that it was _not_ aborted when it |
| 2344 | * was in fact aborted, but only changed the bandwidth or the |
| 2345 | * puncturing configuration, but we don't have enough data to |
| 2346 | * detect that. |
| 2347 | */ |
| 2348 | if (data.chan != link->csa.chanreq.oper.chan) |
| 2349 | ieee80211_sta_abort_chanswitch(link); |
| 2350 | } |
| 2351 | |
| 2352 | enum ieee80211_csa_source { |
| 2353 | IEEE80211_CSA_SOURCE_BEACON, |
| 2354 | IEEE80211_CSA_SOURCE_OTHER_LINK, |
| 2355 | IEEE80211_CSA_SOURCE_PROT_ACTION, |
| 2356 | IEEE80211_CSA_SOURCE_UNPROT_ACTION, |
| 2357 | }; |
| 2358 | |
| 2359 | static void |
| 2360 | ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, |
| 2361 | u64 timestamp, u32 device_timestamp, |
| 2362 | struct ieee802_11_elems *full_elems, |
| 2363 | struct ieee802_11_elems *csa_elems, |
| 2364 | enum ieee80211_csa_source source) |
| 2365 | { |
| 2366 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 2367 | struct ieee80211_local *local = sdata->local; |
| 2368 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 2369 | struct ieee80211_chanctx *chanctx = NULL; |
| 2370 | struct ieee80211_chanctx_conf *conf; |
| 2371 | struct ieee80211_csa_ie csa_ie = {}; |
| 2372 | struct ieee80211_channel_switch ch_switch = { |
| 2373 | .link_id = link->link_id, |
| 2374 | .timestamp = timestamp, |
| 2375 | .device_timestamp = device_timestamp, |
| 2376 | }; |
| 2377 | unsigned long now; |
| 2378 | int res; |
| 2379 | |
| 2380 | lockdep_assert_wiphy(local->hw.wiphy); |
| 2381 | |
| 2382 | if (csa_elems) { |
| 2383 | struct cfg80211_bss *cbss = link->conf->bss; |
| 2384 | enum nl80211_band current_band; |
| 2385 | struct ieee80211_bss *bss; |
| 2386 | |
| 2387 | if (WARN_ON(!cbss)) |
| 2388 | return; |
| 2389 | |
| 2390 | current_band = cbss->channel->band; |
| 2391 | bss = (void *)cbss->priv; |
| 2392 | |
| 2393 | res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, |
| 2394 | current_band, |
| 2395 | bss->vht_cap_info, |
| 2396 | &link->u.mgd.conn, |
| 2397 | link->u.mgd.bssid, |
| 2398 | source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, |
| 2399 | &csa_ie); |
| 2400 | if (res == 0) { |
| 2401 | ch_switch.block_tx = csa_ie.mode; |
| 2402 | ch_switch.chandef = csa_ie.chanreq.oper; |
| 2403 | ch_switch.count = csa_ie.count; |
| 2404 | ch_switch.delay = csa_ie.max_switch_time; |
| 2405 | } |
| 2406 | |
| 2407 | link->u.mgd.csa.tpe = csa_elems->csa_tpe; |
| 2408 | } else { |
| 2409 | /* |
| 2410 | * If there was no per-STA profile for this link, we |
| 2411 | * get called with csa_elems == NULL. This of course means |
| 2412 | * there are no CSA elements, so set res=1 indicating |
| 2413 | * no more CSA. |
| 2414 | */ |
| 2415 | res = 1; |
| 2416 | } |
| 2417 | |
| 2418 | if (res < 0) { |
| 2419 | /* ignore this case, not a protected frame */ |
| 2420 | if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) |
| 2421 | return; |
| 2422 | goto drop_connection; |
| 2423 | } |
| 2424 | |
| 2425 | if (link->conf->csa_active) { |
| 2426 | switch (source) { |
| 2427 | case IEEE80211_CSA_SOURCE_PROT_ACTION: |
| 2428 | case IEEE80211_CSA_SOURCE_UNPROT_ACTION: |
| 2429 | /* already processing - disregard action frames */ |
| 2430 | return; |
| 2431 | case IEEE80211_CSA_SOURCE_BEACON: |
| 2432 | if (link->u.mgd.csa.waiting_bcn) { |
| 2433 | ieee80211_chswitch_post_beacon(link); |
| 2434 | /* |
| 2435 | * If the CSA is still present after the switch |
| 2436 | * we need to consider it as a new CSA (possibly |
| 2437 | * to self). This happens by not returning here |
| 2438 | * so we'll get to the check below. |
| 2439 | */ |
| 2440 | } else if (res) { |
| 2441 | ieee80211_sta_abort_chanswitch(link); |
| 2442 | return; |
| 2443 | } else { |
| 2444 | drv_channel_switch_rx_beacon(sdata, &ch_switch); |
| 2445 | return; |
| 2446 | } |
| 2447 | break; |
| 2448 | case IEEE80211_CSA_SOURCE_OTHER_LINK: |
| 2449 | /* active link: we want to see the beacon to continue */ |
| 2450 | if (ieee80211_vif_link_active(&sdata->vif, |
| 2451 | link->link_id)) |
| 2452 | return; |
| 2453 | |
| 2454 | /* switch work ran, so just complete the process */ |
| 2455 | if (link->u.mgd.csa.waiting_bcn) { |
| 2456 | ieee80211_chswitch_post_beacon(link); |
| 2457 | /* |
| 2458 | * If the CSA is still present after the switch |
| 2459 | * we need to consider it as a new CSA (possibly |
| 2460 | * to self). This happens by not returning here |
| 2461 | * so we'll get to the check below. |
| 2462 | */ |
| 2463 | break; |
| 2464 | } |
| 2465 | |
| 2466 | /* link still has CSA but we already know, do nothing */ |
| 2467 | if (!res) |
| 2468 | return; |
| 2469 | |
| 2470 | /* check in the RNR if the CSA aborted */ |
| 2471 | ieee80211_sta_other_link_csa_disappeared(link, |
| 2472 | full_elems); |
| 2473 | return; |
| 2474 | } |
| 2475 | } |
| 2476 | |
| 2477 | /* no active CSA nor a new one */ |
| 2478 | if (res) { |
| 2479 | /* |
| 2480 | * However, we may have stopped queues when receiving a public |
| 2481 | * action frame that couldn't be protected, if it had the quiet |
| 2482 | * bit set. This is a trade-off, we want to be quiet as soon as |
| 2483 | * possible, but also don't trust the public action frame much, |
| 2484 | * as it can't be protected. |
| 2485 | */ |
| 2486 | if (unlikely(link->u.mgd.csa.blocked_tx)) { |
| 2487 | link->u.mgd.csa.blocked_tx = false; |
| 2488 | ieee80211_vif_unblock_queues_csa(sdata); |
| 2489 | } |
| 2490 | return; |
| 2491 | } |
| 2492 | |
| 2493 | /* |
| 2494 | * We don't really trust public action frames, but block queues (go to |
| 2495 | * quiet mode) for them anyway, we should get a beacon soon to either |
| 2496 | * know what the CSA really is, or figure out the public action frame |
| 2497 | * was actually an attack. |
| 2498 | */ |
| 2499 | if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { |
| 2500 | if (csa_ie.mode) { |
| 2501 | link->u.mgd.csa.blocked_tx = true; |
| 2502 | ieee80211_vif_block_queues_csa(sdata); |
| 2503 | } |
| 2504 | return; |
| 2505 | } |
| 2506 | |
| 2507 | if (link->conf->chanreq.oper.chan->band != |
| 2508 | csa_ie.chanreq.oper.chan->band) { |
| 2509 | link_info(link, |
| 2510 | "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", |
| 2511 | link->u.mgd.bssid, |
| 2512 | csa_ie.chanreq.oper.chan->center_freq, |
| 2513 | csa_ie.chanreq.oper.width, |
| 2514 | csa_ie.chanreq.oper.center_freq1, |
| 2515 | csa_ie.chanreq.oper.center_freq2); |
| 2516 | goto drop_connection; |
| 2517 | } |
| 2518 | |
| 2519 | if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, |
| 2520 | IEEE80211_CHAN_DISABLED)) { |
| 2521 | link_info(link, |
| 2522 | "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", |
| 2523 | link->u.mgd.bssid, |
| 2524 | csa_ie.chanreq.oper.chan->center_freq, |
| 2525 | csa_ie.chanreq.oper.chan->freq_offset, |
| 2526 | csa_ie.chanreq.oper.width, |
| 2527 | csa_ie.chanreq.oper.center_freq1, |
| 2528 | csa_ie.chanreq.oper.freq1_offset, |
| 2529 | csa_ie.chanreq.oper.center_freq2); |
| 2530 | goto drop_connection; |
| 2531 | } |
| 2532 | |
| 2533 | if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, |
| 2534 | &link->conf->chanreq.oper) && |
| 2535 | (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { |
| 2536 | if (link->u.mgd.csa.ignored_same_chan) |
| 2537 | return; |
| 2538 | link_info(link, |
| 2539 | "AP %pM tries to chanswitch to same channel, ignore\n", |
| 2540 | link->u.mgd.bssid); |
| 2541 | link->u.mgd.csa.ignored_same_chan = true; |
| 2542 | return; |
| 2543 | } |
| 2544 | |
| 2545 | /* |
| 2546 | * Drop all TDLS peers on the affected link - either we disconnect or |
| 2547 | * move to a different channel from this point on. There's no telling |
| 2548 | * what our peer will do. |
| 2549 | * The TDLS WIDER_BW scenario is also problematic, as peers might now |
| 2550 | * have an incompatible wider chandef. |
| 2551 | */ |
| 2552 | ieee80211_teardown_tdls_peers(link); |
| 2553 | |
| 2554 | conf = rcu_dereference_protected(link->conf->chanctx_conf, |
| 2555 | lockdep_is_held(&local->hw.wiphy->mtx)); |
| 2556 | if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { |
| 2557 | link_info(link, |
| 2558 | "no channel context assigned to vif?, disconnecting\n"); |
| 2559 | goto drop_connection; |
| 2560 | } |
| 2561 | |
| 2562 | if (conf) |
| 2563 | chanctx = container_of(conf, struct ieee80211_chanctx, conf); |
| 2564 | |
| 2565 | if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { |
| 2566 | link_info(link, |
| 2567 | "driver doesn't support chan-switch with channel contexts\n"); |
| 2568 | goto drop_connection; |
| 2569 | } |
| 2570 | |
| 2571 | if (drv_pre_channel_switch(sdata, &ch_switch)) { |
| 2572 | link_info(link, |
| 2573 | "preparing for channel switch failed, disconnecting\n"); |
| 2574 | goto drop_connection; |
| 2575 | } |
| 2576 | |
| 2577 | link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; |
| 2578 | |
| 2579 | link->csa.chanreq.oper = csa_ie.chanreq.oper; |
| 2580 | ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, |
| 2581 | &csa_ie.chanreq.ap); |
| 2582 | |
| 2583 | if (chanctx) { |
| 2584 | res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, |
| 2585 | chanctx->mode, false); |
| 2586 | if (res) { |
| 2587 | link_info(link, |
| 2588 | "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", |
| 2589 | res); |
| 2590 | goto drop_connection; |
| 2591 | } |
| 2592 | } |
| 2593 | |
| 2594 | link->conf->csa_active = true; |
| 2595 | link->u.mgd.csa.ignored_same_chan = false; |
| 2596 | link->u.mgd.beacon_crc_valid = false; |
| 2597 | link->u.mgd.csa.blocked_tx = csa_ie.mode; |
| 2598 | |
| 2599 | if (csa_ie.mode) |
| 2600 | ieee80211_vif_block_queues_csa(sdata); |
| 2601 | |
| 2602 | cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, |
| 2603 | link->link_id, csa_ie.count, |
| 2604 | csa_ie.mode); |
| 2605 | |
| 2606 | /* we may have to handle timeout for deactivated link in software */ |
| 2607 | now = jiffies; |
| 2608 | link->u.mgd.csa.time = now + |
| 2609 | TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * |
| 2610 | link->conf->beacon_int); |
| 2611 | |
| 2612 | if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && |
| 2613 | local->ops->channel_switch) { |
| 2614 | /* |
| 2615 | * Use driver's channel switch callback, the driver will |
| 2616 | * later call ieee80211_chswitch_done(). It may deactivate |
| 2617 | * the link as well, we handle that elsewhere and queue |
| 2618 | * the csa.switch_work for the calculated time then. |
| 2619 | */ |
| 2620 | drv_channel_switch(local, sdata, &ch_switch); |
| 2621 | return; |
| 2622 | } |
| 2623 | |
| 2624 | /* channel switch handled in software */ |
| 2625 | wiphy_delayed_work_queue(local->hw.wiphy, |
| 2626 | &link->u.mgd.csa.switch_work, |
| 2627 | link->u.mgd.csa.time - now); |
| 2628 | return; |
| 2629 | drop_connection: |
| 2630 | /* |
| 2631 | * This is just so that the disconnect flow will know that |
| 2632 | * we were trying to switch channel and failed. In case the |
| 2633 | * mode is 1 (we are not allowed to Tx), we will know not to |
| 2634 | * send a deauthentication frame. Those two fields will be |
| 2635 | * reset when the disconnection worker runs. |
| 2636 | */ |
| 2637 | link->conf->csa_active = true; |
| 2638 | link->u.mgd.csa.blocked_tx = csa_ie.mode; |
| 2639 | sdata->csa_blocked_queues = |
| 2640 | csa_ie.mode && !ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA); |
| 2641 | |
| 2642 | wiphy_work_queue(sdata->local->hw.wiphy, |
| 2643 | &ifmgd->csa_connection_drop_work); |
| 2644 | } |
| 2645 | |
| 2646 | static bool |
| 2647 | ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, |
| 2648 | struct ieee80211_channel *channel, |
| 2649 | const u8 *country_ie, u8 country_ie_len, |
| 2650 | const u8 *pwr_constr_elem, |
| 2651 | int *chan_pwr, int *pwr_reduction) |
| 2652 | { |
| 2653 | struct ieee80211_country_ie_triplet *triplet; |
| 2654 | int chan = ieee80211_frequency_to_channel(channel->center_freq); |
| 2655 | int i, chan_increment; |
| 2656 | bool have_chan_pwr = false; |
| 2657 | |
| 2658 | /* Invalid IE */ |
| 2659 | if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) |
| 2660 | return false; |
| 2661 | |
| 2662 | triplet = (void *)(country_ie + 3); |
| 2663 | country_ie_len -= 3; |
| 2664 | |
| 2665 | switch (channel->band) { |
| 2666 | default: |
| 2667 | WARN_ON_ONCE(1); |
| 2668 | fallthrough; |
| 2669 | case NL80211_BAND_2GHZ: |
| 2670 | case NL80211_BAND_60GHZ: |
| 2671 | case NL80211_BAND_LC: |
| 2672 | chan_increment = 1; |
| 2673 | break; |
| 2674 | case NL80211_BAND_5GHZ: |
| 2675 | chan_increment = 4; |
| 2676 | break; |
| 2677 | case NL80211_BAND_6GHZ: |
| 2678 | /* |
| 2679 | * In the 6 GHz band, the "maximum transmit power level" |
| 2680 | * field in the triplets is reserved, and thus will be |
| 2681 | * zero and we shouldn't use it to control TX power. |
| 2682 | * The actual TX power will be given in the transmit |
| 2683 | * power envelope element instead. |
| 2684 | */ |
| 2685 | return false; |
| 2686 | } |
| 2687 | |
| 2688 | /* find channel */ |
| 2689 | while (country_ie_len >= 3) { |
| 2690 | u8 first_channel = triplet->chans.first_channel; |
| 2691 | |
| 2692 | if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) |
| 2693 | goto next; |
| 2694 | |
| 2695 | for (i = 0; i < triplet->chans.num_channels; i++) { |
| 2696 | if (first_channel + i * chan_increment == chan) { |
| 2697 | have_chan_pwr = true; |
| 2698 | *chan_pwr = triplet->chans.max_power; |
| 2699 | break; |
| 2700 | } |
| 2701 | } |
| 2702 | if (have_chan_pwr) |
| 2703 | break; |
| 2704 | |
| 2705 | next: |
| 2706 | triplet++; |
| 2707 | country_ie_len -= 3; |
| 2708 | } |
| 2709 | |
| 2710 | if (have_chan_pwr && pwr_constr_elem) |
| 2711 | *pwr_reduction = *pwr_constr_elem; |
| 2712 | else |
| 2713 | *pwr_reduction = 0; |
| 2714 | |
| 2715 | return have_chan_pwr; |
| 2716 | } |
| 2717 | |
| 2718 | static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, |
| 2719 | struct ieee80211_channel *channel, |
| 2720 | const u8 *cisco_dtpc_ie, |
| 2721 | int *pwr_level) |
| 2722 | { |
| 2723 | /* From practical testing, the first data byte of the DTPC element |
| 2724 | * seems to contain the requested dBm level, and the CLI on Cisco |
| 2725 | * APs clearly state the range is -127 to 127 dBm, which indicates |
| 2726 | * a signed byte, although it seemingly never actually goes negative. |
| 2727 | * The other byte seems to always be zero. |
| 2728 | */ |
| 2729 | *pwr_level = (__s8)cisco_dtpc_ie[4]; |
| 2730 | } |
| 2731 | |
| 2732 | static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, |
| 2733 | struct ieee80211_channel *channel, |
| 2734 | struct ieee80211_mgmt *mgmt, |
| 2735 | const u8 *country_ie, u8 country_ie_len, |
| 2736 | const u8 *pwr_constr_ie, |
| 2737 | const u8 *cisco_dtpc_ie) |
| 2738 | { |
| 2739 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 2740 | bool has_80211h_pwr = false, has_cisco_pwr = false; |
| 2741 | int chan_pwr = 0, pwr_reduction_80211h = 0; |
| 2742 | int pwr_level_cisco, pwr_level_80211h; |
| 2743 | int new_ap_level; |
| 2744 | __le16 capab = mgmt->u.probe_resp.capab_info; |
| 2745 | |
| 2746 | if (ieee80211_is_s1g_beacon(mgmt->frame_control)) |
| 2747 | return 0; /* TODO */ |
| 2748 | |
| 2749 | if (country_ie && |
| 2750 | (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || |
| 2751 | capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { |
| 2752 | has_80211h_pwr = ieee80211_find_80211h_pwr_constr( |
| 2753 | sdata, channel, country_ie, country_ie_len, |
| 2754 | pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); |
| 2755 | pwr_level_80211h = |
| 2756 | max_t(int, 0, chan_pwr - pwr_reduction_80211h); |
| 2757 | } |
| 2758 | |
| 2759 | if (cisco_dtpc_ie) { |
| 2760 | ieee80211_find_cisco_dtpc( |
| 2761 | sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); |
| 2762 | has_cisco_pwr = true; |
| 2763 | } |
| 2764 | |
| 2765 | if (!has_80211h_pwr && !has_cisco_pwr) |
| 2766 | return 0; |
| 2767 | |
| 2768 | /* If we have both 802.11h and Cisco DTPC, apply both limits |
| 2769 | * by picking the smallest of the two power levels advertised. |
| 2770 | */ |
| 2771 | if (has_80211h_pwr && |
| 2772 | (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { |
| 2773 | new_ap_level = pwr_level_80211h; |
| 2774 | |
| 2775 | if (link->ap_power_level == new_ap_level) |
| 2776 | return 0; |
| 2777 | |
| 2778 | sdata_dbg(sdata, |
| 2779 | "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", |
| 2780 | pwr_level_80211h, chan_pwr, pwr_reduction_80211h, |
| 2781 | link->u.mgd.bssid); |
| 2782 | } else { /* has_cisco_pwr is always true here. */ |
| 2783 | new_ap_level = pwr_level_cisco; |
| 2784 | |
| 2785 | if (link->ap_power_level == new_ap_level) |
| 2786 | return 0; |
| 2787 | |
| 2788 | sdata_dbg(sdata, |
| 2789 | "Limiting TX power to %d dBm as advertised by %pM\n", |
| 2790 | pwr_level_cisco, link->u.mgd.bssid); |
| 2791 | } |
| 2792 | |
| 2793 | link->ap_power_level = new_ap_level; |
| 2794 | if (__ieee80211_recalc_txpower(sdata)) |
| 2795 | return BSS_CHANGED_TXPOWER; |
| 2796 | return 0; |
| 2797 | } |
| 2798 | |
| 2799 | /* powersave */ |
| 2800 | static void ieee80211_enable_ps(struct ieee80211_local *local, |
| 2801 | struct ieee80211_sub_if_data *sdata) |
| 2802 | { |
| 2803 | struct ieee80211_conf *conf = &local->hw.conf; |
| 2804 | |
| 2805 | /* |
| 2806 | * If we are scanning right now then the parameters will |
| 2807 | * take effect when scan finishes. |
| 2808 | */ |
| 2809 | if (local->scanning) |
| 2810 | return; |
| 2811 | |
| 2812 | if (conf->dynamic_ps_timeout > 0 && |
| 2813 | !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { |
| 2814 | mod_timer(&local->dynamic_ps_timer, jiffies + |
| 2815 | msecs_to_jiffies(conf->dynamic_ps_timeout)); |
| 2816 | } else { |
| 2817 | if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) |
| 2818 | ieee80211_send_nullfunc(local, sdata, true); |
| 2819 | |
| 2820 | if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && |
| 2821 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) |
| 2822 | return; |
| 2823 | |
| 2824 | conf->flags |= IEEE80211_CONF_PS; |
| 2825 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
| 2826 | } |
| 2827 | } |
| 2828 | |
| 2829 | static void ieee80211_change_ps(struct ieee80211_local *local) |
| 2830 | { |
| 2831 | struct ieee80211_conf *conf = &local->hw.conf; |
| 2832 | |
| 2833 | if (local->ps_sdata) { |
| 2834 | ieee80211_enable_ps(local, local->ps_sdata); |
| 2835 | } else if (conf->flags & IEEE80211_CONF_PS) { |
| 2836 | conf->flags &= ~IEEE80211_CONF_PS; |
| 2837 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
| 2838 | del_timer_sync(&local->dynamic_ps_timer); |
| 2839 | wiphy_work_cancel(local->hw.wiphy, |
| 2840 | &local->dynamic_ps_enable_work); |
| 2841 | } |
| 2842 | } |
| 2843 | |
| 2844 | static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) |
| 2845 | { |
| 2846 | struct ieee80211_local *local = sdata->local; |
| 2847 | struct ieee80211_if_managed *mgd = &sdata->u.mgd; |
| 2848 | struct sta_info *sta = NULL; |
| 2849 | bool authorized = false; |
| 2850 | |
| 2851 | if (!mgd->powersave) |
| 2852 | return false; |
| 2853 | |
| 2854 | if (mgd->broken_ap) |
| 2855 | return false; |
| 2856 | |
| 2857 | if (!mgd->associated) |
| 2858 | return false; |
| 2859 | |
| 2860 | if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) |
| 2861 | return false; |
| 2862 | |
| 2863 | if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && |
| 2864 | !sdata->deflink.u.mgd.have_beacon) |
| 2865 | return false; |
| 2866 | |
| 2867 | rcu_read_lock(); |
| 2868 | sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); |
| 2869 | if (sta) |
| 2870 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
| 2871 | rcu_read_unlock(); |
| 2872 | |
| 2873 | return authorized; |
| 2874 | } |
| 2875 | |
| 2876 | /* need to hold RTNL or interface lock */ |
| 2877 | void ieee80211_recalc_ps(struct ieee80211_local *local) |
| 2878 | { |
| 2879 | struct ieee80211_sub_if_data *sdata, *found = NULL; |
| 2880 | int count = 0; |
| 2881 | int timeout; |
| 2882 | |
| 2883 | if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || |
| 2884 | ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { |
| 2885 | local->ps_sdata = NULL; |
| 2886 | return; |
| 2887 | } |
| 2888 | |
| 2889 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 2890 | if (!ieee80211_sdata_running(sdata)) |
| 2891 | continue; |
| 2892 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
| 2893 | /* If an AP vif is found, then disable PS |
| 2894 | * by setting the count to zero thereby setting |
| 2895 | * ps_sdata to NULL. |
| 2896 | */ |
| 2897 | count = 0; |
| 2898 | break; |
| 2899 | } |
| 2900 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| 2901 | continue; |
| 2902 | found = sdata; |
| 2903 | count++; |
| 2904 | } |
| 2905 | |
| 2906 | if (count == 1 && ieee80211_powersave_allowed(found)) { |
| 2907 | u8 dtimper = found->deflink.u.mgd.dtim_period; |
| 2908 | |
| 2909 | timeout = local->dynamic_ps_forced_timeout; |
| 2910 | if (timeout < 0) |
| 2911 | timeout = 100; |
| 2912 | local->hw.conf.dynamic_ps_timeout = timeout; |
| 2913 | |
| 2914 | /* If the TIM IE is invalid, pretend the value is 1 */ |
| 2915 | if (!dtimper) |
| 2916 | dtimper = 1; |
| 2917 | |
| 2918 | local->hw.conf.ps_dtim_period = dtimper; |
| 2919 | local->ps_sdata = found; |
| 2920 | } else { |
| 2921 | local->ps_sdata = NULL; |
| 2922 | } |
| 2923 | |
| 2924 | ieee80211_change_ps(local); |
| 2925 | } |
| 2926 | |
| 2927 | void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) |
| 2928 | { |
| 2929 | bool ps_allowed = ieee80211_powersave_allowed(sdata); |
| 2930 | |
| 2931 | if (sdata->vif.cfg.ps != ps_allowed) { |
| 2932 | sdata->vif.cfg.ps = ps_allowed; |
| 2933 | ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); |
| 2934 | } |
| 2935 | } |
| 2936 | |
| 2937 | void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, |
| 2938 | struct wiphy_work *work) |
| 2939 | { |
| 2940 | struct ieee80211_local *local = |
| 2941 | container_of(work, struct ieee80211_local, |
| 2942 | dynamic_ps_disable_work); |
| 2943 | |
| 2944 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
| 2945 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
| 2946 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
| 2947 | } |
| 2948 | |
| 2949 | ieee80211_wake_queues_by_reason(&local->hw, |
| 2950 | IEEE80211_MAX_QUEUE_MAP, |
| 2951 | IEEE80211_QUEUE_STOP_REASON_PS, |
| 2952 | false); |
| 2953 | } |
| 2954 | |
| 2955 | void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, |
| 2956 | struct wiphy_work *work) |
| 2957 | { |
| 2958 | struct ieee80211_local *local = |
| 2959 | container_of(work, struct ieee80211_local, |
| 2960 | dynamic_ps_enable_work); |
| 2961 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; |
| 2962 | struct ieee80211_if_managed *ifmgd; |
| 2963 | unsigned long flags; |
| 2964 | int q; |
| 2965 | |
| 2966 | /* can only happen when PS was just disabled anyway */ |
| 2967 | if (!sdata) |
| 2968 | return; |
| 2969 | |
| 2970 | ifmgd = &sdata->u.mgd; |
| 2971 | |
| 2972 | if (local->hw.conf.flags & IEEE80211_CONF_PS) |
| 2973 | return; |
| 2974 | |
| 2975 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
| 2976 | /* don't enter PS if TX frames are pending */ |
| 2977 | if (drv_tx_frames_pending(local)) { |
| 2978 | mod_timer(&local->dynamic_ps_timer, jiffies + |
| 2979 | msecs_to_jiffies( |
| 2980 | local->hw.conf.dynamic_ps_timeout)); |
| 2981 | return; |
| 2982 | } |
| 2983 | |
| 2984 | /* |
| 2985 | * transmission can be stopped by others which leads to |
| 2986 | * dynamic_ps_timer expiry. Postpone the ps timer if it |
| 2987 | * is not the actual idle state. |
| 2988 | */ |
| 2989 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| 2990 | for (q = 0; q < local->hw.queues; q++) { |
| 2991 | if (local->queue_stop_reasons[q]) { |
| 2992 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
| 2993 | flags); |
| 2994 | mod_timer(&local->dynamic_ps_timer, jiffies + |
| 2995 | msecs_to_jiffies( |
| 2996 | local->hw.conf.dynamic_ps_timeout)); |
| 2997 | return; |
| 2998 | } |
| 2999 | } |
| 3000 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 3001 | } |
| 3002 | |
| 3003 | if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && |
| 3004 | !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
| 3005 | if (drv_tx_frames_pending(local)) { |
| 3006 | mod_timer(&local->dynamic_ps_timer, jiffies + |
| 3007 | msecs_to_jiffies( |
| 3008 | local->hw.conf.dynamic_ps_timeout)); |
| 3009 | } else { |
| 3010 | ieee80211_send_nullfunc(local, sdata, true); |
| 3011 | /* Flush to get the tx status of nullfunc frame */ |
| 3012 | ieee80211_flush_queues(local, sdata, false); |
| 3013 | } |
| 3014 | } |
| 3015 | |
| 3016 | if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && |
| 3017 | ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || |
| 3018 | (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
| 3019 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
| 3020 | local->hw.conf.flags |= IEEE80211_CONF_PS; |
| 3021 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
| 3022 | } |
| 3023 | } |
| 3024 | |
| 3025 | void ieee80211_dynamic_ps_timer(struct timer_list *t) |
| 3026 | { |
| 3027 | struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); |
| 3028 | |
| 3029 | wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); |
| 3030 | } |
| 3031 | |
| 3032 | void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) |
| 3033 | { |
| 3034 | struct ieee80211_link_data *link = |
| 3035 | container_of(work, struct ieee80211_link_data, |
| 3036 | dfs_cac_timer_work.work); |
| 3037 | struct cfg80211_chan_def chandef = link->conf->chanreq.oper; |
| 3038 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 3039 | |
| 3040 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 3041 | |
| 3042 | if (sdata->wdev.links[link->link_id].cac_started) { |
| 3043 | ieee80211_link_release_channel(link); |
| 3044 | cfg80211_cac_event(sdata->dev, &chandef, |
| 3045 | NL80211_RADAR_CAC_FINISHED, |
| 3046 | GFP_KERNEL, link->link_id); |
| 3047 | } |
| 3048 | } |
| 3049 | |
| 3050 | static bool |
| 3051 | __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) |
| 3052 | { |
| 3053 | struct ieee80211_local *local = sdata->local; |
| 3054 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 3055 | bool ret = false; |
| 3056 | int ac; |
| 3057 | |
| 3058 | if (local->hw.queues < IEEE80211_NUM_ACS) |
| 3059 | return false; |
| 3060 | |
| 3061 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
| 3062 | struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; |
| 3063 | int non_acm_ac; |
| 3064 | unsigned long now = jiffies; |
| 3065 | |
| 3066 | if (tx_tspec->action == TX_TSPEC_ACTION_NONE && |
| 3067 | tx_tspec->admitted_time && |
| 3068 | time_after(now, tx_tspec->time_slice_start + HZ)) { |
| 3069 | tx_tspec->consumed_tx_time = 0; |
| 3070 | tx_tspec->time_slice_start = now; |
| 3071 | |
| 3072 | if (tx_tspec->downgraded) |
| 3073 | tx_tspec->action = |
| 3074 | TX_TSPEC_ACTION_STOP_DOWNGRADE; |
| 3075 | } |
| 3076 | |
| 3077 | switch (tx_tspec->action) { |
| 3078 | case TX_TSPEC_ACTION_STOP_DOWNGRADE: |
| 3079 | /* take the original parameters */ |
| 3080 | if (drv_conf_tx(local, &sdata->deflink, ac, |
| 3081 | &sdata->deflink.tx_conf[ac])) |
| 3082 | link_err(&sdata->deflink, |
| 3083 | "failed to set TX queue parameters for queue %d\n", |
| 3084 | ac); |
| 3085 | tx_tspec->action = TX_TSPEC_ACTION_NONE; |
| 3086 | tx_tspec->downgraded = false; |
| 3087 | ret = true; |
| 3088 | break; |
| 3089 | case TX_TSPEC_ACTION_DOWNGRADE: |
| 3090 | if (time_after(now, tx_tspec->time_slice_start + HZ)) { |
| 3091 | tx_tspec->action = TX_TSPEC_ACTION_NONE; |
| 3092 | ret = true; |
| 3093 | break; |
| 3094 | } |
| 3095 | /* downgrade next lower non-ACM AC */ |
| 3096 | for (non_acm_ac = ac + 1; |
| 3097 | non_acm_ac < IEEE80211_NUM_ACS; |
| 3098 | non_acm_ac++) |
| 3099 | if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) |
| 3100 | break; |
| 3101 | /* Usually the loop will result in using BK even if it |
| 3102 | * requires admission control, but such a configuration |
| 3103 | * makes no sense and we have to transmit somehow - the |
| 3104 | * AC selection does the same thing. |
| 3105 | * If we started out trying to downgrade from BK, then |
| 3106 | * the extra condition here might be needed. |
| 3107 | */ |
| 3108 | if (non_acm_ac >= IEEE80211_NUM_ACS) |
| 3109 | non_acm_ac = IEEE80211_AC_BK; |
| 3110 | if (drv_conf_tx(local, &sdata->deflink, ac, |
| 3111 | &sdata->deflink.tx_conf[non_acm_ac])) |
| 3112 | link_err(&sdata->deflink, |
| 3113 | "failed to set TX queue parameters for queue %d\n", |
| 3114 | ac); |
| 3115 | tx_tspec->action = TX_TSPEC_ACTION_NONE; |
| 3116 | ret = true; |
| 3117 | wiphy_delayed_work_queue(local->hw.wiphy, |
| 3118 | &ifmgd->tx_tspec_wk, |
| 3119 | tx_tspec->time_slice_start + |
| 3120 | HZ - now + 1); |
| 3121 | break; |
| 3122 | case TX_TSPEC_ACTION_NONE: |
| 3123 | /* nothing now */ |
| 3124 | break; |
| 3125 | } |
| 3126 | } |
| 3127 | |
| 3128 | return ret; |
| 3129 | } |
| 3130 | |
| 3131 | void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) |
| 3132 | { |
| 3133 | if (__ieee80211_sta_handle_tspec_ac_params(sdata)) |
| 3134 | ieee80211_link_info_change_notify(sdata, &sdata->deflink, |
| 3135 | BSS_CHANGED_QOS); |
| 3136 | } |
| 3137 | |
| 3138 | static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, |
| 3139 | struct wiphy_work *work) |
| 3140 | { |
| 3141 | struct ieee80211_sub_if_data *sdata; |
| 3142 | |
| 3143 | sdata = container_of(work, struct ieee80211_sub_if_data, |
| 3144 | u.mgd.tx_tspec_wk.work); |
| 3145 | ieee80211_sta_handle_tspec_ac_params(sdata); |
| 3146 | } |
| 3147 | |
| 3148 | void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) |
| 3149 | { |
| 3150 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 3151 | struct ieee80211_local *local = sdata->local; |
| 3152 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 3153 | struct ieee80211_tx_queue_params *params = link->tx_conf; |
| 3154 | u8 ac; |
| 3155 | |
| 3156 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
| 3157 | mlme_dbg(sdata, |
| 3158 | "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", |
| 3159 | ac, params[ac].acm, |
| 3160 | params[ac].aifs, params[ac].cw_min, params[ac].cw_max, |
| 3161 | params[ac].txop, params[ac].uapsd, |
| 3162 | ifmgd->tx_tspec[ac].downgraded); |
| 3163 | if (!ifmgd->tx_tspec[ac].downgraded && |
| 3164 | drv_conf_tx(local, link, ac, ¶ms[ac])) |
| 3165 | link_err(link, |
| 3166 | "failed to set TX queue parameters for AC %d\n", |
| 3167 | ac); |
| 3168 | } |
| 3169 | } |
| 3170 | |
| 3171 | /* MLME */ |
| 3172 | static bool |
| 3173 | ieee80211_sta_wmm_params(struct ieee80211_local *local, |
| 3174 | struct ieee80211_link_data *link, |
| 3175 | const u8 *wmm_param, size_t wmm_param_len, |
| 3176 | const struct ieee80211_mu_edca_param_set *mu_edca) |
| 3177 | { |
| 3178 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 3179 | struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; |
| 3180 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 3181 | size_t left; |
| 3182 | int count, mu_edca_count, ac; |
| 3183 | const u8 *pos; |
| 3184 | u8 uapsd_queues = 0; |
| 3185 | |
| 3186 | if (!local->ops->conf_tx) |
| 3187 | return false; |
| 3188 | |
| 3189 | if (local->hw.queues < IEEE80211_NUM_ACS) |
| 3190 | return false; |
| 3191 | |
| 3192 | if (!wmm_param) |
| 3193 | return false; |
| 3194 | |
| 3195 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
| 3196 | return false; |
| 3197 | |
| 3198 | if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) |
| 3199 | uapsd_queues = ifmgd->uapsd_queues; |
| 3200 | |
| 3201 | count = wmm_param[6] & 0x0f; |
| 3202 | /* -1 is the initial value of ifmgd->mu_edca_last_param_set. |
| 3203 | * if mu_edca was preset before and now it disappeared tell |
| 3204 | * the driver about it. |
| 3205 | */ |
| 3206 | mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; |
| 3207 | if (count == link->u.mgd.wmm_last_param_set && |
| 3208 | mu_edca_count == link->u.mgd.mu_edca_last_param_set) |
| 3209 | return false; |
| 3210 | link->u.mgd.wmm_last_param_set = count; |
| 3211 | link->u.mgd.mu_edca_last_param_set = mu_edca_count; |
| 3212 | |
| 3213 | pos = wmm_param + 8; |
| 3214 | left = wmm_param_len - 8; |
| 3215 | |
| 3216 | memset(¶ms, 0, sizeof(params)); |
| 3217 | |
| 3218 | sdata->wmm_acm = 0; |
| 3219 | for (; left >= 4; left -= 4, pos += 4) { |
| 3220 | int aci = (pos[0] >> 5) & 0x03; |
| 3221 | int acm = (pos[0] >> 4) & 0x01; |
| 3222 | bool uapsd = false; |
| 3223 | |
| 3224 | switch (aci) { |
| 3225 | case 1: /* AC_BK */ |
| 3226 | ac = IEEE80211_AC_BK; |
| 3227 | if (acm) |
| 3228 | sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
| 3229 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) |
| 3230 | uapsd = true; |
| 3231 | params[ac].mu_edca = !!mu_edca; |
| 3232 | if (mu_edca) |
| 3233 | params[ac].mu_edca_param_rec = mu_edca->ac_bk; |
| 3234 | break; |
| 3235 | case 2: /* AC_VI */ |
| 3236 | ac = IEEE80211_AC_VI; |
| 3237 | if (acm) |
| 3238 | sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
| 3239 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) |
| 3240 | uapsd = true; |
| 3241 | params[ac].mu_edca = !!mu_edca; |
| 3242 | if (mu_edca) |
| 3243 | params[ac].mu_edca_param_rec = mu_edca->ac_vi; |
| 3244 | break; |
| 3245 | case 3: /* AC_VO */ |
| 3246 | ac = IEEE80211_AC_VO; |
| 3247 | if (acm) |
| 3248 | sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
| 3249 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) |
| 3250 | uapsd = true; |
| 3251 | params[ac].mu_edca = !!mu_edca; |
| 3252 | if (mu_edca) |
| 3253 | params[ac].mu_edca_param_rec = mu_edca->ac_vo; |
| 3254 | break; |
| 3255 | case 0: /* AC_BE */ |
| 3256 | default: |
| 3257 | ac = IEEE80211_AC_BE; |
| 3258 | if (acm) |
| 3259 | sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
| 3260 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) |
| 3261 | uapsd = true; |
| 3262 | params[ac].mu_edca = !!mu_edca; |
| 3263 | if (mu_edca) |
| 3264 | params[ac].mu_edca_param_rec = mu_edca->ac_be; |
| 3265 | break; |
| 3266 | } |
| 3267 | |
| 3268 | params[ac].aifs = pos[0] & 0x0f; |
| 3269 | |
| 3270 | if (params[ac].aifs < 2) { |
| 3271 | link_info(link, |
| 3272 | "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", |
| 3273 | params[ac].aifs, aci); |
| 3274 | params[ac].aifs = 2; |
| 3275 | } |
| 3276 | params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); |
| 3277 | params[ac].cw_min = ecw2cw(pos[1] & 0x0f); |
| 3278 | params[ac].txop = get_unaligned_le16(pos + 2); |
| 3279 | params[ac].acm = acm; |
| 3280 | params[ac].uapsd = uapsd; |
| 3281 | |
| 3282 | if (params[ac].cw_min == 0 || |
| 3283 | params[ac].cw_min > params[ac].cw_max) { |
| 3284 | link_info(link, |
| 3285 | "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", |
| 3286 | params[ac].cw_min, params[ac].cw_max, aci); |
| 3287 | return false; |
| 3288 | } |
| 3289 | ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); |
| 3290 | } |
| 3291 | |
| 3292 | /* WMM specification requires all 4 ACIs. */ |
| 3293 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
| 3294 | if (params[ac].cw_min == 0) { |
| 3295 | link_info(link, |
| 3296 | "AP has invalid WMM params (missing AC %d), using defaults\n", |
| 3297 | ac); |
| 3298 | return false; |
| 3299 | } |
| 3300 | } |
| 3301 | |
| 3302 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) |
| 3303 | link->tx_conf[ac] = params[ac]; |
| 3304 | |
| 3305 | ieee80211_mgd_set_link_qos_params(link); |
| 3306 | |
| 3307 | /* enable WMM or activate new settings */ |
| 3308 | link->conf->qos = true; |
| 3309 | return true; |
| 3310 | } |
| 3311 | |
| 3312 | static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) |
| 3313 | { |
| 3314 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 3315 | |
| 3316 | sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; |
| 3317 | ieee80211_run_deferred_scan(sdata->local); |
| 3318 | } |
| 3319 | |
| 3320 | static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) |
| 3321 | { |
| 3322 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 3323 | |
| 3324 | __ieee80211_stop_poll(sdata); |
| 3325 | } |
| 3326 | |
| 3327 | static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, |
| 3328 | u16 capab, bool erp_valid, u8 erp) |
| 3329 | { |
| 3330 | struct ieee80211_bss_conf *bss_conf = link->conf; |
| 3331 | struct ieee80211_supported_band *sband; |
| 3332 | u64 changed = 0; |
| 3333 | bool use_protection; |
| 3334 | bool use_short_preamble; |
| 3335 | bool use_short_slot; |
| 3336 | |
| 3337 | sband = ieee80211_get_link_sband(link); |
| 3338 | if (!sband) |
| 3339 | return changed; |
| 3340 | |
| 3341 | if (erp_valid) { |
| 3342 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; |
| 3343 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; |
| 3344 | } else { |
| 3345 | use_protection = false; |
| 3346 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); |
| 3347 | } |
| 3348 | |
| 3349 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); |
| 3350 | if (sband->band == NL80211_BAND_5GHZ || |
| 3351 | sband->band == NL80211_BAND_6GHZ) |
| 3352 | use_short_slot = true; |
| 3353 | |
| 3354 | if (use_protection != bss_conf->use_cts_prot) { |
| 3355 | bss_conf->use_cts_prot = use_protection; |
| 3356 | changed |= BSS_CHANGED_ERP_CTS_PROT; |
| 3357 | } |
| 3358 | |
| 3359 | if (use_short_preamble != bss_conf->use_short_preamble) { |
| 3360 | bss_conf->use_short_preamble = use_short_preamble; |
| 3361 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
| 3362 | } |
| 3363 | |
| 3364 | if (use_short_slot != bss_conf->use_short_slot) { |
| 3365 | bss_conf->use_short_slot = use_short_slot; |
| 3366 | changed |= BSS_CHANGED_ERP_SLOT; |
| 3367 | } |
| 3368 | |
| 3369 | return changed; |
| 3370 | } |
| 3371 | |
| 3372 | static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, |
| 3373 | struct cfg80211_bss *cbss) |
| 3374 | { |
| 3375 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 3376 | struct ieee80211_bss_conf *bss_conf = link->conf; |
| 3377 | struct ieee80211_bss *bss = (void *)cbss->priv; |
| 3378 | u64 changed = BSS_CHANGED_QOS; |
| 3379 | |
| 3380 | /* not really used in MLO */ |
| 3381 | sdata->u.mgd.beacon_timeout = |
| 3382 | usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * |
| 3383 | bss_conf->beacon_int)); |
| 3384 | |
| 3385 | changed |= ieee80211_handle_bss_capability(link, |
| 3386 | bss_conf->assoc_capability, |
| 3387 | bss->has_erp_value, |
| 3388 | bss->erp_value); |
| 3389 | |
| 3390 | ieee80211_check_rate_mask(link); |
| 3391 | |
| 3392 | link->conf->bss = cbss; |
| 3393 | memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); |
| 3394 | |
| 3395 | if (sdata->vif.p2p || |
| 3396 | sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { |
| 3397 | const struct cfg80211_bss_ies *ies; |
| 3398 | |
| 3399 | rcu_read_lock(); |
| 3400 | ies = rcu_dereference(cbss->ies); |
| 3401 | if (ies) { |
| 3402 | int ret; |
| 3403 | |
| 3404 | ret = cfg80211_get_p2p_attr( |
| 3405 | ies->data, ies->len, |
| 3406 | IEEE80211_P2P_ATTR_ABSENCE_NOTICE, |
| 3407 | (u8 *) &bss_conf->p2p_noa_attr, |
| 3408 | sizeof(bss_conf->p2p_noa_attr)); |
| 3409 | if (ret >= 2) { |
| 3410 | link->u.mgd.p2p_noa_index = |
| 3411 | bss_conf->p2p_noa_attr.index; |
| 3412 | changed |= BSS_CHANGED_P2P_PS; |
| 3413 | } |
| 3414 | } |
| 3415 | rcu_read_unlock(); |
| 3416 | } |
| 3417 | |
| 3418 | if (link->u.mgd.have_beacon) { |
| 3419 | bss_conf->beacon_rate = bss->beacon_rate; |
| 3420 | changed |= BSS_CHANGED_BEACON_INFO; |
| 3421 | } else { |
| 3422 | bss_conf->beacon_rate = NULL; |
| 3423 | } |
| 3424 | |
| 3425 | /* Tell the driver to monitor connection quality (if supported) */ |
| 3426 | if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && |
| 3427 | bss_conf->cqm_rssi_thold) |
| 3428 | changed |= BSS_CHANGED_CQM; |
| 3429 | |
| 3430 | return changed; |
| 3431 | } |
| 3432 | |
| 3433 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
| 3434 | struct ieee80211_mgd_assoc_data *assoc_data, |
| 3435 | u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) |
| 3436 | { |
| 3437 | struct ieee80211_local *local = sdata->local; |
| 3438 | struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; |
| 3439 | u64 vif_changed = BSS_CHANGED_ASSOC; |
| 3440 | unsigned int link_id; |
| 3441 | |
| 3442 | lockdep_assert_wiphy(local->hw.wiphy); |
| 3443 | |
| 3444 | sdata->u.mgd.associated = true; |
| 3445 | |
| 3446 | for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { |
| 3447 | struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; |
| 3448 | struct ieee80211_link_data *link; |
| 3449 | |
| 3450 | if (!cbss || |
| 3451 | assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) |
| 3452 | continue; |
| 3453 | |
| 3454 | if (ieee80211_vif_is_mld(&sdata->vif) && |
| 3455 | !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) |
| 3456 | continue; |
| 3457 | |
| 3458 | link = sdata_dereference(sdata->link[link_id], sdata); |
| 3459 | if (WARN_ON(!link)) |
| 3460 | return; |
| 3461 | |
| 3462 | changed[link_id] |= ieee80211_link_set_associated(link, cbss); |
| 3463 | } |
| 3464 | |
| 3465 | /* just to be sure */ |
| 3466 | ieee80211_stop_poll(sdata); |
| 3467 | |
| 3468 | ieee80211_led_assoc(local, 1); |
| 3469 | |
| 3470 | vif_cfg->assoc = 1; |
| 3471 | |
| 3472 | /* Enable ARP filtering */ |
| 3473 | if (vif_cfg->arp_addr_cnt) |
| 3474 | vif_changed |= BSS_CHANGED_ARP_FILTER; |
| 3475 | |
| 3476 | if (ieee80211_vif_is_mld(&sdata->vif)) { |
| 3477 | for (link_id = 0; |
| 3478 | link_id < IEEE80211_MLD_MAX_NUM_LINKS; |
| 3479 | link_id++) { |
| 3480 | struct ieee80211_link_data *link; |
| 3481 | struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; |
| 3482 | |
| 3483 | if (!cbss || |
| 3484 | !(BIT(link_id) & |
| 3485 | ieee80211_vif_usable_links(&sdata->vif)) || |
| 3486 | assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) |
| 3487 | continue; |
| 3488 | |
| 3489 | link = sdata_dereference(sdata->link[link_id], sdata); |
| 3490 | if (WARN_ON(!link)) |
| 3491 | return; |
| 3492 | |
| 3493 | ieee80211_link_info_change_notify(sdata, link, |
| 3494 | changed[link_id]); |
| 3495 | |
| 3496 | ieee80211_recalc_smps(sdata, link); |
| 3497 | } |
| 3498 | |
| 3499 | ieee80211_vif_cfg_change_notify(sdata, vif_changed); |
| 3500 | } else { |
| 3501 | ieee80211_bss_info_change_notify(sdata, |
| 3502 | vif_changed | changed[0]); |
| 3503 | } |
| 3504 | |
| 3505 | ieee80211_recalc_ps(local); |
| 3506 | |
| 3507 | /* leave this here to not change ordering in non-MLO cases */ |
| 3508 | if (!ieee80211_vif_is_mld(&sdata->vif)) |
| 3509 | ieee80211_recalc_smps(sdata, &sdata->deflink); |
| 3510 | ieee80211_recalc_ps_vif(sdata); |
| 3511 | |
| 3512 | netif_carrier_on(sdata->dev); |
| 3513 | } |
| 3514 | |
| 3515 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
| 3516 | u16 stype, u16 reason, bool tx, |
| 3517 | u8 *frame_buf) |
| 3518 | { |
| 3519 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 3520 | struct ieee80211_local *local = sdata->local; |
| 3521 | unsigned int link_id; |
| 3522 | u64 changed = 0; |
| 3523 | struct ieee80211_prep_tx_info info = { |
| 3524 | .subtype = stype, |
| 3525 | .was_assoc = true, |
| 3526 | .link_id = ffs(sdata->vif.active_links) - 1, |
| 3527 | }; |
| 3528 | |
| 3529 | lockdep_assert_wiphy(local->hw.wiphy); |
| 3530 | |
| 3531 | if (WARN_ON_ONCE(tx && !frame_buf)) |
| 3532 | return; |
| 3533 | |
| 3534 | if (WARN_ON(!ifmgd->associated)) |
| 3535 | return; |
| 3536 | |
| 3537 | ieee80211_stop_poll(sdata); |
| 3538 | |
| 3539 | ifmgd->associated = false; |
| 3540 | |
| 3541 | /* other links will be destroyed */ |
| 3542 | sdata->deflink.conf->bss = NULL; |
| 3543 | sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; |
| 3544 | |
| 3545 | netif_carrier_off(sdata->dev); |
| 3546 | |
| 3547 | /* |
| 3548 | * if we want to get out of ps before disassoc (why?) we have |
| 3549 | * to do it before sending disassoc, as otherwise the null-packet |
| 3550 | * won't be valid. |
| 3551 | */ |
| 3552 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
| 3553 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
| 3554 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
| 3555 | } |
| 3556 | local->ps_sdata = NULL; |
| 3557 | |
| 3558 | /* disable per-vif ps */ |
| 3559 | ieee80211_recalc_ps_vif(sdata); |
| 3560 | |
| 3561 | /* make sure ongoing transmission finishes */ |
| 3562 | synchronize_net(); |
| 3563 | |
| 3564 | /* |
| 3565 | * drop any frame before deauth/disassoc, this can be data or |
| 3566 | * management frame. Since we are disconnecting, we should not |
| 3567 | * insist sending these frames which can take time and delay |
| 3568 | * the disconnection and possible the roaming. |
| 3569 | */ |
| 3570 | if (tx) |
| 3571 | ieee80211_flush_queues(local, sdata, true); |
| 3572 | |
| 3573 | /* deauthenticate/disassociate now */ |
| 3574 | if (tx || frame_buf) { |
| 3575 | drv_mgd_prepare_tx(sdata->local, sdata, &info); |
| 3576 | |
| 3577 | ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, |
| 3578 | sdata->vif.cfg.ap_addr, stype, |
| 3579 | reason, tx, frame_buf); |
| 3580 | } |
| 3581 | |
| 3582 | /* flush out frame - make sure the deauth was actually sent */ |
| 3583 | if (tx) |
| 3584 | ieee80211_flush_queues(local, sdata, false); |
| 3585 | |
| 3586 | drv_mgd_complete_tx(sdata->local, sdata, &info); |
| 3587 | |
| 3588 | /* clear AP addr only after building the needed mgmt frames */ |
| 3589 | eth_zero_addr(sdata->deflink.u.mgd.bssid); |
| 3590 | eth_zero_addr(sdata->vif.cfg.ap_addr); |
| 3591 | |
| 3592 | sdata->vif.cfg.ssid_len = 0; |
| 3593 | |
| 3594 | /* remove AP and TDLS peers */ |
| 3595 | sta_info_flush(sdata, -1); |
| 3596 | |
| 3597 | /* finally reset all BSS / config parameters */ |
| 3598 | if (!ieee80211_vif_is_mld(&sdata->vif)) |
| 3599 | changed |= ieee80211_reset_erp_info(sdata); |
| 3600 | |
| 3601 | ieee80211_led_assoc(local, 0); |
| 3602 | changed |= BSS_CHANGED_ASSOC; |
| 3603 | sdata->vif.cfg.assoc = false; |
| 3604 | |
| 3605 | sdata->deflink.u.mgd.p2p_noa_index = -1; |
| 3606 | memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, |
| 3607 | sizeof(sdata->vif.bss_conf.p2p_noa_attr)); |
| 3608 | |
| 3609 | /* on the next assoc, re-program HT/VHT parameters */ |
| 3610 | memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); |
| 3611 | memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); |
| 3612 | memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); |
| 3613 | memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); |
| 3614 | |
| 3615 | /* |
| 3616 | * reset MU-MIMO ownership and group data in default link, |
| 3617 | * if used, other links are destroyed |
| 3618 | */ |
| 3619 | memset(sdata->vif.bss_conf.mu_group.membership, 0, |
| 3620 | sizeof(sdata->vif.bss_conf.mu_group.membership)); |
| 3621 | memset(sdata->vif.bss_conf.mu_group.position, 0, |
| 3622 | sizeof(sdata->vif.bss_conf.mu_group.position)); |
| 3623 | if (!ieee80211_vif_is_mld(&sdata->vif)) |
| 3624 | changed |= BSS_CHANGED_MU_GROUPS; |
| 3625 | sdata->vif.bss_conf.mu_mimo_owner = false; |
| 3626 | |
| 3627 | sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; |
| 3628 | |
| 3629 | del_timer_sync(&local->dynamic_ps_timer); |
| 3630 | wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); |
| 3631 | |
| 3632 | /* Disable ARP filtering */ |
| 3633 | if (sdata->vif.cfg.arp_addr_cnt) |
| 3634 | changed |= BSS_CHANGED_ARP_FILTER; |
| 3635 | |
| 3636 | sdata->vif.bss_conf.qos = false; |
| 3637 | if (!ieee80211_vif_is_mld(&sdata->vif)) { |
| 3638 | changed |= BSS_CHANGED_QOS; |
| 3639 | /* The BSSID (not really interesting) and HT changed */ |
| 3640 | changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; |
| 3641 | ieee80211_bss_info_change_notify(sdata, changed); |
| 3642 | } else { |
| 3643 | ieee80211_vif_cfg_change_notify(sdata, changed); |
| 3644 | } |
| 3645 | |
| 3646 | /* disassociated - set to defaults now */ |
| 3647 | ieee80211_set_wmm_default(&sdata->deflink, false, false); |
| 3648 | |
| 3649 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
| 3650 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); |
| 3651 | del_timer_sync(&sdata->u.mgd.timer); |
| 3652 | |
| 3653 | sdata->vif.bss_conf.dtim_period = 0; |
| 3654 | sdata->vif.bss_conf.beacon_rate = NULL; |
| 3655 | |
| 3656 | sdata->deflink.u.mgd.have_beacon = false; |
| 3657 | sdata->deflink.u.mgd.tracking_signal_avg = false; |
| 3658 | sdata->deflink.u.mgd.disable_wmm_tracking = false; |
| 3659 | |
| 3660 | ifmgd->flags = 0; |
| 3661 | |
| 3662 | for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { |
| 3663 | struct ieee80211_link_data *link; |
| 3664 | |
| 3665 | link = sdata_dereference(sdata->link[link_id], sdata); |
| 3666 | if (!link) |
| 3667 | continue; |
| 3668 | ieee80211_link_release_channel(link); |
| 3669 | } |
| 3670 | |
| 3671 | sdata->vif.bss_conf.csa_active = false; |
| 3672 | sdata->deflink.u.mgd.csa.blocked_tx = false; |
| 3673 | sdata->deflink.u.mgd.csa.waiting_bcn = false; |
| 3674 | sdata->deflink.u.mgd.csa.ignored_same_chan = false; |
| 3675 | ieee80211_vif_unblock_queues_csa(sdata); |
| 3676 | |
| 3677 | /* existing TX TSPEC sessions no longer exist */ |
| 3678 | memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); |
| 3679 | wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); |
| 3680 | |
| 3681 | sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; |
| 3682 | sdata->vif.bss_conf.pwr_reduction = 0; |
| 3683 | ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); |
| 3684 | |
| 3685 | sdata->vif.cfg.eml_cap = 0; |
| 3686 | sdata->vif.cfg.eml_med_sync_delay = 0; |
| 3687 | sdata->vif.cfg.mld_capa_op = 0; |
| 3688 | |
| 3689 | memset(&sdata->u.mgd.ttlm_info, 0, |
| 3690 | sizeof(sdata->u.mgd.ttlm_info)); |
| 3691 | wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); |
| 3692 | |
| 3693 | memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); |
| 3694 | wiphy_delayed_work_cancel(sdata->local->hw.wiphy, |
| 3695 | &ifmgd->neg_ttlm_timeout_work); |
| 3696 | |
| 3697 | sdata->u.mgd.removed_links = 0; |
| 3698 | wiphy_delayed_work_cancel(sdata->local->hw.wiphy, |
| 3699 | &sdata->u.mgd.ml_reconf_work); |
| 3700 | |
| 3701 | wiphy_work_cancel(sdata->local->hw.wiphy, |
| 3702 | &ifmgd->teardown_ttlm_work); |
| 3703 | |
| 3704 | ieee80211_vif_set_links(sdata, 0, 0); |
| 3705 | |
| 3706 | ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; |
| 3707 | } |
| 3708 | |
| 3709 | static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) |
| 3710 | { |
| 3711 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 3712 | struct ieee80211_local *local = sdata->local; |
| 3713 | |
| 3714 | lockdep_assert_wiphy(local->hw.wiphy); |
| 3715 | |
| 3716 | if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) |
| 3717 | return; |
| 3718 | |
| 3719 | __ieee80211_stop_poll(sdata); |
| 3720 | |
| 3721 | ieee80211_recalc_ps(local); |
| 3722 | |
| 3723 | if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) |
| 3724 | return; |
| 3725 | |
| 3726 | /* |
| 3727 | * We've received a probe response, but are not sure whether |
| 3728 | * we have or will be receiving any beacons or data, so let's |
| 3729 | * schedule the timers again, just in case. |
| 3730 | */ |
| 3731 | ieee80211_sta_reset_beacon_monitor(sdata); |
| 3732 | |
| 3733 | mod_timer(&ifmgd->conn_mon_timer, |
| 3734 | round_jiffies_up(jiffies + |
| 3735 | IEEE80211_CONNECTION_IDLE_TIME)); |
| 3736 | } |
| 3737 | |
| 3738 | static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, |
| 3739 | struct ieee80211_hdr *hdr, |
| 3740 | u16 tx_time) |
| 3741 | { |
| 3742 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 3743 | u16 tid; |
| 3744 | int ac; |
| 3745 | struct ieee80211_sta_tx_tspec *tx_tspec; |
| 3746 | unsigned long now = jiffies; |
| 3747 | |
| 3748 | if (!ieee80211_is_data_qos(hdr->frame_control)) |
| 3749 | return; |
| 3750 | |
| 3751 | tid = ieee80211_get_tid(hdr); |
| 3752 | ac = ieee80211_ac_from_tid(tid); |
| 3753 | tx_tspec = &ifmgd->tx_tspec[ac]; |
| 3754 | |
| 3755 | if (likely(!tx_tspec->admitted_time)) |
| 3756 | return; |
| 3757 | |
| 3758 | if (time_after(now, tx_tspec->time_slice_start + HZ)) { |
| 3759 | tx_tspec->consumed_tx_time = 0; |
| 3760 | tx_tspec->time_slice_start = now; |
| 3761 | |
| 3762 | if (tx_tspec->downgraded) { |
| 3763 | tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; |
| 3764 | wiphy_delayed_work_queue(sdata->local->hw.wiphy, |
| 3765 | &ifmgd->tx_tspec_wk, 0); |
| 3766 | } |
| 3767 | } |
| 3768 | |
| 3769 | if (tx_tspec->downgraded) |
| 3770 | return; |
| 3771 | |
| 3772 | tx_tspec->consumed_tx_time += tx_time; |
| 3773 | |
| 3774 | if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { |
| 3775 | tx_tspec->downgraded = true; |
| 3776 | tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; |
| 3777 | wiphy_delayed_work_queue(sdata->local->hw.wiphy, |
| 3778 | &ifmgd->tx_tspec_wk, 0); |
| 3779 | } |
| 3780 | } |
| 3781 | |
| 3782 | void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, |
| 3783 | struct ieee80211_hdr *hdr, bool ack, u16 tx_time) |
| 3784 | { |
| 3785 | ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); |
| 3786 | |
| 3787 | if (!ieee80211_is_any_nullfunc(hdr->frame_control) || |
| 3788 | !sdata->u.mgd.probe_send_count) |
| 3789 | return; |
| 3790 | |
| 3791 | if (ack) |
| 3792 | sdata->u.mgd.probe_send_count = 0; |
| 3793 | else |
| 3794 | sdata->u.mgd.nullfunc_failed = true; |
| 3795 | wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); |
| 3796 | } |
| 3797 | |
| 3798 | static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, |
| 3799 | const u8 *src, const u8 *dst, |
| 3800 | const u8 *ssid, size_t ssid_len, |
| 3801 | struct ieee80211_channel *channel) |
| 3802 | { |
| 3803 | struct sk_buff *skb; |
| 3804 | |
| 3805 | skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, |
| 3806 | ssid, ssid_len, NULL, 0, |
| 3807 | IEEE80211_PROBE_FLAG_DIRECTED); |
| 3808 | if (skb) |
| 3809 | ieee80211_tx_skb(sdata, skb); |
| 3810 | } |
| 3811 | |
| 3812 | static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
| 3813 | { |
| 3814 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 3815 | u8 *dst = sdata->vif.cfg.ap_addr; |
| 3816 | u8 unicast_limit = max(1, max_probe_tries - 3); |
| 3817 | struct sta_info *sta; |
| 3818 | |
| 3819 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 3820 | |
| 3821 | if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) |
| 3822 | return; |
| 3823 | |
| 3824 | /* |
| 3825 | * Try sending broadcast probe requests for the last three |
| 3826 | * probe requests after the first ones failed since some |
| 3827 | * buggy APs only support broadcast probe requests. |
| 3828 | */ |
| 3829 | if (ifmgd->probe_send_count >= unicast_limit) |
| 3830 | dst = NULL; |
| 3831 | |
| 3832 | /* |
| 3833 | * When the hardware reports an accurate Tx ACK status, it's |
| 3834 | * better to send a nullfunc frame instead of a probe request, |
| 3835 | * as it will kick us off the AP quickly if we aren't associated |
| 3836 | * anymore. The timeout will be reset if the frame is ACKed by |
| 3837 | * the AP. |
| 3838 | */ |
| 3839 | ifmgd->probe_send_count++; |
| 3840 | |
| 3841 | if (dst) { |
| 3842 | sta = sta_info_get(sdata, dst); |
| 3843 | if (!WARN_ON(!sta)) |
| 3844 | ieee80211_check_fast_rx(sta); |
| 3845 | } |
| 3846 | |
| 3847 | if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { |
| 3848 | ifmgd->nullfunc_failed = false; |
| 3849 | ieee80211_send_nullfunc(sdata->local, sdata, false); |
| 3850 | } else { |
| 3851 | ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, |
| 3852 | sdata->vif.cfg.ssid, |
| 3853 | sdata->vif.cfg.ssid_len, |
| 3854 | sdata->deflink.conf->bss->channel); |
| 3855 | } |
| 3856 | |
| 3857 | ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); |
| 3858 | run_again(sdata, ifmgd->probe_timeout); |
| 3859 | } |
| 3860 | |
| 3861 | static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
| 3862 | bool beacon) |
| 3863 | { |
| 3864 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 3865 | bool already = false; |
| 3866 | |
| 3867 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 3868 | |
| 3869 | if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) |
| 3870 | return; |
| 3871 | |
| 3872 | if (!ieee80211_sdata_running(sdata)) |
| 3873 | return; |
| 3874 | |
| 3875 | if (!ifmgd->associated) |
| 3876 | return; |
| 3877 | |
| 3878 | if (sdata->local->tmp_channel || sdata->local->scanning) |
| 3879 | return; |
| 3880 | |
| 3881 | if (sdata->local->suspending) { |
| 3882 | /* reschedule after resume */ |
| 3883 | ieee80211_reset_ap_probe(sdata); |
| 3884 | return; |
| 3885 | } |
| 3886 | |
| 3887 | if (beacon) { |
| 3888 | mlme_dbg_ratelimited(sdata, |
| 3889 | "detected beacon loss from AP (missed %d beacons) - probing\n", |
| 3890 | beacon_loss_count); |
| 3891 | |
| 3892 | ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); |
| 3893 | } |
| 3894 | |
| 3895 | /* |
| 3896 | * The driver/our work has already reported this event or the |
| 3897 | * connection monitoring has kicked in and we have already sent |
| 3898 | * a probe request. Or maybe the AP died and the driver keeps |
| 3899 | * reporting until we disassociate... |
| 3900 | * |
| 3901 | * In either case we have to ignore the current call to this |
| 3902 | * function (except for setting the correct probe reason bit) |
| 3903 | * because otherwise we would reset the timer every time and |
| 3904 | * never check whether we received a probe response! |
| 3905 | */ |
| 3906 | if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) |
| 3907 | already = true; |
| 3908 | |
| 3909 | ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; |
| 3910 | |
| 3911 | if (already) |
| 3912 | return; |
| 3913 | |
| 3914 | ieee80211_recalc_ps(sdata->local); |
| 3915 | |
| 3916 | ifmgd->probe_send_count = 0; |
| 3917 | ieee80211_mgd_probe_ap_send(sdata); |
| 3918 | } |
| 3919 | |
| 3920 | struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, |
| 3921 | struct ieee80211_vif *vif) |
| 3922 | { |
| 3923 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 3924 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 3925 | struct cfg80211_bss *cbss; |
| 3926 | struct sk_buff *skb; |
| 3927 | const struct element *ssid; |
| 3928 | int ssid_len; |
| 3929 | |
| 3930 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 3931 | |
| 3932 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || |
| 3933 | ieee80211_vif_is_mld(&sdata->vif))) |
| 3934 | return NULL; |
| 3935 | |
| 3936 | if (ifmgd->associated) |
| 3937 | cbss = sdata->deflink.conf->bss; |
| 3938 | else if (ifmgd->auth_data) |
| 3939 | cbss = ifmgd->auth_data->bss; |
| 3940 | else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) |
| 3941 | cbss = ifmgd->assoc_data->link[0].bss; |
| 3942 | else |
| 3943 | return NULL; |
| 3944 | |
| 3945 | rcu_read_lock(); |
| 3946 | ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); |
| 3947 | if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, |
| 3948 | "invalid SSID element (len=%d)", |
| 3949 | ssid ? ssid->datalen : -1)) |
| 3950 | ssid_len = 0; |
| 3951 | else |
| 3952 | ssid_len = ssid->datalen; |
| 3953 | |
| 3954 | skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, |
| 3955 | (u32) -1, cbss->channel, |
| 3956 | ssid->data, ssid_len, |
| 3957 | NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); |
| 3958 | rcu_read_unlock(); |
| 3959 | |
| 3960 | return skb; |
| 3961 | } |
| 3962 | EXPORT_SYMBOL(ieee80211_ap_probereq_get); |
| 3963 | |
| 3964 | static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, |
| 3965 | const u8 *buf, size_t len, bool tx, |
| 3966 | u16 reason, bool reconnect) |
| 3967 | { |
| 3968 | struct ieee80211_event event = { |
| 3969 | .type = MLME_EVENT, |
| 3970 | .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, |
| 3971 | .u.mlme.reason = reason, |
| 3972 | }; |
| 3973 | |
| 3974 | if (tx) |
| 3975 | cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); |
| 3976 | else |
| 3977 | cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); |
| 3978 | |
| 3979 | drv_event_callback(sdata->local, sdata, &event); |
| 3980 | } |
| 3981 | |
| 3982 | static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) |
| 3983 | { |
| 3984 | struct ieee80211_local *local = sdata->local; |
| 3985 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 3986 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
| 3987 | bool tx = false; |
| 3988 | |
| 3989 | lockdep_assert_wiphy(local->hw.wiphy); |
| 3990 | |
| 3991 | if (!ifmgd->associated) |
| 3992 | return; |
| 3993 | |
| 3994 | /* only transmit if we have a link that makes that worthwhile */ |
| 3995 | for (unsigned int link_id = 0; |
| 3996 | link_id < ARRAY_SIZE(sdata->link); |
| 3997 | link_id++) { |
| 3998 | struct ieee80211_link_data *link; |
| 3999 | |
| 4000 | if (!ieee80211_vif_link_active(&sdata->vif, link_id)) |
| 4001 | continue; |
| 4002 | |
| 4003 | link = sdata_dereference(sdata->link[link_id], sdata); |
| 4004 | if (WARN_ON_ONCE(!link)) |
| 4005 | continue; |
| 4006 | |
| 4007 | if (link->u.mgd.csa.blocked_tx) |
| 4008 | continue; |
| 4009 | |
| 4010 | tx = true; |
| 4011 | break; |
| 4012 | } |
| 4013 | |
| 4014 | if (!ifmgd->driver_disconnect) { |
| 4015 | unsigned int link_id; |
| 4016 | |
| 4017 | /* |
| 4018 | * AP is probably out of range (or not reachable for another |
| 4019 | * reason) so remove the bss structs for that AP. In the case |
| 4020 | * of multi-link, it's not clear that all of them really are |
| 4021 | * out of range, but if they weren't the driver likely would |
| 4022 | * have switched to just have a single link active? |
| 4023 | */ |
| 4024 | for (link_id = 0; |
| 4025 | link_id < ARRAY_SIZE(sdata->link); |
| 4026 | link_id++) { |
| 4027 | struct ieee80211_link_data *link; |
| 4028 | |
| 4029 | link = sdata_dereference(sdata->link[link_id], sdata); |
| 4030 | if (!link) |
| 4031 | continue; |
| 4032 | cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); |
| 4033 | link->conf->bss = NULL; |
| 4034 | } |
| 4035 | } |
| 4036 | |
| 4037 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
| 4038 | ifmgd->driver_disconnect ? |
| 4039 | WLAN_REASON_DEAUTH_LEAVING : |
| 4040 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
| 4041 | tx, frame_buf); |
| 4042 | /* the other links will be destroyed */ |
| 4043 | sdata->vif.bss_conf.csa_active = false; |
| 4044 | sdata->deflink.u.mgd.csa.waiting_bcn = false; |
| 4045 | sdata->deflink.u.mgd.csa.blocked_tx = false; |
| 4046 | ieee80211_vif_unblock_queues_csa(sdata); |
| 4047 | |
| 4048 | ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, |
| 4049 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
| 4050 | ifmgd->reconnect); |
| 4051 | ifmgd->reconnect = false; |
| 4052 | } |
| 4053 | |
| 4054 | static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, |
| 4055 | struct wiphy_work *work) |
| 4056 | { |
| 4057 | struct ieee80211_sub_if_data *sdata = |
| 4058 | container_of(work, struct ieee80211_sub_if_data, |
| 4059 | u.mgd.beacon_connection_loss_work); |
| 4060 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 4061 | |
| 4062 | if (ifmgd->connection_loss) { |
| 4063 | sdata_info(sdata, "Connection to AP %pM lost\n", |
| 4064 | sdata->vif.cfg.ap_addr); |
| 4065 | __ieee80211_disconnect(sdata); |
| 4066 | ifmgd->connection_loss = false; |
| 4067 | } else if (ifmgd->driver_disconnect) { |
| 4068 | sdata_info(sdata, |
| 4069 | "Driver requested disconnection from AP %pM\n", |
| 4070 | sdata->vif.cfg.ap_addr); |
| 4071 | __ieee80211_disconnect(sdata); |
| 4072 | ifmgd->driver_disconnect = false; |
| 4073 | } else { |
| 4074 | if (ifmgd->associated) |
| 4075 | sdata->deflink.u.mgd.beacon_loss_count++; |
| 4076 | ieee80211_mgd_probe_ap(sdata, true); |
| 4077 | } |
| 4078 | } |
| 4079 | |
| 4080 | static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, |
| 4081 | struct wiphy_work *work) |
| 4082 | { |
| 4083 | struct ieee80211_sub_if_data *sdata = |
| 4084 | container_of(work, struct ieee80211_sub_if_data, |
| 4085 | u.mgd.csa_connection_drop_work); |
| 4086 | |
| 4087 | __ieee80211_disconnect(sdata); |
| 4088 | } |
| 4089 | |
| 4090 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
| 4091 | { |
| 4092 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 4093 | struct ieee80211_hw *hw = &sdata->local->hw; |
| 4094 | |
| 4095 | trace_api_beacon_loss(sdata); |
| 4096 | |
| 4097 | sdata->u.mgd.connection_loss = false; |
| 4098 | wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); |
| 4099 | } |
| 4100 | EXPORT_SYMBOL(ieee80211_beacon_loss); |
| 4101 | |
| 4102 | void ieee80211_connection_loss(struct ieee80211_vif *vif) |
| 4103 | { |
| 4104 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 4105 | struct ieee80211_hw *hw = &sdata->local->hw; |
| 4106 | |
| 4107 | trace_api_connection_loss(sdata); |
| 4108 | |
| 4109 | sdata->u.mgd.connection_loss = true; |
| 4110 | wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); |
| 4111 | } |
| 4112 | EXPORT_SYMBOL(ieee80211_connection_loss); |
| 4113 | |
| 4114 | void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) |
| 4115 | { |
| 4116 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 4117 | struct ieee80211_hw *hw = &sdata->local->hw; |
| 4118 | |
| 4119 | trace_api_disconnect(sdata, reconnect); |
| 4120 | |
| 4121 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
| 4122 | return; |
| 4123 | |
| 4124 | sdata->u.mgd.driver_disconnect = true; |
| 4125 | sdata->u.mgd.reconnect = reconnect; |
| 4126 | wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); |
| 4127 | } |
| 4128 | EXPORT_SYMBOL(ieee80211_disconnect); |
| 4129 | |
| 4130 | static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, |
| 4131 | bool assoc) |
| 4132 | { |
| 4133 | struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; |
| 4134 | |
| 4135 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 4136 | |
| 4137 | if (!assoc) { |
| 4138 | /* |
| 4139 | * we are not authenticated yet, the only timer that could be |
| 4140 | * running is the timeout for the authentication response which |
| 4141 | * which is not relevant anymore. |
| 4142 | */ |
| 4143 | del_timer_sync(&sdata->u.mgd.timer); |
| 4144 | sta_info_destroy_addr(sdata, auth_data->ap_addr); |
| 4145 | |
| 4146 | /* other links are destroyed */ |
| 4147 | eth_zero_addr(sdata->deflink.u.mgd.bssid); |
| 4148 | ieee80211_link_info_change_notify(sdata, &sdata->deflink, |
| 4149 | BSS_CHANGED_BSSID); |
| 4150 | sdata->u.mgd.flags = 0; |
| 4151 | |
| 4152 | ieee80211_link_release_channel(&sdata->deflink); |
| 4153 | ieee80211_vif_set_links(sdata, 0, 0); |
| 4154 | } |
| 4155 | |
| 4156 | cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); |
| 4157 | kfree(auth_data); |
| 4158 | sdata->u.mgd.auth_data = NULL; |
| 4159 | } |
| 4160 | |
| 4161 | enum assoc_status { |
| 4162 | ASSOC_SUCCESS, |
| 4163 | ASSOC_REJECTED, |
| 4164 | ASSOC_TIMEOUT, |
| 4165 | ASSOC_ABANDON, |
| 4166 | }; |
| 4167 | |
| 4168 | static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, |
| 4169 | enum assoc_status status) |
| 4170 | { |
| 4171 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; |
| 4172 | |
| 4173 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 4174 | |
| 4175 | if (status != ASSOC_SUCCESS) { |
| 4176 | /* |
| 4177 | * we are not associated yet, the only timer that could be |
| 4178 | * running is the timeout for the association response which |
| 4179 | * which is not relevant anymore. |
| 4180 | */ |
| 4181 | del_timer_sync(&sdata->u.mgd.timer); |
| 4182 | sta_info_destroy_addr(sdata, assoc_data->ap_addr); |
| 4183 | |
| 4184 | eth_zero_addr(sdata->deflink.u.mgd.bssid); |
| 4185 | ieee80211_link_info_change_notify(sdata, &sdata->deflink, |
| 4186 | BSS_CHANGED_BSSID); |
| 4187 | sdata->u.mgd.flags = 0; |
| 4188 | sdata->vif.bss_conf.mu_mimo_owner = false; |
| 4189 | |
| 4190 | if (status != ASSOC_REJECTED) { |
| 4191 | struct cfg80211_assoc_failure data = { |
| 4192 | .timeout = status == ASSOC_TIMEOUT, |
| 4193 | }; |
| 4194 | int i; |
| 4195 | |
| 4196 | BUILD_BUG_ON(ARRAY_SIZE(data.bss) != |
| 4197 | ARRAY_SIZE(assoc_data->link)); |
| 4198 | |
| 4199 | for (i = 0; i < ARRAY_SIZE(data.bss); i++) |
| 4200 | data.bss[i] = assoc_data->link[i].bss; |
| 4201 | |
| 4202 | if (ieee80211_vif_is_mld(&sdata->vif)) |
| 4203 | data.ap_mld_addr = assoc_data->ap_addr; |
| 4204 | |
| 4205 | cfg80211_assoc_failure(sdata->dev, &data); |
| 4206 | } |
| 4207 | |
| 4208 | ieee80211_link_release_channel(&sdata->deflink); |
| 4209 | ieee80211_vif_set_links(sdata, 0, 0); |
| 4210 | } |
| 4211 | |
| 4212 | kfree(assoc_data); |
| 4213 | sdata->u.mgd.assoc_data = NULL; |
| 4214 | } |
| 4215 | |
| 4216 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
| 4217 | struct ieee80211_mgmt *mgmt, size_t len) |
| 4218 | { |
| 4219 | struct ieee80211_local *local = sdata->local; |
| 4220 | struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; |
| 4221 | const struct element *challenge; |
| 4222 | u8 *pos; |
| 4223 | u32 tx_flags = 0; |
| 4224 | struct ieee80211_prep_tx_info info = { |
| 4225 | .subtype = IEEE80211_STYPE_AUTH, |
| 4226 | .link_id = auth_data->link_id, |
| 4227 | }; |
| 4228 | |
| 4229 | pos = mgmt->u.auth.variable; |
| 4230 | challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, |
| 4231 | len - (pos - (u8 *)mgmt)); |
| 4232 | if (!challenge) |
| 4233 | return; |
| 4234 | auth_data->expected_transaction = 4; |
| 4235 | drv_mgd_prepare_tx(sdata->local, sdata, &info); |
| 4236 | if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) |
| 4237 | tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
| 4238 | IEEE80211_TX_INTFL_MLME_CONN_TX; |
| 4239 | ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, |
| 4240 | (void *)challenge, |
| 4241 | challenge->datalen + sizeof(*challenge), |
| 4242 | auth_data->ap_addr, auth_data->ap_addr, |
| 4243 | auth_data->key, auth_data->key_len, |
| 4244 | auth_data->key_idx, tx_flags); |
| 4245 | } |
| 4246 | |
| 4247 | static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) |
| 4248 | { |
| 4249 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 4250 | const u8 *ap_addr = ifmgd->auth_data->ap_addr; |
| 4251 | struct sta_info *sta; |
| 4252 | |
| 4253 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 4254 | |
| 4255 | sdata_info(sdata, "authenticated\n"); |
| 4256 | ifmgd->auth_data->done = true; |
| 4257 | ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; |
| 4258 | ifmgd->auth_data->timeout_started = true; |
| 4259 | run_again(sdata, ifmgd->auth_data->timeout); |
| 4260 | |
| 4261 | /* move station state to auth */ |
| 4262 | sta = sta_info_get(sdata, ap_addr); |
| 4263 | if (!sta) { |
| 4264 | WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); |
| 4265 | return false; |
| 4266 | } |
| 4267 | if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { |
| 4268 | sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); |
| 4269 | return false; |
| 4270 | } |
| 4271 | |
| 4272 | return true; |
| 4273 | } |
| 4274 | |
| 4275 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
| 4276 | struct ieee80211_mgmt *mgmt, size_t len) |
| 4277 | { |
| 4278 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 4279 | u16 auth_alg, auth_transaction, status_code; |
| 4280 | struct ieee80211_event event = { |
| 4281 | .type = MLME_EVENT, |
| 4282 | .u.mlme.data = AUTH_EVENT, |
| 4283 | }; |
| 4284 | struct ieee80211_prep_tx_info info = { |
| 4285 | .subtype = IEEE80211_STYPE_AUTH, |
| 4286 | }; |
| 4287 | |
| 4288 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 4289 | |
| 4290 | if (len < 24 + 6) |
| 4291 | return; |
| 4292 | |
| 4293 | if (!ifmgd->auth_data || ifmgd->auth_data->done) |
| 4294 | return; |
| 4295 | |
| 4296 | if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) |
| 4297 | return; |
| 4298 | |
| 4299 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); |
| 4300 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); |
| 4301 | status_code = le16_to_cpu(mgmt->u.auth.status_code); |
| 4302 | |
| 4303 | if (auth_alg != ifmgd->auth_data->algorithm || |
| 4304 | (auth_alg != WLAN_AUTH_SAE && |
| 4305 | auth_transaction != ifmgd->auth_data->expected_transaction) || |
| 4306 | (auth_alg == WLAN_AUTH_SAE && |
| 4307 | (auth_transaction < ifmgd->auth_data->expected_transaction || |
| 4308 | auth_transaction > 2))) { |
| 4309 | sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", |
| 4310 | mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, |
| 4311 | auth_transaction, |
| 4312 | ifmgd->auth_data->expected_transaction); |
| 4313 | goto notify_driver; |
| 4314 | } |
| 4315 | |
| 4316 | if (status_code != WLAN_STATUS_SUCCESS) { |
| 4317 | cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); |
| 4318 | |
| 4319 | if (auth_alg == WLAN_AUTH_SAE && |
| 4320 | (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || |
| 4321 | (auth_transaction == 1 && |
| 4322 | (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || |
| 4323 | status_code == WLAN_STATUS_SAE_PK)))) { |
| 4324 | /* waiting for userspace now */ |
| 4325 | ifmgd->auth_data->waiting = true; |
| 4326 | ifmgd->auth_data->timeout = |
| 4327 | jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; |
| 4328 | ifmgd->auth_data->timeout_started = true; |
| 4329 | run_again(sdata, ifmgd->auth_data->timeout); |
| 4330 | goto notify_driver; |
| 4331 | } |
| 4332 | |
| 4333 | sdata_info(sdata, "%pM denied authentication (status %d)\n", |
| 4334 | mgmt->sa, status_code); |
| 4335 | ieee80211_destroy_auth_data(sdata, false); |
| 4336 | event.u.mlme.status = MLME_DENIED; |
| 4337 | event.u.mlme.reason = status_code; |
| 4338 | drv_event_callback(sdata->local, sdata, &event); |
| 4339 | goto notify_driver; |
| 4340 | } |
| 4341 | |
| 4342 | switch (ifmgd->auth_data->algorithm) { |
| 4343 | case WLAN_AUTH_OPEN: |
| 4344 | case WLAN_AUTH_LEAP: |
| 4345 | case WLAN_AUTH_FT: |
| 4346 | case WLAN_AUTH_SAE: |
| 4347 | case WLAN_AUTH_FILS_SK: |
| 4348 | case WLAN_AUTH_FILS_SK_PFS: |
| 4349 | case WLAN_AUTH_FILS_PK: |
| 4350 | break; |
| 4351 | case WLAN_AUTH_SHARED_KEY: |
| 4352 | if (ifmgd->auth_data->expected_transaction != 4) { |
| 4353 | ieee80211_auth_challenge(sdata, mgmt, len); |
| 4354 | /* need another frame */ |
| 4355 | return; |
| 4356 | } |
| 4357 | break; |
| 4358 | default: |
| 4359 | WARN_ONCE(1, "invalid auth alg %d", |
| 4360 | ifmgd->auth_data->algorithm); |
| 4361 | goto notify_driver; |
| 4362 | } |
| 4363 | |
| 4364 | event.u.mlme.status = MLME_SUCCESS; |
| 4365 | info.success = 1; |
| 4366 | drv_event_callback(sdata->local, sdata, &event); |
| 4367 | if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || |
| 4368 | (auth_transaction == 2 && |
| 4369 | ifmgd->auth_data->expected_transaction == 2)) { |
| 4370 | if (!ieee80211_mark_sta_auth(sdata)) |
| 4371 | return; /* ignore frame -- wait for timeout */ |
| 4372 | } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && |
| 4373 | auth_transaction == 2) { |
| 4374 | sdata_info(sdata, "SAE peer confirmed\n"); |
| 4375 | ifmgd->auth_data->peer_confirmed = true; |
| 4376 | } |
| 4377 | |
| 4378 | cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); |
| 4379 | notify_driver: |
| 4380 | drv_mgd_complete_tx(sdata->local, sdata, &info); |
| 4381 | } |
| 4382 | |
| 4383 | #define case_WLAN(type) \ |
| 4384 | case WLAN_REASON_##type: return #type |
| 4385 | |
| 4386 | const char *ieee80211_get_reason_code_string(u16 reason_code) |
| 4387 | { |
| 4388 | switch (reason_code) { |
| 4389 | case_WLAN(UNSPECIFIED); |
| 4390 | case_WLAN(PREV_AUTH_NOT_VALID); |
| 4391 | case_WLAN(DEAUTH_LEAVING); |
| 4392 | case_WLAN(DISASSOC_DUE_TO_INACTIVITY); |
| 4393 | case_WLAN(DISASSOC_AP_BUSY); |
| 4394 | case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); |
| 4395 | case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); |
| 4396 | case_WLAN(DISASSOC_STA_HAS_LEFT); |
| 4397 | case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); |
| 4398 | case_WLAN(DISASSOC_BAD_POWER); |
| 4399 | case_WLAN(DISASSOC_BAD_SUPP_CHAN); |
| 4400 | case_WLAN(INVALID_IE); |
| 4401 | case_WLAN(MIC_FAILURE); |
| 4402 | case_WLAN(4WAY_HANDSHAKE_TIMEOUT); |
| 4403 | case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); |
| 4404 | case_WLAN(IE_DIFFERENT); |
| 4405 | case_WLAN(INVALID_GROUP_CIPHER); |
| 4406 | case_WLAN(INVALID_PAIRWISE_CIPHER); |
| 4407 | case_WLAN(INVALID_AKMP); |
| 4408 | case_WLAN(UNSUPP_RSN_VERSION); |
| 4409 | case_WLAN(INVALID_RSN_IE_CAP); |
| 4410 | case_WLAN(IEEE8021X_FAILED); |
| 4411 | case_WLAN(CIPHER_SUITE_REJECTED); |
| 4412 | case_WLAN(DISASSOC_UNSPECIFIED_QOS); |
| 4413 | case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); |
| 4414 | case_WLAN(DISASSOC_LOW_ACK); |
| 4415 | case_WLAN(DISASSOC_QAP_EXCEED_TXOP); |
| 4416 | case_WLAN(QSTA_LEAVE_QBSS); |
| 4417 | case_WLAN(QSTA_NOT_USE); |
| 4418 | case_WLAN(QSTA_REQUIRE_SETUP); |
| 4419 | case_WLAN(QSTA_TIMEOUT); |
| 4420 | case_WLAN(QSTA_CIPHER_NOT_SUPP); |
| 4421 | case_WLAN(MESH_PEER_CANCELED); |
| 4422 | case_WLAN(MESH_MAX_PEERS); |
| 4423 | case_WLAN(MESH_CONFIG); |
| 4424 | case_WLAN(MESH_CLOSE); |
| 4425 | case_WLAN(MESH_MAX_RETRIES); |
| 4426 | case_WLAN(MESH_CONFIRM_TIMEOUT); |
| 4427 | case_WLAN(MESH_INVALID_GTK); |
| 4428 | case_WLAN(MESH_INCONSISTENT_PARAM); |
| 4429 | case_WLAN(MESH_INVALID_SECURITY); |
| 4430 | case_WLAN(MESH_PATH_ERROR); |
| 4431 | case_WLAN(MESH_PATH_NOFORWARD); |
| 4432 | case_WLAN(MESH_PATH_DEST_UNREACHABLE); |
| 4433 | case_WLAN(MAC_EXISTS_IN_MBSS); |
| 4434 | case_WLAN(MESH_CHAN_REGULATORY); |
| 4435 | case_WLAN(MESH_CHAN); |
| 4436 | default: return "<unknown>"; |
| 4437 | } |
| 4438 | } |
| 4439 | |
| 4440 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
| 4441 | struct ieee80211_mgmt *mgmt, size_t len) |
| 4442 | { |
| 4443 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 4444 | u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); |
| 4445 | |
| 4446 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 4447 | |
| 4448 | if (len < 24 + 2) |
| 4449 | return; |
| 4450 | |
| 4451 | if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { |
| 4452 | ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); |
| 4453 | return; |
| 4454 | } |
| 4455 | |
| 4456 | if (ifmgd->associated && |
| 4457 | ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { |
| 4458 | sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", |
| 4459 | sdata->vif.cfg.ap_addr, reason_code, |
| 4460 | ieee80211_get_reason_code_string(reason_code)); |
| 4461 | |
| 4462 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
| 4463 | |
| 4464 | ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, |
| 4465 | reason_code, false); |
| 4466 | return; |
| 4467 | } |
| 4468 | |
| 4469 | if (ifmgd->assoc_data && |
| 4470 | ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { |
| 4471 | sdata_info(sdata, |
| 4472 | "deauthenticated from %pM while associating (Reason: %u=%s)\n", |
| 4473 | ifmgd->assoc_data->ap_addr, reason_code, |
| 4474 | ieee80211_get_reason_code_string(reason_code)); |
| 4475 | |
| 4476 | ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); |
| 4477 | |
| 4478 | cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); |
| 4479 | return; |
| 4480 | } |
| 4481 | } |
| 4482 | |
| 4483 | |
| 4484 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
| 4485 | struct ieee80211_mgmt *mgmt, size_t len) |
| 4486 | { |
| 4487 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 4488 | u16 reason_code; |
| 4489 | |
| 4490 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 4491 | |
| 4492 | if (len < 24 + 2) |
| 4493 | return; |
| 4494 | |
| 4495 | if (!ifmgd->associated || |
| 4496 | !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) |
| 4497 | return; |
| 4498 | |
| 4499 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); |
| 4500 | |
| 4501 | if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { |
| 4502 | ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); |
| 4503 | return; |
| 4504 | } |
| 4505 | |
| 4506 | sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", |
| 4507 | sdata->vif.cfg.ap_addr, reason_code, |
| 4508 | ieee80211_get_reason_code_string(reason_code)); |
| 4509 | |
| 4510 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
| 4511 | |
| 4512 | ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, |
| 4513 | false); |
| 4514 | } |
| 4515 | |
| 4516 | static void ieee80211_get_rates(struct ieee80211_supported_band *sband, |
| 4517 | u8 *supp_rates, unsigned int supp_rates_len, |
| 4518 | u32 *rates, u32 *basic_rates, |
| 4519 | bool *have_higher_than_11mbit, |
| 4520 | int *min_rate, int *min_rate_index) |
| 4521 | { |
| 4522 | int i, j; |
| 4523 | |
| 4524 | for (i = 0; i < supp_rates_len; i++) { |
| 4525 | int rate = supp_rates[i] & 0x7f; |
| 4526 | bool is_basic = !!(supp_rates[i] & 0x80); |
| 4527 | |
| 4528 | if ((rate * 5) > 110) |
| 4529 | *have_higher_than_11mbit = true; |
| 4530 | |
| 4531 | /* |
| 4532 | * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership |
| 4533 | * selectors since they're not rates. |
| 4534 | * |
| 4535 | * Note: Even though the membership selector and the basic |
| 4536 | * rate flag share the same bit, they are not exactly |
| 4537 | * the same. |
| 4538 | */ |
| 4539 | if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || |
| 4540 | supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || |
| 4541 | supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || |
| 4542 | supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || |
| 4543 | supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) |
| 4544 | continue; |
| 4545 | |
| 4546 | for (j = 0; j < sband->n_bitrates; j++) { |
| 4547 | struct ieee80211_rate *br; |
| 4548 | int brate; |
| 4549 | |
| 4550 | br = &sband->bitrates[j]; |
| 4551 | |
| 4552 | brate = DIV_ROUND_UP(br->bitrate, 5); |
| 4553 | if (brate == rate) { |
| 4554 | *rates |= BIT(j); |
| 4555 | if (is_basic) |
| 4556 | *basic_rates |= BIT(j); |
| 4557 | if ((rate * 5) < *min_rate) { |
| 4558 | *min_rate = rate * 5; |
| 4559 | *min_rate_index = j; |
| 4560 | } |
| 4561 | break; |
| 4562 | } |
| 4563 | } |
| 4564 | } |
| 4565 | } |
| 4566 | |
| 4567 | static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, |
| 4568 | struct ieee80211_supported_band *sband, |
| 4569 | const struct link_sta_info *link_sta, |
| 4570 | const struct ieee802_11_elems *elems) |
| 4571 | { |
| 4572 | const struct ieee80211_sta_he_cap *own_he_cap = |
| 4573 | ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); |
| 4574 | |
| 4575 | if (elems->ext_capab_len < 10) |
| 4576 | return false; |
| 4577 | |
| 4578 | if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) |
| 4579 | return false; |
| 4580 | |
| 4581 | return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & |
| 4582 | IEEE80211_HE_MAC_CAP0_TWT_RES && |
| 4583 | own_he_cap && |
| 4584 | (own_he_cap->he_cap_elem.mac_cap_info[0] & |
| 4585 | IEEE80211_HE_MAC_CAP0_TWT_REQ); |
| 4586 | } |
| 4587 | |
| 4588 | static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, |
| 4589 | struct ieee80211_supported_band *sband, |
| 4590 | struct ieee80211_link_data *link, |
| 4591 | struct link_sta_info *link_sta, |
| 4592 | struct ieee802_11_elems *elems) |
| 4593 | { |
| 4594 | bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); |
| 4595 | |
| 4596 | if (link->conf->twt_requester != twt) { |
| 4597 | link->conf->twt_requester = twt; |
| 4598 | return BSS_CHANGED_TWT; |
| 4599 | } |
| 4600 | return 0; |
| 4601 | } |
| 4602 | |
| 4603 | static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, |
| 4604 | struct ieee80211_bss_conf *bss_conf, |
| 4605 | struct ieee80211_supported_band *sband, |
| 4606 | struct link_sta_info *link_sta) |
| 4607 | { |
| 4608 | const struct ieee80211_sta_he_cap *own_he_cap = |
| 4609 | ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); |
| 4610 | |
| 4611 | return bss_conf->he_support && |
| 4612 | (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & |
| 4613 | IEEE80211_HE_MAC_CAP2_BCAST_TWT) && |
| 4614 | own_he_cap && |
| 4615 | (own_he_cap->he_cap_elem.mac_cap_info[2] & |
| 4616 | IEEE80211_HE_MAC_CAP2_BCAST_TWT); |
| 4617 | } |
| 4618 | |
| 4619 | static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, |
| 4620 | struct link_sta_info *link_sta, |
| 4621 | struct cfg80211_bss *cbss, |
| 4622 | struct ieee80211_mgmt *mgmt, |
| 4623 | const u8 *elem_start, |
| 4624 | unsigned int elem_len, |
| 4625 | u64 *changed) |
| 4626 | { |
| 4627 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 4628 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; |
| 4629 | struct ieee80211_bss_conf *bss_conf = link->conf; |
| 4630 | struct ieee80211_local *local = sdata->local; |
| 4631 | unsigned int link_id = link->link_id; |
| 4632 | struct ieee80211_elems_parse_params parse_params = { |
| 4633 | .mode = link->u.mgd.conn.mode, |
| 4634 | .start = elem_start, |
| 4635 | .len = elem_len, |
| 4636 | .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, |
| 4637 | .from_ap = true, |
| 4638 | }; |
| 4639 | bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; |
| 4640 | bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; |
| 4641 | bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; |
| 4642 | const struct cfg80211_bss_ies *bss_ies = NULL; |
| 4643 | struct ieee80211_supported_band *sband; |
| 4644 | struct ieee802_11_elems *elems; |
| 4645 | const __le16 prof_bss_param_ch_present = |
| 4646 | cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); |
| 4647 | u16 capab_info; |
| 4648 | bool ret; |
| 4649 | |
| 4650 | elems = ieee802_11_parse_elems_full(&parse_params); |
| 4651 | if (!elems) |
| 4652 | return false; |
| 4653 | |
| 4654 | if (link_id == assoc_data->assoc_link_id) { |
| 4655 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
| 4656 | |
| 4657 | /* |
| 4658 | * we should not get to this flow unless the association was |
| 4659 | * successful, so set the status directly to success |
| 4660 | */ |
| 4661 | assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; |
| 4662 | if (elems->ml_basic) { |
| 4663 | int bss_param_ch_cnt = |
| 4664 | ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); |
| 4665 | |
| 4666 | if (bss_param_ch_cnt < 0) { |
| 4667 | ret = false; |
| 4668 | goto out; |
| 4669 | } |
| 4670 | link->u.mgd.bss_param_ch_cnt = bss_param_ch_cnt; |
| 4671 | } |
| 4672 | } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || |
| 4673 | !elems->prof || |
| 4674 | !(elems->prof->control & prof_bss_param_ch_present)) { |
| 4675 | ret = false; |
| 4676 | goto out; |
| 4677 | } else { |
| 4678 | const u8 *ptr = elems->prof->variable + |
| 4679 | elems->prof->sta_info_len - 1; |
| 4680 | |
| 4681 | /* |
| 4682 | * During parsing, we validated that these fields exist, |
| 4683 | * otherwise elems->prof would have been set to NULL. |
| 4684 | */ |
| 4685 | capab_info = get_unaligned_le16(ptr); |
| 4686 | assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); |
| 4687 | link->u.mgd.bss_param_ch_cnt = |
| 4688 | ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); |
| 4689 | |
| 4690 | if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { |
| 4691 | link_info(link, "association response status code=%u\n", |
| 4692 | assoc_data->link[link_id].status); |
| 4693 | ret = true; |
| 4694 | goto out; |
| 4695 | } |
| 4696 | } |
| 4697 | |
| 4698 | if (!is_s1g && !elems->supp_rates) { |
| 4699 | sdata_info(sdata, "no SuppRates element in AssocResp\n"); |
| 4700 | ret = false; |
| 4701 | goto out; |
| 4702 | } |
| 4703 | |
| 4704 | link->u.mgd.tdls_chan_switch_prohibited = |
| 4705 | elems->ext_capab && elems->ext_capab_len >= 5 && |
| 4706 | (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); |
| 4707 | |
| 4708 | /* |
| 4709 | * Some APs are erroneously not including some information in their |
| 4710 | * (re)association response frames. Try to recover by using the data |
| 4711 | * from the beacon or probe response. This seems to afflict mobile |
| 4712 | * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", |
| 4713 | * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. |
| 4714 | */ |
| 4715 | if (!is_6ghz && |
| 4716 | ((assoc_data->wmm && !elems->wmm_param) || |
| 4717 | (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && |
| 4718 | (!elems->ht_cap_elem || !elems->ht_operation)) || |
| 4719 | (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && |
| 4720 | (!elems->vht_cap_elem || !elems->vht_operation)))) { |
| 4721 | const struct cfg80211_bss_ies *ies; |
| 4722 | struct ieee802_11_elems *bss_elems; |
| 4723 | |
| 4724 | rcu_read_lock(); |
| 4725 | ies = rcu_dereference(cbss->ies); |
| 4726 | if (ies) |
| 4727 | bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, |
| 4728 | GFP_ATOMIC); |
| 4729 | rcu_read_unlock(); |
| 4730 | if (!bss_ies) { |
| 4731 | ret = false; |
| 4732 | goto out; |
| 4733 | } |
| 4734 | |
| 4735 | parse_params.start = bss_ies->data; |
| 4736 | parse_params.len = bss_ies->len; |
| 4737 | parse_params.bss = cbss; |
| 4738 | bss_elems = ieee802_11_parse_elems_full(&parse_params); |
| 4739 | if (!bss_elems) { |
| 4740 | ret = false; |
| 4741 | goto out; |
| 4742 | } |
| 4743 | |
| 4744 | if (assoc_data->wmm && |
| 4745 | !elems->wmm_param && bss_elems->wmm_param) { |
| 4746 | elems->wmm_param = bss_elems->wmm_param; |
| 4747 | sdata_info(sdata, |
| 4748 | "AP bug: WMM param missing from AssocResp\n"); |
| 4749 | } |
| 4750 | |
| 4751 | /* |
| 4752 | * Also check if we requested HT/VHT, otherwise the AP doesn't |
| 4753 | * have to include the IEs in the (re)association response. |
| 4754 | */ |
| 4755 | if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && |
| 4756 | link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { |
| 4757 | elems->ht_cap_elem = bss_elems->ht_cap_elem; |
| 4758 | sdata_info(sdata, |
| 4759 | "AP bug: HT capability missing from AssocResp\n"); |
| 4760 | } |
| 4761 | if (!elems->ht_operation && bss_elems->ht_operation && |
| 4762 | link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { |
| 4763 | elems->ht_operation = bss_elems->ht_operation; |
| 4764 | sdata_info(sdata, |
| 4765 | "AP bug: HT operation missing from AssocResp\n"); |
| 4766 | } |
| 4767 | |
| 4768 | if (is_5ghz) { |
| 4769 | if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && |
| 4770 | link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { |
| 4771 | elems->vht_cap_elem = bss_elems->vht_cap_elem; |
| 4772 | sdata_info(sdata, |
| 4773 | "AP bug: VHT capa missing from AssocResp\n"); |
| 4774 | } |
| 4775 | |
| 4776 | if (!elems->vht_operation && bss_elems->vht_operation && |
| 4777 | link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { |
| 4778 | elems->vht_operation = bss_elems->vht_operation; |
| 4779 | sdata_info(sdata, |
| 4780 | "AP bug: VHT operation missing from AssocResp\n"); |
| 4781 | } |
| 4782 | } |
| 4783 | kfree(bss_elems); |
| 4784 | } |
| 4785 | |
| 4786 | /* |
| 4787 | * We previously checked these in the beacon/probe response, so |
| 4788 | * they should be present here. This is just a safety net. |
| 4789 | * Note that the ieee80211_config_bw() below would also check |
| 4790 | * for this (and more), but this has better error reporting. |
| 4791 | */ |
| 4792 | if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && |
| 4793 | (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { |
| 4794 | sdata_info(sdata, |
| 4795 | "HT AP is missing WMM params or HT capability/operation\n"); |
| 4796 | ret = false; |
| 4797 | goto out; |
| 4798 | } |
| 4799 | |
| 4800 | if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && |
| 4801 | (!elems->vht_cap_elem || !elems->vht_operation)) { |
| 4802 | sdata_info(sdata, |
| 4803 | "VHT AP is missing VHT capability/operation\n"); |
| 4804 | ret = false; |
| 4805 | goto out; |
| 4806 | } |
| 4807 | |
| 4808 | /* check/update if AP changed anything in assoc response vs. scan */ |
| 4809 | if (ieee80211_config_bw(link, elems, |
| 4810 | link_id == assoc_data->assoc_link_id, |
| 4811 | changed)) { |
| 4812 | ret = false; |
| 4813 | goto out; |
| 4814 | } |
| 4815 | |
| 4816 | if (WARN_ON(!link->conf->chanreq.oper.chan)) { |
| 4817 | ret = false; |
| 4818 | goto out; |
| 4819 | } |
| 4820 | sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; |
| 4821 | |
| 4822 | /* Set up internal HT/VHT capabilities */ |
| 4823 | if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) |
| 4824 | ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
| 4825 | elems->ht_cap_elem, |
| 4826 | link_sta); |
| 4827 | |
| 4828 | if (elems->vht_cap_elem && |
| 4829 | link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { |
| 4830 | const struct ieee80211_vht_cap *bss_vht_cap = NULL; |
| 4831 | const struct cfg80211_bss_ies *ies; |
| 4832 | |
| 4833 | /* |
| 4834 | * Cisco AP module 9115 with FW 17.3 has a bug and sends a |
| 4835 | * too large maximum MPDU length in the association response |
| 4836 | * (indicating 12k) that it cannot actually process ... |
| 4837 | * Work around that. |
| 4838 | */ |
| 4839 | rcu_read_lock(); |
| 4840 | ies = rcu_dereference(cbss->ies); |
| 4841 | if (ies) { |
| 4842 | const struct element *elem; |
| 4843 | |
| 4844 | elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, |
| 4845 | ies->data, ies->len); |
| 4846 | if (elem && elem->datalen >= sizeof(*bss_vht_cap)) |
| 4847 | bss_vht_cap = (const void *)elem->data; |
| 4848 | } |
| 4849 | |
| 4850 | ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, |
| 4851 | elems->vht_cap_elem, |
| 4852 | bss_vht_cap, link_sta); |
| 4853 | rcu_read_unlock(); |
| 4854 | } |
| 4855 | |
| 4856 | if (elems->he_operation && |
| 4857 | link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && |
| 4858 | elems->he_cap) { |
| 4859 | ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, |
| 4860 | elems->he_cap, |
| 4861 | elems->he_cap_len, |
| 4862 | elems->he_6ghz_capa, |
| 4863 | link_sta); |
| 4864 | |
| 4865 | bss_conf->he_support = link_sta->pub->he_cap.has_he; |
| 4866 | if (elems->rsnx && elems->rsnx_len && |
| 4867 | (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && |
| 4868 | wiphy_ext_feature_isset(local->hw.wiphy, |
| 4869 | NL80211_EXT_FEATURE_PROTECTED_TWT)) |
| 4870 | bss_conf->twt_protected = true; |
| 4871 | else |
| 4872 | bss_conf->twt_protected = false; |
| 4873 | |
| 4874 | *changed |= ieee80211_recalc_twt_req(sdata, sband, link, |
| 4875 | link_sta, elems); |
| 4876 | |
| 4877 | if (elems->eht_operation && elems->eht_cap && |
| 4878 | link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { |
| 4879 | ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, |
| 4880 | elems->he_cap, |
| 4881 | elems->he_cap_len, |
| 4882 | elems->eht_cap, |
| 4883 | elems->eht_cap_len, |
| 4884 | link_sta); |
| 4885 | |
| 4886 | bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; |
| 4887 | } else { |
| 4888 | bss_conf->eht_support = false; |
| 4889 | } |
| 4890 | } else { |
| 4891 | bss_conf->he_support = false; |
| 4892 | bss_conf->twt_requester = false; |
| 4893 | bss_conf->twt_protected = false; |
| 4894 | bss_conf->eht_support = false; |
| 4895 | } |
| 4896 | |
| 4897 | bss_conf->twt_broadcast = |
| 4898 | ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); |
| 4899 | |
| 4900 | if (bss_conf->he_support) { |
| 4901 | bss_conf->he_bss_color.color = |
| 4902 | le32_get_bits(elems->he_operation->he_oper_params, |
| 4903 | IEEE80211_HE_OPERATION_BSS_COLOR_MASK); |
| 4904 | bss_conf->he_bss_color.partial = |
| 4905 | le32_get_bits(elems->he_operation->he_oper_params, |
| 4906 | IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); |
| 4907 | bss_conf->he_bss_color.enabled = |
| 4908 | !le32_get_bits(elems->he_operation->he_oper_params, |
| 4909 | IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); |
| 4910 | |
| 4911 | if (bss_conf->he_bss_color.enabled) |
| 4912 | *changed |= BSS_CHANGED_HE_BSS_COLOR; |
| 4913 | |
| 4914 | bss_conf->htc_trig_based_pkt_ext = |
| 4915 | le32_get_bits(elems->he_operation->he_oper_params, |
| 4916 | IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); |
| 4917 | bss_conf->frame_time_rts_th = |
| 4918 | le32_get_bits(elems->he_operation->he_oper_params, |
| 4919 | IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); |
| 4920 | |
| 4921 | bss_conf->uora_exists = !!elems->uora_element; |
| 4922 | if (elems->uora_element) |
| 4923 | bss_conf->uora_ocw_range = elems->uora_element[0]; |
| 4924 | |
| 4925 | ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); |
| 4926 | ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); |
| 4927 | /* TODO: OPEN: what happens if BSS color disable is set? */ |
| 4928 | } |
| 4929 | |
| 4930 | if (cbss->transmitted_bss) { |
| 4931 | bss_conf->nontransmitted = true; |
| 4932 | ether_addr_copy(bss_conf->transmitter_bssid, |
| 4933 | cbss->transmitted_bss->bssid); |
| 4934 | bss_conf->bssid_indicator = cbss->max_bssid_indicator; |
| 4935 | bss_conf->bssid_index = cbss->bssid_index; |
| 4936 | } |
| 4937 | |
| 4938 | /* |
| 4939 | * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data |
| 4940 | * in their association response, so ignore that data for our own |
| 4941 | * configuration. If it changed since the last beacon, we'll get the |
| 4942 | * next beacon and update then. |
| 4943 | */ |
| 4944 | |
| 4945 | /* |
| 4946 | * If an operating mode notification IE is present, override the |
| 4947 | * NSS calculation (that would be done in rate_control_rate_init()) |
| 4948 | * and use the # of streams from that element. |
| 4949 | */ |
| 4950 | if (elems->opmode_notif && |
| 4951 | !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { |
| 4952 | u8 nss; |
| 4953 | |
| 4954 | nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; |
| 4955 | nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; |
| 4956 | nss += 1; |
| 4957 | link_sta->pub->rx_nss = nss; |
| 4958 | } |
| 4959 | |
| 4960 | /* |
| 4961 | * Always handle WMM once after association regardless |
| 4962 | * of the first value the AP uses. Setting -1 here has |
| 4963 | * that effect because the AP values is an unsigned |
| 4964 | * 4-bit value. |
| 4965 | */ |
| 4966 | link->u.mgd.wmm_last_param_set = -1; |
| 4967 | link->u.mgd.mu_edca_last_param_set = -1; |
| 4968 | |
| 4969 | if (link->u.mgd.disable_wmm_tracking) { |
| 4970 | ieee80211_set_wmm_default(link, false, false); |
| 4971 | } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, |
| 4972 | elems->wmm_param_len, |
| 4973 | elems->mu_edca_param_set)) { |
| 4974 | /* still enable QoS since we might have HT/VHT */ |
| 4975 | ieee80211_set_wmm_default(link, false, true); |
| 4976 | /* disable WMM tracking in this case to disable |
| 4977 | * tracking WMM parameter changes in the beacon if |
| 4978 | * the parameters weren't actually valid. Doing so |
| 4979 | * avoids changing parameters very strangely when |
| 4980 | * the AP is going back and forth between valid and |
| 4981 | * invalid parameters. |
| 4982 | */ |
| 4983 | link->u.mgd.disable_wmm_tracking = true; |
| 4984 | } |
| 4985 | |
| 4986 | if (elems->max_idle_period_ie) { |
| 4987 | bss_conf->max_idle_period = |
| 4988 | le16_to_cpu(elems->max_idle_period_ie->max_idle_period); |
| 4989 | bss_conf->protected_keep_alive = |
| 4990 | !!(elems->max_idle_period_ie->idle_options & |
| 4991 | WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); |
| 4992 | *changed |= BSS_CHANGED_KEEP_ALIVE; |
| 4993 | } else { |
| 4994 | bss_conf->max_idle_period = 0; |
| 4995 | bss_conf->protected_keep_alive = false; |
| 4996 | } |
| 4997 | |
| 4998 | /* set assoc capability (AID was already set earlier), |
| 4999 | * ieee80211_set_associated() will tell the driver */ |
| 5000 | bss_conf->assoc_capability = capab_info; |
| 5001 | |
| 5002 | ret = true; |
| 5003 | out: |
| 5004 | kfree(elems); |
| 5005 | kfree(bss_ies); |
| 5006 | return ret; |
| 5007 | } |
| 5008 | |
| 5009 | static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, |
| 5010 | struct sta_info *sta, |
| 5011 | struct link_sta_info *link_sta, |
| 5012 | struct cfg80211_bss *cbss) |
| 5013 | { |
| 5014 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 5015 | struct ieee80211_local *local = sdata->local; |
| 5016 | struct ieee80211_bss *bss = (void *)cbss->priv; |
| 5017 | u32 rates = 0, basic_rates = 0; |
| 5018 | bool have_higher_than_11mbit = false; |
| 5019 | int min_rate = INT_MAX, min_rate_index = -1; |
| 5020 | struct ieee80211_supported_band *sband; |
| 5021 | |
| 5022 | memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); |
| 5023 | memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); |
| 5024 | |
| 5025 | /* TODO: S1G Basic Rate Set is expressed elsewhere */ |
| 5026 | if (cbss->channel->band == NL80211_BAND_S1GHZ) { |
| 5027 | ieee80211_s1g_sta_rate_init(sta); |
| 5028 | return 0; |
| 5029 | } |
| 5030 | |
| 5031 | sband = local->hw.wiphy->bands[cbss->channel->band]; |
| 5032 | |
| 5033 | ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, |
| 5034 | &rates, &basic_rates, &have_higher_than_11mbit, |
| 5035 | &min_rate, &min_rate_index); |
| 5036 | |
| 5037 | /* |
| 5038 | * This used to be a workaround for basic rates missing |
| 5039 | * in the association response frame. Now that we no |
| 5040 | * longer use the basic rates from there, it probably |
| 5041 | * doesn't happen any more, but keep the workaround so |
| 5042 | * in case some *other* APs are buggy in different ways |
| 5043 | * we can connect -- with a warning. |
| 5044 | * Allow this workaround only in case the AP provided at least |
| 5045 | * one rate. |
| 5046 | */ |
| 5047 | if (min_rate_index < 0) { |
| 5048 | link_info(link, "No legacy rates in association response\n"); |
| 5049 | return -EINVAL; |
| 5050 | } else if (!basic_rates) { |
| 5051 | link_info(link, "No basic rates, using min rate instead\n"); |
| 5052 | basic_rates = BIT(min_rate_index); |
| 5053 | } |
| 5054 | |
| 5055 | if (rates) |
| 5056 | link_sta->pub->supp_rates[cbss->channel->band] = rates; |
| 5057 | else |
| 5058 | link_info(link, "No rates found, keeping mandatory only\n"); |
| 5059 | |
| 5060 | link->conf->basic_rates = basic_rates; |
| 5061 | |
| 5062 | /* cf. IEEE 802.11 9.2.12 */ |
| 5063 | link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && |
| 5064 | have_higher_than_11mbit; |
| 5065 | |
| 5066 | return 0; |
| 5067 | } |
| 5068 | |
| 5069 | static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, |
| 5070 | struct cfg80211_bss *cbss) |
| 5071 | { |
| 5072 | struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; |
| 5073 | const struct element *ht_cap_elem, *vht_cap_elem; |
| 5074 | const struct cfg80211_bss_ies *ies; |
| 5075 | const struct ieee80211_ht_cap *ht_cap; |
| 5076 | const struct ieee80211_vht_cap *vht_cap; |
| 5077 | const struct ieee80211_he_cap_elem *he_cap; |
| 5078 | const struct element *he_cap_elem; |
| 5079 | u16 mcs_80_map, mcs_160_map; |
| 5080 | int i, mcs_nss_size; |
| 5081 | bool support_160; |
| 5082 | u8 chains = 1; |
| 5083 | |
| 5084 | if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) |
| 5085 | return chains; |
| 5086 | |
| 5087 | ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); |
| 5088 | if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { |
| 5089 | ht_cap = (void *)ht_cap_elem->data; |
| 5090 | chains = ieee80211_mcs_to_chains(&ht_cap->mcs); |
| 5091 | /* |
| 5092 | * TODO: use "Tx Maximum Number Spatial Streams Supported" and |
| 5093 | * "Tx Unequal Modulation Supported" fields. |
| 5094 | */ |
| 5095 | } |
| 5096 | |
| 5097 | if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) |
| 5098 | return chains; |
| 5099 | |
| 5100 | vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); |
| 5101 | if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { |
| 5102 | u8 nss; |
| 5103 | u16 tx_mcs_map; |
| 5104 | |
| 5105 | vht_cap = (void *)vht_cap_elem->data; |
| 5106 | tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); |
| 5107 | for (nss = 8; nss > 0; nss--) { |
| 5108 | if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != |
| 5109 | IEEE80211_VHT_MCS_NOT_SUPPORTED) |
| 5110 | break; |
| 5111 | } |
| 5112 | /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ |
| 5113 | chains = max(chains, nss); |
| 5114 | } |
| 5115 | |
| 5116 | if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) |
| 5117 | return chains; |
| 5118 | |
| 5119 | ies = rcu_dereference(cbss->ies); |
| 5120 | he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, |
| 5121 | ies->data, ies->len); |
| 5122 | |
| 5123 | if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) |
| 5124 | return chains; |
| 5125 | |
| 5126 | /* skip one byte ext_tag_id */ |
| 5127 | he_cap = (void *)(he_cap_elem->data + 1); |
| 5128 | mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); |
| 5129 | |
| 5130 | /* invalid HE IE */ |
| 5131 | if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) |
| 5132 | return chains; |
| 5133 | |
| 5134 | /* mcs_nss is right after he_cap info */ |
| 5135 | he_mcs_nss_supp = (void *)(he_cap + 1); |
| 5136 | |
| 5137 | mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); |
| 5138 | |
| 5139 | for (i = 7; i >= 0; i--) { |
| 5140 | u8 mcs_80 = mcs_80_map >> (2 * i) & 3; |
| 5141 | |
| 5142 | if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { |
| 5143 | chains = max_t(u8, chains, i + 1); |
| 5144 | break; |
| 5145 | } |
| 5146 | } |
| 5147 | |
| 5148 | support_160 = he_cap->phy_cap_info[0] & |
| 5149 | IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; |
| 5150 | |
| 5151 | if (!support_160) |
| 5152 | return chains; |
| 5153 | |
| 5154 | mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); |
| 5155 | for (i = 7; i >= 0; i--) { |
| 5156 | u8 mcs_160 = mcs_160_map >> (2 * i) & 3; |
| 5157 | |
| 5158 | if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { |
| 5159 | chains = max_t(u8, chains, i + 1); |
| 5160 | break; |
| 5161 | } |
| 5162 | } |
| 5163 | |
| 5164 | return chains; |
| 5165 | } |
| 5166 | |
| 5167 | static void |
| 5168 | ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, |
| 5169 | struct ieee80211_supported_band *sband, |
| 5170 | struct cfg80211_assoc_request *req, |
| 5171 | bool wmm_used, int link_id, |
| 5172 | struct ieee80211_conn_settings *conn) |
| 5173 | { |
| 5174 | struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; |
| 5175 | bool is_5ghz = sband->band == NL80211_BAND_5GHZ; |
| 5176 | bool is_6ghz = sband->band == NL80211_BAND_6GHZ; |
| 5177 | const struct ieee80211_sta_he_cap *he_cap; |
| 5178 | const struct ieee80211_sta_eht_cap *eht_cap; |
| 5179 | struct ieee80211_sta_vht_cap vht_cap; |
| 5180 | |
| 5181 | if (sband->band == NL80211_BAND_S1GHZ) { |
| 5182 | conn->mode = IEEE80211_CONN_MODE_S1G; |
| 5183 | conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; |
| 5184 | mlme_dbg(sdata, "operating as S1G STA\n"); |
| 5185 | return; |
| 5186 | } |
| 5187 | |
| 5188 | conn->mode = IEEE80211_CONN_MODE_LEGACY; |
| 5189 | conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; |
| 5190 | |
| 5191 | ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); |
| 5192 | |
| 5193 | if (req && req->flags & ASSOC_REQ_DISABLE_HT) { |
| 5194 | mlme_link_id_dbg(sdata, link_id, |
| 5195 | "HT disabled by flag, limiting to legacy\n"); |
| 5196 | goto out; |
| 5197 | } |
| 5198 | |
| 5199 | if (!wmm_used) { |
| 5200 | mlme_link_id_dbg(sdata, link_id, |
| 5201 | "WMM/QoS not supported, limiting to legacy\n"); |
| 5202 | goto out; |
| 5203 | } |
| 5204 | |
| 5205 | if (req) { |
| 5206 | unsigned int i; |
| 5207 | |
| 5208 | for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { |
| 5209 | if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || |
| 5210 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || |
| 5211 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { |
| 5212 | netdev_info(sdata->dev, |
| 5213 | "WEP/TKIP use, limiting to legacy\n"); |
| 5214 | goto out; |
| 5215 | } |
| 5216 | } |
| 5217 | } |
| 5218 | |
| 5219 | if (!sta_ht_cap.ht_supported && !is_6ghz) { |
| 5220 | mlme_link_id_dbg(sdata, link_id, |
| 5221 | "HT not supported (and not on 6 GHz), limiting to legacy\n"); |
| 5222 | goto out; |
| 5223 | } |
| 5224 | |
| 5225 | /* HT is fine */ |
| 5226 | conn->mode = IEEE80211_CONN_MODE_HT; |
| 5227 | conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? |
| 5228 | IEEE80211_CONN_BW_LIMIT_40 : |
| 5229 | IEEE80211_CONN_BW_LIMIT_20; |
| 5230 | |
| 5231 | memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); |
| 5232 | ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); |
| 5233 | |
| 5234 | if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { |
| 5235 | mlme_link_id_dbg(sdata, link_id, |
| 5236 | "VHT disabled by flag, limiting to HT\n"); |
| 5237 | goto out; |
| 5238 | } |
| 5239 | |
| 5240 | if (vht_cap.vht_supported && is_5ghz) { |
| 5241 | bool have_80mhz = false; |
| 5242 | unsigned int i; |
| 5243 | |
| 5244 | if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { |
| 5245 | mlme_link_id_dbg(sdata, link_id, |
| 5246 | "no 40 MHz support on 5 GHz, limiting to HT\n"); |
| 5247 | goto out; |
| 5248 | } |
| 5249 | |
| 5250 | /* Allow VHT if at least one channel on the sband supports 80 MHz */ |
| 5251 | for (i = 0; i < sband->n_channels; i++) { |
| 5252 | if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | |
| 5253 | IEEE80211_CHAN_NO_80MHZ)) |
| 5254 | continue; |
| 5255 | |
| 5256 | have_80mhz = true; |
| 5257 | break; |
| 5258 | } |
| 5259 | |
| 5260 | if (!have_80mhz) { |
| 5261 | mlme_link_id_dbg(sdata, link_id, |
| 5262 | "no 80 MHz channel support on 5 GHz, limiting to HT\n"); |
| 5263 | goto out; |
| 5264 | } |
| 5265 | } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ |
| 5266 | mlme_link_id_dbg(sdata, link_id, |
| 5267 | "no VHT support on 5 GHz, limiting to HT\n"); |
| 5268 | goto out; |
| 5269 | } |
| 5270 | |
| 5271 | /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ |
| 5272 | if (sband->band != NL80211_BAND_2GHZ) { |
| 5273 | conn->mode = IEEE80211_CONN_MODE_VHT; |
| 5274 | conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; |
| 5275 | } |
| 5276 | |
| 5277 | if (is_5ghz && |
| 5278 | !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | |
| 5279 | IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { |
| 5280 | conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; |
| 5281 | mlme_link_id_dbg(sdata, link_id, |
| 5282 | "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); |
| 5283 | } |
| 5284 | |
| 5285 | if (req && req->flags & ASSOC_REQ_DISABLE_HE) { |
| 5286 | mlme_link_id_dbg(sdata, link_id, |
| 5287 | "HE disabled by flag, limiting to HT/VHT\n"); |
| 5288 | goto out; |
| 5289 | } |
| 5290 | |
| 5291 | he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); |
| 5292 | if (!he_cap) { |
| 5293 | WARN_ON(is_6ghz); |
| 5294 | mlme_link_id_dbg(sdata, link_id, |
| 5295 | "no HE support, limiting to HT/VHT\n"); |
| 5296 | goto out; |
| 5297 | } |
| 5298 | |
| 5299 | /* so we have HE */ |
| 5300 | conn->mode = IEEE80211_CONN_MODE_HE; |
| 5301 | |
| 5302 | /* check bandwidth */ |
| 5303 | switch (sband->band) { |
| 5304 | default: |
| 5305 | case NL80211_BAND_2GHZ: |
| 5306 | if (he_cap->he_cap_elem.phy_cap_info[0] & |
| 5307 | IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) |
| 5308 | break; |
| 5309 | conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; |
| 5310 | mlme_link_id_dbg(sdata, link_id, |
| 5311 | "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); |
| 5312 | break; |
| 5313 | case NL80211_BAND_5GHZ: |
| 5314 | if (!(he_cap->he_cap_elem.phy_cap_info[0] & |
| 5315 | IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { |
| 5316 | conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; |
| 5317 | mlme_link_id_dbg(sdata, link_id, |
| 5318 | "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); |
| 5319 | break; |
| 5320 | } |
| 5321 | if (!(he_cap->he_cap_elem.phy_cap_info[0] & |
| 5322 | IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { |
| 5323 | conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, |
| 5324 | conn->bw_limit, |
| 5325 | IEEE80211_CONN_BW_LIMIT_80); |
| 5326 | mlme_link_id_dbg(sdata, link_id, |
| 5327 | "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); |
| 5328 | } |
| 5329 | break; |
| 5330 | case NL80211_BAND_6GHZ: |
| 5331 | if (he_cap->he_cap_elem.phy_cap_info[0] & |
| 5332 | IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) |
| 5333 | break; |
| 5334 | conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, |
| 5335 | conn->bw_limit, |
| 5336 | IEEE80211_CONN_BW_LIMIT_80); |
| 5337 | mlme_link_id_dbg(sdata, link_id, |
| 5338 | "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); |
| 5339 | break; |
| 5340 | } |
| 5341 | |
| 5342 | if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { |
| 5343 | mlme_link_id_dbg(sdata, link_id, |
| 5344 | "EHT disabled by flag, limiting to HE\n"); |
| 5345 | goto out; |
| 5346 | } |
| 5347 | |
| 5348 | eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); |
| 5349 | if (!eht_cap) { |
| 5350 | mlme_link_id_dbg(sdata, link_id, |
| 5351 | "no EHT support, limiting to HE\n"); |
| 5352 | goto out; |
| 5353 | } |
| 5354 | |
| 5355 | /* we have EHT */ |
| 5356 | |
| 5357 | conn->mode = IEEE80211_CONN_MODE_EHT; |
| 5358 | |
| 5359 | /* check bandwidth */ |
| 5360 | if (is_6ghz && |
| 5361 | eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) |
| 5362 | conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; |
| 5363 | else if (is_6ghz) |
| 5364 | mlme_link_id_dbg(sdata, link_id, |
| 5365 | "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); |
| 5366 | |
| 5367 | out: |
| 5368 | mlme_link_id_dbg(sdata, link_id, |
| 5369 | "determined local STA to be %s, BW limited to %d MHz\n", |
| 5370 | ieee80211_conn_mode_str(conn->mode), |
| 5371 | 20 * (1 << conn->bw_limit)); |
| 5372 | } |
| 5373 | |
| 5374 | static void |
| 5375 | ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, |
| 5376 | struct ieee80211_supported_band *sband, |
| 5377 | struct cfg80211_auth_request *req, |
| 5378 | bool wmm_used, |
| 5379 | struct ieee80211_conn_settings *conn) |
| 5380 | { |
| 5381 | ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, |
| 5382 | req->link_id > 0 ? req->link_id : 0, |
| 5383 | conn); |
| 5384 | } |
| 5385 | |
| 5386 | static void |
| 5387 | ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, |
| 5388 | struct ieee80211_supported_band *sband, |
| 5389 | struct cfg80211_assoc_request *req, |
| 5390 | bool wmm_used, int link_id, |
| 5391 | struct ieee80211_conn_settings *conn) |
| 5392 | { |
| 5393 | struct ieee80211_conn_settings tmp; |
| 5394 | |
| 5395 | WARN_ON(!req); |
| 5396 | |
| 5397 | ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, |
| 5398 | &tmp); |
| 5399 | |
| 5400 | conn->mode = min_t(enum ieee80211_conn_mode, |
| 5401 | conn->mode, tmp.mode); |
| 5402 | conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, |
| 5403 | conn->bw_limit, tmp.bw_limit); |
| 5404 | } |
| 5405 | |
| 5406 | static enum ieee80211_ap_reg_power |
| 5407 | ieee80211_ap_power_type(u8 control) |
| 5408 | { |
| 5409 | switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { |
| 5410 | case IEEE80211_6GHZ_CTRL_REG_LPI_AP: |
| 5411 | case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: |
| 5412 | return IEEE80211_REG_LPI_AP; |
| 5413 | case IEEE80211_6GHZ_CTRL_REG_SP_AP: |
| 5414 | case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: |
| 5415 | return IEEE80211_REG_SP_AP; |
| 5416 | case IEEE80211_6GHZ_CTRL_REG_VLP_AP: |
| 5417 | return IEEE80211_REG_VLP_AP; |
| 5418 | default: |
| 5419 | return IEEE80211_REG_UNSET_AP; |
| 5420 | } |
| 5421 | } |
| 5422 | |
| 5423 | static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, |
| 5424 | struct ieee80211_link_data *link, |
| 5425 | int link_id, |
| 5426 | struct cfg80211_bss *cbss, bool mlo, |
| 5427 | struct ieee80211_conn_settings *conn) |
| 5428 | { |
| 5429 | struct ieee80211_local *local = sdata->local; |
| 5430 | bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; |
| 5431 | struct ieee80211_chan_req chanreq = {}; |
| 5432 | struct cfg80211_chan_def ap_chandef; |
| 5433 | struct ieee802_11_elems *elems; |
| 5434 | int ret; |
| 5435 | |
| 5436 | lockdep_assert_wiphy(local->hw.wiphy); |
| 5437 | |
| 5438 | rcu_read_lock(); |
| 5439 | elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, |
| 5440 | &chanreq, &ap_chandef); |
| 5441 | |
| 5442 | if (IS_ERR(elems)) { |
| 5443 | rcu_read_unlock(); |
| 5444 | return PTR_ERR(elems); |
| 5445 | } |
| 5446 | |
| 5447 | if (mlo && !elems->ml_basic) { |
| 5448 | sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); |
| 5449 | rcu_read_unlock(); |
| 5450 | kfree(elems); |
| 5451 | return -EINVAL; |
| 5452 | } |
| 5453 | |
| 5454 | if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { |
| 5455 | const struct ieee80211_he_6ghz_oper *he_6ghz_oper; |
| 5456 | |
| 5457 | if (elems->pwr_constr_elem) |
| 5458 | link->conf->pwr_reduction = *elems->pwr_constr_elem; |
| 5459 | |
| 5460 | he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); |
| 5461 | if (he_6ghz_oper) |
| 5462 | link->conf->power_type = |
| 5463 | ieee80211_ap_power_type(he_6ghz_oper->control); |
| 5464 | else |
| 5465 | link_info(link, |
| 5466 | "HE 6 GHz operation missing (on %d MHz), expect issues\n", |
| 5467 | cbss->channel->center_freq); |
| 5468 | |
| 5469 | link->conf->tpe = elems->tpe; |
| 5470 | ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, |
| 5471 | &chanreq.oper); |
| 5472 | } |
| 5473 | rcu_read_unlock(); |
| 5474 | /* the element data was RCU protected so no longer valid anyway */ |
| 5475 | kfree(elems); |
| 5476 | elems = NULL; |
| 5477 | |
| 5478 | if (!link) |
| 5479 | return 0; |
| 5480 | |
| 5481 | rcu_read_lock(); |
| 5482 | link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), |
| 5483 | local->rx_chains); |
| 5484 | rcu_read_unlock(); |
| 5485 | |
| 5486 | /* |
| 5487 | * If this fails (possibly due to channel context sharing |
| 5488 | * on incompatible channels, e.g. 80+80 and 160 sharing the |
| 5489 | * same control channel) try to use a smaller bandwidth. |
| 5490 | */ |
| 5491 | ret = ieee80211_link_use_channel(link, &chanreq, |
| 5492 | IEEE80211_CHANCTX_SHARED); |
| 5493 | |
| 5494 | /* don't downgrade for 5 and 10 MHz channels, though. */ |
| 5495 | if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || |
| 5496 | chanreq.oper.width == NL80211_CHAN_WIDTH_10) |
| 5497 | return ret; |
| 5498 | |
| 5499 | while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { |
| 5500 | ieee80211_chanreq_downgrade(&chanreq, conn); |
| 5501 | |
| 5502 | ret = ieee80211_link_use_channel(link, &chanreq, |
| 5503 | IEEE80211_CHANCTX_SHARED); |
| 5504 | } |
| 5505 | |
| 5506 | return ret; |
| 5507 | } |
| 5508 | |
| 5509 | static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, |
| 5510 | u8 *dtim_count, u8 *dtim_period) |
| 5511 | { |
| 5512 | const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); |
| 5513 | const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, |
| 5514 | ies->len); |
| 5515 | const struct ieee80211_tim_ie *tim = NULL; |
| 5516 | const struct ieee80211_bssid_index *idx; |
| 5517 | bool valid = tim_ie && tim_ie[1] >= 2; |
| 5518 | |
| 5519 | if (valid) |
| 5520 | tim = (void *)(tim_ie + 2); |
| 5521 | |
| 5522 | if (dtim_count) |
| 5523 | *dtim_count = valid ? tim->dtim_count : 0; |
| 5524 | |
| 5525 | if (dtim_period) |
| 5526 | *dtim_period = valid ? tim->dtim_period : 0; |
| 5527 | |
| 5528 | /* Check if value is overridden by non-transmitted profile */ |
| 5529 | if (!idx_ie || idx_ie[1] < 3) |
| 5530 | return valid; |
| 5531 | |
| 5532 | idx = (void *)(idx_ie + 2); |
| 5533 | |
| 5534 | if (dtim_count) |
| 5535 | *dtim_count = idx->dtim_count; |
| 5536 | |
| 5537 | if (dtim_period) |
| 5538 | *dtim_period = idx->dtim_period; |
| 5539 | |
| 5540 | return true; |
| 5541 | } |
| 5542 | |
| 5543 | static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, |
| 5544 | struct ieee80211_mgmt *mgmt, |
| 5545 | struct ieee802_11_elems *elems, |
| 5546 | const u8 *elem_start, unsigned int elem_len) |
| 5547 | { |
| 5548 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 5549 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; |
| 5550 | struct ieee80211_local *local = sdata->local; |
| 5551 | unsigned int link_id; |
| 5552 | struct sta_info *sta; |
| 5553 | u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; |
| 5554 | u16 valid_links = 0, dormant_links = 0; |
| 5555 | int err; |
| 5556 | |
| 5557 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 5558 | /* |
| 5559 | * station info was already allocated and inserted before |
| 5560 | * the association and should be available to us |
| 5561 | */ |
| 5562 | sta = sta_info_get(sdata, assoc_data->ap_addr); |
| 5563 | if (WARN_ON(!sta)) |
| 5564 | goto out_err; |
| 5565 | |
| 5566 | sta->sta.spp_amsdu = assoc_data->spp_amsdu; |
| 5567 | |
| 5568 | if (ieee80211_vif_is_mld(&sdata->vif)) { |
| 5569 | for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { |
| 5570 | if (!assoc_data->link[link_id].bss) |
| 5571 | continue; |
| 5572 | |
| 5573 | valid_links |= BIT(link_id); |
| 5574 | if (assoc_data->link[link_id].disabled) |
| 5575 | dormant_links |= BIT(link_id); |
| 5576 | |
| 5577 | if (link_id != assoc_data->assoc_link_id) { |
| 5578 | err = ieee80211_sta_allocate_link(sta, link_id); |
| 5579 | if (err) |
| 5580 | goto out_err; |
| 5581 | } |
| 5582 | } |
| 5583 | |
| 5584 | ieee80211_vif_set_links(sdata, valid_links, dormant_links); |
| 5585 | } |
| 5586 | |
| 5587 | for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { |
| 5588 | struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; |
| 5589 | struct ieee80211_link_data *link; |
| 5590 | struct link_sta_info *link_sta; |
| 5591 | |
| 5592 | if (!cbss) |
| 5593 | continue; |
| 5594 | |
| 5595 | link = sdata_dereference(sdata->link[link_id], sdata); |
| 5596 | if (WARN_ON(!link)) |
| 5597 | goto out_err; |
| 5598 | |
| 5599 | if (ieee80211_vif_is_mld(&sdata->vif)) |
| 5600 | link_info(link, |
| 5601 | "local address %pM, AP link address %pM%s\n", |
| 5602 | link->conf->addr, |
| 5603 | assoc_data->link[link_id].bss->bssid, |
| 5604 | link_id == assoc_data->assoc_link_id ? |
| 5605 | " (assoc)" : ""); |
| 5606 | |
| 5607 | link_sta = rcu_dereference_protected(sta->link[link_id], |
| 5608 | lockdep_is_held(&local->hw.wiphy->mtx)); |
| 5609 | if (WARN_ON(!link_sta)) |
| 5610 | goto out_err; |
| 5611 | |
| 5612 | if (!link->u.mgd.have_beacon) { |
| 5613 | const struct cfg80211_bss_ies *ies; |
| 5614 | |
| 5615 | rcu_read_lock(); |
| 5616 | ies = rcu_dereference(cbss->beacon_ies); |
| 5617 | if (ies) |
| 5618 | link->u.mgd.have_beacon = true; |
| 5619 | else |
| 5620 | ies = rcu_dereference(cbss->ies); |
| 5621 | ieee80211_get_dtim(ies, |
| 5622 | &link->conf->sync_dtim_count, |
| 5623 | &link->u.mgd.dtim_period); |
| 5624 | link->conf->beacon_int = cbss->beacon_interval; |
| 5625 | rcu_read_unlock(); |
| 5626 | } |
| 5627 | |
| 5628 | link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; |
| 5629 | |
| 5630 | if (link_id != assoc_data->assoc_link_id) { |
| 5631 | link->u.mgd.conn = assoc_data->link[link_id].conn; |
| 5632 | |
| 5633 | err = ieee80211_prep_channel(sdata, link, link_id, cbss, |
| 5634 | true, &link->u.mgd.conn); |
| 5635 | if (err) { |
| 5636 | link_info(link, "prep_channel failed\n"); |
| 5637 | goto out_err; |
| 5638 | } |
| 5639 | } |
| 5640 | |
| 5641 | err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, |
| 5642 | assoc_data->link[link_id].bss); |
| 5643 | if (err) |
| 5644 | goto out_err; |
| 5645 | |
| 5646 | if (!ieee80211_assoc_config_link(link, link_sta, |
| 5647 | assoc_data->link[link_id].bss, |
| 5648 | mgmt, elem_start, elem_len, |
| 5649 | &changed[link_id])) |
| 5650 | goto out_err; |
| 5651 | |
| 5652 | if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { |
| 5653 | valid_links &= ~BIT(link_id); |
| 5654 | ieee80211_sta_remove_link(sta, link_id); |
| 5655 | continue; |
| 5656 | } |
| 5657 | |
| 5658 | if (link_id != assoc_data->assoc_link_id) { |
| 5659 | err = ieee80211_sta_activate_link(sta, link_id); |
| 5660 | if (err) |
| 5661 | goto out_err; |
| 5662 | } |
| 5663 | } |
| 5664 | |
| 5665 | /* links might have changed due to rejected ones, set them again */ |
| 5666 | ieee80211_vif_set_links(sdata, valid_links, dormant_links); |
| 5667 | |
| 5668 | rate_control_rate_init(sta); |
| 5669 | |
| 5670 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { |
| 5671 | set_sta_flag(sta, WLAN_STA_MFP); |
| 5672 | sta->sta.mfp = true; |
| 5673 | } else { |
| 5674 | sta->sta.mfp = false; |
| 5675 | } |
| 5676 | |
| 5677 | ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, |
| 5678 | elems->ext_capab_len); |
| 5679 | |
| 5680 | sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && |
| 5681 | local->hw.queues >= IEEE80211_NUM_ACS; |
| 5682 | |
| 5683 | err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); |
| 5684 | if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) |
| 5685 | err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); |
| 5686 | if (err) { |
| 5687 | sdata_info(sdata, |
| 5688 | "failed to move station %pM to desired state\n", |
| 5689 | sta->sta.addr); |
| 5690 | WARN_ON(__sta_info_destroy(sta)); |
| 5691 | goto out_err; |
| 5692 | } |
| 5693 | |
| 5694 | if (sdata->wdev.use_4addr) |
| 5695 | drv_sta_set_4addr(local, sdata, &sta->sta, true); |
| 5696 | |
| 5697 | ieee80211_set_associated(sdata, assoc_data, changed); |
| 5698 | |
| 5699 | /* |
| 5700 | * If we're using 4-addr mode, let the AP know that we're |
| 5701 | * doing so, so that it can create the STA VLAN on its side |
| 5702 | */ |
| 5703 | if (ifmgd->use_4addr) |
| 5704 | ieee80211_send_4addr_nullfunc(local, sdata); |
| 5705 | |
| 5706 | /* |
| 5707 | * Start timer to probe the connection to the AP now. |
| 5708 | * Also start the timer that will detect beacon loss. |
| 5709 | */ |
| 5710 | ieee80211_sta_reset_beacon_monitor(sdata); |
| 5711 | ieee80211_sta_reset_conn_monitor(sdata); |
| 5712 | |
| 5713 | return true; |
| 5714 | out_err: |
| 5715 | eth_zero_addr(sdata->vif.cfg.ap_addr); |
| 5716 | return false; |
| 5717 | } |
| 5718 | |
| 5719 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
| 5720 | struct ieee80211_mgmt *mgmt, |
| 5721 | size_t len) |
| 5722 | { |
| 5723 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 5724 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; |
| 5725 | u16 capab_info, status_code, aid; |
| 5726 | struct ieee80211_elems_parse_params parse_params = { |
| 5727 | .bss = NULL, |
| 5728 | .link_id = -1, |
| 5729 | .from_ap = true, |
| 5730 | }; |
| 5731 | struct ieee802_11_elems *elems; |
| 5732 | int ac; |
| 5733 | const u8 *elem_start; |
| 5734 | unsigned int elem_len; |
| 5735 | bool reassoc; |
| 5736 | struct ieee80211_event event = { |
| 5737 | .type = MLME_EVENT, |
| 5738 | .u.mlme.data = ASSOC_EVENT, |
| 5739 | }; |
| 5740 | struct ieee80211_prep_tx_info info = {}; |
| 5741 | struct cfg80211_rx_assoc_resp_data resp = { |
| 5742 | .uapsd_queues = -1, |
| 5743 | }; |
| 5744 | u8 ap_mld_addr[ETH_ALEN] __aligned(2); |
| 5745 | unsigned int link_id; |
| 5746 | |
| 5747 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 5748 | |
| 5749 | if (!assoc_data) |
| 5750 | return; |
| 5751 | |
| 5752 | parse_params.mode = |
| 5753 | assoc_data->link[assoc_data->assoc_link_id].conn.mode; |
| 5754 | |
| 5755 | if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || |
| 5756 | !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) |
| 5757 | return; |
| 5758 | |
| 5759 | /* |
| 5760 | * AssocResp and ReassocResp have identical structure, so process both |
| 5761 | * of them in this function. |
| 5762 | */ |
| 5763 | |
| 5764 | if (len < 24 + 6) |
| 5765 | return; |
| 5766 | |
| 5767 | reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); |
| 5768 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
| 5769 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); |
| 5770 | if (assoc_data->s1g) |
| 5771 | elem_start = mgmt->u.s1g_assoc_resp.variable; |
| 5772 | else |
| 5773 | elem_start = mgmt->u.assoc_resp.variable; |
| 5774 | |
| 5775 | /* |
| 5776 | * Note: this may not be perfect, AP might misbehave - if |
| 5777 | * anyone needs to rely on perfect complete notification |
| 5778 | * with the exact right subtype, then we need to track what |
| 5779 | * we actually transmitted. |
| 5780 | */ |
| 5781 | info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : |
| 5782 | IEEE80211_STYPE_ASSOC_REQ; |
| 5783 | |
| 5784 | if (assoc_data->fils_kek_len && |
| 5785 | fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) |
| 5786 | return; |
| 5787 | |
| 5788 | elem_len = len - (elem_start - (u8 *)mgmt); |
| 5789 | parse_params.start = elem_start; |
| 5790 | parse_params.len = elem_len; |
| 5791 | elems = ieee802_11_parse_elems_full(&parse_params); |
| 5792 | if (!elems) |
| 5793 | goto notify_driver; |
| 5794 | |
| 5795 | if (elems->aid_resp) |
| 5796 | aid = le16_to_cpu(elems->aid_resp->aid); |
| 5797 | else if (assoc_data->s1g) |
| 5798 | aid = 0; /* TODO */ |
| 5799 | else |
| 5800 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
| 5801 | |
| 5802 | /* |
| 5803 | * The 5 MSB of the AID field are reserved |
| 5804 | * (802.11-2016 9.4.1.8 AID field) |
| 5805 | */ |
| 5806 | aid &= 0x7ff; |
| 5807 | |
| 5808 | sdata_info(sdata, |
| 5809 | "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", |
| 5810 | reassoc ? "Rea" : "A", assoc_data->ap_addr, |
| 5811 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
| 5812 | |
| 5813 | ifmgd->broken_ap = false; |
| 5814 | |
| 5815 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && |
| 5816 | elems->timeout_int && |
| 5817 | elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { |
| 5818 | u32 tu, ms; |
| 5819 | |
| 5820 | cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, |
| 5821 | le32_to_cpu(elems->timeout_int->value)); |
| 5822 | |
| 5823 | tu = le32_to_cpu(elems->timeout_int->value); |
| 5824 | ms = tu * 1024 / 1000; |
| 5825 | sdata_info(sdata, |
| 5826 | "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", |
| 5827 | assoc_data->ap_addr, tu, ms); |
| 5828 | assoc_data->timeout = jiffies + msecs_to_jiffies(ms); |
| 5829 | assoc_data->timeout_started = true; |
| 5830 | assoc_data->comeback = true; |
| 5831 | if (ms > IEEE80211_ASSOC_TIMEOUT) |
| 5832 | run_again(sdata, assoc_data->timeout); |
| 5833 | goto notify_driver; |
| 5834 | } |
| 5835 | |
| 5836 | if (status_code != WLAN_STATUS_SUCCESS) { |
| 5837 | sdata_info(sdata, "%pM denied association (code=%d)\n", |
| 5838 | assoc_data->ap_addr, status_code); |
| 5839 | event.u.mlme.status = MLME_DENIED; |
| 5840 | event.u.mlme.reason = status_code; |
| 5841 | drv_event_callback(sdata->local, sdata, &event); |
| 5842 | } else { |
| 5843 | if (aid == 0 || aid > IEEE80211_MAX_AID) { |
| 5844 | sdata_info(sdata, |
| 5845 | "invalid AID value %d (out of range), turn off PS\n", |
| 5846 | aid); |
| 5847 | aid = 0; |
| 5848 | ifmgd->broken_ap = true; |
| 5849 | } |
| 5850 | |
| 5851 | if (ieee80211_vif_is_mld(&sdata->vif)) { |
| 5852 | struct ieee80211_mle_basic_common_info *common; |
| 5853 | |
| 5854 | if (!elems->ml_basic) { |
| 5855 | sdata_info(sdata, |
| 5856 | "MLO association with %pM but no (basic) multi-link element in response!\n", |
| 5857 | assoc_data->ap_addr); |
| 5858 | goto abandon_assoc; |
| 5859 | } |
| 5860 | |
| 5861 | common = (void *)elems->ml_basic->variable; |
| 5862 | |
| 5863 | if (memcmp(assoc_data->ap_addr, |
| 5864 | common->mld_mac_addr, ETH_ALEN)) { |
| 5865 | sdata_info(sdata, |
| 5866 | "AP MLD MAC address mismatch: got %pM expected %pM\n", |
| 5867 | common->mld_mac_addr, |
| 5868 | assoc_data->ap_addr); |
| 5869 | goto abandon_assoc; |
| 5870 | } |
| 5871 | |
| 5872 | sdata->vif.cfg.eml_cap = |
| 5873 | ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); |
| 5874 | sdata->vif.cfg.eml_med_sync_delay = |
| 5875 | ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); |
| 5876 | sdata->vif.cfg.mld_capa_op = |
| 5877 | ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); |
| 5878 | } |
| 5879 | |
| 5880 | sdata->vif.cfg.aid = aid; |
| 5881 | |
| 5882 | if (!ieee80211_assoc_success(sdata, mgmt, elems, |
| 5883 | elem_start, elem_len)) { |
| 5884 | /* oops -- internal error -- send timeout for now */ |
| 5885 | ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); |
| 5886 | goto notify_driver; |
| 5887 | } |
| 5888 | event.u.mlme.status = MLME_SUCCESS; |
| 5889 | drv_event_callback(sdata->local, sdata, &event); |
| 5890 | sdata_info(sdata, "associated\n"); |
| 5891 | |
| 5892 | info.success = 1; |
| 5893 | } |
| 5894 | |
| 5895 | for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { |
| 5896 | struct ieee80211_link_data *link; |
| 5897 | |
| 5898 | if (!assoc_data->link[link_id].bss) |
| 5899 | continue; |
| 5900 | |
| 5901 | resp.links[link_id].bss = assoc_data->link[link_id].bss; |
| 5902 | ether_addr_copy(resp.links[link_id].addr, |
| 5903 | assoc_data->link[link_id].addr); |
| 5904 | resp.links[link_id].status = assoc_data->link[link_id].status; |
| 5905 | |
| 5906 | link = sdata_dereference(sdata->link[link_id], sdata); |
| 5907 | if (!link) |
| 5908 | continue; |
| 5909 | |
| 5910 | /* get uapsd queues configuration - same for all links */ |
| 5911 | resp.uapsd_queues = 0; |
| 5912 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) |
| 5913 | if (link->tx_conf[ac].uapsd) |
| 5914 | resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; |
| 5915 | } |
| 5916 | |
| 5917 | if (ieee80211_vif_is_mld(&sdata->vif)) { |
| 5918 | ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); |
| 5919 | resp.ap_mld_addr = ap_mld_addr; |
| 5920 | } |
| 5921 | |
| 5922 | ieee80211_destroy_assoc_data(sdata, |
| 5923 | status_code == WLAN_STATUS_SUCCESS ? |
| 5924 | ASSOC_SUCCESS : |
| 5925 | ASSOC_REJECTED); |
| 5926 | |
| 5927 | resp.buf = (u8 *)mgmt; |
| 5928 | resp.len = len; |
| 5929 | resp.req_ies = ifmgd->assoc_req_ies; |
| 5930 | resp.req_ies_len = ifmgd->assoc_req_ies_len; |
| 5931 | cfg80211_rx_assoc_resp(sdata->dev, &resp); |
| 5932 | notify_driver: |
| 5933 | drv_mgd_complete_tx(sdata->local, sdata, &info); |
| 5934 | kfree(elems); |
| 5935 | return; |
| 5936 | abandon_assoc: |
| 5937 | ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); |
| 5938 | goto notify_driver; |
| 5939 | } |
| 5940 | |
| 5941 | static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, |
| 5942 | struct ieee80211_mgmt *mgmt, size_t len, |
| 5943 | struct ieee80211_rx_status *rx_status) |
| 5944 | { |
| 5945 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 5946 | struct ieee80211_local *local = sdata->local; |
| 5947 | struct ieee80211_bss *bss; |
| 5948 | struct ieee80211_channel *channel; |
| 5949 | |
| 5950 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 5951 | |
| 5952 | channel = ieee80211_get_channel_khz(local->hw.wiphy, |
| 5953 | ieee80211_rx_status_to_khz(rx_status)); |
| 5954 | if (!channel) |
| 5955 | return; |
| 5956 | |
| 5957 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); |
| 5958 | if (bss) { |
| 5959 | link->conf->beacon_rate = bss->beacon_rate; |
| 5960 | ieee80211_rx_bss_put(local, bss); |
| 5961 | } |
| 5962 | } |
| 5963 | |
| 5964 | |
| 5965 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, |
| 5966 | struct sk_buff *skb) |
| 5967 | { |
| 5968 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 5969 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
| 5970 | struct ieee80211_if_managed *ifmgd; |
| 5971 | struct ieee80211_rx_status *rx_status = (void *) skb->cb; |
| 5972 | struct ieee80211_channel *channel; |
| 5973 | size_t baselen, len = skb->len; |
| 5974 | |
| 5975 | ifmgd = &sdata->u.mgd; |
| 5976 | |
| 5977 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 5978 | |
| 5979 | /* |
| 5980 | * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: |
| 5981 | * "If a 6 GHz AP receives a Probe Request frame and responds with |
| 5982 | * a Probe Response frame [..], the Address 1 field of the Probe |
| 5983 | * Response frame shall be set to the broadcast address [..]" |
| 5984 | * So, on 6GHz band we should also accept broadcast responses. |
| 5985 | */ |
| 5986 | channel = ieee80211_get_channel(sdata->local->hw.wiphy, |
| 5987 | rx_status->freq); |
| 5988 | if (!channel) |
| 5989 | return; |
| 5990 | |
| 5991 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && |
| 5992 | (channel->band != NL80211_BAND_6GHZ || |
| 5993 | !is_broadcast_ether_addr(mgmt->da))) |
| 5994 | return; /* ignore ProbeResp to foreign address */ |
| 5995 | |
| 5996 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
| 5997 | if (baselen > len) |
| 5998 | return; |
| 5999 | |
| 6000 | ieee80211_rx_bss_info(link, mgmt, len, rx_status); |
| 6001 | |
| 6002 | if (ifmgd->associated && |
| 6003 | ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) |
| 6004 | ieee80211_reset_ap_probe(sdata); |
| 6005 | } |
| 6006 | |
| 6007 | /* |
| 6008 | * This is the canonical list of information elements we care about, |
| 6009 | * the filter code also gives us all changes to the Microsoft OUI |
| 6010 | * (00:50:F2) vendor IE which is used for WMM which we need to track, |
| 6011 | * as well as the DTPC IE (part of the Cisco OUI) used for signaling |
| 6012 | * changes to requested client power. |
| 6013 | * |
| 6014 | * We implement beacon filtering in software since that means we can |
| 6015 | * avoid processing the frame here and in cfg80211, and userspace |
| 6016 | * will not be able to tell whether the hardware supports it or not. |
| 6017 | * |
| 6018 | * XXX: This list needs to be dynamic -- userspace needs to be able to |
| 6019 | * add items it requires. It also needs to be able to tell us to |
| 6020 | * look out for other vendor IEs. |
| 6021 | */ |
| 6022 | static const u64 care_about_ies = |
| 6023 | (1ULL << WLAN_EID_COUNTRY) | |
| 6024 | (1ULL << WLAN_EID_ERP_INFO) | |
| 6025 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | |
| 6026 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | |
| 6027 | (1ULL << WLAN_EID_HT_CAPABILITY) | |
| 6028 | (1ULL << WLAN_EID_HT_OPERATION) | |
| 6029 | (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); |
| 6030 | |
| 6031 | static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, |
| 6032 | struct ieee80211_if_managed *ifmgd, |
| 6033 | struct ieee80211_bss_conf *bss_conf, |
| 6034 | struct ieee80211_local *local, |
| 6035 | struct ieee80211_rx_status *rx_status) |
| 6036 | { |
| 6037 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 6038 | |
| 6039 | /* Track average RSSI from the Beacon frames of the current AP */ |
| 6040 | |
| 6041 | if (!link->u.mgd.tracking_signal_avg) { |
| 6042 | link->u.mgd.tracking_signal_avg = true; |
| 6043 | ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); |
| 6044 | link->u.mgd.last_cqm_event_signal = 0; |
| 6045 | link->u.mgd.count_beacon_signal = 1; |
| 6046 | link->u.mgd.last_ave_beacon_signal = 0; |
| 6047 | } else { |
| 6048 | link->u.mgd.count_beacon_signal++; |
| 6049 | } |
| 6050 | |
| 6051 | ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, |
| 6052 | -rx_status->signal); |
| 6053 | |
| 6054 | if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && |
| 6055 | link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { |
| 6056 | int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); |
| 6057 | int last_sig = link->u.mgd.last_ave_beacon_signal; |
| 6058 | struct ieee80211_event event = { |
| 6059 | .type = RSSI_EVENT, |
| 6060 | }; |
| 6061 | |
| 6062 | /* |
| 6063 | * if signal crosses either of the boundaries, invoke callback |
| 6064 | * with appropriate parameters |
| 6065 | */ |
| 6066 | if (sig > ifmgd->rssi_max_thold && |
| 6067 | (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { |
| 6068 | link->u.mgd.last_ave_beacon_signal = sig; |
| 6069 | event.u.rssi.data = RSSI_EVENT_HIGH; |
| 6070 | drv_event_callback(local, sdata, &event); |
| 6071 | } else if (sig < ifmgd->rssi_min_thold && |
| 6072 | (last_sig >= ifmgd->rssi_max_thold || |
| 6073 | last_sig == 0)) { |
| 6074 | link->u.mgd.last_ave_beacon_signal = sig; |
| 6075 | event.u.rssi.data = RSSI_EVENT_LOW; |
| 6076 | drv_event_callback(local, sdata, &event); |
| 6077 | } |
| 6078 | } |
| 6079 | |
| 6080 | if (bss_conf->cqm_rssi_thold && |
| 6081 | link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && |
| 6082 | !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { |
| 6083 | int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); |
| 6084 | int last_event = link->u.mgd.last_cqm_event_signal; |
| 6085 | int thold = bss_conf->cqm_rssi_thold; |
| 6086 | int hyst = bss_conf->cqm_rssi_hyst; |
| 6087 | |
| 6088 | if (sig < thold && |
| 6089 | (last_event == 0 || sig < last_event - hyst)) { |
| 6090 | link->u.mgd.last_cqm_event_signal = sig; |
| 6091 | ieee80211_cqm_rssi_notify( |
| 6092 | &sdata->vif, |
| 6093 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, |
| 6094 | sig, GFP_KERNEL); |
| 6095 | } else if (sig > thold && |
| 6096 | (last_event == 0 || sig > last_event + hyst)) { |
| 6097 | link->u.mgd.last_cqm_event_signal = sig; |
| 6098 | ieee80211_cqm_rssi_notify( |
| 6099 | &sdata->vif, |
| 6100 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, |
| 6101 | sig, GFP_KERNEL); |
| 6102 | } |
| 6103 | } |
| 6104 | |
| 6105 | if (bss_conf->cqm_rssi_low && |
| 6106 | link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { |
| 6107 | int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); |
| 6108 | int last_event = link->u.mgd.last_cqm_event_signal; |
| 6109 | int low = bss_conf->cqm_rssi_low; |
| 6110 | int high = bss_conf->cqm_rssi_high; |
| 6111 | |
| 6112 | if (sig < low && |
| 6113 | (last_event == 0 || last_event >= low)) { |
| 6114 | link->u.mgd.last_cqm_event_signal = sig; |
| 6115 | ieee80211_cqm_rssi_notify( |
| 6116 | &sdata->vif, |
| 6117 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, |
| 6118 | sig, GFP_KERNEL); |
| 6119 | } else if (sig > high && |
| 6120 | (last_event == 0 || last_event <= high)) { |
| 6121 | link->u.mgd.last_cqm_event_signal = sig; |
| 6122 | ieee80211_cqm_rssi_notify( |
| 6123 | &sdata->vif, |
| 6124 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, |
| 6125 | sig, GFP_KERNEL); |
| 6126 | } |
| 6127 | } |
| 6128 | } |
| 6129 | |
| 6130 | static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, |
| 6131 | struct cfg80211_bss *bss) |
| 6132 | { |
| 6133 | if (ether_addr_equal(tx_bssid, bss->bssid)) |
| 6134 | return true; |
| 6135 | if (!bss->transmitted_bss) |
| 6136 | return false; |
| 6137 | return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); |
| 6138 | } |
| 6139 | |
| 6140 | static void ieee80211_ml_reconf_work(struct wiphy *wiphy, |
| 6141 | struct wiphy_work *work) |
| 6142 | { |
| 6143 | struct ieee80211_sub_if_data *sdata = |
| 6144 | container_of(work, struct ieee80211_sub_if_data, |
| 6145 | u.mgd.ml_reconf_work.work); |
| 6146 | u16 new_valid_links, new_active_links, new_dormant_links; |
| 6147 | int ret; |
| 6148 | |
| 6149 | if (!sdata->u.mgd.removed_links) |
| 6150 | return; |
| 6151 | |
| 6152 | sdata_info(sdata, |
| 6153 | "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", |
| 6154 | sdata->vif.valid_links, sdata->u.mgd.removed_links); |
| 6155 | |
| 6156 | new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; |
| 6157 | if (new_valid_links == sdata->vif.valid_links) |
| 6158 | return; |
| 6159 | |
| 6160 | if (!new_valid_links || |
| 6161 | !(new_valid_links & ~sdata->vif.dormant_links)) { |
| 6162 | sdata_info(sdata, "No valid links after reconfiguration\n"); |
| 6163 | ret = -EINVAL; |
| 6164 | goto out; |
| 6165 | } |
| 6166 | |
| 6167 | new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; |
| 6168 | if (new_active_links != sdata->vif.active_links) { |
| 6169 | if (!new_active_links) |
| 6170 | new_active_links = |
| 6171 | BIT(ffs(new_valid_links & |
| 6172 | ~sdata->vif.dormant_links) - 1); |
| 6173 | |
| 6174 | ret = ieee80211_set_active_links(&sdata->vif, new_active_links); |
| 6175 | if (ret) { |
| 6176 | sdata_info(sdata, |
| 6177 | "Failed setting active links\n"); |
| 6178 | goto out; |
| 6179 | } |
| 6180 | } |
| 6181 | |
| 6182 | new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; |
| 6183 | |
| 6184 | ret = ieee80211_vif_set_links(sdata, new_valid_links, |
| 6185 | new_dormant_links); |
| 6186 | if (ret) |
| 6187 | sdata_info(sdata, "Failed setting valid links\n"); |
| 6188 | |
| 6189 | ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); |
| 6190 | |
| 6191 | out: |
| 6192 | if (!ret) |
| 6193 | cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); |
| 6194 | else |
| 6195 | __ieee80211_disconnect(sdata); |
| 6196 | |
| 6197 | sdata->u.mgd.removed_links = 0; |
| 6198 | } |
| 6199 | |
| 6200 | static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, |
| 6201 | struct ieee802_11_elems *elems) |
| 6202 | { |
| 6203 | const struct element *sub; |
| 6204 | unsigned long removed_links = 0; |
| 6205 | u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; |
| 6206 | u8 link_id; |
| 6207 | u32 delay; |
| 6208 | |
| 6209 | if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) |
| 6210 | return; |
| 6211 | |
| 6212 | /* Directly parse the sub elements as the common information doesn't |
| 6213 | * hold any useful information. |
| 6214 | */ |
| 6215 | for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, |
| 6216 | elems->ml_reconf_len) { |
| 6217 | struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; |
| 6218 | u8 *pos = prof->variable; |
| 6219 | u16 control; |
| 6220 | |
| 6221 | if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) |
| 6222 | continue; |
| 6223 | |
| 6224 | if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, |
| 6225 | sub->datalen)) |
| 6226 | return; |
| 6227 | |
| 6228 | control = le16_to_cpu(prof->control); |
| 6229 | link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; |
| 6230 | |
| 6231 | removed_links |= BIT(link_id); |
| 6232 | |
| 6233 | /* the MAC address should not be included, but handle it */ |
| 6234 | if (control & |
| 6235 | IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) |
| 6236 | pos += 6; |
| 6237 | |
| 6238 | /* According to Draft P802.11be_D3.0, the control should |
| 6239 | * include the AP Removal Timer present. If the AP Removal Timer |
| 6240 | * is not present assume immediate removal. |
| 6241 | */ |
| 6242 | if (control & |
| 6243 | IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) |
| 6244 | link_removal_timeout[link_id] = get_unaligned_le16(pos); |
| 6245 | } |
| 6246 | |
| 6247 | removed_links &= sdata->vif.valid_links; |
| 6248 | if (!removed_links) { |
| 6249 | /* In case the removal was cancelled, abort it */ |
| 6250 | if (sdata->u.mgd.removed_links) { |
| 6251 | sdata->u.mgd.removed_links = 0; |
| 6252 | wiphy_delayed_work_cancel(sdata->local->hw.wiphy, |
| 6253 | &sdata->u.mgd.ml_reconf_work); |
| 6254 | } |
| 6255 | return; |
| 6256 | } |
| 6257 | |
| 6258 | delay = 0; |
| 6259 | for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { |
| 6260 | struct ieee80211_bss_conf *link_conf = |
| 6261 | sdata_dereference(sdata->vif.link_conf[link_id], sdata); |
| 6262 | u32 link_delay; |
| 6263 | |
| 6264 | if (!link_conf) { |
| 6265 | removed_links &= ~BIT(link_id); |
| 6266 | continue; |
| 6267 | } |
| 6268 | |
| 6269 | if (link_removal_timeout[link_id] < 1) |
| 6270 | link_delay = 0; |
| 6271 | else |
| 6272 | link_delay = link_conf->beacon_int * |
| 6273 | (link_removal_timeout[link_id] - 1); |
| 6274 | |
| 6275 | if (!delay) |
| 6276 | delay = link_delay; |
| 6277 | else |
| 6278 | delay = min(delay, link_delay); |
| 6279 | } |
| 6280 | |
| 6281 | sdata->u.mgd.removed_links = removed_links; |
| 6282 | wiphy_delayed_work_queue(sdata->local->hw.wiphy, |
| 6283 | &sdata->u.mgd.ml_reconf_work, |
| 6284 | TU_TO_JIFFIES(delay)); |
| 6285 | } |
| 6286 | |
| 6287 | static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, |
| 6288 | u16 active_links, u16 dormant_links, |
| 6289 | u16 suspended_links) |
| 6290 | { |
| 6291 | u64 changed = 0; |
| 6292 | int ret; |
| 6293 | |
| 6294 | if (!active_links) { |
| 6295 | ret = -EINVAL; |
| 6296 | goto out; |
| 6297 | } |
| 6298 | |
| 6299 | /* If there is an active negotiated TTLM, it should be discarded by |
| 6300 | * the new negotiated/advertised TTLM. |
| 6301 | */ |
| 6302 | if (sdata->vif.neg_ttlm.valid) { |
| 6303 | memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); |
| 6304 | sdata->vif.suspended_links = 0; |
| 6305 | changed = BSS_CHANGED_MLD_TTLM; |
| 6306 | } |
| 6307 | |
| 6308 | if (sdata->vif.active_links != active_links) { |
| 6309 | /* usable links are affected when active_links are changed, |
| 6310 | * so notify the driver about the status change |
| 6311 | */ |
| 6312 | changed |= BSS_CHANGED_MLD_VALID_LINKS; |
| 6313 | active_links &= sdata->vif.active_links; |
| 6314 | if (!active_links) |
| 6315 | active_links = |
| 6316 | BIT(__ffs(sdata->vif.valid_links & |
| 6317 | ~dormant_links)); |
| 6318 | ret = ieee80211_set_active_links(&sdata->vif, active_links); |
| 6319 | if (ret) { |
| 6320 | sdata_info(sdata, "Failed to set TTLM active links\n"); |
| 6321 | goto out; |
| 6322 | } |
| 6323 | } |
| 6324 | |
| 6325 | ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, |
| 6326 | dormant_links); |
| 6327 | if (ret) { |
| 6328 | sdata_info(sdata, "Failed to set TTLM dormant links\n"); |
| 6329 | goto out; |
| 6330 | } |
| 6331 | |
| 6332 | sdata->vif.suspended_links = suspended_links; |
| 6333 | if (sdata->vif.suspended_links) |
| 6334 | changed |= BSS_CHANGED_MLD_TTLM; |
| 6335 | |
| 6336 | ieee80211_vif_cfg_change_notify(sdata, changed); |
| 6337 | |
| 6338 | out: |
| 6339 | if (ret) |
| 6340 | ieee80211_disconnect(&sdata->vif, false); |
| 6341 | |
| 6342 | return ret; |
| 6343 | } |
| 6344 | |
| 6345 | static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, |
| 6346 | struct wiphy_work *work) |
| 6347 | { |
| 6348 | u16 new_active_links, new_dormant_links; |
| 6349 | struct ieee80211_sub_if_data *sdata = |
| 6350 | container_of(work, struct ieee80211_sub_if_data, |
| 6351 | u.mgd.ttlm_work.work); |
| 6352 | |
| 6353 | new_active_links = sdata->u.mgd.ttlm_info.map & |
| 6354 | sdata->vif.valid_links; |
| 6355 | new_dormant_links = ~sdata->u.mgd.ttlm_info.map & |
| 6356 | sdata->vif.valid_links; |
| 6357 | |
| 6358 | ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); |
| 6359 | if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, |
| 6360 | 0)) |
| 6361 | return; |
| 6362 | |
| 6363 | sdata->u.mgd.ttlm_info.active = true; |
| 6364 | sdata->u.mgd.ttlm_info.switch_time = 0; |
| 6365 | } |
| 6366 | |
| 6367 | static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) |
| 6368 | { |
| 6369 | if (bm_size == 1) |
| 6370 | return *data; |
| 6371 | else |
| 6372 | return get_unaligned_le16(data); |
| 6373 | } |
| 6374 | |
| 6375 | static int |
| 6376 | ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, |
| 6377 | const struct ieee80211_ttlm_elem *ttlm, |
| 6378 | struct ieee80211_adv_ttlm_info *ttlm_info) |
| 6379 | { |
| 6380 | /* The element size was already validated in |
| 6381 | * ieee80211_tid_to_link_map_size_ok() |
| 6382 | */ |
| 6383 | u8 control, link_map_presence, map_size, tid; |
| 6384 | u8 *pos; |
| 6385 | |
| 6386 | memset(ttlm_info, 0, sizeof(*ttlm_info)); |
| 6387 | pos = (void *)ttlm->optional; |
| 6388 | control = ttlm->control; |
| 6389 | |
| 6390 | if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || |
| 6391 | !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) |
| 6392 | return 0; |
| 6393 | |
| 6394 | if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != |
| 6395 | IEEE80211_TTLM_DIRECTION_BOTH) { |
| 6396 | sdata_info(sdata, "Invalid advertised T2L map direction\n"); |
| 6397 | return -EINVAL; |
| 6398 | } |
| 6399 | |
| 6400 | link_map_presence = *pos; |
| 6401 | pos++; |
| 6402 | |
| 6403 | ttlm_info->switch_time = get_unaligned_le16(pos); |
| 6404 | |
| 6405 | /* Since ttlm_info->switch_time == 0 means no switch time, bump it |
| 6406 | * by 1. |
| 6407 | */ |
| 6408 | if (!ttlm_info->switch_time) |
| 6409 | ttlm_info->switch_time = 1; |
| 6410 | |
| 6411 | pos += 2; |
| 6412 | |
| 6413 | if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { |
| 6414 | ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; |
| 6415 | pos += 3; |
| 6416 | } |
| 6417 | |
| 6418 | if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) |
| 6419 | map_size = 1; |
| 6420 | else |
| 6421 | map_size = 2; |
| 6422 | |
| 6423 | /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall |
| 6424 | * not advertise a TID-to-link mapping that does not map all TIDs to the |
| 6425 | * same link set, reject frame if not all links have mapping |
| 6426 | */ |
| 6427 | if (link_map_presence != 0xff) { |
| 6428 | sdata_info(sdata, |
| 6429 | "Invalid advertised T2L mapping presence indicator\n"); |
| 6430 | return -EINVAL; |
| 6431 | } |
| 6432 | |
| 6433 | ttlm_info->map = ieee80211_get_ttlm(map_size, pos); |
| 6434 | if (!ttlm_info->map) { |
| 6435 | sdata_info(sdata, |
| 6436 | "Invalid advertised T2L map for TID 0\n"); |
| 6437 | return -EINVAL; |
| 6438 | } |
| 6439 | |
| 6440 | pos += map_size; |
| 6441 | |
| 6442 | for (tid = 1; tid < 8; tid++) { |
| 6443 | u16 map = ieee80211_get_ttlm(map_size, pos); |
| 6444 | |
| 6445 | if (map != ttlm_info->map) { |
| 6446 | sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", |
| 6447 | tid); |
| 6448 | return -EINVAL; |
| 6449 | } |
| 6450 | |
| 6451 | pos += map_size; |
| 6452 | } |
| 6453 | return 0; |
| 6454 | } |
| 6455 | |
| 6456 | static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, |
| 6457 | struct ieee802_11_elems *elems, |
| 6458 | u64 beacon_ts) |
| 6459 | { |
| 6460 | u8 i; |
| 6461 | int ret; |
| 6462 | |
| 6463 | if (!ieee80211_vif_is_mld(&sdata->vif)) |
| 6464 | return; |
| 6465 | |
| 6466 | if (!elems->ttlm_num) { |
| 6467 | if (sdata->u.mgd.ttlm_info.switch_time) { |
| 6468 | /* if a planned TID-to-link mapping was cancelled - |
| 6469 | * abort it |
| 6470 | */ |
| 6471 | wiphy_delayed_work_cancel(sdata->local->hw.wiphy, |
| 6472 | &sdata->u.mgd.ttlm_work); |
| 6473 | } else if (sdata->u.mgd.ttlm_info.active) { |
| 6474 | /* if no TID-to-link element, set to default mapping in |
| 6475 | * which all TIDs are mapped to all setup links |
| 6476 | */ |
| 6477 | ret = ieee80211_vif_set_links(sdata, |
| 6478 | sdata->vif.valid_links, |
| 6479 | 0); |
| 6480 | if (ret) { |
| 6481 | sdata_info(sdata, "Failed setting valid/dormant links\n"); |
| 6482 | return; |
| 6483 | } |
| 6484 | ieee80211_vif_cfg_change_notify(sdata, |
| 6485 | BSS_CHANGED_MLD_VALID_LINKS); |
| 6486 | } |
| 6487 | memset(&sdata->u.mgd.ttlm_info, 0, |
| 6488 | sizeof(sdata->u.mgd.ttlm_info)); |
| 6489 | return; |
| 6490 | } |
| 6491 | |
| 6492 | for (i = 0; i < elems->ttlm_num; i++) { |
| 6493 | struct ieee80211_adv_ttlm_info ttlm_info; |
| 6494 | u32 res; |
| 6495 | |
| 6496 | res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], |
| 6497 | &ttlm_info); |
| 6498 | |
| 6499 | if (res) { |
| 6500 | __ieee80211_disconnect(sdata); |
| 6501 | return; |
| 6502 | } |
| 6503 | |
| 6504 | if (ttlm_info.switch_time) { |
| 6505 | u16 beacon_ts_tu, st_tu, delay; |
| 6506 | u32 delay_jiffies; |
| 6507 | u64 mask; |
| 6508 | |
| 6509 | /* The t2l map switch time is indicated with a partial |
| 6510 | * TSF value (bits 10 to 25), get the partial beacon TS |
| 6511 | * as well, and calc the delay to the start time. |
| 6512 | */ |
| 6513 | mask = GENMASK_ULL(25, 10); |
| 6514 | beacon_ts_tu = (beacon_ts & mask) >> 10; |
| 6515 | st_tu = ttlm_info.switch_time; |
| 6516 | delay = st_tu - beacon_ts_tu; |
| 6517 | |
| 6518 | /* |
| 6519 | * If the switch time is far in the future, then it |
| 6520 | * could also be the previous switch still being |
| 6521 | * announced. |
| 6522 | * We can simply ignore it for now, if it is a future |
| 6523 | * switch the AP will continue to announce it anyway. |
| 6524 | */ |
| 6525 | if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) |
| 6526 | return; |
| 6527 | |
| 6528 | delay_jiffies = TU_TO_JIFFIES(delay); |
| 6529 | |
| 6530 | /* Link switching can take time, so schedule it |
| 6531 | * 100ms before to be ready on time |
| 6532 | */ |
| 6533 | if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) |
| 6534 | delay_jiffies -= |
| 6535 | IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; |
| 6536 | else |
| 6537 | delay_jiffies = 0; |
| 6538 | |
| 6539 | sdata->u.mgd.ttlm_info = ttlm_info; |
| 6540 | wiphy_delayed_work_cancel(sdata->local->hw.wiphy, |
| 6541 | &sdata->u.mgd.ttlm_work); |
| 6542 | wiphy_delayed_work_queue(sdata->local->hw.wiphy, |
| 6543 | &sdata->u.mgd.ttlm_work, |
| 6544 | delay_jiffies); |
| 6545 | return; |
| 6546 | } |
| 6547 | } |
| 6548 | } |
| 6549 | |
| 6550 | static void |
| 6551 | ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, |
| 6552 | int reporting_link_id, |
| 6553 | struct ieee802_11_elems *elems) |
| 6554 | { |
| 6555 | const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; |
| 6556 | ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; |
| 6557 | const struct element *sub; |
| 6558 | const u8 *subelems; |
| 6559 | size_t subelems_len; |
| 6560 | u8 common_size; |
| 6561 | int link_id; |
| 6562 | |
| 6563 | if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) |
| 6564 | return; |
| 6565 | |
| 6566 | common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); |
| 6567 | subelems = (u8 *)elems->ml_basic + common_size; |
| 6568 | subelems_len = elems->ml_basic_len - common_size; |
| 6569 | |
| 6570 | for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, |
| 6571 | subelems, subelems_len) { |
| 6572 | struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; |
| 6573 | struct ieee80211_link_data *link; |
| 6574 | ssize_t len; |
| 6575 | |
| 6576 | if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, |
| 6577 | sub->datalen)) |
| 6578 | continue; |
| 6579 | |
| 6580 | link_id = le16_get_bits(prof->control, |
| 6581 | IEEE80211_MLE_STA_CONTROL_LINK_ID); |
| 6582 | /* need a valid link ID, but also not our own, both AP bugs */ |
| 6583 | if (link_id == reporting_link_id || |
| 6584 | link_id >= IEEE80211_MLD_MAX_NUM_LINKS) |
| 6585 | continue; |
| 6586 | |
| 6587 | link = sdata_dereference(sdata->link[link_id], sdata); |
| 6588 | if (!link) |
| 6589 | continue; |
| 6590 | |
| 6591 | len = cfg80211_defragment_element(sub, subelems, subelems_len, |
| 6592 | NULL, 0, |
| 6593 | IEEE80211_MLE_SUBELEM_FRAGMENT); |
| 6594 | if (WARN_ON(len < 0)) |
| 6595 | continue; |
| 6596 | |
| 6597 | sta_profiles[link_id] = sub; |
| 6598 | sta_profiles_len[link_id] = len; |
| 6599 | } |
| 6600 | |
| 6601 | for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { |
| 6602 | struct ieee80211_mle_per_sta_profile *prof; |
| 6603 | struct ieee802_11_elems *prof_elems; |
| 6604 | struct ieee80211_link_data *link; |
| 6605 | ssize_t len; |
| 6606 | |
| 6607 | if (link_id == reporting_link_id) |
| 6608 | continue; |
| 6609 | |
| 6610 | link = sdata_dereference(sdata->link[link_id], sdata); |
| 6611 | if (!link) |
| 6612 | continue; |
| 6613 | |
| 6614 | if (!sta_profiles[link_id]) { |
| 6615 | prof_elems = NULL; |
| 6616 | goto handle; |
| 6617 | } |
| 6618 | |
| 6619 | /* we can defragment in-place, won't use the buffer again */ |
| 6620 | len = cfg80211_defragment_element(sta_profiles[link_id], |
| 6621 | subelems, subelems_len, |
| 6622 | (void *)sta_profiles[link_id], |
| 6623 | sta_profiles_len[link_id], |
| 6624 | IEEE80211_MLE_SUBELEM_FRAGMENT); |
| 6625 | if (WARN_ON(len != sta_profiles_len[link_id])) |
| 6626 | continue; |
| 6627 | |
| 6628 | prof = (void *)sta_profiles[link_id]; |
| 6629 | prof_elems = ieee802_11_parse_elems(prof->variable + |
| 6630 | (prof->sta_info_len - 1), |
| 6631 | len - |
| 6632 | (prof->sta_info_len - 1), |
| 6633 | false, NULL); |
| 6634 | |
| 6635 | /* memory allocation failed - let's hope that's transient */ |
| 6636 | if (!prof_elems) |
| 6637 | continue; |
| 6638 | |
| 6639 | handle: |
| 6640 | /* |
| 6641 | * FIXME: the timings here are obviously incorrect, |
| 6642 | * but only older Intel drivers seem to care, and |
| 6643 | * those don't have MLO. If you really need this, |
| 6644 | * the problem is having to calculate it with the |
| 6645 | * TSF offset etc. The device_timestamp is still |
| 6646 | * correct, of course. |
| 6647 | */ |
| 6648 | ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, |
| 6649 | IEEE80211_CSA_SOURCE_OTHER_LINK); |
| 6650 | kfree(prof_elems); |
| 6651 | } |
| 6652 | } |
| 6653 | |
| 6654 | static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, |
| 6655 | const struct ieee802_11_elems *elems) |
| 6656 | { |
| 6657 | struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; |
| 6658 | static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; |
| 6659 | |
| 6660 | if (!elems->ssid) |
| 6661 | return false; |
| 6662 | |
| 6663 | /* hidden SSID: zero length */ |
| 6664 | if (elems->ssid_len == 0) |
| 6665 | return false; |
| 6666 | |
| 6667 | if (elems->ssid_len != cfg->ssid_len) |
| 6668 | return true; |
| 6669 | |
| 6670 | /* hidden SSID: zeroed out */ |
| 6671 | if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) |
| 6672 | return false; |
| 6673 | |
| 6674 | return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); |
| 6675 | } |
| 6676 | |
| 6677 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, |
| 6678 | struct ieee80211_hdr *hdr, size_t len, |
| 6679 | struct ieee80211_rx_status *rx_status) |
| 6680 | { |
| 6681 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 6682 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 6683 | struct ieee80211_bss_conf *bss_conf = link->conf; |
| 6684 | struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; |
| 6685 | struct ieee80211_mgmt *mgmt = (void *) hdr; |
| 6686 | size_t baselen; |
| 6687 | struct ieee802_11_elems *elems; |
| 6688 | struct ieee80211_local *local = sdata->local; |
| 6689 | struct ieee80211_chanctx_conf *chanctx_conf; |
| 6690 | struct ieee80211_supported_band *sband; |
| 6691 | struct ieee80211_channel *chan; |
| 6692 | struct link_sta_info *link_sta; |
| 6693 | struct sta_info *sta; |
| 6694 | u64 changed = 0; |
| 6695 | bool erp_valid; |
| 6696 | u8 erp_value = 0; |
| 6697 | u32 ncrc = 0; |
| 6698 | u8 *bssid, *variable = mgmt->u.beacon.variable; |
| 6699 | u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
| 6700 | struct ieee80211_elems_parse_params parse_params = { |
| 6701 | .mode = link->u.mgd.conn.mode, |
| 6702 | .link_id = -1, |
| 6703 | .from_ap = true, |
| 6704 | }; |
| 6705 | |
| 6706 | lockdep_assert_wiphy(local->hw.wiphy); |
| 6707 | |
| 6708 | /* Process beacon from the current BSS */ |
| 6709 | bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); |
| 6710 | if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { |
| 6711 | struct ieee80211_ext *ext = (void *) mgmt; |
| 6712 | |
| 6713 | if (ieee80211_is_s1g_short_beacon(ext->frame_control)) |
| 6714 | variable = ext->u.s1g_short_beacon.variable; |
| 6715 | else |
| 6716 | variable = ext->u.s1g_beacon.variable; |
| 6717 | } |
| 6718 | |
| 6719 | baselen = (u8 *) variable - (u8 *) mgmt; |
| 6720 | if (baselen > len) |
| 6721 | return; |
| 6722 | |
| 6723 | parse_params.start = variable; |
| 6724 | parse_params.len = len - baselen; |
| 6725 | |
| 6726 | rcu_read_lock(); |
| 6727 | chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); |
| 6728 | if (!chanctx_conf) { |
| 6729 | rcu_read_unlock(); |
| 6730 | return; |
| 6731 | } |
| 6732 | |
| 6733 | if (ieee80211_rx_status_to_khz(rx_status) != |
| 6734 | ieee80211_channel_to_khz(chanctx_conf->def.chan)) { |
| 6735 | rcu_read_unlock(); |
| 6736 | return; |
| 6737 | } |
| 6738 | chan = chanctx_conf->def.chan; |
| 6739 | rcu_read_unlock(); |
| 6740 | |
| 6741 | if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && |
| 6742 | !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && |
| 6743 | ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { |
| 6744 | parse_params.bss = ifmgd->assoc_data->link[0].bss; |
| 6745 | elems = ieee802_11_parse_elems_full(&parse_params); |
| 6746 | if (!elems) |
| 6747 | return; |
| 6748 | |
| 6749 | ieee80211_rx_bss_info(link, mgmt, len, rx_status); |
| 6750 | |
| 6751 | if (elems->dtim_period) |
| 6752 | link->u.mgd.dtim_period = elems->dtim_period; |
| 6753 | link->u.mgd.have_beacon = true; |
| 6754 | ifmgd->assoc_data->need_beacon = false; |
| 6755 | if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && |
| 6756 | !ieee80211_is_s1g_beacon(hdr->frame_control)) { |
| 6757 | bss_conf->sync_tsf = |
| 6758 | le64_to_cpu(mgmt->u.beacon.timestamp); |
| 6759 | bss_conf->sync_device_ts = |
| 6760 | rx_status->device_timestamp; |
| 6761 | bss_conf->sync_dtim_count = elems->dtim_count; |
| 6762 | } |
| 6763 | |
| 6764 | if (elems->mbssid_config_ie) |
| 6765 | bss_conf->profile_periodicity = |
| 6766 | elems->mbssid_config_ie->profile_periodicity; |
| 6767 | else |
| 6768 | bss_conf->profile_periodicity = 0; |
| 6769 | |
| 6770 | if (elems->ext_capab_len >= 11 && |
| 6771 | (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) |
| 6772 | bss_conf->ema_ap = true; |
| 6773 | else |
| 6774 | bss_conf->ema_ap = false; |
| 6775 | |
| 6776 | /* continue assoc process */ |
| 6777 | ifmgd->assoc_data->timeout = jiffies; |
| 6778 | ifmgd->assoc_data->timeout_started = true; |
| 6779 | run_again(sdata, ifmgd->assoc_data->timeout); |
| 6780 | kfree(elems); |
| 6781 | return; |
| 6782 | } |
| 6783 | |
| 6784 | if (!ifmgd->associated || |
| 6785 | !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) |
| 6786 | return; |
| 6787 | bssid = link->u.mgd.bssid; |
| 6788 | |
| 6789 | if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) |
| 6790 | ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, |
| 6791 | local, rx_status); |
| 6792 | |
| 6793 | if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { |
| 6794 | mlme_dbg_ratelimited(sdata, |
| 6795 | "cancelling AP probe due to a received beacon\n"); |
| 6796 | ieee80211_reset_ap_probe(sdata); |
| 6797 | } |
| 6798 | |
| 6799 | /* |
| 6800 | * Push the beacon loss detection into the future since |
| 6801 | * we are processing a beacon from the AP just now. |
| 6802 | */ |
| 6803 | ieee80211_sta_reset_beacon_monitor(sdata); |
| 6804 | |
| 6805 | /* TODO: CRC urrently not calculated on S1G Beacon Compatibility |
| 6806 | * element (which carries the beacon interval). Don't forget to add a |
| 6807 | * bit to care_about_ies[] above if mac80211 is interested in a |
| 6808 | * changing S1G element. |
| 6809 | */ |
| 6810 | if (!ieee80211_is_s1g_beacon(hdr->frame_control)) |
| 6811 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
| 6812 | parse_params.bss = bss_conf->bss; |
| 6813 | parse_params.filter = care_about_ies; |
| 6814 | parse_params.crc = ncrc; |
| 6815 | elems = ieee802_11_parse_elems_full(&parse_params); |
| 6816 | if (!elems) |
| 6817 | return; |
| 6818 | |
| 6819 | if (rx_status->flag & RX_FLAG_DECRYPTED && |
| 6820 | ieee80211_mgd_ssid_mismatch(sdata, elems)) { |
| 6821 | sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", |
| 6822 | sdata->vif.cfg.ap_addr); |
| 6823 | __ieee80211_disconnect(sdata); |
| 6824 | return; |
| 6825 | } |
| 6826 | |
| 6827 | ncrc = elems->crc; |
| 6828 | |
| 6829 | if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && |
| 6830 | ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { |
| 6831 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
| 6832 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
| 6833 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
| 6834 | ieee80211_hw_config(local, |
| 6835 | IEEE80211_CONF_CHANGE_PS); |
| 6836 | } |
| 6837 | ieee80211_send_nullfunc(local, sdata, false); |
| 6838 | } else if (!local->pspolling && sdata->u.mgd.powersave) { |
| 6839 | local->pspolling = true; |
| 6840 | |
| 6841 | /* |
| 6842 | * Here is assumed that the driver will be |
| 6843 | * able to send ps-poll frame and receive a |
| 6844 | * response even though power save mode is |
| 6845 | * enabled, but some drivers might require |
| 6846 | * to disable power save here. This needs |
| 6847 | * to be investigated. |
| 6848 | */ |
| 6849 | ieee80211_send_pspoll(local, sdata); |
| 6850 | } |
| 6851 | } |
| 6852 | |
| 6853 | if (sdata->vif.p2p || |
| 6854 | sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { |
| 6855 | struct ieee80211_p2p_noa_attr noa = {}; |
| 6856 | int ret; |
| 6857 | |
| 6858 | ret = cfg80211_get_p2p_attr(variable, |
| 6859 | len - baselen, |
| 6860 | IEEE80211_P2P_ATTR_ABSENCE_NOTICE, |
| 6861 | (u8 *) &noa, sizeof(noa)); |
| 6862 | if (ret >= 2) { |
| 6863 | if (link->u.mgd.p2p_noa_index != noa.index) { |
| 6864 | /* valid noa_attr and index changed */ |
| 6865 | link->u.mgd.p2p_noa_index = noa.index; |
| 6866 | memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); |
| 6867 | changed |= BSS_CHANGED_P2P_PS; |
| 6868 | /* |
| 6869 | * make sure we update all information, the CRC |
| 6870 | * mechanism doesn't look at P2P attributes. |
| 6871 | */ |
| 6872 | link->u.mgd.beacon_crc_valid = false; |
| 6873 | } |
| 6874 | } else if (link->u.mgd.p2p_noa_index != -1) { |
| 6875 | /* noa_attr not found and we had valid noa_attr before */ |
| 6876 | link->u.mgd.p2p_noa_index = -1; |
| 6877 | memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); |
| 6878 | changed |= BSS_CHANGED_P2P_PS; |
| 6879 | link->u.mgd.beacon_crc_valid = false; |
| 6880 | } |
| 6881 | } |
| 6882 | |
| 6883 | /* |
| 6884 | * Update beacon timing and dtim count on every beacon appearance. This |
| 6885 | * will allow the driver to use the most updated values. Do it before |
| 6886 | * comparing this one with last received beacon. |
| 6887 | * IMPORTANT: These parameters would possibly be out of sync by the time |
| 6888 | * the driver will use them. The synchronized view is currently |
| 6889 | * guaranteed only in certain callbacks. |
| 6890 | */ |
| 6891 | if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && |
| 6892 | !ieee80211_is_s1g_beacon(hdr->frame_control)) { |
| 6893 | bss_conf->sync_tsf = |
| 6894 | le64_to_cpu(mgmt->u.beacon.timestamp); |
| 6895 | bss_conf->sync_device_ts = |
| 6896 | rx_status->device_timestamp; |
| 6897 | bss_conf->sync_dtim_count = elems->dtim_count; |
| 6898 | } |
| 6899 | |
| 6900 | if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || |
| 6901 | ieee80211_is_s1g_short_beacon(mgmt->frame_control)) |
| 6902 | goto free; |
| 6903 | link->u.mgd.beacon_crc = ncrc; |
| 6904 | link->u.mgd.beacon_crc_valid = true; |
| 6905 | |
| 6906 | ieee80211_rx_bss_info(link, mgmt, len, rx_status); |
| 6907 | |
| 6908 | ieee80211_sta_process_chanswitch(link, rx_status->mactime, |
| 6909 | rx_status->device_timestamp, |
| 6910 | elems, elems, |
| 6911 | IEEE80211_CSA_SOURCE_BEACON); |
| 6912 | |
| 6913 | /* note that after this elems->ml_basic can no longer be used fully */ |
| 6914 | ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); |
| 6915 | |
| 6916 | if (!link->u.mgd.disable_wmm_tracking && |
| 6917 | ieee80211_sta_wmm_params(local, link, elems->wmm_param, |
| 6918 | elems->wmm_param_len, |
| 6919 | elems->mu_edca_param_set)) |
| 6920 | changed |= BSS_CHANGED_QOS; |
| 6921 | |
| 6922 | /* |
| 6923 | * If we haven't had a beacon before, tell the driver about the |
| 6924 | * DTIM period (and beacon timing if desired) now. |
| 6925 | */ |
| 6926 | if (!link->u.mgd.have_beacon) { |
| 6927 | /* a few bogus AP send dtim_period = 0 or no TIM IE */ |
| 6928 | bss_conf->dtim_period = elems->dtim_period ?: 1; |
| 6929 | |
| 6930 | changed |= BSS_CHANGED_BEACON_INFO; |
| 6931 | link->u.mgd.have_beacon = true; |
| 6932 | |
| 6933 | ieee80211_recalc_ps(local); |
| 6934 | |
| 6935 | ieee80211_recalc_ps_vif(sdata); |
| 6936 | } |
| 6937 | |
| 6938 | if (elems->erp_info) { |
| 6939 | erp_valid = true; |
| 6940 | erp_value = elems->erp_info[0]; |
| 6941 | } else { |
| 6942 | erp_valid = false; |
| 6943 | } |
| 6944 | |
| 6945 | if (!ieee80211_is_s1g_beacon(hdr->frame_control)) |
| 6946 | changed |= ieee80211_handle_bss_capability(link, |
| 6947 | le16_to_cpu(mgmt->u.beacon.capab_info), |
| 6948 | erp_valid, erp_value); |
| 6949 | |
| 6950 | sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); |
| 6951 | if (WARN_ON(!sta)) { |
| 6952 | goto free; |
| 6953 | } |
| 6954 | link_sta = rcu_dereference_protected(sta->link[link->link_id], |
| 6955 | lockdep_is_held(&local->hw.wiphy->mtx)); |
| 6956 | if (WARN_ON(!link_sta)) { |
| 6957 | goto free; |
| 6958 | } |
| 6959 | |
| 6960 | if (WARN_ON(!bss_conf->chanreq.oper.chan)) |
| 6961 | goto free; |
| 6962 | |
| 6963 | sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; |
| 6964 | |
| 6965 | changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); |
| 6966 | |
| 6967 | if (ieee80211_config_bw(link, elems, true, &changed)) { |
| 6968 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
| 6969 | WLAN_REASON_DEAUTH_LEAVING, |
| 6970 | true, deauth_buf); |
| 6971 | ieee80211_report_disconnect(sdata, deauth_buf, |
| 6972 | sizeof(deauth_buf), true, |
| 6973 | WLAN_REASON_DEAUTH_LEAVING, |
| 6974 | false); |
| 6975 | goto free; |
| 6976 | } |
| 6977 | |
| 6978 | if (elems->opmode_notif) |
| 6979 | ieee80211_vht_handle_opmode(sdata, link_sta, |
| 6980 | *elems->opmode_notif, |
| 6981 | rx_status->band); |
| 6982 | |
| 6983 | changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, |
| 6984 | elems->country_elem, |
| 6985 | elems->country_elem_len, |
| 6986 | elems->pwr_constr_elem, |
| 6987 | elems->cisco_dtpc_elem); |
| 6988 | |
| 6989 | ieee80211_ml_reconfiguration(sdata, elems); |
| 6990 | ieee80211_process_adv_ttlm(sdata, elems, |
| 6991 | le64_to_cpu(mgmt->u.beacon.timestamp)); |
| 6992 | |
| 6993 | ieee80211_link_info_change_notify(sdata, link, changed); |
| 6994 | free: |
| 6995 | kfree(elems); |
| 6996 | } |
| 6997 | |
| 6998 | static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, |
| 6999 | struct ieee80211_neg_ttlm neg_ttlm) |
| 7000 | { |
| 7001 | u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; |
| 7002 | u8 i; |
| 7003 | |
| 7004 | for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) |
| 7005 | map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; |
| 7006 | |
| 7007 | /* If there is an active TTLM, unset previously suspended links */ |
| 7008 | if (sdata->vif.neg_ttlm.valid) |
| 7009 | sdata->vif.dormant_links &= ~sdata->vif.suspended_links; |
| 7010 | |
| 7011 | /* exclude links that are already disabled by advertised TTLM */ |
| 7012 | new_active_links = |
| 7013 | map & sdata->vif.valid_links & ~sdata->vif.dormant_links; |
| 7014 | new_suspended_links = |
| 7015 | (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; |
| 7016 | new_dormant_links = sdata->vif.dormant_links | new_suspended_links; |
| 7017 | if (ieee80211_ttlm_set_links(sdata, new_active_links, |
| 7018 | new_dormant_links, new_suspended_links)) |
| 7019 | return; |
| 7020 | |
| 7021 | sdata->vif.neg_ttlm = neg_ttlm; |
| 7022 | sdata->vif.neg_ttlm.valid = true; |
| 7023 | } |
| 7024 | |
| 7025 | static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, |
| 7026 | struct wiphy_work *work) |
| 7027 | { |
| 7028 | struct ieee80211_sub_if_data *sdata = |
| 7029 | container_of(work, struct ieee80211_sub_if_data, |
| 7030 | u.mgd.neg_ttlm_timeout_work.work); |
| 7031 | |
| 7032 | sdata_info(sdata, |
| 7033 | "No negotiated TTLM response from AP, disconnecting.\n"); |
| 7034 | |
| 7035 | __ieee80211_disconnect(sdata); |
| 7036 | } |
| 7037 | |
| 7038 | static void |
| 7039 | ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, |
| 7040 | struct ieee80211_neg_ttlm *neg_ttlm) |
| 7041 | { |
| 7042 | u8 i, direction[IEEE80211_TTLM_MAX_CNT]; |
| 7043 | |
| 7044 | if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, |
| 7045 | sizeof(neg_ttlm->downlink))) { |
| 7046 | direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; |
| 7047 | direction[1] = IEEE80211_TTLM_DIRECTION_UP; |
| 7048 | } else { |
| 7049 | direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; |
| 7050 | } |
| 7051 | |
| 7052 | for (i = 0; i < ARRAY_SIZE(direction); i++) { |
| 7053 | u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; |
| 7054 | __le16 map; |
| 7055 | |
| 7056 | len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; |
| 7057 | |
| 7058 | pos = skb_put(skb, len + 2); |
| 7059 | *pos++ = WLAN_EID_EXTENSION; |
| 7060 | len_pos = pos++; |
| 7061 | *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; |
| 7062 | *pos++ = direction[i]; |
| 7063 | map_ind_pos = pos++; |
| 7064 | for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { |
| 7065 | map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? |
| 7066 | cpu_to_le16(neg_ttlm->uplink[tid]) : |
| 7067 | cpu_to_le16(neg_ttlm->downlink[tid]); |
| 7068 | if (!map) |
| 7069 | continue; |
| 7070 | |
| 7071 | len += 2; |
| 7072 | map_ind |= BIT(tid); |
| 7073 | skb_put_data(skb, &map, sizeof(map)); |
| 7074 | } |
| 7075 | |
| 7076 | *map_ind_pos = map_ind; |
| 7077 | *len_pos = len; |
| 7078 | |
| 7079 | if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) |
| 7080 | break; |
| 7081 | } |
| 7082 | } |
| 7083 | |
| 7084 | static void |
| 7085 | ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, |
| 7086 | struct ieee80211_neg_ttlm *neg_ttlm, |
| 7087 | u8 dialog_token) |
| 7088 | { |
| 7089 | struct ieee80211_local *local = sdata->local; |
| 7090 | struct ieee80211_mgmt *mgmt; |
| 7091 | struct sk_buff *skb; |
| 7092 | int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); |
| 7093 | int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + |
| 7094 | 2 * 2 * IEEE80211_TTLM_NUM_TIDS; |
| 7095 | |
| 7096 | skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); |
| 7097 | if (!skb) |
| 7098 | return; |
| 7099 | |
| 7100 | skb_reserve(skb, local->tx_headroom); |
| 7101 | mgmt = skb_put_zero(skb, hdr_len); |
| 7102 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 7103 | IEEE80211_STYPE_ACTION); |
| 7104 | memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); |
| 7105 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
| 7106 | memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); |
| 7107 | |
| 7108 | mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; |
| 7109 | mgmt->u.action.u.ttlm_req.action_code = |
| 7110 | WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; |
| 7111 | mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; |
| 7112 | ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); |
| 7113 | ieee80211_tx_skb(sdata, skb); |
| 7114 | } |
| 7115 | |
| 7116 | int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, |
| 7117 | struct cfg80211_ttlm_params *params) |
| 7118 | { |
| 7119 | struct ieee80211_neg_ttlm neg_ttlm = {}; |
| 7120 | u8 i; |
| 7121 | |
| 7122 | if (!ieee80211_vif_is_mld(&sdata->vif) || |
| 7123 | !(sdata->vif.cfg.mld_capa_op & |
| 7124 | IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) |
| 7125 | return -EINVAL; |
| 7126 | |
| 7127 | for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { |
| 7128 | if ((params->dlink[i] & ~sdata->vif.valid_links) || |
| 7129 | (params->ulink[i] & ~sdata->vif.valid_links)) |
| 7130 | return -EINVAL; |
| 7131 | |
| 7132 | neg_ttlm.downlink[i] = params->dlink[i]; |
| 7133 | neg_ttlm.uplink[i] = params->ulink[i]; |
| 7134 | } |
| 7135 | |
| 7136 | if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != |
| 7137 | NEG_TTLM_RES_ACCEPT) |
| 7138 | return -EINVAL; |
| 7139 | |
| 7140 | ieee80211_apply_neg_ttlm(sdata, neg_ttlm); |
| 7141 | sdata->u.mgd.dialog_token_alloc++; |
| 7142 | ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, |
| 7143 | sdata->u.mgd.dialog_token_alloc); |
| 7144 | wiphy_delayed_work_cancel(sdata->local->hw.wiphy, |
| 7145 | &sdata->u.mgd.neg_ttlm_timeout_work); |
| 7146 | wiphy_delayed_work_queue(sdata->local->hw.wiphy, |
| 7147 | &sdata->u.mgd.neg_ttlm_timeout_work, |
| 7148 | IEEE80211_NEG_TTLM_REQ_TIMEOUT); |
| 7149 | return 0; |
| 7150 | } |
| 7151 | |
| 7152 | static void |
| 7153 | ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, |
| 7154 | enum ieee80211_neg_ttlm_res ttlm_res, |
| 7155 | u8 dialog_token, |
| 7156 | struct ieee80211_neg_ttlm *neg_ttlm) |
| 7157 | { |
| 7158 | struct ieee80211_local *local = sdata->local; |
| 7159 | struct ieee80211_mgmt *mgmt; |
| 7160 | struct sk_buff *skb; |
| 7161 | int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); |
| 7162 | int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + |
| 7163 | 2 * 2 * IEEE80211_TTLM_NUM_TIDS; |
| 7164 | |
| 7165 | skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); |
| 7166 | if (!skb) |
| 7167 | return; |
| 7168 | |
| 7169 | skb_reserve(skb, local->tx_headroom); |
| 7170 | mgmt = skb_put_zero(skb, hdr_len); |
| 7171 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 7172 | IEEE80211_STYPE_ACTION); |
| 7173 | memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); |
| 7174 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
| 7175 | memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); |
| 7176 | |
| 7177 | mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; |
| 7178 | mgmt->u.action.u.ttlm_res.action_code = |
| 7179 | WLAN_PROTECTED_EHT_ACTION_TTLM_RES; |
| 7180 | mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; |
| 7181 | switch (ttlm_res) { |
| 7182 | default: |
| 7183 | WARN_ON(1); |
| 7184 | fallthrough; |
| 7185 | case NEG_TTLM_RES_REJECT: |
| 7186 | mgmt->u.action.u.ttlm_res.status_code = |
| 7187 | WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; |
| 7188 | break; |
| 7189 | case NEG_TTLM_RES_ACCEPT: |
| 7190 | mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS; |
| 7191 | break; |
| 7192 | case NEG_TTLM_RES_SUGGEST_PREFERRED: |
| 7193 | mgmt->u.action.u.ttlm_res.status_code = |
| 7194 | WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; |
| 7195 | ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); |
| 7196 | break; |
| 7197 | } |
| 7198 | |
| 7199 | ieee80211_tx_skb(sdata, skb); |
| 7200 | } |
| 7201 | |
| 7202 | static int |
| 7203 | ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, |
| 7204 | const struct ieee80211_ttlm_elem *ttlm, |
| 7205 | struct ieee80211_neg_ttlm *neg_ttlm, |
| 7206 | u8 *direction) |
| 7207 | { |
| 7208 | u8 control, link_map_presence, map_size, tid; |
| 7209 | u8 *pos; |
| 7210 | |
| 7211 | /* The element size was already validated in |
| 7212 | * ieee80211_tid_to_link_map_size_ok() |
| 7213 | */ |
| 7214 | pos = (void *)ttlm->optional; |
| 7215 | |
| 7216 | control = ttlm->control; |
| 7217 | |
| 7218 | /* mapping switch time and expected duration fields are not expected |
| 7219 | * in case of negotiated TTLM |
| 7220 | */ |
| 7221 | if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | |
| 7222 | IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { |
| 7223 | mlme_dbg(sdata, |
| 7224 | "Invalid TTLM element in negotiated TTLM request\n"); |
| 7225 | return -EINVAL; |
| 7226 | } |
| 7227 | |
| 7228 | if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { |
| 7229 | for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { |
| 7230 | neg_ttlm->downlink[tid] = sdata->vif.valid_links; |
| 7231 | neg_ttlm->uplink[tid] = sdata->vif.valid_links; |
| 7232 | } |
| 7233 | *direction = IEEE80211_TTLM_DIRECTION_BOTH; |
| 7234 | return 0; |
| 7235 | } |
| 7236 | |
| 7237 | *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); |
| 7238 | if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && |
| 7239 | *direction != IEEE80211_TTLM_DIRECTION_UP && |
| 7240 | *direction != IEEE80211_TTLM_DIRECTION_BOTH) |
| 7241 | return -EINVAL; |
| 7242 | |
| 7243 | link_map_presence = *pos; |
| 7244 | pos++; |
| 7245 | |
| 7246 | if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) |
| 7247 | map_size = 1; |
| 7248 | else |
| 7249 | map_size = 2; |
| 7250 | |
| 7251 | for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { |
| 7252 | u16 map; |
| 7253 | |
| 7254 | if (link_map_presence & BIT(tid)) { |
| 7255 | map = ieee80211_get_ttlm(map_size, pos); |
| 7256 | if (!map) { |
| 7257 | mlme_dbg(sdata, |
| 7258 | "No active links for TID %d", tid); |
| 7259 | return -EINVAL; |
| 7260 | } |
| 7261 | } else { |
| 7262 | map = 0; |
| 7263 | } |
| 7264 | |
| 7265 | switch (*direction) { |
| 7266 | case IEEE80211_TTLM_DIRECTION_BOTH: |
| 7267 | neg_ttlm->downlink[tid] = map; |
| 7268 | neg_ttlm->uplink[tid] = map; |
| 7269 | break; |
| 7270 | case IEEE80211_TTLM_DIRECTION_DOWN: |
| 7271 | neg_ttlm->downlink[tid] = map; |
| 7272 | break; |
| 7273 | case IEEE80211_TTLM_DIRECTION_UP: |
| 7274 | neg_ttlm->uplink[tid] = map; |
| 7275 | break; |
| 7276 | default: |
| 7277 | return -EINVAL; |
| 7278 | } |
| 7279 | pos += map_size; |
| 7280 | } |
| 7281 | return 0; |
| 7282 | } |
| 7283 | |
| 7284 | void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, |
| 7285 | struct ieee80211_mgmt *mgmt, size_t len) |
| 7286 | { |
| 7287 | u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; |
| 7288 | size_t ies_len; |
| 7289 | enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; |
| 7290 | struct ieee802_11_elems *elems = NULL; |
| 7291 | struct ieee80211_neg_ttlm neg_ttlm = {}; |
| 7292 | |
| 7293 | BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); |
| 7294 | |
| 7295 | if (!ieee80211_vif_is_mld(&sdata->vif)) |
| 7296 | return; |
| 7297 | |
| 7298 | dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; |
| 7299 | ies_len = len - offsetof(struct ieee80211_mgmt, |
| 7300 | u.action.u.ttlm_req.variable); |
| 7301 | elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, |
| 7302 | ies_len, true, NULL); |
| 7303 | if (!elems) { |
| 7304 | ttlm_res = NEG_TTLM_RES_REJECT; |
| 7305 | goto out; |
| 7306 | } |
| 7307 | |
| 7308 | for (i = 0; i < elems->ttlm_num; i++) { |
| 7309 | if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], |
| 7310 | &neg_ttlm, &direction[i]) || |
| 7311 | (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && |
| 7312 | elems->ttlm_num != 1)) { |
| 7313 | ttlm_res = NEG_TTLM_RES_REJECT; |
| 7314 | goto out; |
| 7315 | } |
| 7316 | } |
| 7317 | |
| 7318 | if (!elems->ttlm_num || |
| 7319 | (elems->ttlm_num == 2 && direction[0] == direction[1])) { |
| 7320 | ttlm_res = NEG_TTLM_RES_REJECT; |
| 7321 | goto out; |
| 7322 | } |
| 7323 | |
| 7324 | for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { |
| 7325 | if ((neg_ttlm.downlink[i] && |
| 7326 | (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || |
| 7327 | (neg_ttlm.uplink[i] && |
| 7328 | (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { |
| 7329 | ttlm_res = NEG_TTLM_RES_REJECT; |
| 7330 | goto out; |
| 7331 | } |
| 7332 | } |
| 7333 | |
| 7334 | ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); |
| 7335 | |
| 7336 | if (ttlm_res != NEG_TTLM_RES_ACCEPT) |
| 7337 | goto out; |
| 7338 | |
| 7339 | ieee80211_apply_neg_ttlm(sdata, neg_ttlm); |
| 7340 | out: |
| 7341 | kfree(elems); |
| 7342 | ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); |
| 7343 | } |
| 7344 | |
| 7345 | void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, |
| 7346 | struct ieee80211_mgmt *mgmt, size_t len) |
| 7347 | { |
| 7348 | if (!ieee80211_vif_is_mld(&sdata->vif) || |
| 7349 | mgmt->u.action.u.ttlm_req.dialog_token != |
| 7350 | sdata->u.mgd.dialog_token_alloc) |
| 7351 | return; |
| 7352 | |
| 7353 | wiphy_delayed_work_cancel(sdata->local->hw.wiphy, |
| 7354 | &sdata->u.mgd.neg_ttlm_timeout_work); |
| 7355 | |
| 7356 | /* MLD station sends a TID to link mapping request, mainly to handle |
| 7357 | * BTM (BSS transition management) request, in which case it needs to |
| 7358 | * restrict the active links set. |
| 7359 | * In this case it's not expected that the MLD AP will reject the |
| 7360 | * negotiated TTLM request. |
| 7361 | * This can be better implemented in the future, to handle request |
| 7362 | * rejections. |
| 7363 | */ |
| 7364 | if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS) |
| 7365 | __ieee80211_disconnect(sdata); |
| 7366 | } |
| 7367 | |
| 7368 | static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, |
| 7369 | struct wiphy_work *work) |
| 7370 | { |
| 7371 | u16 new_dormant_links; |
| 7372 | struct ieee80211_sub_if_data *sdata = |
| 7373 | container_of(work, struct ieee80211_sub_if_data, |
| 7374 | u.mgd.teardown_ttlm_work); |
| 7375 | |
| 7376 | if (!sdata->vif.neg_ttlm.valid) |
| 7377 | return; |
| 7378 | |
| 7379 | memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); |
| 7380 | new_dormant_links = |
| 7381 | sdata->vif.dormant_links & ~sdata->vif.suspended_links; |
| 7382 | sdata->vif.suspended_links = 0; |
| 7383 | ieee80211_vif_set_links(sdata, sdata->vif.valid_links, |
| 7384 | new_dormant_links); |
| 7385 | ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | |
| 7386 | BSS_CHANGED_MLD_VALID_LINKS); |
| 7387 | } |
| 7388 | |
| 7389 | void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) |
| 7390 | { |
| 7391 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 7392 | struct ieee80211_local *local = sdata->local; |
| 7393 | struct ieee80211_mgmt *mgmt; |
| 7394 | struct sk_buff *skb; |
| 7395 | int frame_len = offsetofend(struct ieee80211_mgmt, |
| 7396 | u.action.u.ttlm_tear_down); |
| 7397 | struct ieee80211_tx_info *info; |
| 7398 | |
| 7399 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); |
| 7400 | if (!skb) |
| 7401 | return; |
| 7402 | |
| 7403 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 7404 | mgmt = skb_put_zero(skb, frame_len); |
| 7405 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 7406 | IEEE80211_STYPE_ACTION); |
| 7407 | memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); |
| 7408 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
| 7409 | memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); |
| 7410 | |
| 7411 | mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; |
| 7412 | mgmt->u.action.u.ttlm_tear_down.action_code = |
| 7413 | WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; |
| 7414 | |
| 7415 | info = IEEE80211_SKB_CB(skb); |
| 7416 | info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; |
| 7417 | info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; |
| 7418 | ieee80211_tx_skb(sdata, skb); |
| 7419 | } |
| 7420 | EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); |
| 7421 | |
| 7422 | void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, |
| 7423 | struct sk_buff *skb) |
| 7424 | { |
| 7425 | struct ieee80211_link_data *link = &sdata->deflink; |
| 7426 | struct ieee80211_rx_status *rx_status; |
| 7427 | struct ieee80211_hdr *hdr; |
| 7428 | u16 fc; |
| 7429 | |
| 7430 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 7431 | |
| 7432 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
| 7433 | hdr = (struct ieee80211_hdr *) skb->data; |
| 7434 | fc = le16_to_cpu(hdr->frame_control); |
| 7435 | |
| 7436 | switch (fc & IEEE80211_FCTL_STYPE) { |
| 7437 | case IEEE80211_STYPE_S1G_BEACON: |
| 7438 | ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); |
| 7439 | break; |
| 7440 | } |
| 7441 | } |
| 7442 | |
| 7443 | void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
| 7444 | struct sk_buff *skb) |
| 7445 | { |
| 7446 | struct ieee80211_link_data *link = &sdata->deflink; |
| 7447 | struct ieee80211_rx_status *rx_status; |
| 7448 | struct ieee802_11_elems *elems; |
| 7449 | struct ieee80211_mgmt *mgmt; |
| 7450 | u16 fc; |
| 7451 | int ies_len; |
| 7452 | |
| 7453 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 7454 | |
| 7455 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
| 7456 | mgmt = (struct ieee80211_mgmt *) skb->data; |
| 7457 | fc = le16_to_cpu(mgmt->frame_control); |
| 7458 | |
| 7459 | if (rx_status->link_valid) { |
| 7460 | link = sdata_dereference(sdata->link[rx_status->link_id], |
| 7461 | sdata); |
| 7462 | if (!link) |
| 7463 | return; |
| 7464 | } |
| 7465 | |
| 7466 | switch (fc & IEEE80211_FCTL_STYPE) { |
| 7467 | case IEEE80211_STYPE_BEACON: |
| 7468 | ieee80211_rx_mgmt_beacon(link, (void *)mgmt, |
| 7469 | skb->len, rx_status); |
| 7470 | break; |
| 7471 | case IEEE80211_STYPE_PROBE_RESP: |
| 7472 | ieee80211_rx_mgmt_probe_resp(link, skb); |
| 7473 | break; |
| 7474 | case IEEE80211_STYPE_AUTH: |
| 7475 | ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); |
| 7476 | break; |
| 7477 | case IEEE80211_STYPE_DEAUTH: |
| 7478 | ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); |
| 7479 | break; |
| 7480 | case IEEE80211_STYPE_DISASSOC: |
| 7481 | ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); |
| 7482 | break; |
| 7483 | case IEEE80211_STYPE_ASSOC_RESP: |
| 7484 | case IEEE80211_STYPE_REASSOC_RESP: |
| 7485 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); |
| 7486 | break; |
| 7487 | case IEEE80211_STYPE_ACTION: |
| 7488 | if (!sdata->u.mgd.associated || |
| 7489 | !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) |
| 7490 | break; |
| 7491 | |
| 7492 | switch (mgmt->u.action.category) { |
| 7493 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
| 7494 | ies_len = skb->len - |
| 7495 | offsetof(struct ieee80211_mgmt, |
| 7496 | u.action.u.chan_switch.variable); |
| 7497 | |
| 7498 | if (ies_len < 0) |
| 7499 | break; |
| 7500 | |
| 7501 | /* CSA IE cannot be overridden, no need for BSSID */ |
| 7502 | elems = ieee802_11_parse_elems( |
| 7503 | mgmt->u.action.u.chan_switch.variable, |
| 7504 | ies_len, true, NULL); |
| 7505 | |
| 7506 | if (elems && !elems->parse_error) { |
| 7507 | enum ieee80211_csa_source src = |
| 7508 | IEEE80211_CSA_SOURCE_PROT_ACTION; |
| 7509 | |
| 7510 | ieee80211_sta_process_chanswitch(link, |
| 7511 | rx_status->mactime, |
| 7512 | rx_status->device_timestamp, |
| 7513 | elems, elems, |
| 7514 | src); |
| 7515 | } |
| 7516 | kfree(elems); |
| 7517 | break; |
| 7518 | case WLAN_CATEGORY_PUBLIC: |
| 7519 | case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: |
| 7520 | ies_len = skb->len - |
| 7521 | offsetof(struct ieee80211_mgmt, |
| 7522 | u.action.u.ext_chan_switch.variable); |
| 7523 | |
| 7524 | if (ies_len < 0) |
| 7525 | break; |
| 7526 | |
| 7527 | /* |
| 7528 | * extended CSA IE can't be overridden, no need for |
| 7529 | * BSSID |
| 7530 | */ |
| 7531 | elems = ieee802_11_parse_elems( |
| 7532 | mgmt->u.action.u.ext_chan_switch.variable, |
| 7533 | ies_len, true, NULL); |
| 7534 | |
| 7535 | if (elems && !elems->parse_error) { |
| 7536 | enum ieee80211_csa_source src; |
| 7537 | |
| 7538 | if (mgmt->u.action.category == |
| 7539 | WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) |
| 7540 | src = IEEE80211_CSA_SOURCE_PROT_ACTION; |
| 7541 | else |
| 7542 | src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; |
| 7543 | |
| 7544 | /* for the handling code pretend it was an IE */ |
| 7545 | elems->ext_chansw_ie = |
| 7546 | &mgmt->u.action.u.ext_chan_switch.data; |
| 7547 | |
| 7548 | ieee80211_sta_process_chanswitch(link, |
| 7549 | rx_status->mactime, |
| 7550 | rx_status->device_timestamp, |
| 7551 | elems, elems, |
| 7552 | src); |
| 7553 | } |
| 7554 | |
| 7555 | kfree(elems); |
| 7556 | break; |
| 7557 | } |
| 7558 | break; |
| 7559 | } |
| 7560 | } |
| 7561 | |
| 7562 | static void ieee80211_sta_timer(struct timer_list *t) |
| 7563 | { |
| 7564 | struct ieee80211_sub_if_data *sdata = |
| 7565 | from_timer(sdata, t, u.mgd.timer); |
| 7566 | |
| 7567 | wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); |
| 7568 | } |
| 7569 | |
| 7570 | void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, |
| 7571 | u8 reason, bool tx) |
| 7572 | { |
| 7573 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
| 7574 | |
| 7575 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, |
| 7576 | tx, frame_buf); |
| 7577 | |
| 7578 | ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, |
| 7579 | reason, false); |
| 7580 | } |
| 7581 | |
| 7582 | static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) |
| 7583 | { |
| 7584 | struct ieee80211_local *local = sdata->local; |
| 7585 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 7586 | struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; |
| 7587 | u32 tx_flags = 0; |
| 7588 | u16 trans = 1; |
| 7589 | u16 status = 0; |
| 7590 | struct ieee80211_prep_tx_info info = { |
| 7591 | .subtype = IEEE80211_STYPE_AUTH, |
| 7592 | }; |
| 7593 | |
| 7594 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 7595 | |
| 7596 | if (WARN_ON_ONCE(!auth_data)) |
| 7597 | return -EINVAL; |
| 7598 | |
| 7599 | auth_data->tries++; |
| 7600 | |
| 7601 | if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { |
| 7602 | sdata_info(sdata, "authentication with %pM timed out\n", |
| 7603 | auth_data->ap_addr); |
| 7604 | |
| 7605 | /* |
| 7606 | * Most likely AP is not in the range so remove the |
| 7607 | * bss struct for that AP. |
| 7608 | */ |
| 7609 | cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); |
| 7610 | |
| 7611 | return -ETIMEDOUT; |
| 7612 | } |
| 7613 | |
| 7614 | if (auth_data->algorithm == WLAN_AUTH_SAE) |
| 7615 | info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); |
| 7616 | |
| 7617 | info.link_id = auth_data->link_id; |
| 7618 | drv_mgd_prepare_tx(local, sdata, &info); |
| 7619 | |
| 7620 | sdata_info(sdata, "send auth to %pM (try %d/%d)\n", |
| 7621 | auth_data->ap_addr, auth_data->tries, |
| 7622 | IEEE80211_AUTH_MAX_TRIES); |
| 7623 | |
| 7624 | auth_data->expected_transaction = 2; |
| 7625 | |
| 7626 | if (auth_data->algorithm == WLAN_AUTH_SAE) { |
| 7627 | trans = auth_data->sae_trans; |
| 7628 | status = auth_data->sae_status; |
| 7629 | auth_data->expected_transaction = trans; |
| 7630 | } |
| 7631 | |
| 7632 | if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) |
| 7633 | tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
| 7634 | IEEE80211_TX_INTFL_MLME_CONN_TX; |
| 7635 | |
| 7636 | ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, |
| 7637 | auth_data->data, auth_data->data_len, |
| 7638 | auth_data->ap_addr, auth_data->ap_addr, |
| 7639 | NULL, 0, 0, tx_flags); |
| 7640 | |
| 7641 | if (tx_flags == 0) { |
| 7642 | if (auth_data->algorithm == WLAN_AUTH_SAE) |
| 7643 | auth_data->timeout = jiffies + |
| 7644 | IEEE80211_AUTH_TIMEOUT_SAE; |
| 7645 | else |
| 7646 | auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; |
| 7647 | } else { |
| 7648 | auth_data->timeout = |
| 7649 | round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); |
| 7650 | } |
| 7651 | |
| 7652 | auth_data->timeout_started = true; |
| 7653 | run_again(sdata, auth_data->timeout); |
| 7654 | |
| 7655 | return 0; |
| 7656 | } |
| 7657 | |
| 7658 | static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) |
| 7659 | { |
| 7660 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; |
| 7661 | struct ieee80211_local *local = sdata->local; |
| 7662 | int ret; |
| 7663 | |
| 7664 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 7665 | |
| 7666 | assoc_data->tries++; |
| 7667 | assoc_data->comeback = false; |
| 7668 | if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { |
| 7669 | sdata_info(sdata, "association with %pM timed out\n", |
| 7670 | assoc_data->ap_addr); |
| 7671 | |
| 7672 | /* |
| 7673 | * Most likely AP is not in the range so remove the |
| 7674 | * bss struct for that AP. |
| 7675 | */ |
| 7676 | cfg80211_unlink_bss(local->hw.wiphy, |
| 7677 | assoc_data->link[assoc_data->assoc_link_id].bss); |
| 7678 | |
| 7679 | return -ETIMEDOUT; |
| 7680 | } |
| 7681 | |
| 7682 | sdata_info(sdata, "associate with %pM (try %d/%d)\n", |
| 7683 | assoc_data->ap_addr, assoc_data->tries, |
| 7684 | IEEE80211_ASSOC_MAX_TRIES); |
| 7685 | ret = ieee80211_send_assoc(sdata); |
| 7686 | if (ret) |
| 7687 | return ret; |
| 7688 | |
| 7689 | if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { |
| 7690 | assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; |
| 7691 | assoc_data->timeout_started = true; |
| 7692 | run_again(sdata, assoc_data->timeout); |
| 7693 | } else { |
| 7694 | assoc_data->timeout = |
| 7695 | round_jiffies_up(jiffies + |
| 7696 | IEEE80211_ASSOC_TIMEOUT_LONG); |
| 7697 | assoc_data->timeout_started = true; |
| 7698 | run_again(sdata, assoc_data->timeout); |
| 7699 | } |
| 7700 | |
| 7701 | return 0; |
| 7702 | } |
| 7703 | |
| 7704 | void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, |
| 7705 | __le16 fc, bool acked) |
| 7706 | { |
| 7707 | struct ieee80211_local *local = sdata->local; |
| 7708 | |
| 7709 | sdata->u.mgd.status_fc = fc; |
| 7710 | sdata->u.mgd.status_acked = acked; |
| 7711 | sdata->u.mgd.status_received = true; |
| 7712 | |
| 7713 | wiphy_work_queue(local->hw.wiphy, &sdata->work); |
| 7714 | } |
| 7715 | |
| 7716 | void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) |
| 7717 | { |
| 7718 | struct ieee80211_local *local = sdata->local; |
| 7719 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 7720 | |
| 7721 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 7722 | |
| 7723 | if (ifmgd->status_received) { |
| 7724 | __le16 fc = ifmgd->status_fc; |
| 7725 | bool status_acked = ifmgd->status_acked; |
| 7726 | |
| 7727 | ifmgd->status_received = false; |
| 7728 | if (ifmgd->auth_data && ieee80211_is_auth(fc)) { |
| 7729 | if (status_acked) { |
| 7730 | if (ifmgd->auth_data->algorithm == |
| 7731 | WLAN_AUTH_SAE) |
| 7732 | ifmgd->auth_data->timeout = |
| 7733 | jiffies + |
| 7734 | IEEE80211_AUTH_TIMEOUT_SAE; |
| 7735 | else |
| 7736 | ifmgd->auth_data->timeout = |
| 7737 | jiffies + |
| 7738 | IEEE80211_AUTH_TIMEOUT_SHORT; |
| 7739 | run_again(sdata, ifmgd->auth_data->timeout); |
| 7740 | } else { |
| 7741 | ifmgd->auth_data->timeout = jiffies - 1; |
| 7742 | } |
| 7743 | ifmgd->auth_data->timeout_started = true; |
| 7744 | } else if (ifmgd->assoc_data && |
| 7745 | !ifmgd->assoc_data->comeback && |
| 7746 | (ieee80211_is_assoc_req(fc) || |
| 7747 | ieee80211_is_reassoc_req(fc))) { |
| 7748 | /* |
| 7749 | * Update association timeout based on the TX status |
| 7750 | * for the (Re)Association Request frame. Skip this if |
| 7751 | * we have already processed a (Re)Association Response |
| 7752 | * frame that indicated need for association comeback |
| 7753 | * at a specific time in the future. This could happen |
| 7754 | * if the TX status information is delayed enough for |
| 7755 | * the response to be received and processed first. |
| 7756 | */ |
| 7757 | if (status_acked) { |
| 7758 | ifmgd->assoc_data->timeout = |
| 7759 | jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; |
| 7760 | run_again(sdata, ifmgd->assoc_data->timeout); |
| 7761 | } else { |
| 7762 | ifmgd->assoc_data->timeout = jiffies - 1; |
| 7763 | } |
| 7764 | ifmgd->assoc_data->timeout_started = true; |
| 7765 | } |
| 7766 | } |
| 7767 | |
| 7768 | if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && |
| 7769 | time_after(jiffies, ifmgd->auth_data->timeout)) { |
| 7770 | if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { |
| 7771 | /* |
| 7772 | * ok ... we waited for assoc or continuation but |
| 7773 | * userspace didn't do it, so kill the auth data |
| 7774 | */ |
| 7775 | ieee80211_destroy_auth_data(sdata, false); |
| 7776 | } else if (ieee80211_auth(sdata)) { |
| 7777 | u8 ap_addr[ETH_ALEN]; |
| 7778 | struct ieee80211_event event = { |
| 7779 | .type = MLME_EVENT, |
| 7780 | .u.mlme.data = AUTH_EVENT, |
| 7781 | .u.mlme.status = MLME_TIMEOUT, |
| 7782 | }; |
| 7783 | |
| 7784 | memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); |
| 7785 | |
| 7786 | ieee80211_destroy_auth_data(sdata, false); |
| 7787 | |
| 7788 | cfg80211_auth_timeout(sdata->dev, ap_addr); |
| 7789 | drv_event_callback(sdata->local, sdata, &event); |
| 7790 | } |
| 7791 | } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) |
| 7792 | run_again(sdata, ifmgd->auth_data->timeout); |
| 7793 | |
| 7794 | if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && |
| 7795 | time_after(jiffies, ifmgd->assoc_data->timeout)) { |
| 7796 | if ((ifmgd->assoc_data->need_beacon && |
| 7797 | !sdata->deflink.u.mgd.have_beacon) || |
| 7798 | ieee80211_do_assoc(sdata)) { |
| 7799 | struct ieee80211_event event = { |
| 7800 | .type = MLME_EVENT, |
| 7801 | .u.mlme.data = ASSOC_EVENT, |
| 7802 | .u.mlme.status = MLME_TIMEOUT, |
| 7803 | }; |
| 7804 | |
| 7805 | ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); |
| 7806 | drv_event_callback(sdata->local, sdata, &event); |
| 7807 | } |
| 7808 | } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) |
| 7809 | run_again(sdata, ifmgd->assoc_data->timeout); |
| 7810 | |
| 7811 | if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && |
| 7812 | ifmgd->associated) { |
| 7813 | u8 *bssid = sdata->deflink.u.mgd.bssid; |
| 7814 | int max_tries; |
| 7815 | |
| 7816 | if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) |
| 7817 | max_tries = max_nullfunc_tries; |
| 7818 | else |
| 7819 | max_tries = max_probe_tries; |
| 7820 | |
| 7821 | /* ACK received for nullfunc probing frame */ |
| 7822 | if (!ifmgd->probe_send_count) |
| 7823 | ieee80211_reset_ap_probe(sdata); |
| 7824 | else if (ifmgd->nullfunc_failed) { |
| 7825 | if (ifmgd->probe_send_count < max_tries) { |
| 7826 | mlme_dbg(sdata, |
| 7827 | "No ack for nullfunc frame to AP %pM, try %d/%i\n", |
| 7828 | bssid, ifmgd->probe_send_count, |
| 7829 | max_tries); |
| 7830 | ieee80211_mgd_probe_ap_send(sdata); |
| 7831 | } else { |
| 7832 | mlme_dbg(sdata, |
| 7833 | "No ack for nullfunc frame to AP %pM, disconnecting.\n", |
| 7834 | bssid); |
| 7835 | ieee80211_sta_connection_lost(sdata, |
| 7836 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
| 7837 | false); |
| 7838 | } |
| 7839 | } else if (time_is_after_jiffies(ifmgd->probe_timeout)) |
| 7840 | run_again(sdata, ifmgd->probe_timeout); |
| 7841 | else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { |
| 7842 | mlme_dbg(sdata, |
| 7843 | "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", |
| 7844 | bssid, probe_wait_ms); |
| 7845 | ieee80211_sta_connection_lost(sdata, |
| 7846 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); |
| 7847 | } else if (ifmgd->probe_send_count < max_tries) { |
| 7848 | mlme_dbg(sdata, |
| 7849 | "No probe response from AP %pM after %dms, try %d/%i\n", |
| 7850 | bssid, probe_wait_ms, |
| 7851 | ifmgd->probe_send_count, max_tries); |
| 7852 | ieee80211_mgd_probe_ap_send(sdata); |
| 7853 | } else { |
| 7854 | /* |
| 7855 | * We actually lost the connection ... or did we? |
| 7856 | * Let's make sure! |
| 7857 | */ |
| 7858 | mlme_dbg(sdata, |
| 7859 | "No probe response from AP %pM after %dms, disconnecting.\n", |
| 7860 | bssid, probe_wait_ms); |
| 7861 | |
| 7862 | ieee80211_sta_connection_lost(sdata, |
| 7863 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); |
| 7864 | } |
| 7865 | } |
| 7866 | } |
| 7867 | |
| 7868 | static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) |
| 7869 | { |
| 7870 | struct ieee80211_sub_if_data *sdata = |
| 7871 | from_timer(sdata, t, u.mgd.bcn_mon_timer); |
| 7872 | |
| 7873 | if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) |
| 7874 | return; |
| 7875 | |
| 7876 | if (sdata->vif.bss_conf.csa_active && |
| 7877 | !sdata->deflink.u.mgd.csa.waiting_bcn) |
| 7878 | return; |
| 7879 | |
| 7880 | if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) |
| 7881 | return; |
| 7882 | |
| 7883 | sdata->u.mgd.connection_loss = false; |
| 7884 | wiphy_work_queue(sdata->local->hw.wiphy, |
| 7885 | &sdata->u.mgd.beacon_connection_loss_work); |
| 7886 | } |
| 7887 | |
| 7888 | static void ieee80211_sta_conn_mon_timer(struct timer_list *t) |
| 7889 | { |
| 7890 | struct ieee80211_sub_if_data *sdata = |
| 7891 | from_timer(sdata, t, u.mgd.conn_mon_timer); |
| 7892 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 7893 | struct ieee80211_local *local = sdata->local; |
| 7894 | struct sta_info *sta; |
| 7895 | unsigned long timeout; |
| 7896 | |
| 7897 | if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) |
| 7898 | return; |
| 7899 | |
| 7900 | if (sdata->vif.bss_conf.csa_active && |
| 7901 | !sdata->deflink.u.mgd.csa.waiting_bcn) |
| 7902 | return; |
| 7903 | |
| 7904 | sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); |
| 7905 | if (!sta) |
| 7906 | return; |
| 7907 | |
| 7908 | timeout = sta->deflink.status_stats.last_ack; |
| 7909 | if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) |
| 7910 | timeout = sta->deflink.rx_stats.last_rx; |
| 7911 | timeout += IEEE80211_CONNECTION_IDLE_TIME; |
| 7912 | |
| 7913 | /* If timeout is after now, then update timer to fire at |
| 7914 | * the later date, but do not actually probe at this time. |
| 7915 | */ |
| 7916 | if (time_is_after_jiffies(timeout)) { |
| 7917 | mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); |
| 7918 | return; |
| 7919 | } |
| 7920 | |
| 7921 | wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); |
| 7922 | } |
| 7923 | |
| 7924 | static void ieee80211_sta_monitor_work(struct wiphy *wiphy, |
| 7925 | struct wiphy_work *work) |
| 7926 | { |
| 7927 | struct ieee80211_sub_if_data *sdata = |
| 7928 | container_of(work, struct ieee80211_sub_if_data, |
| 7929 | u.mgd.monitor_work); |
| 7930 | |
| 7931 | ieee80211_mgd_probe_ap(sdata, false); |
| 7932 | } |
| 7933 | |
| 7934 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
| 7935 | { |
| 7936 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
| 7937 | __ieee80211_stop_poll(sdata); |
| 7938 | |
| 7939 | /* let's probe the connection once */ |
| 7940 | if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) |
| 7941 | wiphy_work_queue(sdata->local->hw.wiphy, |
| 7942 | &sdata->u.mgd.monitor_work); |
| 7943 | } |
| 7944 | } |
| 7945 | |
| 7946 | #ifdef CONFIG_PM |
| 7947 | void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) |
| 7948 | { |
| 7949 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 7950 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
| 7951 | |
| 7952 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 7953 | |
| 7954 | if (ifmgd->auth_data || ifmgd->assoc_data) { |
| 7955 | const u8 *ap_addr = ifmgd->auth_data ? |
| 7956 | ifmgd->auth_data->ap_addr : |
| 7957 | ifmgd->assoc_data->ap_addr; |
| 7958 | |
| 7959 | /* |
| 7960 | * If we are trying to authenticate / associate while suspending, |
| 7961 | * cfg80211 won't know and won't actually abort those attempts, |
| 7962 | * thus we need to do that ourselves. |
| 7963 | */ |
| 7964 | ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, |
| 7965 | IEEE80211_STYPE_DEAUTH, |
| 7966 | WLAN_REASON_DEAUTH_LEAVING, |
| 7967 | false, frame_buf); |
| 7968 | if (ifmgd->assoc_data) |
| 7969 | ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); |
| 7970 | if (ifmgd->auth_data) |
| 7971 | ieee80211_destroy_auth_data(sdata, false); |
| 7972 | cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, |
| 7973 | IEEE80211_DEAUTH_FRAME_LEN, |
| 7974 | false); |
| 7975 | } |
| 7976 | |
| 7977 | /* This is a bit of a hack - we should find a better and more generic |
| 7978 | * solution to this. Normally when suspending, cfg80211 will in fact |
| 7979 | * deauthenticate. However, it doesn't (and cannot) stop an ongoing |
| 7980 | * auth (not so important) or assoc (this is the problem) process. |
| 7981 | * |
| 7982 | * As a consequence, it can happen that we are in the process of both |
| 7983 | * associating and suspending, and receive an association response |
| 7984 | * after cfg80211 has checked if it needs to disconnect, but before |
| 7985 | * we actually set the flag to drop incoming frames. This will then |
| 7986 | * cause the workqueue flush to process the association response in |
| 7987 | * the suspend, resulting in a successful association just before it |
| 7988 | * tries to remove the interface from the driver, which now though |
| 7989 | * has a channel context assigned ... this results in issues. |
| 7990 | * |
| 7991 | * To work around this (for now) simply deauth here again if we're |
| 7992 | * now connected. |
| 7993 | */ |
| 7994 | if (ifmgd->associated && !sdata->local->wowlan) { |
| 7995 | u8 bssid[ETH_ALEN]; |
| 7996 | struct cfg80211_deauth_request req = { |
| 7997 | .reason_code = WLAN_REASON_DEAUTH_LEAVING, |
| 7998 | .bssid = bssid, |
| 7999 | }; |
| 8000 | |
| 8001 | memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); |
| 8002 | ieee80211_mgd_deauth(sdata, &req); |
| 8003 | } |
| 8004 | } |
| 8005 | #endif |
| 8006 | |
| 8007 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) |
| 8008 | { |
| 8009 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 8010 | |
| 8011 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 8012 | |
| 8013 | if (!ifmgd->associated) |
| 8014 | return; |
| 8015 | |
| 8016 | if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { |
| 8017 | sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; |
| 8018 | mlme_dbg(sdata, "driver requested disconnect after resume\n"); |
| 8019 | ieee80211_sta_connection_lost(sdata, |
| 8020 | WLAN_REASON_UNSPECIFIED, |
| 8021 | true); |
| 8022 | return; |
| 8023 | } |
| 8024 | |
| 8025 | if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { |
| 8026 | sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; |
| 8027 | mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); |
| 8028 | ieee80211_sta_connection_lost(sdata, |
| 8029 | WLAN_REASON_UNSPECIFIED, |
| 8030 | true); |
| 8031 | return; |
| 8032 | } |
| 8033 | } |
| 8034 | |
| 8035 | static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, |
| 8036 | struct wiphy_work *work) |
| 8037 | { |
| 8038 | struct ieee80211_link_data *link = |
| 8039 | container_of(work, struct ieee80211_link_data, |
| 8040 | u.mgd.request_smps_work); |
| 8041 | |
| 8042 | __ieee80211_request_smps_mgd(link->sdata, link, |
| 8043 | link->u.mgd.driver_smps_mode); |
| 8044 | } |
| 8045 | |
| 8046 | /* interface setup */ |
| 8047 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) |
| 8048 | { |
| 8049 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 8050 | |
| 8051 | wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
| 8052 | wiphy_work_init(&ifmgd->beacon_connection_loss_work, |
| 8053 | ieee80211_beacon_connection_loss_work); |
| 8054 | wiphy_work_init(&ifmgd->csa_connection_drop_work, |
| 8055 | ieee80211_csa_connection_drop_work); |
| 8056 | wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, |
| 8057 | ieee80211_tdls_peer_del_work); |
| 8058 | wiphy_delayed_work_init(&ifmgd->ml_reconf_work, |
| 8059 | ieee80211_ml_reconf_work); |
| 8060 | timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); |
| 8061 | timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); |
| 8062 | timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); |
| 8063 | wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, |
| 8064 | ieee80211_sta_handle_tspec_ac_params_wk); |
| 8065 | wiphy_delayed_work_init(&ifmgd->ttlm_work, |
| 8066 | ieee80211_tid_to_link_map_work); |
| 8067 | wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, |
| 8068 | ieee80211_neg_ttlm_timeout_work); |
| 8069 | wiphy_work_init(&ifmgd->teardown_ttlm_work, |
| 8070 | ieee80211_teardown_ttlm_work); |
| 8071 | |
| 8072 | ifmgd->flags = 0; |
| 8073 | ifmgd->powersave = sdata->wdev.ps; |
| 8074 | ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; |
| 8075 | ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; |
| 8076 | /* Setup TDLS data */ |
| 8077 | spin_lock_init(&ifmgd->teardown_lock); |
| 8078 | ifmgd->teardown_skb = NULL; |
| 8079 | ifmgd->orig_teardown_skb = NULL; |
| 8080 | ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; |
| 8081 | } |
| 8082 | |
| 8083 | static void ieee80211_recalc_smps_work(struct wiphy *wiphy, |
| 8084 | struct wiphy_work *work) |
| 8085 | { |
| 8086 | struct ieee80211_link_data *link = |
| 8087 | container_of(work, struct ieee80211_link_data, |
| 8088 | u.mgd.recalc_smps); |
| 8089 | |
| 8090 | ieee80211_recalc_smps(link->sdata, link); |
| 8091 | } |
| 8092 | |
| 8093 | void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) |
| 8094 | { |
| 8095 | struct ieee80211_sub_if_data *sdata = link->sdata; |
| 8096 | struct ieee80211_local *local = sdata->local; |
| 8097 | unsigned int link_id = link->link_id; |
| 8098 | |
| 8099 | link->u.mgd.p2p_noa_index = -1; |
| 8100 | link->conf->bssid = link->u.mgd.bssid; |
| 8101 | link->smps_mode = IEEE80211_SMPS_OFF; |
| 8102 | |
| 8103 | wiphy_work_init(&link->u.mgd.request_smps_work, |
| 8104 | ieee80211_request_smps_mgd_work); |
| 8105 | wiphy_work_init(&link->u.mgd.recalc_smps, |
| 8106 | ieee80211_recalc_smps_work); |
| 8107 | if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) |
| 8108 | link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; |
| 8109 | else |
| 8110 | link->u.mgd.req_smps = IEEE80211_SMPS_OFF; |
| 8111 | |
| 8112 | wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, |
| 8113 | ieee80211_csa_switch_work); |
| 8114 | |
| 8115 | ieee80211_clear_tpe(&link->conf->tpe); |
| 8116 | |
| 8117 | if (sdata->u.mgd.assoc_data) |
| 8118 | ether_addr_copy(link->conf->addr, |
| 8119 | sdata->u.mgd.assoc_data->link[link_id].addr); |
| 8120 | else if (!is_valid_ether_addr(link->conf->addr)) |
| 8121 | eth_random_addr(link->conf->addr); |
| 8122 | } |
| 8123 | |
| 8124 | /* scan finished notification */ |
| 8125 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) |
| 8126 | { |
| 8127 | struct ieee80211_sub_if_data *sdata; |
| 8128 | |
| 8129 | /* Restart STA timers */ |
| 8130 | rcu_read_lock(); |
| 8131 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| 8132 | if (ieee80211_sdata_running(sdata)) |
| 8133 | ieee80211_restart_sta_timer(sdata); |
| 8134 | } |
| 8135 | rcu_read_unlock(); |
| 8136 | } |
| 8137 | |
| 8138 | static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, |
| 8139 | struct cfg80211_bss *cbss, s8 link_id, |
| 8140 | const u8 *ap_mld_addr, bool assoc, |
| 8141 | struct ieee80211_conn_settings *conn, |
| 8142 | bool override) |
| 8143 | { |
| 8144 | struct ieee80211_local *local = sdata->local; |
| 8145 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 8146 | struct ieee80211_bss *bss = (void *)cbss->priv; |
| 8147 | struct sta_info *new_sta = NULL; |
| 8148 | struct ieee80211_link_data *link; |
| 8149 | bool have_sta = false; |
| 8150 | bool mlo; |
| 8151 | int err; |
| 8152 | |
| 8153 | if (link_id >= 0) { |
| 8154 | mlo = true; |
| 8155 | if (WARN_ON(!ap_mld_addr)) |
| 8156 | return -EINVAL; |
| 8157 | err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); |
| 8158 | } else { |
| 8159 | if (WARN_ON(ap_mld_addr)) |
| 8160 | return -EINVAL; |
| 8161 | ap_mld_addr = cbss->bssid; |
| 8162 | err = ieee80211_vif_set_links(sdata, 0, 0); |
| 8163 | link_id = 0; |
| 8164 | mlo = false; |
| 8165 | } |
| 8166 | |
| 8167 | if (err) |
| 8168 | return err; |
| 8169 | |
| 8170 | link = sdata_dereference(sdata->link[link_id], sdata); |
| 8171 | if (WARN_ON(!link)) { |
| 8172 | err = -ENOLINK; |
| 8173 | goto out_err; |
| 8174 | } |
| 8175 | |
| 8176 | if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { |
| 8177 | err = -EINVAL; |
| 8178 | goto out_err; |
| 8179 | } |
| 8180 | |
| 8181 | /* If a reconfig is happening, bail out */ |
| 8182 | if (local->in_reconfig) { |
| 8183 | err = -EBUSY; |
| 8184 | goto out_err; |
| 8185 | } |
| 8186 | |
| 8187 | if (assoc) { |
| 8188 | rcu_read_lock(); |
| 8189 | have_sta = sta_info_get(sdata, ap_mld_addr); |
| 8190 | rcu_read_unlock(); |
| 8191 | } |
| 8192 | |
| 8193 | if (!have_sta) { |
| 8194 | if (mlo) |
| 8195 | new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, |
| 8196 | link_id, cbss->bssid, |
| 8197 | GFP_KERNEL); |
| 8198 | else |
| 8199 | new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); |
| 8200 | |
| 8201 | if (!new_sta) { |
| 8202 | err = -ENOMEM; |
| 8203 | goto out_err; |
| 8204 | } |
| 8205 | |
| 8206 | new_sta->sta.mlo = mlo; |
| 8207 | } |
| 8208 | |
| 8209 | /* |
| 8210 | * Set up the information for the new channel before setting the |
| 8211 | * new channel. We can't - completely race-free - change the basic |
| 8212 | * rates bitmap and the channel (sband) that it refers to, but if |
| 8213 | * we set it up before we at least avoid calling into the driver's |
| 8214 | * bss_info_changed() method with invalid information (since we do |
| 8215 | * call that from changing the channel - only for IDLE and perhaps |
| 8216 | * some others, but ...). |
| 8217 | * |
| 8218 | * So to avoid that, just set up all the new information before the |
| 8219 | * channel, but tell the driver to apply it only afterwards, since |
| 8220 | * it might need the new channel for that. |
| 8221 | */ |
| 8222 | if (new_sta) { |
| 8223 | const struct cfg80211_bss_ies *ies; |
| 8224 | struct link_sta_info *link_sta; |
| 8225 | |
| 8226 | rcu_read_lock(); |
| 8227 | link_sta = rcu_dereference(new_sta->link[link_id]); |
| 8228 | if (WARN_ON(!link_sta)) { |
| 8229 | rcu_read_unlock(); |
| 8230 | sta_info_free(local, new_sta); |
| 8231 | err = -EINVAL; |
| 8232 | goto out_err; |
| 8233 | } |
| 8234 | |
| 8235 | err = ieee80211_mgd_setup_link_sta(link, new_sta, |
| 8236 | link_sta, cbss); |
| 8237 | if (err) { |
| 8238 | rcu_read_unlock(); |
| 8239 | sta_info_free(local, new_sta); |
| 8240 | goto out_err; |
| 8241 | } |
| 8242 | |
| 8243 | memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); |
| 8244 | |
| 8245 | /* set timing information */ |
| 8246 | link->conf->beacon_int = cbss->beacon_interval; |
| 8247 | ies = rcu_dereference(cbss->beacon_ies); |
| 8248 | if (ies) { |
| 8249 | link->conf->sync_tsf = ies->tsf; |
| 8250 | link->conf->sync_device_ts = |
| 8251 | bss->device_ts_beacon; |
| 8252 | |
| 8253 | ieee80211_get_dtim(ies, |
| 8254 | &link->conf->sync_dtim_count, |
| 8255 | NULL); |
| 8256 | } else if (!ieee80211_hw_check(&sdata->local->hw, |
| 8257 | TIMING_BEACON_ONLY)) { |
| 8258 | ies = rcu_dereference(cbss->proberesp_ies); |
| 8259 | /* must be non-NULL since beacon IEs were NULL */ |
| 8260 | link->conf->sync_tsf = ies->tsf; |
| 8261 | link->conf->sync_device_ts = |
| 8262 | bss->device_ts_presp; |
| 8263 | link->conf->sync_dtim_count = 0; |
| 8264 | } else { |
| 8265 | link->conf->sync_tsf = 0; |
| 8266 | link->conf->sync_device_ts = 0; |
| 8267 | link->conf->sync_dtim_count = 0; |
| 8268 | } |
| 8269 | rcu_read_unlock(); |
| 8270 | } |
| 8271 | |
| 8272 | if (new_sta || override) { |
| 8273 | /* |
| 8274 | * Only set this if we're also going to calculate the AP |
| 8275 | * settings etc., otherwise this was set before in a |
| 8276 | * previous call. Note override is set to %true in assoc |
| 8277 | * if the settings were changed. |
| 8278 | */ |
| 8279 | link->u.mgd.conn = *conn; |
| 8280 | err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, |
| 8281 | mlo, &link->u.mgd.conn); |
| 8282 | if (err) { |
| 8283 | if (new_sta) |
| 8284 | sta_info_free(local, new_sta); |
| 8285 | goto out_err; |
| 8286 | } |
| 8287 | /* pass out for use in assoc */ |
| 8288 | *conn = link->u.mgd.conn; |
| 8289 | } |
| 8290 | |
| 8291 | if (new_sta) { |
| 8292 | /* |
| 8293 | * tell driver about BSSID, basic rates and timing |
| 8294 | * this was set up above, before setting the channel |
| 8295 | */ |
| 8296 | ieee80211_link_info_change_notify(sdata, link, |
| 8297 | BSS_CHANGED_BSSID | |
| 8298 | BSS_CHANGED_BASIC_RATES | |
| 8299 | BSS_CHANGED_BEACON_INT); |
| 8300 | |
| 8301 | if (assoc) |
| 8302 | sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); |
| 8303 | |
| 8304 | err = sta_info_insert(new_sta); |
| 8305 | new_sta = NULL; |
| 8306 | if (err) { |
| 8307 | sdata_info(sdata, |
| 8308 | "failed to insert STA entry for the AP (error %d)\n", |
| 8309 | err); |
| 8310 | goto out_release_chan; |
| 8311 | } |
| 8312 | } else |
| 8313 | WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); |
| 8314 | |
| 8315 | /* Cancel scan to ensure that nothing interferes with connection */ |
| 8316 | if (local->scanning) |
| 8317 | ieee80211_scan_cancel(local); |
| 8318 | |
| 8319 | return 0; |
| 8320 | |
| 8321 | out_release_chan: |
| 8322 | ieee80211_link_release_channel(link); |
| 8323 | out_err: |
| 8324 | ieee80211_vif_set_links(sdata, 0, 0); |
| 8325 | return err; |
| 8326 | } |
| 8327 | |
| 8328 | static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, |
| 8329 | const struct cfg80211_bss_ies *ies, |
| 8330 | u8 cur_channel, bool ignore_ecsa) |
| 8331 | { |
| 8332 | const struct element *csa_elem, *ecsa_elem; |
| 8333 | struct ieee80211_channel_sw_ie *csa = NULL; |
| 8334 | struct ieee80211_ext_chansw_ie *ecsa = NULL; |
| 8335 | |
| 8336 | if (!ies) |
| 8337 | return false; |
| 8338 | |
| 8339 | csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, |
| 8340 | ies->data, ies->len); |
| 8341 | if (csa_elem && csa_elem->datalen == sizeof(*csa)) |
| 8342 | csa = (void *)csa_elem->data; |
| 8343 | |
| 8344 | ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, |
| 8345 | ies->data, ies->len); |
| 8346 | if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) |
| 8347 | ecsa = (void *)ecsa_elem->data; |
| 8348 | |
| 8349 | if (csa && csa->count == 0) |
| 8350 | csa = NULL; |
| 8351 | if (csa && !csa->mode && csa->new_ch_num == cur_channel) |
| 8352 | csa = NULL; |
| 8353 | |
| 8354 | if (ecsa && ecsa->count == 0) |
| 8355 | ecsa = NULL; |
| 8356 | if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) |
| 8357 | ecsa = NULL; |
| 8358 | |
| 8359 | if (ignore_ecsa && ecsa) { |
| 8360 | sdata_info(sdata, |
| 8361 | "Ignoring ECSA in probe response - was considered stuck!\n"); |
| 8362 | return csa; |
| 8363 | } |
| 8364 | |
| 8365 | return csa || ecsa; |
| 8366 | } |
| 8367 | |
| 8368 | static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, |
| 8369 | struct cfg80211_bss *bss) |
| 8370 | { |
| 8371 | u8 cur_channel; |
| 8372 | bool ret; |
| 8373 | |
| 8374 | cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); |
| 8375 | |
| 8376 | rcu_read_lock(); |
| 8377 | if (ieee80211_mgd_csa_present(sdata, |
| 8378 | rcu_dereference(bss->beacon_ies), |
| 8379 | cur_channel, false)) { |
| 8380 | ret = true; |
| 8381 | goto out; |
| 8382 | } |
| 8383 | |
| 8384 | if (ieee80211_mgd_csa_present(sdata, |
| 8385 | rcu_dereference(bss->proberesp_ies), |
| 8386 | cur_channel, bss->proberesp_ecsa_stuck)) { |
| 8387 | ret = true; |
| 8388 | goto out; |
| 8389 | } |
| 8390 | |
| 8391 | ret = false; |
| 8392 | out: |
| 8393 | rcu_read_unlock(); |
| 8394 | return ret; |
| 8395 | } |
| 8396 | |
| 8397 | /* config hooks */ |
| 8398 | int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, |
| 8399 | struct cfg80211_auth_request *req) |
| 8400 | { |
| 8401 | struct ieee80211_local *local = sdata->local; |
| 8402 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 8403 | struct ieee80211_mgd_auth_data *auth_data; |
| 8404 | struct ieee80211_conn_settings conn; |
| 8405 | struct ieee80211_link_data *link; |
| 8406 | struct ieee80211_supported_band *sband; |
| 8407 | struct ieee80211_bss *bss; |
| 8408 | u16 auth_alg; |
| 8409 | int err; |
| 8410 | bool cont_auth, wmm_used; |
| 8411 | |
| 8412 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
| 8413 | |
| 8414 | /* prepare auth data structure */ |
| 8415 | |
| 8416 | switch (req->auth_type) { |
| 8417 | case NL80211_AUTHTYPE_OPEN_SYSTEM: |
| 8418 | auth_alg = WLAN_AUTH_OPEN; |
| 8419 | break; |
| 8420 | case NL80211_AUTHTYPE_SHARED_KEY: |
| 8421 | if (fips_enabled) |
| 8422 | return -EOPNOTSUPP; |
| 8423 | auth_alg = WLAN_AUTH_SHARED_KEY; |
| 8424 | break; |
| 8425 | case NL80211_AUTHTYPE_FT: |
| 8426 | auth_alg = WLAN_AUTH_FT; |
| 8427 | break; |
| 8428 | case NL80211_AUTHTYPE_NETWORK_EAP: |
| 8429 | auth_alg = WLAN_AUTH_LEAP; |
| 8430 | break; |
| 8431 | case NL80211_AUTHTYPE_SAE: |
| 8432 | auth_alg = WLAN_AUTH_SAE; |
| 8433 | break; |
| 8434 | case NL80211_AUTHTYPE_FILS_SK: |
| 8435 | auth_alg = WLAN_AUTH_FILS_SK; |
| 8436 | break; |
| 8437 | case NL80211_AUTHTYPE_FILS_SK_PFS: |
| 8438 | auth_alg = WLAN_AUTH_FILS_SK_PFS; |
| 8439 | break; |
| 8440 | case NL80211_AUTHTYPE_FILS_PK: |
| 8441 | auth_alg = WLAN_AUTH_FILS_PK; |
| 8442 | break; |
| 8443 | default: |
| 8444 | return -EOPNOTSUPP; |
| 8445 | } |
| 8446 | |
| 8447 | if (ifmgd->assoc_data) |
| 8448 | return -EBUSY; |
| 8449 | |
| 8450 | if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { |
| 8451 | sdata_info(sdata, "AP is in CSA process, reject auth\n"); |
| 8452 | return -EINVAL; |
| 8453 | } |
| 8454 | |
| 8455 | auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + |
| 8456 | req->ie_len, GFP_KERNEL); |
| 8457 | if (!auth_data) |
| 8458 | return -ENOMEM; |
| 8459 | |
| 8460 | memcpy(auth_data->ap_addr, |
| 8461 | req->ap_mld_addr ?: req->bss->bssid, |
| 8462 | ETH_ALEN); |
| 8463 | auth_data->bss = req->bss; |
| 8464 | auth_data->link_id = req->link_id; |
| 8465 | |
| 8466 | if (req->auth_data_len >= 4) { |
| 8467 | if (req->auth_type == NL80211_AUTHTYPE_SAE) { |
| 8468 | __le16 *pos = (__le16 *) req->auth_data; |
| 8469 | |
| 8470 | auth_data->sae_trans = le16_to_cpu(pos[0]); |
| 8471 | auth_data->sae_status = le16_to_cpu(pos[1]); |
| 8472 | } |
| 8473 | memcpy(auth_data->data, req->auth_data + 4, |
| 8474 | req->auth_data_len - 4); |
| 8475 | auth_data->data_len += req->auth_data_len - 4; |
| 8476 | } |
| 8477 | |
| 8478 | /* Check if continuing authentication or trying to authenticate with the |
| 8479 | * same BSS that we were in the process of authenticating with and avoid |
| 8480 | * removal and re-addition of the STA entry in |
| 8481 | * ieee80211_prep_connection(). |
| 8482 | */ |
| 8483 | cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && |
| 8484 | ifmgd->auth_data->link_id == req->link_id; |
| 8485 | |
| 8486 | if (req->ie && req->ie_len) { |
| 8487 | memcpy(&auth_data->data[auth_data->data_len], |
| 8488 | req->ie, req->ie_len); |
| 8489 | auth_data->data_len += req->ie_len; |
| 8490 | } |
| 8491 | |
| 8492 | if (req->key && req->key_len) { |
| 8493 | auth_data->key_len = req->key_len; |
| 8494 | auth_data->key_idx = req->key_idx; |
| 8495 | memcpy(auth_data->key, req->key, req->key_len); |
| 8496 | } |
| 8497 | |
| 8498 | auth_data->algorithm = auth_alg; |
| 8499 | |
| 8500 | /* try to authenticate/probe */ |
| 8501 | |
| 8502 | if (ifmgd->auth_data) { |
| 8503 | if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { |
| 8504 | auth_data->peer_confirmed = |
| 8505 | ifmgd->auth_data->peer_confirmed; |
| 8506 | } |
| 8507 | ieee80211_destroy_auth_data(sdata, cont_auth); |
| 8508 | } |
| 8509 | |
| 8510 | /* prep auth_data so we don't go into idle on disassoc */ |
| 8511 | ifmgd->auth_data = auth_data; |
| 8512 | |
| 8513 | /* If this is continuation of an ongoing SAE authentication exchange |
| 8514 | * (i.e., request to send SAE Confirm) and the peer has already |
| 8515 | * confirmed, mark authentication completed since we are about to send |
| 8516 | * out SAE Confirm. |
| 8517 | */ |
| 8518 | if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && |
| 8519 | auth_data->peer_confirmed && auth_data->sae_trans == 2) |
| 8520 | ieee80211_mark_sta_auth(sdata); |
| 8521 | |
| 8522 | if (ifmgd->associated) { |
| 8523 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
| 8524 | |
| 8525 | sdata_info(sdata, |
| 8526 | "disconnect from AP %pM for new auth to %pM\n", |
| 8527 | sdata->vif.cfg.ap_addr, auth_data->ap_addr); |
| 8528 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
| 8529 | WLAN_REASON_UNSPECIFIED, |
| 8530 | false, frame_buf); |
| 8531 | |
| 8532 | ieee80211_report_disconnect(sdata, frame_buf, |
| 8533 | sizeof(frame_buf), true, |
| 8534 | WLAN_REASON_UNSPECIFIED, |
| 8535 | false); |
| 8536 | } |
| 8537 | |
| 8538 | /* needed for transmitting the auth frame(s) properly */ |
| 8539 | memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); |
| 8540 | |
| 8541 | bss = (void *)req->bss->priv; |
| 8542 | wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); |
| 8543 | |
| 8544 | sband = local->hw.wiphy->bands[req->bss->channel->band]; |
| 8545 | |
| 8546 | ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, |
| 8547 | &conn); |
| 8548 | |
| 8549 | err = ieee80211_prep_connection(sdata, req->bss, req->link_id, |
| 8550 | req->ap_mld_addr, cont_auth, |
| 8551 | &conn, false); |
| 8552 | if (err) |
| 8553 | goto err_clear; |
| 8554 | |
| 8555 | if (req->link_id >= 0) |
| 8556 | link = sdata_dereference(sdata->link[req->link_id], sdata); |
| 8557 | else |
| 8558 | link = &sdata->deflink; |
| 8559 | |
| 8560 | if (WARN_ON(!link)) { |
| 8561 | err = -ENOLINK; |
| 8562 | goto err_clear; |
| 8563 | } |
| 8564 | |
| 8565 | sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", |
| 8566 | auth_data->ap_addr, link->conf->addr); |
| 8567 | |
| 8568 | err = ieee80211_auth(sdata); |
| 8569 | if (err) { |
| 8570 | sta_info_destroy_addr(sdata, auth_data->ap_addr); |
| 8571 | goto err_clear; |
| 8572 | } |
| 8573 | |
| 8574 | /* hold our own reference */ |
| 8575 | cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); |
| 8576 | return 0; |
| 8577 | |
| 8578 | err_clear: |
| 8579 | if (!ieee80211_vif_is_mld(&sdata->vif)) { |
| 8580 | eth_zero_addr(sdata->deflink.u.mgd.bssid); |
| 8581 | ieee80211_link_info_change_notify(sdata, &sdata->deflink, |
| 8582 | BSS_CHANGED_BSSID); |
| 8583 | ieee80211_link_release_channel(&sdata->deflink); |
| 8584 | } |
| 8585 | ifmgd->auth_data = NULL; |
| 8586 | kfree(auth_data); |
| 8587 | return err; |
| 8588 | } |
| 8589 | |
| 8590 | static void |
| 8591 | ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, |
| 8592 | struct ieee80211_mgd_assoc_data *assoc_data, |
| 8593 | struct cfg80211_assoc_request *req, |
| 8594 | struct ieee80211_conn_settings *conn, |
| 8595 | unsigned int link_id) |
| 8596 | { |
| 8597 | struct ieee80211_local *local = sdata->local; |
| 8598 | const struct cfg80211_bss_ies *bss_ies; |
| 8599 | struct ieee80211_supported_band *sband; |
| 8600 | struct ieee80211_link_data *link; |
| 8601 | struct cfg80211_bss *cbss; |
| 8602 | struct ieee80211_bss *bss; |
| 8603 | |
| 8604 | cbss = assoc_data->link[link_id].bss; |
| 8605 | if (WARN_ON(!cbss)) |
| 8606 | return; |
| 8607 | |
| 8608 | bss = (void *)cbss->priv; |
| 8609 | |
| 8610 | sband = local->hw.wiphy->bands[cbss->channel->band]; |
| 8611 | if (WARN_ON(!sband)) |
| 8612 | return; |
| 8613 | |
| 8614 | link = sdata_dereference(sdata->link[link_id], sdata); |
| 8615 | if (WARN_ON(!link)) |
| 8616 | return; |
| 8617 | |
| 8618 | /* for MLO connections assume advertising all rates is OK */ |
| 8619 | if (!req->ap_mld_addr) { |
| 8620 | assoc_data->supp_rates = bss->supp_rates; |
| 8621 | assoc_data->supp_rates_len = bss->supp_rates_len; |
| 8622 | } |
| 8623 | |
| 8624 | /* copy and link elems for the STA profile */ |
| 8625 | if (req->links[link_id].elems_len) { |
| 8626 | memcpy(assoc_data->ie_pos, req->links[link_id].elems, |
| 8627 | req->links[link_id].elems_len); |
| 8628 | assoc_data->link[link_id].elems = assoc_data->ie_pos; |
| 8629 | assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; |
| 8630 | assoc_data->ie_pos += req->links[link_id].elems_len; |
| 8631 | } |
| 8632 | |
| 8633 | link->u.mgd.beacon_crc_valid = false; |
| 8634 | link->u.mgd.dtim_period = 0; |
| 8635 | link->u.mgd.have_beacon = false; |
| 8636 | |
| 8637 | /* override HT configuration only if the AP and we support it */ |
| 8638 | if (conn->mode >= IEEE80211_CONN_MODE_HT) { |
| 8639 | struct ieee80211_sta_ht_cap sta_ht_cap; |
| 8640 | |
| 8641 | memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); |
| 8642 | ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); |
| 8643 | } |
| 8644 | |
| 8645 | rcu_read_lock(); |
| 8646 | bss_ies = rcu_dereference(cbss->beacon_ies); |
| 8647 | if (bss_ies) { |
| 8648 | u8 dtim_count = 0; |
| 8649 | |
| 8650 | ieee80211_get_dtim(bss_ies, &dtim_count, |
| 8651 | &link->u.mgd.dtim_period); |
| 8652 | |
| 8653 | sdata->deflink.u.mgd.have_beacon = true; |
| 8654 | |
| 8655 | if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { |
| 8656 | link->conf->sync_tsf = bss_ies->tsf; |
| 8657 | link->conf->sync_device_ts = bss->device_ts_beacon; |
| 8658 | link->conf->sync_dtim_count = dtim_count; |
| 8659 | } |
| 8660 | } else { |
| 8661 | bss_ies = rcu_dereference(cbss->ies); |
| 8662 | } |
| 8663 | |
| 8664 | if (bss_ies) { |
| 8665 | const struct element *elem; |
| 8666 | |
| 8667 | elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, |
| 8668 | bss_ies->data, bss_ies->len); |
| 8669 | if (elem && elem->datalen >= 3) |
| 8670 | link->conf->profile_periodicity = elem->data[2]; |
| 8671 | else |
| 8672 | link->conf->profile_periodicity = 0; |
| 8673 | |
| 8674 | elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, |
| 8675 | bss_ies->data, bss_ies->len); |
| 8676 | if (elem && elem->datalen >= 11 && |
| 8677 | (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) |
| 8678 | link->conf->ema_ap = true; |
| 8679 | else |
| 8680 | link->conf->ema_ap = false; |
| 8681 | } |
| 8682 | rcu_read_unlock(); |
| 8683 | |
| 8684 | if (bss->corrupt_data) { |
| 8685 | char *corrupt_type = "data"; |
| 8686 | |
| 8687 | if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { |
| 8688 | if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) |
| 8689 | corrupt_type = "beacon and probe response"; |
| 8690 | else |
| 8691 | corrupt_type = "beacon"; |
| 8692 | } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { |
| 8693 | corrupt_type = "probe response"; |
| 8694 | } |
| 8695 | sdata_info(sdata, "associating to AP %pM with corrupt %s\n", |
| 8696 | cbss->bssid, corrupt_type); |
| 8697 | } |
| 8698 | |
| 8699 | if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { |
| 8700 | if (sdata->u.mgd.powersave) |
| 8701 | link->smps_mode = IEEE80211_SMPS_DYNAMIC; |
| 8702 | else |
| 8703 | link->smps_mode = IEEE80211_SMPS_OFF; |
| 8704 | } else { |
| 8705 | link->smps_mode = link->u.mgd.req_smps; |
| 8706 | } |
| 8707 | } |
| 8708 | |
| 8709 | static int |
| 8710 | ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, |
| 8711 | struct ieee80211_mgd_assoc_data *assoc_data, |
| 8712 | int link_id) |
| 8713 | { |
| 8714 | struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; |
| 8715 | enum nl80211_band band = cbss->channel->band; |
| 8716 | struct ieee80211_supported_band *sband; |
| 8717 | const struct element *elem; |
| 8718 | int err; |
| 8719 | |
| 8720 | /* neither HT nor VHT elements used on 6 GHz */ |
| 8721 | if (band == NL80211_BAND_6GHZ) |
| 8722 | return 0; |
| 8723 | |
| 8724 | if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) |
| 8725 | return 0; |
| 8726 | |
| 8727 | rcu_read_lock(); |
| 8728 | elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); |
| 8729 | if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { |
| 8730 | mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", |
| 8731 | cbss->bssid); |
| 8732 | err = -EINVAL; |
| 8733 | goto out_rcu; |
| 8734 | } |
| 8735 | assoc_data->link[link_id].ap_ht_param = |
| 8736 | ((struct ieee80211_ht_operation *)(elem->data))->ht_param; |
| 8737 | rcu_read_unlock(); |
| 8738 | |
| 8739 | if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) |
| 8740 | return 0; |
| 8741 | |
| 8742 | /* some drivers want to support VHT on 2.4 GHz even */ |
| 8743 | sband = sdata->local->hw.wiphy->bands[band]; |
| 8744 | if (!sband->vht_cap.vht_supported) |
| 8745 | return 0; |
| 8746 | |
| 8747 | rcu_read_lock(); |
| 8748 | elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); |
| 8749 | /* but even then accept it not being present on the AP */ |
| 8750 | if (!elem && band == NL80211_BAND_2GHZ) { |
| 8751 | err = 0; |
| 8752 | goto out_rcu; |
| 8753 | } |
| 8754 | if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { |
| 8755 | mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", |
| 8756 | cbss->bssid); |
| 8757 | err = -EINVAL; |
| 8758 | goto out_rcu; |
| 8759 | } |
| 8760 | memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, |
| 8761 | sizeof(struct ieee80211_vht_cap)); |
| 8762 | rcu_read_unlock(); |
| 8763 | |
| 8764 | return 0; |
| 8765 | out_rcu: |
| 8766 | rcu_read_unlock(); |
| 8767 | return err; |
| 8768 | } |
| 8769 | |
| 8770 | int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
| 8771 | struct cfg80211_assoc_request *req) |
| 8772 | { |
| 8773 | unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; |
| 8774 | struct ieee80211_local *local = sdata->local; |
| 8775 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 8776 | struct ieee80211_mgd_assoc_data *assoc_data; |
| 8777 | const struct element *ssid_elem; |
| 8778 | struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; |
| 8779 | struct ieee80211_link_data *link; |
| 8780 | struct cfg80211_bss *cbss; |
| 8781 | bool override, uapsd_supported; |
| 8782 | bool match_auth; |
| 8783 | int i, err; |
| 8784 | size_t size = sizeof(*assoc_data) + req->ie_len; |
| 8785 | |
| 8786 | for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) |
| 8787 | size += req->links[i].elems_len; |
| 8788 | |
| 8789 | /* FIXME: no support for 4-addr MLO yet */ |
| 8790 | if (sdata->u.mgd.use_4addr && req->link_id >= 0) |
| 8791 | return -EOPNOTSUPP; |
| 8792 | |
| 8793 | assoc_data = kzalloc(size, GFP_KERNEL); |
| 8794 | if (!assoc_data) |
| 8795 | return -ENOMEM; |
| 8796 | |
| 8797 | cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; |
| 8798 | |
| 8799 | if (ieee80211_mgd_csa_in_process(sdata, cbss)) { |
| 8800 | sdata_info(sdata, "AP is in CSA process, reject assoc\n"); |
| 8801 | err = -EINVAL; |
| 8802 | goto err_free; |
| 8803 | } |
| 8804 | |
| 8805 | rcu_read_lock(); |
| 8806 | ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); |
| 8807 | if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { |
| 8808 | rcu_read_unlock(); |
| 8809 | err = -EINVAL; |
| 8810 | goto err_free; |
| 8811 | } |
| 8812 | |
| 8813 | memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); |
| 8814 | assoc_data->ssid_len = ssid_elem->datalen; |
| 8815 | rcu_read_unlock(); |
| 8816 | |
| 8817 | if (req->ap_mld_addr) |
| 8818 | memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); |
| 8819 | else |
| 8820 | memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); |
| 8821 | |
| 8822 | if (ifmgd->associated) { |
| 8823 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
| 8824 | |
| 8825 | sdata_info(sdata, |
| 8826 | "disconnect from AP %pM for new assoc to %pM\n", |
| 8827 | sdata->vif.cfg.ap_addr, assoc_data->ap_addr); |
| 8828 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
| 8829 | WLAN_REASON_UNSPECIFIED, |
| 8830 | false, frame_buf); |
| 8831 | |
| 8832 | ieee80211_report_disconnect(sdata, frame_buf, |
| 8833 | sizeof(frame_buf), true, |
| 8834 | WLAN_REASON_UNSPECIFIED, |
| 8835 | false); |
| 8836 | } |
| 8837 | |
| 8838 | memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); |
| 8839 | memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, |
| 8840 | sizeof(ifmgd->ht_capa_mask)); |
| 8841 | |
| 8842 | memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); |
| 8843 | memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, |
| 8844 | sizeof(ifmgd->vht_capa_mask)); |
| 8845 | |
| 8846 | memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); |
| 8847 | memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, |
| 8848 | sizeof(ifmgd->s1g_capa_mask)); |
| 8849 | |
| 8850 | /* keep some setup (AP STA, channel, ...) if matching */ |
| 8851 | match_auth = ifmgd->auth_data && |
| 8852 | ether_addr_equal(ifmgd->auth_data->ap_addr, |
| 8853 | assoc_data->ap_addr) && |
| 8854 | ifmgd->auth_data->link_id == req->link_id; |
| 8855 | |
| 8856 | if (req->ap_mld_addr) { |
| 8857 | uapsd_supported = true; |
| 8858 | |
| 8859 | if (req->flags & (ASSOC_REQ_DISABLE_HT | |
| 8860 | ASSOC_REQ_DISABLE_VHT | |
| 8861 | ASSOC_REQ_DISABLE_HE | |
| 8862 | ASSOC_REQ_DISABLE_EHT)) { |
| 8863 | err = -EINVAL; |
| 8864 | goto err_free; |
| 8865 | } |
| 8866 | |
| 8867 | for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { |
| 8868 | struct ieee80211_supported_band *sband; |
| 8869 | struct cfg80211_bss *link_cbss = req->links[i].bss; |
| 8870 | struct ieee80211_bss *bss; |
| 8871 | |
| 8872 | if (!link_cbss) |
| 8873 | continue; |
| 8874 | |
| 8875 | bss = (void *)link_cbss->priv; |
| 8876 | |
| 8877 | if (!bss->wmm_used) { |
| 8878 | err = -EINVAL; |
| 8879 | req->links[i].error = err; |
| 8880 | goto err_free; |
| 8881 | } |
| 8882 | |
| 8883 | if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { |
| 8884 | err = -EINVAL; |
| 8885 | req->links[i].error = err; |
| 8886 | goto err_free; |
| 8887 | } |
| 8888 | |
| 8889 | link = sdata_dereference(sdata->link[i], sdata); |
| 8890 | if (link) |
| 8891 | ether_addr_copy(assoc_data->link[i].addr, |
| 8892 | link->conf->addr); |
| 8893 | else |
| 8894 | eth_random_addr(assoc_data->link[i].addr); |
| 8895 | sband = local->hw.wiphy->bands[link_cbss->channel->band]; |
| 8896 | |
| 8897 | if (match_auth && i == assoc_link_id && link) |
| 8898 | assoc_data->link[i].conn = link->u.mgd.conn; |
| 8899 | else |
| 8900 | assoc_data->link[i].conn = |
| 8901 | ieee80211_conn_settings_unlimited; |
| 8902 | ieee80211_determine_our_sta_mode_assoc(sdata, sband, |
| 8903 | req, true, i, |
| 8904 | &assoc_data->link[i].conn); |
| 8905 | assoc_data->link[i].bss = link_cbss; |
| 8906 | assoc_data->link[i].disabled = req->links[i].disabled; |
| 8907 | |
| 8908 | if (!bss->uapsd_supported) |
| 8909 | uapsd_supported = false; |
| 8910 | |
| 8911 | if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { |
| 8912 | err = -EINVAL; |
| 8913 | req->links[i].error = err; |
| 8914 | goto err_free; |
| 8915 | } |
| 8916 | |
| 8917 | err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, |
| 8918 | assoc_data, i); |
| 8919 | if (err) { |
| 8920 | err = -EINVAL; |
| 8921 | req->links[i].error = err; |
| 8922 | goto err_free; |
| 8923 | } |
| 8924 | } |
| 8925 | |
| 8926 | assoc_data->wmm = true; |
| 8927 | } else { |
| 8928 | struct ieee80211_supported_band *sband; |
| 8929 | struct ieee80211_bss *bss = (void *)cbss->priv; |
| 8930 | |
| 8931 | memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); |
| 8932 | assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; |
| 8933 | |
| 8934 | assoc_data->wmm = bss->wmm_used && |
| 8935 | (local->hw.queues >= IEEE80211_NUM_ACS); |
| 8936 | |
| 8937 | if (cbss->channel->band == NL80211_BAND_6GHZ && |
| 8938 | req->flags & (ASSOC_REQ_DISABLE_HT | |
| 8939 | ASSOC_REQ_DISABLE_VHT | |
| 8940 | ASSOC_REQ_DISABLE_HE)) { |
| 8941 | err = -EINVAL; |
| 8942 | goto err_free; |
| 8943 | } |
| 8944 | |
| 8945 | sband = local->hw.wiphy->bands[cbss->channel->band]; |
| 8946 | |
| 8947 | assoc_data->link[0].bss = cbss; |
| 8948 | |
| 8949 | if (match_auth) |
| 8950 | assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; |
| 8951 | else |
| 8952 | assoc_data->link[0].conn = |
| 8953 | ieee80211_conn_settings_unlimited; |
| 8954 | ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, |
| 8955 | assoc_data->wmm, 0, |
| 8956 | &assoc_data->link[0].conn); |
| 8957 | |
| 8958 | uapsd_supported = bss->uapsd_supported; |
| 8959 | |
| 8960 | err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); |
| 8961 | if (err) |
| 8962 | goto err_free; |
| 8963 | } |
| 8964 | |
| 8965 | assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; |
| 8966 | |
| 8967 | if (ifmgd->auth_data && !ifmgd->auth_data->done) { |
| 8968 | err = -EBUSY; |
| 8969 | goto err_free; |
| 8970 | } |
| 8971 | |
| 8972 | if (ifmgd->assoc_data) { |
| 8973 | err = -EBUSY; |
| 8974 | goto err_free; |
| 8975 | } |
| 8976 | |
| 8977 | /* Cleanup is delayed if auth_data matches */ |
| 8978 | if (ifmgd->auth_data && !match_auth) |
| 8979 | ieee80211_destroy_auth_data(sdata, false); |
| 8980 | |
| 8981 | if (req->ie && req->ie_len) { |
| 8982 | memcpy(assoc_data->ie, req->ie, req->ie_len); |
| 8983 | assoc_data->ie_len = req->ie_len; |
| 8984 | assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; |
| 8985 | } else { |
| 8986 | assoc_data->ie_pos = assoc_data->ie; |
| 8987 | } |
| 8988 | |
| 8989 | if (req->fils_kek) { |
| 8990 | /* should already be checked in cfg80211 - so warn */ |
| 8991 | if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { |
| 8992 | err = -EINVAL; |
| 8993 | goto err_free; |
| 8994 | } |
| 8995 | memcpy(assoc_data->fils_kek, req->fils_kek, |
| 8996 | req->fils_kek_len); |
| 8997 | assoc_data->fils_kek_len = req->fils_kek_len; |
| 8998 | } |
| 8999 | |
| 9000 | if (req->fils_nonces) |
| 9001 | memcpy(assoc_data->fils_nonces, req->fils_nonces, |
| 9002 | 2 * FILS_NONCE_LEN); |
| 9003 | |
| 9004 | /* default timeout */ |
| 9005 | assoc_data->timeout = jiffies; |
| 9006 | assoc_data->timeout_started = true; |
| 9007 | |
| 9008 | assoc_data->assoc_link_id = assoc_link_id; |
| 9009 | |
| 9010 | if (req->ap_mld_addr) { |
| 9011 | /* if there was no authentication, set up the link */ |
| 9012 | err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); |
| 9013 | if (err) |
| 9014 | goto err_clear; |
| 9015 | } |
| 9016 | |
| 9017 | link = sdata_dereference(sdata->link[assoc_link_id], sdata); |
| 9018 | if (WARN_ON(!link)) { |
| 9019 | err = -EINVAL; |
| 9020 | goto err_clear; |
| 9021 | } |
| 9022 | |
| 9023 | override = link->u.mgd.conn.mode != |
| 9024 | assoc_data->link[assoc_link_id].conn.mode || |
| 9025 | link->u.mgd.conn.bw_limit != |
| 9026 | assoc_data->link[assoc_link_id].conn.bw_limit; |
| 9027 | link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; |
| 9028 | |
| 9029 | ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, |
| 9030 | assoc_link_id); |
| 9031 | |
| 9032 | if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && |
| 9033 | ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), |
| 9034 | "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) |
| 9035 | sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; |
| 9036 | |
| 9037 | if (assoc_data->wmm && uapsd_supported && |
| 9038 | (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { |
| 9039 | assoc_data->uapsd = true; |
| 9040 | ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; |
| 9041 | } else { |
| 9042 | assoc_data->uapsd = false; |
| 9043 | ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; |
| 9044 | } |
| 9045 | |
| 9046 | if (req->prev_bssid) |
| 9047 | memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); |
| 9048 | |
| 9049 | if (req->use_mfp) { |
| 9050 | ifmgd->mfp = IEEE80211_MFP_REQUIRED; |
| 9051 | ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; |
| 9052 | } else { |
| 9053 | ifmgd->mfp = IEEE80211_MFP_DISABLED; |
| 9054 | ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; |
| 9055 | } |
| 9056 | |
| 9057 | if (req->flags & ASSOC_REQ_USE_RRM) |
| 9058 | ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; |
| 9059 | else |
| 9060 | ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; |
| 9061 | |
| 9062 | if (req->crypto.control_port) |
| 9063 | ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; |
| 9064 | else |
| 9065 | ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; |
| 9066 | |
| 9067 | sdata->control_port_protocol = req->crypto.control_port_ethertype; |
| 9068 | sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; |
| 9069 | sdata->control_port_over_nl80211 = |
| 9070 | req->crypto.control_port_over_nl80211; |
| 9071 | sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; |
| 9072 | |
| 9073 | /* kick off associate process */ |
| 9074 | ifmgd->assoc_data = assoc_data; |
| 9075 | |
| 9076 | for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { |
| 9077 | if (!assoc_data->link[i].bss) |
| 9078 | continue; |
| 9079 | if (i == assoc_data->assoc_link_id) |
| 9080 | continue; |
| 9081 | /* only calculate the mode, hence link == NULL */ |
| 9082 | err = ieee80211_prep_channel(sdata, NULL, i, |
| 9083 | assoc_data->link[i].bss, true, |
| 9084 | &assoc_data->link[i].conn); |
| 9085 | if (err) { |
| 9086 | req->links[i].error = err; |
| 9087 | goto err_clear; |
| 9088 | } |
| 9089 | } |
| 9090 | |
| 9091 | memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); |
| 9092 | vif_cfg->ssid_len = assoc_data->ssid_len; |
| 9093 | |
| 9094 | /* needed for transmitting the assoc frames properly */ |
| 9095 | memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); |
| 9096 | |
| 9097 | err = ieee80211_prep_connection(sdata, cbss, req->link_id, |
| 9098 | req->ap_mld_addr, true, |
| 9099 | &assoc_data->link[assoc_link_id].conn, |
| 9100 | override); |
| 9101 | if (err) |
| 9102 | goto err_clear; |
| 9103 | |
| 9104 | if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { |
| 9105 | const struct cfg80211_bss_ies *beacon_ies; |
| 9106 | |
| 9107 | rcu_read_lock(); |
| 9108 | beacon_ies = rcu_dereference(req->bss->beacon_ies); |
| 9109 | if (!beacon_ies) { |
| 9110 | /* |
| 9111 | * Wait up to one beacon interval ... |
| 9112 | * should this be more if we miss one? |
| 9113 | */ |
| 9114 | sdata_info(sdata, "waiting for beacon from %pM\n", |
| 9115 | link->u.mgd.bssid); |
| 9116 | assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); |
| 9117 | assoc_data->timeout_started = true; |
| 9118 | assoc_data->need_beacon = true; |
| 9119 | } |
| 9120 | rcu_read_unlock(); |
| 9121 | } |
| 9122 | |
| 9123 | run_again(sdata, assoc_data->timeout); |
| 9124 | |
| 9125 | /* We are associating, clean up auth_data */ |
| 9126 | if (ifmgd->auth_data) |
| 9127 | ieee80211_destroy_auth_data(sdata, true); |
| 9128 | |
| 9129 | return 0; |
| 9130 | err_clear: |
| 9131 | if (!ifmgd->auth_data) { |
| 9132 | eth_zero_addr(sdata->deflink.u.mgd.bssid); |
| 9133 | ieee80211_link_info_change_notify(sdata, &sdata->deflink, |
| 9134 | BSS_CHANGED_BSSID); |
| 9135 | } |
| 9136 | ifmgd->assoc_data = NULL; |
| 9137 | err_free: |
| 9138 | kfree(assoc_data); |
| 9139 | return err; |
| 9140 | } |
| 9141 | |
| 9142 | int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, |
| 9143 | struct cfg80211_deauth_request *req) |
| 9144 | { |
| 9145 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 9146 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
| 9147 | bool tx = !req->local_state_change; |
| 9148 | struct ieee80211_prep_tx_info info = { |
| 9149 | .subtype = IEEE80211_STYPE_DEAUTH, |
| 9150 | }; |
| 9151 | |
| 9152 | if (ifmgd->auth_data && |
| 9153 | ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { |
| 9154 | sdata_info(sdata, |
| 9155 | "aborting authentication with %pM by local choice (Reason: %u=%s)\n", |
| 9156 | req->bssid, req->reason_code, |
| 9157 | ieee80211_get_reason_code_string(req->reason_code)); |
| 9158 | |
| 9159 | info.link_id = ifmgd->auth_data->link_id; |
| 9160 | drv_mgd_prepare_tx(sdata->local, sdata, &info); |
| 9161 | ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, |
| 9162 | IEEE80211_STYPE_DEAUTH, |
| 9163 | req->reason_code, tx, |
| 9164 | frame_buf); |
| 9165 | ieee80211_destroy_auth_data(sdata, false); |
| 9166 | ieee80211_report_disconnect(sdata, frame_buf, |
| 9167 | sizeof(frame_buf), true, |
| 9168 | req->reason_code, false); |
| 9169 | drv_mgd_complete_tx(sdata->local, sdata, &info); |
| 9170 | return 0; |
| 9171 | } |
| 9172 | |
| 9173 | if (ifmgd->assoc_data && |
| 9174 | ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { |
| 9175 | sdata_info(sdata, |
| 9176 | "aborting association with %pM by local choice (Reason: %u=%s)\n", |
| 9177 | req->bssid, req->reason_code, |
| 9178 | ieee80211_get_reason_code_string(req->reason_code)); |
| 9179 | |
| 9180 | info.link_id = ifmgd->assoc_data->assoc_link_id; |
| 9181 | drv_mgd_prepare_tx(sdata->local, sdata, &info); |
| 9182 | ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, |
| 9183 | IEEE80211_STYPE_DEAUTH, |
| 9184 | req->reason_code, tx, |
| 9185 | frame_buf); |
| 9186 | ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); |
| 9187 | ieee80211_report_disconnect(sdata, frame_buf, |
| 9188 | sizeof(frame_buf), true, |
| 9189 | req->reason_code, false); |
| 9190 | drv_mgd_complete_tx(sdata->local, sdata, &info); |
| 9191 | return 0; |
| 9192 | } |
| 9193 | |
| 9194 | if (ifmgd->associated && |
| 9195 | ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { |
| 9196 | sdata_info(sdata, |
| 9197 | "deauthenticating from %pM by local choice (Reason: %u=%s)\n", |
| 9198 | req->bssid, req->reason_code, |
| 9199 | ieee80211_get_reason_code_string(req->reason_code)); |
| 9200 | |
| 9201 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
| 9202 | req->reason_code, tx, frame_buf); |
| 9203 | ieee80211_report_disconnect(sdata, frame_buf, |
| 9204 | sizeof(frame_buf), true, |
| 9205 | req->reason_code, false); |
| 9206 | drv_mgd_complete_tx(sdata->local, sdata, &info); |
| 9207 | return 0; |
| 9208 | } |
| 9209 | |
| 9210 | return -ENOTCONN; |
| 9211 | } |
| 9212 | |
| 9213 | int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, |
| 9214 | struct cfg80211_disassoc_request *req) |
| 9215 | { |
| 9216 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
| 9217 | |
| 9218 | if (!sdata->u.mgd.associated || |
| 9219 | memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) |
| 9220 | return -ENOTCONN; |
| 9221 | |
| 9222 | sdata_info(sdata, |
| 9223 | "disassociating from %pM by local choice (Reason: %u=%s)\n", |
| 9224 | req->ap_addr, req->reason_code, |
| 9225 | ieee80211_get_reason_code_string(req->reason_code)); |
| 9226 | |
| 9227 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, |
| 9228 | req->reason_code, !req->local_state_change, |
| 9229 | frame_buf); |
| 9230 | |
| 9231 | ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, |
| 9232 | req->reason_code, false); |
| 9233 | |
| 9234 | return 0; |
| 9235 | } |
| 9236 | |
| 9237 | void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) |
| 9238 | { |
| 9239 | wiphy_work_cancel(link->sdata->local->hw.wiphy, |
| 9240 | &link->u.mgd.request_smps_work); |
| 9241 | wiphy_work_cancel(link->sdata->local->hw.wiphy, |
| 9242 | &link->u.mgd.recalc_smps); |
| 9243 | wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, |
| 9244 | &link->u.mgd.csa.switch_work); |
| 9245 | } |
| 9246 | |
| 9247 | void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) |
| 9248 | { |
| 9249 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 9250 | |
| 9251 | /* |
| 9252 | * Make sure some work items will not run after this, |
| 9253 | * they will not do anything but might not have been |
| 9254 | * cancelled when disconnecting. |
| 9255 | */ |
| 9256 | wiphy_work_cancel(sdata->local->hw.wiphy, |
| 9257 | &ifmgd->monitor_work); |
| 9258 | wiphy_work_cancel(sdata->local->hw.wiphy, |
| 9259 | &ifmgd->beacon_connection_loss_work); |
| 9260 | wiphy_work_cancel(sdata->local->hw.wiphy, |
| 9261 | &ifmgd->csa_connection_drop_work); |
| 9262 | wiphy_delayed_work_cancel(sdata->local->hw.wiphy, |
| 9263 | &ifmgd->tdls_peer_del_work); |
| 9264 | |
| 9265 | if (ifmgd->assoc_data) |
| 9266 | ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); |
| 9267 | if (ifmgd->auth_data) |
| 9268 | ieee80211_destroy_auth_data(sdata, false); |
| 9269 | spin_lock_bh(&ifmgd->teardown_lock); |
| 9270 | if (ifmgd->teardown_skb) { |
| 9271 | kfree_skb(ifmgd->teardown_skb); |
| 9272 | ifmgd->teardown_skb = NULL; |
| 9273 | ifmgd->orig_teardown_skb = NULL; |
| 9274 | } |
| 9275 | kfree(ifmgd->assoc_req_ies); |
| 9276 | ifmgd->assoc_req_ies = NULL; |
| 9277 | ifmgd->assoc_req_ies_len = 0; |
| 9278 | spin_unlock_bh(&ifmgd->teardown_lock); |
| 9279 | del_timer_sync(&ifmgd->timer); |
| 9280 | } |
| 9281 | |
| 9282 | void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, |
| 9283 | enum nl80211_cqm_rssi_threshold_event rssi_event, |
| 9284 | s32 rssi_level, |
| 9285 | gfp_t gfp) |
| 9286 | { |
| 9287 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 9288 | |
| 9289 | trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); |
| 9290 | |
| 9291 | cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); |
| 9292 | } |
| 9293 | EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); |
| 9294 | |
| 9295 | void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) |
| 9296 | { |
| 9297 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 9298 | |
| 9299 | trace_api_cqm_beacon_loss_notify(sdata->local, sdata); |
| 9300 | |
| 9301 | cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); |
| 9302 | } |
| 9303 | EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); |
| 9304 | |
| 9305 | static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, |
| 9306 | int rssi_min_thold, |
| 9307 | int rssi_max_thold) |
| 9308 | { |
| 9309 | trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); |
| 9310 | |
| 9311 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
| 9312 | return; |
| 9313 | |
| 9314 | /* |
| 9315 | * Scale up threshold values before storing it, as the RSSI averaging |
| 9316 | * algorithm uses a scaled up value as well. Change this scaling |
| 9317 | * factor if the RSSI averaging algorithm changes. |
| 9318 | */ |
| 9319 | sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; |
| 9320 | sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; |
| 9321 | } |
| 9322 | |
| 9323 | void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, |
| 9324 | int rssi_min_thold, |
| 9325 | int rssi_max_thold) |
| 9326 | { |
| 9327 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 9328 | |
| 9329 | WARN_ON(rssi_min_thold == rssi_max_thold || |
| 9330 | rssi_min_thold > rssi_max_thold); |
| 9331 | |
| 9332 | _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, |
| 9333 | rssi_max_thold); |
| 9334 | } |
| 9335 | EXPORT_SYMBOL(ieee80211_enable_rssi_reports); |
| 9336 | |
| 9337 | void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) |
| 9338 | { |
| 9339 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 9340 | |
| 9341 | _ieee80211_enable_rssi_reports(sdata, 0, 0); |
| 9342 | } |
| 9343 | EXPORT_SYMBOL(ieee80211_disable_rssi_reports); |