| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Johannes Berg | 29232 | 74.82% | 385 | 50.46% |
| Ilan Peer | 1565 | 4.01% | 21 | 2.75% |
| Ayala Beker | 1071 | 2.74% | 4 | 0.52% |
| Jouni Malinen | 783 | 2.00% | 31 | 4.06% |
| Luciano Coelho | 633 | 1.62% | 13 | 1.70% |
| Emmanuel Grumbach | 557 | 1.43% | 23 | 3.01% |
| Sara Sharon | 363 | 0.93% | 12 | 1.57% |
| Calvin Owens | 305 | 0.78% | 1 | 0.13% |
| Arik Nemtsov | 272 | 0.70% | 10 | 1.31% |
| Thomas Pedersen | 263 | 0.67% | 11 | 1.44% |
| Felix Fietkau | 237 | 0.61% | 9 | 1.18% |
| Eliad Peller | 207 | 0.53% | 17 | 2.23% |
| Jiri Benc | 199 | 0.51% | 1 | 0.13% |
| Ben Greear | 191 | 0.49% | 8 | 1.05% |
| Steinar H. Gunderson | 181 | 0.46% | 2 | 0.26% |
| Mordechai Goodstein | 179 | 0.46% | 3 | 0.39% |
| Michal Kazior | 175 | 0.45% | 7 | 0.92% |
| Juuso Oikarinen | 171 | 0.44% | 10 | 1.31% |
| Stanislaw Gruszka | 137 | 0.35% | 8 | 1.05% |
| Kalle Valo | 123 | 0.31% | 9 | 1.18% |
| Wen Gong | 119 | 0.30% | 5 | 0.66% |
| striebit | 118 | 0.30% | 7 | 0.92% |
| Simon Wunderlich | 116 | 0.30% | 5 | 0.66% |
| Miri Korenblit | 116 | 0.30% | 2 | 0.26% |
| Haim Dreyfuss | 115 | 0.29% | 3 | 0.39% |
| Chaya Rachel Ivgy | 114 | 0.29% | 2 | 0.26% |
| Benjamin Berg | 92 | 0.24% | 8 | 1.05% |
| Alexander Bondar | 85 | 0.22% | 7 | 0.92% |
| Luis R. Rodriguez | 85 | 0.22% | 5 | 0.66% |
| Liad Kaufman | 74 | 0.19% | 2 | 0.26% |
| Mahesh Palivela | 71 | 0.18% | 3 | 0.39% |
| Wang, Yu | 57 | 0.15% | 1 | 0.13% |
| Andrei Otcheretianski | 57 | 0.15% | 5 | 0.66% |
| Tosoni | 53 | 0.14% | 1 | 0.13% |
| Janusz Dziedzic | 50 | 0.13% | 5 | 0.66% |
| John Crispin | 47 | 0.12% | 3 | 0.39% |
| Eyal Shapira | 45 | 0.12% | 1 | 0.13% |
| Brian Norris | 39 | 0.10% | 1 | 0.13% |
| Jiasheng Jiang | 38 | 0.10% | 1 | 0.13% |
| Paul Stewart | 33 | 0.08% | 2 | 0.26% |
| Jason Young | 29 | 0.07% | 1 | 0.13% |
| David Spinadel | 28 | 0.07% | 3 | 0.39% |
| Moshe Benji | 26 | 0.07% | 1 | 0.13% |
| Meenakshi Venkataraman | 25 | 0.06% | 1 | 0.13% |
| Kees Cook | 24 | 0.06% | 1 | 0.13% |
| Jasper Bryant-Greene | 23 | 0.06% | 1 | 0.13% |
| Guy Eilam | 23 | 0.06% | 1 | 0.13% |
| Rajkumar Manoharan | 22 | 0.06% | 5 | 0.66% |
| Chun-Yeow Yeoh | 21 | 0.05% | 1 | 0.13% |
| Assaf Krauss | 20 | 0.05% | 1 | 0.13% |
| Denis Kenzior | 20 | 0.05% | 2 | 0.26% |
| Loic Poulain | 19 | 0.05% | 2 | 0.26% |
| Vivek Natarajan | 19 | 0.05% | 3 | 0.39% |
| Mohammed Shafi Shajakhan | 19 | 0.05% | 1 | 0.13% |
| Will Deacon | 18 | 0.05% | 1 | 0.13% |
| Joe Perches | 17 | 0.04% | 3 | 0.39% |
| Pontus Fuchs | 15 | 0.04% | 1 | 0.13% |
| Avri Altman | 14 | 0.04% | 1 | 0.13% |
| Muna Sinada | 13 | 0.03% | 1 | 0.13% |
| Ron Rindjunsky | 12 | 0.03% | 3 | 0.39% |
| Maxim Levitsky | 11 | 0.03% | 2 | 0.26% |
| Andrzej Zaborowski | 11 | 0.03% | 3 | 0.39% |
| Helmut Schaa | 10 | 0.03% | 1 | 0.13% |
| Holger Schurig | 10 | 0.03% | 2 | 0.26% |
| Michael Wu | 10 | 0.03% | 1 | 0.13% |
| Ben Caradoc-Davies | 10 | 0.03% | 1 | 0.13% |
| Daniel Drake | 10 | 0.03% | 1 | 0.13% |
| Tomas Winkler | 10 | 0.03% | 2 | 0.26% |
| Lian Chen | 9 | 0.02% | 1 | 0.13% |
| Lorenzo Bianconi | 9 | 0.02% | 2 | 0.26% |
| Aloka Dixit | 9 | 0.02% | 2 | 0.26% |
| Youghandhar Chintala | 8 | 0.02% | 1 | 0.13% |
| Gustavo A. R. Silva | 8 | 0.02% | 2 | 0.26% |
| Alexei Avshalom Lazar | 8 | 0.02% | 1 | 0.13% |
| Antonio Quartulli | 7 | 0.02% | 1 | 0.13% |
| Nathan Errera | 7 | 0.02% | 1 | 0.13% |
| Yoni Divinsky | 7 | 0.02% | 1 | 0.13% |
| James Prestwood | 7 | 0.02% | 1 | 0.13% |
| Ronald Wahl | 6 | 0.02% | 1 | 0.13% |
| Markus Theil | 6 | 0.02% | 2 | 0.26% |
| Sujith Manoharan | 6 | 0.02% | 2 | 0.26% |
| Anjaneyulu | 6 | 0.02% | 1 | 0.13% |
| Luis Carlos Cobo Rus | 6 | 0.02% | 2 | 0.26% |
| Vasanthakumar Thiagarajan | 6 | 0.02% | 2 | 0.26% |
| John W. Linville | 6 | 0.02% | 4 | 0.52% |
| Vladimir Koutny | 6 | 0.02% | 2 | 0.26% |
| Tova Mussai | 6 | 0.02% | 1 | 0.13% |
| Denys Vlasenko | 5 | 0.01% | 1 | 0.13% |
| Bruno Randolf | 5 | 0.01% | 2 | 0.26% |
| Mattias Nissler | 5 | 0.01% | 2 | 0.26% |
| Aviya Erenfeld | 5 | 0.01% | 1 | 0.13% |
| Soumik Das | 5 | 0.01% | 1 | 0.13% |
| Linus Torvalds | 4 | 0.01% | 2 | 0.26% |
| Paul Gortmaker | 4 | 0.01% | 2 | 0.26% |
| Rafael Mendonca | 4 | 0.01% | 1 | 0.13% |
| Sriram R | 4 | 0.01% | 1 | 0.13% |
| Ard Biesheuvel | 4 | 0.01% | 1 | 0.13% |
| Veerendranath Jakkam | 4 | 0.01% | 2 | 0.26% |
| Daniel Gabay | 3 | 0.01% | 1 | 0.13% |
| Vidyullatha Kanchanapally | 3 | 0.01% | 1 | 0.13% |
| Srinivasan Raju | 3 | 0.01% | 1 | 0.13% |
| Arkadiusz Miskiewicz | 3 | 0.01% | 1 | 0.13% |
| P Praneesh | 3 | 0.01% | 1 | 0.13% |
| Geert Uytterhoeven | 3 | 0.01% | 1 | 0.13% |
| Eric Dumazet | 2 | 0.01% | 1 | 0.13% |
| Linus Torvalds (pre-git) | 2 | 0.01% | 1 | 0.13% |
| Michael Buesch | 2 | 0.01% | 1 | 0.13% |
| Harvey Harrison | 2 | 0.01% | 1 | 0.13% |
| Karl Beldan | 1 | 0.00% | 1 | 0.13% |
| Alexander Simon | 1 | 0.00% | 1 | 0.13% |
| Max Stepanov | 1 | 0.00% | 1 | 0.13% |
| Christian Lamparter | 1 | 0.00% | 1 | 0.13% |
| Chris Wright | 1 | 0.00% | 1 | 0.13% |
| Zheng Yongjun | 1 | 0.00% | 1 | 0.13% |
| Total | 39071 | 763 |
// SPDX-License-Identifier: GPL-2.0-only /* * BSS client mode implementation * Copyright 2003-2008, Jouni Malinen <j@w1.fi> * Copyright 2004, Instant802 Networks, Inc. * Copyright 2005, Devicescape Software, Inc. * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> * Copyright 2007, Michael Wu <flamingice@sourmilk.net> * Copyright 2013-2014 Intel Mobile Communications GmbH * Copyright (C) 2015 - 2017 Intel Deutschland GmbH * Copyright (C) 2018 - 2024 Intel Corporation */ #include <linux/delay.h> #include <linux/fips.h> #include <linux/if_ether.h> #include <linux/skbuff.h> #include <linux/if_arp.h> #include <linux/etherdevice.h> #include <linux/moduleparam.h> #include <linux/rtnetlink.h> #include <linux/crc32.h> #include <linux/slab.h> #include <linux/export.h> #include <net/mac80211.h> #include <asm/unaligned.h> #include "ieee80211_i.h" #include "driver-ops.h" #include "rate.h" #include "led.h" #include "fils_aead.h" #define IEEE80211_AUTH_TIMEOUT (HZ / 5) #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) #define IEEE80211_AUTH_MAX_TRIES 3 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) #define IEEE80211_ASSOC_MAX_TRIES 3 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100) #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 static int max_nullfunc_tries = 2; module_param(max_nullfunc_tries, int, 0644); MODULE_PARM_DESC(max_nullfunc_tries, "Maximum nullfunc tx tries before disconnecting (reason 4)."); static int max_probe_tries = 5; module_param(max_probe_tries, int, 0644); MODULE_PARM_DESC(max_probe_tries, "Maximum probe tries before disconnecting (reason 4)."); /* * Beacon loss timeout is calculated as N frames times the * advertised beacon interval. This may need to be somewhat * higher than what hardware might detect to account for * delays in the host processing frames. But since we also * probe on beacon miss before declaring the connection lost * default to what we want. */ static int beacon_loss_count = 7; module_param(beacon_loss_count, int, 0644); MODULE_PARM_DESC(beacon_loss_count, "Number of beacon intervals before we decide beacon was lost."); /* * Time the connection can be idle before we probe * it to see if we can still talk to the AP. */ #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) /* * Time we wait for a probe response after sending * a probe request because of beacon loss or for * checking the connection still works. */ static int probe_wait_ms = 500; module_param(probe_wait_ms, int, 0644); MODULE_PARM_DESC(probe_wait_ms, "Maximum time(ms) to wait for probe response" " before disconnecting (reason 4)."); /* * How many Beacon frames need to have been used in average signal strength * before starting to indicate signal change events. */ #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 /* * Extract from the given disabled subchannel bitmap (raw format * from the EHT Operation Element) the bits for the subchannel * we're using right now. */ static u16 ieee80211_extract_dis_subch_bmap(const struct ieee80211_eht_operation *eht_oper, struct cfg80211_chan_def *chandef, u16 bitmap) { struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional; struct cfg80211_chan_def ap_chandef = *chandef; u32 ap_center_freq, local_center_freq; u32 ap_bw, local_bw; int ap_start_freq, local_start_freq; u16 shift, mask; if (!(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) || !(eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) return 0; /* set 160/320 supported to get the full AP definition */ ieee80211_chandef_eht_oper((const void *)eht_oper->optional, true, true, &ap_chandef); ap_center_freq = ap_chandef.center_freq1; ap_bw = 20 * BIT(u8_get_bits(info->control, IEEE80211_EHT_OPER_CHAN_WIDTH)); ap_start_freq = ap_center_freq - ap_bw / 2; local_center_freq = chandef->center_freq1; local_bw = 20 * BIT(ieee80211_chan_width_to_rx_bw(chandef->width)); local_start_freq = local_center_freq - local_bw / 2; shift = (local_start_freq - ap_start_freq) / 20; mask = BIT(local_bw / 20) - 1; return (bitmap >> shift) & mask; } /* * Handle the puncturing bitmap, possibly downgrading bandwidth to get a * valid bitmap. */ static void ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data *link, const struct ieee80211_eht_operation *eht_oper, u16 bitmap, u64 *changed) { struct cfg80211_chan_def *chandef = &link->conf->chandef; struct ieee80211_local *local = link->sdata->local; u16 extracted; u64 _changed = 0; if (!changed) changed = &_changed; while (chandef->width > NL80211_CHAN_WIDTH_40) { extracted = ieee80211_extract_dis_subch_bmap(eht_oper, chandef, bitmap); if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, chandef) && !(bitmap && ieee80211_hw_check(&local->hw, DISALLOW_PUNCTURING))) break; link->u.mgd.conn_flags |= ieee80211_chandef_downgrade(chandef); *changed |= BSS_CHANGED_BANDWIDTH; } if (chandef->width <= NL80211_CHAN_WIDTH_40) extracted = 0; if (link->conf->eht_puncturing != extracted) { link->conf->eht_puncturing = extracted; *changed |= BSS_CHANGED_EHT_PUNCTURING; } } /* * We can have multiple work items (and connection probing) * scheduling this timer, but we need to take care to only * reschedule it when it should fire _earlier_ than it was * asked for before, or if it's not pending right now. This * function ensures that. Note that it then is required to * run this function for all timeouts after the first one * has happened -- the work that runs from this timer will * do that. */ static void run_again(struct ieee80211_sub_if_data *sdata, unsigned long timeout) { lockdep_assert_wiphy(sdata->local->hw.wiphy); if (!timer_pending(&sdata->u.mgd.timer) || time_before(timeout, sdata->u.mgd.timer.expires)) mod_timer(&sdata->u.mgd.timer, timeout); } void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) { if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) return; if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) return; mod_timer(&sdata->u.mgd.bcn_mon_timer, round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); } void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; if (unlikely(!ifmgd->associated)) return; if (ifmgd->probe_send_count) ifmgd->probe_send_count = 0; if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) return; mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); } static int ecw2cw(int ecw) { return (1 << ecw) - 1; } static ieee80211_conn_flags_t ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, struct ieee80211_link_data *link, ieee80211_conn_flags_t conn_flags, struct ieee80211_supported_band *sband, struct ieee80211_channel *channel, u32 vht_cap_info, const struct ieee80211_ht_operation *ht_oper, const struct ieee80211_vht_operation *vht_oper, const struct ieee80211_he_operation *he_oper, const struct ieee80211_eht_operation *eht_oper, const struct ieee80211_s1g_oper_ie *s1g_oper, struct cfg80211_chan_def *chandef, bool tracking) { struct cfg80211_chan_def vht_chandef; struct ieee80211_sta_ht_cap sta_ht_cap; ieee80211_conn_flags_t ret; u32 ht_cfreq; memset(chandef, 0, sizeof(struct cfg80211_chan_def)); chandef->chan = channel; chandef->width = NL80211_CHAN_WIDTH_20_NOHT; chandef->center_freq1 = channel->center_freq; chandef->freq1_offset = channel->freq_offset; if (channel->band == NL80211_BAND_6GHZ) { if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper, chandef)) { mlme_dbg(sdata, "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n"); ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT | IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; } else { ret = 0; } vht_chandef = *chandef; goto out; } else if (sband->band == NL80211_BAND_S1GHZ) { if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { sdata_info(sdata, "Missing S1G Operation Element? Trying operating == primary\n"); chandef->width = ieee80211_s1g_channel_width(channel); } ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ | IEEE80211_CONN_DISABLE_VHT | IEEE80211_CONN_DISABLE_80P80MHZ | IEEE80211_CONN_DISABLE_160MHZ; goto out; } memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); if (!ht_oper || !sta_ht_cap.ht_supported) { mlme_dbg(sdata, "HT operation missing / HT not supported\n"); ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT | IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; goto out; } chandef->width = NL80211_CHAN_WIDTH_20; ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, channel->band); /* check that channel matches the right operating channel */ if (!tracking && channel->center_freq != ht_cfreq) { /* * It's possible that some APs are confused here; * Netgear WNDR3700 sometimes reports 4 higher than * the actual channel in association responses, but * since we look at probe response/beacon data here * it should be OK. */ sdata_info(sdata, "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", channel->center_freq, ht_cfreq, ht_oper->primary_chan, channel->band); ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT | IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; goto out; } /* check 40 MHz support, if we have it */ if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { ieee80211_chandef_ht_oper(ht_oper, chandef); } else { mlme_dbg(sdata, "40 MHz not supported\n"); /* 40 MHz (and 80 MHz) must be supported for VHT */ ret = IEEE80211_CONN_DISABLE_VHT; /* also mark 40 MHz disabled */ ret |= IEEE80211_CONN_DISABLE_40MHZ; goto out; } if (!vht_oper || !sband->vht_cap.vht_supported) { mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); ret = IEEE80211_CONN_DISABLE_VHT; goto out; } vht_chandef = *chandef; if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) && he_oper && (le32_to_cpu(he_oper->he_oper_params) & IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { struct ieee80211_vht_operation he_oper_vht_cap; /* * Set only first 3 bytes (other 2 aren't used in * ieee80211_chandef_vht_oper() anyway) */ memcpy(&he_oper_vht_cap, he_oper->optional, 3); he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, &he_oper_vht_cap, ht_oper, &vht_chandef)) { if (!(conn_flags & IEEE80211_CONN_DISABLE_HE)) sdata_info(sdata, "HE AP VHT information is invalid, disabling HE\n"); ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; goto out; } } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, vht_oper, ht_oper, &vht_chandef)) { if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) sdata_info(sdata, "AP VHT information is invalid, disabling VHT\n"); ret = IEEE80211_CONN_DISABLE_VHT; goto out; } if (!cfg80211_chandef_valid(&vht_chandef)) { if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) sdata_info(sdata, "AP VHT information is invalid, disabling VHT\n"); ret = IEEE80211_CONN_DISABLE_VHT; goto out; } if (cfg80211_chandef_identical(chandef, &vht_chandef)) { ret = 0; goto out; } if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) sdata_info(sdata, "AP VHT information doesn't match HT, disabling VHT\n"); ret = IEEE80211_CONN_DISABLE_VHT; goto out; } *chandef = vht_chandef; /* * handle the case that the EHT operation indicates that it holds EHT * operation information (in case that the channel width differs from * the channel width reported in HT/VHT/HE). */ if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { struct cfg80211_chan_def eht_chandef = *chandef; ieee80211_chandef_eht_oper((const void *)eht_oper->optional, eht_chandef.width == NL80211_CHAN_WIDTH_160, false, &eht_chandef); if (!cfg80211_chandef_valid(&eht_chandef)) { if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) sdata_info(sdata, "AP EHT information is invalid, disabling EHT\n"); ret = IEEE80211_CONN_DISABLE_EHT; goto out; } if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) sdata_info(sdata, "AP EHT information is incompatible, disabling EHT\n"); ret = IEEE80211_CONN_DISABLE_EHT; goto out; } *chandef = eht_chandef; } ret = 0; out: /* * When tracking the current AP, don't do any further checks if the * new chandef is identical to the one we're currently using for the * connection. This keeps us from playing ping-pong with regulatory, * without it the following can happen (for example): * - connect to an AP with 80 MHz, world regdom allows 80 MHz * - AP advertises regdom US * - CRDA loads regdom US with 80 MHz prohibited (old database) * - the code below detects an unsupported channel, downgrades, and * we disconnect from the AP in the caller * - disconnect causes CRDA to reload world regdomain and the game * starts anew. * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) * * It seems possible that there are still scenarios with CSA or real * bandwidth changes where a this could happen, but those cases are * less common and wouldn't completely prevent using the AP. */ if (tracking && cfg80211_chandef_identical(chandef, &link->conf->chandef)) return ret; /* don't print the message below for VHT mismatch if VHT is disabled */ if (ret & IEEE80211_CONN_DISABLE_VHT) vht_chandef = *chandef; /* * Ignore the DISABLED flag when we're already connected and only * tracking the APs beacon for bandwidth changes - otherwise we * might get disconnected here if we connect to an AP, update our * regulatory information based on the AP's country IE and the * information we have is wrong/outdated and disables the channel * that we're actually using for the connection to the AP. */ while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, tracking ? 0 : IEEE80211_CHAN_DISABLED)) { if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT | IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; break; } ret |= ieee80211_chandef_downgrade(chandef); } if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, IEEE80211_CHAN_NO_HE)) ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, IEEE80211_CHAN_NO_EHT)) ret |= IEEE80211_CONN_DISABLE_EHT; if (chandef->width != vht_chandef.width && !tracking) sdata_info(sdata, "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); return ret; } static int ieee80211_config_bw(struct ieee80211_link_data *link, const struct ieee80211_ht_cap *ht_cap, const struct ieee80211_vht_cap *vht_cap, const struct ieee80211_ht_operation *ht_oper, const struct ieee80211_vht_operation *vht_oper, const struct ieee80211_he_operation *he_oper, const struct ieee80211_eht_operation *eht_oper, const struct ieee80211_s1g_oper_ie *s1g_oper, const u8 *bssid, u64 *changed) { struct ieee80211_sub_if_data *sdata = link->sdata; struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_channel *chan = link->conf->chandef.chan; struct ieee80211_supported_band *sband = local->hw.wiphy->bands[chan->band]; struct cfg80211_chan_def chandef; u16 ht_opmode; ieee80211_conn_flags_t flags; u32 vht_cap_info = 0; int ret; /* if HT was/is disabled, don't track any bandwidth changes */ if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper) return 0; /* don't check VHT if we associated as non-VHT station */ if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) vht_oper = NULL; /* don't check HE if we associated as non-HE station */ if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE || !ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif)) { he_oper = NULL; eht_oper = NULL; } /* don't check EHT if we associated as non-EHT station */ if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT || !ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif)) eht_oper = NULL; /* * if bss configuration changed store the new one - * this may be applicable even if channel is identical */ ht_opmode = le16_to_cpu(ht_oper->operation_mode); if (link->conf->ht_operation_mode != ht_opmode) { *changed |= BSS_CHANGED_HT; link->conf->ht_operation_mode = ht_opmode; } if (vht_cap) vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); /* calculate new channel (type) based on HT/VHT/HE operation IEs */ flags = ieee80211_determine_chantype(sdata, link, link->u.mgd.conn_flags, sband, chan, vht_cap_info, ht_oper, vht_oper, he_oper, eht_oper, s1g_oper, &chandef, true); /* * Downgrade the new channel if we associated with restricted * capabilities. For example, if we associated as a 20 MHz STA * to a 40 MHz AP (due to regulatory, capabilities or config * reasons) then switching to a 40 MHz channel now won't do us * any good -- we couldn't use it with the AP. */ if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ && chandef.width == NL80211_CHAN_WIDTH_80P80) flags |= ieee80211_chandef_downgrade(&chandef); if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ && chandef.width == NL80211_CHAN_WIDTH_160) flags |= ieee80211_chandef_downgrade(&chandef); if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ && chandef.width > NL80211_CHAN_WIDTH_20) flags |= ieee80211_chandef_downgrade(&chandef); if (cfg80211_chandef_identical(&chandef, &link->conf->chandef)) return 0; link_info(link, "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", link->u.mgd.bssid, chandef.chan->center_freq, chandef.chan->freq_offset, chandef.width, chandef.center_freq1, chandef.freq1_offset, chandef.center_freq2); if (flags != (link->u.mgd.conn_flags & (IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT | IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT | IEEE80211_CONN_DISABLE_40MHZ | IEEE80211_CONN_DISABLE_80P80MHZ | IEEE80211_CONN_DISABLE_160MHZ | IEEE80211_CONN_DISABLE_320MHZ)) || !cfg80211_chandef_valid(&chandef)) { sdata_info(sdata, "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", link->u.mgd.bssid, flags, ifmgd->flags); return -EINVAL; } ret = ieee80211_link_change_bandwidth(link, &chandef, changed); if (ret) { sdata_info(sdata, "AP %pM changed bandwidth to incompatible one - disconnect\n", link->u.mgd.bssid); return ret; } cfg80211_schedule_channels_check(&sdata->wdev); return 0; } /* frame sending functions */ static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, u8 ap_ht_param, struct ieee80211_supported_band *sband, struct ieee80211_channel *channel, enum ieee80211_smps_mode smps, ieee80211_conn_flags_t conn_flags) { u8 *pos; u32 flags = channel->flags; u16 cap; struct ieee80211_sta_ht_cap ht_cap; BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); ieee80211_apply_htcap_overrides(sdata, &ht_cap); /* determine capability flags */ cap = ht_cap.cap; switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: if (flags & IEEE80211_CHAN_NO_HT40PLUS) { cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; cap &= ~IEEE80211_HT_CAP_SGI_40; } break; case IEEE80211_HT_PARAM_CHA_SEC_BELOW: if (flags & IEEE80211_CHAN_NO_HT40MINUS) { cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; cap &= ~IEEE80211_HT_CAP_SGI_40; } break; } /* * If 40 MHz was disabled associate as though we weren't * capable of 40 MHz -- some broken APs will never fall * back to trying to transmit in 20 MHz. */ if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) { cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; cap &= ~IEEE80211_HT_CAP_SGI_40; } /* set SM PS mode properly */ cap &= ~IEEE80211_HT_CAP_SM_PS; switch (smps) { case IEEE80211_SMPS_AUTOMATIC: case IEEE80211_SMPS_NUM_MODES: WARN_ON(1); fallthrough; case IEEE80211_SMPS_OFF: cap |= WLAN_HT_CAP_SM_PS_DISABLED << IEEE80211_HT_CAP_SM_PS_SHIFT; break; case IEEE80211_SMPS_STATIC: cap |= WLAN_HT_CAP_SM_PS_STATIC << IEEE80211_HT_CAP_SM_PS_SHIFT; break; case IEEE80211_SMPS_DYNAMIC: cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << IEEE80211_HT_CAP_SM_PS_SHIFT; break; } /* reserve and fill IE */ pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); } /* This function determines vht capability flags for the association * and builds the IE. * Note - the function returns true to own the MU-MIMO capability */ static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, struct ieee80211_supported_band *sband, struct ieee80211_vht_cap *ap_vht_cap, ieee80211_conn_flags_t conn_flags) { struct ieee80211_local *local = sdata->local; u8 *pos; u32 cap; struct ieee80211_sta_vht_cap vht_cap; u32 mask, ap_bf_sts, our_bf_sts; bool mu_mimo_owner = false; BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); /* determine capability flags */ cap = vht_cap.cap; if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) { u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; } if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) { cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; } /* * Some APs apparently get confused if our capabilities are better * than theirs, so restrict what we advertise in the assoc request. */ if (!(ap_vht_cap->vht_cap_info & cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); else if (!(ap_vht_cap->vht_cap_info & cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; /* * If some other vif is using the MU-MIMO capability we cannot associate * using MU-MIMO - this will lead to contradictions in the group-id * mechanism. * Ownership is defined since association request, in order to avoid * simultaneous associations with MU-MIMO. */ if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { bool disable_mu_mimo = false; struct ieee80211_sub_if_data *other; list_for_each_entry_rcu(other, &local->interfaces, list) { if (other->vif.bss_conf.mu_mimo_owner) { disable_mu_mimo = true; break; } } if (disable_mu_mimo) cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; else mu_mimo_owner = true; } mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; our_bf_sts = cap & mask; if (ap_bf_sts < our_bf_sts) { cap &= ~mask; cap |= ap_bf_sts; } /* reserve and fill IE */ pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); return mu_mimo_owner; } /* This function determines HE capability flags for the association * and builds the IE. */ static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, struct ieee80211_supported_band *sband, enum ieee80211_smps_mode smps_mode, ieee80211_conn_flags_t conn_flags) { u8 *pos, *pre_he_pos; const struct ieee80211_sta_he_cap *he_cap; u8 he_cap_size; he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); if (WARN_ON(!he_cap)) return; /* get a max size estimate */ he_cap_size = 2 + 1 + sizeof(he_cap->he_cap_elem) + ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + ieee80211_he_ppe_size(he_cap->ppe_thres[0], he_cap->he_cap_elem.phy_cap_info); pos = skb_put(skb, he_cap_size); pre_he_pos = pos; pos = ieee80211_ie_build_he_cap(conn_flags, pos, he_cap, pos + he_cap_size); /* trim excess if any */ skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos)); ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb); } static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, struct ieee80211_supported_band *sband) { u8 *pos; const struct ieee80211_sta_he_cap *he_cap; const struct ieee80211_sta_eht_cap *eht_cap; u8 eht_cap_size; he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); /* * EHT capabilities element is only added if the HE capabilities element * was added so assume that 'he_cap' is valid and don't check it. */ if (WARN_ON(!he_cap || !eht_cap)) return; eht_cap_size = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, &eht_cap->eht_cap_elem, false) + ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], eht_cap->eht_cap_elem.phy_cap_info); pos = skb_put(skb, eht_cap_size); ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size, false); } static void ieee80211_assoc_add_rates(struct sk_buff *skb, enum nl80211_chan_width width, struct ieee80211_supported_band *sband, struct ieee80211_mgd_assoc_data *assoc_data) { unsigned int rates_len, supp_rates_len; u32 rates = 0; int i, count; u8 *pos; if (assoc_data->supp_rates_len) { /* * Get all rates supported by the device and the AP as * some APs don't like getting a superset of their rates * in the association request (e.g. D-Link DAP 1353 in * b-only mode)... */ rates_len = ieee80211_parse_bitrates(width, sband, assoc_data->supp_rates, assoc_data->supp_rates_len, &rates); } else { /* * In case AP not provide any supported rates information * before association, we send information element(s) with * all rates that we support. */ rates_len = sband->n_bitrates; for (i = 0; i < sband->n_bitrates; i++) rates |= BIT(i); } supp_rates_len = rates_len; if (supp_rates_len > 8) supp_rates_len = 8; pos = skb_put(skb, supp_rates_len + 2); *pos++ = WLAN_EID_SUPP_RATES; *pos++ = supp_rates_len; count = 0; for (i = 0; i < sband->n_bitrates; i++) { if (BIT(i) & rates) { int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5); *pos++ = (u8)rate; if (++count == 8) break; } } if (rates_len > count) { pos = skb_put(skb, rates_len - count + 2); *pos++ = WLAN_EID_EXT_SUPP_RATES; *pos++ = rates_len - count; for (i++; i < sband->n_bitrates; i++) { if (BIT(i) & rates) { int rate; rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5); *pos++ = (u8)rate; } } } } static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, const u8 *elems, size_t elems_len, size_t offset) { size_t noffset; static const u8 before_ht[] = { WLAN_EID_SSID, WLAN_EID_SUPP_RATES, WLAN_EID_EXT_SUPP_RATES, WLAN_EID_PWR_CAPABILITY, WLAN_EID_SUPPORTED_CHANNELS, WLAN_EID_RSN, WLAN_EID_QOS_CAPA, WLAN_EID_RRM_ENABLED_CAPABILITIES, WLAN_EID_MOBILITY_DOMAIN, WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ WLAN_EID_RIC_DATA, /* reassoc only */ WLAN_EID_SUPPORTED_REGULATORY_CLASSES, }; static const u8 after_ric[] = { WLAN_EID_SUPPORTED_REGULATORY_CLASSES, WLAN_EID_HT_CAPABILITY, WLAN_EID_BSS_COEX_2040, /* luckily this is almost always there */ WLAN_EID_EXT_CAPABILITY, WLAN_EID_QOS_TRAFFIC_CAPA, WLAN_EID_TIM_BCAST_REQ, WLAN_EID_INTERWORKING, /* 60 GHz (Multi-band, DMG, MMS) can't happen */ WLAN_EID_VHT_CAPABILITY, WLAN_EID_OPMODE_NOTIF, }; if (!elems_len) return offset; noffset = ieee80211_ie_split_ric(elems, elems_len, before_ht, ARRAY_SIZE(before_ht), after_ric, ARRAY_SIZE(after_ric), offset); skb_put_data(skb, elems + offset, noffset - offset); return noffset; } static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, const u8 *elems, size_t elems_len, size_t offset) { static const u8 before_vht[] = { /* * no need to list the ones split off before HT * or generated here */ WLAN_EID_BSS_COEX_2040, WLAN_EID_EXT_CAPABILITY, WLAN_EID_QOS_TRAFFIC_CAPA, WLAN_EID_TIM_BCAST_REQ, WLAN_EID_INTERWORKING, /* 60 GHz (Multi-band, DMG, MMS) can't happen */ }; size_t noffset; if (!elems_len) return offset; /* RIC already taken care of in ieee80211_add_before_ht_elems() */ noffset = ieee80211_ie_split(elems, elems_len, before_vht, ARRAY_SIZE(before_vht), offset); skb_put_data(skb, elems + offset, noffset - offset); return noffset; } static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, const u8 *elems, size_t elems_len, size_t offset) { static const u8 before_he[] = { /* * no need to list the ones split off before VHT * or generated here */ WLAN_EID_OPMODE_NOTIF, WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, /* 11ai elements */ WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, /* TODO: add 11ah/11aj/11ak elements */ }; size_t noffset; if (!elems_len) return offset; /* RIC already taken care of in ieee80211_add_before_ht_elems() */ noffset = ieee80211_ie_split(elems, elems_len, before_he, ARRAY_SIZE(before_he), offset); skb_put_data(skb, elems + offset, noffset - offset); return noffset; } #define PRESENT_ELEMS_MAX 8 #define PRESENT_ELEM_EXT_OFFS 0x100 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, u16 capab, const struct element *ext_capa, const u16 *present_elems); static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, u16 *capab, const struct element *ext_capa, const u8 *extra_elems, size_t extra_elems_len, unsigned int link_id, struct ieee80211_link_data *link, u16 *present_elems) { enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; struct ieee80211_channel *chan = cbss->channel; const struct ieee80211_sband_iftype_data *iftd; struct ieee80211_local *local = sdata->local; struct ieee80211_supported_band *sband; enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; struct ieee80211_chanctx_conf *chanctx_conf; enum ieee80211_smps_mode smps_mode; u16 orig_capab = *capab; size_t offset = 0; int present_elems_len = 0; u8 *pos; int i; #define ADD_PRESENT_ELEM(id) do { \ /* need a last for termination - we use 0 == SSID */ \ if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ present_elems[present_elems_len++] = (id); \ } while (0) #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) if (link) smps_mode = link->smps_mode; else if (sdata->u.mgd.powersave) smps_mode = IEEE80211_SMPS_DYNAMIC; else smps_mode = IEEE80211_SMPS_OFF; if (link) { /* * 5/10 MHz scenarios are only viable without MLO, in which * case this pointer should be used ... All of this is a bit * unclear though, not sure this even works at all. */ rcu_read_lock(); chanctx_conf = rcu_dereference(link->conf->chanctx_conf); if (chanctx_conf) width = chanctx_conf->def.width; rcu_read_unlock(); } sband = local->hw.wiphy->bands[chan->band]; iftd = ieee80211_get_sband_iftype_data(sband, iftype); if (sband->band == NL80211_BAND_2GHZ) { *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; } if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; if (sband->band != NL80211_BAND_S1GHZ) ieee80211_assoc_add_rates(skb, width, sband, assoc_data); if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || *capab & WLAN_CAPABILITY_RADIO_MEASURE) { struct cfg80211_chan_def chandef = { .width = width, .chan = chan, }; pos = skb_put(skb, 4); *pos++ = WLAN_EID_PWR_CAPABILITY; *pos++ = 2; *pos++ = 0; /* min tx power */ /* max tx power */ *pos++ = ieee80211_chandef_max_power(&chandef); ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); } /* * Per spec, we shouldn't include the list of channels if we advertise * support for extended channel switching, but we've always done that; * (for now?) apply this restriction only on the (new) 6 GHz band. */ if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && (sband->band != NL80211_BAND_6GHZ || !ext_capa || ext_capa->datalen < 1 || !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { /* TODO: get this in reg domain format */ pos = skb_put(skb, 2 * sband->n_channels + 2); *pos++ = WLAN_EID_SUPPORTED_CHANNELS; *pos++ = 2 * sband->n_channels; for (i = 0; i < sband->n_channels; i++) { int cf = sband->channels[i].center_freq; *pos++ = ieee80211_frequency_to_channel(cf); *pos++ = 1; /* one channel in the subband*/ } ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); } /* if present, add any custom IEs that go before HT */ offset = ieee80211_add_before_ht_elems(skb, extra_elems, extra_elems_len, offset); if (sband->band != NL80211_BAND_6GHZ && !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) { ieee80211_add_ht_ie(sdata, skb, assoc_data->link[link_id].ap_ht_param, sband, chan, smps_mode, assoc_data->link[link_id].conn_flags); ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); } /* if present, add any custom IEs that go before VHT */ offset = ieee80211_add_before_vht_elems(skb, extra_elems, extra_elems_len, offset); if (sband->band != NL80211_BAND_6GHZ && !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) { bool mu_mimo_owner = ieee80211_add_vht_ie(sdata, skb, sband, &assoc_data->link[link_id].ap_vht_cap, assoc_data->link[link_id].conn_flags); if (link) link->conf->mu_mimo_owner = mu_mimo_owner; ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); } /* * If AP doesn't support HT, mark HE and EHT as disabled. * If on the 5GHz band, make sure it supports VHT. */ if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT || (sband->band == NL80211_BAND_5GHZ && assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) assoc_data->link[link_id].conn_flags |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; /* if present, add any custom IEs that go before HE */ offset = ieee80211_add_before_he_elems(skb, extra_elems, extra_elems_len, offset); if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) { ieee80211_add_he_ie(sdata, skb, sband, smps_mode, assoc_data->link[link_id].conn_flags); ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); } /* * careful - need to know about all the present elems before * calling ieee80211_assoc_add_ml_elem(), so add this one if * we're going to put it after the ML element */ if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); if (link_id == assoc_data->assoc_link_id) ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, present_elems); /* crash if somebody gets it wrong */ present_elems = NULL; if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) ieee80211_add_eht_ie(sdata, skb, sband); if (sband->band == NL80211_BAND_S1GHZ) { ieee80211_add_aid_request_ie(sdata, skb); ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); } if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); if (link) link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags; return offset; } static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, const u16 *outer, const u16 *inner) { unsigned int skb_len = skb->len; bool at_extension = false; bool added = false; int i, j; u8 *len, *list_len = NULL; skb_put_u8(skb, WLAN_EID_EXTENSION); len = skb_put(skb, 1); skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { u16 elem = outer[i]; bool have_inner = false; /* should at least be sorted in the sense of normal -> ext */ WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); /* switch to extension list */ if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { at_extension = true; if (!list_len) skb_put_u8(skb, 0); list_len = NULL; } for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { if (elem == inner[j]) { have_inner = true; break; } } if (have_inner) continue; if (!list_len) { list_len = skb_put(skb, 1); *list_len = 0; } *list_len += 1; skb_put_u8(skb, (u8)elem); added = true; } /* if we added a list but no extension list, make a zero-len one */ if (added && (!at_extension || !list_len)) skb_put_u8(skb, 0); /* if nothing added remove extension element completely */ if (!added) skb_trim(skb, skb_len); else *len = skb->len - skb_len - 2; } static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, u16 capab, const struct element *ext_capa, const u16 *outer_present_elems) { struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; struct ieee80211_multi_link_elem *ml_elem; struct ieee80211_mle_basic_common_info *common; const struct wiphy_iftype_ext_capab *ift_ext_capa; __le16 eml_capa = 0, mld_capa_ops = 0; unsigned int link_id; u8 *ml_elem_len; void *capab_pos; if (!ieee80211_vif_is_mld(&sdata->vif)) return; ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, ieee80211_vif_type_p2p(&sdata->vif)); if (ift_ext_capa) { eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); } skb_put_u8(skb, WLAN_EID_EXTENSION); ml_elem_len = skb_put(skb, 1); skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); ml_elem = skb_put(skb, sizeof(*ml_elem)); ml_elem->control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); common = skb_put(skb, sizeof(*common)); common->len = sizeof(*common) + 2; /* MLD capa/ops */ memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | IEEE80211_EML_CAP_EMLMR_SUPPORT))) { common->len += 2; /* EML capabilities */ ml_elem->control |= cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); skb_put_data(skb, &eml_capa, sizeof(eml_capa)); } /* need indication from userspace to support this */ mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP); skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; const u8 *extra_elems; size_t extra_elems_len; size_t extra_used; u8 *subelem_len = NULL; __le16 ctrl; if (!assoc_data->link[link_id].bss || link_id == assoc_data->assoc_link_id) continue; extra_elems = assoc_data->link[link_id].elems; extra_elems_len = assoc_data->link[link_id].elems_len; skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); subelem_len = skb_put(skb, 1); ctrl = cpu_to_le16(link_id | IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); skb_put_data(skb, &ctrl, sizeof(ctrl)); skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ skb_put_data(skb, assoc_data->link[link_id].addr, ETH_ALEN); /* * Now add the contents of the (re)association request, * but the "listen interval" and "current AP address" * (if applicable) are skipped. So we only have * the capability field (remember the position and fill * later), followed by the elements added below by * calling ieee80211_assoc_link_elems(). */ capab_pos = skb_put(skb, 2); extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, ext_capa, extra_elems, extra_elems_len, link_id, NULL, link_present_elems); if (extra_elems) skb_put_data(skb, extra_elems + extra_used, extra_elems_len - extra_used); put_unaligned_le16(capab, capab_pos); ieee80211_add_non_inheritance_elem(skb, outer_present_elems, link_present_elems); ieee80211_fragment_element(skb, subelem_len, IEEE80211_MLE_SUBELEM_FRAGMENT); } ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); } static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) { struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; struct ieee80211_link_data *link; struct sk_buff *skb; struct ieee80211_mgmt *mgmt; u8 *pos, qos_info, *ie_start; size_t offset, noffset; u16 capab = 0, link_capab; __le16 listen_int; struct element *ext_capa = NULL; enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); struct ieee80211_prep_tx_info info = {}; unsigned int link_id, n_links = 0; u16 present_elems[PRESENT_ELEMS_MAX] = {}; void *capab_pos; size_t size; int ret; /* we know it's writable, cast away the const */ if (assoc_data->ie_len) ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, assoc_data->ie, assoc_data->ie_len); lockdep_assert_wiphy(sdata->local->hw.wiphy); size = local->hw.extra_tx_headroom + sizeof(*mgmt) + /* bit too much but doesn't matter */ 2 + assoc_data->ssid_len + /* SSID */ assoc_data->ie_len + /* extra IEs */ (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 9; /* WMM */ for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; const struct ieee80211_sband_iftype_data *iftd; struct ieee80211_supported_band *sband; if (!cbss) continue; sband = local->hw.wiphy->bands[cbss->channel->band]; n_links++; /* add STA profile elements length */ size += assoc_data->link[link_id].elems_len; /* and supported rates length */ size += 4 + sband->n_bitrates; /* supported channels */ size += 2 + 2 * sband->n_channels; iftd = ieee80211_get_sband_iftype_data(sband, iftype); if (iftd) size += iftd->vendor_elems.len; /* power capability */ size += 4; /* HT, VHT, HE, EHT */ size += 2 + sizeof(struct ieee80211_ht_cap); size += 2 + sizeof(struct ieee80211_vht_cap); size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + sizeof(struct ieee80211_he_mcs_nss_supp) + IEEE80211_HE_PPE_THRES_MAX_LEN; if (sband->band == NL80211_BAND_6GHZ) size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + sizeof(struct ieee80211_eht_mcs_nss_supp) + IEEE80211_EHT_PPE_THRES_MAX_LEN; /* non-inheritance element */ size += 2 + 2 + PRESENT_ELEMS_MAX; /* should be the same across all BSSes */ if (cbss->capability & WLAN_CAPABILITY_PRIVACY) capab |= WLAN_CAPABILITY_PRIVACY; } if (ieee80211_vif_is_mld(&sdata->vif)) { /* consider the multi-link element with STA profile */ size += sizeof(struct ieee80211_multi_link_elem); /* max common info field in basic multi-link element */ size += sizeof(struct ieee80211_mle_basic_common_info) + 2 + /* capa & op */ 2; /* EML capa */ /* * The capability elements were already considered above; * note this over-estimates a bit because there's no * STA profile for the assoc link. */ size += (n_links - 1) * (1 + 1 + /* subelement ID/length */ 2 + /* STA control */ 1 + ETH_ALEN + 2 /* STA Info field */); } link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); if (WARN_ON(!link)) return -EINVAL; if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) return -EINVAL; skb = alloc_skb(size, GFP_KERNEL); if (!skb) return -ENOMEM; skb_reserve(skb, local->hw.extra_tx_headroom); if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) capab |= WLAN_CAPABILITY_RADIO_MEASURE; /* Set MBSSID support for HE AP if needed */ if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && ext_capa && ext_capa->datalen >= 3) ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; mgmt = skb_put_zero(skb, 24); memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); listen_int = cpu_to_le16(assoc_data->s1g ? ieee80211_encode_usf(local->hw.conf.listen_interval) : local->hw.conf.listen_interval); if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { skb_put(skb, 10); mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_REQ); capab_pos = &mgmt->u.reassoc_req.capab_info; mgmt->u.reassoc_req.listen_interval = listen_int; memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_ap_addr, ETH_ALEN); info.subtype = IEEE80211_STYPE_REASSOC_REQ; } else { skb_put(skb, 4); mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_REQ); capab_pos = &mgmt->u.assoc_req.capab_info; mgmt->u.assoc_req.listen_interval = listen_int; info.subtype = IEEE80211_STYPE_ASSOC_REQ; } /* SSID */ pos = skb_put(skb, 2 + assoc_data->ssid_len); ie_start = pos; *pos++ = WLAN_EID_SSID; *pos++ = assoc_data->ssid_len; memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); /* * This bit is technically reserved, so it shouldn't matter for either * the AP or us, but it also means we shouldn't set it. However, we've * always set it in the past, and apparently some EHT APs check that * we don't set it. To avoid interoperability issues with old APs that * for some reason check it and want it to be set, set the bit for all * pre-EHT connections as we used to do. */ if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT) capab |= WLAN_CAPABILITY_ESS; /* add the elements for the assoc (main) link */ link_capab = capab; offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, ext_capa, assoc_data->ie, assoc_data->ie_len, assoc_data->assoc_link_id, link, present_elems); put_unaligned_le16(link_capab, capab_pos); /* if present, add any custom non-vendor IEs */ if (assoc_data->ie_len) { noffset = ieee80211_ie_split_vendor(assoc_data->ie, assoc_data->ie_len, offset); skb_put_data(skb, assoc_data->ie + offset, noffset - offset); offset = noffset; } if (assoc_data->wmm) { if (assoc_data->uapsd) { qos_info = ifmgd->uapsd_queues; qos_info |= (ifmgd->uapsd_max_sp_len << IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); } else { qos_info = 0; } pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); } /* add any remaining custom (i.e. vendor specific here) IEs */ if (assoc_data->ie_len) { noffset = assoc_data->ie_len; skb_put_data(skb, assoc_data->ie + offset, noffset - offset); } if (assoc_data->fils_kek_len) { ret = fils_encrypt_assoc_req(skb, assoc_data); if (ret < 0) { dev_kfree_skb(skb); return ret; } } pos = skb_tail_pointer(skb); kfree(ifmgd->assoc_req_ies); ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); if (!ifmgd->assoc_req_ies) { dev_kfree_skb(skb); return -ENOMEM; } ifmgd->assoc_req_ies_len = pos - ie_start; info.link_id = assoc_data->assoc_link_id; drv_mgd_prepare_tx(local, sdata, &info); IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | IEEE80211_TX_INTFL_MLME_CONN_TX; ieee80211_tx_skb(sdata, skb); return 0; } void ieee80211_send_pspoll(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata) { struct ieee80211_pspoll *pspoll; struct sk_buff *skb; skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); if (!skb) return; pspoll = (struct ieee80211_pspoll *) skb->data; pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; ieee80211_tx_skb(sdata, skb); } void ieee80211_send_nullfunc(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata, bool powersave) { struct sk_buff *skb; struct ieee80211_hdr_3addr *nullfunc; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); if (!skb) return; nullfunc = (struct ieee80211_hdr_3addr *) skb->data; if (powersave) nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | IEEE80211_TX_INTFL_OFFCHAN_TX_OK; if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; ieee80211_tx_skb(sdata, skb); } void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata) { struct sk_buff *skb; struct ieee80211_hdr *nullfunc; __le16 fc; if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) return; skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); if (!skb) return; skb_reserve(skb, local->hw.extra_tx_headroom); nullfunc = skb_put_zero(skb, 30); fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); nullfunc->frame_control = fc; memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; ieee80211_tx_skb(sdata, skb); } /* spectrum management related things */ static void ieee80211_chswitch_work(struct wiphy *wiphy, struct wiphy_work *work) { struct ieee80211_link_data *link = container_of(work, struct ieee80211_link_data, u.mgd.chswitch_work.work); struct ieee80211_sub_if_data *sdata = link->sdata; struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; int ret; if (!ieee80211_sdata_running(sdata)) return; lockdep_assert_wiphy(local->hw.wiphy); if (!ifmgd->associated) return; if (!link->conf->csa_active) return; /* * using reservation isn't immediate as it may be deferred until later * with multi-vif. once reservation is complete it will re-schedule the * work with no reserved_chanctx so verify chandef to check if it * completed successfully */ if (link->reserved_chanctx) { /* * with multi-vif csa driver may call ieee80211_csa_finish() * many times while waiting for other interfaces to use their * reservations */ if (link->reserved_ready) return; ret = ieee80211_link_use_reserved_context(link); if (ret) { sdata_info(sdata, "failed to use reserved channel context, disconnecting (err=%d)\n", ret); wiphy_work_queue(sdata->local->hw.wiphy, &ifmgd->csa_connection_drop_work); } return; } if (!cfg80211_chandef_identical(&link->conf->chandef, &link->csa_chandef)) { sdata_info(sdata, "failed to finalize channel switch, disconnecting\n"); wiphy_work_queue(sdata->local->hw.wiphy, &ifmgd->csa_connection_drop_work); return; } link->u.mgd.csa_waiting_bcn = true; ieee80211_sta_reset_beacon_monitor(sdata); ieee80211_sta_reset_conn_monitor(sdata); } static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) { struct ieee80211_sub_if_data *sdata = link->sdata; struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; int ret; lockdep_assert_wiphy(sdata->local->hw.wiphy); WARN_ON(!link->conf->csa_active); if (link->csa_block_tx) { ieee80211_wake_vif_queues(local, sdata, IEEE80211_QUEUE_STOP_REASON_CSA); link->csa_block_tx = false; } link->conf->csa_active = false; link->u.mgd.csa_waiting_bcn = false; /* * If the CSA IE is still present on the beacon after the switch, * we need to consider it as a new CSA (possibly to self). */ link->u.mgd.beacon_crc_valid = false; ret = drv_post_channel_switch(link); if (ret) { sdata_info(sdata, "driver post channel switch failed, disconnecting\n"); wiphy_work_queue(sdata->local->hw.wiphy, &ifmgd->csa_connection_drop_work); return; } cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, link->link_id, 0); } void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, unsigned int link_id) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); trace_api_chswitch_done(sdata, success, link_id); rcu_read_lock(); if (!success) { sdata_info(sdata, "driver channel switch failed, disconnecting\n"); wiphy_work_queue(sdata->local->hw.wiphy, &sdata->u.mgd.csa_connection_drop_work); } else { struct ieee80211_link_data *link = rcu_dereference(sdata->link[link_id]); if (WARN_ON(!link)) { rcu_read_unlock(); return; } wiphy_delayed_work_queue(sdata->local->hw.wiphy, &link->u.mgd.chswitch_work, 0); } rcu_read_unlock(); } EXPORT_SYMBOL(ieee80211_chswitch_done); static void ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) { struct ieee80211_sub_if_data *sdata = link->sdata; struct ieee80211_local *local = sdata->local; lockdep_assert_wiphy(local->hw.wiphy); if (!local->ops->abort_channel_switch) return; ieee80211_link_unreserve_chanctx(link); if (link->csa_block_tx) ieee80211_wake_vif_queues(local, sdata, IEEE80211_QUEUE_STOP_REASON_CSA); link->csa_block_tx = false; link->conf->csa_active = false; drv_abort_channel_switch(sdata); } static void ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, u64 timestamp, u32 device_timestamp, struct ieee802_11_elems *elems, bool beacon) { struct ieee80211_sub_if_data *sdata = link->sdata; struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct cfg80211_bss *cbss = link->u.mgd.bss; struct ieee80211_chanctx_conf *conf; struct ieee80211_chanctx *chanctx; enum nl80211_band current_band; struct ieee80211_csa_ie csa_ie; struct ieee80211_channel_switch ch_switch; struct ieee80211_bss *bss; unsigned long timeout; int res; lockdep_assert_wiphy(local->hw.wiphy); if (!cbss) return; current_band = cbss->channel->band; bss = (void *)cbss->priv; res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, bss->vht_cap_info, link->u.mgd.conn_flags, link->u.mgd.bssid, &csa_ie); if (!res) { ch_switch.timestamp = timestamp; ch_switch.device_timestamp = device_timestamp; ch_switch.block_tx = csa_ie.mode; ch_switch.chandef = csa_ie.chandef; ch_switch.count = csa_ie.count; ch_switch.delay = csa_ie.max_switch_time; } if (res < 0) goto drop_connection; if (beacon && link->conf->csa_active && !link->u.mgd.csa_waiting_bcn) { if (res) ieee80211_sta_abort_chanswitch(link); else drv_channel_switch_rx_beacon(sdata, &ch_switch); return; } else if (link->conf->csa_active || res) { /* disregard subsequent announcements if already processing */ return; } if (link->conf->chandef.chan->band != csa_ie.chandef.chan->band) { sdata_info(sdata, "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", link->u.mgd.bssid, csa_ie.chandef.chan->center_freq, csa_ie.chandef.width, csa_ie.chandef.center_freq1, csa_ie.chandef.center_freq2); goto drop_connection; } if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, IEEE80211_CHAN_DISABLED)) { sdata_info(sdata, "AP %pM switches to unsupported channel " "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " "disconnecting\n", link->u.mgd.bssid, csa_ie.chandef.chan->center_freq, csa_ie.chandef.chan->freq_offset, csa_ie.chandef.width, csa_ie.chandef.center_freq1, csa_ie.chandef.freq1_offset, csa_ie.chandef.center_freq2); goto drop_connection; } if (cfg80211_chandef_identical(&csa_ie.chandef, &link->conf->chandef) && (!csa_ie.mode || !beacon)) { if (link->u.mgd.csa_ignored_same_chan) return; sdata_info(sdata, "AP %pM tries to chanswitch to same channel, ignore\n", link->u.mgd.bssid); link->u.mgd.csa_ignored_same_chan = true; return; } /* * Drop all TDLS peers - either we disconnect or move to a different * channel from this point on. There's no telling what our peer will do. * The TDLS WIDER_BW scenario is also problematic, as peers might now * have an incompatible wider chandef. */ ieee80211_teardown_tdls_peers(sdata); conf = rcu_dereference_protected(link->conf->chanctx_conf, lockdep_is_held(&local->hw.wiphy->mtx)); if (!conf) { sdata_info(sdata, "no channel context assigned to vif?, disconnecting\n"); goto drop_connection; } chanctx = container_of(conf, struct ieee80211_chanctx, conf); if (local->use_chanctx && !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { sdata_info(sdata, "driver doesn't support chan-switch with channel contexts\n"); goto drop_connection; } if (drv_pre_channel_switch(sdata, &ch_switch)) { sdata_info(sdata, "preparing for channel switch failed, disconnecting\n"); goto drop_connection; } res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef, chanctx->mode, false); if (res) { sdata_info(sdata, "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", res); goto drop_connection; } link->conf->csa_active = true; link->csa_chandef = csa_ie.chandef; link->csa_block_tx = csa_ie.mode; link->u.mgd.csa_ignored_same_chan = false; link->u.mgd.beacon_crc_valid = false; if (link->csa_block_tx) ieee80211_stop_vif_queues(local, sdata, IEEE80211_QUEUE_STOP_REASON_CSA); cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, link->link_id, csa_ie.count, csa_ie.mode, 0); if (local->ops->channel_switch) { /* use driver's channel switch callback */ drv_channel_switch(local, sdata, &ch_switch); return; } /* channel switch handled in software */ timeout = TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * cbss->beacon_interval); wiphy_delayed_work_queue(local->hw.wiphy, &link->u.mgd.chswitch_work, timeout); return; drop_connection: /* * This is just so that the disconnect flow will know that * we were trying to switch channel and failed. In case the * mode is 1 (we are not allowed to Tx), we will know not to * send a deauthentication frame. Those two fields will be * reset when the disconnection worker runs. */ link->conf->csa_active = true; link->csa_block_tx = csa_ie.mode; wiphy_work_queue(sdata->local->hw.wiphy, &ifmgd->csa_connection_drop_work); } static bool ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, struct ieee80211_channel *channel, const u8 *country_ie, u8 country_ie_len, const u8 *pwr_constr_elem, int *chan_pwr, int *pwr_reduction) { struct ieee80211_country_ie_triplet *triplet; int chan = ieee80211_frequency_to_channel(channel->center_freq); int i, chan_increment; bool have_chan_pwr = false; /* Invalid IE */ if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) return false; triplet = (void *)(country_ie + 3); country_ie_len -= 3; switch (channel->band) { default: WARN_ON_ONCE(1); fallthrough; case NL80211_BAND_2GHZ: case NL80211_BAND_60GHZ: case NL80211_BAND_LC: chan_increment = 1; break; case NL80211_BAND_5GHZ: chan_increment = 4; break; case NL80211_BAND_6GHZ: /* * In the 6 GHz band, the "maximum transmit power level" * field in the triplets is reserved, and thus will be * zero and we shouldn't use it to control TX power. * The actual TX power will be given in the transmit * power envelope element instead. */ return false; } /* find channel */ while (country_ie_len >= 3) { u8 first_channel = triplet->chans.first_channel; if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) goto next; for (i = 0; i < triplet->chans.num_channels; i++) { if (first_channel + i * chan_increment == chan) { have_chan_pwr = true; *chan_pwr = triplet->chans.max_power; break; } } if (have_chan_pwr) break; next: triplet++; country_ie_len -= 3; } if (have_chan_pwr && pwr_constr_elem) *pwr_reduction = *pwr_constr_elem; else *pwr_reduction = 0; return have_chan_pwr; } static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, struct ieee80211_channel *channel, const u8 *cisco_dtpc_ie, int *pwr_level) { /* From practical testing, the first data byte of the DTPC element * seems to contain the requested dBm level, and the CLI on Cisco * APs clearly state the range is -127 to 127 dBm, which indicates * a signed byte, although it seemingly never actually goes negative. * The other byte seems to always be zero. */ *pwr_level = (__s8)cisco_dtpc_ie[4]; } static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, struct ieee80211_channel *channel, struct ieee80211_mgmt *mgmt, const u8 *country_ie, u8 country_ie_len, const u8 *pwr_constr_ie, const u8 *cisco_dtpc_ie) { struct ieee80211_sub_if_data *sdata = link->sdata; bool has_80211h_pwr = false, has_cisco_pwr = false; int chan_pwr = 0, pwr_reduction_80211h = 0; int pwr_level_cisco, pwr_level_80211h; int new_ap_level; __le16 capab = mgmt->u.probe_resp.capab_info; if (ieee80211_is_s1g_beacon(mgmt->frame_control)) return 0; /* TODO */ if (country_ie && (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { has_80211h_pwr = ieee80211_find_80211h_pwr_constr( sdata, channel, country_ie, country_ie_len, pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); pwr_level_80211h = max_t(int, 0, chan_pwr - pwr_reduction_80211h); } if (cisco_dtpc_ie) { ieee80211_find_cisco_dtpc( sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); has_cisco_pwr = true; } if (!has_80211h_pwr && !has_cisco_pwr) return 0; /* If we have both 802.11h and Cisco DTPC, apply both limits * by picking the smallest of the two power levels advertised. */ if (has_80211h_pwr && (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { new_ap_level = pwr_level_80211h; if (link->ap_power_level == new_ap_level) return 0; sdata_dbg(sdata, "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", pwr_level_80211h, chan_pwr, pwr_reduction_80211h, link->u.mgd.bssid); } else { /* has_cisco_pwr is always true here. */ new_ap_level = pwr_level_cisco; if (link->ap_power_level == new_ap_level) return 0; sdata_dbg(sdata, "Limiting TX power to %d dBm as advertised by %pM\n", pwr_level_cisco, link->u.mgd.bssid); } link->ap_power_level = new_ap_level; if (__ieee80211_recalc_txpower(sdata)) return BSS_CHANGED_TXPOWER; return 0; } /* powersave */ static void ieee80211_enable_ps(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata) { struct ieee80211_conf *conf = &local->hw.conf; /* * If we are scanning right now then the parameters will * take effect when scan finishes. */ if (local->scanning) return; if (conf->dynamic_ps_timeout > 0 && !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { mod_timer(&local->dynamic_ps_timer, jiffies + msecs_to_jiffies(conf->dynamic_ps_timeout)); } else { if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ieee80211_send_nullfunc(local, sdata, true); if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) return; conf->flags |= IEEE80211_CONF_PS; ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); } } static void ieee80211_change_ps(struct ieee80211_local *local) { struct ieee80211_conf *conf = &local->hw.conf; if (local->ps_sdata) { ieee80211_enable_ps(local, local->ps_sdata); } else if (conf->flags & IEEE80211_CONF_PS) { conf->flags &= ~IEEE80211_CONF_PS; ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); del_timer_sync(&local->dynamic_ps_timer); wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); } } static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) { struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *mgd = &sdata->u.mgd; struct sta_info *sta = NULL; bool authorized = false; if (!mgd->powersave) return false; if (mgd->broken_ap) return false; if (!mgd->associated) return false; if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) return false; if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && !sdata->deflink.u.mgd.have_beacon) return false; rcu_read_lock(); sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); if (sta) authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); rcu_read_unlock(); return authorized; } /* need to hold RTNL or interface lock */ void ieee80211_recalc_ps(struct ieee80211_local *local) { struct ieee80211_sub_if_data *sdata, *found = NULL; int count = 0; int timeout; if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { local->ps_sdata = NULL; return; } list_for_each_entry(sdata, &local->interfaces, list) { if (!ieee80211_sdata_running(sdata)) continue; if (sdata->vif.type == NL80211_IFTYPE_AP) { /* If an AP vif is found, then disable PS * by setting the count to zero thereby setting * ps_sdata to NULL. */ count = 0; break; } if (sdata->vif.type != NL80211_IFTYPE_STATION) continue; found = sdata; count++; } if (count == 1 && ieee80211_powersave_allowed(found)) { u8 dtimper = found->deflink.u.mgd.dtim_period; timeout = local->dynamic_ps_forced_timeout; if (timeout < 0) timeout = 100; local->hw.conf.dynamic_ps_timeout = timeout; /* If the TIM IE is invalid, pretend the value is 1 */ if (!dtimper) dtimper = 1; local->hw.conf.ps_dtim_period = dtimper; local->ps_sdata = found; } else { local->ps_sdata = NULL; } ieee80211_change_ps(local); } void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) { bool ps_allowed = ieee80211_powersave_allowed(sdata); if (sdata->vif.cfg.ps != ps_allowed) { sdata->vif.cfg.ps = ps_allowed; ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); } } void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, struct wiphy_work *work) { struct ieee80211_local *local = container_of(work, struct ieee80211_local, dynamic_ps_disable_work); if (local->hw.conf.flags & IEEE80211_CONF_PS) { local->hw.conf.flags &= ~IEEE80211_CONF_PS; ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); } ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_PS, false); } void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, struct wiphy_work *work) { struct ieee80211_local *local = container_of(work, struct ieee80211_local, dynamic_ps_enable_work); struct ieee80211_sub_if_data *sdata = local->ps_sdata; struct ieee80211_if_managed *ifmgd; unsigned long flags; int q; /* can only happen when PS was just disabled anyway */ if (!sdata) return; ifmgd = &sdata->u.mgd; if (local->hw.conf.flags & IEEE80211_CONF_PS) return; if (local->hw.conf.dynamic_ps_timeout > 0) { /* don't enter PS if TX frames are pending */ if (drv_tx_frames_pending(local)) { mod_timer(&local->dynamic_ps_timer, jiffies + msecs_to_jiffies( local->hw.conf.dynamic_ps_timeout)); return; } /* * transmission can be stopped by others which leads to * dynamic_ps_timer expiry. Postpone the ps timer if it * is not the actual idle state. */ spin_lock_irqsave(&local->queue_stop_reason_lock, flags); for (q = 0; q < local->hw.queues; q++) { if (local->queue_stop_reasons[q]) { spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); mod_timer(&local->dynamic_ps_timer, jiffies + msecs_to_jiffies( local->hw.conf.dynamic_ps_timeout)); return; } } spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); } if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { if (drv_tx_frames_pending(local)) { mod_timer(&local->dynamic_ps_timer, jiffies + msecs_to_jiffies( local->hw.conf.dynamic_ps_timeout)); } else { ieee80211_send_nullfunc(local, sdata, true); /* Flush to get the tx status of nullfunc frame */ ieee80211_flush_queues(local, sdata, false); } } if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; local->hw.conf.flags |= IEEE80211_CONF_PS; ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); } } void ieee80211_dynamic_ps_timer(struct timer_list *t) { struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); } void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) { struct ieee80211_link_data *link = container_of(work, struct ieee80211_link_data, dfs_cac_timer_work.work); struct cfg80211_chan_def chandef = link->conf->chandef; struct ieee80211_sub_if_data *sdata = link->sdata; lockdep_assert_wiphy(sdata->local->hw.wiphy); if (sdata->wdev.cac_started) { ieee80211_link_release_channel(link); cfg80211_cac_event(sdata->dev, &chandef, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL); } } static bool __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) { struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; bool ret = false; int ac; if (local->hw.queues < IEEE80211_NUM_ACS) return false; for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; int non_acm_ac; unsigned long now = jiffies; if (tx_tspec->action == TX_TSPEC_ACTION_NONE && tx_tspec->admitted_time && time_after(now, tx_tspec->time_slice_start + HZ)) { tx_tspec->consumed_tx_time = 0; tx_tspec->time_slice_start = now; if (tx_tspec->downgraded) tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; } switch (tx_tspec->action) { case TX_TSPEC_ACTION_STOP_DOWNGRADE: /* take the original parameters */ if (drv_conf_tx(local, &sdata->deflink, ac, &sdata->deflink.tx_conf[ac])) link_err(&sdata->deflink, "failed to set TX queue parameters for queue %d\n", ac); tx_tspec->action = TX_TSPEC_ACTION_NONE; tx_tspec->downgraded = false; ret = true; break; case TX_TSPEC_ACTION_DOWNGRADE: if (time_after(now, tx_tspec->time_slice_start + HZ)) { tx_tspec->action = TX_TSPEC_ACTION_NONE; ret = true; break; } /* downgrade next lower non-ACM AC */ for (non_acm_ac = ac + 1; non_acm_ac < IEEE80211_NUM_ACS; non_acm_ac++) if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) break; /* Usually the loop will result in using BK even if it * requires admission control, but such a configuration * makes no sense and we have to transmit somehow - the * AC selection does the same thing. * If we started out trying to downgrade from BK, then * the extra condition here might be needed. */ if (non_acm_ac >= IEEE80211_NUM_ACS) non_acm_ac = IEEE80211_AC_BK; if (drv_conf_tx(local, &sdata->deflink, ac, &sdata->deflink.tx_conf[non_acm_ac])) link_err(&sdata->deflink, "failed to set TX queue parameters for queue %d\n", ac); tx_tspec->action = TX_TSPEC_ACTION_NONE; ret = true; wiphy_delayed_work_queue(local->hw.wiphy, &ifmgd->tx_tspec_wk, tx_tspec->time_slice_start + HZ - now + 1); break; case TX_TSPEC_ACTION_NONE: /* nothing now */ break; } } return ret; } void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) { if (__ieee80211_sta_handle_tspec_ac_params(sdata)) ieee80211_link_info_change_notify(sdata, &sdata->deflink, BSS_CHANGED_QOS); } static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, struct wiphy_work *work) { struct ieee80211_sub_if_data *sdata; sdata = container_of(work, struct ieee80211_sub_if_data, u.mgd.tx_tspec_wk.work); ieee80211_sta_handle_tspec_ac_params(sdata); } void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) { struct ieee80211_sub_if_data *sdata = link->sdata; struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_tx_queue_params *params = link->tx_conf; u8 ac; for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { mlme_dbg(sdata, "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", ac, params[ac].acm, params[ac].aifs, params[ac].cw_min, params[ac].cw_max, params[ac].txop, params[ac].uapsd, ifmgd->tx_tspec[ac].downgraded); if (!ifmgd->tx_tspec[ac].downgraded && drv_conf_tx(local, link, ac, ¶ms[ac])) link_err(link, "failed to set TX queue parameters for AC %d\n", ac); } } /* MLME */ static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, struct ieee80211_link_data *link, const u8 *wmm_param, size_t wmm_param_len, const struct ieee80211_mu_edca_param_set *mu_edca) { struct ieee80211_sub_if_data *sdata = link->sdata; struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; size_t left; int count, mu_edca_count, ac; const u8 *pos; u8 uapsd_queues = 0; if (!local->ops->conf_tx) return false; if (local->hw.queues < IEEE80211_NUM_ACS) return false; if (!wmm_param) return false; if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) return false; if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) uapsd_queues = ifmgd->uapsd_queues; count = wmm_param[6] & 0x0f; /* -1 is the initial value of ifmgd->mu_edca_last_param_set. * if mu_edca was preset before and now it disappeared tell * the driver about it. */ mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; if (count == link->u.mgd.wmm_last_param_set && mu_edca_count == link->u.mgd.mu_edca_last_param_set) return false; link->u.mgd.wmm_last_param_set = count; link->u.mgd.mu_edca_last_param_set = mu_edca_count; pos = wmm_param + 8; left = wmm_param_len - 8; memset(¶ms, 0, sizeof(params)); sdata->wmm_acm = 0; for (; left >= 4; left -= 4, pos += 4) { int aci = (pos[0] >> 5) & 0x03; int acm = (pos[0] >> 4) & 0x01; bool uapsd = false; switch (aci) { case 1: /* AC_BK */ ac = IEEE80211_AC_BK; if (acm) sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) uapsd = true; params[ac].mu_edca = !!mu_edca; if (mu_edca) params[ac].mu_edca_param_rec = mu_edca->ac_bk; break; case 2: /* AC_VI */ ac = IEEE80211_AC_VI; if (acm) sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) uapsd = true; params[ac].mu_edca = !!mu_edca; if (mu_edca) params[ac].mu_edca_param_rec = mu_edca->ac_vi; break; case 3: /* AC_VO */ ac = IEEE80211_AC_VO; if (acm) sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) uapsd = true; params[ac].mu_edca = !!mu_edca; if (mu_edca) params[ac].mu_edca_param_rec = mu_edca->ac_vo; break; case 0: /* AC_BE */ default: ac = IEEE80211_AC_BE; if (acm) sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) uapsd = true; params[ac].mu_edca = !!mu_edca; if (mu_edca) params[ac].mu_edca_param_rec = mu_edca->ac_be; break; } params[ac].aifs = pos[0] & 0x0f; if (params[ac].aifs < 2) { link_info(link, "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", params[ac].aifs, aci); params[ac].aifs = 2; } params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); params[ac].cw_min = ecw2cw(pos[1] & 0x0f); params[ac].txop = get_unaligned_le16(pos + 2); params[ac].acm = acm; params[ac].uapsd = uapsd; if (params[ac].cw_min == 0 || params[ac].cw_min > params[ac].cw_max) { link_info(link, "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", params[ac].cw_min, params[ac].cw_max, aci); return false; } ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); } /* WMM specification requires all 4 ACIs. */ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { if (params[ac].cw_min == 0) { link_info(link, "AP has invalid WMM params (missing AC %d), using defaults\n", ac); return false; } } for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) link->tx_conf[ac] = params[ac]; ieee80211_mgd_set_link_qos_params(link); /* enable WMM or activate new settings */ link->conf->qos = true; return true; } static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) { lockdep_assert_wiphy(sdata->local->hw.wiphy); sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; ieee80211_run_deferred_scan(sdata->local); } static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) { lockdep_assert_wiphy(sdata->local->hw.wiphy); __ieee80211_stop_poll(sdata); } static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, u16 capab, bool erp_valid, u8 erp) { struct ieee80211_bss_conf *bss_conf = link->conf; struct ieee80211_supported_band *sband; u64 changed = 0; bool use_protection; bool use_short_preamble; bool use_short_slot; sband = ieee80211_get_link_sband(link); if (!sband) return changed; if (erp_valid) { use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; } else { use_protection = false; use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); } use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); if (sband->band == NL80211_BAND_5GHZ || sband->band == NL80211_BAND_6GHZ) use_short_slot = true; if (use_protection != bss_conf->use_cts_prot) { bss_conf->use_cts_prot = use_protection; changed |= BSS_CHANGED_ERP_CTS_PROT; } if (use_short_preamble != bss_conf->use_short_preamble) { bss_conf->use_short_preamble = use_short_preamble; changed |= BSS_CHANGED_ERP_PREAMBLE; } if (use_short_slot != bss_conf->use_short_slot) { bss_conf->use_short_slot = use_short_slot; changed |= BSS_CHANGED_ERP_SLOT; } return changed; } static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, struct cfg80211_bss *cbss) { struct ieee80211_sub_if_data *sdata = link->sdata; struct ieee80211_bss_conf *bss_conf = link->conf; struct ieee80211_bss *bss = (void *)cbss->priv; u64 changed = BSS_CHANGED_QOS; /* not really used in MLO */ sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * bss_conf->beacon_int)); changed |= ieee80211_handle_bss_capability(link, bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); ieee80211_check_rate_mask(link); link->u.mgd.bss = cbss; memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); if (sdata->vif.p2p || sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { const struct cfg80211_bss_ies *ies; rcu_read_lock(); ies = rcu_dereference(cbss->ies); if (ies) { int ret; ret = cfg80211_get_p2p_attr( ies->data, ies->len, IEEE80211_P2P_ATTR_ABSENCE_NOTICE, (u8 *) &bss_conf->p2p_noa_attr, sizeof(bss_conf->p2p_noa_attr)); if (ret >= 2) { link->u.mgd.p2p_noa_index = bss_conf->p2p_noa_attr.index; changed |= BSS_CHANGED_P2P_PS; } } rcu_read_unlock(); } if (link->u.mgd.have_beacon) { bss_conf->beacon_rate = bss->beacon_rate; changed |= BSS_CHANGED_BEACON_INFO; } else { bss_conf->beacon_rate = NULL; } /* Tell the driver to monitor connection quality (if supported) */ if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && bss_conf->cqm_rssi_thold) changed |= BSS_CHANGED_CQM; return changed; } static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgd_assoc_data *assoc_data, u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) { struct ieee80211_local *local = sdata->local; struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; u64 vif_changed = BSS_CHANGED_ASSOC; unsigned int link_id; lockdep_assert_wiphy(local->hw.wiphy); sdata->u.mgd.associated = true; for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; struct ieee80211_link_data *link; if (!cbss || assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) continue; if (ieee80211_vif_is_mld(&sdata->vif) && !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) continue; link = sdata_dereference(sdata->link[link_id], sdata); if (WARN_ON(!link)) return; changed[link_id] |= ieee80211_link_set_associated(link, cbss); } /* just to be sure */ ieee80211_stop_poll(sdata); ieee80211_led_assoc(local, 1); vif_cfg->assoc = 1; /* Enable ARP filtering */ if (vif_cfg->arp_addr_cnt) vif_changed |= BSS_CHANGED_ARP_FILTER; if (ieee80211_vif_is_mld(&sdata->vif)) { for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { struct ieee80211_link_data *link; struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; if (!cbss || !(BIT(link_id) & ieee80211_vif_usable_links(&sdata->vif)) || assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) continue; link = sdata_dereference(sdata->link[link_id], sdata); if (WARN_ON(!link)) return; ieee80211_link_info_change_notify(sdata, link, changed[link_id]); ieee80211_recalc_smps(sdata, link); } ieee80211_vif_cfg_change_notify(sdata, vif_changed); } else { ieee80211_bss_info_change_notify(sdata, vif_changed | changed[0]); } ieee80211_recalc_ps(local); /* leave this here to not change ordering in non-MLO cases */ if (!ieee80211_vif_is_mld(&sdata->vif)) ieee80211_recalc_smps(sdata, &sdata->deflink); ieee80211_recalc_ps_vif(sdata); netif_carrier_on(sdata->dev); } static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, u16 stype, u16 reason, bool tx, u8 *frame_buf) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_local *local = sdata->local; unsigned int link_id; u64 changed = 0; struct ieee80211_prep_tx_info info = { .subtype = stype, }; lockdep_assert_wiphy(local->hw.wiphy); if (WARN_ON_ONCE(tx && !frame_buf)) return; if (WARN_ON(!ifmgd->associated)) return; ieee80211_stop_poll(sdata); ifmgd->associated = false; /* other links will be destroyed */ sdata->deflink.u.mgd.bss = NULL; sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; netif_carrier_off(sdata->dev); /* * if we want to get out of ps before disassoc (why?) we have * to do it before sending disassoc, as otherwise the null-packet * won't be valid. */ if (local->hw.conf.flags & IEEE80211_CONF_PS) { local->hw.conf.flags &= ~IEEE80211_CONF_PS; ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); } local->ps_sdata = NULL; /* disable per-vif ps */ ieee80211_recalc_ps_vif(sdata); /* make sure ongoing transmission finishes */ synchronize_net(); /* * drop any frame before deauth/disassoc, this can be data or * management frame. Since we are disconnecting, we should not * insist sending these frames which can take time and delay * the disconnection and possible the roaming. */ if (tx) ieee80211_flush_queues(local, sdata, true); /* deauthenticate/disassociate now */ if (tx || frame_buf) { /* * In multi channel scenarios guarantee that the virtual * interface is granted immediate airtime to transmit the * deauthentication frame by calling mgd_prepare_tx, if the * driver requested so. */ if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP)) { for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { struct ieee80211_link_data *link; link = sdata_dereference(sdata->link[link_id], sdata); if (!link) continue; if (link->u.mgd.have_beacon) break; } if (link_id == IEEE80211_MLD_MAX_NUM_LINKS) { info.link_id = ffs(sdata->vif.active_links) - 1; drv_mgd_prepare_tx(sdata->local, sdata, &info); } } ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, sdata->vif.cfg.ap_addr, stype, reason, tx, frame_buf); } /* flush out frame - make sure the deauth was actually sent */ if (tx) ieee80211_flush_queues(local, sdata, false); drv_mgd_complete_tx(sdata->local, sdata, &info); /* clear AP addr only after building the needed mgmt frames */ eth_zero_addr(sdata->deflink.u.mgd.bssid); eth_zero_addr(sdata->vif.cfg.ap_addr); sdata->vif.cfg.ssid_len = 0; /* remove AP and TDLS peers */ sta_info_flush(sdata); /* finally reset all BSS / config parameters */ if (!ieee80211_vif_is_mld(&sdata->vif)) changed |= ieee80211_reset_erp_info(sdata); ieee80211_led_assoc(local, 0); changed |= BSS_CHANGED_ASSOC; sdata->vif.cfg.assoc = false; sdata->deflink.u.mgd.p2p_noa_index = -1; memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, sizeof(sdata->vif.bss_conf.p2p_noa_attr)); /* on the next assoc, re-program HT/VHT parameters */ memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); /* * reset MU-MIMO ownership and group data in default link, * if used, other links are destroyed */ memset(sdata->vif.bss_conf.mu_group.membership, 0, sizeof(sdata->vif.bss_conf.mu_group.membership)); memset(sdata->vif.bss_conf.mu_group.position, 0, sizeof(sdata->vif.bss_conf.mu_group.position)); if (!ieee80211_vif_is_mld(&sdata->vif)) changed |= BSS_CHANGED_MU_GROUPS; sdata->vif.bss_conf.mu_mimo_owner = false; sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; del_timer_sync(&local->dynamic_ps_timer); wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); /* Disable ARP filtering */ if (sdata->vif.cfg.arp_addr_cnt) changed |= BSS_CHANGED_ARP_FILTER; sdata->vif.bss_conf.qos = false; if (!ieee80211_vif_is_mld(&sdata->vif)) { changed |= BSS_CHANGED_QOS; /* The BSSID (not really interesting) and HT changed */ changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; ieee80211_bss_info_change_notify(sdata, changed); } else { ieee80211_vif_cfg_change_notify(sdata, changed); } /* disassociated - set to defaults now */ ieee80211_set_wmm_default(&sdata->deflink, false, false); del_timer_sync(&sdata->u.mgd.conn_mon_timer); del_timer_sync(&sdata->u.mgd.bcn_mon_timer); del_timer_sync(&sdata->u.mgd.timer); sdata->vif.bss_conf.dtim_period = 0; sdata->vif.bss_conf.beacon_rate = NULL; sdata->deflink.u.mgd.have_beacon = false; sdata->deflink.u.mgd.tracking_signal_avg = false; sdata->deflink.u.mgd.disable_wmm_tracking = false; ifmgd->flags = 0; sdata->deflink.u.mgd.conn_flags = 0; for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { struct ieee80211_link_data *link; link = sdata_dereference(sdata->link[link_id], sdata); if (!link) continue; ieee80211_link_release_channel(link); } sdata->vif.bss_conf.csa_active = false; sdata->deflink.u.mgd.csa_waiting_bcn = false; sdata->deflink.u.mgd.csa_ignored_same_chan = false; if (sdata->deflink.csa_block_tx) { ieee80211_wake_vif_queues(local, sdata, IEEE80211_QUEUE_STOP_REASON_CSA); sdata->deflink.csa_block_tx = false; } /* existing TX TSPEC sessions no longer exist */ memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); sdata->vif.bss_conf.pwr_reduction = 0; sdata->vif.bss_conf.tx_pwr_env_num = 0; memset(sdata->vif.bss_conf.tx_pwr_env, 0, sizeof(sdata->vif.bss_conf.tx_pwr_env)); memset(&sdata->u.mgd.ttlm_info, 0, sizeof(sdata->u.mgd.ttlm_info)); wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); ieee80211_vif_set_links(sdata, 0, 0); } static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_local *local = sdata->local; lockdep_assert_wiphy(local->hw.wiphy); if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) return; __ieee80211_stop_poll(sdata); ieee80211_recalc_ps(local); if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) return; /* * We've received a probe response, but are not sure whether * we have or will be receiving any beacons or data, so let's * schedule the timers again, just in case. */ ieee80211_sta_reset_beacon_monitor(sdata); mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); } static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, struct ieee80211_hdr *hdr, u16 tx_time) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; u16 tid; int ac; struct ieee80211_sta_tx_tspec *tx_tspec; unsigned long now = jiffies; if (!ieee80211_is_data_qos(hdr->frame_control)) return; tid = ieee80211_get_tid(hdr); ac = ieee80211_ac_from_tid(tid); tx_tspec = &ifmgd->tx_tspec[ac]; if (likely(!tx_tspec->admitted_time)) return; if (time_after(now, tx_tspec->time_slice_start + HZ)) { tx_tspec->consumed_tx_time = 0; tx_tspec->time_slice_start = now; if (tx_tspec->downgraded) { tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; wiphy_delayed_work_queue(sdata->local->hw.wiphy, &ifmgd->tx_tspec_wk, 0); } } if (tx_tspec->downgraded) return; tx_tspec->consumed_tx_time += tx_time; if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { tx_tspec->downgraded = true; tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; wiphy_delayed_work_queue(sdata->local->hw.wiphy, &ifmgd->tx_tspec_wk, 0); } } void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, struct ieee80211_hdr *hdr, bool ack, u16 tx_time) { ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); if (!ieee80211_is_any_nullfunc(hdr->frame_control) || !sdata->u.mgd.probe_send_count) return; if (ack) sdata->u.mgd.probe_send_count = 0; else sdata->u.mgd.nullfunc_failed = true; wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); } static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, const u8 *src, const u8 *dst, const u8 *ssid, size_t ssid_len, struct ieee80211_channel *channel) { struct sk_buff *skb; skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, ssid, ssid_len, NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); if (skb) ieee80211_tx_skb(sdata, skb); } static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; u8 *dst = sdata->vif.cfg.ap_addr; u8 unicast_limit = max(1, max_probe_tries - 3); struct sta_info *sta; lockdep_assert_wiphy(sdata->local->hw.wiphy); if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) return; /* * Try sending broadcast probe requests for the last three * probe requests after the first ones failed since some * buggy APs only support broadcast probe requests. */ if (ifmgd->probe_send_count >= unicast_limit) dst = NULL; /* * When the hardware reports an accurate Tx ACK status, it's * better to send a nullfunc frame instead of a probe request, * as it will kick us off the AP quickly if we aren't associated * anymore. The timeout will be reset if the frame is ACKed by * the AP. */ ifmgd->probe_send_count++; if (dst) { sta = sta_info_get(sdata, dst); if (!WARN_ON(!sta)) ieee80211_check_fast_rx(sta); } if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { ifmgd->nullfunc_failed = false; ieee80211_send_nullfunc(sdata->local, sdata, false); } else { ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, sdata->vif.cfg.ssid, sdata->vif.cfg.ssid_len, sdata->deflink.u.mgd.bss->channel); } ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); run_again(sdata, ifmgd->probe_timeout); } static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, bool beacon) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; bool already = false; lockdep_assert_wiphy(sdata->local->hw.wiphy); if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) return; if (!ieee80211_sdata_running(sdata)) return; if (!ifmgd->associated) return; if (sdata->local->tmp_channel || sdata->local->scanning) return; if (sdata->local->suspending) { /* reschedule after resume */ ieee80211_reset_ap_probe(sdata); return; } if (beacon) { mlme_dbg_ratelimited(sdata, "detected beacon loss from AP (missed %d beacons) - probing\n", beacon_loss_count); ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); } /* * The driver/our work has already reported this event or the * connection monitoring has kicked in and we have already sent * a probe request. Or maybe the AP died and the driver keeps * reporting until we disassociate... * * In either case we have to ignore the current call to this * function (except for setting the correct probe reason bit) * because otherwise we would reset the timer every time and * never check whether we received a probe response! */ if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) already = true; ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; if (already) return; ieee80211_recalc_ps(sdata->local); ifmgd->probe_send_count = 0; ieee80211_mgd_probe_ap_send(sdata); } struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct cfg80211_bss *cbss; struct sk_buff *skb; const struct element *ssid; int ssid_len; lockdep_assert_wiphy(sdata->local->hw.wiphy); if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || ieee80211_vif_is_mld(&sdata->vif))) return NULL; if (ifmgd->associated) cbss = sdata->deflink.u.mgd.bss; else if (ifmgd->auth_data) cbss = ifmgd->auth_data->bss; else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) cbss = ifmgd->assoc_data->link[0].bss; else return NULL; rcu_read_lock(); ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, "invalid SSID element (len=%d)", ssid ? ssid->datalen : -1)) ssid_len = 0; else ssid_len = ssid->datalen; skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, (u32) -1, cbss->channel, ssid->data, ssid_len, NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); rcu_read_unlock(); return skb; } EXPORT_SYMBOL(ieee80211_ap_probereq_get); static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, const u8 *buf, size_t len, bool tx, u16 reason, bool reconnect) { struct ieee80211_event event = { .type = MLME_EVENT, .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, .u.mlme.reason = reason, }; if (tx) cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); else cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); drv_event_callback(sdata->local, sdata, &event); } static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) { struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; bool tx; lockdep_assert_wiphy(local->hw.wiphy); if (!ifmgd->associated) return; /* in MLO assume we have a link where we can TX the frame */ tx = ieee80211_vif_is_mld(&sdata->vif) || !sdata->deflink.csa_block_tx; if (!ifmgd->driver_disconnect) { unsigned int link_id; /* * AP is probably out of range (or not reachable for another * reason) so remove the bss structs for that AP. In the case * of multi-link, it's not clear that all of them really are * out of range, but if they weren't the driver likely would * have switched to just have a single link active? */ for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { struct ieee80211_link_data *link; link = sdata_dereference(sdata->link[link_id], sdata); if (!link) continue; cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); link->u.mgd.bss = NULL; } } ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, ifmgd->driver_disconnect ? WLAN_REASON_DEAUTH_LEAVING : WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, tx, frame_buf); /* the other links will be destroyed */ sdata->vif.bss_conf.csa_active = false; sdata->deflink.u.mgd.csa_waiting_bcn = false; if (sdata->deflink.csa_block_tx) { ieee80211_wake_vif_queues(local, sdata, IEEE80211_QUEUE_STOP_REASON_CSA); sdata->deflink.csa_block_tx = false; } ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, ifmgd->reconnect); ifmgd->reconnect = false; } static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, struct wiphy_work *work) { struct ieee80211_sub_if_data *sdata = container_of(work, struct ieee80211_sub_if_data, u.mgd.beacon_connection_loss_work); struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; if (ifmgd->connection_loss) { sdata_info(sdata, "Connection to AP %pM lost\n", sdata->vif.cfg.ap_addr); __ieee80211_disconnect(sdata); ifmgd->connection_loss = false; } else if (ifmgd->driver_disconnect) { sdata_info(sdata, "Driver requested disconnection from AP %pM\n", sdata->vif.cfg.ap_addr); __ieee80211_disconnect(sdata); ifmgd->driver_disconnect = false; } else { if (ifmgd->associated) sdata->deflink.u.mgd.beacon_loss_count++; ieee80211_mgd_probe_ap(sdata, true); } } static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, struct wiphy_work *work) { struct ieee80211_sub_if_data *sdata = container_of(work, struct ieee80211_sub_if_data, u.mgd.csa_connection_drop_work); __ieee80211_disconnect(sdata); } void ieee80211_beacon_loss(struct ieee80211_vif *vif) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); struct ieee80211_hw *hw = &sdata->local->hw; trace_api_beacon_loss(sdata); sdata->u.mgd.connection_loss = false; wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); } EXPORT_SYMBOL(ieee80211_beacon_loss); void ieee80211_connection_loss(struct ieee80211_vif *vif) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); struct ieee80211_hw *hw = &sdata->local->hw; trace_api_connection_loss(sdata); sdata->u.mgd.connection_loss = true; wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); } EXPORT_SYMBOL(ieee80211_connection_loss); void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); struct ieee80211_hw *hw = &sdata->local->hw; trace_api_disconnect(sdata, reconnect); if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) return; sdata->u.mgd.driver_disconnect = true; sdata->u.mgd.reconnect = reconnect; wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); } EXPORT_SYMBOL(ieee80211_disconnect); static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, bool assoc) { struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; lockdep_assert_wiphy(sdata->local->hw.wiphy); if (!assoc) { /* * we are not authenticated yet, the only timer that could be * running is the timeout for the authentication response which * which is not relevant anymore. */ del_timer_sync(&sdata->u.mgd.timer); sta_info_destroy_addr(sdata, auth_data->ap_addr); /* other links are destroyed */ sdata->deflink.u.mgd.conn_flags = 0; eth_zero_addr(sdata->deflink.u.mgd.bssid); ieee80211_link_info_change_notify(sdata, &sdata->deflink, BSS_CHANGED_BSSID); sdata->u.mgd.flags = 0; ieee80211_link_release_channel(&sdata->deflink); ieee80211_vif_set_links(sdata, 0, 0); } cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); kfree(auth_data); sdata->u.mgd.auth_data = NULL; } enum assoc_status { ASSOC_SUCCESS, ASSOC_REJECTED, ASSOC_TIMEOUT, ASSOC_ABANDON, }; static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, enum assoc_status status) { struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; lockdep_assert_wiphy(sdata->local->hw.wiphy); if (status != ASSOC_SUCCESS) { /* * we are not associated yet, the only timer that could be * running is the timeout for the association response which * which is not relevant anymore. */ del_timer_sync(&sdata->u.mgd.timer); sta_info_destroy_addr(sdata, assoc_data->ap_addr); sdata->deflink.u.mgd.conn_flags = 0; eth_zero_addr(sdata->deflink.u.mgd.bssid); ieee80211_link_info_change_notify(sdata, &sdata->deflink, BSS_CHANGED_BSSID); sdata->u.mgd.flags = 0; sdata->vif.bss_conf.mu_mimo_owner = false; if (status != ASSOC_REJECTED) { struct cfg80211_assoc_failure data = { .timeout = status == ASSOC_TIMEOUT, }; int i; BUILD_BUG_ON(ARRAY_SIZE(data.bss) != ARRAY_SIZE(assoc_data->link)); for (i = 0; i < ARRAY_SIZE(data.bss); i++) data.bss[i] = assoc_data->link[i].bss; if (ieee80211_vif_is_mld(&sdata->vif)) data.ap_mld_addr = assoc_data->ap_addr; cfg80211_assoc_failure(sdata->dev, &data); } ieee80211_link_release_channel(&sdata->deflink); ieee80211_vif_set_links(sdata, 0, 0); } kfree(assoc_data); sdata->u.mgd.assoc_data = NULL; } static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len) { struct ieee80211_local *local = sdata->local; struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; const struct element *challenge; u8 *pos; u32 tx_flags = 0; struct ieee80211_prep_tx_info info = { .subtype = IEEE80211_STYPE_AUTH, .link_id = auth_data->link_id, }; pos = mgmt->u.auth.variable; challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, len - (pos - (u8 *)mgmt)); if (!challenge) return; auth_data->expected_transaction = 4; drv_mgd_prepare_tx(sdata->local, sdata, &info); if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | IEEE80211_TX_INTFL_MLME_CONN_TX; ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, (void *)challenge, challenge->datalen + sizeof(*challenge), auth_data->ap_addr, auth_data->ap_addr, auth_data->key, auth_data->key_len, auth_data->key_idx, tx_flags); } static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; const u8 *ap_addr = ifmgd->auth_data->ap_addr; struct sta_info *sta; lockdep_assert_wiphy(sdata->local->hw.wiphy); sdata_info(sdata, "authenticated\n"); ifmgd->auth_data->done = true; ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; ifmgd->auth_data->timeout_started = true; run_again(sdata, ifmgd->auth_data->timeout); /* move station state to auth */ sta = sta_info_get(sdata, ap_addr); if (!sta) { WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); return false; } if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); return false; } return true; } static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; u16 auth_alg, auth_transaction, status_code; struct ieee80211_event event = { .type = MLME_EVENT, .u.mlme.data = AUTH_EVENT, }; struct ieee80211_prep_tx_info info = { .subtype = IEEE80211_STYPE_AUTH, }; lockdep_assert_wiphy(sdata->local->hw.wiphy); if (len < 24 + 6) return; if (!ifmgd->auth_data || ifmgd->auth_data->done) return; if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) return; auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); status_code = le16_to_cpu(mgmt->u.auth.status_code); if (auth_alg != ifmgd->auth_data->algorithm || (auth_alg != WLAN_AUTH_SAE && auth_transaction != ifmgd->auth_data->expected_transaction) || (auth_alg == WLAN_AUTH_SAE && (auth_transaction < ifmgd->auth_data->expected_transaction || auth_transaction > 2))) { sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, auth_transaction, ifmgd->auth_data->expected_transaction); goto notify_driver; } if (status_code != WLAN_STATUS_SUCCESS) { cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); if (auth_alg == WLAN_AUTH_SAE && (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || (auth_transaction == 1 && (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || status_code == WLAN_STATUS_SAE_PK)))) { /* waiting for userspace now */ ifmgd->auth_data->waiting = true; ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; ifmgd->auth_data->timeout_started = true; run_again(sdata, ifmgd->auth_data->timeout); goto notify_driver; } sdata_info(sdata, "%pM denied authentication (status %d)\n", mgmt->sa, status_code); ieee80211_destroy_auth_data(sdata, false); event.u.mlme.status = MLME_DENIED; event.u.mlme.reason = status_code; drv_event_callback(sdata->local, sdata, &event); goto notify_driver; } switch (ifmgd->auth_data->algorithm) { case WLAN_AUTH_OPEN: case WLAN_AUTH_LEAP: case WLAN_AUTH_FT: case WLAN_AUTH_SAE: case WLAN_AUTH_FILS_SK: case WLAN_AUTH_FILS_SK_PFS: case WLAN_AUTH_FILS_PK: break; case WLAN_AUTH_SHARED_KEY: if (ifmgd->auth_data->expected_transaction != 4) { ieee80211_auth_challenge(sdata, mgmt, len); /* need another frame */ return; } break; default: WARN_ONCE(1, "invalid auth alg %d", ifmgd->auth_data->algorithm); goto notify_driver; } event.u.mlme.status = MLME_SUCCESS; info.success = 1; drv_event_callback(sdata->local, sdata, &event); if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || (auth_transaction == 2 && ifmgd->auth_data->expected_transaction == 2)) { if (!ieee80211_mark_sta_auth(sdata)) return; /* ignore frame -- wait for timeout */ } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && auth_transaction == 2) { sdata_info(sdata, "SAE peer confirmed\n"); ifmgd->auth_data->peer_confirmed = true; } cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); notify_driver: drv_mgd_complete_tx(sdata->local, sdata, &info); } #define case_WLAN(type) \ case WLAN_REASON_##type: return #type const char *ieee80211_get_reason_code_string(u16 reason_code) { switch (reason_code) { case_WLAN(UNSPECIFIED); case_WLAN(PREV_AUTH_NOT_VALID); case_WLAN(DEAUTH_LEAVING); case_WLAN(DISASSOC_DUE_TO_INACTIVITY); case_WLAN(DISASSOC_AP_BUSY); case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); case_WLAN(DISASSOC_STA_HAS_LEFT); case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); case_WLAN(DISASSOC_BAD_POWER); case_WLAN(DISASSOC_BAD_SUPP_CHAN); case_WLAN(INVALID_IE); case_WLAN(MIC_FAILURE); case_WLAN(4WAY_HANDSHAKE_TIMEOUT); case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); case_WLAN(IE_DIFFERENT); case_WLAN(INVALID_GROUP_CIPHER); case_WLAN(INVALID_PAIRWISE_CIPHER); case_WLAN(INVALID_AKMP); case_WLAN(UNSUPP_RSN_VERSION); case_WLAN(INVALID_RSN_IE_CAP); case_WLAN(IEEE8021X_FAILED); case_WLAN(CIPHER_SUITE_REJECTED); case_WLAN(DISASSOC_UNSPECIFIED_QOS); case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); case_WLAN(DISASSOC_LOW_ACK); case_WLAN(DISASSOC_QAP_EXCEED_TXOP); case_WLAN(QSTA_LEAVE_QBSS); case_WLAN(QSTA_NOT_USE); case_WLAN(QSTA_REQUIRE_SETUP); case_WLAN(QSTA_TIMEOUT); case_WLAN(QSTA_CIPHER_NOT_SUPP); case_WLAN(MESH_PEER_CANCELED); case_WLAN(MESH_MAX_PEERS); case_WLAN(MESH_CONFIG); case_WLAN(MESH_CLOSE); case_WLAN(MESH_MAX_RETRIES); case_WLAN(MESH_CONFIRM_TIMEOUT); case_WLAN(MESH_INVALID_GTK); case_WLAN(MESH_INCONSISTENT_PARAM); case_WLAN(MESH_INVALID_SECURITY); case_WLAN(MESH_PATH_ERROR); case_WLAN(MESH_PATH_NOFORWARD); case_WLAN(MESH_PATH_DEST_UNREACHABLE); case_WLAN(MAC_EXISTS_IN_MBSS); case_WLAN(MESH_CHAN_REGULATORY); case_WLAN(MESH_CHAN); default: return "<unknown>"; } } static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); lockdep_assert_wiphy(sdata->local->hw.wiphy); if (len < 24 + 2) return; if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); return; } if (ifmgd->associated && ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", sdata->vif.cfg.ap_addr, reason_code, ieee80211_get_reason_code_string(reason_code)); ieee80211_set_disassoc(sdata, 0, 0, false, NULL); ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, false); return; } if (ifmgd->assoc_data && ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { sdata_info(sdata, "deauthenticated from %pM while associating (Reason: %u=%s)\n", ifmgd->assoc_data->ap_addr, reason_code, ieee80211_get_reason_code_string(reason_code)); ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); return; } } static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; u16 reason_code; lockdep_assert_wiphy(sdata->local->hw.wiphy); if (len < 24 + 2) return; if (!ifmgd->associated || !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) return; reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); return; } sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", sdata->vif.cfg.ap_addr, reason_code, ieee80211_get_reason_code_string(reason_code)); ieee80211_set_disassoc(sdata, 0, 0, false, NULL); ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, false); } static void ieee80211_get_rates(struct ieee80211_supported_band *sband, u8 *supp_rates, unsigned int supp_rates_len, u32 *rates, u32 *basic_rates, bool *have_higher_than_11mbit, int *min_rate, int *min_rate_index) { int i, j; for (i = 0; i < supp_rates_len; i++) { int rate = supp_rates[i] & 0x7f; bool is_basic = !!(supp_rates[i] & 0x80); if ((rate * 5) > 110) *have_higher_than_11mbit = true; /* * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership * selectors since they're not rates. * * Note: Even though the membership selector and the basic * rate flag share the same bit, they are not exactly * the same. */ if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) continue; for (j = 0; j < sband->n_bitrates; j++) { struct ieee80211_rate *br; int brate; br = &sband->bitrates[j]; brate = DIV_ROUND_UP(br->bitrate, 5); if (brate == rate) { *rates |= BIT(j); if (is_basic) *basic_rates |= BIT(j); if ((rate * 5) < *min_rate) { *min_rate = rate * 5; *min_rate_index = j; } break; } } } } static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, struct ieee80211_supported_band *sband, const struct link_sta_info *link_sta, const struct ieee802_11_elems *elems) { const struct ieee80211_sta_he_cap *own_he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); if (elems->ext_capab_len < 10) return false; if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) return false; return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & IEEE80211_HE_MAC_CAP0_TWT_RES && own_he_cap && (own_he_cap->he_cap_elem.mac_cap_info[0] & IEEE80211_HE_MAC_CAP0_TWT_REQ); } static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, struct ieee80211_supported_band *sband, struct ieee80211_link_data *link, struct link_sta_info *link_sta, struct ieee802_11_elems *elems) { bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); if (link->conf->twt_requester != twt) { link->conf->twt_requester = twt; return BSS_CHANGED_TWT; } return 0; } static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, struct ieee80211_bss_conf *bss_conf, struct ieee80211_supported_band *sband, struct link_sta_info *link_sta) { const struct ieee80211_sta_he_cap *own_he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); return bss_conf->he_support && (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & IEEE80211_HE_MAC_CAP2_BCAST_TWT) && own_he_cap && (own_he_cap->he_cap_elem.mac_cap_info[2] & IEEE80211_HE_MAC_CAP2_BCAST_TWT); } static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, struct link_sta_info *link_sta, struct cfg80211_bss *cbss, struct ieee80211_mgmt *mgmt, const u8 *elem_start, unsigned int elem_len, u64 *changed) { struct ieee80211_sub_if_data *sdata = link->sdata; struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; struct ieee80211_bss_conf *bss_conf = link->conf; struct ieee80211_local *local = sdata->local; unsigned int link_id = link->link_id; struct ieee80211_elems_parse_params parse_params = { .start = elem_start, .len = elem_len, .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, .from_ap = true, }; bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; const struct cfg80211_bss_ies *bss_ies = NULL; struct ieee80211_supported_band *sband; struct ieee802_11_elems *elems; const __le16 prof_bss_param_ch_present = cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); u16 capab_info; bool ret; elems = ieee802_11_parse_elems_full(&parse_params); if (!elems) return false; if (link_id == assoc_data->assoc_link_id) { capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); /* * we should not get to this flow unless the association was * successful, so set the status directly to success */ assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; if (elems->ml_basic) { if (!(elems->ml_basic->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_BSS_PARAM_CH_CNT))) { ret = false; goto out; } link->u.mgd.bss_param_ch_cnt = ieee80211_mle_get_bss_param_ch_cnt(elems->ml_basic); } } else if (!elems->prof || !(elems->prof->control & prof_bss_param_ch_present)) { ret = false; goto out; } else { const u8 *ptr = elems->prof->variable + elems->prof->sta_info_len - 1; /* * During parsing, we validated that these fields exist, * otherwise elems->prof would have been set to NULL. */ capab_info = get_unaligned_le16(ptr); assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); link->u.mgd.bss_param_ch_cnt = ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { link_info(link, "association response status code=%u\n", assoc_data->link[link_id].status); ret = true; goto out; } } if (!is_s1g && !elems->supp_rates) { sdata_info(sdata, "no SuppRates element in AssocResp\n"); ret = false; goto out; } link->u.mgd.tdls_chan_switch_prohibited = elems->ext_capab && elems->ext_capab_len >= 5 && (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); /* * Some APs are erroneously not including some information in their * (re)association response frames. Try to recover by using the data * from the beacon or probe response. This seems to afflict mobile * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. */ if (!is_6ghz && ((assoc_data->wmm && !elems->wmm_param) || (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && (!elems->ht_cap_elem || !elems->ht_operation)) || (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && (!elems->vht_cap_elem || !elems->vht_operation)))) { const struct cfg80211_bss_ies *ies; struct ieee802_11_elems *bss_elems; rcu_read_lock(); ies = rcu_dereference(cbss->ies); if (ies) bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, GFP_ATOMIC); rcu_read_unlock(); if (!bss_ies) { ret = false; goto out; } parse_params.start = bss_ies->data; parse_params.len = bss_ies->len; parse_params.bss = cbss; bss_elems = ieee802_11_parse_elems_full(&parse_params); if (!bss_elems) { ret = false; goto out; } if (assoc_data->wmm && !elems->wmm_param && bss_elems->wmm_param) { elems->wmm_param = bss_elems->wmm_param; sdata_info(sdata, "AP bug: WMM param missing from AssocResp\n"); } /* * Also check if we requested HT/VHT, otherwise the AP doesn't * have to include the IEs in the (re)association response. */ if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { elems->ht_cap_elem = bss_elems->ht_cap_elem; sdata_info(sdata, "AP bug: HT capability missing from AssocResp\n"); } if (!elems->ht_operation && bss_elems->ht_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { elems->ht_operation = bss_elems->ht_operation; sdata_info(sdata, "AP bug: HT operation missing from AssocResp\n"); } if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { elems->vht_cap_elem = bss_elems->vht_cap_elem; sdata_info(sdata, "AP bug: VHT capa missing from AssocResp\n"); } if (!elems->vht_operation && bss_elems->vht_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { elems->vht_operation = bss_elems->vht_operation; sdata_info(sdata, "AP bug: VHT operation missing from AssocResp\n"); } kfree(bss_elems); } /* * We previously checked these in the beacon/probe response, so * they should be present here. This is just a safety net. */ if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { sdata_info(sdata, "HT AP is missing WMM params or HT capability/operation\n"); ret = false; goto out; } if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && (!elems->vht_cap_elem || !elems->vht_operation)) { sdata_info(sdata, "VHT AP is missing VHT capability/operation\n"); ret = false; goto out; } if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && !elems->he_6ghz_capa) { sdata_info(sdata, "HE 6 GHz AP is missing HE 6 GHz band capability\n"); ret = false; goto out; } if (WARN_ON(!link->conf->chandef.chan)) { ret = false; goto out; } sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && (!elems->he_cap || !elems->he_operation)) { sdata_info(sdata, "HE AP is missing HE capability/operation\n"); ret = false; goto out; } /* Set up internal HT/VHT capabilities */ if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, elems->ht_cap_elem, link_sta); if (elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { const struct ieee80211_vht_cap *bss_vht_cap = NULL; const struct cfg80211_bss_ies *ies; /* * Cisco AP module 9115 with FW 17.3 has a bug and sends a * too large maximum MPDU length in the association response * (indicating 12k) that it cannot actually process ... * Work around that. */ rcu_read_lock(); ies = rcu_dereference(cbss->ies); if (ies) { const struct element *elem; elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, ies->data, ies->len); if (elem && elem->datalen >= sizeof(*bss_vht_cap)) bss_vht_cap = (const void *)elem->data; } ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, elems->vht_cap_elem, bss_vht_cap, link_sta); rcu_read_unlock(); } if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && elems->he_cap) { ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, elems->he_cap, elems->he_cap_len, elems->he_6ghz_capa, link_sta); bss_conf->he_support = link_sta->pub->he_cap.has_he; if (elems->rsnx && elems->rsnx_len && (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_PROTECTED_TWT)) bss_conf->twt_protected = true; else bss_conf->twt_protected = false; *changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); if (elems->eht_operation && elems->eht_cap && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, elems->he_cap, elems->he_cap_len, elems->eht_cap, elems->eht_cap_len, link_sta); bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; *changed |= BSS_CHANGED_EHT_PUNCTURING; } else { bss_conf->eht_support = false; } } else { bss_conf->he_support = false; bss_conf->twt_requester = false; bss_conf->twt_protected = false; bss_conf->eht_support = false; } bss_conf->twt_broadcast = ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); if (bss_conf->he_support) { bss_conf->he_bss_color.color = le32_get_bits(elems->he_operation->he_oper_params, IEEE80211_HE_OPERATION_BSS_COLOR_MASK); bss_conf->he_bss_color.partial = le32_get_bits(elems->he_operation->he_oper_params, IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); bss_conf->he_bss_color.enabled = !le32_get_bits(elems->he_operation->he_oper_params, IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); if (bss_conf->he_bss_color.enabled) *changed |= BSS_CHANGED_HE_BSS_COLOR; bss_conf->htc_trig_based_pkt_ext = le32_get_bits(elems->he_operation->he_oper_params, IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); bss_conf->frame_time_rts_th = le32_get_bits(elems->he_operation->he_oper_params, IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); bss_conf->uora_exists = !!elems->uora_element; if (elems->uora_element) bss_conf->uora_ocw_range = elems->uora_element[0]; ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); /* TODO: OPEN: what happens if BSS color disable is set? */ } if (cbss->transmitted_bss) { bss_conf->nontransmitted = true; ether_addr_copy(bss_conf->transmitter_bssid, cbss->transmitted_bss->bssid); bss_conf->bssid_indicator = cbss->max_bssid_indicator; bss_conf->bssid_index = cbss->bssid_index; } /* * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data * in their association response, so ignore that data for our own * configuration. If it changed since the last beacon, we'll get the * next beacon and update then. */ /* * If an operating mode notification IE is present, override the * NSS calculation (that would be done in rate_control_rate_init()) * and use the # of streams from that element. */ if (elems->opmode_notif && !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { u8 nss; nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; nss += 1; link_sta->pub->rx_nss = nss; } /* * Always handle WMM once after association regardless * of the first value the AP uses. Setting -1 here has * that effect because the AP values is an unsigned * 4-bit value. */ link->u.mgd.wmm_last_param_set = -1; link->u.mgd.mu_edca_last_param_set = -1; if (link->u.mgd.disable_wmm_tracking) { ieee80211_set_wmm_default(link, false, false); } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, elems->wmm_param_len, elems->mu_edca_param_set)) { /* still enable QoS since we might have HT/VHT */ ieee80211_set_wmm_default(link, false, true); /* disable WMM tracking in this case to disable * tracking WMM parameter changes in the beacon if * the parameters weren't actually valid. Doing so * avoids changing parameters very strangely when * the AP is going back and forth between valid and * invalid parameters. */ link->u.mgd.disable_wmm_tracking = true; } if (elems->max_idle_period_ie) { bss_conf->max_idle_period = le16_to_cpu(elems->max_idle_period_ie->max_idle_period); bss_conf->protected_keep_alive = !!(elems->max_idle_period_ie->idle_options & WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); *changed |= BSS_CHANGED_KEEP_ALIVE; } else { bss_conf->max_idle_period = 0; bss_conf->protected_keep_alive = false; } /* set assoc capability (AID was already set earlier), * ieee80211_set_associated() will tell the driver */ bss_conf->assoc_capability = capab_info; ret = true; out: kfree(elems); kfree(bss_ies); return ret; } static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, struct sta_info *sta, struct link_sta_info *link_sta, struct cfg80211_bss *cbss) { struct ieee80211_sub_if_data *sdata = link->sdata; struct ieee80211_local *local = sdata->local; struct ieee80211_bss *bss = (void *)cbss->priv; u32 rates = 0, basic_rates = 0; bool have_higher_than_11mbit = false; int min_rate = INT_MAX, min_rate_index = -1; struct ieee80211_supported_band *sband; memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); /* TODO: S1G Basic Rate Set is expressed elsewhere */ if (cbss->channel->band == NL80211_BAND_S1GHZ) { ieee80211_s1g_sta_rate_init(sta); return 0; } sband = local->hw.wiphy->bands[cbss->channel->band]; ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, &rates, &basic_rates, &have_higher_than_11mbit, &min_rate, &min_rate_index); /* * This used to be a workaround for basic rates missing * in the association response frame. Now that we no * longer use the basic rates from there, it probably * doesn't happen any more, but keep the workaround so * in case some *other* APs are buggy in different ways * we can connect -- with a warning. * Allow this workaround only in case the AP provided at least * one rate. */ if (min_rate_index < 0) { link_info(link, "No legacy rates in association response\n"); return -EINVAL; } else if (!basic_rates) { link_info(link, "No basic rates, using min rate instead\n"); basic_rates = BIT(min_rate_index); } if (rates) link_sta->pub->supp_rates[cbss->channel->band] = rates; else link_info(link, "No rates found, keeping mandatory only\n"); link->conf->basic_rates = basic_rates; /* cf. IEEE 802.11 9.2.12 */ link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && have_higher_than_11mbit; return 0; } static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, struct cfg80211_bss *cbss) { struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; const struct element *ht_cap_elem, *vht_cap_elem; const struct cfg80211_bss_ies *ies; const struct ieee80211_ht_cap *ht_cap; const struct ieee80211_vht_cap *vht_cap; const struct ieee80211_he_cap_elem *he_cap; const struct element *he_cap_elem; u16 mcs_80_map, mcs_160_map; int i, mcs_nss_size; bool support_160; u8 chains = 1; if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) return chains; ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { ht_cap = (void *)ht_cap_elem->data; chains = ieee80211_mcs_to_chains(&ht_cap->mcs); /* * TODO: use "Tx Maximum Number Spatial Streams Supported" and * "Tx Unequal Modulation Supported" fields. */ } if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) return chains; vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { u8 nss; u16 tx_mcs_map; vht_cap = (void *)vht_cap_elem->data; tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); for (nss = 8; nss > 0; nss--) { if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != IEEE80211_VHT_MCS_NOT_SUPPORTED) break; } /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ chains = max(chains, nss); } if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) return chains; ies = rcu_dereference(cbss->ies); he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, ies->data, ies->len); if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) return chains; /* skip one byte ext_tag_id */ he_cap = (void *)(he_cap_elem->data + 1); mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); /* invalid HE IE */ if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) return chains; /* mcs_nss is right after he_cap info */ he_mcs_nss_supp = (void *)(he_cap + 1); mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); for (i = 7; i >= 0; i--) { u8 mcs_80 = mcs_80_map >> (2 * i) & 3; if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { chains = max_t(u8, chains, i + 1); break; } } support_160 = he_cap->phy_cap_info[0] & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; if (!support_160) return chains; mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); for (i = 7; i >= 0; i--) { u8 mcs_160 = mcs_160_map >> (2 * i) & 3; if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { chains = max_t(u8, chains, i + 1); break; } } return chains; } static bool ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, const struct cfg80211_bss_ies *ies, const struct ieee80211_he_operation *he_op) { const struct element *he_cap_elem; const struct ieee80211_he_cap_elem *he_cap; struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; u16 mcs_80_map_tx, mcs_80_map_rx; u16 ap_min_req_set; int mcs_nss_size; int nss; he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, ies->data, ies->len); if (!he_cap_elem) return false; /* invalid HE IE */ if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) { sdata_info(sdata, "Invalid HE elem, Disable HE\n"); return false; } /* skip one byte ext_tag_id */ he_cap = (void *)(he_cap_elem->data + 1); mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); /* invalid HE IE */ if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { sdata_info(sdata, "Invalid HE elem with nss size, Disable HE\n"); return false; } /* mcs_nss is right after he_cap info */ he_mcs_nss_supp = (void *)(he_cap + 1); mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); /* P802.11-REVme/D0.3 * 27.1.1 Introduction to the HE PHY * ... * An HE STA shall support the following features: * ... * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all * supported channel widths for HE SU PPDUs */ if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { sdata_info(sdata, "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", mcs_80_map_tx, mcs_80_map_rx); return false; } if (!he_op) return true; ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); /* * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all * zeroes, which is nonsense, and completely inconsistent with itself * (it doesn't have 8 streams). Accept the settings in this case anyway. */ if (!ap_min_req_set) return true; /* make sure the AP is consistent with itself * * P802.11-REVme/D0.3 * 26.17.1 Basic HE BSS operation * * A STA that is operating in an HE BSS shall be able to receive and * transmit at each of the <HE-MCS, NSS> tuple values indicated by the * Basic HE-MCS And NSS Set field of the HE Operation parameter of the * MLME-START.request primitive and shall be able to receive at each of * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and * NSS Set field in the HE Capabilities parameter of the MLMESTART.request * primitive */ for (nss = 8; nss > 0; nss--) { u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; u8 ap_rx_val; u8 ap_tx_val; if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) continue; ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { sdata_info(sdata, "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", nss, ap_rx_val, ap_rx_val, ap_op_val); return false; } } return true; } static bool ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, struct ieee80211_supported_band *sband, const struct ieee80211_he_operation *he_op) { const struct ieee80211_sta_he_cap *sta_he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); u16 ap_min_req_set; int i; if (!sta_he_cap || !he_op) return false; ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); /* * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all * zeroes, which is nonsense, and completely inconsistent with itself * (it doesn't have 8 streams). Accept the settings in this case anyway. */ if (!ap_min_req_set) return true; /* Need to go over for 80MHz, 160MHz and for 80+80 */ for (i = 0; i < 3; i++) { const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = &sta_he_cap->he_mcs_nss_supp; u16 sta_mcs_map_rx = le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); u16 sta_mcs_map_tx = le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); u8 nss; bool verified = true; /* * For each band there is a maximum of 8 spatial streams * possible. Each of the sta_mcs_map_* is a 16-bit struct built * of 2 bits per NSS (1-8), with the values defined in enum * ieee80211_he_mcs_support. Need to make sure STA TX and RX * capabilities aren't less than the AP's minimum requirements * for this HE BSS per SS. * It is enough to find one such band that meets the reqs. */ for (nss = 8; nss > 0; nss--) { u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) continue; /* * Make sure the HE AP doesn't require MCSs that aren't * supported by the client as required by spec * * P802.11-REVme/D0.3 * 26.17.1 Basic HE BSS operation * * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) * a BSS, unless it supports (i.e., is able to both transmit and * receive using) all of the <HE-MCS, NSS> tuples in the basic * HE-MCS and NSS set. */ if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { verified = false; break; } } if (verified) return true; } /* If here, STA doesn't meet AP's HE min requirements */ return false; } static u8 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, const struct ieee80211_sta_eht_cap *sta_eht_cap, unsigned int idx, int bw) { u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; /* handle us being a 20 MHz-only EHT STA - with four values * for MCS 0-7, 8-9, 10-11, 12-13. */ if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; /* the others have MCS 0-9 together, rather than separately from 0-7 */ if (idx > 0) idx--; switch (bw) { case 0: return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; case 1: if (!(he_phy_cap0 & (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) return 0xff; /* pass check */ return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; case 2: if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) return 0xff; /* pass check */ return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; } WARN_ON(1); return 0; } static bool ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, struct ieee80211_supported_band *sband, const struct ieee80211_eht_operation *eht_op) { const struct ieee80211_sta_he_cap *sta_he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); const struct ieee80211_sta_eht_cap *sta_eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; unsigned int i; if (!sta_he_cap || !sta_eht_cap || !eht_op) return false; req = &eht_op->basic_mcs_nss; for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { u8 req_rx_nss, req_tx_nss; unsigned int bw; req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], IEEE80211_EHT_MCS_NSS_RX); req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], IEEE80211_EHT_MCS_NSS_TX); for (bw = 0; bw < 3; bw++) { u8 have, have_rx_nss, have_tx_nss; have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, sta_eht_cap, i, bw); have_rx_nss = u8_get_bits(have, IEEE80211_EHT_MCS_NSS_RX); have_tx_nss = u8_get_bits(have, IEEE80211_EHT_MCS_NSS_TX); if (req_rx_nss > have_rx_nss || req_tx_nss > have_tx_nss) return false; } } return true; } static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, struct ieee80211_link_data *link, struct cfg80211_bss *cbss, bool mlo, ieee80211_conn_flags_t *conn_flags) { struct ieee80211_local *local = sdata->local; const struct ieee80211_ht_cap *ht_cap = NULL; const struct ieee80211_ht_operation *ht_oper = NULL; const struct ieee80211_vht_operation *vht_oper = NULL; const struct ieee80211_he_operation *he_oper = NULL; const struct ieee80211_eht_operation *eht_oper = NULL; const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; struct ieee80211_supported_band *sband; struct cfg80211_chan_def chandef; bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; bool supports_mlo = false; struct ieee80211_bss *bss = (void *)cbss->priv; struct ieee80211_elems_parse_params parse_params = { .link_id = -1, .from_ap = true, }; struct ieee802_11_elems *elems; const struct cfg80211_bss_ies *ies; int ret; u32 i; bool have_80mhz; lockdep_assert_wiphy(local->hw.wiphy); rcu_read_lock(); ies = rcu_dereference(cbss->ies); parse_params.start = ies->data; parse_params.len = ies->len; elems = ieee802_11_parse_elems_full(&parse_params); if (!elems) { rcu_read_unlock(); return -ENOMEM; } sband = local->hw.wiphy->bands[cbss->channel->band]; *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | IEEE80211_CONN_DISABLE_80P80MHZ | IEEE80211_CONN_DISABLE_160MHZ); /* disable HT/VHT/HE if we don't support them */ if (!sband->ht_cap.ht_supported && !is_6ghz) { mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); *conn_flags |= IEEE80211_CONN_DISABLE_HT; *conn_flags |= IEEE80211_CONN_DISABLE_VHT; *conn_flags |= IEEE80211_CONN_DISABLE_HE; *conn_flags |= IEEE80211_CONN_DISABLE_EHT; } if (!sband->vht_cap.vht_supported && is_5ghz) { mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); *conn_flags |= IEEE80211_CONN_DISABLE_VHT; *conn_flags |= IEEE80211_CONN_DISABLE_HE; *conn_flags |= IEEE80211_CONN_DISABLE_EHT; } if (!ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif)) { mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); *conn_flags |= IEEE80211_CONN_DISABLE_HE; *conn_flags |= IEEE80211_CONN_DISABLE_EHT; } if (!ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif)) { mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); *conn_flags |= IEEE80211_CONN_DISABLE_EHT; } if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { ht_oper = elems->ht_operation; ht_cap = elems->ht_cap_elem; if (!ht_cap) { *conn_flags |= IEEE80211_CONN_DISABLE_HT; ht_oper = NULL; } } if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { vht_oper = elems->vht_operation; if (vht_oper && !ht_oper) { vht_oper = NULL; sdata_info(sdata, "AP advertised VHT without HT, disabling HT/VHT/HE\n"); *conn_flags |= IEEE80211_CONN_DISABLE_HT; *conn_flags |= IEEE80211_CONN_DISABLE_VHT; *conn_flags |= IEEE80211_CONN_DISABLE_HE; *conn_flags |= IEEE80211_CONN_DISABLE_EHT; } if (!elems->vht_cap_elem) { *conn_flags |= IEEE80211_CONN_DISABLE_VHT; vht_oper = NULL; } } if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { he_oper = elems->he_operation; if (link && is_6ghz) { struct ieee80211_bss_conf *bss_conf; u8 j = 0; bss_conf = link->conf; if (elems->pwr_constr_elem) bss_conf->pwr_reduction = *elems->pwr_constr_elem; BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != ARRAY_SIZE(elems->tx_pwr_env)); for (i = 0; i < elems->tx_pwr_env_num; i++) { if (elems->tx_pwr_env_len[i] > sizeof(bss_conf->tx_pwr_env[j])) continue; bss_conf->tx_pwr_env_num++; memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], elems->tx_pwr_env_len[i]); j++; } } if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) *conn_flags |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; } /* * EHT requires HE to be supported as well. Specifically for 6 GHz * channels, the operation channel information can only be deduced from * both the 6 GHz operation information (from the HE operation IE) and * EHT operation. */ if (!(*conn_flags & (IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT)) && he_oper) { const struct cfg80211_bss_ies *cbss_ies; const struct element *eht_ml_elem; const u8 *eht_oper_ie; cbss_ies = rcu_dereference(cbss->ies); eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, cbss_ies->data, cbss_ies->len); if (eht_oper_ie && eht_oper_ie[1] >= 1 + sizeof(struct ieee80211_eht_operation)) eht_oper = (void *)(eht_oper_ie + 3); else eht_oper = NULL; if (!ieee80211_verify_sta_eht_mcs_support(sdata, sband, eht_oper)) *conn_flags |= IEEE80211_CONN_DISABLE_EHT; eht_ml_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, cbss_ies->data, cbss_ies->len); /* data + 1 / datalen - 1 since it's an extended element */ if (!(*conn_flags & IEEE80211_CONN_DISABLE_EHT) && eht_ml_elem && ieee80211_mle_type_ok(eht_ml_elem->data + 1, IEEE80211_ML_CONTROL_TYPE_BASIC, eht_ml_elem->datalen - 1)) { supports_mlo = true; sdata->vif.cfg.eml_cap = ieee80211_mle_get_eml_cap(eht_ml_elem->data + 1); sdata->vif.cfg.eml_med_sync_delay = ieee80211_mle_get_eml_med_sync_delay(eht_ml_elem->data + 1); } } /* Allow VHT if at least one channel on the sband supports 80 MHz */ have_80mhz = false; for (i = 0; i < sband->n_channels; i++) { if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | IEEE80211_CHAN_NO_80MHZ)) continue; have_80mhz = true; break; } if (!have_80mhz) { sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); *conn_flags |= IEEE80211_CONN_DISABLE_VHT; } if (sband->band == NL80211_BAND_S1GHZ) { s1g_oper = elems->s1g_oper; if (!s1g_oper) sdata_info(sdata, "AP missing S1G operation element?\n"); } *conn_flags |= ieee80211_determine_chantype(sdata, link, *conn_flags, sband, cbss->channel, bss->vht_cap_info, ht_oper, vht_oper, he_oper, eht_oper, s1g_oper, &chandef, false); if (link) link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), local->rx_chains); rcu_read_unlock(); /* the element data was RCU protected so no longer valid anyway */ kfree(elems); elems = NULL; if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); return -EINVAL; } if (mlo && !supports_mlo) { sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); return -EINVAL; } if (!link) return 0; /* * If this fails (possibly due to channel context sharing * on incompatible channels, e.g. 80+80 and 160 sharing the * same control channel) try to use a smaller bandwidth. */ ret = ieee80211_link_use_channel(link, &chandef, IEEE80211_CHANCTX_SHARED); /* don't downgrade for 5 and 10 MHz channels, though. */ if (chandef.width == NL80211_CHAN_WIDTH_5 || chandef.width == NL80211_CHAN_WIDTH_10) goto out; while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { *conn_flags |= ieee80211_chandef_downgrade(&chandef); ret = ieee80211_link_use_channel(link, &chandef, IEEE80211_CHANCTX_SHARED); } out: return ret; } static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, u8 *dtim_count, u8 *dtim_period) { const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, ies->len); const struct ieee80211_tim_ie *tim = NULL; const struct ieee80211_bssid_index *idx; bool valid = tim_ie && tim_ie[1] >= 2; if (valid) tim = (void *)(tim_ie + 2); if (dtim_count) *dtim_count = valid ? tim->dtim_count : 0; if (dtim_period) *dtim_period = valid ? tim->dtim_period : 0; /* Check if value is overridden by non-transmitted profile */ if (!idx_ie || idx_ie[1] < 3) return valid; idx = (void *)(idx_ie + 2); if (dtim_count) *dtim_count = idx->dtim_count; if (dtim_period) *dtim_period = idx->dtim_period; return true; } static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, struct ieee802_11_elems *elems, const u8 *elem_start, unsigned int elem_len) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; struct ieee80211_local *local = sdata->local; unsigned int link_id; struct sta_info *sta; u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; u16 valid_links = 0, dormant_links = 0; int err; lockdep_assert_wiphy(sdata->local->hw.wiphy); /* * station info was already allocated and inserted before * the association and should be available to us */ sta = sta_info_get(sdata, assoc_data->ap_addr); if (WARN_ON(!sta)) goto out_err; if (ieee80211_vif_is_mld(&sdata->vif)) { for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { if (!assoc_data->link[link_id].bss) continue; valid_links |= BIT(link_id); if (assoc_data->link[link_id].disabled) dormant_links |= BIT(link_id); if (link_id != assoc_data->assoc_link_id) { err = ieee80211_sta_allocate_link(sta, link_id); if (err) goto out_err; } } ieee80211_vif_set_links(sdata, valid_links, dormant_links); } for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; struct ieee80211_link_data *link; struct link_sta_info *link_sta; if (!cbss) continue; link = sdata_dereference(sdata->link[link_id], sdata); if (WARN_ON(!link)) goto out_err; if (ieee80211_vif_is_mld(&sdata->vif)) link_info(link, "local address %pM, AP link address %pM%s\n", link->conf->addr, assoc_data->link[link_id].bss->bssid, link_id == assoc_data->assoc_link_id ? " (assoc)" : ""); link_sta = rcu_dereference_protected(sta->link[link_id], lockdep_is_held(&local->hw.wiphy->mtx)); if (WARN_ON(!link_sta)) goto out_err; if (!link->u.mgd.have_beacon) { const struct cfg80211_bss_ies *ies; rcu_read_lock(); ies = rcu_dereference(cbss->beacon_ies); if (ies) link->u.mgd.have_beacon = true; else ies = rcu_dereference(cbss->ies); ieee80211_get_dtim(ies, &link->conf->sync_dtim_count, &link->u.mgd.dtim_period); link->conf->beacon_int = cbss->beacon_interval; rcu_read_unlock(); } link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; if (link_id != assoc_data->assoc_link_id) { err = ieee80211_prep_channel(sdata, link, cbss, true, &link->u.mgd.conn_flags); if (err) { link_info(link, "prep_channel failed\n"); goto out_err; } } err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, assoc_data->link[link_id].bss); if (err) goto out_err; if (!ieee80211_assoc_config_link(link, link_sta, assoc_data->link[link_id].bss, mgmt, elem_start, elem_len, &changed[link_id])) goto out_err; if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { valid_links &= ~BIT(link_id); ieee80211_sta_remove_link(sta, link_id); continue; } if (link_id != assoc_data->assoc_link_id) { err = ieee80211_sta_activate_link(sta, link_id); if (err) goto out_err; } } /* links might have changed due to rejected ones, set them again */ ieee80211_vif_set_links(sdata, valid_links, dormant_links); rate_control_rate_init(sta); if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { set_sta_flag(sta, WLAN_STA_MFP); sta->sta.mfp = true; } else { sta->sta.mfp = false; } ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, elems->ext_capab_len); sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && local->hw.queues >= IEEE80211_NUM_ACS; err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); if (err) { sdata_info(sdata, "failed to move station %pM to desired state\n", sta->sta.addr); WARN_ON(__sta_info_destroy(sta)); goto out_err; } if (sdata->wdev.use_4addr) drv_sta_set_4addr(local, sdata, &sta->sta, true); ieee80211_set_associated(sdata, assoc_data, changed); /* * If we're using 4-addr mode, let the AP know that we're * doing so, so that it can create the STA VLAN on its side */ if (ifmgd->use_4addr) ieee80211_send_4addr_nullfunc(local, sdata); /* * Start timer to probe the connection to the AP now. * Also start the timer that will detect beacon loss. */ ieee80211_sta_reset_beacon_monitor(sdata); ieee80211_sta_reset_conn_monitor(sdata); return true; out_err: eth_zero_addr(sdata->vif.cfg.ap_addr); return false; } static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; u16 capab_info, status_code, aid; struct ieee80211_elems_parse_params parse_params = { .bss = NULL, .link_id = -1, .from_ap = true, }; struct ieee802_11_elems *elems; int ac; const u8 *elem_start; unsigned int elem_len; bool reassoc; struct ieee80211_event event = { .type = MLME_EVENT, .u.mlme.data = ASSOC_EVENT, }; struct ieee80211_prep_tx_info info = {}; struct cfg80211_rx_assoc_resp_data resp = { .uapsd_queues = -1, }; u8 ap_mld_addr[ETH_ALEN] __aligned(2); unsigned int link_id; lockdep_assert_wiphy(sdata->local->hw.wiphy); if (!assoc_data) return; if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) return; /* * AssocResp and ReassocResp have identical structure, so process both * of them in this function. */ if (len < 24 + 6) return; reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); if (assoc_data->s1g) elem_start = mgmt->u.s1g_assoc_resp.variable; else elem_start = mgmt->u.assoc_resp.variable; /* * Note: this may not be perfect, AP might misbehave - if * anyone needs to rely on perfect complete notification * with the exact right subtype, then we need to track what * we actually transmitted. */ info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : IEEE80211_STYPE_ASSOC_REQ; if (assoc_data->fils_kek_len && fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) return; elem_len = len - (elem_start - (u8 *)mgmt); parse_params.start = elem_start; parse_params.len = elem_len; elems = ieee802_11_parse_elems_full(&parse_params); if (!elems) goto notify_driver; if (elems->aid_resp) aid = le16_to_cpu(elems->aid_resp->aid); else if (assoc_data->s1g) aid = 0; /* TODO */ else aid = le16_to_cpu(mgmt->u.assoc_resp.aid); /* * The 5 MSB of the AID field are reserved * (802.11-2016 9.4.1.8 AID field) */ aid &= 0x7ff; sdata_info(sdata, "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", reassoc ? "Rea" : "A", assoc_data->ap_addr, capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); ifmgd->broken_ap = false; if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && elems->timeout_int && elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { u32 tu, ms; cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, le32_to_cpu(elems->timeout_int->value)); tu = le32_to_cpu(elems->timeout_int->value); ms = tu * 1024 / 1000; sdata_info(sdata, "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", assoc_data->ap_addr, tu, ms); assoc_data->timeout = jiffies + msecs_to_jiffies(ms); assoc_data->timeout_started = true; assoc_data->comeback = true; if (ms > IEEE80211_ASSOC_TIMEOUT) run_again(sdata, assoc_data->timeout); goto notify_driver; } if (status_code != WLAN_STATUS_SUCCESS) { sdata_info(sdata, "%pM denied association (code=%d)\n", assoc_data->ap_addr, status_code); event.u.mlme.status = MLME_DENIED; event.u.mlme.reason = status_code; drv_event_callback(sdata->local, sdata, &event); } else { if (aid == 0 || aid > IEEE80211_MAX_AID) { sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", aid); aid = 0; ifmgd->broken_ap = true; } if (ieee80211_vif_is_mld(&sdata->vif)) { struct ieee80211_mle_basic_common_info *common; if (!elems->ml_basic) { sdata_info(sdata, "MLO association with %pM but no (basic) multi-link element in response!\n", assoc_data->ap_addr); goto abandon_assoc; } common = (void *)elems->ml_basic->variable; if (memcmp(assoc_data->ap_addr, common->mld_mac_addr, ETH_ALEN)) { sdata_info(sdata, "AP MLD MAC address mismatch: got %pM expected %pM\n", common->mld_mac_addr, assoc_data->ap_addr); goto abandon_assoc; } } sdata->vif.cfg.aid = aid; if (!ieee80211_assoc_success(sdata, mgmt, elems, elem_start, elem_len)) { /* oops -- internal error -- send timeout for now */ ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); goto notify_driver; } event.u.mlme.status = MLME_SUCCESS; drv_event_callback(sdata->local, sdata, &event); sdata_info(sdata, "associated\n"); info.success = 1; } for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { struct ieee80211_link_data *link; if (!assoc_data->link[link_id].bss) continue; resp.links[link_id].bss = assoc_data->link[link_id].bss; ether_addr_copy(resp.links[link_id].addr, assoc_data->link[link_id].addr); resp.links[link_id].status = assoc_data->link[link_id].status; link = sdata_dereference(sdata->link[link_id], sdata); if (!link) continue; /* get uapsd queues configuration - same for all links */ resp.uapsd_queues = 0; for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) if (link->tx_conf[ac].uapsd) resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; } if (ieee80211_vif_is_mld(&sdata->vif)) { ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); resp.ap_mld_addr = ap_mld_addr; } ieee80211_destroy_assoc_data(sdata, status_code == WLAN_STATUS_SUCCESS ? ASSOC_SUCCESS : ASSOC_REJECTED); resp.buf = (u8 *)mgmt; resp.len = len; resp.req_ies = ifmgd->assoc_req_ies; resp.req_ies_len = ifmgd->assoc_req_ies_len; cfg80211_rx_assoc_resp(sdata->dev, &resp); notify_driver: drv_mgd_complete_tx(sdata->local, sdata, &info); kfree(elems); return; abandon_assoc: ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); goto notify_driver; } static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, struct ieee80211_mgmt *mgmt, size_t len, struct ieee80211_rx_status *rx_status) { struct ieee80211_sub_if_data *sdata = link->sdata; struct ieee80211_local *local = sdata->local; struct ieee80211_bss *bss; struct ieee80211_channel *channel; lockdep_assert_wiphy(sdata->local->hw.wiphy); channel = ieee80211_get_channel_khz(local->hw.wiphy, ieee80211_rx_status_to_khz(rx_status)); if (!channel) return; bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); if (bss) { link->conf->beacon_rate = bss->beacon_rate; ieee80211_rx_bss_put(local, bss); } } static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, struct sk_buff *skb) { struct ieee80211_sub_if_data *sdata = link->sdata; struct ieee80211_mgmt *mgmt = (void *)skb->data; struct ieee80211_if_managed *ifmgd; struct ieee80211_rx_status *rx_status = (void *) skb->cb; struct ieee80211_channel *channel; size_t baselen, len = skb->len; ifmgd = &sdata->u.mgd; lockdep_assert_wiphy(sdata->local->hw.wiphy); /* * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: * "If a 6 GHz AP receives a Probe Request frame and responds with * a Probe Response frame [..], the Address 1 field of the Probe * Response frame shall be set to the broadcast address [..]" * So, on 6GHz band we should also accept broadcast responses. */ channel = ieee80211_get_channel(sdata->local->hw.wiphy, rx_status->freq); if (!channel) return; if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && (channel->band != NL80211_BAND_6GHZ || !is_broadcast_ether_addr(mgmt->da))) return; /* ignore ProbeResp to foreign address */ baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; if (baselen > len) return; ieee80211_rx_bss_info(link, mgmt, len, rx_status); if (ifmgd->associated && ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) ieee80211_reset_ap_probe(sdata); } /* * This is the canonical list of information elements we care about, * the filter code also gives us all changes to the Microsoft OUI * (00:50:F2) vendor IE which is used for WMM which we need to track, * as well as the DTPC IE (part of the Cisco OUI) used for signaling * changes to requested client power. * * We implement beacon filtering in software since that means we can * avoid processing the frame here and in cfg80211, and userspace * will not be able to tell whether the hardware supports it or not. * * XXX: This list needs to be dynamic -- userspace needs to be able to * add items it requires. It also needs to be able to tell us to * look out for other vendor IEs. */ static const u64 care_about_ies = (1ULL << WLAN_EID_COUNTRY) | (1ULL << WLAN_EID_ERP_INFO) | (1ULL << WLAN_EID_CHANNEL_SWITCH) | (1ULL << WLAN_EID_PWR_CONSTRAINT) | (1ULL << WLAN_EID_HT_CAPABILITY) | (1ULL << WLAN_EID_HT_OPERATION) | (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, struct ieee80211_if_managed *ifmgd, struct ieee80211_bss_conf *bss_conf, struct ieee80211_local *local, struct ieee80211_rx_status *rx_status) { struct ieee80211_sub_if_data *sdata = link->sdata; /* Track average RSSI from the Beacon frames of the current AP */ if (!link->u.mgd.tracking_signal_avg) { link->u.mgd.tracking_signal_avg = true; ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); link->u.mgd.last_cqm_event_signal = 0; link->u.mgd.count_beacon_signal = 1; link->u.mgd.last_ave_beacon_signal = 0; } else { link->u.mgd.count_beacon_signal++; } ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, -rx_status->signal); if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); int last_sig = link->u.mgd.last_ave_beacon_signal; struct ieee80211_event event = { .type = RSSI_EVENT, }; /* * if signal crosses either of the boundaries, invoke callback * with appropriate parameters */ if (sig > ifmgd->rssi_max_thold && (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { link->u.mgd.last_ave_beacon_signal = sig; event.u.rssi.data = RSSI_EVENT_HIGH; drv_event_callback(local, sdata, &event); } else if (sig < ifmgd->rssi_min_thold && (last_sig >= ifmgd->rssi_max_thold || last_sig == 0)) { link->u.mgd.last_ave_beacon_signal = sig; event.u.rssi.data = RSSI_EVENT_LOW; drv_event_callback(local, sdata, &event); } } if (bss_conf->cqm_rssi_thold && link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); int last_event = link->u.mgd.last_cqm_event_signal; int thold = bss_conf->cqm_rssi_thold; int hyst = bss_conf->cqm_rssi_hyst; if (sig < thold && (last_event == 0 || sig < last_event - hyst)) { link->u.mgd.last_cqm_event_signal = sig; ieee80211_cqm_rssi_notify( &sdata->vif, NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, sig, GFP_KERNEL); } else if (sig > thold && (last_event == 0 || sig > last_event + hyst)) { link->u.mgd.last_cqm_event_signal = sig; ieee80211_cqm_rssi_notify( &sdata->vif, NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, sig, GFP_KERNEL); } } if (bss_conf->cqm_rssi_low && link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); int last_event = link->u.mgd.last_cqm_event_signal; int low = bss_conf->cqm_rssi_low; int high = bss_conf->cqm_rssi_high; if (sig < low && (last_event == 0 || last_event >= low)) { link->u.mgd.last_cqm_event_signal = sig; ieee80211_cqm_rssi_notify( &sdata->vif, NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, sig, GFP_KERNEL); } else if (sig > high && (last_event == 0 || last_event <= high)) { link->u.mgd.last_cqm_event_signal = sig; ieee80211_cqm_rssi_notify( &sdata->vif, NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, sig, GFP_KERNEL); } } } static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, struct cfg80211_bss *bss) { if (ether_addr_equal(tx_bssid, bss->bssid)) return true; if (!bss->transmitted_bss) return false; return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); } static bool ieee80211_config_puncturing(struct ieee80211_link_data *link, const struct ieee80211_eht_operation *eht_oper, u64 *changed) { struct ieee80211_local *local = link->sdata->local; u16 bitmap = 0, extracted; if ((eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && (eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { const struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional; const u8 *disable_subchannel_bitmap = info->optional; bitmap = get_unaligned_le16(disable_subchannel_bitmap); } extracted = ieee80211_extract_dis_subch_bmap(eht_oper, &link->conf->chandef, bitmap); /* accept if there are no changes */ if (!(*changed & BSS_CHANGED_BANDWIDTH) && extracted == link->conf->eht_puncturing) return true; if (!cfg80211_valid_disable_subchannel_bitmap(&bitmap, &link->conf->chandef)) { link_info(link, "Got an invalid disable subchannel bitmap from AP %pM: bitmap = 0x%x, bw = 0x%x. disconnect\n", link->u.mgd.bssid, bitmap, link->conf->chandef.width); return false; } if (bitmap && ieee80211_hw_check(&local->hw, DISALLOW_PUNCTURING)) return false; ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, changed); return true; } static void ieee80211_ml_reconf_work(struct wiphy *wiphy, struct wiphy_work *work) { struct ieee80211_sub_if_data *sdata = container_of(work, struct ieee80211_sub_if_data, u.mgd.ml_reconf_work.work); u16 new_valid_links, new_active_links, new_dormant_links; int ret; if (!sdata->u.mgd.removed_links) return; sdata_info(sdata, "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", sdata->vif.valid_links, sdata->u.mgd.removed_links); new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; if (new_valid_links == sdata->vif.valid_links) return; if (!new_valid_links || !(new_valid_links & ~sdata->vif.dormant_links)) { sdata_info(sdata, "No valid links after reconfiguration\n"); ret = -EINVAL; goto out; } new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; if (new_active_links != sdata->vif.active_links) { if (!new_active_links) new_active_links = BIT(ffs(new_valid_links & ~sdata->vif.dormant_links) - 1); ret = ieee80211_set_active_links(&sdata->vif, new_active_links); if (ret) { sdata_info(sdata, "Failed setting active links\n"); goto out; } } new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; ret = ieee80211_vif_set_links(sdata, new_valid_links, new_dormant_links); if (ret) sdata_info(sdata, "Failed setting valid links\n"); ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); out: if (!ret) cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); else __ieee80211_disconnect(sdata); sdata->u.mgd.removed_links = 0; } static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, struct ieee802_11_elems *elems) { const struct ieee80211_multi_link_elem *ml; const struct element *sub; ssize_t ml_len; unsigned long removed_links = 0; u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; u8 link_id; u32 delay; if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) return; ml_len = cfg80211_defragment_element(elems->ml_reconf_elem, elems->ie_start, elems->total_len, elems->scratch_pos, elems->scratch + elems->scratch_len - elems->scratch_pos, WLAN_EID_FRAGMENT); if (ml_len < 0) return; elems->ml_reconf = (const void *)elems->scratch_pos; elems->ml_reconf_len = ml_len; ml = elems->ml_reconf; /* Directly parse the sub elements as the common information doesn't * hold any useful information. */ for_each_mle_subelement(sub, (u8 *)ml, ml_len) { struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; u8 *pos = prof->variable; u16 control; if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) continue; if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, sub->datalen)) return; control = le16_to_cpu(prof->control); link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; removed_links |= BIT(link_id); /* the MAC address should not be included, but handle it */ if (control & IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) pos += 6; /* According to Draft P802.11be_D3.0, the control should * include the AP Removal Timer present. If the AP Removal Timer * is not present assume immediate removal. */ if (control & IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) link_removal_timeout[link_id] = le16_to_cpu(*(__le16 *)pos); } removed_links &= sdata->vif.valid_links; if (!removed_links) { /* In case the removal was cancelled, abort it */ if (sdata->u.mgd.removed_links) { sdata->u.mgd.removed_links = 0; wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &sdata->u.mgd.ml_reconf_work); } return; } delay = 0; for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { struct ieee80211_bss_conf *link_conf = sdata_dereference(sdata->vif.link_conf[link_id], sdata); u32 link_delay; if (!link_conf) { removed_links &= ~BIT(link_id); continue; } link_delay = link_conf->beacon_int * link_removal_timeout[link_id]; if (!delay) delay = link_delay; else delay = min(delay, link_delay); } sdata->u.mgd.removed_links = removed_links; wiphy_delayed_work_queue(sdata->local->hw.wiphy, &sdata->u.mgd.ml_reconf_work, TU_TO_JIFFIES(delay)); } static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, struct wiphy_work *work) { u16 new_active_links, new_dormant_links; struct ieee80211_sub_if_data *sdata = container_of(work, struct ieee80211_sub_if_data, u.mgd.ttlm_work.work); int ret; new_active_links = sdata->u.mgd.ttlm_info.map & sdata->vif.valid_links; new_dormant_links = ~sdata->u.mgd.ttlm_info.map & sdata->vif.valid_links; if (!new_active_links) { ieee80211_disconnect(&sdata->vif, false); return; } ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); new_active_links = BIT(ffs(new_active_links) - 1); ieee80211_set_active_links(&sdata->vif, new_active_links); ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, new_dormant_links); sdata->u.mgd.ttlm_info.active = true; sdata->u.mgd.ttlm_info.switch_time = 0; if (!ret) ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); } static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) { if (bm_size == 1) return *data; else return get_unaligned_le16(data); } static int ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, const struct ieee80211_ttlm_elem *ttlm, struct ieee80211_adv_ttlm_info *ttlm_info) { /* The element size was already validated in * ieee80211_tid_to_link_map_size_ok() */ u8 control, link_map_presence, map_size, tid; u8 *pos; memset(ttlm_info, 0, sizeof(*ttlm_info)); pos = (void *)ttlm->optional; control = ttlm->control; if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) return 0; if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != IEEE80211_TTLM_DIRECTION_BOTH) { sdata_info(sdata, "Invalid advertised T2L map direction\n"); return -EINVAL; } link_map_presence = *pos; pos++; ttlm_info->switch_time = get_unaligned_le16(pos); /* Since ttlm_info->switch_time == 0 means no switch time, bump it * by 1. */ if (!ttlm_info->switch_time) ttlm_info->switch_time = 1; pos += 2; if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; pos += 3; } if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) map_size = 1; else map_size = 2; /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall * not advertise a TID-to-link mapping that does not map all TIDs to the * same link set, reject frame if not all links have mapping */ if (link_map_presence != 0xff) { sdata_info(sdata, "Invalid advertised T2L mapping presence indicator\n"); return -EINVAL; } ttlm_info->map = ieee80211_get_ttlm(map_size, pos); if (!ttlm_info->map) { sdata_info(sdata, "Invalid advertised T2L map for TID 0\n"); return -EINVAL; } pos += map_size; for (tid = 1; tid < 8; tid++) { u16 map = ieee80211_get_ttlm(map_size, pos); if (map != ttlm_info->map) { sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", tid); return -EINVAL; } pos += map_size; } return 0; } static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, struct ieee802_11_elems *elems, u64 beacon_ts) { u8 i; int ret; if (!ieee80211_vif_is_mld(&sdata->vif)) return; if (!elems->ttlm_num) { if (sdata->u.mgd.ttlm_info.switch_time) { /* if a planned TID-to-link mapping was cancelled - * abort it */ wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &sdata->u.mgd.ttlm_work); } else if (sdata->u.mgd.ttlm_info.active) { /* if no TID-to-link element, set to default mapping in * which all TIDs are mapped to all setup links */ ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); if (ret) { sdata_info(sdata, "Failed setting valid/dormant links\n"); return; } ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); } memset(&sdata->u.mgd.ttlm_info, 0, sizeof(sdata->u.mgd.ttlm_info)); return; } for (i = 0; i < elems->ttlm_num; i++) { struct ieee80211_adv_ttlm_info ttlm_info; u32 res; res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], &ttlm_info); if (res) { __ieee80211_disconnect(sdata); return; } if (ttlm_info.switch_time) { u16 beacon_ts_tu, st_tu, delay; u32 delay_jiffies; u64 mask; /* The t2l map switch time is indicated with a partial * TSF value (bits 10 to 25), get the partial beacon TS * as well, and calc the delay to the start time. */ mask = GENMASK_ULL(25, 10); beacon_ts_tu = (beacon_ts & mask) >> 10; st_tu = ttlm_info.switch_time; delay = st_tu - beacon_ts_tu; /* * If the switch time is far in the future, then it * could also be the previous switch still being * announced. * We can simply ignore it for now, if it is a future * switch the AP will continue to announce it anyway. */ if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) return; delay_jiffies = TU_TO_JIFFIES(delay); /* Link switching can take time, so schedule it * 100ms before to be ready on time */ if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) delay_jiffies -= IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; else delay_jiffies = 0; sdata->u.mgd.ttlm_info = ttlm_info; wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &sdata->u.mgd.ttlm_work); wiphy_delayed_work_queue(sdata->local->hw.wiphy, &sdata->u.mgd.ttlm_work, delay_jiffies); return; } } } static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, struct ieee80211_hdr *hdr, size_t len, struct ieee80211_rx_status *rx_status) { struct ieee80211_sub_if_data *sdata = link->sdata; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; struct ieee80211_mgmt *mgmt = (void *) hdr; size_t baselen; struct ieee802_11_elems *elems; struct ieee80211_local *local = sdata->local; struct ieee80211_chanctx_conf *chanctx_conf; struct ieee80211_supported_band *sband; struct ieee80211_channel *chan; struct link_sta_info *link_sta; struct sta_info *sta; u64 changed = 0; bool erp_valid; u8 erp_value = 0; u32 ncrc = 0; u8 *bssid, *variable = mgmt->u.beacon.variable; u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; struct ieee80211_elems_parse_params parse_params = { .link_id = -1, .from_ap = true, }; lockdep_assert_wiphy(local->hw.wiphy); /* Process beacon from the current BSS */ bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { struct ieee80211_ext *ext = (void *) mgmt; if (ieee80211_is_s1g_short_beacon(ext->frame_control)) variable = ext->u.s1g_short_beacon.variable; else variable = ext->u.s1g_beacon.variable; } baselen = (u8 *) variable - (u8 *) mgmt; if (baselen > len) return; parse_params.start = variable; parse_params.len = len - baselen; rcu_read_lock(); chanctx_conf = rcu_dereference(link->conf->chanctx_conf); if (!chanctx_conf) { rcu_read_unlock(); return; } if (ieee80211_rx_status_to_khz(rx_status) != ieee80211_channel_to_khz(chanctx_conf->def.chan)) { rcu_read_unlock(); return; } chan = chanctx_conf->def.chan; rcu_read_unlock(); if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { parse_params.bss = ifmgd->assoc_data->link[0].bss; elems = ieee802_11_parse_elems_full(&parse_params); if (!elems) return; ieee80211_rx_bss_info(link, mgmt, len, rx_status); if (elems->dtim_period) link->u.mgd.dtim_period = elems->dtim_period; link->u.mgd.have_beacon = true; ifmgd->assoc_data->need_beacon = false; if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { link->conf->sync_tsf = le64_to_cpu(mgmt->u.beacon.timestamp); link->conf->sync_device_ts = rx_status->device_timestamp; link->conf->sync_dtim_count = elems->dtim_count; } if (elems->mbssid_config_ie) bss_conf->profile_periodicity = elems->mbssid_config_ie->profile_periodicity; else bss_conf->profile_periodicity = 0; if (elems->ext_capab_len >= 11 && (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) bss_conf->ema_ap = true; else bss_conf->ema_ap = false; /* continue assoc process */ ifmgd->assoc_data->timeout = jiffies; ifmgd->assoc_data->timeout_started = true; run_again(sdata, ifmgd->assoc_data->timeout); kfree(elems); return; } if (!ifmgd->associated || !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) return; bssid = link->u.mgd.bssid; if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, local, rx_status); if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { mlme_dbg_ratelimited(sdata, "cancelling AP probe due to a received beacon\n"); ieee80211_reset_ap_probe(sdata); } /* * Push the beacon loss detection into the future since * we are processing a beacon from the AP just now. */ ieee80211_sta_reset_beacon_monitor(sdata); /* TODO: CRC urrently not calculated on S1G Beacon Compatibility * element (which carries the beacon interval). Don't forget to add a * bit to care_about_ies[] above if mac80211 is interested in a * changing S1G element. */ if (!ieee80211_is_s1g_beacon(hdr->frame_control)) ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); parse_params.bss = link->u.mgd.bss; parse_params.filter = care_about_ies; parse_params.crc = ncrc; elems = ieee802_11_parse_elems_full(&parse_params); if (!elems) return; ncrc = elems->crc; if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { if (local->hw.conf.dynamic_ps_timeout > 0) { if (local->hw.conf.flags & IEEE80211_CONF_PS) { local->hw.conf.flags &= ~IEEE80211_CONF_PS; ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); } ieee80211_send_nullfunc(local, sdata, false); } else if (!local->pspolling && sdata->u.mgd.powersave) { local->pspolling = true; /* * Here is assumed that the driver will be * able to send ps-poll frame and receive a * response even though power save mode is * enabled, but some drivers might require * to disable power save here. This needs * to be investigated. */ ieee80211_send_pspoll(local, sdata); } } if (sdata->vif.p2p || sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { struct ieee80211_p2p_noa_attr noa = {}; int ret; ret = cfg80211_get_p2p_attr(variable, len - baselen, IEEE80211_P2P_ATTR_ABSENCE_NOTICE, (u8 *) &noa, sizeof(noa)); if (ret >= 2) { if (link->u.mgd.p2p_noa_index != noa.index) { /* valid noa_attr and index changed */ link->u.mgd.p2p_noa_index = noa.index; memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); changed |= BSS_CHANGED_P2P_PS; /* * make sure we update all information, the CRC * mechanism doesn't look at P2P attributes. */ link->u.mgd.beacon_crc_valid = false; } } else if (link->u.mgd.p2p_noa_index != -1) { /* noa_attr not found and we had valid noa_attr before */ link->u.mgd.p2p_noa_index = -1; memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); changed |= BSS_CHANGED_P2P_PS; link->u.mgd.beacon_crc_valid = false; } } if (link->u.mgd.csa_waiting_bcn) ieee80211_chswitch_post_beacon(link); /* * Update beacon timing and dtim count on every beacon appearance. This * will allow the driver to use the most updated values. Do it before * comparing this one with last received beacon. * IMPORTANT: These parameters would possibly be out of sync by the time * the driver will use them. The synchronized view is currently * guaranteed only in certain callbacks. */ if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && !ieee80211_is_s1g_beacon(hdr->frame_control)) { link->conf->sync_tsf = le64_to_cpu(mgmt->u.beacon.timestamp); link->conf->sync_device_ts = rx_status->device_timestamp; link->conf->sync_dtim_count = elems->dtim_count; } if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || ieee80211_is_s1g_short_beacon(mgmt->frame_control)) goto free; link->u.mgd.beacon_crc = ncrc; link->u.mgd.beacon_crc_valid = true; ieee80211_rx_bss_info(link, mgmt, len, rx_status); ieee80211_sta_process_chanswitch(link, rx_status->mactime, rx_status->device_timestamp, elems, true); if (!link->u.mgd.disable_wmm_tracking && ieee80211_sta_wmm_params(local, link, elems->wmm_param, elems->wmm_param_len, elems->mu_edca_param_set)) changed |= BSS_CHANGED_QOS; /* * If we haven't had a beacon before, tell the driver about the * DTIM period (and beacon timing if desired) now. */ if (!link->u.mgd.have_beacon) { /* a few bogus AP send dtim_period = 0 or no TIM IE */ bss_conf->dtim_period = elems->dtim_period ?: 1; changed |= BSS_CHANGED_BEACON_INFO; link->u.mgd.have_beacon = true; ieee80211_recalc_ps(local); ieee80211_recalc_ps_vif(sdata); } if (elems->erp_info) { erp_valid = true; erp_value = elems->erp_info[0]; } else { erp_valid = false; } if (!ieee80211_is_s1g_beacon(hdr->frame_control)) changed |= ieee80211_handle_bss_capability(link, le16_to_cpu(mgmt->u.beacon.capab_info), erp_valid, erp_value); sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); if (WARN_ON(!sta)) { goto free; } link_sta = rcu_dereference_protected(sta->link[link->link_id], lockdep_is_held(&local->hw.wiphy->mtx)); if (WARN_ON(!link_sta)) { goto free; } if (WARN_ON(!link->conf->chandef.chan)) goto free; sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); if (ieee80211_config_bw(link, elems->ht_cap_elem, elems->vht_cap_elem, elems->ht_operation, elems->vht_operation, elems->he_operation, elems->eht_operation, elems->s1g_oper, bssid, &changed)) { sdata_info(sdata, "failed to follow AP %pM bandwidth change, disconnect\n", bssid); ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, WLAN_REASON_DEAUTH_LEAVING, true, deauth_buf); ieee80211_report_disconnect(sdata, deauth_buf, sizeof(deauth_buf), true, WLAN_REASON_DEAUTH_LEAVING, false); goto free; } if (elems->opmode_notif) ieee80211_vht_handle_opmode(sdata, link_sta, *elems->opmode_notif, rx_status->band); changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, elems->country_elem, elems->country_elem_len, elems->pwr_constr_elem, elems->cisco_dtpc_elem); if (elems->eht_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { if (!ieee80211_config_puncturing(link, elems->eht_operation, &changed)) { ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, WLAN_REASON_DEAUTH_LEAVING, true, deauth_buf); ieee80211_report_disconnect(sdata, deauth_buf, sizeof(deauth_buf), true, WLAN_REASON_DEAUTH_LEAVING, false); goto free; } } ieee80211_ml_reconfiguration(sdata, elems); ieee80211_process_adv_ttlm(sdata, elems, le64_to_cpu(mgmt->u.beacon.timestamp)); ieee80211_link_info_change_notify(sdata, link, changed); free: kfree(elems); } void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) { struct ieee80211_link_data *link = &sdata->deflink; struct ieee80211_rx_status *rx_status; struct ieee80211_hdr *hdr; u16 fc; lockdep_assert_wiphy(sdata->local->hw.wiphy); rx_status = (struct ieee80211_rx_status *) skb->cb; hdr = (struct ieee80211_hdr *) skb->data; fc = le16_to_cpu(hdr->frame_control); switch (fc & IEEE80211_FCTL_STYPE) { case IEEE80211_STYPE_S1G_BEACON: ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); break; } } void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) { struct ieee80211_link_data *link = &sdata->deflink; struct ieee80211_rx_status *rx_status; struct ieee80211_mgmt *mgmt; u16 fc; int ies_len; lockdep_assert_wiphy(sdata->local->hw.wiphy); rx_status = (struct ieee80211_rx_status *) skb->cb; mgmt = (struct ieee80211_mgmt *) skb->data; fc = le16_to_cpu(mgmt->frame_control); if (rx_status->link_valid) { link = sdata_dereference(sdata->link[rx_status->link_id], sdata); if (!link) return; } switch (fc & IEEE80211_FCTL_STYPE) { case IEEE80211_STYPE_BEACON: ieee80211_rx_mgmt_beacon(link, (void *)mgmt, skb->len, rx_status); break; case IEEE80211_STYPE_PROBE_RESP: ieee80211_rx_mgmt_probe_resp(link, skb); break; case IEEE80211_STYPE_AUTH: ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); break; case IEEE80211_STYPE_DEAUTH: ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); break; case IEEE80211_STYPE_DISASSOC: ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); break; case IEEE80211_STYPE_ASSOC_RESP: case IEEE80211_STYPE_REASSOC_RESP: ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); break; case IEEE80211_STYPE_ACTION: if (!sdata->u.mgd.associated || !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) break; if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { struct ieee802_11_elems *elems; ies_len = skb->len - offsetof(struct ieee80211_mgmt, u.action.u.chan_switch.variable); if (ies_len < 0) break; /* CSA IE cannot be overridden, no need for BSSID */ elems = ieee802_11_parse_elems( mgmt->u.action.u.chan_switch.variable, ies_len, true, NULL); if (elems && !elems->parse_error) ieee80211_sta_process_chanswitch(link, rx_status->mactime, rx_status->device_timestamp, elems, false); kfree(elems); } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { struct ieee802_11_elems *elems; ies_len = skb->len - offsetof(struct ieee80211_mgmt, u.action.u.ext_chan_switch.variable); if (ies_len < 0) break; /* * extended CSA IE can't be overridden, no need for * BSSID */ elems = ieee802_11_parse_elems( mgmt->u.action.u.ext_chan_switch.variable, ies_len, true, NULL); if (elems && !elems->parse_error) { /* for the handling code pretend it was an IE */ elems->ext_chansw_ie = &mgmt->u.action.u.ext_chan_switch.data; ieee80211_sta_process_chanswitch(link, rx_status->mactime, rx_status->device_timestamp, elems, false); } kfree(elems); } break; } } static void ieee80211_sta_timer(struct timer_list *t) { struct ieee80211_sub_if_data *sdata = from_timer(sdata, t, u.mgd.timer); wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); } void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, u8 reason, bool tx) { u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, tx, frame_buf); ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, reason, false); } static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) { struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; u32 tx_flags = 0; u16 trans = 1; u16 status = 0; struct ieee80211_prep_tx_info info = { .subtype = IEEE80211_STYPE_AUTH, }; lockdep_assert_wiphy(sdata->local->hw.wiphy); if (WARN_ON_ONCE(!auth_data)) return -EINVAL; auth_data->tries++; if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { sdata_info(sdata, "authentication with %pM timed out\n", auth_data->ap_addr); /* * Most likely AP is not in the range so remove the * bss struct for that AP. */ cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); return -ETIMEDOUT; } if (auth_data->algorithm == WLAN_AUTH_SAE) info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); info.link_id = auth_data->link_id; drv_mgd_prepare_tx(local, sdata, &info); sdata_info(sdata, "send auth to %pM (try %d/%d)\n", auth_data->ap_addr, auth_data->tries, IEEE80211_AUTH_MAX_TRIES); auth_data->expected_transaction = 2; if (auth_data->algorithm == WLAN_AUTH_SAE) { trans = auth_data->sae_trans; status = auth_data->sae_status; auth_data->expected_transaction = trans; } if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | IEEE80211_TX_INTFL_MLME_CONN_TX; ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, auth_data->data, auth_data->data_len, auth_data->ap_addr, auth_data->ap_addr, NULL, 0, 0, tx_flags); if (tx_flags == 0) { if (auth_data->algorithm == WLAN_AUTH_SAE) auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT_SAE; else auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; } else { auth_data->timeout = round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); } auth_data->timeout_started = true; run_again(sdata, auth_data->timeout); return 0; } static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) { struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; struct ieee80211_local *local = sdata->local; int ret; lockdep_assert_wiphy(sdata->local->hw.wiphy); assoc_data->tries++; if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { sdata_info(sdata, "association with %pM timed out\n", assoc_data->ap_addr); /* * Most likely AP is not in the range so remove the * bss struct for that AP. */ cfg80211_unlink_bss(local->hw.wiphy, assoc_data->link[assoc_data->assoc_link_id].bss); return -ETIMEDOUT; } sdata_info(sdata, "associate with %pM (try %d/%d)\n", assoc_data->ap_addr, assoc_data->tries, IEEE80211_ASSOC_MAX_TRIES); ret = ieee80211_send_assoc(sdata); if (ret) return ret; if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; assoc_data->timeout_started = true; run_again(sdata, assoc_data->timeout); } else { assoc_data->timeout = round_jiffies_up(jiffies + IEEE80211_ASSOC_TIMEOUT_LONG); assoc_data->timeout_started = true; run_again(sdata, assoc_data->timeout); } return 0; } void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, __le16 fc, bool acked) { struct ieee80211_local *local = sdata->local; sdata->u.mgd.status_fc = fc; sdata->u.mgd.status_acked = acked; sdata->u.mgd.status_received = true; wiphy_work_queue(local->hw.wiphy, &sdata->work); } void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) { struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; lockdep_assert_wiphy(sdata->local->hw.wiphy); if (ifmgd->status_received) { __le16 fc = ifmgd->status_fc; bool status_acked = ifmgd->status_acked; ifmgd->status_received = false; if (ifmgd->auth_data && ieee80211_is_auth(fc)) { if (status_acked) { if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE) ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT_SAE; else ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; run_again(sdata, ifmgd->auth_data->timeout); } else { ifmgd->auth_data->timeout = jiffies - 1; } ifmgd->auth_data->timeout_started = true; } else if (ifmgd->assoc_data && !ifmgd->assoc_data->comeback && (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))) { /* * Update association timeout based on the TX status * for the (Re)Association Request frame. Skip this if * we have already processed a (Re)Association Response * frame that indicated need for association comeback * at a specific time in the future. This could happen * if the TX status information is delayed enough for * the response to be received and processed first. */ if (status_acked) { ifmgd->assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; run_again(sdata, ifmgd->assoc_data->timeout); } else { ifmgd->assoc_data->timeout = jiffies - 1; } ifmgd->assoc_data->timeout_started = true; } } if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && time_after(jiffies, ifmgd->auth_data->timeout)) { if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { /* * ok ... we waited for assoc or continuation but * userspace didn't do it, so kill the auth data */ ieee80211_destroy_auth_data(sdata, false); } else if (ieee80211_auth(sdata)) { u8 ap_addr[ETH_ALEN]; struct ieee80211_event event = { .type = MLME_EVENT, .u.mlme.data = AUTH_EVENT, .u.mlme.status = MLME_TIMEOUT, }; memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); ieee80211_destroy_auth_data(sdata, false); cfg80211_auth_timeout(sdata->dev, ap_addr); drv_event_callback(sdata->local, sdata, &event); } } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) run_again(sdata, ifmgd->auth_data->timeout); if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && time_after(jiffies, ifmgd->assoc_data->timeout)) { if ((ifmgd->assoc_data->need_beacon && !sdata->deflink.u.mgd.have_beacon) || ieee80211_do_assoc(sdata)) { struct ieee80211_event event = { .type = MLME_EVENT, .u.mlme.data = ASSOC_EVENT, .u.mlme.status = MLME_TIMEOUT, }; ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); drv_event_callback(sdata->local, sdata, &event); } } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) run_again(sdata, ifmgd->assoc_data->timeout); if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && ifmgd->associated) { u8 *bssid = sdata->deflink.u.mgd.bssid; int max_tries; if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) max_tries = max_nullfunc_tries; else max_tries = max_probe_tries; /* ACK received for nullfunc probing frame */ if (!ifmgd->probe_send_count) ieee80211_reset_ap_probe(sdata); else if (ifmgd->nullfunc_failed) { if (ifmgd->probe_send_count < max_tries) { mlme_dbg(sdata, "No ack for nullfunc frame to AP %pM, try %d/%i\n", bssid, ifmgd->probe_send_count, max_tries); ieee80211_mgd_probe_ap_send(sdata); } else { mlme_dbg(sdata, "No ack for nullfunc frame to AP %pM, disconnecting.\n", bssid); ieee80211_sta_connection_lost(sdata, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); } } else if (time_is_after_jiffies(ifmgd->probe_timeout)) run_again(sdata, ifmgd->probe_timeout); else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { mlme_dbg(sdata, "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", bssid, probe_wait_ms); ieee80211_sta_connection_lost(sdata, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); } else if (ifmgd->probe_send_count < max_tries) { mlme_dbg(sdata, "No probe response from AP %pM after %dms, try %d/%i\n", bssid, probe_wait_ms, ifmgd->probe_send_count, max_tries); ieee80211_mgd_probe_ap_send(sdata); } else { /* * We actually lost the connection ... or did we? * Let's make sure! */ mlme_dbg(sdata, "No probe response from AP %pM after %dms, disconnecting.\n", bssid, probe_wait_ms); ieee80211_sta_connection_lost(sdata, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); } } } static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) { struct ieee80211_sub_if_data *sdata = from_timer(sdata, t, u.mgd.bcn_mon_timer); if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) return; if (sdata->vif.bss_conf.csa_active && !sdata->deflink.u.mgd.csa_waiting_bcn) return; if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) return; sdata->u.mgd.connection_loss = false; wiphy_work_queue(sdata->local->hw.wiphy, &sdata->u.mgd.beacon_connection_loss_work); } static void ieee80211_sta_conn_mon_timer(struct timer_list *t) { struct ieee80211_sub_if_data *sdata = from_timer(sdata, t, u.mgd.conn_mon_timer); struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_local *local = sdata->local; struct sta_info *sta; unsigned long timeout; if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) return; if (sdata->vif.bss_conf.csa_active && !sdata->deflink.u.mgd.csa_waiting_bcn) return; sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); if (!sta) return; timeout = sta->deflink.status_stats.last_ack; if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) timeout = sta->deflink.rx_stats.last_rx; timeout += IEEE80211_CONNECTION_IDLE_TIME; /* If timeout is after now, then update timer to fire at * the later date, but do not actually probe at this time. */ if (time_is_after_jiffies(timeout)) { mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); return; } wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); } static void ieee80211_sta_monitor_work(struct wiphy *wiphy, struct wiphy_work *work) { struct ieee80211_sub_if_data *sdata = container_of(work, struct ieee80211_sub_if_data, u.mgd.monitor_work); ieee80211_mgd_probe_ap(sdata, false); } static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) { if (sdata->vif.type == NL80211_IFTYPE_STATION) { __ieee80211_stop_poll(sdata); /* let's probe the connection once */ if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) wiphy_work_queue(sdata->local->hw.wiphy, &sdata->u.mgd.monitor_work); } } #ifdef CONFIG_PM void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; lockdep_assert_wiphy(sdata->local->hw.wiphy); if (ifmgd->auth_data || ifmgd->assoc_data) { const u8 *ap_addr = ifmgd->auth_data ? ifmgd->auth_data->ap_addr : ifmgd->assoc_data->ap_addr; /* * If we are trying to authenticate / associate while suspending, * cfg80211 won't know and won't actually abort those attempts, * thus we need to do that ourselves. */ ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, IEEE80211_STYPE_DEAUTH, WLAN_REASON_DEAUTH_LEAVING, false, frame_buf); if (ifmgd->assoc_data) ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); if (ifmgd->auth_data) ieee80211_destroy_auth_data(sdata, false); cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN, false); } /* This is a bit of a hack - we should find a better and more generic * solution to this. Normally when suspending, cfg80211 will in fact * deauthenticate. However, it doesn't (and cannot) stop an ongoing * auth (not so important) or assoc (this is the problem) process. * * As a consequence, it can happen that we are in the process of both * associating and suspending, and receive an association response * after cfg80211 has checked if it needs to disconnect, but before * we actually set the flag to drop incoming frames. This will then * cause the workqueue flush to process the association response in * the suspend, resulting in a successful association just before it * tries to remove the interface from the driver, which now though * has a channel context assigned ... this results in issues. * * To work around this (for now) simply deauth here again if we're * now connected. */ if (ifmgd->associated && !sdata->local->wowlan) { u8 bssid[ETH_ALEN]; struct cfg80211_deauth_request req = { .reason_code = WLAN_REASON_DEAUTH_LEAVING, .bssid = bssid, }; memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); ieee80211_mgd_deauth(sdata, &req); } } #endif void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; lockdep_assert_wiphy(sdata->local->hw.wiphy); if (!ifmgd->associated) return; if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; mlme_dbg(sdata, "driver requested disconnect after resume\n"); ieee80211_sta_connection_lost(sdata, WLAN_REASON_UNSPECIFIED, true); return; } if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); ieee80211_sta_connection_lost(sdata, WLAN_REASON_UNSPECIFIED, true); return; } } static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, struct wiphy_work *work) { struct ieee80211_link_data *link = container_of(work, struct ieee80211_link_data, u.mgd.request_smps_work); __ieee80211_request_smps_mgd(link->sdata, link, link->u.mgd.driver_smps_mode); } /* interface setup */ void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); wiphy_work_init(&ifmgd->beacon_connection_loss_work, ieee80211_beacon_connection_loss_work); wiphy_work_init(&ifmgd->csa_connection_drop_work, ieee80211_csa_connection_drop_work); wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, ieee80211_tdls_peer_del_work); wiphy_delayed_work_init(&ifmgd->ml_reconf_work, ieee80211_ml_reconf_work); timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, ieee80211_sta_handle_tspec_ac_params_wk); wiphy_delayed_work_init(&ifmgd->ttlm_work, ieee80211_tid_to_link_map_work); ifmgd->flags = 0; ifmgd->powersave = sdata->wdev.ps; ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; /* Setup TDLS data */ spin_lock_init(&ifmgd->teardown_lock); ifmgd->teardown_skb = NULL; ifmgd->orig_teardown_skb = NULL; } static void ieee80211_recalc_smps_work(struct wiphy *wiphy, struct wiphy_work *work) { struct ieee80211_link_data *link = container_of(work, struct ieee80211_link_data, u.mgd.recalc_smps); ieee80211_recalc_smps(link->sdata, link); } void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) { struct ieee80211_sub_if_data *sdata = link->sdata; struct ieee80211_local *local = sdata->local; unsigned int link_id = link->link_id; link->u.mgd.p2p_noa_index = -1; link->u.mgd.conn_flags = 0; link->conf->bssid = link->u.mgd.bssid; link->smps_mode = IEEE80211_SMPS_OFF; wiphy_work_init(&link->u.mgd.request_smps_work, ieee80211_request_smps_mgd_work); wiphy_work_init(&link->u.mgd.recalc_smps, ieee80211_recalc_smps_work); if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; else link->u.mgd.req_smps = IEEE80211_SMPS_OFF; wiphy_delayed_work_init(&link->u.mgd.chswitch_work, ieee80211_chswitch_work); if (sdata->u.mgd.assoc_data) ether_addr_copy(link->conf->addr, sdata->u.mgd.assoc_data->link[link_id].addr); else if (!is_valid_ether_addr(link->conf->addr)) eth_random_addr(link->conf->addr); } /* scan finished notification */ void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) { struct ieee80211_sub_if_data *sdata; /* Restart STA timers */ rcu_read_lock(); list_for_each_entry_rcu(sdata, &local->interfaces, list) { if (ieee80211_sdata_running(sdata)) ieee80211_restart_sta_timer(sdata); } rcu_read_unlock(); } static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, struct cfg80211_bss *cbss, s8 link_id, const u8 *ap_mld_addr, bool assoc, bool override) { struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_bss *bss = (void *)cbss->priv; struct sta_info *new_sta = NULL; struct ieee80211_link_data *link; bool have_sta = false; bool mlo; int err; if (link_id >= 0) { mlo = true; if (WARN_ON(!ap_mld_addr)) return -EINVAL; err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); } else { if (WARN_ON(ap_mld_addr)) return -EINVAL; ap_mld_addr = cbss->bssid; err = ieee80211_vif_set_links(sdata, 0, 0); link_id = 0; mlo = false; } if (err) return err; link = sdata_dereference(sdata->link[link_id], sdata); if (WARN_ON(!link)) { err = -ENOLINK; goto out_err; } if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { err = -EINVAL; goto out_err; } /* If a reconfig is happening, bail out */ if (local->in_reconfig) { err = -EBUSY; goto out_err; } if (assoc) { rcu_read_lock(); have_sta = sta_info_get(sdata, ap_mld_addr); rcu_read_unlock(); } if (!have_sta) { if (mlo) new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, link_id, cbss->bssid, GFP_KERNEL); else new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); if (!new_sta) { err = -ENOMEM; goto out_err; } new_sta->sta.mlo = mlo; } /* * Set up the information for the new channel before setting the * new channel. We can't - completely race-free - change the basic * rates bitmap and the channel (sband) that it refers to, but if * we set it up before we at least avoid calling into the driver's * bss_info_changed() method with invalid information (since we do * call that from changing the channel - only for IDLE and perhaps * some others, but ...). * * So to avoid that, just set up all the new information before the * channel, but tell the driver to apply it only afterwards, since * it might need the new channel for that. */ if (new_sta) { const struct cfg80211_bss_ies *ies; struct link_sta_info *link_sta; rcu_read_lock(); link_sta = rcu_dereference(new_sta->link[link_id]); if (WARN_ON(!link_sta)) { rcu_read_unlock(); sta_info_free(local, new_sta); err = -EINVAL; goto out_err; } err = ieee80211_mgd_setup_link_sta(link, new_sta, link_sta, cbss); if (err) { rcu_read_unlock(); sta_info_free(local, new_sta); goto out_err; } memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); /* set timing information */ link->conf->beacon_int = cbss->beacon_interval; ies = rcu_dereference(cbss->beacon_ies); if (ies) { link->conf->sync_tsf = ies->tsf; link->conf->sync_device_ts = bss->device_ts_beacon; ieee80211_get_dtim(ies, &link->conf->sync_dtim_count, NULL); } else if (!ieee80211_hw_check(&sdata->local->hw, TIMING_BEACON_ONLY)) { ies = rcu_dereference(cbss->proberesp_ies); /* must be non-NULL since beacon IEs were NULL */ link->conf->sync_tsf = ies->tsf; link->conf->sync_device_ts = bss->device_ts_presp; link->conf->sync_dtim_count = 0; } else { link->conf->sync_tsf = 0; link->conf->sync_device_ts = 0; link->conf->sync_dtim_count = 0; } rcu_read_unlock(); } if (new_sta || override) { err = ieee80211_prep_channel(sdata, link, cbss, mlo, &link->u.mgd.conn_flags); if (err) { if (new_sta) sta_info_free(local, new_sta); goto out_err; } } if (new_sta) { /* * tell driver about BSSID, basic rates and timing * this was set up above, before setting the channel */ ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | BSS_CHANGED_BEACON_INT); if (assoc) sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); err = sta_info_insert(new_sta); new_sta = NULL; if (err) { sdata_info(sdata, "failed to insert STA entry for the AP (error %d)\n", err); goto out_err; } } else WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); /* Cancel scan to ensure that nothing interferes with connection */ if (local->scanning) ieee80211_scan_cancel(local); return 0; out_err: ieee80211_link_release_channel(&sdata->deflink); ieee80211_vif_set_links(sdata, 0, 0); return err; } static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, const struct cfg80211_bss_ies *ies, u8 cur_channel, bool ignore_ecsa) { const struct element *csa_elem, *ecsa_elem; struct ieee80211_channel_sw_ie *csa = NULL; struct ieee80211_ext_chansw_ie *ecsa = NULL; if (!ies) return false; csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, ies->data, ies->len); if (csa_elem && csa_elem->datalen == sizeof(*csa)) csa = (void *)csa_elem->data; ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, ies->data, ies->len); if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) ecsa = (void *)ecsa_elem->data; if (csa && csa->count == 0) csa = NULL; if (csa && !csa->mode && csa->new_ch_num == cur_channel) csa = NULL; if (ecsa && ecsa->count == 0) ecsa = NULL; if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) ecsa = NULL; if (ignore_ecsa && ecsa) { sdata_info(sdata, "Ignoring ECSA in probe response - was considered stuck!\n"); return csa; } return csa || ecsa; } static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, struct cfg80211_bss *bss) { u8 cur_channel; bool ret; cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); rcu_read_lock(); if (ieee80211_mgd_csa_present(sdata, rcu_dereference(bss->beacon_ies), cur_channel, false)) { ret = true; goto out; } if (ieee80211_mgd_csa_present(sdata, rcu_dereference(bss->proberesp_ies), cur_channel, bss->proberesp_ecsa_stuck)) { ret = true; goto out; } ret = false; out: rcu_read_unlock(); return ret; } /* config hooks */ int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, struct cfg80211_auth_request *req) { struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_mgd_auth_data *auth_data; struct ieee80211_link_data *link; u16 auth_alg; int err; bool cont_auth; lockdep_assert_wiphy(sdata->local->hw.wiphy); /* prepare auth data structure */ switch (req->auth_type) { case NL80211_AUTHTYPE_OPEN_SYSTEM: auth_alg = WLAN_AUTH_OPEN; break; case NL80211_AUTHTYPE_SHARED_KEY: if (fips_enabled) return -EOPNOTSUPP; auth_alg = WLAN_AUTH_SHARED_KEY; break; case NL80211_AUTHTYPE_FT: auth_alg = WLAN_AUTH_FT; break; case NL80211_AUTHTYPE_NETWORK_EAP: auth_alg = WLAN_AUTH_LEAP; break; case NL80211_AUTHTYPE_SAE: auth_alg = WLAN_AUTH_SAE; break; case NL80211_AUTHTYPE_FILS_SK: auth_alg = WLAN_AUTH_FILS_SK; break; case NL80211_AUTHTYPE_FILS_SK_PFS: auth_alg = WLAN_AUTH_FILS_SK_PFS; break; case NL80211_AUTHTYPE_FILS_PK: auth_alg = WLAN_AUTH_FILS_PK; break; default: return -EOPNOTSUPP; } if (ifmgd->assoc_data) return -EBUSY; if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { sdata_info(sdata, "AP is in CSA process, reject auth\n"); return -EINVAL; } auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + req->ie_len, GFP_KERNEL); if (!auth_data) return -ENOMEM; memcpy(auth_data->ap_addr, req->ap_mld_addr ?: req->bss->bssid, ETH_ALEN); auth_data->bss = req->bss; auth_data->link_id = req->link_id; if (req->auth_data_len >= 4) { if (req->auth_type == NL80211_AUTHTYPE_SAE) { __le16 *pos = (__le16 *) req->auth_data; auth_data->sae_trans = le16_to_cpu(pos[0]); auth_data->sae_status = le16_to_cpu(pos[1]); } memcpy(auth_data->data, req->auth_data + 4, req->auth_data_len - 4); auth_data->data_len += req->auth_data_len - 4; } /* Check if continuing authentication or trying to authenticate with the * same BSS that we were in the process of authenticating with and avoid * removal and re-addition of the STA entry in * ieee80211_prep_connection(). */ cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && ifmgd->auth_data->link_id == req->link_id; if (req->ie && req->ie_len) { memcpy(&auth_data->data[auth_data->data_len], req->ie, req->ie_len); auth_data->data_len += req->ie_len; } if (req->key && req->key_len) { auth_data->key_len = req->key_len; auth_data->key_idx = req->key_idx; memcpy(auth_data->key, req->key, req->key_len); } auth_data->algorithm = auth_alg; /* try to authenticate/probe */ if (ifmgd->auth_data) { if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { auth_data->peer_confirmed = ifmgd->auth_data->peer_confirmed; } ieee80211_destroy_auth_data(sdata, cont_auth); } /* prep auth_data so we don't go into idle on disassoc */ ifmgd->auth_data = auth_data; /* If this is continuation of an ongoing SAE authentication exchange * (i.e., request to send SAE Confirm) and the peer has already * confirmed, mark authentication completed since we are about to send * out SAE Confirm. */ if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && auth_data->peer_confirmed && auth_data->sae_trans == 2) ieee80211_mark_sta_auth(sdata); if (ifmgd->associated) { u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; sdata_info(sdata, "disconnect from AP %pM for new auth to %pM\n", sdata->vif.cfg.ap_addr, auth_data->ap_addr); ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, WLAN_REASON_UNSPECIFIED, false, frame_buf); ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, WLAN_REASON_UNSPECIFIED, false); } /* needed for transmitting the auth frame(s) properly */ memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); err = ieee80211_prep_connection(sdata, req->bss, req->link_id, req->ap_mld_addr, cont_auth, false); if (err) goto err_clear; if (req->link_id > 0) link = sdata_dereference(sdata->link[req->link_id], sdata); else link = sdata_dereference(sdata->link[0], sdata); if (WARN_ON(!link)) { err = -ENOLINK; goto err_clear; } sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", auth_data->ap_addr, link->conf->addr); err = ieee80211_auth(sdata); if (err) { sta_info_destroy_addr(sdata, auth_data->ap_addr); goto err_clear; } /* hold our own reference */ cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); return 0; err_clear: if (!ieee80211_vif_is_mld(&sdata->vif)) { eth_zero_addr(sdata->deflink.u.mgd.bssid); ieee80211_link_info_change_notify(sdata, &sdata->deflink, BSS_CHANGED_BSSID); ieee80211_link_release_channel(&sdata->deflink); } ifmgd->auth_data = NULL; kfree(auth_data); return err; } static ieee80211_conn_flags_t ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgd_assoc_data *assoc_data, struct cfg80211_assoc_request *req, ieee80211_conn_flags_t conn_flags, unsigned int link_id) { struct ieee80211_local *local = sdata->local; const struct cfg80211_bss_ies *bss_ies; struct ieee80211_supported_band *sband; const struct element *ht_elem, *vht_elem; struct ieee80211_link_data *link; struct cfg80211_bss *cbss; struct ieee80211_bss *bss; bool is_5ghz, is_6ghz; cbss = assoc_data->link[link_id].bss; if (WARN_ON(!cbss)) return 0; bss = (void *)cbss->priv; sband = local->hw.wiphy->bands[cbss->channel->band]; if (WARN_ON(!sband)) return 0; link = sdata_dereference(sdata->link[link_id], sdata); if (WARN_ON(!link)) return 0; is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; /* for MLO connections assume advertising all rates is OK */ if (!req->ap_mld_addr) { assoc_data->supp_rates = bss->supp_rates; assoc_data->supp_rates_len = bss->supp_rates_len; } /* copy and link elems for the STA profile */ if (req->links[link_id].elems_len) { memcpy(assoc_data->ie_pos, req->links[link_id].elems, req->links[link_id].elems_len); assoc_data->link[link_id].elems = assoc_data->ie_pos; assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; assoc_data->ie_pos += req->links[link_id].elems_len; } rcu_read_lock(); ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) assoc_data->link[link_id].ap_ht_param = ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; else if (!is_6ghz) conn_flags |= IEEE80211_CONN_DISABLE_HT; vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, sizeof(struct ieee80211_vht_cap)); } else if (is_5ghz) { link_info(link, "VHT capa missing/short, disabling VHT/HE/EHT\n"); conn_flags |= IEEE80211_CONN_DISABLE_VHT | IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; } rcu_read_unlock(); link->u.mgd.beacon_crc_valid = false; link->u.mgd.dtim_period = 0; link->u.mgd.have_beacon = false; /* override HT/VHT configuration only if the AP and we support it */ if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { struct ieee80211_sta_ht_cap sta_ht_cap; memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); } link->conf->eht_puncturing = 0; rcu_read_lock(); bss_ies = rcu_dereference(cbss->beacon_ies); if (bss_ies) { u8 dtim_count = 0; ieee80211_get_dtim(bss_ies, &dtim_count, &link->u.mgd.dtim_period); sdata->deflink.u.mgd.have_beacon = true; if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { link->conf->sync_tsf = bss_ies->tsf; link->conf->sync_device_ts = bss->device_ts_beacon; link->conf->sync_dtim_count = dtim_count; } } else { bss_ies = rcu_dereference(cbss->ies); } if (bss_ies) { const struct ieee80211_eht_operation *eht_oper; const struct element *elem; elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, bss_ies->data, bss_ies->len); if (elem && elem->datalen >= 3) link->conf->profile_periodicity = elem->data[2]; else link->conf->profile_periodicity = 0; elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, bss_ies->data, bss_ies->len); if (elem && elem->datalen >= 11 && (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) link->conf->ema_ap = true; else link->conf->ema_ap = false; elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_OPERATION, bss_ies->data, bss_ies->len); eht_oper = (const void *)(elem->data + 1); if (elem && ieee80211_eht_oper_size_ok((const void *)(elem->data + 1), elem->datalen - 1) && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && (eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { const struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional; const u8 *disable_subchannel_bitmap = info->optional; u16 bitmap; bitmap = get_unaligned_le16(disable_subchannel_bitmap); if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, &link->conf->chandef) && !(bitmap && ieee80211_hw_check(&local->hw, DISALLOW_PUNCTURING))) ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, NULL); else conn_flags |= IEEE80211_CONN_DISABLE_EHT; } } rcu_read_unlock(); if (bss->corrupt_data) { char *corrupt_type = "data"; if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) corrupt_type = "beacon and probe response"; else corrupt_type = "beacon"; } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { corrupt_type = "probe response"; } sdata_info(sdata, "associating to AP %pM with corrupt %s\n", cbss->bssid, corrupt_type); } if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { if (sdata->u.mgd.powersave) link->smps_mode = IEEE80211_SMPS_DYNAMIC; else link->smps_mode = IEEE80211_SMPS_OFF; } else { link->smps_mode = link->u.mgd.req_smps; } return conn_flags; } int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, struct cfg80211_assoc_request *req) { unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_mgd_assoc_data *assoc_data; const struct element *ssid_elem; struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; ieee80211_conn_flags_t conn_flags = 0; struct ieee80211_link_data *link; struct cfg80211_bss *cbss; struct ieee80211_bss *bss; bool override; int i, err; size_t size = sizeof(*assoc_data) + req->ie_len; for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) size += req->links[i].elems_len; /* FIXME: no support for 4-addr MLO yet */ if (sdata->u.mgd.use_4addr && req->link_id >= 0) return -EOPNOTSUPP; assoc_data = kzalloc(size, GFP_KERNEL); if (!assoc_data) return -ENOMEM; cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; if (ieee80211_mgd_csa_in_process(sdata, cbss)) { sdata_info(sdata, "AP is in CSA process, reject assoc\n"); kfree(assoc_data); return -EINVAL; } rcu_read_lock(); ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { rcu_read_unlock(); kfree(assoc_data); return -EINVAL; } memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); assoc_data->ssid_len = ssid_elem->datalen; memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); vif_cfg->ssid_len = assoc_data->ssid_len; rcu_read_unlock(); if (req->ap_mld_addr) { for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { if (!req->links[i].bss) continue; link = sdata_dereference(sdata->link[i], sdata); if (link) ether_addr_copy(assoc_data->link[i].addr, link->conf->addr); else eth_random_addr(assoc_data->link[i].addr); } } else { memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); } assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; memcpy(assoc_data->ap_addr, req->ap_mld_addr ?: req->bss->bssid, ETH_ALEN); if (ifmgd->associated) { u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; sdata_info(sdata, "disconnect from AP %pM for new assoc to %pM\n", sdata->vif.cfg.ap_addr, assoc_data->ap_addr); ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, WLAN_REASON_UNSPECIFIED, false, frame_buf); ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, WLAN_REASON_UNSPECIFIED, false); } if (ifmgd->auth_data && !ifmgd->auth_data->done) { err = -EBUSY; goto err_free; } if (ifmgd->assoc_data) { err = -EBUSY; goto err_free; } if (ifmgd->auth_data) { bool match; /* keep sta info, bssid if matching */ match = ether_addr_equal(ifmgd->auth_data->ap_addr, assoc_data->ap_addr) && ifmgd->auth_data->link_id == req->link_id; /* Cleanup is delayed if auth_data matches */ if (!match) ieee80211_destroy_auth_data(sdata, false); } /* prepare assoc data */ bss = (void *)cbss->priv; assoc_data->wmm = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); /* * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. * We still associate in non-HT mode (11a/b/g) if any one of these * ciphers is configured as pairwise. * We can set this to true for non-11n hardware, that'll be checked * separately along with the peer capabilities. */ for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { conn_flags |= IEEE80211_CONN_DISABLE_HT; conn_flags |= IEEE80211_CONN_DISABLE_VHT; conn_flags |= IEEE80211_CONN_DISABLE_HE; conn_flags |= IEEE80211_CONN_DISABLE_EHT; netdev_info(sdata->dev, "disabling HT/VHT/HE due to WEP/TKIP use\n"); } } /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ if (!bss->wmm_used) { conn_flags |= IEEE80211_CONN_DISABLE_HT; conn_flags |= IEEE80211_CONN_DISABLE_VHT; conn_flags |= IEEE80211_CONN_DISABLE_HE; conn_flags |= IEEE80211_CONN_DISABLE_EHT; netdev_info(sdata->dev, "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); } if (req->flags & ASSOC_REQ_DISABLE_HT) { mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); conn_flags |= IEEE80211_CONN_DISABLE_HT; conn_flags |= IEEE80211_CONN_DISABLE_VHT; conn_flags |= IEEE80211_CONN_DISABLE_HE; conn_flags |= IEEE80211_CONN_DISABLE_EHT; } if (req->flags & ASSOC_REQ_DISABLE_VHT) { mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); conn_flags |= IEEE80211_CONN_DISABLE_VHT; } if (req->flags & ASSOC_REQ_DISABLE_HE) { mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); conn_flags |= IEEE80211_CONN_DISABLE_HE; conn_flags |= IEEE80211_CONN_DISABLE_EHT; } if (req->flags & ASSOC_REQ_DISABLE_EHT) conn_flags |= IEEE80211_CONN_DISABLE_EHT; memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, sizeof(ifmgd->ht_capa_mask)); memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, sizeof(ifmgd->vht_capa_mask)); memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, sizeof(ifmgd->s1g_capa_mask)); if (req->ie && req->ie_len) { memcpy(assoc_data->ie, req->ie, req->ie_len); assoc_data->ie_len = req->ie_len; assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; } else { assoc_data->ie_pos = assoc_data->ie; } if (req->fils_kek) { /* should already be checked in cfg80211 - so warn */ if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { err = -EINVAL; goto err_free; } memcpy(assoc_data->fils_kek, req->fils_kek, req->fils_kek_len); assoc_data->fils_kek_len = req->fils_kek_len; } if (req->fils_nonces) memcpy(assoc_data->fils_nonces, req->fils_nonces, 2 * FILS_NONCE_LEN); /* default timeout */ assoc_data->timeout = jiffies; assoc_data->timeout_started = true; assoc_data->assoc_link_id = assoc_link_id; if (req->ap_mld_addr) { for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { assoc_data->link[i].conn_flags = conn_flags; assoc_data->link[i].bss = req->links[i].bss; assoc_data->link[i].disabled = req->links[i].disabled; } /* if there was no authentication, set up the link */ err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); if (err) goto err_clear; } else { assoc_data->link[0].conn_flags = conn_flags; assoc_data->link[0].bss = cbss; } link = sdata_dereference(sdata->link[assoc_link_id], sdata); if (WARN_ON(!link)) { err = -EINVAL; goto err_clear; } /* keep old conn_flags from ieee80211_prep_channel() from auth */ conn_flags |= link->u.mgd.conn_flags; conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, conn_flags, assoc_link_id); override = link->u.mgd.conn_flags != conn_flags; link->u.mgd.conn_flags |= conn_flags; if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; if (bss->wmm_used && bss->uapsd_supported && (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { assoc_data->uapsd = true; ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; } else { assoc_data->uapsd = false; ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; } if (req->prev_bssid) memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); if (req->use_mfp) { ifmgd->mfp = IEEE80211_MFP_REQUIRED; ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; } else { ifmgd->mfp = IEEE80211_MFP_DISABLED; ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; } if (req->flags & ASSOC_REQ_USE_RRM) ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; else ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; if (req->crypto.control_port) ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; else ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; sdata->control_port_protocol = req->crypto.control_port_ethertype; sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; sdata->control_port_over_nl80211 = req->crypto.control_port_over_nl80211; sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; /* kick off associate process */ ifmgd->assoc_data = assoc_data; for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { if (!assoc_data->link[i].bss) continue; if (i == assoc_data->assoc_link_id) continue; /* only calculate the flags, hence link == NULL */ err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss, true, &assoc_data->link[i].conn_flags); if (err) { req->links[i].error = err; goto err_clear; } } /* needed for transmitting the assoc frames properly */ memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); err = ieee80211_prep_connection(sdata, cbss, req->link_id, req->ap_mld_addr, true, override); if (err) goto err_clear; assoc_data->link[assoc_data->assoc_link_id].conn_flags = link->u.mgd.conn_flags; if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { const struct cfg80211_bss_ies *beacon_ies; rcu_read_lock(); beacon_ies = rcu_dereference(req->bss->beacon_ies); if (!beacon_ies) { /* * Wait up to one beacon interval ... * should this be more if we miss one? */ sdata_info(sdata, "waiting for beacon from %pM\n", link->u.mgd.bssid); assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); assoc_data->timeout_started = true; assoc_data->need_beacon = true; } rcu_read_unlock(); } run_again(sdata, assoc_data->timeout); /* We are associating, clean up auth_data */ if (ifmgd->auth_data) ieee80211_destroy_auth_data(sdata, true); return 0; err_clear: if (!ifmgd->auth_data) { eth_zero_addr(sdata->deflink.u.mgd.bssid); ieee80211_link_info_change_notify(sdata, &sdata->deflink, BSS_CHANGED_BSSID); } ifmgd->assoc_data = NULL; err_free: kfree(assoc_data); return err; } int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, struct cfg80211_deauth_request *req) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; bool tx = !req->local_state_change; struct ieee80211_prep_tx_info info = { .subtype = IEEE80211_STYPE_DEAUTH, }; if (ifmgd->auth_data && ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { sdata_info(sdata, "aborting authentication with %pM by local choice (Reason: %u=%s)\n", req->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); info.link_id = ifmgd->auth_data->link_id; drv_mgd_prepare_tx(sdata->local, sdata, &info); ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, IEEE80211_STYPE_DEAUTH, req->reason_code, tx, frame_buf); ieee80211_destroy_auth_data(sdata, false); ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, req->reason_code, false); drv_mgd_complete_tx(sdata->local, sdata, &info); return 0; } if (ifmgd->assoc_data && ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { sdata_info(sdata, "aborting association with %pM by local choice (Reason: %u=%s)\n", req->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); info.link_id = ifmgd->assoc_data->assoc_link_id; drv_mgd_prepare_tx(sdata->local, sdata, &info); ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, IEEE80211_STYPE_DEAUTH, req->reason_code, tx, frame_buf); ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, req->reason_code, false); drv_mgd_complete_tx(sdata->local, sdata, &info); return 0; } if (ifmgd->associated && ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { sdata_info(sdata, "deauthenticating from %pM by local choice (Reason: %u=%s)\n", req->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, req->reason_code, tx, frame_buf); ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, req->reason_code, false); drv_mgd_complete_tx(sdata->local, sdata, &info); return 0; } return -ENOTCONN; } int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, struct cfg80211_disassoc_request *req) { u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; if (!sdata->u.mgd.associated || memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) return -ENOTCONN; sdata_info(sdata, "disassociating from %pM by local choice (Reason: %u=%s)\n", req->ap_addr, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, req->reason_code, !req->local_state_change, frame_buf); ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, req->reason_code, false); return 0; } void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) { wiphy_work_cancel(link->sdata->local->hw.wiphy, &link->u.mgd.request_smps_work); wiphy_work_cancel(link->sdata->local->hw.wiphy, &link->u.mgd.recalc_smps); wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, &link->u.mgd.chswitch_work); } void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; /* * Make sure some work items will not run after this, * they will not do anything but might not have been * cancelled when disconnecting. */ wiphy_work_cancel(sdata->local->hw.wiphy, &ifmgd->monitor_work); wiphy_work_cancel(sdata->local->hw.wiphy, &ifmgd->beacon_connection_loss_work); wiphy_work_cancel(sdata->local->hw.wiphy, &ifmgd->csa_connection_drop_work); wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->tdls_peer_del_work); wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ml_reconf_work); wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); if (ifmgd->assoc_data) ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); if (ifmgd->auth_data) ieee80211_destroy_auth_data(sdata, false); spin_lock_bh(&ifmgd->teardown_lock); if (ifmgd->teardown_skb) { kfree_skb(ifmgd->teardown_skb); ifmgd->teardown_skb = NULL; ifmgd->orig_teardown_skb = NULL; } kfree(ifmgd->assoc_req_ies); ifmgd->assoc_req_ies = NULL; ifmgd->assoc_req_ies_len = 0; spin_unlock_bh(&ifmgd->teardown_lock); del_timer_sync(&ifmgd->timer); } void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, enum nl80211_cqm_rssi_threshold_event rssi_event, s32 rssi_level, gfp_t gfp) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); } EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); trace_api_cqm_beacon_loss_notify(sdata->local, sdata); cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); } EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, int rssi_min_thold, int rssi_max_thold) { trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) return; /* * Scale up threshold values before storing it, as the RSSI averaging * algorithm uses a scaled up value as well. Change this scaling * factor if the RSSI averaging algorithm changes. */ sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; } void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, int rssi_min_thold, int rssi_max_thold) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); WARN_ON(rssi_min_thold == rssi_max_thold || rssi_min_thold > rssi_max_thold); _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); } EXPORT_SYMBOL(ieee80211_enable_rssi_reports); void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); _ieee80211_enable_rssi_reports(sdata, 0, 0); } EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
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