| /* |
| * 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 Intel Deutschland GmbH |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/delay.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" |
| |
| #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
| #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) |
| #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) |
| #define IEEE80211_AUTH_MAX_TRIES 3 |
| #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) |
| #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 |
| |
| 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 |
| |
| /* |
| * 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) |
| { |
| sdata_assert_lock(sdata); |
| |
| 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(!sdata->u.mgd.associated)) |
| return; |
| |
| ifmgd->probe_send_count = 0; |
| |
| if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) |
| return; |
| |
| mod_timer(&sdata->u.mgd.conn_mon_timer, |
| round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); |
| } |
| |
| static int ecw2cw(int ecw) |
| { |
| return (1 << ecw) - 1; |
| } |
| |
| static u32 |
| ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_supported_band *sband, |
| struct ieee80211_channel *channel, |
| const struct ieee80211_ht_cap *ht_cap, |
| const struct ieee80211_ht_operation *ht_oper, |
| const struct ieee80211_vht_operation *vht_oper, |
| struct cfg80211_chan_def *chandef, bool tracking) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct cfg80211_chan_def vht_chandef; |
| struct ieee80211_sta_ht_cap sta_ht_cap; |
| u32 ht_cfreq, ret; |
| |
| memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); |
| ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); |
| |
| chandef->chan = channel; |
| chandef->width = NL80211_CHAN_WIDTH_20_NOHT; |
| chandef->center_freq1 = channel->center_freq; |
| chandef->center_freq2 = 0; |
| |
| if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) { |
| ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; |
| goto out; |
| } |
| |
| chandef->width = NL80211_CHAN_WIDTH_20; |
| |
| if (!(ht_cap->cap_info & |
| cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) { |
| ret = IEEE80211_STA_DISABLE_40MHZ; |
| vht_chandef = *chandef; |
| goto out; |
| } |
| |
| 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_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; |
| goto out; |
| } |
| |
| /* check 40 MHz support, if we have it */ |
| if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { |
| switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
| case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
| chandef->width = NL80211_CHAN_WIDTH_40; |
| chandef->center_freq1 += 10; |
| break; |
| case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
| chandef->width = NL80211_CHAN_WIDTH_40; |
| chandef->center_freq1 -= 10; |
| break; |
| } |
| } else { |
| /* 40 MHz (and 80 MHz) must be supported for VHT */ |
| ret = IEEE80211_STA_DISABLE_VHT; |
| /* also mark 40 MHz disabled */ |
| ret |= IEEE80211_STA_DISABLE_40MHZ; |
| goto out; |
| } |
| |
| if (!vht_oper || !sband->vht_cap.vht_supported) { |
| ret = IEEE80211_STA_DISABLE_VHT; |
| goto out; |
| } |
| |
| vht_chandef.chan = channel; |
| vht_chandef.center_freq1 = |
| ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx, |
| channel->band); |
| vht_chandef.center_freq2 = 0; |
| |
| switch (vht_oper->chan_width) { |
| case IEEE80211_VHT_CHANWIDTH_USE_HT: |
| vht_chandef.width = chandef->width; |
| vht_chandef.center_freq1 = chandef->center_freq1; |
| break; |
| case IEEE80211_VHT_CHANWIDTH_80MHZ: |
| vht_chandef.width = NL80211_CHAN_WIDTH_80; |
| break; |
| case IEEE80211_VHT_CHANWIDTH_160MHZ: |
| vht_chandef.width = NL80211_CHAN_WIDTH_160; |
| break; |
| case IEEE80211_VHT_CHANWIDTH_80P80MHZ: |
| vht_chandef.width = NL80211_CHAN_WIDTH_80P80; |
| vht_chandef.center_freq2 = |
| ieee80211_channel_to_frequency( |
| vht_oper->center_freq_seg2_idx, |
| channel->band); |
| break; |
| default: |
| if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
| sdata_info(sdata, |
| "AP VHT operation IE has invalid channel width (%d), disable VHT\n", |
| vht_oper->chan_width); |
| ret = IEEE80211_STA_DISABLE_VHT; |
| goto out; |
| } |
| |
| if (!cfg80211_chandef_valid(&vht_chandef)) { |
| if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
| sdata_info(sdata, |
| "AP VHT information is invalid, disable VHT\n"); |
| ret = IEEE80211_STA_DISABLE_VHT; |
| goto out; |
| } |
| |
| if (cfg80211_chandef_identical(chandef, &vht_chandef)) { |
| ret = 0; |
| goto out; |
| } |
| |
| if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { |
| if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
| sdata_info(sdata, |
| "AP VHT information doesn't match HT, disable VHT\n"); |
| ret = IEEE80211_STA_DISABLE_VHT; |
| goto out; |
| } |
| |
| *chandef = vht_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, &sdata->vif.bss_conf.chandef)) |
| return ret; |
| |
| /* don't print the message below for VHT mismatch if VHT is disabled */ |
| if (ret & IEEE80211_STA_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_STA_DISABLE_HT | |
| IEEE80211_STA_DISABLE_VHT; |
| break; |
| } |
| |
| ret |= ieee80211_chandef_downgrade(chandef); |
| } |
| |
| 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_sub_if_data *sdata, |
| struct sta_info *sta, |
| const struct ieee80211_ht_cap *ht_cap, |
| const struct ieee80211_ht_operation *ht_oper, |
| const struct ieee80211_vht_operation *vht_oper, |
| const u8 *bssid, u32 *changed) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_channel *chan; |
| struct cfg80211_chan_def chandef; |
| u16 ht_opmode; |
| u32 flags; |
| enum ieee80211_sta_rx_bandwidth new_sta_bw; |
| int ret; |
| |
| /* if HT was/is disabled, don't track any bandwidth changes */ |
| if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) |
| return 0; |
| |
| /* don't check VHT if we associated as non-VHT station */ |
| if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) |
| vht_oper = NULL; |
| |
| if (WARN_ON_ONCE(!sta)) |
| return -EINVAL; |
| |
| /* |
| * 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 (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { |
| *changed |= BSS_CHANGED_HT; |
| sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
| } |
| |
| chan = sdata->vif.bss_conf.chandef.chan; |
| sband = local->hw.wiphy->bands[chan->band]; |
| |
| /* calculate new channel (type) based on HT/VHT operation IEs */ |
| flags = ieee80211_determine_chantype(sdata, sband, chan, |
| ht_cap, ht_oper, vht_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 (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && |
| chandef.width == NL80211_CHAN_WIDTH_80P80) |
| flags |= ieee80211_chandef_downgrade(&chandef); |
| if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && |
| chandef.width == NL80211_CHAN_WIDTH_160) |
| flags |= ieee80211_chandef_downgrade(&chandef); |
| if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && |
| chandef.width > NL80211_CHAN_WIDTH_20) |
| flags |= ieee80211_chandef_downgrade(&chandef); |
| |
| if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) |
| return 0; |
| |
| sdata_info(sdata, |
| "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", |
| ifmgd->bssid, chandef.chan->center_freq, chandef.width, |
| chandef.center_freq1, chandef.center_freq2); |
| |
| if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | |
| IEEE80211_STA_DISABLE_VHT | |
| IEEE80211_STA_DISABLE_40MHZ | |
| IEEE80211_STA_DISABLE_80P80MHZ | |
| IEEE80211_STA_DISABLE_160MHZ)) || |
| !cfg80211_chandef_valid(&chandef)) { |
| sdata_info(sdata, |
| "AP %pM changed bandwidth in a way we can't support - disconnect\n", |
| ifmgd->bssid); |
| return -EINVAL; |
| } |
| |
| switch (chandef.width) { |
| case NL80211_CHAN_WIDTH_20_NOHT: |
| case NL80211_CHAN_WIDTH_20: |
| new_sta_bw = IEEE80211_STA_RX_BW_20; |
| break; |
| case NL80211_CHAN_WIDTH_40: |
| new_sta_bw = IEEE80211_STA_RX_BW_40; |
| break; |
| case NL80211_CHAN_WIDTH_80: |
| new_sta_bw = IEEE80211_STA_RX_BW_80; |
| break; |
| case NL80211_CHAN_WIDTH_80P80: |
| case NL80211_CHAN_WIDTH_160: |
| new_sta_bw = IEEE80211_STA_RX_BW_160; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (new_sta_bw > sta->cur_max_bandwidth) |
| new_sta_bw = sta->cur_max_bandwidth; |
| |
| if (new_sta_bw < sta->sta.bandwidth) { |
| sta->sta.bandwidth = new_sta_bw; |
| rate_control_rate_update(local, sband, sta, |
| IEEE80211_RC_BW_CHANGED); |
| } |
| |
| ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); |
| if (ret) { |
| sdata_info(sdata, |
| "AP %pM changed bandwidth to incompatible one - disconnect\n", |
| ifmgd->bssid); |
| return ret; |
| } |
| |
| if (new_sta_bw > sta->sta.bandwidth) { |
| sta->sta.bandwidth = new_sta_bw; |
| rate_control_rate_update(local, sband, sta, |
| IEEE80211_RC_BW_CHANGED); |
| } |
| |
| 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) |
| { |
| 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 (sdata->u.mgd.flags & IEEE80211_STA_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); |
| 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 may set the owner of the MU-MIMO capability |
| */ |
| static void 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) |
| { |
| 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; |
| |
| 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 (sdata->u.mgd.flags & IEEE80211_STA_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 (sdata->u.mgd.flags & IEEE80211_STA_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 capablity 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->flags & IEEE80211_SDATA_MU_MIMO_OWNER) { |
| disable_mu_mimo = true; |
| break; |
| } |
| } |
| if (disable_mu_mimo) |
| cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; |
| else |
| sdata->flags |= IEEE80211_SDATA_MU_MIMO_OWNER; |
| } |
| |
| 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); |
| } |
| |
| static void 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 sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| u8 *pos, qos_info; |
| size_t offset = 0, noffset; |
| int i, count, rates_len, supp_rates_len, shift; |
| u16 capab; |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_chanctx_conf *chanctx_conf; |
| struct ieee80211_channel *chan; |
| u32 rate_flags, rates = 0; |
| |
| sdata_assert_lock(sdata); |
| |
| rcu_read_lock(); |
| chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| if (WARN_ON(!chanctx_conf)) { |
| rcu_read_unlock(); |
| return; |
| } |
| chan = chanctx_conf->def.chan; |
| rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); |
| rcu_read_unlock(); |
| sband = local->hw.wiphy->bands[chan->band]; |
| shift = ieee80211_vif_get_shift(&sdata->vif); |
| |
| 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(&chanctx_conf->def, 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 = 0; |
| for (i = 0; i < sband->n_bitrates; i++) { |
| if ((rate_flags & sband->bitrates[i].flags) |
| != rate_flags) |
| continue; |
| rates |= BIT(i); |
| rates_len++; |
| } |
| } |
| |
| skb = alloc_skb(local->hw.extra_tx_headroom + |
| sizeof(*mgmt) + /* bit too much but doesn't matter */ |
| 2 + assoc_data->ssid_len + /* SSID */ |
| 4 + rates_len + /* (extended) rates */ |
| 4 + /* power capability */ |
| 2 + 2 * sband->n_channels + /* supported channels */ |
| 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ |
| 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ |
| assoc_data->ie_len + /* extra IEs */ |
| 9, /* WMM */ |
| GFP_KERNEL); |
| if (!skb) |
| return; |
| |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| capab = WLAN_CAPABILITY_ESS; |
| |
| if (sband->band == IEEE80211_BAND_2GHZ) { |
| capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; |
| capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; |
| } |
| |
| if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) |
| capab |= WLAN_CAPABILITY_PRIVACY; |
| |
| if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
| ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) |
| capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; |
| |
| if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) |
| capab |= WLAN_CAPABILITY_RADIO_MEASURE; |
| |
| mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| memset(mgmt, 0, 24); |
| memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
| memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); |
| |
| if (!is_zero_ether_addr(assoc_data->prev_bssid)) { |
| skb_put(skb, 10); |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| IEEE80211_STYPE_REASSOC_REQ); |
| mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); |
| mgmt->u.reassoc_req.listen_interval = |
| cpu_to_le16(local->hw.conf.listen_interval); |
| memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, |
| ETH_ALEN); |
| } else { |
| skb_put(skb, 4); |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| IEEE80211_STYPE_ASSOC_REQ); |
| mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); |
| mgmt->u.assoc_req.listen_interval = |
| cpu_to_le16(local->hw.conf.listen_interval); |
| } |
| |
| /* SSID */ |
| pos = skb_put(skb, 2 + assoc_data->ssid_len); |
| *pos++ = WLAN_EID_SSID; |
| *pos++ = assoc_data->ssid_len; |
| memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); |
| |
| /* add all rates which were marked to be used above */ |
| 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 * (1 << shift)); |
| *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 * (1 << shift)); |
| *pos++ = (u8) rate; |
| } |
| } |
| } |
| |
| if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || |
| capab & WLAN_CAPABILITY_RADIO_MEASURE) { |
| 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(&chanctx_conf->def); |
| } |
| |
| if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { |
| /* 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++) { |
| *pos++ = ieee80211_frequency_to_channel( |
| sband->channels[i].center_freq); |
| *pos++ = 1; /* one channel in the subband*/ |
| } |
| } |
| |
| /* if present, add any custom IEs that go before HT */ |
| if (assoc_data->ie_len) { |
| 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, |
| WLAN_EID_EXT_CAPABILITY, |
| WLAN_EID_QOS_TRAFFIC_CAPA, |
| WLAN_EID_TIM_BCAST_REQ, |
| WLAN_EID_INTERWORKING, |
| /* 60GHz doesn't happen right now */ |
| WLAN_EID_VHT_CAPABILITY, |
| WLAN_EID_OPMODE_NOTIF, |
| }; |
| |
| noffset = ieee80211_ie_split_ric(assoc_data->ie, |
| assoc_data->ie_len, |
| before_ht, |
| ARRAY_SIZE(before_ht), |
| after_ric, |
| ARRAY_SIZE(after_ric), |
| offset); |
| pos = skb_put(skb, noffset - offset); |
| memcpy(pos, assoc_data->ie + offset, noffset - offset); |
| offset = noffset; |
| } |
| |
| if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && |
| !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) |
| ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
| |
| if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) |
| ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, |
| sband, chan, sdata->smps_mode); |
| |
| /* if present, add any custom IEs that go before VHT */ |
| if (assoc_data->ie_len) { |
| static const u8 before_vht[] = { |
| 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_SUPPORTED_REGULATORY_CLASSES, |
| WLAN_EID_HT_CAPABILITY, |
| WLAN_EID_BSS_COEX_2040, |
| WLAN_EID_EXT_CAPABILITY, |
| WLAN_EID_QOS_TRAFFIC_CAPA, |
| WLAN_EID_TIM_BCAST_REQ, |
| WLAN_EID_INTERWORKING, |
| }; |
| |
| /* RIC already taken above, so no need to handle here anymore */ |
| noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, |
| before_vht, ARRAY_SIZE(before_vht), |
| offset); |
| pos = skb_put(skb, noffset - offset); |
| memcpy(pos, assoc_data->ie + offset, noffset - offset); |
| offset = noffset; |
| } |
| |
| if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
| ieee80211_add_vht_ie(sdata, skb, sband, |
| &assoc_data->ap_vht_cap); |
| |
| /* if present, add any custom non-vendor IEs that go after HT */ |
| if (assoc_data->ie_len) { |
| noffset = ieee80211_ie_split_vendor(assoc_data->ie, |
| assoc_data->ie_len, |
| offset); |
| pos = skb_put(skb, noffset - offset); |
| memcpy(pos, 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; |
| pos = skb_put(skb, noffset - offset); |
| memcpy(pos, assoc_data->ie + offset, noffset - offset); |
| } |
| |
| drv_mgd_prepare_tx(local, sdata); |
| |
| 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); |
| } |
| |
| 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); |
| 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); |
| } |
| |
| static 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 = (struct ieee80211_hdr *) skb_put(skb, 30); |
| memset(nullfunc, 0, 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->u.mgd.bssid, ETH_ALEN); |
| memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); |
| memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); |
| memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); |
| |
| IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| ieee80211_tx_skb(sdata, skb); |
| } |
| |
| /* spectrum management related things */ |
| static void ieee80211_chswitch_work(struct work_struct *work) |
| { |
| struct ieee80211_sub_if_data *sdata = |
| container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| int ret; |
| |
| if (!ieee80211_sdata_running(sdata)) |
| return; |
| |
| sdata_lock(sdata); |
| mutex_lock(&local->mtx); |
| mutex_lock(&local->chanctx_mtx); |
| |
| if (!ifmgd->associated) |
| goto out; |
| |
| if (!sdata->vif.csa_active) |
| goto out; |
| |
| /* |
| * 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 (sdata->reserved_chanctx) { |
| /* |
| * with multi-vif csa driver may call ieee80211_csa_finish() |
| * many times while waiting for other interfaces to use their |
| * reservations |
| */ |
| if (sdata->reserved_ready) |
| goto out; |
| |
| ret = ieee80211_vif_use_reserved_context(sdata); |
| if (ret) { |
| sdata_info(sdata, |
| "failed to use reserved channel context, disconnecting (err=%d)\n", |
| ret); |
| ieee80211_queue_work(&sdata->local->hw, |
| &ifmgd->csa_connection_drop_work); |
| goto out; |
| } |
| |
| goto out; |
| } |
| |
| if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, |
| &sdata->csa_chandef)) { |
| sdata_info(sdata, |
| "failed to finalize channel switch, disconnecting\n"); |
| ieee80211_queue_work(&sdata->local->hw, |
| &ifmgd->csa_connection_drop_work); |
| goto out; |
| } |
| |
| /* XXX: shouldn't really modify cfg80211-owned data! */ |
| ifmgd->associated->channel = sdata->csa_chandef.chan; |
| |
| ifmgd->csa_waiting_bcn = true; |
| |
| ieee80211_sta_reset_beacon_monitor(sdata); |
| ieee80211_sta_reset_conn_monitor(sdata); |
| |
| out: |
| mutex_unlock(&local->chanctx_mtx); |
| mutex_unlock(&local->mtx); |
| sdata_unlock(sdata); |
| } |
| |
| static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| int ret; |
| |
| sdata_assert_lock(sdata); |
| |
| WARN_ON(!sdata->vif.csa_active); |
| |
| if (sdata->csa_block_tx) { |
| ieee80211_wake_vif_queues(local, sdata, |
| IEEE80211_QUEUE_STOP_REASON_CSA); |
| sdata->csa_block_tx = false; |
| } |
| |
| sdata->vif.csa_active = false; |
| ifmgd->csa_waiting_bcn = false; |
| |
| ret = drv_post_channel_switch(sdata); |
| if (ret) { |
| sdata_info(sdata, |
| "driver post channel switch failed, disconnecting\n"); |
| ieee80211_queue_work(&local->hw, |
| &ifmgd->csa_connection_drop_work); |
| return; |
| } |
| |
| cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); |
| } |
| |
| void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) |
| { |
| struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| |
| trace_api_chswitch_done(sdata, success); |
| if (!success) { |
| sdata_info(sdata, |
| "driver channel switch failed, disconnecting\n"); |
| ieee80211_queue_work(&sdata->local->hw, |
| &ifmgd->csa_connection_drop_work); |
| } else { |
| ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
| } |
| } |
| EXPORT_SYMBOL(ieee80211_chswitch_done); |
| |
| static void ieee80211_chswitch_timer(unsigned long data) |
| { |
| struct ieee80211_sub_if_data *sdata = |
| (struct ieee80211_sub_if_data *) data; |
| |
| ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); |
| } |
| |
| static void |
| ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, |
| u64 timestamp, u32 device_timestamp, |
| struct ieee802_11_elems *elems, |
| bool beacon) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct cfg80211_bss *cbss = ifmgd->associated; |
| struct ieee80211_chanctx_conf *conf; |
| struct ieee80211_chanctx *chanctx; |
| enum ieee80211_band current_band; |
| struct ieee80211_csa_ie csa_ie; |
| struct ieee80211_channel_switch ch_switch; |
| int res; |
| |
| sdata_assert_lock(sdata); |
| |
| if (!cbss) |
| return; |
| |
| if (local->scanning) |
| return; |
| |
| /* disregard subsequent announcements if we are already processing */ |
| if (sdata->vif.csa_active) |
| return; |
| |
| current_band = cbss->channel->band; |
| memset(&csa_ie, 0, sizeof(csa_ie)); |
| res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, |
| ifmgd->flags, |
| ifmgd->associated->bssid, &csa_ie); |
| if (res < 0) |
| ieee80211_queue_work(&local->hw, |
| &ifmgd->csa_connection_drop_work); |
| if (res) |
| return; |
| |
| if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, |
| IEEE80211_CHAN_DISABLED)) { |
| sdata_info(sdata, |
| "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", |
| ifmgd->associated->bssid, |
| csa_ie.chandef.chan->center_freq, |
| csa_ie.chandef.width, csa_ie.chandef.center_freq1, |
| csa_ie.chandef.center_freq2); |
| ieee80211_queue_work(&local->hw, |
| &ifmgd->csa_connection_drop_work); |
| return; |
| } |
| |
| if (cfg80211_chandef_identical(&csa_ie.chandef, |
| &sdata->vif.bss_conf.chandef)) { |
| if (ifmgd->csa_ignored_same_chan) |
| return; |
| sdata_info(sdata, |
| "AP %pM tries to chanswitch to same channel, ignore\n", |
| ifmgd->associated->bssid); |
| ifmgd->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); |
| |
| mutex_lock(&local->mtx); |
| mutex_lock(&local->chanctx_mtx); |
| conf = rcu_dereference_protected(sdata->vif.chanctx_conf, |
| lockdep_is_held(&local->chanctx_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; |
| } |
| |
| 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; |
| |
| if (drv_pre_channel_switch(sdata, &ch_switch)) { |
| sdata_info(sdata, |
| "preparing for channel switch failed, disconnecting\n"); |
| goto drop_connection; |
| } |
| |
| res = ieee80211_vif_reserve_chanctx(sdata, &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; |
| } |
| mutex_unlock(&local->chanctx_mtx); |
| |
| sdata->vif.csa_active = true; |
| sdata->csa_chandef = csa_ie.chandef; |
| sdata->csa_block_tx = csa_ie.mode; |
| ifmgd->csa_ignored_same_chan = false; |
| |
| if (sdata->csa_block_tx) |
| ieee80211_stop_vif_queues(local, sdata, |
| IEEE80211_QUEUE_STOP_REASON_CSA); |
| mutex_unlock(&local->mtx); |
| |
| cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, |
| csa_ie.count); |
| |
| if (local->ops->channel_switch) { |
| /* use driver's channel switch callback */ |
| drv_channel_switch(local, sdata, &ch_switch); |
| return; |
| } |
| |
| /* channel switch handled in software */ |
| if (csa_ie.count <= 1) |
| ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); |
| else |
| mod_timer(&ifmgd->chswitch_timer, |
| TU_TO_EXP_TIME((csa_ie.count - 1) * |
| cbss->beacon_interval)); |
| return; |
| drop_connection: |
| ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); |
| mutex_unlock(&local->chanctx_mtx); |
| mutex_unlock(&local->mtx); |
| } |
| |
| 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); |
| /* fall through */ |
| case IEEE80211_BAND_2GHZ: |
| case IEEE80211_BAND_60GHZ: |
| chan_increment = 1; |
| break; |
| case IEEE80211_BAND_5GHZ: |
| chan_increment = 4; |
| break; |
| } |
| |
| /* 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 u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, |
| 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) |
| { |
| 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 (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 (sdata->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, |
| sdata->u.mgd.bssid); |
| } else { /* has_cisco_pwr is always true here. */ |
| new_ap_level = pwr_level_cisco; |
| |
| if (sdata->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, sdata->u.mgd.bssid); |
| } |
| |
| sdata->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); |
| cancel_work_sync(&local->dynamic_ps_enable_work); |
| } |
| } |
| |
| static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) |
| { |
| 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 (!mgd->have_beacon) |
| return false; |
| |
| rcu_read_lock(); |
| sta = sta_info_get(sdata, mgd->bssid); |
| 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)) { |
| 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->u.mgd.dtim_period; |
| s32 beaconint_us; |
| |
| beaconint_us = ieee80211_tu_to_usec( |
| found->vif.bss_conf.beacon_int); |
| |
| 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.bss_conf.ps != ps_allowed) { |
| sdata->vif.bss_conf.ps = ps_allowed; |
| ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); |
| } |
| } |
| |
| void ieee80211_dynamic_ps_disable_work(struct work_struct *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 work_struct *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(unsigned long data) |
| { |
| struct ieee80211_local *local = (void *) data; |
| |
| ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
| } |
| |
| void ieee80211_dfs_cac_timer_work(struct work_struct *work) |
| { |
| struct delayed_work *delayed_work = |
| container_of(work, struct delayed_work, work); |
| struct ieee80211_sub_if_data *sdata = |
| container_of(delayed_work, struct ieee80211_sub_if_data, |
| dfs_cac_timer_work); |
| struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; |
| |
| mutex_lock(&sdata->local->mtx); |
| if (sdata->wdev.cac_started) { |
| ieee80211_vif_release_channel(sdata); |
| cfg80211_cac_event(sdata->dev, &chandef, |
| NL80211_RADAR_CAC_FINISHED, |
| GFP_KERNEL); |
| } |
| mutex_unlock(&sdata->local->mtx); |
| } |
| |
| 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, ac, &sdata->tx_conf[ac])) |
| sdata_err(sdata, |
| "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; |
| /* The loop will result in using BK even if it requires |
| * admission control, such configuration makes no sense |
| * and we have to transmit somehow - the AC selection |
| * does the same thing. |
| */ |
| if (drv_conf_tx(local, sdata, ac, |
| &sdata->tx_conf[non_acm_ac])) |
| sdata_err(sdata, |
| "failed to set TX queue parameters for queue %d\n", |
| ac); |
| tx_tspec->action = TX_TSPEC_ACTION_NONE; |
| ret = true; |
| schedule_delayed_work(&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_bss_info_change_notify(sdata, BSS_CHANGED_QOS); |
| } |
| |
| static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *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); |
| } |
| |
| /* MLME */ |
| static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, |
| struct ieee80211_sub_if_data *sdata, |
| const u8 *wmm_param, size_t wmm_param_len) |
| { |
| struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| size_t left; |
| int 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; |
| if (count == ifmgd->wmm_last_param_set) |
| return false; |
| ifmgd->wmm_last_param_set = 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; |
| 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; |
| 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; |
| 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; |
| break; |
| } |
| |
| params[ac].aifs = pos[0] & 0x0f; |
| |
| if (params[ac].aifs < 2) { |
| sdata_info(sdata, |
| "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 > params[ac].cw_max) { |
| sdata_info(sdata, |
| "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; |
| } |
| } |
| |
| 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); |
| sdata->tx_conf[ac] = params[ac]; |
| if (!ifmgd->tx_tspec[ac].downgraded && |
| drv_conf_tx(local, sdata, ac, ¶ms[ac])) |
| sdata_err(sdata, |
| "failed to set TX queue parameters for AC %d\n", |
| ac); |
| } |
| |
| /* enable WMM or activate new settings */ |
| sdata->vif.bss_conf.qos = true; |
| return true; |
| } |
| |
| static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) |
| { |
| lockdep_assert_held(&sdata->local->mtx); |
| |
| 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) |
| { |
| mutex_lock(&sdata->local->mtx); |
| __ieee80211_stop_poll(sdata); |
| mutex_unlock(&sdata->local->mtx); |
| } |
| |
| static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
| u16 capab, bool erp_valid, u8 erp) |
| { |
| struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
| u32 changed = 0; |
| bool use_protection; |
| bool use_short_preamble; |
| bool use_short_slot; |
| |
| 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 (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ) |
| 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 void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
| struct cfg80211_bss *cbss, |
| u32 bss_info_changed) |
| { |
| struct ieee80211_bss *bss = (void *)cbss->priv; |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
| |
| bss_info_changed |= BSS_CHANGED_ASSOC; |
| bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
| bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); |
| |
| sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( |
| beacon_loss_count * bss_conf->beacon_int)); |
| |
| sdata->u.mgd.associated = cbss; |
| memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); |
| |
| sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; |
| |
| if (sdata->vif.p2p) { |
| 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) { |
| sdata->u.mgd.p2p_noa_index = |
| bss_conf->p2p_noa_attr.index; |
| bss_info_changed |= BSS_CHANGED_P2P_PS; |
| } |
| } |
| rcu_read_unlock(); |
| } |
| |
| /* just to be sure */ |
| ieee80211_stop_poll(sdata); |
| |
| ieee80211_led_assoc(local, 1); |
| |
| if (sdata->u.mgd.have_beacon) { |
| /* |
| * If the AP is buggy we may get here with no DTIM period |
| * known, so assume it's 1 which is the only safe assumption |
| * in that case, although if the TIM IE is broken powersave |
| * probably just won't work at all. |
| */ |
| bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; |
| bss_conf->beacon_rate = bss->beacon_rate; |
| bss_info_changed |= BSS_CHANGED_BEACON_INFO; |
| } else { |
| bss_conf->beacon_rate = NULL; |
| bss_conf->dtim_period = 0; |
| } |
| |
| bss_conf->assoc = 1; |
| |
| /* Tell the driver to monitor connection quality (if supported) */ |
| if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && |
| bss_conf->cqm_rssi_thold) |
| bss_info_changed |= BSS_CHANGED_CQM; |
| |
| /* Enable ARP filtering */ |
| if (bss_conf->arp_addr_cnt) |
| bss_info_changed |= BSS_CHANGED_ARP_FILTER; |
| |
| ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
| |
| mutex_lock(&local->iflist_mtx); |
| ieee80211_recalc_ps(local); |
| mutex_unlock(&local->iflist_mtx); |
| |
| ieee80211_recalc_smps(sdata); |
| 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; |
| u32 changed = 0; |
| |
| sdata_assert_lock(sdata); |
| |
| if (WARN_ON_ONCE(tx && !frame_buf)) |
| return; |
| |
| if (WARN_ON(!ifmgd->associated)) |
| return; |
| |
| ieee80211_stop_poll(sdata); |
| |
| ifmgd->associated = NULL; |
| 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) |
| ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, |
| reason, tx, frame_buf); |
| |
| /* flush out frame - make sure the deauth was actually sent */ |
| if (tx) |
| ieee80211_flush_queues(local, sdata, false); |
| |
| /* clear bssid only after building the needed mgmt frames */ |
| eth_zero_addr(ifmgd->bssid); |
| |
| /* remove AP and TDLS peers */ |
| sta_info_flush(sdata); |
| |
| /* finally reset all BSS / config parameters */ |
| changed |= ieee80211_reset_erp_info(sdata); |
| |
| ieee80211_led_assoc(local, 0); |
| changed |= BSS_CHANGED_ASSOC; |
| sdata->vif.bss_conf.assoc = false; |
| |
| ifmgd->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)); |
| sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER; |
| |
| sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; |
| |
| del_timer_sync(&local->dynamic_ps_timer); |
| cancel_work_sync(&local->dynamic_ps_enable_work); |
| |
| /* Disable ARP filtering */ |
| if (sdata->vif.bss_conf.arp_addr_cnt) |
| changed |= BSS_CHANGED_ARP_FILTER; |
| |
| sdata->vif.bss_conf.qos = false; |
| 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); |
| |
| /* disassociated - set to defaults now */ |
| ieee80211_set_wmm_default(sdata, 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); |
| del_timer_sync(&sdata->u.mgd.chswitch_timer); |
| |
| sdata->vif.bss_conf.dtim_period = 0; |
| sdata->vif.bss_conf.beacon_rate = NULL; |
| |
| ifmgd->have_beacon = false; |
| |
| ifmgd->flags = 0; |
| mutex_lock(&local->mtx); |
| ieee80211_vif_release_channel(sdata); |
| |
| sdata->vif.csa_active = false; |
| ifmgd->csa_waiting_bcn = false; |
| ifmgd->csa_ignored_same_chan = false; |
| if (sdata->csa_block_tx) { |
| ieee80211_wake_vif_queues(local, sdata, |
| IEEE80211_QUEUE_STOP_REASON_CSA); |
| sdata->csa_block_tx = false; |
| } |
| mutex_unlock(&local->mtx); |
| |
| /* existing TX TSPEC sessions no longer exist */ |
| memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); |
| cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); |
| |
| sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; |
| } |
| |
| void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
| struct ieee80211_hdr *hdr) |
| { |
| /* |
| * We can postpone the mgd.timer whenever receiving unicast frames |
| * from AP because we know that the connection is working both ways |
| * at that time. But multicast frames (and hence also beacons) must |
| * be ignored here, because we need to trigger the timer during |
| * data idle periods for sending the periodic probe request to the |
| * AP we're connected to. |
| */ |
| if (is_multicast_ether_addr(hdr->addr1)) |
| return; |
| |
| ieee80211_sta_reset_conn_monitor(sdata); |
| } |
| |
| 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; |
| |
| mutex_lock(&local->mtx); |
| if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) |
| goto out; |
| |
| __ieee80211_stop_poll(sdata); |
| |
| mutex_lock(&local->iflist_mtx); |
| ieee80211_recalc_ps(local); |
| mutex_unlock(&local->iflist_mtx); |
| |
| if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) |
| goto out; |
| |
| /* |
| * 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)); |
| out: |
| mutex_unlock(&local->mtx); |
| } |
| |
| 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 = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
| int ac = ieee80211_ac_from_tid(tid); |
| struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; |
| unsigned long now = jiffies; |
| |
| 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; |
| schedule_delayed_work(&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; |
| schedule_delayed_work(&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_data(hdr->frame_control)) |
| return; |
| |
| if (ieee80211_is_nullfunc(hdr->frame_control) && |
| sdata->u.mgd.probe_send_count > 0) { |
| if (ack) |
| ieee80211_sta_reset_conn_monitor(sdata); |
| else |
| sdata->u.mgd.nullfunc_failed = true; |
| ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
| return; |
| } |
| |
| if (ack) |
| ieee80211_sta_reset_conn_monitor(sdata); |
| } |
| |
| static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| const u8 *ssid; |
| u8 *dst = ifmgd->associated->bssid; |
| u8 unicast_limit = max(1, max_probe_tries - 3); |
| |
| /* |
| * 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 (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { |
| ifmgd->nullfunc_failed = false; |
| ieee80211_send_nullfunc(sdata->local, sdata, false); |
| } else { |
| int ssid_len; |
| |
| rcu_read_lock(); |
| ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); |
| if (WARN_ON_ONCE(ssid == NULL)) |
| ssid_len = 0; |
| else |
| ssid_len = ssid[1]; |
| |
| ieee80211_send_probe_req(sdata, sdata->vif.addr, dst, |
| ssid + 2, ssid_len, NULL, |
| 0, (u32) -1, true, 0, |
| ifmgd->associated->channel, false); |
| rcu_read_unlock(); |
| } |
| |
| 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; |
| |
| if (!ieee80211_sdata_running(sdata)) |
| return; |
| |
| sdata_lock(sdata); |
| |
| if (!ifmgd->associated) |
| goto out; |
| |
| mutex_lock(&sdata->local->mtx); |
| |
| if (sdata->local->tmp_channel || sdata->local->scanning) { |
| mutex_unlock(&sdata->local->mtx); |
| goto out; |
| } |
| |
| 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; |
| |
| mutex_unlock(&sdata->local->mtx); |
| |
| if (already) |
| goto out; |
| |
| mutex_lock(&sdata->local->iflist_mtx); |
| ieee80211_recalc_ps(sdata->local); |
| mutex_unlock(&sdata->local->iflist_mtx); |
| |
| ifmgd->probe_send_count = 0; |
| ieee80211_mgd_probe_ap_send(sdata); |
| out: |
| sdata_unlock(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 u8 *ssid; |
| int ssid_len; |
| |
| if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
| return NULL; |
| |
| sdata_assert_lock(sdata); |
| |
| if (ifmgd->associated) |
| cbss = ifmgd->associated; |
| else if (ifmgd->auth_data) |
| cbss = ifmgd->auth_data->bss; |
| else if (ifmgd->assoc_data) |
| cbss = ifmgd->assoc_data->bss; |
| else |
| return NULL; |
| |
| rcu_read_lock(); |
| ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); |
| if (WARN_ON_ONCE(ssid == NULL)) |
| ssid_len = 0; |
| else |
| ssid_len = ssid[1]; |
| |
| skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, |
| (u32) -1, cbss->channel, |
| ssid + 2, ssid_len, |
| NULL, 0, true); |
| 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) |
| { |
| 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); |
| 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]; |
| |
| sdata_lock(sdata); |
| if (!ifmgd->associated) { |
| sdata_unlock(sdata); |
| return; |
| } |
| |
| ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
| WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
| true, frame_buf); |
| mutex_lock(&local->mtx); |
| sdata->vif.csa_active = false; |
| ifmgd->csa_waiting_bcn = false; |
| if (sdata->csa_block_tx) { |
| ieee80211_wake_vif_queues(local, sdata, |
| IEEE80211_QUEUE_STOP_REASON_CSA); |
| sdata->csa_block_tx = false; |
| } |
| mutex_unlock(&local->mtx); |
| |
| ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, |
| WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); |
| |
| sdata_unlock(sdata); |
| } |
| |
| static void ieee80211_beacon_connection_loss_work(struct work_struct *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->associated) |
| ifmgd->beacon_loss_count++; |
| |
| if (ifmgd->connection_loss) { |
| sdata_info(sdata, "Connection to AP %pM lost\n", |
| ifmgd->bssid); |
| __ieee80211_disconnect(sdata); |
| } else { |
| ieee80211_mgd_probe_ap(sdata, true); |
| } |
| } |
| |
| static void ieee80211_csa_connection_drop_work(struct work_struct *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; |
| ieee80211_queue_work(hw, &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; |
| ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); |
| } |
| EXPORT_SYMBOL(ieee80211_connection_loss); |
| |
| |
| 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; |
| |
| sdata_assert_lock(sdata); |
| |
| 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->bss->bssid); |
| |
| eth_zero_addr(sdata->u.mgd.bssid); |
| ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); |
| sdata->u.mgd.flags = 0; |
| mutex_lock(&sdata->local->mtx); |
| ieee80211_vif_release_channel(sdata); |
| mutex_unlock(&sdata->local->mtx); |
| } |
| |
| cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); |
| kfree(auth_data); |
| sdata->u.mgd.auth_data = NULL; |
| } |
| |
| static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, |
| bool assoc) |
| { |
| struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; |
| |
| sdata_assert_lock(sdata); |
| |
| if (!assoc) { |
| /* |
| * 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->bss->bssid); |
| |
| eth_zero_addr(sdata->u.mgd.bssid); |
| ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); |
| sdata->u.mgd.flags = 0; |
| sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER; |
| mutex_lock(&sdata->local->mtx); |
| ieee80211_vif_release_channel(sdata); |
| mutex_unlock(&sdata->local->mtx); |
| } |
| |
| 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; |
| u8 *pos; |
| struct ieee802_11_elems elems; |
| u32 tx_flags = 0; |
| |
| pos = mgmt->u.auth.variable; |
| ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); |
| if (!elems.challenge) |
| return; |
| auth_data->expected_transaction = 4; |
| drv_mgd_prepare_tx(sdata->local, sdata); |
| 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, |
| elems.challenge - 2, elems.challenge_len + 2, |
| auth_data->bss->bssid, auth_data->bss->bssid, |
| auth_data->key, auth_data->key_len, |
| auth_data->key_idx, tx_flags); |
| } |
| |
| 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; |
| u8 bssid[ETH_ALEN]; |
| u16 auth_alg, auth_transaction, status_code; |
| struct sta_info *sta; |
| struct ieee80211_event event = { |
| .type = MLME_EVENT, |
| .u.mlme.data = AUTH_EVENT, |
| }; |
| |
| sdata_assert_lock(sdata); |
| |
| if (len < 24 + 6) |
| return; |
| |
| if (!ifmgd->auth_data || ifmgd->auth_data->done) |
| return; |
| |
| memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); |
| |
| if (!ether_addr_equal(bssid, 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_transaction != ifmgd->auth_data->expected_transaction) { |
| 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); |
| return; |
| } |
| |
| if (status_code != WLAN_STATUS_SUCCESS) { |
| sdata_info(sdata, "%pM denied authentication (status %d)\n", |
| mgmt->sa, status_code); |
| ieee80211_destroy_auth_data(sdata, false); |
| cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); |
| event.u.mlme.status = MLME_DENIED; |
| event.u.mlme.reason = status_code; |
| drv_event_callback(sdata->local, sdata, &event); |
| return; |
| } |
| |
| switch (ifmgd->auth_data->algorithm) { |
| case WLAN_AUTH_OPEN: |
| case WLAN_AUTH_LEAP: |
| case WLAN_AUTH_FT: |
| case WLAN_AUTH_SAE: |
| 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); |
| return; |
| } |
| |
| event.u.mlme.status = MLME_SUCCESS; |
| drv_event_callback(sdata->local, sdata, &event); |
| 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); |
| |
| if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && |
| ifmgd->auth_data->expected_transaction != 2) { |
| /* |
| * Report auth frame to user space for processing since another |
| * round of Authentication frames is still needed. |
| */ |
| cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); |
| return; |
| } |
| |
| /* move station state to auth */ |
| mutex_lock(&sdata->local->sta_mtx); |
| sta = sta_info_get(sdata, bssid); |
| if (!sta) { |
| WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); |
| goto out_err; |
| } |
| if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { |
| sdata_info(sdata, "failed moving %pM to auth\n", bssid); |
| goto out_err; |
| } |
| mutex_unlock(&sdata->local->sta_mtx); |
| |
| cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); |
| return; |
| out_err: |
| mutex_unlock(&sdata->local->sta_mtx); |
| /* ignore frame -- wait for timeout */ |
| } |
| |
| #define case_WLAN(type) \ |
| case WLAN_REASON_##type: return #type |
| |
| static 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); |
| |
| sdata_assert_lock(sdata); |
| |
| if (len < 24 + 2) |
| return; |
| |
| if (ifmgd->associated && |
| ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { |
| const u8 *bssid = ifmgd->associated->bssid; |
| |
| sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", |
| bssid, 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); |
| return; |
| } |
| |
| if (ifmgd->assoc_data && |
| ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { |
| const u8 *bssid = ifmgd->assoc_data->bss->bssid; |
| |
| sdata_info(sdata, |
| "deauthenticated from %pM while associating (Reason: %u=%s)\n", |
| bssid, reason_code, |
| ieee80211_get_reason_code_string(reason_code)); |
| |
| ieee80211_destroy_assoc_data(sdata, false); |
| |
| 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; |
| |
| sdata_assert_lock(sdata); |
| |
| if (len < 24 + 2) |
| return; |
| |
| if (!ifmgd->associated || |
| !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
| return; |
| |
| reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); |
| |
| sdata_info(sdata, "disassociated from %pM (Reason: %u)\n", |
| mgmt->sa, reason_code); |
| |
| ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
| |
| ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); |
| } |
| |
| 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 shift, u32 rate_flags) |
| { |
| 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 * (1 << shift)) > 110) |
| *have_higher_than_11mbit = true; |
| |
| /* |
| * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009 |
| * 7.3.2.2 as a magic value instead of a rate. Hence, skip it. |
| * |
| * Note: Even through the membership selector and the basic |
| * rate flag share the same bit, they are not exactly |
| * the same. |
| */ |
| if (!!(supp_rates[i] & 0x80) && |
| (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) |
| continue; |
| |
| for (j = 0; j < sband->n_bitrates; j++) { |
| struct ieee80211_rate *br; |
| int brate; |
| |
| br = &sband->bitrates[j]; |
| if ((rate_flags & br->flags) != rate_flags) |
| continue; |
| |
| brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 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_assoc_success(struct ieee80211_sub_if_data *sdata, |
| struct cfg80211_bss *cbss, |
| struct ieee80211_mgmt *mgmt, size_t len) |
| { |
| struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_supported_band *sband; |
| struct sta_info *sta; |
| u8 *pos; |
| u16 capab_info, aid; |
| struct ieee802_11_elems elems; |
| struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
| const struct cfg80211_bss_ies *bss_ies = NULL; |
| struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; |
| u32 changed = 0; |
| int err; |
| bool ret; |
| |
| /* AssocResp and ReassocResp have identical structure */ |
| |
| aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
| capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
| |
| if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
| sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", |
| aid); |
| aid &= ~(BIT(15) | BIT(14)); |
| |
| ifmgd->broken_ap = false; |
| |
| 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; |
| } |
| |
| pos = mgmt->u.assoc_resp.variable; |
| ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); |
| |
| if (!elems.supp_rates) { |
| sdata_info(sdata, "no SuppRates element in AssocResp\n"); |
| return false; |
| } |
| |
| ifmgd->aid = aid; |
| ifmgd->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 ((assoc_data->wmm && !elems.wmm_param) || |
| (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && |
| (!elems.ht_cap_elem || !elems.ht_operation)) || |
| (!(ifmgd->flags & IEEE80211_STA_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) |
| return false; |
| |
| ieee802_11_parse_elems(bss_ies->data, bss_ies->len, |
| false, &bss_elems); |
| 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 && |
| !(ifmgd->flags & IEEE80211_STA_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 && |
| !(ifmgd->flags & IEEE80211_STA_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 && |
| !(ifmgd->flags & IEEE80211_STA_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 && |
| !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { |
| elems.vht_operation = bss_elems.vht_operation; |
| sdata_info(sdata, |
| "AP bug: VHT operation missing from AssocResp\n"); |
| } |
| } |
| |
| /* |
| * We previously checked these in the beacon/probe response, so |
| * they should be present here. This is just a safety net. |
| */ |
| if (!(ifmgd->flags & IEEE80211_STA_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 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && |
| (!elems.vht_cap_elem || !elems.vht_operation)) { |
| sdata_info(sdata, |
| "VHT AP is missing VHT capability/operation\n"); |
| ret = false; |
| goto out; |
| } |
| |
| mutex_lock(&sdata->local->sta_mtx); |
| /* |
| * station info was already allocated and inserted before |
| * the association and should be available to us |
| */ |
| sta = sta_info_get(sdata, cbss->bssid); |
| if (WARN_ON(!sta)) { |
| mutex_unlock(&sdata->local->sta_mtx); |
| ret = false; |
| goto out; |
| } |
| |
| sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; |
| |
| /* Set up internal HT/VHT capabilities */ |
| if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) |
| ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
| elems.ht_cap_elem, sta); |
| |
| if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
| ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, |
| elems.vht_cap_elem, sta); |
| |
| /* |
| * 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; |
| sta->sta.rx_nss = nss; |
| } |
| |
| 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; |
| } |
| |
| sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; |
| |
| err = sta_info_move_state
|