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- /*
- * 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) {
- struct ieee80211_supported_band *sband = NULL;
- struct sta_info *mgd_sta = NULL;
- enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
- /*
- * 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;
- if (sdata->vif.bss_conf.chandef.width !=
- sdata->csa_chandef.width) {
- /*
- * For managed interface, we need to also update the AP
- * station bandwidth and align the rate scale algorithm
- * on the bandwidth change. Here we only consider the
- * bandwidth of the new channel definition (as channel
- * switch flow does not have the full HT/VHT/HE
- * information), assuming that if additional changes are
- * required they would be done as part of the processing
- * of the next beacon from the AP.
- */
- switch (sdata->csa_chandef.width) {
- case NL80211_CHAN_WIDTH_20_NOHT:
- case NL80211_CHAN_WIDTH_20:
- default:
- bw = IEEE80211_STA_RX_BW_20;
- break;
- case NL80211_CHAN_WIDTH_40:
- bw = IEEE80211_STA_RX_BW_40;
- break;
- case NL80211_CHAN_WIDTH_80:
- bw = IEEE80211_STA_RX_BW_80;
- break;
- case NL80211_CHAN_WIDTH_80P80:
- case NL80211_CHAN_WIDTH_160:
- bw = IEEE80211_STA_RX_BW_160;
- break;
- }
- mgd_sta = sta_info_get(sdata, ifmgd->bssid);
- sband =
- local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
- }
- if (sdata->vif.bss_conf.chandef.width >
- sdata->csa_chandef.width) {
- mgd_sta->sta.bandwidth = bw;
- rate_control_rate_update(local, sband, mgd_sta,
- IEEE80211_RC_BW_CHANGED);
- }
- 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;
- }
- if (sdata->vif.bss_conf.chandef.width <
- sdata->csa_chandef.width) {
- mgd_sta->sta.bandwidth = bw;
- rate_control_rate_update(local, sband, mgd_sta,
- IEEE80211_RC_BW_CHANGED);
- }
- 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 == 0 ||
- 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, bool abandon)
- {
- 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);
- if (abandon)
- cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
- }
- 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, true);
- 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(sta, IEEE80211_STA_ASSOC);
- if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
- err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
- if (err) {
- sdata_info(sdata,
- "failed to move station %pM to desired state\n",
- sta->sta.addr);
- WARN_ON(__sta_info_destroy(sta));
- mutex_unlock(&sdata->local->sta_mtx);
- ret = false;
- goto out;
- }
- mutex_unlock(&sdata->local->sta_mtx);
- /*
- * Always handle WMM once after association regardless
- * of the first value the AP uses. Setting -1 here has
- * that effect because the AP values is an unsigned
- * 4-bit value.
- */
- ifmgd->wmm_last_param_set = -1;
- if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
- ieee80211_set_wmm_default(sdata, false, false);
- } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
- elems.wmm_param_len)) {
- /* still enable QoS since we might have HT/VHT */
- ieee80211_set_wmm_default(sdata, false, true);
- /* set the disable-WMM flag in this case to disable
- * tracking WMM parameter changes in the beacon if
- * the parameters weren't actually valid. Doing so
- * avoids changing parameters very strangely when
- * the AP is going back and forth between valid and
- * invalid parameters.
- */
- ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
- }
- changed |= BSS_CHANGED_QOS;
- /* set AID and assoc capability,
- * ieee80211_set_associated() will tell the driver */
- bss_conf->aid = aid;
- bss_conf->assoc_capability = capab_info;
- ieee80211_set_associated(sdata, cbss, changed);
- /*
- * If we're using 4-addr mode, let the AP know that we're
- * doing so, so that it can create the STA VLAN on its side
- */
- if (ifmgd->use_4addr)
- ieee80211_send_4addr_nullfunc(local, sdata);
- /*
- * Start timer to probe the connection to the AP now.
- * Also start the timer that will detect beacon loss.
- */
- ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
- ieee80211_sta_reset_beacon_monitor(sdata);
- ret = true;
- out:
- kfree(bss_ies);
- return ret;
- }
- static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_mgmt *mgmt,
- size_t len)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
- u16 capab_info, status_code, aid;
- struct ieee802_11_elems elems;
- int ac, uapsd_queues = -1;
- u8 *pos;
- bool reassoc;
- struct cfg80211_bss *bss;
- struct ieee80211_event event = {
- .type = MLME_EVENT,
- .u.mlme.data = ASSOC_EVENT,
- };
- sdata_assert_lock(sdata);
- if (!assoc_data)
- return;
- if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
- return;
- /*
- * AssocResp and ReassocResp have identical structure, so process both
- * of them in this function.
- */
- if (len < 24 + 6)
- return;
- reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
- capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
- status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
- aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
- sdata_info(sdata,
- "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
- reassoc ? "Rea" : "A", mgmt->sa,
- capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
- pos = mgmt->u.assoc_resp.variable;
- ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
- if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
- elems.timeout_int &&
- elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
- u32 tu, ms;
- tu = le32_to_cpu(elems.timeout_int->value);
- ms = tu * 1024 / 1000;
- sdata_info(sdata,
- "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
- mgmt->sa, tu, ms);
- assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
- assoc_data->timeout_started = true;
- if (ms > IEEE80211_ASSOC_TIMEOUT)
- run_again(sdata, assoc_data->timeout);
- return;
- }
- bss = assoc_data->bss;
- if (status_code != WLAN_STATUS_SUCCESS) {
- sdata_info(sdata, "%pM denied association (code=%d)\n",
- mgmt->sa, status_code);
- ieee80211_destroy_assoc_data(sdata, false, false);
- event.u.mlme.status = MLME_DENIED;
- event.u.mlme.reason = status_code;
- drv_event_callback(sdata->local, sdata, &event);
- } else {
- if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
- /* oops -- internal error -- send timeout for now */
- ieee80211_destroy_assoc_data(sdata, false, false);
- cfg80211_assoc_timeout(sdata->dev, bss);
- return;
- }
- event.u.mlme.status = MLME_SUCCESS;
- drv_event_callback(sdata->local, sdata, &event);
- sdata_info(sdata, "associated\n");
- /*
- * destroy assoc_data afterwards, as otherwise an idle
- * recalc after assoc_data is NULL but before associated
- * is set can cause the interface to go idle
- */
- ieee80211_destroy_assoc_data(sdata, true, false);
- /* get uapsd queues configuration */
- uapsd_queues = 0;
- for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
- if (sdata->tx_conf[ac].uapsd)
- uapsd_queues |= BIT(ac);
- }
- cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
- }
- static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_mgmt *mgmt, size_t len,
- struct ieee80211_rx_status *rx_status,
- struct ieee802_11_elems *elems)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_bss *bss;
- struct ieee80211_channel *channel;
- sdata_assert_lock(sdata);
- channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
- if (!channel)
- return;
- bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
- channel);
- if (bss) {
- sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
- ieee80211_rx_bss_put(local, bss);
- }
- }
- static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
- struct sk_buff *skb)
- {
- struct ieee80211_mgmt *mgmt = (void *)skb->data;
- struct ieee80211_if_managed *ifmgd;
- struct ieee80211_rx_status *rx_status = (void *) skb->cb;
- size_t baselen, len = skb->len;
- struct ieee802_11_elems elems;
- ifmgd = &sdata->u.mgd;
- sdata_assert_lock(sdata);
- if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
- return; /* ignore ProbeResp to foreign address */
- baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
- if (baselen > len)
- return;
- ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
- false, &elems);
- ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
- if (ifmgd->associated &&
- ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
- ieee80211_reset_ap_probe(sdata);
- }
- /*
- * This is the canonical list of information elements we care about,
- * the filter code also gives us all changes to the Microsoft OUI
- * (00:50:F2) vendor IE which is used for WMM which we need to track,
- * as well as the DTPC IE (part of the Cisco OUI) used for signaling
- * changes to requested client power.
- *
- * We implement beacon filtering in software since that means we can
- * avoid processing the frame here and in cfg80211, and userspace
- * will not be able to tell whether the hardware supports it or not.
- *
- * XXX: This list needs to be dynamic -- userspace needs to be able to
- * add items it requires. It also needs to be able to tell us to
- * look out for other vendor IEs.
- */
- static const u64 care_about_ies =
- (1ULL << WLAN_EID_COUNTRY) |
- (1ULL << WLAN_EID_ERP_INFO) |
- (1ULL << WLAN_EID_CHANNEL_SWITCH) |
- (1ULL << WLAN_EID_PWR_CONSTRAINT) |
- (1ULL << WLAN_EID_HT_CAPABILITY) |
- (1ULL << WLAN_EID_HT_OPERATION) |
- (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
- static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_mgmt *mgmt, size_t len,
- struct ieee80211_rx_status *rx_status)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
- size_t baselen;
- struct ieee802_11_elems elems;
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_chanctx_conf *chanctx_conf;
- struct ieee80211_channel *chan;
- struct sta_info *sta;
- u32 changed = 0;
- bool erp_valid;
- u8 erp_value = 0;
- u32 ncrc;
- u8 *bssid;
- u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
- sdata_assert_lock(sdata);
- /* Process beacon from the current BSS */
- baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
- if (baselen > len)
- return;
- rcu_read_lock();
- chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
- if (!chanctx_conf) {
- rcu_read_unlock();
- return;
- }
- if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
- rcu_read_unlock();
- return;
- }
- chan = chanctx_conf->def.chan;
- rcu_read_unlock();
- if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
- ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
- ieee802_11_parse_elems(mgmt->u.beacon.variable,
- len - baselen, false, &elems);
- ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
- if (elems.tim && !elems.parse_error) {
- const struct ieee80211_tim_ie *tim_ie = elems.tim;
- ifmgd->dtim_period = tim_ie->dtim_period;
- }
- ifmgd->have_beacon = true;
- ifmgd->assoc_data->need_beacon = false;
- if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
- sdata->vif.bss_conf.sync_tsf =
- le64_to_cpu(mgmt->u.beacon.timestamp);
- sdata->vif.bss_conf.sync_device_ts =
- rx_status->device_timestamp;
- if (elems.tim)
- sdata->vif.bss_conf.sync_dtim_count =
- elems.tim->dtim_count;
- else
- sdata->vif.bss_conf.sync_dtim_count = 0;
- }
- /* continue assoc process */
- ifmgd->assoc_data->timeout = jiffies;
- ifmgd->assoc_data->timeout_started = true;
- run_again(sdata, ifmgd->assoc_data->timeout);
- return;
- }
- if (!ifmgd->associated ||
- !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
- return;
- bssid = ifmgd->associated->bssid;
- /* Track average RSSI from the Beacon frames of the current AP */
- if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
- ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
- ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
- ifmgd->last_cqm_event_signal = 0;
- ifmgd->count_beacon_signal = 1;
- ifmgd->last_ave_beacon_signal = 0;
- } else {
- ifmgd->count_beacon_signal++;
- }
- ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
- if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
- ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
- int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
- int last_sig = ifmgd->last_ave_beacon_signal;
- struct ieee80211_event event = {
- .type = RSSI_EVENT,
- };
- /*
- * if signal crosses either of the boundaries, invoke callback
- * with appropriate parameters
- */
- if (sig > ifmgd->rssi_max_thold &&
- (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
- ifmgd->last_ave_beacon_signal = sig;
- event.u.rssi.data = RSSI_EVENT_HIGH;
- drv_event_callback(local, sdata, &event);
- } else if (sig < ifmgd->rssi_min_thold &&
- (last_sig >= ifmgd->rssi_max_thold ||
- last_sig == 0)) {
- ifmgd->last_ave_beacon_signal = sig;
- event.u.rssi.data = RSSI_EVENT_LOW;
- drv_event_callback(local, sdata, &event);
- }
- }
- if (bss_conf->cqm_rssi_thold &&
- ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
- !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
- int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
- int last_event = ifmgd->last_cqm_event_signal;
- int thold = bss_conf->cqm_rssi_thold;
- int hyst = bss_conf->cqm_rssi_hyst;
- if (sig < thold &&
- (last_event == 0 || sig < last_event - hyst)) {
- ifmgd->last_cqm_event_signal = sig;
- ieee80211_cqm_rssi_notify(
- &sdata->vif,
- NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
- GFP_KERNEL);
- } else if (sig > thold &&
- (last_event == 0 || sig > last_event + hyst)) {
- ifmgd->last_cqm_event_signal = sig;
- ieee80211_cqm_rssi_notify(
- &sdata->vif,
- NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
- GFP_KERNEL);
- }
- }
- if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
- mlme_dbg_ratelimited(sdata,
- "cancelling AP probe due to a received beacon\n");
- ieee80211_reset_ap_probe(sdata);
- }
- /*
- * Push the beacon loss detection into the future since
- * we are processing a beacon from the AP just now.
- */
- ieee80211_sta_reset_beacon_monitor(sdata);
- ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
- ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
- len - baselen, false, &elems,
- care_about_ies, ncrc);
- if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
- ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
- if (local->hw.conf.dynamic_ps_timeout > 0) {
- if (local->hw.conf.flags & IEEE80211_CONF_PS) {
- local->hw.conf.flags &= ~IEEE80211_CONF_PS;
- ieee80211_hw_config(local,
- IEEE80211_CONF_CHANGE_PS);
- }
- ieee80211_send_nullfunc(local, sdata, false);
- } else if (!local->pspolling && sdata->u.mgd.powersave) {
- local->pspolling = true;
- /*
- * Here is assumed that the driver will be
- * able to send ps-poll frame and receive a
- * response even though power save mode is
- * enabled, but some drivers might require
- * to disable power save here. This needs
- * to be investigated.
- */
- ieee80211_send_pspoll(local, sdata);
- }
- }
- if (sdata->vif.p2p) {
- struct ieee80211_p2p_noa_attr noa = {};
- int ret;
- ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
- len - baselen,
- IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
- (u8 *) &noa, sizeof(noa));
- if (ret >= 2) {
- if (sdata->u.mgd.p2p_noa_index != noa.index) {
- /* valid noa_attr and index changed */
- sdata->u.mgd.p2p_noa_index = noa.index;
- memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
- changed |= BSS_CHANGED_P2P_PS;
- /*
- * make sure we update all information, the CRC
- * mechanism doesn't look at P2P attributes.
- */
- ifmgd->beacon_crc_valid = false;
- }
- } else if (sdata->u.mgd.p2p_noa_index != -1) {
- /* noa_attr not found and we had valid noa_attr before */
- sdata->u.mgd.p2p_noa_index = -1;
- memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
- changed |= BSS_CHANGED_P2P_PS;
- ifmgd->beacon_crc_valid = false;
- }
- }
- if (ifmgd->csa_waiting_bcn)
- ieee80211_chswitch_post_beacon(sdata);
- /*
- * Update beacon timing and dtim count on every beacon appearance. This
- * will allow the driver to use the most updated values. Do it before
- * comparing this one with last received beacon.
- * IMPORTANT: These parameters would possibly be out of sync by the time
- * the driver will use them. The synchronized view is currently
- * guaranteed only in certain callbacks.
- */
- if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
- sdata->vif.bss_conf.sync_tsf =
- le64_to_cpu(mgmt->u.beacon.timestamp);
- sdata->vif.bss_conf.sync_device_ts =
- rx_status->device_timestamp;
- if (elems.tim)
- sdata->vif.bss_conf.sync_dtim_count =
- elems.tim->dtim_count;
- else
- sdata->vif.bss_conf.sync_dtim_count = 0;
- }
- if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
- return;
- ifmgd->beacon_crc = ncrc;
- ifmgd->beacon_crc_valid = true;
- ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
- ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
- rx_status->device_timestamp,
- &elems, true);
- if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
- ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
- elems.wmm_param_len))
- changed |= BSS_CHANGED_QOS;
- /*
- * If we haven't had a beacon before, tell the driver about the
- * DTIM period (and beacon timing if desired) now.
- */
- if (!ifmgd->have_beacon) {
- /* a few bogus AP send dtim_period = 0 or no TIM IE */
- if (elems.tim)
- bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
- else
- bss_conf->dtim_period = 1;
- changed |= BSS_CHANGED_BEACON_INFO;
- ifmgd->have_beacon = true;
- mutex_lock(&local->iflist_mtx);
- ieee80211_recalc_ps(local);
- mutex_unlock(&local->iflist_mtx);
- ieee80211_recalc_ps_vif(sdata);
- }
- if (elems.erp_info) {
- erp_valid = true;
- erp_value = elems.erp_info[0];
- } else {
- erp_valid = false;
- }
- changed |= ieee80211_handle_bss_capability(sdata,
- le16_to_cpu(mgmt->u.beacon.capab_info),
- erp_valid, erp_value);
- mutex_lock(&local->sta_mtx);
- sta = sta_info_get(sdata, bssid);
- if (ieee80211_config_bw(sdata, sta,
- elems.ht_cap_elem, elems.ht_operation,
- elems.vht_operation, bssid, &changed)) {
- mutex_unlock(&local->sta_mtx);
- ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
- WLAN_REASON_DEAUTH_LEAVING,
- true, deauth_buf);
- ieee80211_report_disconnect(sdata, deauth_buf,
- sizeof(deauth_buf), true,
- WLAN_REASON_DEAUTH_LEAVING);
- return;
- }
- if (sta && elems.opmode_notif)
- ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
- rx_status->band);
- mutex_unlock(&local->sta_mtx);
- changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
- elems.country_elem,
- elems.country_elem_len,
- elems.pwr_constr_elem,
- elems.cisco_dtpc_elem);
- ieee80211_bss_info_change_notify(sdata, changed);
- }
- void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
- struct sk_buff *skb)
- {
- struct ieee80211_rx_status *rx_status;
- struct ieee80211_mgmt *mgmt;
- u16 fc;
- struct ieee802_11_elems elems;
- int ies_len;
- rx_status = (struct ieee80211_rx_status *) skb->cb;
- mgmt = (struct ieee80211_mgmt *) skb->data;
- fc = le16_to_cpu(mgmt->frame_control);
- sdata_lock(sdata);
- switch (fc & IEEE80211_FCTL_STYPE) {
- case IEEE80211_STYPE_BEACON:
- ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
- break;
- case IEEE80211_STYPE_PROBE_RESP:
- ieee80211_rx_mgmt_probe_resp(sdata, skb);
- break;
- case IEEE80211_STYPE_AUTH:
- ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
- break;
- case IEEE80211_STYPE_DEAUTH:
- ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
- break;
- case IEEE80211_STYPE_DISASSOC:
- ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
- break;
- case IEEE80211_STYPE_ASSOC_RESP:
- case IEEE80211_STYPE_REASSOC_RESP:
- ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
- break;
- case IEEE80211_STYPE_ACTION:
- if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
- ies_len = skb->len -
- offsetof(struct ieee80211_mgmt,
- u.action.u.chan_switch.variable);
- if (ies_len < 0)
- break;
- ieee802_11_parse_elems(
- mgmt->u.action.u.chan_switch.variable,
- ies_len, true, &elems);
- if (elems.parse_error)
- break;
- ieee80211_sta_process_chanswitch(sdata,
- rx_status->mactime,
- rx_status->device_timestamp,
- &elems, false);
- } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
- ies_len = skb->len -
- offsetof(struct ieee80211_mgmt,
- u.action.u.ext_chan_switch.variable);
- if (ies_len < 0)
- break;
- ieee802_11_parse_elems(
- mgmt->u.action.u.ext_chan_switch.variable,
- ies_len, true, &elems);
- if (elems.parse_error)
- break;
- /* for the handling code pretend this was also an IE */
- elems.ext_chansw_ie =
- &mgmt->u.action.u.ext_chan_switch.data;
- ieee80211_sta_process_chanswitch(sdata,
- rx_status->mactime,
- rx_status->device_timestamp,
- &elems, false);
- }
- break;
- }
- sdata_unlock(sdata);
- }
- static void ieee80211_sta_timer(unsigned long data)
- {
- struct ieee80211_sub_if_data *sdata =
- (struct ieee80211_sub_if_data *) data;
- ieee80211_queue_work(&sdata->local->hw, &sdata->work);
- }
- static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
- u8 *bssid, u8 reason, bool tx)
- {
- u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
- ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
- tx, frame_buf);
- ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
- reason);
- }
- static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
- u32 tx_flags = 0;
- u16 trans = 1;
- u16 status = 0;
- sdata_assert_lock(sdata);
- if (WARN_ON_ONCE(!auth_data))
- return -EINVAL;
- auth_data->tries++;
- if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
- sdata_info(sdata, "authentication with %pM timed out\n",
- auth_data->bss->bssid);
- /*
- * Most likely AP is not in the range so remove the
- * bss struct for that AP.
- */
- cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
- return -ETIMEDOUT;
- }
- drv_mgd_prepare_tx(local, sdata);
- sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
- auth_data->bss->bssid, auth_data->tries,
- IEEE80211_AUTH_MAX_TRIES);
- auth_data->expected_transaction = 2;
- if (auth_data->algorithm == WLAN_AUTH_SAE) {
- trans = auth_data->sae_trans;
- status = auth_data->sae_status;
- auth_data->expected_transaction = trans;
- }
- if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
- tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
- IEEE80211_TX_INTFL_MLME_CONN_TX;
- ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
- auth_data->data, auth_data->data_len,
- auth_data->bss->bssid,
- auth_data->bss->bssid, NULL, 0, 0,
- tx_flags);
- if (tx_flags == 0) {
- auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
- auth_data->timeout_started = true;
- run_again(sdata, auth_data->timeout);
- } else {
- auth_data->timeout =
- round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
- auth_data->timeout_started = true;
- run_again(sdata, auth_data->timeout);
- }
- return 0;
- }
- static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
- struct ieee80211_local *local = sdata->local;
- sdata_assert_lock(sdata);
- assoc_data->tries++;
- if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
- sdata_info(sdata, "association with %pM timed out\n",
- assoc_data->bss->bssid);
- /*
- * Most likely AP is not in the range so remove the
- * bss struct for that AP.
- */
- cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
- return -ETIMEDOUT;
- }
- sdata_info(sdata, "associate with %pM (try %d/%d)\n",
- assoc_data->bss->bssid, assoc_data->tries,
- IEEE80211_ASSOC_MAX_TRIES);
- ieee80211_send_assoc(sdata);
- if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
- assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
- assoc_data->timeout_started = true;
- run_again(sdata, assoc_data->timeout);
- } else {
- assoc_data->timeout =
- round_jiffies_up(jiffies +
- IEEE80211_ASSOC_TIMEOUT_LONG);
- assoc_data->timeout_started = true;
- run_again(sdata, assoc_data->timeout);
- }
- return 0;
- }
- void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
- __le16 fc, bool acked)
- {
- struct ieee80211_local *local = sdata->local;
- sdata->u.mgd.status_fc = fc;
- sdata->u.mgd.status_acked = acked;
- sdata->u.mgd.status_received = true;
- ieee80211_queue_work(&local->hw, &sdata->work);
- }
- void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- sdata_lock(sdata);
- if (ifmgd->status_received) {
- __le16 fc = ifmgd->status_fc;
- bool status_acked = ifmgd->status_acked;
- ifmgd->status_received = false;
- if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
- if (status_acked) {
- ifmgd->auth_data->timeout =
- jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
- run_again(sdata, ifmgd->auth_data->timeout);
- } else {
- ifmgd->auth_data->timeout = jiffies - 1;
- }
- ifmgd->auth_data->timeout_started = true;
- } else if (ifmgd->assoc_data &&
- (ieee80211_is_assoc_req(fc) ||
- ieee80211_is_reassoc_req(fc))) {
- if (status_acked) {
- ifmgd->assoc_data->timeout =
- jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
- run_again(sdata, ifmgd->assoc_data->timeout);
- } else {
- ifmgd->assoc_data->timeout = jiffies - 1;
- }
- ifmgd->assoc_data->timeout_started = true;
- }
- }
- if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
- time_after(jiffies, ifmgd->auth_data->timeout)) {
- if (ifmgd->auth_data->done) {
- /*
- * ok ... we waited for assoc but userspace didn't,
- * so let's just kill the auth data
- */
- ieee80211_destroy_auth_data(sdata, false);
- } else if (ieee80211_auth(sdata)) {
- u8 bssid[ETH_ALEN];
- struct ieee80211_event event = {
- .type = MLME_EVENT,
- .u.mlme.data = AUTH_EVENT,
- .u.mlme.status = MLME_TIMEOUT,
- };
- memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
- ieee80211_destroy_auth_data(sdata, false);
- cfg80211_auth_timeout(sdata->dev, bssid);
- drv_event_callback(sdata->local, sdata, &event);
- }
- } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
- run_again(sdata, ifmgd->auth_data->timeout);
- if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
- time_after(jiffies, ifmgd->assoc_data->timeout)) {
- if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
- ieee80211_do_assoc(sdata)) {
- struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
- struct ieee80211_event event = {
- .type = MLME_EVENT,
- .u.mlme.data = ASSOC_EVENT,
- .u.mlme.status = MLME_TIMEOUT,
- };
- ieee80211_destroy_assoc_data(sdata, false, false);
- cfg80211_assoc_timeout(sdata->dev, bss);
- drv_event_callback(sdata->local, sdata, &event);
- }
- } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
- run_again(sdata, ifmgd->assoc_data->timeout);
- if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
- ifmgd->associated) {
- u8 bssid[ETH_ALEN];
- int max_tries;
- memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
- if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
- max_tries = max_nullfunc_tries;
- else
- max_tries = max_probe_tries;
- /* ACK received for nullfunc probing frame */
- if (!ifmgd->probe_send_count)
- ieee80211_reset_ap_probe(sdata);
- else if (ifmgd->nullfunc_failed) {
- if (ifmgd->probe_send_count < max_tries) {
- mlme_dbg(sdata,
- "No ack for nullfunc frame to AP %pM, try %d/%i\n",
- bssid, ifmgd->probe_send_count,
- max_tries);
- ieee80211_mgd_probe_ap_send(sdata);
- } else {
- mlme_dbg(sdata,
- "No ack for nullfunc frame to AP %pM, disconnecting.\n",
- bssid);
- ieee80211_sta_connection_lost(sdata, bssid,
- WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
- false);
- }
- } else if (time_is_after_jiffies(ifmgd->probe_timeout))
- run_again(sdata, ifmgd->probe_timeout);
- else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
- mlme_dbg(sdata,
- "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
- bssid, probe_wait_ms);
- ieee80211_sta_connection_lost(sdata, bssid,
- WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
- } else if (ifmgd->probe_send_count < max_tries) {
- mlme_dbg(sdata,
- "No probe response from AP %pM after %dms, try %d/%i\n",
- bssid, probe_wait_ms,
- ifmgd->probe_send_count, max_tries);
- ieee80211_mgd_probe_ap_send(sdata);
- } else {
- /*
- * We actually lost the connection ... or did we?
- * Let's make sure!
- */
- wiphy_debug(local->hw.wiphy,
- "%s: No probe response from AP %pM"
- " after %dms, disconnecting.\n",
- sdata->name,
- bssid, probe_wait_ms);
- ieee80211_sta_connection_lost(sdata, bssid,
- WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
- }
- }
- sdata_unlock(sdata);
- }
- static void ieee80211_sta_bcn_mon_timer(unsigned long data)
- {
- struct ieee80211_sub_if_data *sdata =
- (struct ieee80211_sub_if_data *) data;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
- return;
- sdata->u.mgd.connection_loss = false;
- ieee80211_queue_work(&sdata->local->hw,
- &sdata->u.mgd.beacon_connection_loss_work);
- }
- static void ieee80211_sta_conn_mon_timer(unsigned long data)
- {
- struct ieee80211_sub_if_data *sdata =
- (struct ieee80211_sub_if_data *) data;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_local *local = sdata->local;
- if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
- return;
- ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
- }
- static void ieee80211_sta_monitor_work(struct work_struct *work)
- {
- struct ieee80211_sub_if_data *sdata =
- container_of(work, struct ieee80211_sub_if_data,
- u.mgd.monitor_work);
- ieee80211_mgd_probe_ap(sdata, false);
- }
- static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
- {
- if (sdata->vif.type == NL80211_IFTYPE_STATION) {
- __ieee80211_stop_poll(sdata);
- /* let's probe the connection once */
- if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
- ieee80211_queue_work(&sdata->local->hw,
- &sdata->u.mgd.monitor_work);
- }
- }
- #ifdef CONFIG_PM
- void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
- sdata_lock(sdata);
- if (ifmgd->auth_data || ifmgd->assoc_data) {
- const u8 *bssid = ifmgd->auth_data ?
- ifmgd->auth_data->bss->bssid :
- ifmgd->assoc_data->bss->bssid;
- /*
- * If we are trying to authenticate / associate while suspending,
- * cfg80211 won't know and won't actually abort those attempts,
- * thus we need to do that ourselves.
- */
- ieee80211_send_deauth_disassoc(sdata, bssid,
- IEEE80211_STYPE_DEAUTH,
- WLAN_REASON_DEAUTH_LEAVING,
- false, frame_buf);
- if (ifmgd->assoc_data)
- ieee80211_destroy_assoc_data(sdata, false, true);
- if (ifmgd->auth_data)
- ieee80211_destroy_auth_data(sdata, false);
- cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
- IEEE80211_DEAUTH_FRAME_LEN);
- }
- /* This is a bit of a hack - we should find a better and more generic
- * solution to this. Normally when suspending, cfg80211 will in fact
- * deauthenticate. However, it doesn't (and cannot) stop an ongoing
- * auth (not so important) or assoc (this is the problem) process.
- *
- * As a consequence, it can happen that we are in the process of both
- * associating and suspending, and receive an association response
- * after cfg80211 has checked if it needs to disconnect, but before
- * we actually set the flag to drop incoming frames. This will then
- * cause the workqueue flush to process the association response in
- * the suspend, resulting in a successful association just before it
- * tries to remove the interface from the driver, which now though
- * has a channel context assigned ... this results in issues.
- *
- * To work around this (for now) simply deauth here again if we're
- * now connected.
- */
- if (ifmgd->associated && !sdata->local->wowlan) {
- u8 bssid[ETH_ALEN];
- struct cfg80211_deauth_request req = {
- .reason_code = WLAN_REASON_DEAUTH_LEAVING,
- .bssid = bssid,
- };
- memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
- ieee80211_mgd_deauth(sdata, &req);
- }
- sdata_unlock(sdata);
- }
- void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- sdata_lock(sdata);
- if (!ifmgd->associated) {
- sdata_unlock(sdata);
- return;
- }
- if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
- sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
- mlme_dbg(sdata, "driver requested disconnect after resume\n");
- ieee80211_sta_connection_lost(sdata,
- ifmgd->associated->bssid,
- WLAN_REASON_UNSPECIFIED,
- true);
- sdata_unlock(sdata);
- return;
- }
- sdata_unlock(sdata);
- }
- #endif
- /* interface setup */
- void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_if_managed *ifmgd;
- ifmgd = &sdata->u.mgd;
- INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
- INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
- INIT_WORK(&ifmgd->beacon_connection_loss_work,
- ieee80211_beacon_connection_loss_work);
- INIT_WORK(&ifmgd->csa_connection_drop_work,
- ieee80211_csa_connection_drop_work);
- INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
- INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
- ieee80211_tdls_peer_del_work);
- setup_timer(&ifmgd->timer, ieee80211_sta_timer,
- (unsigned long) sdata);
- setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
- (unsigned long) sdata);
- setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
- (unsigned long) sdata);
- setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
- (unsigned long) sdata);
- INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
- ieee80211_sta_handle_tspec_ac_params_wk);
- ifmgd->flags = 0;
- ifmgd->powersave = sdata->wdev.ps;
- ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
- ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
- ifmgd->p2p_noa_index = -1;
- if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
- ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
- else
- ifmgd->req_smps = IEEE80211_SMPS_OFF;
- /* Setup TDLS data */
- spin_lock_init(&ifmgd->teardown_lock);
- ifmgd->teardown_skb = NULL;
- ifmgd->orig_teardown_skb = NULL;
- }
- /* scan finished notification */
- void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
- {
- struct ieee80211_sub_if_data *sdata;
- /* Restart STA timers */
- rcu_read_lock();
- list_for_each_entry_rcu(sdata, &local->interfaces, list) {
- if (ieee80211_sdata_running(sdata))
- ieee80211_restart_sta_timer(sdata);
- }
- rcu_read_unlock();
- }
- static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_bss *cbss)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- const u8 *ht_cap_ie, *vht_cap_ie;
- const struct ieee80211_ht_cap *ht_cap;
- const struct ieee80211_vht_cap *vht_cap;
- u8 chains = 1;
- if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
- return chains;
- ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
- if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
- ht_cap = (void *)(ht_cap_ie + 2);
- chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
- /*
- * TODO: use "Tx Maximum Number Spatial Streams Supported" and
- * "Tx Unequal Modulation Supported" fields.
- */
- }
- if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
- return chains;
- vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
- if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
- u8 nss;
- u16 tx_mcs_map;
- vht_cap = (void *)(vht_cap_ie + 2);
- tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
- for (nss = 8; nss > 0; nss--) {
- if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
- IEEE80211_VHT_MCS_NOT_SUPPORTED)
- break;
- }
- /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
- chains = max(chains, nss);
- }
- return chains;
- }
- static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_bss *cbss)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- const struct ieee80211_ht_cap *ht_cap = NULL;
- const struct ieee80211_ht_operation *ht_oper = NULL;
- const struct ieee80211_vht_operation *vht_oper = NULL;
- struct ieee80211_supported_band *sband;
- struct cfg80211_chan_def chandef;
- int ret;
- u32 i;
- bool have_80mhz;
- sband = local->hw.wiphy->bands[cbss->channel->band];
- ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
- IEEE80211_STA_DISABLE_80P80MHZ |
- IEEE80211_STA_DISABLE_160MHZ);
- rcu_read_lock();
- if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
- sband->ht_cap.ht_supported) {
- const u8 *ht_oper_ie, *ht_cap_ie;
- ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
- if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
- ht_oper = (void *)(ht_oper_ie + 2);
- ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
- if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
- ht_cap = (void *)(ht_cap_ie + 2);
- if (!ht_cap) {
- ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
- ht_oper = NULL;
- }
- }
- if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
- sband->vht_cap.vht_supported) {
- const u8 *vht_oper_ie, *vht_cap;
- vht_oper_ie = ieee80211_bss_get_ie(cbss,
- WLAN_EID_VHT_OPERATION);
- if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
- vht_oper = (void *)(vht_oper_ie + 2);
- if (vht_oper && !ht_oper) {
- vht_oper = NULL;
- sdata_info(sdata,
- "AP advertised VHT without HT, disabling both\n");
- ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
- ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
- }
- vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
- if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
- ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
- vht_oper = NULL;
- }
- }
- /* Allow VHT if at least one channel on the sband supports 80 MHz */
- have_80mhz = false;
- for (i = 0; i < sband->n_channels; i++) {
- if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
- IEEE80211_CHAN_NO_80MHZ))
- continue;
- have_80mhz = true;
- break;
- }
- if (!have_80mhz)
- ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
- ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
- cbss->channel,
- ht_cap, ht_oper, vht_oper,
- &chandef, false);
- sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
- local->rx_chains);
- rcu_read_unlock();
- /* will change later if needed */
- sdata->smps_mode = IEEE80211_SMPS_OFF;
- mutex_lock(&local->mtx);
- /*
- * If this fails (possibly due to channel context sharing
- * on incompatible channels, e.g. 80+80 and 160 sharing the
- * same control channel) try to use a smaller bandwidth.
- */
- ret = ieee80211_vif_use_channel(sdata, &chandef,
- IEEE80211_CHANCTX_SHARED);
- /* don't downgrade for 5 and 10 MHz channels, though. */
- if (chandef.width == NL80211_CHAN_WIDTH_5 ||
- chandef.width == NL80211_CHAN_WIDTH_10)
- goto out;
- while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
- ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
- ret = ieee80211_vif_use_channel(sdata, &chandef,
- IEEE80211_CHANCTX_SHARED);
- }
- out:
- mutex_unlock(&local->mtx);
- return ret;
- }
- static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_bss *cbss, bool assoc,
- bool override)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_bss *bss = (void *)cbss->priv;
- struct sta_info *new_sta = NULL;
- struct ieee80211_supported_band *sband;
- bool have_sta = false;
- int err;
- sband = local->hw.wiphy->bands[cbss->channel->band];
- if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
- return -EINVAL;
- /* If a reconfig is happening, bail out */
- if (local->in_reconfig)
- return -EBUSY;
- if (assoc) {
- rcu_read_lock();
- have_sta = sta_info_get(sdata, cbss->bssid);
- rcu_read_unlock();
- }
- if (!have_sta) {
- new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
- if (!new_sta)
- return -ENOMEM;
- }
- if (new_sta || override) {
- err = ieee80211_prep_channel(sdata, cbss);
- if (err) {
- if (new_sta)
- sta_info_free(local, new_sta);
- return -EINVAL;
- }
- }
- if (new_sta) {
- u32 rates = 0, basic_rates = 0;
- bool have_higher_than_11mbit;
- int min_rate = INT_MAX, min_rate_index = -1;
- struct ieee80211_chanctx_conf *chanctx_conf;
- const struct cfg80211_bss_ies *ies;
- int shift = ieee80211_vif_get_shift(&sdata->vif);
- u32 rate_flags;
- rcu_read_lock();
- chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
- if (WARN_ON(!chanctx_conf)) {
- rcu_read_unlock();
- sta_info_free(local, new_sta);
- return -EINVAL;
- }
- rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
- rcu_read_unlock();
- ieee80211_get_rates(sband, bss->supp_rates,
- bss->supp_rates_len,
- &rates, &basic_rates,
- &have_higher_than_11mbit,
- &min_rate, &min_rate_index,
- shift, rate_flags);
- /*
- * This used to be a workaround for basic rates missing
- * in the association response frame. Now that we no
- * longer use the basic rates from there, it probably
- * doesn't happen any more, but keep the workaround so
- * in case some *other* APs are buggy in different ways
- * we can connect -- with a warning.
- */
- if (!basic_rates && min_rate_index >= 0) {
- sdata_info(sdata,
- "No basic rates, using min rate instead\n");
- basic_rates = BIT(min_rate_index);
- }
- new_sta->sta.supp_rates[cbss->channel->band] = rates;
- sdata->vif.bss_conf.basic_rates = basic_rates;
- /* cf. IEEE 802.11 9.2.12 */
- if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
- have_higher_than_11mbit)
- sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
- else
- sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
- memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
- /* set timing information */
- sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
- rcu_read_lock();
- ies = rcu_dereference(cbss->beacon_ies);
- if (ies) {
- const u8 *tim_ie;
- sdata->vif.bss_conf.sync_tsf = ies->tsf;
- sdata->vif.bss_conf.sync_device_ts =
- bss->device_ts_beacon;
- tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
- ies->data, ies->len);
- if (tim_ie && tim_ie[1] >= 2)
- sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
- else
- sdata->vif.bss_conf.sync_dtim_count = 0;
- } else if (!ieee80211_hw_check(&sdata->local->hw,
- TIMING_BEACON_ONLY)) {
- ies = rcu_dereference(cbss->proberesp_ies);
- /* must be non-NULL since beacon IEs were NULL */
- sdata->vif.bss_conf.sync_tsf = ies->tsf;
- sdata->vif.bss_conf.sync_device_ts =
- bss->device_ts_presp;
- sdata->vif.bss_conf.sync_dtim_count = 0;
- } else {
- sdata->vif.bss_conf.sync_tsf = 0;
- sdata->vif.bss_conf.sync_device_ts = 0;
- sdata->vif.bss_conf.sync_dtim_count = 0;
- }
- rcu_read_unlock();
- /* tell driver about BSSID, basic rates and timing */
- ieee80211_bss_info_change_notify(sdata,
- BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
- BSS_CHANGED_BEACON_INT);
- if (assoc)
- sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
- err = sta_info_insert(new_sta);
- new_sta = NULL;
- if (err) {
- sdata_info(sdata,
- "failed to insert STA entry for the AP (error %d)\n",
- err);
- return err;
- }
- } else
- WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
- /* Cancel scan to ensure that nothing interferes with connection */
- if (local->scanning)
- ieee80211_scan_cancel(local);
- return 0;
- }
- /* config hooks */
- int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_auth_request *req)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_mgd_auth_data *auth_data;
- u16 auth_alg;
- int err;
- /* prepare auth data structure */
- switch (req->auth_type) {
- case NL80211_AUTHTYPE_OPEN_SYSTEM:
- auth_alg = WLAN_AUTH_OPEN;
- break;
- case NL80211_AUTHTYPE_SHARED_KEY:
- if (IS_ERR(local->wep_tx_tfm))
- return -EOPNOTSUPP;
- auth_alg = WLAN_AUTH_SHARED_KEY;
- break;
- case NL80211_AUTHTYPE_FT:
- auth_alg = WLAN_AUTH_FT;
- break;
- case NL80211_AUTHTYPE_NETWORK_EAP:
- auth_alg = WLAN_AUTH_LEAP;
- break;
- case NL80211_AUTHTYPE_SAE:
- auth_alg = WLAN_AUTH_SAE;
- break;
- default:
- return -EOPNOTSUPP;
- }
- auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
- req->ie_len, GFP_KERNEL);
- if (!auth_data)
- return -ENOMEM;
- auth_data->bss = req->bss;
- if (req->sae_data_len >= 4) {
- __le16 *pos = (__le16 *) req->sae_data;
- auth_data->sae_trans = le16_to_cpu(pos[0]);
- auth_data->sae_status = le16_to_cpu(pos[1]);
- memcpy(auth_data->data, req->sae_data + 4,
- req->sae_data_len - 4);
- auth_data->data_len += req->sae_data_len - 4;
- }
- if (req->ie && req->ie_len) {
- memcpy(&auth_data->data[auth_data->data_len],
- req->ie, req->ie_len);
- auth_data->data_len += req->ie_len;
- }
- if (req->key && req->key_len) {
- auth_data->key_len = req->key_len;
- auth_data->key_idx = req->key_idx;
- memcpy(auth_data->key, req->key, req->key_len);
- }
- auth_data->algorithm = auth_alg;
- /* try to authenticate/probe */
- if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
- ifmgd->assoc_data) {
- err = -EBUSY;
- goto err_free;
- }
- if (ifmgd->auth_data)
- ieee80211_destroy_auth_data(sdata, false);
- /* prep auth_data so we don't go into idle on disassoc */
- ifmgd->auth_data = auth_data;
- if (ifmgd->associated) {
- u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
- ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
- WLAN_REASON_UNSPECIFIED,
- false, frame_buf);
- ieee80211_report_disconnect(sdata, frame_buf,
- sizeof(frame_buf), true,
- WLAN_REASON_UNSPECIFIED);
- }
- sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
- err = ieee80211_prep_connection(sdata, req->bss, false, false);
- if (err)
- goto err_clear;
- err = ieee80211_auth(sdata);
- if (err) {
- sta_info_destroy_addr(sdata, req->bss->bssid);
- goto err_clear;
- }
- /* hold our own reference */
- cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
- return 0;
- err_clear:
- eth_zero_addr(ifmgd->bssid);
- ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
- ifmgd->auth_data = NULL;
- mutex_lock(&sdata->local->mtx);
- ieee80211_vif_release_channel(sdata);
- mutex_unlock(&sdata->local->mtx);
- err_free:
- kfree(auth_data);
- return err;
- }
- int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_assoc_request *req)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- struct ieee80211_bss *bss = (void *)req->bss->priv;
- struct ieee80211_mgd_assoc_data *assoc_data;
- const struct cfg80211_bss_ies *beacon_ies;
- struct ieee80211_supported_band *sband;
- const u8 *ssidie, *ht_ie, *vht_ie;
- int i, err;
- bool override = false;
- assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
- if (!assoc_data)
- return -ENOMEM;
- rcu_read_lock();
- ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
- if (!ssidie) {
- rcu_read_unlock();
- kfree(assoc_data);
- return -EINVAL;
- }
- memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
- assoc_data->ssid_len = ssidie[1];
- rcu_read_unlock();
- if (ifmgd->associated) {
- u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
- ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
- WLAN_REASON_UNSPECIFIED,
- false, frame_buf);
- ieee80211_report_disconnect(sdata, frame_buf,
- sizeof(frame_buf), true,
- WLAN_REASON_UNSPECIFIED);
- }
- if (ifmgd->auth_data && !ifmgd->auth_data->done) {
- err = -EBUSY;
- goto err_free;
- }
- if (ifmgd->assoc_data) {
- err = -EBUSY;
- goto err_free;
- }
- if (ifmgd->auth_data) {
- bool match;
- /* keep sta info, bssid if matching */
- match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
- ieee80211_destroy_auth_data(sdata, match);
- }
- /* prepare assoc data */
- ifmgd->beacon_crc_valid = false;
- assoc_data->wmm = bss->wmm_used &&
- (local->hw.queues >= IEEE80211_NUM_ACS);
- /*
- * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
- * We still associate in non-HT mode (11a/b/g) if any one of these
- * ciphers is configured as pairwise.
- * We can set this to true for non-11n hardware, that'll be checked
- * separately along with the peer capabilities.
- */
- for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
- if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
- req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
- req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
- ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
- ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
- netdev_info(sdata->dev,
- "disabling HT/VHT due to WEP/TKIP use\n");
- }
- }
- /* Also disable HT if we don't support it or the AP doesn't use WMM */
- sband = local->hw.wiphy->bands[req->bss->channel->band];
- if (!sband->ht_cap.ht_supported ||
- local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
- ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
- ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
- if (!bss->wmm_used &&
- !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
- netdev_info(sdata->dev,
- "disabling HT as WMM/QoS is not supported by the AP\n");
- }
- /* disable VHT if we don't support it or the AP doesn't use WMM */
- if (!sband->vht_cap.vht_supported ||
- local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
- ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
- ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
- if (!bss->wmm_used &&
- !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
- netdev_info(sdata->dev,
- "disabling VHT as WMM/QoS is not supported by the AP\n");
- }
- memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
- memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
- sizeof(ifmgd->ht_capa_mask));
- memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
- memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
- sizeof(ifmgd->vht_capa_mask));
- if (req->ie && req->ie_len) {
- memcpy(assoc_data->ie, req->ie, req->ie_len);
- assoc_data->ie_len = req->ie_len;
- }
- assoc_data->bss = req->bss;
- if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
- if (ifmgd->powersave)
- sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
- else
- sdata->smps_mode = IEEE80211_SMPS_OFF;
- } else
- sdata->smps_mode = ifmgd->req_smps;
- assoc_data->capability = req->bss->capability;
- assoc_data->supp_rates = bss->supp_rates;
- assoc_data->supp_rates_len = bss->supp_rates_len;
- rcu_read_lock();
- ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
- if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
- assoc_data->ap_ht_param =
- ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
- else
- ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
- vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
- if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
- memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
- sizeof(struct ieee80211_vht_cap));
- else
- ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
- rcu_read_unlock();
- if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
- ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
- "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
- sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
- if (bss->wmm_used && bss->uapsd_supported &&
- (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
- assoc_data->uapsd = true;
- ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
- } else {
- assoc_data->uapsd = false;
- ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
- }
- if (req->prev_bssid)
- memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
- if (req->use_mfp) {
- ifmgd->mfp = IEEE80211_MFP_REQUIRED;
- ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
- } else {
- ifmgd->mfp = IEEE80211_MFP_DISABLED;
- ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
- }
- if (req->flags & ASSOC_REQ_USE_RRM)
- ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
- else
- ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
- if (req->crypto.control_port)
- ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
- else
- ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
- sdata->control_port_protocol = req->crypto.control_port_ethertype;
- sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
- sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
- sdata->vif.type);
- /* kick off associate process */
- ifmgd->assoc_data = assoc_data;
- ifmgd->dtim_period = 0;
- ifmgd->have_beacon = false;
- /* override HT/VHT configuration only if the AP and we support it */
- if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
- struct ieee80211_sta_ht_cap sta_ht_cap;
- if (req->flags & ASSOC_REQ_DISABLE_HT)
- override = true;
- memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
- ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
- /* check for 40 MHz disable override */
- if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
- sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
- !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
- override = true;
- if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
- req->flags & ASSOC_REQ_DISABLE_VHT)
- override = true;
- }
- if (req->flags & ASSOC_REQ_DISABLE_HT) {
- ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
- ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
- }
- if (req->flags & ASSOC_REQ_DISABLE_VHT)
- ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
- err = ieee80211_prep_connection(sdata, req->bss, true, override);
- if (err)
- goto err_clear;
- rcu_read_lock();
- beacon_ies = rcu_dereference(req->bss->beacon_ies);
- if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
- !beacon_ies) {
- /*
- * Wait up to one beacon interval ...
- * should this be more if we miss one?
- */
- sdata_info(sdata, "waiting for beacon from %pM\n",
- ifmgd->bssid);
- assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
- assoc_data->timeout_started = true;
- assoc_data->need_beacon = true;
- } else if (beacon_ies) {
- const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
- beacon_ies->data,
- beacon_ies->len);
- u8 dtim_count = 0;
- if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
- const struct ieee80211_tim_ie *tim;
- tim = (void *)(tim_ie + 2);
- ifmgd->dtim_period = tim->dtim_period;
- dtim_count = tim->dtim_count;
- }
- ifmgd->have_beacon = true;
- assoc_data->timeout = jiffies;
- assoc_data->timeout_started = true;
- if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
- sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
- sdata->vif.bss_conf.sync_device_ts =
- bss->device_ts_beacon;
- sdata->vif.bss_conf.sync_dtim_count = dtim_count;
- }
- } else {
- assoc_data->timeout = jiffies;
- assoc_data->timeout_started = true;
- }
- rcu_read_unlock();
- run_again(sdata, assoc_data->timeout);
- if (bss->corrupt_data) {
- char *corrupt_type = "data";
- if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
- if (bss->corrupt_data &
- IEEE80211_BSS_CORRUPT_PROBE_RESP)
- corrupt_type = "beacon and probe response";
- else
- corrupt_type = "beacon";
- } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
- corrupt_type = "probe response";
- sdata_info(sdata, "associating with AP with corrupt %s\n",
- corrupt_type);
- }
- return 0;
- err_clear:
- eth_zero_addr(ifmgd->bssid);
- ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
- ifmgd->assoc_data = NULL;
- err_free:
- kfree(assoc_data);
- return err;
- }
- int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_deauth_request *req)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
- bool tx = !req->local_state_change;
- if (ifmgd->auth_data &&
- ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
- sdata_info(sdata,
- "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
- req->bssid, req->reason_code,
- ieee80211_get_reason_code_string(req->reason_code));
- drv_mgd_prepare_tx(sdata->local, sdata);
- ieee80211_send_deauth_disassoc(sdata, req->bssid,
- IEEE80211_STYPE_DEAUTH,
- req->reason_code, tx,
- frame_buf);
- ieee80211_destroy_auth_data(sdata, false);
- ieee80211_report_disconnect(sdata, frame_buf,
- sizeof(frame_buf), true,
- req->reason_code);
- return 0;
- }
- if (ifmgd->assoc_data &&
- ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
- sdata_info(sdata,
- "aborting association with %pM by local choice (Reason: %u=%s)\n",
- req->bssid, req->reason_code,
- ieee80211_get_reason_code_string(req->reason_code));
- drv_mgd_prepare_tx(sdata->local, sdata);
- ieee80211_send_deauth_disassoc(sdata, req->bssid,
- IEEE80211_STYPE_DEAUTH,
- req->reason_code, tx,
- frame_buf);
- ieee80211_destroy_assoc_data(sdata, false, true);
- ieee80211_report_disconnect(sdata, frame_buf,
- sizeof(frame_buf), true,
- req->reason_code);
- return 0;
- }
- if (ifmgd->associated &&
- ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
- sdata_info(sdata,
- "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
- req->bssid, req->reason_code,
- ieee80211_get_reason_code_string(req->reason_code));
- ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
- req->reason_code, tx, frame_buf);
- ieee80211_report_disconnect(sdata, frame_buf,
- sizeof(frame_buf), true,
- req->reason_code);
- return 0;
- }
- return -ENOTCONN;
- }
- int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_disassoc_request *req)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- u8 bssid[ETH_ALEN];
- u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
- /*
- * cfg80211 should catch this ... but it's racy since
- * we can receive a disassoc frame, process it, hand it
- * to cfg80211 while that's in a locked section already
- * trying to tell us that the user wants to disconnect.
- */
- if (ifmgd->associated != req->bss)
- return -ENOLINK;
- sdata_info(sdata,
- "disassociating from %pM by local choice (Reason: %u=%s)\n",
- req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
- memcpy(bssid, req->bss->bssid, ETH_ALEN);
- ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
- req->reason_code, !req->local_state_change,
- frame_buf);
- ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
- req->reason_code);
- return 0;
- }
- void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
- /*
- * Make sure some work items will not run after this,
- * they will not do anything but might not have been
- * cancelled when disconnecting.
- */
- cancel_work_sync(&ifmgd->monitor_work);
- cancel_work_sync(&ifmgd->beacon_connection_loss_work);
- cancel_work_sync(&ifmgd->request_smps_work);
- cancel_work_sync(&ifmgd->csa_connection_drop_work);
- cancel_work_sync(&ifmgd->chswitch_work);
- cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
- sdata_lock(sdata);
- if (ifmgd->assoc_data) {
- struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
- ieee80211_destroy_assoc_data(sdata, false, false);
- cfg80211_assoc_timeout(sdata->dev, bss);
- }
- if (ifmgd->auth_data)
- ieee80211_destroy_auth_data(sdata, false);
- spin_lock_bh(&ifmgd->teardown_lock);
- if (ifmgd->teardown_skb) {
- kfree_skb(ifmgd->teardown_skb);
- ifmgd->teardown_skb = NULL;
- ifmgd->orig_teardown_skb = NULL;
- }
- spin_unlock_bh(&ifmgd->teardown_lock);
- del_timer_sync(&ifmgd->timer);
- sdata_unlock(sdata);
- }
- void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
- enum nl80211_cqm_rssi_threshold_event rssi_event,
- gfp_t gfp)
- {
- struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
- trace_api_cqm_rssi_notify(sdata, rssi_event);
- cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
- }
- EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
- void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
- {
- struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
- trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
- cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
- }
- EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
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