mlme.c 172.3 KB
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// SPDX-License-Identifier: GPL-2.0-only
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/*
 * BSS client mode implementation
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 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
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 * 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>
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 * Copyright 2013-2014  Intel Mobile Communications GmbH
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 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
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 * Copyright (C) 2018 - 2021 Intel Corporation
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 */

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#include <linux/delay.h>
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#include <linux/fips.h>
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#include <linux/if_ether.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
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#include <linux/moduleparam.h>
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#include <linux/rtnetlink.h>
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#include <linux/crc32.h>
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#include <linux/slab.h>
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#include <linux/export.h>
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#include <net/mac80211.h>
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#include <asm/unaligned.h>
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#include "ieee80211_i.h"
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#include "driver-ops.h"
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#include "rate.h"
#include "led.h"
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#include "fils_aead.h"
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#define IEEE80211_AUTH_TIMEOUT		(HZ / 5)
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#define IEEE80211_AUTH_TIMEOUT_LONG	(HZ / 2)
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#define IEEE80211_AUTH_TIMEOUT_SHORT	(HZ / 10)
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#define IEEE80211_AUTH_TIMEOUT_SAE	(HZ * 2)
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#define IEEE80211_AUTH_MAX_TRIES	3
#define IEEE80211_AUTH_WAIT_ASSOC	(HZ * 5)
#define IEEE80211_ASSOC_TIMEOUT		(HZ / 5)
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#define IEEE80211_ASSOC_TIMEOUT_LONG	(HZ / 2)
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#define IEEE80211_ASSOC_TIMEOUT_SHORT	(HZ / 10)
#define IEEE80211_ASSOC_MAX_TRIES	3
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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).");
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/*
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 * 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.
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 */
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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.");
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/*
 * Time the connection can be idle before we probe
 * it to see if we can still talk to the AP.
 */
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#define IEEE80211_CONNECTION_IDLE_TIME	(30 * HZ)
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/*
 * Time we wait for a probe response after sending
 * a probe request because of beacon loss or for
 * checking the connection still works.
 */
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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).");
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/*
 * 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

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/*
 * 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.
 */
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static void run_again(struct ieee80211_sub_if_data *sdata,
		      unsigned long timeout)
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{
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	sdata_assert_lock(sdata);
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	if (!timer_pending(&sdata->u.mgd.timer) ||
	    time_before(timeout, sdata->u.mgd.timer.expires))
		mod_timer(&sdata->u.mgd.timer, timeout);
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}

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void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
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{
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	if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
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		return;

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	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
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		return;

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	mod_timer(&sdata->u.mgd.bcn_mon_timer,
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		  round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
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}

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void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
{
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	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

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	if (unlikely(!ifmgd->associated))
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		return;

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	if (ifmgd->probe_send_count)
		ifmgd->probe_send_count = 0;
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	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
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		return;

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	mod_timer(&ifmgd->conn_mon_timer,
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		  round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
}

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static int ecw2cw(int ecw)
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{
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	return (1 << ecw) - 1;
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}

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static u32
ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
			     struct ieee80211_supported_band *sband,
			     struct ieee80211_channel *channel,
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			     u32 vht_cap_info,
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			     const struct ieee80211_ht_operation *ht_oper,
			     const struct ieee80211_vht_operation *vht_oper,
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			     const struct ieee80211_he_operation *he_oper,
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			     const struct ieee80211_s1g_oper_ie *s1g_oper,
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			     struct cfg80211_chan_def *chandef, bool tracking)
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{
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	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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	struct cfg80211_chan_def vht_chandef;
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	struct ieee80211_sta_ht_cap sta_ht_cap;
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	u32 ht_cfreq, ret;

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	memset(chandef, 0, sizeof(struct cfg80211_chan_def));
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	chandef->chan = channel;
	chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
	chandef->center_freq1 = channel->center_freq;
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	chandef->freq1_offset = channel->freq_offset;
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	if (channel->band == NL80211_BAND_6GHZ) {
		if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, chandef))
			ret = IEEE80211_STA_DISABLE_HT |
			      IEEE80211_STA_DISABLE_VHT |
			      IEEE80211_STA_DISABLE_HE;
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		else
			ret = 0;
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		vht_chandef = *chandef;
		goto out;
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	} else if (sband->band == NL80211_BAND_S1GHZ) {
		if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) {
			sdata_info(sdata,
				   "Missing S1G Operation Element? Trying operating == primary\n");
			chandef->width = ieee80211_s1g_channel_width(channel);
		}
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		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_40MHZ |
		      IEEE80211_STA_DISABLE_VHT |
		      IEEE80211_STA_DISABLE_80P80MHZ |
		      IEEE80211_STA_DISABLE_160MHZ;
		goto out;
	}

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	memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
	ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);

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	if (!ht_oper || !sta_ht_cap.ht_supported) {
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		ret = IEEE80211_STA_DISABLE_HT |
		      IEEE80211_STA_DISABLE_VHT |
		      IEEE80211_STA_DISABLE_HE;
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		goto out;
	}

	chandef->width = NL80211_CHAN_WIDTH_20;

	ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
						  channel->band);
	/* check that channel matches the right operating channel */
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	if (!tracking && channel->center_freq != ht_cfreq) {
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		/*
		 * 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.
		 */
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		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);
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		ret = IEEE80211_STA_DISABLE_HT |
		      IEEE80211_STA_DISABLE_VHT |
		      IEEE80211_STA_DISABLE_HE;
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		goto out;
	}

	/* check 40 MHz support, if we have it */
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	if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
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		ieee80211_chandef_ht_oper(ht_oper, chandef);
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	} else {
		/* 40 MHz (and 80 MHz) must be supported for VHT */
		ret = IEEE80211_STA_DISABLE_VHT;
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		/* also mark 40 MHz disabled */
		ret |= IEEE80211_STA_DISABLE_40MHZ;
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		goto out;
	}

	if (!vht_oper || !sband->vht_cap.vht_supported) {
		ret = IEEE80211_STA_DISABLE_VHT;
		goto out;
	}

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	vht_chandef = *chandef;
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	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
	    (le32_to_cpu(he_oper->he_oper_params) &
	     IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
		struct ieee80211_vht_operation he_oper_vht_cap;

		/*
		 * Set only first 3 bytes (other 2 aren't used in
		 * ieee80211_chandef_vht_oper() anyway)
		 */
		memcpy(&he_oper_vht_cap, he_oper->optional, 3);
		he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);

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		if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
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						&he_oper_vht_cap, ht_oper,
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						&vht_chandef)) {
			if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
				sdata_info(sdata,
					   "HE AP VHT information is invalid, disable HE\n");
			ret = IEEE80211_STA_DISABLE_HE;
			goto out;
		}
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	} else if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
					       vht_cap_info,
					       vht_oper, ht_oper,
					       &vht_chandef)) {
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		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
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			sdata_info(sdata,
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				   "AP VHT information is invalid, disable VHT\n");
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		ret = IEEE80211_STA_DISABLE_VHT;
		goto out;
	}

	if (!cfg80211_chandef_valid(&vht_chandef)) {
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		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
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			sdata_info(sdata,
				   "AP VHT information is invalid, disable VHT\n");
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		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)) {
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		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
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			sdata_info(sdata,
				   "AP VHT information doesn't match HT, disable VHT\n");
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		ret = IEEE80211_STA_DISABLE_VHT;
		goto out;
	}

	*chandef = vht_chandef;

	ret = 0;

out:
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	/*
	 * 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;

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	/* don't print the message below for VHT mismatch if VHT is disabled */
	if (ret & IEEE80211_STA_DISABLE_VHT)
		vht_chandef = *chandef;

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	/*
	 * 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.
	 */
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	while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
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					tracking ? 0 :
						   IEEE80211_CHAN_DISABLED)) {
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		if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
			ret = IEEE80211_STA_DISABLE_HT |
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			      IEEE80211_STA_DISABLE_VHT |
			      IEEE80211_STA_DISABLE_HE;
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			break;
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		}

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		ret |= ieee80211_chandef_downgrade(chandef);
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	}

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	if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
						 IEEE80211_CHAN_NO_HE))
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		ret |= IEEE80211_STA_DISABLE_HE;

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	if (chandef->width != vht_chandef.width && !tracking)
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		sdata_info(sdata,
			   "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");

	WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
	return ret;
}

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static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
			       struct sta_info *sta,
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			       const struct ieee80211_ht_cap *ht_cap,
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			       const struct ieee80211_vht_cap *vht_cap,
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			       const struct ieee80211_ht_operation *ht_oper,
			       const struct ieee80211_vht_operation *vht_oper,
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			       const struct ieee80211_he_operation *he_oper,
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			       const struct ieee80211_s1g_oper_ie *s1g_oper,
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			       const u8 *bssid, u32 *changed)
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{
	struct ieee80211_local *local = sdata->local;
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	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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	struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
	struct ieee80211_supported_band *sband =
		local->hw.wiphy->bands[chan->band];
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	struct cfg80211_chan_def chandef;
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	u16 ht_opmode;
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	u32 flags;
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	u32 vht_cap_info = 0;
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	int ret;
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	/* if HT was/is disabled, don't track any bandwidth changes */
	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
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		return 0;

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	/* don't check VHT if we associated as non-VHT station */
	if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
		vht_oper = NULL;

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	/* don't check HE if we associated as non-HE station */
	if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
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	    !ieee80211_get_he_iftype_cap(sband,
					 ieee80211_vif_type_p2p(&sdata->vif)))

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		he_oper = NULL;

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	if (WARN_ON_ONCE(!sta))
		return -EINVAL;

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	/*
	 * 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;
	}

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	if (vht_cap)
		vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info);

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	/* calculate new channel (type) based on HT/VHT/HE operation IEs */
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	flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info,
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					     ht_oper, vht_oper, he_oper,
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					     s1g_oper, &chandef, true);
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	/*
	 * 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)
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		flags |= ieee80211_chandef_downgrade(&chandef);
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	if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
	    chandef.width == NL80211_CHAN_WIDTH_160)
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		flags |= ieee80211_chandef_downgrade(&chandef);
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	if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
	    chandef.width > NL80211_CHAN_WIDTH_20)
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		flags |= ieee80211_chandef_downgrade(&chandef);
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	if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
		return 0;

	sdata_info(sdata,
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		   "AP %pM changed bandwidth, new config is %d.%03d MHz, "
		   "width %d (%d.%03d/%d MHz)\n",
		   ifmgd->bssid, chandef.chan->center_freq,
		   chandef.chan->freq_offset, chandef.width,
		   chandef.center_freq1, chandef.freq1_offset,
		   chandef.center_freq2);
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	if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
				      IEEE80211_STA_DISABLE_VHT |
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				      IEEE80211_STA_DISABLE_HE |
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				      IEEE80211_STA_DISABLE_40MHZ |
				      IEEE80211_STA_DISABLE_80P80MHZ |
				      IEEE80211_STA_DISABLE_160MHZ)) ||
	    !cfg80211_chandef_valid(&chandef)) {
		sdata_info(sdata,
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			   "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n",
			   ifmgd->bssid, flags, ifmgd->flags);
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		return -EINVAL;
	}

	ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
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	if (ret) {
		sdata_info(sdata,
			   "AP %pM changed bandwidth to incompatible one - disconnect\n",
			   ifmgd->bssid);
		return ret;
	}
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	return 0;
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}

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/* frame sending functions */

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static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
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				struct sk_buff *skb, u8 ap_ht_param,
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				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;

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	switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
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	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;
	}

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	/*
	 * 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;
	}

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	/* 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);
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		fallthrough;
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	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);
}

538 539 540 541
/* 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
 */
542 543
static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
				 struct sk_buff *skb,
544 545
				 struct ieee80211_supported_band *sband,
				 struct ieee80211_vht_cap *ap_vht_cap)
546
{
547
	struct ieee80211_local *local = sdata->local;
548 549 550
	u8 *pos;
	u32 cap;
	struct ieee80211_sta_vht_cap vht_cap;
551
	u32 mask, ap_bf_sts, our_bf_sts;
552 553 554 555

	BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));

	memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
556
	ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
557 558 559 560

	/* determine capability flags */
	cap = vht_cap.cap;

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	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
562 563 564 565 566 567
		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;
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	}

	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
		cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
572
		cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
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	}

575 576 577 578 579 580
	/*
	 * 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)))
581 582 583 584 585 586 587
		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;

	/*
588
	 * If some other vif is using the MU-MIMO capability we cannot associate
589 590 591 592 593 594 595 596 597 598
	 * 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) {
599
			if (other->vif.mu_mimo_owner) {
600 601 602 603 604 605 606
				disable_mu_mimo = true;
				break;
			}
		}
		if (disable_mu_mimo)
			cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
		else
607
			sdata->vif.mu_mimo_owner = true;
608
	}
609

610 611 612 613 614 615 616 617 618 619
	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;
	}

620
	/* reserve and fill IE */
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	pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
622 623 624
	ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
}

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/* This function determines HE capability flags for the association
 * and builds the IE.
 */
static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
				struct sk_buff *skb,
				struct ieee80211_supported_band *sband)
{
	u8 *pos;
	const struct ieee80211_sta_he_cap *he_cap = NULL;
634
	struct ieee80211_chanctx_conf *chanctx_conf;
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	u8 he_cap_size;
636 637 638 639 640 641 642 643 644 645
	bool reg_cap = false;

	rcu_read_lock();
	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
	if (!WARN_ON_ONCE(!chanctx_conf))
		reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy,
						  &chanctx_conf->def,
						  IEEE80211_CHAN_NO_HE);

	rcu_read_unlock();
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647 648
	he_cap = ieee80211_get_he_iftype_cap(sband,
					     ieee80211_vif_type_p2p(&sdata->vif));
649
	if (!he_cap || !reg_cap)
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		return;

	/*
	 * TODO: the 1 added is because this temporarily is under the EXTENSION
	 * IE. Get rid of it when it moves.
	 */
	he_cap_size =
		2 + 1 + sizeof(he_cap->he_cap_elem) +
		ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
		ieee80211_he_ppe_size(he_cap->ppe_thres[0],
				      he_cap->he_cap_elem.phy_cap_info);
	pos = skb_put(skb, he_cap_size);
	ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
663 664

	ieee80211_ie_build_he_6ghz_cap(sdata, skb);
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}

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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;
674
	u8 *pos, qos_info, *ie_start;
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	size_t offset = 0, noffset;
676
	int i, count, rates_len, supp_rates_len, shift;
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	u16 capab;
	struct ieee80211_supported_band *sband;
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	struct ieee80211_chanctx_conf *chanctx_conf;
	struct ieee80211_channel *chan;
681
	u32 rates = 0;
682
	__le16 listen_int;
683
	struct element *ext_capa = NULL;
684 685
	enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
	const struct ieee80211_sband_iftype_data *iftd;
686 687 688 689 690 691

	/* we know it's writable, cast away the const */
	if (assoc_data->ie_len)
		ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
						      assoc_data->ie,
						      assoc_data->ie_len);
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693
	sdata_assert_lock(sdata);
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694

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695 696 697 698 699 700
	rcu_read_lock();
	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
	if (WARN_ON(!chanctx_conf)) {
		rcu_read_unlock();
		return;
	}
701
	chan = chanctx_conf->def.chan;
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	rcu_read_unlock();
	sband = local->hw.wiphy->bands[chan->band];
704
	shift = ieee80211_vif_get_shift(&sdata->vif);
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	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)...
		 */
713 714 715 716
		rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
						     assoc_data->supp_rates,
						     assoc_data->supp_rates_len,
						     &rates);
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	} else {
		/*
		 * In case AP not provide any supported rates information
		 * before association, we send information element(s) with
		 * all rates that we support.
		 */
723 724 725 726 727
		rates_len = 0;
		for (i = 0; i < sband->n_bitrates; i++) {
			rates |= BIT(i);
			rates_len++;
		}
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728 729
	}

730 731
	iftd = ieee80211_get_sband_iftype_data(sband, iftype);

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	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 */
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			2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
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			2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
				sizeof(struct ieee80211_he_mcs_nss_supp) +
				IEEE80211_HE_PPE_THRES_MAX_LEN +
743
			2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
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			assoc_data->ie_len + /* extra IEs */
745
			(assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
746 747
			9 + /* WMM */
			(iftd ? iftd->vendor_elems.len : 0),
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			GFP_KERNEL);
	if (!skb)
		return;

	skb_reserve(skb, local->hw.extra_tx_headroom);

	capab = WLAN_CAPABILITY_ESS;

756
	if (sband->band == NL80211_BAND_2GHZ) {
757 758
		capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
		capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
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	}

	if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
		capab |= WLAN_CAPABILITY_PRIVACY;

	if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
765
	    ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
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		capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;

768 769 770
	if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
		capab |= WLAN_CAPABILITY_RADIO_MEASURE;

771
	mgmt = skb_put_zero(skb, 24);
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	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);

776 777 778
	listen_int = cpu_to_le16(sband->band == NL80211_BAND_S1GHZ ?
			ieee80211_encode_usf(local->hw.conf.listen_interval) :
			local->hw.conf.listen_interval);
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	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);
784
		mgmt->u.reassoc_req.listen_interval = listen_int;
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		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);
792
		mgmt->u.assoc_req.listen_interval = listen_int;
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	}

	/* SSID */
	pos = skb_put(skb, 2 + assoc_data->ssid_len);
797
	ie_start = pos;
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	*pos++ = WLAN_EID_SSID;
	*pos++ = assoc_data->ssid_len;
	memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);

802 803 804
	if (sband->band == NL80211_BAND_S1GHZ)
		goto skip_rates;

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805 806 807 808 809 810 811 812 813 814 815 816
	/* 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) {
817 818 819
			int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
						5 * (1 << shift));
			*pos++ = (u8) rate;
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820 821 822 823 824 825 826 827 828 829 830 831
			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) {
832 833 834 835
				int rate;
				rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
						    5 * (1 << shift));
				*pos++ = (u8) rate;
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836 837 838 839
			}
		}
	}

840
skip_rates:
841 842
	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
	    capab & WLAN_CAPABILITY_RADIO_MEASURE) {
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843 844 845 846
		pos = skb_put(skb, 4);
		*pos++ = WLAN_EID_PWR_CAPABILITY;
		*pos++ = 2;
		*pos++ = 0; /* min tx power */
847 848
		 /* max tx power */
		*pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
849
	}
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850

851 852 853 854 855 856 857 858 859
	/*
	 * Per spec, we shouldn't include the list of channels if we advertise
	 * support for extended channel switching, but we've always done that;
	 * (for now?) apply this restriction only on the (new) 6 GHz band.
	 */
	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
	    (sband->band != NL80211_BAND_6GHZ ||
	     !ext_capa || ext_capa->datalen < 1 ||
	     !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
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860 861 862 863 864 865 866 867 868 869 870
		/* 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*/
		}
	}

871 872
	/* Set MBSSID support for HE AP if needed */
	if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
873 874 875
	    !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len &&
	    ext_capa && ext_capa->datalen >= 3)
		ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
876

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877
	/* if present, add any custom IEs that go before HT */
878
	if (assoc_data->ie_len) {
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879 880 881 882 883 884 885 886 887 888
		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,
889 890
			WLAN_EID_FAST_BSS_TRANSITION,	/* reassoc only */
			WLAN_EID_RIC_DATA,		/* reassoc only */
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			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
		};
893 894 895 896
		static const u8 after_ric[] = {
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
			WLAN_EID_HT_CAPABILITY,
			WLAN_EID_BSS_COEX_2040,
897
			/* luckily this is almost always there */
898 899 900 901
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_QOS_TRAFFIC_CAPA,
			WLAN_EID_TIM_BCAST_REQ,
			WLAN_EID_INTERWORKING,
902
			/* 60 GHz (Multi-band, DMG, MMS) can't happen */
903 904 905 906 907 908 909 910 911 912 913
			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);
914
		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
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		offset = noffset;
	}

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918 919 920 921
	if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
			 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;

922 923
	if (sband->band != NL80211_BAND_6GHZ &&
	    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
924
		ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
925
				    sband, chan, sdata->smps_mode);
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927 928 929
	/* if present, add any custom IEs that go before VHT */
	if (assoc_data->ie_len) {
		static const u8 before_vht[] = {
930 931 932 933
			/*
			 * no need to list the ones split off before HT
			 * or generated here
			 */
934 935 936 937 938
			WLAN_EID_BSS_COEX_2040,
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_QOS_TRAFFIC_CAPA,
			WLAN_EID_TIM_BCAST_REQ,
			WLAN_EID_INTERWORKING,
939
			/* 60 GHz (Multi-band, DMG, MMS) can't happen */
940
		};
941 942

		/* RIC already taken above, so no need to handle here anymore */
943 944 945
		noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
					     before_vht, ARRAY_SIZE(before_vht),
					     offset);
946
		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
947 948 949
		offset = noffset;
	}

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	/* if present, add any custom IEs that go before HE */
	if (assoc_data->ie_len) {
		static const u8 before_he[] = {
			/*
			 * no need to list the ones split off before VHT
			 * or generated here
			 */
			WLAN_EID_OPMODE_NOTIF,
			WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
			/* 11ai elements */
			WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
			WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
			WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
			WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
			WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
			/* TODO: add 11ah/11aj/11ak elements */
		};

		/* RIC already taken above, so no need to handle here anymore */
		noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
					     before_he, ARRAY_SIZE(before_he),
					     offset);
		pos = skb_put(skb, noffset - offset);
		memcpy(pos, assoc_data->ie + offset, noffset - offset);
		offset = noffset;
	}

977 978
	if (sband->band != NL80211_BAND_6GHZ &&
	    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
979 980
		ieee80211_add_vht_ie(sdata, skb, sband,
				     &assoc_data->ap_vht_cap);
981

982 983 984 985 986 987 988 989 990
	/*
	 * If AP doesn't support HT, mark HE as disabled.
	 * If on the 5GHz band, make sure it supports VHT.
	 */
	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
	    (sband->band == NL80211_BAND_5GHZ &&
	     ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;

L
Luca Coelho 已提交
991 992 993 994
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
		ieee80211_add_he_ie(sdata, skb, sband);

	/* if present, add any custom non-vendor IEs that go after HE */
995
	if (assoc_data->ie_len) {
J
Johannes Berg 已提交
996 997 998
		noffset = ieee80211_ie_split_vendor(assoc_data->ie,
						    assoc_data->ie_len,
						    offset);
999
		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
J
Johannes Berg 已提交
1000 1001 1002
		offset = noffset;
	}

1003 1004
	if (assoc_data->wmm) {
		if (assoc_data->uapsd) {
1005 1006
			qos_info = ifmgd->uapsd_queues;
			qos_info |= (ifmgd->uapsd_max_sp_len <<
J
Johannes Berg 已提交
1007 1008 1009 1010 1011
				     IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
		} else {
			qos_info = 0;
		}

1012
		pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
J
Johannes Berg 已提交
1013 1014
	}

1015 1016
	if (sband->band == NL80211_BAND_S1GHZ) {
		ieee80211_add_aid_request_ie(sdata, skb);
1017
		ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb);
1018
	}
1019

1020 1021 1022
	if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len)
		skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len);

J
Johannes Berg 已提交
1023
	/* add any remaining custom (i.e. vendor specific here) IEs */
1024
	if (assoc_data->ie_len) {
J
Johannes Berg 已提交
1025
		noffset = assoc_data->ie_len;
1026
		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
J
Johannes Berg 已提交
1027 1028
	}

1029 1030 1031 1032 1033 1034
	if (assoc_data->fils_kek_len &&
	    fils_encrypt_assoc_req(skb, assoc_data) < 0) {
		dev_kfree_skb(skb);
		return;
	}

1035 1036 1037 1038 1039
	pos = skb_tail_pointer(skb);
	kfree(ifmgd->assoc_req_ies);
	ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
	ifmgd->assoc_req_ies_len = pos - ie_start;

1040
	drv_mgd_prepare_tx(local, sdata, 0);
J
Johannes Berg 已提交
1041

J
Johannes Berg 已提交
1042
	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1043
	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1044 1045
		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
						IEEE80211_TX_INTFL_MLME_CONN_TX;
J
Johannes Berg 已提交
1046 1047 1048
	ieee80211_tx_skb(sdata, skb);
}

1049 1050 1051 1052 1053 1054
void ieee80211_send_pspoll(struct ieee80211_local *local,
			   struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_pspoll *pspoll;
	struct sk_buff *skb;

1055 1056
	skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
	if (!skb)
1057 1058
		return;

1059 1060
	pspoll = (struct ieee80211_pspoll *) skb->data;
	pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1061

1062 1063
	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
	ieee80211_tx_skb(sdata, skb);
1064 1065
}

1066 1067
void ieee80211_send_nullfunc(struct ieee80211_local *local,
			     struct ieee80211_sub_if_data *sdata,
1068
			     bool powersave)
1069 1070
{
	struct sk_buff *skb;
1071
	struct ieee80211_hdr_3addr *nullfunc;
1072
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1073

1074 1075
	skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
		!ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1076
	if (!skb)
1077 1078
		return;

1079
	nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1080
	if (powersave)
1081
		nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1082

1083 1084
	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
					IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1085

1086
	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1087 1088
		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;

1089
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1090 1091
		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;

1092
	ieee80211_tx_skb(sdata, skb);
1093 1094
}

1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105
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);
1106
	if (!skb)
1107
		return;
1108

1109 1110
	skb_reserve(skb, local->hw.extra_tx_headroom);

1111
	nullfunc = skb_put_zero(skb, 30);
1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123
	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);
}

1124 1125 1126 1127 1128
/* 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);
1129
	struct ieee80211_local *local = sdata->local;
1130
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1131
	int ret;
1132

1133
	if (!ieee80211_sdata_running(sdata))
1134 1135
		return;

1136
	sdata_lock(sdata);
1137 1138 1139
	mutex_lock(&local->mtx);
	mutex_lock(&local->chanctx_mtx);

1140 1141
	if (!ifmgd->associated)
		goto out;
1142

1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176
	if (!sdata->vif.csa_active)
		goto out;

	/*
	 * using reservation isn't immediate as it may be deferred until later
	 * with multi-vif. once reservation is complete it will re-schedule the
	 * work with no reserved_chanctx so verify chandef to check if it
	 * completed successfully
	 */

	if (sdata->reserved_chanctx) {
		/*
		 * with multi-vif csa driver may call ieee80211_csa_finish()
		 * many times while waiting for other interfaces to use their
		 * reservations
		 */
		if (sdata->reserved_ready)
			goto out;

		ret = ieee80211_vif_use_reserved_context(sdata);
		if (ret) {
			sdata_info(sdata,
				   "failed to use reserved channel context, disconnecting (err=%d)\n",
				   ret);
			ieee80211_queue_work(&sdata->local->hw,
					     &ifmgd->csa_connection_drop_work);
			goto out;
		}

		goto out;
	}

	if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
					&sdata->csa_chandef)) {
1177
		sdata_info(sdata,
1178
			   "failed to finalize channel switch, disconnecting\n");
1179 1180 1181 1182
		ieee80211_queue_work(&sdata->local->hw,
				     &ifmgd->csa_connection_drop_work);
		goto out;
	}
1183

1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203
	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);
1204

1205 1206 1207 1208 1209
	if (sdata->csa_block_tx) {
		ieee80211_wake_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
		sdata->csa_block_tx = false;
	}
1210

1211 1212
	sdata->vif.csa_active = false;
	ifmgd->csa_waiting_bcn = false;
1213 1214 1215 1216 1217
	/*
	 * If the CSA IE is still present on the beacon after the switch,
	 * we need to consider it as a new CSA (possibly to self).
	 */
	ifmgd->beacon_crc_valid = false;
1218

1219 1220 1221 1222 1223 1224
	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);
1225
		return;
1226
	}
1227 1228

	cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1229 1230
}

1231 1232
void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
{
J
Johannes Berg 已提交
1233 1234
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1235 1236 1237

	trace_api_chswitch_done(sdata, success);
	if (!success) {
1238 1239 1240 1241 1242 1243
		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);
1244 1245 1246 1247
	}
}
EXPORT_SYMBOL(ieee80211_chswitch_done);

1248
static void ieee80211_chswitch_timer(struct timer_list *t)
1249 1250
{
	struct ieee80211_sub_if_data *sdata =
1251
		from_timer(sdata, t, u.mgd.chswitch_timer);
1252

1253
	ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1254 1255
}

1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281
static void
ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_local *local = sdata->local;

	if (!local->ops->abort_channel_switch)
		return;

	mutex_lock(&local->mtx);

	mutex_lock(&local->chanctx_mtx);
	ieee80211_vif_unreserve_chanctx(sdata);
	mutex_unlock(&local->chanctx_mtx);

	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;

	mutex_unlock(&local->mtx);

	drv_abort_channel_switch(sdata);
}

1282
static void
J
Johannes Berg 已提交
1283
ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1284 1285
				 u64 timestamp, u32 device_timestamp,
				 struct ieee802_11_elems *elems,
1286
				 bool beacon)
1287
{
1288
	struct ieee80211_local *local = sdata->local;
1289
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1290
	struct cfg80211_bss *cbss = ifmgd->associated;
1291
	struct ieee80211_chanctx_conf *conf;
J
Johannes Berg 已提交
1292
	struct ieee80211_chanctx *chanctx;
1293
	enum nl80211_band current_band;
1294
	struct ieee80211_csa_ie csa_ie;
1295
	struct ieee80211_channel_switch ch_switch;
1296
	struct ieee80211_bss *bss;
1297
	int res;
1298

1299
	sdata_assert_lock(sdata);
1300

1301
	if (!cbss)
1302 1303
		return;

1304
	if (local->scanning)
1305 1306
		return;

1307
	current_band = cbss->channel->band;
1308
	bss = (void *)cbss->priv;
1309
	res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1310
					   bss->vht_cap_info,
1311
					   ifmgd->flags,
1312
					   ifmgd->associated->bssid, &csa_ie);
1313 1314 1315 1316

	if (!res) {
		ch_switch.timestamp = timestamp;
		ch_switch.device_timestamp = device_timestamp;
1317
		ch_switch.block_tx = csa_ie.mode;
1318 1319 1320 1321 1322
		ch_switch.chandef = csa_ie.chandef;
		ch_switch.count = csa_ie.count;
		ch_switch.delay = csa_ie.max_switch_time;
	}

1323 1324
	if (res < 0)
		goto lock_and_drop_connection;
1325

1326 1327 1328 1329 1330
	if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
		if (res)
			ieee80211_sta_abort_chanswitch(sdata);
		else
			drv_channel_switch_rx_beacon(sdata, &ch_switch);
1331 1332 1333 1334 1335
		return;
	} else if (sdata->vif.csa_active || res) {
		/* disregard subsequent announcements if already processing */
		return;
	}
1336

1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347
	if (sdata->vif.bss_conf.chandef.chan->band !=
	    csa_ie.chandef.chan->band) {
		sdata_info(sdata,
			   "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
			   ifmgd->associated->bssid,
			   csa_ie.chandef.chan->center_freq,
			   csa_ie.chandef.width, csa_ie.chandef.center_freq1,
			   csa_ie.chandef.center_freq2);
		goto lock_and_drop_connection;
	}

1348
	if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1349 1350
				     IEEE80211_CHAN_DISABLED)) {
		sdata_info(sdata,
1351 1352 1353
			   "AP %pM switches to unsupported channel "
			   "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), "
			   "disconnecting\n",
1354
			   ifmgd->associated->bssid,
1355
			   csa_ie.chandef.chan->center_freq,
1356
			   csa_ie.chandef.chan->freq_offset,
1357
			   csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1358
			   csa_ie.chandef.freq1_offset,
1359
			   csa_ie.chandef.center_freq2);
1360
		goto lock_and_drop_connection;
1361 1362
	}

1363
	if (cfg80211_chandef_identical(&csa_ie.chandef,
1364 1365
				       &sdata->vif.bss_conf.chandef) &&
	    (!csa_ie.mode || !beacon)) {
1366 1367 1368 1369 1370 1371 1372 1373 1374
		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;
	}

1375 1376 1377 1378 1379 1380 1381 1382
	/*
	 * 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);

1383
	mutex_lock(&local->mtx);
1384
	mutex_lock(&local->chanctx_mtx);
1385 1386 1387 1388 1389
	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");
1390
		goto drop_connection;
1391 1392 1393 1394
	}

	chanctx = container_of(conf, struct ieee80211_chanctx, conf);

1395
	if (local->use_chanctx &&
1396
	    !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1397 1398
		sdata_info(sdata,
			   "driver doesn't support chan-switch with channel contexts\n");
1399
		goto drop_connection;
J
Johannes Berg 已提交
1400 1401
	}

1402 1403 1404
	if (drv_pre_channel_switch(sdata, &ch_switch)) {
		sdata_info(sdata,
			   "preparing for channel switch failed, disconnecting\n");
1405
		goto drop_connection;
1406 1407
	}

1408 1409 1410
	res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
					    chanctx->mode, false);
	if (res) {
J
Johannes Berg 已提交
1411
		sdata_info(sdata,
1412 1413
			   "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
			   res);
1414
		goto drop_connection;
J
Johannes Berg 已提交
1415
	}
1416
	mutex_unlock(&local->chanctx_mtx);
J
Johannes Berg 已提交
1417

1418
	sdata->vif.csa_active = true;
1419
	sdata->csa_chandef = csa_ie.chandef;
1420
	sdata->csa_block_tx = csa_ie.mode;
1421
	ifmgd->csa_ignored_same_chan = false;
1422
	ifmgd->beacon_crc_valid = false;
J
Johannes Berg 已提交
1423

1424
	if (sdata->csa_block_tx)
1425 1426
		ieee80211_stop_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
1427
	mutex_unlock(&local->mtx);
1428

1429
	cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1430
					  csa_ie.count, csa_ie.mode);
1431

1432
	if (local->ops->channel_switch) {
1433
		/* use driver's channel switch callback */
1434
		drv_channel_switch(local, sdata, &ch_switch);
1435 1436 1437 1438
		return;
	}

	/* channel switch handled in software */
1439
	if (csa_ie.count <= 1)
1440
		ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1441
	else
1442
		mod_timer(&ifmgd->chswitch_timer,
1443 1444
			  TU_TO_EXP_TIME((csa_ie.count - 1) *
					 cbss->beacon_interval));
1445
	return;
1446 1447 1448
 lock_and_drop_connection:
	mutex_lock(&local->mtx);
	mutex_lock(&local->chanctx_mtx);
1449
 drop_connection:
1450 1451 1452 1453 1454 1455 1456 1457
	/*
	 * This is just so that the disconnect flow will know that
	 * we were trying to switch channel and failed. In case the
	 * mode is 1 (we are not allowed to Tx), we will know not to
	 * send a deauthentication frame. Those two fields will be
	 * reset when the disconnection worker runs.
	 */
	sdata->vif.csa_active = true;
1458
	sdata->csa_block_tx = csa_ie.mode;
1459

1460 1461 1462
	ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
	mutex_unlock(&local->chanctx_mtx);
	mutex_unlock(&local->mtx);
1463 1464
}

1465 1466 1467 1468 1469 1470
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)
1471
{
1472 1473
	struct ieee80211_country_ie_triplet *triplet;
	int chan = ieee80211_frequency_to_channel(channel->center_freq);
1474
	int i, chan_increment;
1475
	bool have_chan_pwr = false;
1476

1477 1478
	/* Invalid IE */
	if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1479
		return false;
1480

1481 1482 1483 1484 1485 1486
	triplet = (void *)(country_ie + 3);
	country_ie_len -= 3;

	switch (channel->band) {
	default:
		WARN_ON_ONCE(1);
1487
		fallthrough;
1488 1489
	case NL80211_BAND_2GHZ:
	case NL80211_BAND_60GHZ:
1490 1491
		chan_increment = 1;
		break;
1492
	case NL80211_BAND_5GHZ:
1493 1494
		chan_increment = 4;
		break;
1495 1496 1497 1498 1499 1500 1501 1502 1503
	case NL80211_BAND_6GHZ:
		/*
		 * In the 6 GHz band, the "maximum transmit power level"
		 * field in the triplets is reserved, and thus will be
		 * zero and we shouldn't use it to control TX power.
		 * The actual TX power will be given in the transmit
		 * power envelope element instead.
		 */
		return false;
1504
	}
1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515

	/* 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;
1516
				*chan_pwr = triplet->chans.max_power;
1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527
				break;
			}
		}
		if (have_chan_pwr)
			break;

 next:
		triplet++;
		country_ie_len -= 3;
	}

1528
	if (have_chan_pwr && pwr_constr_elem)
1529
		*pwr_reduction = *pwr_constr_elem;
1530 1531 1532
	else
		*pwr_reduction = 0;

1533 1534 1535
	return have_chan_pwr;
}

1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549
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];
}

1550 1551 1552 1553
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,
1554 1555
				       const u8 *pwr_constr_ie,
				       const u8 *cisco_dtpc_ie)
1556
{
1557 1558 1559
	bool has_80211h_pwr = false, has_cisco_pwr = false;
	int chan_pwr = 0, pwr_reduction_80211h = 0;
	int pwr_level_cisco, pwr_level_80211h;
1560
	int new_ap_level;
1561
	__le16 capab = mgmt->u.probe_resp.capab_info;
1562

1563 1564 1565
	if (ieee80211_is_s1g_beacon(mgmt->frame_control))
		return 0;	/* TODO */

1566 1567 1568
	if (country_ie &&
	    (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
	     capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1569 1570 1571
		has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
			sdata, channel, country_ie, country_ie_len,
			pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1572 1573 1574 1575 1576 1577 1578 1579
		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;
1580
	}
1581

1582
	if (!has_80211h_pwr && !has_cisco_pwr)
1583
		return 0;
1584

1585 1586 1587 1588 1589
	/* 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)) {
1590 1591 1592 1593 1594
		new_ap_level = pwr_level_80211h;

		if (sdata->ap_power_level == new_ap_level)
			return 0;

1595 1596 1597 1598
		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);
1599
	} else {  /* has_cisco_pwr is always true here. */
1600 1601 1602 1603 1604
		new_ap_level = pwr_level_cisco;

		if (sdata->ap_power_level == new_ap_level)
			return 0;

1605 1606 1607
		sdata_dbg(sdata,
			  "Limiting TX power to %d dBm as advertised by %pM\n",
			  pwr_level_cisco, sdata->u.mgd.bssid);
1608
	}
1609

1610 1611 1612 1613
	sdata->ap_power_level = new_ap_level;
	if (__ieee80211_recalc_txpower(sdata))
		return BSS_CHANGED_TXPOWER;
	return 0;
1614 1615
}

1616 1617 1618 1619 1620 1621
/* powersave */
static void ieee80211_enable_ps(struct ieee80211_local *local,
				struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_conf *conf = &local->hw.conf;

J
Johannes Berg 已提交
1622 1623 1624 1625
	/*
	 * If we are scanning right now then the parameters will
	 * take effect when scan finishes.
	 */
1626
	if (local->scanning)
J
Johannes Berg 已提交
1627 1628
		return;

1629
	if (conf->dynamic_ps_timeout > 0 &&
1630
	    !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1631 1632 1633
		mod_timer(&local->dynamic_ps_timer, jiffies +
			  msecs_to_jiffies(conf->dynamic_ps_timeout));
	} else {
1634
		if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1635
			ieee80211_send_nullfunc(local, sdata, true);
1636

1637 1638
		if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
		    ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1639 1640 1641 1642
			return;

		conf->flags |= IEEE80211_CONF_PS;
		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659
	}
}

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);
	}
}

1660 1661 1662 1663
static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *mgd = &sdata->u.mgd;
	struct sta_info *sta = NULL;
J
Johannes Berg 已提交
1664
	bool authorized = false;
1665 1666 1667 1668

	if (!mgd->powersave)
		return false;

1669 1670 1671
	if (mgd->broken_ap)
		return false;

1672 1673 1674
	if (!mgd->associated)
		return false;

1675
	if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1676 1677
		return false;

1678
	if (!mgd->have_beacon)
1679 1680
		return false;

1681 1682 1683
	rcu_read_lock();
	sta = sta_info_get(sdata, mgd->bssid);
	if (sta)
J
Johannes Berg 已提交
1684
		authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1685 1686
	rcu_read_unlock();

J
Johannes Berg 已提交
1687
	return authorized;
1688 1689
}

1690
/* need to hold RTNL or interface lock */
J
Johannes Berg 已提交
1691
void ieee80211_recalc_ps(struct ieee80211_local *local)
1692 1693 1694
{
	struct ieee80211_sub_if_data *sdata, *found = NULL;
	int count = 0;
1695
	int timeout;
1696

1697
	if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1698 1699 1700 1701 1702
		local->ps_sdata = NULL;
		return;
	}

	list_for_each_entry(sdata, &local->interfaces, list) {
1703
		if (!ieee80211_sdata_running(sdata))
1704
			continue;
1705 1706 1707 1708 1709 1710 1711 1712
		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;
		}
1713 1714 1715 1716 1717 1718
		if (sdata->vif.type != NL80211_IFTYPE_STATION)
			continue;
		found = sdata;
		count++;
	}

1719
	if (count == 1 && ieee80211_powersave_allowed(found)) {
J
Johannes Berg 已提交
1720
		u8 dtimper = found->u.mgd.dtim_period;
1721

1722
		timeout = local->dynamic_ps_forced_timeout;
J
Johannes Berg 已提交
1723 1724
		if (timeout < 0)
			timeout = 100;
1725
		local->hw.conf.dynamic_ps_timeout = timeout;
1726

J
Johannes Berg 已提交
1727 1728 1729 1730 1731 1732
		/* 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;
1733
	} else {
1734
		local->ps_sdata = NULL;
1735
	}
1736 1737 1738 1739

	ieee80211_change_ps(local);
}

E
Eliad Peller 已提交
1740 1741 1742 1743 1744 1745 1746 1747 1748 1749
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);
	}
}

1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761
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,
1762
					IEEE80211_MAX_QUEUE_MAP,
1763 1764
					IEEE80211_QUEUE_STOP_REASON_PS,
					false);
1765 1766 1767 1768 1769 1770 1771 1772
}

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;
1773
	struct ieee80211_if_managed *ifmgd;
1774 1775
	unsigned long flags;
	int q;
1776 1777 1778 1779 1780

	/* can only happen when PS was just disabled anyway */
	if (!sdata)
		return;

1781 1782
	ifmgd = &sdata->u.mgd;

1783 1784 1785
	if (local->hw.conf.flags & IEEE80211_CONF_PS)
		return;

1786
	if (local->hw.conf.dynamic_ps_timeout > 0) {
1787 1788
		/* don't enter PS if TX frames are pending */
		if (drv_tx_frames_pending(local)) {
1789 1790 1791 1792 1793
			mod_timer(&local->dynamic_ps_timer, jiffies +
				  msecs_to_jiffies(
				  local->hw.conf.dynamic_ps_timeout));
			return;
		}
1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811

		/*
		 * 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);
1812 1813
	}

1814
	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1815
	    !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1816
		if (drv_tx_frames_pending(local)) {
1817 1818 1819
			mod_timer(&local->dynamic_ps_timer, jiffies +
				  msecs_to_jiffies(
				  local->hw.conf.dynamic_ps_timeout));
1820
		} else {
1821
			ieee80211_send_nullfunc(local, sdata, true);
1822
			/* Flush to get the tx status of nullfunc frame */
1823
			ieee80211_flush_queues(local, sdata, false);
1824
		}
1825 1826
	}

1827 1828
	if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
	      ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1829 1830 1831 1832 1833
	    (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);
	}
1834 1835
}

1836
void ieee80211_dynamic_ps_timer(struct timer_list *t)
1837
{
1838
	struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1839

1840
	ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1841 1842
}

1843 1844
void ieee80211_dfs_cac_timer_work(struct work_struct *work)
{
1845
	struct delayed_work *delayed_work = to_delayed_work(work);
1846 1847 1848
	struct ieee80211_sub_if_data *sdata =
		container_of(delayed_work, struct ieee80211_sub_if_data,
			     dfs_cac_timer_work);
1849
	struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1850

1851 1852 1853 1854 1855 1856 1857 1858
	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);
1859 1860
}

1861 1862 1863 1864 1865
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;
1866
	bool ret = false;
1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910
	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;
1911 1912 1913 1914 1915 1916
			/* Usually the loop will result in using BK even if it
			 * requires admission control, but such a configuration
			 * makes no sense and we have to transmit somehow - the
			 * AC selection does the same thing.
			 * If we started out trying to downgrade from BK, then
			 * the extra condition here might be needed.
1917
			 */
1918 1919
			if (non_acm_ac >= IEEE80211_NUM_ACS)
				non_acm_ac = IEEE80211_AC_BK;
1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953
			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);
}

J
Johannes Berg 已提交
1954
/* MLME */
L
Luca Coelho 已提交
1955 1956 1957 1958 1959
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,
			 const struct ieee80211_mu_edca_param_set *mu_edca)
1960
{
1961
	struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1962
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1963
	size_t left;
1964
	int count, mu_edca_count, ac;
J
Johannes Berg 已提交
1965 1966
	const u8 *pos;
	u8 uapsd_queues = 0;
1967

1968
	if (!local->ops->conf_tx)
1969
		return false;
1970

J
Johannes Berg 已提交
1971
	if (local->hw.queues < IEEE80211_NUM_ACS)
1972
		return false;
1973 1974

	if (!wmm_param)
1975
		return false;
1976

1977
	if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1978
		return false;
K
Kalle Valo 已提交
1979 1980

	if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1981
		uapsd_queues = ifmgd->uapsd_queues;
K
Kalle Valo 已提交
1982

1983
	count = wmm_param[6] & 0x0f;
1984 1985 1986 1987 1988 1989 1990
	/* -1 is the initial value of ifmgd->mu_edca_last_param_set.
	 * if mu_edca was preset before and now it disappeared tell
	 * the driver about it.
	 */
	mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
	if (count == ifmgd->wmm_last_param_set &&
	    mu_edca_count == ifmgd->mu_edca_last_param_set)
1991
		return false;
1992
	ifmgd->wmm_last_param_set = count;
1993
	ifmgd->mu_edca_last_param_set = mu_edca_count;
1994 1995 1996 1997 1998 1999

	pos = wmm_param + 8;
	left = wmm_param_len - 8;

	memset(&params, 0, sizeof(params));

Y
Yoni Divinsky 已提交
2000
	sdata->wmm_acm = 0;
2001 2002 2003
	for (; left >= 4; left -= 4, pos += 4) {
		int aci = (pos[0] >> 5) & 0x03;
		int acm = (pos[0] >> 4) & 0x01;
K
Kalle Valo 已提交
2004
		bool uapsd = false;
2005 2006

		switch (aci) {
2007
		case 1: /* AC_BK */
2008
			ac = IEEE80211_AC_BK;
J
Johannes Berg 已提交
2009
			if (acm)
Y
Yoni Divinsky 已提交
2010
				sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
K
Kalle Valo 已提交
2011 2012
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
				uapsd = true;
L
Luca Coelho 已提交
2013 2014 2015
			params[ac].mu_edca = !!mu_edca;
			if (mu_edca)
				params[ac].mu_edca_param_rec = mu_edca->ac_bk;
2016
			break;
2017
		case 2: /* AC_VI */
2018
			ac = IEEE80211_AC_VI;
J
Johannes Berg 已提交
2019
			if (acm)
Y
Yoni Divinsky 已提交
2020
				sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
K
Kalle Valo 已提交
2021 2022
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
				uapsd = true;
L
Luca Coelho 已提交
2023 2024 2025
			params[ac].mu_edca = !!mu_edca;
			if (mu_edca)
				params[ac].mu_edca_param_rec = mu_edca->ac_vi;
2026
			break;
2027
		case 3: /* AC_VO */
2028
			ac = IEEE80211_AC_VO;
J
Johannes Berg 已提交
2029
			if (acm)
Y
Yoni Divinsky 已提交
2030
				sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
K
Kalle Valo 已提交
2031 2032
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
				uapsd = true;
L
Luca Coelho 已提交
2033 2034 2035
			params[ac].mu_edca = !!mu_edca;
			if (mu_edca)
				params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2036
			break;
2037
		case 0: /* AC_BE */
2038
		default:
2039
			ac = IEEE80211_AC_BE;
J
Johannes Berg 已提交
2040
			if (acm)
Y
Yoni Divinsky 已提交
2041
				sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
K
Kalle Valo 已提交
2042 2043
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
				uapsd = true;
L
Luca Coelho 已提交
2044 2045 2046
			params[ac].mu_edca = !!mu_edca;
			if (mu_edca)
				params[ac].mu_edca_param_rec = mu_edca->ac_be;
2047 2048 2049
			break;
		}

2050
		params[ac].aifs = pos[0] & 0x0f;
2051

2052
		if (params[ac].aifs < 2) {
2053 2054
			sdata_info(sdata,
				   "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2055 2056
				   params[ac].aifs, aci);
			params[ac].aifs = 2;
2057
		}
2058 2059 2060 2061 2062
		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;
K
Kalle Valo 已提交
2063

2064
		if (params[ac].cw_min == 0 ||
2065
		    params[ac].cw_min > params[ac].cw_max) {
2066 2067 2068 2069 2070
			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;
		}
2071
		ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2072 2073
	}

2074 2075 2076 2077 2078 2079 2080 2081 2082 2083
	/* WMM specification requires all 4 ACIs. */
	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
		if (params[ac].cw_min == 0) {
			sdata_info(sdata,
				   "AP has invalid WMM params (missing AC %d), using defaults\n",
				   ac);
			return false;
		}
	}

2084
	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
J
Johannes Berg 已提交
2085
		mlme_dbg(sdata,
2086 2087 2088 2089 2090 2091 2092 2093
			 "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, &params[ac]))
J
Johannes Berg 已提交
2094
			sdata_err(sdata,
2095 2096
				  "failed to set TX queue parameters for AC %d\n",
				  ac);
2097
	}
2098 2099

	/* enable WMM or activate new settings */
2100
	sdata->vif.bss_conf.qos = true;
2101
	return true;
2102 2103
}

2104 2105 2106 2107
static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
{
	lockdep_assert_held(&sdata->local->mtx);

2108
	sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2109 2110 2111 2112 2113 2114 2115 2116 2117 2118
	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);
}

J
Johannes Berg 已提交
2119 2120
static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
					   u16 capab, bool erp_valid, u8 erp)
2121
{
J
Johannes Berg 已提交
2122
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2123
	struct ieee80211_supported_band *sband;
2124
	u32 changed = 0;
J
Johannes Berg 已提交
2125 2126 2127 2128
	bool use_protection;
	bool use_short_preamble;
	bool use_short_slot;

2129 2130 2131 2132
	sband = ieee80211_get_sband(sdata);
	if (!sband)
		return changed;

J
Johannes Berg 已提交
2133 2134 2135 2136 2137 2138 2139 2140 2141
	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);
2142 2143
	if (sband->band == NL80211_BAND_5GHZ ||
	    sband->band == NL80211_BAND_6GHZ)
2144
		use_short_slot = true;
2145

2146 2147 2148
	if (use_protection != bss_conf->use_cts_prot) {
		bss_conf->use_cts_prot = use_protection;
		changed |= BSS_CHANGED_ERP_CTS_PROT;
2149
	}
2150

2151 2152
	if (use_short_preamble != bss_conf->use_short_preamble) {
		bss_conf->use_short_preamble = use_short_preamble;
2153
		changed |= BSS_CHANGED_ERP_PREAMBLE;
2154
	}
2155

J
Johannes Berg 已提交
2156 2157 2158
	if (use_short_slot != bss_conf->use_short_slot) {
		bss_conf->use_short_slot = use_short_slot;
		changed |= BSS_CHANGED_ERP_SLOT;
2159 2160 2161 2162 2163
	}

	return changed;
}

2164
static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2165
				     struct cfg80211_bss *cbss,
J
Johannes Berg 已提交
2166
				     u32 bss_info_changed)
2167
{
2168
	struct ieee80211_bss *bss = (void *)cbss->priv;
2169
	struct ieee80211_local *local = sdata->local;
2170
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2171

J
Johannes Berg 已提交
2172
	bss_info_changed |= BSS_CHANGED_ASSOC;
2173
	bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2174
		bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2175

2176
	sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2177
		beacon_loss_count * bss_conf->beacon_int));
2178

2179 2180
	sdata->u.mgd.associated = cbss;
	memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2181

2182 2183
	ieee80211_check_rate_mask(sdata);

2184 2185
	sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;

2186 2187
	if (sdata->vif.p2p ||
	    sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2188
		const struct cfg80211_bss_ies *ies;
2189

2190 2191 2192 2193 2194 2195 2196 2197
		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,
J
Janusz Dziedzic 已提交
2198 2199
					(u8 *) &bss_conf->p2p_noa_attr,
					sizeof(bss_conf->p2p_noa_attr));
2200
			if (ret >= 2) {
J
Janusz Dziedzic 已提交
2201 2202
				sdata->u.mgd.p2p_noa_index =
					bss_conf->p2p_noa_attr.index;
2203 2204
				bss_info_changed |= BSS_CHANGED_P2P_PS;
			}
2205
		}
2206
		rcu_read_unlock();
2207 2208
	}

J
Johannes Berg 已提交
2209
	/* just to be sure */
2210
	ieee80211_stop_poll(sdata);
J
Johannes Berg 已提交
2211

2212
	ieee80211_led_assoc(local, 1);
2213

2214
	if (sdata->u.mgd.have_beacon) {
2215 2216 2217 2218 2219 2220 2221
		/*
		 * 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;
2222
		bss_conf->beacon_rate = bss->beacon_rate;
2223
		bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2224
	} else {
2225
		bss_conf->beacon_rate = NULL;
2226
		bss_conf->dtim_period = 0;
2227
	}
2228

2229
	bss_conf->assoc = 1;
2230

2231
	/* Tell the driver to monitor connection quality (if supported) */
2232
	if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2233
	    bss_conf->cqm_rssi_thold)
2234 2235
		bss_info_changed |= BSS_CHANGED_CQM;

2236
	/* Enable ARP filtering */
2237
	if (bss_conf->arp_addr_cnt)
2238 2239
		bss_info_changed |= BSS_CHANGED_ARP_FILTER;

J
Johannes Berg 已提交
2240
	ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2241

J
Johannes Berg 已提交
2242
	mutex_lock(&local->iflist_mtx);
J
Johannes Berg 已提交
2243
	ieee80211_recalc_ps(local);
J
Johannes Berg 已提交
2244
	mutex_unlock(&local->iflist_mtx);
2245

2246
	ieee80211_recalc_smps(sdata);
E
Eliad Peller 已提交
2247 2248
	ieee80211_recalc_ps_vif(sdata);

2249
	netif_carrier_on(sdata->dev);
2250 2251
}

2252
static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2253 2254
				   u16 stype, u16 reason, bool tx,
				   u8 *frame_buf)
2255
{
2256
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2257
	struct ieee80211_local *local = sdata->local;
2258
	u32 changed = 0;
2259

2260
	sdata_assert_lock(sdata);
2261

2262 2263 2264
	if (WARN_ON_ONCE(tx && !frame_buf))
		return;

J
Johannes Berg 已提交
2265 2266 2267
	if (WARN_ON(!ifmgd->associated))
		return;

2268 2269
	ieee80211_stop_poll(sdata);

2270
	ifmgd->associated = NULL;
2271 2272
	netif_carrier_off(sdata->dev);

2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283
	/*
	 * 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;

E
Eliad Peller 已提交
2284 2285 2286
	/* disable per-vif ps */
	ieee80211_recalc_ps_vif(sdata);

2287 2288 2289
	/* make sure ongoing transmission finishes */
	synchronize_net();

2290 2291 2292 2293 2294 2295
	/*
	 * 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.
	 */
2296
	if (tx)
2297
		ieee80211_flush_queues(local, sdata, true);
2298

2299
	/* deauthenticate/disassociate now */
2300 2301 2302 2303 2304 2305 2306 2307 2308
	if (tx || frame_buf) {
		/*
		 * In multi channel scenarios guarantee that the virtual
		 * interface is granted immediate airtime to transmit the
		 * deauthentication frame by calling mgd_prepare_tx, if the
		 * driver requested so.
		 */
		if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
		    !ifmgd->have_beacon)
2309
			drv_mgd_prepare_tx(sdata->local, sdata, 0);
2310

2311 2312 2313
		ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid,
					       ifmgd->bssid, stype, reason,
					       tx, frame_buf);
2314
	}
2315

2316
	/* flush out frame - make sure the deauth was actually sent */
2317
	if (tx)
2318
		ieee80211_flush_queues(local, sdata, false);
2319

2320
	/* clear bssid only after building the needed mgmt frames */
2321
	eth_zero_addr(ifmgd->bssid);
2322

2323 2324
	sdata->vif.bss_conf.ssid_len = 0;

2325
	/* remove AP and TDLS peers */
2326
	sta_info_flush(sdata);
2327 2328

	/* finally reset all BSS / config parameters */
2329 2330 2331
	changed |= ieee80211_reset_erp_info(sdata);

	ieee80211_led_assoc(local, 0);
J
Johannes Berg 已提交
2332 2333
	changed |= BSS_CHANGED_ASSOC;
	sdata->vif.bss_conf.assoc = false;
2334

J
Janusz Dziedzic 已提交
2335 2336 2337
	ifmgd->p2p_noa_index = -1;
	memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
	       sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2338

2339
	/* on the next assoc, re-program HT/VHT parameters */
B
Ben Greear 已提交
2340 2341
	memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
	memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2342 2343
	memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
	memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2344 2345 2346 2347 2348 2349 2350

	/* reset MU-MIMO ownership and group data */
	memset(sdata->vif.bss_conf.mu_group.membership, 0,
	       sizeof(sdata->vif.bss_conf.mu_group.membership));
	memset(sdata->vif.bss_conf.mu_group.position, 0,
	       sizeof(sdata->vif.bss_conf.mu_group.position));
	changed |= BSS_CHANGED_MU_GROUPS;
2351
	sdata->vif.mu_mimo_owner = false;
2352

2353
	sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2354

2355 2356 2357
	del_timer_sync(&local->dynamic_ps_timer);
	cancel_work_sync(&local->dynamic_ps_enable_work);

2358
	/* Disable ARP filtering */
2359
	if (sdata->vif.bss_conf.arp_addr_cnt)
2360 2361
		changed |= BSS_CHANGED_ARP_FILTER;

2362 2363 2364
	sdata->vif.bss_conf.qos = false;
	changed |= BSS_CHANGED_QOS;

2365 2366
	/* The BSSID (not really interesting) and HT changed */
	changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
J
Johannes Berg 已提交
2367
	ieee80211_bss_info_change_notify(sdata, changed);
2368

2369
	/* disassociated - set to defaults now */
2370
	ieee80211_set_wmm_default(sdata, false, false);
2371

2372 2373 2374 2375
	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);
2376

2377
	sdata->vif.bss_conf.dtim_period = 0;
2378 2379
	sdata->vif.bss_conf.beacon_rate = NULL;

2380
	ifmgd->have_beacon = false;
2381

2382
	ifmgd->flags = 0;
2383
	mutex_lock(&local->mtx);
2384
	ieee80211_vif_release_channel(sdata);
2385 2386

	sdata->vif.csa_active = false;
2387
	ifmgd->csa_waiting_bcn = false;
2388
	ifmgd->csa_ignored_same_chan = false;
2389 2390 2391 2392 2393
	if (sdata->csa_block_tx) {
		ieee80211_wake_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
		sdata->csa_block_tx = false;
	}
2394
	mutex_unlock(&local->mtx);
2395

2396 2397 2398 2399
	/* existing TX TSPEC sessions no longer exist */
	memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
	cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);

2400
	sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2401
}
2402

2403 2404 2405
static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2406
	struct ieee80211_local *local = sdata->local;
2407

2408
	mutex_lock(&local->mtx);
2409 2410
	if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
		goto out;
2411

2412
	__ieee80211_stop_poll(sdata);
2413 2414

	mutex_lock(&local->iflist_mtx);
J
Johannes Berg 已提交
2415
	ieee80211_recalc_ps(local);
2416
	mutex_unlock(&local->iflist_mtx);
2417

2418
	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2419
		goto out;
2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430

	/*
	 * 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));
2431 2432
out:
	mutex_unlock(&local->mtx);
2433 2434
}

2435 2436 2437 2438 2439
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;
S
Sara Sharon 已提交
2440
	u16 tid = ieee80211_get_tid(hdr);
2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469
	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);
	}
}

2470
void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2471
			     struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2472
{
2473 2474
	ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);

2475 2476
	if (!ieee80211_is_any_nullfunc(hdr->frame_control) ||
	    !sdata->u.mgd.probe_send_count)
2477 2478
		return;

2479 2480 2481
	if (ack)
		sdata->u.mgd.probe_send_count = 0;
	else
2482 2483
		sdata->u.mgd.nullfunc_failed = true;
	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2484 2485
}

2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499
static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
					  const u8 *src, const u8 *dst,
					  const u8 *ssid, size_t ssid_len,
					  struct ieee80211_channel *channel)
{
	struct sk_buff *skb;

	skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
					ssid, ssid_len, NULL, 0,
					IEEE80211_PROBE_FLAG_DIRECTED);
	if (skb)
		ieee80211_tx_skb(sdata, skb);
}

2500 2501 2502 2503
static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	const u8 *ssid;
2504
	u8 *dst = ifmgd->associated->bssid;
2505
	u8 unicast_limit = max(1, max_probe_tries - 3);
J
Johannes Berg 已提交
2506
	struct sta_info *sta;
2507 2508 2509 2510 2511 2512 2513 2514

	/*
	 * 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;
2515

2516 2517 2518 2519 2520 2521 2522
	/*
	 * 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.
	 */
2523 2524
	ifmgd->probe_send_count++;

J
Johannes Berg 已提交
2525 2526 2527 2528 2529 2530 2531 2532
	if (dst) {
		mutex_lock(&sdata->local->sta_mtx);
		sta = sta_info_get(sdata, dst);
		if (!WARN_ON(!sta))
			ieee80211_check_fast_rx(sta);
		mutex_unlock(&sdata->local->sta_mtx);
	}

2533
	if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2534
		ifmgd->nullfunc_failed = false;
2535 2536 2537 2538
		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
			ifmgd->probe_send_count--;
		else
			ieee80211_send_nullfunc(sdata->local, sdata, false);
2539
	} else {
2540 2541
		int ssid_len;

2542
		rcu_read_lock();
2543
		ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2544 2545 2546 2547 2548
		if (WARN_ON_ONCE(ssid == NULL))
			ssid_len = 0;
		else
			ssid_len = ssid[1];

2549 2550 2551
		ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
					      ssid + 2, ssid_len,
					      ifmgd->associated->channel);
2552
		rcu_read_unlock();
2553
	}
2554

2555
	ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2556
	run_again(sdata, ifmgd->probe_timeout);
2557 2558
}

J
Johannes Berg 已提交
2559 2560
static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
				   bool beacon)
2561 2562
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
2563
	bool already = false;
2564

2565
	if (!ieee80211_sdata_running(sdata))
2566 2567
		return;

2568
	sdata_lock(sdata);
2569 2570 2571 2572

	if (!ifmgd->associated)
		goto out;

2573 2574 2575 2576 2577 2578 2579
	mutex_lock(&sdata->local->mtx);

	if (sdata->local->tmp_channel || sdata->local->scanning) {
		mutex_unlock(&sdata->local->mtx);
		goto out;
	}

2580
	if (beacon) {
J
Johannes Berg 已提交
2581
		mlme_dbg_ratelimited(sdata,
2582 2583
				     "detected beacon loss from AP (missed %d beacons) - probing\n",
				     beacon_loss_count);
J
Johannes Berg 已提交
2584

2585
		ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2586
	}
2587

J
Johannes Berg 已提交
2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598
	/*
	 * 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!
	 */
2599
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
J
Johannes Berg 已提交
2600 2601
		already = true;

E
Eliad Peller 已提交
2602 2603
	ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;

2604 2605
	mutex_unlock(&sdata->local->mtx);

J
Johannes Berg 已提交
2606 2607 2608
	if (already)
		goto out;

2609
	mutex_lock(&sdata->local->iflist_mtx);
J
Johannes Berg 已提交
2610
	ieee80211_recalc_ps(sdata->local);
2611 2612
	mutex_unlock(&sdata->local->iflist_mtx);

2613 2614
	ifmgd->probe_send_count = 0;
	ieee80211_mgd_probe_ap_send(sdata);
2615
 out:
2616
	sdata_unlock(sdata);
2617 2618
}

2619 2620 2621 2622 2623
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;
2624
	struct cfg80211_bss *cbss;
2625 2626
	struct sk_buff *skb;
	const u8 *ssid;
2627
	int ssid_len;
2628 2629 2630 2631

	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
		return NULL;

2632
	sdata_assert_lock(sdata);
2633

2634 2635 2636 2637 2638 2639 2640
	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
2641 2642
		return NULL;

2643
	rcu_read_lock();
2644
	ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2645 2646
	if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN,
		      "invalid SSID element (len=%d)", ssid ? ssid[1] : -1))
2647 2648 2649 2650
		ssid_len = 0;
	else
		ssid_len = ssid[1];

2651
	skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
J
Johannes Berg 已提交
2652
					(u32) -1, cbss->channel,
2653
					ssid + 2, ssid_len,
2654
					NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2655
	rcu_read_unlock();
2656 2657 2658 2659 2660

	return skb;
}
EXPORT_SYMBOL(ieee80211_ap_probereq_get);

2661 2662
static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
					const u8 *buf, size_t len, bool tx,
2663
					u16 reason, bool reconnect)
2664 2665 2666 2667 2668 2669 2670 2671
{
	struct ieee80211_event event = {
		.type = MLME_EVENT,
		.u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
		.u.mlme.reason = reason,
	};

	if (tx)
2672
		cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect);
2673 2674 2675 2676 2677 2678
	else
		cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);

	drv_event_callback(sdata->local, sdata, &event);
}

2679
static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2680
{
2681
	struct ieee80211_local *local = sdata->local;
2682
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2683
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2684
	bool tx;
2685

2686
	sdata_lock(sdata);
2687
	if (!ifmgd->associated) {
2688
		sdata_unlock(sdata);
2689 2690 2691
		return;
	}

2692 2693
	tx = !sdata->csa_block_tx;

2694 2695 2696 2697 2698 2699 2700
	if (!ifmgd->driver_disconnect) {
		/*
		 * AP is probably out of range (or not reachable for another
		 * reason) so remove the bss struct for that AP.
		 */
		cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
	}
2701

2702
	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2703 2704 2705
			       ifmgd->driver_disconnect ?
					WLAN_REASON_DEAUTH_LEAVING :
					WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2706
			       tx, frame_buf);
2707
	mutex_lock(&local->mtx);
2708
	sdata->vif.csa_active = false;
2709
	ifmgd->csa_waiting_bcn = false;
2710 2711 2712 2713 2714
	if (sdata->csa_block_tx) {
		ieee80211_wake_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
		sdata->csa_block_tx = false;
	}
2715
	mutex_unlock(&local->mtx);
2716

2717
	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2718 2719 2720
				    WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
				    ifmgd->reconnect);
	ifmgd->reconnect = false;
2721

2722
	sdata_unlock(sdata);
2723 2724
}

2725
static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
J
Johannes Berg 已提交
2726 2727 2728
{
	struct ieee80211_sub_if_data *sdata =
		container_of(work, struct ieee80211_sub_if_data,
2729
			     u.mgd.beacon_connection_loss_work);
2730 2731
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

2732 2733
	if (ifmgd->associated)
		ifmgd->beacon_loss_count++;
J
Johannes Berg 已提交
2734

2735
	if (ifmgd->connection_loss) {
2736 2737
		sdata_info(sdata, "Connection to AP %pM lost\n",
			   ifmgd->bssid);
2738
		__ieee80211_disconnect(sdata);
2739 2740 2741 2742 2743 2744 2745
		ifmgd->connection_loss = false;
	} else if (ifmgd->driver_disconnect) {
		sdata_info(sdata,
			   "Driver requested disconnection from AP %pM\n",
			   ifmgd->bssid);
		__ieee80211_disconnect(sdata);
		ifmgd->driver_disconnect = false;
2746
	} else {
2747
		ieee80211_mgd_probe_ap(sdata, true);
2748 2749 2750 2751 2752 2753 2754 2755 2756
	}
}

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);

2757
	__ieee80211_disconnect(sdata);
J
Johannes Berg 已提交
2758 2759
}

2760 2761 2762
void ieee80211_beacon_loss(struct ieee80211_vif *vif)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2763
	struct ieee80211_hw *hw = &sdata->local->hw;
2764

J
Johannes Berg 已提交
2765 2766
	trace_api_beacon_loss(sdata);

2767
	sdata->u.mgd.connection_loss = false;
2768
	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2769 2770 2771
}
EXPORT_SYMBOL(ieee80211_beacon_loss);

2772 2773 2774 2775 2776
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;

J
Johannes Berg 已提交
2777 2778
	trace_api_connection_loss(sdata);

2779
	sdata->u.mgd.connection_loss = true;
2780 2781 2782 2783
	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
}
EXPORT_SYMBOL(ieee80211_connection_loss);

2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798
void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
	struct ieee80211_hw *hw = &sdata->local->hw;

	trace_api_disconnect(sdata, reconnect);

	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
		return;

	sdata->u.mgd.driver_disconnect = true;
	sdata->u.mgd.reconnect = reconnect;
	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
}
EXPORT_SYMBOL(ieee80211_disconnect);
2799

J
Johannes Berg 已提交
2800 2801 2802 2803 2804
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;

2805
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
2806 2807

	if (!assoc) {
2808 2809 2810 2811 2812 2813
		/*
		 * 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);
J
Johannes Berg 已提交
2814 2815
		sta_info_destroy_addr(sdata, auth_data->bss->bssid);

2816
		eth_zero_addr(sdata->u.mgd.bssid);
J
Johannes Berg 已提交
2817
		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2818
		sdata->u.mgd.flags = 0;
2819
		mutex_lock(&sdata->local->mtx);
J
Johannes Berg 已提交
2820
		ieee80211_vif_release_channel(sdata);
2821
		mutex_unlock(&sdata->local->mtx);
J
Johannes Berg 已提交
2822 2823
	}

2824
	cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
J
Johannes Berg 已提交
2825 2826 2827 2828
	kfree(auth_data);
	sdata->u.mgd.auth_data = NULL;
}

2829
static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2830
					 bool assoc, bool abandon)
2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847
{
	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;
2848 2849
		sdata->vif.mu_mimo_owner = false;

2850 2851 2852
		mutex_lock(&sdata->local->mtx);
		ieee80211_vif_release_channel(sdata);
		mutex_unlock(&sdata->local->mtx);
2853 2854 2855

		if (abandon)
			cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2856 2857 2858 2859 2860 2861
	}

	kfree(assoc_data);
	sdata->u.mgd.assoc_data = NULL;
}

J
Johannes Berg 已提交
2862 2863 2864
static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
				     struct ieee80211_mgmt *mgmt, size_t len)
{
2865
	struct ieee80211_local *local = sdata->local;
J
Johannes Berg 已提交
2866 2867 2868
	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
	u8 *pos;
	struct ieee802_11_elems elems;
2869
	u32 tx_flags = 0;
J
Johannes Berg 已提交
2870 2871

	pos = mgmt->u.auth.variable;
2872 2873
	ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
			       mgmt->bssid, auth_data->bss->bssid);
J
Johannes Berg 已提交
2874 2875 2876
	if (!elems.challenge)
		return;
	auth_data->expected_transaction = 4;
2877
	drv_mgd_prepare_tx(sdata->local, sdata, 0);
2878
	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2879 2880
		tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
			   IEEE80211_TX_INTFL_MLME_CONN_TX;
2881
	ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
J
Johannes Berg 已提交
2882 2883 2884
			    elems.challenge - 2, elems.challenge_len + 2,
			    auth_data->bss->bssid, auth_data->bss->bssid,
			    auth_data->key, auth_data->key_len,
2885
			    auth_data->key_idx, tx_flags);
J
Johannes Berg 已提交
2886 2887
}

2888 2889 2890
static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
				    const u8 *bssid)
{
2891
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2892
	struct sta_info *sta;
2893
	bool result = true;
2894

2895 2896 2897 2898 2899 2900
	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);

2901 2902 2903 2904 2905
	/* 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);
2906 2907
		result = false;
		goto out;
2908 2909 2910
	}
	if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
		sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2911 2912
		result = false;
		goto out;
2913 2914
	}

2915 2916 2917
out:
	mutex_unlock(&sdata->local->sta_mtx);
	return result;
2918 2919
}

2920 2921
static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
				   struct ieee80211_mgmt *mgmt, size_t len)
J
Johannes Berg 已提交
2922 2923 2924 2925
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	u8 bssid[ETH_ALEN];
	u16 auth_alg, auth_transaction, status_code;
2926 2927 2928 2929
	struct ieee80211_event event = {
		.type = MLME_EVENT,
		.u.mlme.data = AUTH_EVENT,
	};
J
Johannes Berg 已提交
2930

2931
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
2932 2933

	if (len < 24 + 6)
2934
		return;
J
Johannes Berg 已提交
2935 2936

	if (!ifmgd->auth_data || ifmgd->auth_data->done)
2937
		return;
J
Johannes Berg 已提交
2938 2939 2940

	memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);

2941
	if (!ether_addr_equal(bssid, mgmt->bssid))
2942
		return;
J
Johannes Berg 已提交
2943 2944 2945 2946 2947 2948

	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 ||
2949 2950 2951 2952 2953
	    (auth_alg != WLAN_AUTH_SAE &&
	     auth_transaction != ifmgd->auth_data->expected_transaction) ||
	    (auth_alg == WLAN_AUTH_SAE &&
	     (auth_transaction < ifmgd->auth_data->expected_transaction ||
	      auth_transaction > 2))) {
2954 2955 2956 2957
		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);
2958
		return;
2959
	}
J
Johannes Berg 已提交
2960 2961

	if (status_code != WLAN_STATUS_SUCCESS) {
2962 2963 2964
		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);

		if (auth_alg == WLAN_AUTH_SAE &&
2965 2966 2967 2968
		    (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED ||
		     (auth_transaction == 1 &&
		      (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
		       status_code == WLAN_STATUS_SAE_PK))))
2969 2970
			return;

J
Johannes Berg 已提交
2971 2972
		sdata_info(sdata, "%pM denied authentication (status %d)\n",
			   mgmt->sa, status_code);
2973
		ieee80211_destroy_auth_data(sdata, false);
2974 2975 2976
		event.u.mlme.status = MLME_DENIED;
		event.u.mlme.reason = status_code;
		drv_event_callback(sdata->local, sdata, &event);
2977
		return;
J
Johannes Berg 已提交
2978 2979 2980 2981 2982 2983
	}

	switch (ifmgd->auth_data->algorithm) {
	case WLAN_AUTH_OPEN:
	case WLAN_AUTH_LEAP:
	case WLAN_AUTH_FT:
2984
	case WLAN_AUTH_SAE:
2985 2986 2987
	case WLAN_AUTH_FILS_SK:
	case WLAN_AUTH_FILS_SK_PFS:
	case WLAN_AUTH_FILS_PK:
J
Johannes Berg 已提交
2988 2989 2990 2991 2992
		break;
	case WLAN_AUTH_SHARED_KEY:
		if (ifmgd->auth_data->expected_transaction != 4) {
			ieee80211_auth_challenge(sdata, mgmt, len);
			/* need another frame */
2993
			return;
J
Johannes Berg 已提交
2994 2995 2996 2997 2998
		}
		break;
	default:
		WARN_ONCE(1, "invalid auth alg %d",
			  ifmgd->auth_data->algorithm);
2999
		return;
J
Johannes Berg 已提交
3000 3001
	}

3002 3003
	event.u.mlme.status = MLME_SUCCESS;
	drv_event_callback(sdata->local, sdata, &event);
3004 3005 3006 3007
	if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
	    (auth_transaction == 2 &&
	     ifmgd->auth_data->expected_transaction == 2)) {
		if (!ieee80211_mark_sta_auth(sdata, bssid))
3008
			return; /* ignore frame -- wait for timeout */
3009 3010 3011 3012
	} else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
		   auth_transaction == 2) {
		sdata_info(sdata, "SAE peer confirmed\n");
		ifmgd->auth_data->peer_confirmed = true;
3013 3014
	}

3015
	cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
J
Johannes Berg 已提交
3016 3017
}

3018 3019 3020
#define case_WLAN(type) \
	case WLAN_REASON_##type: return #type

3021
const char *ieee80211_get_reason_code_string(u16 reason_code)
3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073
{
	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>";
	}
}
J
Johannes Berg 已提交
3074

3075 3076
static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
				     struct ieee80211_mgmt *mgmt, size_t len)
3077
{
3078
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3079
	u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3080

3081
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
3082

3083
	if (len < 24 + 2)
3084
		return;
3085

3086 3087 3088 3089 3090
	if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
		ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
		return;
	}

3091 3092 3093
	if (ifmgd->associated &&
	    ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
		const u8 *bssid = ifmgd->associated->bssid;
3094

3095 3096 3097
		sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
			   bssid, reason_code,
			   ieee80211_get_reason_code_string(reason_code));
3098

3099
		ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3100

3101
		ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3102
					    reason_code, false);
3103 3104
		return;
	}
3105

3106 3107 3108
	if (ifmgd->assoc_data &&
	    ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
		const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3109

3110 3111 3112 3113 3114
		sdata_info(sdata,
			   "deauthenticated from %pM while associating (Reason: %u=%s)\n",
			   bssid, reason_code,
			   ieee80211_get_reason_code_string(reason_code));

3115
		ieee80211_destroy_assoc_data(sdata, false, true);
3116 3117 3118 3119

		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
		return;
	}
3120 3121 3122
}


3123 3124
static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
				       struct ieee80211_mgmt *mgmt, size_t len)
3125
{
3126
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3127 3128
	u16 reason_code;

3129
	sdata_assert_lock(sdata);
3130

J
Johannes Berg 已提交
3131
	if (len < 24 + 2)
3132
		return;
3133

J
Johannes Berg 已提交
3134
	if (!ifmgd->associated ||
3135
	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3136
		return;
3137 3138 3139

	reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);

3140 3141 3142 3143 3144
	if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
		ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
		return;
	}

3145 3146 3147
	sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
		   mgmt->sa, reason_code,
		   ieee80211_get_reason_code_string(reason_code));
3148

3149 3150
	ieee80211_set_disassoc(sdata, 0, 0, false, NULL);

3151 3152
	ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code,
				    false);
3153 3154
}

3155 3156 3157 3158
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,
3159
				int *min_rate, int *min_rate_index,
3160
				int shift)
3161 3162 3163 3164
{
	int i, j;

	for (i = 0; i < supp_rates_len; i++) {
3165
		int rate = supp_rates[i] & 0x7f;
3166 3167
		bool is_basic = !!(supp_rates[i] & 0x80);

3168
		if ((rate * 5 * (1 << shift)) > 110)
3169 3170 3171
			*have_higher_than_11mbit = true;

		/*
3172 3173
		 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors
		 * since they're not rates.
3174
		 *
3175
		 * Note: Even though the membership selector and the basic
3176 3177 3178
		 *	 rate flag share the same bit, they are not exactly
		 *	 the same.
		 */
3179
		if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3180
		    supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) ||
3181 3182
		    supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) ||
		    supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E))
3183 3184 3185
			continue;

		for (j = 0; j < sband->n_bitrates; j++) {
3186 3187 3188 3189 3190 3191 3192
			struct ieee80211_rate *br;
			int brate;

			br = &sband->bitrates[j];

			brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
			if (brate == rate) {
3193 3194 3195
				*rates |= BIT(j);
				if (is_basic)
					*basic_rates |= BIT(j);
3196 3197
				if ((rate * 5) < *min_rate) {
					*min_rate = rate * 5;
3198 3199 3200 3201 3202 3203 3204
					*min_rate_index = j;
				}
				break;
			}
		}
	}
}
3205

3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218
static bool ieee80211_twt_req_supported(const struct sta_info *sta,
					const struct ieee802_11_elems *elems)
{
	if (elems->ext_capab_len < 10)
		return false;

	if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
		return false;

	return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
		IEEE80211_HE_MAC_CAP0_TWT_RES;
}

3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231
static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
				    struct sta_info *sta,
				    struct ieee802_11_elems *elems)
{
	bool twt = ieee80211_twt_req_supported(sta, elems);

	if (sdata->vif.bss_conf.twt_requester != twt) {
		sdata->vif.bss_conf.twt_requester = twt;
		return BSS_CHANGED_TWT;
	}
	return 0;
}

3232 3233
static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata,
					struct ieee80211_bss_conf *bss_conf,
3234 3235 3236 3237
					struct ieee80211_supported_band *sband,
					struct sta_info *sta)
{
	const struct ieee80211_sta_he_cap *own_he_cap =
3238 3239
		ieee80211_get_he_iftype_cap(sband,
					    ieee80211_vif_type_p2p(&sdata->vif));
3240 3241 3242 3243 3244 3245 3246 3247 3248

	return bss_conf->he_support &&
		(sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
			IEEE80211_HE_MAC_CAP2_BCAST_TWT) &&
		own_he_cap &&
		(own_he_cap->he_cap_elem.mac_cap_info[2] &
			IEEE80211_HE_MAC_CAP2_BCAST_TWT);
}

J
Johannes Berg 已提交
3249 3250
static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
				    struct cfg80211_bss *cbss,
3251 3252
				    struct ieee80211_mgmt *mgmt, size_t len,
				    struct ieee802_11_elems *elems)
3253
{
3254
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3255
	struct ieee80211_local *local = sdata->local;
3256
	struct ieee80211_supported_band *sband;
3257
	struct sta_info *sta;
J
Johannes Berg 已提交
3258
	u16 capab_info, aid;
J
Johannes Berg 已提交
3259
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3260 3261
	const struct cfg80211_bss_ies *bss_ies = NULL;
	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3262
	bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
3263
	bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
J
Johannes Berg 已提交
3264
	u32 changed = 0;
3265
	u8 *pos;
3266
	int err;
3267
	bool ret;
3268

J
Johannes Berg 已提交
3269
	/* AssocResp and ReassocResp have identical structure */
3270

3271
	pos = mgmt->u.assoc_resp.variable;
3272
	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3273 3274 3275 3276
	if (is_s1g) {
		pos = (u8 *) mgmt->u.s1g_assoc_resp.variable;
		aid = 0; /* TODO */
	}
J
Johannes Berg 已提交
3277
	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3278 3279 3280 3281 3282
	ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, elems,
			       mgmt->bssid, assoc_data->bss->bssid);

	if (elems->aid_resp)
		aid = le16_to_cpu(elems->aid_resp->aid);
3283

3284 3285 3286 3287 3288
	/*
	 * The 5 MSB of the AID field are reserved
	 * (802.11-2016 9.4.1.8 AID field)
	 */
	aid &= 0x7ff;
3289

3290 3291 3292
	ifmgd->broken_ap = false;

	if (aid == 0 || aid > IEEE80211_MAX_AID) {
J
Johannes Berg 已提交
3293 3294
		sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
			   aid);
3295 3296 3297 3298
		aid = 0;
		ifmgd->broken_ap = true;
	}

3299
	if (!is_s1g && !elems->supp_rates) {
J
Johannes Berg 已提交
3300
		sdata_info(sdata, "no SuppRates element in AssocResp\n");
J
Johannes Berg 已提交
3301
		return false;
3302 3303
	}

3304
	sdata->vif.bss_conf.aid = aid;
3305
	ifmgd->tdls_chan_switch_prohibited =
3306 3307
		elems->ext_capab && elems->ext_capab_len >= 5 &&
		(elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3308

3309 3310 3311 3312 3313 3314 3315
	/*
	 * 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.
	 */
3316 3317 3318 3319 3320 3321
	if (!is_6ghz &&
	    ((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)))) {
3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334
		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,
3335 3336 3337
				       false, &bss_elems,
				       mgmt->bssid,
				       assoc_data->bss->bssid);
3338
		if (assoc_data->wmm &&
3339 3340
		    !elems->wmm_param && bss_elems.wmm_param) {
			elems->wmm_param = bss_elems.wmm_param;
3341 3342 3343 3344 3345 3346 3347 3348
			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.
		 */
3349
		if (!elems->ht_cap_elem && bss_elems.ht_cap_elem &&
3350
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3351
			elems->ht_cap_elem = bss_elems.ht_cap_elem;
3352 3353 3354
			sdata_info(sdata,
				   "AP bug: HT capability missing from AssocResp\n");
		}
3355
		if (!elems->ht_operation && bss_elems.ht_operation &&
3356
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3357
			elems->ht_operation = bss_elems.ht_operation;
3358 3359 3360
			sdata_info(sdata,
				   "AP bug: HT operation missing from AssocResp\n");
		}
3361
		if (!elems->vht_cap_elem && bss_elems.vht_cap_elem &&
3362
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3363
			elems->vht_cap_elem = bss_elems.vht_cap_elem;
3364 3365 3366
			sdata_info(sdata,
				   "AP bug: VHT capa missing from AssocResp\n");
		}
3367
		if (!elems->vht_operation && bss_elems.vht_operation &&
3368
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3369
			elems->vht_operation = bss_elems.vht_operation;
3370 3371 3372 3373 3374
			sdata_info(sdata,
				   "AP bug: VHT operation missing from AssocResp\n");
		}
	}

3375 3376 3377 3378
	/*
	 * We previously checked these in the beacon/probe response, so
	 * they should be present here. This is just a safety net.
	 */
3379
	if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3380
	    (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
3381
		sdata_info(sdata,
3382 3383 3384
			   "HT AP is missing WMM params or HT capability/operation\n");
		ret = false;
		goto out;
3385 3386
	}

3387
	if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3388
	    (!elems->vht_cap_elem || !elems->vht_operation)) {
3389
		sdata_info(sdata,
3390 3391 3392
			   "VHT AP is missing VHT capability/operation\n");
		ret = false;
		goto out;
3393 3394
	}

3395 3396 3397 3398 3399 3400 3401 3402
	if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
	    !elems->he_6ghz_capa) {
		sdata_info(sdata,
			   "HE 6 GHz AP is missing HE 6 GHz band capability\n");
		ret = false;
		goto out;
	}

3403 3404 3405 3406 3407
	mutex_lock(&sdata->local->sta_mtx);
	/*
	 * station info was already allocated and inserted before
	 * the association and should be available to us
	 */
3408
	sta = sta_info_get(sdata, cbss->bssid);
3409 3410
	if (WARN_ON(!sta)) {
		mutex_unlock(&sdata->local->sta_mtx);
3411 3412
		ret = false;
		goto out;
3413
	}
3414

3415 3416 3417 3418 3419 3420
	sband = ieee80211_get_sband(sdata);
	if (!sband) {
		mutex_unlock(&sdata->local->sta_mtx);
		ret = false;
		goto out;
	}
3421

L
Luca Coelho 已提交
3422
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3423
	    (!elems->he_cap || !elems->he_operation)) {
L
Luca Coelho 已提交
3424 3425 3426 3427 3428 3429 3430
		mutex_unlock(&sdata->local->sta_mtx);
		sdata_info(sdata,
			   "HE AP is missing HE capability/operation\n");
		ret = false;
		goto out;
	}

3431
	/* Set up internal HT/VHT capabilities */
3432
	if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
B
Ben Greear 已提交
3433
		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3434
						  elems->ht_cap_elem, sta);
3435

3436
	if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
M
Mahesh Palivela 已提交
3437
		ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3438
						    elems->vht_cap_elem, sta);
M
Mahesh Palivela 已提交
3439

3440 3441
	if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
	    elems->he_cap) {
L
Luca Coelho 已提交
3442
		ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3443 3444
						  elems->he_cap,
						  elems->he_cap_len,
3445
						  elems->he_6ghz_capa,
L
Luca Coelho 已提交
3446 3447 3448
						  sta);

		bss_conf->he_support = sta->sta.he_cap.has_he;
3449 3450 3451 3452 3453 3454 3455 3456
		if (elems->rsnx && elems->rsnx_len &&
		    (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) &&
		    wiphy_ext_feature_isset(local->hw.wiphy,
					    NL80211_EXT_FEATURE_PROTECTED_TWT))
			bss_conf->twt_protected = true;
		else
			bss_conf->twt_protected = false;

3457
		changed |= ieee80211_recalc_twt_req(sdata, sta, elems);
L
Luca Coelho 已提交
3458 3459
	} else {
		bss_conf->he_support = false;
3460
		bss_conf->twt_requester = false;
3461
		bss_conf->twt_protected = false;
L
Luca Coelho 已提交
3462 3463
	}

3464
	bss_conf->twt_broadcast =
3465
		ieee80211_twt_bcast_support(sdata, bss_conf, sband, sta);
3466

L
Luca Coelho 已提交
3467
	if (bss_conf->he_support) {
3468
		bss_conf->he_bss_color.color =
3469
			le32_get_bits(elems->he_operation->he_oper_params,
3470
				      IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3471 3472 3473
		bss_conf->he_bss_color.partial =
			le32_get_bits(elems->he_operation->he_oper_params,
				      IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
3474 3475 3476
		bss_conf->he_bss_color.enabled =
			!le32_get_bits(elems->he_operation->he_oper_params,
				       IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3477

3478
		if (bss_conf->he_bss_color.enabled)
3479
			changed |= BSS_CHANGED_HE_BSS_COLOR;
L
Luca Coelho 已提交
3480 3481

		bss_conf->htc_trig_based_pkt_ext =
3482
			le32_get_bits(elems->he_operation->he_oper_params,
3483
			      IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
L
Luca Coelho 已提交
3484
		bss_conf->frame_time_rts_th =
3485
			le32_get_bits(elems->he_operation->he_oper_params,
3486
			      IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
L
Luca Coelho 已提交
3487

3488 3489 3490
		bss_conf->uora_exists = !!elems->uora_element;
		if (elems->uora_element)
			bss_conf->uora_ocw_range = elems->uora_element[0];
L
Luca Coelho 已提交
3491

3492 3493
		ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
		ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
L
Luca Coelho 已提交
3494 3495 3496
		/* TODO: OPEN: what happens if BSS color disable is set? */
	}

S
Sara Sharon 已提交
3497 3498 3499 3500 3501 3502 3503 3504
	if (cbss->transmitted_bss) {
		bss_conf->nontransmitted = true;
		ether_addr_copy(bss_conf->transmitter_bssid,
				cbss->transmitted_bss->bssid);
		bss_conf->bssid_indicator = cbss->max_bssid_indicator;
		bss_conf->bssid_index = cbss->bssid_index;
	}

3505 3506 3507 3508 3509 3510
	/*
	 * 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.
	 */
3511

3512 3513 3514 3515 3516
	/*
	 * 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.
	 */
3517 3518
	if (elems->opmode_notif &&
	    !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3519 3520
		u8 nss;

3521
		nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3522 3523 3524 3525 3526
		nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
		nss += 1;
		sta->sta.rx_nss = nss;
	}

3527
	rate_control_rate_init(sta);
3528

3529
	if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
J
Johannes Berg 已提交
3530
		set_sta_flag(sta, WLAN_STA_MFP);
3531 3532 3533 3534
		sta->sta.mfp = true;
	} else {
		sta->sta.mfp = false;
	}
3535

3536 3537
	sta->sta.wme = (elems->wmm_param || elems->s1g_capab) &&
		       local->hw.queues >= IEEE80211_NUM_ACS;
3538

3539
	err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3540 3541 3542
	if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
		err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
	if (err) {
J
Johannes Berg 已提交
3543 3544 3545
		sdata_info(sdata,
			   "failed to move station %pM to desired state\n",
			   sta->sta.addr);
3546 3547
		WARN_ON(__sta_info_destroy(sta));
		mutex_unlock(&sdata->local->sta_mtx);
3548 3549
		ret = false;
		goto out;
3550 3551
	}

3552 3553 3554
	if (sdata->wdev.use_4addr)
		drv_sta_set_4addr(local, sdata, &sta->sta, true);

3555
	mutex_unlock(&sdata->local->sta_mtx);
3556

3557 3558 3559 3560 3561 3562 3563
	/*
	 * 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;
3564
	ifmgd->mu_edca_last_param_set = -1;
3565

3566
	if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3567
		ieee80211_set_wmm_default(sdata, false, false);
3568 3569 3570
	} else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param,
					     elems->wmm_param_len,
					     elems->mu_edca_param_set)) {
3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581
		/* 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;
	}
3582
	changed |= BSS_CHANGED_QOS;
3583

3584
	if (elems->max_idle_period_ie) {
3585
		bss_conf->max_idle_period =
3586
			le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
3587
		bss_conf->protected_keep_alive =
3588
			!!(elems->max_idle_period_ie->idle_options &
3589 3590 3591 3592 3593 3594 3595
			   WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
		changed |= BSS_CHANGED_KEEP_ALIVE;
	} else {
		bss_conf->max_idle_period = 0;
		bss_conf->protected_keep_alive = false;
	}

3596
	/* set assoc capability (AID was already set earlier),
J
Johannes Berg 已提交
3597 3598
	 * ieee80211_set_associated() will tell the driver */
	bss_conf->assoc_capability = capab_info;
3599
	ieee80211_set_associated(sdata, cbss, changed);
3600

3601 3602 3603 3604 3605 3606 3607
	/*
	 * 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);

3608
	/*
J
Johannes Berg 已提交
3609 3610
	 * Start timer to probe the connection to the AP now.
	 * Also start the timer that will detect beacon loss.
3611
	 */
3612
	ieee80211_sta_reset_beacon_monitor(sdata);
3613
	ieee80211_sta_reset_conn_monitor(sdata);
3614

3615 3616 3617 3618
	ret = true;
 out:
	kfree(bss_ies);
	return ret;
3619 3620
}

3621 3622 3623
static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
					 struct ieee80211_mgmt *mgmt,
					 size_t len)
J
Johannes Berg 已提交
3624 3625 3626 3627 3628
{
	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;
3629
	int ac, uapsd_queues = -1;
J
Johannes Berg 已提交
3630 3631
	u8 *pos;
	bool reassoc;
3632
	struct cfg80211_bss *cbss;
3633 3634 3635 3636
	struct ieee80211_event event = {
		.type = MLME_EVENT,
		.u.mlme.data = ASSOC_EVENT,
	};
J
Johannes Berg 已提交
3637

3638
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
3639 3640

	if (!assoc_data)
3641
		return;
3642

3643
	if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3644
		return;
J
Johannes Berg 已提交
3645

3646 3647
	cbss = assoc_data->bss;

J
Johannes Berg 已提交
3648 3649 3650 3651 3652 3653
	/*
	 * AssocResp and ReassocResp have identical structure, so process both
	 * of them in this function.
	 */

	if (len < 24 + 6)
3654
		return;
J
Johannes Berg 已提交
3655

3656
	reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
J
Johannes Berg 已提交
3657 3658
	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
	status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3659
	pos = mgmt->u.assoc_resp.variable;
J
Johannes Berg 已提交
3660
	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3661 3662 3663 3664
	if (cbss->channel->band == NL80211_BAND_S1GHZ) {
		pos = (u8 *) mgmt->u.s1g_assoc_resp.variable;
		aid = 0; /* TODO */
	}
J
Johannes Berg 已提交
3665

J
Johannes Berg 已提交
3666 3667 3668 3669
	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))));
J
Johannes Berg 已提交
3670

3671 3672 3673 3674
	if (assoc_data->fils_kek_len &&
	    fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
		return;

3675 3676
	ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
			       mgmt->bssid, assoc_data->bss->bssid);
J
Johannes Berg 已提交
3677 3678

	if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3679 3680
	    elems.timeout_int &&
	    elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
J
Johannes Berg 已提交
3681
		u32 tu, ms;
3682
		tu = le32_to_cpu(elems.timeout_int->value);
J
Johannes Berg 已提交
3683
		ms = tu * 1024 / 1000;
J
Johannes Berg 已提交
3684 3685 3686
		sdata_info(sdata,
			   "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
			   mgmt->sa, tu, ms);
J
Johannes Berg 已提交
3687
		assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3688
		assoc_data->timeout_started = true;
J
Johannes Berg 已提交
3689
		if (ms > IEEE80211_ASSOC_TIMEOUT)
3690 3691
			run_again(sdata, assoc_data->timeout);
		return;
J
Johannes Berg 已提交
3692 3693 3694
	}

	if (status_code != WLAN_STATUS_SUCCESS) {
J
Johannes Berg 已提交
3695 3696
		sdata_info(sdata, "%pM denied association (code=%d)\n",
			   mgmt->sa, status_code);
3697
		ieee80211_destroy_assoc_data(sdata, false, false);
3698 3699 3700
		event.u.mlme.status = MLME_DENIED;
		event.u.mlme.reason = status_code;
		drv_event_callback(sdata->local, sdata, &event);
J
Johannes Berg 已提交
3701
	} else {
3702
		if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, &elems)) {
J
Johannes Berg 已提交
3703
			/* oops -- internal error -- send timeout for now */
3704
			ieee80211_destroy_assoc_data(sdata, false, false);
3705
			cfg80211_assoc_timeout(sdata->dev, cbss);
3706
			return;
J
Johannes Berg 已提交
3707
		}
3708 3709
		event.u.mlme.status = MLME_SUCCESS;
		drv_event_callback(sdata->local, sdata, &event);
3710
		sdata_info(sdata, "associated\n");
3711 3712 3713 3714 3715 3716

		/*
		 * 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
		 */
3717
		ieee80211_destroy_assoc_data(sdata, true, false);
3718 3719 3720 3721 3722

		/* get uapsd queues configuration */
		uapsd_queues = 0;
		for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
			if (sdata->tx_conf[ac].uapsd)
3723
				uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
J
Johannes Berg 已提交
3724 3725
	}

3726
	cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues,
3727
			       ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
J
Johannes Berg 已提交
3728
}
J
Johannes Berg 已提交
3729

3730
static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
J
Johannes Berg 已提交
3731
				  struct ieee80211_mgmt *mgmt, size_t len,
3732
				  struct ieee80211_rx_status *rx_status)
3733 3734
{
	struct ieee80211_local *local = sdata->local;
3735
	struct ieee80211_bss *bss;
3736
	struct ieee80211_channel *channel;
3737

3738
	sdata_assert_lock(sdata);
3739

3740 3741
	channel = ieee80211_get_channel_khz(local->hw.wiphy,
					ieee80211_rx_status_to_khz(rx_status));
3742
	if (!channel)
3743 3744
		return;

3745
	bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3746 3747
	if (bss) {
		sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3748
		ieee80211_rx_bss_put(local, bss);
3749
	}
3750 3751 3752
}


3753
static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
J
Johannes Berg 已提交
3754
					 struct sk_buff *skb)
3755
{
J
Johannes Berg 已提交
3756
	struct ieee80211_mgmt *mgmt = (void *)skb->data;
3757
	struct ieee80211_if_managed *ifmgd;
J
Johannes Berg 已提交
3758
	struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3759
	struct ieee80211_channel *channel;
J
Johannes Berg 已提交
3760
	size_t baselen, len = skb->len;
3761

3762 3763
	ifmgd = &sdata->u.mgd;

3764
	sdata_assert_lock(sdata);
3765

3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780
	/*
	 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
	 * "If a 6 GHz AP receives a Probe Request frame  and responds with
	 * a Probe Response frame [..], the Address 1 field of the Probe
	 * Response frame shall be set to the broadcast address [..]"
	 * So, on 6GHz band we should also accept broadcast responses.
	 */
	channel = ieee80211_get_channel(sdata->local->hw.wiphy,
					rx_status->freq);
	if (!channel)
		return;

	if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
	    (channel->band != NL80211_BAND_6GHZ ||
	     !is_broadcast_ether_addr(mgmt->da)))
3781 3782
		return; /* ignore ProbeResp to foreign address */

3783 3784 3785 3786
	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
	if (baselen > len)
		return;

3787
	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3788

3789
	if (ifmgd->associated &&
3790
	    ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3791
		ieee80211_reset_ap_probe(sdata);
3792 3793
}

3794 3795 3796
/*
 * This is the canonical list of information elements we care about,
 * the filter code also gives us all changes to the Microsoft OUI
3797 3798 3799
 * (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.
3800 3801 3802 3803 3804 3805 3806 3807 3808 3809
 *
 * 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 =
3810 3811 3812 3813 3814
	(1ULL << WLAN_EID_COUNTRY) |
	(1ULL << WLAN_EID_ERP_INFO) |
	(1ULL << WLAN_EID_CHANNEL_SWITCH) |
	(1ULL << WLAN_EID_PWR_CONSTRAINT) |
	(1ULL << WLAN_EID_HT_CAPABILITY) |
3815 3816
	(1ULL << WLAN_EID_HT_OPERATION) |
	(1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3817

3818 3819 3820 3821 3822
static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
					struct ieee80211_if_managed *ifmgd,
					struct ieee80211_bss_conf *bss_conf,
					struct ieee80211_local *local,
					struct ieee80211_rx_status *rx_status)
3823
{
3824
	/* Track average RSSI from the Beacon frames of the current AP */
3825

3826 3827
	if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
		ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3828
		ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3829
		ifmgd->last_cqm_event_signal = 0;
3830
		ifmgd->count_beacon_signal = 1;
3831
		ifmgd->last_ave_beacon_signal = 0;
3832
	} else {
3833
		ifmgd->count_beacon_signal++;
3834
	}
3835

3836 3837
	ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);

3838 3839
	if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3840
		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3841
		int last_sig = ifmgd->last_ave_beacon_signal;
3842 3843 3844
		struct ieee80211_event event = {
			.type = RSSI_EVENT,
		};
3845 3846 3847 3848 3849 3850 3851 3852

		/*
		 * 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;
3853 3854
			event.u.rssi.data = RSSI_EVENT_HIGH;
			drv_event_callback(local, sdata, &event);
3855 3856 3857 3858
		} else if (sig < ifmgd->rssi_min_thold &&
			   (last_sig >= ifmgd->rssi_max_thold ||
			   last_sig == 0)) {
			ifmgd->last_ave_beacon_signal = sig;
3859 3860
			event.u.rssi.data = RSSI_EVENT_LOW;
			drv_event_callback(local, sdata, &event);
3861 3862 3863
		}
	}

3864
	if (bss_conf->cqm_rssi_thold &&
3865
	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3866
	    !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3867
		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3868 3869 3870
		int last_event = ifmgd->last_cqm_event_signal;
		int thold = bss_conf->cqm_rssi_thold;
		int hyst = bss_conf->cqm_rssi_hyst;
3871

3872 3873 3874 3875 3876 3877
		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,
3878
				sig, GFP_KERNEL);
3879 3880 3881 3882 3883 3884
		} 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,
3885
				sig, GFP_KERNEL);
3886 3887 3888
		}
	}

3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911
	if (bss_conf->cqm_rssi_low &&
	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
		int last_event = ifmgd->last_cqm_event_signal;
		int low = bss_conf->cqm_rssi_low;
		int high = bss_conf->cqm_rssi_high;

		if (sig < low &&
		    (last_event == 0 || last_event >= low)) {
			ifmgd->last_cqm_event_signal = sig;
			ieee80211_cqm_rssi_notify(
				&sdata->vif,
				NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
				sig, GFP_KERNEL);
		} else if (sig > high &&
			   (last_event == 0 || last_event <= high)) {
			ifmgd->last_cqm_event_signal = sig;
			ieee80211_cqm_rssi_notify(
				&sdata->vif,
				NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
				sig, GFP_KERNEL);
		}
	}
3912 3913
}

S
Sara Sharon 已提交
3914 3915 3916 3917 3918 3919 3920 3921 3922 3923
static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
				    struct cfg80211_bss *bss)
{
	if (ether_addr_equal(tx_bssid, bss->bssid))
		return true;
	if (!bss->transmitted_bss)
		return false;
	return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
}

3924
static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3925
				     struct ieee80211_hdr *hdr, size_t len,
3926 3927 3928 3929
				     struct ieee80211_rx_status *rx_status)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3930
	struct ieee80211_mgmt *mgmt = (void *) hdr;
3931 3932 3933 3934 3935 3936 3937 3938 3939
	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;
3940 3941
	u32 ncrc = 0;
	u8 *bssid, *variable = mgmt->u.beacon.variable;
3942 3943 3944 3945 3946
	u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];

	sdata_assert_lock(sdata);

	/* Process beacon from the current BSS */
3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957
	bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type);
	if (ieee80211_is_s1g_beacon(mgmt->frame_control)) {
		struct ieee80211_ext *ext = (void *) mgmt;

		if (ieee80211_is_s1g_short_beacon(ext->frame_control))
			variable = ext->u.s1g_short_beacon.variable;
		else
			variable = ext->u.s1g_beacon.variable;
	}

	baselen = (u8 *) variable - (u8 *) mgmt;
3958 3959 3960 3961 3962 3963 3964 3965 3966 3967
	if (baselen > len)
		return;

	rcu_read_lock();
	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
	if (!chanctx_conf) {
		rcu_read_unlock();
		return;
	}

3968 3969
	if (ieee80211_rx_status_to_khz(rx_status) !=
	    ieee80211_channel_to_khz(chanctx_conf->def.chan)) {
3970 3971 3972 3973 3974 3975 3976
		rcu_read_unlock();
		return;
	}
	chan = chanctx_conf->def.chan;
	rcu_read_unlock();

	if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3977 3978
	    ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) {
		ieee802_11_parse_elems(variable,
3979
				       len - baselen, false, &elems,
3980
				       bssid,
3981
				       ifmgd->assoc_data->bss->bssid);
3982

3983
		ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
S
Sara Sharon 已提交
3984 3985 3986

		if (elems.dtim_period)
			ifmgd->dtim_period = elems.dtim_period;
3987 3988 3989 3990 3991 3992 3993
		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;
S
Sara Sharon 已提交
3994
			sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3995
		}
S
Sara Sharon 已提交
3996 3997 3998 3999

		if (elems.mbssid_config_ie)
			bss_conf->profile_periodicity =
				elems.mbssid_config_ie->profile_periodicity;
4000 4001
		else
			bss_conf->profile_periodicity = 0;
S
Sara Sharon 已提交
4002 4003 4004 4005

		if (elems.ext_capab_len >= 11 &&
		    (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
			bss_conf->ema_ap = true;
4006 4007
		else
			bss_conf->ema_ap = false;
S
Sara Sharon 已提交
4008

4009 4010 4011 4012 4013 4014 4015 4016
		/* 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 ||
4017
	    !ieee80211_rx_our_beacon(bssid,  ifmgd->associated))
4018 4019 4020 4021 4022 4023
		return;
	bssid = ifmgd->associated->bssid;

	if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
		ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
					    local, rx_status);
4024

4025
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
J
Johannes Berg 已提交
4026
		mlme_dbg_ratelimited(sdata,
4027
				     "cancelling AP probe due to a received beacon\n");
4028
		ieee80211_reset_ap_probe(sdata);
4029 4030
	}

J
Johannes Berg 已提交
4031 4032 4033 4034
	/*
	 * Push the beacon loss detection into the future since
	 * we are processing a beacon from the AP just now.
	 */
4035
	ieee80211_sta_reset_beacon_monitor(sdata);
J
Johannes Berg 已提交
4036

4037 4038 4039 4040 4041 4042 4043 4044
	/* TODO: CRC urrently not calculated on S1G Beacon Compatibility
	 * element (which carries the beacon interval). Don't forget to add a
	 * bit to care_about_ies[] above if mac80211 is interested in a
	 * changing S1G element.
	 */
	if (!ieee80211_is_s1g_beacon(hdr->frame_control))
		ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
	ncrc = ieee802_11_parse_elems_crc(variable,
4045
					  len - baselen, false, &elems,
4046 4047
					  care_about_ies, ncrc,
					  mgmt->bssid, bssid);
4048

4049
	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
4050
	    ieee80211_check_tim(elems.tim, elems.tim_len, bss_conf->aid)) {
4051 4052 4053 4054 4055
		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);
4056
			}
4057
			ieee80211_send_nullfunc(local, sdata, false);
4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069
		} 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);
4070 4071
		}
	}
J
Johannes Berg 已提交
4072

4073 4074
	if (sdata->vif.p2p ||
	    sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
J
Janusz Dziedzic 已提交
4075
		struct ieee80211_p2p_noa_attr noa = {};
4076 4077
		int ret;

4078
		ret = cfg80211_get_p2p_attr(variable,
4079 4080
					    len - baselen,
					    IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
4081
					    (u8 *) &noa, sizeof(noa));
J
Janusz Dziedzic 已提交
4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097
		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));
4098 4099 4100 4101 4102
			changed |= BSS_CHANGED_P2P_PS;
			ifmgd->beacon_crc_valid = false;
		}
	}

4103 4104 4105
	if (ifmgd->csa_waiting_bcn)
		ieee80211_chswitch_post_beacon(sdata);

4106 4107 4108 4109 4110 4111 4112 4113
	/*
	 * 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.
	 */
4114 4115
	if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
	    !ieee80211_is_s1g_beacon(hdr->frame_control)) {
4116 4117 4118 4119
		sdata->vif.bss_conf.sync_tsf =
			le64_to_cpu(mgmt->u.beacon.timestamp);
		sdata->vif.bss_conf.sync_device_ts =
			rx_status->device_timestamp;
S
Sara Sharon 已提交
4120
		sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
4121 4122
	}

4123 4124
	if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) ||
	    ieee80211_is_s1g_short_beacon(mgmt->frame_control))
4125
		return;
4126
	ifmgd->beacon_crc = ncrc;
4127
	ifmgd->beacon_crc_valid = true;
4128

4129
	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
4130

4131
	ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
4132
					 rx_status->device_timestamp,
4133 4134
					 &elems, true);

4135 4136
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
	    ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
L
Luca Coelho 已提交
4137 4138
				     elems.wmm_param_len,
				     elems.mu_edca_param_set))
4139 4140
		changed |= BSS_CHANGED_QOS;

4141 4142
	/*
	 * If we haven't had a beacon before, tell the driver about the
4143
	 * DTIM period (and beacon timing if desired) now.
4144
	 */
4145
	if (!ifmgd->have_beacon) {
4146
		/* a few bogus AP send dtim_period = 0 or no TIM IE */
S
Sara Sharon 已提交
4147
		bss_conf->dtim_period = elems.dtim_period ?: 1;
4148

4149 4150
		changed |= BSS_CHANGED_BEACON_INFO;
		ifmgd->have_beacon = true;
4151 4152

		mutex_lock(&local->iflist_mtx);
J
Johannes Berg 已提交
4153
		ieee80211_recalc_ps(local);
4154 4155
		mutex_unlock(&local->iflist_mtx);

4156
		ieee80211_recalc_ps_vif(sdata);
4157 4158
	}

4159
	if (elems.erp_info) {
J
Johannes Berg 已提交
4160 4161 4162 4163
		erp_valid = true;
		erp_value = elems.erp_info[0];
	} else {
		erp_valid = false;
4164
	}
4165 4166 4167 4168 4169

	if (!ieee80211_is_s1g_beacon(hdr->frame_control))
		changed |= ieee80211_handle_bss_capability(sdata,
				le16_to_cpu(mgmt->u.beacon.capab_info),
				erp_valid, erp_value);
4170

4171
	mutex_lock(&local->sta_mtx);
4172 4173
	sta = sta_info_get(sdata, bssid);

4174 4175
	changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);

4176 4177
	if (ieee80211_config_bw(sdata, sta, elems.ht_cap_elem,
				elems.vht_cap_elem, elems.ht_operation,
L
Luca Coelho 已提交
4178
				elems.vht_operation, elems.he_operation,
4179
				elems.s1g_oper, bssid, &changed)) {
4180
		mutex_unlock(&local->sta_mtx);
4181 4182 4183
		sdata_info(sdata,
			   "failed to follow AP %pM bandwidth change, disconnect\n",
			   bssid);
4184 4185 4186
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       WLAN_REASON_DEAUTH_LEAVING,
				       true, deauth_buf);
4187 4188
		ieee80211_report_disconnect(sdata, deauth_buf,
					    sizeof(deauth_buf), true,
4189 4190
					    WLAN_REASON_DEAUTH_LEAVING,
					    false);
4191
		return;
4192
	}
4193 4194 4195

	if (sta && elems.opmode_notif)
		ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4196
					    rx_status->band);
4197
	mutex_unlock(&local->sta_mtx);
4198

4199 4200 4201
	changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
					       elems.country_elem,
					       elems.country_elem_len,
4202 4203
					       elems.pwr_constr_elem,
					       elems.cisco_dtpc_elem);
4204

4205
	ieee80211_bss_info_change_notify(sdata, changed);
4206 4207
}

4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227
void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata,
				 struct sk_buff *skb)
{
	struct ieee80211_rx_status *rx_status;
	struct ieee80211_hdr *hdr;
	u16 fc;

	rx_status = (struct ieee80211_rx_status *) skb->cb;
	hdr = (struct ieee80211_hdr *) skb->data;
	fc = le16_to_cpu(hdr->frame_control);

	sdata_lock(sdata);
	switch (fc & IEEE80211_FCTL_STYPE) {
	case IEEE80211_STYPE_S1G_BEACON:
		ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status);
		break;
	}
	sdata_unlock(sdata);
}

4228 4229
void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
				  struct sk_buff *skb)
4230 4231 4232 4233
{
	struct ieee80211_rx_status *rx_status;
	struct ieee80211_mgmt *mgmt;
	u16 fc;
4234 4235
	struct ieee802_11_elems elems;
	int ies_len;
4236 4237 4238 4239 4240

	rx_status = (struct ieee80211_rx_status *) skb->cb;
	mgmt = (struct ieee80211_mgmt *) skb->data;
	fc = le16_to_cpu(mgmt->frame_control);

4241
	sdata_lock(sdata);
4242

J
Johannes Berg 已提交
4243 4244
	switch (fc & IEEE80211_FCTL_STYPE) {
	case IEEE80211_STYPE_BEACON:
4245 4246
		ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt,
					 skb->len, rx_status);
J
Johannes Berg 已提交
4247 4248 4249 4250 4251
		break;
	case IEEE80211_STYPE_PROBE_RESP:
		ieee80211_rx_mgmt_probe_resp(sdata, skb);
		break;
	case IEEE80211_STYPE_AUTH:
4252
		ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
4253 4254
		break;
	case IEEE80211_STYPE_DEAUTH:
4255
		ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
4256 4257
		break;
	case IEEE80211_STYPE_DISASSOC:
4258
		ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
4259 4260 4261
		break;
	case IEEE80211_STYPE_ASSOC_RESP:
	case IEEE80211_STYPE_REASSOC_RESP:
4262
		ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
4263 4264
		break;
	case IEEE80211_STYPE_ACTION:
4265
		if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4266 4267 4268
			ies_len = skb->len -
				  offsetof(struct ieee80211_mgmt,
					   u.action.u.chan_switch.variable);
4269 4270 4271 4272

			if (ies_len < 0)
				break;

4273
			/* CSA IE cannot be overridden, no need for BSSID */
4274 4275
			ieee802_11_parse_elems(
				mgmt->u.action.u.chan_switch.variable,
4276
				ies_len, true, &elems, mgmt->bssid, NULL);
4277 4278 4279 4280

			if (elems.parse_error)
				break;

4281
			ieee80211_sta_process_chanswitch(sdata,
4282 4283 4284
						 rx_status->mactime,
						 rx_status->device_timestamp,
						 &elems, false);
4285 4286 4287 4288 4289 4290 4291 4292
		} 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;

4293 4294 4295 4296
			/*
			 * extended CSA IE can't be overridden, no need for
			 * BSSID
			 */
4297 4298
			ieee802_11_parse_elems(
				mgmt->u.action.u.ext_chan_switch.variable,
4299
				ies_len, true, &elems, mgmt->bssid, NULL);
4300 4301 4302 4303 4304 4305 4306 4307

			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;

J
Johannes Berg 已提交
4308
			ieee80211_sta_process_chanswitch(sdata,
4309 4310 4311
						 rx_status->mactime,
						 rx_status->device_timestamp,
						 &elems, false);
4312
		}
4313
		break;
4314
	}
4315
	sdata_unlock(sdata);
4316 4317
}

4318
static void ieee80211_sta_timer(struct timer_list *t)
4319
{
J
Johannes Berg 已提交
4320
	struct ieee80211_sub_if_data *sdata =
4321
		from_timer(sdata, t, u.mgd.timer);
4322

4323
	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4324 4325
}

4326 4327
void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
				   u8 *bssid, u8 reason, bool tx)
4328
{
4329
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4330

4331
	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4332
			       tx, frame_buf);
4333

4334
	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4335
				    reason, false);
4336 4337
}

4338
static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
J
Johannes Berg 已提交
4339 4340 4341 4342
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4343
	u32 tx_flags = 0;
4344 4345
	u16 trans = 1;
	u16 status = 0;
4346
	u16 prepare_tx_duration = 0;
J
Johannes Berg 已提交
4347

4348
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
4349 4350 4351 4352 4353 4354 4355

	if (WARN_ON_ONCE(!auth_data))
		return -EINVAL;

	auth_data->tries++;

	if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
J
Johannes Berg 已提交
4356 4357
		sdata_info(sdata, "authentication with %pM timed out\n",
			   auth_data->bss->bssid);
J
Johannes Berg 已提交
4358 4359 4360 4361 4362 4363 4364 4365 4366 4367

		/*
		 * 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;
	}

4368 4369 4370 4371 4372
	if (auth_data->algorithm == WLAN_AUTH_SAE)
		prepare_tx_duration =
			jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);

	drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
J
Johannes Berg 已提交
4373

4374 4375 4376
	sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
		   auth_data->bss->bssid, auth_data->tries,
		   IEEE80211_AUTH_MAX_TRIES);
J
Johannes Berg 已提交
4377

4378
	auth_data->expected_transaction = 2;
4379

4380 4381 4382 4383 4384
	if (auth_data->algorithm == WLAN_AUTH_SAE) {
		trans = auth_data->sae_trans;
		status = auth_data->sae_status;
		auth_data->expected_transaction = trans;
	}
J
Johannes Berg 已提交
4385

4386 4387 4388
	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
		tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
			   IEEE80211_TX_INTFL_MLME_CONN_TX;
J
Johannes Berg 已提交
4389

4390 4391 4392 4393 4394
	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);
J
Johannes Berg 已提交
4395

4396
	if (tx_flags == 0) {
4397 4398 4399 4400 4401
		if (auth_data->algorithm == WLAN_AUTH_SAE)
			auth_data->timeout = jiffies +
				IEEE80211_AUTH_TIMEOUT_SAE;
		else
			auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4402
	} else {
4403 4404
		auth_data->timeout =
			round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4405
	}
J
Johannes Berg 已提交
4406

4407 4408 4409
	auth_data->timeout_started = true;
	run_again(sdata, auth_data->timeout);

J
Johannes Berg 已提交
4410 4411 4412 4413 4414 4415 4416 4417
	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;

4418
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
4419 4420 4421

	assoc_data->tries++;
	if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
J
Johannes Berg 已提交
4422 4423
		sdata_info(sdata, "association with %pM timed out\n",
			   assoc_data->bss->bssid);
J
Johannes Berg 已提交
4424 4425 4426 4427 4428 4429 4430 4431 4432 4433

		/*
		 * 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;
	}

J
Johannes Berg 已提交
4434 4435 4436
	sdata_info(sdata, "associate with %pM (try %d/%d)\n",
		   assoc_data->bss->bssid, assoc_data->tries,
		   IEEE80211_ASSOC_MAX_TRIES);
J
Johannes Berg 已提交
4437 4438
	ieee80211_send_assoc(sdata);

4439
	if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4440
		assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4441
		assoc_data->timeout_started = true;
4442
		run_again(sdata, assoc_data->timeout);
4443
	} else {
4444 4445 4446 4447 4448
		assoc_data->timeout =
			round_jiffies_up(jiffies +
					 IEEE80211_ASSOC_TIMEOUT_LONG);
		assoc_data->timeout_started = true;
		run_again(sdata, assoc_data->timeout);
4449
	}
J
Johannes Berg 已提交
4450 4451 4452 4453

	return 0;
}

4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465
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);
}

4466
void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
J
Johannes Berg 已提交
4467 4468
{
	struct ieee80211_local *local = sdata->local;
4469
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
4470

4471
	sdata_lock(sdata);
4472

4473 4474 4475 4476 4477
	if (ifmgd->status_received) {
		__le16 fc = ifmgd->status_fc;
		bool status_acked = ifmgd->status_acked;

		ifmgd->status_received = false;
4478
		if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4479
			if (status_acked) {
4480 4481 4482 4483 4484 4485 4486 4487 4488
				if (ifmgd->auth_data->algorithm ==
				    WLAN_AUTH_SAE)
					ifmgd->auth_data->timeout =
						jiffies +
						IEEE80211_AUTH_TIMEOUT_SAE;
				else
					ifmgd->auth_data->timeout =
						jiffies +
						IEEE80211_AUTH_TIMEOUT_SHORT;
4489
				run_again(sdata, ifmgd->auth_data->timeout);
4490 4491 4492
			} else {
				ifmgd->auth_data->timeout = jiffies - 1;
			}
4493
			ifmgd->auth_data->timeout_started = true;
4494 4495 4496 4497 4498 4499
		} 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;
4500
				run_again(sdata, ifmgd->assoc_data->timeout);
4501 4502 4503
			} else {
				ifmgd->assoc_data->timeout = jiffies - 1;
			}
4504
			ifmgd->assoc_data->timeout_started = true;
4505 4506 4507
		}
	}

4508
	if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
J
Johannes Berg 已提交
4509 4510 4511 4512 4513 4514 4515
	    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);
4516
		} else if (ieee80211_auth(sdata)) {
J
Johannes Berg 已提交
4517
			u8 bssid[ETH_ALEN];
4518 4519 4520 4521 4522
			struct ieee80211_event event = {
				.type = MLME_EVENT,
				.u.mlme.data = AUTH_EVENT,
				.u.mlme.status = MLME_TIMEOUT,
			};
J
Johannes Berg 已提交
4523 4524 4525 4526 4527

			memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);

			ieee80211_destroy_auth_data(sdata, false);

4528
			cfg80211_auth_timeout(sdata->dev, bssid);
4529
			drv_event_callback(sdata->local, sdata, &event);
J
Johannes Berg 已提交
4530
		}
4531
	} else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4532
		run_again(sdata, ifmgd->auth_data->timeout);
J
Johannes Berg 已提交
4533

4534
	if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
J
Johannes Berg 已提交
4535
	    time_after(jiffies, ifmgd->assoc_data->timeout)) {
4536
		if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
J
Johannes Berg 已提交
4537
		    ieee80211_do_assoc(sdata)) {
4538
			struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4539 4540 4541 4542 4543
			struct ieee80211_event event = {
				.type = MLME_EVENT,
				.u.mlme.data = ASSOC_EVENT,
				.u.mlme.status = MLME_TIMEOUT,
			};
J
Johannes Berg 已提交
4544

4545
			ieee80211_destroy_assoc_data(sdata, false, false);
4546
			cfg80211_assoc_timeout(sdata->dev, bss);
4547
			drv_event_callback(sdata->local, sdata, &event);
J
Johannes Berg 已提交
4548
		}
4549
	} else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4550
		run_again(sdata, ifmgd->assoc_data->timeout);
J
Johannes Berg 已提交
4551

4552
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
J
Johannes Berg 已提交
4553
	    ifmgd->associated) {
4554
		u8 bssid[ETH_ALEN];
4555
		int max_tries;
4556

4557
		memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4558

4559
		if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4560
			max_tries = max_nullfunc_tries;
4561
		else
4562
			max_tries = max_probe_tries;
4563

4564 4565 4566
		/* ACK received for nullfunc probing frame */
		if (!ifmgd->probe_send_count)
			ieee80211_reset_ap_probe(sdata);
4567 4568
		else if (ifmgd->nullfunc_failed) {
			if (ifmgd->probe_send_count < max_tries) {
J
Johannes Berg 已提交
4569 4570 4571 4572
				mlme_dbg(sdata,
					 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
					 bssid, ifmgd->probe_send_count,
					 max_tries);
4573 4574
				ieee80211_mgd_probe_ap_send(sdata);
			} else {
J
Johannes Berg 已提交
4575 4576 4577
				mlme_dbg(sdata,
					 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
					 bssid);
4578
				ieee80211_sta_connection_lost(sdata, bssid,
4579 4580
					WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
					false);
4581 4582
			}
		} else if (time_is_after_jiffies(ifmgd->probe_timeout))
4583
			run_again(sdata, ifmgd->probe_timeout);
4584
		else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
J
Johannes Berg 已提交
4585 4586 4587
			mlme_dbg(sdata,
				 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
				 bssid, probe_wait_ms);
4588
			ieee80211_sta_connection_lost(sdata, bssid,
4589
				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4590
		} else if (ifmgd->probe_send_count < max_tries) {
J
Johannes Berg 已提交
4591 4592 4593 4594
			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);
4595 4596
			ieee80211_mgd_probe_ap_send(sdata);
		} else {
J
Johannes Berg 已提交
4597 4598 4599 4600
			/*
			 * We actually lost the connection ... or did we?
			 * Let's make sure!
			 */
4601 4602 4603
			mlme_dbg(sdata,
				 "No probe response from AP %pM after %dms, disconnecting.\n",
				 bssid, probe_wait_ms);
4604

4605
			ieee80211_sta_connection_lost(sdata, bssid,
4606
				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
J
Johannes Berg 已提交
4607 4608 4609
		}
	}

4610
	sdata_unlock(sdata);
4611 4612
}

4613
static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
J
Johannes Berg 已提交
4614 4615
{
	struct ieee80211_sub_if_data *sdata =
4616
		from_timer(sdata, t, u.mgd.bcn_mon_timer);
4617
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
4618

4619
	if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
M
Michal Kazior 已提交
4620 4621
		return;

4622 4623 4624
	if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
		return;

4625
	sdata->u.mgd.connection_loss = false;
4626 4627
	ieee80211_queue_work(&sdata->local->hw,
			     &sdata->u.mgd.beacon_connection_loss_work);
J
Johannes Berg 已提交
4628 4629
}

4630
static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
J
Johannes Berg 已提交
4631 4632
{
	struct ieee80211_sub_if_data *sdata =
4633
		from_timer(sdata, t, u.mgd.conn_mon_timer);
J
Johannes Berg 已提交
4634 4635
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_local *local = sdata->local;
4636 4637
	struct sta_info *sta;
	unsigned long timeout;
J
Johannes Berg 已提交
4638

4639
	if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
M
Michal Kazior 已提交
4640 4641
		return;

4642 4643 4644 4645 4646 4647 4648 4649 4650
	sta = sta_info_get(sdata, ifmgd->bssid);
	if (!sta)
		return;

	timeout = sta->status_stats.last_ack;
	if (time_before(sta->status_stats.last_ack, sta->rx_stats.last_rx))
		timeout = sta->rx_stats.last_rx;
	timeout += IEEE80211_CONNECTION_IDLE_TIME;

4651 4652 4653 4654
	/* If timeout is after now, then update timer to fire at
	 * the later date, but do not actually probe at this time.
	 */
	if (time_is_after_jiffies(timeout)) {
4655 4656 4657 4658
		mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout));
		return;
	}

4659
	ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
J
Johannes Berg 已提交
4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670
}

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);
}

J
Johannes Berg 已提交
4671 4672
static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
{
4673
	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4674
		__ieee80211_stop_poll(sdata);
4675

J
Johannes Berg 已提交
4676
		/* let's probe the connection once */
4677
		if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4678 4679
			ieee80211_queue_work(&sdata->local->hw,
					     &sdata->u.mgd.monitor_work);
4680
	}
J
Johannes Berg 已提交
4681
}
4682

4683
#ifdef CONFIG_PM
4684 4685 4686 4687 4688 4689 4690
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);

4691 4692 4693 4694 4695
	if (ifmgd->auth_data || ifmgd->assoc_data) {
		const u8 *bssid = ifmgd->auth_data ?
				ifmgd->auth_data->bss->bssid :
				ifmgd->assoc_data->bss->bssid;

4696
		/*
4697 4698 4699
		 * 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.
4700
		 */
4701
		ieee80211_send_deauth_disassoc(sdata, bssid, bssid,
4702 4703 4704
					       IEEE80211_STYPE_DEAUTH,
					       WLAN_REASON_DEAUTH_LEAVING,
					       false, frame_buf);
4705
		if (ifmgd->assoc_data)
4706
			ieee80211_destroy_assoc_data(sdata, false, true);
4707 4708
		if (ifmgd->auth_data)
			ieee80211_destroy_auth_data(sdata, false);
4709
		cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4710 4711
				      IEEE80211_DEAUTH_FRAME_LEN,
				      false);
4712 4713
	}

4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741
	/* 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);
	}

4742 4743 4744
	sdata_unlock(sdata);
}

4745 4746 4747 4748
void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

4749
	sdata_lock(sdata);
4750
	if (!ifmgd->associated) {
4751
		sdata_unlock(sdata);
4752 4753 4754 4755 4756 4757 4758 4759 4760 4761
		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);
4762
		sdata_unlock(sdata);
4763 4764
		return;
	}
4765
	sdata_unlock(sdata);
4766 4767 4768
}
#endif

J
Johannes Berg 已提交
4769 4770
/* interface setup */
void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4771
{
4772
	struct ieee80211_if_managed *ifmgd;
J
Johannes Berg 已提交
4773

4774
	ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
4775
	INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4776
	INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4777 4778
	INIT_WORK(&ifmgd->beacon_connection_loss_work,
		  ieee80211_beacon_connection_loss_work);
4779 4780
	INIT_WORK(&ifmgd->csa_connection_drop_work,
		  ieee80211_csa_connection_drop_work);
4781
	INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4782 4783
	INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
			  ieee80211_tdls_peer_del_work);
4784 4785 4786 4787
	timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
	timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
	timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
	timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4788 4789
	INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
			  ieee80211_sta_handle_tspec_ac_params_wk);
J
Johannes Berg 已提交
4790

4791
	ifmgd->flags = 0;
4792
	ifmgd->powersave = sdata->wdev.ps;
4793 4794
	ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
	ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
J
Janusz Dziedzic 已提交
4795
	ifmgd->p2p_noa_index = -1;
J
Johannes Berg 已提交
4796

4797
	if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4798 4799 4800
		ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
	else
		ifmgd->req_smps = IEEE80211_SMPS_OFF;
4801 4802 4803 4804 4805

	/* Setup TDLS data */
	spin_lock_init(&ifmgd->teardown_lock);
	ifmgd->teardown_skb = NULL;
	ifmgd->orig_teardown_skb = NULL;
4806 4807
}

4808 4809
/* scan finished notification */
void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
J
Johannes Berg 已提交
4810
{
4811
	struct ieee80211_sub_if_data *sdata;
J
Johannes Berg 已提交
4812

4813 4814
	/* Restart STA timers */
	rcu_read_lock();
4815 4816 4817 4818
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		if (ieee80211_sdata_running(sdata))
			ieee80211_restart_sta_timer(sdata);
	}
4819 4820
	rcu_read_unlock();
}
J
Johannes Berg 已提交
4821

J
Johannes Berg 已提交
4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833
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;

4834
	ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
J
Johannes Berg 已提交
4835 4836 4837 4838 4839 4840 4841 4842 4843 4844 4845 4846
	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;

4847
	vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
J
Johannes Berg 已提交
4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865
	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;
}

L
Luca Coelho 已提交
4866
static bool
4867 4868
ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata,
				    struct ieee80211_supported_band *sband,
L
Luca Coelho 已提交
4869 4870 4871
				    const struct ieee80211_he_operation *he_op)
{
	const struct ieee80211_sta_he_cap *sta_he_cap =
4872 4873
		ieee80211_get_he_iftype_cap(sband,
					    ieee80211_vif_type_p2p(&sdata->vif));
4874
	u16 ap_min_req_set;
L
Luca Coelho 已提交
4875 4876 4877 4878 4879
	int i;

	if (!sta_he_cap || !he_op)
		return false;

4880 4881
	ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);

L
Luca Coelho 已提交
4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929
	/* Need to go over for 80MHz, 160MHz and for 80+80 */
	for (i = 0; i < 3; i++) {
		const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
			&sta_he_cap->he_mcs_nss_supp;
		u16 sta_mcs_map_rx =
			le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
		u16 sta_mcs_map_tx =
			le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
		u8 nss;
		bool verified = true;

		/*
		 * For each band there is a maximum of 8 spatial streams
		 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
		 * of 2 bits per NSS (1-8), with the values defined in enum
		 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
		 * capabilities aren't less than the AP's minimum requirements
		 * for this HE BSS per SS.
		 * It is enough to find one such band that meets the reqs.
		 */
		for (nss = 8; nss > 0; nss--) {
			u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
			u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
			u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;

			if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
				continue;

			/*
			 * Make sure the HE AP doesn't require MCSs that aren't
			 * supported by the client
			 */
			if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
			    sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
			    (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
				verified = false;
				break;
			}
		}

		if (verified)
			return true;
	}

	/* If here, STA doesn't meet AP's HE min requirements */
	return false;
}

4930 4931
static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
				  struct cfg80211_bss *cbss)
4932 4933 4934
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4935
	const struct ieee80211_ht_cap *ht_cap = NULL;
4936
	const struct ieee80211_ht_operation *ht_oper = NULL;
J
Johannes Berg 已提交
4937
	const struct ieee80211_vht_operation *vht_oper = NULL;
L
Luca Coelho 已提交
4938
	const struct ieee80211_he_operation *he_oper = NULL;
4939
	const struct ieee80211_s1g_oper_ie *s1g_oper = NULL;
4940
	struct ieee80211_supported_band *sband;
4941
	struct cfg80211_chan_def chandef;
4942
	bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
4943
	bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
4944
	struct ieee80211_bss *bss = (void *)cbss->priv;
J
Johannes Berg 已提交
4945
	int ret;
4946 4947
	u32 i;
	bool have_80mhz;
4948

4949 4950
	sband = local->hw.wiphy->bands[cbss->channel->band];

J
Johannes Berg 已提交
4951 4952 4953 4954
	ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
			  IEEE80211_STA_DISABLE_80P80MHZ |
			  IEEE80211_STA_DISABLE_160MHZ);

4955
	/* disable HT/VHT/HE if we don't support them */
4956
	if (!sband->ht_cap.ht_supported && !is_6ghz) {
4957 4958 4959 4960 4961
		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
	}

4962
	if (!sband->vht_cap.vht_supported && is_5ghz) {
4963
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4964 4965
		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
	}
4966

4967 4968
	if (!ieee80211_get_he_iftype_cap(sband,
					 ieee80211_vif_type_p2p(&sdata->vif)))
4969 4970
		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;

4971 4972
	rcu_read_lock();

4973
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) {
4974
		const u8 *ht_oper_ie, *ht_cap_ie;
4975

4976
		ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4977 4978
		if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
			ht_oper = (void *)(ht_oper_ie + 2);
4979

4980 4981 4982 4983 4984
		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) {
4985 4986 4987
			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
			ht_oper = NULL;
		}
4988 4989
	}

4990
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) {
4991
		const u8 *vht_oper_ie, *vht_cap;
J
Johannes Berg 已提交
4992

4993 4994
		vht_oper_ie = ieee80211_bss_get_ie(cbss,
						   WLAN_EID_VHT_OPERATION);
J
Johannes Berg 已提交
4995 4996 4997 4998
		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;
J
Johannes Berg 已提交
4999
			sdata_info(sdata,
5000
				   "AP advertised VHT without HT, disabling HT/VHT/HE\n");
5001 5002
			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5003
			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5004
		}
5005 5006 5007 5008 5009 5010

		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;
		}
5011 5012
	}

5013
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
L
Luca Coelho 已提交
5014 5015 5016 5017 5018 5019 5020
		const struct cfg80211_bss_ies *ies;
		const u8 *he_oper_ie;

		ies = rcu_dereference(cbss->ies);
		he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
						  ies->data, ies->len);
		if (he_oper_ie &&
5021
		    he_oper_ie[1] >= ieee80211_he_oper_size(&he_oper_ie[3]))
L
Luca Coelho 已提交
5022 5023 5024 5025
			he_oper = (void *)(he_oper_ie + 3);
		else
			he_oper = NULL;

5026
		if (!ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
L
Luca Coelho 已提交
5027 5028 5029
			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
	}

5030 5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043
	/* 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;

5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055
	if (sband->band == NL80211_BAND_S1GHZ) {
		const u8 *s1g_oper_ie;

		s1g_oper_ie = ieee80211_bss_get_ie(cbss,
						   WLAN_EID_S1G_OPERATION);
		if (s1g_oper_ie && s1g_oper_ie[1] >= sizeof(*s1g_oper))
			s1g_oper = (void *)(s1g_oper_ie + 2);
		else
			sdata_info(sdata,
				   "AP missing S1G operation element?\n");
	}

J
Johannes Berg 已提交
5056 5057
	ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
						     cbss->channel,
5058
						     bss->vht_cap_info,
L
Luca Coelho 已提交
5059
						     ht_oper, vht_oper, he_oper,
5060
						     s1g_oper,
5061
						     &chandef, false);
5062

J
Johannes Berg 已提交
5063 5064
	sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
				      local->rx_chains);
5065

5066 5067
	rcu_read_unlock();

5068 5069 5070 5071 5072
	if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) {
		sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection");
		return -EINVAL;
	}

5073 5074 5075
	/* will change later if needed */
	sdata->smps_mode = IEEE80211_SMPS_OFF;

5076
	mutex_lock(&local->mtx);
J
Johannes Berg 已提交
5077 5078 5079 5080 5081 5082 5083
	/*
	 * 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);
5084 5085 5086 5087

	/* don't downgrade for 5 and 10 MHz channels, though. */
	if (chandef.width == NL80211_CHAN_WIDTH_5 ||
	    chandef.width == NL80211_CHAN_WIDTH_10)
5088
		goto out;
5089

5090
	while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
5091
		ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
5092 5093 5094
		ret = ieee80211_vif_use_channel(sdata, &chandef,
						IEEE80211_CHANCTX_SHARED);
	}
5095 5096
 out:
	mutex_unlock(&local->mtx);
J
Johannes Berg 已提交
5097
	return ret;
5098 5099
}

S
Sara Sharon 已提交
5100 5101 5102 5103 5104 5105 5106 5107 5108 5109 5110 5111 5112 5113 5114 5115 5116 5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 5132 5133
static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
			       u8 *dtim_count, u8 *dtim_period)
{
	const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
	const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
					 ies->len);
	const struct ieee80211_tim_ie *tim = NULL;
	const struct ieee80211_bssid_index *idx;
	bool valid = tim_ie && tim_ie[1] >= 2;

	if (valid)
		tim = (void *)(tim_ie + 2);

	if (dtim_count)
		*dtim_count = valid ? tim->dtim_count : 0;

	if (dtim_period)
		*dtim_period = valid ? tim->dtim_period : 0;

	/* Check if value is overridden by non-transmitted profile */
	if (!idx_ie || idx_ie[1] < 3)
		return valid;

	idx = (void *)(idx_ie + 2);

	if (dtim_count)
		*dtim_count = idx->dtim_count;

	if (dtim_period)
		*dtim_period = idx->dtim_period;

	return true;
}

5134
static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5135 5136
				     struct cfg80211_bss *cbss, bool assoc,
				     bool override)
5137 5138 5139 5140 5141
{
	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;
5142
	struct ieee80211_supported_band *sband;
5143
	bool have_sta = false;
5144 5145
	int err;

5146 5147
	sband = local->hw.wiphy->bands[cbss->channel->band];

5148 5149 5150
	if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
		return -EINVAL;

5151 5152 5153 5154
	/* If a reconfig is happening, bail out */
	if (local->in_reconfig)
		return -EBUSY;

5155 5156 5157 5158 5159 5160 5161 5162 5163 5164 5165
	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;
	}
5166

5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179
	/*
	 * Set up the information for the new channel before setting the
	 * new channel. We can't - completely race-free - change the basic
	 * rates bitmap and the channel (sband) that it refers to, but if
	 * we set it up before we at least avoid calling into the driver's
	 * bss_info_changed() method with invalid information (since we do
	 * call that from changing the channel - only for IDLE and perhaps
	 * some others, but ...).
	 *
	 * So to avoid that, just set up all the new information before the
	 * channel, but tell the driver to apply it only afterwards, since
	 * it might need the new channel for that.
	 */
J
Johannes Berg 已提交
5180
	if (new_sta) {
5181 5182 5183
		u32 rates = 0, basic_rates = 0;
		bool have_higher_than_11mbit;
		int min_rate = INT_MAX, min_rate_index = -1;
J
Johannes Berg 已提交
5184
		const struct cfg80211_bss_ies *ies;
5185
		int shift = ieee80211_vif_get_shift(&sdata->vif);
5186

5187
		/* TODO: S1G Basic Rate Set is expressed elsewhere */
5188 5189
		if (cbss->channel->band == NL80211_BAND_S1GHZ) {
			ieee80211_s1g_sta_rate_init(new_sta);
5190
			goto skip_rates;
5191
		}
5192

5193 5194 5195 5196
		ieee80211_get_rates(sband, bss->supp_rates,
				    bss->supp_rates_len,
				    &rates, &basic_rates,
				    &have_higher_than_11mbit,
5197
				    &min_rate, &min_rate_index,
5198
				    shift);
5199 5200 5201 5202 5203 5204 5205 5206

		/*
		 * 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.
5207 5208
		 * Allow this workaround only in case the AP provided at least
		 * one rate.
5209
		 */
5210 5211 5212 5213 5214 5215 5216
		if (min_rate_index < 0) {
			sdata_info(sdata,
				   "No legacy rates in association response\n");

			sta_info_free(local, new_sta);
			return -EINVAL;
		} else if (!basic_rates) {
J
Johannes Berg 已提交
5217 5218
			sdata_info(sdata,
				   "No basic rates, using min rate instead\n");
5219 5220 5221
			basic_rates = BIT(min_rate_index);
		}

5222 5223 5224 5225 5226 5227
		if (rates)
			new_sta->sta.supp_rates[cbss->channel->band] = rates;
		else
			sdata_info(sdata,
				   "No rates found, keeping mandatory only\n");

5228 5229 5230
		sdata->vif.bss_conf.basic_rates = basic_rates;

		/* cf. IEEE 802.11 9.2.12 */
5231
		if (cbss->channel->band == NL80211_BAND_2GHZ &&
5232 5233 5234 5235 5236
		    have_higher_than_11mbit)
			sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
		else
			sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;

5237
skip_rates:
5238 5239
		memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);

5240 5241
		/* set timing information */
		sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
J
Johannes Berg 已提交
5242
		rcu_read_lock();
5243 5244 5245 5246 5247
		ies = rcu_dereference(cbss->beacon_ies);
		if (ies) {
			sdata->vif.bss_conf.sync_tsf = ies->tsf;
			sdata->vif.bss_conf.sync_device_ts =
				bss->device_ts_beacon;
S
Sara Sharon 已提交
5248 5249 5250 5251

			ieee80211_get_dtim(ies,
					   &sdata->vif.bss_conf.sync_dtim_count,
					   NULL);
5252 5253
		} else if (!ieee80211_hw_check(&sdata->local->hw,
					       TIMING_BEACON_ONLY)) {
5254 5255 5256 5257 5258 5259 5260 5261 5262 5263 5264
			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;
		}
J
Johannes Berg 已提交
5265
		rcu_read_unlock();
5266
	}
5267

5268 5269 5270 5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281
	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) {
		/*
		 * tell driver about BSSID, basic rates and timing
		 * this was set up above, before setting the channel
		 */
5282
		ieee80211_bss_info_change_notify(sdata,
5283 5284
			BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
			BSS_CHANGED_BEACON_INT);
5285 5286

		if (assoc)
J
Johannes Berg 已提交
5287
			sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5288

J
Johannes Berg 已提交
5289 5290
		err = sta_info_insert(new_sta);
		new_sta = NULL;
5291
		if (err) {
J
Johannes Berg 已提交
5292 5293 5294
			sdata_info(sdata,
				   "failed to insert STA entry for the AP (error %d)\n",
				   err);
5295 5296 5297
			return err;
		}
	} else
5298
		WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5299

5300 5301 5302 5303
	/* Cancel scan to ensure that nothing interferes with connection */
	if (local->scanning)
		ieee80211_scan_cancel(local);

5304 5305 5306
	return 0;
}

5307 5308 5309
/* config hooks */
int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
		       struct cfg80211_auth_request *req)
J
Johannes Berg 已提交
5310
{
J
Johannes Berg 已提交
5311 5312 5313
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_mgd_auth_data *auth_data;
5314
	u16 auth_alg;
J
Johannes Berg 已提交
5315
	int err;
5316
	bool cont_auth;
J
Johannes Berg 已提交
5317 5318

	/* prepare auth data structure */
J
Johannes Berg 已提交
5319

5320 5321 5322 5323 5324
	switch (req->auth_type) {
	case NL80211_AUTHTYPE_OPEN_SYSTEM:
		auth_alg = WLAN_AUTH_OPEN;
		break;
	case NL80211_AUTHTYPE_SHARED_KEY:
5325
		if (fips_enabled)
5326
			return -EOPNOTSUPP;
5327 5328 5329 5330 5331 5332 5333 5334
		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;
5335 5336 5337
	case NL80211_AUTHTYPE_SAE:
		auth_alg = WLAN_AUTH_SAE;
		break;
5338 5339 5340 5341 5342 5343 5344 5345 5346
	case NL80211_AUTHTYPE_FILS_SK:
		auth_alg = WLAN_AUTH_FILS_SK;
		break;
	case NL80211_AUTHTYPE_FILS_SK_PFS:
		auth_alg = WLAN_AUTH_FILS_SK_PFS;
		break;
	case NL80211_AUTHTYPE_FILS_PK:
		auth_alg = WLAN_AUTH_FILS_PK;
		break;
5347 5348
	default:
		return -EOPNOTSUPP;
J
Johannes Berg 已提交
5349
	}
5350

5351
	if (ifmgd->assoc_data)
5352 5353
		return -EBUSY;

5354
	auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5355
			    req->ie_len, GFP_KERNEL);
J
Johannes Berg 已提交
5356
	if (!auth_data)
J
Johannes Berg 已提交
5357
		return -ENOMEM;
5358

J
Johannes Berg 已提交
5359
	auth_data->bss = req->bss;
5360

5361
	if (req->auth_data_len >= 4) {
5362 5363 5364 5365 5366 5367
		if (req->auth_type == NL80211_AUTHTYPE_SAE) {
			__le16 *pos = (__le16 *) req->auth_data;

			auth_data->sae_trans = le16_to_cpu(pos[0]);
			auth_data->sae_status = le16_to_cpu(pos[1]);
		}
5368 5369 5370
		memcpy(auth_data->data, req->auth_data + 4,
		       req->auth_data_len - 4);
		auth_data->data_len += req->auth_data_len - 4;
5371 5372
	}

5373 5374 5375 5376 5377 5378 5379
	/* Check if continuing authentication or trying to authenticate with the
	 * same BSS that we were in the process of authenticating with and avoid
	 * removal and re-addition of the STA entry in
	 * ieee80211_prep_connection().
	 */
	cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;

5380
	if (req->ie && req->ie_len) {
5381 5382 5383
		memcpy(&auth_data->data[auth_data->data_len],
		       req->ie, req->ie_len);
		auth_data->data_len += req->ie_len;
J
Johannes Berg 已提交
5384
	}
5385

J
Johannes Berg 已提交
5386
	if (req->key && req->key_len) {
J
Johannes Berg 已提交
5387 5388 5389
		auth_data->key_len = req->key_len;
		auth_data->key_idx = req->key_idx;
		memcpy(auth_data->key, req->key, req->key_len);
J
Johannes Berg 已提交
5390 5391
	}

J
Johannes Berg 已提交
5392
	auth_data->algorithm = auth_alg;
J
Johannes Berg 已提交
5393

J
Johannes Berg 已提交
5394
	/* try to authenticate/probe */
5395

5396 5397 5398 5399 5400 5401 5402
	if (ifmgd->auth_data) {
		if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
			auth_data->peer_confirmed =
				ifmgd->auth_data->peer_confirmed;
		}
		ieee80211_destroy_auth_data(sdata, cont_auth);
	}
5403

J
Johannes Berg 已提交
5404 5405
	/* prep auth_data so we don't go into idle on disassoc */
	ifmgd->auth_data = auth_data;
J
Johannes Berg 已提交
5406

5407 5408 5409 5410 5411 5412 5413 5414 5415
	/* If this is continuation of an ongoing SAE authentication exchange
	 * (i.e., request to send SAE Confirm) and the peer has already
	 * confirmed, mark authentication completed since we are about to send
	 * out SAE Confirm.
	 */
	if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
	    auth_data->peer_confirmed && auth_data->sae_trans == 2)
		ieee80211_mark_sta_auth(sdata, req->bss->bssid);

5416 5417 5418
	if (ifmgd->associated) {
		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];

5419 5420 5421
		sdata_info(sdata,
			   "disconnect from AP %pM for new auth to %pM\n",
			   ifmgd->associated->bssid, req->bss->bssid);
5422 5423 5424 5425
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       WLAN_REASON_UNSPECIFIED,
				       false, frame_buf);

5426 5427
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
5428 5429
					    WLAN_REASON_UNSPECIFIED,
					    false);
5430
	}
J
Johannes Berg 已提交
5431

J
Johannes Berg 已提交
5432
	sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5433

5434
	err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5435
	if (err)
J
Johannes Berg 已提交
5436
		goto err_clear;
J
Johannes Berg 已提交
5437

5438
	err = ieee80211_auth(sdata);
J
Johannes Berg 已提交
5439 5440 5441 5442 5443 5444
	if (err) {
		sta_info_destroy_addr(sdata, req->bss->bssid);
		goto err_clear;
	}

	/* hold our own reference */
5445
	cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5446
	return 0;
J
Johannes Berg 已提交
5447 5448

 err_clear:
5449
	eth_zero_addr(ifmgd->bssid);
5450
	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
J
Johannes Berg 已提交
5451
	ifmgd->auth_data = NULL;
5452 5453 5454
	mutex_lock(&sdata->local->mtx);
	ieee80211_vif_release_channel(sdata);
	mutex_unlock(&sdata->local->mtx);
J
Johannes Berg 已提交
5455 5456
	kfree(auth_data);
	return err;
J
Johannes Berg 已提交
5457 5458
}

5459 5460
int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
			struct cfg80211_assoc_request *req)
5461
{
5462
	bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ;
5463
	bool is_5ghz = req->bss->channel->band == NL80211_BAND_5GHZ;
J
Johannes Berg 已提交
5464
	struct ieee80211_local *local = sdata->local;
5465
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5466
	struct ieee80211_bss *bss = (void *)req->bss->priv;
J
Johannes Berg 已提交
5467
	struct ieee80211_mgd_assoc_data *assoc_data;
5468
	const struct cfg80211_bss_ies *beacon_ies;
J
Johannes Berg 已提交
5469
	struct ieee80211_supported_band *sband;
5470
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
5471
	const u8 *ssidie, *ht_ie, *vht_ie;
5472
	int i, err;
5473
	bool override = false;
5474

J
Johannes Berg 已提交
5475 5476 5477 5478
	assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
	if (!assoc_data)
		return -ENOMEM;

5479 5480
	rcu_read_lock();
	ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5481
	if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) {
5482 5483 5484 5485 5486 5487
		rcu_read_unlock();
		kfree(assoc_data);
		return -EINVAL;
	}
	memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
	assoc_data->ssid_len = ssidie[1];
5488 5489
	memcpy(bss_conf->ssid, assoc_data->ssid, assoc_data->ssid_len);
	bss_conf->ssid_len = assoc_data->ssid_len;
5490 5491
	rcu_read_unlock();

5492 5493 5494
	if (ifmgd->associated) {
		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];

5495 5496 5497
		sdata_info(sdata,
			   "disconnect from AP %pM for new assoc to %pM\n",
			   ifmgd->associated->bssid, req->bss->bssid);
5498 5499 5500 5501
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       WLAN_REASON_UNSPECIFIED,
				       false, frame_buf);

5502 5503
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
5504 5505
					    WLAN_REASON_UNSPECIFIED,
					    false);
5506
	}
J
Johannes Berg 已提交
5507 5508 5509 5510

	if (ifmgd->auth_data && !ifmgd->auth_data->done) {
		err = -EBUSY;
		goto err_free;
J
Johannes Berg 已提交
5511
	}
5512

J
Johannes Berg 已提交
5513 5514 5515 5516
	if (ifmgd->assoc_data) {
		err = -EBUSY;
		goto err_free;
	}
5517

J
Johannes Berg 已提交
5518 5519 5520 5521
	if (ifmgd->auth_data) {
		bool match;

		/* keep sta info, bssid if matching */
5522
		match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
J
Johannes Berg 已提交
5523
		ieee80211_destroy_auth_data(sdata, match);
5524 5525
	}

J
Johannes Berg 已提交
5526
	/* prepare assoc data */
5527

5528 5529
	ifmgd->beacon_crc_valid = false;

5530 5531 5532
	assoc_data->wmm = bss->wmm_used &&
			  (local->hw.queues >= IEEE80211_NUM_ACS);

J
Johannes Berg 已提交
5533 5534 5535 5536 5537 5538 5539
	/*
	 * 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.
	 */
5540
	for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5541 5542
		if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5543
		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5544
			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5545
			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
L
Luca Coelho 已提交
5546
			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5547
			netdev_info(sdata->dev,
5548
				    "disabling HT/VHT/HE due to WEP/TKIP use\n");
5549 5550
		}
	}
5551

J
Johannes Berg 已提交
5552 5553
	sband = local->hw.wiphy->bands[req->bss->channel->band];

5554 5555 5556
	/* also disable HT/VHT/HE if the AP doesn't use WMM */
	if (!bss->wmm_used) {
		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5557
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5558 5559 5560
		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
		netdev_info(sdata->dev,
			    "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
5561 5562
	}

B
Ben Greear 已提交
5563 5564 5565 5566
	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));

5567 5568 5569 5570
	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));

5571 5572 5573 5574
	memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa));
	memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask,
	       sizeof(ifmgd->s1g_capa_mask));

5575
	if (req->ie && req->ie_len) {
J
Johannes Berg 已提交
5576 5577 5578
		memcpy(assoc_data->ie, req->ie, req->ie_len);
		assoc_data->ie_len = req->ie_len;
	}
5579

5580 5581 5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592 5593 5594
	if (req->fils_kek) {
		/* should already be checked in cfg80211 - so warn */
		if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
			err = -EINVAL;
			goto err_free;
		}
		memcpy(assoc_data->fils_kek, req->fils_kek,
		       req->fils_kek_len);
		assoc_data->fils_kek_len = req->fils_kek_len;
	}

	if (req->fils_nonces)
		memcpy(assoc_data->fils_nonces, req->fils_nonces,
		       2 * FILS_NONCE_LEN);

J
Johannes Berg 已提交
5595 5596 5597 5598
	assoc_data->bss = req->bss;
	assoc_data->capability = req->bss->capability;
	assoc_data->supp_rates = bss->supp_rates;
	assoc_data->supp_rates_len = bss->supp_rates_len;
5599

5600
	rcu_read_lock();
5601 5602 5603 5604
	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;
5605
	else if (!is_6ghz)
5606
		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5607 5608 5609 5610
	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));
5611
	else if (is_5ghz)
5612 5613
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT |
				IEEE80211_STA_DISABLE_HE;
5614
	rcu_read_unlock();
5615

5616
	if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5617
		 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5618 5619 5620
	     "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
		sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;

K
Kalle Valo 已提交
5621
	if (bss->wmm_used && bss->uapsd_supported &&
5622
	    (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5623
		assoc_data->uapsd = true;
K
Kalle Valo 已提交
5624 5625
		ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
	} else {
5626
		assoc_data->uapsd = false;
K
Kalle Valo 已提交
5627 5628 5629
		ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
	}

5630
	if (req->prev_bssid)
J
Johannes Berg 已提交
5631
		memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5632 5633 5634 5635 5636 5637 5638 5639 5640

	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;
	}

5641 5642 5643 5644 5645
	if (req->flags & ASSOC_REQ_USE_RRM)
		ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
	else
		ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;

5646 5647 5648 5649 5650
	if (req->crypto.control_port)
		ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
	else
		ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;

5651 5652
	sdata->control_port_protocol = req->crypto.control_port_ethertype;
	sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5653 5654
	sdata->control_port_over_nl80211 =
					req->crypto.control_port_over_nl80211;
5655
	sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
5656 5657
	sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
							sdata->vif.type);
5658

J
Johannes Berg 已提交
5659 5660 5661
	/* kick off associate process */

	ifmgd->assoc_data = assoc_data;
5662
	ifmgd->dtim_period = 0;
5663
	ifmgd->have_beacon = false;
J
Johannes Berg 已提交
5664

5665 5666 5667 5668 5669 5670 5671 5672 5673 5674 5675 5676 5677 5678 5679 5680 5681 5682 5683 5684 5685 5686 5687 5688
	/* 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;
5689
		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5690 5691 5692 5693 5694
	}

	if (req->flags & ASSOC_REQ_DISABLE_VHT)
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;

5695 5696 5697
	if (req->flags & ASSOC_REQ_DISABLE_HE)
		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;

5698
	err = ieee80211_prep_connection(sdata, req->bss, true, override);
5699 5700
	if (err)
		goto err_clear;
J
Johannes Berg 已提交
5701

5702 5703 5704 5705 5706 5707 5708 5709 5710
	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;
	}

5711 5712
	rcu_read_lock();
	beacon_ies = rcu_dereference(req->bss->beacon_ies);
5713

5714
	if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5715 5716 5717 5718 5719 5720 5721 5722
	    !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);
5723
		assoc_data->timeout_started = true;
5724 5725
		assoc_data->need_beacon = true;
	} else if (beacon_ies) {
5726
		const struct element *elem;
5727 5728
		u8 dtim_count = 0;

S
Sara Sharon 已提交
5729 5730 5731
		ieee80211_get_dtim(beacon_ies, &dtim_count,
				   &ifmgd->dtim_period);

5732
		ifmgd->have_beacon = true;
J
Johannes Berg 已提交
5733
		assoc_data->timeout = jiffies;
5734
		assoc_data->timeout_started = true;
5735

5736
		if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5737 5738 5739 5740 5741
			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;
		}
S
Sara Sharon 已提交
5742

5743 5744 5745 5746
		elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
					      beacon_ies->data, beacon_ies->len);
		if (elem && elem->datalen >= 3)
			sdata->vif.bss_conf.profile_periodicity = elem->data[2];
5747 5748
		else
			sdata->vif.bss_conf.profile_periodicity = 0;
S
Sara Sharon 已提交
5749

5750 5751 5752 5753
		elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
					  beacon_ies->data, beacon_ies->len);
		if (elem && elem->datalen >= 11 &&
		    (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
S
Sara Sharon 已提交
5754
			sdata->vif.bss_conf.ema_ap = true;
5755 5756
		else
			sdata->vif.bss_conf.ema_ap = false;
5757 5758
	} else {
		assoc_data->timeout = jiffies;
5759
		assoc_data->timeout_started = true;
J
Johannes Berg 已提交
5760
	}
5761 5762
	rcu_read_unlock();

5763
	run_again(sdata, assoc_data->timeout);
J
Johannes Berg 已提交
5764

P
Paul Stewart 已提交
5765 5766 5767 5768 5769 5770 5771 5772 5773 5774
	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";
J
Johannes Berg 已提交
5775 5776
		sdata_info(sdata, "associating with AP with corrupt %s\n",
			   corrupt_type);
P
Paul Stewart 已提交
5777 5778
	}

5779
	return 0;
J
Johannes Berg 已提交
5780
 err_clear:
5781
	eth_zero_addr(ifmgd->bssid);
5782
	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
J
Johannes Berg 已提交
5783 5784 5785 5786
	ifmgd->assoc_data = NULL;
 err_free:
	kfree(assoc_data);
	return err;
5787 5788
}

5789
int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5790
			 struct cfg80211_deauth_request *req)
5791
{
5792
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5793
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5794
	bool tx = !req->local_state_change;
5795

5796 5797 5798 5799 5800 5801
	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));
5802

5803
		drv_mgd_prepare_tx(sdata->local, sdata, 0);
5804
		ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5805
					       IEEE80211_STYPE_DEAUTH,
5806
					       req->reason_code, tx,
5807
					       frame_buf);
5808
		ieee80211_destroy_auth_data(sdata, false);
5809 5810
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
5811
					    req->reason_code, false);
5812

5813
		return 0;
5814 5815
	}

5816 5817 5818 5819 5820 5821 5822
	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));

5823
		drv_mgd_prepare_tx(sdata->local, sdata, 0);
5824
		ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5825 5826 5827
					       IEEE80211_STYPE_DEAUTH,
					       req->reason_code, tx,
					       frame_buf);
5828
		ieee80211_destroy_assoc_data(sdata, false, true);
5829 5830
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
5831
					    req->reason_code, false);
5832 5833 5834
		return 0;
	}

5835 5836
	if (ifmgd->associated &&
	    ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5837 5838 5839 5840 5841
		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));

5842 5843
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       req->reason_code, tx, frame_buf);
5844 5845
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
5846
					    req->reason_code, false);
5847 5848
		return 0;
	}
5849

5850
	return -ENOTCONN;
5851
}
5852

5853
int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5854
			   struct cfg80211_disassoc_request *req)
J
Johannes Berg 已提交
5855
{
5856
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5857
	u8 bssid[ETH_ALEN];
5858
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
J
Johannes Berg 已提交
5859

J
Johannes Berg 已提交
5860 5861 5862 5863 5864 5865
	/*
	 * 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.
	 */
5866
	if (ifmgd->associated != req->bss)
5867 5868
		return -ENOLINK;

J
Johannes Berg 已提交
5869
	sdata_info(sdata,
5870 5871
		   "disassociating from %pM by local choice (Reason: %u=%s)\n",
		   req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5872

5873
	memcpy(bssid, req->bss->bssid, ETH_ALEN);
5874 5875 5876
	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
			       req->reason_code, !req->local_state_change,
			       frame_buf);
5877

5878
	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5879
				    req->reason_code, false);
5880

5881 5882
	return 0;
}
5883

5884
void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5885 5886 5887
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

5888 5889 5890 5891 5892 5893 5894 5895 5896 5897
	/*
	 * 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);
5898
	cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5899

5900
	sdata_lock(sdata);
5901 5902
	if (ifmgd->assoc_data) {
		struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5903
		ieee80211_destroy_assoc_data(sdata, false, false);
5904 5905
		cfg80211_assoc_timeout(sdata->dev, bss);
	}
5906 5907
	if (ifmgd->auth_data)
		ieee80211_destroy_auth_data(sdata, false);
5908 5909 5910 5911 5912 5913
	spin_lock_bh(&ifmgd->teardown_lock);
	if (ifmgd->teardown_skb) {
		kfree_skb(ifmgd->teardown_skb);
		ifmgd->teardown_skb = NULL;
		ifmgd->orig_teardown_skb = NULL;
	}
5914 5915 5916
	kfree(ifmgd->assoc_req_ies);
	ifmgd->assoc_req_ies = NULL;
	ifmgd->assoc_req_ies_len = 0;
5917
	spin_unlock_bh(&ifmgd->teardown_lock);
5918
	del_timer_sync(&ifmgd->timer);
5919
	sdata_unlock(sdata);
5920 5921
}

5922 5923
void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
			       enum nl80211_cqm_rssi_threshold_event rssi_event,
5924
			       s32 rssi_level,
5925 5926 5927 5928
			       gfp_t gfp)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

5929
	trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
J
Johannes Berg 已提交
5930

5931
	cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5932 5933
}
EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5934 5935 5936 5937 5938 5939 5940 5941 5942 5943

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);