mlme.c 162.5 KB
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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 - 2019 Intel Corporation
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 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

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#include <linux/delay.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,
			     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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			     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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	memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
	ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);

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	chandef->chan = channel;
	chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
	chandef->center_freq1 = channel->center_freq;
	chandef->center_freq2 = 0;

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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;
		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;
		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,
						&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_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 |
			      IEEE80211_STA_DISABLE_VHT;
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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 (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_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 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;
	enum ieee80211_sta_rx_bandwidth new_sta_bw;
	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 ||
	    !ieee80211_get_he_sta_cap(sband))
		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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	/* calculate new channel (type) based on HT/VHT/HE operation IEs */
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	flags = ieee80211_determine_chantype(sdata, sband, chan,
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					     ht_oper, vht_oper, he_oper,
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					     &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,
		   "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
		   ifmgd->bssid, chandef.chan->center_freq, chandef.width,
		   chandef.center_freq1, chandef.center_freq2);

	if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
				      IEEE80211_STA_DISABLE_VHT |
				      IEEE80211_STA_DISABLE_40MHZ |
				      IEEE80211_STA_DISABLE_80P80MHZ |
				      IEEE80211_STA_DISABLE_160MHZ)) ||
	    !cfg80211_chandef_valid(&chandef)) {
		sdata_info(sdata,
			   "AP %pM changed bandwidth in a way we can't support - disconnect\n",
			   ifmgd->bssid);
		return -EINVAL;
	}

	switch (chandef.width) {
	case NL80211_CHAN_WIDTH_20_NOHT:
	case NL80211_CHAN_WIDTH_20:
		new_sta_bw = IEEE80211_STA_RX_BW_20;
		break;
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	case NL80211_CHAN_WIDTH_40:
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		new_sta_bw = IEEE80211_STA_RX_BW_40;
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		break;
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	case NL80211_CHAN_WIDTH_80:
		new_sta_bw = IEEE80211_STA_RX_BW_80;
		break;
	case NL80211_CHAN_WIDTH_80P80:
	case NL80211_CHAN_WIDTH_160:
		new_sta_bw = IEEE80211_STA_RX_BW_160;
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		break;
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	default:
		return -EINVAL;
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	}
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	if (new_sta_bw > sta->cur_max_bandwidth)
		new_sta_bw = sta->cur_max_bandwidth;
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	if (new_sta_bw < sta->sta.bandwidth) {
		sta->sta.bandwidth = new_sta_bw;
		rate_control_rate_update(local, sband, sta,
					 IEEE80211_RC_BW_CHANGED);
	}
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	ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
	if (ret) {
		sdata_info(sdata,
			   "AP %pM changed bandwidth to incompatible one - disconnect\n",
			   ifmgd->bssid);
		return ret;
	}
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	if (new_sta_bw > sta->sta.bandwidth) {
		sta->sta.bandwidth = new_sta_bw;
		rate_control_rate_update(local, sband, sta,
					 IEEE80211_RC_BW_CHANGED);
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	}
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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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		/* fall through */
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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);
}

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/* 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
 */
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static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
				 struct sk_buff *skb,
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				 struct ieee80211_supported_band *sband,
				 struct ieee80211_vht_cap *ap_vht_cap)
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{
534
	struct ieee80211_local *local = sdata->local;
535 536 537
	u8 *pos;
	u32 cap;
	struct ieee80211_sta_vht_cap vht_cap;
538
	u32 mask, ap_bf_sts, our_bf_sts;
539 540 541 542

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

	memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
543
	ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
544 545 546 547

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

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	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
549 550 551 552 553 554
		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;
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		cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
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	}

562 563 564 565 566 567
	/*
	 * 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)))
568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585
		cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
			 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
	else if (!(ap_vht_cap->vht_cap_info &
			cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
		cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;

	/*
	 * If some other vif is using the MU-MIMO capablity we cannot associate
	 * using MU-MIMO - this will lead to contradictions in the group-id
	 * mechanism.
	 * Ownership is defined since association request, in order to avoid
	 * simultaneous associations with MU-MIMO.
	 */
	if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
		bool disable_mu_mimo = false;
		struct ieee80211_sub_if_data *other;

		list_for_each_entry_rcu(other, &local->interfaces, list) {
586
			if (other->vif.mu_mimo_owner) {
587 588 589 590 591 592 593
				disable_mu_mimo = true;
				break;
			}
		}
		if (disable_mu_mimo)
			cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
		else
594
			sdata->vif.mu_mimo_owner = true;
595
	}
596

597 598 599 600 601 602 603 604 605 606
	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;
	}

607
	/* reserve and fill IE */
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	pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
609 610 611
	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;
	u8 he_cap_size;

	he_cap = ieee80211_get_he_sta_cap(sband);
	if (!he_cap)
		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);
}

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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;
647
	u8 *pos, qos_info, *ie_start;
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	size_t offset = 0, noffset;
649
	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;
654
	u32 rates = 0;
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656
	sdata_assert_lock(sdata);
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	rcu_read_lock();
	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
	if (WARN_ON(!chanctx_conf)) {
		rcu_read_unlock();
		return;
	}
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	chan = chanctx_conf->def.chan;
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	rcu_read_unlock();
	sband = local->hw.wiphy->bands[chan->band];
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	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)...
		 */
676 677 678 679
		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.
		 */
686 687 688 689 690
		rates_len = 0;
		for (i = 0; i < sband->n_bitrates; i++) {
			rates |= BIT(i);
			rates_len++;
		}
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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 +
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			assoc_data->ie_len + /* extra IEs */
705
			(assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
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			9, /* WMM */
			GFP_KERNEL);
	if (!skb)
		return;

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

	capab = WLAN_CAPABILITY_ESS;

715
	if (sband->band == NL80211_BAND_2GHZ) {
716 717
		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) &&
724
	    ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
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		capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;

727 728 729
	if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
		capab |= WLAN_CAPABILITY_RADIO_MEASURE;

730
	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);

	if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
		skb_put(skb, 10);
		mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
						  IEEE80211_STYPE_REASSOC_REQ);
		mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
		mgmt->u.reassoc_req.listen_interval =
				cpu_to_le16(local->hw.conf.listen_interval);
		memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
		       ETH_ALEN);
	} else {
		skb_put(skb, 4);
		mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
						  IEEE80211_STYPE_ASSOC_REQ);
		mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
		mgmt->u.assoc_req.listen_interval =
				cpu_to_le16(local->hw.conf.listen_interval);
	}

	/* SSID */
	pos = skb_put(skb, 2 + assoc_data->ssid_len);
755
	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);

	/* 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) {
772 773 774
			int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
						5 * (1 << shift));
			*pos++ = (u8) rate;
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			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) {
787 788 789 790
				int rate;
				rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
						    5 * (1 << shift));
				*pos++ = (u8) rate;
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			}
		}
	}

795 796
	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
	    capab & WLAN_CAPABILITY_RADIO_MEASURE) {
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		pos = skb_put(skb, 4);
		*pos++ = WLAN_EID_PWR_CAPABILITY;
		*pos++ = 2;
		*pos++ = 0; /* min tx power */
801 802
		 /* max tx power */
		*pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
803
	}
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805
	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
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		/* 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*/
		}
	}

817 818 819 820 821 822 823 824 825 826 827 828 829 830 831
	/* Set MBSSID support for HE AP if needed */
	if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
	    !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len) {
		struct element *elem;

		/* we know it's writable, cast away the const */
		elem = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
						  assoc_data->ie,
						  assoc_data->ie_len);

		/* We can probably assume both always true */
		if (elem && elem->datalen >= 3)
			elem->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
	}

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	/* if present, add any custom IEs that go before HT */
833
	if (assoc_data->ie_len) {
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		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,
844 845
			WLAN_EID_FAST_BSS_TRANSITION,	/* reassoc only */
			WLAN_EID_RIC_DATA,		/* reassoc only */
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			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
		};
848 849 850 851
		static const u8 after_ric[] = {
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
			WLAN_EID_HT_CAPABILITY,
			WLAN_EID_BSS_COEX_2040,
852
			/* luckily this is almost always there */
853 854 855 856
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_QOS_TRAFFIC_CAPA,
			WLAN_EID_TIM_BCAST_REQ,
			WLAN_EID_INTERWORKING,
857
			/* 60 GHz (Multi-band, DMG, MMS) can't happen */
858 859 860 861 862 863 864 865 866 867 868
			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);
869
		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
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		offset = noffset;
	}

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	if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
			 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;

877
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
878
		ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
879
				    sband, chan, sdata->smps_mode);
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881 882 883
	/* if present, add any custom IEs that go before VHT */
	if (assoc_data->ie_len) {
		static const u8 before_vht[] = {
884 885 886 887
			/*
			 * no need to list the ones split off before HT
			 * or generated here
			 */
888 889 890 891 892
			WLAN_EID_BSS_COEX_2040,
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_QOS_TRAFFIC_CAPA,
			WLAN_EID_TIM_BCAST_REQ,
			WLAN_EID_INTERWORKING,
893
			/* 60 GHz (Multi-band, DMG, MMS) can't happen */
894
		};
895 896

		/* RIC already taken above, so no need to handle here anymore */
897 898 899
		noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
					     before_vht, ARRAY_SIZE(before_vht),
					     offset);
900
		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
901 902 903
		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;
	}

931
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
932 933
		ieee80211_add_vht_ie(sdata, skb, sband,
				     &assoc_data->ap_vht_cap);
934

935 936 937 938 939 940 941 942 943
	/*
	 * 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;

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	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 */
948
	if (assoc_data->ie_len) {
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		noffset = ieee80211_ie_split_vendor(assoc_data->ie,
						    assoc_data->ie_len,
						    offset);
952
		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
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		offset = noffset;
	}

956 957
	if (assoc_data->wmm) {
		if (assoc_data->uapsd) {
958 959
			qos_info = ifmgd->uapsd_queues;
			qos_info |= (ifmgd->uapsd_max_sp_len <<
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				     IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
		} else {
			qos_info = 0;
		}

965
		pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
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	}

	/* add any remaining custom (i.e. vendor specific here) IEs */
969
	if (assoc_data->ie_len) {
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		noffset = assoc_data->ie_len;
971
		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
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	}

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	if (assoc_data->fils_kek_len &&
	    fils_encrypt_assoc_req(skb, assoc_data) < 0) {
		dev_kfree_skb(skb);
		return;
	}

980 981 982 983 984
	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;

985
	drv_mgd_prepare_tx(local, sdata, 0);
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	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
988
	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
989 990
		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
						IEEE80211_TX_INTFL_MLME_CONN_TX;
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	ieee80211_tx_skb(sdata, skb);
}

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void ieee80211_send_pspoll(struct ieee80211_local *local,
			   struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_pspoll *pspoll;
	struct sk_buff *skb;

1000 1001
	skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
	if (!skb)
1002 1003
		return;

1004 1005
	pspoll = (struct ieee80211_pspoll *) skb->data;
	pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1006

1007 1008
	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
	ieee80211_tx_skb(sdata, skb);
1009 1010
}

1011 1012
void ieee80211_send_nullfunc(struct ieee80211_local *local,
			     struct ieee80211_sub_if_data *sdata,
1013
			     bool powersave)
1014 1015
{
	struct sk_buff *skb;
1016
	struct ieee80211_hdr_3addr *nullfunc;
1017
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1018

L
Luca Coelho 已提交
1019 1020 1021 1022 1023
	/* Don't send NDPs when STA is connected HE */
	if (sdata->vif.type == NL80211_IFTYPE_STATION &&
	    !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
		return;

1024 1025
	skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
		!ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1026
	if (!skb)
1027 1028
		return;

1029
	nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1030
	if (powersave)
1031
		nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1032

1033 1034
	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
					IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1035

1036
	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1037 1038
		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;

1039
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1040 1041
		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;

1042
	ieee80211_tx_skb(sdata, skb);
1043 1044
}

1045 1046 1047 1048 1049 1050 1051 1052 1053 1054
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;

L
Luca Coelho 已提交
1055 1056 1057 1058
	/* Don't send NDPs when connected HE */
	if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
		return;

1059
	skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1060
	if (!skb)
1061
		return;
1062

1063 1064
	skb_reserve(skb, local->hw.extra_tx_headroom);

1065
	nullfunc = skb_put_zero(skb, 30);
1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077
	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);
}

1078 1079 1080 1081 1082
/* 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);
1083
	struct ieee80211_local *local = sdata->local;
1084
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1085
	int ret;
1086

1087
	if (!ieee80211_sdata_running(sdata))
1088 1089
		return;

1090
	sdata_lock(sdata);
1091 1092 1093
	mutex_lock(&local->mtx);
	mutex_lock(&local->chanctx_mtx);

1094 1095
	if (!ifmgd->associated)
		goto out;
1096

1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107
	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) {
1108 1109 1110 1111
		struct ieee80211_supported_band *sband = NULL;
		struct sta_info *mgd_sta = NULL;
		enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;

1112 1113 1114 1115 1116 1117 1118 1119
		/*
		 * 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;

1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161
		if (sdata->vif.bss_conf.chandef.width !=
		    sdata->csa_chandef.width) {
			/*
			 * For managed interface, we need to also update the AP
			 * station bandwidth and align the rate scale algorithm
			 * on the bandwidth change. Here we only consider the
			 * bandwidth of the new channel definition (as channel
			 * switch flow does not have the full HT/VHT/HE
			 * information), assuming that if additional changes are
			 * required they would be done as part of the processing
			 * of the next beacon from the AP.
			 */
			switch (sdata->csa_chandef.width) {
			case NL80211_CHAN_WIDTH_20_NOHT:
			case NL80211_CHAN_WIDTH_20:
			default:
				bw = IEEE80211_STA_RX_BW_20;
				break;
			case NL80211_CHAN_WIDTH_40:
				bw = IEEE80211_STA_RX_BW_40;
				break;
			case NL80211_CHAN_WIDTH_80:
				bw = IEEE80211_STA_RX_BW_80;
				break;
			case NL80211_CHAN_WIDTH_80P80:
			case NL80211_CHAN_WIDTH_160:
				bw = IEEE80211_STA_RX_BW_160;
				break;
			}

			mgd_sta = sta_info_get(sdata, ifmgd->bssid);
			sband =
				local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
		}

		if (sdata->vif.bss_conf.chandef.width >
		    sdata->csa_chandef.width) {
			mgd_sta->sta.bandwidth = bw;
			rate_control_rate_update(local, sband, mgd_sta,
						 IEEE80211_RC_BW_CHANGED);
		}

1162 1163 1164 1165 1166 1167 1168 1169 1170 1171
		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;
		}

1172 1173 1174 1175 1176 1177 1178
		if (sdata->vif.bss_conf.chandef.width <
		    sdata->csa_chandef.width) {
			mgd_sta->sta.bandwidth = bw;
			rate_control_rate_update(local, sband, mgd_sta,
						 IEEE80211_RC_BW_CHANGED);
		}

1179 1180 1181 1182 1183
		goto out;
	}

	if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
					&sdata->csa_chandef)) {
1184
		sdata_info(sdata,
1185
			   "failed to finalize channel switch, disconnecting\n");
1186 1187 1188 1189
		ieee80211_queue_work(&sdata->local->hw,
				     &ifmgd->csa_connection_drop_work);
		goto out;
	}
1190

1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210
	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);
1211

1212 1213 1214 1215 1216
	if (sdata->csa_block_tx) {
		ieee80211_wake_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
		sdata->csa_block_tx = false;
	}
1217

1218 1219 1220
	sdata->vif.csa_active = false;
	ifmgd->csa_waiting_bcn = false;

1221 1222 1223 1224 1225 1226
	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);
1227
		return;
1228
	}
1229 1230

	cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1231 1232
}

1233 1234
void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
{
J
Johannes Berg 已提交
1235 1236
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1237 1238 1239

	trace_api_chswitch_done(sdata, success);
	if (!success) {
1240 1241 1242 1243 1244 1245
		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);
1246 1247 1248 1249
	}
}
EXPORT_SYMBOL(ieee80211_chswitch_done);

1250
static void ieee80211_chswitch_timer(struct timer_list *t)
1251 1252
{
	struct ieee80211_sub_if_data *sdata =
1253
		from_timer(sdata, t, u.mgd.chswitch_timer);
1254

1255
	ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
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 1282 1283
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);
}

1284
static void
J
Johannes Berg 已提交
1285
ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1286 1287
				 u64 timestamp, u32 device_timestamp,
				 struct ieee802_11_elems *elems,
1288
				 bool beacon)
1289
{
1290
	struct ieee80211_local *local = sdata->local;
1291
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1292
	struct cfg80211_bss *cbss = ifmgd->associated;
1293
	struct ieee80211_chanctx_conf *conf;
J
Johannes Berg 已提交
1294
	struct ieee80211_chanctx *chanctx;
1295
	enum nl80211_band current_band;
1296
	struct ieee80211_csa_ie csa_ie;
1297
	struct ieee80211_channel_switch ch_switch;
1298
	int res;
1299

1300
	sdata_assert_lock(sdata);
1301

1302
	if (!cbss)
1303 1304
		return;

1305
	if (local->scanning)
1306 1307
		return;

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

	if (!res) {
		ch_switch.timestamp = timestamp;
		ch_switch.device_timestamp = device_timestamp;
1316
		ch_switch.block_tx =  beacon ? csa_ie.mode : 0;
1317 1318 1319 1320 1321
		ch_switch.chandef = csa_ie.chandef;
		ch_switch.count = csa_ie.count;
		ch_switch.delay = csa_ie.max_switch_time;
	}

1322
	if (res < 0) {
1323
		ieee80211_queue_work(&local->hw,
1324
				     &ifmgd->csa_connection_drop_work);
1325
		return;
1326 1327
	}

1328 1329 1330 1331 1332
	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);
1333 1334 1335 1336 1337
		return;
	} else if (sdata->vif.csa_active || res) {
		/* disregard subsequent announcements if already processing */
		return;
	}
1338

1339
	if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1340 1341 1342
				     IEEE80211_CHAN_DISABLED)) {
		sdata_info(sdata,
			   "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1343
			   ifmgd->associated->bssid,
1344 1345 1346
			   csa_ie.chandef.chan->center_freq,
			   csa_ie.chandef.width, csa_ie.chandef.center_freq1,
			   csa_ie.chandef.center_freq2);
1347 1348 1349 1350 1351
		ieee80211_queue_work(&local->hw,
				     &ifmgd->csa_connection_drop_work);
		return;
	}

1352
	if (cfg80211_chandef_identical(&csa_ie.chandef,
1353 1354
				       &sdata->vif.bss_conf.chandef) &&
	    (!csa_ie.mode || !beacon)) {
1355 1356 1357 1358 1359 1360 1361 1362 1363
		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;
	}

1364 1365 1366 1367 1368 1369 1370 1371
	/*
	 * 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);

1372
	mutex_lock(&local->mtx);
1373
	mutex_lock(&local->chanctx_mtx);
1374 1375 1376 1377 1378
	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");
1379
		goto drop_connection;
1380 1381 1382 1383
	}

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

1384
	if (local->use_chanctx &&
1385
	    !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1386 1387
		sdata_info(sdata,
			   "driver doesn't support chan-switch with channel contexts\n");
1388
		goto drop_connection;
J
Johannes Berg 已提交
1389 1390
	}

1391 1392 1393
	if (drv_pre_channel_switch(sdata, &ch_switch)) {
		sdata_info(sdata,
			   "preparing for channel switch failed, disconnecting\n");
1394
		goto drop_connection;
1395 1396
	}

1397 1398 1399
	res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
					    chanctx->mode, false);
	if (res) {
J
Johannes Berg 已提交
1400
		sdata_info(sdata,
1401 1402
			   "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
			   res);
1403
		goto drop_connection;
J
Johannes Berg 已提交
1404
	}
1405
	mutex_unlock(&local->chanctx_mtx);
J
Johannes Berg 已提交
1406

1407
	sdata->vif.csa_active = true;
1408
	sdata->csa_chandef = csa_ie.chandef;
1409
	sdata->csa_block_tx = ch_switch.block_tx;
1410
	ifmgd->csa_ignored_same_chan = false;
J
Johannes Berg 已提交
1411

1412
	if (sdata->csa_block_tx)
1413 1414
		ieee80211_stop_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
1415
	mutex_unlock(&local->mtx);
1416

1417 1418 1419
	cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
					  csa_ie.count);

1420
	if (local->ops->channel_switch) {
1421
		/* use driver's channel switch callback */
1422
		drv_channel_switch(local, sdata, &ch_switch);
1423 1424 1425 1426
		return;
	}

	/* channel switch handled in software */
1427
	if (csa_ie.count <= 1)
1428
		ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1429
	else
1430
		mod_timer(&ifmgd->chswitch_timer,
1431 1432
			  TU_TO_EXP_TIME((csa_ie.count - 1) *
					 cbss->beacon_interval));
1433 1434
	return;
 drop_connection:
1435 1436 1437 1438 1439 1440 1441 1442
	/*
	 * 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;
1443
	sdata->csa_block_tx = ch_switch.block_tx;
1444

1445 1446 1447
	ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
	mutex_unlock(&local->chanctx_mtx);
	mutex_unlock(&local->mtx);
1448 1449
}

1450 1451 1452 1453 1454 1455
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)
1456
{
1457 1458
	struct ieee80211_country_ie_triplet *triplet;
	int chan = ieee80211_frequency_to_channel(channel->center_freq);
1459
	int i, chan_increment;
1460
	bool have_chan_pwr = false;
1461

1462 1463
	/* Invalid IE */
	if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1464
		return false;
1465

1466 1467 1468 1469 1470 1471 1472
	triplet = (void *)(country_ie + 3);
	country_ie_len -= 3;

	switch (channel->band) {
	default:
		WARN_ON_ONCE(1);
		/* fall through */
1473 1474
	case NL80211_BAND_2GHZ:
	case NL80211_BAND_60GHZ:
1475 1476
		chan_increment = 1;
		break;
1477
	case NL80211_BAND_5GHZ:
1478 1479
		chan_increment = 4;
		break;
1480
	}
1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491

	/* 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;
1492
				*chan_pwr = triplet->chans.max_power;
1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503
				break;
			}
		}
		if (have_chan_pwr)
			break;

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

1504
	if (have_chan_pwr && pwr_constr_elem)
1505
		*pwr_reduction = *pwr_constr_elem;
1506 1507 1508
	else
		*pwr_reduction = 0;

1509 1510 1511
	return have_chan_pwr;
}

1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525
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];
}

1526 1527 1528 1529
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,
1530 1531
				       const u8 *pwr_constr_ie,
				       const u8 *cisco_dtpc_ie)
1532
{
1533 1534 1535
	bool has_80211h_pwr = false, has_cisco_pwr = false;
	int chan_pwr = 0, pwr_reduction_80211h = 0;
	int pwr_level_cisco, pwr_level_80211h;
1536
	int new_ap_level;
1537
	__le16 capab = mgmt->u.probe_resp.capab_info;
1538

1539 1540 1541
	if (country_ie &&
	    (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
	     capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1542 1543 1544
		has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
			sdata, channel, country_ie, country_ie_len,
			pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1545 1546 1547 1548 1549 1550 1551 1552
		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;
1553
	}
1554

1555
	if (!has_80211h_pwr && !has_cisco_pwr)
1556
		return 0;
1557

1558 1559 1560 1561 1562
	/* 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)) {
1563 1564 1565 1566 1567
		new_ap_level = pwr_level_80211h;

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

1568 1569 1570 1571
		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);
1572
	} else {  /* has_cisco_pwr is always true here. */
1573 1574 1575 1576 1577
		new_ap_level = pwr_level_cisco;

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

1578 1579 1580
		sdata_dbg(sdata,
			  "Limiting TX power to %d dBm as advertised by %pM\n",
			  pwr_level_cisco, sdata->u.mgd.bssid);
1581
	}
1582

1583 1584 1585 1586
	sdata->ap_power_level = new_ap_level;
	if (__ieee80211_recalc_txpower(sdata))
		return BSS_CHANGED_TXPOWER;
	return 0;
1587 1588
}

1589 1590 1591 1592 1593 1594
/* 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
1595 1596 1597 1598
	/*
	 * If we are scanning right now then the parameters will
	 * take effect when scan finishes.
	 */
1599
	if (local->scanning)
J
Johannes Berg 已提交
1600 1601
		return;

1602
	if (conf->dynamic_ps_timeout > 0 &&
1603
	    !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1604 1605 1606
		mod_timer(&local->dynamic_ps_timer, jiffies +
			  msecs_to_jiffies(conf->dynamic_ps_timeout));
	} else {
1607
		if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1608
			ieee80211_send_nullfunc(local, sdata, true);
1609

1610 1611
		if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
		    ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1612 1613 1614 1615
			return;

		conf->flags |= IEEE80211_CONF_PS;
		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632
	}
}

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);
	}
}

1633 1634 1635 1636
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
1637
	bool authorized = false;
1638 1639 1640 1641

	if (!mgd->powersave)
		return false;

1642 1643 1644
	if (mgd->broken_ap)
		return false;

1645 1646 1647
	if (!mgd->associated)
		return false;

1648
	if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1649 1650
		return false;

1651
	if (!mgd->have_beacon)
1652 1653
		return false;

1654 1655 1656
	rcu_read_lock();
	sta = sta_info_get(sdata, mgd->bssid);
	if (sta)
J
Johannes Berg 已提交
1657
		authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1658 1659
	rcu_read_unlock();

J
Johannes Berg 已提交
1660
	return authorized;
1661 1662
}

1663
/* need to hold RTNL or interface lock */
J
Johannes Berg 已提交
1664
void ieee80211_recalc_ps(struct ieee80211_local *local)
1665 1666 1667
{
	struct ieee80211_sub_if_data *sdata, *found = NULL;
	int count = 0;
1668
	int timeout;
1669

1670
	if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1671 1672 1673 1674 1675
		local->ps_sdata = NULL;
		return;
	}

	list_for_each_entry(sdata, &local->interfaces, list) {
1676
		if (!ieee80211_sdata_running(sdata))
1677
			continue;
1678 1679 1680 1681 1682 1683 1684 1685
		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;
		}
1686 1687 1688 1689 1690 1691
		if (sdata->vif.type != NL80211_IFTYPE_STATION)
			continue;
		found = sdata;
		count++;
	}

1692
	if (count == 1 && ieee80211_powersave_allowed(found)) {
J
Johannes Berg 已提交
1693
		u8 dtimper = found->u.mgd.dtim_period;
1694

1695
		timeout = local->dynamic_ps_forced_timeout;
J
Johannes Berg 已提交
1696 1697
		if (timeout < 0)
			timeout = 100;
1698
		local->hw.conf.dynamic_ps_timeout = timeout;
1699

J
Johannes Berg 已提交
1700 1701 1702 1703 1704 1705
		/* 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;
1706
	} else {
1707
		local->ps_sdata = NULL;
1708
	}
1709 1710 1711 1712

	ieee80211_change_ps(local);
}

E
Eliad Peller 已提交
1713 1714 1715 1716 1717 1718 1719 1720 1721 1722
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);
	}
}

1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734
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,
1735
					IEEE80211_MAX_QUEUE_MAP,
1736 1737
					IEEE80211_QUEUE_STOP_REASON_PS,
					false);
1738 1739 1740 1741 1742 1743 1744 1745
}

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;
1746
	struct ieee80211_if_managed *ifmgd;
1747 1748
	unsigned long flags;
	int q;
1749 1750 1751 1752 1753

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

1754 1755
	ifmgd = &sdata->u.mgd;

1756 1757 1758
	if (local->hw.conf.flags & IEEE80211_CONF_PS)
		return;

1759
	if (local->hw.conf.dynamic_ps_timeout > 0) {
1760 1761
		/* don't enter PS if TX frames are pending */
		if (drv_tx_frames_pending(local)) {
1762 1763 1764 1765 1766
			mod_timer(&local->dynamic_ps_timer, jiffies +
				  msecs_to_jiffies(
				  local->hw.conf.dynamic_ps_timeout));
			return;
		}
1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784

		/*
		 * 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);
1785 1786
	}

1787
	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1788
	    !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1789
		if (drv_tx_frames_pending(local)) {
1790 1791 1792
			mod_timer(&local->dynamic_ps_timer, jiffies +
				  msecs_to_jiffies(
				  local->hw.conf.dynamic_ps_timeout));
1793
		} else {
1794
			ieee80211_send_nullfunc(local, sdata, true);
1795
			/* Flush to get the tx status of nullfunc frame */
1796
			ieee80211_flush_queues(local, sdata, false);
1797
		}
1798 1799
	}

1800 1801
	if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
	      ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1802 1803 1804 1805 1806
	    (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);
	}
1807 1808
}

1809
void ieee80211_dynamic_ps_timer(struct timer_list *t)
1810
{
1811
	struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1812

1813
	ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1814 1815
}

1816 1817
void ieee80211_dfs_cac_timer_work(struct work_struct *work)
{
1818
	struct delayed_work *delayed_work = to_delayed_work(work);
1819 1820 1821
	struct ieee80211_sub_if_data *sdata =
		container_of(delayed_work, struct ieee80211_sub_if_data,
			     dfs_cac_timer_work);
1822
	struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1823

1824 1825 1826 1827 1828 1829 1830 1831
	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);
1832 1833
}

1834 1835 1836 1837 1838
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;
1839
	bool ret = false;
1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883
	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;
1884 1885 1886 1887 1888 1889
			/* 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.
1890
			 */
1891 1892
			if (non_acm_ac >= IEEE80211_NUM_ACS)
				non_acm_ac = IEEE80211_AC_BK;
1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926
			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
1927
/* MLME */
L
Luca Coelho 已提交
1928 1929 1930 1931 1932
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)
1933
{
1934
	struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1935
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1936
	size_t left;
1937
	int count, mu_edca_count, ac;
J
Johannes Berg 已提交
1938 1939
	const u8 *pos;
	u8 uapsd_queues = 0;
1940

1941
	if (!local->ops->conf_tx)
1942
		return false;
1943

J
Johannes Berg 已提交
1944
	if (local->hw.queues < IEEE80211_NUM_ACS)
1945
		return false;
1946 1947

	if (!wmm_param)
1948
		return false;
1949

1950
	if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1951
		return false;
K
Kalle Valo 已提交
1952 1953

	if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1954
		uapsd_queues = ifmgd->uapsd_queues;
K
Kalle Valo 已提交
1955

1956
	count = wmm_param[6] & 0x0f;
1957 1958 1959 1960 1961 1962 1963
	/* -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)
1964
		return false;
1965
	ifmgd->wmm_last_param_set = count;
1966
	ifmgd->mu_edca_last_param_set = mu_edca_count;
1967 1968 1969 1970 1971 1972

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

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

Y
Yoni Divinsky 已提交
1973
	sdata->wmm_acm = 0;
1974 1975 1976
	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
1977
		bool uapsd = false;
1978 1979

		switch (aci) {
1980
		case 1: /* AC_BK */
1981
			ac = IEEE80211_AC_BK;
J
Johannes Berg 已提交
1982
			if (acm)
Y
Yoni Divinsky 已提交
1983
				sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
K
Kalle Valo 已提交
1984 1985
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
				uapsd = true;
L
Luca Coelho 已提交
1986 1987 1988
			params[ac].mu_edca = !!mu_edca;
			if (mu_edca)
				params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1989
			break;
1990
		case 2: /* AC_VI */
1991
			ac = IEEE80211_AC_VI;
J
Johannes Berg 已提交
1992
			if (acm)
Y
Yoni Divinsky 已提交
1993
				sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
K
Kalle Valo 已提交
1994 1995
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
				uapsd = true;
L
Luca Coelho 已提交
1996 1997 1998
			params[ac].mu_edca = !!mu_edca;
			if (mu_edca)
				params[ac].mu_edca_param_rec = mu_edca->ac_vi;
1999
			break;
2000
		case 3: /* AC_VO */
2001
			ac = IEEE80211_AC_VO;
J
Johannes Berg 已提交
2002
			if (acm)
Y
Yoni Divinsky 已提交
2003
				sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
K
Kalle Valo 已提交
2004 2005
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
				uapsd = true;
L
Luca Coelho 已提交
2006 2007 2008
			params[ac].mu_edca = !!mu_edca;
			if (mu_edca)
				params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2009
			break;
2010
		case 0: /* AC_BE */
2011
		default:
2012
			ac = IEEE80211_AC_BE;
J
Johannes Berg 已提交
2013
			if (acm)
Y
Yoni Divinsky 已提交
2014
				sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
K
Kalle Valo 已提交
2015 2016
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
				uapsd = true;
L
Luca Coelho 已提交
2017 2018 2019
			params[ac].mu_edca = !!mu_edca;
			if (mu_edca)
				params[ac].mu_edca_param_rec = mu_edca->ac_be;
2020 2021 2022
			break;
		}

2023
		params[ac].aifs = pos[0] & 0x0f;
2024

2025
		if (params[ac].aifs < 2) {
2026 2027
			sdata_info(sdata,
				   "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2028 2029
				   params[ac].aifs, aci);
			params[ac].aifs = 2;
2030
		}
2031 2032 2033 2034 2035
		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
2036

2037
		if (params[ac].cw_min == 0 ||
2038
		    params[ac].cw_min > params[ac].cw_max) {
2039 2040 2041 2042 2043
			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;
		}
2044
		ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2045 2046 2047
	}

	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
J
Johannes Berg 已提交
2048
		mlme_dbg(sdata,
2049 2050 2051 2052 2053 2054 2055 2056
			 "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
2057
			sdata_err(sdata,
2058 2059
				  "failed to set TX queue parameters for AC %d\n",
				  ac);
2060
	}
2061 2062

	/* enable WMM or activate new settings */
2063
	sdata->vif.bss_conf.qos = true;
2064
	return true;
2065 2066
}

2067 2068 2069 2070
static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
{
	lockdep_assert_held(&sdata->local->mtx);

2071
	sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2072 2073 2074 2075 2076 2077 2078 2079 2080 2081
	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
2082 2083
static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
					   u16 capab, bool erp_valid, u8 erp)
2084
{
J
Johannes Berg 已提交
2085
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2086
	struct ieee80211_supported_band *sband;
2087
	u32 changed = 0;
J
Johannes Berg 已提交
2088 2089 2090 2091
	bool use_protection;
	bool use_short_preamble;
	bool use_short_slot;

2092 2093 2094 2095
	sband = ieee80211_get_sband(sdata);
	if (!sband)
		return changed;

J
Johannes Berg 已提交
2096 2097 2098 2099 2100 2101 2102 2103 2104
	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);
2105
	if (sband->band == NL80211_BAND_5GHZ)
2106
		use_short_slot = true;
2107

2108 2109 2110
	if (use_protection != bss_conf->use_cts_prot) {
		bss_conf->use_cts_prot = use_protection;
		changed |= BSS_CHANGED_ERP_CTS_PROT;
2111
	}
2112

2113 2114
	if (use_short_preamble != bss_conf->use_short_preamble) {
		bss_conf->use_short_preamble = use_short_preamble;
2115
		changed |= BSS_CHANGED_ERP_PREAMBLE;
2116
	}
2117

J
Johannes Berg 已提交
2118 2119 2120
	if (use_short_slot != bss_conf->use_short_slot) {
		bss_conf->use_short_slot = use_short_slot;
		changed |= BSS_CHANGED_ERP_SLOT;
2121 2122 2123 2124 2125
	}

	return changed;
}

2126
static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2127
				     struct cfg80211_bss *cbss,
J
Johannes Berg 已提交
2128
				     u32 bss_info_changed)
2129
{
2130
	struct ieee80211_bss *bss = (void *)cbss->priv;
2131
	struct ieee80211_local *local = sdata->local;
2132
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2133

J
Johannes Berg 已提交
2134
	bss_info_changed |= BSS_CHANGED_ASSOC;
2135
	bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2136
		bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2137

2138
	sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2139
		beacon_loss_count * bss_conf->beacon_int));
2140

2141 2142
	sdata->u.mgd.associated = cbss;
	memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2143

2144 2145
	ieee80211_check_rate_mask(sdata);

2146 2147
	sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;

2148 2149
	if (sdata->vif.p2p ||
	    sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2150
		const struct cfg80211_bss_ies *ies;
2151

2152 2153 2154 2155 2156 2157 2158 2159
		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
2160 2161
					(u8 *) &bss_conf->p2p_noa_attr,
					sizeof(bss_conf->p2p_noa_attr));
2162
			if (ret >= 2) {
J
Janusz Dziedzic 已提交
2163 2164
				sdata->u.mgd.p2p_noa_index =
					bss_conf->p2p_noa_attr.index;
2165 2166
				bss_info_changed |= BSS_CHANGED_P2P_PS;
			}
2167
		}
2168
		rcu_read_unlock();
2169 2170
	}

J
Johannes Berg 已提交
2171
	/* just to be sure */
2172
	ieee80211_stop_poll(sdata);
J
Johannes Berg 已提交
2173

2174
	ieee80211_led_assoc(local, 1);
2175

2176
	if (sdata->u.mgd.have_beacon) {
2177 2178 2179 2180 2181 2182 2183
		/*
		 * 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;
2184
		bss_conf->beacon_rate = bss->beacon_rate;
2185
		bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2186
	} else {
2187
		bss_conf->beacon_rate = NULL;
2188
		bss_conf->dtim_period = 0;
2189
	}
2190

2191
	bss_conf->assoc = 1;
2192

2193
	/* Tell the driver to monitor connection quality (if supported) */
2194
	if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2195
	    bss_conf->cqm_rssi_thold)
2196 2197
		bss_info_changed |= BSS_CHANGED_CQM;

2198
	/* Enable ARP filtering */
2199
	if (bss_conf->arp_addr_cnt)
2200 2201
		bss_info_changed |= BSS_CHANGED_ARP_FILTER;

J
Johannes Berg 已提交
2202
	ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2203

J
Johannes Berg 已提交
2204
	mutex_lock(&local->iflist_mtx);
J
Johannes Berg 已提交
2205
	ieee80211_recalc_ps(local);
J
Johannes Berg 已提交
2206
	mutex_unlock(&local->iflist_mtx);
2207

2208
	ieee80211_recalc_smps(sdata);
E
Eliad Peller 已提交
2209 2210
	ieee80211_recalc_ps_vif(sdata);

2211
	netif_carrier_on(sdata->dev);
2212 2213
}

2214
static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2215 2216
				   u16 stype, u16 reason, bool tx,
				   u8 *frame_buf)
2217
{
2218
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2219
	struct ieee80211_local *local = sdata->local;
2220
	u32 changed = 0;
2221

2222
	sdata_assert_lock(sdata);
2223

2224 2225 2226
	if (WARN_ON_ONCE(tx && !frame_buf))
		return;

J
Johannes Berg 已提交
2227 2228 2229
	if (WARN_ON(!ifmgd->associated))
		return;

2230 2231
	ieee80211_stop_poll(sdata);

2232
	ifmgd->associated = NULL;
2233 2234
	netif_carrier_off(sdata->dev);

2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245
	/*
	 * 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
2246 2247 2248
	/* disable per-vif ps */
	ieee80211_recalc_ps_vif(sdata);

2249 2250 2251
	/* make sure ongoing transmission finishes */
	synchronize_net();

2252 2253 2254 2255 2256 2257
	/*
	 * 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.
	 */
2258
	if (tx)
2259
		ieee80211_flush_queues(local, sdata, true);
2260

2261
	/* deauthenticate/disassociate now */
2262 2263 2264 2265 2266 2267 2268 2269 2270
	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)
2271
			drv_mgd_prepare_tx(sdata->local, sdata, 0);
2272

2273 2274
		ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
					       reason, tx, frame_buf);
2275
	}
2276

2277
	/* flush out frame - make sure the deauth was actually sent */
2278
	if (tx)
2279
		ieee80211_flush_queues(local, sdata, false);
2280

2281
	/* clear bssid only after building the needed mgmt frames */
2282
	eth_zero_addr(ifmgd->bssid);
2283

2284
	/* remove AP and TDLS peers */
2285
	sta_info_flush(sdata);
2286 2287

	/* finally reset all BSS / config parameters */
2288 2289 2290
	changed |= ieee80211_reset_erp_info(sdata);

	ieee80211_led_assoc(local, 0);
J
Johannes Berg 已提交
2291 2292
	changed |= BSS_CHANGED_ASSOC;
	sdata->vif.bss_conf.assoc = false;
2293

J
Janusz Dziedzic 已提交
2294 2295 2296
	ifmgd->p2p_noa_index = -1;
	memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
	       sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2297

2298
	/* on the next assoc, re-program HT/VHT parameters */
B
Ben Greear 已提交
2299 2300
	memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
	memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2301 2302
	memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
	memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2303 2304 2305 2306 2307 2308 2309

	/* 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;
2310
	sdata->vif.mu_mimo_owner = false;
2311

2312
	sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2313

2314 2315 2316
	del_timer_sync(&local->dynamic_ps_timer);
	cancel_work_sync(&local->dynamic_ps_enable_work);

2317
	/* Disable ARP filtering */
2318
	if (sdata->vif.bss_conf.arp_addr_cnt)
2319 2320
		changed |= BSS_CHANGED_ARP_FILTER;

2321 2322 2323
	sdata->vif.bss_conf.qos = false;
	changed |= BSS_CHANGED_QOS;

2324 2325
	/* The BSSID (not really interesting) and HT changed */
	changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
J
Johannes Berg 已提交
2326
	ieee80211_bss_info_change_notify(sdata, changed);
2327

2328
	/* disassociated - set to defaults now */
2329
	ieee80211_set_wmm_default(sdata, false, false);
2330

2331 2332 2333 2334
	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);
2335

2336
	sdata->vif.bss_conf.dtim_period = 0;
2337 2338
	sdata->vif.bss_conf.beacon_rate = NULL;

2339
	ifmgd->have_beacon = false;
2340

2341
	ifmgd->flags = 0;
2342
	mutex_lock(&local->mtx);
2343
	ieee80211_vif_release_channel(sdata);
2344 2345

	sdata->vif.csa_active = false;
2346
	ifmgd->csa_waiting_bcn = false;
2347
	ifmgd->csa_ignored_same_chan = false;
2348 2349 2350 2351 2352
	if (sdata->csa_block_tx) {
		ieee80211_wake_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
		sdata->csa_block_tx = false;
	}
2353
	mutex_unlock(&local->mtx);
2354

2355 2356 2357 2358
	/* existing TX TSPEC sessions no longer exist */
	memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
	cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);

2359
	sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2360
}
2361

2362 2363 2364 2365 2366 2367 2368 2369
void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
			     struct ieee80211_hdr *hdr)
{
	/*
	 * We can postpone the mgd.timer whenever receiving unicast frames
	 * from AP because we know that the connection is working both ways
	 * at that time. But multicast frames (and hence also beacons) must
	 * be ignored here, because we need to trigger the timer during
J
Johannes Berg 已提交
2370 2371
	 * data idle periods for sending the periodic probe request to the
	 * AP we're connected to.
2372
	 */
J
Johannes Berg 已提交
2373 2374 2375
	if (is_multicast_ether_addr(hdr->addr1))
		return;

2376
	ieee80211_sta_reset_conn_monitor(sdata);
2377
}
2378

2379 2380 2381
static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2382
	struct ieee80211_local *local = sdata->local;
2383

2384
	mutex_lock(&local->mtx);
2385 2386
	if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
		goto out;
2387

2388
	__ieee80211_stop_poll(sdata);
2389 2390

	mutex_lock(&local->iflist_mtx);
J
Johannes Berg 已提交
2391
	ieee80211_recalc_ps(local);
2392
	mutex_unlock(&local->iflist_mtx);
2393

2394
	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2395
		goto out;
2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406

	/*
	 * 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));
2407 2408
out:
	mutex_unlock(&local->mtx);
2409 2410
}

2411 2412 2413 2414 2415
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
2416
	u16 tid = ieee80211_get_tid(hdr);
2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445
	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);
	}
}

2446
void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2447
			     struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2448
{
2449 2450
	ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);

F
Felix Fietkau 已提交
2451
	if (!ieee80211_is_data(hdr->frame_control))
2452 2453 2454 2455
	    return;

	if (ieee80211_is_nullfunc(hdr->frame_control) &&
	    sdata->u.mgd.probe_send_count > 0) {
2456
		if (ack)
2457
			ieee80211_sta_reset_conn_monitor(sdata);
2458 2459
		else
			sdata->u.mgd.nullfunc_failed = true;
2460
		ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2461
		return;
2462
	}
2463 2464 2465

	if (ack)
		ieee80211_sta_reset_conn_monitor(sdata);
2466 2467
}

2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481
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);
}

2482 2483 2484 2485
static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	const u8 *ssid;
2486
	u8 *dst = ifmgd->associated->bssid;
2487
	u8 unicast_limit = max(1, max_probe_tries - 3);
J
Johannes Berg 已提交
2488
	struct sta_info *sta;
2489 2490 2491 2492 2493 2494 2495 2496

	/*
	 * 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;
2497

2498 2499 2500 2501 2502 2503 2504
	/*
	 * 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.
	 */
2505 2506
	ifmgd->probe_send_count++;

J
Johannes Berg 已提交
2507 2508 2509 2510 2511 2512 2513 2514
	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);
	}

2515
	if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2516
		ifmgd->nullfunc_failed = false;
2517
		ieee80211_send_nullfunc(sdata->local, sdata, false);
2518
	} else {
2519 2520
		int ssid_len;

2521
		rcu_read_lock();
2522
		ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2523 2524 2525 2526 2527
		if (WARN_ON_ONCE(ssid == NULL))
			ssid_len = 0;
		else
			ssid_len = ssid[1];

2528 2529 2530
		ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
					      ssid + 2, ssid_len,
					      ifmgd->associated->channel);
2531
		rcu_read_unlock();
2532
	}
2533

2534
	ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2535
	run_again(sdata, ifmgd->probe_timeout);
2536 2537
}

J
Johannes Berg 已提交
2538 2539
static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
				   bool beacon)
2540 2541
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
2542
	bool already = false;
2543

2544
	if (!ieee80211_sdata_running(sdata))
2545 2546
		return;

2547
	sdata_lock(sdata);
2548 2549 2550 2551

	if (!ifmgd->associated)
		goto out;

2552 2553 2554 2555 2556 2557 2558
	mutex_lock(&sdata->local->mtx);

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

2559
	if (beacon) {
J
Johannes Berg 已提交
2560
		mlme_dbg_ratelimited(sdata,
2561 2562
				     "detected beacon loss from AP (missed %d beacons) - probing\n",
				     beacon_loss_count);
J
Johannes Berg 已提交
2563

2564
		ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2565
	}
2566

J
Johannes Berg 已提交
2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577
	/*
	 * 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!
	 */
2578
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
J
Johannes Berg 已提交
2579 2580
		already = true;

E
Eliad Peller 已提交
2581 2582
	ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;

2583 2584
	mutex_unlock(&sdata->local->mtx);

J
Johannes Berg 已提交
2585 2586 2587
	if (already)
		goto out;

2588
	mutex_lock(&sdata->local->iflist_mtx);
J
Johannes Berg 已提交
2589
	ieee80211_recalc_ps(sdata->local);
2590 2591
	mutex_unlock(&sdata->local->iflist_mtx);

2592 2593
	ifmgd->probe_send_count = 0;
	ieee80211_mgd_probe_ap_send(sdata);
2594
 out:
2595
	sdata_unlock(sdata);
2596 2597
}

2598 2599 2600 2601 2602
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;
2603
	struct cfg80211_bss *cbss;
2604 2605
	struct sk_buff *skb;
	const u8 *ssid;
2606
	int ssid_len;
2607 2608 2609 2610

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

2611
	sdata_assert_lock(sdata);
2612

2613 2614 2615 2616 2617 2618 2619
	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
2620 2621
		return NULL;

2622
	rcu_read_lock();
2623
	ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2624 2625 2626 2627 2628
	if (WARN_ON_ONCE(ssid == NULL))
		ssid_len = 0;
	else
		ssid_len = ssid[1];

2629
	skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
J
Johannes Berg 已提交
2630
					(u32) -1, cbss->channel,
2631
					ssid + 2, ssid_len,
2632
					NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2633
	rcu_read_unlock();
2634 2635 2636 2637 2638

	return skb;
}
EXPORT_SYMBOL(ieee80211_ap_probereq_get);

2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656
static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
					const u8 *buf, size_t len, bool tx,
					u16 reason)
{
	struct ieee80211_event event = {
		.type = MLME_EVENT,
		.u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
		.u.mlme.reason = reason,
	};

	if (tx)
		cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
	else
		cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);

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

2657
static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2658
{
2659
	struct ieee80211_local *local = sdata->local;
2660
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2661
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2662
	bool tx;
2663

2664
	sdata_lock(sdata);
2665
	if (!ifmgd->associated) {
2666
		sdata_unlock(sdata);
2667 2668 2669
		return;
	}

2670 2671
	tx = !sdata->csa_block_tx;

2672 2673 2674 2675 2676
	/* 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);

2677 2678
	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
			       WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2679
			       tx, frame_buf);
2680
	mutex_lock(&local->mtx);
2681
	sdata->vif.csa_active = false;
2682
	ifmgd->csa_waiting_bcn = false;
2683 2684 2685 2686 2687
	if (sdata->csa_block_tx) {
		ieee80211_wake_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
		sdata->csa_block_tx = false;
	}
2688
	mutex_unlock(&local->mtx);
2689

2690
	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2691 2692
				    WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);

2693
	sdata_unlock(sdata);
2694 2695
}

2696
static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
J
Johannes Berg 已提交
2697 2698 2699
{
	struct ieee80211_sub_if_data *sdata =
		container_of(work, struct ieee80211_sub_if_data,
2700
			     u.mgd.beacon_connection_loss_work);
2701 2702
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

2703 2704
	if (ifmgd->associated)
		ifmgd->beacon_loss_count++;
J
Johannes Berg 已提交
2705

2706
	if (ifmgd->connection_loss) {
2707 2708
		sdata_info(sdata, "Connection to AP %pM lost\n",
			   ifmgd->bssid);
2709
		__ieee80211_disconnect(sdata);
2710
	} else {
2711
		ieee80211_mgd_probe_ap(sdata, true);
2712 2713 2714 2715 2716 2717 2718 2719 2720
	}
}

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);

2721
	__ieee80211_disconnect(sdata);
J
Johannes Berg 已提交
2722 2723
}

2724 2725 2726
void ieee80211_beacon_loss(struct ieee80211_vif *vif)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2727
	struct ieee80211_hw *hw = &sdata->local->hw;
2728

J
Johannes Berg 已提交
2729 2730
	trace_api_beacon_loss(sdata);

2731
	sdata->u.mgd.connection_loss = false;
2732
	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2733 2734 2735
}
EXPORT_SYMBOL(ieee80211_beacon_loss);

2736 2737 2738 2739 2740
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
2741 2742
	trace_api_connection_loss(sdata);

2743
	sdata->u.mgd.connection_loss = true;
2744 2745 2746 2747 2748
	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
}
EXPORT_SYMBOL(ieee80211_connection_loss);


J
Johannes Berg 已提交
2749 2750 2751 2752 2753
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;

2754
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
2755 2756

	if (!assoc) {
2757 2758 2759 2760 2761 2762
		/*
		 * 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
2763 2764
		sta_info_destroy_addr(sdata, auth_data->bss->bssid);

2765
		eth_zero_addr(sdata->u.mgd.bssid);
J
Johannes Berg 已提交
2766
		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2767
		sdata->u.mgd.flags = 0;
2768
		mutex_lock(&sdata->local->mtx);
J
Johannes Berg 已提交
2769
		ieee80211_vif_release_channel(sdata);
2770
		mutex_unlock(&sdata->local->mtx);
J
Johannes Berg 已提交
2771 2772
	}

2773
	cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
J
Johannes Berg 已提交
2774 2775 2776 2777
	kfree(auth_data);
	sdata->u.mgd.auth_data = NULL;
}

2778
static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2779
					 bool assoc, bool abandon)
2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796
{
	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;
2797 2798
		sdata->vif.mu_mimo_owner = false;

2799 2800 2801
		mutex_lock(&sdata->local->mtx);
		ieee80211_vif_release_channel(sdata);
		mutex_unlock(&sdata->local->mtx);
2802 2803 2804

		if (abandon)
			cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2805 2806 2807 2808 2809 2810
	}

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

J
Johannes Berg 已提交
2811 2812 2813
static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
				     struct ieee80211_mgmt *mgmt, size_t len)
{
2814
	struct ieee80211_local *local = sdata->local;
J
Johannes Berg 已提交
2815 2816 2817
	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
	u8 *pos;
	struct ieee802_11_elems elems;
2818
	u32 tx_flags = 0;
J
Johannes Berg 已提交
2819 2820

	pos = mgmt->u.auth.variable;
2821 2822
	ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
			       mgmt->bssid, auth_data->bss->bssid);
J
Johannes Berg 已提交
2823 2824 2825
	if (!elems.challenge)
		return;
	auth_data->expected_transaction = 4;
2826
	drv_mgd_prepare_tx(sdata->local, sdata, 0);
2827
	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2828 2829
		tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
			   IEEE80211_TX_INTFL_MLME_CONN_TX;
2830
	ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
J
Johannes Berg 已提交
2831 2832 2833
			    elems.challenge - 2, elems.challenge_len + 2,
			    auth_data->bss->bssid, auth_data->bss->bssid,
			    auth_data->key, auth_data->key_len,
2834
			    auth_data->key_idx, tx_flags);
J
Johannes Berg 已提交
2835 2836
}

2837 2838 2839
static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
				    const u8 *bssid)
{
2840
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2841
	struct sta_info *sta;
2842
	bool result = true;
2843

2844 2845 2846 2847 2848 2849
	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);

2850 2851 2852 2853 2854
	/* 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);
2855 2856
		result = false;
		goto out;
2857 2858 2859
	}
	if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
		sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2860 2861
		result = false;
		goto out;
2862 2863
	}

2864 2865 2866
out:
	mutex_unlock(&sdata->local->sta_mtx);
	return result;
2867 2868
}

2869 2870
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
2871 2872 2873 2874
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	u8 bssid[ETH_ALEN];
	u16 auth_alg, auth_transaction, status_code;
2875 2876 2877 2878
	struct ieee80211_event event = {
		.type = MLME_EVENT,
		.u.mlme.data = AUTH_EVENT,
	};
J
Johannes Berg 已提交
2879

2880
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
2881 2882

	if (len < 24 + 6)
2883
		return;
J
Johannes Berg 已提交
2884 2885

	if (!ifmgd->auth_data || ifmgd->auth_data->done)
2886
		return;
J
Johannes Berg 已提交
2887 2888 2889

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

2890
	if (!ether_addr_equal(bssid, mgmt->bssid))
2891
		return;
J
Johannes Berg 已提交
2892 2893 2894 2895 2896 2897

	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 ||
2898 2899 2900 2901 2902
	    (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))) {
2903 2904 2905 2906
		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);
2907
		return;
2908
	}
J
Johannes Berg 已提交
2909 2910

	if (status_code != WLAN_STATUS_SUCCESS) {
J
Johannes Berg 已提交
2911 2912
		sdata_info(sdata, "%pM denied authentication (status %d)\n",
			   mgmt->sa, status_code);
2913
		ieee80211_destroy_auth_data(sdata, false);
2914
		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2915 2916 2917
		event.u.mlme.status = MLME_DENIED;
		event.u.mlme.reason = status_code;
		drv_event_callback(sdata->local, sdata, &event);
2918
		return;
J
Johannes Berg 已提交
2919 2920 2921 2922 2923 2924
	}

	switch (ifmgd->auth_data->algorithm) {
	case WLAN_AUTH_OPEN:
	case WLAN_AUTH_LEAP:
	case WLAN_AUTH_FT:
2925
	case WLAN_AUTH_SAE:
2926 2927 2928
	case WLAN_AUTH_FILS_SK:
	case WLAN_AUTH_FILS_SK_PFS:
	case WLAN_AUTH_FILS_PK:
J
Johannes Berg 已提交
2929 2930 2931 2932 2933
		break;
	case WLAN_AUTH_SHARED_KEY:
		if (ifmgd->auth_data->expected_transaction != 4) {
			ieee80211_auth_challenge(sdata, mgmt, len);
			/* need another frame */
2934
			return;
J
Johannes Berg 已提交
2935 2936 2937 2938 2939
		}
		break;
	default:
		WARN_ONCE(1, "invalid auth alg %d",
			  ifmgd->auth_data->algorithm);
2940
		return;
J
Johannes Berg 已提交
2941 2942
	}

2943 2944
	event.u.mlme.status = MLME_SUCCESS;
	drv_event_callback(sdata->local, sdata, &event);
2945 2946 2947 2948 2949 2950 2951 2952 2953
	if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
	    (auth_transaction == 2 &&
	     ifmgd->auth_data->expected_transaction == 2)) {
		if (!ieee80211_mark_sta_auth(sdata, bssid))
			goto out_err;
	} 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;
2954 2955
	}

2956
	cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2957
	return;
J
Johannes Berg 已提交
2958 2959 2960 2961 2962
 out_err:
	mutex_unlock(&sdata->local->sta_mtx);
	/* ignore frame -- wait for timeout */
}

2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018
#define case_WLAN(type) \
	case WLAN_REASON_##type: return #type

static const char *ieee80211_get_reason_code_string(u16 reason_code)
{
	switch (reason_code) {
	case_WLAN(UNSPECIFIED);
	case_WLAN(PREV_AUTH_NOT_VALID);
	case_WLAN(DEAUTH_LEAVING);
	case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
	case_WLAN(DISASSOC_AP_BUSY);
	case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
	case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
	case_WLAN(DISASSOC_STA_HAS_LEFT);
	case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
	case_WLAN(DISASSOC_BAD_POWER);
	case_WLAN(DISASSOC_BAD_SUPP_CHAN);
	case_WLAN(INVALID_IE);
	case_WLAN(MIC_FAILURE);
	case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
	case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
	case_WLAN(IE_DIFFERENT);
	case_WLAN(INVALID_GROUP_CIPHER);
	case_WLAN(INVALID_PAIRWISE_CIPHER);
	case_WLAN(INVALID_AKMP);
	case_WLAN(UNSUPP_RSN_VERSION);
	case_WLAN(INVALID_RSN_IE_CAP);
	case_WLAN(IEEE8021X_FAILED);
	case_WLAN(CIPHER_SUITE_REJECTED);
	case_WLAN(DISASSOC_UNSPECIFIED_QOS);
	case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
	case_WLAN(DISASSOC_LOW_ACK);
	case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
	case_WLAN(QSTA_LEAVE_QBSS);
	case_WLAN(QSTA_NOT_USE);
	case_WLAN(QSTA_REQUIRE_SETUP);
	case_WLAN(QSTA_TIMEOUT);
	case_WLAN(QSTA_CIPHER_NOT_SUPP);
	case_WLAN(MESH_PEER_CANCELED);
	case_WLAN(MESH_MAX_PEERS);
	case_WLAN(MESH_CONFIG);
	case_WLAN(MESH_CLOSE);
	case_WLAN(MESH_MAX_RETRIES);
	case_WLAN(MESH_CONFIRM_TIMEOUT);
	case_WLAN(MESH_INVALID_GTK);
	case_WLAN(MESH_INCONSISTENT_PARAM);
	case_WLAN(MESH_INVALID_SECURITY);
	case_WLAN(MESH_PATH_ERROR);
	case_WLAN(MESH_PATH_NOFORWARD);
	case_WLAN(MESH_PATH_DEST_UNREACHABLE);
	case_WLAN(MAC_EXISTS_IN_MBSS);
	case_WLAN(MESH_CHAN_REGULATORY);
	case_WLAN(MESH_CHAN);
	default: return "<unknown>";
	}
}
J
Johannes Berg 已提交
3019

3020 3021
static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
				     struct ieee80211_mgmt *mgmt, size_t len)
3022
{
3023
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3024
	u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3025

3026
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
3027

3028
	if (len < 24 + 2)
3029
		return;
3030

3031 3032 3033
	if (ifmgd->associated &&
	    ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
		const u8 *bssid = ifmgd->associated->bssid;
3034

3035 3036 3037
		sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
			   bssid, reason_code,
			   ieee80211_get_reason_code_string(reason_code));
3038

3039
		ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3040

3041 3042 3043 3044
		ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
					    reason_code);
		return;
	}
3045

3046 3047 3048
	if (ifmgd->assoc_data &&
	    ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
		const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3049

3050 3051 3052 3053 3054
		sdata_info(sdata,
			   "deauthenticated from %pM while associating (Reason: %u=%s)\n",
			   bssid, reason_code,
			   ieee80211_get_reason_code_string(reason_code));

3055
		ieee80211_destroy_assoc_data(sdata, false, true);
3056 3057 3058 3059

		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
		return;
	}
3060 3061 3062
}


3063 3064
static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
				       struct ieee80211_mgmt *mgmt, size_t len)
3065
{
3066
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3067 3068
	u16 reason_code;

3069
	sdata_assert_lock(sdata);
3070

J
Johannes Berg 已提交
3071
	if (len < 24 + 2)
3072
		return;
3073

J
Johannes Berg 已提交
3074
	if (!ifmgd->associated ||
3075
	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3076
		return;
3077 3078 3079

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

3080 3081 3082
	sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
		   mgmt->sa, reason_code,
		   ieee80211_get_reason_code_string(reason_code));
3083

3084 3085
	ieee80211_set_disassoc(sdata, 0, 0, false, NULL);

3086
	ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3087 3088
}

3089 3090 3091 3092
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,
3093
				int *min_rate, int *min_rate_index,
3094
				int shift)
3095 3096 3097 3098
{
	int i, j;

	for (i = 0; i < supp_rates_len; i++) {
3099
		int rate = supp_rates[i] & 0x7f;
3100 3101
		bool is_basic = !!(supp_rates[i] & 0x80);

3102
		if ((rate * 5 * (1 << shift)) > 110)
3103 3104 3105
			*have_higher_than_11mbit = true;

		/*
3106 3107
		 * Skip HT and VHT BSS membership selectors since they're not
		 * rates.
3108
		 *
3109
		 * Note: Even though the membership selector and the basic
3110 3111 3112
		 *	 rate flag share the same bit, they are not exactly
		 *	 the same.
		 */
3113 3114
		if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
		    supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3115 3116 3117
			continue;

		for (j = 0; j < sband->n_bitrates; j++) {
3118 3119 3120 3121 3122 3123 3124
			struct ieee80211_rate *br;
			int brate;

			br = &sband->bitrates[j];

			brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
			if (brate == rate) {
3125 3126 3127
				*rates |= BIT(j);
				if (is_basic)
					*basic_rates |= BIT(j);
3128 3129
				if ((rate * 5) < *min_rate) {
					*min_rate = rate * 5;
3130 3131 3132 3133 3134 3135 3136
					*min_rate_index = j;
				}
				break;
			}
		}
	}
}
3137

3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150
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;
}

J
Johannes Berg 已提交
3151 3152
static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
				    struct cfg80211_bss *cbss,
J
Johannes Berg 已提交
3153
				    struct ieee80211_mgmt *mgmt, size_t len)
3154
{
3155
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3156
	struct ieee80211_local *local = sdata->local;
3157
	struct ieee80211_supported_band *sband;
3158
	struct sta_info *sta;
J
Johannes Berg 已提交
3159 3160
	u8 *pos;
	u16 capab_info, aid;
3161
	struct ieee802_11_elems elems;
J
Johannes Berg 已提交
3162
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3163 3164
	const struct cfg80211_bss_ies *bss_ies = NULL;
	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
J
Johannes Berg 已提交
3165
	u32 changed = 0;
3166
	int err;
3167
	bool ret;
3168

J
Johannes Berg 已提交
3169
	/* AssocResp and ReassocResp have identical structure */
3170 3171

	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
J
Johannes Berg 已提交
3172
	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3173

3174 3175 3176 3177 3178
	/*
	 * The 5 MSB of the AID field are reserved
	 * (802.11-2016 9.4.1.8 AID field)
	 */
	aid &= 0x7ff;
3179

3180 3181 3182
	ifmgd->broken_ap = false;

	if (aid == 0 || aid > IEEE80211_MAX_AID) {
J
Johannes Berg 已提交
3183 3184
		sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
			   aid);
3185 3186 3187 3188
		aid = 0;
		ifmgd->broken_ap = true;
	}

J
Johannes Berg 已提交
3189
	pos = mgmt->u.assoc_resp.variable;
3190 3191
	ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
			       mgmt->bssid, assoc_data->bss->bssid);
J
Johannes Berg 已提交
3192

3193
	if (!elems.supp_rates) {
J
Johannes Berg 已提交
3194
		sdata_info(sdata, "no SuppRates element in AssocResp\n");
J
Johannes Berg 已提交
3195
		return false;
3196 3197
	}

3198
	ifmgd->aid = aid;
3199 3200 3201
	ifmgd->tdls_chan_switch_prohibited =
		elems.ext_capab && elems.ext_capab_len >= 5 &&
		(elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3202

3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227
	/*
	 * Some APs are erroneously not including some information in their
	 * (re)association response frames. Try to recover by using the data
	 * from the beacon or probe response. This seems to afflict mobile
	 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
	 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
	 */
	if ((assoc_data->wmm && !elems.wmm_param) ||
	    (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
	     (!elems.ht_cap_elem || !elems.ht_operation)) ||
	    (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
	     (!elems.vht_cap_elem || !elems.vht_operation))) {
		const struct cfg80211_bss_ies *ies;
		struct ieee802_11_elems bss_elems;

		rcu_read_lock();
		ies = rcu_dereference(cbss->ies);
		if (ies)
			bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
					  GFP_ATOMIC);
		rcu_read_unlock();
		if (!bss_ies)
			return false;

		ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3228 3229 3230
				       false, &bss_elems,
				       mgmt->bssid,
				       assoc_data->bss->bssid);
3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267
		if (assoc_data->wmm &&
		    !elems.wmm_param && bss_elems.wmm_param) {
			elems.wmm_param = bss_elems.wmm_param;
			sdata_info(sdata,
				   "AP bug: WMM param missing from AssocResp\n");
		}

		/*
		 * Also check if we requested HT/VHT, otherwise the AP doesn't
		 * have to include the IEs in the (re)association response.
		 */
		if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
			elems.ht_cap_elem = bss_elems.ht_cap_elem;
			sdata_info(sdata,
				   "AP bug: HT capability missing from AssocResp\n");
		}
		if (!elems.ht_operation && bss_elems.ht_operation &&
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
			elems.ht_operation = bss_elems.ht_operation;
			sdata_info(sdata,
				   "AP bug: HT operation missing from AssocResp\n");
		}
		if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
			elems.vht_cap_elem = bss_elems.vht_cap_elem;
			sdata_info(sdata,
				   "AP bug: VHT capa missing from AssocResp\n");
		}
		if (!elems.vht_operation && bss_elems.vht_operation &&
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
			elems.vht_operation = bss_elems.vht_operation;
			sdata_info(sdata,
				   "AP bug: VHT operation missing from AssocResp\n");
		}
	}

3268 3269 3270 3271 3272 3273 3274
	/*
	 * We previously checked these in the beacon/probe response, so
	 * they should be present here. This is just a safety net.
	 */
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
	    (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
		sdata_info(sdata,
3275 3276 3277
			   "HT AP is missing WMM params or HT capability/operation\n");
		ret = false;
		goto out;
3278 3279 3280 3281 3282
	}

	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
	    (!elems.vht_cap_elem || !elems.vht_operation)) {
		sdata_info(sdata,
3283 3284 3285
			   "VHT AP is missing VHT capability/operation\n");
		ret = false;
		goto out;
3286 3287
	}

3288 3289 3290 3291 3292
	mutex_lock(&sdata->local->sta_mtx);
	/*
	 * station info was already allocated and inserted before
	 * the association and should be available to us
	 */
3293
	sta = sta_info_get(sdata, cbss->bssid);
3294 3295
	if (WARN_ON(!sta)) {
		mutex_unlock(&sdata->local->sta_mtx);
3296 3297
		ret = false;
		goto out;
3298
	}
3299

3300 3301 3302 3303 3304 3305
	sband = ieee80211_get_sband(sdata);
	if (!sband) {
		mutex_unlock(&sdata->local->sta_mtx);
		ret = false;
		goto out;
	}
3306

L
Luca Coelho 已提交
3307 3308 3309 3310 3311 3312 3313 3314 3315
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
	    (!elems.he_cap || !elems.he_operation)) {
		mutex_unlock(&sdata->local->sta_mtx);
		sdata_info(sdata,
			   "HE AP is missing HE capability/operation\n");
		ret = false;
		goto out;
	}

3316
	/* Set up internal HT/VHT capabilities */
3317
	if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
B
Ben Greear 已提交
3318
		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3319
						  elems.ht_cap_elem, sta);
3320

M
Mahesh Palivela 已提交
3321 3322
	if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
		ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3323
						    elems.vht_cap_elem, sta);
M
Mahesh Palivela 已提交
3324

L
Luca Coelho 已提交
3325 3326 3327 3328 3329 3330 3331 3332
	if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
	    elems.he_cap) {
		ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
						  elems.he_cap,
						  elems.he_cap_len,
						  sta);

		bss_conf->he_support = sta->sta.he_cap.has_he;
3333 3334
		bss_conf->twt_requester =
			ieee80211_twt_req_supported(sta, &elems);
L
Luca Coelho 已提交
3335 3336
	} else {
		bss_conf->he_support = false;
3337
		bss_conf->twt_requester = false;
L
Luca Coelho 已提交
3338 3339 3340
	}

	if (bss_conf->he_support) {
3341 3342 3343
		bss_conf->bss_color =
			le32_get_bits(elems.he_operation->he_oper_params,
				      IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
L
Luca Coelho 已提交
3344 3345

		bss_conf->htc_trig_based_pkt_ext =
3346 3347
			le32_get_bits(elems.he_operation->he_oper_params,
			      IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
L
Luca Coelho 已提交
3348
		bss_conf->frame_time_rts_th =
3349 3350
			le32_get_bits(elems.he_operation->he_oper_params,
			      IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
L
Luca Coelho 已提交
3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366

		bss_conf->multi_sta_back_32bit =
			sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
			IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;

		bss_conf->ack_enabled =
			sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
			IEEE80211_HE_MAC_CAP2_ACK_EN;

		bss_conf->uora_exists = !!elems.uora_element;
		if (elems.uora_element)
			bss_conf->uora_ocw_range = elems.uora_element[0];

		/* TODO: OPEN: what happens if BSS color disable is set? */
	}

S
Sara Sharon 已提交
3367 3368 3369 3370 3371 3372 3373 3374
	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;
	}

3375 3376 3377 3378 3379 3380
	/*
	 * 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.
	 */
3381

3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396
	/*
	 * If an operating mode notification IE is present, override the
	 * NSS calculation (that would be done in rate_control_rate_init())
	 * and use the # of streams from that element.
	 */
	if (elems.opmode_notif &&
	    !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
		u8 nss;

		nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
		nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
		nss += 1;
		sta->sta.rx_nss = nss;
	}

3397
	rate_control_rate_init(sta);
3398

3399
	if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
J
Johannes Berg 已提交
3400
		set_sta_flag(sta, WLAN_STA_MFP);
3401 3402 3403 3404
		sta->sta.mfp = true;
	} else {
		sta->sta.mfp = false;
	}
3405

3406
	sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3407

3408
	err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3409 3410 3411
	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
3412 3413 3414
		sdata_info(sdata,
			   "failed to move station %pM to desired state\n",
			   sta->sta.addr);
3415 3416
		WARN_ON(__sta_info_destroy(sta));
		mutex_unlock(&sdata->local->sta_mtx);
3417 3418
		ret = false;
		goto out;
3419 3420
	}

3421
	mutex_unlock(&sdata->local->sta_mtx);
3422

3423 3424 3425 3426 3427 3428 3429
	/*
	 * 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;
3430
	ifmgd->mu_edca_last_param_set = -1;
3431

3432
	if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3433
		ieee80211_set_wmm_default(sdata, false, false);
3434
	} else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
L
Luca Coelho 已提交
3435 3436
					     elems.wmm_param_len,
					     elems.mu_edca_param_set)) {
3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447
		/* 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;
	}
3448
	changed |= BSS_CHANGED_QOS;
3449

3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461
	if (elems.max_idle_period_ie) {
		bss_conf->max_idle_period =
			le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
		bss_conf->protected_keep_alive =
			!!(elems.max_idle_period_ie->idle_options &
			   WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
		changed |= BSS_CHANGED_KEEP_ALIVE;
	} else {
		bss_conf->max_idle_period = 0;
		bss_conf->protected_keep_alive = false;
	}

J
Johannes Berg 已提交
3462 3463 3464 3465
	/* set AID and assoc capability,
	 * ieee80211_set_associated() will tell the driver */
	bss_conf->aid = aid;
	bss_conf->assoc_capability = capab_info;
3466
	ieee80211_set_associated(sdata, cbss, changed);
3467

3468 3469 3470 3471 3472 3473 3474
	/*
	 * 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);

3475
	/*
J
Johannes Berg 已提交
3476 3477
	 * Start timer to probe the connection to the AP now.
	 * Also start the timer that will detect beacon loss.
3478
	 */
J
Johannes Berg 已提交
3479
	ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3480
	ieee80211_sta_reset_beacon_monitor(sdata);
3481

3482 3483 3484 3485
	ret = true;
 out:
	kfree(bss_ies);
	return ret;
3486 3487
}

3488 3489 3490
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
3491 3492 3493 3494 3495
{
	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;
3496
	int ac, uapsd_queues = -1;
J
Johannes Berg 已提交
3497 3498
	u8 *pos;
	bool reassoc;
3499
	struct cfg80211_bss *bss;
3500 3501 3502 3503
	struct ieee80211_event event = {
		.type = MLME_EVENT,
		.u.mlme.data = ASSOC_EVENT,
	};
J
Johannes Berg 已提交
3504

3505
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
3506 3507

	if (!assoc_data)
3508
		return;
3509
	if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3510
		return;
J
Johannes Berg 已提交
3511 3512 3513 3514 3515 3516 3517

	/*
	 * AssocResp and ReassocResp have identical structure, so process both
	 * of them in this function.
	 */

	if (len < 24 + 6)
3518
		return;
J
Johannes Berg 已提交
3519

3520
	reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
J
Johannes Berg 已提交
3521 3522 3523 3524
	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
	status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);

J
Johannes Berg 已提交
3525 3526 3527 3528
	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
3529

3530 3531 3532 3533
	if (assoc_data->fils_kek_len &&
	    fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
		return;

J
Johannes Berg 已提交
3534
	pos = mgmt->u.assoc_resp.variable;
3535 3536
	ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
			       mgmt->bssid, assoc_data->bss->bssid);
J
Johannes Berg 已提交
3537 3538

	if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3539 3540
	    elems.timeout_int &&
	    elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
J
Johannes Berg 已提交
3541
		u32 tu, ms;
3542
		tu = le32_to_cpu(elems.timeout_int->value);
J
Johannes Berg 已提交
3543
		ms = tu * 1024 / 1000;
J
Johannes Berg 已提交
3544 3545 3546
		sdata_info(sdata,
			   "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
			   mgmt->sa, tu, ms);
J
Johannes Berg 已提交
3547
		assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3548
		assoc_data->timeout_started = true;
J
Johannes Berg 已提交
3549
		if (ms > IEEE80211_ASSOC_TIMEOUT)
3550 3551
			run_again(sdata, assoc_data->timeout);
		return;
J
Johannes Berg 已提交
3552 3553
	}

3554
	bss = assoc_data->bss;
J
Johannes Berg 已提交
3555 3556

	if (status_code != WLAN_STATUS_SUCCESS) {
J
Johannes Berg 已提交
3557 3558
		sdata_info(sdata, "%pM denied association (code=%d)\n",
			   mgmt->sa, status_code);
3559
		ieee80211_destroy_assoc_data(sdata, false, false);
3560 3561 3562
		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
3563
	} else {
3564
		if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
J
Johannes Berg 已提交
3565
			/* oops -- internal error -- send timeout for now */
3566
			ieee80211_destroy_assoc_data(sdata, false, false);
3567
			cfg80211_assoc_timeout(sdata->dev, bss);
3568
			return;
J
Johannes Berg 已提交
3569
		}
3570 3571
		event.u.mlme.status = MLME_SUCCESS;
		drv_event_callback(sdata->local, sdata, &event);
3572
		sdata_info(sdata, "associated\n");
3573 3574 3575 3576 3577 3578

		/*
		 * 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
		 */
3579
		ieee80211_destroy_assoc_data(sdata, true, false);
3580 3581 3582 3583 3584

		/* get uapsd queues configuration */
		uapsd_queues = 0;
		for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
			if (sdata->tx_conf[ac].uapsd)
3585
				uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
J
Johannes Berg 已提交
3586 3587
	}

3588 3589
	cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues,
			       ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
J
Johannes Berg 已提交
3590
}
J
Johannes Berg 已提交
3591

3592
static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
J
Johannes Berg 已提交
3593
				  struct ieee80211_mgmt *mgmt, size_t len,
3594
				  struct ieee80211_rx_status *rx_status)
3595 3596
{
	struct ieee80211_local *local = sdata->local;
3597
	struct ieee80211_bss *bss;
3598
	struct ieee80211_channel *channel;
3599

3600
	sdata_assert_lock(sdata);
3601

3602 3603
	channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
	if (!channel)
3604 3605
		return;

3606
	bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3607 3608
	if (bss) {
		sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3609
		ieee80211_rx_bss_put(local, bss);
3610
	}
3611 3612 3613
}


3614
static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
J
Johannes Berg 已提交
3615
					 struct sk_buff *skb)
3616
{
J
Johannes Berg 已提交
3617
	struct ieee80211_mgmt *mgmt = (void *)skb->data;
3618
	struct ieee80211_if_managed *ifmgd;
J
Johannes Berg 已提交
3619 3620
	struct ieee80211_rx_status *rx_status = (void *) skb->cb;
	size_t baselen, len = skb->len;
3621

3622 3623
	ifmgd = &sdata->u.mgd;

3624
	sdata_assert_lock(sdata);
3625

3626
	if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3627 3628
		return; /* ignore ProbeResp to foreign address */

3629 3630 3631 3632
	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
	if (baselen > len)
		return;

3633
	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3634

3635
	if (ifmgd->associated &&
3636
	    ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3637
		ieee80211_reset_ap_probe(sdata);
3638 3639
}

3640 3641 3642
/*
 * This is the canonical list of information elements we care about,
 * the filter code also gives us all changes to the Microsoft OUI
3643 3644 3645
 * (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.
3646 3647 3648 3649 3650 3651 3652 3653 3654 3655
 *
 * 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 =
3656 3657 3658 3659 3660
	(1ULL << WLAN_EID_COUNTRY) |
	(1ULL << WLAN_EID_ERP_INFO) |
	(1ULL << WLAN_EID_CHANNEL_SWITCH) |
	(1ULL << WLAN_EID_PWR_CONSTRAINT) |
	(1ULL << WLAN_EID_HT_CAPABILITY) |
3661 3662
	(1ULL << WLAN_EID_HT_OPERATION) |
	(1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3663

3664 3665 3666 3667 3668
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)
3669
{
3670
	/* Track average RSSI from the Beacon frames of the current AP */
3671

3672 3673
	if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
		ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3674
		ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3675
		ifmgd->last_cqm_event_signal = 0;
3676
		ifmgd->count_beacon_signal = 1;
3677
		ifmgd->last_ave_beacon_signal = 0;
3678
	} else {
3679
		ifmgd->count_beacon_signal++;
3680
	}
3681

3682 3683
	ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);

3684 3685
	if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3686
		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3687
		int last_sig = ifmgd->last_ave_beacon_signal;
3688 3689 3690
		struct ieee80211_event event = {
			.type = RSSI_EVENT,
		};
3691 3692 3693 3694 3695 3696 3697 3698

		/*
		 * 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;
3699 3700
			event.u.rssi.data = RSSI_EVENT_HIGH;
			drv_event_callback(local, sdata, &event);
3701 3702 3703 3704
		} else if (sig < ifmgd->rssi_min_thold &&
			   (last_sig >= ifmgd->rssi_max_thold ||
			   last_sig == 0)) {
			ifmgd->last_ave_beacon_signal = sig;
3705 3706
			event.u.rssi.data = RSSI_EVENT_LOW;
			drv_event_callback(local, sdata, &event);
3707 3708 3709
		}
	}

3710
	if (bss_conf->cqm_rssi_thold &&
3711
	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3712
	    !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3713
		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3714 3715 3716
		int last_event = ifmgd->last_cqm_event_signal;
		int thold = bss_conf->cqm_rssi_thold;
		int hyst = bss_conf->cqm_rssi_hyst;
3717

3718 3719 3720 3721 3722 3723
		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,
3724
				sig, GFP_KERNEL);
3725 3726 3727 3728 3729 3730
		} 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,
3731
				sig, GFP_KERNEL);
3732 3733 3734
		}
	}

3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757
	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);
		}
	}
3758 3759
}

S
Sara Sharon 已提交
3760 3761 3762 3763 3764 3765 3766 3767 3768 3769
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);
}

3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810
static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
				     struct ieee80211_mgmt *mgmt, size_t len,
				     struct ieee80211_rx_status *rx_status)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
	size_t baselen;
	struct ieee802_11_elems elems;
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_chanctx_conf *chanctx_conf;
	struct ieee80211_channel *chan;
	struct sta_info *sta;
	u32 changed = 0;
	bool erp_valid;
	u8 erp_value = 0;
	u32 ncrc;
	u8 *bssid;
	u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];

	sdata_assert_lock(sdata);

	/* Process beacon from the current BSS */
	baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
	if (baselen > len)
		return;

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

	if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
		rcu_read_unlock();
		return;
	}
	chan = chanctx_conf->def.chan;
	rcu_read_unlock();

	if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
S
Sara Sharon 已提交
3811
	    ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
3812
		ieee802_11_parse_elems(mgmt->u.beacon.variable,
3813 3814 3815
				       len - baselen, false, &elems,
				       mgmt->bssid,
				       ifmgd->assoc_data->bss->bssid);
3816

3817
		ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
S
Sara Sharon 已提交
3818 3819 3820

		if (elems.dtim_period)
			ifmgd->dtim_period = elems.dtim_period;
3821 3822 3823 3824 3825 3826 3827
		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
3828
			sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3829
		}
S
Sara Sharon 已提交
3830 3831 3832 3833 3834 3835 3836 3837 3838

		if (elems.mbssid_config_ie)
			bss_conf->profile_periodicity =
				elems.mbssid_config_ie->profile_periodicity;

		if (elems.ext_capab_len >= 11 &&
		    (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
			bss_conf->ema_ap = true;

3839 3840 3841 3842 3843 3844 3845 3846
		/* 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 ||
S
Sara Sharon 已提交
3847
	    !ieee80211_rx_our_beacon(mgmt->bssid,  ifmgd->associated))
3848 3849 3850 3851 3852 3853
		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);
3854

3855
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
J
Johannes Berg 已提交
3856
		mlme_dbg_ratelimited(sdata,
3857
				     "cancelling AP probe due to a received beacon\n");
3858
		ieee80211_reset_ap_probe(sdata);
3859 3860
	}

J
Johannes Berg 已提交
3861 3862 3863 3864
	/*
	 * Push the beacon loss detection into the future since
	 * we are processing a beacon from the AP just now.
	 */
3865
	ieee80211_sta_reset_beacon_monitor(sdata);
J
Johannes Berg 已提交
3866

3867 3868
	ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
	ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3869
					  len - baselen, false, &elems,
3870 3871
					  care_about_ies, ncrc,
					  mgmt->bssid, bssid);
3872

3873 3874 3875 3876 3877 3878 3879
	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
	    ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
		if (local->hw.conf.dynamic_ps_timeout > 0) {
			if (local->hw.conf.flags & IEEE80211_CONF_PS) {
				local->hw.conf.flags &= ~IEEE80211_CONF_PS;
				ieee80211_hw_config(local,
						    IEEE80211_CONF_CHANGE_PS);
3880
			}
3881
			ieee80211_send_nullfunc(local, sdata, false);
3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893
		} 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);
3894 3895
		}
	}
J
Johannes Berg 已提交
3896

3897 3898
	if (sdata->vif.p2p ||
	    sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
J
Janusz Dziedzic 已提交
3899
		struct ieee80211_p2p_noa_attr noa = {};
3900 3901 3902 3903 3904
		int ret;

		ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
					    len - baselen,
					    IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3905
					    (u8 *) &noa, sizeof(noa));
J
Janusz Dziedzic 已提交
3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921
		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));
3922 3923 3924 3925 3926
			changed |= BSS_CHANGED_P2P_PS;
			ifmgd->beacon_crc_valid = false;
		}
	}

3927 3928 3929
	if (ifmgd->csa_waiting_bcn)
		ieee80211_chswitch_post_beacon(sdata);

3930 3931 3932 3933 3934 3935 3936 3937
	/*
	 * 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.
	 */
3938
	if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3939 3940 3941 3942
		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
3943
		sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3944 3945
	}

3946
	if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3947
		return;
3948
	ifmgd->beacon_crc = ncrc;
3949
	ifmgd->beacon_crc_valid = true;
3950

3951
	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3952

3953
	ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3954
					 rx_status->device_timestamp,
3955 3956
					 &elems, true);

3957 3958
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
	    ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
L
Luca Coelho 已提交
3959 3960
				     elems.wmm_param_len,
				     elems.mu_edca_param_set))
3961 3962
		changed |= BSS_CHANGED_QOS;

3963 3964
	/*
	 * If we haven't had a beacon before, tell the driver about the
3965
	 * DTIM period (and beacon timing if desired) now.
3966
	 */
3967
	if (!ifmgd->have_beacon) {
3968
		/* a few bogus AP send dtim_period = 0 or no TIM IE */
S
Sara Sharon 已提交
3969
		bss_conf->dtim_period = elems.dtim_period ?: 1;
3970

3971 3972
		changed |= BSS_CHANGED_BEACON_INFO;
		ifmgd->have_beacon = true;
3973 3974

		mutex_lock(&local->iflist_mtx);
J
Johannes Berg 已提交
3975
		ieee80211_recalc_ps(local);
3976 3977
		mutex_unlock(&local->iflist_mtx);

3978
		ieee80211_recalc_ps_vif(sdata);
3979 3980
	}

3981
	if (elems.erp_info) {
J
Johannes Berg 已提交
3982 3983 3984 3985
		erp_valid = true;
		erp_value = elems.erp_info[0];
	} else {
		erp_valid = false;
3986
	}
J
Johannes Berg 已提交
3987 3988 3989
	changed |= ieee80211_handle_bss_capability(sdata,
			le16_to_cpu(mgmt->u.beacon.capab_info),
			erp_valid, erp_value);
3990

3991
	mutex_lock(&local->sta_mtx);
3992 3993
	sta = sta_info_get(sdata, bssid);

3994 3995
	if (ieee80211_config_bw(sdata, sta,
				elems.ht_cap_elem, elems.ht_operation,
L
Luca Coelho 已提交
3996 3997
				elems.vht_operation, elems.he_operation,
				bssid, &changed)) {
3998
		mutex_unlock(&local->sta_mtx);
3999 4000 4001
		sdata_info(sdata,
			   "failed to follow AP %pM bandwidth change, disconnect\n",
			   bssid);
4002 4003 4004
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       WLAN_REASON_DEAUTH_LEAVING,
				       true, deauth_buf);
4005 4006 4007
		ieee80211_report_disconnect(sdata, deauth_buf,
					    sizeof(deauth_buf), true,
					    WLAN_REASON_DEAUTH_LEAVING);
4008
		return;
4009
	}
4010 4011 4012

	if (sta && elems.opmode_notif)
		ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4013
					    rx_status->band);
4014
	mutex_unlock(&local->sta_mtx);
4015

4016 4017 4018
	changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
					       elems.country_elem,
					       elems.country_elem_len,
4019 4020
					       elems.pwr_constr_elem,
					       elems.cisco_dtpc_elem);
4021

4022
	ieee80211_bss_info_change_notify(sdata, changed);
4023 4024
}

4025 4026
void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
				  struct sk_buff *skb)
4027 4028 4029 4030
{
	struct ieee80211_rx_status *rx_status;
	struct ieee80211_mgmt *mgmt;
	u16 fc;
4031 4032
	struct ieee802_11_elems elems;
	int ies_len;
4033 4034 4035 4036 4037

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

4038
	sdata_lock(sdata);
4039

J
Johannes Berg 已提交
4040 4041
	switch (fc & IEEE80211_FCTL_STYPE) {
	case IEEE80211_STYPE_BEACON:
4042
		ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
J
Johannes Berg 已提交
4043 4044 4045 4046 4047
		break;
	case IEEE80211_STYPE_PROBE_RESP:
		ieee80211_rx_mgmt_probe_resp(sdata, skb);
		break;
	case IEEE80211_STYPE_AUTH:
4048
		ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
4049 4050
		break;
	case IEEE80211_STYPE_DEAUTH:
4051
		ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
4052 4053
		break;
	case IEEE80211_STYPE_DISASSOC:
4054
		ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
4055 4056 4057
		break;
	case IEEE80211_STYPE_ASSOC_RESP:
	case IEEE80211_STYPE_REASSOC_RESP:
4058
		ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
4059 4060
		break;
	case IEEE80211_STYPE_ACTION:
4061
		if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4062 4063 4064
			ies_len = skb->len -
				  offsetof(struct ieee80211_mgmt,
					   u.action.u.chan_switch.variable);
4065 4066 4067 4068

			if (ies_len < 0)
				break;

4069
			/* CSA IE cannot be overridden, no need for BSSID */
4070 4071
			ieee802_11_parse_elems(
				mgmt->u.action.u.chan_switch.variable,
4072
				ies_len, true, &elems, mgmt->bssid, NULL);
4073 4074 4075 4076

			if (elems.parse_error)
				break;

4077
			ieee80211_sta_process_chanswitch(sdata,
4078 4079 4080
						 rx_status->mactime,
						 rx_status->device_timestamp,
						 &elems, false);
4081 4082 4083 4084 4085 4086 4087 4088
		} 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;

4089 4090 4091 4092
			/*
			 * extended CSA IE can't be overridden, no need for
			 * BSSID
			 */
4093 4094
			ieee802_11_parse_elems(
				mgmt->u.action.u.ext_chan_switch.variable,
4095
				ies_len, true, &elems, mgmt->bssid, NULL);
4096 4097 4098 4099 4100 4101 4102 4103

			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
4104
			ieee80211_sta_process_chanswitch(sdata,
4105 4106 4107
						 rx_status->mactime,
						 rx_status->device_timestamp,
						 &elems, false);
4108
		}
4109
		break;
4110
	}
4111
	sdata_unlock(sdata);
4112 4113
}

4114
static void ieee80211_sta_timer(struct timer_list *t)
4115
{
J
Johannes Berg 已提交
4116
	struct ieee80211_sub_if_data *sdata =
4117
		from_timer(sdata, t, u.mgd.timer);
4118

4119
	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4120 4121
}

4122
static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4123
					  u8 *bssid, u8 reason, bool tx)
4124
{
4125
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4126

4127
	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4128
			       tx, frame_buf);
4129

4130 4131
	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
				    reason);
4132 4133
}

4134
static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
J
Johannes Berg 已提交
4135 4136 4137 4138
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4139
	u32 tx_flags = 0;
4140 4141
	u16 trans = 1;
	u16 status = 0;
4142
	u16 prepare_tx_duration = 0;
J
Johannes Berg 已提交
4143

4144
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
4145 4146 4147 4148 4149 4150 4151

	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
4152 4153
		sdata_info(sdata, "authentication with %pM timed out\n",
			   auth_data->bss->bssid);
J
Johannes Berg 已提交
4154 4155 4156 4157 4158 4159 4160 4161 4162 4163

		/*
		 * 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;
	}

4164 4165 4166 4167 4168
	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
4169

4170 4171 4172
	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
4173

4174
	auth_data->expected_transaction = 2;
4175

4176 4177 4178 4179 4180
	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
4181

4182 4183 4184
	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
4185

4186 4187 4188 4189 4190
	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
4191

4192
	if (tx_flags == 0) {
4193 4194 4195 4196 4197
		if (auth_data->algorithm == WLAN_AUTH_SAE)
			auth_data->timeout = jiffies +
				IEEE80211_AUTH_TIMEOUT_SAE;
		else
			auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4198
	} else {
4199 4200
		auth_data->timeout =
			round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4201
	}
J
Johannes Berg 已提交
4202

4203 4204 4205
	auth_data->timeout_started = true;
	run_again(sdata, auth_data->timeout);

J
Johannes Berg 已提交
4206 4207 4208 4209 4210 4211 4212 4213
	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;

4214
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
4215 4216 4217

	assoc_data->tries++;
	if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
J
Johannes Berg 已提交
4218 4219
		sdata_info(sdata, "association with %pM timed out\n",
			   assoc_data->bss->bssid);
J
Johannes Berg 已提交
4220 4221 4222 4223 4224 4225 4226 4227 4228 4229

		/*
		 * 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
4230 4231 4232
	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
4233 4234
	ieee80211_send_assoc(sdata);

4235
	if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4236
		assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4237
		assoc_data->timeout_started = true;
4238
		run_again(sdata, assoc_data->timeout);
4239
	} else {
4240 4241 4242 4243 4244
		assoc_data->timeout =
			round_jiffies_up(jiffies +
					 IEEE80211_ASSOC_TIMEOUT_LONG);
		assoc_data->timeout_started = true;
		run_again(sdata, assoc_data->timeout);
4245
	}
J
Johannes Berg 已提交
4246 4247 4248 4249

	return 0;
}

4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261
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);
}

4262
void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
J
Johannes Berg 已提交
4263 4264
{
	struct ieee80211_local *local = sdata->local;
4265
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
4266

4267
	sdata_lock(sdata);
4268

4269 4270 4271 4272 4273
	if (ifmgd->status_received) {
		__le16 fc = ifmgd->status_fc;
		bool status_acked = ifmgd->status_acked;

		ifmgd->status_received = false;
4274
		if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4275
			if (status_acked) {
4276 4277 4278 4279 4280 4281 4282 4283 4284
				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;
4285
				run_again(sdata, ifmgd->auth_data->timeout);
4286 4287 4288
			} else {
				ifmgd->auth_data->timeout = jiffies - 1;
			}
4289
			ifmgd->auth_data->timeout_started = true;
4290 4291 4292 4293 4294 4295
		} 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;
4296
				run_again(sdata, ifmgd->assoc_data->timeout);
4297 4298 4299
			} else {
				ifmgd->assoc_data->timeout = jiffies - 1;
			}
4300
			ifmgd->assoc_data->timeout_started = true;
4301 4302 4303
		}
	}

4304
	if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
J
Johannes Berg 已提交
4305 4306 4307 4308 4309 4310 4311
	    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);
4312
		} else if (ieee80211_auth(sdata)) {
J
Johannes Berg 已提交
4313
			u8 bssid[ETH_ALEN];
4314 4315 4316 4317 4318
			struct ieee80211_event event = {
				.type = MLME_EVENT,
				.u.mlme.data = AUTH_EVENT,
				.u.mlme.status = MLME_TIMEOUT,
			};
J
Johannes Berg 已提交
4319 4320 4321 4322 4323

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

			ieee80211_destroy_auth_data(sdata, false);

4324
			cfg80211_auth_timeout(sdata->dev, bssid);
4325
			drv_event_callback(sdata->local, sdata, &event);
J
Johannes Berg 已提交
4326
		}
4327
	} else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4328
		run_again(sdata, ifmgd->auth_data->timeout);
J
Johannes Berg 已提交
4329

4330
	if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
J
Johannes Berg 已提交
4331
	    time_after(jiffies, ifmgd->assoc_data->timeout)) {
4332
		if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
J
Johannes Berg 已提交
4333
		    ieee80211_do_assoc(sdata)) {
4334
			struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4335 4336 4337 4338 4339
			struct ieee80211_event event = {
				.type = MLME_EVENT,
				.u.mlme.data = ASSOC_EVENT,
				.u.mlme.status = MLME_TIMEOUT,
			};
J
Johannes Berg 已提交
4340

4341
			ieee80211_destroy_assoc_data(sdata, false, false);
4342
			cfg80211_assoc_timeout(sdata->dev, bss);
4343
			drv_event_callback(sdata->local, sdata, &event);
J
Johannes Berg 已提交
4344
		}
4345
	} else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4346
		run_again(sdata, ifmgd->assoc_data->timeout);
J
Johannes Berg 已提交
4347

4348
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
J
Johannes Berg 已提交
4349
	    ifmgd->associated) {
4350
		u8 bssid[ETH_ALEN];
4351
		int max_tries;
4352

4353
		memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4354

4355
		if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4356
			max_tries = max_nullfunc_tries;
4357
		else
4358
			max_tries = max_probe_tries;
4359

4360 4361 4362
		/* ACK received for nullfunc probing frame */
		if (!ifmgd->probe_send_count)
			ieee80211_reset_ap_probe(sdata);
4363 4364
		else if (ifmgd->nullfunc_failed) {
			if (ifmgd->probe_send_count < max_tries) {
J
Johannes Berg 已提交
4365 4366 4367 4368
				mlme_dbg(sdata,
					 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
					 bssid, ifmgd->probe_send_count,
					 max_tries);
4369 4370
				ieee80211_mgd_probe_ap_send(sdata);
			} else {
J
Johannes Berg 已提交
4371 4372 4373
				mlme_dbg(sdata,
					 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
					 bssid);
4374
				ieee80211_sta_connection_lost(sdata, bssid,
4375 4376
					WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
					false);
4377 4378
			}
		} else if (time_is_after_jiffies(ifmgd->probe_timeout))
4379
			run_again(sdata, ifmgd->probe_timeout);
4380
		else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
J
Johannes Berg 已提交
4381 4382 4383
			mlme_dbg(sdata,
				 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
				 bssid, probe_wait_ms);
4384
			ieee80211_sta_connection_lost(sdata, bssid,
4385
				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4386
		} else if (ifmgd->probe_send_count < max_tries) {
J
Johannes Berg 已提交
4387 4388 4389 4390
			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);
4391 4392
			ieee80211_mgd_probe_ap_send(sdata);
		} else {
J
Johannes Berg 已提交
4393 4394 4395 4396
			/*
			 * We actually lost the connection ... or did we?
			 * Let's make sure!
			 */
4397 4398 4399
			mlme_dbg(sdata,
				 "No probe response from AP %pM after %dms, disconnecting.\n",
				 bssid, probe_wait_ms);
4400

4401
			ieee80211_sta_connection_lost(sdata, bssid,
4402
				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
J
Johannes Berg 已提交
4403 4404 4405
		}
	}

4406
	sdata_unlock(sdata);
4407 4408
}

4409
static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
J
Johannes Berg 已提交
4410 4411
{
	struct ieee80211_sub_if_data *sdata =
4412
		from_timer(sdata, t, u.mgd.bcn_mon_timer);
4413
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
4414

4415
	if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
M
Michal Kazior 已提交
4416 4417
		return;

4418
	sdata->u.mgd.connection_loss = false;
4419 4420
	ieee80211_queue_work(&sdata->local->hw,
			     &sdata->u.mgd.beacon_connection_loss_work);
J
Johannes Berg 已提交
4421 4422
}

4423
static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
J
Johannes Berg 已提交
4424 4425
{
	struct ieee80211_sub_if_data *sdata =
4426
		from_timer(sdata, t, u.mgd.conn_mon_timer);
J
Johannes Berg 已提交
4427 4428 4429
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_local *local = sdata->local;

4430
	if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
M
Michal Kazior 已提交
4431 4432
		return;

4433
	ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
J
Johannes Berg 已提交
4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444
}

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
4445 4446
static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
{
4447
	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4448
		__ieee80211_stop_poll(sdata);
4449

J
Johannes Berg 已提交
4450
		/* let's probe the connection once */
4451
		if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4452 4453
			ieee80211_queue_work(&sdata->local->hw,
					     &sdata->u.mgd.monitor_work);
4454
	}
J
Johannes Berg 已提交
4455
}
4456

4457
#ifdef CONFIG_PM
4458 4459 4460 4461 4462 4463 4464
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);

4465 4466 4467 4468 4469
	if (ifmgd->auth_data || ifmgd->assoc_data) {
		const u8 *bssid = ifmgd->auth_data ?
				ifmgd->auth_data->bss->bssid :
				ifmgd->assoc_data->bss->bssid;

4470
		/*
4471 4472 4473
		 * 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.
4474
		 */
4475
		ieee80211_send_deauth_disassoc(sdata, bssid,
4476 4477 4478
					       IEEE80211_STYPE_DEAUTH,
					       WLAN_REASON_DEAUTH_LEAVING,
					       false, frame_buf);
4479
		if (ifmgd->assoc_data)
4480
			ieee80211_destroy_assoc_data(sdata, false, true);
4481 4482
		if (ifmgd->auth_data)
			ieee80211_destroy_auth_data(sdata, false);
4483 4484 4485 4486
		cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
				      IEEE80211_DEAUTH_FRAME_LEN);
	}

4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514
	/* 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);
	}

4515 4516 4517
	sdata_unlock(sdata);
}

4518 4519 4520 4521
void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

4522
	sdata_lock(sdata);
4523
	if (!ifmgd->associated) {
4524
		sdata_unlock(sdata);
4525 4526 4527 4528 4529 4530 4531 4532 4533 4534
		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);
4535
		sdata_unlock(sdata);
4536 4537
		return;
	}
4538
	sdata_unlock(sdata);
4539 4540 4541
}
#endif

J
Johannes Berg 已提交
4542 4543
/* interface setup */
void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4544
{
4545
	struct ieee80211_if_managed *ifmgd;
J
Johannes Berg 已提交
4546

4547
	ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
4548
	INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4549
	INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4550 4551
	INIT_WORK(&ifmgd->beacon_connection_loss_work,
		  ieee80211_beacon_connection_loss_work);
4552 4553
	INIT_WORK(&ifmgd->csa_connection_drop_work,
		  ieee80211_csa_connection_drop_work);
4554
	INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4555 4556
	INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
			  ieee80211_tdls_peer_del_work);
4557 4558 4559 4560
	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);
4561 4562
	INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
			  ieee80211_sta_handle_tspec_ac_params_wk);
J
Johannes Berg 已提交
4563

4564
	ifmgd->flags = 0;
4565
	ifmgd->powersave = sdata->wdev.ps;
4566 4567
	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
4568
	ifmgd->p2p_noa_index = -1;
J
Johannes Berg 已提交
4569

4570
	if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4571 4572 4573
		ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
	else
		ifmgd->req_smps = IEEE80211_SMPS_OFF;
4574 4575 4576 4577 4578

	/* Setup TDLS data */
	spin_lock_init(&ifmgd->teardown_lock);
	ifmgd->teardown_skb = NULL;
	ifmgd->orig_teardown_skb = NULL;
4579 4580
}

4581 4582
/* scan finished notification */
void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
J
Johannes Berg 已提交
4583
{
4584
	struct ieee80211_sub_if_data *sdata;
J
Johannes Berg 已提交
4585

4586 4587
	/* Restart STA timers */
	rcu_read_lock();
4588 4589 4590 4591
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		if (ieee80211_sdata_running(sdata))
			ieee80211_restart_sta_timer(sdata);
	}
4592 4593
	rcu_read_unlock();
}
J
Johannes Berg 已提交
4594

J
Johannes Berg 已提交
4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606
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;

4607
	ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
J
Johannes Berg 已提交
4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619
	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;

4620
	vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
J
Johannes Berg 已提交
4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638
	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
4639 4640 4641 4642 4643 4644
static bool
ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
				    const struct ieee80211_he_operation *he_op)
{
	const struct ieee80211_sta_he_cap *sta_he_cap =
		ieee80211_get_he_sta_cap(sband);
4645
	u16 ap_min_req_set;
L
Luca Coelho 已提交
4646 4647 4648 4649 4650
	int i;

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

4651 4652
	ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);

L
Luca Coelho 已提交
4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700
	/* 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;
}

4701 4702
static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
				  struct cfg80211_bss *cbss)
4703 4704 4705
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4706
	const struct ieee80211_ht_cap *ht_cap = NULL;
4707
	const struct ieee80211_ht_operation *ht_oper = NULL;
J
Johannes Berg 已提交
4708
	const struct ieee80211_vht_operation *vht_oper = NULL;
L
Luca Coelho 已提交
4709
	const struct ieee80211_he_operation *he_oper = NULL;
4710
	struct ieee80211_supported_band *sband;
4711
	struct cfg80211_chan_def chandef;
J
Johannes Berg 已提交
4712
	int ret;
4713 4714
	u32 i;
	bool have_80mhz;
4715

4716 4717
	sband = local->hw.wiphy->bands[cbss->channel->band];

J
Johannes Berg 已提交
4718 4719 4720 4721
	ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
			  IEEE80211_STA_DISABLE_80P80MHZ |
			  IEEE80211_STA_DISABLE_160MHZ);

4722 4723
	rcu_read_lock();

J
Johannes Berg 已提交
4724 4725
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
	    sband->ht_cap.ht_supported) {
4726
		const u8 *ht_oper_ie, *ht_cap_ie;
4727

4728
		ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4729 4730
		if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
			ht_oper = (void *)(ht_oper_ie + 2);
4731

4732 4733 4734 4735 4736
		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) {
4737 4738 4739
			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
			ht_oper = NULL;
		}
4740 4741
	}

J
Johannes Berg 已提交
4742 4743
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
	    sband->vht_cap.vht_supported) {
4744
		const u8 *vht_oper_ie, *vht_cap;
J
Johannes Berg 已提交
4745

4746 4747
		vht_oper_ie = ieee80211_bss_get_ie(cbss,
						   WLAN_EID_VHT_OPERATION);
J
Johannes Berg 已提交
4748 4749 4750 4751
		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
4752
			sdata_info(sdata,
J
Johannes Berg 已提交
4753
				   "AP advertised VHT without HT, disabling both\n");
4754 4755
			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4756
		}
4757 4758 4759 4760 4761 4762

		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;
		}
4763 4764
	}

4765 4766 4767 4768
	if (!ieee80211_get_he_sta_cap(sband))
		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;

	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
L
Luca Coelho 已提交
4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780
		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 &&
		    he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
			he_oper = (void *)(he_oper_ie + 3);
		else
			he_oper = NULL;

4781
		if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
L
Luca Coelho 已提交
4782 4783 4784
			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
	}

4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798
	/* 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;

J
Johannes Berg 已提交
4799 4800
	ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
						     cbss->channel,
L
Luca Coelho 已提交
4801
						     ht_oper, vht_oper, he_oper,
4802
						     &chandef, false);
4803

J
Johannes Berg 已提交
4804 4805
	sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
				      local->rx_chains);
4806

4807 4808
	rcu_read_unlock();

4809 4810 4811
	/* will change later if needed */
	sdata->smps_mode = IEEE80211_SMPS_OFF;

4812
	mutex_lock(&local->mtx);
J
Johannes Berg 已提交
4813 4814 4815 4816 4817 4818 4819
	/*
	 * 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);
4820 4821 4822 4823

	/* don't downgrade for 5 and 10 MHz channels, though. */
	if (chandef.width == NL80211_CHAN_WIDTH_5 ||
	    chandef.width == NL80211_CHAN_WIDTH_10)
4824
		goto out;
4825

4826
	while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4827
		ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4828 4829 4830
		ret = ieee80211_vif_use_channel(sdata, &chandef,
						IEEE80211_CHANCTX_SHARED);
	}
4831 4832
 out:
	mutex_unlock(&local->mtx);
J
Johannes Berg 已提交
4833
	return ret;
4834 4835
}

S
Sara Sharon 已提交
4836 4837 4838 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869
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;
}

4870
static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4871 4872
				     struct cfg80211_bss *cbss, bool assoc,
				     bool override)
4873 4874 4875 4876 4877
{
	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;
4878
	struct ieee80211_supported_band *sband;
4879
	bool have_sta = false;
4880 4881
	int err;

4882 4883
	sband = local->hw.wiphy->bands[cbss->channel->band];

4884 4885 4886
	if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
		return -EINVAL;

4887 4888 4889 4890
	/* If a reconfig is happening, bail out */
	if (local->in_reconfig)
		return -EBUSY;

4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901
	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;
	}
4902

4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915
	/*
	 * 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
4916
	if (new_sta) {
4917 4918 4919
		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
4920
		const struct cfg80211_bss_ies *ies;
4921
		int shift = ieee80211_vif_get_shift(&sdata->vif);
4922 4923 4924 4925 4926

		ieee80211_get_rates(sband, bss->supp_rates,
				    bss->supp_rates_len,
				    &rates, &basic_rates,
				    &have_higher_than_11mbit,
4927
				    &min_rate, &min_rate_index,
4928
				    shift);
4929 4930 4931 4932 4933 4934 4935 4936 4937 4938

		/*
		 * This used to be a workaround for basic rates missing
		 * in the association response frame. Now that we no
		 * longer use the basic rates from there, it probably
		 * doesn't happen any more, but keep the workaround so
		 * in case some *other* APs are buggy in different ways
		 * we can connect -- with a warning.
		 */
		if (!basic_rates && min_rate_index >= 0) {
J
Johannes Berg 已提交
4939 4940
			sdata_info(sdata,
				   "No basic rates, using min rate instead\n");
4941 4942 4943
			basic_rates = BIT(min_rate_index);
		}

J
Johannes Berg 已提交
4944
		new_sta->sta.supp_rates[cbss->channel->band] = rates;
4945 4946 4947
		sdata->vif.bss_conf.basic_rates = basic_rates;

		/* cf. IEEE 802.11 9.2.12 */
4948
		if (cbss->channel->band == NL80211_BAND_2GHZ &&
4949 4950 4951 4952 4953 4954 4955
		    have_higher_than_11mbit)
			sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
		else
			sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;

		memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);

4956 4957
		/* set timing information */
		sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
J
Johannes Berg 已提交
4958
		rcu_read_lock();
4959 4960 4961 4962 4963
		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
4964 4965 4966 4967

			ieee80211_get_dtim(ies,
					   &sdata->vif.bss_conf.sync_dtim_count,
					   NULL);
4968 4969
		} else if (!ieee80211_hw_check(&sdata->local->hw,
					       TIMING_BEACON_ONLY)) {
4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980
			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
4981
		rcu_read_unlock();
4982
	}
4983

4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996 4997
	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
		 */
4998
		ieee80211_bss_info_change_notify(sdata,
4999 5000
			BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
			BSS_CHANGED_BEACON_INT);
5001 5002

		if (assoc)
J
Johannes Berg 已提交
5003
			sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5004

J
Johannes Berg 已提交
5005 5006
		err = sta_info_insert(new_sta);
		new_sta = NULL;
5007
		if (err) {
J
Johannes Berg 已提交
5008 5009 5010
			sdata_info(sdata,
				   "failed to insert STA entry for the AP (error %d)\n",
				   err);
5011 5012 5013
			return err;
		}
	} else
5014
		WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5015

5016 5017 5018 5019
	/* Cancel scan to ensure that nothing interferes with connection */
	if (local->scanning)
		ieee80211_scan_cancel(local);

5020 5021 5022
	return 0;
}

5023 5024 5025
/* config hooks */
int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
		       struct cfg80211_auth_request *req)
J
Johannes Berg 已提交
5026
{
J
Johannes Berg 已提交
5027 5028 5029
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_mgd_auth_data *auth_data;
5030
	u16 auth_alg;
J
Johannes Berg 已提交
5031
	int err;
5032
	bool cont_auth;
J
Johannes Berg 已提交
5033 5034

	/* prepare auth data structure */
J
Johannes Berg 已提交
5035

5036 5037 5038 5039 5040
	switch (req->auth_type) {
	case NL80211_AUTHTYPE_OPEN_SYSTEM:
		auth_alg = WLAN_AUTH_OPEN;
		break;
	case NL80211_AUTHTYPE_SHARED_KEY:
J
Johannes Berg 已提交
5041
		if (IS_ERR(local->wep_tx_tfm))
5042
			return -EOPNOTSUPP;
5043 5044 5045 5046 5047 5048 5049 5050
		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;
5051 5052 5053
	case NL80211_AUTHTYPE_SAE:
		auth_alg = WLAN_AUTH_SAE;
		break;
5054 5055 5056 5057 5058 5059 5060 5061 5062
	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;
5063 5064
	default:
		return -EOPNOTSUPP;
J
Johannes Berg 已提交
5065
	}
5066

5067
	if (ifmgd->assoc_data)
5068 5069
		return -EBUSY;

5070
	auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5071
			    req->ie_len, GFP_KERNEL);
J
Johannes Berg 已提交
5072
	if (!auth_data)
J
Johannes Berg 已提交
5073
		return -ENOMEM;
5074

J
Johannes Berg 已提交
5075
	auth_data->bss = req->bss;
5076

5077
	if (req->auth_data_len >= 4) {
5078 5079 5080 5081 5082 5083
		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]);
		}
5084 5085 5086
		memcpy(auth_data->data, req->auth_data + 4,
		       req->auth_data_len - 4);
		auth_data->data_len += req->auth_data_len - 4;
5087 5088
	}

5089 5090 5091 5092 5093 5094 5095
	/* 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;

5096
	if (req->ie && req->ie_len) {
5097 5098 5099
		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
5100
	}
5101

J
Johannes Berg 已提交
5102
	if (req->key && req->key_len) {
J
Johannes Berg 已提交
5103 5104 5105
		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
5106 5107
	}

J
Johannes Berg 已提交
5108
	auth_data->algorithm = auth_alg;
J
Johannes Berg 已提交
5109

J
Johannes Berg 已提交
5110
	/* try to authenticate/probe */
5111

5112 5113 5114 5115 5116 5117 5118
	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);
	}
5119

J
Johannes Berg 已提交
5120 5121
	/* prep auth_data so we don't go into idle on disassoc */
	ifmgd->auth_data = auth_data;
J
Johannes Berg 已提交
5122

5123 5124 5125 5126 5127 5128 5129 5130 5131
	/* 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);

5132 5133 5134
	if (ifmgd->associated) {
		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];

5135 5136 5137
		sdata_info(sdata,
			   "disconnect from AP %pM for new auth to %pM\n",
			   ifmgd->associated->bssid, req->bss->bssid);
5138 5139 5140 5141
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       WLAN_REASON_UNSPECIFIED,
				       false, frame_buf);

5142 5143 5144
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    WLAN_REASON_UNSPECIFIED);
5145
	}
J
Johannes Berg 已提交
5146

J
Johannes Berg 已提交
5147
	sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5148

5149
	err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5150
	if (err)
J
Johannes Berg 已提交
5151
		goto err_clear;
J
Johannes Berg 已提交
5152

5153
	err = ieee80211_auth(sdata);
J
Johannes Berg 已提交
5154 5155 5156 5157 5158 5159
	if (err) {
		sta_info_destroy_addr(sdata, req->bss->bssid);
		goto err_clear;
	}

	/* hold our own reference */
5160
	cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5161
	return 0;
J
Johannes Berg 已提交
5162 5163

 err_clear:
5164
	eth_zero_addr(ifmgd->bssid);
5165
	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
J
Johannes Berg 已提交
5166
	ifmgd->auth_data = NULL;
5167 5168 5169
	mutex_lock(&sdata->local->mtx);
	ieee80211_vif_release_channel(sdata);
	mutex_unlock(&sdata->local->mtx);
J
Johannes Berg 已提交
5170 5171
	kfree(auth_data);
	return err;
J
Johannes Berg 已提交
5172 5173
}

5174 5175
int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
			struct cfg80211_assoc_request *req)
5176
{
J
Johannes Berg 已提交
5177
	struct ieee80211_local *local = sdata->local;
5178
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5179
	struct ieee80211_bss *bss = (void *)req->bss->priv;
J
Johannes Berg 已提交
5180
	struct ieee80211_mgd_assoc_data *assoc_data;
5181
	const struct cfg80211_bss_ies *beacon_ies;
J
Johannes Berg 已提交
5182
	struct ieee80211_supported_band *sband;
5183
	const u8 *ssidie, *ht_ie, *vht_ie;
5184
	int i, err;
5185
	bool override = false;
5186

J
Johannes Berg 已提交
5187 5188 5189 5190
	assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
	if (!assoc_data)
		return -ENOMEM;

5191 5192 5193 5194 5195 5196 5197 5198 5199 5200 5201
	rcu_read_lock();
	ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
	if (!ssidie) {
		rcu_read_unlock();
		kfree(assoc_data);
		return -EINVAL;
	}
	memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
	assoc_data->ssid_len = ssidie[1];
	rcu_read_unlock();

5202 5203 5204
	if (ifmgd->associated) {
		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];

5205 5206 5207
		sdata_info(sdata,
			   "disconnect from AP %pM for new assoc to %pM\n",
			   ifmgd->associated->bssid, req->bss->bssid);
5208 5209 5210 5211
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       WLAN_REASON_UNSPECIFIED,
				       false, frame_buf);

5212 5213 5214
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    WLAN_REASON_UNSPECIFIED);
5215
	}
J
Johannes Berg 已提交
5216 5217 5218 5219

	if (ifmgd->auth_data && !ifmgd->auth_data->done) {
		err = -EBUSY;
		goto err_free;
J
Johannes Berg 已提交
5220
	}
5221

J
Johannes Berg 已提交
5222 5223 5224 5225
	if (ifmgd->assoc_data) {
		err = -EBUSY;
		goto err_free;
	}
5226

J
Johannes Berg 已提交
5227 5228 5229 5230
	if (ifmgd->auth_data) {
		bool match;

		/* keep sta info, bssid if matching */
5231
		match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
J
Johannes Berg 已提交
5232
		ieee80211_destroy_auth_data(sdata, match);
5233 5234
	}

J
Johannes Berg 已提交
5235
	/* prepare assoc data */
5236

5237 5238
	ifmgd->beacon_crc_valid = false;

5239 5240 5241
	assoc_data->wmm = bss->wmm_used &&
			  (local->hw.queues >= IEEE80211_NUM_ACS);

J
Johannes Berg 已提交
5242 5243 5244 5245 5246 5247 5248
	/*
	 * 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.
	 */
5249
	for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5250 5251
		if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5252
		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5253
			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5254
			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
L
Luca Coelho 已提交
5255
			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5256
			netdev_info(sdata->dev,
L
Luca Coelho 已提交
5257
				    "disabling HE/HT/VHT due to WEP/TKIP use\n");
5258 5259
		}
	}
5260

J
Johannes Berg 已提交
5261 5262 5263
	/* Also disable HT if we don't support it or the AP doesn't use WMM */
	sband = local->hw.wiphy->bands[req->bss->channel->band];
	if (!sband->ht_cap.ht_supported ||
5264 5265
	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
	    ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5266
		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5267 5268
		if (!bss->wmm_used &&
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5269 5270
			netdev_info(sdata->dev,
				    "disabling HT as WMM/QoS is not supported by the AP\n");
5271
	}
J
Johannes Berg 已提交
5272

5273 5274
	/* disable VHT if we don't support it or the AP doesn't use WMM */
	if (!sband->vht_cap.vht_supported ||
5275 5276
	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
	    ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5277
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5278 5279
		if (!bss->wmm_used &&
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5280 5281
			netdev_info(sdata->dev,
				    "disabling VHT as WMM/QoS is not supported by the AP\n");
5282 5283
	}

B
Ben Greear 已提交
5284 5285 5286 5287
	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));

5288 5289 5290 5291
	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));

5292
	if (req->ie && req->ie_len) {
J
Johannes Berg 已提交
5293 5294 5295
		memcpy(assoc_data->ie, req->ie, req->ie_len);
		assoc_data->ie_len = req->ie_len;
	}
5296

5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311
	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
5312
	assoc_data->bss = req->bss;
5313

J
Johannes Berg 已提交
5314 5315
	if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
		if (ifmgd->powersave)
5316
			sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
J
Johannes Berg 已提交
5317
		else
5318
			sdata->smps_mode = IEEE80211_SMPS_OFF;
J
Johannes Berg 已提交
5319
	} else
5320
		sdata->smps_mode = ifmgd->req_smps;
J
Johannes Berg 已提交
5321

J
Johannes Berg 已提交
5322 5323 5324
	assoc_data->capability = req->bss->capability;
	assoc_data->supp_rates = bss->supp_rates;
	assoc_data->supp_rates_len = bss->supp_rates_len;
5325

5326
	rcu_read_lock();
5327 5328 5329 5330 5331
	ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
	if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
		assoc_data->ap_ht_param =
			((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
	else
5332
		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5333 5334 5335 5336 5337 5338
	vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
	if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
		memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
		       sizeof(struct ieee80211_vht_cap));
	else
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5339
	rcu_read_unlock();
5340

5341
	if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5342
		 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5343 5344 5345
	     "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
		sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;

K
Kalle Valo 已提交
5346
	if (bss->wmm_used && bss->uapsd_supported &&
5347
	    (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5348
		assoc_data->uapsd = true;
K
Kalle Valo 已提交
5349 5350
		ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
	} else {
5351
		assoc_data->uapsd = false;
K
Kalle Valo 已提交
5352 5353 5354
		ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
	}

5355
	if (req->prev_bssid)
J
Johannes Berg 已提交
5356
		memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5357 5358 5359 5360 5361 5362 5363 5364 5365

	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;
	}

5366 5367 5368 5369 5370
	if (req->flags & ASSOC_REQ_USE_RRM)
		ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
	else
		ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;

5371 5372 5373 5374 5375
	if (req->crypto.control_port)
		ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
	else
		ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;

5376 5377
	sdata->control_port_protocol = req->crypto.control_port_ethertype;
	sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5378 5379
	sdata->control_port_over_nl80211 =
					req->crypto.control_port_over_nl80211;
5380 5381
	sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
							sdata->vif.type);
5382

J
Johannes Berg 已提交
5383 5384 5385
	/* kick off associate process */

	ifmgd->assoc_data = assoc_data;
5386
	ifmgd->dtim_period = 0;
5387
	ifmgd->have_beacon = false;
J
Johannes Berg 已提交
5388

5389 5390 5391 5392 5393 5394 5395 5396 5397 5398 5399 5400 5401 5402 5403 5404 5405 5406 5407 5408 5409 5410 5411 5412 5413 5414 5415 5416 5417 5418
	/* override HT/VHT configuration only if the AP and we support it */
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
		struct ieee80211_sta_ht_cap sta_ht_cap;

		if (req->flags & ASSOC_REQ_DISABLE_HT)
			override = true;

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

		/* check for 40 MHz disable override */
		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
		    sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
		    !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
			override = true;

		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
		    req->flags & ASSOC_REQ_DISABLE_VHT)
			override = true;
	}

	if (req->flags & ASSOC_REQ_DISABLE_HT) {
		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
	}

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

	err = ieee80211_prep_connection(sdata, req->bss, true, override);
5419 5420
	if (err)
		goto err_clear;
J
Johannes Berg 已提交
5421

5422 5423
	rcu_read_lock();
	beacon_ies = rcu_dereference(req->bss->beacon_ies);
5424

5425
	if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5426 5427 5428 5429 5430 5431 5432 5433
	    !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);
5434
		assoc_data->timeout_started = true;
5435 5436
		assoc_data->need_beacon = true;
	} else if (beacon_ies) {
S
Sara Sharon 已提交
5437
		const u8 *ie;
5438 5439
		u8 dtim_count = 0;

S
Sara Sharon 已提交
5440 5441 5442
		ieee80211_get_dtim(beacon_ies, &dtim_count,
				   &ifmgd->dtim_period);

5443
		ifmgd->have_beacon = true;
J
Johannes Berg 已提交
5444
		assoc_data->timeout = jiffies;
5445
		assoc_data->timeout_started = true;
5446

5447
		if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5448 5449 5450 5451 5452
			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
5453 5454 5455 5456 5457 5458 5459 5460 5461 5462 5463

		ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
					  beacon_ies->data, beacon_ies->len);
		if (ie && ie[1] >= 3)
			sdata->vif.bss_conf.profile_periodicity = ie[4];

		ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY,
				      beacon_ies->data, beacon_ies->len);
		if (ie && ie[1] >= 11 &&
		    (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
			sdata->vif.bss_conf.ema_ap = true;
5464 5465
	} else {
		assoc_data->timeout = jiffies;
5466
		assoc_data->timeout_started = true;
J
Johannes Berg 已提交
5467
	}
5468 5469
	rcu_read_unlock();

5470
	run_again(sdata, assoc_data->timeout);
J
Johannes Berg 已提交
5471

P
Paul Stewart 已提交
5472 5473 5474 5475 5476 5477 5478 5479 5480 5481
	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
5482 5483
		sdata_info(sdata, "associating with AP with corrupt %s\n",
			   corrupt_type);
P
Paul Stewart 已提交
5484 5485
	}

5486
	return 0;
J
Johannes Berg 已提交
5487
 err_clear:
5488
	eth_zero_addr(ifmgd->bssid);
5489
	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
J
Johannes Berg 已提交
5490 5491 5492 5493
	ifmgd->assoc_data = NULL;
 err_free:
	kfree(assoc_data);
	return err;
5494 5495
}

5496
int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5497
			 struct cfg80211_deauth_request *req)
5498
{
5499
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5500
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5501
	bool tx = !req->local_state_change;
5502

5503 5504 5505 5506 5507 5508
	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));
5509

5510
		drv_mgd_prepare_tx(sdata->local, sdata, 0);
5511 5512
		ieee80211_send_deauth_disassoc(sdata, req->bssid,
					       IEEE80211_STYPE_DEAUTH,
5513
					       req->reason_code, tx,
5514
					       frame_buf);
5515
		ieee80211_destroy_auth_data(sdata, false);
5516 5517 5518
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    req->reason_code);
5519

5520
		return 0;
5521 5522
	}

5523 5524 5525 5526 5527 5528 5529
	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));

5530
		drv_mgd_prepare_tx(sdata->local, sdata, 0);
5531 5532 5533 5534
		ieee80211_send_deauth_disassoc(sdata, req->bssid,
					       IEEE80211_STYPE_DEAUTH,
					       req->reason_code, tx,
					       frame_buf);
5535
		ieee80211_destroy_assoc_data(sdata, false, true);
5536 5537 5538 5539 5540 5541
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    req->reason_code);
		return 0;
	}

5542 5543
	if (ifmgd->associated &&
	    ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5544 5545 5546 5547 5548
		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));

5549 5550
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       req->reason_code, tx, frame_buf);
5551 5552 5553
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    req->reason_code);
5554 5555
		return 0;
	}
5556

5557
	return -ENOTCONN;
5558
}
5559

5560
int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5561
			   struct cfg80211_disassoc_request *req)
J
Johannes Berg 已提交
5562
{
5563
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5564
	u8 bssid[ETH_ALEN];
5565
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
J
Johannes Berg 已提交
5566

J
Johannes Berg 已提交
5567 5568 5569 5570 5571 5572
	/*
	 * 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.
	 */
5573
	if (ifmgd->associated != req->bss)
5574 5575
		return -ENOLINK;

J
Johannes Berg 已提交
5576
	sdata_info(sdata,
5577 5578
		   "disassociating from %pM by local choice (Reason: %u=%s)\n",
		   req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5579

5580
	memcpy(bssid, req->bss->bssid, ETH_ALEN);
5581 5582 5583
	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
			       req->reason_code, !req->local_state_change,
			       frame_buf);
5584

5585 5586
	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
				    req->reason_code);
5587

5588 5589
	return 0;
}
5590

5591
void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5592 5593 5594
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

5595 5596 5597 5598 5599 5600 5601 5602 5603 5604
	/*
	 * 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);
5605
	cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5606

5607
	sdata_lock(sdata);
5608 5609
	if (ifmgd->assoc_data) {
		struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5610
		ieee80211_destroy_assoc_data(sdata, false, false);
5611 5612
		cfg80211_assoc_timeout(sdata->dev, bss);
	}
5613 5614
	if (ifmgd->auth_data)
		ieee80211_destroy_auth_data(sdata, false);
5615 5616 5617 5618 5619 5620
	spin_lock_bh(&ifmgd->teardown_lock);
	if (ifmgd->teardown_skb) {
		kfree_skb(ifmgd->teardown_skb);
		ifmgd->teardown_skb = NULL;
		ifmgd->orig_teardown_skb = NULL;
	}
5621 5622 5623
	kfree(ifmgd->assoc_req_ies);
	ifmgd->assoc_req_ies = NULL;
	ifmgd->assoc_req_ies_len = 0;
5624
	spin_unlock_bh(&ifmgd->teardown_lock);
5625
	del_timer_sync(&ifmgd->timer);
5626
	sdata_unlock(sdata);
5627 5628
}

5629 5630
void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
			       enum nl80211_cqm_rssi_threshold_event rssi_event,
5631
			       s32 rssi_level,
5632 5633 5634 5635
			       gfp_t gfp)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

5636
	trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
J
Johannes Berg 已提交
5637

5638
	cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5639 5640
}
EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5641 5642 5643 5644 5645 5646 5647 5648 5649 5650

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);