mlme.c 161.4 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        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)
533
{
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;
	u8 *pos, qos_info;
	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;
	}
664
	chan = chanctx_conf->def.chan;
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	rcu_read_unlock();
	sband = local->hw.wiphy->bands[chan->band];
667
	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);
	*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) {
771 772 773
			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) {
786 787 788 789
				int rate;
				rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
						    5 * (1 << shift));
				*pos++ = (u8) rate;
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			}
		}
	}

794 795
	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 */
800 801
		 /* max tx power */
		*pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
802
	}
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804
	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*/
		}
	}

816 817 818 819 820 821 822 823 824 825 826 827 828 829 830
	/* 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 */
832
	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,
843 844
			WLAN_EID_FAST_BSS_TRANSITION,	/* reassoc only */
			WLAN_EID_RIC_DATA,		/* reassoc only */
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			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
		};
847 848 849 850
		static const u8 after_ric[] = {
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
			WLAN_EID_HT_CAPABILITY,
			WLAN_EID_BSS_COEX_2040,
851
			/* luckily this is almost always there */
852 853 854 855
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_QOS_TRAFFIC_CAPA,
			WLAN_EID_TIM_BCAST_REQ,
			WLAN_EID_INTERWORKING,
856
			/* 60 GHz (Multi-band, DMG, MMS) can't happen */
857 858 859 860 861 862 863 864 865 866 867
			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);
868
		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;

876
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
877
		ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
878
				    sband, chan, sdata->smps_mode);
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880 881 882
	/* if present, add any custom IEs that go before VHT */
	if (assoc_data->ie_len) {
		static const u8 before_vht[] = {
883 884 885 886
			/*
			 * no need to list the ones split off before HT
			 * or generated here
			 */
887 888 889 890 891
			WLAN_EID_BSS_COEX_2040,
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_QOS_TRAFFIC_CAPA,
			WLAN_EID_TIM_BCAST_REQ,
			WLAN_EID_INTERWORKING,
892
			/* 60 GHz (Multi-band, DMG, MMS) can't happen */
893
		};
894 895

		/* RIC already taken above, so no need to handle here anymore */
896 897 898
		noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
					     before_vht, ARRAY_SIZE(before_vht),
					     offset);
899
		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
900 901 902
		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;
	}

930
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
931 932
		ieee80211_add_vht_ie(sdata, skb, sband,
				     &assoc_data->ap_vht_cap);
933

934 935 936 937 938 939 940 941 942
	/*
	 * 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 */
947
	if (assoc_data->ie_len) {
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		noffset = ieee80211_ie_split_vendor(assoc_data->ie,
						    assoc_data->ie_len,
						    offset);
951
		skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
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		offset = noffset;
	}

955 956
	if (assoc_data->wmm) {
		if (assoc_data->uapsd) {
957 958
			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;
		}

964
		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 */
968
	if (assoc_data->ie_len) {
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		noffset = assoc_data->ie_len;
970
		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;
	}

979
	drv_mgd_prepare_tx(local, sdata, 0);
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	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
982
	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
983 984
		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;

994 995
	skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
	if (!skb)
996 997
		return;

998 999
	pspoll = (struct ieee80211_pspoll *) skb->data;
	pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1000

1001 1002
	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
	ieee80211_tx_skb(sdata, skb);
1003 1004
}

1005 1006
void ieee80211_send_nullfunc(struct ieee80211_local *local,
			     struct ieee80211_sub_if_data *sdata,
1007
			     bool powersave)
1008 1009
{
	struct sk_buff *skb;
1010
	struct ieee80211_hdr_3addr *nullfunc;
1011
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1012

L
Luca Coelho 已提交
1013 1014 1015 1016 1017
	/* Don't send NDPs when STA is connected HE */
	if (sdata->vif.type == NL80211_IFTYPE_STATION &&
	    !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
		return;

1018 1019
	skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
		!ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1020
	if (!skb)
1021 1022
		return;

1023
	nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1024
	if (powersave)
1025
		nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1026

1027 1028
	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
					IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1029

1030
	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1031 1032
		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;

1033
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1034 1035
		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;

1036
	ieee80211_tx_skb(sdata, skb);
1037 1038
}

1039 1040 1041 1042 1043 1044 1045 1046 1047 1048
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
1049 1050 1051 1052
	/* Don't send NDPs when connected HE */
	if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
		return;

1053
	skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1054
	if (!skb)
1055
		return;
1056

1057 1058
	skb_reserve(skb, local->hw.extra_tx_headroom);

1059
	nullfunc = skb_put_zero(skb, 30);
1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071
	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);
}

1072 1073 1074 1075 1076
/* 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);
1077
	struct ieee80211_local *local = sdata->local;
1078
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1079
	int ret;
1080

1081
	if (!ieee80211_sdata_running(sdata))
1082 1083
		return;

1084
	sdata_lock(sdata);
1085 1086 1087
	mutex_lock(&local->mtx);
	mutex_lock(&local->chanctx_mtx);

1088 1089
	if (!ifmgd->associated)
		goto out;
1090

1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
	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) {
1102 1103 1104 1105
		struct ieee80211_supported_band *sband = NULL;
		struct sta_info *mgd_sta = NULL;
		enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;

1106 1107 1108 1109 1110 1111 1112 1113
		/*
		 * 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;

1114 1115 1116 1117 1118 1119 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
		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);
		}

1156 1157 1158 1159 1160 1161 1162 1163 1164 1165
		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;
		}

1166 1167 1168 1169 1170 1171 1172
		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);
		}

1173 1174 1175 1176 1177
		goto out;
	}

	if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
					&sdata->csa_chandef)) {
1178
		sdata_info(sdata,
1179
			   "failed to finalize channel switch, disconnecting\n");
1180 1181 1182 1183
		ieee80211_queue_work(&sdata->local->hw,
				     &ifmgd->csa_connection_drop_work);
		goto out;
	}
1184

1185
	/* XXX: shouldn't really modify cfg80211-owned data! */
1186
	ifmgd->associated->channel = sdata->csa_chandef.chan;
1187

1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207
	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);
1208

1209 1210 1211 1212 1213
	if (sdata->csa_block_tx) {
		ieee80211_wake_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
		sdata->csa_block_tx = false;
	}
1214

1215 1216 1217
	sdata->vif.csa_active = false;
	ifmgd->csa_waiting_bcn = false;

1218 1219 1220 1221 1222 1223
	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);
1224
		return;
1225
	}
1226 1227

	cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1228 1229
}

1230 1231
void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
{
J
Johannes Berg 已提交
1232 1233
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1234 1235 1236

	trace_api_chswitch_done(sdata, success);
	if (!success) {
1237 1238 1239 1240 1241 1242
		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);
1243 1244 1245 1246
	}
}
EXPORT_SYMBOL(ieee80211_chswitch_done);

1247
static void ieee80211_chswitch_timer(struct timer_list *t)
1248 1249
{
	struct ieee80211_sub_if_data *sdata =
1250
		from_timer(sdata, t, u.mgd.chswitch_timer);
1251

1252
	ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1253 1254
}

1255
static void
J
Johannes Berg 已提交
1256
ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1257 1258
				 u64 timestamp, u32 device_timestamp,
				 struct ieee802_11_elems *elems,
1259
				 bool beacon)
1260
{
1261
	struct ieee80211_local *local = sdata->local;
1262
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1263
	struct cfg80211_bss *cbss = ifmgd->associated;
1264
	struct ieee80211_chanctx_conf *conf;
J
Johannes Berg 已提交
1265
	struct ieee80211_chanctx *chanctx;
1266
	enum nl80211_band current_band;
1267
	struct ieee80211_csa_ie csa_ie;
1268
	struct ieee80211_channel_switch ch_switch;
1269
	int res;
1270

1271
	sdata_assert_lock(sdata);
1272

1273
	if (!cbss)
1274 1275
		return;

1276
	if (local->scanning)
1277 1278
		return;

1279
	/* disregard subsequent announcements if we are already processing */
1280
	if (sdata->vif.csa_active)
1281 1282
		return;

1283
	current_band = cbss->channel->band;
1284
	res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1285
					   ifmgd->flags,
1286
					   ifmgd->associated->bssid, &csa_ie);
1287
	if (res	< 0)
1288
		ieee80211_queue_work(&local->hw,
1289
				     &ifmgd->csa_connection_drop_work);
1290
	if (res)
1291
		return;
1292

1293
	if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1294 1295 1296
				     IEEE80211_CHAN_DISABLED)) {
		sdata_info(sdata,
			   "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1297
			   ifmgd->associated->bssid,
1298 1299 1300
			   csa_ie.chandef.chan->center_freq,
			   csa_ie.chandef.width, csa_ie.chandef.center_freq1,
			   csa_ie.chandef.center_freq2);
1301 1302 1303 1304 1305
		ieee80211_queue_work(&local->hw,
				     &ifmgd->csa_connection_drop_work);
		return;
	}

1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316
	if (cfg80211_chandef_identical(&csa_ie.chandef,
				       &sdata->vif.bss_conf.chandef)) {
		if (ifmgd->csa_ignored_same_chan)
			return;
		sdata_info(sdata,
			   "AP %pM tries to chanswitch to same channel, ignore\n",
			   ifmgd->associated->bssid);
		ifmgd->csa_ignored_same_chan = true;
		return;
	}

1317 1318 1319 1320 1321 1322 1323 1324
	/*
	 * 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);

1325
	mutex_lock(&local->mtx);
1326
	mutex_lock(&local->chanctx_mtx);
1327 1328 1329 1330 1331
	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");
1332
		goto drop_connection;
1333 1334 1335 1336
	}

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

1337
	if (local->use_chanctx &&
1338
	    !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1339 1340
		sdata_info(sdata,
			   "driver doesn't support chan-switch with channel contexts\n");
1341
		goto drop_connection;
J
Johannes Berg 已提交
1342 1343
	}

1344 1345 1346 1347 1348 1349 1350 1351 1352
	ch_switch.timestamp = timestamp;
	ch_switch.device_timestamp = device_timestamp;
	ch_switch.block_tx = csa_ie.mode;
	ch_switch.chandef = csa_ie.chandef;
	ch_switch.count = csa_ie.count;

	if (drv_pre_channel_switch(sdata, &ch_switch)) {
		sdata_info(sdata,
			   "preparing for channel switch failed, disconnecting\n");
1353
		goto drop_connection;
1354 1355
	}

1356 1357 1358
	res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
					    chanctx->mode, false);
	if (res) {
J
Johannes Berg 已提交
1359
		sdata_info(sdata,
1360 1361
			   "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
			   res);
1362
		goto drop_connection;
J
Johannes Berg 已提交
1363
	}
1364
	mutex_unlock(&local->chanctx_mtx);
J
Johannes Berg 已提交
1365

1366
	sdata->vif.csa_active = true;
1367
	sdata->csa_chandef = csa_ie.chandef;
1368
	sdata->csa_block_tx = csa_ie.mode;
1369
	ifmgd->csa_ignored_same_chan = false;
J
Johannes Berg 已提交
1370

1371
	if (sdata->csa_block_tx)
1372 1373
		ieee80211_stop_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
1374
	mutex_unlock(&local->mtx);
1375

1376 1377 1378
	cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
					  csa_ie.count);

1379
	if (local->ops->channel_switch) {
1380
		/* use driver's channel switch callback */
1381
		drv_channel_switch(local, sdata, &ch_switch);
1382 1383 1384 1385
		return;
	}

	/* channel switch handled in software */
1386
	if (csa_ie.count <= 1)
1387
		ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1388
	else
1389
		mod_timer(&ifmgd->chswitch_timer,
1390 1391
			  TU_TO_EXP_TIME((csa_ie.count - 1) *
					 cbss->beacon_interval));
1392 1393
	return;
 drop_connection:
1394 1395 1396 1397 1398 1399 1400 1401 1402 1403
	/*
	 * 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;
	sdata->csa_block_tx = csa_ie.mode;

1404 1405 1406
	ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
	mutex_unlock(&local->chanctx_mtx);
	mutex_unlock(&local->mtx);
1407 1408
}

1409 1410 1411 1412 1413 1414
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)
1415
{
1416 1417
	struct ieee80211_country_ie_triplet *triplet;
	int chan = ieee80211_frequency_to_channel(channel->center_freq);
1418
	int i, chan_increment;
1419
	bool have_chan_pwr = false;
1420

1421 1422
	/* Invalid IE */
	if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1423
		return false;
1424

1425 1426 1427 1428 1429 1430 1431
	triplet = (void *)(country_ie + 3);
	country_ie_len -= 3;

	switch (channel->band) {
	default:
		WARN_ON_ONCE(1);
		/* fall through */
1432 1433
	case NL80211_BAND_2GHZ:
	case NL80211_BAND_60GHZ:
1434 1435
		chan_increment = 1;
		break;
1436
	case NL80211_BAND_5GHZ:
1437 1438
		chan_increment = 4;
		break;
1439
	}
1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450

	/* 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;
1451
				*chan_pwr = triplet->chans.max_power;
1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462
				break;
			}
		}
		if (have_chan_pwr)
			break;

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

1463
	if (have_chan_pwr && pwr_constr_elem)
1464
		*pwr_reduction = *pwr_constr_elem;
1465 1466 1467
	else
		*pwr_reduction = 0;

1468 1469 1470
	return have_chan_pwr;
}

1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484
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];
}

1485 1486 1487 1488
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,
1489 1490
				       const u8 *pwr_constr_ie,
				       const u8 *cisco_dtpc_ie)
1491
{
1492 1493 1494
	bool has_80211h_pwr = false, has_cisco_pwr = false;
	int chan_pwr = 0, pwr_reduction_80211h = 0;
	int pwr_level_cisco, pwr_level_80211h;
1495
	int new_ap_level;
1496
	__le16 capab = mgmt->u.probe_resp.capab_info;
1497

1498 1499 1500
	if (country_ie &&
	    (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
	     capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1501 1502 1503
		has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
			sdata, channel, country_ie, country_ie_len,
			pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1504 1505 1506 1507 1508 1509 1510 1511
		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;
1512
	}
1513

1514
	if (!has_80211h_pwr && !has_cisco_pwr)
1515
		return 0;
1516

1517 1518 1519 1520 1521
	/* 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)) {
1522 1523 1524 1525 1526
		new_ap_level = pwr_level_80211h;

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

1527 1528 1529 1530
		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);
1531
	} else {  /* has_cisco_pwr is always true here. */
1532 1533 1534 1535 1536
		new_ap_level = pwr_level_cisco;

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

1537 1538 1539
		sdata_dbg(sdata,
			  "Limiting TX power to %d dBm as advertised by %pM\n",
			  pwr_level_cisco, sdata->u.mgd.bssid);
1540
	}
1541

1542 1543 1544 1545
	sdata->ap_power_level = new_ap_level;
	if (__ieee80211_recalc_txpower(sdata))
		return BSS_CHANGED_TXPOWER;
	return 0;
1546 1547
}

1548 1549 1550 1551 1552 1553
/* 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
1554 1555 1556 1557
	/*
	 * If we are scanning right now then the parameters will
	 * take effect when scan finishes.
	 */
1558
	if (local->scanning)
J
Johannes Berg 已提交
1559 1560
		return;

1561
	if (conf->dynamic_ps_timeout > 0 &&
1562
	    !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1563 1564 1565
		mod_timer(&local->dynamic_ps_timer, jiffies +
			  msecs_to_jiffies(conf->dynamic_ps_timeout));
	} else {
1566
		if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1567
			ieee80211_send_nullfunc(local, sdata, true);
1568

1569 1570
		if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
		    ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1571 1572 1573 1574
			return;

		conf->flags |= IEEE80211_CONF_PS;
		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591
	}
}

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);
	}
}

1592 1593 1594 1595
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
1596
	bool authorized = false;
1597 1598 1599 1600

	if (!mgd->powersave)
		return false;

1601 1602 1603
	if (mgd->broken_ap)
		return false;

1604 1605 1606
	if (!mgd->associated)
		return false;

1607
	if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1608 1609
		return false;

1610
	if (!mgd->have_beacon)
1611 1612
		return false;

1613 1614 1615
	rcu_read_lock();
	sta = sta_info_get(sdata, mgd->bssid);
	if (sta)
J
Johannes Berg 已提交
1616
		authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1617 1618
	rcu_read_unlock();

J
Johannes Berg 已提交
1619
	return authorized;
1620 1621
}

1622
/* need to hold RTNL or interface lock */
J
Johannes Berg 已提交
1623
void ieee80211_recalc_ps(struct ieee80211_local *local)
1624 1625 1626
{
	struct ieee80211_sub_if_data *sdata, *found = NULL;
	int count = 0;
1627
	int timeout;
1628

1629
	if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1630 1631 1632 1633 1634
		local->ps_sdata = NULL;
		return;
	}

	list_for_each_entry(sdata, &local->interfaces, list) {
1635
		if (!ieee80211_sdata_running(sdata))
1636
			continue;
1637 1638 1639 1640 1641 1642 1643 1644
		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;
		}
1645 1646 1647 1648 1649 1650
		if (sdata->vif.type != NL80211_IFTYPE_STATION)
			continue;
		found = sdata;
		count++;
	}

1651
	if (count == 1 && ieee80211_powersave_allowed(found)) {
J
Johannes Berg 已提交
1652
		u8 dtimper = found->u.mgd.dtim_period;
1653

1654
		timeout = local->dynamic_ps_forced_timeout;
J
Johannes Berg 已提交
1655 1656
		if (timeout < 0)
			timeout = 100;
1657
		local->hw.conf.dynamic_ps_timeout = timeout;
1658

J
Johannes Berg 已提交
1659 1660 1661 1662 1663 1664
		/* 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;
1665
	} else {
1666
		local->ps_sdata = NULL;
1667
	}
1668 1669 1670 1671

	ieee80211_change_ps(local);
}

E
Eliad Peller 已提交
1672 1673 1674 1675 1676 1677 1678 1679 1680 1681
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);
	}
}

1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693
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,
1694
					IEEE80211_MAX_QUEUE_MAP,
1695 1696
					IEEE80211_QUEUE_STOP_REASON_PS,
					false);
1697 1698 1699 1700 1701 1702 1703 1704
}

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;
1705
	struct ieee80211_if_managed *ifmgd;
1706 1707
	unsigned long flags;
	int q;
1708 1709 1710 1711 1712

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

1713 1714
	ifmgd = &sdata->u.mgd;

1715 1716 1717
	if (local->hw.conf.flags & IEEE80211_CONF_PS)
		return;

1718
	if (local->hw.conf.dynamic_ps_timeout > 0) {
1719 1720
		/* don't enter PS if TX frames are pending */
		if (drv_tx_frames_pending(local)) {
1721 1722 1723 1724 1725
			mod_timer(&local->dynamic_ps_timer, jiffies +
				  msecs_to_jiffies(
				  local->hw.conf.dynamic_ps_timeout));
			return;
		}
1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743

		/*
		 * 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);
1744 1745
	}

1746
	if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1747
	    !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1748
		if (drv_tx_frames_pending(local)) {
1749 1750 1751
			mod_timer(&local->dynamic_ps_timer, jiffies +
				  msecs_to_jiffies(
				  local->hw.conf.dynamic_ps_timeout));
1752
		} else {
1753
			ieee80211_send_nullfunc(local, sdata, true);
1754
			/* Flush to get the tx status of nullfunc frame */
1755
			ieee80211_flush_queues(local, sdata, false);
1756
		}
1757 1758
	}

1759 1760
	if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
	      ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1761 1762 1763 1764 1765
	    (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);
	}
1766 1767
}

1768
void ieee80211_dynamic_ps_timer(struct timer_list *t)
1769
{
1770
	struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1771

1772
	ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1773 1774
}

1775 1776
void ieee80211_dfs_cac_timer_work(struct work_struct *work)
{
1777
	struct delayed_work *delayed_work = to_delayed_work(work);
1778 1779 1780
	struct ieee80211_sub_if_data *sdata =
		container_of(delayed_work, struct ieee80211_sub_if_data,
			     dfs_cac_timer_work);
1781
	struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1782

1783 1784 1785 1786 1787 1788 1789 1790
	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);
1791 1792
}

1793 1794 1795 1796 1797
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;
1798
	bool ret = false;
1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842
	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;
1843 1844 1845 1846 1847 1848
			/* 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.
1849
			 */
1850 1851
			if (non_acm_ac >= IEEE80211_NUM_ACS)
				non_acm_ac = IEEE80211_AC_BK;
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 1884 1885
			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
1886
/* MLME */
L
Luca Coelho 已提交
1887 1888 1889 1890 1891
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)
1892
{
1893
	struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1894
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1895
	size_t left;
1896
	int count, mu_edca_count, ac;
J
Johannes Berg 已提交
1897 1898
	const u8 *pos;
	u8 uapsd_queues = 0;
1899

1900
	if (!local->ops->conf_tx)
1901
		return false;
1902

J
Johannes Berg 已提交
1903
	if (local->hw.queues < IEEE80211_NUM_ACS)
1904
		return false;
1905 1906

	if (!wmm_param)
1907
		return false;
1908

1909
	if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1910
		return false;
K
Kalle Valo 已提交
1911 1912

	if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1913
		uapsd_queues = ifmgd->uapsd_queues;
K
Kalle Valo 已提交
1914

1915
	count = wmm_param[6] & 0x0f;
1916 1917 1918 1919 1920 1921 1922
	/* -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)
1923
		return false;
1924
	ifmgd->wmm_last_param_set = count;
1925
	ifmgd->mu_edca_last_param_set = mu_edca_count;
1926 1927 1928 1929 1930 1931

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

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

Y
Yoni Divinsky 已提交
1932
	sdata->wmm_acm = 0;
1933 1934 1935
	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
1936
		bool uapsd = false;
1937 1938

		switch (aci) {
1939
		case 1: /* AC_BK */
1940
			ac = IEEE80211_AC_BK;
J
Johannes Berg 已提交
1941
			if (acm)
Y
Yoni Divinsky 已提交
1942
				sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
K
Kalle Valo 已提交
1943 1944
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
				uapsd = true;
L
Luca Coelho 已提交
1945 1946 1947
			params[ac].mu_edca = !!mu_edca;
			if (mu_edca)
				params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1948
			break;
1949
		case 2: /* AC_VI */
1950
			ac = IEEE80211_AC_VI;
J
Johannes Berg 已提交
1951
			if (acm)
Y
Yoni Divinsky 已提交
1952
				sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
K
Kalle Valo 已提交
1953 1954
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
				uapsd = true;
L
Luca Coelho 已提交
1955 1956 1957
			params[ac].mu_edca = !!mu_edca;
			if (mu_edca)
				params[ac].mu_edca_param_rec = mu_edca->ac_vi;
1958
			break;
1959
		case 3: /* AC_VO */
1960
			ac = IEEE80211_AC_VO;
J
Johannes Berg 已提交
1961
			if (acm)
Y
Yoni Divinsky 已提交
1962
				sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
K
Kalle Valo 已提交
1963 1964
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
				uapsd = true;
L
Luca Coelho 已提交
1965 1966 1967
			params[ac].mu_edca = !!mu_edca;
			if (mu_edca)
				params[ac].mu_edca_param_rec = mu_edca->ac_vo;
1968
			break;
1969
		case 0: /* AC_BE */
1970
		default:
1971
			ac = IEEE80211_AC_BE;
J
Johannes Berg 已提交
1972
			if (acm)
Y
Yoni Divinsky 已提交
1973
				sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
K
Kalle Valo 已提交
1974 1975
			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
				uapsd = true;
L
Luca Coelho 已提交
1976 1977 1978
			params[ac].mu_edca = !!mu_edca;
			if (mu_edca)
				params[ac].mu_edca_param_rec = mu_edca->ac_be;
1979 1980 1981
			break;
		}

1982
		params[ac].aifs = pos[0] & 0x0f;
1983

1984
		if (params[ac].aifs < 2) {
1985 1986
			sdata_info(sdata,
				   "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1987 1988
				   params[ac].aifs, aci);
			params[ac].aifs = 2;
1989
		}
1990 1991 1992 1993 1994
		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
1995

1996
		if (params[ac].cw_min == 0 ||
1997
		    params[ac].cw_min > params[ac].cw_max) {
1998 1999 2000 2001 2002
			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;
		}
2003
		ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2004 2005 2006
	}

	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
J
Johannes Berg 已提交
2007
		mlme_dbg(sdata,
2008 2009 2010 2011 2012 2013 2014 2015
			 "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
2016
			sdata_err(sdata,
2017 2018
				  "failed to set TX queue parameters for AC %d\n",
				  ac);
2019
	}
2020 2021

	/* enable WMM or activate new settings */
2022
	sdata->vif.bss_conf.qos = true;
2023
	return true;
2024 2025
}

2026 2027 2028 2029
static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
{
	lockdep_assert_held(&sdata->local->mtx);

2030
	sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2031 2032 2033 2034 2035 2036 2037 2038 2039 2040
	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
2041 2042
static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
					   u16 capab, bool erp_valid, u8 erp)
2043
{
J
Johannes Berg 已提交
2044
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2045
	struct ieee80211_supported_band *sband;
2046
	u32 changed = 0;
J
Johannes Berg 已提交
2047 2048 2049 2050
	bool use_protection;
	bool use_short_preamble;
	bool use_short_slot;

2051 2052 2053 2054
	sband = ieee80211_get_sband(sdata);
	if (!sband)
		return changed;

J
Johannes Berg 已提交
2055 2056 2057 2058 2059 2060 2061 2062 2063
	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);
2064
	if (sband->band == NL80211_BAND_5GHZ)
2065
		use_short_slot = true;
2066

2067 2068 2069
	if (use_protection != bss_conf->use_cts_prot) {
		bss_conf->use_cts_prot = use_protection;
		changed |= BSS_CHANGED_ERP_CTS_PROT;
2070
	}
2071

2072 2073
	if (use_short_preamble != bss_conf->use_short_preamble) {
		bss_conf->use_short_preamble = use_short_preamble;
2074
		changed |= BSS_CHANGED_ERP_PREAMBLE;
2075
	}
2076

J
Johannes Berg 已提交
2077 2078 2079
	if (use_short_slot != bss_conf->use_short_slot) {
		bss_conf->use_short_slot = use_short_slot;
		changed |= BSS_CHANGED_ERP_SLOT;
2080 2081 2082 2083 2084
	}

	return changed;
}

2085
static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2086
				     struct cfg80211_bss *cbss,
J
Johannes Berg 已提交
2087
				     u32 bss_info_changed)
2088
{
2089
	struct ieee80211_bss *bss = (void *)cbss->priv;
2090
	struct ieee80211_local *local = sdata->local;
2091
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2092

J
Johannes Berg 已提交
2093
	bss_info_changed |= BSS_CHANGED_ASSOC;
2094
	bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2095
		bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2096

2097
	sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2098
		beacon_loss_count * bss_conf->beacon_int));
2099

2100 2101
	sdata->u.mgd.associated = cbss;
	memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2102

2103 2104
	ieee80211_check_rate_mask(sdata);

2105 2106
	sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;

2107 2108
	if (sdata->vif.p2p ||
	    sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2109
		const struct cfg80211_bss_ies *ies;
2110

2111 2112 2113 2114 2115 2116 2117 2118
		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
2119 2120
					(u8 *) &bss_conf->p2p_noa_attr,
					sizeof(bss_conf->p2p_noa_attr));
2121
			if (ret >= 2) {
J
Janusz Dziedzic 已提交
2122 2123
				sdata->u.mgd.p2p_noa_index =
					bss_conf->p2p_noa_attr.index;
2124 2125
				bss_info_changed |= BSS_CHANGED_P2P_PS;
			}
2126
		}
2127
		rcu_read_unlock();
2128 2129
	}

J
Johannes Berg 已提交
2130
	/* just to be sure */
2131
	ieee80211_stop_poll(sdata);
J
Johannes Berg 已提交
2132

2133
	ieee80211_led_assoc(local, 1);
2134

2135
	if (sdata->u.mgd.have_beacon) {
2136 2137 2138 2139 2140 2141 2142
		/*
		 * 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;
2143
		bss_conf->beacon_rate = bss->beacon_rate;
2144
		bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2145
	} else {
2146
		bss_conf->beacon_rate = NULL;
2147
		bss_conf->dtim_period = 0;
2148
	}
2149

2150
	bss_conf->assoc = 1;
2151

2152
	/* Tell the driver to monitor connection quality (if supported) */
2153
	if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2154
	    bss_conf->cqm_rssi_thold)
2155 2156
		bss_info_changed |= BSS_CHANGED_CQM;

2157
	/* Enable ARP filtering */
2158
	if (bss_conf->arp_addr_cnt)
2159 2160
		bss_info_changed |= BSS_CHANGED_ARP_FILTER;

J
Johannes Berg 已提交
2161
	ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2162

J
Johannes Berg 已提交
2163
	mutex_lock(&local->iflist_mtx);
J
Johannes Berg 已提交
2164
	ieee80211_recalc_ps(local);
J
Johannes Berg 已提交
2165
	mutex_unlock(&local->iflist_mtx);
2166

2167
	ieee80211_recalc_smps(sdata);
E
Eliad Peller 已提交
2168 2169
	ieee80211_recalc_ps_vif(sdata);

2170
	netif_carrier_on(sdata->dev);
2171 2172
}

2173
static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2174 2175
				   u16 stype, u16 reason, bool tx,
				   u8 *frame_buf)
2176
{
2177
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2178
	struct ieee80211_local *local = sdata->local;
2179
	u32 changed = 0;
2180

2181
	sdata_assert_lock(sdata);
2182

2183 2184 2185
	if (WARN_ON_ONCE(tx && !frame_buf))
		return;

J
Johannes Berg 已提交
2186 2187 2188
	if (WARN_ON(!ifmgd->associated))
		return;

2189 2190
	ieee80211_stop_poll(sdata);

2191
	ifmgd->associated = NULL;
2192 2193
	netif_carrier_off(sdata->dev);

2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204
	/*
	 * 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
2205 2206 2207
	/* disable per-vif ps */
	ieee80211_recalc_ps_vif(sdata);

2208 2209 2210
	/* make sure ongoing transmission finishes */
	synchronize_net();

2211 2212 2213 2214 2215 2216
	/*
	 * 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.
	 */
2217
	if (tx)
2218
		ieee80211_flush_queues(local, sdata, true);
2219

2220
	/* deauthenticate/disassociate now */
2221 2222 2223 2224 2225 2226 2227 2228 2229
	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)
2230
			drv_mgd_prepare_tx(sdata->local, sdata, 0);
2231

2232 2233
		ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
					       reason, tx, frame_buf);
2234
	}
2235

2236
	/* flush out frame - make sure the deauth was actually sent */
2237
	if (tx)
2238
		ieee80211_flush_queues(local, sdata, false);
2239

2240
	/* clear bssid only after building the needed mgmt frames */
2241
	eth_zero_addr(ifmgd->bssid);
2242

2243
	/* remove AP and TDLS peers */
2244
	sta_info_flush(sdata);
2245 2246

	/* finally reset all BSS / config parameters */
2247 2248 2249
	changed |= ieee80211_reset_erp_info(sdata);

	ieee80211_led_assoc(local, 0);
J
Johannes Berg 已提交
2250 2251
	changed |= BSS_CHANGED_ASSOC;
	sdata->vif.bss_conf.assoc = false;
2252

J
Janusz Dziedzic 已提交
2253 2254 2255
	ifmgd->p2p_noa_index = -1;
	memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
	       sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2256

2257
	/* on the next assoc, re-program HT/VHT parameters */
B
Ben Greear 已提交
2258 2259
	memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
	memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2260 2261
	memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
	memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2262 2263 2264 2265 2266 2267 2268

	/* 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;
2269
	sdata->vif.mu_mimo_owner = false;
2270

2271
	sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2272

2273 2274 2275
	del_timer_sync(&local->dynamic_ps_timer);
	cancel_work_sync(&local->dynamic_ps_enable_work);

2276
	/* Disable ARP filtering */
2277
	if (sdata->vif.bss_conf.arp_addr_cnt)
2278 2279
		changed |= BSS_CHANGED_ARP_FILTER;

2280 2281 2282
	sdata->vif.bss_conf.qos = false;
	changed |= BSS_CHANGED_QOS;

2283 2284
	/* The BSSID (not really interesting) and HT changed */
	changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
J
Johannes Berg 已提交
2285
	ieee80211_bss_info_change_notify(sdata, changed);
2286

2287
	/* disassociated - set to defaults now */
2288
	ieee80211_set_wmm_default(sdata, false, false);
2289

2290 2291 2292 2293
	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);
2294

2295
	sdata->vif.bss_conf.dtim_period = 0;
2296 2297
	sdata->vif.bss_conf.beacon_rate = NULL;

2298
	ifmgd->have_beacon = false;
2299

2300
	ifmgd->flags = 0;
2301
	mutex_lock(&local->mtx);
2302
	ieee80211_vif_release_channel(sdata);
2303 2304

	sdata->vif.csa_active = false;
2305
	ifmgd->csa_waiting_bcn = false;
2306
	ifmgd->csa_ignored_same_chan = false;
2307 2308 2309 2310 2311
	if (sdata->csa_block_tx) {
		ieee80211_wake_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
		sdata->csa_block_tx = false;
	}
2312
	mutex_unlock(&local->mtx);
2313

2314 2315 2316 2317
	/* existing TX TSPEC sessions no longer exist */
	memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
	cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);

2318
	sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2319
}
2320

2321 2322 2323 2324 2325 2326 2327 2328
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
2329 2330
	 * data idle periods for sending the periodic probe request to the
	 * AP we're connected to.
2331
	 */
J
Johannes Berg 已提交
2332 2333 2334
	if (is_multicast_ether_addr(hdr->addr1))
		return;

2335
	ieee80211_sta_reset_conn_monitor(sdata);
2336
}
2337

2338 2339 2340
static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2341
	struct ieee80211_local *local = sdata->local;
2342

2343
	mutex_lock(&local->mtx);
2344 2345
	if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
		goto out;
2346

2347
	__ieee80211_stop_poll(sdata);
2348 2349

	mutex_lock(&local->iflist_mtx);
J
Johannes Berg 已提交
2350
	ieee80211_recalc_ps(local);
2351
	mutex_unlock(&local->iflist_mtx);
2352

2353
	if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2354
		goto out;
2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365

	/*
	 * 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));
2366 2367
out:
	mutex_unlock(&local->mtx);
2368 2369
}

2370 2371 2372 2373 2374
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
2375
	u16 tid = ieee80211_get_tid(hdr);
2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404
	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);
	}
}

2405
void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2406
			     struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2407
{
2408 2409
	ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);

F
Felix Fietkau 已提交
2410
	if (!ieee80211_is_data(hdr->frame_control))
2411 2412 2413 2414
	    return;

	if (ieee80211_is_nullfunc(hdr->frame_control) &&
	    sdata->u.mgd.probe_send_count > 0) {
2415
		if (ack)
2416
			ieee80211_sta_reset_conn_monitor(sdata);
2417 2418
		else
			sdata->u.mgd.nullfunc_failed = true;
2419
		ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2420
		return;
2421
	}
2422 2423 2424

	if (ack)
		ieee80211_sta_reset_conn_monitor(sdata);
2425 2426
}

2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440
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);
}

2441 2442 2443 2444
static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	const u8 *ssid;
2445
	u8 *dst = ifmgd->associated->bssid;
2446
	u8 unicast_limit = max(1, max_probe_tries - 3);
J
Johannes Berg 已提交
2447
	struct sta_info *sta;
2448 2449 2450 2451 2452 2453 2454 2455

	/*
	 * 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;
2456

2457 2458 2459 2460 2461 2462 2463
	/*
	 * 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.
	 */
2464 2465
	ifmgd->probe_send_count++;

J
Johannes Berg 已提交
2466 2467 2468 2469 2470 2471 2472 2473
	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);
	}

2474
	if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2475
		ifmgd->nullfunc_failed = false;
2476
		ieee80211_send_nullfunc(sdata->local, sdata, false);
2477
	} else {
2478 2479
		int ssid_len;

2480
		rcu_read_lock();
2481
		ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2482 2483 2484 2485 2486
		if (WARN_ON_ONCE(ssid == NULL))
			ssid_len = 0;
		else
			ssid_len = ssid[1];

2487 2488 2489
		ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
					      ssid + 2, ssid_len,
					      ifmgd->associated->channel);
2490
		rcu_read_unlock();
2491
	}
2492

2493
	ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2494
	run_again(sdata, ifmgd->probe_timeout);
2495 2496
}

J
Johannes Berg 已提交
2497 2498
static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
				   bool beacon)
2499 2500
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
2501
	bool already = false;
2502

2503
	if (!ieee80211_sdata_running(sdata))
2504 2505
		return;

2506
	sdata_lock(sdata);
2507 2508 2509 2510

	if (!ifmgd->associated)
		goto out;

2511 2512 2513 2514 2515 2516 2517
	mutex_lock(&sdata->local->mtx);

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

2518
	if (beacon) {
J
Johannes Berg 已提交
2519
		mlme_dbg_ratelimited(sdata,
2520 2521
				     "detected beacon loss from AP (missed %d beacons) - probing\n",
				     beacon_loss_count);
J
Johannes Berg 已提交
2522

2523
		ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2524
	}
2525

J
Johannes Berg 已提交
2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536
	/*
	 * 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!
	 */
2537
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
J
Johannes Berg 已提交
2538 2539
		already = true;

E
Eliad Peller 已提交
2540 2541
	ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;

2542 2543
	mutex_unlock(&sdata->local->mtx);

J
Johannes Berg 已提交
2544 2545 2546
	if (already)
		goto out;

2547
	mutex_lock(&sdata->local->iflist_mtx);
J
Johannes Berg 已提交
2548
	ieee80211_recalc_ps(sdata->local);
2549 2550
	mutex_unlock(&sdata->local->iflist_mtx);

2551 2552
	ifmgd->probe_send_count = 0;
	ieee80211_mgd_probe_ap_send(sdata);
2553
 out:
2554
	sdata_unlock(sdata);
2555 2556
}

2557 2558 2559 2560 2561
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;
2562
	struct cfg80211_bss *cbss;
2563 2564
	struct sk_buff *skb;
	const u8 *ssid;
2565
	int ssid_len;
2566 2567 2568 2569

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

2570
	sdata_assert_lock(sdata);
2571

2572 2573 2574 2575 2576 2577 2578
	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
2579 2580
		return NULL;

2581
	rcu_read_lock();
2582
	ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2583 2584 2585 2586 2587
	if (WARN_ON_ONCE(ssid == NULL))
		ssid_len = 0;
	else
		ssid_len = ssid[1];

2588
	skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
J
Johannes Berg 已提交
2589
					(u32) -1, cbss->channel,
2590
					ssid + 2, ssid_len,
2591
					NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2592
	rcu_read_unlock();
2593 2594 2595 2596 2597

	return skb;
}
EXPORT_SYMBOL(ieee80211_ap_probereq_get);

2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615
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);
}

2616
static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2617
{
2618
	struct ieee80211_local *local = sdata->local;
2619
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2620
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2621
	bool tx;
2622

2623
	sdata_lock(sdata);
2624
	if (!ifmgd->associated) {
2625
		sdata_unlock(sdata);
2626 2627 2628
		return;
	}

2629 2630
	tx = !sdata->csa_block_tx;

2631 2632 2633 2634 2635
	/* 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);

2636 2637
	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
			       WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2638
			       tx, frame_buf);
2639
	mutex_lock(&local->mtx);
2640
	sdata->vif.csa_active = false;
2641
	ifmgd->csa_waiting_bcn = false;
2642 2643 2644 2645 2646
	if (sdata->csa_block_tx) {
		ieee80211_wake_vif_queues(local, sdata,
					  IEEE80211_QUEUE_STOP_REASON_CSA);
		sdata->csa_block_tx = false;
	}
2647
	mutex_unlock(&local->mtx);
2648

2649
	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2650 2651
				    WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);

2652
	sdata_unlock(sdata);
2653 2654
}

2655
static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
J
Johannes Berg 已提交
2656 2657 2658
{
	struct ieee80211_sub_if_data *sdata =
		container_of(work, struct ieee80211_sub_if_data,
2659
			     u.mgd.beacon_connection_loss_work);
2660 2661
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

2662 2663
	if (ifmgd->associated)
		ifmgd->beacon_loss_count++;
J
Johannes Berg 已提交
2664

2665
	if (ifmgd->connection_loss) {
2666 2667
		sdata_info(sdata, "Connection to AP %pM lost\n",
			   ifmgd->bssid);
2668
		__ieee80211_disconnect(sdata);
2669
	} else {
2670
		ieee80211_mgd_probe_ap(sdata, true);
2671 2672 2673 2674 2675 2676 2677 2678 2679
	}
}

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);

2680
	__ieee80211_disconnect(sdata);
J
Johannes Berg 已提交
2681 2682
}

2683 2684 2685
void ieee80211_beacon_loss(struct ieee80211_vif *vif)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2686
	struct ieee80211_hw *hw = &sdata->local->hw;
2687

J
Johannes Berg 已提交
2688 2689
	trace_api_beacon_loss(sdata);

2690
	sdata->u.mgd.connection_loss = false;
2691
	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2692 2693 2694
}
EXPORT_SYMBOL(ieee80211_beacon_loss);

2695 2696 2697 2698 2699
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
2700 2701
	trace_api_connection_loss(sdata);

2702
	sdata->u.mgd.connection_loss = true;
2703 2704 2705 2706 2707
	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
}
EXPORT_SYMBOL(ieee80211_connection_loss);


J
Johannes Berg 已提交
2708 2709 2710 2711 2712
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;

2713
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
2714 2715

	if (!assoc) {
2716 2717 2718 2719 2720 2721
		/*
		 * 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
2722 2723
		sta_info_destroy_addr(sdata, auth_data->bss->bssid);

2724
		eth_zero_addr(sdata->u.mgd.bssid);
J
Johannes Berg 已提交
2725
		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2726
		sdata->u.mgd.flags = 0;
2727
		mutex_lock(&sdata->local->mtx);
J
Johannes Berg 已提交
2728
		ieee80211_vif_release_channel(sdata);
2729
		mutex_unlock(&sdata->local->mtx);
J
Johannes Berg 已提交
2730 2731
	}

2732
	cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
J
Johannes Berg 已提交
2733 2734 2735 2736
	kfree(auth_data);
	sdata->u.mgd.auth_data = NULL;
}

2737
static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2738
					 bool assoc, bool abandon)
2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755
{
	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;
2756 2757
		sdata->vif.mu_mimo_owner = false;

2758 2759 2760
		mutex_lock(&sdata->local->mtx);
		ieee80211_vif_release_channel(sdata);
		mutex_unlock(&sdata->local->mtx);
2761 2762 2763

		if (abandon)
			cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2764 2765 2766 2767 2768 2769
	}

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

J
Johannes Berg 已提交
2770 2771 2772
static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
				     struct ieee80211_mgmt *mgmt, size_t len)
{
2773
	struct ieee80211_local *local = sdata->local;
J
Johannes Berg 已提交
2774 2775 2776
	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
	u8 *pos;
	struct ieee802_11_elems elems;
2777
	u32 tx_flags = 0;
J
Johannes Berg 已提交
2778 2779

	pos = mgmt->u.auth.variable;
2780 2781
	ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
			       mgmt->bssid, auth_data->bss->bssid);
J
Johannes Berg 已提交
2782 2783 2784
	if (!elems.challenge)
		return;
	auth_data->expected_transaction = 4;
2785
	drv_mgd_prepare_tx(sdata->local, sdata, 0);
2786
	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2787 2788
		tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
			   IEEE80211_TX_INTFL_MLME_CONN_TX;
2789
	ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
J
Johannes Berg 已提交
2790 2791 2792
			    elems.challenge - 2, elems.challenge_len + 2,
			    auth_data->bss->bssid, auth_data->bss->bssid,
			    auth_data->key, auth_data->key_len,
2793
			    auth_data->key_idx, tx_flags);
J
Johannes Berg 已提交
2794 2795
}

2796 2797 2798
static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
				    const u8 *bssid)
{
2799
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2800
	struct sta_info *sta;
2801
	bool result = true;
2802

2803 2804 2805 2806 2807 2808
	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);

2809 2810 2811 2812 2813
	/* 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);
2814 2815
		result = false;
		goto out;
2816 2817 2818
	}
	if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
		sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2819 2820
		result = false;
		goto out;
2821 2822
	}

2823 2824 2825
out:
	mutex_unlock(&sdata->local->sta_mtx);
	return result;
2826 2827
}

2828 2829
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
2830 2831 2832 2833
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	u8 bssid[ETH_ALEN];
	u16 auth_alg, auth_transaction, status_code;
2834 2835 2836 2837
	struct ieee80211_event event = {
		.type = MLME_EVENT,
		.u.mlme.data = AUTH_EVENT,
	};
J
Johannes Berg 已提交
2838

2839
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
2840 2841

	if (len < 24 + 6)
2842
		return;
J
Johannes Berg 已提交
2843 2844

	if (!ifmgd->auth_data || ifmgd->auth_data->done)
2845
		return;
J
Johannes Berg 已提交
2846 2847 2848

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

2849
	if (!ether_addr_equal(bssid, mgmt->bssid))
2850
		return;
J
Johannes Berg 已提交
2851 2852 2853 2854 2855 2856

	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 ||
2857 2858 2859 2860 2861
	    (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))) {
2862 2863 2864 2865
		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);
2866
		return;
2867
	}
J
Johannes Berg 已提交
2868 2869

	if (status_code != WLAN_STATUS_SUCCESS) {
J
Johannes Berg 已提交
2870 2871
		sdata_info(sdata, "%pM denied authentication (status %d)\n",
			   mgmt->sa, status_code);
2872
		ieee80211_destroy_auth_data(sdata, false);
2873
		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2874 2875 2876
		event.u.mlme.status = MLME_DENIED;
		event.u.mlme.reason = status_code;
		drv_event_callback(sdata->local, sdata, &event);
2877
		return;
J
Johannes Berg 已提交
2878 2879 2880 2881 2882 2883
	}

	switch (ifmgd->auth_data->algorithm) {
	case WLAN_AUTH_OPEN:
	case WLAN_AUTH_LEAP:
	case WLAN_AUTH_FT:
2884
	case WLAN_AUTH_SAE:
2885 2886 2887
	case WLAN_AUTH_FILS_SK:
	case WLAN_AUTH_FILS_SK_PFS:
	case WLAN_AUTH_FILS_PK:
J
Johannes Berg 已提交
2888 2889 2890 2891 2892
		break;
	case WLAN_AUTH_SHARED_KEY:
		if (ifmgd->auth_data->expected_transaction != 4) {
			ieee80211_auth_challenge(sdata, mgmt, len);
			/* need another frame */
2893
			return;
J
Johannes Berg 已提交
2894 2895 2896 2897 2898
		}
		break;
	default:
		WARN_ONCE(1, "invalid auth alg %d",
			  ifmgd->auth_data->algorithm);
2899
		return;
J
Johannes Berg 已提交
2900 2901
	}

2902 2903
	event.u.mlme.status = MLME_SUCCESS;
	drv_event_callback(sdata->local, sdata, &event);
2904 2905 2906 2907 2908 2909 2910 2911 2912
	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;
2913 2914
	}

2915
	cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2916
	return;
J
Johannes Berg 已提交
2917 2918 2919 2920 2921
 out_err:
	mutex_unlock(&sdata->local->sta_mtx);
	/* ignore frame -- wait for timeout */
}

2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977
#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
2978

2979 2980
static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
				     struct ieee80211_mgmt *mgmt, size_t len)
2981
{
2982
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2983
	u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2984

2985
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
2986

2987
	if (len < 24 + 2)
2988
		return;
2989

2990 2991 2992
	if (ifmgd->associated &&
	    ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
		const u8 *bssid = ifmgd->associated->bssid;
2993

2994 2995 2996
		sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
			   bssid, reason_code,
			   ieee80211_get_reason_code_string(reason_code));
2997

2998
		ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2999

3000 3001 3002 3003
		ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
					    reason_code);
		return;
	}
3004

3005 3006 3007
	if (ifmgd->assoc_data &&
	    ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
		const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3008

3009 3010 3011 3012 3013
		sdata_info(sdata,
			   "deauthenticated from %pM while associating (Reason: %u=%s)\n",
			   bssid, reason_code,
			   ieee80211_get_reason_code_string(reason_code));

3014
		ieee80211_destroy_assoc_data(sdata, false, true);
3015 3016 3017 3018

		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
		return;
	}
3019 3020 3021
}


3022 3023
static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
				       struct ieee80211_mgmt *mgmt, size_t len)
3024
{
3025
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3026 3027
	u16 reason_code;

3028
	sdata_assert_lock(sdata);
3029

J
Johannes Berg 已提交
3030
	if (len < 24 + 2)
3031
		return;
3032

J
Johannes Berg 已提交
3033
	if (!ifmgd->associated ||
3034
	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3035
		return;
3036 3037 3038

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

3039 3040 3041
	sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
		   mgmt->sa, reason_code,
		   ieee80211_get_reason_code_string(reason_code));
3042

3043 3044
	ieee80211_set_disassoc(sdata, 0, 0, false, NULL);

3045
	ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3046 3047
}

3048 3049 3050 3051
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,
3052
				int *min_rate, int *min_rate_index,
3053
				int shift)
3054 3055 3056 3057
{
	int i, j;

	for (i = 0; i < supp_rates_len; i++) {
3058
		int rate = supp_rates[i] & 0x7f;
3059 3060
		bool is_basic = !!(supp_rates[i] & 0x80);

3061
		if ((rate * 5 * (1 << shift)) > 110)
3062 3063 3064
			*have_higher_than_11mbit = true;

		/*
3065 3066
		 * Skip HT and VHT BSS membership selectors since they're not
		 * rates.
3067
		 *
3068
		 * Note: Even though the membership selector and the basic
3069 3070 3071
		 *	 rate flag share the same bit, they are not exactly
		 *	 the same.
		 */
3072 3073
		if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
		    supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3074 3075 3076
			continue;

		for (j = 0; j < sband->n_bitrates; j++) {
3077 3078 3079 3080 3081 3082 3083
			struct ieee80211_rate *br;
			int brate;

			br = &sband->bitrates[j];

			brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
			if (brate == rate) {
3084 3085 3086
				*rates |= BIT(j);
				if (is_basic)
					*basic_rates |= BIT(j);
3087 3088
				if ((rate * 5) < *min_rate) {
					*min_rate = rate * 5;
3089 3090 3091 3092 3093 3094 3095
					*min_rate_index = j;
				}
				break;
			}
		}
	}
}
3096

3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109
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
3110 3111
static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
				    struct cfg80211_bss *cbss,
J
Johannes Berg 已提交
3112
				    struct ieee80211_mgmt *mgmt, size_t len)
3113
{
3114
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3115
	struct ieee80211_local *local = sdata->local;
3116
	struct ieee80211_supported_band *sband;
3117
	struct sta_info *sta;
J
Johannes Berg 已提交
3118 3119
	u8 *pos;
	u16 capab_info, aid;
3120
	struct ieee802_11_elems elems;
J
Johannes Berg 已提交
3121
	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3122 3123
	const struct cfg80211_bss_ies *bss_ies = NULL;
	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
J
Johannes Berg 已提交
3124
	u32 changed = 0;
3125
	int err;
3126
	bool ret;
3127

J
Johannes Berg 已提交
3128
	/* AssocResp and ReassocResp have identical structure */
3129 3130

	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
J
Johannes Berg 已提交
3131
	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3132

3133 3134 3135 3136 3137
	/*
	 * The 5 MSB of the AID field are reserved
	 * (802.11-2016 9.4.1.8 AID field)
	 */
	aid &= 0x7ff;
3138

3139 3140 3141
	ifmgd->broken_ap = false;

	if (aid == 0 || aid > IEEE80211_MAX_AID) {
J
Johannes Berg 已提交
3142 3143
		sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
			   aid);
3144 3145 3146 3147
		aid = 0;
		ifmgd->broken_ap = true;
	}

J
Johannes Berg 已提交
3148
	pos = mgmt->u.assoc_resp.variable;
3149 3150
	ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
			       mgmt->bssid, assoc_data->bss->bssid);
J
Johannes Berg 已提交
3151

3152
	if (!elems.supp_rates) {
J
Johannes Berg 已提交
3153
		sdata_info(sdata, "no SuppRates element in AssocResp\n");
J
Johannes Berg 已提交
3154
		return false;
3155 3156
	}

3157
	ifmgd->aid = aid;
3158 3159 3160
	ifmgd->tdls_chan_switch_prohibited =
		elems.ext_capab && elems.ext_capab_len >= 5 &&
		(elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3161

3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186
	/*
	 * 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,
3187 3188 3189
				       false, &bss_elems,
				       mgmt->bssid,
				       assoc_data->bss->bssid);
3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 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
		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");
		}
	}

3227 3228 3229 3230 3231 3232 3233
	/*
	 * 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,
3234 3235 3236
			   "HT AP is missing WMM params or HT capability/operation\n");
		ret = false;
		goto out;
3237 3238 3239 3240 3241
	}

	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
	    (!elems.vht_cap_elem || !elems.vht_operation)) {
		sdata_info(sdata,
3242 3243 3244
			   "VHT AP is missing VHT capability/operation\n");
		ret = false;
		goto out;
3245 3246
	}

3247 3248 3249 3250 3251
	mutex_lock(&sdata->local->sta_mtx);
	/*
	 * station info was already allocated and inserted before
	 * the association and should be available to us
	 */
3252
	sta = sta_info_get(sdata, cbss->bssid);
3253 3254
	if (WARN_ON(!sta)) {
		mutex_unlock(&sdata->local->sta_mtx);
3255 3256
		ret = false;
		goto out;
3257
	}
3258

3259 3260 3261 3262 3263 3264
	sband = ieee80211_get_sband(sdata);
	if (!sband) {
		mutex_unlock(&sdata->local->sta_mtx);
		ret = false;
		goto out;
	}
3265

L
Luca Coelho 已提交
3266 3267 3268 3269 3270 3271 3272 3273 3274
	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;
	}

3275
	/* Set up internal HT/VHT capabilities */
3276
	if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
B
Ben Greear 已提交
3277
		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3278
						  elems.ht_cap_elem, sta);
3279

M
Mahesh Palivela 已提交
3280 3281
	if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
		ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3282
						    elems.vht_cap_elem, sta);
M
Mahesh Palivela 已提交
3283

L
Luca Coelho 已提交
3284 3285 3286 3287 3288 3289 3290 3291
	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;
3292 3293
		bss_conf->twt_requester =
			ieee80211_twt_req_supported(sta, &elems);
L
Luca Coelho 已提交
3294 3295
	} else {
		bss_conf->he_support = false;
3296
		bss_conf->twt_requester = false;
L
Luca Coelho 已提交
3297 3298 3299
	}

	if (bss_conf->he_support) {
3300 3301 3302
		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
3303 3304

		bss_conf->htc_trig_based_pkt_ext =
3305 3306
			le32_get_bits(elems.he_operation->he_oper_params,
			      IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
L
Luca Coelho 已提交
3307
		bss_conf->frame_time_rts_th =
3308 3309
			le32_get_bits(elems.he_operation->he_oper_params,
			      IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
L
Luca Coelho 已提交
3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325

		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
3326 3327 3328 3329 3330 3331 3332 3333
	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;
	}

3334 3335 3336 3337 3338 3339
	/*
	 * 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.
	 */
3340

3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355
	/*
	 * 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;
	}

3356
	rate_control_rate_init(sta);
3357

3358
	if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
J
Johannes Berg 已提交
3359
		set_sta_flag(sta, WLAN_STA_MFP);
3360 3361 3362 3363
		sta->sta.mfp = true;
	} else {
		sta->sta.mfp = false;
	}
3364

3365
	sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3366

3367
	err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3368 3369 3370
	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
3371 3372 3373
		sdata_info(sdata,
			   "failed to move station %pM to desired state\n",
			   sta->sta.addr);
3374 3375
		WARN_ON(__sta_info_destroy(sta));
		mutex_unlock(&sdata->local->sta_mtx);
3376 3377
		ret = false;
		goto out;
3378 3379
	}

3380
	mutex_unlock(&sdata->local->sta_mtx);
3381

3382 3383 3384 3385 3386 3387 3388
	/*
	 * 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;
3389
	ifmgd->mu_edca_last_param_set = -1;
3390

3391
	if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3392
		ieee80211_set_wmm_default(sdata, false, false);
3393
	} else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
L
Luca Coelho 已提交
3394 3395
					     elems.wmm_param_len,
					     elems.mu_edca_param_set)) {
3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406
		/* 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;
	}
3407
	changed |= BSS_CHANGED_QOS;
3408

3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420
	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
3421 3422 3423 3424
	/* set AID and assoc capability,
	 * ieee80211_set_associated() will tell the driver */
	bss_conf->aid = aid;
	bss_conf->assoc_capability = capab_info;
3425
	ieee80211_set_associated(sdata, cbss, changed);
3426

3427 3428 3429 3430 3431 3432 3433
	/*
	 * 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);

3434
	/*
J
Johannes Berg 已提交
3435 3436
	 * Start timer to probe the connection to the AP now.
	 * Also start the timer that will detect beacon loss.
3437
	 */
J
Johannes Berg 已提交
3438
	ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3439
	ieee80211_sta_reset_beacon_monitor(sdata);
3440

3441 3442 3443 3444
	ret = true;
 out:
	kfree(bss_ies);
	return ret;
3445 3446
}

3447 3448 3449
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
3450 3451 3452 3453 3454
{
	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;
3455
	int ac, uapsd_queues = -1;
J
Johannes Berg 已提交
3456 3457
	u8 *pos;
	bool reassoc;
3458
	struct cfg80211_bss *bss;
3459 3460 3461 3462
	struct ieee80211_event event = {
		.type = MLME_EVENT,
		.u.mlme.data = ASSOC_EVENT,
	};
J
Johannes Berg 已提交
3463

3464
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
3465 3466

	if (!assoc_data)
3467
		return;
3468
	if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3469
		return;
J
Johannes Berg 已提交
3470 3471 3472 3473 3474 3475 3476

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

	if (len < 24 + 6)
3477
		return;
J
Johannes Berg 已提交
3478

3479
	reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
J
Johannes Berg 已提交
3480 3481 3482 3483
	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
3484 3485 3486 3487
	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
3488

3489 3490 3491 3492
	if (assoc_data->fils_kek_len &&
	    fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
		return;

J
Johannes Berg 已提交
3493
	pos = mgmt->u.assoc_resp.variable;
3494 3495
	ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
			       mgmt->bssid, assoc_data->bss->bssid);
J
Johannes Berg 已提交
3496 3497

	if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3498 3499
	    elems.timeout_int &&
	    elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
J
Johannes Berg 已提交
3500
		u32 tu, ms;
3501
		tu = le32_to_cpu(elems.timeout_int->value);
J
Johannes Berg 已提交
3502
		ms = tu * 1024 / 1000;
J
Johannes Berg 已提交
3503 3504 3505
		sdata_info(sdata,
			   "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
			   mgmt->sa, tu, ms);
J
Johannes Berg 已提交
3506
		assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3507
		assoc_data->timeout_started = true;
J
Johannes Berg 已提交
3508
		if (ms > IEEE80211_ASSOC_TIMEOUT)
3509 3510
			run_again(sdata, assoc_data->timeout);
		return;
J
Johannes Berg 已提交
3511 3512
	}

3513
	bss = assoc_data->bss;
J
Johannes Berg 已提交
3514 3515

	if (status_code != WLAN_STATUS_SUCCESS) {
J
Johannes Berg 已提交
3516 3517
		sdata_info(sdata, "%pM denied association (code=%d)\n",
			   mgmt->sa, status_code);
3518
		ieee80211_destroy_assoc_data(sdata, false, false);
3519 3520 3521
		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
3522
	} else {
3523
		if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
J
Johannes Berg 已提交
3524
			/* oops -- internal error -- send timeout for now */
3525
			ieee80211_destroy_assoc_data(sdata, false, false);
3526
			cfg80211_assoc_timeout(sdata->dev, bss);
3527
			return;
J
Johannes Berg 已提交
3528
		}
3529 3530
		event.u.mlme.status = MLME_SUCCESS;
		drv_event_callback(sdata->local, sdata, &event);
3531
		sdata_info(sdata, "associated\n");
3532 3533 3534 3535 3536 3537

		/*
		 * 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
		 */
3538
		ieee80211_destroy_assoc_data(sdata, true, false);
3539 3540 3541 3542 3543

		/* get uapsd queues configuration */
		uapsd_queues = 0;
		for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
			if (sdata->tx_conf[ac].uapsd)
3544
				uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
J
Johannes Berg 已提交
3545 3546
	}

3547
	cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
J
Johannes Berg 已提交
3548
}
J
Johannes Berg 已提交
3549

3550
static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
J
Johannes Berg 已提交
3551
				  struct ieee80211_mgmt *mgmt, size_t len,
3552
				  struct ieee80211_rx_status *rx_status)
3553 3554
{
	struct ieee80211_local *local = sdata->local;
3555
	struct ieee80211_bss *bss;
3556
	struct ieee80211_channel *channel;
3557

3558
	sdata_assert_lock(sdata);
3559

3560 3561
	channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
	if (!channel)
3562 3563
		return;

3564
	bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3565 3566
	if (bss) {
		sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3567
		ieee80211_rx_bss_put(local, bss);
3568
	}
3569 3570 3571
}


3572
static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
J
Johannes Berg 已提交
3573
					 struct sk_buff *skb)
3574
{
J
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3575
	struct ieee80211_mgmt *mgmt = (void *)skb->data;
3576
	struct ieee80211_if_managed *ifmgd;
J
Johannes Berg 已提交
3577 3578
	struct ieee80211_rx_status *rx_status = (void *) skb->cb;
	size_t baselen, len = skb->len;
3579

3580 3581
	ifmgd = &sdata->u.mgd;

3582
	sdata_assert_lock(sdata);
3583

3584
	if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3585 3586
		return; /* ignore ProbeResp to foreign address */

3587 3588 3589 3590
	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
	if (baselen > len)
		return;

3591
	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3592

3593
	if (ifmgd->associated &&
3594
	    ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3595
		ieee80211_reset_ap_probe(sdata);
3596 3597
}

3598 3599 3600
/*
 * This is the canonical list of information elements we care about,
 * the filter code also gives us all changes to the Microsoft OUI
3601 3602 3603
 * (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.
3604 3605 3606 3607 3608 3609 3610 3611 3612 3613
 *
 * 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 =
3614 3615 3616 3617 3618
	(1ULL << WLAN_EID_COUNTRY) |
	(1ULL << WLAN_EID_ERP_INFO) |
	(1ULL << WLAN_EID_CHANNEL_SWITCH) |
	(1ULL << WLAN_EID_PWR_CONSTRAINT) |
	(1ULL << WLAN_EID_HT_CAPABILITY) |
3619 3620
	(1ULL << WLAN_EID_HT_OPERATION) |
	(1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3621

3622 3623 3624 3625 3626
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)
3627
{
3628
	/* Track average RSSI from the Beacon frames of the current AP */
3629

3630 3631
	if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
		ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3632
		ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3633
		ifmgd->last_cqm_event_signal = 0;
3634
		ifmgd->count_beacon_signal = 1;
3635
		ifmgd->last_ave_beacon_signal = 0;
3636
	} else {
3637
		ifmgd->count_beacon_signal++;
3638
	}
3639

3640 3641
	ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);

3642 3643
	if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3644
		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3645
		int last_sig = ifmgd->last_ave_beacon_signal;
3646 3647 3648
		struct ieee80211_event event = {
			.type = RSSI_EVENT,
		};
3649 3650 3651 3652 3653 3654 3655 3656

		/*
		 * 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;
3657 3658
			event.u.rssi.data = RSSI_EVENT_HIGH;
			drv_event_callback(local, sdata, &event);
3659 3660 3661 3662
		} else if (sig < ifmgd->rssi_min_thold &&
			   (last_sig >= ifmgd->rssi_max_thold ||
			   last_sig == 0)) {
			ifmgd->last_ave_beacon_signal = sig;
3663 3664
			event.u.rssi.data = RSSI_EVENT_LOW;
			drv_event_callback(local, sdata, &event);
3665 3666 3667
		}
	}

3668
	if (bss_conf->cqm_rssi_thold &&
3669
	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3670
	    !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3671
		int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3672 3673 3674
		int last_event = ifmgd->last_cqm_event_signal;
		int thold = bss_conf->cqm_rssi_thold;
		int hyst = bss_conf->cqm_rssi_hyst;
3675

3676 3677 3678 3679 3680 3681
		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,
3682
				sig, GFP_KERNEL);
3683 3684 3685 3686 3687 3688
		} 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,
3689
				sig, GFP_KERNEL);
3690 3691 3692
		}
	}

3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715
	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);
		}
	}
3716 3717
}

S
Sara Sharon 已提交
3718 3719 3720 3721 3722 3723 3724 3725 3726 3727
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);
}

3728 3729 3730 3731 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 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768
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
3769
	    ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
3770
		ieee802_11_parse_elems(mgmt->u.beacon.variable,
3771 3772 3773
				       len - baselen, false, &elems,
				       mgmt->bssid,
				       ifmgd->assoc_data->bss->bssid);
3774

3775
		ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
S
Sara Sharon 已提交
3776 3777 3778

		if (elems.dtim_period)
			ifmgd->dtim_period = elems.dtim_period;
3779 3780 3781 3782 3783 3784 3785
		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
3786
			sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3787
		}
S
Sara Sharon 已提交
3788 3789 3790 3791 3792 3793 3794 3795 3796

		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;

3797 3798 3799 3800 3801 3802 3803 3804
		/* 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
3805
	    !ieee80211_rx_our_beacon(mgmt->bssid,  ifmgd->associated))
3806 3807 3808 3809 3810 3811
		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);
3812

3813
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
J
Johannes Berg 已提交
3814
		mlme_dbg_ratelimited(sdata,
3815
				     "cancelling AP probe due to a received beacon\n");
3816
		ieee80211_reset_ap_probe(sdata);
3817 3818
	}

J
Johannes Berg 已提交
3819 3820 3821 3822
	/*
	 * Push the beacon loss detection into the future since
	 * we are processing a beacon from the AP just now.
	 */
3823
	ieee80211_sta_reset_beacon_monitor(sdata);
J
Johannes Berg 已提交
3824

3825 3826
	ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
	ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3827
					  len - baselen, false, &elems,
3828 3829
					  care_about_ies, ncrc,
					  mgmt->bssid, bssid);
3830

3831 3832 3833 3834 3835 3836 3837
	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);
3838
			}
3839
			ieee80211_send_nullfunc(local, sdata, false);
3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851
		} 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);
3852 3853
		}
	}
J
Johannes Berg 已提交
3854

3855 3856
	if (sdata->vif.p2p ||
	    sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
J
Janusz Dziedzic 已提交
3857
		struct ieee80211_p2p_noa_attr noa = {};
3858 3859 3860 3861 3862
		int ret;

		ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
					    len - baselen,
					    IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3863
					    (u8 *) &noa, sizeof(noa));
J
Janusz Dziedzic 已提交
3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879
		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));
3880 3881 3882 3883 3884
			changed |= BSS_CHANGED_P2P_PS;
			ifmgd->beacon_crc_valid = false;
		}
	}

3885 3886 3887
	if (ifmgd->csa_waiting_bcn)
		ieee80211_chswitch_post_beacon(sdata);

3888 3889 3890 3891 3892 3893 3894 3895
	/*
	 * 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.
	 */
3896
	if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3897 3898 3899 3900
		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
3901
		sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3902 3903
	}

3904
	if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3905
		return;
3906
	ifmgd->beacon_crc = ncrc;
3907
	ifmgd->beacon_crc_valid = true;
3908

3909
	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3910

3911
	ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3912
					 rx_status->device_timestamp,
3913 3914
					 &elems, true);

3915 3916
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
	    ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
L
Luca Coelho 已提交
3917 3918
				     elems.wmm_param_len,
				     elems.mu_edca_param_set))
3919 3920
		changed |= BSS_CHANGED_QOS;

3921 3922
	/*
	 * If we haven't had a beacon before, tell the driver about the
3923
	 * DTIM period (and beacon timing if desired) now.
3924
	 */
3925
	if (!ifmgd->have_beacon) {
3926
		/* a few bogus AP send dtim_period = 0 or no TIM IE */
S
Sara Sharon 已提交
3927
		bss_conf->dtim_period = elems.dtim_period ?: 1;
3928

3929 3930
		changed |= BSS_CHANGED_BEACON_INFO;
		ifmgd->have_beacon = true;
3931 3932

		mutex_lock(&local->iflist_mtx);
J
Johannes Berg 已提交
3933
		ieee80211_recalc_ps(local);
3934 3935
		mutex_unlock(&local->iflist_mtx);

3936
		ieee80211_recalc_ps_vif(sdata);
3937 3938
	}

3939
	if (elems.erp_info) {
J
Johannes Berg 已提交
3940 3941 3942 3943
		erp_valid = true;
		erp_value = elems.erp_info[0];
	} else {
		erp_valid = false;
3944
	}
J
Johannes Berg 已提交
3945 3946 3947
	changed |= ieee80211_handle_bss_capability(sdata,
			le16_to_cpu(mgmt->u.beacon.capab_info),
			erp_valid, erp_value);
3948

3949
	mutex_lock(&local->sta_mtx);
3950 3951
	sta = sta_info_get(sdata, bssid);

3952 3953
	if (ieee80211_config_bw(sdata, sta,
				elems.ht_cap_elem, elems.ht_operation,
L
Luca Coelho 已提交
3954 3955
				elems.vht_operation, elems.he_operation,
				bssid, &changed)) {
3956
		mutex_unlock(&local->sta_mtx);
3957 3958 3959
		sdata_info(sdata,
			   "failed to follow AP %pM bandwidth change, disconnect\n",
			   bssid);
3960 3961 3962
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       WLAN_REASON_DEAUTH_LEAVING,
				       true, deauth_buf);
3963 3964 3965
		ieee80211_report_disconnect(sdata, deauth_buf,
					    sizeof(deauth_buf), true,
					    WLAN_REASON_DEAUTH_LEAVING);
3966
		return;
3967
	}
3968 3969 3970

	if (sta && elems.opmode_notif)
		ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3971
					    rx_status->band);
3972
	mutex_unlock(&local->sta_mtx);
3973

3974 3975 3976
	changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
					       elems.country_elem,
					       elems.country_elem_len,
3977 3978
					       elems.pwr_constr_elem,
					       elems.cisco_dtpc_elem);
3979

3980
	ieee80211_bss_info_change_notify(sdata, changed);
3981 3982
}

3983 3984
void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
				  struct sk_buff *skb)
3985 3986 3987 3988
{
	struct ieee80211_rx_status *rx_status;
	struct ieee80211_mgmt *mgmt;
	u16 fc;
3989 3990
	struct ieee802_11_elems elems;
	int ies_len;
3991 3992 3993 3994 3995

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

3996
	sdata_lock(sdata);
3997

J
Johannes Berg 已提交
3998 3999
	switch (fc & IEEE80211_FCTL_STYPE) {
	case IEEE80211_STYPE_BEACON:
4000
		ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
J
Johannes Berg 已提交
4001 4002 4003 4004 4005
		break;
	case IEEE80211_STYPE_PROBE_RESP:
		ieee80211_rx_mgmt_probe_resp(sdata, skb);
		break;
	case IEEE80211_STYPE_AUTH:
4006
		ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
4007 4008
		break;
	case IEEE80211_STYPE_DEAUTH:
4009
		ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
4010 4011
		break;
	case IEEE80211_STYPE_DISASSOC:
4012
		ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
4013 4014 4015
		break;
	case IEEE80211_STYPE_ASSOC_RESP:
	case IEEE80211_STYPE_REASSOC_RESP:
4016
		ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
J
Johannes Berg 已提交
4017 4018
		break;
	case IEEE80211_STYPE_ACTION:
4019
		if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4020 4021 4022
			ies_len = skb->len -
				  offsetof(struct ieee80211_mgmt,
					   u.action.u.chan_switch.variable);
4023 4024 4025 4026

			if (ies_len < 0)
				break;

4027
			/* CSA IE cannot be overridden, no need for BSSID */
4028 4029
			ieee802_11_parse_elems(
				mgmt->u.action.u.chan_switch.variable,
4030
				ies_len, true, &elems, mgmt->bssid, NULL);
4031 4032 4033 4034

			if (elems.parse_error)
				break;

4035
			ieee80211_sta_process_chanswitch(sdata,
4036 4037 4038
						 rx_status->mactime,
						 rx_status->device_timestamp,
						 &elems, false);
4039 4040 4041 4042 4043 4044 4045 4046
		} 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;

4047 4048 4049 4050
			/*
			 * extended CSA IE can't be overridden, no need for
			 * BSSID
			 */
4051 4052
			ieee802_11_parse_elems(
				mgmt->u.action.u.ext_chan_switch.variable,
4053
				ies_len, true, &elems, mgmt->bssid, NULL);
4054 4055 4056 4057 4058 4059 4060 4061

			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
4062
			ieee80211_sta_process_chanswitch(sdata,
4063 4064 4065
						 rx_status->mactime,
						 rx_status->device_timestamp,
						 &elems, false);
4066
		}
4067
		break;
4068
	}
4069
	sdata_unlock(sdata);
4070 4071
}

4072
static void ieee80211_sta_timer(struct timer_list *t)
4073
{
J
Johannes Berg 已提交
4074
	struct ieee80211_sub_if_data *sdata =
4075
		from_timer(sdata, t, u.mgd.timer);
4076

4077
	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4078 4079
}

4080
static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4081
					  u8 *bssid, u8 reason, bool tx)
4082
{
4083
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4084

4085
	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4086
			       tx, frame_buf);
4087

4088 4089
	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
				    reason);
4090 4091
}

4092
static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
J
Johannes Berg 已提交
4093 4094 4095 4096
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4097
	u32 tx_flags = 0;
4098 4099
	u16 trans = 1;
	u16 status = 0;
4100
	u16 prepare_tx_duration = 0;
J
Johannes Berg 已提交
4101

4102
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
4103 4104 4105 4106 4107 4108 4109

	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
4110 4111
		sdata_info(sdata, "authentication with %pM timed out\n",
			   auth_data->bss->bssid);
J
Johannes Berg 已提交
4112 4113 4114 4115 4116 4117 4118 4119 4120 4121

		/*
		 * 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;
	}

4122 4123 4124 4125 4126
	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
4127

4128 4129 4130
	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
4131

4132
	auth_data->expected_transaction = 2;
4133

4134 4135 4136 4137 4138
	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
4139

4140 4141 4142
	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
4143

4144 4145 4146 4147 4148
	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
4149

4150
	if (tx_flags == 0) {
4151 4152 4153 4154 4155
		if (auth_data->algorithm == WLAN_AUTH_SAE)
			auth_data->timeout = jiffies +
				IEEE80211_AUTH_TIMEOUT_SAE;
		else
			auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4156
	} else {
4157 4158
		auth_data->timeout =
			round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4159
	}
J
Johannes Berg 已提交
4160

4161 4162 4163
	auth_data->timeout_started = true;
	run_again(sdata, auth_data->timeout);

J
Johannes Berg 已提交
4164 4165 4166 4167 4168 4169 4170 4171
	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;

4172
	sdata_assert_lock(sdata);
J
Johannes Berg 已提交
4173 4174 4175

	assoc_data->tries++;
	if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
J
Johannes Berg 已提交
4176 4177
		sdata_info(sdata, "association with %pM timed out\n",
			   assoc_data->bss->bssid);
J
Johannes Berg 已提交
4178 4179 4180 4181 4182 4183 4184 4185 4186 4187

		/*
		 * 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
4188 4189 4190
	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
4191 4192
	ieee80211_send_assoc(sdata);

4193
	if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4194
		assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4195
		assoc_data->timeout_started = true;
4196
		run_again(sdata, assoc_data->timeout);
4197
	} else {
4198 4199 4200 4201 4202
		assoc_data->timeout =
			round_jiffies_up(jiffies +
					 IEEE80211_ASSOC_TIMEOUT_LONG);
		assoc_data->timeout_started = true;
		run_again(sdata, assoc_data->timeout);
4203
	}
J
Johannes Berg 已提交
4204 4205 4206 4207

	return 0;
}

4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219
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);
}

4220
void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
J
Johannes Berg 已提交
4221 4222
{
	struct ieee80211_local *local = sdata->local;
4223
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
4224

4225
	sdata_lock(sdata);
4226

4227 4228 4229 4230 4231
	if (ifmgd->status_received) {
		__le16 fc = ifmgd->status_fc;
		bool status_acked = ifmgd->status_acked;

		ifmgd->status_received = false;
4232
		if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4233
			if (status_acked) {
4234 4235 4236 4237 4238 4239 4240 4241 4242
				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;
4243
				run_again(sdata, ifmgd->auth_data->timeout);
4244 4245 4246
			} else {
				ifmgd->auth_data->timeout = jiffies - 1;
			}
4247
			ifmgd->auth_data->timeout_started = true;
4248 4249 4250 4251 4252 4253
		} 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;
4254
				run_again(sdata, ifmgd->assoc_data->timeout);
4255 4256 4257
			} else {
				ifmgd->assoc_data->timeout = jiffies - 1;
			}
4258
			ifmgd->assoc_data->timeout_started = true;
4259 4260 4261
		}
	}

4262
	if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
J
Johannes Berg 已提交
4263 4264 4265 4266 4267 4268 4269
	    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);
4270
		} else if (ieee80211_auth(sdata)) {
J
Johannes Berg 已提交
4271
			u8 bssid[ETH_ALEN];
4272 4273 4274 4275 4276
			struct ieee80211_event event = {
				.type = MLME_EVENT,
				.u.mlme.data = AUTH_EVENT,
				.u.mlme.status = MLME_TIMEOUT,
			};
J
Johannes Berg 已提交
4277 4278 4279 4280 4281

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

			ieee80211_destroy_auth_data(sdata, false);

4282
			cfg80211_auth_timeout(sdata->dev, bssid);
4283
			drv_event_callback(sdata->local, sdata, &event);
J
Johannes Berg 已提交
4284
		}
4285
	} else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4286
		run_again(sdata, ifmgd->auth_data->timeout);
J
Johannes Berg 已提交
4287

4288
	if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
J
Johannes Berg 已提交
4289
	    time_after(jiffies, ifmgd->assoc_data->timeout)) {
4290
		if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
J
Johannes Berg 已提交
4291
		    ieee80211_do_assoc(sdata)) {
4292
			struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4293 4294 4295 4296 4297
			struct ieee80211_event event = {
				.type = MLME_EVENT,
				.u.mlme.data = ASSOC_EVENT,
				.u.mlme.status = MLME_TIMEOUT,
			};
J
Johannes Berg 已提交
4298

4299
			ieee80211_destroy_assoc_data(sdata, false, false);
4300
			cfg80211_assoc_timeout(sdata->dev, bss);
4301
			drv_event_callback(sdata->local, sdata, &event);
J
Johannes Berg 已提交
4302
		}
4303
	} else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4304
		run_again(sdata, ifmgd->assoc_data->timeout);
J
Johannes Berg 已提交
4305

4306
	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
J
Johannes Berg 已提交
4307
	    ifmgd->associated) {
4308
		u8 bssid[ETH_ALEN];
4309
		int max_tries;
4310

4311
		memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4312

4313
		if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4314
			max_tries = max_nullfunc_tries;
4315
		else
4316
			max_tries = max_probe_tries;
4317

4318 4319 4320
		/* ACK received for nullfunc probing frame */
		if (!ifmgd->probe_send_count)
			ieee80211_reset_ap_probe(sdata);
4321 4322
		else if (ifmgd->nullfunc_failed) {
			if (ifmgd->probe_send_count < max_tries) {
J
Johannes Berg 已提交
4323 4324 4325 4326
				mlme_dbg(sdata,
					 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
					 bssid, ifmgd->probe_send_count,
					 max_tries);
4327 4328
				ieee80211_mgd_probe_ap_send(sdata);
			} else {
J
Johannes Berg 已提交
4329 4330 4331
				mlme_dbg(sdata,
					 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
					 bssid);
4332
				ieee80211_sta_connection_lost(sdata, bssid,
4333 4334
					WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
					false);
4335 4336
			}
		} else if (time_is_after_jiffies(ifmgd->probe_timeout))
4337
			run_again(sdata, ifmgd->probe_timeout);
4338
		else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
J
Johannes Berg 已提交
4339 4340 4341
			mlme_dbg(sdata,
				 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
				 bssid, probe_wait_ms);
4342
			ieee80211_sta_connection_lost(sdata, bssid,
4343
				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4344
		} else if (ifmgd->probe_send_count < max_tries) {
J
Johannes Berg 已提交
4345 4346 4347 4348
			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);
4349 4350
			ieee80211_mgd_probe_ap_send(sdata);
		} else {
J
Johannes Berg 已提交
4351 4352 4353 4354
			/*
			 * We actually lost the connection ... or did we?
			 * Let's make sure!
			 */
4355 4356 4357
			mlme_dbg(sdata,
				 "No probe response from AP %pM after %dms, disconnecting.\n",
				 bssid, probe_wait_ms);
4358

4359
			ieee80211_sta_connection_lost(sdata, bssid,
4360
				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
J
Johannes Berg 已提交
4361 4362 4363
		}
	}

4364
	sdata_unlock(sdata);
4365 4366
}

4367
static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
J
Johannes Berg 已提交
4368 4369
{
	struct ieee80211_sub_if_data *sdata =
4370
		from_timer(sdata, t, u.mgd.bcn_mon_timer);
4371
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
4372

4373
	if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
M
Michal Kazior 已提交
4374 4375
		return;

4376
	sdata->u.mgd.connection_loss = false;
4377 4378
	ieee80211_queue_work(&sdata->local->hw,
			     &sdata->u.mgd.beacon_connection_loss_work);
J
Johannes Berg 已提交
4379 4380
}

4381
static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
J
Johannes Berg 已提交
4382 4383
{
	struct ieee80211_sub_if_data *sdata =
4384
		from_timer(sdata, t, u.mgd.conn_mon_timer);
J
Johannes Berg 已提交
4385 4386 4387
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_local *local = sdata->local;

4388
	if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
M
Michal Kazior 已提交
4389 4390
		return;

4391
	ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
J
Johannes Berg 已提交
4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402
}

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
4403 4404
static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
{
4405
	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4406
		__ieee80211_stop_poll(sdata);
4407

J
Johannes Berg 已提交
4408
		/* let's probe the connection once */
4409
		if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4410 4411
			ieee80211_queue_work(&sdata->local->hw,
					     &sdata->u.mgd.monitor_work);
4412
	}
J
Johannes Berg 已提交
4413
}
4414

4415
#ifdef CONFIG_PM
4416 4417 4418 4419 4420 4421 4422
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);

4423 4424 4425 4426 4427
	if (ifmgd->auth_data || ifmgd->assoc_data) {
		const u8 *bssid = ifmgd->auth_data ?
				ifmgd->auth_data->bss->bssid :
				ifmgd->assoc_data->bss->bssid;

4428
		/*
4429 4430 4431
		 * 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.
4432
		 */
4433
		ieee80211_send_deauth_disassoc(sdata, bssid,
4434 4435 4436
					       IEEE80211_STYPE_DEAUTH,
					       WLAN_REASON_DEAUTH_LEAVING,
					       false, frame_buf);
4437
		if (ifmgd->assoc_data)
4438
			ieee80211_destroy_assoc_data(sdata, false, true);
4439 4440
		if (ifmgd->auth_data)
			ieee80211_destroy_auth_data(sdata, false);
4441 4442 4443 4444
		cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
				      IEEE80211_DEAUTH_FRAME_LEN);
	}

4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472
	/* 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);
	}

4473 4474 4475
	sdata_unlock(sdata);
}

4476 4477 4478 4479
void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

4480
	sdata_lock(sdata);
4481
	if (!ifmgd->associated) {
4482
		sdata_unlock(sdata);
4483 4484 4485 4486 4487 4488 4489 4490 4491 4492
		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);
4493
		sdata_unlock(sdata);
4494 4495
		return;
	}
4496
	sdata_unlock(sdata);
4497 4498 4499
}
#endif

J
Johannes Berg 已提交
4500 4501
/* interface setup */
void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4502
{
4503
	struct ieee80211_if_managed *ifmgd;
J
Johannes Berg 已提交
4504

4505
	ifmgd = &sdata->u.mgd;
J
Johannes Berg 已提交
4506
	INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4507
	INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4508 4509
	INIT_WORK(&ifmgd->beacon_connection_loss_work,
		  ieee80211_beacon_connection_loss_work);
4510 4511
	INIT_WORK(&ifmgd->csa_connection_drop_work,
		  ieee80211_csa_connection_drop_work);
4512
	INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4513 4514
	INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
			  ieee80211_tdls_peer_del_work);
4515 4516 4517 4518
	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);
4519 4520
	INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
			  ieee80211_sta_handle_tspec_ac_params_wk);
J
Johannes Berg 已提交
4521

4522
	ifmgd->flags = 0;
4523
	ifmgd->powersave = sdata->wdev.ps;
4524 4525
	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
4526
	ifmgd->p2p_noa_index = -1;
J
Johannes Berg 已提交
4527

4528
	if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4529 4530 4531
		ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
	else
		ifmgd->req_smps = IEEE80211_SMPS_OFF;
4532 4533 4534 4535 4536

	/* Setup TDLS data */
	spin_lock_init(&ifmgd->teardown_lock);
	ifmgd->teardown_skb = NULL;
	ifmgd->orig_teardown_skb = NULL;
4537 4538
}

4539 4540
/* scan finished notification */
void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
J
Johannes Berg 已提交
4541
{
4542
	struct ieee80211_sub_if_data *sdata;
J
Johannes Berg 已提交
4543

4544 4545
	/* Restart STA timers */
	rcu_read_lock();
4546 4547 4548 4549
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		if (ieee80211_sdata_running(sdata))
			ieee80211_restart_sta_timer(sdata);
	}
4550 4551
	rcu_read_unlock();
}
J
Johannes Berg 已提交
4552

J
Johannes Berg 已提交
4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564
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;

4565
	ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
J
Johannes Berg 已提交
4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577
	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;

4578
	vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
J
Johannes Berg 已提交
4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596
	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
4597 4598 4599 4600 4601 4602
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);
4603
	u16 ap_min_req_set;
L
Luca Coelho 已提交
4604 4605 4606 4607 4608
	int i;

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

4609 4610
	ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);

L
Luca Coelho 已提交
4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658
	/* 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;
}

4659 4660
static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
				  struct cfg80211_bss *cbss)
4661 4662 4663
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4664
	const struct ieee80211_ht_cap *ht_cap = NULL;
4665
	const struct ieee80211_ht_operation *ht_oper = NULL;
J
Johannes Berg 已提交
4666
	const struct ieee80211_vht_operation *vht_oper = NULL;
L
Luca Coelho 已提交
4667
	const struct ieee80211_he_operation *he_oper = NULL;
4668
	struct ieee80211_supported_band *sband;
4669
	struct cfg80211_chan_def chandef;
J
Johannes Berg 已提交
4670
	int ret;
4671 4672
	u32 i;
	bool have_80mhz;
4673

4674 4675
	sband = local->hw.wiphy->bands[cbss->channel->band];

J
Johannes Berg 已提交
4676 4677 4678 4679
	ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
			  IEEE80211_STA_DISABLE_80P80MHZ |
			  IEEE80211_STA_DISABLE_160MHZ);

4680 4681
	rcu_read_lock();

J
Johannes Berg 已提交
4682 4683
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
	    sband->ht_cap.ht_supported) {
4684
		const u8 *ht_oper_ie, *ht_cap_ie;
4685

4686
		ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4687 4688
		if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
			ht_oper = (void *)(ht_oper_ie + 2);
4689

4690 4691 4692 4693 4694
		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) {
4695 4696 4697
			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
			ht_oper = NULL;
		}
4698 4699
	}

J
Johannes Berg 已提交
4700 4701
	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
	    sband->vht_cap.vht_supported) {
4702
		const u8 *vht_oper_ie, *vht_cap;
J
Johannes Berg 已提交
4703

4704 4705
		vht_oper_ie = ieee80211_bss_get_ie(cbss,
						   WLAN_EID_VHT_OPERATION);
J
Johannes Berg 已提交
4706 4707 4708 4709
		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
4710
			sdata_info(sdata,
J
Johannes Berg 已提交
4711
				   "AP advertised VHT without HT, disabling both\n");
4712 4713
			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4714
		}
4715 4716 4717 4718 4719 4720

		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;
		}
4721 4722
	}

4723 4724 4725 4726
	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
4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738
		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;

4739
		if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
L
Luca Coelho 已提交
4740 4741 4742
			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
	}

4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756
	/* 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
4757 4758
	ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
						     cbss->channel,
L
Luca Coelho 已提交
4759
						     ht_oper, vht_oper, he_oper,
4760
						     &chandef, false);
4761

J
Johannes Berg 已提交
4762 4763
	sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
				      local->rx_chains);
4764

4765 4766
	rcu_read_unlock();

4767 4768 4769
	/* will change later if needed */
	sdata->smps_mode = IEEE80211_SMPS_OFF;

4770
	mutex_lock(&local->mtx);
J
Johannes Berg 已提交
4771 4772 4773 4774 4775 4776 4777
	/*
	 * 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);
4778 4779 4780 4781

	/* don't downgrade for 5 and 10 MHz channels, though. */
	if (chandef.width == NL80211_CHAN_WIDTH_5 ||
	    chandef.width == NL80211_CHAN_WIDTH_10)
4782
		goto out;
4783

4784
	while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4785
		ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4786 4787 4788
		ret = ieee80211_vif_use_channel(sdata, &chandef,
						IEEE80211_CHANCTX_SHARED);
	}
4789 4790
 out:
	mutex_unlock(&local->mtx);
J
Johannes Berg 已提交
4791
	return ret;
4792 4793
}

S
Sara Sharon 已提交
4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827
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;
}

4828
static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4829 4830
				     struct cfg80211_bss *cbss, bool assoc,
				     bool override)
4831 4832 4833 4834 4835
{
	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;
4836
	struct ieee80211_supported_band *sband;
4837
	bool have_sta = false;
4838 4839
	int err;

4840 4841
	sband = local->hw.wiphy->bands[cbss->channel->band];

4842 4843 4844
	if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
		return -EINVAL;

4845 4846 4847 4848
	/* If a reconfig is happening, bail out */
	if (local->in_reconfig)
		return -EBUSY;

4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859
	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;
	}
4860

4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873
	/*
	 * 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
4874
	if (new_sta) {
4875 4876 4877
		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
4878
		const struct cfg80211_bss_ies *ies;
4879
		int shift = ieee80211_vif_get_shift(&sdata->vif);
4880 4881 4882 4883 4884

		ieee80211_get_rates(sband, bss->supp_rates,
				    bss->supp_rates_len,
				    &rates, &basic_rates,
				    &have_higher_than_11mbit,
4885
				    &min_rate, &min_rate_index,
4886
				    shift);
4887 4888 4889 4890 4891 4892 4893 4894 4895 4896

		/*
		 * 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
4897 4898
			sdata_info(sdata,
				   "No basic rates, using min rate instead\n");
4899 4900 4901
			basic_rates = BIT(min_rate_index);
		}

J
Johannes Berg 已提交
4902
		new_sta->sta.supp_rates[cbss->channel->band] = rates;
4903 4904 4905
		sdata->vif.bss_conf.basic_rates = basic_rates;

		/* cf. IEEE 802.11 9.2.12 */
4906
		if (cbss->channel->band == NL80211_BAND_2GHZ &&
4907 4908 4909 4910 4911 4912 4913
		    have_higher_than_11mbit)
			sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
		else
			sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;

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

4914 4915
		/* set timing information */
		sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
J
Johannes Berg 已提交
4916
		rcu_read_lock();
4917 4918 4919 4920 4921
		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
4922 4923 4924 4925

			ieee80211_get_dtim(ies,
					   &sdata->vif.bss_conf.sync_dtim_count,
					   NULL);
4926 4927
		} else if (!ieee80211_hw_check(&sdata->local->hw,
					       TIMING_BEACON_ONLY)) {
4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938
			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
4939
		rcu_read_unlock();
4940
	}
4941

4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955
	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
		 */
4956
		ieee80211_bss_info_change_notify(sdata,
4957 4958
			BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
			BSS_CHANGED_BEACON_INT);
4959 4960

		if (assoc)
J
Johannes Berg 已提交
4961
			sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4962

J
Johannes Berg 已提交
4963 4964
		err = sta_info_insert(new_sta);
		new_sta = NULL;
4965
		if (err) {
J
Johannes Berg 已提交
4966 4967 4968
			sdata_info(sdata,
				   "failed to insert STA entry for the AP (error %d)\n",
				   err);
4969 4970 4971
			return err;
		}
	} else
4972
		WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4973

4974 4975 4976 4977
	/* Cancel scan to ensure that nothing interferes with connection */
	if (local->scanning)
		ieee80211_scan_cancel(local);

4978 4979 4980
	return 0;
}

4981 4982 4983
/* config hooks */
int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
		       struct cfg80211_auth_request *req)
J
Johannes Berg 已提交
4984
{
J
Johannes Berg 已提交
4985 4986 4987
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_mgd_auth_data *auth_data;
4988
	u16 auth_alg;
J
Johannes Berg 已提交
4989
	int err;
4990
	bool cont_auth;
J
Johannes Berg 已提交
4991 4992

	/* prepare auth data structure */
J
Johannes Berg 已提交
4993

4994 4995 4996 4997 4998
	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
4999
		if (IS_ERR(local->wep_tx_tfm))
5000
			return -EOPNOTSUPP;
5001 5002 5003 5004 5005 5006 5007 5008
		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;
5009 5010 5011
	case NL80211_AUTHTYPE_SAE:
		auth_alg = WLAN_AUTH_SAE;
		break;
5012 5013 5014 5015 5016 5017 5018 5019 5020
	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;
5021 5022
	default:
		return -EOPNOTSUPP;
J
Johannes Berg 已提交
5023
	}
5024

5025
	if (ifmgd->assoc_data)
5026 5027
		return -EBUSY;

5028
	auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5029
			    req->ie_len, GFP_KERNEL);
J
Johannes Berg 已提交
5030
	if (!auth_data)
J
Johannes Berg 已提交
5031
		return -ENOMEM;
5032

J
Johannes Berg 已提交
5033
	auth_data->bss = req->bss;
5034

5035
	if (req->auth_data_len >= 4) {
5036 5037 5038 5039 5040 5041
		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]);
		}
5042 5043 5044
		memcpy(auth_data->data, req->auth_data + 4,
		       req->auth_data_len - 4);
		auth_data->data_len += req->auth_data_len - 4;
5045 5046
	}

5047 5048 5049 5050 5051 5052 5053
	/* 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;

5054
	if (req->ie && req->ie_len) {
5055 5056 5057
		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
5058
	}
5059

J
Johannes Berg 已提交
5060
	if (req->key && req->key_len) {
J
Johannes Berg 已提交
5061 5062 5063
		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
5064 5065
	}

J
Johannes Berg 已提交
5066
	auth_data->algorithm = auth_alg;
J
Johannes Berg 已提交
5067

J
Johannes Berg 已提交
5068
	/* try to authenticate/probe */
5069

5070 5071 5072 5073 5074 5075 5076
	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);
	}
5077

J
Johannes Berg 已提交
5078 5079
	/* prep auth_data so we don't go into idle on disassoc */
	ifmgd->auth_data = auth_data;
J
Johannes Berg 已提交
5080

5081 5082 5083 5084 5085 5086 5087 5088 5089
	/* 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);

5090 5091 5092
	if (ifmgd->associated) {
		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];

5093 5094 5095
		sdata_info(sdata,
			   "disconnect from AP %pM for new auth to %pM\n",
			   ifmgd->associated->bssid, req->bss->bssid);
5096 5097 5098 5099
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       WLAN_REASON_UNSPECIFIED,
				       false, frame_buf);

5100 5101 5102
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    WLAN_REASON_UNSPECIFIED);
5103
	}
J
Johannes Berg 已提交
5104

J
Johannes Berg 已提交
5105
	sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5106

5107
	err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5108
	if (err)
J
Johannes Berg 已提交
5109
		goto err_clear;
J
Johannes Berg 已提交
5110

5111
	err = ieee80211_auth(sdata);
J
Johannes Berg 已提交
5112 5113 5114 5115 5116 5117
	if (err) {
		sta_info_destroy_addr(sdata, req->bss->bssid);
		goto err_clear;
	}

	/* hold our own reference */
5118
	cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5119
	return 0;
J
Johannes Berg 已提交
5120 5121

 err_clear:
5122
	eth_zero_addr(ifmgd->bssid);
5123
	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
J
Johannes Berg 已提交
5124
	ifmgd->auth_data = NULL;
5125 5126 5127
	mutex_lock(&sdata->local->mtx);
	ieee80211_vif_release_channel(sdata);
	mutex_unlock(&sdata->local->mtx);
J
Johannes Berg 已提交
5128 5129
	kfree(auth_data);
	return err;
J
Johannes Berg 已提交
5130 5131
}

5132 5133
int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
			struct cfg80211_assoc_request *req)
5134
{
J
Johannes Berg 已提交
5135
	struct ieee80211_local *local = sdata->local;
5136
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5137
	struct ieee80211_bss *bss = (void *)req->bss->priv;
J
Johannes Berg 已提交
5138
	struct ieee80211_mgd_assoc_data *assoc_data;
5139
	const struct cfg80211_bss_ies *beacon_ies;
J
Johannes Berg 已提交
5140
	struct ieee80211_supported_band *sband;
5141
	const u8 *ssidie, *ht_ie, *vht_ie;
5142
	int i, err;
5143
	bool override = false;
5144

J
Johannes Berg 已提交
5145 5146 5147 5148
	assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
	if (!assoc_data)
		return -ENOMEM;

5149 5150 5151 5152 5153 5154 5155 5156 5157 5158 5159
	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();

5160 5161 5162
	if (ifmgd->associated) {
		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];

5163 5164 5165
		sdata_info(sdata,
			   "disconnect from AP %pM for new assoc to %pM\n",
			   ifmgd->associated->bssid, req->bss->bssid);
5166 5167 5168 5169
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       WLAN_REASON_UNSPECIFIED,
				       false, frame_buf);

5170 5171 5172
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    WLAN_REASON_UNSPECIFIED);
5173
	}
J
Johannes Berg 已提交
5174 5175 5176 5177

	if (ifmgd->auth_data && !ifmgd->auth_data->done) {
		err = -EBUSY;
		goto err_free;
J
Johannes Berg 已提交
5178
	}
5179

J
Johannes Berg 已提交
5180 5181 5182 5183
	if (ifmgd->assoc_data) {
		err = -EBUSY;
		goto err_free;
	}
5184

J
Johannes Berg 已提交
5185 5186 5187 5188
	if (ifmgd->auth_data) {
		bool match;

		/* keep sta info, bssid if matching */
5189
		match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
J
Johannes Berg 已提交
5190
		ieee80211_destroy_auth_data(sdata, match);
5191 5192
	}

J
Johannes Berg 已提交
5193
	/* prepare assoc data */
5194

5195 5196
	ifmgd->beacon_crc_valid = false;

5197 5198 5199
	assoc_data->wmm = bss->wmm_used &&
			  (local->hw.queues >= IEEE80211_NUM_ACS);

J
Johannes Berg 已提交
5200 5201 5202 5203 5204 5205 5206
	/*
	 * 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.
	 */
5207
	for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5208 5209
		if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5210
		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5211
			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5212
			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
L
Luca Coelho 已提交
5213
			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5214
			netdev_info(sdata->dev,
L
Luca Coelho 已提交
5215
				    "disabling HE/HT/VHT due to WEP/TKIP use\n");
5216 5217
		}
	}
5218

J
Johannes Berg 已提交
5219 5220 5221
	/* 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 ||
5222 5223
	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
	    ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5224
		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5225 5226
		if (!bss->wmm_used &&
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5227 5228
			netdev_info(sdata->dev,
				    "disabling HT as WMM/QoS is not supported by the AP\n");
5229
	}
J
Johannes Berg 已提交
5230

5231 5232
	/* disable VHT if we don't support it or the AP doesn't use WMM */
	if (!sband->vht_cap.vht_supported ||
5233 5234
	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
	    ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5235
		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5236 5237
		if (!bss->wmm_used &&
		    !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5238 5239
			netdev_info(sdata->dev,
				    "disabling VHT as WMM/QoS is not supported by the AP\n");
5240 5241
	}

B
Ben Greear 已提交
5242 5243 5244 5245
	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));

5246 5247 5248 5249
	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));

5250
	if (req->ie && req->ie_len) {
J
Johannes Berg 已提交
5251 5252 5253
		memcpy(assoc_data->ie, req->ie, req->ie_len);
		assoc_data->ie_len = req->ie_len;
	}
5254

5255 5256 5257 5258 5259 5260 5261 5262 5263 5264 5265 5266 5267 5268 5269
	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
5270
	assoc_data->bss = req->bss;
5271

J
Johannes Berg 已提交
5272 5273
	if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
		if (ifmgd->powersave)
5274
			sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
J
Johannes Berg 已提交
5275
		else
5276
			sdata->smps_mode = IEEE80211_SMPS_OFF;
J
Johannes Berg 已提交
5277
	} else
5278
		sdata->smps_mode = ifmgd->req_smps;
J
Johannes Berg 已提交
5279

J
Johannes Berg 已提交
5280 5281 5282
	assoc_data->capability = req->bss->capability;
	assoc_data->supp_rates = bss->supp_rates;
	assoc_data->supp_rates_len = bss->supp_rates_len;
5283

5284
	rcu_read_lock();
5285 5286 5287 5288 5289
	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
5290
		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5291 5292 5293 5294 5295 5296
	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;
5297
	rcu_read_unlock();
5298

5299
	if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5300
		 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5301 5302 5303
	     "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
		sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;

K
Kalle Valo 已提交
5304
	if (bss->wmm_used && bss->uapsd_supported &&
5305
	    (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5306
		assoc_data->uapsd = true;
K
Kalle Valo 已提交
5307 5308
		ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
	} else {
5309
		assoc_data->uapsd = false;
K
Kalle Valo 已提交
5310 5311 5312
		ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
	}

5313
	if (req->prev_bssid)
J
Johannes Berg 已提交
5314
		memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5315 5316 5317 5318 5319 5320 5321 5322 5323

	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;
	}

5324 5325 5326 5327 5328
	if (req->flags & ASSOC_REQ_USE_RRM)
		ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
	else
		ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;

5329 5330 5331 5332 5333
	if (req->crypto.control_port)
		ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
	else
		ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;

5334 5335
	sdata->control_port_protocol = req->crypto.control_port_ethertype;
	sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5336 5337
	sdata->control_port_over_nl80211 =
					req->crypto.control_port_over_nl80211;
5338 5339
	sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
							sdata->vif.type);
5340

J
Johannes Berg 已提交
5341 5342 5343
	/* kick off associate process */

	ifmgd->assoc_data = assoc_data;
5344
	ifmgd->dtim_period = 0;
5345
	ifmgd->have_beacon = false;
J
Johannes Berg 已提交
5346

5347 5348 5349 5350 5351 5352 5353 5354 5355 5356 5357 5358 5359 5360 5361 5362 5363 5364 5365 5366 5367 5368 5369 5370 5371 5372 5373 5374 5375 5376
	/* 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);
5377 5378
	if (err)
		goto err_clear;
J
Johannes Berg 已提交
5379

5380 5381
	rcu_read_lock();
	beacon_ies = rcu_dereference(req->bss->beacon_ies);
5382

5383
	if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5384 5385 5386 5387 5388 5389 5390 5391
	    !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);
5392
		assoc_data->timeout_started = true;
5393 5394
		assoc_data->need_beacon = true;
	} else if (beacon_ies) {
S
Sara Sharon 已提交
5395
		const u8 *ie;
5396 5397
		u8 dtim_count = 0;

S
Sara Sharon 已提交
5398 5399 5400
		ieee80211_get_dtim(beacon_ies, &dtim_count,
				   &ifmgd->dtim_period);

5401
		ifmgd->have_beacon = true;
J
Johannes Berg 已提交
5402
		assoc_data->timeout = jiffies;
5403
		assoc_data->timeout_started = true;
5404

5405
		if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5406 5407 5408 5409 5410
			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
5411 5412 5413 5414 5415 5416 5417 5418 5419 5420 5421

		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;
5422 5423
	} else {
		assoc_data->timeout = jiffies;
5424
		assoc_data->timeout_started = true;
J
Johannes Berg 已提交
5425
	}
5426 5427
	rcu_read_unlock();

5428
	run_again(sdata, assoc_data->timeout);
J
Johannes Berg 已提交
5429

P
Paul Stewart 已提交
5430 5431 5432 5433 5434 5435 5436 5437 5438 5439
	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
5440 5441
		sdata_info(sdata, "associating with AP with corrupt %s\n",
			   corrupt_type);
P
Paul Stewart 已提交
5442 5443
	}

5444
	return 0;
J
Johannes Berg 已提交
5445
 err_clear:
5446
	eth_zero_addr(ifmgd->bssid);
5447
	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
J
Johannes Berg 已提交
5448 5449 5450 5451
	ifmgd->assoc_data = NULL;
 err_free:
	kfree(assoc_data);
	return err;
5452 5453
}

5454
int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5455
			 struct cfg80211_deauth_request *req)
5456
{
5457
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5458
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5459
	bool tx = !req->local_state_change;
5460

5461 5462 5463 5464 5465 5466
	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));
5467

5468
		drv_mgd_prepare_tx(sdata->local, sdata, 0);
5469 5470
		ieee80211_send_deauth_disassoc(sdata, req->bssid,
					       IEEE80211_STYPE_DEAUTH,
5471
					       req->reason_code, tx,
5472
					       frame_buf);
5473
		ieee80211_destroy_auth_data(sdata, false);
5474 5475 5476
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    req->reason_code);
5477

5478
		return 0;
5479 5480
	}

5481 5482 5483 5484 5485 5486 5487
	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));

5488
		drv_mgd_prepare_tx(sdata->local, sdata, 0);
5489 5490 5491 5492
		ieee80211_send_deauth_disassoc(sdata, req->bssid,
					       IEEE80211_STYPE_DEAUTH,
					       req->reason_code, tx,
					       frame_buf);
5493
		ieee80211_destroy_assoc_data(sdata, false, true);
5494 5495 5496 5497 5498 5499
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    req->reason_code);
		return 0;
	}

5500 5501
	if (ifmgd->associated &&
	    ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5502 5503 5504 5505 5506
		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));

5507 5508
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       req->reason_code, tx, frame_buf);
5509 5510 5511
		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    req->reason_code);
5512 5513
		return 0;
	}
5514

5515
	return -ENOTCONN;
5516
}
5517

5518
int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5519
			   struct cfg80211_disassoc_request *req)
J
Johannes Berg 已提交
5520
{
5521
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5522
	u8 bssid[ETH_ALEN];
5523
	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
J
Johannes Berg 已提交
5524

J
Johannes Berg 已提交
5525 5526 5527 5528 5529 5530
	/*
	 * 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.
	 */
5531
	if (ifmgd->associated != req->bss)
5532 5533
		return -ENOLINK;

J
Johannes Berg 已提交
5534
	sdata_info(sdata,
5535 5536
		   "disassociating from %pM by local choice (Reason: %u=%s)\n",
		   req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5537

5538
	memcpy(bssid, req->bss->bssid, ETH_ALEN);
5539 5540 5541
	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
			       req->reason_code, !req->local_state_change,
			       frame_buf);
5542

5543 5544
	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
				    req->reason_code);
5545

5546 5547
	return 0;
}
5548

5549
void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5550 5551 5552
{
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

5553 5554 5555 5556 5557 5558 5559 5560 5561 5562
	/*
	 * 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);
5563
	cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5564

5565
	sdata_lock(sdata);
5566 5567
	if (ifmgd->assoc_data) {
		struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5568
		ieee80211_destroy_assoc_data(sdata, false, false);
5569 5570
		cfg80211_assoc_timeout(sdata->dev, bss);
	}
5571 5572
	if (ifmgd->auth_data)
		ieee80211_destroy_auth_data(sdata, false);
5573 5574 5575 5576 5577 5578 5579
	spin_lock_bh(&ifmgd->teardown_lock);
	if (ifmgd->teardown_skb) {
		kfree_skb(ifmgd->teardown_skb);
		ifmgd->teardown_skb = NULL;
		ifmgd->orig_teardown_skb = NULL;
	}
	spin_unlock_bh(&ifmgd->teardown_lock);
5580
	del_timer_sync(&ifmgd->timer);
5581
	sdata_unlock(sdata);
5582 5583
}

5584 5585
void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
			       enum nl80211_cqm_rssi_threshold_event rssi_event,
5586
			       s32 rssi_level,
5587 5588 5589 5590
			       gfp_t gfp)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

5591
	trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
J
Johannes Berg 已提交
5592

5593
	cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5594 5595
}
EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5596 5597 5598 5599 5600 5601 5602 5603 5604 5605

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);