util.c 49.3 KB
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/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005-2006, Devicescape Software, Inc.
 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
 *
 * 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.
 *
 * utilities for mac80211
 */

#include <net/mac80211.h>
#include <linux/netdevice.h>
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#include <linux/export.h>
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#include <linux/types.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/bitmap.h>
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#include <linux/crc32.h>
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#include <net/net_namespace.h>
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#include <net/cfg80211.h>
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#include <net/rtnetlink.h>
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#include "ieee80211_i.h"
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#include "driver-ops.h"
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#include "rate.h"
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#include "mesh.h"
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#include "wme.h"
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#include "led.h"
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#include "wep.h"
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/* privid for wiphys to determine whether they belong to us or not */
void *mac80211_wiphy_privid = &mac80211_wiphy_privid;

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struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
{
	struct ieee80211_local *local;
	BUG_ON(!wiphy);

	local = wiphy_priv(wiphy);
	return &local->hw;
}
EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
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u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
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			enum nl80211_iftype type)
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{
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	__le16 fc = hdr->frame_control;
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	 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
	if (len < 16)
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		return NULL;

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	if (ieee80211_is_data(fc)) {
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		if (len < 24) /* drop incorrect hdr len (data) */
			return NULL;
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		if (ieee80211_has_a4(fc))
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			return NULL;
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		if (ieee80211_has_tods(fc))
			return hdr->addr1;
		if (ieee80211_has_fromds(fc))
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			return hdr->addr2;
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		return hdr->addr3;
	}

	if (ieee80211_is_mgmt(fc)) {
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		if (len < 24) /* drop incorrect hdr len (mgmt) */
			return NULL;
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		return hdr->addr3;
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	}

	if (ieee80211_is_ctl(fc)) {
		if(ieee80211_is_pspoll(fc))
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			return hdr->addr1;
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		if (ieee80211_is_back_req(fc)) {
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			switch (type) {
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			case NL80211_IFTYPE_STATION:
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				return hdr->addr2;
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			case NL80211_IFTYPE_AP:
			case NL80211_IFTYPE_AP_VLAN:
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				return hdr->addr1;
			default:
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				break; /* fall through to the return */
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			}
		}
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	}

	return NULL;
}

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void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
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{
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	struct sk_buff *skb;
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	struct ieee80211_hdr *hdr;

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	skb_queue_walk(&tx->skbs, skb) {
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		hdr = (struct ieee80211_hdr *) skb->data;
		hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
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	}
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}

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int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
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			     int rate, int erp, int short_preamble)
{
	int dur;

	/* calculate duration (in microseconds, rounded up to next higher
	 * integer if it includes a fractional microsecond) to send frame of
	 * len bytes (does not include FCS) at the given rate. Duration will
	 * also include SIFS.
	 *
	 * rate is in 100 kbps, so divident is multiplied by 10 in the
	 * DIV_ROUND_UP() operations.
	 */

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	if (band == IEEE80211_BAND_5GHZ || erp) {
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		/*
		 * OFDM:
		 *
		 * N_DBPS = DATARATE x 4
		 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
		 *	(16 = SIGNAL time, 6 = tail bits)
		 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
		 *
		 * T_SYM = 4 usec
		 * 802.11a - 17.5.2: aSIFSTime = 16 usec
		 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
		 *	signal ext = 6 usec
		 */
		dur = 16; /* SIFS + signal ext */
		dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
		dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
		dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
					4 * rate); /* T_SYM x N_SYM */
	} else {
		/*
		 * 802.11b or 802.11g with 802.11b compatibility:
		 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
		 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
		 *
		 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
		 * aSIFSTime = 10 usec
		 * aPreambleLength = 144 usec or 72 usec with short preamble
		 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
		 */
		dur = 10; /* aSIFSTime = 10 usec */
		dur += short_preamble ? (72 + 24) : (144 + 48);

		dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
	}

	return dur;
}

/* Exported duration function for driver use */
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__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
					struct ieee80211_vif *vif,
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					enum ieee80211_band band,
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					size_t frame_len,
					struct ieee80211_rate *rate)
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{
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	struct ieee80211_sub_if_data *sdata;
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	u16 dur;
	int erp;
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	bool short_preamble = false;
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	erp = 0;
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	if (vif) {
		sdata = vif_to_sdata(vif);
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		short_preamble = sdata->vif.bss_conf.use_short_preamble;
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		if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
			erp = rate->flags & IEEE80211_RATE_ERP_G;
	}
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	dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
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				       short_preamble);
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	return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_generic_frame_duration);

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__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
			      struct ieee80211_vif *vif, size_t frame_len,
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			      const struct ieee80211_tx_info *frame_txctl)
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{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_rate *rate;
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	struct ieee80211_sub_if_data *sdata;
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	bool short_preamble;
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	int erp;
	u16 dur;
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	struct ieee80211_supported_band *sband;

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	sband = local->hw.wiphy->bands[frame_txctl->band];
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	short_preamble = false;
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	rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
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	erp = 0;
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	if (vif) {
		sdata = vif_to_sdata(vif);
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		short_preamble = sdata->vif.bss_conf.use_short_preamble;
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		if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
			erp = rate->flags & IEEE80211_RATE_ERP_G;
	}
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	/* CTS duration */
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	dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate,
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				       erp, short_preamble);
	/* Data frame duration */
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	dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
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					erp, short_preamble);
	/* ACK duration */
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	dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
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					erp, short_preamble);

	return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_rts_duration);

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__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
				    struct ieee80211_vif *vif,
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				    size_t frame_len,
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				    const struct ieee80211_tx_info *frame_txctl)
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{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_rate *rate;
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	struct ieee80211_sub_if_data *sdata;
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	bool short_preamble;
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	int erp;
	u16 dur;
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	struct ieee80211_supported_band *sband;

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	sband = local->hw.wiphy->bands[frame_txctl->band];
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	short_preamble = false;
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	rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
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	erp = 0;
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	if (vif) {
		sdata = vif_to_sdata(vif);
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		short_preamble = sdata->vif.bss_conf.use_short_preamble;
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		if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
			erp = rate->flags & IEEE80211_RATE_ERP_G;
	}
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	/* Data frame duration */
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	dur = ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
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				       erp, short_preamble);
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	if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
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		/* ACK duration */
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		dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
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						erp, short_preamble);
	}

	return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_ctstoself_duration);

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void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
{
	struct ieee80211_sub_if_data *sdata;
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	int n_acs = IEEE80211_NUM_ACS;

	if (local->hw.queues < IEEE80211_NUM_ACS)
		n_acs = 1;
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	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		int ac;

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		if (!sdata->dev)
			continue;

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		if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
			continue;

		if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
		    local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
			continue;

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		for (ac = 0; ac < n_acs; ac++) {
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			int ac_queue = sdata->vif.hw_queue[ac];

			if (ac_queue == queue ||
			    (sdata->vif.cab_queue == queue &&
			     local->queue_stop_reasons[ac_queue] == 0 &&
			     skb_queue_empty(&local->pending[ac_queue])))
				netif_wake_subqueue(sdata->dev, ac);
		}
	}
}

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static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
				   enum queue_stop_reason reason)
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{
	struct ieee80211_local *local = hw_to_local(hw);

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	trace_wake_queue(local, queue, reason);

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	if (WARN_ON(queue >= hw->queues))
		return;
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	if (!test_bit(reason, &local->queue_stop_reasons[queue]))
		return;

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	__clear_bit(reason, &local->queue_stop_reasons[queue]);

	if (local->queue_stop_reasons[queue] != 0)
		/* someone still has this queue stopped */
		return;

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	if (skb_queue_empty(&local->pending[queue])) {
		rcu_read_lock();
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		ieee80211_propagate_queue_wake(local, queue);
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		rcu_read_unlock();
	} else
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		tasklet_schedule(&local->tx_pending_tasklet);
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}
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void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
				    enum queue_stop_reason reason)
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{
	struct ieee80211_local *local = hw_to_local(hw);
	unsigned long flags;

	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
	__ieee80211_wake_queue(hw, queue, reason);
	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
{
	ieee80211_wake_queue_by_reason(hw, queue,
				       IEEE80211_QUEUE_STOP_REASON_DRIVER);
}
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EXPORT_SYMBOL(ieee80211_wake_queue);

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static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
				   enum queue_stop_reason reason)
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{
	struct ieee80211_local *local = hw_to_local(hw);
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	struct ieee80211_sub_if_data *sdata;
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	int n_acs = IEEE80211_NUM_ACS;
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	trace_stop_queue(local, queue, reason);

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	if (WARN_ON(queue >= hw->queues))
		return;
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	if (test_bit(reason, &local->queue_stop_reasons[queue]))
		return;

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	__set_bit(reason, &local->queue_stop_reasons[queue]);
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	if (local->hw.queues < IEEE80211_NUM_ACS)
		n_acs = 1;

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	rcu_read_lock();
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	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		int ac;

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		if (!sdata->dev)
			continue;

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		for (ac = 0; ac < n_acs; ac++) {
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			if (sdata->vif.hw_queue[ac] == queue ||
			    sdata->vif.cab_queue == queue)
				netif_stop_subqueue(sdata->dev, ac);
		}
	}
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	rcu_read_unlock();
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}
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void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
				    enum queue_stop_reason reason)
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{
	struct ieee80211_local *local = hw_to_local(hw);
	unsigned long flags;

	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
	__ieee80211_stop_queue(hw, queue, reason);
	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
{
	ieee80211_stop_queue_by_reason(hw, queue,
				       IEEE80211_QUEUE_STOP_REASON_DRIVER);
}
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EXPORT_SYMBOL(ieee80211_stop_queue);

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void ieee80211_add_pending_skb(struct ieee80211_local *local,
			       struct sk_buff *skb)
{
	struct ieee80211_hw *hw = &local->hw;
	unsigned long flags;
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	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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	int queue = info->hw_queue;
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	if (WARN_ON(!info->control.vif)) {
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		kfree_skb(skb);
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		return;
	}
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	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
	__ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
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	__skb_queue_tail(&local->pending[queue], skb);
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	__ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

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void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
				   struct sk_buff_head *skbs,
				   void (*fn)(void *data), void *data)
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{
	struct ieee80211_hw *hw = &local->hw;
	struct sk_buff *skb;
	unsigned long flags;
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	int queue, i;
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	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
	while ((skb = skb_dequeue(skbs))) {
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		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);

		if (WARN_ON(!info->control.vif)) {
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			kfree_skb(skb);
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			continue;
		}

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		queue = info->hw_queue;
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		__ieee80211_stop_queue(hw, queue,
				IEEE80211_QUEUE_STOP_REASON_SKB_ADD);

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		__skb_queue_tail(&local->pending[queue], skb);
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	}

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	if (fn)
		fn(data);

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	for (i = 0; i < hw->queues; i++)
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		__ieee80211_wake_queue(hw, i,
			IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

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void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
				    enum queue_stop_reason reason)
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{
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	struct ieee80211_local *local = hw_to_local(hw);
	unsigned long flags;
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	int i;

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	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);

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	for (i = 0; i < hw->queues; i++)
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		__ieee80211_stop_queue(hw, i, reason);

	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_stop_queues(struct ieee80211_hw *hw)
{
	ieee80211_stop_queues_by_reason(hw,
					IEEE80211_QUEUE_STOP_REASON_DRIVER);
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}
EXPORT_SYMBOL(ieee80211_stop_queues);

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int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
{
	struct ieee80211_local *local = hw_to_local(hw);
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	unsigned long flags;
	int ret;
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	if (WARN_ON(queue >= hw->queues))
		return true;
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	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
	ret = !!local->queue_stop_reasons[queue];
	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
	return ret;
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}
EXPORT_SYMBOL(ieee80211_queue_stopped);

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void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
				     enum queue_stop_reason reason)
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{
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	struct ieee80211_local *local = hw_to_local(hw);
	unsigned long flags;
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	int i;

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	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);

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	for (i = 0; i < hw->queues; i++)
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		__ieee80211_wake_queue(hw, i, reason);

	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_wake_queues(struct ieee80211_hw *hw)
{
	ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
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}
EXPORT_SYMBOL(ieee80211_wake_queues);
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void ieee80211_iterate_active_interfaces(
	struct ieee80211_hw *hw,
	void (*iterator)(void *data, u8 *mac,
			 struct ieee80211_vif *vif),
	void *data)
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{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_sub_if_data *sdata;

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	mutex_lock(&local->iflist_mtx);
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	list_for_each_entry(sdata, &local->interfaces, list) {
		switch (sdata->vif.type) {
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		case NL80211_IFTYPE_MONITOR:
		case NL80211_IFTYPE_AP_VLAN:
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			continue;
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		default:
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			break;
		}
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		if (ieee80211_sdata_running(sdata))
534
			iterator(data, sdata->vif.addr,
535 536 537
				 &sdata->vif);
	}

538 539 540 541 542
	sdata = rcu_dereference_protected(local->monitor_sdata,
					  lockdep_is_held(&local->iflist_mtx));
	if (sdata)
		iterator(data, sdata->vif.addr, &sdata->vif);

543
	mutex_unlock(&local->iflist_mtx);
544 545 546 547 548 549 550 551 552 553 554 555
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);

void ieee80211_iterate_active_interfaces_atomic(
	struct ieee80211_hw *hw,
	void (*iterator)(void *data, u8 *mac,
			 struct ieee80211_vif *vif),
	void *data)
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_sub_if_data *sdata;

556
	rcu_read_lock();
557

558
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
559
		switch (sdata->vif.type) {
560 561
		case NL80211_IFTYPE_MONITOR:
		case NL80211_IFTYPE_AP_VLAN:
562
			continue;
563
		default:
564 565
			break;
		}
566
		if (ieee80211_sdata_running(sdata))
567
			iterator(data, sdata->vif.addr,
568
				 &sdata->vif);
569
	}
570

571 572 573 574
	sdata = rcu_dereference(local->monitor_sdata);
	if (sdata)
		iterator(data, sdata->vif.addr, &sdata->vif);

575
	rcu_read_unlock();
576
}
577
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
578

579 580 581 582 583 584 585 586 587
/*
 * Nothing should have been stuffed into the workqueue during
 * the suspend->resume cycle. If this WARN is seen then there
 * is a bug with either the driver suspend or something in
 * mac80211 stuffing into the workqueue which we haven't yet
 * cleared during mac80211's suspend cycle.
 */
static bool ieee80211_can_queue_work(struct ieee80211_local *local)
{
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	if (WARN(local->suspended && !local->resuming,
		 "queueing ieee80211 work while going to suspend\n"))
		return false;
591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618

	return true;
}

void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
{
	struct ieee80211_local *local = hw_to_local(hw);

	if (!ieee80211_can_queue_work(local))
		return;

	queue_work(local->workqueue, work);
}
EXPORT_SYMBOL(ieee80211_queue_work);

void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
				  struct delayed_work *dwork,
				  unsigned long delay)
{
	struct ieee80211_local *local = hw_to_local(hw);

	if (!ieee80211_can_queue_work(local))
		return;

	queue_delayed_work(local->workqueue, dwork, delay);
}
EXPORT_SYMBOL(ieee80211_queue_delayed_work);

619 620 621 622 623 624 625
u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
			       struct ieee802_11_elems *elems,
			       u64 filter, u32 crc)
{
	size_t left = len;
	u8 *pos = start;
	bool calc_crc = filter != 0;
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	DECLARE_BITMAP(seen_elems, 256);
627

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	bitmap_zero(seen_elems, 256);
629 630 631 632 633 634
	memset(elems, 0, sizeof(*elems));
	elems->ie_start = start;
	elems->total_len = len;

	while (left >= 2) {
		u8 id, elen;
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		bool elem_parse_failed;
636 637 638 639 640

		id = *pos++;
		elen = *pos++;
		left -= 2;

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		if (elen > left) {
			elems->parse_error = true;
643
			break;
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		}

		if (id != WLAN_EID_VENDOR_SPECIFIC &&
		    id != WLAN_EID_QUIET &&
		    test_bit(id, seen_elems)) {
			elems->parse_error = true;
			left -= elen;
			pos += elen;
			continue;
		}
654 655 656 657

		if (calc_crc && id < 64 && (filter & (1ULL << id)))
			crc = crc32_be(crc, pos - 2, elen + 2);

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		elem_parse_failed = false;

660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684
		switch (id) {
		case WLAN_EID_SSID:
			elems->ssid = pos;
			elems->ssid_len = elen;
			break;
		case WLAN_EID_SUPP_RATES:
			elems->supp_rates = pos;
			elems->supp_rates_len = elen;
			break;
		case WLAN_EID_FH_PARAMS:
			elems->fh_params = pos;
			elems->fh_params_len = elen;
			break;
		case WLAN_EID_DS_PARAMS:
			elems->ds_params = pos;
			elems->ds_params_len = elen;
			break;
		case WLAN_EID_CF_PARAMS:
			elems->cf_params = pos;
			elems->cf_params_len = elen;
			break;
		case WLAN_EID_TIM:
			if (elen >= sizeof(struct ieee80211_tim_ie)) {
				elems->tim = (void *)pos;
				elems->tim_len = elen;
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			} else
				elem_parse_failed = true;
687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734
			break;
		case WLAN_EID_IBSS_PARAMS:
			elems->ibss_params = pos;
			elems->ibss_params_len = elen;
			break;
		case WLAN_EID_CHALLENGE:
			elems->challenge = pos;
			elems->challenge_len = elen;
			break;
		case WLAN_EID_VENDOR_SPECIFIC:
			if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
			    pos[2] == 0xf2) {
				/* Microsoft OUI (00:50:F2) */

				if (calc_crc)
					crc = crc32_be(crc, pos - 2, elen + 2);

				if (pos[3] == 1) {
					/* OUI Type 1 - WPA IE */
					elems->wpa = pos;
					elems->wpa_len = elen;
				} else if (elen >= 5 && pos[3] == 2) {
					/* OUI Type 2 - WMM IE */
					if (pos[4] == 0) {
						elems->wmm_info = pos;
						elems->wmm_info_len = elen;
					} else if (pos[4] == 1) {
						elems->wmm_param = pos;
						elems->wmm_param_len = elen;
					}
				}
			}
			break;
		case WLAN_EID_RSN:
			elems->rsn = pos;
			elems->rsn_len = elen;
			break;
		case WLAN_EID_ERP_INFO:
			elems->erp_info = pos;
			elems->erp_info_len = elen;
			break;
		case WLAN_EID_EXT_SUPP_RATES:
			elems->ext_supp_rates = pos;
			elems->ext_supp_rates_len = elen;
			break;
		case WLAN_EID_HT_CAPABILITY:
			if (elen >= sizeof(struct ieee80211_ht_cap))
				elems->ht_cap_elem = (void *)pos;
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			else
				elem_parse_failed = true;
737
			break;
738 739 740
		case WLAN_EID_HT_OPERATION:
			if (elen >= sizeof(struct ieee80211_ht_operation))
				elems->ht_operation = (void *)pos;
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			else
				elem_parse_failed = true;
743 744 745 746 747 748 749 750
			break;
		case WLAN_EID_MESH_ID:
			elems->mesh_id = pos;
			elems->mesh_id_len = elen;
			break;
		case WLAN_EID_MESH_CONFIG:
			if (elen >= sizeof(struct ieee80211_meshconf_ie))
				elems->mesh_config = (void *)pos;
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			else
				elem_parse_failed = true;
753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772
			break;
		case WLAN_EID_PEER_MGMT:
			elems->peering = pos;
			elems->peering_len = elen;
			break;
		case WLAN_EID_PREQ:
			elems->preq = pos;
			elems->preq_len = elen;
			break;
		case WLAN_EID_PREP:
			elems->prep = pos;
			elems->prep_len = elen;
			break;
		case WLAN_EID_PERR:
			elems->perr = pos;
			elems->perr_len = elen;
			break;
		case WLAN_EID_RANN:
			if (elen >= sizeof(struct ieee80211_rann_ie))
				elems->rann = (void *)pos;
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			else
				elem_parse_failed = true;
775 776
			break;
		case WLAN_EID_CHANNEL_SWITCH:
777 778 779 780 781
			if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
				elem_parse_failed = true;
				break;
			}
			elems->ch_switch_ie = (void *)pos;
782 783 784 785 786 787 788 789 790 791 792 793 794
			break;
		case WLAN_EID_QUIET:
			if (!elems->quiet_elem) {
				elems->quiet_elem = pos;
				elems->quiet_elem_len = elen;
			}
			elems->num_of_quiet_elem++;
			break;
		case WLAN_EID_COUNTRY:
			elems->country_elem = pos;
			elems->country_elem_len = elen;
			break;
		case WLAN_EID_PWR_CONSTRAINT:
795 796 797 798
			if (elen != 1) {
				elem_parse_failed = true;
				break;
			}
799 800 801 802 803 804 805 806 807 808
			elems->pwr_constr_elem = pos;
			break;
		case WLAN_EID_TIMEOUT_INTERVAL:
			elems->timeout_int = pos;
			elems->timeout_int_len = elen;
			break;
		default:
			break;
		}

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		if (elem_parse_failed)
			elems->parse_error = true;
		else
			set_bit(id, seen_elems);

814 815 816 817
		left -= elen;
		pos += elen;
	}

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	if (left != 0)
		elems->parse_error = true;

821 822 823
	return crc;
}

824 825
void ieee802_11_parse_elems(u8 *start, size_t len,
			    struct ieee802_11_elems *elems)
826 827 828 829
{
	ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
}

830 831
void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
			       bool bss_notify)
832 833 834
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_tx_queue_params qparam;
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	struct ieee80211_chanctx_conf *chanctx_conf;
836
	int ac;
837
	bool use_11b, enable_qos;
838
	int aCWmin, aCWmax;
839 840 841 842

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

843 844 845
	if (local->hw.queues < IEEE80211_NUM_ACS)
		return;

846 847
	memset(&qparam, 0, sizeof(qparam));

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848 849 850 851
	rcu_read_lock();
	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
	use_11b = (chanctx_conf &&
		   chanctx_conf->channel->band == IEEE80211_BAND_2GHZ) &&
852
		 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
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	rcu_read_unlock();
854

855 856 857 858 859 860 861
	/*
	 * By default disable QoS in STA mode for old access points, which do
	 * not support 802.11e. New APs will provide proper queue parameters,
	 * that we will configure later.
	 */
	enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);

862
	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
863 864 865 866 867 868 869
		/* Set defaults according to 802.11-2007 Table 7-37 */
		aCWmax = 1023;
		if (use_11b)
			aCWmin = 31;
		else
			aCWmin = 15;

870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906
		if (enable_qos) {
			switch (ac) {
			case IEEE80211_AC_BK:
				qparam.cw_max = aCWmax;
				qparam.cw_min = aCWmin;
				qparam.txop = 0;
				qparam.aifs = 7;
				break;
			/* never happens but let's not leave undefined */
			default:
			case IEEE80211_AC_BE:
				qparam.cw_max = aCWmax;
				qparam.cw_min = aCWmin;
				qparam.txop = 0;
				qparam.aifs = 3;
				break;
			case IEEE80211_AC_VI:
				qparam.cw_max = aCWmin;
				qparam.cw_min = (aCWmin + 1) / 2 - 1;
				if (use_11b)
					qparam.txop = 6016/32;
				else
					qparam.txop = 3008/32;
				qparam.aifs = 2;
				break;
			case IEEE80211_AC_VO:
				qparam.cw_max = (aCWmin + 1) / 2 - 1;
				qparam.cw_min = (aCWmin + 1) / 4 - 1;
				if (use_11b)
					qparam.txop = 3264/32;
				else
					qparam.txop = 1504/32;
				qparam.aifs = 2;
				break;
			}
		} else {
			/* Confiure old 802.11b/g medium access rules. */
907 908
			qparam.cw_max = aCWmax;
			qparam.cw_min = aCWmin;
909 910 911
			qparam.txop = 0;
			qparam.aifs = 2;
		}
912

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913 914
		qparam.uapsd = false;

915 916
		sdata->tx_conf[ac] = qparam;
		drv_conf_tx(local, sdata, ac, &qparam);
917
	}
918

919 920
	if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
	    sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
921
		sdata->vif.bss_conf.qos = enable_qos;
922 923 924
		if (bss_notify)
			ieee80211_bss_info_change_notify(sdata,
							 BSS_CHANGED_QOS);
925
	}
926
}
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928 929 930 931
void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
				  const size_t supp_rates_len,
				  const u8 *supp_rates)
{
J
Johannes Berg 已提交
932
	struct ieee80211_chanctx_conf *chanctx_conf;
933 934 935 936 937 938 939
	int i, have_higher_than_11mbit = 0;

	/* cf. IEEE 802.11 9.2.12 */
	for (i = 0; i < supp_rates_len; i++)
		if ((supp_rates[i] & 0x7f) * 5 > 110)
			have_higher_than_11mbit = 1;

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	rcu_read_lock();
	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);

	if (chanctx_conf &&
	    chanctx_conf->channel->band == IEEE80211_BAND_2GHZ &&
945 946 947 948
	    have_higher_than_11mbit)
		sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
	else
		sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
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	rcu_read_unlock();
950

951
	ieee80211_set_wmm_default(sdata, true);
952 953
}

954
u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
955 956 957 958
			      enum ieee80211_band band)
{
	struct ieee80211_supported_band *sband;
	struct ieee80211_rate *bitrates;
959
	u32 mandatory_rates;
960 961 962 963
	enum ieee80211_rate_flags mandatory_flag;
	int i;

	sband = local->hw.wiphy->bands[band];
964 965
	if (WARN_ON(!sband))
		return 1;
966 967 968 969 970 971 972 973 974 975 976 977 978

	if (band == IEEE80211_BAND_2GHZ)
		mandatory_flag = IEEE80211_RATE_MANDATORY_B;
	else
		mandatory_flag = IEEE80211_RATE_MANDATORY_A;

	bitrates = sband->bitrates;
	mandatory_rates = 0;
	for (i = 0; i < sband->n_bitrates; i++)
		if (bitrates[i].flags & mandatory_flag)
			mandatory_rates |= BIT(i);
	return mandatory_rates;
}
979 980 981

void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
			 u16 transaction, u16 auth_alg,
982 983
			 u8 *extra, size_t extra_len, const u8 *da,
			 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx)
984 985 986 987
{
	struct ieee80211_local *local = sdata->local;
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt;
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	int err;
989 990

	skb = dev_alloc_skb(local->hw.extra_tx_headroom +
991
			    sizeof(*mgmt) + 6 + extra_len);
992
	if (!skb)
993
		return;
994

995 996 997 998 999 1000
	skb_reserve(skb, local->hw.extra_tx_headroom);

	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
	memset(mgmt, 0, 24 + 6);
	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
					  IEEE80211_STYPE_AUTH);
1001
	memcpy(mgmt->da, da, ETH_ALEN);
1002
	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1003 1004 1005 1006 1007 1008 1009
	memcpy(mgmt->bssid, bssid, ETH_ALEN);
	mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
	mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
	mgmt->u.auth.status_code = cpu_to_le16(0);
	if (extra)
		memcpy(skb_put(skb, extra_len), extra, extra_len);

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	if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
		mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
		err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
		WARN_ON(err);
	}

1016 1017
	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
	ieee80211_tx_skb(sdata, skb);
1018 1019
}

1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058
void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
				    const u8 *bssid, u16 stype, u16 reason,
				    bool send_frame, u8 *frame_buf)
{
	struct ieee80211_local *local = sdata->local;
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt = (void *)frame_buf;

	/* build frame */
	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
	mgmt->duration = 0; /* initialize only */
	mgmt->seq_ctrl = 0; /* initialize only */
	memcpy(mgmt->da, bssid, ETH_ALEN);
	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
	memcpy(mgmt->bssid, bssid, ETH_ALEN);
	/* u.deauth.reason_code == u.disassoc.reason_code */
	mgmt->u.deauth.reason_code = cpu_to_le16(reason);

	if (send_frame) {
		skb = dev_alloc_skb(local->hw.extra_tx_headroom +
				    IEEE80211_DEAUTH_FRAME_LEN);
		if (!skb)
			return;

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

		/* copy in frame */
		memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
		       mgmt, IEEE80211_DEAUTH_FRAME_LEN);

		if (sdata->vif.type != NL80211_IFTYPE_STATION ||
		    !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
			IEEE80211_SKB_CB(skb)->flags |=
				IEEE80211_TX_INTFL_DONT_ENCRYPT;

		ieee80211_tx_skb(sdata, skb);
	}
}

1059
int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1060
			     const u8 *ie, size_t ie_len,
1061 1062
			     enum ieee80211_band band, u32 rate_mask,
			     u8 channel)
1063 1064
{
	struct ieee80211_supported_band *sband;
1065 1066 1067
	u8 *pos;
	size_t offset = 0, noffset;
	int supp_rates_len, i;
1068 1069 1070
	u8 rates[32];
	int num_rates;
	int ext_rates_len;
1071

1072
	sband = local->hw.wiphy->bands[band];
1073 1074
	if (WARN_ON_ONCE(!sband))
		return 0;
1075 1076 1077

	pos = buffer;

1078 1079 1080 1081 1082 1083 1084 1085
	num_rates = 0;
	for (i = 0; i < sband->n_bitrates; i++) {
		if ((BIT(i) & rate_mask) == 0)
			continue; /* skip rate */
		rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
	}

	supp_rates_len = min_t(int, num_rates, 8);
1086

1087
	*pos++ = WLAN_EID_SUPP_RATES;
1088
	*pos++ = supp_rates_len;
1089 1090
	memcpy(pos, rates, supp_rates_len);
	pos += supp_rates_len;
1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107

	/* insert "request information" if in custom IEs */
	if (ie && ie_len) {
		static const u8 before_extrates[] = {
			WLAN_EID_SSID,
			WLAN_EID_SUPP_RATES,
			WLAN_EID_REQUEST,
		};
		noffset = ieee80211_ie_split(ie, ie_len,
					     before_extrates,
					     ARRAY_SIZE(before_extrates),
					     offset);
		memcpy(pos, ie + offset, noffset - offset);
		pos += noffset - offset;
		offset = noffset;
	}

1108 1109
	ext_rates_len = num_rates - supp_rates_len;
	if (ext_rates_len > 0) {
1110
		*pos++ = WLAN_EID_EXT_SUPP_RATES;
1111 1112 1113
		*pos++ = ext_rates_len;
		memcpy(pos, rates + supp_rates_len, ext_rates_len);
		pos += ext_rates_len;
1114 1115
	}

1116 1117 1118 1119 1120 1121
	if (channel && sband->band == IEEE80211_BAND_2GHZ) {
		*pos++ = WLAN_EID_DS_PARAMS;
		*pos++ = 1;
		*pos++ = channel;
	}

1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137
	/* insert custom IEs that go before HT */
	if (ie && ie_len) {
		static const u8 before_ht[] = {
			WLAN_EID_SSID,
			WLAN_EID_SUPP_RATES,
			WLAN_EID_REQUEST,
			WLAN_EID_EXT_SUPP_RATES,
			WLAN_EID_DS_PARAMS,
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
		};
		noffset = ieee80211_ie_split(ie, ie_len,
					     before_ht, ARRAY_SIZE(before_ht),
					     offset);
		memcpy(pos, ie + offset, noffset - offset);
		pos += noffset - offset;
		offset = noffset;
1138 1139
	}

1140
	if (sband->ht_cap.ht_supported)
B
Ben Greear 已提交
1141 1142
		pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
						sband->ht_cap.cap);
1143

1144 1145 1146 1147 1148
	/*
	 * If adding more here, adjust code in main.c
	 * that calculates local->scan_ies_len.
	 */

1149 1150 1151 1152 1153
	/* add any remaining custom IEs */
	if (ie && ie_len) {
		noffset = ie_len;
		memcpy(pos, ie + offset, noffset - offset);
		pos += noffset - offset;
1154 1155
	}

1156 1157 1158 1159
	if (sband->vht_cap.vht_supported)
		pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
						 sband->vht_cap.cap);

1160 1161 1162
	return pos - buffer;
}

1163
struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1164
					  u8 *dst, u32 ratemask,
1165
					  struct ieee80211_channel *chan,
1166
					  const u8 *ssid, size_t ssid_len,
1167 1168
					  const u8 *ie, size_t ie_len,
					  bool directed)
1169 1170 1171 1172
{
	struct ieee80211_local *local = sdata->local;
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt;
1173 1174
	size_t buf_len;
	u8 *buf;
1175
	u8 chan_no;
1176 1177 1178

	/* FIXME: come up with a proper value */
	buf = kmalloc(200 + ie_len, GFP_KERNEL);
1179
	if (!buf)
1180
		return NULL;
1181

1182 1183 1184 1185 1186 1187
	/*
	 * Do not send DS Channel parameter for directed probe requests
	 * in order to maximize the chance that we get a response.  Some
	 * badly-behaved APs don't respond when this parameter is included.
	 */
	if (directed)
1188
		chan_no = 0;
1189
	else
1190
		chan_no = ieee80211_frequency_to_channel(chan->center_freq);
1191

1192 1193
	buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, chan->band,
					   ratemask, chan_no);
1194 1195 1196 1197

	skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
				     ssid, ssid_len,
				     buf, buf_len);
1198 1199
	if (!skb)
		goto out;
1200

1201
	if (dst) {
1202
		mgmt = (struct ieee80211_mgmt *) skb->data;
1203 1204 1205 1206
		memcpy(mgmt->da, dst, ETH_ALEN);
		memcpy(mgmt->bssid, dst, ETH_ALEN);
	}

1207
	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1208 1209

 out:
1210
	kfree(buf);
1211 1212 1213 1214 1215 1216

	return skb;
}

void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
			      const u8 *ssid, size_t ssid_len,
1217
			      const u8 *ie, size_t ie_len,
1218
			      u32 ratemask, bool directed, bool no_cck,
J
Johannes Berg 已提交
1219
			      struct ieee80211_channel *channel, bool scan)
1220 1221 1222
{
	struct sk_buff *skb;

1223
	skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1224
					ssid, ssid_len,
1225
					ie, ie_len, directed);
1226 1227 1228 1229
	if (skb) {
		if (no_cck)
			IEEE80211_SKB_CB(skb)->flags |=
				IEEE80211_TX_CTL_NO_CCK_RATE;
J
Johannes Berg 已提交
1230 1231 1232 1233
		if (scan)
			ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
		else
			ieee80211_tx_skb(sdata, skb);
1234
	}
1235 1236 1237 1238
}

u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
			    struct ieee802_11_elems *elems,
1239
			    enum ieee80211_band band, u32 *basic_rates)
1240 1241 1242 1243 1244 1245 1246 1247
{
	struct ieee80211_supported_band *sband;
	struct ieee80211_rate *bitrates;
	size_t num_rates;
	u32 supp_rates;
	int i, j;
	sband = local->hw.wiphy->bands[band];

1248 1249
	if (WARN_ON(!sband))
		return 1;
1250 1251 1252 1253 1254 1255 1256 1257

	bitrates = sband->bitrates;
	num_rates = sband->n_bitrates;
	supp_rates = 0;
	for (i = 0; i < elems->supp_rates_len +
		     elems->ext_supp_rates_len; i++) {
		u8 rate = 0;
		int own_rate;
1258
		bool is_basic;
1259 1260 1261 1262 1263 1264
		if (i < elems->supp_rates_len)
			rate = elems->supp_rates[i];
		else if (elems->ext_supp_rates)
			rate = elems->ext_supp_rates
				[i - elems->supp_rates_len];
		own_rate = 5 * (rate & 0x7f);
1265 1266 1267 1268 1269 1270 1271
		is_basic = !!(rate & 0x80);

		if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
			continue;

		for (j = 0; j < num_rates; j++) {
			if (bitrates[j].bitrate == own_rate) {
1272
				supp_rates |= BIT(j);
1273 1274 1275 1276
				if (basic_rates && is_basic)
					*basic_rates |= BIT(j);
			}
		}
1277 1278 1279
	}
	return supp_rates;
}
1280

1281 1282 1283
void ieee80211_stop_device(struct ieee80211_local *local)
{
	ieee80211_led_radio(local, false);
1284
	ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1285 1286 1287 1288

	cancel_work_sync(&local->reconfig_filter);

	flush_workqueue(local->workqueue);
1289
	drv_stop(local);
1290 1291
}

1292 1293 1294 1295
int ieee80211_reconfig(struct ieee80211_local *local)
{
	struct ieee80211_hw *hw = &local->hw;
	struct ieee80211_sub_if_data *sdata;
J
Johannes Berg 已提交
1296
	struct ieee80211_chanctx *ctx;
1297
	struct sta_info *sta;
1298
	int res, i;
1299

1300
#ifdef CONFIG_PM
J
Johannes Berg 已提交
1301 1302
	if (local->suspended)
		local->resuming = true;
1303

1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319
	if (local->wowlan) {
		local->wowlan = false;
		res = drv_resume(local);
		if (res < 0) {
			local->resuming = false;
			return res;
		}
		if (res == 0)
			goto wake_up;
		WARN_ON(res > 1);
		/*
		 * res is 1, which means the driver requested
		 * to go through a regular reset on wakeup.
		 */
	}
#endif
1320 1321 1322
	/* everything else happens only if HW was up & running */
	if (!local->open_count)
		goto wake_up;
1323

1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335
	/*
	 * Upon resume hardware can sometimes be goofy due to
	 * various platform / driver / bus issues, so restarting
	 * the device may at times not work immediately. Propagate
	 * the error.
	 */
	res = drv_start(local);
	if (res) {
		WARN(local->suspended, "Hardware became unavailable "
		     "upon resume. This could be a software issue "
		     "prior to suspend or a hardware issue.\n");
		return res;
1336 1337
	}

1338 1339 1340 1341 1342 1343 1344 1345 1346
	/* setup fragmentation threshold */
	drv_set_frag_threshold(local, hw->wiphy->frag_threshold);

	/* setup RTS threshold */
	drv_set_rts_threshold(local, hw->wiphy->rts_threshold);

	/* reset coverage class */
	drv_set_coverage_class(local, hw->wiphy->coverage_class);

1347 1348 1349 1350
	ieee80211_led_radio(local, true);
	ieee80211_mod_tpt_led_trig(local,
				   IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);

1351
	/* add interfaces */
1352 1353 1354 1355 1356 1357 1358 1359 1360 1361
	sdata = rtnl_dereference(local->monitor_sdata);
	if (sdata) {
		res = drv_add_interface(local, sdata);
		if (WARN_ON(res)) {
			rcu_assign_pointer(local->monitor_sdata, NULL);
			synchronize_net();
			kfree(sdata);
		}
	}

1362 1363 1364
	list_for_each_entry(sdata, &local->interfaces, list) {
		if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
		    sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1365
		    ieee80211_sdata_running(sdata))
1366
			res = drv_add_interface(local, sdata);
1367 1368
	}

J
Johannes Berg 已提交
1369 1370 1371 1372 1373 1374
	/* add channel contexts */
	mutex_lock(&local->chanctx_mtx);
	list_for_each_entry(ctx, &local->chanctx_list, list)
		WARN_ON(drv_add_chanctx(local, ctx));
	mutex_unlock(&local->chanctx_mtx);

1375
	/* add STAs back */
1376 1377
	mutex_lock(&local->sta_mtx);
	list_for_each_entry(sta, &local->sta_list, list) {
1378
		enum ieee80211_sta_state state;
J
Johannes Berg 已提交
1379

1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390
		if (!sta->uploaded)
			continue;

		/* AP-mode stations will be added later */
		if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
			continue;

		for (state = IEEE80211_STA_NOTEXIST;
		     state < sta->sta_state; state++)
			WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
					      state + 1));
1391
	}
1392
	mutex_unlock(&local->sta_mtx);
1393

1394
	/* reconfigure tx conf */
1395 1396 1397 1398 1399 1400
	if (hw->queues >= IEEE80211_NUM_ACS) {
		list_for_each_entry(sdata, &local->interfaces, list) {
			if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
			    sdata->vif.type == NL80211_IFTYPE_MONITOR ||
			    !ieee80211_sdata_running(sdata))
				continue;
1401

1402 1403 1404 1405
			for (i = 0; i < IEEE80211_NUM_ACS; i++)
				drv_conf_tx(local, sdata, i,
					    &sdata->tx_conf[i]);
		}
1406
	}
1407

1408 1409 1410 1411 1412 1413 1414
	/* reconfigure hardware */
	ieee80211_hw_config(local, ~0);

	ieee80211_configure_filter(local);

	/* Finally also reconfigure all the BSS information */
	list_for_each_entry(sdata, &local->interfaces, list) {
J
Johannes Berg 已提交
1415
		struct ieee80211_chanctx_conf *ctx_conf;
1416 1417
		u32 changed;

1418
		if (!ieee80211_sdata_running(sdata))
1419
			continue;
1420

J
Johannes Berg 已提交
1421 1422 1423 1424 1425 1426 1427 1428 1429 1430
		mutex_lock(&local->chanctx_mtx);
		ctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
				lockdep_is_held(&local->chanctx_mtx));
		if (ctx_conf) {
			ctx = container_of(ctx_conf, struct ieee80211_chanctx,
					   conf);
			drv_assign_vif_chanctx(local, sdata, ctx);
		}
		mutex_unlock(&local->chanctx_mtx);

1431 1432 1433 1434 1435 1436 1437 1438
		/* common change flags for all interface types */
		changed = BSS_CHANGED_ERP_CTS_PROT |
			  BSS_CHANGED_ERP_PREAMBLE |
			  BSS_CHANGED_ERP_SLOT |
			  BSS_CHANGED_HT |
			  BSS_CHANGED_BASIC_RATES |
			  BSS_CHANGED_BEACON_INT |
			  BSS_CHANGED_BSSID |
1439
			  BSS_CHANGED_CQM |
1440 1441
			  BSS_CHANGED_QOS |
			  BSS_CHANGED_IDLE;
1442

1443 1444
		switch (sdata->vif.type) {
		case NL80211_IFTYPE_STATION:
1445
			changed |= BSS_CHANGED_ASSOC |
E
Eliad Peller 已提交
1446 1447
				   BSS_CHANGED_ARP_FILTER |
				   BSS_CHANGED_PS;
1448
			mutex_lock(&sdata->u.mgd.mtx);
1449
			ieee80211_bss_info_change_notify(sdata, changed);
1450
			mutex_unlock(&sdata->u.mgd.mtx);
1451
			break;
1452
		case NL80211_IFTYPE_ADHOC:
1453 1454
			changed |= BSS_CHANGED_IBSS;
			/* fall through */
1455
		case NL80211_IFTYPE_AP:
1456 1457 1458 1459 1460
			changed |= BSS_CHANGED_SSID;

			if (sdata->vif.type == NL80211_IFTYPE_AP)
				changed |= BSS_CHANGED_AP_PROBE_RESP;

1461
			/* fall through */
1462
		case NL80211_IFTYPE_MESH_POINT:
1463 1464
			changed |= BSS_CHANGED_BEACON |
				   BSS_CHANGED_BEACON_ENABLED;
1465
			ieee80211_bss_info_change_notify(sdata, changed);
1466 1467 1468 1469 1470 1471 1472
			break;
		case NL80211_IFTYPE_WDS:
			break;
		case NL80211_IFTYPE_AP_VLAN:
		case NL80211_IFTYPE_MONITOR:
			/* ignore virtual */
			break;
1473
		case NL80211_IFTYPE_P2P_DEVICE:
1474 1475
			changed = BSS_CHANGED_IDLE;
			break;
1476
		case NL80211_IFTYPE_UNSPECIFIED:
1477
		case NUM_NL80211_IFTYPES:
1478 1479
		case NL80211_IFTYPE_P2P_CLIENT:
		case NL80211_IFTYPE_P2P_GO:
1480 1481 1482 1483 1484
			WARN_ON(1);
			break;
		}
	}

1485 1486
	ieee80211_recalc_ps(local, -1);

1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501
	/*
	 * The sta might be in psm against the ap (e.g. because
	 * this was the state before a hw restart), so we
	 * explicitly send a null packet in order to make sure
	 * it'll sync against the ap (and get out of psm).
	 */
	if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
		list_for_each_entry(sdata, &local->interfaces, list) {
			if (sdata->vif.type != NL80211_IFTYPE_STATION)
				continue;

			ieee80211_send_nullfunc(local, sdata, 0);
		}
	}

1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519
	/* APs are now beaconing, add back stations */
	mutex_lock(&local->sta_mtx);
	list_for_each_entry(sta, &local->sta_list, list) {
		enum ieee80211_sta_state state;

		if (!sta->uploaded)
			continue;

		if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
			continue;

		for (state = IEEE80211_STA_NOTEXIST;
		     state < sta->sta_state; state++)
			WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
					      state + 1));
	}
	mutex_unlock(&local->sta_mtx);

1520 1521 1522 1523 1524
	/* add back keys */
	list_for_each_entry(sdata, &local->interfaces, list)
		if (ieee80211_sdata_running(sdata))
			ieee80211_enable_keys(sdata);

1525
 wake_up:
1526 1527 1528
	local->in_reconfig = false;
	barrier();

1529 1530 1531 1532 1533 1534 1535 1536 1537 1538
	/*
	 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
	 * sessions can be established after a resume.
	 *
	 * Also tear down aggregation sessions since reconfiguring
	 * them in a hardware restart scenario is not easily done
	 * right now, and the hardware will have lost information
	 * about the sessions, but we and the AP still think they
	 * are active. This is really a workaround though.
	 */
1539
	if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1540 1541 1542
		mutex_lock(&local->sta_mtx);

		list_for_each_entry(sta, &local->sta_list, list) {
1543
			ieee80211_sta_tear_down_BA_sessions(sta, true);
J
Johannes Berg 已提交
1544
			clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1545
		}
1546 1547

		mutex_unlock(&local->sta_mtx);
1548 1549
	}

1550 1551 1552
	ieee80211_wake_queues_by_reason(hw,
			IEEE80211_QUEUE_STOP_REASON_SUSPEND);

1553 1554 1555 1556
	/*
	 * If this is for hw restart things are still running.
	 * We may want to change that later, however.
	 */
J
Johannes Berg 已提交
1557
	if (!local->suspended)
1558 1559 1560
		return 0;

#ifdef CONFIG_PM
J
Johannes Berg 已提交
1561
	/* first set suspended false, then resuming */
1562
	local->suspended = false;
J
Johannes Berg 已提交
1563 1564
	mb();
	local->resuming = false;
1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581

	list_for_each_entry(sdata, &local->interfaces, list) {
		switch(sdata->vif.type) {
		case NL80211_IFTYPE_STATION:
			ieee80211_sta_restart(sdata);
			break;
		case NL80211_IFTYPE_ADHOC:
			ieee80211_ibss_restart(sdata);
			break;
		case NL80211_IFTYPE_MESH_POINT:
			ieee80211_mesh_restart(sdata);
			break;
		default:
			break;
		}
	}

1582
	mod_timer(&local->sta_cleanup, jiffies + 1);
1583

1584
	mutex_lock(&local->sta_mtx);
1585 1586
	list_for_each_entry(sta, &local->sta_list, list)
		mesh_plink_restart(sta);
1587
	mutex_unlock(&local->sta_mtx);
1588 1589 1590
#else
	WARN_ON(1);
#endif
1591 1592
	return 0;
}
1593

1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620
void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
{
	struct ieee80211_sub_if_data *sdata;
	struct ieee80211_local *local;
	struct ieee80211_key *key;

	if (WARN_ON(!vif))
		return;

	sdata = vif_to_sdata(vif);
	local = sdata->local;

	if (WARN_ON(!local->resuming))
		return;

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

	sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;

	mutex_lock(&local->key_mtx);
	list_for_each_entry(key, &sdata->key_list, list)
		key->flags |= KEY_FLAG_TAINTED;
	mutex_unlock(&local->key_mtx);
}
EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);

1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639
static int check_mgd_smps(struct ieee80211_if_managed *ifmgd,
			  enum ieee80211_smps_mode *smps_mode)
{
	if (ifmgd->associated) {
		*smps_mode = ifmgd->ap_smps;

		if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) {
			if (ifmgd->powersave)
				*smps_mode = IEEE80211_SMPS_DYNAMIC;
			else
				*smps_mode = IEEE80211_SMPS_OFF;
		}

		return 1;
	}

	return 0;
}

1640
void ieee80211_recalc_smps(struct ieee80211_local *local)
1641 1642 1643 1644 1645
{
	struct ieee80211_sub_if_data *sdata;
	enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF;
	int count = 0;

1646
	mutex_lock(&local->iflist_mtx);
1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658

	/*
	 * This function could be improved to handle multiple
	 * interfaces better, but right now it makes any
	 * non-station interfaces force SM PS to be turned
	 * off. If there are multiple station interfaces it
	 * could also use the best possible mode, e.g. if
	 * one is in static and the other in dynamic then
	 * dynamic is ok.
	 */

	list_for_each_entry(sdata, &local->interfaces, list) {
1659
		if (!ieee80211_sdata_running(sdata))
1660
			continue;
1661 1662
		if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
			continue;
1663 1664
		if (sdata->vif.type != NL80211_IFTYPE_STATION)
			goto set;
1665 1666

		count += check_mgd_smps(&sdata->u.mgd, &smps_mode);
1667 1668 1669 1670 1671 1672 1673 1674

		if (count > 1) {
			smps_mode = IEEE80211_SMPS_OFF;
			break;
		}
	}

	if (smps_mode == local->smps_mode)
1675
		goto unlock;
1676 1677 1678 1679 1680

 set:
	local->smps_mode = smps_mode;
	/* changed flag is auto-detected for this */
	ieee80211_hw_config(local, 0);
1681 1682
 unlock:
	mutex_unlock(&local->iflist_mtx);
1683
}
1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739

static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
{
	int i;

	for (i = 0; i < n_ids; i++)
		if (ids[i] == id)
			return true;
	return false;
}

/**
 * ieee80211_ie_split - split an IE buffer according to ordering
 *
 * @ies: the IE buffer
 * @ielen: the length of the IE buffer
 * @ids: an array with element IDs that are allowed before
 *	the split
 * @n_ids: the size of the element ID array
 * @offset: offset where to start splitting in the buffer
 *
 * This function splits an IE buffer by updating the @offset
 * variable to point to the location where the buffer should be
 * split.
 *
 * It assumes that the given IE buffer is well-formed, this
 * has to be guaranteed by the caller!
 *
 * It also assumes that the IEs in the buffer are ordered
 * correctly, if not the result of using this function will not
 * be ordered correctly either, i.e. it does no reordering.
 *
 * The function returns the offset where the next part of the
 * buffer starts, which may be @ielen if the entire (remainder)
 * of the buffer should be used.
 */
size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
			  const u8 *ids, int n_ids, size_t offset)
{
	size_t pos = offset;

	while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
		pos += 2 + ies[pos + 1];

	return pos;
}

size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
{
	size_t pos = offset;

	while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
		pos += 2 + ies[pos + 1];

	return pos;
}
1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779

static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
					    int rssi_min_thold,
					    int rssi_max_thold)
{
	trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);

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

	/*
	 * Scale up threshold values before storing it, as the RSSI averaging
	 * algorithm uses a scaled up value as well. Change this scaling
	 * factor if the RSSI averaging algorithm changes.
	 */
	sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
	sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
}

void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
				    int rssi_min_thold,
				    int rssi_max_thold)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

	WARN_ON(rssi_min_thold == rssi_max_thold ||
		rssi_min_thold > rssi_max_thold);

	_ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
				       rssi_max_thold);
}
EXPORT_SYMBOL(ieee80211_enable_rssi_reports);

void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

	_ieee80211_enable_rssi_reports(sdata, 0, 0);
}
EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1780

B
Ben Greear 已提交
1781
u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795
			      u16 cap)
{
	__le16 tmp;

	*pos++ = WLAN_EID_HT_CAPABILITY;
	*pos++ = sizeof(struct ieee80211_ht_cap);
	memset(pos, 0, sizeof(struct ieee80211_ht_cap));

	/* capability flags */
	tmp = cpu_to_le16(cap);
	memcpy(pos, &tmp, sizeof(u16));
	pos += sizeof(u16);

	/* AMPDU parameters */
B
Ben Greear 已提交
1796 1797
	*pos++ = ht_cap->ampdu_factor |
		 (ht_cap->ampdu_density <<
1798 1799 1800
			IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);

	/* MCS set */
B
Ben Greear 已提交
1801 1802
	memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
	pos += sizeof(ht_cap->mcs);
1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815

	/* extended capabilities */
	pos += sizeof(__le16);

	/* BF capabilities */
	pos += sizeof(__le32);

	/* antenna selection */
	pos += sizeof(u8);

	return pos;
}

1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836
u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
							   u32 cap)
{
	__le32 tmp;

	*pos++ = WLAN_EID_VHT_CAPABILITY;
	*pos++ = sizeof(struct ieee80211_vht_capabilities);
	memset(pos, 0, sizeof(struct ieee80211_vht_capabilities));

	/* capability flags */
	tmp = cpu_to_le32(cap);
	memcpy(pos, &tmp, sizeof(u32));
	pos += sizeof(u32);

	/* VHT MCS set */
	memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
	pos += sizeof(vht_cap->vht_mcs);

	return pos;
}

1837
u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1838
			       struct ieee80211_channel *channel,
1839 1840
			       enum nl80211_channel_type channel_type,
			       u16 prot_mode)
1841
{
1842
	struct ieee80211_ht_operation *ht_oper;
1843
	/* Build HT Information */
1844 1845 1846 1847
	*pos++ = WLAN_EID_HT_OPERATION;
	*pos++ = sizeof(struct ieee80211_ht_operation);
	ht_oper = (struct ieee80211_ht_operation *)pos;
	ht_oper->primary_chan =
1848 1849 1850
			ieee80211_frequency_to_channel(channel->center_freq);
	switch (channel_type) {
	case NL80211_CHAN_HT40MINUS:
1851
		ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1852 1853
		break;
	case NL80211_CHAN_HT40PLUS:
1854
		ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1855 1856 1857
		break;
	case NL80211_CHAN_HT20:
	default:
1858
		ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1859 1860
		break;
	}
1861 1862 1863
	if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
	    channel_type != NL80211_CHAN_NO_HT &&
	    channel_type != NL80211_CHAN_HT20)
1864
		ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
1865

1866
	ht_oper->operation_mode = cpu_to_le16(prot_mode);
1867
	ht_oper->stbc_param = 0x0000;
1868 1869 1870

	/* It seems that Basic MCS set and Supported MCS set
	   are identical for the first 10 bytes */
1871 1872
	memset(&ht_oper->basic_set, 0, 16);
	memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
1873

1874
	return pos + sizeof(struct ieee80211_ht_operation);
1875 1876 1877
}

enum nl80211_channel_type
1878
ieee80211_ht_oper_to_channel_type(struct ieee80211_ht_operation *ht_oper)
1879 1880 1881
{
	enum nl80211_channel_type channel_type;

1882
	if (!ht_oper)
1883 1884
		return NL80211_CHAN_NO_HT;

1885
	switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901
	case IEEE80211_HT_PARAM_CHA_SEC_NONE:
		channel_type = NL80211_CHAN_HT20;
		break;
	case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
		channel_type = NL80211_CHAN_HT40PLUS;
		break;
	case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
		channel_type = NL80211_CHAN_HT40MINUS;
		break;
	default:
		channel_type = NL80211_CHAN_NO_HT;
	}

	return channel_type;
}

1902
int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1903 1904
			    struct sk_buff *skb, bool need_basic,
			    enum ieee80211_band band)
1905 1906 1907 1908 1909
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_supported_band *sband;
	int rate;
	u8 i, rates, *pos;
1910
	u32 basic_rates = sdata->vif.bss_conf.basic_rates;
1911

1912
	sband = local->hw.wiphy->bands[band];
1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923
	rates = sband->n_bitrates;
	if (rates > 8)
		rates = 8;

	if (skb_tailroom(skb) < rates + 2)
		return -ENOMEM;

	pos = skb_put(skb, rates + 2);
	*pos++ = WLAN_EID_SUPP_RATES;
	*pos++ = rates;
	for (i = 0; i < rates; i++) {
1924 1925 1926
		u8 basic = 0;
		if (need_basic && basic_rates & BIT(i))
			basic = 0x80;
1927
		rate = sband->bitrates[i].bitrate;
1928
		*pos++ = basic | (u8) (rate / 5);
1929 1930 1931 1932 1933
	}

	return 0;
}

1934
int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
1935 1936
				struct sk_buff *skb, bool need_basic,
				enum ieee80211_band band)
1937 1938 1939 1940 1941
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_supported_band *sband;
	int rate;
	u8 i, exrates, *pos;
1942
	u32 basic_rates = sdata->vif.bss_conf.basic_rates;
1943

1944
	sband = local->hw.wiphy->bands[band];
1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958
	exrates = sband->n_bitrates;
	if (exrates > 8)
		exrates -= 8;
	else
		exrates = 0;

	if (skb_tailroom(skb) < exrates + 2)
		return -ENOMEM;

	if (exrates) {
		pos = skb_put(skb, exrates + 2);
		*pos++ = WLAN_EID_EXT_SUPP_RATES;
		*pos++ = exrates;
		for (i = 8; i < sband->n_bitrates; i++) {
1959 1960 1961
			u8 basic = 0;
			if (need_basic && basic_rates & BIT(i))
				basic = 0x80;
1962
			rate = sband->bitrates[i].bitrate;
1963
			*pos++ = basic | (u8) (rate / 5);
1964 1965 1966 1967
		}
	}
	return 0;
}
1968 1969 1970 1971 1972 1973

int ieee80211_ave_rssi(struct ieee80211_vif *vif)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

1974 1975 1976 1977
	if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
		/* non-managed type inferfaces */
		return 0;
	}
1978 1979
	return ifmgd->ave_beacon_signal;
}
1980
EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);