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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>
- * Copyright 2013-2014 Intel Mobile Communications GmbH
- * Copyright (C) 2015-2016 Intel Deutschland GmbH
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * utilities for mac80211
- */
- #include <net/mac80211.h>
- #include <linux/netdevice.h>
- #include <linux/export.h>
- #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>
- #include <linux/crc32.h>
- #include <net/net_namespace.h>
- #include <net/cfg80211.h>
- #include <net/rtnetlink.h>
- #include "ieee80211_i.h"
- #include "driver-ops.h"
- #include "rate.h"
- #include "mesh.h"
- #include "wme.h"
- #include "led.h"
- #include "wep.h"
- /* privid for wiphys to determine whether they belong to us or not */
- const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
- 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);
- void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
- {
- struct sk_buff *skb;
- struct ieee80211_hdr *hdr;
- skb_queue_walk(&tx->skbs, skb) {
- hdr = (struct ieee80211_hdr *) skb->data;
- hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
- }
- }
- int ieee80211_frame_duration(enum nl80211_band band, size_t len,
- int rate, int erp, int short_preamble,
- int shift)
- {
- 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.
- *
- * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
- * is assumed to be 0 otherwise.
- */
- if (band == NL80211_BAND_5GHZ || erp) {
- /*
- * 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 - 18.5.2: aSIFSTime = 16 usec
- * 802.11g - 19.8.4: aSIFSTime = 10 usec +
- * signal ext = 6 usec
- */
- dur = 16; /* SIFS + signal ext */
- dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
- dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
- /* IEEE 802.11-2012 18.3.2.4: all values above are:
- * * times 4 for 5 MHz
- * * times 2 for 10 MHz
- */
- dur *= 1 << shift;
- /* rates should already consider the channel bandwidth,
- * don't apply divisor again.
- */
- 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 */
- __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif,
- enum nl80211_band band,
- size_t frame_len,
- struct ieee80211_rate *rate)
- {
- struct ieee80211_sub_if_data *sdata;
- u16 dur;
- int erp, shift = 0;
- bool short_preamble = false;
- erp = 0;
- if (vif) {
- sdata = vif_to_sdata(vif);
- short_preamble = sdata->vif.bss_conf.use_short_preamble;
- if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
- erp = rate->flags & IEEE80211_RATE_ERP_G;
- shift = ieee80211_vif_get_shift(vif);
- }
- dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
- short_preamble, shift);
- return cpu_to_le16(dur);
- }
- EXPORT_SYMBOL(ieee80211_generic_frame_duration);
- __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif, size_t frame_len,
- const struct ieee80211_tx_info *frame_txctl)
- {
- struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_rate *rate;
- struct ieee80211_sub_if_data *sdata;
- bool short_preamble;
- int erp, shift = 0, bitrate;
- u16 dur;
- struct ieee80211_supported_band *sband;
- sband = local->hw.wiphy->bands[frame_txctl->band];
- short_preamble = false;
- rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
- erp = 0;
- if (vif) {
- sdata = vif_to_sdata(vif);
- short_preamble = sdata->vif.bss_conf.use_short_preamble;
- if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
- erp = rate->flags & IEEE80211_RATE_ERP_G;
- shift = ieee80211_vif_get_shift(vif);
- }
- bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
- /* CTS duration */
- dur = ieee80211_frame_duration(sband->band, 10, bitrate,
- erp, short_preamble, shift);
- /* Data frame duration */
- dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
- erp, short_preamble, shift);
- /* ACK duration */
- dur += ieee80211_frame_duration(sband->band, 10, bitrate,
- erp, short_preamble, shift);
- return cpu_to_le16(dur);
- }
- EXPORT_SYMBOL(ieee80211_rts_duration);
- __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif,
- size_t frame_len,
- const struct ieee80211_tx_info *frame_txctl)
- {
- struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_rate *rate;
- struct ieee80211_sub_if_data *sdata;
- bool short_preamble;
- int erp, shift = 0, bitrate;
- u16 dur;
- struct ieee80211_supported_band *sband;
- sband = local->hw.wiphy->bands[frame_txctl->band];
- short_preamble = false;
- rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
- erp = 0;
- if (vif) {
- sdata = vif_to_sdata(vif);
- short_preamble = sdata->vif.bss_conf.use_short_preamble;
- if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
- erp = rate->flags & IEEE80211_RATE_ERP_G;
- shift = ieee80211_vif_get_shift(vif);
- }
- bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
- /* Data frame duration */
- dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
- erp, short_preamble, shift);
- if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
- /* ACK duration */
- dur += ieee80211_frame_duration(sband->band, 10, bitrate,
- erp, short_preamble, shift);
- }
- return cpu_to_le16(dur);
- }
- EXPORT_SYMBOL(ieee80211_ctstoself_duration);
- void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
- {
- struct ieee80211_sub_if_data *sdata;
- int n_acs = IEEE80211_NUM_ACS;
- if (local->ops->wake_tx_queue)
- return;
- if (local->hw.queues < IEEE80211_NUM_ACS)
- n_acs = 1;
- list_for_each_entry_rcu(sdata, &local->interfaces, list) {
- int ac;
- if (!sdata->dev)
- continue;
- if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
- local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
- continue;
- for (ac = 0; ac < n_acs; ac++) {
- 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);
- }
- }
- }
- static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
- enum queue_stop_reason reason,
- bool refcounted)
- {
- struct ieee80211_local *local = hw_to_local(hw);
- trace_wake_queue(local, queue, reason);
- if (WARN_ON(queue >= hw->queues))
- return;
- if (!test_bit(reason, &local->queue_stop_reasons[queue]))
- return;
- if (!refcounted) {
- local->q_stop_reasons[queue][reason] = 0;
- } else {
- local->q_stop_reasons[queue][reason]--;
- if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
- local->q_stop_reasons[queue][reason] = 0;
- }
- if (local->q_stop_reasons[queue][reason] == 0)
- __clear_bit(reason, &local->queue_stop_reasons[queue]);
- if (local->queue_stop_reasons[queue] != 0)
- /* someone still has this queue stopped */
- return;
- if (skb_queue_empty(&local->pending[queue])) {
- rcu_read_lock();
- ieee80211_propagate_queue_wake(local, queue);
- rcu_read_unlock();
- } else
- tasklet_schedule(&local->tx_pending_tasklet);
- }
- void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
- enum queue_stop_reason reason,
- bool refcounted)
- {
- 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, refcounted);
- 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,
- false);
- }
- EXPORT_SYMBOL(ieee80211_wake_queue);
- static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
- enum queue_stop_reason reason,
- bool refcounted)
- {
- struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_sub_if_data *sdata;
- int n_acs = IEEE80211_NUM_ACS;
- trace_stop_queue(local, queue, reason);
- if (WARN_ON(queue >= hw->queues))
- return;
- if (!refcounted)
- local->q_stop_reasons[queue][reason] = 1;
- else
- local->q_stop_reasons[queue][reason]++;
- if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
- return;
- if (local->ops->wake_tx_queue)
- return;
- if (local->hw.queues < IEEE80211_NUM_ACS)
- n_acs = 1;
- rcu_read_lock();
- list_for_each_entry_rcu(sdata, &local->interfaces, list) {
- int ac;
- if (!sdata->dev)
- continue;
- for (ac = 0; ac < n_acs; ac++) {
- if (sdata->vif.hw_queue[ac] == queue ||
- sdata->vif.cab_queue == queue)
- netif_stop_subqueue(sdata->dev, ac);
- }
- }
- rcu_read_unlock();
- }
- void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
- enum queue_stop_reason reason,
- bool refcounted)
- {
- 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, refcounted);
- 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,
- false);
- }
- EXPORT_SYMBOL(ieee80211_stop_queue);
- void ieee80211_add_pending_skb(struct ieee80211_local *local,
- struct sk_buff *skb)
- {
- struct ieee80211_hw *hw = &local->hw;
- unsigned long flags;
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- int queue = info->hw_queue;
- if (WARN_ON(!info->control.vif)) {
- ieee80211_free_txskb(&local->hw, skb);
- return;
- }
- spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
- __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
- false);
- __skb_queue_tail(&local->pending[queue], skb);
- __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
- false);
- spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
- }
- void ieee80211_add_pending_skbs(struct ieee80211_local *local,
- struct sk_buff_head *skbs)
- {
- struct ieee80211_hw *hw = &local->hw;
- struct sk_buff *skb;
- unsigned long flags;
- int queue, i;
- spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
- while ((skb = skb_dequeue(skbs))) {
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- if (WARN_ON(!info->control.vif)) {
- ieee80211_free_txskb(&local->hw, skb);
- continue;
- }
- queue = info->hw_queue;
- __ieee80211_stop_queue(hw, queue,
- IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
- false);
- __skb_queue_tail(&local->pending[queue], skb);
- }
- for (i = 0; i < hw->queues; i++)
- __ieee80211_wake_queue(hw, i,
- IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
- false);
- spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
- }
- void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
- unsigned long queues,
- enum queue_stop_reason reason,
- bool refcounted)
- {
- struct ieee80211_local *local = hw_to_local(hw);
- unsigned long flags;
- int i;
- spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
- for_each_set_bit(i, &queues, hw->queues)
- __ieee80211_stop_queue(hw, i, reason, refcounted);
- spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
- }
- void ieee80211_stop_queues(struct ieee80211_hw *hw)
- {
- ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
- IEEE80211_QUEUE_STOP_REASON_DRIVER,
- false);
- }
- EXPORT_SYMBOL(ieee80211_stop_queues);
- int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
- {
- struct ieee80211_local *local = hw_to_local(hw);
- unsigned long flags;
- int ret;
- if (WARN_ON(queue >= hw->queues))
- return true;
- spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
- ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
- &local->queue_stop_reasons[queue]);
- spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
- return ret;
- }
- EXPORT_SYMBOL(ieee80211_queue_stopped);
- void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
- unsigned long queues,
- enum queue_stop_reason reason,
- bool refcounted)
- {
- struct ieee80211_local *local = hw_to_local(hw);
- unsigned long flags;
- int i;
- spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
- for_each_set_bit(i, &queues, hw->queues)
- __ieee80211_wake_queue(hw, i, reason, refcounted);
- spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
- }
- void ieee80211_wake_queues(struct ieee80211_hw *hw)
- {
- ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
- IEEE80211_QUEUE_STOP_REASON_DRIVER,
- false);
- }
- EXPORT_SYMBOL(ieee80211_wake_queues);
- static unsigned int
- ieee80211_get_vif_queues(struct ieee80211_local *local,
- struct ieee80211_sub_if_data *sdata)
- {
- unsigned int queues;
- if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
- int ac;
- queues = 0;
- for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
- queues |= BIT(sdata->vif.hw_queue[ac]);
- if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
- queues |= BIT(sdata->vif.cab_queue);
- } else {
- /* all queues */
- queues = BIT(local->hw.queues) - 1;
- }
- return queues;
- }
- void __ieee80211_flush_queues(struct ieee80211_local *local,
- struct ieee80211_sub_if_data *sdata,
- unsigned int queues, bool drop)
- {
- if (!local->ops->flush)
- return;
- /*
- * If no queue was set, or if the HW doesn't support
- * IEEE80211_HW_QUEUE_CONTROL - flush all queues
- */
- if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
- queues = ieee80211_get_vif_queues(local, sdata);
- ieee80211_stop_queues_by_reason(&local->hw, queues,
- IEEE80211_QUEUE_STOP_REASON_FLUSH,
- false);
- drv_flush(local, sdata, queues, drop);
- ieee80211_wake_queues_by_reason(&local->hw, queues,
- IEEE80211_QUEUE_STOP_REASON_FLUSH,
- false);
- }
- void ieee80211_flush_queues(struct ieee80211_local *local,
- struct ieee80211_sub_if_data *sdata, bool drop)
- {
- __ieee80211_flush_queues(local, sdata, 0, drop);
- }
- void ieee80211_stop_vif_queues(struct ieee80211_local *local,
- struct ieee80211_sub_if_data *sdata,
- enum queue_stop_reason reason)
- {
- ieee80211_stop_queues_by_reason(&local->hw,
- ieee80211_get_vif_queues(local, sdata),
- reason, true);
- }
- void ieee80211_wake_vif_queues(struct ieee80211_local *local,
- struct ieee80211_sub_if_data *sdata,
- enum queue_stop_reason reason)
- {
- ieee80211_wake_queues_by_reason(&local->hw,
- ieee80211_get_vif_queues(local, sdata),
- reason, true);
- }
- static void __iterate_interfaces(struct ieee80211_local *local,
- u32 iter_flags,
- void (*iterator)(void *data, u8 *mac,
- struct ieee80211_vif *vif),
- void *data)
- {
- struct ieee80211_sub_if_data *sdata;
- bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
- list_for_each_entry_rcu(sdata, &local->interfaces, list) {
- switch (sdata->vif.type) {
- case NL80211_IFTYPE_MONITOR:
- if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
- continue;
- break;
- case NL80211_IFTYPE_AP_VLAN:
- continue;
- default:
- break;
- }
- if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
- active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
- continue;
- if (ieee80211_sdata_running(sdata) || !active_only)
- iterator(data, sdata->vif.addr,
- &sdata->vif);
- }
- sdata = rcu_dereference_check(local->monitor_sdata,
- lockdep_is_held(&local->iflist_mtx) ||
- lockdep_rtnl_is_held());
- if (sdata &&
- (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
- sdata->flags & IEEE80211_SDATA_IN_DRIVER))
- iterator(data, sdata->vif.addr, &sdata->vif);
- }
- void ieee80211_iterate_interfaces(
- struct ieee80211_hw *hw, u32 iter_flags,
- void (*iterator)(void *data, u8 *mac,
- struct ieee80211_vif *vif),
- void *data)
- {
- struct ieee80211_local *local = hw_to_local(hw);
- mutex_lock(&local->iflist_mtx);
- __iterate_interfaces(local, iter_flags, iterator, data);
- mutex_unlock(&local->iflist_mtx);
- }
- EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
- void ieee80211_iterate_active_interfaces_atomic(
- struct ieee80211_hw *hw, u32 iter_flags,
- void (*iterator)(void *data, u8 *mac,
- struct ieee80211_vif *vif),
- void *data)
- {
- struct ieee80211_local *local = hw_to_local(hw);
- rcu_read_lock();
- __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
- iterator, data);
- rcu_read_unlock();
- }
- EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
- void ieee80211_iterate_active_interfaces_rtnl(
- struct ieee80211_hw *hw, u32 iter_flags,
- void (*iterator)(void *data, u8 *mac,
- struct ieee80211_vif *vif),
- void *data)
- {
- struct ieee80211_local *local = hw_to_local(hw);
- ASSERT_RTNL();
- __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
- iterator, data);
- }
- EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
- static void __iterate_stations(struct ieee80211_local *local,
- void (*iterator)(void *data,
- struct ieee80211_sta *sta),
- void *data)
- {
- struct sta_info *sta;
- list_for_each_entry_rcu(sta, &local->sta_list, list) {
- if (!sta->uploaded)
- continue;
- iterator(data, &sta->sta);
- }
- }
- void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
- void (*iterator)(void *data,
- struct ieee80211_sta *sta),
- void *data)
- {
- struct ieee80211_local *local = hw_to_local(hw);
- rcu_read_lock();
- __iterate_stations(local, iterator, data);
- rcu_read_unlock();
- }
- EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
- struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
- {
- struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
- if (!ieee80211_sdata_running(sdata) ||
- !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
- return NULL;
- return &sdata->vif;
- }
- EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
- struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
- {
- struct ieee80211_sub_if_data *sdata;
- if (!vif)
- return NULL;
- sdata = vif_to_sdata(vif);
- if (!ieee80211_sdata_running(sdata) ||
- !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
- return NULL;
- return &sdata->wdev;
- }
- EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
- /*
- * Nothing should have been stuffed into the workqueue during
- * the suspend->resume cycle. Since we can't check each caller
- * of this function if we are already quiescing / suspended,
- * check here and don't WARN since this can actually happen when
- * the rx path (for example) is racing against __ieee80211_suspend
- * and suspending / quiescing was set after the rx path checked
- * them.
- */
- static bool ieee80211_can_queue_work(struct ieee80211_local *local)
- {
- if (local->quiescing || (local->suspended && !local->resuming)) {
- pr_warn("queueing ieee80211 work while going to suspend\n");
- return false;
- }
- 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);
- u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
- struct ieee802_11_elems *elems,
- u64 filter, u32 crc)
- {
- size_t left = len;
- const u8 *pos = start;
- bool calc_crc = filter != 0;
- DECLARE_BITMAP(seen_elems, 256);
- const u8 *ie;
- bitmap_zero(seen_elems, 256);
- memset(elems, 0, sizeof(*elems));
- elems->ie_start = start;
- elems->total_len = len;
- while (left >= 2) {
- u8 id, elen;
- bool elem_parse_failed;
- id = *pos++;
- elen = *pos++;
- left -= 2;
- if (elen > left) {
- elems->parse_error = true;
- break;
- }
- switch (id) {
- case WLAN_EID_SSID:
- case WLAN_EID_SUPP_RATES:
- case WLAN_EID_FH_PARAMS:
- case WLAN_EID_DS_PARAMS:
- case WLAN_EID_CF_PARAMS:
- case WLAN_EID_TIM:
- case WLAN_EID_IBSS_PARAMS:
- case WLAN_EID_CHALLENGE:
- case WLAN_EID_RSN:
- case WLAN_EID_ERP_INFO:
- case WLAN_EID_EXT_SUPP_RATES:
- case WLAN_EID_HT_CAPABILITY:
- case WLAN_EID_HT_OPERATION:
- case WLAN_EID_VHT_CAPABILITY:
- case WLAN_EID_VHT_OPERATION:
- case WLAN_EID_MESH_ID:
- case WLAN_EID_MESH_CONFIG:
- case WLAN_EID_PEER_MGMT:
- case WLAN_EID_PREQ:
- case WLAN_EID_PREP:
- case WLAN_EID_PERR:
- case WLAN_EID_RANN:
- case WLAN_EID_CHANNEL_SWITCH:
- case WLAN_EID_EXT_CHANSWITCH_ANN:
- case WLAN_EID_COUNTRY:
- case WLAN_EID_PWR_CONSTRAINT:
- case WLAN_EID_TIMEOUT_INTERVAL:
- case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
- case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
- case WLAN_EID_CHAN_SWITCH_PARAM:
- case WLAN_EID_EXT_CAPABILITY:
- case WLAN_EID_CHAN_SWITCH_TIMING:
- case WLAN_EID_LINK_ID:
- /*
- * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
- * that if the content gets bigger it might be needed more than once
- */
- if (test_bit(id, seen_elems)) {
- elems->parse_error = true;
- left -= elen;
- pos += elen;
- continue;
- }
- break;
- }
- if (calc_crc && id < 64 && (filter & (1ULL << id)))
- crc = crc32_be(crc, pos - 2, elen + 2);
- elem_parse_failed = false;
- switch (id) {
- case WLAN_EID_LINK_ID:
- if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
- elem_parse_failed = true;
- break;
- }
- elems->lnk_id = (void *)(pos - 2);
- break;
- case WLAN_EID_CHAN_SWITCH_TIMING:
- if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
- elem_parse_failed = true;
- break;
- }
- elems->ch_sw_timing = (void *)pos;
- break;
- case WLAN_EID_EXT_CAPABILITY:
- elems->ext_capab = pos;
- elems->ext_capab_len = elen;
- break;
- 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_DS_PARAMS:
- if (elen >= 1)
- elems->ds_params = pos;
- else
- elem_parse_failed = true;
- break;
- case WLAN_EID_TIM:
- if (elen >= sizeof(struct ieee80211_tim_ie)) {
- elems->tim = (void *)pos;
- elems->tim_len = elen;
- } else
- elem_parse_failed = true;
- 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 (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:
- if (elen >= 1)
- elems->erp_info = pos;
- else
- elem_parse_failed = true;
- 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;
- else
- elem_parse_failed = true;
- break;
- case WLAN_EID_HT_OPERATION:
- if (elen >= sizeof(struct ieee80211_ht_operation))
- elems->ht_operation = (void *)pos;
- else
- elem_parse_failed = true;
- break;
- case WLAN_EID_VHT_CAPABILITY:
- if (elen >= sizeof(struct ieee80211_vht_cap))
- elems->vht_cap_elem = (void *)pos;
- else
- elem_parse_failed = true;
- break;
- case WLAN_EID_VHT_OPERATION:
- if (elen >= sizeof(struct ieee80211_vht_operation))
- elems->vht_operation = (void *)pos;
- else
- elem_parse_failed = true;
- break;
- case WLAN_EID_OPMODE_NOTIF:
- if (elen > 0)
- elems->opmode_notif = pos;
- else
- elem_parse_failed = true;
- 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;
- else
- elem_parse_failed = true;
- break;
- case WLAN_EID_PEER_MGMT:
- elems->peering = pos;
- elems->peering_len = elen;
- break;
- case WLAN_EID_MESH_AWAKE_WINDOW:
- if (elen >= 2)
- elems->awake_window = (void *)pos;
- 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;
- else
- elem_parse_failed = true;
- break;
- case WLAN_EID_CHANNEL_SWITCH:
- if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
- elem_parse_failed = true;
- break;
- }
- elems->ch_switch_ie = (void *)pos;
- break;
- case WLAN_EID_EXT_CHANSWITCH_ANN:
- if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
- elem_parse_failed = true;
- break;
- }
- elems->ext_chansw_ie = (void *)pos;
- break;
- case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
- if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
- elem_parse_failed = true;
- break;
- }
- elems->sec_chan_offs = (void *)pos;
- break;
- case WLAN_EID_CHAN_SWITCH_PARAM:
- if (elen !=
- sizeof(*elems->mesh_chansw_params_ie)) {
- elem_parse_failed = true;
- break;
- }
- elems->mesh_chansw_params_ie = (void *)pos;
- break;
- case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
- if (!action ||
- elen != sizeof(*elems->wide_bw_chansw_ie)) {
- elem_parse_failed = true;
- break;
- }
- elems->wide_bw_chansw_ie = (void *)pos;
- break;
- case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
- if (action) {
- elem_parse_failed = true;
- break;
- }
- /*
- * This is a bit tricky, but as we only care about
- * the wide bandwidth channel switch element, so
- * just parse it out manually.
- */
- ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
- pos, elen);
- if (ie) {
- if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
- elems->wide_bw_chansw_ie =
- (void *)(ie + 2);
- else
- elem_parse_failed = true;
- }
- break;
- case WLAN_EID_COUNTRY:
- elems->country_elem = pos;
- elems->country_elem_len = elen;
- break;
- case WLAN_EID_PWR_CONSTRAINT:
- if (elen != 1) {
- elem_parse_failed = true;
- break;
- }
- elems->pwr_constr_elem = pos;
- break;
- case WLAN_EID_CISCO_VENDOR_SPECIFIC:
- /* Lots of different options exist, but we only care
- * about the Dynamic Transmit Power Control element.
- * First check for the Cisco OUI, then for the DTPC
- * tag (0x00).
- */
- if (elen < 4) {
- elem_parse_failed = true;
- break;
- }
- if (pos[0] != 0x00 || pos[1] != 0x40 ||
- pos[2] != 0x96 || pos[3] != 0x00)
- break;
- if (elen != 6) {
- elem_parse_failed = true;
- break;
- }
- if (calc_crc)
- crc = crc32_be(crc, pos - 2, elen + 2);
- elems->cisco_dtpc_elem = pos;
- break;
- case WLAN_EID_TIMEOUT_INTERVAL:
- if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
- elems->timeout_int = (void *)pos;
- else
- elem_parse_failed = true;
- break;
- default:
- break;
- }
- if (elem_parse_failed)
- elems->parse_error = true;
- else
- __set_bit(id, seen_elems);
- left -= elen;
- pos += elen;
- }
- if (left != 0)
- elems->parse_error = true;
- return crc;
- }
- void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
- bool bss_notify, bool enable_qos)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_tx_queue_params qparam;
- struct ieee80211_chanctx_conf *chanctx_conf;
- int ac;
- bool use_11b;
- bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
- int aCWmin, aCWmax;
- if (!local->ops->conf_tx)
- return;
- if (local->hw.queues < IEEE80211_NUM_ACS)
- return;
- memset(&qparam, 0, sizeof(qparam));
- rcu_read_lock();
- chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
- use_11b = (chanctx_conf &&
- chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
- !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
- rcu_read_unlock();
- is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
- /* Set defaults according to 802.11-2007 Table 7-37 */
- aCWmax = 1023;
- if (use_11b)
- aCWmin = 31;
- else
- aCWmin = 15;
- /* Confiure old 802.11b/g medium access rules. */
- qparam.cw_max = aCWmax;
- qparam.cw_min = aCWmin;
- qparam.txop = 0;
- qparam.aifs = 2;
- for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
- /* Update if QoS is enabled. */
- if (enable_qos) {
- switch (ac) {
- case IEEE80211_AC_BK:
- qparam.cw_max = aCWmax;
- qparam.cw_min = aCWmin;
- qparam.txop = 0;
- if (is_ocb)
- qparam.aifs = 9;
- else
- 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;
- if (is_ocb)
- qparam.aifs = 6;
- else
- qparam.aifs = 3;
- break;
- case IEEE80211_AC_VI:
- qparam.cw_max = aCWmin;
- qparam.cw_min = (aCWmin + 1) / 2 - 1;
- if (is_ocb)
- qparam.txop = 0;
- else if (use_11b)
- qparam.txop = 6016/32;
- else
- qparam.txop = 3008/32;
- if (is_ocb)
- qparam.aifs = 3;
- else
- qparam.aifs = 2;
- break;
- case IEEE80211_AC_VO:
- qparam.cw_max = (aCWmin + 1) / 2 - 1;
- qparam.cw_min = (aCWmin + 1) / 4 - 1;
- if (is_ocb)
- qparam.txop = 0;
- else if (use_11b)
- qparam.txop = 3264/32;
- else
- qparam.txop = 1504/32;
- qparam.aifs = 2;
- break;
- }
- }
- qparam.uapsd = false;
- sdata->tx_conf[ac] = qparam;
- drv_conf_tx(local, sdata, ac, &qparam);
- }
- if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
- sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
- sdata->vif.type != NL80211_IFTYPE_NAN) {
- sdata->vif.bss_conf.qos = enable_qos;
- if (bss_notify)
- ieee80211_bss_info_change_notify(sdata,
- BSS_CHANGED_QOS);
- }
- }
- void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
- u16 transaction, u16 auth_alg, u16 status,
- const u8 *extra, size_t extra_len, const u8 *da,
- const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
- u32 tx_flags)
- {
- struct ieee80211_local *local = sdata->local;
- struct sk_buff *skb;
- struct ieee80211_mgmt *mgmt;
- int err;
- /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
- skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
- 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
- if (!skb)
- return;
- skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
- 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);
- memcpy(mgmt->da, da, ETH_ALEN);
- memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
- 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(status);
- if (extra)
- memcpy(skb_put(skb, extra_len), extra, extra_len);
- 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);
- }
- IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
- tx_flags;
- ieee80211_tx_skb(sdata, skb);
- }
- 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);
- }
- }
- static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
- u8 *buffer, size_t buffer_len,
- const u8 *ie, size_t ie_len,
- enum nl80211_band band,
- u32 rate_mask,
- struct cfg80211_chan_def *chandef,
- size_t *offset)
- {
- struct ieee80211_supported_band *sband;
- u8 *pos = buffer, *end = buffer + buffer_len;
- size_t noffset;
- int supp_rates_len, i;
- u8 rates[32];
- int num_rates;
- int ext_rates_len;
- int shift;
- u32 rate_flags;
- bool have_80mhz = false;
- *offset = 0;
- sband = local->hw.wiphy->bands[band];
- if (WARN_ON_ONCE(!sband))
- return 0;
- rate_flags = ieee80211_chandef_rate_flags(chandef);
- shift = ieee80211_chandef_get_shift(chandef);
- num_rates = 0;
- for (i = 0; i < sband->n_bitrates; i++) {
- if ((BIT(i) & rate_mask) == 0)
- continue; /* skip rate */
- if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
- continue;
- rates[num_rates++] =
- (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
- (1 << shift) * 5);
- }
- supp_rates_len = min_t(int, num_rates, 8);
- if (end - pos < 2 + supp_rates_len)
- goto out_err;
- *pos++ = WLAN_EID_SUPP_RATES;
- *pos++ = supp_rates_len;
- memcpy(pos, rates, supp_rates_len);
- pos += supp_rates_len;
- /* 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);
- if (end - pos < noffset - *offset)
- goto out_err;
- memcpy(pos, ie + *offset, noffset - *offset);
- pos += noffset - *offset;
- *offset = noffset;
- }
- ext_rates_len = num_rates - supp_rates_len;
- if (ext_rates_len > 0) {
- if (end - pos < 2 + ext_rates_len)
- goto out_err;
- *pos++ = WLAN_EID_EXT_SUPP_RATES;
- *pos++ = ext_rates_len;
- memcpy(pos, rates + supp_rates_len, ext_rates_len);
- pos += ext_rates_len;
- }
- if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
- if (end - pos < 3)
- goto out_err;
- *pos++ = WLAN_EID_DS_PARAMS;
- *pos++ = 1;
- *pos++ = ieee80211_frequency_to_channel(
- chandef->chan->center_freq);
- }
- /* 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);
- if (end - pos < noffset - *offset)
- goto out_err;
- memcpy(pos, ie + *offset, noffset - *offset);
- pos += noffset - *offset;
- *offset = noffset;
- }
- if (sband->ht_cap.ht_supported) {
- if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
- goto out_err;
- pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
- sband->ht_cap.cap);
- }
- /*
- * If adding more here, adjust code in main.c
- * that calculates local->scan_ies_len.
- */
- /* insert custom IEs that go before VHT */
- if (ie && ie_len) {
- static const u8 before_vht[] = {
- WLAN_EID_SSID,
- WLAN_EID_SUPP_RATES,
- WLAN_EID_REQUEST,
- WLAN_EID_EXT_SUPP_RATES,
- WLAN_EID_DS_PARAMS,
- WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
- WLAN_EID_HT_CAPABILITY,
- WLAN_EID_BSS_COEX_2040,
- WLAN_EID_EXT_CAPABILITY,
- WLAN_EID_SSID_LIST,
- WLAN_EID_CHANNEL_USAGE,
- WLAN_EID_INTERWORKING,
- /* mesh ID can't happen here */
- /* 60 GHz can't happen here right now */
- };
- noffset = ieee80211_ie_split(ie, ie_len,
- before_vht, ARRAY_SIZE(before_vht),
- *offset);
- if (end - pos < noffset - *offset)
- goto out_err;
- memcpy(pos, ie + *offset, noffset - *offset);
- pos += noffset - *offset;
- *offset = noffset;
- }
- /* Check if any channel in this sband supports at least 80 MHz */
- 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 (sband->vht_cap.vht_supported && have_80mhz) {
- if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
- goto out_err;
- pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
- sband->vht_cap.cap);
- }
- return pos - buffer;
- out_err:
- WARN_ONCE(1, "not enough space for preq IEs\n");
- return pos - buffer;
- }
- int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
- size_t buffer_len,
- struct ieee80211_scan_ies *ie_desc,
- const u8 *ie, size_t ie_len,
- u8 bands_used, u32 *rate_masks,
- struct cfg80211_chan_def *chandef)
- {
- size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
- int i;
- memset(ie_desc, 0, sizeof(*ie_desc));
- for (i = 0; i < NUM_NL80211_BANDS; i++) {
- if (bands_used & BIT(i)) {
- pos += ieee80211_build_preq_ies_band(local,
- buffer + pos,
- buffer_len - pos,
- ie, ie_len, i,
- rate_masks[i],
- chandef,
- &custom_ie_offset);
- ie_desc->ies[i] = buffer + old_pos;
- ie_desc->len[i] = pos - old_pos;
- old_pos = pos;
- }
- }
- /* add any remaining custom IEs */
- if (ie && ie_len) {
- if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
- "not enough space for preq custom IEs\n"))
- return pos;
- memcpy(buffer + pos, ie + custom_ie_offset,
- ie_len - custom_ie_offset);
- ie_desc->common_ies = buffer + pos;
- ie_desc->common_ie_len = ie_len - custom_ie_offset;
- pos += ie_len - custom_ie_offset;
- }
- return pos;
- };
- struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
- const u8 *src, const u8 *dst,
- u32 ratemask,
- struct ieee80211_channel *chan,
- const u8 *ssid, size_t ssid_len,
- const u8 *ie, size_t ie_len,
- bool directed)
- {
- struct ieee80211_local *local = sdata->local;
- struct cfg80211_chan_def chandef;
- struct sk_buff *skb;
- struct ieee80211_mgmt *mgmt;
- int ies_len;
- u32 rate_masks[NUM_NL80211_BANDS] = {};
- struct ieee80211_scan_ies dummy_ie_desc;
- /*
- * 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.
- */
- chandef.width = sdata->vif.bss_conf.chandef.width;
- if (directed)
- chandef.chan = NULL;
- else
- chandef.chan = chan;
- skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
- 100 + ie_len);
- if (!skb)
- return NULL;
- rate_masks[chan->band] = ratemask;
- ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
- skb_tailroom(skb), &dummy_ie_desc,
- ie, ie_len, BIT(chan->band),
- rate_masks, &chandef);
- skb_put(skb, ies_len);
- if (dst) {
- mgmt = (struct ieee80211_mgmt *) skb->data;
- memcpy(mgmt->da, dst, ETH_ALEN);
- memcpy(mgmt->bssid, dst, ETH_ALEN);
- }
- IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
- return skb;
- }
- void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
- const u8 *src, const u8 *dst,
- const u8 *ssid, size_t ssid_len,
- const u8 *ie, size_t ie_len,
- u32 ratemask, bool directed, u32 tx_flags,
- struct ieee80211_channel *channel, bool scan)
- {
- struct sk_buff *skb;
- skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
- ssid, ssid_len,
- ie, ie_len, directed);
- if (skb) {
- IEEE80211_SKB_CB(skb)->flags |= tx_flags;
- if (scan)
- ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
- else
- ieee80211_tx_skb(sdata, skb);
- }
- }
- u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
- struct ieee802_11_elems *elems,
- enum nl80211_band band, u32 *basic_rates)
- {
- struct ieee80211_supported_band *sband;
- size_t num_rates;
- u32 supp_rates, rate_flags;
- int i, j, shift;
- sband = sdata->local->hw.wiphy->bands[band];
- if (WARN_ON(!sband))
- return 1;
- rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
- shift = ieee80211_vif_get_shift(&sdata->vif);
- 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;
- bool is_basic;
- 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);
- is_basic = !!(rate & 0x80);
- if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
- continue;
- for (j = 0; j < num_rates; j++) {
- int brate;
- if ((rate_flags & sband->bitrates[j].flags)
- != rate_flags)
- continue;
- brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
- 1 << shift);
- if (brate == own_rate) {
- supp_rates |= BIT(j);
- if (basic_rates && is_basic)
- *basic_rates |= BIT(j);
- }
- }
- }
- return supp_rates;
- }
- void ieee80211_stop_device(struct ieee80211_local *local)
- {
- ieee80211_led_radio(local, false);
- ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
- cancel_work_sync(&local->reconfig_filter);
- flush_workqueue(local->workqueue);
- drv_stop(local);
- }
- static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
- bool aborted)
- {
- /* It's possible that we don't handle the scan completion in
- * time during suspend, so if it's still marked as completed
- * here, queue the work and flush it to clean things up.
- * Instead of calling the worker function directly here, we
- * really queue it to avoid potential races with other flows
- * scheduling the same work.
- */
- if (test_bit(SCAN_COMPLETED, &local->scanning)) {
- /* If coming from reconfiguration failure, abort the scan so
- * we don't attempt to continue a partial HW scan - which is
- * possible otherwise if (e.g.) the 2.4 GHz portion was the
- * completed scan, and a 5 GHz portion is still pending.
- */
- if (aborted)
- set_bit(SCAN_ABORTED, &local->scanning);
- ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
- flush_delayed_work(&local->scan_work);
- }
- }
- static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
- {
- struct ieee80211_sub_if_data *sdata;
- struct ieee80211_chanctx *ctx;
- /*
- * We get here if during resume the device can't be restarted properly.
- * We might also get here if this happens during HW reset, which is a
- * slightly different situation and we need to drop all connections in
- * the latter case.
- *
- * Ask cfg80211 to turn off all interfaces, this will result in more
- * warnings but at least we'll then get into a clean stopped state.
- */
- local->resuming = false;
- local->suspended = false;
- local->in_reconfig = false;
- ieee80211_flush_completed_scan(local, true);
- /* scheduled scan clearly can't be running any more, but tell
- * cfg80211 and clear local state
- */
- ieee80211_sched_scan_end(local);
- list_for_each_entry(sdata, &local->interfaces, list)
- sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
- /* Mark channel contexts as not being in the driver any more to avoid
- * removing them from the driver during the shutdown process...
- */
- mutex_lock(&local->chanctx_mtx);
- list_for_each_entry(ctx, &local->chanctx_list, list)
- ctx->driver_present = false;
- mutex_unlock(&local->chanctx_mtx);
- cfg80211_shutdown_all_interfaces(local->hw.wiphy);
- }
- static void ieee80211_assign_chanctx(struct ieee80211_local *local,
- struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_chanctx_conf *conf;
- struct ieee80211_chanctx *ctx;
- if (!local->use_chanctx)
- return;
- mutex_lock(&local->chanctx_mtx);
- conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
- lockdep_is_held(&local->chanctx_mtx));
- if (conf) {
- ctx = container_of(conf, struct ieee80211_chanctx, conf);
- drv_assign_vif_chanctx(local, sdata, ctx);
- }
- mutex_unlock(&local->chanctx_mtx);
- }
- static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_local *local = sdata->local;
- struct sta_info *sta;
- /* add STAs back */
- mutex_lock(&local->sta_mtx);
- list_for_each_entry(sta, &local->sta_list, list) {
- enum ieee80211_sta_state state;
- if (!sta->uploaded || sta->sdata != sdata)
- 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);
- }
- static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
- {
- struct cfg80211_nan_func *func, **funcs;
- int res, id, i = 0;
- res = drv_start_nan(sdata->local, sdata,
- &sdata->u.nan.conf);
- if (WARN_ON(res))
- return res;
- funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
- sizeof(*funcs), GFP_KERNEL);
- if (!funcs)
- return -ENOMEM;
- /* Add all the functions:
- * This is a little bit ugly. We need to call a potentially sleeping
- * callback for each NAN function, so we can't hold the spinlock.
- */
- spin_lock_bh(&sdata->u.nan.func_lock);
- idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
- funcs[i++] = func;
- spin_unlock_bh(&sdata->u.nan.func_lock);
- for (i = 0; funcs[i]; i++) {
- res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
- if (WARN_ON(res))
- ieee80211_nan_func_terminated(&sdata->vif,
- funcs[i]->instance_id,
- NL80211_NAN_FUNC_TERM_REASON_ERROR,
- GFP_KERNEL);
- }
- kfree(funcs);
- return 0;
- }
- int ieee80211_reconfig(struct ieee80211_local *local)
- {
- struct ieee80211_hw *hw = &local->hw;
- struct ieee80211_sub_if_data *sdata;
- struct ieee80211_chanctx *ctx;
- struct sta_info *sta;
- int res, i;
- bool reconfig_due_to_wowlan = false;
- struct ieee80211_sub_if_data *sched_scan_sdata;
- struct cfg80211_sched_scan_request *sched_scan_req;
- bool sched_scan_stopped = false;
- bool suspended = local->suspended;
- /* nothing to do if HW shouldn't run */
- if (!local->open_count)
- goto wake_up;
- #ifdef CONFIG_PM
- if (suspended)
- local->resuming = true;
- if (local->wowlan) {
- /*
- * In the wowlan case, both mac80211 and the device
- * are functional when the resume op is called, so
- * clear local->suspended so the device could operate
- * normally (e.g. pass rx frames).
- */
- local->suspended = false;
- res = drv_resume(local);
- local->wowlan = false;
- 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.
- * restore local->suspended in this case.
- */
- reconfig_due_to_wowlan = true;
- local->suspended = true;
- }
- #endif
- /*
- * In case of hw_restart during suspend (without wowlan),
- * cancel restart work, as we are reconfiguring the device
- * anyway.
- * Note that restart_work is scheduled on a frozen workqueue,
- * so we can't deadlock in this case.
- */
- if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
- cancel_work_sync(&local->restart_work);
- local->started = false;
- /*
- * 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) {
- if (suspended)
- WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
- else
- WARN(1, "Hardware became unavailable during restart.\n");
- ieee80211_handle_reconfig_failure(local);
- return res;
- }
- /* 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);
- ieee80211_led_radio(local, true);
- ieee80211_mod_tpt_led_trig(local,
- IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
- /* add interfaces */
- sdata = rtnl_dereference(local->monitor_sdata);
- if (sdata) {
- /* in HW restart it exists already */
- WARN_ON(local->resuming);
- res = drv_add_interface(local, sdata);
- if (WARN_ON(res)) {
- RCU_INIT_POINTER(local->monitor_sdata, NULL);
- synchronize_net();
- kfree(sdata);
- }
- }
- 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)) {
- res = drv_add_interface(local, sdata);
- if (WARN_ON(res))
- break;
- }
- }
- /* If adding any of the interfaces failed above, roll back and
- * report failure.
- */
- if (res) {
- list_for_each_entry_continue_reverse(sdata, &local->interfaces,
- list)
- if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
- sdata->vif.type != NL80211_IFTYPE_MONITOR &&
- ieee80211_sdata_running(sdata))
- drv_remove_interface(local, sdata);
- ieee80211_handle_reconfig_failure(local);
- return res;
- }
- /* add channel contexts */
- if (local->use_chanctx) {
- mutex_lock(&local->chanctx_mtx);
- list_for_each_entry(ctx, &local->chanctx_list, list)
- if (ctx->replace_state !=
- IEEE80211_CHANCTX_REPLACES_OTHER)
- WARN_ON(drv_add_chanctx(local, ctx));
- mutex_unlock(&local->chanctx_mtx);
- sdata = rtnl_dereference(local->monitor_sdata);
- if (sdata && ieee80211_sdata_running(sdata))
- ieee80211_assign_chanctx(local, sdata);
- }
- /* 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) {
- u32 changed;
- if (!ieee80211_sdata_running(sdata))
- continue;
- ieee80211_assign_chanctx(local, sdata);
- switch (sdata->vif.type) {
- case NL80211_IFTYPE_AP_VLAN:
- case NL80211_IFTYPE_MONITOR:
- break;
- default:
- ieee80211_reconfig_stations(sdata);
- /* fall through */
- case NL80211_IFTYPE_AP: /* AP stations are handled later */
- for (i = 0; i < IEEE80211_NUM_ACS; i++)
- drv_conf_tx(local, sdata, i,
- &sdata->tx_conf[i]);
- break;
- }
- /* 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 |
- BSS_CHANGED_CQM |
- BSS_CHANGED_QOS |
- BSS_CHANGED_IDLE |
- BSS_CHANGED_TXPOWER;
- if (sdata->vif.mu_mimo_owner)
- changed |= BSS_CHANGED_MU_GROUPS;
- switch (sdata->vif.type) {
- case NL80211_IFTYPE_STATION:
- changed |= BSS_CHANGED_ASSOC |
- BSS_CHANGED_ARP_FILTER |
- BSS_CHANGED_PS;
- /* Re-send beacon info report to the driver */
- if (sdata->u.mgd.have_beacon)
- changed |= BSS_CHANGED_BEACON_INFO;
- sdata_lock(sdata);
- ieee80211_bss_info_change_notify(sdata, changed);
- sdata_unlock(sdata);
- break;
- case NL80211_IFTYPE_OCB:
- changed |= BSS_CHANGED_OCB;
- ieee80211_bss_info_change_notify(sdata, changed);
- break;
- case NL80211_IFTYPE_ADHOC:
- changed |= BSS_CHANGED_IBSS;
- /* fall through */
- case NL80211_IFTYPE_AP:
- changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
- if (sdata->vif.type == NL80211_IFTYPE_AP) {
- changed |= BSS_CHANGED_AP_PROBE_RESP;
- if (rcu_access_pointer(sdata->u.ap.beacon))
- drv_start_ap(local, sdata);
- }
- /* fall through */
- case NL80211_IFTYPE_MESH_POINT:
- if (sdata->vif.bss_conf.enable_beacon) {
- changed |= BSS_CHANGED_BEACON |
- BSS_CHANGED_BEACON_ENABLED;
- ieee80211_bss_info_change_notify(sdata, changed);
- }
- break;
- case NL80211_IFTYPE_NAN:
- res = ieee80211_reconfig_nan(sdata);
- if (res < 0) {
- ieee80211_handle_reconfig_failure(local);
- return res;
- }
- break;
- case NL80211_IFTYPE_WDS:
- case NL80211_IFTYPE_AP_VLAN:
- case NL80211_IFTYPE_MONITOR:
- case NL80211_IFTYPE_P2P_DEVICE:
- /* nothing to do */
- break;
- case NL80211_IFTYPE_UNSPECIFIED:
- case NUM_NL80211_IFTYPES:
- case NL80211_IFTYPE_P2P_CLIENT:
- case NL80211_IFTYPE_P2P_GO:
- WARN_ON(1);
- break;
- }
- }
- ieee80211_recalc_ps(local);
- /*
- * 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;
- if (!sdata->u.mgd.associated)
- continue;
- ieee80211_send_nullfunc(local, sdata, false);
- }
- }
- /* 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);
- /* add back keys */
- list_for_each_entry(sdata, &local->interfaces, list)
- ieee80211_reset_crypto_tx_tailroom(sdata);
- list_for_each_entry(sdata, &local->interfaces, list)
- if (ieee80211_sdata_running(sdata))
- ieee80211_enable_keys(sdata);
- /* Reconfigure sched scan if it was interrupted by FW restart */
- mutex_lock(&local->mtx);
- sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
- lockdep_is_held(&local->mtx));
- sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
- lockdep_is_held(&local->mtx));
- if (sched_scan_sdata && sched_scan_req)
- /*
- * Sched scan stopped, but we don't want to report it. Instead,
- * we're trying to reschedule. However, if more than one scan
- * plan was set, we cannot reschedule since we don't know which
- * scan plan was currently running (and some scan plans may have
- * already finished).
- */
- if (sched_scan_req->n_scan_plans > 1 ||
- __ieee80211_request_sched_scan_start(sched_scan_sdata,
- sched_scan_req)) {
- RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
- RCU_INIT_POINTER(local->sched_scan_req, NULL);
- sched_scan_stopped = true;
- }
- mutex_unlock(&local->mtx);
- if (sched_scan_stopped)
- cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
- wake_up:
- if (local->in_reconfig) {
- local->in_reconfig = false;
- barrier();
- /* Restart deferred ROCs */
- mutex_lock(&local->mtx);
- ieee80211_start_next_roc(local);
- mutex_unlock(&local->mtx);
- }
- if (local->monitors == local->open_count && local->monitors > 0)
- ieee80211_add_virtual_monitor(local);
- /*
- * 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.
- */
- if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
- mutex_lock(&local->sta_mtx);
- list_for_each_entry(sta, &local->sta_list, list) {
- if (!local->resuming)
- ieee80211_sta_tear_down_BA_sessions(
- sta, AGG_STOP_LOCAL_REQUEST);
- clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
- }
- mutex_unlock(&local->sta_mtx);
- }
- ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
- IEEE80211_QUEUE_STOP_REASON_SUSPEND,
- false);
- /*
- * If this is for hw restart things are still running.
- * We may want to change that later, however.
- */
- if (local->open_count && (!suspended || reconfig_due_to_wowlan))
- drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
- if (!suspended)
- return 0;
- #ifdef CONFIG_PM
- /* first set suspended false, then resuming */
- local->suspended = false;
- mb();
- local->resuming = false;
- ieee80211_flush_completed_scan(local, false);
- if (local->open_count && !reconfig_due_to_wowlan)
- drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
- list_for_each_entry(sdata, &local->interfaces, list) {
- if (!ieee80211_sdata_running(sdata))
- continue;
- if (sdata->vif.type == NL80211_IFTYPE_STATION)
- ieee80211_sta_restart(sdata);
- }
- mod_timer(&local->sta_cleanup, jiffies + 1);
- #else
- WARN_ON(1);
- #endif
- return 0;
- }
- 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);
- void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_chanctx_conf *chanctx_conf;
- struct ieee80211_chanctx *chanctx;
- mutex_lock(&local->chanctx_mtx);
- chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
- lockdep_is_held(&local->chanctx_mtx));
- /*
- * This function can be called from a work, thus it may be possible
- * that the chanctx_conf is removed (due to a disconnection, for
- * example).
- * So nothing should be done in such case.
- */
- if (!chanctx_conf)
- goto unlock;
- chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
- ieee80211_recalc_smps_chanctx(local, chanctx);
- unlock:
- mutex_unlock(&local->chanctx_mtx);
- }
- void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_chanctx_conf *chanctx_conf;
- struct ieee80211_chanctx *chanctx;
- mutex_lock(&local->chanctx_mtx);
- chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
- lockdep_is_held(&local->chanctx_mtx));
- if (WARN_ON_ONCE(!chanctx_conf))
- goto unlock;
- chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
- ieee80211_recalc_chanctx_min_def(local, chanctx);
- unlock:
- mutex_unlock(&local->chanctx_mtx);
- }
- 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;
- }
- 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);
- u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
- 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 */
- *pos++ = ht_cap->ampdu_factor |
- (ht_cap->ampdu_density <<
- IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
- /* MCS set */
- memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
- pos += sizeof(ht_cap->mcs);
- /* extended capabilities */
- pos += sizeof(__le16);
- /* BF capabilities */
- pos += sizeof(__le32);
- /* antenna selection */
- pos += sizeof(u8);
- return pos;
- }
- 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_cap);
- memset(pos, 0, sizeof(struct ieee80211_vht_cap));
- /* 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;
- }
- u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
- const struct cfg80211_chan_def *chandef,
- u16 prot_mode, bool rifs_mode)
- {
- struct ieee80211_ht_operation *ht_oper;
- /* Build HT Information */
- *pos++ = WLAN_EID_HT_OPERATION;
- *pos++ = sizeof(struct ieee80211_ht_operation);
- ht_oper = (struct ieee80211_ht_operation *)pos;
- ht_oper->primary_chan = ieee80211_frequency_to_channel(
- chandef->chan->center_freq);
- switch (chandef->width) {
- case NL80211_CHAN_WIDTH_160:
- case NL80211_CHAN_WIDTH_80P80:
- case NL80211_CHAN_WIDTH_80:
- case NL80211_CHAN_WIDTH_40:
- if (chandef->center_freq1 > chandef->chan->center_freq)
- ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
- else
- ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
- break;
- default:
- ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
- break;
- }
- if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
- chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
- chandef->width != NL80211_CHAN_WIDTH_20)
- ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
- if (rifs_mode)
- ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
- ht_oper->operation_mode = cpu_to_le16(prot_mode);
- ht_oper->stbc_param = 0x0000;
- /* It seems that Basic MCS set and Supported MCS set
- are identical for the first 10 bytes */
- memset(&ht_oper->basic_set, 0, 16);
- memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
- return pos + sizeof(struct ieee80211_ht_operation);
- }
- u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
- const struct cfg80211_chan_def *chandef)
- {
- struct ieee80211_vht_operation *vht_oper;
- *pos++ = WLAN_EID_VHT_OPERATION;
- *pos++ = sizeof(struct ieee80211_vht_operation);
- vht_oper = (struct ieee80211_vht_operation *)pos;
- vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
- chandef->center_freq1);
- if (chandef->center_freq2)
- vht_oper->center_freq_seg2_idx =
- ieee80211_frequency_to_channel(chandef->center_freq2);
- else
- vht_oper->center_freq_seg2_idx = 0x00;
- switch (chandef->width) {
- case NL80211_CHAN_WIDTH_160:
- /*
- * Convert 160 MHz channel width to new style as interop
- * workaround.
- */
- vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
- vht_oper->center_freq_seg2_idx = vht_oper->center_freq_seg1_idx;
- if (chandef->chan->center_freq < chandef->center_freq1)
- vht_oper->center_freq_seg1_idx -= 8;
- else
- vht_oper->center_freq_seg1_idx += 8;
- break;
- case NL80211_CHAN_WIDTH_80P80:
- /*
- * Convert 80+80 MHz channel width to new style as interop
- * workaround.
- */
- vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
- break;
- case NL80211_CHAN_WIDTH_80:
- vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
- break;
- default:
- vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
- break;
- }
- /* don't require special VHT peer rates */
- vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
- return pos + sizeof(struct ieee80211_vht_operation);
- }
- bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
- struct cfg80211_chan_def *chandef)
- {
- enum nl80211_channel_type channel_type;
- if (!ht_oper)
- return false;
- switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
- 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 false;
- }
- cfg80211_chandef_create(chandef, chandef->chan, channel_type);
- return true;
- }
- bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
- struct cfg80211_chan_def *chandef)
- {
- struct cfg80211_chan_def new = *chandef;
- int cf1, cf2;
- if (!oper)
- return false;
- cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
- chandef->chan->band);
- cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
- chandef->chan->band);
- switch (oper->chan_width) {
- case IEEE80211_VHT_CHANWIDTH_USE_HT:
- break;
- case IEEE80211_VHT_CHANWIDTH_80MHZ:
- new.width = NL80211_CHAN_WIDTH_80;
- new.center_freq1 = cf1;
- /* If needed, adjust based on the newer interop workaround. */
- if (oper->center_freq_seg2_idx) {
- unsigned int diff;
- diff = abs(oper->center_freq_seg2_idx -
- oper->center_freq_seg1_idx);
- if (diff == 8) {
- new.width = NL80211_CHAN_WIDTH_160;
- new.center_freq1 = cf2;
- } else if (diff > 8) {
- new.width = NL80211_CHAN_WIDTH_80P80;
- new.center_freq2 = cf2;
- }
- }
- break;
- case IEEE80211_VHT_CHANWIDTH_160MHZ:
- new.width = NL80211_CHAN_WIDTH_160;
- new.center_freq1 = cf1;
- break;
- case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
- new.width = NL80211_CHAN_WIDTH_80P80;
- new.center_freq1 = cf1;
- new.center_freq2 = cf2;
- break;
- default:
- return false;
- }
- if (!cfg80211_chandef_valid(&new))
- return false;
- *chandef = new;
- return true;
- }
- int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
- const struct ieee80211_supported_band *sband,
- const u8 *srates, int srates_len, u32 *rates)
- {
- u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
- int shift = ieee80211_chandef_get_shift(chandef);
- struct ieee80211_rate *br;
- int brate, rate, i, j, count = 0;
- *rates = 0;
- for (i = 0; i < srates_len; i++) {
- rate = srates[i] & 0x7f;
- for (j = 0; j < sband->n_bitrates; j++) {
- br = &sband->bitrates[j];
- if ((rate_flags & br->flags) != rate_flags)
- continue;
- brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
- if (brate == rate) {
- *rates |= BIT(j);
- count++;
- break;
- }
- }
- }
- return count;
- }
- int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
- struct sk_buff *skb, bool need_basic,
- enum nl80211_band band)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_supported_band *sband;
- int rate, shift;
- u8 i, rates, *pos;
- u32 basic_rates = sdata->vif.bss_conf.basic_rates;
- u32 rate_flags;
- shift = ieee80211_vif_get_shift(&sdata->vif);
- rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
- sband = local->hw.wiphy->bands[band];
- rates = 0;
- for (i = 0; i < sband->n_bitrates; i++) {
- if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
- continue;
- rates++;
- }
- 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++) {
- u8 basic = 0;
- if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
- continue;
- if (need_basic && basic_rates & BIT(i))
- basic = 0x80;
- rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
- 5 * (1 << shift));
- *pos++ = basic | (u8) rate;
- }
- return 0;
- }
- int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
- struct sk_buff *skb, bool need_basic,
- enum nl80211_band band)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_supported_band *sband;
- int rate, shift;
- u8 i, exrates, *pos;
- u32 basic_rates = sdata->vif.bss_conf.basic_rates;
- u32 rate_flags;
- rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
- shift = ieee80211_vif_get_shift(&sdata->vif);
- sband = local->hw.wiphy->bands[band];
- exrates = 0;
- for (i = 0; i < sband->n_bitrates; i++) {
- if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
- continue;
- exrates++;
- }
- 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++) {
- u8 basic = 0;
- if ((rate_flags & sband->bitrates[i].flags)
- != rate_flags)
- continue;
- if (need_basic && basic_rates & BIT(i))
- basic = 0x80;
- rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
- 5 * (1 << shift));
- *pos++ = basic | (u8) rate;
- }
- }
- return 0;
- }
- 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;
- if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
- /* non-managed type inferfaces */
- return 0;
- }
- return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
- }
- EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
- u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
- {
- if (!mcs)
- return 1;
- /* TODO: consider rx_highest */
- if (mcs->rx_mask[3])
- return 4;
- if (mcs->rx_mask[2])
- return 3;
- if (mcs->rx_mask[1])
- return 2;
- return 1;
- }
- /**
- * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
- * @local: mac80211 hw info struct
- * @status: RX status
- * @mpdu_len: total MPDU length (including FCS)
- * @mpdu_offset: offset into MPDU to calculate timestamp at
- *
- * This function calculates the RX timestamp at the given MPDU offset, taking
- * into account what the RX timestamp was. An offset of 0 will just normalize
- * the timestamp to TSF at beginning of MPDU reception.
- */
- u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
- struct ieee80211_rx_status *status,
- unsigned int mpdu_len,
- unsigned int mpdu_offset)
- {
- u64 ts = status->mactime;
- struct rate_info ri;
- u16 rate;
- if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
- return 0;
- memset(&ri, 0, sizeof(ri));
- /* Fill cfg80211 rate info */
- if (status->flag & RX_FLAG_HT) {
- ri.mcs = status->rate_idx;
- ri.flags |= RATE_INFO_FLAGS_MCS;
- if (status->flag & RX_FLAG_40MHZ)
- ri.bw = RATE_INFO_BW_40;
- else
- ri.bw = RATE_INFO_BW_20;
- if (status->flag & RX_FLAG_SHORT_GI)
- ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
- } else if (status->flag & RX_FLAG_VHT) {
- ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
- ri.mcs = status->rate_idx;
- ri.nss = status->vht_nss;
- if (status->flag & RX_FLAG_40MHZ)
- ri.bw = RATE_INFO_BW_40;
- else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
- ri.bw = RATE_INFO_BW_80;
- else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
- ri.bw = RATE_INFO_BW_160;
- else
- ri.bw = RATE_INFO_BW_20;
- if (status->flag & RX_FLAG_SHORT_GI)
- ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
- } else {
- struct ieee80211_supported_band *sband;
- int shift = 0;
- int bitrate;
- if (status->flag & RX_FLAG_10MHZ) {
- shift = 1;
- ri.bw = RATE_INFO_BW_10;
- } else if (status->flag & RX_FLAG_5MHZ) {
- shift = 2;
- ri.bw = RATE_INFO_BW_5;
- } else {
- ri.bw = RATE_INFO_BW_20;
- }
- sband = local->hw.wiphy->bands[status->band];
- bitrate = sband->bitrates[status->rate_idx].bitrate;
- ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
- if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
- /* TODO: handle HT/VHT preambles */
- if (status->band == NL80211_BAND_5GHZ) {
- ts += 20 << shift;
- mpdu_offset += 2;
- } else if (status->flag & RX_FLAG_SHORTPRE) {
- ts += 96;
- } else {
- ts += 192;
- }
- }
- }
- rate = cfg80211_calculate_bitrate(&ri);
- if (WARN_ONCE(!rate,
- "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
- (unsigned long long)status->flag, status->rate_idx,
- status->vht_nss))
- return 0;
- /* rewind from end of MPDU */
- if (status->flag & RX_FLAG_MACTIME_END)
- ts -= mpdu_len * 8 * 10 / rate;
- ts += mpdu_offset * 8 * 10 / rate;
- return ts;
- }
- void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
- {
- struct ieee80211_sub_if_data *sdata;
- struct cfg80211_chan_def chandef;
- mutex_lock(&local->mtx);
- mutex_lock(&local->iflist_mtx);
- list_for_each_entry(sdata, &local->interfaces, list) {
- /* it might be waiting for the local->mtx, but then
- * by the time it gets it, sdata->wdev.cac_started
- * will no longer be true
- */
- cancel_delayed_work(&sdata->dfs_cac_timer_work);
- if (sdata->wdev.cac_started) {
- chandef = sdata->vif.bss_conf.chandef;
- ieee80211_vif_release_channel(sdata);
- cfg80211_cac_event(sdata->dev,
- &chandef,
- NL80211_RADAR_CAC_ABORTED,
- GFP_KERNEL);
- }
- }
- mutex_unlock(&local->iflist_mtx);
- mutex_unlock(&local->mtx);
- }
- void ieee80211_dfs_radar_detected_work(struct work_struct *work)
- {
- struct ieee80211_local *local =
- container_of(work, struct ieee80211_local, radar_detected_work);
- struct cfg80211_chan_def chandef = local->hw.conf.chandef;
- struct ieee80211_chanctx *ctx;
- int num_chanctx = 0;
- mutex_lock(&local->chanctx_mtx);
- list_for_each_entry(ctx, &local->chanctx_list, list) {
- if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
- continue;
- num_chanctx++;
- chandef = ctx->conf.def;
- }
- mutex_unlock(&local->chanctx_mtx);
- ieee80211_dfs_cac_cancel(local);
- if (num_chanctx > 1)
- /* XXX: multi-channel is not supported yet */
- WARN_ON(1);
- else
- cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
- }
- void ieee80211_radar_detected(struct ieee80211_hw *hw)
- {
- struct ieee80211_local *local = hw_to_local(hw);
- trace_api_radar_detected(local);
- ieee80211_queue_work(hw, &local->radar_detected_work);
- }
- EXPORT_SYMBOL(ieee80211_radar_detected);
- u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
- {
- u32 ret;
- int tmp;
- switch (c->width) {
- case NL80211_CHAN_WIDTH_20:
- c->width = NL80211_CHAN_WIDTH_20_NOHT;
- ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
- break;
- case NL80211_CHAN_WIDTH_40:
- c->width = NL80211_CHAN_WIDTH_20;
- c->center_freq1 = c->chan->center_freq;
- ret = IEEE80211_STA_DISABLE_40MHZ |
- IEEE80211_STA_DISABLE_VHT;
- break;
- case NL80211_CHAN_WIDTH_80:
- tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
- /* n_P40 */
- tmp /= 2;
- /* freq_P40 */
- c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
- c->width = NL80211_CHAN_WIDTH_40;
- ret = IEEE80211_STA_DISABLE_VHT;
- break;
- case NL80211_CHAN_WIDTH_80P80:
- c->center_freq2 = 0;
- c->width = NL80211_CHAN_WIDTH_80;
- ret = IEEE80211_STA_DISABLE_80P80MHZ |
- IEEE80211_STA_DISABLE_160MHZ;
- break;
- case NL80211_CHAN_WIDTH_160:
- /* n_P20 */
- tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
- /* n_P80 */
- tmp /= 4;
- c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
- c->width = NL80211_CHAN_WIDTH_80;
- ret = IEEE80211_STA_DISABLE_80P80MHZ |
- IEEE80211_STA_DISABLE_160MHZ;
- break;
- default:
- case NL80211_CHAN_WIDTH_20_NOHT:
- WARN_ON_ONCE(1);
- c->width = NL80211_CHAN_WIDTH_20_NOHT;
- ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
- break;
- case NL80211_CHAN_WIDTH_5:
- case NL80211_CHAN_WIDTH_10:
- WARN_ON_ONCE(1);
- /* keep c->width */
- ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
- break;
- }
- WARN_ON_ONCE(!cfg80211_chandef_valid(c));
- return ret;
- }
- /*
- * Returns true if smps_mode_new is strictly more restrictive than
- * smps_mode_old.
- */
- bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
- enum ieee80211_smps_mode smps_mode_new)
- {
- if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
- smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
- return false;
- switch (smps_mode_old) {
- case IEEE80211_SMPS_STATIC:
- return false;
- case IEEE80211_SMPS_DYNAMIC:
- return smps_mode_new == IEEE80211_SMPS_STATIC;
- case IEEE80211_SMPS_OFF:
- return smps_mode_new != IEEE80211_SMPS_OFF;
- default:
- WARN_ON(1);
- }
- return false;
- }
- int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_csa_settings *csa_settings)
- {
- struct sk_buff *skb;
- struct ieee80211_mgmt *mgmt;
- struct ieee80211_local *local = sdata->local;
- int freq;
- int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
- sizeof(mgmt->u.action.u.chan_switch);
- u8 *pos;
- if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
- sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
- return -EOPNOTSUPP;
- skb = dev_alloc_skb(local->tx_headroom + hdr_len +
- 5 + /* channel switch announcement element */
- 3 + /* secondary channel offset element */
- 8); /* mesh channel switch parameters element */
- if (!skb)
- return -ENOMEM;
- skb_reserve(skb, local->tx_headroom);
- mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
- memset(mgmt, 0, hdr_len);
- mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
- IEEE80211_STYPE_ACTION);
- eth_broadcast_addr(mgmt->da);
- memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
- if (ieee80211_vif_is_mesh(&sdata->vif)) {
- memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
- } else {
- struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
- memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
- }
- mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
- mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
- pos = skb_put(skb, 5);
- *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
- *pos++ = 3; /* IE length */
- *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
- freq = csa_settings->chandef.chan->center_freq;
- *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
- *pos++ = csa_settings->count; /* count */
- if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
- enum nl80211_channel_type ch_type;
- skb_put(skb, 3);
- *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
- *pos++ = 1; /* IE length */
- ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
- if (ch_type == NL80211_CHAN_HT40PLUS)
- *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
- else
- *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
- }
- if (ieee80211_vif_is_mesh(&sdata->vif)) {
- struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
- skb_put(skb, 8);
- *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
- *pos++ = 6; /* IE length */
- *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
- *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
- *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
- *pos++ |= csa_settings->block_tx ?
- WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
- put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
- pos += 2;
- put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
- pos += 2;
- }
- ieee80211_tx_skb(sdata, skb);
- return 0;
- }
- bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
- {
- return !(cs == NULL || cs->cipher == 0 ||
- cs->hdr_len < cs->pn_len + cs->pn_off ||
- cs->hdr_len <= cs->key_idx_off ||
- cs->key_idx_shift > 7 ||
- cs->key_idx_mask == 0);
- }
- bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
- {
- int i;
- /* Ensure we have enough iftype bitmap space for all iftype values */
- WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
- for (i = 0; i < n; i++)
- if (!ieee80211_cs_valid(&cs[i]))
- return false;
- return true;
- }
- const struct ieee80211_cipher_scheme *
- ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
- enum nl80211_iftype iftype)
- {
- const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
- int n = local->hw.n_cipher_schemes;
- int i;
- const struct ieee80211_cipher_scheme *cs = NULL;
- for (i = 0; i < n; i++) {
- if (l[i].cipher == cipher) {
- cs = &l[i];
- break;
- }
- }
- if (!cs || !(cs->iftype & BIT(iftype)))
- return NULL;
- return cs;
- }
- int ieee80211_cs_headroom(struct ieee80211_local *local,
- struct cfg80211_crypto_settings *crypto,
- enum nl80211_iftype iftype)
- {
- const struct ieee80211_cipher_scheme *cs;
- int headroom = IEEE80211_ENCRYPT_HEADROOM;
- int i;
- for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
- cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
- iftype);
- if (cs && headroom < cs->hdr_len)
- headroom = cs->hdr_len;
- }
- cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
- if (cs && headroom < cs->hdr_len)
- headroom = cs->hdr_len;
- return headroom;
- }
- static bool
- ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
- {
- s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
- int skip;
- if (end > 0)
- return false;
- /* One shot NOA */
- if (data->count[i] == 1)
- return false;
- if (data->desc[i].interval == 0)
- return false;
- /* End time is in the past, check for repetitions */
- skip = DIV_ROUND_UP(-end, data->desc[i].interval);
- if (data->count[i] < 255) {
- if (data->count[i] <= skip) {
- data->count[i] = 0;
- return false;
- }
- data->count[i] -= skip;
- }
- data->desc[i].start += skip * data->desc[i].interval;
- return true;
- }
- static bool
- ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
- s32 *offset)
- {
- bool ret = false;
- int i;
- for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
- s32 cur;
- if (!data->count[i])
- continue;
- if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
- ret = true;
- cur = data->desc[i].start - tsf;
- if (cur > *offset)
- continue;
- cur = data->desc[i].start + data->desc[i].duration - tsf;
- if (cur > *offset)
- *offset = cur;
- }
- return ret;
- }
- static u32
- ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
- {
- s32 offset = 0;
- int tries = 0;
- /*
- * arbitrary limit, used to avoid infinite loops when combined NoA
- * descriptors cover the full time period.
- */
- int max_tries = 5;
- ieee80211_extend_absent_time(data, tsf, &offset);
- do {
- if (!ieee80211_extend_absent_time(data, tsf, &offset))
- break;
- tries++;
- } while (tries < max_tries);
- return offset;
- }
- void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
- {
- u32 next_offset = BIT(31) - 1;
- int i;
- data->absent = 0;
- data->has_next_tsf = false;
- for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
- s32 start;
- if (!data->count[i])
- continue;
- ieee80211_extend_noa_desc(data, tsf, i);
- start = data->desc[i].start - tsf;
- if (start <= 0)
- data->absent |= BIT(i);
- if (next_offset > start)
- next_offset = start;
- data->has_next_tsf = true;
- }
- if (data->absent)
- next_offset = ieee80211_get_noa_absent_time(data, tsf);
- data->next_tsf = tsf + next_offset;
- }
- EXPORT_SYMBOL(ieee80211_update_p2p_noa);
- int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
- struct ieee80211_noa_data *data, u32 tsf)
- {
- int ret = 0;
- int i;
- memset(data, 0, sizeof(*data));
- for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
- const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
- if (!desc->count || !desc->duration)
- continue;
- data->count[i] = desc->count;
- data->desc[i].start = le32_to_cpu(desc->start_time);
- data->desc[i].duration = le32_to_cpu(desc->duration);
- data->desc[i].interval = le32_to_cpu(desc->interval);
- if (data->count[i] > 1 &&
- data->desc[i].interval < data->desc[i].duration)
- continue;
- ieee80211_extend_noa_desc(data, tsf, i);
- ret++;
- }
- if (ret)
- ieee80211_update_p2p_noa(data, tsf);
- return ret;
- }
- EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
- void ieee80211_recalc_dtim(struct ieee80211_local *local,
- struct ieee80211_sub_if_data *sdata)
- {
- u64 tsf = drv_get_tsf(local, sdata);
- u64 dtim_count = 0;
- u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
- u8 dtim_period = sdata->vif.bss_conf.dtim_period;
- struct ps_data *ps;
- u8 bcns_from_dtim;
- if (tsf == -1ULL || !beacon_int || !dtim_period)
- return;
- if (sdata->vif.type == NL80211_IFTYPE_AP ||
- sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
- if (!sdata->bss)
- return;
- ps = &sdata->bss->ps;
- } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
- ps = &sdata->u.mesh.ps;
- } else {
- return;
- }
- /*
- * actually finds last dtim_count, mac80211 will update in
- * __beacon_add_tim().
- * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
- */
- do_div(tsf, beacon_int);
- bcns_from_dtim = do_div(tsf, dtim_period);
- /* just had a DTIM */
- if (!bcns_from_dtim)
- dtim_count = 0;
- else
- dtim_count = dtim_period - bcns_from_dtim;
- ps->dtim_count = dtim_count;
- }
- static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
- struct ieee80211_chanctx *ctx)
- {
- struct ieee80211_sub_if_data *sdata;
- u8 radar_detect = 0;
- lockdep_assert_held(&local->chanctx_mtx);
- if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
- return 0;
- list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
- if (sdata->reserved_radar_required)
- radar_detect |= BIT(sdata->reserved_chandef.width);
- /*
- * An in-place reservation context should not have any assigned vifs
- * until it replaces the other context.
- */
- WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
- !list_empty(&ctx->assigned_vifs));
- list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
- if (sdata->radar_required)
- radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
- return radar_detect;
- }
- int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
- const struct cfg80211_chan_def *chandef,
- enum ieee80211_chanctx_mode chanmode,
- u8 radar_detect)
- {
- struct ieee80211_local *local = sdata->local;
- struct ieee80211_sub_if_data *sdata_iter;
- enum nl80211_iftype iftype = sdata->wdev.iftype;
- int num[NUM_NL80211_IFTYPES];
- struct ieee80211_chanctx *ctx;
- int num_different_channels = 0;
- int total = 1;
- lockdep_assert_held(&local->chanctx_mtx);
- if (WARN_ON(hweight32(radar_detect) > 1))
- return -EINVAL;
- if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
- !chandef->chan))
- return -EINVAL;
- if (chandef)
- num_different_channels = 1;
- if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
- return -EINVAL;
- /* Always allow software iftypes */
- if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
- if (radar_detect)
- return -EINVAL;
- return 0;
- }
- memset(num, 0, sizeof(num));
- if (iftype != NL80211_IFTYPE_UNSPECIFIED)
- num[iftype] = 1;
- list_for_each_entry(ctx, &local->chanctx_list, list) {
- if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
- continue;
- radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
- if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
- num_different_channels++;
- continue;
- }
- if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
- cfg80211_chandef_compatible(chandef,
- &ctx->conf.def))
- continue;
- num_different_channels++;
- }
- list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
- struct wireless_dev *wdev_iter;
- wdev_iter = &sdata_iter->wdev;
- if (sdata_iter == sdata ||
- !ieee80211_sdata_running(sdata_iter) ||
- local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
- continue;
- num[wdev_iter->iftype]++;
- total++;
- }
- if (total == 1 && !radar_detect)
- return 0;
- return cfg80211_check_combinations(local->hw.wiphy,
- num_different_channels,
- radar_detect, num);
- }
- static void
- ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
- void *data)
- {
- u32 *max_num_different_channels = data;
- *max_num_different_channels = max(*max_num_different_channels,
- c->num_different_channels);
- }
- int ieee80211_max_num_channels(struct ieee80211_local *local)
- {
- struct ieee80211_sub_if_data *sdata;
- int num[NUM_NL80211_IFTYPES] = {};
- struct ieee80211_chanctx *ctx;
- int num_different_channels = 0;
- u8 radar_detect = 0;
- u32 max_num_different_channels = 1;
- int err;
- lockdep_assert_held(&local->chanctx_mtx);
- list_for_each_entry(ctx, &local->chanctx_list, list) {
- if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
- continue;
- num_different_channels++;
- radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
- }
- list_for_each_entry_rcu(sdata, &local->interfaces, list)
- num[sdata->wdev.iftype]++;
- err = cfg80211_iter_combinations(local->hw.wiphy,
- num_different_channels, radar_detect,
- num, ieee80211_iter_max_chans,
- &max_num_different_channels);
- if (err < 0)
- return err;
- return max_num_different_channels;
- }
- u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
- {
- *buf++ = WLAN_EID_VENDOR_SPECIFIC;
- *buf++ = 7; /* len */
- *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
- *buf++ = 0x50;
- *buf++ = 0xf2;
- *buf++ = 2; /* WME */
- *buf++ = 0; /* WME info */
- *buf++ = 1; /* WME ver */
- *buf++ = qosinfo; /* U-APSD no in use */
- return buf;
- }
- void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
- unsigned long *frame_cnt,
- unsigned long *byte_cnt)
- {
- struct txq_info *txqi = to_txq_info(txq);
- u32 frag_cnt = 0, frag_bytes = 0;
- struct sk_buff *skb;
- skb_queue_walk(&txqi->frags, skb) {
- frag_cnt++;
- frag_bytes += skb->len;
- }
- if (frame_cnt)
- *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
- if (byte_cnt)
- *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
- }
- EXPORT_SYMBOL(ieee80211_txq_get_depth);
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