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authorroot <root@artemis.panaceas.org>2015-12-25 15:00:15 +0000
committerroot <root@artemis.panaceas.org>2015-12-25 15:00:15 +0000
commitddd86436f4e3643c04b797f858dab95d5f2e4de9 (patch)
treebfe7a780cf9a2f4fc33aec32c82e625e79dece1f /net/mac80211/util.c
downloadbackports-3.10.19-1-master.tar.gz
backports-3.10.19-1-master.tar.bz2
backports-3.10.19-1-master.zip
Diffstat (limited to 'net/mac80211/util.c')
-rw-r--r--net/mac80211/util.c2234
1 files changed, 2234 insertions, 0 deletions
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
new file mode 100644
index 0000000..5db8eb5
--- /dev/null
+++ b/net/mac80211/util.c
@@ -0,0 +1,2234 @@
+/*
+ * 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>
+#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 */
+void *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);
+
+u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
+ enum nl80211_iftype type)
+{
+ __le16 fc = hdr->frame_control;
+
+ /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
+ if (len < 16)
+ return NULL;
+
+ if (ieee80211_is_data(fc)) {
+ if (len < 24) /* drop incorrect hdr len (data) */
+ return NULL;
+
+ if (ieee80211_has_a4(fc))
+ return NULL;
+ if (ieee80211_has_tods(fc))
+ return hdr->addr1;
+ if (ieee80211_has_fromds(fc))
+ return hdr->addr2;
+
+ return hdr->addr3;
+ }
+
+ if (ieee80211_is_mgmt(fc)) {
+ if (len < 24) /* drop incorrect hdr len (mgmt) */
+ return NULL;
+ return hdr->addr3;
+ }
+
+ if (ieee80211_is_ctl(fc)) {
+ if(ieee80211_is_pspoll(fc))
+ return hdr->addr1;
+
+ if (ieee80211_is_back_req(fc)) {
+ switch (type) {
+ case NL80211_IFTYPE_STATION:
+ return hdr->addr2;
+ case NL80211_IFTYPE_AP:
+ case NL80211_IFTYPE_AP_VLAN:
+ return hdr->addr1;
+ default:
+ break; /* fall through to the return */
+ }
+ }
+ }
+
+ return NULL;
+}
+
+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 ieee80211_band band, size_t len,
+ 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.
+ */
+
+ if (band == IEEE80211_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 - 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 */
+__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ enum ieee80211_band band,
+ size_t frame_len,
+ struct ieee80211_rate *rate)
+{
+ struct ieee80211_sub_if_data *sdata;
+ u16 dur;
+ int erp;
+ 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;
+ }
+
+ dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
+ short_preamble);
+
+ 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;
+ 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;
+ }
+
+ /* CTS duration */
+ dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate,
+ erp, short_preamble);
+ /* Data frame duration */
+ dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
+ erp, short_preamble);
+ /* ACK duration */
+ dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
+ erp, short_preamble);
+
+ 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;
+ 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;
+ }
+
+ /* Data frame duration */
+ dur = ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
+ erp, short_preamble);
+ if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
+ /* ACK duration */
+ dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
+ erp, short_preamble);
+ }
+
+ 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->hw.queues < IEEE80211_NUM_ACS)
+ n_acs = 1;
+
+ list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+ int ac;
+
+ if (!sdata->dev)
+ continue;
+
+ 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;
+
+ 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)
+{
+ 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;
+
+ __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)
+{
+ 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);
+}
+EXPORT_SYMBOL(ieee80211_wake_queue);
+
+static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
+ enum queue_stop_reason reason)
+{
+ 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 (test_bit(reason, &local->queue_stop_reasons[queue]))
+ return;
+
+ __set_bit(reason, &local->queue_stop_reasons[queue]);
+
+ 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)
+{
+ 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);
+}
+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);
+ __skb_queue_tail(&local->pending[queue], skb);
+ __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+ spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+}
+
+void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
+ struct sk_buff_head *skbs,
+ void (*fn)(void *data), void *data)
+{
+ 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);
+
+ __skb_queue_tail(&local->pending[queue], skb);
+ }
+
+ if (fn)
+ fn(data);
+
+ for (i = 0; i < hw->queues; i++)
+ __ieee80211_wake_queue(hw, i,
+ IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+ 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)
+{
+ 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);
+
+ 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);
+}
+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)
+{
+ 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);
+
+ 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);
+}
+EXPORT_SYMBOL(ieee80211_wake_queues);
+
+void ieee80211_flush_queues(struct ieee80211_local *local,
+ struct ieee80211_sub_if_data *sdata)
+{
+ u32 queues;
+
+ if (!local->ops->flush)
+ return;
+
+ if (sdata && local->hw.flags & IEEE80211_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;
+ }
+
+ ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
+ IEEE80211_QUEUE_STOP_REASON_FLUSH);
+
+ drv_flush(local, queues, false);
+
+ ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
+ IEEE80211_QUEUE_STOP_REASON_FLUSH);
+}
+
+void ieee80211_iterate_active_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);
+ struct ieee80211_sub_if_data *sdata;
+
+ mutex_lock(&local->iflist_mtx);
+
+ list_for_each_entry(sdata, &local->interfaces, list) {
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_MONITOR:
+ case NL80211_IFTYPE_AP_VLAN:
+ continue;
+ default:
+ break;
+ }
+ if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
+ !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
+ continue;
+ if (ieee80211_sdata_running(sdata))
+ iterator(data, sdata->vif.addr,
+ &sdata->vif);
+ }
+
+ sdata = rcu_dereference_protected(local->monitor_sdata,
+ lockdep_is_held(&local->iflist_mtx));
+ if (sdata &&
+ (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
+ sdata->flags & IEEE80211_SDATA_IN_DRIVER))
+ iterator(data, sdata->vif.addr, &sdata->vif);
+
+ mutex_unlock(&local->iflist_mtx);
+}
+EXPORT_SYMBOL_GPL(ieee80211_iterate_active_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);
+ struct ieee80211_sub_if_data *sdata;
+
+ rcu_read_lock();
+
+ list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_MONITOR:
+ case NL80211_IFTYPE_AP_VLAN:
+ continue;
+ default:
+ break;
+ }
+ if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
+ !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
+ continue;
+ if (ieee80211_sdata_running(sdata))
+ iterator(data, sdata->vif.addr,
+ &sdata->vif);
+ }
+
+ sdata = rcu_dereference(local->monitor_sdata);
+ if (sdata &&
+ (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
+ sdata->flags & IEEE80211_SDATA_IN_DRIVER))
+ iterator(data, sdata->vif.addr, &sdata->vif);
+
+ rcu_read_unlock();
+}
+EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
+
+/*
+ * 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)
+{
+ if (WARN(local->suspended && !local->resuming,
+ "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:
+ /*
+ * 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_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_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_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)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_tx_queue_params qparam;
+ struct ieee80211_chanctx_conf *chanctx_conf;
+ int ac;
+ bool use_11b, enable_qos;
+ 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 == IEEE80211_BAND_2GHZ) &&
+ !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
+ rcu_read_unlock();
+
+ /*
+ * 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);
+
+ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+ /* Set defaults according to 802.11-2007 Table 7-37 */
+ aCWmax = 1023;
+ if (use_11b)
+ aCWmin = 31;
+ else
+ aCWmin = 15;
+
+ 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. */
+ qparam.cw_max = aCWmax;
+ qparam.cw_min = aCWmin;
+ qparam.txop = 0;
+ qparam.aifs = 2;
+ }
+
+ 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.bss_conf.qos = enable_qos;
+ if (bss_notify)
+ ieee80211_bss_info_change_notify(sdata,
+ BSS_CHANGED_QOS);
+ }
+}
+
+void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
+ const size_t supp_rates_len,
+ const u8 *supp_rates)
+{
+ struct ieee80211_chanctx_conf *chanctx_conf;
+ 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;
+
+ rcu_read_lock();
+ chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+
+ if (chanctx_conf &&
+ chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ &&
+ have_higher_than_11mbit)
+ sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
+ else
+ sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
+ rcu_read_unlock();
+
+ ieee80211_set_wmm_default(sdata, true);
+}
+
+u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
+ enum ieee80211_band band)
+{
+ struct ieee80211_supported_band *sband;
+ struct ieee80211_rate *bitrates;
+ u32 mandatory_rates;
+ enum ieee80211_rate_flags mandatory_flag;
+ int i;
+
+ sband = local->hw.wiphy->bands[band];
+ if (WARN_ON(!sband))
+ return 1;
+
+ 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;
+}
+
+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;
+
+ skb = dev_alloc_skb(local->hw.extra_tx_headroom +
+ sizeof(*mgmt) + 6 + extra_len);
+ if (!skb)
+ return;
+
+ 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);
+ 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);
+ }
+}
+
+int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
+ size_t buffer_len, const u8 *ie, size_t ie_len,
+ enum ieee80211_band band, u32 rate_mask,
+ u8 channel)
+{
+ struct ieee80211_supported_band *sband;
+ u8 *pos = buffer, *end = buffer + buffer_len;
+ size_t offset = 0, noffset;
+ int supp_rates_len, i;
+ u8 rates[32];
+ int num_rates;
+ int ext_rates_len;
+
+ sband = local->hw.wiphy->bands[band];
+ if (WARN_ON_ONCE(!sband))
+ return 0;
+
+ 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);
+
+ 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 (channel && sband->band == IEEE80211_BAND_2GHZ) {
+ if (end - pos < 3)
+ goto out_err;
+ *pos++ = WLAN_EID_DS_PARAMS;
+ *pos++ = 1;
+ *pos++ = channel;
+ }
+
+ /* 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.
+ */
+
+ /* add any remaining custom IEs */
+ if (ie && ie_len) {
+ noffset = ie_len;
+ if (end - pos < noffset - offset)
+ goto out_err;
+ memcpy(pos, ie + offset, noffset - offset);
+ pos += noffset - offset;
+ }
+
+ if (sband->vht_cap.vht_supported) {
+ 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;
+}
+
+struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
+ 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 sk_buff *skb;
+ struct ieee80211_mgmt *mgmt;
+ u8 chan_no;
+ int ies_len;
+
+ /*
+ * 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)
+ chan_no = 0;
+ else
+ chan_no = ieee80211_frequency_to_channel(chan->center_freq);
+
+ skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
+ ssid, ssid_len, 100 + ie_len);
+ if (!skb)
+ return NULL;
+
+ ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
+ skb_tailroom(skb),
+ ie, ie_len, chan->band,
+ ratemask, chan_no);
+ 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, 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, 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_local *local,
+ struct ieee802_11_elems *elems,
+ enum ieee80211_band band, u32 *basic_rates)
+{
+ 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];
+
+ if (WARN_ON(!sband))
+ return 1;
+
+ 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;
+ 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++) {
+ if (bitrates[j].bitrate == 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_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);
+}
+
+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;
+
+#ifdef CONFIG_PM
+ if (local->suspended)
+ local->resuming = true;
+
+ 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.
+ */
+ reconfig_due_to_wowlan = true;
+ }
+#endif
+ /* everything else happens only if HW was up & running */
+ if (!local->open_count)
+ goto wake_up;
+
+ /*
+ * 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;
+ }
+
+ /* 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_assign_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);
+ }
+
+ /* add channel contexts */
+ if (local->use_chanctx) {
+ 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);
+ }
+
+ list_for_each_entry(sdata, &local->interfaces, list) {
+ if (!ieee80211_sdata_running(sdata))
+ continue;
+ ieee80211_assign_chanctx(local, sdata);
+ }
+
+ sdata = rtnl_dereference(local->monitor_sdata);
+ if (sdata && ieee80211_sdata_running(sdata))
+ ieee80211_assign_chanctx(local, sdata);
+
+ /* 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)
+ 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));
+ }
+ mutex_unlock(&local->sta_mtx);
+
+ /* reconfigure tx conf */
+ 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;
+
+ for (i = 0; i < IEEE80211_NUM_ACS; i++)
+ drv_conf_tx(local, sdata, i,
+ &sdata->tx_conf[i]);
+ }
+ }
+
+ /* 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;
+
+ /* 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;
+
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_STATION:
+ changed |= BSS_CHANGED_ASSOC |
+ BSS_CHANGED_ARP_FILTER |
+ BSS_CHANGED_PS;
+
+ if (sdata->u.mgd.dtim_period)
+ changed |= BSS_CHANGED_DTIM_PERIOD;
+
+ mutex_lock(&sdata->u.mgd.mtx);
+ ieee80211_bss_info_change_notify(sdata, changed);
+ mutex_unlock(&sdata->u.mgd.mtx);
+ 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_WDS:
+ break;
+ case NL80211_IFTYPE_AP_VLAN:
+ case NL80211_IFTYPE_MONITOR:
+ /* ignore virtual */
+ break;
+ case NL80211_IFTYPE_P2P_DEVICE:
+ changed = BSS_CHANGED_IDLE;
+ 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, -1);
+
+ /*
+ * 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, 0);
+ }
+ }
+
+ /* 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)
+ if (ieee80211_sdata_running(sdata))
+ ieee80211_enable_keys(sdata);
+
+ wake_up:
+ local->in_reconfig = false;
+ barrier();
+
+ 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 (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
+ mutex_lock(&local->sta_mtx);
+
+ list_for_each_entry(sta, &local->sta_list, list) {
+ 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);
+
+ /*
+ * If this is for hw restart things are still running.
+ * We may want to change that later, however.
+ */
+ if (!local->suspended || reconfig_due_to_wowlan)
+ drv_restart_complete(local);
+
+ if (!local->suspended)
+ return 0;
+
+#ifdef CONFIG_PM
+ /* first set suspended false, then resuming */
+ local->suspended = false;
+ mb();
+ local->resuming = false;
+
+ 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));
+
+ if (WARN_ON_ONCE(!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);
+}
+
+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;
+}
+
+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)
+{
+ 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;
+
+ 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);
+}
+
+void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
+ const struct ieee80211_ht_operation *ht_oper,
+ struct cfg80211_chan_def *chandef)
+{
+ enum nl80211_channel_type channel_type;
+
+ if (!ht_oper) {
+ cfg80211_chandef_create(chandef, control_chan,
+ NL80211_CHAN_NO_HT);
+ return;
+ }
+
+ 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;
+ }
+
+ cfg80211_chandef_create(chandef, control_chan, channel_type);
+}
+
+int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
+ struct sk_buff *skb, bool need_basic,
+ enum ieee80211_band band)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_supported_band *sband;
+ int rate;
+ u8 i, rates, *pos;
+ u32 basic_rates = sdata->vif.bss_conf.basic_rates;
+
+ sband = local->hw.wiphy->bands[band];
+ 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++) {
+ u8 basic = 0;
+ if (need_basic && basic_rates & BIT(i))
+ basic = 0x80;
+ rate = sband->bitrates[i].bitrate;
+ *pos++ = basic | (u8) (rate / 5);
+ }
+
+ return 0;
+}
+
+int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
+ struct sk_buff *skb, bool need_basic,
+ enum ieee80211_band band)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_supported_band *sband;
+ int rate;
+ u8 i, exrates, *pos;
+ u32 basic_rates = sdata->vif.bss_conf.basic_rates;
+
+ sband = local->hw.wiphy->bands[band];
+ 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++) {
+ u8 basic = 0;
+ if (need_basic && basic_rates & BIT(i))
+ basic = 0x80;
+ rate = sband->bitrates[i].bitrate;
+ *pos++ = basic | (u8) (rate / 5);
+ }
+ }
+ 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 ifmgd->ave_beacon_signal / 16;
+}
+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.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
+ 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.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
+ if (status->flag & RX_FLAG_80MHZ)
+ ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
+ if (status->flag & RX_FLAG_80P80MHZ)
+ ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
+ if (status->flag & RX_FLAG_160MHZ)
+ ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
+ if (status->flag & RX_FLAG_SHORT_GI)
+ ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
+ } else {
+ struct ieee80211_supported_band *sband;
+
+ sband = local->hw.wiphy->bands[status->band];
+ ri.legacy = sband->bitrates[status->rate_idx].bitrate;
+ }
+
+ rate = cfg80211_calculate_bitrate(&ri);
+ if (WARN_ONCE(!rate,
+ "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
+ 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;
+
+ mutex_lock(&local->iflist_mtx);
+ list_for_each_entry(sdata, &local->interfaces, list) {
+ cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
+
+ if (sdata->wdev.cac_started) {
+ ieee80211_vif_release_channel(sdata);
+ cfg80211_cac_event(sdata->dev,
+ NL80211_RADAR_CAC_ABORTED,
+ GFP_KERNEL);
+ }
+ }
+ mutex_unlock(&local->iflist_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;
+
+ ieee80211_dfs_cac_cancel(local);
+
+ if (local->use_chanctx)
+ /* currently not handled */
+ WARN_ON(1);
+ else {
+ chandef = local->hw.conf.chandef;
+ 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);