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dd5ecfeac8
Support the cfg80211 API to override VHT capabilities on association. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
4366 lines
122 KiB
C
4366 lines
122 KiB
C
/*
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* BSS client mode implementation
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* Copyright 2003-2008, Jouni Malinen <j@w1.fi>
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* Copyright 2004, Instant802 Networks, Inc.
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* Copyright 2005, Devicescape Software, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/delay.h>
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#include <linux/if_ether.h>
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#include <linux/skbuff.h>
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#include <linux/if_arp.h>
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#include <linux/etherdevice.h>
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#include <linux/moduleparam.h>
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#include <linux/rtnetlink.h>
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#include <linux/pm_qos.h>
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#include <linux/crc32.h>
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#include <linux/slab.h>
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#include <linux/export.h>
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#include <net/mac80211.h>
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#include <asm/unaligned.h>
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#include "ieee80211_i.h"
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#include "driver-ops.h"
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#include "rate.h"
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#include "led.h"
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#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
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#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
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#define IEEE80211_AUTH_MAX_TRIES 3
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#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
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#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
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#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
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#define IEEE80211_ASSOC_MAX_TRIES 3
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static int max_nullfunc_tries = 2;
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module_param(max_nullfunc_tries, int, 0644);
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MODULE_PARM_DESC(max_nullfunc_tries,
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"Maximum nullfunc tx tries before disconnecting (reason 4).");
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static int max_probe_tries = 5;
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module_param(max_probe_tries, int, 0644);
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MODULE_PARM_DESC(max_probe_tries,
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"Maximum probe tries before disconnecting (reason 4).");
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/*
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* Beacon loss timeout is calculated as N frames times the
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* advertised beacon interval. This may need to be somewhat
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* higher than what hardware might detect to account for
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* delays in the host processing frames. But since we also
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* probe on beacon miss before declaring the connection lost
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* default to what we want.
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*/
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#define IEEE80211_BEACON_LOSS_COUNT 7
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/*
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* Time the connection can be idle before we probe
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* it to see if we can still talk to the AP.
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*/
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#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
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/*
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* Time we wait for a probe response after sending
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* a probe request because of beacon loss or for
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* checking the connection still works.
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*/
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static int probe_wait_ms = 500;
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module_param(probe_wait_ms, int, 0644);
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MODULE_PARM_DESC(probe_wait_ms,
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"Maximum time(ms) to wait for probe response"
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" before disconnecting (reason 4).");
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/*
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* Weight given to the latest Beacon frame when calculating average signal
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* strength for Beacon frames received in the current BSS. This must be
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* between 1 and 15.
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*/
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#define IEEE80211_SIGNAL_AVE_WEIGHT 3
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/*
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* How many Beacon frames need to have been used in average signal strength
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* before starting to indicate signal change events.
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*/
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#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
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#define TMR_RUNNING_TIMER 0
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#define TMR_RUNNING_CHANSW 1
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/*
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* All cfg80211 functions have to be called outside a locked
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* section so that they can acquire a lock themselves... This
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* is much simpler than queuing up things in cfg80211, but we
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* do need some indirection for that here.
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*/
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enum rx_mgmt_action {
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/* no action required */
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RX_MGMT_NONE,
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/* caller must call cfg80211_send_deauth() */
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RX_MGMT_CFG80211_DEAUTH,
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/* caller must call cfg80211_send_disassoc() */
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RX_MGMT_CFG80211_DISASSOC,
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/* caller must call cfg80211_send_rx_auth() */
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RX_MGMT_CFG80211_RX_AUTH,
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/* caller must call cfg80211_send_rx_assoc() */
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RX_MGMT_CFG80211_RX_ASSOC,
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/* caller must call cfg80211_send_assoc_timeout() */
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RX_MGMT_CFG80211_ASSOC_TIMEOUT,
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/* used when a processed beacon causes a deauth */
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RX_MGMT_CFG80211_TX_DEAUTH,
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};
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/* utils */
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static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
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{
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lockdep_assert_held(&ifmgd->mtx);
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}
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/*
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* We can have multiple work items (and connection probing)
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* scheduling this timer, but we need to take care to only
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* reschedule it when it should fire _earlier_ than it was
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* asked for before, or if it's not pending right now. This
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* function ensures that. Note that it then is required to
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* run this function for all timeouts after the first one
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* has happened -- the work that runs from this timer will
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* do that.
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*/
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static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
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{
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ASSERT_MGD_MTX(ifmgd);
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if (!timer_pending(&ifmgd->timer) ||
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time_before(timeout, ifmgd->timer.expires))
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mod_timer(&ifmgd->timer, timeout);
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}
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void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
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{
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if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
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return;
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if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
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return;
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mod_timer(&sdata->u.mgd.bcn_mon_timer,
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round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
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}
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void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
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{
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struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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if (unlikely(!sdata->u.mgd.associated))
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return;
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if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
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return;
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mod_timer(&sdata->u.mgd.conn_mon_timer,
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round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
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ifmgd->probe_send_count = 0;
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}
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static int ecw2cw(int ecw)
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{
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return (1 << ecw) - 1;
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}
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static u32 chandef_downgrade(struct cfg80211_chan_def *c)
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{
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u32 ret;
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int tmp;
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switch (c->width) {
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case NL80211_CHAN_WIDTH_20:
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c->width = NL80211_CHAN_WIDTH_20_NOHT;
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ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
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break;
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case NL80211_CHAN_WIDTH_40:
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c->width = NL80211_CHAN_WIDTH_20;
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c->center_freq1 = c->chan->center_freq;
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ret = IEEE80211_STA_DISABLE_40MHZ |
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IEEE80211_STA_DISABLE_VHT;
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break;
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case NL80211_CHAN_WIDTH_80:
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tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
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/* n_P40 */
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tmp /= 2;
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/* freq_P40 */
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c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
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c->width = NL80211_CHAN_WIDTH_40;
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ret = IEEE80211_STA_DISABLE_VHT;
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break;
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case NL80211_CHAN_WIDTH_80P80:
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c->center_freq2 = 0;
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c->width = NL80211_CHAN_WIDTH_80;
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ret = IEEE80211_STA_DISABLE_80P80MHZ |
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IEEE80211_STA_DISABLE_160MHZ;
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break;
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case NL80211_CHAN_WIDTH_160:
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/* n_P20 */
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tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
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/* n_P80 */
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tmp /= 4;
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c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
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c->width = NL80211_CHAN_WIDTH_80;
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ret = IEEE80211_STA_DISABLE_80P80MHZ |
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IEEE80211_STA_DISABLE_160MHZ;
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break;
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default:
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case NL80211_CHAN_WIDTH_20_NOHT:
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WARN_ON_ONCE(1);
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c->width = NL80211_CHAN_WIDTH_20_NOHT;
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ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
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break;
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}
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WARN_ON_ONCE(!cfg80211_chandef_valid(c));
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return ret;
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}
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static u32
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ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_supported_band *sband,
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struct ieee80211_channel *channel,
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const struct ieee80211_ht_operation *ht_oper,
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const struct ieee80211_vht_operation *vht_oper,
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struct cfg80211_chan_def *chandef, bool verbose)
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{
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struct cfg80211_chan_def vht_chandef;
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u32 ht_cfreq, ret;
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chandef->chan = channel;
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chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
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chandef->center_freq1 = channel->center_freq;
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chandef->center_freq2 = 0;
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if (!ht_oper || !sband->ht_cap.ht_supported) {
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ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
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goto out;
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}
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chandef->width = NL80211_CHAN_WIDTH_20;
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ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
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channel->band);
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/* check that channel matches the right operating channel */
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if (channel->center_freq != ht_cfreq) {
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/*
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* It's possible that some APs are confused here;
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* Netgear WNDR3700 sometimes reports 4 higher than
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* the actual channel in association responses, but
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* since we look at probe response/beacon data here
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* it should be OK.
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*/
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if (verbose)
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sdata_info(sdata,
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"Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
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channel->center_freq, ht_cfreq,
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ht_oper->primary_chan, channel->band);
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ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
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goto out;
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}
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/* check 40 MHz support, if we have it */
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if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
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switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
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case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
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chandef->width = NL80211_CHAN_WIDTH_40;
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chandef->center_freq1 += 10;
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break;
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case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
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chandef->width = NL80211_CHAN_WIDTH_40;
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chandef->center_freq1 -= 10;
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break;
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}
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} else {
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/* 40 MHz (and 80 MHz) must be supported for VHT */
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ret = IEEE80211_STA_DISABLE_VHT;
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goto out;
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}
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if (!vht_oper || !sband->vht_cap.vht_supported) {
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ret = IEEE80211_STA_DISABLE_VHT;
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goto out;
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}
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vht_chandef.chan = channel;
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vht_chandef.center_freq1 =
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ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
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channel->band);
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vht_chandef.center_freq2 = 0;
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if (vht_oper->center_freq_seg2_idx)
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vht_chandef.center_freq2 =
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ieee80211_channel_to_frequency(
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vht_oper->center_freq_seg2_idx,
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channel->band);
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switch (vht_oper->chan_width) {
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case IEEE80211_VHT_CHANWIDTH_USE_HT:
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vht_chandef.width = chandef->width;
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break;
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case IEEE80211_VHT_CHANWIDTH_80MHZ:
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vht_chandef.width = NL80211_CHAN_WIDTH_80;
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break;
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case IEEE80211_VHT_CHANWIDTH_160MHZ:
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vht_chandef.width = NL80211_CHAN_WIDTH_160;
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break;
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case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
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vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
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break;
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default:
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if (verbose)
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sdata_info(sdata,
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"AP VHT operation IE has invalid channel width (%d), disable VHT\n",
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vht_oper->chan_width);
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ret = IEEE80211_STA_DISABLE_VHT;
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goto out;
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}
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if (!cfg80211_chandef_valid(&vht_chandef)) {
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if (verbose)
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sdata_info(sdata,
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"AP VHT information is invalid, disable VHT\n");
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ret = IEEE80211_STA_DISABLE_VHT;
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goto out;
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}
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if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
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ret = 0;
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goto out;
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}
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if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
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if (verbose)
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sdata_info(sdata,
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"AP VHT information doesn't match HT, disable VHT\n");
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ret = IEEE80211_STA_DISABLE_VHT;
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goto out;
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}
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*chandef = vht_chandef;
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ret = 0;
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out:
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/* don't print the message below for VHT mismatch if VHT is disabled */
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if (ret & IEEE80211_STA_DISABLE_VHT)
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vht_chandef = *chandef;
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while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
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IEEE80211_CHAN_DISABLED)) {
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if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
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ret = IEEE80211_STA_DISABLE_HT |
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IEEE80211_STA_DISABLE_VHT;
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goto out;
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}
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ret |= chandef_downgrade(chandef);
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}
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if (chandef->width != vht_chandef.width && verbose)
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sdata_info(sdata,
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"capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
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WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
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return ret;
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}
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|
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static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
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struct sta_info *sta,
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const struct ieee80211_ht_operation *ht_oper,
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const struct ieee80211_vht_operation *vht_oper,
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const u8 *bssid, u32 *changed)
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{
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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struct ieee80211_supported_band *sband;
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struct ieee80211_channel *chan;
|
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struct cfg80211_chan_def chandef;
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u16 ht_opmode;
|
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u32 flags;
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enum ieee80211_sta_rx_bandwidth new_sta_bw;
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int ret;
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|
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/* if HT was/is disabled, don't track any bandwidth changes */
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if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
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return 0;
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|
|
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/* don't check VHT if we associated as non-VHT station */
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if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
|
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vht_oper = NULL;
|
|
|
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if (WARN_ON_ONCE(!sta))
|
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return -EINVAL;
|
|
|
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chan = sdata->vif.bss_conf.chandef.chan;
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sband = local->hw.wiphy->bands[chan->band];
|
|
|
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/* calculate new channel (type) based on HT/VHT operation IEs */
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flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
|
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vht_oper, &chandef, false);
|
|
|
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/*
|
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* Downgrade the new channel if we associated with restricted
|
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* capabilities. For example, if we associated as a 20 MHz STA
|
|
* to a 40 MHz AP (due to regulatory, capabilities or config
|
|
* reasons) then switching to a 40 MHz channel now won't do us
|
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* any good -- we couldn't use it with the AP.
|
|
*/
|
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if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
|
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chandef.width == NL80211_CHAN_WIDTH_80P80)
|
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flags |= chandef_downgrade(&chandef);
|
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if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
|
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chandef.width == NL80211_CHAN_WIDTH_160)
|
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flags |= chandef_downgrade(&chandef);
|
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if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
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chandef.width > NL80211_CHAN_WIDTH_20)
|
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flags |= chandef_downgrade(&chandef);
|
|
|
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if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
|
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return 0;
|
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|
|
sdata_info(sdata,
|
|
"AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
|
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ifmgd->bssid, chandef.chan->center_freq, chandef.width,
|
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chandef.center_freq1, chandef.center_freq2);
|
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|
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if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
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IEEE80211_STA_DISABLE_VHT |
|
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IEEE80211_STA_DISABLE_40MHZ |
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IEEE80211_STA_DISABLE_80P80MHZ |
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IEEE80211_STA_DISABLE_160MHZ)) ||
|
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!cfg80211_chandef_valid(&chandef)) {
|
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sdata_info(sdata,
|
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"AP %pM changed bandwidth in a way we can't support - disconnect\n",
|
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ifmgd->bssid);
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return -EINVAL;
|
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}
|
|
|
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switch (chandef.width) {
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case NL80211_CHAN_WIDTH_20_NOHT:
|
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case NL80211_CHAN_WIDTH_20:
|
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new_sta_bw = IEEE80211_STA_RX_BW_20;
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break;
|
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case NL80211_CHAN_WIDTH_40:
|
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new_sta_bw = IEEE80211_STA_RX_BW_40;
|
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break;
|
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case NL80211_CHAN_WIDTH_80:
|
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new_sta_bw = IEEE80211_STA_RX_BW_80;
|
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break;
|
|
case NL80211_CHAN_WIDTH_80P80:
|
|
case NL80211_CHAN_WIDTH_160:
|
|
new_sta_bw = IEEE80211_STA_RX_BW_160;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (new_sta_bw > sta->cur_max_bandwidth)
|
|
new_sta_bw = sta->cur_max_bandwidth;
|
|
|
|
if (new_sta_bw < sta->sta.bandwidth) {
|
|
sta->sta.bandwidth = new_sta_bw;
|
|
rate_control_rate_update(local, sband, sta,
|
|
IEEE80211_RC_BW_CHANGED);
|
|
}
|
|
|
|
ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
|
|
if (ret) {
|
|
sdata_info(sdata,
|
|
"AP %pM changed bandwidth to incompatible one - disconnect\n",
|
|
ifmgd->bssid);
|
|
return ret;
|
|
}
|
|
|
|
if (new_sta_bw > sta->sta.bandwidth) {
|
|
sta->sta.bandwidth = new_sta_bw;
|
|
rate_control_rate_update(local, sband, sta,
|
|
IEEE80211_RC_BW_CHANGED);
|
|
}
|
|
|
|
ht_opmode = le16_to_cpu(ht_oper->operation_mode);
|
|
|
|
/* if bss configuration changed store the new one */
|
|
if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
|
|
*changed |= BSS_CHANGED_HT;
|
|
sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* frame sending functions */
|
|
|
|
static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
|
|
struct ieee80211_supported_band *sband,
|
|
u32 *rates)
|
|
{
|
|
int i, j, count;
|
|
*rates = 0;
|
|
count = 0;
|
|
for (i = 0; i < supp_rates_len; i++) {
|
|
int rate = (supp_rates[i] & 0x7F) * 5;
|
|
|
|
for (j = 0; j < sband->n_bitrates; j++)
|
|
if (sband->bitrates[j].bitrate == rate) {
|
|
*rates |= BIT(j);
|
|
count++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb, u8 ap_ht_param,
|
|
struct ieee80211_supported_band *sband,
|
|
struct ieee80211_channel *channel,
|
|
enum ieee80211_smps_mode smps)
|
|
{
|
|
u8 *pos;
|
|
u32 flags = channel->flags;
|
|
u16 cap;
|
|
struct ieee80211_sta_ht_cap ht_cap;
|
|
|
|
BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
|
|
|
|
memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
|
|
ieee80211_apply_htcap_overrides(sdata, &ht_cap);
|
|
|
|
/* determine capability flags */
|
|
cap = ht_cap.cap;
|
|
|
|
switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
|
|
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
|
|
if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
|
|
cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
|
|
cap &= ~IEEE80211_HT_CAP_SGI_40;
|
|
}
|
|
break;
|
|
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
|
|
if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
|
|
cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
|
|
cap &= ~IEEE80211_HT_CAP_SGI_40;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If 40 MHz was disabled associate as though we weren't
|
|
* capable of 40 MHz -- some broken APs will never fall
|
|
* back to trying to transmit in 20 MHz.
|
|
*/
|
|
if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
|
|
cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
|
|
cap &= ~IEEE80211_HT_CAP_SGI_40;
|
|
}
|
|
|
|
/* set SM PS mode properly */
|
|
cap &= ~IEEE80211_HT_CAP_SM_PS;
|
|
switch (smps) {
|
|
case IEEE80211_SMPS_AUTOMATIC:
|
|
case IEEE80211_SMPS_NUM_MODES:
|
|
WARN_ON(1);
|
|
case IEEE80211_SMPS_OFF:
|
|
cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
|
|
IEEE80211_HT_CAP_SM_PS_SHIFT;
|
|
break;
|
|
case IEEE80211_SMPS_STATIC:
|
|
cap |= WLAN_HT_CAP_SM_PS_STATIC <<
|
|
IEEE80211_HT_CAP_SM_PS_SHIFT;
|
|
break;
|
|
case IEEE80211_SMPS_DYNAMIC:
|
|
cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
|
|
IEEE80211_HT_CAP_SM_PS_SHIFT;
|
|
break;
|
|
}
|
|
|
|
/* reserve and fill IE */
|
|
pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
|
|
ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
|
|
}
|
|
|
|
static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_supported_band *sband,
|
|
struct ieee80211_vht_cap *ap_vht_cap)
|
|
{
|
|
u8 *pos;
|
|
u32 cap;
|
|
struct ieee80211_sta_vht_cap vht_cap;
|
|
int i;
|
|
|
|
BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
|
|
|
|
memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
|
|
ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
|
|
|
|
/* determine capability flags */
|
|
cap = vht_cap.cap;
|
|
|
|
if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
|
|
cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
|
|
cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
|
|
}
|
|
|
|
if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
|
|
cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
|
|
cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
|
|
}
|
|
|
|
/*
|
|
* Some APs apparently get confused if our capabilities are better
|
|
* than theirs, so restrict what we advertise in the assoc request.
|
|
*/
|
|
if (!(ap_vht_cap->vht_cap_info &
|
|
cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
|
|
cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
|
|
|
|
if (!(ap_vht_cap->vht_cap_info &
|
|
cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
|
|
cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
|
|
IEEE80211_VHT_CAP_RXSTBC_3 |
|
|
IEEE80211_VHT_CAP_RXSTBC_4);
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
int shift = i * 2;
|
|
u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
|
|
u16 ap_mcs, our_mcs;
|
|
|
|
ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
|
|
mask) >> shift;
|
|
our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
|
|
mask) >> shift;
|
|
|
|
if (our_mcs == IEEE80211_VHT_MCS_NOT_SUPPORTED)
|
|
continue;
|
|
|
|
switch (ap_mcs) {
|
|
default:
|
|
if (our_mcs <= ap_mcs)
|
|
break;
|
|
/* fall through */
|
|
case IEEE80211_VHT_MCS_NOT_SUPPORTED:
|
|
vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
|
|
vht_cap.vht_mcs.rx_mcs_map |=
|
|
cpu_to_le16(ap_mcs << shift);
|
|
}
|
|
}
|
|
|
|
/* reserve and fill IE */
|
|
pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
|
|
ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
|
|
}
|
|
|
|
static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_mgmt *mgmt;
|
|
u8 *pos, qos_info;
|
|
size_t offset = 0, noffset;
|
|
int i, count, rates_len, supp_rates_len;
|
|
u16 capab;
|
|
struct ieee80211_supported_band *sband;
|
|
struct ieee80211_chanctx_conf *chanctx_conf;
|
|
struct ieee80211_channel *chan;
|
|
u32 rates = 0;
|
|
|
|
lockdep_assert_held(&ifmgd->mtx);
|
|
|
|
rcu_read_lock();
|
|
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
|
|
if (WARN_ON(!chanctx_conf)) {
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
chan = chanctx_conf->def.chan;
|
|
rcu_read_unlock();
|
|
sband = local->hw.wiphy->bands[chan->band];
|
|
|
|
if (assoc_data->supp_rates_len) {
|
|
/*
|
|
* Get all rates supported by the device and the AP as
|
|
* some APs don't like getting a superset of their rates
|
|
* in the association request (e.g. D-Link DAP 1353 in
|
|
* b-only mode)...
|
|
*/
|
|
rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
|
|
assoc_data->supp_rates_len,
|
|
sband, &rates);
|
|
} else {
|
|
/*
|
|
* In case AP not provide any supported rates information
|
|
* before association, we send information element(s) with
|
|
* all rates that we support.
|
|
*/
|
|
rates = ~0;
|
|
rates_len = sband->n_bitrates;
|
|
}
|
|
|
|
skb = alloc_skb(local->hw.extra_tx_headroom +
|
|
sizeof(*mgmt) + /* bit too much but doesn't matter */
|
|
2 + assoc_data->ssid_len + /* SSID */
|
|
4 + rates_len + /* (extended) rates */
|
|
4 + /* power capability */
|
|
2 + 2 * sband->n_channels + /* supported channels */
|
|
2 + sizeof(struct ieee80211_ht_cap) + /* HT */
|
|
2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
|
|
assoc_data->ie_len + /* extra IEs */
|
|
9, /* WMM */
|
|
GFP_KERNEL);
|
|
if (!skb)
|
|
return;
|
|
|
|
skb_reserve(skb, local->hw.extra_tx_headroom);
|
|
|
|
capab = WLAN_CAPABILITY_ESS;
|
|
|
|
if (sband->band == IEEE80211_BAND_2GHZ) {
|
|
if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
|
|
capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
|
|
if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
|
|
capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
|
|
}
|
|
|
|
if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
|
|
capab |= WLAN_CAPABILITY_PRIVACY;
|
|
|
|
if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
|
|
(local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
|
|
capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
|
|
|
|
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
|
|
memset(mgmt, 0, 24);
|
|
memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
|
|
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
|
|
memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
|
|
|
|
if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
|
|
skb_put(skb, 10);
|
|
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
|
|
IEEE80211_STYPE_REASSOC_REQ);
|
|
mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
|
|
mgmt->u.reassoc_req.listen_interval =
|
|
cpu_to_le16(local->hw.conf.listen_interval);
|
|
memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
|
|
ETH_ALEN);
|
|
} else {
|
|
skb_put(skb, 4);
|
|
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
|
|
IEEE80211_STYPE_ASSOC_REQ);
|
|
mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
|
|
mgmt->u.assoc_req.listen_interval =
|
|
cpu_to_le16(local->hw.conf.listen_interval);
|
|
}
|
|
|
|
/* SSID */
|
|
pos = skb_put(skb, 2 + assoc_data->ssid_len);
|
|
*pos++ = WLAN_EID_SSID;
|
|
*pos++ = assoc_data->ssid_len;
|
|
memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
|
|
|
|
/* add all rates which were marked to be used above */
|
|
supp_rates_len = rates_len;
|
|
if (supp_rates_len > 8)
|
|
supp_rates_len = 8;
|
|
|
|
pos = skb_put(skb, supp_rates_len + 2);
|
|
*pos++ = WLAN_EID_SUPP_RATES;
|
|
*pos++ = supp_rates_len;
|
|
|
|
count = 0;
|
|
for (i = 0; i < sband->n_bitrates; i++) {
|
|
if (BIT(i) & rates) {
|
|
int rate = sband->bitrates[i].bitrate;
|
|
*pos++ = (u8) (rate / 5);
|
|
if (++count == 8)
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (rates_len > count) {
|
|
pos = skb_put(skb, rates_len - count + 2);
|
|
*pos++ = WLAN_EID_EXT_SUPP_RATES;
|
|
*pos++ = rates_len - count;
|
|
|
|
for (i++; i < sband->n_bitrates; i++) {
|
|
if (BIT(i) & rates) {
|
|
int rate = sband->bitrates[i].bitrate;
|
|
*pos++ = (u8) (rate / 5);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
|
|
/* 1. power capabilities */
|
|
pos = skb_put(skb, 4);
|
|
*pos++ = WLAN_EID_PWR_CAPABILITY;
|
|
*pos++ = 2;
|
|
*pos++ = 0; /* min tx power */
|
|
*pos++ = chan->max_power; /* max tx power */
|
|
|
|
/* 2. supported channels */
|
|
/* TODO: get this in reg domain format */
|
|
pos = skb_put(skb, 2 * sband->n_channels + 2);
|
|
*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
|
|
*pos++ = 2 * sband->n_channels;
|
|
for (i = 0; i < sband->n_channels; i++) {
|
|
*pos++ = ieee80211_frequency_to_channel(
|
|
sband->channels[i].center_freq);
|
|
*pos++ = 1; /* one channel in the subband*/
|
|
}
|
|
}
|
|
|
|
/* if present, add any custom IEs that go before HT */
|
|
if (assoc_data->ie_len && assoc_data->ie) {
|
|
static const u8 before_ht[] = {
|
|
WLAN_EID_SSID,
|
|
WLAN_EID_SUPP_RATES,
|
|
WLAN_EID_EXT_SUPP_RATES,
|
|
WLAN_EID_PWR_CAPABILITY,
|
|
WLAN_EID_SUPPORTED_CHANNELS,
|
|
WLAN_EID_RSN,
|
|
WLAN_EID_QOS_CAPA,
|
|
WLAN_EID_RRM_ENABLED_CAPABILITIES,
|
|
WLAN_EID_MOBILITY_DOMAIN,
|
|
WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
|
|
};
|
|
noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
|
|
before_ht, ARRAY_SIZE(before_ht),
|
|
offset);
|
|
pos = skb_put(skb, noffset - offset);
|
|
memcpy(pos, assoc_data->ie + offset, noffset - offset);
|
|
offset = noffset;
|
|
}
|
|
|
|
if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
|
|
!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
|
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
|
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
|
|
ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
|
|
sband, chan, sdata->smps_mode);
|
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
|
|
ieee80211_add_vht_ie(sdata, skb, sband,
|
|
&assoc_data->ap_vht_cap);
|
|
|
|
/* if present, add any custom non-vendor IEs that go after HT */
|
|
if (assoc_data->ie_len && assoc_data->ie) {
|
|
noffset = ieee80211_ie_split_vendor(assoc_data->ie,
|
|
assoc_data->ie_len,
|
|
offset);
|
|
pos = skb_put(skb, noffset - offset);
|
|
memcpy(pos, assoc_data->ie + offset, noffset - offset);
|
|
offset = noffset;
|
|
}
|
|
|
|
if (assoc_data->wmm) {
|
|
if (assoc_data->uapsd) {
|
|
qos_info = ifmgd->uapsd_queues;
|
|
qos_info |= (ifmgd->uapsd_max_sp_len <<
|
|
IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
|
|
} else {
|
|
qos_info = 0;
|
|
}
|
|
|
|
pos = skb_put(skb, 9);
|
|
*pos++ = WLAN_EID_VENDOR_SPECIFIC;
|
|
*pos++ = 7; /* len */
|
|
*pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
|
|
*pos++ = 0x50;
|
|
*pos++ = 0xf2;
|
|
*pos++ = 2; /* WME */
|
|
*pos++ = 0; /* WME info */
|
|
*pos++ = 1; /* WME ver */
|
|
*pos++ = qos_info;
|
|
}
|
|
|
|
/* add any remaining custom (i.e. vendor specific here) IEs */
|
|
if (assoc_data->ie_len && assoc_data->ie) {
|
|
noffset = assoc_data->ie_len;
|
|
pos = skb_put(skb, noffset - offset);
|
|
memcpy(pos, assoc_data->ie + offset, noffset - offset);
|
|
}
|
|
|
|
drv_mgd_prepare_tx(local, sdata);
|
|
|
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
|
|
if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
|
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
|
|
IEEE80211_TX_INTFL_MLME_CONN_TX;
|
|
ieee80211_tx_skb(sdata, skb);
|
|
}
|
|
|
|
void ieee80211_send_pspoll(struct ieee80211_local *local,
|
|
struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_pspoll *pspoll;
|
|
struct sk_buff *skb;
|
|
|
|
skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
|
|
if (!skb)
|
|
return;
|
|
|
|
pspoll = (struct ieee80211_pspoll *) skb->data;
|
|
pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
|
|
|
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
|
|
ieee80211_tx_skb(sdata, skb);
|
|
}
|
|
|
|
void ieee80211_send_nullfunc(struct ieee80211_local *local,
|
|
struct ieee80211_sub_if_data *sdata,
|
|
int powersave)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct ieee80211_hdr_3addr *nullfunc;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
|
|
if (!skb)
|
|
return;
|
|
|
|
nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
|
|
if (powersave)
|
|
nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
|
|
|
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
|
|
IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
|
|
if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
|
|
IEEE80211_STA_CONNECTION_POLL))
|
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
|
|
|
|
ieee80211_tx_skb(sdata, skb);
|
|
}
|
|
|
|
static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
|
|
struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct ieee80211_hdr *nullfunc;
|
|
__le16 fc;
|
|
|
|
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
|
|
return;
|
|
|
|
skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
|
|
if (!skb)
|
|
return;
|
|
|
|
skb_reserve(skb, local->hw.extra_tx_headroom);
|
|
|
|
nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
|
|
memset(nullfunc, 0, 30);
|
|
fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
|
|
IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
|
|
nullfunc->frame_control = fc;
|
|
memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
|
|
memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
|
|
memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
|
|
memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
|
|
|
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
|
|
ieee80211_tx_skb(sdata, skb);
|
|
}
|
|
|
|
/* spectrum management related things */
|
|
static void ieee80211_chswitch_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
if (!ieee80211_sdata_running(sdata))
|
|
return;
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
if (!ifmgd->associated)
|
|
goto out;
|
|
|
|
sdata->local->_oper_channel = sdata->local->csa_channel;
|
|
if (!sdata->local->ops->channel_switch) {
|
|
/* call "hw_config" only if doing sw channel switch */
|
|
ieee80211_hw_config(sdata->local,
|
|
IEEE80211_CONF_CHANGE_CHANNEL);
|
|
} else {
|
|
/* update the device channel directly */
|
|
sdata->local->hw.conf.channel = sdata->local->_oper_channel;
|
|
}
|
|
|
|
/* XXX: shouldn't really modify cfg80211-owned data! */
|
|
ifmgd->associated->channel = sdata->local->_oper_channel;
|
|
|
|
/* XXX: wait for a beacon first? */
|
|
ieee80211_wake_queues_by_reason(&sdata->local->hw,
|
|
IEEE80211_QUEUE_STOP_REASON_CSA);
|
|
out:
|
|
ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
|
|
mutex_unlock(&ifmgd->mtx);
|
|
}
|
|
|
|
void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
trace_api_chswitch_done(sdata, success);
|
|
if (!success) {
|
|
sdata_info(sdata,
|
|
"driver channel switch failed, disconnecting\n");
|
|
ieee80211_queue_work(&sdata->local->hw,
|
|
&ifmgd->csa_connection_drop_work);
|
|
} else {
|
|
ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_chswitch_done);
|
|
|
|
static void ieee80211_chswitch_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
(struct ieee80211_sub_if_data *) data;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
if (sdata->local->quiescing) {
|
|
set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
|
|
return;
|
|
}
|
|
|
|
ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
|
|
}
|
|
|
|
void
|
|
ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
|
|
const struct ieee80211_channel_sw_ie *sw_elem,
|
|
struct ieee80211_bss *bss, u64 timestamp)
|
|
{
|
|
struct cfg80211_bss *cbss =
|
|
container_of((void *)bss, struct cfg80211_bss, priv);
|
|
struct ieee80211_channel *new_ch;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
|
|
cbss->channel->band);
|
|
struct ieee80211_chanctx *chanctx;
|
|
|
|
ASSERT_MGD_MTX(ifmgd);
|
|
|
|
if (!ifmgd->associated)
|
|
return;
|
|
|
|
if (sdata->local->scanning)
|
|
return;
|
|
|
|
/* Disregard subsequent beacons if we are already running a timer
|
|
processing a CSA */
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
|
|
return;
|
|
|
|
new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
|
|
if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
|
|
sdata_info(sdata,
|
|
"AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
|
|
ifmgd->associated->bssid, new_freq);
|
|
ieee80211_queue_work(&sdata->local->hw,
|
|
&ifmgd->csa_connection_drop_work);
|
|
return;
|
|
}
|
|
|
|
ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
|
|
|
|
if (sdata->local->use_chanctx) {
|
|
sdata_info(sdata,
|
|
"not handling channel switch with channel contexts\n");
|
|
ieee80211_queue_work(&sdata->local->hw,
|
|
&ifmgd->csa_connection_drop_work);
|
|
return;
|
|
}
|
|
|
|
mutex_lock(&sdata->local->chanctx_mtx);
|
|
if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
|
|
mutex_unlock(&sdata->local->chanctx_mtx);
|
|
return;
|
|
}
|
|
chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
|
|
struct ieee80211_chanctx, conf);
|
|
if (chanctx->refcount > 1) {
|
|
sdata_info(sdata,
|
|
"channel switch with multiple interfaces on the same channel, disconnecting\n");
|
|
ieee80211_queue_work(&sdata->local->hw,
|
|
&ifmgd->csa_connection_drop_work);
|
|
mutex_unlock(&sdata->local->chanctx_mtx);
|
|
return;
|
|
}
|
|
mutex_unlock(&sdata->local->chanctx_mtx);
|
|
|
|
sdata->local->csa_channel = new_ch;
|
|
|
|
if (sw_elem->mode)
|
|
ieee80211_stop_queues_by_reason(&sdata->local->hw,
|
|
IEEE80211_QUEUE_STOP_REASON_CSA);
|
|
|
|
if (sdata->local->ops->channel_switch) {
|
|
/* use driver's channel switch callback */
|
|
struct ieee80211_channel_switch ch_switch = {
|
|
.timestamp = timestamp,
|
|
.block_tx = sw_elem->mode,
|
|
.channel = new_ch,
|
|
.count = sw_elem->count,
|
|
};
|
|
|
|
drv_channel_switch(sdata->local, &ch_switch);
|
|
return;
|
|
}
|
|
|
|
/* channel switch handled in software */
|
|
if (sw_elem->count <= 1)
|
|
ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
|
|
else
|
|
mod_timer(&ifmgd->chswitch_timer,
|
|
TU_TO_EXP_TIME(sw_elem->count *
|
|
cbss->beacon_interval));
|
|
}
|
|
|
|
static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_channel *channel,
|
|
const u8 *country_ie, u8 country_ie_len,
|
|
const u8 *pwr_constr_elem)
|
|
{
|
|
struct ieee80211_country_ie_triplet *triplet;
|
|
int chan = ieee80211_frequency_to_channel(channel->center_freq);
|
|
int i, chan_pwr, chan_increment, new_ap_level;
|
|
bool have_chan_pwr = false;
|
|
|
|
/* Invalid IE */
|
|
if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
|
|
return 0;
|
|
|
|
triplet = (void *)(country_ie + 3);
|
|
country_ie_len -= 3;
|
|
|
|
switch (channel->band) {
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
/* fall through */
|
|
case IEEE80211_BAND_2GHZ:
|
|
case IEEE80211_BAND_60GHZ:
|
|
chan_increment = 1;
|
|
break;
|
|
case IEEE80211_BAND_5GHZ:
|
|
chan_increment = 4;
|
|
break;
|
|
}
|
|
|
|
/* find channel */
|
|
while (country_ie_len >= 3) {
|
|
u8 first_channel = triplet->chans.first_channel;
|
|
|
|
if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
|
|
goto next;
|
|
|
|
for (i = 0; i < triplet->chans.num_channels; i++) {
|
|
if (first_channel + i * chan_increment == chan) {
|
|
have_chan_pwr = true;
|
|
chan_pwr = triplet->chans.max_power;
|
|
break;
|
|
}
|
|
}
|
|
if (have_chan_pwr)
|
|
break;
|
|
|
|
next:
|
|
triplet++;
|
|
country_ie_len -= 3;
|
|
}
|
|
|
|
if (!have_chan_pwr)
|
|
return 0;
|
|
|
|
new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
|
|
|
|
if (sdata->ap_power_level == new_ap_level)
|
|
return 0;
|
|
|
|
sdata_info(sdata,
|
|
"Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
|
|
new_ap_level, chan_pwr, *pwr_constr_elem,
|
|
sdata->u.mgd.bssid);
|
|
sdata->ap_power_level = new_ap_level;
|
|
if (__ieee80211_recalc_txpower(sdata))
|
|
return BSS_CHANGED_TXPOWER;
|
|
return 0;
|
|
}
|
|
|
|
/* powersave */
|
|
static void ieee80211_enable_ps(struct ieee80211_local *local,
|
|
struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_conf *conf = &local->hw.conf;
|
|
|
|
/*
|
|
* If we are scanning right now then the parameters will
|
|
* take effect when scan finishes.
|
|
*/
|
|
if (local->scanning)
|
|
return;
|
|
|
|
if (conf->dynamic_ps_timeout > 0 &&
|
|
!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
|
|
mod_timer(&local->dynamic_ps_timer, jiffies +
|
|
msecs_to_jiffies(conf->dynamic_ps_timeout));
|
|
} else {
|
|
if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
|
|
ieee80211_send_nullfunc(local, sdata, 1);
|
|
|
|
if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
|
|
(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
|
|
return;
|
|
|
|
conf->flags |= IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
|
}
|
|
}
|
|
|
|
static void ieee80211_change_ps(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_conf *conf = &local->hw.conf;
|
|
|
|
if (local->ps_sdata) {
|
|
ieee80211_enable_ps(local, local->ps_sdata);
|
|
} else if (conf->flags & IEEE80211_CONF_PS) {
|
|
conf->flags &= ~IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
|
del_timer_sync(&local->dynamic_ps_timer);
|
|
cancel_work_sync(&local->dynamic_ps_enable_work);
|
|
}
|
|
}
|
|
|
|
static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *mgd = &sdata->u.mgd;
|
|
struct sta_info *sta = NULL;
|
|
bool authorized = false;
|
|
|
|
if (!mgd->powersave)
|
|
return false;
|
|
|
|
if (mgd->broken_ap)
|
|
return false;
|
|
|
|
if (!mgd->associated)
|
|
return false;
|
|
|
|
if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
|
|
IEEE80211_STA_CONNECTION_POLL))
|
|
return false;
|
|
|
|
rcu_read_lock();
|
|
sta = sta_info_get(sdata, mgd->bssid);
|
|
if (sta)
|
|
authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
|
|
rcu_read_unlock();
|
|
|
|
return authorized;
|
|
}
|
|
|
|
/* need to hold RTNL or interface lock */
|
|
void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata, *found = NULL;
|
|
int count = 0;
|
|
int timeout;
|
|
|
|
if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
|
|
local->ps_sdata = NULL;
|
|
return;
|
|
}
|
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (!ieee80211_sdata_running(sdata))
|
|
continue;
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP) {
|
|
/* If an AP vif is found, then disable PS
|
|
* by setting the count to zero thereby setting
|
|
* ps_sdata to NULL.
|
|
*/
|
|
count = 0;
|
|
break;
|
|
}
|
|
if (sdata->vif.type != NL80211_IFTYPE_STATION)
|
|
continue;
|
|
found = sdata;
|
|
count++;
|
|
}
|
|
|
|
if (count == 1 && ieee80211_powersave_allowed(found)) {
|
|
s32 beaconint_us;
|
|
|
|
if (latency < 0)
|
|
latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
|
|
|
|
beaconint_us = ieee80211_tu_to_usec(
|
|
found->vif.bss_conf.beacon_int);
|
|
|
|
timeout = local->dynamic_ps_forced_timeout;
|
|
if (timeout < 0) {
|
|
/*
|
|
* Go to full PSM if the user configures a very low
|
|
* latency requirement.
|
|
* The 2000 second value is there for compatibility
|
|
* until the PM_QOS_NETWORK_LATENCY is configured
|
|
* with real values.
|
|
*/
|
|
if (latency > (1900 * USEC_PER_MSEC) &&
|
|
latency != (2000 * USEC_PER_SEC))
|
|
timeout = 0;
|
|
else
|
|
timeout = 100;
|
|
}
|
|
local->hw.conf.dynamic_ps_timeout = timeout;
|
|
|
|
if (beaconint_us > latency) {
|
|
local->ps_sdata = NULL;
|
|
} else {
|
|
int maxslp = 1;
|
|
u8 dtimper = found->u.mgd.dtim_period;
|
|
|
|
/* If the TIM IE is invalid, pretend the value is 1 */
|
|
if (!dtimper)
|
|
dtimper = 1;
|
|
else if (dtimper > 1)
|
|
maxslp = min_t(int, dtimper,
|
|
latency / beaconint_us);
|
|
|
|
local->hw.conf.max_sleep_period = maxslp;
|
|
local->hw.conf.ps_dtim_period = dtimper;
|
|
local->ps_sdata = found;
|
|
}
|
|
} else {
|
|
local->ps_sdata = NULL;
|
|
}
|
|
|
|
ieee80211_change_ps(local);
|
|
}
|
|
|
|
void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
bool ps_allowed = ieee80211_powersave_allowed(sdata);
|
|
|
|
if (sdata->vif.bss_conf.ps != ps_allowed) {
|
|
sdata->vif.bss_conf.ps = ps_allowed;
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
|
|
}
|
|
}
|
|
|
|
void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_local *local =
|
|
container_of(work, struct ieee80211_local,
|
|
dynamic_ps_disable_work);
|
|
|
|
if (local->hw.conf.flags & IEEE80211_CONF_PS) {
|
|
local->hw.conf.flags &= ~IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
|
}
|
|
|
|
ieee80211_wake_queues_by_reason(&local->hw,
|
|
IEEE80211_QUEUE_STOP_REASON_PS);
|
|
}
|
|
|
|
void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_local *local =
|
|
container_of(work, struct ieee80211_local,
|
|
dynamic_ps_enable_work);
|
|
struct ieee80211_sub_if_data *sdata = local->ps_sdata;
|
|
struct ieee80211_if_managed *ifmgd;
|
|
unsigned long flags;
|
|
int q;
|
|
|
|
/* can only happen when PS was just disabled anyway */
|
|
if (!sdata)
|
|
return;
|
|
|
|
ifmgd = &sdata->u.mgd;
|
|
|
|
if (local->hw.conf.flags & IEEE80211_CONF_PS)
|
|
return;
|
|
|
|
if (local->hw.conf.dynamic_ps_timeout > 0) {
|
|
/* don't enter PS if TX frames are pending */
|
|
if (drv_tx_frames_pending(local)) {
|
|
mod_timer(&local->dynamic_ps_timer, jiffies +
|
|
msecs_to_jiffies(
|
|
local->hw.conf.dynamic_ps_timeout));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* transmission can be stopped by others which leads to
|
|
* dynamic_ps_timer expiry. Postpone the ps timer if it
|
|
* is not the actual idle state.
|
|
*/
|
|
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
|
|
for (q = 0; q < local->hw.queues; q++) {
|
|
if (local->queue_stop_reasons[q]) {
|
|
spin_unlock_irqrestore(&local->queue_stop_reason_lock,
|
|
flags);
|
|
mod_timer(&local->dynamic_ps_timer, jiffies +
|
|
msecs_to_jiffies(
|
|
local->hw.conf.dynamic_ps_timeout));
|
|
return;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
|
|
}
|
|
|
|
if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
|
|
!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
|
|
netif_tx_stop_all_queues(sdata->dev);
|
|
|
|
if (drv_tx_frames_pending(local))
|
|
mod_timer(&local->dynamic_ps_timer, jiffies +
|
|
msecs_to_jiffies(
|
|
local->hw.conf.dynamic_ps_timeout));
|
|
else {
|
|
ieee80211_send_nullfunc(local, sdata, 1);
|
|
/* Flush to get the tx status of nullfunc frame */
|
|
drv_flush(local, false);
|
|
}
|
|
}
|
|
|
|
if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
|
|
(local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
|
|
(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
|
|
ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
|
|
local->hw.conf.flags |= IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
|
}
|
|
|
|
if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
|
|
netif_tx_wake_all_queues(sdata->dev);
|
|
}
|
|
|
|
void ieee80211_dynamic_ps_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_local *local = (void *) data;
|
|
|
|
if (local->quiescing || local->suspended)
|
|
return;
|
|
|
|
ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
|
|
}
|
|
|
|
void ieee80211_dfs_cac_timer_work(struct work_struct *work)
|
|
{
|
|
struct delayed_work *delayed_work =
|
|
container_of(work, struct delayed_work, work);
|
|
struct ieee80211_sub_if_data *sdata =
|
|
container_of(delayed_work, struct ieee80211_sub_if_data,
|
|
dfs_cac_timer_work);
|
|
|
|
ieee80211_vif_release_channel(sdata);
|
|
|
|
cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
|
|
}
|
|
|
|
/* MLME */
|
|
static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
|
|
struct ieee80211_sub_if_data *sdata,
|
|
const u8 *wmm_param, size_t wmm_param_len)
|
|
{
|
|
struct ieee80211_tx_queue_params params;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
size_t left;
|
|
int count;
|
|
const u8 *pos;
|
|
u8 uapsd_queues = 0;
|
|
|
|
if (!local->ops->conf_tx)
|
|
return false;
|
|
|
|
if (local->hw.queues < IEEE80211_NUM_ACS)
|
|
return false;
|
|
|
|
if (!wmm_param)
|
|
return false;
|
|
|
|
if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
|
|
return false;
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
|
|
uapsd_queues = ifmgd->uapsd_queues;
|
|
|
|
count = wmm_param[6] & 0x0f;
|
|
if (count == ifmgd->wmm_last_param_set)
|
|
return false;
|
|
ifmgd->wmm_last_param_set = count;
|
|
|
|
pos = wmm_param + 8;
|
|
left = wmm_param_len - 8;
|
|
|
|
memset(¶ms, 0, sizeof(params));
|
|
|
|
sdata->wmm_acm = 0;
|
|
for (; left >= 4; left -= 4, pos += 4) {
|
|
int aci = (pos[0] >> 5) & 0x03;
|
|
int acm = (pos[0] >> 4) & 0x01;
|
|
bool uapsd = false;
|
|
int queue;
|
|
|
|
switch (aci) {
|
|
case 1: /* AC_BK */
|
|
queue = 3;
|
|
if (acm)
|
|
sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
|
|
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
|
|
uapsd = true;
|
|
break;
|
|
case 2: /* AC_VI */
|
|
queue = 1;
|
|
if (acm)
|
|
sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
|
|
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
|
|
uapsd = true;
|
|
break;
|
|
case 3: /* AC_VO */
|
|
queue = 0;
|
|
if (acm)
|
|
sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
|
|
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
|
|
uapsd = true;
|
|
break;
|
|
case 0: /* AC_BE */
|
|
default:
|
|
queue = 2;
|
|
if (acm)
|
|
sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
|
|
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
|
|
uapsd = true;
|
|
break;
|
|
}
|
|
|
|
params.aifs = pos[0] & 0x0f;
|
|
params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
|
|
params.cw_min = ecw2cw(pos[1] & 0x0f);
|
|
params.txop = get_unaligned_le16(pos + 2);
|
|
params.uapsd = uapsd;
|
|
|
|
mlme_dbg(sdata,
|
|
"WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
|
|
queue, aci, acm,
|
|
params.aifs, params.cw_min, params.cw_max,
|
|
params.txop, params.uapsd);
|
|
sdata->tx_conf[queue] = params;
|
|
if (drv_conf_tx(local, sdata, queue, ¶ms))
|
|
sdata_err(sdata,
|
|
"failed to set TX queue parameters for queue %d\n",
|
|
queue);
|
|
}
|
|
|
|
/* enable WMM or activate new settings */
|
|
sdata->vif.bss_conf.qos = true;
|
|
return true;
|
|
}
|
|
|
|
static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
lockdep_assert_held(&sdata->local->mtx);
|
|
|
|
sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
|
|
IEEE80211_STA_BEACON_POLL);
|
|
ieee80211_run_deferred_scan(sdata->local);
|
|
}
|
|
|
|
static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
mutex_lock(&sdata->local->mtx);
|
|
__ieee80211_stop_poll(sdata);
|
|
mutex_unlock(&sdata->local->mtx);
|
|
}
|
|
|
|
static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
|
|
u16 capab, bool erp_valid, u8 erp)
|
|
{
|
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
|
|
u32 changed = 0;
|
|
bool use_protection;
|
|
bool use_short_preamble;
|
|
bool use_short_slot;
|
|
|
|
if (erp_valid) {
|
|
use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
|
|
use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
|
|
} else {
|
|
use_protection = false;
|
|
use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
|
|
}
|
|
|
|
use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
|
|
if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
|
|
use_short_slot = true;
|
|
|
|
if (use_protection != bss_conf->use_cts_prot) {
|
|
bss_conf->use_cts_prot = use_protection;
|
|
changed |= BSS_CHANGED_ERP_CTS_PROT;
|
|
}
|
|
|
|
if (use_short_preamble != bss_conf->use_short_preamble) {
|
|
bss_conf->use_short_preamble = use_short_preamble;
|
|
changed |= BSS_CHANGED_ERP_PREAMBLE;
|
|
}
|
|
|
|
if (use_short_slot != bss_conf->use_short_slot) {
|
|
bss_conf->use_short_slot = use_short_slot;
|
|
changed |= BSS_CHANGED_ERP_SLOT;
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_bss *cbss,
|
|
u32 bss_info_changed)
|
|
{
|
|
struct ieee80211_bss *bss = (void *)cbss->priv;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
|
|
|
|
bss_info_changed |= BSS_CHANGED_ASSOC;
|
|
bss_info_changed |= ieee80211_handle_bss_capability(sdata,
|
|
bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
|
|
|
|
sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
|
|
IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
|
|
|
|
sdata->u.mgd.associated = cbss;
|
|
memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
|
|
|
|
sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
|
|
|
|
if (sdata->vif.p2p) {
|
|
const struct cfg80211_bss_ies *ies;
|
|
|
|
rcu_read_lock();
|
|
ies = rcu_dereference(cbss->ies);
|
|
if (ies) {
|
|
u8 noa[2];
|
|
int ret;
|
|
|
|
ret = cfg80211_get_p2p_attr(
|
|
ies->data, ies->len,
|
|
IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
|
|
noa, sizeof(noa));
|
|
if (ret >= 2) {
|
|
bss_conf->p2p_oppps = noa[1] & 0x80;
|
|
bss_conf->p2p_ctwindow = noa[1] & 0x7f;
|
|
bss_info_changed |= BSS_CHANGED_P2P_PS;
|
|
sdata->u.mgd.p2p_noa_index = noa[0];
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
/* just to be sure */
|
|
ieee80211_stop_poll(sdata);
|
|
|
|
ieee80211_led_assoc(local, 1);
|
|
|
|
if (sdata->u.mgd.assoc_data->have_beacon) {
|
|
/*
|
|
* If the AP is buggy we may get here with no DTIM period
|
|
* known, so assume it's 1 which is the only safe assumption
|
|
* in that case, although if the TIM IE is broken powersave
|
|
* probably just won't work at all.
|
|
*/
|
|
bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
|
|
bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
|
|
} else {
|
|
bss_conf->dtim_period = 0;
|
|
}
|
|
|
|
bss_conf->assoc = 1;
|
|
|
|
/* Tell the driver to monitor connection quality (if supported) */
|
|
if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
|
|
bss_conf->cqm_rssi_thold)
|
|
bss_info_changed |= BSS_CHANGED_CQM;
|
|
|
|
/* Enable ARP filtering */
|
|
if (bss_conf->arp_addr_cnt)
|
|
bss_info_changed |= BSS_CHANGED_ARP_FILTER;
|
|
|
|
ieee80211_bss_info_change_notify(sdata, bss_info_changed);
|
|
|
|
mutex_lock(&local->iflist_mtx);
|
|
ieee80211_recalc_ps(local, -1);
|
|
mutex_unlock(&local->iflist_mtx);
|
|
|
|
ieee80211_recalc_smps(sdata);
|
|
ieee80211_recalc_ps_vif(sdata);
|
|
|
|
netif_tx_start_all_queues(sdata->dev);
|
|
netif_carrier_on(sdata->dev);
|
|
}
|
|
|
|
static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
|
|
u16 stype, u16 reason, bool tx,
|
|
u8 *frame_buf)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
u32 changed = 0;
|
|
|
|
ASSERT_MGD_MTX(ifmgd);
|
|
|
|
if (WARN_ON_ONCE(tx && !frame_buf))
|
|
return;
|
|
|
|
if (WARN_ON(!ifmgd->associated))
|
|
return;
|
|
|
|
ieee80211_stop_poll(sdata);
|
|
|
|
ifmgd->associated = NULL;
|
|
|
|
/*
|
|
* we need to commit the associated = NULL change because the
|
|
* scan code uses that to determine whether this iface should
|
|
* go to/wake up from powersave or not -- and could otherwise
|
|
* wake the queues erroneously.
|
|
*/
|
|
smp_mb();
|
|
|
|
/*
|
|
* Thus, we can only afterwards stop the queues -- to account
|
|
* for the case where another CPU is finishing a scan at this
|
|
* time -- we don't want the scan code to enable queues.
|
|
*/
|
|
|
|
netif_tx_stop_all_queues(sdata->dev);
|
|
netif_carrier_off(sdata->dev);
|
|
|
|
/*
|
|
* if we want to get out of ps before disassoc (why?) we have
|
|
* to do it before sending disassoc, as otherwise the null-packet
|
|
* won't be valid.
|
|
*/
|
|
if (local->hw.conf.flags & IEEE80211_CONF_PS) {
|
|
local->hw.conf.flags &= ~IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
|
}
|
|
local->ps_sdata = NULL;
|
|
|
|
/* disable per-vif ps */
|
|
ieee80211_recalc_ps_vif(sdata);
|
|
|
|
/* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
|
|
if (tx)
|
|
drv_flush(local, false);
|
|
|
|
/* deauthenticate/disassociate now */
|
|
if (tx || frame_buf)
|
|
ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
|
|
reason, tx, frame_buf);
|
|
|
|
/* flush out frame */
|
|
if (tx)
|
|
drv_flush(local, false);
|
|
|
|
/* clear bssid only after building the needed mgmt frames */
|
|
memset(ifmgd->bssid, 0, ETH_ALEN);
|
|
|
|
/* remove AP and TDLS peers */
|
|
sta_info_flush_defer(sdata);
|
|
|
|
/* finally reset all BSS / config parameters */
|
|
changed |= ieee80211_reset_erp_info(sdata);
|
|
|
|
ieee80211_led_assoc(local, 0);
|
|
changed |= BSS_CHANGED_ASSOC;
|
|
sdata->vif.bss_conf.assoc = false;
|
|
|
|
sdata->vif.bss_conf.p2p_ctwindow = 0;
|
|
sdata->vif.bss_conf.p2p_oppps = false;
|
|
|
|
/* on the next assoc, re-program HT/VHT parameters */
|
|
memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
|
|
memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
|
|
memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
|
|
memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
|
|
|
|
sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
|
|
|
|
del_timer_sync(&local->dynamic_ps_timer);
|
|
cancel_work_sync(&local->dynamic_ps_enable_work);
|
|
|
|
/* Disable ARP filtering */
|
|
if (sdata->vif.bss_conf.arp_addr_cnt)
|
|
changed |= BSS_CHANGED_ARP_FILTER;
|
|
|
|
sdata->vif.bss_conf.qos = false;
|
|
changed |= BSS_CHANGED_QOS;
|
|
|
|
/* The BSSID (not really interesting) and HT changed */
|
|
changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
|
|
/* disassociated - set to defaults now */
|
|
ieee80211_set_wmm_default(sdata, false);
|
|
|
|
del_timer_sync(&sdata->u.mgd.conn_mon_timer);
|
|
del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
|
|
del_timer_sync(&sdata->u.mgd.timer);
|
|
del_timer_sync(&sdata->u.mgd.chswitch_timer);
|
|
|
|
sdata->u.mgd.timers_running = 0;
|
|
|
|
sdata->vif.bss_conf.dtim_period = 0;
|
|
|
|
ifmgd->flags = 0;
|
|
ieee80211_vif_release_channel(sdata);
|
|
}
|
|
|
|
void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_hdr *hdr)
|
|
{
|
|
/*
|
|
* We can postpone the mgd.timer whenever receiving unicast frames
|
|
* from AP because we know that the connection is working both ways
|
|
* at that time. But multicast frames (and hence also beacons) must
|
|
* be ignored here, because we need to trigger the timer during
|
|
* data idle periods for sending the periodic probe request to the
|
|
* AP we're connected to.
|
|
*/
|
|
if (is_multicast_ether_addr(hdr->addr1))
|
|
return;
|
|
|
|
ieee80211_sta_reset_conn_monitor(sdata);
|
|
}
|
|
|
|
static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
mutex_lock(&local->mtx);
|
|
if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
|
|
IEEE80211_STA_CONNECTION_POLL))) {
|
|
mutex_unlock(&local->mtx);
|
|
return;
|
|
}
|
|
|
|
__ieee80211_stop_poll(sdata);
|
|
|
|
mutex_lock(&local->iflist_mtx);
|
|
ieee80211_recalc_ps(local, -1);
|
|
mutex_unlock(&local->iflist_mtx);
|
|
|
|
if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
|
|
goto out;
|
|
|
|
/*
|
|
* We've received a probe response, but are not sure whether
|
|
* we have or will be receiving any beacons or data, so let's
|
|
* schedule the timers again, just in case.
|
|
*/
|
|
ieee80211_sta_reset_beacon_monitor(sdata);
|
|
|
|
mod_timer(&ifmgd->conn_mon_timer,
|
|
round_jiffies_up(jiffies +
|
|
IEEE80211_CONNECTION_IDLE_TIME));
|
|
out:
|
|
mutex_unlock(&local->mtx);
|
|
}
|
|
|
|
void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_hdr *hdr, bool ack)
|
|
{
|
|
if (!ieee80211_is_data(hdr->frame_control))
|
|
return;
|
|
|
|
if (ieee80211_is_nullfunc(hdr->frame_control) &&
|
|
sdata->u.mgd.probe_send_count > 0) {
|
|
if (ack)
|
|
ieee80211_sta_reset_conn_monitor(sdata);
|
|
else
|
|
sdata->u.mgd.nullfunc_failed = true;
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->work);
|
|
return;
|
|
}
|
|
|
|
if (ack)
|
|
ieee80211_sta_reset_conn_monitor(sdata);
|
|
}
|
|
|
|
static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
const u8 *ssid;
|
|
u8 *dst = ifmgd->associated->bssid;
|
|
u8 unicast_limit = max(1, max_probe_tries - 3);
|
|
|
|
/*
|
|
* Try sending broadcast probe requests for the last three
|
|
* probe requests after the first ones failed since some
|
|
* buggy APs only support broadcast probe requests.
|
|
*/
|
|
if (ifmgd->probe_send_count >= unicast_limit)
|
|
dst = NULL;
|
|
|
|
/*
|
|
* When the hardware reports an accurate Tx ACK status, it's
|
|
* better to send a nullfunc frame instead of a probe request,
|
|
* as it will kick us off the AP quickly if we aren't associated
|
|
* anymore. The timeout will be reset if the frame is ACKed by
|
|
* the AP.
|
|
*/
|
|
ifmgd->probe_send_count++;
|
|
|
|
if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
|
|
ifmgd->nullfunc_failed = false;
|
|
ieee80211_send_nullfunc(sdata->local, sdata, 0);
|
|
} else {
|
|
int ssid_len;
|
|
|
|
rcu_read_lock();
|
|
ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
|
|
if (WARN_ON_ONCE(ssid == NULL))
|
|
ssid_len = 0;
|
|
else
|
|
ssid_len = ssid[1];
|
|
|
|
ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
|
|
0, (u32) -1, true, 0,
|
|
ifmgd->associated->channel, false);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
|
|
run_again(ifmgd, ifmgd->probe_timeout);
|
|
if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
|
|
drv_flush(sdata->local, false);
|
|
}
|
|
|
|
static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
|
|
bool beacon)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
bool already = false;
|
|
|
|
if (!ieee80211_sdata_running(sdata))
|
|
return;
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
|
|
if (!ifmgd->associated)
|
|
goto out;
|
|
|
|
mutex_lock(&sdata->local->mtx);
|
|
|
|
if (sdata->local->tmp_channel || sdata->local->scanning) {
|
|
mutex_unlock(&sdata->local->mtx);
|
|
goto out;
|
|
}
|
|
|
|
if (beacon)
|
|
mlme_dbg_ratelimited(sdata,
|
|
"detected beacon loss from AP - probing\n");
|
|
|
|
ieee80211_cqm_rssi_notify(&sdata->vif,
|
|
NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
|
|
|
|
/*
|
|
* The driver/our work has already reported this event or the
|
|
* connection monitoring has kicked in and we have already sent
|
|
* a probe request. Or maybe the AP died and the driver keeps
|
|
* reporting until we disassociate...
|
|
*
|
|
* In either case we have to ignore the current call to this
|
|
* function (except for setting the correct probe reason bit)
|
|
* because otherwise we would reset the timer every time and
|
|
* never check whether we received a probe response!
|
|
*/
|
|
if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
|
|
IEEE80211_STA_CONNECTION_POLL))
|
|
already = true;
|
|
|
|
if (beacon)
|
|
ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
|
|
else
|
|
ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
|
|
|
|
mutex_unlock(&sdata->local->mtx);
|
|
|
|
if (already)
|
|
goto out;
|
|
|
|
mutex_lock(&sdata->local->iflist_mtx);
|
|
ieee80211_recalc_ps(sdata->local, -1);
|
|
mutex_unlock(&sdata->local->iflist_mtx);
|
|
|
|
ifmgd->probe_send_count = 0;
|
|
ieee80211_mgd_probe_ap_send(sdata);
|
|
out:
|
|
mutex_unlock(&ifmgd->mtx);
|
|
}
|
|
|
|
struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct cfg80211_bss *cbss;
|
|
struct sk_buff *skb;
|
|
const u8 *ssid;
|
|
int ssid_len;
|
|
|
|
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
|
|
return NULL;
|
|
|
|
ASSERT_MGD_MTX(ifmgd);
|
|
|
|
if (ifmgd->associated)
|
|
cbss = ifmgd->associated;
|
|
else if (ifmgd->auth_data)
|
|
cbss = ifmgd->auth_data->bss;
|
|
else if (ifmgd->assoc_data)
|
|
cbss = ifmgd->assoc_data->bss;
|
|
else
|
|
return NULL;
|
|
|
|
rcu_read_lock();
|
|
ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
|
|
if (WARN_ON_ONCE(ssid == NULL))
|
|
ssid_len = 0;
|
|
else
|
|
ssid_len = ssid[1];
|
|
|
|
skb = ieee80211_build_probe_req(sdata, cbss->bssid,
|
|
(u32) -1, cbss->channel,
|
|
ssid + 2, ssid_len,
|
|
NULL, 0, true);
|
|
rcu_read_unlock();
|
|
|
|
return skb;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_ap_probereq_get);
|
|
|
|
static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
if (!ifmgd->associated) {
|
|
mutex_unlock(&ifmgd->mtx);
|
|
return;
|
|
}
|
|
|
|
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
|
|
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
|
|
true, frame_buf);
|
|
ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
|
|
ieee80211_wake_queues_by_reason(&sdata->local->hw,
|
|
IEEE80211_QUEUE_STOP_REASON_CSA);
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
/*
|
|
* must be outside lock due to cfg80211,
|
|
* but that's not a problem.
|
|
*/
|
|
cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
|
|
}
|
|
|
|
static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
container_of(work, struct ieee80211_sub_if_data,
|
|
u.mgd.beacon_connection_loss_work);
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct sta_info *sta;
|
|
|
|
if (ifmgd->associated) {
|
|
rcu_read_lock();
|
|
sta = sta_info_get(sdata, ifmgd->bssid);
|
|
if (sta)
|
|
sta->beacon_loss_count++;
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
if (ifmgd->connection_loss) {
|
|
sdata_info(sdata, "Connection to AP %pM lost\n",
|
|
ifmgd->bssid);
|
|
__ieee80211_disconnect(sdata);
|
|
} else {
|
|
ieee80211_mgd_probe_ap(sdata, true);
|
|
}
|
|
}
|
|
|
|
static void ieee80211_csa_connection_drop_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
container_of(work, struct ieee80211_sub_if_data,
|
|
u.mgd.csa_connection_drop_work);
|
|
|
|
__ieee80211_disconnect(sdata);
|
|
}
|
|
|
|
void ieee80211_beacon_loss(struct ieee80211_vif *vif)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
struct ieee80211_hw *hw = &sdata->local->hw;
|
|
|
|
trace_api_beacon_loss(sdata);
|
|
|
|
WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
|
|
sdata->u.mgd.connection_loss = false;
|
|
ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_beacon_loss);
|
|
|
|
void ieee80211_connection_loss(struct ieee80211_vif *vif)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
struct ieee80211_hw *hw = &sdata->local->hw;
|
|
|
|
trace_api_connection_loss(sdata);
|
|
|
|
sdata->u.mgd.connection_loss = true;
|
|
ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_connection_loss);
|
|
|
|
|
|
static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
|
|
bool assoc)
|
|
{
|
|
struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
|
|
|
|
lockdep_assert_held(&sdata->u.mgd.mtx);
|
|
|
|
if (!assoc) {
|
|
sta_info_destroy_addr(sdata, auth_data->bss->bssid);
|
|
|
|
memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
|
|
sdata->u.mgd.flags = 0;
|
|
ieee80211_vif_release_channel(sdata);
|
|
}
|
|
|
|
cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
|
|
kfree(auth_data);
|
|
sdata->u.mgd.auth_data = NULL;
|
|
}
|
|
|
|
static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
|
|
u8 *pos;
|
|
struct ieee802_11_elems elems;
|
|
u32 tx_flags = 0;
|
|
|
|
pos = mgmt->u.auth.variable;
|
|
ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
|
|
if (!elems.challenge)
|
|
return;
|
|
auth_data->expected_transaction = 4;
|
|
drv_mgd_prepare_tx(sdata->local, sdata);
|
|
if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
|
|
tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
|
|
IEEE80211_TX_INTFL_MLME_CONN_TX;
|
|
ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
|
|
elems.challenge - 2, elems.challenge_len + 2,
|
|
auth_data->bss->bssid, auth_data->bss->bssid,
|
|
auth_data->key, auth_data->key_len,
|
|
auth_data->key_idx, tx_flags);
|
|
}
|
|
|
|
static enum rx_mgmt_action __must_check
|
|
ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
u8 bssid[ETH_ALEN];
|
|
u16 auth_alg, auth_transaction, status_code;
|
|
struct sta_info *sta;
|
|
|
|
lockdep_assert_held(&ifmgd->mtx);
|
|
|
|
if (len < 24 + 6)
|
|
return RX_MGMT_NONE;
|
|
|
|
if (!ifmgd->auth_data || ifmgd->auth_data->done)
|
|
return RX_MGMT_NONE;
|
|
|
|
memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
|
|
|
|
if (!ether_addr_equal(bssid, mgmt->bssid))
|
|
return RX_MGMT_NONE;
|
|
|
|
auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
|
|
auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
|
|
status_code = le16_to_cpu(mgmt->u.auth.status_code);
|
|
|
|
if (auth_alg != ifmgd->auth_data->algorithm ||
|
|
auth_transaction != ifmgd->auth_data->expected_transaction) {
|
|
sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
|
|
mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
|
|
auth_transaction,
|
|
ifmgd->auth_data->expected_transaction);
|
|
return RX_MGMT_NONE;
|
|
}
|
|
|
|
if (status_code != WLAN_STATUS_SUCCESS) {
|
|
sdata_info(sdata, "%pM denied authentication (status %d)\n",
|
|
mgmt->sa, status_code);
|
|
ieee80211_destroy_auth_data(sdata, false);
|
|
return RX_MGMT_CFG80211_RX_AUTH;
|
|
}
|
|
|
|
switch (ifmgd->auth_data->algorithm) {
|
|
case WLAN_AUTH_OPEN:
|
|
case WLAN_AUTH_LEAP:
|
|
case WLAN_AUTH_FT:
|
|
case WLAN_AUTH_SAE:
|
|
break;
|
|
case WLAN_AUTH_SHARED_KEY:
|
|
if (ifmgd->auth_data->expected_transaction != 4) {
|
|
ieee80211_auth_challenge(sdata, mgmt, len);
|
|
/* need another frame */
|
|
return RX_MGMT_NONE;
|
|
}
|
|
break;
|
|
default:
|
|
WARN_ONCE(1, "invalid auth alg %d",
|
|
ifmgd->auth_data->algorithm);
|
|
return RX_MGMT_NONE;
|
|
}
|
|
|
|
sdata_info(sdata, "authenticated\n");
|
|
ifmgd->auth_data->done = true;
|
|
ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
|
|
ifmgd->auth_data->timeout_started = true;
|
|
run_again(ifmgd, ifmgd->auth_data->timeout);
|
|
|
|
if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
|
|
ifmgd->auth_data->expected_transaction != 2) {
|
|
/*
|
|
* Report auth frame to user space for processing since another
|
|
* round of Authentication frames is still needed.
|
|
*/
|
|
return RX_MGMT_CFG80211_RX_AUTH;
|
|
}
|
|
|
|
/* move station state to auth */
|
|
mutex_lock(&sdata->local->sta_mtx);
|
|
sta = sta_info_get(sdata, bssid);
|
|
if (!sta) {
|
|
WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
|
|
goto out_err;
|
|
}
|
|
if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
|
|
sdata_info(sdata, "failed moving %pM to auth\n", bssid);
|
|
goto out_err;
|
|
}
|
|
mutex_unlock(&sdata->local->sta_mtx);
|
|
|
|
return RX_MGMT_CFG80211_RX_AUTH;
|
|
out_err:
|
|
mutex_unlock(&sdata->local->sta_mtx);
|
|
/* ignore frame -- wait for timeout */
|
|
return RX_MGMT_NONE;
|
|
}
|
|
|
|
|
|
static enum rx_mgmt_action __must_check
|
|
ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
const u8 *bssid = NULL;
|
|
u16 reason_code;
|
|
|
|
lockdep_assert_held(&ifmgd->mtx);
|
|
|
|
if (len < 24 + 2)
|
|
return RX_MGMT_NONE;
|
|
|
|
if (!ifmgd->associated ||
|
|
!ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
|
|
return RX_MGMT_NONE;
|
|
|
|
bssid = ifmgd->associated->bssid;
|
|
|
|
reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
|
|
|
|
sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
|
|
bssid, reason_code);
|
|
|
|
ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
|
|
|
|
return RX_MGMT_CFG80211_DEAUTH;
|
|
}
|
|
|
|
|
|
static enum rx_mgmt_action __must_check
|
|
ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
u16 reason_code;
|
|
|
|
lockdep_assert_held(&ifmgd->mtx);
|
|
|
|
if (len < 24 + 2)
|
|
return RX_MGMT_NONE;
|
|
|
|
if (!ifmgd->associated ||
|
|
!ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
|
|
return RX_MGMT_NONE;
|
|
|
|
reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
|
|
|
|
sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
|
|
mgmt->sa, reason_code);
|
|
|
|
ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
|
|
|
|
return RX_MGMT_CFG80211_DISASSOC;
|
|
}
|
|
|
|
static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
|
|
u8 *supp_rates, unsigned int supp_rates_len,
|
|
u32 *rates, u32 *basic_rates,
|
|
bool *have_higher_than_11mbit,
|
|
int *min_rate, int *min_rate_index)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < supp_rates_len; i++) {
|
|
int rate = (supp_rates[i] & 0x7f) * 5;
|
|
bool is_basic = !!(supp_rates[i] & 0x80);
|
|
|
|
if (rate > 110)
|
|
*have_higher_than_11mbit = true;
|
|
|
|
/*
|
|
* BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
|
|
* 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
|
|
*
|
|
* Note: Even through the membership selector and the basic
|
|
* rate flag share the same bit, they are not exactly
|
|
* the same.
|
|
*/
|
|
if (!!(supp_rates[i] & 0x80) &&
|
|
(supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
|
|
continue;
|
|
|
|
for (j = 0; j < sband->n_bitrates; j++) {
|
|
if (sband->bitrates[j].bitrate == rate) {
|
|
*rates |= BIT(j);
|
|
if (is_basic)
|
|
*basic_rates |= BIT(j);
|
|
if (rate < *min_rate) {
|
|
*min_rate = rate;
|
|
*min_rate_index = j;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
|
|
bool assoc)
|
|
{
|
|
struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
|
|
|
|
lockdep_assert_held(&sdata->u.mgd.mtx);
|
|
|
|
if (!assoc) {
|
|
sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
|
|
|
|
memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
|
|
sdata->u.mgd.flags = 0;
|
|
ieee80211_vif_release_channel(sdata);
|
|
}
|
|
|
|
kfree(assoc_data);
|
|
sdata->u.mgd.assoc_data = NULL;
|
|
}
|
|
|
|
static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_bss *cbss,
|
|
struct ieee80211_mgmt *mgmt, size_t len)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_supported_band *sband;
|
|
struct sta_info *sta;
|
|
u8 *pos;
|
|
u16 capab_info, aid;
|
|
struct ieee802_11_elems elems;
|
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
|
|
u32 changed = 0;
|
|
int err;
|
|
|
|
/* AssocResp and ReassocResp have identical structure */
|
|
|
|
aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
|
|
capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
|
|
|
|
if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
|
|
sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
|
|
aid);
|
|
aid &= ~(BIT(15) | BIT(14));
|
|
|
|
ifmgd->broken_ap = false;
|
|
|
|
if (aid == 0 || aid > IEEE80211_MAX_AID) {
|
|
sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
|
|
aid);
|
|
aid = 0;
|
|
ifmgd->broken_ap = true;
|
|
}
|
|
|
|
pos = mgmt->u.assoc_resp.variable;
|
|
ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
|
|
|
|
if (!elems.supp_rates) {
|
|
sdata_info(sdata, "no SuppRates element in AssocResp\n");
|
|
return false;
|
|
}
|
|
|
|
ifmgd->aid = aid;
|
|
|
|
/*
|
|
* We previously checked these in the beacon/probe response, so
|
|
* they should be present here. This is just a safety net.
|
|
*/
|
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
|
|
(!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
|
|
sdata_info(sdata,
|
|
"HT AP is missing WMM params or HT capability/operation in AssocResp\n");
|
|
return false;
|
|
}
|
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
|
|
(!elems.vht_cap_elem || !elems.vht_operation)) {
|
|
sdata_info(sdata,
|
|
"VHT AP is missing VHT capability/operation in AssocResp\n");
|
|
return false;
|
|
}
|
|
|
|
mutex_lock(&sdata->local->sta_mtx);
|
|
/*
|
|
* station info was already allocated and inserted before
|
|
* the association and should be available to us
|
|
*/
|
|
sta = sta_info_get(sdata, cbss->bssid);
|
|
if (WARN_ON(!sta)) {
|
|
mutex_unlock(&sdata->local->sta_mtx);
|
|
return false;
|
|
}
|
|
|
|
sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
|
|
|
|
/* Set up internal HT/VHT capabilities */
|
|
if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
|
|
ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
|
|
elems.ht_cap_elem, sta);
|
|
|
|
if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
|
|
ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
|
|
elems.vht_cap_elem, sta);
|
|
|
|
/*
|
|
* Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
|
|
* in their association response, so ignore that data for our own
|
|
* configuration. If it changed since the last beacon, we'll get the
|
|
* next beacon and update then.
|
|
*/
|
|
|
|
/*
|
|
* If an operating mode notification IE is present, override the
|
|
* NSS calculation (that would be done in rate_control_rate_init())
|
|
* and use the # of streams from that element.
|
|
*/
|
|
if (elems.opmode_notif &&
|
|
!(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
|
|
u8 nss;
|
|
|
|
nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
|
|
nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
|
|
nss += 1;
|
|
sta->sta.rx_nss = nss;
|
|
}
|
|
|
|
rate_control_rate_init(sta);
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
|
|
set_sta_flag(sta, WLAN_STA_MFP);
|
|
|
|
if (elems.wmm_param)
|
|
set_sta_flag(sta, WLAN_STA_WME);
|
|
|
|
err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
|
|
if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
|
|
err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
|
|
if (err) {
|
|
sdata_info(sdata,
|
|
"failed to move station %pM to desired state\n",
|
|
sta->sta.addr);
|
|
WARN_ON(__sta_info_destroy(sta));
|
|
mutex_unlock(&sdata->local->sta_mtx);
|
|
return false;
|
|
}
|
|
|
|
mutex_unlock(&sdata->local->sta_mtx);
|
|
|
|
/*
|
|
* Always handle WMM once after association regardless
|
|
* of the first value the AP uses. Setting -1 here has
|
|
* that effect because the AP values is an unsigned
|
|
* 4-bit value.
|
|
*/
|
|
ifmgd->wmm_last_param_set = -1;
|
|
|
|
if (elems.wmm_param)
|
|
ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
|
|
elems.wmm_param_len);
|
|
else
|
|
ieee80211_set_wmm_default(sdata, false);
|
|
changed |= BSS_CHANGED_QOS;
|
|
|
|
/* set AID and assoc capability,
|
|
* ieee80211_set_associated() will tell the driver */
|
|
bss_conf->aid = aid;
|
|
bss_conf->assoc_capability = capab_info;
|
|
ieee80211_set_associated(sdata, cbss, changed);
|
|
|
|
/*
|
|
* If we're using 4-addr mode, let the AP know that we're
|
|
* doing so, so that it can create the STA VLAN on its side
|
|
*/
|
|
if (ifmgd->use_4addr)
|
|
ieee80211_send_4addr_nullfunc(local, sdata);
|
|
|
|
/*
|
|
* Start timer to probe the connection to the AP now.
|
|
* Also start the timer that will detect beacon loss.
|
|
*/
|
|
ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
|
|
ieee80211_sta_reset_beacon_monitor(sdata);
|
|
|
|
return true;
|
|
}
|
|
|
|
static enum rx_mgmt_action __must_check
|
|
ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len,
|
|
struct cfg80211_bss **bss)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
|
|
u16 capab_info, status_code, aid;
|
|
struct ieee802_11_elems elems;
|
|
u8 *pos;
|
|
bool reassoc;
|
|
|
|
lockdep_assert_held(&ifmgd->mtx);
|
|
|
|
if (!assoc_data)
|
|
return RX_MGMT_NONE;
|
|
if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
|
|
return RX_MGMT_NONE;
|
|
|
|
/*
|
|
* AssocResp and ReassocResp have identical structure, so process both
|
|
* of them in this function.
|
|
*/
|
|
|
|
if (len < 24 + 6)
|
|
return RX_MGMT_NONE;
|
|
|
|
reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
|
|
capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
|
|
status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
|
|
aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
|
|
|
|
sdata_info(sdata,
|
|
"RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
|
|
reassoc ? "Rea" : "A", mgmt->sa,
|
|
capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
|
|
|
|
pos = mgmt->u.assoc_resp.variable;
|
|
ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
|
|
|
|
if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
|
|
elems.timeout_int && elems.timeout_int_len == 5 &&
|
|
elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
|
|
u32 tu, ms;
|
|
tu = get_unaligned_le32(elems.timeout_int + 1);
|
|
ms = tu * 1024 / 1000;
|
|
sdata_info(sdata,
|
|
"%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
|
|
mgmt->sa, tu, ms);
|
|
assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
|
|
assoc_data->timeout_started = true;
|
|
if (ms > IEEE80211_ASSOC_TIMEOUT)
|
|
run_again(ifmgd, assoc_data->timeout);
|
|
return RX_MGMT_NONE;
|
|
}
|
|
|
|
*bss = assoc_data->bss;
|
|
|
|
if (status_code != WLAN_STATUS_SUCCESS) {
|
|
sdata_info(sdata, "%pM denied association (code=%d)\n",
|
|
mgmt->sa, status_code);
|
|
ieee80211_destroy_assoc_data(sdata, false);
|
|
} else {
|
|
if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
|
|
/* oops -- internal error -- send timeout for now */
|
|
ieee80211_destroy_assoc_data(sdata, false);
|
|
cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
|
|
return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
|
|
}
|
|
sdata_info(sdata, "associated\n");
|
|
|
|
/*
|
|
* destroy assoc_data afterwards, as otherwise an idle
|
|
* recalc after assoc_data is NULL but before associated
|
|
* is set can cause the interface to go idle
|
|
*/
|
|
ieee80211_destroy_assoc_data(sdata, true);
|
|
}
|
|
|
|
return RX_MGMT_CFG80211_RX_ASSOC;
|
|
}
|
|
|
|
static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len,
|
|
struct ieee80211_rx_status *rx_status,
|
|
struct ieee802_11_elems *elems)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
int freq;
|
|
struct ieee80211_bss *bss;
|
|
struct ieee80211_channel *channel;
|
|
bool need_ps = false;
|
|
|
|
if ((sdata->u.mgd.associated &&
|
|
ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
|
|
(sdata->u.mgd.assoc_data &&
|
|
ether_addr_equal(mgmt->bssid,
|
|
sdata->u.mgd.assoc_data->bss->bssid))) {
|
|
/* not previously set so we may need to recalc */
|
|
need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
|
|
|
|
if (elems->tim && !elems->parse_error) {
|
|
const struct ieee80211_tim_ie *tim_ie = elems->tim;
|
|
sdata->u.mgd.dtim_period = tim_ie->dtim_period;
|
|
}
|
|
}
|
|
|
|
if (elems->ds_params && elems->ds_params_len == 1)
|
|
freq = ieee80211_channel_to_frequency(elems->ds_params[0],
|
|
rx_status->band);
|
|
else
|
|
freq = rx_status->freq;
|
|
|
|
channel = ieee80211_get_channel(local->hw.wiphy, freq);
|
|
|
|
if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
|
|
return;
|
|
|
|
bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
|
|
channel);
|
|
if (bss)
|
|
ieee80211_rx_bss_put(local, bss);
|
|
|
|
if (!sdata->u.mgd.associated)
|
|
return;
|
|
|
|
if (need_ps) {
|
|
mutex_lock(&local->iflist_mtx);
|
|
ieee80211_recalc_ps(local, -1);
|
|
mutex_unlock(&local->iflist_mtx);
|
|
}
|
|
|
|
if (elems->ch_switch_ie &&
|
|
memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
|
|
ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
|
|
bss, rx_status->mactime);
|
|
}
|
|
|
|
|
|
static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_mgmt *mgmt = (void *)skb->data;
|
|
struct ieee80211_if_managed *ifmgd;
|
|
struct ieee80211_rx_status *rx_status = (void *) skb->cb;
|
|
size_t baselen, len = skb->len;
|
|
struct ieee802_11_elems elems;
|
|
|
|
ifmgd = &sdata->u.mgd;
|
|
|
|
ASSERT_MGD_MTX(ifmgd);
|
|
|
|
if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
|
|
return; /* ignore ProbeResp to foreign address */
|
|
|
|
baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
|
|
if (baselen > len)
|
|
return;
|
|
|
|
ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
|
|
&elems);
|
|
|
|
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
|
|
|
|
if (ifmgd->associated &&
|
|
ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
|
|
ieee80211_reset_ap_probe(sdata);
|
|
|
|
if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
|
|
ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
|
|
/* got probe response, continue with auth */
|
|
sdata_info(sdata, "direct probe responded\n");
|
|
ifmgd->auth_data->tries = 0;
|
|
ifmgd->auth_data->timeout = jiffies;
|
|
ifmgd->auth_data->timeout_started = true;
|
|
run_again(ifmgd, ifmgd->auth_data->timeout);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This is the canonical list of information elements we care about,
|
|
* the filter code also gives us all changes to the Microsoft OUI
|
|
* (00:50:F2) vendor IE which is used for WMM which we need to track.
|
|
*
|
|
* We implement beacon filtering in software since that means we can
|
|
* avoid processing the frame here and in cfg80211, and userspace
|
|
* will not be able to tell whether the hardware supports it or not.
|
|
*
|
|
* XXX: This list needs to be dynamic -- userspace needs to be able to
|
|
* add items it requires. It also needs to be able to tell us to
|
|
* look out for other vendor IEs.
|
|
*/
|
|
static const u64 care_about_ies =
|
|
(1ULL << WLAN_EID_COUNTRY) |
|
|
(1ULL << WLAN_EID_ERP_INFO) |
|
|
(1ULL << WLAN_EID_CHANNEL_SWITCH) |
|
|
(1ULL << WLAN_EID_PWR_CONSTRAINT) |
|
|
(1ULL << WLAN_EID_HT_CAPABILITY) |
|
|
(1ULL << WLAN_EID_HT_OPERATION);
|
|
|
|
static enum rx_mgmt_action
|
|
ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len,
|
|
u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
|
|
size_t baselen;
|
|
struct ieee802_11_elems elems;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_chanctx_conf *chanctx_conf;
|
|
struct ieee80211_channel *chan;
|
|
struct sta_info *sta;
|
|
u32 changed = 0;
|
|
bool erp_valid;
|
|
u8 erp_value = 0;
|
|
u32 ncrc;
|
|
u8 *bssid;
|
|
|
|
lockdep_assert_held(&ifmgd->mtx);
|
|
|
|
/* Process beacon from the current BSS */
|
|
baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
|
|
if (baselen > len)
|
|
return RX_MGMT_NONE;
|
|
|
|
rcu_read_lock();
|
|
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
|
|
if (!chanctx_conf) {
|
|
rcu_read_unlock();
|
|
return RX_MGMT_NONE;
|
|
}
|
|
|
|
if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
|
|
rcu_read_unlock();
|
|
return RX_MGMT_NONE;
|
|
}
|
|
chan = chanctx_conf->def.chan;
|
|
rcu_read_unlock();
|
|
|
|
if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
|
|
ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
|
|
ieee802_11_parse_elems(mgmt->u.beacon.variable,
|
|
len - baselen, &elems);
|
|
|
|
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
|
|
ifmgd->assoc_data->have_beacon = true;
|
|
ifmgd->assoc_data->need_beacon = false;
|
|
if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
|
|
sdata->vif.bss_conf.sync_tsf =
|
|
le64_to_cpu(mgmt->u.beacon.timestamp);
|
|
sdata->vif.bss_conf.sync_device_ts =
|
|
rx_status->device_timestamp;
|
|
if (elems.tim)
|
|
sdata->vif.bss_conf.sync_dtim_count =
|
|
elems.tim->dtim_count;
|
|
else
|
|
sdata->vif.bss_conf.sync_dtim_count = 0;
|
|
}
|
|
/* continue assoc process */
|
|
ifmgd->assoc_data->timeout = jiffies;
|
|
ifmgd->assoc_data->timeout_started = true;
|
|
run_again(ifmgd, ifmgd->assoc_data->timeout);
|
|
return RX_MGMT_NONE;
|
|
}
|
|
|
|
if (!ifmgd->associated ||
|
|
!ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
|
|
return RX_MGMT_NONE;
|
|
bssid = ifmgd->associated->bssid;
|
|
|
|
/* Track average RSSI from the Beacon frames of the current AP */
|
|
ifmgd->last_beacon_signal = rx_status->signal;
|
|
if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
|
|
ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
|
|
ifmgd->ave_beacon_signal = rx_status->signal * 16;
|
|
ifmgd->last_cqm_event_signal = 0;
|
|
ifmgd->count_beacon_signal = 1;
|
|
ifmgd->last_ave_beacon_signal = 0;
|
|
} else {
|
|
ifmgd->ave_beacon_signal =
|
|
(IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
|
|
(16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
|
|
ifmgd->ave_beacon_signal) / 16;
|
|
ifmgd->count_beacon_signal++;
|
|
}
|
|
|
|
if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
|
|
ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
|
|
int sig = ifmgd->ave_beacon_signal;
|
|
int last_sig = ifmgd->last_ave_beacon_signal;
|
|
|
|
/*
|
|
* if signal crosses either of the boundaries, invoke callback
|
|
* with appropriate parameters
|
|
*/
|
|
if (sig > ifmgd->rssi_max_thold &&
|
|
(last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
|
|
ifmgd->last_ave_beacon_signal = sig;
|
|
drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
|
|
} else if (sig < ifmgd->rssi_min_thold &&
|
|
(last_sig >= ifmgd->rssi_max_thold ||
|
|
last_sig == 0)) {
|
|
ifmgd->last_ave_beacon_signal = sig;
|
|
drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
|
|
}
|
|
}
|
|
|
|
if (bss_conf->cqm_rssi_thold &&
|
|
ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
|
|
!(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
|
|
int sig = ifmgd->ave_beacon_signal / 16;
|
|
int last_event = ifmgd->last_cqm_event_signal;
|
|
int thold = bss_conf->cqm_rssi_thold;
|
|
int hyst = bss_conf->cqm_rssi_hyst;
|
|
if (sig < thold &&
|
|
(last_event == 0 || sig < last_event - hyst)) {
|
|
ifmgd->last_cqm_event_signal = sig;
|
|
ieee80211_cqm_rssi_notify(
|
|
&sdata->vif,
|
|
NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
|
|
GFP_KERNEL);
|
|
} else if (sig > thold &&
|
|
(last_event == 0 || sig > last_event + hyst)) {
|
|
ifmgd->last_cqm_event_signal = sig;
|
|
ieee80211_cqm_rssi_notify(
|
|
&sdata->vif,
|
|
NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
|
|
GFP_KERNEL);
|
|
}
|
|
}
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
|
|
mlme_dbg_ratelimited(sdata,
|
|
"cancelling AP probe due to a received beacon\n");
|
|
mutex_lock(&local->mtx);
|
|
ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
|
|
ieee80211_run_deferred_scan(local);
|
|
mutex_unlock(&local->mtx);
|
|
|
|
mutex_lock(&local->iflist_mtx);
|
|
ieee80211_recalc_ps(local, -1);
|
|
mutex_unlock(&local->iflist_mtx);
|
|
}
|
|
|
|
/*
|
|
* Push the beacon loss detection into the future since
|
|
* we are processing a beacon from the AP just now.
|
|
*/
|
|
ieee80211_sta_reset_beacon_monitor(sdata);
|
|
|
|
ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
|
|
ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
|
|
len - baselen, &elems,
|
|
care_about_ies, ncrc);
|
|
|
|
if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
|
|
bool directed_tim = ieee80211_check_tim(elems.tim,
|
|
elems.tim_len,
|
|
ifmgd->aid);
|
|
if (directed_tim) {
|
|
if (local->hw.conf.dynamic_ps_timeout > 0) {
|
|
if (local->hw.conf.flags & IEEE80211_CONF_PS) {
|
|
local->hw.conf.flags &= ~IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local,
|
|
IEEE80211_CONF_CHANGE_PS);
|
|
}
|
|
ieee80211_send_nullfunc(local, sdata, 0);
|
|
} else if (!local->pspolling && sdata->u.mgd.powersave) {
|
|
local->pspolling = true;
|
|
|
|
/*
|
|
* Here is assumed that the driver will be
|
|
* able to send ps-poll frame and receive a
|
|
* response even though power save mode is
|
|
* enabled, but some drivers might require
|
|
* to disable power save here. This needs
|
|
* to be investigated.
|
|
*/
|
|
ieee80211_send_pspoll(local, sdata);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (sdata->vif.p2p) {
|
|
u8 noa[2];
|
|
int ret;
|
|
|
|
ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
|
|
len - baselen,
|
|
IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
|
|
noa, sizeof(noa));
|
|
if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
|
|
bss_conf->p2p_oppps = noa[1] & 0x80;
|
|
bss_conf->p2p_ctwindow = noa[1] & 0x7f;
|
|
changed |= BSS_CHANGED_P2P_PS;
|
|
sdata->u.mgd.p2p_noa_index = noa[0];
|
|
/*
|
|
* make sure we update all information, the CRC
|
|
* mechanism doesn't look at P2P attributes.
|
|
*/
|
|
ifmgd->beacon_crc_valid = false;
|
|
}
|
|
}
|
|
|
|
if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
|
|
return RX_MGMT_NONE;
|
|
ifmgd->beacon_crc = ncrc;
|
|
ifmgd->beacon_crc_valid = true;
|
|
|
|
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
|
|
|
|
if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
|
|
elems.wmm_param_len))
|
|
changed |= BSS_CHANGED_QOS;
|
|
|
|
/*
|
|
* If we haven't had a beacon before, tell the driver about the
|
|
* DTIM period (and beacon timing if desired) now.
|
|
*/
|
|
if (!bss_conf->dtim_period) {
|
|
/* a few bogus AP send dtim_period = 0 or no TIM IE */
|
|
if (elems.tim)
|
|
bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
|
|
else
|
|
bss_conf->dtim_period = 1;
|
|
|
|
if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
|
|
sdata->vif.bss_conf.sync_tsf =
|
|
le64_to_cpu(mgmt->u.beacon.timestamp);
|
|
sdata->vif.bss_conf.sync_device_ts =
|
|
rx_status->device_timestamp;
|
|
if (elems.tim)
|
|
sdata->vif.bss_conf.sync_dtim_count =
|
|
elems.tim->dtim_count;
|
|
else
|
|
sdata->vif.bss_conf.sync_dtim_count = 0;
|
|
}
|
|
|
|
changed |= BSS_CHANGED_DTIM_PERIOD;
|
|
}
|
|
|
|
if (elems.erp_info && elems.erp_info_len >= 1) {
|
|
erp_valid = true;
|
|
erp_value = elems.erp_info[0];
|
|
} else {
|
|
erp_valid = false;
|
|
}
|
|
changed |= ieee80211_handle_bss_capability(sdata,
|
|
le16_to_cpu(mgmt->u.beacon.capab_info),
|
|
erp_valid, erp_value);
|
|
|
|
mutex_lock(&local->sta_mtx);
|
|
sta = sta_info_get(sdata, bssid);
|
|
|
|
if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
|
|
elems.vht_operation, bssid, &changed)) {
|
|
mutex_unlock(&local->sta_mtx);
|
|
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
|
|
WLAN_REASON_DEAUTH_LEAVING,
|
|
true, deauth_buf);
|
|
return RX_MGMT_CFG80211_TX_DEAUTH;
|
|
}
|
|
|
|
if (sta && elems.opmode_notif)
|
|
ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
|
|
rx_status->band, true);
|
|
mutex_unlock(&local->sta_mtx);
|
|
|
|
if (elems.country_elem && elems.pwr_constr_elem &&
|
|
mgmt->u.probe_resp.capab_info &
|
|
cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
|
|
changed |= ieee80211_handle_pwr_constr(sdata, chan,
|
|
elems.country_elem,
|
|
elems.country_elem_len,
|
|
elems.pwr_constr_elem);
|
|
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
|
|
return RX_MGMT_NONE;
|
|
}
|
|
|
|
void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_rx_status *rx_status;
|
|
struct ieee80211_mgmt *mgmt;
|
|
struct cfg80211_bss *bss = NULL;
|
|
enum rx_mgmt_action rma = RX_MGMT_NONE;
|
|
u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
|
|
u16 fc;
|
|
|
|
rx_status = (struct ieee80211_rx_status *) skb->cb;
|
|
mgmt = (struct ieee80211_mgmt *) skb->data;
|
|
fc = le16_to_cpu(mgmt->frame_control);
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
|
|
switch (fc & IEEE80211_FCTL_STYPE) {
|
|
case IEEE80211_STYPE_BEACON:
|
|
rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
|
|
deauth_buf, rx_status);
|
|
break;
|
|
case IEEE80211_STYPE_PROBE_RESP:
|
|
ieee80211_rx_mgmt_probe_resp(sdata, skb);
|
|
break;
|
|
case IEEE80211_STYPE_AUTH:
|
|
rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
|
|
break;
|
|
case IEEE80211_STYPE_DEAUTH:
|
|
rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
|
|
break;
|
|
case IEEE80211_STYPE_DISASSOC:
|
|
rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
|
|
break;
|
|
case IEEE80211_STYPE_ASSOC_RESP:
|
|
case IEEE80211_STYPE_REASSOC_RESP:
|
|
rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
|
|
break;
|
|
case IEEE80211_STYPE_ACTION:
|
|
switch (mgmt->u.action.category) {
|
|
case WLAN_CATEGORY_SPECTRUM_MGMT:
|
|
ieee80211_sta_process_chanswitch(sdata,
|
|
&mgmt->u.action.u.chan_switch.sw_elem,
|
|
(void *)ifmgd->associated->priv,
|
|
rx_status->mactime);
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
switch (rma) {
|
|
case RX_MGMT_NONE:
|
|
/* no action */
|
|
break;
|
|
case RX_MGMT_CFG80211_DEAUTH:
|
|
cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
|
|
break;
|
|
case RX_MGMT_CFG80211_DISASSOC:
|
|
cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
|
|
break;
|
|
case RX_MGMT_CFG80211_RX_AUTH:
|
|
cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
|
|
break;
|
|
case RX_MGMT_CFG80211_RX_ASSOC:
|
|
cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
|
|
break;
|
|
case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
|
|
cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
|
|
break;
|
|
case RX_MGMT_CFG80211_TX_DEAUTH:
|
|
cfg80211_send_deauth(sdata->dev, deauth_buf,
|
|
sizeof(deauth_buf));
|
|
break;
|
|
default:
|
|
WARN(1, "unexpected: %d", rma);
|
|
}
|
|
}
|
|
|
|
static void ieee80211_sta_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
(struct ieee80211_sub_if_data *) data;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
if (local->quiescing) {
|
|
set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
|
|
return;
|
|
}
|
|
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
}
|
|
|
|
static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
|
|
u8 *bssid, u8 reason, bool tx)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
|
|
|
|
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
|
|
tx, frame_buf);
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
/*
|
|
* must be outside lock due to cfg80211,
|
|
* but that's not a problem.
|
|
*/
|
|
cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
}
|
|
|
|
static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
|
|
u32 tx_flags = 0;
|
|
|
|
lockdep_assert_held(&ifmgd->mtx);
|
|
|
|
if (WARN_ON_ONCE(!auth_data))
|
|
return -EINVAL;
|
|
|
|
if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
|
|
tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
|
|
IEEE80211_TX_INTFL_MLME_CONN_TX;
|
|
|
|
auth_data->tries++;
|
|
|
|
if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
|
|
sdata_info(sdata, "authentication with %pM timed out\n",
|
|
auth_data->bss->bssid);
|
|
|
|
/*
|
|
* Most likely AP is not in the range so remove the
|
|
* bss struct for that AP.
|
|
*/
|
|
cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
|
|
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
drv_mgd_prepare_tx(local, sdata);
|
|
|
|
if (auth_data->bss->proberesp_ies) {
|
|
u16 trans = 1;
|
|
u16 status = 0;
|
|
|
|
sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
|
|
auth_data->bss->bssid, auth_data->tries,
|
|
IEEE80211_AUTH_MAX_TRIES);
|
|
|
|
auth_data->expected_transaction = 2;
|
|
|
|
if (auth_data->algorithm == WLAN_AUTH_SAE) {
|
|
trans = auth_data->sae_trans;
|
|
status = auth_data->sae_status;
|
|
auth_data->expected_transaction = trans;
|
|
}
|
|
|
|
ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
|
|
auth_data->data, auth_data->data_len,
|
|
auth_data->bss->bssid,
|
|
auth_data->bss->bssid, NULL, 0, 0,
|
|
tx_flags);
|
|
} else {
|
|
const u8 *ssidie;
|
|
|
|
sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
|
|
auth_data->bss->bssid, auth_data->tries,
|
|
IEEE80211_AUTH_MAX_TRIES);
|
|
|
|
rcu_read_lock();
|
|
ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
|
|
if (!ssidie) {
|
|
rcu_read_unlock();
|
|
return -EINVAL;
|
|
}
|
|
/*
|
|
* Direct probe is sent to broadcast address as some APs
|
|
* will not answer to direct packet in unassociated state.
|
|
*/
|
|
ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
|
|
NULL, 0, (u32) -1, true, tx_flags,
|
|
auth_data->bss->channel, false);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
|
|
auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
|
|
ifmgd->auth_data->timeout_started = true;
|
|
run_again(ifmgd, auth_data->timeout);
|
|
} else {
|
|
auth_data->timeout_started = false;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
lockdep_assert_held(&sdata->u.mgd.mtx);
|
|
|
|
assoc_data->tries++;
|
|
if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
|
|
sdata_info(sdata, "association with %pM timed out\n",
|
|
assoc_data->bss->bssid);
|
|
|
|
/*
|
|
* Most likely AP is not in the range so remove the
|
|
* bss struct for that AP.
|
|
*/
|
|
cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
|
|
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
sdata_info(sdata, "associate with %pM (try %d/%d)\n",
|
|
assoc_data->bss->bssid, assoc_data->tries,
|
|
IEEE80211_ASSOC_MAX_TRIES);
|
|
ieee80211_send_assoc(sdata);
|
|
|
|
if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
|
|
assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
|
|
assoc_data->timeout_started = true;
|
|
run_again(&sdata->u.mgd, assoc_data->timeout);
|
|
} else {
|
|
assoc_data->timeout_started = false;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
|
|
__le16 fc, bool acked)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
sdata->u.mgd.status_fc = fc;
|
|
sdata->u.mgd.status_acked = acked;
|
|
sdata->u.mgd.status_received = true;
|
|
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
}
|
|
|
|
void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
|
|
if (ifmgd->status_received) {
|
|
__le16 fc = ifmgd->status_fc;
|
|
bool status_acked = ifmgd->status_acked;
|
|
|
|
ifmgd->status_received = false;
|
|
if (ifmgd->auth_data &&
|
|
(ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
|
|
if (status_acked) {
|
|
ifmgd->auth_data->timeout =
|
|
jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
|
|
run_again(ifmgd, ifmgd->auth_data->timeout);
|
|
} else {
|
|
ifmgd->auth_data->timeout = jiffies - 1;
|
|
}
|
|
ifmgd->auth_data->timeout_started = true;
|
|
} else if (ifmgd->assoc_data &&
|
|
(ieee80211_is_assoc_req(fc) ||
|
|
ieee80211_is_reassoc_req(fc))) {
|
|
if (status_acked) {
|
|
ifmgd->assoc_data->timeout =
|
|
jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
|
|
run_again(ifmgd, ifmgd->assoc_data->timeout);
|
|
} else {
|
|
ifmgd->assoc_data->timeout = jiffies - 1;
|
|
}
|
|
ifmgd->assoc_data->timeout_started = true;
|
|
}
|
|
}
|
|
|
|
if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
|
|
time_after(jiffies, ifmgd->auth_data->timeout)) {
|
|
if (ifmgd->auth_data->done) {
|
|
/*
|
|
* ok ... we waited for assoc but userspace didn't,
|
|
* so let's just kill the auth data
|
|
*/
|
|
ieee80211_destroy_auth_data(sdata, false);
|
|
} else if (ieee80211_probe_auth(sdata)) {
|
|
u8 bssid[ETH_ALEN];
|
|
|
|
memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
|
|
|
|
ieee80211_destroy_auth_data(sdata, false);
|
|
|
|
mutex_unlock(&ifmgd->mtx);
|
|
cfg80211_send_auth_timeout(sdata->dev, bssid);
|
|
mutex_lock(&ifmgd->mtx);
|
|
}
|
|
} else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
|
|
run_again(ifmgd, ifmgd->auth_data->timeout);
|
|
|
|
if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
|
|
time_after(jiffies, ifmgd->assoc_data->timeout)) {
|
|
if ((ifmgd->assoc_data->need_beacon &&
|
|
!ifmgd->assoc_data->have_beacon) ||
|
|
ieee80211_do_assoc(sdata)) {
|
|
u8 bssid[ETH_ALEN];
|
|
|
|
memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
|
|
|
|
ieee80211_destroy_assoc_data(sdata, false);
|
|
|
|
mutex_unlock(&ifmgd->mtx);
|
|
cfg80211_send_assoc_timeout(sdata->dev, bssid);
|
|
mutex_lock(&ifmgd->mtx);
|
|
}
|
|
} else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
|
|
run_again(ifmgd, ifmgd->assoc_data->timeout);
|
|
|
|
if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
|
|
IEEE80211_STA_CONNECTION_POLL) &&
|
|
ifmgd->associated) {
|
|
u8 bssid[ETH_ALEN];
|
|
int max_tries;
|
|
|
|
memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
|
|
|
|
if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
|
|
max_tries = max_nullfunc_tries;
|
|
else
|
|
max_tries = max_probe_tries;
|
|
|
|
/* ACK received for nullfunc probing frame */
|
|
if (!ifmgd->probe_send_count)
|
|
ieee80211_reset_ap_probe(sdata);
|
|
else if (ifmgd->nullfunc_failed) {
|
|
if (ifmgd->probe_send_count < max_tries) {
|
|
mlme_dbg(sdata,
|
|
"No ack for nullfunc frame to AP %pM, try %d/%i\n",
|
|
bssid, ifmgd->probe_send_count,
|
|
max_tries);
|
|
ieee80211_mgd_probe_ap_send(sdata);
|
|
} else {
|
|
mlme_dbg(sdata,
|
|
"No ack for nullfunc frame to AP %pM, disconnecting.\n",
|
|
bssid);
|
|
ieee80211_sta_connection_lost(sdata, bssid,
|
|
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
|
|
false);
|
|
}
|
|
} else if (time_is_after_jiffies(ifmgd->probe_timeout))
|
|
run_again(ifmgd, ifmgd->probe_timeout);
|
|
else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
|
|
mlme_dbg(sdata,
|
|
"Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
|
|
bssid, probe_wait_ms);
|
|
ieee80211_sta_connection_lost(sdata, bssid,
|
|
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
|
|
} else if (ifmgd->probe_send_count < max_tries) {
|
|
mlme_dbg(sdata,
|
|
"No probe response from AP %pM after %dms, try %d/%i\n",
|
|
bssid, probe_wait_ms,
|
|
ifmgd->probe_send_count, max_tries);
|
|
ieee80211_mgd_probe_ap_send(sdata);
|
|
} else {
|
|
/*
|
|
* We actually lost the connection ... or did we?
|
|
* Let's make sure!
|
|
*/
|
|
wiphy_debug(local->hw.wiphy,
|
|
"%s: No probe response from AP %pM"
|
|
" after %dms, disconnecting.\n",
|
|
sdata->name,
|
|
bssid, probe_wait_ms);
|
|
|
|
ieee80211_sta_connection_lost(sdata, bssid,
|
|
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&ifmgd->mtx);
|
|
}
|
|
|
|
static void ieee80211_sta_bcn_mon_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
(struct ieee80211_sub_if_data *) data;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
if (local->quiescing)
|
|
return;
|
|
|
|
sdata->u.mgd.connection_loss = false;
|
|
ieee80211_queue_work(&sdata->local->hw,
|
|
&sdata->u.mgd.beacon_connection_loss_work);
|
|
}
|
|
|
|
static void ieee80211_sta_conn_mon_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
(struct ieee80211_sub_if_data *) data;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
if (local->quiescing)
|
|
return;
|
|
|
|
ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
|
|
}
|
|
|
|
static void ieee80211_sta_monitor_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
container_of(work, struct ieee80211_sub_if_data,
|
|
u.mgd.monitor_work);
|
|
|
|
ieee80211_mgd_probe_ap(sdata, false);
|
|
}
|
|
|
|
static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
u32 flags;
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
|
|
__ieee80211_stop_poll(sdata);
|
|
|
|
/* let's probe the connection once */
|
|
flags = sdata->local->hw.flags;
|
|
if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
|
|
ieee80211_queue_work(&sdata->local->hw,
|
|
&sdata->u.mgd.monitor_work);
|
|
/* and do all the other regular work too */
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->work);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
/*
|
|
* Stop timers before deleting work items, as timers
|
|
* could race and re-add the work-items. They will be
|
|
* re-established on connection.
|
|
*/
|
|
del_timer_sync(&ifmgd->conn_mon_timer);
|
|
del_timer_sync(&ifmgd->bcn_mon_timer);
|
|
|
|
/*
|
|
* we need to use atomic bitops for the running bits
|
|
* only because both timers might fire at the same
|
|
* time -- the code here is properly synchronised.
|
|
*/
|
|
|
|
cancel_work_sync(&ifmgd->request_smps_work);
|
|
|
|
cancel_work_sync(&ifmgd->monitor_work);
|
|
cancel_work_sync(&ifmgd->beacon_connection_loss_work);
|
|
cancel_work_sync(&ifmgd->csa_connection_drop_work);
|
|
if (del_timer_sync(&ifmgd->timer))
|
|
set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
|
|
|
|
if (del_timer_sync(&ifmgd->chswitch_timer))
|
|
set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
|
|
cancel_work_sync(&ifmgd->chswitch_work);
|
|
}
|
|
|
|
void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
if (!ifmgd->associated) {
|
|
mutex_unlock(&ifmgd->mtx);
|
|
return;
|
|
}
|
|
|
|
if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
|
|
sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
|
|
mlme_dbg(sdata, "driver requested disconnect after resume\n");
|
|
ieee80211_sta_connection_lost(sdata,
|
|
ifmgd->associated->bssid,
|
|
WLAN_REASON_UNSPECIFIED,
|
|
true);
|
|
mutex_unlock(&ifmgd->mtx);
|
|
return;
|
|
}
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
|
|
add_timer(&ifmgd->timer);
|
|
if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
|
|
add_timer(&ifmgd->chswitch_timer);
|
|
ieee80211_sta_reset_beacon_monitor(sdata);
|
|
|
|
mutex_lock(&sdata->local->mtx);
|
|
ieee80211_restart_sta_timer(sdata);
|
|
mutex_unlock(&sdata->local->mtx);
|
|
}
|
|
#endif
|
|
|
|
/* interface setup */
|
|
void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd;
|
|
|
|
ifmgd = &sdata->u.mgd;
|
|
INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
|
|
INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
|
|
INIT_WORK(&ifmgd->beacon_connection_loss_work,
|
|
ieee80211_beacon_connection_loss_work);
|
|
INIT_WORK(&ifmgd->csa_connection_drop_work,
|
|
ieee80211_csa_connection_drop_work);
|
|
INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
|
|
setup_timer(&ifmgd->timer, ieee80211_sta_timer,
|
|
(unsigned long) sdata);
|
|
setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
|
|
(unsigned long) sdata);
|
|
setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
|
|
(unsigned long) sdata);
|
|
setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
|
|
(unsigned long) sdata);
|
|
|
|
ifmgd->flags = 0;
|
|
ifmgd->powersave = sdata->wdev.ps;
|
|
ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
|
|
ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
|
|
|
|
mutex_init(&ifmgd->mtx);
|
|
|
|
if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
|
|
ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
|
|
else
|
|
ifmgd->req_smps = IEEE80211_SMPS_OFF;
|
|
}
|
|
|
|
/* scan finished notification */
|
|
void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
|
|
/* Restart STA timers */
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list)
|
|
ieee80211_restart_sta_timer(sdata);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
int ieee80211_max_network_latency(struct notifier_block *nb,
|
|
unsigned long data, void *dummy)
|
|
{
|
|
s32 latency_usec = (s32) data;
|
|
struct ieee80211_local *local =
|
|
container_of(nb, struct ieee80211_local,
|
|
network_latency_notifier);
|
|
|
|
mutex_lock(&local->iflist_mtx);
|
|
ieee80211_recalc_ps(local, latency_usec);
|
|
mutex_unlock(&local->iflist_mtx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_bss *cbss)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
const u8 *ht_cap_ie, *vht_cap_ie;
|
|
const struct ieee80211_ht_cap *ht_cap;
|
|
const struct ieee80211_vht_cap *vht_cap;
|
|
u8 chains = 1;
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
|
|
return chains;
|
|
|
|
ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
|
|
if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
|
|
ht_cap = (void *)(ht_cap_ie + 2);
|
|
chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
|
|
/*
|
|
* TODO: use "Tx Maximum Number Spatial Streams Supported" and
|
|
* "Tx Unequal Modulation Supported" fields.
|
|
*/
|
|
}
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
|
|
return chains;
|
|
|
|
vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
|
|
if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
|
|
u8 nss;
|
|
u16 tx_mcs_map;
|
|
|
|
vht_cap = (void *)(vht_cap_ie + 2);
|
|
tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
|
|
for (nss = 8; nss > 0; nss--) {
|
|
if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
|
|
IEEE80211_VHT_MCS_NOT_SUPPORTED)
|
|
break;
|
|
}
|
|
/* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
|
|
chains = max(chains, nss);
|
|
}
|
|
|
|
return chains;
|
|
}
|
|
|
|
static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_bss *cbss)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
const struct ieee80211_ht_operation *ht_oper = NULL;
|
|
const struct ieee80211_vht_operation *vht_oper = NULL;
|
|
struct ieee80211_supported_band *sband;
|
|
struct cfg80211_chan_def chandef;
|
|
int ret;
|
|
|
|
sband = local->hw.wiphy->bands[cbss->channel->band];
|
|
|
|
ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
|
|
IEEE80211_STA_DISABLE_80P80MHZ |
|
|
IEEE80211_STA_DISABLE_160MHZ);
|
|
|
|
rcu_read_lock();
|
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
|
|
sband->ht_cap.ht_supported) {
|
|
const u8 *ht_oper_ie, *ht_cap;
|
|
|
|
ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
|
|
if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
|
|
ht_oper = (void *)(ht_oper_ie + 2);
|
|
|
|
ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
|
|
if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
|
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
|
|
ht_oper = NULL;
|
|
}
|
|
}
|
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
|
|
sband->vht_cap.vht_supported) {
|
|
const u8 *vht_oper_ie, *vht_cap;
|
|
|
|
vht_oper_ie = ieee80211_bss_get_ie(cbss,
|
|
WLAN_EID_VHT_OPERATION);
|
|
if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
|
|
vht_oper = (void *)(vht_oper_ie + 2);
|
|
if (vht_oper && !ht_oper) {
|
|
vht_oper = NULL;
|
|
sdata_info(sdata,
|
|
"AP advertised VHT without HT, disabling both\n");
|
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
|
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
|
|
}
|
|
|
|
vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
|
|
if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
|
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
|
|
vht_oper = NULL;
|
|
}
|
|
}
|
|
|
|
ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
|
|
cbss->channel,
|
|
ht_oper, vht_oper,
|
|
&chandef, true);
|
|
|
|
sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
|
|
local->rx_chains);
|
|
|
|
rcu_read_unlock();
|
|
|
|
/* will change later if needed */
|
|
sdata->smps_mode = IEEE80211_SMPS_OFF;
|
|
|
|
/*
|
|
* If this fails (possibly due to channel context sharing
|
|
* on incompatible channels, e.g. 80+80 and 160 sharing the
|
|
* same control channel) try to use a smaller bandwidth.
|
|
*/
|
|
ret = ieee80211_vif_use_channel(sdata, &chandef,
|
|
IEEE80211_CHANCTX_SHARED);
|
|
while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
|
|
ifmgd->flags |= chandef_downgrade(&chandef);
|
|
ret = ieee80211_vif_use_channel(sdata, &chandef,
|
|
IEEE80211_CHANCTX_SHARED);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_bss *cbss, bool assoc)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_bss *bss = (void *)cbss->priv;
|
|
struct sta_info *new_sta = NULL;
|
|
bool have_sta = false;
|
|
int err;
|
|
|
|
if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
|
|
return -EINVAL;
|
|
|
|
if (assoc) {
|
|
rcu_read_lock();
|
|
have_sta = sta_info_get(sdata, cbss->bssid);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
if (!have_sta) {
|
|
new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
|
|
if (!new_sta)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (new_sta) {
|
|
u32 rates = 0, basic_rates = 0;
|
|
bool have_higher_than_11mbit;
|
|
int min_rate = INT_MAX, min_rate_index = -1;
|
|
struct ieee80211_supported_band *sband;
|
|
const struct cfg80211_bss_ies *ies;
|
|
|
|
sband = local->hw.wiphy->bands[cbss->channel->band];
|
|
|
|
err = ieee80211_prep_channel(sdata, cbss);
|
|
if (err) {
|
|
sta_info_free(local, new_sta);
|
|
return err;
|
|
}
|
|
|
|
ieee80211_get_rates(sband, bss->supp_rates,
|
|
bss->supp_rates_len,
|
|
&rates, &basic_rates,
|
|
&have_higher_than_11mbit,
|
|
&min_rate, &min_rate_index);
|
|
|
|
/*
|
|
* This used to be a workaround for basic rates missing
|
|
* in the association response frame. Now that we no
|
|
* longer use the basic rates from there, it probably
|
|
* doesn't happen any more, but keep the workaround so
|
|
* in case some *other* APs are buggy in different ways
|
|
* we can connect -- with a warning.
|
|
*/
|
|
if (!basic_rates && min_rate_index >= 0) {
|
|
sdata_info(sdata,
|
|
"No basic rates, using min rate instead\n");
|
|
basic_rates = BIT(min_rate_index);
|
|
}
|
|
|
|
new_sta->sta.supp_rates[cbss->channel->band] = rates;
|
|
sdata->vif.bss_conf.basic_rates = basic_rates;
|
|
|
|
/* cf. IEEE 802.11 9.2.12 */
|
|
if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
|
|
have_higher_than_11mbit)
|
|
sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
|
|
else
|
|
sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
|
|
|
|
memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
|
|
|
|
/* set timing information */
|
|
sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
|
|
rcu_read_lock();
|
|
ies = rcu_dereference(cbss->beacon_ies);
|
|
if (ies) {
|
|
const u8 *tim_ie;
|
|
|
|
sdata->vif.bss_conf.sync_tsf = ies->tsf;
|
|
sdata->vif.bss_conf.sync_device_ts =
|
|
bss->device_ts_beacon;
|
|
tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
|
|
ies->data, ies->len);
|
|
if (tim_ie && tim_ie[1] >= 2)
|
|
sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
|
|
else
|
|
sdata->vif.bss_conf.sync_dtim_count = 0;
|
|
} else if (!(local->hw.flags &
|
|
IEEE80211_HW_TIMING_BEACON_ONLY)) {
|
|
ies = rcu_dereference(cbss->proberesp_ies);
|
|
/* must be non-NULL since beacon IEs were NULL */
|
|
sdata->vif.bss_conf.sync_tsf = ies->tsf;
|
|
sdata->vif.bss_conf.sync_device_ts =
|
|
bss->device_ts_presp;
|
|
sdata->vif.bss_conf.sync_dtim_count = 0;
|
|
} else {
|
|
sdata->vif.bss_conf.sync_tsf = 0;
|
|
sdata->vif.bss_conf.sync_device_ts = 0;
|
|
sdata->vif.bss_conf.sync_dtim_count = 0;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
/* tell driver about BSSID, basic rates and timing */
|
|
ieee80211_bss_info_change_notify(sdata,
|
|
BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
|
|
BSS_CHANGED_BEACON_INT);
|
|
|
|
if (assoc)
|
|
sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
|
|
|
|
err = sta_info_insert(new_sta);
|
|
new_sta = NULL;
|
|
if (err) {
|
|
sdata_info(sdata,
|
|
"failed to insert STA entry for the AP (error %d)\n",
|
|
err);
|
|
return err;
|
|
}
|
|
} else
|
|
WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* config hooks */
|
|
int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_auth_request *req)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_mgd_auth_data *auth_data;
|
|
u16 auth_alg;
|
|
int err;
|
|
|
|
/* prepare auth data structure */
|
|
|
|
switch (req->auth_type) {
|
|
case NL80211_AUTHTYPE_OPEN_SYSTEM:
|
|
auth_alg = WLAN_AUTH_OPEN;
|
|
break;
|
|
case NL80211_AUTHTYPE_SHARED_KEY:
|
|
if (IS_ERR(local->wep_tx_tfm))
|
|
return -EOPNOTSUPP;
|
|
auth_alg = WLAN_AUTH_SHARED_KEY;
|
|
break;
|
|
case NL80211_AUTHTYPE_FT:
|
|
auth_alg = WLAN_AUTH_FT;
|
|
break;
|
|
case NL80211_AUTHTYPE_NETWORK_EAP:
|
|
auth_alg = WLAN_AUTH_LEAP;
|
|
break;
|
|
case NL80211_AUTHTYPE_SAE:
|
|
auth_alg = WLAN_AUTH_SAE;
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
|
|
req->ie_len, GFP_KERNEL);
|
|
if (!auth_data)
|
|
return -ENOMEM;
|
|
|
|
auth_data->bss = req->bss;
|
|
|
|
if (req->sae_data_len >= 4) {
|
|
__le16 *pos = (__le16 *) req->sae_data;
|
|
auth_data->sae_trans = le16_to_cpu(pos[0]);
|
|
auth_data->sae_status = le16_to_cpu(pos[1]);
|
|
memcpy(auth_data->data, req->sae_data + 4,
|
|
req->sae_data_len - 4);
|
|
auth_data->data_len += req->sae_data_len - 4;
|
|
}
|
|
|
|
if (req->ie && req->ie_len) {
|
|
memcpy(&auth_data->data[auth_data->data_len],
|
|
req->ie, req->ie_len);
|
|
auth_data->data_len += req->ie_len;
|
|
}
|
|
|
|
if (req->key && req->key_len) {
|
|
auth_data->key_len = req->key_len;
|
|
auth_data->key_idx = req->key_idx;
|
|
memcpy(auth_data->key, req->key, req->key_len);
|
|
}
|
|
|
|
auth_data->algorithm = auth_alg;
|
|
|
|
/* try to authenticate/probe */
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
|
|
if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
|
|
ifmgd->assoc_data) {
|
|
err = -EBUSY;
|
|
goto err_free;
|
|
}
|
|
|
|
if (ifmgd->auth_data)
|
|
ieee80211_destroy_auth_data(sdata, false);
|
|
|
|
/* prep auth_data so we don't go into idle on disassoc */
|
|
ifmgd->auth_data = auth_data;
|
|
|
|
if (ifmgd->associated)
|
|
ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
|
|
|
|
sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
|
|
|
|
err = ieee80211_prep_connection(sdata, req->bss, false);
|
|
if (err)
|
|
goto err_clear;
|
|
|
|
err = ieee80211_probe_auth(sdata);
|
|
if (err) {
|
|
sta_info_destroy_addr(sdata, req->bss->bssid);
|
|
goto err_clear;
|
|
}
|
|
|
|
/* hold our own reference */
|
|
cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
|
|
err = 0;
|
|
goto out_unlock;
|
|
|
|
err_clear:
|
|
memset(ifmgd->bssid, 0, ETH_ALEN);
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
|
|
ifmgd->auth_data = NULL;
|
|
err_free:
|
|
kfree(auth_data);
|
|
out_unlock:
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
return err;
|
|
}
|
|
|
|
int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_assoc_request *req)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_bss *bss = (void *)req->bss->priv;
|
|
struct ieee80211_mgd_assoc_data *assoc_data;
|
|
const struct cfg80211_bss_ies *beacon_ies;
|
|
struct ieee80211_supported_band *sband;
|
|
const u8 *ssidie, *ht_ie, *vht_ie;
|
|
int i, err;
|
|
|
|
assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
|
|
if (!assoc_data)
|
|
return -ENOMEM;
|
|
|
|
rcu_read_lock();
|
|
ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
|
|
if (!ssidie) {
|
|
rcu_read_unlock();
|
|
kfree(assoc_data);
|
|
return -EINVAL;
|
|
}
|
|
memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
|
|
assoc_data->ssid_len = ssidie[1];
|
|
rcu_read_unlock();
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
|
|
if (ifmgd->associated)
|
|
ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
|
|
|
|
if (ifmgd->auth_data && !ifmgd->auth_data->done) {
|
|
err = -EBUSY;
|
|
goto err_free;
|
|
}
|
|
|
|
if (ifmgd->assoc_data) {
|
|
err = -EBUSY;
|
|
goto err_free;
|
|
}
|
|
|
|
if (ifmgd->auth_data) {
|
|
bool match;
|
|
|
|
/* keep sta info, bssid if matching */
|
|
match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
|
|
ieee80211_destroy_auth_data(sdata, match);
|
|
}
|
|
|
|
/* prepare assoc data */
|
|
|
|
ifmgd->beacon_crc_valid = false;
|
|
|
|
/*
|
|
* IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
|
|
* We still associate in non-HT mode (11a/b/g) if any one of these
|
|
* ciphers is configured as pairwise.
|
|
* We can set this to true for non-11n hardware, that'll be checked
|
|
* separately along with the peer capabilities.
|
|
*/
|
|
for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
|
|
if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
|
|
req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
|
|
req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
|
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
|
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
|
|
netdev_info(sdata->dev,
|
|
"disabling HT/VHT due to WEP/TKIP use\n");
|
|
}
|
|
}
|
|
|
|
if (req->flags & ASSOC_REQ_DISABLE_HT) {
|
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
|
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
|
|
}
|
|
|
|
if (req->flags & ASSOC_REQ_DISABLE_VHT)
|
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
|
|
|
|
/* Also disable HT if we don't support it or the AP doesn't use WMM */
|
|
sband = local->hw.wiphy->bands[req->bss->channel->band];
|
|
if (!sband->ht_cap.ht_supported ||
|
|
local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
|
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
|
|
if (!bss->wmm_used)
|
|
netdev_info(sdata->dev,
|
|
"disabling HT as WMM/QoS is not supported by the AP\n");
|
|
}
|
|
|
|
/* disable VHT if we don't support it or the AP doesn't use WMM */
|
|
if (!sband->vht_cap.vht_supported ||
|
|
local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
|
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
|
|
if (!bss->wmm_used)
|
|
netdev_info(sdata->dev,
|
|
"disabling VHT as WMM/QoS is not supported by the AP\n");
|
|
}
|
|
|
|
memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
|
|
memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
|
|
sizeof(ifmgd->ht_capa_mask));
|
|
|
|
memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
|
|
memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
|
|
sizeof(ifmgd->vht_capa_mask));
|
|
|
|
if (req->ie && req->ie_len) {
|
|
memcpy(assoc_data->ie, req->ie, req->ie_len);
|
|
assoc_data->ie_len = req->ie_len;
|
|
}
|
|
|
|
assoc_data->bss = req->bss;
|
|
|
|
if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
|
|
if (ifmgd->powersave)
|
|
sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
|
|
else
|
|
sdata->smps_mode = IEEE80211_SMPS_OFF;
|
|
} else
|
|
sdata->smps_mode = ifmgd->req_smps;
|
|
|
|
assoc_data->capability = req->bss->capability;
|
|
assoc_data->wmm = bss->wmm_used &&
|
|
(local->hw.queues >= IEEE80211_NUM_ACS);
|
|
assoc_data->supp_rates = bss->supp_rates;
|
|
assoc_data->supp_rates_len = bss->supp_rates_len;
|
|
|
|
rcu_read_lock();
|
|
ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
|
|
if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
|
|
assoc_data->ap_ht_param =
|
|
((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
|
|
else
|
|
ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
|
|
vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
|
|
if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
|
|
memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
|
|
sizeof(struct ieee80211_vht_cap));
|
|
else
|
|
ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
|
|
rcu_read_unlock();
|
|
|
|
if (bss->wmm_used && bss->uapsd_supported &&
|
|
(sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
|
|
assoc_data->uapsd = true;
|
|
ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
|
|
} else {
|
|
assoc_data->uapsd = false;
|
|
ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
|
|
}
|
|
|
|
if (req->prev_bssid)
|
|
memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
|
|
|
|
if (req->use_mfp) {
|
|
ifmgd->mfp = IEEE80211_MFP_REQUIRED;
|
|
ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
|
|
} else {
|
|
ifmgd->mfp = IEEE80211_MFP_DISABLED;
|
|
ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
|
|
}
|
|
|
|
if (req->crypto.control_port)
|
|
ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
|
|
else
|
|
ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
|
|
|
|
sdata->control_port_protocol = req->crypto.control_port_ethertype;
|
|
sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
|
|
|
|
/* kick off associate process */
|
|
|
|
ifmgd->assoc_data = assoc_data;
|
|
ifmgd->dtim_period = 0;
|
|
|
|
err = ieee80211_prep_connection(sdata, req->bss, true);
|
|
if (err)
|
|
goto err_clear;
|
|
|
|
rcu_read_lock();
|
|
beacon_ies = rcu_dereference(req->bss->beacon_ies);
|
|
|
|
if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
|
|
!beacon_ies) {
|
|
/*
|
|
* Wait up to one beacon interval ...
|
|
* should this be more if we miss one?
|
|
*/
|
|
sdata_info(sdata, "waiting for beacon from %pM\n",
|
|
ifmgd->bssid);
|
|
assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
|
|
assoc_data->timeout_started = true;
|
|
assoc_data->need_beacon = true;
|
|
} else if (beacon_ies) {
|
|
const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
|
|
beacon_ies->data,
|
|
beacon_ies->len);
|
|
u8 dtim_count = 0;
|
|
|
|
if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
|
|
const struct ieee80211_tim_ie *tim;
|
|
tim = (void *)(tim_ie + 2);
|
|
ifmgd->dtim_period = tim->dtim_period;
|
|
dtim_count = tim->dtim_count;
|
|
}
|
|
assoc_data->have_beacon = true;
|
|
assoc_data->timeout = jiffies;
|
|
assoc_data->timeout_started = true;
|
|
|
|
if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
|
|
sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
|
|
sdata->vif.bss_conf.sync_device_ts =
|
|
bss->device_ts_beacon;
|
|
sdata->vif.bss_conf.sync_dtim_count = dtim_count;
|
|
}
|
|
} else {
|
|
assoc_data->timeout = jiffies;
|
|
assoc_data->timeout_started = true;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
run_again(ifmgd, assoc_data->timeout);
|
|
|
|
if (bss->corrupt_data) {
|
|
char *corrupt_type = "data";
|
|
if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
|
|
if (bss->corrupt_data &
|
|
IEEE80211_BSS_CORRUPT_PROBE_RESP)
|
|
corrupt_type = "beacon and probe response";
|
|
else
|
|
corrupt_type = "beacon";
|
|
} else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
|
|
corrupt_type = "probe response";
|
|
sdata_info(sdata, "associating with AP with corrupt %s\n",
|
|
corrupt_type);
|
|
}
|
|
|
|
err = 0;
|
|
goto out;
|
|
err_clear:
|
|
memset(ifmgd->bssid, 0, ETH_ALEN);
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
|
|
ifmgd->assoc_data = NULL;
|
|
err_free:
|
|
kfree(assoc_data);
|
|
out:
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
return err;
|
|
}
|
|
|
|
int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_deauth_request *req)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
|
|
bool tx = !req->local_state_change;
|
|
bool sent_frame = false;
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
|
|
sdata_info(sdata,
|
|
"deauthenticating from %pM by local choice (reason=%d)\n",
|
|
req->bssid, req->reason_code);
|
|
|
|
if (ifmgd->auth_data) {
|
|
drv_mgd_prepare_tx(sdata->local, sdata);
|
|
ieee80211_send_deauth_disassoc(sdata, req->bssid,
|
|
IEEE80211_STYPE_DEAUTH,
|
|
req->reason_code, tx,
|
|
frame_buf);
|
|
ieee80211_destroy_auth_data(sdata, false);
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
sent_frame = tx;
|
|
goto out;
|
|
}
|
|
|
|
if (ifmgd->associated &&
|
|
ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
|
|
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
|
|
req->reason_code, tx, frame_buf);
|
|
sent_frame = tx;
|
|
}
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
out:
|
|
if (sent_frame)
|
|
__cfg80211_send_deauth(sdata->dev, frame_buf,
|
|
IEEE80211_DEAUTH_FRAME_LEN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_disassoc_request *req)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
u8 bssid[ETH_ALEN];
|
|
u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
|
|
/*
|
|
* cfg80211 should catch this ... but it's racy since
|
|
* we can receive a disassoc frame, process it, hand it
|
|
* to cfg80211 while that's in a locked section already
|
|
* trying to tell us that the user wants to disconnect.
|
|
*/
|
|
if (ifmgd->associated != req->bss) {
|
|
mutex_unlock(&ifmgd->mtx);
|
|
return -ENOLINK;
|
|
}
|
|
|
|
sdata_info(sdata,
|
|
"disassociating from %pM by local choice (reason=%d)\n",
|
|
req->bss->bssid, req->reason_code);
|
|
|
|
memcpy(bssid, req->bss->bssid, ETH_ALEN);
|
|
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
|
|
req->reason_code, !req->local_state_change,
|
|
frame_buf);
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
__cfg80211_send_disassoc(sdata->dev, frame_buf,
|
|
IEEE80211_DEAUTH_FRAME_LEN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
/*
|
|
* Make sure some work items will not run after this,
|
|
* they will not do anything but might not have been
|
|
* cancelled when disconnecting.
|
|
*/
|
|
cancel_work_sync(&ifmgd->monitor_work);
|
|
cancel_work_sync(&ifmgd->beacon_connection_loss_work);
|
|
cancel_work_sync(&ifmgd->request_smps_work);
|
|
cancel_work_sync(&ifmgd->csa_connection_drop_work);
|
|
cancel_work_sync(&ifmgd->chswitch_work);
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
if (ifmgd->assoc_data)
|
|
ieee80211_destroy_assoc_data(sdata, false);
|
|
if (ifmgd->auth_data)
|
|
ieee80211_destroy_auth_data(sdata, false);
|
|
del_timer_sync(&ifmgd->timer);
|
|
mutex_unlock(&ifmgd->mtx);
|
|
}
|
|
|
|
void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
|
|
enum nl80211_cqm_rssi_threshold_event rssi_event,
|
|
gfp_t gfp)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
|
|
trace_api_cqm_rssi_notify(sdata, rssi_event);
|
|
|
|
cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
|