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![Jouni Malinen](/assets/img/avatar_default.png)
When the queued management work items are processed in ieee80211_sta_work() an item could be removed. This could change the anybusy from true to false, so we better check whether we can start a new scan only after having processed the pending work first. Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2572 lines
69 KiB
C
2572 lines
69 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/rtnetlink.h>
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#include <linux/pm_qos_params.h>
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#include <linux/crc32.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_MAX_TRIES 3
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#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
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#define IEEE80211_ASSOC_MAX_TRIES 3
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#define IEEE80211_MAX_PROBE_TRIES 5
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/*
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* beacon loss detection timeout
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* XXX: should depend on beacon interval
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*/
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#define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
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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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#define IEEE80211_PROBE_WAIT (HZ / 2)
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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_rx_auth() */
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RX_MGMT_CFG80211_AUTH,
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/* caller must call cfg80211_send_rx_assoc() */
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RX_MGMT_CFG80211_ASSOC,
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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_auth_timeout() & free work */
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RX_MGMT_CFG80211_AUTH_TO,
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/* caller must call cfg80211_assoc_timeout() & free work */
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RX_MGMT_CFG80211_ASSOC_TO,
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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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WARN_ON(!mutex_is_locked(&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,
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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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static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
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{
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if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
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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 + IEEE80211_BEACON_LOSS_TIME));
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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 int ieee80211_compatible_rates(struct ieee80211_bss *bss,
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struct ieee80211_supported_band *sband,
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u32 *rates)
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{
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int i, j, count;
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*rates = 0;
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count = 0;
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for (i = 0; i < bss->supp_rates_len; i++) {
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int rate = (bss->supp_rates[i] & 0x7F) * 5;
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for (j = 0; j < sband->n_bitrates; j++)
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if (sband->bitrates[j].bitrate == rate) {
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*rates |= BIT(j);
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count++;
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break;
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}
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}
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return count;
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}
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/*
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* ieee80211_enable_ht should be called only after the operating band
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* has been determined as ht configuration depends on the hw's
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* HT abilities for a specific band.
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*/
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static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_ht_info *hti,
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const u8 *bssid, u16 ap_ht_cap_flags)
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{
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_supported_band *sband;
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struct sta_info *sta;
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u32 changed = 0;
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u16 ht_opmode;
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bool enable_ht = true, ht_changed;
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enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
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sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
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/* HT is not supported */
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if (!sband->ht_cap.ht_supported)
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enable_ht = false;
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/* check that channel matches the right operating channel */
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if (local->hw.conf.channel->center_freq !=
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ieee80211_channel_to_frequency(hti->control_chan))
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enable_ht = false;
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if (enable_ht) {
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channel_type = NL80211_CHAN_HT20;
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if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
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(sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
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(hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
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switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
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case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
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if (!(local->hw.conf.channel->flags &
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IEEE80211_CHAN_NO_HT40PLUS))
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channel_type = NL80211_CHAN_HT40PLUS;
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break;
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case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
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if (!(local->hw.conf.channel->flags &
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IEEE80211_CHAN_NO_HT40MINUS))
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channel_type = NL80211_CHAN_HT40MINUS;
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break;
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}
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}
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}
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ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
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channel_type != local->hw.conf.channel_type;
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local->oper_channel_type = channel_type;
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if (ht_changed) {
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/* channel_type change automatically detected */
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ieee80211_hw_config(local, 0);
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rcu_read_lock();
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sta = sta_info_get(local, bssid);
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if (sta)
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rate_control_rate_update(local, sband, sta,
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IEEE80211_RC_HT_CHANGED);
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rcu_read_unlock();
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}
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/* disable HT */
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if (!enable_ht)
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return 0;
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ht_opmode = le16_to_cpu(hti->operation_mode);
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/* if bss configuration changed store the new one */
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if (!sdata->ht_opmode_valid ||
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sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
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changed |= BSS_CHANGED_HT;
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sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
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sdata->ht_opmode_valid = true;
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}
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return changed;
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}
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/* frame sending functions */
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static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_mgd_work *wk)
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{
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struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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struct ieee80211_local *local = sdata->local;
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struct sk_buff *skb;
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struct ieee80211_mgmt *mgmt;
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u8 *pos;
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const u8 *ies, *ht_ie;
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int i, len, count, rates_len, supp_rates_len;
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u16 capab;
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int wmm = 0;
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struct ieee80211_supported_band *sband;
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u32 rates = 0;
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skb = dev_alloc_skb(local->hw.extra_tx_headroom +
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sizeof(*mgmt) + 200 + wk->ie_len +
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wk->ssid_len);
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if (!skb) {
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printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
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"frame\n", sdata->dev->name);
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return;
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}
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skb_reserve(skb, local->hw.extra_tx_headroom);
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sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
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capab = ifmgd->capab;
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if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
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if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
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capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
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if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
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capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
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}
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if (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
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capab |= WLAN_CAPABILITY_PRIVACY;
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if (wk->bss->wmm_used)
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wmm = 1;
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/* get all rates supported by the device and the AP as
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* some APs don't like getting a superset of their rates
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* in the association request (e.g. D-Link DAP 1353 in
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* b-only mode) */
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rates_len = ieee80211_compatible_rates(wk->bss, sband, &rates);
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if ((wk->bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
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(local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
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capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
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mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
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memset(mgmt, 0, 24);
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memcpy(mgmt->da, wk->bss->cbss.bssid, ETH_ALEN);
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memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
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memcpy(mgmt->bssid, wk->bss->cbss.bssid, ETH_ALEN);
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if (!is_zero_ether_addr(wk->prev_bssid)) {
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skb_put(skb, 10);
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mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
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IEEE80211_STYPE_REASSOC_REQ);
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mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
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mgmt->u.reassoc_req.listen_interval =
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cpu_to_le16(local->hw.conf.listen_interval);
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memcpy(mgmt->u.reassoc_req.current_ap, wk->prev_bssid,
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ETH_ALEN);
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} else {
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skb_put(skb, 4);
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mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
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IEEE80211_STYPE_ASSOC_REQ);
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mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
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mgmt->u.assoc_req.listen_interval =
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cpu_to_le16(local->hw.conf.listen_interval);
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}
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/* SSID */
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ies = pos = skb_put(skb, 2 + wk->ssid_len);
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*pos++ = WLAN_EID_SSID;
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*pos++ = wk->ssid_len;
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memcpy(pos, wk->ssid, wk->ssid_len);
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/* add all rates which were marked to be used above */
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supp_rates_len = rates_len;
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if (supp_rates_len > 8)
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supp_rates_len = 8;
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len = sband->n_bitrates;
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pos = skb_put(skb, supp_rates_len + 2);
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*pos++ = WLAN_EID_SUPP_RATES;
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*pos++ = supp_rates_len;
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count = 0;
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for (i = 0; i < sband->n_bitrates; i++) {
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if (BIT(i) & rates) {
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int rate = sband->bitrates[i].bitrate;
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*pos++ = (u8) (rate / 5);
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if (++count == 8)
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break;
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}
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}
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if (rates_len > count) {
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pos = skb_put(skb, rates_len - count + 2);
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*pos++ = WLAN_EID_EXT_SUPP_RATES;
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*pos++ = rates_len - count;
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for (i++; i < sband->n_bitrates; i++) {
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if (BIT(i) & rates) {
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int rate = sband->bitrates[i].bitrate;
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*pos++ = (u8) (rate / 5);
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}
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}
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}
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if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
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/* 1. power capabilities */
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pos = skb_put(skb, 4);
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*pos++ = WLAN_EID_PWR_CAPABILITY;
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*pos++ = 2;
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*pos++ = 0; /* min tx power */
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*pos++ = local->hw.conf.channel->max_power; /* max tx power */
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/* 2. supported channels */
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/* TODO: get this in reg domain format */
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pos = skb_put(skb, 2 * sband->n_channels + 2);
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*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
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*pos++ = 2 * sband->n_channels;
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for (i = 0; i < sband->n_channels; i++) {
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*pos++ = ieee80211_frequency_to_channel(
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sband->channels[i].center_freq);
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*pos++ = 1; /* one channel in the subband*/
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}
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}
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if (wk->ie_len && wk->ie) {
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pos = skb_put(skb, wk->ie_len);
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memcpy(pos, wk->ie, wk->ie_len);
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}
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if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
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pos = skb_put(skb, 9);
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*pos++ = WLAN_EID_VENDOR_SPECIFIC;
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*pos++ = 7; /* len */
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*pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
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*pos++ = 0x50;
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*pos++ = 0xf2;
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*pos++ = 2; /* WME */
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*pos++ = 0; /* WME info */
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*pos++ = 1; /* WME ver */
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*pos++ = 0;
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}
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/* wmm support is a must to HT */
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/*
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* IEEE802.11n does not allow TKIP/WEP as pairwise
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* ciphers in HT mode. We still associate in non-ht
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* mode (11a/b/g) if any one of these ciphers is
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* configured as pairwise.
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*/
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if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
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sband->ht_cap.ht_supported &&
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(ht_ie = ieee80211_bss_get_ie(&wk->bss->cbss, WLAN_EID_HT_INFORMATION)) &&
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ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
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(!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
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struct ieee80211_ht_info *ht_info =
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(struct ieee80211_ht_info *)(ht_ie + 2);
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u16 cap = sband->ht_cap.cap;
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__le16 tmp;
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u32 flags = local->hw.conf.channel->flags;
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switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
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case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
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if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
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cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
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cap &= ~IEEE80211_HT_CAP_SGI_40;
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}
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break;
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case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
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if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
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cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
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cap &= ~IEEE80211_HT_CAP_SGI_40;
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}
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break;
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}
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tmp = cpu_to_le16(cap);
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pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
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*pos++ = WLAN_EID_HT_CAPABILITY;
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*pos++ = sizeof(struct ieee80211_ht_cap);
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memset(pos, 0, sizeof(struct ieee80211_ht_cap));
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memcpy(pos, &tmp, sizeof(u16));
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pos += sizeof(u16);
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/* TODO: needs a define here for << 2 */
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*pos++ = sband->ht_cap.ampdu_factor |
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(sband->ht_cap.ampdu_density << 2);
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memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
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}
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ieee80211_tx_skb(sdata, skb, 0);
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}
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static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
|
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const u8 *bssid, u16 stype, u16 reason,
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void *cookie)
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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 sk_buff *skb;
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struct ieee80211_mgmt *mgmt;
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skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
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if (!skb) {
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printk(KERN_DEBUG "%s: failed to allocate buffer for "
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"deauth/disassoc frame\n", sdata->dev->name);
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return;
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}
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skb_reserve(skb, local->hw.extra_tx_headroom);
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mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
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memset(mgmt, 0, 24);
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memcpy(mgmt->da, bssid, ETH_ALEN);
|
|
memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
|
|
memcpy(mgmt->bssid, bssid, ETH_ALEN);
|
|
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
|
|
skb_put(skb, 2);
|
|
/* u.deauth.reason_code == u.disassoc.reason_code */
|
|
mgmt->u.deauth.reason_code = cpu_to_le16(reason);
|
|
|
|
if (stype == IEEE80211_STYPE_DEAUTH)
|
|
cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, cookie);
|
|
else
|
|
cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len, cookie);
|
|
ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
|
|
}
|
|
|
|
void ieee80211_send_pspoll(struct ieee80211_local *local,
|
|
struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_pspoll *pspoll;
|
|
struct sk_buff *skb;
|
|
u16 fc;
|
|
|
|
skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
|
|
if (!skb) {
|
|
printk(KERN_DEBUG "%s: failed to allocate buffer for "
|
|
"pspoll frame\n", sdata->dev->name);
|
|
return;
|
|
}
|
|
skb_reserve(skb, local->hw.extra_tx_headroom);
|
|
|
|
pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
|
|
memset(pspoll, 0, sizeof(*pspoll));
|
|
fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
|
|
pspoll->frame_control = cpu_to_le16(fc);
|
|
pspoll->aid = cpu_to_le16(ifmgd->aid);
|
|
|
|
/* aid in PS-Poll has its two MSBs each set to 1 */
|
|
pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
|
|
|
|
memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
|
|
memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
|
|
|
|
ieee80211_tx_skb(sdata, skb, 0);
|
|
}
|
|
|
|
void ieee80211_send_nullfunc(struct ieee80211_local *local,
|
|
struct ieee80211_sub_if_data *sdata,
|
|
int powersave)
|
|
{
|
|
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 + 24);
|
|
if (!skb) {
|
|
printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
|
|
"frame\n", sdata->dev->name);
|
|
return;
|
|
}
|
|
skb_reserve(skb, local->hw.extra_tx_headroom);
|
|
|
|
nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
|
|
memset(nullfunc, 0, 24);
|
|
fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
|
|
IEEE80211_FCTL_TODS);
|
|
if (powersave)
|
|
fc |= cpu_to_le16(IEEE80211_FCTL_PM);
|
|
nullfunc->frame_control = fc;
|
|
memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
|
|
memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
|
|
memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
|
|
|
|
ieee80211_tx_skb(sdata, skb, 0);
|
|
}
|
|
|
|
/* 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 (!netif_running(sdata->dev))
|
|
return;
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
if (!ifmgd->associated)
|
|
goto out;
|
|
|
|
sdata->local->oper_channel = sdata->local->csa_channel;
|
|
ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
|
|
|
|
/* XXX: shouldn't really modify cfg80211-owned data! */
|
|
ifmgd->associated->cbss.channel = sdata->local->oper_channel;
|
|
|
|
ieee80211_wake_queues_by_reason(&sdata->local->hw,
|
|
IEEE80211_QUEUE_STOP_REASON_CSA);
|
|
out:
|
|
ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
|
|
mutex_unlock(&ifmgd->mtx);
|
|
}
|
|
|
|
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,
|
|
struct ieee80211_channel_sw_ie *sw_elem,
|
|
struct ieee80211_bss *bss)
|
|
{
|
|
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);
|
|
|
|
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)
|
|
return;
|
|
|
|
sdata->local->csa_channel = new_ch;
|
|
|
|
if (sw_elem->count <= 1) {
|
|
ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
|
|
} else {
|
|
ieee80211_stop_queues_by_reason(&sdata->local->hw,
|
|
IEEE80211_QUEUE_STOP_REASON_CSA);
|
|
ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
|
|
mod_timer(&ifmgd->chswitch_timer,
|
|
jiffies +
|
|
msecs_to_jiffies(sw_elem->count *
|
|
bss->cbss.beacon_interval));
|
|
}
|
|
}
|
|
|
|
static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
|
|
u16 capab_info, u8 *pwr_constr_elem,
|
|
u8 pwr_constr_elem_len)
|
|
{
|
|
struct ieee80211_conf *conf = &sdata->local->hw.conf;
|
|
|
|
if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
|
|
return;
|
|
|
|
/* Power constraint IE length should be 1 octet */
|
|
if (pwr_constr_elem_len != 1)
|
|
return;
|
|
|
|
if ((*pwr_constr_elem <= conf->channel->max_power) &&
|
|
(*pwr_constr_elem != sdata->local->power_constr_level)) {
|
|
sdata->local->power_constr_level = *pwr_constr_elem;
|
|
ieee80211_hw_config(sdata->local, 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);
|
|
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);
|
|
}
|
|
}
|
|
|
|
/* 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;
|
|
|
|
if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
|
|
local->ps_sdata = NULL;
|
|
return;
|
|
}
|
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (!netif_running(sdata->dev))
|
|
continue;
|
|
if (sdata->vif.type != NL80211_IFTYPE_STATION)
|
|
continue;
|
|
found = sdata;
|
|
count++;
|
|
}
|
|
|
|
if (count == 1 && found->u.mgd.powersave &&
|
|
found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
|
|
!(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
|
|
IEEE80211_STA_CONNECTION_POLL))) {
|
|
s32 beaconint_us;
|
|
|
|
if (latency < 0)
|
|
latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
|
|
|
|
beaconint_us = ieee80211_tu_to_usec(
|
|
found->vif.bss_conf.beacon_int);
|
|
|
|
if (beaconint_us > latency) {
|
|
local->ps_sdata = NULL;
|
|
} else {
|
|
u8 dtimper = found->vif.bss_conf.dtim_period;
|
|
int maxslp = 1;
|
|
|
|
if (dtimper > 1)
|
|
maxslp = min_t(int, dtimper,
|
|
latency / beaconint_us);
|
|
|
|
local->hw.conf.max_sleep_period = maxslp;
|
|
local->ps_sdata = found;
|
|
}
|
|
} else {
|
|
local->ps_sdata = NULL;
|
|
}
|
|
|
|
ieee80211_change_ps(local);
|
|
}
|
|
|
|
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;
|
|
|
|
/* can only happen when PS was just disabled anyway */
|
|
if (!sdata)
|
|
return;
|
|
|
|
if (local->hw.conf.flags & IEEE80211_CONF_PS)
|
|
return;
|
|
|
|
if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
|
|
ieee80211_send_nullfunc(local, sdata, 1);
|
|
|
|
local->hw.conf.flags |= IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/* MLME */
|
|
static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
|
|
struct ieee80211_if_managed *ifmgd,
|
|
u8 *wmm_param, size_t wmm_param_len)
|
|
{
|
|
struct ieee80211_tx_queue_params params;
|
|
size_t left;
|
|
int count;
|
|
u8 *pos;
|
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
|
|
return;
|
|
|
|
if (!wmm_param)
|
|
return;
|
|
|
|
if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
|
|
return;
|
|
count = wmm_param[6] & 0x0f;
|
|
if (count == ifmgd->wmm_last_param_set)
|
|
return;
|
|
ifmgd->wmm_last_param_set = count;
|
|
|
|
pos = wmm_param + 8;
|
|
left = wmm_param_len - 8;
|
|
|
|
memset(¶ms, 0, sizeof(params));
|
|
|
|
local->wmm_acm = 0;
|
|
for (; left >= 4; left -= 4, pos += 4) {
|
|
int aci = (pos[0] >> 5) & 0x03;
|
|
int acm = (pos[0] >> 4) & 0x01;
|
|
int queue;
|
|
|
|
switch (aci) {
|
|
case 1: /* AC_BK */
|
|
queue = 3;
|
|
if (acm)
|
|
local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
|
|
break;
|
|
case 2: /* AC_VI */
|
|
queue = 1;
|
|
if (acm)
|
|
local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
|
|
break;
|
|
case 3: /* AC_VO */
|
|
queue = 0;
|
|
if (acm)
|
|
local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
|
|
break;
|
|
case 0: /* AC_BE */
|
|
default:
|
|
queue = 2;
|
|
if (acm)
|
|
local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
|
|
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);
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
|
|
"cWmin=%d cWmax=%d txop=%d\n",
|
|
wiphy_name(local->hw.wiphy), queue, aci, acm,
|
|
params.aifs, params.cw_min, params.cw_max, params.txop);
|
|
#endif
|
|
if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx)
|
|
printk(KERN_DEBUG "%s: failed to set TX queue "
|
|
"parameters for queue %d\n",
|
|
wiphy_name(local->hw.wiphy), queue);
|
|
}
|
|
}
|
|
|
|
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 (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 ieee80211_mgd_work *wk,
|
|
u32 bss_info_changed)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_bss *bss = wk->bss;
|
|
|
|
bss_info_changed |= BSS_CHANGED_ASSOC;
|
|
/* set timing information */
|
|
sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
|
|
sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
|
|
sdata->vif.bss_conf.dtim_period = bss->dtim_period;
|
|
|
|
bss_info_changed |= BSS_CHANGED_BEACON_INT;
|
|
bss_info_changed |= ieee80211_handle_bss_capability(sdata,
|
|
bss->cbss.capability, bss->has_erp_value, bss->erp_value);
|
|
|
|
sdata->u.mgd.associated = bss;
|
|
sdata->u.mgd.old_associate_work = wk;
|
|
memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
|
|
|
|
/* just to be sure */
|
|
sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
|
|
IEEE80211_STA_BEACON_POLL);
|
|
|
|
ieee80211_led_assoc(local, 1);
|
|
|
|
sdata->vif.bss_conf.assoc = 1;
|
|
/*
|
|
* For now just always ask the driver to update the basic rateset
|
|
* when we have associated, we aren't checking whether it actually
|
|
* changed or not.
|
|
*/
|
|
bss_info_changed |= BSS_CHANGED_BASIC_RATES;
|
|
|
|
/* And the BSSID changed - we're associated now */
|
|
bss_info_changed |= BSS_CHANGED_BSSID;
|
|
|
|
ieee80211_bss_info_change_notify(sdata, bss_info_changed);
|
|
|
|
mutex_lock(&local->iflist_mtx);
|
|
ieee80211_recalc_ps(local, -1);
|
|
mutex_unlock(&local->iflist_mtx);
|
|
|
|
netif_tx_start_all_queues(sdata->dev);
|
|
netif_carrier_on(sdata->dev);
|
|
}
|
|
|
|
static enum rx_mgmt_action __must_check
|
|
ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgd_work *wk)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
wk->tries++;
|
|
if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
|
|
printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
|
|
sdata->dev->name, wk->bss->cbss.bssid);
|
|
|
|
/*
|
|
* Most likely AP is not in the range so remove the
|
|
* bss struct for that AP.
|
|
*/
|
|
cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
|
|
|
|
/*
|
|
* We might have a pending scan which had no chance to run yet
|
|
* due to work needing to be done. Hence, queue the STAs work
|
|
* again for that.
|
|
*/
|
|
ieee80211_queue_work(&local->hw, &ifmgd->work);
|
|
return RX_MGMT_CFG80211_AUTH_TO;
|
|
}
|
|
|
|
printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
|
|
sdata->dev->name, wk->bss->cbss.bssid,
|
|
wk->tries);
|
|
|
|
/*
|
|
* 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, wk->ssid, wk->ssid_len, NULL, 0);
|
|
|
|
wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
|
|
run_again(ifmgd, wk->timeout);
|
|
|
|
return RX_MGMT_NONE;
|
|
}
|
|
|
|
|
|
static enum rx_mgmt_action __must_check
|
|
ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgd_work *wk)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
wk->tries++;
|
|
if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
|
|
printk(KERN_DEBUG "%s: authentication with AP %pM"
|
|
" timed out\n",
|
|
sdata->dev->name, wk->bss->cbss.bssid);
|
|
|
|
/*
|
|
* Most likely AP is not in the range so remove the
|
|
* bss struct for that AP.
|
|
*/
|
|
cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
|
|
|
|
/*
|
|
* We might have a pending scan which had no chance to run yet
|
|
* due to work needing to be done. Hence, queue the STAs work
|
|
* again for that.
|
|
*/
|
|
ieee80211_queue_work(&local->hw, &ifmgd->work);
|
|
return RX_MGMT_CFG80211_AUTH_TO;
|
|
}
|
|
|
|
printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
|
|
sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
|
|
|
|
ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
|
|
wk->bss->cbss.bssid, NULL, 0, 0);
|
|
wk->auth_transaction = 2;
|
|
|
|
wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
|
|
run_again(ifmgd, wk->timeout);
|
|
|
|
return RX_MGMT_NONE;
|
|
}
|
|
|
|
static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
|
|
bool deauth)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sta_info *sta;
|
|
u32 changed = 0, config_changed = 0;
|
|
u8 bssid[ETH_ALEN];
|
|
|
|
ASSERT_MGD_MTX(ifmgd);
|
|
|
|
if (WARN_ON(!ifmgd->associated))
|
|
return;
|
|
|
|
memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
|
|
|
|
ifmgd->associated = NULL;
|
|
memset(ifmgd->bssid, 0, ETH_ALEN);
|
|
|
|
if (deauth) {
|
|
kfree(ifmgd->old_associate_work);
|
|
ifmgd->old_associate_work = NULL;
|
|
} else {
|
|
struct ieee80211_mgd_work *wk = ifmgd->old_associate_work;
|
|
|
|
wk->state = IEEE80211_MGD_STATE_IDLE;
|
|
list_add(&wk->list, &ifmgd->work_list);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
|
|
rcu_read_lock();
|
|
sta = sta_info_get(local, bssid);
|
|
if (sta)
|
|
ieee80211_sta_tear_down_BA_sessions(sta);
|
|
rcu_read_unlock();
|
|
|
|
changed |= ieee80211_reset_erp_info(sdata);
|
|
|
|
ieee80211_led_assoc(local, 0);
|
|
changed |= BSS_CHANGED_ASSOC;
|
|
sdata->vif.bss_conf.assoc = false;
|
|
|
|
ieee80211_set_wmm_default(sdata);
|
|
|
|
ieee80211_recalc_idle(local);
|
|
|
|
/* channel(_type) changes are handled by ieee80211_hw_config */
|
|
local->oper_channel_type = NL80211_CHAN_NO_HT;
|
|
|
|
/* on the next assoc, re-program HT parameters */
|
|
sdata->ht_opmode_valid = false;
|
|
|
|
local->power_constr_level = 0;
|
|
|
|
del_timer_sync(&local->dynamic_ps_timer);
|
|
cancel_work_sync(&local->dynamic_ps_enable_work);
|
|
|
|
if (local->hw.conf.flags & IEEE80211_CONF_PS) {
|
|
local->hw.conf.flags &= ~IEEE80211_CONF_PS;
|
|
config_changed |= IEEE80211_CONF_CHANGE_PS;
|
|
}
|
|
|
|
ieee80211_hw_config(local, config_changed);
|
|
|
|
/* And the BSSID changed -- not very interesting here */
|
|
changed |= BSS_CHANGED_BSSID;
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
|
|
rcu_read_lock();
|
|
|
|
sta = sta_info_get(local, bssid);
|
|
if (!sta) {
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
|
|
sta_info_unlink(&sta);
|
|
|
|
rcu_read_unlock();
|
|
|
|
sta_info_destroy(sta);
|
|
}
|
|
|
|
static enum rx_mgmt_action __must_check
|
|
ieee80211_associate(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgd_work *wk)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
wk->tries++;
|
|
if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
|
|
printk(KERN_DEBUG "%s: association with AP %pM"
|
|
" timed out\n",
|
|
sdata->dev->name, wk->bss->cbss.bssid);
|
|
|
|
/*
|
|
* Most likely AP is not in the range so remove the
|
|
* bss struct for that AP.
|
|
*/
|
|
cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
|
|
|
|
/*
|
|
* We might have a pending scan which had no chance to run yet
|
|
* due to work needing to be done. Hence, queue the STAs work
|
|
* again for that.
|
|
*/
|
|
ieee80211_queue_work(&local->hw, &ifmgd->work);
|
|
return RX_MGMT_CFG80211_ASSOC_TO;
|
|
}
|
|
|
|
printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
|
|
sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
|
|
ieee80211_send_assoc(sdata, wk);
|
|
|
|
wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
|
|
run_again(ifmgd, wk->timeout);
|
|
|
|
return RX_MGMT_NONE;
|
|
}
|
|
|
|
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;
|
|
|
|
mod_timer(&sdata->u.mgd.conn_mon_timer,
|
|
round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
|
|
}
|
|
|
|
static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
const u8 *ssid;
|
|
|
|
ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
|
|
ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
|
|
ssid + 2, ssid[1], NULL, 0);
|
|
|
|
ifmgd->probe_send_count++;
|
|
ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
|
|
run_again(ifmgd, ifmgd->probe_timeout);
|
|
}
|
|
|
|
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 (!netif_running(sdata->dev))
|
|
return;
|
|
|
|
if (sdata->local->scanning)
|
|
return;
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
|
|
if (!ifmgd->associated)
|
|
goto out;
|
|
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
if (beacon && net_ratelimit())
|
|
printk(KERN_DEBUG "%s: detected beacon loss from AP "
|
|
"- sending probe request\n", sdata->dev->name);
|
|
#endif
|
|
|
|
/*
|
|
* 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;
|
|
|
|
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);
|
|
}
|
|
|
|
void ieee80211_beacon_loss_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
container_of(work, struct ieee80211_sub_if_data,
|
|
u.mgd.beacon_loss_work);
|
|
|
|
ieee80211_mgd_probe_ap(sdata, true);
|
|
}
|
|
|
|
void ieee80211_beacon_loss(struct ieee80211_vif *vif)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_beacon_loss);
|
|
|
|
static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgd_work *wk)
|
|
{
|
|
wk->state = IEEE80211_MGD_STATE_IDLE;
|
|
printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
|
|
}
|
|
|
|
|
|
static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgd_work *wk,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len)
|
|
{
|
|
u8 *pos;
|
|
struct ieee802_11_elems elems;
|
|
|
|
pos = mgmt->u.auth.variable;
|
|
ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
|
|
if (!elems.challenge)
|
|
return;
|
|
ieee80211_send_auth(sdata, 3, wk->auth_alg,
|
|
elems.challenge - 2, elems.challenge_len + 2,
|
|
wk->bss->cbss.bssid,
|
|
wk->key, wk->key_len, wk->key_idx);
|
|
wk->auth_transaction = 4;
|
|
}
|
|
|
|
static enum rx_mgmt_action __must_check
|
|
ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgd_work *wk,
|
|
struct ieee80211_mgmt *mgmt, size_t len)
|
|
{
|
|
u16 auth_alg, auth_transaction, status_code;
|
|
|
|
if (wk->state != IEEE80211_MGD_STATE_AUTH)
|
|
return RX_MGMT_NONE;
|
|
|
|
if (len < 24 + 6)
|
|
return RX_MGMT_NONE;
|
|
|
|
if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
|
|
return RX_MGMT_NONE;
|
|
|
|
if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
|
|
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 != wk->auth_alg ||
|
|
auth_transaction != wk->auth_transaction)
|
|
return RX_MGMT_NONE;
|
|
|
|
if (status_code != WLAN_STATUS_SUCCESS) {
|
|
list_del(&wk->list);
|
|
kfree(wk);
|
|
return RX_MGMT_CFG80211_AUTH;
|
|
}
|
|
|
|
switch (wk->auth_alg) {
|
|
case WLAN_AUTH_OPEN:
|
|
case WLAN_AUTH_LEAP:
|
|
case WLAN_AUTH_FT:
|
|
ieee80211_auth_completed(sdata, wk);
|
|
return RX_MGMT_CFG80211_AUTH;
|
|
case WLAN_AUTH_SHARED_KEY:
|
|
if (wk->auth_transaction == 4) {
|
|
ieee80211_auth_completed(sdata, wk);
|
|
return RX_MGMT_CFG80211_AUTH;
|
|
} else
|
|
ieee80211_auth_challenge(sdata, wk, mgmt, len);
|
|
break;
|
|
}
|
|
|
|
return RX_MGMT_NONE;
|
|
}
|
|
|
|
|
|
static enum rx_mgmt_action __must_check
|
|
ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgd_work *wk,
|
|
struct ieee80211_mgmt *mgmt, size_t len)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
const u8 *bssid = NULL;
|
|
u16 reason_code;
|
|
|
|
if (len < 24 + 2)
|
|
return RX_MGMT_NONE;
|
|
|
|
ASSERT_MGD_MTX(ifmgd);
|
|
|
|
if (wk)
|
|
bssid = wk->bss->cbss.bssid;
|
|
else
|
|
bssid = ifmgd->associated->cbss.bssid;
|
|
|
|
reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
|
|
|
|
printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
|
|
sdata->dev->name, bssid, reason_code);
|
|
|
|
if (!wk) {
|
|
ieee80211_set_disassoc(sdata, true);
|
|
} else {
|
|
list_del(&wk->list);
|
|
kfree(wk);
|
|
}
|
|
|
|
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;
|
|
|
|
if (len < 24 + 2)
|
|
return RX_MGMT_NONE;
|
|
|
|
ASSERT_MGD_MTX(ifmgd);
|
|
|
|
if (WARN_ON(!ifmgd->associated))
|
|
return RX_MGMT_NONE;
|
|
|
|
if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
|
|
return RX_MGMT_NONE;
|
|
|
|
reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
|
|
|
|
printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
|
|
sdata->dev->name, reason_code);
|
|
|
|
ieee80211_set_disassoc(sdata, false);
|
|
return RX_MGMT_CFG80211_DISASSOC;
|
|
}
|
|
|
|
|
|
static enum rx_mgmt_action __must_check
|
|
ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgd_work *wk,
|
|
struct ieee80211_mgmt *mgmt, size_t len,
|
|
bool reassoc)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_supported_band *sband;
|
|
struct sta_info *sta;
|
|
u32 rates, basic_rates;
|
|
u16 capab_info, status_code, aid;
|
|
struct ieee802_11_elems elems;
|
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
|
|
u8 *pos;
|
|
u32 changed = 0;
|
|
int i, j;
|
|
bool have_higher_than_11mbit = false, newsta = false;
|
|
u16 ap_ht_cap_flags;
|
|
|
|
/*
|
|
* AssocResp and ReassocResp have identical structure, so process both
|
|
* of them in this function.
|
|
*/
|
|
|
|
if (len < 24 + 6)
|
|
return RX_MGMT_NONE;
|
|
|
|
if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
|
|
return RX_MGMT_NONE;
|
|
|
|
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);
|
|
|
|
printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
|
|
"status=%d aid=%d)\n",
|
|
sdata->dev->name, 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;
|
|
printk(KERN_DEBUG "%s: AP rejected association temporarily; "
|
|
"comeback duration %u TU (%u ms)\n",
|
|
sdata->dev->name, tu, ms);
|
|
wk->timeout = jiffies + msecs_to_jiffies(ms);
|
|
if (ms > IEEE80211_ASSOC_TIMEOUT)
|
|
run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
|
|
return RX_MGMT_NONE;
|
|
}
|
|
|
|
if (status_code != WLAN_STATUS_SUCCESS) {
|
|
printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
|
|
sdata->dev->name, status_code);
|
|
list_del(&wk->list);
|
|
kfree(wk);
|
|
return RX_MGMT_CFG80211_ASSOC;
|
|
}
|
|
|
|
if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
|
|
printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
|
|
"set\n", sdata->dev->name, aid);
|
|
aid &= ~(BIT(15) | BIT(14));
|
|
|
|
if (!elems.supp_rates) {
|
|
printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
|
|
sdata->dev->name);
|
|
return RX_MGMT_NONE;
|
|
}
|
|
|
|
printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
|
|
ifmgd->aid = aid;
|
|
|
|
rcu_read_lock();
|
|
|
|
/* Add STA entry for the AP */
|
|
sta = sta_info_get(local, wk->bss->cbss.bssid);
|
|
if (!sta) {
|
|
newsta = true;
|
|
|
|
rcu_read_unlock();
|
|
|
|
sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
|
|
if (!sta) {
|
|
printk(KERN_DEBUG "%s: failed to alloc STA entry for"
|
|
" the AP\n", sdata->dev->name);
|
|
return RX_MGMT_NONE;
|
|
}
|
|
|
|
set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
|
|
WLAN_STA_ASSOC_AP);
|
|
if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
|
|
set_sta_flags(sta, WLAN_STA_AUTHORIZED);
|
|
|
|
rcu_read_lock();
|
|
}
|
|
|
|
rates = 0;
|
|
basic_rates = 0;
|
|
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
|
|
|
for (i = 0; i < elems.supp_rates_len; i++) {
|
|
int rate = (elems.supp_rates[i] & 0x7f) * 5;
|
|
bool is_basic = !!(elems.supp_rates[i] & 0x80);
|
|
|
|
if (rate > 110)
|
|
have_higher_than_11mbit = true;
|
|
|
|
for (j = 0; j < sband->n_bitrates; j++) {
|
|
if (sband->bitrates[j].bitrate == rate) {
|
|
rates |= BIT(j);
|
|
if (is_basic)
|
|
basic_rates |= BIT(j);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < elems.ext_supp_rates_len; i++) {
|
|
int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
|
|
bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
|
|
|
|
if (rate > 110)
|
|
have_higher_than_11mbit = true;
|
|
|
|
for (j = 0; j < sband->n_bitrates; j++) {
|
|
if (sband->bitrates[j].bitrate == rate) {
|
|
rates |= BIT(j);
|
|
if (is_basic)
|
|
basic_rates |= BIT(j);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
|
|
sdata->vif.bss_conf.basic_rates = basic_rates;
|
|
|
|
/* cf. IEEE 802.11 9.2.12 */
|
|
if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
|
|
have_higher_than_11mbit)
|
|
sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
|
|
else
|
|
sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
|
|
|
|
if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
|
|
ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
|
|
elems.ht_cap_elem, &sta->sta.ht_cap);
|
|
|
|
ap_ht_cap_flags = sta->sta.ht_cap.cap;
|
|
|
|
rate_control_rate_init(sta);
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
|
|
set_sta_flags(sta, WLAN_STA_MFP);
|
|
|
|
if (elems.wmm_param)
|
|
set_sta_flags(sta, WLAN_STA_WME);
|
|
|
|
if (newsta) {
|
|
int err = sta_info_insert(sta);
|
|
if (err) {
|
|
printk(KERN_DEBUG "%s: failed to insert STA entry for"
|
|
" the AP (error %d)\n", sdata->dev->name, err);
|
|
rcu_read_unlock();
|
|
return RX_MGMT_NONE;
|
|
}
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
if (elems.wmm_param)
|
|
ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
|
|
elems.wmm_param_len);
|
|
else
|
|
ieee80211_set_wmm_default(sdata);
|
|
|
|
if (elems.ht_info_elem && elems.wmm_param &&
|
|
(ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
|
|
!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
|
|
changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
|
|
wk->bss->cbss.bssid,
|
|
ap_ht_cap_flags);
|
|
|
|
/* delete work item -- must be before set_associated for PS */
|
|
list_del(&wk->list);
|
|
|
|
/* set AID and assoc capability,
|
|
* ieee80211_set_associated() will tell the driver */
|
|
bss_conf->aid = aid;
|
|
bss_conf->assoc_capability = capab_info;
|
|
/* this will take ownership of wk */
|
|
ieee80211_set_associated(sdata, wk, changed);
|
|
|
|
/*
|
|
* 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);
|
|
mod_beacon_timer(sdata);
|
|
|
|
return RX_MGMT_CFG80211_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,
|
|
bool beacon)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
int freq;
|
|
struct ieee80211_bss *bss;
|
|
struct ieee80211_channel *channel;
|
|
|
|
if (elems->ds_params && elems->ds_params_len == 1)
|
|
freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
|
|
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, beacon);
|
|
if (bss)
|
|
ieee80211_rx_bss_put(local, bss);
|
|
|
|
if (!sdata->u.mgd.associated)
|
|
return;
|
|
|
|
if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
|
|
(memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
|
|
ETH_ALEN) == 0)) {
|
|
struct ieee80211_channel_sw_ie *sw_elem =
|
|
(struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
|
|
ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
|
|
}
|
|
}
|
|
|
|
|
|
static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgd_work *wk,
|
|
struct ieee80211_mgmt *mgmt, size_t len,
|
|
struct ieee80211_rx_status *rx_status)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd;
|
|
size_t baselen;
|
|
struct ieee802_11_elems elems;
|
|
|
|
ifmgd = &sdata->u.mgd;
|
|
|
|
ASSERT_MGD_MTX(ifmgd);
|
|
|
|
if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
|
|
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, false);
|
|
|
|
/* direct probe may be part of the association flow */
|
|
if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
|
|
printk(KERN_DEBUG "%s direct probe responded\n",
|
|
sdata->dev->name);
|
|
wk->tries = 0;
|
|
wk->state = IEEE80211_MGD_STATE_AUTH;
|
|
WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
|
|
}
|
|
|
|
if (ifmgd->associated &&
|
|
memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
|
|
ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
|
|
IEEE80211_STA_CONNECTION_POLL)) {
|
|
ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
|
|
IEEE80211_STA_BEACON_POLL);
|
|
mutex_lock(&sdata->local->iflist_mtx);
|
|
ieee80211_recalc_ps(sdata->local, -1);
|
|
mutex_unlock(&sdata->local->iflist_mtx);
|
|
/*
|
|
* 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.
|
|
*/
|
|
mod_beacon_timer(sdata);
|
|
mod_timer(&ifmgd->conn_mon_timer,
|
|
round_jiffies_up(jiffies +
|
|
IEEE80211_CONNECTION_IDLE_TIME));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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_INFORMATION);
|
|
|
|
static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len,
|
|
struct ieee80211_rx_status *rx_status)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
size_t baselen;
|
|
struct ieee802_11_elems elems;
|
|
struct ieee80211_local *local = sdata->local;
|
|
u32 changed = 0;
|
|
bool erp_valid, directed_tim = false;
|
|
u8 erp_value = 0;
|
|
u32 ncrc;
|
|
u8 *bssid;
|
|
|
|
ASSERT_MGD_MTX(ifmgd);
|
|
|
|
/* Process beacon from the current BSS */
|
|
baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
|
|
if (baselen > len)
|
|
return;
|
|
|
|
if (rx_status->freq != local->hw.conf.channel->center_freq)
|
|
return;
|
|
|
|
/*
|
|
* We might have received a number of frames, among them a
|
|
* disassoc frame and a beacon...
|
|
*/
|
|
if (!ifmgd->associated)
|
|
return;
|
|
|
|
bssid = ifmgd->associated->cbss.bssid;
|
|
|
|
/*
|
|
* And in theory even frames from a different AP we were just
|
|
* associated to a split-second ago!
|
|
*/
|
|
if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
|
|
return;
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
if (net_ratelimit()) {
|
|
printk(KERN_DEBUG "%s: cancelling probereq poll due "
|
|
"to a received beacon\n", sdata->dev->name);
|
|
}
|
|
#endif
|
|
ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
|
|
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.
|
|
*/
|
|
mod_beacon_timer(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)
|
|
directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
|
|
ifmgd->aid);
|
|
|
|
if (ncrc != ifmgd->beacon_crc) {
|
|
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
|
|
true);
|
|
|
|
ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
|
|
elems.wmm_param_len);
|
|
}
|
|
|
|
if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
|
|
if (directed_tim) {
|
|
if (local->hw.conf.dynamic_ps_timeout > 0) {
|
|
local->hw.conf.flags &= ~IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local,
|
|
IEEE80211_CONF_CHANGE_PS);
|
|
ieee80211_send_nullfunc(local, sdata, 0);
|
|
} else {
|
|
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 (ncrc == ifmgd->beacon_crc)
|
|
return;
|
|
ifmgd->beacon_crc = ncrc;
|
|
|
|
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);
|
|
|
|
|
|
if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
|
|
!(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
|
|
struct sta_info *sta;
|
|
struct ieee80211_supported_band *sband;
|
|
u16 ap_ht_cap_flags;
|
|
|
|
rcu_read_lock();
|
|
|
|
sta = sta_info_get(local, bssid);
|
|
if (WARN_ON(!sta)) {
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
|
|
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
|
|
|
ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
|
|
elems.ht_cap_elem, &sta->sta.ht_cap);
|
|
|
|
ap_ht_cap_flags = sta->sta.ht_cap.cap;
|
|
|
|
rcu_read_unlock();
|
|
|
|
changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
|
|
bssid, ap_ht_cap_flags);
|
|
}
|
|
|
|
/* Note: country IE parsing is done for us by cfg80211 */
|
|
if (elems.country_elem) {
|
|
/* TODO: IBSS also needs this */
|
|
if (elems.pwr_constr_elem)
|
|
ieee80211_handle_pwr_constr(sdata,
|
|
le16_to_cpu(mgmt->u.probe_resp.capab_info),
|
|
elems.pwr_constr_elem,
|
|
elems.pwr_constr_elem_len);
|
|
}
|
|
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
}
|
|
|
|
ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_mgmt *mgmt;
|
|
u16 fc;
|
|
|
|
if (skb->len < 24)
|
|
return RX_DROP_MONITOR;
|
|
|
|
mgmt = (struct ieee80211_mgmt *) skb->data;
|
|
fc = le16_to_cpu(mgmt->frame_control);
|
|
|
|
switch (fc & IEEE80211_FCTL_STYPE) {
|
|
case IEEE80211_STYPE_PROBE_REQ:
|
|
case IEEE80211_STYPE_PROBE_RESP:
|
|
case IEEE80211_STYPE_BEACON:
|
|
case IEEE80211_STYPE_AUTH:
|
|
case IEEE80211_STYPE_ASSOC_RESP:
|
|
case IEEE80211_STYPE_REASSOC_RESP:
|
|
case IEEE80211_STYPE_DEAUTH:
|
|
case IEEE80211_STYPE_DISASSOC:
|
|
case IEEE80211_STYPE_ACTION:
|
|
skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
|
|
ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
|
|
return RX_QUEUED;
|
|
}
|
|
|
|
return RX_DROP_MONITOR;
|
|
}
|
|
|
|
static 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 ieee80211_mgd_work *wk;
|
|
enum rx_mgmt_action rma = RX_MGMT_NONE;
|
|
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);
|
|
|
|
if (ifmgd->associated &&
|
|
memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
|
|
ETH_ALEN) == 0) {
|
|
switch (fc & IEEE80211_FCTL_STYPE) {
|
|
case IEEE80211_STYPE_BEACON:
|
|
ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
|
|
rx_status);
|
|
break;
|
|
case IEEE80211_STYPE_PROBE_RESP:
|
|
ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
|
|
skb->len, rx_status);
|
|
break;
|
|
case IEEE80211_STYPE_DEAUTH:
|
|
rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
|
|
mgmt, skb->len);
|
|
break;
|
|
case IEEE80211_STYPE_DISASSOC:
|
|
rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
|
|
break;
|
|
case IEEE80211_STYPE_ACTION:
|
|
/* XXX: differentiate, can only happen for CSA now! */
|
|
ieee80211_sta_process_chanswitch(sdata,
|
|
&mgmt->u.action.u.chan_switch.sw_elem,
|
|
ifmgd->associated);
|
|
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,
|
|
NULL);
|
|
break;
|
|
case RX_MGMT_CFG80211_DISASSOC:
|
|
cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len,
|
|
NULL);
|
|
break;
|
|
default:
|
|
WARN(1, "unexpected: %d", rma);
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
list_for_each_entry(wk, &ifmgd->work_list, list) {
|
|
if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
|
|
continue;
|
|
|
|
switch (fc & IEEE80211_FCTL_STYPE) {
|
|
case IEEE80211_STYPE_PROBE_RESP:
|
|
ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
|
|
rx_status);
|
|
break;
|
|
case IEEE80211_STYPE_AUTH:
|
|
rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
|
|
break;
|
|
case IEEE80211_STYPE_ASSOC_RESP:
|
|
rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
|
|
skb->len, false);
|
|
break;
|
|
case IEEE80211_STYPE_REASSOC_RESP:
|
|
rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
|
|
skb->len, true);
|
|
break;
|
|
case IEEE80211_STYPE_DEAUTH:
|
|
rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
|
|
skb->len);
|
|
break;
|
|
}
|
|
/*
|
|
* We've processed this frame for that work, so it can't
|
|
* belong to another work struct.
|
|
* NB: this is also required for correctness because the
|
|
* called functions can free 'wk', and for 'rma'!
|
|
*/
|
|
break;
|
|
}
|
|
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
switch (rma) {
|
|
case RX_MGMT_NONE:
|
|
/* no action */
|
|
break;
|
|
case RX_MGMT_CFG80211_AUTH:
|
|
cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
|
|
break;
|
|
case RX_MGMT_CFG80211_ASSOC:
|
|
cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
|
|
break;
|
|
case RX_MGMT_CFG80211_DEAUTH:
|
|
cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, NULL);
|
|
break;
|
|
default:
|
|
WARN(1, "unexpected: %d", rma);
|
|
}
|
|
|
|
out:
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
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, &ifmgd->work);
|
|
}
|
|
|
|
static void ieee80211_sta_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_managed *ifmgd;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_mgd_work *wk, *tmp;
|
|
LIST_HEAD(free_work);
|
|
enum rx_mgmt_action rma;
|
|
bool anybusy = false;
|
|
|
|
if (!netif_running(sdata->dev))
|
|
return;
|
|
|
|
if (local->scanning)
|
|
return;
|
|
|
|
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
|
|
return;
|
|
|
|
/*
|
|
* ieee80211_queue_work() should have picked up most cases,
|
|
* here we'll pick the the rest.
|
|
*/
|
|
if (WARN(local->suspended, "STA MLME work scheduled while "
|
|
"going to suspend\n"))
|
|
return;
|
|
|
|
ifmgd = &sdata->u.mgd;
|
|
|
|
/* first process frames to avoid timing out while a frame is pending */
|
|
while ((skb = skb_dequeue(&ifmgd->skb_queue)))
|
|
ieee80211_sta_rx_queued_mgmt(sdata, skb);
|
|
|
|
/* then process the rest of the work */
|
|
mutex_lock(&ifmgd->mtx);
|
|
|
|
if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
|
|
IEEE80211_STA_CONNECTION_POLL) &&
|
|
ifmgd->associated) {
|
|
u8 bssid[ETH_ALEN];
|
|
|
|
memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
|
|
if (time_is_after_jiffies(ifmgd->probe_timeout))
|
|
run_again(ifmgd, ifmgd->probe_timeout);
|
|
|
|
else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
printk(KERN_DEBUG "No probe response from AP %pM"
|
|
" after %dms, try %d\n", bssid,
|
|
(1000 * IEEE80211_PROBE_WAIT)/HZ,
|
|
ifmgd->probe_send_count);
|
|
#endif
|
|
ieee80211_mgd_probe_ap_send(sdata);
|
|
} else {
|
|
/*
|
|
* We actually lost the connection ... or did we?
|
|
* Let's make sure!
|
|
*/
|
|
ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
|
|
IEEE80211_STA_BEACON_POLL);
|
|
printk(KERN_DEBUG "No probe response from AP %pM"
|
|
" after %dms, disconnecting.\n",
|
|
bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
|
|
ieee80211_set_disassoc(sdata, true);
|
|
mutex_unlock(&ifmgd->mtx);
|
|
/*
|
|
* must be outside lock due to cfg80211,
|
|
* but that's not a problem.
|
|
*/
|
|
ieee80211_send_deauth_disassoc(sdata, bssid,
|
|
IEEE80211_STYPE_DEAUTH,
|
|
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
|
|
NULL);
|
|
mutex_lock(&ifmgd->mtx);
|
|
}
|
|
}
|
|
|
|
|
|
ieee80211_recalc_idle(local);
|
|
|
|
list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
|
|
if (time_is_after_jiffies(wk->timeout)) {
|
|
/*
|
|
* This work item isn't supposed to be worked on
|
|
* right now, but take care to adjust the timer
|
|
* properly.
|
|
*/
|
|
run_again(ifmgd, wk->timeout);
|
|
continue;
|
|
}
|
|
|
|
switch (wk->state) {
|
|
default:
|
|
WARN_ON(1);
|
|
/* fall through */
|
|
case IEEE80211_MGD_STATE_IDLE:
|
|
/* nothing */
|
|
rma = RX_MGMT_NONE;
|
|
break;
|
|
case IEEE80211_MGD_STATE_PROBE:
|
|
rma = ieee80211_direct_probe(sdata, wk);
|
|
break;
|
|
case IEEE80211_MGD_STATE_AUTH:
|
|
rma = ieee80211_authenticate(sdata, wk);
|
|
break;
|
|
case IEEE80211_MGD_STATE_ASSOC:
|
|
rma = ieee80211_associate(sdata, wk);
|
|
break;
|
|
}
|
|
|
|
switch (rma) {
|
|
case RX_MGMT_NONE:
|
|
/* no action required */
|
|
break;
|
|
case RX_MGMT_CFG80211_AUTH_TO:
|
|
case RX_MGMT_CFG80211_ASSOC_TO:
|
|
list_del(&wk->list);
|
|
list_add(&wk->list, &free_work);
|
|
wk->tries = rma; /* small abuse but only local */
|
|
break;
|
|
default:
|
|
WARN(1, "unexpected: %d", rma);
|
|
}
|
|
}
|
|
|
|
list_for_each_entry(wk, &ifmgd->work_list, list) {
|
|
if (wk->state != IEEE80211_MGD_STATE_IDLE) {
|
|
anybusy = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!anybusy &&
|
|
test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
|
|
ieee80211_queue_delayed_work(&local->hw,
|
|
&local->scan_work,
|
|
round_jiffies_relative(0));
|
|
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
list_for_each_entry_safe(wk, tmp, &free_work, list) {
|
|
switch (wk->tries) {
|
|
case RX_MGMT_CFG80211_AUTH_TO:
|
|
cfg80211_send_auth_timeout(sdata->dev,
|
|
wk->bss->cbss.bssid);
|
|
break;
|
|
case RX_MGMT_CFG80211_ASSOC_TO:
|
|
cfg80211_send_assoc_timeout(sdata->dev,
|
|
wk->bss->cbss.bssid);
|
|
break;
|
|
default:
|
|
WARN(1, "unexpected: %d", wk->tries);
|
|
}
|
|
|
|
list_del(&wk->list);
|
|
kfree(wk);
|
|
}
|
|
|
|
ieee80211_recalc_idle(local);
|
|
}
|
|
|
|
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;
|
|
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_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)
|
|
{
|
|
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
|
|
sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
|
|
IEEE80211_STA_CONNECTION_POLL);
|
|
|
|
/* let's probe the connection once */
|
|
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->u.mgd.work);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
/*
|
|
* 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->work);
|
|
cancel_work_sync(&ifmgd->beacon_loss_work);
|
|
if (del_timer_sync(&ifmgd->timer))
|
|
set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
|
|
|
|
cancel_work_sync(&ifmgd->chswitch_work);
|
|
if (del_timer_sync(&ifmgd->chswitch_timer))
|
|
set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
|
|
|
|
cancel_work_sync(&ifmgd->monitor_work);
|
|
/* these will just be re-established on connection */
|
|
del_timer_sync(&ifmgd->conn_mon_timer);
|
|
del_timer_sync(&ifmgd->bcn_mon_timer);
|
|
}
|
|
|
|
void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
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);
|
|
}
|
|
#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->work, ieee80211_sta_work);
|
|
INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
|
|
INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
|
|
INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_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);
|
|
skb_queue_head_init(&ifmgd->skb_queue);
|
|
|
|
INIT_LIST_HEAD(&ifmgd->work_list);
|
|
|
|
ifmgd->capab = WLAN_CAPABILITY_ESS;
|
|
ifmgd->flags = 0;
|
|
if (sdata->local->hw.queues >= 4)
|
|
ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
|
|
|
|
mutex_init(&ifmgd->mtx);
|
|
}
|
|
|
|
/* scan finished notification */
|
|
void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = local->scan_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;
|
|
}
|
|
|
|
/* config hooks */
|
|
int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_auth_request *req)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
const u8 *ssid;
|
|
struct ieee80211_mgd_work *wk;
|
|
u16 auth_alg;
|
|
|
|
switch (req->auth_type) {
|
|
case NL80211_AUTHTYPE_OPEN_SYSTEM:
|
|
auth_alg = WLAN_AUTH_OPEN;
|
|
break;
|
|
case NL80211_AUTHTYPE_SHARED_KEY:
|
|
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;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
|
|
if (!wk)
|
|
return -ENOMEM;
|
|
|
|
wk->bss = (void *)req->bss;
|
|
|
|
if (req->ie && req->ie_len) {
|
|
memcpy(wk->ie, req->ie, req->ie_len);
|
|
wk->ie_len = req->ie_len;
|
|
}
|
|
|
|
if (req->key && req->key_len) {
|
|
wk->key_len = req->key_len;
|
|
wk->key_idx = req->key_idx;
|
|
memcpy(wk->key, req->key, req->key_len);
|
|
}
|
|
|
|
ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
|
|
memcpy(wk->ssid, ssid + 2, ssid[1]);
|
|
wk->ssid_len = ssid[1];
|
|
|
|
wk->state = IEEE80211_MGD_STATE_PROBE;
|
|
wk->auth_alg = auth_alg;
|
|
wk->timeout = jiffies; /* run right away */
|
|
|
|
/*
|
|
* XXX: if still associated need to tell AP that we're going
|
|
* to sleep and then change channel etc.
|
|
*/
|
|
sdata->local->oper_channel = req->bss->channel;
|
|
ieee80211_hw_config(sdata->local, 0);
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
list_add(&wk->list, &sdata->u.mgd.work_list);
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_assoc_request *req)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_mgd_work *wk, *found = NULL;
|
|
int i, err;
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
|
|
list_for_each_entry(wk, &ifmgd->work_list, list) {
|
|
if (&wk->bss->cbss == req->bss &&
|
|
wk->state == IEEE80211_MGD_STATE_IDLE) {
|
|
found = wk;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
err = -ENOLINK;
|
|
goto out;
|
|
}
|
|
|
|
list_del(&found->list);
|
|
|
|
wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
|
|
if (!wk) {
|
|
list_add(&found->list, &ifmgd->work_list);
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
list_add(&wk->list, &ifmgd->work_list);
|
|
|
|
ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
|
|
|
|
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_11N;
|
|
|
|
sdata->local->oper_channel = req->bss->channel;
|
|
ieee80211_hw_config(sdata->local, 0);
|
|
|
|
if (req->ie && req->ie_len) {
|
|
memcpy(wk->ie, req->ie, req->ie_len);
|
|
wk->ie_len = req->ie_len;
|
|
} else
|
|
wk->ie_len = 0;
|
|
|
|
if (req->prev_bssid)
|
|
memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
|
|
|
|
wk->state = IEEE80211_MGD_STATE_ASSOC;
|
|
wk->tries = 0;
|
|
wk->timeout = jiffies; /* run right away */
|
|
|
|
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;
|
|
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
|
|
|
|
err = 0;
|
|
|
|
out:
|
|
mutex_unlock(&ifmgd->mtx);
|
|
return err;
|
|
}
|
|
|
|
int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_deauth_request *req,
|
|
void *cookie)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_mgd_work *wk;
|
|
const u8 *bssid = NULL;
|
|
|
|
printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
|
|
sdata->dev->name, req->reason_code);
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
|
|
if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
|
|
bssid = req->bss->bssid;
|
|
ieee80211_set_disassoc(sdata, true);
|
|
} else list_for_each_entry(wk, &ifmgd->work_list, list) {
|
|
if (&wk->bss->cbss == req->bss) {
|
|
bssid = req->bss->bssid;
|
|
list_del(&wk->list);
|
|
kfree(wk);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* cfg80211 should catch this ... but it's racy since
|
|
* we can receive a deauth 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 (!bssid) {
|
|
mutex_unlock(&ifmgd->mtx);
|
|
return -ENOLINK;
|
|
}
|
|
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
ieee80211_send_deauth_disassoc(sdata, bssid,
|
|
IEEE80211_STYPE_DEAUTH, req->reason_code,
|
|
cookie);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_disassoc_request *req,
|
|
void *cookie)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
|
|
sdata->dev->name, req->reason_code);
|
|
|
|
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->cbss != req->bss) {
|
|
mutex_unlock(&ifmgd->mtx);
|
|
return -ENOLINK;
|
|
}
|
|
|
|
ieee80211_set_disassoc(sdata, false);
|
|
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
|
|
IEEE80211_STYPE_DISASSOC, req->reason_code,
|
|
cookie);
|
|
return 0;
|
|
}
|