2856 lines
79 KiB
C
2856 lines
79 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.h>
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#include <linux/crc32.h>
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#include <linux/slab.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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static int max_nullfunc_tries = 2;
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module_param(max_nullfunc_tries, int, 0644);
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MODULE_PARM_DESC(max_nullfunc_tries,
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"Maximum nullfunc tx tries before disconnecting (reason 4).");
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static int max_probe_tries = 5;
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module_param(max_probe_tries, int, 0644);
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MODULE_PARM_DESC(max_probe_tries,
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"Maximum probe tries before disconnecting (reason 4).");
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/*
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* Beacon loss timeout is calculated as N frames times the
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* advertised beacon interval. This may need to be somewhat
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* higher than what hardware might detect to account for
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* delays in the host processing frames. But since we also
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* probe on beacon miss before declaring the connection lost
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* default to what we want.
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*/
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#define IEEE80211_BEACON_LOSS_COUNT 7
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/*
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* Time the connection can be idle before we probe
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* it to see if we can still talk to the AP.
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*/
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#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
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/*
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* Time we wait for a probe response after sending
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* a probe request because of beacon loss or for
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* checking the connection still works.
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*/
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static int probe_wait_ms = 500;
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module_param(probe_wait_ms, int, 0644);
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MODULE_PARM_DESC(probe_wait_ms,
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"Maximum time(ms) to wait for probe response"
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" before disconnecting (reason 4).");
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/*
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* Weight given to the latest Beacon frame when calculating average signal
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* strength for Beacon frames received in the current BSS. This must be
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* between 1 and 15.
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*/
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#define IEEE80211_SIGNAL_AVE_WEIGHT 3
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/*
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* How many Beacon frames need to have been used in average signal strength
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* before starting to indicate signal change events.
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*/
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#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
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#define TMR_RUNNING_TIMER 0
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#define TMR_RUNNING_CHANSW 1
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/*
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* All cfg80211 functions have to be called outside a locked
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* section so that they can acquire a lock themselves... This
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* is much simpler than queuing up things in cfg80211, but we
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* do need some indirection for that here.
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*/
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enum rx_mgmt_action {
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/* no action required */
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RX_MGMT_NONE,
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/* caller must call cfg80211_send_deauth() */
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RX_MGMT_CFG80211_DEAUTH,
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/* caller must call cfg80211_send_disassoc() */
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RX_MGMT_CFG80211_DISASSOC,
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};
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/* utils */
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static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
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{
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lockdep_assert_held(&ifmgd->mtx);
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}
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/*
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* We can have multiple work items (and connection probing)
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* scheduling this timer, but we need to take care to only
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* reschedule it when it should fire _earlier_ than it was
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* asked for before, or if it's not pending right now. This
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* function ensures that. Note that it then is required to
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* run this function for all timeouts after the first one
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* has happened -- the work that runs from this timer will
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* do that.
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*/
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static void run_again(struct ieee80211_if_managed *ifmgd,
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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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void ieee80211_sta_reset_beacon_monitor(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 + sdata->u.mgd.beacon_timeout));
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}
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void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
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{
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struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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if (unlikely(!sdata->u.mgd.associated))
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return;
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if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
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return;
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mod_timer(&sdata->u.mgd.conn_mon_timer,
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round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
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ifmgd->probe_send_count = 0;
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}
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static int ecw2cw(int ecw)
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{
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return (1 << ecw) - 1;
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}
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/*
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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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bool beacon_htcap_ie)
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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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int hti_cfreq;
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u16 ht_opmode;
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bool enable_ht = true;
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enum nl80211_channel_type prev_chantype;
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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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prev_chantype = sdata->vif.bss_conf.channel_type;
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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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if (enable_ht) {
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hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
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sband->band);
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/* check that channel matches the right operating channel */
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if (local->hw.conf.channel->center_freq != hti_cfreq) {
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/* Some APs mess this up, evidently.
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* Netgear WNDR3700 sometimes reports 4 higher than
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* the actual channel, for instance.
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*/
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printk(KERN_DEBUG
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"%s: Wrong control channel in association"
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" response: configured center-freq: %d"
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" hti-cfreq: %d hti->control_chan: %d"
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" band: %d. Disabling HT.\n",
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sdata->name,
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local->hw.conf.channel->center_freq,
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hti_cfreq, hti->control_chan,
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sband->band);
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enable_ht = false;
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}
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}
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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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if (local->tmp_channel)
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local->tmp_channel_type = channel_type;
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if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
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/* can only fail due to HT40+/- mismatch */
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channel_type = NL80211_CHAN_HT20;
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WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
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}
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if (beacon_htcap_ie && (prev_chantype != channel_type)) {
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/*
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* Whenever the AP announces the HT mode change that can be
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* 40MHz intolerant or etc., it would be safer to stop tx
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* queues before doing hw config to avoid buffer overflow.
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*/
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ieee80211_stop_queues_by_reason(&sdata->local->hw,
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IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
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/* flush out all packets */
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synchronize_net();
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drv_flush(local, false);
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}
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/* channel_type change automatically detected */
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ieee80211_hw_config(local, 0);
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if (prev_chantype != channel_type) {
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rcu_read_lock();
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sta = sta_info_get(sdata, 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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channel_type);
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rcu_read_unlock();
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if (beacon_htcap_ie)
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ieee80211_wake_queues_by_reason(&sdata->local->hw,
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IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
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}
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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 != enable_ht ||
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sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
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prev_chantype != channel_type) {
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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 = enable_ht;
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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_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, bool send_frame)
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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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return;
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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);
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memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
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memcpy(mgmt->bssid, bssid, ETH_ALEN);
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mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
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skb_put(skb, 2);
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/* u.deauth.reason_code == u.disassoc.reason_code */
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mgmt->u.deauth.reason_code = cpu_to_le16(reason);
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if (stype == IEEE80211_STYPE_DEAUTH)
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if (cookie)
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__cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
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else
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cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
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else
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if (cookie)
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__cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
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else
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cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
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if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
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IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
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if (send_frame)
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ieee80211_tx_skb(sdata, skb);
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else
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kfree_skb(skb);
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}
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void ieee80211_send_pspoll(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata)
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{
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struct ieee80211_pspoll *pspoll;
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struct sk_buff *skb;
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skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
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if (!skb)
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return;
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pspoll = (struct ieee80211_pspoll *) skb->data;
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pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
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IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
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ieee80211_tx_skb(sdata, skb);
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}
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void ieee80211_send_nullfunc(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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int powersave)
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{
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struct sk_buff *skb;
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struct ieee80211_hdr_3addr *nullfunc;
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struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
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if (!skb)
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return;
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nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
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if (powersave)
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nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
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IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
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if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
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IEEE80211_STA_CONNECTION_POLL))
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IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
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ieee80211_tx_skb(sdata, skb);
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}
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static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata)
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{
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struct sk_buff *skb;
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struct ieee80211_hdr *nullfunc;
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__le16 fc;
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if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
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return;
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skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
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if (!skb)
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return;
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skb_reserve(skb, local->hw.extra_tx_headroom);
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nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
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memset(nullfunc, 0, 30);
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fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
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IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
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nullfunc->frame_control = fc;
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memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
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memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
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memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
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memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
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IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
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ieee80211_tx_skb(sdata, skb);
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}
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|
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/* spectrum management related things */
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static void ieee80211_chswitch_work(struct work_struct *work)
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{
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struct ieee80211_sub_if_data *sdata =
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container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
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struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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|
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if (!ieee80211_sdata_running(sdata))
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return;
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|
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mutex_lock(&ifmgd->mtx);
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if (!ifmgd->associated)
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goto out;
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sdata->local->oper_channel = sdata->local->csa_channel;
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if (!sdata->local->ops->channel_switch) {
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/* call "hw_config" only if doing sw channel switch */
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ieee80211_hw_config(sdata->local,
|
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IEEE80211_CONF_CHANGE_CHANNEL);
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} else {
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/* update the device channel directly */
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sdata->local->hw.conf.channel = sdata->local->oper_channel;
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}
|
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|
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/* XXX: shouldn't really modify cfg80211-owned data! */
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ifmgd->associated->channel = sdata->local->oper_channel;
|
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|
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ieee80211_wake_queues_by_reason(&sdata->local->hw,
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IEEE80211_QUEUE_STOP_REASON_CSA);
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out:
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ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
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mutex_unlock(&ifmgd->mtx);
|
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}
|
|
|
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void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
|
|
{
|
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struct ieee80211_sub_if_data *sdata;
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struct ieee80211_if_managed *ifmgd;
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|
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sdata = vif_to_sdata(vif);
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ifmgd = &sdata->u.mgd;
|
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|
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trace_api_chswitch_done(sdata, success);
|
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if (!success) {
|
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/*
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* If the channel switch was not successful, stay
|
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* around on the old channel. We currently lack
|
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* good handling of this situation, possibly we
|
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* should just drop the association.
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*/
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sdata->local->csa_channel = sdata->local->oper_channel;
|
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}
|
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|
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ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
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}
|
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EXPORT_SYMBOL(ieee80211_chswitch_done);
|
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|
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static void ieee80211_chswitch_timer(unsigned long data)
|
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{
|
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struct ieee80211_sub_if_data *sdata =
|
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(struct ieee80211_sub_if_data *) data;
|
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struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
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|
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if (sdata->local->quiescing) {
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set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
|
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return;
|
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}
|
|
|
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ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
|
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}
|
|
|
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void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_channel_sw_ie *sw_elem,
|
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struct ieee80211_bss *bss,
|
|
u64 timestamp)
|
|
{
|
|
struct cfg80211_bss *cbss =
|
|
container_of((void *)bss, struct cfg80211_bss, priv);
|
|
struct ieee80211_channel *new_ch;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
|
|
cbss->channel->band);
|
|
|
|
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 (sdata->local->ops->channel_switch) {
|
|
/* use driver's channel switch callback */
|
|
struct ieee80211_channel_switch ch_switch;
|
|
memset(&ch_switch, 0, sizeof(ch_switch));
|
|
ch_switch.timestamp = timestamp;
|
|
if (sw_elem->mode) {
|
|
ch_switch.block_tx = true;
|
|
ieee80211_stop_queues_by_reason(&sdata->local->hw,
|
|
IEEE80211_QUEUE_STOP_REASON_CSA);
|
|
}
|
|
ch_switch.channel = new_ch;
|
|
ch_switch.count = sw_elem->count;
|
|
ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
|
|
drv_channel_switch(sdata->local, &ch_switch);
|
|
return;
|
|
}
|
|
|
|
/* channel switch handled in software */
|
|
if (sw_elem->count <= 1) {
|
|
ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
|
|
} else {
|
|
if (sw_elem->mode)
|
|
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 *
|
|
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);
|
|
}
|
|
}
|
|
|
|
void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_conf *conf = &local->hw.conf;
|
|
|
|
WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
|
|
!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
|
|
(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
|
|
|
|
local->disable_dynamic_ps = false;
|
|
conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
|
|
|
|
void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_conf *conf = &local->hw.conf;
|
|
|
|
WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
|
|
!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
|
|
(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
|
|
|
|
local->disable_dynamic_ps = true;
|
|
conf->dynamic_ps_timeout = 0;
|
|
del_timer_sync(&local->dynamic_ps_timer);
|
|
ieee80211_queue_work(&local->hw,
|
|
&local->dynamic_ps_enable_work);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
|
|
|
|
/* powersave */
|
|
static void ieee80211_enable_ps(struct ieee80211_local *local,
|
|
struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_conf *conf = &local->hw.conf;
|
|
|
|
/*
|
|
* If we are scanning right now then the parameters will
|
|
* take effect when scan finishes.
|
|
*/
|
|
if (local->scanning)
|
|
return;
|
|
|
|
if (conf->dynamic_ps_timeout > 0 &&
|
|
!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
|
|
mod_timer(&local->dynamic_ps_timer, jiffies +
|
|
msecs_to_jiffies(conf->dynamic_ps_timeout));
|
|
} else {
|
|
if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
|
|
ieee80211_send_nullfunc(local, sdata, 1);
|
|
|
|
if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
|
|
(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
|
|
return;
|
|
|
|
conf->flags |= IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
|
}
|
|
}
|
|
|
|
static void ieee80211_change_ps(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_conf *conf = &local->hw.conf;
|
|
|
|
if (local->ps_sdata) {
|
|
ieee80211_enable_ps(local, local->ps_sdata);
|
|
} else if (conf->flags & IEEE80211_CONF_PS) {
|
|
conf->flags &= ~IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
|
del_timer_sync(&local->dynamic_ps_timer);
|
|
cancel_work_sync(&local->dynamic_ps_enable_work);
|
|
}
|
|
}
|
|
|
|
static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *mgd = &sdata->u.mgd;
|
|
struct sta_info *sta = NULL;
|
|
bool authorized = false;
|
|
|
|
if (!mgd->powersave)
|
|
return false;
|
|
|
|
if (mgd->broken_ap)
|
|
return false;
|
|
|
|
if (!mgd->associated)
|
|
return false;
|
|
|
|
if (!mgd->associated->beacon_ies)
|
|
return false;
|
|
|
|
if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
|
|
IEEE80211_STA_CONNECTION_POLL))
|
|
return false;
|
|
|
|
rcu_read_lock();
|
|
sta = sta_info_get(sdata, mgd->bssid);
|
|
if (sta)
|
|
authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
|
|
rcu_read_unlock();
|
|
|
|
return authorized;
|
|
}
|
|
|
|
/* need to hold RTNL or interface lock */
|
|
void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata, *found = NULL;
|
|
int count = 0;
|
|
int timeout;
|
|
|
|
if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
|
|
local->ps_sdata = NULL;
|
|
return;
|
|
}
|
|
|
|
if (!list_empty(&local->work_list)) {
|
|
local->ps_sdata = NULL;
|
|
goto change;
|
|
}
|
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (!ieee80211_sdata_running(sdata))
|
|
continue;
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP) {
|
|
/* If an AP vif is found, then disable PS
|
|
* by setting the count to zero thereby setting
|
|
* ps_sdata to NULL.
|
|
*/
|
|
count = 0;
|
|
break;
|
|
}
|
|
if (sdata->vif.type != NL80211_IFTYPE_STATION)
|
|
continue;
|
|
found = sdata;
|
|
count++;
|
|
}
|
|
|
|
if (count == 1 && ieee80211_powersave_allowed(found)) {
|
|
struct ieee80211_conf *conf = &local->hw.conf;
|
|
s32 beaconint_us;
|
|
|
|
if (latency < 0)
|
|
latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
|
|
|
|
beaconint_us = ieee80211_tu_to_usec(
|
|
found->vif.bss_conf.beacon_int);
|
|
|
|
timeout = local->dynamic_ps_forced_timeout;
|
|
if (timeout < 0) {
|
|
/*
|
|
* Go to full PSM if the user configures a very low
|
|
* latency requirement.
|
|
* The 2000 second value is there for compatibility
|
|
* until the PM_QOS_NETWORK_LATENCY is configured
|
|
* with real values.
|
|
*/
|
|
if (latency > (1900 * USEC_PER_MSEC) &&
|
|
latency != (2000 * USEC_PER_SEC))
|
|
timeout = 0;
|
|
else
|
|
timeout = 100;
|
|
}
|
|
local->dynamic_ps_user_timeout = timeout;
|
|
if (!local->disable_dynamic_ps)
|
|
conf->dynamic_ps_timeout =
|
|
local->dynamic_ps_user_timeout;
|
|
|
|
if (beaconint_us > latency) {
|
|
local->ps_sdata = NULL;
|
|
} else {
|
|
struct ieee80211_bss *bss;
|
|
int maxslp = 1;
|
|
u8 dtimper;
|
|
|
|
bss = (void *)found->u.mgd.associated->priv;
|
|
dtimper = bss->dtim_period;
|
|
|
|
/* If the TIM IE is invalid, pretend the value is 1 */
|
|
if (!dtimper)
|
|
dtimper = 1;
|
|
else if (dtimper > 1)
|
|
maxslp = min_t(int, dtimper,
|
|
latency / beaconint_us);
|
|
|
|
local->hw.conf.max_sleep_period = maxslp;
|
|
local->hw.conf.ps_dtim_period = dtimper;
|
|
local->ps_sdata = found;
|
|
}
|
|
} else {
|
|
local->ps_sdata = NULL;
|
|
}
|
|
|
|
change:
|
|
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;
|
|
struct ieee80211_if_managed *ifmgd;
|
|
unsigned long flags;
|
|
int q;
|
|
|
|
/* can only happen when PS was just disabled anyway */
|
|
if (!sdata)
|
|
return;
|
|
|
|
ifmgd = &sdata->u.mgd;
|
|
|
|
if (local->hw.conf.flags & IEEE80211_CONF_PS)
|
|
return;
|
|
|
|
if (!local->disable_dynamic_ps &&
|
|
local->hw.conf.dynamic_ps_timeout > 0) {
|
|
/* don't enter PS if TX frames are pending */
|
|
if (drv_tx_frames_pending(local)) {
|
|
mod_timer(&local->dynamic_ps_timer, jiffies +
|
|
msecs_to_jiffies(
|
|
local->hw.conf.dynamic_ps_timeout));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* transmission can be stopped by others which leads to
|
|
* dynamic_ps_timer expiry. Postpone the ps timer if it
|
|
* is not the actual idle state.
|
|
*/
|
|
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
|
|
for (q = 0; q < local->hw.queues; q++) {
|
|
if (local->queue_stop_reasons[q]) {
|
|
spin_unlock_irqrestore(&local->queue_stop_reason_lock,
|
|
flags);
|
|
mod_timer(&local->dynamic_ps_timer, jiffies +
|
|
msecs_to_jiffies(
|
|
local->hw.conf.dynamic_ps_timeout));
|
|
return;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
|
|
}
|
|
|
|
if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
|
|
(!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
|
|
netif_tx_stop_all_queues(sdata->dev);
|
|
|
|
if (drv_tx_frames_pending(local))
|
|
mod_timer(&local->dynamic_ps_timer, jiffies +
|
|
msecs_to_jiffies(
|
|
local->hw.conf.dynamic_ps_timeout));
|
|
else {
|
|
ieee80211_send_nullfunc(local, sdata, 1);
|
|
/* Flush to get the tx status of nullfunc frame */
|
|
drv_flush(local, false);
|
|
}
|
|
}
|
|
|
|
if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
|
|
(local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
|
|
(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
|
|
ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
|
|
local->hw.conf.flags |= IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
|
}
|
|
|
|
if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
|
|
netif_tx_wake_all_queues(sdata->dev);
|
|
}
|
|
|
|
void ieee80211_dynamic_ps_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_local *local = (void *) data;
|
|
|
|
if (local->quiescing || local->suspended)
|
|
return;
|
|
|
|
ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
|
|
}
|
|
|
|
/* MLME */
|
|
static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
|
|
struct ieee80211_sub_if_data *sdata,
|
|
u8 *wmm_param, size_t wmm_param_len)
|
|
{
|
|
struct ieee80211_tx_queue_params params;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
size_t left;
|
|
int count;
|
|
u8 *pos, uapsd_queues = 0;
|
|
|
|
if (!local->ops->conf_tx)
|
|
return;
|
|
|
|
if (local->hw.queues < 4)
|
|
return;
|
|
|
|
if (!wmm_param)
|
|
return;
|
|
|
|
if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
|
|
return;
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
|
|
uapsd_queues = local->uapsd_queues;
|
|
|
|
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;
|
|
bool uapsd = false;
|
|
int queue;
|
|
|
|
switch (aci) {
|
|
case 1: /* AC_BK */
|
|
queue = 3;
|
|
if (acm)
|
|
local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
|
|
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
|
|
uapsd = true;
|
|
break;
|
|
case 2: /* AC_VI */
|
|
queue = 1;
|
|
if (acm)
|
|
local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
|
|
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
|
|
uapsd = true;
|
|
break;
|
|
case 3: /* AC_VO */
|
|
queue = 0;
|
|
if (acm)
|
|
local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
|
|
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
|
|
uapsd = true;
|
|
break;
|
|
case 0: /* AC_BE */
|
|
default:
|
|
queue = 2;
|
|
if (acm)
|
|
local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
|
|
if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
|
|
uapsd = true;
|
|
break;
|
|
}
|
|
|
|
params.aifs = pos[0] & 0x0f;
|
|
params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
|
|
params.cw_min = ecw2cw(pos[1] & 0x0f);
|
|
params.txop = get_unaligned_le16(pos + 2);
|
|
params.uapsd = uapsd;
|
|
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
wiphy_debug(local->hw.wiphy,
|
|
"WMM queue=%d aci=%d acm=%d aifs=%d "
|
|
"cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
|
|
queue, aci, acm,
|
|
params.aifs, params.cw_min, params.cw_max,
|
|
params.txop, params.uapsd);
|
|
#endif
|
|
sdata->tx_conf[queue] = params;
|
|
if (drv_conf_tx(local, sdata, queue, ¶ms))
|
|
wiphy_debug(local->hw.wiphy,
|
|
"failed to set TX queue parameters for queue %d\n",
|
|
queue);
|
|
}
|
|
|
|
/* enable WMM or activate new settings */
|
|
sdata->vif.bss_conf.qos = true;
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
|
|
}
|
|
|
|
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 (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
|
|
use_short_slot = true;
|
|
|
|
if (use_protection != bss_conf->use_cts_prot) {
|
|
bss_conf->use_cts_prot = use_protection;
|
|
changed |= BSS_CHANGED_ERP_CTS_PROT;
|
|
}
|
|
|
|
if (use_short_preamble != bss_conf->use_short_preamble) {
|
|
bss_conf->use_short_preamble = use_short_preamble;
|
|
changed |= BSS_CHANGED_ERP_PREAMBLE;
|
|
}
|
|
|
|
if (use_short_slot != bss_conf->use_short_slot) {
|
|
bss_conf->use_short_slot = use_short_slot;
|
|
changed |= BSS_CHANGED_ERP_SLOT;
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_bss *cbss,
|
|
u32 bss_info_changed)
|
|
{
|
|
struct ieee80211_bss *bss = (void *)cbss->priv;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
|
|
|
|
bss_info_changed |= BSS_CHANGED_ASSOC;
|
|
/* set timing information */
|
|
bss_conf->beacon_int = cbss->beacon_interval;
|
|
bss_conf->timestamp = cbss->tsf;
|
|
|
|
bss_info_changed |= BSS_CHANGED_BEACON_INT;
|
|
bss_info_changed |= ieee80211_handle_bss_capability(sdata,
|
|
cbss->capability, bss->has_erp_value, bss->erp_value);
|
|
|
|
sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
|
|
IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
|
|
|
|
sdata->u.mgd.associated = cbss;
|
|
memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
|
|
|
|
sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
|
|
|
|
/* just to be sure */
|
|
sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
|
|
IEEE80211_STA_BEACON_POLL);
|
|
|
|
ieee80211_led_assoc(local, 1);
|
|
|
|
if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
|
|
bss_conf->dtim_period = bss->dtim_period;
|
|
else
|
|
bss_conf->dtim_period = 0;
|
|
|
|
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;
|
|
|
|
/* Tell the driver to monitor connection quality (if supported) */
|
|
if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
|
|
bss_conf->cqm_rssi_thold)
|
|
bss_info_changed |= BSS_CHANGED_CQM;
|
|
|
|
/* Enable ARP filtering */
|
|
if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
|
|
bss_conf->arp_filter_enabled = sdata->arp_filter_state;
|
|
bss_info_changed |= BSS_CHANGED_ARP_FILTER;
|
|
}
|
|
|
|
ieee80211_bss_info_change_notify(sdata, bss_info_changed);
|
|
|
|
mutex_lock(&local->iflist_mtx);
|
|
ieee80211_recalc_ps(local, -1);
|
|
ieee80211_recalc_smps(local);
|
|
mutex_unlock(&local->iflist_mtx);
|
|
|
|
netif_tx_start_all_queues(sdata->dev);
|
|
netif_carrier_on(sdata->dev);
|
|
}
|
|
|
|
static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
|
|
bool remove_sta, bool tx)
|
|
{
|
|
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->bssid, ETH_ALEN);
|
|
|
|
ifmgd->associated = NULL;
|
|
memset(ifmgd->bssid, 0, ETH_ALEN);
|
|
|
|
/*
|
|
* 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);
|
|
|
|
mutex_lock(&local->sta_mtx);
|
|
sta = sta_info_get(sdata, bssid);
|
|
if (sta) {
|
|
set_sta_flag(sta, WLAN_STA_BLOCK_BA);
|
|
ieee80211_sta_tear_down_BA_sessions(sta, tx);
|
|
}
|
|
mutex_unlock(&local->sta_mtx);
|
|
|
|
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);
|
|
|
|
/* channel(_type) changes are handled by ieee80211_hw_config */
|
|
WARN_ON(!ieee80211_set_channel_type(local, sdata, 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;
|
|
}
|
|
local->ps_sdata = NULL;
|
|
|
|
ieee80211_hw_config(local, config_changed);
|
|
|
|
/* Disable ARP filtering */
|
|
if (sdata->vif.bss_conf.arp_filter_enabled) {
|
|
sdata->vif.bss_conf.arp_filter_enabled = false;
|
|
changed |= BSS_CHANGED_ARP_FILTER;
|
|
}
|
|
|
|
/* The BSSID (not really interesting) and HT changed */
|
|
changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
|
|
/* remove AP and TDLS peers */
|
|
if (remove_sta)
|
|
sta_info_flush(local, sdata);
|
|
|
|
del_timer_sync(&sdata->u.mgd.conn_mon_timer);
|
|
del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
|
|
del_timer_sync(&sdata->u.mgd.timer);
|
|
del_timer_sync(&sdata->u.mgd.chswitch_timer);
|
|
}
|
|
|
|
void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_hdr *hdr)
|
|
{
|
|
/*
|
|
* We can postpone the mgd.timer whenever receiving unicast frames
|
|
* from AP because we know that the connection is working both ways
|
|
* at that time. But multicast frames (and hence also beacons) must
|
|
* be ignored here, because we need to trigger the timer during
|
|
* data idle periods for sending the periodic probe request to the
|
|
* AP we're connected to.
|
|
*/
|
|
if (is_multicast_ether_addr(hdr->addr1))
|
|
return;
|
|
|
|
ieee80211_sta_reset_conn_monitor(sdata);
|
|
}
|
|
|
|
static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
|
|
IEEE80211_STA_CONNECTION_POLL)))
|
|
return;
|
|
|
|
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);
|
|
|
|
if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
|
|
return;
|
|
|
|
/*
|
|
* We've received a probe response, but are not sure whether
|
|
* we have or will be receiving any beacons or data, so let's
|
|
* schedule the timers again, just in case.
|
|
*/
|
|
ieee80211_sta_reset_beacon_monitor(sdata);
|
|
|
|
mod_timer(&ifmgd->conn_mon_timer,
|
|
round_jiffies_up(jiffies +
|
|
IEEE80211_CONNECTION_IDLE_TIME));
|
|
}
|
|
|
|
void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_hdr *hdr, bool ack)
|
|
{
|
|
if (!ieee80211_is_data(hdr->frame_control))
|
|
return;
|
|
|
|
if (ack)
|
|
ieee80211_sta_reset_conn_monitor(sdata);
|
|
|
|
if (ieee80211_is_nullfunc(hdr->frame_control) &&
|
|
sdata->u.mgd.probe_send_count > 0) {
|
|
if (ack)
|
|
sdata->u.mgd.probe_send_count = 0;
|
|
else
|
|
sdata->u.mgd.nullfunc_failed = true;
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->work);
|
|
}
|
|
}
|
|
|
|
static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
const u8 *ssid;
|
|
u8 *dst = ifmgd->associated->bssid;
|
|
u8 unicast_limit = max(1, max_probe_tries - 3);
|
|
|
|
/*
|
|
* Try sending broadcast probe requests for the last three
|
|
* probe requests after the first ones failed since some
|
|
* buggy APs only support broadcast probe requests.
|
|
*/
|
|
if (ifmgd->probe_send_count >= unicast_limit)
|
|
dst = NULL;
|
|
|
|
/*
|
|
* When the hardware reports an accurate Tx ACK status, it's
|
|
* better to send a nullfunc frame instead of a probe request,
|
|
* as it will kick us off the AP quickly if we aren't associated
|
|
* anymore. The timeout will be reset if the frame is ACKed by
|
|
* the AP.
|
|
*/
|
|
if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
|
|
ifmgd->nullfunc_failed = false;
|
|
ieee80211_send_nullfunc(sdata->local, sdata, 0);
|
|
} else {
|
|
ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
|
|
ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
|
|
(u32) -1, true, false);
|
|
}
|
|
|
|
ifmgd->probe_send_count++;
|
|
ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
|
|
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 (!ieee80211_sdata_running(sdata))
|
|
return;
|
|
|
|
if (sdata->local->scanning)
|
|
return;
|
|
|
|
if (sdata->local->tmp_channel)
|
|
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->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);
|
|
}
|
|
|
|
struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct sk_buff *skb;
|
|
const u8 *ssid;
|
|
|
|
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
|
|
return NULL;
|
|
|
|
ASSERT_MGD_MTX(ifmgd);
|
|
|
|
if (!ifmgd->associated)
|
|
return NULL;
|
|
|
|
ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
|
|
skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
|
|
(u32) -1, ssid + 2, ssid[1],
|
|
NULL, 0, true);
|
|
|
|
return skb;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_ap_probereq_get);
|
|
|
|
static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
u8 bssid[ETH_ALEN];
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
if (!ifmgd->associated) {
|
|
mutex_unlock(&ifmgd->mtx);
|
|
return;
|
|
}
|
|
|
|
memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
|
|
|
|
printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
|
|
sdata->name, bssid);
|
|
|
|
ieee80211_set_disassoc(sdata, true, 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, true);
|
|
|
|
mutex_lock(&local->mtx);
|
|
ieee80211_recalc_idle(local);
|
|
mutex_unlock(&local->mtx);
|
|
}
|
|
|
|
void ieee80211_beacon_connection_loss_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
container_of(work, struct ieee80211_sub_if_data,
|
|
u.mgd.beacon_connection_loss_work);
|
|
|
|
if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
|
|
__ieee80211_connection_loss(sdata);
|
|
else
|
|
ieee80211_mgd_probe_ap(sdata, true);
|
|
}
|
|
|
|
void ieee80211_beacon_loss(struct ieee80211_vif *vif)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
struct ieee80211_hw *hw = &sdata->local->hw;
|
|
|
|
trace_api_beacon_loss(sdata);
|
|
|
|
WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
|
|
ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_beacon_loss);
|
|
|
|
void ieee80211_connection_loss(struct ieee80211_vif *vif)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
struct ieee80211_hw *hw = &sdata->local->hw;
|
|
|
|
trace_api_connection_loss(sdata);
|
|
|
|
WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
|
|
ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_connection_loss);
|
|
|
|
|
|
static enum rx_mgmt_action __must_check
|
|
ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
const u8 *bssid = NULL;
|
|
u16 reason_code;
|
|
|
|
if (len < 24 + 2)
|
|
return RX_MGMT_NONE;
|
|
|
|
ASSERT_MGD_MTX(ifmgd);
|
|
|
|
bssid = ifmgd->associated->bssid;
|
|
|
|
reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
|
|
|
|
printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
|
|
sdata->name, bssid, reason_code);
|
|
|
|
ieee80211_set_disassoc(sdata, true, false);
|
|
mutex_lock(&sdata->local->mtx);
|
|
ieee80211_recalc_idle(sdata->local);
|
|
mutex_unlock(&sdata->local->mtx);
|
|
|
|
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->bssid, mgmt->sa, ETH_ALEN)))
|
|
return RX_MGMT_NONE;
|
|
|
|
reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
|
|
|
|
printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
|
|
sdata->name, mgmt->sa, reason_code);
|
|
|
|
ieee80211_set_disassoc(sdata, true, false);
|
|
mutex_lock(&sdata->local->mtx);
|
|
ieee80211_recalc_idle(sdata->local);
|
|
mutex_unlock(&sdata->local->mtx);
|
|
return RX_MGMT_CFG80211_DISASSOC;
|
|
}
|
|
|
|
static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
|
|
u8 *supp_rates, unsigned int supp_rates_len,
|
|
u32 *rates, u32 *basic_rates,
|
|
bool *have_higher_than_11mbit,
|
|
int *min_rate, int *min_rate_index)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < supp_rates_len; i++) {
|
|
int rate = (supp_rates[i] & 0x7f) * 5;
|
|
bool is_basic = !!(supp_rates[i] & 0x80);
|
|
|
|
if (rate > 110)
|
|
*have_higher_than_11mbit = true;
|
|
|
|
/*
|
|
* BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
|
|
* 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
|
|
*
|
|
* Note: Even through the membership selector and the basic
|
|
* rate flag share the same bit, they are not exactly
|
|
* the same.
|
|
*/
|
|
if (!!(supp_rates[i] & 0x80) &&
|
|
(supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
|
|
continue;
|
|
|
|
for (j = 0; j < sband->n_bitrates; j++) {
|
|
if (sband->bitrates[j].bitrate == rate) {
|
|
*rates |= BIT(j);
|
|
if (is_basic)
|
|
*basic_rates |= BIT(j);
|
|
if (rate < *min_rate) {
|
|
*min_rate = rate;
|
|
*min_rate_index = j;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool ieee80211_assoc_success(struct ieee80211_work *wk,
|
|
struct ieee80211_mgmt *mgmt, size_t len)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = wk->sdata;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_supported_band *sband;
|
|
struct sta_info *sta;
|
|
struct cfg80211_bss *cbss = wk->assoc.bss;
|
|
u8 *pos;
|
|
u32 rates, basic_rates;
|
|
u16 capab_info, aid;
|
|
struct ieee802_11_elems elems;
|
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
|
|
u32 changed = 0;
|
|
int err;
|
|
bool have_higher_than_11mbit = false;
|
|
u16 ap_ht_cap_flags;
|
|
int min_rate = INT_MAX, min_rate_index = -1;
|
|
|
|
/* AssocResp and ReassocResp have identical structure */
|
|
|
|
aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
|
|
capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
|
|
|
|
if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
|
|
printk(KERN_DEBUG
|
|
"%s: invalid AID value 0x%x; bits 15:14 not set\n",
|
|
sdata->name, aid);
|
|
aid &= ~(BIT(15) | BIT(14));
|
|
|
|
ifmgd->broken_ap = false;
|
|
|
|
if (aid == 0 || aid > IEEE80211_MAX_AID) {
|
|
printk(KERN_DEBUG
|
|
"%s: invalid AID value %d (out of range), turn off PS\n",
|
|
sdata->name, aid);
|
|
aid = 0;
|
|
ifmgd->broken_ap = true;
|
|
}
|
|
|
|
pos = mgmt->u.assoc_resp.variable;
|
|
ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
|
|
|
|
if (!elems.supp_rates) {
|
|
printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
|
|
sdata->name);
|
|
return false;
|
|
}
|
|
|
|
ifmgd->aid = aid;
|
|
|
|
mutex_lock(&sdata->local->sta_mtx);
|
|
/*
|
|
* station info was already allocated and inserted before
|
|
* the association and should be available to us
|
|
*/
|
|
sta = sta_info_get_rx(sdata, cbss->bssid);
|
|
if (WARN_ON(!sta)) {
|
|
mutex_unlock(&sdata->local->sta_mtx);
|
|
return false;
|
|
}
|
|
|
|
set_sta_flag(sta, WLAN_STA_AUTH);
|
|
set_sta_flag(sta, WLAN_STA_ASSOC);
|
|
set_sta_flag(sta, WLAN_STA_ASSOC_AP);
|
|
if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
|
|
set_sta_flag(sta, WLAN_STA_AUTHORIZED);
|
|
|
|
rates = 0;
|
|
basic_rates = 0;
|
|
sband = local->hw.wiphy->bands[wk->chan->band];
|
|
|
|
ieee80211_get_rates(sband, elems.supp_rates, elems.supp_rates_len,
|
|
&rates, &basic_rates, &have_higher_than_11mbit,
|
|
&min_rate, &min_rate_index);
|
|
|
|
ieee80211_get_rates(sband, elems.ext_supp_rates,
|
|
elems.ext_supp_rates_len, &rates, &basic_rates,
|
|
&have_higher_than_11mbit,
|
|
&min_rate, &min_rate_index);
|
|
|
|
/*
|
|
* some buggy APs don't advertise basic_rates. use the lowest
|
|
* supported rate instead.
|
|
*/
|
|
if (unlikely(!basic_rates) && min_rate_index >= 0) {
|
|
printk(KERN_DEBUG "%s: No basic rates in AssocResp. "
|
|
"Using min supported rate instead.\n", sdata->name);
|
|
basic_rates = BIT(min_rate_index);
|
|
}
|
|
|
|
sta->sta.supp_rates[wk->chan->band] = rates;
|
|
sdata->vif.bss_conf.basic_rates = basic_rates;
|
|
|
|
/* cf. IEEE 802.11 9.2.12 */
|
|
if (wk->chan->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_flag(sta, WLAN_STA_MFP);
|
|
|
|
if (elems.wmm_param)
|
|
set_sta_flag(sta, WLAN_STA_WME);
|
|
|
|
/* sta_info_reinsert will also unlock the mutex lock */
|
|
err = sta_info_reinsert(sta);
|
|
sta = NULL;
|
|
if (err) {
|
|
printk(KERN_DEBUG "%s: failed to insert STA entry for"
|
|
" the AP (error %d)\n", sdata->name, err);
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Always handle WMM once after association regardless
|
|
* of the first value the AP uses. Setting -1 here has
|
|
* that effect because the AP values is an unsigned
|
|
* 4-bit value.
|
|
*/
|
|
ifmgd->wmm_last_param_set = -1;
|
|
|
|
if (elems.wmm_param)
|
|
ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
|
|
elems.wmm_param_len);
|
|
else
|
|
ieee80211_set_wmm_default(sdata);
|
|
|
|
local->oper_channel = wk->chan;
|
|
|
|
if (elems.ht_info_elem && elems.wmm_param &&
|
|
(sdata->local->hw.queues >= 4) &&
|
|
!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
|
|
changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
|
|
cbss->bssid, ap_ht_cap_flags,
|
|
false);
|
|
|
|
/* set AID and assoc capability,
|
|
* ieee80211_set_associated() will tell the driver */
|
|
bss_conf->aid = aid;
|
|
bss_conf->assoc_capability = capab_info;
|
|
ieee80211_set_associated(sdata, cbss, changed);
|
|
|
|
/*
|
|
* If we're using 4-addr mode, let the AP know that we're
|
|
* doing so, so that it can create the STA VLAN on its side
|
|
*/
|
|
if (ifmgd->use_4addr)
|
|
ieee80211_send_4addr_nullfunc(local, sdata);
|
|
|
|
/*
|
|
* Start timer to probe the connection to the AP now.
|
|
* Also start the timer that will detect beacon loss.
|
|
*/
|
|
ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
|
|
ieee80211_sta_reset_beacon_monitor(sdata);
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
static 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;
|
|
bool need_ps = false;
|
|
|
|
if (sdata->u.mgd.associated) {
|
|
bss = (void *)sdata->u.mgd.associated->priv;
|
|
/* not previously set so we may need to recalc */
|
|
need_ps = !bss->dtim_period;
|
|
}
|
|
|
|
if (elems->ds_params && elems->ds_params_len == 1)
|
|
freq = ieee80211_channel_to_frequency(elems->ds_params[0],
|
|
rx_status->band);
|
|
else
|
|
freq = rx_status->freq;
|
|
|
|
channel = ieee80211_get_channel(local->hw.wiphy, freq);
|
|
|
|
if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
|
|
return;
|
|
|
|
bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
|
|
channel, beacon);
|
|
if (bss)
|
|
ieee80211_rx_bss_put(local, bss);
|
|
|
|
if (!sdata->u.mgd.associated)
|
|
return;
|
|
|
|
if (need_ps) {
|
|
mutex_lock(&local->iflist_mtx);
|
|
ieee80211_recalc_ps(local, -1);
|
|
mutex_unlock(&local->iflist_mtx);
|
|
}
|
|
|
|
if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
|
|
(memcmp(mgmt->bssid, sdata->u.mgd.associated->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, rx_status->mactime);
|
|
}
|
|
}
|
|
|
|
|
|
static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_mgmt *mgmt = (void *)skb->data;
|
|
struct ieee80211_if_managed *ifmgd;
|
|
struct ieee80211_rx_status *rx_status = (void *) skb->cb;
|
|
size_t baselen, len = skb->len;
|
|
struct ieee802_11_elems elems;
|
|
|
|
ifmgd = &sdata->u.mgd;
|
|
|
|
ASSERT_MGD_MTX(ifmgd);
|
|
|
|
if (memcmp(mgmt->da, sdata->vif.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);
|
|
|
|
if (ifmgd->associated &&
|
|
memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
|
|
ieee80211_reset_ap_probe(sdata);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
|
|
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->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;
|
|
|
|
/* Track average RSSI from the Beacon frames of the current AP */
|
|
ifmgd->last_beacon_signal = rx_status->signal;
|
|
if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
|
|
ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
|
|
ifmgd->ave_beacon_signal = rx_status->signal * 16;
|
|
ifmgd->last_cqm_event_signal = 0;
|
|
ifmgd->count_beacon_signal = 1;
|
|
ifmgd->last_ave_beacon_signal = 0;
|
|
} else {
|
|
ifmgd->ave_beacon_signal =
|
|
(IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
|
|
(16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
|
|
ifmgd->ave_beacon_signal) / 16;
|
|
ifmgd->count_beacon_signal++;
|
|
}
|
|
|
|
if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
|
|
ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
|
|
int sig = ifmgd->ave_beacon_signal;
|
|
int last_sig = ifmgd->last_ave_beacon_signal;
|
|
|
|
/*
|
|
* if signal crosses either of the boundaries, invoke callback
|
|
* with appropriate parameters
|
|
*/
|
|
if (sig > ifmgd->rssi_max_thold &&
|
|
(last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
|
|
ifmgd->last_ave_beacon_signal = sig;
|
|
drv_rssi_callback(local, RSSI_EVENT_HIGH);
|
|
} else if (sig < ifmgd->rssi_min_thold &&
|
|
(last_sig >= ifmgd->rssi_max_thold ||
|
|
last_sig == 0)) {
|
|
ifmgd->last_ave_beacon_signal = sig;
|
|
drv_rssi_callback(local, RSSI_EVENT_LOW);
|
|
}
|
|
}
|
|
|
|
if (bss_conf->cqm_rssi_thold &&
|
|
ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
|
|
!(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
|
|
int sig = ifmgd->ave_beacon_signal / 16;
|
|
int last_event = ifmgd->last_cqm_event_signal;
|
|
int thold = bss_conf->cqm_rssi_thold;
|
|
int hyst = bss_conf->cqm_rssi_hyst;
|
|
if (sig < thold &&
|
|
(last_event == 0 || sig < last_event - hyst)) {
|
|
ifmgd->last_cqm_event_signal = sig;
|
|
ieee80211_cqm_rssi_notify(
|
|
&sdata->vif,
|
|
NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
|
|
GFP_KERNEL);
|
|
} else if (sig > thold &&
|
|
(last_event == 0 || sig > last_event + hyst)) {
|
|
ifmgd->last_cqm_event_signal = sig;
|
|
ieee80211_cqm_rssi_notify(
|
|
&sdata->vif,
|
|
NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
|
|
GFP_KERNEL);
|
|
}
|
|
}
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
if (net_ratelimit()) {
|
|
printk(KERN_DEBUG "%s: cancelling probereq poll due "
|
|
"to a received beacon\n", sdata->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.
|
|
*/
|
|
ieee80211_sta_reset_beacon_monitor(sdata);
|
|
|
|
ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
|
|
ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
|
|
len - baselen, &elems,
|
|
care_about_ies, ncrc);
|
|
|
|
if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
|
|
directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
|
|
ifmgd->aid);
|
|
|
|
if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
|
|
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
|
|
true);
|
|
|
|
ieee80211_sta_wmm_params(local, sdata, 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 && ifmgd->beacon_crc_valid)
|
|
return;
|
|
ifmgd->beacon_crc = ncrc;
|
|
ifmgd->beacon_crc_valid = true;
|
|
|
|
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(sdata, 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, true);
|
|
}
|
|
|
|
/* 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);
|
|
}
|
|
|
|
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;
|
|
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->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, skb);
|
|
break;
|
|
case IEEE80211_STYPE_DEAUTH:
|
|
rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
|
|
break;
|
|
case IEEE80211_STYPE_DISASSOC:
|
|
rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
|
|
break;
|
|
case IEEE80211_STYPE_ACTION:
|
|
switch (mgmt->u.action.category) {
|
|
case WLAN_CATEGORY_SPECTRUM_MGMT:
|
|
ieee80211_sta_process_chanswitch(sdata,
|
|
&mgmt->u.action.u.chan_switch.sw_elem,
|
|
(void *)ifmgd->associated->priv,
|
|
rx_status->mactime);
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
switch (rma) {
|
|
case RX_MGMT_NONE:
|
|
/* no action */
|
|
break;
|
|
case RX_MGMT_CFG80211_DEAUTH:
|
|
cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
|
|
break;
|
|
case RX_MGMT_CFG80211_DISASSOC:
|
|
cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
|
|
break;
|
|
default:
|
|
WARN(1, "unexpected: %d", rma);
|
|
}
|
|
return;
|
|
}
|
|
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
|
|
(fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_work *wk;
|
|
|
|
mutex_lock(&local->mtx);
|
|
list_for_each_entry(wk, &local->work_list, list) {
|
|
if (wk->sdata != sdata)
|
|
continue;
|
|
|
|
if (wk->type != IEEE80211_WORK_ASSOC &&
|
|
wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
|
|
continue;
|
|
|
|
if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
|
|
continue;
|
|
if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
|
|
continue;
|
|
|
|
/*
|
|
* Printing the message only here means we can't
|
|
* spuriously print it, but it also means that it
|
|
* won't be printed when the frame comes in before
|
|
* we even tried to associate or in similar cases.
|
|
*
|
|
* Ultimately, I suspect cfg80211 should print the
|
|
* messages instead.
|
|
*/
|
|
printk(KERN_DEBUG
|
|
"%s: deauthenticated from %pM (Reason: %u)\n",
|
|
sdata->name, mgmt->bssid,
|
|
le16_to_cpu(mgmt->u.deauth.reason_code));
|
|
|
|
list_del_rcu(&wk->list);
|
|
free_work(wk);
|
|
break;
|
|
}
|
|
mutex_unlock(&local->mtx);
|
|
|
|
cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
|
|
}
|
|
}
|
|
|
|
static void ieee80211_sta_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
(struct ieee80211_sub_if_data *) data;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
if (local->quiescing) {
|
|
set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
|
|
return;
|
|
}
|
|
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
}
|
|
|
|
static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
|
|
u8 *bssid, u8 reason)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
|
|
IEEE80211_STA_BEACON_POLL);
|
|
|
|
ieee80211_set_disassoc(sdata, true, 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, reason,
|
|
NULL, true);
|
|
|
|
mutex_lock(&local->mtx);
|
|
ieee80211_recalc_idle(local);
|
|
mutex_unlock(&local->mtx);
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
}
|
|
|
|
void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
/* 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];
|
|
int max_tries;
|
|
|
|
memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
|
|
|
|
if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
|
|
max_tries = max_nullfunc_tries;
|
|
else
|
|
max_tries = max_probe_tries;
|
|
|
|
/* ACK received for nullfunc probing frame */
|
|
if (!ifmgd->probe_send_count)
|
|
ieee80211_reset_ap_probe(sdata);
|
|
else if (ifmgd->nullfunc_failed) {
|
|
if (ifmgd->probe_send_count < max_tries) {
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
wiphy_debug(local->hw.wiphy,
|
|
"%s: No ack for nullfunc frame to"
|
|
" AP %pM, try %d/%i\n",
|
|
sdata->name, bssid,
|
|
ifmgd->probe_send_count, max_tries);
|
|
#endif
|
|
ieee80211_mgd_probe_ap_send(sdata);
|
|
} else {
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
wiphy_debug(local->hw.wiphy,
|
|
"%s: No ack for nullfunc frame to"
|
|
" AP %pM, disconnecting.\n",
|
|
sdata->name, bssid);
|
|
#endif
|
|
ieee80211_sta_connection_lost(sdata, bssid,
|
|
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
|
|
}
|
|
} else if (time_is_after_jiffies(ifmgd->probe_timeout))
|
|
run_again(ifmgd, ifmgd->probe_timeout);
|
|
else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
wiphy_debug(local->hw.wiphy,
|
|
"%s: Failed to send nullfunc to AP %pM"
|
|
" after %dms, disconnecting.\n",
|
|
sdata->name,
|
|
bssid, probe_wait_ms);
|
|
#endif
|
|
ieee80211_sta_connection_lost(sdata, bssid,
|
|
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
|
|
} else if (ifmgd->probe_send_count < max_tries) {
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
wiphy_debug(local->hw.wiphy,
|
|
"%s: No probe response from AP %pM"
|
|
" after %dms, try %d/%i\n",
|
|
sdata->name,
|
|
bssid, probe_wait_ms,
|
|
ifmgd->probe_send_count, max_tries);
|
|
#endif
|
|
ieee80211_mgd_probe_ap_send(sdata);
|
|
} else {
|
|
/*
|
|
* We actually lost the connection ... or did we?
|
|
* Let's make sure!
|
|
*/
|
|
wiphy_debug(local->hw.wiphy,
|
|
"%s: No probe response from AP %pM"
|
|
" after %dms, disconnecting.\n",
|
|
sdata->name,
|
|
bssid, probe_wait_ms);
|
|
|
|
ieee80211_sta_connection_lost(sdata, bssid,
|
|
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&ifmgd->mtx);
|
|
}
|
|
|
|
static void ieee80211_sta_bcn_mon_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
(struct ieee80211_sub_if_data *) data;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
if (local->quiescing)
|
|
return;
|
|
|
|
ieee80211_queue_work(&sdata->local->hw,
|
|
&sdata->u.mgd.beacon_connection_loss_work);
|
|
}
|
|
|
|
static void ieee80211_sta_conn_mon_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
(struct ieee80211_sub_if_data *) data;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
if (local->quiescing)
|
|
return;
|
|
|
|
ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
|
|
}
|
|
|
|
static void ieee80211_sta_monitor_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
container_of(work, struct ieee80211_sub_if_data,
|
|
u.mgd.monitor_work);
|
|
|
|
ieee80211_mgd_probe_ap(sdata, false);
|
|
}
|
|
|
|
static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
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->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->request_smps_work);
|
|
|
|
cancel_work_sync(&ifmgd->beacon_connection_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 (!ifmgd->associated)
|
|
return;
|
|
|
|
if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
|
|
sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
|
|
mutex_lock(&ifmgd->mtx);
|
|
if (ifmgd->associated) {
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
wiphy_debug(sdata->local->hw.wiphy,
|
|
"%s: driver requested disconnect after resume.\n",
|
|
sdata->name);
|
|
#endif
|
|
ieee80211_sta_connection_lost(sdata,
|
|
ifmgd->associated->bssid,
|
|
WLAN_REASON_UNSPECIFIED);
|
|
mutex_unlock(&ifmgd->mtx);
|
|
return;
|
|
}
|
|
mutex_unlock(&ifmgd->mtx);
|
|
}
|
|
|
|
if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
|
|
add_timer(&ifmgd->timer);
|
|
if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
|
|
add_timer(&ifmgd->chswitch_timer);
|
|
ieee80211_sta_reset_beacon_monitor(sdata);
|
|
ieee80211_restart_sta_timer(sdata);
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
|
|
}
|
|
#endif
|
|
|
|
/* interface setup */
|
|
void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd;
|
|
|
|
ifmgd = &sdata->u.mgd;
|
|
INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
|
|
INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
|
|
INIT_WORK(&ifmgd->beacon_connection_loss_work,
|
|
ieee80211_beacon_connection_loss_work);
|
|
INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
|
|
setup_timer(&ifmgd->timer, ieee80211_sta_timer,
|
|
(unsigned long) sdata);
|
|
setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
|
|
(unsigned long) sdata);
|
|
setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
|
|
(unsigned long) sdata);
|
|
setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
|
|
(unsigned long) sdata);
|
|
|
|
ifmgd->flags = 0;
|
|
|
|
mutex_init(&ifmgd->mtx);
|
|
|
|
if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
|
|
ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
|
|
else
|
|
ifmgd->req_smps = IEEE80211_SMPS_OFF;
|
|
}
|
|
|
|
/* scan finished notification */
|
|
void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = 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 */
|
|
static enum work_done_result
|
|
ieee80211_probe_auth_done(struct ieee80211_work *wk,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_local *local = wk->sdata->local;
|
|
|
|
if (!skb) {
|
|
cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
|
|
goto destroy;
|
|
}
|
|
|
|
if (wk->type == IEEE80211_WORK_AUTH) {
|
|
cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
|
|
goto destroy;
|
|
}
|
|
|
|
mutex_lock(&wk->sdata->u.mgd.mtx);
|
|
ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
|
|
mutex_unlock(&wk->sdata->u.mgd.mtx);
|
|
|
|
wk->type = IEEE80211_WORK_AUTH;
|
|
wk->probe_auth.tries = 0;
|
|
return WORK_DONE_REQUEUE;
|
|
destroy:
|
|
if (wk->probe_auth.synced)
|
|
drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
|
|
IEEE80211_TX_SYNC_AUTH);
|
|
|
|
return WORK_DONE_DESTROY;
|
|
}
|
|
|
|
int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_auth_request *req)
|
|
{
|
|
const u8 *ssid;
|
|
struct ieee80211_work *wk;
|
|
u16 auth_alg;
|
|
|
|
if (req->local_state_change)
|
|
return 0; /* no need to update mac80211 state */
|
|
|
|
switch (req->auth_type) {
|
|
case NL80211_AUTHTYPE_OPEN_SYSTEM:
|
|
auth_alg = WLAN_AUTH_OPEN;
|
|
break;
|
|
case NL80211_AUTHTYPE_SHARED_KEY:
|
|
if (IS_ERR(sdata->local->wep_tx_tfm))
|
|
return -EOPNOTSUPP;
|
|
auth_alg = WLAN_AUTH_SHARED_KEY;
|
|
break;
|
|
case NL80211_AUTHTYPE_FT:
|
|
auth_alg = WLAN_AUTH_FT;
|
|
break;
|
|
case NL80211_AUTHTYPE_NETWORK_EAP:
|
|
auth_alg = WLAN_AUTH_LEAP;
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
|
|
if (!wk)
|
|
return -ENOMEM;
|
|
|
|
memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
|
|
|
|
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->probe_auth.key_len = req->key_len;
|
|
wk->probe_auth.key_idx = req->key_idx;
|
|
memcpy(wk->probe_auth.key, req->key, req->key_len);
|
|
}
|
|
|
|
ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
|
|
memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
|
|
wk->probe_auth.ssid_len = ssid[1];
|
|
|
|
wk->probe_auth.algorithm = auth_alg;
|
|
wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
|
|
|
|
/* if we already have a probe, don't probe again */
|
|
if (req->bss->proberesp_ies)
|
|
wk->type = IEEE80211_WORK_AUTH;
|
|
else
|
|
wk->type = IEEE80211_WORK_DIRECT_PROBE;
|
|
wk->chan = req->bss->channel;
|
|
wk->chan_type = NL80211_CHAN_NO_HT;
|
|
wk->sdata = sdata;
|
|
wk->done = ieee80211_probe_auth_done;
|
|
|
|
ieee80211_add_work(wk);
|
|
return 0;
|
|
}
|
|
|
|
/* create and insert a dummy station entry */
|
|
static int ieee80211_pre_assoc(struct ieee80211_sub_if_data *sdata,
|
|
u8 *bssid) {
|
|
struct sta_info *sta;
|
|
int err;
|
|
|
|
sta = sta_info_alloc(sdata, bssid, GFP_KERNEL);
|
|
if (!sta)
|
|
return -ENOMEM;
|
|
|
|
sta->dummy = true;
|
|
|
|
err = sta_info_insert(sta);
|
|
sta = NULL;
|
|
if (err) {
|
|
printk(KERN_DEBUG "%s: failed to insert Dummy STA entry for"
|
|
" the AP (error %d)\n", sdata->name, err);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_local *local = wk->sdata->local;
|
|
struct ieee80211_mgmt *mgmt;
|
|
struct ieee80211_rx_status *rx_status;
|
|
struct ieee802_11_elems elems;
|
|
struct cfg80211_bss *cbss = wk->assoc.bss;
|
|
u16 status;
|
|
|
|
if (!skb) {
|
|
sta_info_destroy_addr(wk->sdata, cbss->bssid);
|
|
cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
|
|
goto destroy;
|
|
}
|
|
|
|
if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
|
|
mutex_lock(&wk->sdata->u.mgd.mtx);
|
|
rx_status = (void *) skb->cb;
|
|
ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
|
|
ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
|
|
&elems, true);
|
|
mutex_unlock(&wk->sdata->u.mgd.mtx);
|
|
|
|
wk->type = IEEE80211_WORK_ASSOC;
|
|
/* not really done yet */
|
|
return WORK_DONE_REQUEUE;
|
|
}
|
|
|
|
mgmt = (void *)skb->data;
|
|
status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
|
|
|
|
if (status == WLAN_STATUS_SUCCESS) {
|
|
if (wk->assoc.synced)
|
|
drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
|
|
IEEE80211_TX_SYNC_ASSOC);
|
|
|
|
mutex_lock(&wk->sdata->u.mgd.mtx);
|
|
if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
|
|
mutex_unlock(&wk->sdata->u.mgd.mtx);
|
|
/* oops -- internal error -- send timeout for now */
|
|
sta_info_destroy_addr(wk->sdata, cbss->bssid);
|
|
cfg80211_send_assoc_timeout(wk->sdata->dev,
|
|
wk->filter_ta);
|
|
return WORK_DONE_DESTROY;
|
|
}
|
|
|
|
mutex_unlock(&wk->sdata->u.mgd.mtx);
|
|
} else {
|
|
/* assoc failed - destroy the dummy station entry */
|
|
sta_info_destroy_addr(wk->sdata, cbss->bssid);
|
|
}
|
|
|
|
cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
|
|
destroy:
|
|
if (wk->assoc.synced)
|
|
drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
|
|
IEEE80211_TX_SYNC_ASSOC);
|
|
|
|
return WORK_DONE_DESTROY;
|
|
}
|
|
|
|
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_bss *bss = (void *)req->bss->priv;
|
|
struct ieee80211_work *wk;
|
|
const u8 *ssid;
|
|
int i, err;
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
if (ifmgd->associated) {
|
|
if (!req->prev_bssid ||
|
|
memcmp(req->prev_bssid, ifmgd->associated->bssid,
|
|
ETH_ALEN)) {
|
|
/*
|
|
* We are already associated and the request was not a
|
|
* reassociation request from the current BSS, so
|
|
* reject it.
|
|
*/
|
|
mutex_unlock(&ifmgd->mtx);
|
|
return -EALREADY;
|
|
}
|
|
|
|
/* Trying to reassociate - clear previous association state */
|
|
ieee80211_set_disassoc(sdata, true, false);
|
|
}
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
|
|
if (!wk)
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
* create a dummy station info entry in order
|
|
* to start accepting incoming EAPOL packets from the station
|
|
*/
|
|
err = ieee80211_pre_assoc(sdata, req->bss->bssid);
|
|
if (err) {
|
|
kfree(wk);
|
|
return err;
|
|
}
|
|
|
|
ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
|
|
ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
|
|
|
|
ifmgd->beacon_crc_valid = false;
|
|
|
|
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;
|
|
|
|
|
|
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;
|
|
|
|
wk->assoc.bss = req->bss;
|
|
|
|
memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
|
|
|
|
/* new association always uses requested smps mode */
|
|
if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
|
|
if (ifmgd->powersave)
|
|
ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
|
|
else
|
|
ifmgd->ap_smps = IEEE80211_SMPS_OFF;
|
|
} else
|
|
ifmgd->ap_smps = ifmgd->req_smps;
|
|
|
|
wk->assoc.smps = ifmgd->ap_smps;
|
|
/*
|
|
* IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
|
|
* We still associate in non-HT mode (11a/b/g) if any one of these
|
|
* ciphers is configured as pairwise.
|
|
* We can set this to true for non-11n hardware, that'll be checked
|
|
* separately along with the peer capabilities.
|
|
*/
|
|
wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
|
|
wk->assoc.capability = req->bss->capability;
|
|
wk->assoc.wmm_used = bss->wmm_used;
|
|
wk->assoc.supp_rates = bss->supp_rates;
|
|
wk->assoc.supp_rates_len = bss->supp_rates_len;
|
|
wk->assoc.ht_information_ie =
|
|
ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
|
|
|
|
if (bss->wmm_used && bss->uapsd_supported &&
|
|
(sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
|
|
wk->assoc.uapsd_used = true;
|
|
ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
|
|
} else {
|
|
wk->assoc.uapsd_used = false;
|
|
ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
|
|
}
|
|
|
|
ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
|
|
memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
|
|
wk->assoc.ssid_len = ssid[1];
|
|
|
|
if (req->prev_bssid)
|
|
memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
|
|
|
|
wk->chan = req->bss->channel;
|
|
wk->chan_type = NL80211_CHAN_NO_HT;
|
|
wk->sdata = sdata;
|
|
wk->done = ieee80211_assoc_done;
|
|
if (!bss->dtim_period &&
|
|
sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
|
|
wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
|
|
else
|
|
wk->type = IEEE80211_WORK_ASSOC;
|
|
|
|
if (req->use_mfp) {
|
|
ifmgd->mfp = IEEE80211_MFP_REQUIRED;
|
|
ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
|
|
} else {
|
|
ifmgd->mfp = IEEE80211_MFP_DISABLED;
|
|
ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
|
|
}
|
|
|
|
if (req->crypto.control_port)
|
|
ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
|
|
else
|
|
ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
|
|
|
|
sdata->control_port_protocol = req->crypto.control_port_ethertype;
|
|
sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
|
|
|
|
ieee80211_add_work(wk);
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_deauth_request *req,
|
|
void *cookie)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_work *wk;
|
|
u8 bssid[ETH_ALEN];
|
|
bool assoc_bss = false;
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
|
|
memcpy(bssid, req->bss->bssid, ETH_ALEN);
|
|
if (ifmgd->associated == req->bss) {
|
|
ieee80211_set_disassoc(sdata, false, true);
|
|
mutex_unlock(&ifmgd->mtx);
|
|
assoc_bss = true;
|
|
} else {
|
|
bool not_auth_yet = false;
|
|
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
mutex_lock(&local->mtx);
|
|
list_for_each_entry(wk, &local->work_list, list) {
|
|
if (wk->sdata != sdata)
|
|
continue;
|
|
|
|
if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
|
|
wk->type != IEEE80211_WORK_AUTH &&
|
|
wk->type != IEEE80211_WORK_ASSOC &&
|
|
wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
|
|
continue;
|
|
|
|
if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
|
|
continue;
|
|
|
|
not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
|
|
list_del_rcu(&wk->list);
|
|
free_work(wk);
|
|
break;
|
|
}
|
|
mutex_unlock(&local->mtx);
|
|
|
|
/*
|
|
* If somebody requests authentication and we haven't
|
|
* sent out an auth frame yet there's no need to send
|
|
* out a deauth frame either. If the state was PROBE,
|
|
* then this is the case. If it's AUTH we have sent a
|
|
* frame, and if it's IDLE we have completed the auth
|
|
* process already.
|
|
*/
|
|
if (not_auth_yet) {
|
|
__cfg80211_auth_canceled(sdata->dev, bssid);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
|
|
sdata->name, bssid, req->reason_code);
|
|
|
|
ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
|
|
req->reason_code, cookie,
|
|
!req->local_state_change);
|
|
if (assoc_bss)
|
|
sta_info_flush(sdata->local, sdata);
|
|
|
|
mutex_lock(&sdata->local->mtx);
|
|
ieee80211_recalc_idle(sdata->local);
|
|
mutex_unlock(&sdata->local->mtx);
|
|
|
|
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;
|
|
u8 bssid[ETH_ALEN];
|
|
|
|
mutex_lock(&ifmgd->mtx);
|
|
|
|
/*
|
|
* cfg80211 should catch this ... but it's racy since
|
|
* we can receive a disassoc frame, process it, hand it
|
|
* to cfg80211 while that's in a locked section already
|
|
* trying to tell us that the user wants to disconnect.
|
|
*/
|
|
if (ifmgd->associated != req->bss) {
|
|
mutex_unlock(&ifmgd->mtx);
|
|
return -ENOLINK;
|
|
}
|
|
|
|
printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
|
|
sdata->name, req->bss->bssid, req->reason_code);
|
|
|
|
memcpy(bssid, req->bss->bssid, ETH_ALEN);
|
|
ieee80211_set_disassoc(sdata, false, true);
|
|
|
|
mutex_unlock(&ifmgd->mtx);
|
|
|
|
ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
|
|
IEEE80211_STYPE_DISASSOC, req->reason_code,
|
|
cookie, !req->local_state_change);
|
|
sta_info_flush(sdata->local, sdata);
|
|
|
|
mutex_lock(&sdata->local->mtx);
|
|
ieee80211_recalc_idle(sdata->local);
|
|
mutex_unlock(&sdata->local->mtx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
|
|
enum nl80211_cqm_rssi_threshold_event rssi_event,
|
|
gfp_t gfp)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
|
|
trace_api_cqm_rssi_notify(sdata, rssi_event);
|
|
|
|
cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
|
|
|
|
unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
return sdata->dev->operstate;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_get_operstate);
|