![Johannes Berg](/assets/img/avatar_default.png)
The time we wait for a probe response after probing an AP due to beacon loss is currently the same as the monitoring interval, 2s. This is far too long, APs should respond to probes within a fraction of that time. To be able to adjust both values, add a new constant IEEE80211_PROBE_WAIT, use it for checking the probe response, and adjust it down to 200ms instead of 2 seconds. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2389 lines
66 KiB
C
2389 lines
66 KiB
C
/*
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* BSS client mode implementation
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* Copyright 2003-2008, Jouni Malinen <j@w1.fi>
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* Copyright 2004, Instant802 Networks, Inc.
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* Copyright 2005, Devicescape Software, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/delay.h>
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#include <linux/if_ether.h>
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#include <linux/skbuff.h>
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#include <linux/if_arp.h>
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#include <linux/etherdevice.h>
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#include <linux/rtnetlink.h>
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#include <linux/pm_qos_params.h>
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#include <linux/crc32.h>
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#include <net/mac80211.h>
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#include <asm/unaligned.h>
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#include "ieee80211_i.h"
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#include "driver-ops.h"
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#include "rate.h"
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#include "led.h"
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#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
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#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
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#define IEEE80211_AUTH_MAX_TRIES 3
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#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
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#define IEEE80211_ASSOC_MAX_TRIES 3
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#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
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#define IEEE80211_PROBE_WAIT (HZ / 20)
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#define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
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#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
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/* utils */
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static int ecw2cw(int ecw)
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{
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return (1 << ecw) - 1;
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}
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static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
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{
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u8 *end, *pos;
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pos = bss->cbss.information_elements;
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if (pos == NULL)
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return NULL;
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end = pos + bss->cbss.len_information_elements;
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while (pos + 1 < end) {
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if (pos + 2 + pos[1] > end)
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break;
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if (pos[0] == ie)
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return pos;
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pos += 2 + pos[1];
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}
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return NULL;
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}
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static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
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struct ieee80211_supported_band *sband,
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u32 *rates)
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{
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int i, j, count;
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*rates = 0;
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count = 0;
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for (i = 0; i < bss->supp_rates_len; i++) {
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int rate = (bss->supp_rates[i] & 0x7F) * 5;
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for (j = 0; j < sband->n_bitrates; j++)
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if (sband->bitrates[j].bitrate == rate) {
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*rates |= BIT(j);
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count++;
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break;
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}
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}
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return count;
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}
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/*
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* ieee80211_enable_ht should be called only after the operating band
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* has been determined as ht configuration depends on the hw's
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* HT abilities for a specific band.
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*/
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static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_ht_info *hti,
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u16 ap_ht_cap_flags)
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{
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_supported_band *sband;
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struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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struct sta_info *sta;
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u32 changed = 0;
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u16 ht_opmode;
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bool enable_ht = true, ht_changed;
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enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
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sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
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/* HT is not supported */
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if (!sband->ht_cap.ht_supported)
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enable_ht = false;
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/* check that channel matches the right operating channel */
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if (local->hw.conf.channel->center_freq !=
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ieee80211_channel_to_frequency(hti->control_chan))
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enable_ht = false;
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if (enable_ht) {
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channel_type = NL80211_CHAN_HT20;
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if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
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(sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
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(hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
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switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
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case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
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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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channel_type = NL80211_CHAN_HT40MINUS;
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break;
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}
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}
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}
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ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
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channel_type != local->hw.conf.channel_type;
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local->oper_channel_type = channel_type;
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if (ht_changed) {
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/* channel_type change automatically detected */
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ieee80211_hw_config(local, 0);
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rcu_read_lock();
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sta = sta_info_get(local, ifmgd->bssid);
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if (sta)
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rate_control_rate_update(local, sband, sta,
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IEEE80211_RC_HT_CHANGED);
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rcu_read_unlock();
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}
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/* disable HT */
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if (!enable_ht)
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return 0;
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ht_opmode = le16_to_cpu(hti->operation_mode);
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/* if bss configuration changed store the new one */
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if (!sdata->ht_opmode_valid ||
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sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
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changed |= BSS_CHANGED_HT;
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sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
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sdata->ht_opmode_valid = true;
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}
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return changed;
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}
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/* frame sending functions */
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static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
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{
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struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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struct ieee80211_local *local = sdata->local;
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struct sk_buff *skb;
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struct ieee80211_mgmt *mgmt;
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u8 *pos, *ies, *ht_ie;
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int i, len, count, rates_len, supp_rates_len;
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u16 capab;
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struct ieee80211_bss *bss;
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int wmm = 0;
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struct ieee80211_supported_band *sband;
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u32 rates = 0;
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skb = dev_alloc_skb(local->hw.extra_tx_headroom +
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sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
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ifmgd->ssid_len);
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if (!skb) {
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printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
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"frame\n", sdata->dev->name);
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return;
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}
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skb_reserve(skb, local->hw.extra_tx_headroom);
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sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
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capab = ifmgd->capab;
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if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
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if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
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capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
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if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
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capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
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}
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bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
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local->hw.conf.channel->center_freq,
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ifmgd->ssid, ifmgd->ssid_len);
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if (bss) {
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if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
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capab |= WLAN_CAPABILITY_PRIVACY;
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if (bss->wmm_used)
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wmm = 1;
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/* get all rates supported by the device and the AP as
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* some APs don't like getting a superset of their rates
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* in the association request (e.g. D-Link DAP 1353 in
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* b-only mode) */
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rates_len = ieee80211_compatible_rates(bss, sband, &rates);
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if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
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(local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
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capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
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ieee80211_rx_bss_put(local, bss);
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} else {
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rates = ~0;
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rates_len = sband->n_bitrates;
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}
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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, ifmgd->bssid, ETH_ALEN);
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memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
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memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
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if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
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skb_put(skb, 10);
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mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
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IEEE80211_STYPE_REASSOC_REQ);
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mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
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mgmt->u.reassoc_req.listen_interval =
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cpu_to_le16(local->hw.conf.listen_interval);
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memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
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ETH_ALEN);
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} else {
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skb_put(skb, 4);
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mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
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IEEE80211_STYPE_ASSOC_REQ);
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mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
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mgmt->u.assoc_req.listen_interval =
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cpu_to_le16(local->hw.conf.listen_interval);
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}
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/* SSID */
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ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
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*pos++ = WLAN_EID_SSID;
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*pos++ = ifmgd->ssid_len;
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memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
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/* add all rates which were marked to be used above */
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supp_rates_len = rates_len;
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if (supp_rates_len > 8)
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supp_rates_len = 8;
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len = sband->n_bitrates;
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pos = skb_put(skb, supp_rates_len + 2);
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*pos++ = WLAN_EID_SUPP_RATES;
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*pos++ = supp_rates_len;
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count = 0;
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for (i = 0; i < sband->n_bitrates; i++) {
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if (BIT(i) & rates) {
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int rate = sband->bitrates[i].bitrate;
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*pos++ = (u8) (rate / 5);
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if (++count == 8)
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break;
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}
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}
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if (rates_len > count) {
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pos = skb_put(skb, rates_len - count + 2);
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*pos++ = WLAN_EID_EXT_SUPP_RATES;
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*pos++ = rates_len - count;
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for (i++; i < sband->n_bitrates; i++) {
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if (BIT(i) & rates) {
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int rate = sband->bitrates[i].bitrate;
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*pos++ = (u8) (rate / 5);
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}
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}
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}
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if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
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/* 1. power capabilities */
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pos = skb_put(skb, 4);
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*pos++ = WLAN_EID_PWR_CAPABILITY;
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*pos++ = 2;
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*pos++ = 0; /* min tx power */
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*pos++ = local->hw.conf.channel->max_power; /* max tx power */
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/* 2. supported channels */
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/* TODO: get this in reg domain format */
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pos = skb_put(skb, 2 * sband->n_channels + 2);
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*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
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*pos++ = 2 * sband->n_channels;
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for (i = 0; i < sband->n_channels; i++) {
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*pos++ = ieee80211_frequency_to_channel(
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sband->channels[i].center_freq);
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*pos++ = 1; /* one channel in the subband*/
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}
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}
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if (ifmgd->extra_ie) {
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pos = skb_put(skb, ifmgd->extra_ie_len);
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memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
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}
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if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
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pos = skb_put(skb, 9);
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*pos++ = WLAN_EID_VENDOR_SPECIFIC;
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*pos++ = 7; /* len */
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*pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
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*pos++ = 0x50;
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*pos++ = 0xf2;
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*pos++ = 2; /* WME */
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*pos++ = 0; /* WME info */
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*pos++ = 1; /* WME ver */
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*pos++ = 0;
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}
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/* wmm support is a must to HT */
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/*
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* IEEE802.11n does not allow TKIP/WEP as pairwise
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* ciphers in HT mode. We still associate in non-ht
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* mode (11a/b/g) if any one of these ciphers is
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* configured as pairwise.
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*/
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if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
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sband->ht_cap.ht_supported &&
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(ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
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ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
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(!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
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struct ieee80211_ht_info *ht_info =
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(struct ieee80211_ht_info *)(ht_ie + 2);
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u16 cap = sband->ht_cap.cap;
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__le16 tmp;
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u32 flags = local->hw.conf.channel->flags;
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switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
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case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
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if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
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cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
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cap &= ~IEEE80211_HT_CAP_SGI_40;
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}
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break;
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case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
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if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
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cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
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cap &= ~IEEE80211_HT_CAP_SGI_40;
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}
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break;
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}
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tmp = cpu_to_le16(cap);
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pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
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*pos++ = WLAN_EID_HT_CAPABILITY;
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*pos++ = sizeof(struct ieee80211_ht_cap);
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memset(pos, 0, sizeof(struct ieee80211_ht_cap));
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memcpy(pos, &tmp, sizeof(u16));
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pos += sizeof(u16);
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/* TODO: needs a define here for << 2 */
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*pos++ = sband->ht_cap.ampdu_factor |
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(sband->ht_cap.ampdu_density << 2);
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memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
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}
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kfree(ifmgd->assocreq_ies);
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ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
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ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
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if (ifmgd->assocreq_ies)
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memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
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ieee80211_tx_skb(sdata, skb, 0);
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}
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static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
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u16 stype, u16 reason)
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{
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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struct sk_buff *skb;
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struct ieee80211_mgmt *mgmt;
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skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
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if (!skb) {
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printk(KERN_DEBUG "%s: failed to allocate buffer for "
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"deauth/disassoc frame\n", sdata->dev->name);
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return;
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}
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skb_reserve(skb, local->hw.extra_tx_headroom);
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mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
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memset(mgmt, 0, 24);
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memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
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memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
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memcpy(mgmt->bssid, ifmgd->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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cfg80211_send_deauth(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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ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
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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_if_managed *ifmgd = &sdata->u.mgd;
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struct ieee80211_pspoll *pspoll;
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struct sk_buff *skb;
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u16 fc;
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skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
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if (!skb) {
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printk(KERN_DEBUG "%s: failed to allocate buffer for "
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"pspoll frame\n", sdata->dev->name);
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return;
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}
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skb_reserve(skb, local->hw.extra_tx_headroom);
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pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
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memset(pspoll, 0, sizeof(*pspoll));
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fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
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pspoll->frame_control = cpu_to_le16(fc);
|
|
pspoll->aid = cpu_to_le16(ifmgd->aid);
|
|
|
|
/* aid in PS-Poll has its two MSBs each set to 1 */
|
|
pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
|
|
|
|
memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
|
|
memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
|
|
|
|
ieee80211_tx_skb(sdata, skb, 0);
|
|
}
|
|
|
|
void ieee80211_send_nullfunc(struct ieee80211_local *local,
|
|
struct ieee80211_sub_if_data *sdata,
|
|
int powersave)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct ieee80211_hdr *nullfunc;
|
|
__le16 fc;
|
|
|
|
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
|
|
return;
|
|
|
|
skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
|
|
if (!skb) {
|
|
printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
|
|
"frame\n", sdata->dev->name);
|
|
return;
|
|
}
|
|
skb_reserve(skb, local->hw.extra_tx_headroom);
|
|
|
|
nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
|
|
memset(nullfunc, 0, 24);
|
|
fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
|
|
IEEE80211_FCTL_TODS);
|
|
if (powersave)
|
|
fc |= cpu_to_le16(IEEE80211_FCTL_PM);
|
|
nullfunc->frame_control = fc;
|
|
memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
|
|
memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
|
|
memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
|
|
|
|
ieee80211_tx_skb(sdata, skb, 0);
|
|
}
|
|
|
|
/* 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->hw_scanning || local->sw_scanning)
|
|
return;
|
|
|
|
if (conf->dynamic_ps_timeout > 0 &&
|
|
!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
|
|
mod_timer(&local->dynamic_ps_timer, jiffies +
|
|
msecs_to_jiffies(conf->dynamic_ps_timeout));
|
|
} else {
|
|
if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
|
|
ieee80211_send_nullfunc(local, sdata, 1);
|
|
conf->flags |= IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
|
}
|
|
}
|
|
|
|
static void ieee80211_change_ps(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_conf *conf = &local->hw.conf;
|
|
|
|
if (local->ps_sdata) {
|
|
if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED))
|
|
return;
|
|
|
|
ieee80211_enable_ps(local, local->ps_sdata);
|
|
} else if (conf->flags & IEEE80211_CONF_PS) {
|
|
conf->flags &= ~IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
|
del_timer_sync(&local->dynamic_ps_timer);
|
|
cancel_work_sync(&local->dynamic_ps_enable_work);
|
|
}
|
|
}
|
|
|
|
/* need to hold RTNL or interface lock */
|
|
void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata, *found = NULL;
|
|
int count = 0;
|
|
|
|
if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
|
|
local->ps_sdata = NULL;
|
|
return;
|
|
}
|
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (!netif_running(sdata->dev))
|
|
continue;
|
|
if (sdata->vif.type != NL80211_IFTYPE_STATION)
|
|
continue;
|
|
found = sdata;
|
|
count++;
|
|
}
|
|
|
|
if (count == 1 && found->u.mgd.powersave) {
|
|
s32 beaconint_us;
|
|
|
|
if (latency < 0)
|
|
latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
|
|
|
|
beaconint_us = ieee80211_tu_to_usec(
|
|
found->vif.bss_conf.beacon_int);
|
|
|
|
if (beaconint_us > latency) {
|
|
local->ps_sdata = NULL;
|
|
} else {
|
|
u8 dtimper = found->vif.bss_conf.dtim_period;
|
|
int maxslp = 1;
|
|
|
|
if (dtimper > 1)
|
|
maxslp = min_t(int, dtimper,
|
|
latency / beaconint_us);
|
|
|
|
local->hw.conf.max_sleep_period = maxslp;
|
|
local->ps_sdata = found;
|
|
}
|
|
} else {
|
|
local->ps_sdata = NULL;
|
|
}
|
|
|
|
ieee80211_change_ps(local);
|
|
}
|
|
|
|
void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_local *local =
|
|
container_of(work, struct ieee80211_local,
|
|
dynamic_ps_disable_work);
|
|
|
|
if (local->hw.conf.flags & IEEE80211_CONF_PS) {
|
|
local->hw.conf.flags &= ~IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
|
}
|
|
|
|
ieee80211_wake_queues_by_reason(&local->hw,
|
|
IEEE80211_QUEUE_STOP_REASON_PS);
|
|
}
|
|
|
|
void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_local *local =
|
|
container_of(work, struct ieee80211_local,
|
|
dynamic_ps_enable_work);
|
|
struct ieee80211_sub_if_data *sdata = local->ps_sdata;
|
|
|
|
/* can only happen when PS was just disabled anyway */
|
|
if (!sdata)
|
|
return;
|
|
|
|
if (local->hw.conf.flags & IEEE80211_CONF_PS)
|
|
return;
|
|
|
|
if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
|
|
ieee80211_send_nullfunc(local, sdata, 1);
|
|
|
|
local->hw.conf.flags |= IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
|
}
|
|
|
|
void ieee80211_dynamic_ps_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_local *local = (void *) data;
|
|
|
|
queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
|
|
}
|
|
|
|
/* MLME */
|
|
static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
|
|
struct ieee80211_if_managed *ifmgd,
|
|
u8 *wmm_param, size_t wmm_param_len)
|
|
{
|
|
struct ieee80211_tx_queue_params params;
|
|
size_t left;
|
|
int count;
|
|
u8 *pos;
|
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
|
|
return;
|
|
|
|
if (!wmm_param)
|
|
return;
|
|
|
|
if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
|
|
return;
|
|
count = wmm_param[6] & 0x0f;
|
|
if (count == ifmgd->wmm_last_param_set)
|
|
return;
|
|
ifmgd->wmm_last_param_set = count;
|
|
|
|
pos = wmm_param + 8;
|
|
left = wmm_param_len - 8;
|
|
|
|
memset(¶ms, 0, sizeof(params));
|
|
|
|
local->wmm_acm = 0;
|
|
for (; left >= 4; left -= 4, pos += 4) {
|
|
int aci = (pos[0] >> 5) & 0x03;
|
|
int acm = (pos[0] >> 4) & 0x01;
|
|
int queue;
|
|
|
|
switch (aci) {
|
|
case 1: /* AC_BK */
|
|
queue = 3;
|
|
if (acm)
|
|
local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
|
|
break;
|
|
case 2: /* AC_VI */
|
|
queue = 1;
|
|
if (acm)
|
|
local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
|
|
break;
|
|
case 3: /* AC_VO */
|
|
queue = 0;
|
|
if (acm)
|
|
local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
|
|
break;
|
|
case 0: /* AC_BE */
|
|
default:
|
|
queue = 2;
|
|
if (acm)
|
|
local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
|
|
break;
|
|
}
|
|
|
|
params.aifs = pos[0] & 0x0f;
|
|
params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
|
|
params.cw_min = ecw2cw(pos[1] & 0x0f);
|
|
params.txop = get_unaligned_le16(pos + 2);
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
|
|
"cWmin=%d cWmax=%d txop=%d\n",
|
|
local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
|
|
params.cw_max, params.txop);
|
|
#endif
|
|
if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx)
|
|
printk(KERN_DEBUG "%s: failed to set TX queue "
|
|
"parameters for queue %d\n", local->mdev->name,
|
|
queue);
|
|
}
|
|
}
|
|
|
|
static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
|
|
u16 capab, bool erp_valid, u8 erp)
|
|
{
|
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
#endif
|
|
u32 changed = 0;
|
|
bool use_protection;
|
|
bool use_short_preamble;
|
|
bool use_short_slot;
|
|
|
|
if (erp_valid) {
|
|
use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
|
|
use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
|
|
} else {
|
|
use_protection = false;
|
|
use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
|
|
}
|
|
|
|
use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
|
|
|
|
if (use_protection != bss_conf->use_cts_prot) {
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
if (net_ratelimit()) {
|
|
printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
|
|
sdata->dev->name,
|
|
use_protection ? "enabled" : "disabled",
|
|
ifmgd->bssid);
|
|
}
|
|
#endif
|
|
bss_conf->use_cts_prot = use_protection;
|
|
changed |= BSS_CHANGED_ERP_CTS_PROT;
|
|
}
|
|
|
|
if (use_short_preamble != bss_conf->use_short_preamble) {
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
if (net_ratelimit()) {
|
|
printk(KERN_DEBUG "%s: switched to %s barker preamble"
|
|
" (BSSID=%pM)\n",
|
|
sdata->dev->name,
|
|
use_short_preamble ? "short" : "long",
|
|
ifmgd->bssid);
|
|
}
|
|
#endif
|
|
bss_conf->use_short_preamble = use_short_preamble;
|
|
changed |= BSS_CHANGED_ERP_PREAMBLE;
|
|
}
|
|
|
|
if (use_short_slot != bss_conf->use_short_slot) {
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
if (net_ratelimit()) {
|
|
printk(KERN_DEBUG "%s: switched to %s slot time"
|
|
" (BSSID=%pM)\n",
|
|
sdata->dev->name,
|
|
use_short_slot ? "short" : "long",
|
|
ifmgd->bssid);
|
|
}
|
|
#endif
|
|
bss_conf->use_short_slot = use_short_slot;
|
|
changed |= BSS_CHANGED_ERP_SLOT;
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
union iwreq_data wrqu;
|
|
|
|
memset(&wrqu, 0, sizeof(wrqu));
|
|
if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
|
|
memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
|
|
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
|
|
wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
|
|
}
|
|
|
|
static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
char *buf;
|
|
size_t len;
|
|
int i;
|
|
union iwreq_data wrqu;
|
|
|
|
if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
|
|
return;
|
|
|
|
buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
|
|
ifmgd->assocresp_ies_len), GFP_KERNEL);
|
|
if (!buf)
|
|
return;
|
|
|
|
len = sprintf(buf, "ASSOCINFO(");
|
|
if (ifmgd->assocreq_ies) {
|
|
len += sprintf(buf + len, "ReqIEs=");
|
|
for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
|
|
len += sprintf(buf + len, "%02x",
|
|
ifmgd->assocreq_ies[i]);
|
|
}
|
|
}
|
|
if (ifmgd->assocresp_ies) {
|
|
if (ifmgd->assocreq_ies)
|
|
len += sprintf(buf + len, " ");
|
|
len += sprintf(buf + len, "RespIEs=");
|
|
for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
|
|
len += sprintf(buf + len, "%02x",
|
|
ifmgd->assocresp_ies[i]);
|
|
}
|
|
}
|
|
len += sprintf(buf + len, ")");
|
|
|
|
if (len > IW_CUSTOM_MAX) {
|
|
len = sprintf(buf, "ASSOCRESPIE=");
|
|
for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
|
|
len += sprintf(buf + len, "%02x",
|
|
ifmgd->assocresp_ies[i]);
|
|
}
|
|
}
|
|
|
|
if (len <= IW_CUSTOM_MAX) {
|
|
memset(&wrqu, 0, sizeof(wrqu));
|
|
wrqu.data.length = len;
|
|
wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
|
|
}
|
|
|
|
kfree(buf);
|
|
}
|
|
|
|
|
|
static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
|
|
u32 bss_info_changed)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_conf *conf = &local_to_hw(local)->conf;
|
|
|
|
struct ieee80211_bss *bss;
|
|
|
|
bss_info_changed |= BSS_CHANGED_ASSOC;
|
|
ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
|
|
|
|
bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
|
|
conf->channel->center_freq,
|
|
ifmgd->ssid, ifmgd->ssid_len);
|
|
if (bss) {
|
|
/* set timing information */
|
|
sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
|
|
sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
|
|
sdata->vif.bss_conf.dtim_period = bss->dtim_period;
|
|
|
|
bss_info_changed |= BSS_CHANGED_BEACON_INT;
|
|
bss_info_changed |= ieee80211_handle_bss_capability(sdata,
|
|
bss->cbss.capability, bss->has_erp_value, bss->erp_value);
|
|
|
|
cfg80211_hold_bss(&bss->cbss);
|
|
|
|
ieee80211_rx_bss_put(local, bss);
|
|
}
|
|
|
|
ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
|
|
memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
|
|
ieee80211_sta_send_associnfo(sdata);
|
|
|
|
ifmgd->last_probe = jiffies;
|
|
ieee80211_led_assoc(local, 1);
|
|
|
|
sdata->vif.bss_conf.assoc = 1;
|
|
/*
|
|
* For now just always ask the driver to update the basic rateset
|
|
* when we have associated, we aren't checking whether it actually
|
|
* changed or not.
|
|
*/
|
|
bss_info_changed |= BSS_CHANGED_BASIC_RATES;
|
|
ieee80211_bss_info_change_notify(sdata, bss_info_changed);
|
|
|
|
/* will be same as sdata */
|
|
if (local->ps_sdata) {
|
|
mutex_lock(&local->iflist_mtx);
|
|
ieee80211_recalc_ps(local, -1);
|
|
mutex_unlock(&local->iflist_mtx);
|
|
}
|
|
|
|
netif_tx_start_all_queues(sdata->dev);
|
|
netif_carrier_on(sdata->dev);
|
|
|
|
ieee80211_sta_send_apinfo(sdata);
|
|
}
|
|
|
|
static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
ifmgd->direct_probe_tries++;
|
|
if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
|
|
printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
|
|
sdata->dev->name, ifmgd->bssid);
|
|
ifmgd->state = IEEE80211_STA_MLME_DISABLED;
|
|
ieee80211_recalc_idle(local);
|
|
cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
|
|
|
|
/*
|
|
* Most likely AP is not in the range so remove the
|
|
* bss information associated to the AP
|
|
*/
|
|
ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
|
|
sdata->local->hw.conf.channel->center_freq,
|
|
ifmgd->ssid, ifmgd->ssid_len);
|
|
|
|
/*
|
|
* We might have a pending scan which had no chance to run yet
|
|
* due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
|
|
* Hence, queue the STAs work again
|
|
*/
|
|
queue_work(local->hw.workqueue, &ifmgd->work);
|
|
return;
|
|
}
|
|
|
|
printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
|
|
sdata->dev->name, ifmgd->bssid,
|
|
ifmgd->direct_probe_tries);
|
|
|
|
ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
|
|
|
|
/* Direct probe is sent to broadcast address as some APs
|
|
* will not answer to direct packet in unassociated state.
|
|
*/
|
|
ieee80211_send_probe_req(sdata, NULL,
|
|
ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
|
|
|
|
mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
|
|
}
|
|
|
|
|
|
static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
u8 *ies;
|
|
size_t ies_len;
|
|
|
|
ifmgd->auth_tries++;
|
|
if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
|
|
printk(KERN_DEBUG "%s: authentication with AP %pM"
|
|
" timed out\n",
|
|
sdata->dev->name, ifmgd->bssid);
|
|
ifmgd->state = IEEE80211_STA_MLME_DISABLED;
|
|
ieee80211_recalc_idle(local);
|
|
cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
|
|
ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
|
|
sdata->local->hw.conf.channel->center_freq,
|
|
ifmgd->ssid, ifmgd->ssid_len);
|
|
|
|
/*
|
|
* We might have a pending scan which had no chance to run yet
|
|
* due to state == IEEE80211_STA_MLME_AUTHENTICATE.
|
|
* Hence, queue the STAs work again
|
|
*/
|
|
queue_work(local->hw.workqueue, &ifmgd->work);
|
|
return;
|
|
}
|
|
|
|
ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
|
|
printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
|
|
sdata->dev->name, ifmgd->bssid);
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
|
|
ies = ifmgd->sme_auth_ie;
|
|
ies_len = ifmgd->sme_auth_ie_len;
|
|
} else {
|
|
ies = NULL;
|
|
ies_len = 0;
|
|
}
|
|
ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
|
|
ifmgd->bssid, 0);
|
|
ifmgd->auth_transaction = 2;
|
|
|
|
mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
|
|
}
|
|
|
|
/*
|
|
* The disassoc 'reason' argument can be either our own reason
|
|
* if self disconnected or a reason code from the AP.
|
|
*/
|
|
static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
|
|
bool deauth, bool self_disconnected,
|
|
u16 reason)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_conf *conf = &local_to_hw(local)->conf;
|
|
struct ieee80211_bss *bss;
|
|
struct sta_info *sta;
|
|
u32 changed = 0, config_changed = 0;
|
|
|
|
rcu_read_lock();
|
|
|
|
sta = sta_info_get(local, ifmgd->bssid);
|
|
if (!sta) {
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
|
|
if (deauth) {
|
|
ifmgd->direct_probe_tries = 0;
|
|
ifmgd->auth_tries = 0;
|
|
}
|
|
ifmgd->assoc_scan_tries = 0;
|
|
ifmgd->assoc_tries = 0;
|
|
|
|
netif_tx_stop_all_queues(sdata->dev);
|
|
netif_carrier_off(sdata->dev);
|
|
|
|
ieee80211_sta_tear_down_BA_sessions(sta);
|
|
|
|
bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
|
|
conf->channel->center_freq,
|
|
ifmgd->ssid, ifmgd->ssid_len);
|
|
|
|
if (bss) {
|
|
cfg80211_unhold_bss(&bss->cbss);
|
|
ieee80211_rx_bss_put(local, bss);
|
|
}
|
|
|
|
if (self_disconnected) {
|
|
if (deauth)
|
|
ieee80211_send_deauth_disassoc(sdata,
|
|
IEEE80211_STYPE_DEAUTH, reason);
|
|
else
|
|
ieee80211_send_deauth_disassoc(sdata,
|
|
IEEE80211_STYPE_DISASSOC, reason);
|
|
}
|
|
|
|
ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
|
|
changed |= ieee80211_reset_erp_info(sdata);
|
|
|
|
ieee80211_led_assoc(local, 0);
|
|
changed |= BSS_CHANGED_ASSOC;
|
|
sdata->vif.bss_conf.assoc = false;
|
|
|
|
ieee80211_sta_send_apinfo(sdata);
|
|
|
|
if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
|
|
ifmgd->state = IEEE80211_STA_MLME_DISABLED;
|
|
ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
|
|
sdata->local->hw.conf.channel->center_freq,
|
|
ifmgd->ssid, ifmgd->ssid_len);
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
ieee80211_set_wmm_default(sdata);
|
|
|
|
ieee80211_recalc_idle(local);
|
|
|
|
/* channel(_type) changes are handled by ieee80211_hw_config */
|
|
local->oper_channel_type = NL80211_CHAN_NO_HT;
|
|
|
|
/* on the next assoc, re-program HT parameters */
|
|
sdata->ht_opmode_valid = false;
|
|
|
|
local->power_constr_level = 0;
|
|
|
|
del_timer_sync(&local->dynamic_ps_timer);
|
|
cancel_work_sync(&local->dynamic_ps_enable_work);
|
|
|
|
if (local->hw.conf.flags & IEEE80211_CONF_PS) {
|
|
local->hw.conf.flags &= ~IEEE80211_CONF_PS;
|
|
config_changed |= IEEE80211_CONF_CHANGE_PS;
|
|
}
|
|
|
|
ieee80211_hw_config(local, config_changed);
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
|
|
rcu_read_lock();
|
|
|
|
sta = sta_info_get(local, ifmgd->bssid);
|
|
if (!sta) {
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
|
|
sta_info_unlink(&sta);
|
|
|
|
rcu_read_unlock();
|
|
|
|
sta_info_destroy(sta);
|
|
}
|
|
|
|
static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
if (!sdata || !sdata->default_key ||
|
|
sdata->default_key->conf.alg != ALG_WEP)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_bss *bss;
|
|
int bss_privacy;
|
|
int wep_privacy;
|
|
int privacy_invoked;
|
|
|
|
if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
|
|
return 0;
|
|
|
|
bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
|
|
local->hw.conf.channel->center_freq,
|
|
ifmgd->ssid, ifmgd->ssid_len);
|
|
if (!bss)
|
|
return 0;
|
|
|
|
bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
|
|
wep_privacy = !!ieee80211_sta_wep_configured(sdata);
|
|
privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
|
|
|
|
ieee80211_rx_bss_put(local, bss);
|
|
|
|
if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
ifmgd->assoc_tries++;
|
|
if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
|
|
printk(KERN_DEBUG "%s: association with AP %pM"
|
|
" timed out\n",
|
|
sdata->dev->name, ifmgd->bssid);
|
|
ifmgd->state = IEEE80211_STA_MLME_DISABLED;
|
|
ieee80211_recalc_idle(local);
|
|
cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
|
|
ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
|
|
sdata->local->hw.conf.channel->center_freq,
|
|
ifmgd->ssid, ifmgd->ssid_len);
|
|
/*
|
|
* We might have a pending scan which had no chance to run yet
|
|
* due to state == IEEE80211_STA_MLME_ASSOCIATE.
|
|
* Hence, queue the STAs work again
|
|
*/
|
|
queue_work(local->hw.workqueue, &ifmgd->work);
|
|
return;
|
|
}
|
|
|
|
ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
|
|
printk(KERN_DEBUG "%s: associate with AP %pM\n",
|
|
sdata->dev->name, ifmgd->bssid);
|
|
if (ieee80211_privacy_mismatch(sdata)) {
|
|
printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
|
|
"mixed-cell disabled - abort association\n", sdata->dev->name);
|
|
ifmgd->state = IEEE80211_STA_MLME_DISABLED;
|
|
ieee80211_recalc_idle(local);
|
|
return;
|
|
}
|
|
|
|
ieee80211_send_assoc(sdata);
|
|
|
|
mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
|
|
}
|
|
|
|
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 periodical probe request to
|
|
* the AP.
|
|
*/
|
|
if (!is_multicast_ether_addr(hdr->addr1))
|
|
mod_timer(&sdata->u.mgd.timer,
|
|
jiffies + IEEE80211_MONITORING_INTERVAL);
|
|
}
|
|
|
|
void ieee80211_beacon_loss_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
container_of(work, struct ieee80211_sub_if_data,
|
|
u.mgd.beacon_loss_work);
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
/*
|
|
* The driver has already reported this event and we have
|
|
* already sent a probe request. Maybe the AP died and the
|
|
* driver keeps reporting until we disassociate... We have
|
|
* to ignore that because otherwise we would continually
|
|
* reset the timer and never check whether we received a
|
|
* probe response!
|
|
*/
|
|
if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
|
|
return;
|
|
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
if (net_ratelimit()) {
|
|
printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
|
|
"- sending probe request\n", sdata->dev->name,
|
|
sdata->u.mgd.bssid);
|
|
}
|
|
#endif
|
|
|
|
ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
|
|
ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
|
|
ifmgd->ssid_len, NULL, 0);
|
|
|
|
mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
|
|
}
|
|
|
|
void ieee80211_beacon_loss(struct ieee80211_vif *vif)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
|
|
queue_work(sdata->local->hw.workqueue,
|
|
&sdata->u.mgd.beacon_loss_work);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_beacon_loss);
|
|
|
|
static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sta_info *sta;
|
|
bool disassoc = false;
|
|
|
|
/* TODO: start monitoring current AP signal quality and number of
|
|
* missed beacons. Scan other channels every now and then and search
|
|
* for better APs. */
|
|
/* TODO: remove expired BSSes */
|
|
|
|
ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
|
|
|
|
rcu_read_lock();
|
|
|
|
sta = sta_info_get(local, ifmgd->bssid);
|
|
if (!sta) {
|
|
printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
|
|
sdata->dev->name, ifmgd->bssid);
|
|
disassoc = true;
|
|
goto unlock;
|
|
}
|
|
|
|
if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
|
|
time_after(jiffies, sta->last_rx + IEEE80211_PROBE_WAIT)) {
|
|
printk(KERN_DEBUG "%s: no probe response from AP %pM "
|
|
"- disassociating\n",
|
|
sdata->dev->name, ifmgd->bssid);
|
|
disassoc = true;
|
|
ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
|
|
goto unlock;
|
|
}
|
|
|
|
/*
|
|
* Beacon filtering is only enabled with power save and then the
|
|
* stack should not check for beacon loss.
|
|
*/
|
|
if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
|
|
(local->hw.conf.flags & IEEE80211_CONF_PS)) &&
|
|
time_after(jiffies,
|
|
ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
if (net_ratelimit()) {
|
|
printk(KERN_DEBUG "%s: beacon loss from AP %pM "
|
|
"- sending probe request\n",
|
|
sdata->dev->name, ifmgd->bssid);
|
|
}
|
|
#endif
|
|
ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
|
|
ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
|
|
ifmgd->ssid_len, NULL, 0);
|
|
goto unlock;
|
|
|
|
}
|
|
|
|
if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
|
|
ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
|
|
ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
|
|
ifmgd->ssid_len, NULL, 0);
|
|
}
|
|
|
|
unlock:
|
|
rcu_read_unlock();
|
|
|
|
if (disassoc)
|
|
ieee80211_set_disassoc(sdata, true, true,
|
|
WLAN_REASON_PREV_AUTH_NOT_VALID);
|
|
else
|
|
mod_timer(&ifmgd->timer, jiffies +
|
|
IEEE80211_MONITORING_INTERVAL);
|
|
}
|
|
|
|
|
|
static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
|
|
ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
|
|
if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
|
|
/* Wait for SME to request association */
|
|
ifmgd->state = IEEE80211_STA_MLME_DISABLED;
|
|
ieee80211_recalc_idle(sdata->local);
|
|
} else
|
|
ieee80211_associate(sdata);
|
|
}
|
|
|
|
|
|
static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len)
|
|
{
|
|
u8 *pos;
|
|
struct ieee802_11_elems elems;
|
|
|
|
pos = mgmt->u.auth.variable;
|
|
ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
|
|
if (!elems.challenge)
|
|
return;
|
|
ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
|
|
elems.challenge - 2, elems.challenge_len + 2,
|
|
sdata->u.mgd.bssid, 1);
|
|
sdata->u.mgd.auth_transaction = 4;
|
|
}
|
|
|
|
static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
u16 auth_alg, auth_transaction, status_code;
|
|
|
|
if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
|
|
return;
|
|
|
|
if (len < 24 + 6)
|
|
return;
|
|
|
|
if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
|
|
return;
|
|
|
|
if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
|
|
return;
|
|
|
|
auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
|
|
auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
|
|
status_code = le16_to_cpu(mgmt->u.auth.status_code);
|
|
|
|
if (auth_alg != ifmgd->auth_alg ||
|
|
auth_transaction != ifmgd->auth_transaction)
|
|
return;
|
|
|
|
if (status_code != WLAN_STATUS_SUCCESS) {
|
|
if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
|
|
u8 algs[3];
|
|
const int num_algs = ARRAY_SIZE(algs);
|
|
int i, pos;
|
|
algs[0] = algs[1] = algs[2] = 0xff;
|
|
if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
|
|
algs[0] = WLAN_AUTH_OPEN;
|
|
if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
|
|
algs[1] = WLAN_AUTH_SHARED_KEY;
|
|
if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
|
|
algs[2] = WLAN_AUTH_LEAP;
|
|
if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
|
|
pos = 0;
|
|
else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
|
|
pos = 1;
|
|
else
|
|
pos = 2;
|
|
for (i = 0; i < num_algs; i++) {
|
|
pos++;
|
|
if (pos >= num_algs)
|
|
pos = 0;
|
|
if (algs[pos] == ifmgd->auth_alg ||
|
|
algs[pos] == 0xff)
|
|
continue;
|
|
if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
|
|
!ieee80211_sta_wep_configured(sdata))
|
|
continue;
|
|
ifmgd->auth_alg = algs[pos];
|
|
break;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
switch (ifmgd->auth_alg) {
|
|
case WLAN_AUTH_OPEN:
|
|
case WLAN_AUTH_LEAP:
|
|
case WLAN_AUTH_FT:
|
|
ieee80211_auth_completed(sdata);
|
|
cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
|
|
break;
|
|
case WLAN_AUTH_SHARED_KEY:
|
|
if (ifmgd->auth_transaction == 4) {
|
|
ieee80211_auth_completed(sdata);
|
|
cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
|
|
} else
|
|
ieee80211_auth_challenge(sdata, mgmt, len);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static void 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;
|
|
u16 reason_code;
|
|
|
|
if (len < 24 + 2)
|
|
return;
|
|
|
|
if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
|
|
return;
|
|
|
|
reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
|
|
printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
|
|
sdata->dev->name, reason_code);
|
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
|
|
(ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
|
|
ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
|
|
ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
|
|
ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
|
|
mod_timer(&ifmgd->timer, jiffies +
|
|
IEEE80211_RETRY_AUTH_INTERVAL);
|
|
}
|
|
|
|
ieee80211_set_disassoc(sdata, true, false, 0);
|
|
ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
|
|
cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
|
|
}
|
|
|
|
|
|
static void 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;
|
|
|
|
if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
|
|
return;
|
|
|
|
reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
|
|
printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
|
|
sdata->dev->name, reason_code);
|
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
|
|
ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
|
|
ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
|
|
mod_timer(&ifmgd->timer, jiffies +
|
|
IEEE80211_RETRY_AUTH_INTERVAL);
|
|
}
|
|
|
|
ieee80211_set_disassoc(sdata, false, false, reason_code);
|
|
cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
|
|
}
|
|
|
|
|
|
static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len,
|
|
int reassoc)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_supported_band *sband;
|
|
struct sta_info *sta;
|
|
u32 rates, basic_rates;
|
|
u16 capab_info, status_code, aid;
|
|
struct ieee802_11_elems elems;
|
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
|
|
u8 *pos;
|
|
u32 changed = 0;
|
|
int i, j;
|
|
bool have_higher_than_11mbit = false, newsta = false;
|
|
u16 ap_ht_cap_flags;
|
|
|
|
/* AssocResp and ReassocResp have identical structure, so process both
|
|
* of them in this function. */
|
|
|
|
if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
|
|
return;
|
|
|
|
if (len < 24 + 6)
|
|
return;
|
|
|
|
if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
|
|
return;
|
|
|
|
capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
|
|
status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
|
|
aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
|
|
|
|
printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
|
|
"status=%d aid=%d)\n",
|
|
sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
|
|
capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
|
|
|
|
pos = mgmt->u.assoc_resp.variable;
|
|
ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
|
|
|
|
if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
|
|
elems.timeout_int && elems.timeout_int_len == 5 &&
|
|
elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
|
|
u32 tu, ms;
|
|
tu = get_unaligned_le32(elems.timeout_int + 1);
|
|
ms = tu * 1024 / 1000;
|
|
printk(KERN_DEBUG "%s: AP rejected association temporarily; "
|
|
"comeback duration %u TU (%u ms)\n",
|
|
sdata->dev->name, tu, ms);
|
|
if (ms > IEEE80211_ASSOC_TIMEOUT)
|
|
mod_timer(&ifmgd->timer,
|
|
jiffies + msecs_to_jiffies(ms));
|
|
return;
|
|
}
|
|
|
|
if (status_code != WLAN_STATUS_SUCCESS) {
|
|
printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
|
|
sdata->dev->name, status_code);
|
|
/* if this was a reassociation, ensure we try a "full"
|
|
* association next time. This works around some broken APs
|
|
* which do not correctly reject reassociation requests. */
|
|
ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
|
|
cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
|
|
if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
|
|
/* Wait for SME to decide what to do next */
|
|
ifmgd->state = IEEE80211_STA_MLME_DISABLED;
|
|
ieee80211_recalc_idle(local);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
|
|
printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
|
|
"set\n", sdata->dev->name, aid);
|
|
aid &= ~(BIT(15) | BIT(14));
|
|
|
|
if (!elems.supp_rates) {
|
|
printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
|
|
sdata->dev->name);
|
|
return;
|
|
}
|
|
|
|
printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
|
|
ifmgd->aid = aid;
|
|
ifmgd->ap_capab = capab_info;
|
|
|
|
kfree(ifmgd->assocresp_ies);
|
|
ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
|
|
ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
|
|
if (ifmgd->assocresp_ies)
|
|
memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
|
|
|
|
rcu_read_lock();
|
|
|
|
/* Add STA entry for the AP */
|
|
sta = sta_info_get(local, ifmgd->bssid);
|
|
if (!sta) {
|
|
newsta = true;
|
|
|
|
sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
|
|
if (!sta) {
|
|
printk(KERN_DEBUG "%s: failed to alloc STA entry for"
|
|
" the AP\n", sdata->dev->name);
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
|
|
/* update new sta with its last rx activity */
|
|
sta->last_rx = jiffies;
|
|
}
|
|
|
|
/*
|
|
* FIXME: Do we really need to update the sta_info's information here?
|
|
* We already know about the AP (we found it in our list) so it
|
|
* should already be filled with the right info, no?
|
|
* As is stands, all this is racy because typically we assume
|
|
* the information that is filled in here (except flags) doesn't
|
|
* change while a STA structure is alive. As such, it should move
|
|
* to between the sta_info_alloc() and sta_info_insert() above.
|
|
*/
|
|
|
|
set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP);
|
|
if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
|
|
set_sta_flags(sta, WLAN_STA_AUTHORIZED);
|
|
|
|
rates = 0;
|
|
basic_rates = 0;
|
|
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
|
|
|
for (i = 0; i < elems.supp_rates_len; i++) {
|
|
int rate = (elems.supp_rates[i] & 0x7f) * 5;
|
|
bool is_basic = !!(elems.supp_rates[i] & 0x80);
|
|
|
|
if (rate > 110)
|
|
have_higher_than_11mbit = true;
|
|
|
|
for (j = 0; j < sband->n_bitrates; j++) {
|
|
if (sband->bitrates[j].bitrate == rate) {
|
|
rates |= BIT(j);
|
|
if (is_basic)
|
|
basic_rates |= BIT(j);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < elems.ext_supp_rates_len; i++) {
|
|
int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
|
|
bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
|
|
|
|
if (rate > 110)
|
|
have_higher_than_11mbit = true;
|
|
|
|
for (j = 0; j < sband->n_bitrates; j++) {
|
|
if (sband->bitrates[j].bitrate == rate) {
|
|
rates |= BIT(j);
|
|
if (is_basic)
|
|
basic_rates |= BIT(j);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
|
|
sdata->vif.bss_conf.basic_rates = basic_rates;
|
|
|
|
/* cf. IEEE 802.11 9.2.12 */
|
|
if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
|
|
have_higher_than_11mbit)
|
|
sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
|
|
else
|
|
sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
|
|
|
|
/* If TKIP/WEP is used, no need to parse AP's HT capabilities */
|
|
if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
|
|
ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
|
|
elems.ht_cap_elem, &sta->sta.ht_cap);
|
|
|
|
ap_ht_cap_flags = sta->sta.ht_cap.cap;
|
|
|
|
rate_control_rate_init(sta);
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
|
|
set_sta_flags(sta, WLAN_STA_MFP);
|
|
|
|
if (elems.wmm_param)
|
|
set_sta_flags(sta, WLAN_STA_WME);
|
|
|
|
if (newsta) {
|
|
int err = sta_info_insert(sta);
|
|
if (err) {
|
|
printk(KERN_DEBUG "%s: failed to insert STA entry for"
|
|
" the AP (error %d)\n", sdata->dev->name, err);
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
if (elems.wmm_param)
|
|
ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
|
|
elems.wmm_param_len);
|
|
else
|
|
ieee80211_set_wmm_default(sdata);
|
|
|
|
if (elems.ht_info_elem && elems.wmm_param &&
|
|
(ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
|
|
!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
|
|
changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
|
|
ap_ht_cap_flags);
|
|
|
|
/* 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, changed);
|
|
|
|
/*
|
|
* initialise the time of last beacon to be the association time,
|
|
* otherwise beacon loss check will trigger immediately
|
|
*/
|
|
ifmgd->last_beacon = jiffies;
|
|
|
|
ieee80211_associated(sdata);
|
|
cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
|
|
}
|
|
|
|
|
|
static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len,
|
|
struct ieee80211_rx_status *rx_status,
|
|
struct ieee802_11_elems *elems,
|
|
bool beacon)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
int freq;
|
|
struct ieee80211_bss *bss;
|
|
struct ieee80211_channel *channel;
|
|
|
|
if (elems->ds_params && elems->ds_params_len == 1)
|
|
freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
|
|
else
|
|
freq = rx_status->freq;
|
|
|
|
channel = ieee80211_get_channel(local->hw.wiphy, freq);
|
|
|
|
if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
|
|
return;
|
|
|
|
bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
|
|
channel, beacon);
|
|
if (!bss)
|
|
return;
|
|
|
|
if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
|
|
(memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
|
|
struct ieee80211_channel_sw_ie *sw_elem =
|
|
(struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
|
|
ieee80211_process_chanswitch(sdata, sw_elem, bss);
|
|
}
|
|
|
|
ieee80211_rx_bss_put(local, bss);
|
|
}
|
|
|
|
|
|
static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len,
|
|
struct ieee80211_rx_status *rx_status)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd;
|
|
size_t baselen;
|
|
struct ieee802_11_elems elems;
|
|
|
|
ifmgd = &sdata->u.mgd;
|
|
|
|
if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
|
|
return; /* ignore ProbeResp to foreign address */
|
|
|
|
baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
|
|
if (baselen > len)
|
|
return;
|
|
|
|
ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
|
|
&elems);
|
|
|
|
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
|
|
|
|
/* direct probe may be part of the association flow */
|
|
if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
|
|
printk(KERN_DEBUG "%s direct probe responded\n",
|
|
sdata->dev->name);
|
|
ieee80211_authenticate(sdata);
|
|
}
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
|
|
ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
|
|
}
|
|
|
|
/*
|
|
* This is the canonical list of information elements we care about,
|
|
* the filter code also gives us all changes to the Microsoft OUI
|
|
* (00:50:F2) vendor IE which is used for WMM which we need to track.
|
|
*
|
|
* We implement beacon filtering in software since that means we can
|
|
* avoid processing the frame here and in cfg80211, and userspace
|
|
* will not be able to tell whether the hardware supports it or not.
|
|
*
|
|
* XXX: This list needs to be dynamic -- userspace needs to be able to
|
|
* add items it requires. It also needs to be able to tell us to
|
|
* look out for other vendor IEs.
|
|
*/
|
|
static const u64 care_about_ies =
|
|
(1ULL << WLAN_EID_COUNTRY) |
|
|
(1ULL << WLAN_EID_ERP_INFO) |
|
|
(1ULL << WLAN_EID_CHANNEL_SWITCH) |
|
|
(1ULL << WLAN_EID_PWR_CONSTRAINT) |
|
|
(1ULL << WLAN_EID_HT_CAPABILITY) |
|
|
(1ULL << WLAN_EID_HT_INFORMATION);
|
|
|
|
static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len,
|
|
struct ieee80211_rx_status *rx_status)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
size_t baselen;
|
|
struct ieee802_11_elems elems;
|
|
struct ieee80211_local *local = sdata->local;
|
|
u32 changed = 0;
|
|
bool erp_valid, directed_tim = false;
|
|
u8 erp_value = 0;
|
|
u32 ncrc;
|
|
|
|
/* 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;
|
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
|
|
memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
|
|
return;
|
|
|
|
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);
|
|
|
|
ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim));
|
|
|
|
if (ncrc == ifmgd->beacon_crc)
|
|
return;
|
|
ifmgd->beacon_crc = ncrc;
|
|
|
|
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
|
|
|
|
ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
|
|
elems.wmm_param_len);
|
|
|
|
if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
|
|
if (directed_tim) {
|
|
if (local->hw.conf.dynamic_ps_timeout > 0) {
|
|
local->hw.conf.flags &= ~IEEE80211_CONF_PS;
|
|
ieee80211_hw_config(local,
|
|
IEEE80211_CONF_CHANGE_PS);
|
|
ieee80211_send_nullfunc(local, sdata, 0);
|
|
} else {
|
|
local->pspolling = true;
|
|
|
|
/*
|
|
* Here is assumed that the driver will be
|
|
* able to send ps-poll frame and receive a
|
|
* response even though power save mode is
|
|
* enabled, but some drivers might require
|
|
* to disable power save here. This needs
|
|
* to be investigated.
|
|
*/
|
|
ieee80211_send_pspoll(local, sdata);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (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_TKIP_WEP_USED)) {
|
|
struct sta_info *sta;
|
|
struct ieee80211_supported_band *sband;
|
|
u16 ap_ht_cap_flags;
|
|
|
|
rcu_read_lock();
|
|
|
|
sta = sta_info_get(local, ifmgd->bssid);
|
|
if (!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,
|
|
ap_ht_cap_flags);
|
|
}
|
|
|
|
if (elems.country_elem) {
|
|
/* Note we are only reviewing this on beacons
|
|
* for the BSSID we are associated to */
|
|
regulatory_hint_11d(local->hw.wiphy,
|
|
elems.country_elem, elems.country_elem_len);
|
|
|
|
/* TODO: IBSS also needs this */
|
|
if (elems.pwr_constr_elem)
|
|
ieee80211_handle_pwr_constr(sdata,
|
|
le16_to_cpu(mgmt->u.probe_resp.capab_info),
|
|
elems.pwr_constr_elem,
|
|
elems.pwr_constr_elem_len);
|
|
}
|
|
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
}
|
|
|
|
ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_rx_status *rx_status)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_mgmt *mgmt;
|
|
u16 fc;
|
|
|
|
if (skb->len < 24)
|
|
return RX_DROP_MONITOR;
|
|
|
|
mgmt = (struct ieee80211_mgmt *) skb->data;
|
|
fc = le16_to_cpu(mgmt->frame_control);
|
|
|
|
switch (fc & IEEE80211_FCTL_STYPE) {
|
|
case IEEE80211_STYPE_PROBE_REQ:
|
|
case IEEE80211_STYPE_PROBE_RESP:
|
|
case IEEE80211_STYPE_BEACON:
|
|
memcpy(skb->cb, rx_status, sizeof(*rx_status));
|
|
case IEEE80211_STYPE_AUTH:
|
|
case IEEE80211_STYPE_ASSOC_RESP:
|
|
case IEEE80211_STYPE_REASSOC_RESP:
|
|
case IEEE80211_STYPE_DEAUTH:
|
|
case IEEE80211_STYPE_DISASSOC:
|
|
skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
|
|
queue_work(local->hw.workqueue, &sdata->u.mgd.work);
|
|
return RX_QUEUED;
|
|
}
|
|
|
|
return RX_DROP_MONITOR;
|
|
}
|
|
|
|
static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_rx_status *rx_status;
|
|
struct ieee80211_mgmt *mgmt;
|
|
u16 fc;
|
|
|
|
rx_status = (struct ieee80211_rx_status *) skb->cb;
|
|
mgmt = (struct ieee80211_mgmt *) skb->data;
|
|
fc = le16_to_cpu(mgmt->frame_control);
|
|
|
|
switch (fc & IEEE80211_FCTL_STYPE) {
|
|
case IEEE80211_STYPE_PROBE_RESP:
|
|
ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
|
|
rx_status);
|
|
break;
|
|
case IEEE80211_STYPE_BEACON:
|
|
ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
|
|
rx_status);
|
|
break;
|
|
case IEEE80211_STYPE_AUTH:
|
|
ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
|
|
break;
|
|
case IEEE80211_STYPE_ASSOC_RESP:
|
|
ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
|
|
break;
|
|
case IEEE80211_STYPE_REASSOC_RESP:
|
|
ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
|
|
break;
|
|
case IEEE80211_STYPE_DEAUTH:
|
|
ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
|
|
break;
|
|
case IEEE80211_STYPE_DISASSOC:
|
|
ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
|
|
break;
|
|
}
|
|
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
static void ieee80211_sta_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
(struct ieee80211_sub_if_data *) data;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
|
|
queue_work(local->hw.workqueue, &ifmgd->work);
|
|
}
|
|
|
|
static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
/* Reset own TSF to allow time synchronization work. */
|
|
drv_reset_tsf(local);
|
|
|
|
ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
|
|
|
|
|
|
if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
|
|
ifmgd->auth_alg = WLAN_AUTH_OPEN;
|
|
else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
|
|
ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
|
|
else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
|
|
ifmgd->auth_alg = WLAN_AUTH_LEAP;
|
|
else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
|
|
ifmgd->auth_alg = WLAN_AUTH_FT;
|
|
else
|
|
ifmgd->auth_alg = WLAN_AUTH_OPEN;
|
|
ifmgd->auth_transaction = -1;
|
|
ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
|
|
ifmgd->assoc_scan_tries = 0;
|
|
ifmgd->direct_probe_tries = 0;
|
|
ifmgd->auth_tries = 0;
|
|
ifmgd->assoc_tries = 0;
|
|
netif_tx_stop_all_queues(sdata->dev);
|
|
netif_carrier_off(sdata->dev);
|
|
}
|
|
|
|
static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_bss *bss;
|
|
u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
|
|
u8 ssid_len = ifmgd->ssid_len;
|
|
u16 capa_mask = WLAN_CAPABILITY_ESS;
|
|
u16 capa_val = WLAN_CAPABILITY_ESS;
|
|
struct ieee80211_channel *chan = local->oper_channel;
|
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
|
|
ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
|
|
IEEE80211_STA_AUTO_BSSID_SEL |
|
|
IEEE80211_STA_AUTO_CHANNEL_SEL)) {
|
|
capa_mask |= WLAN_CAPABILITY_PRIVACY;
|
|
if (sdata->default_key)
|
|
capa_val |= WLAN_CAPABILITY_PRIVACY;
|
|
}
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
|
|
chan = NULL;
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
|
|
bssid = NULL;
|
|
|
|
if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
|
|
ssid = NULL;
|
|
ssid_len = 0;
|
|
}
|
|
|
|
bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
|
|
bssid, ssid, ssid_len,
|
|
capa_mask, capa_val);
|
|
|
|
if (bss) {
|
|
ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
|
|
if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
|
|
ieee80211_sta_set_ssid(sdata, bss->ssid,
|
|
bss->ssid_len);
|
|
ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
|
|
ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
|
|
bss->supp_rates);
|
|
if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
|
|
sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
|
|
else
|
|
sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
|
|
|
|
/* Send out direct probe if no probe resp was received or
|
|
* the one we have is outdated
|
|
*/
|
|
if (!bss->last_probe_resp ||
|
|
time_after(jiffies, bss->last_probe_resp
|
|
+ IEEE80211_SCAN_RESULT_EXPIRE))
|
|
ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
|
|
else
|
|
ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
|
|
|
|
ieee80211_rx_bss_put(local, bss);
|
|
ieee80211_sta_reset_auth(sdata);
|
|
return 0;
|
|
} else {
|
|
if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
|
|
|
|
ifmgd->assoc_scan_tries++;
|
|
|
|
ieee80211_request_internal_scan(sdata, ifmgd->ssid,
|
|
ssid_len);
|
|
|
|
ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
|
|
set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
|
|
} else {
|
|
ifmgd->assoc_scan_tries = 0;
|
|
ifmgd->state = IEEE80211_STA_MLME_DISABLED;
|
|
ieee80211_recalc_idle(local);
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
static void ieee80211_sta_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_managed *ifmgd;
|
|
struct sk_buff *skb;
|
|
|
|
if (!netif_running(sdata->dev))
|
|
return;
|
|
|
|
if (local->sw_scanning || local->hw_scanning)
|
|
return;
|
|
|
|
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
|
|
return;
|
|
ifmgd = &sdata->u.mgd;
|
|
|
|
while ((skb = skb_dequeue(&ifmgd->skb_queue)))
|
|
ieee80211_sta_rx_queued_mgmt(sdata, skb);
|
|
|
|
if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
|
|
ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
|
|
ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
|
|
test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
|
|
queue_delayed_work(local->hw.workqueue, &local->scan_work,
|
|
round_jiffies_relative(0));
|
|
return;
|
|
}
|
|
|
|
if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
|
|
if (ieee80211_sta_config_auth(sdata))
|
|
return;
|
|
clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
|
|
} else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
|
|
return;
|
|
|
|
ieee80211_recalc_idle(local);
|
|
|
|
switch (ifmgd->state) {
|
|
case IEEE80211_STA_MLME_DISABLED:
|
|
break;
|
|
case IEEE80211_STA_MLME_DIRECT_PROBE:
|
|
ieee80211_direct_probe(sdata);
|
|
break;
|
|
case IEEE80211_STA_MLME_AUTHENTICATE:
|
|
ieee80211_authenticate(sdata);
|
|
break;
|
|
case IEEE80211_STA_MLME_ASSOCIATE:
|
|
ieee80211_associate(sdata);
|
|
break;
|
|
case IEEE80211_STA_MLME_ASSOCIATED:
|
|
ieee80211_associated(sdata);
|
|
break;
|
|
default:
|
|
WARN_ON(1);
|
|
break;
|
|
}
|
|
|
|
if (ieee80211_privacy_mismatch(sdata)) {
|
|
printk(KERN_DEBUG "%s: privacy configuration mismatch and "
|
|
"mixed-cell disabled - disassociate\n", sdata->dev->name);
|
|
|
|
ieee80211_set_disassoc(sdata, false, true,
|
|
WLAN_REASON_UNSPECIFIED);
|
|
}
|
|
}
|
|
|
|
static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
|
|
/*
|
|
* Need to update last_beacon to avoid beacon loss
|
|
* test to trigger.
|
|
*/
|
|
sdata->u.mgd.last_beacon = jiffies;
|
|
|
|
|
|
queue_work(sdata->local->hw.workqueue,
|
|
&sdata->u.mgd.work);
|
|
}
|
|
}
|
|
|
|
/* interface setup */
|
|
void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd;
|
|
u32 hw_flags;
|
|
|
|
ifmgd = &sdata->u.mgd;
|
|
INIT_WORK(&ifmgd->work, ieee80211_sta_work);
|
|
INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
|
|
INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
|
|
setup_timer(&ifmgd->timer, ieee80211_sta_timer,
|
|
(unsigned long) sdata);
|
|
setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
|
|
(unsigned long) sdata);
|
|
skb_queue_head_init(&ifmgd->skb_queue);
|
|
|
|
ifmgd->capab = WLAN_CAPABILITY_ESS;
|
|
ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
|
|
IEEE80211_AUTH_ALG_SHARED_KEY;
|
|
ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
|
|
IEEE80211_STA_AUTO_BSSID_SEL |
|
|
IEEE80211_STA_AUTO_CHANNEL_SEL;
|
|
if (sdata->local->hw.queues >= 4)
|
|
ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
|
|
|
|
hw_flags = sdata->local->hw.flags;
|
|
|
|
if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
|
|
ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
|
|
sdata->local->hw.conf.dynamic_ps_timeout = 500;
|
|
}
|
|
}
|
|
|
|
/* configuration hooks */
|
|
void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
|
|
return;
|
|
|
|
if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
|
|
IEEE80211_STA_AUTO_BSSID_SEL)) &&
|
|
(ifmgd->flags & (IEEE80211_STA_SSID_SET |
|
|
IEEE80211_STA_AUTO_SSID_SEL))) {
|
|
|
|
if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
|
|
ieee80211_set_disassoc(sdata, true, true,
|
|
WLAN_REASON_DEAUTH_LEAVING);
|
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
|
|
ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
|
|
set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
|
|
else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
|
|
set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
|
|
queue_work(local->hw.workqueue, &ifmgd->work);
|
|
}
|
|
}
|
|
|
|
int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
if (ifmgd->ssid_len)
|
|
ifmgd->flags |= IEEE80211_STA_SSID_SET;
|
|
else
|
|
ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd;
|
|
|
|
if (len > IEEE80211_MAX_SSID_LEN)
|
|
return -EINVAL;
|
|
|
|
ifmgd = &sdata->u.mgd;
|
|
|
|
if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
|
|
/*
|
|
* Do not use reassociation if SSID is changed (different ESS).
|
|
*/
|
|
ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
|
|
memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
|
|
memcpy(ifmgd->ssid, ssid, len);
|
|
ifmgd->ssid_len = len;
|
|
}
|
|
|
|
return ieee80211_sta_commit(sdata);
|
|
}
|
|
|
|
int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
|
|
*len = ifmgd->ssid_len;
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
if (is_valid_ether_addr(bssid)) {
|
|
memcpy(ifmgd->bssid, bssid, ETH_ALEN);
|
|
ifmgd->flags |= IEEE80211_STA_BSSID_SET;
|
|
} else {
|
|
memset(ifmgd->bssid, 0, ETH_ALEN);
|
|
ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
|
|
}
|
|
|
|
if (netif_running(sdata->dev))
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
|
|
|
|
return ieee80211_sta_commit(sdata);
|
|
}
|
|
|
|
int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
|
|
const char *ie, size_t len)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
kfree(ifmgd->extra_ie);
|
|
if (len == 0) {
|
|
ifmgd->extra_ie = NULL;
|
|
ifmgd->extra_ie_len = 0;
|
|
return 0;
|
|
}
|
|
ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
|
|
if (!ifmgd->extra_ie) {
|
|
ifmgd->extra_ie_len = 0;
|
|
return -ENOMEM;
|
|
}
|
|
memcpy(ifmgd->extra_ie, ie, len);
|
|
ifmgd->extra_ie_len = len;
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
|
|
{
|
|
printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
|
|
sdata->dev->name, reason);
|
|
|
|
ieee80211_set_disassoc(sdata, true, true, reason);
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
|
|
sdata->dev->name, reason);
|
|
|
|
if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
|
|
return -ENOLINK;
|
|
|
|
ieee80211_set_disassoc(sdata, false, true, reason);
|
|
return 0;
|
|
}
|
|
|
|
/* 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;
|
|
}
|