2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/pm_qos_params.h>
21 #include <linux/crc32.h>
22 #include <net/mac80211.h>
23 #include <asm/unaligned.h>
25 #include "ieee80211_i.h"
26 #include "driver-ops.h"
30 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
31 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32 #define IEEE80211_AUTH_MAX_TRIES 3
33 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34 #define IEEE80211_ASSOC_MAX_TRIES 3
35 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
36 #define IEEE80211_PROBE_WAIT (HZ / 5)
37 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
38 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
40 #define TMR_RUNNING_TIMER 0
41 #define TMR_RUNNING_CHANSW 1
44 static int ecw2cw(int ecw)
46 return (1 << ecw) - 1;
49 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
53 pos = bss->cbss.information_elements;
56 end = pos + bss->cbss.len_information_elements;
58 while (pos + 1 < end) {
59 if (pos + 2 + pos[1] > end)
69 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
70 struct ieee80211_supported_band *sband,
76 for (i = 0; i < bss->supp_rates_len; i++) {
77 int rate = (bss->supp_rates[i] & 0x7F) * 5;
79 for (j = 0; j < sband->n_bitrates; j++)
80 if (sband->bitrates[j].bitrate == rate) {
91 * ieee80211_enable_ht should be called only after the operating band
92 * has been determined as ht configuration depends on the hw's
93 * HT abilities for a specific band.
95 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
96 struct ieee80211_ht_info *hti,
99 struct ieee80211_local *local = sdata->local;
100 struct ieee80211_supported_band *sband;
101 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
102 struct sta_info *sta;
105 bool enable_ht = true, ht_changed;
106 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
108 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
110 /* HT is not supported */
111 if (!sband->ht_cap.ht_supported)
114 /* check that channel matches the right operating channel */
115 if (local->hw.conf.channel->center_freq !=
116 ieee80211_channel_to_frequency(hti->control_chan))
120 channel_type = NL80211_CHAN_HT20;
122 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
123 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
124 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
125 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
126 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
127 if (!(local->hw.conf.channel->flags &
128 IEEE80211_CHAN_NO_HT40PLUS))
129 channel_type = NL80211_CHAN_HT40PLUS;
131 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
132 if (!(local->hw.conf.channel->flags &
133 IEEE80211_CHAN_NO_HT40MINUS))
134 channel_type = NL80211_CHAN_HT40MINUS;
140 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
141 channel_type != local->hw.conf.channel_type;
143 local->oper_channel_type = channel_type;
146 /* channel_type change automatically detected */
147 ieee80211_hw_config(local, 0);
151 sta = sta_info_get(local, ifmgd->bssid);
153 rate_control_rate_update(local, sband, sta,
154 IEEE80211_RC_HT_CHANGED);
163 ht_opmode = le16_to_cpu(hti->operation_mode);
165 /* if bss configuration changed store the new one */
166 if (!sdata->ht_opmode_valid ||
167 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
168 changed |= BSS_CHANGED_HT;
169 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
170 sdata->ht_opmode_valid = true;
176 /* frame sending functions */
178 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
180 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
181 struct ieee80211_local *local = sdata->local;
183 struct ieee80211_mgmt *mgmt;
184 u8 *pos, *ies, *ht_ie;
185 int i, len, count, rates_len, supp_rates_len;
187 struct ieee80211_bss *bss;
189 struct ieee80211_supported_band *sband;
192 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
193 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
196 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
197 "frame\n", sdata->dev->name);
200 skb_reserve(skb, local->hw.extra_tx_headroom);
202 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
204 capab = ifmgd->capab;
206 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
207 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
208 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
209 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
210 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
213 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
214 local->hw.conf.channel->center_freq,
215 ifmgd->ssid, ifmgd->ssid_len);
217 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
218 capab |= WLAN_CAPABILITY_PRIVACY;
222 /* get all rates supported by the device and the AP as
223 * some APs don't like getting a superset of their rates
224 * in the association request (e.g. D-Link DAP 1353 in
226 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
228 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
229 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
230 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
232 ieee80211_rx_bss_put(local, bss);
235 rates_len = sband->n_bitrates;
238 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
240 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
241 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
242 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
244 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
246 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
247 IEEE80211_STYPE_REASSOC_REQ);
248 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
249 mgmt->u.reassoc_req.listen_interval =
250 cpu_to_le16(local->hw.conf.listen_interval);
251 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
255 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
256 IEEE80211_STYPE_ASSOC_REQ);
257 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
258 mgmt->u.assoc_req.listen_interval =
259 cpu_to_le16(local->hw.conf.listen_interval);
263 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
264 *pos++ = WLAN_EID_SSID;
265 *pos++ = ifmgd->ssid_len;
266 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
268 /* add all rates which were marked to be used above */
269 supp_rates_len = rates_len;
270 if (supp_rates_len > 8)
273 len = sband->n_bitrates;
274 pos = skb_put(skb, supp_rates_len + 2);
275 *pos++ = WLAN_EID_SUPP_RATES;
276 *pos++ = supp_rates_len;
279 for (i = 0; i < sband->n_bitrates; i++) {
280 if (BIT(i) & rates) {
281 int rate = sband->bitrates[i].bitrate;
282 *pos++ = (u8) (rate / 5);
288 if (rates_len > count) {
289 pos = skb_put(skb, rates_len - count + 2);
290 *pos++ = WLAN_EID_EXT_SUPP_RATES;
291 *pos++ = rates_len - count;
293 for (i++; i < sband->n_bitrates; i++) {
294 if (BIT(i) & rates) {
295 int rate = sband->bitrates[i].bitrate;
296 *pos++ = (u8) (rate / 5);
301 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
302 /* 1. power capabilities */
303 pos = skb_put(skb, 4);
304 *pos++ = WLAN_EID_PWR_CAPABILITY;
306 *pos++ = 0; /* min tx power */
307 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
309 /* 2. supported channels */
310 /* TODO: get this in reg domain format */
311 pos = skb_put(skb, 2 * sband->n_channels + 2);
312 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
313 *pos++ = 2 * sband->n_channels;
314 for (i = 0; i < sband->n_channels; i++) {
315 *pos++ = ieee80211_frequency_to_channel(
316 sband->channels[i].center_freq);
317 *pos++ = 1; /* one channel in the subband*/
321 if (ifmgd->extra_ie) {
322 pos = skb_put(skb, ifmgd->extra_ie_len);
323 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
326 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
327 pos = skb_put(skb, 9);
328 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
329 *pos++ = 7; /* len */
330 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
333 *pos++ = 2; /* WME */
334 *pos++ = 0; /* WME info */
335 *pos++ = 1; /* WME ver */
339 /* wmm support is a must to HT */
341 * IEEE802.11n does not allow TKIP/WEP as pairwise
342 * ciphers in HT mode. We still associate in non-ht
343 * mode (11a/b/g) if any one of these ciphers is
344 * configured as pairwise.
346 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
347 sband->ht_cap.ht_supported &&
348 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
349 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
350 (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
351 struct ieee80211_ht_info *ht_info =
352 (struct ieee80211_ht_info *)(ht_ie + 2);
353 u16 cap = sband->ht_cap.cap;
355 u32 flags = local->hw.conf.channel->flags;
357 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
358 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
359 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
360 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
361 cap &= ~IEEE80211_HT_CAP_SGI_40;
364 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
365 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
366 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
367 cap &= ~IEEE80211_HT_CAP_SGI_40;
372 tmp = cpu_to_le16(cap);
373 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
374 *pos++ = WLAN_EID_HT_CAPABILITY;
375 *pos++ = sizeof(struct ieee80211_ht_cap);
376 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
377 memcpy(pos, &tmp, sizeof(u16));
379 /* TODO: needs a define here for << 2 */
380 *pos++ = sband->ht_cap.ampdu_factor |
381 (sband->ht_cap.ampdu_density << 2);
382 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
385 kfree(ifmgd->assocreq_ies);
386 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
387 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
388 if (ifmgd->assocreq_ies)
389 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
391 ieee80211_tx_skb(sdata, skb, 0);
395 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
396 u16 stype, u16 reason)
398 struct ieee80211_local *local = sdata->local;
399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
401 struct ieee80211_mgmt *mgmt;
403 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
405 printk(KERN_DEBUG "%s: failed to allocate buffer for "
406 "deauth/disassoc frame\n", sdata->dev->name);
409 skb_reserve(skb, local->hw.extra_tx_headroom);
411 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
413 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
414 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
415 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
416 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
418 /* u.deauth.reason_code == u.disassoc.reason_code */
419 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
421 if (stype == IEEE80211_STYPE_DEAUTH)
422 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len,
425 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len,
427 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
430 void ieee80211_send_pspoll(struct ieee80211_local *local,
431 struct ieee80211_sub_if_data *sdata)
433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
434 struct ieee80211_pspoll *pspoll;
438 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
440 printk(KERN_DEBUG "%s: failed to allocate buffer for "
441 "pspoll frame\n", sdata->dev->name);
444 skb_reserve(skb, local->hw.extra_tx_headroom);
446 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
447 memset(pspoll, 0, sizeof(*pspoll));
448 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
449 pspoll->frame_control = cpu_to_le16(fc);
450 pspoll->aid = cpu_to_le16(ifmgd->aid);
452 /* aid in PS-Poll has its two MSBs each set to 1 */
453 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
455 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
456 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
458 ieee80211_tx_skb(sdata, skb, 0);
461 void ieee80211_send_nullfunc(struct ieee80211_local *local,
462 struct ieee80211_sub_if_data *sdata,
466 struct ieee80211_hdr *nullfunc;
469 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
472 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
474 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
475 "frame\n", sdata->dev->name);
478 skb_reserve(skb, local->hw.extra_tx_headroom);
480 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
481 memset(nullfunc, 0, 24);
482 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
483 IEEE80211_FCTL_TODS);
485 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
486 nullfunc->frame_control = fc;
487 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
488 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
489 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
491 ieee80211_tx_skb(sdata, skb, 0);
494 /* spectrum management related things */
495 static void ieee80211_chswitch_work(struct work_struct *work)
497 struct ieee80211_sub_if_data *sdata =
498 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
499 struct ieee80211_bss *bss;
500 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
502 if (!netif_running(sdata->dev))
505 bss = ieee80211_rx_bss_get(sdata->local, ifmgd->bssid,
506 sdata->local->hw.conf.channel->center_freq,
507 ifmgd->ssid, ifmgd->ssid_len);
511 sdata->local->oper_channel = sdata->local->csa_channel;
512 /* XXX: shouldn't really modify cfg80211-owned data! */
513 if (!ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL))
514 bss->cbss.channel = sdata->local->oper_channel;
516 ieee80211_rx_bss_put(sdata->local, bss);
518 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
519 ieee80211_wake_queues_by_reason(&sdata->local->hw,
520 IEEE80211_QUEUE_STOP_REASON_CSA);
523 static void ieee80211_chswitch_timer(unsigned long data)
525 struct ieee80211_sub_if_data *sdata =
526 (struct ieee80211_sub_if_data *) data;
527 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
529 if (sdata->local->quiescing) {
530 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
534 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
537 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
538 struct ieee80211_channel_sw_ie *sw_elem,
539 struct ieee80211_bss *bss)
541 struct ieee80211_channel *new_ch;
542 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
543 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
545 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATED)
548 if (sdata->local->sw_scanning || sdata->local->hw_scanning)
551 /* Disregard subsequent beacons if we are already running a timer
554 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
557 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
558 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
561 sdata->local->csa_channel = new_ch;
563 if (sw_elem->count <= 1) {
564 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
566 ieee80211_stop_queues_by_reason(&sdata->local->hw,
567 IEEE80211_QUEUE_STOP_REASON_CSA);
568 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
569 mod_timer(&ifmgd->chswitch_timer,
571 msecs_to_jiffies(sw_elem->count *
572 bss->cbss.beacon_interval));
576 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
577 u16 capab_info, u8 *pwr_constr_elem,
578 u8 pwr_constr_elem_len)
580 struct ieee80211_conf *conf = &sdata->local->hw.conf;
582 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
585 /* Power constraint IE length should be 1 octet */
586 if (pwr_constr_elem_len != 1)
589 if ((*pwr_constr_elem <= conf->channel->max_power) &&
590 (*pwr_constr_elem != sdata->local->power_constr_level)) {
591 sdata->local->power_constr_level = *pwr_constr_elem;
592 ieee80211_hw_config(sdata->local, 0);
597 static void ieee80211_enable_ps(struct ieee80211_local *local,
598 struct ieee80211_sub_if_data *sdata)
600 struct ieee80211_conf *conf = &local->hw.conf;
603 * If we are scanning right now then the parameters will
604 * take effect when scan finishes.
606 if (local->hw_scanning || local->sw_scanning)
609 if (conf->dynamic_ps_timeout > 0 &&
610 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
611 mod_timer(&local->dynamic_ps_timer, jiffies +
612 msecs_to_jiffies(conf->dynamic_ps_timeout));
614 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
615 ieee80211_send_nullfunc(local, sdata, 1);
616 conf->flags |= IEEE80211_CONF_PS;
617 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
621 static void ieee80211_change_ps(struct ieee80211_local *local)
623 struct ieee80211_conf *conf = &local->hw.conf;
625 if (local->ps_sdata) {
626 ieee80211_enable_ps(local, local->ps_sdata);
627 } else if (conf->flags & IEEE80211_CONF_PS) {
628 conf->flags &= ~IEEE80211_CONF_PS;
629 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
630 del_timer_sync(&local->dynamic_ps_timer);
631 cancel_work_sync(&local->dynamic_ps_enable_work);
635 /* need to hold RTNL or interface lock */
636 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
638 struct ieee80211_sub_if_data *sdata, *found = NULL;
641 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
642 local->ps_sdata = NULL;
646 list_for_each_entry(sdata, &local->interfaces, list) {
647 if (!netif_running(sdata->dev))
649 if (sdata->vif.type != NL80211_IFTYPE_STATION)
655 if (count == 1 && found->u.mgd.powersave &&
656 (found->u.mgd.flags & IEEE80211_STA_ASSOCIATED) &&
657 !(found->u.mgd.flags & IEEE80211_STA_PROBEREQ_POLL)) {
661 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
663 beaconint_us = ieee80211_tu_to_usec(
664 found->vif.bss_conf.beacon_int);
666 if (beaconint_us > latency) {
667 local->ps_sdata = NULL;
669 u8 dtimper = found->vif.bss_conf.dtim_period;
673 maxslp = min_t(int, dtimper,
674 latency / beaconint_us);
676 local->hw.conf.max_sleep_period = maxslp;
677 local->ps_sdata = found;
680 local->ps_sdata = NULL;
683 ieee80211_change_ps(local);
686 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
688 struct ieee80211_local *local =
689 container_of(work, struct ieee80211_local,
690 dynamic_ps_disable_work);
692 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
693 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
694 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
697 ieee80211_wake_queues_by_reason(&local->hw,
698 IEEE80211_QUEUE_STOP_REASON_PS);
701 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
703 struct ieee80211_local *local =
704 container_of(work, struct ieee80211_local,
705 dynamic_ps_enable_work);
706 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
708 /* can only happen when PS was just disabled anyway */
712 if (local->hw.conf.flags & IEEE80211_CONF_PS)
715 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
716 ieee80211_send_nullfunc(local, sdata, 1);
718 local->hw.conf.flags |= IEEE80211_CONF_PS;
719 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
722 void ieee80211_dynamic_ps_timer(unsigned long data)
724 struct ieee80211_local *local = (void *) data;
726 if (local->quiescing)
729 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
733 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
734 struct ieee80211_if_managed *ifmgd,
735 u8 *wmm_param, size_t wmm_param_len)
737 struct ieee80211_tx_queue_params params;
742 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
748 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
750 count = wmm_param[6] & 0x0f;
751 if (count == ifmgd->wmm_last_param_set)
753 ifmgd->wmm_last_param_set = count;
756 left = wmm_param_len - 8;
758 memset(¶ms, 0, sizeof(params));
761 for (; left >= 4; left -= 4, pos += 4) {
762 int aci = (pos[0] >> 5) & 0x03;
763 int acm = (pos[0] >> 4) & 0x01;
770 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
775 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
780 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
786 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
790 params.aifs = pos[0] & 0x0f;
791 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
792 params.cw_min = ecw2cw(pos[1] & 0x0f);
793 params.txop = get_unaligned_le16(pos + 2);
794 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
795 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
796 "cWmin=%d cWmax=%d txop=%d\n",
797 wiphy_name(local->hw.wiphy), queue, aci, acm,
798 params.aifs, params.cw_min, params.cw_max, params.txop);
800 if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx)
801 printk(KERN_DEBUG "%s: failed to set TX queue "
802 "parameters for queue %d\n",
803 wiphy_name(local->hw.wiphy), queue);
807 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
808 u16 capab, bool erp_valid, u8 erp)
810 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
811 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
812 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
816 bool use_short_preamble;
820 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
821 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
823 use_protection = false;
824 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
827 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
829 if (use_protection != bss_conf->use_cts_prot) {
830 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
831 if (net_ratelimit()) {
832 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
834 use_protection ? "enabled" : "disabled",
838 bss_conf->use_cts_prot = use_protection;
839 changed |= BSS_CHANGED_ERP_CTS_PROT;
842 if (use_short_preamble != bss_conf->use_short_preamble) {
843 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
844 if (net_ratelimit()) {
845 printk(KERN_DEBUG "%s: switched to %s barker preamble"
848 use_short_preamble ? "short" : "long",
852 bss_conf->use_short_preamble = use_short_preamble;
853 changed |= BSS_CHANGED_ERP_PREAMBLE;
856 if (use_short_slot != bss_conf->use_short_slot) {
857 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
858 if (net_ratelimit()) {
859 printk(KERN_DEBUG "%s: switched to %s slot time"
862 use_short_slot ? "short" : "long",
866 bss_conf->use_short_slot = use_short_slot;
867 changed |= BSS_CHANGED_ERP_SLOT;
873 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
874 u32 bss_info_changed)
876 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
877 struct ieee80211_local *local = sdata->local;
878 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
880 struct ieee80211_bss *bss;
882 bss_info_changed |= BSS_CHANGED_ASSOC;
883 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
885 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
886 conf->channel->center_freq,
887 ifmgd->ssid, ifmgd->ssid_len);
889 /* set timing information */
890 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
891 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
892 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
894 bss_info_changed |= BSS_CHANGED_BEACON_INT;
895 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
896 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
898 cfg80211_hold_bss(&bss->cbss);
900 ieee80211_rx_bss_put(local, bss);
903 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
904 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
906 ifmgd->last_probe = jiffies;
907 ieee80211_led_assoc(local, 1);
909 sdata->vif.bss_conf.assoc = 1;
911 * For now just always ask the driver to update the basic rateset
912 * when we have associated, we aren't checking whether it actually
915 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
917 /* And the BSSID changed - we're associated now */
918 bss_info_changed |= BSS_CHANGED_BSSID;
920 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
922 /* will be same as sdata */
923 if (local->ps_sdata) {
924 mutex_lock(&local->iflist_mtx);
925 ieee80211_recalc_ps(local, -1);
926 mutex_unlock(&local->iflist_mtx);
929 netif_tx_start_all_queues(sdata->dev);
930 netif_carrier_on(sdata->dev);
933 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
935 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
936 struct ieee80211_local *local = sdata->local;
938 ifmgd->direct_probe_tries++;
939 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
940 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
941 sdata->dev->name, ifmgd->bssid);
942 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
943 ieee80211_recalc_idle(local);
944 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid,
948 * Most likely AP is not in the range so remove the
949 * bss information associated to the AP
951 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
952 sdata->local->hw.conf.channel->center_freq,
953 ifmgd->ssid, ifmgd->ssid_len);
956 * We might have a pending scan which had no chance to run yet
957 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
958 * Hence, queue the STAs work again
960 queue_work(local->hw.workqueue, &ifmgd->work);
964 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
965 sdata->dev->name, ifmgd->bssid,
966 ifmgd->direct_probe_tries);
968 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
970 /* Direct probe is sent to broadcast address as some APs
971 * will not answer to direct packet in unassociated state.
973 ieee80211_send_probe_req(sdata, NULL,
974 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
976 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
980 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
982 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
983 struct ieee80211_local *local = sdata->local;
986 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
987 printk(KERN_DEBUG "%s: authentication with AP %pM"
989 sdata->dev->name, ifmgd->bssid);
990 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
991 ieee80211_recalc_idle(local);
992 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid,
994 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
995 sdata->local->hw.conf.channel->center_freq,
996 ifmgd->ssid, ifmgd->ssid_len);
999 * We might have a pending scan which had no chance to run yet
1000 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
1001 * Hence, queue the STAs work again
1003 queue_work(local->hw.workqueue, &ifmgd->work);
1007 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1008 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
1009 sdata->dev->name, ifmgd->bssid);
1011 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ifmgd->sme_auth_ie,
1012 ifmgd->sme_auth_ie_len, ifmgd->bssid, 0);
1013 ifmgd->auth_transaction = 2;
1015 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
1019 * The disassoc 'reason' argument can be either our own reason
1020 * if self disconnected or a reason code from the AP.
1022 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1023 bool deauth, bool self_disconnected,
1026 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1027 struct ieee80211_local *local = sdata->local;
1028 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
1029 struct ieee80211_bss *bss;
1030 struct sta_info *sta;
1031 u32 changed = 0, config_changed = 0;
1034 ifmgd->direct_probe_tries = 0;
1035 ifmgd->auth_tries = 0;
1037 ifmgd->assoc_scan_tries = 0;
1038 ifmgd->assoc_tries = 0;
1040 netif_tx_stop_all_queues(sdata->dev);
1041 netif_carrier_off(sdata->dev);
1044 sta = sta_info_get(local, ifmgd->bssid);
1046 ieee80211_sta_tear_down_BA_sessions(sta);
1049 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1050 conf->channel->center_freq,
1051 ifmgd->ssid, ifmgd->ssid_len);
1054 cfg80211_unhold_bss(&bss->cbss);
1055 ieee80211_rx_bss_put(local, bss);
1058 if (self_disconnected) {
1060 ieee80211_send_deauth_disassoc(sdata,
1061 IEEE80211_STYPE_DEAUTH, reason);
1063 ieee80211_send_deauth_disassoc(sdata,
1064 IEEE80211_STYPE_DISASSOC, reason);
1067 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1068 changed |= ieee80211_reset_erp_info(sdata);
1070 ieee80211_led_assoc(local, 0);
1071 changed |= BSS_CHANGED_ASSOC;
1072 sdata->vif.bss_conf.assoc = false;
1074 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1075 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1076 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1077 sdata->local->hw.conf.channel->center_freq,
1078 ifmgd->ssid, ifmgd->ssid_len);
1081 ieee80211_set_wmm_default(sdata);
1083 ieee80211_recalc_idle(local);
1085 /* channel(_type) changes are handled by ieee80211_hw_config */
1086 local->oper_channel_type = NL80211_CHAN_NO_HT;
1088 /* on the next assoc, re-program HT parameters */
1089 sdata->ht_opmode_valid = false;
1091 local->power_constr_level = 0;
1093 del_timer_sync(&local->dynamic_ps_timer);
1094 cancel_work_sync(&local->dynamic_ps_enable_work);
1096 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1097 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1098 config_changed |= IEEE80211_CONF_CHANGE_PS;
1101 ieee80211_hw_config(local, config_changed);
1103 /* And the BSSID changed -- not very interesting here */
1104 changed |= BSS_CHANGED_BSSID;
1105 ieee80211_bss_info_change_notify(sdata, changed);
1109 sta = sta_info_get(local, ifmgd->bssid);
1115 sta_info_unlink(&sta);
1119 sta_info_destroy(sta);
1122 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1125 struct ieee80211_local *local = sdata->local;
1127 ifmgd->assoc_tries++;
1128 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1129 printk(KERN_DEBUG "%s: association with AP %pM"
1131 sdata->dev->name, ifmgd->bssid);
1132 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1133 ieee80211_recalc_idle(local);
1134 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid,
1136 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1137 sdata->local->hw.conf.channel->center_freq,
1138 ifmgd->ssid, ifmgd->ssid_len);
1140 * We might have a pending scan which had no chance to run yet
1141 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1142 * Hence, queue the STAs work again
1144 queue_work(local->hw.workqueue, &ifmgd->work);
1148 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1149 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1150 sdata->dev->name, ifmgd->bssid);
1151 ieee80211_send_assoc(sdata);
1153 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1156 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1157 struct ieee80211_hdr *hdr)
1160 * We can postpone the mgd.timer whenever receiving unicast frames
1161 * from AP because we know that the connection is working both ways
1162 * at that time. But multicast frames (and hence also beacons) must
1163 * be ignored here, because we need to trigger the timer during
1164 * data idle periods for sending the periodical probe request to
1167 if (!is_multicast_ether_addr(hdr->addr1))
1168 mod_timer(&sdata->u.mgd.timer,
1169 jiffies + IEEE80211_MONITORING_INTERVAL);
1172 void ieee80211_beacon_loss_work(struct work_struct *work)
1174 struct ieee80211_sub_if_data *sdata =
1175 container_of(work, struct ieee80211_sub_if_data,
1176 u.mgd.beacon_loss_work);
1177 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1180 * The driver has already reported this event and we have
1181 * already sent a probe request. Maybe the AP died and the
1182 * driver keeps reporting until we disassociate... We have
1183 * to ignore that because otherwise we would continually
1184 * reset the timer and never check whether we received a
1187 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1190 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1191 if (net_ratelimit()) {
1192 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1193 "- sending probe request\n", sdata->dev->name,
1194 sdata->u.mgd.bssid);
1198 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1200 mutex_lock(&sdata->local->iflist_mtx);
1201 ieee80211_recalc_ps(sdata->local, -1);
1202 mutex_unlock(&sdata->local->iflist_mtx);
1204 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1205 ifmgd->ssid_len, NULL, 0);
1207 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1210 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1212 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1214 queue_work(sdata->local->hw.workqueue,
1215 &sdata->u.mgd.beacon_loss_work);
1217 EXPORT_SYMBOL(ieee80211_beacon_loss);
1219 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1221 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1222 struct ieee80211_local *local = sdata->local;
1223 struct sta_info *sta;
1224 unsigned long last_rx;
1225 bool disassoc = false;
1227 /* TODO: start monitoring current AP signal quality and number of
1228 * missed beacons. Scan other channels every now and then and search
1229 * for better APs. */
1230 /* TODO: remove expired BSSes */
1232 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1236 sta = sta_info_get(local, ifmgd->bssid);
1238 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1239 sdata->dev->name, ifmgd->bssid);
1245 last_rx = sta->last_rx;
1248 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1249 time_after(jiffies, last_rx + IEEE80211_PROBE_WAIT)) {
1250 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1251 "- disassociating\n",
1252 sdata->dev->name, ifmgd->bssid);
1254 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1259 * Beacon filtering is only enabled with power save and then the
1260 * stack should not check for beacon loss.
1262 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1263 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1265 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1266 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1267 if (net_ratelimit()) {
1268 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1269 "- sending probe request\n",
1270 sdata->dev->name, ifmgd->bssid);
1273 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1274 mutex_lock(&local->iflist_mtx);
1275 ieee80211_recalc_ps(local, -1);
1276 mutex_unlock(&local->iflist_mtx);
1277 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1278 ifmgd->ssid_len, NULL, 0);
1279 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1283 if (time_after(jiffies, last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1284 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1285 mutex_lock(&local->iflist_mtx);
1286 ieee80211_recalc_ps(local, -1);
1287 mutex_unlock(&local->iflist_mtx);
1288 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1289 ifmgd->ssid_len, NULL, 0);
1294 mod_timer(&ifmgd->timer,
1295 jiffies + IEEE80211_MONITORING_INTERVAL);
1297 ieee80211_set_disassoc(sdata, true, true,
1298 WLAN_REASON_PREV_AUTH_NOT_VALID);
1302 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1304 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1306 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1307 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1308 /* Wait for SME to request association */
1309 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1310 ieee80211_recalc_idle(sdata->local);
1314 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1315 struct ieee80211_mgmt *mgmt,
1319 struct ieee802_11_elems elems;
1321 pos = mgmt->u.auth.variable;
1322 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1323 if (!elems.challenge)
1325 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1326 elems.challenge - 2, elems.challenge_len + 2,
1327 sdata->u.mgd.bssid, 1);
1328 sdata->u.mgd.auth_transaction = 4;
1331 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1332 struct ieee80211_mgmt *mgmt,
1335 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1336 u16 auth_alg, auth_transaction, status_code;
1338 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1344 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1347 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1350 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1351 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1352 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1354 if (auth_alg != ifmgd->auth_alg ||
1355 auth_transaction != ifmgd->auth_transaction)
1358 if (status_code != WLAN_STATUS_SUCCESS) {
1359 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len,
1361 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1362 ieee80211_recalc_idle(sdata->local);
1366 switch (ifmgd->auth_alg) {
1367 case WLAN_AUTH_OPEN:
1368 case WLAN_AUTH_LEAP:
1370 ieee80211_auth_completed(sdata);
1371 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len,
1374 case WLAN_AUTH_SHARED_KEY:
1375 if (ifmgd->auth_transaction == 4) {
1376 ieee80211_auth_completed(sdata);
1377 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len,
1380 ieee80211_auth_challenge(sdata, mgmt, len);
1386 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1387 struct ieee80211_mgmt *mgmt,
1390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1396 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1399 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1401 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1402 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1403 sdata->dev->name, reason_code);
1405 ieee80211_set_disassoc(sdata, true, false, 0);
1406 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1407 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL);
1411 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1412 struct ieee80211_mgmt *mgmt,
1415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1421 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1424 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1426 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1427 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1428 sdata->dev->name, reason_code);
1430 ieee80211_set_disassoc(sdata, false, false, reason_code);
1431 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL);
1435 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1436 struct ieee80211_mgmt *mgmt,
1440 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1441 struct ieee80211_local *local = sdata->local;
1442 struct ieee80211_supported_band *sband;
1443 struct sta_info *sta;
1444 u32 rates, basic_rates;
1445 u16 capab_info, status_code, aid;
1446 struct ieee802_11_elems elems;
1447 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1451 bool have_higher_than_11mbit = false, newsta = false;
1452 u16 ap_ht_cap_flags;
1454 /* AssocResp and ReassocResp have identical structure, so process both
1455 * of them in this function. */
1457 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1463 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1466 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1467 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1468 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1470 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1471 "status=%d aid=%d)\n",
1472 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1473 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1475 pos = mgmt->u.assoc_resp.variable;
1476 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1478 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1479 elems.timeout_int && elems.timeout_int_len == 5 &&
1480 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1482 tu = get_unaligned_le32(elems.timeout_int + 1);
1483 ms = tu * 1024 / 1000;
1484 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1485 "comeback duration %u TU (%u ms)\n",
1486 sdata->dev->name, tu, ms);
1487 if (ms > IEEE80211_ASSOC_TIMEOUT)
1488 mod_timer(&ifmgd->timer,
1489 jiffies + msecs_to_jiffies(ms));
1493 if (status_code != WLAN_STATUS_SUCCESS) {
1494 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1495 sdata->dev->name, status_code);
1496 /* if this was a reassociation, ensure we try a "full"
1497 * association next time. This works around some broken APs
1498 * which do not correctly reject reassociation requests. */
1499 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1500 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len,
1502 /* Wait for SME to decide what to do next */
1503 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1504 ieee80211_recalc_idle(local);
1508 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1509 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1510 "set\n", sdata->dev->name, aid);
1511 aid &= ~(BIT(15) | BIT(14));
1513 if (!elems.supp_rates) {
1514 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1519 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1521 ifmgd->ap_capab = capab_info;
1523 kfree(ifmgd->assocresp_ies);
1524 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1525 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1526 if (ifmgd->assocresp_ies)
1527 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1531 /* Add STA entry for the AP */
1532 sta = sta_info_get(local, ifmgd->bssid);
1536 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1538 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1539 " the AP\n", sdata->dev->name);
1544 /* update new sta with its last rx activity */
1545 sta->last_rx = jiffies;
1549 * FIXME: Do we really need to update the sta_info's information here?
1550 * We already know about the AP (we found it in our list) so it
1551 * should already be filled with the right info, no?
1552 * As is stands, all this is racy because typically we assume
1553 * the information that is filled in here (except flags) doesn't
1554 * change while a STA structure is alive. As such, it should move
1555 * to between the sta_info_alloc() and sta_info_insert() above.
1558 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP);
1559 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1560 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1564 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1566 for (i = 0; i < elems.supp_rates_len; i++) {
1567 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1568 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1571 have_higher_than_11mbit = true;
1573 for (j = 0; j < sband->n_bitrates; j++) {
1574 if (sband->bitrates[j].bitrate == rate) {
1577 basic_rates |= BIT(j);
1583 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1584 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1585 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1588 have_higher_than_11mbit = true;
1590 for (j = 0; j < sband->n_bitrates; j++) {
1591 if (sband->bitrates[j].bitrate == rate) {
1594 basic_rates |= BIT(j);
1600 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1601 sdata->vif.bss_conf.basic_rates = basic_rates;
1603 /* cf. IEEE 802.11 9.2.12 */
1604 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1605 have_higher_than_11mbit)
1606 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1608 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1610 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1611 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1612 elems.ht_cap_elem, &sta->sta.ht_cap);
1614 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1616 rate_control_rate_init(sta);
1618 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1619 set_sta_flags(sta, WLAN_STA_MFP);
1621 if (elems.wmm_param)
1622 set_sta_flags(sta, WLAN_STA_WME);
1625 int err = sta_info_insert(sta);
1627 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1628 " the AP (error %d)\n", sdata->dev->name, err);
1636 if (elems.wmm_param)
1637 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1638 elems.wmm_param_len);
1640 ieee80211_set_wmm_default(sdata);
1642 if (elems.ht_info_elem && elems.wmm_param &&
1643 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1644 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1645 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1648 /* set AID and assoc capability,
1649 * ieee80211_set_associated() will tell the driver */
1650 bss_conf->aid = aid;
1651 bss_conf->assoc_capability = capab_info;
1652 ieee80211_set_associated(sdata, changed);
1655 * initialise the time of last beacon to be the association time,
1656 * otherwise beacon loss check will trigger immediately
1658 ifmgd->last_beacon = jiffies;
1660 ieee80211_associated(sdata);
1661 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL);
1665 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1666 struct ieee80211_mgmt *mgmt,
1668 struct ieee80211_rx_status *rx_status,
1669 struct ieee802_11_elems *elems,
1672 struct ieee80211_local *local = sdata->local;
1674 struct ieee80211_bss *bss;
1675 struct ieee80211_channel *channel;
1677 if (elems->ds_params && elems->ds_params_len == 1)
1678 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1680 freq = rx_status->freq;
1682 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1684 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1687 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1692 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1693 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1694 struct ieee80211_channel_sw_ie *sw_elem =
1695 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1696 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1699 ieee80211_rx_bss_put(local, bss);
1703 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1704 struct ieee80211_mgmt *mgmt,
1706 struct ieee80211_rx_status *rx_status)
1708 struct ieee80211_if_managed *ifmgd;
1710 struct ieee802_11_elems elems;
1712 ifmgd = &sdata->u.mgd;
1714 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1715 return; /* ignore ProbeResp to foreign address */
1717 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1721 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1724 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1726 /* direct probe may be part of the association flow */
1727 if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
1728 printk(KERN_DEBUG "%s direct probe responded\n",
1730 ieee80211_authenticate(sdata);
1733 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1734 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1735 mutex_lock(&sdata->local->iflist_mtx);
1736 ieee80211_recalc_ps(sdata->local, -1);
1737 mutex_unlock(&sdata->local->iflist_mtx);
1742 * This is the canonical list of information elements we care about,
1743 * the filter code also gives us all changes to the Microsoft OUI
1744 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1746 * We implement beacon filtering in software since that means we can
1747 * avoid processing the frame here and in cfg80211, and userspace
1748 * will not be able to tell whether the hardware supports it or not.
1750 * XXX: This list needs to be dynamic -- userspace needs to be able to
1751 * add items it requires. It also needs to be able to tell us to
1752 * look out for other vendor IEs.
1754 static const u64 care_about_ies =
1755 (1ULL << WLAN_EID_COUNTRY) |
1756 (1ULL << WLAN_EID_ERP_INFO) |
1757 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1758 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1759 (1ULL << WLAN_EID_HT_CAPABILITY) |
1760 (1ULL << WLAN_EID_HT_INFORMATION);
1762 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1763 struct ieee80211_mgmt *mgmt,
1765 struct ieee80211_rx_status *rx_status)
1767 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1769 struct ieee802_11_elems elems;
1770 struct ieee80211_local *local = sdata->local;
1772 bool erp_valid, directed_tim = false;
1776 /* Process beacon from the current BSS */
1777 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1781 if (rx_status->freq != local->hw.conf.channel->center_freq)
1784 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1785 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1788 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1789 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1790 if (net_ratelimit()) {
1791 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1792 "to a received beacon\n", sdata->dev->name);
1795 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1796 mutex_lock(&local->iflist_mtx);
1797 ieee80211_recalc_ps(local, -1);
1798 mutex_unlock(&local->iflist_mtx);
1801 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1802 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1803 len - baselen, &elems,
1804 care_about_ies, ncrc);
1806 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1807 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1810 if (ncrc != ifmgd->beacon_crc) {
1811 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1814 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1815 elems.wmm_param_len);
1818 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1820 if (local->hw.conf.dynamic_ps_timeout > 0) {
1821 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1822 ieee80211_hw_config(local,
1823 IEEE80211_CONF_CHANGE_PS);
1824 ieee80211_send_nullfunc(local, sdata, 0);
1826 local->pspolling = true;
1829 * Here is assumed that the driver will be
1830 * able to send ps-poll frame and receive a
1831 * response even though power save mode is
1832 * enabled, but some drivers might require
1833 * to disable power save here. This needs
1834 * to be investigated.
1836 ieee80211_send_pspoll(local, sdata);
1841 if (ncrc == ifmgd->beacon_crc)
1843 ifmgd->beacon_crc = ncrc;
1845 if (elems.erp_info && elems.erp_info_len >= 1) {
1847 erp_value = elems.erp_info[0];
1851 changed |= ieee80211_handle_bss_capability(sdata,
1852 le16_to_cpu(mgmt->u.beacon.capab_info),
1853 erp_valid, erp_value);
1856 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1857 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1858 struct sta_info *sta;
1859 struct ieee80211_supported_band *sband;
1860 u16 ap_ht_cap_flags;
1864 sta = sta_info_get(local, ifmgd->bssid);
1870 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1872 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1873 elems.ht_cap_elem, &sta->sta.ht_cap);
1875 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1879 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1883 if (elems.country_elem) {
1884 /* Note we are only reviewing this on beacons
1885 * for the BSSID we are associated to */
1886 regulatory_hint_11d(local->hw.wiphy,
1887 elems.country_elem, elems.country_elem_len);
1889 /* TODO: IBSS also needs this */
1890 if (elems.pwr_constr_elem)
1891 ieee80211_handle_pwr_constr(sdata,
1892 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1893 elems.pwr_constr_elem,
1894 elems.pwr_constr_elem_len);
1897 ieee80211_bss_info_change_notify(sdata, changed);
1900 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1901 struct sk_buff *skb)
1903 struct ieee80211_local *local = sdata->local;
1904 struct ieee80211_mgmt *mgmt;
1908 return RX_DROP_MONITOR;
1910 mgmt = (struct ieee80211_mgmt *) skb->data;
1911 fc = le16_to_cpu(mgmt->frame_control);
1913 switch (fc & IEEE80211_FCTL_STYPE) {
1914 case IEEE80211_STYPE_PROBE_REQ:
1915 case IEEE80211_STYPE_PROBE_RESP:
1916 case IEEE80211_STYPE_BEACON:
1917 case IEEE80211_STYPE_AUTH:
1918 case IEEE80211_STYPE_ASSOC_RESP:
1919 case IEEE80211_STYPE_REASSOC_RESP:
1920 case IEEE80211_STYPE_DEAUTH:
1921 case IEEE80211_STYPE_DISASSOC:
1922 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1923 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1927 return RX_DROP_MONITOR;
1930 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1931 struct sk_buff *skb)
1933 struct ieee80211_rx_status *rx_status;
1934 struct ieee80211_mgmt *mgmt;
1937 rx_status = (struct ieee80211_rx_status *) skb->cb;
1938 mgmt = (struct ieee80211_mgmt *) skb->data;
1939 fc = le16_to_cpu(mgmt->frame_control);
1941 switch (fc & IEEE80211_FCTL_STYPE) {
1942 case IEEE80211_STYPE_PROBE_RESP:
1943 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1946 case IEEE80211_STYPE_BEACON:
1947 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1950 case IEEE80211_STYPE_AUTH:
1951 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1953 case IEEE80211_STYPE_ASSOC_RESP:
1954 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1956 case IEEE80211_STYPE_REASSOC_RESP:
1957 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1959 case IEEE80211_STYPE_DEAUTH:
1960 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1962 case IEEE80211_STYPE_DISASSOC:
1963 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1970 static void ieee80211_sta_timer(unsigned long data)
1972 struct ieee80211_sub_if_data *sdata =
1973 (struct ieee80211_sub_if_data *) data;
1974 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1975 struct ieee80211_local *local = sdata->local;
1977 if (local->quiescing) {
1978 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1982 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1983 queue_work(local->hw.workqueue, &ifmgd->work);
1986 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1988 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1989 struct ieee80211_local *local = sdata->local;
1991 /* Reset own TSF to allow time synchronization work. */
1992 drv_reset_tsf(local);
1994 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1995 ifmgd->auth_transaction = -1;
1996 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1997 ifmgd->assoc_scan_tries = 0;
1998 ifmgd->direct_probe_tries = 0;
1999 ifmgd->auth_tries = 0;
2000 ifmgd->assoc_tries = 0;
2001 netif_tx_stop_all_queues(sdata->dev);
2002 netif_carrier_off(sdata->dev);
2005 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2008 struct ieee80211_local *local = sdata->local;
2009 struct ieee80211_bss *bss;
2010 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2011 u8 ssid_len = ifmgd->ssid_len;
2012 u16 capa_mask = WLAN_CAPABILITY_ESS;
2013 u16 capa_val = WLAN_CAPABILITY_ESS;
2014 struct ieee80211_channel *chan = local->oper_channel;
2016 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2017 bssid, ssid, ssid_len,
2018 capa_mask, capa_val);
2021 local->oper_channel = bss->cbss.channel;
2022 local->oper_channel_type = NL80211_CHAN_NO_HT;
2023 ieee80211_hw_config(local, 0);
2025 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2027 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2028 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2030 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2032 /* Send out direct probe if no probe resp was received or
2033 * the one we have is outdated
2035 if (!bss->last_probe_resp ||
2036 time_after(jiffies, bss->last_probe_resp
2037 + IEEE80211_SCAN_RESULT_EXPIRE))
2038 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2040 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2042 ieee80211_rx_bss_put(local, bss);
2043 ieee80211_sta_reset_auth(sdata);
2046 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2048 ifmgd->assoc_scan_tries++;
2050 ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2053 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2054 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2056 ifmgd->assoc_scan_tries = 0;
2057 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2058 ieee80211_recalc_idle(local);
2065 static void ieee80211_sta_work(struct work_struct *work)
2067 struct ieee80211_sub_if_data *sdata =
2068 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2069 struct ieee80211_local *local = sdata->local;
2070 struct ieee80211_if_managed *ifmgd;
2071 struct sk_buff *skb;
2073 if (!netif_running(sdata->dev))
2076 if (local->sw_scanning || local->hw_scanning)
2079 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2083 * Nothing should have been stuffed into the workqueue during
2084 * the suspend->resume cycle. If this WARN is seen then there
2085 * is a bug with either the driver suspend or something in
2086 * mac80211 stuffing into the workqueue which we haven't yet
2087 * cleared during mac80211's suspend cycle.
2089 if (WARN_ON(local->suspended))
2092 ifmgd = &sdata->u.mgd;
2094 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2095 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2097 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2098 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2099 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2100 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2101 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2102 round_jiffies_relative(0));
2106 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2107 if (ieee80211_sta_config_auth(sdata))
2109 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2110 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2113 ieee80211_recalc_idle(local);
2115 switch (ifmgd->state) {
2116 case IEEE80211_STA_MLME_DISABLED:
2118 case IEEE80211_STA_MLME_DIRECT_PROBE:
2119 ieee80211_direct_probe(sdata);
2121 case IEEE80211_STA_MLME_AUTHENTICATE:
2122 ieee80211_authenticate(sdata);
2124 case IEEE80211_STA_MLME_ASSOCIATE:
2125 ieee80211_associate(sdata);
2127 case IEEE80211_STA_MLME_ASSOCIATED:
2128 ieee80211_associated(sdata);
2136 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2138 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2140 * Need to update last_beacon to avoid beacon loss
2143 sdata->u.mgd.last_beacon = jiffies;
2146 queue_work(sdata->local->hw.workqueue,
2147 &sdata->u.mgd.work);
2152 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2154 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2157 * we need to use atomic bitops for the running bits
2158 * only because both timers might fire at the same
2159 * time -- the code here is properly synchronised.
2162 cancel_work_sync(&ifmgd->work);
2163 cancel_work_sync(&ifmgd->beacon_loss_work);
2164 if (del_timer_sync(&ifmgd->timer))
2165 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2167 cancel_work_sync(&ifmgd->chswitch_work);
2168 if (del_timer_sync(&ifmgd->chswitch_timer))
2169 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2172 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2174 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2176 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2177 add_timer(&ifmgd->timer);
2178 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2179 add_timer(&ifmgd->chswitch_timer);
2183 /* interface setup */
2184 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2186 struct ieee80211_if_managed *ifmgd;
2189 ifmgd = &sdata->u.mgd;
2190 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2191 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2192 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2193 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2194 (unsigned long) sdata);
2195 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2196 (unsigned long) sdata);
2197 skb_queue_head_init(&ifmgd->skb_queue);
2199 ifmgd->capab = WLAN_CAPABILITY_ESS;
2201 if (sdata->local->hw.queues >= 4)
2202 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2204 hw_flags = sdata->local->hw.flags;
2207 /* configuration hooks */
2208 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2210 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2211 struct ieee80211_local *local = sdata->local;
2213 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2216 if (WARN_ON(ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED))
2217 ieee80211_set_disassoc(sdata, true, true,
2218 WLAN_REASON_DEAUTH_LEAVING);
2220 if (WARN_ON(ifmgd->ssid_len == 0)) {
2222 * Only allow association to be started if a valid SSID
2228 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2229 queue_work(local->hw.workqueue, &ifmgd->work);
2232 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2233 const char *ie, size_t len)
2235 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2237 if (len == 0 && ifmgd->extra_ie_len == 0)
2240 if (len == ifmgd->extra_ie_len && ifmgd->extra_ie &&
2241 memcmp(ifmgd->extra_ie, ie, len) == 0)
2244 kfree(ifmgd->extra_ie);
2246 ifmgd->extra_ie = NULL;
2247 ifmgd->extra_ie_len = 0;
2250 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2251 if (!ifmgd->extra_ie) {
2252 ifmgd->extra_ie_len = 0;
2255 memcpy(ifmgd->extra_ie, ie, len);
2256 ifmgd->extra_ie_len = len;
2260 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2262 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2263 sdata->dev->name, reason);
2265 ieee80211_set_disassoc(sdata, true, true, reason);
2269 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2271 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2273 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2274 sdata->dev->name, reason);
2276 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2279 ieee80211_set_disassoc(sdata, false, true, reason);
2283 /* scan finished notification */
2284 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2286 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2288 /* Restart STA timers */
2290 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2291 ieee80211_restart_sta_timer(sdata);
2295 int ieee80211_max_network_latency(struct notifier_block *nb,
2296 unsigned long data, void *dummy)
2298 s32 latency_usec = (s32) data;
2299 struct ieee80211_local *local =
2300 container_of(nb, struct ieee80211_local,
2301 network_latency_notifier);
2303 mutex_lock(&local->iflist_mtx);
2304 ieee80211_recalc_ps(local, latency_usec);
2305 mutex_unlock(&local->iflist_mtx);