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_TKIP_WEP_USED))) {
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;
988 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
989 printk(KERN_DEBUG "%s: authentication with AP %pM"
991 sdata->dev->name, ifmgd->bssid);
992 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
993 ieee80211_recalc_idle(local);
994 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid,
996 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
997 sdata->local->hw.conf.channel->center_freq,
998 ifmgd->ssid, ifmgd->ssid_len);
1001 * We might have a pending scan which had no chance to run yet
1002 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
1003 * Hence, queue the STAs work again
1005 queue_work(local->hw.workqueue, &ifmgd->work);
1009 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1010 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
1011 sdata->dev->name, ifmgd->bssid);
1013 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1014 ies = ifmgd->sme_auth_ie;
1015 ies_len = ifmgd->sme_auth_ie_len;
1020 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
1022 ifmgd->auth_transaction = 2;
1024 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
1028 * The disassoc 'reason' argument can be either our own reason
1029 * if self disconnected or a reason code from the AP.
1031 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1032 bool deauth, bool self_disconnected,
1035 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1036 struct ieee80211_local *local = sdata->local;
1037 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
1038 struct ieee80211_bss *bss;
1039 struct sta_info *sta;
1040 u32 changed = 0, config_changed = 0;
1043 ifmgd->direct_probe_tries = 0;
1044 ifmgd->auth_tries = 0;
1046 ifmgd->assoc_scan_tries = 0;
1047 ifmgd->assoc_tries = 0;
1049 netif_tx_stop_all_queues(sdata->dev);
1050 netif_carrier_off(sdata->dev);
1053 sta = sta_info_get(local, ifmgd->bssid);
1055 ieee80211_sta_tear_down_BA_sessions(sta);
1058 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1059 conf->channel->center_freq,
1060 ifmgd->ssid, ifmgd->ssid_len);
1063 cfg80211_unhold_bss(&bss->cbss);
1064 ieee80211_rx_bss_put(local, bss);
1067 if (self_disconnected) {
1069 ieee80211_send_deauth_disassoc(sdata,
1070 IEEE80211_STYPE_DEAUTH, reason);
1072 ieee80211_send_deauth_disassoc(sdata,
1073 IEEE80211_STYPE_DISASSOC, reason);
1076 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1077 changed |= ieee80211_reset_erp_info(sdata);
1079 ieee80211_led_assoc(local, 0);
1080 changed |= BSS_CHANGED_ASSOC;
1081 sdata->vif.bss_conf.assoc = false;
1083 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1084 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1085 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1086 sdata->local->hw.conf.channel->center_freq,
1087 ifmgd->ssid, ifmgd->ssid_len);
1090 ieee80211_set_wmm_default(sdata);
1092 ieee80211_recalc_idle(local);
1094 /* channel(_type) changes are handled by ieee80211_hw_config */
1095 local->oper_channel_type = NL80211_CHAN_NO_HT;
1097 /* on the next assoc, re-program HT parameters */
1098 sdata->ht_opmode_valid = false;
1100 local->power_constr_level = 0;
1102 del_timer_sync(&local->dynamic_ps_timer);
1103 cancel_work_sync(&local->dynamic_ps_enable_work);
1105 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1106 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1107 config_changed |= IEEE80211_CONF_CHANGE_PS;
1110 ieee80211_hw_config(local, config_changed);
1112 /* And the BSSID changed -- not very interesting here */
1113 changed |= BSS_CHANGED_BSSID;
1114 ieee80211_bss_info_change_notify(sdata, changed);
1118 sta = sta_info_get(local, ifmgd->bssid);
1124 sta_info_unlink(&sta);
1128 sta_info_destroy(sta);
1131 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1133 if (!sdata || !sdata->default_key ||
1134 sdata->default_key->conf.alg != ALG_WEP)
1139 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1141 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1142 struct ieee80211_local *local = sdata->local;
1143 struct ieee80211_bss *bss;
1146 int privacy_invoked;
1148 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1151 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1152 local->hw.conf.channel->center_freq,
1153 ifmgd->ssid, ifmgd->ssid_len);
1157 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1158 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1159 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1161 ieee80211_rx_bss_put(local, bss);
1163 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1169 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1171 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1172 struct ieee80211_local *local = sdata->local;
1174 ifmgd->assoc_tries++;
1175 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1176 printk(KERN_DEBUG "%s: association with AP %pM"
1178 sdata->dev->name, ifmgd->bssid);
1179 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1180 ieee80211_recalc_idle(local);
1181 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid,
1183 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1184 sdata->local->hw.conf.channel->center_freq,
1185 ifmgd->ssid, ifmgd->ssid_len);
1187 * We might have a pending scan which had no chance to run yet
1188 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1189 * Hence, queue the STAs work again
1191 queue_work(local->hw.workqueue, &ifmgd->work);
1195 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1196 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1197 sdata->dev->name, ifmgd->bssid);
1198 if (ieee80211_privacy_mismatch(sdata)) {
1199 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1200 "mixed-cell disabled - abort association\n", sdata->dev->name);
1201 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1202 ieee80211_recalc_idle(local);
1206 ieee80211_send_assoc(sdata);
1208 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1211 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1212 struct ieee80211_hdr *hdr)
1215 * We can postpone the mgd.timer whenever receiving unicast frames
1216 * from AP because we know that the connection is working both ways
1217 * at that time. But multicast frames (and hence also beacons) must
1218 * be ignored here, because we need to trigger the timer during
1219 * data idle periods for sending the periodical probe request to
1222 if (!is_multicast_ether_addr(hdr->addr1))
1223 mod_timer(&sdata->u.mgd.timer,
1224 jiffies + IEEE80211_MONITORING_INTERVAL);
1227 void ieee80211_beacon_loss_work(struct work_struct *work)
1229 struct ieee80211_sub_if_data *sdata =
1230 container_of(work, struct ieee80211_sub_if_data,
1231 u.mgd.beacon_loss_work);
1232 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1235 * The driver has already reported this event and we have
1236 * already sent a probe request. Maybe the AP died and the
1237 * driver keeps reporting until we disassociate... We have
1238 * to ignore that because otherwise we would continually
1239 * reset the timer and never check whether we received a
1242 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1245 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1246 if (net_ratelimit()) {
1247 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1248 "- sending probe request\n", sdata->dev->name,
1249 sdata->u.mgd.bssid);
1253 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1255 mutex_lock(&sdata->local->iflist_mtx);
1256 ieee80211_recalc_ps(sdata->local, -1);
1257 mutex_unlock(&sdata->local->iflist_mtx);
1259 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1260 ifmgd->ssid_len, NULL, 0);
1262 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1265 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1267 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1269 queue_work(sdata->local->hw.workqueue,
1270 &sdata->u.mgd.beacon_loss_work);
1272 EXPORT_SYMBOL(ieee80211_beacon_loss);
1274 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1276 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1277 struct ieee80211_local *local = sdata->local;
1278 struct sta_info *sta;
1279 unsigned long last_rx;
1280 bool disassoc = false;
1282 /* TODO: start monitoring current AP signal quality and number of
1283 * missed beacons. Scan other channels every now and then and search
1284 * for better APs. */
1285 /* TODO: remove expired BSSes */
1287 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1291 sta = sta_info_get(local, ifmgd->bssid);
1293 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1294 sdata->dev->name, ifmgd->bssid);
1300 last_rx = sta->last_rx;
1303 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1304 time_after(jiffies, last_rx + IEEE80211_PROBE_WAIT)) {
1305 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1306 "- disassociating\n",
1307 sdata->dev->name, ifmgd->bssid);
1309 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1314 * Beacon filtering is only enabled with power save and then the
1315 * stack should not check for beacon loss.
1317 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1318 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1320 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1321 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1322 if (net_ratelimit()) {
1323 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1324 "- sending probe request\n",
1325 sdata->dev->name, ifmgd->bssid);
1328 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1329 mutex_lock(&local->iflist_mtx);
1330 ieee80211_recalc_ps(local, -1);
1331 mutex_unlock(&local->iflist_mtx);
1332 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1333 ifmgd->ssid_len, NULL, 0);
1334 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1338 if (time_after(jiffies, last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1339 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1340 mutex_lock(&local->iflist_mtx);
1341 ieee80211_recalc_ps(local, -1);
1342 mutex_unlock(&local->iflist_mtx);
1343 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1344 ifmgd->ssid_len, NULL, 0);
1349 mod_timer(&ifmgd->timer,
1350 jiffies + IEEE80211_MONITORING_INTERVAL);
1352 ieee80211_set_disassoc(sdata, true, true,
1353 WLAN_REASON_PREV_AUTH_NOT_VALID);
1357 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1359 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1361 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1362 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1363 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1364 /* Wait for SME to request association */
1365 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1366 ieee80211_recalc_idle(sdata->local);
1368 ieee80211_associate(sdata);
1372 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1373 struct ieee80211_mgmt *mgmt,
1377 struct ieee802_11_elems elems;
1379 pos = mgmt->u.auth.variable;
1380 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1381 if (!elems.challenge)
1383 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1384 elems.challenge - 2, elems.challenge_len + 2,
1385 sdata->u.mgd.bssid, 1);
1386 sdata->u.mgd.auth_transaction = 4;
1389 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1390 struct ieee80211_mgmt *mgmt,
1393 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1394 u16 auth_alg, auth_transaction, status_code;
1396 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1402 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1405 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1408 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1409 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1410 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1412 if (auth_alg != ifmgd->auth_alg ||
1413 auth_transaction != ifmgd->auth_transaction)
1416 if (status_code != WLAN_STATUS_SUCCESS) {
1417 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1419 const int num_algs = ARRAY_SIZE(algs);
1421 algs[0] = algs[1] = algs[2] = 0xff;
1422 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1423 algs[0] = WLAN_AUTH_OPEN;
1424 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1425 algs[1] = WLAN_AUTH_SHARED_KEY;
1426 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1427 algs[2] = WLAN_AUTH_LEAP;
1428 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1430 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1434 for (i = 0; i < num_algs; i++) {
1436 if (pos >= num_algs)
1438 if (algs[pos] == ifmgd->auth_alg ||
1441 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1442 !ieee80211_sta_wep_configured(sdata))
1444 ifmgd->auth_alg = algs[pos];
1445 ifmgd->auth_tries = 0;
1449 /* nothing else to try -- give up */
1450 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len,
1452 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1453 ieee80211_recalc_idle(sdata->local);
1457 switch (ifmgd->auth_alg) {
1458 case WLAN_AUTH_OPEN:
1459 case WLAN_AUTH_LEAP:
1461 ieee80211_auth_completed(sdata);
1462 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len,
1465 case WLAN_AUTH_SHARED_KEY:
1466 if (ifmgd->auth_transaction == 4) {
1467 ieee80211_auth_completed(sdata);
1468 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len,
1471 ieee80211_auth_challenge(sdata, mgmt, len);
1477 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1478 struct ieee80211_mgmt *mgmt,
1481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1487 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1490 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1492 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1493 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1494 sdata->dev->name, reason_code);
1496 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1497 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1498 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1499 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1500 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1501 mod_timer(&ifmgd->timer, jiffies +
1502 IEEE80211_RETRY_AUTH_INTERVAL);
1505 ieee80211_set_disassoc(sdata, true, false, 0);
1506 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1507 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL);
1511 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1512 struct ieee80211_mgmt *mgmt,
1515 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1521 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1524 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1526 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1527 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1528 sdata->dev->name, reason_code);
1530 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1531 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1532 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1533 mod_timer(&ifmgd->timer, jiffies +
1534 IEEE80211_RETRY_AUTH_INTERVAL);
1537 ieee80211_set_disassoc(sdata, false, false, reason_code);
1538 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL);
1542 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1543 struct ieee80211_mgmt *mgmt,
1547 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1548 struct ieee80211_local *local = sdata->local;
1549 struct ieee80211_supported_band *sband;
1550 struct sta_info *sta;
1551 u32 rates, basic_rates;
1552 u16 capab_info, status_code, aid;
1553 struct ieee802_11_elems elems;
1554 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1558 bool have_higher_than_11mbit = false, newsta = false;
1559 u16 ap_ht_cap_flags;
1561 /* AssocResp and ReassocResp have identical structure, so process both
1562 * of them in this function. */
1564 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1570 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1573 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1574 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1575 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1577 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1578 "status=%d aid=%d)\n",
1579 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1580 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1582 pos = mgmt->u.assoc_resp.variable;
1583 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1585 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1586 elems.timeout_int && elems.timeout_int_len == 5 &&
1587 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1589 tu = get_unaligned_le32(elems.timeout_int + 1);
1590 ms = tu * 1024 / 1000;
1591 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1592 "comeback duration %u TU (%u ms)\n",
1593 sdata->dev->name, tu, ms);
1594 if (ms > IEEE80211_ASSOC_TIMEOUT)
1595 mod_timer(&ifmgd->timer,
1596 jiffies + msecs_to_jiffies(ms));
1600 if (status_code != WLAN_STATUS_SUCCESS) {
1601 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1602 sdata->dev->name, status_code);
1603 /* if this was a reassociation, ensure we try a "full"
1604 * association next time. This works around some broken APs
1605 * which do not correctly reject reassociation requests. */
1606 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1607 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len,
1609 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1610 /* Wait for SME to decide what to do next */
1611 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1612 ieee80211_recalc_idle(local);
1617 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1618 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1619 "set\n", sdata->dev->name, aid);
1620 aid &= ~(BIT(15) | BIT(14));
1622 if (!elems.supp_rates) {
1623 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1628 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1630 ifmgd->ap_capab = capab_info;
1632 kfree(ifmgd->assocresp_ies);
1633 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1634 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1635 if (ifmgd->assocresp_ies)
1636 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1640 /* Add STA entry for the AP */
1641 sta = sta_info_get(local, ifmgd->bssid);
1645 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1647 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1648 " the AP\n", sdata->dev->name);
1653 /* update new sta with its last rx activity */
1654 sta->last_rx = jiffies;
1658 * FIXME: Do we really need to update the sta_info's information here?
1659 * We already know about the AP (we found it in our list) so it
1660 * should already be filled with the right info, no?
1661 * As is stands, all this is racy because typically we assume
1662 * the information that is filled in here (except flags) doesn't
1663 * change while a STA structure is alive. As such, it should move
1664 * to between the sta_info_alloc() and sta_info_insert() above.
1667 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP);
1668 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1669 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1673 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1675 for (i = 0; i < elems.supp_rates_len; i++) {
1676 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1677 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1680 have_higher_than_11mbit = true;
1682 for (j = 0; j < sband->n_bitrates; j++) {
1683 if (sband->bitrates[j].bitrate == rate) {
1686 basic_rates |= BIT(j);
1692 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1693 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1694 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1697 have_higher_than_11mbit = true;
1699 for (j = 0; j < sband->n_bitrates; j++) {
1700 if (sband->bitrates[j].bitrate == rate) {
1703 basic_rates |= BIT(j);
1709 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1710 sdata->vif.bss_conf.basic_rates = basic_rates;
1712 /* cf. IEEE 802.11 9.2.12 */
1713 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1714 have_higher_than_11mbit)
1715 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1717 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1719 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1720 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1721 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1722 elems.ht_cap_elem, &sta->sta.ht_cap);
1724 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1726 rate_control_rate_init(sta);
1728 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1729 set_sta_flags(sta, WLAN_STA_MFP);
1731 if (elems.wmm_param)
1732 set_sta_flags(sta, WLAN_STA_WME);
1735 int err = sta_info_insert(sta);
1737 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1738 " the AP (error %d)\n", sdata->dev->name, err);
1746 if (elems.wmm_param)
1747 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1748 elems.wmm_param_len);
1750 ieee80211_set_wmm_default(sdata);
1752 if (elems.ht_info_elem && elems.wmm_param &&
1753 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1754 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1755 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1758 /* set AID and assoc capability,
1759 * ieee80211_set_associated() will tell the driver */
1760 bss_conf->aid = aid;
1761 bss_conf->assoc_capability = capab_info;
1762 ieee80211_set_associated(sdata, changed);
1765 * initialise the time of last beacon to be the association time,
1766 * otherwise beacon loss check will trigger immediately
1768 ifmgd->last_beacon = jiffies;
1770 ieee80211_associated(sdata);
1771 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL);
1775 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1776 struct ieee80211_mgmt *mgmt,
1778 struct ieee80211_rx_status *rx_status,
1779 struct ieee802_11_elems *elems,
1782 struct ieee80211_local *local = sdata->local;
1784 struct ieee80211_bss *bss;
1785 struct ieee80211_channel *channel;
1787 if (elems->ds_params && elems->ds_params_len == 1)
1788 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1790 freq = rx_status->freq;
1792 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1794 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1797 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1802 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1803 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1804 struct ieee80211_channel_sw_ie *sw_elem =
1805 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1806 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1809 ieee80211_rx_bss_put(local, bss);
1813 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1814 struct ieee80211_mgmt *mgmt,
1816 struct ieee80211_rx_status *rx_status)
1818 struct ieee80211_if_managed *ifmgd;
1820 struct ieee802_11_elems elems;
1822 ifmgd = &sdata->u.mgd;
1824 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1825 return; /* ignore ProbeResp to foreign address */
1827 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1831 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1834 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1836 /* direct probe may be part of the association flow */
1837 if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
1838 printk(KERN_DEBUG "%s direct probe responded\n",
1840 ieee80211_authenticate(sdata);
1843 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1844 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1845 mutex_lock(&sdata->local->iflist_mtx);
1846 ieee80211_recalc_ps(sdata->local, -1);
1847 mutex_unlock(&sdata->local->iflist_mtx);
1852 * This is the canonical list of information elements we care about,
1853 * the filter code also gives us all changes to the Microsoft OUI
1854 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1856 * We implement beacon filtering in software since that means we can
1857 * avoid processing the frame here and in cfg80211, and userspace
1858 * will not be able to tell whether the hardware supports it or not.
1860 * XXX: This list needs to be dynamic -- userspace needs to be able to
1861 * add items it requires. It also needs to be able to tell us to
1862 * look out for other vendor IEs.
1864 static const u64 care_about_ies =
1865 (1ULL << WLAN_EID_COUNTRY) |
1866 (1ULL << WLAN_EID_ERP_INFO) |
1867 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1868 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1869 (1ULL << WLAN_EID_HT_CAPABILITY) |
1870 (1ULL << WLAN_EID_HT_INFORMATION);
1872 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1873 struct ieee80211_mgmt *mgmt,
1875 struct ieee80211_rx_status *rx_status)
1877 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1879 struct ieee802_11_elems elems;
1880 struct ieee80211_local *local = sdata->local;
1882 bool erp_valid, directed_tim = false;
1886 /* Process beacon from the current BSS */
1887 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1891 if (rx_status->freq != local->hw.conf.channel->center_freq)
1894 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1895 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1898 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1899 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1900 if (net_ratelimit()) {
1901 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1902 "to a received beacon\n", sdata->dev->name);
1905 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1906 mutex_lock(&local->iflist_mtx);
1907 ieee80211_recalc_ps(local, -1);
1908 mutex_unlock(&local->iflist_mtx);
1911 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1912 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1913 len - baselen, &elems,
1914 care_about_ies, ncrc);
1916 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1917 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1920 if (ncrc != ifmgd->beacon_crc) {
1921 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1924 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1925 elems.wmm_param_len);
1928 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1930 if (local->hw.conf.dynamic_ps_timeout > 0) {
1931 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1932 ieee80211_hw_config(local,
1933 IEEE80211_CONF_CHANGE_PS);
1934 ieee80211_send_nullfunc(local, sdata, 0);
1936 local->pspolling = true;
1939 * Here is assumed that the driver will be
1940 * able to send ps-poll frame and receive a
1941 * response even though power save mode is
1942 * enabled, but some drivers might require
1943 * to disable power save here. This needs
1944 * to be investigated.
1946 ieee80211_send_pspoll(local, sdata);
1951 if (ncrc == ifmgd->beacon_crc)
1953 ifmgd->beacon_crc = ncrc;
1955 if (elems.erp_info && elems.erp_info_len >= 1) {
1957 erp_value = elems.erp_info[0];
1961 changed |= ieee80211_handle_bss_capability(sdata,
1962 le16_to_cpu(mgmt->u.beacon.capab_info),
1963 erp_valid, erp_value);
1966 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1967 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1968 struct sta_info *sta;
1969 struct ieee80211_supported_band *sband;
1970 u16 ap_ht_cap_flags;
1974 sta = sta_info_get(local, ifmgd->bssid);
1980 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1982 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1983 elems.ht_cap_elem, &sta->sta.ht_cap);
1985 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1989 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1993 if (elems.country_elem) {
1994 /* Note we are only reviewing this on beacons
1995 * for the BSSID we are associated to */
1996 regulatory_hint_11d(local->hw.wiphy,
1997 elems.country_elem, elems.country_elem_len);
1999 /* TODO: IBSS also needs this */
2000 if (elems.pwr_constr_elem)
2001 ieee80211_handle_pwr_constr(sdata,
2002 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2003 elems.pwr_constr_elem,
2004 elems.pwr_constr_elem_len);
2007 ieee80211_bss_info_change_notify(sdata, changed);
2010 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
2011 struct sk_buff *skb)
2013 struct ieee80211_local *local = sdata->local;
2014 struct ieee80211_mgmt *mgmt;
2018 return RX_DROP_MONITOR;
2020 mgmt = (struct ieee80211_mgmt *) skb->data;
2021 fc = le16_to_cpu(mgmt->frame_control);
2023 switch (fc & IEEE80211_FCTL_STYPE) {
2024 case IEEE80211_STYPE_PROBE_REQ:
2025 case IEEE80211_STYPE_PROBE_RESP:
2026 case IEEE80211_STYPE_BEACON:
2027 case IEEE80211_STYPE_AUTH:
2028 case IEEE80211_STYPE_ASSOC_RESP:
2029 case IEEE80211_STYPE_REASSOC_RESP:
2030 case IEEE80211_STYPE_DEAUTH:
2031 case IEEE80211_STYPE_DISASSOC:
2032 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
2033 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
2037 return RX_DROP_MONITOR;
2040 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2041 struct sk_buff *skb)
2043 struct ieee80211_rx_status *rx_status;
2044 struct ieee80211_mgmt *mgmt;
2047 rx_status = (struct ieee80211_rx_status *) skb->cb;
2048 mgmt = (struct ieee80211_mgmt *) skb->data;
2049 fc = le16_to_cpu(mgmt->frame_control);
2051 switch (fc & IEEE80211_FCTL_STYPE) {
2052 case IEEE80211_STYPE_PROBE_RESP:
2053 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
2056 case IEEE80211_STYPE_BEACON:
2057 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2060 case IEEE80211_STYPE_AUTH:
2061 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2063 case IEEE80211_STYPE_ASSOC_RESP:
2064 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
2066 case IEEE80211_STYPE_REASSOC_RESP:
2067 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
2069 case IEEE80211_STYPE_DEAUTH:
2070 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2072 case IEEE80211_STYPE_DISASSOC:
2073 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2080 static void ieee80211_sta_timer(unsigned long data)
2082 struct ieee80211_sub_if_data *sdata =
2083 (struct ieee80211_sub_if_data *) data;
2084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2085 struct ieee80211_local *local = sdata->local;
2087 if (local->quiescing) {
2088 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2092 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2093 queue_work(local->hw.workqueue, &ifmgd->work);
2096 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
2098 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2099 struct ieee80211_local *local = sdata->local;
2101 /* Reset own TSF to allow time synchronization work. */
2102 drv_reset_tsf(local);
2104 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
2107 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2108 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2109 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2110 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
2111 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2112 ifmgd->auth_alg = WLAN_AUTH_LEAP;
2113 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
2114 ifmgd->auth_alg = WLAN_AUTH_FT;
2116 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2117 ifmgd->auth_transaction = -1;
2118 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2119 ifmgd->assoc_scan_tries = 0;
2120 ifmgd->direct_probe_tries = 0;
2121 ifmgd->auth_tries = 0;
2122 ifmgd->assoc_tries = 0;
2123 netif_tx_stop_all_queues(sdata->dev);
2124 netif_carrier_off(sdata->dev);
2127 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2130 struct ieee80211_local *local = sdata->local;
2131 struct ieee80211_bss *bss;
2132 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2133 u8 ssid_len = ifmgd->ssid_len;
2134 u16 capa_mask = WLAN_CAPABILITY_ESS;
2135 u16 capa_val = WLAN_CAPABILITY_ESS;
2136 struct ieee80211_channel *chan = local->oper_channel;
2138 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2139 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2140 IEEE80211_STA_AUTO_BSSID_SEL |
2141 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2142 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2143 if (sdata->default_key)
2144 capa_val |= WLAN_CAPABILITY_PRIVACY;
2147 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2150 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2153 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2158 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2159 bssid, ssid, ssid_len,
2160 capa_mask, capa_val);
2163 local->oper_channel = bss->cbss.channel;
2164 local->oper_channel_type = NL80211_CHAN_NO_HT;
2165 ieee80211_hw_config(local, 0);
2167 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2168 ieee80211_sta_set_ssid(sdata, bss->ssid,
2170 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2171 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2173 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2174 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2176 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2178 /* Send out direct probe if no probe resp was received or
2179 * the one we have is outdated
2181 if (!bss->last_probe_resp ||
2182 time_after(jiffies, bss->last_probe_resp
2183 + IEEE80211_SCAN_RESULT_EXPIRE))
2184 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2186 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2188 ieee80211_rx_bss_put(local, bss);
2189 ieee80211_sta_reset_auth(sdata);
2192 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2194 ifmgd->assoc_scan_tries++;
2196 ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2199 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2200 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2202 ifmgd->assoc_scan_tries = 0;
2203 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2204 ieee80211_recalc_idle(local);
2211 static void ieee80211_sta_work(struct work_struct *work)
2213 struct ieee80211_sub_if_data *sdata =
2214 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2215 struct ieee80211_local *local = sdata->local;
2216 struct ieee80211_if_managed *ifmgd;
2217 struct sk_buff *skb;
2219 if (!netif_running(sdata->dev))
2222 if (local->sw_scanning || local->hw_scanning)
2225 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2229 * Nothing should have been stuffed into the workqueue during
2230 * the suspend->resume cycle. If this WARN is seen then there
2231 * is a bug with either the driver suspend or something in
2232 * mac80211 stuffing into the workqueue which we haven't yet
2233 * cleared during mac80211's suspend cycle.
2235 if (WARN_ON(local->suspended))
2238 ifmgd = &sdata->u.mgd;
2240 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2241 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2243 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2244 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2245 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2246 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2247 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2248 round_jiffies_relative(0));
2252 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2253 if (ieee80211_sta_config_auth(sdata))
2255 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2256 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2259 ieee80211_recalc_idle(local);
2261 switch (ifmgd->state) {
2262 case IEEE80211_STA_MLME_DISABLED:
2264 case IEEE80211_STA_MLME_DIRECT_PROBE:
2265 ieee80211_direct_probe(sdata);
2267 case IEEE80211_STA_MLME_AUTHENTICATE:
2268 ieee80211_authenticate(sdata);
2270 case IEEE80211_STA_MLME_ASSOCIATE:
2271 ieee80211_associate(sdata);
2273 case IEEE80211_STA_MLME_ASSOCIATED:
2274 ieee80211_associated(sdata);
2281 if (ieee80211_privacy_mismatch(sdata)) {
2282 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2283 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2285 ieee80211_set_disassoc(sdata, false, true,
2286 WLAN_REASON_UNSPECIFIED);
2290 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2292 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2294 * Need to update last_beacon to avoid beacon loss
2297 sdata->u.mgd.last_beacon = jiffies;
2300 queue_work(sdata->local->hw.workqueue,
2301 &sdata->u.mgd.work);
2306 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2308 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2311 * we need to use atomic bitops for the running bits
2312 * only because both timers might fire at the same
2313 * time -- the code here is properly synchronised.
2316 cancel_work_sync(&ifmgd->work);
2317 cancel_work_sync(&ifmgd->beacon_loss_work);
2318 if (del_timer_sync(&ifmgd->timer))
2319 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2321 cancel_work_sync(&ifmgd->chswitch_work);
2322 if (del_timer_sync(&ifmgd->chswitch_timer))
2323 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2326 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2328 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2330 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2331 add_timer(&ifmgd->timer);
2332 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2333 add_timer(&ifmgd->chswitch_timer);
2337 /* interface setup */
2338 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2340 struct ieee80211_if_managed *ifmgd;
2343 ifmgd = &sdata->u.mgd;
2344 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2345 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2346 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2347 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2348 (unsigned long) sdata);
2349 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2350 (unsigned long) sdata);
2351 skb_queue_head_init(&ifmgd->skb_queue);
2353 ifmgd->capab = WLAN_CAPABILITY_ESS;
2354 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2355 IEEE80211_AUTH_ALG_SHARED_KEY;
2356 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
2357 IEEE80211_STA_AUTO_BSSID_SEL |
2358 IEEE80211_STA_AUTO_CHANNEL_SEL;
2359 if (sdata->local->hw.queues >= 4)
2360 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2362 hw_flags = sdata->local->hw.flags;
2364 if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2365 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2366 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2370 /* configuration hooks */
2371 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2373 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2374 struct ieee80211_local *local = sdata->local;
2376 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2379 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
2380 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2381 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
2382 IEEE80211_STA_AUTO_SSID_SEL))) {
2384 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2385 ieee80211_set_disassoc(sdata, true, true,
2386 WLAN_REASON_DEAUTH_LEAVING);
2388 if (ifmgd->ssid_len == 0) {
2390 * Only allow association to be started if a valid SSID
2396 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2397 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2398 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2399 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2400 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2401 queue_work(local->hw.workqueue, &ifmgd->work);
2405 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2407 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2409 if (ifmgd->ssid_len)
2410 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2412 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2417 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2419 struct ieee80211_if_managed *ifmgd;
2421 if (len > IEEE80211_MAX_SSID_LEN)
2424 ifmgd = &sdata->u.mgd;
2426 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2427 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2428 ieee80211_set_disassoc(sdata, true, true,
2429 WLAN_REASON_DEAUTH_LEAVING);
2432 * Do not use reassociation if SSID is changed (different ESS).
2434 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2435 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2436 memcpy(ifmgd->ssid, ssid, len);
2437 ifmgd->ssid_len = len;
2440 return ieee80211_sta_commit(sdata);
2443 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2445 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2446 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2447 *len = ifmgd->ssid_len;
2451 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2453 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2455 if (compare_ether_addr(bssid, ifmgd->bssid) != 0 &&
2456 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2457 ieee80211_set_disassoc(sdata, true, true,
2458 WLAN_REASON_DEAUTH_LEAVING);
2460 if (is_valid_ether_addr(bssid)) {
2461 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2462 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2464 memset(ifmgd->bssid, 0, ETH_ALEN);
2465 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2468 return ieee80211_sta_commit(sdata);
2471 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2472 const char *ie, size_t len)
2474 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2476 if (len == 0 && ifmgd->extra_ie_len == 0)
2479 if (len == ifmgd->extra_ie_len && ifmgd->extra_ie &&
2480 memcmp(ifmgd->extra_ie, ie, len) == 0)
2483 kfree(ifmgd->extra_ie);
2485 ifmgd->extra_ie = NULL;
2486 ifmgd->extra_ie_len = 0;
2489 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2490 if (!ifmgd->extra_ie) {
2491 ifmgd->extra_ie_len = 0;
2494 memcpy(ifmgd->extra_ie, ie, len);
2495 ifmgd->extra_ie_len = len;
2499 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2501 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2502 sdata->dev->name, reason);
2504 ieee80211_set_disassoc(sdata, true, true, reason);
2508 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2510 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2512 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2513 sdata->dev->name, reason);
2515 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2518 ieee80211_set_disassoc(sdata, false, true, reason);
2522 /* scan finished notification */
2523 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2525 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2527 /* Restart STA timers */
2529 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2530 ieee80211_restart_sta_timer(sdata);
2534 int ieee80211_max_network_latency(struct notifier_block *nb,
2535 unsigned long data, void *dummy)
2537 s32 latency_usec = (s32) data;
2538 struct ieee80211_local *local =
2539 container_of(nb, struct ieee80211_local,
2540 network_latency_notifier);
2542 mutex_lock(&local->iflist_mtx);
2543 ieee80211_recalc_ps(local, latency_usec);
2544 mutex_unlock(&local->iflist_mtx);