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 / 20)
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);
424 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len);
425 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
428 void ieee80211_send_pspoll(struct ieee80211_local *local,
429 struct ieee80211_sub_if_data *sdata)
431 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
432 struct ieee80211_pspoll *pspoll;
436 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
438 printk(KERN_DEBUG "%s: failed to allocate buffer for "
439 "pspoll frame\n", sdata->dev->name);
442 skb_reserve(skb, local->hw.extra_tx_headroom);
444 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
445 memset(pspoll, 0, sizeof(*pspoll));
446 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
447 pspoll->frame_control = cpu_to_le16(fc);
448 pspoll->aid = cpu_to_le16(ifmgd->aid);
450 /* aid in PS-Poll has its two MSBs each set to 1 */
451 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
453 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
454 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
456 ieee80211_tx_skb(sdata, skb, 0);
459 void ieee80211_send_nullfunc(struct ieee80211_local *local,
460 struct ieee80211_sub_if_data *sdata,
464 struct ieee80211_hdr *nullfunc;
467 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
470 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
472 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
473 "frame\n", sdata->dev->name);
476 skb_reserve(skb, local->hw.extra_tx_headroom);
478 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
479 memset(nullfunc, 0, 24);
480 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
481 IEEE80211_FCTL_TODS);
483 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
484 nullfunc->frame_control = fc;
485 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
486 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
487 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
489 ieee80211_tx_skb(sdata, skb, 0);
492 /* spectrum management related things */
493 static void ieee80211_chswitch_work(struct work_struct *work)
495 struct ieee80211_sub_if_data *sdata =
496 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
497 struct ieee80211_bss *bss;
498 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
500 if (!netif_running(sdata->dev))
503 bss = ieee80211_rx_bss_get(sdata->local, ifmgd->bssid,
504 sdata->local->hw.conf.channel->center_freq,
505 ifmgd->ssid, ifmgd->ssid_len);
509 sdata->local->oper_channel = sdata->local->csa_channel;
510 /* XXX: shouldn't really modify cfg80211-owned data! */
511 if (!ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL))
512 bss->cbss.channel = sdata->local->oper_channel;
514 ieee80211_rx_bss_put(sdata->local, bss);
516 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
517 ieee80211_wake_queues_by_reason(&sdata->local->hw,
518 IEEE80211_QUEUE_STOP_REASON_CSA);
521 static void ieee80211_chswitch_timer(unsigned long data)
523 struct ieee80211_sub_if_data *sdata =
524 (struct ieee80211_sub_if_data *) data;
525 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
527 if (sdata->local->quiescing) {
528 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
532 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
535 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
536 struct ieee80211_channel_sw_ie *sw_elem,
537 struct ieee80211_bss *bss)
539 struct ieee80211_channel *new_ch;
540 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
541 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
543 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATED)
546 if (sdata->local->sw_scanning || sdata->local->hw_scanning)
549 /* Disregard subsequent beacons if we are already running a timer
552 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
555 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
556 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
559 sdata->local->csa_channel = new_ch;
561 if (sw_elem->count <= 1) {
562 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
564 ieee80211_stop_queues_by_reason(&sdata->local->hw,
565 IEEE80211_QUEUE_STOP_REASON_CSA);
566 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
567 mod_timer(&ifmgd->chswitch_timer,
569 msecs_to_jiffies(sw_elem->count *
570 bss->cbss.beacon_interval));
574 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
575 u16 capab_info, u8 *pwr_constr_elem,
576 u8 pwr_constr_elem_len)
578 struct ieee80211_conf *conf = &sdata->local->hw.conf;
580 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
583 /* Power constraint IE length should be 1 octet */
584 if (pwr_constr_elem_len != 1)
587 if ((*pwr_constr_elem <= conf->channel->max_power) &&
588 (*pwr_constr_elem != sdata->local->power_constr_level)) {
589 sdata->local->power_constr_level = *pwr_constr_elem;
590 ieee80211_hw_config(sdata->local, 0);
595 static void ieee80211_enable_ps(struct ieee80211_local *local,
596 struct ieee80211_sub_if_data *sdata)
598 struct ieee80211_conf *conf = &local->hw.conf;
601 * If we are scanning right now then the parameters will
602 * take effect when scan finishes.
604 if (local->hw_scanning || local->sw_scanning)
607 if (conf->dynamic_ps_timeout > 0 &&
608 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
609 mod_timer(&local->dynamic_ps_timer, jiffies +
610 msecs_to_jiffies(conf->dynamic_ps_timeout));
612 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
613 ieee80211_send_nullfunc(local, sdata, 1);
614 conf->flags |= IEEE80211_CONF_PS;
615 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
619 static void ieee80211_change_ps(struct ieee80211_local *local)
621 struct ieee80211_conf *conf = &local->hw.conf;
623 if (local->ps_sdata) {
624 if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED))
627 ieee80211_enable_ps(local, local->ps_sdata);
628 } else if (conf->flags & IEEE80211_CONF_PS) {
629 conf->flags &= ~IEEE80211_CONF_PS;
630 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
631 del_timer_sync(&local->dynamic_ps_timer);
632 cancel_work_sync(&local->dynamic_ps_enable_work);
636 /* need to hold RTNL or interface lock */
637 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
639 struct ieee80211_sub_if_data *sdata, *found = NULL;
642 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
643 local->ps_sdata = NULL;
647 list_for_each_entry(sdata, &local->interfaces, list) {
648 if (!netif_running(sdata->dev))
650 if (sdata->vif.type != NL80211_IFTYPE_STATION)
656 if (count == 1 && found->u.mgd.powersave) {
660 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
662 beaconint_us = ieee80211_tu_to_usec(
663 found->vif.bss_conf.beacon_int);
665 if (beaconint_us > latency) {
666 local->ps_sdata = NULL;
668 u8 dtimper = found->vif.bss_conf.dtim_period;
672 maxslp = min_t(int, dtimper,
673 latency / beaconint_us);
675 local->hw.conf.max_sleep_period = maxslp;
676 local->ps_sdata = found;
679 local->ps_sdata = NULL;
682 ieee80211_change_ps(local);
685 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
687 struct ieee80211_local *local =
688 container_of(work, struct ieee80211_local,
689 dynamic_ps_disable_work);
691 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
692 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
693 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
696 ieee80211_wake_queues_by_reason(&local->hw,
697 IEEE80211_QUEUE_STOP_REASON_PS);
700 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
702 struct ieee80211_local *local =
703 container_of(work, struct ieee80211_local,
704 dynamic_ps_enable_work);
705 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
707 /* can only happen when PS was just disabled anyway */
711 if (local->hw.conf.flags & IEEE80211_CONF_PS)
714 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
715 ieee80211_send_nullfunc(local, sdata, 1);
717 local->hw.conf.flags |= IEEE80211_CONF_PS;
718 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
721 void ieee80211_dynamic_ps_timer(unsigned long data)
723 struct ieee80211_local *local = (void *) data;
725 if (local->quiescing)
728 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
732 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
733 struct ieee80211_if_managed *ifmgd,
734 u8 *wmm_param, size_t wmm_param_len)
736 struct ieee80211_tx_queue_params params;
741 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
747 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
749 count = wmm_param[6] & 0x0f;
750 if (count == ifmgd->wmm_last_param_set)
752 ifmgd->wmm_last_param_set = count;
755 left = wmm_param_len - 8;
757 memset(¶ms, 0, sizeof(params));
760 for (; left >= 4; left -= 4, pos += 4) {
761 int aci = (pos[0] >> 5) & 0x03;
762 int acm = (pos[0] >> 4) & 0x01;
769 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
774 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
779 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
785 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
789 params.aifs = pos[0] & 0x0f;
790 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
791 params.cw_min = ecw2cw(pos[1] & 0x0f);
792 params.txop = get_unaligned_le16(pos + 2);
793 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
794 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
795 "cWmin=%d cWmax=%d txop=%d\n",
796 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
797 params.cw_max, params.txop);
799 if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx)
800 printk(KERN_DEBUG "%s: failed to set TX queue "
801 "parameters for queue %d\n", local->mdev->name,
806 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
807 u16 capab, bool erp_valid, u8 erp)
809 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
810 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
811 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
815 bool use_short_preamble;
819 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
820 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
822 use_protection = false;
823 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
826 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
828 if (use_protection != bss_conf->use_cts_prot) {
829 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
830 if (net_ratelimit()) {
831 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
833 use_protection ? "enabled" : "disabled",
837 bss_conf->use_cts_prot = use_protection;
838 changed |= BSS_CHANGED_ERP_CTS_PROT;
841 if (use_short_preamble != bss_conf->use_short_preamble) {
842 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
843 if (net_ratelimit()) {
844 printk(KERN_DEBUG "%s: switched to %s barker preamble"
847 use_short_preamble ? "short" : "long",
851 bss_conf->use_short_preamble = use_short_preamble;
852 changed |= BSS_CHANGED_ERP_PREAMBLE;
855 if (use_short_slot != bss_conf->use_short_slot) {
856 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
857 if (net_ratelimit()) {
858 printk(KERN_DEBUG "%s: switched to %s slot time"
861 use_short_slot ? "short" : "long",
865 bss_conf->use_short_slot = use_short_slot;
866 changed |= BSS_CHANGED_ERP_SLOT;
872 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
874 union iwreq_data wrqu;
876 memset(&wrqu, 0, sizeof(wrqu));
877 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
878 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
879 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
880 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
883 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
889 union iwreq_data wrqu;
891 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
894 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
895 ifmgd->assocresp_ies_len), GFP_KERNEL);
899 len = sprintf(buf, "ASSOCINFO(");
900 if (ifmgd->assocreq_ies) {
901 len += sprintf(buf + len, "ReqIEs=");
902 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
903 len += sprintf(buf + len, "%02x",
904 ifmgd->assocreq_ies[i]);
907 if (ifmgd->assocresp_ies) {
908 if (ifmgd->assocreq_ies)
909 len += sprintf(buf + len, " ");
910 len += sprintf(buf + len, "RespIEs=");
911 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
912 len += sprintf(buf + len, "%02x",
913 ifmgd->assocresp_ies[i]);
916 len += sprintf(buf + len, ")");
918 if (len > IW_CUSTOM_MAX) {
919 len = sprintf(buf, "ASSOCRESPIE=");
920 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
921 len += sprintf(buf + len, "%02x",
922 ifmgd->assocresp_ies[i]);
926 if (len <= IW_CUSTOM_MAX) {
927 memset(&wrqu, 0, sizeof(wrqu));
928 wrqu.data.length = len;
929 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
936 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
937 u32 bss_info_changed)
939 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
940 struct ieee80211_local *local = sdata->local;
941 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
943 struct ieee80211_bss *bss;
945 bss_info_changed |= BSS_CHANGED_ASSOC;
946 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
948 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
949 conf->channel->center_freq,
950 ifmgd->ssid, ifmgd->ssid_len);
952 /* set timing information */
953 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
954 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
955 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
957 bss_info_changed |= BSS_CHANGED_BEACON_INT;
958 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
959 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
961 cfg80211_hold_bss(&bss->cbss);
963 ieee80211_rx_bss_put(local, bss);
966 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
967 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
968 ieee80211_sta_send_associnfo(sdata);
970 ifmgd->last_probe = jiffies;
971 ieee80211_led_assoc(local, 1);
973 sdata->vif.bss_conf.assoc = 1;
975 * For now just always ask the driver to update the basic rateset
976 * when we have associated, we aren't checking whether it actually
979 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
980 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
982 /* will be same as sdata */
983 if (local->ps_sdata) {
984 mutex_lock(&local->iflist_mtx);
985 ieee80211_recalc_ps(local, -1);
986 mutex_unlock(&local->iflist_mtx);
989 netif_tx_start_all_queues(sdata->dev);
990 netif_carrier_on(sdata->dev);
992 ieee80211_sta_send_apinfo(sdata);
995 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
997 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
998 struct ieee80211_local *local = sdata->local;
1000 ifmgd->direct_probe_tries++;
1001 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
1002 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
1003 sdata->dev->name, ifmgd->bssid);
1004 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1005 ieee80211_recalc_idle(local);
1006 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
1009 * Most likely AP is not in the range so remove the
1010 * bss information associated to the AP
1012 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1013 sdata->local->hw.conf.channel->center_freq,
1014 ifmgd->ssid, ifmgd->ssid_len);
1017 * We might have a pending scan which had no chance to run yet
1018 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
1019 * Hence, queue the STAs work again
1021 queue_work(local->hw.workqueue, &ifmgd->work);
1025 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
1026 sdata->dev->name, ifmgd->bssid,
1027 ifmgd->direct_probe_tries);
1029 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1031 /* Direct probe is sent to broadcast address as some APs
1032 * will not answer to direct packet in unassociated state.
1034 ieee80211_send_probe_req(sdata, NULL,
1035 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
1037 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
1041 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
1043 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1044 struct ieee80211_local *local = sdata->local;
1048 ifmgd->auth_tries++;
1049 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
1050 printk(KERN_DEBUG "%s: authentication with AP %pM"
1052 sdata->dev->name, ifmgd->bssid);
1053 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1054 ieee80211_recalc_idle(local);
1055 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
1056 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1057 sdata->local->hw.conf.channel->center_freq,
1058 ifmgd->ssid, ifmgd->ssid_len);
1061 * We might have a pending scan which had no chance to run yet
1062 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
1063 * Hence, queue the STAs work again
1065 queue_work(local->hw.workqueue, &ifmgd->work);
1069 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1070 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
1071 sdata->dev->name, ifmgd->bssid);
1073 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1074 ies = ifmgd->sme_auth_ie;
1075 ies_len = ifmgd->sme_auth_ie_len;
1080 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
1082 ifmgd->auth_transaction = 2;
1084 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
1088 * The disassoc 'reason' argument can be either our own reason
1089 * if self disconnected or a reason code from the AP.
1091 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1092 bool deauth, bool self_disconnected,
1095 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1096 struct ieee80211_local *local = sdata->local;
1097 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
1098 struct ieee80211_bss *bss;
1099 struct sta_info *sta;
1100 u32 changed = 0, config_changed = 0;
1104 sta = sta_info_get(local, ifmgd->bssid);
1111 ifmgd->direct_probe_tries = 0;
1112 ifmgd->auth_tries = 0;
1114 ifmgd->assoc_scan_tries = 0;
1115 ifmgd->assoc_tries = 0;
1117 netif_tx_stop_all_queues(sdata->dev);
1118 netif_carrier_off(sdata->dev);
1120 ieee80211_sta_tear_down_BA_sessions(sta);
1122 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1123 conf->channel->center_freq,
1124 ifmgd->ssid, ifmgd->ssid_len);
1127 cfg80211_unhold_bss(&bss->cbss);
1128 ieee80211_rx_bss_put(local, bss);
1131 if (self_disconnected) {
1133 ieee80211_send_deauth_disassoc(sdata,
1134 IEEE80211_STYPE_DEAUTH, reason);
1136 ieee80211_send_deauth_disassoc(sdata,
1137 IEEE80211_STYPE_DISASSOC, reason);
1140 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1141 changed |= ieee80211_reset_erp_info(sdata);
1143 ieee80211_led_assoc(local, 0);
1144 changed |= BSS_CHANGED_ASSOC;
1145 sdata->vif.bss_conf.assoc = false;
1147 ieee80211_sta_send_apinfo(sdata);
1149 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1150 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1151 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1152 sdata->local->hw.conf.channel->center_freq,
1153 ifmgd->ssid, ifmgd->ssid_len);
1158 ieee80211_set_wmm_default(sdata);
1160 ieee80211_recalc_idle(local);
1162 /* channel(_type) changes are handled by ieee80211_hw_config */
1163 local->oper_channel_type = NL80211_CHAN_NO_HT;
1165 /* on the next assoc, re-program HT parameters */
1166 sdata->ht_opmode_valid = false;
1168 local->power_constr_level = 0;
1170 del_timer_sync(&local->dynamic_ps_timer);
1171 cancel_work_sync(&local->dynamic_ps_enable_work);
1173 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1174 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1175 config_changed |= IEEE80211_CONF_CHANGE_PS;
1178 ieee80211_hw_config(local, config_changed);
1179 ieee80211_bss_info_change_notify(sdata, changed);
1183 sta = sta_info_get(local, ifmgd->bssid);
1189 sta_info_unlink(&sta);
1193 sta_info_destroy(sta);
1196 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1198 if (!sdata || !sdata->default_key ||
1199 sdata->default_key->conf.alg != ALG_WEP)
1204 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1206 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1207 struct ieee80211_local *local = sdata->local;
1208 struct ieee80211_bss *bss;
1211 int privacy_invoked;
1213 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1216 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1217 local->hw.conf.channel->center_freq,
1218 ifmgd->ssid, ifmgd->ssid_len);
1222 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1223 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1224 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1226 ieee80211_rx_bss_put(local, bss);
1228 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1234 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1236 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1237 struct ieee80211_local *local = sdata->local;
1239 ifmgd->assoc_tries++;
1240 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1241 printk(KERN_DEBUG "%s: association with AP %pM"
1243 sdata->dev->name, ifmgd->bssid);
1244 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1245 ieee80211_recalc_idle(local);
1246 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
1247 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1248 sdata->local->hw.conf.channel->center_freq,
1249 ifmgd->ssid, ifmgd->ssid_len);
1251 * We might have a pending scan which had no chance to run yet
1252 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1253 * Hence, queue the STAs work again
1255 queue_work(local->hw.workqueue, &ifmgd->work);
1259 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1260 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1261 sdata->dev->name, ifmgd->bssid);
1262 if (ieee80211_privacy_mismatch(sdata)) {
1263 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1264 "mixed-cell disabled - abort association\n", sdata->dev->name);
1265 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1266 ieee80211_recalc_idle(local);
1270 ieee80211_send_assoc(sdata);
1272 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1275 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1276 struct ieee80211_hdr *hdr)
1279 * We can postpone the mgd.timer whenever receiving unicast frames
1280 * from AP because we know that the connection is working both ways
1281 * at that time. But multicast frames (and hence also beacons) must
1282 * be ignored here, because we need to trigger the timer during
1283 * data idle periods for sending the periodical probe request to
1286 if (!is_multicast_ether_addr(hdr->addr1))
1287 mod_timer(&sdata->u.mgd.timer,
1288 jiffies + IEEE80211_MONITORING_INTERVAL);
1291 void ieee80211_beacon_loss_work(struct work_struct *work)
1293 struct ieee80211_sub_if_data *sdata =
1294 container_of(work, struct ieee80211_sub_if_data,
1295 u.mgd.beacon_loss_work);
1296 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1299 * The driver has already reported this event and we have
1300 * already sent a probe request. Maybe the AP died and the
1301 * driver keeps reporting until we disassociate... We have
1302 * to ignore that because otherwise we would continually
1303 * reset the timer and never check whether we received a
1306 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1309 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1310 if (net_ratelimit()) {
1311 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1312 "- sending probe request\n", sdata->dev->name,
1313 sdata->u.mgd.bssid);
1317 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1318 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1319 ifmgd->ssid_len, NULL, 0);
1321 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1324 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1326 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1328 queue_work(sdata->local->hw.workqueue,
1329 &sdata->u.mgd.beacon_loss_work);
1331 EXPORT_SYMBOL(ieee80211_beacon_loss);
1333 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1335 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1336 struct ieee80211_local *local = sdata->local;
1337 struct sta_info *sta;
1338 bool disassoc = false;
1340 /* TODO: start monitoring current AP signal quality and number of
1341 * missed beacons. Scan other channels every now and then and search
1342 * for better APs. */
1343 /* TODO: remove expired BSSes */
1345 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1349 sta = sta_info_get(local, ifmgd->bssid);
1351 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1352 sdata->dev->name, ifmgd->bssid);
1357 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1358 time_after(jiffies, sta->last_rx + IEEE80211_PROBE_WAIT)) {
1359 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1360 "- disassociating\n",
1361 sdata->dev->name, ifmgd->bssid);
1363 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1368 * Beacon filtering is only enabled with power save and then the
1369 * stack should not check for beacon loss.
1371 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1372 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1374 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1375 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1376 if (net_ratelimit()) {
1377 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1378 "- sending probe request\n",
1379 sdata->dev->name, ifmgd->bssid);
1382 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1383 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1384 ifmgd->ssid_len, NULL, 0);
1389 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1390 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1391 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1392 ifmgd->ssid_len, NULL, 0);
1399 ieee80211_set_disassoc(sdata, true, true,
1400 WLAN_REASON_PREV_AUTH_NOT_VALID);
1402 mod_timer(&ifmgd->timer, jiffies +
1403 IEEE80211_MONITORING_INTERVAL);
1407 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1409 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1411 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1412 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1413 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1414 /* Wait for SME to request association */
1415 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1416 ieee80211_recalc_idle(sdata->local);
1418 ieee80211_associate(sdata);
1422 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1423 struct ieee80211_mgmt *mgmt,
1427 struct ieee802_11_elems elems;
1429 pos = mgmt->u.auth.variable;
1430 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1431 if (!elems.challenge)
1433 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1434 elems.challenge - 2, elems.challenge_len + 2,
1435 sdata->u.mgd.bssid, 1);
1436 sdata->u.mgd.auth_transaction = 4;
1439 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1440 struct ieee80211_mgmt *mgmt,
1443 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1444 u16 auth_alg, auth_transaction, status_code;
1446 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1452 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1455 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1458 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1459 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1460 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1462 if (auth_alg != ifmgd->auth_alg ||
1463 auth_transaction != ifmgd->auth_transaction)
1466 if (status_code != WLAN_STATUS_SUCCESS) {
1467 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1469 const int num_algs = ARRAY_SIZE(algs);
1471 algs[0] = algs[1] = algs[2] = 0xff;
1472 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1473 algs[0] = WLAN_AUTH_OPEN;
1474 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1475 algs[1] = WLAN_AUTH_SHARED_KEY;
1476 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1477 algs[2] = WLAN_AUTH_LEAP;
1478 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1480 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1484 for (i = 0; i < num_algs; i++) {
1486 if (pos >= num_algs)
1488 if (algs[pos] == ifmgd->auth_alg ||
1491 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1492 !ieee80211_sta_wep_configured(sdata))
1494 ifmgd->auth_alg = algs[pos];
1501 switch (ifmgd->auth_alg) {
1502 case WLAN_AUTH_OPEN:
1503 case WLAN_AUTH_LEAP:
1505 ieee80211_auth_completed(sdata);
1506 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1508 case WLAN_AUTH_SHARED_KEY:
1509 if (ifmgd->auth_transaction == 4) {
1510 ieee80211_auth_completed(sdata);
1511 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1513 ieee80211_auth_challenge(sdata, mgmt, len);
1519 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1520 struct ieee80211_mgmt *mgmt,
1523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1529 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1532 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1534 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1535 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1536 sdata->dev->name, reason_code);
1538 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1539 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1540 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1541 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1542 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1543 mod_timer(&ifmgd->timer, jiffies +
1544 IEEE80211_RETRY_AUTH_INTERVAL);
1547 ieee80211_set_disassoc(sdata, true, false, 0);
1548 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1549 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
1553 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1554 struct ieee80211_mgmt *mgmt,
1557 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1563 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1566 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1568 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1569 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1570 sdata->dev->name, reason_code);
1572 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1573 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1574 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1575 mod_timer(&ifmgd->timer, jiffies +
1576 IEEE80211_RETRY_AUTH_INTERVAL);
1579 ieee80211_set_disassoc(sdata, false, false, reason_code);
1580 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
1584 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1585 struct ieee80211_mgmt *mgmt,
1589 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1590 struct ieee80211_local *local = sdata->local;
1591 struct ieee80211_supported_band *sband;
1592 struct sta_info *sta;
1593 u32 rates, basic_rates;
1594 u16 capab_info, status_code, aid;
1595 struct ieee802_11_elems elems;
1596 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1600 bool have_higher_than_11mbit = false, newsta = false;
1601 u16 ap_ht_cap_flags;
1603 /* AssocResp and ReassocResp have identical structure, so process both
1604 * of them in this function. */
1606 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1612 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1615 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1616 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1617 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1619 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1620 "status=%d aid=%d)\n",
1621 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1622 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1624 pos = mgmt->u.assoc_resp.variable;
1625 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1627 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1628 elems.timeout_int && elems.timeout_int_len == 5 &&
1629 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1631 tu = get_unaligned_le32(elems.timeout_int + 1);
1632 ms = tu * 1024 / 1000;
1633 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1634 "comeback duration %u TU (%u ms)\n",
1635 sdata->dev->name, tu, ms);
1636 if (ms > IEEE80211_ASSOC_TIMEOUT)
1637 mod_timer(&ifmgd->timer,
1638 jiffies + msecs_to_jiffies(ms));
1642 if (status_code != WLAN_STATUS_SUCCESS) {
1643 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1644 sdata->dev->name, status_code);
1645 /* if this was a reassociation, ensure we try a "full"
1646 * association next time. This works around some broken APs
1647 * which do not correctly reject reassociation requests. */
1648 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1649 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1650 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1651 /* Wait for SME to decide what to do next */
1652 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1653 ieee80211_recalc_idle(local);
1658 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1659 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1660 "set\n", sdata->dev->name, aid);
1661 aid &= ~(BIT(15) | BIT(14));
1663 if (!elems.supp_rates) {
1664 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1669 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1671 ifmgd->ap_capab = capab_info;
1673 kfree(ifmgd->assocresp_ies);
1674 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1675 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1676 if (ifmgd->assocresp_ies)
1677 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1681 /* Add STA entry for the AP */
1682 sta = sta_info_get(local, ifmgd->bssid);
1686 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1688 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1689 " the AP\n", sdata->dev->name);
1694 /* update new sta with its last rx activity */
1695 sta->last_rx = jiffies;
1699 * FIXME: Do we really need to update the sta_info's information here?
1700 * We already know about the AP (we found it in our list) so it
1701 * should already be filled with the right info, no?
1702 * As is stands, all this is racy because typically we assume
1703 * the information that is filled in here (except flags) doesn't
1704 * change while a STA structure is alive. As such, it should move
1705 * to between the sta_info_alloc() and sta_info_insert() above.
1708 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP);
1709 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1710 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1714 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1716 for (i = 0; i < elems.supp_rates_len; i++) {
1717 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1718 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1721 have_higher_than_11mbit = true;
1723 for (j = 0; j < sband->n_bitrates; j++) {
1724 if (sband->bitrates[j].bitrate == rate) {
1727 basic_rates |= BIT(j);
1733 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1734 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1735 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1738 have_higher_than_11mbit = true;
1740 for (j = 0; j < sband->n_bitrates; j++) {
1741 if (sband->bitrates[j].bitrate == rate) {
1744 basic_rates |= BIT(j);
1750 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1751 sdata->vif.bss_conf.basic_rates = basic_rates;
1753 /* cf. IEEE 802.11 9.2.12 */
1754 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1755 have_higher_than_11mbit)
1756 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1758 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1760 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1761 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1762 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1763 elems.ht_cap_elem, &sta->sta.ht_cap);
1765 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1767 rate_control_rate_init(sta);
1769 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1770 set_sta_flags(sta, WLAN_STA_MFP);
1772 if (elems.wmm_param)
1773 set_sta_flags(sta, WLAN_STA_WME);
1776 int err = sta_info_insert(sta);
1778 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1779 " the AP (error %d)\n", sdata->dev->name, err);
1787 if (elems.wmm_param)
1788 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1789 elems.wmm_param_len);
1791 ieee80211_set_wmm_default(sdata);
1793 if (elems.ht_info_elem && elems.wmm_param &&
1794 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1795 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1796 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1799 /* set AID and assoc capability,
1800 * ieee80211_set_associated() will tell the driver */
1801 bss_conf->aid = aid;
1802 bss_conf->assoc_capability = capab_info;
1803 ieee80211_set_associated(sdata, changed);
1806 * initialise the time of last beacon to be the association time,
1807 * otherwise beacon loss check will trigger immediately
1809 ifmgd->last_beacon = jiffies;
1811 ieee80211_associated(sdata);
1812 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1816 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1817 struct ieee80211_mgmt *mgmt,
1819 struct ieee80211_rx_status *rx_status,
1820 struct ieee802_11_elems *elems,
1823 struct ieee80211_local *local = sdata->local;
1825 struct ieee80211_bss *bss;
1826 struct ieee80211_channel *channel;
1828 if (elems->ds_params && elems->ds_params_len == 1)
1829 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1831 freq = rx_status->freq;
1833 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1835 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1838 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1843 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1844 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1845 struct ieee80211_channel_sw_ie *sw_elem =
1846 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1847 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1850 ieee80211_rx_bss_put(local, bss);
1854 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1855 struct ieee80211_mgmt *mgmt,
1857 struct ieee80211_rx_status *rx_status)
1859 struct ieee80211_if_managed *ifmgd;
1861 struct ieee802_11_elems elems;
1863 ifmgd = &sdata->u.mgd;
1865 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1866 return; /* ignore ProbeResp to foreign address */
1868 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1872 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1875 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1877 /* direct probe may be part of the association flow */
1878 if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
1879 printk(KERN_DEBUG "%s direct probe responded\n",
1881 ieee80211_authenticate(sdata);
1884 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1885 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1889 * This is the canonical list of information elements we care about,
1890 * the filter code also gives us all changes to the Microsoft OUI
1891 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1893 * We implement beacon filtering in software since that means we can
1894 * avoid processing the frame here and in cfg80211, and userspace
1895 * will not be able to tell whether the hardware supports it or not.
1897 * XXX: This list needs to be dynamic -- userspace needs to be able to
1898 * add items it requires. It also needs to be able to tell us to
1899 * look out for other vendor IEs.
1901 static const u64 care_about_ies =
1902 (1ULL << WLAN_EID_COUNTRY) |
1903 (1ULL << WLAN_EID_ERP_INFO) |
1904 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1905 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1906 (1ULL << WLAN_EID_HT_CAPABILITY) |
1907 (1ULL << WLAN_EID_HT_INFORMATION);
1909 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1910 struct ieee80211_mgmt *mgmt,
1912 struct ieee80211_rx_status *rx_status)
1914 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1916 struct ieee802_11_elems elems;
1917 struct ieee80211_local *local = sdata->local;
1919 bool erp_valid, directed_tim = false;
1923 /* Process beacon from the current BSS */
1924 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1928 if (rx_status->freq != local->hw.conf.channel->center_freq)
1931 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1932 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1935 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1936 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1937 if (net_ratelimit()) {
1938 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1939 "to a received beacon\n", sdata->dev->name);
1942 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1945 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1946 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1947 len - baselen, &elems,
1948 care_about_ies, ncrc);
1950 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1951 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1954 if (ncrc != ifmgd->beacon_crc) {
1955 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1958 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1959 elems.wmm_param_len);
1962 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1964 if (local->hw.conf.dynamic_ps_timeout > 0) {
1965 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1966 ieee80211_hw_config(local,
1967 IEEE80211_CONF_CHANGE_PS);
1968 ieee80211_send_nullfunc(local, sdata, 0);
1970 local->pspolling = true;
1973 * Here is assumed that the driver will be
1974 * able to send ps-poll frame and receive a
1975 * response even though power save mode is
1976 * enabled, but some drivers might require
1977 * to disable power save here. This needs
1978 * to be investigated.
1980 ieee80211_send_pspoll(local, sdata);
1985 if (ncrc == ifmgd->beacon_crc)
1987 ifmgd->beacon_crc = ncrc;
1989 if (elems.erp_info && elems.erp_info_len >= 1) {
1991 erp_value = elems.erp_info[0];
1995 changed |= ieee80211_handle_bss_capability(sdata,
1996 le16_to_cpu(mgmt->u.beacon.capab_info),
1997 erp_valid, erp_value);
2000 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2001 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
2002 struct sta_info *sta;
2003 struct ieee80211_supported_band *sband;
2004 u16 ap_ht_cap_flags;
2008 sta = sta_info_get(local, ifmgd->bssid);
2014 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2016 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
2017 elems.ht_cap_elem, &sta->sta.ht_cap);
2019 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2023 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
2027 if (elems.country_elem) {
2028 /* Note we are only reviewing this on beacons
2029 * for the BSSID we are associated to */
2030 regulatory_hint_11d(local->hw.wiphy,
2031 elems.country_elem, elems.country_elem_len);
2033 /* TODO: IBSS also needs this */
2034 if (elems.pwr_constr_elem)
2035 ieee80211_handle_pwr_constr(sdata,
2036 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2037 elems.pwr_constr_elem,
2038 elems.pwr_constr_elem_len);
2041 ieee80211_bss_info_change_notify(sdata, changed);
2044 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
2045 struct sk_buff *skb,
2046 struct ieee80211_rx_status *rx_status)
2048 struct ieee80211_local *local = sdata->local;
2049 struct ieee80211_mgmt *mgmt;
2053 return RX_DROP_MONITOR;
2055 mgmt = (struct ieee80211_mgmt *) skb->data;
2056 fc = le16_to_cpu(mgmt->frame_control);
2058 switch (fc & IEEE80211_FCTL_STYPE) {
2059 case IEEE80211_STYPE_PROBE_REQ:
2060 case IEEE80211_STYPE_PROBE_RESP:
2061 case IEEE80211_STYPE_BEACON:
2062 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2063 case IEEE80211_STYPE_AUTH:
2064 case IEEE80211_STYPE_ASSOC_RESP:
2065 case IEEE80211_STYPE_REASSOC_RESP:
2066 case IEEE80211_STYPE_DEAUTH:
2067 case IEEE80211_STYPE_DISASSOC:
2068 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
2069 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
2073 return RX_DROP_MONITOR;
2076 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2077 struct sk_buff *skb)
2079 struct ieee80211_rx_status *rx_status;
2080 struct ieee80211_mgmt *mgmt;
2083 rx_status = (struct ieee80211_rx_status *) skb->cb;
2084 mgmt = (struct ieee80211_mgmt *) skb->data;
2085 fc = le16_to_cpu(mgmt->frame_control);
2087 switch (fc & IEEE80211_FCTL_STYPE) {
2088 case IEEE80211_STYPE_PROBE_RESP:
2089 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
2092 case IEEE80211_STYPE_BEACON:
2093 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2096 case IEEE80211_STYPE_AUTH:
2097 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2099 case IEEE80211_STYPE_ASSOC_RESP:
2100 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
2102 case IEEE80211_STYPE_REASSOC_RESP:
2103 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
2105 case IEEE80211_STYPE_DEAUTH:
2106 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2108 case IEEE80211_STYPE_DISASSOC:
2109 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2116 static void ieee80211_sta_timer(unsigned long data)
2118 struct ieee80211_sub_if_data *sdata =
2119 (struct ieee80211_sub_if_data *) data;
2120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2121 struct ieee80211_local *local = sdata->local;
2123 if (local->quiescing) {
2124 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2128 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2129 queue_work(local->hw.workqueue, &ifmgd->work);
2132 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
2134 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2135 struct ieee80211_local *local = sdata->local;
2137 /* Reset own TSF to allow time synchronization work. */
2138 drv_reset_tsf(local);
2140 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
2143 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2144 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2145 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2146 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
2147 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2148 ifmgd->auth_alg = WLAN_AUTH_LEAP;
2149 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
2150 ifmgd->auth_alg = WLAN_AUTH_FT;
2152 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2153 ifmgd->auth_transaction = -1;
2154 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2155 ifmgd->assoc_scan_tries = 0;
2156 ifmgd->direct_probe_tries = 0;
2157 ifmgd->auth_tries = 0;
2158 ifmgd->assoc_tries = 0;
2159 netif_tx_stop_all_queues(sdata->dev);
2160 netif_carrier_off(sdata->dev);
2163 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2166 struct ieee80211_local *local = sdata->local;
2167 struct ieee80211_bss *bss;
2168 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2169 u8 ssid_len = ifmgd->ssid_len;
2170 u16 capa_mask = WLAN_CAPABILITY_ESS;
2171 u16 capa_val = WLAN_CAPABILITY_ESS;
2172 struct ieee80211_channel *chan = local->oper_channel;
2174 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2175 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2176 IEEE80211_STA_AUTO_BSSID_SEL |
2177 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2178 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2179 if (sdata->default_key)
2180 capa_val |= WLAN_CAPABILITY_PRIVACY;
2183 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2186 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2189 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2194 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2195 bssid, ssid, ssid_len,
2196 capa_mask, capa_val);
2199 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
2200 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2201 ieee80211_sta_set_ssid(sdata, bss->ssid,
2203 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2204 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2206 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2207 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2209 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2211 /* Send out direct probe if no probe resp was received or
2212 * the one we have is outdated
2214 if (!bss->last_probe_resp ||
2215 time_after(jiffies, bss->last_probe_resp
2216 + IEEE80211_SCAN_RESULT_EXPIRE))
2217 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2219 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2221 ieee80211_rx_bss_put(local, bss);
2222 ieee80211_sta_reset_auth(sdata);
2225 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2227 ifmgd->assoc_scan_tries++;
2229 ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2232 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2233 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2235 ifmgd->assoc_scan_tries = 0;
2236 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2237 ieee80211_recalc_idle(local);
2244 static void ieee80211_sta_work(struct work_struct *work)
2246 struct ieee80211_sub_if_data *sdata =
2247 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2248 struct ieee80211_local *local = sdata->local;
2249 struct ieee80211_if_managed *ifmgd;
2250 struct sk_buff *skb;
2252 if (!netif_running(sdata->dev))
2255 if (local->sw_scanning || local->hw_scanning)
2258 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2262 * Nothing should have been stuffed into the workqueue during
2263 * the suspend->resume cycle. If this WARN is seen then there
2264 * is a bug with either the driver suspend or something in
2265 * mac80211 stuffing into the workqueue which we haven't yet
2266 * cleared during mac80211's suspend cycle.
2268 if (WARN_ON(local->suspended))
2271 ifmgd = &sdata->u.mgd;
2273 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2274 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2276 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2277 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2278 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2279 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2280 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2281 round_jiffies_relative(0));
2285 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2286 if (ieee80211_sta_config_auth(sdata))
2288 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2289 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2292 ieee80211_recalc_idle(local);
2294 switch (ifmgd->state) {
2295 case IEEE80211_STA_MLME_DISABLED:
2297 case IEEE80211_STA_MLME_DIRECT_PROBE:
2298 ieee80211_direct_probe(sdata);
2300 case IEEE80211_STA_MLME_AUTHENTICATE:
2301 ieee80211_authenticate(sdata);
2303 case IEEE80211_STA_MLME_ASSOCIATE:
2304 ieee80211_associate(sdata);
2306 case IEEE80211_STA_MLME_ASSOCIATED:
2307 ieee80211_associated(sdata);
2314 if (ieee80211_privacy_mismatch(sdata)) {
2315 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2316 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2318 ieee80211_set_disassoc(sdata, false, true,
2319 WLAN_REASON_UNSPECIFIED);
2323 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2325 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2327 * Need to update last_beacon to avoid beacon loss
2330 sdata->u.mgd.last_beacon = jiffies;
2333 queue_work(sdata->local->hw.workqueue,
2334 &sdata->u.mgd.work);
2339 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2344 * we need to use atomic bitops for the running bits
2345 * only because both timers might fire at the same
2346 * time -- the code here is properly synchronised.
2349 cancel_work_sync(&ifmgd->work);
2350 cancel_work_sync(&ifmgd->beacon_loss_work);
2351 if (del_timer_sync(&ifmgd->timer))
2352 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2354 cancel_work_sync(&ifmgd->chswitch_work);
2355 if (del_timer_sync(&ifmgd->chswitch_timer))
2356 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2359 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2361 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2363 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2364 add_timer(&ifmgd->timer);
2365 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2366 add_timer(&ifmgd->chswitch_timer);
2370 /* interface setup */
2371 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2373 struct ieee80211_if_managed *ifmgd;
2376 ifmgd = &sdata->u.mgd;
2377 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2378 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2379 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2380 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2381 (unsigned long) sdata);
2382 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2383 (unsigned long) sdata);
2384 skb_queue_head_init(&ifmgd->skb_queue);
2386 ifmgd->capab = WLAN_CAPABILITY_ESS;
2387 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2388 IEEE80211_AUTH_ALG_SHARED_KEY;
2389 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
2390 IEEE80211_STA_AUTO_BSSID_SEL |
2391 IEEE80211_STA_AUTO_CHANNEL_SEL;
2392 if (sdata->local->hw.queues >= 4)
2393 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2395 hw_flags = sdata->local->hw.flags;
2397 if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2398 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2399 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2403 /* configuration hooks */
2404 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2406 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2407 struct ieee80211_local *local = sdata->local;
2409 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2412 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
2413 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2414 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
2415 IEEE80211_STA_AUTO_SSID_SEL))) {
2417 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2418 ieee80211_set_disassoc(sdata, true, true,
2419 WLAN_REASON_DEAUTH_LEAVING);
2421 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2422 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2423 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2424 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2425 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2426 queue_work(local->hw.workqueue, &ifmgd->work);
2430 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2432 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2434 if (ifmgd->ssid_len)
2435 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2437 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2442 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2444 struct ieee80211_if_managed *ifmgd;
2446 if (len > IEEE80211_MAX_SSID_LEN)
2449 ifmgd = &sdata->u.mgd;
2451 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2453 * Do not use reassociation if SSID is changed (different ESS).
2455 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2456 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2457 memcpy(ifmgd->ssid, ssid, len);
2458 ifmgd->ssid_len = len;
2461 return ieee80211_sta_commit(sdata);
2464 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2466 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2467 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2468 *len = ifmgd->ssid_len;
2472 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2474 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2476 if (is_valid_ether_addr(bssid)) {
2477 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2478 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2480 memset(ifmgd->bssid, 0, ETH_ALEN);
2481 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2484 if (netif_running(sdata->dev))
2485 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2487 return ieee80211_sta_commit(sdata);
2490 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2491 const char *ie, size_t len)
2493 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2495 kfree(ifmgd->extra_ie);
2497 ifmgd->extra_ie = NULL;
2498 ifmgd->extra_ie_len = 0;
2501 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2502 if (!ifmgd->extra_ie) {
2503 ifmgd->extra_ie_len = 0;
2506 memcpy(ifmgd->extra_ie, ie, len);
2507 ifmgd->extra_ie_len = len;
2511 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2513 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2514 sdata->dev->name, reason);
2516 ieee80211_set_disassoc(sdata, true, true, reason);
2520 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2522 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2524 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2525 sdata->dev->name, reason);
2527 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2530 ieee80211_set_disassoc(sdata, false, true, reason);
2534 /* scan finished notification */
2535 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2537 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2539 /* Restart STA timers */
2541 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2542 ieee80211_restart_sta_timer(sdata);
2546 int ieee80211_max_network_latency(struct notifier_block *nb,
2547 unsigned long data, void *dummy)
2549 s32 latency_usec = (s32) data;
2550 struct ieee80211_local *local =
2551 container_of(nb, struct ieee80211_local,
2552 network_latency_notifier);
2554 mutex_lock(&local->iflist_mtx);
2555 ieee80211_recalc_ps(local, latency_usec);
2556 mutex_unlock(&local->iflist_mtx);