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_AUTH_TIMEOUT (HZ / 5)
31 #define IEEE80211_AUTH_MAX_TRIES 3
32 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
33 #define IEEE80211_ASSOC_MAX_TRIES 3
34 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
35 #define IEEE80211_PROBE_WAIT (HZ / 5)
37 #define TMR_RUNNING_TIMER 0
38 #define TMR_RUNNING_CHANSW 1
41 * All cfg80211 functions have to be called outside a locked
42 * section so that they can acquire a lock themselves... This
43 * is much simpler than queuing up things in cfg80211, but we
44 * do need some indirection for that here.
47 /* no action required */
50 /* caller must call cfg80211_send_rx_auth() */
51 RX_MGMT_CFG80211_AUTH,
53 /* caller must call cfg80211_send_rx_assoc() */
54 RX_MGMT_CFG80211_ASSOC,
56 /* caller must call cfg80211_send_deauth() */
57 RX_MGMT_CFG80211_DEAUTH,
59 /* caller must call cfg80211_send_disassoc() */
60 RX_MGMT_CFG80211_DISASSOC,
62 /* caller must call cfg80211_auth_timeout() & free work */
63 RX_MGMT_CFG80211_AUTH_TO,
65 /* caller must call cfg80211_assoc_timeout() & free work */
66 RX_MGMT_CFG80211_ASSOC_TO,
70 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
72 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
75 static int ecw2cw(int ecw)
77 return (1 << ecw) - 1;
80 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
81 struct ieee80211_supported_band *sband,
87 for (i = 0; i < bss->supp_rates_len; i++) {
88 int rate = (bss->supp_rates[i] & 0x7F) * 5;
90 for (j = 0; j < sband->n_bitrates; j++)
91 if (sband->bitrates[j].bitrate == rate) {
102 * ieee80211_enable_ht should be called only after the operating band
103 * has been determined as ht configuration depends on the hw's
104 * HT abilities for a specific band.
106 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
107 struct ieee80211_ht_info *hti,
108 const u8 *bssid, u16 ap_ht_cap_flags)
110 struct ieee80211_local *local = sdata->local;
111 struct ieee80211_supported_band *sband;
112 struct sta_info *sta;
115 bool enable_ht = true, ht_changed;
116 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
118 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
120 /* HT is not supported */
121 if (!sband->ht_cap.ht_supported)
124 /* check that channel matches the right operating channel */
125 if (local->hw.conf.channel->center_freq !=
126 ieee80211_channel_to_frequency(hti->control_chan))
130 channel_type = NL80211_CHAN_HT20;
132 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
133 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
134 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
135 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
136 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
137 if (!(local->hw.conf.channel->flags &
138 IEEE80211_CHAN_NO_HT40PLUS))
139 channel_type = NL80211_CHAN_HT40PLUS;
141 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
142 if (!(local->hw.conf.channel->flags &
143 IEEE80211_CHAN_NO_HT40MINUS))
144 channel_type = NL80211_CHAN_HT40MINUS;
150 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
151 channel_type != local->hw.conf.channel_type;
153 local->oper_channel_type = channel_type;
156 /* channel_type change automatically detected */
157 ieee80211_hw_config(local, 0);
160 sta = sta_info_get(local, bssid);
162 rate_control_rate_update(local, sband, sta,
163 IEEE80211_RC_HT_CHANGED);
171 ht_opmode = le16_to_cpu(hti->operation_mode);
173 /* if bss configuration changed store the new one */
174 if (!sdata->ht_opmode_valid ||
175 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
176 changed |= BSS_CHANGED_HT;
177 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
178 sdata->ht_opmode_valid = true;
184 /* frame sending functions */
186 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
187 struct ieee80211_mgd_work *wk)
189 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
190 struct ieee80211_local *local = sdata->local;
192 struct ieee80211_mgmt *mgmt;
194 const u8 *ies, *ht_ie;
195 int i, len, count, rates_len, supp_rates_len;
198 struct ieee80211_supported_band *sband;
201 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
202 sizeof(*mgmt) + 200 + wk->ie_len +
205 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
206 "frame\n", sdata->dev->name);
209 skb_reserve(skb, local->hw.extra_tx_headroom);
211 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
213 capab = ifmgd->capab;
215 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
216 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
217 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
218 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
219 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
222 if (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
223 capab |= WLAN_CAPABILITY_PRIVACY;
224 if (wk->bss->wmm_used)
227 /* get all rates supported by the device and the AP as
228 * some APs don't like getting a superset of their rates
229 * in the association request (e.g. D-Link DAP 1353 in
231 rates_len = ieee80211_compatible_rates(wk->bss, sband, &rates);
233 if ((wk->bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
234 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
235 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
237 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
239 memcpy(mgmt->da, wk->bss->cbss.bssid, ETH_ALEN);
240 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
241 memcpy(mgmt->bssid, wk->bss->cbss.bssid, ETH_ALEN);
243 if (!is_zero_ether_addr(wk->prev_bssid)) {
245 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
246 IEEE80211_STYPE_REASSOC_REQ);
247 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
248 mgmt->u.reassoc_req.listen_interval =
249 cpu_to_le16(local->hw.conf.listen_interval);
250 memcpy(mgmt->u.reassoc_req.current_ap, wk->prev_bssid,
254 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
255 IEEE80211_STYPE_ASSOC_REQ);
256 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
257 mgmt->u.assoc_req.listen_interval =
258 cpu_to_le16(local->hw.conf.listen_interval);
262 ies = pos = skb_put(skb, 2 + wk->ssid_len);
263 *pos++ = WLAN_EID_SSID;
264 *pos++ = wk->ssid_len;
265 memcpy(pos, wk->ssid, wk->ssid_len);
267 /* add all rates which were marked to be used above */
268 supp_rates_len = rates_len;
269 if (supp_rates_len > 8)
272 len = sband->n_bitrates;
273 pos = skb_put(skb, supp_rates_len + 2);
274 *pos++ = WLAN_EID_SUPP_RATES;
275 *pos++ = supp_rates_len;
278 for (i = 0; i < sband->n_bitrates; i++) {
279 if (BIT(i) & rates) {
280 int rate = sband->bitrates[i].bitrate;
281 *pos++ = (u8) (rate / 5);
287 if (rates_len > count) {
288 pos = skb_put(skb, rates_len - count + 2);
289 *pos++ = WLAN_EID_EXT_SUPP_RATES;
290 *pos++ = rates_len - count;
292 for (i++; i < sband->n_bitrates; i++) {
293 if (BIT(i) & rates) {
294 int rate = sband->bitrates[i].bitrate;
295 *pos++ = (u8) (rate / 5);
300 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
301 /* 1. power capabilities */
302 pos = skb_put(skb, 4);
303 *pos++ = WLAN_EID_PWR_CAPABILITY;
305 *pos++ = 0; /* min tx power */
306 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
308 /* 2. supported channels */
309 /* TODO: get this in reg domain format */
310 pos = skb_put(skb, 2 * sband->n_channels + 2);
311 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
312 *pos++ = 2 * sband->n_channels;
313 for (i = 0; i < sband->n_channels; i++) {
314 *pos++ = ieee80211_frequency_to_channel(
315 sband->channels[i].center_freq);
316 *pos++ = 1; /* one channel in the subband*/
320 if (wk->ie_len && wk->ie) {
321 pos = skb_put(skb, wk->ie_len);
322 memcpy(pos, wk->ie, wk->ie_len);
325 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
326 pos = skb_put(skb, 9);
327 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
328 *pos++ = 7; /* len */
329 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
332 *pos++ = 2; /* WME */
333 *pos++ = 0; /* WME info */
334 *pos++ = 1; /* WME ver */
338 /* wmm support is a must to HT */
340 * IEEE802.11n does not allow TKIP/WEP as pairwise
341 * ciphers in HT mode. We still associate in non-ht
342 * mode (11a/b/g) if any one of these ciphers is
343 * configured as pairwise.
345 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
346 sband->ht_cap.ht_supported &&
347 (ht_ie = ieee80211_bss_get_ie(&wk->bss->cbss, WLAN_EID_HT_INFORMATION)) &&
348 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
349 (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
350 struct ieee80211_ht_info *ht_info =
351 (struct ieee80211_ht_info *)(ht_ie + 2);
352 u16 cap = sband->ht_cap.cap;
354 u32 flags = local->hw.conf.channel->flags;
356 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
357 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
358 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
359 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
360 cap &= ~IEEE80211_HT_CAP_SGI_40;
363 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
364 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
365 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
366 cap &= ~IEEE80211_HT_CAP_SGI_40;
371 tmp = cpu_to_le16(cap);
372 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
373 *pos++ = WLAN_EID_HT_CAPABILITY;
374 *pos++ = sizeof(struct ieee80211_ht_cap);
375 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
376 memcpy(pos, &tmp, sizeof(u16));
378 /* TODO: needs a define here for << 2 */
379 *pos++ = sband->ht_cap.ampdu_factor |
380 (sband->ht_cap.ampdu_density << 2);
381 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
384 ieee80211_tx_skb(sdata, skb, 0);
388 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
389 const u8 *bssid, u16 stype, u16 reason)
391 struct ieee80211_local *local = sdata->local;
392 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
394 struct ieee80211_mgmt *mgmt;
396 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
398 printk(KERN_DEBUG "%s: failed to allocate buffer for "
399 "deauth/disassoc frame\n", sdata->dev->name);
402 skb_reserve(skb, local->hw.extra_tx_headroom);
404 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
406 memcpy(mgmt->da, bssid, ETH_ALEN);
407 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
408 memcpy(mgmt->bssid, bssid, ETH_ALEN);
409 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
411 /* u.deauth.reason_code == u.disassoc.reason_code */
412 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
414 if (stype == IEEE80211_STYPE_DEAUTH)
415 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len);
417 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len);
418 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
421 void ieee80211_send_pspoll(struct ieee80211_local *local,
422 struct ieee80211_sub_if_data *sdata)
424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
425 struct ieee80211_pspoll *pspoll;
429 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
431 printk(KERN_DEBUG "%s: failed to allocate buffer for "
432 "pspoll frame\n", sdata->dev->name);
435 skb_reserve(skb, local->hw.extra_tx_headroom);
437 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
438 memset(pspoll, 0, sizeof(*pspoll));
439 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
440 pspoll->frame_control = cpu_to_le16(fc);
441 pspoll->aid = cpu_to_le16(ifmgd->aid);
443 /* aid in PS-Poll has its two MSBs each set to 1 */
444 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
446 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
447 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
449 ieee80211_tx_skb(sdata, skb, 0);
452 void ieee80211_send_nullfunc(struct ieee80211_local *local,
453 struct ieee80211_sub_if_data *sdata,
457 struct ieee80211_hdr *nullfunc;
460 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
463 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
465 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
466 "frame\n", sdata->dev->name);
469 skb_reserve(skb, local->hw.extra_tx_headroom);
471 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
472 memset(nullfunc, 0, 24);
473 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
474 IEEE80211_FCTL_TODS);
476 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
477 nullfunc->frame_control = fc;
478 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
479 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
480 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
482 ieee80211_tx_skb(sdata, skb, 0);
485 /* spectrum management related things */
486 static void ieee80211_chswitch_work(struct work_struct *work)
488 struct ieee80211_sub_if_data *sdata =
489 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
490 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
492 if (!netif_running(sdata->dev))
495 mutex_lock(&ifmgd->mtx);
496 if (!ifmgd->associated)
499 sdata->local->oper_channel = sdata->local->csa_channel;
500 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
502 /* XXX: shouldn't really modify cfg80211-owned data! */
503 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
505 ieee80211_wake_queues_by_reason(&sdata->local->hw,
506 IEEE80211_QUEUE_STOP_REASON_CSA);
508 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
509 mutex_unlock(&ifmgd->mtx);
512 static void ieee80211_chswitch_timer(unsigned long data)
514 struct ieee80211_sub_if_data *sdata =
515 (struct ieee80211_sub_if_data *) data;
516 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
518 if (sdata->local->quiescing) {
519 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
523 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
526 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
527 struct ieee80211_channel_sw_ie *sw_elem,
528 struct ieee80211_bss *bss)
530 struct ieee80211_channel *new_ch;
531 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
532 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
534 ASSERT_MGD_MTX(ifmgd);
536 if (!ifmgd->associated)
539 if (sdata->local->sw_scanning || sdata->local->hw_scanning)
542 /* Disregard subsequent beacons if we are already running a timer
545 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
548 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
549 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
552 sdata->local->csa_channel = new_ch;
554 if (sw_elem->count <= 1) {
555 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
557 ieee80211_stop_queues_by_reason(&sdata->local->hw,
558 IEEE80211_QUEUE_STOP_REASON_CSA);
559 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
560 mod_timer(&ifmgd->chswitch_timer,
562 msecs_to_jiffies(sw_elem->count *
563 bss->cbss.beacon_interval));
567 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
568 u16 capab_info, u8 *pwr_constr_elem,
569 u8 pwr_constr_elem_len)
571 struct ieee80211_conf *conf = &sdata->local->hw.conf;
573 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
576 /* Power constraint IE length should be 1 octet */
577 if (pwr_constr_elem_len != 1)
580 if ((*pwr_constr_elem <= conf->channel->max_power) &&
581 (*pwr_constr_elem != sdata->local->power_constr_level)) {
582 sdata->local->power_constr_level = *pwr_constr_elem;
583 ieee80211_hw_config(sdata->local, 0);
588 static void ieee80211_enable_ps(struct ieee80211_local *local,
589 struct ieee80211_sub_if_data *sdata)
591 struct ieee80211_conf *conf = &local->hw.conf;
594 * If we are scanning right now then the parameters will
595 * take effect when scan finishes.
597 if (local->hw_scanning || local->sw_scanning)
600 if (conf->dynamic_ps_timeout > 0 &&
601 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
602 mod_timer(&local->dynamic_ps_timer, jiffies +
603 msecs_to_jiffies(conf->dynamic_ps_timeout));
605 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
606 ieee80211_send_nullfunc(local, sdata, 1);
607 conf->flags |= IEEE80211_CONF_PS;
608 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
612 static void ieee80211_change_ps(struct ieee80211_local *local)
614 struct ieee80211_conf *conf = &local->hw.conf;
616 if (local->ps_sdata) {
617 ieee80211_enable_ps(local, local->ps_sdata);
618 } else if (conf->flags & IEEE80211_CONF_PS) {
619 conf->flags &= ~IEEE80211_CONF_PS;
620 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
621 del_timer_sync(&local->dynamic_ps_timer);
622 cancel_work_sync(&local->dynamic_ps_enable_work);
626 /* need to hold RTNL or interface lock */
627 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
629 struct ieee80211_sub_if_data *sdata, *found = NULL;
632 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
633 local->ps_sdata = NULL;
637 list_for_each_entry(sdata, &local->interfaces, list) {
638 if (!netif_running(sdata->dev))
640 if (sdata->vif.type != NL80211_IFTYPE_STATION)
646 if (count == 1 && found->u.mgd.powersave &&
647 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
648 !(found->u.mgd.flags & IEEE80211_STA_PROBEREQ_POLL)) {
652 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
654 beaconint_us = ieee80211_tu_to_usec(
655 found->vif.bss_conf.beacon_int);
657 if (beaconint_us > latency) {
658 local->ps_sdata = NULL;
660 u8 dtimper = found->vif.bss_conf.dtim_period;
664 maxslp = min_t(int, dtimper,
665 latency / beaconint_us);
667 local->hw.conf.max_sleep_period = maxslp;
668 local->ps_sdata = found;
671 local->ps_sdata = NULL;
674 ieee80211_change_ps(local);
677 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
679 struct ieee80211_local *local =
680 container_of(work, struct ieee80211_local,
681 dynamic_ps_disable_work);
683 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
684 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
685 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
688 ieee80211_wake_queues_by_reason(&local->hw,
689 IEEE80211_QUEUE_STOP_REASON_PS);
692 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
694 struct ieee80211_local *local =
695 container_of(work, struct ieee80211_local,
696 dynamic_ps_enable_work);
697 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
699 /* can only happen when PS was just disabled anyway */
703 if (local->hw.conf.flags & IEEE80211_CONF_PS)
706 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
707 ieee80211_send_nullfunc(local, sdata, 1);
709 local->hw.conf.flags |= IEEE80211_CONF_PS;
710 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
713 void ieee80211_dynamic_ps_timer(unsigned long data)
715 struct ieee80211_local *local = (void *) data;
717 if (local->quiescing)
720 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
724 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
725 struct ieee80211_if_managed *ifmgd,
726 u8 *wmm_param, size_t wmm_param_len)
728 struct ieee80211_tx_queue_params params;
733 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
739 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
741 count = wmm_param[6] & 0x0f;
742 if (count == ifmgd->wmm_last_param_set)
744 ifmgd->wmm_last_param_set = count;
747 left = wmm_param_len - 8;
749 memset(¶ms, 0, sizeof(params));
752 for (; left >= 4; left -= 4, pos += 4) {
753 int aci = (pos[0] >> 5) & 0x03;
754 int acm = (pos[0] >> 4) & 0x01;
761 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
766 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
771 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
777 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
781 params.aifs = pos[0] & 0x0f;
782 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
783 params.cw_min = ecw2cw(pos[1] & 0x0f);
784 params.txop = get_unaligned_le16(pos + 2);
785 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
786 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
787 "cWmin=%d cWmax=%d txop=%d\n",
788 wiphy_name(local->hw.wiphy), queue, aci, acm,
789 params.aifs, params.cw_min, params.cw_max, params.txop);
791 if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx)
792 printk(KERN_DEBUG "%s: failed to set TX queue "
793 "parameters for queue %d\n",
794 wiphy_name(local->hw.wiphy), queue);
798 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
799 u16 capab, bool erp_valid, u8 erp)
801 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
804 bool use_short_preamble;
808 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
809 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
811 use_protection = false;
812 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
815 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
817 if (use_protection != bss_conf->use_cts_prot) {
818 bss_conf->use_cts_prot = use_protection;
819 changed |= BSS_CHANGED_ERP_CTS_PROT;
822 if (use_short_preamble != bss_conf->use_short_preamble) {
823 bss_conf->use_short_preamble = use_short_preamble;
824 changed |= BSS_CHANGED_ERP_PREAMBLE;
827 if (use_short_slot != bss_conf->use_short_slot) {
828 bss_conf->use_short_slot = use_short_slot;
829 changed |= BSS_CHANGED_ERP_SLOT;
835 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
836 struct ieee80211_bss *bss,
837 u32 bss_info_changed)
839 struct ieee80211_local *local = sdata->local;
841 bss_info_changed |= BSS_CHANGED_ASSOC;
842 /* set timing information */
843 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
844 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
845 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
847 bss_info_changed |= BSS_CHANGED_BEACON_INT;
848 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
849 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
851 sdata->u.mgd.associated = bss;
852 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
854 ieee80211_led_assoc(local, 1);
856 sdata->vif.bss_conf.assoc = 1;
858 * For now just always ask the driver to update the basic rateset
859 * when we have associated, we aren't checking whether it actually
862 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
864 /* And the BSSID changed - we're associated now */
865 bss_info_changed |= BSS_CHANGED_BSSID;
867 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
869 /* will be same as sdata */
870 if (local->ps_sdata) {
871 mutex_lock(&local->iflist_mtx);
872 ieee80211_recalc_ps(local, -1);
873 mutex_unlock(&local->iflist_mtx);
876 netif_tx_start_all_queues(sdata->dev);
877 netif_carrier_on(sdata->dev);
880 static enum rx_mgmt_action __must_check
881 ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
882 struct ieee80211_mgd_work *wk)
884 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
885 struct ieee80211_local *local = sdata->local;
888 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
889 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
890 sdata->dev->name, wk->bss->cbss.bssid);
893 * Most likely AP is not in the range so remove the
894 * bss struct for that AP.
896 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
899 * We might have a pending scan which had no chance to run yet
900 * due to work needing to be done. Hence, queue the STAs work
903 queue_work(local->hw.workqueue, &ifmgd->work);
904 return RX_MGMT_CFG80211_AUTH_TO;
907 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
908 sdata->dev->name, wk->bss->cbss.bssid,
912 * Direct probe is sent to broadcast address as some APs
913 * will not answer to direct packet in unassociated state.
915 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
917 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
918 mod_timer(&ifmgd->timer, wk->timeout);
924 static enum rx_mgmt_action __must_check
925 ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
926 struct ieee80211_mgd_work *wk)
928 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
929 struct ieee80211_local *local = sdata->local;
932 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
933 printk(KERN_DEBUG "%s: authentication with AP %pM"
935 sdata->dev->name, wk->bss->cbss.bssid);
938 * Most likely AP is not in the range so remove the
939 * bss struct for that AP.
941 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
944 * We might have a pending scan which had no chance to run yet
945 * due to work needing to be done. Hence, queue the STAs work
948 queue_work(local->hw.workqueue, &ifmgd->work);
949 return RX_MGMT_CFG80211_AUTH_TO;
952 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
953 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
955 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
956 wk->bss->cbss.bssid, 0);
957 wk->auth_transaction = 2;
959 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
960 mod_timer(&ifmgd->timer, wk->timeout);
965 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
966 const u8 *bssid, bool deauth)
968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
969 struct ieee80211_local *local = sdata->local;
970 struct sta_info *sta;
971 u32 changed = 0, config_changed = 0;
973 ASSERT_MGD_MTX(ifmgd);
975 ifmgd->associated = NULL;
976 memset(ifmgd->bssid, 0, ETH_ALEN);
979 * we need to commit the associated = NULL change because the
980 * scan code uses that to determine whether this iface should
981 * go to/wake up from powersave or not -- and could otherwise
982 * wake the queues erroneously.
987 * Thus, we can only afterwards stop the queues -- to account
988 * for the case where another CPU is finishing a scan at this
989 * time -- we don't want the scan code to enable queues.
992 netif_tx_stop_all_queues(sdata->dev);
993 netif_carrier_off(sdata->dev);
996 sta = sta_info_get(local, bssid);
998 ieee80211_sta_tear_down_BA_sessions(sta);
1001 changed |= ieee80211_reset_erp_info(sdata);
1003 ieee80211_led_assoc(local, 0);
1004 changed |= BSS_CHANGED_ASSOC;
1005 sdata->vif.bss_conf.assoc = false;
1007 ieee80211_set_wmm_default(sdata);
1009 ieee80211_recalc_idle(local);
1011 /* channel(_type) changes are handled by ieee80211_hw_config */
1012 local->oper_channel_type = NL80211_CHAN_NO_HT;
1014 /* on the next assoc, re-program HT parameters */
1015 sdata->ht_opmode_valid = false;
1017 local->power_constr_level = 0;
1019 del_timer_sync(&local->dynamic_ps_timer);
1020 cancel_work_sync(&local->dynamic_ps_enable_work);
1022 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1023 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1024 config_changed |= IEEE80211_CONF_CHANGE_PS;
1027 ieee80211_hw_config(local, config_changed);
1029 /* And the BSSID changed -- not very interesting here */
1030 changed |= BSS_CHANGED_BSSID;
1031 ieee80211_bss_info_change_notify(sdata, changed);
1035 sta = sta_info_get(local, bssid);
1041 sta_info_unlink(&sta);
1045 sta_info_destroy(sta);
1048 static enum rx_mgmt_action __must_check
1049 ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1050 struct ieee80211_mgd_work *wk)
1052 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1053 struct ieee80211_local *local = sdata->local;
1056 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
1057 printk(KERN_DEBUG "%s: association with AP %pM"
1059 sdata->dev->name, wk->bss->cbss.bssid);
1062 * Most likely AP is not in the range so remove the
1063 * bss struct for that AP.
1065 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1068 * We might have a pending scan which had no chance to run yet
1069 * due to work needing to be done. Hence, queue the STAs work
1072 queue_work(local->hw.workqueue, &ifmgd->work);
1073 return RX_MGMT_CFG80211_ASSOC_TO;
1076 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1077 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1078 ieee80211_send_assoc(sdata, wk);
1080 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
1081 mod_timer(&ifmgd->timer, wk->timeout);
1083 return RX_MGMT_NONE;
1086 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1087 struct ieee80211_hdr *hdr)
1090 * We can postpone the mgd.timer whenever receiving unicast frames
1091 * from AP because we know that the connection is working both ways
1092 * at that time. But multicast frames (and hence also beacons) must
1093 * be ignored here, because we need to trigger the timer during
1094 * data idle periods for sending the periodical probe request to
1097 if (!is_multicast_ether_addr(hdr->addr1))
1098 mod_timer(&sdata->u.mgd.timer,
1099 jiffies + IEEE80211_MONITORING_INTERVAL);
1102 void ieee80211_beacon_loss_work(struct work_struct *work)
1104 struct ieee80211_sub_if_data *sdata =
1105 container_of(work, struct ieee80211_sub_if_data,
1106 u.mgd.beacon_loss_work);
1107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1111 * The driver has already reported this event and we have
1112 * already sent a probe request. Maybe the AP died and the
1113 * driver keeps reporting until we disassociate... We have
1114 * to ignore that because otherwise we would continually
1115 * reset the timer and never check whether we received a
1118 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1121 mutex_lock(&ifmgd->mtx);
1123 if (!ifmgd->associated)
1126 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1127 if (net_ratelimit())
1128 printk(KERN_DEBUG "%s: driver reports beacon loss from AP "
1129 "- sending probe request\n", sdata->dev->name);
1132 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1134 mutex_lock(&sdata->local->iflist_mtx);
1135 ieee80211_recalc_ps(sdata->local, -1);
1136 mutex_unlock(&sdata->local->iflist_mtx);
1138 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1139 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1140 ssid + 2, ssid[1], NULL, 0);
1142 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1144 mutex_unlock(&ifmgd->mtx);
1147 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1149 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1151 queue_work(sdata->local->hw.workqueue,
1152 &sdata->u.mgd.beacon_loss_work);
1154 EXPORT_SYMBOL(ieee80211_beacon_loss);
1156 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1157 struct ieee80211_mgd_work *wk)
1159 wk->state = IEEE80211_MGD_STATE_IDLE;
1160 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1164 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1165 struct ieee80211_mgd_work *wk,
1166 struct ieee80211_mgmt *mgmt,
1170 struct ieee802_11_elems elems;
1172 pos = mgmt->u.auth.variable;
1173 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1174 if (!elems.challenge)
1176 ieee80211_send_auth(sdata, 3, wk->auth_alg,
1177 elems.challenge - 2, elems.challenge_len + 2,
1178 wk->bss->cbss.bssid, 1);
1179 wk->auth_transaction = 4;
1182 static enum rx_mgmt_action __must_check
1183 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1184 struct ieee80211_mgd_work *wk,
1185 struct ieee80211_mgmt *mgmt, size_t len)
1187 u16 auth_alg, auth_transaction, status_code;
1189 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1190 return RX_MGMT_NONE;
1193 return RX_MGMT_NONE;
1195 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1196 return RX_MGMT_NONE;
1198 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1199 return RX_MGMT_NONE;
1201 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1202 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1203 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1205 if (auth_alg != wk->auth_alg ||
1206 auth_transaction != wk->auth_transaction)
1207 return RX_MGMT_NONE;
1209 if (status_code != WLAN_STATUS_SUCCESS) {
1210 list_del(&wk->list);
1212 return RX_MGMT_CFG80211_AUTH;
1215 switch (wk->auth_alg) {
1216 case WLAN_AUTH_OPEN:
1217 case WLAN_AUTH_LEAP:
1219 ieee80211_auth_completed(sdata, wk);
1220 return RX_MGMT_CFG80211_AUTH;
1221 case WLAN_AUTH_SHARED_KEY:
1222 if (wk->auth_transaction == 4) {
1223 ieee80211_auth_completed(sdata, wk);
1224 return RX_MGMT_CFG80211_AUTH;
1226 ieee80211_auth_challenge(sdata, wk, mgmt, len);
1230 return RX_MGMT_NONE;
1234 static enum rx_mgmt_action __must_check
1235 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1236 struct ieee80211_mgd_work *wk,
1237 struct ieee80211_mgmt *mgmt, size_t len)
1239 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1240 const u8 *bssid = NULL;
1244 return RX_MGMT_NONE;
1246 ASSERT_MGD_MTX(ifmgd);
1249 bssid = wk->bss->cbss.bssid;
1251 bssid = ifmgd->associated->cbss.bssid;
1253 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1255 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1256 sdata->dev->name, bssid, reason_code);
1259 ieee80211_set_disassoc(sdata, bssid, true);
1261 list_del(&wk->list);
1265 return RX_MGMT_CFG80211_DEAUTH;
1269 static enum rx_mgmt_action __must_check
1270 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1271 struct ieee80211_mgmt *mgmt, size_t len)
1273 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1277 return RX_MGMT_NONE;
1279 ASSERT_MGD_MTX(ifmgd);
1281 if (WARN_ON(!ifmgd->associated))
1282 return RX_MGMT_NONE;
1284 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1285 return RX_MGMT_NONE;
1287 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1289 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1290 sdata->dev->name, reason_code);
1292 ieee80211_set_disassoc(sdata, ifmgd->associated->cbss.bssid, false);
1293 return RX_MGMT_CFG80211_DISASSOC;
1297 static enum rx_mgmt_action __must_check
1298 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1299 struct ieee80211_mgd_work *wk,
1300 struct ieee80211_mgmt *mgmt, size_t len,
1303 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1304 struct ieee80211_local *local = sdata->local;
1305 struct ieee80211_supported_band *sband;
1306 struct sta_info *sta;
1307 u32 rates, basic_rates;
1308 u16 capab_info, status_code, aid;
1309 struct ieee802_11_elems elems;
1310 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1314 bool have_higher_than_11mbit = false, newsta = false;
1315 u16 ap_ht_cap_flags;
1318 * AssocResp and ReassocResp have identical structure, so process both
1319 * of them in this function.
1323 return RX_MGMT_NONE;
1325 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1326 return RX_MGMT_NONE;
1328 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1329 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1330 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1332 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1333 "status=%d aid=%d)\n",
1334 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1335 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1337 pos = mgmt->u.assoc_resp.variable;
1338 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1340 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1341 elems.timeout_int && elems.timeout_int_len == 5 &&
1342 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1344 tu = get_unaligned_le32(elems.timeout_int + 1);
1345 ms = tu * 1024 / 1000;
1346 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1347 "comeback duration %u TU (%u ms)\n",
1348 sdata->dev->name, tu, ms);
1349 wk->timeout = jiffies + msecs_to_jiffies(ms);
1350 if (ms > IEEE80211_ASSOC_TIMEOUT)
1351 mod_timer(&ifmgd->timer,
1352 jiffies + msecs_to_jiffies(ms));
1353 return RX_MGMT_NONE;
1356 if (status_code != WLAN_STATUS_SUCCESS) {
1357 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1358 sdata->dev->name, status_code);
1359 list_del(&wk->list);
1361 return RX_MGMT_CFG80211_ASSOC;
1364 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1365 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1366 "set\n", sdata->dev->name, aid);
1367 aid &= ~(BIT(15) | BIT(14));
1369 if (!elems.supp_rates) {
1370 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1372 return RX_MGMT_NONE;
1375 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1380 /* Add STA entry for the AP */
1381 sta = sta_info_get(local, wk->bss->cbss.bssid);
1387 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
1389 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1390 " the AP\n", sdata->dev->name);
1391 return RX_MGMT_NONE;
1394 /* update new sta with its last rx activity */
1395 sta->last_rx = jiffies;
1397 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1399 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1400 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1407 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1409 for (i = 0; i < elems.supp_rates_len; i++) {
1410 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1411 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1414 have_higher_than_11mbit = true;
1416 for (j = 0; j < sband->n_bitrates; j++) {
1417 if (sband->bitrates[j].bitrate == rate) {
1420 basic_rates |= BIT(j);
1426 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1427 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1428 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1431 have_higher_than_11mbit = true;
1433 for (j = 0; j < sband->n_bitrates; j++) {
1434 if (sband->bitrates[j].bitrate == rate) {
1437 basic_rates |= BIT(j);
1443 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1444 sdata->vif.bss_conf.basic_rates = basic_rates;
1446 /* cf. IEEE 802.11 9.2.12 */
1447 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1448 have_higher_than_11mbit)
1449 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1451 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1453 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1454 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1455 elems.ht_cap_elem, &sta->sta.ht_cap);
1457 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1459 rate_control_rate_init(sta);
1461 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1462 set_sta_flags(sta, WLAN_STA_MFP);
1464 if (elems.wmm_param)
1465 set_sta_flags(sta, WLAN_STA_WME);
1468 int err = sta_info_insert(sta);
1470 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1471 " the AP (error %d)\n", sdata->dev->name, err);
1473 return RX_MGMT_NONE;
1479 if (elems.wmm_param)
1480 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1481 elems.wmm_param_len);
1483 ieee80211_set_wmm_default(sdata);
1485 if (elems.ht_info_elem && elems.wmm_param &&
1486 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1487 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1488 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1489 wk->bss->cbss.bssid,
1492 /* set AID and assoc capability,
1493 * ieee80211_set_associated() will tell the driver */
1494 bss_conf->aid = aid;
1495 bss_conf->assoc_capability = capab_info;
1496 ieee80211_set_associated(sdata, wk->bss, changed);
1499 * initialise the time of last beacon to be the association time,
1500 * otherwise beacon loss check will trigger immediately
1502 ifmgd->last_beacon = jiffies;
1504 list_del(&wk->list);
1506 return RX_MGMT_CFG80211_ASSOC;
1510 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1511 struct ieee80211_mgmt *mgmt,
1513 struct ieee80211_rx_status *rx_status,
1514 struct ieee802_11_elems *elems,
1517 struct ieee80211_local *local = sdata->local;
1519 struct ieee80211_bss *bss;
1520 struct ieee80211_channel *channel;
1522 if (elems->ds_params && elems->ds_params_len == 1)
1523 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1525 freq = rx_status->freq;
1527 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1529 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1532 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1535 ieee80211_rx_bss_put(local, bss);
1537 if (!sdata->u.mgd.associated)
1540 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1541 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1543 struct ieee80211_channel_sw_ie *sw_elem =
1544 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1545 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1550 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1551 struct ieee80211_mgd_work *wk,
1552 struct ieee80211_mgmt *mgmt, size_t len,
1553 struct ieee80211_rx_status *rx_status)
1555 struct ieee80211_if_managed *ifmgd;
1557 struct ieee802_11_elems elems;
1559 ifmgd = &sdata->u.mgd;
1561 ASSERT_MGD_MTX(ifmgd);
1563 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1564 return; /* ignore ProbeResp to foreign address */
1566 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1570 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1573 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1575 /* direct probe may be part of the association flow */
1576 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
1577 printk(KERN_DEBUG "%s direct probe responded\n",
1580 wk->state = IEEE80211_MGD_STATE_AUTH;
1581 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
1584 if (ifmgd->associated &&
1585 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
1586 ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1587 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1588 mutex_lock(&sdata->local->iflist_mtx);
1589 ieee80211_recalc_ps(sdata->local, -1);
1590 mutex_unlock(&sdata->local->iflist_mtx);
1595 * This is the canonical list of information elements we care about,
1596 * the filter code also gives us all changes to the Microsoft OUI
1597 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1599 * We implement beacon filtering in software since that means we can
1600 * avoid processing the frame here and in cfg80211, and userspace
1601 * will not be able to tell whether the hardware supports it or not.
1603 * XXX: This list needs to be dynamic -- userspace needs to be able to
1604 * add items it requires. It also needs to be able to tell us to
1605 * look out for other vendor IEs.
1607 static const u64 care_about_ies =
1608 (1ULL << WLAN_EID_COUNTRY) |
1609 (1ULL << WLAN_EID_ERP_INFO) |
1610 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1611 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1612 (1ULL << WLAN_EID_HT_CAPABILITY) |
1613 (1ULL << WLAN_EID_HT_INFORMATION);
1615 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1616 struct ieee80211_mgmt *mgmt,
1618 struct ieee80211_rx_status *rx_status)
1620 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1622 struct ieee802_11_elems elems;
1623 struct ieee80211_local *local = sdata->local;
1625 bool erp_valid, directed_tim = false;
1630 ASSERT_MGD_MTX(ifmgd);
1632 /* Process beacon from the current BSS */
1633 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1637 if (rx_status->freq != local->hw.conf.channel->center_freq)
1640 if (WARN_ON(!ifmgd->associated))
1643 bssid = ifmgd->associated->cbss.bssid;
1645 if (WARN_ON(memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0))
1648 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1649 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1650 if (net_ratelimit()) {
1651 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1652 "to a received beacon\n", sdata->dev->name);
1655 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1656 mutex_lock(&local->iflist_mtx);
1657 ieee80211_recalc_ps(local, -1);
1658 mutex_unlock(&local->iflist_mtx);
1661 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1662 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1663 len - baselen, &elems,
1664 care_about_ies, ncrc);
1666 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1667 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1670 if (ncrc != ifmgd->beacon_crc) {
1671 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1674 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1675 elems.wmm_param_len);
1678 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1680 if (local->hw.conf.dynamic_ps_timeout > 0) {
1681 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1682 ieee80211_hw_config(local,
1683 IEEE80211_CONF_CHANGE_PS);
1684 ieee80211_send_nullfunc(local, sdata, 0);
1686 local->pspolling = true;
1689 * Here is assumed that the driver will be
1690 * able to send ps-poll frame and receive a
1691 * response even though power save mode is
1692 * enabled, but some drivers might require
1693 * to disable power save here. This needs
1694 * to be investigated.
1696 ieee80211_send_pspoll(local, sdata);
1701 if (ncrc == ifmgd->beacon_crc)
1703 ifmgd->beacon_crc = ncrc;
1705 if (elems.erp_info && elems.erp_info_len >= 1) {
1707 erp_value = elems.erp_info[0];
1711 changed |= ieee80211_handle_bss_capability(sdata,
1712 le16_to_cpu(mgmt->u.beacon.capab_info),
1713 erp_valid, erp_value);
1716 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1717 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1718 struct sta_info *sta;
1719 struct ieee80211_supported_band *sband;
1720 u16 ap_ht_cap_flags;
1724 sta = sta_info_get(local, bssid);
1725 if (WARN_ON(!sta)) {
1730 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1732 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1733 elems.ht_cap_elem, &sta->sta.ht_cap);
1735 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1739 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1740 bssid, ap_ht_cap_flags);
1743 if (elems.country_elem) {
1744 /* Note we are only reviewing this on beacons
1745 * for the BSSID we are associated to */
1746 regulatory_hint_11d(local->hw.wiphy,
1747 elems.country_elem, elems.country_elem_len);
1749 /* TODO: IBSS also needs this */
1750 if (elems.pwr_constr_elem)
1751 ieee80211_handle_pwr_constr(sdata,
1752 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1753 elems.pwr_constr_elem,
1754 elems.pwr_constr_elem_len);
1757 ieee80211_bss_info_change_notify(sdata, changed);
1760 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1761 struct sk_buff *skb)
1763 struct ieee80211_local *local = sdata->local;
1764 struct ieee80211_mgmt *mgmt;
1768 return RX_DROP_MONITOR;
1770 mgmt = (struct ieee80211_mgmt *) skb->data;
1771 fc = le16_to_cpu(mgmt->frame_control);
1773 switch (fc & IEEE80211_FCTL_STYPE) {
1774 case IEEE80211_STYPE_PROBE_REQ:
1775 case IEEE80211_STYPE_PROBE_RESP:
1776 case IEEE80211_STYPE_BEACON:
1777 case IEEE80211_STYPE_AUTH:
1778 case IEEE80211_STYPE_ASSOC_RESP:
1779 case IEEE80211_STYPE_REASSOC_RESP:
1780 case IEEE80211_STYPE_DEAUTH:
1781 case IEEE80211_STYPE_DISASSOC:
1782 case IEEE80211_STYPE_ACTION:
1783 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1784 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1788 return RX_DROP_MONITOR;
1791 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1792 struct sk_buff *skb)
1794 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1795 struct ieee80211_rx_status *rx_status;
1796 struct ieee80211_mgmt *mgmt;
1797 struct ieee80211_mgd_work *wk;
1798 enum rx_mgmt_action rma = RX_MGMT_NONE;
1801 rx_status = (struct ieee80211_rx_status *) skb->cb;
1802 mgmt = (struct ieee80211_mgmt *) skb->data;
1803 fc = le16_to_cpu(mgmt->frame_control);
1805 mutex_lock(&ifmgd->mtx);
1807 if (ifmgd->associated &&
1808 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1810 switch (fc & IEEE80211_FCTL_STYPE) {
1811 case IEEE80211_STYPE_BEACON:
1812 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1815 case IEEE80211_STYPE_PROBE_RESP:
1816 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1817 skb->len, rx_status);
1819 case IEEE80211_STYPE_DEAUTH:
1820 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1823 case IEEE80211_STYPE_DISASSOC:
1824 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1826 case IEEE80211_STYPE_ACTION:
1827 /* XXX: differentiate, can only happen for CSA now! */
1828 ieee80211_sta_process_chanswitch(sdata,
1829 &mgmt->u.action.u.chan_switch.sw_elem,
1833 mutex_unlock(&ifmgd->mtx);
1839 case RX_MGMT_CFG80211_DEAUTH:
1840 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1842 case RX_MGMT_CFG80211_DISASSOC:
1843 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
1846 WARN(1, "unexpected: %d", rma);
1851 list_for_each_entry(wk, &ifmgd->work_list, list) {
1852 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1855 switch (fc & IEEE80211_FCTL_STYPE) {
1856 case IEEE80211_STYPE_PROBE_RESP:
1857 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1860 case IEEE80211_STYPE_AUTH:
1861 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1863 case IEEE80211_STYPE_ASSOC_RESP:
1864 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1867 case IEEE80211_STYPE_REASSOC_RESP:
1868 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1871 case IEEE80211_STYPE_DEAUTH:
1872 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
1877 * We've processed this frame for that work, so it can't
1878 * belong to another work struct.
1879 * NB: this is also required for correctness because the
1880 * called functions can free 'wk', and for 'rma'!
1885 mutex_unlock(&ifmgd->mtx);
1891 case RX_MGMT_CFG80211_AUTH:
1892 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
1894 case RX_MGMT_CFG80211_ASSOC:
1895 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
1898 WARN(1, "unexpected: %d", rma);
1905 static void ieee80211_sta_timer(unsigned long data)
1907 struct ieee80211_sub_if_data *sdata =
1908 (struct ieee80211_sub_if_data *) data;
1909 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1910 struct ieee80211_local *local = sdata->local;
1912 if (local->quiescing) {
1913 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1917 queue_work(local->hw.workqueue, &ifmgd->work);
1920 static void ieee80211_sta_work(struct work_struct *work)
1922 struct ieee80211_sub_if_data *sdata =
1923 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
1924 struct ieee80211_local *local = sdata->local;
1925 struct ieee80211_if_managed *ifmgd;
1926 struct sk_buff *skb;
1927 struct ieee80211_mgd_work *wk, *tmp;
1928 LIST_HEAD(free_work);
1929 enum rx_mgmt_action rma;
1930 bool anybusy = false;
1932 if (!netif_running(sdata->dev))
1935 if (local->sw_scanning || local->hw_scanning)
1938 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1942 * Nothing should have been stuffed into the workqueue during
1943 * the suspend->resume cycle. If this WARN is seen then there
1944 * is a bug with either the driver suspend or something in
1945 * mac80211 stuffing into the workqueue which we haven't yet
1946 * cleared during mac80211's suspend cycle.
1948 if (WARN_ON(local->suspended))
1951 ifmgd = &sdata->u.mgd;
1953 /* first process frames to avoid timing out while a frame is pending */
1954 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
1955 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1957 /* then process the rest of the work */
1958 mutex_lock(&ifmgd->mtx);
1960 list_for_each_entry(wk, &ifmgd->work_list, list) {
1961 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
1967 ieee80211_recalc_idle(local);
1970 mutex_unlock(&ifmgd->mtx);
1972 if (test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
1973 queue_delayed_work(local->hw.workqueue,
1975 round_jiffies_relative(0));
1979 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
1980 if (time_before(jiffies, wk->timeout))
1983 switch (wk->state) {
1987 case IEEE80211_MGD_STATE_IDLE:
1991 case IEEE80211_MGD_STATE_PROBE:
1992 rma = ieee80211_direct_probe(sdata, wk);
1994 case IEEE80211_MGD_STATE_AUTH:
1995 rma = ieee80211_authenticate(sdata, wk);
1997 case IEEE80211_MGD_STATE_ASSOC:
1998 rma = ieee80211_associate(sdata, wk);
2004 /* no action required */
2006 case RX_MGMT_CFG80211_AUTH_TO:
2007 case RX_MGMT_CFG80211_ASSOC_TO:
2008 list_del(&wk->list);
2009 list_add(&wk->list, &free_work);
2010 wk->tries = rma; /* small abuse but only local */
2013 WARN(1, "unexpected: %d", rma);
2017 mutex_unlock(&ifmgd->mtx);
2019 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2020 switch (wk->tries) {
2021 case RX_MGMT_CFG80211_AUTH_TO:
2022 cfg80211_send_auth_timeout(sdata->dev,
2023 wk->bss->cbss.bssid);
2025 case RX_MGMT_CFG80211_ASSOC_TO:
2026 cfg80211_send_assoc_timeout(sdata->dev,
2027 wk->bss->cbss.bssid);
2030 WARN(1, "unexpected: %d", wk->tries);
2033 list_del(&wk->list);
2037 ieee80211_recalc_idle(local);
2040 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2042 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2044 * Need to update last_beacon to avoid beacon loss
2047 sdata->u.mgd.last_beacon = jiffies;
2049 queue_work(sdata->local->hw.workqueue,
2050 &sdata->u.mgd.work);
2055 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2060 * we need to use atomic bitops for the running bits
2061 * only because both timers might fire at the same
2062 * time -- the code here is properly synchronised.
2065 cancel_work_sync(&ifmgd->work);
2066 cancel_work_sync(&ifmgd->beacon_loss_work);
2067 if (del_timer_sync(&ifmgd->timer))
2068 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2070 cancel_work_sync(&ifmgd->chswitch_work);
2071 if (del_timer_sync(&ifmgd->chswitch_timer))
2072 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2075 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2077 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2079 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2080 add_timer(&ifmgd->timer);
2081 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2082 add_timer(&ifmgd->chswitch_timer);
2086 /* interface setup */
2087 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2089 struct ieee80211_if_managed *ifmgd;
2091 ifmgd = &sdata->u.mgd;
2092 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2093 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2094 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2095 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2096 (unsigned long) sdata);
2097 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2098 (unsigned long) sdata);
2099 skb_queue_head_init(&ifmgd->skb_queue);
2101 INIT_LIST_HEAD(&ifmgd->work_list);
2103 ifmgd->capab = WLAN_CAPABILITY_ESS;
2105 if (sdata->local->hw.queues >= 4)
2106 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2108 mutex_init(&ifmgd->mtx);
2111 /* scan finished notification */
2112 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2114 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2116 /* Restart STA timers */
2118 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2119 ieee80211_restart_sta_timer(sdata);
2123 int ieee80211_max_network_latency(struct notifier_block *nb,
2124 unsigned long data, void *dummy)
2126 s32 latency_usec = (s32) data;
2127 struct ieee80211_local *local =
2128 container_of(nb, struct ieee80211_local,
2129 network_latency_notifier);
2131 mutex_lock(&local->iflist_mtx);
2132 ieee80211_recalc_ps(local, latency_usec);
2133 mutex_unlock(&local->iflist_mtx);
2139 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2140 struct cfg80211_auth_request *req)
2142 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2144 struct ieee80211_mgd_work *wk;
2147 switch (req->auth_type) {
2148 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2149 auth_alg = WLAN_AUTH_OPEN;
2151 case NL80211_AUTHTYPE_SHARED_KEY:
2152 auth_alg = WLAN_AUTH_SHARED_KEY;
2154 case NL80211_AUTHTYPE_FT:
2155 auth_alg = WLAN_AUTH_FT;
2157 case NL80211_AUTHTYPE_NETWORK_EAP:
2158 auth_alg = WLAN_AUTH_LEAP;
2164 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2168 wk->bss = (void *)req->bss;
2170 if (req->ie && req->ie_len) {
2171 memcpy(wk->ie, req->ie, req->ie_len);
2172 wk->ie_len = req->ie_len;
2175 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2176 memcpy(wk->ssid, ssid + 2, ssid[1]);
2177 wk->ssid_len = ssid[1];
2179 wk->state = IEEE80211_MGD_STATE_PROBE;
2180 wk->auth_alg = auth_alg;
2183 * XXX: if still associated need to tell AP that we're going
2184 * to sleep and then change channel etc.
2186 sdata->local->oper_channel = req->bss->channel;
2187 ieee80211_hw_config(sdata->local, 0);
2189 mutex_lock(&ifmgd->mtx);
2190 list_add(&wk->list, &sdata->u.mgd.work_list);
2191 mutex_unlock(&ifmgd->mtx);
2193 queue_work(sdata->local->hw.workqueue, &sdata->u.mgd.work);
2197 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2198 struct cfg80211_assoc_request *req)
2200 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2201 struct ieee80211_mgd_work *wk, *found = NULL;
2204 mutex_lock(&ifmgd->mtx);
2206 list_for_each_entry(wk, &ifmgd->work_list, list) {
2207 if (&wk->bss->cbss == req->bss &&
2208 wk->state == IEEE80211_MGD_STATE_IDLE) {
2219 list_del(&found->list);
2221 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2223 list_add(&found->list, &ifmgd->work_list);
2228 list_add(&wk->list, &ifmgd->work_list);
2230 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2232 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2233 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2234 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2235 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2236 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2238 sdata->local->oper_channel = req->bss->channel;
2239 ieee80211_hw_config(sdata->local, 0);
2241 if (req->ie && req->ie_len) {
2242 memcpy(wk->ie, req->ie, req->ie_len);
2243 wk->ie_len = req->ie_len;
2247 if (req->prev_bssid)
2248 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2250 wk->state = IEEE80211_MGD_STATE_ASSOC;
2254 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2255 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2257 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2258 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2261 if (req->crypto.control_port)
2262 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2264 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2266 queue_work(sdata->local->hw.workqueue, &sdata->u.mgd.work);
2271 mutex_unlock(&ifmgd->mtx);
2275 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2276 struct cfg80211_deauth_request *req)
2278 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2279 struct ieee80211_mgd_work *wk;
2280 const u8 *bssid = NULL;
2282 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2283 sdata->dev->name, req->reason_code);
2285 mutex_lock(&ifmgd->mtx);
2287 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2288 bssid = req->bss->bssid;
2289 ieee80211_set_disassoc(sdata, bssid, true);
2290 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2291 if (&wk->bss->cbss == req->bss) {
2292 bssid = req->bss->bssid;
2293 list_del(&wk->list);
2299 /* cfg80211 should catch this... */
2300 if (WARN_ON(!bssid)) {
2301 mutex_unlock(&ifmgd->mtx);
2305 mutex_unlock(&ifmgd->mtx);
2307 ieee80211_send_deauth_disassoc(sdata, bssid,
2308 IEEE80211_STYPE_DEAUTH, req->reason_code);
2313 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2314 struct cfg80211_disassoc_request *req)
2316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2318 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2319 sdata->dev->name, req->reason_code);
2321 mutex_lock(&ifmgd->mtx);
2323 /* cfg80211 should catch that */
2324 if (WARN_ON(&ifmgd->associated->cbss != req->bss)) {
2325 mutex_unlock(&ifmgd->mtx);
2329 ieee80211_set_disassoc(sdata, req->bss->bssid, false);
2331 mutex_unlock(&ifmgd->mtx);
2333 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2334 IEEE80211_STYPE_DISASSOC, req->reason_code);