2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/pm_qos_params.h>
21 #include <linux/crc32.h>
22 #include <net/mac80211.h>
23 #include <asm/unaligned.h>
25 #include "ieee80211_i.h"
26 #include "driver-ops.h"
30 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
31 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32 #define IEEE80211_AUTH_MAX_TRIES 3
33 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34 #define IEEE80211_ASSOC_MAX_TRIES 3
35 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
36 #define IEEE80211_PROBE_WAIT (HZ / 5)
37 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
38 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
40 #define TMR_RUNNING_TIMER 0
41 #define TMR_RUNNING_CHANSW 1
44 static int ecw2cw(int ecw)
46 return (1 << ecw) - 1;
49 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
50 struct ieee80211_supported_band *sband,
56 for (i = 0; i < bss->supp_rates_len; i++) {
57 int rate = (bss->supp_rates[i] & 0x7F) * 5;
59 for (j = 0; j < sband->n_bitrates; j++)
60 if (sband->bitrates[j].bitrate == rate) {
71 * ieee80211_enable_ht should be called only after the operating band
72 * has been determined as ht configuration depends on the hw's
73 * HT abilities for a specific band.
75 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
76 struct ieee80211_ht_info *hti,
79 struct ieee80211_local *local = sdata->local;
80 struct ieee80211_supported_band *sband;
81 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
85 bool enable_ht = true, ht_changed;
86 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
88 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
90 /* HT is not supported */
91 if (!sband->ht_cap.ht_supported)
94 /* check that channel matches the right operating channel */
95 if (local->hw.conf.channel->center_freq !=
96 ieee80211_channel_to_frequency(hti->control_chan))
100 channel_type = NL80211_CHAN_HT20;
102 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
103 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
104 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
105 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
106 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
107 if (!(local->hw.conf.channel->flags &
108 IEEE80211_CHAN_NO_HT40PLUS))
109 channel_type = NL80211_CHAN_HT40PLUS;
111 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
112 if (!(local->hw.conf.channel->flags &
113 IEEE80211_CHAN_NO_HT40MINUS))
114 channel_type = NL80211_CHAN_HT40MINUS;
120 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
121 channel_type != local->hw.conf.channel_type;
123 local->oper_channel_type = channel_type;
126 /* channel_type change automatically detected */
127 ieee80211_hw_config(local, 0);
131 sta = sta_info_get(local, ifmgd->bssid);
133 rate_control_rate_update(local, sband, sta,
134 IEEE80211_RC_HT_CHANGED);
143 ht_opmode = le16_to_cpu(hti->operation_mode);
145 /* if bss configuration changed store the new one */
146 if (!sdata->ht_opmode_valid ||
147 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
148 changed |= BSS_CHANGED_HT;
149 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
150 sdata->ht_opmode_valid = true;
156 /* frame sending functions */
158 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
161 struct ieee80211_local *local = sdata->local;
163 struct ieee80211_mgmt *mgmt;
165 const u8 *ies, *ht_ie;
166 int i, len, count, rates_len, supp_rates_len;
168 struct ieee80211_bss *bss;
170 struct ieee80211_supported_band *sband;
173 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
174 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
177 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
178 "frame\n", sdata->dev->name);
181 skb_reserve(skb, local->hw.extra_tx_headroom);
183 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
185 capab = ifmgd->capab;
187 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
188 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
189 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
190 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
191 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
194 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
195 local->hw.conf.channel->center_freq,
196 ifmgd->ssid, ifmgd->ssid_len);
198 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
199 capab |= WLAN_CAPABILITY_PRIVACY;
203 /* get all rates supported by the device and the AP as
204 * some APs don't like getting a superset of their rates
205 * in the association request (e.g. D-Link DAP 1353 in
207 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
209 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
210 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
211 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
213 ieee80211_rx_bss_put(local, bss);
216 rates_len = sband->n_bitrates;
219 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
221 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
222 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
223 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
225 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
227 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
228 IEEE80211_STYPE_REASSOC_REQ);
229 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
230 mgmt->u.reassoc_req.listen_interval =
231 cpu_to_le16(local->hw.conf.listen_interval);
232 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
236 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
237 IEEE80211_STYPE_ASSOC_REQ);
238 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
239 mgmt->u.assoc_req.listen_interval =
240 cpu_to_le16(local->hw.conf.listen_interval);
244 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
245 *pos++ = WLAN_EID_SSID;
246 *pos++ = ifmgd->ssid_len;
247 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
249 /* add all rates which were marked to be used above */
250 supp_rates_len = rates_len;
251 if (supp_rates_len > 8)
254 len = sband->n_bitrates;
255 pos = skb_put(skb, supp_rates_len + 2);
256 *pos++ = WLAN_EID_SUPP_RATES;
257 *pos++ = supp_rates_len;
260 for (i = 0; i < sband->n_bitrates; i++) {
261 if (BIT(i) & rates) {
262 int rate = sband->bitrates[i].bitrate;
263 *pos++ = (u8) (rate / 5);
269 if (rates_len > count) {
270 pos = skb_put(skb, rates_len - count + 2);
271 *pos++ = WLAN_EID_EXT_SUPP_RATES;
272 *pos++ = rates_len - count;
274 for (i++; i < sband->n_bitrates; i++) {
275 if (BIT(i) & rates) {
276 int rate = sband->bitrates[i].bitrate;
277 *pos++ = (u8) (rate / 5);
282 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
283 /* 1. power capabilities */
284 pos = skb_put(skb, 4);
285 *pos++ = WLAN_EID_PWR_CAPABILITY;
287 *pos++ = 0; /* min tx power */
288 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
290 /* 2. supported channels */
291 /* TODO: get this in reg domain format */
292 pos = skb_put(skb, 2 * sband->n_channels + 2);
293 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
294 *pos++ = 2 * sband->n_channels;
295 for (i = 0; i < sband->n_channels; i++) {
296 *pos++ = ieee80211_frequency_to_channel(
297 sband->channels[i].center_freq);
298 *pos++ = 1; /* one channel in the subband*/
302 if (ifmgd->extra_ie) {
303 pos = skb_put(skb, ifmgd->extra_ie_len);
304 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
307 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
308 pos = skb_put(skb, 9);
309 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
310 *pos++ = 7; /* len */
311 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
314 *pos++ = 2; /* WME */
315 *pos++ = 0; /* WME info */
316 *pos++ = 1; /* WME ver */
320 /* wmm support is a must to HT */
322 * IEEE802.11n does not allow TKIP/WEP as pairwise
323 * ciphers in HT mode. We still associate in non-ht
324 * mode (11a/b/g) if any one of these ciphers is
325 * configured as pairwise.
327 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
328 sband->ht_cap.ht_supported &&
329 (ht_ie = ieee80211_bss_get_ie(&bss->cbss, WLAN_EID_HT_INFORMATION)) &&
330 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
331 (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
332 struct ieee80211_ht_info *ht_info =
333 (struct ieee80211_ht_info *)(ht_ie + 2);
334 u16 cap = sband->ht_cap.cap;
336 u32 flags = local->hw.conf.channel->flags;
338 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
339 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
340 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
341 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
342 cap &= ~IEEE80211_HT_CAP_SGI_40;
345 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
346 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
347 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
348 cap &= ~IEEE80211_HT_CAP_SGI_40;
353 tmp = cpu_to_le16(cap);
354 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
355 *pos++ = WLAN_EID_HT_CAPABILITY;
356 *pos++ = sizeof(struct ieee80211_ht_cap);
357 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
358 memcpy(pos, &tmp, sizeof(u16));
360 /* TODO: needs a define here for << 2 */
361 *pos++ = sband->ht_cap.ampdu_factor |
362 (sband->ht_cap.ampdu_density << 2);
363 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
366 kfree(ifmgd->assocreq_ies);
367 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
368 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
369 if (ifmgd->assocreq_ies)
370 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
372 ieee80211_tx_skb(sdata, skb, 0);
376 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
377 u16 stype, u16 reason)
379 struct ieee80211_local *local = sdata->local;
380 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
382 struct ieee80211_mgmt *mgmt;
384 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
386 printk(KERN_DEBUG "%s: failed to allocate buffer for "
387 "deauth/disassoc frame\n", sdata->dev->name);
390 skb_reserve(skb, local->hw.extra_tx_headroom);
392 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
394 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
395 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
396 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
397 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
399 /* u.deauth.reason_code == u.disassoc.reason_code */
400 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
402 if (stype == IEEE80211_STYPE_DEAUTH)
403 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len,
406 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len,
408 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
411 void ieee80211_send_pspoll(struct ieee80211_local *local,
412 struct ieee80211_sub_if_data *sdata)
414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
415 struct ieee80211_pspoll *pspoll;
419 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
421 printk(KERN_DEBUG "%s: failed to allocate buffer for "
422 "pspoll frame\n", sdata->dev->name);
425 skb_reserve(skb, local->hw.extra_tx_headroom);
427 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
428 memset(pspoll, 0, sizeof(*pspoll));
429 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
430 pspoll->frame_control = cpu_to_le16(fc);
431 pspoll->aid = cpu_to_le16(ifmgd->aid);
433 /* aid in PS-Poll has its two MSBs each set to 1 */
434 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
436 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
437 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
439 ieee80211_tx_skb(sdata, skb, 0);
442 void ieee80211_send_nullfunc(struct ieee80211_local *local,
443 struct ieee80211_sub_if_data *sdata,
447 struct ieee80211_hdr *nullfunc;
450 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
453 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
455 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
456 "frame\n", sdata->dev->name);
459 skb_reserve(skb, local->hw.extra_tx_headroom);
461 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
462 memset(nullfunc, 0, 24);
463 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
464 IEEE80211_FCTL_TODS);
466 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
467 nullfunc->frame_control = fc;
468 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
469 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
470 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
472 ieee80211_tx_skb(sdata, skb, 0);
475 /* spectrum management related things */
476 static void ieee80211_chswitch_work(struct work_struct *work)
478 struct ieee80211_sub_if_data *sdata =
479 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
480 struct ieee80211_bss *bss;
481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
483 if (!netif_running(sdata->dev))
486 bss = ieee80211_rx_bss_get(sdata->local, ifmgd->bssid,
487 sdata->local->hw.conf.channel->center_freq,
488 ifmgd->ssid, ifmgd->ssid_len);
492 sdata->local->oper_channel = sdata->local->csa_channel;
493 /* XXX: shouldn't really modify cfg80211-owned data! */
494 if (!ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL))
495 bss->cbss.channel = sdata->local->oper_channel;
497 ieee80211_rx_bss_put(sdata->local, bss);
499 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
500 ieee80211_wake_queues_by_reason(&sdata->local->hw,
501 IEEE80211_QUEUE_STOP_REASON_CSA);
504 static void ieee80211_chswitch_timer(unsigned long data)
506 struct ieee80211_sub_if_data *sdata =
507 (struct ieee80211_sub_if_data *) data;
508 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
510 if (sdata->local->quiescing) {
511 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
515 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
518 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
519 struct ieee80211_channel_sw_ie *sw_elem,
520 struct ieee80211_bss *bss)
522 struct ieee80211_channel *new_ch;
523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
524 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
526 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATED)
529 if (sdata->local->sw_scanning || sdata->local->hw_scanning)
532 /* Disregard subsequent beacons if we are already running a timer
535 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
538 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
539 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
542 sdata->local->csa_channel = new_ch;
544 if (sw_elem->count <= 1) {
545 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
547 ieee80211_stop_queues_by_reason(&sdata->local->hw,
548 IEEE80211_QUEUE_STOP_REASON_CSA);
549 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
550 mod_timer(&ifmgd->chswitch_timer,
552 msecs_to_jiffies(sw_elem->count *
553 bss->cbss.beacon_interval));
557 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
558 u16 capab_info, u8 *pwr_constr_elem,
559 u8 pwr_constr_elem_len)
561 struct ieee80211_conf *conf = &sdata->local->hw.conf;
563 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
566 /* Power constraint IE length should be 1 octet */
567 if (pwr_constr_elem_len != 1)
570 if ((*pwr_constr_elem <= conf->channel->max_power) &&
571 (*pwr_constr_elem != sdata->local->power_constr_level)) {
572 sdata->local->power_constr_level = *pwr_constr_elem;
573 ieee80211_hw_config(sdata->local, 0);
578 static void ieee80211_enable_ps(struct ieee80211_local *local,
579 struct ieee80211_sub_if_data *sdata)
581 struct ieee80211_conf *conf = &local->hw.conf;
584 * If we are scanning right now then the parameters will
585 * take effect when scan finishes.
587 if (local->hw_scanning || local->sw_scanning)
590 if (conf->dynamic_ps_timeout > 0 &&
591 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
592 mod_timer(&local->dynamic_ps_timer, jiffies +
593 msecs_to_jiffies(conf->dynamic_ps_timeout));
595 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
596 ieee80211_send_nullfunc(local, sdata, 1);
597 conf->flags |= IEEE80211_CONF_PS;
598 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
602 static void ieee80211_change_ps(struct ieee80211_local *local)
604 struct ieee80211_conf *conf = &local->hw.conf;
606 if (local->ps_sdata) {
607 ieee80211_enable_ps(local, local->ps_sdata);
608 } else if (conf->flags & IEEE80211_CONF_PS) {
609 conf->flags &= ~IEEE80211_CONF_PS;
610 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
611 del_timer_sync(&local->dynamic_ps_timer);
612 cancel_work_sync(&local->dynamic_ps_enable_work);
616 /* need to hold RTNL or interface lock */
617 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
619 struct ieee80211_sub_if_data *sdata, *found = NULL;
622 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
623 local->ps_sdata = NULL;
627 list_for_each_entry(sdata, &local->interfaces, list) {
628 if (!netif_running(sdata->dev))
630 if (sdata->vif.type != NL80211_IFTYPE_STATION)
636 if (count == 1 && found->u.mgd.powersave &&
637 (found->u.mgd.flags & IEEE80211_STA_ASSOCIATED) &&
638 !(found->u.mgd.flags & IEEE80211_STA_PROBEREQ_POLL)) {
642 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
644 beaconint_us = ieee80211_tu_to_usec(
645 found->vif.bss_conf.beacon_int);
647 if (beaconint_us > latency) {
648 local->ps_sdata = NULL;
650 u8 dtimper = found->vif.bss_conf.dtim_period;
654 maxslp = min_t(int, dtimper,
655 latency / beaconint_us);
657 local->hw.conf.max_sleep_period = maxslp;
658 local->ps_sdata = found;
661 local->ps_sdata = NULL;
664 ieee80211_change_ps(local);
667 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
669 struct ieee80211_local *local =
670 container_of(work, struct ieee80211_local,
671 dynamic_ps_disable_work);
673 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
674 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
675 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
678 ieee80211_wake_queues_by_reason(&local->hw,
679 IEEE80211_QUEUE_STOP_REASON_PS);
682 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
684 struct ieee80211_local *local =
685 container_of(work, struct ieee80211_local,
686 dynamic_ps_enable_work);
687 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
689 /* can only happen when PS was just disabled anyway */
693 if (local->hw.conf.flags & IEEE80211_CONF_PS)
696 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
697 ieee80211_send_nullfunc(local, sdata, 1);
699 local->hw.conf.flags |= IEEE80211_CONF_PS;
700 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
703 void ieee80211_dynamic_ps_timer(unsigned long data)
705 struct ieee80211_local *local = (void *) data;
707 if (local->quiescing)
710 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
714 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
715 struct ieee80211_if_managed *ifmgd,
716 u8 *wmm_param, size_t wmm_param_len)
718 struct ieee80211_tx_queue_params params;
723 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
729 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
731 count = wmm_param[6] & 0x0f;
732 if (count == ifmgd->wmm_last_param_set)
734 ifmgd->wmm_last_param_set = count;
737 left = wmm_param_len - 8;
739 memset(¶ms, 0, sizeof(params));
742 for (; left >= 4; left -= 4, pos += 4) {
743 int aci = (pos[0] >> 5) & 0x03;
744 int acm = (pos[0] >> 4) & 0x01;
751 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
756 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
761 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
767 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
771 params.aifs = pos[0] & 0x0f;
772 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
773 params.cw_min = ecw2cw(pos[1] & 0x0f);
774 params.txop = get_unaligned_le16(pos + 2);
775 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
776 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
777 "cWmin=%d cWmax=%d txop=%d\n",
778 wiphy_name(local->hw.wiphy), queue, aci, acm,
779 params.aifs, params.cw_min, params.cw_max, params.txop);
781 if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx)
782 printk(KERN_DEBUG "%s: failed to set TX queue "
783 "parameters for queue %d\n",
784 wiphy_name(local->hw.wiphy), queue);
788 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
789 u16 capab, bool erp_valid, u8 erp)
791 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
792 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
793 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
797 bool use_short_preamble;
801 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
802 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
804 use_protection = false;
805 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
808 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
810 if (use_protection != bss_conf->use_cts_prot) {
811 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
812 if (net_ratelimit()) {
813 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
815 use_protection ? "enabled" : "disabled",
819 bss_conf->use_cts_prot = use_protection;
820 changed |= BSS_CHANGED_ERP_CTS_PROT;
823 if (use_short_preamble != bss_conf->use_short_preamble) {
824 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
825 if (net_ratelimit()) {
826 printk(KERN_DEBUG "%s: switched to %s barker preamble"
829 use_short_preamble ? "short" : "long",
833 bss_conf->use_short_preamble = use_short_preamble;
834 changed |= BSS_CHANGED_ERP_PREAMBLE;
837 if (use_short_slot != bss_conf->use_short_slot) {
838 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
839 if (net_ratelimit()) {
840 printk(KERN_DEBUG "%s: switched to %s slot time"
843 use_short_slot ? "short" : "long",
847 bss_conf->use_short_slot = use_short_slot;
848 changed |= BSS_CHANGED_ERP_SLOT;
854 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
855 u32 bss_info_changed)
857 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
858 struct ieee80211_local *local = sdata->local;
859 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
861 struct ieee80211_bss *bss;
863 bss_info_changed |= BSS_CHANGED_ASSOC;
864 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
866 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
867 conf->channel->center_freq,
868 ifmgd->ssid, ifmgd->ssid_len);
870 /* set timing information */
871 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
872 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
873 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
875 bss_info_changed |= BSS_CHANGED_BEACON_INT;
876 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
877 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
879 cfg80211_hold_bss(&bss->cbss);
881 ieee80211_rx_bss_put(local, bss);
884 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
885 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
887 ifmgd->last_probe = jiffies;
888 ieee80211_led_assoc(local, 1);
890 sdata->vif.bss_conf.assoc = 1;
892 * For now just always ask the driver to update the basic rateset
893 * when we have associated, we aren't checking whether it actually
896 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
898 /* And the BSSID changed - we're associated now */
899 bss_info_changed |= BSS_CHANGED_BSSID;
901 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
903 /* will be same as sdata */
904 if (local->ps_sdata) {
905 mutex_lock(&local->iflist_mtx);
906 ieee80211_recalc_ps(local, -1);
907 mutex_unlock(&local->iflist_mtx);
910 netif_tx_start_all_queues(sdata->dev);
911 netif_carrier_on(sdata->dev);
914 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
916 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
917 struct ieee80211_local *local = sdata->local;
919 ifmgd->direct_probe_tries++;
920 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
921 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
922 sdata->dev->name, ifmgd->bssid);
923 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
924 ieee80211_recalc_idle(local);
925 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid,
929 * Most likely AP is not in the range so remove the
930 * bss information associated to the AP
932 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
933 sdata->local->hw.conf.channel->center_freq,
934 ifmgd->ssid, ifmgd->ssid_len);
937 * We might have a pending scan which had no chance to run yet
938 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
939 * Hence, queue the STAs work again
941 queue_work(local->hw.workqueue, &ifmgd->work);
945 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
946 sdata->dev->name, ifmgd->bssid,
947 ifmgd->direct_probe_tries);
949 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
951 /* Direct probe is sent to broadcast address as some APs
952 * will not answer to direct packet in unassociated state.
954 ieee80211_send_probe_req(sdata, NULL,
955 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
957 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
961 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
963 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
964 struct ieee80211_local *local = sdata->local;
967 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
968 printk(KERN_DEBUG "%s: authentication with AP %pM"
970 sdata->dev->name, ifmgd->bssid);
971 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
972 ieee80211_recalc_idle(local);
973 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid,
975 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
976 sdata->local->hw.conf.channel->center_freq,
977 ifmgd->ssid, ifmgd->ssid_len);
980 * We might have a pending scan which had no chance to run yet
981 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
982 * Hence, queue the STAs work again
984 queue_work(local->hw.workqueue, &ifmgd->work);
988 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
989 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
990 sdata->dev->name, ifmgd->bssid);
992 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ifmgd->sme_auth_ie,
993 ifmgd->sme_auth_ie_len, ifmgd->bssid, 0);
994 ifmgd->auth_transaction = 2;
996 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
1000 * The disassoc 'reason' argument can be either our own reason
1001 * if self disconnected or a reason code from the AP.
1003 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1004 bool deauth, bool self_disconnected,
1007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1008 struct ieee80211_local *local = sdata->local;
1009 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
1010 struct ieee80211_bss *bss;
1011 struct sta_info *sta;
1012 u32 changed = 0, config_changed = 0;
1015 ifmgd->direct_probe_tries = 0;
1016 ifmgd->auth_tries = 0;
1018 ifmgd->assoc_scan_tries = 0;
1019 ifmgd->assoc_tries = 0;
1021 netif_tx_stop_all_queues(sdata->dev);
1022 netif_carrier_off(sdata->dev);
1025 sta = sta_info_get(local, ifmgd->bssid);
1027 ieee80211_sta_tear_down_BA_sessions(sta);
1030 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1031 conf->channel->center_freq,
1032 ifmgd->ssid, ifmgd->ssid_len);
1035 cfg80211_unhold_bss(&bss->cbss);
1036 ieee80211_rx_bss_put(local, bss);
1039 if (self_disconnected) {
1041 ieee80211_send_deauth_disassoc(sdata,
1042 IEEE80211_STYPE_DEAUTH, reason);
1044 ieee80211_send_deauth_disassoc(sdata,
1045 IEEE80211_STYPE_DISASSOC, reason);
1048 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1049 changed |= ieee80211_reset_erp_info(sdata);
1051 ieee80211_led_assoc(local, 0);
1052 changed |= BSS_CHANGED_ASSOC;
1053 sdata->vif.bss_conf.assoc = false;
1055 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1056 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1057 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1058 sdata->local->hw.conf.channel->center_freq,
1059 ifmgd->ssid, ifmgd->ssid_len);
1062 ieee80211_set_wmm_default(sdata);
1064 ieee80211_recalc_idle(local);
1066 /* channel(_type) changes are handled by ieee80211_hw_config */
1067 local->oper_channel_type = NL80211_CHAN_NO_HT;
1069 /* on the next assoc, re-program HT parameters */
1070 sdata->ht_opmode_valid = false;
1072 local->power_constr_level = 0;
1074 del_timer_sync(&local->dynamic_ps_timer);
1075 cancel_work_sync(&local->dynamic_ps_enable_work);
1077 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1078 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1079 config_changed |= IEEE80211_CONF_CHANGE_PS;
1082 ieee80211_hw_config(local, config_changed);
1084 /* And the BSSID changed -- not very interesting here */
1085 changed |= BSS_CHANGED_BSSID;
1086 ieee80211_bss_info_change_notify(sdata, changed);
1090 sta = sta_info_get(local, ifmgd->bssid);
1096 sta_info_unlink(&sta);
1100 sta_info_destroy(sta);
1103 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1105 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1106 struct ieee80211_local *local = sdata->local;
1108 ifmgd->assoc_tries++;
1109 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1110 printk(KERN_DEBUG "%s: association with AP %pM"
1112 sdata->dev->name, ifmgd->bssid);
1113 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1114 ieee80211_recalc_idle(local);
1115 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid,
1117 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1118 sdata->local->hw.conf.channel->center_freq,
1119 ifmgd->ssid, ifmgd->ssid_len);
1121 * We might have a pending scan which had no chance to run yet
1122 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1123 * Hence, queue the STAs work again
1125 queue_work(local->hw.workqueue, &ifmgd->work);
1129 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1130 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1131 sdata->dev->name, ifmgd->bssid);
1132 ieee80211_send_assoc(sdata);
1134 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1137 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1138 struct ieee80211_hdr *hdr)
1141 * We can postpone the mgd.timer whenever receiving unicast frames
1142 * from AP because we know that the connection is working both ways
1143 * at that time. But multicast frames (and hence also beacons) must
1144 * be ignored here, because we need to trigger the timer during
1145 * data idle periods for sending the periodical probe request to
1148 if (!is_multicast_ether_addr(hdr->addr1))
1149 mod_timer(&sdata->u.mgd.timer,
1150 jiffies + IEEE80211_MONITORING_INTERVAL);
1153 void ieee80211_beacon_loss_work(struct work_struct *work)
1155 struct ieee80211_sub_if_data *sdata =
1156 container_of(work, struct ieee80211_sub_if_data,
1157 u.mgd.beacon_loss_work);
1158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1161 * The driver has already reported this event and we have
1162 * already sent a probe request. Maybe the AP died and the
1163 * driver keeps reporting until we disassociate... We have
1164 * to ignore that because otherwise we would continually
1165 * reset the timer and never check whether we received a
1168 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1171 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1172 if (net_ratelimit()) {
1173 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1174 "- sending probe request\n", sdata->dev->name,
1175 sdata->u.mgd.bssid);
1179 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1181 mutex_lock(&sdata->local->iflist_mtx);
1182 ieee80211_recalc_ps(sdata->local, -1);
1183 mutex_unlock(&sdata->local->iflist_mtx);
1185 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1186 ifmgd->ssid_len, NULL, 0);
1188 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1191 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1193 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1195 queue_work(sdata->local->hw.workqueue,
1196 &sdata->u.mgd.beacon_loss_work);
1198 EXPORT_SYMBOL(ieee80211_beacon_loss);
1200 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1203 struct ieee80211_local *local = sdata->local;
1204 struct sta_info *sta;
1205 unsigned long last_rx;
1206 bool disassoc = false;
1208 /* TODO: start monitoring current AP signal quality and number of
1209 * missed beacons. Scan other channels every now and then and search
1210 * for better APs. */
1211 /* TODO: remove expired BSSes */
1213 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1217 sta = sta_info_get(local, ifmgd->bssid);
1219 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1220 sdata->dev->name, ifmgd->bssid);
1226 last_rx = sta->last_rx;
1229 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1230 time_after(jiffies, last_rx + IEEE80211_PROBE_WAIT)) {
1231 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1232 "- disassociating\n",
1233 sdata->dev->name, ifmgd->bssid);
1235 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1240 * Beacon filtering is only enabled with power save and then the
1241 * stack should not check for beacon loss.
1243 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1244 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1246 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1247 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1248 if (net_ratelimit()) {
1249 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1250 "- sending probe request\n",
1251 sdata->dev->name, ifmgd->bssid);
1254 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1255 mutex_lock(&local->iflist_mtx);
1256 ieee80211_recalc_ps(local, -1);
1257 mutex_unlock(&local->iflist_mtx);
1258 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1259 ifmgd->ssid_len, NULL, 0);
1260 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1264 if (time_after(jiffies, last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1265 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1266 mutex_lock(&local->iflist_mtx);
1267 ieee80211_recalc_ps(local, -1);
1268 mutex_unlock(&local->iflist_mtx);
1269 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1270 ifmgd->ssid_len, NULL, 0);
1275 mod_timer(&ifmgd->timer,
1276 jiffies + IEEE80211_MONITORING_INTERVAL);
1278 ieee80211_set_disassoc(sdata, true, true,
1279 WLAN_REASON_PREV_AUTH_NOT_VALID);
1283 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1287 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1288 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1289 /* Wait for SME to request association */
1290 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1291 ieee80211_recalc_idle(sdata->local);
1295 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1296 struct ieee80211_mgmt *mgmt,
1300 struct ieee802_11_elems elems;
1302 pos = mgmt->u.auth.variable;
1303 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1304 if (!elems.challenge)
1306 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1307 elems.challenge - 2, elems.challenge_len + 2,
1308 sdata->u.mgd.bssid, 1);
1309 sdata->u.mgd.auth_transaction = 4;
1312 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1313 struct ieee80211_mgmt *mgmt,
1316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1317 u16 auth_alg, auth_transaction, status_code;
1319 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1325 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1328 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1331 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1332 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1333 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1335 if (auth_alg != ifmgd->auth_alg ||
1336 auth_transaction != ifmgd->auth_transaction)
1339 if (status_code != WLAN_STATUS_SUCCESS) {
1340 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len,
1342 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1343 ieee80211_recalc_idle(sdata->local);
1347 switch (ifmgd->auth_alg) {
1348 case WLAN_AUTH_OPEN:
1349 case WLAN_AUTH_LEAP:
1351 ieee80211_auth_completed(sdata);
1352 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len,
1355 case WLAN_AUTH_SHARED_KEY:
1356 if (ifmgd->auth_transaction == 4) {
1357 ieee80211_auth_completed(sdata);
1358 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len,
1361 ieee80211_auth_challenge(sdata, mgmt, len);
1367 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1368 struct ieee80211_mgmt *mgmt,
1371 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1377 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1380 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1382 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1383 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1384 sdata->dev->name, reason_code);
1386 ieee80211_set_disassoc(sdata, true, false, 0);
1387 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1388 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL);
1392 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1393 struct ieee80211_mgmt *mgmt,
1396 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1402 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1405 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1407 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1408 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1409 sdata->dev->name, reason_code);
1411 ieee80211_set_disassoc(sdata, false, false, reason_code);
1412 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL);
1416 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1417 struct ieee80211_mgmt *mgmt,
1421 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1422 struct ieee80211_local *local = sdata->local;
1423 struct ieee80211_supported_band *sband;
1424 struct sta_info *sta;
1425 u32 rates, basic_rates;
1426 u16 capab_info, status_code, aid;
1427 struct ieee802_11_elems elems;
1428 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1432 bool have_higher_than_11mbit = false, newsta = false;
1433 u16 ap_ht_cap_flags;
1435 /* AssocResp and ReassocResp have identical structure, so process both
1436 * of them in this function. */
1438 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1444 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1447 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1448 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1449 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1451 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1452 "status=%d aid=%d)\n",
1453 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1454 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1456 pos = mgmt->u.assoc_resp.variable;
1457 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1459 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1460 elems.timeout_int && elems.timeout_int_len == 5 &&
1461 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1463 tu = get_unaligned_le32(elems.timeout_int + 1);
1464 ms = tu * 1024 / 1000;
1465 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1466 "comeback duration %u TU (%u ms)\n",
1467 sdata->dev->name, tu, ms);
1468 if (ms > IEEE80211_ASSOC_TIMEOUT)
1469 mod_timer(&ifmgd->timer,
1470 jiffies + msecs_to_jiffies(ms));
1474 if (status_code != WLAN_STATUS_SUCCESS) {
1475 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1476 sdata->dev->name, status_code);
1477 /* if this was a reassociation, ensure we try a "full"
1478 * association next time. This works around some broken APs
1479 * which do not correctly reject reassociation requests. */
1480 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1481 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len,
1483 /* Wait for SME to decide what to do next */
1484 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1485 ieee80211_recalc_idle(local);
1489 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1490 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1491 "set\n", sdata->dev->name, aid);
1492 aid &= ~(BIT(15) | BIT(14));
1494 if (!elems.supp_rates) {
1495 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1500 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1502 ifmgd->ap_capab = capab_info;
1504 kfree(ifmgd->assocresp_ies);
1505 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1506 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1507 if (ifmgd->assocresp_ies)
1508 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1512 /* Add STA entry for the AP */
1513 sta = sta_info_get(local, ifmgd->bssid);
1517 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1519 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1520 " the AP\n", sdata->dev->name);
1525 /* update new sta with its last rx activity */
1526 sta->last_rx = jiffies;
1530 * FIXME: Do we really need to update the sta_info's information here?
1531 * We already know about the AP (we found it in our list) so it
1532 * should already be filled with the right info, no?
1533 * As is stands, all this is racy because typically we assume
1534 * the information that is filled in here (except flags) doesn't
1535 * change while a STA structure is alive. As such, it should move
1536 * to between the sta_info_alloc() and sta_info_insert() above.
1539 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP);
1540 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1541 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1545 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1547 for (i = 0; i < elems.supp_rates_len; i++) {
1548 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1549 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1552 have_higher_than_11mbit = true;
1554 for (j = 0; j < sband->n_bitrates; j++) {
1555 if (sband->bitrates[j].bitrate == rate) {
1558 basic_rates |= BIT(j);
1564 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1565 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1566 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1569 have_higher_than_11mbit = true;
1571 for (j = 0; j < sband->n_bitrates; j++) {
1572 if (sband->bitrates[j].bitrate == rate) {
1575 basic_rates |= BIT(j);
1581 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1582 sdata->vif.bss_conf.basic_rates = basic_rates;
1584 /* cf. IEEE 802.11 9.2.12 */
1585 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1586 have_higher_than_11mbit)
1587 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1589 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1591 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1592 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1593 elems.ht_cap_elem, &sta->sta.ht_cap);
1595 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1597 rate_control_rate_init(sta);
1599 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1600 set_sta_flags(sta, WLAN_STA_MFP);
1602 if (elems.wmm_param)
1603 set_sta_flags(sta, WLAN_STA_WME);
1606 int err = sta_info_insert(sta);
1608 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1609 " the AP (error %d)\n", sdata->dev->name, err);
1617 if (elems.wmm_param)
1618 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1619 elems.wmm_param_len);
1621 ieee80211_set_wmm_default(sdata);
1623 if (elems.ht_info_elem && elems.wmm_param &&
1624 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1625 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1626 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1629 /* set AID and assoc capability,
1630 * ieee80211_set_associated() will tell the driver */
1631 bss_conf->aid = aid;
1632 bss_conf->assoc_capability = capab_info;
1633 ieee80211_set_associated(sdata, changed);
1636 * initialise the time of last beacon to be the association time,
1637 * otherwise beacon loss check will trigger immediately
1639 ifmgd->last_beacon = jiffies;
1641 ieee80211_associated(sdata);
1642 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL);
1646 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1647 struct ieee80211_mgmt *mgmt,
1649 struct ieee80211_rx_status *rx_status,
1650 struct ieee802_11_elems *elems,
1653 struct ieee80211_local *local = sdata->local;
1655 struct ieee80211_bss *bss;
1656 struct ieee80211_channel *channel;
1658 if (elems->ds_params && elems->ds_params_len == 1)
1659 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1661 freq = rx_status->freq;
1663 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1665 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1668 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1673 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1674 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1675 struct ieee80211_channel_sw_ie *sw_elem =
1676 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1677 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1680 ieee80211_rx_bss_put(local, bss);
1684 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1685 struct ieee80211_mgmt *mgmt,
1687 struct ieee80211_rx_status *rx_status)
1689 struct ieee80211_if_managed *ifmgd;
1691 struct ieee802_11_elems elems;
1693 ifmgd = &sdata->u.mgd;
1695 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1696 return; /* ignore ProbeResp to foreign address */
1698 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1702 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1705 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1707 /* direct probe may be part of the association flow */
1708 if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
1709 printk(KERN_DEBUG "%s direct probe responded\n",
1711 ieee80211_authenticate(sdata);
1714 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1715 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1716 mutex_lock(&sdata->local->iflist_mtx);
1717 ieee80211_recalc_ps(sdata->local, -1);
1718 mutex_unlock(&sdata->local->iflist_mtx);
1723 * This is the canonical list of information elements we care about,
1724 * the filter code also gives us all changes to the Microsoft OUI
1725 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1727 * We implement beacon filtering in software since that means we can
1728 * avoid processing the frame here and in cfg80211, and userspace
1729 * will not be able to tell whether the hardware supports it or not.
1731 * XXX: This list needs to be dynamic -- userspace needs to be able to
1732 * add items it requires. It also needs to be able to tell us to
1733 * look out for other vendor IEs.
1735 static const u64 care_about_ies =
1736 (1ULL << WLAN_EID_COUNTRY) |
1737 (1ULL << WLAN_EID_ERP_INFO) |
1738 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1739 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1740 (1ULL << WLAN_EID_HT_CAPABILITY) |
1741 (1ULL << WLAN_EID_HT_INFORMATION);
1743 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1744 struct ieee80211_mgmt *mgmt,
1746 struct ieee80211_rx_status *rx_status)
1748 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1750 struct ieee802_11_elems elems;
1751 struct ieee80211_local *local = sdata->local;
1753 bool erp_valid, directed_tim = false;
1757 /* Process beacon from the current BSS */
1758 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1762 if (rx_status->freq != local->hw.conf.channel->center_freq)
1765 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1766 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1769 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1770 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1771 if (net_ratelimit()) {
1772 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1773 "to a received beacon\n", sdata->dev->name);
1776 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1777 mutex_lock(&local->iflist_mtx);
1778 ieee80211_recalc_ps(local, -1);
1779 mutex_unlock(&local->iflist_mtx);
1782 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1783 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1784 len - baselen, &elems,
1785 care_about_ies, ncrc);
1787 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1788 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1791 if (ncrc != ifmgd->beacon_crc) {
1792 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1795 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1796 elems.wmm_param_len);
1799 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1801 if (local->hw.conf.dynamic_ps_timeout > 0) {
1802 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1803 ieee80211_hw_config(local,
1804 IEEE80211_CONF_CHANGE_PS);
1805 ieee80211_send_nullfunc(local, sdata, 0);
1807 local->pspolling = true;
1810 * Here is assumed that the driver will be
1811 * able to send ps-poll frame and receive a
1812 * response even though power save mode is
1813 * enabled, but some drivers might require
1814 * to disable power save here. This needs
1815 * to be investigated.
1817 ieee80211_send_pspoll(local, sdata);
1822 if (ncrc == ifmgd->beacon_crc)
1824 ifmgd->beacon_crc = ncrc;
1826 if (elems.erp_info && elems.erp_info_len >= 1) {
1828 erp_value = elems.erp_info[0];
1832 changed |= ieee80211_handle_bss_capability(sdata,
1833 le16_to_cpu(mgmt->u.beacon.capab_info),
1834 erp_valid, erp_value);
1837 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1838 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1839 struct sta_info *sta;
1840 struct ieee80211_supported_band *sband;
1841 u16 ap_ht_cap_flags;
1845 sta = sta_info_get(local, ifmgd->bssid);
1851 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1853 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1854 elems.ht_cap_elem, &sta->sta.ht_cap);
1856 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1860 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1864 if (elems.country_elem) {
1865 /* Note we are only reviewing this on beacons
1866 * for the BSSID we are associated to */
1867 regulatory_hint_11d(local->hw.wiphy,
1868 elems.country_elem, elems.country_elem_len);
1870 /* TODO: IBSS also needs this */
1871 if (elems.pwr_constr_elem)
1872 ieee80211_handle_pwr_constr(sdata,
1873 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1874 elems.pwr_constr_elem,
1875 elems.pwr_constr_elem_len);
1878 ieee80211_bss_info_change_notify(sdata, changed);
1881 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1882 struct sk_buff *skb)
1884 struct ieee80211_local *local = sdata->local;
1885 struct ieee80211_mgmt *mgmt;
1889 return RX_DROP_MONITOR;
1891 mgmt = (struct ieee80211_mgmt *) skb->data;
1892 fc = le16_to_cpu(mgmt->frame_control);
1894 switch (fc & IEEE80211_FCTL_STYPE) {
1895 case IEEE80211_STYPE_PROBE_REQ:
1896 case IEEE80211_STYPE_PROBE_RESP:
1897 case IEEE80211_STYPE_BEACON:
1898 case IEEE80211_STYPE_AUTH:
1899 case IEEE80211_STYPE_ASSOC_RESP:
1900 case IEEE80211_STYPE_REASSOC_RESP:
1901 case IEEE80211_STYPE_DEAUTH:
1902 case IEEE80211_STYPE_DISASSOC:
1903 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1904 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1908 return RX_DROP_MONITOR;
1911 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1912 struct sk_buff *skb)
1914 struct ieee80211_rx_status *rx_status;
1915 struct ieee80211_mgmt *mgmt;
1918 rx_status = (struct ieee80211_rx_status *) skb->cb;
1919 mgmt = (struct ieee80211_mgmt *) skb->data;
1920 fc = le16_to_cpu(mgmt->frame_control);
1922 switch (fc & IEEE80211_FCTL_STYPE) {
1923 case IEEE80211_STYPE_PROBE_RESP:
1924 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1927 case IEEE80211_STYPE_BEACON:
1928 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1931 case IEEE80211_STYPE_AUTH:
1932 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1934 case IEEE80211_STYPE_ASSOC_RESP:
1935 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1937 case IEEE80211_STYPE_REASSOC_RESP:
1938 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1940 case IEEE80211_STYPE_DEAUTH:
1941 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1943 case IEEE80211_STYPE_DISASSOC:
1944 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1951 static void ieee80211_sta_timer(unsigned long data)
1953 struct ieee80211_sub_if_data *sdata =
1954 (struct ieee80211_sub_if_data *) data;
1955 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1956 struct ieee80211_local *local = sdata->local;
1958 if (local->quiescing) {
1959 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1963 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1964 queue_work(local->hw.workqueue, &ifmgd->work);
1967 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1969 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1970 struct ieee80211_local *local = sdata->local;
1972 /* Reset own TSF to allow time synchronization work. */
1973 drv_reset_tsf(local);
1975 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1976 ifmgd->auth_transaction = -1;
1977 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1978 ifmgd->assoc_scan_tries = 0;
1979 ifmgd->direct_probe_tries = 0;
1980 ifmgd->auth_tries = 0;
1981 ifmgd->assoc_tries = 0;
1982 netif_tx_stop_all_queues(sdata->dev);
1983 netif_carrier_off(sdata->dev);
1986 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1988 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1989 struct ieee80211_local *local = sdata->local;
1990 struct ieee80211_bss *bss;
1991 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1992 u8 ssid_len = ifmgd->ssid_len;
1993 u16 capa_mask = WLAN_CAPABILITY_ESS;
1994 u16 capa_val = WLAN_CAPABILITY_ESS;
1995 struct ieee80211_channel *chan = local->oper_channel;
1997 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1998 bssid, ssid, ssid_len,
1999 capa_mask, capa_val);
2002 local->oper_channel = bss->cbss.channel;
2003 local->oper_channel_type = NL80211_CHAN_NO_HT;
2004 ieee80211_hw_config(local, 0);
2006 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2008 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2009 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2011 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2013 /* Send out direct probe if no probe resp was received or
2014 * the one we have is outdated
2016 if (!bss->last_probe_resp ||
2017 time_after(jiffies, bss->last_probe_resp
2018 + IEEE80211_SCAN_RESULT_EXPIRE))
2019 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2021 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2023 ieee80211_rx_bss_put(local, bss);
2024 ieee80211_sta_reset_auth(sdata);
2027 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2029 ifmgd->assoc_scan_tries++;
2031 ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2034 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2035 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2037 ifmgd->assoc_scan_tries = 0;
2038 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2039 ieee80211_recalc_idle(local);
2046 static void ieee80211_sta_work(struct work_struct *work)
2048 struct ieee80211_sub_if_data *sdata =
2049 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2050 struct ieee80211_local *local = sdata->local;
2051 struct ieee80211_if_managed *ifmgd;
2052 struct sk_buff *skb;
2054 if (!netif_running(sdata->dev))
2057 if (local->sw_scanning || local->hw_scanning)
2060 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2064 * Nothing should have been stuffed into the workqueue during
2065 * the suspend->resume cycle. If this WARN is seen then there
2066 * is a bug with either the driver suspend or something in
2067 * mac80211 stuffing into the workqueue which we haven't yet
2068 * cleared during mac80211's suspend cycle.
2070 if (WARN_ON(local->suspended))
2073 ifmgd = &sdata->u.mgd;
2075 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2076 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2078 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2079 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2080 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2081 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2082 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2083 round_jiffies_relative(0));
2087 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2088 if (ieee80211_sta_config_auth(sdata))
2090 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2091 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2094 ieee80211_recalc_idle(local);
2096 switch (ifmgd->state) {
2097 case IEEE80211_STA_MLME_DISABLED:
2099 case IEEE80211_STA_MLME_DIRECT_PROBE:
2100 ieee80211_direct_probe(sdata);
2102 case IEEE80211_STA_MLME_AUTHENTICATE:
2103 ieee80211_authenticate(sdata);
2105 case IEEE80211_STA_MLME_ASSOCIATE:
2106 ieee80211_associate(sdata);
2108 case IEEE80211_STA_MLME_ASSOCIATED:
2109 ieee80211_associated(sdata);
2117 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2119 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2121 * Need to update last_beacon to avoid beacon loss
2124 sdata->u.mgd.last_beacon = jiffies;
2127 queue_work(sdata->local->hw.workqueue,
2128 &sdata->u.mgd.work);
2133 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2135 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2138 * we need to use atomic bitops for the running bits
2139 * only because both timers might fire at the same
2140 * time -- the code here is properly synchronised.
2143 cancel_work_sync(&ifmgd->work);
2144 cancel_work_sync(&ifmgd->beacon_loss_work);
2145 if (del_timer_sync(&ifmgd->timer))
2146 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2148 cancel_work_sync(&ifmgd->chswitch_work);
2149 if (del_timer_sync(&ifmgd->chswitch_timer))
2150 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2153 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2157 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2158 add_timer(&ifmgd->timer);
2159 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2160 add_timer(&ifmgd->chswitch_timer);
2164 /* interface setup */
2165 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2167 struct ieee80211_if_managed *ifmgd;
2170 ifmgd = &sdata->u.mgd;
2171 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2172 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2173 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2174 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2175 (unsigned long) sdata);
2176 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2177 (unsigned long) sdata);
2178 skb_queue_head_init(&ifmgd->skb_queue);
2180 ifmgd->capab = WLAN_CAPABILITY_ESS;
2182 if (sdata->local->hw.queues >= 4)
2183 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2185 hw_flags = sdata->local->hw.flags;
2188 /* configuration hooks */
2189 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2191 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2192 struct ieee80211_local *local = sdata->local;
2194 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2197 if (WARN_ON(ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED))
2198 ieee80211_set_disassoc(sdata, true, true,
2199 WLAN_REASON_DEAUTH_LEAVING);
2201 if (WARN_ON(ifmgd->ssid_len == 0)) {
2203 * Only allow association to be started if a valid SSID
2209 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2210 queue_work(local->hw.workqueue, &ifmgd->work);
2213 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2214 const char *ie, size_t len)
2216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2218 if (len == 0 && ifmgd->extra_ie_len == 0)
2221 if (len == ifmgd->extra_ie_len && ifmgd->extra_ie &&
2222 memcmp(ifmgd->extra_ie, ie, len) == 0)
2225 kfree(ifmgd->extra_ie);
2227 ifmgd->extra_ie = NULL;
2228 ifmgd->extra_ie_len = 0;
2231 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2232 if (!ifmgd->extra_ie) {
2233 ifmgd->extra_ie_len = 0;
2236 memcpy(ifmgd->extra_ie, ie, len);
2237 ifmgd->extra_ie_len = len;
2241 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2243 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2244 sdata->dev->name, reason);
2246 ieee80211_set_disassoc(sdata, true, true, reason);
2250 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2252 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2254 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2255 sdata->dev->name, reason);
2257 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2260 ieee80211_set_disassoc(sdata, false, true, reason);
2264 /* scan finished notification */
2265 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2267 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2269 /* Restart STA timers */
2271 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2272 ieee80211_restart_sta_timer(sdata);
2276 int ieee80211_max_network_latency(struct notifier_block *nb,
2277 unsigned long data, void *dummy)
2279 s32 latency_usec = (s32) data;
2280 struct ieee80211_local *local =
2281 container_of(nb, struct ieee80211_local,
2282 network_latency_notifier);
2284 mutex_lock(&local->iflist_mtx);
2285 ieee80211_recalc_ps(local, latency_usec);
2286 mutex_unlock(&local->iflist_mtx);