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 ieee80211_rx_bss_put(local, bss);
882 ifmgd->last_probe = jiffies;
883 ieee80211_led_assoc(local, 1);
885 sdata->vif.bss_conf.assoc = 1;
887 * For now just always ask the driver to update the basic rateset
888 * when we have associated, we aren't checking whether it actually
891 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
893 /* And the BSSID changed - we're associated now */
894 bss_info_changed |= BSS_CHANGED_BSSID;
896 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
898 /* will be same as sdata */
899 if (local->ps_sdata) {
900 mutex_lock(&local->iflist_mtx);
901 ieee80211_recalc_ps(local, -1);
902 mutex_unlock(&local->iflist_mtx);
905 netif_tx_start_all_queues(sdata->dev);
906 netif_carrier_on(sdata->dev);
909 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
911 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
912 struct ieee80211_local *local = sdata->local;
914 ifmgd->direct_probe_tries++;
915 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
916 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
917 sdata->dev->name, ifmgd->bssid);
918 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
919 ieee80211_recalc_idle(local);
920 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid,
924 * Most likely AP is not in the range so remove the
925 * bss information associated to the AP
927 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
928 sdata->local->hw.conf.channel->center_freq,
929 ifmgd->ssid, ifmgd->ssid_len);
932 * We might have a pending scan which had no chance to run yet
933 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
934 * Hence, queue the STAs work again
936 queue_work(local->hw.workqueue, &ifmgd->work);
940 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
941 sdata->dev->name, ifmgd->bssid,
942 ifmgd->direct_probe_tries);
944 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
946 /* Direct probe is sent to broadcast address as some APs
947 * will not answer to direct packet in unassociated state.
949 ieee80211_send_probe_req(sdata, NULL,
950 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
952 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
956 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
958 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
959 struct ieee80211_local *local = sdata->local;
962 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
963 printk(KERN_DEBUG "%s: authentication with AP %pM"
965 sdata->dev->name, ifmgd->bssid);
966 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
967 ieee80211_recalc_idle(local);
968 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid,
970 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
971 sdata->local->hw.conf.channel->center_freq,
972 ifmgd->ssid, ifmgd->ssid_len);
975 * We might have a pending scan which had no chance to run yet
976 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
977 * Hence, queue the STAs work again
979 queue_work(local->hw.workqueue, &ifmgd->work);
983 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
984 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
985 sdata->dev->name, ifmgd->bssid);
987 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ifmgd->sme_auth_ie,
988 ifmgd->sme_auth_ie_len, ifmgd->bssid, 0);
989 ifmgd->auth_transaction = 2;
991 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
995 * The disassoc 'reason' argument can be either our own reason
996 * if self disconnected or a reason code from the AP.
998 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
999 bool deauth, bool self_disconnected,
1002 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1003 struct ieee80211_local *local = sdata->local;
1004 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
1005 struct ieee80211_bss *bss;
1006 struct sta_info *sta;
1007 u32 changed = 0, config_changed = 0;
1010 ifmgd->direct_probe_tries = 0;
1011 ifmgd->auth_tries = 0;
1013 ifmgd->assoc_scan_tries = 0;
1014 ifmgd->assoc_tries = 0;
1016 netif_tx_stop_all_queues(sdata->dev);
1017 netif_carrier_off(sdata->dev);
1020 sta = sta_info_get(local, ifmgd->bssid);
1022 ieee80211_sta_tear_down_BA_sessions(sta);
1025 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1026 conf->channel->center_freq,
1027 ifmgd->ssid, ifmgd->ssid_len);
1030 ieee80211_rx_bss_put(local, bss);
1032 if (self_disconnected) {
1034 ieee80211_send_deauth_disassoc(sdata,
1035 IEEE80211_STYPE_DEAUTH, reason);
1037 ieee80211_send_deauth_disassoc(sdata,
1038 IEEE80211_STYPE_DISASSOC, reason);
1041 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1042 changed |= ieee80211_reset_erp_info(sdata);
1044 ieee80211_led_assoc(local, 0);
1045 changed |= BSS_CHANGED_ASSOC;
1046 sdata->vif.bss_conf.assoc = false;
1048 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1049 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1050 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1051 sdata->local->hw.conf.channel->center_freq,
1052 ifmgd->ssid, ifmgd->ssid_len);
1055 ieee80211_set_wmm_default(sdata);
1057 ieee80211_recalc_idle(local);
1059 /* channel(_type) changes are handled by ieee80211_hw_config */
1060 local->oper_channel_type = NL80211_CHAN_NO_HT;
1062 /* on the next assoc, re-program HT parameters */
1063 sdata->ht_opmode_valid = false;
1065 local->power_constr_level = 0;
1067 del_timer_sync(&local->dynamic_ps_timer);
1068 cancel_work_sync(&local->dynamic_ps_enable_work);
1070 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1071 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1072 config_changed |= IEEE80211_CONF_CHANGE_PS;
1075 ieee80211_hw_config(local, config_changed);
1077 /* And the BSSID changed -- not very interesting here */
1078 changed |= BSS_CHANGED_BSSID;
1079 ieee80211_bss_info_change_notify(sdata, changed);
1083 sta = sta_info_get(local, ifmgd->bssid);
1089 sta_info_unlink(&sta);
1093 sta_info_destroy(sta);
1096 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1098 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1099 struct ieee80211_local *local = sdata->local;
1101 ifmgd->assoc_tries++;
1102 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1103 printk(KERN_DEBUG "%s: association with AP %pM"
1105 sdata->dev->name, ifmgd->bssid);
1106 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1107 ieee80211_recalc_idle(local);
1108 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid,
1110 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1111 sdata->local->hw.conf.channel->center_freq,
1112 ifmgd->ssid, ifmgd->ssid_len);
1114 * We might have a pending scan which had no chance to run yet
1115 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1116 * Hence, queue the STAs work again
1118 queue_work(local->hw.workqueue, &ifmgd->work);
1122 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1123 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1124 sdata->dev->name, ifmgd->bssid);
1125 ieee80211_send_assoc(sdata);
1127 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1130 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1131 struct ieee80211_hdr *hdr)
1134 * We can postpone the mgd.timer whenever receiving unicast frames
1135 * from AP because we know that the connection is working both ways
1136 * at that time. But multicast frames (and hence also beacons) must
1137 * be ignored here, because we need to trigger the timer during
1138 * data idle periods for sending the periodical probe request to
1141 if (!is_multicast_ether_addr(hdr->addr1))
1142 mod_timer(&sdata->u.mgd.timer,
1143 jiffies + IEEE80211_MONITORING_INTERVAL);
1146 void ieee80211_beacon_loss_work(struct work_struct *work)
1148 struct ieee80211_sub_if_data *sdata =
1149 container_of(work, struct ieee80211_sub_if_data,
1150 u.mgd.beacon_loss_work);
1151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1154 * The driver has already reported this event and we have
1155 * already sent a probe request. Maybe the AP died and the
1156 * driver keeps reporting until we disassociate... We have
1157 * to ignore that because otherwise we would continually
1158 * reset the timer and never check whether we received a
1161 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1164 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1165 if (net_ratelimit()) {
1166 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1167 "- sending probe request\n", sdata->dev->name,
1168 sdata->u.mgd.bssid);
1172 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1174 mutex_lock(&sdata->local->iflist_mtx);
1175 ieee80211_recalc_ps(sdata->local, -1);
1176 mutex_unlock(&sdata->local->iflist_mtx);
1178 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1179 ifmgd->ssid_len, NULL, 0);
1181 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1184 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1186 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1188 queue_work(sdata->local->hw.workqueue,
1189 &sdata->u.mgd.beacon_loss_work);
1191 EXPORT_SYMBOL(ieee80211_beacon_loss);
1193 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1195 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1196 struct ieee80211_local *local = sdata->local;
1197 struct sta_info *sta;
1198 unsigned long last_rx;
1199 bool disassoc = false;
1201 /* TODO: start monitoring current AP signal quality and number of
1202 * missed beacons. Scan other channels every now and then and search
1203 * for better APs. */
1204 /* TODO: remove expired BSSes */
1206 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1210 sta = sta_info_get(local, ifmgd->bssid);
1212 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1213 sdata->dev->name, ifmgd->bssid);
1219 last_rx = sta->last_rx;
1222 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1223 time_after(jiffies, last_rx + IEEE80211_PROBE_WAIT)) {
1224 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1225 "- disassociating\n",
1226 sdata->dev->name, ifmgd->bssid);
1228 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1233 * Beacon filtering is only enabled with power save and then the
1234 * stack should not check for beacon loss.
1236 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1237 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1239 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1240 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1241 if (net_ratelimit()) {
1242 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1243 "- sending probe request\n",
1244 sdata->dev->name, ifmgd->bssid);
1247 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1248 mutex_lock(&local->iflist_mtx);
1249 ieee80211_recalc_ps(local, -1);
1250 mutex_unlock(&local->iflist_mtx);
1251 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1252 ifmgd->ssid_len, NULL, 0);
1253 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1257 if (time_after(jiffies, last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1258 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1259 mutex_lock(&local->iflist_mtx);
1260 ieee80211_recalc_ps(local, -1);
1261 mutex_unlock(&local->iflist_mtx);
1262 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1263 ifmgd->ssid_len, NULL, 0);
1268 mod_timer(&ifmgd->timer,
1269 jiffies + IEEE80211_MONITORING_INTERVAL);
1271 ieee80211_set_disassoc(sdata, true, true,
1272 WLAN_REASON_PREV_AUTH_NOT_VALID);
1276 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1278 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1280 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1281 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1282 /* Wait for SME to request association */
1283 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1284 ieee80211_recalc_idle(sdata->local);
1288 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1289 struct ieee80211_mgmt *mgmt,
1293 struct ieee802_11_elems elems;
1295 pos = mgmt->u.auth.variable;
1296 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1297 if (!elems.challenge)
1299 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1300 elems.challenge - 2, elems.challenge_len + 2,
1301 sdata->u.mgd.bssid, 1);
1302 sdata->u.mgd.auth_transaction = 4;
1305 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1306 struct ieee80211_mgmt *mgmt,
1309 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1310 u16 auth_alg, auth_transaction, status_code;
1312 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1318 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1321 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1324 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1325 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1326 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1328 if (auth_alg != ifmgd->auth_alg ||
1329 auth_transaction != ifmgd->auth_transaction)
1332 if (status_code != WLAN_STATUS_SUCCESS) {
1333 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len,
1335 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1336 ieee80211_recalc_idle(sdata->local);
1340 switch (ifmgd->auth_alg) {
1341 case WLAN_AUTH_OPEN:
1342 case WLAN_AUTH_LEAP:
1344 ieee80211_auth_completed(sdata);
1345 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len,
1348 case WLAN_AUTH_SHARED_KEY:
1349 if (ifmgd->auth_transaction == 4) {
1350 ieee80211_auth_completed(sdata);
1351 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len,
1354 ieee80211_auth_challenge(sdata, mgmt, len);
1360 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1361 struct ieee80211_mgmt *mgmt,
1364 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1370 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1373 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1375 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1376 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1377 sdata->dev->name, reason_code);
1379 ieee80211_set_disassoc(sdata, true, false, 0);
1380 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1381 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL);
1385 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1386 struct ieee80211_mgmt *mgmt,
1389 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1395 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1398 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1400 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1401 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1402 sdata->dev->name, reason_code);
1404 ieee80211_set_disassoc(sdata, false, false, reason_code);
1405 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL);
1409 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1410 struct ieee80211_mgmt *mgmt,
1414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1415 struct ieee80211_local *local = sdata->local;
1416 struct ieee80211_supported_band *sband;
1417 struct sta_info *sta;
1418 u32 rates, basic_rates;
1419 u16 capab_info, status_code, aid;
1420 struct ieee802_11_elems elems;
1421 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1425 bool have_higher_than_11mbit = false, newsta = false;
1426 u16 ap_ht_cap_flags;
1428 /* AssocResp and ReassocResp have identical structure, so process both
1429 * of them in this function. */
1431 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1437 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1440 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1441 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1442 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1444 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1445 "status=%d aid=%d)\n",
1446 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1447 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1449 pos = mgmt->u.assoc_resp.variable;
1450 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1452 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1453 elems.timeout_int && elems.timeout_int_len == 5 &&
1454 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1456 tu = get_unaligned_le32(elems.timeout_int + 1);
1457 ms = tu * 1024 / 1000;
1458 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1459 "comeback duration %u TU (%u ms)\n",
1460 sdata->dev->name, tu, ms);
1461 if (ms > IEEE80211_ASSOC_TIMEOUT)
1462 mod_timer(&ifmgd->timer,
1463 jiffies + msecs_to_jiffies(ms));
1467 if (status_code != WLAN_STATUS_SUCCESS) {
1468 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1469 sdata->dev->name, status_code);
1470 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len,
1472 /* Wait for SME to decide what to do next */
1473 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1474 ieee80211_recalc_idle(local);
1478 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1479 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1480 "set\n", sdata->dev->name, aid);
1481 aid &= ~(BIT(15) | BIT(14));
1483 if (!elems.supp_rates) {
1484 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1489 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1491 ifmgd->ap_capab = capab_info;
1493 kfree(ifmgd->assocresp_ies);
1494 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1495 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1496 if (ifmgd->assocresp_ies)
1497 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1501 /* Add STA entry for the AP */
1502 sta = sta_info_get(local, ifmgd->bssid);
1506 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1508 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1509 " the AP\n", sdata->dev->name);
1514 /* update new sta with its last rx activity */
1515 sta->last_rx = jiffies;
1519 * FIXME: Do we really need to update the sta_info's information here?
1520 * We already know about the AP (we found it in our list) so it
1521 * should already be filled with the right info, no?
1522 * As is stands, all this is racy because typically we assume
1523 * the information that is filled in here (except flags) doesn't
1524 * change while a STA structure is alive. As such, it should move
1525 * to between the sta_info_alloc() and sta_info_insert() above.
1528 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP);
1529 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1530 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1534 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1536 for (i = 0; i < elems.supp_rates_len; i++) {
1537 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1538 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1541 have_higher_than_11mbit = true;
1543 for (j = 0; j < sband->n_bitrates; j++) {
1544 if (sband->bitrates[j].bitrate == rate) {
1547 basic_rates |= BIT(j);
1553 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1554 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1555 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1558 have_higher_than_11mbit = true;
1560 for (j = 0; j < sband->n_bitrates; j++) {
1561 if (sband->bitrates[j].bitrate == rate) {
1564 basic_rates |= BIT(j);
1570 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1571 sdata->vif.bss_conf.basic_rates = basic_rates;
1573 /* cf. IEEE 802.11 9.2.12 */
1574 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1575 have_higher_than_11mbit)
1576 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1578 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1580 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1581 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1582 elems.ht_cap_elem, &sta->sta.ht_cap);
1584 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1586 rate_control_rate_init(sta);
1588 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1589 set_sta_flags(sta, WLAN_STA_MFP);
1591 if (elems.wmm_param)
1592 set_sta_flags(sta, WLAN_STA_WME);
1595 int err = sta_info_insert(sta);
1597 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1598 " the AP (error %d)\n", sdata->dev->name, err);
1606 if (elems.wmm_param)
1607 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1608 elems.wmm_param_len);
1610 ieee80211_set_wmm_default(sdata);
1612 if (elems.ht_info_elem && elems.wmm_param &&
1613 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1614 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1615 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1618 /* set AID and assoc capability,
1619 * ieee80211_set_associated() will tell the driver */
1620 bss_conf->aid = aid;
1621 bss_conf->assoc_capability = capab_info;
1622 ieee80211_set_associated(sdata, changed);
1625 * initialise the time of last beacon to be the association time,
1626 * otherwise beacon loss check will trigger immediately
1628 ifmgd->last_beacon = jiffies;
1630 ieee80211_associated(sdata);
1631 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL);
1635 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1636 struct ieee80211_mgmt *mgmt,
1638 struct ieee80211_rx_status *rx_status,
1639 struct ieee802_11_elems *elems,
1642 struct ieee80211_local *local = sdata->local;
1644 struct ieee80211_bss *bss;
1645 struct ieee80211_channel *channel;
1647 if (elems->ds_params && elems->ds_params_len == 1)
1648 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1650 freq = rx_status->freq;
1652 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1654 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1657 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1662 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1663 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1664 struct ieee80211_channel_sw_ie *sw_elem =
1665 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1666 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1669 ieee80211_rx_bss_put(local, bss);
1673 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1674 struct ieee80211_mgmt *mgmt,
1676 struct ieee80211_rx_status *rx_status)
1678 struct ieee80211_if_managed *ifmgd;
1680 struct ieee802_11_elems elems;
1682 ifmgd = &sdata->u.mgd;
1684 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1685 return; /* ignore ProbeResp to foreign address */
1687 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1691 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1694 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1696 /* direct probe may be part of the association flow */
1697 if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
1698 printk(KERN_DEBUG "%s direct probe responded\n",
1700 ieee80211_authenticate(sdata);
1703 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1704 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1705 mutex_lock(&sdata->local->iflist_mtx);
1706 ieee80211_recalc_ps(sdata->local, -1);
1707 mutex_unlock(&sdata->local->iflist_mtx);
1712 * This is the canonical list of information elements we care about,
1713 * the filter code also gives us all changes to the Microsoft OUI
1714 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1716 * We implement beacon filtering in software since that means we can
1717 * avoid processing the frame here and in cfg80211, and userspace
1718 * will not be able to tell whether the hardware supports it or not.
1720 * XXX: This list needs to be dynamic -- userspace needs to be able to
1721 * add items it requires. It also needs to be able to tell us to
1722 * look out for other vendor IEs.
1724 static const u64 care_about_ies =
1725 (1ULL << WLAN_EID_COUNTRY) |
1726 (1ULL << WLAN_EID_ERP_INFO) |
1727 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1728 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1729 (1ULL << WLAN_EID_HT_CAPABILITY) |
1730 (1ULL << WLAN_EID_HT_INFORMATION);
1732 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1733 struct ieee80211_mgmt *mgmt,
1735 struct ieee80211_rx_status *rx_status)
1737 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1739 struct ieee802_11_elems elems;
1740 struct ieee80211_local *local = sdata->local;
1742 bool erp_valid, directed_tim = false;
1746 /* Process beacon from the current BSS */
1747 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1751 if (rx_status->freq != local->hw.conf.channel->center_freq)
1754 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1755 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1758 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1759 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1760 if (net_ratelimit()) {
1761 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1762 "to a received beacon\n", sdata->dev->name);
1765 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1766 mutex_lock(&local->iflist_mtx);
1767 ieee80211_recalc_ps(local, -1);
1768 mutex_unlock(&local->iflist_mtx);
1771 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1772 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1773 len - baselen, &elems,
1774 care_about_ies, ncrc);
1776 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1777 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1780 if (ncrc != ifmgd->beacon_crc) {
1781 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1784 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1785 elems.wmm_param_len);
1788 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1790 if (local->hw.conf.dynamic_ps_timeout > 0) {
1791 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1792 ieee80211_hw_config(local,
1793 IEEE80211_CONF_CHANGE_PS);
1794 ieee80211_send_nullfunc(local, sdata, 0);
1796 local->pspolling = true;
1799 * Here is assumed that the driver will be
1800 * able to send ps-poll frame and receive a
1801 * response even though power save mode is
1802 * enabled, but some drivers might require
1803 * to disable power save here. This needs
1804 * to be investigated.
1806 ieee80211_send_pspoll(local, sdata);
1811 if (ncrc == ifmgd->beacon_crc)
1813 ifmgd->beacon_crc = ncrc;
1815 if (elems.erp_info && elems.erp_info_len >= 1) {
1817 erp_value = elems.erp_info[0];
1821 changed |= ieee80211_handle_bss_capability(sdata,
1822 le16_to_cpu(mgmt->u.beacon.capab_info),
1823 erp_valid, erp_value);
1826 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1827 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1828 struct sta_info *sta;
1829 struct ieee80211_supported_band *sband;
1830 u16 ap_ht_cap_flags;
1834 sta = sta_info_get(local, ifmgd->bssid);
1840 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1842 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1843 elems.ht_cap_elem, &sta->sta.ht_cap);
1845 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1849 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1853 if (elems.country_elem) {
1854 /* Note we are only reviewing this on beacons
1855 * for the BSSID we are associated to */
1856 regulatory_hint_11d(local->hw.wiphy,
1857 elems.country_elem, elems.country_elem_len);
1859 /* TODO: IBSS also needs this */
1860 if (elems.pwr_constr_elem)
1861 ieee80211_handle_pwr_constr(sdata,
1862 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1863 elems.pwr_constr_elem,
1864 elems.pwr_constr_elem_len);
1867 ieee80211_bss_info_change_notify(sdata, changed);
1870 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1871 struct sk_buff *skb)
1873 struct ieee80211_local *local = sdata->local;
1874 struct ieee80211_mgmt *mgmt;
1878 return RX_DROP_MONITOR;
1880 mgmt = (struct ieee80211_mgmt *) skb->data;
1881 fc = le16_to_cpu(mgmt->frame_control);
1883 switch (fc & IEEE80211_FCTL_STYPE) {
1884 case IEEE80211_STYPE_PROBE_REQ:
1885 case IEEE80211_STYPE_PROBE_RESP:
1886 case IEEE80211_STYPE_BEACON:
1887 case IEEE80211_STYPE_AUTH:
1888 case IEEE80211_STYPE_ASSOC_RESP:
1889 case IEEE80211_STYPE_REASSOC_RESP:
1890 case IEEE80211_STYPE_DEAUTH:
1891 case IEEE80211_STYPE_DISASSOC:
1892 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1893 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1897 return RX_DROP_MONITOR;
1900 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1901 struct sk_buff *skb)
1903 struct ieee80211_rx_status *rx_status;
1904 struct ieee80211_mgmt *mgmt;
1907 rx_status = (struct ieee80211_rx_status *) skb->cb;
1908 mgmt = (struct ieee80211_mgmt *) skb->data;
1909 fc = le16_to_cpu(mgmt->frame_control);
1911 switch (fc & IEEE80211_FCTL_STYPE) {
1912 case IEEE80211_STYPE_PROBE_RESP:
1913 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1916 case IEEE80211_STYPE_BEACON:
1917 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1920 case IEEE80211_STYPE_AUTH:
1921 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1923 case IEEE80211_STYPE_ASSOC_RESP:
1924 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1926 case IEEE80211_STYPE_REASSOC_RESP:
1927 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1929 case IEEE80211_STYPE_DEAUTH:
1930 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1932 case IEEE80211_STYPE_DISASSOC:
1933 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1940 static void ieee80211_sta_timer(unsigned long data)
1942 struct ieee80211_sub_if_data *sdata =
1943 (struct ieee80211_sub_if_data *) data;
1944 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1945 struct ieee80211_local *local = sdata->local;
1947 if (local->quiescing) {
1948 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1952 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1953 queue_work(local->hw.workqueue, &ifmgd->work);
1956 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1958 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1959 struct ieee80211_local *local = sdata->local;
1961 /* Reset own TSF to allow time synchronization work. */
1962 drv_reset_tsf(local);
1964 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1965 ifmgd->auth_transaction = -1;
1966 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1967 ifmgd->assoc_scan_tries = 0;
1968 ifmgd->direct_probe_tries = 0;
1969 ifmgd->auth_tries = 0;
1970 ifmgd->assoc_tries = 0;
1971 netif_tx_stop_all_queues(sdata->dev);
1972 netif_carrier_off(sdata->dev);
1975 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
1977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1978 struct ieee80211_local *local = sdata->local;
1979 struct ieee80211_bss *bss;
1980 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1981 u8 ssid_len = ifmgd->ssid_len;
1982 u16 capa_mask = WLAN_CAPABILITY_ESS;
1983 u16 capa_val = WLAN_CAPABILITY_ESS;
1984 struct ieee80211_channel *chan = local->oper_channel;
1986 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1987 bssid, ssid, ssid_len,
1988 capa_mask, capa_val);
1991 local->oper_channel = bss->cbss.channel;
1992 local->oper_channel_type = NL80211_CHAN_NO_HT;
1993 ieee80211_hw_config(local, 0);
1995 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1997 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1998 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2000 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2002 /* Send out direct probe if no probe resp was received or
2003 * the one we have is outdated
2005 if (!bss->last_probe_resp ||
2006 time_after(jiffies, bss->last_probe_resp
2007 + IEEE80211_SCAN_RESULT_EXPIRE))
2008 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2010 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2012 ieee80211_rx_bss_put(local, bss);
2013 ieee80211_sta_reset_auth(sdata);
2016 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2018 ifmgd->assoc_scan_tries++;
2020 ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2023 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2024 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2026 ifmgd->assoc_scan_tries = 0;
2027 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2028 ieee80211_recalc_idle(local);
2035 static void ieee80211_sta_work(struct work_struct *work)
2037 struct ieee80211_sub_if_data *sdata =
2038 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2039 struct ieee80211_local *local = sdata->local;
2040 struct ieee80211_if_managed *ifmgd;
2041 struct sk_buff *skb;
2043 if (!netif_running(sdata->dev))
2046 if (local->sw_scanning || local->hw_scanning)
2049 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2053 * Nothing should have been stuffed into the workqueue during
2054 * the suspend->resume cycle. If this WARN is seen then there
2055 * is a bug with either the driver suspend or something in
2056 * mac80211 stuffing into the workqueue which we haven't yet
2057 * cleared during mac80211's suspend cycle.
2059 if (WARN_ON(local->suspended))
2062 ifmgd = &sdata->u.mgd;
2064 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2065 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2067 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2068 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2069 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2070 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2071 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2072 round_jiffies_relative(0));
2076 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2077 if (ieee80211_sta_config_auth(sdata))
2079 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2080 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2083 ieee80211_recalc_idle(local);
2085 switch (ifmgd->state) {
2086 case IEEE80211_STA_MLME_DISABLED:
2088 case IEEE80211_STA_MLME_DIRECT_PROBE:
2089 ieee80211_direct_probe(sdata);
2091 case IEEE80211_STA_MLME_AUTHENTICATE:
2092 ieee80211_authenticate(sdata);
2094 case IEEE80211_STA_MLME_ASSOCIATE:
2095 ieee80211_associate(sdata);
2097 case IEEE80211_STA_MLME_ASSOCIATED:
2098 ieee80211_associated(sdata);
2106 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2108 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2110 * Need to update last_beacon to avoid beacon loss
2113 sdata->u.mgd.last_beacon = jiffies;
2116 queue_work(sdata->local->hw.workqueue,
2117 &sdata->u.mgd.work);
2122 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2127 * we need to use atomic bitops for the running bits
2128 * only because both timers might fire at the same
2129 * time -- the code here is properly synchronised.
2132 cancel_work_sync(&ifmgd->work);
2133 cancel_work_sync(&ifmgd->beacon_loss_work);
2134 if (del_timer_sync(&ifmgd->timer))
2135 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2137 cancel_work_sync(&ifmgd->chswitch_work);
2138 if (del_timer_sync(&ifmgd->chswitch_timer))
2139 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2142 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2144 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2146 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2147 add_timer(&ifmgd->timer);
2148 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2149 add_timer(&ifmgd->chswitch_timer);
2153 /* interface setup */
2154 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2156 struct ieee80211_if_managed *ifmgd;
2159 ifmgd = &sdata->u.mgd;
2160 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2161 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2162 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2163 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2164 (unsigned long) sdata);
2165 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2166 (unsigned long) sdata);
2167 skb_queue_head_init(&ifmgd->skb_queue);
2169 ifmgd->capab = WLAN_CAPABILITY_ESS;
2171 if (sdata->local->hw.queues >= 4)
2172 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2174 hw_flags = sdata->local->hw.flags;
2177 /* configuration hooks */
2178 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2180 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2181 struct ieee80211_local *local = sdata->local;
2183 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2186 if (WARN_ON(ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED))
2187 ieee80211_set_disassoc(sdata, true, true,
2188 WLAN_REASON_DEAUTH_LEAVING);
2190 if (WARN_ON(ifmgd->ssid_len == 0)) {
2192 * Only allow association to be started if a valid SSID
2198 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2199 queue_work(local->hw.workqueue, &ifmgd->work);
2202 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2203 const char *ie, size_t len)
2205 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2207 if (len == 0 && ifmgd->extra_ie_len == 0)
2210 if (len == ifmgd->extra_ie_len && ifmgd->extra_ie &&
2211 memcmp(ifmgd->extra_ie, ie, len) == 0)
2214 kfree(ifmgd->extra_ie);
2216 ifmgd->extra_ie = NULL;
2217 ifmgd->extra_ie_len = 0;
2220 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2221 if (!ifmgd->extra_ie) {
2222 ifmgd->extra_ie_len = 0;
2225 memcpy(ifmgd->extra_ie, ie, len);
2226 ifmgd->extra_ie_len = len;
2230 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2232 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2233 sdata->dev->name, reason);
2235 ieee80211_set_disassoc(sdata, true, true, reason);
2239 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2241 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2243 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2244 sdata->dev->name, reason);
2246 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2249 ieee80211_set_disassoc(sdata, false, true, reason);
2253 /* scan finished notification */
2254 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2256 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2258 /* Restart STA timers */
2260 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2261 ieee80211_restart_sta_timer(sdata);
2265 int ieee80211_max_network_latency(struct notifier_block *nb,
2266 unsigned long data, void *dummy)
2268 s32 latency_usec = (s32) data;
2269 struct ieee80211_local *local =
2270 container_of(nb, struct ieee80211_local,
2271 network_latency_notifier);
2273 mutex_lock(&local->iflist_mtx);
2274 ieee80211_recalc_ps(local, latency_usec);
2275 mutex_unlock(&local->iflist_mtx);