2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/pm_qos_params.h>
21 #include <linux/crc32.h>
22 #include <net/mac80211.h>
23 #include <asm/unaligned.h>
25 #include "ieee80211_i.h"
26 #include "driver-ops.h"
30 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
31 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32 #define IEEE80211_AUTH_MAX_TRIES 3
33 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34 #define IEEE80211_ASSOC_MAX_TRIES 3
35 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
36 #define IEEE80211_PROBE_WAIT (HZ / 20)
37 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
38 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
41 static int ecw2cw(int ecw)
43 return (1 << ecw) - 1;
46 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
50 pos = bss->cbss.information_elements;
53 end = pos + bss->cbss.len_information_elements;
55 while (pos + 1 < end) {
56 if (pos + 2 + pos[1] > end)
66 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
67 struct ieee80211_supported_band *sband,
73 for (i = 0; i < bss->supp_rates_len; i++) {
74 int rate = (bss->supp_rates[i] & 0x7F) * 5;
76 for (j = 0; j < sband->n_bitrates; j++)
77 if (sband->bitrates[j].bitrate == rate) {
88 * ieee80211_enable_ht should be called only after the operating band
89 * has been determined as ht configuration depends on the hw's
90 * HT abilities for a specific band.
92 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
93 struct ieee80211_ht_info *hti,
96 struct ieee80211_local *local = sdata->local;
97 struct ieee80211_supported_band *sband;
98 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
102 bool enable_ht = true, ht_changed;
103 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
105 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
107 /* HT is not supported */
108 if (!sband->ht_cap.ht_supported)
111 /* check that channel matches the right operating channel */
112 if (local->hw.conf.channel->center_freq !=
113 ieee80211_channel_to_frequency(hti->control_chan))
117 channel_type = NL80211_CHAN_HT20;
119 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
120 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
121 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
122 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
123 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
124 if (!(local->hw.conf.channel->flags &
125 IEEE80211_CHAN_NO_HT40PLUS))
126 channel_type = NL80211_CHAN_HT40PLUS;
128 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
129 if (!(local->hw.conf.channel->flags &
130 IEEE80211_CHAN_NO_HT40MINUS))
131 channel_type = NL80211_CHAN_HT40MINUS;
137 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
138 channel_type != local->hw.conf.channel_type;
140 local->oper_channel_type = channel_type;
143 /* channel_type change automatically detected */
144 ieee80211_hw_config(local, 0);
148 sta = sta_info_get(local, ifmgd->bssid);
150 rate_control_rate_update(local, sband, sta,
151 IEEE80211_RC_HT_CHANGED);
160 ht_opmode = le16_to_cpu(hti->operation_mode);
162 /* if bss configuration changed store the new one */
163 if (!sdata->ht_opmode_valid ||
164 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
165 changed |= BSS_CHANGED_HT;
166 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
167 sdata->ht_opmode_valid = true;
173 /* frame sending functions */
175 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
177 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
178 struct ieee80211_local *local = sdata->local;
180 struct ieee80211_mgmt *mgmt;
181 u8 *pos, *ies, *ht_ie;
182 int i, len, count, rates_len, supp_rates_len;
184 struct ieee80211_bss *bss;
186 struct ieee80211_supported_band *sband;
189 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
190 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
193 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
194 "frame\n", sdata->dev->name);
197 skb_reserve(skb, local->hw.extra_tx_headroom);
199 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
201 capab = ifmgd->capab;
203 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
204 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
205 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
206 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
207 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
210 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
211 local->hw.conf.channel->center_freq,
212 ifmgd->ssid, ifmgd->ssid_len);
214 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
215 capab |= WLAN_CAPABILITY_PRIVACY;
219 /* get all rates supported by the device and the AP as
220 * some APs don't like getting a superset of their rates
221 * in the association request (e.g. D-Link DAP 1353 in
223 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
225 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
226 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
227 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
229 ieee80211_rx_bss_put(local, bss);
232 rates_len = sband->n_bitrates;
235 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
237 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
238 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
239 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
241 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
243 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
244 IEEE80211_STYPE_REASSOC_REQ);
245 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
246 mgmt->u.reassoc_req.listen_interval =
247 cpu_to_le16(local->hw.conf.listen_interval);
248 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
252 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
253 IEEE80211_STYPE_ASSOC_REQ);
254 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
255 mgmt->u.assoc_req.listen_interval =
256 cpu_to_le16(local->hw.conf.listen_interval);
260 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
261 *pos++ = WLAN_EID_SSID;
262 *pos++ = ifmgd->ssid_len;
263 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
265 /* add all rates which were marked to be used above */
266 supp_rates_len = rates_len;
267 if (supp_rates_len > 8)
270 len = sband->n_bitrates;
271 pos = skb_put(skb, supp_rates_len + 2);
272 *pos++ = WLAN_EID_SUPP_RATES;
273 *pos++ = supp_rates_len;
276 for (i = 0; i < sband->n_bitrates; i++) {
277 if (BIT(i) & rates) {
278 int rate = sband->bitrates[i].bitrate;
279 *pos++ = (u8) (rate / 5);
285 if (rates_len > count) {
286 pos = skb_put(skb, rates_len - count + 2);
287 *pos++ = WLAN_EID_EXT_SUPP_RATES;
288 *pos++ = rates_len - count;
290 for (i++; i < sband->n_bitrates; i++) {
291 if (BIT(i) & rates) {
292 int rate = sband->bitrates[i].bitrate;
293 *pos++ = (u8) (rate / 5);
298 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
299 /* 1. power capabilities */
300 pos = skb_put(skb, 4);
301 *pos++ = WLAN_EID_PWR_CAPABILITY;
303 *pos++ = 0; /* min tx power */
304 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
306 /* 2. supported channels */
307 /* TODO: get this in reg domain format */
308 pos = skb_put(skb, 2 * sband->n_channels + 2);
309 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
310 *pos++ = 2 * sband->n_channels;
311 for (i = 0; i < sband->n_channels; i++) {
312 *pos++ = ieee80211_frequency_to_channel(
313 sband->channels[i].center_freq);
314 *pos++ = 1; /* one channel in the subband*/
318 if (ifmgd->extra_ie) {
319 pos = skb_put(skb, ifmgd->extra_ie_len);
320 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
323 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
324 pos = skb_put(skb, 9);
325 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
326 *pos++ = 7; /* len */
327 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
330 *pos++ = 2; /* WME */
331 *pos++ = 0; /* WME info */
332 *pos++ = 1; /* WME ver */
336 /* wmm support is a must to HT */
338 * IEEE802.11n does not allow TKIP/WEP as pairwise
339 * ciphers in HT mode. We still associate in non-ht
340 * mode (11a/b/g) if any one of these ciphers is
341 * configured as pairwise.
343 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
344 sband->ht_cap.ht_supported &&
345 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
346 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
347 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
348 struct ieee80211_ht_info *ht_info =
349 (struct ieee80211_ht_info *)(ht_ie + 2);
350 u16 cap = sband->ht_cap.cap;
352 u32 flags = local->hw.conf.channel->flags;
354 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
355 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
356 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
357 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
358 cap &= ~IEEE80211_HT_CAP_SGI_40;
361 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
362 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
363 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
364 cap &= ~IEEE80211_HT_CAP_SGI_40;
369 tmp = cpu_to_le16(cap);
370 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
371 *pos++ = WLAN_EID_HT_CAPABILITY;
372 *pos++ = sizeof(struct ieee80211_ht_cap);
373 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
374 memcpy(pos, &tmp, sizeof(u16));
376 /* TODO: needs a define here for << 2 */
377 *pos++ = sband->ht_cap.ampdu_factor |
378 (sband->ht_cap.ampdu_density << 2);
379 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
382 kfree(ifmgd->assocreq_ies);
383 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
384 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
385 if (ifmgd->assocreq_ies)
386 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
388 ieee80211_tx_skb(sdata, skb, 0);
392 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
393 u16 stype, u16 reason)
395 struct ieee80211_local *local = sdata->local;
396 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
398 struct ieee80211_mgmt *mgmt;
400 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
402 printk(KERN_DEBUG "%s: failed to allocate buffer for "
403 "deauth/disassoc frame\n", sdata->dev->name);
406 skb_reserve(skb, local->hw.extra_tx_headroom);
408 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
410 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
411 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
412 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
413 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
415 /* u.deauth.reason_code == u.disassoc.reason_code */
416 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
418 if (stype == IEEE80211_STYPE_DEAUTH)
419 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len);
421 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len);
422 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
425 void ieee80211_send_pspoll(struct ieee80211_local *local,
426 struct ieee80211_sub_if_data *sdata)
428 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
429 struct ieee80211_pspoll *pspoll;
433 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
435 printk(KERN_DEBUG "%s: failed to allocate buffer for "
436 "pspoll frame\n", sdata->dev->name);
439 skb_reserve(skb, local->hw.extra_tx_headroom);
441 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
442 memset(pspoll, 0, sizeof(*pspoll));
443 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
444 pspoll->frame_control = cpu_to_le16(fc);
445 pspoll->aid = cpu_to_le16(ifmgd->aid);
447 /* aid in PS-Poll has its two MSBs each set to 1 */
448 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
450 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
451 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
453 ieee80211_tx_skb(sdata, skb, 0);
456 void ieee80211_send_nullfunc(struct ieee80211_local *local,
457 struct ieee80211_sub_if_data *sdata,
461 struct ieee80211_hdr *nullfunc;
464 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
467 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
469 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
470 "frame\n", sdata->dev->name);
473 skb_reserve(skb, local->hw.extra_tx_headroom);
475 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
476 memset(nullfunc, 0, 24);
477 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
478 IEEE80211_FCTL_TODS);
480 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
481 nullfunc->frame_control = fc;
482 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
483 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
484 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
486 ieee80211_tx_skb(sdata, skb, 0);
489 /* spectrum management related things */
490 static void ieee80211_chswitch_work(struct work_struct *work)
492 struct ieee80211_sub_if_data *sdata =
493 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
494 struct ieee80211_bss *bss;
495 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
497 if (!netif_running(sdata->dev))
500 bss = ieee80211_rx_bss_get(sdata->local, ifmgd->bssid,
501 sdata->local->hw.conf.channel->center_freq,
502 ifmgd->ssid, ifmgd->ssid_len);
506 sdata->local->oper_channel = sdata->local->csa_channel;
507 /* XXX: shouldn't really modify cfg80211-owned data! */
508 if (!ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL))
509 bss->cbss.channel = sdata->local->oper_channel;
511 ieee80211_rx_bss_put(sdata->local, bss);
513 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
514 ieee80211_wake_queues_by_reason(&sdata->local->hw,
515 IEEE80211_QUEUE_STOP_REASON_CSA);
518 static void ieee80211_chswitch_timer(unsigned long data)
520 struct ieee80211_sub_if_data *sdata =
521 (struct ieee80211_sub_if_data *) data;
522 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
524 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
527 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
528 struct ieee80211_channel_sw_ie *sw_elem,
529 struct ieee80211_bss *bss)
531 struct ieee80211_channel *new_ch;
532 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
533 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
535 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATED)
538 if (sdata->local->sw_scanning || sdata->local->hw_scanning)
541 /* Disregard subsequent beacons if we are already running a timer
544 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
547 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
548 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
551 sdata->local->csa_channel = new_ch;
553 if (sw_elem->count <= 1) {
554 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
556 ieee80211_stop_queues_by_reason(&sdata->local->hw,
557 IEEE80211_QUEUE_STOP_REASON_CSA);
558 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
559 mod_timer(&ifmgd->chswitch_timer,
561 msecs_to_jiffies(sw_elem->count *
562 bss->cbss.beacon_interval));
566 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
567 u16 capab_info, u8 *pwr_constr_elem,
568 u8 pwr_constr_elem_len)
570 struct ieee80211_conf *conf = &sdata->local->hw.conf;
572 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
575 /* Power constraint IE length should be 1 octet */
576 if (pwr_constr_elem_len != 1)
579 if ((*pwr_constr_elem <= conf->channel->max_power) &&
580 (*pwr_constr_elem != sdata->local->power_constr_level)) {
581 sdata->local->power_constr_level = *pwr_constr_elem;
582 ieee80211_hw_config(sdata->local, 0);
587 static void ieee80211_enable_ps(struct ieee80211_local *local,
588 struct ieee80211_sub_if_data *sdata)
590 struct ieee80211_conf *conf = &local->hw.conf;
593 * If we are scanning right now then the parameters will
594 * take effect when scan finishes.
596 if (local->hw_scanning || local->sw_scanning)
599 if (conf->dynamic_ps_timeout > 0 &&
600 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
601 mod_timer(&local->dynamic_ps_timer, jiffies +
602 msecs_to_jiffies(conf->dynamic_ps_timeout));
604 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
605 ieee80211_send_nullfunc(local, sdata, 1);
606 conf->flags |= IEEE80211_CONF_PS;
607 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
611 static void ieee80211_change_ps(struct ieee80211_local *local)
613 struct ieee80211_conf *conf = &local->hw.conf;
615 if (local->ps_sdata) {
616 if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED))
619 ieee80211_enable_ps(local, local->ps_sdata);
620 } else if (conf->flags & IEEE80211_CONF_PS) {
621 conf->flags &= ~IEEE80211_CONF_PS;
622 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
623 del_timer_sync(&local->dynamic_ps_timer);
624 cancel_work_sync(&local->dynamic_ps_enable_work);
628 /* need to hold RTNL or interface lock */
629 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
631 struct ieee80211_sub_if_data *sdata, *found = NULL;
634 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
635 local->ps_sdata = NULL;
639 list_for_each_entry(sdata, &local->interfaces, list) {
640 if (!netif_running(sdata->dev))
642 if (sdata->vif.type != NL80211_IFTYPE_STATION)
648 if (count == 1 && found->u.mgd.powersave) {
652 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
654 beaconint_us = ieee80211_tu_to_usec(
655 found->vif.bss_conf.beacon_int);
657 if (beaconint_us > latency) {
658 local->ps_sdata = NULL;
660 u8 dtimper = found->vif.bss_conf.dtim_period;
664 maxslp = min_t(int, dtimper,
665 latency / beaconint_us);
667 local->hw.conf.max_sleep_period = maxslp;
668 local->ps_sdata = found;
671 local->ps_sdata = NULL;
674 ieee80211_change_ps(local);
677 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
679 struct ieee80211_local *local =
680 container_of(work, struct ieee80211_local,
681 dynamic_ps_disable_work);
683 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
684 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
685 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
688 ieee80211_wake_queues_by_reason(&local->hw,
689 IEEE80211_QUEUE_STOP_REASON_PS);
692 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
694 struct ieee80211_local *local =
695 container_of(work, struct ieee80211_local,
696 dynamic_ps_enable_work);
697 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
699 /* can only happen when PS was just disabled anyway */
703 if (local->hw.conf.flags & IEEE80211_CONF_PS)
706 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
707 ieee80211_send_nullfunc(local, sdata, 1);
709 local->hw.conf.flags |= IEEE80211_CONF_PS;
710 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
713 void ieee80211_dynamic_ps_timer(unsigned long data)
715 struct ieee80211_local *local = (void *) data;
717 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
721 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
722 struct ieee80211_if_managed *ifmgd,
723 u8 *wmm_param, size_t wmm_param_len)
725 struct ieee80211_tx_queue_params params;
730 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
736 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
738 count = wmm_param[6] & 0x0f;
739 if (count == ifmgd->wmm_last_param_set)
741 ifmgd->wmm_last_param_set = count;
744 left = wmm_param_len - 8;
746 memset(¶ms, 0, sizeof(params));
749 for (; left >= 4; left -= 4, pos += 4) {
750 int aci = (pos[0] >> 5) & 0x03;
751 int acm = (pos[0] >> 4) & 0x01;
758 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
763 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
768 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
774 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
778 params.aifs = pos[0] & 0x0f;
779 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
780 params.cw_min = ecw2cw(pos[1] & 0x0f);
781 params.txop = get_unaligned_le16(pos + 2);
782 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
783 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
784 "cWmin=%d cWmax=%d txop=%d\n",
785 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
786 params.cw_max, params.txop);
788 if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx)
789 printk(KERN_DEBUG "%s: failed to set TX queue "
790 "parameters for queue %d\n", local->mdev->name,
795 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
796 u16 capab, bool erp_valid, u8 erp)
798 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
799 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
800 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
804 bool use_short_preamble;
808 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
809 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
811 use_protection = false;
812 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
815 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
817 if (use_protection != bss_conf->use_cts_prot) {
818 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
819 if (net_ratelimit()) {
820 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
822 use_protection ? "enabled" : "disabled",
826 bss_conf->use_cts_prot = use_protection;
827 changed |= BSS_CHANGED_ERP_CTS_PROT;
830 if (use_short_preamble != bss_conf->use_short_preamble) {
831 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
832 if (net_ratelimit()) {
833 printk(KERN_DEBUG "%s: switched to %s barker preamble"
836 use_short_preamble ? "short" : "long",
840 bss_conf->use_short_preamble = use_short_preamble;
841 changed |= BSS_CHANGED_ERP_PREAMBLE;
844 if (use_short_slot != bss_conf->use_short_slot) {
845 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
846 if (net_ratelimit()) {
847 printk(KERN_DEBUG "%s: switched to %s slot time"
850 use_short_slot ? "short" : "long",
854 bss_conf->use_short_slot = use_short_slot;
855 changed |= BSS_CHANGED_ERP_SLOT;
861 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
863 union iwreq_data wrqu;
865 memset(&wrqu, 0, sizeof(wrqu));
866 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
867 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
868 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
869 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
872 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
874 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
878 union iwreq_data wrqu;
880 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
883 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
884 ifmgd->assocresp_ies_len), GFP_KERNEL);
888 len = sprintf(buf, "ASSOCINFO(");
889 if (ifmgd->assocreq_ies) {
890 len += sprintf(buf + len, "ReqIEs=");
891 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
892 len += sprintf(buf + len, "%02x",
893 ifmgd->assocreq_ies[i]);
896 if (ifmgd->assocresp_ies) {
897 if (ifmgd->assocreq_ies)
898 len += sprintf(buf + len, " ");
899 len += sprintf(buf + len, "RespIEs=");
900 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
901 len += sprintf(buf + len, "%02x",
902 ifmgd->assocresp_ies[i]);
905 len += sprintf(buf + len, ")");
907 if (len > IW_CUSTOM_MAX) {
908 len = sprintf(buf, "ASSOCRESPIE=");
909 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
910 len += sprintf(buf + len, "%02x",
911 ifmgd->assocresp_ies[i]);
915 if (len <= IW_CUSTOM_MAX) {
916 memset(&wrqu, 0, sizeof(wrqu));
917 wrqu.data.length = len;
918 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
925 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
926 u32 bss_info_changed)
928 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
929 struct ieee80211_local *local = sdata->local;
930 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
932 struct ieee80211_bss *bss;
934 bss_info_changed |= BSS_CHANGED_ASSOC;
935 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
937 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
938 conf->channel->center_freq,
939 ifmgd->ssid, ifmgd->ssid_len);
941 /* set timing information */
942 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
943 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
944 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
946 bss_info_changed |= BSS_CHANGED_BEACON_INT;
947 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
948 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
950 cfg80211_hold_bss(&bss->cbss);
952 ieee80211_rx_bss_put(local, bss);
955 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
956 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
957 ieee80211_sta_send_associnfo(sdata);
959 ifmgd->last_probe = jiffies;
960 ieee80211_led_assoc(local, 1);
962 sdata->vif.bss_conf.assoc = 1;
964 * For now just always ask the driver to update the basic rateset
965 * when we have associated, we aren't checking whether it actually
968 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
969 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
971 /* will be same as sdata */
972 if (local->ps_sdata) {
973 mutex_lock(&local->iflist_mtx);
974 ieee80211_recalc_ps(local, -1);
975 mutex_unlock(&local->iflist_mtx);
978 netif_tx_start_all_queues(sdata->dev);
979 netif_carrier_on(sdata->dev);
981 ieee80211_sta_send_apinfo(sdata);
984 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
986 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
987 struct ieee80211_local *local = sdata->local;
989 ifmgd->direct_probe_tries++;
990 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
991 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
992 sdata->dev->name, ifmgd->bssid);
993 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
994 ieee80211_recalc_idle(local);
995 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
998 * Most likely AP is not in the range so remove the
999 * bss information associated to the AP
1001 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1002 sdata->local->hw.conf.channel->center_freq,
1003 ifmgd->ssid, ifmgd->ssid_len);
1006 * We might have a pending scan which had no chance to run yet
1007 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
1008 * Hence, queue the STAs work again
1010 queue_work(local->hw.workqueue, &ifmgd->work);
1014 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
1015 sdata->dev->name, ifmgd->bssid,
1016 ifmgd->direct_probe_tries);
1018 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1020 /* Direct probe is sent to broadcast address as some APs
1021 * will not answer to direct packet in unassociated state.
1023 ieee80211_send_probe_req(sdata, NULL,
1024 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
1026 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
1030 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
1032 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1033 struct ieee80211_local *local = sdata->local;
1037 ifmgd->auth_tries++;
1038 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
1039 printk(KERN_DEBUG "%s: authentication with AP %pM"
1041 sdata->dev->name, ifmgd->bssid);
1042 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1043 ieee80211_recalc_idle(local);
1044 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
1045 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1046 sdata->local->hw.conf.channel->center_freq,
1047 ifmgd->ssid, ifmgd->ssid_len);
1050 * We might have a pending scan which had no chance to run yet
1051 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
1052 * Hence, queue the STAs work again
1054 queue_work(local->hw.workqueue, &ifmgd->work);
1058 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1059 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
1060 sdata->dev->name, ifmgd->bssid);
1062 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1063 ies = ifmgd->sme_auth_ie;
1064 ies_len = ifmgd->sme_auth_ie_len;
1069 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
1071 ifmgd->auth_transaction = 2;
1073 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
1077 * The disassoc 'reason' argument can be either our own reason
1078 * if self disconnected or a reason code from the AP.
1080 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1081 bool deauth, bool self_disconnected,
1084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1085 struct ieee80211_local *local = sdata->local;
1086 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
1087 struct ieee80211_bss *bss;
1088 struct sta_info *sta;
1089 u32 changed = 0, config_changed = 0;
1093 sta = sta_info_get(local, ifmgd->bssid);
1100 ifmgd->direct_probe_tries = 0;
1101 ifmgd->auth_tries = 0;
1103 ifmgd->assoc_scan_tries = 0;
1104 ifmgd->assoc_tries = 0;
1106 netif_tx_stop_all_queues(sdata->dev);
1107 netif_carrier_off(sdata->dev);
1109 ieee80211_sta_tear_down_BA_sessions(sta);
1111 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1112 conf->channel->center_freq,
1113 ifmgd->ssid, ifmgd->ssid_len);
1116 cfg80211_unhold_bss(&bss->cbss);
1117 ieee80211_rx_bss_put(local, bss);
1120 if (self_disconnected) {
1122 ieee80211_send_deauth_disassoc(sdata,
1123 IEEE80211_STYPE_DEAUTH, reason);
1125 ieee80211_send_deauth_disassoc(sdata,
1126 IEEE80211_STYPE_DISASSOC, reason);
1129 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1130 changed |= ieee80211_reset_erp_info(sdata);
1132 ieee80211_led_assoc(local, 0);
1133 changed |= BSS_CHANGED_ASSOC;
1134 sdata->vif.bss_conf.assoc = false;
1136 ieee80211_sta_send_apinfo(sdata);
1138 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1139 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1140 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1141 sdata->local->hw.conf.channel->center_freq,
1142 ifmgd->ssid, ifmgd->ssid_len);
1147 ieee80211_set_wmm_default(sdata);
1149 ieee80211_recalc_idle(local);
1151 /* channel(_type) changes are handled by ieee80211_hw_config */
1152 local->oper_channel_type = NL80211_CHAN_NO_HT;
1154 /* on the next assoc, re-program HT parameters */
1155 sdata->ht_opmode_valid = false;
1157 local->power_constr_level = 0;
1159 del_timer_sync(&local->dynamic_ps_timer);
1160 cancel_work_sync(&local->dynamic_ps_enable_work);
1162 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1163 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1164 config_changed |= IEEE80211_CONF_CHANGE_PS;
1167 ieee80211_hw_config(local, config_changed);
1168 ieee80211_bss_info_change_notify(sdata, changed);
1172 sta = sta_info_get(local, ifmgd->bssid);
1178 sta_info_unlink(&sta);
1182 sta_info_destroy(sta);
1185 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1187 if (!sdata || !sdata->default_key ||
1188 sdata->default_key->conf.alg != ALG_WEP)
1193 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1195 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1196 struct ieee80211_local *local = sdata->local;
1197 struct ieee80211_bss *bss;
1200 int privacy_invoked;
1202 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1205 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1206 local->hw.conf.channel->center_freq,
1207 ifmgd->ssid, ifmgd->ssid_len);
1211 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1212 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1213 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1215 ieee80211_rx_bss_put(local, bss);
1217 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1223 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1225 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1226 struct ieee80211_local *local = sdata->local;
1228 ifmgd->assoc_tries++;
1229 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1230 printk(KERN_DEBUG "%s: association with AP %pM"
1232 sdata->dev->name, ifmgd->bssid);
1233 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1234 ieee80211_recalc_idle(local);
1235 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
1236 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1237 sdata->local->hw.conf.channel->center_freq,
1238 ifmgd->ssid, ifmgd->ssid_len);
1240 * We might have a pending scan which had no chance to run yet
1241 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1242 * Hence, queue the STAs work again
1244 queue_work(local->hw.workqueue, &ifmgd->work);
1248 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1249 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1250 sdata->dev->name, ifmgd->bssid);
1251 if (ieee80211_privacy_mismatch(sdata)) {
1252 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1253 "mixed-cell disabled - abort association\n", sdata->dev->name);
1254 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1255 ieee80211_recalc_idle(local);
1259 ieee80211_send_assoc(sdata);
1261 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1264 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1265 struct ieee80211_hdr *hdr)
1268 * We can postpone the mgd.timer whenever receiving unicast frames
1269 * from AP because we know that the connection is working both ways
1270 * at that time. But multicast frames (and hence also beacons) must
1271 * be ignored here, because we need to trigger the timer during
1272 * data idle periods for sending the periodical probe request to
1275 if (!is_multicast_ether_addr(hdr->addr1))
1276 mod_timer(&sdata->u.mgd.timer,
1277 jiffies + IEEE80211_MONITORING_INTERVAL);
1280 void ieee80211_beacon_loss_work(struct work_struct *work)
1282 struct ieee80211_sub_if_data *sdata =
1283 container_of(work, struct ieee80211_sub_if_data,
1284 u.mgd.beacon_loss_work);
1285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1288 * The driver has already reported this event and we have
1289 * already sent a probe request. Maybe the AP died and the
1290 * driver keeps reporting until we disassociate... We have
1291 * to ignore that because otherwise we would continually
1292 * reset the timer and never check whether we received a
1295 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1298 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1299 if (net_ratelimit()) {
1300 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1301 "- sending probe request\n", sdata->dev->name,
1302 sdata->u.mgd.bssid);
1306 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1307 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1308 ifmgd->ssid_len, NULL, 0);
1310 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1313 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1315 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1317 queue_work(sdata->local->hw.workqueue,
1318 &sdata->u.mgd.beacon_loss_work);
1320 EXPORT_SYMBOL(ieee80211_beacon_loss);
1322 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1325 struct ieee80211_local *local = sdata->local;
1326 struct sta_info *sta;
1327 bool disassoc = false;
1329 /* TODO: start monitoring current AP signal quality and number of
1330 * missed beacons. Scan other channels every now and then and search
1331 * for better APs. */
1332 /* TODO: remove expired BSSes */
1334 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1338 sta = sta_info_get(local, ifmgd->bssid);
1340 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1341 sdata->dev->name, ifmgd->bssid);
1346 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1347 time_after(jiffies, sta->last_rx + IEEE80211_PROBE_WAIT)) {
1348 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1349 "- disassociating\n",
1350 sdata->dev->name, ifmgd->bssid);
1352 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1357 * Beacon filtering is only enabled with power save and then the
1358 * stack should not check for beacon loss.
1360 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1361 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1363 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1364 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1365 if (net_ratelimit()) {
1366 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1367 "- sending probe request\n",
1368 sdata->dev->name, ifmgd->bssid);
1371 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1372 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1373 ifmgd->ssid_len, NULL, 0);
1378 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1379 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1380 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1381 ifmgd->ssid_len, NULL, 0);
1388 ieee80211_set_disassoc(sdata, true, true,
1389 WLAN_REASON_PREV_AUTH_NOT_VALID);
1391 mod_timer(&ifmgd->timer, jiffies +
1392 IEEE80211_MONITORING_INTERVAL);
1396 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1398 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1400 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1401 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1402 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1403 /* Wait for SME to request association */
1404 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1405 ieee80211_recalc_idle(sdata->local);
1407 ieee80211_associate(sdata);
1411 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1412 struct ieee80211_mgmt *mgmt,
1416 struct ieee802_11_elems elems;
1418 pos = mgmt->u.auth.variable;
1419 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1420 if (!elems.challenge)
1422 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1423 elems.challenge - 2, elems.challenge_len + 2,
1424 sdata->u.mgd.bssid, 1);
1425 sdata->u.mgd.auth_transaction = 4;
1428 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1429 struct ieee80211_mgmt *mgmt,
1432 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1433 u16 auth_alg, auth_transaction, status_code;
1435 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1441 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1444 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1447 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1448 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1449 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1451 if (auth_alg != ifmgd->auth_alg ||
1452 auth_transaction != ifmgd->auth_transaction)
1455 if (status_code != WLAN_STATUS_SUCCESS) {
1456 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1458 const int num_algs = ARRAY_SIZE(algs);
1460 algs[0] = algs[1] = algs[2] = 0xff;
1461 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1462 algs[0] = WLAN_AUTH_OPEN;
1463 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1464 algs[1] = WLAN_AUTH_SHARED_KEY;
1465 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1466 algs[2] = WLAN_AUTH_LEAP;
1467 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1469 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1473 for (i = 0; i < num_algs; i++) {
1475 if (pos >= num_algs)
1477 if (algs[pos] == ifmgd->auth_alg ||
1480 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1481 !ieee80211_sta_wep_configured(sdata))
1483 ifmgd->auth_alg = algs[pos];
1490 switch (ifmgd->auth_alg) {
1491 case WLAN_AUTH_OPEN:
1492 case WLAN_AUTH_LEAP:
1494 ieee80211_auth_completed(sdata);
1495 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1497 case WLAN_AUTH_SHARED_KEY:
1498 if (ifmgd->auth_transaction == 4) {
1499 ieee80211_auth_completed(sdata);
1500 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1502 ieee80211_auth_challenge(sdata, mgmt, len);
1508 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1509 struct ieee80211_mgmt *mgmt,
1512 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1518 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1521 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1523 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1524 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1525 sdata->dev->name, reason_code);
1527 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1528 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1529 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1530 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1531 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1532 mod_timer(&ifmgd->timer, jiffies +
1533 IEEE80211_RETRY_AUTH_INTERVAL);
1536 ieee80211_set_disassoc(sdata, true, false, 0);
1537 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1538 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
1542 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1543 struct ieee80211_mgmt *mgmt,
1546 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1552 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1555 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1557 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1558 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1559 sdata->dev->name, reason_code);
1561 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1562 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1563 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1564 mod_timer(&ifmgd->timer, jiffies +
1565 IEEE80211_RETRY_AUTH_INTERVAL);
1568 ieee80211_set_disassoc(sdata, false, false, reason_code);
1569 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
1573 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1574 struct ieee80211_mgmt *mgmt,
1578 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1579 struct ieee80211_local *local = sdata->local;
1580 struct ieee80211_supported_band *sband;
1581 struct sta_info *sta;
1582 u32 rates, basic_rates;
1583 u16 capab_info, status_code, aid;
1584 struct ieee802_11_elems elems;
1585 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1589 bool have_higher_than_11mbit = false, newsta = false;
1590 u16 ap_ht_cap_flags;
1592 /* AssocResp and ReassocResp have identical structure, so process both
1593 * of them in this function. */
1595 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1601 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1604 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1605 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1606 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1608 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1609 "status=%d aid=%d)\n",
1610 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1611 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1613 pos = mgmt->u.assoc_resp.variable;
1614 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1616 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1617 elems.timeout_int && elems.timeout_int_len == 5 &&
1618 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1620 tu = get_unaligned_le32(elems.timeout_int + 1);
1621 ms = tu * 1024 / 1000;
1622 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1623 "comeback duration %u TU (%u ms)\n",
1624 sdata->dev->name, tu, ms);
1625 if (ms > IEEE80211_ASSOC_TIMEOUT)
1626 mod_timer(&ifmgd->timer,
1627 jiffies + msecs_to_jiffies(ms));
1631 if (status_code != WLAN_STATUS_SUCCESS) {
1632 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1633 sdata->dev->name, status_code);
1634 /* if this was a reassociation, ensure we try a "full"
1635 * association next time. This works around some broken APs
1636 * which do not correctly reject reassociation requests. */
1637 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1638 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1639 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1640 /* Wait for SME to decide what to do next */
1641 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1642 ieee80211_recalc_idle(local);
1647 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1648 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1649 "set\n", sdata->dev->name, aid);
1650 aid &= ~(BIT(15) | BIT(14));
1652 if (!elems.supp_rates) {
1653 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1658 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1660 ifmgd->ap_capab = capab_info;
1662 kfree(ifmgd->assocresp_ies);
1663 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1664 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1665 if (ifmgd->assocresp_ies)
1666 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1670 /* Add STA entry for the AP */
1671 sta = sta_info_get(local, ifmgd->bssid);
1675 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1677 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1678 " the AP\n", sdata->dev->name);
1683 /* update new sta with its last rx activity */
1684 sta->last_rx = jiffies;
1688 * FIXME: Do we really need to update the sta_info's information here?
1689 * We already know about the AP (we found it in our list) so it
1690 * should already be filled with the right info, no?
1691 * As is stands, all this is racy because typically we assume
1692 * the information that is filled in here (except flags) doesn't
1693 * change while a STA structure is alive. As such, it should move
1694 * to between the sta_info_alloc() and sta_info_insert() above.
1697 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP);
1698 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1699 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1703 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1705 for (i = 0; i < elems.supp_rates_len; i++) {
1706 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1707 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1710 have_higher_than_11mbit = true;
1712 for (j = 0; j < sband->n_bitrates; j++) {
1713 if (sband->bitrates[j].bitrate == rate) {
1716 basic_rates |= BIT(j);
1722 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1723 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1724 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1727 have_higher_than_11mbit = true;
1729 for (j = 0; j < sband->n_bitrates; j++) {
1730 if (sband->bitrates[j].bitrate == rate) {
1733 basic_rates |= BIT(j);
1739 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1740 sdata->vif.bss_conf.basic_rates = basic_rates;
1742 /* cf. IEEE 802.11 9.2.12 */
1743 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1744 have_higher_than_11mbit)
1745 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1747 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1749 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1750 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1751 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1752 elems.ht_cap_elem, &sta->sta.ht_cap);
1754 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1756 rate_control_rate_init(sta);
1758 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1759 set_sta_flags(sta, WLAN_STA_MFP);
1761 if (elems.wmm_param)
1762 set_sta_flags(sta, WLAN_STA_WME);
1765 int err = sta_info_insert(sta);
1767 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1768 " the AP (error %d)\n", sdata->dev->name, err);
1776 if (elems.wmm_param)
1777 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1778 elems.wmm_param_len);
1780 ieee80211_set_wmm_default(sdata);
1782 if (elems.ht_info_elem && elems.wmm_param &&
1783 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1784 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1785 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1788 /* set AID and assoc capability,
1789 * ieee80211_set_associated() will tell the driver */
1790 bss_conf->aid = aid;
1791 bss_conf->assoc_capability = capab_info;
1792 ieee80211_set_associated(sdata, changed);
1795 * initialise the time of last beacon to be the association time,
1796 * otherwise beacon loss check will trigger immediately
1798 ifmgd->last_beacon = jiffies;
1800 ieee80211_associated(sdata);
1801 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1805 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1806 struct ieee80211_mgmt *mgmt,
1808 struct ieee80211_rx_status *rx_status,
1809 struct ieee802_11_elems *elems,
1812 struct ieee80211_local *local = sdata->local;
1814 struct ieee80211_bss *bss;
1815 struct ieee80211_channel *channel;
1817 if (elems->ds_params && elems->ds_params_len == 1)
1818 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1820 freq = rx_status->freq;
1822 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1824 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1827 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1832 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1833 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1834 struct ieee80211_channel_sw_ie *sw_elem =
1835 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1836 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1839 ieee80211_rx_bss_put(local, bss);
1843 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1844 struct ieee80211_mgmt *mgmt,
1846 struct ieee80211_rx_status *rx_status)
1848 struct ieee80211_if_managed *ifmgd;
1850 struct ieee802_11_elems elems;
1852 ifmgd = &sdata->u.mgd;
1854 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1855 return; /* ignore ProbeResp to foreign address */
1857 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1861 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1864 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1866 /* direct probe may be part of the association flow */
1867 if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
1868 printk(KERN_DEBUG "%s direct probe responded\n",
1870 ieee80211_authenticate(sdata);
1873 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1874 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1878 * This is the canonical list of information elements we care about,
1879 * the filter code also gives us all changes to the Microsoft OUI
1880 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1882 * We implement beacon filtering in software since that means we can
1883 * avoid processing the frame here and in cfg80211, and userspace
1884 * will not be able to tell whether the hardware supports it or not.
1886 * XXX: This list needs to be dynamic -- userspace needs to be able to
1887 * add items it requires. It also needs to be able to tell us to
1888 * look out for other vendor IEs.
1890 static const u64 care_about_ies =
1891 (1ULL << WLAN_EID_COUNTRY) |
1892 (1ULL << WLAN_EID_ERP_INFO) |
1893 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1894 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1895 (1ULL << WLAN_EID_HT_CAPABILITY) |
1896 (1ULL << WLAN_EID_HT_INFORMATION);
1898 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1899 struct ieee80211_mgmt *mgmt,
1901 struct ieee80211_rx_status *rx_status)
1903 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1905 struct ieee802_11_elems elems;
1906 struct ieee80211_local *local = sdata->local;
1908 bool erp_valid, directed_tim = false;
1912 /* Process beacon from the current BSS */
1913 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1917 if (rx_status->freq != local->hw.conf.channel->center_freq)
1920 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1921 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1924 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1925 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1926 if (net_ratelimit()) {
1927 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1928 "to a received beacon\n", sdata->dev->name);
1931 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1934 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1935 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1936 len - baselen, &elems,
1937 care_about_ies, ncrc);
1939 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1940 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1943 ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim));
1945 if (ncrc == ifmgd->beacon_crc)
1947 ifmgd->beacon_crc = ncrc;
1949 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1951 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1952 elems.wmm_param_len);
1954 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1956 if (local->hw.conf.dynamic_ps_timeout > 0) {
1957 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1958 ieee80211_hw_config(local,
1959 IEEE80211_CONF_CHANGE_PS);
1960 ieee80211_send_nullfunc(local, sdata, 0);
1962 local->pspolling = true;
1965 * Here is assumed that the driver will be
1966 * able to send ps-poll frame and receive a
1967 * response even though power save mode is
1968 * enabled, but some drivers might require
1969 * to disable power save here. This needs
1970 * to be investigated.
1972 ieee80211_send_pspoll(local, sdata);
1977 if (elems.erp_info && elems.erp_info_len >= 1) {
1979 erp_value = elems.erp_info[0];
1983 changed |= ieee80211_handle_bss_capability(sdata,
1984 le16_to_cpu(mgmt->u.beacon.capab_info),
1985 erp_valid, erp_value);
1988 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1989 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1990 struct sta_info *sta;
1991 struct ieee80211_supported_band *sband;
1992 u16 ap_ht_cap_flags;
1996 sta = sta_info_get(local, ifmgd->bssid);
2002 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2004 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
2005 elems.ht_cap_elem, &sta->sta.ht_cap);
2007 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2011 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
2015 if (elems.country_elem) {
2016 /* Note we are only reviewing this on beacons
2017 * for the BSSID we are associated to */
2018 regulatory_hint_11d(local->hw.wiphy,
2019 elems.country_elem, elems.country_elem_len);
2021 /* TODO: IBSS also needs this */
2022 if (elems.pwr_constr_elem)
2023 ieee80211_handle_pwr_constr(sdata,
2024 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2025 elems.pwr_constr_elem,
2026 elems.pwr_constr_elem_len);
2029 ieee80211_bss_info_change_notify(sdata, changed);
2032 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
2033 struct sk_buff *skb,
2034 struct ieee80211_rx_status *rx_status)
2036 struct ieee80211_local *local = sdata->local;
2037 struct ieee80211_mgmt *mgmt;
2041 return RX_DROP_MONITOR;
2043 mgmt = (struct ieee80211_mgmt *) skb->data;
2044 fc = le16_to_cpu(mgmt->frame_control);
2046 switch (fc & IEEE80211_FCTL_STYPE) {
2047 case IEEE80211_STYPE_PROBE_REQ:
2048 case IEEE80211_STYPE_PROBE_RESP:
2049 case IEEE80211_STYPE_BEACON:
2050 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2051 case IEEE80211_STYPE_AUTH:
2052 case IEEE80211_STYPE_ASSOC_RESP:
2053 case IEEE80211_STYPE_REASSOC_RESP:
2054 case IEEE80211_STYPE_DEAUTH:
2055 case IEEE80211_STYPE_DISASSOC:
2056 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
2057 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
2061 return RX_DROP_MONITOR;
2064 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2065 struct sk_buff *skb)
2067 struct ieee80211_rx_status *rx_status;
2068 struct ieee80211_mgmt *mgmt;
2071 rx_status = (struct ieee80211_rx_status *) skb->cb;
2072 mgmt = (struct ieee80211_mgmt *) skb->data;
2073 fc = le16_to_cpu(mgmt->frame_control);
2075 switch (fc & IEEE80211_FCTL_STYPE) {
2076 case IEEE80211_STYPE_PROBE_RESP:
2077 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
2080 case IEEE80211_STYPE_BEACON:
2081 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2084 case IEEE80211_STYPE_AUTH:
2085 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2087 case IEEE80211_STYPE_ASSOC_RESP:
2088 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
2090 case IEEE80211_STYPE_REASSOC_RESP:
2091 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
2093 case IEEE80211_STYPE_DEAUTH:
2094 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2096 case IEEE80211_STYPE_DISASSOC:
2097 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2104 static void ieee80211_sta_timer(unsigned long data)
2106 struct ieee80211_sub_if_data *sdata =
2107 (struct ieee80211_sub_if_data *) data;
2108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2109 struct ieee80211_local *local = sdata->local;
2111 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2112 queue_work(local->hw.workqueue, &ifmgd->work);
2115 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
2117 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2118 struct ieee80211_local *local = sdata->local;
2120 /* Reset own TSF to allow time synchronization work. */
2121 drv_reset_tsf(local);
2123 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
2126 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2127 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2128 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2129 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
2130 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2131 ifmgd->auth_alg = WLAN_AUTH_LEAP;
2132 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
2133 ifmgd->auth_alg = WLAN_AUTH_FT;
2135 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2136 ifmgd->auth_transaction = -1;
2137 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2138 ifmgd->assoc_scan_tries = 0;
2139 ifmgd->direct_probe_tries = 0;
2140 ifmgd->auth_tries = 0;
2141 ifmgd->assoc_tries = 0;
2142 netif_tx_stop_all_queues(sdata->dev);
2143 netif_carrier_off(sdata->dev);
2146 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2148 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2149 struct ieee80211_local *local = sdata->local;
2150 struct ieee80211_bss *bss;
2151 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2152 u8 ssid_len = ifmgd->ssid_len;
2153 u16 capa_mask = WLAN_CAPABILITY_ESS;
2154 u16 capa_val = WLAN_CAPABILITY_ESS;
2155 struct ieee80211_channel *chan = local->oper_channel;
2157 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2158 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2159 IEEE80211_STA_AUTO_BSSID_SEL |
2160 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2161 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2162 if (sdata->default_key)
2163 capa_val |= WLAN_CAPABILITY_PRIVACY;
2166 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2169 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2172 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2177 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2178 bssid, ssid, ssid_len,
2179 capa_mask, capa_val);
2182 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
2183 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2184 ieee80211_sta_set_ssid(sdata, bss->ssid,
2186 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2187 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2189 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2190 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2192 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2194 /* Send out direct probe if no probe resp was received or
2195 * the one we have is outdated
2197 if (!bss->last_probe_resp ||
2198 time_after(jiffies, bss->last_probe_resp
2199 + IEEE80211_SCAN_RESULT_EXPIRE))
2200 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2202 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2204 ieee80211_rx_bss_put(local, bss);
2205 ieee80211_sta_reset_auth(sdata);
2208 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2210 ifmgd->assoc_scan_tries++;
2212 ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2215 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2216 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2218 ifmgd->assoc_scan_tries = 0;
2219 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2220 ieee80211_recalc_idle(local);
2227 static void ieee80211_sta_work(struct work_struct *work)
2229 struct ieee80211_sub_if_data *sdata =
2230 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2231 struct ieee80211_local *local = sdata->local;
2232 struct ieee80211_if_managed *ifmgd;
2233 struct sk_buff *skb;
2235 if (!netif_running(sdata->dev))
2238 if (local->sw_scanning || local->hw_scanning)
2241 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2243 ifmgd = &sdata->u.mgd;
2245 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2246 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2248 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2249 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2250 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2251 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2252 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2253 round_jiffies_relative(0));
2257 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2258 if (ieee80211_sta_config_auth(sdata))
2260 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2261 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2264 ieee80211_recalc_idle(local);
2266 switch (ifmgd->state) {
2267 case IEEE80211_STA_MLME_DISABLED:
2269 case IEEE80211_STA_MLME_DIRECT_PROBE:
2270 ieee80211_direct_probe(sdata);
2272 case IEEE80211_STA_MLME_AUTHENTICATE:
2273 ieee80211_authenticate(sdata);
2275 case IEEE80211_STA_MLME_ASSOCIATE:
2276 ieee80211_associate(sdata);
2278 case IEEE80211_STA_MLME_ASSOCIATED:
2279 ieee80211_associated(sdata);
2286 if (ieee80211_privacy_mismatch(sdata)) {
2287 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2288 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2290 ieee80211_set_disassoc(sdata, false, true,
2291 WLAN_REASON_UNSPECIFIED);
2295 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2297 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2299 * Need to update last_beacon to avoid beacon loss
2302 sdata->u.mgd.last_beacon = jiffies;
2305 queue_work(sdata->local->hw.workqueue,
2306 &sdata->u.mgd.work);
2310 /* interface setup */
2311 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2313 struct ieee80211_if_managed *ifmgd;
2316 ifmgd = &sdata->u.mgd;
2317 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2318 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2319 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2320 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2321 (unsigned long) sdata);
2322 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2323 (unsigned long) sdata);
2324 skb_queue_head_init(&ifmgd->skb_queue);
2326 ifmgd->capab = WLAN_CAPABILITY_ESS;
2327 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2328 IEEE80211_AUTH_ALG_SHARED_KEY;
2329 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
2330 IEEE80211_STA_AUTO_BSSID_SEL |
2331 IEEE80211_STA_AUTO_CHANNEL_SEL;
2332 if (sdata->local->hw.queues >= 4)
2333 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2335 hw_flags = sdata->local->hw.flags;
2337 if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2338 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2339 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2343 /* configuration hooks */
2344 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2346 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2347 struct ieee80211_local *local = sdata->local;
2349 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2352 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
2353 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2354 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
2355 IEEE80211_STA_AUTO_SSID_SEL))) {
2357 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2358 ieee80211_set_disassoc(sdata, true, true,
2359 WLAN_REASON_DEAUTH_LEAVING);
2361 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2362 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2363 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2364 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2365 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2366 queue_work(local->hw.workqueue, &ifmgd->work);
2370 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2372 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2374 if (ifmgd->ssid_len)
2375 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2377 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2382 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2384 struct ieee80211_if_managed *ifmgd;
2386 if (len > IEEE80211_MAX_SSID_LEN)
2389 ifmgd = &sdata->u.mgd;
2391 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2393 * Do not use reassociation if SSID is changed (different ESS).
2395 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2396 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2397 memcpy(ifmgd->ssid, ssid, len);
2398 ifmgd->ssid_len = len;
2401 return ieee80211_sta_commit(sdata);
2404 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2406 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2407 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2408 *len = ifmgd->ssid_len;
2412 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2416 if (is_valid_ether_addr(bssid)) {
2417 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2418 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2420 memset(ifmgd->bssid, 0, ETH_ALEN);
2421 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2424 if (netif_running(sdata->dev))
2425 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2427 return ieee80211_sta_commit(sdata);
2430 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2431 const char *ie, size_t len)
2433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2435 kfree(ifmgd->extra_ie);
2437 ifmgd->extra_ie = NULL;
2438 ifmgd->extra_ie_len = 0;
2441 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2442 if (!ifmgd->extra_ie) {
2443 ifmgd->extra_ie_len = 0;
2446 memcpy(ifmgd->extra_ie, ie, len);
2447 ifmgd->extra_ie_len = len;
2451 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2453 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2454 sdata->dev->name, reason);
2456 ieee80211_set_disassoc(sdata, true, true, reason);
2460 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2462 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2464 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2465 sdata->dev->name, reason);
2467 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2470 ieee80211_set_disassoc(sdata, false, true, reason);
2474 /* scan finished notification */
2475 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2477 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2479 /* Restart STA timers */
2481 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2482 ieee80211_restart_sta_timer(sdata);
2486 int ieee80211_max_network_latency(struct notifier_block *nb,
2487 unsigned long data, void *dummy)
2489 s32 latency_usec = (s32) data;
2490 struct ieee80211_local *local =
2491 container_of(nb, struct ieee80211_local,
2492 network_latency_notifier);
2494 mutex_lock(&local->iflist_mtx);
2495 ieee80211_recalc_ps(local, latency_usec);
2496 mutex_unlock(&local->iflist_mtx);