2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/pm_qos_params.h>
21 #include <linux/crc32.h>
22 #include <net/mac80211.h>
23 #include <asm/unaligned.h>
25 #include "ieee80211_i.h"
26 #include "driver-ops.h"
30 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
31 #define IEEE80211_AUTH_MAX_TRIES 3
32 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
33 #define IEEE80211_ASSOC_MAX_TRIES 3
34 #define IEEE80211_MAX_PROBE_TRIES 5
37 * beacon loss detection timeout
38 * XXX: should depend on beacon interval
40 #define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
42 * Time the connection can be idle before we probe
43 * it to see if we can still talk to the AP.
45 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
47 * Time we wait for a probe response after sending
48 * a probe request because of beacon loss or for
49 * checking the connection still works.
51 #define IEEE80211_PROBE_WAIT (HZ / 2)
53 #define TMR_RUNNING_TIMER 0
54 #define TMR_RUNNING_CHANSW 1
57 * All cfg80211 functions have to be called outside a locked
58 * section so that they can acquire a lock themselves... This
59 * is much simpler than queuing up things in cfg80211, but we
60 * do need some indirection for that here.
63 /* no action required */
66 /* caller must call cfg80211_send_rx_auth() */
67 RX_MGMT_CFG80211_AUTH,
69 /* caller must call cfg80211_send_rx_assoc() */
70 RX_MGMT_CFG80211_ASSOC,
72 /* caller must call cfg80211_send_deauth() */
73 RX_MGMT_CFG80211_DEAUTH,
75 /* caller must call cfg80211_send_disassoc() */
76 RX_MGMT_CFG80211_DISASSOC,
78 /* caller must call cfg80211_auth_timeout() & free work */
79 RX_MGMT_CFG80211_AUTH_TO,
81 /* caller must call cfg80211_assoc_timeout() & free work */
82 RX_MGMT_CFG80211_ASSOC_TO,
86 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
88 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
92 * We can have multiple work items (and connection probing)
93 * scheduling this timer, but we need to take care to only
94 * reschedule it when it should fire _earlier_ than it was
95 * asked for before, or if it's not pending right now. This
96 * function ensures that. Note that it then is required to
97 * run this function for all timeouts after the first one
98 * has happened -- the work that runs from this timer will
101 static void run_again(struct ieee80211_if_managed *ifmgd,
102 unsigned long timeout)
104 ASSERT_MGD_MTX(ifmgd);
106 if (!timer_pending(&ifmgd->timer) ||
107 time_before(timeout, ifmgd->timer.expires))
108 mod_timer(&ifmgd->timer, timeout);
111 static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
113 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
116 mod_timer(&sdata->u.mgd.bcn_mon_timer,
117 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
120 static int ecw2cw(int ecw)
122 return (1 << ecw) - 1;
125 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
126 struct ieee80211_supported_band *sband,
132 for (i = 0; i < bss->supp_rates_len; i++) {
133 int rate = (bss->supp_rates[i] & 0x7F) * 5;
135 for (j = 0; j < sband->n_bitrates; j++)
136 if (sband->bitrates[j].bitrate == rate) {
147 * ieee80211_enable_ht should be called only after the operating band
148 * has been determined as ht configuration depends on the hw's
149 * HT abilities for a specific band.
151 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
152 struct ieee80211_ht_info *hti,
153 const u8 *bssid, u16 ap_ht_cap_flags)
155 struct ieee80211_local *local = sdata->local;
156 struct ieee80211_supported_band *sband;
157 struct sta_info *sta;
160 bool enable_ht = true, ht_changed;
161 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
163 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
165 /* HT is not supported */
166 if (!sband->ht_cap.ht_supported)
169 /* check that channel matches the right operating channel */
170 if (local->hw.conf.channel->center_freq !=
171 ieee80211_channel_to_frequency(hti->control_chan))
175 channel_type = NL80211_CHAN_HT20;
177 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
178 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
179 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
180 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
181 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
182 if (!(local->hw.conf.channel->flags &
183 IEEE80211_CHAN_NO_HT40PLUS))
184 channel_type = NL80211_CHAN_HT40PLUS;
186 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
187 if (!(local->hw.conf.channel->flags &
188 IEEE80211_CHAN_NO_HT40MINUS))
189 channel_type = NL80211_CHAN_HT40MINUS;
195 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
196 channel_type != local->hw.conf.channel_type;
198 local->oper_channel_type = channel_type;
201 /* channel_type change automatically detected */
202 ieee80211_hw_config(local, 0);
205 sta = sta_info_get(local, bssid);
207 rate_control_rate_update(local, sband, sta,
208 IEEE80211_RC_HT_CHANGED);
216 ht_opmode = le16_to_cpu(hti->operation_mode);
218 /* if bss configuration changed store the new one */
219 if (!sdata->ht_opmode_valid ||
220 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
221 changed |= BSS_CHANGED_HT;
222 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
223 sdata->ht_opmode_valid = true;
229 /* frame sending functions */
231 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
232 struct ieee80211_mgd_work *wk)
234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
235 struct ieee80211_local *local = sdata->local;
237 struct ieee80211_mgmt *mgmt;
239 const u8 *ies, *ht_ie;
240 int i, len, count, rates_len, supp_rates_len;
243 struct ieee80211_supported_band *sband;
246 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
247 sizeof(*mgmt) + 200 + wk->ie_len +
250 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
251 "frame\n", sdata->dev->name);
254 skb_reserve(skb, local->hw.extra_tx_headroom);
256 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
258 capab = ifmgd->capab;
260 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
261 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
262 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
263 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
264 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
267 if (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
268 capab |= WLAN_CAPABILITY_PRIVACY;
269 if (wk->bss->wmm_used)
272 /* get all rates supported by the device and the AP as
273 * some APs don't like getting a superset of their rates
274 * in the association request (e.g. D-Link DAP 1353 in
276 rates_len = ieee80211_compatible_rates(wk->bss, sband, &rates);
278 if ((wk->bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
279 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
280 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
282 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
284 memcpy(mgmt->da, wk->bss->cbss.bssid, ETH_ALEN);
285 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
286 memcpy(mgmt->bssid, wk->bss->cbss.bssid, ETH_ALEN);
288 if (!is_zero_ether_addr(wk->prev_bssid)) {
290 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
291 IEEE80211_STYPE_REASSOC_REQ);
292 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
293 mgmt->u.reassoc_req.listen_interval =
294 cpu_to_le16(local->hw.conf.listen_interval);
295 memcpy(mgmt->u.reassoc_req.current_ap, wk->prev_bssid,
299 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
300 IEEE80211_STYPE_ASSOC_REQ);
301 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
302 mgmt->u.assoc_req.listen_interval =
303 cpu_to_le16(local->hw.conf.listen_interval);
307 ies = pos = skb_put(skb, 2 + wk->ssid_len);
308 *pos++ = WLAN_EID_SSID;
309 *pos++ = wk->ssid_len;
310 memcpy(pos, wk->ssid, wk->ssid_len);
312 /* add all rates which were marked to be used above */
313 supp_rates_len = rates_len;
314 if (supp_rates_len > 8)
317 len = sband->n_bitrates;
318 pos = skb_put(skb, supp_rates_len + 2);
319 *pos++ = WLAN_EID_SUPP_RATES;
320 *pos++ = supp_rates_len;
323 for (i = 0; i < sband->n_bitrates; i++) {
324 if (BIT(i) & rates) {
325 int rate = sband->bitrates[i].bitrate;
326 *pos++ = (u8) (rate / 5);
332 if (rates_len > count) {
333 pos = skb_put(skb, rates_len - count + 2);
334 *pos++ = WLAN_EID_EXT_SUPP_RATES;
335 *pos++ = rates_len - count;
337 for (i++; i < sband->n_bitrates; i++) {
338 if (BIT(i) & rates) {
339 int rate = sband->bitrates[i].bitrate;
340 *pos++ = (u8) (rate / 5);
345 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
346 /* 1. power capabilities */
347 pos = skb_put(skb, 4);
348 *pos++ = WLAN_EID_PWR_CAPABILITY;
350 *pos++ = 0; /* min tx power */
351 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
353 /* 2. supported channels */
354 /* TODO: get this in reg domain format */
355 pos = skb_put(skb, 2 * sband->n_channels + 2);
356 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
357 *pos++ = 2 * sband->n_channels;
358 for (i = 0; i < sband->n_channels; i++) {
359 *pos++ = ieee80211_frequency_to_channel(
360 sband->channels[i].center_freq);
361 *pos++ = 1; /* one channel in the subband*/
365 if (wk->ie_len && wk->ie) {
366 pos = skb_put(skb, wk->ie_len);
367 memcpy(pos, wk->ie, wk->ie_len);
370 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
371 pos = skb_put(skb, 9);
372 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
373 *pos++ = 7; /* len */
374 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
377 *pos++ = 2; /* WME */
378 *pos++ = 0; /* WME info */
379 *pos++ = 1; /* WME ver */
383 /* wmm support is a must to HT */
385 * IEEE802.11n does not allow TKIP/WEP as pairwise
386 * ciphers in HT mode. We still associate in non-ht
387 * mode (11a/b/g) if any one of these ciphers is
388 * configured as pairwise.
390 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
391 sband->ht_cap.ht_supported &&
392 (ht_ie = ieee80211_bss_get_ie(&wk->bss->cbss, WLAN_EID_HT_INFORMATION)) &&
393 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
394 (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
395 struct ieee80211_ht_info *ht_info =
396 (struct ieee80211_ht_info *)(ht_ie + 2);
397 u16 cap = sband->ht_cap.cap;
399 u32 flags = local->hw.conf.channel->flags;
401 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
402 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
403 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
404 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
405 cap &= ~IEEE80211_HT_CAP_SGI_40;
408 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
409 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
410 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
411 cap &= ~IEEE80211_HT_CAP_SGI_40;
416 tmp = cpu_to_le16(cap);
417 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
418 *pos++ = WLAN_EID_HT_CAPABILITY;
419 *pos++ = sizeof(struct ieee80211_ht_cap);
420 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
421 memcpy(pos, &tmp, sizeof(u16));
423 /* TODO: needs a define here for << 2 */
424 *pos++ = sband->ht_cap.ampdu_factor |
425 (sband->ht_cap.ampdu_density << 2);
426 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
429 ieee80211_tx_skb(sdata, skb, 0);
433 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
434 const u8 *bssid, u16 stype, u16 reason,
437 struct ieee80211_local *local = sdata->local;
438 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
440 struct ieee80211_mgmt *mgmt;
442 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
444 printk(KERN_DEBUG "%s: failed to allocate buffer for "
445 "deauth/disassoc frame\n", sdata->dev->name);
448 skb_reserve(skb, local->hw.extra_tx_headroom);
450 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
452 memcpy(mgmt->da, bssid, ETH_ALEN);
453 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
454 memcpy(mgmt->bssid, bssid, ETH_ALEN);
455 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
457 /* u.deauth.reason_code == u.disassoc.reason_code */
458 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
460 if (stype == IEEE80211_STYPE_DEAUTH)
462 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
464 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
467 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
469 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
470 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
473 void ieee80211_send_pspoll(struct ieee80211_local *local,
474 struct ieee80211_sub_if_data *sdata)
476 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
477 struct ieee80211_pspoll *pspoll;
481 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
483 printk(KERN_DEBUG "%s: failed to allocate buffer for "
484 "pspoll frame\n", sdata->dev->name);
487 skb_reserve(skb, local->hw.extra_tx_headroom);
489 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
490 memset(pspoll, 0, sizeof(*pspoll));
491 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
492 pspoll->frame_control = cpu_to_le16(fc);
493 pspoll->aid = cpu_to_le16(ifmgd->aid);
495 /* aid in PS-Poll has its two MSBs each set to 1 */
496 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
498 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
499 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
501 ieee80211_tx_skb(sdata, skb, 0);
504 void ieee80211_send_nullfunc(struct ieee80211_local *local,
505 struct ieee80211_sub_if_data *sdata,
509 struct ieee80211_hdr *nullfunc;
512 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
515 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
517 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
518 "frame\n", sdata->dev->name);
521 skb_reserve(skb, local->hw.extra_tx_headroom);
523 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
524 memset(nullfunc, 0, 24);
525 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
526 IEEE80211_FCTL_TODS);
528 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
529 nullfunc->frame_control = fc;
530 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
531 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
532 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
534 ieee80211_tx_skb(sdata, skb, 0);
537 /* spectrum management related things */
538 static void ieee80211_chswitch_work(struct work_struct *work)
540 struct ieee80211_sub_if_data *sdata =
541 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
542 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
544 if (!netif_running(sdata->dev))
547 mutex_lock(&ifmgd->mtx);
548 if (!ifmgd->associated)
551 sdata->local->oper_channel = sdata->local->csa_channel;
552 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
554 /* XXX: shouldn't really modify cfg80211-owned data! */
555 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
557 ieee80211_wake_queues_by_reason(&sdata->local->hw,
558 IEEE80211_QUEUE_STOP_REASON_CSA);
560 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
561 mutex_unlock(&ifmgd->mtx);
564 static void ieee80211_chswitch_timer(unsigned long data)
566 struct ieee80211_sub_if_data *sdata =
567 (struct ieee80211_sub_if_data *) data;
568 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
570 if (sdata->local->quiescing) {
571 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
575 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
578 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
579 struct ieee80211_channel_sw_ie *sw_elem,
580 struct ieee80211_bss *bss)
582 struct ieee80211_channel *new_ch;
583 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
584 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
586 ASSERT_MGD_MTX(ifmgd);
588 if (!ifmgd->associated)
591 if (sdata->local->scanning)
594 /* Disregard subsequent beacons if we are already running a timer
597 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
600 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
601 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
604 sdata->local->csa_channel = new_ch;
606 if (sw_elem->count <= 1) {
607 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
609 ieee80211_stop_queues_by_reason(&sdata->local->hw,
610 IEEE80211_QUEUE_STOP_REASON_CSA);
611 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
612 mod_timer(&ifmgd->chswitch_timer,
614 msecs_to_jiffies(sw_elem->count *
615 bss->cbss.beacon_interval));
619 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
620 u16 capab_info, u8 *pwr_constr_elem,
621 u8 pwr_constr_elem_len)
623 struct ieee80211_conf *conf = &sdata->local->hw.conf;
625 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
628 /* Power constraint IE length should be 1 octet */
629 if (pwr_constr_elem_len != 1)
632 if ((*pwr_constr_elem <= conf->channel->max_power) &&
633 (*pwr_constr_elem != sdata->local->power_constr_level)) {
634 sdata->local->power_constr_level = *pwr_constr_elem;
635 ieee80211_hw_config(sdata->local, 0);
640 static void ieee80211_enable_ps(struct ieee80211_local *local,
641 struct ieee80211_sub_if_data *sdata)
643 struct ieee80211_conf *conf = &local->hw.conf;
646 * If we are scanning right now then the parameters will
647 * take effect when scan finishes.
652 if (conf->dynamic_ps_timeout > 0 &&
653 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
654 mod_timer(&local->dynamic_ps_timer, jiffies +
655 msecs_to_jiffies(conf->dynamic_ps_timeout));
657 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
658 ieee80211_send_nullfunc(local, sdata, 1);
659 conf->flags |= IEEE80211_CONF_PS;
660 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
664 static void ieee80211_change_ps(struct ieee80211_local *local)
666 struct ieee80211_conf *conf = &local->hw.conf;
668 if (local->ps_sdata) {
669 ieee80211_enable_ps(local, local->ps_sdata);
670 } else if (conf->flags & IEEE80211_CONF_PS) {
671 conf->flags &= ~IEEE80211_CONF_PS;
672 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
673 del_timer_sync(&local->dynamic_ps_timer);
674 cancel_work_sync(&local->dynamic_ps_enable_work);
678 /* need to hold RTNL or interface lock */
679 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
681 struct ieee80211_sub_if_data *sdata, *found = NULL;
684 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
685 local->ps_sdata = NULL;
689 list_for_each_entry(sdata, &local->interfaces, list) {
690 if (!netif_running(sdata->dev))
692 if (sdata->vif.type != NL80211_IFTYPE_STATION)
698 if (count == 1 && found->u.mgd.powersave &&
699 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
700 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
701 IEEE80211_STA_CONNECTION_POLL))) {
705 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
707 beaconint_us = ieee80211_tu_to_usec(
708 found->vif.bss_conf.beacon_int);
710 if (beaconint_us > latency) {
711 local->ps_sdata = NULL;
713 u8 dtimper = found->vif.bss_conf.dtim_period;
717 maxslp = min_t(int, dtimper,
718 latency / beaconint_us);
720 local->hw.conf.max_sleep_period = maxslp;
721 local->ps_sdata = found;
724 local->ps_sdata = NULL;
727 ieee80211_change_ps(local);
730 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
732 struct ieee80211_local *local =
733 container_of(work, struct ieee80211_local,
734 dynamic_ps_disable_work);
736 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
737 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
738 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
741 ieee80211_wake_queues_by_reason(&local->hw,
742 IEEE80211_QUEUE_STOP_REASON_PS);
745 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
747 struct ieee80211_local *local =
748 container_of(work, struct ieee80211_local,
749 dynamic_ps_enable_work);
750 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
752 /* can only happen when PS was just disabled anyway */
756 if (local->hw.conf.flags & IEEE80211_CONF_PS)
759 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
760 ieee80211_send_nullfunc(local, sdata, 1);
762 local->hw.conf.flags |= IEEE80211_CONF_PS;
763 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
766 void ieee80211_dynamic_ps_timer(unsigned long data)
768 struct ieee80211_local *local = (void *) data;
770 if (local->quiescing || local->suspended)
773 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
777 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
778 struct ieee80211_if_managed *ifmgd,
779 u8 *wmm_param, size_t wmm_param_len)
781 struct ieee80211_tx_queue_params params;
786 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
792 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
794 count = wmm_param[6] & 0x0f;
795 if (count == ifmgd->wmm_last_param_set)
797 ifmgd->wmm_last_param_set = count;
800 left = wmm_param_len - 8;
802 memset(¶ms, 0, sizeof(params));
805 for (; left >= 4; left -= 4, pos += 4) {
806 int aci = (pos[0] >> 5) & 0x03;
807 int acm = (pos[0] >> 4) & 0x01;
814 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
819 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
824 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
830 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
834 params.aifs = pos[0] & 0x0f;
835 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
836 params.cw_min = ecw2cw(pos[1] & 0x0f);
837 params.txop = get_unaligned_le16(pos + 2);
838 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
839 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
840 "cWmin=%d cWmax=%d txop=%d\n",
841 wiphy_name(local->hw.wiphy), queue, aci, acm,
842 params.aifs, params.cw_min, params.cw_max, params.txop);
844 if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx)
845 printk(KERN_DEBUG "%s: failed to set TX queue "
846 "parameters for queue %d\n",
847 wiphy_name(local->hw.wiphy), queue);
851 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
852 u16 capab, bool erp_valid, u8 erp)
854 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
857 bool use_short_preamble;
861 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
862 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
864 use_protection = false;
865 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
868 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
870 if (use_protection != bss_conf->use_cts_prot) {
871 bss_conf->use_cts_prot = use_protection;
872 changed |= BSS_CHANGED_ERP_CTS_PROT;
875 if (use_short_preamble != bss_conf->use_short_preamble) {
876 bss_conf->use_short_preamble = use_short_preamble;
877 changed |= BSS_CHANGED_ERP_PREAMBLE;
880 if (use_short_slot != bss_conf->use_short_slot) {
881 bss_conf->use_short_slot = use_short_slot;
882 changed |= BSS_CHANGED_ERP_SLOT;
888 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
889 struct ieee80211_mgd_work *wk,
890 u32 bss_info_changed)
892 struct ieee80211_local *local = sdata->local;
893 struct ieee80211_bss *bss = wk->bss;
895 bss_info_changed |= BSS_CHANGED_ASSOC;
896 /* set timing information */
897 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
898 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
899 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
901 bss_info_changed |= BSS_CHANGED_BEACON_INT;
902 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
903 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
905 sdata->u.mgd.associated = bss;
906 sdata->u.mgd.old_associate_work = wk;
907 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
909 /* just to be sure */
910 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
911 IEEE80211_STA_BEACON_POLL);
913 ieee80211_led_assoc(local, 1);
915 sdata->vif.bss_conf.assoc = 1;
917 * For now just always ask the driver to update the basic rateset
918 * when we have associated, we aren't checking whether it actually
921 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
923 /* And the BSSID changed - we're associated now */
924 bss_info_changed |= BSS_CHANGED_BSSID;
926 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
928 mutex_lock(&local->iflist_mtx);
929 ieee80211_recalc_ps(local, -1);
930 mutex_unlock(&local->iflist_mtx);
932 netif_start_queue(sdata->dev);
933 netif_carrier_on(sdata->dev);
936 static enum rx_mgmt_action __must_check
937 ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
938 struct ieee80211_mgd_work *wk)
940 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
941 struct ieee80211_local *local = sdata->local;
944 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
945 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
946 sdata->dev->name, wk->bss->cbss.bssid);
949 * Most likely AP is not in the range so remove the
950 * bss struct for that AP.
952 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
955 * We might have a pending scan which had no chance to run yet
956 * due to work needing to be done. Hence, queue the STAs work
959 ieee80211_queue_work(&local->hw, &ifmgd->work);
960 return RX_MGMT_CFG80211_AUTH_TO;
963 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
964 sdata->dev->name, wk->bss->cbss.bssid,
968 * Direct probe is sent to broadcast address as some APs
969 * will not answer to direct packet in unassociated state.
971 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
973 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
974 run_again(ifmgd, wk->timeout);
980 static enum rx_mgmt_action __must_check
981 ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
982 struct ieee80211_mgd_work *wk)
984 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
985 struct ieee80211_local *local = sdata->local;
988 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
989 printk(KERN_DEBUG "%s: authentication with AP %pM"
991 sdata->dev->name, wk->bss->cbss.bssid);
994 * Most likely AP is not in the range so remove the
995 * bss struct for that AP.
997 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1000 * We might have a pending scan which had no chance to run yet
1001 * due to work needing to be done. Hence, queue the STAs work
1004 ieee80211_queue_work(&local->hw, &ifmgd->work);
1005 return RX_MGMT_CFG80211_AUTH_TO;
1008 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
1009 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1011 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
1012 wk->bss->cbss.bssid, NULL, 0, 0);
1013 wk->auth_transaction = 2;
1015 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
1016 run_again(ifmgd, wk->timeout);
1018 return RX_MGMT_NONE;
1021 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1025 struct ieee80211_local *local = sdata->local;
1026 struct sta_info *sta;
1027 u32 changed = 0, config_changed = 0;
1030 ASSERT_MGD_MTX(ifmgd);
1032 if (WARN_ON(!ifmgd->associated))
1035 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1037 ifmgd->associated = NULL;
1038 memset(ifmgd->bssid, 0, ETH_ALEN);
1041 kfree(ifmgd->old_associate_work);
1042 ifmgd->old_associate_work = NULL;
1044 struct ieee80211_mgd_work *wk = ifmgd->old_associate_work;
1046 wk->state = IEEE80211_MGD_STATE_IDLE;
1047 list_add(&wk->list, &ifmgd->work_list);
1051 * we need to commit the associated = NULL change because the
1052 * scan code uses that to determine whether this iface should
1053 * go to/wake up from powersave or not -- and could otherwise
1054 * wake the queues erroneously.
1059 * Thus, we can only afterwards stop the queues -- to account
1060 * for the case where another CPU is finishing a scan at this
1061 * time -- we don't want the scan code to enable queues.
1064 netif_stop_queue(sdata->dev);
1065 netif_carrier_off(sdata->dev);
1068 sta = sta_info_get(local, bssid);
1070 ieee80211_sta_tear_down_BA_sessions(sta);
1073 changed |= ieee80211_reset_erp_info(sdata);
1075 ieee80211_led_assoc(local, 0);
1076 changed |= BSS_CHANGED_ASSOC;
1077 sdata->vif.bss_conf.assoc = false;
1079 ieee80211_set_wmm_default(sdata);
1081 ieee80211_recalc_idle(local);
1083 /* channel(_type) changes are handled by ieee80211_hw_config */
1084 local->oper_channel_type = NL80211_CHAN_NO_HT;
1086 /* on the next assoc, re-program HT parameters */
1087 sdata->ht_opmode_valid = false;
1089 local->power_constr_level = 0;
1091 del_timer_sync(&local->dynamic_ps_timer);
1092 cancel_work_sync(&local->dynamic_ps_enable_work);
1094 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1095 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1096 config_changed |= IEEE80211_CONF_CHANGE_PS;
1099 ieee80211_hw_config(local, config_changed);
1101 /* And the BSSID changed -- not very interesting here */
1102 changed |= BSS_CHANGED_BSSID;
1103 ieee80211_bss_info_change_notify(sdata, changed);
1107 sta = sta_info_get(local, bssid);
1113 sta_info_unlink(&sta);
1117 sta_info_destroy(sta);
1120 static enum rx_mgmt_action __must_check
1121 ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1122 struct ieee80211_mgd_work *wk)
1124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1125 struct ieee80211_local *local = sdata->local;
1128 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
1129 printk(KERN_DEBUG "%s: association with AP %pM"
1131 sdata->dev->name, wk->bss->cbss.bssid);
1134 * Most likely AP is not in the range so remove the
1135 * bss struct for that AP.
1137 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1140 * We might have a pending scan which had no chance to run yet
1141 * due to work needing to be done. Hence, queue the STAs work
1144 ieee80211_queue_work(&local->hw, &ifmgd->work);
1145 return RX_MGMT_CFG80211_ASSOC_TO;
1148 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1149 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1150 ieee80211_send_assoc(sdata, wk);
1152 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
1153 run_again(ifmgd, wk->timeout);
1155 return RX_MGMT_NONE;
1158 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1159 struct ieee80211_hdr *hdr)
1162 * We can postpone the mgd.timer whenever receiving unicast frames
1163 * from AP because we know that the connection is working both ways
1164 * at that time. But multicast frames (and hence also beacons) must
1165 * be ignored here, because we need to trigger the timer during
1166 * data idle periods for sending the periodic probe request to the
1167 * AP we're connected to.
1169 if (is_multicast_ether_addr(hdr->addr1))
1172 mod_timer(&sdata->u.mgd.conn_mon_timer,
1173 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
1176 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1178 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1181 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1182 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1183 ssid + 2, ssid[1], NULL, 0);
1185 ifmgd->probe_send_count++;
1186 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1187 run_again(ifmgd, ifmgd->probe_timeout);
1190 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1193 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1194 bool already = false;
1196 if (!netif_running(sdata->dev))
1199 if (sdata->local->scanning)
1202 mutex_lock(&ifmgd->mtx);
1204 if (!ifmgd->associated)
1207 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1208 if (beacon && net_ratelimit())
1209 printk(KERN_DEBUG "%s: detected beacon loss from AP "
1210 "- sending probe request\n", sdata->dev->name);
1214 * The driver/our work has already reported this event or the
1215 * connection monitoring has kicked in and we have already sent
1216 * a probe request. Or maybe the AP died and the driver keeps
1217 * reporting until we disassociate...
1219 * In either case we have to ignore the current call to this
1220 * function (except for setting the correct probe reason bit)
1221 * because otherwise we would reset the timer every time and
1222 * never check whether we received a probe response!
1224 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1225 IEEE80211_STA_CONNECTION_POLL))
1229 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1231 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1236 mutex_lock(&sdata->local->iflist_mtx);
1237 ieee80211_recalc_ps(sdata->local, -1);
1238 mutex_unlock(&sdata->local->iflist_mtx);
1240 ifmgd->probe_send_count = 0;
1241 ieee80211_mgd_probe_ap_send(sdata);
1243 mutex_unlock(&ifmgd->mtx);
1246 void ieee80211_beacon_loss_work(struct work_struct *work)
1248 struct ieee80211_sub_if_data *sdata =
1249 container_of(work, struct ieee80211_sub_if_data,
1250 u.mgd.beacon_loss_work);
1252 ieee80211_mgd_probe_ap(sdata, true);
1255 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1257 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1259 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
1261 EXPORT_SYMBOL(ieee80211_beacon_loss);
1263 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1264 struct ieee80211_mgd_work *wk)
1266 wk->state = IEEE80211_MGD_STATE_IDLE;
1267 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1271 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1272 struct ieee80211_mgd_work *wk,
1273 struct ieee80211_mgmt *mgmt,
1277 struct ieee802_11_elems elems;
1279 pos = mgmt->u.auth.variable;
1280 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1281 if (!elems.challenge)
1283 ieee80211_send_auth(sdata, 3, wk->auth_alg,
1284 elems.challenge - 2, elems.challenge_len + 2,
1285 wk->bss->cbss.bssid,
1286 wk->key, wk->key_len, wk->key_idx);
1287 wk->auth_transaction = 4;
1290 static enum rx_mgmt_action __must_check
1291 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1292 struct ieee80211_mgd_work *wk,
1293 struct ieee80211_mgmt *mgmt, size_t len)
1295 u16 auth_alg, auth_transaction, status_code;
1297 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1298 return RX_MGMT_NONE;
1301 return RX_MGMT_NONE;
1303 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1304 return RX_MGMT_NONE;
1306 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1307 return RX_MGMT_NONE;
1309 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1310 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1311 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1313 if (auth_alg != wk->auth_alg ||
1314 auth_transaction != wk->auth_transaction)
1315 return RX_MGMT_NONE;
1317 if (status_code != WLAN_STATUS_SUCCESS) {
1318 list_del(&wk->list);
1320 return RX_MGMT_CFG80211_AUTH;
1323 switch (wk->auth_alg) {
1324 case WLAN_AUTH_OPEN:
1325 case WLAN_AUTH_LEAP:
1327 ieee80211_auth_completed(sdata, wk);
1328 return RX_MGMT_CFG80211_AUTH;
1329 case WLAN_AUTH_SHARED_KEY:
1330 if (wk->auth_transaction == 4) {
1331 ieee80211_auth_completed(sdata, wk);
1332 return RX_MGMT_CFG80211_AUTH;
1334 ieee80211_auth_challenge(sdata, wk, mgmt, len);
1338 return RX_MGMT_NONE;
1342 static enum rx_mgmt_action __must_check
1343 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1344 struct ieee80211_mgd_work *wk,
1345 struct ieee80211_mgmt *mgmt, size_t len)
1347 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1348 const u8 *bssid = NULL;
1352 return RX_MGMT_NONE;
1354 ASSERT_MGD_MTX(ifmgd);
1357 bssid = wk->bss->cbss.bssid;
1359 bssid = ifmgd->associated->cbss.bssid;
1361 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1363 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1364 sdata->dev->name, bssid, reason_code);
1367 ieee80211_set_disassoc(sdata, true);
1369 list_del(&wk->list);
1373 return RX_MGMT_CFG80211_DEAUTH;
1377 static enum rx_mgmt_action __must_check
1378 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1379 struct ieee80211_mgmt *mgmt, size_t len)
1381 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1385 return RX_MGMT_NONE;
1387 ASSERT_MGD_MTX(ifmgd);
1389 if (WARN_ON(!ifmgd->associated))
1390 return RX_MGMT_NONE;
1392 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1393 return RX_MGMT_NONE;
1395 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1397 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1398 sdata->dev->name, mgmt->sa, reason_code);
1400 ieee80211_set_disassoc(sdata, false);
1401 return RX_MGMT_CFG80211_DISASSOC;
1405 static enum rx_mgmt_action __must_check
1406 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1407 struct ieee80211_mgd_work *wk,
1408 struct ieee80211_mgmt *mgmt, size_t len,
1411 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1412 struct ieee80211_local *local = sdata->local;
1413 struct ieee80211_supported_band *sband;
1414 struct sta_info *sta;
1415 u32 rates, basic_rates;
1416 u16 capab_info, status_code, aid;
1417 struct ieee802_11_elems elems;
1418 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1422 bool have_higher_than_11mbit = false, newsta = false;
1423 u16 ap_ht_cap_flags;
1426 * AssocResp and ReassocResp have identical structure, so process both
1427 * of them in this function.
1431 return RX_MGMT_NONE;
1433 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1434 return RX_MGMT_NONE;
1436 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1437 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1438 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1440 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1441 "status=%d aid=%d)\n",
1442 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1443 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1445 pos = mgmt->u.assoc_resp.variable;
1446 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1448 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1449 elems.timeout_int && elems.timeout_int_len == 5 &&
1450 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1452 tu = get_unaligned_le32(elems.timeout_int + 1);
1453 ms = tu * 1024 / 1000;
1454 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1455 "comeback duration %u TU (%u ms)\n",
1456 sdata->dev->name, tu, ms);
1457 wk->timeout = jiffies + msecs_to_jiffies(ms);
1458 if (ms > IEEE80211_ASSOC_TIMEOUT)
1459 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
1460 return RX_MGMT_NONE;
1463 if (status_code != WLAN_STATUS_SUCCESS) {
1464 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1465 sdata->dev->name, status_code);
1466 wk->state = IEEE80211_MGD_STATE_IDLE;
1467 return RX_MGMT_CFG80211_ASSOC;
1470 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1471 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1472 "set\n", sdata->dev->name, aid);
1473 aid &= ~(BIT(15) | BIT(14));
1475 if (!elems.supp_rates) {
1476 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1478 return RX_MGMT_NONE;
1481 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1486 /* Add STA entry for the AP */
1487 sta = sta_info_get(local, wk->bss->cbss.bssid);
1493 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
1495 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1496 " the AP\n", sdata->dev->name);
1497 return RX_MGMT_NONE;
1500 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1502 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1503 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1510 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1512 for (i = 0; i < elems.supp_rates_len; i++) {
1513 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1514 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1517 have_higher_than_11mbit = true;
1519 for (j = 0; j < sband->n_bitrates; j++) {
1520 if (sband->bitrates[j].bitrate == rate) {
1523 basic_rates |= BIT(j);
1529 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1530 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1531 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1534 have_higher_than_11mbit = true;
1536 for (j = 0; j < sband->n_bitrates; j++) {
1537 if (sband->bitrates[j].bitrate == rate) {
1540 basic_rates |= BIT(j);
1546 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1547 sdata->vif.bss_conf.basic_rates = basic_rates;
1549 /* cf. IEEE 802.11 9.2.12 */
1550 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1551 have_higher_than_11mbit)
1552 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1554 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1556 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1557 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1558 elems.ht_cap_elem, &sta->sta.ht_cap);
1560 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1562 rate_control_rate_init(sta);
1564 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1565 set_sta_flags(sta, WLAN_STA_MFP);
1567 if (elems.wmm_param)
1568 set_sta_flags(sta, WLAN_STA_WME);
1571 int err = sta_info_insert(sta);
1573 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1574 " the AP (error %d)\n", sdata->dev->name, err);
1576 return RX_MGMT_NONE;
1582 if (elems.wmm_param)
1583 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1584 elems.wmm_param_len);
1586 ieee80211_set_wmm_default(sdata);
1588 if (elems.ht_info_elem && elems.wmm_param &&
1589 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1590 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1591 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1592 wk->bss->cbss.bssid,
1595 /* delete work item -- must be before set_associated for PS */
1596 list_del(&wk->list);
1598 /* set AID and assoc capability,
1599 * ieee80211_set_associated() will tell the driver */
1600 bss_conf->aid = aid;
1601 bss_conf->assoc_capability = capab_info;
1602 /* this will take ownership of wk */
1603 ieee80211_set_associated(sdata, wk, changed);
1606 * Start timer to probe the connection to the AP now.
1607 * Also start the timer that will detect beacon loss.
1609 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1610 mod_beacon_timer(sdata);
1612 return RX_MGMT_CFG80211_ASSOC;
1616 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1617 struct ieee80211_mgmt *mgmt,
1619 struct ieee80211_rx_status *rx_status,
1620 struct ieee802_11_elems *elems,
1623 struct ieee80211_local *local = sdata->local;
1625 struct ieee80211_bss *bss;
1626 struct ieee80211_channel *channel;
1628 if (elems->ds_params && elems->ds_params_len == 1)
1629 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1631 freq = rx_status->freq;
1633 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1635 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1638 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1641 ieee80211_rx_bss_put(local, bss);
1643 if (!sdata->u.mgd.associated)
1646 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1647 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1649 struct ieee80211_channel_sw_ie *sw_elem =
1650 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1651 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1656 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1657 struct ieee80211_mgd_work *wk,
1658 struct ieee80211_mgmt *mgmt, size_t len,
1659 struct ieee80211_rx_status *rx_status)
1661 struct ieee80211_if_managed *ifmgd;
1663 struct ieee802_11_elems elems;
1665 ifmgd = &sdata->u.mgd;
1667 ASSERT_MGD_MTX(ifmgd);
1669 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1670 return; /* ignore ProbeResp to foreign address */
1672 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1676 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1679 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1681 /* direct probe may be part of the association flow */
1682 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
1683 printk(KERN_DEBUG "%s: direct probe responded\n",
1686 wk->state = IEEE80211_MGD_STATE_AUTH;
1687 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
1690 if (ifmgd->associated &&
1691 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
1692 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1693 IEEE80211_STA_CONNECTION_POLL)) {
1694 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1695 IEEE80211_STA_BEACON_POLL);
1696 mutex_lock(&sdata->local->iflist_mtx);
1697 ieee80211_recalc_ps(sdata->local, -1);
1698 mutex_unlock(&sdata->local->iflist_mtx);
1700 * We've received a probe response, but are not sure whether
1701 * we have or will be receiving any beacons or data, so let's
1702 * schedule the timers again, just in case.
1704 mod_beacon_timer(sdata);
1705 mod_timer(&ifmgd->conn_mon_timer,
1706 round_jiffies_up(jiffies +
1707 IEEE80211_CONNECTION_IDLE_TIME));
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;
1747 ASSERT_MGD_MTX(ifmgd);
1749 /* Process beacon from the current BSS */
1750 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1754 if (rx_status->freq != local->hw.conf.channel->center_freq)
1758 * We might have received a number of frames, among them a
1759 * disassoc frame and a beacon...
1761 if (!ifmgd->associated)
1764 bssid = ifmgd->associated->cbss.bssid;
1767 * And in theory even frames from a different AP we were just
1768 * associated to a split-second ago!
1770 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1773 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1774 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1775 if (net_ratelimit()) {
1776 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1777 "to a received beacon\n", sdata->dev->name);
1780 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1781 mutex_lock(&local->iflist_mtx);
1782 ieee80211_recalc_ps(local, -1);
1783 mutex_unlock(&local->iflist_mtx);
1787 * Push the beacon loss detection into the future since
1788 * we are processing a beacon from the AP just now.
1790 mod_beacon_timer(sdata);
1792 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1793 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1794 len - baselen, &elems,
1795 care_about_ies, ncrc);
1797 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1798 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1801 if (ncrc != ifmgd->beacon_crc) {
1802 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1805 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1806 elems.wmm_param_len);
1809 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1811 if (local->hw.conf.dynamic_ps_timeout > 0) {
1812 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1813 ieee80211_hw_config(local,
1814 IEEE80211_CONF_CHANGE_PS);
1815 ieee80211_send_nullfunc(local, sdata, 0);
1817 local->pspolling = true;
1820 * Here is assumed that the driver will be
1821 * able to send ps-poll frame and receive a
1822 * response even though power save mode is
1823 * enabled, but some drivers might require
1824 * to disable power save here. This needs
1825 * to be investigated.
1827 ieee80211_send_pspoll(local, sdata);
1832 if (ncrc == ifmgd->beacon_crc)
1834 ifmgd->beacon_crc = ncrc;
1836 if (elems.erp_info && elems.erp_info_len >= 1) {
1838 erp_value = elems.erp_info[0];
1842 changed |= ieee80211_handle_bss_capability(sdata,
1843 le16_to_cpu(mgmt->u.beacon.capab_info),
1844 erp_valid, erp_value);
1847 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1848 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1849 struct sta_info *sta;
1850 struct ieee80211_supported_band *sband;
1851 u16 ap_ht_cap_flags;
1855 sta = sta_info_get(local, bssid);
1856 if (WARN_ON(!sta)) {
1861 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1863 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1864 elems.ht_cap_elem, &sta->sta.ht_cap);
1866 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1870 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1871 bssid, ap_ht_cap_flags);
1874 /* Note: country IE parsing is done for us by cfg80211 */
1875 if (elems.country_elem) {
1876 /* TODO: IBSS also needs this */
1877 if (elems.pwr_constr_elem)
1878 ieee80211_handle_pwr_constr(sdata,
1879 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1880 elems.pwr_constr_elem,
1881 elems.pwr_constr_elem_len);
1884 ieee80211_bss_info_change_notify(sdata, changed);
1887 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1888 struct sk_buff *skb)
1890 struct ieee80211_local *local = sdata->local;
1891 struct ieee80211_mgmt *mgmt;
1895 return RX_DROP_MONITOR;
1897 mgmt = (struct ieee80211_mgmt *) skb->data;
1898 fc = le16_to_cpu(mgmt->frame_control);
1900 switch (fc & IEEE80211_FCTL_STYPE) {
1901 case IEEE80211_STYPE_PROBE_REQ:
1902 case IEEE80211_STYPE_PROBE_RESP:
1903 case IEEE80211_STYPE_BEACON:
1904 case IEEE80211_STYPE_AUTH:
1905 case IEEE80211_STYPE_ASSOC_RESP:
1906 case IEEE80211_STYPE_REASSOC_RESP:
1907 case IEEE80211_STYPE_DEAUTH:
1908 case IEEE80211_STYPE_DISASSOC:
1909 case IEEE80211_STYPE_ACTION:
1910 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1911 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
1915 return RX_DROP_MONITOR;
1918 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1919 struct sk_buff *skb)
1921 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1922 struct ieee80211_rx_status *rx_status;
1923 struct ieee80211_mgmt *mgmt;
1924 struct ieee80211_mgd_work *wk;
1925 enum rx_mgmt_action rma = RX_MGMT_NONE;
1928 rx_status = (struct ieee80211_rx_status *) skb->cb;
1929 mgmt = (struct ieee80211_mgmt *) skb->data;
1930 fc = le16_to_cpu(mgmt->frame_control);
1932 mutex_lock(&ifmgd->mtx);
1934 if (ifmgd->associated &&
1935 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1937 switch (fc & IEEE80211_FCTL_STYPE) {
1938 case IEEE80211_STYPE_BEACON:
1939 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1942 case IEEE80211_STYPE_PROBE_RESP:
1943 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1944 skb->len, rx_status);
1946 case IEEE80211_STYPE_DEAUTH:
1947 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1950 case IEEE80211_STYPE_DISASSOC:
1951 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1953 case IEEE80211_STYPE_ACTION:
1954 /* XXX: differentiate, can only happen for CSA now! */
1955 ieee80211_sta_process_chanswitch(sdata,
1956 &mgmt->u.action.u.chan_switch.sw_elem,
1960 mutex_unlock(&ifmgd->mtx);
1966 case RX_MGMT_CFG80211_DEAUTH:
1967 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1969 case RX_MGMT_CFG80211_DISASSOC:
1970 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
1973 WARN(1, "unexpected: %d", rma);
1978 list_for_each_entry(wk, &ifmgd->work_list, list) {
1979 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1982 switch (fc & IEEE80211_FCTL_STYPE) {
1983 case IEEE80211_STYPE_PROBE_RESP:
1984 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1987 case IEEE80211_STYPE_AUTH:
1988 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1990 case IEEE80211_STYPE_ASSOC_RESP:
1991 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1994 case IEEE80211_STYPE_REASSOC_RESP:
1995 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1998 case IEEE80211_STYPE_DEAUTH:
1999 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
2004 * We've processed this frame for that work, so it can't
2005 * belong to another work struct.
2006 * NB: this is also required for correctness because the
2007 * called functions can free 'wk', and for 'rma'!
2012 mutex_unlock(&ifmgd->mtx);
2018 case RX_MGMT_CFG80211_AUTH:
2019 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
2021 case RX_MGMT_CFG80211_ASSOC:
2022 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
2024 case RX_MGMT_CFG80211_DEAUTH:
2025 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2028 WARN(1, "unexpected: %d", rma);
2035 static void ieee80211_sta_timer(unsigned long data)
2037 struct ieee80211_sub_if_data *sdata =
2038 (struct ieee80211_sub_if_data *) data;
2039 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2040 struct ieee80211_local *local = sdata->local;
2042 if (local->quiescing) {
2043 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2047 ieee80211_queue_work(&local->hw, &ifmgd->work);
2050 static void ieee80211_sta_work(struct work_struct *work)
2052 struct ieee80211_sub_if_data *sdata =
2053 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2054 struct ieee80211_local *local = sdata->local;
2055 struct ieee80211_if_managed *ifmgd;
2056 struct sk_buff *skb;
2057 struct ieee80211_mgd_work *wk, *tmp;
2058 LIST_HEAD(free_work);
2059 enum rx_mgmt_action rma;
2060 bool anybusy = false;
2062 if (!netif_running(sdata->dev))
2065 if (local->scanning)
2068 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2072 * ieee80211_queue_work() should have picked up most cases,
2073 * here we'll pick the the rest.
2075 if (WARN(local->suspended, "STA MLME work scheduled while "
2076 "going to suspend\n"))
2079 ifmgd = &sdata->u.mgd;
2081 /* first process frames to avoid timing out while a frame is pending */
2082 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2083 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2085 /* then process the rest of the work */
2086 mutex_lock(&ifmgd->mtx);
2088 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2089 IEEE80211_STA_CONNECTION_POLL) &&
2090 ifmgd->associated) {
2093 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
2094 if (time_is_after_jiffies(ifmgd->probe_timeout))
2095 run_again(ifmgd, ifmgd->probe_timeout);
2097 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
2098 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2099 printk(KERN_DEBUG "No probe response from AP %pM"
2100 " after %dms, try %d\n", bssid,
2101 (1000 * IEEE80211_PROBE_WAIT)/HZ,
2102 ifmgd->probe_send_count);
2104 ieee80211_mgd_probe_ap_send(sdata);
2107 * We actually lost the connection ... or did we?
2110 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2111 IEEE80211_STA_BEACON_POLL);
2112 printk(KERN_DEBUG "No probe response from AP %pM"
2113 " after %dms, disconnecting.\n",
2114 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
2115 ieee80211_set_disassoc(sdata, true);
2116 mutex_unlock(&ifmgd->mtx);
2118 * must be outside lock due to cfg80211,
2119 * but that's not a problem.
2121 ieee80211_send_deauth_disassoc(sdata, bssid,
2122 IEEE80211_STYPE_DEAUTH,
2123 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2125 mutex_lock(&ifmgd->mtx);
2130 ieee80211_recalc_idle(local);
2132 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
2133 if (time_is_after_jiffies(wk->timeout)) {
2135 * This work item isn't supposed to be worked on
2136 * right now, but take care to adjust the timer
2139 run_again(ifmgd, wk->timeout);
2143 switch (wk->state) {
2147 case IEEE80211_MGD_STATE_IDLE:
2151 case IEEE80211_MGD_STATE_PROBE:
2152 rma = ieee80211_direct_probe(sdata, wk);
2154 case IEEE80211_MGD_STATE_AUTH:
2155 rma = ieee80211_authenticate(sdata, wk);
2157 case IEEE80211_MGD_STATE_ASSOC:
2158 rma = ieee80211_associate(sdata, wk);
2164 /* no action required */
2166 case RX_MGMT_CFG80211_AUTH_TO:
2167 case RX_MGMT_CFG80211_ASSOC_TO:
2168 list_del(&wk->list);
2169 list_add(&wk->list, &free_work);
2170 wk->tries = rma; /* small abuse but only local */
2173 WARN(1, "unexpected: %d", rma);
2177 list_for_each_entry(wk, &ifmgd->work_list, list) {
2178 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
2184 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
2185 ieee80211_queue_delayed_work(&local->hw,
2187 round_jiffies_relative(0));
2189 mutex_unlock(&ifmgd->mtx);
2191 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2192 switch (wk->tries) {
2193 case RX_MGMT_CFG80211_AUTH_TO:
2194 cfg80211_send_auth_timeout(sdata->dev,
2195 wk->bss->cbss.bssid);
2197 case RX_MGMT_CFG80211_ASSOC_TO:
2198 cfg80211_send_assoc_timeout(sdata->dev,
2199 wk->bss->cbss.bssid);
2202 WARN(1, "unexpected: %d", wk->tries);
2205 list_del(&wk->list);
2209 ieee80211_recalc_idle(local);
2212 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2214 struct ieee80211_sub_if_data *sdata =
2215 (struct ieee80211_sub_if_data *) data;
2216 struct ieee80211_local *local = sdata->local;
2218 if (local->quiescing)
2221 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
2224 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2226 struct ieee80211_sub_if_data *sdata =
2227 (struct ieee80211_sub_if_data *) data;
2228 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2229 struct ieee80211_local *local = sdata->local;
2231 if (local->quiescing)
2234 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2237 static void ieee80211_sta_monitor_work(struct work_struct *work)
2239 struct ieee80211_sub_if_data *sdata =
2240 container_of(work, struct ieee80211_sub_if_data,
2241 u.mgd.monitor_work);
2243 ieee80211_mgd_probe_ap(sdata, false);
2246 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2248 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2249 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2250 IEEE80211_STA_CONNECTION_POLL);
2252 /* let's probe the connection once */
2253 ieee80211_queue_work(&sdata->local->hw,
2254 &sdata->u.mgd.monitor_work);
2255 /* and do all the other regular work too */
2256 ieee80211_queue_work(&sdata->local->hw,
2257 &sdata->u.mgd.work);
2262 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2264 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2267 * we need to use atomic bitops for the running bits
2268 * only because both timers might fire at the same
2269 * time -- the code here is properly synchronised.
2272 cancel_work_sync(&ifmgd->work);
2273 cancel_work_sync(&ifmgd->beacon_loss_work);
2274 if (del_timer_sync(&ifmgd->timer))
2275 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2277 cancel_work_sync(&ifmgd->chswitch_work);
2278 if (del_timer_sync(&ifmgd->chswitch_timer))
2279 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2281 cancel_work_sync(&ifmgd->monitor_work);
2282 /* these will just be re-established on connection */
2283 del_timer_sync(&ifmgd->conn_mon_timer);
2284 del_timer_sync(&ifmgd->bcn_mon_timer);
2287 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2291 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2292 add_timer(&ifmgd->timer);
2293 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2294 add_timer(&ifmgd->chswitch_timer);
2298 /* interface setup */
2299 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2301 struct ieee80211_if_managed *ifmgd;
2303 ifmgd = &sdata->u.mgd;
2304 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2305 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2306 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2307 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2308 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2309 (unsigned long) sdata);
2310 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2311 (unsigned long) sdata);
2312 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2313 (unsigned long) sdata);
2314 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2315 (unsigned long) sdata);
2316 skb_queue_head_init(&ifmgd->skb_queue);
2318 INIT_LIST_HEAD(&ifmgd->work_list);
2320 ifmgd->capab = WLAN_CAPABILITY_ESS;
2322 if (sdata->local->hw.queues >= 4)
2323 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2325 mutex_init(&ifmgd->mtx);
2328 /* scan finished notification */
2329 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2331 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2333 /* Restart STA timers */
2335 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2336 ieee80211_restart_sta_timer(sdata);
2340 int ieee80211_max_network_latency(struct notifier_block *nb,
2341 unsigned long data, void *dummy)
2343 s32 latency_usec = (s32) data;
2344 struct ieee80211_local *local =
2345 container_of(nb, struct ieee80211_local,
2346 network_latency_notifier);
2348 mutex_lock(&local->iflist_mtx);
2349 ieee80211_recalc_ps(local, latency_usec);
2350 mutex_unlock(&local->iflist_mtx);
2356 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2357 struct cfg80211_auth_request *req)
2359 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2361 struct ieee80211_mgd_work *wk;
2364 switch (req->auth_type) {
2365 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2366 auth_alg = WLAN_AUTH_OPEN;
2368 case NL80211_AUTHTYPE_SHARED_KEY:
2369 auth_alg = WLAN_AUTH_SHARED_KEY;
2371 case NL80211_AUTHTYPE_FT:
2372 auth_alg = WLAN_AUTH_FT;
2374 case NL80211_AUTHTYPE_NETWORK_EAP:
2375 auth_alg = WLAN_AUTH_LEAP;
2381 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2385 wk->bss = (void *)req->bss;
2387 if (req->ie && req->ie_len) {
2388 memcpy(wk->ie, req->ie, req->ie_len);
2389 wk->ie_len = req->ie_len;
2392 if (req->key && req->key_len) {
2393 wk->key_len = req->key_len;
2394 wk->key_idx = req->key_idx;
2395 memcpy(wk->key, req->key, req->key_len);
2398 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2399 memcpy(wk->ssid, ssid + 2, ssid[1]);
2400 wk->ssid_len = ssid[1];
2402 wk->state = IEEE80211_MGD_STATE_PROBE;
2403 wk->auth_alg = auth_alg;
2404 wk->timeout = jiffies; /* run right away */
2407 * XXX: if still associated need to tell AP that we're going
2408 * to sleep and then change channel etc.
2410 sdata->local->oper_channel = req->bss->channel;
2411 ieee80211_hw_config(sdata->local, 0);
2413 mutex_lock(&ifmgd->mtx);
2414 list_add(&wk->list, &sdata->u.mgd.work_list);
2415 mutex_unlock(&ifmgd->mtx);
2417 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
2421 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2422 struct cfg80211_assoc_request *req)
2424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2425 struct ieee80211_mgd_work *wk, *found = NULL;
2428 mutex_lock(&ifmgd->mtx);
2430 list_for_each_entry(wk, &ifmgd->work_list, list) {
2431 if (&wk->bss->cbss == req->bss &&
2432 wk->state == IEEE80211_MGD_STATE_IDLE) {
2443 list_del(&found->list);
2445 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2447 list_add(&found->list, &ifmgd->work_list);
2452 list_add(&wk->list, &ifmgd->work_list);
2454 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2456 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2457 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2458 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2459 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2460 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2462 sdata->local->oper_channel = req->bss->channel;
2463 ieee80211_hw_config(sdata->local, 0);
2465 if (req->ie && req->ie_len) {
2466 memcpy(wk->ie, req->ie, req->ie_len);
2467 wk->ie_len = req->ie_len;
2471 if (req->prev_bssid)
2472 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2474 wk->state = IEEE80211_MGD_STATE_ASSOC;
2476 wk->timeout = jiffies; /* run right away */
2479 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2480 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2482 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2483 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2486 if (req->crypto.control_port)
2487 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2489 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2491 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
2496 mutex_unlock(&ifmgd->mtx);
2500 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2501 struct cfg80211_deauth_request *req,
2504 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2505 struct ieee80211_mgd_work *wk;
2506 const u8 *bssid = NULL;
2508 mutex_lock(&ifmgd->mtx);
2510 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2511 bssid = req->bss->bssid;
2512 ieee80211_set_disassoc(sdata, true);
2513 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2514 if (&wk->bss->cbss == req->bss) {
2515 bssid = req->bss->bssid;
2516 list_del(&wk->list);
2523 * cfg80211 should catch this ... but it's racy since
2524 * we can receive a deauth frame, process it, hand it
2525 * to cfg80211 while that's in a locked section already
2526 * trying to tell us that the user wants to disconnect.
2529 mutex_unlock(&ifmgd->mtx);
2533 mutex_unlock(&ifmgd->mtx);
2535 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2536 sdata->dev->name, bssid, req->reason_code);
2538 ieee80211_send_deauth_disassoc(sdata, bssid,
2539 IEEE80211_STYPE_DEAUTH, req->reason_code,
2545 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2546 struct cfg80211_disassoc_request *req,
2549 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2551 mutex_lock(&ifmgd->mtx);
2554 * cfg80211 should catch this ... but it's racy since
2555 * we can receive a disassoc frame, process it, hand it
2556 * to cfg80211 while that's in a locked section already
2557 * trying to tell us that the user wants to disconnect.
2559 if (&ifmgd->associated->cbss != req->bss) {
2560 mutex_unlock(&ifmgd->mtx);
2564 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2565 sdata->dev->name, req->bss->bssid, req->reason_code);
2567 ieee80211_set_disassoc(sdata, false);
2569 mutex_unlock(&ifmgd->mtx);
2571 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2572 IEEE80211_STYPE_DISASSOC, req->reason_code,