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mac80211: fix WMM AP settings application
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / mlme.c
blobf13d181c0644642cdb632b859f7c54c03660868d
1 /*
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>
8 *
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.
12 */
13
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>
24
25 #include "ieee80211_i.h"
26 #include "driver-ops.h"
27 #include "rate.h"
28 #include "led.h"
29
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
35
36 /*
37 * beacon loss detection timeout
38 * XXX: should depend on beacon interval
39 */
40 #define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
41 /*
42 * Time the connection can be idle before we probe
43 * it to see if we can still talk to the AP.
44 */
45 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
46 /*
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.
50 */
51 #define IEEE80211_PROBE_WAIT (HZ / 2)
52
53 #define TMR_RUNNING_TIMER 0
54 #define TMR_RUNNING_CHANSW 1
55
56 /*
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.
61 */
62 enum rx_mgmt_action {
63 /* no action required */
64 RX_MGMT_NONE,
65
66 /* caller must call cfg80211_send_rx_auth() */
67 RX_MGMT_CFG80211_AUTH,
68
69 /* caller must call cfg80211_send_rx_assoc() */
70 RX_MGMT_CFG80211_ASSOC,
71
72 /* caller must call cfg80211_send_deauth() */
73 RX_MGMT_CFG80211_DEAUTH,
74
75 /* caller must call cfg80211_send_disassoc() */
76 RX_MGMT_CFG80211_DISASSOC,
77
78 /* caller must call cfg80211_auth_timeout() & free work */
79 RX_MGMT_CFG80211_AUTH_TO,
80
81 /* caller must call cfg80211_assoc_timeout() & free work */
82 RX_MGMT_CFG80211_ASSOC_TO,
83 };
84
85 /* utils */
86 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
87 {
88 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
89 }
90
91 /*
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
99 * do that.
100 */
101 static void run_again(struct ieee80211_if_managed *ifmgd,
102 unsigned long timeout)
103 {
104 ASSERT_MGD_MTX(ifmgd);
105
106 if (!timer_pending(&ifmgd->timer) ||
107 time_before(timeout, ifmgd->timer.expires))
108 mod_timer(&ifmgd->timer, timeout);
109 }
110
111 static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
112 {
113 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
114 return;
115
116 mod_timer(&sdata->u.mgd.bcn_mon_timer,
117 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
118 }
119
120 static int ecw2cw(int ecw)
121 {
122 return (1 << ecw) - 1;
123 }
124
125 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
126 struct ieee80211_supported_band *sband,
127 u32 *rates)
128 {
129 int i, j, count;
130 *rates = 0;
131 count = 0;
132 for (i = 0; i < bss->supp_rates_len; i++) {
133 int rate = (bss->supp_rates[i] & 0x7F) * 5;
134
135 for (j = 0; j < sband->n_bitrates; j++)
136 if (sband->bitrates[j].bitrate == rate) {
137 *rates |= BIT(j);
138 count++;
139 break;
140 }
141 }
142
143 return count;
144 }
145
146 /*
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.
150 */
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)
154 {
155 struct ieee80211_local *local = sdata->local;
156 struct ieee80211_supported_band *sband;
157 struct sta_info *sta;
158 u32 changed = 0;
159 u16 ht_opmode;
160 bool enable_ht = true, ht_changed;
161 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
162
163 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
164
165 /* HT is not supported */
166 if (!sband->ht_cap.ht_supported)
167 enable_ht = false;
168
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))
172 enable_ht = false;
173
174 if (enable_ht) {
175 channel_type = NL80211_CHAN_HT20;
176
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;
185 break;
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;
190 break;
191 }
192 }
193 }
194
195 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
196 channel_type != local->hw.conf.channel_type;
197
198 local->oper_channel_type = channel_type;
199
200 if (ht_changed) {
201 /* channel_type change automatically detected */
202 ieee80211_hw_config(local, 0);
203
204 rcu_read_lock();
205 sta = sta_info_get(local, bssid);
206 if (sta)
207 rate_control_rate_update(local, sband, sta,
208 IEEE80211_RC_HT_CHANGED);
209 rcu_read_unlock();
210 }
211
212 /* disable HT */
213 if (!enable_ht)
214 return 0;
215
216 ht_opmode = le16_to_cpu(hti->operation_mode);
217
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;
224 }
225
226 return changed;
227 }
228
229 /* frame sending functions */
230
231 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
232 struct ieee80211_mgd_work *wk)
233 {
234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
235 struct ieee80211_local *local = sdata->local;
236 struct sk_buff *skb;
237 struct ieee80211_mgmt *mgmt;
238 u8 *pos;
239 const u8 *ies, *ht_ie;
240 int i, len, count, rates_len, supp_rates_len;
241 u16 capab;
242 int wmm = 0;
243 struct ieee80211_supported_band *sband;
244 u32 rates = 0;
245
246 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
247 sizeof(*mgmt) + 200 + wk->ie_len +
248 wk->ssid_len);
249 if (!skb) {
250 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
251 "frame\n", sdata->dev->name);
252 return;
253 }
254 skb_reserve(skb, local->hw.extra_tx_headroom);
255
256 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
257
258 capab = ifmgd->capab;
259
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;
265 }
266
267 if (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
268 capab |= WLAN_CAPABILITY_PRIVACY;
269 if (wk->bss->wmm_used)
270 wmm = 1;
271
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
275 * b-only mode) */
276 rates_len = ieee80211_compatible_rates(wk->bss, sband, &rates);
277
278 if ((wk->bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
279 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
280 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
281
282 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
283 memset(mgmt, 0, 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);
287
288 if (!is_zero_ether_addr(wk->prev_bssid)) {
289 skb_put(skb, 10);
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,
296 ETH_ALEN);
297 } else {
298 skb_put(skb, 4);
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);
304 }
305
306 /* SSID */
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);
311
312 /* add all rates which were marked to be used above */
313 supp_rates_len = rates_len;
314 if (supp_rates_len > 8)
315 supp_rates_len = 8;
316
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;
321
322 count = 0;
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);
327 if (++count == 8)
328 break;
329 }
330 }
331
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;
336
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);
341 }
342 }
343 }
344
345 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
346 /* 1. power capabilities */
347 pos = skb_put(skb, 4);
348 *pos++ = WLAN_EID_PWR_CAPABILITY;
349 *pos++ = 2;
350 *pos++ = 0; /* min tx power */
351 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
352
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*/
362 }
363 }
364
365 if (wk->ie_len && wk->ie) {
366 pos = skb_put(skb, wk->ie_len);
367 memcpy(pos, wk->ie, wk->ie_len);
368 }
369
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 */
375 *pos++ = 0x50;
376 *pos++ = 0xf2;
377 *pos++ = 2; /* WME */
378 *pos++ = 0; /* WME info */
379 *pos++ = 1; /* WME ver */
380 *pos++ = 0;
381 }
382
383 /* wmm support is a must to HT */
384 /*
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.
389 */
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;
398 __le16 tmp;
399 u32 flags = local->hw.conf.channel->flags;
400
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;
406 }
407 break;
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;
412 }
413 break;
414 }
415
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));
422 pos += 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));
427 }
428
429 ieee80211_tx_skb(sdata, skb, 0);
430 }
431
432
433 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
434 const u8 *bssid, u16 stype, u16 reason,
435 void *cookie)
436 {
437 struct ieee80211_local *local = sdata->local;
438 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
439 struct sk_buff *skb;
440 struct ieee80211_mgmt *mgmt;
441
442 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
443 if (!skb) {
444 printk(KERN_DEBUG "%s: failed to allocate buffer for "
445 "deauth/disassoc frame\n", sdata->dev->name);
446 return;
447 }
448 skb_reserve(skb, local->hw.extra_tx_headroom);
449
450 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
451 memset(mgmt, 0, 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);
456 skb_put(skb, 2);
457 /* u.deauth.reason_code == u.disassoc.reason_code */
458 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
459
460 if (stype == IEEE80211_STYPE_DEAUTH)
461 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, cookie);
462 else
463 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len, cookie);
464 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
465 }
466
467 void ieee80211_send_pspoll(struct ieee80211_local *local,
468 struct ieee80211_sub_if_data *sdata)
469 {
470 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471 struct ieee80211_pspoll *pspoll;
472 struct sk_buff *skb;
473 u16 fc;
474
475 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
476 if (!skb) {
477 printk(KERN_DEBUG "%s: failed to allocate buffer for "
478 "pspoll frame\n", sdata->dev->name);
479 return;
480 }
481 skb_reserve(skb, local->hw.extra_tx_headroom);
482
483 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
484 memset(pspoll, 0, sizeof(*pspoll));
485 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
486 pspoll->frame_control = cpu_to_le16(fc);
487 pspoll->aid = cpu_to_le16(ifmgd->aid);
488
489 /* aid in PS-Poll has its two MSBs each set to 1 */
490 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
491
492 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
493 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
494
495 ieee80211_tx_skb(sdata, skb, 0);
496 }
497
498 void ieee80211_send_nullfunc(struct ieee80211_local *local,
499 struct ieee80211_sub_if_data *sdata,
500 int powersave)
501 {
502 struct sk_buff *skb;
503 struct ieee80211_hdr *nullfunc;
504 __le16 fc;
505
506 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
507 return;
508
509 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
510 if (!skb) {
511 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
512 "frame\n", sdata->dev->name);
513 return;
514 }
515 skb_reserve(skb, local->hw.extra_tx_headroom);
516
517 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
518 memset(nullfunc, 0, 24);
519 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
520 IEEE80211_FCTL_TODS);
521 if (powersave)
522 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
523 nullfunc->frame_control = fc;
524 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
525 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
526 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
527
528 ieee80211_tx_skb(sdata, skb, 0);
529 }
530
531 /* spectrum management related things */
532 static void ieee80211_chswitch_work(struct work_struct *work)
533 {
534 struct ieee80211_sub_if_data *sdata =
535 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
536 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
537
538 if (!netif_running(sdata->dev))
539 return;
540
541 mutex_lock(&ifmgd->mtx);
542 if (!ifmgd->associated)
543 goto out;
544
545 sdata->local->oper_channel = sdata->local->csa_channel;
546 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
547
548 /* XXX: shouldn't really modify cfg80211-owned data! */
549 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
550
551 ieee80211_wake_queues_by_reason(&sdata->local->hw,
552 IEEE80211_QUEUE_STOP_REASON_CSA);
553 out:
554 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
555 mutex_unlock(&ifmgd->mtx);
556 }
557
558 static void ieee80211_chswitch_timer(unsigned long data)
559 {
560 struct ieee80211_sub_if_data *sdata =
561 (struct ieee80211_sub_if_data *) data;
562 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
563
564 if (sdata->local->quiescing) {
565 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
566 return;
567 }
568
569 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
570 }
571
572 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
573 struct ieee80211_channel_sw_ie *sw_elem,
574 struct ieee80211_bss *bss)
575 {
576 struct ieee80211_channel *new_ch;
577 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
578 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
579
580 ASSERT_MGD_MTX(ifmgd);
581
582 if (!ifmgd->associated)
583 return;
584
585 if (sdata->local->scanning)
586 return;
587
588 /* Disregard subsequent beacons if we are already running a timer
589 processing a CSA */
590
591 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
592 return;
593
594 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
595 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
596 return;
597
598 sdata->local->csa_channel = new_ch;
599
600 if (sw_elem->count <= 1) {
601 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
602 } else {
603 ieee80211_stop_queues_by_reason(&sdata->local->hw,
604 IEEE80211_QUEUE_STOP_REASON_CSA);
605 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
606 mod_timer(&ifmgd->chswitch_timer,
607 jiffies +
608 msecs_to_jiffies(sw_elem->count *
609 bss->cbss.beacon_interval));
610 }
611 }
612
613 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
614 u16 capab_info, u8 *pwr_constr_elem,
615 u8 pwr_constr_elem_len)
616 {
617 struct ieee80211_conf *conf = &sdata->local->hw.conf;
618
619 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
620 return;
621
622 /* Power constraint IE length should be 1 octet */
623 if (pwr_constr_elem_len != 1)
624 return;
625
626 if ((*pwr_constr_elem <= conf->channel->max_power) &&
627 (*pwr_constr_elem != sdata->local->power_constr_level)) {
628 sdata->local->power_constr_level = *pwr_constr_elem;
629 ieee80211_hw_config(sdata->local, 0);
630 }
631 }
632
633 /* powersave */
634 static void ieee80211_enable_ps(struct ieee80211_local *local,
635 struct ieee80211_sub_if_data *sdata)
636 {
637 struct ieee80211_conf *conf = &local->hw.conf;
638
639 /*
640 * If we are scanning right now then the parameters will
641 * take effect when scan finishes.
642 */
643 if (local->scanning)
644 return;
645
646 if (conf->dynamic_ps_timeout > 0 &&
647 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
648 mod_timer(&local->dynamic_ps_timer, jiffies +
649 msecs_to_jiffies(conf->dynamic_ps_timeout));
650 } else {
651 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
652 ieee80211_send_nullfunc(local, sdata, 1);
653 conf->flags |= IEEE80211_CONF_PS;
654 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
655 }
656 }
657
658 static void ieee80211_change_ps(struct ieee80211_local *local)
659 {
660 struct ieee80211_conf *conf = &local->hw.conf;
661
662 if (local->ps_sdata) {
663 ieee80211_enable_ps(local, local->ps_sdata);
664 } else if (conf->flags & IEEE80211_CONF_PS) {
665 conf->flags &= ~IEEE80211_CONF_PS;
666 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
667 del_timer_sync(&local->dynamic_ps_timer);
668 cancel_work_sync(&local->dynamic_ps_enable_work);
669 }
670 }
671
672 /* need to hold RTNL or interface lock */
673 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
674 {
675 struct ieee80211_sub_if_data *sdata, *found = NULL;
676 int count = 0;
677
678 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
679 local->ps_sdata = NULL;
680 return;
681 }
682
683 list_for_each_entry(sdata, &local->interfaces, list) {
684 if (!netif_running(sdata->dev))
685 continue;
686 if (sdata->vif.type != NL80211_IFTYPE_STATION)
687 continue;
688 found = sdata;
689 count++;
690 }
691
692 if (count == 1 && found->u.mgd.powersave &&
693 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
694 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
695 IEEE80211_STA_CONNECTION_POLL))) {
696 s32 beaconint_us;
697
698 if (latency < 0)
699 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
700
701 beaconint_us = ieee80211_tu_to_usec(
702 found->vif.bss_conf.beacon_int);
703
704 if (beaconint_us > latency) {
705 local->ps_sdata = NULL;
706 } else {
707 u8 dtimper = found->vif.bss_conf.dtim_period;
708 int maxslp = 1;
709
710 if (dtimper > 1)
711 maxslp = min_t(int, dtimper,
712 latency / beaconint_us);
713
714 local->hw.conf.max_sleep_period = maxslp;
715 local->ps_sdata = found;
716 }
717 } else {
718 local->ps_sdata = NULL;
719 }
720
721 ieee80211_change_ps(local);
722 }
723
724 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
725 {
726 struct ieee80211_local *local =
727 container_of(work, struct ieee80211_local,
728 dynamic_ps_disable_work);
729
730 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
731 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
732 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
733 }
734
735 ieee80211_wake_queues_by_reason(&local->hw,
736 IEEE80211_QUEUE_STOP_REASON_PS);
737 }
738
739 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
740 {
741 struct ieee80211_local *local =
742 container_of(work, struct ieee80211_local,
743 dynamic_ps_enable_work);
744 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
745
746 /* can only happen when PS was just disabled anyway */
747 if (!sdata)
748 return;
749
750 if (local->hw.conf.flags & IEEE80211_CONF_PS)
751 return;
752
753 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
754 ieee80211_send_nullfunc(local, sdata, 1);
755
756 local->hw.conf.flags |= IEEE80211_CONF_PS;
757 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
758 }
759
760 void ieee80211_dynamic_ps_timer(unsigned long data)
761 {
762 struct ieee80211_local *local = (void *) data;
763
764 if (local->quiescing || local->suspended)
765 return;
766
767 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
768 }
769
770 /* MLME */
771 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
772 struct ieee80211_if_managed *ifmgd,
773 u8 *wmm_param, size_t wmm_param_len)
774 {
775 struct ieee80211_tx_queue_params params;
776 size_t left;
777 int count;
778 u8 *pos;
779
780 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
781 return;
782
783 if (!wmm_param)
784 return;
785
786 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
787 return;
788 count = wmm_param[6] & 0x0f;
789 if (count == ifmgd->wmm_last_param_set)
790 return;
791 ifmgd->wmm_last_param_set = count;
792
793 pos = wmm_param + 8;
794 left = wmm_param_len - 8;
795
796 memset(&params, 0, sizeof(params));
797
798 local->wmm_acm = 0;
799 for (; left >= 4; left -= 4, pos += 4) {
800 int aci = (pos[0] >> 5) & 0x03;
801 int acm = (pos[0] >> 4) & 0x01;
802 int queue;
803
804 switch (aci) {
805 case 1: /* AC_BK */
806 queue = 3;
807 if (acm)
808 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
809 break;
810 case 2: /* AC_VI */
811 queue = 1;
812 if (acm)
813 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
814 break;
815 case 3: /* AC_VO */
816 queue = 0;
817 if (acm)
818 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
819 break;
820 case 0: /* AC_BE */
821 default:
822 queue = 2;
823 if (acm)
824 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
825 break;
826 }
827
828 params.aifs = pos[0] & 0x0f;
829 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
830 params.cw_min = ecw2cw(pos[1] & 0x0f);
831 params.txop = get_unaligned_le16(pos + 2);
832 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
833 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
834 "cWmin=%d cWmax=%d txop=%d\n",
835 wiphy_name(local->hw.wiphy), queue, aci, acm,
836 params.aifs, params.cw_min, params.cw_max, params.txop);
837 #endif
838 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
839 printk(KERN_DEBUG "%s: failed to set TX queue "
840 "parameters for queue %d\n",
841 wiphy_name(local->hw.wiphy), queue);
842 }
843 }
844
845 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
846 u16 capab, bool erp_valid, u8 erp)
847 {
848 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
849 u32 changed = 0;
850 bool use_protection;
851 bool use_short_preamble;
852 bool use_short_slot;
853
854 if (erp_valid) {
855 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
856 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
857 } else {
858 use_protection = false;
859 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
860 }
861
862 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
863
864 if (use_protection != bss_conf->use_cts_prot) {
865 bss_conf->use_cts_prot = use_protection;
866 changed |= BSS_CHANGED_ERP_CTS_PROT;
867 }
868
869 if (use_short_preamble != bss_conf->use_short_preamble) {
870 bss_conf->use_short_preamble = use_short_preamble;
871 changed |= BSS_CHANGED_ERP_PREAMBLE;
872 }
873
874 if (use_short_slot != bss_conf->use_short_slot) {
875 bss_conf->use_short_slot = use_short_slot;
876 changed |= BSS_CHANGED_ERP_SLOT;
877 }
878
879 return changed;
880 }
881
882 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
883 struct ieee80211_mgd_work *wk,
884 u32 bss_info_changed)
885 {
886 struct ieee80211_local *local = sdata->local;
887 struct ieee80211_bss *bss = wk->bss;
888
889 bss_info_changed |= BSS_CHANGED_ASSOC;
890 /* set timing information */
891 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
892 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
893 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
894
895 bss_info_changed |= BSS_CHANGED_BEACON_INT;
896 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
897 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
898
899 sdata->u.mgd.associated = bss;
900 sdata->u.mgd.old_associate_work = wk;
901 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
902
903 /* just to be sure */
904 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
905 IEEE80211_STA_BEACON_POLL);
906
907 /*
908 * Always handle WMM once after association regardless
909 * of the first value the AP uses. Setting -1 here has
910 * that effect because the AP values is an unsigned
911 * 4-bit value.
912 */
913 sdata->u.mgd.wmm_last_param_set = -1;
914
915 ieee80211_led_assoc(local, 1);
916
917 sdata->vif.bss_conf.assoc = 1;
918 /*
919 * For now just always ask the driver to update the basic rateset
920 * when we have associated, we aren't checking whether it actually
921 * changed or not.
922 */
923 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
924
925 /* And the BSSID changed - we're associated now */
926 bss_info_changed |= BSS_CHANGED_BSSID;
927
928 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
929
930 mutex_lock(&local->iflist_mtx);
931 ieee80211_recalc_ps(local, -1);
932 mutex_unlock(&local->iflist_mtx);
933
934 netif_tx_start_all_queues(sdata->dev);
935 netif_carrier_on(sdata->dev);
936 }
937
938 static enum rx_mgmt_action __must_check
939 ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
940 struct ieee80211_mgd_work *wk)
941 {
942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
943 struct ieee80211_local *local = sdata->local;
944
945 wk->tries++;
946 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
947 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
948 sdata->dev->name, wk->bss->cbss.bssid);
949
950 /*
951 * Most likely AP is not in the range so remove the
952 * bss struct for that AP.
953 */
954 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
955
956 /*
957 * We might have a pending scan which had no chance to run yet
958 * due to work needing to be done. Hence, queue the STAs work
959 * again for that.
960 */
961 ieee80211_queue_work(&local->hw, &ifmgd->work);
962 return RX_MGMT_CFG80211_AUTH_TO;
963 }
964
965 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
966 sdata->dev->name, wk->bss->cbss.bssid,
967 wk->tries);
968
969 /*
970 * Direct probe is sent to broadcast address as some APs
971 * will not answer to direct packet in unassociated state.
972 */
973 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
974
975 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
976 run_again(ifmgd, wk->timeout);
977
978 return RX_MGMT_NONE;
979 }
980
981
982 static enum rx_mgmt_action __must_check
983 ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
984 struct ieee80211_mgd_work *wk)
985 {
986 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
987 struct ieee80211_local *local = sdata->local;
988
989 wk->tries++;
990 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
991 printk(KERN_DEBUG "%s: authentication with AP %pM"
992 " timed out\n",
993 sdata->dev->name, wk->bss->cbss.bssid);
994
995 /*
996 * Most likely AP is not in the range so remove the
997 * bss struct for that AP.
998 */
999 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1000
1001 /*
1002 * We might have a pending scan which had no chance to run yet
1003 * due to work needing to be done. Hence, queue the STAs work
1004 * again for that.
1005 */
1006 ieee80211_queue_work(&local->hw, &ifmgd->work);
1007 return RX_MGMT_CFG80211_AUTH_TO;
1008 }
1009
1010 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
1011 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1012
1013 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
1014 wk->bss->cbss.bssid, NULL, 0, 0);
1015 wk->auth_transaction = 2;
1016
1017 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
1018 run_again(ifmgd, wk->timeout);
1019
1020 return RX_MGMT_NONE;
1021 }
1022
1023 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1024 bool deauth)
1025 {
1026 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1027 struct ieee80211_local *local = sdata->local;
1028 struct sta_info *sta;
1029 u32 changed = 0, config_changed = 0;
1030 u8 bssid[ETH_ALEN];
1031
1032 ASSERT_MGD_MTX(ifmgd);
1033
1034 if (WARN_ON(!ifmgd->associated))
1035 return;
1036
1037 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1038
1039 ifmgd->associated = NULL;
1040 memset(ifmgd->bssid, 0, ETH_ALEN);
1041
1042 if (deauth) {
1043 kfree(ifmgd->old_associate_work);
1044 ifmgd->old_associate_work = NULL;
1045 } else {
1046 struct ieee80211_mgd_work *wk = ifmgd->old_associate_work;
1047
1048 wk->state = IEEE80211_MGD_STATE_IDLE;
1049 list_add(&wk->list, &ifmgd->work_list);
1050 }
1051
1052 /*
1053 * we need to commit the associated = NULL change because the
1054 * scan code uses that to determine whether this iface should
1055 * go to/wake up from powersave or not -- and could otherwise
1056 * wake the queues erroneously.
1057 */
1058 smp_mb();
1059
1060 /*
1061 * Thus, we can only afterwards stop the queues -- to account
1062 * for the case where another CPU is finishing a scan at this
1063 * time -- we don't want the scan code to enable queues.
1064 */
1065
1066 netif_tx_stop_all_queues(sdata->dev);
1067 netif_carrier_off(sdata->dev);
1068
1069 rcu_read_lock();
1070 sta = sta_info_get(local, bssid);
1071 if (sta)
1072 ieee80211_sta_tear_down_BA_sessions(sta);
1073 rcu_read_unlock();
1074
1075 changed |= ieee80211_reset_erp_info(sdata);
1076
1077 ieee80211_led_assoc(local, 0);
1078 changed |= BSS_CHANGED_ASSOC;
1079 sdata->vif.bss_conf.assoc = false;
1080
1081 ieee80211_set_wmm_default(sdata);
1082
1083 ieee80211_recalc_idle(local);
1084
1085 /* channel(_type) changes are handled by ieee80211_hw_config */
1086 local->oper_channel_type = NL80211_CHAN_NO_HT;
1087
1088 /* on the next assoc, re-program HT parameters */
1089 sdata->ht_opmode_valid = false;
1090
1091 local->power_constr_level = 0;
1092
1093 del_timer_sync(&local->dynamic_ps_timer);
1094 cancel_work_sync(&local->dynamic_ps_enable_work);
1095
1096 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1097 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1098 config_changed |= IEEE80211_CONF_CHANGE_PS;
1099 }
1100
1101 ieee80211_hw_config(local, config_changed);
1102
1103 /* And the BSSID changed -- not very interesting here */
1104 changed |= BSS_CHANGED_BSSID;
1105 ieee80211_bss_info_change_notify(sdata, changed);
1106
1107 rcu_read_lock();
1108
1109 sta = sta_info_get(local, bssid);
1110 if (!sta) {
1111 rcu_read_unlock();
1112 return;
1113 }
1114
1115 sta_info_unlink(&sta);
1116
1117 rcu_read_unlock();
1118
1119 sta_info_destroy(sta);
1120 }
1121
1122 static enum rx_mgmt_action __must_check
1123 ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1124 struct ieee80211_mgd_work *wk)
1125 {
1126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1127 struct ieee80211_local *local = sdata->local;
1128
1129 wk->tries++;
1130 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
1131 printk(KERN_DEBUG "%s: association with AP %pM"
1132 " timed out\n",
1133 sdata->dev->name, wk->bss->cbss.bssid);
1134
1135 /*
1136 * Most likely AP is not in the range so remove the
1137 * bss struct for that AP.
1138 */
1139 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1140
1141 /*
1142 * We might have a pending scan which had no chance to run yet
1143 * due to work needing to be done. Hence, queue the STAs work
1144 * again for that.
1145 */
1146 ieee80211_queue_work(&local->hw, &ifmgd->work);
1147 return RX_MGMT_CFG80211_ASSOC_TO;
1148 }
1149
1150 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1151 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1152 ieee80211_send_assoc(sdata, wk);
1153
1154 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
1155 run_again(ifmgd, wk->timeout);
1156
1157 return RX_MGMT_NONE;
1158 }
1159
1160 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1161 struct ieee80211_hdr *hdr)
1162 {
1163 /*
1164 * We can postpone the mgd.timer whenever receiving unicast frames
1165 * from AP because we know that the connection is working both ways
1166 * at that time. But multicast frames (and hence also beacons) must
1167 * be ignored here, because we need to trigger the timer during
1168 * data idle periods for sending the periodic probe request to the
1169 * AP we're connected to.
1170 */
1171 if (is_multicast_ether_addr(hdr->addr1))
1172 return;
1173
1174 mod_timer(&sdata->u.mgd.conn_mon_timer,
1175 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
1176 }
1177
1178 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1179 {
1180 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1181 const u8 *ssid;
1182
1183 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1184 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1185 ssid + 2, ssid[1], NULL, 0);
1186
1187 ifmgd->probe_send_count++;
1188 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1189 run_again(ifmgd, ifmgd->probe_timeout);
1190 }
1191
1192 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1193 bool beacon)
1194 {
1195 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1196 bool already = false;
1197
1198 if (!netif_running(sdata->dev))
1199 return;
1200
1201 if (sdata->local->scanning)
1202 return;
1203
1204 mutex_lock(&ifmgd->mtx);
1205
1206 if (!ifmgd->associated)
1207 goto out;
1208
1209 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1210 if (beacon && net_ratelimit())
1211 printk(KERN_DEBUG "%s: detected beacon loss from AP "
1212 "- sending probe request\n", sdata->dev->name);
1213 #endif
1214
1215 /*
1216 * The driver/our work has already reported this event or the
1217 * connection monitoring has kicked in and we have already sent
1218 * a probe request. Or maybe the AP died and the driver keeps
1219 * reporting until we disassociate...
1220 *
1221 * In either case we have to ignore the current call to this
1222 * function (except for setting the correct probe reason bit)
1223 * because otherwise we would reset the timer every time and
1224 * never check whether we received a probe response!
1225 */
1226 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1227 IEEE80211_STA_CONNECTION_POLL))
1228 already = true;
1229
1230 if (beacon)
1231 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1232 else
1233 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1234
1235 if (already)
1236 goto out;
1237
1238 mutex_lock(&sdata->local->iflist_mtx);
1239 ieee80211_recalc_ps(sdata->local, -1);
1240 mutex_unlock(&sdata->local->iflist_mtx);
1241
1242 ifmgd->probe_send_count = 0;
1243 ieee80211_mgd_probe_ap_send(sdata);
1244 out:
1245 mutex_unlock(&ifmgd->mtx);
1246 }
1247
1248 void ieee80211_beacon_loss_work(struct work_struct *work)
1249 {
1250 struct ieee80211_sub_if_data *sdata =
1251 container_of(work, struct ieee80211_sub_if_data,
1252 u.mgd.beacon_loss_work);
1253
1254 ieee80211_mgd_probe_ap(sdata, true);
1255 }
1256
1257 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1258 {
1259 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1260
1261 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
1262 }
1263 EXPORT_SYMBOL(ieee80211_beacon_loss);
1264
1265 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1266 struct ieee80211_mgd_work *wk)
1267 {
1268 wk->state = IEEE80211_MGD_STATE_IDLE;
1269 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1270 }
1271
1272
1273 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1274 struct ieee80211_mgd_work *wk,
1275 struct ieee80211_mgmt *mgmt,
1276 size_t len)
1277 {
1278 u8 *pos;
1279 struct ieee802_11_elems elems;
1280
1281 pos = mgmt->u.auth.variable;
1282 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1283 if (!elems.challenge)
1284 return;
1285 ieee80211_send_auth(sdata, 3, wk->auth_alg,
1286 elems.challenge - 2, elems.challenge_len + 2,
1287 wk->bss->cbss.bssid,
1288 wk->key, wk->key_len, wk->key_idx);
1289 wk->auth_transaction = 4;
1290 }
1291
1292 static enum rx_mgmt_action __must_check
1293 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1294 struct ieee80211_mgd_work *wk,
1295 struct ieee80211_mgmt *mgmt, size_t len)
1296 {
1297 u16 auth_alg, auth_transaction, status_code;
1298
1299 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1300 return RX_MGMT_NONE;
1301
1302 if (len < 24 + 6)
1303 return RX_MGMT_NONE;
1304
1305 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1306 return RX_MGMT_NONE;
1307
1308 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1309 return RX_MGMT_NONE;
1310
1311 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1312 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1313 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1314
1315 if (auth_alg != wk->auth_alg ||
1316 auth_transaction != wk->auth_transaction)
1317 return RX_MGMT_NONE;
1318
1319 if (status_code != WLAN_STATUS_SUCCESS) {
1320 list_del(&wk->list);
1321 kfree(wk);
1322 return RX_MGMT_CFG80211_AUTH;
1323 }
1324
1325 switch (wk->auth_alg) {
1326 case WLAN_AUTH_OPEN:
1327 case WLAN_AUTH_LEAP:
1328 case WLAN_AUTH_FT:
1329 ieee80211_auth_completed(sdata, wk);
1330 return RX_MGMT_CFG80211_AUTH;
1331 case WLAN_AUTH_SHARED_KEY:
1332 if (wk->auth_transaction == 4) {
1333 ieee80211_auth_completed(sdata, wk);
1334 return RX_MGMT_CFG80211_AUTH;
1335 } else
1336 ieee80211_auth_challenge(sdata, wk, mgmt, len);
1337 break;
1338 }
1339
1340 return RX_MGMT_NONE;
1341 }
1342
1343
1344 static enum rx_mgmt_action __must_check
1345 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1346 struct ieee80211_mgd_work *wk,
1347 struct ieee80211_mgmt *mgmt, size_t len)
1348 {
1349 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1350 const u8 *bssid = NULL;
1351 u16 reason_code;
1352
1353 if (len < 24 + 2)
1354 return RX_MGMT_NONE;
1355
1356 ASSERT_MGD_MTX(ifmgd);
1357
1358 if (wk)
1359 bssid = wk->bss->cbss.bssid;
1360 else
1361 bssid = ifmgd->associated->cbss.bssid;
1362
1363 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1364
1365 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1366 sdata->dev->name, bssid, reason_code);
1367
1368 if (!wk) {
1369 ieee80211_set_disassoc(sdata, true);
1370 } else {
1371 list_del(&wk->list);
1372 kfree(wk);
1373 }
1374
1375 return RX_MGMT_CFG80211_DEAUTH;
1376 }
1377
1378
1379 static enum rx_mgmt_action __must_check
1380 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1381 struct ieee80211_mgmt *mgmt, size_t len)
1382 {
1383 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1384 u16 reason_code;
1385
1386 if (len < 24 + 2)
1387 return RX_MGMT_NONE;
1388
1389 ASSERT_MGD_MTX(ifmgd);
1390
1391 if (WARN_ON(!ifmgd->associated))
1392 return RX_MGMT_NONE;
1393
1394 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1395 return RX_MGMT_NONE;
1396
1397 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1398
1399 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1400 sdata->dev->name, mgmt->sa, reason_code);
1401
1402 ieee80211_set_disassoc(sdata, false);
1403 return RX_MGMT_CFG80211_DISASSOC;
1404 }
1405
1406
1407 static enum rx_mgmt_action __must_check
1408 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1409 struct ieee80211_mgd_work *wk,
1410 struct ieee80211_mgmt *mgmt, size_t len,
1411 bool reassoc)
1412 {
1413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1414 struct ieee80211_local *local = sdata->local;
1415 struct ieee80211_supported_band *sband;
1416 struct sta_info *sta;
1417 u32 rates, basic_rates;
1418 u16 capab_info, status_code, aid;
1419 struct ieee802_11_elems elems;
1420 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1421 u8 *pos;
1422 u32 changed = 0;
1423 int i, j;
1424 bool have_higher_than_11mbit = false, newsta = false;
1425 u16 ap_ht_cap_flags;
1426
1427 /*
1428 * AssocResp and ReassocResp have identical structure, so process both
1429 * of them in this function.
1430 */
1431
1432 if (len < 24 + 6)
1433 return RX_MGMT_NONE;
1434
1435 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1436 return RX_MGMT_NONE;
1437
1438 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1439 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1440 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1441
1442 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1443 "status=%d aid=%d)\n",
1444 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1445 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1446
1447 pos = mgmt->u.assoc_resp.variable;
1448 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1449
1450 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1451 elems.timeout_int && elems.timeout_int_len == 5 &&
1452 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1453 u32 tu, ms;
1454 tu = get_unaligned_le32(elems.timeout_int + 1);
1455 ms = tu * 1024 / 1000;
1456 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1457 "comeback duration %u TU (%u ms)\n",
1458 sdata->dev->name, tu, ms);
1459 wk->timeout = jiffies + msecs_to_jiffies(ms);
1460 if (ms > IEEE80211_ASSOC_TIMEOUT)
1461 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
1462 return RX_MGMT_NONE;
1463 }
1464
1465 if (status_code != WLAN_STATUS_SUCCESS) {
1466 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1467 sdata->dev->name, status_code);
1468 wk->state = IEEE80211_MGD_STATE_IDLE;
1469 return RX_MGMT_CFG80211_ASSOC;
1470 }
1471
1472 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1473 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1474 "set\n", sdata->dev->name, aid);
1475 aid &= ~(BIT(15) | BIT(14));
1476
1477 if (!elems.supp_rates) {
1478 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1479 sdata->dev->name);
1480 return RX_MGMT_NONE;
1481 }
1482
1483 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1484 ifmgd->aid = aid;
1485
1486 rcu_read_lock();
1487
1488 /* Add STA entry for the AP */
1489 sta = sta_info_get(local, wk->bss->cbss.bssid);
1490 if (!sta) {
1491 newsta = true;
1492
1493 rcu_read_unlock();
1494
1495 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
1496 if (!sta) {
1497 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1498 " the AP\n", sdata->dev->name);
1499 return RX_MGMT_NONE;
1500 }
1501
1502 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1503 WLAN_STA_ASSOC_AP);
1504 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1505 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1506
1507 rcu_read_lock();
1508 }
1509
1510 rates = 0;
1511 basic_rates = 0;
1512 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1513
1514 for (i = 0; i < elems.supp_rates_len; i++) {
1515 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1516 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1517
1518 if (rate > 110)
1519 have_higher_than_11mbit = true;
1520
1521 for (j = 0; j < sband->n_bitrates; j++) {
1522 if (sband->bitrates[j].bitrate == rate) {
1523 rates |= BIT(j);
1524 if (is_basic)
1525 basic_rates |= BIT(j);
1526 break;
1527 }
1528 }
1529 }
1530
1531 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1532 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1533 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1534
1535 if (rate > 110)
1536 have_higher_than_11mbit = true;
1537
1538 for (j = 0; j < sband->n_bitrates; j++) {
1539 if (sband->bitrates[j].bitrate == rate) {
1540 rates |= BIT(j);
1541 if (is_basic)
1542 basic_rates |= BIT(j);
1543 break;
1544 }
1545 }
1546 }
1547
1548 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1549 sdata->vif.bss_conf.basic_rates = basic_rates;
1550
1551 /* cf. IEEE 802.11 9.2.12 */
1552 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1553 have_higher_than_11mbit)
1554 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1555 else
1556 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1557
1558 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1559 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1560 elems.ht_cap_elem, &sta->sta.ht_cap);
1561
1562 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1563
1564 rate_control_rate_init(sta);
1565
1566 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1567 set_sta_flags(sta, WLAN_STA_MFP);
1568
1569 if (elems.wmm_param)
1570 set_sta_flags(sta, WLAN_STA_WME);
1571
1572 if (newsta) {
1573 int err = sta_info_insert(sta);
1574 if (err) {
1575 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1576 " the AP (error %d)\n", sdata->dev->name, err);
1577 rcu_read_unlock();
1578 return RX_MGMT_NONE;
1579 }
1580 }
1581
1582 rcu_read_unlock();
1583
1584 if (elems.wmm_param)
1585 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1586 elems.wmm_param_len);
1587 else
1588 ieee80211_set_wmm_default(sdata);
1589
1590 if (elems.ht_info_elem && elems.wmm_param &&
1591 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1592 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1593 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1594 wk->bss->cbss.bssid,
1595 ap_ht_cap_flags);
1596
1597 /* delete work item -- must be before set_associated for PS */
1598 list_del(&wk->list);
1599
1600 /* set AID and assoc capability,
1601 * ieee80211_set_associated() will tell the driver */
1602 bss_conf->aid = aid;
1603 bss_conf->assoc_capability = capab_info;
1604 /* this will take ownership of wk */
1605 ieee80211_set_associated(sdata, wk, changed);
1606
1607 /*
1608 * Start timer to probe the connection to the AP now.
1609 * Also start the timer that will detect beacon loss.
1610 */
1611 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1612 mod_beacon_timer(sdata);
1613
1614 return RX_MGMT_CFG80211_ASSOC;
1615 }
1616
1617
1618 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1619 struct ieee80211_mgmt *mgmt,
1620 size_t len,
1621 struct ieee80211_rx_status *rx_status,
1622 struct ieee802_11_elems *elems,
1623 bool beacon)
1624 {
1625 struct ieee80211_local *local = sdata->local;
1626 int freq;
1627 struct ieee80211_bss *bss;
1628 struct ieee80211_channel *channel;
1629
1630 if (elems->ds_params && elems->ds_params_len == 1)
1631 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1632 else
1633 freq = rx_status->freq;
1634
1635 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1636
1637 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1638 return;
1639
1640 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1641 channel, beacon);
1642 if (bss)
1643 ieee80211_rx_bss_put(local, bss);
1644
1645 if (!sdata->u.mgd.associated)
1646 return;
1647
1648 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1649 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1650 ETH_ALEN) == 0)) {
1651 struct ieee80211_channel_sw_ie *sw_elem =
1652 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1653 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1654 }
1655 }
1656
1657
1658 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1659 struct ieee80211_mgd_work *wk,
1660 struct ieee80211_mgmt *mgmt, size_t len,
1661 struct ieee80211_rx_status *rx_status)
1662 {
1663 struct ieee80211_if_managed *ifmgd;
1664 size_t baselen;
1665 struct ieee802_11_elems elems;
1666
1667 ifmgd = &sdata->u.mgd;
1668
1669 ASSERT_MGD_MTX(ifmgd);
1670
1671 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1672 return; /* ignore ProbeResp to foreign address */
1673
1674 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1675 if (baselen > len)
1676 return;
1677
1678 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1679 &elems);
1680
1681 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1682
1683 /* direct probe may be part of the association flow */
1684 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
1685 printk(KERN_DEBUG "%s: direct probe responded\n",
1686 sdata->dev->name);
1687 wk->tries = 0;
1688 wk->state = IEEE80211_MGD_STATE_AUTH;
1689 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
1690 }
1691
1692 if (ifmgd->associated &&
1693 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
1694 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1695 IEEE80211_STA_CONNECTION_POLL)) {
1696 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1697 IEEE80211_STA_BEACON_POLL);
1698 mutex_lock(&sdata->local->iflist_mtx);
1699 ieee80211_recalc_ps(sdata->local, -1);
1700 mutex_unlock(&sdata->local->iflist_mtx);
1701 /*
1702 * We've received a probe response, but are not sure whether
1703 * we have or will be receiving any beacons or data, so let's
1704 * schedule the timers again, just in case.
1705 */
1706 mod_beacon_timer(sdata);
1707 mod_timer(&ifmgd->conn_mon_timer,
1708 round_jiffies_up(jiffies +
1709 IEEE80211_CONNECTION_IDLE_TIME));
1710 }
1711 }
1712
1713 /*
1714 * This is the canonical list of information elements we care about,
1715 * the filter code also gives us all changes to the Microsoft OUI
1716 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1717 *
1718 * We implement beacon filtering in software since that means we can
1719 * avoid processing the frame here and in cfg80211, and userspace
1720 * will not be able to tell whether the hardware supports it or not.
1721 *
1722 * XXX: This list needs to be dynamic -- userspace needs to be able to
1723 * add items it requires. It also needs to be able to tell us to
1724 * look out for other vendor IEs.
1725 */
1726 static const u64 care_about_ies =
1727 (1ULL << WLAN_EID_COUNTRY) |
1728 (1ULL << WLAN_EID_ERP_INFO) |
1729 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1730 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1731 (1ULL << WLAN_EID_HT_CAPABILITY) |
1732 (1ULL << WLAN_EID_HT_INFORMATION);
1733
1734 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1735 struct ieee80211_mgmt *mgmt,
1736 size_t len,
1737 struct ieee80211_rx_status *rx_status)
1738 {
1739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1740 size_t baselen;
1741 struct ieee802_11_elems elems;
1742 struct ieee80211_local *local = sdata->local;
1743 u32 changed = 0;
1744 bool erp_valid, directed_tim = false;
1745 u8 erp_value = 0;
1746 u32 ncrc;
1747 u8 *bssid;
1748
1749 ASSERT_MGD_MTX(ifmgd);
1750
1751 /* Process beacon from the current BSS */
1752 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1753 if (baselen > len)
1754 return;
1755
1756 if (rx_status->freq != local->hw.conf.channel->center_freq)
1757 return;
1758
1759 /*
1760 * We might have received a number of frames, among them a
1761 * disassoc frame and a beacon...
1762 */
1763 if (!ifmgd->associated)
1764 return;
1765
1766 bssid = ifmgd->associated->cbss.bssid;
1767
1768 /*
1769 * And in theory even frames from a different AP we were just
1770 * associated to a split-second ago!
1771 */
1772 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1773 return;
1774
1775 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1776 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1777 if (net_ratelimit()) {
1778 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1779 "to a received beacon\n", sdata->dev->name);
1780 }
1781 #endif
1782 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1783 mutex_lock(&local->iflist_mtx);
1784 ieee80211_recalc_ps(local, -1);
1785 mutex_unlock(&local->iflist_mtx);
1786 }
1787
1788 /*
1789 * Push the beacon loss detection into the future since
1790 * we are processing a beacon from the AP just now.
1791 */
1792 mod_beacon_timer(sdata);
1793
1794 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1795 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1796 len - baselen, &elems,
1797 care_about_ies, ncrc);
1798
1799 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1800 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1801 ifmgd->aid);
1802
1803 if (ncrc != ifmgd->beacon_crc) {
1804 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1805 true);
1806
1807 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1808 elems.wmm_param_len);
1809 }
1810
1811 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1812 if (directed_tim) {
1813 if (local->hw.conf.dynamic_ps_timeout > 0) {
1814 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1815 ieee80211_hw_config(local,
1816 IEEE80211_CONF_CHANGE_PS);
1817 ieee80211_send_nullfunc(local, sdata, 0);
1818 } else {
1819 local->pspolling = true;
1820
1821 /*
1822 * Here is assumed that the driver will be
1823 * able to send ps-poll frame and receive a
1824 * response even though power save mode is
1825 * enabled, but some drivers might require
1826 * to disable power save here. This needs
1827 * to be investigated.
1828 */
1829 ieee80211_send_pspoll(local, sdata);
1830 }
1831 }
1832 }
1833
1834 if (ncrc == ifmgd->beacon_crc)
1835 return;
1836 ifmgd->beacon_crc = ncrc;
1837
1838 if (elems.erp_info && elems.erp_info_len >= 1) {
1839 erp_valid = true;
1840 erp_value = elems.erp_info[0];
1841 } else {
1842 erp_valid = false;
1843 }
1844 changed |= ieee80211_handle_bss_capability(sdata,
1845 le16_to_cpu(mgmt->u.beacon.capab_info),
1846 erp_valid, erp_value);
1847
1848
1849 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1850 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1851 struct sta_info *sta;
1852 struct ieee80211_supported_band *sband;
1853 u16 ap_ht_cap_flags;
1854
1855 rcu_read_lock();
1856
1857 sta = sta_info_get(local, bssid);
1858 if (WARN_ON(!sta)) {
1859 rcu_read_unlock();
1860 return;
1861 }
1862
1863 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1864
1865 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1866 elems.ht_cap_elem, &sta->sta.ht_cap);
1867
1868 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1869
1870 rcu_read_unlock();
1871
1872 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1873 bssid, ap_ht_cap_flags);
1874 }
1875
1876 /* Note: country IE parsing is done for us by cfg80211 */
1877 if (elems.country_elem) {
1878 /* TODO: IBSS also needs this */
1879 if (elems.pwr_constr_elem)
1880 ieee80211_handle_pwr_constr(sdata,
1881 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1882 elems.pwr_constr_elem,
1883 elems.pwr_constr_elem_len);
1884 }
1885
1886 ieee80211_bss_info_change_notify(sdata, changed);
1887 }
1888
1889 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1890 struct sk_buff *skb)
1891 {
1892 struct ieee80211_local *local = sdata->local;
1893 struct ieee80211_mgmt *mgmt;
1894 u16 fc;
1895
1896 if (skb->len < 24)
1897 return RX_DROP_MONITOR;
1898
1899 mgmt = (struct ieee80211_mgmt *) skb->data;
1900 fc = le16_to_cpu(mgmt->frame_control);
1901
1902 switch (fc & IEEE80211_FCTL_STYPE) {
1903 case IEEE80211_STYPE_PROBE_REQ:
1904 case IEEE80211_STYPE_PROBE_RESP:
1905 case IEEE80211_STYPE_BEACON:
1906 case IEEE80211_STYPE_AUTH:
1907 case IEEE80211_STYPE_ASSOC_RESP:
1908 case IEEE80211_STYPE_REASSOC_RESP:
1909 case IEEE80211_STYPE_DEAUTH:
1910 case IEEE80211_STYPE_DISASSOC:
1911 case IEEE80211_STYPE_ACTION:
1912 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1913 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
1914 return RX_QUEUED;
1915 }
1916
1917 return RX_DROP_MONITOR;
1918 }
1919
1920 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1921 struct sk_buff *skb)
1922 {
1923 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1924 struct ieee80211_rx_status *rx_status;
1925 struct ieee80211_mgmt *mgmt;
1926 struct ieee80211_mgd_work *wk;
1927 enum rx_mgmt_action rma = RX_MGMT_NONE;
1928 u16 fc;
1929
1930 rx_status = (struct ieee80211_rx_status *) skb->cb;
1931 mgmt = (struct ieee80211_mgmt *) skb->data;
1932 fc = le16_to_cpu(mgmt->frame_control);
1933
1934 mutex_lock(&ifmgd->mtx);
1935
1936 if (ifmgd->associated &&
1937 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1938 ETH_ALEN) == 0) {
1939 switch (fc & IEEE80211_FCTL_STYPE) {
1940 case IEEE80211_STYPE_BEACON:
1941 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1942 rx_status);
1943 break;
1944 case IEEE80211_STYPE_PROBE_RESP:
1945 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1946 skb->len, rx_status);
1947 break;
1948 case IEEE80211_STYPE_DEAUTH:
1949 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1950 mgmt, skb->len);
1951 break;
1952 case IEEE80211_STYPE_DISASSOC:
1953 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1954 break;
1955 case IEEE80211_STYPE_ACTION:
1956 /* XXX: differentiate, can only happen for CSA now! */
1957 ieee80211_sta_process_chanswitch(sdata,
1958 &mgmt->u.action.u.chan_switch.sw_elem,
1959 ifmgd->associated);
1960 break;
1961 }
1962 mutex_unlock(&ifmgd->mtx);
1963
1964 switch (rma) {
1965 case RX_MGMT_NONE:
1966 /* no action */
1967 break;
1968 case RX_MGMT_CFG80211_DEAUTH:
1969 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len,
1970 NULL);
1971 break;
1972 case RX_MGMT_CFG80211_DISASSOC:
1973 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len,
1974 NULL);
1975 break;
1976 default:
1977 WARN(1, "unexpected: %d", rma);
1978 }
1979 goto out;
1980 }
1981
1982 list_for_each_entry(wk, &ifmgd->work_list, list) {
1983 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1984 continue;
1985
1986 switch (fc & IEEE80211_FCTL_STYPE) {
1987 case IEEE80211_STYPE_PROBE_RESP:
1988 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1989 rx_status);
1990 break;
1991 case IEEE80211_STYPE_AUTH:
1992 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1993 break;
1994 case IEEE80211_STYPE_ASSOC_RESP:
1995 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1996 skb->len, false);
1997 break;
1998 case IEEE80211_STYPE_REASSOC_RESP:
1999 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
2000 skb->len, true);
2001 break;
2002 case IEEE80211_STYPE_DEAUTH:
2003 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
2004 skb->len);
2005 break;
2006 }
2007 /*
2008 * We've processed this frame for that work, so it can't
2009 * belong to another work struct.
2010 * NB: this is also required for correctness because the
2011 * called functions can free 'wk', and for 'rma'!
2012 */
2013 break;
2014 }
2015
2016 mutex_unlock(&ifmgd->mtx);
2017
2018 switch (rma) {
2019 case RX_MGMT_NONE:
2020 /* no action */
2021 break;
2022 case RX_MGMT_CFG80211_AUTH:
2023 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
2024 break;
2025 case RX_MGMT_CFG80211_ASSOC:
2026 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
2027 break;
2028 case RX_MGMT_CFG80211_DEAUTH:
2029 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, NULL);
2030 break;
2031 default:
2032 WARN(1, "unexpected: %d", rma);
2033 }
2034
2035 out:
2036 kfree_skb(skb);
2037 }
2038
2039 static void ieee80211_sta_timer(unsigned long data)
2040 {
2041 struct ieee80211_sub_if_data *sdata =
2042 (struct ieee80211_sub_if_data *) data;
2043 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2044 struct ieee80211_local *local = sdata->local;
2045
2046 if (local->quiescing) {
2047 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2048 return;
2049 }
2050
2051 ieee80211_queue_work(&local->hw, &ifmgd->work);
2052 }
2053
2054 static void ieee80211_sta_work(struct work_struct *work)
2055 {
2056 struct ieee80211_sub_if_data *sdata =
2057 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2058 struct ieee80211_local *local = sdata->local;
2059 struct ieee80211_if_managed *ifmgd;
2060 struct sk_buff *skb;
2061 struct ieee80211_mgd_work *wk, *tmp;
2062 LIST_HEAD(free_work);
2063 enum rx_mgmt_action rma;
2064 bool anybusy = false;
2065
2066 if (!netif_running(sdata->dev))
2067 return;
2068
2069 if (local->scanning)
2070 return;
2071
2072 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2073 return;
2074
2075 /*
2076 * ieee80211_queue_work() should have picked up most cases,
2077 * here we'll pick the the rest.
2078 */
2079 if (WARN(local->suspended, "STA MLME work scheduled while "
2080 "going to suspend\n"))
2081 return;
2082
2083 ifmgd = &sdata->u.mgd;
2084
2085 /* first process frames to avoid timing out while a frame is pending */
2086 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2087 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2088
2089 /* then process the rest of the work */
2090 mutex_lock(&ifmgd->mtx);
2091
2092 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2093 IEEE80211_STA_CONNECTION_POLL) &&
2094 ifmgd->associated) {
2095 u8 bssid[ETH_ALEN];
2096
2097 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
2098 if (time_is_after_jiffies(ifmgd->probe_timeout))
2099 run_again(ifmgd, ifmgd->probe_timeout);
2100
2101 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
2102 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2103 printk(KERN_DEBUG "No probe response from AP %pM"
2104 " after %dms, try %d\n", bssid,
2105 (1000 * IEEE80211_PROBE_WAIT)/HZ,
2106 ifmgd->probe_send_count);
2107 #endif
2108 ieee80211_mgd_probe_ap_send(sdata);
2109 } else {
2110 /*
2111 * We actually lost the connection ... or did we?
2112 * Let's make sure!
2113 */
2114 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2115 IEEE80211_STA_BEACON_POLL);
2116 printk(KERN_DEBUG "No probe response from AP %pM"
2117 " after %dms, disconnecting.\n",
2118 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
2119 ieee80211_set_disassoc(sdata, true);
2120 mutex_unlock(&ifmgd->mtx);
2121 /*
2122 * must be outside lock due to cfg80211,
2123 * but that's not a problem.
2124 */
2125 ieee80211_send_deauth_disassoc(sdata, bssid,
2126 IEEE80211_STYPE_DEAUTH,
2127 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2128 NULL);
2129 mutex_lock(&ifmgd->mtx);
2130 }
2131 }
2132
2133
2134 ieee80211_recalc_idle(local);
2135
2136 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
2137 if (time_is_after_jiffies(wk->timeout)) {
2138 /*
2139 * This work item isn't supposed to be worked on
2140 * right now, but take care to adjust the timer
2141 * properly.
2142 */
2143 run_again(ifmgd, wk->timeout);
2144 continue;
2145 }
2146
2147 switch (wk->state) {
2148 default:
2149 WARN_ON(1);
2150 /* fall through */
2151 case IEEE80211_MGD_STATE_IDLE:
2152 /* nothing */
2153 rma = RX_MGMT_NONE;
2154 break;
2155 case IEEE80211_MGD_STATE_PROBE:
2156 rma = ieee80211_direct_probe(sdata, wk);
2157 break;
2158 case IEEE80211_MGD_STATE_AUTH:
2159 rma = ieee80211_authenticate(sdata, wk);
2160 break;
2161 case IEEE80211_MGD_STATE_ASSOC:
2162 rma = ieee80211_associate(sdata, wk);
2163 break;
2164 }
2165
2166 switch (rma) {
2167 case RX_MGMT_NONE:
2168 /* no action required */
2169 break;
2170 case RX_MGMT_CFG80211_AUTH_TO:
2171 case RX_MGMT_CFG80211_ASSOC_TO:
2172 list_del(&wk->list);
2173 list_add(&wk->list, &free_work);
2174 wk->tries = rma; /* small abuse but only local */
2175 break;
2176 default:
2177 WARN(1, "unexpected: %d", rma);
2178 }
2179 }
2180
2181 list_for_each_entry(wk, &ifmgd->work_list, list) {
2182 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
2183 anybusy = true;
2184 break;
2185 }
2186 }
2187 if (!anybusy &&
2188 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
2189 ieee80211_queue_delayed_work(&local->hw,
2190 &local->scan_work,
2191 round_jiffies_relative(0));
2192
2193 mutex_unlock(&ifmgd->mtx);
2194
2195 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2196 switch (wk->tries) {
2197 case RX_MGMT_CFG80211_AUTH_TO:
2198 cfg80211_send_auth_timeout(sdata->dev,
2199 wk->bss->cbss.bssid);
2200 break;
2201 case RX_MGMT_CFG80211_ASSOC_TO:
2202 cfg80211_send_assoc_timeout(sdata->dev,
2203 wk->bss->cbss.bssid);
2204 break;
2205 default:
2206 WARN(1, "unexpected: %d", wk->tries);
2207 }
2208
2209 list_del(&wk->list);
2210 kfree(wk);
2211 }
2212
2213 ieee80211_recalc_idle(local);
2214 }
2215
2216 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2217 {
2218 struct ieee80211_sub_if_data *sdata =
2219 (struct ieee80211_sub_if_data *) data;
2220 struct ieee80211_local *local = sdata->local;
2221
2222 if (local->quiescing)
2223 return;
2224
2225 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
2226 }
2227
2228 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2229 {
2230 struct ieee80211_sub_if_data *sdata =
2231 (struct ieee80211_sub_if_data *) data;
2232 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2233 struct ieee80211_local *local = sdata->local;
2234
2235 if (local->quiescing)
2236 return;
2237
2238 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2239 }
2240
2241 static void ieee80211_sta_monitor_work(struct work_struct *work)
2242 {
2243 struct ieee80211_sub_if_data *sdata =
2244 container_of(work, struct ieee80211_sub_if_data,
2245 u.mgd.monitor_work);
2246
2247 ieee80211_mgd_probe_ap(sdata, false);
2248 }
2249
2250 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2251 {
2252 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2253 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2254 IEEE80211_STA_CONNECTION_POLL);
2255
2256 /* let's probe the connection once */
2257 ieee80211_queue_work(&sdata->local->hw,
2258 &sdata->u.mgd.monitor_work);
2259 /* and do all the other regular work too */
2260 ieee80211_queue_work(&sdata->local->hw,
2261 &sdata->u.mgd.work);
2262 }
2263 }
2264
2265 #ifdef CONFIG_PM
2266 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2267 {
2268 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2269
2270 /*
2271 * we need to use atomic bitops for the running bits
2272 * only because both timers might fire at the same
2273 * time -- the code here is properly synchronised.
2274 */
2275
2276 cancel_work_sync(&ifmgd->work);
2277 cancel_work_sync(&ifmgd->beacon_loss_work);
2278 if (del_timer_sync(&ifmgd->timer))
2279 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2280
2281 cancel_work_sync(&ifmgd->chswitch_work);
2282 if (del_timer_sync(&ifmgd->chswitch_timer))
2283 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2284
2285 cancel_work_sync(&ifmgd->monitor_work);
2286 /* these will just be re-established on connection */
2287 del_timer_sync(&ifmgd->conn_mon_timer);
2288 del_timer_sync(&ifmgd->bcn_mon_timer);
2289 }
2290
2291 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2292 {
2293 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2294
2295 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2296 add_timer(&ifmgd->timer);
2297 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2298 add_timer(&ifmgd->chswitch_timer);
2299 }
2300 #endif
2301
2302 /* interface setup */
2303 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2304 {
2305 struct ieee80211_if_managed *ifmgd;
2306
2307 ifmgd = &sdata->u.mgd;
2308 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2309 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2310 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2311 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2312 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2313 (unsigned long) sdata);
2314 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2315 (unsigned long) sdata);
2316 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2317 (unsigned long) sdata);
2318 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2319 (unsigned long) sdata);
2320 skb_queue_head_init(&ifmgd->skb_queue);
2321
2322 INIT_LIST_HEAD(&ifmgd->work_list);
2323
2324 ifmgd->capab = WLAN_CAPABILITY_ESS;
2325 ifmgd->flags = 0;
2326 if (sdata->local->hw.queues >= 4)
2327 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2328
2329 mutex_init(&ifmgd->mtx);
2330 }
2331
2332 /* scan finished notification */
2333 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2334 {
2335 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2336
2337 /* Restart STA timers */
2338 rcu_read_lock();
2339 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2340 ieee80211_restart_sta_timer(sdata);
2341 rcu_read_unlock();
2342 }
2343
2344 int ieee80211_max_network_latency(struct notifier_block *nb,
2345 unsigned long data, void *dummy)
2346 {
2347 s32 latency_usec = (s32) data;
2348 struct ieee80211_local *local =
2349 container_of(nb, struct ieee80211_local,
2350 network_latency_notifier);
2351
2352 mutex_lock(&local->iflist_mtx);
2353 ieee80211_recalc_ps(local, latency_usec);
2354 mutex_unlock(&local->iflist_mtx);
2355
2356 return 0;
2357 }
2358
2359 /* config hooks */
2360 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2361 struct cfg80211_auth_request *req)
2362 {
2363 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2364 const u8 *ssid;
2365 struct ieee80211_mgd_work *wk;
2366 u16 auth_alg;
2367
2368 switch (req->auth_type) {
2369 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2370 auth_alg = WLAN_AUTH_OPEN;
2371 break;
2372 case NL80211_AUTHTYPE_SHARED_KEY:
2373 auth_alg = WLAN_AUTH_SHARED_KEY;
2374 break;
2375 case NL80211_AUTHTYPE_FT:
2376 auth_alg = WLAN_AUTH_FT;
2377 break;
2378 case NL80211_AUTHTYPE_NETWORK_EAP:
2379 auth_alg = WLAN_AUTH_LEAP;
2380 break;
2381 default:
2382 return -EOPNOTSUPP;
2383 }
2384
2385 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2386 if (!wk)
2387 return -ENOMEM;
2388
2389 wk->bss = (void *)req->bss;
2390
2391 if (req->ie && req->ie_len) {
2392 memcpy(wk->ie, req->ie, req->ie_len);
2393 wk->ie_len = req->ie_len;
2394 }
2395
2396 if (req->key && req->key_len) {
2397 wk->key_len = req->key_len;
2398 wk->key_idx = req->key_idx;
2399 memcpy(wk->key, req->key, req->key_len);
2400 }
2401
2402 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2403 memcpy(wk->ssid, ssid + 2, ssid[1]);
2404 wk->ssid_len = ssid[1];
2405
2406 wk->state = IEEE80211_MGD_STATE_PROBE;
2407 wk->auth_alg = auth_alg;
2408 wk->timeout = jiffies; /* run right away */
2409
2410 /*
2411 * XXX: if still associated need to tell AP that we're going
2412 * to sleep and then change channel etc.
2413 */
2414 sdata->local->oper_channel = req->bss->channel;
2415 ieee80211_hw_config(sdata->local, 0);
2416
2417 mutex_lock(&ifmgd->mtx);
2418 list_add(&wk->list, &sdata->u.mgd.work_list);
2419 mutex_unlock(&ifmgd->mtx);
2420
2421 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
2422 return 0;
2423 }
2424
2425 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2426 struct cfg80211_assoc_request *req)
2427 {
2428 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2429 struct ieee80211_mgd_work *wk, *found = NULL;
2430 int i, err;
2431
2432 mutex_lock(&ifmgd->mtx);
2433
2434 list_for_each_entry(wk, &ifmgd->work_list, list) {
2435 if (&wk->bss->cbss == req->bss &&
2436 wk->state == IEEE80211_MGD_STATE_IDLE) {
2437 found = wk;
2438 break;
2439 }
2440 }
2441
2442 if (!found) {
2443 err = -ENOLINK;
2444 goto out;
2445 }
2446
2447 list_del(&found->list);
2448
2449 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2450 if (!wk) {
2451 list_add(&found->list, &ifmgd->work_list);
2452 err = -ENOMEM;
2453 goto out;
2454 }
2455
2456 list_add(&wk->list, &ifmgd->work_list);
2457
2458 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2459
2460 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2461 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2462 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2463 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2464 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2465
2466 sdata->local->oper_channel = req->bss->channel;
2467 ieee80211_hw_config(sdata->local, 0);
2468
2469 if (req->ie && req->ie_len) {
2470 memcpy(wk->ie, req->ie, req->ie_len);
2471 wk->ie_len = req->ie_len;
2472 } else
2473 wk->ie_len = 0;
2474
2475 if (req->prev_bssid)
2476 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2477
2478 wk->state = IEEE80211_MGD_STATE_ASSOC;
2479 wk->tries = 0;
2480 wk->timeout = jiffies; /* run right away */
2481
2482 if (req->use_mfp) {
2483 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2484 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2485 } else {
2486 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2487 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2488 }
2489
2490 if (req->crypto.control_port)
2491 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2492 else
2493 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2494
2495 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
2496
2497 err = 0;
2498
2499 out:
2500 mutex_unlock(&ifmgd->mtx);
2501 return err;
2502 }
2503
2504 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2505 struct cfg80211_deauth_request *req,
2506 void *cookie)
2507 {
2508 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2509 struct ieee80211_mgd_work *wk;
2510 const u8 *bssid = NULL;
2511
2512 mutex_lock(&ifmgd->mtx);
2513
2514 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2515 bssid = req->bss->bssid;
2516 ieee80211_set_disassoc(sdata, true);
2517 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2518 if (&wk->bss->cbss == req->bss) {
2519 bssid = req->bss->bssid;
2520 list_del(&wk->list);
2521 kfree(wk);
2522 break;
2523 }
2524 }
2525
2526 /*
2527 * cfg80211 should catch this ... but it's racy since
2528 * we can receive a deauth frame, process it, hand it
2529 * to cfg80211 while that's in a locked section already
2530 * trying to tell us that the user wants to disconnect.
2531 */
2532 if (!bssid) {
2533 mutex_unlock(&ifmgd->mtx);
2534 return -ENOLINK;
2535 }
2536
2537 mutex_unlock(&ifmgd->mtx);
2538
2539 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2540 sdata->dev->name, bssid, req->reason_code);
2541
2542 ieee80211_send_deauth_disassoc(sdata, bssid,
2543 IEEE80211_STYPE_DEAUTH, req->reason_code,
2544 cookie);
2545
2546 return 0;
2547 }
2548
2549 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2550 struct cfg80211_disassoc_request *req,
2551 void *cookie)
2552 {
2553 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2554
2555 mutex_lock(&ifmgd->mtx);
2556
2557 /*
2558 * cfg80211 should catch this ... but it's racy since
2559 * we can receive a disassoc frame, process it, hand it
2560 * to cfg80211 while that's in a locked section already
2561 * trying to tell us that the user wants to disconnect.
2562 */
2563 if (&ifmgd->associated->cbss != req->bss) {
2564 mutex_unlock(&ifmgd->mtx);
2565 return -ENOLINK;
2566 }
2567
2568 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2569 sdata->dev->name, req->bss->bssid, req->reason_code);
2570
2571 ieee80211_set_disassoc(sdata, false);
2572
2573 mutex_unlock(&ifmgd->mtx);
2574
2575 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2576 IEEE80211_STYPE_DISASSOC, req->reason_code,
2577 cookie);
2578 return 0;
2579 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree