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mac80211: Replace {sw, hw}_scanning variables with a bitfield
[wandboard.git] / net / mac80211 / mlme.c
blob52b6f8327a5b98f4d6d568a22985f4f943be9ff4
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
35 /*
36 * beacon loss detection timeout
37 * XXX: should depend on beacon interval
38 */
39 #define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
40 /*
41 * Time the connection can be idle before we probe
42 * it to see if we can still talk to the AP.
43 */
44 #define IEEE80211_CONNECTION_IDLE_TIME (2 * HZ)
45 /*
46 * Time we wait for a probe response after sending
47 * a probe request because of beacon loss or for
48 * checking the connection still works.
49 */
50 #define IEEE80211_PROBE_WAIT (HZ / 5)
51
52 #define TMR_RUNNING_TIMER 0
53 #define TMR_RUNNING_CHANSW 1
54
55 /*
56 * All cfg80211 functions have to be called outside a locked
57 * section so that they can acquire a lock themselves... This
58 * is much simpler than queuing up things in cfg80211, but we
59 * do need some indirection for that here.
60 */
61 enum rx_mgmt_action {
62 /* no action required */
63 RX_MGMT_NONE,
64
65 /* caller must call cfg80211_send_rx_auth() */
66 RX_MGMT_CFG80211_AUTH,
67
68 /* caller must call cfg80211_send_rx_assoc() */
69 RX_MGMT_CFG80211_ASSOC,
70
71 /* caller must call cfg80211_send_deauth() */
72 RX_MGMT_CFG80211_DEAUTH,
73
74 /* caller must call cfg80211_send_disassoc() */
75 RX_MGMT_CFG80211_DISASSOC,
76
77 /* caller must call cfg80211_auth_timeout() & free work */
78 RX_MGMT_CFG80211_AUTH_TO,
79
80 /* caller must call cfg80211_assoc_timeout() & free work */
81 RX_MGMT_CFG80211_ASSOC_TO,
82 };
83
84 /* utils */
85 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
86 {
87 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
88 }
89
90 /*
91 * We can have multiple work items (and connection probing)
92 * scheduling this timer, but we need to take care to only
93 * reschedule it when it should fire _earlier_ than it was
94 * asked for before, or if it's not pending right now. This
95 * function ensures that. Note that it then is required to
96 * run this function for all timeouts after the first one
97 * has happened -- the work that runs from this timer will
98 * do that.
99 */
100 static void run_again(struct ieee80211_if_managed *ifmgd,
101 unsigned long timeout)
102 {
103 ASSERT_MGD_MTX(ifmgd);
104
105 if (!timer_pending(&ifmgd->timer) ||
106 time_before(timeout, ifmgd->timer.expires))
107 mod_timer(&ifmgd->timer, timeout);
108 }
109
110 static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
111 {
112 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
113 return;
114
115 mod_timer(&sdata->u.mgd.bcn_mon_timer,
116 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
117 }
118
119 static int ecw2cw(int ecw)
120 {
121 return (1 << ecw) - 1;
122 }
123
124 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
125 struct ieee80211_supported_band *sband,
126 u32 *rates)
127 {
128 int i, j, count;
129 *rates = 0;
130 count = 0;
131 for (i = 0; i < bss->supp_rates_len; i++) {
132 int rate = (bss->supp_rates[i] & 0x7F) * 5;
133
134 for (j = 0; j < sband->n_bitrates; j++)
135 if (sband->bitrates[j].bitrate == rate) {
136 *rates |= BIT(j);
137 count++;
138 break;
139 }
140 }
141
142 return count;
143 }
144
145 /*
146 * ieee80211_enable_ht should be called only after the operating band
147 * has been determined as ht configuration depends on the hw's
148 * HT abilities for a specific band.
149 */
150 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_ht_info *hti,
152 const u8 *bssid, u16 ap_ht_cap_flags)
153 {
154 struct ieee80211_local *local = sdata->local;
155 struct ieee80211_supported_band *sband;
156 struct sta_info *sta;
157 u32 changed = 0;
158 u16 ht_opmode;
159 bool enable_ht = true, ht_changed;
160 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
161
162 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
163
164 /* HT is not supported */
165 if (!sband->ht_cap.ht_supported)
166 enable_ht = false;
167
168 /* check that channel matches the right operating channel */
169 if (local->hw.conf.channel->center_freq !=
170 ieee80211_channel_to_frequency(hti->control_chan))
171 enable_ht = false;
172
173 if (enable_ht) {
174 channel_type = NL80211_CHAN_HT20;
175
176 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
177 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
178 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
179 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
180 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
181 if (!(local->hw.conf.channel->flags &
182 IEEE80211_CHAN_NO_HT40PLUS))
183 channel_type = NL80211_CHAN_HT40PLUS;
184 break;
185 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
186 if (!(local->hw.conf.channel->flags &
187 IEEE80211_CHAN_NO_HT40MINUS))
188 channel_type = NL80211_CHAN_HT40MINUS;
189 break;
190 }
191 }
192 }
193
194 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
195 channel_type != local->hw.conf.channel_type;
196
197 local->oper_channel_type = channel_type;
198
199 if (ht_changed) {
200 /* channel_type change automatically detected */
201 ieee80211_hw_config(local, 0);
202
203 rcu_read_lock();
204 sta = sta_info_get(local, bssid);
205 if (sta)
206 rate_control_rate_update(local, sband, sta,
207 IEEE80211_RC_HT_CHANGED);
208 rcu_read_unlock();
209 }
210
211 /* disable HT */
212 if (!enable_ht)
213 return 0;
214
215 ht_opmode = le16_to_cpu(hti->operation_mode);
216
217 /* if bss configuration changed store the new one */
218 if (!sdata->ht_opmode_valid ||
219 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
220 changed |= BSS_CHANGED_HT;
221 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
222 sdata->ht_opmode_valid = true;
223 }
224
225 return changed;
226 }
227
228 /* frame sending functions */
229
230 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
231 struct ieee80211_mgd_work *wk)
232 {
233 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
234 struct ieee80211_local *local = sdata->local;
235 struct sk_buff *skb;
236 struct ieee80211_mgmt *mgmt;
237 u8 *pos;
238 const u8 *ies, *ht_ie;
239 int i, len, count, rates_len, supp_rates_len;
240 u16 capab;
241 int wmm = 0;
242 struct ieee80211_supported_band *sband;
243 u32 rates = 0;
244
245 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
246 sizeof(*mgmt) + 200 + wk->ie_len +
247 wk->ssid_len);
248 if (!skb) {
249 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
250 "frame\n", sdata->dev->name);
251 return;
252 }
253 skb_reserve(skb, local->hw.extra_tx_headroom);
254
255 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
256
257 capab = ifmgd->capab;
258
259 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
260 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
261 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
262 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
263 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
264 }
265
266 if (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
267 capab |= WLAN_CAPABILITY_PRIVACY;
268 if (wk->bss->wmm_used)
269 wmm = 1;
270
271 /* get all rates supported by the device and the AP as
272 * some APs don't like getting a superset of their rates
273 * in the association request (e.g. D-Link DAP 1353 in
274 * b-only mode) */
275 rates_len = ieee80211_compatible_rates(wk->bss, sband, &rates);
276
277 if ((wk->bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
278 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
279 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
280
281 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
282 memset(mgmt, 0, 24);
283 memcpy(mgmt->da, wk->bss->cbss.bssid, ETH_ALEN);
284 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
285 memcpy(mgmt->bssid, wk->bss->cbss.bssid, ETH_ALEN);
286
287 if (!is_zero_ether_addr(wk->prev_bssid)) {
288 skb_put(skb, 10);
289 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
290 IEEE80211_STYPE_REASSOC_REQ);
291 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
292 mgmt->u.reassoc_req.listen_interval =
293 cpu_to_le16(local->hw.conf.listen_interval);
294 memcpy(mgmt->u.reassoc_req.current_ap, wk->prev_bssid,
295 ETH_ALEN);
296 } else {
297 skb_put(skb, 4);
298 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
299 IEEE80211_STYPE_ASSOC_REQ);
300 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
301 mgmt->u.assoc_req.listen_interval =
302 cpu_to_le16(local->hw.conf.listen_interval);
303 }
304
305 /* SSID */
306 ies = pos = skb_put(skb, 2 + wk->ssid_len);
307 *pos++ = WLAN_EID_SSID;
308 *pos++ = wk->ssid_len;
309 memcpy(pos, wk->ssid, wk->ssid_len);
310
311 /* add all rates which were marked to be used above */
312 supp_rates_len = rates_len;
313 if (supp_rates_len > 8)
314 supp_rates_len = 8;
315
316 len = sband->n_bitrates;
317 pos = skb_put(skb, supp_rates_len + 2);
318 *pos++ = WLAN_EID_SUPP_RATES;
319 *pos++ = supp_rates_len;
320
321 count = 0;
322 for (i = 0; i < sband->n_bitrates; i++) {
323 if (BIT(i) & rates) {
324 int rate = sband->bitrates[i].bitrate;
325 *pos++ = (u8) (rate / 5);
326 if (++count == 8)
327 break;
328 }
329 }
330
331 if (rates_len > count) {
332 pos = skb_put(skb, rates_len - count + 2);
333 *pos++ = WLAN_EID_EXT_SUPP_RATES;
334 *pos++ = rates_len - count;
335
336 for (i++; i < sband->n_bitrates; i++) {
337 if (BIT(i) & rates) {
338 int rate = sband->bitrates[i].bitrate;
339 *pos++ = (u8) (rate / 5);
340 }
341 }
342 }
343
344 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
345 /* 1. power capabilities */
346 pos = skb_put(skb, 4);
347 *pos++ = WLAN_EID_PWR_CAPABILITY;
348 *pos++ = 2;
349 *pos++ = 0; /* min tx power */
350 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
351
352 /* 2. supported channels */
353 /* TODO: get this in reg domain format */
354 pos = skb_put(skb, 2 * sband->n_channels + 2);
355 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
356 *pos++ = 2 * sband->n_channels;
357 for (i = 0; i < sband->n_channels; i++) {
358 *pos++ = ieee80211_frequency_to_channel(
359 sband->channels[i].center_freq);
360 *pos++ = 1; /* one channel in the subband*/
361 }
362 }
363
364 if (wk->ie_len && wk->ie) {
365 pos = skb_put(skb, wk->ie_len);
366 memcpy(pos, wk->ie, wk->ie_len);
367 }
368
369 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
370 pos = skb_put(skb, 9);
371 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
372 *pos++ = 7; /* len */
373 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
374 *pos++ = 0x50;
375 *pos++ = 0xf2;
376 *pos++ = 2; /* WME */
377 *pos++ = 0; /* WME info */
378 *pos++ = 1; /* WME ver */
379 *pos++ = 0;
380 }
381
382 /* wmm support is a must to HT */
383 /*
384 * IEEE802.11n does not allow TKIP/WEP as pairwise
385 * ciphers in HT mode. We still associate in non-ht
386 * mode (11a/b/g) if any one of these ciphers is
387 * configured as pairwise.
388 */
389 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
390 sband->ht_cap.ht_supported &&
391 (ht_ie = ieee80211_bss_get_ie(&wk->bss->cbss, WLAN_EID_HT_INFORMATION)) &&
392 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
393 (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
394 struct ieee80211_ht_info *ht_info =
395 (struct ieee80211_ht_info *)(ht_ie + 2);
396 u16 cap = sband->ht_cap.cap;
397 __le16 tmp;
398 u32 flags = local->hw.conf.channel->flags;
399
400 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
401 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
402 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
403 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
404 cap &= ~IEEE80211_HT_CAP_SGI_40;
405 }
406 break;
407 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
408 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
409 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
410 cap &= ~IEEE80211_HT_CAP_SGI_40;
411 }
412 break;
413 }
414
415 tmp = cpu_to_le16(cap);
416 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
417 *pos++ = WLAN_EID_HT_CAPABILITY;
418 *pos++ = sizeof(struct ieee80211_ht_cap);
419 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
420 memcpy(pos, &tmp, sizeof(u16));
421 pos += sizeof(u16);
422 /* TODO: needs a define here for << 2 */
423 *pos++ = sband->ht_cap.ampdu_factor |
424 (sband->ht_cap.ampdu_density << 2);
425 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
426 }
427
428 ieee80211_tx_skb(sdata, skb, 0);
429 }
430
431
432 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
433 const u8 *bssid, u16 stype, u16 reason,
434 void *cookie)
435 {
436 struct ieee80211_local *local = sdata->local;
437 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
438 struct sk_buff *skb;
439 struct ieee80211_mgmt *mgmt;
440
441 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
442 if (!skb) {
443 printk(KERN_DEBUG "%s: failed to allocate buffer for "
444 "deauth/disassoc frame\n", sdata->dev->name);
445 return;
446 }
447 skb_reserve(skb, local->hw.extra_tx_headroom);
448
449 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
450 memset(mgmt, 0, 24);
451 memcpy(mgmt->da, bssid, ETH_ALEN);
452 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
453 memcpy(mgmt->bssid, bssid, ETH_ALEN);
454 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
455 skb_put(skb, 2);
456 /* u.deauth.reason_code == u.disassoc.reason_code */
457 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
458
459 if (stype == IEEE80211_STYPE_DEAUTH)
460 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, cookie);
461 else
462 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len, cookie);
463 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
464 }
465
466 void ieee80211_send_pspoll(struct ieee80211_local *local,
467 struct ieee80211_sub_if_data *sdata)
468 {
469 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
470 struct ieee80211_pspoll *pspoll;
471 struct sk_buff *skb;
472 u16 fc;
473
474 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
475 if (!skb) {
476 printk(KERN_DEBUG "%s: failed to allocate buffer for "
477 "pspoll frame\n", sdata->dev->name);
478 return;
479 }
480 skb_reserve(skb, local->hw.extra_tx_headroom);
481
482 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
483 memset(pspoll, 0, sizeof(*pspoll));
484 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
485 pspoll->frame_control = cpu_to_le16(fc);
486 pspoll->aid = cpu_to_le16(ifmgd->aid);
487
488 /* aid in PS-Poll has its two MSBs each set to 1 */
489 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
490
491 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
492 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
493
494 ieee80211_tx_skb(sdata, skb, 0);
495 }
496
497 void ieee80211_send_nullfunc(struct ieee80211_local *local,
498 struct ieee80211_sub_if_data *sdata,
499 int powersave)
500 {
501 struct sk_buff *skb;
502 struct ieee80211_hdr *nullfunc;
503 __le16 fc;
504
505 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
506 return;
507
508 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
509 if (!skb) {
510 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
511 "frame\n", sdata->dev->name);
512 return;
513 }
514 skb_reserve(skb, local->hw.extra_tx_headroom);
515
516 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
517 memset(nullfunc, 0, 24);
518 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
519 IEEE80211_FCTL_TODS);
520 if (powersave)
521 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
522 nullfunc->frame_control = fc;
523 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
524 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
525 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
526
527 ieee80211_tx_skb(sdata, skb, 0);
528 }
529
530 /* spectrum management related things */
531 static void ieee80211_chswitch_work(struct work_struct *work)
532 {
533 struct ieee80211_sub_if_data *sdata =
534 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
535 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
536
537 if (!netif_running(sdata->dev))
538 return;
539
540 mutex_lock(&ifmgd->mtx);
541 if (!ifmgd->associated)
542 goto out;
543
544 sdata->local->oper_channel = sdata->local->csa_channel;
545 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
546
547 /* XXX: shouldn't really modify cfg80211-owned data! */
548 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
549
550 ieee80211_wake_queues_by_reason(&sdata->local->hw,
551 IEEE80211_QUEUE_STOP_REASON_CSA);
552 out:
553 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
554 mutex_unlock(&ifmgd->mtx);
555 }
556
557 static void ieee80211_chswitch_timer(unsigned long data)
558 {
559 struct ieee80211_sub_if_data *sdata =
560 (struct ieee80211_sub_if_data *) data;
561 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
562
563 if (sdata->local->quiescing) {
564 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
565 return;
566 }
567
568 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
569 }
570
571 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
572 struct ieee80211_channel_sw_ie *sw_elem,
573 struct ieee80211_bss *bss)
574 {
575 struct ieee80211_channel *new_ch;
576 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
577 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
578
579 ASSERT_MGD_MTX(ifmgd);
580
581 if (!ifmgd->associated)
582 return;
583
584 if (sdata->local->scanning)
585 return;
586
587 /* Disregard subsequent beacons if we are already running a timer
588 processing a CSA */
589
590 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
591 return;
592
593 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
594 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
595 return;
596
597 sdata->local->csa_channel = new_ch;
598
599 if (sw_elem->count <= 1) {
600 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
601 } else {
602 ieee80211_stop_queues_by_reason(&sdata->local->hw,
603 IEEE80211_QUEUE_STOP_REASON_CSA);
604 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
605 mod_timer(&ifmgd->chswitch_timer,
606 jiffies +
607 msecs_to_jiffies(sw_elem->count *
608 bss->cbss.beacon_interval));
609 }
610 }
611
612 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
613 u16 capab_info, u8 *pwr_constr_elem,
614 u8 pwr_constr_elem_len)
615 {
616 struct ieee80211_conf *conf = &sdata->local->hw.conf;
617
618 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
619 return;
620
621 /* Power constraint IE length should be 1 octet */
622 if (pwr_constr_elem_len != 1)
623 return;
624
625 if ((*pwr_constr_elem <= conf->channel->max_power) &&
626 (*pwr_constr_elem != sdata->local->power_constr_level)) {
627 sdata->local->power_constr_level = *pwr_constr_elem;
628 ieee80211_hw_config(sdata->local, 0);
629 }
630 }
631
632 /* powersave */
633 static void ieee80211_enable_ps(struct ieee80211_local *local,
634 struct ieee80211_sub_if_data *sdata)
635 {
636 struct ieee80211_conf *conf = &local->hw.conf;
637
638 /*
639 * If we are scanning right now then the parameters will
640 * take effect when scan finishes.
641 */
642 if (local->scanning)
643 return;
644
645 if (conf->dynamic_ps_timeout > 0 &&
646 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
647 mod_timer(&local->dynamic_ps_timer, jiffies +
648 msecs_to_jiffies(conf->dynamic_ps_timeout));
649 } else {
650 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
651 ieee80211_send_nullfunc(local, sdata, 1);
652 conf->flags |= IEEE80211_CONF_PS;
653 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
654 }
655 }
656
657 static void ieee80211_change_ps(struct ieee80211_local *local)
658 {
659 struct ieee80211_conf *conf = &local->hw.conf;
660
661 if (local->ps_sdata) {
662 ieee80211_enable_ps(local, local->ps_sdata);
663 } else if (conf->flags & IEEE80211_CONF_PS) {
664 conf->flags &= ~IEEE80211_CONF_PS;
665 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
666 del_timer_sync(&local->dynamic_ps_timer);
667 cancel_work_sync(&local->dynamic_ps_enable_work);
668 }
669 }
670
671 /* need to hold RTNL or interface lock */
672 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
673 {
674 struct ieee80211_sub_if_data *sdata, *found = NULL;
675 int count = 0;
676
677 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
678 local->ps_sdata = NULL;
679 return;
680 }
681
682 list_for_each_entry(sdata, &local->interfaces, list) {
683 if (!netif_running(sdata->dev))
684 continue;
685 if (sdata->vif.type != NL80211_IFTYPE_STATION)
686 continue;
687 found = sdata;
688 count++;
689 }
690
691 if (count == 1 && found->u.mgd.powersave &&
692 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
693 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
694 IEEE80211_STA_CONNECTION_POLL))) {
695 s32 beaconint_us;
696
697 if (latency < 0)
698 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
699
700 beaconint_us = ieee80211_tu_to_usec(
701 found->vif.bss_conf.beacon_int);
702
703 if (beaconint_us > latency) {
704 local->ps_sdata = NULL;
705 } else {
706 u8 dtimper = found->vif.bss_conf.dtim_period;
707 int maxslp = 1;
708
709 if (dtimper > 1)
710 maxslp = min_t(int, dtimper,
711 latency / beaconint_us);
712
713 local->hw.conf.max_sleep_period = maxslp;
714 local->ps_sdata = found;
715 }
716 } else {
717 local->ps_sdata = NULL;
718 }
719
720 ieee80211_change_ps(local);
721 }
722
723 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
724 {
725 struct ieee80211_local *local =
726 container_of(work, struct ieee80211_local,
727 dynamic_ps_disable_work);
728
729 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
730 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
731 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
732 }
733
734 ieee80211_wake_queues_by_reason(&local->hw,
735 IEEE80211_QUEUE_STOP_REASON_PS);
736 }
737
738 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
739 {
740 struct ieee80211_local *local =
741 container_of(work, struct ieee80211_local,
742 dynamic_ps_enable_work);
743 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
744
745 /* can only happen when PS was just disabled anyway */
746 if (!sdata)
747 return;
748
749 if (local->hw.conf.flags & IEEE80211_CONF_PS)
750 return;
751
752 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
753 ieee80211_send_nullfunc(local, sdata, 1);
754
755 local->hw.conf.flags |= IEEE80211_CONF_PS;
756 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
757 }
758
759 void ieee80211_dynamic_ps_timer(unsigned long data)
760 {
761 struct ieee80211_local *local = (void *) data;
762
763 if (local->quiescing)
764 return;
765
766 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
767 }
768
769 /* MLME */
770 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
771 struct ieee80211_if_managed *ifmgd,
772 u8 *wmm_param, size_t wmm_param_len)
773 {
774 struct ieee80211_tx_queue_params params;
775 size_t left;
776 int count;
777 u8 *pos;
778
779 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
780 return;
781
782 if (!wmm_param)
783 return;
784
785 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
786 return;
787 count = wmm_param[6] & 0x0f;
788 if (count == ifmgd->wmm_last_param_set)
789 return;
790 ifmgd->wmm_last_param_set = count;
791
792 pos = wmm_param + 8;
793 left = wmm_param_len - 8;
794
795 memset(&params, 0, sizeof(params));
796
797 local->wmm_acm = 0;
798 for (; left >= 4; left -= 4, pos += 4) {
799 int aci = (pos[0] >> 5) & 0x03;
800 int acm = (pos[0] >> 4) & 0x01;
801 int queue;
802
803 switch (aci) {
804 case 1: /* AC_BK */
805 queue = 3;
806 if (acm)
807 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
808 break;
809 case 2: /* AC_VI */
810 queue = 1;
811 if (acm)
812 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
813 break;
814 case 3: /* AC_VO */
815 queue = 0;
816 if (acm)
817 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
818 break;
819 case 0: /* AC_BE */
820 default:
821 queue = 2;
822 if (acm)
823 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
824 break;
825 }
826
827 params.aifs = pos[0] & 0x0f;
828 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
829 params.cw_min = ecw2cw(pos[1] & 0x0f);
830 params.txop = get_unaligned_le16(pos + 2);
831 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
832 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
833 "cWmin=%d cWmax=%d txop=%d\n",
834 wiphy_name(local->hw.wiphy), queue, aci, acm,
835 params.aifs, params.cw_min, params.cw_max, params.txop);
836 #endif
837 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
838 printk(KERN_DEBUG "%s: failed to set TX queue "
839 "parameters for queue %d\n",
840 wiphy_name(local->hw.wiphy), queue);
841 }
842 }
843
844 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
845 u16 capab, bool erp_valid, u8 erp)
846 {
847 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
848 u32 changed = 0;
849 bool use_protection;
850 bool use_short_preamble;
851 bool use_short_slot;
852
853 if (erp_valid) {
854 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
855 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
856 } else {
857 use_protection = false;
858 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
859 }
860
861 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
862
863 if (use_protection != bss_conf->use_cts_prot) {
864 bss_conf->use_cts_prot = use_protection;
865 changed |= BSS_CHANGED_ERP_CTS_PROT;
866 }
867
868 if (use_short_preamble != bss_conf->use_short_preamble) {
869 bss_conf->use_short_preamble = use_short_preamble;
870 changed |= BSS_CHANGED_ERP_PREAMBLE;
871 }
872
873 if (use_short_slot != bss_conf->use_short_slot) {
874 bss_conf->use_short_slot = use_short_slot;
875 changed |= BSS_CHANGED_ERP_SLOT;
876 }
877
878 return changed;
879 }
880
881 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
882 struct ieee80211_bss *bss,
883 u32 bss_info_changed)
884 {
885 struct ieee80211_local *local = sdata->local;
886
887 bss_info_changed |= BSS_CHANGED_ASSOC;
888 /* set timing information */
889 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
890 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
891 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
892
893 bss_info_changed |= BSS_CHANGED_BEACON_INT;
894 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
895 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
896
897 sdata->u.mgd.associated = bss;
898 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
899
900 /* just to be sure */
901 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
902 IEEE80211_STA_BEACON_POLL);
903
904 ieee80211_led_assoc(local, 1);
905
906 sdata->vif.bss_conf.assoc = 1;
907 /*
908 * For now just always ask the driver to update the basic rateset
909 * when we have associated, we aren't checking whether it actually
910 * changed or not.
911 */
912 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
913
914 /* And the BSSID changed - we're associated now */
915 bss_info_changed |= BSS_CHANGED_BSSID;
916
917 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
918
919 /* will be same as sdata */
920 if (local->ps_sdata) {
921 mutex_lock(&local->iflist_mtx);
922 ieee80211_recalc_ps(local, -1);
923 mutex_unlock(&local->iflist_mtx);
924 }
925
926 netif_tx_start_all_queues(sdata->dev);
927 netif_carrier_on(sdata->dev);
928 }
929
930 static enum rx_mgmt_action __must_check
931 ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
932 struct ieee80211_mgd_work *wk)
933 {
934 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
935 struct ieee80211_local *local = sdata->local;
936
937 wk->tries++;
938 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
939 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
940 sdata->dev->name, wk->bss->cbss.bssid);
941
942 /*
943 * Most likely AP is not in the range so remove the
944 * bss struct for that AP.
945 */
946 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
947
948 /*
949 * We might have a pending scan which had no chance to run yet
950 * due to work needing to be done. Hence, queue the STAs work
951 * again for that.
952 */
953 queue_work(local->hw.workqueue, &ifmgd->work);
954 return RX_MGMT_CFG80211_AUTH_TO;
955 }
956
957 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
958 sdata->dev->name, wk->bss->cbss.bssid,
959 wk->tries);
960
961 /*
962 * Direct probe is sent to broadcast address as some APs
963 * will not answer to direct packet in unassociated state.
964 */
965 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
966
967 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
968 run_again(ifmgd, wk->timeout);
969
970 return RX_MGMT_NONE;
971 }
972
973
974 static enum rx_mgmt_action __must_check
975 ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
976 struct ieee80211_mgd_work *wk)
977 {
978 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
979 struct ieee80211_local *local = sdata->local;
980
981 wk->tries++;
982 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
983 printk(KERN_DEBUG "%s: authentication with AP %pM"
984 " timed out\n",
985 sdata->dev->name, wk->bss->cbss.bssid);
986
987 /*
988 * Most likely AP is not in the range so remove the
989 * bss struct for that AP.
990 */
991 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
992
993 /*
994 * We might have a pending scan which had no chance to run yet
995 * due to work needing to be done. Hence, queue the STAs work
996 * again for that.
997 */
998 queue_work(local->hw.workqueue, &ifmgd->work);
999 return RX_MGMT_CFG80211_AUTH_TO;
1000 }
1001
1002 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
1003 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1004
1005 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
1006 wk->bss->cbss.bssid, NULL, 0, 0);
1007 wk->auth_transaction = 2;
1008
1009 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
1010 run_again(ifmgd, wk->timeout);
1011
1012 return RX_MGMT_NONE;
1013 }
1014
1015 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata)
1016 {
1017 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1018 struct ieee80211_local *local = sdata->local;
1019 struct sta_info *sta;
1020 u32 changed = 0, config_changed = 0;
1021 u8 bssid[ETH_ALEN];
1022
1023 ASSERT_MGD_MTX(ifmgd);
1024
1025 if (WARN_ON(!ifmgd->associated))
1026 return;
1027
1028 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1029
1030 ifmgd->associated = NULL;
1031 memset(ifmgd->bssid, 0, ETH_ALEN);
1032
1033 /*
1034 * we need to commit the associated = NULL change because the
1035 * scan code uses that to determine whether this iface should
1036 * go to/wake up from powersave or not -- and could otherwise
1037 * wake the queues erroneously.
1038 */
1039 smp_mb();
1040
1041 /*
1042 * Thus, we can only afterwards stop the queues -- to account
1043 * for the case where another CPU is finishing a scan at this
1044 * time -- we don't want the scan code to enable queues.
1045 */
1046
1047 netif_tx_stop_all_queues(sdata->dev);
1048 netif_carrier_off(sdata->dev);
1049
1050 rcu_read_lock();
1051 sta = sta_info_get(local, bssid);
1052 if (sta)
1053 ieee80211_sta_tear_down_BA_sessions(sta);
1054 rcu_read_unlock();
1055
1056 changed |= ieee80211_reset_erp_info(sdata);
1057
1058 ieee80211_led_assoc(local, 0);
1059 changed |= BSS_CHANGED_ASSOC;
1060 sdata->vif.bss_conf.assoc = false;
1061
1062 ieee80211_set_wmm_default(sdata);
1063
1064 ieee80211_recalc_idle(local);
1065
1066 /* channel(_type) changes are handled by ieee80211_hw_config */
1067 local->oper_channel_type = NL80211_CHAN_NO_HT;
1068
1069 /* on the next assoc, re-program HT parameters */
1070 sdata->ht_opmode_valid = false;
1071
1072 local->power_constr_level = 0;
1073
1074 del_timer_sync(&local->dynamic_ps_timer);
1075 cancel_work_sync(&local->dynamic_ps_enable_work);
1076
1077 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1078 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1079 config_changed |= IEEE80211_CONF_CHANGE_PS;
1080 }
1081
1082 ieee80211_hw_config(local, config_changed);
1083
1084 /* And the BSSID changed -- not very interesting here */
1085 changed |= BSS_CHANGED_BSSID;
1086 ieee80211_bss_info_change_notify(sdata, changed);
1087
1088 rcu_read_lock();
1089
1090 sta = sta_info_get(local, bssid);
1091 if (!sta) {
1092 rcu_read_unlock();
1093 return;
1094 }
1095
1096 sta_info_unlink(&sta);
1097
1098 rcu_read_unlock();
1099
1100 sta_info_destroy(sta);
1101 }
1102
1103 static enum rx_mgmt_action __must_check
1104 ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1105 struct ieee80211_mgd_work *wk)
1106 {
1107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1108 struct ieee80211_local *local = sdata->local;
1109
1110 wk->tries++;
1111 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
1112 printk(KERN_DEBUG "%s: association with AP %pM"
1113 " timed out\n",
1114 sdata->dev->name, wk->bss->cbss.bssid);
1115
1116 /*
1117 * Most likely AP is not in the range so remove the
1118 * bss struct for that AP.
1119 */
1120 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1121
1122 /*
1123 * We might have a pending scan which had no chance to run yet
1124 * due to work needing to be done. Hence, queue the STAs work
1125 * again for that.
1126 */
1127 queue_work(local->hw.workqueue, &ifmgd->work);
1128 return RX_MGMT_CFG80211_ASSOC_TO;
1129 }
1130
1131 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1132 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1133 ieee80211_send_assoc(sdata, wk);
1134
1135 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
1136 run_again(ifmgd, wk->timeout);
1137
1138 return RX_MGMT_NONE;
1139 }
1140
1141 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1142 struct ieee80211_hdr *hdr)
1143 {
1144 /*
1145 * We can postpone the mgd.timer whenever receiving unicast frames
1146 * from AP because we know that the connection is working both ways
1147 * at that time. But multicast frames (and hence also beacons) must
1148 * be ignored here, because we need to trigger the timer during
1149 * data idle periods for sending the periodic probe request to the
1150 * AP we're connected to.
1151 */
1152 if (is_multicast_ether_addr(hdr->addr1))
1153 return;
1154
1155 mod_timer(&sdata->u.mgd.conn_mon_timer,
1156 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
1157 }
1158
1159 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1160 bool beacon)
1161 {
1162 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1163 const u8 *ssid;
1164 bool already = false;
1165
1166 if (!netif_running(sdata->dev))
1167 return;
1168
1169 mutex_lock(&ifmgd->mtx);
1170
1171 if (!ifmgd->associated)
1172 goto out;
1173
1174 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1175 if (beacon && net_ratelimit())
1176 printk(KERN_DEBUG "%s: detected beacon loss from AP "
1177 "- sending probe request\n", sdata->dev->name);
1178 #endif
1179
1180 /*
1181 * The driver/our work has already reported this event or the
1182 * connection monitoring has kicked in and we have already sent
1183 * a probe request. Or maybe the AP died and the driver keeps
1184 * reporting until we disassociate...
1185 *
1186 * In either case we have to ignore the current call to this
1187 * function (except for setting the correct probe reason bit)
1188 * because otherwise we would reset the timer every time and
1189 * never check whether we received a probe response!
1190 */
1191 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1192 IEEE80211_STA_CONNECTION_POLL))
1193 already = true;
1194
1195 if (beacon)
1196 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1197 else
1198 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1199
1200 if (already)
1201 goto out;
1202
1203 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1204
1205 mutex_lock(&sdata->local->iflist_mtx);
1206 ieee80211_recalc_ps(sdata->local, -1);
1207 mutex_unlock(&sdata->local->iflist_mtx);
1208
1209 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1210 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1211 ssid + 2, ssid[1], NULL, 0);
1212
1213 run_again(ifmgd, ifmgd->probe_timeout);
1214
1215 out:
1216 mutex_unlock(&ifmgd->mtx);
1217 }
1218
1219 void ieee80211_beacon_loss_work(struct work_struct *work)
1220 {
1221 struct ieee80211_sub_if_data *sdata =
1222 container_of(work, struct ieee80211_sub_if_data,
1223 u.mgd.beacon_loss_work);
1224
1225 ieee80211_mgd_probe_ap(sdata, true);
1226 }
1227
1228 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1229 {
1230 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1231
1232 queue_work(sdata->local->hw.workqueue,
1233 &sdata->u.mgd.beacon_loss_work);
1234 }
1235 EXPORT_SYMBOL(ieee80211_beacon_loss);
1236
1237 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1238 struct ieee80211_mgd_work *wk)
1239 {
1240 wk->state = IEEE80211_MGD_STATE_IDLE;
1241 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1242 }
1243
1244
1245 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1246 struct ieee80211_mgd_work *wk,
1247 struct ieee80211_mgmt *mgmt,
1248 size_t len)
1249 {
1250 u8 *pos;
1251 struct ieee802_11_elems elems;
1252
1253 pos = mgmt->u.auth.variable;
1254 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1255 if (!elems.challenge)
1256 return;
1257 ieee80211_send_auth(sdata, 3, wk->auth_alg,
1258 elems.challenge - 2, elems.challenge_len + 2,
1259 wk->bss->cbss.bssid,
1260 wk->key, wk->key_len, wk->key_idx);
1261 wk->auth_transaction = 4;
1262 }
1263
1264 static enum rx_mgmt_action __must_check
1265 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1266 struct ieee80211_mgd_work *wk,
1267 struct ieee80211_mgmt *mgmt, size_t len)
1268 {
1269 u16 auth_alg, auth_transaction, status_code;
1270
1271 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1272 return RX_MGMT_NONE;
1273
1274 if (len < 24 + 6)
1275 return RX_MGMT_NONE;
1276
1277 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1278 return RX_MGMT_NONE;
1279
1280 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1281 return RX_MGMT_NONE;
1282
1283 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1284 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1285 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1286
1287 if (auth_alg != wk->auth_alg ||
1288 auth_transaction != wk->auth_transaction)
1289 return RX_MGMT_NONE;
1290
1291 if (status_code != WLAN_STATUS_SUCCESS) {
1292 list_del(&wk->list);
1293 kfree(wk);
1294 return RX_MGMT_CFG80211_AUTH;
1295 }
1296
1297 switch (wk->auth_alg) {
1298 case WLAN_AUTH_OPEN:
1299 case WLAN_AUTH_LEAP:
1300 case WLAN_AUTH_FT:
1301 ieee80211_auth_completed(sdata, wk);
1302 return RX_MGMT_CFG80211_AUTH;
1303 case WLAN_AUTH_SHARED_KEY:
1304 if (wk->auth_transaction == 4) {
1305 ieee80211_auth_completed(sdata, wk);
1306 return RX_MGMT_CFG80211_AUTH;
1307 } else
1308 ieee80211_auth_challenge(sdata, wk, mgmt, len);
1309 break;
1310 }
1311
1312 return RX_MGMT_NONE;
1313 }
1314
1315
1316 static enum rx_mgmt_action __must_check
1317 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1318 struct ieee80211_mgd_work *wk,
1319 struct ieee80211_mgmt *mgmt, size_t len)
1320 {
1321 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1322 const u8 *bssid = NULL;
1323 u16 reason_code;
1324
1325 if (len < 24 + 2)
1326 return RX_MGMT_NONE;
1327
1328 ASSERT_MGD_MTX(ifmgd);
1329
1330 if (wk)
1331 bssid = wk->bss->cbss.bssid;
1332 else
1333 bssid = ifmgd->associated->cbss.bssid;
1334
1335 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1336
1337 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1338 sdata->dev->name, bssid, reason_code);
1339
1340 if (!wk) {
1341 ieee80211_set_disassoc(sdata);
1342 } else {
1343 list_del(&wk->list);
1344 kfree(wk);
1345 }
1346
1347 return RX_MGMT_CFG80211_DEAUTH;
1348 }
1349
1350
1351 static enum rx_mgmt_action __must_check
1352 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1353 struct ieee80211_mgmt *mgmt, size_t len)
1354 {
1355 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1356 u16 reason_code;
1357
1358 if (len < 24 + 2)
1359 return RX_MGMT_NONE;
1360
1361 ASSERT_MGD_MTX(ifmgd);
1362
1363 if (WARN_ON(!ifmgd->associated))
1364 return RX_MGMT_NONE;
1365
1366 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1367 return RX_MGMT_NONE;
1368
1369 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1370
1371 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1372 sdata->dev->name, reason_code);
1373
1374 ieee80211_set_disassoc(sdata);
1375 return RX_MGMT_CFG80211_DISASSOC;
1376 }
1377
1378
1379 static enum rx_mgmt_action __must_check
1380 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1381 struct ieee80211_mgd_work *wk,
1382 struct ieee80211_mgmt *mgmt, size_t len,
1383 bool reassoc)
1384 {
1385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1386 struct ieee80211_local *local = sdata->local;
1387 struct ieee80211_supported_band *sband;
1388 struct sta_info *sta;
1389 u32 rates, basic_rates;
1390 u16 capab_info, status_code, aid;
1391 struct ieee802_11_elems elems;
1392 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1393 u8 *pos;
1394 u32 changed = 0;
1395 int i, j;
1396 bool have_higher_than_11mbit = false, newsta = false;
1397 u16 ap_ht_cap_flags;
1398
1399 /*
1400 * AssocResp and ReassocResp have identical structure, so process both
1401 * of them in this function.
1402 */
1403
1404 if (len < 24 + 6)
1405 return RX_MGMT_NONE;
1406
1407 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1408 return RX_MGMT_NONE;
1409
1410 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1411 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1412 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1413
1414 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1415 "status=%d aid=%d)\n",
1416 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1417 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1418
1419 pos = mgmt->u.assoc_resp.variable;
1420 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1421
1422 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1423 elems.timeout_int && elems.timeout_int_len == 5 &&
1424 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1425 u32 tu, ms;
1426 tu = get_unaligned_le32(elems.timeout_int + 1);
1427 ms = tu * 1024 / 1000;
1428 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1429 "comeback duration %u TU (%u ms)\n",
1430 sdata->dev->name, tu, ms);
1431 wk->timeout = jiffies + msecs_to_jiffies(ms);
1432 if (ms > IEEE80211_ASSOC_TIMEOUT)
1433 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
1434 return RX_MGMT_NONE;
1435 }
1436
1437 if (status_code != WLAN_STATUS_SUCCESS) {
1438 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1439 sdata->dev->name, status_code);
1440 list_del(&wk->list);
1441 kfree(wk);
1442 return RX_MGMT_CFG80211_ASSOC;
1443 }
1444
1445 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1446 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1447 "set\n", sdata->dev->name, aid);
1448 aid &= ~(BIT(15) | BIT(14));
1449
1450 if (!elems.supp_rates) {
1451 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1452 sdata->dev->name);
1453 return RX_MGMT_NONE;
1454 }
1455
1456 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1457 ifmgd->aid = aid;
1458
1459 rcu_read_lock();
1460
1461 /* Add STA entry for the AP */
1462 sta = sta_info_get(local, wk->bss->cbss.bssid);
1463 if (!sta) {
1464 newsta = true;
1465
1466 rcu_read_unlock();
1467
1468 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
1469 if (!sta) {
1470 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1471 " the AP\n", sdata->dev->name);
1472 return RX_MGMT_NONE;
1473 }
1474
1475 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1476 WLAN_STA_ASSOC_AP);
1477 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1478 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1479
1480 rcu_read_lock();
1481 }
1482
1483 rates = 0;
1484 basic_rates = 0;
1485 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1486
1487 for (i = 0; i < elems.supp_rates_len; i++) {
1488 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1489 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1490
1491 if (rate > 110)
1492 have_higher_than_11mbit = true;
1493
1494 for (j = 0; j < sband->n_bitrates; j++) {
1495 if (sband->bitrates[j].bitrate == rate) {
1496 rates |= BIT(j);
1497 if (is_basic)
1498 basic_rates |= BIT(j);
1499 break;
1500 }
1501 }
1502 }
1503
1504 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1505 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1506 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1507
1508 if (rate > 110)
1509 have_higher_than_11mbit = true;
1510
1511 for (j = 0; j < sband->n_bitrates; j++) {
1512 if (sband->bitrates[j].bitrate == rate) {
1513 rates |= BIT(j);
1514 if (is_basic)
1515 basic_rates |= BIT(j);
1516 break;
1517 }
1518 }
1519 }
1520
1521 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1522 sdata->vif.bss_conf.basic_rates = basic_rates;
1523
1524 /* cf. IEEE 802.11 9.2.12 */
1525 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1526 have_higher_than_11mbit)
1527 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1528 else
1529 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1530
1531 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1532 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1533 elems.ht_cap_elem, &sta->sta.ht_cap);
1534
1535 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1536
1537 rate_control_rate_init(sta);
1538
1539 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1540 set_sta_flags(sta, WLAN_STA_MFP);
1541
1542 if (elems.wmm_param)
1543 set_sta_flags(sta, WLAN_STA_WME);
1544
1545 if (newsta) {
1546 int err = sta_info_insert(sta);
1547 if (err) {
1548 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1549 " the AP (error %d)\n", sdata->dev->name, err);
1550 rcu_read_unlock();
1551 return RX_MGMT_NONE;
1552 }
1553 }
1554
1555 rcu_read_unlock();
1556
1557 if (elems.wmm_param)
1558 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1559 elems.wmm_param_len);
1560 else
1561 ieee80211_set_wmm_default(sdata);
1562
1563 if (elems.ht_info_elem && elems.wmm_param &&
1564 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1565 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1566 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1567 wk->bss->cbss.bssid,
1568 ap_ht_cap_flags);
1569
1570 /* set AID and assoc capability,
1571 * ieee80211_set_associated() will tell the driver */
1572 bss_conf->aid = aid;
1573 bss_conf->assoc_capability = capab_info;
1574 ieee80211_set_associated(sdata, wk->bss, changed);
1575
1576 /*
1577 * Start timer to probe the connection to the AP now.
1578 * Also start the timer that will detect beacon loss.
1579 */
1580 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1581 mod_beacon_timer(sdata);
1582
1583 list_del(&wk->list);
1584 kfree(wk);
1585 return RX_MGMT_CFG80211_ASSOC;
1586 }
1587
1588
1589 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1590 struct ieee80211_mgmt *mgmt,
1591 size_t len,
1592 struct ieee80211_rx_status *rx_status,
1593 struct ieee802_11_elems *elems,
1594 bool beacon)
1595 {
1596 struct ieee80211_local *local = sdata->local;
1597 int freq;
1598 struct ieee80211_bss *bss;
1599 struct ieee80211_channel *channel;
1600
1601 if (elems->ds_params && elems->ds_params_len == 1)
1602 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1603 else
1604 freq = rx_status->freq;
1605
1606 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1607
1608 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1609 return;
1610
1611 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1612 channel, beacon);
1613 if (bss)
1614 ieee80211_rx_bss_put(local, bss);
1615
1616 if (!sdata->u.mgd.associated)
1617 return;
1618
1619 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1620 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1621 ETH_ALEN) == 0)) {
1622 struct ieee80211_channel_sw_ie *sw_elem =
1623 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1624 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1625 }
1626 }
1627
1628
1629 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1630 struct ieee80211_mgd_work *wk,
1631 struct ieee80211_mgmt *mgmt, size_t len,
1632 struct ieee80211_rx_status *rx_status)
1633 {
1634 struct ieee80211_if_managed *ifmgd;
1635 size_t baselen;
1636 struct ieee802_11_elems elems;
1637
1638 ifmgd = &sdata->u.mgd;
1639
1640 ASSERT_MGD_MTX(ifmgd);
1641
1642 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1643 return; /* ignore ProbeResp to foreign address */
1644
1645 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1646 if (baselen > len)
1647 return;
1648
1649 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1650 &elems);
1651
1652 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1653
1654 /* direct probe may be part of the association flow */
1655 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
1656 printk(KERN_DEBUG "%s direct probe responded\n",
1657 sdata->dev->name);
1658 wk->tries = 0;
1659 wk->state = IEEE80211_MGD_STATE_AUTH;
1660 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
1661 }
1662
1663 if (ifmgd->associated &&
1664 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
1665 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1666 IEEE80211_STA_CONNECTION_POLL)) {
1667 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1668 IEEE80211_STA_BEACON_POLL);
1669 mutex_lock(&sdata->local->iflist_mtx);
1670 ieee80211_recalc_ps(sdata->local, -1);
1671 mutex_unlock(&sdata->local->iflist_mtx);
1672 /*
1673 * We've received a probe response, but are not sure whether
1674 * we have or will be receiving any beacons or data, so let's
1675 * schedule the timers again, just in case.
1676 */
1677 mod_beacon_timer(sdata);
1678 mod_timer(&ifmgd->conn_mon_timer,
1679 round_jiffies_up(jiffies +
1680 IEEE80211_CONNECTION_IDLE_TIME));
1681 }
1682 }
1683
1684 /*
1685 * This is the canonical list of information elements we care about,
1686 * the filter code also gives us all changes to the Microsoft OUI
1687 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1688 *
1689 * We implement beacon filtering in software since that means we can
1690 * avoid processing the frame here and in cfg80211, and userspace
1691 * will not be able to tell whether the hardware supports it or not.
1692 *
1693 * XXX: This list needs to be dynamic -- userspace needs to be able to
1694 * add items it requires. It also needs to be able to tell us to
1695 * look out for other vendor IEs.
1696 */
1697 static const u64 care_about_ies =
1698 (1ULL << WLAN_EID_COUNTRY) |
1699 (1ULL << WLAN_EID_ERP_INFO) |
1700 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1701 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1702 (1ULL << WLAN_EID_HT_CAPABILITY) |
1703 (1ULL << WLAN_EID_HT_INFORMATION);
1704
1705 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1706 struct ieee80211_mgmt *mgmt,
1707 size_t len,
1708 struct ieee80211_rx_status *rx_status)
1709 {
1710 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1711 size_t baselen;
1712 struct ieee802_11_elems elems;
1713 struct ieee80211_local *local = sdata->local;
1714 u32 changed = 0;
1715 bool erp_valid, directed_tim = false;
1716 u8 erp_value = 0;
1717 u32 ncrc;
1718 u8 *bssid;
1719
1720 ASSERT_MGD_MTX(ifmgd);
1721
1722 /* Process beacon from the current BSS */
1723 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1724 if (baselen > len)
1725 return;
1726
1727 if (rx_status->freq != local->hw.conf.channel->center_freq)
1728 return;
1729
1730 /*
1731 * We might have received a number of frames, among them a
1732 * disassoc frame and a beacon...
1733 */
1734 if (!ifmgd->associated)
1735 return;
1736
1737 bssid = ifmgd->associated->cbss.bssid;
1738
1739 /*
1740 * And in theory even frames from a different AP we were just
1741 * associated to a split-second ago!
1742 */
1743 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1744 return;
1745
1746 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1747 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1748 if (net_ratelimit()) {
1749 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1750 "to a received beacon\n", sdata->dev->name);
1751 }
1752 #endif
1753 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1754 mutex_lock(&local->iflist_mtx);
1755 ieee80211_recalc_ps(local, -1);
1756 mutex_unlock(&local->iflist_mtx);
1757 }
1758
1759 /*
1760 * Push the beacon loss detection into the future since
1761 * we are processing a beacon from the AP just now.
1762 */
1763 mod_beacon_timer(sdata);
1764
1765 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1766 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1767 len - baselen, &elems,
1768 care_about_ies, ncrc);
1769
1770 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1771 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1772 ifmgd->aid);
1773
1774 if (ncrc != ifmgd->beacon_crc) {
1775 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1776 true);
1777
1778 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1779 elems.wmm_param_len);
1780 }
1781
1782 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1783 if (directed_tim) {
1784 if (local->hw.conf.dynamic_ps_timeout > 0) {
1785 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1786 ieee80211_hw_config(local,
1787 IEEE80211_CONF_CHANGE_PS);
1788 ieee80211_send_nullfunc(local, sdata, 0);
1789 } else {
1790 local->pspolling = true;
1791
1792 /*
1793 * Here is assumed that the driver will be
1794 * able to send ps-poll frame and receive a
1795 * response even though power save mode is
1796 * enabled, but some drivers might require
1797 * to disable power save here. This needs
1798 * to be investigated.
1799 */
1800 ieee80211_send_pspoll(local, sdata);
1801 }
1802 }
1803 }
1804
1805 if (ncrc == ifmgd->beacon_crc)
1806 return;
1807 ifmgd->beacon_crc = ncrc;
1808
1809 if (elems.erp_info && elems.erp_info_len >= 1) {
1810 erp_valid = true;
1811 erp_value = elems.erp_info[0];
1812 } else {
1813 erp_valid = false;
1814 }
1815 changed |= ieee80211_handle_bss_capability(sdata,
1816 le16_to_cpu(mgmt->u.beacon.capab_info),
1817 erp_valid, erp_value);
1818
1819
1820 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1821 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1822 struct sta_info *sta;
1823 struct ieee80211_supported_band *sband;
1824 u16 ap_ht_cap_flags;
1825
1826 rcu_read_lock();
1827
1828 sta = sta_info_get(local, bssid);
1829 if (WARN_ON(!sta)) {
1830 rcu_read_unlock();
1831 return;
1832 }
1833
1834 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1835
1836 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1837 elems.ht_cap_elem, &sta->sta.ht_cap);
1838
1839 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1840
1841 rcu_read_unlock();
1842
1843 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1844 bssid, ap_ht_cap_flags);
1845 }
1846
1847 if (elems.country_elem) {
1848 /* Note we are only reviewing this on beacons
1849 * for the BSSID we are associated to */
1850 regulatory_hint_11d(local->hw.wiphy,
1851 elems.country_elem, elems.country_elem_len);
1852
1853 /* TODO: IBSS also needs this */
1854 if (elems.pwr_constr_elem)
1855 ieee80211_handle_pwr_constr(sdata,
1856 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1857 elems.pwr_constr_elem,
1858 elems.pwr_constr_elem_len);
1859 }
1860
1861 ieee80211_bss_info_change_notify(sdata, changed);
1862 }
1863
1864 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1865 struct sk_buff *skb)
1866 {
1867 struct ieee80211_local *local = sdata->local;
1868 struct ieee80211_mgmt *mgmt;
1869 u16 fc;
1870
1871 if (skb->len < 24)
1872 return RX_DROP_MONITOR;
1873
1874 mgmt = (struct ieee80211_mgmt *) skb->data;
1875 fc = le16_to_cpu(mgmt->frame_control);
1876
1877 switch (fc & IEEE80211_FCTL_STYPE) {
1878 case IEEE80211_STYPE_PROBE_REQ:
1879 case IEEE80211_STYPE_PROBE_RESP:
1880 case IEEE80211_STYPE_BEACON:
1881 case IEEE80211_STYPE_AUTH:
1882 case IEEE80211_STYPE_ASSOC_RESP:
1883 case IEEE80211_STYPE_REASSOC_RESP:
1884 case IEEE80211_STYPE_DEAUTH:
1885 case IEEE80211_STYPE_DISASSOC:
1886 case IEEE80211_STYPE_ACTION:
1887 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1888 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1889 return RX_QUEUED;
1890 }
1891
1892 return RX_DROP_MONITOR;
1893 }
1894
1895 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1896 struct sk_buff *skb)
1897 {
1898 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1899 struct ieee80211_rx_status *rx_status;
1900 struct ieee80211_mgmt *mgmt;
1901 struct ieee80211_mgd_work *wk;
1902 enum rx_mgmt_action rma = RX_MGMT_NONE;
1903 u16 fc;
1904
1905 rx_status = (struct ieee80211_rx_status *) skb->cb;
1906 mgmt = (struct ieee80211_mgmt *) skb->data;
1907 fc = le16_to_cpu(mgmt->frame_control);
1908
1909 mutex_lock(&ifmgd->mtx);
1910
1911 if (ifmgd->associated &&
1912 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1913 ETH_ALEN) == 0) {
1914 switch (fc & IEEE80211_FCTL_STYPE) {
1915 case IEEE80211_STYPE_BEACON:
1916 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1917 rx_status);
1918 break;
1919 case IEEE80211_STYPE_PROBE_RESP:
1920 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1921 skb->len, rx_status);
1922 break;
1923 case IEEE80211_STYPE_DEAUTH:
1924 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1925 mgmt, skb->len);
1926 break;
1927 case IEEE80211_STYPE_DISASSOC:
1928 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1929 break;
1930 case IEEE80211_STYPE_ACTION:
1931 /* XXX: differentiate, can only happen for CSA now! */
1932 ieee80211_sta_process_chanswitch(sdata,
1933 &mgmt->u.action.u.chan_switch.sw_elem,
1934 ifmgd->associated);
1935 break;
1936 }
1937 mutex_unlock(&ifmgd->mtx);
1938
1939 switch (rma) {
1940 case RX_MGMT_NONE:
1941 /* no action */
1942 break;
1943 case RX_MGMT_CFG80211_DEAUTH:
1944 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len,
1945 NULL);
1946 break;
1947 case RX_MGMT_CFG80211_DISASSOC:
1948 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len,
1949 NULL);
1950 break;
1951 default:
1952 WARN(1, "unexpected: %d", rma);
1953 }
1954 goto out;
1955 }
1956
1957 list_for_each_entry(wk, &ifmgd->work_list, list) {
1958 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1959 continue;
1960
1961 switch (fc & IEEE80211_FCTL_STYPE) {
1962 case IEEE80211_STYPE_PROBE_RESP:
1963 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1964 rx_status);
1965 break;
1966 case IEEE80211_STYPE_AUTH:
1967 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1968 break;
1969 case IEEE80211_STYPE_ASSOC_RESP:
1970 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1971 skb->len, false);
1972 break;
1973 case IEEE80211_STYPE_REASSOC_RESP:
1974 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1975 skb->len, true);
1976 break;
1977 case IEEE80211_STYPE_DEAUTH:
1978 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
1979 skb->len);
1980 break;
1981 }
1982 /*
1983 * We've processed this frame for that work, so it can't
1984 * belong to another work struct.
1985 * NB: this is also required for correctness because the
1986 * called functions can free 'wk', and for 'rma'!
1987 */
1988 break;
1989 }
1990
1991 mutex_unlock(&ifmgd->mtx);
1992
1993 switch (rma) {
1994 case RX_MGMT_NONE:
1995 /* no action */
1996 break;
1997 case RX_MGMT_CFG80211_AUTH:
1998 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
1999 break;
2000 case RX_MGMT_CFG80211_ASSOC:
2001 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
2002 break;
2003 default:
2004 WARN(1, "unexpected: %d", rma);
2005 }
2006
2007 out:
2008 kfree_skb(skb);
2009 }
2010
2011 static void ieee80211_sta_timer(unsigned long data)
2012 {
2013 struct ieee80211_sub_if_data *sdata =
2014 (struct ieee80211_sub_if_data *) data;
2015 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2016 struct ieee80211_local *local = sdata->local;
2017
2018 if (local->quiescing) {
2019 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2020 return;
2021 }
2022
2023 queue_work(local->hw.workqueue, &ifmgd->work);
2024 }
2025
2026 static void ieee80211_sta_work(struct work_struct *work)
2027 {
2028 struct ieee80211_sub_if_data *sdata =
2029 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2030 struct ieee80211_local *local = sdata->local;
2031 struct ieee80211_if_managed *ifmgd;
2032 struct sk_buff *skb;
2033 struct ieee80211_mgd_work *wk, *tmp;
2034 LIST_HEAD(free_work);
2035 enum rx_mgmt_action rma;
2036 bool anybusy = false;
2037
2038 if (!netif_running(sdata->dev))
2039 return;
2040
2041 if (local->scanning)
2042 return;
2043
2044 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2045 return;
2046
2047 /*
2048 * Nothing should have been stuffed into the workqueue during
2049 * the suspend->resume cycle. If this WARN is seen then there
2050 * is a bug with either the driver suspend or something in
2051 * mac80211 stuffing into the workqueue which we haven't yet
2052 * cleared during mac80211's suspend cycle.
2053 */
2054 if (WARN_ON(local->suspended))
2055 return;
2056
2057 ifmgd = &sdata->u.mgd;
2058
2059 /* first process frames to avoid timing out while a frame is pending */
2060 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2061 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2062
2063 /* then process the rest of the work */
2064 mutex_lock(&ifmgd->mtx);
2065
2066 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2067 IEEE80211_STA_CONNECTION_POLL) &&
2068 ifmgd->associated) {
2069 if (time_is_after_jiffies(ifmgd->probe_timeout))
2070 run_again(ifmgd, ifmgd->probe_timeout);
2071 else {
2072 u8 bssid[ETH_ALEN];
2073 /*
2074 * We actually lost the connection ... or did we?
2075 * Let's make sure!
2076 */
2077 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2078 IEEE80211_STA_BEACON_POLL);
2079 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
2080 printk(KERN_DEBUG "No probe response from AP %pM"
2081 " after %dms, disconnecting.\n",
2082 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
2083 ieee80211_set_disassoc(sdata);
2084 mutex_unlock(&ifmgd->mtx);
2085 /*
2086 * must be outside lock due to cfg80211,
2087 * but that's not a problem.
2088 */
2089 ieee80211_send_deauth_disassoc(sdata, bssid,
2090 IEEE80211_STYPE_DEAUTH,
2091 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2092 NULL);
2093 mutex_lock(&ifmgd->mtx);
2094 }
2095 }
2096
2097 list_for_each_entry(wk, &ifmgd->work_list, list) {
2098 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
2099 anybusy = true;
2100 break;
2101 }
2102 }
2103
2104 ieee80211_recalc_idle(local);
2105
2106 if (!anybusy) {
2107 mutex_unlock(&ifmgd->mtx);
2108
2109 if (test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
2110 queue_delayed_work(local->hw.workqueue,
2111 &local->scan_work,
2112 round_jiffies_relative(0));
2113 return;
2114 }
2115
2116 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
2117 if (time_is_after_jiffies(wk->timeout)) {
2118 /*
2119 * This work item isn't supposed to be worked on
2120 * right now, but take care to adjust the timer
2121 * properly.
2122 */
2123 run_again(ifmgd, wk->timeout);
2124 continue;
2125 }
2126
2127 switch (wk->state) {
2128 default:
2129 WARN_ON(1);
2130 /* fall through */
2131 case IEEE80211_MGD_STATE_IDLE:
2132 /* nothing */
2133 rma = RX_MGMT_NONE;
2134 break;
2135 case IEEE80211_MGD_STATE_PROBE:
2136 rma = ieee80211_direct_probe(sdata, wk);
2137 break;
2138 case IEEE80211_MGD_STATE_AUTH:
2139 rma = ieee80211_authenticate(sdata, wk);
2140 break;
2141 case IEEE80211_MGD_STATE_ASSOC:
2142 rma = ieee80211_associate(sdata, wk);
2143 break;
2144 }
2145
2146 switch (rma) {
2147 case RX_MGMT_NONE:
2148 /* no action required */
2149 break;
2150 case RX_MGMT_CFG80211_AUTH_TO:
2151 case RX_MGMT_CFG80211_ASSOC_TO:
2152 list_del(&wk->list);
2153 list_add(&wk->list, &free_work);
2154 wk->tries = rma; /* small abuse but only local */
2155 break;
2156 default:
2157 WARN(1, "unexpected: %d", rma);
2158 }
2159 }
2160
2161 mutex_unlock(&ifmgd->mtx);
2162
2163 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2164 switch (wk->tries) {
2165 case RX_MGMT_CFG80211_AUTH_TO:
2166 cfg80211_send_auth_timeout(sdata->dev,
2167 wk->bss->cbss.bssid);
2168 break;
2169 case RX_MGMT_CFG80211_ASSOC_TO:
2170 cfg80211_send_assoc_timeout(sdata->dev,
2171 wk->bss->cbss.bssid);
2172 break;
2173 default:
2174 WARN(1, "unexpected: %d", wk->tries);
2175 }
2176
2177 list_del(&wk->list);
2178 kfree(wk);
2179 }
2180
2181 ieee80211_recalc_idle(local);
2182 }
2183
2184 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2185 {
2186 struct ieee80211_sub_if_data *sdata =
2187 (struct ieee80211_sub_if_data *) data;
2188 struct ieee80211_local *local = sdata->local;
2189
2190 if (local->quiescing)
2191 return;
2192
2193 queue_work(sdata->local->hw.workqueue,
2194 &sdata->u.mgd.beacon_loss_work);
2195 }
2196
2197 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2198 {
2199 struct ieee80211_sub_if_data *sdata =
2200 (struct ieee80211_sub_if_data *) data;
2201 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2202 struct ieee80211_local *local = sdata->local;
2203
2204 if (local->quiescing)
2205 return;
2206
2207 queue_work(local->hw.workqueue, &ifmgd->monitor_work);
2208 }
2209
2210 static void ieee80211_sta_monitor_work(struct work_struct *work)
2211 {
2212 struct ieee80211_sub_if_data *sdata =
2213 container_of(work, struct ieee80211_sub_if_data,
2214 u.mgd.monitor_work);
2215
2216 if (sdata->local->scanning)
2217 return;
2218
2219 ieee80211_mgd_probe_ap(sdata, false);
2220 }
2221
2222 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2223 {
2224 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2225 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2226 IEEE80211_STA_CONNECTION_POLL);
2227
2228 /* let's probe the connection once */
2229 queue_work(sdata->local->hw.workqueue,
2230 &sdata->u.mgd.monitor_work);
2231 /* and do all the other regular work too */
2232 queue_work(sdata->local->hw.workqueue,
2233 &sdata->u.mgd.work);
2234 }
2235 }
2236
2237 #ifdef CONFIG_PM
2238 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2239 {
2240 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2241
2242 /*
2243 * we need to use atomic bitops for the running bits
2244 * only because both timers might fire at the same
2245 * time -- the code here is properly synchronised.
2246 */
2247
2248 cancel_work_sync(&ifmgd->work);
2249 cancel_work_sync(&ifmgd->beacon_loss_work);
2250 if (del_timer_sync(&ifmgd->timer))
2251 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2252
2253 cancel_work_sync(&ifmgd->chswitch_work);
2254 if (del_timer_sync(&ifmgd->chswitch_timer))
2255 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2256
2257 cancel_work_sync(&ifmgd->monitor_work);
2258 /* these will just be re-established on connection */
2259 del_timer_sync(&ifmgd->conn_mon_timer);
2260 del_timer_sync(&ifmgd->bcn_mon_timer);
2261 }
2262
2263 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2264 {
2265 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2266
2267 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2268 add_timer(&ifmgd->timer);
2269 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2270 add_timer(&ifmgd->chswitch_timer);
2271 }
2272 #endif
2273
2274 /* interface setup */
2275 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2276 {
2277 struct ieee80211_if_managed *ifmgd;
2278
2279 ifmgd = &sdata->u.mgd;
2280 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2281 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2282 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2283 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2284 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2285 (unsigned long) sdata);
2286 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2287 (unsigned long) sdata);
2288 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2289 (unsigned long) sdata);
2290 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2291 (unsigned long) sdata);
2292 skb_queue_head_init(&ifmgd->skb_queue);
2293
2294 INIT_LIST_HEAD(&ifmgd->work_list);
2295
2296 ifmgd->capab = WLAN_CAPABILITY_ESS;
2297 ifmgd->flags = 0;
2298 if (sdata->local->hw.queues >= 4)
2299 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2300
2301 mutex_init(&ifmgd->mtx);
2302 }
2303
2304 /* scan finished notification */
2305 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2306 {
2307 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2308
2309 /* Restart STA timers */
2310 rcu_read_lock();
2311 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2312 ieee80211_restart_sta_timer(sdata);
2313 rcu_read_unlock();
2314 }
2315
2316 int ieee80211_max_network_latency(struct notifier_block *nb,
2317 unsigned long data, void *dummy)
2318 {
2319 s32 latency_usec = (s32) data;
2320 struct ieee80211_local *local =
2321 container_of(nb, struct ieee80211_local,
2322 network_latency_notifier);
2323
2324 mutex_lock(&local->iflist_mtx);
2325 ieee80211_recalc_ps(local, latency_usec);
2326 mutex_unlock(&local->iflist_mtx);
2327
2328 return 0;
2329 }
2330
2331 /* config hooks */
2332 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2333 struct cfg80211_auth_request *req)
2334 {
2335 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2336 const u8 *ssid;
2337 struct ieee80211_mgd_work *wk;
2338 u16 auth_alg;
2339
2340 switch (req->auth_type) {
2341 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2342 auth_alg = WLAN_AUTH_OPEN;
2343 break;
2344 case NL80211_AUTHTYPE_SHARED_KEY:
2345 auth_alg = WLAN_AUTH_SHARED_KEY;
2346 break;
2347 case NL80211_AUTHTYPE_FT:
2348 auth_alg = WLAN_AUTH_FT;
2349 break;
2350 case NL80211_AUTHTYPE_NETWORK_EAP:
2351 auth_alg = WLAN_AUTH_LEAP;
2352 break;
2353 default:
2354 return -EOPNOTSUPP;
2355 }
2356
2357 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2358 if (!wk)
2359 return -ENOMEM;
2360
2361 wk->bss = (void *)req->bss;
2362
2363 if (req->ie && req->ie_len) {
2364 memcpy(wk->ie, req->ie, req->ie_len);
2365 wk->ie_len = req->ie_len;
2366 }
2367
2368 if (req->key && req->key_len) {
2369 wk->key_len = req->key_len;
2370 wk->key_idx = req->key_idx;
2371 memcpy(wk->key, req->key, req->key_len);
2372 }
2373
2374 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2375 memcpy(wk->ssid, ssid + 2, ssid[1]);
2376 wk->ssid_len = ssid[1];
2377
2378 wk->state = IEEE80211_MGD_STATE_PROBE;
2379 wk->auth_alg = auth_alg;
2380
2381 /*
2382 * XXX: if still associated need to tell AP that we're going
2383 * to sleep and then change channel etc.
2384 */
2385 sdata->local->oper_channel = req->bss->channel;
2386 ieee80211_hw_config(sdata->local, 0);
2387
2388 mutex_lock(&ifmgd->mtx);
2389 list_add(&wk->list, &sdata->u.mgd.work_list);
2390 mutex_unlock(&ifmgd->mtx);
2391
2392 queue_work(sdata->local->hw.workqueue, &sdata->u.mgd.work);
2393 return 0;
2394 }
2395
2396 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2397 struct cfg80211_assoc_request *req)
2398 {
2399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2400 struct ieee80211_mgd_work *wk, *found = NULL;
2401 int i, err;
2402
2403 mutex_lock(&ifmgd->mtx);
2404
2405 list_for_each_entry(wk, &ifmgd->work_list, list) {
2406 if (&wk->bss->cbss == req->bss &&
2407 wk->state == IEEE80211_MGD_STATE_IDLE) {
2408 found = wk;
2409 break;
2410 }
2411 }
2412
2413 if (!found) {
2414 err = -ENOLINK;
2415 goto out;
2416 }
2417
2418 list_del(&found->list);
2419
2420 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2421 if (!wk) {
2422 list_add(&found->list, &ifmgd->work_list);
2423 err = -ENOMEM;
2424 goto out;
2425 }
2426
2427 list_add(&wk->list, &ifmgd->work_list);
2428
2429 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2430
2431 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2432 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2433 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2434 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2435 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2436
2437 sdata->local->oper_channel = req->bss->channel;
2438 ieee80211_hw_config(sdata->local, 0);
2439
2440 if (req->ie && req->ie_len) {
2441 memcpy(wk->ie, req->ie, req->ie_len);
2442 wk->ie_len = req->ie_len;
2443 } else
2444 wk->ie_len = 0;
2445
2446 if (req->prev_bssid)
2447 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2448
2449 wk->state = IEEE80211_MGD_STATE_ASSOC;
2450 wk->tries = 0;
2451
2452 if (req->use_mfp) {
2453 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2454 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2455 } else {
2456 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2457 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2458 }
2459
2460 if (req->crypto.control_port)
2461 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2462 else
2463 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2464
2465 queue_work(sdata->local->hw.workqueue, &sdata->u.mgd.work);
2466
2467 err = 0;
2468
2469 out:
2470 mutex_unlock(&ifmgd->mtx);
2471 return err;
2472 }
2473
2474 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2475 struct cfg80211_deauth_request *req,
2476 void *cookie)
2477 {
2478 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2479 struct ieee80211_mgd_work *wk;
2480 const u8 *bssid = NULL;
2481
2482 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2483 sdata->dev->name, req->reason_code);
2484
2485 mutex_lock(&ifmgd->mtx);
2486
2487 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2488 bssid = req->bss->bssid;
2489 ieee80211_set_disassoc(sdata);
2490 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2491 if (&wk->bss->cbss == req->bss) {
2492 bssid = req->bss->bssid;
2493 list_del(&wk->list);
2494 kfree(wk);
2495 break;
2496 }
2497 }
2498
2499 /* cfg80211 should catch this... */
2500 if (WARN_ON(!bssid)) {
2501 mutex_unlock(&ifmgd->mtx);
2502 return -ENOLINK;
2503 }
2504
2505 mutex_unlock(&ifmgd->mtx);
2506
2507 ieee80211_send_deauth_disassoc(sdata, bssid,
2508 IEEE80211_STYPE_DEAUTH, req->reason_code,
2509 cookie);
2510
2511 return 0;
2512 }
2513
2514 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2515 struct cfg80211_disassoc_request *req,
2516 void *cookie)
2517 {
2518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2519
2520 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2521 sdata->dev->name, req->reason_code);
2522
2523 mutex_lock(&ifmgd->mtx);
2524
2525 /* cfg80211 should catch that */
2526 if (WARN_ON(&ifmgd->associated->cbss != req->bss)) {
2527 mutex_unlock(&ifmgd->mtx);
2528 return -ENOLINK;
2529 }
2530
2531 ieee80211_set_disassoc(sdata);
2532
2533 mutex_unlock(&ifmgd->mtx);
2534
2535 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2536 IEEE80211_STYPE_DISASSOC, req->reason_code,
2537 cookie);
2538 return 0;
2539 }
WandBoard kernel