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mac80211: disable moving between PS modes during scan
[linux-2.6/btrfs-unstable.git] / net / mac80211 / mlme.c
blob898e9b02aaace1080566dd9f16b82887287fc683
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_ASSOC_SCANS_MAX_TRIES 2
31 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32 #define IEEE80211_AUTH_MAX_TRIES 3
33 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34 #define IEEE80211_ASSOC_MAX_TRIES 3
35 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
36 #define IEEE80211_PROBE_WAIT (HZ / 5)
37 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
38 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
39
40 #define TMR_RUNNING_TIMER 0
41 #define TMR_RUNNING_CHANSW 1
42
43 /* utils */
44 static int ecw2cw(int ecw)
45 {
46 return (1 << ecw) - 1;
47 }
48
49 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
50 {
51 u8 *end, *pos;
52
53 pos = bss->cbss.information_elements;
54 if (pos == NULL)
55 return NULL;
56 end = pos + bss->cbss.len_information_elements;
57
58 while (pos + 1 < end) {
59 if (pos + 2 + pos[1] > end)
60 break;
61 if (pos[0] == ie)
62 return pos;
63 pos += 2 + pos[1];
64 }
65
66 return NULL;
67 }
68
69 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
70 struct ieee80211_supported_band *sband,
71 u32 *rates)
72 {
73 int i, j, count;
74 *rates = 0;
75 count = 0;
76 for (i = 0; i < bss->supp_rates_len; i++) {
77 int rate = (bss->supp_rates[i] & 0x7F) * 5;
78
79 for (j = 0; j < sband->n_bitrates; j++)
80 if (sband->bitrates[j].bitrate == rate) {
81 *rates |= BIT(j);
82 count++;
83 break;
84 }
85 }
86
87 return count;
88 }
89
90 /*
91 * ieee80211_enable_ht should be called only after the operating band
92 * has been determined as ht configuration depends on the hw's
93 * HT abilities for a specific band.
94 */
95 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
96 struct ieee80211_ht_info *hti,
97 u16 ap_ht_cap_flags)
98 {
99 struct ieee80211_local *local = sdata->local;
100 struct ieee80211_supported_band *sband;
101 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
102 struct sta_info *sta;
103 u32 changed = 0;
104 u16 ht_opmode;
105 bool enable_ht = true, ht_changed;
106 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
107
108 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
109
110 /* HT is not supported */
111 if (!sband->ht_cap.ht_supported)
112 enable_ht = false;
113
114 /* check that channel matches the right operating channel */
115 if (local->hw.conf.channel->center_freq !=
116 ieee80211_channel_to_frequency(hti->control_chan))
117 enable_ht = false;
118
119 if (enable_ht) {
120 channel_type = NL80211_CHAN_HT20;
121
122 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
123 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
124 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
125 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
126 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
127 if (!(local->hw.conf.channel->flags &
128 IEEE80211_CHAN_NO_HT40PLUS))
129 channel_type = NL80211_CHAN_HT40PLUS;
130 break;
131 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
132 if (!(local->hw.conf.channel->flags &
133 IEEE80211_CHAN_NO_HT40MINUS))
134 channel_type = NL80211_CHAN_HT40MINUS;
135 break;
136 }
137 }
138 }
139
140 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
141 channel_type != local->hw.conf.channel_type;
142
143 local->oper_channel_type = channel_type;
144
145 if (ht_changed) {
146 /* channel_type change automatically detected */
147 ieee80211_hw_config(local, 0);
148
149 rcu_read_lock();
150
151 sta = sta_info_get(local, ifmgd->bssid);
152 if (sta)
153 rate_control_rate_update(local, sband, sta,
154 IEEE80211_RC_HT_CHANGED);
155
156 rcu_read_unlock();
157 }
158
159 /* disable HT */
160 if (!enable_ht)
161 return 0;
162
163 ht_opmode = le16_to_cpu(hti->operation_mode);
164
165 /* if bss configuration changed store the new one */
166 if (!sdata->ht_opmode_valid ||
167 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
168 changed |= BSS_CHANGED_HT;
169 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
170 sdata->ht_opmode_valid = true;
171 }
172
173 return changed;
174 }
175
176 /* frame sending functions */
177
178 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
179 {
180 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
181 struct ieee80211_local *local = sdata->local;
182 struct sk_buff *skb;
183 struct ieee80211_mgmt *mgmt;
184 u8 *pos, *ies, *ht_ie;
185 int i, len, count, rates_len, supp_rates_len;
186 u16 capab;
187 struct ieee80211_bss *bss;
188 int wmm = 0;
189 struct ieee80211_supported_band *sband;
190 u32 rates = 0;
191
192 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
193 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
194 ifmgd->ssid_len);
195 if (!skb) {
196 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
197 "frame\n", sdata->dev->name);
198 return;
199 }
200 skb_reserve(skb, local->hw.extra_tx_headroom);
201
202 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
203
204 capab = ifmgd->capab;
205
206 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
207 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
208 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
209 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
210 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
211 }
212
213 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
214 local->hw.conf.channel->center_freq,
215 ifmgd->ssid, ifmgd->ssid_len);
216 if (bss) {
217 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
218 capab |= WLAN_CAPABILITY_PRIVACY;
219 if (bss->wmm_used)
220 wmm = 1;
221
222 /* get all rates supported by the device and the AP as
223 * some APs don't like getting a superset of their rates
224 * in the association request (e.g. D-Link DAP 1353 in
225 * b-only mode) */
226 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
227
228 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
229 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
230 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
231
232 ieee80211_rx_bss_put(local, bss);
233 } else {
234 rates = ~0;
235 rates_len = sband->n_bitrates;
236 }
237
238 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
239 memset(mgmt, 0, 24);
240 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
241 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
242 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
243
244 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
245 skb_put(skb, 10);
246 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
247 IEEE80211_STYPE_REASSOC_REQ);
248 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
249 mgmt->u.reassoc_req.listen_interval =
250 cpu_to_le16(local->hw.conf.listen_interval);
251 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
252 ETH_ALEN);
253 } else {
254 skb_put(skb, 4);
255 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
256 IEEE80211_STYPE_ASSOC_REQ);
257 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
258 mgmt->u.assoc_req.listen_interval =
259 cpu_to_le16(local->hw.conf.listen_interval);
260 }
261
262 /* SSID */
263 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
264 *pos++ = WLAN_EID_SSID;
265 *pos++ = ifmgd->ssid_len;
266 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
267
268 /* add all rates which were marked to be used above */
269 supp_rates_len = rates_len;
270 if (supp_rates_len > 8)
271 supp_rates_len = 8;
272
273 len = sband->n_bitrates;
274 pos = skb_put(skb, supp_rates_len + 2);
275 *pos++ = WLAN_EID_SUPP_RATES;
276 *pos++ = supp_rates_len;
277
278 count = 0;
279 for (i = 0; i < sband->n_bitrates; i++) {
280 if (BIT(i) & rates) {
281 int rate = sband->bitrates[i].bitrate;
282 *pos++ = (u8) (rate / 5);
283 if (++count == 8)
284 break;
285 }
286 }
287
288 if (rates_len > count) {
289 pos = skb_put(skb, rates_len - count + 2);
290 *pos++ = WLAN_EID_EXT_SUPP_RATES;
291 *pos++ = rates_len - count;
292
293 for (i++; i < sband->n_bitrates; i++) {
294 if (BIT(i) & rates) {
295 int rate = sband->bitrates[i].bitrate;
296 *pos++ = (u8) (rate / 5);
297 }
298 }
299 }
300
301 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
302 /* 1. power capabilities */
303 pos = skb_put(skb, 4);
304 *pos++ = WLAN_EID_PWR_CAPABILITY;
305 *pos++ = 2;
306 *pos++ = 0; /* min tx power */
307 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
308
309 /* 2. supported channels */
310 /* TODO: get this in reg domain format */
311 pos = skb_put(skb, 2 * sband->n_channels + 2);
312 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
313 *pos++ = 2 * sband->n_channels;
314 for (i = 0; i < sband->n_channels; i++) {
315 *pos++ = ieee80211_frequency_to_channel(
316 sband->channels[i].center_freq);
317 *pos++ = 1; /* one channel in the subband*/
318 }
319 }
320
321 if (ifmgd->extra_ie) {
322 pos = skb_put(skb, ifmgd->extra_ie_len);
323 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
324 }
325
326 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
327 pos = skb_put(skb, 9);
328 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
329 *pos++ = 7; /* len */
330 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
331 *pos++ = 0x50;
332 *pos++ = 0xf2;
333 *pos++ = 2; /* WME */
334 *pos++ = 0; /* WME info */
335 *pos++ = 1; /* WME ver */
336 *pos++ = 0;
337 }
338
339 /* wmm support is a must to HT */
340 /*
341 * IEEE802.11n does not allow TKIP/WEP as pairwise
342 * ciphers in HT mode. We still associate in non-ht
343 * mode (11a/b/g) if any one of these ciphers is
344 * configured as pairwise.
345 */
346 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
347 sband->ht_cap.ht_supported &&
348 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
349 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
350 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
351 struct ieee80211_ht_info *ht_info =
352 (struct ieee80211_ht_info *)(ht_ie + 2);
353 u16 cap = sband->ht_cap.cap;
354 __le16 tmp;
355 u32 flags = local->hw.conf.channel->flags;
356
357 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
358 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
359 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
360 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
361 cap &= ~IEEE80211_HT_CAP_SGI_40;
362 }
363 break;
364 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
365 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
366 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
367 cap &= ~IEEE80211_HT_CAP_SGI_40;
368 }
369 break;
370 }
371
372 tmp = cpu_to_le16(cap);
373 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
374 *pos++ = WLAN_EID_HT_CAPABILITY;
375 *pos++ = sizeof(struct ieee80211_ht_cap);
376 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
377 memcpy(pos, &tmp, sizeof(u16));
378 pos += sizeof(u16);
379 /* TODO: needs a define here for << 2 */
380 *pos++ = sband->ht_cap.ampdu_factor |
381 (sband->ht_cap.ampdu_density << 2);
382 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
383 }
384
385 kfree(ifmgd->assocreq_ies);
386 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
387 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
388 if (ifmgd->assocreq_ies)
389 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
390
391 ieee80211_tx_skb(sdata, skb, 0);
392 }
393
394
395 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
396 u16 stype, u16 reason)
397 {
398 struct ieee80211_local *local = sdata->local;
399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
400 struct sk_buff *skb;
401 struct ieee80211_mgmt *mgmt;
402
403 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
404 if (!skb) {
405 printk(KERN_DEBUG "%s: failed to allocate buffer for "
406 "deauth/disassoc frame\n", sdata->dev->name);
407 return;
408 }
409 skb_reserve(skb, local->hw.extra_tx_headroom);
410
411 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
412 memset(mgmt, 0, 24);
413 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
414 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
415 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
416 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
417 skb_put(skb, 2);
418 /* u.deauth.reason_code == u.disassoc.reason_code */
419 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
420
421 if (stype == IEEE80211_STYPE_DEAUTH)
422 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len);
423 else
424 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len);
425 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
426 }
427
428 void ieee80211_send_pspoll(struct ieee80211_local *local,
429 struct ieee80211_sub_if_data *sdata)
430 {
431 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
432 struct ieee80211_pspoll *pspoll;
433 struct sk_buff *skb;
434 u16 fc;
435
436 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
437 if (!skb) {
438 printk(KERN_DEBUG "%s: failed to allocate buffer for "
439 "pspoll frame\n", sdata->dev->name);
440 return;
441 }
442 skb_reserve(skb, local->hw.extra_tx_headroom);
443
444 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
445 memset(pspoll, 0, sizeof(*pspoll));
446 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
447 pspoll->frame_control = cpu_to_le16(fc);
448 pspoll->aid = cpu_to_le16(ifmgd->aid);
449
450 /* aid in PS-Poll has its two MSBs each set to 1 */
451 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
452
453 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
454 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
455
456 ieee80211_tx_skb(sdata, skb, 0);
457 }
458
459 void ieee80211_send_nullfunc(struct ieee80211_local *local,
460 struct ieee80211_sub_if_data *sdata,
461 int powersave)
462 {
463 struct sk_buff *skb;
464 struct ieee80211_hdr *nullfunc;
465 __le16 fc;
466
467 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
468 return;
469
470 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
471 if (!skb) {
472 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
473 "frame\n", sdata->dev->name);
474 return;
475 }
476 skb_reserve(skb, local->hw.extra_tx_headroom);
477
478 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
479 memset(nullfunc, 0, 24);
480 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
481 IEEE80211_FCTL_TODS);
482 if (powersave)
483 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
484 nullfunc->frame_control = fc;
485 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
486 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
487 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
488
489 ieee80211_tx_skb(sdata, skb, 0);
490 }
491
492 /* spectrum management related things */
493 static void ieee80211_chswitch_work(struct work_struct *work)
494 {
495 struct ieee80211_sub_if_data *sdata =
496 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
497 struct ieee80211_bss *bss;
498 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
499
500 if (!netif_running(sdata->dev))
501 return;
502
503 bss = ieee80211_rx_bss_get(sdata->local, ifmgd->bssid,
504 sdata->local->hw.conf.channel->center_freq,
505 ifmgd->ssid, ifmgd->ssid_len);
506 if (!bss)
507 goto exit;
508
509 sdata->local->oper_channel = sdata->local->csa_channel;
510 /* XXX: shouldn't really modify cfg80211-owned data! */
511 if (!ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL))
512 bss->cbss.channel = sdata->local->oper_channel;
513
514 ieee80211_rx_bss_put(sdata->local, bss);
515 exit:
516 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
517 ieee80211_wake_queues_by_reason(&sdata->local->hw,
518 IEEE80211_QUEUE_STOP_REASON_CSA);
519 }
520
521 static void ieee80211_chswitch_timer(unsigned long data)
522 {
523 struct ieee80211_sub_if_data *sdata =
524 (struct ieee80211_sub_if_data *) data;
525 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
526
527 if (sdata->local->quiescing) {
528 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
529 return;
530 }
531
532 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
533 }
534
535 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
536 struct ieee80211_channel_sw_ie *sw_elem,
537 struct ieee80211_bss *bss)
538 {
539 struct ieee80211_channel *new_ch;
540 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
541 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
542
543 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATED)
544 return;
545
546 if (sdata->local->sw_scanning || sdata->local->hw_scanning)
547 return;
548
549 /* Disregard subsequent beacons if we are already running a timer
550 processing a CSA */
551
552 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
553 return;
554
555 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
556 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
557 return;
558
559 sdata->local->csa_channel = new_ch;
560
561 if (sw_elem->count <= 1) {
562 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
563 } else {
564 ieee80211_stop_queues_by_reason(&sdata->local->hw,
565 IEEE80211_QUEUE_STOP_REASON_CSA);
566 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
567 mod_timer(&ifmgd->chswitch_timer,
568 jiffies +
569 msecs_to_jiffies(sw_elem->count *
570 bss->cbss.beacon_interval));
571 }
572 }
573
574 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
575 u16 capab_info, u8 *pwr_constr_elem,
576 u8 pwr_constr_elem_len)
577 {
578 struct ieee80211_conf *conf = &sdata->local->hw.conf;
579
580 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
581 return;
582
583 /* Power constraint IE length should be 1 octet */
584 if (pwr_constr_elem_len != 1)
585 return;
586
587 if ((*pwr_constr_elem <= conf->channel->max_power) &&
588 (*pwr_constr_elem != sdata->local->power_constr_level)) {
589 sdata->local->power_constr_level = *pwr_constr_elem;
590 ieee80211_hw_config(sdata->local, 0);
591 }
592 }
593
594 /* powersave */
595 static void ieee80211_enable_ps(struct ieee80211_local *local,
596 struct ieee80211_sub_if_data *sdata)
597 {
598 struct ieee80211_conf *conf = &local->hw.conf;
599
600 /*
601 * If we are scanning right now then the parameters will
602 * take effect when scan finishes.
603 */
604 if (local->hw_scanning || local->sw_scanning)
605 return;
606
607 if (conf->dynamic_ps_timeout > 0 &&
608 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
609 mod_timer(&local->dynamic_ps_timer, jiffies +
610 msecs_to_jiffies(conf->dynamic_ps_timeout));
611 } else {
612 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
613 ieee80211_send_nullfunc(local, sdata, 1);
614 conf->flags |= IEEE80211_CONF_PS;
615 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
616 }
617 }
618
619 static void ieee80211_change_ps(struct ieee80211_local *local)
620 {
621 struct ieee80211_conf *conf = &local->hw.conf;
622
623 if (local->ps_sdata) {
624 ieee80211_enable_ps(local, local->ps_sdata);
625 } else if (conf->flags & IEEE80211_CONF_PS) {
626 conf->flags &= ~IEEE80211_CONF_PS;
627 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
628 del_timer_sync(&local->dynamic_ps_timer);
629 cancel_work_sync(&local->dynamic_ps_enable_work);
630 }
631 }
632
633 /* need to hold RTNL or interface lock */
634 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
635 {
636 struct ieee80211_sub_if_data *sdata, *found = NULL;
637 int count = 0;
638
639 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
640 local->ps_sdata = NULL;
641 return;
642 }
643
644 list_for_each_entry(sdata, &local->interfaces, list) {
645 if (!netif_running(sdata->dev))
646 continue;
647 if (sdata->vif.type != NL80211_IFTYPE_STATION)
648 continue;
649 found = sdata;
650 count++;
651 }
652
653 if (count == 1 && found->u.mgd.powersave &&
654 (found->u.mgd.flags & IEEE80211_STA_ASSOCIATED)) {
655 s32 beaconint_us;
656
657 if (latency < 0)
658 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
659
660 beaconint_us = ieee80211_tu_to_usec(
661 found->vif.bss_conf.beacon_int);
662
663 if (beaconint_us > latency) {
664 local->ps_sdata = NULL;
665 } else {
666 u8 dtimper = found->vif.bss_conf.dtim_period;
667 int maxslp = 1;
668
669 if (dtimper > 1)
670 maxslp = min_t(int, dtimper,
671 latency / beaconint_us);
672
673 local->hw.conf.max_sleep_period = maxslp;
674 local->ps_sdata = found;
675 }
676 } else {
677 local->ps_sdata = NULL;
678 }
679
680 ieee80211_change_ps(local);
681 }
682
683 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
684 {
685 struct ieee80211_local *local =
686 container_of(work, struct ieee80211_local,
687 dynamic_ps_disable_work);
688
689 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
690 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
691 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
692 }
693
694 ieee80211_wake_queues_by_reason(&local->hw,
695 IEEE80211_QUEUE_STOP_REASON_PS);
696 }
697
698 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
699 {
700 struct ieee80211_local *local =
701 container_of(work, struct ieee80211_local,
702 dynamic_ps_enable_work);
703 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
704
705 /* can only happen when PS was just disabled anyway */
706 if (!sdata)
707 return;
708
709 if (local->hw.conf.flags & IEEE80211_CONF_PS)
710 return;
711
712 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
713 ieee80211_send_nullfunc(local, sdata, 1);
714
715 local->hw.conf.flags |= IEEE80211_CONF_PS;
716 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
717 }
718
719 void ieee80211_dynamic_ps_timer(unsigned long data)
720 {
721 struct ieee80211_local *local = (void *) data;
722
723 if (local->quiescing)
724 return;
725
726 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
727 }
728
729 /* MLME */
730 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
731 struct ieee80211_if_managed *ifmgd,
732 u8 *wmm_param, size_t wmm_param_len)
733 {
734 struct ieee80211_tx_queue_params params;
735 size_t left;
736 int count;
737 u8 *pos;
738
739 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
740 return;
741
742 if (!wmm_param)
743 return;
744
745 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
746 return;
747 count = wmm_param[6] & 0x0f;
748 if (count == ifmgd->wmm_last_param_set)
749 return;
750 ifmgd->wmm_last_param_set = count;
751
752 pos = wmm_param + 8;
753 left = wmm_param_len - 8;
754
755 memset(&params, 0, sizeof(params));
756
757 local->wmm_acm = 0;
758 for (; left >= 4; left -= 4, pos += 4) {
759 int aci = (pos[0] >> 5) & 0x03;
760 int acm = (pos[0] >> 4) & 0x01;
761 int queue;
762
763 switch (aci) {
764 case 1: /* AC_BK */
765 queue = 3;
766 if (acm)
767 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
768 break;
769 case 2: /* AC_VI */
770 queue = 1;
771 if (acm)
772 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
773 break;
774 case 3: /* AC_VO */
775 queue = 0;
776 if (acm)
777 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
778 break;
779 case 0: /* AC_BE */
780 default:
781 queue = 2;
782 if (acm)
783 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
784 break;
785 }
786
787 params.aifs = pos[0] & 0x0f;
788 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
789 params.cw_min = ecw2cw(pos[1] & 0x0f);
790 params.txop = get_unaligned_le16(pos + 2);
791 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
792 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
793 "cWmin=%d cWmax=%d txop=%d\n",
794 wiphy_name(local->hw.wiphy), queue, aci, acm,
795 params.aifs, params.cw_min, params.cw_max, params.txop);
796 #endif
797 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
798 printk(KERN_DEBUG "%s: failed to set TX queue "
799 "parameters for queue %d\n",
800 wiphy_name(local->hw.wiphy), queue);
801 }
802 }
803
804 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
805 u16 capab, bool erp_valid, u8 erp)
806 {
807 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
808 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
809 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
810 #endif
811 u32 changed = 0;
812 bool use_protection;
813 bool use_short_preamble;
814 bool use_short_slot;
815
816 if (erp_valid) {
817 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
818 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
819 } else {
820 use_protection = false;
821 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
822 }
823
824 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
825
826 if (use_protection != bss_conf->use_cts_prot) {
827 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
828 if (net_ratelimit()) {
829 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
830 sdata->dev->name,
831 use_protection ? "enabled" : "disabled",
832 ifmgd->bssid);
833 }
834 #endif
835 bss_conf->use_cts_prot = use_protection;
836 changed |= BSS_CHANGED_ERP_CTS_PROT;
837 }
838
839 if (use_short_preamble != bss_conf->use_short_preamble) {
840 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
841 if (net_ratelimit()) {
842 printk(KERN_DEBUG "%s: switched to %s barker preamble"
843 " (BSSID=%pM)\n",
844 sdata->dev->name,
845 use_short_preamble ? "short" : "long",
846 ifmgd->bssid);
847 }
848 #endif
849 bss_conf->use_short_preamble = use_short_preamble;
850 changed |= BSS_CHANGED_ERP_PREAMBLE;
851 }
852
853 if (use_short_slot != bss_conf->use_short_slot) {
854 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
855 if (net_ratelimit()) {
856 printk(KERN_DEBUG "%s: switched to %s slot time"
857 " (BSSID=%pM)\n",
858 sdata->dev->name,
859 use_short_slot ? "short" : "long",
860 ifmgd->bssid);
861 }
862 #endif
863 bss_conf->use_short_slot = use_short_slot;
864 changed |= BSS_CHANGED_ERP_SLOT;
865 }
866
867 return changed;
868 }
869
870 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
871 {
872 union iwreq_data wrqu;
873
874 memset(&wrqu, 0, sizeof(wrqu));
875 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
876 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
877 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
878 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
879 }
880
881 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
882 {
883 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
884 char *buf;
885 size_t len;
886 int i;
887 union iwreq_data wrqu;
888
889 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
890 return;
891
892 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
893 ifmgd->assocresp_ies_len), GFP_KERNEL);
894 if (!buf)
895 return;
896
897 len = sprintf(buf, "ASSOCINFO(");
898 if (ifmgd->assocreq_ies) {
899 len += sprintf(buf + len, "ReqIEs=");
900 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
901 len += sprintf(buf + len, "%02x",
902 ifmgd->assocreq_ies[i]);
903 }
904 }
905 if (ifmgd->assocresp_ies) {
906 if (ifmgd->assocreq_ies)
907 len += sprintf(buf + len, " ");
908 len += sprintf(buf + len, "RespIEs=");
909 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
910 len += sprintf(buf + len, "%02x",
911 ifmgd->assocresp_ies[i]);
912 }
913 }
914 len += sprintf(buf + len, ")");
915
916 if (len > IW_CUSTOM_MAX) {
917 len = sprintf(buf, "ASSOCRESPIE=");
918 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
919 len += sprintf(buf + len, "%02x",
920 ifmgd->assocresp_ies[i]);
921 }
922 }
923
924 if (len <= IW_CUSTOM_MAX) {
925 memset(&wrqu, 0, sizeof(wrqu));
926 wrqu.data.length = len;
927 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
928 }
929
930 kfree(buf);
931 }
932
933
934 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
935 u32 bss_info_changed)
936 {
937 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
938 struct ieee80211_local *local = sdata->local;
939 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
940
941 struct ieee80211_bss *bss;
942
943 bss_info_changed |= BSS_CHANGED_ASSOC;
944 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
945
946 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
947 conf->channel->center_freq,
948 ifmgd->ssid, ifmgd->ssid_len);
949 if (bss) {
950 /* set timing information */
951 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
952 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
953 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
954
955 bss_info_changed |= BSS_CHANGED_BEACON_INT;
956 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
957 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
958
959 cfg80211_hold_bss(&bss->cbss);
960
961 ieee80211_rx_bss_put(local, bss);
962 }
963
964 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
965 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
966 ieee80211_sta_send_associnfo(sdata);
967
968 ifmgd->last_probe = jiffies;
969 ieee80211_led_assoc(local, 1);
970
971 sdata->vif.bss_conf.assoc = 1;
972 /*
973 * For now just always ask the driver to update the basic rateset
974 * when we have associated, we aren't checking whether it actually
975 * changed or not.
976 */
977 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
978
979 /* And the BSSID changed - we're associated now */
980 bss_info_changed |= BSS_CHANGED_BSSID;
981
982 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
983
984 /* will be same as sdata */
985 if (local->ps_sdata) {
986 mutex_lock(&local->iflist_mtx);
987 ieee80211_recalc_ps(local, -1);
988 mutex_unlock(&local->iflist_mtx);
989 }
990
991 netif_tx_start_all_queues(sdata->dev);
992 netif_carrier_on(sdata->dev);
993
994 ieee80211_sta_send_apinfo(sdata);
995 }
996
997 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
998 {
999 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1000 struct ieee80211_local *local = sdata->local;
1001
1002 ifmgd->direct_probe_tries++;
1003 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
1004 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
1005 sdata->dev->name, ifmgd->bssid);
1006 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1007 ieee80211_recalc_idle(local);
1008 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
1009
1010 /*
1011 * Most likely AP is not in the range so remove the
1012 * bss information associated to the AP
1013 */
1014 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1015 sdata->local->hw.conf.channel->center_freq,
1016 ifmgd->ssid, ifmgd->ssid_len);
1017
1018 /*
1019 * We might have a pending scan which had no chance to run yet
1020 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
1021 * Hence, queue the STAs work again
1022 */
1023 queue_work(local->hw.workqueue, &ifmgd->work);
1024 return;
1025 }
1026
1027 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
1028 sdata->dev->name, ifmgd->bssid,
1029 ifmgd->direct_probe_tries);
1030
1031 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1032
1033 /* Direct probe is sent to broadcast address as some APs
1034 * will not answer to direct packet in unassociated state.
1035 */
1036 ieee80211_send_probe_req(sdata, NULL,
1037 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
1038
1039 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
1040 }
1041
1042
1043 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
1044 {
1045 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1046 struct ieee80211_local *local = sdata->local;
1047 u8 *ies;
1048 size_t ies_len;
1049
1050 ifmgd->auth_tries++;
1051 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
1052 printk(KERN_DEBUG "%s: authentication with AP %pM"
1053 " timed out\n",
1054 sdata->dev->name, ifmgd->bssid);
1055 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1056 ieee80211_recalc_idle(local);
1057 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
1058 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1059 sdata->local->hw.conf.channel->center_freq,
1060 ifmgd->ssid, ifmgd->ssid_len);
1061
1062 /*
1063 * We might have a pending scan which had no chance to run yet
1064 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
1065 * Hence, queue the STAs work again
1066 */
1067 queue_work(local->hw.workqueue, &ifmgd->work);
1068 return;
1069 }
1070
1071 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1072 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
1073 sdata->dev->name, ifmgd->bssid);
1074
1075 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1076 ies = ifmgd->sme_auth_ie;
1077 ies_len = ifmgd->sme_auth_ie_len;
1078 } else {
1079 ies = NULL;
1080 ies_len = 0;
1081 }
1082 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
1083 ifmgd->bssid, 0);
1084 ifmgd->auth_transaction = 2;
1085
1086 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
1087 }
1088
1089 /*
1090 * The disassoc 'reason' argument can be either our own reason
1091 * if self disconnected or a reason code from the AP.
1092 */
1093 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1094 bool deauth, bool self_disconnected,
1095 u16 reason)
1096 {
1097 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1098 struct ieee80211_local *local = sdata->local;
1099 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
1100 struct ieee80211_bss *bss;
1101 struct sta_info *sta;
1102 u32 changed = 0, config_changed = 0;
1103
1104 rcu_read_lock();
1105
1106 sta = sta_info_get(local, ifmgd->bssid);
1107 if (!sta) {
1108 rcu_read_unlock();
1109 return;
1110 }
1111
1112 if (deauth) {
1113 ifmgd->direct_probe_tries = 0;
1114 ifmgd->auth_tries = 0;
1115 }
1116 ifmgd->assoc_scan_tries = 0;
1117 ifmgd->assoc_tries = 0;
1118
1119 netif_tx_stop_all_queues(sdata->dev);
1120 netif_carrier_off(sdata->dev);
1121
1122 ieee80211_sta_tear_down_BA_sessions(sta);
1123
1124 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1125 conf->channel->center_freq,
1126 ifmgd->ssid, ifmgd->ssid_len);
1127
1128 if (bss) {
1129 cfg80211_unhold_bss(&bss->cbss);
1130 ieee80211_rx_bss_put(local, bss);
1131 }
1132
1133 if (self_disconnected) {
1134 if (deauth)
1135 ieee80211_send_deauth_disassoc(sdata,
1136 IEEE80211_STYPE_DEAUTH, reason);
1137 else
1138 ieee80211_send_deauth_disassoc(sdata,
1139 IEEE80211_STYPE_DISASSOC, reason);
1140 }
1141
1142 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1143 changed |= ieee80211_reset_erp_info(sdata);
1144
1145 ieee80211_led_assoc(local, 0);
1146 changed |= BSS_CHANGED_ASSOC;
1147 sdata->vif.bss_conf.assoc = false;
1148
1149 ieee80211_sta_send_apinfo(sdata);
1150
1151 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1152 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1153 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1154 sdata->local->hw.conf.channel->center_freq,
1155 ifmgd->ssid, ifmgd->ssid_len);
1156 }
1157
1158 rcu_read_unlock();
1159
1160 ieee80211_set_wmm_default(sdata);
1161
1162 ieee80211_recalc_idle(local);
1163
1164 /* channel(_type) changes are handled by ieee80211_hw_config */
1165 local->oper_channel_type = NL80211_CHAN_NO_HT;
1166
1167 /* on the next assoc, re-program HT parameters */
1168 sdata->ht_opmode_valid = false;
1169
1170 local->power_constr_level = 0;
1171
1172 del_timer_sync(&local->dynamic_ps_timer);
1173 cancel_work_sync(&local->dynamic_ps_enable_work);
1174
1175 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1176 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1177 config_changed |= IEEE80211_CONF_CHANGE_PS;
1178 }
1179
1180 ieee80211_hw_config(local, config_changed);
1181
1182 /* And the BSSID changed -- not very interesting here */
1183 changed |= BSS_CHANGED_BSSID;
1184 ieee80211_bss_info_change_notify(sdata, changed);
1185
1186 rcu_read_lock();
1187
1188 sta = sta_info_get(local, ifmgd->bssid);
1189 if (!sta) {
1190 rcu_read_unlock();
1191 return;
1192 }
1193
1194 sta_info_unlink(&sta);
1195
1196 rcu_read_unlock();
1197
1198 sta_info_destroy(sta);
1199 }
1200
1201 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1202 {
1203 if (!sdata || !sdata->default_key ||
1204 sdata->default_key->conf.alg != ALG_WEP)
1205 return 0;
1206 return 1;
1207 }
1208
1209 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1210 {
1211 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1212 struct ieee80211_local *local = sdata->local;
1213 struct ieee80211_bss *bss;
1214 int bss_privacy;
1215 int wep_privacy;
1216 int privacy_invoked;
1217
1218 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1219 return 0;
1220
1221 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1222 local->hw.conf.channel->center_freq,
1223 ifmgd->ssid, ifmgd->ssid_len);
1224 if (!bss)
1225 return 0;
1226
1227 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1228 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1229 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1230
1231 ieee80211_rx_bss_put(local, bss);
1232
1233 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1234 return 0;
1235
1236 return 1;
1237 }
1238
1239 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1240 {
1241 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1242 struct ieee80211_local *local = sdata->local;
1243
1244 ifmgd->assoc_tries++;
1245 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1246 printk(KERN_DEBUG "%s: association with AP %pM"
1247 " timed out\n",
1248 sdata->dev->name, ifmgd->bssid);
1249 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1250 ieee80211_recalc_idle(local);
1251 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
1252 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1253 sdata->local->hw.conf.channel->center_freq,
1254 ifmgd->ssid, ifmgd->ssid_len);
1255 /*
1256 * We might have a pending scan which had no chance to run yet
1257 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1258 * Hence, queue the STAs work again
1259 */
1260 queue_work(local->hw.workqueue, &ifmgd->work);
1261 return;
1262 }
1263
1264 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1265 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1266 sdata->dev->name, ifmgd->bssid);
1267 if (ieee80211_privacy_mismatch(sdata)) {
1268 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1269 "mixed-cell disabled - abort association\n", sdata->dev->name);
1270 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1271 ieee80211_recalc_idle(local);
1272 return;
1273 }
1274
1275 ieee80211_send_assoc(sdata);
1276
1277 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1278 }
1279
1280 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1281 struct ieee80211_hdr *hdr)
1282 {
1283 /*
1284 * We can postpone the mgd.timer whenever receiving unicast frames
1285 * from AP because we know that the connection is working both ways
1286 * at that time. But multicast frames (and hence also beacons) must
1287 * be ignored here, because we need to trigger the timer during
1288 * data idle periods for sending the periodical probe request to
1289 * the AP.
1290 */
1291 if (!is_multicast_ether_addr(hdr->addr1))
1292 mod_timer(&sdata->u.mgd.timer,
1293 jiffies + IEEE80211_MONITORING_INTERVAL);
1294 }
1295
1296 void ieee80211_beacon_loss_work(struct work_struct *work)
1297 {
1298 struct ieee80211_sub_if_data *sdata =
1299 container_of(work, struct ieee80211_sub_if_data,
1300 u.mgd.beacon_loss_work);
1301 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1302
1303 /*
1304 * The driver has already reported this event and we have
1305 * already sent a probe request. Maybe the AP died and the
1306 * driver keeps reporting until we disassociate... We have
1307 * to ignore that because otherwise we would continually
1308 * reset the timer and never check whether we received a
1309 * probe response!
1310 */
1311 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1312 return;
1313
1314 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1315 if (net_ratelimit()) {
1316 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1317 "- sending probe request\n", sdata->dev->name,
1318 sdata->u.mgd.bssid);
1319 }
1320 #endif
1321
1322 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1323 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1324 ifmgd->ssid_len, NULL, 0);
1325
1326 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1327 }
1328
1329 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1330 {
1331 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1332
1333 queue_work(sdata->local->hw.workqueue,
1334 &sdata->u.mgd.beacon_loss_work);
1335 }
1336 EXPORT_SYMBOL(ieee80211_beacon_loss);
1337
1338 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1339 {
1340 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1341 struct ieee80211_local *local = sdata->local;
1342 struct sta_info *sta;
1343 bool disassoc = false;
1344
1345 /* TODO: start monitoring current AP signal quality and number of
1346 * missed beacons. Scan other channels every now and then and search
1347 * for better APs. */
1348 /* TODO: remove expired BSSes */
1349
1350 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1351
1352 rcu_read_lock();
1353
1354 sta = sta_info_get(local, ifmgd->bssid);
1355 if (!sta) {
1356 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1357 sdata->dev->name, ifmgd->bssid);
1358 disassoc = true;
1359 goto unlock;
1360 }
1361
1362 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1363 time_after(jiffies, sta->last_rx + IEEE80211_PROBE_WAIT)) {
1364 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1365 "- disassociating\n",
1366 sdata->dev->name, ifmgd->bssid);
1367 disassoc = true;
1368 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1369 goto unlock;
1370 }
1371
1372 /*
1373 * Beacon filtering is only enabled with power save and then the
1374 * stack should not check for beacon loss.
1375 */
1376 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1377 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1378 time_after(jiffies,
1379 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1380 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1381 if (net_ratelimit()) {
1382 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1383 "- sending probe request\n",
1384 sdata->dev->name, ifmgd->bssid);
1385 }
1386 #endif
1387 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1388 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1389 ifmgd->ssid_len, NULL, 0);
1390 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
1391 goto unlock;
1392 }
1393
1394 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1395 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1396 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1397 ifmgd->ssid_len, NULL, 0);
1398 }
1399
1400 if (!disassoc)
1401 mod_timer(&ifmgd->timer,
1402 jiffies + IEEE80211_MONITORING_INTERVAL);
1403
1404 unlock:
1405 rcu_read_unlock();
1406
1407 if (disassoc)
1408 ieee80211_set_disassoc(sdata, true, true,
1409 WLAN_REASON_PREV_AUTH_NOT_VALID);
1410 }
1411
1412
1413 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1414 {
1415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1416
1417 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1418 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1419 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1420 /* Wait for SME to request association */
1421 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1422 ieee80211_recalc_idle(sdata->local);
1423 } else
1424 ieee80211_associate(sdata);
1425 }
1426
1427
1428 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1429 struct ieee80211_mgmt *mgmt,
1430 size_t len)
1431 {
1432 u8 *pos;
1433 struct ieee802_11_elems elems;
1434
1435 pos = mgmt->u.auth.variable;
1436 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1437 if (!elems.challenge)
1438 return;
1439 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1440 elems.challenge - 2, elems.challenge_len + 2,
1441 sdata->u.mgd.bssid, 1);
1442 sdata->u.mgd.auth_transaction = 4;
1443 }
1444
1445 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1446 struct ieee80211_mgmt *mgmt,
1447 size_t len)
1448 {
1449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1450 u16 auth_alg, auth_transaction, status_code;
1451
1452 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1453 return;
1454
1455 if (len < 24 + 6)
1456 return;
1457
1458 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1459 return;
1460
1461 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1462 return;
1463
1464 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1465 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1466 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1467
1468 if (auth_alg != ifmgd->auth_alg ||
1469 auth_transaction != ifmgd->auth_transaction)
1470 return;
1471
1472 if (status_code != WLAN_STATUS_SUCCESS) {
1473 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1474 u8 algs[3];
1475 const int num_algs = ARRAY_SIZE(algs);
1476 int i, pos;
1477 algs[0] = algs[1] = algs[2] = 0xff;
1478 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1479 algs[0] = WLAN_AUTH_OPEN;
1480 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1481 algs[1] = WLAN_AUTH_SHARED_KEY;
1482 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1483 algs[2] = WLAN_AUTH_LEAP;
1484 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1485 pos = 0;
1486 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1487 pos = 1;
1488 else
1489 pos = 2;
1490 for (i = 0; i < num_algs; i++) {
1491 pos++;
1492 if (pos >= num_algs)
1493 pos = 0;
1494 if (algs[pos] == ifmgd->auth_alg ||
1495 algs[pos] == 0xff)
1496 continue;
1497 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1498 !ieee80211_sta_wep_configured(sdata))
1499 continue;
1500 ifmgd->auth_alg = algs[pos];
1501 break;
1502 }
1503 }
1504 return;
1505 }
1506
1507 switch (ifmgd->auth_alg) {
1508 case WLAN_AUTH_OPEN:
1509 case WLAN_AUTH_LEAP:
1510 case WLAN_AUTH_FT:
1511 ieee80211_auth_completed(sdata);
1512 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1513 break;
1514 case WLAN_AUTH_SHARED_KEY:
1515 if (ifmgd->auth_transaction == 4) {
1516 ieee80211_auth_completed(sdata);
1517 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1518 } else
1519 ieee80211_auth_challenge(sdata, mgmt, len);
1520 break;
1521 }
1522 }
1523
1524
1525 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1526 struct ieee80211_mgmt *mgmt,
1527 size_t len)
1528 {
1529 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1530 u16 reason_code;
1531
1532 if (len < 24 + 2)
1533 return;
1534
1535 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1536 return;
1537
1538 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1539
1540 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1541 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1542 sdata->dev->name, reason_code);
1543
1544 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1545 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1546 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1547 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1548 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1549 mod_timer(&ifmgd->timer, jiffies +
1550 IEEE80211_RETRY_AUTH_INTERVAL);
1551 }
1552
1553 ieee80211_set_disassoc(sdata, true, false, 0);
1554 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1555 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
1556 }
1557
1558
1559 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1560 struct ieee80211_mgmt *mgmt,
1561 size_t len)
1562 {
1563 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1564 u16 reason_code;
1565
1566 if (len < 24 + 2)
1567 return;
1568
1569 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1570 return;
1571
1572 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1573
1574 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1575 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1576 sdata->dev->name, reason_code);
1577
1578 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1579 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1580 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1581 mod_timer(&ifmgd->timer, jiffies +
1582 IEEE80211_RETRY_AUTH_INTERVAL);
1583 }
1584
1585 ieee80211_set_disassoc(sdata, false, false, reason_code);
1586 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
1587 }
1588
1589
1590 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1591 struct ieee80211_mgmt *mgmt,
1592 size_t len,
1593 int reassoc)
1594 {
1595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1596 struct ieee80211_local *local = sdata->local;
1597 struct ieee80211_supported_band *sband;
1598 struct sta_info *sta;
1599 u32 rates, basic_rates;
1600 u16 capab_info, status_code, aid;
1601 struct ieee802_11_elems elems;
1602 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1603 u8 *pos;
1604 u32 changed = 0;
1605 int i, j;
1606 bool have_higher_than_11mbit = false, newsta = false;
1607 u16 ap_ht_cap_flags;
1608
1609 /* AssocResp and ReassocResp have identical structure, so process both
1610 * of them in this function. */
1611
1612 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1613 return;
1614
1615 if (len < 24 + 6)
1616 return;
1617
1618 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1619 return;
1620
1621 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1622 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1623 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1624
1625 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1626 "status=%d aid=%d)\n",
1627 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1628 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1629
1630 pos = mgmt->u.assoc_resp.variable;
1631 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1632
1633 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1634 elems.timeout_int && elems.timeout_int_len == 5 &&
1635 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1636 u32 tu, ms;
1637 tu = get_unaligned_le32(elems.timeout_int + 1);
1638 ms = tu * 1024 / 1000;
1639 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1640 "comeback duration %u TU (%u ms)\n",
1641 sdata->dev->name, tu, ms);
1642 if (ms > IEEE80211_ASSOC_TIMEOUT)
1643 mod_timer(&ifmgd->timer,
1644 jiffies + msecs_to_jiffies(ms));
1645 return;
1646 }
1647
1648 if (status_code != WLAN_STATUS_SUCCESS) {
1649 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1650 sdata->dev->name, status_code);
1651 /* if this was a reassociation, ensure we try a "full"
1652 * association next time. This works around some broken APs
1653 * which do not correctly reject reassociation requests. */
1654 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1655 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1656 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1657 /* Wait for SME to decide what to do next */
1658 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1659 ieee80211_recalc_idle(local);
1660 }
1661 return;
1662 }
1663
1664 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1665 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1666 "set\n", sdata->dev->name, aid);
1667 aid &= ~(BIT(15) | BIT(14));
1668
1669 if (!elems.supp_rates) {
1670 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1671 sdata->dev->name);
1672 return;
1673 }
1674
1675 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1676 ifmgd->aid = aid;
1677 ifmgd->ap_capab = capab_info;
1678
1679 kfree(ifmgd->assocresp_ies);
1680 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1681 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1682 if (ifmgd->assocresp_ies)
1683 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1684
1685 rcu_read_lock();
1686
1687 /* Add STA entry for the AP */
1688 sta = sta_info_get(local, ifmgd->bssid);
1689 if (!sta) {
1690 newsta = true;
1691
1692 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1693 if (!sta) {
1694 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1695 " the AP\n", sdata->dev->name);
1696 rcu_read_unlock();
1697 return;
1698 }
1699
1700 /* update new sta with its last rx activity */
1701 sta->last_rx = jiffies;
1702 }
1703
1704 /*
1705 * FIXME: Do we really need to update the sta_info's information here?
1706 * We already know about the AP (we found it in our list) so it
1707 * should already be filled with the right info, no?
1708 * As is stands, all this is racy because typically we assume
1709 * the information that is filled in here (except flags) doesn't
1710 * change while a STA structure is alive. As such, it should move
1711 * to between the sta_info_alloc() and sta_info_insert() above.
1712 */
1713
1714 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP);
1715 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1716 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1717
1718 rates = 0;
1719 basic_rates = 0;
1720 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1721
1722 for (i = 0; i < elems.supp_rates_len; i++) {
1723 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1724 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1725
1726 if (rate > 110)
1727 have_higher_than_11mbit = true;
1728
1729 for (j = 0; j < sband->n_bitrates; j++) {
1730 if (sband->bitrates[j].bitrate == rate) {
1731 rates |= BIT(j);
1732 if (is_basic)
1733 basic_rates |= BIT(j);
1734 break;
1735 }
1736 }
1737 }
1738
1739 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1740 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1741 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1742
1743 if (rate > 110)
1744 have_higher_than_11mbit = true;
1745
1746 for (j = 0; j < sband->n_bitrates; j++) {
1747 if (sband->bitrates[j].bitrate == rate) {
1748 rates |= BIT(j);
1749 if (is_basic)
1750 basic_rates |= BIT(j);
1751 break;
1752 }
1753 }
1754 }
1755
1756 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1757 sdata->vif.bss_conf.basic_rates = basic_rates;
1758
1759 /* cf. IEEE 802.11 9.2.12 */
1760 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1761 have_higher_than_11mbit)
1762 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1763 else
1764 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1765
1766 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1767 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1768 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1769 elems.ht_cap_elem, &sta->sta.ht_cap);
1770
1771 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1772
1773 rate_control_rate_init(sta);
1774
1775 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1776 set_sta_flags(sta, WLAN_STA_MFP);
1777
1778 if (elems.wmm_param)
1779 set_sta_flags(sta, WLAN_STA_WME);
1780
1781 if (newsta) {
1782 int err = sta_info_insert(sta);
1783 if (err) {
1784 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1785 " the AP (error %d)\n", sdata->dev->name, err);
1786 rcu_read_unlock();
1787 return;
1788 }
1789 }
1790
1791 rcu_read_unlock();
1792
1793 if (elems.wmm_param)
1794 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1795 elems.wmm_param_len);
1796 else
1797 ieee80211_set_wmm_default(sdata);
1798
1799 if (elems.ht_info_elem && elems.wmm_param &&
1800 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1801 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1802 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1803 ap_ht_cap_flags);
1804
1805 /* set AID and assoc capability,
1806 * ieee80211_set_associated() will tell the driver */
1807 bss_conf->aid = aid;
1808 bss_conf->assoc_capability = capab_info;
1809 ieee80211_set_associated(sdata, changed);
1810
1811 /*
1812 * initialise the time of last beacon to be the association time,
1813 * otherwise beacon loss check will trigger immediately
1814 */
1815 ifmgd->last_beacon = jiffies;
1816
1817 ieee80211_associated(sdata);
1818 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1819 }
1820
1821
1822 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1823 struct ieee80211_mgmt *mgmt,
1824 size_t len,
1825 struct ieee80211_rx_status *rx_status,
1826 struct ieee802_11_elems *elems,
1827 bool beacon)
1828 {
1829 struct ieee80211_local *local = sdata->local;
1830 int freq;
1831 struct ieee80211_bss *bss;
1832 struct ieee80211_channel *channel;
1833
1834 if (elems->ds_params && elems->ds_params_len == 1)
1835 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1836 else
1837 freq = rx_status->freq;
1838
1839 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1840
1841 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1842 return;
1843
1844 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1845 channel, beacon);
1846 if (!bss)
1847 return;
1848
1849 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1850 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1851 struct ieee80211_channel_sw_ie *sw_elem =
1852 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1853 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
1854 }
1855
1856 ieee80211_rx_bss_put(local, bss);
1857 }
1858
1859
1860 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1861 struct ieee80211_mgmt *mgmt,
1862 size_t len,
1863 struct ieee80211_rx_status *rx_status)
1864 {
1865 struct ieee80211_if_managed *ifmgd;
1866 size_t baselen;
1867 struct ieee802_11_elems elems;
1868
1869 ifmgd = &sdata->u.mgd;
1870
1871 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1872 return; /* ignore ProbeResp to foreign address */
1873
1874 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1875 if (baselen > len)
1876 return;
1877
1878 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1879 &elems);
1880
1881 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1882
1883 /* direct probe may be part of the association flow */
1884 if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
1885 printk(KERN_DEBUG "%s direct probe responded\n",
1886 sdata->dev->name);
1887 ieee80211_authenticate(sdata);
1888 }
1889
1890 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1891 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1892 }
1893
1894 /*
1895 * This is the canonical list of information elements we care about,
1896 * the filter code also gives us all changes to the Microsoft OUI
1897 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1898 *
1899 * We implement beacon filtering in software since that means we can
1900 * avoid processing the frame here and in cfg80211, and userspace
1901 * will not be able to tell whether the hardware supports it or not.
1902 *
1903 * XXX: This list needs to be dynamic -- userspace needs to be able to
1904 * add items it requires. It also needs to be able to tell us to
1905 * look out for other vendor IEs.
1906 */
1907 static const u64 care_about_ies =
1908 (1ULL << WLAN_EID_COUNTRY) |
1909 (1ULL << WLAN_EID_ERP_INFO) |
1910 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1911 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1912 (1ULL << WLAN_EID_HT_CAPABILITY) |
1913 (1ULL << WLAN_EID_HT_INFORMATION);
1914
1915 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1916 struct ieee80211_mgmt *mgmt,
1917 size_t len,
1918 struct ieee80211_rx_status *rx_status)
1919 {
1920 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1921 size_t baselen;
1922 struct ieee802_11_elems elems;
1923 struct ieee80211_local *local = sdata->local;
1924 u32 changed = 0;
1925 bool erp_valid, directed_tim = false;
1926 u8 erp_value = 0;
1927 u32 ncrc;
1928
1929 /* Process beacon from the current BSS */
1930 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1931 if (baselen > len)
1932 return;
1933
1934 if (rx_status->freq != local->hw.conf.channel->center_freq)
1935 return;
1936
1937 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1938 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1939 return;
1940
1941 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1942 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1943 if (net_ratelimit()) {
1944 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1945 "to a received beacon\n", sdata->dev->name);
1946 }
1947 #endif
1948 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1949 }
1950
1951 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1952 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1953 len - baselen, &elems,
1954 care_about_ies, ncrc);
1955
1956 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1957 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1958 ifmgd->aid);
1959
1960 if (ncrc != ifmgd->beacon_crc) {
1961 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1962 true);
1963
1964 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1965 elems.wmm_param_len);
1966 }
1967
1968 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1969 if (directed_tim) {
1970 if (local->hw.conf.dynamic_ps_timeout > 0) {
1971 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1972 ieee80211_hw_config(local,
1973 IEEE80211_CONF_CHANGE_PS);
1974 ieee80211_send_nullfunc(local, sdata, 0);
1975 } else {
1976 local->pspolling = true;
1977
1978 /*
1979 * Here is assumed that the driver will be
1980 * able to send ps-poll frame and receive a
1981 * response even though power save mode is
1982 * enabled, but some drivers might require
1983 * to disable power save here. This needs
1984 * to be investigated.
1985 */
1986 ieee80211_send_pspoll(local, sdata);
1987 }
1988 }
1989 }
1990
1991 if (ncrc == ifmgd->beacon_crc)
1992 return;
1993 ifmgd->beacon_crc = ncrc;
1994
1995 if (elems.erp_info && elems.erp_info_len >= 1) {
1996 erp_valid = true;
1997 erp_value = elems.erp_info[0];
1998 } else {
1999 erp_valid = false;
2000 }
2001 changed |= ieee80211_handle_bss_capability(sdata,
2002 le16_to_cpu(mgmt->u.beacon.capab_info),
2003 erp_valid, erp_value);
2004
2005
2006 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2007 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
2008 struct sta_info *sta;
2009 struct ieee80211_supported_band *sband;
2010 u16 ap_ht_cap_flags;
2011
2012 rcu_read_lock();
2013
2014 sta = sta_info_get(local, ifmgd->bssid);
2015 if (!sta) {
2016 rcu_read_unlock();
2017 return;
2018 }
2019
2020 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2021
2022 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
2023 elems.ht_cap_elem, &sta->sta.ht_cap);
2024
2025 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2026
2027 rcu_read_unlock();
2028
2029 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
2030 ap_ht_cap_flags);
2031 }
2032
2033 if (elems.country_elem) {
2034 /* Note we are only reviewing this on beacons
2035 * for the BSSID we are associated to */
2036 regulatory_hint_11d(local->hw.wiphy,
2037 elems.country_elem, elems.country_elem_len);
2038
2039 /* TODO: IBSS also needs this */
2040 if (elems.pwr_constr_elem)
2041 ieee80211_handle_pwr_constr(sdata,
2042 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2043 elems.pwr_constr_elem,
2044 elems.pwr_constr_elem_len);
2045 }
2046
2047 ieee80211_bss_info_change_notify(sdata, changed);
2048 }
2049
2050 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
2051 struct sk_buff *skb,
2052 struct ieee80211_rx_status *rx_status)
2053 {
2054 struct ieee80211_local *local = sdata->local;
2055 struct ieee80211_mgmt *mgmt;
2056 u16 fc;
2057
2058 if (skb->len < 24)
2059 return RX_DROP_MONITOR;
2060
2061 mgmt = (struct ieee80211_mgmt *) skb->data;
2062 fc = le16_to_cpu(mgmt->frame_control);
2063
2064 switch (fc & IEEE80211_FCTL_STYPE) {
2065 case IEEE80211_STYPE_PROBE_REQ:
2066 case IEEE80211_STYPE_PROBE_RESP:
2067 case IEEE80211_STYPE_BEACON:
2068 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2069 case IEEE80211_STYPE_AUTH:
2070 case IEEE80211_STYPE_ASSOC_RESP:
2071 case IEEE80211_STYPE_REASSOC_RESP:
2072 case IEEE80211_STYPE_DEAUTH:
2073 case IEEE80211_STYPE_DISASSOC:
2074 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
2075 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
2076 return RX_QUEUED;
2077 }
2078
2079 return RX_DROP_MONITOR;
2080 }
2081
2082 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2083 struct sk_buff *skb)
2084 {
2085 struct ieee80211_rx_status *rx_status;
2086 struct ieee80211_mgmt *mgmt;
2087 u16 fc;
2088
2089 rx_status = (struct ieee80211_rx_status *) skb->cb;
2090 mgmt = (struct ieee80211_mgmt *) skb->data;
2091 fc = le16_to_cpu(mgmt->frame_control);
2092
2093 switch (fc & IEEE80211_FCTL_STYPE) {
2094 case IEEE80211_STYPE_PROBE_RESP:
2095 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
2096 rx_status);
2097 break;
2098 case IEEE80211_STYPE_BEACON:
2099 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2100 rx_status);
2101 break;
2102 case IEEE80211_STYPE_AUTH:
2103 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2104 break;
2105 case IEEE80211_STYPE_ASSOC_RESP:
2106 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
2107 break;
2108 case IEEE80211_STYPE_REASSOC_RESP:
2109 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
2110 break;
2111 case IEEE80211_STYPE_DEAUTH:
2112 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2113 break;
2114 case IEEE80211_STYPE_DISASSOC:
2115 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2116 break;
2117 }
2118
2119 kfree_skb(skb);
2120 }
2121
2122 static void ieee80211_sta_timer(unsigned long data)
2123 {
2124 struct ieee80211_sub_if_data *sdata =
2125 (struct ieee80211_sub_if_data *) data;
2126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2127 struct ieee80211_local *local = sdata->local;
2128
2129 if (local->quiescing) {
2130 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2131 return;
2132 }
2133
2134 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2135 queue_work(local->hw.workqueue, &ifmgd->work);
2136 }
2137
2138 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
2139 {
2140 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2141 struct ieee80211_local *local = sdata->local;
2142
2143 /* Reset own TSF to allow time synchronization work. */
2144 drv_reset_tsf(local);
2145
2146 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
2147
2148
2149 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2150 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2151 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2152 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
2153 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2154 ifmgd->auth_alg = WLAN_AUTH_LEAP;
2155 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
2156 ifmgd->auth_alg = WLAN_AUTH_FT;
2157 else
2158 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2159 ifmgd->auth_transaction = -1;
2160 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2161 ifmgd->assoc_scan_tries = 0;
2162 ifmgd->direct_probe_tries = 0;
2163 ifmgd->auth_tries = 0;
2164 ifmgd->assoc_tries = 0;
2165 netif_tx_stop_all_queues(sdata->dev);
2166 netif_carrier_off(sdata->dev);
2167 }
2168
2169 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2170 {
2171 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2172 struct ieee80211_local *local = sdata->local;
2173 struct ieee80211_bss *bss;
2174 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2175 u8 ssid_len = ifmgd->ssid_len;
2176 u16 capa_mask = WLAN_CAPABILITY_ESS;
2177 u16 capa_val = WLAN_CAPABILITY_ESS;
2178 struct ieee80211_channel *chan = local->oper_channel;
2179
2180 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2181 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2182 IEEE80211_STA_AUTO_BSSID_SEL |
2183 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2184 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2185 if (sdata->default_key)
2186 capa_val |= WLAN_CAPABILITY_PRIVACY;
2187 }
2188
2189 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2190 chan = NULL;
2191
2192 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2193 bssid = NULL;
2194
2195 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2196 ssid = NULL;
2197 ssid_len = 0;
2198 }
2199
2200 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2201 bssid, ssid, ssid_len,
2202 capa_mask, capa_val);
2203
2204 if (bss) {
2205 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
2206 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2207 ieee80211_sta_set_ssid(sdata, bss->ssid,
2208 bss->ssid_len);
2209 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2210 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2211 bss->supp_rates);
2212 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2213 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2214 else
2215 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2216
2217 /* Send out direct probe if no probe resp was received or
2218 * the one we have is outdated
2219 */
2220 if (!bss->last_probe_resp ||
2221 time_after(jiffies, bss->last_probe_resp
2222 + IEEE80211_SCAN_RESULT_EXPIRE))
2223 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2224 else
2225 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2226
2227 ieee80211_rx_bss_put(local, bss);
2228 ieee80211_sta_reset_auth(sdata);
2229 return 0;
2230 } else {
2231 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2232
2233 ifmgd->assoc_scan_tries++;
2234
2235 ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2236 ssid_len);
2237
2238 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2239 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2240 } else {
2241 ifmgd->assoc_scan_tries = 0;
2242 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2243 ieee80211_recalc_idle(local);
2244 }
2245 }
2246 return -1;
2247 }
2248
2249
2250 static void ieee80211_sta_work(struct work_struct *work)
2251 {
2252 struct ieee80211_sub_if_data *sdata =
2253 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2254 struct ieee80211_local *local = sdata->local;
2255 struct ieee80211_if_managed *ifmgd;
2256 struct sk_buff *skb;
2257
2258 if (!netif_running(sdata->dev))
2259 return;
2260
2261 if (local->sw_scanning || local->hw_scanning)
2262 return;
2263
2264 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2265 return;
2266
2267 /*
2268 * Nothing should have been stuffed into the workqueue during
2269 * the suspend->resume cycle. If this WARN is seen then there
2270 * is a bug with either the driver suspend or something in
2271 * mac80211 stuffing into the workqueue which we haven't yet
2272 * cleared during mac80211's suspend cycle.
2273 */
2274 if (WARN_ON(local->suspended))
2275 return;
2276
2277 ifmgd = &sdata->u.mgd;
2278
2279 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2280 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2281
2282 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2283 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2284 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2285 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2286 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2287 round_jiffies_relative(0));
2288 return;
2289 }
2290
2291 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2292 if (ieee80211_sta_config_auth(sdata))
2293 return;
2294 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2295 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2296 return;
2297
2298 ieee80211_recalc_idle(local);
2299
2300 switch (ifmgd->state) {
2301 case IEEE80211_STA_MLME_DISABLED:
2302 break;
2303 case IEEE80211_STA_MLME_DIRECT_PROBE:
2304 ieee80211_direct_probe(sdata);
2305 break;
2306 case IEEE80211_STA_MLME_AUTHENTICATE:
2307 ieee80211_authenticate(sdata);
2308 break;
2309 case IEEE80211_STA_MLME_ASSOCIATE:
2310 ieee80211_associate(sdata);
2311 break;
2312 case IEEE80211_STA_MLME_ASSOCIATED:
2313 ieee80211_associated(sdata);
2314 break;
2315 default:
2316 WARN_ON(1);
2317 break;
2318 }
2319
2320 if (ieee80211_privacy_mismatch(sdata)) {
2321 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2322 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2323
2324 ieee80211_set_disassoc(sdata, false, true,
2325 WLAN_REASON_UNSPECIFIED);
2326 }
2327 }
2328
2329 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2330 {
2331 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2332 /*
2333 * Need to update last_beacon to avoid beacon loss
2334 * test to trigger.
2335 */
2336 sdata->u.mgd.last_beacon = jiffies;
2337
2338
2339 queue_work(sdata->local->hw.workqueue,
2340 &sdata->u.mgd.work);
2341 }
2342 }
2343
2344 #ifdef CONFIG_PM
2345 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2346 {
2347 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2348
2349 /*
2350 * we need to use atomic bitops for the running bits
2351 * only because both timers might fire at the same
2352 * time -- the code here is properly synchronised.
2353 */
2354
2355 cancel_work_sync(&ifmgd->work);
2356 cancel_work_sync(&ifmgd->beacon_loss_work);
2357 if (del_timer_sync(&ifmgd->timer))
2358 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2359
2360 cancel_work_sync(&ifmgd->chswitch_work);
2361 if (del_timer_sync(&ifmgd->chswitch_timer))
2362 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2363 }
2364
2365 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2366 {
2367 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2368
2369 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2370 add_timer(&ifmgd->timer);
2371 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2372 add_timer(&ifmgd->chswitch_timer);
2373 }
2374 #endif
2375
2376 /* interface setup */
2377 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2378 {
2379 struct ieee80211_if_managed *ifmgd;
2380 u32 hw_flags;
2381
2382 ifmgd = &sdata->u.mgd;
2383 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2384 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2385 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2386 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2387 (unsigned long) sdata);
2388 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2389 (unsigned long) sdata);
2390 skb_queue_head_init(&ifmgd->skb_queue);
2391
2392 ifmgd->capab = WLAN_CAPABILITY_ESS;
2393 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2394 IEEE80211_AUTH_ALG_SHARED_KEY;
2395 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
2396 IEEE80211_STA_AUTO_BSSID_SEL |
2397 IEEE80211_STA_AUTO_CHANNEL_SEL;
2398 if (sdata->local->hw.queues >= 4)
2399 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2400
2401 hw_flags = sdata->local->hw.flags;
2402
2403 if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2404 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2405 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2406 }
2407 }
2408
2409 /* configuration hooks */
2410 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2411 {
2412 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2413 struct ieee80211_local *local = sdata->local;
2414
2415 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2416 return;
2417
2418 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
2419 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2420 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
2421 IEEE80211_STA_AUTO_SSID_SEL))) {
2422
2423 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2424 ieee80211_set_disassoc(sdata, true, true,
2425 WLAN_REASON_DEAUTH_LEAVING);
2426
2427 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2428 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2429 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2430 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2431 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2432 queue_work(local->hw.workqueue, &ifmgd->work);
2433 }
2434 }
2435
2436 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2437 {
2438 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2439
2440 if (ifmgd->ssid_len)
2441 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2442 else
2443 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2444
2445 return 0;
2446 }
2447
2448 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2449 {
2450 struct ieee80211_if_managed *ifmgd;
2451
2452 if (len > IEEE80211_MAX_SSID_LEN)
2453 return -EINVAL;
2454
2455 ifmgd = &sdata->u.mgd;
2456
2457 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2458 /*
2459 * Do not use reassociation if SSID is changed (different ESS).
2460 */
2461 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2462 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2463 memcpy(ifmgd->ssid, ssid, len);
2464 ifmgd->ssid_len = len;
2465 }
2466
2467 return ieee80211_sta_commit(sdata);
2468 }
2469
2470 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2471 {
2472 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2473 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2474 *len = ifmgd->ssid_len;
2475 return 0;
2476 }
2477
2478 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2479 {
2480 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2481
2482 if (is_valid_ether_addr(bssid)) {
2483 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2484 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2485 } else {
2486 memset(ifmgd->bssid, 0, ETH_ALEN);
2487 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2488 }
2489
2490 return ieee80211_sta_commit(sdata);
2491 }
2492
2493 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2494 const char *ie, size_t len)
2495 {
2496 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2497
2498 if (len == 0 && ifmgd->extra_ie_len == 0)
2499 return -EALREADY;
2500
2501 if (len == ifmgd->extra_ie_len && ifmgd->extra_ie &&
2502 memcmp(ifmgd->extra_ie, ie, len) == 0)
2503 return -EALREADY;
2504
2505 kfree(ifmgd->extra_ie);
2506 if (len == 0) {
2507 ifmgd->extra_ie = NULL;
2508 ifmgd->extra_ie_len = 0;
2509 return 0;
2510 }
2511 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2512 if (!ifmgd->extra_ie) {
2513 ifmgd->extra_ie_len = 0;
2514 return -ENOMEM;
2515 }
2516 memcpy(ifmgd->extra_ie, ie, len);
2517 ifmgd->extra_ie_len = len;
2518 return 0;
2519 }
2520
2521 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2522 {
2523 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2524 sdata->dev->name, reason);
2525
2526 ieee80211_set_disassoc(sdata, true, true, reason);
2527 return 0;
2528 }
2529
2530 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2531 {
2532 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2533
2534 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2535 sdata->dev->name, reason);
2536
2537 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2538 return -ENOLINK;
2539
2540 ieee80211_set_disassoc(sdata, false, true, reason);
2541 return 0;
2542 }
2543
2544 /* scan finished notification */
2545 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2546 {
2547 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2548
2549 /* Restart STA timers */
2550 rcu_read_lock();
2551 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2552 ieee80211_restart_sta_timer(sdata);
2553 rcu_read_unlock();
2554 }
2555
2556 int ieee80211_max_network_latency(struct notifier_block *nb,
2557 unsigned long data, void *dummy)
2558 {
2559 s32 latency_usec = (s32) data;
2560 struct ieee80211_local *local =
2561 container_of(nb, struct ieee80211_local,
2562 network_latency_notifier);
2563
2564 mutex_lock(&local->iflist_mtx);
2565 ieee80211_recalc_ps(local, latency_usec);
2566 mutex_unlock(&local->iflist_mtx);
2567
2568 return 0;
2569 }
(deprecated) Btrfs devel tree