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mac80211: tell driver when idle
[linux-2.6/verdex.git] / net / mac80211 / mlme.c
blob5509c5aa6beb8e25f46276a026f98c81e5ab7389
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_IDLE_TIME (60 * HZ)
37 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
38
39 /* utils */
40 static int ecw2cw(int ecw)
41 {
42 return (1 << ecw) - 1;
43 }
44
45 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
46 {
47 u8 *end, *pos;
48
49 pos = bss->cbss.information_elements;
50 if (pos == NULL)
51 return NULL;
52 end = pos + bss->cbss.len_information_elements;
53
54 while (pos + 1 < end) {
55 if (pos + 2 + pos[1] > end)
56 break;
57 if (pos[0] == ie)
58 return pos;
59 pos += 2 + pos[1];
60 }
61
62 return NULL;
63 }
64
65 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
66 struct ieee80211_supported_band *sband,
67 u32 *rates)
68 {
69 int i, j, count;
70 *rates = 0;
71 count = 0;
72 for (i = 0; i < bss->supp_rates_len; i++) {
73 int rate = (bss->supp_rates[i] & 0x7F) * 5;
74
75 for (j = 0; j < sband->n_bitrates; j++)
76 if (sband->bitrates[j].bitrate == rate) {
77 *rates |= BIT(j);
78 count++;
79 break;
80 }
81 }
82
83 return count;
84 }
85
86 /*
87 * ieee80211_enable_ht should be called only after the operating band
88 * has been determined as ht configuration depends on the hw's
89 * HT abilities for a specific band.
90 */
91 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
92 struct ieee80211_ht_info *hti,
93 u16 ap_ht_cap_flags)
94 {
95 struct ieee80211_local *local = sdata->local;
96 struct ieee80211_supported_band *sband;
97 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
98 struct ieee80211_bss_ht_conf ht;
99 struct sta_info *sta;
100 u32 changed = 0;
101 bool enable_ht = true, ht_changed;
102 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
103
104 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
105
106 memset(&ht, 0, sizeof(ht));
107
108 /* HT is not supported */
109 if (!sband->ht_cap.ht_supported)
110 enable_ht = false;
111
112 /* check that channel matches the right operating channel */
113 if (local->hw.conf.channel->center_freq !=
114 ieee80211_channel_to_frequency(hti->control_chan))
115 enable_ht = false;
116
117 if (enable_ht) {
118 channel_type = NL80211_CHAN_HT20;
119
120 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
121 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
122 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
123 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
124 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
125 channel_type = NL80211_CHAN_HT40PLUS;
126 break;
127 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
128 channel_type = NL80211_CHAN_HT40MINUS;
129 break;
130 }
131 }
132 }
133
134 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
135 channel_type != local->hw.conf.channel_type;
136
137 local->oper_channel_type = channel_type;
138
139 if (ht_changed) {
140 /* channel_type change automatically detected */
141 ieee80211_hw_config(local, 0);
142
143 rcu_read_lock();
144
145 sta = sta_info_get(local, ifmgd->bssid);
146 if (sta)
147 rate_control_rate_update(local, sband, sta,
148 IEEE80211_RC_HT_CHANGED);
149
150 rcu_read_unlock();
151
152 }
153
154 /* disable HT */
155 if (!enable_ht)
156 return 0;
157
158 ht.operation_mode = le16_to_cpu(hti->operation_mode);
159
160 /* if bss configuration changed store the new one */
161 if (memcmp(&sdata->vif.bss_conf.ht, &ht, sizeof(ht))) {
162 changed |= BSS_CHANGED_HT;
163 sdata->vif.bss_conf.ht = ht;
164 }
165
166 return changed;
167 }
168
169 /* frame sending functions */
170
171 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
172 {
173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
174 struct ieee80211_local *local = sdata->local;
175 struct sk_buff *skb;
176 struct ieee80211_mgmt *mgmt;
177 u8 *pos, *ies, *ht_ie;
178 int i, len, count, rates_len, supp_rates_len;
179 u16 capab;
180 struct ieee80211_bss *bss;
181 int wmm = 0;
182 struct ieee80211_supported_band *sband;
183 u32 rates = 0;
184
185 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
186 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
187 ifmgd->ssid_len);
188 if (!skb) {
189 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
190 "frame\n", sdata->dev->name);
191 return;
192 }
193 skb_reserve(skb, local->hw.extra_tx_headroom);
194
195 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
196
197 capab = ifmgd->capab;
198
199 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
200 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
201 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
202 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
203 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
204 }
205
206 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
207 local->hw.conf.channel->center_freq,
208 ifmgd->ssid, ifmgd->ssid_len);
209 if (bss) {
210 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
211 capab |= WLAN_CAPABILITY_PRIVACY;
212 if (bss->wmm_used)
213 wmm = 1;
214
215 /* get all rates supported by the device and the AP as
216 * some APs don't like getting a superset of their rates
217 * in the association request (e.g. D-Link DAP 1353 in
218 * b-only mode) */
219 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
220
221 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
222 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
223 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
224
225 ieee80211_rx_bss_put(local, bss);
226 } else {
227 rates = ~0;
228 rates_len = sband->n_bitrates;
229 }
230
231 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
232 memset(mgmt, 0, 24);
233 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
234 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
235 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
236
237 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
238 skb_put(skb, 10);
239 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
240 IEEE80211_STYPE_REASSOC_REQ);
241 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
242 mgmt->u.reassoc_req.listen_interval =
243 cpu_to_le16(local->hw.conf.listen_interval);
244 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
245 ETH_ALEN);
246 } else {
247 skb_put(skb, 4);
248 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
249 IEEE80211_STYPE_ASSOC_REQ);
250 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
251 mgmt->u.assoc_req.listen_interval =
252 cpu_to_le16(local->hw.conf.listen_interval);
253 }
254
255 /* SSID */
256 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
257 *pos++ = WLAN_EID_SSID;
258 *pos++ = ifmgd->ssid_len;
259 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
260
261 /* add all rates which were marked to be used above */
262 supp_rates_len = rates_len;
263 if (supp_rates_len > 8)
264 supp_rates_len = 8;
265
266 len = sband->n_bitrates;
267 pos = skb_put(skb, supp_rates_len + 2);
268 *pos++ = WLAN_EID_SUPP_RATES;
269 *pos++ = supp_rates_len;
270
271 count = 0;
272 for (i = 0; i < sband->n_bitrates; i++) {
273 if (BIT(i) & rates) {
274 int rate = sband->bitrates[i].bitrate;
275 *pos++ = (u8) (rate / 5);
276 if (++count == 8)
277 break;
278 }
279 }
280
281 if (rates_len > count) {
282 pos = skb_put(skb, rates_len - count + 2);
283 *pos++ = WLAN_EID_EXT_SUPP_RATES;
284 *pos++ = rates_len - count;
285
286 for (i++; i < sband->n_bitrates; i++) {
287 if (BIT(i) & rates) {
288 int rate = sband->bitrates[i].bitrate;
289 *pos++ = (u8) (rate / 5);
290 }
291 }
292 }
293
294 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
295 /* 1. power capabilities */
296 pos = skb_put(skb, 4);
297 *pos++ = WLAN_EID_PWR_CAPABILITY;
298 *pos++ = 2;
299 *pos++ = 0; /* min tx power */
300 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
301
302 /* 2. supported channels */
303 /* TODO: get this in reg domain format */
304 pos = skb_put(skb, 2 * sband->n_channels + 2);
305 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
306 *pos++ = 2 * sband->n_channels;
307 for (i = 0; i < sband->n_channels; i++) {
308 *pos++ = ieee80211_frequency_to_channel(
309 sband->channels[i].center_freq);
310 *pos++ = 1; /* one channel in the subband*/
311 }
312 }
313
314 if (ifmgd->extra_ie) {
315 pos = skb_put(skb, ifmgd->extra_ie_len);
316 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
317 }
318
319 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
320 pos = skb_put(skb, 9);
321 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
322 *pos++ = 7; /* len */
323 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
324 *pos++ = 0x50;
325 *pos++ = 0xf2;
326 *pos++ = 2; /* WME */
327 *pos++ = 0; /* WME info */
328 *pos++ = 1; /* WME ver */
329 *pos++ = 0;
330 }
331
332 /* wmm support is a must to HT */
333 /*
334 * IEEE802.11n does not allow TKIP/WEP as pairwise
335 * ciphers in HT mode. We still associate in non-ht
336 * mode (11a/b/g) if any one of these ciphers is
337 * configured as pairwise.
338 */
339 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
340 sband->ht_cap.ht_supported &&
341 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
342 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
343 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
344 struct ieee80211_ht_info *ht_info =
345 (struct ieee80211_ht_info *)(ht_ie + 2);
346 u16 cap = sband->ht_cap.cap;
347 __le16 tmp;
348 u32 flags = local->hw.conf.channel->flags;
349
350 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
351 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
352 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
353 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
354 cap &= ~IEEE80211_HT_CAP_SGI_40;
355 }
356 break;
357 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
358 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
359 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
360 cap &= ~IEEE80211_HT_CAP_SGI_40;
361 }
362 break;
363 }
364
365 tmp = cpu_to_le16(cap);
366 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
367 *pos++ = WLAN_EID_HT_CAPABILITY;
368 *pos++ = sizeof(struct ieee80211_ht_cap);
369 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
370 memcpy(pos, &tmp, sizeof(u16));
371 pos += sizeof(u16);
372 /* TODO: needs a define here for << 2 */
373 *pos++ = sband->ht_cap.ampdu_factor |
374 (sband->ht_cap.ampdu_density << 2);
375 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
376 }
377
378 kfree(ifmgd->assocreq_ies);
379 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
380 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
381 if (ifmgd->assocreq_ies)
382 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
383
384 ieee80211_tx_skb(sdata, skb, 0);
385 }
386
387
388 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
389 u16 stype, u16 reason)
390 {
391 struct ieee80211_local *local = sdata->local;
392 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
393 struct sk_buff *skb;
394 struct ieee80211_mgmt *mgmt;
395
396 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
397 if (!skb) {
398 printk(KERN_DEBUG "%s: failed to allocate buffer for "
399 "deauth/disassoc frame\n", sdata->dev->name);
400 return;
401 }
402 skb_reserve(skb, local->hw.extra_tx_headroom);
403
404 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
405 memset(mgmt, 0, 24);
406 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
407 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
408 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
409 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
410 skb_put(skb, 2);
411 /* u.deauth.reason_code == u.disassoc.reason_code */
412 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
413
414 if (stype == IEEE80211_STYPE_DEAUTH)
415 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len);
416 else
417 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len);
418 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
419 }
420
421 void ieee80211_send_pspoll(struct ieee80211_local *local,
422 struct ieee80211_sub_if_data *sdata)
423 {
424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
425 struct ieee80211_pspoll *pspoll;
426 struct sk_buff *skb;
427 u16 fc;
428
429 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
430 if (!skb) {
431 printk(KERN_DEBUG "%s: failed to allocate buffer for "
432 "pspoll frame\n", sdata->dev->name);
433 return;
434 }
435 skb_reserve(skb, local->hw.extra_tx_headroom);
436
437 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
438 memset(pspoll, 0, sizeof(*pspoll));
439 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
440 pspoll->frame_control = cpu_to_le16(fc);
441 pspoll->aid = cpu_to_le16(ifmgd->aid);
442
443 /* aid in PS-Poll has its two MSBs each set to 1 */
444 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
445
446 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
447 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
448
449 ieee80211_tx_skb(sdata, skb, 0);
450 }
451
452 void ieee80211_send_nullfunc(struct ieee80211_local *local,
453 struct ieee80211_sub_if_data *sdata,
454 int powersave)
455 {
456 struct sk_buff *skb;
457 struct ieee80211_hdr *nullfunc;
458 __le16 fc;
459
460 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
461 return;
462
463 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
464 if (!skb) {
465 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
466 "frame\n", sdata->dev->name);
467 return;
468 }
469 skb_reserve(skb, local->hw.extra_tx_headroom);
470
471 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
472 memset(nullfunc, 0, 24);
473 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
474 IEEE80211_FCTL_TODS);
475 if (powersave)
476 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
477 nullfunc->frame_control = fc;
478 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
479 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
480 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
481
482 ieee80211_tx_skb(sdata, skb, 0);
483 }
484
485 /* powersave */
486 static void ieee80211_enable_ps(struct ieee80211_local *local,
487 struct ieee80211_sub_if_data *sdata)
488 {
489 struct ieee80211_conf *conf = &local->hw.conf;
490
491 /*
492 * If we are scanning right now then the parameters will
493 * take effect when scan finishes.
494 */
495 if (local->hw_scanning || local->sw_scanning)
496 return;
497
498 if (conf->dynamic_ps_timeout > 0 &&
499 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
500 mod_timer(&local->dynamic_ps_timer, jiffies +
501 msecs_to_jiffies(conf->dynamic_ps_timeout));
502 } else {
503 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
504 ieee80211_send_nullfunc(local, sdata, 1);
505 conf->flags |= IEEE80211_CONF_PS;
506 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
507 }
508 }
509
510 static void ieee80211_change_ps(struct ieee80211_local *local)
511 {
512 struct ieee80211_conf *conf = &local->hw.conf;
513
514 if (local->ps_sdata) {
515 if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED))
516 return;
517
518 ieee80211_enable_ps(local, local->ps_sdata);
519 } else if (conf->flags & IEEE80211_CONF_PS) {
520 conf->flags &= ~IEEE80211_CONF_PS;
521 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
522 del_timer_sync(&local->dynamic_ps_timer);
523 cancel_work_sync(&local->dynamic_ps_enable_work);
524 }
525 }
526
527 /* need to hold RTNL or interface lock */
528 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
529 {
530 struct ieee80211_sub_if_data *sdata, *found = NULL;
531 int count = 0;
532
533 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
534 local->ps_sdata = NULL;
535 return;
536 }
537
538 list_for_each_entry(sdata, &local->interfaces, list) {
539 if (!netif_running(sdata->dev))
540 continue;
541 if (sdata->vif.type != NL80211_IFTYPE_STATION)
542 continue;
543 found = sdata;
544 count++;
545 }
546
547 if (count == 1 && found->u.mgd.powersave) {
548 s32 beaconint_us;
549
550 if (latency < 0)
551 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
552
553 beaconint_us = ieee80211_tu_to_usec(
554 found->vif.bss_conf.beacon_int);
555
556 if (beaconint_us > latency) {
557 local->ps_sdata = NULL;
558 } else {
559 u8 dtimper = found->vif.bss_conf.dtim_period;
560 int maxslp = 1;
561
562 if (dtimper > 1)
563 maxslp = min_t(int, dtimper,
564 latency / beaconint_us);
565
566 local->hw.conf.max_sleep_period = maxslp;
567 local->ps_sdata = found;
568 }
569 } else {
570 local->ps_sdata = NULL;
571 }
572
573 ieee80211_change_ps(local);
574 }
575
576 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
577 {
578 struct ieee80211_local *local =
579 container_of(work, struct ieee80211_local,
580 dynamic_ps_disable_work);
581
582 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
583 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
584 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
585 }
586
587 ieee80211_wake_queues_by_reason(&local->hw,
588 IEEE80211_QUEUE_STOP_REASON_PS);
589 }
590
591 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
592 {
593 struct ieee80211_local *local =
594 container_of(work, struct ieee80211_local,
595 dynamic_ps_enable_work);
596 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
597
598 /* can only happen when PS was just disabled anyway */
599 if (!sdata)
600 return;
601
602 if (local->hw.conf.flags & IEEE80211_CONF_PS)
603 return;
604
605 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
606 ieee80211_send_nullfunc(local, sdata, 1);
607
608 local->hw.conf.flags |= IEEE80211_CONF_PS;
609 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
610 }
611
612 void ieee80211_dynamic_ps_timer(unsigned long data)
613 {
614 struct ieee80211_local *local = (void *) data;
615
616 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
617 }
618
619 /* MLME */
620 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
621 struct ieee80211_if_managed *ifmgd,
622 u8 *wmm_param, size_t wmm_param_len)
623 {
624 struct ieee80211_tx_queue_params params;
625 size_t left;
626 int count;
627 u8 *pos;
628
629 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
630 return;
631
632 if (!wmm_param)
633 return;
634
635 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
636 return;
637 count = wmm_param[6] & 0x0f;
638 if (count == ifmgd->wmm_last_param_set)
639 return;
640 ifmgd->wmm_last_param_set = count;
641
642 pos = wmm_param + 8;
643 left = wmm_param_len - 8;
644
645 memset(&params, 0, sizeof(params));
646
647 local->wmm_acm = 0;
648 for (; left >= 4; left -= 4, pos += 4) {
649 int aci = (pos[0] >> 5) & 0x03;
650 int acm = (pos[0] >> 4) & 0x01;
651 int queue;
652
653 switch (aci) {
654 case 1: /* AC_BK */
655 queue = 3;
656 if (acm)
657 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
658 break;
659 case 2: /* AC_VI */
660 queue = 1;
661 if (acm)
662 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
663 break;
664 case 3: /* AC_VO */
665 queue = 0;
666 if (acm)
667 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
668 break;
669 case 0: /* AC_BE */
670 default:
671 queue = 2;
672 if (acm)
673 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
674 break;
675 }
676
677 params.aifs = pos[0] & 0x0f;
678 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
679 params.cw_min = ecw2cw(pos[1] & 0x0f);
680 params.txop = get_unaligned_le16(pos + 2);
681 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
682 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
683 "cWmin=%d cWmax=%d txop=%d\n",
684 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
685 params.cw_max, params.txop);
686 #endif
687 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
688 printk(KERN_DEBUG "%s: failed to set TX queue "
689 "parameters for queue %d\n", local->mdev->name,
690 queue);
691 }
692 }
693
694 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
695 u16 capab, bool erp_valid, u8 erp)
696 {
697 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
698 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
699 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
700 #endif
701 u32 changed = 0;
702 bool use_protection;
703 bool use_short_preamble;
704 bool use_short_slot;
705
706 if (erp_valid) {
707 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
708 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
709 } else {
710 use_protection = false;
711 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
712 }
713
714 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
715
716 if (use_protection != bss_conf->use_cts_prot) {
717 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
718 if (net_ratelimit()) {
719 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
720 sdata->dev->name,
721 use_protection ? "enabled" : "disabled",
722 ifmgd->bssid);
723 }
724 #endif
725 bss_conf->use_cts_prot = use_protection;
726 changed |= BSS_CHANGED_ERP_CTS_PROT;
727 }
728
729 if (use_short_preamble != bss_conf->use_short_preamble) {
730 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
731 if (net_ratelimit()) {
732 printk(KERN_DEBUG "%s: switched to %s barker preamble"
733 " (BSSID=%pM)\n",
734 sdata->dev->name,
735 use_short_preamble ? "short" : "long",
736 ifmgd->bssid);
737 }
738 #endif
739 bss_conf->use_short_preamble = use_short_preamble;
740 changed |= BSS_CHANGED_ERP_PREAMBLE;
741 }
742
743 if (use_short_slot != bss_conf->use_short_slot) {
744 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
745 if (net_ratelimit()) {
746 printk(KERN_DEBUG "%s: switched to %s slot time"
747 " (BSSID=%pM)\n",
748 sdata->dev->name,
749 use_short_slot ? "short" : "long",
750 ifmgd->bssid);
751 }
752 #endif
753 bss_conf->use_short_slot = use_short_slot;
754 changed |= BSS_CHANGED_ERP_SLOT;
755 }
756
757 return changed;
758 }
759
760 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
761 {
762 union iwreq_data wrqu;
763
764 memset(&wrqu, 0, sizeof(wrqu));
765 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
766 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
767 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
768 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
769 }
770
771 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
772 {
773 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
774 char *buf;
775 size_t len;
776 int i;
777 union iwreq_data wrqu;
778
779 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
780 return;
781
782 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
783 ifmgd->assocresp_ies_len), GFP_KERNEL);
784 if (!buf)
785 return;
786
787 len = sprintf(buf, "ASSOCINFO(");
788 if (ifmgd->assocreq_ies) {
789 len += sprintf(buf + len, "ReqIEs=");
790 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
791 len += sprintf(buf + len, "%02x",
792 ifmgd->assocreq_ies[i]);
793 }
794 }
795 if (ifmgd->assocresp_ies) {
796 if (ifmgd->assocreq_ies)
797 len += sprintf(buf + len, " ");
798 len += sprintf(buf + len, "RespIEs=");
799 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
800 len += sprintf(buf + len, "%02x",
801 ifmgd->assocresp_ies[i]);
802 }
803 }
804 len += sprintf(buf + len, ")");
805
806 if (len > IW_CUSTOM_MAX) {
807 len = sprintf(buf, "ASSOCRESPIE=");
808 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
809 len += sprintf(buf + len, "%02x",
810 ifmgd->assocresp_ies[i]);
811 }
812 }
813
814 if (len <= IW_CUSTOM_MAX) {
815 memset(&wrqu, 0, sizeof(wrqu));
816 wrqu.data.length = len;
817 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
818 }
819
820 kfree(buf);
821 }
822
823
824 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
825 u32 bss_info_changed)
826 {
827 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
828 struct ieee80211_local *local = sdata->local;
829 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
830
831 struct ieee80211_bss *bss;
832
833 bss_info_changed |= BSS_CHANGED_ASSOC;
834 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
835
836 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
837 conf->channel->center_freq,
838 ifmgd->ssid, ifmgd->ssid_len);
839 if (bss) {
840 /* set timing information */
841 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
842 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
843 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
844
845 bss_info_changed |= BSS_CHANGED_BEACON_INT;
846 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
847 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
848
849 cfg80211_hold_bss(&bss->cbss);
850
851 ieee80211_rx_bss_put(local, bss);
852 }
853
854 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
855 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
856 ieee80211_sta_send_associnfo(sdata);
857
858 ifmgd->last_probe = jiffies;
859 ieee80211_led_assoc(local, 1);
860
861 sdata->vif.bss_conf.assoc = 1;
862 /*
863 * For now just always ask the driver to update the basic rateset
864 * when we have associated, we aren't checking whether it actually
865 * changed or not.
866 */
867 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
868 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
869
870 /* will be same as sdata */
871 if (local->ps_sdata) {
872 mutex_lock(&local->iflist_mtx);
873 ieee80211_recalc_ps(local, -1);
874 mutex_unlock(&local->iflist_mtx);
875 }
876
877 netif_tx_start_all_queues(sdata->dev);
878 netif_carrier_on(sdata->dev);
879
880 ieee80211_sta_send_apinfo(sdata);
881 }
882
883 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
884 {
885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
886 struct ieee80211_local *local = sdata->local;
887
888 ifmgd->direct_probe_tries++;
889 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
890 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
891 sdata->dev->name, ifmgd->bssid);
892 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
893 ieee80211_recalc_idle(local);
894 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
895
896 /*
897 * Most likely AP is not in the range so remove the
898 * bss information associated to the AP
899 */
900 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
901 sdata->local->hw.conf.channel->center_freq,
902 ifmgd->ssid, ifmgd->ssid_len);
903
904 /*
905 * We might have a pending scan which had no chance to run yet
906 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
907 * Hence, queue the STAs work again
908 */
909 queue_work(local->hw.workqueue, &ifmgd->work);
910 return;
911 }
912
913 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
914 sdata->dev->name, ifmgd->bssid,
915 ifmgd->direct_probe_tries);
916
917 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
918
919 /* Direct probe is sent to broadcast address as some APs
920 * will not answer to direct packet in unassociated state.
921 */
922 ieee80211_send_probe_req(sdata, NULL,
923 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
924
925 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
926 }
927
928
929 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
930 {
931 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
932 struct ieee80211_local *local = sdata->local;
933 u8 *ies;
934 size_t ies_len;
935
936 ifmgd->auth_tries++;
937 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
938 printk(KERN_DEBUG "%s: authentication with AP %pM"
939 " timed out\n",
940 sdata->dev->name, ifmgd->bssid);
941 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
942 ieee80211_recalc_idle(local);
943 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
944 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
945 sdata->local->hw.conf.channel->center_freq,
946 ifmgd->ssid, ifmgd->ssid_len);
947
948 /*
949 * We might have a pending scan which had no chance to run yet
950 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
951 * Hence, queue the STAs work again
952 */
953 queue_work(local->hw.workqueue, &ifmgd->work);
954 return;
955 }
956
957 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
958 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
959 sdata->dev->name, ifmgd->bssid);
960
961 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
962 ies = ifmgd->sme_auth_ie;
963 ies_len = ifmgd->sme_auth_ie_len;
964 } else {
965 ies = NULL;
966 ies_len = 0;
967 }
968 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
969 ifmgd->bssid, 0);
970 ifmgd->auth_transaction = 2;
971
972 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
973 }
974
975 /*
976 * The disassoc 'reason' argument can be either our own reason
977 * if self disconnected or a reason code from the AP.
978 */
979 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
980 bool deauth, bool self_disconnected,
981 u16 reason)
982 {
983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
984 struct ieee80211_local *local = sdata->local;
985 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
986 struct ieee80211_bss *bss;
987 struct sta_info *sta;
988 u32 changed = 0, config_changed = 0;
989
990 rcu_read_lock();
991
992 sta = sta_info_get(local, ifmgd->bssid);
993 if (!sta) {
994 rcu_read_unlock();
995 return;
996 }
997
998 if (deauth) {
999 ifmgd->direct_probe_tries = 0;
1000 ifmgd->auth_tries = 0;
1001 }
1002 ifmgd->assoc_scan_tries = 0;
1003 ifmgd->assoc_tries = 0;
1004
1005 netif_tx_stop_all_queues(sdata->dev);
1006 netif_carrier_off(sdata->dev);
1007
1008 ieee80211_sta_tear_down_BA_sessions(sta);
1009
1010 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1011 conf->channel->center_freq,
1012 ifmgd->ssid, ifmgd->ssid_len);
1013
1014 if (bss) {
1015 cfg80211_unhold_bss(&bss->cbss);
1016 ieee80211_rx_bss_put(local, bss);
1017 }
1018
1019 if (self_disconnected) {
1020 if (deauth)
1021 ieee80211_send_deauth_disassoc(sdata,
1022 IEEE80211_STYPE_DEAUTH, reason);
1023 else
1024 ieee80211_send_deauth_disassoc(sdata,
1025 IEEE80211_STYPE_DISASSOC, reason);
1026 }
1027
1028 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1029 changed |= ieee80211_reset_erp_info(sdata);
1030
1031 ieee80211_led_assoc(local, 0);
1032 changed |= BSS_CHANGED_ASSOC;
1033 sdata->vif.bss_conf.assoc = false;
1034
1035 ieee80211_sta_send_apinfo(sdata);
1036
1037 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1038 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1039 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1040 sdata->local->hw.conf.channel->center_freq,
1041 ifmgd->ssid, ifmgd->ssid_len);
1042 }
1043
1044 rcu_read_unlock();
1045
1046 ieee80211_recalc_idle(local);
1047
1048 /* channel(_type) changes are handled by ieee80211_hw_config */
1049 local->oper_channel_type = NL80211_CHAN_NO_HT;
1050
1051 local->power_constr_level = 0;
1052
1053 del_timer_sync(&local->dynamic_ps_timer);
1054 cancel_work_sync(&local->dynamic_ps_enable_work);
1055
1056 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1057 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1058 config_changed |= IEEE80211_CONF_CHANGE_PS;
1059 }
1060
1061 ieee80211_hw_config(local, config_changed);
1062 ieee80211_bss_info_change_notify(sdata, changed);
1063
1064 rcu_read_lock();
1065
1066 sta = sta_info_get(local, ifmgd->bssid);
1067 if (!sta) {
1068 rcu_read_unlock();
1069 return;
1070 }
1071
1072 sta_info_unlink(&sta);
1073
1074 rcu_read_unlock();
1075
1076 sta_info_destroy(sta);
1077 }
1078
1079 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1080 {
1081 if (!sdata || !sdata->default_key ||
1082 sdata->default_key->conf.alg != ALG_WEP)
1083 return 0;
1084 return 1;
1085 }
1086
1087 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1088 {
1089 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1090 struct ieee80211_local *local = sdata->local;
1091 struct ieee80211_bss *bss;
1092 int bss_privacy;
1093 int wep_privacy;
1094 int privacy_invoked;
1095
1096 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1097 return 0;
1098
1099 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1100 local->hw.conf.channel->center_freq,
1101 ifmgd->ssid, ifmgd->ssid_len);
1102 if (!bss)
1103 return 0;
1104
1105 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1106 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1107 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1108
1109 ieee80211_rx_bss_put(local, bss);
1110
1111 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1112 return 0;
1113
1114 return 1;
1115 }
1116
1117 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1118 {
1119 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1120 struct ieee80211_local *local = sdata->local;
1121
1122 ifmgd->assoc_tries++;
1123 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1124 printk(KERN_DEBUG "%s: association with AP %pM"
1125 " timed out\n",
1126 sdata->dev->name, ifmgd->bssid);
1127 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1128 ieee80211_recalc_idle(local);
1129 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
1130 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1131 sdata->local->hw.conf.channel->center_freq,
1132 ifmgd->ssid, ifmgd->ssid_len);
1133 /*
1134 * We might have a pending scan which had no chance to run yet
1135 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1136 * Hence, queue the STAs work again
1137 */
1138 queue_work(local->hw.workqueue, &ifmgd->work);
1139 return;
1140 }
1141
1142 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1143 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1144 sdata->dev->name, ifmgd->bssid);
1145 if (ieee80211_privacy_mismatch(sdata)) {
1146 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1147 "mixed-cell disabled - abort association\n", sdata->dev->name);
1148 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1149 ieee80211_recalc_idle(local);
1150 return;
1151 }
1152
1153 ieee80211_send_assoc(sdata);
1154
1155 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1156 }
1157
1158 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1159 struct ieee80211_hdr *hdr)
1160 {
1161 /*
1162 * We can postpone the mgd.timer whenever receiving unicast frames
1163 * from AP because we know that the connection is working both ways
1164 * at that time. But multicast frames (and hence also beacons) must
1165 * be ignored here, because we need to trigger the timer during
1166 * data idle periods for sending the periodical probe request to
1167 * the AP.
1168 */
1169 if (!is_multicast_ether_addr(hdr->addr1))
1170 mod_timer(&sdata->u.mgd.timer,
1171 jiffies + IEEE80211_MONITORING_INTERVAL);
1172 }
1173
1174 void ieee80211_beacon_loss_work(struct work_struct *work)
1175 {
1176 struct ieee80211_sub_if_data *sdata =
1177 container_of(work, struct ieee80211_sub_if_data,
1178 u.mgd.beacon_loss_work);
1179 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1180
1181 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1182 if (net_ratelimit()) {
1183 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1184 "- sending probe request\n", sdata->dev->name,
1185 sdata->u.mgd.bssid);
1186 }
1187 #endif
1188
1189 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1190 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1191 ifmgd->ssid_len, NULL, 0);
1192
1193 mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL);
1194 }
1195
1196 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1197 {
1198 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1199
1200 queue_work(sdata->local->hw.workqueue,
1201 &sdata->u.mgd.beacon_loss_work);
1202 }
1203 EXPORT_SYMBOL(ieee80211_beacon_loss);
1204
1205 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1206 {
1207 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1208 struct ieee80211_local *local = sdata->local;
1209 struct sta_info *sta;
1210 bool disassoc = false;
1211
1212 /* TODO: start monitoring current AP signal quality and number of
1213 * missed beacons. Scan other channels every now and then and search
1214 * for better APs. */
1215 /* TODO: remove expired BSSes */
1216
1217 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1218
1219 rcu_read_lock();
1220
1221 sta = sta_info_get(local, ifmgd->bssid);
1222 if (!sta) {
1223 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1224 sdata->dev->name, ifmgd->bssid);
1225 disassoc = true;
1226 goto unlock;
1227 }
1228
1229 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1230 time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1231 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1232 "- disassociating\n",
1233 sdata->dev->name, ifmgd->bssid);
1234 disassoc = true;
1235 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1236 goto unlock;
1237 }
1238
1239 /*
1240 * Beacon filtering is only enabled with power save and then the
1241 * stack should not check for beacon loss.
1242 */
1243 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1244 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1245 time_after(jiffies,
1246 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1247 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1248 if (net_ratelimit()) {
1249 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1250 "- sending probe request\n",
1251 sdata->dev->name, ifmgd->bssid);
1252 }
1253 #endif
1254 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1255 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1256 ifmgd->ssid_len, NULL, 0);
1257 goto unlock;
1258
1259 }
1260
1261 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1262 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1263 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1264 ifmgd->ssid_len, NULL, 0);
1265 }
1266
1267 unlock:
1268 rcu_read_unlock();
1269
1270 if (disassoc)
1271 ieee80211_set_disassoc(sdata, true, true,
1272 WLAN_REASON_PREV_AUTH_NOT_VALID);
1273 else
1274 mod_timer(&ifmgd->timer, jiffies +
1275 IEEE80211_MONITORING_INTERVAL);
1276 }
1277
1278
1279 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1280 {
1281 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1282
1283 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1284 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1285 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1286 /* Wait for SME to request association */
1287 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1288 ieee80211_recalc_idle(sdata->local);
1289 } else
1290 ieee80211_associate(sdata);
1291 }
1292
1293
1294 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1295 struct ieee80211_mgmt *mgmt,
1296 size_t len)
1297 {
1298 u8 *pos;
1299 struct ieee802_11_elems elems;
1300
1301 pos = mgmt->u.auth.variable;
1302 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1303 if (!elems.challenge)
1304 return;
1305 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1306 elems.challenge - 2, elems.challenge_len + 2,
1307 sdata->u.mgd.bssid, 1);
1308 sdata->u.mgd.auth_transaction = 4;
1309 }
1310
1311 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1312 struct ieee80211_mgmt *mgmt,
1313 size_t len)
1314 {
1315 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1316 u16 auth_alg, auth_transaction, status_code;
1317
1318 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1319 return;
1320
1321 if (len < 24 + 6)
1322 return;
1323
1324 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1325 return;
1326
1327 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1328 return;
1329
1330 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1331 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1332 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1333
1334 if (auth_alg != ifmgd->auth_alg ||
1335 auth_transaction != ifmgd->auth_transaction)
1336 return;
1337
1338 if (status_code != WLAN_STATUS_SUCCESS) {
1339 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1340 u8 algs[3];
1341 const int num_algs = ARRAY_SIZE(algs);
1342 int i, pos;
1343 algs[0] = algs[1] = algs[2] = 0xff;
1344 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1345 algs[0] = WLAN_AUTH_OPEN;
1346 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1347 algs[1] = WLAN_AUTH_SHARED_KEY;
1348 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1349 algs[2] = WLAN_AUTH_LEAP;
1350 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1351 pos = 0;
1352 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1353 pos = 1;
1354 else
1355 pos = 2;
1356 for (i = 0; i < num_algs; i++) {
1357 pos++;
1358 if (pos >= num_algs)
1359 pos = 0;
1360 if (algs[pos] == ifmgd->auth_alg ||
1361 algs[pos] == 0xff)
1362 continue;
1363 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1364 !ieee80211_sta_wep_configured(sdata))
1365 continue;
1366 ifmgd->auth_alg = algs[pos];
1367 break;
1368 }
1369 }
1370 return;
1371 }
1372
1373 switch (ifmgd->auth_alg) {
1374 case WLAN_AUTH_OPEN:
1375 case WLAN_AUTH_LEAP:
1376 case WLAN_AUTH_FT:
1377 ieee80211_auth_completed(sdata);
1378 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1379 break;
1380 case WLAN_AUTH_SHARED_KEY:
1381 if (ifmgd->auth_transaction == 4) {
1382 ieee80211_auth_completed(sdata);
1383 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1384 } else
1385 ieee80211_auth_challenge(sdata, mgmt, len);
1386 break;
1387 }
1388 }
1389
1390
1391 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1392 struct ieee80211_mgmt *mgmt,
1393 size_t len)
1394 {
1395 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1396 u16 reason_code;
1397
1398 if (len < 24 + 2)
1399 return;
1400
1401 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1402 return;
1403
1404 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1405
1406 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1407 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1408 sdata->dev->name, reason_code);
1409
1410 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1411 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1412 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1413 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1414 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1415 mod_timer(&ifmgd->timer, jiffies +
1416 IEEE80211_RETRY_AUTH_INTERVAL);
1417 }
1418
1419 ieee80211_set_disassoc(sdata, true, false, 0);
1420 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1421 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
1422 }
1423
1424
1425 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1426 struct ieee80211_mgmt *mgmt,
1427 size_t len)
1428 {
1429 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1430 u16 reason_code;
1431
1432 if (len < 24 + 2)
1433 return;
1434
1435 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1436 return;
1437
1438 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1439
1440 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1441 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1442 sdata->dev->name, reason_code);
1443
1444 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1445 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1446 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1447 mod_timer(&ifmgd->timer, jiffies +
1448 IEEE80211_RETRY_AUTH_INTERVAL);
1449 }
1450
1451 ieee80211_set_disassoc(sdata, false, false, reason_code);
1452 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
1453 }
1454
1455
1456 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1457 struct ieee80211_mgmt *mgmt,
1458 size_t len,
1459 int reassoc)
1460 {
1461 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1462 struct ieee80211_local *local = sdata->local;
1463 struct ieee80211_supported_band *sband;
1464 struct sta_info *sta;
1465 u32 rates, basic_rates;
1466 u16 capab_info, status_code, aid;
1467 struct ieee802_11_elems elems;
1468 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1469 u8 *pos;
1470 u32 changed = 0;
1471 int i, j;
1472 bool have_higher_than_11mbit = false, newsta = false;
1473 u16 ap_ht_cap_flags;
1474
1475 /* AssocResp and ReassocResp have identical structure, so process both
1476 * of them in this function. */
1477
1478 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1479 return;
1480
1481 if (len < 24 + 6)
1482 return;
1483
1484 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1485 return;
1486
1487 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1488 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1489 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1490
1491 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1492 "status=%d aid=%d)\n",
1493 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1494 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1495
1496 pos = mgmt->u.assoc_resp.variable;
1497 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1498
1499 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1500 elems.timeout_int && elems.timeout_int_len == 5 &&
1501 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1502 u32 tu, ms;
1503 tu = get_unaligned_le32(elems.timeout_int + 1);
1504 ms = tu * 1024 / 1000;
1505 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1506 "comeback duration %u TU (%u ms)\n",
1507 sdata->dev->name, tu, ms);
1508 if (ms > IEEE80211_ASSOC_TIMEOUT)
1509 mod_timer(&ifmgd->timer,
1510 jiffies + msecs_to_jiffies(ms));
1511 return;
1512 }
1513
1514 if (status_code != WLAN_STATUS_SUCCESS) {
1515 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1516 sdata->dev->name, status_code);
1517 /* if this was a reassociation, ensure we try a "full"
1518 * association next time. This works around some broken APs
1519 * which do not correctly reject reassociation requests. */
1520 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1521 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1522 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1523 /* Wait for SME to decide what to do next */
1524 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1525 ieee80211_recalc_idle(local);
1526 }
1527 return;
1528 }
1529
1530 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1531 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1532 "set\n", sdata->dev->name, aid);
1533 aid &= ~(BIT(15) | BIT(14));
1534
1535 if (!elems.supp_rates) {
1536 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1537 sdata->dev->name);
1538 return;
1539 }
1540
1541 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1542 ifmgd->aid = aid;
1543 ifmgd->ap_capab = capab_info;
1544
1545 kfree(ifmgd->assocresp_ies);
1546 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1547 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1548 if (ifmgd->assocresp_ies)
1549 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1550
1551 rcu_read_lock();
1552
1553 /* Add STA entry for the AP */
1554 sta = sta_info_get(local, ifmgd->bssid);
1555 if (!sta) {
1556 newsta = true;
1557
1558 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1559 if (!sta) {
1560 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1561 " the AP\n", sdata->dev->name);
1562 rcu_read_unlock();
1563 return;
1564 }
1565
1566 /* update new sta with its last rx activity */
1567 sta->last_rx = jiffies;
1568 }
1569
1570 /*
1571 * FIXME: Do we really need to update the sta_info's information here?
1572 * We already know about the AP (we found it in our list) so it
1573 * should already be filled with the right info, no?
1574 * As is stands, all this is racy because typically we assume
1575 * the information that is filled in here (except flags) doesn't
1576 * change while a STA structure is alive. As such, it should move
1577 * to between the sta_info_alloc() and sta_info_insert() above.
1578 */
1579
1580 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1581 WLAN_STA_AUTHORIZED);
1582
1583 rates = 0;
1584 basic_rates = 0;
1585 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1586
1587 for (i = 0; i < elems.supp_rates_len; i++) {
1588 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1589 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1590
1591 if (rate > 110)
1592 have_higher_than_11mbit = true;
1593
1594 for (j = 0; j < sband->n_bitrates; j++) {
1595 if (sband->bitrates[j].bitrate == rate) {
1596 rates |= BIT(j);
1597 if (is_basic)
1598 basic_rates |= BIT(j);
1599 break;
1600 }
1601 }
1602 }
1603
1604 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1605 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1606 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1607
1608 if (rate > 110)
1609 have_higher_than_11mbit = true;
1610
1611 for (j = 0; j < sband->n_bitrates; j++) {
1612 if (sband->bitrates[j].bitrate == rate) {
1613 rates |= BIT(j);
1614 if (is_basic)
1615 basic_rates |= BIT(j);
1616 break;
1617 }
1618 }
1619 }
1620
1621 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1622 sdata->vif.bss_conf.basic_rates = basic_rates;
1623
1624 /* cf. IEEE 802.11 9.2.12 */
1625 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1626 have_higher_than_11mbit)
1627 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1628 else
1629 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1630
1631 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1632 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1633 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1634 elems.ht_cap_elem, &sta->sta.ht_cap);
1635
1636 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1637
1638 rate_control_rate_init(sta);
1639
1640 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1641 set_sta_flags(sta, WLAN_STA_MFP);
1642
1643 if (elems.wmm_param)
1644 set_sta_flags(sta, WLAN_STA_WME);
1645
1646 if (newsta) {
1647 int err = sta_info_insert(sta);
1648 if (err) {
1649 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1650 " the AP (error %d)\n", sdata->dev->name, err);
1651 rcu_read_unlock();
1652 return;
1653 }
1654 }
1655
1656 rcu_read_unlock();
1657
1658 if (elems.wmm_param)
1659 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1660 elems.wmm_param_len);
1661
1662 if (elems.ht_info_elem && elems.wmm_param &&
1663 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1664 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1665 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1666 ap_ht_cap_flags);
1667
1668 /* set AID and assoc capability,
1669 * ieee80211_set_associated() will tell the driver */
1670 bss_conf->aid = aid;
1671 bss_conf->assoc_capability = capab_info;
1672 ieee80211_set_associated(sdata, changed);
1673
1674 /*
1675 * initialise the time of last beacon to be the association time,
1676 * otherwise beacon loss check will trigger immediately
1677 */
1678 ifmgd->last_beacon = jiffies;
1679
1680 ieee80211_associated(sdata);
1681 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1682 }
1683
1684
1685 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1686 struct ieee80211_mgmt *mgmt,
1687 size_t len,
1688 struct ieee80211_rx_status *rx_status,
1689 struct ieee802_11_elems *elems,
1690 bool beacon)
1691 {
1692 struct ieee80211_local *local = sdata->local;
1693 int freq;
1694 struct ieee80211_bss *bss;
1695 struct ieee80211_channel *channel;
1696
1697 if (elems->ds_params && elems->ds_params_len == 1)
1698 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1699 else
1700 freq = rx_status->freq;
1701
1702 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1703
1704 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1705 return;
1706
1707 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1708 channel, beacon);
1709 if (!bss)
1710 return;
1711
1712 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1713 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1714 struct ieee80211_channel_sw_ie *sw_elem =
1715 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1716 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1717 }
1718
1719 ieee80211_rx_bss_put(local, bss);
1720 }
1721
1722
1723 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1724 struct ieee80211_mgmt *mgmt,
1725 size_t len,
1726 struct ieee80211_rx_status *rx_status)
1727 {
1728 struct ieee80211_if_managed *ifmgd;
1729 size_t baselen;
1730 struct ieee802_11_elems elems;
1731
1732 ifmgd = &sdata->u.mgd;
1733
1734 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1735 return; /* ignore ProbeResp to foreign address */
1736
1737 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1738 if (baselen > len)
1739 return;
1740
1741 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1742 &elems);
1743
1744 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1745
1746 /* direct probe may be part of the association flow */
1747 if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
1748 printk(KERN_DEBUG "%s direct probe responded\n",
1749 sdata->dev->name);
1750 ieee80211_authenticate(sdata);
1751 }
1752
1753 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1754 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1755 }
1756
1757 /*
1758 * This is the canonical list of information elements we care about,
1759 * the filter code also gives us all changes to the Microsoft OUI
1760 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1761 *
1762 * We implement beacon filtering in software since that means we can
1763 * avoid processing the frame here and in cfg80211, and userspace
1764 * will not be able to tell whether the hardware supports it or not.
1765 *
1766 * XXX: This list needs to be dynamic -- userspace needs to be able to
1767 * add items it requires. It also needs to be able to tell us to
1768 * look out for other vendor IEs.
1769 */
1770 static const u64 care_about_ies =
1771 (1ULL << WLAN_EID_COUNTRY) |
1772 (1ULL << WLAN_EID_ERP_INFO) |
1773 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1774 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1775 (1ULL << WLAN_EID_HT_CAPABILITY) |
1776 (1ULL << WLAN_EID_HT_INFORMATION);
1777
1778 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1779 struct ieee80211_mgmt *mgmt,
1780 size_t len,
1781 struct ieee80211_rx_status *rx_status)
1782 {
1783 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1784 size_t baselen;
1785 struct ieee802_11_elems elems;
1786 struct ieee80211_local *local = sdata->local;
1787 u32 changed = 0;
1788 bool erp_valid, directed_tim = false;
1789 u8 erp_value = 0;
1790 u32 ncrc;
1791
1792 /* Process beacon from the current BSS */
1793 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1794 if (baselen > len)
1795 return;
1796
1797 if (rx_status->freq != local->hw.conf.channel->center_freq)
1798 return;
1799
1800 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1801 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1802 return;
1803
1804 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1805 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1806 len - baselen, &elems,
1807 care_about_ies, ncrc);
1808
1809 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1810 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1811 ifmgd->aid);
1812
1813 ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim));
1814
1815 if (ncrc == ifmgd->beacon_crc)
1816 return;
1817 ifmgd->beacon_crc = ncrc;
1818
1819 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1820
1821 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1822 elems.wmm_param_len);
1823
1824 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1825 if (directed_tim) {
1826 if (local->hw.conf.dynamic_ps_timeout > 0) {
1827 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1828 ieee80211_hw_config(local,
1829 IEEE80211_CONF_CHANGE_PS);
1830 ieee80211_send_nullfunc(local, sdata, 0);
1831 } else {
1832 local->pspolling = true;
1833
1834 /*
1835 * Here is assumed that the driver will be
1836 * able to send ps-poll frame and receive a
1837 * response even though power save mode is
1838 * enabled, but some drivers might require
1839 * to disable power save here. This needs
1840 * to be investigated.
1841 */
1842 ieee80211_send_pspoll(local, sdata);
1843 }
1844 }
1845 }
1846
1847 if (elems.erp_info && elems.erp_info_len >= 1) {
1848 erp_valid = true;
1849 erp_value = elems.erp_info[0];
1850 } else {
1851 erp_valid = false;
1852 }
1853 changed |= ieee80211_handle_bss_capability(sdata,
1854 le16_to_cpu(mgmt->u.beacon.capab_info),
1855 erp_valid, erp_value);
1856
1857
1858 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1859 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1860 struct sta_info *sta;
1861 struct ieee80211_supported_band *sband;
1862 u16 ap_ht_cap_flags;
1863
1864 rcu_read_lock();
1865
1866 sta = sta_info_get(local, ifmgd->bssid);
1867 if (!sta) {
1868 rcu_read_unlock();
1869 return;
1870 }
1871
1872 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1873
1874 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1875 elems.ht_cap_elem, &sta->sta.ht_cap);
1876
1877 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1878
1879 rcu_read_unlock();
1880
1881 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1882 ap_ht_cap_flags);
1883 }
1884
1885 if (elems.country_elem) {
1886 /* Note we are only reviewing this on beacons
1887 * for the BSSID we are associated to */
1888 regulatory_hint_11d(local->hw.wiphy,
1889 elems.country_elem, elems.country_elem_len);
1890
1891 /* TODO: IBSS also needs this */
1892 if (elems.pwr_constr_elem)
1893 ieee80211_handle_pwr_constr(sdata,
1894 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1895 elems.pwr_constr_elem,
1896 elems.pwr_constr_elem_len);
1897 }
1898
1899 ieee80211_bss_info_change_notify(sdata, changed);
1900 }
1901
1902 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1903 struct sk_buff *skb,
1904 struct ieee80211_rx_status *rx_status)
1905 {
1906 struct ieee80211_local *local = sdata->local;
1907 struct ieee80211_mgmt *mgmt;
1908 u16 fc;
1909
1910 if (skb->len < 24)
1911 return RX_DROP_MONITOR;
1912
1913 mgmt = (struct ieee80211_mgmt *) skb->data;
1914 fc = le16_to_cpu(mgmt->frame_control);
1915
1916 switch (fc & IEEE80211_FCTL_STYPE) {
1917 case IEEE80211_STYPE_PROBE_REQ:
1918 case IEEE80211_STYPE_PROBE_RESP:
1919 case IEEE80211_STYPE_BEACON:
1920 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1921 case IEEE80211_STYPE_AUTH:
1922 case IEEE80211_STYPE_ASSOC_RESP:
1923 case IEEE80211_STYPE_REASSOC_RESP:
1924 case IEEE80211_STYPE_DEAUTH:
1925 case IEEE80211_STYPE_DISASSOC:
1926 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1927 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1928 return RX_QUEUED;
1929 }
1930
1931 return RX_DROP_MONITOR;
1932 }
1933
1934 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1935 struct sk_buff *skb)
1936 {
1937 struct ieee80211_rx_status *rx_status;
1938 struct ieee80211_mgmt *mgmt;
1939 u16 fc;
1940
1941 rx_status = (struct ieee80211_rx_status *) skb->cb;
1942 mgmt = (struct ieee80211_mgmt *) skb->data;
1943 fc = le16_to_cpu(mgmt->frame_control);
1944
1945 switch (fc & IEEE80211_FCTL_STYPE) {
1946 case IEEE80211_STYPE_PROBE_RESP:
1947 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1948 rx_status);
1949 break;
1950 case IEEE80211_STYPE_BEACON:
1951 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1952 rx_status);
1953 break;
1954 case IEEE80211_STYPE_AUTH:
1955 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1956 break;
1957 case IEEE80211_STYPE_ASSOC_RESP:
1958 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1959 break;
1960 case IEEE80211_STYPE_REASSOC_RESP:
1961 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1962 break;
1963 case IEEE80211_STYPE_DEAUTH:
1964 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1965 break;
1966 case IEEE80211_STYPE_DISASSOC:
1967 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1968 break;
1969 }
1970
1971 kfree_skb(skb);
1972 }
1973
1974 static void ieee80211_sta_timer(unsigned long data)
1975 {
1976 struct ieee80211_sub_if_data *sdata =
1977 (struct ieee80211_sub_if_data *) data;
1978 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1979 struct ieee80211_local *local = sdata->local;
1980
1981 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1982 queue_work(local->hw.workqueue, &ifmgd->work);
1983 }
1984
1985 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1986 {
1987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1988 struct ieee80211_local *local = sdata->local;
1989
1990 /* Reset own TSF to allow time synchronization work. */
1991 drv_reset_tsf(local);
1992
1993 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1994
1995
1996 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1997 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1998 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1999 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
2000 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2001 ifmgd->auth_alg = WLAN_AUTH_LEAP;
2002 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
2003 ifmgd->auth_alg = WLAN_AUTH_FT;
2004 else
2005 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2006 ifmgd->auth_transaction = -1;
2007 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2008 ifmgd->assoc_scan_tries = 0;
2009 ifmgd->direct_probe_tries = 0;
2010 ifmgd->auth_tries = 0;
2011 ifmgd->assoc_tries = 0;
2012 netif_tx_stop_all_queues(sdata->dev);
2013 netif_carrier_off(sdata->dev);
2014 }
2015
2016 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2017 {
2018 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2019 struct ieee80211_local *local = sdata->local;
2020 struct ieee80211_bss *bss;
2021 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2022 u8 ssid_len = ifmgd->ssid_len;
2023 u16 capa_mask = WLAN_CAPABILITY_ESS;
2024 u16 capa_val = WLAN_CAPABILITY_ESS;
2025 struct ieee80211_channel *chan = local->oper_channel;
2026
2027 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2028 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2029 IEEE80211_STA_AUTO_BSSID_SEL |
2030 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2031 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2032 if (sdata->default_key)
2033 capa_val |= WLAN_CAPABILITY_PRIVACY;
2034 }
2035
2036 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2037 chan = NULL;
2038
2039 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2040 bssid = NULL;
2041
2042 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2043 ssid = NULL;
2044 ssid_len = 0;
2045 }
2046
2047 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2048 bssid, ssid, ssid_len,
2049 capa_mask, capa_val);
2050
2051 if (bss) {
2052 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
2053 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2054 ieee80211_sta_set_ssid(sdata, bss->ssid,
2055 bss->ssid_len);
2056 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2057 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2058 bss->supp_rates);
2059 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2060 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2061 else
2062 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2063
2064 /* Send out direct probe if no probe resp was received or
2065 * the one we have is outdated
2066 */
2067 if (!bss->last_probe_resp ||
2068 time_after(jiffies, bss->last_probe_resp
2069 + IEEE80211_SCAN_RESULT_EXPIRE))
2070 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2071 else
2072 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2073
2074 ieee80211_rx_bss_put(local, bss);
2075 ieee80211_sta_reset_auth(sdata);
2076 return 0;
2077 } else {
2078 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2079 u8 ssid_len = 0;
2080
2081 if (!(ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL))
2082 ssid_len = ifmgd->ssid_len;
2083
2084 ifmgd->assoc_scan_tries++;
2085
2086 ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2087 ssid_len);
2088
2089 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2090 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2091 } else {
2092 ifmgd->assoc_scan_tries = 0;
2093 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2094 ieee80211_recalc_idle(local);
2095 }
2096 }
2097 return -1;
2098 }
2099
2100
2101 static void ieee80211_sta_work(struct work_struct *work)
2102 {
2103 struct ieee80211_sub_if_data *sdata =
2104 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2105 struct ieee80211_local *local = sdata->local;
2106 struct ieee80211_if_managed *ifmgd;
2107 struct sk_buff *skb;
2108
2109 if (!netif_running(sdata->dev))
2110 return;
2111
2112 if (local->sw_scanning || local->hw_scanning)
2113 return;
2114
2115 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2116 return;
2117 ifmgd = &sdata->u.mgd;
2118
2119 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2120 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2121
2122 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2123 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2124 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2125 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2126 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2127 round_jiffies_relative(0));
2128 return;
2129 }
2130
2131 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2132 if (ieee80211_sta_config_auth(sdata))
2133 return;
2134 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2135 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2136 return;
2137
2138 ieee80211_recalc_idle(local);
2139
2140 switch (ifmgd->state) {
2141 case IEEE80211_STA_MLME_DISABLED:
2142 break;
2143 case IEEE80211_STA_MLME_DIRECT_PROBE:
2144 ieee80211_direct_probe(sdata);
2145 break;
2146 case IEEE80211_STA_MLME_AUTHENTICATE:
2147 ieee80211_authenticate(sdata);
2148 break;
2149 case IEEE80211_STA_MLME_ASSOCIATE:
2150 ieee80211_associate(sdata);
2151 break;
2152 case IEEE80211_STA_MLME_ASSOCIATED:
2153 ieee80211_associated(sdata);
2154 break;
2155 default:
2156 WARN_ON(1);
2157 break;
2158 }
2159
2160 if (ieee80211_privacy_mismatch(sdata)) {
2161 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2162 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2163
2164 ieee80211_set_disassoc(sdata, false, true,
2165 WLAN_REASON_UNSPECIFIED);
2166 }
2167 }
2168
2169 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2170 {
2171 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2172 /*
2173 * Need to update last_beacon to avoid beacon loss
2174 * test to trigger.
2175 */
2176 sdata->u.mgd.last_beacon = jiffies;
2177
2178
2179 queue_work(sdata->local->hw.workqueue,
2180 &sdata->u.mgd.work);
2181 }
2182 }
2183
2184 /* interface setup */
2185 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2186 {
2187 struct ieee80211_if_managed *ifmgd;
2188 u32 hw_flags;
2189
2190 ifmgd = &sdata->u.mgd;
2191 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2192 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2193 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2194 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2195 (unsigned long) sdata);
2196 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2197 (unsigned long) sdata);
2198 skb_queue_head_init(&ifmgd->skb_queue);
2199
2200 ifmgd->capab = WLAN_CAPABILITY_ESS;
2201 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2202 IEEE80211_AUTH_ALG_SHARED_KEY;
2203 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
2204 IEEE80211_STA_AUTO_BSSID_SEL |
2205 IEEE80211_STA_AUTO_CHANNEL_SEL;
2206 if (sdata->local->hw.queues >= 4)
2207 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2208
2209 hw_flags = sdata->local->hw.flags;
2210
2211 if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2212 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2213 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2214 }
2215 }
2216
2217 /* configuration hooks */
2218 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2219 {
2220 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2221 struct ieee80211_local *local = sdata->local;
2222
2223 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2224 return;
2225
2226 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
2227 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2228 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
2229 IEEE80211_STA_AUTO_SSID_SEL))) {
2230
2231 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2232 ieee80211_set_disassoc(sdata, true, true,
2233 WLAN_REASON_DEAUTH_LEAVING);
2234
2235 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2236 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2237 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2238 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2239 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2240 queue_work(local->hw.workqueue, &ifmgd->work);
2241 }
2242 }
2243
2244 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2245 {
2246 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2247
2248 if (ifmgd->ssid_len)
2249 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2250 else
2251 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2252
2253 return 0;
2254 }
2255
2256 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2257 {
2258 struct ieee80211_if_managed *ifmgd;
2259
2260 if (len > IEEE80211_MAX_SSID_LEN)
2261 return -EINVAL;
2262
2263 ifmgd = &sdata->u.mgd;
2264
2265 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2266 /*
2267 * Do not use reassociation if SSID is changed (different ESS).
2268 */
2269 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2270 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2271 memcpy(ifmgd->ssid, ssid, len);
2272 ifmgd->ssid_len = len;
2273 }
2274
2275 return ieee80211_sta_commit(sdata);
2276 }
2277
2278 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2279 {
2280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2281 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2282 *len = ifmgd->ssid_len;
2283 return 0;
2284 }
2285
2286 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2287 {
2288 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2289
2290 if (is_valid_ether_addr(bssid)) {
2291 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2292 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2293 } else {
2294 memset(ifmgd->bssid, 0, ETH_ALEN);
2295 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2296 }
2297
2298 if (netif_running(sdata->dev))
2299 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2300
2301 return ieee80211_sta_commit(sdata);
2302 }
2303
2304 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2305 const char *ie, size_t len)
2306 {
2307 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2308
2309 kfree(ifmgd->extra_ie);
2310 if (len == 0) {
2311 ifmgd->extra_ie = NULL;
2312 ifmgd->extra_ie_len = 0;
2313 return 0;
2314 }
2315 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2316 if (!ifmgd->extra_ie) {
2317 ifmgd->extra_ie_len = 0;
2318 return -ENOMEM;
2319 }
2320 memcpy(ifmgd->extra_ie, ie, len);
2321 ifmgd->extra_ie_len = len;
2322 return 0;
2323 }
2324
2325 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2326 {
2327 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2328 sdata->dev->name, reason);
2329
2330 ieee80211_set_disassoc(sdata, true, true, reason);
2331 return 0;
2332 }
2333
2334 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2335 {
2336 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2337
2338 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2339 sdata->dev->name, reason);
2340
2341 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2342 return -ENOLINK;
2343
2344 ieee80211_set_disassoc(sdata, false, true, reason);
2345 return 0;
2346 }
2347
2348 /* scan finished notification */
2349 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2350 {
2351 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2352
2353 /* Restart STA timers */
2354 rcu_read_lock();
2355 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2356 ieee80211_restart_sta_timer(sdata);
2357 rcu_read_unlock();
2358 }
2359
2360 int ieee80211_max_network_latency(struct notifier_block *nb,
2361 unsigned long data, void *dummy)
2362 {
2363 s32 latency_usec = (s32) data;
2364 struct ieee80211_local *local =
2365 container_of(nb, struct ieee80211_local,
2366 network_latency_notifier);
2367
2368 mutex_lock(&local->iflist_mtx);
2369 ieee80211_recalc_ps(local, latency_usec);
2370 mutex_unlock(&local->iflist_mtx);
2371
2372 return 0;
2373 }
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