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mac80211: clean up beacon interval settings
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / mlme.c
blobbfd571e6f2218e448709dd80ef315b9e77fc89d8
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 "rate.h"
27 #include "led.h"
28
29 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
30 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
31 #define IEEE80211_AUTH_MAX_TRIES 3
32 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
33 #define IEEE80211_ASSOC_MAX_TRIES 3
34 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
35 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
36 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
37
38 /* utils */
39 static int ecw2cw(int ecw)
40 {
41 return (1 << ecw) - 1;
42 }
43
44 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
45 {
46 u8 *end, *pos;
47
48 pos = bss->cbss.information_elements;
49 if (pos == NULL)
50 return NULL;
51 end = pos + bss->cbss.len_information_elements;
52
53 while (pos + 1 < end) {
54 if (pos + 2 + pos[1] > end)
55 break;
56 if (pos[0] == ie)
57 return pos;
58 pos += 2 + pos[1];
59 }
60
61 return NULL;
62 }
63
64 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
65 struct ieee80211_supported_band *sband,
66 u32 *rates)
67 {
68 int i, j, count;
69 *rates = 0;
70 count = 0;
71 for (i = 0; i < bss->supp_rates_len; i++) {
72 int rate = (bss->supp_rates[i] & 0x7F) * 5;
73
74 for (j = 0; j < sband->n_bitrates; j++)
75 if (sband->bitrates[j].bitrate == rate) {
76 *rates |= BIT(j);
77 count++;
78 break;
79 }
80 }
81
82 return count;
83 }
84
85 /*
86 * ieee80211_enable_ht should be called only after the operating band
87 * has been determined as ht configuration depends on the hw's
88 * HT abilities for a specific band.
89 */
90 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
91 struct ieee80211_ht_info *hti,
92 u16 ap_ht_cap_flags)
93 {
94 struct ieee80211_local *local = sdata->local;
95 struct ieee80211_supported_band *sband;
96 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
97 struct ieee80211_bss_ht_conf ht;
98 struct sta_info *sta;
99 u32 changed = 0;
100 bool enable_ht = true, ht_changed;
101 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
102
103 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
104
105 memset(&ht, 0, sizeof(ht));
106
107 /* HT is not supported */
108 if (!sband->ht_cap.ht_supported)
109 enable_ht = false;
110
111 /* check that channel matches the right operating channel */
112 if (local->hw.conf.channel->center_freq !=
113 ieee80211_channel_to_frequency(hti->control_chan))
114 enable_ht = false;
115
116 if (enable_ht) {
117 channel_type = NL80211_CHAN_HT20;
118
119 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
120 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
121 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
122 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
123 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
124 channel_type = NL80211_CHAN_HT40PLUS;
125 break;
126 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
127 channel_type = NL80211_CHAN_HT40MINUS;
128 break;
129 }
130 }
131 }
132
133 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
134 channel_type != local->hw.conf.channel_type;
135
136 local->oper_channel_type = channel_type;
137
138 if (ht_changed) {
139 /* channel_type change automatically detected */
140 ieee80211_hw_config(local, 0);
141
142 rcu_read_lock();
143
144 sta = sta_info_get(local, ifmgd->bssid);
145 if (sta)
146 rate_control_rate_update(local, sband, sta,
147 IEEE80211_RC_HT_CHANGED);
148
149 rcu_read_unlock();
150
151 }
152
153 /* disable HT */
154 if (!enable_ht)
155 return 0;
156
157 ht.operation_mode = le16_to_cpu(hti->operation_mode);
158
159 /* if bss configuration changed store the new one */
160 if (memcmp(&sdata->vif.bss_conf.ht, &ht, sizeof(ht))) {
161 changed |= BSS_CHANGED_HT;
162 sdata->vif.bss_conf.ht = ht;
163 }
164
165 return changed;
166 }
167
168 /* frame sending functions */
169
170 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
171 {
172 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
173 struct ieee80211_local *local = sdata->local;
174 struct sk_buff *skb;
175 struct ieee80211_mgmt *mgmt;
176 u8 *pos, *ies, *ht_ie;
177 int i, len, count, rates_len, supp_rates_len;
178 u16 capab;
179 struct ieee80211_bss *bss;
180 int wmm = 0;
181 struct ieee80211_supported_band *sband;
182 u32 rates = 0;
183
184 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
185 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
186 ifmgd->ssid_len);
187 if (!skb) {
188 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
189 "frame\n", sdata->dev->name);
190 return;
191 }
192 skb_reserve(skb, local->hw.extra_tx_headroom);
193
194 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
195
196 capab = ifmgd->capab;
197
198 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
199 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
200 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
201 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
202 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
203 }
204
205 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
206 local->hw.conf.channel->center_freq,
207 ifmgd->ssid, ifmgd->ssid_len);
208 if (bss) {
209 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
210 capab |= WLAN_CAPABILITY_PRIVACY;
211 if (bss->wmm_used)
212 wmm = 1;
213
214 /* get all rates supported by the device and the AP as
215 * some APs don't like getting a superset of their rates
216 * in the association request (e.g. D-Link DAP 1353 in
217 * b-only mode) */
218 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
219
220 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
221 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
222 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
223
224 ieee80211_rx_bss_put(local, bss);
225 } else {
226 rates = ~0;
227 rates_len = sband->n_bitrates;
228 }
229
230 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
231 memset(mgmt, 0, 24);
232 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
233 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
234 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
235
236 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
237 skb_put(skb, 10);
238 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
239 IEEE80211_STYPE_REASSOC_REQ);
240 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
241 mgmt->u.reassoc_req.listen_interval =
242 cpu_to_le16(local->hw.conf.listen_interval);
243 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
244 ETH_ALEN);
245 } else {
246 skb_put(skb, 4);
247 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
248 IEEE80211_STYPE_ASSOC_REQ);
249 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
250 mgmt->u.assoc_req.listen_interval =
251 cpu_to_le16(local->hw.conf.listen_interval);
252 }
253
254 /* SSID */
255 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
256 *pos++ = WLAN_EID_SSID;
257 *pos++ = ifmgd->ssid_len;
258 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
259
260 /* add all rates which were marked to be used above */
261 supp_rates_len = rates_len;
262 if (supp_rates_len > 8)
263 supp_rates_len = 8;
264
265 len = sband->n_bitrates;
266 pos = skb_put(skb, supp_rates_len + 2);
267 *pos++ = WLAN_EID_SUPP_RATES;
268 *pos++ = supp_rates_len;
269
270 count = 0;
271 for (i = 0; i < sband->n_bitrates; i++) {
272 if (BIT(i) & rates) {
273 int rate = sband->bitrates[i].bitrate;
274 *pos++ = (u8) (rate / 5);
275 if (++count == 8)
276 break;
277 }
278 }
279
280 if (rates_len > count) {
281 pos = skb_put(skb, rates_len - count + 2);
282 *pos++ = WLAN_EID_EXT_SUPP_RATES;
283 *pos++ = rates_len - count;
284
285 for (i++; i < sband->n_bitrates; i++) {
286 if (BIT(i) & rates) {
287 int rate = sband->bitrates[i].bitrate;
288 *pos++ = (u8) (rate / 5);
289 }
290 }
291 }
292
293 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
294 /* 1. power capabilities */
295 pos = skb_put(skb, 4);
296 *pos++ = WLAN_EID_PWR_CAPABILITY;
297 *pos++ = 2;
298 *pos++ = 0; /* min tx power */
299 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
300
301 /* 2. supported channels */
302 /* TODO: get this in reg domain format */
303 pos = skb_put(skb, 2 * sband->n_channels + 2);
304 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
305 *pos++ = 2 * sband->n_channels;
306 for (i = 0; i < sband->n_channels; i++) {
307 *pos++ = ieee80211_frequency_to_channel(
308 sband->channels[i].center_freq);
309 *pos++ = 1; /* one channel in the subband*/
310 }
311 }
312
313 if (ifmgd->extra_ie) {
314 pos = skb_put(skb, ifmgd->extra_ie_len);
315 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
316 }
317
318 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
319 pos = skb_put(skb, 9);
320 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
321 *pos++ = 7; /* len */
322 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
323 *pos++ = 0x50;
324 *pos++ = 0xf2;
325 *pos++ = 2; /* WME */
326 *pos++ = 0; /* WME info */
327 *pos++ = 1; /* WME ver */
328 *pos++ = 0;
329 }
330
331 /* wmm support is a must to HT */
332 /*
333 * IEEE802.11n does not allow TKIP/WEP as pairwise
334 * ciphers in HT mode. We still associate in non-ht
335 * mode (11a/b/g) if any one of these ciphers is
336 * configured as pairwise.
337 */
338 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
339 sband->ht_cap.ht_supported &&
340 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
341 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
342 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
343 struct ieee80211_ht_info *ht_info =
344 (struct ieee80211_ht_info *)(ht_ie + 2);
345 u16 cap = sband->ht_cap.cap;
346 __le16 tmp;
347 u32 flags = local->hw.conf.channel->flags;
348
349 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
350 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
351 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
352 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
353 cap &= ~IEEE80211_HT_CAP_SGI_40;
354 }
355 break;
356 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
357 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
358 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
359 cap &= ~IEEE80211_HT_CAP_SGI_40;
360 }
361 break;
362 }
363
364 tmp = cpu_to_le16(cap);
365 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
366 *pos++ = WLAN_EID_HT_CAPABILITY;
367 *pos++ = sizeof(struct ieee80211_ht_cap);
368 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
369 memcpy(pos, &tmp, sizeof(u16));
370 pos += sizeof(u16);
371 /* TODO: needs a define here for << 2 */
372 *pos++ = sband->ht_cap.ampdu_factor |
373 (sband->ht_cap.ampdu_density << 2);
374 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
375 }
376
377 kfree(ifmgd->assocreq_ies);
378 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
379 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
380 if (ifmgd->assocreq_ies)
381 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
382
383 ieee80211_tx_skb(sdata, skb, 0);
384 }
385
386
387 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
388 u16 stype, u16 reason)
389 {
390 struct ieee80211_local *local = sdata->local;
391 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
392 struct sk_buff *skb;
393 struct ieee80211_mgmt *mgmt;
394
395 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
396 if (!skb) {
397 printk(KERN_DEBUG "%s: failed to allocate buffer for "
398 "deauth/disassoc frame\n", sdata->dev->name);
399 return;
400 }
401 skb_reserve(skb, local->hw.extra_tx_headroom);
402
403 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
404 memset(mgmt, 0, 24);
405 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
406 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
407 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
408 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
409 skb_put(skb, 2);
410 /* u.deauth.reason_code == u.disassoc.reason_code */
411 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
412
413 if (stype == IEEE80211_STYPE_DEAUTH)
414 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len);
415 else
416 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len);
417 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
418 }
419
420 void ieee80211_send_pspoll(struct ieee80211_local *local,
421 struct ieee80211_sub_if_data *sdata)
422 {
423 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
424 struct ieee80211_pspoll *pspoll;
425 struct sk_buff *skb;
426 u16 fc;
427
428 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
429 if (!skb) {
430 printk(KERN_DEBUG "%s: failed to allocate buffer for "
431 "pspoll frame\n", sdata->dev->name);
432 return;
433 }
434 skb_reserve(skb, local->hw.extra_tx_headroom);
435
436 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
437 memset(pspoll, 0, sizeof(*pspoll));
438 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
439 pspoll->frame_control = cpu_to_le16(fc);
440 pspoll->aid = cpu_to_le16(ifmgd->aid);
441
442 /* aid in PS-Poll has its two MSBs each set to 1 */
443 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
444
445 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
446 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
447
448 ieee80211_tx_skb(sdata, skb, 0);
449 }
450
451 void ieee80211_send_nullfunc(struct ieee80211_local *local,
452 struct ieee80211_sub_if_data *sdata,
453 int powersave)
454 {
455 struct sk_buff *skb;
456 struct ieee80211_hdr *nullfunc;
457 __le16 fc;
458
459 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
460 return;
461
462 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
463 if (!skb) {
464 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
465 "frame\n", sdata->dev->name);
466 return;
467 }
468 skb_reserve(skb, local->hw.extra_tx_headroom);
469
470 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
471 memset(nullfunc, 0, 24);
472 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
473 IEEE80211_FCTL_TODS);
474 if (powersave)
475 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
476 nullfunc->frame_control = fc;
477 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
478 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
479 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
480
481 ieee80211_tx_skb(sdata, skb, 0);
482 }
483
484 /* powersave */
485 static void ieee80211_enable_ps(struct ieee80211_local *local,
486 struct ieee80211_sub_if_data *sdata)
487 {
488 struct ieee80211_conf *conf = &local->hw.conf;
489
490 /*
491 * If we are scanning right now then the parameters will
492 * take effect when scan finishes.
493 */
494 if (local->hw_scanning || local->sw_scanning)
495 return;
496
497 if (conf->dynamic_ps_timeout > 0 &&
498 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
499 mod_timer(&local->dynamic_ps_timer, jiffies +
500 msecs_to_jiffies(conf->dynamic_ps_timeout));
501 } else {
502 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
503 ieee80211_send_nullfunc(local, sdata, 1);
504 conf->flags |= IEEE80211_CONF_PS;
505 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
506 }
507 }
508
509 static void ieee80211_change_ps(struct ieee80211_local *local)
510 {
511 struct ieee80211_conf *conf = &local->hw.conf;
512
513 if (local->ps_sdata) {
514 if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED))
515 return;
516
517 ieee80211_enable_ps(local, local->ps_sdata);
518 } else if (conf->flags & IEEE80211_CONF_PS) {
519 conf->flags &= ~IEEE80211_CONF_PS;
520 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
521 del_timer_sync(&local->dynamic_ps_timer);
522 cancel_work_sync(&local->dynamic_ps_enable_work);
523 }
524 }
525
526 /* need to hold RTNL or interface lock */
527 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
528 {
529 struct ieee80211_sub_if_data *sdata, *found = NULL;
530 int count = 0;
531
532 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
533 local->ps_sdata = NULL;
534 return;
535 }
536
537 list_for_each_entry(sdata, &local->interfaces, list) {
538 if (!netif_running(sdata->dev))
539 continue;
540 if (sdata->vif.type != NL80211_IFTYPE_STATION)
541 continue;
542 found = sdata;
543 count++;
544 }
545
546 if (count == 1 && found->u.mgd.powersave) {
547 s32 beaconint_us;
548
549 if (latency < 0)
550 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
551
552 beaconint_us = ieee80211_tu_to_usec(
553 found->vif.bss_conf.beacon_int);
554
555 if (beaconint_us > latency) {
556 local->ps_sdata = NULL;
557 } else {
558 u8 dtimper = found->vif.bss_conf.dtim_period;
559 int maxslp = 1;
560
561 if (dtimper > 1)
562 maxslp = min_t(int, dtimper,
563 latency / beaconint_us);
564
565 local->hw.conf.max_sleep_period = maxslp;
566 local->ps_sdata = found;
567 }
568 } else {
569 local->ps_sdata = NULL;
570 }
571
572 ieee80211_change_ps(local);
573 }
574
575 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
576 {
577 struct ieee80211_local *local =
578 container_of(work, struct ieee80211_local,
579 dynamic_ps_disable_work);
580
581 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
582 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
583 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
584 }
585
586 ieee80211_wake_queues_by_reason(&local->hw,
587 IEEE80211_QUEUE_STOP_REASON_PS);
588 }
589
590 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
591 {
592 struct ieee80211_local *local =
593 container_of(work, struct ieee80211_local,
594 dynamic_ps_enable_work);
595 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
596
597 /* can only happen when PS was just disabled anyway */
598 if (!sdata)
599 return;
600
601 if (local->hw.conf.flags & IEEE80211_CONF_PS)
602 return;
603
604 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
605 ieee80211_send_nullfunc(local, sdata, 1);
606
607 local->hw.conf.flags |= IEEE80211_CONF_PS;
608 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
609 }
610
611 void ieee80211_dynamic_ps_timer(unsigned long data)
612 {
613 struct ieee80211_local *local = (void *) data;
614
615 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
616 }
617
618 /* MLME */
619 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
620 struct ieee80211_if_managed *ifmgd,
621 u8 *wmm_param, size_t wmm_param_len)
622 {
623 struct ieee80211_tx_queue_params params;
624 size_t left;
625 int count;
626 u8 *pos;
627
628 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
629 return;
630
631 if (!wmm_param)
632 return;
633
634 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
635 return;
636 count = wmm_param[6] & 0x0f;
637 if (count == ifmgd->wmm_last_param_set)
638 return;
639 ifmgd->wmm_last_param_set = count;
640
641 pos = wmm_param + 8;
642 left = wmm_param_len - 8;
643
644 memset(&params, 0, sizeof(params));
645
646 local->wmm_acm = 0;
647 for (; left >= 4; left -= 4, pos += 4) {
648 int aci = (pos[0] >> 5) & 0x03;
649 int acm = (pos[0] >> 4) & 0x01;
650 int queue;
651
652 switch (aci) {
653 case 1: /* AC_BK */
654 queue = 3;
655 if (acm)
656 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
657 break;
658 case 2: /* AC_VI */
659 queue = 1;
660 if (acm)
661 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
662 break;
663 case 3: /* AC_VO */
664 queue = 0;
665 if (acm)
666 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
667 break;
668 case 0: /* AC_BE */
669 default:
670 queue = 2;
671 if (acm)
672 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
673 break;
674 }
675
676 params.aifs = pos[0] & 0x0f;
677 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
678 params.cw_min = ecw2cw(pos[1] & 0x0f);
679 params.txop = get_unaligned_le16(pos + 2);
680 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
681 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
682 "cWmin=%d cWmax=%d txop=%d\n",
683 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
684 params.cw_max, params.txop);
685 #endif
686 if (local->ops->conf_tx &&
687 local->ops->conf_tx(local_to_hw(local), queue, &params)) {
688 printk(KERN_DEBUG "%s: failed to set TX queue "
689 "parameters for queue %d\n", local->mdev->name, queue);
690 }
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_sta_send_apinfo(sdata);
894
895 /*
896 * Most likely AP is not in the range so remove the
897 * bss information associated to the AP
898 */
899 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
900 sdata->local->hw.conf.channel->center_freq,
901 ifmgd->ssid, ifmgd->ssid_len);
902
903 /*
904 * We might have a pending scan which had no chance to run yet
905 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
906 * Hence, queue the STAs work again
907 */
908 queue_work(local->hw.workqueue, &ifmgd->work);
909 return;
910 }
911
912 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
913 sdata->dev->name, ifmgd->bssid,
914 ifmgd->direct_probe_tries);
915
916 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
917
918 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
919
920 /* Direct probe is sent to broadcast address as some APs
921 * will not answer to direct packet in unassociated state.
922 */
923 ieee80211_send_probe_req(sdata, NULL,
924 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
925
926 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
927 }
928
929
930 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
931 {
932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
933 struct ieee80211_local *local = sdata->local;
934 u8 *ies;
935 size_t ies_len;
936
937 ifmgd->auth_tries++;
938 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
939 printk(KERN_DEBUG "%s: authentication with AP %pM"
940 " timed out\n",
941 sdata->dev->name, ifmgd->bssid);
942 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
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 /* channel(_type) changes are handled by ieee80211_hw_config */
1047 local->oper_channel_type = NL80211_CHAN_NO_HT;
1048
1049 local->power_constr_level = 0;
1050
1051 del_timer_sync(&local->dynamic_ps_timer);
1052 cancel_work_sync(&local->dynamic_ps_enable_work);
1053
1054 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1055 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1056 config_changed |= IEEE80211_CONF_CHANGE_PS;
1057 }
1058
1059 ieee80211_hw_config(local, config_changed);
1060 ieee80211_bss_info_change_notify(sdata, changed);
1061
1062 rcu_read_lock();
1063
1064 sta = sta_info_get(local, ifmgd->bssid);
1065 if (!sta) {
1066 rcu_read_unlock();
1067 return;
1068 }
1069
1070 sta_info_unlink(&sta);
1071
1072 rcu_read_unlock();
1073
1074 sta_info_destroy(sta);
1075 }
1076
1077 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1078 {
1079 if (!sdata || !sdata->default_key ||
1080 sdata->default_key->conf.alg != ALG_WEP)
1081 return 0;
1082 return 1;
1083 }
1084
1085 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1086 {
1087 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1088 struct ieee80211_local *local = sdata->local;
1089 struct ieee80211_bss *bss;
1090 int bss_privacy;
1091 int wep_privacy;
1092 int privacy_invoked;
1093
1094 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1095 return 0;
1096
1097 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1098 local->hw.conf.channel->center_freq,
1099 ifmgd->ssid, ifmgd->ssid_len);
1100 if (!bss)
1101 return 0;
1102
1103 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1104 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1105 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1106
1107 ieee80211_rx_bss_put(local, bss);
1108
1109 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1110 return 0;
1111
1112 return 1;
1113 }
1114
1115 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1116 {
1117 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1118 struct ieee80211_local *local = sdata->local;
1119
1120 ifmgd->assoc_tries++;
1121 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1122 printk(KERN_DEBUG "%s: association with AP %pM"
1123 " timed out\n",
1124 sdata->dev->name, ifmgd->bssid);
1125 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1126 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
1127 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1128 sdata->local->hw.conf.channel->center_freq,
1129 ifmgd->ssid, ifmgd->ssid_len);
1130 /*
1131 * We might have a pending scan which had no chance to run yet
1132 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1133 * Hence, queue the STAs work again
1134 */
1135 queue_work(local->hw.workqueue, &ifmgd->work);
1136 return;
1137 }
1138
1139 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1140 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1141 sdata->dev->name, ifmgd->bssid);
1142 if (ieee80211_privacy_mismatch(sdata)) {
1143 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1144 "mixed-cell disabled - abort association\n", sdata->dev->name);
1145 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1146 return;
1147 }
1148
1149 ieee80211_send_assoc(sdata);
1150
1151 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1152 }
1153
1154 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1155 struct ieee80211_hdr *hdr)
1156 {
1157 /*
1158 * We can postpone the mgd.timer whenever receiving unicast frames
1159 * from AP because we know that the connection is working both ways
1160 * at that time. But multicast frames (and hence also beacons) must
1161 * be ignored here, because we need to trigger the timer during
1162 * data idle periods for sending the periodical probe request to
1163 * the AP.
1164 */
1165 if (!is_multicast_ether_addr(hdr->addr1))
1166 mod_timer(&sdata->u.mgd.timer,
1167 jiffies + IEEE80211_MONITORING_INTERVAL);
1168 }
1169
1170 void ieee80211_beacon_loss_work(struct work_struct *work)
1171 {
1172 struct ieee80211_sub_if_data *sdata =
1173 container_of(work, struct ieee80211_sub_if_data,
1174 u.mgd.beacon_loss_work);
1175 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1176
1177 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1178 if (net_ratelimit()) {
1179 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1180 "- sending probe request\n", sdata->dev->name,
1181 sdata->u.mgd.bssid);
1182 }
1183 #endif
1184
1185 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1186 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1187 ifmgd->ssid_len, NULL, 0);
1188
1189 mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL);
1190 }
1191
1192 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1193 {
1194 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1195
1196 queue_work(sdata->local->hw.workqueue,
1197 &sdata->u.mgd.beacon_loss_work);
1198 }
1199 EXPORT_SYMBOL(ieee80211_beacon_loss);
1200
1201 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1202 {
1203 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1204 struct ieee80211_local *local = sdata->local;
1205 struct sta_info *sta;
1206 bool disassoc = false;
1207
1208 /* TODO: start monitoring current AP signal quality and number of
1209 * missed beacons. Scan other channels every now and then and search
1210 * for better APs. */
1211 /* TODO: remove expired BSSes */
1212
1213 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1214
1215 rcu_read_lock();
1216
1217 sta = sta_info_get(local, ifmgd->bssid);
1218 if (!sta) {
1219 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1220 sdata->dev->name, ifmgd->bssid);
1221 disassoc = true;
1222 goto unlock;
1223 }
1224
1225 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1226 time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1227 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1228 "- disassociating\n",
1229 sdata->dev->name, ifmgd->bssid);
1230 disassoc = true;
1231 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1232 goto unlock;
1233 }
1234
1235 /*
1236 * Beacon filtering is only enabled with power save and then the
1237 * stack should not check for beacon loss.
1238 */
1239 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1240 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1241 time_after(jiffies,
1242 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1243 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1244 if (net_ratelimit()) {
1245 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1246 "- sending probe request\n",
1247 sdata->dev->name, ifmgd->bssid);
1248 }
1249 #endif
1250 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1251 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1252 ifmgd->ssid_len, NULL, 0);
1253 goto unlock;
1254
1255 }
1256
1257 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1258 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1259 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1260 ifmgd->ssid_len, NULL, 0);
1261 }
1262
1263 unlock:
1264 rcu_read_unlock();
1265
1266 if (disassoc)
1267 ieee80211_set_disassoc(sdata, true, true,
1268 WLAN_REASON_PREV_AUTH_NOT_VALID);
1269 else
1270 mod_timer(&ifmgd->timer, jiffies +
1271 IEEE80211_MONITORING_INTERVAL);
1272 }
1273
1274
1275 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1276 {
1277 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1278
1279 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1280 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1281 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1282 /* Wait for SME to request association */
1283 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1284 } else
1285 ieee80211_associate(sdata);
1286 }
1287
1288
1289 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1290 struct ieee80211_mgmt *mgmt,
1291 size_t len)
1292 {
1293 u8 *pos;
1294 struct ieee802_11_elems elems;
1295
1296 pos = mgmt->u.auth.variable;
1297 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1298 if (!elems.challenge)
1299 return;
1300 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1301 elems.challenge - 2, elems.challenge_len + 2,
1302 sdata->u.mgd.bssid, 1);
1303 sdata->u.mgd.auth_transaction = 4;
1304 }
1305
1306 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1307 struct ieee80211_mgmt *mgmt,
1308 size_t len)
1309 {
1310 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1311 u16 auth_alg, auth_transaction, status_code;
1312
1313 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1314 return;
1315
1316 if (len < 24 + 6)
1317 return;
1318
1319 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1320 return;
1321
1322 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1323 return;
1324
1325 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1326 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1327 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1328
1329 if (auth_alg != ifmgd->auth_alg ||
1330 auth_transaction != ifmgd->auth_transaction)
1331 return;
1332
1333 if (status_code != WLAN_STATUS_SUCCESS) {
1334 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1335 u8 algs[3];
1336 const int num_algs = ARRAY_SIZE(algs);
1337 int i, pos;
1338 algs[0] = algs[1] = algs[2] = 0xff;
1339 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1340 algs[0] = WLAN_AUTH_OPEN;
1341 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1342 algs[1] = WLAN_AUTH_SHARED_KEY;
1343 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1344 algs[2] = WLAN_AUTH_LEAP;
1345 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1346 pos = 0;
1347 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1348 pos = 1;
1349 else
1350 pos = 2;
1351 for (i = 0; i < num_algs; i++) {
1352 pos++;
1353 if (pos >= num_algs)
1354 pos = 0;
1355 if (algs[pos] == ifmgd->auth_alg ||
1356 algs[pos] == 0xff)
1357 continue;
1358 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1359 !ieee80211_sta_wep_configured(sdata))
1360 continue;
1361 ifmgd->auth_alg = algs[pos];
1362 break;
1363 }
1364 }
1365 return;
1366 }
1367
1368 switch (ifmgd->auth_alg) {
1369 case WLAN_AUTH_OPEN:
1370 case WLAN_AUTH_LEAP:
1371 case WLAN_AUTH_FT:
1372 ieee80211_auth_completed(sdata);
1373 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1374 break;
1375 case WLAN_AUTH_SHARED_KEY:
1376 if (ifmgd->auth_transaction == 4) {
1377 ieee80211_auth_completed(sdata);
1378 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1379 } else
1380 ieee80211_auth_challenge(sdata, mgmt, len);
1381 break;
1382 }
1383 }
1384
1385
1386 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1387 struct ieee80211_mgmt *mgmt,
1388 size_t len)
1389 {
1390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1391 u16 reason_code;
1392
1393 if (len < 24 + 2)
1394 return;
1395
1396 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1397 return;
1398
1399 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1400
1401 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1402 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1403 sdata->dev->name, reason_code);
1404
1405 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1406 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1407 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1408 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1409 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1410 mod_timer(&ifmgd->timer, jiffies +
1411 IEEE80211_RETRY_AUTH_INTERVAL);
1412 }
1413
1414 ieee80211_set_disassoc(sdata, true, false, 0);
1415 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1416 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
1417 }
1418
1419
1420 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1421 struct ieee80211_mgmt *mgmt,
1422 size_t len)
1423 {
1424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1425 u16 reason_code;
1426
1427 if (len < 24 + 2)
1428 return;
1429
1430 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1431 return;
1432
1433 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1434
1435 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1436 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1437 sdata->dev->name, reason_code);
1438
1439 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1440 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1441 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1442 mod_timer(&ifmgd->timer, jiffies +
1443 IEEE80211_RETRY_AUTH_INTERVAL);
1444 }
1445
1446 ieee80211_set_disassoc(sdata, false, false, reason_code);
1447 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
1448 }
1449
1450
1451 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1452 struct ieee80211_mgmt *mgmt,
1453 size_t len,
1454 int reassoc)
1455 {
1456 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1457 struct ieee80211_local *local = sdata->local;
1458 struct ieee80211_supported_band *sband;
1459 struct sta_info *sta;
1460 u32 rates, basic_rates;
1461 u16 capab_info, status_code, aid;
1462 struct ieee802_11_elems elems;
1463 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1464 u8 *pos;
1465 u32 changed = 0;
1466 int i, j;
1467 bool have_higher_than_11mbit = false, newsta = false;
1468 u16 ap_ht_cap_flags;
1469
1470 /* AssocResp and ReassocResp have identical structure, so process both
1471 * of them in this function. */
1472
1473 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1474 return;
1475
1476 if (len < 24 + 6)
1477 return;
1478
1479 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1480 return;
1481
1482 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1483 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1484 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1485
1486 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1487 "status=%d aid=%d)\n",
1488 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1489 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1490
1491 pos = mgmt->u.assoc_resp.variable;
1492 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1493
1494 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1495 elems.timeout_int && elems.timeout_int_len == 5 &&
1496 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1497 u32 tu, ms;
1498 tu = get_unaligned_le32(elems.timeout_int + 1);
1499 ms = tu * 1024 / 1000;
1500 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1501 "comeback duration %u TU (%u ms)\n",
1502 sdata->dev->name, tu, ms);
1503 if (ms > IEEE80211_ASSOC_TIMEOUT)
1504 mod_timer(&ifmgd->timer,
1505 jiffies + msecs_to_jiffies(ms));
1506 return;
1507 }
1508
1509 if (status_code != WLAN_STATUS_SUCCESS) {
1510 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1511 sdata->dev->name, status_code);
1512 /* if this was a reassociation, ensure we try a "full"
1513 * association next time. This works around some broken APs
1514 * which do not correctly reject reassociation requests. */
1515 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1516 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1517 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1518 /* Wait for SME to decide what to do next */
1519 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1520 }
1521 return;
1522 }
1523
1524 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1525 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1526 "set\n", sdata->dev->name, aid);
1527 aid &= ~(BIT(15) | BIT(14));
1528
1529 if (!elems.supp_rates) {
1530 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1531 sdata->dev->name);
1532 return;
1533 }
1534
1535 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1536 ifmgd->aid = aid;
1537 ifmgd->ap_capab = capab_info;
1538
1539 kfree(ifmgd->assocresp_ies);
1540 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1541 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1542 if (ifmgd->assocresp_ies)
1543 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1544
1545 rcu_read_lock();
1546
1547 /* Add STA entry for the AP */
1548 sta = sta_info_get(local, ifmgd->bssid);
1549 if (!sta) {
1550 newsta = true;
1551
1552 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1553 if (!sta) {
1554 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1555 " the AP\n", sdata->dev->name);
1556 rcu_read_unlock();
1557 return;
1558 }
1559
1560 /* update new sta with its last rx activity */
1561 sta->last_rx = jiffies;
1562 }
1563
1564 /*
1565 * FIXME: Do we really need to update the sta_info's information here?
1566 * We already know about the AP (we found it in our list) so it
1567 * should already be filled with the right info, no?
1568 * As is stands, all this is racy because typically we assume
1569 * the information that is filled in here (except flags) doesn't
1570 * change while a STA structure is alive. As such, it should move
1571 * to between the sta_info_alloc() and sta_info_insert() above.
1572 */
1573
1574 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1575 WLAN_STA_AUTHORIZED);
1576
1577 rates = 0;
1578 basic_rates = 0;
1579 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1580
1581 for (i = 0; i < elems.supp_rates_len; i++) {
1582 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1583 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1584
1585 if (rate > 110)
1586 have_higher_than_11mbit = true;
1587
1588 for (j = 0; j < sband->n_bitrates; j++) {
1589 if (sband->bitrates[j].bitrate == rate) {
1590 rates |= BIT(j);
1591 if (is_basic)
1592 basic_rates |= BIT(j);
1593 break;
1594 }
1595 }
1596 }
1597
1598 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1599 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1600 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1601
1602 if (rate > 110)
1603 have_higher_than_11mbit = true;
1604
1605 for (j = 0; j < sband->n_bitrates; j++) {
1606 if (sband->bitrates[j].bitrate == rate) {
1607 rates |= BIT(j);
1608 if (is_basic)
1609 basic_rates |= BIT(j);
1610 break;
1611 }
1612 }
1613 }
1614
1615 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1616 sdata->vif.bss_conf.basic_rates = basic_rates;
1617
1618 /* cf. IEEE 802.11 9.2.12 */
1619 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1620 have_higher_than_11mbit)
1621 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1622 else
1623 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1624
1625 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1626 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1627 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1628 elems.ht_cap_elem, &sta->sta.ht_cap);
1629
1630 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1631
1632 rate_control_rate_init(sta);
1633
1634 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1635 set_sta_flags(sta, WLAN_STA_MFP);
1636
1637 if (elems.wmm_param)
1638 set_sta_flags(sta, WLAN_STA_WME);
1639
1640 if (newsta) {
1641 int err = sta_info_insert(sta);
1642 if (err) {
1643 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1644 " the AP (error %d)\n", sdata->dev->name, err);
1645 rcu_read_unlock();
1646 return;
1647 }
1648 }
1649
1650 rcu_read_unlock();
1651
1652 if (elems.wmm_param)
1653 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1654 elems.wmm_param_len);
1655
1656 if (elems.ht_info_elem && elems.wmm_param &&
1657 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1658 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1659 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1660 ap_ht_cap_flags);
1661
1662 /* set AID and assoc capability,
1663 * ieee80211_set_associated() will tell the driver */
1664 bss_conf->aid = aid;
1665 bss_conf->assoc_capability = capab_info;
1666 ieee80211_set_associated(sdata, changed);
1667
1668 /*
1669 * initialise the time of last beacon to be the association time,
1670 * otherwise beacon loss check will trigger immediately
1671 */
1672 ifmgd->last_beacon = jiffies;
1673
1674 ieee80211_associated(sdata);
1675 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1676 }
1677
1678
1679 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1680 struct ieee80211_mgmt *mgmt,
1681 size_t len,
1682 struct ieee80211_rx_status *rx_status,
1683 struct ieee802_11_elems *elems,
1684 bool beacon)
1685 {
1686 struct ieee80211_local *local = sdata->local;
1687 int freq;
1688 struct ieee80211_bss *bss;
1689 struct ieee80211_channel *channel;
1690
1691 if (elems->ds_params && elems->ds_params_len == 1)
1692 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1693 else
1694 freq = rx_status->freq;
1695
1696 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1697
1698 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1699 return;
1700
1701 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1702 channel, beacon);
1703 if (!bss)
1704 return;
1705
1706 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1707 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1708 struct ieee80211_channel_sw_ie *sw_elem =
1709 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1710 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1711 }
1712
1713 ieee80211_rx_bss_put(local, bss);
1714 }
1715
1716
1717 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1718 struct ieee80211_mgmt *mgmt,
1719 size_t len,
1720 struct ieee80211_rx_status *rx_status)
1721 {
1722 struct ieee80211_if_managed *ifmgd;
1723 size_t baselen;
1724 struct ieee802_11_elems elems;
1725
1726 ifmgd = &sdata->u.mgd;
1727
1728 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1729 return; /* ignore ProbeResp to foreign address */
1730
1731 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1732 if (baselen > len)
1733 return;
1734
1735 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1736 &elems);
1737
1738 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1739
1740 /* direct probe may be part of the association flow */
1741 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1742 &ifmgd->request)) {
1743 printk(KERN_DEBUG "%s direct probe responded\n",
1744 sdata->dev->name);
1745 ieee80211_authenticate(sdata);
1746 }
1747
1748 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1749 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1750 }
1751
1752 /*
1753 * This is the canonical list of information elements we care about,
1754 * the filter code also gives us all changes to the Microsoft OUI
1755 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1756 *
1757 * We implement beacon filtering in software since that means we can
1758 * avoid processing the frame here and in cfg80211, and userspace
1759 * will not be able to tell whether the hardware supports it or not.
1760 *
1761 * XXX: This list needs to be dynamic -- userspace needs to be able to
1762 * add items it requires. It also needs to be able to tell us to
1763 * look out for other vendor IEs.
1764 */
1765 static const u64 care_about_ies =
1766 (1ULL << WLAN_EID_COUNTRY) |
1767 (1ULL << WLAN_EID_ERP_INFO) |
1768 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1769 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1770 (1ULL << WLAN_EID_HT_CAPABILITY) |
1771 (1ULL << WLAN_EID_HT_INFORMATION);
1772
1773 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1774 struct ieee80211_mgmt *mgmt,
1775 size_t len,
1776 struct ieee80211_rx_status *rx_status)
1777 {
1778 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1779 size_t baselen;
1780 struct ieee802_11_elems elems;
1781 struct ieee80211_local *local = sdata->local;
1782 u32 changed = 0;
1783 bool erp_valid, directed_tim = false;
1784 u8 erp_value = 0;
1785 u32 ncrc;
1786
1787 /* Process beacon from the current BSS */
1788 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1789 if (baselen > len)
1790 return;
1791
1792 if (rx_status->freq != local->hw.conf.channel->center_freq)
1793 return;
1794
1795 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1796 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1797 return;
1798
1799 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1800 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1801 len - baselen, &elems,
1802 care_about_ies, ncrc);
1803
1804 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1805 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1806 ifmgd->aid);
1807
1808 ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim));
1809
1810 if (ncrc == ifmgd->beacon_crc)
1811 return;
1812 ifmgd->beacon_crc = ncrc;
1813
1814 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1815
1816 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1817 elems.wmm_param_len);
1818
1819 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1820 if (directed_tim) {
1821 if (local->hw.conf.dynamic_ps_timeout > 0) {
1822 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1823 ieee80211_hw_config(local,
1824 IEEE80211_CONF_CHANGE_PS);
1825 ieee80211_send_nullfunc(local, sdata, 0);
1826 } else {
1827 local->pspolling = true;
1828
1829 /*
1830 * Here is assumed that the driver will be
1831 * able to send ps-poll frame and receive a
1832 * response even though power save mode is
1833 * enabled, but some drivers might require
1834 * to disable power save here. This needs
1835 * to be investigated.
1836 */
1837 ieee80211_send_pspoll(local, sdata);
1838 }
1839 }
1840 }
1841
1842 if (elems.erp_info && elems.erp_info_len >= 1) {
1843 erp_valid = true;
1844 erp_value = elems.erp_info[0];
1845 } else {
1846 erp_valid = false;
1847 }
1848 changed |= ieee80211_handle_bss_capability(sdata,
1849 le16_to_cpu(mgmt->u.beacon.capab_info),
1850 erp_valid, erp_value);
1851
1852
1853 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1854 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1855 struct sta_info *sta;
1856 struct ieee80211_supported_band *sband;
1857 u16 ap_ht_cap_flags;
1858
1859 rcu_read_lock();
1860
1861 sta = sta_info_get(local, ifmgd->bssid);
1862 if (!sta) {
1863 rcu_read_unlock();
1864 return;
1865 }
1866
1867 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1868
1869 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1870 elems.ht_cap_elem, &sta->sta.ht_cap);
1871
1872 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1873
1874 rcu_read_unlock();
1875
1876 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1877 ap_ht_cap_flags);
1878 }
1879
1880 if (elems.country_elem) {
1881 /* Note we are only reviewing this on beacons
1882 * for the BSSID we are associated to */
1883 regulatory_hint_11d(local->hw.wiphy,
1884 elems.country_elem, elems.country_elem_len);
1885
1886 /* TODO: IBSS also needs this */
1887 if (elems.pwr_constr_elem)
1888 ieee80211_handle_pwr_constr(sdata,
1889 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1890 elems.pwr_constr_elem,
1891 elems.pwr_constr_elem_len);
1892 }
1893
1894 ieee80211_bss_info_change_notify(sdata, changed);
1895 }
1896
1897 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1898 struct sk_buff *skb,
1899 struct ieee80211_rx_status *rx_status)
1900 {
1901 struct ieee80211_local *local = sdata->local;
1902 struct ieee80211_mgmt *mgmt;
1903 u16 fc;
1904
1905 if (skb->len < 24)
1906 return RX_DROP_MONITOR;
1907
1908 mgmt = (struct ieee80211_mgmt *) skb->data;
1909 fc = le16_to_cpu(mgmt->frame_control);
1910
1911 switch (fc & IEEE80211_FCTL_STYPE) {
1912 case IEEE80211_STYPE_PROBE_REQ:
1913 case IEEE80211_STYPE_PROBE_RESP:
1914 case IEEE80211_STYPE_BEACON:
1915 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1916 case IEEE80211_STYPE_AUTH:
1917 case IEEE80211_STYPE_ASSOC_RESP:
1918 case IEEE80211_STYPE_REASSOC_RESP:
1919 case IEEE80211_STYPE_DEAUTH:
1920 case IEEE80211_STYPE_DISASSOC:
1921 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1922 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1923 return RX_QUEUED;
1924 }
1925
1926 return RX_DROP_MONITOR;
1927 }
1928
1929 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1930 struct sk_buff *skb)
1931 {
1932 struct ieee80211_rx_status *rx_status;
1933 struct ieee80211_mgmt *mgmt;
1934 u16 fc;
1935
1936 rx_status = (struct ieee80211_rx_status *) skb->cb;
1937 mgmt = (struct ieee80211_mgmt *) skb->data;
1938 fc = le16_to_cpu(mgmt->frame_control);
1939
1940 switch (fc & IEEE80211_FCTL_STYPE) {
1941 case IEEE80211_STYPE_PROBE_RESP:
1942 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1943 rx_status);
1944 break;
1945 case IEEE80211_STYPE_BEACON:
1946 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1947 rx_status);
1948 break;
1949 case IEEE80211_STYPE_AUTH:
1950 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1951 break;
1952 case IEEE80211_STYPE_ASSOC_RESP:
1953 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1954 break;
1955 case IEEE80211_STYPE_REASSOC_RESP:
1956 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1957 break;
1958 case IEEE80211_STYPE_DEAUTH:
1959 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1960 break;
1961 case IEEE80211_STYPE_DISASSOC:
1962 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1963 break;
1964 }
1965
1966 kfree_skb(skb);
1967 }
1968
1969 static void ieee80211_sta_timer(unsigned long data)
1970 {
1971 struct ieee80211_sub_if_data *sdata =
1972 (struct ieee80211_sub_if_data *) data;
1973 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1974 struct ieee80211_local *local = sdata->local;
1975
1976 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1977 queue_work(local->hw.workqueue, &ifmgd->work);
1978 }
1979
1980 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1981 {
1982 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1983 struct ieee80211_local *local = sdata->local;
1984
1985 if (local->ops->reset_tsf) {
1986 /* Reset own TSF to allow time synchronization work. */
1987 local->ops->reset_tsf(local_to_hw(local));
1988 }
1989
1990 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1991
1992
1993 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1994 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1995 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1996 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1997 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1998 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1999 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
2000 ifmgd->auth_alg = WLAN_AUTH_FT;
2001 else
2002 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2003 ifmgd->auth_transaction = -1;
2004 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2005 ifmgd->assoc_scan_tries = 0;
2006 ifmgd->direct_probe_tries = 0;
2007 ifmgd->auth_tries = 0;
2008 ifmgd->assoc_tries = 0;
2009 netif_tx_stop_all_queues(sdata->dev);
2010 netif_carrier_off(sdata->dev);
2011 }
2012
2013 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2014 {
2015 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2016 struct ieee80211_local *local = sdata->local;
2017 struct ieee80211_bss *bss;
2018 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2019 u8 ssid_len = ifmgd->ssid_len;
2020 u16 capa_mask = WLAN_CAPABILITY_ESS;
2021 u16 capa_val = WLAN_CAPABILITY_ESS;
2022 struct ieee80211_channel *chan = local->oper_channel;
2023
2024 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2025 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2026 IEEE80211_STA_AUTO_BSSID_SEL |
2027 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2028 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2029 if (sdata->default_key)
2030 capa_val |= WLAN_CAPABILITY_PRIVACY;
2031 }
2032
2033 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2034 chan = NULL;
2035
2036 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2037 bssid = NULL;
2038
2039 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2040 ssid = NULL;
2041 ssid_len = 0;
2042 }
2043
2044 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2045 bssid, ssid, ssid_len,
2046 capa_mask, capa_val);
2047
2048 if (bss) {
2049 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
2050 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2051 ieee80211_sta_set_ssid(sdata, bss->ssid,
2052 bss->ssid_len);
2053 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2054 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2055 bss->supp_rates);
2056 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2057 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2058 else
2059 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2060
2061 /* Send out direct probe if no probe resp was received or
2062 * the one we have is outdated
2063 */
2064 if (!bss->last_probe_resp ||
2065 time_after(jiffies, bss->last_probe_resp
2066 + IEEE80211_SCAN_RESULT_EXPIRE))
2067 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2068 else
2069 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2070
2071 ieee80211_rx_bss_put(local, bss);
2072 ieee80211_sta_reset_auth(sdata);
2073 return 0;
2074 } else {
2075 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2076 u8 ssid_len = 0;
2077
2078 if (!(ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL))
2079 ssid_len = ifmgd->ssid_len;
2080
2081 ifmgd->assoc_scan_tries++;
2082
2083 ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2084 ssid_len);
2085
2086 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2087 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2088 } else {
2089 ifmgd->assoc_scan_tries = 0;
2090 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2091 }
2092 }
2093 return -1;
2094 }
2095
2096
2097 static void ieee80211_sta_work(struct work_struct *work)
2098 {
2099 struct ieee80211_sub_if_data *sdata =
2100 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2101 struct ieee80211_local *local = sdata->local;
2102 struct ieee80211_if_managed *ifmgd;
2103 struct sk_buff *skb;
2104
2105 if (!netif_running(sdata->dev))
2106 return;
2107
2108 if (local->sw_scanning || local->hw_scanning)
2109 return;
2110
2111 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2112 return;
2113 ifmgd = &sdata->u.mgd;
2114
2115 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2116 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2117
2118 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2119 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2120 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2121 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2122 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2123 round_jiffies_relative(0));
2124 return;
2125 }
2126
2127 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2128 if (ieee80211_sta_config_auth(sdata))
2129 return;
2130 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2131 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2132 return;
2133
2134 switch (ifmgd->state) {
2135 case IEEE80211_STA_MLME_DISABLED:
2136 break;
2137 case IEEE80211_STA_MLME_DIRECT_PROBE:
2138 ieee80211_direct_probe(sdata);
2139 break;
2140 case IEEE80211_STA_MLME_AUTHENTICATE:
2141 ieee80211_authenticate(sdata);
2142 break;
2143 case IEEE80211_STA_MLME_ASSOCIATE:
2144 ieee80211_associate(sdata);
2145 break;
2146 case IEEE80211_STA_MLME_ASSOCIATED:
2147 ieee80211_associated(sdata);
2148 break;
2149 default:
2150 WARN_ON(1);
2151 break;
2152 }
2153
2154 if (ieee80211_privacy_mismatch(sdata)) {
2155 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2156 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2157
2158 ieee80211_set_disassoc(sdata, false, true,
2159 WLAN_REASON_UNSPECIFIED);
2160 }
2161 }
2162
2163 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2164 {
2165 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2166 /*
2167 * Need to update last_beacon to avoid beacon loss
2168 * test to trigger.
2169 */
2170 sdata->u.mgd.last_beacon = jiffies;
2171
2172
2173 queue_work(sdata->local->hw.workqueue,
2174 &sdata->u.mgd.work);
2175 }
2176 }
2177
2178 /* interface setup */
2179 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2180 {
2181 struct ieee80211_if_managed *ifmgd;
2182 u32 hw_flags;
2183
2184 ifmgd = &sdata->u.mgd;
2185 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2186 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2187 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2188 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2189 (unsigned long) sdata);
2190 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2191 (unsigned long) sdata);
2192 skb_queue_head_init(&ifmgd->skb_queue);
2193
2194 ifmgd->capab = WLAN_CAPABILITY_ESS;
2195 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2196 IEEE80211_AUTH_ALG_SHARED_KEY;
2197 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
2198 IEEE80211_STA_AUTO_BSSID_SEL |
2199 IEEE80211_STA_AUTO_CHANNEL_SEL;
2200 if (sdata->local->hw.queues >= 4)
2201 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2202
2203 hw_flags = sdata->local->hw.flags;
2204
2205 if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2206 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2207 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2208 }
2209 }
2210
2211 /* configuration hooks */
2212 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2213 {
2214 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2215 struct ieee80211_local *local = sdata->local;
2216
2217 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2218 return;
2219
2220 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
2221 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2222 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
2223 IEEE80211_STA_AUTO_SSID_SEL))) {
2224
2225 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2226 ieee80211_set_disassoc(sdata, true, true,
2227 WLAN_REASON_DEAUTH_LEAVING);
2228
2229 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2230 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2231 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2232 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2233 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2234 queue_work(local->hw.workqueue, &ifmgd->work);
2235 }
2236 }
2237
2238 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2239 {
2240 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2241
2242 if (ifmgd->ssid_len)
2243 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2244 else
2245 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2246
2247 return 0;
2248 }
2249
2250 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2251 {
2252 struct ieee80211_if_managed *ifmgd;
2253
2254 if (len > IEEE80211_MAX_SSID_LEN)
2255 return -EINVAL;
2256
2257 ifmgd = &sdata->u.mgd;
2258
2259 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2260 /*
2261 * Do not use reassociation if SSID is changed (different ESS).
2262 */
2263 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2264 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2265 memcpy(ifmgd->ssid, ssid, len);
2266 ifmgd->ssid_len = len;
2267 }
2268
2269 return ieee80211_sta_commit(sdata);
2270 }
2271
2272 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2273 {
2274 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2275 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2276 *len = ifmgd->ssid_len;
2277 return 0;
2278 }
2279
2280 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2281 {
2282 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2283
2284 if (is_valid_ether_addr(bssid)) {
2285 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2286 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2287 } else {
2288 memset(ifmgd->bssid, 0, ETH_ALEN);
2289 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2290 }
2291
2292 if (netif_running(sdata->dev)) {
2293 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
2294 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2295 "the low-level driver\n", sdata->dev->name);
2296 }
2297 }
2298
2299 return ieee80211_sta_commit(sdata);
2300 }
2301
2302 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2303 const char *ie, size_t len)
2304 {
2305 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2306
2307 kfree(ifmgd->extra_ie);
2308 if (len == 0) {
2309 ifmgd->extra_ie = NULL;
2310 ifmgd->extra_ie_len = 0;
2311 return 0;
2312 }
2313 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2314 if (!ifmgd->extra_ie) {
2315 ifmgd->extra_ie_len = 0;
2316 return -ENOMEM;
2317 }
2318 memcpy(ifmgd->extra_ie, ie, len);
2319 ifmgd->extra_ie_len = len;
2320 return 0;
2321 }
2322
2323 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2324 {
2325 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2326 sdata->dev->name, reason);
2327
2328 ieee80211_set_disassoc(sdata, true, true, reason);
2329 return 0;
2330 }
2331
2332 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2333 {
2334 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2335
2336 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2337 sdata->dev->name, reason);
2338
2339 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2340 return -ENOLINK;
2341
2342 ieee80211_set_disassoc(sdata, false, true, reason);
2343 return 0;
2344 }
2345
2346 /* scan finished notification */
2347 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2348 {
2349 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2350
2351 /* Restart STA timers */
2352 rcu_read_lock();
2353 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2354 ieee80211_restart_sta_timer(sdata);
2355 rcu_read_unlock();
2356 }
2357
2358 int ieee80211_max_network_latency(struct notifier_block *nb,
2359 unsigned long data, void *dummy)
2360 {
2361 s32 latency_usec = (s32) data;
2362 struct ieee80211_local *local =
2363 container_of(nb, struct ieee80211_local,
2364 network_latency_notifier);
2365
2366 mutex_lock(&local->iflist_mtx);
2367 ieee80211_recalc_ps(local, latency_usec);
2368 mutex_unlock(&local->iflist_mtx);
2369
2370 return 0;
2371 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree